From patchwork Mon Dec 11 14:05:35 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yu Kuai X-Patchwork-Id: 13487245 Received: from dggsgout11.his.huawei.com (unknown [45.249.212.51]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 142BC1BC; Mon, 11 Dec 2023 06:07:23 -0800 (PST) Received: from mail.maildlp.com (unknown [172.19.163.216]) by dggsgout11.his.huawei.com (SkyGuard) with ESMTP id 4Spk8M2xyzz4f3lVW; Mon, 11 Dec 2023 22:07:15 +0800 (CST) Received: from mail02.huawei.com (unknown [10.116.40.112]) by mail.maildlp.com (Postfix) with ESMTP id 466A21A0961; Mon, 11 Dec 2023 22:07:20 +0800 (CST) Received: from huaweicloud.com (unknown [10.175.104.67]) by APP1 (Coremail) with SMTP id cCh0CgDn6xGTF3dlDYFxDQ--.28013S5; Mon, 11 Dec 2023 22:07:19 +0800 (CST) From: Yu Kuai To: axboe@kernel.dk, roger.pau@citrix.com, colyli@suse.de, kent.overstreet@gmail.com, joern@lazybastard.org, miquel.raynal@bootlin.com, richard@nod.at, vigneshr@ti.com, sth@linux.ibm.com, hoeppner@linux.ibm.com, hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, jejb@linux.ibm.com, martin.petersen@oracle.com, clm@fb.com, josef@toxicpanda.com, dsterba@suse.com, viro@zeniv.linux.org.uk, brauner@kernel.org, nico@fluxnic.net, xiang@kernel.org, chao@kernel.org, tytso@mit.edu, adilger.kernel@dilger.ca, agruenba@redhat.com, jack@suse.com, konishi.ryusuke@gmail.com, willy@infradead.org, akpm@linux-foundation.org, p.raghav@samsung.com, hare@suse.de Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org, linux-bcache@vger.kernel.org, linux-mtd@lists.infradead.org, linux-s390@vger.kernel.org, linux-scsi@vger.kernel.org, linux-bcachefs@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-erofs@lists.ozlabs.org, linux-ext4@vger.kernel.org, gfs2@lists.linux.dev, linux-nilfs@vger.kernel.org, yukuai3@huawei.com, yukuai1@huaweicloud.com, yi.zhang@huawei.com, yangerkun@huawei.com Subject: [PATCH RFC v2 for-6.8/block 01/18] block: add some bdev apis Date: Mon, 11 Dec 2023 22:05:35 +0800 Message-Id: <20231211140552.973290-2-yukuai1@huaweicloud.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231211140552.973290-1-yukuai1@huaweicloud.com> References: <20231211140552.973290-1-yukuai1@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: cCh0CgDn6xGTF3dlDYFxDQ--.28013S5 X-Coremail-Antispam: 1UD129KBjvJXoW3Jw4kWFWUAr1DGF1UWF17Wrg_yoW7CryUpF yUGa45JrW5Gw1Igrs2ya13Zryag3W0kF1xZa4xJ34Yk3yktr9agFZ5CwnrArWftrWkAFZr XFya9rWxCr1jkFJanT9S1TB71UUUUUUqnTZGkaVYY2UrUUUUjbIjqfuFe4nvWSU5nxnvy2 9KBjDU0xBIdaVrnRJUUUP014x267AKxVWrJVCq3wAFc2x0x2IEx4CE42xK8VAvwI8IcIk0 rVWrJVCq3wAFIxvE14AKwVWUJVWUGwA2048vs2IY020E87I2jVAFwI0_Jr4l82xGYIkIc2 x26xkF7I0E14v26ryj6s0DM28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8wA2z4x0 Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr1j6F4UJw A2z4x0Y4vEx4A2jsIE14v26rxl6s0DM28EF7xvwVC2z280aVCY1x0267AKxVW0oVCq3wAS 0I0E0xvYzxvE52x082IY62kv0487Mc02F40EFcxC0VAKzVAqx4xG6I80ewAv7VC0I7IYx2 IY67AKxVWUJVWUGwAv7VC2z280aVAFwI0_Jr0_Gr1lOx8S6xCaFVCjc4AY6r1j6r4UM4x0 Y48IcxkI7VAKI48JM4x0x7Aq67IIx4CEVc8vx2IErcIFxwACI402YVCY1x02628vn2kIc2 xKxwCF04k20xvY0x0EwIxGrwCFx2IqxVCFs4IE7xkEbVWUJVW8JwC20s026c02F40E14v2 6r1j6r18MI8I3I0E7480Y4vE14v26r106r1rMI8E67AF67kF1VAFwI0_Wrv_Gr1UMIIYrx kI7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v2 6F4j6r4UJwCI42IY6xAIw20EY4v20xvaj40_Jr0_JF4lIxAIcVC2z280aVAFwI0_Jr0_Gr 1lIxAIcVC2z280aVCY1x0267AKxVW8JVW8JrUvcSsGvfC2KfnxnUUI43ZEXa7VUbpuWJUU UUU== X-CM-SenderInfo: 51xn3trlr6x35dzhxuhorxvhhfrp/ From: Yu Kuai Those apis will be used for other modules, so that bd_inode won't be accessed directly from other modules. Signed-off-by: Yu Kuai --- block/bdev.c | 70 ++++++++++++++++++++++++++++++++++++++++++ block/blk.h | 2 -- include/linux/blkdev.h | 17 ++++++++++ 3 files changed, 87 insertions(+), 2 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index 750aec178b6a..9a469753eb4b 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -89,6 +89,13 @@ void invalidate_bdev(struct block_device *bdev) } EXPORT_SYMBOL(invalidate_bdev); +void invalidate_bdev_range(struct block_device *bdev, pgoff_t start, + pgoff_t end) +{ + invalidate_mapping_pages(bdev->bd_inode->i_mapping, start, end); +} +EXPORT_SYMBOL_GPL(invalidate_bdev_range); + /* * Drop all buffers & page cache for given bdev range. This function bails * with error if bdev has other exclusive owner (such as filesystem). @@ -121,6 +128,7 @@ int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode, lstart >> PAGE_SHIFT, lend >> PAGE_SHIFT); } +EXPORT_SYMBOL_GPL(truncate_bdev_range); static void set_init_blocksize(struct block_device *bdev) { @@ -1102,3 +1110,65 @@ void bdev_statx_dioalign(struct inode *inode, struct kstat *stat) blkdev_put_no_open(bdev); } + +struct folio *bdev_read_folio(struct block_device *bdev, loff_t pos) +{ + return mapping_read_folio_gfp(bdev->bd_inode->i_mapping, + pos >> PAGE_SHIFT, GFP_KERNEL); +} +EXPORT_SYMBOL_GPL(bdev_read_folio); + +struct folio *__bdev_get_folio(struct block_device *bdev, loff_t pos, + fgf_t fgp_flags, gfp_t gfp) +{ + return __filemap_get_folio(bdev->bd_inode->i_mapping, pos >> PAGE_SHIFT, + fgp_flags, gfp); +} +EXPORT_SYMBOL_GPL(__bdev_get_folio); + +int bdev_wb_err_check(struct block_device *bdev, errseq_t since) +{ + return errseq_check(&bdev->bd_inode->i_mapping->wb_err, since); +} +EXPORT_SYMBOL_GPL(bdev_wb_err_check); + +int bdev_wb_err_check_and_advance(struct block_device *bdev, errseq_t *since) +{ + return errseq_check_and_advance(&bdev->bd_inode->i_mapping->wb_err, + since); +} +EXPORT_SYMBOL_GPL(bdev_wb_err_check_and_advance); + +void bdev_balance_dirty_pages_ratelimited(struct block_device *bdev) +{ + return balance_dirty_pages_ratelimited(bdev->bd_inode->i_mapping); +} +EXPORT_SYMBOL_GPL(bdev_balance_dirty_pages_ratelimited); + +void bdev_sync_readahead(struct block_device *bdev, struct file_ra_state *ra, + struct file *file, pgoff_t index, + unsigned long req_count) +{ + struct file_ra_state tmp_ra = {}; + + if (!ra) { + ra = &tmp_ra; + file_ra_state_init(ra, bdev->bd_inode->i_mapping); + } + page_cache_sync_readahead(bdev->bd_inode->i_mapping, ra, file, index, + req_count); +} +EXPORT_SYMBOL_GPL(bdev_sync_readahead); + +void bdev_attach_wb(struct block_device *bdev) +{ + inode_attach_wb(bdev->bd_inode, NULL); +} +EXPORT_SYMBOL_GPL(bdev_attach_wb); + +void bdev_associated_mapping(struct block_device *bdev, + struct address_space *mapping) +{ + mapping->host = bdev->bd_inode; +} +EXPORT_SYMBOL_GPL(bdev_associated_mapping); diff --git a/block/blk.h b/block/blk.h index 08a358bc0919..da4becd4f7e9 100644 --- a/block/blk.h +++ b/block/blk.h @@ -467,8 +467,6 @@ extern struct device_attribute dev_attr_events_poll_msecs; extern struct attribute_group blk_trace_attr_group; blk_mode_t file_to_blk_mode(struct file *file); -int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode, - loff_t lstart, loff_t lend); long blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg); long compat_blkdev_ioctl(struct file *file, unsigned cmd, unsigned long arg); diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 17c0a7d0d319..d2453424a9eb 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -24,6 +24,7 @@ #include #include #include +#include struct module; struct request_queue; @@ -1502,6 +1503,22 @@ struct block_device *blkdev_get_no_open(dev_t dev); void blkdev_put_no_open(struct block_device *bdev); struct block_device *I_BDEV(struct inode *inode); +void invalidate_bdev_range(struct block_device *bdev, pgoff_t start, + pgoff_t end); +int truncate_bdev_range(struct block_device *bdev, blk_mode_t mode, + loff_t lstart, loff_t lend); +struct folio *bdev_read_folio(struct block_device *bdev, loff_t pos); +struct folio *__bdev_get_folio(struct block_device *bdev, loff_t pos, + fgf_t fgp_flags, gfp_t gfp); +int bdev_wb_err_check(struct block_device *bdev, errseq_t since); +int bdev_wb_err_check_and_advance(struct block_device *bdev, errseq_t *since); +void bdev_balance_dirty_pages_ratelimited(struct block_device *bdev); +void bdev_sync_readahead(struct block_device *bdev, struct file_ra_state *ra, + struct file *file, pgoff_t index, + unsigned long req_count); +void bdev_attach_wb(struct block_device *bdev); +void bdev_associated_mapping(struct block_device *bdev, + struct address_space *mapping); #ifdef CONFIG_BLOCK void invalidate_bdev(struct block_device *bdev);