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@xxxxxxxxxx>
---
net/ceph/osd_client.c | 1 +
1 file changed, 1 insertion(+)
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;
}
--
1.7.10.4
--
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