The patch titled
Subject: [PATCH] ocfs2: always read both high and low parts of dinode link count
has been added to the -mm mm-nonmm-unstable branch. Its filename is
ocfs2-always-read-both-high-and-low-parts-of-dinode-link-count.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/ocfs2-always-read-both-high-and-low-parts-of-dinode-link-count.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Alexey Asemov <alex@xxxxxxxxxxx>
Subject: [PATCH] ocfs2: always read both high and low parts of dinode link count
Date: Sun, 27 Nov 2022 09:46:38 +0300
When filesystem is using indexed-dirs feature, maximum link count values
can spill over to i_links_count_hi, up to OCFS2_DX_LINK_MAX links.
ocfs2_read_links_count() checks for OCFS2_INDEXED_DIR_FL flag in dinode,
but this flag is only valid for directories so for files the check causes
high part of the link count not being read back from file dinodes
resulting in wrong link count value when file has >65535 links.
As ocfs2_set_links_count() always writes both high and low parts of link
count, the flag check on reading may be removed.
Link: https://lkml.kernel.org/r/cbfca02b-b39f-89de-e1a8-904a6c60407e@xxxxxxxxxxx
Signed-off-by: Alexey Asemov <alex@xxxxxxxxxxx>
Reviewed-by: Joseph Qi <joseph.qi@xxxxxxxxxxxxxxxxx>
Cc: Mark Fasheh <mark@xxxxxxxxxx>
Cc: Joel Becker <jlbec@xxxxxxxxxxxx>
Cc: Junxiao Bi <junxiao.bi@xxxxxxxxxx>
Cc: Changwei Ge <gechangwei@xxxxxxx>
Cc: Gang He <ghe@xxxxxxxx>
Cc: Jun Piao <piaojun@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ocfs2/ocfs2.h | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/fs/ocfs2/ocfs2.h~ocfs2-always-read-both-high-and-low-parts-of-dinode-link-count
+++ a/fs/ocfs2/ocfs2.h
@@ -560,8 +560,7 @@ static inline unsigned int ocfs2_read_li
u32 nlink = le16_to_cpu(di->i_links_count);
u32 hi = le16_to_cpu(di->i_links_count_hi);
- if (di->i_dyn_features & cpu_to_le16(OCFS2_INDEXED_DIR_FL))
- nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
+ nlink |= (hi << OCFS2_LINKS_HI_SHIFT);
return nlink;
}
_
Patches currently in -mm which might be from alex@xxxxxxxxxxx are
ocfs2-always-read-both-high-and-low-parts-of-dinode-link-count.patch
