Received-SPF: pass (google.com: domain of linux-ext4+bounces-114-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45e3:2400::1 as permitted sender) client-ip=2604:1380:45e3:2400::1;
From: Zhang Yi <yi.zhang@huaweicloud.com>
To: linux-ext4@vger.kernel.org
Cc: linux-fsdevel@vger.kernel.org,
	tytso@mit.edu,
	adilger.kernel@dilger.ca,
	jack@suse.cz,
	ritesh.list@gmail.com,
	hch@infradead.org,
	djwong@kernel.org,
	yi.zhang@huawei.com,
	yi.zhang@huaweicloud.com,
	chengzhihao1@huawei.com,
	yukuai3@huawei.com
Subject: [RFC PATCH 14/18] ext4: impliment zero_range iomap path
Date: Thu, 23 Nov 2023 20:51:16 +0800
Message-Id: <20231123125121.4064694-15-yi.zhang@huaweicloud.com>
In-Reply-To: <20231123125121.4064694-1-yi.zhang@huaweicloud.com>
References: <20231123125121.4064694-1-yi.zhang@huaweicloud.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

From: Zhang Yi <yi.zhang@huawei.com>

Impliment zero_range iomap path, direct use iomap_zero_range() and add a
branch in ext4_block_zero_page_range().

Signed-off-by: Zhang Yi <yi.zhang@huawei.com>
---
 fs/ext4/inode.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index f72864b9a6b3..ca66afd61fb3 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4218,6 +4218,13 @@ static int __ext4_block_zero_page_range(handle_t *handle,
 	return err;
 }
 
+static int ext4_iomap_zero_range(struct inode *inode,
+				 loff_t from, loff_t length)
+{
+	return iomap_zero_range(inode, from, length, NULL,
+				&ext4_iomap_buffered_write_ops);
+}
+
 /*
  * ext4_block_zero_page_range() zeros out a mapping of length 'length'
  * starting from file offset 'from'.  The range to be zero'd must
@@ -4243,6 +4250,8 @@ static int ext4_block_zero_page_range(handle_t *handle,
 	if (IS_DAX(inode)) {
 		return dax_zero_range(inode, from, length, NULL,
 				      &ext4_iomap_ops);
+	} else if (ext4_test_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP)) {
+		return ext4_iomap_zero_range(inode, from, length);
 	}
 	return __ext4_block_zero_page_range(handle, mapping, from, length);
 }
-- 
2.39.2