From: Trond Myklebust <trond.myklebust@hammerspace.com>

Date: Tue, 31 May 2022 11:03:06 -0400

Subject: [PATCH] pNFS: Don't keep retrying if the server replied

 NFS4ERR_LAYOUTUNAVAILABLE

Git-commit: fe44fb23d6ccde4c914c44ef74ab8d9d9ba02bea

Patch-mainline: v5.19

References: git-fixes

If the server tells us that a pNFS layout is not available for a

specific file, then we should not keep pounding it with further

layoutget requests.

Fixes: 183d9e7b112a ("pnfs: rework LAYOUTGET retry handling")

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>

Acked-by: NeilBrown <neilb@suse.com>

---

 fs/nfs/pnfs.c |    6 ++++++

 1 file changed, 6 insertions(+)

--- a/fs/nfs/pnfs.c

+++ b/fs/nfs/pnfs.c

@@ -1915,6 +1915,12 @@ lookup_again:

 			/* Fallthrough */

 		case -EAGAIN:

 			break;

+		case -ENODATA:

+			/* The server returned NFS4ERR_LAYOUTUNAVAILABLE */

+			pnfs_layout_set_fail_bit(

+				lo, pnfs_iomode_to_fail_bit(iomode));

+			lseg = NULL;

+			goto out_put_layout_hdr;

 		default:

 			if (!nfs_error_is_fatal(PTR_ERR(lseg))) {

 				pnfs_layout_clear_fail_bit(lo, pnfs_iomode_to_fail_bit(iomode));