From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=95.215.58.165 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1794553624; b=Y4+s68VpQUemqfp+/oe3M4fANSPI1vcz/YWJnDXFtnzHmoep2dgNrxsXyr2/X63N6HYR tFf2r8prgP4/sMRfkZyvU6hHg1DXyEigGapnryhWcUFi6A1ISfdnwL3EhyMNkoCAZQP/r Ki9Zn/+6v6B8bM2Zd3IJjQMITCGsrLGROOk95HxrgfwrpRzgnU/H3jfmFRtxWBBgM15iS tORNvGiaqKoqvkJ8ZSvw7qEaIVKtZSlWQuYZkw8mCUAAeKMHOiwxyYdiK38r/sANeLaFS 57/oTuyvz4M+xQNSBP3RfxGxVaOP4iNIxKRItOieElL7lhBxeRD9abvaDSs6JgGBcsw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1794553624; h=DMARC-Filter:X-Envelope-To:DKIM-Signature:X-Envelope-To:Received: X-Mizu-Trace-ID:X-Migadu-Flow:From:To:Cc:Subject:Date:Message-ID: X-Mailer:In-Reply-To:References:MIME-Version: Content-Transfer-Encoding; bh=ov6PsgY3xDvctn8CEb8PaC1/EQ2eM7GolUa4HZ+7g3w=; b=34G4IWmO6ZS3S/B6WSMPukgbZMPsCzqzJAMkPQ9v2Jt3R+Xvg+y5asw8jbRZ7fr8qyCi rqpl3ut3gZtzr4zye8eP0XvqjNyKIHLgl4OdxHGEmQiIVWk0MGdSRbssyuk88bsm1jM6L G4VnfzccM9/WxE9TZEz5UcAIvsGSOt0wS6rk2cpmK+Z5D5O25/JiZYfDYWtPEErUZJmEs T8M+vaDZsH3zN0fLDJUk6oahQL036po16PYMyeDRYGoxtl53CQjttOM4BUUVC+JnylARN /hFp5zfjHTV9NXYL+cLbyaLituhk5JsKbpWK0aH0Xoeib8Y9xcjs9otShy1Du5ZDVfA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.dev; spf=pass smtp.mailfrom=linux.dev; dkim=pass header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=WoiL4nFY; arc=none smtp.remote-ip=95.215.58.165 Received: from mta1.migadu.com (out-165.mta1.migadu.com [95.215.58.165]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF765606A332 for ; Fri, 13 Nov 2026 07:07:03 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org AF765606A332 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.dev Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.dev Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.dev header.i=@linux.dev header.a=rsa-sha256 header.s=key1 header.b=WoiL4nFY X-Envelope-To: linux-doc@vger.kernel.org DKIM-Signature: a=rsa-sha256; bh=NPYqP2bSnfKk3JDua2A5vqNZ+eJUoj9E6cqywCvpDEg=; c=simple/simple; d=linux.dev; h=from:to:subject:date:message-id:mime-version:content-type; s=key1; t=1794553621; v=1; x=1795158421; b=WoiL4nFYqSHsvmE4p1QJ083qrAUpGTvH/S1yv4RwG/z4XX8GpSyhztH3Wr3BglFxdkbUQZw/ rOS1vbyXeE4ZIDj52UY96CUo/0a4F/AQIJ72/pPDwqsaW7Bn3Ookak8wMAS7ZTNjpjUwebmlpdJ TwP59BLkYUFCSwsQh19BHC+0= X-Envelope-To: linux-doc@vger.kernel.org Received: by smtp.migadu.com with ESMTPS id da2ed9eb902ef4ec; Fri, 13 Nov 2026 07:07:01 +0000 X-Mizu-Trace-ID: da2ed9eb902ef4ec X-Migadu-Flow: FLOW_OUT From: Mengmeng Zhao To: Christoph Hellwig , Anuj Gupta , Nitesh Shetty , Jens Axboe , Sumit Semwal , christian.koenig@amd.com, Philipp Stanner , Dan Williams , Matthew Wilcox , Jan Kara , Alexander Viro , Christian Brauner , tytso@mit.edu, Andreas Dilger , Baokun Li , Ojaswin Mujoo , "Ritesh Harjani (IBM)" , Zhang Yi , asml.silence@gmail.com, Jonathan Corbet , Shuah Khan , Randy Dunlap Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, nvdimm@lists.linux.dev, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, linux-doc@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, Li Wang , Mengmeng Zhao Subject: [RFC PATCH v2 1/8] block: factor out bdev_init_dma_buf_io_ctx() Date: Fri, 13 Nov 2026 15:06:14 +0800 Message-ID: <20261113070621.273953-2-mengmeng.zhao@linux.dev> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20261113070621.273953-1-mengmeng.zhao@linux.dev> References: <20261113070621.273953-1-mengmeng.zhao@linux.dev> X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit From: Nitesh Shetty Factor the checks and the driver setup out of blkdev_init_dma_buf_io_ctx() into an exported helper that takes the block device as an argument, so callers can set up a dma-buf I/O context for any block device. The block device file operation becomes a thin wrapper using file_bdev(), so its behavior is unchanged. Signed-off-by: Nitesh Shetty Signed-off-by: Mengmeng Zhao Signed-off-by: Li Wang --- block/bdev.c | 14 ++++++++++++++ block/fops.c | 12 +----------- include/linux/blkdev.h | 3 +++ 3 files changed, 18 insertions(+), 11 deletions(-) diff --git a/block/bdev.c b/block/bdev.c index f20f91b3176e..88e3f552f5d4 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include #include @@ -60,6 +61,19 @@ struct block_device *file_bdev(struct file *bdev_file) } EXPORT_SYMBOL(file_bdev); +int bdev_init_dma_buf_io_ctx(struct file *file, struct block_device *bdev, + struct dma_buf_io_ctx *ctx) +{ + if (!(file->f_flags & O_DIRECT)) + return -EINVAL; + if (ctx->dmabuf->size > UINT_MAX) + return -EINVAL; + if (!bdev->bd_disk->fops->init_dma_buf_io_ctx) + return -EOPNOTSUPP; + return bdev->bd_disk->fops->init_dma_buf_io_ctx(bdev, ctx); +} +EXPORT_SYMBOL_GPL(bdev_init_dma_buf_io_ctx); + static void bdev_write_inode(struct block_device *bdev) { struct inode *inode = BD_INODE(bdev); diff --git a/block/fops.c b/block/fops.c index a0ccadaa9c79..86bf1f298b79 100644 --- a/block/fops.c +++ b/block/fops.c @@ -19,7 +19,6 @@ #include #include #include -#include #include "blk.h" static inline struct inode *bdev_file_inode(struct file *file) @@ -1009,16 +1008,7 @@ static int blkdev_mmap_prepare(struct vm_area_desc *desc) static int blkdev_init_dma_buf_io_ctx(struct file *file, struct dma_buf_io_ctx *ctx) { - struct block_device *bdev = file_bdev(file); - struct gendisk *disk = bdev->bd_disk; - - if (!(file->f_flags & O_DIRECT)) - return -EINVAL; - if (ctx->dmabuf->size > UINT_MAX) - return -EINVAL; - if (!disk->fops->init_dma_buf_io_ctx) - return -EOPNOTSUPP; - return disk->fops->init_dma_buf_io_ctx(bdev, ctx); + return bdev_init_dma_buf_io_ctx(file, file_bdev(file), ctx); } const struct file_operations def_blk_fops = { diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 215753171cef..b98f43478cc0 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1610,6 +1610,9 @@ struct block_device_operations { int (*alternative_gpt_sector)(struct gendisk *disk, sector_t *sector); }; +int bdev_init_dma_buf_io_ctx(struct file *file, struct block_device *bdev, + struct dma_buf_io_ctx *ctx); + #ifdef CONFIG_COMPAT extern int blkdev_compat_ptr_ioctl(struct block_device *, blk_mode_t, unsigned int, unsigned long); -- 2.43.0