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nfs4: wake any lock waiters on successful RECLAIM_COMPLETE 

If we have a RECLAIM_COMPLETE with a populated cl_lock_waitq, then
that implies that a reconnect has occurred. Since we can't expect a
CB_NOTIFY_LOCK callback at that point, just wake up the entire queue
so that all the tasks can re-poll for their locks.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
This commit is contained in:
Jeff Layton 2018-03-18 08:37:03 -04:00 committed by Anna Schumaker
parent 5656610325
commit 571745935b
1 changed files with 16 additions and 10 deletions
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26
fs/nfs/nfs4proc.c
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@ -6621,20 +6621,24 @@ static int
nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
{
int ret;
struct cb_notify_lock_args *cbnl = key;
struct nfs4_lock_waiter *waiter = wait->private;
struct nfs_lowner *lowner = &cbnl->cbnl_owner,
*wowner = waiter->owner;
/* Only wake if the callback was for the same owner. */
if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
return 0;
/* NULL key means to wake up everyone */
if (key) {
struct cb_notify_lock_args *cbnl = key;
struct nfs_lowner *lowner = &cbnl->cbnl_owner,
*wowner = waiter->owner;
/* Make sure it's for the right inode */
if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
return 0;
/* Only wake if the callback was for the same owner. */
if (lowner->id != wowner->id || lowner->s_dev != wowner->s_dev)
return 0;
waiter->notified = true;
/* Make sure it's for the right inode */
if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
return 0;
waiter->notified = true;
}
/* override "private" so we can use default_wake_function */
wait->private = waiter->task;
@ -8413,6 +8417,8 @@ static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nf
{
switch(task->tk_status) {
case 0:
wake_up_all(&clp->cl_lock_waitq);
/* Fallthrough */
case -NFS4ERR_COMPLETE_ALREADY:
case -NFS4ERR_WRONG_CRED: /* What to do here? */
break;