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| author | Sage Weil <sage@inktank.com> | 2012-07-31 03:16:56 +0200 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2012-07-31 03:16:56 +0200 |
| commit | 7b862e07b1a4d5c963d19027f10ea78085f27f9b (patch) | |
| tree | 003d412e6ebfd50f03cabd0bc82aa3916d3bbd06 | |
| parent | libceph: revoke mon_client messages on session restart (diff) | |
| download | linux-7b862e07b1a4d5c963d19027f10ea78085f27f9b.tar.xz linux-7b862e07b1a4d5c963d19027f10ea78085f27f9b.zip | |
libceph: verify state after retaking con lock after dispatch
We drop the con mutex when delivering a message. When we retake the
lock, we need to verify we are still in the OPEN state before
preparing to read the next tag, or else we risk stepping on a
connection that has been closed.
Signed-off-by: Sage Weil <sage@inktank.com>
Reviewed-by: Alex Elder <elder@inktank.com>
| -rw-r--r-- | net/ceph/messenger.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ceph/messenger.c b/net/ceph/messenger.c index a6a0c7a0a979..feb5a2ac724c 100644 --- a/net/ceph/messenger.c +++ b/net/ceph/messenger.c @@ -2003,7 +2003,6 @@ static void process_message(struct ceph_connection *con) con->ops->dispatch(con, msg); mutex_lock(&con->mutex); - prepare_read_tag(con); } @@ -2213,6 +2212,8 @@ more: if (con->in_tag == CEPH_MSGR_TAG_READY) goto more; process_message(con); + if (con->state == CON_STATE_OPEN) + prepare_read_tag(con); goto more; } if (con->in_tag == CEPH_MSGR_TAG_ACK) { |