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| author | Ying Xue <ying.xue@windriver.com> | 2014-04-21 10:55:51 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2014-04-22 21:17:53 -0400 |
| commit | 28dd94187afd660a350d01d6bad4a915a6d570b8 (patch) | |
| tree | c53e49a95c682a5d656fa7e95d847a8ae10aeb50 /net/tipc/bearer.c | |
| parent | 4ae88c94d3b52dc47c6ad9352991219862f703f9 (diff) | |
| download | linux-28dd94187afd660a350d01d6bad4a915a6d570b8.tar.gz linux-28dd94187afd660a350d01d6bad4a915a6d570b8.tar.bz2 linux-28dd94187afd660a350d01d6bad4a915a6d570b8.zip | |
tipc: use bc_lock to protect node map in bearer structure
The node map variable - 'nodes' in bearer structure is only used by
bclink. When bclink accesses it, bc_lock is held. But when change it,
for instance, in tipc_bearer_add_dest() or tipc_bearer_remove_dest()
the bc_lock is not taken at all. To avoid any inconsistent data, we
should always grab bc_lock while accessing node map variable.
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/bearer.c')
| -rw-r--r-- | net/tipc/bearer.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 44fd22a0c070..3abd9702b887 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -220,8 +220,7 @@ void tipc_bearer_add_dest(u32 bearer_id, u32 dest) rcu_read_lock(); b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]); if (b_ptr) { - tipc_nmap_add(&b_ptr->nodes, dest); - tipc_bcbearer_sort(); + tipc_bcbearer_sort(&b_ptr->nodes, dest, true); tipc_disc_add_dest(b_ptr->link_req); } rcu_read_unlock(); @@ -234,8 +233,7 @@ void tipc_bearer_remove_dest(u32 bearer_id, u32 dest) rcu_read_lock(); b_ptr = rcu_dereference_rtnl(bearer_list[bearer_id]); if (b_ptr) { - tipc_nmap_remove(&b_ptr->nodes, dest); - tipc_bcbearer_sort(); + tipc_bcbearer_sort(&b_ptr->nodes, dest, false); tipc_disc_remove_dest(b_ptr->link_req); } rcu_read_unlock(); |