From nobody Thu Apr 2 18:54:54 2026 Received: from dggsgout12.his.huawei.com (dggsgout12.his.huawei.com [45.249.212.56]) (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 4D9833A5E70; Fri, 27 Mar 2026 10:34:34 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.249.212.56 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774607678; cv=none; b=XRVdGPiB3tYJo2PlFoS/ZhK6d5jit7kY1I52mHmsMrn39J3Dk0E1L4FbhaFL8JxWqQ/w7jkQCMzYSuNHPlDNgxgmYgYJT/IvmKiXlT7lAVcPEAdnR4ontzN3PBeihF8JRKXHNnD18bKohhM2nKZHTI0OhdnShWFDW0misFZ57VU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774607678; c=relaxed/simple; bh=viFvCHynwN2QwKfgVv4CMz86s7mPdhW8AzLlTm4Rt7I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=k/ki/vktIpdWPB3NDl2R5J2dKNcGreY/U5xwGi/qK9inkIW8JYIR1ETqPKJ8F7Uu5ftJz8p4IYRp8jku5zOCs6NjVxDora+h3fddbEuMi3chOvEn0SJQqcEEYt5zotVq4ptUzakQvL9UUTpXf1uMSyPp82W1C3fz/aDJPShptjs= 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=45.249.212.56 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 [172.19.163.170]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTPS id 4fhxnp1kCwzKHMRM; Fri, 27 Mar 2026 18:33:50 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id E23E740562; Fri, 27 Mar 2026 18:34:31 +0800 (CST) Received: from huaweicloud.com (unknown [10.50.85.155]) by APP1 (Coremail) with SMTP id cCh0CgC3utouXcZp_T2cCQ--.28730S5; Fri, 27 Mar 2026 18:34:31 +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, ojaswin@linux.ibm.com, ritesh.list@gmail.com, libaokun@linux.alibaba.com, yi.zhang@huawei.com, yi.zhang@huaweicloud.com, yizhang089@gmail.com, yangerkun@huawei.com, yukuai@fnnas.com Subject: [PATCH v4 01/13] ext4: add did_zero output parameter to ext4_block_zero_page_range() Date: Fri, 27 Mar 2026 18:29:27 +0800 Message-ID: <20260327102939.1095257-2-yi.zhang@huaweicloud.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260327102939.1095257-1-yi.zhang@huaweicloud.com> References: <20260327102939.1095257-1-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: cCh0CgC3utouXcZp_T2cCQ--.28730S5 X-Coremail-Antispam: 1UD129KBjvJXoWxCF17XryfAw18KF1rKw15Jwb_yoW5uw1xpr y5t345ur47u34q9F4xWF1jvr1Sk3Z3GFW8W3y3G3s0v3yIq3WxKF95K3WFvF4jg3y7Xay0 qF4Yy3y2gw1UArJanT9S1TB71UUUUU7qnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUm014x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26r4j6ryUM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUGVWUXwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2 xKxwCY1x0262kKe7AKxVWUtVW8ZwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWU JVW8JwC20s026c02F40E14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67 kF1VAFwI0_Jw0_GFylIxkGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVWUJVWUCwCI42IY 6xIIjxv20xvEc7CjxVAFwI0_Gr0_Cr1lIxAIcVCF04k26cxKx2IYs7xG6r1j6r1xMIIF0x vEx4A2jsIE14v26r1j6r4UMIIF0xvEx4A2jsIEc7CjxVAFwI0_Gr0_Gr1UYxBIdaVFxhVj vjDU0xZFpf9x0JUfKs8UUUUU= X-CM-SenderInfo: d1lo6xhdqjqx5xdzvxpfor3voofrz/ Content-Type: text/plain; charset="utf-8" From: Zhang Yi Add a bool *did_zero output parameter to ext4_block_zero_page_range() and __ext4_block_zero_page_range(). The parameter reports whether a partial block was zeroed out, which is needed for the upcoming iomap buffered I/O conversion. Signed-off-by: Zhang Yi Reviewed-by: Jan Kara --- fs/ext4/inode.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index af6d1759c8de..1c9474d5d11d 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -4003,7 +4003,8 @@ void ext4_set_aops(struct inode *inode) * racing writeback can come later and flush the stale pagecache to disk. */ static int __ext4_block_zero_page_range(handle_t *handle, - struct address_space *mapping, loff_t from, loff_t length) + struct address_space *mapping, loff_t from, loff_t length, + bool *did_zero) { unsigned int offset, blocksize, pos; ext4_lblk_t iblock; @@ -4091,6 +4092,8 @@ static int __ext4_block_zero_page_range(handle_t *han= dle, err =3D ext4_jbd2_inode_add_write(handle, inode, from, length); } + if (!err && did_zero) + *did_zero =3D true; =20 unlock: folio_unlock(folio); @@ -4106,7 +4109,8 @@ static int __ext4_block_zero_page_range(handle_t *han= dle, * that corresponds to 'from' */ static int ext4_block_zero_page_range(handle_t *handle, - struct address_space *mapping, loff_t from, loff_t length) + struct address_space *mapping, loff_t from, loff_t length, + bool *did_zero) { struct inode *inode =3D mapping->host; unsigned blocksize =3D inode->i_sb->s_blocksize; @@ -4120,10 +4124,11 @@ static int ext4_block_zero_page_range(handle_t *han= dle, length =3D max; =20 if (IS_DAX(inode)) { - return dax_zero_range(inode, from, length, NULL, + return dax_zero_range(inode, from, length, did_zero, &ext4_iomap_ops); } - return __ext4_block_zero_page_range(handle, mapping, from, length); + return __ext4_block_zero_page_range(handle, mapping, from, length, + did_zero); } =20 /* @@ -4146,7 +4151,7 @@ static int ext4_block_truncate_page(handle_t *handle, blocksize =3D i_blocksize(inode); length =3D blocksize - (from & (blocksize - 1)); =20 - return ext4_block_zero_page_range(handle, mapping, from, length); + return ext4_block_zero_page_range(handle, mapping, from, length, NULL); } =20 int ext4_zero_partial_blocks(handle_t *handle, struct inode *inode, @@ -4169,13 +4174,13 @@ int ext4_zero_partial_blocks(handle_t *handle, stru= ct inode *inode, if (start =3D=3D end && (partial_start || (partial_end !=3D sb->s_blocksize - 1))) { err =3D ext4_block_zero_page_range(handle, mapping, - lstart, length); + lstart, length, NULL); return err; } /* Handle partial zero out on the start of the range */ if (partial_start) { - err =3D ext4_block_zero_page_range(handle, mapping, - lstart, sb->s_blocksize); + err =3D ext4_block_zero_page_range(handle, mapping, lstart, + sb->s_blocksize, NULL); if (err) return err; } @@ -4183,7 +4188,7 @@ int ext4_zero_partial_blocks(handle_t *handle, struct= inode *inode, if (partial_end !=3D sb->s_blocksize - 1) err =3D ext4_block_zero_page_range(handle, mapping, byte_end - partial_end, - partial_end + 1); + partial_end + 1, NULL); return err; } =20 --=20 2.52.0