From patchwork Thu Feb 8 18:49:06 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mathieu Desnoyers X-Patchwork-Id: 13550349 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 AA75033CCF; Thu, 8 Feb 2024 18:49:32 +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=1707418175; cv=none; b=Nk6/qLGda41G95UO5TejNDQU3QknTFeMrNnOlSP+ZTJtSTRHeQTJ0gCNCNq3zsxEikyokDoCLbZXOYqDRmfRVqo+S/y8YeNeUvWjY5RZpElZqIjaO+ZAqG7hI+oHLKEtdO8Xx7GMibYZ7zgd7ps4UZ84rVJlJKhkKnolyO4FHaU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707418175; c=relaxed/simple; bh=6kaHeiBxh7tXa+wyC1kCcD7MhkDErN5w3UH4NjBdGts=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=WjZbrWLb7HJmWcwupD4Z7GMwLLDghMVmTONV9dE5Fg+3bpwv3WF54iaGh/zzSYljivdvA/A+xpONNk9q84hjUBqydrL1rIxCjHs7LrG/fa6pLqu6sZN2ewdp8OiYCWUSbIJMa7vBtanj170IL5HAN6Vm9Ho3CRq3Ywcng/ObdbM= 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=G1otBWj1; 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="G1otBWj1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=efficios.com; s=smtpout1; t=1707418164; bh=6kaHeiBxh7tXa+wyC1kCcD7MhkDErN5w3UH4NjBdGts=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=G1otBWj15OtcJQ7enAUe6jy4+Hmw1j+1RwF/HjVZzbrmTo0Xq8YXGs0hrk2qusl1d eijVgRfCPmEmMkGdLStUirsrDOsQmxW/Vfu7q9zBCAFzVJhw85FoIlYd4T1LBmOIGy AJ7zW/g2Rt4d1ND4RQ50x/gK+b6zeCeinDap1WQDbFiItLb5CYncWggvKtcuuQp4fM LLzxPROqJhaQezmxcMN5SI6J2fdnGw88vf+f/UxShR7g5ODOvE8FjXmQHReKIcaIMH 8L15rahH+uIOjMvUoX/ApTNmMuln8Ju+P7uQzH2v/mh1UushfEwCFZqtPgbFAqH9ST vz4YFgZmmOK/A== 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 4TW5ch438gzY5N; Thu, 8 Feb 2024 13:49:24 -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: [PATCH v4 05/12] virtio: Treat alloc_dax() -EOPNOTSUPP failure as non-fatal Date: Thu, 8 Feb 2024 13:49:06 -0500 Message-Id: <20240208184913.484340-6-mathieu.desnoyers@efficios.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240208184913.484340-1-mathieu.desnoyers@efficios.com> References: <20240208184913.484340-1-mathieu.desnoyers@efficios.com> Precedence: bulk X-Mailing-List: nvdimm@lists.linux.dev 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); }