diff options
| author | Alex Tomas <alex@clusterfs.com> | 2008-07-12 03:27:31 +0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2008-07-12 03:27:31 +0400 |
| commit | 29a814d2ee0e43c2980f33f91c1311ec06c0aa35 (patch) | |
| tree | dfc9d45fc3194237192b6cde1069faa70fe4c260 | |
| parent | 87c89c232c8f7b3820c33c3b9bc803e9358027da (diff) | |
| download | linux-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>
| -rw-r--r-- | fs/buffer.c | 7 | ||||
| -rw-r--r-- | fs/mpage.c | 14 | ||||
| -rw-r--r-- | include/linux/mpage.h | 10 |
3 files changed, 20 insertions, 11 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 { diff --git a/fs/mpage.c b/fs/mpage.c index 235e4d3873a8..dbcc7af76a15 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -82,7 +82,7 @@ static void mpage_end_io_write(struct bio *bio, int err) bio_put(bio); } -static struct bio *mpage_bio_submit(int rw, struct bio *bio) +struct bio *mpage_bio_submit(int rw, struct bio *bio) { bio->bi_end_io = mpage_end_io_read; if (rw == WRITE) @@ -90,6 +90,7 @@ static struct bio *mpage_bio_submit(int rw, struct bio *bio) submit_bio(rw, bio); return NULL; } +EXPORT_SYMBOL(mpage_bio_submit); static struct bio * mpage_alloc(struct block_device *bdev, @@ -435,15 +436,9 @@ EXPORT_SYMBOL(mpage_readpage); * written, so it can intelligently allocate a suitably-sized BIO. For now, * just allocate full-size (16-page) BIOs. */ -struct mpage_data { - struct bio *bio; - sector_t last_block_in_bio; - get_block_t *get_block; - unsigned use_writepage; -}; -static int __mpage_writepage(struct page *page, struct writeback_control *wbc, - void *data) +int __mpage_writepage(struct page *page, struct writeback_control *wbc, + void *data) { struct mpage_data *mpd = data; struct bio *bio = mpd->bio; @@ -651,6 +646,7 @@ out: mpd->bio = bio; return ret; } +EXPORT_SYMBOL(__mpage_writepage); /** * mpage_writepages - walk the list of dirty pages of the given address space & writepage() all of them diff --git a/include/linux/mpage.h b/include/linux/mpage.h index 068a0c9946af..5c42821da2d1 100644 --- a/include/linux/mpage.h +++ b/include/linux/mpage.h @@ -11,11 +11,21 @@ */ #ifdef CONFIG_BLOCK +struct mpage_data { + struct bio *bio; + sector_t last_block_in_bio; + get_block_t *get_block; + unsigned use_writepage; +}; + struct writeback_control; +struct bio *mpage_bio_submit(int rw, struct bio *bio); int mpage_readpages(struct address_space *mapping, struct list_head *pages, unsigned nr_pages, get_block_t get_block); int mpage_readpage(struct page *page, get_block_t get_block); +int __mpage_writepage(struct page *page, struct writeback_control *wbc, + void *data); int mpage_writepages(struct address_space *mapping, struct writeback_control *wbc, get_block_t get_block); int mpage_writepage(struct page *page, get_block_t *get_block, |