diff options
| author | Allan Stephens <allan.stephens@windriver.com> | 2011-10-26 22:13:35 +0200 |
|---|---|---|
| committer | Paul Gortmaker <paul.gortmaker@windriver.com> | 2012-02-06 22:59:18 +0100 |
| commit | b98158e3b36645305363a598d91c544fa31446f1 (patch) | |
| tree | 0bef1102cf7010554b0937caef31c2fb35678bca | |
| parent | tipc: Fix bug in broadcast link duplicate message statistics (diff) | |
| download | linux-b98158e3b36645305363a598d91c544fa31446f1.tar.xz linux-b98158e3b36645305363a598d91c544fa31446f1.zip | |
tipc: Add missing locks in broadcast link statistics accumulation
Ensures that all attempts to update broadcast link statistics are done
only while holding the lock that protects the link's main data structures,
to prevent interference by simultaneous updates caused by messages
arriving on other interfaces.
Signed-off-by: Allan Stephens <allan.stephens@windriver.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
| -rw-r--r-- | net/tipc/bcast.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 035b350be5c6..facc216c6a92 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -520,6 +520,7 @@ void tipc_bclink_recv_pkt(struct sk_buff *buf) if (likely(seqno == next_in)) { receive: + spin_lock_bh(&bc_lock); bcl->stats.recv_info++; node->bclink.last_in++; bclink_set_gap(node); @@ -527,7 +528,9 @@ receive: bclink_send_ack(node); bcl->stats.sent_acks++; } + if (likely(msg_isdata(msg))) { + spin_unlock_bh(&bc_lock); tipc_node_unlock(node); if (likely(msg_mcast(msg))) tipc_port_recv_mcast(buf, NULL); @@ -536,6 +539,7 @@ receive: } else if (msg_user(msg) == MSG_BUNDLER) { bcl->stats.recv_bundles++; bcl->stats.recv_bundled += msg_msgcnt(msg); + spin_unlock_bh(&bc_lock); tipc_node_unlock(node); tipc_link_recv_bundle(buf); } else if (msg_user(msg) == MSG_FRAGMENTER) { @@ -543,12 +547,15 @@ receive: if (tipc_link_recv_fragment(&node->bclink.defragm, &buf, &msg)) bcl->stats.recv_fragmented++; + spin_unlock_bh(&bc_lock); tipc_node_unlock(node); tipc_net_route_msg(buf); } else if (msg_user(msg) == NAME_DISTRIBUTOR) { + spin_unlock_bh(&bc_lock); tipc_node_unlock(node); tipc_named_recv(buf); } else { + spin_unlock_bh(&bc_lock); tipc_node_unlock(node); buf_discard(buf); } @@ -601,11 +608,15 @@ receive: } else deferred = 0; + spin_lock_bh(&bc_lock); + if (deferred) bcl->stats.deferred_recv++; else bcl->stats.duplicates++; + spin_unlock_bh(&bc_lock); + unlock: tipc_node_unlock(node); exit: |