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| author | Theodore Ts'o <tytso@mit.edu> | 2019-08-24 05:38:00 +0300 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2019-08-24 05:38:00 +0300 |
| commit | c1e8220bd316d8ae8e524df39534b8a412a45d5e (patch) | |
| tree | 4f050baad2461c6a09de2e413164796f069cf7bc /fs/ext4/inode.c | |
| parent | 8fcc3a580651cceb94a9f48e1914491400d5146b (diff) | |
| download | linux-c1e8220bd316d8ae8e524df39534b8a412a45d5e.tar.xz | |
ext4: fix punch hole for inline_data file systems
If a program attempts to punch a hole on an inline data file, we need
to convert it to a normal file first.
This was detected using ext4/032 using the adv configuration. Simple
reproducer:
mke2fs -Fq -t ext4 -O inline_data /dev/vdc
mount /vdc
echo "" > /vdc/testfile
xfs_io -c 'truncate 33554432' /vdc/testfile
xfs_io -c 'fpunch 0 1048576' /vdc/testfile
umount /vdc
e2fsck -fy /dev/vdc
Cc: stable@vger.kernel.org
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2b1c58da8d1e..e567f0229d4e 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4236,6 +4236,15 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length) trace_ext4_punch_hole(inode, offset, length, 0); + ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA); + if (ext4_has_inline_data(inode)) { + down_write(&EXT4_I(inode)->i_mmap_sem); + ret = ext4_convert_inline_data(inode); + up_write(&EXT4_I(inode)->i_mmap_sem); + if (ret) + return ret; + } + /* * Write out all dirty pages to avoid race conditions * Then release them. |