#include <linux/net_tstamp.h>
#include <net/xfrm.h>
#include <linux/ipsec.h>
+#include <net/cls_cgroup.h>
#include <linux/filter.h>
* strings build-time, so that runtime initialization of socket
* locks is fast):
*/
-static const char *af_family_key_strings[AF_MAX+1] = {
+static const char *const af_family_key_strings[AF_MAX+1] = {
"sk_lock-AF_UNSPEC", "sk_lock-AF_UNIX" , "sk_lock-AF_INET" ,
"sk_lock-AF_AX25" , "sk_lock-AF_IPX" , "sk_lock-AF_APPLETALK",
"sk_lock-AF_NETROM", "sk_lock-AF_BRIDGE" , "sk_lock-AF_ATMPVC" ,
"sk_lock-AF_IEEE802154",
"sk_lock-AF_MAX"
};
-static const char *af_family_slock_key_strings[AF_MAX+1] = {
+static const char *const af_family_slock_key_strings[AF_MAX+1] = {
"slock-AF_UNSPEC", "slock-AF_UNIX" , "slock-AF_INET" ,
"slock-AF_AX25" , "slock-AF_IPX" , "slock-AF_APPLETALK",
"slock-AF_NETROM", "slock-AF_BRIDGE" , "slock-AF_ATMPVC" ,
"slock-AF_IEEE802154",
"slock-AF_MAX"
};
-static const char *af_family_clock_key_strings[AF_MAX+1] = {
+static const char *const af_family_clock_key_strings[AF_MAX+1] = {
"clock-AF_UNSPEC", "clock-AF_UNIX" , "clock-AF_INET" ,
"clock-AF_AX25" , "clock-AF_IPX" , "clock-AF_APPLETALK",
"clock-AF_NETROM", "clock-AF_BRIDGE" , "clock-AF_ATMPVC" ,
int sysctl_optmem_max __read_mostly = sizeof(unsigned long)*(2*UIO_MAXIOV+512);
EXPORT_SYMBOL(sysctl_optmem_max);
+#if defined(CONFIG_CGROUPS) && !defined(CONFIG_NET_CLS_CGROUP)
+int net_cls_subsys_id = -1;
+EXPORT_SYMBOL_GPL(net_cls_subsys_id);
+#endif
+
static int sock_set_timeout(long *timeo_p, char __user *optval, int optlen)
{
struct timeval tv;
int sock_queue_rcv_skb(struct sock *sk, struct sk_buff *skb)
{
- int err = 0;
+ int err;
int skb_len;
+ unsigned long flags;
+ struct sk_buff_head *list = &sk->sk_receive_queue;
/* Cast sk->rcvbuf to unsigned... It's pointless, but reduces
number of warnings when compiling with -W --ANK
*/
if (atomic_read(&sk->sk_rmem_alloc) + skb->truesize >=
(unsigned)sk->sk_rcvbuf) {
- err = -ENOMEM;
- goto out;
+ atomic_inc(&sk->sk_drops);
+ return -ENOMEM;
}
err = sk_filter(sk, skb);
if (err)
- goto out;
+ return err;
if (!sk_rmem_schedule(sk, skb->truesize)) {
- err = -ENOBUFS;
- goto out;
+ atomic_inc(&sk->sk_drops);
+ return -ENOBUFS;
}
skb->dev = NULL;
*/
skb_len = skb->len;
- skb_queue_tail(&sk->sk_receive_queue, skb);
+ /* we escape from rcu protected region, make sure we dont leak
+ * a norefcounted dst
+ */
+ skb_dst_force(skb);
+
+ spin_lock_irqsave(&list->lock, flags);
+ skb->dropcount = atomic_read(&sk->sk_drops);
+ __skb_queue_tail(list, skb);
+ spin_unlock_irqrestore(&list->lock, flags);
if (!sock_flag(sk, SOCK_DEAD))
sk->sk_data_ready(sk, skb_len);
-out:
- return err;
+ return 0;
}
EXPORT_SYMBOL(sock_queue_rcv_skb);
skb->dev = NULL;
+ if (sk_rcvqueues_full(sk, skb)) {
+ atomic_inc(&sk->sk_drops);
+ goto discard_and_relse;
+ }
if (nested)
bh_lock_sock_nested(sk);
else
rc = sk_backlog_rcv(sk, skb);
mutex_release(&sk->sk_lock.dep_map, 1, _RET_IP_);
- } else
- sk_add_backlog(sk, skb);
+ } else if (sk_add_backlog(sk, skb)) {
+ bh_unlock_sock(sk);
+ atomic_inc(&sk->sk_drops);
+ goto discard_and_relse;
+ }
+
bh_unlock_sock(sk);
out:
sock_put(sk);
}
EXPORT_SYMBOL(sk_receive_skb);
+void sk_reset_txq(struct sock *sk)
+{
+ sk_tx_queue_clear(sk);
+}
+EXPORT_SYMBOL(sk_reset_txq);
+
struct dst_entry *__sk_dst_check(struct sock *sk, u32 cookie)
{
- struct dst_entry *dst = sk->sk_dst_cache;
+ struct dst_entry *dst = __sk_dst_get(sk);
if (dst && dst->obsolete && dst->ops->check(dst, cookie) == NULL) {
- sk->sk_dst_cache = NULL;
+ sk_tx_queue_clear(sk);
+ rcu_assign_pointer(sk->sk_dst_cache, NULL);
dst_release(dst);
return NULL;
}
if (copy_from_user(devname, optval, optlen))
goto out;
- if (devname[0] == '\0') {
- index = 0;
- } else {
- struct net_device *dev = dev_get_by_name(net, devname);
+ index = 0;
+ if (devname[0] != '\0') {
+ struct net_device *dev;
+ rcu_read_lock();
+ dev = dev_get_by_name_rcu(net, devname);
+ if (dev)
+ index = dev->ifindex;
+ rcu_read_unlock();
ret = -ENODEV;
if (!dev)
goto out;
-
- index = dev->ifindex;
- dev_put(dev);
}
lock_sock(sk);
*/
int sock_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
int val;
sk->sk_reuse = valbool;
break;
case SO_TYPE:
+ case SO_PROTOCOL:
+ case SO_DOMAIN:
case SO_ERROR:
ret = -ENOPROTOOPT;
break;
/* We implement the SO_SNDLOWAT etc to
not be settable (1003.1g 5.3) */
+ case SO_RXQ_OVFL:
+ if (valbool)
+ sock_set_flag(sk, SOCK_RXQ_OVFL);
+ else
+ sock_reset_flag(sk, SOCK_RXQ_OVFL);
+ break;
default:
ret = -ENOPROTOOPT;
break;
struct timeval tm;
} v;
- unsigned int lv = sizeof(int);
+ int lv = sizeof(int);
int len;
if (get_user(len, optlen))
v.val = sk->sk_type;
break;
+ case SO_PROTOCOL:
+ v.val = sk->sk_protocol;
+ break;
+
+ case SO_DOMAIN:
+ v.val = sk->sk_family;
+ break;
+
case SO_ERROR:
v.val = -sock_error(sk);
if (v.val == 0)
v.val = sk->sk_mark;
break;
+ case SO_RXQ_OVFL:
+ v.val = !!sock_flag(sk, SOCK_RXQ_OVFL);
+ break;
+
default:
return -ENOPROTOOPT;
}
void *sptr = nsk->sk_security;
#endif
BUILD_BUG_ON(offsetof(struct sock, sk_copy_start) !=
- sizeof(osk->sk_node) + sizeof(osk->sk_refcnt));
+ sizeof(osk->sk_node) + sizeof(osk->sk_refcnt) +
+ sizeof(osk->sk_tx_queue_mapping));
memcpy(&nsk->sk_copy_start, &osk->sk_copy_start,
osk->sk_prot->obj_size - offsetof(struct sock, sk_copy_start));
#ifdef CONFIG_SECURITY_NETWORK
if (!try_module_get(prot->owner))
goto out_free_sec;
+ sk_tx_queue_clear(sk);
}
return sk;
module_put(owner);
}
+#ifdef CONFIG_CGROUPS
+void sock_update_classid(struct sock *sk)
+{
+ u32 classid = task_cls_classid(current);
+
+ if (classid && classid != sk->sk_classid)
+ sk->sk_classid = classid;
+}
+EXPORT_SYMBOL(sock_update_classid);
+#endif
+
/**
* sk_alloc - All socket objects are allocated here
* @net: the applicable net namespace
sock_lock_init(sk);
sock_net_set(sk, get_net(net));
atomic_set(&sk->sk_wmem_alloc, 1);
+
+ sock_update_classid(sk);
}
return sk;
if (sk->sk_destruct)
sk->sk_destruct(sk);
- filter = rcu_dereference(sk->sk_filter);
+ filter = rcu_dereference_check(sk->sk_filter,
+ atomic_read(&sk->sk_wmem_alloc) == 0);
if (filter) {
sk_filter_uncharge(sk, filter);
rcu_assign_pointer(sk->sk_filter, NULL);
sock_lock_init(newsk);
bh_lock_sock(newsk);
newsk->sk_backlog.head = newsk->sk_backlog.tail = NULL;
+ newsk->sk_backlog.len = 0;
atomic_set(&newsk->sk_rmem_alloc, 0);
/*
skb_queue_head_init(&newsk->sk_async_wait_queue);
#endif
- rwlock_init(&newsk->sk_dst_lock);
+ spin_lock_init(&newsk->sk_dst_lock);
rwlock_init(&newsk->sk_callback_lock);
lockdep_set_class_and_name(&newsk->sk_callback_lock,
af_callback_keys + newsk->sk_family,
*/
sk_refcnt_debug_inc(newsk);
sk_set_socket(newsk, NULL);
- newsk->sk_sleep = NULL;
+ newsk->sk_wq = NULL;
if (newsk->sk_prot->sockets_allocated)
percpu_counter_inc(newsk->sk_prot->sockets_allocated);
+
+ if (sock_flag(newsk, SOCK_TIMESTAMP) ||
+ sock_flag(newsk, SOCK_TIMESTAMPING_RX_SOFTWARE))
+ net_enable_timestamp();
}
out:
return newsk;
sk->sk_route_caps = dst->dev->features;
if (sk->sk_route_caps & NETIF_F_GSO)
sk->sk_route_caps |= NETIF_F_GSO_SOFTWARE;
+ sk->sk_route_caps &= ~sk->sk_route_nocaps;
if (sk_can_gso(sk)) {
if (dst->header_len) {
sk->sk_route_caps &= ~NETIF_F_GSO_MASK;
void __init sk_init(void)
{
- if (num_physpages <= 4096) {
+ if (totalram_pages <= 4096) {
sysctl_wmem_max = 32767;
sysctl_rmem_max = 32767;
sysctl_wmem_default = 32767;
sysctl_rmem_default = 32767;
- } else if (num_physpages >= 131072) {
+ } else if (totalram_pages >= 131072) {
sysctl_wmem_max = 131071;
sysctl_rmem_max = 131071;
}
void sock_wfree(struct sk_buff *skb)
{
struct sock *sk = skb->sk;
- int res;
+ unsigned int len = skb->truesize;
- /* In case it might be waiting for more memory. */
- res = atomic_sub_return(skb->truesize, &sk->sk_wmem_alloc);
- if (!sock_flag(sk, SOCK_USE_WRITE_QUEUE))
+ if (!sock_flag(sk, SOCK_USE_WRITE_QUEUE)) {
+ /*
+ * Keep a reference on sk_wmem_alloc, this will be released
+ * after sk_write_space() call
+ */
+ atomic_sub(len - 1, &sk->sk_wmem_alloc);
sk->sk_write_space(sk);
+ len = 1;
+ }
/*
- * if sk_wmem_alloc reached 0, we are last user and should
- * free this sock, as sk_free() call could not do it.
+ * if sk_wmem_alloc reaches 0, we must finish what sk_free()
+ * could not do because of in-flight packets
*/
- if (res == 0)
+ if (atomic_sub_and_test(len, &sk->sk_wmem_alloc))
__sk_free(sk);
}
EXPORT_SYMBOL(sock_wfree);
if (signal_pending(current))
break;
set_bit(SOCK_NOSPACE, &sk->sk_socket->flags);
- prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
if (atomic_read(&sk->sk_wmem_alloc) < sk->sk_sndbuf)
break;
if (sk->sk_shutdown & SEND_SHUTDOWN)
break;
timeo = schedule_timeout(timeo);
}
- finish_wait(sk->sk_sleep, &wait);
+ finish_wait(sk_sleep(sk), &wait);
return timeo;
}
do {
struct sk_buff *next = skb->next;
+ WARN_ON_ONCE(skb_dst_is_noref(skb));
skb->next = NULL;
sk_backlog_rcv(sk, skb);
bh_lock_sock(sk);
} while ((skb = sk->sk_backlog.head) != NULL);
+
+ /*
+ * Doing the zeroing here guarantee we can not loop forever
+ * while a wild producer attempts to flood us.
+ */
+ sk->sk_backlog.len = 0;
}
/**
int rc;
DEFINE_WAIT(wait);
- prepare_to_wait(sk->sk_sleep, &wait, TASK_INTERRUPTIBLE);
+ prepare_to_wait(sk_sleep(sk), &wait, TASK_INTERRUPTIBLE);
set_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
rc = sk_wait_event(sk, timeo, !skb_queue_empty(&sk->sk_receive_queue));
clear_bit(SOCK_ASYNC_WAITDATA, &sk->sk_socket->flags);
- finish_wait(sk->sk_sleep, &wait);
+ finish_wait(sk_sleep(sk), &wait);
return rc;
}
EXPORT_SYMBOL(sk_wait_data);
EXPORT_SYMBOL(sock_no_shutdown);
int sock_no_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
return -EOPNOTSUPP;
}
static void sock_def_wakeup(struct sock *sk)
{
- read_lock(&sk->sk_callback_lock);
- if (sk_has_sleeper(sk))
- wake_up_interruptible_all(sk->sk_sleep);
- read_unlock(&sk->sk_callback_lock);
+ struct socket_wq *wq;
+
+ rcu_read_lock();
+ wq = rcu_dereference(sk->sk_wq);
+ if (wq_has_sleeper(wq))
+ wake_up_interruptible_all(&wq->wait);
+ rcu_read_unlock();
}
static void sock_def_error_report(struct sock *sk)
{
- read_lock(&sk->sk_callback_lock);
- if (sk_has_sleeper(sk))
- wake_up_interruptible_poll(sk->sk_sleep, POLLERR);
+ struct socket_wq *wq;
+
+ rcu_read_lock();
+ wq = rcu_dereference(sk->sk_wq);
+ if (wq_has_sleeper(wq))
+ wake_up_interruptible_poll(&wq->wait, POLLERR);
sk_wake_async(sk, SOCK_WAKE_IO, POLL_ERR);
- read_unlock(&sk->sk_callback_lock);
+ rcu_read_unlock();
}
static void sock_def_readable(struct sock *sk, int len)
{
- read_lock(&sk->sk_callback_lock);
- if (sk_has_sleeper(sk))
- wake_up_interruptible_sync_poll(sk->sk_sleep, POLLIN |
+ struct socket_wq *wq;
+
+ rcu_read_lock();
+ wq = rcu_dereference(sk->sk_wq);
+ if (wq_has_sleeper(wq))
+ wake_up_interruptible_sync_poll(&wq->wait, POLLIN |
POLLRDNORM | POLLRDBAND);
sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
- read_unlock(&sk->sk_callback_lock);
+ rcu_read_unlock();
}
static void sock_def_write_space(struct sock *sk)
{
- read_lock(&sk->sk_callback_lock);
+ struct socket_wq *wq;
+
+ rcu_read_lock();
/* Do not wake up a writer until he can make "significant"
* progress. --DaveM
*/
if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) {
- if (sk_has_sleeper(sk))
- wake_up_interruptible_sync_poll(sk->sk_sleep, POLLOUT |
+ wq = rcu_dereference(sk->sk_wq);
+ if (wq_has_sleeper(wq))
+ wake_up_interruptible_sync_poll(&wq->wait, POLLOUT |
POLLWRNORM | POLLWRBAND);
/* Should agree with poll, otherwise some programs break */
sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);
}
- read_unlock(&sk->sk_callback_lock);
+ rcu_read_unlock();
}
static void sock_def_destruct(struct sock *sk)
if (sock) {
sk->sk_type = sock->type;
- sk->sk_sleep = &sock->wait;
+ sk->sk_wq = sock->wq;
sock->sk = sk;
} else
- sk->sk_sleep = NULL;
+ sk->sk_wq = NULL;
- rwlock_init(&sk->sk_dst_lock);
+ spin_lock_init(&sk->sk_dst_lock);
rwlock_init(&sk->sk_callback_lock);
lockdep_set_class_and_name(&sk->sk_callback_lock,
af_callback_keys + sk->sk_family,
* Set socket options on an inet socket.
*/
int sock_common_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
#ifdef CONFIG_COMPAT
int compat_sock_common_setsockopt(struct socket *sock, int level, int optname,
- char __user *optval, int optlen)
+ char __user *optval, unsigned int optlen)
{
struct sock *sk = sock->sk;
}
EXPORT_SYMBOL_GPL(sock_prot_inuse_get);
-static int sock_inuse_init_net(struct net *net)
+static int __net_init sock_inuse_init_net(struct net *net)
{
net->core.inuse = alloc_percpu(struct prot_inuse);
return net->core.inuse ? 0 : -ENOMEM;
}
-static void sock_inuse_exit_net(struct net *net)
+static void __net_exit sock_inuse_exit_net(struct net *net)
{
free_percpu(net->core.inuse);
}
}
if (prot->rsk_prot != NULL) {
- static const char mask[] = "request_sock_%s";
-
- prot->rsk_prot->slab_name = kmalloc(strlen(prot->name) + sizeof(mask) - 1, GFP_KERNEL);
+ prot->rsk_prot->slab_name = kasprintf(GFP_KERNEL, "request_sock_%s", prot->name);
if (prot->rsk_prot->slab_name == NULL)
goto out_free_sock_slab;
- sprintf(prot->rsk_prot->slab_name, mask, prot->name);
prot->rsk_prot->slab = kmem_cache_create(prot->rsk_prot->slab_name,
prot->rsk_prot->obj_size, 0,
SLAB_HWCACHE_ALIGN, NULL);
}
if (prot->twsk_prot != NULL) {
- static const char mask[] = "tw_sock_%s";
-
- prot->twsk_prot->twsk_slab_name = kmalloc(strlen(prot->name) + sizeof(mask) - 1, GFP_KERNEL);
+ prot->twsk_prot->twsk_slab_name = kasprintf(GFP_KERNEL, "tw_sock_%s", prot->name);
if (prot->twsk_prot->twsk_slab_name == NULL)
goto out_free_request_sock_slab;
- sprintf(prot->twsk_prot->twsk_slab_name, mask, prot->name);
prot->twsk_prot->twsk_slab =
kmem_cache_create(prot->twsk_prot->twsk_slab_name,
prot->twsk_prot->twsk_obj_size,
prot->rsk_prot->slab = NULL;
}
out_free_request_sock_slab_name:
- kfree(prot->rsk_prot->slab_name);
+ if (prot->rsk_prot)
+ kfree(prot->rsk_prot->slab_name);
out_free_sock_slab:
kmem_cache_destroy(prot->slab);
prot->slab = NULL;
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff