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authorAlex Elder <elder@inktank.com>2012-12-07 19:50:07 -0600
committerAlex Elder <elder@inktank.com>2012-12-17 12:07:32 -0600
commit7bb21d68c535ad8be38e14a715632ae398b37ac1 (patch)
tree81a2f47b32640921f0f7ce90b93ef450b4ca599a /net
parentb8f5c6edca34ff441e1ccdec68828e933a1b905b (diff)
libceph: socket can close in any connection state
A connection's socket can close for any reason, independent of the state of the connection (and without irrespective of the connection mutex). As a result, the connectino can be in pretty much any state at the time its socket is closed. Handle those other cases at the top of con_work(). Pull this whole block of code into a separate function to reduce the clutter. Signed-off-by: Alex Elder <elder@inktank.com> Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'net')
-rw-r--r--net/ceph/messenger.c47
1 files changed, 30 insertions, 17 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c
index 1041114453db..4b04ccc60db1 100644
--- a/net/ceph/messenger.c
+++ b/net/ceph/messenger.c
@@ -2273,6 +2273,35 @@ static void queue_con(struct ceph_connection *con)
(void) queue_con_delay(con, 0);
}
+static bool con_sock_closed(struct ceph_connection *con)
+{
+ if (!test_and_clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags))
+ return false;
+
+#define CASE(x) \
+ case CON_STATE_ ## x: \
+ con->error_msg = "socket closed (con state " #x ")"; \
+ break;
+
+ switch (con->state) {
+ CASE(CLOSED);
+ CASE(PREOPEN);
+ CASE(CONNECTING);
+ CASE(NEGOTIATING);
+ CASE(OPEN);
+ CASE(STANDBY);
+ default:
+ pr_warning("%s con %p unrecognized state %lu\n",
+ __func__, con, con->state);
+ con->error_msg = "unrecognized con state";
+ BUG();
+ break;
+ }
+#undef CASE
+
+ return true;
+}
+
/*
* Do some work on a connection. Drop a connection ref when we're done.
*/
@@ -2284,24 +2313,8 @@ static void con_work(struct work_struct *work)
mutex_lock(&con->mutex);
restart:
- if (test_and_clear_bit(CON_FLAG_SOCK_CLOSED, &con->flags)) {
- switch (con->state) {
- case CON_STATE_CONNECTING:
- con->error_msg = "connection failed";
- break;
- case CON_STATE_NEGOTIATING:
- con->error_msg = "negotiation failed";
- break;
- case CON_STATE_OPEN:
- con->error_msg = "socket closed";
- break;
- default:
- dout("unrecognized con state %d\n", (int)con->state);
- con->error_msg = "unrecognized con state";
- BUG();
- }
+ if (con_sock_closed(con))
goto fault;
- }
if (test_and_clear_bit(CON_FLAG_BACKOFF, &con->flags)) {
dout("con_work %p backing off\n", con);