From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from e28smtp08.in.ibm.com ([125.16.236.8]:48224 "EHLO e28smtp08.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751924AbcDZN2T (ORCPT ); Tue, 26 Apr 2016 09:28:19 -0400 Received: from localhost by e28smtp08.in.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 26 Apr 2016 18:58:16 +0530 Received: from d28av02.in.ibm.com (d28av02.in.ibm.com [9.184.220.64]) by d28relay04.in.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u3QDSGRA18940166 for ; Tue, 26 Apr 2016 18:58:16 +0530 Received: from d28av02.in.ibm.com (localhost [127.0.0.1]) by d28av02.in.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u3QDSBgM010080 for ; Tue, 26 Apr 2016 18:58:13 +0530 From: Chandan Rajendra To: linux-btrfs@vger.kernel.org Cc: Chandan Rajendra , dsterba@suse.cz, clm@fb.com, jbacik@fb.com, chandan@mykolab.com Subject: [PATCH V18 17/18] Btrfs: subpage-blocksize: Make file extent relocate code subpage blocksize aware Date: Tue, 26 Apr 2016 18:57:16 +0530 Message-Id: <1461677237-7703-18-git-send-email-chandan@linux.vnet.ibm.com> In-Reply-To: <1461677237-7703-1-git-send-email-chandan@linux.vnet.ibm.com> References: <1461677237-7703-1-git-send-email-chandan@linux.vnet.ibm.com> Sender: linux-btrfs-owner@vger.kernel.org List-ID: 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 --- fs/btrfs/relocation.c | 73 +++++++++++++++++++++++++++++++++------------------ 1 file changed, 48 insertions(+), 25 deletions(-) diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c index 35fd62e..61a6414 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 block_end; u64 offset = BTRFS_I(inode)->index_cnt; + u64 blocksize = BTRFS_I(inode)->root->sectorsize; 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; @@ -3130,13 +3135,13 @@ static int relocate_file_extent_cluster(struct inode *inode, if (ret) goto out; + page_start = cluster->start - offset; + page_end = min_t(u64, page_start + 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); - if (ret) - goto out; - page = find_lock_page(inode->i_mapping, index); if (!page) { page_cache_sync_readahead(inode->i_mapping, @@ -3145,8 +3150,6 @@ static int relocate_file_extent_cluster(struct inode *inode, page = find_or_create_page(inode->i_mapping, index, mask); if (!page) { - btrfs_delalloc_release_metadata(inode, - PAGE_SIZE); ret = -ENOMEM; goto out; } @@ -3164,42 +3167,62 @@ static int relocate_file_extent_cluster(struct inode *inode, if (!PageUptodate(page)) { unlock_page(page); put_page(page); - btrfs_delalloc_release_metadata(inode, - PAGE_SIZE); ret = -EIO; goto out; } } - page_start = page_offset(page); - page_end = page_start + PAGE_SIZE - 1; + nr_blocks = (page_end + 1 - page_start) >> inode->i_blkbits; + i = 0; - lock_extent(&BTRFS_I(inode)->io_tree, page_start, page_end); + while (i < nr_blocks) { + ret = btrfs_delalloc_reserve_metadata(inode, blocksize); + if (ret) { + if (i) + set_page_dirty(page); + unlock_page(page); + put_page(page); + goto out; + } + + block_start = page_start + (i << inode->i_blkbits); + block_end = block_start + blocksize - 1; + + lock_extent(&BTRFS_I(inode)->io_tree, block_start, + block_end); + + set_page_extent_mapped(page); - set_page_extent_mapped(page); + if (nr < cluster->nr && + block_start + offset == cluster->boundary[nr]) { + set_extent_bits(&BTRFS_I(inode)->io_tree, + block_start, block_end, + EXTENT_BOUNDARY, GFP_NOFS); + nr++; + } + + btrfs_set_extent_delalloc(inode, block_start, + block_end, NULL); + set_page_blks_state(page, + 1 << BLK_STATE_DIRTY | 1 << BLK_STATE_UPTODATE, + block_start, block_end); - if (nr < cluster->nr && - page_start + offset == cluster->boundary[nr]) { - set_extent_bits(&BTRFS_I(inode)->io_tree, - page_start, page_end, - EXTENT_BOUNDARY, GFP_NOFS); - nr++; + unlock_extent(&BTRFS_I(inode)->io_tree, + block_start, block_end); + i++; } - 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); - - unlock_extent(&BTRFS_I(inode)->io_tree, - page_start, page_end); unlock_page(page); put_page(page); index++; balance_dirty_pages_ratelimited(inode->i_mapping); btrfs_throttle(BTRFS_I(inode)->root); + + page_start += PAGE_SIZE; + page_end = min_t(u64, page_start + PAGE_SIZE - 1, + cluster->end - offset); } WARN_ON(nr != cluster->nr); out: -- 2.1.0