tipc: Simplify bearer shutdown logic
Optimize processing in TIPC's bearer shutdown code, including: 1. Remove an unnecessary check to see if TIPC bearer's can exist. 2. Don't release spinlocks before calling a media-specific disabling routine, since the routine can't sleep. 3. Make bearer_disable() operate directly on a struct bearer, instead of needlessly taking a name and then mapping that to the struct. Signed-off-by: Allan Stephens <allan.stephens@windriver.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Reviewed-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -288,9 +288,6 @@ static struct bearer *bearer_find(const char *name)
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struct bearer *b_ptr;
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u32 i;
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if (tipc_mode != TIPC_NET_MODE)
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return NULL;
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for (i = 0, b_ptr = tipc_bearers; i < MAX_BEARERS; i++, b_ptr++) {
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if (b_ptr->active && (!strcmp(b_ptr->publ.name, name)))
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return b_ptr;
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@ -630,30 +627,17 @@ int tipc_block_bearer(const char *name)
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* Note: This routine assumes caller holds tipc_net_lock.
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*/
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static int bearer_disable(const char *name)
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static int bearer_disable(struct bearer *b_ptr)
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{
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struct bearer *b_ptr;
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struct link *l_ptr;
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struct link *temp_l_ptr;
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b_ptr = bearer_find(name);
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if (!b_ptr) {
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warn("Attempt to disable unknown bearer <%s>\n", name);
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return -EINVAL;
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}
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info("Disabling bearer <%s>\n", name);
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info("Disabling bearer <%s>\n", b_ptr->publ.name);
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tipc_disc_stop_link_req(b_ptr->link_req);
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spin_lock_bh(&b_ptr->publ.lock);
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b_ptr->link_req = NULL;
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b_ptr->publ.blocked = 1;
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if (b_ptr->media->disable_bearer) {
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spin_unlock_bh(&b_ptr->publ.lock);
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write_unlock_bh(&tipc_net_lock);
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b_ptr->media->disable_bearer(&b_ptr->publ);
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write_lock_bh(&tipc_net_lock);
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spin_lock_bh(&b_ptr->publ.lock);
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}
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b_ptr->media->disable_bearer(&b_ptr->publ);
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list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) {
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tipc_link_delete(l_ptr);
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}
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@ -664,10 +648,16 @@ static int bearer_disable(const char *name)
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int tipc_disable_bearer(const char *name)
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{
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struct bearer *b_ptr;
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int res;
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write_lock_bh(&tipc_net_lock);
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res = bearer_disable(name);
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b_ptr = bearer_find(name);
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if (b_ptr == NULL) {
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warn("Attempt to disable unknown bearer <%s>\n", name);
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res = -EINVAL;
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} else
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res = bearer_disable(b_ptr);
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write_unlock_bh(&tipc_net_lock);
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return res;
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}
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@ -680,13 +670,7 @@ void tipc_bearer_stop(void)
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for (i = 0; i < MAX_BEARERS; i++) {
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if (tipc_bearers[i].active)
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tipc_bearers[i].publ.blocked = 1;
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}
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for (i = 0; i < MAX_BEARERS; i++) {
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if (tipc_bearers[i].active)
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bearer_disable(tipc_bearers[i].publ.name);
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bearer_disable(&tipc_bearers[i]);
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}
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media_count = 0;
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}
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