From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 52316C433EF for ; Fri, 15 Apr 2022 12:42:58 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4KfwwK0FJBz3fVV for ; Fri, 15 Apr 2022 22:42:57 +1000 (AEST) Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=linux.alibaba.com (client-ip=115.124.30.45; helo=out30-45.freemail.mail.aliyun.com; envelope-from=jefflexu@linux.alibaba.com; receiver=) Received: from out30-45.freemail.mail.aliyun.com (out30-45.freemail.mail.aliyun.com [115.124.30.45]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4KfwnK0N5Cz3dvP for ; Fri, 15 Apr 2022 22:36:52 +1000 (AEST) X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R601e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=e01e04426; MF=jefflexu@linux.alibaba.com; NM=1; PH=DS; RN=19; SR=0; TI=SMTPD_---0VA7Ug2g_1650026202; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0VA7Ug2g_1650026202) by smtp.aliyun-inc.com(127.0.0.1); Fri, 15 Apr 2022 20:36:43 +0800 From: Jeffle Xu To: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org Subject: [PATCH v9 17/21] erofs: implement fscache-based metadata read Date: Fri, 15 Apr 2022 20:36:10 +0800 Message-Id: <20220415123614.54024-18-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220415123614.54024-1-jefflexu@linux.alibaba.com> References: <20220415123614.54024-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-erofs@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Development of Linux EROFS file system List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: gregkh@linuxfoundation.org, fannaihao@baidu.com, willy@infradead.org, linux-kernel@vger.kernel.org, tianzichen@kuaishou.com, joseph.qi@linux.alibaba.com, zhangjiachen.jaycee@bytedance.com, linux-fsdevel@vger.kernel.org, luodaowen.backend@bytedance.com, gerry@linux.alibaba.com, torvalds@linux-foundation.org Errors-To: linux-erofs-bounces+linux-erofs=archiver.kernel.org@lists.ozlabs.org Sender: "Linux-erofs" Implement the data plane of reading metadata from primary data blob over fscache. Signed-off-by: Jeffle Xu --- fs/erofs/data.c | 19 +++++++++++++++---- fs/erofs/fscache.c | 27 +++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 4 deletions(-) diff --git a/fs/erofs/data.c b/fs/erofs/data.c index 14b64d960541..bb9c1fd48c19 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -6,6 +6,7 @@ */ #include "internal.h" #include +#include #include #include @@ -35,14 +36,20 @@ void *erofs_bread(struct erofs_buf *buf, struct inode *inode, erofs_off_t offset = blknr_to_addr(blkaddr); pgoff_t index = offset >> PAGE_SHIFT; struct page *page = buf->page; + struct folio *folio; + unsigned int nofs_flag; if (!page || page->index != index) { erofs_put_metabuf(buf); - page = read_cache_page_gfp(mapping, index, - mapping_gfp_constraint(mapping, ~__GFP_FS)); - if (IS_ERR(page)) - return page; + + nofs_flag = memalloc_nofs_save(); + folio = read_cache_folio(mapping, index, NULL, NULL); + memalloc_nofs_restore(nofs_flag); + if (IS_ERR(folio)) + return folio; + /* should already be PageUptodate, no need to lock page */ + page = folio_file_page(folio, index); buf->page = page; } if (buf->kmap_type == EROFS_NO_KMAP) { @@ -63,6 +70,10 @@ void *erofs_bread(struct erofs_buf *buf, struct inode *inode, void *erofs_read_metabuf(struct erofs_buf *buf, struct super_block *sb, erofs_blk_t blkaddr, enum erofs_kmap_type type) { + if (erofs_is_fscache_mode(sb)) + return erofs_bread(buf, EROFS_SB(sb)->s_fscache->inode, + blkaddr, type); + return erofs_bread(buf, sb->s_bdev->bd_inode, blkaddr, type); } diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index 066f68c062e2..3f00eb34ac35 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -58,7 +58,34 @@ static int erofs_fscache_read_folios(struct fscache_cookie *cookie, return ret; } +static int erofs_fscache_meta_readpage(struct file *data, struct page *page) +{ + int ret; + struct folio *folio = page_folio(page); + struct super_block *sb = folio_mapping(folio)->host->i_sb; + struct erofs_map_dev mdev = { + .m_deviceid = 0, + .m_pa = folio_pos(folio), + }; + + ret = erofs_map_dev(sb, &mdev); + if (ret) + goto out; + + ret = erofs_fscache_read_folios(mdev.m_fscache->cookie, + folio_mapping(folio), folio_pos(folio), + folio_size(folio), mdev.m_pa); + if (ret) + goto out; + + folio_mark_uptodate(folio); +out: + folio_unlock(folio); + return ret; +} + static const struct address_space_operations erofs_fscache_meta_aops = { + .readpage = erofs_fscache_meta_readpage, }; /* -- 2.27.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D2B8FC433F5 for ; Fri, 15 Apr 2022 12:37:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1353800AbiDOMjv (ORCPT ); Fri, 15 Apr 2022 08:39:51 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40384 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1345514AbiDOMj2 (ORCPT ); Fri, 15 Apr 2022 08:39:28 -0400 Received: from out30-43.freemail.mail.aliyun.com (out30-43.freemail.mail.aliyun.com [115.124.30.43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AE7F9C8BCE; Fri, 15 Apr 2022 05:36:48 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R601e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04426;MF=jefflexu@linux.alibaba.com;NM=1;PH=DS;RN=19;SR=0;TI=SMTPD_---0VA7Ug2g_1650026202; Received: from localhost(mailfrom:jefflexu@linux.alibaba.com fp:SMTPD_---0VA7Ug2g_1650026202) by smtp.aliyun-inc.com(127.0.0.1); Fri, 15 Apr 2022 20:36:43 +0800 From: Jeffle Xu To: dhowells@redhat.com, linux-cachefs@redhat.com, xiang@kernel.org, chao@kernel.org, linux-erofs@lists.ozlabs.org Cc: torvalds@linux-foundation.org, gregkh@linuxfoundation.org, willy@infradead.org, linux-fsdevel@vger.kernel.org, joseph.qi@linux.alibaba.com, bo.liu@linux.alibaba.com, tao.peng@linux.alibaba.com, gerry@linux.alibaba.com, eguan@linux.alibaba.com, linux-kernel@vger.kernel.org, luodaowen.backend@bytedance.com, tianzichen@kuaishou.com, fannaihao@baidu.com, zhangjiachen.jaycee@bytedance.com Subject: [PATCH v9 17/21] erofs: implement fscache-based metadata read Date: Fri, 15 Apr 2022 20:36:10 +0800 Message-Id: <20220415123614.54024-18-jefflexu@linux.alibaba.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220415123614.54024-1-jefflexu@linux.alibaba.com> References: <20220415123614.54024-1-jefflexu@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org Implement the data plane of reading metadata from primary data blob over fscache. Signed-off-by: Jeffle Xu --- fs/erofs/data.c | 19 +++++++++++++++---- fs/erofs/fscache.c | 27 +++++++++++++++++++++++++++ 2 files changed, 42 insertions(+), 4 deletions(-) diff --git a/fs/erofs/data.c b/fs/erofs/data.c index 14b64d960541..bb9c1fd48c19 100644 --- a/fs/erofs/data.c +++ b/fs/erofs/data.c @@ -6,6 +6,7 @@ */ #include "internal.h" #include +#include #include #include @@ -35,14 +36,20 @@ void *erofs_bread(struct erofs_buf *buf, struct inode *inode, erofs_off_t offset = blknr_to_addr(blkaddr); pgoff_t index = offset >> PAGE_SHIFT; struct page *page = buf->page; + struct folio *folio; + unsigned int nofs_flag; if (!page || page->index != index) { erofs_put_metabuf(buf); - page = read_cache_page_gfp(mapping, index, - mapping_gfp_constraint(mapping, ~__GFP_FS)); - if (IS_ERR(page)) - return page; + + nofs_flag = memalloc_nofs_save(); + folio = read_cache_folio(mapping, index, NULL, NULL); + memalloc_nofs_restore(nofs_flag); + if (IS_ERR(folio)) + return folio; + /* should already be PageUptodate, no need to lock page */ + page = folio_file_page(folio, index); buf->page = page; } if (buf->kmap_type == EROFS_NO_KMAP) { @@ -63,6 +70,10 @@ void *erofs_bread(struct erofs_buf *buf, struct inode *inode, void *erofs_read_metabuf(struct erofs_buf *buf, struct super_block *sb, erofs_blk_t blkaddr, enum erofs_kmap_type type) { + if (erofs_is_fscache_mode(sb)) + return erofs_bread(buf, EROFS_SB(sb)->s_fscache->inode, + blkaddr, type); + return erofs_bread(buf, sb->s_bdev->bd_inode, blkaddr, type); } diff --git a/fs/erofs/fscache.c b/fs/erofs/fscache.c index 066f68c062e2..3f00eb34ac35 100644 --- a/fs/erofs/fscache.c +++ b/fs/erofs/fscache.c @@ -58,7 +58,34 @@ static int erofs_fscache_read_folios(struct fscache_cookie *cookie, return ret; } +static int erofs_fscache_meta_readpage(struct file *data, struct page *page) +{ + int ret; + struct folio *folio = page_folio(page); + struct super_block *sb = folio_mapping(folio)->host->i_sb; + struct erofs_map_dev mdev = { + .m_deviceid = 0, + .m_pa = folio_pos(folio), + }; + + ret = erofs_map_dev(sb, &mdev); + if (ret) + goto out; + + ret = erofs_fscache_read_folios(mdev.m_fscache->cookie, + folio_mapping(folio), folio_pos(folio), + folio_size(folio), mdev.m_pa); + if (ret) + goto out; + + folio_mark_uptodate(folio); +out: + folio_unlock(folio); + return ret; +} + static const struct address_space_operations erofs_fscache_meta_aops = { + .readpage = erofs_fscache_meta_readpage, }; /* -- 2.27.0