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| author | Sage Weil <sage@newdream.net> | 2011-03-25 21:27:48 +0100 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-03-25 21:27:48 +0100 |
| commit | ef550f6f4f6c9345a27ec85d98f4f7de1adce79c (patch) | |
| tree | dafd71f3e7fe46ed685b5ab3fd62c2bb7d3cb679 | |
| parent | rbd: use watch/notify for changes in rbd header (diff) | |
| download | linux-ef550f6f4f6c9345a27ec85d98f4f7de1adce79c.tar.xz linux-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Also fix an outdated comment: the flush in ceph_destroy_client only flushes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>
| -rw-r--r-- | fs/ceph/mds_client.c | 6 | ||||
| -rw-r--r-- | net/ceph/ceph_common.c | 4 |
2 files changed, 8 insertions, 2 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); } diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c index 95f96ab94bba..9bbb356b12e7 100644 --- a/net/ceph/ceph_common.c +++ b/net/ceph/ceph_common.c @@ -394,8 +394,8 @@ void ceph_destroy_client(struct ceph_client *client) ceph_osdc_stop(&client->osdc); /* - * make sure mds and osd connections close out before destroying - * the auth module, which is needed to free those connections' + * make sure osd connections close out before destroying the + * auth module, which is needed to free those connections' * ceph_authorizers. */ ceph_msgr_flush(); |