From patchwork Tue Oct 22 11:10:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Yi X-Patchwork-Id: 13845038 Received: from dggsgout11.his.huawei.com (dggsgout11.his.huawei.com [45.249.212.51]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5570E200109; Tue, 22 Oct 2024 03:13:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.51 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729566791; cv=none; b=RcRw68I1MAid/0YhzUg9G12DApj7fBrxGxqxAUT9ZbXZFq4B4FmoyJLQTzwgqF3wUD2zrkxmJ+rOnY9hyCHqdHVdru+9kvsnDKpfsZDDOAfB9w0mC/mgRoOrPBq6sIdqwO21NUD5Vq3RJvZb9vN+yZmG3CBrELCd0J5CQ0l9PUw= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729566791; c=relaxed/simple; bh=OAzCCl3m2q23m1U+qcLkhExvUHjt8Ff1nVP57Z12V6I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=ISr+Zrdmrj/8Fcl4/paJCjDmHkYROINytjIcGVczotiiYIuVgDxxxFMMu9w+7sTG0yLRUUnK/F/81M2z+StNahAdRYW/WVwYDnow8hW4CrJLqCgGhdpkWfGAbymqfqlyc97KJliDmQWe2Zdk+gB41hLQ1MglNKbIKOHvhGNPqv4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=none smtp.mailfrom=huaweicloud.com; arc=none smtp.client-ip=45.249.212.51 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.163.235]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4XXcgN1lZBz4f3lVx; Tue, 22 Oct 2024 11:12:48 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 67C5D1A058E; Tue, 22 Oct 2024 11:13:06 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.112.188]) by APP4 (Coremail) with SMTP id gCh0CgCXysYlGBdnPSwWEw--.716S31; Tue, 22 Oct 2024 11:13:06 +0800 (CST) From: Zhang Yi To: linux-ext4@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, jack@suse.cz, ritesh.list@gmail.com, hch@infradead.org, djwong@kernel.org, david@fromorbit.com, zokeefe@google.com, yi.zhang@huawei.com, yi.zhang@huaweicloud.com, chengzhihao1@huawei.com, yukuai3@huawei.com, yangerkun@huawei.com Subject: [PATCH 27/27] ext4: introduce a mount option for iomap buffered I/O path Date: Tue, 22 Oct 2024 19:10:58 +0800 Message-ID: <20241022111059.2566137-28-yi.zhang@huaweicloud.com> X-Mailer: git-send-email 2.46.1 In-Reply-To: <20241022111059.2566137-1-yi.zhang@huaweicloud.com> References: <20241022111059.2566137-1-yi.zhang@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-CM-TRANSID: gCh0CgCXysYlGBdnPSwWEw--.716S31 X-Coremail-Antispam: 1UD129KBjvJXoWxZrW3WFyrtryxWF4xKw1rWFg_yoW5Cr18p3 sYkFy8Gr1kZr1F93y8CF48Wr1FkF4Yka1UuFWYgw17WFZrAryxXFyfKF1rCF42qrW8XryI gF1rWw17WF43CrDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUQm14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2jI8I6cxK62vIxIIY0VWUZVW8XwA2048vs2IY02 0E87I2jVAFwI0_JF0E3s1l82xGYIkIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0 rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6x IIjxv20xvEc7CjxVAFwI0_GcCE3s1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vE x4A2jsIEc7CjxVAFwI0_GcCE3s1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2 IEw4CE5I8CrVC2j2WlYx0E2Ix0cI8IcVAFwI0_JrI_JrylYx0Ex4A2jsIE14v26r1j6r4U McvjeVCFs4IE7xkEbVWUJVW8JwACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I64 8v4I1lFIxGxcIEc7CjxVA2Y2ka0xkIwI1lc7CjxVAaw2AFwI0_Jw0_GFyl42xK82IYc2Ij 64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s026x 8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r4a6rW5MIIYrxkI7VAKI48JMIIF0xvE 2Ix0cI8IcVAFwI0_Xr0_Ar1lIxAIcVC0I7IYx2IY6xkF7I0E14v26r4UJVWxJr1lIxAIcV CF04k26cxKx2IYs7xG6r1j6r1xMIIF0xvEx4A2jsIE14v26r4j6F4UMIIF0xvEx4A2jsIE c7CjxVAFwI0_Gr1j6F4UJbIYCTnIWIevJa73UjIFyTuYvjTRio7uDUUUU X-CM-SenderInfo: d1lo6xhdqjqx5xdzvxpfor3voofrz/ From: Zhang Yi Introduce the buffered_iomap and the nobuffered_iomap mount options to enable the iomap buffered I/O path for regular files. This option is currently disabled by default until we can support more comprehensive features along this path. Signed-off-by: Zhang Yi --- fs/ext4/ext4.h | 1 + fs/ext4/inode.c | 2 ++ fs/ext4/super.c | 7 +++++++ 3 files changed, 10 insertions(+) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 0096191b454c..c2a44530e026 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -1257,6 +1257,7 @@ struct ext4_inode_info { * scanning in mballoc */ #define EXT4_MOUNT2_ABORT 0x00000100 /* Abort filesystem */ +#define EXT4_MOUNT2_BUFFERED_IOMAP 0x00000200 /* Use iomap for buffered IO */ #define clear_opt(sb, opt) EXT4_SB(sb)->s_mount_opt &= \ ~EXT4_MOUNT_##opt diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 97abc88e6658..b6e041a423f9 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5153,6 +5153,8 @@ bool ext4_should_use_buffered_iomap(struct inode *inode) { struct super_block *sb = inode->i_sb; + if (!test_opt2(sb, BUFFERED_IOMAP)) + return false; if (ext4_has_feature_inline_data(sb)) return false; if (ext4_has_feature_verity(sb)) diff --git a/fs/ext4/super.c b/fs/ext4/super.c index 89955081c4fe..435a866359d9 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -1675,6 +1675,7 @@ enum { Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, Opt_max_dir_size_kb, Opt_nojournal_checksum, Opt_nombcache, Opt_no_prefetch_block_bitmaps, Opt_mb_optimize_scan, + Opt_buffered_iomap, Opt_nobuffered_iomap, Opt_errors, Opt_data, Opt_data_err, Opt_jqfmt, Opt_dax_type, #ifdef CONFIG_EXT4_DEBUG Opt_fc_debug_max_replay, Opt_fc_debug_force @@ -1806,6 +1807,8 @@ static const struct fs_parameter_spec ext4_param_specs[] = { fsparam_flag("no_prefetch_block_bitmaps", Opt_no_prefetch_block_bitmaps), fsparam_s32("mb_optimize_scan", Opt_mb_optimize_scan), + fsparam_flag("buffered_iomap", Opt_buffered_iomap), + fsparam_flag("nobuffered_iomap", Opt_nobuffered_iomap), fsparam_string("check", Opt_removed), /* mount option from ext2/3 */ fsparam_flag("nocheck", Opt_removed), /* mount option from ext2/3 */ fsparam_flag("reservation", Opt_removed), /* mount option from ext2/3 */ @@ -1900,6 +1903,10 @@ static const struct mount_opts { {Opt_nombcache, EXT4_MOUNT_NO_MBCACHE, MOPT_SET}, {Opt_no_prefetch_block_bitmaps, EXT4_MOUNT_NO_PREFETCH_BLOCK_BITMAPS, MOPT_SET}, + {Opt_buffered_iomap, EXT4_MOUNT2_BUFFERED_IOMAP, + MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY}, + {Opt_nobuffered_iomap, EXT4_MOUNT2_BUFFERED_IOMAP, + MOPT_CLEAR | MOPT_2 | MOPT_EXT4_ONLY}, #ifdef CONFIG_EXT4_DEBUG {Opt_fc_debug_force, EXT4_MOUNT2_JOURNAL_FAST_COMMIT, MOPT_SET | MOPT_2 | MOPT_EXT4_ONLY},