NFSv4: Ensure that the NFSv4 locking can recover from stateid errors

In most cases, we just want to mark the lock_stateid sequence id as being
uninitialised.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org
Reviewed-by: Chuck Lever <chuck.lever@oracle.com>

diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 198d51d17c135e1b41564636511ff0119e0a7219..0b68238ed0c86efd65ca7b978d3109d1c8187a0e 100644 (file)
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -4088,6 +4088,22 @@ static const struct rpc_call_ops nfs4_recover_lock_ops = {
        .rpc_release = nfs4_lock_release,
 };
 
+static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
+{
+       struct nfs_client *clp = server->nfs_client;
+       struct nfs4_state *state = lsp->ls_state;
+
+       switch (error) {
+       case -NFS4ERR_ADMIN_REVOKED:
+       case -NFS4ERR_BAD_STATEID:
+       case -NFS4ERR_EXPIRED:
+               if (new_lock_owner != 0 ||
+                  (lsp->ls_flags & NFS_LOCK_INITIALIZED) != 0)
+                       nfs4_state_mark_reclaim_nograce(clp, state);
+               lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
+       };
+}
+
 static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
 {
        struct nfs4_lockdata *data;
@@ -4126,6 +4142,9 @@ static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *f
        ret = nfs4_wait_for_completion_rpc_task(task);
        if (ret == 0) {
                ret = data->rpc_status;
+               if (ret)
+                       nfs4_handle_setlk_error(data->server, data->lsp,
+                                       data->arg.new_lock_owner, ret);
        } else
                data->cancelled = 1;
        rpc_put_task(task);