From 9725958bb75cdfa10f2ec11526fdb23e7485e8e4 Mon Sep 17 00:00:00 2001
From: Xin Yin <yinxin.x@bytedance.com>
Date: Thu, 23 Dec 2021 11:23:37 +0800
Subject: [PATCH] ext4: fast commit may miss tracking unwritten range during
ftruncate
Git-commit: 9725958bb75cdfa10f2ec11526fdb23e7485e8e4
Patch-mainline: v5.17-rc1
References: bsc#1202759
If use FALLOC_FL_KEEP_SIZE to alloc unwritten range at bottom, the
inode->i_size will not include the unwritten range. When call
ftruncate with fast commit enabled, it will miss to track the
unwritten range.
Change to trace the full range during ftruncate.
Signed-off-by: Xin Yin <yinxin.x@bytedance.com>
Reviewed-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20211223032337.5198-3-yinxin.x@bytedance.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: stable@kernel.org
Acked-by: Jan Kara <jack@suse.cz>
---
fs/ext4/inode.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 4895909de21b..08a90e25b78b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -5424,8 +5424,7 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
ext4_fc_track_range(handle, inode,
(attr->ia_size > 0 ? attr->ia_size - 1 : 0) >>
inode->i_sb->s_blocksize_bits,
- (oldsize > 0 ? oldsize - 1 : 0) >>
- inode->i_sb->s_blocksize_bits);
+ EXT_MAX_BLOCKS - 1);
else
ext4_fc_track_range(
handle, inode,
--
2.35.3