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Wed, 26 Oct 2022 23:19:50 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df%7]) with mapi id 15.20.5746.028; Wed, 26 Oct 2022 23:19:49 +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 v3 01/19] block: Add PR callouts for read keys and reservation Date: Wed, 26 Oct 2022 18:19:27 -0500 Message-Id: <20221026231945.6609-2-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH0PR04CA0068.namprd04.prod.outlook.com (2603:10b6:610:74::13) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|DS7PR10MB5117:EE_ X-MS-Office365-Filtering-Correlation-Id: 6c2bc16e-50a7-4ff8-8bad-08dab7a89451 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 --- include/linux/pr.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/include/linux/pr.h b/include/linux/pr.h index 94ceec713afe..55c9ab7a202b 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 +26,18 @@ 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 is keys_len bytes. If there are more + * keys 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, u32 keys_len); + int (*pr_read_reservation)(struct block_device *bdev, + struct pr_held_reservation *rsv); }; #endif /* LINUX_PR_H */ From patchwork Wed Oct 26 23:19:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619450 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 7695DFA3744 for ; Wed, 26 Oct 2022 23:22:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233844AbiJZXW6 (ORCPT ); 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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 187b4fe2bc2b..4dc5c932fbd3 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1714,7 +1714,7 @@ static char sd_pr_type(enum pr_type type) } }; -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); @@ -1768,7 +1768,7 @@ 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 */); } @@ -1778,24 +1778,24 @@ static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, { if (flags) return -EOPNOTSUPP; - return sd_pr_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); + return sd_pr_out_command(bdev, 0x01, key, 0, sd_pr_type(type), 0); } static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) { - return sd_pr_command(bdev, 0x02, key, 0, sd_pr_type(type), 0); + return sd_pr_out_command(bdev, 0x02, key, 0, sd_pr_type(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_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, + return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, sd_pr_type(type), 0); } static int sd_pr_clear(struct block_device *bdev, u64 key) { - return sd_pr_command(bdev, 0x03, key, 0, 0, 0); + return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0); } static const struct pr_ops sd_pr_ops = { From patchwork Wed Oct 26 23:19:29 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619136 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 9A8A9C433FE for ; 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Wed, 26 Oct 2022 23:19:53 +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 v3 03/19] scsi: Move sd_pr_type to header to share Date: Wed, 26 Oct 2022 18:19:29 -0500 Message-Id: <20221026231945.6609-4-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH0PR04CA0084.namprd04.prod.outlook.com (2603:10b6:610:74::29) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|DS7PR10MB5117:EE_ X-MS-Office365-Filtering-Correlation-Id: 0a34542f-eb2d-43da-b66f-08dab7a8966e 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 --- drivers/scsi/sd.c | 31 +++++++------------------------ include/scsi/scsi_block_pr.h | 36 ++++++++++++++++++++++++++++++++++++ 2 files changed, 43 insertions(+), 24 deletions(-) create mode 100644 include/scsi/scsi_block_pr.h diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 4dc5c932fbd3..ad9374b07585 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" @@ -1694,28 +1695,8 @@ 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_pr_out_command(struct block_device *bdev, u8 sa, - u64 key, u64 sa_key, u8 type, u8 flags) + 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; @@ -1778,19 +1759,21 @@ 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..6e99f844330d --- /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; + default: + return 0; + } +}; + +#endif From patchwork Wed Oct 26 23:19:30 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619447 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 D3DC4FA3742 for ; Wed, 26 Oct 2022 23:25:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233790AbiJZXZG (ORCPT ); Wed, 26 Oct 2022 19:25:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46646 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233784AbiJZXYl (ORCPT ); Wed, 26 Oct 2022 19:24:41 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 928B915747C; 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Signed-off-by: Mike Christie --- drivers/scsi/sd.c | 104 +++++++++++++++++++++++++++++++++++ include/scsi/scsi_block_pr.h | 20 +++++++ include/scsi/scsi_proto.h | 5 ++ 3 files changed, 129 insertions(+) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index ad9374b07585..86b602399000 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1695,6 +1695,108 @@ static int sd_get_unique_id(struct gendisk *disk, u8 id[16], return ret; } +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 }; + struct scsi_failure failures[] = { + { + .sense = UNIT_ATTENTION, + .asc = SCMD_FAILURE_ASC_ANY, + .ascq = SCMD_FAILURE_ASCQ_ANY, + .allowed = 5, + .result = SAM_STAT_CHECK_CONDITION, + }, + {}, + }; + int result; + + put_unaligned_be16(data_len, &cmd[7]); + + result = scsi_exec_req(((struct scsi_exec_args) { + .sdev = sdev, + .cmd = cmd, + .data_dir = DMA_FROM_DEVICE, + .buf = data, + .buf_len = data_len, + .sshdr = &sshdr, + .timeout = SD_TIMEOUT, + .retries = sdkp->max_retries, + .failures = failures })); + 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); + } + + return result; +} + +static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info, + u32 keys_len) +{ + int result, i, data_offset, num_copy_keys; + int data_len = keys_len + 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(keys_len / 8, 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] = { 0, }; + int result, len; + + result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data)); + if (result) + return result; + + memset(rsv, 0, sizeof(*rsv)); + len = get_unaligned_be32(&data[4]); + if (!len) + return result; + + /* 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) { @@ -1787,6 +1889,8 @@ 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 6e99f844330d..137bf2247273 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) } }; +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; + default: + return 0; + } +} + #endif diff --git a/include/scsi/scsi_proto.h b/include/scsi/scsi_proto.h index c03e35fc382c..0fd6e295375a 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 Wed Oct 26 23:19:31 2022 Content-Type: text/plain; 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Signed-off-by: Mike Christie --- drivers/md/dm.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/drivers/md/dm.c b/drivers/md/dm.c index 95a1ee3d314e..f7f806890c92 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -3312,12 +3312,56 @@ 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, + u32 keys_len) +{ + 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, keys_len); + 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 Wed Oct 26 23:19:32 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619444 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 9B9E9FA373E for ; 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Wed, 26 Oct 2022 23:19:57 +0000 From: Mike Christie To: bvanassche@acm.org, hch@lst.de, martin.petersen@oracle.com, linux-scsi@vger.kernel.org, james.bottomley@hansenpartnership.com, linux-block@vger.kernel.org, dm-devel@redhat.com, snitzer@kernel.org, axboe@kernel.dk, linux-nvme@lists.infradead.org, chaitanyak@nvidia.com, kbusch@kernel.org, target-devel@vger.kernel.org Cc: Mike Christie Subject: [PATCH v3 06/19] nvme: Fix reservation status related structs Date: Wed, 26 Oct 2022 18:19:32 -0500 Message-Id: <20221026231945.6609-7-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH2PR10CA0005.namprd10.prod.outlook.com (2603:10b6:610:4c::15) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|DS7PR10MB5117:EE_ X-MS-Office365-Filtering-Correlation-Id: 78e65c10-a66d-4dcd-c67e-08dab7a898f4 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 --- 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 050d7d0cd81b..3ab141d982d1 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -757,20 +757,37 @@ 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 Wed Oct 26 23:19:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619134 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 AEDBBFA373D for ; Wed, 26 Oct 2022 23:25:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234208AbiJZXZO (ORCPT ); Wed, 26 Oct 2022 19:25:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233923AbiJZXYt (ORCPT ); Wed, 26 Oct 2022 19:24:49 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB84F60EA; 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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 | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index dc4220600585..a79fa710d012 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2082,7 +2082,7 @@ 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); @@ -2091,17 +2091,17 @@ 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_pr_command(struct block_device *bdev, u32 cdw10, @@ -2118,8 +2118,10 @@ 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) - return nvme_send_ns_head_pr_command(bdev, &c, data); - return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, data); + return nvme_send_ns_head_pr_command(bdev, &c, data, + sizeof(data)); + return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, data, + sizeof(data)); } static int nvme_pr_register(struct block_device *bdev, u64 old, From patchwork Wed Oct 26 23:19:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619135 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 BDF75C433FE for ; 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Wed, 26 Oct 2022 23:20:00 +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 v3 08/19] nvme: Move pr code to it's own file Date: Wed, 26 Oct 2022 18:19:34 -0500 Message-Id: <20221026231945.6609-9-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH2PR10CA0011.namprd10.prod.outlook.com (2603:10b6:610:4c::21) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|DS7PR10MB5117:EE_ X-MS-Office365-Filtering-Correlation-Id: 7f21984f-71d8-41a3-d4be-08dab7a89a6f 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: Keith Busch Reviewed-by: Chaitanya Kulkarni --- drivers/nvme/host/Makefile | 2 +- drivers/nvme/host/core.c | 120 ----------------------------------- drivers/nvme/host/nvme.h | 2 + drivers/nvme/host/pr.c | 127 +++++++++++++++++++++++++++++++++++++ 4 files changed, 130 insertions(+), 121 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 a79fa710d012..2de9c42094a6 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -2061,126 +2061,6 @@ 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_pr_command(struct block_device *bdev, u32 cdw10, - u64 key, u64 sa_key, u8 op) -{ - struct nvme_command c = { }; - u8 data[16] = { 0, }; - - 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) - return nvme_send_ns_head_pr_command(bdev, &c, data, - sizeof(data)); - return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, data, - sizeof(data)); -} - -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 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 a29877217ee6..e82be1f1373d 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..aa88c55879b2 --- /dev/null +++ b/drivers/nvme/host/pr.c @@ -0,0 +1,127 @@ +// 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_pr_command(struct block_device *bdev, u32 cdw10, + u64 key, u64 sa_key, u8 op) +{ + struct nvme_command c = { }; + u8 data[16] = { 0, }; + + 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) + return nvme_send_ns_head_pr_command(bdev, &c, data, + sizeof(data)); + return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, data, + sizeof(data)); +} + +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 Wed Oct 26 23:19:35 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619137 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 EC416C38A2D for ; Wed, 26 Oct 2022 23:23:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234305AbiJZXXP (ORCPT ); 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Because the callout is only used in the kernel where the callers 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 | 73 ++++++++++++++++++++++++++++++++++++++++++ include/linux/nvme.h | 4 +++ 2 files changed, 77 insertions(+) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index aa88c55879b2..df7eb2440c67 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -118,10 +118,83 @@ 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, u8 *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: + if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && + bdev->bd_disk->fops == &nvme_ns_head_ops) + ret = nvme_send_ns_head_pr_command(bdev, &c, data, data_len); + else + ret = nvme_send_ns_pr_command(bdev->bd_disk->private_data, &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; + } + + return ret; +} + +static int nvme_pr_read_keys(struct block_device *bdev, + struct pr_keys *keys_info, u32 keys_len) +{ + struct nvme_reservation_status *status; + u32 data_len, num_ret_keys; + int ret, i; + bool eds; + u8 *data; + + /* + * Assume we are using 128-bit host IDs and allocate a buffer large + * enough to get enough keys to fill the return keys buffer. + */ + num_ret_keys = keys_len / 8; + data_len = sizeof(*status) + + num_ret_keys * sizeof(struct nvme_registered_ctrl_ext); + data = kzalloc(data_len, GFP_KERNEL); + if (!data) + return -ENOMEM; + + ret = nvme_pr_resv_report(bdev, data, data_len, &eds); + if (ret) + goto free_data; + + status = (struct nvme_reservation_status *)data; + keys_info->generation = le32_to_cpu(status->gen); + keys_info->num_keys = get_unaligned_le16(&status->regctl); + + num_ret_keys = min(num_ret_keys, keys_info->num_keys); + for (i = 0; i < num_ret_keys; i++) { + if (eds) { + keys_info->keys[i] = + le64_to_cpu(status->regctl_eds[i].rkey); + } else { + keys_info->keys[i] = + le64_to_cpu(status->regctl_ds[i].rkey); + } + } + +free_data: + kfree(data); + 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 3ab141d982d1..5bc9c84dc216 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -757,6 +757,10 @@ 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 Wed Oct 26 23:19:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619446 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 C732AFA3742 for ; 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Wed, 26 Oct 2022 23:20:02 +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 v3 10/19] nvme: Move NVMe and Block PR types to an array Date: Wed, 26 Oct 2022 18:19:36 -0500 Message-Id: <20221026231945.6609-11-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH2PR10CA0012.namprd10.prod.outlook.com (2603:10b6:610:4c::22) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|DS7PR10MB5117:EE_ X-MS-Office365-Filtering-Correlation-Id: ba374dd7-d96a-429f-6a05-08dab7a89c13 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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This moves us to an array, so in the next patch we can add another helper to do the conversion without having to manage 2 switches. Signed-off-by: Mike Christie --- drivers/nvme/host/pr.c | 42 +++++++++++++++++++++++------------------- include/linux/nvme.h | 9 +++++++++ 2 files changed, 32 insertions(+), 19 deletions(-) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index df7eb2440c67..5c4611d15d9c 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -6,24 +6,28 @@ #include "nvme.h" -static char nvme_pr_type(enum pr_type type) +static const struct { + enum nvme_pr_type nvme_type; + enum pr_type blk_type; +} nvme_pr_types[] = { + { NVME_PR_WRITE_EXCLUSIVE, PR_WRITE_EXCLUSIVE }, + { NVME_PR_EXCLUSIVE_ACCESS, PR_EXCLUSIVE_ACCESS }, + { NVME_PR_WRITE_EXCLUSIVE_REG_ONLY, PR_WRITE_EXCLUSIVE_REG_ONLY }, + { NVME_PR_EXCLUSIVE_ACCESS_REG_ONLY, PR_EXCLUSIVE_ACCESS_REG_ONLY }, + { NVME_PR_WRITE_EXCLUSIVE_ALL_REGS, PR_WRITE_EXCLUSIVE_ALL_REGS }, + { NVME_PR_EXCLUSIVE_ACCESS_ALL_REGS, PR_EXCLUSIVE_ACCESS_ALL_REGS }, +}; + +static enum nvme_pr_type nvme_pr_type_from_blk(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; + int i; + + for (i = 0; i < ARRAY_SIZE(nvme_pr_types); i++) { + if (nvme_pr_types[i].blk_type == type) + return nvme_pr_types[i].nvme_type; } + + return 0; } static int nvme_send_ns_head_pr_command(struct block_device *bdev, @@ -91,7 +95,7 @@ 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); } @@ -99,7 +103,7 @@ 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); } @@ -113,7 +117,7 @@ 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 5bc9c84dc216..d0bd15f527fc 100644 --- a/include/linux/nvme.h +++ b/include/linux/nvme.h @@ -757,6 +757,15 @@ 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, }; 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Wed, 26 Oct 2022 23:20:04 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df%7]) with mapi id 15.20.5746.028; Wed, 26 Oct 2022 23:20:04 +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 v3 11/19] nvme: Add pr_ops read_reservation support Date: Wed, 26 Oct 2022 18:19:37 -0500 Message-Id: <20221026231945.6609-12-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH0PR03CA0256.namprd03.prod.outlook.com (2603:10b6:610:e5::21) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|DS7PR10MB5117:EE_ X-MS-Office365-Filtering-Correlation-Id: 90901428-e77f-41d4-5b99-08dab7a89cec 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 --- drivers/nvme/host/pr.c | 79 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 79 insertions(+) diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index 5c4611d15d9c..87a0aaf811f4 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -30,6 +30,18 @@ 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) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(nvme_pr_types); i++) { + if (nvme_pr_types[i].nvme_type == type) + return nvme_pr_types[i].blk_type; + } + + return 0; +} + static int nvme_send_ns_head_pr_command(struct block_device *bdev, struct nvme_command *c, u8 *data, unsigned int data_len) { @@ -194,6 +206,72 @@ 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_status, *status; + int ret, i, num_regs; + u32 data_len; + bool eds; + u8 *data; + + memset(resv, 0, sizeof(*resv)); +retry: + /* + * Get the number of registrations so we know how big to allocate + * the response buffer. + */ + ret = nvme_pr_resv_report(bdev, (u8 *)&tmp_status, sizeof(tmp_status), + &eds); + if (ret) + return 0; + + num_regs = get_unaligned_le16(&tmp_status.regctl); + if (!num_regs) { + resv->generation = le32_to_cpu(tmp_status.gen); + return 0; + } + + data_len = sizeof(*status) + + num_regs * sizeof(struct nvme_registered_ctrl_ext); + data = kzalloc(data_len, GFP_KERNEL); + if (!data) + return -ENOMEM; + + ret = nvme_pr_resv_report(bdev, data, data_len, &eds); + if (ret) + goto free_data; + status = (struct nvme_reservation_status *)data; + + if (num_regs != get_unaligned_le16(&status->regctl)) { + kfree(data); + goto retry; + } + + resv->generation = le32_to_cpu(status->gen); + resv->type = block_pr_type_from_nvme(status->rtype); + + for (i = 0; i < num_regs; i++) { + if (eds) { + if (status->regctl_eds[i].rcsts) { + resv->key = + le64_to_cpu(status->regctl_eds[i].rkey); + break; + } + } else { + if (status->regctl_ds[i].rcsts) { + resv->key = + le64_to_cpu(status->regctl_ds[i].rkey); + break; + } + } + } + +free_data: + kfree(data); + return ret; +} + const struct pr_ops nvme_pr_ops = { .pr_register = nvme_pr_register, .pr_reserve = nvme_pr_reserve, @@ -201,4 +279,5 @@ 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 Wed Oct 26 23:19:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619131 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 DC3BDFA3743 for ; Wed, 26 Oct 2022 23:25:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234385AbiJZXZq (ORCPT ); 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Windows clustering and test tools like libiscsi require this. dm-multipath would also like to be able to distiguish between path failures and reservation conflict so they can optimize their error handlers for their pr_ops. To do this they currently have to know the lower level device type and how to convert between that driver's error code and SCSI. Just knowing the device type is difficult because we can have layers like dm-multipath between us and dm-multipath only knows the layer below it is a block device. To handle both cases and keep userspace compatibility, this patch adds a blk_status_t arg to the pr_ops callouts. The lower levels will convert their device specific error to the blk_status_t then the upper levels can easily check that code without knowing the device type. Adding the extra return value will then allow us to not break userspace which expects a negative -Exyz error code if the command fails before it's sent to the device or a device/driver specific value if the error is > 0. This patch just wires in the blk_status_t to the pr_ops callouts. The next patches will then have the drivers pass up a blk_status_t. Signed-off-by: Mike Christie --- block/ioctl.c | 11 ++++++----- drivers/md/dm.c | 41 +++++++++++++++++++++++++--------------- drivers/nvme/host/pr.c | 16 +++++++++------- drivers/scsi/sd.c | 21 +++++++++++--------- fs/nfs/blocklayout/dev.c | 4 ++-- fs/nfsd/blocklayout.c | 6 +++--- include/linux/pr.h | 17 ++++++++++------- 7 files changed, 68 insertions(+), 48 deletions(-) diff --git a/block/ioctl.c b/block/ioctl.c index 60121e89052b..72338c56e235 100644 --- a/block/ioctl.c +++ b/block/ioctl.c @@ -269,7 +269,8 @@ static int blkdev_pr_register(struct block_device *bdev, if (reg.flags & ~PR_FL_IGNORE_KEY) return -EOPNOTSUPP; - return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags); + return ops->pr_register(bdev, reg.old_key, reg.new_key, reg.flags, + NULL); } static int blkdev_pr_reserve(struct block_device *bdev, @@ -287,7 +288,7 @@ static int blkdev_pr_reserve(struct block_device *bdev, if (rsv.flags & ~PR_FL_IGNORE_KEY) return -EOPNOTSUPP; - return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags); + return ops->pr_reserve(bdev, rsv.key, rsv.type, rsv.flags, NULL); } static int blkdev_pr_release(struct block_device *bdev, @@ -305,7 +306,7 @@ static int blkdev_pr_release(struct block_device *bdev, if (rsv.flags) return -EOPNOTSUPP; - return ops->pr_release(bdev, rsv.key, rsv.type); + return ops->pr_release(bdev, rsv.key, rsv.type, NULL); } static int blkdev_pr_preempt(struct block_device *bdev, @@ -323,7 +324,7 @@ static int blkdev_pr_preempt(struct block_device *bdev, if (p.flags) return -EOPNOTSUPP; - return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort); + return ops->pr_preempt(bdev, p.old_key, p.new_key, p.type, abort, NULL); } static int blkdev_pr_clear(struct block_device *bdev, @@ -341,7 +342,7 @@ static int blkdev_pr_clear(struct block_device *bdev, if (c.flags) return -EOPNOTSUPP; - return ops->pr_clear(bdev, c.key); + return ops->pr_clear(bdev, c.key, NULL); } static int blkdev_flushbuf(struct block_device *bdev, fmode_t mode, diff --git a/drivers/md/dm.c b/drivers/md/dm.c index f7f806890c92..7e77c836a61a 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -3079,7 +3079,8 @@ struct dm_pr { bool abort; bool fail_early; int ret; - enum pr_type type; + enum pr_type type; + blk_status_t *blk_stat; }; static int dm_call_pr(struct block_device *bdev, iterate_devices_callout_fn fn, @@ -3130,7 +3131,8 @@ static int __dm_pr_register(struct dm_target *ti, struct dm_dev *dev, return -1; } - ret = ops->pr_register(dev->bdev, pr->old_key, pr->new_key, pr->flags); + ret = ops->pr_register(dev->bdev, pr->old_key, pr->new_key, pr->flags, + pr->blk_stat); if (!ret) return 0; @@ -3144,7 +3146,7 @@ static int __dm_pr_register(struct dm_target *ti, struct dm_dev *dev, } static int dm_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, - u32 flags) + u32 flags, blk_status_t *blk_stat) { struct dm_pr pr = { .old_key = old_key, @@ -3152,6 +3154,7 @@ static int dm_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, .flags = flags, .fail_early = true, .ret = 0, + .blk_stat = blk_stat, }; int ret; @@ -3189,7 +3192,8 @@ static int __dm_pr_reserve(struct dm_target *ti, struct dm_dev *dev, return -1; } - pr->ret = ops->pr_reserve(dev->bdev, pr->old_key, pr->type, pr->flags); + pr->ret = ops->pr_reserve(dev->bdev, pr->old_key, pr->type, pr->flags, + pr->blk_stat); if (!pr->ret) return -1; @@ -3197,7 +3201,7 @@ static int __dm_pr_reserve(struct dm_target *ti, struct dm_dev *dev, } static int dm_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, - u32 flags) + u32 flags, blk_status_t *blk_stat) { struct dm_pr pr = { .old_key = key, @@ -3205,6 +3209,7 @@ static int dm_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, .type = type, .fail_early = false, .ret = 0, + .blk_stat = blk_stat, }; int ret; @@ -3232,19 +3237,22 @@ static int __dm_pr_release(struct dm_target *ti, struct dm_dev *dev, return -1; } - pr->ret = ops->pr_release(dev->bdev, pr->old_key, pr->type); + pr->ret = ops->pr_release(dev->bdev, pr->old_key, pr->type, + pr->blk_stat); if (pr->ret) return -1; return 0; } -static int dm_pr_release(struct block_device *bdev, u64 key, enum pr_type type) +static int dm_pr_release(struct block_device *bdev, u64 key, enum pr_type type, + blk_status_t *blk_stat) { struct dm_pr pr = { .old_key = key, .type = type, .fail_early = false, + .blk_stat = blk_stat, }; int ret; @@ -3267,7 +3275,7 @@ static int __dm_pr_preempt(struct dm_target *ti, struct dm_dev *dev, } pr->ret = ops->pr_preempt(dev->bdev, pr->old_key, pr->new_key, pr->type, - pr->abort); + pr->abort, pr->blk_stat); if (!pr->ret) return -1; @@ -3275,13 +3283,14 @@ static int __dm_pr_preempt(struct dm_target *ti, struct dm_dev *dev, } static int dm_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, - enum pr_type type, bool abort) + enum pr_type type, bool abort, blk_status_t *blk_stat) { struct dm_pr pr = { .new_key = new_key, .old_key = old_key, .type = type, .fail_early = false, + .blk_stat = blk_stat, }; int ret; @@ -3292,7 +3301,8 @@ static int dm_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, return pr.ret; } -static int dm_pr_clear(struct block_device *bdev, u64 key) +static int dm_pr_clear(struct block_device *bdev, u64 key, + blk_status_t *blk_stat) { struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; @@ -3304,7 +3314,7 @@ static int dm_pr_clear(struct block_device *bdev, u64 key) ops = bdev->bd_disk->fops->pr_ops; if (ops && ops->pr_clear) - r = ops->pr_clear(bdev, key); + r = ops->pr_clear(bdev, key, blk_stat); else r = -EOPNOTSUPP; out: @@ -3313,7 +3323,7 @@ static int dm_pr_clear(struct block_device *bdev, u64 key) } static int dm_pr_read_keys(struct block_device *bdev, struct pr_keys *keys, - u32 keys_len) + u32 keys_len, blk_status_t *blk_stat) { struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; @@ -3325,7 +3335,7 @@ static int dm_pr_read_keys(struct block_device *bdev, struct pr_keys *keys, ops = bdev->bd_disk->fops->pr_ops; if (ops && ops->pr_read_keys) - r = ops->pr_read_keys(bdev, keys, keys_len); + r = ops->pr_read_keys(bdev, keys, keys_len, blk_stat); else r = -EOPNOTSUPP; out: @@ -3334,7 +3344,8 @@ static int dm_pr_read_keys(struct block_device *bdev, struct pr_keys *keys, } static int dm_pr_read_reservation(struct block_device *bdev, - struct pr_held_reservation *rsv) + struct pr_held_reservation *rsv, + blk_status_t *blk_stat) { struct mapped_device *md = bdev->bd_disk->private_data; const struct pr_ops *ops; @@ -3346,7 +3357,7 @@ static int dm_pr_read_reservation(struct block_device *bdev, ops = bdev->bd_disk->fops->pr_ops; if (ops && ops->pr_read_reservation) - r = ops->pr_read_reservation(bdev, rsv); + r = ops->pr_read_reservation(bdev, rsv, blk_stat); else r = -EOPNOTSUPP; out: diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index 87a0aaf811f4..854a26ce55fe 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -86,7 +86,7 @@ static int nvme_pr_command(struct block_device *bdev, u32 cdw10, } static int nvme_pr_register(struct block_device *bdev, u64 old, - u64 new, unsigned flags) + u64 new, unsigned flags, blk_status_t *blk_stat) { u32 cdw10; @@ -100,7 +100,7 @@ static int nvme_pr_register(struct block_device *bdev, u64 old, } static int nvme_pr_reserve(struct block_device *bdev, u64 key, - enum pr_type type, unsigned flags) + enum pr_type type, unsigned flags, blk_status_t *blk_stat) { u32 cdw10; @@ -113,21 +113,23 @@ 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) + enum pr_type type, bool abort, blk_status_t *blk_stat) { u32 cdw10 = nvme_pr_type_from_blk(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) +static int nvme_pr_clear(struct block_device *bdev, u64 key, + blk_status_t *blk_stat) { 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) +static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type, + blk_status_t *blk_stat) { u32 cdw10 = nvme_pr_type_from_blk(type) << 8 | (key ? 0 : 1 << 3); @@ -163,7 +165,7 @@ static int nvme_pr_resv_report(struct block_device *bdev, u8 *data, } static int nvme_pr_read_keys(struct block_device *bdev, - struct pr_keys *keys_info, u32 keys_len) + struct pr_keys *keys_info, u32 keys_len, blk_status_t *blk_stat) { struct nvme_reservation_status *status; u32 data_len, num_ret_keys; @@ -207,7 +209,7 @@ static int nvme_pr_read_keys(struct block_device *bdev, } static int nvme_pr_read_reservation(struct block_device *bdev, - struct pr_held_reservation *resv) + struct pr_held_reservation *resv, blk_status_t *blk_stat) { struct nvme_reservation_status tmp_status, *status; int ret, i, num_regs; diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 86b602399000..8a39f25e4470 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1736,7 +1736,7 @@ static int sd_pr_in_command(struct block_device *bdev, u8 sa, } static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info, - u32 keys_len) + u32 keys_len, blk_status_t *blk_stat) { int result, i, data_offset, num_copy_keys; int data_len = keys_len + 8; @@ -1767,7 +1767,8 @@ static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info, } static int sd_pr_read_reservation(struct block_device *bdev, - struct pr_held_reservation *rsv) + struct pr_held_reservation *rsv, + blk_status_t *blk_stat) { struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); struct scsi_device *sdev = sdkp->device; @@ -1797,8 +1798,8 @@ static int sd_pr_read_reservation(struct block_device *bdev, 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) +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; @@ -1847,7 +1848,7 @@ static int sd_pr_out_command(struct block_device *bdev, u8 sa, } static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, - u32 flags) + u32 flags, blk_status_t *blk_stat) { if (flags & ~PR_FL_IGNORE_KEY) return -EOPNOTSUPP; @@ -1857,7 +1858,7 @@ static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, } static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, - u32 flags) + u32 flags, blk_status_t *blk_stat) { if (flags) return -EOPNOTSUPP; @@ -1865,20 +1866,22 @@ static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, block_pr_type_to_scsi(type), 0); } -static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type) +static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type, + blk_status_t *blk_stat) { 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) + enum pr_type type, bool abort, blk_status_t *blk_stat) { return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, block_pr_type_to_scsi(type), 0); } -static int sd_pr_clear(struct block_device *bdev, u64 key) +static int sd_pr_clear(struct block_device *bdev, u64 key, + blk_status_t *blk_stat) { return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0); } diff --git a/fs/nfs/blocklayout/dev.c b/fs/nfs/blocklayout/dev.c index fea5f8821da5..516436446f5d 100644 --- a/fs/nfs/blocklayout/dev.c +++ b/fs/nfs/blocklayout/dev.c @@ -29,7 +29,7 @@ bl_free_device(struct pnfs_block_dev *dev) int error; error = ops->pr_register(dev->bdev, dev->pr_key, 0, - false); + false, NULL); if (error) pr_err("failed to unregister PR key.\n"); } @@ -362,7 +362,7 @@ bl_parse_scsi(struct nfs_server *server, struct pnfs_block_dev *d, goto out_blkdev_put; } - error = ops->pr_register(d->bdev, 0, d->pr_key, true); + error = ops->pr_register(d->bdev, 0, d->pr_key, true, NULL); if (error) { pr_err("pNFS: failed to register key for block device %s.", d->bdev->bd_disk->disk_name); diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c index b6d01d51a746..a302ea026f72 100644 --- a/fs/nfsd/blocklayout.c +++ b/fs/nfsd/blocklayout.c @@ -277,7 +277,7 @@ nfsd4_block_get_device_info_scsi(struct super_block *sb, goto out_free_dev; } - ret = ops->pr_register(sb->s_bdev, 0, NFSD_MDS_PR_KEY, true); + ret = ops->pr_register(sb->s_bdev, 0, NFSD_MDS_PR_KEY, true, NULL); if (ret) { pr_err("pNFS: failed to register key for device %s.\n", sb->s_id); @@ -285,7 +285,7 @@ nfsd4_block_get_device_info_scsi(struct super_block *sb, } ret = ops->pr_reserve(sb->s_bdev, NFSD_MDS_PR_KEY, - PR_EXCLUSIVE_ACCESS_REG_ONLY, 0); + PR_EXCLUSIVE_ACCESS_REG_ONLY, 0, NULL); if (ret) { pr_err("pNFS: failed to reserve device %s.\n", sb->s_id); @@ -331,7 +331,7 @@ nfsd4_scsi_fence_client(struct nfs4_layout_stateid *ls) struct block_device *bdev = ls->ls_file->nf_file->f_path.mnt->mnt_sb->s_bdev; bdev->bd_disk->fops->pr_ops->pr_preempt(bdev, NFSD_MDS_PR_KEY, - nfsd4_scsi_pr_key(clp), 0, true); + nfsd4_scsi_pr_key(clp), 0, true, NULL); } const struct nfsd4_layout_ops scsi_layout_ops = { diff --git a/include/linux/pr.h b/include/linux/pr.h index 55c9ab7a202b..954544200a57 100644 --- a/include/linux/pr.h +++ b/include/linux/pr.h @@ -18,14 +18,15 @@ struct pr_held_reservation { struct pr_ops { int (*pr_register)(struct block_device *bdev, u64 old_key, u64 new_key, - u32 flags); + u32 flags, blk_status_t *blk_stat); int (*pr_reserve)(struct block_device *bdev, u64 key, - enum pr_type type, u32 flags); + enum pr_type type, u32 flags, blk_status_t *blk_stat); int (*pr_release)(struct block_device *bdev, u64 key, - enum pr_type type); + enum pr_type type, blk_status_t *blk_stat); 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); + enum pr_type type, bool abort, blk_status_t *blk_stat); + int (*pr_clear)(struct block_device *bdev, u64 key, + blk_status_t *blk_stat); /* * 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 @@ -35,9 +36,11 @@ struct pr_ops { * contains, so the caller can retry with a larger array. */ int (*pr_read_keys)(struct block_device *bdev, - struct pr_keys *keys_info, u32 keys_len); + struct pr_keys *keys_info, u32 keys_len, + blk_status_t *blk_stat); int (*pr_read_reservation)(struct block_device *bdev, - struct pr_held_reservation *rsv); + struct pr_held_reservation *rsv, + blk_status_t *blk_stat); }; #endif /* LINUX_PR_H */ From patchwork Wed Oct 26 23:19:39 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619445 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 C224CFA373D for ; Wed, 26 Oct 2022 23:25:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233663AbiJZXZR (ORCPT ); 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To do this it has to know the device/driver type so it can convert the return code because that's currently a NVMe specific value. Instead of having the upper layers figure out the device/driver type and call a NVMe conversion function this has NVMe do the conversion and return a blk_status_t which the upper layer knows how to handle. Signed-off-by: Mike Christie --- drivers/nvme/host/core.c | 2 +- drivers/nvme/host/nvme.h | 1 + drivers/nvme/host/pr.c | 54 ++++++++++++++++++++++++++-------------- 3 files changed, 38 insertions(+), 19 deletions(-) diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 2de9c42094a6..1fd152a90ed4 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -248,7 +248,7 @@ static void nvme_delete_ctrl_sync(struct nvme_ctrl *ctrl) nvme_put_ctrl(ctrl); } -static blk_status_t nvme_error_status(u16 status) +blk_status_t nvme_error_status(u16 status) { switch (status & 0x7ff) { case NVME_SC_SUCCESS: diff --git a/drivers/nvme/host/nvme.h b/drivers/nvme/host/nvme.h index e82be1f1373d..d60da2b8c1c6 100644 --- a/drivers/nvme/host/nvme.h +++ b/drivers/nvme/host/nvme.h @@ -855,6 +855,7 @@ int nvme_ns_head_chr_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); int nvme_getgeo(struct block_device *bdev, struct hd_geometry *geo); int nvme_dev_uring_cmd(struct io_uring_cmd *ioucmd, unsigned int issue_flags); +blk_status_t nvme_error_status(u16 status); extern const struct attribute_group *nvme_ns_id_attr_groups[]; extern const struct pr_ops nvme_pr_ops; diff --git a/drivers/nvme/host/pr.c b/drivers/nvme/host/pr.c index 854a26ce55fe..818955c570e3 100644 --- a/drivers/nvme/host/pr.c +++ b/drivers/nvme/host/pr.c @@ -43,7 +43,8 @@ static enum pr_type block_pr_type_from_nvme(enum nvme_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, u8 *data, unsigned int data_len, + blk_status_t *blk_stat) { struct nvme_ns_head *head = bdev->bd_disk->private_data; int srcu_idx = srcu_read_lock(&head->srcu); @@ -53,20 +54,28 @@ 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, data_len); + if (blk_stat && ret >= 0) + *blk_stat = nvme_error_status(ret); } 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) + u8 *data, unsigned int data_len, blk_status_t *blk_stat) { + int ret; + c->common.nsid = cpu_to_le32(ns->head->ns_id); - return nvme_submit_sync_cmd(ns->queue, c, data, data_len); + ret = nvme_submit_sync_cmd(ns->queue, c, data, data_len); + if (blk_stat && ret >= 0) + *blk_stat = nvme_error_status(ret); + return ret; } static int nvme_pr_command(struct block_device *bdev, u32 cdw10, - u64 key, u64 sa_key, u8 op) + u64 key, u64 sa_key, u8 op, + blk_status_t *blk_stat) { struct nvme_command c = { }; u8 data[16] = { 0, }; @@ -80,9 +89,9 @@ 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) return nvme_send_ns_head_pr_command(bdev, &c, data, - sizeof(data)); - return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, data, - sizeof(data)); + sizeof(data), blk_stat); + return nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, + data, sizeof(data), blk_stat); } static int nvme_pr_register(struct block_device *bdev, u64 old, @@ -96,7 +105,8 @@ static int nvme_pr_register(struct block_device *bdev, u64 old, 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); + return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_register, + blk_stat); } static int nvme_pr_reserve(struct block_device *bdev, u64 key, @@ -109,7 +119,8 @@ static int nvme_pr_reserve(struct block_device *bdev, u64 key, 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); + return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_acquire, + blk_stat); } static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, @@ -117,7 +128,8 @@ static int nvme_pr_preempt(struct block_device *bdev, u64 old, u64 new, { u32 cdw10 = nvme_pr_type_from_blk(type) << 8 | (abort ? 2 : 1); - return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire); + return nvme_pr_command(bdev, cdw10, old, new, nvme_cmd_resv_acquire, + blk_stat); } static int nvme_pr_clear(struct block_device *bdev, u64 key, @@ -125,7 +137,8 @@ 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); + return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release, + blk_stat); } static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type, @@ -133,11 +146,12 @@ static int nvme_pr_release(struct block_device *bdev, u64 key, enum pr_type type { 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); + return nvme_pr_command(bdev, cdw10, key, 0, nvme_cmd_resv_release, + blk_stat); } static int nvme_pr_resv_report(struct block_device *bdev, u8 *data, - u32 data_len, bool *eds) + u32 data_len, bool *eds, blk_status_t *blk_stat) { struct nvme_command c = { }; int ret; @@ -148,12 +162,16 @@ static int nvme_pr_resv_report(struct block_device *bdev, u8 *data, *eds = true; retry: + if (blk_stat) + *blk_stat = 0; + if (IS_ENABLED(CONFIG_NVME_MULTIPATH) && bdev->bd_disk->fops == &nvme_ns_head_ops) - ret = nvme_send_ns_head_pr_command(bdev, &c, data, data_len); + ret = nvme_send_ns_head_pr_command(bdev, &c, data, data_len, + blk_stat); else ret = nvme_send_ns_pr_command(bdev->bd_disk->private_data, &c, - data, data_len); + data, data_len, blk_stat); if (ret == NVME_SC_HOST_ID_INCONSIST && c.common.cdw11 == NVME_EXTENDED_DATA_STRUCT) { c.common.cdw11 = 0; @@ -184,7 +202,7 @@ static int nvme_pr_read_keys(struct block_device *bdev, if (!data) return -ENOMEM; - ret = nvme_pr_resv_report(bdev, data, data_len, &eds); + ret = nvme_pr_resv_report(bdev, data, data_len, &eds, blk_stat); if (ret) goto free_data; @@ -224,7 +242,7 @@ static int nvme_pr_read_reservation(struct block_device *bdev, * the response buffer. */ ret = nvme_pr_resv_report(bdev, (u8 *)&tmp_status, sizeof(tmp_status), - &eds); + &eds, blk_stat); if (ret) return 0; @@ -240,7 +258,7 @@ static int nvme_pr_read_reservation(struct block_device *bdev, if (!data) return -ENOMEM; - ret = nvme_pr_resv_report(bdev, data, data_len, &eds); + ret = nvme_pr_resv_report(bdev, data, data_len, &eds, blk_stat); if (ret) goto free_data; status = (struct nvme_reservation_status *)data; From patchwork Wed Oct 26 23:19:40 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619441 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 95A38C433FE for ; Wed, 26 Oct 2022 23:25:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234495AbiJZXZw (ORCPT ); Wed, 26 Oct 2022 19:25:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46366 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234350AbiJZXY4 (ORCPT ); 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Signed-off-by: Mike Christie --- drivers/scsi/scsi_lib.c | 3 ++- include/scsi/scsi_cmnd.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index f19bc3a7ef59..9367c900f093 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -578,7 +578,7 @@ static inline u8 get_scsi_ml_byte(int result) * * Translate a SCSI result code into a blk_status_t value. */ -static blk_status_t scsi_result_to_blk_status(int result) +blk_status_t scsi_result_to_blk_status(int result) { /* * Check the scsi-ml byte first in case we converted a host or status @@ -609,6 +609,7 @@ static blk_status_t scsi_result_to_blk_status(int result) return BLK_STS_IOERR; } } +EXPORT_SYMBOL_GPL(scsi_result_to_blk_status); /** * scsi_rq_err_bytes - determine number of bytes till the next failure boundary diff --git a/include/scsi/scsi_cmnd.h b/include/scsi/scsi_cmnd.h index ba629ac4525f..2ef3b92e901f 100644 --- a/include/scsi/scsi_cmnd.h +++ b/include/scsi/scsi_cmnd.h @@ -174,6 +174,7 @@ static inline void *scsi_cmd_priv(struct scsi_cmnd *cmd) void scsi_done(struct scsi_cmnd *cmd); void scsi_done_direct(struct scsi_cmnd *cmd); +blk_status_t scsi_result_to_blk_status(int result); extern void scsi_finish_command(struct scsi_cmnd *cmd); extern void *scsi_kmap_atomic_sg(struct scatterlist *sg, int sg_count, From patchwork Wed Oct 26 23:19:41 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619132 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 A9980FA3744 for ; Wed, 26 Oct 2022 23:25:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234337AbiJZXZp (ORCPT ); Wed, 26 Oct 2022 19:25:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46540 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234329AbiJZXYy (ORCPT ); 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To do this it has to know the device/driver type so it can convert the return code because that's currently a device/driver specific value. Instead of having the upper layers figure out the device/driver type and call a driver specific conversion function this has SCSI do the conversion and return a blk_status_t which the upper layer knows how to handle. This will handle the reservation conflict and in the future we can handle timeouts, transport errors and sense errors if needed. Signed-off-by: Mike Christie --- drivers/scsi/sd.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index 8a39f25e4470..44d25194ff4e 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -1696,7 +1696,8 @@ static int sd_get_unique_id(struct gendisk *disk, u8 id[16], } static int sd_pr_in_command(struct block_device *bdev, u8 sa, - unsigned char *data, int data_len) + unsigned char *data, int data_len, + blk_status_t *blk_stat) { struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); struct scsi_device *sdev = sdkp->device; @@ -1732,6 +1733,9 @@ static int sd_pr_in_command(struct block_device *bdev, u8 sa, scsi_print_sense_hdr(sdev, NULL, &sshdr); } + if (blk_stat && result >= 0) + *blk_stat = scsi_result_to_blk_status(result); + return result; } @@ -1746,7 +1750,7 @@ static int sd_pr_read_keys(struct block_device *bdev, struct pr_keys *keys_info, if (!data) return -ENOMEM; - result = sd_pr_in_command(bdev, READ_KEYS, data, data_len); + result = sd_pr_in_command(bdev, READ_KEYS, data, data_len, blk_stat); if (result) goto free_data; @@ -1775,7 +1779,8 @@ static int sd_pr_read_reservation(struct block_device *bdev, u8 data[24] = { 0, }; int result, len; - result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data)); + result = sd_pr_in_command(bdev, READ_RESERVATION, data, sizeof(data), + blk_stat); if (result) return result; @@ -1799,7 +1804,8 @@ static int sd_pr_read_reservation(struct block_device *bdev, } static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, - u64 sa_key, enum scsi_pr_type type, u8 flags) + u64 sa_key, enum scsi_pr_type type, u8 flags, + blk_status_t *blk_stat) { struct scsi_disk *sdkp = scsi_disk(bdev->bd_disk); struct scsi_device *sdev = sdkp->device; @@ -1844,6 +1850,9 @@ static int sd_pr_out_command(struct block_device *bdev, u8 sa, u64 key, scsi_print_sense_hdr(sdev, NULL, &sshdr); } + if (blk_stat && result >= 0) + *blk_stat = scsi_result_to_blk_status(result); + return result; } @@ -1854,7 +1863,8 @@ static int sd_pr_register(struct block_device *bdev, u64 old_key, u64 new_key, return -EOPNOTSUPP; return sd_pr_out_command(bdev, (flags & PR_FL_IGNORE_KEY) ? 0x06 : 0x00, old_key, new_key, 0, - (1 << 0) /* APTPL */); + (1 << 0) /* APTPL */, + blk_stat); } static int sd_pr_reserve(struct block_device *bdev, u64 key, enum pr_type type, @@ -1863,27 +1873,27 @@ 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, - block_pr_type_to_scsi(type), 0); + block_pr_type_to_scsi(type), 0, blk_stat); } static int sd_pr_release(struct block_device *bdev, u64 key, enum pr_type type, blk_status_t *blk_stat) { return sd_pr_out_command(bdev, 0x02, key, 0, - block_pr_type_to_scsi(type), 0); + block_pr_type_to_scsi(type), 0, blk_stat); } static int sd_pr_preempt(struct block_device *bdev, u64 old_key, u64 new_key, enum pr_type type, bool abort, blk_status_t *blk_stat) { return sd_pr_out_command(bdev, abort ? 0x05 : 0x04, old_key, new_key, - block_pr_type_to_scsi(type), 0); + block_pr_type_to_scsi(type), 0, blk_stat); } static int sd_pr_clear(struct block_device *bdev, u64 key, blk_status_t *blk_stat) { - return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0); + return sd_pr_out_command(bdev, 0x03, key, 0, 0, 0, blk_stat); } static const struct pr_ops sd_pr_ops = { From patchwork Wed Oct 26 23:19:42 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619133 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 6599BFA373E for ; Wed, 26 Oct 2022 23:25:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234231AbiJZXZg (ORCPT ); Wed, 26 Oct 2022 19:25:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234258AbiJZXYx (ORCPT ); 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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 +++++++------ include/target/target_core_backend.h | 4 ++-- 5 files changed, 15 insertions(+), 14 deletions(-) diff --git a/drivers/target/target_core_file.c b/drivers/target/target_core_file.c index 28aa643be5d5..8336c0e0b1db 100644 --- a/drivers/target/target_core_file.c +++ b/drivers/target/target_core_file.c @@ -903,7 +903,7 @@ 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, @@ -913,7 +913,7 @@ 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 8351c974cee3..5db7318b4822 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -878,7 +878,7 @@ 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, @@ -888,7 +888,7 @@ 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 1e3216de1e04..74133efda529 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; @@ -279,7 +279,8 @@ static inline unsigned long long transport_lba_64_ext(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; @@ -348,7 +349,7 @@ 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); @@ -564,7 +565,7 @@ 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; @@ -762,7 +763,7 @@ 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; @@ -1074,7 +1075,7 @@ 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/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 *); 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bh=TZk6ghsPowBpUzDbo1ylVpomuPUCb5oWOrKm7/jKlyw=; b=F3mnNXlmz+UATLXHVOb5NA1wn7VER9kQVdw01UIVHgaIoRzyiqPGt4Z02aCrAZs0SUtxGTV95CEl+ewr4CNCcOAvoqq+Hv8hz3/abG5VotUc/QIUrZWxoMIm6pguRSkDuQ4alP+XPBBQqwxFfkRC+1Tl9gONoC7XIlALl5JTUbk= Received: from DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) by MW5PR10MB5690.namprd10.prod.outlook.com (2603:10b6:303:19b::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5746.27; Wed, 26 Oct 2022 23:20:13 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df%7]) with mapi id 15.20.5746.028; Wed, 26 Oct 2022 23:20:13 +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 v3 17/19] scsi: target: Allow backends to hook into PR handling Date: Wed, 26 Oct 2022 18:19:43 -0500 Message-Id: <20221026231945.6609-18-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH2PR18CA0056.namprd18.prod.outlook.com (2603:10b6:610:55::36) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|MW5PR10MB5690:EE_ X-MS-Office365-Filtering-Correlation-Id: f8e73db1-0960-4c91-aee7-08dab7a8a26f X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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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 | 60 ++++++++++++++++++++++++++++ include/target/target_core_backend.h | 5 +++ 2 files changed, 65 insertions(+) diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index a1d67554709f..ac85f2b87c4d 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -3519,6 +3519,26 @@ 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, all_tg_pt, spec_i_pt); +} + /* * See spc4r17 section 6.14 Table 170 */ @@ -3622,6 +3642,12 @@ 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: @@ -3663,6 +3689,7 @@ 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; @@ -4020,6 +4047,33 @@ 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) +{ + 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, cmd->t_task_cdb[1] & 0x1f, buf); + + transport_kunmap_data_sg(cmd); + return ret; +} + sense_reason_t target_scsi3_emulate_pr_in(struct se_cmd *cmd) { @@ -4041,6 +4095,11 @@ target_scsi3_emulate_pr_in(struct se_cmd *cmd) return TCM_RESERVATION_CONFLICT; } + if (cmd->se_dev->transport_flags & TRANSPORT_FLAG_PASSTHROUGH_PGR) { + ret = target_try_pr_in_pt(cmd); + goto done; + } + switch (cmd->t_task_cdb[1] & 0x1f) { case PRI_READ_KEYS: ret = core_scsi3_pri_read_keys(cmd); @@ -4060,6 +4119,7 @@ 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..84bfdfb14997 100644 --- a/include/target/target_core_backend.h +++ b/include/target/target_core_backend.h @@ -69,6 +69,11 @@ 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, + bool all_tg_pt, bool spec_i_pt); + 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 Wed Oct 26 23:19:44 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619443 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 8E269FA3746 for ; Wed, 26 Oct 2022 23:25:48 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234387AbiJZXZr (ORCPT ); Wed, 26 Oct 2022 19:25:47 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234313AbiJZXYy (ORCPT ); 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Signed-off-by: Mike Christie --- drivers/target/target_core_spc.c | 25 +++++++++++++++++++------ 1 file changed, 19 insertions(+), 6 deletions(-) diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index 7cca3b15472b..fb5febc437a0 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -1320,12 +1320,25 @@ 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; + /* + * The block layer pr_ops don't support the old RESERVE/RELEASE + * commands. + */ + 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 Wed Oct 26 23:19:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 619442 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 9F897FA3748 for ; Wed, 26 Oct 2022 23:25:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234484AbiJZXZt (ORCPT ); Wed, 26 Oct 2022 19:25:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46368 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234334AbiJZXYz (ORCPT ); Wed, 26 Oct 2022 19:24:55 -0400 Received: from mx0a-00069f02.pphosted.com (mx0a-00069f02.pphosted.com [205.220.165.32]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B791B2673; 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bh=d5oQSur8BTrplxXSck4cG2lE6brWmJiDfbs3jfF9Wtw=; b=TVd/F4tEVuWaaXiG/exttnUpn9PY4VqSBFl6+hSjYv2G1jBw3731y1ruW0/YH6AnjlH0cyOKKJTMPlmZQ6c4bVZ2kBRJiI5FKCqS4bzg4rCZO64UXi9Mwvv5bA0nzUUdNj2MqJqjk4mudovmXnvMX50YBjkGuOwiv4bbhDCo3uo= Received: from DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) by MW5PR10MB5690.namprd10.prod.outlook.com (2603:10b6:303:19b::8) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.5746.27; Wed, 26 Oct 2022 23:20:17 +0000 Received: from DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df]) by DM5PR10MB1466.namprd10.prod.outlook.com ([fe80::19f7:e081:85b4:c5df%7]) with mapi id 15.20.5746.028; Wed, 26 Oct 2022 23:20:16 +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 v3 19/19] scsi: target: Add block PR support to iblock Date: Wed, 26 Oct 2022 18:19:45 -0500 Message-Id: <20221026231945.6609-20-michael.christie@oracle.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20221026231945.6609-1-michael.christie@oracle.com> References: <20221026231945.6609-1-michael.christie@oracle.com> X-ClientProxiedBy: CH2PR15CA0009.namprd15.prod.outlook.com (2603:10b6:610:51::19) To DM5PR10MB1466.namprd10.prod.outlook.com (2603:10b6:3:b::7) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM5PR10MB1466:EE_|MW5PR10MB5690:EE_ X-MS-Office365-Filtering-Correlation-Id: e34ea19a-8fca-49d0-1712-08dab7a8a469 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 | 292 +++++++++++++++++++++++++++- 1 file changed, 287 insertions(+), 5 deletions(-) diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c index 5db7318b4822..caf6958dd75d 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 unsigned long long iblock_emulate_read_cap_with_block_size( 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_NEXUS) + 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 +835,279 @@ 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, + bool all_tg_pt, bool spec_i_pt) +{ + 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; + blk_status_t blk_stat = 0; + 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_AND_MOVE: + pr_err("PRO_REGISTER_AND_MOVE is not supported by iblock PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + case PRO_REPLACE_LOST_RESERVATION: + pr_err("PRO_REPLACE_LOST_RESERVATION is not supported by iblock PR passthrough.\n"); + return TCM_UNSUPPORTED_SCSI_OPCODE; + 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; + } + + /* + * We only support one target port. We don't know the target + * port config at this level and the block layer has a + * different view. + */ + 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; + } + + /* 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, + &blk_stat); + 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, + &blk_stat); + 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, &blk_stat); + 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, + &blk_stat); + 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), + &blk_stat); + 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 (blk_stat == BLK_STS_NEXUS) + 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; + + ret = ops->pr_read_keys(bdev, keys, len, NULL); + 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, NULL)) + 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; + case PRI_READ_FULL_STATUS: + default: + pr_err("Unknown PERSISTENT_RESERVE_IN SA: 0x%02x\n", sa); + return TCM_UNSUPPORTED_SCSI_OPCODE; + } + + return ret; +} + static sector_t iblock_get_blocks(struct se_device *dev) { struct iblock_dev *ib_dev = IBLOCK_DEV(dev); @@ -883,6 +1162,8 @@ 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 @@ -899,6 +1180,7 @@ 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,