From patchwork Fri Apr 7 20:05:34 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13205319 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 4C776C77B77 for ; Fri, 7 Apr 2023 20:06:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229868AbjDGUGV (ORCPT ); Fri, 7 Apr 2023 16:06:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57738 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229437AbjDGUGU (ORCPT ); Fri, 7 Apr 2023 16:06:20 -0400 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 15DC5B454; Fri, 7 Apr 2023 13:06:19 -0700 (PDT) Received: from pps.filterd (m0246630.ppops.net [127.0.0.1]) by mx0b-00069f02.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 337FxDxn018772; Fri, 7 Apr 2023 20:05:59 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 : mime-version : content-transfer-encoding; s=corp-2022-7-12; bh=IX64E90urNX7WMpx26VUPcwGHtWTtwI0BZbxS3ixU4k=; b=H5poPzWX02WWPBvIgpNcjLKRnwV8EF+GXR1yW7Pu671Ux4kULB1yaZYlnr16avv3WwYx rPhuZx/Q/iWgf6P5ACSCtbQ11ugHp5RKhcGXkc9RKhCEo8Zc3L2Lp4lfj/o81yaAh+HC Mlt9ARvXsHdpODiiO4NSZZcIkHJ6Kjpkz9+E73WkNzQYgF1impXH8ZSpg4b9iIRNpdwP tz3dVX30LrQGLxUawdVQJYoRckT8LUSwOsYkItCThS9CjyRe8HI8M1XT0wCsbCqao9qD CpAz+IJeRWZxyLDJeF3Rg9QsIZ/Juv2fI/EOXkx9uvJbS2KAAg4xXWZaj8UHuV3xv+xR UA== Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.appoci.oracle.com [147.154.18.20]) by mx0b-00069f02.pphosted.com (PPS) with ESMTPS id 3ppb1dwryg-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 07 Apr 2023 20:05:59 +0000 Received: from pps.filterd (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (8.17.1.19/8.17.1.19) with ESMTP id 337J0UKA034219; Fri, 7 Apr 2023 20:05:58 GMT Received: from pps.reinject (localhost [127.0.0.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTPS id 3pptjxeedu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 07 Apr 2023 20:05:58 +0000 Received: from iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 337K5tqs010228; Fri, 7 Apr 2023 20:05:57 GMT Received: from mnchrist-mac.us.oracle.com (dhcp-10-154-128-1.vpn.oracle.com [10.154.128.1]) by iadpaimrmta02.imrmtpd1.prodappiadaev1.oraclevcn.com (PPS) with ESMTP id 3pptjxeeam-2; Fri, 07 Apr 2023 20:05:57 +0000 From: Mike Christie To: bvanassche@acm.org, hch@lst.de, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, james.bottomley@hansenpartnership.com, linux-block@vger.kernel.org, dm-devel@redhat.com, snitzer@kernel.org, axboe@kernel.dk, linux-nvme@lists.infradead.org, chaitanyak@nvidia.com, kbusch@kernel.org, target-devel@vger.kernel.org Cc: Mike Christie , Chaitanya Kulkarni Subject: [PATCH v6 01/18] block: Add PR callouts for read keys and reservation Date: Fri, 7 Apr 2023 15:05:34 -0500 Message-Id: <20230407200551.12660-2-michael.christie@oracle.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230407200551.12660-1-michael.christie@oracle.com> References: <20230407200551.12660-1-michael.christie@oracle.com> MIME-Version: 1.0 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=2023-04-07_12,2023-04-06_03,2023-02-09_01 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 adultscore=0 phishscore=0 bulkscore=0 mlxscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304070180 X-Proofpoint-GUID: fz2bR8uJalfGpOtkd4fkrJ4HH4S8UKmz X-Proofpoint-ORIG-GUID: fz2bR8uJalfGpOtkd4fkrJ4HH4S8UKmz Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org Add callouts for reading keys and reservations. This allows LIO to support the READ_KEYS and READ_RESERVATION commands so it can export devices to VMs for software like windows clustering. Signed-off-by: Mike Christie Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig Reviewed-by: Bart Van Assche Reviewed-by: Hannes Reinecke --- include/linux/pr.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/include/linux/pr.h b/include/linux/pr.h index 94ceec713afe..3003daec28a5 100644 --- a/include/linux/pr.h +++ b/include/linux/pr.h @@ -4,6 +4,18 @@ #include +struct pr_keys { + u32 generation; + u32 num_keys; + u64 keys[]; +}; + +struct pr_held_reservation { + u64 key; + u32 generation; + enum pr_type type; +}; + struct pr_ops { int (*pr_register)(struct block_device *bdev, u64 old_key, u64 new_key, u32 flags); @@ -14,6 +26,19 @@ struct pr_ops { int (*pr_preempt)(struct block_device *bdev, u64 old_key, u64 new_key, enum pr_type type, bool abort); int (*pr_clear)(struct block_device *bdev, u64 key); + /* + * pr_read_keys - Read the registered keys and return them in the + * pr_keys->keys array. The keys array will have been allocated at the + * end of the pr_keys struct, and pr_keys->num_keys must be set to the + * number of keys the array can hold. If there are more than can fit + * in the array, success will still be returned and pr_keys->num_keys + * will reflect the total number of keys the device contains, so the + * caller can retry with a larger array. + */ + int (*pr_read_keys)(struct block_device *bdev, + struct pr_keys *keys_info); + int (*pr_read_reservation)(struct block_device *bdev, + struct pr_held_reservation *rsv); }; #endif /* LINUX_PR_H */