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| author |   Sage Weil <sage@newdream.net> | 2011-03-25 13:27:48 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-03-25 13:27:48 -0700 |
| commit | ef550f6f4f6c9345a27ec85d98f4f7de1adce79c (patch) | |
| tree | dafd71f3e7fe46ed685b5ab3fd62c2bb7d3cb679 /fs/ceph | |
| parent | rbd: use watch/notify for changes in rbd header (diff) | |
| download | linux-dev-ef550f6f4f6c9345a27ec85d98f4f7de1adce79c.tar.xz linux-dev-ef550f6f4f6c9345a27ec85d98f4f7de1adce79c.zip | |
ceph: flush msgr_wq during mds_client shutdown
The release method for mds connections uses a backpointer to the
mds_client, so we need to flush the workqueue of any pending work (and
ceph_connection references) prior to freeing the mds_client. This fixes
an oops easily triggered under UML by
while true ; do mount ... ; umount ... ; done
Also fix an outdated comment: the flush in ceph_destroy_client only flushes
OSD connections out. This bug is basically an artifact of the ceph ->
ceph+libceph conversion.
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/mds_client.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c index a1ee8fa3a8e7..f60b07b0feb0 100644 --- a/fs/ceph/mds_client.c +++ b/fs/ceph/mds_client.c @@ -3215,9 +3215,15 @@ void ceph_mdsc_destroy(struct ceph_fs_client *fsc) { struct ceph_mds_client *mdsc = fsc->mdsc; + dout("mdsc_destroy %p\n", mdsc); ceph_mdsc_stop(mdsc); + + /* flush out any connection work with references to us */ + ceph_msgr_flush(); + fsc->mdsc = NULL; kfree(mdsc); + dout("mdsc_destroy %p done\n", mdsc); } |