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| author | Jeff Layton <jlayton@kernel.org> | 2019-04-22 12:34:24 -0400 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2019-04-22 15:38:41 -0400 |
| commit | f456458e4d25a8962d0946891617c76cc3ff5fb9 (patch) | |
| tree | bac517015f1d270e1becc4e53da7a881d205684b /fs/nfsd | |
| parent | 6aaafc43a4ecc5bc8a3f6a2811d5eddc996a97f3 (diff) | |
| download | linux-f456458e4d25a8962d0946891617c76cc3ff5fb9.tar.gz linux-f456458e4d25a8962d0946891617c76cc3ff5fb9.tar.bz2 linux-f456458e4d25a8962d0946891617c76cc3ff5fb9.zip | |
nfsd: wake blocked file lock waiters before sending callback
When a blocked NFS lock is "awoken" we send a callback to the server and
then wake any hosts waiting on it. If a client attempts to get a lock
and then drops off the net, we could end up waiting for a long time
until we end up waking locks blocked on that request.
So, wake any other waiting lock requests before sending the callback.
Do this by calling locks_delete_block in a new "prepare" phase for
CB_NOTIFY_LOCK callbacks.
URL: https://bugzilla.kernel.org/show_bug.cgi?id=203363
Fixes: 16306a61d3b7 ("fs/locks: always delete_block after waiting.")
Reported-by: Slawomir Pryczek <slawek1211@gmail.com>
Cc: Neil Brown <neilb@suse.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfs4state.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c index e87e15df2044..f056b1d3fecd 100644 --- a/fs/nfsd/nfs4state.c +++ b/fs/nfsd/nfs4state.c @@ -298,6 +298,14 @@ remove_blocked_locks(struct nfs4_lockowner *lo) } } +static void +nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb) +{ + struct nfsd4_blocked_lock *nbl = container_of(cb, + struct nfsd4_blocked_lock, nbl_cb); + locks_delete_block(&nbl->nbl_lock); +} + static int nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task) { @@ -325,6 +333,7 @@ nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb) } static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = { + .prepare = nfsd4_cb_notify_lock_prepare, .done = nfsd4_cb_notify_lock_done, .release = nfsd4_cb_notify_lock_release, }; |