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libceph: lock outside send_queued() 

Two of the three callers of the osd client's send_queued() function
already hold the osd client mutex and drop it before the call.

Change send_queued() so it assumes the caller holds the mutex, and
update all callers accordingly.  Rename it __send_queued() to match
the convention used elsewhere in the file with respect to the lock.

Signed-off-by: Alex Elder <elder@inktank.com>
Reviewed-by: Josh Durgin <josh.durgin@inktank.com>
This commit is contained in:
Alex Elder 2013-02-15 11:42:29 -06:00
parent a3bea47e8b
commit f9d2519945
1 changed files with 9 additions and 10 deletions
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19
net/ceph/osd_client.c
View File

@ -23,7 +23,7 @@
static const struct ceph_connection_operations osd_con_ops;
static void send_queued(struct ceph_osd_client *osdc);
static void __send_queued(struct ceph_osd_client *osdc);
static int __reset_osd(struct ceph_osd_client *osdc, struct ceph_osd *osd);
static void __register_request(struct ceph_osd_client *osdc,
struct ceph_osd_request *req);
@ -554,8 +554,8 @@ static void osd_reset(struct ceph_connection *con)
down_read(&osdc->map_sem);
mutex_lock(&osdc->request_mutex);
__kick_osd_requests(osdc, osd);
__send_queued(osdc);
mutex_unlock(&osdc->request_mutex);
send_queued(osdc);
up_read(&osdc->map_sem);
}
@ -997,16 +997,13 @@ static void __send_request(struct ceph_osd_client *osdc,
/*
* Send any requests in the queue (req_unsent).
*/
static void send_queued(struct ceph_osd_client *osdc)
static void __send_queued(struct ceph_osd_client *osdc)
{
struct ceph_osd_request *req, *tmp;
dout("send_queued\n");
mutex_lock(&osdc->request_mutex);
list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item) {
dout("__send_queued\n");
list_for_each_entry_safe(req, tmp, &osdc->req_unsent, r_req_lru_item)
__send_request(osdc, req);
}
mutex_unlock(&osdc->request_mutex);
}
/*
@ -1058,8 +1055,8 @@ static void handle_timeout(struct work_struct *work)
}
__schedule_osd_timeout(osdc);
__send_queued(osdc);
mutex_unlock(&osdc->request_mutex);
send_queued(osdc);
up_read(&osdc->map_sem);
}
@ -1397,7 +1394,9 @@ done:
if (ceph_osdmap_flag(osdc->osdmap, CEPH_OSDMAP_FULL))
ceph_monc_request_next_osdmap(&osdc->client->monc);
send_queued(osdc);
mutex_lock(&osdc->request_mutex);
__send_queued(osdc);
mutex_unlock(&osdc->request_mutex);
up_read(&osdc->map_sem);
wake_up_all(&osdc->client->auth_wq);
return;