From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from dggsgout12.his.huawei.com (unknown [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 5912D14F61; Tue, 2 Jan 2024 12:42:18 +0000 (UTC) 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 [172.19.163.216]) by dggsgout12.his.huawei.com (SkyGuard) with ESMTP id 4T4CD42tJgz4f3kFq; Tue, 2 Jan 2024 20:42:12 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.128]) by mail.maildlp.com (Postfix) with ESMTP id A2A581A09EB; Tue, 2 Jan 2024 20:42:15 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP4 (Coremail) with SMTP id gCh0CgBnwUGUBJRl+EvDFQ--.31823S23; Tue, 02 Jan 2024 20:42:15 +0800 (CST) From: Zhang Yi 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, willy@infradead.org, yi.zhang@huawei.com, yi.zhang@huaweicloud.com, chengzhihao1@huawei.com, yukuai3@huawei.com, wangkefeng.wang@huawei.com Subject: [RFC PATCH v2 19/25] ext4: implement mmap iomap path Date: Tue, 2 Jan 2024 20:39:12 +0800 Message-Id: <20240102123918.799062-20-yi.zhang@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240102123918.799062-1-yi.zhang@huaweicloud.com> References: <20240102123918.799062-1-yi.zhang@huaweicloud.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID:gCh0CgBnwUGUBJRl+EvDFQ--.31823S23 X-Coremail-Antispam: 1UD129KBjvJXoW7ZrykWr13Gr1xKryUJw1kZrb_yoW8Ar4fpF 9akrWrGr47XwnF9FsagFs8ZryYya4rWr4UXry3GFn5ZrnrZw15ta18GF1rZF45J3yxXr40 qF4Fkry8u34akrDanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUPI14x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_JF0E3s1l82xGYI kIc2x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2 z4x0Y4vE2Ix0cI8IcVAFwI0_tr0E3s1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F 4UJwA2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq 3wAS0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7 IYx2IY67AKxVWUXVWUAwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4U M4x0Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2 kIc2xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E 14v26r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Jw0_GFylIx kGc2Ij64vIr41lIxAIcVC0I7IYx2IY67AKxVW8JVW5JwCI42IY6xIIjxv20xvEc7CjxVAF wI0_Gr1j6F4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Gr 0_Cr1lIxAIcVC2z280aVCY1x0267AKxVW8Jr0_Cr1UYxBIdaVFxhVjvjDU0xZFpf9x0JUl 2NtUUUUU= X-CM-SenderInfo: d1lo6xhdqjqx5xdzvxpfor3voofrz/ From: Zhang Yi Implement mmap iomap path, add ext4_iomap_page_mkwrite() to map blocks and dirty folio, almost everying have been done in iomap_page_mkwrite(), so invoke it directly. Signed-off-by: Zhang Yi --- fs/ext4/inode.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c22b49521df2..ec390bb59b6b 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -6401,6 +6401,26 @@ static int ext4_bh_unmapped(handle_t *handle, struct inode *inode, return !buffer_mapped(bh); } +static vm_fault_t ext4_iomap_page_mkwrite(struct vm_fault *vmf) +{ + struct inode *inode = file_inode(vmf->vma->vm_file); + const struct iomap_ops *iomap_ops; + + /* + * ext4_nonda_switch() could writeback this folio, so have to + * call it before lock folio. + * + * TODO: drop ext4_nonda_switch() after reserving enough sapce + * for metadata and merge delalloc and nodelalloc operations. + */ + if (test_opt(inode->i_sb, DELALLOC) && !ext4_nonda_switch(inode->i_sb)) + iomap_ops = &ext4_iomap_buffered_da_write_ops; + else + iomap_ops = &ext4_iomap_buffered_write_ops; + + return iomap_page_mkwrite(vmf, iomap_ops); +} + vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; @@ -6424,6 +6444,11 @@ vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf) filemap_invalidate_lock_shared(mapping); + if (ext4_test_inode_state(inode, EXT4_STATE_BUFFERED_IOMAP)) { + ret = ext4_iomap_page_mkwrite(vmf); + goto out; + } + err = ext4_convert_inline_data(inode); if (err) goto out_ret; -- 2.39.2