diff options
Diffstat (limited to 'net/core/pktgen.c')
| -rw-r--r-- | net/core/pktgen.c | 3132 |
1 files changed, 3132 insertions, 0 deletions
diff --git a/net/core/pktgen.c b/net/core/pktgen.c new file mode 100644 index 0000000..c57b06b --- /dev/null +++ b/net/core/pktgen.c @@ -0,0 +1,3132 @@ +/* + * Authors: + * Copyright 2001, 2002 by Robert Olsson <robert.olsson@its.uu.se> + * Uppsala University and + * Swedish University of Agricultural Sciences + * + * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> + * Ben Greear <greearb@candelatech.com> + * Jens Låås <jens.laas@data.slu.se> + * + * 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. + * + * + * A tool for loading the network with preconfigurated packets. + * The tool is implemented as a linux module. Parameters are output + * device, delay (to hard_xmit), number of packets, and whether + * to use multiple SKBs or just the same one. + * pktgen uses the installed interface's output routine. + * + * Additional hacking by: + * + * Jens.Laas@data.slu.se + * Improved by ANK. 010120. + * Improved by ANK even more. 010212. + * MAC address typo fixed. 010417 --ro + * Integrated. 020301 --DaveM + * Added multiskb option 020301 --DaveM + * Scaling of results. 020417--sigurdur@linpro.no + * Significant re-work of the module: + * * Convert to threaded model to more efficiently be able to transmit + * and receive on multiple interfaces at once. + * * Converted many counters to __u64 to allow longer runs. + * * Allow configuration of ranges, like min/max IP address, MACs, + * and UDP-ports, for both source and destination, and can + * set to use a random distribution or sequentially walk the range. + * * Can now change most values after starting. + * * Place 12-byte packet in UDP payload with magic number, + * sequence number, and timestamp. + * * Add receiver code that detects dropped pkts, re-ordered pkts, and + * latencies (with micro-second) precision. + * * Add IOCTL interface to easily get counters & configuration. + * --Ben Greear <greearb@candelatech.com> + * + * Renamed multiskb to clone_skb and cleaned up sending core for two distinct + * skb modes. A clone_skb=0 mode for Ben "ranges" work and a clone_skb != 0 + * as a "fastpath" with a configurable number of clones after alloc's. + * clone_skb=0 means all packets are allocated this also means ranges time + * stamps etc can be used. clone_skb=100 means 1 malloc is followed by 100 + * clones. + * + * Also moved to /proc/net/pktgen/ + * --ro + * + * Sept 10: Fixed threading/locking. Lots of bone-headed and more clever + * mistakes. Also merged in DaveM's patch in the -pre6 patch. + * --Ben Greear <greearb@candelatech.com> + * + * Integrated to 2.5.x 021029 --Lucio Maciel (luciomaciel@zipmail.com.br) + * + * + * 021124 Finished major redesign and rewrite for new functionality. + * See Documentation/networking/pktgen.txt for how to use this. + * + * The new operation: + * For each CPU one thread/process is created at start. This process checks + * for running devices in the if_list and sends packets until count is 0 it + * also the thread checks the thread->control which is used for inter-process + * communication. controlling process "posts" operations to the threads this + * way. The if_lock should be possible to remove when add/rem_device is merged + * into this too. + * + * By design there should only be *one* "controlling" process. In practice + * multiple write accesses gives unpredictable result. Understood by "write" + * to /proc gives result code thats should be read be the "writer". + * For pratical use this should be no problem. + * + * Note when adding devices to a specific CPU there good idea to also assign + * /proc/irq/XX/smp_affinity so TX-interrupts gets bound to the same CPU. + * --ro + * + * Fix refcount off by one if first packet fails, potential null deref, + * memleak 030710- KJP + * + * First "ranges" functionality for ipv6 030726 --ro + * + * Included flow support. 030802 ANK. + * + * Fixed unaligned access on IA-64 Grant Grundler <grundler@parisc-linux.org> + * + * Remove if fix from added Harald Welte <laforge@netfilter.org> 040419 + * ia64 compilation fix from Aron Griffis <aron@hp.com> 040604 + * + * New xmit() return, do_div and misc clean up by Stephen Hemminger + * <shemminger@osdl.org> 040923 + * + * Rany Dunlap fixed u64 printk compiler waring + * + * Remove FCS from BW calculation. Lennert Buytenhek <buytenh@wantstofly.org> + * New time handling. Lennert Buytenhek <buytenh@wantstofly.org> 041213 + * + * Corrections from Nikolai Malykh (nmalykh@bilim.com) + * Removed unused flags F_SET_SRCMAC & F_SET_SRCIP 041230 + * + * interruptible_sleep_on_timeout() replaced Nishanth Aravamudan <nacc@us.ibm.com> + * 050103 + */ +#include <linux/sys.h> +#include <linux/types.h> +#include <linux/module.h> +#include <linux/moduleparam.h> +#include <linux/kernel.h> +#include <linux/smp_lock.h> +#include <linux/sched.h> +#include <linux/slab.h> +#include <linux/vmalloc.h> +#include <linux/sched.h> +#include <linux/unistd.h> +#include <linux/string.h> +#include <linux/ptrace.h> +#include <linux/errno.h> +#include <linux/ioport.h> +#include <linux/interrupt.h> +#include <linux/delay.h> +#include <linux/timer.h> +#include <linux/init.h> +#include <linux/skbuff.h> +#include <linux/netdevice.h> +#include <linux/inet.h> +#include <linux/inetdevice.h> +#include <linux/rtnetlink.h> +#include <linux/if_arp.h> +#include <linux/in.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/udp.h> +#include <linux/proc_fs.h> +#include <linux/wait.h> +#include <net/checksum.h> +#include <net/ipv6.h> +#include <net/addrconf.h> +#include <asm/byteorder.h> +#include <linux/rcupdate.h> +#include <asm/bitops.h> +#include <asm/io.h> +#include <asm/dma.h> +#include <asm/uaccess.h> +#include <asm/div64.h> /* do_div */ +#include <asm/timex.h> + + +#define VERSION "pktgen v2.61: Packet Generator for packet performance testing.\n" + +/* #define PG_DEBUG(a) a */ +#define PG_DEBUG(a) + +/* The buckets are exponential in 'width' */ +#define LAT_BUCKETS_MAX 32 +#define IP_NAME_SZ 32 + +/* Device flag bits */ +#define F_IPSRC_RND (1<<0) /* IP-Src Random */ +#define F_IPDST_RND (1<<1) /* IP-Dst Random */ +#define F_UDPSRC_RND (1<<2) /* UDP-Src Random */ +#define F_UDPDST_RND (1<<3) /* UDP-Dst Random */ +#define F_MACSRC_RND (1<<4) /* MAC-Src Random */ +#define F_MACDST_RND (1<<5) /* MAC-Dst Random */ +#define F_TXSIZE_RND (1<<6) /* Transmit size is random */ +#define F_IPV6 (1<<7) /* Interface in IPV6 Mode */ + +/* Thread control flag bits */ +#define T_TERMINATE (1<<0) +#define T_STOP (1<<1) /* Stop run */ +#define T_RUN (1<<2) /* Start run */ +#define T_REMDEV (1<<3) /* Remove all devs */ + +/* Locks */ +#define thread_lock() spin_lock(&_thread_lock) +#define thread_unlock() spin_unlock(&_thread_lock) + +/* If lock -- can be removed after some work */ +#define if_lock(t) spin_lock(&(t->if_lock)); +#define if_unlock(t) spin_unlock(&(t->if_lock)); + +/* Used to help with determining the pkts on receive */ +#define PKTGEN_MAGIC 0xbe9be955 +#define PG_PROC_DIR "pktgen" + +#define MAX_CFLOWS 65536 + +struct flow_state +{ + __u32 cur_daddr; + int count; +}; + +struct pktgen_dev { + + /* + * Try to keep frequent/infrequent used vars. separated. + */ + + char ifname[32]; + struct proc_dir_entry *proc_ent; + char result[512]; + /* proc file names */ + char fname[80]; + + struct pktgen_thread* pg_thread; /* the owner */ + struct pktgen_dev *next; /* Used for chaining in the thread's run-queue */ + + int running; /* if this changes to false, the test will stop */ + + /* If min != max, then we will either do a linear iteration, or + * we will do a random selection from within the range. + */ + __u32 flags; + + int min_pkt_size; /* = ETH_ZLEN; */ + int max_pkt_size; /* = ETH_ZLEN; */ + int nfrags; + __u32 delay_us; /* Default delay */ + __u32 delay_ns; + __u64 count; /* Default No packets to send */ + __u64 sofar; /* How many pkts we've sent so far */ + __u64 tx_bytes; /* How many bytes we've transmitted */ + __u64 errors; /* Errors when trying to transmit, pkts will be re-sent */ + + /* runtime counters relating to clone_skb */ + __u64 next_tx_us; /* timestamp of when to tx next */ + __u32 next_tx_ns; + + __u64 allocated_skbs; + __u32 clone_count; + int last_ok; /* Was last skb sent? + * Or a failed transmit of some sort? This will keep + * sequence numbers in order, for example. + */ + __u64 started_at; /* micro-seconds */ + __u64 stopped_at; /* micro-seconds */ + __u64 idle_acc; /* micro-seconds */ + __u32 seq_num; + + int clone_skb; /* Use multiple SKBs during packet gen. If this number + * is greater than 1, then that many coppies of the same + * packet will be sent before a new packet is allocated. + * For instance, if you want to send 1024 identical packets + * before creating a new packet, set clone_skb to 1024. + */ + + char dst_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + char dst_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + char src_min[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + char src_max[IP_NAME_SZ]; /* IP, ie 1.2.3.4 */ + + struct in6_addr in6_saddr; + struct in6_addr in6_daddr; + struct in6_addr cur_in6_daddr; + struct in6_addr cur_in6_saddr; + /* For ranges */ + struct in6_addr min_in6_daddr; + struct in6_addr max_in6_daddr; + struct in6_addr min_in6_saddr; + struct in6_addr max_in6_saddr; + + /* If we're doing ranges, random or incremental, then this + * defines the min/max for those ranges. + */ + __u32 saddr_min; /* inclusive, source IP address */ + __u32 saddr_max; /* exclusive, source IP address */ + __u32 daddr_min; /* inclusive, dest IP address */ + __u32 daddr_max; /* exclusive, dest IP address */ + + __u16 udp_src_min; /* inclusive, source UDP port */ + __u16 udp_src_max; /* exclusive, source UDP port */ + __u16 udp_dst_min; /* inclusive, dest UDP port */ + __u16 udp_dst_max; /* exclusive, dest UDP port */ + + __u32 src_mac_count; /* How many MACs to iterate through */ + __u32 dst_mac_count; /* How many MACs to iterate through */ + + unsigned char dst_mac[6]; + unsigned char src_mac[6]; + + __u32 cur_dst_mac_offset; + __u32 cur_src_mac_offset; + __u32 cur_saddr; + __u32 cur_daddr; + __u16 cur_udp_dst; + __u16 cur_udp_src; + __u32 cur_pkt_size; + + __u8 hh[14]; + /* = { + 0x00, 0x80, 0xC8, 0x79, 0xB3, 0xCB, + + We fill in SRC address later + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x08, 0x00 + }; + */ + __u16 pad; /* pad out the hh struct to an even 16 bytes */ + + struct sk_buff* skb; /* skb we are to transmit next, mainly used for when we + * are transmitting the same one multiple times + */ + struct net_device* odev; /* The out-going device. Note that the device should + * have it's pg_info pointer pointing back to this + * device. This will be set when the user specifies + * the out-going device name (not when the inject is + * started as it used to do.) + */ + struct flow_state *flows; + unsigned cflows; /* Concurrent flows (config) */ + unsigned lflow; /* Flow length (config) */ + unsigned nflows; /* accumulated flows (stats) */ +}; + +struct pktgen_hdr { + __u32 pgh_magic; + __u32 seq_num; + __u32 tv_sec; + __u32 tv_usec; +}; + +struct pktgen_thread { + spinlock_t if_lock; + struct pktgen_dev *if_list; /* All device here */ + struct pktgen_thread* next; + char name[32]; + char fname[128]; /* name of proc file */ + struct proc_dir_entry *proc_ent; + char result[512]; + u32 max_before_softirq; /* We'll call do_softirq to prevent starvation. */ + + /* Field for thread to receive "posted" events terminate, stop ifs etc.*/ + + u32 control; + int pid; + int cpu; + + wait_queue_head_t queue; +}; + +#define REMOVE 1 +#define FIND 0 + +/* This code works around the fact that do_div cannot handle two 64-bit + numbers, and regular 64-bit division doesn't work on x86 kernels. + --Ben +*/ + +#define PG_DIV 0 + +/* This was emailed to LMKL by: Chris Caputo <ccaputo@alt.net> + * Function copied/adapted/optimized from: + * + * nemesis.sourceforge.net/browse/lib/static/intmath/ix86/intmath.c.html + * + * Copyright 1994, University of Cambridge Computer Laboratory + * All Rights Reserved. + * + */ +inline static s64 divremdi3(s64 x, s64 y, int type) +{ + u64 a = (x < 0) ? -x : x; + u64 b = (y < 0) ? -y : y; + u64 res = 0, d = 1; + + if (b > 0) { + while (b < a) { + b <<= 1; + d <<= 1; + } + } + + do { + if ( a >= b ) { + a -= b; + res += d; + } + b >>= 1; + d >>= 1; + } + while (d); + + if (PG_DIV == type) { + return (((x ^ y) & (1ll<<63)) == 0) ? res : -(s64)res; + } + else { + return ((x & (1ll<<63)) == 0) ? a : -(s64)a; + } +} + +/* End of hacks to deal with 64-bit math on x86 */ + +/** Convert to miliseconds */ +static inline __u64 tv_to_ms(const struct timeval* tv) +{ + __u64 ms = tv->tv_usec / 1000; + ms += (__u64)tv->tv_sec * (__u64)1000; + return ms; +} + + +/** Convert to micro-seconds */ +static inline __u64 tv_to_us(const struct timeval* tv) +{ + __u64 us = tv->tv_usec; + us += (__u64)tv->tv_sec * (__u64)1000000; + return us; +} + +static inline __u64 pg_div(__u64 n, __u32 base) { + __u64 tmp = n; + do_div(tmp, base); + /* printk("pktgen: pg_div, n: %llu base: %d rv: %llu\n", + n, base, tmp); */ + return tmp; +} + +static inline __u64 pg_div64(__u64 n, __u64 base) +{ + __u64 tmp = n; +/* + * How do we know if the architectrure we are running on + * supports division with 64 bit base? + * + */ +#if defined(__sparc_v9__) || defined(__powerpc64__) || defined(__alpha__) || defined(__x86_64__) || defined(__ia64__) + + do_div(tmp, base); +#else + tmp = divremdi3(n, base, PG_DIV); +#endif + return tmp; +} + +static inline u32 pktgen_random(void) +{ +#if 0 + __u32 n; + get_random_bytes(&n, 4); + return n; +#else + return net_random(); +#endif +} + +static inline __u64 getCurMs(void) +{ + struct timeval tv; + do_gettimeofday(&tv); + return tv_to_ms(&tv); +} + +static inline __u64 getCurUs(void) +{ + struct timeval tv; + do_gettimeofday(&tv); + return tv_to_us(&tv); +} + +static inline __u64 tv_diff(const struct timeval* a, const struct timeval* b) +{ + return tv_to_us(a) - tv_to_us(b); +} + + +/* old include end */ + +static char version[] __initdata = VERSION; + +static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, size_t count, loff_t *ppos); +static ssize_t proc_pgctrl_write(struct file* file, const char __user * buf, size_t count, loff_t *ppos); +static int proc_if_read(char *buf , char **start, off_t offset, int len, int *eof, void *data); + +static int proc_thread_read(char *buf , char **start, off_t offset, int len, int *eof, void *data); +static int proc_if_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data); +static int proc_thread_write(struct file *file, const char __user *user_buffer, unsigned long count, void *data); +static int create_proc_dir(void); +static int remove_proc_dir(void); + +static int pktgen_remove_device(struct pktgen_thread* t, struct pktgen_dev *i); +static int pktgen_add_device(struct pktgen_thread* t, const char* ifname); +static struct pktgen_thread* pktgen_find_thread(const char* name); +static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread* t, const char* ifname); +static int pktgen_device_event(struct notifier_block *, unsigned long, void *); +static void pktgen_run_all_threads(void); +static void pktgen_stop_all_threads_ifs(void); +static int pktgen_stop_device(struct pktgen_dev *pkt_dev); +static void pktgen_stop(struct pktgen_thread* t); +static void pktgen_clear_counters(struct pktgen_dev *pkt_dev); +static struct pktgen_dev *pktgen_NN_threads(const char* dev_name, int remove); +static unsigned int scan_ip6(const char *s,char ip[16]); +static unsigned int fmt_ip6(char *s,const char ip[16]); + +/* Module parameters, defaults. */ +static int pg_count_d = 1000; /* 1000 pkts by default */ +static int pg_delay_d = 0; +static int pg_clone_skb_d = 0; +static int debug = 0; + +static spinlock_t _thread_lock = SPIN_LOCK_UNLOCKED; +static struct pktgen_thread *pktgen_threads = NULL; + +static char module_fname[128]; +static struct proc_dir_entry *module_proc_ent = NULL; + +static struct notifier_block pktgen_notifier_block = { + .notifier_call = pktgen_device_event, +}; + +static struct file_operations pktgen_fops = { + .read = proc_pgctrl_read, + .write = proc_pgctrl_write, + /* .ioctl = pktgen_ioctl, later maybe */ +}; + +/* + * /proc handling functions + * + */ + +static struct proc_dir_entry *pg_proc_dir = NULL; +static int proc_pgctrl_read_eof=0; + +static ssize_t proc_pgctrl_read(struct file* file, char __user * buf, + size_t count, loff_t *ppos) +{ + char data[200]; + int len = 0; + + if(proc_pgctrl_read_eof) { + proc_pgctrl_read_eof=0; + len = 0; + goto out; + } + + sprintf(data, "%s", VERSION); + + len = strlen(data); + + if(len > count) { + len =-EFAULT; + goto out; + } + + if (copy_to_user(buf, data, len)) { + len =-EFAULT; + goto out; + } + + *ppos += len; + proc_pgctrl_read_eof=1; /* EOF next call */ + + out: + return len; +} + +static ssize_t proc_pgctrl_write(struct file* file,const char __user * buf, + size_t count, loff_t *ppos) +{ + char *data = NULL; + int err = 0; + + if (!capable(CAP_NET_ADMIN)){ + err = -EPERM; + goto out; + } + + data = (void*)vmalloc ((unsigned int)count); + + if(!data) { + err = -ENOMEM; + goto out; + } + if (copy_from_user(data, buf, count)) { + err =-EFAULT; + goto out_free; + } + data[count-1] = 0; /* Make string */ + + if (!strcmp(data, "stop")) + pktgen_stop_all_threads_ifs(); + + else if (!strcmp(data, "start")) + pktgen_run_all_threads(); + + else + printk("pktgen: Unknown command: %s\n", data); + + err = count; + + out_free: + vfree (data); + out: + return err; +} + +static int proc_if_read(char *buf , char **start, off_t offset, + int len, int *eof, void *data) +{ + char *p; + int i; + struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data); + __u64 sa; + __u64 stopped; + __u64 now = getCurUs(); + + p = buf; + p += sprintf(p, "Params: count %llu min_pkt_size: %u max_pkt_size: %u\n", + (unsigned long long) pkt_dev->count, + pkt_dev->min_pkt_size, pkt_dev->max_pkt_size); + + p += sprintf(p, " frags: %d delay: %u clone_skb: %d ifname: %s\n", + pkt_dev->nfrags, 1000*pkt_dev->delay_us+pkt_dev->delay_ns, pkt_dev->clone_skb, pkt_dev->ifname); + + p += sprintf(p, " flows: %u flowlen: %u\n", pkt_dev->cflows, pkt_dev->lflow); + + + if(pkt_dev->flags & F_IPV6) { + char b1[128], b2[128], b3[128]; + fmt_ip6(b1, pkt_dev->in6_saddr.s6_addr); + fmt_ip6(b2, pkt_dev->min_in6_saddr.s6_addr); + fmt_ip6(b3, pkt_dev->max_in6_saddr.s6_addr); + p += sprintf(p, " saddr: %s min_saddr: %s max_saddr: %s\n", b1, b2, b3); + + fmt_ip6(b1, pkt_dev->in6_daddr.s6_addr); + fmt_ip6(b2, pkt_dev->min_in6_daddr.s6_addr); + fmt_ip6(b3, pkt_dev->max_in6_daddr.s6_addr); + p += sprintf(p, " daddr: %s min_daddr: %s max_daddr: %s\n", b1, b2, b3); + + } + else + p += sprintf(p, " dst_min: %s dst_max: %s\n src_min: %s src_max: %s\n", + pkt_dev->dst_min, pkt_dev->dst_max, pkt_dev->src_min, pkt_dev->src_max); + + p += sprintf(p, " src_mac: "); + + if ((pkt_dev->src_mac[0] == 0) && + (pkt_dev->src_mac[1] == 0) && + (pkt_dev->src_mac[2] == 0) && + (pkt_dev->src_mac[3] == 0) && + (pkt_dev->src_mac[4] == 0) && + (pkt_dev->src_mac[5] == 0)) + + for (i = 0; i < 6; i++) + p += sprintf(p, "%02X%s", pkt_dev->odev->dev_addr[i], i == 5 ? " " : ":"); + + else + for (i = 0; i < 6; i++) + p += sprintf(p, "%02X%s", pkt_dev->src_mac[i], i == 5 ? " " : ":"); + + p += sprintf(p, "dst_mac: "); + for (i = 0; i < 6; i++) + p += sprintf(p, "%02X%s", pkt_dev->dst_mac[i], i == 5 ? "\n" : ":"); + + p += sprintf(p, " udp_src_min: %d udp_src_max: %d udp_dst_min: %d udp_dst_max: %d\n", + pkt_dev->udp_src_min, pkt_dev->udp_src_max, pkt_dev->udp_dst_min, + pkt_dev->udp_dst_max); + + p += sprintf(p, " src_mac_count: %d dst_mac_count: %d \n Flags: ", + pkt_dev->src_mac_count, pkt_dev->dst_mac_count); + + + if (pkt_dev->flags & F_IPV6) + p += sprintf(p, "IPV6 "); + + if (pkt_dev->flags & F_IPSRC_RND) + p += sprintf(p, "IPSRC_RND "); + + if (pkt_dev->flags & F_IPDST_RND) + p += sprintf(p, "IPDST_RND "); + + if (pkt_dev->flags & F_TXSIZE_RND) + p += sprintf(p, "TXSIZE_RND "); + + if (pkt_dev->flags & F_UDPSRC_RND) + p += sprintf(p, "UDPSRC_RND "); + + if (pkt_dev->flags & F_UDPDST_RND) + p += sprintf(p, "UDPDST_RND "); + + if (pkt_dev->flags & F_MACSRC_RND) + p += sprintf(p, "MACSRC_RND "); + + if (pkt_dev->flags & F_MACDST_RND) + p += sprintf(p, "MACDST_RND "); + + + p += sprintf(p, "\n"); + + sa = pkt_dev->started_at; + stopped = pkt_dev->stopped_at; + if (pkt_dev->running) + stopped = now; /* not really stopped, more like last-running-at */ + + p += sprintf(p, "Current:\n pkts-sofar: %llu errors: %llu\n started: %lluus stopped: %lluus idle: %lluus\n", + (unsigned long long) pkt_dev->sofar, + (unsigned long long) pkt_dev->errors, + (unsigned long long) sa, + (unsigned long long) stopped, + (unsigned long long) pkt_dev->idle_acc); + + p += sprintf(p, " seq_num: %d cur_dst_mac_offset: %d cur_src_mac_offset: %d\n", + pkt_dev->seq_num, pkt_dev->cur_dst_mac_offset, pkt_dev->cur_src_mac_offset); + + if(pkt_dev->flags & F_IPV6) { + char b1[128], b2[128]; + fmt_ip6(b1, pkt_dev->cur_in6_daddr.s6_addr); + fmt_ip6(b2, pkt_dev->cur_in6_saddr.s6_addr); + p += sprintf(p, " cur_saddr: %s cur_daddr: %s\n", b2, b1); + } + else + p += sprintf(p, " cur_saddr: 0x%x cur_daddr: 0x%x\n", + pkt_dev->cur_saddr, pkt_dev->cur_daddr); + + + p += sprintf(p, " cur_udp_dst: %d cur_udp_src: %d\n", + pkt_dev->cur_udp_dst, pkt_dev->cur_udp_src); + + p += sprintf(p, " flows: %u\n", pkt_dev->nflows); + + if (pkt_dev->result[0]) + p += sprintf(p, "Result: %s\n", pkt_dev->result); + else + p += sprintf(p, "Result: Idle\n"); + *eof = 1; + + return p - buf; +} + + +static int count_trail_chars(const char __user *user_buffer, unsigned int maxlen) +{ + int i; + + for (i = 0; i < maxlen; i++) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + switch (c) { + case '\"': + case '\n': + case '\r': + case '\t': + case ' ': + case '=': + break; + default: + goto done; + }; + } +done: + return i; +} + +static unsigned long num_arg(const char __user *user_buffer, unsigned long maxlen, + unsigned long *num) +{ + int i = 0; + *num = 0; + + for(; i < maxlen; i++) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + if ((c >= '0') && (c <= '9')) { + *num *= 10; + *num += c -'0'; + } else + break; + } + return i; +} + +static int strn_len(const char __user *user_buffer, unsigned int maxlen) +{ + int i = 0; + + for(; i < maxlen; i++) { + char c; + if (get_user(c, &user_buffer[i])) + return -EFAULT; + switch (c) { + case '\"': + case '\n': + case '\r': + case '\t': + case ' ': + goto done_str; + break; + default: + break; + }; + } +done_str: + + return i; +} + +static int proc_if_write(struct file *file, const char __user *user_buffer, + unsigned long count, void *data) +{ + int i = 0, max, len; + char name[16], valstr[32]; + unsigned long value = 0; + struct pktgen_dev *pkt_dev = (struct pktgen_dev*)(data); + char* pg_result = NULL; + int tmp = 0; + char buf[128]; + + pg_result = &(pkt_dev->result[0]); + + if (count < 1) { + printk("pktgen: wrong command format\n"); + return -EINVAL; + } + + max = count - i; + tmp = count_trail_chars(&user_buffer[i], max); + if (tmp < 0) { + printk("pktgen: illegal format\n"); + return tmp; + } + i += tmp; + + /* Read variable name */ + + len = strn_len(&user_buffer[i], sizeof(name) - 1); + if (len < 0) { return len; } + memset(name, 0, sizeof(name)); + if (copy_from_user(name, &user_buffer[i], len) ) + return -EFAULT; + i += len; + + max = count -i; + len = count_trail_chars(&user_buffer[i], max); + if (len < 0) + return len; + + i += len; + + if (debug) { + char tb[count + 1]; + if (copy_from_user(tb, user_buffer, count)) + return -EFAULT; + tb[count] = 0; + printk("pktgen: %s,%lu buffer -:%s:-\n", name, count, tb); + } + + if (!strcmp(name, "min_pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value < 14+20+8) + value = 14+20+8; + if (value != pkt_dev->min_pkt_size) { + pkt_dev->min_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: min_pkt_size=%u", pkt_dev->min_pkt_size); + return count; + } + + if (!strcmp(name, "max_pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value < 14+20+8) + value = 14+20+8; + if (value != pkt_dev->max_pkt_size) { + pkt_dev->max_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: max_pkt_size=%u", pkt_dev->max_pkt_size); + return count; + } + + /* Shortcut for min = max */ + + if (!strcmp(name, "pkt_size")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value < 14+20+8) + value = 14+20+8; + if (value != pkt_dev->min_pkt_size) { + pkt_dev->min_pkt_size = value; + pkt_dev->max_pkt_size = value; + pkt_dev->cur_pkt_size = value; + } + sprintf(pg_result, "OK: pkt_size=%u", pkt_dev->min_pkt_size); + return count; + } + + if (!strcmp(name, "debug")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + debug = value; + sprintf(pg_result, "OK: debug=%u", debug); + return count; + } + + if (!strcmp(name, "frags")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + pkt_dev->nfrags = value; + sprintf(pg_result, "OK: frags=%u", pkt_dev->nfrags); + return count; + } + if (!strcmp(name, "delay")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value == 0x7FFFFFFF) { + pkt_dev->delay_us = 0x7FFFFFFF; + pkt_dev->delay_ns = 0; + } else { + pkt_dev->delay_us = value / 1000; + pkt_dev->delay_ns = value % 1000; + } + sprintf(pg_result, "OK: delay=%u", 1000*pkt_dev->delay_us+pkt_dev->delay_ns); + return count; + } + if (!strcmp(name, "udp_src_min")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value != pkt_dev->udp_src_min) { + pkt_dev->udp_src_min = value; + pkt_dev->cur_udp_src = value; + } + sprintf(pg_result, "OK: udp_src_min=%u", pkt_dev->udp_src_min); + return count; + } + if (!strcmp(name, "udp_dst_min")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value != pkt_dev->udp_dst_min) { + pkt_dev->udp_dst_min = value; + pkt_dev->cur_udp_dst = value; + } + sprintf(pg_result, "OK: udp_dst_min=%u", pkt_dev->udp_dst_min); + return count; + } + if (!strcmp(name, "udp_src_max")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value != pkt_dev->udp_src_max) { + pkt_dev->udp_src_max = value; + pkt_dev->cur_udp_src = value; + } + sprintf(pg_result, "OK: udp_src_max=%u", pkt_dev->udp_src_max); + return count; + } + if (!strcmp(name, "udp_dst_max")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value != pkt_dev->udp_dst_max) { + pkt_dev->udp_dst_max = value; + pkt_dev->cur_udp_dst = value; + } + sprintf(pg_result, "OK: udp_dst_max=%u", pkt_dev->udp_dst_max); + return count; + } + if (!strcmp(name, "clone_skb")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + pkt_dev->clone_skb = value; + + sprintf(pg_result, "OK: clone_skb=%d", pkt_dev->clone_skb); + return count; + } + if (!strcmp(name, "count")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + pkt_dev->count = value; + sprintf(pg_result, "OK: count=%llu", + (unsigned long long) pkt_dev->count); + return count; + } + if (!strcmp(name, "src_mac_count")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (pkt_dev->src_mac_count != value) { + pkt_dev->src_mac_count = value; + pkt_dev->cur_src_mac_offset = 0; + } + sprintf(pg_result, "OK: src_mac_count=%d", pkt_dev->src_mac_count); + return count; + } + if (!strcmp(name, "dst_mac_count")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (pkt_dev->dst_mac_count != value) { + pkt_dev->dst_mac_count = value; + pkt_dev->cur_dst_mac_offset = 0; + } + sprintf(pg_result, "OK: dst_mac_count=%d", pkt_dev->dst_mac_count); + return count; + } + if (!strcmp(name, "flag")) { + char f[32]; + memset(f, 0, 32); + len = strn_len(&user_buffer[i], sizeof(f) - 1); + if (len < 0) { return len; } + if (copy_from_user(f, &user_buffer[i], len)) + return -EFAULT; + i += len; + if (strcmp(f, "IPSRC_RND") == 0) + pkt_dev->flags |= F_IPSRC_RND; + + else if (strcmp(f, "!IPSRC_RND") == 0) + pkt_dev->flags &= ~F_IPSRC_RND; + + else if (strcmp(f, "TXSIZE_RND") == 0) + pkt_dev->flags |= F_TXSIZE_RND; + + else if (strcmp(f, "!TXSIZE_RND") == 0) + pkt_dev->flags &= ~F_TXSIZE_RND; + + else if (strcmp(f, "IPDST_RND") == 0) + pkt_dev->flags |= F_IPDST_RND; + + else if (strcmp(f, "!IPDST_RND") == 0) + pkt_dev->flags &= ~F_IPDST_RND; + + else if (strcmp(f, "UDPSRC_RND") == 0) + pkt_dev->flags |= F_UDPSRC_RND; + + else if (strcmp(f, "!UDPSRC_RND") == 0) + pkt_dev->flags &= ~F_UDPSRC_RND; + + else if (strcmp(f, "UDPDST_RND") == 0) + pkt_dev->flags |= F_UDPDST_RND; + + else if (strcmp(f, "!UDPDST_RND") == 0) + pkt_dev->flags &= ~F_UDPDST_RND; + + else if (strcmp(f, "MACSRC_RND") == 0) + pkt_dev->flags |= F_MACSRC_RND; + + else if (strcmp(f, "!MACSRC_RND") == 0) + pkt_dev->flags &= ~F_MACSRC_RND; + + else if (strcmp(f, "MACDST_RND") == 0) + pkt_dev->flags |= F_MACDST_RND; + + else if (strcmp(f, "!MACDST_RND") == 0) + pkt_dev->flags &= ~F_MACDST_RND; + + else { + sprintf(pg_result, "Flag -:%s:- unknown\nAvailable flags, (prepend ! to un-set flag):\n%s", + f, + "IPSRC_RND, IPDST_RND, TXSIZE_RND, UDPSRC_RND, UDPDST_RND, MACSRC_RND, MACDST_RND\n"); + return count; + } + sprintf(pg_result, "OK: flags=0x%x", pkt_dev->flags); + return count; + } + if (!strcmp(name, "dst_min") || !strcmp(name, "dst")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_min) - 1); + if (len < 0) { return len; } + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->dst_min) != 0) { + memset(pkt_dev->dst_min, 0, sizeof(pkt_dev->dst_min)); + strncpy(pkt_dev->dst_min, buf, len); + pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); + pkt_dev->cur_daddr = pkt_dev->daddr_min; + } + if(debug) + printk("pktgen: dst_min set to: %s\n", pkt_dev->dst_min); + i += len; + sprintf(pg_result, "OK: dst_min=%s", pkt_dev->dst_min); + return count; + } + if (!strcmp(name, "dst_max")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->dst_max) - 1); + if (len < 0) { return len; } + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + + buf[len] = 0; + if (strcmp(buf, pkt_dev->dst_max) != 0) { + memset(pkt_dev->dst_max, 0, sizeof(pkt_dev->dst_max)); + strncpy(pkt_dev->dst_max, buf, len); + pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); + pkt_dev->cur_daddr = pkt_dev->daddr_max; + } + if(debug) + printk("pktgen: dst_max set to: %s\n", pkt_dev->dst_max); + i += len; + sprintf(pg_result, "OK: dst_max=%s", pkt_dev->dst_max); + return count; + } + if (!strcmp(name, "dst6")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->in6_daddr.s6_addr); + fmt_ip6(buf, pkt_dev->in6_daddr.s6_addr); + + ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->in6_daddr); + + if(debug) + printk("pktgen: dst6 set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6=%s", buf); + return count; + } + if (!strcmp(name, "dst6_min")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); + fmt_ip6(buf, pkt_dev->min_in6_daddr.s6_addr); + + ipv6_addr_copy(&pkt_dev->cur_in6_daddr, &pkt_dev->min_in6_daddr); + if(debug) + printk("pktgen: dst6_min set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6_min=%s", buf); + return count; + } + if (!strcmp(name, "dst6_max")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); + fmt_ip6(buf, pkt_dev->max_in6_daddr.s6_addr); + + if(debug) + printk("pktgen: dst6_max set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: dst6_max=%s", buf); + return count; + } + if (!strcmp(name, "src6")) { + len = strn_len(&user_buffer[i], sizeof(buf) - 1); + if (len < 0) return len; + + pkt_dev->flags |= F_IPV6; + + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + + scan_ip6(buf, pkt_dev->in6_saddr.s6_addr); + fmt_ip6(buf, pkt_dev->in6_saddr.s6_addr); + + ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &pkt_dev->in6_saddr); + + if(debug) + printk("pktgen: src6 set to: %s\n", buf); + + i += len; + sprintf(pg_result, "OK: src6=%s", buf); + return count; + } + if (!strcmp(name, "src_min")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_min) - 1); + if (len < 0) { return len; } + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->src_min) != 0) { + memset(pkt_dev->src_min, 0, sizeof(pkt_dev->src_min)); + strncpy(pkt_dev->src_min, buf, len); + pkt_dev->saddr_min = in_aton(pkt_dev->src_min); + pkt_dev->cur_saddr = pkt_dev->saddr_min; + } + if(debug) + printk("pktgen: src_min set to: %s\n", pkt_dev->src_min); + i += len; + sprintf(pg_result, "OK: src_min=%s", pkt_dev->src_min); + return count; + } + if (!strcmp(name, "src_max")) { + len = strn_len(&user_buffer[i], sizeof(pkt_dev->src_max) - 1); + if (len < 0) { return len; } + if (copy_from_user(buf, &user_buffer[i], len)) + return -EFAULT; + buf[len] = 0; + if (strcmp(buf, pkt_dev->src_max) != 0) { + memset(pkt_dev->src_max, 0, sizeof(pkt_dev->src_max)); + strncpy(pkt_dev->src_max, buf, len); + pkt_dev->saddr_max = in_aton(pkt_dev->src_max); + pkt_dev->cur_saddr = pkt_dev->saddr_max; + } + if(debug) + printk("pktgen: src_max set to: %s\n", pkt_dev->src_max); + i += len; + sprintf(pg_result, "OK: src_max=%s", pkt_dev->src_max); + return count; + } + if (!strcmp(name, "dst_mac")) { + char *v = valstr; + unsigned char old_dmac[6]; + unsigned char *m = pkt_dev->dst_mac; + memcpy(old_dmac, pkt_dev->dst_mac, 6); + + len = strn_len(&user_buffer[i], sizeof(valstr) - 1); + if (len < 0) { return len; } + memset(valstr, 0, sizeof(valstr)); + if( copy_from_user(valstr, &user_buffer[i], len)) + return -EFAULT; + i += len; + + for(*m = 0;*v && m < pkt_dev->dst_mac + 6; v++) { + if (*v >= '0' && *v <= '9') { + *m *= 16; + *m += *v - '0'; + } + if (*v >= 'A' && *v <= 'F') { + *m *= 16; + *m += *v - 'A' + 10; + } + if (*v >= 'a' && *v <= 'f') { + *m *= 16; + *m += *v - 'a' + 10; + } + if (*v == ':') { + m++; + *m = 0; + } + } + + /* Set up Dest MAC */ + if (memcmp(old_dmac, pkt_dev->dst_mac, 6) != 0) + memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6); + + sprintf(pg_result, "OK: dstmac"); + return count; + } + if (!strcmp(name, "src_mac")) { + char *v = valstr; + unsigned char *m = pkt_dev->src_mac; + + len = strn_len(&user_buffer[i], sizeof(valstr) - 1); + if (len < 0) { return len; } + memset(valstr, 0, sizeof(valstr)); + if( copy_from_user(valstr, &user_buffer[i], len)) + return -EFAULT; + i += len; + + for(*m = 0;*v && m < pkt_dev->src_mac + 6; v++) { + if (*v >= '0' && *v <= '9') { + *m *= 16; + *m += *v - '0'; + } + if (*v >= 'A' && *v <= 'F') { + *m *= 16; + *m += *v - 'A' + 10; + } + if (*v >= 'a' && *v <= 'f') { + *m *= 16; + *m += *v - 'a' + 10; + } + if (*v == ':') { + m++; + *m = 0; + } + } + + sprintf(pg_result, "OK: srcmac"); + return count; + } + + if (!strcmp(name, "clear_counters")) { + pktgen_clear_counters(pkt_dev); + sprintf(pg_result, "OK: Clearing counters.\n"); + return count; + } + + if (!strcmp(name, "flows")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + if (value > MAX_CFLOWS) + value = MAX_CFLOWS; + + pkt_dev->cflows = value; + sprintf(pg_result, "OK: flows=%u", pkt_dev->cflows); + return count; + } + + if (!strcmp(name, "flowlen")) { + len = num_arg(&user_buffer[i], 10, &value); + if (len < 0) { return len; } + i += len; + pkt_dev->lflow = value; + sprintf(pg_result, "OK: flowlen=%u", pkt_dev->lflow); + return count; + } + + sprintf(pkt_dev->result, "No such parameter \"%s\"", name); + return -EINVAL; +} + +static int proc_thread_read(char *buf , char **start, off_t offset, + int len, int *eof, void *data) +{ + char *p; + struct pktgen_thread *t = (struct pktgen_thread*)(data); + struct pktgen_dev *pkt_dev = NULL; + + + if (!t) { + printk("pktgen: ERROR: could not find thread in proc_thread_read\n"); + return -EINVAL; + } + + p = buf; + p += sprintf(p, "Name: %s max_before_softirq: %d\n", + t->name, t->max_before_softirq); + + p += sprintf(p, "Running: "); + + if_lock(t); + for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next) + if(pkt_dev->running) + p += sprintf(p, "%s ", pkt_dev->ifname); + + p += sprintf(p, "\nStopped: "); + + for(pkt_dev = t->if_list;pkt_dev; pkt_dev = pkt_dev->next) + if(!pkt_dev->running) + p += sprintf(p, "%s ", pkt_dev->ifname); + + if (t->result[0]) + p += sprintf(p, "\nResult: %s\n", t->result); + else + p += sprintf(p, "\nResult: NA\n"); + + *eof = 1; + + if_unlock(t); + + return p - buf; +} + +static int proc_thread_write(struct file *file, const char __user *user_buffer, + unsigned long count, void *data) +{ + int i = 0, max, len, ret; + char name[40]; + struct pktgen_thread *t; + char *pg_result; + unsigned long value = 0; + + if (count < 1) { + // sprintf(pg_result, "Wrong command format"); + return -EINVAL; + } + + max = count - i; + len = count_trail_chars(&user_buffer[i], max); + if (len < 0) + return len; + + i += len; + + /* Read variable name */ + + len = strn_len(&user_buffer[i], sizeof(name) - 1); + if (len < 0) + return len; + + memset(name, 0, sizeof(name)); + if (copy_from_user(name, &user_buffer[i], len)) + return -EFAULT; + i += len; + + max = count -i; + len = count_trail_chars(&user_buffer[i], max); + if (len < 0) + return len; + + i += len; + + if (debug) + printk("pktgen: t=%s, count=%lu\n", name, count); + + + t = (struct pktgen_thread*)(data); + if(!t) { + printk("pktgen: ERROR: No thread\n"); + ret = -EINVAL; + goto out; + } + + pg_result = &(t->result[0]); + + if (!strcmp(name, "add_device")) { + char f[32]; + memset(f, 0, 32); + len = strn_len(&user_buffer[i], sizeof(f) - 1); + if (len < 0) { + ret = len; + goto out; + } + if( copy_from_user(f, &user_buffer[i], len) ) + return -EFAULT; + i += len; + thread_lock(); + pktgen_add_device(t, f); + thread_unlock(); + ret = count; + sprintf(pg_result, "OK: add_device=%s", f); + goto out; + } + + if (!strcmp(name, "rem_device_all")) { + thread_lock(); + t->control |= T_REMDEV; + thread_unlock(); + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(HZ/8); /* Propagate thread->control */ + ret = count; + sprintf(pg_result, "OK: rem_device_all"); + goto out; + } + + if (!strcmp(name, "max_before_softirq")) { + len = num_arg(&user_buffer[i], 10, &value); + thread_lock(); + t->max_before_softirq = value; + thread_unlock(); + ret = count; + sprintf(pg_result, "OK: max_before_softirq=%lu", value); + goto out; + } + + ret = -EINVAL; + out: + + return ret; +} + +static int create_proc_dir(void) +{ + int len; + /* does proc_dir already exists */ + len = strlen(PG_PROC_DIR); + + for (pg_proc_dir = proc_net->subdir; pg_proc_dir; pg_proc_dir=pg_proc_dir->next) { + if ((pg_proc_dir->namelen == len) && + (! memcmp(pg_proc_dir->name, PG_PROC_DIR, len))) + break; + } + + if (!pg_proc_dir) + pg_proc_dir = create_proc_entry(PG_PROC_DIR, S_IFDIR, proc_net); + + if (!pg_proc_dir) + return -ENODEV; + + return 0; +} + +static int remove_proc_dir(void) +{ + remove_proc_entry(PG_PROC_DIR, proc_net); + return 0; +} + +/* Think find or remove for NN */ +static struct pktgen_dev *__pktgen_NN_threads(const char* ifname, int remove) +{ + struct pktgen_thread *t; + struct pktgen_dev *pkt_dev = NULL; + + t = pktgen_threads; + + while (t) { + pkt_dev = pktgen_find_dev(t, ifname); + if (pkt_dev) { + if(remove) { + if_lock(t); + pktgen_remove_device(t, pkt_dev); + if_unlock(t); + } + break; + } + t = t->next; + } + return pkt_dev; +} + +static struct pktgen_dev *pktgen_NN_threads(const char* ifname, int remove) +{ + struct pktgen_dev *pkt_dev = NULL; + thread_lock(); + pkt_dev = __pktgen_NN_threads(ifname, remove); + thread_unlock(); + return pkt_dev; +} + +static int pktgen_device_event(struct notifier_block *unused, unsigned long event, void *ptr) +{ + struct net_device *dev = (struct net_device *)(ptr); + + /* It is OK that we do not hold the group lock right now, + * as we run under the RTNL lock. + */ + + switch (event) { + case NETDEV_CHANGEADDR: + case NETDEV_GOING_DOWN: + case NETDEV_DOWN: + case NETDEV_UP: + /* Ignore for now */ + break; + + case NETDEV_UNREGISTER: + pktgen_NN_threads(dev->name, REMOVE); + break; + }; + + return NOTIFY_DONE; +} + +/* Associate pktgen_dev with a device. */ + +static struct net_device* pktgen_setup_dev(struct pktgen_dev *pkt_dev) { + struct net_device *odev; + + /* Clean old setups */ + + if (pkt_dev->odev) { + dev_put(pkt_dev->odev); + pkt_dev->odev = NULL; + } + + odev = dev_get_by_name(pkt_dev->ifname); + + if (!odev) { + printk("pktgen: no such netdevice: \"%s\"\n", pkt_dev->ifname); + goto out; + } + if (odev->type != ARPHRD_ETHER) { + printk("pktgen: not an ethernet device: \"%s\"\n", pkt_dev->ifname); + goto out_put; + } + if (!netif_running(odev)) { + printk("pktgen: device is down: \"%s\"\n", pkt_dev->ifname); + goto out_put; + } + pkt_dev->odev = odev; + + return pkt_dev->odev; + +out_put: + dev_put(odev); +out: + return NULL; + +} + +/* Read pkt_dev from the interface and set up internal pktgen_dev + * structure to have the right information to create/send packets + */ +static void pktgen_setup_inject(struct pktgen_dev *pkt_dev) +{ + /* Try once more, just in case it works now. */ + if (!pkt_dev->odev) + pktgen_setup_dev(pkt_dev); + + if (!pkt_dev->odev) { + printk("pktgen: ERROR: pkt_dev->odev == NULL in setup_inject.\n"); + sprintf(pkt_dev->result, "ERROR: pkt_dev->odev == NULL in setup_inject.\n"); + return; + } + + /* Default to the interface's mac if not explicitly set. */ + + if ((pkt_dev->src_mac[0] == 0) && + (pkt_dev->src_mac[1] == 0) && + (pkt_dev->src_mac[2] == 0) && + (pkt_dev->src_mac[3] == 0) && + (pkt_dev->src_mac[4] == 0) && + (pkt_dev->src_mac[5] == 0)) { + + memcpy(&(pkt_dev->hh[6]), pkt_dev->odev->dev_addr, 6); + } + /* Set up Dest MAC */ + memcpy(&(pkt_dev->hh[0]), pkt_dev->dst_mac, 6); + + /* Set up pkt size */ + pkt_dev->cur_pkt_size = pkt_dev->min_pkt_size; + + if(pkt_dev->flags & F_IPV6) { + /* + * Skip this automatic address setting until locks or functions + * gets exported + */ + +#ifdef NOTNOW + int i, set = 0, err=1; + struct inet6_dev *idev; + + for(i=0; i< IN6_ADDR_HSIZE; i++) + if(pkt_dev->cur_in6_saddr.s6_addr[i]) { + set = 1; + break; + } + + if(!set) { + + /* + * Use linklevel address if unconfigured. + * + * use ipv6_get_lladdr if/when it's get exported + */ + + + read_lock(&addrconf_lock); + if ((idev = __in6_dev_get(pkt_dev->odev)) != NULL) { + struct inet6_ifaddr *ifp; + + read_lock_bh(&idev->lock); + for (ifp=idev->addr_list; ifp; ifp=ifp->if_next) { + if (ifp->scope == IFA_LINK && !(ifp->flags&IFA_F_TENTATIVE)) { + ipv6_addr_copy(&pkt_dev->cur_in6_saddr, &ifp->addr); + err = 0; + break; + } + } + read_unlock_bh(&idev->lock); + } + read_unlock(&addrconf_lock); + if(err) printk("pktgen: ERROR: IPv6 link address not availble.\n"); + } +#endif + } + else { + pkt_dev->saddr_min = 0; + pkt_dev->saddr_max = 0; + if (strlen(pkt_dev->src_min) == 0) { + + struct in_device *in_dev; + + rcu_read_lock(); + in_dev = __in_dev_get(pkt_dev->odev); + if (in_dev) { + if (in_dev->ifa_list) { + pkt_dev->saddr_min = in_dev->ifa_list->ifa_address; + pkt_dev->saddr_max = pkt_dev->saddr_min; + } + __in_dev_put(in_dev); + } + rcu_read_unlock(); + } + else { + pkt_dev->saddr_min = in_aton(pkt_dev->src_min); + pkt_dev->saddr_max = in_aton(pkt_dev->src_max); + } + + pkt_dev->daddr_min = in_aton(pkt_dev->dst_min); + pkt_dev->daddr_max = in_aton(pkt_dev->dst_max); + } + /* Initialize current values. */ + pkt_dev->cur_dst_mac_offset = 0; + pkt_dev->cur_src_mac_offset = 0; + pkt_dev->cur_saddr = pkt_dev->saddr_min; + pkt_dev->cur_daddr = pkt_dev->daddr_min; + pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; + pkt_dev->cur_udp_src = pkt_dev->udp_src_min; + pkt_dev->nflows = 0; +} + +static void spin(struct pktgen_dev *pkt_dev, __u64 spin_until_us) +{ + __u64 start; + __u64 now; + + start = now = getCurUs(); + printk(KERN_INFO "sleeping for %d\n", (int)(spin_until_us - now)); + while (now < spin_until_us) { + /* TODO: optimise sleeping behavior */ + if (spin_until_us - now > (1000000/HZ)+1) { + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(1); + } else if (spin_until_us - now > 100) { + do_softirq(); + if (!pkt_dev->running) + return; + if (need_resched()) + schedule(); + } + + now = getCurUs(); + } + + pkt_dev->idle_acc += now - start; +} + + +/* Increment/randomize headers according to flags and current values + * for IP src/dest, UDP src/dst port, MAC-Addr src/dst + */ +static void mod_cur_headers(struct pktgen_dev *pkt_dev) { + __u32 imn; + __u32 imx; + int flow = 0; + + if(pkt_dev->cflows) { + flow = pktgen_random() % pkt_dev->cflows; + + if (pkt_dev->flows[flow].count > pkt_dev->lflow) + pkt_dev->flows[flow].count = 0; + } + + + /* Deal with source MAC */ + if (pkt_dev->src_mac_count > 1) { + __u32 mc; + __u32 tmp; + + if (pkt_dev->flags & F_MACSRC_RND) + mc = pktgen_random() % (pkt_dev->src_mac_count); + else { + mc = pkt_dev->cur_src_mac_offset++; + if (pkt_dev->cur_src_mac_offset > pkt_dev->src_mac_count) + pkt_dev->cur_src_mac_offset = 0; + } + + tmp = pkt_dev->src_mac[5] + (mc & 0xFF); + pkt_dev->hh[11] = tmp; + tmp = (pkt_dev->src_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[10] = tmp; + tmp = (pkt_dev->src_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[9] = tmp; + tmp = (pkt_dev->src_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[8] = tmp; + tmp = (pkt_dev->src_mac[1] + (tmp >> 8)); + pkt_dev->hh[7] = tmp; + } + + /* Deal with Destination MAC */ + if (pkt_dev->dst_mac_count > 1) { + __u32 mc; + __u32 tmp; + + if (pkt_dev->flags & F_MACDST_RND) + mc = pktgen_random() % (pkt_dev->dst_mac_count); + + else { + mc = pkt_dev->cur_dst_mac_offset++; + if (pkt_dev->cur_dst_mac_offset > pkt_dev->dst_mac_count) { + pkt_dev->cur_dst_mac_offset = 0; + } + } + + tmp = pkt_dev->dst_mac[5] + (mc & 0xFF); + pkt_dev->hh[5] = tmp; + tmp = (pkt_dev->dst_mac[4] + ((mc >> 8) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[4] = tmp; + tmp = (pkt_dev->dst_mac[3] + ((mc >> 16) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[3] = tmp; + tmp = (pkt_dev->dst_mac[2] + ((mc >> 24) & 0xFF) + (tmp >> 8)); + pkt_dev->hh[2] = tmp; + tmp = (pkt_dev->dst_mac[1] + (tmp >> 8)); + pkt_dev->hh[1] = tmp; + } + + if (pkt_dev->udp_src_min < pkt_dev->udp_src_max) { + if (pkt_dev->flags & F_UDPSRC_RND) + pkt_dev->cur_udp_src = ((pktgen_random() % (pkt_dev->udp_src_max - pkt_dev->udp_src_min)) + pkt_dev->udp_src_min); + + else { + pkt_dev->cur_udp_src++; + if (pkt_dev->cur_udp_src >= pkt_dev->udp_src_max) + pkt_dev->cur_udp_src = pkt_dev->udp_src_min; + } + } + + if (pkt_dev->udp_dst_min < pkt_dev->udp_dst_max) { + if (pkt_dev->flags & F_UDPDST_RND) { + pkt_dev->cur_udp_dst = ((pktgen_random() % (pkt_dev->udp_dst_max - pkt_dev->udp_dst_min)) + pkt_dev->udp_dst_min); + } + else { + pkt_dev->cur_udp_dst++; + if (pkt_dev->cur_udp_dst >= pkt_dev->udp_dst_max) + pkt_dev->cur_udp_dst = pkt_dev->udp_dst_min; + } + } + + if (!(pkt_dev->flags & F_IPV6)) { + + if ((imn = ntohl(pkt_dev->saddr_min)) < (imx = ntohl(pkt_dev->saddr_max))) { + __u32 t; + if (pkt_dev->flags & F_IPSRC_RND) + t = ((pktgen_random() % (imx - imn)) + imn); + else { + t = ntohl(pkt_dev->cur_saddr); + t++; + if (t > imx) { + t = imn; + } + } + pkt_dev->cur_saddr = htonl(t); + } + + if (pkt_dev->cflows && pkt_dev->flows[flow].count != 0) { + pkt_dev->cur_daddr = pkt_dev->flows[flow].cur_daddr; + } else { + + if ((imn = ntohl(pkt_dev->daddr_min)) < (imx = ntohl(pkt_dev->daddr_max))) { + __u32 t; + if (pkt_dev->flags & F_IPDST_RND) { + + t = ((pktgen_random() % (imx - imn)) + imn); + t = htonl(t); + + while( LOOPBACK(t) || MULTICAST(t) || BADCLASS(t) || ZERONET(t) || LOCAL_MCAST(t) ) { + t = ((pktgen_random() % (imx - imn)) + imn); + t = htonl(t); + } + pkt_dev->cur_daddr = t; + } + + else { + t = ntohl(pkt_dev->cur_daddr); + t++; + if (t > imx) { + t = imn; + } + pkt_dev->cur_daddr = htonl(t); + } + } + if(pkt_dev->cflows) { + pkt_dev->flows[flow].cur_daddr = pkt_dev->cur_daddr; + pkt_dev->nflows++; + } + } + } + else /* IPV6 * */ + { + if(pkt_dev->min_in6_daddr.s6_addr32[0] == 0 && + pkt_dev->min_in6_daddr.s6_addr32[1] == 0 && + pkt_dev->min_in6_daddr.s6_addr32[2] == 0 && + pkt_dev->min_in6_daddr.s6_addr32[3] == 0); + else { + int i; + + /* Only random destinations yet */ + + for(i=0; i < 4; i++) { + pkt_dev->cur_in6_daddr.s6_addr32[i] = + ((pktgen_random() | + pkt_dev->min_in6_daddr.s6_addr32[i]) & + pkt_dev->max_in6_daddr.s6_addr32[i]); + } + } + } + + if (pkt_dev->min_pkt_size < pkt_dev->max_pkt_size) { + __u32 t; + if (pkt_dev->flags & F_TXSIZE_RND) { + t = ((pktgen_random() % (pkt_dev->max_pkt_size - pkt_dev->min_pkt_size)) + + pkt_dev->min_pkt_size); + } + else { + t = pkt_dev->cur_pkt_size + 1; + if (t > pkt_dev->max_pkt_size) + t = pkt_dev->min_pkt_size; + } + pkt_dev->cur_pkt_size = t; + } + + pkt_dev->flows[flow].count++; +} + + +static struct sk_buff *fill_packet_ipv4(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + struct sk_buff *skb = NULL; + __u8 *eth; + struct udphdr *udph; + int datalen, iplen; + struct iphdr *iph; + struct pktgen_hdr *pgh = NULL; + + skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC); + if (!skb) { + sprintf(pkt_dev->result, "No memory"); + return NULL; + } + + skb_reserve(skb, 16); + + /* Reserve for ethernet and IP header */ + eth = (__u8 *) skb_push(skb, 14); + iph = (struct iphdr *)skb_put(skb, sizeof(struct iphdr)); + udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr)); + + /* Update any of the values, used when we're incrementing various + * fields. + */ + mod_cur_headers(pkt_dev); + + memcpy(eth, pkt_dev->hh, 12); + *(u16*)ð[12] = __constant_htons(ETH_P_IP); + + datalen = pkt_dev->cur_pkt_size - 14 - 20 - 8; /* Eth + IPh + UDPh */ + if (datalen < sizeof(struct pktgen_hdr)) + datalen = sizeof(struct pktgen_hdr); + + udph->source = htons(pkt_dev->cur_udp_src); + udph->dest = htons(pkt_dev->cur_udp_dst); + udph->len = htons(datalen + 8); /* DATA + udphdr */ + udph->check = 0; /* No checksum */ + + iph->ihl = 5; + iph->version = 4; + iph->ttl = 32; + iph->tos = 0; + iph->protocol = IPPROTO_UDP; /* UDP */ + iph->saddr = pkt_dev->cur_saddr; + iph->daddr = pkt_dev->cur_daddr; + iph->frag_off = 0; + iplen = 20 + 8 + datalen; + iph->tot_len = htons(iplen); + iph->check = 0; + iph->check = ip_fast_csum((void *) iph, iph->ihl); + skb->protocol = __constant_htons(ETH_P_IP); + skb->mac.raw = ((u8 *)iph) - 14; + skb->dev = odev; + skb->pkt_type = PACKET_HOST; + + if (pkt_dev->nfrags <= 0) + pgh = (struct pktgen_hdr *)skb_put(skb, datalen); + else { + int frags = pkt_dev->nfrags; + int i; + + pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8); + + if (frags > MAX_SKB_FRAGS) + frags = MAX_SKB_FRAGS; + if (datalen > frags*PAGE_SIZE) { + skb_put(skb, datalen-frags*PAGE_SIZE); + datalen = frags*PAGE_SIZE; + } + + i = 0; + while (datalen > 0) { + struct page *page = alloc_pages(GFP_KERNEL, 0); + skb_shinfo(skb)->frags[i].page = page; + skb_shinfo(skb)->frags[i].page_offset = 0; + skb_shinfo(skb)->frags[i].size = + (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); + datalen -= skb_shinfo(skb)->frags[i].size; + skb->len += skb_shinfo(skb)->frags[i].size; + skb->data_len += skb_shinfo(skb)->frags[i].size; + i++; + skb_shinfo(skb)->nr_frags = i; + } + + while (i < frags) { + int rem; + + if (i == 0) + break; + + rem = skb_shinfo(skb)->frags[i - 1].size / 2; + if (rem == 0) + break; + + skb_shinfo(skb)->frags[i - 1].size -= rem; + + skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1]; + get_page(skb_shinfo(skb)->frags[i].page); + skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page; + skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size; + skb_shinfo(skb)->frags[i].size = rem; + i++; + skb_shinfo(skb)->nr_frags = i; + } + } + + /* Stamp the time, and sequence number, convert them to network byte order */ + + if (pgh) { + struct timeval timestamp; + + pgh->pgh_magic = htonl(PKTGEN_MAGIC); + pgh->seq_num = htonl(pkt_dev->seq_num); + + do_gettimeofday(×tamp); + pgh->tv_sec = htonl(timestamp.tv_sec); + pgh->tv_usec = htonl(timestamp.tv_usec); + } + pkt_dev->seq_num++; + + return skb; +} + +/* + * scan_ip6, fmt_ip taken from dietlibc-0.21 + * Author Felix von Leitner <felix-dietlibc@fefe.de> + * + * Slightly modified for kernel. + * Should be candidate for net/ipv4/utils.c + * --ro + */ + +static unsigned int scan_ip6(const char *s,char ip[16]) +{ + unsigned int i; + unsigned int len=0; + unsigned long u; + char suffix[16]; + unsigned int prefixlen=0; + unsigned int suffixlen=0; + __u32 tmp; + + for (i=0; i<16; i++) ip[i]=0; + + for (;;) { + if (*s == ':') { + len++; + if (s[1] == ':') { /* Found "::", skip to part 2 */ + s+=2; + len++; + break; + } + s++; + } + { + char *tmp; + u=simple_strtoul(s,&tmp,16); + i=tmp-s; + } + + if (!i) return 0; + if (prefixlen==12 && s[i]=='.') { + + /* the last 4 bytes may be written as IPv4 address */ + + tmp = in_aton(s); + memcpy((struct in_addr*)(ip+12), &tmp, sizeof(tmp)); + return i+len; + } + ip[prefixlen++] = (u >> 8); + ip[prefixlen++] = (u & 255); + s += i; len += i; + if (prefixlen==16) + return len; + } + +/* part 2, after "::" */ + for (;;) { + if (*s == ':') { + if (suffixlen==0) + break; + s++; + len++; + } else if (suffixlen!=0) + break; + { + char *tmp; + u=simple_strtol(s,&tmp,16); + i=tmp-s; + } + if (!i) { + if (*s) len--; + break; + } + if (suffixlen+prefixlen<=12 && s[i]=='.') { + tmp = in_aton(s); + memcpy((struct in_addr*)(suffix+suffixlen), &tmp, sizeof(tmp)); + suffixlen+=4; + len+=strlen(s); + break; + } + suffix[suffixlen++] = (u >> 8); + suffix[suffixlen++] = (u & 255); + s += i; len += i; + if (prefixlen+suffixlen==16) + break; + } + for (i=0; i<suffixlen; i++) + ip[16-suffixlen+i] = suffix[i]; + return len; +} + +static char tohex(char hexdigit) { + return hexdigit>9?hexdigit+'a'-10:hexdigit+'0'; +} + +static int fmt_xlong(char* s,unsigned int i) { + char* bak=s; + *s=tohex((i>>12)&0xf); if (s!=bak || *s!='0') ++s; + *s=tohex((i>>8)&0xf); if (s!=bak || *s!='0') ++s; + *s=tohex((i>>4)&0xf); if (s!=bak || *s!='0') ++s; + *s=tohex(i&0xf); + return s-bak+1; +} + +static unsigned int fmt_ip6(char *s,const char ip[16]) { + unsigned int len; + unsigned int i; + unsigned int temp; + unsigned int compressing; + int j; + + len = 0; compressing = 0; + for (j=0; j<16; j+=2) { + +#ifdef V4MAPPEDPREFIX + if (j==12 && !memcmp(ip,V4mappedprefix,12)) { + inet_ntoa_r(*(struct in_addr*)(ip+12),s); + temp=strlen(s); + return len+temp; + } +#endif + temp = ((unsigned long) (unsigned char) ip[j] << 8) + + (unsigned long) (unsigned char) ip[j+1]; + if (temp == 0) { + if (!compressing) { + compressing=1; + if (j==0) { + *s++=':'; ++len; + } + } + } else { + if (compressing) { + compressing=0; + *s++=':'; ++len; + } + i = fmt_xlong(s,temp); len += i; s += i; + if (j<14) { + *s++ = ':'; + ++len; + } + } + } + if (compressing) { + *s++=':'; ++len; + } + *s=0; + return len; +} + +static struct sk_buff *fill_packet_ipv6(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + struct sk_buff *skb = NULL; + __u8 *eth; + struct udphdr *udph; + int datalen; + struct ipv6hdr *iph; + struct pktgen_hdr *pgh = NULL; + + skb = alloc_skb(pkt_dev->cur_pkt_size + 64 + 16, GFP_ATOMIC); + if (!skb) { + sprintf(pkt_dev->result, "No memory"); + return NULL; + } + + skb_reserve(skb, 16); + + /* Reserve for ethernet and IP header */ + eth = (__u8 *) skb_push(skb, 14); + iph = (struct ipv6hdr *)skb_put(skb, sizeof(struct ipv6hdr)); + udph = (struct udphdr *)skb_put(skb, sizeof(struct udphdr)); + + + /* Update any of the values, used when we're incrementing various + * fields. + */ + mod_cur_headers(pkt_dev); + + + memcpy(eth, pkt_dev->hh, 12); + *(u16*)ð[12] = __constant_htons(ETH_P_IPV6); + + + datalen = pkt_dev->cur_pkt_size-14- + sizeof(struct ipv6hdr)-sizeof(struct udphdr); /* Eth + IPh + UDPh */ + + if (datalen < sizeof(struct pktgen_hdr)) { + datalen = sizeof(struct pktgen_hdr); + if (net_ratelimit()) + printk(KERN_INFO "pktgen: increased datalen to %d\n", datalen); + } + + udph->source = htons(pkt_dev->cur_udp_src); + udph->dest = htons(pkt_dev->cur_udp_dst); + udph->len = htons(datalen + sizeof(struct udphdr)); + udph->check = 0; /* No checksum */ + + *(u32*)iph = __constant_htonl(0x60000000); /* Version + flow */ + + iph->hop_limit = 32; + + iph->payload_len = htons(sizeof(struct udphdr) + datalen); + iph->nexthdr = IPPROTO_UDP; + + ipv6_addr_copy(&iph->daddr, &pkt_dev->cur_in6_daddr); + ipv6_addr_copy(&iph->saddr, &pkt_dev->cur_in6_saddr); + + skb->mac.raw = ((u8 *)iph) - 14; + skb->protocol = __constant_htons(ETH_P_IPV6); + skb->dev = odev; + skb->pkt_type = PACKET_HOST; + + if (pkt_dev->nfrags <= 0) + pgh = (struct pktgen_hdr *)skb_put(skb, datalen); + else { + int frags = pkt_dev->nfrags; + int i; + + pgh = (struct pktgen_hdr*)(((char*)(udph)) + 8); + + if (frags > MAX_SKB_FRAGS) + frags = MAX_SKB_FRAGS; + if (datalen > frags*PAGE_SIZE) { + skb_put(skb, datalen-frags*PAGE_SIZE); + datalen = frags*PAGE_SIZE; + } + + i = 0; + while (datalen > 0) { + struct page *page = alloc_pages(GFP_KERNEL, 0); + skb_shinfo(skb)->frags[i].page = page; + skb_shinfo(skb)->frags[i].page_offset = 0; + skb_shinfo(skb)->frags[i].size = + (datalen < PAGE_SIZE ? datalen : PAGE_SIZE); + datalen -= skb_shinfo(skb)->frags[i].size; + skb->len += skb_shinfo(skb)->frags[i].size; + skb->data_len += skb_shinfo(skb)->frags[i].size; + i++; + skb_shinfo(skb)->nr_frags = i; + } + + while (i < frags) { + int rem; + + if (i == 0) + break; + + rem = skb_shinfo(skb)->frags[i - 1].size / 2; + if (rem == 0) + break; + + skb_shinfo(skb)->frags[i - 1].size -= rem; + + skb_shinfo(skb)->frags[i] = skb_shinfo(skb)->frags[i - 1]; + get_page(skb_shinfo(skb)->frags[i].page); + skb_shinfo(skb)->frags[i].page = skb_shinfo(skb)->frags[i - 1].page; + skb_shinfo(skb)->frags[i].page_offset += skb_shinfo(skb)->frags[i - 1].size; + skb_shinfo(skb)->frags[i].size = rem; + i++; + skb_shinfo(skb)->nr_frags = i; + } + } + + /* Stamp the time, and sequence number, convert them to network byte order */ + /* should we update cloned packets too ? */ + if (pgh) { + struct timeval timestamp; + + pgh->pgh_magic = htonl(PKTGEN_MAGIC); + pgh->seq_num = htonl(pkt_dev->seq_num); + + do_gettimeofday(×tamp); + pgh->tv_sec = htonl(timestamp.tv_sec); + pgh->tv_usec = htonl(timestamp.tv_usec); + } + pkt_dev->seq_num++; + + return skb; +} + +static inline struct sk_buff *fill_packet(struct net_device *odev, + struct pktgen_dev *pkt_dev) +{ + if(pkt_dev->flags & F_IPV6) + return fill_packet_ipv6(odev, pkt_dev); + else + return fill_packet_ipv4(odev, pkt_dev); +} + +static void pktgen_clear_counters(struct pktgen_dev *pkt_dev) +{ + pkt_dev->seq_num = 1; + pkt_dev->idle_acc = 0; + pkt_dev->sofar = 0; + pkt_dev->tx_bytes = 0; + pkt_dev->errors = 0; +} + +/* Set up structure for sending pkts, clear counters */ + +static void pktgen_run(struct pktgen_thread *t) +{ + struct pktgen_dev *pkt_dev = NULL; + int started = 0; + + PG_DEBUG(printk("pktgen: entering pktgen_run. %p\n", t)); + + if_lock(t); + for (pkt_dev = t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) { + + /* + * setup odev and create initial packet. + */ + pktgen_setup_inject(pkt_dev); + + if(pkt_dev->odev) { + pktgen_clear_counters(pkt_dev); + pkt_dev->running = 1; /* Cranke yeself! */ + pkt_dev->skb = NULL; + pkt_dev->started_at = getCurUs(); + pkt_dev->next_tx_us = getCurUs(); /* Transmit immediately */ + pkt_dev->next_tx_ns = 0; + + strcpy(pkt_dev->result, "Starting"); + started++; + } + else + strcpy(pkt_dev->result, "Error starting"); + } + if_unlock(t); + if(started) t->control &= ~(T_STOP); +} + +static void pktgen_stop_all_threads_ifs(void) +{ + struct pktgen_thread *t = pktgen_threads; + + PG_DEBUG(printk("pktgen: entering pktgen_stop_all_threads.\n")); + + thread_lock(); + while(t) { + pktgen_stop(t); + t = t->next; + } + thread_unlock(); +} + +static int thread_is_running(struct pktgen_thread *t ) +{ + struct pktgen_dev *next; + int res = 0; + + for(next=t->if_list; next; next=next->next) { + if(next->running) { + res = 1; + break; + } + } + return res; +} + +static int pktgen_wait_thread_run(struct pktgen_thread *t ) +{ + if_lock(t); + + while(thread_is_running(t)) { + + if_unlock(t); + + msleep_interruptible(100); + + if (signal_pending(current)) + goto signal; + if_lock(t); + } + if_unlock(t); + return 1; + signal: + return 0; +} + +static int pktgen_wait_all_threads_run(void) +{ + struct pktgen_thread *t = pktgen_threads; + int sig = 1; + + while (t) { + sig = pktgen_wait_thread_run(t); + if( sig == 0 ) break; + thread_lock(); + t=t->next; + thread_unlock(); + } + if(sig == 0) { + thread_lock(); + while (t) { + t->control |= (T_STOP); + t=t->next; + } + thread_unlock(); + } + return sig; +} + +static void pktgen_run_all_threads(void) +{ + struct pktgen_thread *t = pktgen_threads; + + PG_DEBUG(printk("pktgen: entering pktgen_run_all_threads.\n")); + + thread_lock(); + + while(t) { + t->control |= (T_RUN); + t = t->next; + } + thread_unlock(); + + current->state = TASK_INTERRUPTIBLE; + schedule_timeout(HZ/8); /* Propagate thread->control */ + + pktgen_wait_all_threads_run(); +} + + +static void show_results(struct pktgen_dev *pkt_dev, int nr_frags) +{ + __u64 total_us, bps, mbps, pps, idle; + char *p = pkt_dev->result; + + total_us = pkt_dev->stopped_at - pkt_dev->started_at; + + idle = pkt_dev->idle_acc; + + p += sprintf(p, "OK: %llu(c%llu+d%llu) usec, %llu (%dbyte,%dfrags)\n", + (unsigned long long) total_us, + (unsigned long long)(total_us - idle), + (unsigned long long) idle, + (unsigned long long) pkt_dev->sofar, + pkt_dev->cur_pkt_size, nr_frags); + + pps = pkt_dev->sofar * USEC_PER_SEC; + + while ((total_us >> 32) != 0) { + pps >>= 1; + total_us >>= 1; + } + + do_div(pps, total_us); + + bps = pps * 8 * pkt_dev->cur_pkt_size; + + mbps = bps; + do_div(mbps, 1000000); + p += sprintf(p, " %llupps %lluMb/sec (%llubps) errors: %llu", + (unsigned long long) pps, + (unsigned long long) mbps, + (unsigned long long) bps, + (unsigned long long) pkt_dev->errors); +} + + +/* Set stopped-at timer, remove from running list, do counters & statistics */ + +static int pktgen_stop_device(struct pktgen_dev *pkt_dev) +{ + + if (!pkt_dev->running) { + printk("pktgen: interface: %s is already stopped\n", pkt_dev->ifname); + return -EINVAL; + } + + pkt_dev->stopped_at = getCurUs(); + pkt_dev->running = 0; + + show_results(pkt_dev, skb_shinfo(pkt_dev->skb)->nr_frags); + + if (pkt_dev->skb) + kfree_skb(pkt_dev->skb); + + pkt_dev->skb = NULL; + + return 0; +} + +static struct pktgen_dev *next_to_run(struct pktgen_thread *t ) +{ + struct pktgen_dev *next, *best = NULL; + + if_lock(t); + + for(next=t->if_list; next ; next=next->next) { + if(!next->running) continue; + if(best == NULL) best=next; + else if ( next->next_tx_us < best->next_tx_us) + best = next; + } + if_unlock(t); + return best; +} + +static void pktgen_stop(struct pktgen_thread *t) { + struct pktgen_dev *next = NULL; + + PG_DEBUG(printk("pktgen: entering pktgen_stop.\n")); + + if_lock(t); + + for(next=t->if_list; next; next=next->next) + pktgen_stop_device(next); + + if_unlock(t); +} + +static void pktgen_rem_all_ifs(struct pktgen_thread *t) +{ + struct pktgen_dev *cur, *next = NULL; + + /* Remove all devices, free mem */ + + if_lock(t); + + for(cur=t->if_list; cur; cur=next) { + next = cur->next; + pktgen_remove_device(t, cur); + } + + if_unlock(t); +} + +static void pktgen_rem_thread(struct pktgen_thread *t) +{ + /* Remove from the thread list */ + + struct pktgen_thread *tmp = pktgen_threads; + + if (strlen(t->fname)) + remove_proc_entry(t->fname, NULL); + + thread_lock(); + + if (tmp == t) + pktgen_threads = tmp->next; + else { + while (tmp) { + if (tmp->next == t) { + tmp->next = t->next; + t->next = NULL; + break; + } + tmp = tmp->next; + } + } + thread_unlock(); +} + +static __inline__ void pktgen_xmit(struct pktgen_dev *pkt_dev) +{ + struct net_device *odev = NULL; + __u64 idle_start = 0; + int ret; + + odev = pkt_dev->odev; + + if (pkt_dev->delay_us || pkt_dev->delay_ns) { + u64 now; + + now = getCurUs(); + if (now < pkt_dev->next_tx_us) + spin(pkt_dev, pkt_dev->next_tx_us); + + /* This is max DELAY, this has special meaning of + * "never transmit" + */ + if (pkt_dev->delay_us == 0x7FFFFFFF) { + pkt_dev->next_tx_us = getCurUs() + pkt_dev->delay_us; + pkt_dev->next_tx_ns = pkt_dev->delay_ns; + goto out; + } + } + + if (netif_queue_stopped(odev) || need_resched()) { + idle_start = getCurUs(); + + if (!netif_running(odev)) { + pktgen_stop_device(pkt_dev); + goto out; + } + if (need_resched()) + schedule(); + + pkt_dev->idle_acc += getCurUs() - idle_start; + + if (netif_queue_stopped(odev)) { + pkt_dev->next_tx_us = getCurUs(); /* TODO */ + pkt_dev->next_tx_ns = 0; + goto out; /* Try the next interface */ + } + } + + if (pkt_dev->last_ok || !pkt_dev->skb) { + if ((++pkt_dev->clone_count >= pkt_dev->clone_skb ) || (!pkt_dev->skb)) { + /* build a new pkt */ + if (pkt_dev->skb) + kfree_skb(pkt_dev->skb); + + pkt_dev->skb = fill_packet(odev, pkt_dev); + if (pkt_dev->skb == NULL) { + printk("pktgen: ERROR: couldn't allocate skb in fill_packet.\n"); + schedule(); + pkt_dev->clone_count--; /* back out increment, OOM */ + goto out; + } + pkt_dev->allocated_skbs++; + pkt_dev->clone_count = 0; /* reset counter */ + } + } + + spin_lock_bh(&odev->xmit_lock); + if (!netif_queue_stopped(odev)) { + + atomic_inc(&(pkt_dev->skb->users)); +retry_now: + ret = odev->hard_start_xmit(pkt_dev->skb, odev); + if (likely(ret == NETDEV_TX_OK)) { + pkt_dev->last_ok = 1; + pkt_dev->sofar++; + pkt_dev->seq_num++; + pkt_dev->tx_bytes += pkt_dev->cur_pkt_size; + + } else if (ret == NETDEV_TX_LOCKED + && (odev->features & NETIF_F_LLTX)) { + cpu_relax(); + goto retry_now; + } else { /* Retry it next time */ + + atomic_dec(&(pkt_dev->skb->users)); + + if (debug && net_ratelimit()) + printk(KERN_INFO "pktgen: Hard xmit error\n"); + + pkt_dev->errors++; + pkt_dev->last_ok = 0; + } + + pkt_dev->next_tx_us = getCurUs(); + pkt_dev->next_tx_ns = 0; + + pkt_dev->next_tx_us += pkt_dev->delay_us; + pkt_dev->next_tx_ns += pkt_dev->delay_ns; + + if (pkt_dev->next_tx_ns > 1000) { + pkt_dev->next_tx_us++; + pkt_dev->next_tx_ns -= 1000; + } + } + + else { /* Retry it next time */ + pkt_dev->last_ok = 0; + pkt_dev->next_tx_us = getCurUs(); /* TODO */ + pkt_dev->next_tx_ns = 0; + } + + spin_unlock_bh(&odev->xmit_lock); + + /* If pkt_dev->count is zero, then run forever */ + if ((pkt_dev->count != 0) && (pkt_dev->sofar >= pkt_dev->count)) { + if (atomic_read(&(pkt_dev->skb->users)) != 1) { + idle_start = getCurUs(); + while (atomic_read(&(pkt_dev->skb->users)) != 1) { + if (signal_pending(current)) { + break; + } + schedule(); + } + pkt_dev->idle_acc += getCurUs() - idle_start; + } + + /* Done with this */ + pktgen_stop_device(pkt_dev); + } + out:; + } + +/* + * Main loop of the thread goes here + */ + +static void pktgen_thread_worker(struct pktgen_thread *t) +{ + DEFINE_WAIT(wait); + struct pktgen_dev *pkt_dev = NULL; + int cpu = t->cpu; + sigset_t tmpsig; + u32 max_before_softirq; + u32 tx_since_softirq = 0; + + daemonize("pktgen/%d", cpu); + + /* Block all signals except SIGKILL, SIGSTOP and SIGTERM */ + + spin_lock_irq(¤t->sighand->siglock); + tmpsig = current->blocked; + siginitsetinv(¤t->blocked, + sigmask(SIGKILL) | + sigmask(SIGSTOP)| + sigmask(SIGTERM)); + + recalc_sigpending(); + spin_unlock_irq(¤t->sighand->siglock); + + /* Migrate to the right CPU */ + set_cpus_allowed(current, cpumask_of_cpu(cpu)); + if (smp_processor_id() != cpu) + BUG(); + + init_waitqueue_head(&t->queue); + + t->control &= ~(T_TERMINATE); + t->control &= ~(T_RUN); + t->control &= ~(T_STOP); + t->control &= ~(T_REMDEV); + + t->pid = current->pid; + + PG_DEBUG(printk("pktgen: starting pktgen/%d: pid=%d\n", cpu, current->pid)); + + max_before_softirq = t->max_before_softirq; + + __set_current_state(TASK_INTERRUPTIBLE); + mb(); + + while (1) { + + __set_current_state(TASK_RUNNING); + + /* + * Get next dev to xmit -- if any. + */ + + pkt_dev = next_to_run(t); + + if (pkt_dev) { + + pktgen_xmit(pkt_dev); + + /* + * We like to stay RUNNING but must also give + * others fair share. + */ + + tx_since_softirq += pkt_dev->last_ok; + + if (tx_since_softirq > max_before_softirq) { + if (local_softirq_pending()) + do_softirq(); + tx_since_softirq = 0; + } + } else { + prepare_to_wait(&(t->queue), &wait, TASK_INTERRUPTIBLE); + schedule_timeout(HZ/10); + finish_wait(&(t->queue), &wait); + } + + /* + * Back from sleep, either due to the timeout or signal. + * We check if we have any "posted" work for us. + */ + + if (t->control & T_TERMINATE || signal_pending(current)) + /* we received a request to terminate ourself */ + break; + + + if(t->control & T_STOP) { + pktgen_stop(t); + t->control &= ~(T_STOP); + } + + if(t->control & T_RUN) { + pktgen_run(t); + t->control &= ~(T_RUN); + } + + if(t->control & T_REMDEV) { + pktgen_rem_all_ifs(t); + t->control &= ~(T_REMDEV); + } + + if (need_resched()) + schedule(); + } + + PG_DEBUG(printk("pktgen: %s stopping all device\n", t->name)); + pktgen_stop(t); + + PG_DEBUG(printk("pktgen: %s removing all device\n", t->name)); + pktgen_rem_all_ifs(t); + + PG_DEBUG(printk("pktgen: %s removing thread.\n", t->name)); + pktgen_rem_thread(t); +} + +static struct pktgen_dev *pktgen_find_dev(struct pktgen_thread *t, const char* ifname) +{ + struct pktgen_dev *pkt_dev = NULL; + if_lock(t); + + for(pkt_dev=t->if_list; pkt_dev; pkt_dev = pkt_dev->next ) { + if (strcmp(pkt_dev->ifname, ifname) == 0) { + break; + } + } + + if_unlock(t); + PG_DEBUG(printk("pktgen: find_dev(%s) returning %p\n", ifname,pkt_dev)); + return pkt_dev; +} + +/* + * Adds a dev at front of if_list. + */ + +static int add_dev_to_thread(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) +{ + int rv = 0; + + if_lock(t); + + if (pkt_dev->pg_thread) { + printk("pktgen: ERROR: already assigned to a thread.\n"); + rv = -EBUSY; + goto out; + } + pkt_dev->next =t->if_list; t->if_list=pkt_dev; + pkt_dev->pg_thread = t; + pkt_dev->running = 0; + + out: + if_unlock(t); + return rv; +} + +/* Called under thread lock */ + +static int pktgen_add_device(struct pktgen_thread *t, const char* ifname) +{ + struct pktgen_dev *pkt_dev; + + /* We don't allow a device to be on several threads */ + + if( (pkt_dev = __pktgen_NN_threads(ifname, FIND)) == NULL) { + + pkt_dev = kmalloc(sizeof(struct pktgen_dev), GFP_KERNEL); + if (!pkt_dev) + return -ENOMEM; + + memset(pkt_dev, 0, sizeof(struct pktgen_dev)); + + pkt_dev->flows = vmalloc(MAX_CFLOWS*sizeof(struct flow_state)); + if (pkt_dev->flows == NULL) { + kfree(pkt_dev); + return -ENOMEM; + } + memset(pkt_dev->flows, 0, MAX_CFLOWS*sizeof(struct flow_state)); + + pkt_dev->min_pkt_size = ETH_ZLEN; + pkt_dev->max_pkt_size = ETH_ZLEN; + pkt_dev->nfrags = 0; + pkt_dev->clone_skb = pg_clone_skb_d; + pkt_dev->delay_us = pg_delay_d / 1000; + pkt_dev->delay_ns = pg_delay_d % 1000; + pkt_dev->count = pg_count_d; + pkt_dev->sofar = 0; + pkt_dev->udp_src_min = 9; /* sink port */ + pkt_dev->udp_src_max = 9; + pkt_dev->udp_dst_min = 9; + pkt_dev->udp_dst_max = 9; + + strncpy(pkt_dev->ifname, ifname, 31); + sprintf(pkt_dev->fname, "net/%s/%s", PG_PROC_DIR, ifname); + + if (! pktgen_setup_dev(pkt_dev)) { + printk("pktgen: ERROR: pktgen_setup_dev failed.\n"); + if (pkt_dev->flows) + vfree(pkt_dev->flows); + kfree(pkt_dev); + return -ENODEV; + } + + pkt_dev->proc_ent = create_proc_entry(pkt_dev->fname, 0600, NULL); + if (!pkt_dev->proc_ent) { + printk("pktgen: cannot create %s procfs entry.\n", pkt_dev->fname); + if (pkt_dev->flows) + vfree(pkt_dev->flows); + kfree(pkt_dev); + return -EINVAL; + } + pkt_dev->proc_ent->read_proc = proc_if_read; + pkt_dev->proc_ent->write_proc = proc_if_write; + pkt_dev->proc_ent->data = (void*)(pkt_dev); + pkt_dev->proc_ent->owner = THIS_MODULE; + + return add_dev_to_thread(t, pkt_dev); + } + else { + printk("pktgen: ERROR: interface already used.\n"); + return -EBUSY; + } +} + +static struct pktgen_thread *pktgen_find_thread(const char* name) +{ + struct pktgen_thread *t = NULL; + + thread_lock(); + + t = pktgen_threads; + while (t) { + if (strcmp(t->name, name) == 0) + break; + + t = t->next; + } + thread_unlock(); + return t; +} + +static int pktgen_create_thread(const char* name, int cpu) +{ + struct pktgen_thread *t = NULL; + + if (strlen(name) > 31) { + printk("pktgen: ERROR: Thread name cannot be more than 31 characters.\n"); + return -EINVAL; + } + + if (pktgen_find_thread(name)) { + printk("pktgen: ERROR: thread: %s already exists\n", name); + return -EINVAL; + } + + t = (struct pktgen_thread*)(kmalloc(sizeof(struct pktgen_thread), GFP_KERNEL)); + if (!t) { + printk("pktgen: ERROR: out of memory, can't create new thread.\n"); + return -ENOMEM; + } + + memset(t, 0, sizeof(struct pktgen_thread)); + strcpy(t->name, name); + spin_lock_init(&t->if_lock); + t->cpu = cpu; + + sprintf(t->fname, "net/%s/%s", PG_PROC_DIR, t->name); + t->proc_ent = create_proc_entry(t->fname, 0600, NULL); + if (!t->proc_ent) { + printk("pktgen: cannot create %s procfs entry.\n", t->fname); + kfree(t); + return -EINVAL; + } + t->proc_ent->read_proc = proc_thread_read; + t->proc_ent->write_proc = proc_thread_write; + t->proc_ent->data = (void*)(t); + t->proc_ent->owner = THIS_MODULE; + + t->next = pktgen_threads; + pktgen_threads = t; + + if (kernel_thread((void *) pktgen_thread_worker, (void *) t, + CLONE_FS | CLONE_FILES | CLONE_SIGHAND) < 0) + printk("pktgen: kernel_thread() failed for cpu %d\n", t->cpu); + + return 0; +} + +/* + * Removes a device from the thread if_list. + */ +static void _rem_dev_from_if_list(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) +{ + struct pktgen_dev *i, *prev = NULL; + + i = t->if_list; + + while(i) { + if(i == pkt_dev) { + if(prev) prev->next = i->next; + else t->if_list = NULL; + break; + } + prev = i; + i=i->next; + } +} + +static int pktgen_remove_device(struct pktgen_thread *t, struct pktgen_dev *pkt_dev) +{ + + PG_DEBUG(printk("pktgen: remove_device pkt_dev=%p\n", pkt_dev)); + + if (pkt_dev->running) { + printk("pktgen:WARNING: trying to remove a running interface, stopping it now.\n"); + pktgen_stop_device(pkt_dev); + } + + /* Dis-associate from the interface */ + + if (pkt_dev->odev) { + dev_put(pkt_dev->odev); + pkt_dev->odev = NULL; + } + + /* And update the thread if_list */ + + _rem_dev_from_if_list(t, pkt_dev); + + /* Clean up proc file system */ + + if (strlen(pkt_dev->fname)) + remove_proc_entry(pkt_dev->fname, NULL); + + if (pkt_dev->flows) + vfree(pkt_dev->flows); + kfree(pkt_dev); + return 0; +} + +static int __init pg_init(void) +{ + int cpu; + printk(version); + + module_fname[0] = 0; + + create_proc_dir(); + + sprintf(module_fname, "net/%s/pgctrl", PG_PROC_DIR); + module_proc_ent = create_proc_entry(module_fname, 0600, NULL); + if (!module_proc_ent) { + printk("pktgen: ERROR: cannot create %s procfs entry.\n", module_fname); + return -EINVAL; + } + + module_proc_ent->proc_fops = &pktgen_fops; + module_proc_ent->data = NULL; + + /* Register us to receive netdevice events */ + register_netdevice_notifier(&pktgen_notifier_block); + + for (cpu = 0; cpu < NR_CPUS ; cpu++) { + char buf[30]; + + if (!cpu_online(cpu)) + continue; + + sprintf(buf, "kpktgend_%i", cpu); + pktgen_create_thread(buf, cpu); + } + return 0; +} + +static void __exit pg_cleanup(void) +{ + wait_queue_head_t queue; + init_waitqueue_head(&queue); + + /* Stop all interfaces & threads */ + + while (pktgen_threads) { + struct pktgen_thread *t = pktgen_threads; + pktgen_threads->control |= (T_TERMINATE); + + wait_event_interruptible_timeout(queue, (t != pktgen_threads), HZ); + } + + /* Un-register us from receiving netdevice events */ + unregister_netdevice_notifier(&pktgen_notifier_block); + + /* Clean up proc file system */ + + remove_proc_entry(module_fname, NULL); + + remove_proc_dir(); +} + + +module_init(pg_init); +module_exit(pg_cleanup); + +MODULE_AUTHOR("Robert Olsson <robert.olsson@its.uu.se"); +MODULE_DESCRIPTION("Packet Generator tool"); +MODULE_LICENSE("GPL"); +module_param(pg_count_d, int, 0); +module_param(pg_delay_d, int, 0); +module_param(pg_clone_skb_d, int, 0); +module_param(debug, int, 0); |
