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author | Bryan Schumaker <bjschuma@netapp.com> | 2012-11-12 16:55:38 -0500 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2013-01-11 09:18:36 -0800 |
commit | 4d436f1d25a6bf4788dfc5eeed043137b47115f3 (patch) | |
tree | 1c9b00b619d33553cf8175c571f52d59f213aeab /fs/gfs2/dentry.c | |
parent | b500eb39c56d89b45c088cba868f20abcfd63cbf (diff) |
NFS: Add sequence_priviliged_ops for nfs4_proc_sequence()
commit 6bdb5f213c4344324f600dde885f25768fbd14db upstream.
If I mount an NFS v4.1 server to a single client multiple times and then
run xfstests over each mountpoint I usually get the client into a state
where recovery deadlocks. The server informs the client of a
cb_path_down sequence error, the client then does a
bind_connection_to_session and checks the status of the lease.
I found that bind_connection_to_session sets the NFS4_SESSION_DRAINING
flag on the client, but this flag is never unset before
nfs4_check_lease() reaches nfs4_proc_sequence(). This causes the client
to deadlock, halting all NFS activity to the server. nfs4_proc_sequence()
is only called by the state manager, so I can change it to run in privileged
mode to bypass the NFS4_SESSION_DRAINING check and avoid the deadlock.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/gfs2/dentry.c')
0 files changed, 0 insertions, 0 deletions