pNFS/flexfiles: If the layout is invalid, it must be updated before retrying

If we see that our pNFS READ/WRITE/COMMIT operation failed, but we
also see that our layout segment is no longer valid, then we need to
get a new layout segment before retrying.

Fixes: 90816d1ddacf ("NFSv4.1/flexfiles: Don't mark the entire deviceid...")
Cc: stable@vger.kernel.org # v4.2+
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 7b5f37f..78f9a30 100644 (file)
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1053,9 +1053,6 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
        struct nfs_client *mds_client = mds_server->nfs_client;
        struct nfs4_slot_table *tbl = &clp->cl_session->fc_slot_table;
 
-       if (task->tk_status >= 0)
-               return 0;
-
        switch (task->tk_status) {
        /* MDS state errors */
        case -NFS4ERR_DELEG_REVOKED:
@@ -1157,9 +1154,6 @@ static int ff_layout_async_handle_error_v3(struct rpc_task *task,
 {
        struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
 
-       if (task->tk_status >= 0)
-               return 0;
-
        switch (task->tk_status) {
        /* File access problems. Don't mark the device as unavailable */
        case -EACCES:
@@ -1195,6 +1189,13 @@ static int ff_layout_async_handle_error(struct rpc_task *task,
 {
        int vers = clp->cl_nfs_mod->rpc_vers->number;
 
+       if (task->tk_status >= 0)
+               return 0;
+
+       /* Handle the case of an invalid layout segment */
+       if (!pnfs_is_valid_lseg(lseg))
+               return -NFS4ERR_RESET_TO_PNFS;
+
        switch (vers) {
        case 3:
                return ff_layout_async_handle_error_v3(task, lseg, idx);