diff options
| author | Jason Wang <jasowang@redhat.com> | 2013-01-11 20:59:32 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-01-12 07:42:02 +0400 |
| commit | b8deabd3eebaa96cf8d6e290d67b03f36c7f7a41 (patch) | |
| tree | a571817b2de3d0f113458f60c64649069f344ddf | |
| parent | d07d7507bfb4e23735c9b83e397c43e1e8a173e8 (diff) | |
| download | linux-b8deabd3eebaa96cf8d6e290d67b03f36c7f7a41.tar.xz | |
tuntap: switch to use rtnl_dereference()
Switch to use rtnl_dereference() instead of the open code, suggested by Eric.
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/tun.c | 27 |
1 files changed, 10 insertions, 17 deletions
diff --git a/drivers/net/tun.c b/drivers/net/tun.c index 99b58d862174..aa963c44450a 100644 --- a/drivers/net/tun.c +++ b/drivers/net/tun.c @@ -404,8 +404,8 @@ static void __tun_detach(struct tun_file *tfile, bool clean) struct tun_struct *tun; struct net_device *dev; - tun = rcu_dereference_protected(tfile->tun, - lockdep_rtnl_is_held()); + tun = rtnl_dereference(tfile->tun); + if (tun) { u16 index = tfile->queue_index; BUG_ON(index >= tun->numqueues); @@ -414,8 +414,7 @@ static void __tun_detach(struct tun_file *tfile, bool clean) rcu_assign_pointer(tun->tfiles[index], tun->tfiles[tun->numqueues - 1]); rcu_assign_pointer(tfile->tun, NULL); - ntfile = rcu_dereference_protected(tun->tfiles[index], - lockdep_rtnl_is_held()); + ntfile = rtnl_dereference(tun->tfiles[index]); ntfile->queue_index = index; --tun->numqueues; @@ -458,8 +457,7 @@ static void tun_detach_all(struct net_device *dev) int i, n = tun->numqueues; for (i = 0; i < n; i++) { - tfile = rcu_dereference_protected(tun->tfiles[i], - lockdep_rtnl_is_held()); + tfile = rtnl_dereference(tun->tfiles[i]); BUG_ON(!tfile); wake_up_all(&tfile->wq.wait); rcu_assign_pointer(tfile->tun, NULL); @@ -469,8 +467,7 @@ static void tun_detach_all(struct net_device *dev) synchronize_net(); for (i = 0; i < n; i++) { - tfile = rcu_dereference_protected(tun->tfiles[i], - lockdep_rtnl_is_held()); + tfile = rtnl_dereference(tun->tfiles[i]); /* Drop read queue */ skb_queue_purge(&tfile->sk.sk_receive_queue); sock_put(&tfile->sk); @@ -489,7 +486,7 @@ static int tun_attach(struct tun_struct *tun, struct file *file) int err; err = -EINVAL; - if (rcu_dereference_protected(tfile->tun, lockdep_rtnl_is_held())) + if (rtnl_dereference(tfile->tun)) goto out; if (tfile->detached && tun != tfile->detached) goto out; @@ -1740,8 +1737,7 @@ static void tun_detach_filter(struct tun_struct *tun, int n) struct tun_file *tfile; for (i = 0; i < n; i++) { - tfile = rcu_dereference_protected(tun->tfiles[i], - lockdep_rtnl_is_held()); + tfile = rtnl_dereference(tun->tfiles[i]); sk_detach_filter(tfile->socket.sk); } @@ -1754,8 +1750,7 @@ static int tun_attach_filter(struct tun_struct *tun) struct tun_file *tfile; for (i = 0; i < tun->numqueues; i++) { - tfile = rcu_dereference_protected(tun->tfiles[i], - lockdep_rtnl_is_held()); + tfile = rtnl_dereference(tun->tfiles[i]); ret = sk_attach_filter(&tun->fprog, tfile->socket.sk); if (ret) { tun_detach_filter(tun, i); @@ -1773,8 +1768,7 @@ static void tun_set_sndbuf(struct tun_struct *tun) int i; for (i = 0; i < tun->numqueues; i++) { - tfile = rcu_dereference_protected(tun->tfiles[i], - lockdep_rtnl_is_held()); + tfile = rtnl_dereference(tun->tfiles[i]); tfile->socket.sk->sk_sndbuf = tun->sndbuf; } } @@ -1794,8 +1788,7 @@ static int tun_set_queue(struct file *file, struct ifreq *ifr) else ret = tun_attach(tun, file); } else if (ifr->ifr_flags & IFF_DETACH_QUEUE) { - tun = rcu_dereference_protected(tfile->tun, - lockdep_rtnl_is_held()); + tun = rtnl_dereference(tfile->tun); if (!tun || !(tun->flags & TUN_TAP_MQ)) ret = -EINVAL; else |