NFSv4: Retry LOCK on OLD_STATEID during delegation return

[ Upstream commit f5ea16137a ]

There's a small window where a LOCK sent during a delegation return can
race with another OPEN on client, but the open stateid has not yet been
updated.  In this case, the client doesn't handle the OLD_STATEID error
from the server and will lose this lock, emitting:
"NFS: nfs4_handle_delegation_recall_error: unhandled error -10024".

Fix this by sending the task through the nfs4 error handling in
nfs4_lock_done() when we may have to reconcile our stateid with what the
server believes it to be.  For this case, the result is a retry of the
LOCK operation with the updated stateid.

Reported-by: Gonzalo Siero Humet <gsierohu@redhat.com>
Signed-off-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Benjamin Coddington 2022-10-19 12:09:18 -04:00 коммит произвёл Greg Kroah-Hartman
Родитель 49ca2227c4
Коммит 8a03a4a5cf
1 изменённых файлов: 4 добавлений и 2 удалений

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@ -7118,6 +7118,7 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
{
struct nfs4_lockdata *data = calldata;
struct nfs4_lock_state *lsp = data->lsp;
struct nfs_server *server = NFS_SERVER(d_inode(data->ctx->dentry));
dprintk("%s: begin!\n", __func__);
@ -7127,8 +7128,7 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
data->rpc_status = task->tk_status;
switch (task->tk_status) {
case 0:
renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
data->timestamp);
renew_lease(server, data->timestamp);
if (data->arg.new_lock && !data->cancelled) {
data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0)
@ -7149,6 +7149,8 @@ static void nfs4_lock_done(struct rpc_task *task, void *calldata)
if (!nfs4_stateid_match(&data->arg.open_stateid,
&lsp->ls_state->open_stateid))
goto out_restart;
else if (nfs4_async_handle_error(task, server, lsp->ls_state, NULL) == -EAGAIN)
goto out_restart;
} else if (!nfs4_stateid_match(&data->arg.lock_stateid,
&lsp->ls_stateid))
goto out_restart;