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ceph: revoke osd request message on request completion 

If an osd has failed or returned and a request has been sent twice, it's
possible to get a reply and unregister the request while the request
message is queued for delivery.  Since the message references the caller's
page vector, we need to revoke it before completing.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2009-10-08 16:57:16 -07:00
parent c1ea8823be
commit 0ba6478df7
1 changed files with 9 additions and 4 deletions
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13
fs/ceph/osd_client.c
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@ -469,10 +469,15 @@ static void __unregister_request(struct ceph_osd_client *osdc,
rb_erase(&req->r_node, &osdc->requests);
osdc->num_requests--;
list_del_init(&req->r_osd_item);
if (list_empty(&req->r_osd->o_requests))
remove_osd(osdc, req->r_osd);
req->r_osd = NULL;
if (req->r_osd) {
/* make sure the original request isn't in flight. */
ceph_con_revoke(&req->r_osd->o_con, req->r_request);
list_del_init(&req->r_osd_item);
if (list_empty(&req->r_osd->o_requests))
remove_osd(osdc, req->r_osd);
req->r_osd = NULL;
}
ceph_osdc_put_request(req);