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authorLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 10:01:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-24 10:01:50 -0700
commit3c4cfadef6a1665d9cd02a543782d03d3e6740c6 (patch)
tree3df72faaacd494d5ac8c9668df4f529b1b5e4457 /net/bluetooth/hci_conn.c
parente017507f37d5cb8b541df165a824958bc333bec3 (diff)
parent320f5ea0cedc08ef65d67e056bcb9d181386ef2c (diff)
downloadop-kernel-dev-3c4cfadef6a1665d9cd02a543782d03d3e6740c6.zip
op-kernel-dev-3c4cfadef6a1665d9cd02a543782d03d3e6740c6.tar.gz
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking changes from David S Miller: 1) Remove the ipv4 routing cache. Now lookups go directly into the FIB trie and use prebuilt routes cached there. No more garbage collection, no more rDOS attacks on the routing cache. Instead we now get predictable and consistent performance, no matter what the pattern of traffic we service. This has been almost 2 years in the making. Special thanks to Julian Anastasov, Eric Dumazet, Steffen Klassert, and others who have helped along the way. I'm sure that with a change of this magnitude there will be some kind of fallout, but such things ought the be simple to fix at this point. Luckily I'm not European so I'll be around all of August to fix things :-) The major stages of this work here are each fronted by a forced merge commit whose commit message contains a top-level description of the motivations and implementation issues. 2) Pre-demux of established ipv4 TCP sockets, saves a route demux on input. 3) TCP SYN/ACK performance tweaks from Eric Dumazet. 4) Add namespace support for netfilter L4 conntrack helpers, from Gao Feng. 5) Add config mechanism for Energy Efficient Ethernet to ethtool, from Yuval Mintz. 6) Remove quadratic behavior from /proc/net/unix, from Eric Dumazet. 7) Support for connection tracker helpers in userspace, from Pablo Neira Ayuso. 8) Allow userspace driven TX load balancing functions in TEAM driver, from Jiri Pirko. 9) Kill off NLMSG_PUT and RTA_PUT macros, more gross stuff with embedded gotos. 10) TCP Small Queues, essentially minimize the amount of TCP data queued up in the packet scheduler layer. Whereas the existing BQL (Byte Queue Limits) limits the pkt_sched --> netdevice queuing levels, this controls the TCP --> pkt_sched queueing levels. From Eric Dumazet. 11) Reduce the number of get_page/put_page ops done on SKB fragments, from Alexander Duyck. 12) Implement protection against blind resets in TCP (RFC 5961), from Eric Dumazet. 13) Support the client side of TCP Fast Open, basically the ability to send data in the SYN exchange, from Yuchung Cheng. Basically, the sender queues up data with a sendmsg() call using MSG_FASTOPEN, then they do the connect() which emits the queued up fastopen data. 14) Avoid all the problems we get into in TCP when timers or PMTU events hit a locked socket. The TCP Small Queues changes added a tcp_release_cb() that allows us to queue work up to the release_sock() caller, and that's what we use here too. From Eric Dumazet. 15) Zero copy on TX support for TUN driver, from Michael S. Tsirkin. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1870 commits) genetlink: define lockdep_genl_is_held() when CONFIG_LOCKDEP r8169: revert "add byte queue limit support". ipv4: Change rt->rt_iif encoding. net: Make skb->skb_iif always track skb->dev ipv4: Prepare for change of rt->rt_iif encoding. ipv4: Remove all RTCF_DIRECTSRC handliing. ipv4: Really ignore ICMP address requests/replies. decnet: Don't set RTCF_DIRECTSRC. net/ipv4/ip_vti.c: Fix __rcu warnings detected by sparse. ipv4: Remove redundant assignment rds: set correct msg_namelen openvswitch: potential NULL deref in sample() tcp: dont drop MTU reduction indications bnx2x: Add new 57840 device IDs tcp: avoid oops in tcp_metrics and reset tcpm_stamp niu: Change niu_rbr_fill() to use unlikely() to check niu_rbr_add_page() return value niu: Fix to check for dma mapping errors. net: Fix references to out-of-scope variables in put_cmsg_compat() net: ethernet: davinci_emac: add pm_runtime support net: ethernet: davinci_emac: Remove unnecessary #include ...
Diffstat (limited to 'net/bluetooth/hci_conn.c')
-rw-r--r--net/bluetooth/hci_conn.c143
1 files changed, 66 insertions, 77 deletions
diff --git a/net/bluetooth/hci_conn.c b/net/bluetooth/hci_conn.c
index 3f18a6e..5ad7da2 100644
--- a/net/bluetooth/hci_conn.c
+++ b/net/bluetooth/hci_conn.c
@@ -24,24 +24,11 @@
/* Bluetooth HCI connection handling. */
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/poll.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/skbuff.h>
-#include <linux/interrupt.h>
-#include <net/sock.h>
-
-#include <linux/uaccess.h>
-#include <asm/unaligned.h>
+#include <linux/export.h>
#include <net/bluetooth/bluetooth.h>
#include <net/bluetooth/hci_core.h>
+#include <net/bluetooth/a2mp.h>
static void hci_le_connect(struct hci_conn *conn)
{
@@ -54,15 +41,15 @@ static void hci_le_connect(struct hci_conn *conn)
conn->sec_level = BT_SECURITY_LOW;
memset(&cp, 0, sizeof(cp));
- cp.scan_interval = cpu_to_le16(0x0060);
- cp.scan_window = cpu_to_le16(0x0030);
+ cp.scan_interval = __constant_cpu_to_le16(0x0060);
+ cp.scan_window = __constant_cpu_to_le16(0x0030);
bacpy(&cp.peer_addr, &conn->dst);
cp.peer_addr_type = conn->dst_type;
- cp.conn_interval_min = cpu_to_le16(0x0028);
- cp.conn_interval_max = cpu_to_le16(0x0038);
- cp.supervision_timeout = cpu_to_le16(0x002a);
- cp.min_ce_len = cpu_to_le16(0x0000);
- cp.max_ce_len = cpu_to_le16(0x0000);
+ cp.conn_interval_min = __constant_cpu_to_le16(0x0028);
+ cp.conn_interval_max = __constant_cpu_to_le16(0x0038);
+ cp.supervision_timeout = __constant_cpu_to_le16(0x002a);
+ cp.min_ce_len = __constant_cpu_to_le16(0x0000);
+ cp.max_ce_len = __constant_cpu_to_le16(0x0000);
hci_send_cmd(hdev, HCI_OP_LE_CREATE_CONN, sizeof(cp), &cp);
}
@@ -99,7 +86,7 @@ void hci_acl_connect(struct hci_conn *conn)
cp.pscan_rep_mode = ie->data.pscan_rep_mode;
cp.pscan_mode = ie->data.pscan_mode;
cp.clock_offset = ie->data.clock_offset |
- cpu_to_le16(0x8000);
+ __constant_cpu_to_le16(0x8000);
}
memcpy(conn->dev_class, ie->data.dev_class, 3);
@@ -120,7 +107,7 @@ static void hci_acl_connect_cancel(struct hci_conn *conn)
{
struct hci_cp_create_conn_cancel cp;
- BT_DBG("%p", conn);
+ BT_DBG("hcon %p", conn);
if (conn->hdev->hci_ver < BLUETOOTH_VER_1_2)
return;
@@ -133,7 +120,7 @@ void hci_acl_disconn(struct hci_conn *conn, __u8 reason)
{
struct hci_cp_disconnect cp;
- BT_DBG("%p", conn);
+ BT_DBG("hcon %p", conn);
conn->state = BT_DISCONN;
@@ -147,7 +134,7 @@ void hci_add_sco(struct hci_conn *conn, __u16 handle)
struct hci_dev *hdev = conn->hdev;
struct hci_cp_add_sco cp;
- BT_DBG("%p", conn);
+ BT_DBG("hcon %p", conn);
conn->state = BT_CONNECT;
conn->out = true;
@@ -165,7 +152,7 @@ void hci_setup_sync(struct hci_conn *conn, __u16 handle)
struct hci_dev *hdev = conn->hdev;
struct hci_cp_setup_sync_conn cp;
- BT_DBG("%p", conn);
+ BT_DBG("hcon %p", conn);
conn->state = BT_CONNECT;
conn->out = true;
@@ -175,9 +162,9 @@ void hci_setup_sync(struct hci_conn *conn, __u16 handle)
cp.handle = cpu_to_le16(handle);
cp.pkt_type = cpu_to_le16(conn->pkt_type);
- cp.tx_bandwidth = cpu_to_le32(0x00001f40);
- cp.rx_bandwidth = cpu_to_le32(0x00001f40);
- cp.max_latency = cpu_to_le16(0xffff);
+ cp.tx_bandwidth = __constant_cpu_to_le32(0x00001f40);
+ cp.rx_bandwidth = __constant_cpu_to_le32(0x00001f40);
+ cp.max_latency = __constant_cpu_to_le16(0xffff);
cp.voice_setting = cpu_to_le16(hdev->voice_setting);
cp.retrans_effort = 0xff;
@@ -185,7 +172,7 @@ void hci_setup_sync(struct hci_conn *conn, __u16 handle)
}
void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
- u16 latency, u16 to_multiplier)
+ u16 latency, u16 to_multiplier)
{
struct hci_cp_le_conn_update cp;
struct hci_dev *hdev = conn->hdev;
@@ -197,20 +184,19 @@ void hci_le_conn_update(struct hci_conn *conn, u16 min, u16 max,
cp.conn_interval_max = cpu_to_le16(max);
cp.conn_latency = cpu_to_le16(latency);
cp.supervision_timeout = cpu_to_le16(to_multiplier);
- cp.min_ce_len = cpu_to_le16(0x0001);
- cp.max_ce_len = cpu_to_le16(0x0001);
+ cp.min_ce_len = __constant_cpu_to_le16(0x0001);
+ cp.max_ce_len = __constant_cpu_to_le16(0x0001);
hci_send_cmd(hdev, HCI_OP_LE_CONN_UPDATE, sizeof(cp), &cp);
}
-EXPORT_SYMBOL(hci_le_conn_update);
void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
- __u8 ltk[16])
+ __u8 ltk[16])
{
struct hci_dev *hdev = conn->hdev;
struct hci_cp_le_start_enc cp;
- BT_DBG("%p", conn);
+ BT_DBG("hcon %p", conn);
memset(&cp, 0, sizeof(cp));
@@ -221,18 +207,17 @@ void hci_le_start_enc(struct hci_conn *conn, __le16 ediv, __u8 rand[8],
hci_send_cmd(hdev, HCI_OP_LE_START_ENC, sizeof(cp), &cp);
}
-EXPORT_SYMBOL(hci_le_start_enc);
/* Device _must_ be locked */
void hci_sco_setup(struct hci_conn *conn, __u8 status)
{
struct hci_conn *sco = conn->link;
- BT_DBG("%p", conn);
-
if (!sco)
return;
+ BT_DBG("hcon %p", conn);
+
if (!status) {
if (lmp_esco_capable(conn->hdev))
hci_setup_sync(sco, conn->handle);
@@ -247,10 +232,10 @@ void hci_sco_setup(struct hci_conn *conn, __u8 status)
static void hci_conn_timeout(struct work_struct *work)
{
struct hci_conn *conn = container_of(work, struct hci_conn,
- disc_work.work);
+ disc_work.work);
__u8 reason;
- BT_DBG("conn %p state %s", conn, state_to_string(conn->state));
+ BT_DBG("hcon %p state %s", conn, state_to_string(conn->state));
if (atomic_read(&conn->refcnt))
return;
@@ -281,7 +266,7 @@ static void hci_conn_enter_sniff_mode(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
- BT_DBG("conn %p mode %d", conn, conn->mode);
+ BT_DBG("hcon %p mode %d", conn, conn->mode);
if (test_bit(HCI_RAW, &hdev->flags))
return;
@@ -295,9 +280,9 @@ static void hci_conn_enter_sniff_mode(struct hci_conn *conn)
if (lmp_sniffsubr_capable(hdev) && lmp_sniffsubr_capable(conn)) {
struct hci_cp_sniff_subrate cp;
cp.handle = cpu_to_le16(conn->handle);
- cp.max_latency = cpu_to_le16(0);
- cp.min_remote_timeout = cpu_to_le16(0);
- cp.min_local_timeout = cpu_to_le16(0);
+ cp.max_latency = __constant_cpu_to_le16(0);
+ cp.min_remote_timeout = __constant_cpu_to_le16(0);
+ cp.min_local_timeout = __constant_cpu_to_le16(0);
hci_send_cmd(hdev, HCI_OP_SNIFF_SUBRATE, sizeof(cp), &cp);
}
@@ -306,8 +291,8 @@ static void hci_conn_enter_sniff_mode(struct hci_conn *conn)
cp.handle = cpu_to_le16(conn->handle);
cp.max_interval = cpu_to_le16(hdev->sniff_max_interval);
cp.min_interval = cpu_to_le16(hdev->sniff_min_interval);
- cp.attempt = cpu_to_le16(4);
- cp.timeout = cpu_to_le16(1);
+ cp.attempt = __constant_cpu_to_le16(4);
+ cp.timeout = __constant_cpu_to_le16(1);
hci_send_cmd(hdev, HCI_OP_SNIFF_MODE, sizeof(cp), &cp);
}
}
@@ -316,7 +301,7 @@ static void hci_conn_idle(unsigned long arg)
{
struct hci_conn *conn = (void *) arg;
- BT_DBG("conn %p mode %d", conn, conn->mode);
+ BT_DBG("hcon %p mode %d", conn, conn->mode);
hci_conn_enter_sniff_mode(conn);
}
@@ -327,7 +312,7 @@ static void hci_conn_auto_accept(unsigned long arg)
struct hci_dev *hdev = conn->hdev;
hci_send_cmd(hdev, HCI_OP_USER_CONFIRM_REPLY, sizeof(conn->dst),
- &conn->dst);
+ &conn->dst);
}
struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
@@ -376,7 +361,7 @@ struct hci_conn *hci_conn_add(struct hci_dev *hdev, int type, bdaddr_t *dst)
INIT_DELAYED_WORK(&conn->disc_work, hci_conn_timeout);
setup_timer(&conn->idle_timer, hci_conn_idle, (unsigned long)conn);
setup_timer(&conn->auto_accept_timer, hci_conn_auto_accept,
- (unsigned long) conn);
+ (unsigned long) conn);
atomic_set(&conn->refcnt, 0);
@@ -397,7 +382,7 @@ int hci_conn_del(struct hci_conn *conn)
{
struct hci_dev *hdev = conn->hdev;
- BT_DBG("%s conn %p handle %d", hdev->name, conn, conn->handle);
+ BT_DBG("%s hcon %p handle %d", hdev->name, conn, conn->handle);
del_timer(&conn->idle_timer);
@@ -425,9 +410,11 @@ int hci_conn_del(struct hci_conn *conn)
}
}
-
hci_chan_list_flush(conn);
+ if (conn->amp_mgr)
+ amp_mgr_put(conn->amp_mgr);
+
hci_conn_hash_del(hdev, conn);
if (hdev->notify)
hdev->notify(hdev, HCI_NOTIFY_CONN_DEL);
@@ -454,7 +441,9 @@ struct hci_dev *hci_get_route(bdaddr_t *dst, bdaddr_t *src)
read_lock(&hci_dev_list_lock);
list_for_each_entry(d, &hci_dev_list, list) {
- if (!test_bit(HCI_UP, &d->flags) || test_bit(HCI_RAW, &d->flags))
+ if (!test_bit(HCI_UP, &d->flags) ||
+ test_bit(HCI_RAW, &d->flags) ||
+ d->dev_type != HCI_BREDR)
continue;
/* Simple routing:
@@ -495,6 +484,11 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
if (type == LE_LINK) {
le = hci_conn_hash_lookup_ba(hdev, LE_LINK, dst);
if (!le) {
+ le = hci_conn_hash_lookup_state(hdev, LE_LINK,
+ BT_CONNECT);
+ if (le)
+ return ERR_PTR(-EBUSY);
+
le = hci_conn_add(hdev, LE_LINK, dst);
if (!le)
return ERR_PTR(-ENOMEM);
@@ -545,7 +539,7 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
hci_conn_hold(sco);
if (acl->state == BT_CONNECTED &&
- (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
+ (sco->state == BT_OPEN || sco->state == BT_CLOSED)) {
set_bit(HCI_CONN_POWER_SAVE, &acl->flags);
hci_conn_enter_active_mode(acl, BT_POWER_FORCE_ACTIVE_ON);
@@ -560,24 +554,22 @@ struct hci_conn *hci_connect(struct hci_dev *hdev, int type, bdaddr_t *dst,
return sco;
}
-EXPORT_SYMBOL(hci_connect);
/* Check link security requirement */
int hci_conn_check_link_mode(struct hci_conn *conn)
{
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
if (hci_conn_ssp_enabled(conn) && !(conn->link_mode & HCI_LM_ENCRYPT))
return 0;
return 1;
}
-EXPORT_SYMBOL(hci_conn_check_link_mode);
/* Authenticate remote device */
static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
{
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
if (conn->pending_sec_level > sec_level)
sec_level = conn->pending_sec_level;
@@ -600,7 +592,7 @@ static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
cp.handle = cpu_to_le16(conn->handle);
hci_send_cmd(conn->hdev, HCI_OP_AUTH_REQUESTED,
- sizeof(cp), &cp);
+ sizeof(cp), &cp);
if (conn->key_type != 0xff)
set_bit(HCI_CONN_REAUTH_PEND, &conn->flags);
}
@@ -611,21 +603,21 @@ static int hci_conn_auth(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
/* Encrypt the the link */
static void hci_conn_encrypt(struct hci_conn *conn)
{
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
if (!test_and_set_bit(HCI_CONN_ENCRYPT_PEND, &conn->flags)) {
struct hci_cp_set_conn_encrypt cp;
cp.handle = cpu_to_le16(conn->handle);
cp.encrypt = 0x01;
hci_send_cmd(conn->hdev, HCI_OP_SET_CONN_ENCRYPT, sizeof(cp),
- &cp);
+ &cp);
}
}
/* Enable security */
int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
{
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
/* For sdp we don't need the link key. */
if (sec_level == BT_SECURITY_SDP)
@@ -648,8 +640,7 @@ int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
/* An unauthenticated combination key has sufficient security for
security level 1 and 2. */
if (conn->key_type == HCI_LK_UNAUTH_COMBINATION &&
- (sec_level == BT_SECURITY_MEDIUM ||
- sec_level == BT_SECURITY_LOW))
+ (sec_level == BT_SECURITY_MEDIUM || sec_level == BT_SECURITY_LOW))
goto encrypt;
/* A combination key has always sufficient security for the security
@@ -657,8 +648,7 @@ int hci_conn_security(struct hci_conn *conn, __u8 sec_level, __u8 auth_type)
is generated using maximum PIN code length (16).
For pre 2.1 units. */
if (conn->key_type == HCI_LK_COMBINATION &&
- (sec_level != BT_SECURITY_HIGH ||
- conn->pin_length == 16))
+ (sec_level != BT_SECURITY_HIGH || conn->pin_length == 16))
goto encrypt;
auth:
@@ -680,7 +670,7 @@ EXPORT_SYMBOL(hci_conn_security);
/* Check secure link requirement */
int hci_conn_check_secure(struct hci_conn *conn, __u8 sec_level)
{
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
if (sec_level != BT_SECURITY_HIGH)
return 1; /* Accept if non-secure is required */
@@ -695,23 +685,22 @@ EXPORT_SYMBOL(hci_conn_check_secure);
/* Change link key */
int hci_conn_change_link_key(struct hci_conn *conn)
{
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
if (!test_and_set_bit(HCI_CONN_AUTH_PEND, &conn->flags)) {
struct hci_cp_change_conn_link_key cp;
cp.handle = cpu_to_le16(conn->handle);
hci_send_cmd(conn->hdev, HCI_OP_CHANGE_CONN_LINK_KEY,
- sizeof(cp), &cp);
+ sizeof(cp), &cp);
}
return 0;
}
-EXPORT_SYMBOL(hci_conn_change_link_key);
/* Switch role */
int hci_conn_switch_role(struct hci_conn *conn, __u8 role)
{
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
if (!role && conn->link_mode & HCI_LM_MASTER)
return 1;
@@ -732,7 +721,7 @@ void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
{
struct hci_dev *hdev = conn->hdev;
- BT_DBG("conn %p mode %d", conn, conn->mode);
+ BT_DBG("hcon %p mode %d", conn, conn->mode);
if (test_bit(HCI_RAW, &hdev->flags))
return;
@@ -752,7 +741,7 @@ void hci_conn_enter_active_mode(struct hci_conn *conn, __u8 force_active)
timer:
if (hdev->idle_timeout > 0)
mod_timer(&conn->idle_timer,
- jiffies + msecs_to_jiffies(hdev->idle_timeout));
+ jiffies + msecs_to_jiffies(hdev->idle_timeout));
}
/* Drop all connection on the device */
@@ -802,7 +791,7 @@ EXPORT_SYMBOL(hci_conn_put_device);
int hci_get_conn_list(void __user *arg)
{
- register struct hci_conn *c;
+ struct hci_conn *c;
struct hci_conn_list_req req, *cl;
struct hci_conn_info *ci;
struct hci_dev *hdev;
@@ -906,7 +895,7 @@ struct hci_chan *hci_chan_create(struct hci_conn *conn)
struct hci_dev *hdev = conn->hdev;
struct hci_chan *chan;
- BT_DBG("%s conn %p", hdev->name, conn);
+ BT_DBG("%s hcon %p", hdev->name, conn);
chan = kzalloc(sizeof(struct hci_chan), GFP_KERNEL);
if (!chan)
@@ -925,7 +914,7 @@ int hci_chan_del(struct hci_chan *chan)
struct hci_conn *conn = chan->conn;
struct hci_dev *hdev = conn->hdev;
- BT_DBG("%s conn %p chan %p", hdev->name, conn, chan);
+ BT_DBG("%s hcon %p chan %p", hdev->name, conn, chan);
list_del_rcu(&chan->list);
@@ -941,7 +930,7 @@ void hci_chan_list_flush(struct hci_conn *conn)
{
struct hci_chan *chan, *n;
- BT_DBG("conn %p", conn);
+ BT_DBG("hcon %p", conn);
list_for_each_entry_safe(chan, n, &conn->chan_list, list)
hci_chan_del(chan);
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