diff options
| author | Thomas Graf <tgraf@suug.ch> | 2012-12-06 09:25:05 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-12-07 14:15:04 -0500 |
| commit | 45122ca26ced7fae41049326a3797a73f961db2e (patch) | |
| tree | 347843ccf9b6a9eb9a4507e07b4c19faf0e59f70 /net/sctp/associola.c | |
| parent | 0b0fe913bf6d551642eb8892ed90be7358906379 (diff) | |
| download | linux-45122ca26ced7fae41049326a3797a73f961db2e.tar.bz2 | |
sctp: Add RCU protection to assoc->transport_addr_list
peer.transport_addr_list is currently only protected by sk_sock
which is inpractical to acquire for procfs dumping purposes.
This patch adds RCU protection allowing for the procfs readers to
enter RCU read-side critical sections.
Modification of the list continues to be serialized via sk_lock.
V2: Use list_del_rcu() in sctp_association_free() to be safe
Skip transports marked dead when dumping for procfs
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sctp/associola.c')
| -rw-r--r-- | net/sctp/associola.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/net/sctp/associola.c b/net/sctp/associola.c index ba3f9cc4c047..b45ed1f96921 100644 --- a/net/sctp/associola.c +++ b/net/sctp/associola.c @@ -448,7 +448,7 @@ void sctp_association_free(struct sctp_association *asoc) /* Release the transport structures. */ list_for_each_safe(pos, temp, &asoc->peer.transport_addr_list) { transport = list_entry(pos, struct sctp_transport, transports); - list_del(pos); + list_del_rcu(pos); sctp_transport_free(transport); } @@ -568,7 +568,7 @@ void sctp_assoc_rm_peer(struct sctp_association *asoc, sctp_assoc_update_retran_path(asoc); /* Remove this peer from the list. */ - list_del(&peer->transports); + list_del_rcu(&peer->transports); /* Get the first transport of asoc. */ pos = asoc->peer.transport_addr_list.next; @@ -769,7 +769,7 @@ struct sctp_transport *sctp_assoc_add_peer(struct sctp_association *asoc, peer->state = peer_state; /* Attach the remote transport to our asoc. */ - list_add_tail(&peer->transports, &asoc->peer.transport_addr_list); + list_add_tail_rcu(&peer->transports, &asoc->peer.transport_addr_list); asoc->peer.transport_count++; /* If we do not yet have a primary path, set one. */ |