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| author | Namjae Jeon <namjae.jeon@samsung.com> | 2014-04-11 04:58:20 +0200 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2014-04-11 04:58:20 +0200 |
| commit | 1ce01c4a199c50b023802be25261c0c02b2f0214 (patch) | |
| tree | 9a1a94b6b27bf3e959d628552377169240d148ac /fs | |
| parent | ext4: update PF_MEMALLOC handling in ext4_write_inode() (diff) | |
| download | linux-1ce01c4a199c50b023802be25261c0c02b2f0214.tar.xz linux-1ce01c4a199c50b023802be25261c0c02b2f0214.zip | |
ext4: fix COLLAPSE_RANGE test failure in data journalling mode
When mounting ext4 with data=journal option, xfstest shared/002 and
shared/004 are currently failing as checksum computed for testfile
does not match with the checksum computed in other journal modes.
In case of data=journal mode, a call to filemap_write_and_wait_range
will not flush anything to disk as buffers are not marked dirty in
write_end. In collapse range this call is followed by a call to
truncate_pagecache_range. Due to this, when checksum is computed,
a portion of file is re-read from disk which replace valid data with
NULL bytes and hence the reason for the difference in checksum.
Calling ext4_force_commit before filemap_write_and_wait_range solves
the issue as it will mark the buffers dirty during commit transaction
which can be later synced by a call to filemap_write_and_wait_range.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/extents.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 82df3ce9874a..be1e56cbbf32 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -5383,6 +5383,13 @@ int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len) punch_start = offset >> EXT4_BLOCK_SIZE_BITS(sb); punch_stop = (offset + len) >> EXT4_BLOCK_SIZE_BITS(sb); + /* Call ext4_force_commit to flush all data in case of data=journal. */ + if (ext4_should_journal_data(inode)) { + ret = ext4_force_commit(inode->i_sb); + if (ret) + return ret; + } + /* Write out all dirty pages */ ret = filemap_write_and_wait_range(inode->i_mapping, offset, -1); if (ret) |