FAILED: Patch "xfs: mark data structures corrupt on EIO and ENODATA" failed to apply to 6.6-stable tree

The patch below does not apply to the 6.6-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]>.

Thanks,
Sasha

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

From f39854a3fb2f06dc69b81ada002b641ba5b4696b Mon Sep 17 00:00:00 2001
From: "Darrick J. Wong" <[email protected]>
Date: Thu, 18 Dec 2025 18:40:50 -0800
Subject: [PATCH] xfs: mark data structures corrupt on EIO and ENODATA

I learned a few things this year: first, blk_status_to_errno can return ENODATA for critical media errors; and second, the scrub code doesn't mark data structures as corrupt on ENODATA or EIO.

Currently, scrub failing to capture these errors isn't all that impactful -- the checking code will exit to userspace with EIO/ENODATA, and xfs_scrub will log a complaint and exit with nonzero status. Most people treat fsck tools failing as a sign that the fs is corrupt, but online fsck should mark the metadata bad and keep moving.

---
 fs/xfs/scrub/btree.c   | 2 ++
 fs/xfs/scrub/common.c  | 4 ++++
 fs/xfs/scrub/dabtree.c | 2 ++
 3 files changed, 8 insertions(+)

index 8ba004979862f..40f36db9f07d5 100644
@@ -42,6 +42,8 @@ __xchk_btree_process_error(
 		break;
 	case -EFSBADCRC:
 	case -EFSCORRUPTED:
+	case -EIO:
+	case -ENODATA:
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= errflag;
 		*error = 0;

index 38d0b7d5c894b..affed35a8c96f 100644
@@ -103,6 +103,8 @@ __xchk_process_error(
 		break;
 	case -EFSBADCRC:
 	case -EFSCORRUPTED:
+	case -EIO:
+	case -ENODATA:
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= errflag;
 		*error = 0;

@@ -177,6 +179,8 @@ __xchk_fblock_process_error(
 		break;
 	case -EFSBADCRC:
 	case -EFSCORRUPTED:
+	case -EIO:
+	case -ENODATA:
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= errflag;
 		*error = 0;

index dd14f355358ca..5858d4d5e279b 100644
@@ -45,6 +45,8 @@ xchk_da_process_error(
 		break;
 	case -EFSBADCRC:
 	case -EFSCORRUPTED:
+	case -EIO:
+	case -ENODATA:
 		/* Note the badness but don't abort. */
 		sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
 		*error = 0;

2.51.0