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authorAlex Tomas <alex@clusterfs.com>2008-07-12 03:27:31 +0400
committerTheodore Ts'o <tytso@mit.edu>2008-07-12 03:27:31 +0400
commit29a814d2ee0e43c2980f33f91c1311ec06c0aa35 (patch)
treedfc9d45fc3194237192b6cde1069faa70fe4c260 /fs/buffer.c
parent87c89c232c8f7b3820c33c3b9bc803e9358027da (diff)
downloadlinux-29a814d2ee0e43c2980f33f91c1311ec06c0aa35.tar.xz
vfs: add hooks for ext4's delayed allocation support
Export mpage_bio_submit() and __mpage_writepage() for the benefit of ext4's delayed allocation support. Also change __block_write_full_page so that if buffers that have the BH_Delay flag set it will call get_block() to get the physical block allocated, just as in the !BH_Mapped case. Signed-off-by: Alex Tomas <alex@clusterfs.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Diffstat (limited to 'fs/buffer.c')
-rw-r--r--fs/buffer.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/buffer.c b/fs/buffer.c
index f4b033237a02..5fa1512cd9a2 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1691,11 +1691,13 @@ static int __block_write_full_page(struct inode *inode, struct page *page,
*/
clear_buffer_dirty(bh);
set_buffer_uptodate(bh);
- } else if (!buffer_mapped(bh) && buffer_dirty(bh)) {
+ } else if ((!buffer_mapped(bh) || buffer_delay(bh)) &&
+ buffer_dirty(bh)) {
WARN_ON(bh->b_size != blocksize);
err = get_block(inode, block, bh, 1);
if (err)
goto recover;
+ clear_buffer_delay(bh);
if (buffer_new(bh)) {
/* blockdev mappings never come here */
clear_buffer_new(bh);
@@ -1774,7 +1776,8 @@ recover:
bh = head;
/* Recovery: lock and submit the mapped buffers */
do {
- if (buffer_mapped(bh) && buffer_dirty(bh)) {
+ if (buffer_mapped(bh) && buffer_dirty(bh) &&
+ !buffer_delay(bh)) {
lock_buffer(bh);
mark_buffer_async_write(bh);
} else {