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| author | Lukas Czerner <lczerner@redhat.com> | 2018-05-14 01:28:35 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2018-05-14 01:28:35 +0200 |
| commit | eee597ac931305eff3d3fd1d61d6aae553bc0984 (patch) | |
| tree | 51d56d6f378440437c1134d4983ca05a402c62db /fs/ext4/inode.c | |
| parent | ext4: add verifier check for symlink with append/immutable flags (diff) | |
| download | linux-eee597ac931305eff3d3fd1d61d6aae553bc0984.tar.xz linux-eee597ac931305eff3d3fd1d61d6aae553bc0984.zip | |
ext4: update mtime in ext4_punch_hole even if no blocks are released
Currently in ext4_punch_hole we're going to skip the mtime update if
there are no actual blocks to release. However we've actually modified
the file by zeroing the partial block so the mtime should be updated.
Moreover the sync and datasync handling is skipped as well, which is
also wrong. Fix it.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reported-by: Joe Habermann <joe.habermann@quantum.com>
Cc: <stable@vger.kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | fs/ext4/inode.c | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 9d512fa80d28..58301a697379 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4298,28 +4298,28 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length) EXT4_BLOCK_SIZE_BITS(sb); stop_block = (offset + length) >> EXT4_BLOCK_SIZE_BITS(sb); - /* If there are no blocks to remove, return now */ - if (first_block >= stop_block) - goto out_stop; + /* If there are blocks to remove, do it */ + if (stop_block > first_block) { - down_write(&EXT4_I(inode)->i_data_sem); - ext4_discard_preallocations(inode); + down_write(&EXT4_I(inode)->i_data_sem); + ext4_discard_preallocations(inode); - ret = ext4_es_remove_extent(inode, first_block, - stop_block - first_block); - if (ret) { - up_write(&EXT4_I(inode)->i_data_sem); - goto out_stop; - } + ret = ext4_es_remove_extent(inode, first_block, + stop_block - first_block); + if (ret) { + up_write(&EXT4_I(inode)->i_data_sem); + goto out_stop; + } - if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) - ret = ext4_ext_remove_space(inode, first_block, - stop_block - 1); - else - ret = ext4_ind_remove_space(handle, inode, first_block, - stop_block); + if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS)) + ret = ext4_ext_remove_space(inode, first_block, + stop_block - 1); + else + ret = ext4_ind_remove_space(handle, inode, first_block, + stop_block); - up_write(&EXT4_I(inode)->i_data_sem); + up_write(&EXT4_I(inode)->i_data_sem); + } if (IS_SYNC(inode)) ext4_handle_sync(handle); |