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ext4: Check if inode uses extents in ext4_inode_can_atomic_write()

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EXT4 only supports doing atomic write on inodes which uses extents, so
add a check in ext4_inode_can_atomic_write() which gets called during
open.

Reviewed-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Acked-by: Darrick J. Wong <djwong@kernel.org>
Signed-off-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
Link: https://patch.msgid.link/86bb502c979398a736ab371d8f35f6866a477f6c.1747337952.git.ritesh.list@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Ritesh Harjani (IBM) 2025-05-16 01:20:50 +05:30 committed by Theodore Ts'o
parent 9fa6121684
commit 1c972b1d13
1 changed files with 3 additions and 1 deletions
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4
fs/ext4/ext4.h
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@ -3870,7 +3870,9 @@ static inline int ext4_buffer_uptodate(struct buffer_head *bh)
static inline bool ext4_inode_can_atomic_write(struct inode *inode)
{
return S_ISREG(inode->i_mode) && EXT4_SB(inode->i_sb)->s_awu_min > 0;
return S_ISREG(inode->i_mode) &&
ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS) &&
EXT4_SB(inode->i_sb)->s_awu_min > 0;
}
extern int ext4_block_write_begin(handle_t *handle, struct folio *folio,