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| author | Ying Xue <ying.xue@windriver.com> | 2014-04-21 10:55:45 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-04-22 21:17:52 -0400 |
| commit | f8322dfce5766c8e26d9224cbcaf6fdc0b2eb04d (patch) | |
| tree | 9631ad1e81d63e7199350788f997733a5eb873e9 /net/tipc/bcast.c | |
| parent | f97e455abf0d83b7d69da295163db18e3ebb4d8b (diff) | |
| download | linux-stable-f8322dfce5766c8e26d9224cbcaf6fdc0b2eb04d.tar.gz linux-stable-f8322dfce5766c8e26d9224cbcaf6fdc0b2eb04d.tar.bz2 linux-stable-f8322dfce5766c8e26d9224cbcaf6fdc0b2eb04d.zip | |
tipc: convert bearer_list to RCU list
Convert bearer_list to RCU list. It's protected by RTNL lock on
update side, and RCU read lock is applied to read side.
Signed-off-by: Ying Xue <ying.xue@windriver.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Reviewed-by: Erik Hugne <erik.hugne@ericsson.com>
Tested-by: Erik Hugne <erik.hugne@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/tipc/bcast.c')
| -rw-r--r-- | net/tipc/bcast.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/net/tipc/bcast.c b/net/tipc/bcast.c index 95ab5ef92920..223a19929024 100644 --- a/net/tipc/bcast.c +++ b/net/tipc/bcast.c @@ -659,6 +659,7 @@ void tipc_bcbearer_sort(void) { struct tipc_bcbearer_pair *bp_temp = bcbearer->bpairs_temp; struct tipc_bcbearer_pair *bp_curr; + struct tipc_bearer *b; int b_index; int pri; @@ -667,8 +668,9 @@ void tipc_bcbearer_sort(void) /* Group bearers by priority (can assume max of two per priority) */ memset(bp_temp, 0, sizeof(bcbearer->bpairs_temp)); + rcu_read_lock(); for (b_index = 0; b_index < MAX_BEARERS; b_index++) { - struct tipc_bearer *b = bearer_list[b_index]; + b = rcu_dereference_rtnl(bearer_list[b_index]); if (!b || !b->nodes.count) continue; @@ -677,6 +679,7 @@ void tipc_bcbearer_sort(void) else bp_temp[b->priority].secondary = b; } + rcu_read_unlock(); /* Create array of bearer pairs for broadcasting */ bp_curr = bcbearer->bpairs; @@ -784,7 +787,7 @@ void tipc_bclink_init(void) bcl->max_pkt = MAX_PKT_DEFAULT_MCAST; tipc_link_set_queue_limits(bcl, BCLINK_WIN_DEFAULT); bcl->b_ptr = &bcbearer->bearer; - bearer_list[BCBEARER] = &bcbearer->bearer; + rcu_assign_pointer(bearer_list[MAX_BEARERS], &bcbearer->bearer); bcl->state = WORKING_WORKING; strlcpy(bcl->name, tipc_bclink_name, TIPC_MAX_LINK_NAME); } @@ -795,7 +798,7 @@ void tipc_bclink_stop(void) tipc_link_purge_queues(bcl); spin_unlock_bh(&bc_lock); - bearer_list[BCBEARER] = NULL; + RCU_INIT_POINTER(bearer_list[BCBEARER], NULL); memset(bclink, 0, sizeof(*bclink)); memset(bcbearer, 0, sizeof(*bcbearer)); } |