nfs41: call free slot from nfs4_restart_rpc
nfs41_sequence_free_slot can be called multiple times on SEQUENCE operation
errors.
No reason to inline nfs4_restart_rpc
Reported-by: Trond Myklebust <trond.myklebust@netapp.com>
nfs_writeback_done and nfs_readpage_retry call nfs4_restart_rpc outside the
error handler, and the slot is not freed prior to restarting in the rpc_prepare
state during session reset.
Fix this by moving the call to nfs41_sequence_free_slot from the error
path of nfs41_sequence_done into nfs4_restart_rpc, and by removing the test
for NFS4CLNT_SESSION_SETUP.
Always free slot and goto the rpc prepare state on async errors.
Signed-off-by: Andy Adamson <andros@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index a23110d..6ef50aa 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -644,6 +644,19 @@
#endif /* CONFIG_NFS_V4_1 */
}
+void nfs4_restart_rpc(struct rpc_task *task, const struct nfs_client *clp,
+ struct nfs4_sequence_res *res)
+{
+#ifdef CONFIG_NFS_V4_1
+ if (nfs4_has_session(clp)) {
+ nfs41_sequence_free_slot(clp, res);
+ rpc_restart_call_prepare(task);
+ return;
+ }
+#endif /* CONFIG_NFS_V4_1 */
+ rpc_restart_call(task);
+}
+
/* no restart, therefore free slot here */
static void nfs4_sequence_done_free_slot(const struct nfs_server *server,
struct nfs4_sequence_res *res,
@@ -1750,7 +1763,8 @@
break;
default:
if (nfs4_async_handle_error(task, server, state) == -EAGAIN) {
- nfs4_restart_rpc(task, server->nfs_client);
+ nfs4_restart_rpc(task, server->nfs_client,
+ &calldata->res.seq_res);
return;
}
}
@@ -2988,7 +3002,7 @@
nfs4_sequence_done(server, &data->res.seq_res, task->tk_status);
if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
- nfs4_restart_rpc(task, server->nfs_client);
+ nfs4_restart_rpc(task, server->nfs_client, &data->res.seq_res);
return -EAGAIN;
}
@@ -3013,7 +3027,8 @@
task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
- nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
+ nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
+ &data->res.seq_res);
return -EAGAIN;
}
if (task->tk_status >= 0) {
@@ -3041,7 +3056,8 @@
nfs4_sequence_done(NFS_SERVER(inode), &data->res.seq_res,
task->tk_status);
if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
- nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client);
+ nfs4_restart_rpc(task, NFS_SERVER(inode)->nfs_client,
+ &data->res.seq_res);
return -EAGAIN;
}
nfs4_sequence_free_slot(NFS_SERVER(inode)->nfs_client,
@@ -3755,7 +3771,8 @@
default:
if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
nfs4_restart_rpc(task,
- calldata->server->nfs_client);
+ calldata->server->nfs_client,
+ &calldata->res.seq_res);
}
nfs4_sequence_free_slot(calldata->server->nfs_client,
&calldata->res.seq_res);
@@ -4890,7 +4907,7 @@
if (_nfs4_async_handle_error(task, NULL, clp, NULL)
== -EAGAIN) {
- nfs4_restart_rpc(task, clp);
+ nfs4_restart_rpc(task, clp, task->tk_msg.rpc_resp);
return;
}
}