From patchwork Fri Feb 2 21:00:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Desnoyers X-Patchwork-Id: 13543443 Received: from smtpout.efficios.com (smtpout.efficios.com [167.114.26.122]) (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 CFA4612F365; Fri, 2 Feb 2024 21:00:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=167.114.26.122 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706907634; cv=none; b=kCfy6DhrDE6sL7103ZV5C208hdewu5bM5kKs6efrxAxY0EiWpMMiF4GNfAOA1LtNNb8dl+Ookgx5fH/0BpQZxbwnWry7yWWQiIE8YvddIm6BVww/oOa+Lz1b2hOtSh5aSh9rVIgKumPO2KE5z7h0587Vap8PJpNnJaZR8QprgQ8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1706907634; c=relaxed/simple; bh=6kaHeiBxh7tXa+wyC1kCcD7MhkDErN5w3UH4NjBdGts=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=QVhBZC4ZgoipqJykJPDCfOoZphtyCY68nkQfPJV8zUWALC00H59vmB07+EqkoJvKAPD7m8dr4ajV0Ww00uWTA4av0RfaTzfDHOaDKsujLAxf/vD4K2jGFP90pH7amPVlakRIaX+z7cGgt/KeY0rXbfuzwcN0aLQbqK8vhunAflM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=efficios.com; spf=pass smtp.mailfrom=efficios.com; dkim=pass (2048-bit key) header.d=efficios.com header.i=@efficios.com header.b=fQOdZGB8; arc=none smtp.client-ip=167.114.26.122 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=efficios.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=efficios.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=efficios.com header.i=@efficios.com header.b="fQOdZGB8" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=efficios.com; s=smtpout1; t=1706907629; bh=6kaHeiBxh7tXa+wyC1kCcD7MhkDErN5w3UH4NjBdGts=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fQOdZGB8ZoM+ot4BpfHpDhS3UZ/Xl9kL6L2cCK/HSOO89KLHleVlUen3Hvy7uouoA jkSg4Ou1+kepWAwhWgSZKXNNm6LCEyBCdPkykABCJgThUTXtmOtFcZ6bxqN2ifCI+o 96d3GrsSllptt4Mc0jotzKMhB/znC1tQydRK48oH5ngXTQVmKOtZrOhOG0WfGwKx6w kfMewMuk+6MGuzHxK4hWcgzNa+KJTaQFp4kakLGUOhyCRsSciU6S8CX33ScaDEGVFa qlecryD5H6JRb2MG0sirVt1fMHpExeBDP5sB+exAwyLtxDtvgAdLPLFw2aSkquU6rq T/tHs8uC3lE8Q== Received: from thinkos.internal.efficios.com (192-222-143-198.qc.cable.ebox.net [192.222.143.198]) by smtpout.efficios.com (Postfix) with ESMTPSA id 4TRSph5pS4zX4T; Fri, 2 Feb 2024 16:00:28 -0500 (EST) From: Mathieu Desnoyers To: Dan Williams , Arnd Bergmann , Dave Chinner Cc: linux-kernel@vger.kernel.org, Mathieu Desnoyers , Andrew Morton , Linus Torvalds , Vishal Verma , Dave Jiang , Matthew Wilcox , Russell King , linux-arch@vger.kernel.org, linux-cxl@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-xfs@vger.kernel.org, dm-devel@lists.linux.dev, nvdimm@lists.linux.dev, linux-s390@vger.kernel.org, Alasdair Kergon , Mike Snitzer , Mikulas Patocka Subject: [RFC PATCH v4 05/12] virtio: Treat alloc_dax() -EOPNOTSUPP failure as non-fatal Date: Fri, 2 Feb 2024 16:00:12 -0500 Message-Id: <20240202210019.88022-6-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240202210019.88022-1-mathieu.desnoyers@efficios.com> References: <20240202210019.88022-1-mathieu.desnoyers@efficios.com> Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 In preparation for checking whether the architecture has data cache aliasing within alloc_dax(), modify the error handling of virtio virtio_fs_setup_dax() to treat alloc_dax() -EOPNOTSUPP failure as non-fatal. For the transition, consider that alloc_dax() returning NULL is the same as returning -EOPNOTSUPP. Co-developed-by: Dan Williams Signed-off-by: Dan Williams Fixes: d92576f1167c ("dax: does not work correctly with virtual aliasing caches") Signed-off-by: Mathieu Desnoyers Cc: Alasdair Kergon Cc: Mike Snitzer Cc: Mikulas Patocka Cc: Andrew Morton Cc: Linus Torvalds Cc: Dan Williams Cc: Vishal Verma Cc: Dave Jiang Cc: Matthew Wilcox Cc: Arnd Bergmann Cc: Russell King Cc: linux-arch@vger.kernel.org Cc: linux-cxl@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org Cc: linux-mm@kvack.org Cc: linux-xfs@vger.kernel.org Cc: dm-devel@lists.linux.dev Cc: nvdimm@lists.linux.dev --- fs/fuse/virtio_fs.c | 15 +++++++++++---- 1 file changed, 11 insertions(+), 4 deletions(-) diff --git a/fs/fuse/virtio_fs.c b/fs/fuse/virtio_fs.c index 5f1be1da92ce..621b1bca2d55 100644 --- a/fs/fuse/virtio_fs.c +++ b/fs/fuse/virtio_fs.c @@ -16,6 +16,7 @@ #include #include #include +#include #include #include "fuse_i.h" @@ -795,8 +796,11 @@ static void virtio_fs_cleanup_dax(void *data) put_dax(dax_dev); } +DEFINE_FREE(cleanup_dax, struct dax_dev *, if (!IS_ERR_OR_NULL(_T)) virtio_fs_cleanup_dax(_T)) + static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs) { + struct dax_device *dax_dev __free(cleanup_dax) = NULL; struct virtio_shm_region cache_reg; struct dev_pagemap *pgmap; bool have_cache; @@ -804,6 +808,12 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs) if (!IS_ENABLED(CONFIG_FUSE_DAX)) return 0; + dax_dev = alloc_dax(fs, &virtio_fs_dax_ops); + if (IS_ERR_OR_NULL(dax_dev)) { + int rc = IS_ERR(dax_dev) ? PTR_ERR(dax_dev) : -EOPNOTSUPP; + return rc == -EOPNOTSUPP ? 0 : rc; + } + /* Get cache region */ have_cache = virtio_get_shm_region(vdev, &cache_reg, (u8)VIRTIO_FS_SHMCAP_ID_CACHE); @@ -849,10 +859,7 @@ static int virtio_fs_setup_dax(struct virtio_device *vdev, struct virtio_fs *fs) dev_dbg(&vdev->dev, "%s: window kaddr 0x%px phys_addr 0x%llx len 0x%llx\n", __func__, fs->window_kaddr, cache_reg.addr, cache_reg.len); - fs->dax_dev = alloc_dax(fs, &virtio_fs_dax_ops); - if (IS_ERR(fs->dax_dev)) - return PTR_ERR(fs->dax_dev); - + fs->dax_dev = no_free_ptr(dax_dev); return devm_add_action_or_reset(&vdev->dev, virtio_fs_cleanup_dax, fs->dax_dev); }