From 73cb88ecb950ee67906d02354f781ea293bcf895 Mon Sep 17 00:00:00 2001 From: Arjan van de Ven Date: Sun, 30 Oct 2011 06:46:30 +0000 Subject: net: make the tcp and udp file_operations for the /proc stuff const the tcp and udp code creates a set of struct file_operations at runtime while it can also be done at compile time, with the added benefit of then having these file operations be const. the trickiest part was to get the "THIS_MODULE" reference right; the naive method of declaring a struct in the place of registration would not work for this reason. Signed-off-by: Arjan van de Ven Signed-off-by: David S. Miller --- net/ipv4/tcp_ipv4.c | 22 ++++++++++++---------- 1 file changed, 12 insertions(+), 10 deletions(-) (limited to 'net/ipv4/tcp_ipv4.c') diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 0ea10eefa60..939c55eceb5 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -2339,7 +2339,7 @@ static void tcp_seq_stop(struct seq_file *seq, void *v) } } -static int tcp_seq_open(struct inode *inode, struct file *file) +int tcp_seq_open(struct inode *inode, struct file *file) { struct tcp_seq_afinfo *afinfo = PDE(inode)->data; struct tcp_iter_state *s; @@ -2355,23 +2355,19 @@ static int tcp_seq_open(struct inode *inode, struct file *file) s->last_pos = 0; return 0; } +EXPORT_SYMBOL(tcp_seq_open); int tcp_proc_register(struct net *net, struct tcp_seq_afinfo *afinfo) { int rc = 0; struct proc_dir_entry *p; - afinfo->seq_fops.open = tcp_seq_open; - afinfo->seq_fops.read = seq_read; - afinfo->seq_fops.llseek = seq_lseek; - afinfo->seq_fops.release = seq_release_net; - afinfo->seq_ops.start = tcp_seq_start; afinfo->seq_ops.next = tcp_seq_next; afinfo->seq_ops.stop = tcp_seq_stop; p = proc_create_data(afinfo->name, S_IRUGO, net->proc_net, - &afinfo->seq_fops, afinfo); + afinfo->seq_fops, afinfo); if (!p) rc = -ENOMEM; return rc; @@ -2520,12 +2516,18 @@ out: return 0; } +static const struct file_operations tcp_afinfo_seq_fops = { + .owner = THIS_MODULE, + .open = tcp_seq_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release_net +}; + static struct tcp_seq_afinfo tcp4_seq_afinfo = { .name = "tcp", .family = AF_INET, - .seq_fops = { - .owner = THIS_MODULE, - }, + .seq_fops = &tcp_afinfo_seq_fops, .seq_ops = { .show = tcp4_seq_show, }, -- cgit v1.2.3-70-g09d2 From 918eb39962dfff9490a43cd08176b962cacc7978 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 2 Nov 2011 12:42:56 +0000 Subject: net: add missing bh_unlock_sock() calls Simon Kirby reported lockdep warnings and following messages : [104661.897577] huh, entered softirq 3 NET_RX ffffffff81613740 preempt_count 00000101, exited with 00000102? [104661.923653] huh, entered softirq 3 NET_RX ffffffff81613740 preempt_count 00000101, exited with 00000102? Problem comes from commit 0e734419 (ipv4: Use inet_csk_route_child_sock() in DCCP and TCP.) If inet_csk_route_child_sock() returns NULL, we should release socket lock before freeing it. Another lock imbalance exists if __inet_inherit_port() returns an error since commit 093d282321da ( tproxy: fix hash locking issue when using port redirection in __inet_inherit_port()) a backport is also needed for >= 2.6.37 kernels. Reported-by: Simon Kirby Signed-off-by: Eric Dumazet Tested-by: Eric Dumazet CC: Balazs Scheidler CC: KOVACS Krisztian Reviewed-by: Thomas Gleixner Tested-by: Simon Kirby Signed-off-by: David S. Miller --- net/dccp/ipv4.c | 1 + net/ipv4/tcp_ipv4.c | 1 + 2 files changed, 2 insertions(+) (limited to 'net/ipv4/tcp_ipv4.c') diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 332639b56f4..90a919afbed 100644 --- a/net/dccp/ipv4.c +++ b/net/dccp/ipv4.c @@ -433,6 +433,7 @@ exit: NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS); return NULL; put_and_exit: + bh_unlock_sock(newsk); sock_put(newsk); goto exit; } diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c index 939c55eceb5..a7443159c40 100644 --- a/net/ipv4/tcp_ipv4.c +++ b/net/ipv4/tcp_ipv4.c @@ -1510,6 +1510,7 @@ exit: NET_INC_STATS_BH(sock_net(sk), LINUX_MIB_LISTENDROPS); return NULL; put_and_exit: + bh_unlock_sock(newsk); sock_put(newsk); goto exit; } -- cgit v1.2.3-70-g09d2