[03/12] xfs_repair: junk parent pointer attributes when filesystem doesn't support them

Commit Message

Darrick J. Wong July 30, 2024, 1:26 a.m. UTC

From: Darrick J. Wong <[e-mail]>

Drop a parent pointer xattr if the filesystem doesn't support parent
pointers.

Signed-off-by: Darrick J. Wong <[e-mail]>
Reviewed-by: Christoph Hellwig <[e-mail]>
---
 repair/attr_repair.c |   30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

Patch

diff --git a/repair/attr_repair.c b/repair/attr_repair.c
index 2e97fd977..50159b9a5 100644
--- a/repair/attr_repair.c
+++ b/repair/attr_repair.c
@@ -327,6 +327,13 @@  process_shortform_attr(
 					NULL, currententry->namelen,
 					currententry->valuelen);
 
+		if ((currententry->flags & XFS_ATTR_PARENT) &&
+		    !xfs_has_parent(mp)) {
+			do_warn(
+ _("parent pointer found on filesystem that doesn't support parent pointers\n"));
+			junkit |= 1;
+		}
+
 		remainingspace = remainingspace -
 					xfs_attr_sf_entsize(currententry);
 
@@ -527,6 +534,15 @@  process_leaf_attr_local(
 			return -1;
 		}
 	}
+
+	if ((entry->flags & XFS_ATTR_PARENT) && !xfs_has_parent(mp)) {
+		do_warn(
+ _("parent pointer found in attribute entry %d in attr block %u, inode %"
+   PRIu64 " on filesystem that doesn't support parent pointers\n"),
+				i, da_bno, ino);
+		return -1;
+	}
+
 	return xfs_attr_leaf_entsize_local(local->namelen,
 						be16_to_cpu(local->valuelen));
 }
@@ -562,6 +578,20 @@  process_leaf_attr_remote(
 		return -1;
 	}
 
+	if (entry->flags & XFS_ATTR_PARENT) {
+		if (!xfs_has_parent(mp))
+			do_warn(
+ _("parent pointer found in attribute entry %d in attr block %u, inode %"
+   PRIu64 " on filesystem that doesn't support parent pointers\n"),
+					i, da_bno, ino);
+		else
+			do_warn(
+ _("parent pointer found in attribute entry %d in attr block %u, inode %"
+   PRIu64 " with bogus remote value\n"),
+					i, da_bno, ino);
+		return -1;
+	}
+
 	value = malloc(be32_to_cpu(remotep->valuelen));
 	if (value == NULL) {
 		do_warn(