Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751463AbbFYJqb (ORCPT ); Thu, 25 Jun 2015 05:46:31 -0400 Received: from mga14.intel.com ([192.55.52.115]:38740 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751395AbbFYJme (ORCPT ); Thu, 25 Jun 2015 05:42:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,675,1427785200"; d="scan'208";a="514023152" Subject: [PATCH v2 06/17] fs/block_dev.c: skip rw_page if bdev has integrity From: Dan Williams To: linux-nvdimm@ml01.01.org Cc: axboe@kernel.dk, boaz@plexistor.com, toshi.kani@hp.com, "Martin K. Petersen" , Vishal Verma , linux-kernel@vger.kernel.org, mingo@kernel.org, Jens Axboe , linux-acpi@vger.kernel.org, Matthew Wilcox , linux-fsdevel@vger.kernel.org, hch@lst.de Date: Thu, 25 Jun 2015 05:36:50 -0400 Message-ID: <20150625093650.40066.18898.stgit@dwillia2-desk3.jf.intel.com> In-Reply-To: <20150625090554.40066.69562.stgit@dwillia2-desk3.jf.intel.com> References: <20150625090554.40066.69562.stgit@dwillia2-desk3.jf.intel.com> User-Agent: StGit/0.17.1-8-g92dd MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1751 Lines: 46 From: Vishal Verma If a block device has bio integrity enabled, rw_page will bypass the integrity payload, which is undesirable. Skip rw_page if this is the case. Currently brd and zram provide rw_page, and the proposed 'nd' drivers will too. Cc: Jens Axboe Cc: Martin K. Petersen Suggested-by: Matthew Wilcox Signed-off-by: Vishal Verma Signed-off-by: Dan Williams --- fs/block_dev.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/block_dev.c b/fs/block_dev.c index c7e4163ede87..054ef1bbb821 100644 --- a/fs/block_dev.c +++ b/fs/block_dev.c @@ -376,7 +376,7 @@ int bdev_read_page(struct block_device *bdev, sector_t sector, struct page *page) { const struct block_device_operations *ops = bdev->bd_disk->fops; - if (!ops->rw_page) + if (!ops->rw_page || bdev_get_integrity(bdev)) return -EOPNOTSUPP; return ops->rw_page(bdev, sector + get_start_sect(bdev), page, READ); } @@ -407,7 +407,7 @@ int bdev_write_page(struct block_device *bdev, sector_t sector, int result; int rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE; const struct block_device_operations *ops = bdev->bd_disk->fops; - if (!ops->rw_page) + if (!ops->rw_page || bdev_get_integrity(bdev)) return -EOPNOTSUPP; set_page_writeback(page); result = ops->rw_page(bdev, sector + get_start_sect(bdev), page, rw); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/