From patchwork Tue Jun 14 07:11:05 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandan Rajendra X-Patchwork-Id: 9175081 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 08F016075D for ; Tue, 14 Jun 2016 07:12:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id ECFB22522B for ; Tue, 14 Jun 2016 07:12:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E1E1E281DB; Tue, 14 Jun 2016 07:12:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3A03D2522B for ; Tue, 14 Jun 2016 07:12:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751723AbcFNHMG (ORCPT ); Tue, 14 Jun 2016 03:12:06 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:17790 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751717AbcFNHMF (ORCPT ); Tue, 14 Jun 2016 03:12:05 -0400 Received: from pps.filterd (m0098409.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.11/8.16.0.11) with SMTP id u5E79LZ6140335 for ; Tue, 14 Jun 2016 03:12:04 -0400 Received: from e31.co.us.ibm.com (e31.co.us.ibm.com [32.97.110.149]) by mx0a-001b2d01.pphosted.com with ESMTP id 23gdxtw13p-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 14 Jun 2016 03:12:04 -0400 Received: from localhost by e31.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; Tue, 14 Jun 2016 01:11:59 -0600 X-IBM-Helo: d03dlp03.boulder.ibm.com X-IBM-MailFrom: chandan@linux.vnet.ibm.com X-IBM-RcptTo: clm@fb.com; jbacik@fb.com; chandan@mykolab.com; dsterba@suse.cz; linux-btrfs@vger.kernel.org Received: from b03cxnp08026.gho.boulder.ibm.com (b03cxnp08026.gho.boulder.ibm.com [9.17.130.18]) by d03dlp03.boulder.ibm.com (Postfix) with ESMTP id 9AA2D19D8040; Tue, 14 Jun 2016 01:11:38 -0600 (MDT) Received: from b03ledav003.gho.boulder.ibm.com (b03ledav003.gho.boulder.ibm.com [9.17.130.234]) by b03cxnp08026.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u5E7BxMD47186172; Tue, 14 Jun 2016 00:11:59 -0700 Received: from b03ledav003.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F026F6A03D; Tue, 14 Jun 2016 01:11:58 -0600 (MDT) Received: from localhost.in.ibm.com (unknown [9.124.35.172]) by b03ledav003.gho.boulder.ibm.com (Postfix) with ESMTP id 09E986A041; Tue, 14 Jun 2016 01:11:56 -0600 (MDT) From: Chandan Rajendra To: clm@fb.com, jbacik@fb.com, dsterba@suse.cz Cc: Chandan Rajendra , linux-btrfs@vger.kernel.org, chandan@mykolab.com Subject: [PATCH V19 08/19] Btrfs: subpage-blocksize: Deal with partial ordered extent allocations. Date: Tue, 14 Jun 2016 12:41:05 +0530 X-Mailer: git-send-email 2.5.5 In-Reply-To: <1465888276-30670-1-git-send-email-chandan@linux.vnet.ibm.com> References: <1465888276-30670-1-git-send-email-chandan@linux.vnet.ibm.com> X-TM-AS-GCONF: 00 X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16061407-8235-0000-0000-00000895804E X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 16061407-8236-0000-0000-00003234B6D9 Message-Id: <1465888276-30670-9-git-send-email-chandan@linux.vnet.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:, , definitions=2016-06-14_03:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 suspectscore=2 malwarescore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1604210000 definitions=main-1606140080 Sender: linux-btrfs-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In subpage-blocksize scenario, extent allocations for only some of the dirty blocks of a page can succeed, while allocation for rest of the blocks can fail. This patch allows I/O against such pages to be submitted. Signed-off-by: Chandan Rajendra --- fs/btrfs/extent_io.c | 27 ++++++++++++++------------- fs/btrfs/inode.c | 39 ++++++++++++++++++++++++++------------- 2 files changed, 40 insertions(+), 26 deletions(-) diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index 0465311..74e27f9 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -1863,17 +1863,23 @@ void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end, if (page_ops & PAGE_SET_PRIVATE2) SetPagePrivate2(pages[i]); + if (page_ops & PAGE_SET_ERROR) + SetPageError(pages[i]); + if (pages[i] == locked_page) { put_page(pages[i]); continue; } - if (page_ops & PAGE_CLEAR_DIRTY) + + if ((page_ops & PAGE_CLEAR_DIRTY) + && !PagePrivate2(pages[i])) clear_page_dirty_for_io(pages[i]); - if (page_ops & PAGE_SET_WRITEBACK) + if ((page_ops & PAGE_SET_WRITEBACK) + && !PagePrivate2(pages[i])) set_page_writeback(pages[i]); - if (page_ops & PAGE_SET_ERROR) - SetPageError(pages[i]); - if (page_ops & PAGE_END_WRITEBACK) + + if ((page_ops & PAGE_END_WRITEBACK) + && !PagePrivate2(pages[i])) end_page_writeback(pages[i]); if (page_ops & PAGE_UNLOCK) unlock_page(pages[i]); @@ -2565,7 +2571,7 @@ void end_extent_writepage(struct page *page, int err, u64 start, u64 end) uptodate = 0; } - if (!uptodate) { + if (!uptodate || PageError(page)) { ClearPageUptodate(page); SetPageError(page); ret = ret < 0 ? ret : -EIO; @@ -3420,7 +3426,6 @@ static noinline_for_stack int writepage_delalloc(struct inode *inode, nr_written); /* File system has been set read-only */ if (ret) { - SetPageError(page); /* fill_delalloc should be return < 0 for error * but just in case, we use > 0 here meaning the * IO is started, so we don't want to return > 0 @@ -3641,7 +3646,6 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, struct inode *inode = page->mapping->host; struct extent_page_data *epd = data; u64 start = page_offset(page); - u64 page_end = start + PAGE_SIZE - 1; int ret; int nr = 0; size_t pg_offset = 0; @@ -3686,7 +3690,7 @@ static int __extent_writepage(struct page *page, struct writeback_control *wbc, ret = writepage_delalloc(inode, page, wbc, epd, start, &nr_written); if (ret == 1) goto done_unlocked; - if (ret) + if (ret && !PagePrivate2(page)) goto done; ret = __extent_writepage_io(inode, page, wbc, epd, @@ -3700,10 +3704,7 @@ done: set_page_writeback(page); end_page_writeback(page); } - if (PageError(page)) { - ret = ret < 0 ? ret : -EIO; - end_extent_writepage(page, ret, start, page_end); - } + unlock_page(page); return ret; diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index e85865b..a6bb415 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -943,6 +943,8 @@ static noinline int cow_file_range(struct inode *inode, struct btrfs_key ins; struct extent_map *em; struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree; + struct btrfs_ordered_extent *ordered; + unsigned long page_ops, extent_ops; int ret = 0; if (btrfs_is_free_space_inode(inode)) { @@ -987,8 +989,6 @@ static noinline int cow_file_range(struct inode *inode, btrfs_drop_extent_cache(inode, start, start + num_bytes - 1, 0); while (disk_num_bytes > 0) { - unsigned long op; - cur_alloc_size = disk_num_bytes; ret = btrfs_reserve_extent(root, cur_alloc_size, root->sectorsize, 0, alloc_hint, @@ -1041,7 +1041,7 @@ static noinline int cow_file_range(struct inode *inode, ret = btrfs_reloc_clone_csums(inode, start, cur_alloc_size); if (ret) - goto out_drop_extent_cache; + goto out_remove_ordered_extent; } btrfs_dec_block_group_reservations(root->fs_info, ins.objectid); @@ -1056,13 +1056,12 @@ static noinline int cow_file_range(struct inode *inode, * Do set the Private2 bit so we know this page was properly * setup for writepage */ - op = unlock ? PAGE_UNLOCK : 0; - op |= PAGE_SET_PRIVATE2; - + page_ops = unlock ? PAGE_UNLOCK : 0; + page_ops |= PAGE_SET_PRIVATE2; + extent_ops = EXTENT_LOCKED | EXTENT_DELALLOC; extent_clear_unlock_delalloc(inode, start, - start + ram_size - 1, locked_page, - EXTENT_LOCKED | EXTENT_DELALLOC, - op); + start + ram_size - 1, locked_page, + extent_ops, page_ops); disk_num_bytes -= cur_alloc_size; num_bytes -= cur_alloc_size; alloc_hint = ins.objectid + ins.offset; @@ -1071,17 +1070,31 @@ static noinline int cow_file_range(struct inode *inode, out: return ret; +out_remove_ordered_extent: + ordered = btrfs_lookup_ordered_extent(inode, start); + BUG_ON(!ordered); + btrfs_remove_ordered_extent(inode, ordered); + /* once for us */ + btrfs_put_ordered_extent(ordered); + /* once for the tree */ + btrfs_put_ordered_extent(ordered); + out_drop_extent_cache: btrfs_drop_extent_cache(inode, start, start + ram_size - 1, 0); + out_reserve: btrfs_dec_block_group_reservations(root->fs_info, ins.objectid); btrfs_free_reserved_extent(root, ins.objectid, ins.offset, 1); + out_unlock: + page_ops = unlock ? PAGE_UNLOCK : 0; + page_ops |= PAGE_CLEAR_DIRTY | PAGE_SET_WRITEBACK | PAGE_END_WRITEBACK + | PAGE_SET_ERROR; + extent_ops = EXTENT_LOCKED | EXTENT_DELALLOC | EXTENT_DO_ACCOUNTING + | EXTENT_DEFRAG; + extent_clear_unlock_delalloc(inode, start, end, locked_page, - EXTENT_LOCKED | EXTENT_DO_ACCOUNTING | - EXTENT_DELALLOC | EXTENT_DEFRAG, - PAGE_UNLOCK | PAGE_CLEAR_DIRTY | - PAGE_SET_WRITEBACK | PAGE_END_WRITEBACK); + extent_ops, page_ops); goto out; }