+ ocfs2-abstract-the-chain-list-dinode-guard-and-count-check.patch added to mm-nonmm-unstable branch

[Andrew Morton <akpm@linux-foundation.org>]

The patch titled
     Subject: ocfs2: abstract the chain list dinode guard and count check
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     ocfs2-abstract-the-chain-list-dinode-guard-and-count-check.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-abstract-the-chain-list-dinode-guard-and-count-check.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/process/submit-checklist.rst when testing your code ***

The -mm tree is included into linux-next via various
branches at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
and is updated there most days

------------------------------------------------------
From: Joseph Qi <joseph.qi@linux.alibaba.com>
Subject: ocfs2: abstract the chain list dinode guard and count check
Date: Mon, 09 Nov 2026 20:21:05 +0800

Introduce ocfs2_dinode_has_chain_list() for the OCFS2_CHAIN_FL test that
selects the id2.i_chain union arm, and ocfs2_dinode_has_bad_chain_count()
for the cl_count against ocfs2_chain_recs_per_inode() test.

This mirrors the guard predicates already used for the inline-data and
fast symlink groups, and ocfs2_dinode_has_extents() for the extent list
group.

No functional change intended.

Link: https://lore.kernel.org/20261109122121.21473-16-joseph.qi@linux.alibaba.com
Signed-off-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Heming Zhao <heming.zhao@suse.com>
Cc: Mark Fasheh <mark@fasheh.com>
Cc: Joel Becker <jlbec@evilplan.org>
---

 fs/ocfs2/inode.c |   16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

--- a/fs/ocfs2/inode.c~ocfs2-abstract-the-chain-list-dinode-guard-and-count-check
+++ a/fs/ocfs2/inode.c
@@ -226,6 +226,18 @@ static bool ocfs2_dinode_has_unterminate
 	return strnlen((char *)di->id2.i_symlink, i_size + 1) != i_size;
 }
 
+static bool ocfs2_dinode_has_chain_list(struct ocfs2_dinode *di)
+{
+	return le32_to_cpu(di->i_flags) & OCFS2_CHAIN_FL;
+}
+
+static bool ocfs2_dinode_has_bad_chain_count(struct super_block *sb,
+					     struct ocfs2_dinode *di)
+{
+	return le16_to_cpu(di->id2.i_chain.cl_count) !=
+		ocfs2_chain_recs_per_inode(sb);
+}
+
 void ocfs2_set_inode_flags(struct inode *inode)
 {
 	unsigned int flags = OCFS2_I(inode)->ip_attr;
@@ -1840,12 +1852,12 @@ int ocfs2_validate_inode_block(struct su
 		}
 	}
 
-	if (le32_to_cpu(di->i_flags) & OCFS2_CHAIN_FL) {
+	if (ocfs2_dinode_has_chain_list(di)) {
 		struct ocfs2_chain_list *cl = &di->id2.i_chain;
 		u16 bpc = 1 << (OCFS2_SB(sb)->s_clustersize_bits -
 				sb->s_blocksize_bits);
 
-		if (le16_to_cpu(cl->cl_count) != ocfs2_chain_recs_per_inode(sb)) {
+		if (ocfs2_dinode_has_bad_chain_count(sb, di)) {
 			rc = ocfs2_error(sb, "Invalid dinode %llu: chain list count %u\n",
 					 (unsigned long long)bh->b_blocknr,
 					 le16_to_cpu(cl->cl_count));
_

Patches currently in -mm which might be from joseph.qi@linux.alibaba.com are

ocfs2-exempt-orphaned-dinodes-from-the-zero-nlink-check.patch
ocfs2-abstract-the-zero-nlink-or-mode-dinode-check.patch
ocfs2-abstract-the-dinode-i_blkno-mismatch-check.patch
ocfs2-abstract-the-dinode-ocfs2_valid_fl-check.patch
ocfs2-abstract-the-dinode-fs_generation-mismatch-check.patch
ocfs2-abstract-the-dinode-suballoc-slot-checks.patch
ocfs2-abstract-the-dinode-suballoc-bit-check.patch
ocfs2-abstract-the-dinode-orphaned-slot-check.patch
ocfs2-abstract-the-dinode-dio-orphaned-slot-check.patch
ocfs2-abstract-the-inline-data-dinode-guard-and-cluster-check.patch
ocfs2-abstract-the-inline-data-id_count-bound-check.patch
ocfs2-abstract-the-inline-data-i_size-bound-check.patch
ocfs2-abstract-the-fast-symlink-dinode-guard-and-size-check.patch
ocfs2-abstract-the-fast-symlink-nul-termination-check.patch
ocfs2-abstract-the-chain-list-dinode-guard-and-count-check.patch
ocfs2-abstract-the-chain-list-next-free-record-check.patch
ocfs2-abstract-the-chain-list-bits-per-cluster-check.patch
ocfs2-abstract-the-dinode-refcount-location-check.patch
ocfs2-abstract-the-zero-extent-list-count-check.patch
ocfs2-abstract-the-oversized-extent-list-count-check.patch
ocfs2-abstract-the-extent-list-next-free-record-check.patch
ocfs2-report-unrepairable-corruption-from-online-filecheck-fix.patch
ocfs2-check-dinode-nlink-and-mode-in-online-filecheck.patch
ocfs2-check-dinode-suballoc-slot-in-online-filecheck.patch
ocfs2-check-dinode-suballoc-bit-in-online-filecheck.patch
ocfs2-check-dinode-orphaned-slots-in-online-filecheck.patch
ocfs2-check-inline-data-dinodes-in-online-filecheck.patch
ocfs2-check-fast-symlink-dinodes-in-online-filecheck.patch
ocfs2-check-chain-list-dinodes-in-online-filecheck.patch
ocfs2-check-dinode-refcount-location-in-online-filecheck.patch
ocfs2-check-extent-list-dinodes-in-online-filecheck.patch