diff options
| -rw-r--r-- | fs/btrfs/disk-io.c | 9 | ||||
| -rw-r--r-- | fs/btrfs/extent_io.c | 8 | ||||
| -rw-r--r-- | fs/btrfs/inode.c | 33 | ||||
| -rw-r--r-- | fs/btrfs/ordered-data.c | 1 |
4 files changed, 31 insertions, 20 deletions
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c index 86e84a8..7ce3f83 100644 --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -1011,9 +1011,16 @@ void btrfs_unplug_io_fn(struct backing_dev_info *bdi, struct page *page) spin_lock(&em_tree->lock); em = lookup_extent_mapping(em_tree, offset, PAGE_CACHE_SIZE); spin_unlock(&em_tree->lock); - if (!em) + if (!em) { + __unplug_io_fn(bdi, page); return; + } + if (em->block_start >= EXTENT_MAP_LAST_BYTE) { + free_extent_map(em); + __unplug_io_fn(bdi, page); + return; + } offset = offset - em->start; btrfs_unplug_page(&BTRFS_I(inode)->root->fs_info->mapping_tree, em->block_start + offset, page); diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 9965993..e3547a9 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1949,18 +1949,18 @@ printk("2bad mapping end %Lu cur %Lu\n", end, cur); cur + iosize - 1); } if (!ret) { - unsigned long nr = (last_byte >> PAGE_CACHE_SHIFT) + 1; - nr -= page->index; + unsigned long pnr = (last_byte >> PAGE_CACHE_SHIFT) + 1; + pnr -= page->index; ret = submit_extent_page(READ, tree, page, sector, iosize, page_offset, - bdev, bio, nr, + bdev, bio, pnr, end_bio_extent_readpage, mirror_num); + nr++; } if (ret) SetPageError(page); cur = cur + iosize; page_offset += iosize; - nr++; } if (!nr) { if (!PageError(page)) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 28e6670..0e90315 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -611,22 +611,25 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end) 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(); - mutex_lock(&BTRFS_I(inode)->csum_mutex); item = btrfs_lookup_csum(NULL, root, path, inode->i_ino, start, 0); if (IS_ERR(item)) { - /* - * 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. - */ - ret = btrfs_find_ordered_sum(inode, start, &csum); - if (ret == 0) - goto found; - ret = PTR_ERR(item); /* a csum that isn't present is a preallocated region. */ if (ret == -ENOENT || ret == -EFBIG) @@ -641,7 +644,6 @@ int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end) found: set_state_private(io_tree, start, csum); out: - mutex_unlock(&BTRFS_I(inode)->csum_mutex); if (path) btrfs_free_path(path); return ret; @@ -1375,7 +1377,7 @@ again: } if (!PageUptodate(page)) { ret = -EIO; - goto out; + goto out_unlock; } } wait_on_page_writeback(page); @@ -1406,6 +1408,7 @@ again: set_page_dirty(page); unlock_extent(io_tree, page_start, page_end, GFP_NOFS); +out_unlock: unlock_page(page); page_cache_release(page); out: diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c index b695f5b..e42fd23 100644 --- a/fs/btrfs/ordered-data.c +++ b/fs/btrfs/ordered-data.c @@ -557,6 +557,7 @@ int btrfs_find_ordered_sum(struct inode *inode, u64 offset, u32 *sum) } out: mutex_unlock(&tree->mutex); + btrfs_put_ordered_extent(ordered); return ret; } |