The file extent relocation code currently assumes blocksize to be same as PAGE_SIZE. This commit adds code to support subpage blocksize scenario.
Signed-off-by: Chandan Rajendra <[email protected]> --- fs/btrfs/relocation.c | 56 ++++++++++++++++++++++++++++++++++----------------- 1 file changed, 38 insertions(+), 18 deletions(-) diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 40b4439..cf94efc 100644 --- a/fs/btrfs/relocation.c +++ b/fs/btrfs/relocation.c @@ -3103,14 +3103,19 @@ static int relocate_file_extent_cluster(struct inode *inode, { u64 page_start; u64 page_end; + u64 block_start; u64 offset = BTRFS_I(inode)->index_cnt; + u64 blocksize = BTRFS_I(inode)->root->sectorsize; + u64 reserved_space; unsigned long index; unsigned long last_index; struct page *page; struct file_ra_state *ra; gfp_t mask = btrfs_alloc_write_mask(inode->i_mapping); + int nr_blocks; int nr = 0; int ret = 0; + int i; if (!cluster->nr) return 0; @@ -3130,10 +3135,16 @@ static int relocate_file_extent_cluster(struct inode *inode, if (ret) goto out; + page_start = cluster->start - offset; + page_end = min_t(u64, round_down(page_start, PAGE_SIZE) + PAGE_SIZE - 1, + cluster->end - offset); + index = (cluster->start - offset) >> PAGE_SHIFT; last_index = (cluster->end - offset) >> PAGE_SHIFT; while (index <= last_index) { - ret = btrfs_delalloc_reserve_metadata(inode, PAGE_SIZE); + reserved_space = page_end - page_start + 1; + + ret = btrfs_delalloc_reserve_metadata(inode, reserved_space); if (ret) goto out; @@ -3146,7 +3157,7 @@ static int relocate_file_extent_cluster(struct inode *inode, mask); if (!page) { btrfs_delalloc_release_metadata(inode, - PAGE_SIZE); + reserved_space); ret = -ENOMEM; goto out; } @@ -3165,41 +3176,50 @@ static int relocate_file_extent_cluster(struct inode *inode, unlock_page(page); put_page(page); btrfs_delalloc_release_metadata(inode, - PAGE_SIZE); + reserved_space); ret = -EIO; goto out; } } - page_start = page_offset(page); - page_end = page_start + PAGE_SIZE - 1; - lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end); set_page_extent_mapped(page); - if (nr < cluster->nr && - page_start + offset == cluster->boundary[nr]) { - set_extent_bits(&BTRFS_I(inode)->io_tree, - page_start, page_end, - EXTENT_BOUNDARY); - nr++; + nr_blocks = (page_end + 1 - page_start) >> inode->i_blkbits; + + block_start = page_start; + for (i = 0; i < nr_blocks; i++) { + if (nr < cluster->nr && + block_start + offset == cluster->boundary[nr]) { + set_extent_bits(&BTRFS_I(inode)->io_tree, + block_start, block_start + blocksize - 1, + EXTENT_BOUNDARY); + nr++; + } + + block_start += blocksize; } btrfs_set_extent_delalloc(inode, page_start, page_end, NULL); - set_page_blks_state(page, - 1 << BLK_STATE_DIRTY | 1 << BLK_STATE_UPTODATE, - page_start, page_end); - set_page_dirty(page); + if (blocksize < PAGE_SIZE) + set_page_blks_state(page, + 1 << BLK_STATE_DIRTY | 1 << BLK_STATE_UPTODATE, + page_start, page_end); + + unlock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end); - unlock_extent(&BTRFS_I(inode)->io_tree, - page_start, page_end); + set_page_dirty(page); unlock_page(page); put_page(page); index++; balance_dirty_pages_ratelimited(inode->i_mapping); btrfs_throttle(BTRFS_I(inode)->root); + + page_start = page_end + 1; + page_end = min_t(u64, page_start + PAGE_SIZE - 1, + cluster->end - offset); } WARN_ON(nr != cluster->nr); out: -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
