From patchwork Wed May 3 18:38:07 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 13230478 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4A885C7EE26 for ; Wed, 3 May 2023 18:40:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229865AbjECSk2 (ORCPT ); Wed, 3 May 2023 14:40:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229812AbjECSkQ (ORCPT ); Wed, 3 May 2023 14:40:16 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4C92526B; Wed, 3 May 2023 11:40:11 -0700 (PDT) Received: from pps.filterd (m0246632.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 343HpCg3009519; Wed, 3 May 2023 18:39:34 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : content-transfer-encoding : content-type : mime-version; s=corp-2023-03-30; bh=XgtMElOSqEBdxUjAqAlOSvt9wkZcvJU1MNOymN72JhE=; b=VGwv5DVAs/nHpIVn3wrddsQEx/URi04m1kuU7e3UkXSfa368QFyuPlxnoxRQyCMsxS5h 623WQ+zuSvl3yTYUYN8t0nU8k9wZsAItQkB4ct6cvhCfXWvTRRWyWHrWihtXr1d/d9Ls G9IiRu7Y/JHhjY9dcnxxByQgJotdrTW8Y5xxbPp0yGZecgWjKXjwJvjK6YAgcnqBdy2L GeOE73nfybfH0iYZfFuSmYwAvZqRlmAl/D00hFReF0Jg84DLxr1HyL0wJkR4MMSAybXE dikdaVt2DwQ7l/eOei7LCfW/dtIvv857rcM8mmfcft8pT9lVmFg4AFgqkrmO/DilwFs5 oA== Received: from iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta03.appoci.oracle.com [130.35.103.27]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3qburg869n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 03 May 2023 18:39:34 +0000 Received: from pps.filterd (iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 343HXUgp027022; Wed, 3 May 2023 18:39:33 GMT Received: from nam12-dm6-obe.outbound.protection.outlook.com (mail-dm6nam12lp2170.outbound.protection.outlook.com [104.47.59.170]) by iadpaimrmta03.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3q8spdscfj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 03 May 2023 18:39:33 +0000 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=CR0ET8K4DMfkD2B7JhETag5SIWHDSaMNLgUJ/5OnMuuIAFxY3hSks2FLZ1WURrK1O94g6krNJFCeJMPFQ5z+XQXqVg52HjdWjpc7bRJY5OxQMYGqwjxL3FN66H31vDQSPZ69b6tnHbuwDREMErFdUFTWGWdRz8d3Esyu7raHbbDKP7o4ZGMUdfpo87itLcNKkeEFEHoXoHaMx32/IkJD7LL1a0XmtjqStqPzem4WZ0dWxr78pgosGf/kX/uHZC9q66cqabH+/w3Y+fCNa6YSV/UvieiwEqllDsAU6l4LVaq6MaxNL9qcH/Kn8/4M3dbXf45723vVK1OD4wxc4P/n3g== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=XgtMElOSqEBdxUjAqAlOSvt9wkZcvJU1MNOymN72JhE=; b=ZmdB4PnVJwFo1/H00FCovyS4O25bumQ1Y+q6+iuiEB7R0Dg8OYch4/ohgpezGKttWZhhmK53HVDiPw4qDYr+Dl2qZZgEXJLuf+QRpdbSCqH+rHvz+SRBOY4MqBeb/nLH1BR3KYBelnPp+arYxGRod1U2D1dq/AiwJTKorcRK0KPqMicN/dYAZgATQbTMREyiJB/M9w5Yx+7W6zXZy2sfuiNkIZbtrFltwgqz49RCRfYI6VKH2qH6oSA7IIw0BizsfPVvHigS9NT34GVVjmqZiGxPJ0RLWobwsCDN9yNNIhWiOUNMcElx0Xzwwzr0JMPHXw4MvpXWOIy/eP8DnzXQnw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=oracle.com; dmarc=pass action=none header.from=oracle.com; dkim=pass header.d=oracle.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.onmicrosoft.com; s=selector2-oracle-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=XgtMElOSqEBdxUjAqAlOSvt9wkZcvJU1MNOymN72JhE=; b=0KuYzJItN3zCN80yRcGIkzQ5C5T2BqDC14/vKNQGQ0nkg3WcF+xsGKJ1/2iFf6bflsFBFoTqZMrS0lzF4UPRCCMR/BT3ACOX26c3Ikp/vWiFMgiSgcbaJuzGeHB5uocE0p92691W5MKOrPJbAYUhIxfBRQ0BZlu1HWEoUeot11w= Received: from DM6PR10MB4313.namprd10.prod.outlook.com (2603:10b6:5:212::20) by IA1PR10MB6171.namprd10.prod.outlook.com (2603:10b6:208:3a5::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6363.22; Wed, 3 May 2023 18:39:31 +0000 Received: from DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::8456:ba59:80ec:d804]) by DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::8456:ba59:80ec:d804%7]) with mapi id 15.20.6340.031; Wed, 3 May 2023 18:39:31 +0000 From: John Garry To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, martin.petersen@oracle.com, djwong@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org, dchinner@redhat.com, jejb@linux.ibm.com Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-scsi@vger.kernel.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-security-module@vger.kernel.org, paul@paul-moore.com, jmorris@namei.org, serge@hallyn.com, Prasad Singamsetty , John Garry Subject: [PATCH RFC 02/16] fs/bdev: Add atomic write support info to statx Date: Wed, 3 May 2023 18:38:07 +0000 Message-Id: <20230503183821.1473305-3-john.g.garry@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230503183821.1473305-1-john.g.garry@oracle.com> References: <20230503183821.1473305-1-john.g.garry@oracle.com> X-ClientProxiedBy: DS7PR05CA0106.namprd05.prod.outlook.com (2603:10b6:8:56::24) To DM6PR10MB4313.namprd10.prod.outlook.com (2603:10b6:5:212::20) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR10MB4313:EE_|IA1PR10MB6171:EE_ X-MS-Office365-Filtering-Correlation-Id: 77e0a29a-5755-4916-9500-08db4c05bb90 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:DM6PR10MB4313.namprd10.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230028)(346002)(136003)(376002)(396003)(39860400002)(366004)(451199021)(2616005)(186003)(4326008)(103116003)(921005)(36756003)(38100700002)(83380400001)(66556008)(7416002)(66476007)(86362001)(41300700001)(8676002)(2906002)(107886003)(54906003)(5660300002)(6666004)(478600001)(8936002)(6486002)(6506007)(316002)(26005)(6512007)(1076003)(66946007);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: oracle.com X-MS-Exchange-CrossTenant-Network-Message-Id: 77e0a29a-5755-4916-9500-08db4c05bb90 X-MS-Exchange-CrossTenant-AuthSource: DM6PR10MB4313.namprd10.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 May 2023 18:39:30.9917 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 8SQ0UYKfpvth7JE8pX/l6Izk3Um5HwZ6cF0FP9hidA+aFYc08+iBf0OquNSDPqBWWFeZFmvVpdfbaOi6l/mPUg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR10MB6171 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-03_13,2023-05-03_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 bulkscore=0 spamscore=0 mlxlogscore=999 mlxscore=0 adultscore=0 phishscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2305030160 X-Proofpoint-GUID: ni2Fet1Pq0gaFvSxaD5rQsQlvtFNb6Gi X-Proofpoint-ORIG-GUID: ni2Fet1Pq0gaFvSxaD5rQsQlvtFNb6Gi Precedence: bulk List-ID: From: Prasad Singamsetty Extend statx system call to return additional info for atomic write support support if the specified file is a block device. Add initial support for a block device. Signed-off-by: Prasad Singamsetty Signed-off-by: John Garry --- block/bdev.c | 21 +++++++++++++++++++++ fs/stat.c | 10 ++++++++++ include/linux/blkdev.h | 4 ++++ include/linux/stat.h | 2 ++ include/uapi/linux/stat.h | 7 ++++++- 5 files changed, 43 insertions(+), 1 deletion(-) diff --git a/block/bdev.c b/block/bdev.c index 1795c7d4b99e..6a5fd5abaadc 100644 --- a/block/bdev.c +++ b/block/bdev.c @@ -1014,3 +1014,24 @@ void bdev_statx_dioalign(struct inode *inode, struct kstat *stat) blkdev_put_no_open(bdev); } + +/* + * Handle statx for block devices to get properties of WRITE ATOMIC + * feature support. + */ +void bdev_statx_atomic(struct inode *inode, struct kstat *stat) +{ + struct block_device *bdev; + + bdev = blkdev_get_no_open(inode->i_rdev); + if (!bdev) + return; + + stat->atomic_write_unit_min = queue_atomic_write_unit_min(bdev->bd_queue); + stat->atomic_write_unit_max = queue_atomic_write_unit_max(bdev->bd_queue); + stat->attributes |= STATX_ATTR_WRITE_ATOMIC; + stat->attributes_mask |= STATX_ATTR_WRITE_ATOMIC; + stat->result_mask |= STATX_WRITE_ATOMIC; + + blkdev_put_no_open(bdev); +} diff --git a/fs/stat.c b/fs/stat.c index 7c238da22ef0..d20334a0e9ae 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -256,6 +256,14 @@ static int vfs_statx(int dfd, struct filename *filename, int flags, bdev_statx_dioalign(inode, stat); } + /* Handle STATX_WRITE_ATOMIC for block devices */ + if (request_mask & STATX_WRITE_ATOMIC) { + struct inode *inode = d_backing_inode(path.dentry); + + if (S_ISBLK(inode->i_mode)) + bdev_statx_atomic(inode, stat); + } + path_put(&path); if (retry_estale(error, lookup_flags)) { lookup_flags |= LOOKUP_REVAL; @@ -636,6 +644,8 @@ cp_statx(const struct kstat *stat, struct statx __user *buffer) tmp.stx_mnt_id = stat->mnt_id; tmp.stx_dio_mem_align = stat->dio_mem_align; tmp.stx_dio_offset_align = stat->dio_offset_align; + tmp.stx_atomic_write_unit_min = stat->atomic_write_unit_min; + tmp.stx_atomic_write_unit_max = stat->atomic_write_unit_max; return copy_to_user(buffer, &tmp, sizeof(tmp)) ? -EFAULT : 0; } diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 6b6f2992338c..19d33b2897b2 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1527,6 +1527,7 @@ int sync_blockdev_range(struct block_device *bdev, loff_t lstart, loff_t lend); int sync_blockdev_nowait(struct block_device *bdev); void sync_bdevs(bool wait); void bdev_statx_dioalign(struct inode *inode, struct kstat *stat); +void bdev_statx_atomic(struct inode *inode, struct kstat *stat); void printk_all_partitions(void); #else static inline void invalidate_bdev(struct block_device *bdev) @@ -1546,6 +1547,9 @@ static inline void sync_bdevs(bool wait) static inline void bdev_statx_dioalign(struct inode *inode, struct kstat *stat) { } +static inline void bdev_statx_atomic(struct inode *inode, struct kstat *stat) +{ +} static inline void printk_all_partitions(void) { } diff --git a/include/linux/stat.h b/include/linux/stat.h index 52150570d37a..dfa69ecfaacf 100644 --- a/include/linux/stat.h +++ b/include/linux/stat.h @@ -53,6 +53,8 @@ struct kstat { u32 dio_mem_align; u32 dio_offset_align; u64 change_cookie; + u32 atomic_write_unit_max; + u32 atomic_write_unit_min; }; /* These definitions are internal to the kernel for now. Mainly used by nfsd. */ diff --git a/include/uapi/linux/stat.h b/include/uapi/linux/stat.h index 7cab2c65d3d7..c99d7cac2aa6 100644 --- a/include/uapi/linux/stat.h +++ b/include/uapi/linux/stat.h @@ -127,7 +127,10 @@ struct statx { __u32 stx_dio_mem_align; /* Memory buffer alignment for direct I/O */ __u32 stx_dio_offset_align; /* File offset alignment for direct I/O */ /* 0xa0 */ - __u64 __spare3[12]; /* Spare space for future expansion */ + __u32 stx_atomic_write_unit_max; + __u32 stx_atomic_write_unit_min; + /* 0xb0 */ + __u64 __spare3[11]; /* Spare space for future expansion */ /* 0x100 */ }; @@ -154,6 +157,7 @@ struct statx { #define STATX_BTIME 0x00000800U /* Want/got stx_btime */ #define STATX_MNT_ID 0x00001000U /* Got stx_mnt_id */ #define STATX_DIOALIGN 0x00002000U /* Want/got direct I/O alignment info */ +#define STATX_WRITE_ATOMIC 0x00004000U /* Want/got atomic_write_* fields */ #define STATX__RESERVED 0x80000000U /* Reserved for future struct statx expansion */ @@ -189,6 +193,7 @@ struct statx { #define STATX_ATTR_MOUNT_ROOT 0x00002000 /* Root of a mount */ #define STATX_ATTR_VERITY 0x00100000 /* [I] Verity protected file */ #define STATX_ATTR_DAX 0x00200000 /* File is currently in DAX state */ +#define STATX_ATTR_WRITE_ATOMIC 0x00400000 /* File supports atomic write operations */ #endif /* _UAPI_LINUX_STAT_H */