[PATCH 5.15 116/484] ext4: dont track ranges in fast_commit if inode has inlined data

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Luis Henriques (SUSE) <luis.henriques@xxxxxxxxx>

[ Upstream commit 7882b0187bbeb647967a7b5998ce4ad26ef68a9a ]

When fast-commit needs to track ranges, it has to handle inodes that have
inlined data in a different way because ext4_fc_write_inode_data(), in the
actual commit path, will attempt to map the required blocks for the range.
However, inodes that have inlined data will have it's data stored in
inode->i_block and, eventually, in the extended attribute space.

Unfortunately, because fast commit doesn't currently support extended
attributes, the solution is to mark this commit as ineligible.

Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1039883
Signed-off-by: Luis Henriques (SUSE) <luis.henriques@xxxxxxxxx>
Tested-by: Ben Hutchings <benh@xxxxxxxxxx>
Fixes: 9725958bb75c ("ext4: fast commit may miss tracking unwritten range during ftruncate")
Link: https://patch.msgid.link/20240618144312.17786-1-luis.henriques@xxxxxxxxx
Signed-off-by: Theodore Ts'o <tytso@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 fs/ext4/fast_commit.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/fs/ext4/fast_commit.c b/fs/ext4/fast_commit.c
index c6814edf0ce0a..e81b886d9c673 100644
--- a/fs/ext4/fast_commit.c
+++ b/fs/ext4/fast_commit.c
@@ -617,6 +617,12 @@ void ext4_fc_track_range(handle_t *handle, struct inode *inode, ext4_lblk_t star
 	if (ext4_test_mount_flag(inode->i_sb, EXT4_MF_FC_INELIGIBLE))
 		return;
 
+	if (ext4_has_inline_data(inode)) {
+		ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR,
+					handle);
+		return;
+	}
+
 	args.start = start;
 	args.end = end;
 
-- 
2.43.0







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