FAILED: patch "[PATCH] nfsd: update mtime/ctime on CLONE in presense of delegated" failed to apply to 6.18-stable tree

The patch below does not apply to the 6.18-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-6.18.y
git checkout FETCH_HEAD
git cherry-pick -x 2863bac7f49c4acd80a048ce52506a2b9c8db015
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026052032-acutely-resize-ed3e@gregkh' --subject-prefix 'PATCH 6.18.y' HEAD^..

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From 2863bac7f49c4acd80a048ce52506a2b9c8db015 Mon Sep 17 00:00:00 2001
From: Olga Kornievskaia <[email protected]>
Date: Fri, 10 Apr 2026 12:09:19 -0400
Subject: [PATCH] nfsd: update mtime/ctime on CLONE in presense of delegated
attributes

When delegated attributes are given on open, the file is opened with NOCMTIME and modifying operations do not update mtime/ctime as to not get out-of-sync with the client's delegated view. However, for CLONE operation, the server should update its view of mtime/ctime and reflect that in any GETATTR queries.

index 2797da8cc950..5de8f37df78a 100644
@@ -1413,6 +1413,9 @@ nfsd4_clone(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 			dst, clone->cl_dst_pos, clone->cl_count,
 			EX_ISSYNC(cstate->current_fh.fh_export));
 
+	if (!status && (READ_ONCE(dst->nf_file->f_mode) & FMODE_NOCMTIME) != 0)
+		nfsd_update_cmtime_attr(dst->nf_file, 0);
+
 	nfsd_file_put(dst);
 	nfsd_file_put(src);
 out:

index 953675eba5c3..c5ccea64c281 100644
@@ -843,6 +843,7 @@ extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
 void nfsd4_put_client(struct nfs4_client *clp);
 void nfsd4_async_copy_reaper(struct nfsd_net *nn);
 bool nfsd4_has_active_async_copies(struct nfs4_client *clp);
+void nfsd_update_cmtime_attr(struct file *f, unsigned int flags);
 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
 				struct xdr_netobj princhash, struct nfsd_net *nn);
 extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);