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| author | Badari Pulavarty <pbadari@us.ibm.com> | 2006-03-26 01:38:00 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-26 08:57:01 -0800 |
| commit | b0cf2321c6599138f860517745503691556d8453 (patch) | |
| tree | 39ecfea09c13ce09172ab3ec5a5b6d2fef657cac | |
| parent | 205f87f6b342444f722e4559d33318686f7df2ca (diff) | |
| download | linux-b0cf2321c6599138f860517745503691556d8453.tar.gz linux-b0cf2321c6599138f860517745503691556d8453.tar.bz2 linux-b0cf2321c6599138f860517745503691556d8453.zip | |
[PATCH] pass b_size to ->get_block()
Pass amount of disk needs to be mapped to get_block(). This way one can
modify the fs ->get_block() functions to map multiple blocks at the same time.
[akpm@osdl.org: performance tweak]
[akpm@osdl.org: remove unneeded assignments]
Signed-off-by: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
| -rw-r--r-- | fs/buffer.c | 9 | ||||
| -rw-r--r-- | fs/mpage.c | 2 | ||||
| -rw-r--r-- | include/linux/buffer_head.h | 1 |
3 files changed, 11 insertions, 1 deletions
diff --git a/fs/buffer.c b/fs/buffer.c index e7a1461f4387..a507b58550f1 100644 --- a/fs/buffer.c +++ b/fs/buffer.c @@ -1738,6 +1738,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page, sector_t block; sector_t last_block; struct buffer_head *bh, *head; + const unsigned blocksize = 1 << inode->i_blkbits; int nr_underway = 0; BUG_ON(!PageLocked(page)); @@ -1745,7 +1746,7 @@ static int __block_write_full_page(struct inode *inode, struct page *page, last_block = (i_size_read(inode) - 1) >> inode->i_blkbits; if (!page_has_buffers(page)) { - create_empty_buffers(page, 1 << inode->i_blkbits, + create_empty_buffers(page, blocksize, (1 << BH_Dirty)|(1 << BH_Uptodate)); } @@ -1780,6 +1781,7 @@ 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)) { + WARN_ON(bh->b_size != blocksize); err = get_block(inode, block, bh, 1); if (err) goto recover; @@ -1933,6 +1935,7 @@ static int __block_prepare_write(struct inode *inode, struct page *page, if (buffer_new(bh)) clear_buffer_new(bh); if (!buffer_mapped(bh)) { + WARN_ON(bh->b_size != blocksize); err = get_block(inode, block, bh, 1); if (err) break; @@ -2088,6 +2091,7 @@ int block_read_full_page(struct page *page, get_block_t *get_block) fully_mapped = 0; if (iblock < lblock) { + WARN_ON(bh->b_size != blocksize); err = get_block(inode, iblock, bh, 0); if (err) SetPageError(page); @@ -2409,6 +2413,7 @@ int nobh_prepare_write(struct page *page, unsigned from, unsigned to, create = 1; if (block_start >= to) create = 0; + map_bh.b_size = blocksize; ret = get_block(inode, block_in_file + block_in_page, &map_bh, create); if (ret) @@ -2669,6 +2674,7 @@ int block_truncate_page(struct address_space *mapping, err = 0; if (!buffer_mapped(bh)) { + WARN_ON(bh->b_size != blocksize); err = get_block(inode, iblock, bh, 0); if (err) goto unlock; @@ -2755,6 +2761,7 @@ sector_t generic_block_bmap(struct address_space *mapping, sector_t block, struct inode *inode = mapping->host; tmp.b_state = 0; tmp.b_blocknr = 0; + tmp.b_size = 1 << inode->i_blkbits; get_block(inode, block, &tmp, 0); return tmp.b_blocknr; } diff --git a/fs/mpage.c b/fs/mpage.c index e431cb3878d6..7903b740cc11 100644 --- a/fs/mpage.c +++ b/fs/mpage.c @@ -192,6 +192,7 @@ do_mpage_readpage(struct bio *bio, struct page *page, unsigned nr_pages, page_block++, block_in_file++) { bh.b_state = 0; if (block_in_file < last_block) { + bh.b_size = blocksize; if (get_block(inode, block_in_file, &bh, 0)) goto confused; } @@ -472,6 +473,7 @@ __mpage_writepage(struct bio *bio, struct page *page, get_block_t get_block, for (page_block = 0; page_block < blocks_per_page; ) { map_bh.b_state = 0; + map_bh.b_size = 1 << blkbits; if (get_block(inode, block_in_file, &map_bh, 1)) goto confused; if (buffer_new(&map_bh)) diff --git a/include/linux/buffer_head.h b/include/linux/buffer_head.h index 464f068f8b16..fb7e9b7ccbe3 100644 --- a/include/linux/buffer_head.h +++ b/include/linux/buffer_head.h @@ -280,6 +280,7 @@ map_bh(struct buffer_head *bh, struct super_block *sb, sector_t block) set_buffer_mapped(bh); bh->b_bdev = sb->s_bdev; bh->b_blocknr = block; + bh->b_size = sb->s_blocksize; } /* |