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Fri, 24 Feb 2023 17:45:06 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64%7]) with mapi id 15.20.6156.007; Fri, 24 Feb 2023 17:45:06 +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 Subject: [PATCH v4 01/18] block: Add PR callouts for read keys and reservation Date: Fri, 24 Feb 2023 11:44:45 -0600 Message-Id: <20230224174502.321490-2-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DM5PR07CA0076.namprd07.prod.outlook.com (2603:10b6:4:ad::41) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 2294f043-102e-47ac-191d-08db168eddb6 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This allows LIO to support the READ_KEYS and READ_RESERVATION commands and will allow dm-multipath to optimize it's error handling so it can check if it's getting an error because there's an existing reservation or if we need to retry different paths. Note: This only initially adds the struct definitions in the kernel as I'm not sure if we wanted to export the interface to userspace yet. read_keys and read_reservation are exactly what dm-multipath and LIO need, but for a userspace interface we may want something like SCSI's READ_FULL_STATUS and NVMe's report reservation commands. Those are overkill for dm/LIO and READ_FULL_STATUS is sometimes broken for SCSI devices. Signed-off-by: Mike Christie Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig --- 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 */ From patchwork Fri Feb 24 17:44:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151620 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 4D1EDC7EE37 for ; Fri, 24 Feb 2023 17:45:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229771AbjBXRpg (ORCPT ); Fri, 24 Feb 2023 12:45:36 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40814 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229745AbjBXRpc (ORCPT ); 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bh=hO06dapoZ9ZkQfiFC5kiCHCW4OVSoWiTU5QV+MPVyTE=; b=gRdOSgCyHkUemd5eISNGU16yrw+LDSTOo2ynfqRymAqivah8wZCjJDCOZxT4+2jVO/JNKO5iqqrEw2vJs4Mee2Um9hUMO4BEU3JDpqN9tm9uQ0RYqKZDQp0WAEI1iTCjtI97n/3YnuGFqV279NZJwM8z1QEjLu9rix9nQPqfv4M= Received: from DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) by CH0PR10MB7535.namprd10.prod.outlook.com (2603:10b6:610:187::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6156.7; Fri, 24 Feb 2023 17:45:07 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64%7]) with mapi id 15.20.6156.007; Fri, 24 Feb 2023 17:45:07 +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 , Stefan Haberland , Jan Hoeppner Subject: [PATCH v4 02/18] block: Rename BLK_STS_NEXUS to BLK_STS_RESV_CONFLICT Date: Fri, 24 Feb 2023 11:44:46 -0600 Message-Id: <20230224174502.321490-3-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DM5PR07CA0073.namprd07.prod.outlook.com (2603:10b6:4:ad::38) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 68f8e0a2-2b32-4883-aa55-08db168ede6d X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This renames BLK_STS_NEXUS so it better reflects this. Signed-off-by: Mike Christie Cc: Stefan Haberland Cc: Jan Hoeppner Acked-by: Stefan Haberland --- block/blk-core.c | 2 +- drivers/nvme/host/core.c | 2 +- drivers/s390/block/dasd.c | 2 +- drivers/scsi/scsi_lib.c | 2 +- include/linux/blk_types.h | 4 ++-- 5 files changed, 6 insertions(+), 6 deletions(-) diff --git a/block/blk-core.c b/block/blk-core.c index 82b5b2c53f1e..4439e68064a2 100644 --- a/block/blk-core.c +++ b/block/blk-core.c @@ -155,7 +155,7 @@ static const struct { [BLK_STS_NOSPC] = { -ENOSPC, "critical space allocation" }, [BLK_STS_TRANSPORT] = { -ENOLINK, "recoverable transport" }, [BLK_STS_TARGET] = { -EREMOTEIO, "critical target" }, - [BLK_STS_NEXUS] = { -EBADE, "critical nexus" }, + [BLK_STS_RESV_CONFLICT] = { -EBADE, "reservation conflict" }, [BLK_STS_MEDIUM] = { -ENODATA, "critical medium" }, [BLK_STS_PROTECTION] = { -EILSEQ, "protection" }, [BLK_STS_RESOURCE] = { -ENOMEM, "kernel resource" }, diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 8698410aeb84..ba6f1911f7ea 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -278,7 +278,7 @@ static blk_status_t nvme_error_status(u16 status) case NVME_SC_INVALID_PI: return BLK_STS_PROTECTION; case NVME_SC_RESERVATION_CONFLICT: - return BLK_STS_NEXUS; + return BLK_STS_RESV_CONFLICT; case NVME_SC_HOST_PATH_ERROR: return BLK_STS_TRANSPORT; case NVME_SC_ZONE_TOO_MANY_ACTIVE: diff --git a/drivers/s390/block/dasd.c b/drivers/s390/block/dasd.c index a9c2a8d76c45..a2899d9690d4 100644 --- a/drivers/s390/block/dasd.c +++ b/drivers/s390/block/dasd.c @@ -2723,7 +2723,7 @@ static void __dasd_cleanup_cqr(struct dasd_ccw_req *cqr) else if (status == 0) { switch (cqr->intrc) { case -EPERM: - error = BLK_STS_NEXUS; + error = BLK_STS_RESV_CONFLICT; break; case -ENOLINK: error = BLK_STS_TRANSPORT; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index abe93ec8b7d0..7cc7fb2d3359 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -598,7 +598,7 @@ static blk_status_t scsi_result_to_blk_status(int result) case SCSIML_STAT_OK: break; case SCSIML_STAT_RESV_CONFLICT: - return BLK_STS_NEXUS; + return BLK_STS_RESV_CONFLICT; case SCSIML_STAT_NOSPC: return BLK_STS_NOSPC; case SCSIML_STAT_MED_ERROR: diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h index 99be590f952f..2b2452086a2f 100644 --- a/include/linux/blk_types.h +++ b/include/linux/blk_types.h @@ -96,7 +96,7 @@ typedef u16 blk_short_t; #define BLK_STS_NOSPC ((__force blk_status_t)3) #define BLK_STS_TRANSPORT ((__force blk_status_t)4) #define BLK_STS_TARGET ((__force blk_status_t)5) -#define BLK_STS_NEXUS ((__force blk_status_t)6) +#define BLK_STS_RESV_CONFLICT ((__force blk_status_t)6) #define BLK_STS_MEDIUM ((__force blk_status_t)7) #define BLK_STS_PROTECTION ((__force blk_status_t)8) #define BLK_STS_RESOURCE ((__force blk_status_t)9) @@ -184,7 +184,7 @@ static inline bool blk_path_error(blk_status_t error) case BLK_STS_NOTSUPP: case BLK_STS_NOSPC: case BLK_STS_TARGET: - case BLK_STS_NEXUS: + case BLK_STS_RESV_CONFLICT: case BLK_STS_MEDIUM: case BLK_STS_PROTECTION: return false; From patchwork Fri Feb 24 17:44:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151619 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 85671C6FA8E for ; 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Fri, 24 Feb 2023 17:45:09 +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 v4 03/18] scsi: Rename sd_pr_command Date: Fri, 24 Feb 2023 11:44:47 -0600 Message-Id: <20230224174502.321490-4-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DM5PR07CA0079.namprd07.prod.outlook.com (2603:10b6:4:ad::44) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: f4105db5-56cc-4112-0e61-08db168edf7b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Mike Christie Reviewed-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni --- drivers/scsi/sd.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a38c71511bc9..79377173f6a3 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1743,7 +1743,7 @@ static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result) } } -static int sd_pr_command(struct block_device *bdev, u8 sa, +static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, u64 sa_key, u8 type, u8 flags) { struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); @@ -1786,7 +1786,7 @@ static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, { if (flags & ~PR_FL_IGNORE_KEY) return -EOPNOTSUPP; - return sd_pr_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, + return sd_pr_out_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, old_key, new_key, 0, (1 << 0) /* APTPL */); } @@ -1796,24 +1796,24 @@ static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, { if (flags) return -EOPNOTSUPP; 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Fri, 24 Feb 2023 17:45:11 +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 Subject: [PATCH v4 04/18] scsi: Move sd_pr_type to header to share Date: Fri, 24 Feb 2023 11:44:48 -0600 Message-Id: <20230224174502.321490-5-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DM5PR07CA0074.namprd07.prod.outlook.com (2603:10b6:4:ad::39) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 97f5b941-f128-4982-7267-08db168ee088 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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The next patch will then also add a helper to go from the SCSI value to the block one for use with PERSISTENT_RESERVE_IN commands. Signed-off-by: Mike Christie Reviewed-by: Christoph Hellwig Reviewed-by: Chaitanya Kulkarni --- drivers/scsi/sd.c | 33 ++++++++------------------------- include/scsi/scsi_block_pr.h | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 44 insertions(+), 25 deletions(-) create mode 100644 include/scsi/scsi_block_pr.h diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 79377173f6a3..a801ef393c38 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -67,6 +67,7 @@ #include #include #include +#include #include "sd.h" #include "scsi_priv.h" @@ -1693,26 +1694,6 @@ static int sd_get_unique_id(struct gendisk *disk, u8 id[16], return ret; } -static char sd_pr_type(enum pr_type type) -{ - switch (type) { - case PR_WRITE_EXCLUSIVE: - return 0x01; - case PR_EXCLUSIVE_ACCESS: - return 0x03; - case PR_WRITE_EXCLUSIVE_REG_ONLY: - return 0x05; - case PR_EXCLUSIVE_ACCESS_REG_ONLY: - return 0x06; - case PR_WRITE_EXCLUSIVE_ALL_REGS: - return 0x07; - case PR_EXCLUSIVE_ACCESS_ALL_REGS: - return 0x08; - default: - return 0; - } -}; - static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result) { switch (host_byte(result)) { @@ -1743,8 +1724,8 @@ static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result) } } -static int sd_pr_out_command(struct block_device *bdev, u8 sa, - u64 key, u64 sa_key, u8 type, u8 flags) +static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, + u64 sa_key, enum scsi_pr_type type, u8 flags) { struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); struct scsi_device *sdev = sdkp->device; @@ -1796,19 +1777,21 @@ static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, { if (flags) return -EOPNOTSUPP; - return sd_pr_out_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); + return sd_pr_out_command(bdev, 0x01, key, 0, + block_pr_type_to_scsi(type), 0); } static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) { - return sd_pr_out_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); + return sd_pr_out_command(bdev, 0x02, key, 0, + block_pr_type_to_scsi(type), 0); } static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, enum pr_type type, bool abort) { return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, - sd_pr_type(type), 0); + block_pr_type_to_scsi(type), 0); } static int sd_pr_clear(struct block_device *bdev, u64 key) diff --git a/include/scsi/scsi_block_pr.h b/include/scsi/scsi_block_pr.h new file mode 100644 index 000000000000..44766d7a81d8 --- /dev/null +++ b/include/scsi/scsi_block_pr.h @@ -0,0 +1,36 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _SCSI_BLOCK_PR_H +#define _SCSI_BLOCK_PR_H + +#include + +enum scsi_pr_type { + SCSI_PR_WRITE_EXCLUSIVE = 0x01, + SCSI_PR_EXCLUSIVE_ACCESS = 0x03, + SCSI_PR_WRITE_EXCLUSIVE_REG_ONLY = 0x05, + SCSI_PR_EXCLUSIVE_ACCESS_REG_ONLY = 0x06, + SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS = 0x07, + SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS = 0x08, +}; + +static inline enum scsi_pr_type block_pr_type_to_scsi(enum pr_type type) +{ + switch (type) { + case PR_WRITE_EXCLUSIVE: + return SCSI_PR_WRITE_EXCLUSIVE; + case PR_EXCLUSIVE_ACCESS: + return SCSI_PR_EXCLUSIVE_ACCESS; + case PR_WRITE_EXCLUSIVE_REG_ONLY: + return SCSI_PR_WRITE_EXCLUSIVE_REG_ONLY; + case PR_EXCLUSIVE_ACCESS_REG_ONLY: + return SCSI_PR_EXCLUSIVE_ACCESS_REG_ONLY; + case PR_WRITE_EXCLUSIVE_ALL_REGS: + return SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS; + case PR_EXCLUSIVE_ACCESS_ALL_REGS: + return SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS; + } + + return 0; +} + +#endif From patchwork Fri Feb 24 17:44:49 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151625 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 A43E1C7EE31 for ; Fri, 24 Feb 2023 17:47:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229695AbjBXRrf (ORCPT ); Fri, 24 Feb 2023 12:47:35 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43196 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229470AbjBXRrd (ORCPT ); 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Signed-off-by: Mike Christie Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig --- drivers/scsi/sd.c | 91 ++++++++++++++++++++++++++++++++++++ include/scsi/scsi_block_pr.h | 20 ++++++++ include/scsi/scsi_proto.h | 5 ++ 3 files changed, 116 insertions(+) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index a801ef393c38..dc5a058cc686 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1724,6 +1724,95 @@ static int sd_scsi_to_pr_err(struct scsi_sense_hdr *sshdr, int result) } } +static int sd_pr_in_command(struct block_device *bdev, u8 sa, + unsigned char *data, int data_len) +{ + struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); + struct scsi_device *sdev = sdkp->device; + struct scsi_sense_hdr sshdr; + u8 cmd[10] = { PERSISTENT_RESERVE_IN, sa }; + const struct scsi_exec_args exec_args = { + .sshdr = &sshdr, + }; + int result; + + put_unaligned_be16(data_len, &cmd[7]); + + result = scsi_execute_cmd(sdev, cmd, REQ_OP_DRV_IN, data, data_len, + SD_TIMEOUT, sdkp->max_retries, &exec_args); + if (scsi_status_is_check_condition(result) && + scsi_sense_valid(&sshdr)) { + sdev_printk(KERN_INFO, sdev, "PR command failed: %d\n", result); + scsi_print_sense_hdr(sdev, NULL, &sshdr); + } + + if (result <= 0) + return result; + + return sd_scsi_to_pr_err(&sshdr, result); +} + +static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info) +{ + int result, i, data_offset, num_copy_keys; + u32 num_keys = keys_info->num_keys; + int data_len = num_keys * 8 + 8; + u8 *data; + + data = kzalloc(data_len, GFP_KERNEL); + if (!data) + return -ENOMEM; + + result = sd_pr_in_command(bdev, READ_KEYS, data, data_len); + if (result) + goto free_data; + + keys_info->generation = get_unaligned_be32(&data[0]); + keys_info->num_keys = get_unaligned_be32(&data[4]) / 8; + + data_offset = 8; + num_copy_keys = min(num_keys, keys_info->num_keys); + + for (i = 0; i < num_copy_keys; i++) { + keys_info->keys[i] = get_unaligned_be64(&data[data_offset]); + data_offset += 8; + } + +free_data: + kfree(data); + return result; +} + +static int sd_pr_read_reservation(struct block_device *bdev, + struct pr_held_reservation *rsv) +{ + struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); + struct scsi_device *sdev = sdkp->device; + u8 data[24] = { }; + int result, len; + + result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data)); + if (result) + return result; + + len = get_unaligned_be32(&data[4]); + if (!len) + return 0; + + /* Make sure we have at least the key and type */ + if (len < 14) { + sdev_printk(KERN_INFO, sdev, + "READ RESERVATION failed due to short return buffer of %d bytes\n", + len); + return -EINVAL; + } + + rsv->generation = get_unaligned_be32(&data[0]); + rsv->key = get_unaligned_be64(&data[8]); + rsv->type = scsi_pr_type_to_block(data[21] & 0x0f); + return 0; +} + static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, u64 sa_key, enum scsi_pr_type type, u8 flags) { @@ -1805,6 +1894,8 @@ static const struct pr_ops sd_pr_ops = { .pr_release = sd_pr_release, .pr_preempt = sd_pr_preempt, .pr_clear = sd_pr_clear, + .pr_read_keys = sd_pr_read_keys, + .pr_read_reservation = sd_pr_read_reservation, }; static void scsi_disk_free_disk(struct gendisk *disk) diff --git a/include/scsi/scsi_block_pr.h b/include/scsi/scsi_block_pr.h index 44766d7a81d8..9695cda4e9ce 100644 --- a/include/scsi/scsi_block_pr.h +++ b/include/scsi/scsi_block_pr.h @@ -33,4 +33,24 @@ static inline enum scsi_pr_type block_pr_type_to_scsi(enum pr_type type) return 0; } +static inline enum pr_type scsi_pr_type_to_block(enum scsi_pr_type type) +{ + switch (type) { + case SCSI_PR_WRITE_EXCLUSIVE: + return PR_WRITE_EXCLUSIVE; + case SCSI_PR_EXCLUSIVE_ACCESS: + return PR_EXCLUSIVE_ACCESS; + case SCSI_PR_WRITE_EXCLUSIVE_REG_ONLY: + return PR_WRITE_EXCLUSIVE_REG_ONLY; + case SCSI_PR_EXCLUSIVE_ACCESS_REG_ONLY: + return PR_EXCLUSIVE_ACCESS_REG_ONLY; + case SCSI_PR_WRITE_EXCLUSIVE_ALL_REGS: + return PR_WRITE_EXCLUSIVE_ALL_REGS; + case SCSI_PR_EXCLUSIVE_ACCESS_ALL_REGS: + return PR_EXCLUSIVE_ACCESS_ALL_REGS; + } + + return 0; +} + #endif diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h index fbe5bdfe4d6e..07d65c1f59db 100644 --- a/include/scsi/scsi_proto.h +++ b/include/scsi/scsi_proto.h @@ -151,6 +151,11 @@ #define ZO_FINISH_ZONE 0x02 #define ZO_OPEN_ZONE 0x03 #define ZO_RESET_WRITE_POINTER 0x04 +/* values for PR in service action */ +#define READ_KEYS 0x00 +#define READ_RESERVATION 0x01 +#define REPORT_CAPABILITES 0x02 +#define READ_FULL_STATUS 0x03 /* values for variable length command */ #define XDREAD_32 0x03 #define XDWRITE_32 0x04 From patchwork Fri Feb 24 17:44:50 2023 Content-Type: text/plain; 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Fri, 24 Feb 2023 17:45:14 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64%7]) with mapi id 15.20.6156.007; Fri, 24 Feb 2023 17:45:14 +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 Subject: [PATCH v4 06/18] dm: Add support for block PR read keys/reservation Date: Fri, 24 Feb 2023 11:44:50 -0600 Message-Id: <20230224174502.321490-7-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DM5PR07CA0053.namprd07.prod.outlook.com (2603:10b6:4:ad::18) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 59138c39-2cb2-40d0-3eae-08db168ee265 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Mike Christie --- drivers/md/dm.c | 43 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 43 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index eace45a18d45..4abf640f1e7e 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -3346,12 +3346,55 @@ static int dm_pr_clear(struct block_device *bdev, u64 key) return r; } +static int dm_pr_read_keys(struct block_device *bdev, struct pr_keys *keys) +{ + struct mapped_device *md = bdev->bd_disk->private_data; + const struct pr_ops *ops; + int r, srcu_idx; + + r = dm_prepare_ioctl(md, &srcu_idx, &bdev); + if (r < 0) + goto out; + + ops = bdev->bd_disk->fops->pr_ops; + if (ops && ops->pr_read_keys) + r = ops->pr_read_keys(bdev, keys); + else + r = -EOPNOTSUPP; +out: + dm_unprepare_ioctl(md, srcu_idx); + return r; +} + +static int dm_pr_read_reservation(struct block_device *bdev, + struct pr_held_reservation *rsv) +{ + struct mapped_device *md = bdev->bd_disk->private_data; + const struct pr_ops *ops; + int r, srcu_idx; + + r = dm_prepare_ioctl(md, &srcu_idx, &bdev); + if (r < 0) + goto out; + + ops = bdev->bd_disk->fops->pr_ops; + if (ops && ops->pr_read_reservation) + r = ops->pr_read_reservation(bdev, rsv); + else + r = -EOPNOTSUPP; +out: + dm_unprepare_ioctl(md, srcu_idx); + return r; +} + static const struct pr_ops dm_pr_ops = { .pr_register = dm_pr_register, .pr_reserve = dm_pr_reserve, .pr_release = dm_pr_release, .pr_preempt = dm_pr_preempt, .pr_clear = dm_pr_clear, + .pr_read_keys = dm_pr_read_keys, + .pr_read_reservation = dm_pr_read_reservation, }; static const struct block_device_operations dm_blk_dops = { From patchwork Fri Feb 24 17:44:51 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151626 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 AFCD4C6FA8E for ; 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Fri, 24 Feb 2023 17:45:16 +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 Subject: [PATCH v4 07/18] nvme: Fix reservation status related structs Date: Fri, 24 Feb 2023 11:44:51 -0600 Message-Id: <20230224174502.321490-8-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR06CA0045.namprd06.prod.outlook.com (2603:10b6:8:54::26) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 81a8a8f2-be5d-4929-0502-08db168ee375 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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These are not currently used, but will be in this patchset which adds support for the reservation report command. Signed-off-by: Mike Christie Reviewed-by: Keith Busch Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig --- include/linux/nvme.h | 33 +++++++++++++++++++++++++-------- 1 file changed, 25 insertions(+), 8 deletions(-) diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 4fad4aa245fb..c8c504926462 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -759,20 +759,37 @@ enum { NVME_LBART_ATTRIB_HIDE = 1 << 1, }; +struct nvme_registered_ctrl { + __le16 cntlid; + __u8 rcsts; + __u8 rsvd3[5]; + __le64 hostid; + __le64 rkey; +}; + +struct nvme_registered_ctrl_ext { + __le16 cntlid; + __u8 rcsts; + __u8 rsvd3[5]; + __le64 rkey; + __u8 hostid[16]; + __u8 rsvd32[32]; +}; + struct nvme_reservation_status { __le32 gen; __u8 rtype; __u8 regctl[2]; __u8 resv5[2]; __u8 ptpls; - __u8 resv10[13]; - struct { - __le16 cntlid; - __u8 rcsts; - __u8 resv3[5]; - __le64 hostid; - __le64 rkey; - } regctl_ds[]; + __u8 resv10[14]; + union { + struct { + __u8 rsvd24[40]; + struct nvme_registered_ctrl_ext regctl_eds[0]; + }; + struct nvme_registered_ctrl regctl_ds[0]; + }; }; enum nvme_async_event_type { From patchwork Fri Feb 24 17:44:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151629 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 6CD53C7EE2D for ; Fri, 24 Feb 2023 17:48:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229813AbjBXRsE (ORCPT ); Fri, 24 Feb 2023 12:48:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44016 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229538AbjBXRrz (ORCPT ); Fri, 24 Feb 2023 12:47:55 -0500 Received: from mx0b-00069f02.pphosted.com (mx0b-00069f02.pphosted.com [205.220.177.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 1251710FC; 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Signed-off-by: Mike Christie Reviewed-by: Christoph Hellwig Reviewed-by: Keith Busch Reviewed-by: Chaitanya Kulkarni --- drivers/nvme/host/core.c | 13 +++++++------ 1 file changed, 7 insertions(+), 6 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index ba6f1911f7ea..6323ff79386a 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2072,7 +2072,7 @@ static char nvme_pr_type(enum pr_type type) } static int nvme_send_ns_head_pr_command(struct block_device *bdev, - struct nvme_command *c, u8 data[16]) + struct nvme_command *c, u8 *data, unsigned int data_len) { struct nvme_ns_head *head = bdev->bd_disk->private_data; int srcu_idx = srcu_read_lock(&head->srcu); @@ -2081,17 +2081,17 @@ static int nvme_send_ns_head_pr_command(struct block_device *bdev, if (ns) { c->common.nsid = cpu_to_le32(ns->head->ns_id); - ret = nvme_submit_sync_cmd(ns->queue, c, data, 16); + ret = nvme_submit_sync_cmd(ns->queue, c, data, data_len); } srcu_read_unlock(&head->srcu, srcu_idx); return ret; } static int nvme_send_ns_pr_command(struct nvme_ns *ns, struct nvme_command *c, - u8 data[16]) + u8 *data, unsigned int data_len) { c->common.nsid = cpu_to_le32(ns->head->ns_id); - return nvme_submit_sync_cmd(ns->queue, c, data, 16); + return nvme_submit_sync_cmd(ns->queue, c, data, data_len); } static int nvme_sc_to_pr_err(int nvme_sc) @@ -2131,10 +2131,11 @@ static int nvme_pr_command(struct block_device *bdev, u32 cdw10, if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && bdev->bd_disk->fops == &nvme_ns_head_ops) - ret = nvme_send_ns_head_pr_command(bdev, &c, data); + ret = nvme_send_ns_head_pr_command(bdev, &c, data, + sizeof(data)); else ret = nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, - data); + data, sizeof(data)); if (ret < 0) return ret; From patchwork Fri Feb 24 17:44:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151623 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 CA828C7EE23 for ; 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Fri, 24 Feb 2023 17:45:18 +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 v4 09/18] nvme: Move pr code to it's own file Date: Fri, 24 Feb 2023 11:44:53 -0600 Message-Id: <20230224174502.321490-10-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR03CA0302.namprd03.prod.outlook.com (2603:10b6:8:2b::11) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 15dd2854-af93-4977-37b9-08db168ee516 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Signed-off-by: Mike Christie Reviewed-by: Chaitanya Kulkarni Reviewed-by: Keith Busch --- drivers/nvme/host/Makefile | 2 +- drivers/nvme/host/core.c | 148 ----------------------------------- drivers/nvme/host/nvme.h | 2 + drivers/nvme/host/pr.c | 155 +++++++++++++++++++++++++++++++++++++ 4 files changed, 158 insertions(+), 149 deletions(-) create mode 100644 drivers/nvme/host/pr.c diff --git a/drivers/nvme/host/Makefile b/drivers/nvme/host/Makefile index e27202d22c7d..06c18a65da99 100644 --- a/drivers/nvme/host/Makefile +++ b/drivers/nvme/host/Makefile @@ -10,7 +10,7 @@ obj-$(CONFIG_NVME_FC) += nvme-fc.o obj-$(CONFIG_NVME_TCP) += nvme-tcp.o obj-$(CONFIG_NVME_APPLE) += nvme-apple.o -nvme-core-y += core.o ioctl.o +nvme-core-y += core.o ioctl.o pr.o nvme-core-$(CONFIG_NVME_VERBOSE_ERRORS) += constants.o nvme-core-$(CONFIG_TRACING) += trace.o nvme-core-$(CONFIG_NVME_MULTIPATH) += multipath.o diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 6323ff79386a..69b7fe4aa0c8 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2051,154 +2051,6 @@ static int nvme_update_ns_info(struct nvme_ns *ns, struct nvme_ns_info *info) } } -static char nvme_pr_type(enum pr_type type) -{ - switch (type) { - case PR_WRITE_EXCLUSIVE: - return 1; - case PR_EXCLUSIVE_ACCESS: - return 2; - case PR_WRITE_EXCLUSIVE_REG_ONLY: - return 3; - case PR_EXCLUSIVE_ACCESS_REG_ONLY: - return 4; - case PR_WRITE_EXCLUSIVE_ALL_REGS: - return 5; - case PR_EXCLUSIVE_ACCESS_ALL_REGS: - return 6; - default: - return 0; - } -} - -static int nvme_send_ns_head_pr_command(struct block_device *bdev, - struct nvme_command *c, u8 *data, unsigned int data_len) -{ - struct nvme_ns_head *head = bdev->bd_disk->private_data; - int srcu_idx = srcu_read_lock(&head->srcu); - struct nvme_ns *ns = nvme_find_path(head); - int ret = -EWOULDBLOCK; - - if (ns) { - c->common.nsid = cpu_to_le32(ns->head->ns_id); - ret = nvme_submit_sync_cmd(ns->queue, c, data, data_len); - } - srcu_read_unlock(&head->srcu, srcu_idx); - return ret; -} - -static int nvme_send_ns_pr_command(struct nvme_ns *ns, struct nvme_command *c, - u8 *data, unsigned int data_len) -{ - c->common.nsid = cpu_to_le32(ns->head->ns_id); - return nvme_submit_sync_cmd(ns->queue, c, data, data_len); -} - -static int nvme_sc_to_pr_err(int nvme_sc) -{ - if (nvme_is_path_error(nvme_sc)) - return PR_STS_PATH_FAILED; - - switch (nvme_sc) { - case NVME_SC_SUCCESS: - return PR_STS_SUCCESS; - case NVME_SC_RESERVATION_CONFLICT: - return PR_STS_RESERVATION_CONFLICT; - case NVME_SC_ONCS_NOT_SUPPORTED: - return -EOPNOTSUPP; - case NVME_SC_BAD_ATTRIBUTES: - case NVME_SC_INVALID_OPCODE: - case NVME_SC_INVALID_FIELD: - case NVME_SC_INVALID_NS: - return -EINVAL; - default: - return PR_STS_IOERR; - } -} - -static int nvme_pr_command(struct block_device *bdev, u32 cdw10, - u64 key, u64 sa_key, u8 op) -{ - struct nvme_command c = { }; - u8 data[16] = { 0, }; - int ret; - - put_unaligned_le64(key, &data[0]); - put_unaligned_le64(sa_key, &data[8]); - - c.common.opcode = op; - c.common.cdw10 = cpu_to_le32(cdw10); - - if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && - bdev->bd_disk->fops == &nvme_ns_head_ops) - ret = nvme_send_ns_head_pr_command(bdev, &c, data, - sizeof(data)); - else - ret = nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, - data, sizeof(data)); - if (ret < 0) - return ret; - - return nvme_sc_to_pr_err(ret); -} - -static int nvme_pr_register(struct block_device *bdev, u64 old, - u64 new, unsigned flags) -{ - u32 cdw10; - - if (flags & ~PR_FL_IGNORE_KEY) - return -EOPNOTSUPP; - - cdw10 = old ? 2 : 0; - cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; - cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ - return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); -} - -static int nvme_pr_reserve(struct block_device *bdev, u64 key, - enum pr_type type, unsigned flags) -{ - u32 cdw10; - - if (flags & ~PR_FL_IGNORE_KEY) - return -EOPNOTSUPP; - - cdw10 = nvme_pr_type(type) << 8; - cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); - return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); -} - -static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, - enum pr_type type, bool abort) -{ - u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); - - return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); -} - -static int nvme_pr_clear(struct block_device *bdev, u64 key) -{ - u32 cdw10 = 1 | (key ? 0 : 1 << 3); - - return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); -} - -static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) -{ - u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 0 : 1 << 3); - - return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); -} - -const struct pr_ops nvme_pr_ops = { - .pr_register = nvme_pr_register, - .pr_reserve = nvme_pr_reserve, - .pr_release = nvme_pr_release, - .pr_preempt = nvme_pr_preempt, - .pr_clear = nvme_pr_clear, -}; - #ifdef CONFIG_BLK_SED_OPAL static int nvme_sec_submit(void *data, u16 spsp, u8 secp, void *buffer, size_t len, bool send) diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index bf46f122e9e1..c0762346b441 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -19,6 +19,8 @@ #include +extern const struct pr_ops nvme_pr_ops; + extern unsigned int nvme_io_timeout; #define NVME_IO_TIMEOUT (nvme_io_timeout * HZ) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c new file mode 100644 index 000000000000..26ad25f7280b --- /dev/null +++ b/drivers/nvme/host/pr.c @@ -0,0 +1,155 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include +#include +#include + +#include "nvme.h" + +static char nvme_pr_type(enum pr_type type) +{ + switch (type) { + case PR_WRITE_EXCLUSIVE: + return 1; + case PR_EXCLUSIVE_ACCESS: + return 2; + case PR_WRITE_EXCLUSIVE_REG_ONLY: + return 3; + case PR_EXCLUSIVE_ACCESS_REG_ONLY: + return 4; + case PR_WRITE_EXCLUSIVE_ALL_REGS: + return 5; + case PR_EXCLUSIVE_ACCESS_ALL_REGS: + return 6; + default: + return 0; + } +} + +static int nvme_send_ns_head_pr_command(struct block_device *bdev, + struct nvme_command *c, u8 *data, unsigned int data_len) +{ + struct nvme_ns_head *head = bdev->bd_disk->private_data; + int srcu_idx = srcu_read_lock(&head->srcu); + struct nvme_ns *ns = nvme_find_path(head); + int ret = -EWOULDBLOCK; + + if (ns) { + c->common.nsid = cpu_to_le32(ns->head->ns_id); + ret = nvme_submit_sync_cmd(ns->queue, c, data, data_len); + } + srcu_read_unlock(&head->srcu, srcu_idx); + return ret; +} + +static int nvme_send_ns_pr_command(struct nvme_ns *ns, struct nvme_command *c, + u8 *data, unsigned int data_len) +{ + c->common.nsid = cpu_to_le32(ns->head->ns_id); + return nvme_submit_sync_cmd(ns->queue, c, data, data_len); +} + +static int nvme_sc_to_pr_err(int nvme_sc) +{ + if (nvme_is_path_error(nvme_sc)) + return PR_STS_PATH_FAILED; + + switch (nvme_sc) { + case NVME_SC_SUCCESS: + return PR_STS_SUCCESS; + case NVME_SC_RESERVATION_CONFLICT: + return PR_STS_RESERVATION_CONFLICT; + case NVME_SC_ONCS_NOT_SUPPORTED: + return -EOPNOTSUPP; + case NVME_SC_BAD_ATTRIBUTES: + case NVME_SC_INVALID_OPCODE: + case NVME_SC_INVALID_FIELD: + case NVME_SC_INVALID_NS: + return -EINVAL; + default: + return PR_STS_IOERR; + } +} + +static int nvme_pr_command(struct block_device *bdev, u32 cdw10, + u64 key, u64 sa_key, u8 op) +{ + struct nvme_command c = { }; + u8 data[16] = { 0, }; + int ret; + + put_unaligned_le64(key, &data[0]); + put_unaligned_le64(sa_key, &data[8]); + + c.common.opcode = op; + c.common.cdw10 = cpu_to_le32(cdw10); + + if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && + bdev->bd_disk->fops == &nvme_ns_head_ops) + ret = nvme_send_ns_head_pr_command(bdev, &c, data, + sizeof(data)); + else + ret = nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, + data, sizeof(data)); + if (ret < 0) + return ret; + + return nvme_sc_to_pr_err(ret); +} + +static int nvme_pr_register(struct block_device *bdev, u64 old, + u64 new, unsigned flags) +{ + u32 cdw10; + + if (flags & ~PR_FL_IGNORE_KEY) + return -EOPNOTSUPP; + + cdw10 = old ? 2 : 0; + cdw10 |= (flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0; + cdw10 |= (1 << 30) | (1 << 31); /* PTPL=1 */ + return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register); +} + +static int nvme_pr_reserve(struct block_device *bdev, u64 key, + enum pr_type type, unsigned flags) +{ + u32 cdw10; + + if (flags & ~PR_FL_IGNORE_KEY) + return -EOPNOTSUPP; + + cdw10 = nvme_pr_type(type) << 8; + cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); + return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); +} + +static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, + enum pr_type type, bool abort) +{ + u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); + + return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); +} + +static int nvme_pr_clear(struct block_device *bdev, u64 key) +{ + u32 cdw10 = 1 | (key ? 0 : 1 << 3); + + return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); +} + +static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) +{ + u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 0 : 1 << 3); + + return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); +} + +const struct pr_ops nvme_pr_ops = { + .pr_register = nvme_pr_register, + .pr_reserve = nvme_pr_reserve, + .pr_release = nvme_pr_release, + .pr_preempt = nvme_pr_preempt, + .pr_clear = nvme_pr_clear, +}; From patchwork Fri Feb 24 17:44:54 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151632 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 7836CC7EE31 for ; Fri, 24 Feb 2023 17:48:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229819AbjBXRsK (ORCPT ); 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Signed-off-by: Mike Christie Reviewed-by: Christoph Hellwig --- drivers/nvme/host/pr.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index 26ad25f7280b..7a1d93da4970 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -27,7 +27,7 @@ static char nvme_pr_type(enum pr_type type) } static int nvme_send_ns_head_pr_command(struct block_device *bdev, - struct nvme_command *c, u8 *data, unsigned int data_len) + struct nvme_command *c, void *data, unsigned int data_len) { struct nvme_ns_head *head = bdev->bd_disk->private_data; int srcu_idx = srcu_read_lock(&head->srcu); @@ -43,7 +43,7 @@ static int nvme_send_ns_head_pr_command(struct block_device *bdev, } static int nvme_send_ns_pr_command(struct nvme_ns *ns, struct nvme_command *c, - u8 *data, unsigned int data_len) + void *data, unsigned int data_len) { c->common.nsid = cpu_to_le32(ns->head->ns_id); return nvme_submit_sync_cmd(ns->queue, c, data, data_len); @@ -71,6 +71,17 @@ static int nvme_sc_to_pr_err(int nvme_sc) } } +static int nvme_send_pr_command(struct block_device *bdev, + struct nvme_command *c, void *data, unsigned int data_len) +{ + if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && + bdev->bd_disk->fops == &nvme_ns_head_ops) + return nvme_send_ns_head_pr_command(bdev, c, data, data_len); + else + return nvme_send_ns_pr_command(bdev->bd_disk->private_data, c, + data, data_len); +} + static int nvme_pr_command(struct block_device *bdev, u32 cdw10, u64 key, u64 sa_key, u8 op) { @@ -84,13 +95,7 @@ static int nvme_pr_command(struct block_device *bdev, u32 cdw10, c.common.opcode = op; c.common.cdw10 = cpu_to_le32(cdw10); - if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && - bdev->bd_disk->fops == &nvme_ns_head_ops) - ret = nvme_send_ns_head_pr_command(bdev, &c, data, - sizeof(data)); - else - ret = nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, - data, sizeof(data)); + ret = nvme_send_pr_command(bdev, &c, data, sizeof(data)); if (ret < 0) return ret; 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Fri, 24 Feb 2023 17:45:21 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64%7]) with mapi id 15.20.6156.007; Fri, 24 Feb 2023 17:45:21 +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 Subject: [PATCH v4 11/18] nvme: Add pr_ops read_keys support Date: Fri, 24 Feb 2023 11:44:55 -0600 Message-Id: <20230224174502.321490-12-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR03CA0321.namprd03.prod.outlook.com (2603:10b6:8:2b::6) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: a47c984f-084c-4321-e13c-08db168ee6ad X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Because the callout is only used in the kernel where the callers, like LIO, do not know about controller/host IDs, the callout just returns the registered keys which is required by the SCSI PR in READ KEYS command. Signed-off-by: Mike Christie --- drivers/nvme/host/pr.c | 65 ++++++++++++++++++++++++++++++++++++++++++ include/linux/nvme.h | 4 +++ 2 files changed, 69 insertions(+) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index 7a1d93da4970..ac6b9008e7e1 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -151,10 +151,75 @@ static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); } +static int nvme_pr_resv_report(struct block_device *bdev, void *data, + u32 data_len, bool *eds) +{ + struct nvme_command c = { }; + int ret; + + c.common.opcode = nvme_cmd_resv_report; + c.common.cdw10 = cpu_to_le32(nvme_bytes_to_numd(data_len)); + c.common.cdw11 = NVME_EXTENDED_DATA_STRUCT; + *eds = true; + +retry: + ret = nvme_send_pr_command(bdev, &c, data, data_len); + if (ret == NVME_SC_HOST_ID_INCONSIST && + c.common.cdw11 == NVME_EXTENDED_DATA_STRUCT) { + c.common.cdw11 = 0; + *eds = false; + goto retry; + } + + if (ret < 0) + return ret; + + return nvme_sc_to_pr_err(ret); +} + +static int nvme_pr_read_keys(struct block_device *bdev, + struct pr_keys *keys_info) +{ + u32 rs_len, num_keys = keys_info->num_keys; + struct nvme_reservation_status *rs; + int ret, i; + bool eds; + + /* + * Assume we are using 128-bit host IDs and allocate a buffer large + * enough to get enough keys to fill the return keys buffer. + */ + rs_len = sizeof(*rs) + + num_keys * sizeof(struct nvme_registered_ctrl_ext); + rs = kzalloc(rs_len, GFP_KERNEL); + if (!rs) + return -ENOMEM; + + ret = nvme_pr_resv_report(bdev, rs, rs_len, &eds); + if (ret) + goto free_rs; + + keys_info->generation = le32_to_cpu(rs->gen); + keys_info->num_keys = get_unaligned_le16(&rs->regctl); + + num_keys = min(num_keys, keys_info->num_keys); + for (i = 0; i < num_keys; i++) { + if (eds) + keys_info->keys[i] = le64_to_cpu(rs->regctl_eds[i].rkey); + else + keys_info->keys[i] = le64_to_cpu(rs->regctl_ds[i].rkey); + } + +free_rs: + kfree(rs); + return ret; +} + const struct pr_ops nvme_pr_ops = { .pr_register = nvme_pr_register, .pr_reserve = nvme_pr_reserve, .pr_release = nvme_pr_release, .pr_preempt = nvme_pr_preempt, .pr_clear = nvme_pr_clear, + .pr_read_keys = nvme_pr_read_keys, }; diff --git a/include/linux/nvme.h b/include/linux/nvme.h index c8c504926462..50fc596ec888 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -759,6 +759,10 @@ enum { NVME_LBART_ATTRIB_HIDE = 1 << 1, }; +enum nvme_eds { + NVME_EXTENDED_DATA_STRUCT = 0x1, +}; + struct nvme_registered_ctrl { __le16 cntlid; __u8 rcsts; From patchwork Fri Feb 24 17:44:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151631 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 DAE6BC7EE3A for ; 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Fri, 24 Feb 2023 17:45:22 +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 Subject: [PATCH v4 12/18] nvme: Add a nvme_pr_type enum Date: Fri, 24 Feb 2023 11:44:56 -0600 Message-Id: <20230224174502.321490-13-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR03CA0305.namprd03.prod.outlook.com (2603:10b6:8:2b::25) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 6540f1ab-ce3e-4f21-e941-08db168ee75b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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To prepare for that, this patch adds a nvme_pr_type enum and renames the nvme_pr_type function. Signed-off-by: Mike Christie Reviewed-by: Chaitanya Kulkarni Reviewed-by: Christoph Hellwig --- Note for Chaitanya, Keith and Bart. For these patches where we convert between block and nvme pr values, it seemed like Chaitanya and Keith didn't have a strong preference. Bart had the suggestion to keep the switch and drop the default so the compiler can warn us if new types are added. This seemed like a nice benefit so I went that way. drivers/nvme/host/pr.c | 24 ++++++++++++------------ include/linux/nvme.h | 9 +++++++++ 2 files changed, 21 insertions(+), 12 deletions(-) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index ac6b9008e7e1..66086369dbce 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -6,24 +6,24 @@ #include "nvme.h" -static char nvme_pr_type(enum pr_type type) +static enum nvme_pr_type nvme_pr_type_from_blk(enum pr_type type) { switch (type) { case PR_WRITE_EXCLUSIVE: - return 1; + return NVME_PR_WRITE_EXCLUSIVE; case PR_EXCLUSIVE_ACCESS: - return 2; + return NVME_PR_EXCLUSIVE_ACCESS; case PR_WRITE_EXCLUSIVE_REG_ONLY: - return 3; + return NVME_PR_WRITE_EXCLUSIVE_REG_ONLY; case PR_EXCLUSIVE_ACCESS_REG_ONLY: - return 4; + return NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY; case PR_WRITE_EXCLUSIVE_ALL_REGS: - return 5; + return NVME_PR_WRITE_EXCLUSIVE_ALL_REGS; case PR_EXCLUSIVE_ACCESS_ALL_REGS: - return 6; - default: - return 0; + return NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS; } + + return 0; } static int nvme_send_ns_head_pr_command(struct block_device *bdev, @@ -124,7 +124,7 @@ static int nvme_pr_reserve(struct block_device *bdev, u64 key, if (flags & ~PR_FL_IGNORE_KEY) return -EOPNOTSUPP; - cdw10 = nvme_pr_type(type) << 8; + cdw10 = nvme_pr_type_from_blk(type) << 8; cdw10 |= ((flags & PR_FL_IGNORE_KEY) ? 1 << 3 : 0); return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire); } @@ -132,7 +132,7 @@ static int nvme_pr_reserve(struct block_device *bdev, u64 key, static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, enum pr_type type, bool abort) { - u32 cdw10 = nvme_pr_type(type) << 8 | (abort ? 2 : 1); + u32 cdw10 = nvme_pr_type_from_blk(type) << 8 | (abort ? 2 : 1); return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); } @@ -146,7 +146,7 @@ static int nvme_pr_clear(struct block_device *bdev, u64 key) static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type) { - u32 cdw10 = nvme_pr_type(type) << 8 | (key ? 0 : 1 << 3); + u32 cdw10 = nvme_pr_type_from_blk(type) << 8 | (key ? 0 : 1 << 3); return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release); } diff --git a/include/linux/nvme.h b/include/linux/nvme.h index 50fc596ec888..bae08167735a 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -759,6 +759,15 @@ enum { NVME_LBART_ATTRIB_HIDE = 1 << 1, }; +enum nvme_pr_type { + NVME_PR_WRITE_EXCLUSIVE = 1, + NVME_PR_EXCLUSIVE_ACCESS = 2, + NVME_PR_WRITE_EXCLUSIVE_REG_ONLY = 3, + NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY = 4, + NVME_PR_WRITE_EXCLUSIVE_ALL_REGS = 5, + NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS = 6, +}; + enum nvme_eds { NVME_EXTENDED_DATA_STRUCT = 0x1, }; From patchwork Fri Feb 24 17:44:57 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151628 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 AC8EEC7EE30 for ; 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Fri, 24 Feb 2023 17:45:24 +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 Subject: [PATCH v4 13/18] nvme: Add pr_ops read_reservation support Date: Fri, 24 Feb 2023 11:44:57 -0600 Message-Id: <20230224174502.321490-14-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DM6PR03CA0025.namprd03.prod.outlook.com (2603:10b6:5:40::38) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: cabcc001-d3f4-48da-3f10-08db168ee818 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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It then parses that info to detect if there is a reservation and if there is then convert the returned info to a pr_ops pr_held_reservation struct. Signed-off-by: Mike Christie Reviewed-by: Chaitanya Kulkarni --- drivers/nvme/host/pr.c | 81 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 81 insertions(+) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index 66086369dbce..cadf61dc60c3 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -26,6 +26,26 @@ static enum nvme_pr_type nvme_pr_type_from_blk(enum pr_type type) return 0; } +static enum pr_type block_pr_type_from_nvme(enum nvme_pr_type type) +{ + switch (type) { + case NVME_PR_WRITE_EXCLUSIVE: + return PR_WRITE_EXCLUSIVE; + case NVME_PR_EXCLUSIVE_ACCESS: + return PR_EXCLUSIVE_ACCESS; + case NVME_PR_WRITE_EXCLUSIVE_REG_ONLY: + return PR_WRITE_EXCLUSIVE_REG_ONLY; + case NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY: + return PR_EXCLUSIVE_ACCESS_REG_ONLY; + case NVME_PR_WRITE_EXCLUSIVE_ALL_REGS: + return PR_WRITE_EXCLUSIVE_ALL_REGS; + case NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS: + return NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS; + } + + return 0; +} + static int nvme_send_ns_head_pr_command(struct block_device *bdev, struct nvme_command *c, void *data, unsigned int data_len) { @@ -215,6 +235,66 @@ static int nvme_pr_read_keys(struct block_device *bdev, return ret; } +static int nvme_pr_read_reservation(struct block_device *bdev, + struct pr_held_reservation *resv) +{ + struct nvme_reservation_status tmp_rs, *rs; + int ret, i, num_regs; + u32 rs_len; + bool eds; + +get_num_regs: + /* + * Get the number of registrations so we know how big to allocate + * the response buffer. + */ + ret = nvme_pr_resv_report(bdev, &tmp_rs, sizeof(tmp_rs), &eds); + if (ret) + return ret; + + num_regs = get_unaligned_le16(&tmp_rs.regctl); + if (!num_regs) { + resv->generation = le32_to_cpu(tmp_rs.gen); + return 0; + } + + rs_len = sizeof(*rs) + + num_regs * sizeof(struct nvme_registered_ctrl_ext); + rs = kzalloc(rs_len, GFP_KERNEL); + if (!rs) + return -ENOMEM; + + ret = nvme_pr_resv_report(bdev, rs, rs_len, &eds); + if (ret) + goto free_rs; + + if (num_regs != get_unaligned_le16(&rs->regctl)) { + kfree(rs); + goto get_num_regs; + } + + resv->generation = le32_to_cpu(rs->gen); + resv->type = block_pr_type_from_nvme(rs->rtype); + + for (i = 0; i < num_regs; i++) { + if (eds) { + if (rs->regctl_eds[i].rcsts) { + resv->key = le64_to_cpu(rs->regctl_eds[i].rkey); + break; + } + } else { + if (rs->regctl_ds[i].rcsts) { + resv->key = le64_to_cpu(rs->regctl_ds[i].rkey); + break; + } + } + } + +free_rs: + kfree(rs); + return ret; +} + const struct pr_ops nvme_pr_ops = { .pr_register = nvme_pr_register, .pr_reserve = nvme_pr_reserve, @@ -222,4 +302,5 @@ const struct pr_ops nvme_pr_ops = { .pr_preempt = nvme_pr_preempt, .pr_clear = nvme_pr_clear, .pr_read_keys = nvme_pr_read_keys, + .pr_read_reservation = nvme_pr_read_reservation, }; From patchwork Fri Feb 24 17:44:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151634 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 C3B54C7EE2F for ; Fri, 24 Feb 2023 17:48:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229838AbjBXRsP (ORCPT ); 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bh=zsWPgf3lxVpJrhgy1Lk5+dJ1206CLLPepev3QZNrx94=; b=U+1OZ9gO0AssFbCevdqxLyTLxAXBa5NcNxBR6n9Xeg+joqndjPeBPiqI3Xff1UBM0VAJSBW9Ms5fMHCkl/g7gzEuxu3fNW3KCElwzu2uvK7pCbfdkp/vz8gqlr2BvsEJgR0c2vNwk+NnFPJFjuU7mHVuvhawA8bdBYdwmx4KDUw= Received: from DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) by CH0PR10MB7535.namprd10.prod.outlook.com (2603:10b6:610:187::21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6156.7; Fri, 24 Feb 2023 17:45:25 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::7dd7:8d22:104:8d64%7]) with mapi id 15.20.6156.007; Fri, 24 Feb 2023 17:45:25 +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 Subject: [PATCH v4 14/18] scsi: target: Rename sbc_ops to exec_cmd_ops Date: Fri, 24 Feb 2023 11:44:58 -0600 Message-Id: <20230224174502.321490-15-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR05CA0056.namprd05.prod.outlook.com (2603:10b6:8:2f::17) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 2cef3e57-260b-401c-92c6-08db168ee8f3 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This will require allowing the backends to hook into the cmd processing for SPC commands, so this renames sbc_ops to a more generic exec_cmd_ops. Signed-off-by: Mike Christie Reviewed-by: Christoph Hellwig --- drivers/target/target_core_file.c | 4 ++-- drivers/target/target_core_iblock.c | 4 ++-- drivers/target/target_core_rd.c | 4 ++-- drivers/target/target_core_sbc.c | 13 +++++++------ drivers/target/target_core_spc.c | 4 ++-- include/target/target_core_backend.h | 4 ++-- 6 files changed, 17 insertions(+), 16 deletions(-) diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c index ce0e000b74fc..4d447520bab8 100644 --- a/drivers/target/target_core_file.c +++ b/drivers/target/target_core_file.c @@ -896,7 +896,7 @@ static void fd_free_prot(struct se_device *dev) fd_dev->fd_prot_file = NULL; } -static struct sbc_ops fd_sbc_ops = { +static struct exec_cmd_ops fd_exec_cmd_ops = { .execute_rw = fd_execute_rw, .execute_sync_cache = fd_execute_sync_cache, .execute_write_same = fd_execute_write_same, @@ -906,7 +906,7 @@ static struct sbc_ops fd_sbc_ops = { static sense_reason_t fd_parse_cdb(struct se_cmd *cmd) { - return sbc_parse_cdb(cmd, &fd_sbc_ops); + return sbc_parse_cdb(cmd, &fd_exec_cmd_ops); } static const struct target_backend_ops fileio_ops = { diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index cc838ffd1294..d93f24f9687d 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -869,7 +869,7 @@ static unsigned int iblock_get_io_opt(struct se_device *dev) return bdev_io_opt(bd); } -static struct sbc_ops iblock_sbc_ops = { +static struct exec_cmd_ops iblock_exec_cmd_ops = { .execute_rw = iblock_execute_rw, .execute_sync_cache = iblock_execute_sync_cache, .execute_write_same = iblock_execute_write_same, @@ -879,7 +879,7 @@ static struct sbc_ops iblock_sbc_ops = { static sense_reason_t iblock_parse_cdb(struct se_cmd *cmd) { - return sbc_parse_cdb(cmd, &iblock_sbc_ops); + return sbc_parse_cdb(cmd, &iblock_exec_cmd_ops); } static bool iblock_get_write_cache(struct se_device *dev) diff --git a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c index 6648c1c90e19..6f67cc09c2b5 100644 --- a/drivers/target/target_core_rd.c +++ b/drivers/target/target_core_rd.c @@ -643,14 +643,14 @@ static void rd_free_prot(struct se_device *dev) rd_release_prot_space(rd_dev); } -static struct sbc_ops rd_sbc_ops = { +static struct exec_cmd_ops rd_exec_cmd_ops = { .execute_rw = rd_execute_rw, }; static sense_reason_t rd_parse_cdb(struct se_cmd *cmd) { - return sbc_parse_cdb(cmd, &rd_sbc_ops); + return sbc_parse_cdb(cmd, &rd_exec_cmd_ops); } static const struct target_backend_ops rd_mcp_ops = { diff --git a/drivers/target/target_core_sbc.c b/drivers/target/target_core_sbc.c index 7536ca797606..6a02561cc20c 100644 --- a/drivers/target/target_core_sbc.c +++ b/drivers/target/target_core_sbc.c @@ -192,7 +192,7 @@ EXPORT_SYMBOL(sbc_get_write_same_sectors); static sense_reason_t sbc_execute_write_same_unmap(struct se_cmd *cmd) { - struct sbc_ops *ops = cmd->protocol_data; + struct exec_cmd_ops *ops = cmd->protocol_data; sector_t nolb = sbc_get_write_same_sectors(cmd); sense_reason_t ret; @@ -271,7 +271,8 @@ static inline unsigned long long transport_lba_64(unsigned char *cdb) } static sense_reason_t -sbc_setup_write_same(struct se_cmd *cmd, unsigned char flags, struct sbc_ops *ops) +sbc_setup_write_same(struct se_cmd *cmd, unsigned char flags, + struct exec_cmd_ops *ops) { struct se_device *dev = cmd->se_dev; sector_t end_lba = dev->transport->get_blocks(dev) + 1; @@ -340,7 +341,7 @@ sbc_setup_write_same(struct se_cmd *cmd, unsigned char flags, struct sbc_ops *op static sense_reason_t sbc_execute_rw(struct se_cmd *cmd) { - struct sbc_ops *ops = cmd->protocol_data; + struct exec_cmd_ops *ops = cmd->protocol_data; return ops->execute_rw(cmd, cmd->t_data_sg, cmd->t_data_nents, cmd->data_direction); @@ -566,7 +567,7 @@ static sense_reason_t compare_and_write_callback(struct se_cmd *cmd, bool succes static sense_reason_t sbc_compare_and_write(struct se_cmd *cmd) { - struct sbc_ops *ops = cmd->protocol_data; + struct exec_cmd_ops *ops = cmd->protocol_data; struct se_device *dev = cmd->se_dev; sense_reason_t ret; int rc; @@ -764,7 +765,7 @@ sbc_check_dpofua(struct se_device *dev, struct se_cmd *cmd, unsigned char *cdb) } sense_reason_t -sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops) +sbc_parse_cdb(struct se_cmd *cmd, struct exec_cmd_ops *ops) { struct se_device *dev = cmd->se_dev; unsigned char *cdb = cmd->t_task_cdb; @@ -1076,7 +1077,7 @@ EXPORT_SYMBOL(sbc_get_device_type); static sense_reason_t sbc_execute_unmap(struct se_cmd *cmd) { - struct sbc_ops *ops = cmd->protocol_data; + struct exec_cmd_ops *ops = cmd->protocol_data; struct se_device *dev = cmd->se_dev; unsigned char *buf, *ptr = NULL; sector_t lba; diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index fcc7b10a7ae3..00d34616df5d 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1431,7 +1431,7 @@ static struct target_opcode_descriptor tcm_opcode_write_verify16 = { static bool tcm_is_ws_enabled(struct se_cmd *cmd) { - struct sbc_ops *ops = cmd->protocol_data; + struct exec_cmd_ops *ops = cmd->protocol_data; struct se_device *dev = cmd->se_dev; return (dev->dev_attrib.emulate_tpws && !!ops->execute_unmap) || @@ -1544,7 +1544,7 @@ static struct target_opcode_descriptor tcm_opcode_sync_cache16 = { static bool tcm_is_unmap_enabled(struct se_cmd *cmd) { - struct sbc_ops *ops = cmd->protocol_data; + struct exec_cmd_ops *ops = cmd->protocol_data; struct se_device *dev = cmd->se_dev; return ops->execute_unmap && dev->dev_attrib.emulate_tpu; diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h index a3c193df25b3..c5df78959532 100644 --- a/include/target/target_core_backend.h +++ b/include/target/target_core_backend.h @@ -62,7 +62,7 @@ struct target_backend_ops { struct configfs_attribute **tb_dev_action_attrs; }; -struct sbc_ops { +struct exec_cmd_ops { sense_reason_t (*execute_rw)(struct se_cmd *cmd, struct scatterlist *, u32, enum dma_data_direction); sense_reason_t (*execute_sync_cache)(struct se_cmd *cmd); @@ -86,7 +86,7 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd *cmd); sense_reason_t spc_emulate_inquiry_std(struct se_cmd *, unsigned char *); sense_reason_t spc_emulate_evpd_83(struct se_cmd *, unsigned char *); -sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct sbc_ops *ops); +sense_reason_t sbc_parse_cdb(struct se_cmd *cmd, struct exec_cmd_ops *ops); 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Both are good for specific uses however for the case where you want good performance, and are not using SCSI devices directly (using DM/MD RAID or multipath devices) then we are out of luck. The following patches allow iblock to mimimally hook into the LIO PR code and then pass the PR handling to the physical device. Note that like with the tcmu an pscsi cases it's only supported when you export the device via one I_T nexus. This patch adds the initial LIO callouts. The next patch will modify iblock. Signed-off-by: Mike Christie Reviewed-by: Christoph Hellwig --- drivers/target/target_core_pr.c | 62 +++++++++++++++++++++++++++- include/target/target_core_backend.h | 4 ++ 2 files changed, 65 insertions(+), 1 deletion(-) diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index 1493b1d01194..e16ef7d676af 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -3538,6 +3538,25 @@ core_scsi3_emulate_pro_register_and_move(struct se_cmd *cmd, u64 res_key, return ret; } +static sense_reason_t +target_try_pr_out_pt(struct se_cmd *cmd, u8 sa, u64 res_key, u64 sa_res_key, + u8 type, bool aptpl, bool all_tg_pt, bool spec_i_pt) +{ + struct exec_cmd_ops *ops = cmd->protocol_data; + + if (!cmd->se_sess || !cmd->se_lun) { + pr_err("SPC-3 PR: se_sess || struct se_lun is NULL!\n"); + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + } + + if (!ops->execute_pr_out) { + pr_err("SPC-3 PR: Device has been configured for PR passthrough but it's not supported by the backend.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + return ops->execute_pr_out(cmd, sa, res_key, sa_res_key, type, aptpl); +} + /* * See spc4r17 section 6.14 Table 170 */ @@ -3641,6 +3660,12 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd) return TCM_PARAMETER_LIST_LENGTH_ERROR; } + if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) { + ret = target_try_pr_out_pt(cmd, sa, res_key, sa_res_key, type, + aptpl, all_tg_pt, spec_i_pt); + goto done; + } + /* * (core_scsi3_emulate_pro_* function parameters * are defined by spc4r17 Table 174: @@ -3682,6 +3707,7 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd) return TCM_INVALID_CDB_FIELD; } +done: if (!ret) target_complete_cmd(cmd, SAM_STAT_GOOD); return ret; @@ -4039,9 +4065,37 @@ core_scsi3_pri_read_full_status(struct se_cmd *cmd) return 0; } +static sense_reason_t target_try_pr_in_pt(struct se_cmd *cmd, u8 sa) +{ + struct exec_cmd_ops *ops = cmd->protocol_data; + unsigned char *buf; + sense_reason_t ret; + + if (cmd->data_length < 8) { + pr_err("PRIN SA SCSI Data Length: %u too small\n", + cmd->data_length); + return TCM_INVALID_CDB_FIELD; + } + + if (!ops->execute_pr_in) { + pr_err("SPC-3 PR: Device has been configured for PR passthrough but it's not supported by the backend.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + buf = transport_kmap_data_sg(cmd); + if (!buf) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + ret = ops->execute_pr_in(cmd, sa, buf); + + transport_kunmap_data_sg(cmd); + return ret; +} + sense_reason_t target_scsi3_emulate_pr_in(struct se_cmd *cmd) { + u8 sa = cmd->t_task_cdb[1] & 0x1f; sense_reason_t ret; /* @@ -4060,7 +4114,12 @@ target_scsi3_emulate_pr_in(struct se_cmd *cmd) return TCM_RESERVATION_CONFLICT; } - switch (cmd->t_task_cdb[1] & 0x1f) { + if (cmd->se_dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) { + ret = target_try_pr_in_pt(cmd, sa); + goto done; + } + + switch (sa) { case PRI_READ_KEYS: ret = core_scsi3_pri_read_keys(cmd); break; @@ -4079,6 +4138,7 @@ target_scsi3_emulate_pr_in(struct se_cmd *cmd) return TCM_INVALID_CDB_FIELD; } +done: if (!ret) target_complete_cmd(cmd, SAM_STAT_GOOD); return ret; diff --git a/include/target/target_core_backend.h b/include/target/target_core_backend.h index c5df78959532..739df993aa5e 100644 --- a/include/target/target_core_backend.h +++ b/include/target/target_core_backend.h @@ -69,6 +69,10 @@ struct exec_cmd_ops { sense_reason_t (*execute_write_same)(struct se_cmd *cmd); sense_reason_t (*execute_unmap)(struct se_cmd *cmd, sector_t lba, sector_t nolb); + sense_reason_t (*execute_pr_out)(struct se_cmd *cmd, u8 sa, u64 key, + u64 sa_key, u8 type, bool aptpl); + sense_reason_t (*execute_pr_in)(struct se_cmd *cmd, u8 sa, + unsigned char *param_data); }; int transport_backend_register(const struct target_backend_ops *); From patchwork Fri Feb 24 17:45:00 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151630 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 D5AB8C7EE23 for ; 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Fri, 24 Feb 2023 17:45:28 +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 Subject: [PATCH v4 16/18] scsi: target: Pass struct target_opcode_descriptor to enabled Date: Fri, 24 Feb 2023 11:45:00 -0600 Message-Id: <20230224174502.321490-17-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR05CA0040.namprd05.prod.outlook.com (2603:10b6:8:2f::33) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|CH0PR10MB7535:EE_ X-MS-Office365-Filtering-Correlation-Id: 6fa3cbf2-958b-463c-fcb8-08db168eeacd X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This adds a struct target_opcode_descriptor as an argument to the enabled callout so we can still have the common tcm_is_pr_enabled and tcm_is_scsi2_reservations_enabled functions and also determine if the command is supported based on the command and service action and device settings. Signed-off-by: Mike Christie --- drivers/target/target_core_spc.c | 40 +++++++++++++++++++------------ include/target/target_core_base.h | 3 ++- 2 files changed, 27 insertions(+), 16 deletions(-) diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 00d34616df5d..caf8d1325007 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1429,7 +1429,8 @@ static struct target_opcode_descriptor tcm_opcode_write_verify16 = { .update_usage_bits = set_dpofua_usage_bits, }; -static bool tcm_is_ws_enabled(struct se_cmd *cmd) +static bool tcm_is_ws_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct exec_cmd_ops *ops = cmd->protocol_data; struct se_device *dev = cmd->se_dev; @@ -1456,7 +1457,8 @@ static struct target_opcode_descriptor tcm_opcode_write_same32 = { .update_usage_bits = set_dpofua_usage_bits32, }; -static bool tcm_is_caw_enabled(struct se_cmd *cmd) +static bool tcm_is_caw_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; @@ -1496,7 +1498,8 @@ static struct target_opcode_descriptor tcm_opcode_read_capacity16 = { 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, }; -static bool tcm_is_rep_ref_enabled(struct se_cmd *cmd) +static bool tcm_is_rep_ref_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; @@ -1507,7 +1510,6 @@ static bool tcm_is_rep_ref_enabled(struct se_cmd *cmd) } spin_unlock(&dev->t10_alua.lba_map_lock); return true; - } static struct target_opcode_descriptor tcm_opcode_read_report_refferals = { @@ -1542,7 +1544,8 @@ static struct target_opcode_descriptor tcm_opcode_sync_cache16 = { 0xff, 0xff, SCSI_GROUP_NUMBER_MASK, SCSI_CONTROL_MASK}, }; -static bool tcm_is_unmap_enabled(struct se_cmd *cmd) +static bool tcm_is_unmap_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct exec_cmd_ops *ops = cmd->protocol_data; struct se_device *dev = cmd->se_dev; @@ -1664,7 +1667,8 @@ static struct target_opcode_descriptor tcm_opcode_pri_read_resrv = { 0xff, SCSI_CONTROL_MASK}, }; -static bool tcm_is_pr_enabled(struct se_cmd *cmd) +static bool tcm_is_pr_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; @@ -1793,7 +1797,9 @@ static struct target_opcode_descriptor tcm_opcode_pro_register_move = { .enabled = tcm_is_pr_enabled, }; -static bool tcm_is_scsi2_reservations_enabled(struct se_cmd *cmd) +static bool +tcm_is_scsi2_reservations_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; @@ -1854,7 +1860,8 @@ static struct target_opcode_descriptor tcm_opcode_inquiry = { 0xff, SCSI_CONTROL_MASK}, }; -static bool tcm_is_3pc_enabled(struct se_cmd *cmd) +static bool tcm_is_3pc_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; @@ -1915,8 +1922,8 @@ static struct target_opcode_descriptor tcm_opcode_report_target_pgs = { 0xff, 0xff, 0x00, SCSI_CONTROL_MASK}, }; - -static bool spc_rsoc_enabled(struct se_cmd *cmd) +static bool spc_rsoc_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct se_device *dev = cmd->se_dev; @@ -1936,7 +1943,8 @@ static struct target_opcode_descriptor tcm_opcode_report_supp_opcodes = { .enabled = spc_rsoc_enabled, }; -static bool tcm_is_set_tpg_enabled(struct se_cmd *cmd) +static bool tcm_is_set_tpg_enabled(struct target_opcode_descriptor *descr, + struct se_cmd *cmd) { struct t10_alua_tg_pt_gp *l_tg_pt_gp; struct se_lun *l_lun = cmd->se_lun; @@ -2123,7 +2131,7 @@ spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode) if (descr->serv_action_valid) return TCM_INVALID_CDB_FIELD; - if (!descr->enabled || descr->enabled(cmd)) + if (!descr->enabled || descr->enabled(descr, cmd)) *opcode = descr; break; case 0x2: @@ -2137,7 +2145,8 @@ spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode) */ if (descr->serv_action_valid && descr->service_action == requested_sa) { - if (!descr->enabled || descr->enabled(cmd)) + if (!descr->enabled || descr->enabled(descr, + cmd)) *opcode = descr; } else if (!descr->serv_action_valid) return TCM_INVALID_CDB_FIELD; @@ -2150,7 +2159,8 @@ spc_rsoc_get_descr(struct se_cmd *cmd, struct target_opcode_descriptor **opcode) * be returned in the one_command parameter data format. */ if (descr->service_action == requested_sa) - if (!descr->enabled || descr->enabled(cmd)) + if (!descr->enabled || descr->enabled(descr, + cmd)) *opcode = descr; break; } @@ -2207,7 +2217,7 @@ spc_emulate_report_supp_op_codes(struct se_cmd *cmd) for (i = 0; i < ARRAY_SIZE(tcm_supported_opcodes); i++) { descr = tcm_supported_opcodes[i]; - if (descr->enabled && !descr->enabled(cmd)) + if (descr->enabled && !descr->enabled(descr, cmd)) continue; response_length += spc_rsoc_encode_command_descriptor( diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index 12c9ba16217e..04646b3dbf75 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -878,7 +878,8 @@ struct target_opcode_descriptor { u8 specific_timeout; u16 nominal_timeout; u16 recommended_timeout; - bool (*enabled)(struct se_cmd *cmd); + bool (*enabled)(struct target_opcode_descriptor *descr, + struct se_cmd *cmd); void (*update_usage_bits)(u8 *usage_bits, struct se_device *dev); u8 usage_bits[]; From patchwork Fri Feb 24 17:45:01 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151636 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 3BE67C7EE23 for ; Fri, 24 Feb 2023 17:48:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229845AbjBXRsT (ORCPT ); Fri, 24 Feb 2023 12:48:19 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229811AbjBXRsH (ORCPT ); Fri, 24 Feb 2023 12:48:07 -0500 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 44D3A10FC; 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This patch has us report we don't support those types of commands and fail them. Signed-off-by: Mike Christie --- drivers/target/target_core_pr.c | 17 ++++++++ drivers/target/target_core_spc.c | 75 +++++++++++++++++++++++--------- 2 files changed, 72 insertions(+), 20 deletions(-) diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index e16ef7d676af..7a3f07979a02 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -3554,6 +3554,18 @@ target_try_pr_out_pt(struct se_cmd *cmd, u8 sa, u64 res_key, u64 sa_res_key, return TCM_UNSUPPORTED_SCSI_OPCODE; } + switch (sa) { + case PRO_REGISTER_AND_MOVE: + case PRO_REPLACE_LOST_RESERVATION: + pr_err("SPC-3 PR: PRO_REGISTER_AND_MOVE and PRO_REPLACE_LOST_RESERVATION are not supported by PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + if (spec_i_pt || all_tg_pt) { + pr_err("SPC-3 PR: SPEC_I_PT and ALL_TG_PT are not supported by PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + return ops->execute_pr_out(cmd, sa, res_key, sa_res_key, type, aptpl); } @@ -4082,6 +4094,11 @@ static sense_reason_t target_try_pr_in_pt(struct se_cmd *cmd, u8 sa) return TCM_UNSUPPORTED_SCSI_OPCODE; } + if (sa == PRI_READ_FULL_STATUS) { + pr_err("SPC-3 PR: PRI_READ_FULL_STATUS is not supported by PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + buf = transport_kmap_data_sg(cmd); if (!buf) return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index caf8d1325007..053bd2eea0e6 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1672,7 +1672,41 @@ static bool tcm_is_pr_enabled(struct target_opcode_descriptor *descr, { struct se_device *dev = cmd->se_dev; - return dev->dev_attrib.emulate_pr; + if (!dev->dev_attrib.emulate_pr) + return false; + + if (!(dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR)) + return true; + + switch (descr->opcode) { + case RESERVE: + case RESERVE_10: + case RELEASE: + case RELEASE_10: + /* + * The pr_ops which are used by the backend modules don't + * support these commands. + */ + return false; + case PERSISTENT_RESERVE_OUT: + switch (descr->service_action) { + case PRO_REGISTER_AND_MOVE: + case PRO_REPLACE_LOST_RESERVATION: + /* + * The backend modules don't have access to ports and + * I_T nexuses so they can't handle these type of + * requests. + */ + return false; + } + break; + case PERSISTENT_RESERVE_IN: + if (descr->service_action == PRI_READ_FULL_STATUS) + return false; + break; + } + + return true; } static struct target_opcode_descriptor tcm_opcode_pri_read_caps = { @@ -1797,22 +1831,13 @@ static struct target_opcode_descriptor tcm_opcode_pro_register_move = { .enabled = tcm_is_pr_enabled, }; -static bool -tcm_is_scsi2_reservations_enabled(struct target_opcode_descriptor *descr, - struct se_cmd *cmd) -{ - struct se_device *dev = cmd->se_dev; - - return dev->dev_attrib.emulate_pr; -} - static struct target_opcode_descriptor tcm_opcode_release = { .support = SCSI_SUPPORT_FULL, .opcode = RELEASE, .cdb_size = 6, .usage_bits = {RELEASE, 0x00, 0x00, 0x00, 0x00, SCSI_CONTROL_MASK}, - .enabled = tcm_is_scsi2_reservations_enabled, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_release10 = { @@ -1822,7 +1847,7 @@ static struct target_opcode_descriptor tcm_opcode_release10 = { .usage_bits = {RELEASE_10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, SCSI_CONTROL_MASK}, - .enabled = tcm_is_scsi2_reservations_enabled, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_reserve = { @@ -1831,7 +1856,7 @@ static struct target_opcode_descriptor tcm_opcode_reserve = { .cdb_size = 6, .usage_bits = {RESERVE, 0x00, 0x00, 0x00, 0x00, SCSI_CONTROL_MASK}, - .enabled = tcm_is_scsi2_reservations_enabled, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_reserve10 = { @@ -1841,7 +1866,7 @@ static struct target_opcode_descriptor tcm_opcode_reserve10 = { .usage_bits = {RESERVE_10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, SCSI_CONTROL_MASK}, - .enabled = tcm_is_scsi2_reservations_enabled, + .enabled = tcm_is_pr_enabled, }; static struct target_opcode_descriptor tcm_opcode_request_sense = { @@ -2246,12 +2271,22 @@ spc_parse_cdb(struct se_cmd *cmd, unsigned int *size) struct se_device *dev = cmd->se_dev; unsigned char *cdb = cmd->t_task_cdb; - if (!dev->dev_attrib.emulate_pr && - ((cdb[0] == PERSISTENT_RESERVE_IN) || - (cdb[0] == PERSISTENT_RESERVE_OUT) || - (cdb[0] == RELEASE || cdb[0] == RELEASE_10) || - (cdb[0] == RESERVE || cdb[0] == RESERVE_10))) { - return TCM_UNSUPPORTED_SCSI_OPCODE; + switch (cdb[0]) { + case RESERVE: + case RESERVE_10: + case RELEASE: + case RELEASE_10: + if (!dev->dev_attrib.emulate_pr) + return TCM_UNSUPPORTED_SCSI_OPCODE; + + if (dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) + return TCM_UNSUPPORTED_SCSI_OPCODE; + break; + case PERSISTENT_RESERVE_IN: + case PERSISTENT_RESERVE_OUT: + if (!dev->dev_attrib.emulate_pr) + return TCM_UNSUPPORTED_SCSI_OPCODE; + break; } switch (cdb[0]) { From patchwork Fri Feb 24 17:45:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 13151635 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 E643CC7EE30 for ; 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Fri, 24 Feb 2023 17:45:31 +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 Subject: [PATCH v4 18/18] scsi: target: Add block PR support to iblock Date: Fri, 24 Feb 2023 11:45:02 -0600 Message-Id: <20230224174502.321490-19-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230224174502.321490-1-michael.christie@oracle.com> References: <20230224174502.321490-1-michael.christie@oracle.com> X-ClientProxiedBy: DS7PR05CA0033.namprd05.prod.outlook.com (2603:10b6:8:2f::20) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|DS0PR10MB6245:EE_ X-MS-Office365-Filtering-Correlation-Id: 3eeac00c-bee0-471b-5658-08db168eec76 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This patch doesn't attempt to implement the entire spec because there's no way support it all like SPEC_I_PT and ALL_TG_PT. This only supports exporting the iblock device from one path on the local target. Signed-off-by: Mike Christie --- drivers/target/target_core_iblock.c | 269 +++++++++++++++++++++++++++- 1 file changed, 264 insertions(+), 5 deletions(-) diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index d93f24f9687d..9d60259b03fd 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -23,13 +23,16 @@ #include #include #include +#include #include +#include #include #include #include #include "target_core_iblock.h" +#include "target_core_pr.h" #define IBLOCK_MAX_BIO_PER_TASK 32 /* max # of bios to submit at a time */ #define IBLOCK_BIO_POOL_SIZE 128 @@ -310,7 +313,7 @@ static sector_t iblock_get_blocks(struct se_device *dev) return blocks_long; } -static void iblock_complete_cmd(struct se_cmd *cmd) +static void iblock_complete_cmd(struct se_cmd *cmd, blk_status_t blk_status) { struct iblock_req *ibr = cmd->priv; u8 status; @@ -318,7 +321,9 @@ static void iblock_complete_cmd(struct se_cmd *cmd) if (!refcount_dec_and_test(&ibr->pending)) return; - if (atomic_read(&ibr->ib_bio_err_cnt)) + if (blk_status == BLK_STS_RESV_CONFLICT) + status = SAM_STAT_RESERVATION_CONFLICT; + else if (atomic_read(&ibr->ib_bio_err_cnt)) status = SAM_STAT_CHECK_CONDITION; else status = SAM_STAT_GOOD; @@ -331,6 +336,7 @@ static void iblock_bio_done(struct bio *bio) { struct se_cmd *cmd = bio->bi_private; struct iblock_req *ibr = cmd->priv; + blk_status_t blk_status = bio->bi_status; if (bio->bi_status) { pr_err("bio error: %p, err: %d\n", bio, bio->bi_status); @@ -343,7 +349,7 @@ static void iblock_bio_done(struct bio *bio) bio_put(bio); - iblock_complete_cmd(cmd); + iblock_complete_cmd(cmd, blk_status); } static struct bio *iblock_get_bio(struct se_cmd *cmd, sector_t lba, u32 sg_num, @@ -759,7 +765,7 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, if (!sgl_nents) { refcount_set(&ibr->pending, 1); - iblock_complete_cmd(cmd); + iblock_complete_cmd(cmd, BLK_STS_OK); return 0; } @@ -817,7 +823,7 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, } iblock_submit_bios(&list); - iblock_complete_cmd(cmd); + iblock_complete_cmd(cmd, BLK_STS_OK); return 0; fail_put_bios: @@ -829,6 +835,256 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents, return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; } +static sense_reason_t iblock_execute_pr_out(struct se_cmd *cmd, u8 sa, u64 key, + u64 sa_key, u8 type, bool aptpl) +{ + struct se_device *dev = cmd->se_dev; + struct iblock_dev *ib_dev = IBLOCK_DEV(dev); + struct block_device *bdev = ib_dev->ibd_bd; + const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; + int ret; + + if (!ops) { + pr_err("Block device does not support pr_ops but iblock device has been configured for PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + switch (sa) { + case PRO_REGISTER: + case PRO_REGISTER_AND_IGNORE_EXISTING_KEY: + if (!ops->pr_register) { + pr_err("block device does not support pr_register.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + /* The block layer pr ops always enables aptpl */ + if (!aptpl) + pr_info("APTPL not set by initiator, but will be used.\n"); + + ret = ops->pr_register(bdev, key, sa_key, + sa == PRO_REGISTER ? 0 : PR_FL_IGNORE_KEY); + break; + case PRO_RESERVE: + if (!ops->pr_reserve) { + pr_err("block_device does not support pr_reserve.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + ret = ops->pr_reserve(bdev, key, scsi_pr_type_to_block(type), 0); + break; + case PRO_CLEAR: + if (!ops->pr_clear) { + pr_err("block_device does not support pr_clear.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + ret = ops->pr_clear(bdev, key); + break; + case PRO_PREEMPT: + case PRO_PREEMPT_AND_ABORT: + if (!ops->pr_clear) { + pr_err("block_device does not support pr_preempt.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + ret = ops->pr_preempt(bdev, key, sa_key, + scsi_pr_type_to_block(type), + sa == PRO_PREEMPT ? false : true); + break; + case PRO_RELEASE: + if (!ops->pr_clear) { + pr_err("block_device does not support pr_pclear.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + ret = ops->pr_release(bdev, key, scsi_pr_type_to_block(type)); + break; + default: + pr_err("Unknown PERSISTENT_RESERVE_OUT SA: 0x%02x\n", sa); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + if (!ret) + return TCM_NO_SENSE; + else if (ret == PR_STS_RESERVATION_CONFLICT) + return TCM_RESERVATION_CONFLICT; + else + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; +} + +static void iblock_pr_report_caps(unsigned char *param_data) +{ + u16 len = 8; + + put_unaligned_be16(len, ¶m_data[0]); + /* + * When using the pr_ops passthrough method we only support exporting + * the device through one target port because from the backend module + * level we can't see the target port config. As a result we only + * support registration directly from the I_T nexus the cmd is sent + * through and do not set ATP_C here. + * + * The block layer pr_ops do not support passing in initiators so + * we don't set SIP_C here. + */ + /* PTPL_C: Persistence across Target Power Loss bit */ + param_data[2] |= 0x01; + /* + * We are filling in the PERSISTENT RESERVATION TYPE MASK below, so + * set the TMV: Task Mask Valid bit. + */ + param_data[3] |= 0x80; + /* + * Change ALLOW COMMANDs to 0x20 or 0x40 later from Table 166 + */ + param_data[3] |= 0x10; /* ALLOW COMMANDs field 001b */ + /* + * PTPL_A: Persistence across Target Power Loss Active bit. The block + * layer pr ops always enables this so report it active. + */ + param_data[3] |= 0x01; + /* + * Setup the PERSISTENT RESERVATION TYPE MASK from Table 212 spc4r37. + */ + param_data[4] |= 0x80; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ + param_data[4] |= 0x40; /* PR_TYPE_EXCLUSIVE_ACCESS_REGONLY */ + param_data[4] |= 0x20; /* PR_TYPE_WRITE_EXCLUSIVE_REGONLY */ + param_data[4] |= 0x08; /* PR_TYPE_EXCLUSIVE_ACCESS */ + param_data[4] |= 0x02; /* PR_TYPE_WRITE_EXCLUSIVE */ + param_data[5] |= 0x01; /* PR_TYPE_EXCLUSIVE_ACCESS_ALLREG */ +} + +static int iblock_pr_read_keys(struct se_cmd *cmd, unsigned char *param_data) +{ + struct se_device *dev = cmd->se_dev; + struct iblock_dev *ib_dev = IBLOCK_DEV(dev); + struct block_device *bdev = ib_dev->ibd_bd; + const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; + int i, ret, len, paths, data_offset; + struct pr_keys *keys; + + if (!ops) { + pr_err("Block device does not support pr_ops but iblock device has been configured for PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + if (!ops->pr_read_keys) { + pr_err("Block device does not support read_keys.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + /* + * We don't know what's under us, but dm-multipath will register every + * path with the same key, so start off with enough space for 16 paths. + */ + paths = 16; +retry: + len = 8 * paths; + keys = kzalloc(sizeof(*keys) + len, GFP_KERNEL); + if (!keys) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + keys->num_keys = paths; + ret = ops->pr_read_keys(bdev, keys); + if (!ret) { + if (keys->num_keys > paths) { + kfree(keys); + paths *= 2; + goto retry; + } + } else if (ret) { + ret = TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + goto free_keys; + } + + ret = TCM_NO_SENSE; + + put_unaligned_be32(keys->generation, ¶m_data[0]); + if (!keys->num_keys) { + put_unaligned_be32(0, ¶m_data[4]); + goto free_keys; + } + + put_unaligned_be32(8 * keys->num_keys, ¶m_data[4]); + + data_offset = 8; + for (i = 0; i < keys->num_keys; i++) { + if (data_offset + 8 > cmd->data_length) + break; + + put_unaligned_be64(keys->keys[i], ¶m_data[data_offset]); + data_offset += 8; + } + +free_keys: + kfree(keys); + return ret; +} + +static int iblock_pr_read_reservation(struct se_cmd *cmd, + unsigned char *param_data) +{ + struct se_device *dev = cmd->se_dev; + struct iblock_dev *ib_dev = IBLOCK_DEV(dev); + struct block_device *bdev = ib_dev->ibd_bd; + const struct pr_ops *ops = bdev->bd_disk->fops->pr_ops; + struct pr_held_reservation rsv = { }; + + if (!ops) { + pr_err("Block device does not support pr_ops but iblock device has been configured for PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + if (!ops->pr_read_reservation) { + pr_err("Block device does not support read_keys.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + if (ops->pr_read_reservation(bdev, &rsv)) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; + + put_unaligned_be32(rsv.generation, ¶m_data[0]); + if (!block_pr_type_to_scsi(rsv.type)) { + put_unaligned_be32(0, ¶m_data[4]); + return TCM_NO_SENSE; + } + + put_unaligned_be32(16, ¶m_data[4]); + + if (cmd->data_length < 16) + return TCM_NO_SENSE; + put_unaligned_be64(rsv.key, ¶m_data[8]); + + if (cmd->data_length < 22) + return TCM_NO_SENSE; + param_data[21] = block_pr_type_to_scsi(rsv.type); + + return TCM_NO_SENSE; +} + +static sense_reason_t iblock_execute_pr_in(struct se_cmd *cmd, u8 sa, + unsigned char *param_data) +{ + sense_reason_t ret = TCM_NO_SENSE; + + switch (sa) { + case PRI_REPORT_CAPABILITIES: + iblock_pr_report_caps(param_data); + break; + case PRI_READ_KEYS: + ret = iblock_pr_read_keys(cmd, param_data); + break; + case PRI_READ_RESERVATION: + ret = iblock_pr_read_reservation(cmd, param_data); + break; + default: + pr_err("Unknown PERSISTENT_RESERVE_IN SA: 0x%02x\n", sa); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + return ret; +} + static sector_t iblock_get_alignment_offset_lbas(struct se_device *dev) { struct iblock_dev *ib_dev = IBLOCK_DEV(dev); @@ -874,6 +1130,8 @@ static struct exec_cmd_ops iblock_exec_cmd_ops = { .execute_sync_cache = iblock_execute_sync_cache, .execute_write_same = iblock_execute_write_same, .execute_unmap = iblock_execute_unmap, + .execute_pr_out = iblock_execute_pr_out, + .execute_pr_in = iblock_execute_pr_in, }; static sense_reason_t @@ -890,6 +1148,7 @@ static bool iblock_get_write_cache(struct se_device *dev) static const struct target_backend_ops iblock_ops = { .name = "iblock", .inquiry_prod = "IBLOCK", + .transport_flags_changeable = TRANSPORT_FLAG_PASSTHROUGH_PGR, .inquiry_rev = IBLOCK_VERSION, .owner = THIS_MODULE, .attach_hba = iblock_attach_hba,