From 4d1b5fb4d7075f862848dbff8873e22382abd482 Mon Sep 17 00:00:00 2001 From: Chris Mason Date: Wed, 20 Aug 2008 09:44:52 -0400 Subject: Btrfs: Lookup readpage checksums on bio submission again This optimization had been removed because I thought it was triggering csum errors. The real cause of the errors was elsewhere, and so this optimization is back. Signed-off-by: Chris Mason --- fs/btrfs/inode.c | 62 ++++---------------------------------------------------- 1 file changed, 4 insertions(+), 58 deletions(-) (limited to 'fs/btrfs/inode.c') diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 6c778043207..38d7a81763c 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -389,15 +389,15 @@ int btrfs_submit_bio_hook(struct inode *inode, int rw, struct bio *bio, ret = btrfs_bio_wq_end_io(root->fs_info, bio, 0); BUG_ON(ret); - if (!(rw & (1 << BIO_RW))) { - goto mapit; - } - if (btrfs_test_opt(root, NODATASUM) || btrfs_test_flag(inode, NODATASUM)) { goto mapit; } + if (!(rw & (1 << BIO_RW))) { + btrfs_lookup_bio_sums(root, inode, bio); + goto mapit; + } return btrfs_wq_submit_bio(BTRFS_I(inode)->root->fs_info, inode, rw, bio, mirror_num, __btrfs_submit_bio_hook); @@ -603,59 +603,6 @@ int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end, return btrfs_finish_ordered_io(page->mapping->host, start, end); } -int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end) -{ - int ret = 0; - struct inode *inode = page->mapping->host; - struct btrfs_root *root = BTRFS_I(inode)->root; - struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree; - struct btrfs_csum_item *item; - struct btrfs_path *path = NULL; - u32 csum; - - if (btrfs_test_opt(root, NODATASUM) || - btrfs_test_flag(inode, NODATASUM)) - return 0; - - /* - * It is possible there is an ordered extent that has - * not yet finished for this range in the file. If so, - * that extent will have a csum cached, and it will insert - * the sum after all the blocks in the extent are fully - * on disk. So, look for an ordered extent and use the - * sum if found. We have to do this before looking in the - * btree because csum items are pre-inserted based on - * the file size. btrfs_lookup_csum might find an item - * that still hasn't been fully filled. - */ - ret = btrfs_find_ordered_sum(inode, start, &csum); - if (ret == 0) - goto found; - - ret = 0; - path = btrfs_alloc_path(); - item = btrfs_lookup_csum(NULL, root, path, inode->i_ino, start, 0); - if (IS_ERR(item)) { - ret = PTR_ERR(item); - /* a csum that isn't present is a preallocated region. */ - if (ret == -ENOENT || ret == -EFBIG) - ret = 0; - csum = 0; - if (printk_ratelimit()) - printk("no csum found for inode %lu start %Lu\n", inode->i_ino, - start); - goto out; - } - read_extent_buffer(path->nodes[0], &csum, (unsigned long)item, - BTRFS_CRC32_SIZE); -found: - set_state_private(io_tree, start, csum); -out: - if (path) - btrfs_free_path(path); - return ret; -} - struct io_failure_record { struct page *page; u64 start; @@ -3669,7 +3616,6 @@ static struct extent_io_ops btrfs_extent_io_ops = { .fill_delalloc = run_delalloc_range, .submit_bio_hook = btrfs_submit_bio_hook, .merge_bio_hook = btrfs_merge_bio_hook, - .readpage_io_hook = btrfs_readpage_io_hook, .readpage_end_io_hook = btrfs_readpage_end_io_hook, .writepage_end_io_hook = btrfs_writepage_end_io_hook, .writepage_start_hook = btrfs_writepage_start_hook, -- cgit v1.2.3