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authorNamjae Jeon <namjae.jeon@samsung.com>2014-04-10 22:58:20 -0400
committerTheodore Ts'o <tytso@mit.edu>2014-04-10 22:58:20 -0400
commit1ce01c4a199c50b023802be25261c0c02b2f0214 (patch)
tree9a1a94b6b27bf3e959d628552377169240d148ac /fs
parent87f7e41636ff201148443551d06bc74497160aac (diff)
downloadop-kernel-dev-1ce01c4a199c50b023802be25261c0c02b2f0214.zip
op-kernel-dev-1ce01c4a199c50b023802be25261c0c02b2f0214.tar.gz
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.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 82df3ce..be1e56c 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)
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