diff options
| 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/bearer.c | |
| parent | tipc: use RTNL lock to protect tipc_net_stop routine (diff) | |
| download | linux-dev-f8322dfce5766c8e26d9224cbcaf6fdc0b2eb04d.tar.xz linux-dev-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/bearer.c')
| -rw-r--r-- | net/tipc/bearer.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index dfb4c7fe4865..65b17639e43d 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -49,7 +49,7 @@ static struct tipc_media * const media_info_array[] = { NULL }; -struct tipc_bearer *bearer_list[MAX_BEARERS + 1]; +struct tipc_bearer __rcu *bearer_list[MAX_BEARERS + 1]; static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down); @@ -178,7 +178,7 @@ struct tipc_bearer *tipc_bearer_find(const char *name) u32 i; for (i = 0; i < MAX_BEARERS; i++) { - b_ptr = bearer_list[i]; + b_ptr = rtnl_dereference(bearer_list[i]); if (b_ptr && (!strcmp(b_ptr->name, name))) return b_ptr; } @@ -201,7 +201,7 @@ struct sk_buff *tipc_bearer_get_names(void) read_lock_bh(&tipc_net_lock); for (i = 0; media_info_array[i] != NULL; i++) { for (j = 0; j < MAX_BEARERS; j++) { - b = bearer_list[j]; + b = rtnl_dereference(bearer_list[j]); if (!b) continue; if (b->media == media_info_array[i]) { @@ -287,7 +287,7 @@ restart: bearer_id = MAX_BEARERS; with_this_prio = 1; for (i = MAX_BEARERS; i-- != 0; ) { - b_ptr = bearer_list[i]; + b_ptr = rtnl_dereference(bearer_list[i]); if (!b_ptr) { bearer_id = i; continue; @@ -344,7 +344,7 @@ restart: goto exit; } - bearer_list[bearer_id] = b_ptr; + rcu_assign_pointer(bearer_list[bearer_id], b_ptr); pr_info("Enabled bearer <%s>, discovery domain %s, priority %u\n", name, @@ -385,12 +385,12 @@ static void bearer_disable(struct tipc_bearer *b_ptr, bool shutting_down) tipc_disc_delete(b_ptr->link_req); for (i = 0; i < MAX_BEARERS; i++) { - if (b_ptr == bearer_list[i]) { - bearer_list[i] = NULL; + if (b_ptr == rtnl_dereference(bearer_list[i])) { + RCU_INIT_POINTER(bearer_list[i], NULL); break; } } - kfree(b_ptr); + kfree_rcu(b_ptr, rcu); } int tipc_disable_bearer(const char *name) @@ -628,7 +628,7 @@ void tipc_bearer_stop(void) u32 i; for (i = 0; i < MAX_BEARERS; i++) { - b_ptr = bearer_list[i]; + b_ptr = rtnl_dereference(bearer_list[i]); if (b_ptr) { bearer_disable(b_ptr, true); bearer_list[i] = NULL; |