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Subject[PATCH 1/1] fs/mpage.c: forgotten WRITE_SYNC in case of data integrity write
Date
In case of wbc->sync_mode == WB_SYNC_ALL we need to do data integrity write,
thus mark request as WRITE_SYNC.

Signed-off-by: Roman Pen <r.peniaev@gmail.com>
CC: Alexander Viro <viro@zeniv.linux.org.uk>
CC: linux-fsdevel@vger.kernel.org
CC: linux-kernel@vger.kernel.org
---
fs/mpage.c | 23 +++++++++++++++--------
1 file changed, 15 insertions(+), 8 deletions(-)

diff --git a/fs/mpage.c b/fs/mpage.c
index 4979ffa..4e0af5a 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -462,6 +462,7 @@ static int __mpage_writepage(struct page *page, struct writeback_control *wbc,
struct buffer_head map_bh;
loff_t i_size = i_size_read(inode);
int ret = 0;
+ int wr = (wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC : WRITE);

if (page_has_buffers(page)) {
struct buffer_head *head = page_buffers(page);
@@ -570,7 +571,7 @@ page_is_mapped:
* This page will go to BIO. Do we need to send this BIO off first?
*/
if (bio && mpd->last_block_in_bio != blocks[0] - 1)
- bio = mpage_bio_submit(WRITE, bio);
+ bio = mpage_bio_submit(wr, bio);

alloc_new:
if (bio == NULL) {
@@ -587,7 +588,7 @@ alloc_new:
*/
length = first_unmapped << blkbits;
if (bio_add_page(bio, page, length, 0) < length) {
- bio = mpage_bio_submit(WRITE, bio);
+ bio = mpage_bio_submit(wr, bio);
goto alloc_new;
}

@@ -620,7 +621,7 @@ alloc_new:
set_page_writeback(page);
unlock_page(page);
if (boundary || (first_unmapped != blocks_per_page)) {
- bio = mpage_bio_submit(WRITE, bio);
+ bio = mpage_bio_submit(wr, bio);
if (boundary_block) {
write_boundary_block(boundary_bdev,
boundary_block, 1 << blkbits);
@@ -632,7 +633,7 @@ alloc_new:

confused:
if (bio)
- bio = mpage_bio_submit(WRITE, bio);
+ bio = mpage_bio_submit(wr, bio);

if (mpd->use_writepage) {
ret = mapping->a_ops->writepage(page, wbc);
@@ -688,8 +689,11 @@ mpage_writepages(struct address_space *mapping,
};

ret = write_cache_pages(mapping, wbc, __mpage_writepage, &mpd);
- if (mpd.bio)
- mpage_bio_submit(WRITE, mpd.bio);
+ if (mpd.bio) {
+ int wr = (wbc->sync_mode == WB_SYNC_ALL ?
+ WRITE_SYNC : WRITE);
+ mpage_bio_submit(wr, mpd.bio);
+ }
}
blk_finish_plug(&plug);
return ret;
@@ -706,8 +710,11 @@ int mpage_writepage(struct page *page, get_block_t get_block,
.use_writepage = 0,
};
int ret = __mpage_writepage(page, wbc, &mpd);
- if (mpd.bio)
- mpage_bio_submit(WRITE, mpd.bio);
+ if (mpd.bio) {
+ int wr = (wbc->sync_mode == WB_SYNC_ALL ?
+ WRITE_SYNC : WRITE);
+ mpage_bio_submit(wr, mpd.bio);
+ }
return ret;
}
EXPORT_SYMBOL(mpage_writepage);
--
1.8.5.2


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