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f2fs: flush dirty pages before starting atomic writes 

If somebody wrote some data before atomic writes, we should flush them in order
to handle atomic data in a right period.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2016-04-12 14:36:11 -07:00
parent 63c52d7878
commit c27753d675
1 changed files with 10 additions and 1 deletions
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11
fs/f2fs/file.c
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@ -1369,7 +1369,16 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
return 0;
if (!get_dirty_pages(inode))
return 0;
f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
"Unexpected flush for atomic writes: ino=%lu, npages=%u",
inode->i_ino, get_dirty_pages(inode));
ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
if (ret)
clear_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
return ret;
}
static int f2fs_ioc_commit_atomic_write(struct file *filp)