From nobody Tue Nov 26 05:50:28 2024 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 52BA61EABBF; Tue, 22 Oct 2024 03:13:07 +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=1729566790; cv=none; b=ZZVlk1jGAWmoMc9Occ9s9XGUJKYxAekEuEsLOHpr3yS1p+brZ5IylKHr4hH2vNKdPzWEbBA8dX1Ew3+Oh4r3t457CX4y3WI7O0aCHz/aZnRJK5yOuhmoUV9XgvRtfYckqjsU4Qbb9HsByCjzcRb8PojW0ebO/3WFpfvI82F3WEM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729566790; c=relaxed/simple; bh=UB+Gs3civCuEYlS4cLJVQslxb6/ZGgNvoifXv/YHRsA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=b0Q5RspfAisFoKguoHd3lfBFAUcipQV7H3H2uImEZM+puS12NRyq53wrZZPQ2Z4PmhL0raJXRheaTiczuPwyrW9M+uFL9Zcj8ncEb09evSU7jpa9Xe1Yg6v5bAleOD7uCKhPeEw+DXE1uziflAGbk72HGUmmqKQ6TKMIdRs9bDI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=huaweicloud.com; spf=pass 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=pass smtp.mailfrom=huaweicloud.com Received: from mail.maildlp.com (unknown [172.19.93.142]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4XXcgL2Rv3z4f3lVv; Tue, 22 Oct 2024 11:12:46 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id 80E2A1A018D; Tue, 22 Oct 2024 11:13:04 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.112.188]) by APP4 (Coremail) with SMTP id gCh0CgCXysYlGBdnPSwWEw--.716S28; Tue, 22 Oct 2024 11:13:04 +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 24/27] ext4: partially enable iomap for the buffered I/O path of regular files Date: Tue, 22 Oct 2024 19:10:55 +0800 Message-ID: <20241022111059.2566137-25-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-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: gCh0CgCXysYlGBdnPSwWEw--.716S28 X-Coremail-Antispam: 1UD129KBjvJXoWxZFy3uF1xur47Wr1UGrW8tFb_yoWrGF15pF ZxKF1rGr4v93s29r4ftF48Zr1av3WxKa1UWrWSgr95XFWUJw1SqF10yF15A3W5JrZ5u34a qF4jkr15uw43urDanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 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/ Content-Type: text/plain; charset="utf-8" From: Zhang Yi Partially enable iomap for the buffered I/O path of regular files with the default mount option. This supports default filesystem features and the bigalloc feature. However, it does not yet support inline data, fs_verity, fs_crypt, online defrag and data=3Djournal mode. Some of these features should be supported gradually in the future. The filesystem will fallback to the buffered_head path automatically if these mount options or features are enabled. Signed-off-by: Zhang Yi --- fs/ext4/ext4.h | 1 + fs/ext4/ialloc.c | 3 +++ fs/ext4/inode.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 36 insertions(+) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index e1b7f7024f07..0096191b454c 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2987,6 +2987,7 @@ int ext4_walk_page_buffers(handle_t *handle, struct buffer_head *bh)); int do_journal_get_write_access(handle_t *handle, struct inode *inode, struct buffer_head *bh); +bool ext4_should_use_buffered_iomap(struct inode *inode); int ext4_nonda_switch(struct super_block *sb); #define FALL_BACK_TO_NONDELALLOC 1 #define CONVERT_INLINE_DATA 2 diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 7f1a5f90dbbd..2e3e257b9808 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -1333,6 +1333,9 @@ struct inode *__ext4_new_inode(struct mnt_idmap *idma= p, } } =20 + if (ext4_should_use_buffered_iomap(inode)) + ext4_set_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP); + ext4_update_inode_fsync_trans(handle, inode, 1); =20 err =3D ext4_mark_inode_dirty(handle, inode); diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 50e4afd17e93..512094dc4117 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -776,6 +776,8 @@ static int _ext4_get_block(struct inode *inode, sector_= t iblock, =20 if (ext4_has_inline_data(inode)) return -ERANGE; + if (WARN_ON(ext4_test_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP))) + return -EINVAL; =20 map.m_lblk =3D iblock; map.m_len =3D bh->b_size >> inode->i_blkbits; @@ -2572,6 +2574,9 @@ static int ext4_do_writepages(struct mpage_da_data *m= pd) =20 trace_ext4_writepages(inode, wbc); =20 + if (WARN_ON(ext4_test_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP))) + return -EINVAL; + /* * No pages to write? This is mainly a kludge to avoid starting * a transaction for special inodes like journal inode on last iput() @@ -5144,6 +5149,30 @@ static const char *check_igot_inode(struct inode *in= ode, ext4_iget_flags flags) return NULL; } =20 +bool ext4_should_use_buffered_iomap(struct inode *inode) +{ + struct super_block *sb =3D inode->i_sb; + + if (ext4_has_feature_inline_data(sb)) + return false; + if (ext4_has_feature_verity(sb)) + return false; + if (test_opt(sb, DATA_FLAGS) =3D=3D EXT4_MOUNT_JOURNAL_DATA) + return false; + if (!S_ISREG(inode->i_mode)) + return false; + if (IS_DAX(inode)) + return false; + if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) + return false; + if (ext4_test_inode_flag(inode, EXT4_INODE_EA_INODE)) + return false; + if (ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT)) + return false; + + return true; +} + struct inode *__ext4_iget(struct super_block *sb, unsigned long ino, ext4_iget_flags flags, const char *function, unsigned int line) @@ -5408,6 +5437,9 @@ struct inode *__ext4_iget(struct super_block *sb, uns= igned long ino, if (ret) goto bad_inode; =20 + if (ext4_should_use_buffered_iomap(inode)) + ext4_set_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP); + if (S_ISREG(inode->i_mode)) { inode->i_op =3D &ext4_file_inode_operations; inode->i_fop =3D &ext4_file_operations; --=20 2.46.1