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[1/3] libceph: unlink from o_linger_requests when clearing r_osd

Message ID 1415208804-10163-2-git-send-email-idryomov@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Ilya Dryomov Nov. 5, 2014, 5:33 p.m. UTC
Requests have to be unlinked from both osd->o_requests (normal
requests) and osd->o_linger_requests (linger requests) lists when
clearing req->r_osd.  Otherwise __unregister_linger_request() gets
confused and we trip over a !list_empty(&osd->o_linger_requests)
assert in __remove_osd().

Reproducer, MON=1 OSD=1:

    # cat remove-osd.sh
    #!/bin/bash
    rbd create --size 1 test
    DEV=$(rbd map test)
    ceph osd out 0
    sleep 3
    rbd map bar/b # obtain a new osdmap as a side effect
    rbd unmap $DEV & # will block
    sleep 3
    ceph osd in 0

Signed-off-by: Ilya Dryomov <idryomov@redhat.com>
---
 net/ceph/osd_client.c |    1 +
 1 file changed, 1 insertion(+)
diff mbox

Patch

diff --git a/net/ceph/osd_client.c b/net/ceph/osd_client.c
index 5a75395fe0ff..ce09da2cf32b 100644
--- a/net/ceph/osd_client.c
+++ b/net/ceph/osd_client.c
@@ -1395,6 +1395,7 @@  static int __map_request(struct ceph_osd_client *osdc,
 	if (req->r_osd) {
 		__cancel_request(req);
 		list_del_init(&req->r_osd_item);
+		list_del_init(&req->r_linger_osd_item);
 		req->r_osd = NULL;
 	}