nilfs2: fix missed-sync issue for do_sync_mapping_range()
Chris Mason pointed out that there is a missed sync issue in
nilfs_writepages():
On Wed, 17 Dec 2008 21:52:55 -0500, Chris Mason wrote:
> It looks like nilfs_writepage ignores WB_SYNC_NONE, which is used by
> do_sync_mapping_range().
where WB_SYNC_NONE in do_sync_mapping_range() was replaced with
WB_SYNC_ALL by Nick's patch (commit:
ee53a891f47444c53318b98dac947ede963db400).
This fixes the problem by letting nilfs_writepages() write out the log of
file data within the range if sync_mode is WB_SYNC_ALL.
This involves removal of nilfs_file_aio_write() which was previously
needed to ensure O_SYNC sync writes.
Cc: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/nilfs2/file.c b/fs/nilfs2/file.c
index 8031086..cd38124 100644
--- a/fs/nilfs2/file.c
+++ b/fs/nilfs2/file.c
@@ -44,35 +44,14 @@
return 0;
if (datasync)
- err = nilfs_construct_dsync_segment(inode->i_sb, inode);
+ err = nilfs_construct_dsync_segment(inode->i_sb, inode, 0,
+ LLONG_MAX);
else
err = nilfs_construct_segment(inode->i_sb);
return err;
}
-static ssize_t
-nilfs_file_aio_write(struct kiocb *iocb, const struct iovec *iov,
- unsigned long nr_segs, loff_t pos)
-{
- struct file *file = iocb->ki_filp;
- struct inode *inode = file->f_dentry->d_inode;
- ssize_t ret;
-
- ret = generic_file_aio_write(iocb, iov, nr_segs, pos);
- if (ret <= 0)
- return ret;
-
- if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) {
- int err;
-
- err = nilfs_construct_dsync_segment(inode->i_sb, inode);
- if (unlikely(err))
- return err;
- }
- return ret;
-}
-
static int nilfs_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct page *page = vmf->page;
@@ -160,7 +139,7 @@
.read = do_sync_read,
.write = do_sync_write,
.aio_read = generic_file_aio_read,
- .aio_write = nilfs_file_aio_write,
+ .aio_write = generic_file_aio_write,
.ioctl = nilfs_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = nilfs_compat_ioctl,