From fcbb27b0ec6dcbc5a5108cb8fb19eae64593d204 Mon Sep 17 00:00:00 2001 From: Timothy Pearson Date: Wed, 23 Aug 2017 14:45:25 -0500 Subject: Initial import of modified Linux 2.6.28 tree Original upstream URL: git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git | branch linux-2.6.28.y --- net/atm/Kconfig | 73 ++ net/atm/Makefile | 15 + net/atm/addr.c | 160 ++++ net/atm/addr.h | 20 + net/atm/atm_misc.c | 109 +++ net/atm/atm_sysfs.c | 187 ++++ net/atm/br2684.c | 795 ++++++++++++++++ net/atm/clip.c | 1021 ++++++++++++++++++++ net/atm/common.c | 818 ++++++++++++++++ net/atm/common.h | 54 ++ net/atm/ioctl.c | 162 ++++ net/atm/lec.c | 2488 +++++++++++++++++++++++++++++++++++++++++++++++++ net/atm/lec.h | 156 ++++ net/atm/lec_arpc.h | 96 ++ net/atm/mpc.c | 1506 ++++++++++++++++++++++++++++++ net/atm/mpc.h | 61 ++ net/atm/mpoa_caches.c | 564 +++++++++++ net/atm/mpoa_caches.h | 96 ++ net/atm/mpoa_proc.c | 303 ++++++ net/atm/pppoatm.c | 357 +++++++ net/atm/proc.c | 496 ++++++++++ net/atm/protocols.h | 13 + net/atm/pvc.c | 157 ++++ net/atm/raw.c | 90 ++ net/atm/resources.c | 437 +++++++++ net/atm/resources.h | 47 + net/atm/signaling.c | 269 ++++++ net/atm/signaling.h | 30 + net/atm/svc.c | 669 +++++++++++++ 29 files changed, 11249 insertions(+) create mode 100644 net/atm/Kconfig create mode 100644 net/atm/Makefile create mode 100644 net/atm/addr.c create mode 100644 net/atm/addr.h create mode 100644 net/atm/atm_misc.c create mode 100644 net/atm/atm_sysfs.c create mode 100644 net/atm/br2684.c create mode 100644 net/atm/clip.c create mode 100644 net/atm/common.c create mode 100644 net/atm/common.h create mode 100644 net/atm/ioctl.c create mode 100644 net/atm/lec.c create mode 100644 net/atm/lec.h create mode 100644 net/atm/lec_arpc.h create mode 100644 net/atm/mpc.c create mode 100644 net/atm/mpc.h create mode 100644 net/atm/mpoa_caches.c create mode 100644 net/atm/mpoa_caches.h create mode 100644 net/atm/mpoa_proc.c create mode 100644 net/atm/pppoatm.c create mode 100644 net/atm/proc.c create mode 100644 net/atm/protocols.h create mode 100644 net/atm/pvc.c create mode 100644 net/atm/raw.c create mode 100644 net/atm/resources.c create mode 100644 net/atm/resources.h create mode 100644 net/atm/signaling.c create mode 100644 net/atm/signaling.h create mode 100644 net/atm/svc.c (limited to 'net/atm') diff --git a/net/atm/Kconfig b/net/atm/Kconfig new file mode 100644 index 0000000..754ea10 --- /dev/null +++ b/net/atm/Kconfig @@ -0,0 +1,73 @@ +# +# Asynchronous Transfer Mode (ATM) +# + +config ATM + tristate "Asynchronous Transfer Mode (ATM)" + ---help--- + ATM is a high-speed networking technology for Local Area Networks + and Wide Area Networks. It uses a fixed packet size and is + connection oriented, allowing for the negotiation of minimum + bandwidth requirements. + + In order to participate in an ATM network, your Linux box needs an + ATM networking card. If you have that, say Y here and to the driver + of your ATM card below. + + Note that you need a set of user-space programs to actually make use + of ATM. See the file for + further details. + +config ATM_CLIP + tristate "Classical IP over ATM" + depends on ATM && INET + help + Classical IP over ATM for PVCs and SVCs, supporting InARP and + ATMARP. If you want to communication with other IP hosts on your ATM + network, you will typically either say Y here or to "LAN Emulation + (LANE)" below. + +config ATM_CLIP_NO_ICMP + bool "Do NOT send ICMP if no neighbour" + depends on ATM_CLIP + help + Normally, an "ICMP host unreachable" message is sent if a neighbour + cannot be reached because there is no VC to it in the kernel's + ATMARP table. This may cause problems when ATMARP table entries are + briefly removed during revalidation. If you say Y here, packets to + such neighbours are silently discarded instead. + +config ATM_LANE + tristate "LAN Emulation (LANE) support" + depends on ATM + help + LAN Emulation emulates services of existing LANs across an ATM + network. Besides operating as a normal ATM end station client, Linux + LANE client can also act as an proxy client bridging packets between + ELAN and Ethernet segments. You need LANE if you want to try MPOA. + +config ATM_MPOA + tristate "Multi-Protocol Over ATM (MPOA) support" + depends on ATM && INET && ATM_LANE!=n + help + Multi-Protocol Over ATM allows ATM edge devices such as routers, + bridges and ATM attached hosts establish direct ATM VCs across + subnetwork boundaries. These shortcut connections bypass routers + enhancing overall network performance. + +config ATM_BR2684 + tristate "RFC1483/2684 Bridged protocols" + depends on ATM && INET + help + ATM PVCs can carry ethernet PDUs according to RFC2684 (formerly 1483) + This device will act like an ethernet from the kernels point of view, + with the traffic being carried by ATM PVCs (currently 1 PVC/device). + This is sometimes used over DSL lines. If in doubt, say N. + +config ATM_BR2684_IPFILTER + bool "Per-VC IP filter kludge" + depends on ATM_BR2684 + help + This is an experimental mechanism for users who need to terminate a + large number of IP-only vcc's. Do not enable this unless you are sure + you know what you are doing. diff --git a/net/atm/Makefile b/net/atm/Makefile new file mode 100644 index 0000000..cc50bd1 --- /dev/null +++ b/net/atm/Makefile @@ -0,0 +1,15 @@ +# +# Makefile for the ATM Protocol Families. +# + +atm-y := addr.o pvc.o signaling.o svc.o ioctl.o common.o atm_misc.o raw.o resources.o atm_sysfs.o +mpoa-objs := mpc.o mpoa_caches.o mpoa_proc.o + +obj-$(CONFIG_ATM) += atm.o +obj-$(CONFIG_ATM_CLIP) += clip.o +obj-$(CONFIG_ATM_BR2684) += br2684.o +atm-$(CONFIG_PROC_FS) += proc.o + +obj-$(CONFIG_ATM_LANE) += lec.o +obj-$(CONFIG_ATM_MPOA) += mpoa.o +obj-$(CONFIG_PPPOATM) += pppoatm.o diff --git a/net/atm/addr.c b/net/atm/addr.c new file mode 100644 index 0000000..82e85ab --- /dev/null +++ b/net/atm/addr.c @@ -0,0 +1,160 @@ +/* net/atm/addr.c - Local ATM address registry */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + +#include +#include +#include + +#include "signaling.h" +#include "addr.h" + +static int check_addr(const struct sockaddr_atmsvc *addr) +{ + int i; + + if (addr->sas_family != AF_ATMSVC) + return -EAFNOSUPPORT; + if (!*addr->sas_addr.pub) + return *addr->sas_addr.prv ? 0 : -EINVAL; + for (i = 1; i < ATM_E164_LEN + 1; i++) /* make sure it's \0-terminated */ + if (!addr->sas_addr.pub[i]) + return 0; + return -EINVAL; +} + +static int identical(const struct sockaddr_atmsvc *a, const struct sockaddr_atmsvc *b) +{ + if (*a->sas_addr.prv) + if (memcmp(a->sas_addr.prv, b->sas_addr.prv, ATM_ESA_LEN)) + return 0; + if (!*a->sas_addr.pub) + return !*b->sas_addr.pub; + if (!*b->sas_addr.pub) + return 0; + return !strcmp(a->sas_addr.pub, b->sas_addr.pub); +} + +static void notify_sigd(const struct atm_dev *dev) +{ + struct sockaddr_atmpvc pvc; + + pvc.sap_addr.itf = dev->number; + sigd_enq(NULL, as_itf_notify, NULL, &pvc, NULL); +} + +void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t atype) +{ + unsigned long flags; + struct atm_dev_addr *this, *p; + struct list_head *head; + + spin_lock_irqsave(&dev->lock, flags); + if (atype == ATM_ADDR_LECS) + head = &dev->lecs; + else + head = &dev->local; + list_for_each_entry_safe(this, p, head, entry) { + list_del(&this->entry); + kfree(this); + } + spin_unlock_irqrestore(&dev->lock, flags); + if (head == &dev->local) + notify_sigd(dev); +} + +int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, + enum atm_addr_type_t atype) +{ + unsigned long flags; + struct atm_dev_addr *this; + struct list_head *head; + int error; + + error = check_addr(addr); + if (error) + return error; + spin_lock_irqsave(&dev->lock, flags); + if (atype == ATM_ADDR_LECS) + head = &dev->lecs; + else + head = &dev->local; + list_for_each_entry(this, head, entry) { + if (identical(&this->addr, addr)) { + spin_unlock_irqrestore(&dev->lock, flags); + return -EEXIST; + } + } + this = kmalloc(sizeof(struct atm_dev_addr), GFP_ATOMIC); + if (!this) { + spin_unlock_irqrestore(&dev->lock, flags); + return -ENOMEM; + } + this->addr = *addr; + list_add(&this->entry, head); + spin_unlock_irqrestore(&dev->lock, flags); + if (head == &dev->local) + notify_sigd(dev); + return 0; +} + +int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, + enum atm_addr_type_t atype) +{ + unsigned long flags; + struct atm_dev_addr *this; + struct list_head *head; + int error; + + error = check_addr(addr); + if (error) + return error; + spin_lock_irqsave(&dev->lock, flags); + if (atype == ATM_ADDR_LECS) + head = &dev->lecs; + else + head = &dev->local; + list_for_each_entry(this, head, entry) { + if (identical(&this->addr, addr)) { + list_del(&this->entry); + spin_unlock_irqrestore(&dev->lock, flags); + kfree(this); + if (head == &dev->local) + notify_sigd(dev); + return 0; + } + } + spin_unlock_irqrestore(&dev->lock, flags); + return -ENOENT; +} + +int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user * buf, + size_t size, enum atm_addr_type_t atype) +{ + unsigned long flags; + struct atm_dev_addr *this; + struct list_head *head; + int total = 0, error; + struct sockaddr_atmsvc *tmp_buf, *tmp_bufp; + + spin_lock_irqsave(&dev->lock, flags); + if (atype == ATM_ADDR_LECS) + head = &dev->lecs; + else + head = &dev->local; + list_for_each_entry(this, head, entry) + total += sizeof(struct sockaddr_atmsvc); + tmp_buf = tmp_bufp = kmalloc(total, GFP_ATOMIC); + if (!tmp_buf) { + spin_unlock_irqrestore(&dev->lock, flags); + return -ENOMEM; + } + list_for_each_entry(this, head, entry) + memcpy(tmp_bufp++, &this->addr, sizeof(struct sockaddr_atmsvc)); + spin_unlock_irqrestore(&dev->lock, flags); + error = total > size ? -E2BIG : total; + if (copy_to_user(buf, tmp_buf, total < size ? total : size)) + error = -EFAULT; + kfree(tmp_buf); + return error; +} diff --git a/net/atm/addr.h b/net/atm/addr.h new file mode 100644 index 0000000..6837e9e --- /dev/null +++ b/net/atm/addr.h @@ -0,0 +1,20 @@ +/* net/atm/addr.h - Local ATM address registry */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#ifndef NET_ATM_ADDR_H +#define NET_ATM_ADDR_H + +#include +#include + +void atm_reset_addr(struct atm_dev *dev, enum atm_addr_type_t type); +int atm_add_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, + enum atm_addr_type_t type); +int atm_del_addr(struct atm_dev *dev, const struct sockaddr_atmsvc *addr, + enum atm_addr_type_t type); +int atm_get_addr(struct atm_dev *dev, struct sockaddr_atmsvc __user *buf, + size_t size, enum atm_addr_type_t type); + +#endif diff --git a/net/atm/atm_misc.c b/net/atm/atm_misc.c new file mode 100644 index 0000000..02cc7e7 --- /dev/null +++ b/net/atm/atm_misc.c @@ -0,0 +1,109 @@ +/* net/atm/atm_misc.c - Various functions for use by ATM drivers */ + +/* Written 1995-2000 by Werner Almesberger, EPFL ICA */ + + +#include +#include +#include +#include +#include +#include +#include +#include + + +int atm_charge(struct atm_vcc *vcc,int truesize) +{ + atm_force_charge(vcc,truesize); + if (atomic_read(&sk_atm(vcc)->sk_rmem_alloc) <= sk_atm(vcc)->sk_rcvbuf) + return 1; + atm_return(vcc,truesize); + atomic_inc(&vcc->stats->rx_drop); + return 0; +} + + +struct sk_buff *atm_alloc_charge(struct atm_vcc *vcc,int pdu_size, + gfp_t gfp_flags) +{ + struct sock *sk = sk_atm(vcc); + int guess = atm_guess_pdu2truesize(pdu_size); + + atm_force_charge(vcc,guess); + if (atomic_read(&sk->sk_rmem_alloc) <= sk->sk_rcvbuf) { + struct sk_buff *skb = alloc_skb(pdu_size,gfp_flags); + + if (skb) { + atomic_add(skb->truesize-guess, + &sk->sk_rmem_alloc); + return skb; + } + } + atm_return(vcc,guess); + atomic_inc(&vcc->stats->rx_drop); + return NULL; +} + + +/* + * atm_pcr_goal returns the positive PCR if it should be rounded up, the + * negative PCR if it should be rounded down, and zero if the maximum available + * bandwidth should be used. + * + * The rules are as follows (* = maximum, - = absent (0), x = value "x", + * (x+ = x or next value above x, x- = x or next value below): + * + * min max pcr result min max pcr result + * - - - * (UBR only) x - - x+ + * - - * * x - * * + * - - z z- x - z z- + * - * - * x * - x+ + * - * * * x * * * + * - * z z- x * z z- + * - y - y- x y - x+ + * - y * y- x y * y- + * - y z z- x y z z- + * + * All non-error cases can be converted with the following simple set of rules: + * + * if pcr == z then z- + * else if min == x && pcr == - then x+ + * else if max == y then y- + * else * + */ + + +int atm_pcr_goal(const struct atm_trafprm *tp) +{ + if (tp->pcr && tp->pcr != ATM_MAX_PCR) + return -tp->pcr; + if (tp->min_pcr && !tp->pcr) + return tp->min_pcr; + if (tp->max_pcr != ATM_MAX_PCR) + return -tp->max_pcr; + return 0; +} + + +void sonet_copy_stats(struct k_sonet_stats *from,struct sonet_stats *to) +{ +#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i) + __SONET_ITEMS +#undef __HANDLE_ITEM +} + + +void sonet_subtract_stats(struct k_sonet_stats *from,struct sonet_stats *to) +{ +#define __HANDLE_ITEM(i) atomic_sub(to->i,&from->i) + __SONET_ITEMS +#undef __HANDLE_ITEM +} + + +EXPORT_SYMBOL(atm_charge); +EXPORT_SYMBOL(atm_alloc_charge); +EXPORT_SYMBOL(atm_pcr_goal); +EXPORT_SYMBOL(sonet_copy_stats); +EXPORT_SYMBOL(sonet_subtract_stats); diff --git a/net/atm/atm_sysfs.c b/net/atm/atm_sysfs.c new file mode 100644 index 0000000..1b88311 --- /dev/null +++ b/net/atm/atm_sysfs.c @@ -0,0 +1,187 @@ +/* ATM driver model support. */ + +#include +#include +#include +#include +#include "common.h" +#include "resources.h" + +#define to_atm_dev(cldev) container_of(cldev, struct atm_dev, class_dev) + +static ssize_t show_type(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + struct atm_dev *adev = to_atm_dev(cdev); + return sprintf(buf, "%s\n", adev->type); +} + +static ssize_t show_address(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + char *pos = buf; + struct atm_dev *adev = to_atm_dev(cdev); + int i; + + for (i = 0; i < (ESI_LEN - 1); i++) + pos += sprintf(pos, "%02x:", adev->esi[i]); + pos += sprintf(pos, "%02x\n", adev->esi[i]); + + return pos - buf; +} + +static ssize_t show_atmaddress(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + unsigned long flags; + char *pos = buf; + struct atm_dev *adev = to_atm_dev(cdev); + struct atm_dev_addr *aaddr; + int bin[] = { 1, 2, 10, 6, 1 }, *fmt = bin; + int i, j; + + spin_lock_irqsave(&adev->lock, flags); + list_for_each_entry(aaddr, &adev->local, entry) { + for(i = 0, j = 0; i < ATM_ESA_LEN; ++i, ++j) { + if (j == *fmt) { + pos += sprintf(pos, "."); + ++fmt; + j = 0; + } + pos += sprintf(pos, "%02x", aaddr->addr.sas_addr.prv[i]); + } + pos += sprintf(pos, "\n"); + } + spin_unlock_irqrestore(&adev->lock, flags); + + return pos - buf; +} + +static ssize_t show_carrier(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + char *pos = buf; + struct atm_dev *adev = to_atm_dev(cdev); + + pos += sprintf(pos, "%d\n", + adev->signal == ATM_PHY_SIG_LOST ? 0 : 1); + + return pos - buf; +} + +static ssize_t show_link_rate(struct device *cdev, + struct device_attribute *attr, char *buf) +{ + char *pos = buf; + struct atm_dev *adev = to_atm_dev(cdev); + int link_rate; + + /* show the link rate, not the data rate */ + switch (adev->link_rate) { + case ATM_OC3_PCR: + link_rate = 155520000; + break; + case ATM_OC12_PCR: + link_rate = 622080000; + break; + case ATM_25_PCR: + link_rate = 25600000; + break; + default: + link_rate = adev->link_rate * 8 * 53; + } + pos += sprintf(pos, "%d\n", link_rate); + + return pos - buf; +} + +static DEVICE_ATTR(address, S_IRUGO, show_address, NULL); +static DEVICE_ATTR(atmaddress, S_IRUGO, show_atmaddress, NULL); +static DEVICE_ATTR(carrier, S_IRUGO, show_carrier, NULL); +static DEVICE_ATTR(type, S_IRUGO, show_type, NULL); +static DEVICE_ATTR(link_rate, S_IRUGO, show_link_rate, NULL); + +static struct device_attribute *atm_attrs[] = { + &dev_attr_atmaddress, + &dev_attr_address, + &dev_attr_carrier, + &dev_attr_type, + &dev_attr_link_rate, + NULL +}; + + +static int atm_uevent(struct device *cdev, struct kobj_uevent_env *env) +{ + struct atm_dev *adev; + + if (!cdev) + return -ENODEV; + + adev = to_atm_dev(cdev); + if (!adev) + return -ENODEV; + + if (add_uevent_var(env, "NAME=%s%d", adev->type, adev->number)) + return -ENOMEM; + + return 0; +} + +static void atm_release(struct device *cdev) +{ + struct atm_dev *adev = to_atm_dev(cdev); + + kfree(adev); +} + +static struct class atm_class = { + .name = "atm", + .dev_release = atm_release, + .dev_uevent = atm_uevent, +}; + +int atm_register_sysfs(struct atm_dev *adev) +{ + struct device *cdev = &adev->class_dev; + int i, j, err; + + cdev->class = &atm_class; + dev_set_drvdata(cdev, adev); + + snprintf(cdev->bus_id, BUS_ID_SIZE, "%s%d", adev->type, adev->number); + err = device_register(cdev); + if (err < 0) + return err; + + for (i = 0; atm_attrs[i]; i++) { + err = device_create_file(cdev, atm_attrs[i]); + if (err) + goto err_out; + } + + return 0; + +err_out: + for (j = 0; j < i; j++) + device_remove_file(cdev, atm_attrs[j]); + device_del(cdev); + return err; +} + +void atm_unregister_sysfs(struct atm_dev *adev) +{ + struct device *cdev = &adev->class_dev; + + device_del(cdev); +} + +int __init atm_sysfs_init(void) +{ + return class_register(&atm_class); +} + +void __exit atm_sysfs_exit(void) +{ + class_unregister(&atm_class); +} diff --git a/net/atm/br2684.c b/net/atm/br2684.c new file mode 100644 index 0000000..280de48 --- /dev/null +++ b/net/atm/br2684.c @@ -0,0 +1,795 @@ +/* + * Ethernet netdevice using ATM AAL5 as underlying carrier + * (RFC1483 obsoleted by RFC2684) for Linux + * + * Authors: Marcell GAL, 2000, XDSL Ltd, Hungary + * Eric Kinzie, 2006-2007, US Naval Research Laboratory + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include + +#include "common.h" + +#ifdef SKB_DEBUG +static void skb_debug(const struct sk_buff *skb) +{ +#define NUM2PRINT 50 + char buf[NUM2PRINT * 3 + 1]; /* 3 chars per byte */ + int i = 0; + for (i = 0; i < skb->len && i < NUM2PRINT; i++) { + sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); + } + printk(KERN_DEBUG "br2684: skb: %s\n", buf); +} +#else +#define skb_debug(skb) do {} while (0) +#endif + +#define BR2684_ETHERTYPE_LEN 2 +#define BR2684_PAD_LEN 2 + +#define LLC 0xaa, 0xaa, 0x03 +#define SNAP_BRIDGED 0x00, 0x80, 0xc2 +#define SNAP_ROUTED 0x00, 0x00, 0x00 +#define PID_ETHERNET 0x00, 0x07 +#define ETHERTYPE_IPV4 0x08, 0x00 +#define ETHERTYPE_IPV6 0x86, 0xdd +#define PAD_BRIDGED 0x00, 0x00 + +static const unsigned char ethertype_ipv4[] = { ETHERTYPE_IPV4 }; +static const unsigned char ethertype_ipv6[] = { ETHERTYPE_IPV6 }; +static const unsigned char llc_oui_pid_pad[] = + { LLC, SNAP_BRIDGED, PID_ETHERNET, PAD_BRIDGED }; +static const unsigned char llc_oui_ipv4[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV4 }; +static const unsigned char llc_oui_ipv6[] = { LLC, SNAP_ROUTED, ETHERTYPE_IPV6 }; + +enum br2684_encaps { + e_vc = BR2684_ENCAPS_VC, + e_llc = BR2684_ENCAPS_LLC, +}; + +struct br2684_vcc { + struct atm_vcc *atmvcc; + struct net_device *device; + /* keep old push, pop functions for chaining */ + void (*old_push) (struct atm_vcc * vcc, struct sk_buff * skb); + /* void (*old_pop)(struct atm_vcc *vcc, struct sk_buff *skb); */ + enum br2684_encaps encaps; + struct list_head brvccs; +#ifdef CONFIG_ATM_BR2684_IPFILTER + struct br2684_filter filter; +#endif /* CONFIG_ATM_BR2684_IPFILTER */ + unsigned copies_needed, copies_failed; +}; + +struct br2684_dev { + struct net_device *net_dev; + struct list_head br2684_devs; + int number; + struct list_head brvccs; /* one device <=> one vcc (before xmas) */ + struct net_device_stats stats; + int mac_was_set; + enum br2684_payload payload; +}; + +/* + * This lock should be held for writing any time the list of devices or + * their attached vcc's could be altered. It should be held for reading + * any time these are being queried. Note that we sometimes need to + * do read-locking under interrupt context, so write locking must block + * the current CPU's interrupts + */ +static DEFINE_RWLOCK(devs_lock); + +static LIST_HEAD(br2684_devs); + +static inline struct br2684_dev *BRPRIV(const struct net_device *net_dev) +{ + return (struct br2684_dev *)net_dev->priv; +} + +static inline struct net_device *list_entry_brdev(const struct list_head *le) +{ + return list_entry(le, struct br2684_dev, br2684_devs)->net_dev; +} + +static inline struct br2684_vcc *BR2684_VCC(const struct atm_vcc *atmvcc) +{ + return (struct br2684_vcc *)(atmvcc->user_back); +} + +static inline struct br2684_vcc *list_entry_brvcc(const struct list_head *le) +{ + return list_entry(le, struct br2684_vcc, brvccs); +} + +/* Caller should hold read_lock(&devs_lock) */ +static struct net_device *br2684_find_dev(const struct br2684_if_spec *s) +{ + struct list_head *lh; + struct net_device *net_dev; + switch (s->method) { + case BR2684_FIND_BYNUM: + list_for_each(lh, &br2684_devs) { + net_dev = list_entry_brdev(lh); + if (BRPRIV(net_dev)->number == s->spec.devnum) + return net_dev; + } + break; + case BR2684_FIND_BYIFNAME: + list_for_each(lh, &br2684_devs) { + net_dev = list_entry_brdev(lh); + if (!strncmp(net_dev->name, s->spec.ifname, IFNAMSIZ)) + return net_dev; + } + break; + } + return NULL; +} + +/* + * Send a packet out a particular vcc. Not to useful right now, but paves + * the way for multiple vcc's per itf. Returns true if we can send, + * otherwise false + */ +static int br2684_xmit_vcc(struct sk_buff *skb, struct br2684_dev *brdev, + struct br2684_vcc *brvcc) +{ + struct atm_vcc *atmvcc; + int minheadroom = (brvcc->encaps == e_llc) ? 10 : 2; + + if (skb_headroom(skb) < minheadroom) { + struct sk_buff *skb2 = skb_realloc_headroom(skb, minheadroom); + brvcc->copies_needed++; + dev_kfree_skb(skb); + if (skb2 == NULL) { + brvcc->copies_failed++; + return 0; + } + skb = skb2; + } + + if (brvcc->encaps == e_llc) { + if (brdev->payload == p_bridged) { + skb_push(skb, sizeof(llc_oui_pid_pad)); + skb_copy_to_linear_data(skb, llc_oui_pid_pad, + sizeof(llc_oui_pid_pad)); + } else if (brdev->payload == p_routed) { + unsigned short prot = ntohs(skb->protocol); + + skb_push(skb, sizeof(llc_oui_ipv4)); + switch (prot) { + case ETH_P_IP: + skb_copy_to_linear_data(skb, llc_oui_ipv4, + sizeof(llc_oui_ipv4)); + break; + case ETH_P_IPV6: + skb_copy_to_linear_data(skb, llc_oui_ipv6, + sizeof(llc_oui_ipv6)); + break; + default: + dev_kfree_skb(skb); + return 0; + } + } + } else { /* e_vc */ + if (brdev->payload == p_bridged) { + skb_push(skb, 2); + memset(skb->data, 0, 2); + } else { /* p_routed */ + skb_pull(skb, ETH_HLEN); + } + } + skb_debug(skb); + + ATM_SKB(skb)->vcc = atmvcc = brvcc->atmvcc; + pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, atmvcc, atmvcc->dev); + if (!atm_may_send(atmvcc, skb->truesize)) { + /* + * We free this here for now, because we cannot know in a higher + * layer whether the skb pointer it supplied wasn't freed yet. + * Now, it always is. + */ + dev_kfree_skb(skb); + return 0; + } + atomic_add(skb->truesize, &sk_atm(atmvcc)->sk_wmem_alloc); + ATM_SKB(skb)->atm_options = atmvcc->atm_options; + brdev->stats.tx_packets++; + brdev->stats.tx_bytes += skb->len; + atmvcc->send(atmvcc, skb); + return 1; +} + +static inline struct br2684_vcc *pick_outgoing_vcc(const struct sk_buff *skb, + const struct br2684_dev *brdev) +{ + return list_empty(&brdev->brvccs) ? NULL : list_entry_brvcc(brdev->brvccs.next); /* 1 vcc/dev right now */ +} + +static int br2684_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct br2684_dev *brdev = BRPRIV(dev); + struct br2684_vcc *brvcc; + + pr_debug("br2684_start_xmit, skb->dst=%p\n", skb->dst); + read_lock(&devs_lock); + brvcc = pick_outgoing_vcc(skb, brdev); + if (brvcc == NULL) { + pr_debug("no vcc attached to dev %s\n", dev->name); + brdev->stats.tx_errors++; + brdev->stats.tx_carrier_errors++; + /* netif_stop_queue(dev); */ + dev_kfree_skb(skb); + read_unlock(&devs_lock); + return 0; + } + if (!br2684_xmit_vcc(skb, brdev, brvcc)) { + /* + * We should probably use netif_*_queue() here, but that + * involves added complication. We need to walk before + * we can run. + * + * Don't free here! this pointer might be no longer valid! + */ + brdev->stats.tx_errors++; + brdev->stats.tx_fifo_errors++; + } + read_unlock(&devs_lock); + return 0; +} + +static struct net_device_stats *br2684_get_stats(struct net_device *dev) +{ + pr_debug("br2684_get_stats\n"); + return &BRPRIV(dev)->stats; +} + +/* + * We remember when the MAC gets set, so we don't override it later with + * the ESI of the ATM card of the first VC + */ +static int (*my_eth_mac_addr) (struct net_device *, void *); +static int br2684_mac_addr(struct net_device *dev, void *p) +{ + int err = my_eth_mac_addr(dev, p); + if (!err) + BRPRIV(dev)->mac_was_set = 1; + return err; +} + +#ifdef CONFIG_ATM_BR2684_IPFILTER +/* this IOCTL is experimental. */ +static int br2684_setfilt(struct atm_vcc *atmvcc, void __user * arg) +{ + struct br2684_vcc *brvcc; + struct br2684_filter_set fs; + + if (copy_from_user(&fs, arg, sizeof fs)) + return -EFAULT; + if (fs.ifspec.method != BR2684_FIND_BYNOTHING) { + /* + * This is really a per-vcc thing, but we can also search + * by device. + */ + struct br2684_dev *brdev; + read_lock(&devs_lock); + brdev = BRPRIV(br2684_find_dev(&fs.ifspec)); + if (brdev == NULL || list_empty(&brdev->brvccs) || brdev->brvccs.next != brdev->brvccs.prev) /* >1 VCC */ + brvcc = NULL; + else + brvcc = list_entry_brvcc(brdev->brvccs.next); + read_unlock(&devs_lock); + if (brvcc == NULL) + return -ESRCH; + } else + brvcc = BR2684_VCC(atmvcc); + memcpy(&brvcc->filter, &fs.filter, sizeof(brvcc->filter)); + return 0; +} + +/* Returns 1 if packet should be dropped */ +static inline int +packet_fails_filter(__be16 type, struct br2684_vcc *brvcc, struct sk_buff *skb) +{ + if (brvcc->filter.netmask == 0) + return 0; /* no filter in place */ + if (type == htons(ETH_P_IP) && + (((struct iphdr *)(skb->data))->daddr & brvcc->filter. + netmask) == brvcc->filter.prefix) + return 0; + if (type == htons(ETH_P_ARP)) + return 0; + /* + * TODO: we should probably filter ARPs too.. don't want to have + * them returning values that don't make sense, or is that ok? + */ + return 1; /* drop */ +} +#endif /* CONFIG_ATM_BR2684_IPFILTER */ + +static void br2684_close_vcc(struct br2684_vcc *brvcc) +{ + pr_debug("removing VCC %p from dev %p\n", brvcc, brvcc->device); + write_lock_irq(&devs_lock); + list_del(&brvcc->brvccs); + write_unlock_irq(&devs_lock); + brvcc->atmvcc->user_back = NULL; /* what about vcc->recvq ??? */ + brvcc->old_push(brvcc->atmvcc, NULL); /* pass on the bad news */ + kfree(brvcc); + module_put(THIS_MODULE); +} + +/* when AAL5 PDU comes in: */ +static void br2684_push(struct atm_vcc *atmvcc, struct sk_buff *skb) +{ + struct br2684_vcc *brvcc = BR2684_VCC(atmvcc); + struct net_device *net_dev = brvcc->device; + struct br2684_dev *brdev = BRPRIV(net_dev); + + pr_debug("br2684_push\n"); + + if (unlikely(skb == NULL)) { + /* skb==NULL means VCC is being destroyed */ + br2684_close_vcc(brvcc); + if (list_empty(&brdev->brvccs)) { + write_lock_irq(&devs_lock); + list_del(&brdev->br2684_devs); + write_unlock_irq(&devs_lock); + unregister_netdev(net_dev); + free_netdev(net_dev); + } + return; + } + + skb_debug(skb); + atm_return(atmvcc, skb->truesize); + pr_debug("skb from brdev %p\n", brdev); + if (brvcc->encaps == e_llc) { + + if (skb->len > 7 && skb->data[7] == 0x01) + __skb_trim(skb, skb->len - 4); + + /* accept packets that have "ipv[46]" in the snap header */ + if ((skb->len >= (sizeof(llc_oui_ipv4))) + && + (memcmp + (skb->data, llc_oui_ipv4, + sizeof(llc_oui_ipv4) - BR2684_ETHERTYPE_LEN) == 0)) { + if (memcmp + (skb->data + 6, ethertype_ipv6, + sizeof(ethertype_ipv6)) == 0) + skb->protocol = htons(ETH_P_IPV6); + else if (memcmp + (skb->data + 6, ethertype_ipv4, + sizeof(ethertype_ipv4)) == 0) + skb->protocol = htons(ETH_P_IP); + else + goto error; + skb_pull(skb, sizeof(llc_oui_ipv4)); + skb_reset_network_header(skb); + skb->pkt_type = PACKET_HOST; + /* + * Let us waste some time for checking the encapsulation. + * Note, that only 7 char is checked so frames with a valid FCS + * are also accepted (but FCS is not checked of course). + */ + } else if ((skb->len >= sizeof(llc_oui_pid_pad)) && + (memcmp(skb->data, llc_oui_pid_pad, 7) == 0)) { + skb_pull(skb, sizeof(llc_oui_pid_pad)); + skb->protocol = eth_type_trans(skb, net_dev); + } else + goto error; + + } else { /* e_vc */ + if (brdev->payload == p_routed) { + struct iphdr *iph; + + skb_reset_network_header(skb); + iph = ip_hdr(skb); + if (iph->version == 4) + skb->protocol = htons(ETH_P_IP); + else if (iph->version == 6) + skb->protocol = htons(ETH_P_IPV6); + else + goto error; + skb->pkt_type = PACKET_HOST; + } else { /* p_bridged */ + /* first 2 chars should be 0 */ + if (*((u16 *) (skb->data)) != 0) + goto error; + skb_pull(skb, BR2684_PAD_LEN); + skb->protocol = eth_type_trans(skb, net_dev); + } + } + +#ifdef CONFIG_ATM_BR2684_IPFILTER + if (unlikely(packet_fails_filter(skb->protocol, brvcc, skb))) + goto dropped; +#endif /* CONFIG_ATM_BR2684_IPFILTER */ + skb->dev = net_dev; + ATM_SKB(skb)->vcc = atmvcc; /* needed ? */ + pr_debug("received packet's protocol: %x\n", ntohs(skb->protocol)); + skb_debug(skb); + /* sigh, interface is down? */ + if (unlikely(!(net_dev->flags & IFF_UP))) + goto dropped; + brdev->stats.rx_packets++; + brdev->stats.rx_bytes += skb->len; + memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); + netif_rx(skb); + return; + +dropped: + brdev->stats.rx_dropped++; + goto free_skb; +error: + brdev->stats.rx_errors++; +free_skb: + dev_kfree_skb(skb); + return; +} + +/* + * Assign a vcc to a dev + * Note: we do not have explicit unassign, but look at _push() + */ +static int br2684_regvcc(struct atm_vcc *atmvcc, void __user * arg) +{ + int err; + struct br2684_vcc *brvcc; + struct sk_buff *skb; + struct sk_buff_head *rq; + struct br2684_dev *brdev; + struct net_device *net_dev; + struct atm_backend_br2684 be; + unsigned long flags; + + if (copy_from_user(&be, arg, sizeof be)) + return -EFAULT; + brvcc = kzalloc(sizeof(struct br2684_vcc), GFP_KERNEL); + if (!brvcc) + return -ENOMEM; + write_lock_irq(&devs_lock); + net_dev = br2684_find_dev(&be.ifspec); + if (net_dev == NULL) { + printk(KERN_ERR + "br2684: tried to attach to non-existant device\n"); + err = -ENXIO; + goto error; + } + brdev = BRPRIV(net_dev); + if (atmvcc->push == NULL) { + err = -EBADFD; + goto error; + } + if (!list_empty(&brdev->brvccs)) { + /* Only 1 VCC/dev right now */ + err = -EEXIST; + goto error; + } + if (be.fcs_in != BR2684_FCSIN_NO || be.fcs_out != BR2684_FCSOUT_NO || + be.fcs_auto || be.has_vpiid || be.send_padding || (be.encaps != + BR2684_ENCAPS_VC + && be.encaps != + BR2684_ENCAPS_LLC) + || be.min_size != 0) { + err = -EINVAL; + goto error; + } + pr_debug("br2684_regvcc vcc=%p, encaps=%d, brvcc=%p\n", atmvcc, + be.encaps, brvcc); + if (list_empty(&brdev->brvccs) && !brdev->mac_was_set) { + unsigned char *esi = atmvcc->dev->esi; + if (esi[0] | esi[1] | esi[2] | esi[3] | esi[4] | esi[5]) + memcpy(net_dev->dev_addr, esi, net_dev->addr_len); + else + net_dev->dev_addr[2] = 1; + } + list_add(&brvcc->brvccs, &brdev->brvccs); + write_unlock_irq(&devs_lock); + brvcc->device = net_dev; + brvcc->atmvcc = atmvcc; + atmvcc->user_back = brvcc; + brvcc->encaps = (enum br2684_encaps)be.encaps; + brvcc->old_push = atmvcc->push; + barrier(); + atmvcc->push = br2684_push; + + rq = &sk_atm(atmvcc)->sk_receive_queue; + + spin_lock_irqsave(&rq->lock, flags); + if (skb_queue_empty(rq)) { + skb = NULL; + } else { + /* NULL terminate the list. */ + rq->prev->next = NULL; + skb = rq->next; + } + rq->prev = rq->next = (struct sk_buff *)rq; + rq->qlen = 0; + spin_unlock_irqrestore(&rq->lock, flags); + + while (skb) { + struct sk_buff *next = skb->next; + + skb->next = skb->prev = NULL; + br2684_push(atmvcc, skb); + BRPRIV(skb->dev)->stats.rx_bytes -= skb->len; + BRPRIV(skb->dev)->stats.rx_packets--; + + skb = next; + } + __module_get(THIS_MODULE); + return 0; + error: + write_unlock_irq(&devs_lock); + kfree(brvcc); + return err; +} + +static void br2684_setup(struct net_device *netdev) +{ + struct br2684_dev *brdev = BRPRIV(netdev); + + ether_setup(netdev); + brdev->net_dev = netdev; + + my_eth_mac_addr = netdev->set_mac_address; + netdev->set_mac_address = br2684_mac_addr; + netdev->hard_start_xmit = br2684_start_xmit; + netdev->get_stats = br2684_get_stats; + + INIT_LIST_HEAD(&brdev->brvccs); +} + +static void br2684_setup_routed(struct net_device *netdev) +{ + struct br2684_dev *brdev = BRPRIV(netdev); + brdev->net_dev = netdev; + + netdev->hard_header_len = 0; + my_eth_mac_addr = netdev->set_mac_address; + netdev->set_mac_address = br2684_mac_addr; + netdev->hard_start_xmit = br2684_start_xmit; + netdev->get_stats = br2684_get_stats; + netdev->addr_len = 0; + netdev->mtu = 1500; + netdev->type = ARPHRD_PPP; + netdev->flags = IFF_POINTOPOINT | IFF_NOARP | IFF_MULTICAST; + netdev->tx_queue_len = 100; + INIT_LIST_HEAD(&brdev->brvccs); +} + +static int br2684_create(void __user * arg) +{ + int err; + struct net_device *netdev; + struct br2684_dev *brdev; + struct atm_newif_br2684 ni; + enum br2684_payload payload; + + pr_debug("br2684_create\n"); + + if (copy_from_user(&ni, arg, sizeof ni)) { + return -EFAULT; + } + + if (ni.media & BR2684_FLAG_ROUTED) + payload = p_routed; + else + payload = p_bridged; + ni.media &= 0xffff; /* strip flags */ + + if (ni.media != BR2684_MEDIA_ETHERNET || ni.mtu != 1500) { + return -EINVAL; + } + + netdev = alloc_netdev(sizeof(struct br2684_dev), + ni.ifname[0] ? ni.ifname : "nas%d", + (payload == p_routed) ? + br2684_setup_routed : br2684_setup); + if (!netdev) + return -ENOMEM; + + brdev = BRPRIV(netdev); + + pr_debug("registered netdev %s\n", netdev->name); + /* open, stop, do_ioctl ? */ + err = register_netdev(netdev); + if (err < 0) { + printk(KERN_ERR "br2684_create: register_netdev failed\n"); + free_netdev(netdev); + return err; + } + + write_lock_irq(&devs_lock); + brdev->payload = payload; + brdev->number = list_empty(&br2684_devs) ? 1 : + BRPRIV(list_entry_brdev(br2684_devs.prev))->number + 1; + list_add_tail(&brdev->br2684_devs, &br2684_devs); + write_unlock_irq(&devs_lock); + return 0; +} + +/* + * This handles ioctls actually performed on our vcc - we must return + * -ENOIOCTLCMD for any unrecognized ioctl + */ +static int br2684_ioctl(struct socket *sock, unsigned int cmd, + unsigned long arg) +{ + struct atm_vcc *atmvcc = ATM_SD(sock); + void __user *argp = (void __user *)arg; + atm_backend_t b; + + int err; + switch (cmd) { + case ATM_SETBACKEND: + case ATM_NEWBACKENDIF: + err = get_user(b, (atm_backend_t __user *) argp); + if (err) + return -EFAULT; + if (b != ATM_BACKEND_BR2684) + return -ENOIOCTLCMD; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + if (cmd == ATM_SETBACKEND) + return br2684_regvcc(atmvcc, argp); + else + return br2684_create(argp); +#ifdef CONFIG_ATM_BR2684_IPFILTER + case BR2684_SETFILT: + if (atmvcc->push != br2684_push) + return -ENOIOCTLCMD; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + err = br2684_setfilt(atmvcc, argp); + + return err; +#endif /* CONFIG_ATM_BR2684_IPFILTER */ + } + return -ENOIOCTLCMD; +} + +static struct atm_ioctl br2684_ioctl_ops = { + .owner = THIS_MODULE, + .ioctl = br2684_ioctl, +}; + +#ifdef CONFIG_PROC_FS +static void *br2684_seq_start(struct seq_file *seq, loff_t * pos) + __acquires(devs_lock) +{ + read_lock(&devs_lock); + return seq_list_start(&br2684_devs, *pos); +} + +static void *br2684_seq_next(struct seq_file *seq, void *v, loff_t * pos) +{ + return seq_list_next(v, &br2684_devs, pos); +} + +static void br2684_seq_stop(struct seq_file *seq, void *v) + __releases(devs_lock) +{ + read_unlock(&devs_lock); +} + +static int br2684_seq_show(struct seq_file *seq, void *v) +{ + const struct br2684_dev *brdev = list_entry(v, struct br2684_dev, + br2684_devs); + const struct net_device *net_dev = brdev->net_dev; + const struct br2684_vcc *brvcc; + DECLARE_MAC_BUF(mac); + + seq_printf(seq, "dev %.16s: num=%d, mac=%s (%s)\n", + net_dev->name, + brdev->number, + print_mac(mac, net_dev->dev_addr), + brdev->mac_was_set ? "set" : "auto"); + + list_for_each_entry(brvcc, &brdev->brvccs, brvccs) { + seq_printf(seq, " vcc %d.%d.%d: encaps=%s payload=%s" + ", failed copies %u/%u" + "\n", brvcc->atmvcc->dev->number, + brvcc->atmvcc->vpi, brvcc->atmvcc->vci, + (brvcc->encaps == e_llc) ? "LLC" : "VC", + (brdev->payload == p_bridged) ? "bridged" : "routed", + brvcc->copies_failed, brvcc->copies_needed); +#ifdef CONFIG_ATM_BR2684_IPFILTER +#define b1(var, byte) ((u8 *) &brvcc->filter.var)[byte] +#define bs(var) b1(var, 0), b1(var, 1), b1(var, 2), b1(var, 3) + if (brvcc->filter.netmask != 0) + seq_printf(seq, " filter=%d.%d.%d.%d/" + "%d.%d.%d.%d\n", bs(prefix), bs(netmask)); +#undef bs +#undef b1 +#endif /* CONFIG_ATM_BR2684_IPFILTER */ + } + return 0; +} + +static const struct seq_operations br2684_seq_ops = { + .start = br2684_seq_start, + .next = br2684_seq_next, + .stop = br2684_seq_stop, + .show = br2684_seq_show, +}; + +static int br2684_proc_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &br2684_seq_ops); +} + +static const struct file_operations br2684_proc_ops = { + .owner = THIS_MODULE, + .open = br2684_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +extern struct proc_dir_entry *atm_proc_root; /* from proc.c */ +#endif /* CONFIG_PROC_FS */ + +static int __init br2684_init(void) +{ +#ifdef CONFIG_PROC_FS + struct proc_dir_entry *p; + p = proc_create("br2684", 0, atm_proc_root, &br2684_proc_ops); + if (p == NULL) + return -ENOMEM; +#endif + register_atm_ioctl(&br2684_ioctl_ops); + return 0; +} + +static void __exit br2684_exit(void) +{ + struct net_device *net_dev; + struct br2684_dev *brdev; + struct br2684_vcc *brvcc; + deregister_atm_ioctl(&br2684_ioctl_ops); + +#ifdef CONFIG_PROC_FS + remove_proc_entry("br2684", atm_proc_root); +#endif + + while (!list_empty(&br2684_devs)) { + net_dev = list_entry_brdev(br2684_devs.next); + brdev = BRPRIV(net_dev); + while (!list_empty(&brdev->brvccs)) { + brvcc = list_entry_brvcc(brdev->brvccs.next); + br2684_close_vcc(brvcc); + } + + list_del(&brdev->br2684_devs); + unregister_netdev(net_dev); + free_netdev(net_dev); + } +} + +module_init(br2684_init); +module_exit(br2684_exit); + +MODULE_AUTHOR("Marcell GAL"); +MODULE_DESCRIPTION("RFC2684 bridged protocols over ATM/AAL5"); +MODULE_LICENSE("GPL"); diff --git a/net/atm/clip.c b/net/atm/clip.c new file mode 100644 index 0000000..5b5b963 --- /dev/null +++ b/net/atm/clip.c @@ -0,0 +1,1021 @@ +/* net/atm/clip.c - RFC1577 Classical IP over ATM */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + +#include +#include +#include /* for UINT_MAX */ +#include +#include +#include +#include +#include +#include +#include /* for some manifest constants */ +#include +#include +#include +#include +#include +#include +#include /* for net/route.h */ +#include /* for struct sockaddr_in */ +#include /* for IFF_UP */ +#include +#include +#include +#include +#include +#include +#include +#include /* for struct rtable and routing */ +#include /* icmp_send */ +#include /* for HZ */ +#include /* for htons etc. */ +#include /* save/restore_flags */ +#include +#include + +#include "common.h" +#include "resources.h" +#include + +static struct net_device *clip_devs; +static struct atm_vcc *atmarpd; +static struct neigh_table clip_tbl; +static struct timer_list idle_timer; + +static int to_atmarpd(enum atmarp_ctrl_type type, int itf, __be32 ip) +{ + struct sock *sk; + struct atmarp_ctrl *ctrl; + struct sk_buff *skb; + + pr_debug("to_atmarpd(%d)\n", type); + if (!atmarpd) + return -EUNATCH; + skb = alloc_skb(sizeof(struct atmarp_ctrl),GFP_ATOMIC); + if (!skb) + return -ENOMEM; + ctrl = (struct atmarp_ctrl *) skb_put(skb,sizeof(struct atmarp_ctrl)); + ctrl->type = type; + ctrl->itf_num = itf; + ctrl->ip = ip; + atm_force_charge(atmarpd, skb->truesize); + + sk = sk_atm(atmarpd); + skb_queue_tail(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); + return 0; +} + +static void link_vcc(struct clip_vcc *clip_vcc, struct atmarp_entry *entry) +{ + pr_debug("link_vcc %p to entry %p (neigh %p)\n", clip_vcc, entry, + entry->neigh); + clip_vcc->entry = entry; + clip_vcc->xoff = 0; /* @@@ may overrun buffer by one packet */ + clip_vcc->next = entry->vccs; + entry->vccs = clip_vcc; + entry->neigh->used = jiffies; +} + +static void unlink_clip_vcc(struct clip_vcc *clip_vcc) +{ + struct atmarp_entry *entry = clip_vcc->entry; + struct clip_vcc **walk; + + if (!entry) { + printk(KERN_CRIT "!clip_vcc->entry (clip_vcc %p)\n", clip_vcc); + return; + } + netif_tx_lock_bh(entry->neigh->dev); /* block clip_start_xmit() */ + entry->neigh->used = jiffies; + for (walk = &entry->vccs; *walk; walk = &(*walk)->next) + if (*walk == clip_vcc) { + int error; + + *walk = clip_vcc->next; /* atomic */ + clip_vcc->entry = NULL; + if (clip_vcc->xoff) + netif_wake_queue(entry->neigh->dev); + if (entry->vccs) + goto out; + entry->expires = jiffies - 1; + /* force resolution or expiration */ + error = neigh_update(entry->neigh, NULL, NUD_NONE, + NEIGH_UPDATE_F_ADMIN); + if (error) + printk(KERN_CRIT "unlink_clip_vcc: " + "neigh_update failed with %d\n", error); + goto out; + } + printk(KERN_CRIT "ATMARP: unlink_clip_vcc failed (entry %p, vcc " + "0x%p)\n", entry, clip_vcc); + out: + netif_tx_unlock_bh(entry->neigh->dev); +} + +/* The neighbour entry n->lock is held. */ +static int neigh_check_cb(struct neighbour *n) +{ + struct atmarp_entry *entry = NEIGH2ENTRY(n); + struct clip_vcc *cv; + + for (cv = entry->vccs; cv; cv = cv->next) { + unsigned long exp = cv->last_use + cv->idle_timeout; + + if (cv->idle_timeout && time_after(jiffies, exp)) { + pr_debug("releasing vcc %p->%p of entry %p\n", + cv, cv->vcc, entry); + vcc_release_async(cv->vcc, -ETIMEDOUT); + } + } + + if (entry->vccs || time_before(jiffies, entry->expires)) + return 0; + + if (atomic_read(&n->refcnt) > 1) { + struct sk_buff *skb; + + pr_debug("destruction postponed with ref %d\n", + atomic_read(&n->refcnt)); + + while ((skb = skb_dequeue(&n->arp_queue)) != NULL) + dev_kfree_skb(skb); + + return 0; + } + + pr_debug("expired neigh %p\n", n); + return 1; +} + +static void idle_timer_check(unsigned long dummy) +{ + write_lock(&clip_tbl.lock); + __neigh_for_each_release(&clip_tbl, neigh_check_cb); + mod_timer(&idle_timer, jiffies + CLIP_CHECK_INTERVAL * HZ); + write_unlock(&clip_tbl.lock); +} + +static int clip_arp_rcv(struct sk_buff *skb) +{ + struct atm_vcc *vcc; + + pr_debug("clip_arp_rcv\n"); + vcc = ATM_SKB(skb)->vcc; + if (!vcc || !atm_charge(vcc, skb->truesize)) { + dev_kfree_skb_any(skb); + return 0; + } + pr_debug("pushing to %p\n", vcc); + pr_debug("using %p\n", CLIP_VCC(vcc)->old_push); + CLIP_VCC(vcc)->old_push(vcc, skb); + return 0; +} + +static const unsigned char llc_oui[] = { + 0xaa, /* DSAP: non-ISO */ + 0xaa, /* SSAP: non-ISO */ + 0x03, /* Ctrl: Unnumbered Information Command PDU */ + 0x00, /* OUI: EtherType */ + 0x00, + 0x00 +}; + +static void clip_push(struct atm_vcc *vcc, struct sk_buff *skb) +{ + struct clip_vcc *clip_vcc = CLIP_VCC(vcc); + + pr_debug("clip push\n"); + if (!skb) { + pr_debug("removing VCC %p\n", clip_vcc); + if (clip_vcc->entry) + unlink_clip_vcc(clip_vcc); + clip_vcc->old_push(vcc, NULL); /* pass on the bad news */ + kfree(clip_vcc); + return; + } + atm_return(vcc, skb->truesize); + skb->dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : clip_devs; + /* clip_vcc->entry == NULL if we don't have an IP address yet */ + if (!skb->dev) { + dev_kfree_skb_any(skb); + return; + } + ATM_SKB(skb)->vcc = vcc; + skb_reset_mac_header(skb); + if (!clip_vcc->encap + || skb->len < RFC1483LLC_LEN + || memcmp(skb->data, llc_oui, sizeof (llc_oui))) + skb->protocol = htons(ETH_P_IP); + else { + skb->protocol = ((__be16 *) skb->data)[3]; + skb_pull(skb, RFC1483LLC_LEN); + if (skb->protocol == htons(ETH_P_ARP)) { + PRIV(skb->dev)->stats.rx_packets++; + PRIV(skb->dev)->stats.rx_bytes += skb->len; + clip_arp_rcv(skb); + return; + } + } + clip_vcc->last_use = jiffies; + PRIV(skb->dev)->stats.rx_packets++; + PRIV(skb->dev)->stats.rx_bytes += skb->len; + memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); + netif_rx(skb); +} + +/* + * Note: these spinlocks _must_not_ block on non-SMP. The only goal is that + * clip_pop is atomic with respect to the critical section in clip_start_xmit. + */ + +static void clip_pop(struct atm_vcc *vcc, struct sk_buff *skb) +{ + struct clip_vcc *clip_vcc = CLIP_VCC(vcc); + struct net_device *dev = skb->dev; + int old; + unsigned long flags; + + pr_debug("clip_pop(vcc %p)\n", vcc); + clip_vcc->old_pop(vcc, skb); + /* skb->dev == NULL in outbound ARP packets */ + if (!dev) + return; + spin_lock_irqsave(&PRIV(dev)->xoff_lock, flags); + if (atm_may_send(vcc, 0)) { + old = xchg(&clip_vcc->xoff, 0); + if (old) + netif_wake_queue(dev); + } + spin_unlock_irqrestore(&PRIV(dev)->xoff_lock, flags); +} + +static void clip_neigh_solicit(struct neighbour *neigh, struct sk_buff *skb) +{ + pr_debug("clip_neigh_solicit (neigh %p, skb %p)\n", neigh, skb); + to_atmarpd(act_need, PRIV(neigh->dev)->number, NEIGH2ENTRY(neigh)->ip); +} + +static void clip_neigh_error(struct neighbour *neigh, struct sk_buff *skb) +{ +#ifndef CONFIG_ATM_CLIP_NO_ICMP + icmp_send(skb, ICMP_DEST_UNREACH, ICMP_HOST_UNREACH, 0); +#endif + kfree_skb(skb); +} + +static struct neigh_ops clip_neigh_ops = { + .family = AF_INET, + .solicit = clip_neigh_solicit, + .error_report = clip_neigh_error, + .output = dev_queue_xmit, + .connected_output = dev_queue_xmit, + .hh_output = dev_queue_xmit, + .queue_xmit = dev_queue_xmit, +}; + +static int clip_constructor(struct neighbour *neigh) +{ + struct atmarp_entry *entry = NEIGH2ENTRY(neigh); + struct net_device *dev = neigh->dev; + struct in_device *in_dev; + struct neigh_parms *parms; + + pr_debug("clip_constructor (neigh %p, entry %p)\n", neigh, entry); + neigh->type = inet_addr_type(&init_net, entry->ip); + if (neigh->type != RTN_UNICAST) + return -EINVAL; + + rcu_read_lock(); + in_dev = __in_dev_get_rcu(dev); + if (!in_dev) { + rcu_read_unlock(); + return -EINVAL; + } + + parms = in_dev->arp_parms; + __neigh_parms_put(neigh->parms); + neigh->parms = neigh_parms_clone(parms); + rcu_read_unlock(); + + neigh->ops = &clip_neigh_ops; + neigh->output = neigh->nud_state & NUD_VALID ? + neigh->ops->connected_output : neigh->ops->output; + entry->neigh = neigh; + entry->vccs = NULL; + entry->expires = jiffies - 1; + return 0; +} + +static u32 clip_hash(const void *pkey, const struct net_device *dev) +{ + return jhash_2words(*(u32 *) pkey, dev->ifindex, clip_tbl.hash_rnd); +} + +static struct neigh_table clip_tbl = { + .family = AF_INET, + .entry_size = sizeof(struct neighbour)+sizeof(struct atmarp_entry), + .key_len = 4, + .hash = clip_hash, + .constructor = clip_constructor, + .id = "clip_arp_cache", + + /* parameters are copied from ARP ... */ + .parms = { + .tbl = &clip_tbl, + .base_reachable_time = 30 * HZ, + .retrans_time = 1 * HZ, + .gc_staletime = 60 * HZ, + .reachable_time = 30 * HZ, + .delay_probe_time = 5 * HZ, + .queue_len = 3, + .ucast_probes = 3, + .mcast_probes = 3, + .anycast_delay = 1 * HZ, + .proxy_delay = (8 * HZ) / 10, + .proxy_qlen = 64, + .locktime = 1 * HZ, + }, + .gc_interval = 30 * HZ, + .gc_thresh1 = 128, + .gc_thresh2 = 512, + .gc_thresh3 = 1024, +}; + +/* @@@ copy bh locking from arp.c -- need to bh-enable atm code before */ + +/* + * We play with the resolve flag: 0 and 1 have the usual meaning, but -1 means + * to allocate the neighbour entry but not to ask atmarpd for resolution. Also, + * don't increment the usage count. This is used to create entries in + * clip_setentry. + */ + +static int clip_encap(struct atm_vcc *vcc, int mode) +{ + CLIP_VCC(vcc)->encap = mode; + return 0; +} + +static int clip_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct clip_priv *clip_priv = PRIV(dev); + struct atmarp_entry *entry; + struct atm_vcc *vcc; + int old; + unsigned long flags; + + pr_debug("clip_start_xmit (skb %p)\n", skb); + if (!skb->dst) { + printk(KERN_ERR "clip_start_xmit: skb->dst == NULL\n"); + dev_kfree_skb(skb); + clip_priv->stats.tx_dropped++; + return 0; + } + if (!skb->dst->neighbour) { +#if 0 + skb->dst->neighbour = clip_find_neighbour(skb->dst, 1); + if (!skb->dst->neighbour) { + dev_kfree_skb(skb); /* lost that one */ + clip_priv->stats.tx_dropped++; + return 0; + } +#endif + printk(KERN_ERR "clip_start_xmit: NO NEIGHBOUR !\n"); + dev_kfree_skb(skb); + clip_priv->stats.tx_dropped++; + return 0; + } + entry = NEIGH2ENTRY(skb->dst->neighbour); + if (!entry->vccs) { + if (time_after(jiffies, entry->expires)) { + /* should be resolved */ + entry->expires = jiffies + ATMARP_RETRY_DELAY * HZ; + to_atmarpd(act_need, PRIV(dev)->number, entry->ip); + } + if (entry->neigh->arp_queue.qlen < ATMARP_MAX_UNRES_PACKETS) + skb_queue_tail(&entry->neigh->arp_queue, skb); + else { + dev_kfree_skb(skb); + clip_priv->stats.tx_dropped++; + } + return 0; + } + pr_debug("neigh %p, vccs %p\n", entry, entry->vccs); + ATM_SKB(skb)->vcc = vcc = entry->vccs->vcc; + pr_debug("using neighbour %p, vcc %p\n", skb->dst->neighbour, vcc); + if (entry->vccs->encap) { + void *here; + + here = skb_push(skb, RFC1483LLC_LEN); + memcpy(here, llc_oui, sizeof(llc_oui)); + ((__be16 *) here)[3] = skb->protocol; + } + atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); + ATM_SKB(skb)->atm_options = vcc->atm_options; + entry->vccs->last_use = jiffies; + pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, vcc, vcc->dev); + old = xchg(&entry->vccs->xoff, 1); /* assume XOFF ... */ + if (old) { + printk(KERN_WARNING "clip_start_xmit: XOFF->XOFF transition\n"); + return 0; + } + clip_priv->stats.tx_packets++; + clip_priv->stats.tx_bytes += skb->len; + vcc->send(vcc, skb); + if (atm_may_send(vcc, 0)) { + entry->vccs->xoff = 0; + return 0; + } + spin_lock_irqsave(&clip_priv->xoff_lock, flags); + netif_stop_queue(dev); /* XOFF -> throttle immediately */ + barrier(); + if (!entry->vccs->xoff) + netif_start_queue(dev); + /* Oh, we just raced with clip_pop. netif_start_queue should be + good enough, because nothing should really be asleep because + of the brief netif_stop_queue. If this isn't true or if it + changes, use netif_wake_queue instead. */ + spin_unlock_irqrestore(&clip_priv->xoff_lock, flags); + return 0; +} + +static struct net_device_stats *clip_get_stats(struct net_device *dev) +{ + return &PRIV(dev)->stats; +} + +static int clip_mkip(struct atm_vcc *vcc, int timeout) +{ + struct clip_vcc *clip_vcc; + struct sk_buff *skb; + struct sk_buff_head *rq; + unsigned long flags; + + if (!vcc->push) + return -EBADFD; + clip_vcc = kmalloc(sizeof(struct clip_vcc), GFP_KERNEL); + if (!clip_vcc) + return -ENOMEM; + pr_debug("mkip clip_vcc %p vcc %p\n", clip_vcc, vcc); + clip_vcc->vcc = vcc; + vcc->user_back = clip_vcc; + set_bit(ATM_VF_IS_CLIP, &vcc->flags); + clip_vcc->entry = NULL; + clip_vcc->xoff = 0; + clip_vcc->encap = 1; + clip_vcc->last_use = jiffies; + clip_vcc->idle_timeout = timeout * HZ; + clip_vcc->old_push = vcc->push; + clip_vcc->old_pop = vcc->pop; + vcc->push = clip_push; + vcc->pop = clip_pop; + + rq = &sk_atm(vcc)->sk_receive_queue; + + spin_lock_irqsave(&rq->lock, flags); + if (skb_queue_empty(rq)) { + skb = NULL; + } else { + /* NULL terminate the list. */ + rq->prev->next = NULL; + skb = rq->next; + } + rq->prev = rq->next = (struct sk_buff *)rq; + rq->qlen = 0; + spin_unlock_irqrestore(&rq->lock, flags); + + /* re-process everything received between connection setup and MKIP */ + while (skb) { + struct sk_buff *next = skb->next; + + skb->next = skb->prev = NULL; + if (!clip_devs) { + atm_return(vcc, skb->truesize); + kfree_skb(skb); + } else { + unsigned int len = skb->len; + + skb_get(skb); + clip_push(vcc, skb); + PRIV(skb->dev)->stats.rx_packets--; + PRIV(skb->dev)->stats.rx_bytes -= len; + kfree_skb(skb); + } + + skb = next; + } + return 0; +} + +static int clip_setentry(struct atm_vcc *vcc, __be32 ip) +{ + struct neighbour *neigh; + struct atmarp_entry *entry; + int error; + struct clip_vcc *clip_vcc; + struct flowi fl = { .nl_u = { .ip4_u = { .daddr = ip, .tos = 1}} }; + struct rtable *rt; + + if (vcc->push != clip_push) { + printk(KERN_WARNING "clip_setentry: non-CLIP VCC\n"); + return -EBADF; + } + clip_vcc = CLIP_VCC(vcc); + if (!ip) { + if (!clip_vcc->entry) { + printk(KERN_ERR "hiding hidden ATMARP entry\n"); + return 0; + } + pr_debug("setentry: remove\n"); + unlink_clip_vcc(clip_vcc); + return 0; + } + error = ip_route_output_key(&init_net, &rt, &fl); + if (error) + return error; + neigh = __neigh_lookup(&clip_tbl, &ip, rt->u.dst.dev, 1); + ip_rt_put(rt); + if (!neigh) + return -ENOMEM; + entry = NEIGH2ENTRY(neigh); + if (entry != clip_vcc->entry) { + if (!clip_vcc->entry) + pr_debug("setentry: add\n"); + else { + pr_debug("setentry: update\n"); + unlink_clip_vcc(clip_vcc); + } + link_vcc(clip_vcc, entry); + } + error = neigh_update(neigh, llc_oui, NUD_PERMANENT, + NEIGH_UPDATE_F_OVERRIDE | NEIGH_UPDATE_F_ADMIN); + neigh_release(neigh); + return error; +} + +static void clip_setup(struct net_device *dev) +{ + dev->hard_start_xmit = clip_start_xmit; + /* sg_xmit ... */ + dev->get_stats = clip_get_stats; + dev->type = ARPHRD_ATM; + dev->hard_header_len = RFC1483LLC_LEN; + dev->mtu = RFC1626_MTU; + dev->tx_queue_len = 100; /* "normal" queue (packets) */ + /* When using a "real" qdisc, the qdisc determines the queue */ + /* length. tx_queue_len is only used for the default case, */ + /* without any more elaborate queuing. 100 is a reasonable */ + /* compromise between decent burst-tolerance and protection */ + /* against memory hogs. */ +} + +static int clip_create(int number) +{ + struct net_device *dev; + struct clip_priv *clip_priv; + int error; + + if (number != -1) { + for (dev = clip_devs; dev; dev = PRIV(dev)->next) + if (PRIV(dev)->number == number) + return -EEXIST; + } else { + number = 0; + for (dev = clip_devs; dev; dev = PRIV(dev)->next) + if (PRIV(dev)->number >= number) + number = PRIV(dev)->number + 1; + } + dev = alloc_netdev(sizeof(struct clip_priv), "", clip_setup); + if (!dev) + return -ENOMEM; + clip_priv = PRIV(dev); + sprintf(dev->name, "atm%d", number); + spin_lock_init(&clip_priv->xoff_lock); + clip_priv->number = number; + error = register_netdev(dev); + if (error) { + free_netdev(dev); + return error; + } + clip_priv->next = clip_devs; + clip_devs = dev; + pr_debug("registered (net:%s)\n", dev->name); + return number; +} + +static int clip_device_event(struct notifier_block *this, unsigned long event, + void *arg) +{ + struct net_device *dev = arg; + + if (!net_eq(dev_net(dev), &init_net)) + return NOTIFY_DONE; + + if (event == NETDEV_UNREGISTER) { + neigh_ifdown(&clip_tbl, dev); + return NOTIFY_DONE; + } + + /* ignore non-CLIP devices */ + if (dev->type != ARPHRD_ATM || dev->hard_start_xmit != clip_start_xmit) + return NOTIFY_DONE; + + switch (event) { + case NETDEV_UP: + pr_debug("clip_device_event NETDEV_UP\n"); + to_atmarpd(act_up, PRIV(dev)->number, 0); + break; + case NETDEV_GOING_DOWN: + pr_debug("clip_device_event NETDEV_DOWN\n"); + to_atmarpd(act_down, PRIV(dev)->number, 0); + break; + case NETDEV_CHANGE: + case NETDEV_CHANGEMTU: + pr_debug("clip_device_event NETDEV_CHANGE*\n"); + to_atmarpd(act_change, PRIV(dev)->number, 0); + break; + } + return NOTIFY_DONE; +} + +static int clip_inet_event(struct notifier_block *this, unsigned long event, + void *ifa) +{ + struct in_device *in_dev; + + in_dev = ((struct in_ifaddr *)ifa)->ifa_dev; + /* + * Transitions are of the down-change-up type, so it's sufficient to + * handle the change on up. + */ + if (event != NETDEV_UP) + return NOTIFY_DONE; + return clip_device_event(this, NETDEV_CHANGE, in_dev->dev); +} + + +static struct notifier_block clip_dev_notifier = { + .notifier_call = clip_device_event, +}; + + + +static struct notifier_block clip_inet_notifier = { + .notifier_call = clip_inet_event, +}; + + + +static void atmarpd_close(struct atm_vcc *vcc) +{ + pr_debug("atmarpd_close\n"); + + rtnl_lock(); + atmarpd = NULL; + skb_queue_purge(&sk_atm(vcc)->sk_receive_queue); + rtnl_unlock(); + + pr_debug("(done)\n"); + module_put(THIS_MODULE); +} + + +static struct atmdev_ops atmarpd_dev_ops = { + .close = atmarpd_close +}; + + +static struct atm_dev atmarpd_dev = { + .ops = &atmarpd_dev_ops, + .type = "arpd", + .number = 999, + .lock = __SPIN_LOCK_UNLOCKED(atmarpd_dev.lock) +}; + + +static int atm_init_atmarp(struct atm_vcc *vcc) +{ + rtnl_lock(); + if (atmarpd) { + rtnl_unlock(); + return -EADDRINUSE; + } + + mod_timer(&idle_timer, jiffies+CLIP_CHECK_INTERVAL*HZ); + + atmarpd = vcc; + set_bit(ATM_VF_META,&vcc->flags); + set_bit(ATM_VF_READY,&vcc->flags); + /* allow replies and avoid getting closed if signaling dies */ + vcc->dev = &atmarpd_dev; + vcc_insert_socket(sk_atm(vcc)); + vcc->push = NULL; + vcc->pop = NULL; /* crash */ + vcc->push_oam = NULL; /* crash */ + rtnl_unlock(); + return 0; +} + +static int clip_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) +{ + struct atm_vcc *vcc = ATM_SD(sock); + int err = 0; + + switch (cmd) { + case SIOCMKCLIP: + case ATMARPD_CTRL: + case ATMARP_MKIP: + case ATMARP_SETENTRY: + case ATMARP_ENCAP: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + break; + default: + return -ENOIOCTLCMD; + } + + switch (cmd) { + case SIOCMKCLIP: + err = clip_create(arg); + break; + case ATMARPD_CTRL: + err = atm_init_atmarp(vcc); + if (!err) { + sock->state = SS_CONNECTED; + __module_get(THIS_MODULE); + } + break; + case ATMARP_MKIP: + err = clip_mkip(vcc, arg); + break; + case ATMARP_SETENTRY: + err = clip_setentry(vcc, (__force __be32)arg); + break; + case ATMARP_ENCAP: + err = clip_encap(vcc, arg); + break; + } + return err; +} + +static struct atm_ioctl clip_ioctl_ops = { + .owner = THIS_MODULE, + .ioctl = clip_ioctl, +}; + +#ifdef CONFIG_PROC_FS + +static void svc_addr(struct seq_file *seq, struct sockaddr_atmsvc *addr) +{ + static int code[] = { 1, 2, 10, 6, 1, 0 }; + static int e164[] = { 1, 8, 4, 6, 1, 0 }; + + if (*addr->sas_addr.pub) { + seq_printf(seq, "%s", addr->sas_addr.pub); + if (*addr->sas_addr.prv) + seq_putc(seq, '+'); + } else if (!*addr->sas_addr.prv) { + seq_printf(seq, "%s", "(none)"); + return; + } + if (*addr->sas_addr.prv) { + unsigned char *prv = addr->sas_addr.prv; + int *fields; + int i, j; + + fields = *prv == ATM_AFI_E164 ? e164 : code; + for (i = 0; fields[i]; i++) { + for (j = fields[i]; j; j--) + seq_printf(seq, "%02X", *prv++); + if (fields[i + 1]) + seq_putc(seq, '.'); + } + } +} + +/* This means the neighbour entry has no attached VCC objects. */ +#define SEQ_NO_VCC_TOKEN ((void *) 2) + +static void atmarp_info(struct seq_file *seq, struct net_device *dev, + struct atmarp_entry *entry, struct clip_vcc *clip_vcc) +{ + unsigned long exp; + char buf[17]; + int svc, llc, off; + + svc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || + (sk_atm(clip_vcc->vcc)->sk_family == AF_ATMSVC)); + + llc = ((clip_vcc == SEQ_NO_VCC_TOKEN) || clip_vcc->encap); + + if (clip_vcc == SEQ_NO_VCC_TOKEN) + exp = entry->neigh->used; + else + exp = clip_vcc->last_use; + + exp = (jiffies - exp) / HZ; + + seq_printf(seq, "%-6s%-4s%-4s%5ld ", + dev->name, svc ? "SVC" : "PVC", llc ? "LLC" : "NULL", exp); + + off = scnprintf(buf, sizeof(buf) - 1, "%d.%d.%d.%d", + NIPQUAD(entry->ip)); + while (off < 16) + buf[off++] = ' '; + buf[off] = '\0'; + seq_printf(seq, "%s", buf); + + if (clip_vcc == SEQ_NO_VCC_TOKEN) { + if (time_before(jiffies, entry->expires)) + seq_printf(seq, "(resolving)\n"); + else + seq_printf(seq, "(expired, ref %d)\n", + atomic_read(&entry->neigh->refcnt)); + } else if (!svc) { + seq_printf(seq, "%d.%d.%d\n", + clip_vcc->vcc->dev->number, + clip_vcc->vcc->vpi, clip_vcc->vcc->vci); + } else { + svc_addr(seq, &clip_vcc->vcc->remote); + seq_putc(seq, '\n'); + } +} + +struct clip_seq_state { + /* This member must be first. */ + struct neigh_seq_state ns; + + /* Local to clip specific iteration. */ + struct clip_vcc *vcc; +}; + +static struct clip_vcc *clip_seq_next_vcc(struct atmarp_entry *e, + struct clip_vcc *curr) +{ + if (!curr) { + curr = e->vccs; + if (!curr) + return SEQ_NO_VCC_TOKEN; + return curr; + } + if (curr == SEQ_NO_VCC_TOKEN) + return NULL; + + curr = curr->next; + + return curr; +} + +static void *clip_seq_vcc_walk(struct clip_seq_state *state, + struct atmarp_entry *e, loff_t * pos) +{ + struct clip_vcc *vcc = state->vcc; + + vcc = clip_seq_next_vcc(e, vcc); + if (vcc && pos != NULL) { + while (*pos) { + vcc = clip_seq_next_vcc(e, vcc); + if (!vcc) + break; + --(*pos); + } + } + state->vcc = vcc; + + return vcc; +} + +static void *clip_seq_sub_iter(struct neigh_seq_state *_state, + struct neighbour *n, loff_t * pos) +{ + struct clip_seq_state *state = (struct clip_seq_state *)_state; + + return clip_seq_vcc_walk(state, NEIGH2ENTRY(n), pos); +} + +static void *clip_seq_start(struct seq_file *seq, loff_t * pos) +{ + struct clip_seq_state *state = seq->private; + state->ns.neigh_sub_iter = clip_seq_sub_iter; + return neigh_seq_start(seq, pos, &clip_tbl, NEIGH_SEQ_NEIGH_ONLY); +} + +static int clip_seq_show(struct seq_file *seq, void *v) +{ + static char atm_arp_banner[] = + "IPitf TypeEncp Idle IP address ATM address\n"; + + if (v == SEQ_START_TOKEN) { + seq_puts(seq, atm_arp_banner); + } else { + struct clip_seq_state *state = seq->private; + struct neighbour *n = v; + struct clip_vcc *vcc = state->vcc; + + atmarp_info(seq, n->dev, NEIGH2ENTRY(n), vcc); + } + return 0; +} + +static const struct seq_operations arp_seq_ops = { + .start = clip_seq_start, + .next = neigh_seq_next, + .stop = neigh_seq_stop, + .show = clip_seq_show, +}; + +static int arp_seq_open(struct inode *inode, struct file *file) +{ + return seq_open_net(inode, file, &arp_seq_ops, + sizeof(struct clip_seq_state)); +} + +static const struct file_operations arp_seq_fops = { + .open = arp_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_net, + .owner = THIS_MODULE +}; +#endif + +static void atm_clip_exit_noproc(void); + +static int __init atm_clip_init(void) +{ + neigh_table_init_no_netlink(&clip_tbl); + + clip_tbl_hook = &clip_tbl; + register_atm_ioctl(&clip_ioctl_ops); + register_netdevice_notifier(&clip_dev_notifier); + register_inetaddr_notifier(&clip_inet_notifier); + + setup_timer(&idle_timer, idle_timer_check, 0); + +#ifdef CONFIG_PROC_FS + { + struct proc_dir_entry *p; + + p = proc_create("arp", S_IRUGO, atm_proc_root, &arp_seq_fops); + if (!p) { + printk(KERN_ERR "Unable to initialize " + "/proc/net/atm/arp\n"); + atm_clip_exit_noproc(); + return -ENOMEM; + } + } +#endif + + return 0; +} + +static void atm_clip_exit_noproc(void) +{ + struct net_device *dev, *next; + + unregister_inetaddr_notifier(&clip_inet_notifier); + unregister_netdevice_notifier(&clip_dev_notifier); + + deregister_atm_ioctl(&clip_ioctl_ops); + + /* First, stop the idle timer, so it stops banging + * on the table. + */ + del_timer_sync(&idle_timer); + + /* Next, purge the table, so that the device + * unregister loop below does not hang due to + * device references remaining in the table. + */ + neigh_ifdown(&clip_tbl, NULL); + + dev = clip_devs; + while (dev) { + next = PRIV(dev)->next; + unregister_netdev(dev); + free_netdev(dev); + dev = next; + } + + /* Now it is safe to fully shutdown whole table. */ + neigh_table_clear(&clip_tbl); + + clip_tbl_hook = NULL; +} + +static void __exit atm_clip_exit(void) +{ + remove_proc_entry("arp", atm_proc_root); + + atm_clip_exit_noproc(); +} + +module_init(atm_clip_init); +module_exit(atm_clip_exit); +MODULE_AUTHOR("Werner Almesberger"); +MODULE_DESCRIPTION("Classical/IP over ATM interface"); +MODULE_LICENSE("GPL"); diff --git a/net/atm/common.c b/net/atm/common.c new file mode 100644 index 0000000..d34edbe --- /dev/null +++ b/net/atm/common.c @@ -0,0 +1,818 @@ +/* net/atm/common.c - ATM sockets (common part for PVC and SVC) */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#include +#include +#include /* struct socket, struct proto_ops */ +#include /* ATM stuff */ +#include +#include /* SOL_SOCKET */ +#include /* error codes */ +#include +#include +#include +#include /* struct timeval */ +#include +#include +#include +#include /* struct sock */ + +#include +#include +#include + + +#include "resources.h" /* atm_find_dev */ +#include "common.h" /* prototypes */ +#include "protocols.h" /* atm_init_ */ +#include "addr.h" /* address registry */ +#include "signaling.h" /* for WAITING and sigd_attach */ + +struct hlist_head vcc_hash[VCC_HTABLE_SIZE]; +DEFINE_RWLOCK(vcc_sklist_lock); + +static void __vcc_insert_socket(struct sock *sk) +{ + struct atm_vcc *vcc = atm_sk(sk); + struct hlist_head *head = &vcc_hash[vcc->vci & + (VCC_HTABLE_SIZE - 1)]; + sk->sk_hash = vcc->vci & (VCC_HTABLE_SIZE - 1); + sk_add_node(sk, head); +} + +void vcc_insert_socket(struct sock *sk) +{ + write_lock_irq(&vcc_sklist_lock); + __vcc_insert_socket(sk); + write_unlock_irq(&vcc_sklist_lock); +} + +static void vcc_remove_socket(struct sock *sk) +{ + write_lock_irq(&vcc_sklist_lock); + sk_del_node_init(sk); + write_unlock_irq(&vcc_sklist_lock); +} + + +static struct sk_buff *alloc_tx(struct atm_vcc *vcc,unsigned int size) +{ + struct sk_buff *skb; + struct sock *sk = sk_atm(vcc); + + if (atomic_read(&sk->sk_wmem_alloc) && !atm_may_send(vcc, size)) { + pr_debug("Sorry: wmem_alloc = %d, size = %d, sndbuf = %d\n", + atomic_read(&sk->sk_wmem_alloc), size, + sk->sk_sndbuf); + return NULL; + } + while (!(skb = alloc_skb(size,GFP_KERNEL))) schedule(); + pr_debug("AlTx %d += %d\n", atomic_read(&sk->sk_wmem_alloc), + skb->truesize); + atomic_add(skb->truesize, &sk->sk_wmem_alloc); + return skb; +} + + +EXPORT_SYMBOL(vcc_hash); +EXPORT_SYMBOL(vcc_sklist_lock); +EXPORT_SYMBOL(vcc_insert_socket); + +static void vcc_sock_destruct(struct sock *sk) +{ + if (atomic_read(&sk->sk_rmem_alloc)) + printk(KERN_DEBUG "vcc_sock_destruct: rmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_rmem_alloc)); + + if (atomic_read(&sk->sk_wmem_alloc)) + printk(KERN_DEBUG "vcc_sock_destruct: wmem leakage (%d bytes) detected.\n", atomic_read(&sk->sk_wmem_alloc)); +} + +static void vcc_def_wakeup(struct sock *sk) +{ + read_lock(&sk->sk_callback_lock); + if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) + wake_up(sk->sk_sleep); + read_unlock(&sk->sk_callback_lock); +} + +static inline int vcc_writable(struct sock *sk) +{ + struct atm_vcc *vcc = atm_sk(sk); + + return (vcc->qos.txtp.max_sdu + + atomic_read(&sk->sk_wmem_alloc)) <= sk->sk_sndbuf; +} + +static void vcc_write_space(struct sock *sk) +{ + read_lock(&sk->sk_callback_lock); + + if (vcc_writable(sk)) { + if (sk->sk_sleep && waitqueue_active(sk->sk_sleep)) + wake_up_interruptible(sk->sk_sleep); + + sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT); + } + + read_unlock(&sk->sk_callback_lock); +} + +static struct proto vcc_proto = { + .name = "VCC", + .owner = THIS_MODULE, + .obj_size = sizeof(struct atm_vcc), +}; + +int vcc_create(struct net *net, struct socket *sock, int protocol, int family) +{ + struct sock *sk; + struct atm_vcc *vcc; + + sock->sk = NULL; + if (sock->type == SOCK_STREAM) + return -EINVAL; + sk = sk_alloc(net, family, GFP_KERNEL, &vcc_proto); + if (!sk) + return -ENOMEM; + sock_init_data(sock, sk); + sk->sk_state_change = vcc_def_wakeup; + sk->sk_write_space = vcc_write_space; + + vcc = atm_sk(sk); + vcc->dev = NULL; + memset(&vcc->local,0,sizeof(struct sockaddr_atmsvc)); + memset(&vcc->remote,0,sizeof(struct sockaddr_atmsvc)); + vcc->qos.txtp.max_sdu = 1 << 16; /* for meta VCs */ + atomic_set(&sk->sk_wmem_alloc, 0); + atomic_set(&sk->sk_rmem_alloc, 0); + vcc->push = NULL; + vcc->pop = NULL; + vcc->push_oam = NULL; + vcc->vpi = vcc->vci = 0; /* no VCI/VPI yet */ + vcc->atm_options = vcc->aal_options = 0; + sk->sk_destruct = vcc_sock_destruct; + return 0; +} + + +static void vcc_destroy_socket(struct sock *sk) +{ + struct atm_vcc *vcc = atm_sk(sk); + struct sk_buff *skb; + + set_bit(ATM_VF_CLOSE, &vcc->flags); + clear_bit(ATM_VF_READY, &vcc->flags); + if (vcc->dev) { + if (vcc->dev->ops->close) + vcc->dev->ops->close(vcc); + if (vcc->push) + vcc->push(vcc, NULL); /* atmarpd has no push */ + + while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { + atm_return(vcc,skb->truesize); + kfree_skb(skb); + } + + module_put(vcc->dev->ops->owner); + atm_dev_put(vcc->dev); + } + + vcc_remove_socket(sk); +} + + +int vcc_release(struct socket *sock) +{ + struct sock *sk = sock->sk; + + if (sk) { + lock_sock(sk); + vcc_destroy_socket(sock->sk); + release_sock(sk); + sock_put(sk); + } + + return 0; +} + + +void vcc_release_async(struct atm_vcc *vcc, int reply) +{ + struct sock *sk = sk_atm(vcc); + + set_bit(ATM_VF_CLOSE, &vcc->flags); + sk->sk_shutdown |= RCV_SHUTDOWN; + sk->sk_err = -reply; + clear_bit(ATM_VF_WAITING, &vcc->flags); + sk->sk_state_change(sk); +} + + +EXPORT_SYMBOL(vcc_release_async); + + +void atm_dev_release_vccs(struct atm_dev *dev) +{ + int i; + + write_lock_irq(&vcc_sklist_lock); + for (i = 0; i < VCC_HTABLE_SIZE; i++) { + struct hlist_head *head = &vcc_hash[i]; + struct hlist_node *node, *tmp; + struct sock *s; + struct atm_vcc *vcc; + + sk_for_each_safe(s, node, tmp, head) { + vcc = atm_sk(s); + if (vcc->dev == dev) { + vcc_release_async(vcc, -EPIPE); + sk_del_node_init(s); + } + } + } + write_unlock_irq(&vcc_sklist_lock); +} + + +static int adjust_tp(struct atm_trafprm *tp,unsigned char aal) +{ + int max_sdu; + + if (!tp->traffic_class) return 0; + switch (aal) { + case ATM_AAL0: + max_sdu = ATM_CELL_SIZE-1; + break; + case ATM_AAL34: + max_sdu = ATM_MAX_AAL34_PDU; + break; + default: + printk(KERN_WARNING "ATM: AAL problems ... " + "(%d)\n",aal); + /* fall through */ + case ATM_AAL5: + max_sdu = ATM_MAX_AAL5_PDU; + } + if (!tp->max_sdu) tp->max_sdu = max_sdu; + else if (tp->max_sdu > max_sdu) return -EINVAL; + if (!tp->max_cdv) tp->max_cdv = ATM_MAX_CDV; + return 0; +} + + +static int check_ci(const struct atm_vcc *vcc, short vpi, int vci) +{ + struct hlist_head *head = &vcc_hash[vci & + (VCC_HTABLE_SIZE - 1)]; + struct hlist_node *node; + struct sock *s; + struct atm_vcc *walk; + + sk_for_each(s, node, head) { + walk = atm_sk(s); + if (walk->dev != vcc->dev) + continue; + if (test_bit(ATM_VF_ADDR, &walk->flags) && walk->vpi == vpi && + walk->vci == vci && ((walk->qos.txtp.traffic_class != + ATM_NONE && vcc->qos.txtp.traffic_class != ATM_NONE) || + (walk->qos.rxtp.traffic_class != ATM_NONE && + vcc->qos.rxtp.traffic_class != ATM_NONE))) + return -EADDRINUSE; + } + + /* allow VCCs with same VPI/VCI iff they don't collide on + TX/RX (but we may refuse such sharing for other reasons, + e.g. if protocol requires to have both channels) */ + + return 0; +} + + +static int find_ci(const struct atm_vcc *vcc, short *vpi, int *vci) +{ + static short p; /* poor man's per-device cache */ + static int c; + short old_p; + int old_c; + int err; + + if (*vpi != ATM_VPI_ANY && *vci != ATM_VCI_ANY) { + err = check_ci(vcc, *vpi, *vci); + return err; + } + /* last scan may have left values out of bounds for current device */ + if (*vpi != ATM_VPI_ANY) + p = *vpi; + else if (p >= 1 << vcc->dev->ci_range.vpi_bits) + p = 0; + if (*vci != ATM_VCI_ANY) + c = *vci; + else if (c < ATM_NOT_RSV_VCI || c >= 1 << vcc->dev->ci_range.vci_bits) + c = ATM_NOT_RSV_VCI; + old_p = p; + old_c = c; + do { + if (!check_ci(vcc, p, c)) { + *vpi = p; + *vci = c; + return 0; + } + if (*vci == ATM_VCI_ANY) { + c++; + if (c >= 1 << vcc->dev->ci_range.vci_bits) + c = ATM_NOT_RSV_VCI; + } + if ((c == ATM_NOT_RSV_VCI || *vci != ATM_VCI_ANY) && + *vpi == ATM_VPI_ANY) { + p++; + if (p >= 1 << vcc->dev->ci_range.vpi_bits) p = 0; + } + } + while (old_p != p || old_c != c); + return -EADDRINUSE; +} + + +static int __vcc_connect(struct atm_vcc *vcc, struct atm_dev *dev, short vpi, + int vci) +{ + struct sock *sk = sk_atm(vcc); + int error; + + if ((vpi != ATM_VPI_UNSPEC && vpi != ATM_VPI_ANY && + vpi >> dev->ci_range.vpi_bits) || (vci != ATM_VCI_UNSPEC && + vci != ATM_VCI_ANY && vci >> dev->ci_range.vci_bits)) + return -EINVAL; + if (vci > 0 && vci < ATM_NOT_RSV_VCI && !capable(CAP_NET_BIND_SERVICE)) + return -EPERM; + error = -ENODEV; + if (!try_module_get(dev->ops->owner)) + return error; + vcc->dev = dev; + write_lock_irq(&vcc_sklist_lock); + if (test_bit(ATM_DF_REMOVED, &dev->flags) || + (error = find_ci(vcc, &vpi, &vci))) { + write_unlock_irq(&vcc_sklist_lock); + goto fail_module_put; + } + vcc->vpi = vpi; + vcc->vci = vci; + __vcc_insert_socket(sk); + write_unlock_irq(&vcc_sklist_lock); + switch (vcc->qos.aal) { + case ATM_AAL0: + error = atm_init_aal0(vcc); + vcc->stats = &dev->stats.aal0; + break; + case ATM_AAL34: + error = atm_init_aal34(vcc); + vcc->stats = &dev->stats.aal34; + break; + case ATM_NO_AAL: + /* ATM_AAL5 is also used in the "0 for default" case */ + vcc->qos.aal = ATM_AAL5; + /* fall through */ + case ATM_AAL5: + error = atm_init_aal5(vcc); + vcc->stats = &dev->stats.aal5; + break; + default: + error = -EPROTOTYPE; + } + if (!error) error = adjust_tp(&vcc->qos.txtp,vcc->qos.aal); + if (!error) error = adjust_tp(&vcc->qos.rxtp,vcc->qos.aal); + if (error) + goto fail; + pr_debug("VCC %d.%d, AAL %d\n",vpi,vci,vcc->qos.aal); + pr_debug(" TX: %d, PCR %d..%d, SDU %d\n",vcc->qos.txtp.traffic_class, + vcc->qos.txtp.min_pcr,vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu); + pr_debug(" RX: %d, PCR %d..%d, SDU %d\n",vcc->qos.rxtp.traffic_class, + vcc->qos.rxtp.min_pcr,vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu); + + if (dev->ops->open) { + if ((error = dev->ops->open(vcc))) + goto fail; + } + return 0; + +fail: + vcc_remove_socket(sk); +fail_module_put: + module_put(dev->ops->owner); + /* ensure we get dev module ref count correct */ + vcc->dev = NULL; + return error; +} + + +int vcc_connect(struct socket *sock, int itf, short vpi, int vci) +{ + struct atm_dev *dev; + struct atm_vcc *vcc = ATM_SD(sock); + int error; + + pr_debug("vcc_connect (vpi %d, vci %d)\n",vpi,vci); + if (sock->state == SS_CONNECTED) + return -EISCONN; + if (sock->state != SS_UNCONNECTED) + return -EINVAL; + if (!(vpi || vci)) + return -EINVAL; + + if (vpi != ATM_VPI_UNSPEC && vci != ATM_VCI_UNSPEC) + clear_bit(ATM_VF_PARTIAL,&vcc->flags); + else + if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) + return -EINVAL; + pr_debug("vcc_connect (TX: cl %d,bw %d-%d,sdu %d; " + "RX: cl %d,bw %d-%d,sdu %d,AAL %s%d)\n", + vcc->qos.txtp.traffic_class,vcc->qos.txtp.min_pcr, + vcc->qos.txtp.max_pcr,vcc->qos.txtp.max_sdu, + vcc->qos.rxtp.traffic_class,vcc->qos.rxtp.min_pcr, + vcc->qos.rxtp.max_pcr,vcc->qos.rxtp.max_sdu, + vcc->qos.aal == ATM_AAL5 ? "" : vcc->qos.aal == ATM_AAL0 ? "" : + " ??? code ",vcc->qos.aal == ATM_AAL0 ? 0 : vcc->qos.aal); + if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) + return -EBADFD; + if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || + vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) + return -EINVAL; + if (likely(itf != ATM_ITF_ANY)) { + dev = try_then_request_module(atm_dev_lookup(itf), "atm-device-%d", itf); + } else { + dev = NULL; + mutex_lock(&atm_dev_mutex); + if (!list_empty(&atm_devs)) { + dev = list_entry(atm_devs.next, struct atm_dev, dev_list); + atm_dev_hold(dev); + } + mutex_unlock(&atm_dev_mutex); + } + if (!dev) + return -ENODEV; + error = __vcc_connect(vcc, dev, vpi, vci); + if (error) { + atm_dev_put(dev); + return error; + } + if (vpi == ATM_VPI_UNSPEC || vci == ATM_VCI_UNSPEC) + set_bit(ATM_VF_PARTIAL,&vcc->flags); + if (test_bit(ATM_VF_READY,&ATM_SD(sock)->flags)) + sock->state = SS_CONNECTED; + return 0; +} + + +int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, + size_t size, int flags) +{ + struct sock *sk = sock->sk; + struct atm_vcc *vcc; + struct sk_buff *skb; + int copied, error = -EINVAL; + + if (sock->state != SS_CONNECTED) + return -ENOTCONN; + if (flags & ~MSG_DONTWAIT) /* only handle MSG_DONTWAIT */ + return -EOPNOTSUPP; + vcc = ATM_SD(sock); + if (test_bit(ATM_VF_RELEASED,&vcc->flags) || + test_bit(ATM_VF_CLOSE,&vcc->flags) || + !test_bit(ATM_VF_READY, &vcc->flags)) + return 0; + + skb = skb_recv_datagram(sk, flags, flags & MSG_DONTWAIT, &error); + if (!skb) + return error; + + copied = skb->len; + if (copied > size) { + copied = size; + msg->msg_flags |= MSG_TRUNC; + } + + error = skb_copy_datagram_iovec(skb, 0, msg->msg_iov, copied); + if (error) + return error; + sock_recv_timestamp(msg, sk, skb); + pr_debug("RcvM %d -= %d\n", atomic_read(&sk->sk_rmem_alloc), skb->truesize); + atm_return(vcc, skb->truesize); + skb_free_datagram(sk, skb); + return copied; +} + + +int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, + size_t total_len) +{ + struct sock *sk = sock->sk; + DEFINE_WAIT(wait); + struct atm_vcc *vcc; + struct sk_buff *skb; + int eff,error; + const void __user *buff; + int size; + + lock_sock(sk); + if (sock->state != SS_CONNECTED) { + error = -ENOTCONN; + goto out; + } + if (m->msg_name) { + error = -EISCONN; + goto out; + } + if (m->msg_iovlen != 1) { + error = -ENOSYS; /* fix this later @@@ */ + goto out; + } + buff = m->msg_iov->iov_base; + size = m->msg_iov->iov_len; + vcc = ATM_SD(sock); + if (test_bit(ATM_VF_RELEASED, &vcc->flags) || + test_bit(ATM_VF_CLOSE, &vcc->flags) || + !test_bit(ATM_VF_READY, &vcc->flags)) { + error = -EPIPE; + send_sig(SIGPIPE, current, 0); + goto out; + } + if (!size) { + error = 0; + goto out; + } + if (size < 0 || size > vcc->qos.txtp.max_sdu) { + error = -EMSGSIZE; + goto out; + } + + eff = (size+3) & ~3; /* align to word boundary */ + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + error = 0; + while (!(skb = alloc_tx(vcc,eff))) { + if (m->msg_flags & MSG_DONTWAIT) { + error = -EAGAIN; + break; + } + schedule(); + if (signal_pending(current)) { + error = -ERESTARTSYS; + break; + } + if (test_bit(ATM_VF_RELEASED,&vcc->flags) || + test_bit(ATM_VF_CLOSE,&vcc->flags) || + !test_bit(ATM_VF_READY,&vcc->flags)) { + error = -EPIPE; + send_sig(SIGPIPE, current, 0); + break; + } + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + if (error) + goto out; + skb->dev = NULL; /* for paths shared with net_device interfaces */ + ATM_SKB(skb)->atm_options = vcc->atm_options; + if (copy_from_user(skb_put(skb,size),buff,size)) { + kfree_skb(skb); + error = -EFAULT; + goto out; + } + if (eff != size) memset(skb->data+size,0,eff-size); + error = vcc->dev->ops->send(vcc,skb); + error = error ? error : size; +out: + release_sock(sk); + return error; +} + + +unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait) +{ + struct sock *sk = sock->sk; + struct atm_vcc *vcc; + unsigned int mask; + + poll_wait(file, sk->sk_sleep, wait); + mask = 0; + + vcc = ATM_SD(sock); + + /* exceptional events */ + if (sk->sk_err) + mask = POLLERR; + + if (test_bit(ATM_VF_RELEASED, &vcc->flags) || + test_bit(ATM_VF_CLOSE, &vcc->flags)) + mask |= POLLHUP; + + /* readable? */ + if (!skb_queue_empty(&sk->sk_receive_queue)) + mask |= POLLIN | POLLRDNORM; + + /* writable? */ + if (sock->state == SS_CONNECTING && + test_bit(ATM_VF_WAITING, &vcc->flags)) + return mask; + + if (vcc->qos.txtp.traffic_class != ATM_NONE && + vcc_writable(sk)) + mask |= POLLOUT | POLLWRNORM | POLLWRBAND; + + return mask; +} + + +static int atm_change_qos(struct atm_vcc *vcc,struct atm_qos *qos) +{ + int error; + + /* + * Don't let the QoS change the already connected AAL type nor the + * traffic class. + */ + if (qos->aal != vcc->qos.aal || + qos->rxtp.traffic_class != vcc->qos.rxtp.traffic_class || + qos->txtp.traffic_class != vcc->qos.txtp.traffic_class) + return -EINVAL; + error = adjust_tp(&qos->txtp,qos->aal); + if (!error) error = adjust_tp(&qos->rxtp,qos->aal); + if (error) return error; + if (!vcc->dev->ops->change_qos) return -EOPNOTSUPP; + if (sk_atm(vcc)->sk_family == AF_ATMPVC) + return vcc->dev->ops->change_qos(vcc,qos,ATM_MF_SET); + return svc_change_qos(vcc,qos); +} + + +static int check_tp(const struct atm_trafprm *tp) +{ + /* @@@ Should be merged with adjust_tp */ + if (!tp->traffic_class || tp->traffic_class == ATM_ANYCLASS) return 0; + if (tp->traffic_class != ATM_UBR && !tp->min_pcr && !tp->pcr && + !tp->max_pcr) return -EINVAL; + if (tp->min_pcr == ATM_MAX_PCR) return -EINVAL; + if (tp->min_pcr && tp->max_pcr && tp->max_pcr != ATM_MAX_PCR && + tp->min_pcr > tp->max_pcr) return -EINVAL; + /* + * We allow pcr to be outside [min_pcr,max_pcr], because later + * adjustment may still push it in the valid range. + */ + return 0; +} + + +static int check_qos(const struct atm_qos *qos) +{ + int error; + + if (!qos->txtp.traffic_class && !qos->rxtp.traffic_class) + return -EINVAL; + if (qos->txtp.traffic_class != qos->rxtp.traffic_class && + qos->txtp.traffic_class && qos->rxtp.traffic_class && + qos->txtp.traffic_class != ATM_ANYCLASS && + qos->rxtp.traffic_class != ATM_ANYCLASS) return -EINVAL; + error = check_tp(&qos->txtp); + if (error) return error; + return check_tp(&qos->rxtp); +} + +int vcc_setsockopt(struct socket *sock, int level, int optname, + char __user *optval, int optlen) +{ + struct atm_vcc *vcc; + unsigned long value; + int error; + + if (__SO_LEVEL_MATCH(optname, level) && optlen != __SO_SIZE(optname)) + return -EINVAL; + + vcc = ATM_SD(sock); + switch (optname) { + case SO_ATMQOS: + { + struct atm_qos qos; + + if (copy_from_user(&qos,optval,sizeof(qos))) + return -EFAULT; + error = check_qos(&qos); + if (error) return error; + if (sock->state == SS_CONNECTED) + return atm_change_qos(vcc,&qos); + if (sock->state != SS_UNCONNECTED) + return -EBADFD; + vcc->qos = qos; + set_bit(ATM_VF_HASQOS,&vcc->flags); + return 0; + } + case SO_SETCLP: + if (get_user(value,(unsigned long __user *)optval)) + return -EFAULT; + if (value) vcc->atm_options |= ATM_ATMOPT_CLP; + else vcc->atm_options &= ~ATM_ATMOPT_CLP; + return 0; + default: + if (level == SOL_SOCKET) return -EINVAL; + break; + } + if (!vcc->dev || !vcc->dev->ops->setsockopt) return -EINVAL; + return vcc->dev->ops->setsockopt(vcc,level,optname,optval,optlen); +} + + +int vcc_getsockopt(struct socket *sock, int level, int optname, + char __user *optval, int __user *optlen) +{ + struct atm_vcc *vcc; + int len; + + if (get_user(len, optlen)) + return -EFAULT; + if (__SO_LEVEL_MATCH(optname, level) && len != __SO_SIZE(optname)) + return -EINVAL; + + vcc = ATM_SD(sock); + switch (optname) { + case SO_ATMQOS: + if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) + return -EINVAL; + return copy_to_user(optval,&vcc->qos,sizeof(vcc->qos)) ? + -EFAULT : 0; + case SO_SETCLP: + return put_user(vcc->atm_options & ATM_ATMOPT_CLP ? 1 : + 0,(unsigned long __user *)optval) ? -EFAULT : 0; + case SO_ATMPVC: + { + struct sockaddr_atmpvc pvc; + + if (!vcc->dev || + !test_bit(ATM_VF_ADDR,&vcc->flags)) + return -ENOTCONN; + pvc.sap_family = AF_ATMPVC; + pvc.sap_addr.itf = vcc->dev->number; + pvc.sap_addr.vpi = vcc->vpi; + pvc.sap_addr.vci = vcc->vci; + return copy_to_user(optval,&pvc,sizeof(pvc)) ? + -EFAULT : 0; + } + default: + if (level == SOL_SOCKET) return -EINVAL; + break; + } + if (!vcc->dev || !vcc->dev->ops->getsockopt) return -EINVAL; + return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len); +} + +static int __init atm_init(void) +{ + int error; + + if ((error = proto_register(&vcc_proto, 0)) < 0) + goto out; + + if ((error = atmpvc_init()) < 0) { + printk(KERN_ERR "atmpvc_init() failed with %d\n", error); + goto out_unregister_vcc_proto; + } + if ((error = atmsvc_init()) < 0) { + printk(KERN_ERR "atmsvc_init() failed with %d\n", error); + goto out_atmpvc_exit; + } + if ((error = atm_proc_init()) < 0) { + printk(KERN_ERR "atm_proc_init() failed with %d\n",error); + goto out_atmsvc_exit; + } + if ((error = atm_sysfs_init()) < 0) { + printk(KERN_ERR "atm_sysfs_init() failed with %d\n",error); + goto out_atmproc_exit; + } +out: + return error; +out_atmproc_exit: + atm_proc_exit(); +out_atmsvc_exit: + atmsvc_exit(); +out_atmpvc_exit: + atmsvc_exit(); +out_unregister_vcc_proto: + proto_unregister(&vcc_proto); + goto out; +} + +static void __exit atm_exit(void) +{ + atm_proc_exit(); + atm_sysfs_exit(); + atmsvc_exit(); + atmpvc_exit(); + proto_unregister(&vcc_proto); +} + +subsys_initcall(atm_init); + +module_exit(atm_exit); + +MODULE_LICENSE("GPL"); +MODULE_ALIAS_NETPROTO(PF_ATMPVC); +MODULE_ALIAS_NETPROTO(PF_ATMSVC); diff --git a/net/atm/common.h b/net/atm/common.h new file mode 100644 index 0000000..16f32c1 --- /dev/null +++ b/net/atm/common.h @@ -0,0 +1,54 @@ +/* net/atm/common.h - ATM sockets (common part for PVC and SVC) */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#ifndef NET_ATM_COMMON_H +#define NET_ATM_COMMON_H + +#include +#include /* for poll_table */ + + +int vcc_create(struct net *net, struct socket *sock, int protocol, int family); +int vcc_release(struct socket *sock); +int vcc_connect(struct socket *sock, int itf, short vpi, int vci); +int vcc_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *msg, + size_t size, int flags); +int vcc_sendmsg(struct kiocb *iocb, struct socket *sock, struct msghdr *m, + size_t total_len); +unsigned int vcc_poll(struct file *file, struct socket *sock, poll_table *wait); +int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg); +int vcc_setsockopt(struct socket *sock, int level, int optname, + char __user *optval, int optlen); +int vcc_getsockopt(struct socket *sock, int level, int optname, + char __user *optval, int __user *optlen); + +int atmpvc_init(void); +void atmpvc_exit(void); +int atmsvc_init(void); +void atmsvc_exit(void); +int atm_sysfs_init(void); +void atm_sysfs_exit(void); + +#ifdef CONFIG_PROC_FS +int atm_proc_init(void); +void atm_proc_exit(void); +#else +static inline int atm_proc_init(void) +{ + return 0; +} + +static inline void atm_proc_exit(void) +{ + /* nothing */ +} +#endif /* CONFIG_PROC_FS */ + +/* SVC */ +int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos); + +void atm_dev_release_vccs(struct atm_dev *dev); + +#endif diff --git a/net/atm/ioctl.c b/net/atm/ioctl.c new file mode 100644 index 0000000..7afd8e7 --- /dev/null +++ b/net/atm/ioctl.c @@ -0,0 +1,162 @@ +/* ATM ioctl handling */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ +/* 2003 John Levon */ + + +#include +#include +#include /* struct socket, struct proto_ops */ +#include /* ATM stuff */ +#include +#include /* CLIP_*ENCAP */ +#include /* manifest constants */ +#include +#include /* for ioctls */ +#include +#include +#include +#include +#include +#include + +#include "resources.h" +#include "signaling.h" /* for WAITING and sigd_attach */ +#include "common.h" + + +static DEFINE_MUTEX(ioctl_mutex); +static LIST_HEAD(ioctl_list); + + +void register_atm_ioctl(struct atm_ioctl *ioctl) +{ + mutex_lock(&ioctl_mutex); + list_add_tail(&ioctl->list, &ioctl_list); + mutex_unlock(&ioctl_mutex); +} + +void deregister_atm_ioctl(struct atm_ioctl *ioctl) +{ + mutex_lock(&ioctl_mutex); + list_del(&ioctl->list); + mutex_unlock(&ioctl_mutex); +} + +EXPORT_SYMBOL(register_atm_ioctl); +EXPORT_SYMBOL(deregister_atm_ioctl); + +int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) +{ + struct sock *sk = sock->sk; + struct atm_vcc *vcc; + int error; + struct list_head * pos; + void __user *argp = (void __user *)arg; + + vcc = ATM_SD(sock); + switch (cmd) { + case SIOCOUTQ: + if (sock->state != SS_CONNECTED || + !test_bit(ATM_VF_READY, &vcc->flags)) { + error = -EINVAL; + goto done; + } + error = put_user(sk->sk_sndbuf - + atomic_read(&sk->sk_wmem_alloc), + (int __user *) argp) ? -EFAULT : 0; + goto done; + case SIOCINQ: + { + struct sk_buff *skb; + + if (sock->state != SS_CONNECTED) { + error = -EINVAL; + goto done; + } + skb = skb_peek(&sk->sk_receive_queue); + error = put_user(skb ? skb->len : 0, + (int __user *)argp) ? -EFAULT : 0; + goto done; + } + case SIOCGSTAMP: /* borrowed from IP */ + error = sock_get_timestamp(sk, argp); + goto done; + case SIOCGSTAMPNS: /* borrowed from IP */ + error = sock_get_timestampns(sk, argp); + goto done; + case ATM_SETSC: + printk(KERN_WARNING "ATM_SETSC is obsolete\n"); + error = 0; + goto done; + case ATMSIGD_CTRL: + if (!capable(CAP_NET_ADMIN)) { + error = -EPERM; + goto done; + } + /* + * The user/kernel protocol for exchanging signalling + * info uses kernel pointers as opaque references, + * so the holder of the file descriptor can scribble + * on the kernel... so we should make sure that we + * have the same privledges that /proc/kcore needs + */ + if (!capable(CAP_SYS_RAWIO)) { + error = -EPERM; + goto done; + } + error = sigd_attach(vcc); + if (!error) + sock->state = SS_CONNECTED; + goto done; + case ATM_SETBACKEND: + case ATM_NEWBACKENDIF: + { + atm_backend_t backend; + error = get_user(backend, (atm_backend_t __user *) argp); + if (error) + goto done; + switch (backend) { + case ATM_BACKEND_PPP: + request_module("pppoatm"); + break; + case ATM_BACKEND_BR2684: + request_module("br2684"); + break; + } + } + break; + case ATMMPC_CTRL: + case ATMMPC_DATA: + request_module("mpoa"); + break; + case ATMARPD_CTRL: + request_module("clip"); + break; + case ATMLEC_CTRL: + request_module("lec"); + break; + } + + error = -ENOIOCTLCMD; + + mutex_lock(&ioctl_mutex); + list_for_each(pos, &ioctl_list) { + struct atm_ioctl * ic = list_entry(pos, struct atm_ioctl, list); + if (try_module_get(ic->owner)) { + error = ic->ioctl(sock, cmd, arg); + module_put(ic->owner); + if (error != -ENOIOCTLCMD) + break; + } + } + mutex_unlock(&ioctl_mutex); + + if (error != -ENOIOCTLCMD) + goto done; + + error = atm_dev_ioctl(cmd, argp); + +done: + return error; +} diff --git a/net/atm/lec.c b/net/atm/lec.c new file mode 100644 index 0000000..8f701cd --- /dev/null +++ b/net/atm/lec.c @@ -0,0 +1,2488 @@ +/* + * lec.c: Lan Emulation driver + * + * Marko Kiiskila + */ + +#include +#include +#include + +/* We are ethernet device */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* TokenRing if needed */ +#ifdef CONFIG_TR +#include +#endif + +/* And atm device */ +#include +#include + +/* Proxy LEC knows about bridging */ +#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) +#include +#include "../bridge/br_private.h" + +static unsigned char bridge_ula_lec[] = { 0x01, 0x80, 0xc2, 0x00, 0x00 }; +#endif + +/* Modular too */ +#include +#include + +#include "lec.h" +#include "lec_arpc.h" +#include "resources.h" + +#define DUMP_PACKETS 0 /* + * 0 = None, + * 1 = 30 first bytes + * 2 = Whole packet + */ + +#define LEC_UNRES_QUE_LEN 8 /* + * number of tx packets to queue for a + * single destination while waiting for SVC + */ + +static int lec_open(struct net_device *dev); +static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev); +static int lec_close(struct net_device *dev); +static struct net_device_stats *lec_get_stats(struct net_device *dev); +static void lec_init(struct net_device *dev); +static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, + const unsigned char *mac_addr); +static int lec_arp_remove(struct lec_priv *priv, + struct lec_arp_table *to_remove); +/* LANE2 functions */ +static void lane2_associate_ind(struct net_device *dev, const u8 *mac_address, + const u8 *tlvs, u32 sizeoftlvs); +static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, + u8 **tlvs, u32 *sizeoftlvs); +static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, + const u8 *tlvs, u32 sizeoftlvs); + +static int lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, + unsigned long permanent); +static void lec_arp_check_empties(struct lec_priv *priv, + struct atm_vcc *vcc, struct sk_buff *skb); +static void lec_arp_destroy(struct lec_priv *priv); +static void lec_arp_init(struct lec_priv *priv); +static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, + const unsigned char *mac_to_find, + int is_rdesc, + struct lec_arp_table **ret_entry); +static void lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, + const unsigned char *atm_addr, unsigned long remoteflag, + unsigned int targetless_le_arp); +static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id); +static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc); +static void lec_set_flush_tran_id(struct lec_priv *priv, + const unsigned char *atm_addr, + unsigned long tran_id); +static void lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, + struct atm_vcc *vcc, + void (*old_push) (struct atm_vcc *vcc, + struct sk_buff *skb)); +static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc); + +/* must be done under lec_arp_lock */ +static inline void lec_arp_hold(struct lec_arp_table *entry) +{ + atomic_inc(&entry->usage); +} + +static inline void lec_arp_put(struct lec_arp_table *entry) +{ + if (atomic_dec_and_test(&entry->usage)) + kfree(entry); +} + + +static struct lane2_ops lane2_ops = { + lane2_resolve, /* resolve, spec 3.1.3 */ + lane2_associate_req, /* associate_req, spec 3.1.4 */ + NULL /* associate indicator, spec 3.1.5 */ +}; + +static unsigned char bus_mac[ETH_ALEN] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; + +/* Device structures */ +static struct net_device *dev_lec[MAX_LEC_ITF]; + +#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) +static void lec_handle_bridge(struct sk_buff *skb, struct net_device *dev) +{ + struct ethhdr *eth; + char *buff; + struct lec_priv *priv; + + /* + * Check if this is a BPDU. If so, ask zeppelin to send + * LE_TOPOLOGY_REQUEST with the same value of Topology Change bit + * as the Config BPDU has + */ + eth = (struct ethhdr *)skb->data; + buff = skb->data + skb->dev->hard_header_len; + if (*buff++ == 0x42 && *buff++ == 0x42 && *buff++ == 0x03) { + struct sock *sk; + struct sk_buff *skb2; + struct atmlec_msg *mesg; + + skb2 = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); + if (skb2 == NULL) + return; + skb2->len = sizeof(struct atmlec_msg); + mesg = (struct atmlec_msg *)skb2->data; + mesg->type = l_topology_change; + buff += 4; + mesg->content.normal.flag = *buff & 0x01; /* 0x01 is topology change */ + + priv = (struct lec_priv *)dev->priv; + atm_force_charge(priv->lecd, skb2->truesize); + sk = sk_atm(priv->lecd); + skb_queue_tail(&sk->sk_receive_queue, skb2); + sk->sk_data_ready(sk, skb2->len); + } + + return; +} +#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ + +/* + * Modelled after tr_type_trans + * All multicast and ARE or STE frames go to BUS. + * Non source routed frames go by destination address. + * Last hop source routed frames go by destination address. + * Not last hop source routed frames go by _next_ route descriptor. + * Returns pointer to destination MAC address or fills in rdesc + * and returns NULL. + */ +#ifdef CONFIG_TR +static unsigned char *get_tr_dst(unsigned char *packet, unsigned char *rdesc) +{ + struct trh_hdr *trh; + unsigned int riflen, num_rdsc; + + trh = (struct trh_hdr *)packet; + if (trh->daddr[0] & (uint8_t) 0x80) + return bus_mac; /* multicast */ + + if (trh->saddr[0] & TR_RII) { + riflen = (ntohs(trh->rcf) & TR_RCF_LEN_MASK) >> 8; + if ((ntohs(trh->rcf) >> 13) != 0) + return bus_mac; /* ARE or STE */ + } else + return trh->daddr; /* not source routed */ + + if (riflen < 6) + return trh->daddr; /* last hop, source routed */ + + /* riflen is 6 or more, packet has more than one route descriptor */ + num_rdsc = (riflen / 2) - 1; + memset(rdesc, 0, ETH_ALEN); + /* offset 4 comes from LAN destination field in LE control frames */ + if (trh->rcf & htons((uint16_t) TR_RCF_DIR_BIT)) + memcpy(&rdesc[4], &trh->rseg[num_rdsc - 2], sizeof(__be16)); + else { + memcpy(&rdesc[4], &trh->rseg[1], sizeof(__be16)); + rdesc[5] = ((ntohs(trh->rseg[0]) & 0x000f) | (rdesc[5] & 0xf0)); + } + + return NULL; +} +#endif /* CONFIG_TR */ + +/* + * Open/initialize the netdevice. This is called (in the current kernel) + * sometime after booting when the 'ifconfig' program is run. + * + * This routine should set everything up anew at each open, even + * registers that "should" only need to be set once at boot, so that + * there is non-reboot way to recover if something goes wrong. + */ + +static int lec_open(struct net_device *dev) +{ + struct lec_priv *priv = (struct lec_priv *)dev->priv; + + netif_start_queue(dev); + memset(&priv->stats, 0, sizeof(struct net_device_stats)); + + return 0; +} + +static __inline__ void +lec_send(struct atm_vcc *vcc, struct sk_buff *skb, struct lec_priv *priv) +{ + ATM_SKB(skb)->vcc = vcc; + ATM_SKB(skb)->atm_options = vcc->atm_options; + + atomic_add(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); + if (vcc->send(vcc, skb) < 0) { + priv->stats.tx_dropped++; + return; + } + + priv->stats.tx_packets++; + priv->stats.tx_bytes += skb->len; +} + +static void lec_tx_timeout(struct net_device *dev) +{ + printk(KERN_INFO "%s: tx timeout\n", dev->name); + dev->trans_start = jiffies; + netif_wake_queue(dev); +} + +static int lec_start_xmit(struct sk_buff *skb, struct net_device *dev) +{ + struct sk_buff *skb2; + struct lec_priv *priv = (struct lec_priv *)dev->priv; + struct lecdatahdr_8023 *lec_h; + struct atm_vcc *vcc; + struct lec_arp_table *entry; + unsigned char *dst; + int min_frame_size; +#ifdef CONFIG_TR + unsigned char rdesc[ETH_ALEN]; /* Token Ring route descriptor */ +#endif + int is_rdesc; +#if DUMP_PACKETS > 0 + char buf[300]; + int i = 0; +#endif /* DUMP_PACKETS >0 */ + + pr_debug("lec_start_xmit called\n"); + if (!priv->lecd) { + printk("%s:No lecd attached\n", dev->name); + priv->stats.tx_errors++; + netif_stop_queue(dev); + return -EUNATCH; + } + + pr_debug("skbuff head:%lx data:%lx tail:%lx end:%lx\n", + (long)skb->head, (long)skb->data, (long)skb_tail_pointer(skb), + (long)skb_end_pointer(skb)); +#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) + if (memcmp(skb->data, bridge_ula_lec, sizeof(bridge_ula_lec)) == 0) + lec_handle_bridge(skb, dev); +#endif + + /* Make sure we have room for lec_id */ + if (skb_headroom(skb) < 2) { + + pr_debug("lec_start_xmit: reallocating skb\n"); + skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); + kfree_skb(skb); + if (skb2 == NULL) + return 0; + skb = skb2; + } + skb_push(skb, 2); + + /* Put le header to place, works for TokenRing too */ + lec_h = (struct lecdatahdr_8023 *)skb->data; + lec_h->le_header = htons(priv->lecid); + +#ifdef CONFIG_TR + /* + * Ugly. Use this to realign Token Ring packets for + * e.g. PCA-200E driver. + */ + if (priv->is_trdev) { + skb2 = skb_realloc_headroom(skb, LEC_HEADER_LEN); + kfree_skb(skb); + if (skb2 == NULL) + return 0; + skb = skb2; + } +#endif + +#if DUMP_PACKETS > 0 + printk("%s: send datalen:%ld lecid:%4.4x\n", dev->name, + skb->len, priv->lecid); +#if DUMP_PACKETS >= 2 + for (i = 0; i < skb->len && i < 99; i++) { + sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); + } +#elif DUMP_PACKETS >= 1 + for (i = 0; i < skb->len && i < 30; i++) { + sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); + } +#endif /* DUMP_PACKETS >= 1 */ + if (i == skb->len) + printk("%s\n", buf); + else + printk("%s...\n", buf); +#endif /* DUMP_PACKETS > 0 */ + + /* Minimum ethernet-frame size */ +#ifdef CONFIG_TR + if (priv->is_trdev) + min_frame_size = LEC_MINIMUM_8025_SIZE; + else +#endif + min_frame_size = LEC_MINIMUM_8023_SIZE; + if (skb->len < min_frame_size) { + if ((skb->len + skb_tailroom(skb)) < min_frame_size) { + skb2 = skb_copy_expand(skb, 0, + min_frame_size - skb->truesize, + GFP_ATOMIC); + dev_kfree_skb(skb); + if (skb2 == NULL) { + priv->stats.tx_dropped++; + return 0; + } + skb = skb2; + } + skb_put(skb, min_frame_size - skb->len); + } + + /* Send to right vcc */ + is_rdesc = 0; + dst = lec_h->h_dest; +#ifdef CONFIG_TR + if (priv->is_trdev) { + dst = get_tr_dst(skb->data + 2, rdesc); + if (dst == NULL) { + dst = rdesc; + is_rdesc = 1; + } + } +#endif + entry = NULL; + vcc = lec_arp_resolve(priv, dst, is_rdesc, &entry); + pr_debug("%s:vcc:%p vcc_flags:%lx, entry:%p\n", dev->name, + vcc, vcc ? vcc->flags : 0, entry); + if (!vcc || !test_bit(ATM_VF_READY, &vcc->flags)) { + if (entry && (entry->tx_wait.qlen < LEC_UNRES_QUE_LEN)) { + pr_debug("%s:lec_start_xmit: queuing packet, ", + dev->name); + pr_debug("MAC address " MAC_FMT "\n", + lec_h->h_dest[0], lec_h->h_dest[1], + lec_h->h_dest[2], lec_h->h_dest[3], + lec_h->h_dest[4], lec_h->h_dest[5]); + skb_queue_tail(&entry->tx_wait, skb); + } else { + pr_debug + ("%s:lec_start_xmit: tx queue full or no arp entry, dropping, ", + dev->name); + pr_debug("MAC address " MAC_FMT "\n", + lec_h->h_dest[0], lec_h->h_dest[1], + lec_h->h_dest[2], lec_h->h_dest[3], + lec_h->h_dest[4], lec_h->h_dest[5]); + priv->stats.tx_dropped++; + dev_kfree_skb(skb); + } + goto out; + } +#if DUMP_PACKETS > 0 + printk("%s:sending to vpi:%d vci:%d\n", dev->name, vcc->vpi, vcc->vci); +#endif /* DUMP_PACKETS > 0 */ + + while (entry && (skb2 = skb_dequeue(&entry->tx_wait))) { + pr_debug("lec.c: emptying tx queue, "); + pr_debug("MAC address " MAC_FMT "\n", + lec_h->h_dest[0], lec_h->h_dest[1], + lec_h->h_dest[2], lec_h->h_dest[3], + lec_h->h_dest[4], lec_h->h_dest[5]); + lec_send(vcc, skb2, priv); + } + + lec_send(vcc, skb, priv); + + if (!atm_may_send(vcc, 0)) { + struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); + + vpriv->xoff = 1; + netif_stop_queue(dev); + + /* + * vcc->pop() might have occurred in between, making + * the vcc usuable again. Since xmit is serialized, + * this is the only situation we have to re-test. + */ + + if (atm_may_send(vcc, 0)) + netif_wake_queue(dev); + } + +out: + if (entry) + lec_arp_put(entry); + dev->trans_start = jiffies; + return 0; +} + +/* The inverse routine to net_open(). */ +static int lec_close(struct net_device *dev) +{ + netif_stop_queue(dev); + return 0; +} + +/* + * Get the current statistics. + * This may be called with the card open or closed. + */ +static struct net_device_stats *lec_get_stats(struct net_device *dev) +{ + return &((struct lec_priv *)dev->priv)->stats; +} + +static int lec_atm_send(struct atm_vcc *vcc, struct sk_buff *skb) +{ + unsigned long flags; + struct net_device *dev = (struct net_device *)vcc->proto_data; + struct lec_priv *priv = (struct lec_priv *)dev->priv; + struct atmlec_msg *mesg; + struct lec_arp_table *entry; + int i; + char *tmp; /* FIXME */ + + atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); + mesg = (struct atmlec_msg *)skb->data; + tmp = skb->data; + tmp += sizeof(struct atmlec_msg); + pr_debug("%s: msg from zeppelin:%d\n", dev->name, mesg->type); + switch (mesg->type) { + case l_set_mac_addr: + for (i = 0; i < 6; i++) { + dev->dev_addr[i] = mesg->content.normal.mac_addr[i]; + } + break; + case l_del_mac_addr: + for (i = 0; i < 6; i++) { + dev->dev_addr[i] = 0; + } + break; + case l_addr_delete: + lec_addr_delete(priv, mesg->content.normal.atm_addr, + mesg->content.normal.flag); + break; + case l_topology_change: + priv->topology_change = mesg->content.normal.flag; + break; + case l_flush_complete: + lec_flush_complete(priv, mesg->content.normal.flag); + break; + case l_narp_req: /* LANE2: see 7.1.35 in the lane2 spec */ + spin_lock_irqsave(&priv->lec_arp_lock, flags); + entry = lec_arp_find(priv, mesg->content.normal.mac_addr); + lec_arp_remove(priv, entry); + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + + if (mesg->content.normal.no_source_le_narp) + break; + /* FALL THROUGH */ + case l_arp_update: + lec_arp_update(priv, mesg->content.normal.mac_addr, + mesg->content.normal.atm_addr, + mesg->content.normal.flag, + mesg->content.normal.targetless_le_arp); + pr_debug("lec: in l_arp_update\n"); + if (mesg->sizeoftlvs != 0) { /* LANE2 3.1.5 */ + pr_debug("lec: LANE2 3.1.5, got tlvs, size %d\n", + mesg->sizeoftlvs); + lane2_associate_ind(dev, mesg->content.normal.mac_addr, + tmp, mesg->sizeoftlvs); + } + break; + case l_config: + priv->maximum_unknown_frame_count = + mesg->content.config.maximum_unknown_frame_count; + priv->max_unknown_frame_time = + (mesg->content.config.max_unknown_frame_time * HZ); + priv->max_retry_count = mesg->content.config.max_retry_count; + priv->aging_time = (mesg->content.config.aging_time * HZ); + priv->forward_delay_time = + (mesg->content.config.forward_delay_time * HZ); + priv->arp_response_time = + (mesg->content.config.arp_response_time * HZ); + priv->flush_timeout = (mesg->content.config.flush_timeout * HZ); + priv->path_switching_delay = + (mesg->content.config.path_switching_delay * HZ); + priv->lane_version = mesg->content.config.lane_version; /* LANE2 */ + priv->lane2_ops = NULL; + if (priv->lane_version > 1) + priv->lane2_ops = &lane2_ops; + if (dev->change_mtu(dev, mesg->content.config.mtu)) + printk("%s: change_mtu to %d failed\n", dev->name, + mesg->content.config.mtu); + priv->is_proxy = mesg->content.config.is_proxy; + break; + case l_flush_tran_id: + lec_set_flush_tran_id(priv, mesg->content.normal.atm_addr, + mesg->content.normal.flag); + break; + case l_set_lecid: + priv->lecid = + (unsigned short)(0xffff & mesg->content.normal.flag); + break; + case l_should_bridge: +#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) + { + struct net_bridge_fdb_entry *f; + + pr_debug + ("%s: bridge zeppelin asks about " MAC_FMT "\n", + dev->name, + mesg->content.proxy.mac_addr[0], + mesg->content.proxy.mac_addr[1], + mesg->content.proxy.mac_addr[2], + mesg->content.proxy.mac_addr[3], + mesg->content.proxy.mac_addr[4], + mesg->content.proxy.mac_addr[5]); + + if (br_fdb_get_hook == NULL || dev->br_port == NULL) + break; + + f = br_fdb_get_hook(dev->br_port->br, + mesg->content.proxy.mac_addr); + if (f != NULL && f->dst->dev != dev + && f->dst->state == BR_STATE_FORWARDING) { + /* hit from bridge table, send LE_ARP_RESPONSE */ + struct sk_buff *skb2; + struct sock *sk; + + pr_debug + ("%s: entry found, responding to zeppelin\n", + dev->name); + skb2 = + alloc_skb(sizeof(struct atmlec_msg), + GFP_ATOMIC); + if (skb2 == NULL) { + br_fdb_put_hook(f); + break; + } + skb2->len = sizeof(struct atmlec_msg); + skb_copy_to_linear_data(skb2, mesg, + sizeof(*mesg)); + atm_force_charge(priv->lecd, skb2->truesize); + sk = sk_atm(priv->lecd); + skb_queue_tail(&sk->sk_receive_queue, skb2); + sk->sk_data_ready(sk, skb2->len); + } + if (f != NULL) + br_fdb_put_hook(f); + } +#endif /* defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) */ + break; + default: + printk("%s: Unknown message type %d\n", dev->name, mesg->type); + dev_kfree_skb(skb); + return -EINVAL; + } + dev_kfree_skb(skb); + return 0; +} + +static void lec_atm_close(struct atm_vcc *vcc) +{ + struct sk_buff *skb; + struct net_device *dev = (struct net_device *)vcc->proto_data; + struct lec_priv *priv = (struct lec_priv *)dev->priv; + + priv->lecd = NULL; + /* Do something needful? */ + + netif_stop_queue(dev); + lec_arp_destroy(priv); + + if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) + printk("%s lec_atm_close: closing with messages pending\n", + dev->name); + while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue)) != NULL) { + atm_return(vcc, skb->truesize); + dev_kfree_skb(skb); + } + + printk("%s: Shut down!\n", dev->name); + module_put(THIS_MODULE); +} + +static struct atmdev_ops lecdev_ops = { + .close = lec_atm_close, + .send = lec_atm_send +}; + +static struct atm_dev lecatm_dev = { + .ops = &lecdev_ops, + .type = "lec", + .number = 999, /* dummy device number */ + .lock = __SPIN_LOCK_UNLOCKED(lecatm_dev.lock) +}; + +/* + * LANE2: new argument struct sk_buff *data contains + * the LE_ARP based TLVs introduced in the LANE2 spec + */ +static int +send_to_lecd(struct lec_priv *priv, atmlec_msg_type type, + const unsigned char *mac_addr, const unsigned char *atm_addr, + struct sk_buff *data) +{ + struct sock *sk; + struct sk_buff *skb; + struct atmlec_msg *mesg; + + if (!priv || !priv->lecd) { + return -1; + } + skb = alloc_skb(sizeof(struct atmlec_msg), GFP_ATOMIC); + if (!skb) + return -1; + skb->len = sizeof(struct atmlec_msg); + mesg = (struct atmlec_msg *)skb->data; + memset(mesg, 0, sizeof(struct atmlec_msg)); + mesg->type = type; + if (data != NULL) + mesg->sizeoftlvs = data->len; + if (mac_addr) + memcpy(&mesg->content.normal.mac_addr, mac_addr, ETH_ALEN); + else + mesg->content.normal.targetless_le_arp = 1; + if (atm_addr) + memcpy(&mesg->content.normal.atm_addr, atm_addr, ATM_ESA_LEN); + + atm_force_charge(priv->lecd, skb->truesize); + sk = sk_atm(priv->lecd); + skb_queue_tail(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); + + if (data != NULL) { + pr_debug("lec: about to send %d bytes of data\n", data->len); + atm_force_charge(priv->lecd, data->truesize); + skb_queue_tail(&sk->sk_receive_queue, data); + sk->sk_data_ready(sk, skb->len); + } + + return 0; +} + +/* shamelessly stolen from drivers/net/net_init.c */ +static int lec_change_mtu(struct net_device *dev, int new_mtu) +{ + if ((new_mtu < 68) || (new_mtu > 18190)) + return -EINVAL; + dev->mtu = new_mtu; + return 0; +} + +static void lec_set_multicast_list(struct net_device *dev) +{ + /* + * by default, all multicast frames arrive over the bus. + * eventually support selective multicast service + */ + return; +} + +static void lec_init(struct net_device *dev) +{ + dev->change_mtu = lec_change_mtu; + dev->open = lec_open; + dev->stop = lec_close; + dev->hard_start_xmit = lec_start_xmit; + dev->tx_timeout = lec_tx_timeout; + + dev->get_stats = lec_get_stats; + dev->set_multicast_list = lec_set_multicast_list; + dev->do_ioctl = NULL; + printk("%s: Initialized!\n", dev->name); +} + +static const unsigned char lec_ctrl_magic[] = { + 0xff, + 0x00, + 0x01, + 0x01 +}; + +#define LEC_DATA_DIRECT_8023 2 +#define LEC_DATA_DIRECT_8025 3 + +static int lec_is_data_direct(struct atm_vcc *vcc) +{ + return ((vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8023) || + (vcc->sap.blli[0].l3.tr9577.snap[4] == LEC_DATA_DIRECT_8025)); +} + +static void lec_push(struct atm_vcc *vcc, struct sk_buff *skb) +{ + unsigned long flags; + struct net_device *dev = (struct net_device *)vcc->proto_data; + struct lec_priv *priv = (struct lec_priv *)dev->priv; + +#if DUMP_PACKETS >0 + int i = 0; + char buf[300]; + + printk("%s: lec_push vcc vpi:%d vci:%d\n", dev->name, + vcc->vpi, vcc->vci); +#endif + if (!skb) { + pr_debug("%s: null skb\n", dev->name); + lec_vcc_close(priv, vcc); + return; + } +#if DUMP_PACKETS > 0 + printk("%s: rcv datalen:%ld lecid:%4.4x\n", dev->name, + skb->len, priv->lecid); +#if DUMP_PACKETS >= 2 + for (i = 0; i < skb->len && i < 99; i++) { + sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); + } +#elif DUMP_PACKETS >= 1 + for (i = 0; i < skb->len && i < 30; i++) { + sprintf(buf + i * 3, "%2.2x ", 0xff & skb->data[i]); + } +#endif /* DUMP_PACKETS >= 1 */ + if (i == skb->len) + printk("%s\n", buf); + else + printk("%s...\n", buf); +#endif /* DUMP_PACKETS > 0 */ + if (memcmp(skb->data, lec_ctrl_magic, 4) == 0) { /* Control frame, to daemon */ + struct sock *sk = sk_atm(vcc); + + pr_debug("%s: To daemon\n", dev->name); + skb_queue_tail(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); + } else { /* Data frame, queue to protocol handlers */ + struct lec_arp_table *entry; + unsigned char *src, *dst; + + atm_return(vcc, skb->truesize); + if (*(__be16 *) skb->data == htons(priv->lecid) || + !priv->lecd || !(dev->flags & IFF_UP)) { + /* + * Probably looping back, or if lecd is missing, + * lecd has gone down + */ + pr_debug("Ignoring frame...\n"); + dev_kfree_skb(skb); + return; + } +#ifdef CONFIG_TR + if (priv->is_trdev) + dst = ((struct lecdatahdr_8025 *)skb->data)->h_dest; + else +#endif + dst = ((struct lecdatahdr_8023 *)skb->data)->h_dest; + + /* + * If this is a Data Direct VCC, and the VCC does not match + * the LE_ARP cache entry, delete the LE_ARP cache entry. + */ + spin_lock_irqsave(&priv->lec_arp_lock, flags); + if (lec_is_data_direct(vcc)) { +#ifdef CONFIG_TR + if (priv->is_trdev) + src = + ((struct lecdatahdr_8025 *)skb->data)-> + h_source; + else +#endif + src = + ((struct lecdatahdr_8023 *)skb->data)-> + h_source; + entry = lec_arp_find(priv, src); + if (entry && entry->vcc != vcc) { + lec_arp_remove(priv, entry); + lec_arp_put(entry); + } + } + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + + if (!(dst[0] & 0x01) && /* Never filter Multi/Broadcast */ + !priv->is_proxy && /* Proxy wants all the packets */ + memcmp(dst, dev->dev_addr, dev->addr_len)) { + dev_kfree_skb(skb); + return; + } + if (!hlist_empty(&priv->lec_arp_empty_ones)) { + lec_arp_check_empties(priv, vcc, skb); + } + skb_pull(skb, 2); /* skip lec_id */ +#ifdef CONFIG_TR + if (priv->is_trdev) + skb->protocol = tr_type_trans(skb, dev); + else +#endif + skb->protocol = eth_type_trans(skb, dev); + priv->stats.rx_packets++; + priv->stats.rx_bytes += skb->len; + memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); + netif_rx(skb); + } +} + +static void lec_pop(struct atm_vcc *vcc, struct sk_buff *skb) +{ + struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); + struct net_device *dev = skb->dev; + + if (vpriv == NULL) { + printk("lec_pop(): vpriv = NULL!?!?!?\n"); + return; + } + + vpriv->old_pop(vcc, skb); + + if (vpriv->xoff && atm_may_send(vcc, 0)) { + vpriv->xoff = 0; + if (netif_running(dev) && netif_queue_stopped(dev)) + netif_wake_queue(dev); + } +} + +static int lec_vcc_attach(struct atm_vcc *vcc, void __user *arg) +{ + struct lec_vcc_priv *vpriv; + int bytes_left; + struct atmlec_ioc ioc_data; + + /* Lecd must be up in this case */ + bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmlec_ioc)); + if (bytes_left != 0) { + printk + ("lec: lec_vcc_attach, copy from user failed for %d bytes\n", + bytes_left); + } + if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF || + !dev_lec[ioc_data.dev_num]) + return -EINVAL; + if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) + return -ENOMEM; + vpriv->xoff = 0; + vpriv->old_pop = vcc->pop; + vcc->user_back = vpriv; + vcc->pop = lec_pop; + lec_vcc_added(dev_lec[ioc_data.dev_num]->priv, + &ioc_data, vcc, vcc->push); + vcc->proto_data = dev_lec[ioc_data.dev_num]; + vcc->push = lec_push; + return 0; +} + +static int lec_mcast_attach(struct atm_vcc *vcc, int arg) +{ + if (arg < 0 || arg >= MAX_LEC_ITF || !dev_lec[arg]) + return -EINVAL; + vcc->proto_data = dev_lec[arg]; + return (lec_mcast_make((struct lec_priv *)dev_lec[arg]->priv, vcc)); +} + +/* Initialize device. */ +static int lecd_attach(struct atm_vcc *vcc, int arg) +{ + int i; + struct lec_priv *priv; + + if (arg < 0) + i = 0; + else + i = arg; +#ifdef CONFIG_TR + if (arg >= MAX_LEC_ITF) + return -EINVAL; +#else /* Reserve the top NUM_TR_DEVS for TR */ + if (arg >= (MAX_LEC_ITF - NUM_TR_DEVS)) + return -EINVAL; +#endif + if (!dev_lec[i]) { + int is_trdev, size; + + is_trdev = 0; + if (i >= (MAX_LEC_ITF - NUM_TR_DEVS)) + is_trdev = 1; + + size = sizeof(struct lec_priv); +#ifdef CONFIG_TR + if (is_trdev) + dev_lec[i] = alloc_trdev(size); + else +#endif + dev_lec[i] = alloc_etherdev(size); + if (!dev_lec[i]) + return -ENOMEM; + snprintf(dev_lec[i]->name, IFNAMSIZ, "lec%d", i); + if (register_netdev(dev_lec[i])) { + free_netdev(dev_lec[i]); + return -EINVAL; + } + + priv = dev_lec[i]->priv; + priv->is_trdev = is_trdev; + lec_init(dev_lec[i]); + } else { + priv = dev_lec[i]->priv; + if (priv->lecd) + return -EADDRINUSE; + } + lec_arp_init(priv); + priv->itfnum = i; /* LANE2 addition */ + priv->lecd = vcc; + vcc->dev = &lecatm_dev; + vcc_insert_socket(sk_atm(vcc)); + + vcc->proto_data = dev_lec[i]; + set_bit(ATM_VF_META, &vcc->flags); + set_bit(ATM_VF_READY, &vcc->flags); + + /* Set default values to these variables */ + priv->maximum_unknown_frame_count = 1; + priv->max_unknown_frame_time = (1 * HZ); + priv->vcc_timeout_period = (1200 * HZ); + priv->max_retry_count = 1; + priv->aging_time = (300 * HZ); + priv->forward_delay_time = (15 * HZ); + priv->topology_change = 0; + priv->arp_response_time = (1 * HZ); + priv->flush_timeout = (4 * HZ); + priv->path_switching_delay = (6 * HZ); + + if (dev_lec[i]->flags & IFF_UP) { + netif_start_queue(dev_lec[i]); + } + __module_get(THIS_MODULE); + return i; +} + +#ifdef CONFIG_PROC_FS +static char *lec_arp_get_status_string(unsigned char status) +{ + static char *lec_arp_status_string[] = { + "ESI_UNKNOWN ", + "ESI_ARP_PENDING ", + "ESI_VC_PENDING ", + " ", + "ESI_FLUSH_PENDING ", + "ESI_FORWARD_DIRECT" + }; + + if (status > ESI_FORWARD_DIRECT) + status = 3; /* ESI_UNDEFINED */ + return lec_arp_status_string[status]; +} + +static void lec_info(struct seq_file *seq, struct lec_arp_table *entry) +{ + int i; + + for (i = 0; i < ETH_ALEN; i++) + seq_printf(seq, "%2.2x", entry->mac_addr[i] & 0xff); + seq_printf(seq, " "); + for (i = 0; i < ATM_ESA_LEN; i++) + seq_printf(seq, "%2.2x", entry->atm_addr[i] & 0xff); + seq_printf(seq, " %s %4.4x", lec_arp_get_status_string(entry->status), + entry->flags & 0xffff); + if (entry->vcc) + seq_printf(seq, "%3d %3d ", entry->vcc->vpi, entry->vcc->vci); + else + seq_printf(seq, " "); + if (entry->recv_vcc) { + seq_printf(seq, " %3d %3d", entry->recv_vcc->vpi, + entry->recv_vcc->vci); + } + seq_putc(seq, '\n'); +} + +struct lec_state { + unsigned long flags; + struct lec_priv *locked; + struct hlist_node *node; + struct net_device *dev; + int itf; + int arp_table; + int misc_table; +}; + +static void *lec_tbl_walk(struct lec_state *state, struct hlist_head *tbl, + loff_t *l) +{ + struct hlist_node *e = state->node; + struct lec_arp_table *tmp; + + if (!e) + e = tbl->first; + if (e == SEQ_START_TOKEN) { + e = tbl->first; + --*l; + } + + hlist_for_each_entry_from(tmp, e, next) { + if (--*l < 0) + break; + } + state->node = e; + + return (*l < 0) ? state : NULL; +} + +static void *lec_arp_walk(struct lec_state *state, loff_t *l, + struct lec_priv *priv) +{ + void *v = NULL; + int p; + + for (p = state->arp_table; p < LEC_ARP_TABLE_SIZE; p++) { + v = lec_tbl_walk(state, &priv->lec_arp_tables[p], l); + if (v) + break; + } + state->arp_table = p; + return v; +} + +static void *lec_misc_walk(struct lec_state *state, loff_t *l, + struct lec_priv *priv) +{ + struct hlist_head *lec_misc_tables[] = { + &priv->lec_arp_empty_ones, + &priv->lec_no_forward, + &priv->mcast_fwds + }; + void *v = NULL; + int q; + + for (q = state->misc_table; q < ARRAY_SIZE(lec_misc_tables); q++) { + v = lec_tbl_walk(state, lec_misc_tables[q], l); + if (v) + break; + } + state->misc_table = q; + return v; +} + +static void *lec_priv_walk(struct lec_state *state, loff_t *l, + struct lec_priv *priv) +{ + if (!state->locked) { + state->locked = priv; + spin_lock_irqsave(&priv->lec_arp_lock, state->flags); + } + if (!lec_arp_walk(state, l, priv) && !lec_misc_walk(state, l, priv)) { + spin_unlock_irqrestore(&priv->lec_arp_lock, state->flags); + state->locked = NULL; + /* Partial state reset for the next time we get called */ + state->arp_table = state->misc_table = 0; + } + return state->locked; +} + +static void *lec_itf_walk(struct lec_state *state, loff_t *l) +{ + struct net_device *dev; + void *v; + + dev = state->dev ? state->dev : dev_lec[state->itf]; + v = (dev && dev->priv) ? lec_priv_walk(state, l, dev->priv) : NULL; + if (!v && dev) { + dev_put(dev); + /* Partial state reset for the next time we get called */ + dev = NULL; + } + state->dev = dev; + return v; +} + +static void *lec_get_idx(struct lec_state *state, loff_t l) +{ + void *v = NULL; + + for (; state->itf < MAX_LEC_ITF; state->itf++) { + v = lec_itf_walk(state, &l); + if (v) + break; + } + return v; +} + +static void *lec_seq_start(struct seq_file *seq, loff_t *pos) +{ + struct lec_state *state = seq->private; + + state->itf = 0; + state->dev = NULL; + state->locked = NULL; + state->arp_table = 0; + state->misc_table = 0; + state->node = SEQ_START_TOKEN; + + return *pos ? lec_get_idx(state, *pos) : SEQ_START_TOKEN; +} + +static void lec_seq_stop(struct seq_file *seq, void *v) +{ + struct lec_state *state = seq->private; + + if (state->dev) { + spin_unlock_irqrestore(&state->locked->lec_arp_lock, + state->flags); + dev_put(state->dev); + } +} + +static void *lec_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + struct lec_state *state = seq->private; + + v = lec_get_idx(state, 1); + *pos += !!PTR_ERR(v); + return v; +} + +static int lec_seq_show(struct seq_file *seq, void *v) +{ + static char lec_banner[] = "Itf MAC ATM destination" + " Status Flags " + "VPI/VCI Recv VPI/VCI\n"; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, lec_banner); + else { + struct lec_state *state = seq->private; + struct net_device *dev = state->dev; + struct lec_arp_table *entry = hlist_entry(state->node, struct lec_arp_table, next); + + seq_printf(seq, "%s ", dev->name); + lec_info(seq, entry); + } + return 0; +} + +static const struct seq_operations lec_seq_ops = { + .start = lec_seq_start, + .next = lec_seq_next, + .stop = lec_seq_stop, + .show = lec_seq_show, +}; + +static int lec_seq_open(struct inode *inode, struct file *file) +{ + return seq_open_private(file, &lec_seq_ops, sizeof(struct lec_state)); +} + +static const struct file_operations lec_seq_fops = { + .owner = THIS_MODULE, + .open = lec_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_private, +}; +#endif + +static int lane_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) +{ + struct atm_vcc *vcc = ATM_SD(sock); + int err = 0; + + switch (cmd) { + case ATMLEC_CTRL: + case ATMLEC_MCAST: + case ATMLEC_DATA: + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + break; + default: + return -ENOIOCTLCMD; + } + + switch (cmd) { + case ATMLEC_CTRL: + err = lecd_attach(vcc, (int)arg); + if (err >= 0) + sock->state = SS_CONNECTED; + break; + case ATMLEC_MCAST: + err = lec_mcast_attach(vcc, (int)arg); + break; + case ATMLEC_DATA: + err = lec_vcc_attach(vcc, (void __user *)arg); + break; + } + + return err; +} + +static struct atm_ioctl lane_ioctl_ops = { + .owner = THIS_MODULE, + .ioctl = lane_ioctl, +}; + +static int __init lane_module_init(void) +{ +#ifdef CONFIG_PROC_FS + struct proc_dir_entry *p; + + p = proc_create("lec", S_IRUGO, atm_proc_root, &lec_seq_fops); + if (!p) { + printk(KERN_ERR "Unable to initialize /proc/net/atm/lec\n"); + return -ENOMEM; + } +#endif + + register_atm_ioctl(&lane_ioctl_ops); + printk("lec.c: " __DATE__ " " __TIME__ " initialized\n"); + return 0; +} + +static void __exit lane_module_cleanup(void) +{ + int i; + struct lec_priv *priv; + + remove_proc_entry("lec", atm_proc_root); + + deregister_atm_ioctl(&lane_ioctl_ops); + + for (i = 0; i < MAX_LEC_ITF; i++) { + if (dev_lec[i] != NULL) { + priv = (struct lec_priv *)dev_lec[i]->priv; + unregister_netdev(dev_lec[i]); + free_netdev(dev_lec[i]); + dev_lec[i] = NULL; + } + } + + return; +} + +module_init(lane_module_init); +module_exit(lane_module_cleanup); + +/* + * LANE2: 3.1.3, LE_RESOLVE.request + * Non force allocates memory and fills in *tlvs, fills in *sizeoftlvs. + * If sizeoftlvs == NULL the default TLVs associated with with this + * lec will be used. + * If dst_mac == NULL, targetless LE_ARP will be sent + */ +static int lane2_resolve(struct net_device *dev, const u8 *dst_mac, int force, + u8 **tlvs, u32 *sizeoftlvs) +{ + unsigned long flags; + struct lec_priv *priv = (struct lec_priv *)dev->priv; + struct lec_arp_table *table; + struct sk_buff *skb; + int retval; + + if (force == 0) { + spin_lock_irqsave(&priv->lec_arp_lock, flags); + table = lec_arp_find(priv, dst_mac); + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + if (table == NULL) + return -1; + + *tlvs = kmemdup(table->tlvs, table->sizeoftlvs, GFP_ATOMIC); + if (*tlvs == NULL) + return -1; + + *sizeoftlvs = table->sizeoftlvs; + + return 0; + } + + if (sizeoftlvs == NULL) + retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, NULL); + + else { + skb = alloc_skb(*sizeoftlvs, GFP_ATOMIC); + if (skb == NULL) + return -1; + skb->len = *sizeoftlvs; + skb_copy_to_linear_data(skb, *tlvs, *sizeoftlvs); + retval = send_to_lecd(priv, l_arp_xmt, dst_mac, NULL, skb); + } + return retval; +} + +/* + * LANE2: 3.1.4, LE_ASSOCIATE.request + * Associate the *tlvs with the *lan_dst address. + * Will overwrite any previous association + * Returns 1 for success, 0 for failure (out of memory) + * + */ +static int lane2_associate_req(struct net_device *dev, const u8 *lan_dst, + const u8 *tlvs, u32 sizeoftlvs) +{ + int retval; + struct sk_buff *skb; + struct lec_priv *priv = (struct lec_priv *)dev->priv; + + if (compare_ether_addr(lan_dst, dev->dev_addr)) + return (0); /* not our mac address */ + + kfree(priv->tlvs); /* NULL if there was no previous association */ + + priv->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); + if (priv->tlvs == NULL) + return (0); + priv->sizeoftlvs = sizeoftlvs; + + skb = alloc_skb(sizeoftlvs, GFP_ATOMIC); + if (skb == NULL) + return 0; + skb->len = sizeoftlvs; + skb_copy_to_linear_data(skb, tlvs, sizeoftlvs); + retval = send_to_lecd(priv, l_associate_req, NULL, NULL, skb); + if (retval != 0) + printk("lec.c: lane2_associate_req() failed\n"); + /* + * If the previous association has changed we must + * somehow notify other LANE entities about the change + */ + return (1); +} + +/* + * LANE2: 3.1.5, LE_ASSOCIATE.indication + * + */ +static void lane2_associate_ind(struct net_device *dev, const u8 *mac_addr, + const u8 *tlvs, u32 sizeoftlvs) +{ +#if 0 + int i = 0; +#endif + struct lec_priv *priv = (struct lec_priv *)dev->priv; +#if 0 /* + * Why have the TLVs in LE_ARP entries + * since we do not use them? When you + * uncomment this code, make sure the + * TLVs get freed when entry is killed + */ + struct lec_arp_table *entry = lec_arp_find(priv, mac_addr); + + if (entry == NULL) + return; /* should not happen */ + + kfree(entry->tlvs); + + entry->tlvs = kmemdup(tlvs, sizeoftlvs, GFP_KERNEL); + if (entry->tlvs == NULL) + return; + entry->sizeoftlvs = sizeoftlvs; +#endif +#if 0 + printk("lec.c: lane2_associate_ind()\n"); + printk("dump of tlvs, sizeoftlvs=%d\n", sizeoftlvs); + while (i < sizeoftlvs) + printk("%02x ", tlvs[i++]); + + printk("\n"); +#endif + + /* tell MPOA about the TLVs we saw */ + if (priv->lane2_ops && priv->lane2_ops->associate_indicator) { + priv->lane2_ops->associate_indicator(dev, mac_addr, + tlvs, sizeoftlvs); + } + return; +} + +/* + * Here starts what used to lec_arpc.c + * + * lec_arpc.c was added here when making + * lane client modular. October 1997 + */ + +#include +#include +#include +#include +#include +#include + +#if 0 +#define pr_debug(format,args...) +/* +#define pr_debug printk +*/ +#endif +#define DEBUG_ARP_TABLE 0 + +#define LEC_ARP_REFRESH_INTERVAL (3*HZ) + +static void lec_arp_check_expire(struct work_struct *work); +static void lec_arp_expire_arp(unsigned long data); + +/* + * Arp table funcs + */ + +#define HASH(ch) (ch & (LEC_ARP_TABLE_SIZE -1)) + +/* + * Initialization of arp-cache + */ +static void lec_arp_init(struct lec_priv *priv) +{ + unsigned short i; + + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); + } + INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); + INIT_HLIST_HEAD(&priv->lec_no_forward); + INIT_HLIST_HEAD(&priv->mcast_fwds); + spin_lock_init(&priv->lec_arp_lock); + INIT_DELAYED_WORK(&priv->lec_arp_work, lec_arp_check_expire); + schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); +} + +static void lec_arp_clear_vccs(struct lec_arp_table *entry) +{ + if (entry->vcc) { + struct atm_vcc *vcc = entry->vcc; + struct lec_vcc_priv *vpriv = LEC_VCC_PRIV(vcc); + struct net_device *dev = (struct net_device *)vcc->proto_data; + + vcc->pop = vpriv->old_pop; + if (vpriv->xoff) + netif_wake_queue(dev); + kfree(vpriv); + vcc->user_back = NULL; + vcc->push = entry->old_push; + vcc_release_async(vcc, -EPIPE); + entry->vcc = NULL; + } + if (entry->recv_vcc) { + entry->recv_vcc->push = entry->old_recv_push; + vcc_release_async(entry->recv_vcc, -EPIPE); + entry->recv_vcc = NULL; + } +} + +/* + * Insert entry to lec_arp_table + * LANE2: Add to the end of the list to satisfy 8.1.13 + */ +static inline void +lec_arp_add(struct lec_priv *priv, struct lec_arp_table *entry) +{ + struct hlist_head *tmp; + + tmp = &priv->lec_arp_tables[HASH(entry->mac_addr[ETH_ALEN - 1])]; + hlist_add_head(&entry->next, tmp); + + pr_debug("LEC_ARP: Added entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", + 0xff & entry->mac_addr[0], 0xff & entry->mac_addr[1], + 0xff & entry->mac_addr[2], 0xff & entry->mac_addr[3], + 0xff & entry->mac_addr[4], 0xff & entry->mac_addr[5]); +} + +/* + * Remove entry from lec_arp_table + */ +static int +lec_arp_remove(struct lec_priv *priv, struct lec_arp_table *to_remove) +{ + struct hlist_node *node; + struct lec_arp_table *entry; + int i, remove_vcc = 1; + + if (!to_remove) { + return -1; + } + + hlist_del(&to_remove->next); + del_timer(&to_remove->timer); + + /* If this is the only MAC connected to this VCC, also tear down the VCC */ + if (to_remove->status >= ESI_FLUSH_PENDING) { + /* + * ESI_FLUSH_PENDING, ESI_FORWARD_DIRECT + */ + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { + if (memcmp(to_remove->atm_addr, + entry->atm_addr, ATM_ESA_LEN) == 0) { + remove_vcc = 0; + break; + } + } + } + if (remove_vcc) + lec_arp_clear_vccs(to_remove); + } + skb_queue_purge(&to_remove->tx_wait); /* FIXME: good place for this? */ + + pr_debug("LEC_ARP: Removed entry:%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", + 0xff & to_remove->mac_addr[0], 0xff & to_remove->mac_addr[1], + 0xff & to_remove->mac_addr[2], 0xff & to_remove->mac_addr[3], + 0xff & to_remove->mac_addr[4], 0xff & to_remove->mac_addr[5]); + return 0; +} + +#if DEBUG_ARP_TABLE +static char *get_status_string(unsigned char st) +{ + switch (st) { + case ESI_UNKNOWN: + return "ESI_UNKNOWN"; + case ESI_ARP_PENDING: + return "ESI_ARP_PENDING"; + case ESI_VC_PENDING: + return "ESI_VC_PENDING"; + case ESI_FLUSH_PENDING: + return "ESI_FLUSH_PENDING"; + case ESI_FORWARD_DIRECT: + return "ESI_FORWARD_DIRECT"; + default: + return ""; + } +} + +static void dump_arp_table(struct lec_priv *priv) +{ + struct hlist_node *node; + struct lec_arp_table *rulla; + char buf[256]; + int i, j, offset; + + printk("Dump %p:\n", priv); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry(rulla, node, &priv->lec_arp_tables[i], next) { + offset = 0; + offset += sprintf(buf, "%d: %p\n", i, rulla); + offset += sprintf(buf + offset, "Mac:"); + for (j = 0; j < ETH_ALEN; j++) { + offset += sprintf(buf + offset, + "%2.2x ", + rulla->mac_addr[j] & 0xff); + } + offset += sprintf(buf + offset, "Atm:"); + for (j = 0; j < ATM_ESA_LEN; j++) { + offset += sprintf(buf + offset, + "%2.2x ", + rulla->atm_addr[j] & 0xff); + } + offset += sprintf(buf + offset, + "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", + rulla->vcc ? rulla->vcc->vpi : 0, + rulla->vcc ? rulla->vcc->vci : 0, + rulla->recv_vcc ? rulla->recv_vcc-> + vpi : 0, + rulla->recv_vcc ? rulla->recv_vcc-> + vci : 0, rulla->last_used, + rulla->timestamp, rulla->no_tries); + offset += + sprintf(buf + offset, + "Flags:%x, Packets_flooded:%x, Status: %s ", + rulla->flags, rulla->packets_flooded, + get_status_string(rulla->status)); + printk("%s\n", buf); + } + } + + if (!hlist_empty(&priv->lec_no_forward)) + printk("No forward\n"); + hlist_for_each_entry(rulla, node, &priv->lec_no_forward, next) { + offset = 0; + offset += sprintf(buf + offset, "Mac:"); + for (j = 0; j < ETH_ALEN; j++) { + offset += sprintf(buf + offset, "%2.2x ", + rulla->mac_addr[j] & 0xff); + } + offset += sprintf(buf + offset, "Atm:"); + for (j = 0; j < ATM_ESA_LEN; j++) { + offset += sprintf(buf + offset, "%2.2x ", + rulla->atm_addr[j] & 0xff); + } + offset += sprintf(buf + offset, + "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", + rulla->vcc ? rulla->vcc->vpi : 0, + rulla->vcc ? rulla->vcc->vci : 0, + rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, + rulla->recv_vcc ? rulla->recv_vcc->vci : 0, + rulla->last_used, + rulla->timestamp, rulla->no_tries); + offset += sprintf(buf + offset, + "Flags:%x, Packets_flooded:%x, Status: %s ", + rulla->flags, rulla->packets_flooded, + get_status_string(rulla->status)); + printk("%s\n", buf); + } + + if (!hlist_empty(&priv->lec_arp_empty_ones)) + printk("Empty ones\n"); + hlist_for_each_entry(rulla, node, &priv->lec_arp_empty_ones, next) { + offset = 0; + offset += sprintf(buf + offset, "Mac:"); + for (j = 0; j < ETH_ALEN; j++) { + offset += sprintf(buf + offset, "%2.2x ", + rulla->mac_addr[j] & 0xff); + } + offset += sprintf(buf + offset, "Atm:"); + for (j = 0; j < ATM_ESA_LEN; j++) { + offset += sprintf(buf + offset, "%2.2x ", + rulla->atm_addr[j] & 0xff); + } + offset += sprintf(buf + offset, + "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", + rulla->vcc ? rulla->vcc->vpi : 0, + rulla->vcc ? rulla->vcc->vci : 0, + rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, + rulla->recv_vcc ? rulla->recv_vcc->vci : 0, + rulla->last_used, + rulla->timestamp, rulla->no_tries); + offset += sprintf(buf + offset, + "Flags:%x, Packets_flooded:%x, Status: %s ", + rulla->flags, rulla->packets_flooded, + get_status_string(rulla->status)); + printk("%s", buf); + } + + if (!hlist_empty(&priv->mcast_fwds)) + printk("Multicast Forward VCCs\n"); + hlist_for_each_entry(rulla, node, &priv->mcast_fwds, next) { + offset = 0; + offset += sprintf(buf + offset, "Mac:"); + for (j = 0; j < ETH_ALEN; j++) { + offset += sprintf(buf + offset, "%2.2x ", + rulla->mac_addr[j] & 0xff); + } + offset += sprintf(buf + offset, "Atm:"); + for (j = 0; j < ATM_ESA_LEN; j++) { + offset += sprintf(buf + offset, "%2.2x ", + rulla->atm_addr[j] & 0xff); + } + offset += sprintf(buf + offset, + "Vcc vpi:%d vci:%d, Recv_vcc vpi:%d vci:%d Last_used:%lx, Timestamp:%lx, No_tries:%d ", + rulla->vcc ? rulla->vcc->vpi : 0, + rulla->vcc ? rulla->vcc->vci : 0, + rulla->recv_vcc ? rulla->recv_vcc->vpi : 0, + rulla->recv_vcc ? rulla->recv_vcc->vci : 0, + rulla->last_used, + rulla->timestamp, rulla->no_tries); + offset += sprintf(buf + offset, + "Flags:%x, Packets_flooded:%x, Status: %s ", + rulla->flags, rulla->packets_flooded, + get_status_string(rulla->status)); + printk("%s\n", buf); + } + +} +#else +#define dump_arp_table(priv) do { } while (0) +#endif + +/* + * Destruction of arp-cache + */ +static void lec_arp_destroy(struct lec_priv *priv) +{ + unsigned long flags; + struct hlist_node *node, *next; + struct lec_arp_table *entry; + int i; + + cancel_rearming_delayed_work(&priv->lec_arp_work); + + /* + * Remove all entries + */ + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { + lec_arp_remove(priv, entry); + lec_arp_put(entry); + } + INIT_HLIST_HEAD(&priv->lec_arp_tables[i]); + } + + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { + del_timer_sync(&entry->timer); + lec_arp_clear_vccs(entry); + hlist_del(&entry->next); + lec_arp_put(entry); + } + INIT_HLIST_HEAD(&priv->lec_arp_empty_ones); + + hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { + del_timer_sync(&entry->timer); + lec_arp_clear_vccs(entry); + hlist_del(&entry->next); + lec_arp_put(entry); + } + INIT_HLIST_HEAD(&priv->lec_no_forward); + + hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { + /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ + lec_arp_clear_vccs(entry); + hlist_del(&entry->next); + lec_arp_put(entry); + } + INIT_HLIST_HEAD(&priv->mcast_fwds); + priv->mcast_vcc = NULL; + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); +} + +/* + * Find entry by mac_address + */ +static struct lec_arp_table *lec_arp_find(struct lec_priv *priv, + const unsigned char *mac_addr) +{ + struct hlist_node *node; + struct hlist_head *head; + struct lec_arp_table *entry; + + pr_debug("LEC_ARP: lec_arp_find :%2.2x %2.2x %2.2x %2.2x %2.2x %2.2x\n", + mac_addr[0] & 0xff, mac_addr[1] & 0xff, mac_addr[2] & 0xff, + mac_addr[3] & 0xff, mac_addr[4] & 0xff, mac_addr[5] & 0xff); + + head = &priv->lec_arp_tables[HASH(mac_addr[ETH_ALEN - 1])]; + hlist_for_each_entry(entry, node, head, next) { + if (!compare_ether_addr(mac_addr, entry->mac_addr)) { + return entry; + } + } + return NULL; +} + +static struct lec_arp_table *make_entry(struct lec_priv *priv, + const unsigned char *mac_addr) +{ + struct lec_arp_table *to_return; + + to_return = kzalloc(sizeof(struct lec_arp_table), GFP_ATOMIC); + if (!to_return) { + printk("LEC: Arp entry kmalloc failed\n"); + return NULL; + } + memcpy(to_return->mac_addr, mac_addr, ETH_ALEN); + INIT_HLIST_NODE(&to_return->next); + setup_timer(&to_return->timer, lec_arp_expire_arp, + (unsigned long)to_return); + to_return->last_used = jiffies; + to_return->priv = priv; + skb_queue_head_init(&to_return->tx_wait); + atomic_set(&to_return->usage, 1); + return to_return; +} + +/* Arp sent timer expired */ +static void lec_arp_expire_arp(unsigned long data) +{ + struct lec_arp_table *entry; + + entry = (struct lec_arp_table *)data; + + pr_debug("lec_arp_expire_arp\n"); + if (entry->status == ESI_ARP_PENDING) { + if (entry->no_tries <= entry->priv->max_retry_count) { + if (entry->is_rdesc) + send_to_lecd(entry->priv, l_rdesc_arp_xmt, + entry->mac_addr, NULL, NULL); + else + send_to_lecd(entry->priv, l_arp_xmt, + entry->mac_addr, NULL, NULL); + entry->no_tries++; + } + mod_timer(&entry->timer, jiffies + (1 * HZ)); + } +} + +/* Unknown/unused vcc expire, remove associated entry */ +static void lec_arp_expire_vcc(unsigned long data) +{ + unsigned long flags; + struct lec_arp_table *to_remove = (struct lec_arp_table *)data; + struct lec_priv *priv = (struct lec_priv *)to_remove->priv; + + del_timer(&to_remove->timer); + + pr_debug("LEC_ARP %p %p: lec_arp_expire_vcc vpi:%d vci:%d\n", + to_remove, priv, + to_remove->vcc ? to_remove->recv_vcc->vpi : 0, + to_remove->vcc ? to_remove->recv_vcc->vci : 0); + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + hlist_del(&to_remove->next); + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + + lec_arp_clear_vccs(to_remove); + lec_arp_put(to_remove); +} + +/* + * Expire entries. + * 1. Re-set timer + * 2. For each entry, delete entries that have aged past the age limit. + * 3. For each entry, depending on the status of the entry, perform + * the following maintenance. + * a. If status is ESI_VC_PENDING or ESI_ARP_PENDING then if the + * tick_count is above the max_unknown_frame_time, clear + * the tick_count to zero and clear the packets_flooded counter + * to zero. This supports the packet rate limit per address + * while flooding unknowns. + * b. If the status is ESI_FLUSH_PENDING and the tick_count is greater + * than or equal to the path_switching_delay, change the status + * to ESI_FORWARD_DIRECT. This causes the flush period to end + * regardless of the progress of the flush protocol. + */ +static void lec_arp_check_expire(struct work_struct *work) +{ + unsigned long flags; + struct lec_priv *priv = + container_of(work, struct lec_priv, lec_arp_work.work); + struct hlist_node *node, *next; + struct lec_arp_table *entry; + unsigned long now; + unsigned long time_to_check; + int i; + + pr_debug("lec_arp_check_expire %p\n", priv); + now = jiffies; +restart: + spin_lock_irqsave(&priv->lec_arp_lock, flags); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { + if ((entry->flags) & LEC_REMOTE_FLAG && + priv->topology_change) + time_to_check = priv->forward_delay_time; + else + time_to_check = priv->aging_time; + + pr_debug("About to expire: %lx - %lx > %lx\n", + now, entry->last_used, time_to_check); + if (time_after(now, entry->last_used + time_to_check) + && !(entry->flags & LEC_PERMANENT_FLAG) + && !(entry->mac_addr[0] & 0x01)) { /* LANE2: 7.1.20 */ + /* Remove entry */ + pr_debug("LEC:Entry timed out\n"); + lec_arp_remove(priv, entry); + lec_arp_put(entry); + } else { + /* Something else */ + if ((entry->status == ESI_VC_PENDING || + entry->status == ESI_ARP_PENDING) + && time_after_eq(now, + entry->timestamp + + priv-> + max_unknown_frame_time)) { + entry->timestamp = jiffies; + entry->packets_flooded = 0; + if (entry->status == ESI_VC_PENDING) + send_to_lecd(priv, l_svc_setup, + entry->mac_addr, + entry->atm_addr, + NULL); + } + if (entry->status == ESI_FLUSH_PENDING + && + time_after_eq(now, entry->timestamp + + priv->path_switching_delay)) { + struct sk_buff *skb; + struct atm_vcc *vcc = entry->vcc; + + lec_arp_hold(entry); + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) + lec_send(vcc, skb, entry->priv); + entry->last_used = jiffies; + entry->status = ESI_FORWARD_DIRECT; + lec_arp_put(entry); + goto restart; + } + } + } + } + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + + schedule_delayed_work(&priv->lec_arp_work, LEC_ARP_REFRESH_INTERVAL); +} + +/* + * Try to find vcc where mac_address is attached. + * + */ +static struct atm_vcc *lec_arp_resolve(struct lec_priv *priv, + const unsigned char *mac_to_find, int is_rdesc, + struct lec_arp_table **ret_entry) +{ + unsigned long flags; + struct lec_arp_table *entry; + struct atm_vcc *found; + + if (mac_to_find[0] & 0x01) { + switch (priv->lane_version) { + case 1: + return priv->mcast_vcc; + case 2: /* LANE2 wants arp for multicast addresses */ + if (!compare_ether_addr(mac_to_find, bus_mac)) + return priv->mcast_vcc; + break; + default: + break; + } + } + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + entry = lec_arp_find(priv, mac_to_find); + + if (entry) { + if (entry->status == ESI_FORWARD_DIRECT) { + /* Connection Ok */ + entry->last_used = jiffies; + lec_arp_hold(entry); + *ret_entry = entry; + found = entry->vcc; + goto out; + } + /* + * If the LE_ARP cache entry is still pending, reset count to 0 + * so another LE_ARP request can be made for this frame. + */ + if (entry->status == ESI_ARP_PENDING) { + entry->no_tries = 0; + } + /* + * Data direct VC not yet set up, check to see if the unknown + * frame count is greater than the limit. If the limit has + * not been reached, allow the caller to send packet to + * BUS. + */ + if (entry->status != ESI_FLUSH_PENDING && + entry->packets_flooded < + priv->maximum_unknown_frame_count) { + entry->packets_flooded++; + pr_debug("LEC_ARP: Flooding..\n"); + found = priv->mcast_vcc; + goto out; + } + /* + * We got here because entry->status == ESI_FLUSH_PENDING + * or BUS flood limit was reached for an entry which is + * in ESI_ARP_PENDING or ESI_VC_PENDING state. + */ + lec_arp_hold(entry); + *ret_entry = entry; + pr_debug("lec: entry->status %d entry->vcc %p\n", entry->status, + entry->vcc); + found = NULL; + } else { + /* No matching entry was found */ + entry = make_entry(priv, mac_to_find); + pr_debug("LEC_ARP: Making entry\n"); + if (!entry) { + found = priv->mcast_vcc; + goto out; + } + lec_arp_add(priv, entry); + /* We want arp-request(s) to be sent */ + entry->packets_flooded = 1; + entry->status = ESI_ARP_PENDING; + entry->no_tries = 1; + entry->last_used = entry->timestamp = jiffies; + entry->is_rdesc = is_rdesc; + if (entry->is_rdesc) + send_to_lecd(priv, l_rdesc_arp_xmt, mac_to_find, NULL, + NULL); + else + send_to_lecd(priv, l_arp_xmt, mac_to_find, NULL, NULL); + entry->timer.expires = jiffies + (1 * HZ); + entry->timer.function = lec_arp_expire_arp; + add_timer(&entry->timer); + found = priv->mcast_vcc; + } + +out: + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + return found; +} + +static int +lec_addr_delete(struct lec_priv *priv, const unsigned char *atm_addr, + unsigned long permanent) +{ + unsigned long flags; + struct hlist_node *node, *next; + struct lec_arp_table *entry; + int i; + + pr_debug("lec_addr_delete\n"); + spin_lock_irqsave(&priv->lec_arp_lock, flags); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { + if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN) + && (permanent || + !(entry->flags & LEC_PERMANENT_FLAG))) { + lec_arp_remove(priv, entry); + lec_arp_put(entry); + } + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + return 0; + } + } + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + return -1; +} + +/* + * Notifies: Response to arp_request (atm_addr != NULL) + */ +static void +lec_arp_update(struct lec_priv *priv, const unsigned char *mac_addr, + const unsigned char *atm_addr, unsigned long remoteflag, + unsigned int targetless_le_arp) +{ + unsigned long flags; + struct hlist_node *node, *next; + struct lec_arp_table *entry, *tmp; + int i; + + pr_debug("lec:%s", (targetless_le_arp) ? "targetless " : " "); + pr_debug("lec_arp_update mac:%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", + mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], + mac_addr[4], mac_addr[5]); + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + entry = lec_arp_find(priv, mac_addr); + if (entry == NULL && targetless_le_arp) + goto out; /* + * LANE2: ignore targetless LE_ARPs for which + * we have no entry in the cache. 7.1.30 + */ + if (!hlist_empty(&priv->lec_arp_empty_ones)) { + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { + if (memcmp(entry->atm_addr, atm_addr, ATM_ESA_LEN) == 0) { + hlist_del(&entry->next); + del_timer(&entry->timer); + tmp = lec_arp_find(priv, mac_addr); + if (tmp) { + del_timer(&tmp->timer); + tmp->status = ESI_FORWARD_DIRECT; + memcpy(tmp->atm_addr, atm_addr, ATM_ESA_LEN); + tmp->vcc = entry->vcc; + tmp->old_push = entry->old_push; + tmp->last_used = jiffies; + del_timer(&entry->timer); + lec_arp_put(entry); + entry = tmp; + } else { + entry->status = ESI_FORWARD_DIRECT; + memcpy(entry->mac_addr, mac_addr, ETH_ALEN); + entry->last_used = jiffies; + lec_arp_add(priv, entry); + } + if (remoteflag) + entry->flags |= LEC_REMOTE_FLAG; + else + entry->flags &= ~LEC_REMOTE_FLAG; + pr_debug("After update\n"); + dump_arp_table(priv); + goto out; + } + } + } + + entry = lec_arp_find(priv, mac_addr); + if (!entry) { + entry = make_entry(priv, mac_addr); + if (!entry) + goto out; + entry->status = ESI_UNKNOWN; + lec_arp_add(priv, entry); + /* Temporary, changes before end of function */ + } + memcpy(entry->atm_addr, atm_addr, ATM_ESA_LEN); + del_timer(&entry->timer); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry(tmp, node, &priv->lec_arp_tables[i], next) { + if (entry != tmp && + !memcmp(tmp->atm_addr, atm_addr, ATM_ESA_LEN)) { + /* Vcc to this host exists */ + if (tmp->status > ESI_VC_PENDING) { + /* + * ESI_FLUSH_PENDING, + * ESI_FORWARD_DIRECT + */ + entry->vcc = tmp->vcc; + entry->old_push = tmp->old_push; + } + entry->status = tmp->status; + break; + } + } + } + if (remoteflag) + entry->flags |= LEC_REMOTE_FLAG; + else + entry->flags &= ~LEC_REMOTE_FLAG; + if (entry->status == ESI_ARP_PENDING || entry->status == ESI_UNKNOWN) { + entry->status = ESI_VC_PENDING; + send_to_lecd(priv, l_svc_setup, entry->mac_addr, atm_addr, NULL); + } + pr_debug("After update2\n"); + dump_arp_table(priv); +out: + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); +} + +/* + * Notifies: Vcc setup ready + */ +static void +lec_vcc_added(struct lec_priv *priv, const struct atmlec_ioc *ioc_data, + struct atm_vcc *vcc, + void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb)) +{ + unsigned long flags; + struct hlist_node *node; + struct lec_arp_table *entry; + int i, found_entry = 0; + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + if (ioc_data->receive == 2) { + /* Vcc for Multicast Forward. No timer, LANEv2 7.1.20 and 2.3.5.3 */ + + pr_debug("LEC_ARP: Attaching mcast forward\n"); +#if 0 + entry = lec_arp_find(priv, bus_mac); + if (!entry) { + printk("LEC_ARP: Multicast entry not found!\n"); + goto out; + } + memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); + entry->recv_vcc = vcc; + entry->old_recv_push = old_push; +#endif + entry = make_entry(priv, bus_mac); + if (entry == NULL) + goto out; + del_timer(&entry->timer); + memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); + entry->recv_vcc = vcc; + entry->old_recv_push = old_push; + hlist_add_head(&entry->next, &priv->mcast_fwds); + goto out; + } else if (ioc_data->receive == 1) { + /* + * Vcc which we don't want to make default vcc, + * attach it anyway. + */ + pr_debug + ("LEC_ARP:Attaching data direct, not default: " + "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", + ioc_data->atm_addr[0], ioc_data->atm_addr[1], + ioc_data->atm_addr[2], ioc_data->atm_addr[3], + ioc_data->atm_addr[4], ioc_data->atm_addr[5], + ioc_data->atm_addr[6], ioc_data->atm_addr[7], + ioc_data->atm_addr[8], ioc_data->atm_addr[9], + ioc_data->atm_addr[10], ioc_data->atm_addr[11], + ioc_data->atm_addr[12], ioc_data->atm_addr[13], + ioc_data->atm_addr[14], ioc_data->atm_addr[15], + ioc_data->atm_addr[16], ioc_data->atm_addr[17], + ioc_data->atm_addr[18], ioc_data->atm_addr[19]); + entry = make_entry(priv, bus_mac); + if (entry == NULL) + goto out; + memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); + memset(entry->mac_addr, 0, ETH_ALEN); + entry->recv_vcc = vcc; + entry->old_recv_push = old_push; + entry->status = ESI_UNKNOWN; + entry->timer.expires = jiffies + priv->vcc_timeout_period; + entry->timer.function = lec_arp_expire_vcc; + hlist_add_head(&entry->next, &priv->lec_no_forward); + add_timer(&entry->timer); + dump_arp_table(priv); + goto out; + } + pr_debug + ("LEC_ARP:Attaching data direct, default: " + "%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x%2.2x\n", + ioc_data->atm_addr[0], ioc_data->atm_addr[1], + ioc_data->atm_addr[2], ioc_data->atm_addr[3], + ioc_data->atm_addr[4], ioc_data->atm_addr[5], + ioc_data->atm_addr[6], ioc_data->atm_addr[7], + ioc_data->atm_addr[8], ioc_data->atm_addr[9], + ioc_data->atm_addr[10], ioc_data->atm_addr[11], + ioc_data->atm_addr[12], ioc_data->atm_addr[13], + ioc_data->atm_addr[14], ioc_data->atm_addr[15], + ioc_data->atm_addr[16], ioc_data->atm_addr[17], + ioc_data->atm_addr[18], ioc_data->atm_addr[19]); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { + if (memcmp + (ioc_data->atm_addr, entry->atm_addr, + ATM_ESA_LEN) == 0) { + pr_debug("LEC_ARP: Attaching data direct\n"); + pr_debug("Currently -> Vcc: %d, Rvcc:%d\n", + entry->vcc ? entry->vcc->vci : 0, + entry->recv_vcc ? entry->recv_vcc-> + vci : 0); + found_entry = 1; + del_timer(&entry->timer); + entry->vcc = vcc; + entry->old_push = old_push; + if (entry->status == ESI_VC_PENDING) { + if (priv->maximum_unknown_frame_count + == 0) + entry->status = + ESI_FORWARD_DIRECT; + else { + entry->timestamp = jiffies; + entry->status = + ESI_FLUSH_PENDING; +#if 0 + send_to_lecd(priv, l_flush_xmt, + NULL, + entry->atm_addr, + NULL); +#endif + } + } else { + /* + * They were forming a connection + * to us, and we to them. Our + * ATM address is numerically lower + * than theirs, so we make connection + * we formed into default VCC (8.1.11). + * Connection they made gets torn + * down. This might confuse some + * clients. Can be changed if + * someone reports trouble... + */ + ; + } + } + } + } + if (found_entry) { + pr_debug("After vcc was added\n"); + dump_arp_table(priv); + goto out; + } + /* + * Not found, snatch address from first data packet that arrives + * from this vcc + */ + entry = make_entry(priv, bus_mac); + if (!entry) + goto out; + entry->vcc = vcc; + entry->old_push = old_push; + memcpy(entry->atm_addr, ioc_data->atm_addr, ATM_ESA_LEN); + memset(entry->mac_addr, 0, ETH_ALEN); + entry->status = ESI_UNKNOWN; + hlist_add_head(&entry->next, &priv->lec_arp_empty_ones); + entry->timer.expires = jiffies + priv->vcc_timeout_period; + entry->timer.function = lec_arp_expire_vcc; + add_timer(&entry->timer); + pr_debug("After vcc was added\n"); + dump_arp_table(priv); +out: + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); +} + +static void lec_flush_complete(struct lec_priv *priv, unsigned long tran_id) +{ + unsigned long flags; + struct hlist_node *node; + struct lec_arp_table *entry; + int i; + + pr_debug("LEC:lec_flush_complete %lx\n", tran_id); +restart: + spin_lock_irqsave(&priv->lec_arp_lock, flags); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { + if (entry->flush_tran_id == tran_id + && entry->status == ESI_FLUSH_PENDING) { + struct sk_buff *skb; + struct atm_vcc *vcc = entry->vcc; + + lec_arp_hold(entry); + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + while ((skb = skb_dequeue(&entry->tx_wait)) != NULL) + lec_send(vcc, skb, entry->priv); + entry->last_used = jiffies; + entry->status = ESI_FORWARD_DIRECT; + lec_arp_put(entry); + pr_debug("LEC_ARP: Flushed\n"); + goto restart; + } + } + } + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + dump_arp_table(priv); +} + +static void +lec_set_flush_tran_id(struct lec_priv *priv, + const unsigned char *atm_addr, unsigned long tran_id) +{ + unsigned long flags; + struct hlist_node *node; + struct lec_arp_table *entry; + int i; + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) + hlist_for_each_entry(entry, node, &priv->lec_arp_tables[i], next) { + if (!memcmp(atm_addr, entry->atm_addr, ATM_ESA_LEN)) { + entry->flush_tran_id = tran_id; + pr_debug("Set flush transaction id to %lx for %p\n", + tran_id, entry); + } + } + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); +} + +static int lec_mcast_make(struct lec_priv *priv, struct atm_vcc *vcc) +{ + unsigned long flags; + unsigned char mac_addr[] = { + 0xff, 0xff, 0xff, 0xff, 0xff, 0xff + }; + struct lec_arp_table *to_add; + struct lec_vcc_priv *vpriv; + int err = 0; + + if (!(vpriv = kmalloc(sizeof(struct lec_vcc_priv), GFP_KERNEL))) + return -ENOMEM; + vpriv->xoff = 0; + vpriv->old_pop = vcc->pop; + vcc->user_back = vpriv; + vcc->pop = lec_pop; + spin_lock_irqsave(&priv->lec_arp_lock, flags); + to_add = make_entry(priv, mac_addr); + if (!to_add) { + vcc->pop = vpriv->old_pop; + kfree(vpriv); + err = -ENOMEM; + goto out; + } + memcpy(to_add->atm_addr, vcc->remote.sas_addr.prv, ATM_ESA_LEN); + to_add->status = ESI_FORWARD_DIRECT; + to_add->flags |= LEC_PERMANENT_FLAG; + to_add->vcc = vcc; + to_add->old_push = vcc->push; + vcc->push = lec_push; + priv->mcast_vcc = vcc; + lec_arp_add(priv, to_add); +out: + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + return err; +} + +static void lec_vcc_close(struct lec_priv *priv, struct atm_vcc *vcc) +{ + unsigned long flags; + struct hlist_node *node, *next; + struct lec_arp_table *entry; + int i; + + pr_debug("LEC_ARP: lec_vcc_close vpi:%d vci:%d\n", vcc->vpi, vcc->vci); + dump_arp_table(priv); + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + + for (i = 0; i < LEC_ARP_TABLE_SIZE; i++) { + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_tables[i], next) { + if (vcc == entry->vcc) { + lec_arp_remove(priv, entry); + lec_arp_put(entry); + if (priv->mcast_vcc == vcc) { + priv->mcast_vcc = NULL; + } + } + } + } + + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { + if (entry->vcc == vcc) { + lec_arp_clear_vccs(entry); + del_timer(&entry->timer); + hlist_del(&entry->next); + lec_arp_put(entry); + } + } + + hlist_for_each_entry_safe(entry, node, next, &priv->lec_no_forward, next) { + if (entry->recv_vcc == vcc) { + lec_arp_clear_vccs(entry); + del_timer(&entry->timer); + hlist_del(&entry->next); + lec_arp_put(entry); + } + } + + hlist_for_each_entry_safe(entry, node, next, &priv->mcast_fwds, next) { + if (entry->recv_vcc == vcc) { + lec_arp_clear_vccs(entry); + /* No timer, LANEv2 7.1.20 and 2.3.5.3 */ + hlist_del(&entry->next); + lec_arp_put(entry); + } + } + + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); + dump_arp_table(priv); +} + +static void +lec_arp_check_empties(struct lec_priv *priv, + struct atm_vcc *vcc, struct sk_buff *skb) +{ + unsigned long flags; + struct hlist_node *node, *next; + struct lec_arp_table *entry, *tmp; + struct lecdatahdr_8023 *hdr = (struct lecdatahdr_8023 *)skb->data; + unsigned char *src; +#ifdef CONFIG_TR + struct lecdatahdr_8025 *tr_hdr = (struct lecdatahdr_8025 *)skb->data; + + if (priv->is_trdev) + src = tr_hdr->h_source; + else +#endif + src = hdr->h_source; + + spin_lock_irqsave(&priv->lec_arp_lock, flags); + hlist_for_each_entry_safe(entry, node, next, &priv->lec_arp_empty_ones, next) { + if (vcc == entry->vcc) { + del_timer(&entry->timer); + memcpy(entry->mac_addr, src, ETH_ALEN); + entry->status = ESI_FORWARD_DIRECT; + entry->last_used = jiffies; + /* We might have got an entry */ + if ((tmp = lec_arp_find(priv, src))) { + lec_arp_remove(priv, tmp); + lec_arp_put(tmp); + } + hlist_del(&entry->next); + lec_arp_add(priv, entry); + goto out; + } + } + pr_debug("LEC_ARP: Arp_check_empties: entry not found!\n"); +out: + spin_unlock_irqrestore(&priv->lec_arp_lock, flags); +} + +MODULE_LICENSE("GPL"); diff --git a/net/atm/lec.h b/net/atm/lec.h new file mode 100644 index 0000000..0d37668 --- /dev/null +++ b/net/atm/lec.h @@ -0,0 +1,156 @@ +/* + * Lan Emulation client header file + * + * Marko Kiiskila + */ + +#ifndef _LEC_H_ +#define _LEC_H_ + +#include +#include +#include + +#define LEC_HEADER_LEN 16 + +struct lecdatahdr_8023 { + __be16 le_header; + unsigned char h_dest[ETH_ALEN]; + unsigned char h_source[ETH_ALEN]; + __be16 h_type; +}; + +struct lecdatahdr_8025 { + __be16 le_header; + unsigned char ac_pad; + unsigned char fc; + unsigned char h_dest[ETH_ALEN]; + unsigned char h_source[ETH_ALEN]; +}; + +#define LEC_MINIMUM_8023_SIZE 62 +#define LEC_MINIMUM_8025_SIZE 16 + +/* + * Operations that LANE2 capable device can do. Two first functions + * are used to make the device do things. See spec 3.1.3 and 3.1.4. + * + * The third function is intented for the MPOA component sitting on + * top of the LANE device. The MPOA component assigns it's own function + * to (*associate_indicator)() and the LANE device will use that + * function to tell about TLVs it sees floating through. + * + */ +struct lane2_ops { + int (*resolve) (struct net_device *dev, const u8 *dst_mac, int force, + u8 **tlvs, u32 *sizeoftlvs); + int (*associate_req) (struct net_device *dev, const u8 *lan_dst, + const u8 *tlvs, u32 sizeoftlvs); + void (*associate_indicator) (struct net_device *dev, const u8 *mac_addr, + const u8 *tlvs, u32 sizeoftlvs); +}; + +/* + * ATM LAN Emulation supports both LLC & Dix Ethernet EtherType + * frames. + * + * 1. Dix Ethernet EtherType frames encoded by placing EtherType + * field in h_type field. Data follows immediatelly after header. + * 2. LLC Data frames whose total length, including LLC field and data, + * but not padding required to meet the minimum data frame length, + * is less than 1536(0x0600) MUST be encoded by placing that length + * in the h_type field. The LLC field follows header immediatelly. + * 3. LLC data frames longer than this maximum MUST be encoded by placing + * the value 0 in the h_type field. + * + */ + +/* Hash table size */ +#define LEC_ARP_TABLE_SIZE 16 + +struct lec_priv { + struct net_device_stats stats; + unsigned short lecid; /* Lecid of this client */ + struct hlist_head lec_arp_empty_ones; + /* Used for storing VCC's that don't have a MAC address attached yet */ + struct hlist_head lec_arp_tables[LEC_ARP_TABLE_SIZE]; + /* Actual LE ARP table */ + struct hlist_head lec_no_forward; + /* + * Used for storing VCC's (and forward packets from) which are to + * age out by not using them to forward packets. + * This is because to some LE clients there will be 2 VCCs. Only + * one of them gets used. + */ + struct hlist_head mcast_fwds; + /* + * With LANEv2 it is possible that BUS (or a special multicast server) + * establishes multiple Multicast Forward VCCs to us. This list + * collects all those VCCs. LANEv1 client has only one item in this + * list. These entries are not aged out. + */ + spinlock_t lec_arp_lock; + struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */ + struct atm_vcc *lecd; + struct delayed_work lec_arp_work; /* C10 */ + unsigned int maximum_unknown_frame_count; + /* + * Within the period of time defined by this variable, the client will send + * no more than C10 frames to BUS for a given unicast destination. (C11) + */ + unsigned long max_unknown_frame_time; + /* + * If no traffic has been sent in this vcc for this period of time, + * vcc will be torn down (C12) + */ + unsigned long vcc_timeout_period; + /* + * An LE Client MUST not retry an LE_ARP_REQUEST for a + * given frame's LAN Destination more than maximum retry count times, + * after the first LEC_ARP_REQUEST (C13) + */ + unsigned short max_retry_count; + /* + * Max time the client will maintain an entry in its arp cache in + * absence of a verification of that relationship (C17) + */ + unsigned long aging_time; + /* + * Max time the client will maintain an entry in cache when + * topology change flag is true (C18) + */ + unsigned long forward_delay_time; /* Topology change flag (C19) */ + int topology_change; + /* + * Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE + * cycle to take (C20) + */ + unsigned long arp_response_time; + /* + * Time limit ot wait to receive an LE_FLUSH_RESPONSE after the + * LE_FLUSH_REQUEST has been sent before taking recover action. (C21) + */ + unsigned long flush_timeout; + /* The time since sending a frame to the bus after which the + * LE Client may assume that the frame has been either discarded or + * delivered to the recipient (C22) + */ + unsigned long path_switching_delay; + + u8 *tlvs; /* LANE2: TLVs are new */ + u32 sizeoftlvs; /* The size of the tlv array in bytes */ + int lane_version; /* LANE2 */ + int itfnum; /* e.g. 2 for lec2, 5 for lec5 */ + struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */ + int is_proxy; /* bridge between ATM and Ethernet */ + int is_trdev; /* Device type, 0 = Ethernet, 1 = TokenRing */ +}; + +struct lec_vcc_priv { + void (*old_pop) (struct atm_vcc *vcc, struct sk_buff *skb); + int xoff; +}; + +#define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back)) + +#endif /* _LEC_H_ */ diff --git a/net/atm/lec_arpc.h b/net/atm/lec_arpc.h new file mode 100644 index 0000000..ec67435 --- /dev/null +++ b/net/atm/lec_arpc.h @@ -0,0 +1,96 @@ +/* + * Lec arp cache + * + * Marko Kiiskila + */ +#ifndef _LEC_ARP_H_ +#define _LEC_ARP_H_ +#include +#include +#include +#include + +struct lec_arp_table { + struct hlist_node next; /* Linked entry list */ + unsigned char atm_addr[ATM_ESA_LEN]; /* Atm address */ + unsigned char mac_addr[ETH_ALEN]; /* Mac address */ + int is_rdesc; /* Mac address is a route descriptor */ + struct atm_vcc *vcc; /* Vcc this entry is attached */ + struct atm_vcc *recv_vcc; /* Vcc we receive data from */ + + void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb); + /* Push that leads to daemon */ + + void (*old_recv_push) (struct atm_vcc *vcc, struct sk_buff *skb); + /* Push that leads to daemon */ + + unsigned long last_used; /* For expiry */ + unsigned long timestamp; /* Used for various timestamping things: + * 1. FLUSH started + * (status=ESI_FLUSH_PENDING) + * 2. Counting to + * max_unknown_frame_time + * (status=ESI_ARP_PENDING|| + * status=ESI_VC_PENDING) + */ + unsigned char no_tries; /* No of times arp retry has been tried */ + unsigned char status; /* Status of this entry */ + unsigned short flags; /* Flags for this entry */ + unsigned short packets_flooded; /* Data packets flooded */ + unsigned long flush_tran_id; /* Transaction id in flush protocol */ + struct timer_list timer; /* Arping timer */ + struct lec_priv *priv; /* Pointer back */ + u8 *tlvs; + u32 sizeoftlvs; /* + * LANE2: Each MAC address can have TLVs + * associated with it. sizeoftlvs tells the + * the length of the tlvs array + */ + struct sk_buff_head tx_wait; /* wait queue for outgoing packets */ + atomic_t usage; /* usage count */ +}; + +/* + * LANE2: Template tlv struct for accessing + * the tlvs in the lec_arp_table->tlvs array + */ +struct tlv { + u32 type; + u8 length; + u8 value[255]; +}; + +/* Status fields */ +#define ESI_UNKNOWN 0 /* + * Next packet sent to this mac address + * causes ARP-request to be sent + */ +#define ESI_ARP_PENDING 1 /* + * There is no ATM address associated with this + * 48-bit address. The LE-ARP protocol is in + * progress. + */ +#define ESI_VC_PENDING 2 /* + * There is a valid ATM address associated with + * this 48-bit address but there is no VC set + * up to that ATM address. The signaling + * protocol is in process. + */ +#define ESI_FLUSH_PENDING 4 /* + * The LEC has been notified of the FLUSH_START + * status and it is assumed that the flush + * protocol is in process. + */ +#define ESI_FORWARD_DIRECT 5 /* + * Either the Path Switching Delay (C22) has + * elapsed or the LEC has notified the Mapping + * that the flush protocol has completed. In + * either case, it is safe to forward packets + * to this address via the data direct VC. + */ + +/* Flag values */ +#define LEC_REMOTE_FLAG 0x0001 +#define LEC_PERMANENT_FLAG 0x0002 + +#endif /* _LEC_ARP_H_ */ diff --git a/net/atm/mpc.c b/net/atm/mpc.c new file mode 100644 index 0000000..11b16d1 --- /dev/null +++ b/net/atm/mpc.c @@ -0,0 +1,1506 @@ +#include +#include +#include +#include +#include +#include +#include + +/* We are an ethernet device */ +#include +#include +#include +#include +#include +#include +#include +#include +#include /* for ip_fast_csum() */ +#include +#include +#include + +/* And atm device */ +#include +#include +#include +/* Modular too */ +#include + +#include "lec.h" +#include "mpc.h" +#include "resources.h" + +/* + * mpc.c: Implementation of MPOA client kernel part + */ + +#if 0 +#define dprintk printk /* debug */ +#else +#define dprintk(format,args...) +#endif + +#if 0 +#define ddprintk printk /* more debug */ +#else +#define ddprintk(format,args...) +#endif + + + +#define MPOA_TAG_LEN 4 + +/* mpc_daemon -> kernel */ +static void MPOA_trigger_rcvd (struct k_message *msg, struct mpoa_client *mpc); +static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc); +static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); +static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc); +static void mps_death(struct k_message *msg, struct mpoa_client *mpc); +static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action); +static void MPOA_cache_impos_rcvd(struct k_message *msg, struct mpoa_client *mpc); +static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); +static void set_mps_mac_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc); + +static const uint8_t *copy_macs(struct mpoa_client *mpc, + const uint8_t *router_mac, + const uint8_t *tlvs, uint8_t mps_macs, + uint8_t device_type); +static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry); + +static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc); +static void mpoad_close(struct atm_vcc *vcc); +static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb); + +static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb); +static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev); +static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev); +static void mpc_timer_refresh(void); +static void mpc_cache_check( unsigned long checking_time ); + +static struct llc_snap_hdr llc_snap_mpoa_ctrl = { + 0xaa, 0xaa, 0x03, + {0x00, 0x00, 0x5e}, + {0x00, 0x03} /* For MPOA control PDUs */ +}; +static struct llc_snap_hdr llc_snap_mpoa_data = { + 0xaa, 0xaa, 0x03, + {0x00, 0x00, 0x00}, + {0x08, 0x00} /* This is for IP PDUs only */ +}; +static struct llc_snap_hdr llc_snap_mpoa_data_tagged = { + 0xaa, 0xaa, 0x03, + {0x00, 0x00, 0x00}, + {0x88, 0x4c} /* This is for tagged data PDUs */ +}; + +static struct notifier_block mpoa_notifier = { + mpoa_event_listener, + NULL, + 0 +}; + +struct mpoa_client *mpcs = NULL; /* FIXME */ +static struct atm_mpoa_qos *qos_head = NULL; +static DEFINE_TIMER(mpc_timer, NULL, 0, 0); + + +static struct mpoa_client *find_mpc_by_itfnum(int itf) +{ + struct mpoa_client *mpc; + + mpc = mpcs; /* our global linked list */ + while (mpc != NULL) { + if (mpc->dev_num == itf) + return mpc; + mpc = mpc->next; + } + + return NULL; /* not found */ +} + +static struct mpoa_client *find_mpc_by_vcc(struct atm_vcc *vcc) +{ + struct mpoa_client *mpc; + + mpc = mpcs; /* our global linked list */ + while (mpc != NULL) { + if (mpc->mpoad_vcc == vcc) + return mpc; + mpc = mpc->next; + } + + return NULL; /* not found */ +} + +static struct mpoa_client *find_mpc_by_lec(struct net_device *dev) +{ + struct mpoa_client *mpc; + + mpc = mpcs; /* our global linked list */ + while (mpc != NULL) { + if (mpc->dev == dev) + return mpc; + mpc = mpc->next; + } + + return NULL; /* not found */ +} + +/* + * Functions for managing QoS list + */ + +/* + * Overwrites the old entry or makes a new one. + */ +struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos) +{ + struct atm_mpoa_qos *entry; + + entry = atm_mpoa_search_qos(dst_ip); + if (entry != NULL) { + entry->qos = *qos; + return entry; + } + + entry = kmalloc(sizeof(struct atm_mpoa_qos), GFP_KERNEL); + if (entry == NULL) { + printk("mpoa: atm_mpoa_add_qos: out of memory\n"); + return entry; + } + + entry->ipaddr = dst_ip; + entry->qos = *qos; + + entry->next = qos_head; + qos_head = entry; + + return entry; +} + +struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip) +{ + struct atm_mpoa_qos *qos; + + qos = qos_head; + while( qos != NULL ){ + if(qos->ipaddr == dst_ip) { + break; + } + qos = qos->next; + } + + return qos; +} + +/* + * Returns 0 for failure + */ +int atm_mpoa_delete_qos(struct atm_mpoa_qos *entry) +{ + + struct atm_mpoa_qos *curr; + + if (entry == NULL) return 0; + if (entry == qos_head) { + qos_head = qos_head->next; + kfree(entry); + return 1; + } + + curr = qos_head; + while (curr != NULL) { + if (curr->next == entry) { + curr->next = entry->next; + kfree(entry); + return 1; + } + curr = curr->next; + } + + return 0; +} + +/* this is buggered - we need locking for qos_head */ +void atm_mpoa_disp_qos(struct seq_file *m) +{ + struct atm_mpoa_qos *qos; + + qos = qos_head; + seq_printf(m, "QoS entries for shortcuts:\n"); + seq_printf(m, "IP address\n TX:max_pcr pcr min_pcr max_cdv max_sdu\n RX:max_pcr pcr min_pcr max_cdv max_sdu\n"); + + while (qos != NULL) { + seq_printf(m, "%u.%u.%u.%u\n %-7d %-7d %-7d %-7d %-7d\n %-7d %-7d %-7d %-7d %-7d\n", + NIPQUAD(qos->ipaddr), + qos->qos.txtp.max_pcr, qos->qos.txtp.pcr, qos->qos.txtp.min_pcr, qos->qos.txtp.max_cdv, qos->qos.txtp.max_sdu, + qos->qos.rxtp.max_pcr, qos->qos.rxtp.pcr, qos->qos.rxtp.min_pcr, qos->qos.rxtp.max_cdv, qos->qos.rxtp.max_sdu); + qos = qos->next; + } +} + +static struct net_device *find_lec_by_itfnum(int itf) +{ + struct net_device *dev; + char name[IFNAMSIZ]; + + sprintf(name, "lec%d", itf); + dev = dev_get_by_name(&init_net, name); + + return dev; +} + +static struct mpoa_client *alloc_mpc(void) +{ + struct mpoa_client *mpc; + + mpc = kzalloc(sizeof (struct mpoa_client), GFP_KERNEL); + if (mpc == NULL) + return NULL; + rwlock_init(&mpc->ingress_lock); + rwlock_init(&mpc->egress_lock); + mpc->next = mpcs; + atm_mpoa_init_cache(mpc); + + mpc->parameters.mpc_p1 = MPC_P1; + mpc->parameters.mpc_p2 = MPC_P2; + memset(mpc->parameters.mpc_p3,0,sizeof(mpc->parameters.mpc_p3)); + mpc->parameters.mpc_p4 = MPC_P4; + mpc->parameters.mpc_p5 = MPC_P5; + mpc->parameters.mpc_p6 = MPC_P6; + + mpcs = mpc; + + return mpc; +} + +/* + * + * start_mpc() puts the MPC on line. All the packets destined + * to the lec underneath us are now being monitored and + * shortcuts will be established. + * + */ +static void start_mpc(struct mpoa_client *mpc, struct net_device *dev) +{ + + dprintk("mpoa: (%s) start_mpc:\n", mpc->dev->name); + if (dev->hard_start_xmit == NULL) { + printk("mpoa: (%s) start_mpc: dev->hard_start_xmit == NULL, not starting\n", + dev->name); + return; + } + mpc->old_hard_start_xmit = dev->hard_start_xmit; + dev->hard_start_xmit = mpc_send_packet; + + return; +} + +static void stop_mpc(struct mpoa_client *mpc) +{ + + dprintk("mpoa: (%s) stop_mpc:", mpc->dev->name); + + /* Lets not nullify lec device's dev->hard_start_xmit */ + if (mpc->dev->hard_start_xmit != mpc_send_packet) { + dprintk(" mpc already stopped, not fatal\n"); + return; + } + dprintk("\n"); + mpc->dev->hard_start_xmit = mpc->old_hard_start_xmit; + mpc->old_hard_start_xmit = NULL; + /* close_shortcuts(mpc); ??? FIXME */ + + return; +} + +static const char *mpoa_device_type_string(char type) __attribute__ ((unused)); + +static const char *mpoa_device_type_string(char type) +{ + switch(type) { + case NON_MPOA: + return "non-MPOA device"; + break; + case MPS: + return "MPS"; + break; + case MPC: + return "MPC"; + break; + case MPS_AND_MPC: + return "both MPS and MPC"; + break; + default: + return "unspecified (non-MPOA) device"; + break; + } + + return ""; /* not reached */ +} + +/* + * lec device calls this via its dev->priv->lane2_ops->associate_indicator() + * when it sees a TLV in LE_ARP packet. + * We fill in the pointer above when we see a LANE2 lec initializing + * See LANE2 spec 3.1.5 + * + * Quite a big and ugly function but when you look at it + * all it does is to try to locate and parse MPOA Device + * Type TLV. + * We give our lec a pointer to this function and when the + * lec sees a TLV it uses the pointer to call this function. + * + */ +static void lane2_assoc_ind(struct net_device *dev, const u8 *mac_addr, + const u8 *tlvs, u32 sizeoftlvs) +{ + uint32_t type; + uint8_t length, mpoa_device_type, number_of_mps_macs; + const uint8_t *end_of_tlvs; + struct mpoa_client *mpc; + + mpoa_device_type = number_of_mps_macs = 0; /* silence gcc */ + dprintk("mpoa: (%s) lane2_assoc_ind: received TLV(s), ", dev->name); + dprintk("total length of all TLVs %d\n", sizeoftlvs); + mpc = find_mpc_by_lec(dev); /* Sampo-Fix: moved here from below */ + if (mpc == NULL) { + printk("mpoa: (%s) lane2_assoc_ind: no mpc\n", dev->name); + return; + } + end_of_tlvs = tlvs + sizeoftlvs; + while (end_of_tlvs - tlvs >= 5) { + type = (tlvs[0] << 24) | (tlvs[1] << 16) | (tlvs[2] << 8) | tlvs[3]; + length = tlvs[4]; + tlvs += 5; + dprintk(" type 0x%x length %02x\n", type, length); + if (tlvs + length > end_of_tlvs) { + printk("TLV value extends past its buffer, aborting parse\n"); + return; + } + + if (type == 0) { + printk("mpoa: (%s) lane2_assoc_ind: TLV type was 0, returning\n", dev->name); + return; + } + + if (type != TLV_MPOA_DEVICE_TYPE) { + tlvs += length; + continue; /* skip other TLVs */ + } + mpoa_device_type = *tlvs++; + number_of_mps_macs = *tlvs++; + dprintk("mpoa: (%s) MPOA device type '%s', ", dev->name, mpoa_device_type_string(mpoa_device_type)); + if (mpoa_device_type == MPS_AND_MPC && + length < (42 + number_of_mps_macs*ETH_ALEN)) { /* :) */ + printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", + dev->name); + continue; + } + if ((mpoa_device_type == MPS || mpoa_device_type == MPC) + && length < 22 + number_of_mps_macs*ETH_ALEN) { + printk("\nmpoa: (%s) lane2_assoc_ind: short MPOA Device Type TLV\n", + dev->name); + continue; + } + if (mpoa_device_type != MPS && mpoa_device_type != MPS_AND_MPC) { + dprintk("ignoring non-MPS device\n"); + if (mpoa_device_type == MPC) tlvs += 20; + continue; /* we are only interested in MPSs */ + } + if (number_of_mps_macs == 0 && mpoa_device_type == MPS_AND_MPC) { + printk("\nmpoa: (%s) lane2_assoc_ind: MPS_AND_MPC has zero MACs\n", dev->name); + continue; /* someone should read the spec */ + } + dprintk("this MPS has %d MAC addresses\n", number_of_mps_macs); + + /* ok, now we can go and tell our daemon the control address of MPS */ + send_set_mps_ctrl_addr(tlvs, mpc); + + tlvs = copy_macs(mpc, mac_addr, tlvs, number_of_mps_macs, mpoa_device_type); + if (tlvs == NULL) return; + } + if (end_of_tlvs - tlvs != 0) + printk("mpoa: (%s) lane2_assoc_ind: ignoring %Zd bytes of trailing TLV carbage\n", + dev->name, end_of_tlvs - tlvs); + return; +} + +/* + * Store at least advertizing router's MAC address + * plus the possible MAC address(es) to mpc->mps_macs. + * For a freshly allocated MPOA client mpc->mps_macs == 0. + */ +static const uint8_t *copy_macs(struct mpoa_client *mpc, + const uint8_t *router_mac, + const uint8_t *tlvs, uint8_t mps_macs, + uint8_t device_type) +{ + int num_macs; + num_macs = (mps_macs > 1) ? mps_macs : 1; + + if (mpc->number_of_mps_macs != num_macs) { /* need to reallocate? */ + if (mpc->number_of_mps_macs != 0) kfree(mpc->mps_macs); + mpc->number_of_mps_macs = 0; + mpc->mps_macs = kmalloc(num_macs*ETH_ALEN, GFP_KERNEL); + if (mpc->mps_macs == NULL) { + printk("mpoa: (%s) copy_macs: out of mem\n", mpc->dev->name); + return NULL; + } + } + memcpy(mpc->mps_macs, router_mac, ETH_ALEN); + tlvs += 20; if (device_type == MPS_AND_MPC) tlvs += 20; + if (mps_macs > 0) + memcpy(mpc->mps_macs, tlvs, mps_macs*ETH_ALEN); + tlvs += mps_macs*ETH_ALEN; + mpc->number_of_mps_macs = num_macs; + + return tlvs; +} + +static int send_via_shortcut(struct sk_buff *skb, struct mpoa_client *mpc) +{ + in_cache_entry *entry; + struct iphdr *iph; + char *buff; + __be32 ipaddr = 0; + + static struct { + struct llc_snap_hdr hdr; + __be32 tag; + } tagged_llc_snap_hdr = { + {0xaa, 0xaa, 0x03, {0x00, 0x00, 0x00}, {0x88, 0x4c}}, + 0 + }; + + buff = skb->data + mpc->dev->hard_header_len; + iph = (struct iphdr *)buff; + ipaddr = iph->daddr; + + ddprintk("mpoa: (%s) send_via_shortcut: ipaddr 0x%x\n", mpc->dev->name, ipaddr); + + entry = mpc->in_ops->get(ipaddr, mpc); + if (entry == NULL) { + entry = mpc->in_ops->add_entry(ipaddr, mpc); + if (entry != NULL) mpc->in_ops->put(entry); + return 1; + } + if (mpc->in_ops->cache_hit(entry, mpc) != OPEN){ /* threshold not exceeded or VCC not ready */ + ddprintk("mpoa: (%s) send_via_shortcut: cache_hit: returns != OPEN\n", mpc->dev->name); + mpc->in_ops->put(entry); + return 1; + } + + ddprintk("mpoa: (%s) send_via_shortcut: using shortcut\n", mpc->dev->name); + /* MPOA spec A.1.4, MPOA client must decrement IP ttl at least by one */ + if (iph->ttl <= 1) { + ddprintk("mpoa: (%s) send_via_shortcut: IP ttl = %u, using LANE\n", mpc->dev->name, iph->ttl); + mpc->in_ops->put(entry); + return 1; + } + iph->ttl--; + iph->check = 0; + iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl); + + if (entry->ctrl_info.tag != 0) { + ddprintk("mpoa: (%s) send_via_shortcut: adding tag 0x%x\n", mpc->dev->name, entry->ctrl_info.tag); + tagged_llc_snap_hdr.tag = entry->ctrl_info.tag; + skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ + skb_push(skb, sizeof(tagged_llc_snap_hdr)); /* add LLC/SNAP header */ + skb_copy_to_linear_data(skb, &tagged_llc_snap_hdr, + sizeof(tagged_llc_snap_hdr)); + } else { + skb_pull(skb, ETH_HLEN); /* get rid of Eth header */ + skb_push(skb, sizeof(struct llc_snap_hdr)); /* add LLC/SNAP header + tag */ + skb_copy_to_linear_data(skb, &llc_snap_mpoa_data, + sizeof(struct llc_snap_hdr)); + } + + atomic_add(skb->truesize, &sk_atm(entry->shortcut)->sk_wmem_alloc); + ATM_SKB(skb)->atm_options = entry->shortcut->atm_options; + entry->shortcut->send(entry->shortcut, skb); + entry->packets_fwded++; + mpc->in_ops->put(entry); + + return 0; +} + +/* + * Probably needs some error checks and locking, not sure... + */ +static int mpc_send_packet(struct sk_buff *skb, struct net_device *dev) +{ + int retval; + struct mpoa_client *mpc; + struct ethhdr *eth; + int i = 0; + + mpc = find_mpc_by_lec(dev); /* this should NEVER fail */ + if(mpc == NULL) { + printk("mpoa: (%s) mpc_send_packet: no MPC found\n", dev->name); + goto non_ip; + } + + eth = (struct ethhdr *)skb->data; + if (eth->h_proto != htons(ETH_P_IP)) + goto non_ip; /* Multi-Protocol Over ATM :-) */ + + /* Weed out funny packets (e.g., AF_PACKET or raw). */ + if (skb->len < ETH_HLEN + sizeof(struct iphdr)) + goto non_ip; + skb_set_network_header(skb, ETH_HLEN); + if (skb->len < ETH_HLEN + ip_hdr(skb)->ihl * 4 || ip_hdr(skb)->ihl < 5) + goto non_ip; + + while (i < mpc->number_of_mps_macs) { + if (!compare_ether_addr(eth->h_dest, (mpc->mps_macs + i*ETH_ALEN))) + if ( send_via_shortcut(skb, mpc) == 0 ) /* try shortcut */ + return 0; /* success! */ + i++; + } + + non_ip: + retval = mpc->old_hard_start_xmit(skb,dev); + + return retval; +} + +static int atm_mpoa_vcc_attach(struct atm_vcc *vcc, void __user *arg) +{ + int bytes_left; + struct mpoa_client *mpc; + struct atmmpc_ioc ioc_data; + in_cache_entry *in_entry; + __be32 ipaddr; + + bytes_left = copy_from_user(&ioc_data, arg, sizeof(struct atmmpc_ioc)); + if (bytes_left != 0) { + printk("mpoa: mpc_vcc_attach: Short read (missed %d bytes) from userland\n", bytes_left); + return -EFAULT; + } + ipaddr = ioc_data.ipaddr; + if (ioc_data.dev_num < 0 || ioc_data.dev_num >= MAX_LEC_ITF) + return -EINVAL; + + mpc = find_mpc_by_itfnum(ioc_data.dev_num); + if (mpc == NULL) + return -EINVAL; + + if (ioc_data.type == MPC_SOCKET_INGRESS) { + in_entry = mpc->in_ops->get(ipaddr, mpc); + if (in_entry == NULL || in_entry->entry_state < INGRESS_RESOLVED) { + printk("mpoa: (%s) mpc_vcc_attach: did not find RESOLVED entry from ingress cache\n", + mpc->dev->name); + if (in_entry != NULL) mpc->in_ops->put(in_entry); + return -EINVAL; + } + printk("mpoa: (%s) mpc_vcc_attach: attaching ingress SVC, entry = %u.%u.%u.%u\n", + mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip)); + in_entry->shortcut = vcc; + mpc->in_ops->put(in_entry); + } else { + printk("mpoa: (%s) mpc_vcc_attach: attaching egress SVC\n", mpc->dev->name); + } + + vcc->proto_data = mpc->dev; + vcc->push = mpc_push; + + return 0; +} + +/* + * + */ +static void mpc_vcc_close(struct atm_vcc *vcc, struct net_device *dev) +{ + struct mpoa_client *mpc; + in_cache_entry *in_entry; + eg_cache_entry *eg_entry; + + mpc = find_mpc_by_lec(dev); + if (mpc == NULL) { + printk("mpoa: (%s) mpc_vcc_close: close for unknown MPC\n", dev->name); + return; + } + + dprintk("mpoa: (%s) mpc_vcc_close:\n", dev->name); + in_entry = mpc->in_ops->get_by_vcc(vcc, mpc); + if (in_entry) { + dprintk("mpoa: (%s) mpc_vcc_close: ingress SVC closed ip = %u.%u.%u.%u\n", + mpc->dev->name, NIPQUAD(in_entry->ctrl_info.in_dst_ip)); + in_entry->shortcut = NULL; + mpc->in_ops->put(in_entry); + } + eg_entry = mpc->eg_ops->get_by_vcc(vcc, mpc); + if (eg_entry) { + dprintk("mpoa: (%s) mpc_vcc_close: egress SVC closed\n", mpc->dev->name); + eg_entry->shortcut = NULL; + mpc->eg_ops->put(eg_entry); + } + + if (in_entry == NULL && eg_entry == NULL) + dprintk("mpoa: (%s) mpc_vcc_close: unused vcc closed\n", dev->name); + + return; +} + +static void mpc_push(struct atm_vcc *vcc, struct sk_buff *skb) +{ + struct net_device *dev = (struct net_device *)vcc->proto_data; + struct sk_buff *new_skb; + eg_cache_entry *eg; + struct mpoa_client *mpc; + __be32 tag; + char *tmp; + + ddprintk("mpoa: (%s) mpc_push:\n", dev->name); + if (skb == NULL) { + dprintk("mpoa: (%s) mpc_push: null skb, closing VCC\n", dev->name); + mpc_vcc_close(vcc, dev); + return; + } + + skb->dev = dev; + if (memcmp(skb->data, &llc_snap_mpoa_ctrl, sizeof(struct llc_snap_hdr)) == 0) { + struct sock *sk = sk_atm(vcc); + + dprintk("mpoa: (%s) mpc_push: control packet arrived\n", dev->name); + /* Pass control packets to daemon */ + skb_queue_tail(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); + return; + } + + /* data coming over the shortcut */ + atm_return(vcc, skb->truesize); + + mpc = find_mpc_by_lec(dev); + if (mpc == NULL) { + printk("mpoa: (%s) mpc_push: unknown MPC\n", dev->name); + return; + } + + if (memcmp(skb->data, &llc_snap_mpoa_data_tagged, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA tagged data */ + ddprintk("mpoa: (%s) mpc_push: tagged data packet arrived\n", dev->name); + + } else if (memcmp(skb->data, &llc_snap_mpoa_data, sizeof(struct llc_snap_hdr)) == 0) { /* MPOA data */ + printk("mpoa: (%s) mpc_push: non-tagged data packet arrived\n", dev->name); + printk(" mpc_push: non-tagged data unsupported, purging\n"); + dev_kfree_skb_any(skb); + return; + } else { + printk("mpoa: (%s) mpc_push: garbage arrived, purging\n", dev->name); + dev_kfree_skb_any(skb); + return; + } + + tmp = skb->data + sizeof(struct llc_snap_hdr); + tag = *(__be32 *)tmp; + + eg = mpc->eg_ops->get_by_tag(tag, mpc); + if (eg == NULL) { + printk("mpoa: (%s) mpc_push: Didn't find egress cache entry, tag = %u\n", + dev->name,tag); + purge_egress_shortcut(vcc, NULL); + dev_kfree_skb_any(skb); + return; + } + + /* + * See if ingress MPC is using shortcut we opened as a return channel. + * This means we have a bi-directional vcc opened by us. + */ + if (eg->shortcut == NULL) { + eg->shortcut = vcc; + printk("mpoa: (%s) mpc_push: egress SVC in use\n", dev->name); + } + + skb_pull(skb, sizeof(struct llc_snap_hdr) + sizeof(tag)); /* get rid of LLC/SNAP header */ + new_skb = skb_realloc_headroom(skb, eg->ctrl_info.DH_length); /* LLC/SNAP is shorter than MAC header :( */ + dev_kfree_skb_any(skb); + if (new_skb == NULL){ + mpc->eg_ops->put(eg); + return; + } + skb_push(new_skb, eg->ctrl_info.DH_length); /* add MAC header */ + skb_copy_to_linear_data(new_skb, eg->ctrl_info.DLL_header, + eg->ctrl_info.DH_length); + new_skb->protocol = eth_type_trans(new_skb, dev); + skb_reset_network_header(new_skb); + + eg->latest_ip_addr = ip_hdr(new_skb)->saddr; + eg->packets_rcvd++; + mpc->eg_ops->put(eg); + + memset(ATM_SKB(skb), 0, sizeof(struct atm_skb_data)); + netif_rx(new_skb); + + return; +} + +static struct atmdev_ops mpc_ops = { /* only send is required */ + .close = mpoad_close, + .send = msg_from_mpoad +}; + +static struct atm_dev mpc_dev = { + .ops = &mpc_ops, + .type = "mpc", + .number = 42, + .lock = __SPIN_LOCK_UNLOCKED(mpc_dev.lock) + /* members not explicitly initialised will be 0 */ +}; + +static int atm_mpoa_mpoad_attach (struct atm_vcc *vcc, int arg) +{ + struct mpoa_client *mpc; + struct lec_priv *priv; + int err; + + if (mpcs == NULL) { + init_timer(&mpc_timer); + mpc_timer_refresh(); + + /* This lets us now how our LECs are doing */ + err = register_netdevice_notifier(&mpoa_notifier); + if (err < 0) { + del_timer(&mpc_timer); + return err; + } + } + + mpc = find_mpc_by_itfnum(arg); + if (mpc == NULL) { + dprintk("mpoa: mpoad_attach: allocating new mpc for itf %d\n", arg); + mpc = alloc_mpc(); + if (mpc == NULL) + return -ENOMEM; + mpc->dev_num = arg; + mpc->dev = find_lec_by_itfnum(arg); /* NULL if there was no lec */ + } + if (mpc->mpoad_vcc) { + printk("mpoa: mpoad_attach: mpoad is already present for itf %d\n", arg); + return -EADDRINUSE; + } + + if (mpc->dev) { /* check if the lec is LANE2 capable */ + priv = (struct lec_priv *)mpc->dev->priv; + if (priv->lane_version < 2) { + dev_put(mpc->dev); + mpc->dev = NULL; + } else + priv->lane2_ops->associate_indicator = lane2_assoc_ind; + } + + mpc->mpoad_vcc = vcc; + vcc->dev = &mpc_dev; + vcc_insert_socket(sk_atm(vcc)); + set_bit(ATM_VF_META,&vcc->flags); + set_bit(ATM_VF_READY,&vcc->flags); + + if (mpc->dev) { + char empty[ATM_ESA_LEN]; + memset(empty, 0, ATM_ESA_LEN); + + start_mpc(mpc, mpc->dev); + /* set address if mpcd e.g. gets killed and restarted. + * If we do not do it now we have to wait for the next LE_ARP + */ + if ( memcmp(mpc->mps_ctrl_addr, empty, ATM_ESA_LEN) != 0 ) + send_set_mps_ctrl_addr(mpc->mps_ctrl_addr, mpc); + } + + __module_get(THIS_MODULE); + return arg; +} + +static void send_set_mps_ctrl_addr(const char *addr, struct mpoa_client *mpc) +{ + struct k_message mesg; + + memcpy (mpc->mps_ctrl_addr, addr, ATM_ESA_LEN); + + mesg.type = SET_MPS_CTRL_ADDR; + memcpy(mesg.MPS_ctrl, addr, ATM_ESA_LEN); + msg_to_mpoad(&mesg, mpc); + + return; +} + +static void mpoad_close(struct atm_vcc *vcc) +{ + struct mpoa_client *mpc; + struct sk_buff *skb; + + mpc = find_mpc_by_vcc(vcc); + if (mpc == NULL) { + printk("mpoa: mpoad_close: did not find MPC\n"); + return; + } + if (!mpc->mpoad_vcc) { + printk("mpoa: mpoad_close: close for non-present mpoad\n"); + return; + } + + mpc->mpoad_vcc = NULL; + if (mpc->dev) { + struct lec_priv *priv = (struct lec_priv *)mpc->dev->priv; + priv->lane2_ops->associate_indicator = NULL; + stop_mpc(mpc); + dev_put(mpc->dev); + } + + mpc->in_ops->destroy_cache(mpc); + mpc->eg_ops->destroy_cache(mpc); + + while ((skb = skb_dequeue(&sk_atm(vcc)->sk_receive_queue))) { + atm_return(vcc, skb->truesize); + kfree_skb(skb); + } + + printk("mpoa: (%s) going down\n", + (mpc->dev) ? mpc->dev->name : ""); + module_put(THIS_MODULE); + + return; +} + +/* + * + */ +static int msg_from_mpoad(struct atm_vcc *vcc, struct sk_buff *skb) +{ + + struct mpoa_client *mpc = find_mpc_by_vcc(vcc); + struct k_message *mesg = (struct k_message*)skb->data; + atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); + + if (mpc == NULL) { + printk("mpoa: msg_from_mpoad: no mpc found\n"); + return 0; + } + dprintk("mpoa: (%s) msg_from_mpoad:", (mpc->dev) ? mpc->dev->name : ""); + switch(mesg->type) { + case MPOA_RES_REPLY_RCVD: + dprintk(" mpoa_res_reply_rcvd\n"); + MPOA_res_reply_rcvd(mesg, mpc); + break; + case MPOA_TRIGGER_RCVD: + dprintk(" mpoa_trigger_rcvd\n"); + MPOA_trigger_rcvd(mesg, mpc); + break; + case INGRESS_PURGE_RCVD: + dprintk(" nhrp_purge_rcvd\n"); + ingress_purge_rcvd(mesg, mpc); + break; + case EGRESS_PURGE_RCVD: + dprintk(" egress_purge_reply_rcvd\n"); + egress_purge_rcvd(mesg, mpc); + break; + case MPS_DEATH: + dprintk(" mps_death\n"); + mps_death(mesg, mpc); + break; + case CACHE_IMPOS_RCVD: + dprintk(" cache_impos_rcvd\n"); + MPOA_cache_impos_rcvd(mesg, mpc); + break; + case SET_MPC_CTRL_ADDR: + dprintk(" set_mpc_ctrl_addr\n"); + set_mpc_ctrl_addr_rcvd(mesg, mpc); + break; + case SET_MPS_MAC_ADDR: + dprintk(" set_mps_mac_addr\n"); + set_mps_mac_addr_rcvd(mesg, mpc); + break; + case CLEAN_UP_AND_EXIT: + dprintk(" clean_up_and_exit\n"); + clean_up(mesg, mpc, DIE); + break; + case RELOAD: + dprintk(" reload\n"); + clean_up(mesg, mpc, RELOAD); + break; + case SET_MPC_PARAMS: + dprintk(" set_mpc_params\n"); + mpc->parameters = mesg->content.params; + break; + default: + dprintk(" unknown message %d\n", mesg->type); + break; + } + kfree_skb(skb); + + return 0; +} + +/* Remember that this function may not do things that sleep */ +int msg_to_mpoad(struct k_message *mesg, struct mpoa_client *mpc) +{ + struct sk_buff *skb; + struct sock *sk; + + if (mpc == NULL || !mpc->mpoad_vcc) { + printk("mpoa: msg_to_mpoad: mesg %d to a non-existent mpoad\n", mesg->type); + return -ENXIO; + } + + skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); + if (skb == NULL) + return -ENOMEM; + skb_put(skb, sizeof(struct k_message)); + skb_copy_to_linear_data(skb, mesg, sizeof(*mesg)); + atm_force_charge(mpc->mpoad_vcc, skb->truesize); + + sk = sk_atm(mpc->mpoad_vcc); + skb_queue_tail(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); + + return 0; +} + +static int mpoa_event_listener(struct notifier_block *mpoa_notifier, unsigned long event, void *dev_ptr) +{ + struct net_device *dev; + struct mpoa_client *mpc; + struct lec_priv *priv; + + dev = (struct net_device *)dev_ptr; + + if (!net_eq(dev_net(dev), &init_net)) + return NOTIFY_DONE; + + if (dev->name == NULL || strncmp(dev->name, "lec", 3)) + return NOTIFY_DONE; /* we are only interested in lec:s */ + + switch (event) { + case NETDEV_REGISTER: /* a new lec device was allocated */ + priv = (struct lec_priv *)dev->priv; + if (priv->lane_version < 2) + break; + priv->lane2_ops->associate_indicator = lane2_assoc_ind; + mpc = find_mpc_by_itfnum(priv->itfnum); + if (mpc == NULL) { + dprintk("mpoa: mpoa_event_listener: allocating new mpc for %s\n", + dev->name); + mpc = alloc_mpc(); + if (mpc == NULL) { + printk("mpoa: mpoa_event_listener: no new mpc"); + break; + } + } + mpc->dev_num = priv->itfnum; + mpc->dev = dev; + dev_hold(dev); + dprintk("mpoa: (%s) was initialized\n", dev->name); + break; + case NETDEV_UNREGISTER: + /* the lec device was deallocated */ + mpc = find_mpc_by_lec(dev); + if (mpc == NULL) + break; + dprintk("mpoa: device (%s) was deallocated\n", dev->name); + stop_mpc(mpc); + dev_put(mpc->dev); + mpc->dev = NULL; + break; + case NETDEV_UP: + /* the dev was ifconfig'ed up */ + mpc = find_mpc_by_lec(dev); + if (mpc == NULL) + break; + if (mpc->mpoad_vcc != NULL) { + start_mpc(mpc, dev); + } + break; + case NETDEV_DOWN: + /* the dev was ifconfig'ed down */ + /* this means that the flow of packets from the + * upper layer stops + */ + mpc = find_mpc_by_lec(dev); + if (mpc == NULL) + break; + if (mpc->mpoad_vcc != NULL) { + stop_mpc(mpc); + } + break; + case NETDEV_REBOOT: + case NETDEV_CHANGE: + case NETDEV_CHANGEMTU: + case NETDEV_CHANGEADDR: + case NETDEV_GOING_DOWN: + break; + default: + break; + } + + return NOTIFY_DONE; +} + +/* + * Functions which are called after a message is received from mpcd. + * Msg is reused on purpose. + */ + + +static void MPOA_trigger_rcvd(struct k_message *msg, struct mpoa_client *mpc) +{ + __be32 dst_ip = msg->content.in_info.in_dst_ip; + in_cache_entry *entry; + + entry = mpc->in_ops->get(dst_ip, mpc); + if(entry == NULL){ + entry = mpc->in_ops->add_entry(dst_ip, mpc); + entry->entry_state = INGRESS_RESOLVING; + msg->type = SND_MPOA_RES_RQST; + msg->content.in_info = entry->ctrl_info; + msg_to_mpoad(msg, mpc); + do_gettimeofday(&(entry->reply_wait)); + mpc->in_ops->put(entry); + return; + } + + if(entry->entry_state == INGRESS_INVALID){ + entry->entry_state = INGRESS_RESOLVING; + msg->type = SND_MPOA_RES_RQST; + msg->content.in_info = entry->ctrl_info; + msg_to_mpoad(msg, mpc); + do_gettimeofday(&(entry->reply_wait)); + mpc->in_ops->put(entry); + return; + } + + printk("mpoa: (%s) MPOA_trigger_rcvd: entry already in resolving state\n", + (mpc->dev) ? mpc->dev->name : ""); + mpc->in_ops->put(entry); + return; +} + +/* + * Things get complicated because we have to check if there's an egress + * shortcut with suitable traffic parameters we could use. + */ +static void check_qos_and_open_shortcut(struct k_message *msg, struct mpoa_client *client, in_cache_entry *entry) +{ + __be32 dst_ip = msg->content.in_info.in_dst_ip; + struct atm_mpoa_qos *qos = atm_mpoa_search_qos(dst_ip); + eg_cache_entry *eg_entry = client->eg_ops->get_by_src_ip(dst_ip, client); + + if(eg_entry && eg_entry->shortcut){ + if(eg_entry->shortcut->qos.txtp.traffic_class & + msg->qos.txtp.traffic_class & + (qos ? qos->qos.txtp.traffic_class : ATM_UBR | ATM_CBR)){ + if(eg_entry->shortcut->qos.txtp.traffic_class == ATM_UBR) + entry->shortcut = eg_entry->shortcut; + else if(eg_entry->shortcut->qos.txtp.max_pcr > 0) + entry->shortcut = eg_entry->shortcut; + } + if(entry->shortcut){ + dprintk("mpoa: (%s) using egress SVC to reach %u.%u.%u.%u\n",client->dev->name, NIPQUAD(dst_ip)); + client->eg_ops->put(eg_entry); + return; + } + } + if (eg_entry != NULL) + client->eg_ops->put(eg_entry); + + /* No luck in the egress cache we must open an ingress SVC */ + msg->type = OPEN_INGRESS_SVC; + if (qos && (qos->qos.txtp.traffic_class == msg->qos.txtp.traffic_class)) + { + msg->qos = qos->qos; + printk("mpoa: (%s) trying to get a CBR shortcut\n",client->dev->name); + } + else memset(&msg->qos,0,sizeof(struct atm_qos)); + msg_to_mpoad(msg, client); + return; +} + +static void MPOA_res_reply_rcvd(struct k_message *msg, struct mpoa_client *mpc) +{ + __be32 dst_ip = msg->content.in_info.in_dst_ip; + in_cache_entry *entry = mpc->in_ops->get(dst_ip, mpc); + + dprintk("mpoa: (%s) MPOA_res_reply_rcvd: ip %u.%u.%u.%u\n", mpc->dev->name, NIPQUAD(dst_ip)); + ddprintk("mpoa: (%s) MPOA_res_reply_rcvd() entry = %p", mpc->dev->name, entry); + if(entry == NULL){ + printk("\nmpoa: (%s) ARGH, received res. reply for an entry that doesn't exist.\n", mpc->dev->name); + return; + } + ddprintk(" entry_state = %d ", entry->entry_state); + + if (entry->entry_state == INGRESS_RESOLVED) { + printk("\nmpoa: (%s) MPOA_res_reply_rcvd for RESOLVED entry!\n", mpc->dev->name); + mpc->in_ops->put(entry); + return; + } + + entry->ctrl_info = msg->content.in_info; + do_gettimeofday(&(entry->tv)); + do_gettimeofday(&(entry->reply_wait)); /* Used in refreshing func from now on */ + entry->refresh_time = 0; + ddprintk("entry->shortcut = %p\n", entry->shortcut); + + if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL){ + entry->entry_state = INGRESS_RESOLVED; + mpc->in_ops->put(entry); + return; /* Shortcut already open... */ + } + + if (entry->shortcut != NULL) { + printk("mpoa: (%s) MPOA_res_reply_rcvd: entry->shortcut != NULL, impossible!\n", + mpc->dev->name); + mpc->in_ops->put(entry); + return; + } + + check_qos_and_open_shortcut(msg, mpc, entry); + entry->entry_state = INGRESS_RESOLVED; + mpc->in_ops->put(entry); + + return; + +} + +static void ingress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) +{ + __be32 dst_ip = msg->content.in_info.in_dst_ip; + __be32 mask = msg->ip_mask; + in_cache_entry *entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); + + if(entry == NULL){ + printk("mpoa: (%s) ingress_purge_rcvd: purge for a non-existing entry, ", mpc->dev->name); + printk("ip = %u.%u.%u.%u\n", NIPQUAD(dst_ip)); + return; + } + + do { + dprintk("mpoa: (%s) ingress_purge_rcvd: removing an ingress entry, ip = %u.%u.%u.%u\n" , + mpc->dev->name, NIPQUAD(dst_ip)); + write_lock_bh(&mpc->ingress_lock); + mpc->in_ops->remove_entry(entry, mpc); + write_unlock_bh(&mpc->ingress_lock); + mpc->in_ops->put(entry); + entry = mpc->in_ops->get_with_mask(dst_ip, mpc, mask); + } while (entry != NULL); + + return; +} + +static void egress_purge_rcvd(struct k_message *msg, struct mpoa_client *mpc) +{ + __be32 cache_id = msg->content.eg_info.cache_id; + eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(cache_id, mpc); + + if (entry == NULL) { + dprintk("mpoa: (%s) egress_purge_rcvd: purge for a non-existing entry\n", mpc->dev->name); + return; + } + + write_lock_irq(&mpc->egress_lock); + mpc->eg_ops->remove_entry(entry, mpc); + write_unlock_irq(&mpc->egress_lock); + + mpc->eg_ops->put(entry); + + return; +} + +static void purge_egress_shortcut(struct atm_vcc *vcc, eg_cache_entry *entry) +{ + struct sock *sk; + struct k_message *purge_msg; + struct sk_buff *skb; + + dprintk("mpoa: purge_egress_shortcut: entering\n"); + if (vcc == NULL) { + printk("mpoa: purge_egress_shortcut: vcc == NULL\n"); + return; + } + + skb = alloc_skb(sizeof(struct k_message), GFP_ATOMIC); + if (skb == NULL) { + printk("mpoa: purge_egress_shortcut: out of memory\n"); + return; + } + + skb_put(skb, sizeof(struct k_message)); + memset(skb->data, 0, sizeof(struct k_message)); + purge_msg = (struct k_message *)skb->data; + purge_msg->type = DATA_PLANE_PURGE; + if (entry != NULL) + purge_msg->content.eg_info = entry->ctrl_info; + + atm_force_charge(vcc, skb->truesize); + + sk = sk_atm(vcc); + skb_queue_tail(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); + dprintk("mpoa: purge_egress_shortcut: exiting:\n"); + + return; +} + +/* + * Our MPS died. Tell our daemon to send NHRP data plane purge to each + * of the egress shortcuts we have. + */ +static void mps_death( struct k_message * msg, struct mpoa_client * mpc ) +{ + eg_cache_entry *entry; + + dprintk("mpoa: (%s) mps_death:\n", mpc->dev->name); + + if(memcmp(msg->MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN)){ + printk("mpoa: (%s) mps_death: wrong MPS\n", mpc->dev->name); + return; + } + + /* FIXME: This knows too much of the cache structure */ + read_lock_irq(&mpc->egress_lock); + entry = mpc->eg_cache; + while (entry != NULL) { + purge_egress_shortcut(entry->shortcut, entry); + entry = entry->next; + } + read_unlock_irq(&mpc->egress_lock); + + mpc->in_ops->destroy_cache(mpc); + mpc->eg_ops->destroy_cache(mpc); + + return; +} + +static void MPOA_cache_impos_rcvd( struct k_message * msg, struct mpoa_client * mpc) +{ + uint16_t holding_time; + eg_cache_entry *entry = mpc->eg_ops->get_by_cache_id(msg->content.eg_info.cache_id, mpc); + + holding_time = msg->content.eg_info.holding_time; + dprintk("mpoa: (%s) MPOA_cache_impos_rcvd: entry = %p, holding_time = %u\n", + mpc->dev->name, entry, holding_time); + if(entry == NULL && holding_time) { + entry = mpc->eg_ops->add_entry(msg, mpc); + mpc->eg_ops->put(entry); + return; + } + if(holding_time){ + mpc->eg_ops->update(entry, holding_time); + return; + } + + write_lock_irq(&mpc->egress_lock); + mpc->eg_ops->remove_entry(entry, mpc); + write_unlock_irq(&mpc->egress_lock); + + mpc->eg_ops->put(entry); + + return; +} + +static void set_mpc_ctrl_addr_rcvd(struct k_message *mesg, struct mpoa_client *mpc) +{ + struct lec_priv *priv; + int i, retval ; + + uint8_t tlv[4 + 1 + 1 + 1 + ATM_ESA_LEN]; + + tlv[0] = 00; tlv[1] = 0xa0; tlv[2] = 0x3e; tlv[3] = 0x2a; /* type */ + tlv[4] = 1 + 1 + ATM_ESA_LEN; /* length */ + tlv[5] = 0x02; /* MPOA client */ + tlv[6] = 0x00; /* number of MPS MAC addresses */ + + memcpy(&tlv[7], mesg->MPS_ctrl, ATM_ESA_LEN); /* MPC ctrl ATM addr */ + memcpy(mpc->our_ctrl_addr, mesg->MPS_ctrl, ATM_ESA_LEN); + + dprintk("mpoa: (%s) setting MPC ctrl ATM address to ", + (mpc->dev) ? mpc->dev->name : ""); + for (i = 7; i < sizeof(tlv); i++) + dprintk("%02x ", tlv[i]); + dprintk("\n"); + + if (mpc->dev) { + priv = (struct lec_priv *)mpc->dev->priv; + retval = priv->lane2_ops->associate_req(mpc->dev, mpc->dev->dev_addr, tlv, sizeof(tlv)); + if (retval == 0) + printk("mpoa: (%s) MPOA device type TLV association failed\n", mpc->dev->name); + retval = priv->lane2_ops->resolve(mpc->dev, NULL, 1, NULL, NULL); + if (retval < 0) + printk("mpoa: (%s) targetless LE_ARP request failed\n", mpc->dev->name); + } + + return; +} + +static void set_mps_mac_addr_rcvd(struct k_message *msg, struct mpoa_client *client) +{ + + if(client->number_of_mps_macs) + kfree(client->mps_macs); + client->number_of_mps_macs = 0; + client->mps_macs = kmemdup(msg->MPS_ctrl, ETH_ALEN, GFP_KERNEL); + if (client->mps_macs == NULL) { + printk("mpoa: set_mps_mac_addr_rcvd: out of memory\n"); + return; + } + client->number_of_mps_macs = 1; + + return; +} + +/* + * purge egress cache and tell daemon to 'action' (DIE, RELOAD) + */ +static void clean_up(struct k_message *msg, struct mpoa_client *mpc, int action) +{ + + eg_cache_entry *entry; + msg->type = SND_EGRESS_PURGE; + + + /* FIXME: This knows too much of the cache structure */ + read_lock_irq(&mpc->egress_lock); + entry = mpc->eg_cache; + while (entry != NULL){ + msg->content.eg_info = entry->ctrl_info; + dprintk("mpoa: cache_id %u\n", entry->ctrl_info.cache_id); + msg_to_mpoad(msg, mpc); + entry = entry->next; + } + read_unlock_irq(&mpc->egress_lock); + + msg->type = action; + msg_to_mpoad(msg, mpc); + return; +} + +static void mpc_timer_refresh(void) +{ + mpc_timer.expires = jiffies + (MPC_P2 * HZ); + mpc_timer.data = mpc_timer.expires; + mpc_timer.function = mpc_cache_check; + add_timer(&mpc_timer); + + return; +} + +static void mpc_cache_check( unsigned long checking_time ) +{ + struct mpoa_client *mpc = mpcs; + static unsigned long previous_resolving_check_time; + static unsigned long previous_refresh_time; + + while( mpc != NULL ){ + mpc->in_ops->clear_count(mpc); + mpc->eg_ops->clear_expired(mpc); + if(checking_time - previous_resolving_check_time > mpc->parameters.mpc_p4 * HZ ){ + mpc->in_ops->check_resolving(mpc); + previous_resolving_check_time = checking_time; + } + if(checking_time - previous_refresh_time > mpc->parameters.mpc_p5 * HZ ){ + mpc->in_ops->refresh(mpc); + previous_refresh_time = checking_time; + } + mpc = mpc->next; + } + mpc_timer_refresh(); + + return; +} + +static int atm_mpoa_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) +{ + int err = 0; + struct atm_vcc *vcc = ATM_SD(sock); + + if (cmd != ATMMPC_CTRL && cmd != ATMMPC_DATA) + return -ENOIOCTLCMD; + + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + + switch (cmd) { + case ATMMPC_CTRL: + err = atm_mpoa_mpoad_attach(vcc, (int)arg); + if (err >= 0) + sock->state = SS_CONNECTED; + break; + case ATMMPC_DATA: + err = atm_mpoa_vcc_attach(vcc, (void __user *)arg); + break; + default: + break; + } + return err; +} + + +static struct atm_ioctl atm_ioctl_ops = { + .owner = THIS_MODULE, + .ioctl = atm_mpoa_ioctl, +}; + +static __init int atm_mpoa_init(void) +{ + register_atm_ioctl(&atm_ioctl_ops); + + if (mpc_proc_init() != 0) + printk(KERN_INFO "mpoa: failed to initialize /proc/mpoa\n"); + + printk("mpc.c: " __DATE__ " " __TIME__ " initialized\n"); + + return 0; +} + +static void __exit atm_mpoa_cleanup(void) +{ + struct mpoa_client *mpc, *tmp; + struct atm_mpoa_qos *qos, *nextqos; + struct lec_priv *priv; + + mpc_proc_clean(); + + del_timer(&mpc_timer); + unregister_netdevice_notifier(&mpoa_notifier); + deregister_atm_ioctl(&atm_ioctl_ops); + + mpc = mpcs; + mpcs = NULL; + while (mpc != NULL) { + tmp = mpc->next; + if (mpc->dev != NULL) { + stop_mpc(mpc); + priv = (struct lec_priv *)mpc->dev->priv; + if (priv->lane2_ops != NULL) + priv->lane2_ops->associate_indicator = NULL; + } + ddprintk("mpoa: cleanup_module: about to clear caches\n"); + mpc->in_ops->destroy_cache(mpc); + mpc->eg_ops->destroy_cache(mpc); + ddprintk("mpoa: cleanup_module: caches cleared\n"); + kfree(mpc->mps_macs); + memset(mpc, 0, sizeof(struct mpoa_client)); + ddprintk("mpoa: cleanup_module: about to kfree %p\n", mpc); + kfree(mpc); + ddprintk("mpoa: cleanup_module: next mpc is at %p\n", tmp); + mpc = tmp; + } + + qos = qos_head; + qos_head = NULL; + while (qos != NULL) { + nextqos = qos->next; + dprintk("mpoa: cleanup_module: freeing qos entry %p\n", qos); + kfree(qos); + qos = nextqos; + } + + return; +} + +module_init(atm_mpoa_init); +module_exit(atm_mpoa_cleanup); + +MODULE_LICENSE("GPL"); diff --git a/net/atm/mpc.h b/net/atm/mpc.h new file mode 100644 index 0000000..24c386c --- /dev/null +++ b/net/atm/mpc.h @@ -0,0 +1,61 @@ +#ifndef _MPC_H_ +#define _MPC_H_ + +#include +#include +#include +#include +#include +#include "mpoa_caches.h" + +/* kernel -> mpc-daemon */ +int msg_to_mpoad(struct k_message *msg, struct mpoa_client *mpc); + +struct mpoa_client { + struct mpoa_client *next; + struct net_device *dev; /* lec in question */ + int dev_num; /* e.g. 2 for lec2 */ + int (*old_hard_start_xmit)(struct sk_buff *skb, struct net_device *dev); + struct atm_vcc *mpoad_vcc; /* control channel to mpoad */ + uint8_t mps_ctrl_addr[ATM_ESA_LEN]; /* MPS control ATM address */ + uint8_t our_ctrl_addr[ATM_ESA_LEN]; /* MPC's control ATM address */ + + rwlock_t ingress_lock; + struct in_cache_ops *in_ops; /* ingress cache operations */ + in_cache_entry *in_cache; /* the ingress cache of this MPC */ + + rwlock_t egress_lock; + struct eg_cache_ops *eg_ops; /* egress cache operations */ + eg_cache_entry *eg_cache; /* the egress cache of this MPC */ + + uint8_t *mps_macs; /* array of MPS MAC addresses, >=1 */ + int number_of_mps_macs; /* number of the above MAC addresses */ + struct mpc_parameters parameters; /* parameters for this client */ +}; + + +struct atm_mpoa_qos { + struct atm_mpoa_qos *next; + __be32 ipaddr; + struct atm_qos qos; +}; + + +/* MPOA QoS operations */ +struct atm_mpoa_qos *atm_mpoa_add_qos(__be32 dst_ip, struct atm_qos *qos); +struct atm_mpoa_qos *atm_mpoa_search_qos(__be32 dst_ip); +int atm_mpoa_delete_qos(struct atm_mpoa_qos *qos); + +/* Display QoS entries. This is for the procfs */ +struct seq_file; +void atm_mpoa_disp_qos(struct seq_file *m); + +#ifdef CONFIG_PROC_FS +int mpc_proc_init(void); +void mpc_proc_clean(void); +#else +#define mpc_proc_init() (0) +#define mpc_proc_clean() do { } while(0) +#endif + +#endif /* _MPC_H_ */ diff --git a/net/atm/mpoa_caches.c b/net/atm/mpoa_caches.c new file mode 100644 index 0000000..24799e3 --- /dev/null +++ b/net/atm/mpoa_caches.c @@ -0,0 +1,564 @@ +#include +#include +#include + +#include "mpoa_caches.h" +#include "mpc.h" + +/* + * mpoa_caches.c: Implementation of ingress and egress cache + * handling functions + */ + +#if 0 +#define dprintk printk /* debug */ +#else +#define dprintk(format,args...) +#endif + +#if 0 +#define ddprintk printk /* more debug */ +#else +#define ddprintk(format,args...) +#endif + +static in_cache_entry *in_cache_get(__be32 dst_ip, + struct mpoa_client *client) +{ + in_cache_entry *entry; + + read_lock_bh(&client->ingress_lock); + entry = client->in_cache; + while(entry != NULL){ + if( entry->ctrl_info.in_dst_ip == dst_ip ){ + atomic_inc(&entry->use); + read_unlock_bh(&client->ingress_lock); + return entry; + } + entry = entry->next; + } + read_unlock_bh(&client->ingress_lock); + + return NULL; +} + +static in_cache_entry *in_cache_get_with_mask(__be32 dst_ip, + struct mpoa_client *client, + __be32 mask) +{ + in_cache_entry *entry; + + read_lock_bh(&client->ingress_lock); + entry = client->in_cache; + while(entry != NULL){ + if((entry->ctrl_info.in_dst_ip & mask) == (dst_ip & mask )){ + atomic_inc(&entry->use); + read_unlock_bh(&client->ingress_lock); + return entry; + } + entry = entry->next; + } + read_unlock_bh(&client->ingress_lock); + + return NULL; + +} + +static in_cache_entry *in_cache_get_by_vcc(struct atm_vcc *vcc, + struct mpoa_client *client ) +{ + in_cache_entry *entry; + + read_lock_bh(&client->ingress_lock); + entry = client->in_cache; + while(entry != NULL){ + if(entry->shortcut == vcc) { + atomic_inc(&entry->use); + read_unlock_bh(&client->ingress_lock); + return entry; + } + entry = entry->next; + } + read_unlock_bh(&client->ingress_lock); + + return NULL; +} + +static in_cache_entry *in_cache_add_entry(__be32 dst_ip, + struct mpoa_client *client) +{ + in_cache_entry *entry = kzalloc(sizeof(in_cache_entry), GFP_KERNEL); + + if (entry == NULL) { + printk("mpoa: mpoa_caches.c: new_in_cache_entry: out of memory\n"); + return NULL; + } + + dprintk("mpoa: mpoa_caches.c: adding an ingress entry, ip = %u.%u.%u.%u\n", NIPQUAD(dst_ip)); + + atomic_set(&entry->use, 1); + dprintk("mpoa: mpoa_caches.c: new_in_cache_entry: about to lock\n"); + write_lock_bh(&client->ingress_lock); + entry->next = client->in_cache; + entry->prev = NULL; + if (client->in_cache != NULL) + client->in_cache->prev = entry; + client->in_cache = entry; + + memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN); + entry->ctrl_info.in_dst_ip = dst_ip; + do_gettimeofday(&(entry->tv)); + entry->retry_time = client->parameters.mpc_p4; + entry->count = 1; + entry->entry_state = INGRESS_INVALID; + entry->ctrl_info.holding_time = HOLDING_TIME_DEFAULT; + atomic_inc(&entry->use); + + write_unlock_bh(&client->ingress_lock); + dprintk("mpoa: mpoa_caches.c: new_in_cache_entry: unlocked\n"); + + return entry; +} + +static int cache_hit(in_cache_entry *entry, struct mpoa_client *mpc) +{ + struct atm_mpoa_qos *qos; + struct k_message msg; + + entry->count++; + if(entry->entry_state == INGRESS_RESOLVED && entry->shortcut != NULL) + return OPEN; + + if(entry->entry_state == INGRESS_REFRESHING){ + if(entry->count > mpc->parameters.mpc_p1){ + msg.type = SND_MPOA_RES_RQST; + msg.content.in_info = entry->ctrl_info; + memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN); + qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); + if (qos != NULL) msg.qos = qos->qos; + msg_to_mpoad(&msg, mpc); + do_gettimeofday(&(entry->reply_wait)); + entry->entry_state = INGRESS_RESOLVING; + } + if(entry->shortcut != NULL) + return OPEN; + return CLOSED; + } + + if(entry->entry_state == INGRESS_RESOLVING && entry->shortcut != NULL) + return OPEN; + + if( entry->count > mpc->parameters.mpc_p1 && + entry->entry_state == INGRESS_INVALID){ + dprintk("mpoa: (%s) mpoa_caches.c: threshold exceeded for ip %u.%u.%u.%u, sending MPOA res req\n", mpc->dev->name, NIPQUAD(entry->ctrl_info.in_dst_ip)); + entry->entry_state = INGRESS_RESOLVING; + msg.type = SND_MPOA_RES_RQST; + memcpy(msg.MPS_ctrl, mpc->mps_ctrl_addr, ATM_ESA_LEN ); + msg.content.in_info = entry->ctrl_info; + qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); + if (qos != NULL) msg.qos = qos->qos; + msg_to_mpoad( &msg, mpc); + do_gettimeofday(&(entry->reply_wait)); + } + + return CLOSED; +} + +static void in_cache_put(in_cache_entry *entry) +{ + if (atomic_dec_and_test(&entry->use)) { + memset(entry, 0, sizeof(in_cache_entry)); + kfree(entry); + } + + return; +} + +/* + * This should be called with write lock on + */ +static void in_cache_remove_entry(in_cache_entry *entry, + struct mpoa_client *client) +{ + struct atm_vcc *vcc; + struct k_message msg; + + vcc = entry->shortcut; + dprintk("mpoa: mpoa_caches.c: removing an ingress entry, ip = %u.%u.%u.%u\n",NIPQUAD(entry->ctrl_info.in_dst_ip)); + + if (entry->prev != NULL) + entry->prev->next = entry->next; + else + client->in_cache = entry->next; + if (entry->next != NULL) + entry->next->prev = entry->prev; + client->in_ops->put(entry); + if(client->in_cache == NULL && client->eg_cache == NULL){ + msg.type = STOP_KEEP_ALIVE_SM; + msg_to_mpoad(&msg,client); + } + + /* Check if the egress side still uses this VCC */ + if (vcc != NULL) { + eg_cache_entry *eg_entry = client->eg_ops->get_by_vcc(vcc, client); + if (eg_entry != NULL) { + client->eg_ops->put(eg_entry); + return; + } + vcc_release_async(vcc, -EPIPE); + } + + return; +} + + +/* Call this every MPC-p2 seconds... Not exactly correct solution, + but an easy one... */ +static void clear_count_and_expired(struct mpoa_client *client) +{ + in_cache_entry *entry, *next_entry; + struct timeval now; + + do_gettimeofday(&now); + + write_lock_bh(&client->ingress_lock); + entry = client->in_cache; + while(entry != NULL){ + entry->count=0; + next_entry = entry->next; + if((now.tv_sec - entry->tv.tv_sec) + > entry->ctrl_info.holding_time){ + dprintk("mpoa: mpoa_caches.c: holding time expired, ip = %u.%u.%u.%u\n", NIPQUAD(entry->ctrl_info.in_dst_ip)); + client->in_ops->remove_entry(entry, client); + } + entry = next_entry; + } + write_unlock_bh(&client->ingress_lock); + + return; +} + +/* Call this every MPC-p4 seconds. */ +static void check_resolving_entries(struct mpoa_client *client) +{ + + struct atm_mpoa_qos *qos; + in_cache_entry *entry; + struct timeval now; + struct k_message msg; + + do_gettimeofday( &now ); + + read_lock_bh(&client->ingress_lock); + entry = client->in_cache; + while( entry != NULL ){ + if(entry->entry_state == INGRESS_RESOLVING){ + if(now.tv_sec - entry->hold_down.tv_sec < client->parameters.mpc_p6){ + entry = entry->next; /* Entry in hold down */ + continue; + } + if( (now.tv_sec - entry->reply_wait.tv_sec) > + entry->retry_time ){ + entry->retry_time = MPC_C1*( entry->retry_time ); + if(entry->retry_time > client->parameters.mpc_p5){ + /* Retry time maximum exceeded, put entry in hold down. */ + do_gettimeofday(&(entry->hold_down)); + entry->retry_time = client->parameters.mpc_p4; + entry = entry->next; + continue; + } + /* Ask daemon to send a resolution request. */ + memset(&(entry->hold_down),0,sizeof(struct timeval)); + msg.type = SND_MPOA_RES_RTRY; + memcpy(msg.MPS_ctrl, client->mps_ctrl_addr, ATM_ESA_LEN); + msg.content.in_info = entry->ctrl_info; + qos = atm_mpoa_search_qos(entry->ctrl_info.in_dst_ip); + if (qos != NULL) msg.qos = qos->qos; + msg_to_mpoad(&msg, client); + do_gettimeofday(&(entry->reply_wait)); + } + } + entry = entry->next; + } + read_unlock_bh(&client->ingress_lock); +} + +/* Call this every MPC-p5 seconds. */ +static void refresh_entries(struct mpoa_client *client) +{ + struct timeval now; + struct in_cache_entry *entry = client->in_cache; + + ddprintk("mpoa: mpoa_caches.c: refresh_entries\n"); + do_gettimeofday(&now); + + read_lock_bh(&client->ingress_lock); + while( entry != NULL ){ + if( entry->entry_state == INGRESS_RESOLVED ){ + if(!(entry->refresh_time)) + entry->refresh_time = (2*(entry->ctrl_info.holding_time))/3; + if( (now.tv_sec - entry->reply_wait.tv_sec) > entry->refresh_time ){ + dprintk("mpoa: mpoa_caches.c: refreshing an entry.\n"); + entry->entry_state = INGRESS_REFRESHING; + + } + } + entry = entry->next; + } + read_unlock_bh(&client->ingress_lock); +} + +static void in_destroy_cache(struct mpoa_client *mpc) +{ + write_lock_irq(&mpc->ingress_lock); + while(mpc->in_cache != NULL) + mpc->in_ops->remove_entry(mpc->in_cache, mpc); + write_unlock_irq(&mpc->ingress_lock); + + return; +} + +static eg_cache_entry *eg_cache_get_by_cache_id(__be32 cache_id, struct mpoa_client *mpc) +{ + eg_cache_entry *entry; + + read_lock_irq(&mpc->egress_lock); + entry = mpc->eg_cache; + while(entry != NULL){ + if(entry->ctrl_info.cache_id == cache_id){ + atomic_inc(&entry->use); + read_unlock_irq(&mpc->egress_lock); + return entry; + } + entry = entry->next; + } + read_unlock_irq(&mpc->egress_lock); + + return NULL; +} + +/* This can be called from any context since it saves CPU flags */ +static eg_cache_entry *eg_cache_get_by_tag(__be32 tag, struct mpoa_client *mpc) +{ + unsigned long flags; + eg_cache_entry *entry; + + read_lock_irqsave(&mpc->egress_lock, flags); + entry = mpc->eg_cache; + while (entry != NULL){ + if (entry->ctrl_info.tag == tag) { + atomic_inc(&entry->use); + read_unlock_irqrestore(&mpc->egress_lock, flags); + return entry; + } + entry = entry->next; + } + read_unlock_irqrestore(&mpc->egress_lock, flags); + + return NULL; +} + +/* This can be called from any context since it saves CPU flags */ +static eg_cache_entry *eg_cache_get_by_vcc(struct atm_vcc *vcc, struct mpoa_client *mpc) +{ + unsigned long flags; + eg_cache_entry *entry; + + read_lock_irqsave(&mpc->egress_lock, flags); + entry = mpc->eg_cache; + while (entry != NULL){ + if (entry->shortcut == vcc) { + atomic_inc(&entry->use); + read_unlock_irqrestore(&mpc->egress_lock, flags); + return entry; + } + entry = entry->next; + } + read_unlock_irqrestore(&mpc->egress_lock, flags); + + return NULL; +} + +static eg_cache_entry *eg_cache_get_by_src_ip(__be32 ipaddr, struct mpoa_client *mpc) +{ + eg_cache_entry *entry; + + read_lock_irq(&mpc->egress_lock); + entry = mpc->eg_cache; + while(entry != NULL){ + if(entry->latest_ip_addr == ipaddr) { + atomic_inc(&entry->use); + read_unlock_irq(&mpc->egress_lock); + return entry; + } + entry = entry->next; + } + read_unlock_irq(&mpc->egress_lock); + + return NULL; +} + +static void eg_cache_put(eg_cache_entry *entry) +{ + if (atomic_dec_and_test(&entry->use)) { + memset(entry, 0, sizeof(eg_cache_entry)); + kfree(entry); + } + + return; +} + +/* + * This should be called with write lock on + */ +static void eg_cache_remove_entry(eg_cache_entry *entry, + struct mpoa_client *client) +{ + struct atm_vcc *vcc; + struct k_message msg; + + vcc = entry->shortcut; + dprintk("mpoa: mpoa_caches.c: removing an egress entry.\n"); + if (entry->prev != NULL) + entry->prev->next = entry->next; + else + client->eg_cache = entry->next; + if (entry->next != NULL) + entry->next->prev = entry->prev; + client->eg_ops->put(entry); + if(client->in_cache == NULL && client->eg_cache == NULL){ + msg.type = STOP_KEEP_ALIVE_SM; + msg_to_mpoad(&msg,client); + } + + /* Check if the ingress side still uses this VCC */ + if (vcc != NULL) { + in_cache_entry *in_entry = client->in_ops->get_by_vcc(vcc, client); + if (in_entry != NULL) { + client->in_ops->put(in_entry); + return; + } + vcc_release_async(vcc, -EPIPE); + } + + return; +} + +static eg_cache_entry *eg_cache_add_entry(struct k_message *msg, struct mpoa_client *client) +{ + eg_cache_entry *entry = kzalloc(sizeof(eg_cache_entry), GFP_KERNEL); + + if (entry == NULL) { + printk("mpoa: mpoa_caches.c: new_eg_cache_entry: out of memory\n"); + return NULL; + } + + dprintk("mpoa: mpoa_caches.c: adding an egress entry, ip = %u.%u.%u.%u, this should be our IP\n", NIPQUAD(msg->content.eg_info.eg_dst_ip)); + + atomic_set(&entry->use, 1); + dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry: about to lock\n"); + write_lock_irq(&client->egress_lock); + entry->next = client->eg_cache; + entry->prev = NULL; + if (client->eg_cache != NULL) + client->eg_cache->prev = entry; + client->eg_cache = entry; + + memcpy(entry->MPS_ctrl_ATM_addr, client->mps_ctrl_addr, ATM_ESA_LEN); + entry->ctrl_info = msg->content.eg_info; + do_gettimeofday(&(entry->tv)); + entry->entry_state = EGRESS_RESOLVED; + dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry cache_id %lu\n", ntohl(entry->ctrl_info.cache_id)); + dprintk("mpoa: mpoa_caches.c: mps_ip = %u.%u.%u.%u\n", + NIPQUAD(entry->ctrl_info.mps_ip)); + atomic_inc(&entry->use); + + write_unlock_irq(&client->egress_lock); + dprintk("mpoa: mpoa_caches.c: new_eg_cache_entry: unlocked\n"); + + return entry; +} + +static void update_eg_cache_entry(eg_cache_entry * entry, uint16_t holding_time) +{ + do_gettimeofday(&(entry->tv)); + entry->entry_state = EGRESS_RESOLVED; + entry->ctrl_info.holding_time = holding_time; + + return; +} + +static void clear_expired(struct mpoa_client *client) +{ + eg_cache_entry *entry, *next_entry; + struct timeval now; + struct k_message msg; + + do_gettimeofday(&now); + + write_lock_irq(&client->egress_lock); + entry = client->eg_cache; + while(entry != NULL){ + next_entry = entry->next; + if((now.tv_sec - entry->tv.tv_sec) + > entry->ctrl_info.holding_time){ + msg.type = SND_EGRESS_PURGE; + msg.content.eg_info = entry->ctrl_info; + dprintk("mpoa: mpoa_caches.c: egress_cache: holding time expired, cache_id = %lu.\n",ntohl(entry->ctrl_info.cache_id)); + msg_to_mpoad(&msg, client); + client->eg_ops->remove_entry(entry, client); + } + entry = next_entry; + } + write_unlock_irq(&client->egress_lock); + + return; +} + +static void eg_destroy_cache(struct mpoa_client *mpc) +{ + write_lock_irq(&mpc->egress_lock); + while(mpc->eg_cache != NULL) + mpc->eg_ops->remove_entry(mpc->eg_cache, mpc); + write_unlock_irq(&mpc->egress_lock); + + return; +} + + + +static struct in_cache_ops ingress_ops = { + in_cache_add_entry, /* add_entry */ + in_cache_get, /* get */ + in_cache_get_with_mask, /* get_with_mask */ + in_cache_get_by_vcc, /* get_by_vcc */ + in_cache_put, /* put */ + in_cache_remove_entry, /* remove_entry */ + cache_hit, /* cache_hit */ + clear_count_and_expired, /* clear_count */ + check_resolving_entries, /* check_resolving */ + refresh_entries, /* refresh */ + in_destroy_cache /* destroy_cache */ +}; + +static struct eg_cache_ops egress_ops = { + eg_cache_add_entry, /* add_entry */ + eg_cache_get_by_cache_id, /* get_by_cache_id */ + eg_cache_get_by_tag, /* get_by_tag */ + eg_cache_get_by_vcc, /* get_by_vcc */ + eg_cache_get_by_src_ip, /* get_by_src_ip */ + eg_cache_put, /* put */ + eg_cache_remove_entry, /* remove_entry */ + update_eg_cache_entry, /* update */ + clear_expired, /* clear_expired */ + eg_destroy_cache /* destroy_cache */ +}; + + +void atm_mpoa_init_cache(struct mpoa_client *mpc) +{ + mpc->in_ops = &ingress_ops; + mpc->eg_ops = &egress_ops; + + return; +} diff --git a/net/atm/mpoa_caches.h b/net/atm/mpoa_caches.h new file mode 100644 index 0000000..8e5f78c --- /dev/null +++ b/net/atm/mpoa_caches.h @@ -0,0 +1,96 @@ +#ifndef MPOA_CACHES_H +#define MPOA_CACHES_H + +#include +#include +#include +#include +#include + +struct mpoa_client; + +void atm_mpoa_init_cache(struct mpoa_client *mpc); + +typedef struct in_cache_entry { + struct in_cache_entry *next; + struct in_cache_entry *prev; + struct timeval tv; + struct timeval reply_wait; + struct timeval hold_down; + uint32_t packets_fwded; + uint16_t entry_state; + uint32_t retry_time; + uint32_t refresh_time; + uint32_t count; + struct atm_vcc *shortcut; + uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN]; + struct in_ctrl_info ctrl_info; + atomic_t use; +} in_cache_entry; + +struct in_cache_ops{ + in_cache_entry *(*add_entry)(__be32 dst_ip, + struct mpoa_client *client); + in_cache_entry *(*get)(__be32 dst_ip, struct mpoa_client *client); + in_cache_entry *(*get_with_mask)(__be32 dst_ip, + struct mpoa_client *client, + __be32 mask); + in_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, + struct mpoa_client *client); + void (*put)(in_cache_entry *entry); + void (*remove_entry)(in_cache_entry *delEntry, + struct mpoa_client *client ); + int (*cache_hit)(in_cache_entry *entry, + struct mpoa_client *client); + void (*clear_count)(struct mpoa_client *client); + void (*check_resolving)(struct mpoa_client *client); + void (*refresh)(struct mpoa_client *client); + void (*destroy_cache)(struct mpoa_client *mpc); +}; + +typedef struct eg_cache_entry{ + struct eg_cache_entry *next; + struct eg_cache_entry *prev; + struct timeval tv; + uint8_t MPS_ctrl_ATM_addr[ATM_ESA_LEN]; + struct atm_vcc *shortcut; + uint32_t packets_rcvd; + uint16_t entry_state; + __be32 latest_ip_addr; /* The src IP address of the last packet */ + struct eg_ctrl_info ctrl_info; + atomic_t use; +} eg_cache_entry; + +struct eg_cache_ops{ + eg_cache_entry *(*add_entry)(struct k_message *msg, struct mpoa_client *client); + eg_cache_entry *(*get_by_cache_id)(__be32 cache_id, struct mpoa_client *client); + eg_cache_entry *(*get_by_tag)(__be32 cache_id, struct mpoa_client *client); + eg_cache_entry *(*get_by_vcc)(struct atm_vcc *vcc, struct mpoa_client *client); + eg_cache_entry *(*get_by_src_ip)(__be32 ipaddr, struct mpoa_client *client); + void (*put)(eg_cache_entry *entry); + void (*remove_entry)(eg_cache_entry *entry, struct mpoa_client *client); + void (*update)(eg_cache_entry *entry, uint16_t holding_time); + void (*clear_expired)(struct mpoa_client *client); + void (*destroy_cache)(struct mpoa_client *mpc); +}; + + +/* Ingress cache entry states */ + +#define INGRESS_REFRESHING 3 +#define INGRESS_RESOLVED 2 +#define INGRESS_RESOLVING 1 +#define INGRESS_INVALID 0 + +/* VCC states */ + +#define OPEN 1 +#define CLOSED 0 + +/* Egress cache entry states */ + +#define EGRESS_RESOLVED 2 +#define EGRESS_PURGE 1 +#define EGRESS_INVALID 0 + +#endif diff --git a/net/atm/mpoa_proc.c b/net/atm/mpoa_proc.c new file mode 100644 index 0000000..4990541 --- /dev/null +++ b/net/atm/mpoa_proc.c @@ -0,0 +1,303 @@ + +#ifdef CONFIG_PROC_FS +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "mpc.h" +#include "mpoa_caches.h" + +/* + * mpoa_proc.c: Implementation MPOA client's proc + * file system statistics + */ + +#if 1 +#define dprintk printk /* debug */ +#else +#define dprintk(format,args...) +#endif + +#define STAT_FILE_NAME "mpc" /* Our statistic file's name */ + +extern struct mpoa_client *mpcs; +extern struct proc_dir_entry *atm_proc_root; /* from proc.c. */ + +static int proc_mpc_open(struct inode *inode, struct file *file); +static ssize_t proc_mpc_write(struct file *file, const char __user *buff, + size_t nbytes, loff_t *ppos); + +static int parse_qos(const char *buff); + +/* + * Define allowed FILE OPERATIONS + */ +static const struct file_operations mpc_file_operations = { + .owner = THIS_MODULE, + .open = proc_mpc_open, + .read = seq_read, + .llseek = seq_lseek, + .write = proc_mpc_write, + .release = seq_release, +}; + +/* + * Returns the state of an ingress cache entry as a string + */ +static const char *ingress_state_string(int state){ + switch(state) { + case INGRESS_RESOLVING: + return "resolving "; + break; + case INGRESS_RESOLVED: + return "resolved "; + break; + case INGRESS_INVALID: + return "invalid "; + break; + case INGRESS_REFRESHING: + return "refreshing "; + break; + default: + return ""; + } +} + +/* + * Returns the state of an egress cache entry as a string + */ +static const char *egress_state_string(int state){ + switch(state) { + case EGRESS_RESOLVED: + return "resolved "; + break; + case EGRESS_PURGE: + return "purge "; + break; + case EGRESS_INVALID: + return "invalid "; + break; + default: + return ""; + } +} + +/* + * FIXME: mpcs (and per-mpc lists) have no locking whatsoever. + */ + +static void *mpc_start(struct seq_file *m, loff_t *pos) +{ + loff_t l = *pos; + struct mpoa_client *mpc; + + if (!l--) + return SEQ_START_TOKEN; + for (mpc = mpcs; mpc; mpc = mpc->next) + if (!l--) + return mpc; + return NULL; +} + +static void *mpc_next(struct seq_file *m, void *v, loff_t *pos) +{ + struct mpoa_client *p = v; + (*pos)++; + return v == SEQ_START_TOKEN ? mpcs : p->next; +} + +static void mpc_stop(struct seq_file *m, void *v) +{ +} + +/* + * READING function - called when the /proc/atm/mpoa file is read from. + */ +static int mpc_show(struct seq_file *m, void *v) +{ + struct mpoa_client *mpc = v; + unsigned char *temp; + int i; + in_cache_entry *in_entry; + eg_cache_entry *eg_entry; + struct timeval now; + unsigned char ip_string[16]; + + if (v == SEQ_START_TOKEN) { + atm_mpoa_disp_qos(m); + return 0; + } + + seq_printf(m, "\nInterface %d:\n\n", mpc->dev_num); + seq_printf(m, "Ingress Entries:\nIP address State Holding time Packets fwded VPI VCI\n"); + do_gettimeofday(&now); + + for (in_entry = mpc->in_cache; in_entry; in_entry = in_entry->next) { + temp = (unsigned char *)&in_entry->ctrl_info.in_dst_ip; + sprintf(ip_string,"%d.%d.%d.%d", temp[0], temp[1], temp[2], temp[3]); + seq_printf(m, "%-16s%s%-14lu%-12u", + ip_string, + ingress_state_string(in_entry->entry_state), + in_entry->ctrl_info.holding_time-(now.tv_sec-in_entry->tv.tv_sec), + in_entry->packets_fwded); + if (in_entry->shortcut) + seq_printf(m, " %-3d %-3d",in_entry->shortcut->vpi,in_entry->shortcut->vci); + seq_printf(m, "\n"); + } + + seq_printf(m, "\n"); + seq_printf(m, "Egress Entries:\nIngress MPC ATM addr\nCache-id State Holding time Packets recvd Latest IP addr VPI VCI\n"); + for (eg_entry = mpc->eg_cache; eg_entry; eg_entry = eg_entry->next) { + unsigned char *p = eg_entry->ctrl_info.in_MPC_data_ATM_addr; + for(i = 0; i < ATM_ESA_LEN; i++) + seq_printf(m, "%02x", p[i]); + seq_printf(m, "\n%-16lu%s%-14lu%-15u", + (unsigned long)ntohl(eg_entry->ctrl_info.cache_id), + egress_state_string(eg_entry->entry_state), + (eg_entry->ctrl_info.holding_time-(now.tv_sec-eg_entry->tv.tv_sec)), + eg_entry->packets_rcvd); + + /* latest IP address */ + temp = (unsigned char *)&eg_entry->latest_ip_addr; + sprintf(ip_string, "%d.%d.%d.%d", temp[0], temp[1], temp[2], temp[3]); + seq_printf(m, "%-16s", ip_string); + + if (eg_entry->shortcut) + seq_printf(m, " %-3d %-3d",eg_entry->shortcut->vpi,eg_entry->shortcut->vci); + seq_printf(m, "\n"); + } + seq_printf(m, "\n"); + return 0; +} + +static const struct seq_operations mpc_op = { + .start = mpc_start, + .next = mpc_next, + .stop = mpc_stop, + .show = mpc_show +}; + +static int proc_mpc_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &mpc_op); +} + +static ssize_t proc_mpc_write(struct file *file, const char __user *buff, + size_t nbytes, loff_t *ppos) +{ + char *page, *p; + unsigned len; + + if (nbytes == 0) + return 0; + + if (nbytes >= PAGE_SIZE) + nbytes = PAGE_SIZE-1; + + page = (char *)__get_free_page(GFP_KERNEL); + if (!page) + return -ENOMEM; + + for (p = page, len = 0; len < nbytes; p++, len++) { + if (get_user(*p, buff++)) { + free_page((unsigned long)page); + return -EFAULT; + } + if (*p == '\0' || *p == '\n') + break; + } + + *p = '\0'; + + if (!parse_qos(page)) + printk("mpoa: proc_mpc_write: could not parse '%s'\n", page); + + free_page((unsigned long)page); + + return len; +} + +static int parse_qos(const char *buff) +{ + /* possible lines look like this + * add 130.230.54.142 tx=max_pcr,max_sdu rx=max_pcr,max_sdu + */ + unsigned char ip[4]; + int tx_pcr, tx_sdu, rx_pcr, rx_sdu; + __be32 ipaddr; + struct atm_qos qos; + + memset(&qos, 0, sizeof(struct atm_qos)); + + if (sscanf(buff, "del %hhu.%hhu.%hhu.%hhu", + ip, ip+1, ip+2, ip+3) == 4) { + ipaddr = *(__be32 *)ip; + return atm_mpoa_delete_qos(atm_mpoa_search_qos(ipaddr)); + } + + if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=tx", + ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu) == 6) { + rx_pcr = tx_pcr; + rx_sdu = tx_sdu; + } else if (sscanf(buff, "add %hhu.%hhu.%hhu.%hhu tx=%d,%d rx=%d,%d", + ip, ip+1, ip+2, ip+3, &tx_pcr, &tx_sdu, &rx_pcr, &rx_sdu) != 8) + return 0; + + ipaddr = *(__be32 *)ip; + qos.txtp.traffic_class = ATM_CBR; + qos.txtp.max_pcr = tx_pcr; + qos.txtp.max_sdu = tx_sdu; + qos.rxtp.traffic_class = ATM_CBR; + qos.rxtp.max_pcr = rx_pcr; + qos.rxtp.max_sdu = rx_sdu; + qos.aal = ATM_AAL5; + dprintk("mpoa: mpoa_proc.c: parse_qos(): setting qos paramameters to tx=%d,%d rx=%d,%d\n", + qos.txtp.max_pcr, + qos.txtp.max_sdu, + qos.rxtp.max_pcr, + qos.rxtp.max_sdu + ); + + atm_mpoa_add_qos(ipaddr, &qos); + return 1; +} + +/* + * INITIALIZATION function - called when module is initialized/loaded. + */ +int mpc_proc_init(void) +{ + struct proc_dir_entry *p; + + p = proc_create(STAT_FILE_NAME, 0, atm_proc_root, &mpc_file_operations); + if (!p) { + printk(KERN_ERR "Unable to initialize /proc/atm/%s\n", STAT_FILE_NAME); + return -ENOMEM; + } + p->owner = THIS_MODULE; + return 0; +} + +/* + * DELETING function - called when module is removed. + */ +void mpc_proc_clean(void) +{ + remove_proc_entry(STAT_FILE_NAME,atm_proc_root); +} + + +#endif /* CONFIG_PROC_FS */ + + + + + + diff --git a/net/atm/pppoatm.c b/net/atm/pppoatm.c new file mode 100644 index 0000000..0af84cd --- /dev/null +++ b/net/atm/pppoatm.c @@ -0,0 +1,357 @@ +/* net/atm/pppoatm.c - RFC2364 PPP over ATM/AAL5 */ + +/* Copyright 1999-2000 by Mitchell Blank Jr */ +/* Based on clip.c; 1995-1999 by Werner Almesberger, EPFL LRC/ICA */ +/* And on ppp_async.c; Copyright 1999 Paul Mackerras */ +/* And help from Jens Axboe */ + +/* + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + * + * This driver provides the encapsulation and framing for sending + * and receiving PPP frames in ATM AAL5 PDUs. + */ + +/* + * One shortcoming of this driver is that it does not comply with + * section 8 of RFC2364 - we are supposed to detect a change + * in encapsulation and immediately abort the connection (in order + * to avoid a black-hole being created if our peer loses state + * and changes encapsulation unilaterally. However, since the + * ppp_generic layer actually does the decapsulation, we need + * a way of notifying it when we _think_ there might be a problem) + * There's two cases: + * 1. LLC-encapsulation was missing when it was enabled. In + * this case, we should tell the upper layer "tear down + * this session if this skb looks ok to you" + * 2. LLC-encapsulation was present when it was disabled. Then + * we need to tell the upper layer "this packet may be + * ok, but if its in error tear down the session" + * These hooks are not yet available in ppp_generic + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "common.h" + +enum pppoatm_encaps { + e_autodetect = PPPOATM_ENCAPS_AUTODETECT, + e_vc = PPPOATM_ENCAPS_VC, + e_llc = PPPOATM_ENCAPS_LLC, +}; + +struct pppoatm_vcc { + struct atm_vcc *atmvcc; /* VCC descriptor */ + void (*old_push)(struct atm_vcc *, struct sk_buff *); + void (*old_pop)(struct atm_vcc *, struct sk_buff *); + /* keep old push/pop for detaching */ + enum pppoatm_encaps encaps; + int flags; /* SC_COMP_PROT - compress protocol */ + struct ppp_channel chan; /* interface to generic ppp layer */ + struct tasklet_struct wakeup_tasklet; +}; + +/* + * Header used for LLC Encapsulated PPP (4 bytes) followed by the LCP protocol + * ID (0xC021) used in autodetection + */ +static const unsigned char pppllc[6] = { 0xFE, 0xFE, 0x03, 0xCF, 0xC0, 0x21 }; +#define LLC_LEN (4) + +static inline struct pppoatm_vcc *atmvcc_to_pvcc(const struct atm_vcc *atmvcc) +{ + return (struct pppoatm_vcc *) (atmvcc->user_back); +} + +static inline struct pppoatm_vcc *chan_to_pvcc(const struct ppp_channel *chan) +{ + return (struct pppoatm_vcc *) (chan->private); +} + +/* + * We can't do this directly from our _pop handler, since the ppp code + * doesn't want to be called in interrupt context, so we do it from + * a tasklet + */ +static void pppoatm_wakeup_sender(unsigned long arg) +{ + ppp_output_wakeup((struct ppp_channel *) arg); +} + +/* + * This gets called every time the ATM card has finished sending our + * skb. The ->old_pop will take care up normal atm flow control, + * but we also need to wake up the device if we blocked it + */ +static void pppoatm_pop(struct atm_vcc *atmvcc, struct sk_buff *skb) +{ + struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc); + pvcc->old_pop(atmvcc, skb); + /* + * We don't really always want to do this since it's + * really inefficient - it would be much better if we could + * test if we had actually throttled the generic layer. + * Unfortunately then there would be a nasty SMP race where + * we could clear that flag just as we refuse another packet. + * For now we do the safe thing. + */ + tasklet_schedule(&pvcc->wakeup_tasklet); +} + +/* + * Unbind from PPP - currently we only do this when closing the socket, + * but we could put this into an ioctl if need be + */ +static void pppoatm_unassign_vcc(struct atm_vcc *atmvcc) +{ + struct pppoatm_vcc *pvcc; + pvcc = atmvcc_to_pvcc(atmvcc); + atmvcc->push = pvcc->old_push; + atmvcc->pop = pvcc->old_pop; + tasklet_kill(&pvcc->wakeup_tasklet); + ppp_unregister_channel(&pvcc->chan); + atmvcc->user_back = NULL; + kfree(pvcc); + /* Gee, I hope we have the big kernel lock here... */ + module_put(THIS_MODULE); +} + +/* Called when an AAL5 PDU comes in */ +static void pppoatm_push(struct atm_vcc *atmvcc, struct sk_buff *skb) +{ + struct pppoatm_vcc *pvcc = atmvcc_to_pvcc(atmvcc); + pr_debug("pppoatm push\n"); + if (skb == NULL) { /* VCC was closed */ + pr_debug("removing ATMPPP VCC %p\n", pvcc); + pppoatm_unassign_vcc(atmvcc); + atmvcc->push(atmvcc, NULL); /* Pass along bad news */ + return; + } + atm_return(atmvcc, skb->truesize); + switch (pvcc->encaps) { + case e_llc: + if (skb->len < LLC_LEN || + memcmp(skb->data, pppllc, LLC_LEN)) + goto error; + skb_pull(skb, LLC_LEN); + break; + case e_autodetect: + if (pvcc->chan.ppp == NULL) { /* Not bound yet! */ + kfree_skb(skb); + return; + } + if (skb->len >= sizeof(pppllc) && + !memcmp(skb->data, pppllc, sizeof(pppllc))) { + pvcc->encaps = e_llc; + skb_pull(skb, LLC_LEN); + break; + } + if (skb->len >= (sizeof(pppllc) - LLC_LEN) && + !memcmp(skb->data, &pppllc[LLC_LEN], + sizeof(pppllc) - LLC_LEN)) { + pvcc->encaps = e_vc; + pvcc->chan.mtu += LLC_LEN; + break; + } + pr_debug("Couldn't autodetect yet " + "(skb: %02X %02X %02X %02X %02X %02X)\n", + skb->data[0], skb->data[1], skb->data[2], + skb->data[3], skb->data[4], skb->data[5]); + goto error; + case e_vc: + break; + } + ppp_input(&pvcc->chan, skb); + return; + error: + kfree_skb(skb); + ppp_input_error(&pvcc->chan, 0); +} + +/* + * Called by the ppp_generic.c to send a packet - returns true if packet + * was accepted. If we return false, then it's our job to call + * ppp_output_wakeup(chan) when we're feeling more up to it. + * Note that in the ENOMEM case (as opposed to the !atm_may_send case) + * we should really drop the packet, but the generic layer doesn't + * support this yet. We just return 'DROP_PACKET' which we actually define + * as success, just to be clear what we're really doing. + */ +#define DROP_PACKET 1 +static int pppoatm_send(struct ppp_channel *chan, struct sk_buff *skb) +{ + struct pppoatm_vcc *pvcc = chan_to_pvcc(chan); + ATM_SKB(skb)->vcc = pvcc->atmvcc; + pr_debug("pppoatm_send (skb=0x%p, vcc=0x%p)\n", skb, pvcc->atmvcc); + if (skb->data[0] == '\0' && (pvcc->flags & SC_COMP_PROT)) + (void) skb_pull(skb, 1); + switch (pvcc->encaps) { /* LLC encapsulation needed */ + case e_llc: + if (skb_headroom(skb) < LLC_LEN) { + struct sk_buff *n; + n = skb_realloc_headroom(skb, LLC_LEN); + if (n != NULL && + !atm_may_send(pvcc->atmvcc, n->truesize)) { + kfree_skb(n); + goto nospace; + } + kfree_skb(skb); + if ((skb = n) == NULL) + return DROP_PACKET; + } else if (!atm_may_send(pvcc->atmvcc, skb->truesize)) + goto nospace; + memcpy(skb_push(skb, LLC_LEN), pppllc, LLC_LEN); + break; + case e_vc: + if (!atm_may_send(pvcc->atmvcc, skb->truesize)) + goto nospace; + break; + case e_autodetect: + pr_debug("Trying to send without setting encaps!\n"); + kfree_skb(skb); + return 1; + } + + atomic_add(skb->truesize, &sk_atm(ATM_SKB(skb)->vcc)->sk_wmem_alloc); + ATM_SKB(skb)->atm_options = ATM_SKB(skb)->vcc->atm_options; + pr_debug("atm_skb(%p)->vcc(%p)->dev(%p)\n", skb, ATM_SKB(skb)->vcc, + ATM_SKB(skb)->vcc->dev); + return ATM_SKB(skb)->vcc->send(ATM_SKB(skb)->vcc, skb) + ? DROP_PACKET : 1; + nospace: + /* + * We don't have space to send this SKB now, but we might have + * already applied SC_COMP_PROT compression, so may need to undo + */ + if ((pvcc->flags & SC_COMP_PROT) && skb_headroom(skb) > 0 && + skb->data[-1] == '\0') + (void) skb_push(skb, 1); + return 0; +} + +/* This handles ioctls sent to the /dev/ppp interface */ +static int pppoatm_devppp_ioctl(struct ppp_channel *chan, unsigned int cmd, + unsigned long arg) +{ + switch (cmd) { + case PPPIOCGFLAGS: + return put_user(chan_to_pvcc(chan)->flags, (int __user *) arg) + ? -EFAULT : 0; + case PPPIOCSFLAGS: + return get_user(chan_to_pvcc(chan)->flags, (int __user *) arg) + ? -EFAULT : 0; + } + return -ENOTTY; +} + +static /*const*/ struct ppp_channel_ops pppoatm_ops = { + .start_xmit = pppoatm_send, + .ioctl = pppoatm_devppp_ioctl, +}; + +static int pppoatm_assign_vcc(struct atm_vcc *atmvcc, void __user *arg) +{ + struct atm_backend_ppp be; + struct pppoatm_vcc *pvcc; + int err; + /* + * Each PPPoATM instance has its own tasklet - this is just a + * prototypical one used to initialize them + */ + static const DECLARE_TASKLET(tasklet_proto, pppoatm_wakeup_sender, 0); + if (copy_from_user(&be, arg, sizeof be)) + return -EFAULT; + if (be.encaps != PPPOATM_ENCAPS_AUTODETECT && + be.encaps != PPPOATM_ENCAPS_VC && be.encaps != PPPOATM_ENCAPS_LLC) + return -EINVAL; + pvcc = kzalloc(sizeof(*pvcc), GFP_KERNEL); + if (pvcc == NULL) + return -ENOMEM; + pvcc->atmvcc = atmvcc; + pvcc->old_push = atmvcc->push; + pvcc->old_pop = atmvcc->pop; + pvcc->encaps = (enum pppoatm_encaps) be.encaps; + pvcc->chan.private = pvcc; + pvcc->chan.ops = &pppoatm_ops; + pvcc->chan.mtu = atmvcc->qos.txtp.max_sdu - PPP_HDRLEN - + (be.encaps == e_vc ? 0 : LLC_LEN); + pvcc->wakeup_tasklet = tasklet_proto; + pvcc->wakeup_tasklet.data = (unsigned long) &pvcc->chan; + if ((err = ppp_register_channel(&pvcc->chan)) != 0) { + kfree(pvcc); + return err; + } + atmvcc->user_back = pvcc; + atmvcc->push = pppoatm_push; + atmvcc->pop = pppoatm_pop; + __module_get(THIS_MODULE); + return 0; +} + +/* + * This handles ioctls actually performed on our vcc - we must return + * -ENOIOCTLCMD for any unrecognized ioctl + */ +static int pppoatm_ioctl(struct socket *sock, unsigned int cmd, + unsigned long arg) +{ + struct atm_vcc *atmvcc = ATM_SD(sock); + void __user *argp = (void __user *)arg; + + if (cmd != ATM_SETBACKEND && atmvcc->push != pppoatm_push) + return -ENOIOCTLCMD; + switch (cmd) { + case ATM_SETBACKEND: { + atm_backend_t b; + if (get_user(b, (atm_backend_t __user *) argp)) + return -EFAULT; + if (b != ATM_BACKEND_PPP) + return -ENOIOCTLCMD; + if (!capable(CAP_NET_ADMIN)) + return -EPERM; + return pppoatm_assign_vcc(atmvcc, argp); + } + case PPPIOCGCHAN: + return put_user(ppp_channel_index(&atmvcc_to_pvcc(atmvcc)-> + chan), (int __user *) argp) ? -EFAULT : 0; + case PPPIOCGUNIT: + return put_user(ppp_unit_number(&atmvcc_to_pvcc(atmvcc)-> + chan), (int __user *) argp) ? -EFAULT : 0; + } + return -ENOIOCTLCMD; +} + +static struct atm_ioctl pppoatm_ioctl_ops = { + .owner = THIS_MODULE, + .ioctl = pppoatm_ioctl, +}; + +static int __init pppoatm_init(void) +{ + register_atm_ioctl(&pppoatm_ioctl_ops); + return 0; +} + +static void __exit pppoatm_exit(void) +{ + deregister_atm_ioctl(&pppoatm_ioctl_ops); +} + +module_init(pppoatm_init); +module_exit(pppoatm_exit); + +MODULE_AUTHOR("Mitchell Blank Jr "); +MODULE_DESCRIPTION("RFC2364 PPP over ATM/AAL5"); +MODULE_LICENSE("GPL"); diff --git a/net/atm/proc.c b/net/atm/proc.c new file mode 100644 index 0000000..49487b3 --- /dev/null +++ b/net/atm/proc.c @@ -0,0 +1,496 @@ +/* net/atm/proc.c - ATM /proc interface + * + * Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA + * + * seq_file api usage by romieu@fr.zoreil.com + * + * Evaluating the efficiency of the whole thing if left as an exercise to + * the reader. + */ + +#include /* for EXPORT_SYMBOL */ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include /* for __init */ +#include +#include +#include +#include +#include /* for HZ */ +#include "resources.h" +#include "common.h" /* atm_proc_init prototype */ +#include "signaling.h" /* to get sigd - ugly too */ + +static ssize_t proc_dev_atm_read(struct file *file,char __user *buf,size_t count, + loff_t *pos); + +static const struct file_operations proc_atm_dev_ops = { + .owner = THIS_MODULE, + .read = proc_dev_atm_read, +}; + +static void add_stats(struct seq_file *seq, const char *aal, + const struct k_atm_aal_stats *stats) +{ + seq_printf(seq, "%s ( %d %d %d %d %d )", aal, + atomic_read(&stats->tx),atomic_read(&stats->tx_err), + atomic_read(&stats->rx),atomic_read(&stats->rx_err), + atomic_read(&stats->rx_drop)); +} + +static void atm_dev_info(struct seq_file *seq, const struct atm_dev *dev) +{ + int i; + + seq_printf(seq, "%3d %-8s", dev->number, dev->type); + for (i = 0; i < ESI_LEN; i++) + seq_printf(seq, "%02x", dev->esi[i]); + seq_puts(seq, " "); + add_stats(seq, "0", &dev->stats.aal0); + seq_puts(seq, " "); + add_stats(seq, "5", &dev->stats.aal5); + seq_printf(seq, "\t[%d]", atomic_read(&dev->refcnt)); + seq_putc(seq, '\n'); +} + +struct vcc_state { + int bucket; + struct sock *sk; + int family; +}; + +static inline int compare_family(struct sock *sk, int family) +{ + return !family || (sk->sk_family == family); +} + +static int __vcc_walk(struct sock **sock, int family, int *bucket, loff_t l) +{ + struct sock *sk = *sock; + + if (sk == SEQ_START_TOKEN) { + for (*bucket = 0; *bucket < VCC_HTABLE_SIZE; ++*bucket) { + struct hlist_head *head = &vcc_hash[*bucket]; + + sk = hlist_empty(head) ? NULL : __sk_head(head); + if (sk) + break; + } + l--; + } +try_again: + for (; sk; sk = sk_next(sk)) { + l -= compare_family(sk, family); + if (l < 0) + goto out; + } + if (!sk && ++*bucket < VCC_HTABLE_SIZE) { + sk = sk_head(&vcc_hash[*bucket]); + goto try_again; + } + sk = SEQ_START_TOKEN; +out: + *sock = sk; + return (l < 0); +} + +static inline void *vcc_walk(struct vcc_state *state, loff_t l) +{ + return __vcc_walk(&state->sk, state->family, &state->bucket, l) ? + state : NULL; +} + +static int __vcc_seq_open(struct inode *inode, struct file *file, + int family, const struct seq_operations *ops) +{ + struct vcc_state *state; + + state = __seq_open_private(file, ops, sizeof(*state)); + if (state == NULL) + return -ENOMEM; + + state->family = family; + return 0; +} + +static void *vcc_seq_start(struct seq_file *seq, loff_t *pos) + __acquires(vcc_sklist_lock) +{ + struct vcc_state *state = seq->private; + loff_t left = *pos; + + read_lock(&vcc_sklist_lock); + state->sk = SEQ_START_TOKEN; + return left ? vcc_walk(state, left) : SEQ_START_TOKEN; +} + +static void vcc_seq_stop(struct seq_file *seq, void *v) + __releases(vcc_sklist_lock) +{ + read_unlock(&vcc_sklist_lock); +} + +static void *vcc_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + struct vcc_state *state = seq->private; + + v = vcc_walk(state, 1); + *pos += !!PTR_ERR(v); + return v; +} + +static void pvc_info(struct seq_file *seq, struct atm_vcc *vcc) +{ + static const char *class_name[] = { "off","UBR","CBR","VBR","ABR" }; + static const char *aal_name[] = { + "---", "1", "2", "3/4", /* 0- 3 */ + "???", "5", "???", "???", /* 4- 7 */ + "???", "???", "???", "???", /* 8-11 */ + "???", "0", "???", "???"}; /* 12-15 */ + + seq_printf(seq, "%3d %3d %5d %-3s %7d %-5s %7d %-6s", + vcc->dev->number,vcc->vpi,vcc->vci, + vcc->qos.aal >= ARRAY_SIZE(aal_name) ? "err" : + aal_name[vcc->qos.aal],vcc->qos.rxtp.min_pcr, + class_name[vcc->qos.rxtp.traffic_class],vcc->qos.txtp.min_pcr, + class_name[vcc->qos.txtp.traffic_class]); + if (test_bit(ATM_VF_IS_CLIP, &vcc->flags)) { + struct clip_vcc *clip_vcc = CLIP_VCC(vcc); + struct net_device *dev; + + dev = clip_vcc->entry ? clip_vcc->entry->neigh->dev : NULL; + seq_printf(seq, "CLIP, Itf:%s, Encap:", + dev ? dev->name : "none?"); + seq_printf(seq, "%s", clip_vcc->encap ? "LLC/SNAP" : "None"); + } + seq_putc(seq, '\n'); +} + +static const char *vcc_state(struct atm_vcc *vcc) +{ + static const char *map[] = { ATM_VS2TXT_MAP }; + + return map[ATM_VF2VS(vcc->flags)]; +} + +static void vcc_info(struct seq_file *seq, struct atm_vcc *vcc) +{ + struct sock *sk = sk_atm(vcc); + + seq_printf(seq, "%p ", vcc); + if (!vcc->dev) + seq_printf(seq, "Unassigned "); + else + seq_printf(seq, "%3d %3d %5d ", vcc->dev->number, vcc->vpi, + vcc->vci); + switch (sk->sk_family) { + case AF_ATMPVC: + seq_printf(seq, "PVC"); + break; + case AF_ATMSVC: + seq_printf(seq, "SVC"); + break; + default: + seq_printf(seq, "%3d", sk->sk_family); + } + seq_printf(seq, " %04lx %5d %7d/%7d %7d/%7d [%d]\n", vcc->flags, sk->sk_err, + atomic_read(&sk->sk_wmem_alloc), sk->sk_sndbuf, + atomic_read(&sk->sk_rmem_alloc), sk->sk_rcvbuf, + atomic_read(&sk->sk_refcnt)); +} + +static void svc_info(struct seq_file *seq, struct atm_vcc *vcc) +{ + if (!vcc->dev) + seq_printf(seq, sizeof(void *) == 4 ? + "N/A@%p%10s" : "N/A@%p%2s", vcc, ""); + else + seq_printf(seq, "%3d %3d %5d ", + vcc->dev->number, vcc->vpi, vcc->vci); + seq_printf(seq, "%-10s ", vcc_state(vcc)); + seq_printf(seq, "%s%s", vcc->remote.sas_addr.pub, + *vcc->remote.sas_addr.pub && *vcc->remote.sas_addr.prv ? "+" : ""); + if (*vcc->remote.sas_addr.prv) { + int i; + + for (i = 0; i < ATM_ESA_LEN; i++) + seq_printf(seq, "%02x", vcc->remote.sas_addr.prv[i]); + } + seq_putc(seq, '\n'); +} + +static int atm_dev_seq_show(struct seq_file *seq, void *v) +{ + static char atm_dev_banner[] = + "Itf Type ESI/\"MAC\"addr " + "AAL(TX,err,RX,err,drop) ... [refcnt]\n"; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, atm_dev_banner); + else { + struct atm_dev *dev = list_entry(v, struct atm_dev, dev_list); + + atm_dev_info(seq, dev); + } + return 0; +} + +static const struct seq_operations atm_dev_seq_ops = { + .start = atm_dev_seq_start, + .next = atm_dev_seq_next, + .stop = atm_dev_seq_stop, + .show = atm_dev_seq_show, +}; + +static int atm_dev_seq_open(struct inode *inode, struct file *file) +{ + return seq_open(file, &atm_dev_seq_ops); +} + +static const struct file_operations devices_seq_fops = { + .open = atm_dev_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + +static int pvc_seq_show(struct seq_file *seq, void *v) +{ + static char atm_pvc_banner[] = + "Itf VPI VCI AAL RX(PCR,Class) TX(PCR,Class)\n"; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, atm_pvc_banner); + else { + struct vcc_state *state = seq->private; + struct atm_vcc *vcc = atm_sk(state->sk); + + pvc_info(seq, vcc); + } + return 0; +} + +static const struct seq_operations pvc_seq_ops = { + .start = vcc_seq_start, + .next = vcc_seq_next, + .stop = vcc_seq_stop, + .show = pvc_seq_show, +}; + +static int pvc_seq_open(struct inode *inode, struct file *file) +{ + return __vcc_seq_open(inode, file, PF_ATMPVC, &pvc_seq_ops); +} + +static const struct file_operations pvc_seq_fops = { + .open = pvc_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_private, +}; + +static int vcc_seq_show(struct seq_file *seq, void *v) +{ + if (v == SEQ_START_TOKEN) { + seq_printf(seq, sizeof(void *) == 4 ? "%-8s%s" : "%-16s%s", + "Address ", "Itf VPI VCI Fam Flags Reply " + "Send buffer Recv buffer [refcnt]\n"); + } else { + struct vcc_state *state = seq->private; + struct atm_vcc *vcc = atm_sk(state->sk); + + vcc_info(seq, vcc); + } + return 0; +} + +static const struct seq_operations vcc_seq_ops = { + .start = vcc_seq_start, + .next = vcc_seq_next, + .stop = vcc_seq_stop, + .show = vcc_seq_show, +}; + +static int vcc_seq_open(struct inode *inode, struct file *file) +{ + return __vcc_seq_open(inode, file, 0, &vcc_seq_ops); +} + +static const struct file_operations vcc_seq_fops = { + .open = vcc_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_private, +}; + +static int svc_seq_show(struct seq_file *seq, void *v) +{ + static char atm_svc_banner[] = + "Itf VPI VCI State Remote\n"; + + if (v == SEQ_START_TOKEN) + seq_puts(seq, atm_svc_banner); + else { + struct vcc_state *state = seq->private; + struct atm_vcc *vcc = atm_sk(state->sk); + + svc_info(seq, vcc); + } + return 0; +} + +static const struct seq_operations svc_seq_ops = { + .start = vcc_seq_start, + .next = vcc_seq_next, + .stop = vcc_seq_stop, + .show = svc_seq_show, +}; + +static int svc_seq_open(struct inode *inode, struct file *file) +{ + return __vcc_seq_open(inode, file, PF_ATMSVC, &svc_seq_ops); +} + +static const struct file_operations svc_seq_fops = { + .open = svc_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_private, +}; + +static ssize_t proc_dev_atm_read(struct file *file, char __user *buf, + size_t count, loff_t *pos) +{ + struct atm_dev *dev; + unsigned long page; + int length; + + if (count == 0) return 0; + page = get_zeroed_page(GFP_KERNEL); + if (!page) return -ENOMEM; + dev = PDE(file->f_path.dentry->d_inode)->data; + if (!dev->ops->proc_read) + length = -EINVAL; + else { + length = dev->ops->proc_read(dev,pos,(char *) page); + if (length > count) length = -EINVAL; + } + if (length >= 0) { + if (copy_to_user(buf,(char *) page,length)) length = -EFAULT; + (*pos)++; + } + free_page(page); + return length; +} + + +struct proc_dir_entry *atm_proc_root; +EXPORT_SYMBOL(atm_proc_root); + + +int atm_proc_dev_register(struct atm_dev *dev) +{ + int digits,num; + int error; + + /* No proc info */ + if (!dev->ops->proc_read) + return 0; + + error = -ENOMEM; + digits = 0; + for (num = dev->number; num; num /= 10) digits++; + if (!digits) digits++; + + dev->proc_name = kmalloc(strlen(dev->type) + digits + 2, GFP_KERNEL); + if (!dev->proc_name) + goto err_out; + sprintf(dev->proc_name,"%s:%d",dev->type, dev->number); + + dev->proc_entry = proc_create_data(dev->proc_name, 0, atm_proc_root, + &proc_atm_dev_ops, dev); + if (!dev->proc_entry) + goto err_free_name; + return 0; +err_free_name: + kfree(dev->proc_name); +err_out: + return error; +} + + +void atm_proc_dev_deregister(struct atm_dev *dev) +{ + if (!dev->ops->proc_read) + return; + + remove_proc_entry(dev->proc_name, atm_proc_root); + kfree(dev->proc_name); +} + +static struct atm_proc_entry { + char *name; + const struct file_operations *proc_fops; + struct proc_dir_entry *dirent; +} atm_proc_ents[] = { + { .name = "devices", .proc_fops = &devices_seq_fops }, + { .name = "pvc", .proc_fops = &pvc_seq_fops }, + { .name = "svc", .proc_fops = &svc_seq_fops }, + { .name = "vc", .proc_fops = &vcc_seq_fops }, + { .name = NULL, .proc_fops = NULL } +}; + +static void atm_proc_dirs_remove(void) +{ + static struct atm_proc_entry *e; + + for (e = atm_proc_ents; e->name; e++) { + if (e->dirent) + remove_proc_entry(e->name, atm_proc_root); + } + proc_net_remove(&init_net, "atm"); +} + +int __init atm_proc_init(void) +{ + static struct atm_proc_entry *e; + int ret; + + atm_proc_root = proc_net_mkdir(&init_net, "atm", init_net.proc_net); + if (!atm_proc_root) + goto err_out; + for (e = atm_proc_ents; e->name; e++) { + struct proc_dir_entry *dirent; + + dirent = proc_create(e->name, S_IRUGO, + atm_proc_root, e->proc_fops); + if (!dirent) + goto err_out_remove; + dirent->owner = THIS_MODULE; + e->dirent = dirent; + } + ret = 0; +out: + return ret; + +err_out_remove: + atm_proc_dirs_remove(); +err_out: + ret = -ENOMEM; + goto out; +} + +void atm_proc_exit(void) +{ + atm_proc_dirs_remove(); +} diff --git a/net/atm/protocols.h b/net/atm/protocols.h new file mode 100644 index 0000000..acdfc85 --- /dev/null +++ b/net/atm/protocols.h @@ -0,0 +1,13 @@ +/* net/atm/protocols.h - ATM protocol handler entry points */ + +/* Written 1995-1997 by Werner Almesberger, EPFL LRC */ + + +#ifndef NET_ATM_PROTOCOLS_H +#define NET_ATM_PROTOCOLS_H + +int atm_init_aal0(struct atm_vcc *vcc); /* "raw" AAL0 */ +int atm_init_aal34(struct atm_vcc *vcc);/* "raw" AAL3/4 transport */ +int atm_init_aal5(struct atm_vcc *vcc); /* "raw" AAL5 transport */ + +#endif diff --git a/net/atm/pvc.c b/net/atm/pvc.c new file mode 100644 index 0000000..43e8bf5 --- /dev/null +++ b/net/atm/pvc.c @@ -0,0 +1,157 @@ +/* net/atm/pvc.c - ATM PVC sockets */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#include /* struct socket, struct proto_ops */ +#include /* ATM stuff */ +#include /* ATM devices */ +#include /* error codes */ +#include /* printk */ +#include +#include +#include +#include /* for sock_no_* */ + +#include "resources.h" /* devs and vccs */ +#include "common.h" /* common for PVCs and SVCs */ + + +static int pvc_shutdown(struct socket *sock,int how) +{ + return 0; +} + + +static int pvc_bind(struct socket *sock,struct sockaddr *sockaddr, + int sockaddr_len) +{ + struct sock *sk = sock->sk; + struct sockaddr_atmpvc *addr; + struct atm_vcc *vcc; + int error; + + if (sockaddr_len != sizeof(struct sockaddr_atmpvc)) return -EINVAL; + addr = (struct sockaddr_atmpvc *) sockaddr; + if (addr->sap_family != AF_ATMPVC) return -EAFNOSUPPORT; + lock_sock(sk); + vcc = ATM_SD(sock); + if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { + error = -EBADFD; + goto out; + } + if (test_bit(ATM_VF_PARTIAL,&vcc->flags)) { + if (vcc->vpi != ATM_VPI_UNSPEC) addr->sap_addr.vpi = vcc->vpi; + if (vcc->vci != ATM_VCI_UNSPEC) addr->sap_addr.vci = vcc->vci; + } + error = vcc_connect(sock, addr->sap_addr.itf, addr->sap_addr.vpi, + addr->sap_addr.vci); +out: + release_sock(sk); + return error; +} + + +static int pvc_connect(struct socket *sock,struct sockaddr *sockaddr, + int sockaddr_len,int flags) +{ + return pvc_bind(sock,sockaddr,sockaddr_len); +} + +static int pvc_setsockopt(struct socket *sock, int level, int optname, + char __user *optval, int optlen) +{ + struct sock *sk = sock->sk; + int error; + + lock_sock(sk); + error = vcc_setsockopt(sock, level, optname, optval, optlen); + release_sock(sk); + return error; +} + + +static int pvc_getsockopt(struct socket *sock, int level, int optname, + char __user *optval, int __user *optlen) +{ + struct sock *sk = sock->sk; + int error; + + lock_sock(sk); + error = vcc_getsockopt(sock, level, optname, optval, optlen); + release_sock(sk); + return error; +} + + +static int pvc_getname(struct socket *sock,struct sockaddr *sockaddr, + int *sockaddr_len,int peer) +{ + struct sockaddr_atmpvc *addr; + struct atm_vcc *vcc = ATM_SD(sock); + + if (!vcc->dev || !test_bit(ATM_VF_ADDR,&vcc->flags)) return -ENOTCONN; + *sockaddr_len = sizeof(struct sockaddr_atmpvc); + addr = (struct sockaddr_atmpvc *) sockaddr; + addr->sap_family = AF_ATMPVC; + addr->sap_addr.itf = vcc->dev->number; + addr->sap_addr.vpi = vcc->vpi; + addr->sap_addr.vci = vcc->vci; + return 0; +} + + +static const struct proto_ops pvc_proto_ops = { + .family = PF_ATMPVC, + .owner = THIS_MODULE, + + .release = vcc_release, + .bind = pvc_bind, + .connect = pvc_connect, + .socketpair = sock_no_socketpair, + .accept = sock_no_accept, + .getname = pvc_getname, + .poll = vcc_poll, + .ioctl = vcc_ioctl, + .listen = sock_no_listen, + .shutdown = pvc_shutdown, + .setsockopt = pvc_setsockopt, + .getsockopt = pvc_getsockopt, + .sendmsg = vcc_sendmsg, + .recvmsg = vcc_recvmsg, + .mmap = sock_no_mmap, + .sendpage = sock_no_sendpage, +}; + + +static int pvc_create(struct net *net, struct socket *sock,int protocol) +{ + if (net != &init_net) + return -EAFNOSUPPORT; + + sock->ops = &pvc_proto_ops; + return vcc_create(net, sock, protocol, PF_ATMPVC); +} + + +static struct net_proto_family pvc_family_ops = { + .family = PF_ATMPVC, + .create = pvc_create, + .owner = THIS_MODULE, +}; + + +/* + * Initialize the ATM PVC protocol family + */ + + +int __init atmpvc_init(void) +{ + return sock_register(&pvc_family_ops); +} + +void atmpvc_exit(void) +{ + sock_unregister(PF_ATMPVC); +} diff --git a/net/atm/raw.c b/net/atm/raw.c new file mode 100644 index 0000000..b0a2d8c --- /dev/null +++ b/net/atm/raw.c @@ -0,0 +1,90 @@ +/* net/atm/raw.c - Raw AAL0 and AAL5 transports */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#include +#include +#include +#include +#include +#include + +#include "common.h" +#include "protocols.h" + +/* + * SKB == NULL indicates that the link is being closed + */ + +static void atm_push_raw(struct atm_vcc *vcc,struct sk_buff *skb) +{ + if (skb) { + struct sock *sk = sk_atm(vcc); + + skb_queue_tail(&sk->sk_receive_queue, skb); + sk->sk_data_ready(sk, skb->len); + } +} + + +static void atm_pop_raw(struct atm_vcc *vcc,struct sk_buff *skb) +{ + struct sock *sk = sk_atm(vcc); + + pr_debug("APopR (%d) %d -= %d\n", vcc->vci, + atomic_read(&sk->sk_wmem_alloc), skb->truesize); + atomic_sub(skb->truesize, &sk->sk_wmem_alloc); + dev_kfree_skb_any(skb); + sk->sk_write_space(sk); +} + + +static int atm_send_aal0(struct atm_vcc *vcc,struct sk_buff *skb) +{ + /* + * Note that if vpi/vci are _ANY or _UNSPEC the below will + * still work + */ + if (!capable(CAP_NET_ADMIN) && + (((u32 *) skb->data)[0] & (ATM_HDR_VPI_MASK | ATM_HDR_VCI_MASK)) != + ((vcc->vpi << ATM_HDR_VPI_SHIFT) | (vcc->vci << ATM_HDR_VCI_SHIFT))) + { + kfree_skb(skb); + return -EADDRNOTAVAIL; + } + return vcc->dev->ops->send(vcc,skb); +} + + +int atm_init_aal0(struct atm_vcc *vcc) +{ + vcc->push = atm_push_raw; + vcc->pop = atm_pop_raw; + vcc->push_oam = NULL; + vcc->send = atm_send_aal0; + return 0; +} + + +int atm_init_aal34(struct atm_vcc *vcc) +{ + vcc->push = atm_push_raw; + vcc->pop = atm_pop_raw; + vcc->push_oam = NULL; + vcc->send = vcc->dev->ops->send; + return 0; +} + + +int atm_init_aal5(struct atm_vcc *vcc) +{ + vcc->push = atm_push_raw; + vcc->pop = atm_pop_raw; + vcc->push_oam = NULL; + vcc->send = vcc->dev->ops->send; + return 0; +} + + +EXPORT_SYMBOL(atm_init_aal5); diff --git a/net/atm/resources.c b/net/atm/resources.c new file mode 100644 index 0000000..a34ba94 --- /dev/null +++ b/net/atm/resources.c @@ -0,0 +1,437 @@ +/* net/atm/resources.c - Statically allocated resources */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + +/* Fixes + * Arnaldo Carvalho de Melo + * 2002/01 - don't free the whole struct sock on sk->destruct time, + * use the default destruct function initialized by sock_init_data */ + + +#include +#include +#include +#include +#include /* for barrier */ +#include +#include +#include +#include +#include + +#include /* for struct sock */ + +#include "common.h" +#include "resources.h" +#include "addr.h" + + +LIST_HEAD(atm_devs); +DEFINE_MUTEX(atm_dev_mutex); + +static struct atm_dev *__alloc_atm_dev(const char *type) +{ + struct atm_dev *dev; + + dev = kzalloc(sizeof(*dev), GFP_KERNEL); + if (!dev) + return NULL; + dev->type = type; + dev->signal = ATM_PHY_SIG_UNKNOWN; + dev->link_rate = ATM_OC3_PCR; + spin_lock_init(&dev->lock); + INIT_LIST_HEAD(&dev->local); + INIT_LIST_HEAD(&dev->lecs); + + return dev; +} + +static struct atm_dev *__atm_dev_lookup(int number) +{ + struct atm_dev *dev; + struct list_head *p; + + list_for_each(p, &atm_devs) { + dev = list_entry(p, struct atm_dev, dev_list); + if (dev->number == number) { + atm_dev_hold(dev); + return dev; + } + } + return NULL; +} + +struct atm_dev *atm_dev_lookup(int number) +{ + struct atm_dev *dev; + + mutex_lock(&atm_dev_mutex); + dev = __atm_dev_lookup(number); + mutex_unlock(&atm_dev_mutex); + return dev; +} + + +struct atm_dev *atm_dev_register(const char *type, const struct atmdev_ops *ops, + int number, unsigned long *flags) +{ + struct atm_dev *dev, *inuse; + + dev = __alloc_atm_dev(type); + if (!dev) { + printk(KERN_ERR "atm_dev_register: no space for dev %s\n", + type); + return NULL; + } + mutex_lock(&atm_dev_mutex); + if (number != -1) { + if ((inuse = __atm_dev_lookup(number))) { + atm_dev_put(inuse); + mutex_unlock(&atm_dev_mutex); + kfree(dev); + return NULL; + } + dev->number = number; + } else { + dev->number = 0; + while ((inuse = __atm_dev_lookup(dev->number))) { + atm_dev_put(inuse); + dev->number++; + } + } + + dev->ops = ops; + if (flags) + dev->flags = *flags; + else + memset(&dev->flags, 0, sizeof(dev->flags)); + memset(&dev->stats, 0, sizeof(dev->stats)); + atomic_set(&dev->refcnt, 1); + + if (atm_proc_dev_register(dev) < 0) { + printk(KERN_ERR "atm_dev_register: " + "atm_proc_dev_register failed for dev %s\n", + type); + goto out_fail; + } + + if (atm_register_sysfs(dev) < 0) { + printk(KERN_ERR "atm_dev_register: " + "atm_register_sysfs failed for dev %s\n", + type); + atm_proc_dev_deregister(dev); + goto out_fail; + } + + list_add_tail(&dev->dev_list, &atm_devs); + +out: + mutex_unlock(&atm_dev_mutex); + return dev; + +out_fail: + kfree(dev); + dev = NULL; + goto out; +} + + +void atm_dev_deregister(struct atm_dev *dev) +{ + BUG_ON(test_bit(ATM_DF_REMOVED, &dev->flags)); + set_bit(ATM_DF_REMOVED, &dev->flags); + + /* + * if we remove current device from atm_devs list, new device + * with same number can appear, such we need deregister proc, + * release async all vccs and remove them from vccs list too + */ + mutex_lock(&atm_dev_mutex); + list_del(&dev->dev_list); + mutex_unlock(&atm_dev_mutex); + + atm_dev_release_vccs(dev); + atm_unregister_sysfs(dev); + atm_proc_dev_deregister(dev); + + atm_dev_put(dev); +} + + +static void copy_aal_stats(struct k_atm_aal_stats *from, + struct atm_aal_stats *to) +{ +#define __HANDLE_ITEM(i) to->i = atomic_read(&from->i) + __AAL_STAT_ITEMS +#undef __HANDLE_ITEM +} + + +static void subtract_aal_stats(struct k_atm_aal_stats *from, + struct atm_aal_stats *to) +{ +#define __HANDLE_ITEM(i) atomic_sub(to->i, &from->i) + __AAL_STAT_ITEMS +#undef __HANDLE_ITEM +} + + +static int fetch_stats(struct atm_dev *dev, struct atm_dev_stats __user *arg, int zero) +{ + struct atm_dev_stats tmp; + int error = 0; + + copy_aal_stats(&dev->stats.aal0, &tmp.aal0); + copy_aal_stats(&dev->stats.aal34, &tmp.aal34); + copy_aal_stats(&dev->stats.aal5, &tmp.aal5); + if (arg) + error = copy_to_user(arg, &tmp, sizeof(tmp)); + if (zero && !error) { + subtract_aal_stats(&dev->stats.aal0, &tmp.aal0); + subtract_aal_stats(&dev->stats.aal34, &tmp.aal34); + subtract_aal_stats(&dev->stats.aal5, &tmp.aal5); + } + return error ? -EFAULT : 0; +} + + +int atm_dev_ioctl(unsigned int cmd, void __user *arg) +{ + void __user *buf; + int error, len, number, size = 0; + struct atm_dev *dev; + struct list_head *p; + int *tmp_buf, *tmp_p; + struct atm_iobuf __user *iobuf = arg; + struct atmif_sioc __user *sioc = arg; + switch (cmd) { + case ATM_GETNAMES: + if (get_user(buf, &iobuf->buffer)) + return -EFAULT; + if (get_user(len, &iobuf->length)) + return -EFAULT; + mutex_lock(&atm_dev_mutex); + list_for_each(p, &atm_devs) + size += sizeof(int); + if (size > len) { + mutex_unlock(&atm_dev_mutex); + return -E2BIG; + } + tmp_buf = kmalloc(size, GFP_ATOMIC); + if (!tmp_buf) { + mutex_unlock(&atm_dev_mutex); + return -ENOMEM; + } + tmp_p = tmp_buf; + list_for_each(p, &atm_devs) { + dev = list_entry(p, struct atm_dev, dev_list); + *tmp_p++ = dev->number; + } + mutex_unlock(&atm_dev_mutex); + error = ((copy_to_user(buf, tmp_buf, size)) || + put_user(size, &iobuf->length)) + ? -EFAULT : 0; + kfree(tmp_buf); + return error; + default: + break; + } + + if (get_user(buf, &sioc->arg)) + return -EFAULT; + if (get_user(len, &sioc->length)) + return -EFAULT; + if (get_user(number, &sioc->number)) + return -EFAULT; + + if (!(dev = try_then_request_module(atm_dev_lookup(number), + "atm-device-%d", number))) + return -ENODEV; + + switch (cmd) { + case ATM_GETTYPE: + size = strlen(dev->type) + 1; + if (copy_to_user(buf, dev->type, size)) { + error = -EFAULT; + goto done; + } + break; + case ATM_GETESI: + size = ESI_LEN; + if (copy_to_user(buf, dev->esi, size)) { + error = -EFAULT; + goto done; + } + break; + case ATM_SETESI: + { + int i; + + for (i = 0; i < ESI_LEN; i++) + if (dev->esi[i]) { + error = -EEXIST; + goto done; + } + } + /* fall through */ + case ATM_SETESIF: + { + unsigned char esi[ESI_LEN]; + + if (!capable(CAP_NET_ADMIN)) { + error = -EPERM; + goto done; + } + if (copy_from_user(esi, buf, ESI_LEN)) { + error = -EFAULT; + goto done; + } + memcpy(dev->esi, esi, ESI_LEN); + error = ESI_LEN; + goto done; + } + case ATM_GETSTATZ: + if (!capable(CAP_NET_ADMIN)) { + error = -EPERM; + goto done; + } + /* fall through */ + case ATM_GETSTAT: + size = sizeof(struct atm_dev_stats); + error = fetch_stats(dev, buf, cmd == ATM_GETSTATZ); + if (error) + goto done; + break; + case ATM_GETCIRANGE: + size = sizeof(struct atm_cirange); + if (copy_to_user(buf, &dev->ci_range, size)) { + error = -EFAULT; + goto done; + } + break; + case ATM_GETLINKRATE: + size = sizeof(int); + if (copy_to_user(buf, &dev->link_rate, size)) { + error = -EFAULT; + goto done; + } + break; + case ATM_RSTADDR: + if (!capable(CAP_NET_ADMIN)) { + error = -EPERM; + goto done; + } + atm_reset_addr(dev, ATM_ADDR_LOCAL); + break; + case ATM_ADDADDR: + case ATM_DELADDR: + case ATM_ADDLECSADDR: + case ATM_DELLECSADDR: + if (!capable(CAP_NET_ADMIN)) { + error = -EPERM; + goto done; + } + { + struct sockaddr_atmsvc addr; + + if (copy_from_user(&addr, buf, sizeof(addr))) { + error = -EFAULT; + goto done; + } + if (cmd == ATM_ADDADDR || cmd == ATM_ADDLECSADDR) + error = atm_add_addr(dev, &addr, + (cmd == ATM_ADDADDR ? + ATM_ADDR_LOCAL : ATM_ADDR_LECS)); + else + error = atm_del_addr(dev, &addr, + (cmd == ATM_DELADDR ? + ATM_ADDR_LOCAL : ATM_ADDR_LECS)); + goto done; + } + case ATM_GETADDR: + case ATM_GETLECSADDR: + error = atm_get_addr(dev, buf, len, + (cmd == ATM_GETADDR ? + ATM_ADDR_LOCAL : ATM_ADDR_LECS)); + if (error < 0) + goto done; + size = error; + /* may return 0, but later on size == 0 means "don't + write the length" */ + error = put_user(size, &sioc->length) + ? -EFAULT : 0; + goto done; + case ATM_SETLOOP: + if (__ATM_LM_XTRMT((int) (unsigned long) buf) && + __ATM_LM_XTLOC((int) (unsigned long) buf) > + __ATM_LM_XTRMT((int) (unsigned long) buf)) { + error = -EINVAL; + goto done; + } + /* fall through */ + case ATM_SETCIRANGE: + case SONET_GETSTATZ: + case SONET_SETDIAG: + case SONET_CLRDIAG: + case SONET_SETFRAMING: + if (!capable(CAP_NET_ADMIN)) { + error = -EPERM; + goto done; + } + /* fall through */ + default: + if (!dev->ops->ioctl) { + error = -EINVAL; + goto done; + } + size = dev->ops->ioctl(dev, cmd, buf); + if (size < 0) { + error = (size == -ENOIOCTLCMD ? -EINVAL : size); + goto done; + } + } + + if (size) + error = put_user(size, &sioc->length) + ? -EFAULT : 0; + else + error = 0; +done: + atm_dev_put(dev); + return error; +} + +static __inline__ void *dev_get_idx(loff_t left) +{ + struct list_head *p; + + list_for_each(p, &atm_devs) { + if (!--left) + break; + } + return (p != &atm_devs) ? p : NULL; +} + +void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos) +{ + mutex_lock(&atm_dev_mutex); + return *pos ? dev_get_idx(*pos) : SEQ_START_TOKEN; +} + +void atm_dev_seq_stop(struct seq_file *seq, void *v) +{ + mutex_unlock(&atm_dev_mutex); +} + +void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) +{ + ++*pos; + v = (v == SEQ_START_TOKEN) + ? atm_devs.next : ((struct list_head *)v)->next; + return (v == &atm_devs) ? NULL : v; +} + + +EXPORT_SYMBOL(atm_dev_register); +EXPORT_SYMBOL(atm_dev_deregister); +EXPORT_SYMBOL(atm_dev_lookup); diff --git a/net/atm/resources.h b/net/atm/resources.h new file mode 100644 index 0000000..1d004aa --- /dev/null +++ b/net/atm/resources.h @@ -0,0 +1,47 @@ +/* net/atm/resources.h - ATM-related resources */ + +/* Written 1995-1998 by Werner Almesberger, EPFL LRC/ICA */ + + +#ifndef NET_ATM_RESOURCES_H +#define NET_ATM_RESOURCES_H + +#include +#include + + +extern struct list_head atm_devs; +extern struct mutex atm_dev_mutex; + +int atm_dev_ioctl(unsigned int cmd, void __user *arg); + + +#ifdef CONFIG_PROC_FS + +#include + +void *atm_dev_seq_start(struct seq_file *seq, loff_t *pos); +void atm_dev_seq_stop(struct seq_file *seq, void *v); +void *atm_dev_seq_next(struct seq_file *seq, void *v, loff_t *pos); + + +int atm_proc_dev_register(struct atm_dev *dev); +void atm_proc_dev_deregister(struct atm_dev *dev); + +#else + +static inline int atm_proc_dev_register(struct atm_dev *dev) +{ + return 0; +} + +static inline void atm_proc_dev_deregister(struct atm_dev *dev) +{ + /* nothing */ +} + +#endif /* CONFIG_PROC_FS */ + +int atm_register_sysfs(struct atm_dev *adev); +void atm_unregister_sysfs(struct atm_dev *adev); +#endif diff --git a/net/atm/signaling.c b/net/atm/signaling.c new file mode 100644 index 0000000..2299214 --- /dev/null +++ b/net/atm/signaling.c @@ -0,0 +1,269 @@ +/* net/atm/signaling.c - ATM signaling */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#include /* error codes */ +#include /* printk */ +#include +#include +#include /* jiffies and HZ */ +#include /* ATM stuff */ +#include +#include +#include +#include + +#include "resources.h" +#include "signaling.h" + + +#undef WAIT_FOR_DEMON /* #define this if system calls on SVC sockets + should block until the demon runs. + Danger: may cause nasty hangs if the demon + crashes. */ + +struct atm_vcc *sigd = NULL; +#ifdef WAIT_FOR_DEMON +static DECLARE_WAIT_QUEUE_HEAD(sigd_sleep); +#endif + + +static void sigd_put_skb(struct sk_buff *skb) +{ +#ifdef WAIT_FOR_DEMON + DECLARE_WAITQUEUE(wait,current); + + add_wait_queue(&sigd_sleep,&wait); + while (!sigd) { + set_current_state(TASK_UNINTERRUPTIBLE); + pr_debug("atmsvc: waiting for signaling demon...\n"); + schedule(); + } + current->state = TASK_RUNNING; + remove_wait_queue(&sigd_sleep,&wait); +#else + if (!sigd) { + pr_debug("atmsvc: no signaling demon\n"); + kfree_skb(skb); + return; + } +#endif + atm_force_charge(sigd,skb->truesize); + skb_queue_tail(&sk_atm(sigd)->sk_receive_queue,skb); + sk_atm(sigd)->sk_data_ready(sk_atm(sigd), skb->len); +} + + +static void modify_qos(struct atm_vcc *vcc,struct atmsvc_msg *msg) +{ + struct sk_buff *skb; + + if (test_bit(ATM_VF_RELEASED,&vcc->flags) || + !test_bit(ATM_VF_READY,&vcc->flags)) + return; + msg->type = as_error; + if (!vcc->dev->ops->change_qos) msg->reply = -EOPNOTSUPP; + else { + /* should lock VCC */ + msg->reply = vcc->dev->ops->change_qos(vcc,&msg->qos, + msg->reply); + if (!msg->reply) msg->type = as_okay; + } + /* + * Should probably just turn around the old skb. But the, the buffer + * space accounting needs to follow the change too. Maybe later. + */ + while (!(skb = alloc_skb(sizeof(struct atmsvc_msg),GFP_KERNEL))) + schedule(); + *(struct atmsvc_msg *) skb_put(skb,sizeof(struct atmsvc_msg)) = *msg; + sigd_put_skb(skb); +} + + +static int sigd_send(struct atm_vcc *vcc,struct sk_buff *skb) +{ + struct atmsvc_msg *msg; + struct atm_vcc *session_vcc; + struct sock *sk; + + msg = (struct atmsvc_msg *) skb->data; + atomic_sub(skb->truesize, &sk_atm(vcc)->sk_wmem_alloc); + vcc = *(struct atm_vcc **) &msg->vcc; + pr_debug("sigd_send %d (0x%lx)\n",(int) msg->type, + (unsigned long) vcc); + sk = sk_atm(vcc); + + switch (msg->type) { + case as_okay: + sk->sk_err = -msg->reply; + clear_bit(ATM_VF_WAITING, &vcc->flags); + if (!*vcc->local.sas_addr.prv && + !*vcc->local.sas_addr.pub) { + vcc->local.sas_family = AF_ATMSVC; + memcpy(vcc->local.sas_addr.prv, + msg->local.sas_addr.prv,ATM_ESA_LEN); + memcpy(vcc->local.sas_addr.pub, + msg->local.sas_addr.pub,ATM_E164_LEN+1); + } + session_vcc = vcc->session ? vcc->session : vcc; + if (session_vcc->vpi || session_vcc->vci) break; + session_vcc->itf = msg->pvc.sap_addr.itf; + session_vcc->vpi = msg->pvc.sap_addr.vpi; + session_vcc->vci = msg->pvc.sap_addr.vci; + if (session_vcc->vpi || session_vcc->vci) + session_vcc->qos = msg->qos; + break; + case as_error: + clear_bit(ATM_VF_REGIS,&vcc->flags); + clear_bit(ATM_VF_READY,&vcc->flags); + sk->sk_err = -msg->reply; + clear_bit(ATM_VF_WAITING, &vcc->flags); + break; + case as_indicate: + vcc = *(struct atm_vcc **) &msg->listen_vcc; + sk = sk_atm(vcc); + pr_debug("as_indicate!!!\n"); + lock_sock(sk); + if (sk_acceptq_is_full(sk)) { + sigd_enq(NULL,as_reject,vcc,NULL,NULL); + dev_kfree_skb(skb); + goto as_indicate_complete; + } + sk->sk_ack_backlog++; + skb_queue_tail(&sk->sk_receive_queue, skb); + pr_debug("waking sk->sk_sleep 0x%p\n", sk->sk_sleep); + sk->sk_state_change(sk); +as_indicate_complete: + release_sock(sk); + return 0; + case as_close: + set_bit(ATM_VF_RELEASED,&vcc->flags); + vcc_release_async(vcc, msg->reply); + goto out; + case as_modify: + modify_qos(vcc,msg); + break; + case as_addparty: + case as_dropparty: + sk->sk_err_soft = msg->reply; /* < 0 failure, otherwise ep_ref */ + clear_bit(ATM_VF_WAITING, &vcc->flags); + break; + default: + printk(KERN_ALERT "sigd_send: bad message type %d\n", + (int) msg->type); + return -EINVAL; + } + sk->sk_state_change(sk); +out: + dev_kfree_skb(skb); + return 0; +} + + +void sigd_enq2(struct atm_vcc *vcc,enum atmsvc_msg_type type, + struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc, + const struct sockaddr_atmsvc *svc,const struct atm_qos *qos,int reply) +{ + struct sk_buff *skb; + struct atmsvc_msg *msg; + static unsigned session = 0; + + pr_debug("sigd_enq %d (0x%p)\n",(int) type,vcc); + while (!(skb = alloc_skb(sizeof(struct atmsvc_msg),GFP_KERNEL))) + schedule(); + msg = (struct atmsvc_msg *) skb_put(skb,sizeof(struct atmsvc_msg)); + memset(msg,0,sizeof(*msg)); + msg->type = type; + *(struct atm_vcc **) &msg->vcc = vcc; + *(struct atm_vcc **) &msg->listen_vcc = listen_vcc; + msg->reply = reply; + if (qos) msg->qos = *qos; + if (vcc) msg->sap = vcc->sap; + if (svc) msg->svc = *svc; + if (vcc) msg->local = vcc->local; + if (pvc) msg->pvc = *pvc; + if (vcc) { + if (type == as_connect && test_bit(ATM_VF_SESSION, &vcc->flags)) + msg->session = ++session; + /* every new pmp connect gets the next session number */ + } + sigd_put_skb(skb); + if (vcc) set_bit(ATM_VF_REGIS,&vcc->flags); +} + + +void sigd_enq(struct atm_vcc *vcc,enum atmsvc_msg_type type, + struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc, + const struct sockaddr_atmsvc *svc) +{ + sigd_enq2(vcc,type,listen_vcc,pvc,svc,vcc ? &vcc->qos : NULL,0); + /* other ISP applications may use "reply" */ +} + + +static void purge_vcc(struct atm_vcc *vcc) +{ + if (sk_atm(vcc)->sk_family == PF_ATMSVC && + !test_bit(ATM_VF_META, &vcc->flags)) { + set_bit(ATM_VF_RELEASED, &vcc->flags); + clear_bit(ATM_VF_REGIS, &vcc->flags); + vcc_release_async(vcc, -EUNATCH); + } +} + + +static void sigd_close(struct atm_vcc *vcc) +{ + struct hlist_node *node; + struct sock *s; + int i; + + pr_debug("sigd_close\n"); + sigd = NULL; + if (skb_peek(&sk_atm(vcc)->sk_receive_queue)) + printk(KERN_ERR "sigd_close: closing with requests pending\n"); + skb_queue_purge(&sk_atm(vcc)->sk_receive_queue); + + read_lock(&vcc_sklist_lock); + for(i = 0; i < VCC_HTABLE_SIZE; ++i) { + struct hlist_head *head = &vcc_hash[i]; + + sk_for_each(s, node, head) { + vcc = atm_sk(s); + + purge_vcc(vcc); + } + } + read_unlock(&vcc_sklist_lock); +} + + +static struct atmdev_ops sigd_dev_ops = { + .close = sigd_close, + .send = sigd_send +}; + + +static struct atm_dev sigd_dev = { + .ops = &sigd_dev_ops, + .type = "sig", + .number = 999, + .lock = __SPIN_LOCK_UNLOCKED(sigd_dev.lock) +}; + + +int sigd_attach(struct atm_vcc *vcc) +{ + if (sigd) return -EADDRINUSE; + pr_debug("sigd_attach\n"); + sigd = vcc; + vcc->dev = &sigd_dev; + vcc_insert_socket(sk_atm(vcc)); + set_bit(ATM_VF_META,&vcc->flags); + set_bit(ATM_VF_READY,&vcc->flags); +#ifdef WAIT_FOR_DEMON + wake_up(&sigd_sleep); +#endif + return 0; +} diff --git a/net/atm/signaling.h b/net/atm/signaling.h new file mode 100644 index 0000000..08b2a69 --- /dev/null +++ b/net/atm/signaling.h @@ -0,0 +1,30 @@ +/* net/atm/signaling.h - ATM signaling */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#ifndef NET_ATM_SIGNALING_H +#define NET_ATM_SIGNALING_H + +#include +#include +#include + + +extern struct atm_vcc *sigd; /* needed in svc_release */ + + +/* + * sigd_enq is a wrapper for sigd_enq2, covering the more common cases, and + * avoiding huge lists of null values. + */ + +void sigd_enq2(struct atm_vcc *vcc,enum atmsvc_msg_type type, + struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc, + const struct sockaddr_atmsvc *svc,const struct atm_qos *qos,int reply); +void sigd_enq(struct atm_vcc *vcc,enum atmsvc_msg_type type, + struct atm_vcc *listen_vcc,const struct sockaddr_atmpvc *pvc, + const struct sockaddr_atmsvc *svc); +int sigd_attach(struct atm_vcc *vcc); + +#endif diff --git a/net/atm/svc.c b/net/atm/svc.c new file mode 100644 index 0000000..8fb54dc --- /dev/null +++ b/net/atm/svc.c @@ -0,0 +1,669 @@ +/* net/atm/svc.c - ATM SVC sockets */ + +/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */ + + +#include +#include /* struct socket, struct proto_ops */ +#include /* error codes */ +#include /* printk */ +#include +#include +#include /* jiffies and HZ */ +#include /* O_NONBLOCK */ +#include +#include /* ATM stuff */ +#include +#include +#include +#include +#include /* for sock_no_* */ +#include + +#include "resources.h" +#include "common.h" /* common for PVCs and SVCs */ +#include "signaling.h" +#include "addr.h" + +static int svc_create(struct net *net, struct socket *sock,int protocol); + +/* + * Note: since all this is still nicely synchronized with the signaling demon, + * there's no need to protect sleep loops with clis. If signaling is + * moved into the kernel, that would change. + */ + + +static int svc_shutdown(struct socket *sock,int how) +{ + return 0; +} + + +static void svc_disconnect(struct atm_vcc *vcc) +{ + DEFINE_WAIT(wait); + struct sk_buff *skb; + struct sock *sk = sk_atm(vcc); + + pr_debug("svc_disconnect %p\n",vcc); + if (test_bit(ATM_VF_REGIS,&vcc->flags)) { + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + sigd_enq(vcc,as_close,NULL,NULL,NULL); + while (!test_bit(ATM_VF_RELEASED,&vcc->flags) && sigd) { + schedule(); + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + } + /* beware - socket is still in use by atmsigd until the last + as_indicate has been answered */ + while ((skb = skb_dequeue(&sk->sk_receive_queue)) != NULL) { + atm_return(vcc, skb->truesize); + pr_debug("LISTEN REL\n"); + sigd_enq2(NULL,as_reject,vcc,NULL,NULL,&vcc->qos,0); + dev_kfree_skb(skb); + } + clear_bit(ATM_VF_REGIS, &vcc->flags); + /* ... may retry later */ +} + + +static int svc_release(struct socket *sock) +{ + struct sock *sk = sock->sk; + struct atm_vcc *vcc; + + if (sk) { + vcc = ATM_SD(sock); + pr_debug("svc_release %p\n", vcc); + clear_bit(ATM_VF_READY, &vcc->flags); + /* VCC pointer is used as a reference, so we must not free it + (thereby subjecting it to re-use) before all pending connections + are closed */ + svc_disconnect(vcc); + vcc_release(sock); + } + return 0; +} + + +static int svc_bind(struct socket *sock,struct sockaddr *sockaddr, + int sockaddr_len) +{ + DEFINE_WAIT(wait); + struct sock *sk = sock->sk; + struct sockaddr_atmsvc *addr; + struct atm_vcc *vcc; + int error; + + if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) + return -EINVAL; + lock_sock(sk); + if (sock->state == SS_CONNECTED) { + error = -EISCONN; + goto out; + } + if (sock->state != SS_UNCONNECTED) { + error = -EINVAL; + goto out; + } + vcc = ATM_SD(sock); + addr = (struct sockaddr_atmsvc *) sockaddr; + if (addr->sas_family != AF_ATMSVC) { + error = -EAFNOSUPPORT; + goto out; + } + clear_bit(ATM_VF_BOUND,&vcc->flags); + /* failing rebind will kill old binding */ + /* @@@ check memory (de)allocation on rebind */ + if (!test_bit(ATM_VF_HASQOS,&vcc->flags)) { + error = -EBADFD; + goto out; + } + vcc->local = *addr; + set_bit(ATM_VF_WAITING, &vcc->flags); + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + sigd_enq(vcc,as_bind,NULL,NULL,&vcc->local); + while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { + schedule(); + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + clear_bit(ATM_VF_REGIS,&vcc->flags); /* doesn't count */ + if (!sigd) { + error = -EUNATCH; + goto out; + } + if (!sk->sk_err) + set_bit(ATM_VF_BOUND,&vcc->flags); + error = -sk->sk_err; +out: + release_sock(sk); + return error; +} + + +static int svc_connect(struct socket *sock,struct sockaddr *sockaddr, + int sockaddr_len,int flags) +{ + DEFINE_WAIT(wait); + struct sock *sk = sock->sk; + struct sockaddr_atmsvc *addr; + struct atm_vcc *vcc = ATM_SD(sock); + int error; + + pr_debug("svc_connect %p\n",vcc); + lock_sock(sk); + if (sockaddr_len != sizeof(struct sockaddr_atmsvc)) { + error = -EINVAL; + goto out; + } + + switch (sock->state) { + default: + error = -EINVAL; + goto out; + case SS_CONNECTED: + error = -EISCONN; + goto out; + case SS_CONNECTING: + if (test_bit(ATM_VF_WAITING, &vcc->flags)) { + error = -EALREADY; + goto out; + } + sock->state = SS_UNCONNECTED; + if (sk->sk_err) { + error = -sk->sk_err; + goto out; + } + break; + case SS_UNCONNECTED: + addr = (struct sockaddr_atmsvc *) sockaddr; + if (addr->sas_family != AF_ATMSVC) { + error = -EAFNOSUPPORT; + goto out; + } + if (!test_bit(ATM_VF_HASQOS, &vcc->flags)) { + error = -EBADFD; + goto out; + } + if (vcc->qos.txtp.traffic_class == ATM_ANYCLASS || + vcc->qos.rxtp.traffic_class == ATM_ANYCLASS) { + error = -EINVAL; + goto out; + } + if (!vcc->qos.txtp.traffic_class && + !vcc->qos.rxtp.traffic_class) { + error = -EINVAL; + goto out; + } + vcc->remote = *addr; + set_bit(ATM_VF_WAITING, &vcc->flags); + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + sigd_enq(vcc,as_connect,NULL,NULL,&vcc->remote); + if (flags & O_NONBLOCK) { + finish_wait(sk->sk_sleep, &wait); + sock->state = SS_CONNECTING; + error = -EINPROGRESS; + goto out; + } + error = 0; + while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { + schedule(); + if (!signal_pending(current)) { + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + continue; + } + pr_debug("*ABORT*\n"); + /* + * This is tricky: + * Kernel ---close--> Demon + * Kernel <--close--- Demon + * or + * Kernel ---close--> Demon + * Kernel <--error--- Demon + * or + * Kernel ---close--> Demon + * Kernel <--okay---- Demon + * Kernel <--close--- Demon + */ + sigd_enq(vcc,as_close,NULL,NULL,NULL); + while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + schedule(); + } + if (!sk->sk_err) + while (!test_bit(ATM_VF_RELEASED,&vcc->flags) + && sigd) { + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + schedule(); + } + clear_bit(ATM_VF_REGIS,&vcc->flags); + clear_bit(ATM_VF_RELEASED,&vcc->flags); + clear_bit(ATM_VF_CLOSE,&vcc->flags); + /* we're gone now but may connect later */ + error = -EINTR; + break; + } + finish_wait(sk->sk_sleep, &wait); + if (error) + goto out; + if (!sigd) { + error = -EUNATCH; + goto out; + } + if (sk->sk_err) { + error = -sk->sk_err; + goto out; + } + } +/* + * Not supported yet + * + * #ifndef CONFIG_SINGLE_SIGITF + */ + vcc->qos.txtp.max_pcr = SELECT_TOP_PCR(vcc->qos.txtp); + vcc->qos.txtp.pcr = 0; + vcc->qos.txtp.min_pcr = 0; +/* + * #endif + */ + if (!(error = vcc_connect(sock, vcc->itf, vcc->vpi, vcc->vci))) + sock->state = SS_CONNECTED; + else + (void) svc_disconnect(vcc); +out: + release_sock(sk); + return error; +} + + +static int svc_listen(struct socket *sock,int backlog) +{ + DEFINE_WAIT(wait); + struct sock *sk = sock->sk; + struct atm_vcc *vcc = ATM_SD(sock); + int error; + + pr_debug("svc_listen %p\n",vcc); + lock_sock(sk); + /* let server handle listen on unbound sockets */ + if (test_bit(ATM_VF_SESSION,&vcc->flags)) { + error = -EINVAL; + goto out; + } + if (test_bit(ATM_VF_LISTEN, &vcc->flags)) { + error = -EADDRINUSE; + goto out; + } + set_bit(ATM_VF_WAITING, &vcc->flags); + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + sigd_enq(vcc,as_listen,NULL,NULL,&vcc->local); + while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { + schedule(); + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + if (!sigd) { + error = -EUNATCH; + goto out; + } + set_bit(ATM_VF_LISTEN,&vcc->flags); + vcc_insert_socket(sk); + sk->sk_max_ack_backlog = backlog > 0 ? backlog : ATM_BACKLOG_DEFAULT; + error = -sk->sk_err; +out: + release_sock(sk); + return error; +} + + +static int svc_accept(struct socket *sock,struct socket *newsock,int flags) +{ + struct sock *sk = sock->sk; + struct sk_buff *skb; + struct atmsvc_msg *msg; + struct atm_vcc *old_vcc = ATM_SD(sock); + struct atm_vcc *new_vcc; + int error; + + lock_sock(sk); + + error = svc_create(sock_net(sk), newsock,0); + if (error) + goto out; + + new_vcc = ATM_SD(newsock); + + pr_debug("svc_accept %p -> %p\n",old_vcc,new_vcc); + while (1) { + DEFINE_WAIT(wait); + + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + while (!(skb = skb_dequeue(&sk->sk_receive_queue)) && + sigd) { + if (test_bit(ATM_VF_RELEASED,&old_vcc->flags)) break; + if (test_bit(ATM_VF_CLOSE,&old_vcc->flags)) { + error = -sk->sk_err; + break; + } + if (flags & O_NONBLOCK) { + error = -EAGAIN; + break; + } + release_sock(sk); + schedule(); + lock_sock(sk); + if (signal_pending(current)) { + error = -ERESTARTSYS; + break; + } + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + if (error) + goto out; + if (!skb) { + error = -EUNATCH; + goto out; + } + msg = (struct atmsvc_msg *) skb->data; + new_vcc->qos = msg->qos; + set_bit(ATM_VF_HASQOS,&new_vcc->flags); + new_vcc->remote = msg->svc; + new_vcc->local = msg->local; + new_vcc->sap = msg->sap; + error = vcc_connect(newsock, msg->pvc.sap_addr.itf, + msg->pvc.sap_addr.vpi, msg->pvc.sap_addr.vci); + dev_kfree_skb(skb); + sk->sk_ack_backlog--; + if (error) { + sigd_enq2(NULL,as_reject,old_vcc,NULL,NULL, + &old_vcc->qos,error); + error = error == -EAGAIN ? -EBUSY : error; + goto out; + } + /* wait should be short, so we ignore the non-blocking flag */ + set_bit(ATM_VF_WAITING, &new_vcc->flags); + prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + sigd_enq(new_vcc,as_accept,old_vcc,NULL,NULL); + while (test_bit(ATM_VF_WAITING, &new_vcc->flags) && sigd) { + release_sock(sk); + schedule(); + lock_sock(sk); + prepare_to_wait(sk_atm(new_vcc)->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + } + finish_wait(sk_atm(new_vcc)->sk_sleep, &wait); + if (!sigd) { + error = -EUNATCH; + goto out; + } + if (!sk_atm(new_vcc)->sk_err) + break; + if (sk_atm(new_vcc)->sk_err != ERESTARTSYS) { + error = -sk_atm(new_vcc)->sk_err; + goto out; + } + } + newsock->state = SS_CONNECTED; +out: + release_sock(sk); + return error; +} + + +static int svc_getname(struct socket *sock,struct sockaddr *sockaddr, + int *sockaddr_len,int peer) +{ + struct sockaddr_atmsvc *addr; + + *sockaddr_len = sizeof(struct sockaddr_atmsvc); + addr = (struct sockaddr_atmsvc *) sockaddr; + memcpy(addr,peer ? &ATM_SD(sock)->remote : &ATM_SD(sock)->local, + sizeof(struct sockaddr_atmsvc)); + return 0; +} + + +int svc_change_qos(struct atm_vcc *vcc,struct atm_qos *qos) +{ + struct sock *sk = sk_atm(vcc); + DEFINE_WAIT(wait); + + set_bit(ATM_VF_WAITING, &vcc->flags); + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + sigd_enq2(vcc,as_modify,NULL,NULL,&vcc->local,qos,0); + while (test_bit(ATM_VF_WAITING, &vcc->flags) && + !test_bit(ATM_VF_RELEASED, &vcc->flags) && sigd) { + schedule(); + prepare_to_wait(sk->sk_sleep, &wait, TASK_UNINTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + if (!sigd) return -EUNATCH; + return -sk->sk_err; +} + + +static int svc_setsockopt(struct socket *sock, int level, int optname, + char __user *optval, int optlen) +{ + struct sock *sk = sock->sk; + struct atm_vcc *vcc = ATM_SD(sock); + int value, error = 0; + + lock_sock(sk); + switch (optname) { + case SO_ATMSAP: + if (level != SOL_ATM || optlen != sizeof(struct atm_sap)) { + error = -EINVAL; + goto out; + } + if (copy_from_user(&vcc->sap, optval, optlen)) { + error = -EFAULT; + goto out; + } + set_bit(ATM_VF_HASSAP, &vcc->flags); + break; + case SO_MULTIPOINT: + if (level != SOL_ATM || optlen != sizeof(int)) { + error = -EINVAL; + goto out; + } + if (get_user(value, (int __user *) optval)) { + error = -EFAULT; + goto out; + } + if (value == 1) { + set_bit(ATM_VF_SESSION, &vcc->flags); + } else if (value == 0) { + clear_bit(ATM_VF_SESSION, &vcc->flags); + } else { + error = -EINVAL; + } + break; + default: + error = vcc_setsockopt(sock, level, optname, + optval, optlen); + } + +out: + release_sock(sk); + return error; +} + + +static int svc_getsockopt(struct socket *sock,int level,int optname, + char __user *optval,int __user *optlen) +{ + struct sock *sk = sock->sk; + int error = 0, len; + + lock_sock(sk); + if (!__SO_LEVEL_MATCH(optname, level) || optname != SO_ATMSAP) { + error = vcc_getsockopt(sock, level, optname, optval, optlen); + goto out; + } + if (get_user(len, optlen)) { + error = -EFAULT; + goto out; + } + if (len != sizeof(struct atm_sap)) { + error = -EINVAL; + goto out; + } + if (copy_to_user(optval, &ATM_SD(sock)->sap, sizeof(struct atm_sap))) { + error = -EFAULT; + goto out; + } +out: + release_sock(sk); + return error; +} + + +static int svc_addparty(struct socket *sock, struct sockaddr *sockaddr, + int sockaddr_len, int flags) +{ + DEFINE_WAIT(wait); + struct sock *sk = sock->sk; + struct atm_vcc *vcc = ATM_SD(sock); + int error; + + lock_sock(sk); + set_bit(ATM_VF_WAITING, &vcc->flags); + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + sigd_enq(vcc, as_addparty, NULL, NULL, + (struct sockaddr_atmsvc *) sockaddr); + if (flags & O_NONBLOCK) { + finish_wait(sk->sk_sleep, &wait); + error = -EINPROGRESS; + goto out; + } + pr_debug("svc_addparty added wait queue\n"); + while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { + schedule(); + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + error = xchg(&sk->sk_err_soft, 0); +out: + release_sock(sk); + return error; +} + + +static int svc_dropparty(struct socket *sock, int ep_ref) +{ + DEFINE_WAIT(wait); + struct sock *sk = sock->sk; + struct atm_vcc *vcc = ATM_SD(sock); + int error; + + lock_sock(sk); + set_bit(ATM_VF_WAITING, &vcc->flags); + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + sigd_enq2(vcc, as_dropparty, NULL, NULL, NULL, NULL, ep_ref); + while (test_bit(ATM_VF_WAITING, &vcc->flags) && sigd) { + schedule(); + prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE); + } + finish_wait(sk->sk_sleep, &wait); + if (!sigd) { + error = -EUNATCH; + goto out; + } + error = xchg(&sk->sk_err_soft, 0); +out: + release_sock(sk); + return error; +} + + +static int svc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg) +{ + int error, ep_ref; + struct sockaddr_atmsvc sa; + struct atm_vcc *vcc = ATM_SD(sock); + + switch (cmd) { + case ATM_ADDPARTY: + if (!test_bit(ATM_VF_SESSION, &vcc->flags)) + return -EINVAL; + if (copy_from_user(&sa, (void __user *) arg, sizeof(sa))) + return -EFAULT; + error = svc_addparty(sock, (struct sockaddr *) &sa, sizeof(sa), 0); + break; + case ATM_DROPPARTY: + if (!test_bit(ATM_VF_SESSION, &vcc->flags)) + return -EINVAL; + if (copy_from_user(&ep_ref, (void __user *) arg, sizeof(int))) + return -EFAULT; + error = svc_dropparty(sock, ep_ref); + break; + default: + error = vcc_ioctl(sock, cmd, arg); + } + + return error; +} + +static const struct proto_ops svc_proto_ops = { + .family = PF_ATMSVC, + .owner = THIS_MODULE, + + .release = svc_release, + .bind = svc_bind, + .connect = svc_connect, + .socketpair = sock_no_socketpair, + .accept = svc_accept, + .getname = svc_getname, + .poll = vcc_poll, + .ioctl = svc_ioctl, + .listen = svc_listen, + .shutdown = svc_shutdown, + .setsockopt = svc_setsockopt, + .getsockopt = svc_getsockopt, + .sendmsg = vcc_sendmsg, + .recvmsg = vcc_recvmsg, + .mmap = sock_no_mmap, + .sendpage = sock_no_sendpage, +}; + + +static int svc_create(struct net *net, struct socket *sock,int protocol) +{ + int error; + + if (net != &init_net) + return -EAFNOSUPPORT; + + sock->ops = &svc_proto_ops; + error = vcc_create(net, sock, protocol, AF_ATMSVC); + if (error) return error; + ATM_SD(sock)->local.sas_family = AF_ATMSVC; + ATM_SD(sock)->remote.sas_family = AF_ATMSVC; + return 0; +} + + +static struct net_proto_family svc_family_ops = { + .family = PF_ATMSVC, + .create = svc_create, + .owner = THIS_MODULE, +}; + + +/* + * Initialize the ATM SVC protocol family + */ + +int __init atmsvc_init(void) +{ + return sock_register(&svc_family_ops); +} + +void atmsvc_exit(void) +{ + sock_unregister(PF_ATMSVC); +} -- cgit v1.1