From patchwork Tue Mar 16 19:43:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Omar Sandoval X-Patchwork-Id: 12143655 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3440EC43603 for ; Tue, 16 Mar 2021 19:44:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A3A864F7B for ; Tue, 16 Mar 2021 19:44:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240563AbhCPTop (ORCPT ); Tue, 16 Mar 2021 15:44:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35536 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240551AbhCPTnu (ORCPT ); Tue, 16 Mar 2021 15:43:50 -0400 Received: from mail-pf1-x433.google.com (mail-pf1-x433.google.com [IPv6:2607:f8b0:4864:20::433]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 053B5C061756 for ; Tue, 16 Mar 2021 12:43:50 -0700 (PDT) Received: by mail-pf1-x433.google.com with SMTP id o3so4880359pfh.11 for ; Tue, 16 Mar 2021 12:43:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=osandov-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=jSKHvRtiLzQ0nIfY/b2S4DZP5FrKlo1Lg2WmGTos3Cs=; b=v+oIr2U9YDdibIzUjesIgyG1jPtB/sDefUyNvMr8islQD9XaX8RnCtgklRqQUEXXAZ ZVYa3VoFwS0yn8CcDAKDg+1vw6BDAXQG3EtmFhHbENnZMAV1hR2ydTPtahgmmDTQKPw8 ii9uHMo2ohahfjC2x36g7rhmY0PjUjNrU/yAskgbrSaqSIsDmD0xwuPPlRxwgXvrFXjR vFUAJKx6AU7q0TBjNBIPMSlUvUc6JmSLKVhxuXnGvAmnTtaB+TJZ3j5oLQiIHAALZFX9 95qNn0fBnLTthJlPqTTlWgjAL6jNJ3SFTGi1mbeezQKT6JiCvKeHaoaexhuGx/jCWbzg c04g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=jSKHvRtiLzQ0nIfY/b2S4DZP5FrKlo1Lg2WmGTos3Cs=; b=ms8kbSo+Wtwi3/uUqSq+MDBk4nR0yjhxa0BcEy55NGacEZe8nLPTdmSaqLb+KkXDL4 Y5zamuD7AkPeTF6gUfEZ5AIXRy+Dg1kijpmbB98wAHWJXknDTFSK7RPPW9y1ebxDJFHi U38/QusPZyPBkaEUiHb1X1JcExXvaJcq0SRF5o57avinmQ6W8eyJovRZSfJesia3d69x BOOZADrQD2QoPxCdD6KF7EhY54fTCoIdpWWnOmUOQRE+Ws9/dshVnkVDI8I/DZTFksuK K3dA316ZeWitvC3DeRR8/jmbL5HHNbybI4uLFYd9srn1Jk2CyNT0TviQDlDlYneY5c0p aDpQ== X-Gm-Message-State: AOAM531zIWgNDBIBdi2T7UWg1SG6Sriz6ZD5pFIRlNWtNbAyAxDSUxkr Ei9239hx4FDvBsez4xW0D6ozN4PInOG0Gw== X-Google-Smtp-Source: ABdhPJyVPD5jc29rdQI0tpSjxMYi8LYTnd+GQnrz8CHq1NEdvJhO8YMzq+TGz0y/iRxOGgUhb0+xCA== X-Received: by 2002:a63:d153:: with SMTP id c19mr1088011pgj.311.1615923828710; Tue, 16 Mar 2021 12:43:48 -0700 (PDT) Received: from relinquished.tfbnw.net ([2620:10d:c090:400::5:532]) by smtp.gmail.com with ESMTPSA id gm10sm217264pjb.4.2021.03.16.12.43.46 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 16 Mar 2021 12:43:47 -0700 (PDT) From: Omar Sandoval To: linux-fsdevel@vger.kernel.org, linux-btrfs@vger.kernel.org, Al Viro , Christoph Hellwig Cc: Dave Chinner , Jann Horn , Amir Goldstein , Aleksa Sarai , linux-api@vger.kernel.org, kernel-team@fb.com Subject: [PATCH v8 08/10] btrfs: optionally extend i_size in cow_file_range_inline() Date: Tue, 16 Mar 2021 12:43:04 -0700 Message-Id: <99661081363ab004c73361aaca4a418a11fc10fc.1615922644.git.osandov@fb.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org From: Omar Sandoval Currently, an inline extent is always created after i_size is extended from btrfs_dirty_pages(). However, for encoded writes, we only want to update i_size after we successfully created the inline extent. Add an update_i_size parameter to cow_file_range_inline() and insert_inline_extent() and pass in the size of the extent rather than determining it from i_size. Since the start parameter is always passed as 0, get rid of it and simplify the logic in these two functions. While we're here, let's document the requirements for creating an inline extent. Reviewed-by: Josef Bacik Signed-off-by: Omar Sandoval --- fs/btrfs/inode.c | 100 +++++++++++++++++++++++------------------------ 1 file changed, 48 insertions(+), 52 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 3c1f1297c9d9..b362e73af840 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -203,9 +203,10 @@ static int btrfs_init_inode_security(struct btrfs_trans_handle *trans, static int insert_inline_extent(struct btrfs_trans_handle *trans, struct btrfs_path *path, bool extent_inserted, struct btrfs_root *root, struct inode *inode, - u64 start, size_t size, size_t compressed_size, + size_t size, size_t compressed_size, int compress_type, - struct page **compressed_pages) + struct page **compressed_pages, + bool update_i_size) { struct extent_buffer *leaf; struct page *page = NULL; @@ -214,7 +215,7 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, struct btrfs_file_extent_item *ei; int ret; size_t cur_size = size; - unsigned long offset; + u64 i_size; ASSERT((compressed_size > 0 && compressed_pages) || (compressed_size == 0 && !compressed_pages)); @@ -227,7 +228,7 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, size_t datasize; key.objectid = btrfs_ino(BTRFS_I(inode)); - key.offset = start; + key.offset = 0; key.type = BTRFS_EXTENT_DATA_KEY; datasize = btrfs_file_extent_calc_inline_size(cur_size); @@ -265,12 +266,10 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, btrfs_set_file_extent_compression(leaf, ei, compress_type); } else { - page = find_get_page(inode->i_mapping, - start >> PAGE_SHIFT); + page = find_get_page(inode->i_mapping, 0); btrfs_set_file_extent_compression(leaf, ei, 0); kaddr = kmap_atomic(page); - offset = offset_in_page(start); - write_extent_buffer(leaf, kaddr + offset, ptr, size); + write_extent_buffer(leaf, kaddr, ptr, size); kunmap_atomic(kaddr); put_page(page); } @@ -281,8 +280,8 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, * We align size to sectorsize for inline extents just for simplicity * sake. */ - size = ALIGN(size, root->fs_info->sectorsize); - ret = btrfs_inode_set_file_extent_range(BTRFS_I(inode), start, size); + ret = btrfs_inode_set_file_extent_range(BTRFS_I(inode), 0, + ALIGN(size, root->fs_info->sectorsize)); if (ret) goto fail; @@ -295,7 +294,13 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, * before we unlock the pages. Otherwise we * could end up racing with unlink. */ - BTRFS_I(inode)->disk_i_size = inode->i_size; + i_size = i_size_read(inode); + if (update_i_size && size > i_size) { + i_size_write(inode, size); + i_size = size; + } + BTRFS_I(inode)->disk_i_size = i_size; + fail: return ret; } @@ -306,35 +311,31 @@ static int insert_inline_extent(struct btrfs_trans_handle *trans, * does the checks required to make sure the data is small enough * to fit as an inline extent. */ -static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 start, - u64 end, size_t compressed_size, +static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 size, + size_t compressed_size, int compress_type, - struct page **compressed_pages) + struct page **compressed_pages, + bool update_i_size) { struct btrfs_drop_extents_args drop_args = { 0 }; struct btrfs_root *root = inode->root; struct btrfs_fs_info *fs_info = root->fs_info; struct btrfs_trans_handle *trans; - u64 isize = i_size_read(&inode->vfs_inode); - u64 actual_end = min(end + 1, isize); - u64 inline_len = actual_end - start; - u64 aligned_end = ALIGN(end, fs_info->sectorsize); - u64 data_len = inline_len; + u64 data_len = compressed_size ? compressed_size : size; int ret; struct btrfs_path *path; - if (compressed_size) - data_len = compressed_size; - - if (start > 0 || - actual_end > fs_info->sectorsize || + /* + * We can create an inline extent if it ends at or beyond the current + * i_size, is no larger than a sector (decompressed), and the (possibly + * compressed) data fits in a leaf and the configured maximum inline + * size. + */ + if (size < i_size_read(&inode->vfs_inode) || + size > fs_info->sectorsize || data_len > BTRFS_MAX_INLINE_DATA_SIZE(fs_info) || - (!compressed_size && - (actual_end & (fs_info->sectorsize - 1)) == 0) || - end + 1 < isize || - data_len > fs_info->max_inline) { + data_len > fs_info->max_inline) return 1; - } path = btrfs_alloc_path(); if (!path) @@ -348,30 +349,21 @@ static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 start, trans->block_rsv = &inode->block_rsv; drop_args.path = path; - drop_args.start = start; - drop_args.end = aligned_end; + drop_args.start = 0; + drop_args.end = fs_info->sectorsize; drop_args.drop_cache = true; drop_args.replace_extent = true; - - if (compressed_size && compressed_pages) - drop_args.extent_item_size = btrfs_file_extent_calc_inline_size( - compressed_size); - else - drop_args.extent_item_size = btrfs_file_extent_calc_inline_size( - inline_len); - + drop_args.extent_item_size = btrfs_file_extent_calc_inline_size(data_len); ret = btrfs_drop_extents(trans, root, inode, &drop_args); if (ret) { btrfs_abort_transaction(trans, ret); goto out; } - if (isize > actual_end) - inline_len = min_t(u64, isize, actual_end); - ret = insert_inline_extent(trans, path, drop_args.extent_inserted, - root, &inode->vfs_inode, start, - inline_len, compressed_size, - compress_type, compressed_pages); + ret = insert_inline_extent(trans, path, drop_args.extent_inserted, root, + &inode->vfs_inode, size, compressed_size, + compress_type, compressed_pages, + update_i_size); if (ret && ret != -ENOSPC) { btrfs_abort_transaction(trans, ret); goto out; @@ -380,7 +372,7 @@ static noinline int cow_file_range_inline(struct btrfs_inode *inode, u64 start, goto out; } - btrfs_update_inode_bytes(inode, inline_len, drop_args.bytes_found); + btrfs_update_inode_bytes(inode, size, drop_args.bytes_found); ret = btrfs_update_inode(trans, root, inode); if (ret && ret != -ENOSPC) { btrfs_abort_transaction(trans, ret); @@ -661,14 +653,15 @@ static noinline int compress_file_range(struct async_chunk *async_chunk) /* we didn't compress the entire range, try * to make an uncompressed inline extent. */ - ret = cow_file_range_inline(BTRFS_I(inode), start, end, + ret = cow_file_range_inline(BTRFS_I(inode), actual_end, 0, BTRFS_COMPRESS_NONE, - NULL); + NULL, false); } else { /* try making a compressed inline extent */ - ret = cow_file_range_inline(BTRFS_I(inode), start, end, + ret = cow_file_range_inline(BTRFS_I(inode), actual_end, total_compressed, - compress_type, pages); + compress_type, pages, + false); } if (ret <= 0) { unsigned long clear_flags = EXTENT_DELALLOC | @@ -1056,9 +1049,12 @@ static noinline int cow_file_range(struct btrfs_inode *inode, inode_should_defrag(inode, start, end, num_bytes, SZ_64K); if (start == 0) { + u64 actual_end = min_t(u64, i_size_read(&inode->vfs_inode), + end + 1); + /* lets try to make an inline extent */ - ret = cow_file_range_inline(inode, start, end, 0, - BTRFS_COMPRESS_NONE, NULL); + ret = cow_file_range_inline(inode, actual_end, 0, + BTRFS_COMPRESS_NONE, NULL, false); if (ret == 0) { /* * We use DO_ACCOUNTING here because we need the