From patchwork Mon Nov 29 09:00:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dmitry Bogdanov X-Patchwork-Id: 12935715 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 C5845C19F2C for ; Wed, 3 Aug 2022 16:31:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238530AbiHCQbt (ORCPT ); Wed, 3 Aug 2022 12:31:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50986 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238455AbiHCQaY (ORCPT ); Wed, 3 Aug 2022 12:30:24 -0400 Received: from mta-01.yadro.com (mta-02.yadro.com [89.207.88.252]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3405A4D4C2; Wed, 3 Aug 2022 09:30:03 -0700 (PDT) Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 9EA7B412F7; Wed, 3 Aug 2022 16:30:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received:received; s= mta-01; t=1659544199; x=1661358600; bh=7RN/zxZr+Ny4BQZWDFA8hJi+M a8n+gx9BFIwRKD77sU=; b=hONNWuWrG0oZD8oVwh0p09z+fzezas0wM8ojUrQvY uJQWPS9iLRBezVvZ8dTIbFgigiK0J2LPgpEd1NgVak4bs2IQehH19V1uH5cggu2y lAGxAzcrGQ6MAIpC7/aaX3jMXQVyrh0HP+aGFj5I1sDJh489HGyXZgZmUZRxbOCH eA= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id hN1wkk2GzYSa; Wed, 3 Aug 2022 19:29:59 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 368EA412CC; Wed, 3 Aug 2022 19:29:23 +0300 (MSK) Received: from T-EXCH-08.corp.yadro.com (172.17.11.58) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Wed, 3 Aug 2022 19:29:23 +0300 Received: from NB-591.corp.yadro.com (10.199.18.20) by T-EXCH-08.corp.yadro.com (172.17.11.58) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.1118.9; Wed, 3 Aug 2022 19:29:22 +0300 From: Dmitry Bogdanov To: Martin Petersen , CC: , , Dmitry Bogdanov Subject: [RFC PATCH 38/48] target: cluster: store PR data in DLM cluster Date: Mon, 29 Nov 2021 12:00:46 +0300 Message-ID: <20220803162857.27770-39-d.bogdanov@yadro.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220803162857.27770-1-d.bogdanov@yadro.com> References: <20220803162857.27770-1-d.bogdanov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [10.199.18.20] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-08.corp.yadro.com (172.17.11.58) Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Follow the sequence bellow to sync all PR data throughout nodes in cluster: pr_lock() Handle PR OUT locally if (success) pr_sync() pr_unlock() where pr_sync() is a synchronical function. That will garantee an atomic update of PR data in a cluster. Signed-off-by: Dmitry Bogdanov --- drivers/target/target_cluster_dlm.c | 247 +++++++++++++++++++++++- drivers/target/target_core_device.c | 8 + drivers/target/target_core_fabric_lib.c | 1 + drivers/target/target_core_internal.h | 2 - drivers/target/target_core_pr.c | 7 + include/target/target_core_base.h | 6 + 6 files changed, 268 insertions(+), 3 deletions(-) diff --git a/drivers/target/target_cluster_dlm.c b/drivers/target/target_cluster_dlm.c index 2edae188811d..14465764eaaf 100644 --- a/drivers/target/target_cluster_dlm.c +++ b/drivers/target/target_cluster_dlm.c @@ -5,12 +5,21 @@ #include #include #include +#include +#include +#include "target_core_pr.h" #include "dlm_ckv.h" struct target_cluster_data { struct dlm_ckv_bucket *bucket; u32 local_nodeid; + struct mutex pr_lock_mutex; + struct dlm_ckv_lock *pr_lock; + struct dlm_ckv_kv *pr_data; + int reserved_node_id; + struct dlm_ckv_kv **pr_reg_kv; + size_t pr_reg_kv_len; }; struct target_lksb { @@ -60,6 +69,44 @@ static const struct config_item_type ci_cluster_config = { }; static struct target_cluster_config cluster_cfg; +struct pr_lvb { + u32 nr_registrants; + u32 pr_generation; + u8 version; + u8 pr_is_set; + u8 pr_type; + u8 pr_scope; + u8 pr_aptpl; + u8 reserved[3]; + u32 reserved_by_nodeid; +}; + +struct pr_reg_lvb { + u64 key; + u16 rtpi; + u8 version; + u8 is_holder; + u8 is_all_tg_pt; + u8 tid[PR_REG_TID_LEN]; +} __packed ; /* to fit in 256 bytes */ + +struct async_group { + refcount_t pending; + atomic_t status; + struct completion compl; +}; + +static int pr_reg_realloc(struct target_cluster_data *cluster_data, + size_t nr_registrants); + +static void group_compl_cb(void *arg, int res) +{ + struct async_group *grp = arg; + + atomic_cmpxchg(&grp->status, 0, res); + if (refcount_dec_and_test(&grp->pending)) + complete(&grp->compl); +} static int target_init_dlm(struct se_device *dev) { @@ -68,6 +115,7 @@ static int target_init_dlm(struct se_device *dev) int err = 0; BUG_ON(dev->cluster_data); + BUILD_BUG_ON(sizeof(struct pr_reg_lvb) > DLM_CKV_VALUE_MAX_SIZE); snprintf(ls_name, sizeof(ls_name), "%s%s", dev->t10_wwn.model, dev->t10_wwn.unit_serial); @@ -85,16 +133,42 @@ static int target_init_dlm(struct se_device *dev) dev->cluster_data = NULL; return err; } + + mutex_init(&cluster_data->pr_lock_mutex); + cluster_data->pr_lock = dlm_ckv_create_lock(cluster_data->bucket, "pr_lock"); + if (!cluster_data->pr_lock) + goto fail; + + cluster_data->pr_data = dlm_ckv_create_kv(cluster_data->bucket, "pr_data"); + if (!cluster_data->pr_data) + goto fail; + dev->cluster_data = cluster_data; return err; +fail: + if (cluster_data->pr_lock) + dlm_ckv_free_lock(cluster_data->pr_lock); + if (cluster_data->pr_data) + dlm_ckv_free_kv(cluster_data->pr_data); + dlm_ckv_close_bucket(cluster_data->bucket); + kfree(cluster_data); + return -EIO; } static int target_cleanup_dlm(struct se_device *dev) { struct target_cluster_data *cluster_data = dev->cluster_data; int res; + int i; + + for (i = 0; i < cluster_data->pr_reg_kv_len; i++) + if (cluster_data->pr_reg_kv[i]) + dlm_ckv_free_kv(cluster_data->pr_reg_kv[i]); + kfree(cluster_data->pr_reg_kv); + dlm_ckv_free_lock(cluster_data->pr_lock); + dlm_ckv_free_kv(cluster_data->pr_data); res = dlm_ckv_close_bucket(cluster_data->bucket); if (res) pr_err("TARGET_CORE[%d]: closing bucket failed: %d\n", @@ -142,7 +216,175 @@ static int target_caw_unlock_dlm(struct se_device *dev, void *lock) return res; } -struct target_cluster_ops dlm_cluster_ops = { +static int target_pr_lock_dlm(struct se_device *dev) +{ + struct target_cluster_data *cluster_data = dev->cluster_data; + int res = -ENOMEM; + + mutex_lock(&cluster_data->pr_lock_mutex); + res = dlm_ckv_lock_get(cluster_data->pr_lock); + if (res) { + pr_warn("target_dlm_lock_wait failed with %d\n", res); + mutex_unlock(&cluster_data->pr_lock_mutex); + } + + return res; +} + +static int target_pr_unlock_dlm(struct se_device *dev) +{ + struct target_cluster_data *cluster_data = dev->cluster_data; + int res; + + res = dlm_ckv_lock_release(cluster_data->pr_lock); + mutex_unlock(&cluster_data->pr_lock_mutex); + + return res; +} + +static int target_get_nr_registrants(struct se_device *dev) +{ + struct t10_pr_registration *pr_reg; + int count = 0; + + list_for_each_entry(pr_reg, + &dev->t10_pr.registration_list, pr_reg_list) + count++; + + return count; +} + +static int pr_reg_realloc(struct target_cluster_data *cluster_data, + size_t nr_registrants) +{ + char key_name[16]; + void *p; + int res = 0; + int i; + + if (nr_registrants > cluster_data->pr_reg_kv_len) { + p = krealloc(cluster_data->pr_reg_kv, + nr_registrants * sizeof(struct dlm_ckv_kv *), + GFP_KERNEL | __GFP_ZERO); + if (!p) { + res = -ENOMEM; + goto done; + } + cluster_data->pr_reg_kv = p; + for (i = cluster_data->pr_reg_kv_len; + i < nr_registrants; i++) { + snprintf(key_name, sizeof(key_name), "pr_reg.%d", i); + if (!cluster_data->pr_reg_kv[i]) + cluster_data->pr_reg_kv[i] = dlm_ckv_create_kv( + cluster_data->bucket, + key_name); + if (!cluster_data->pr_reg_kv[i]) { + res = -ENOMEM; + goto fail_create; + } + } + cluster_data->pr_reg_kv_len = nr_registrants; + } +done: + return res; +fail_create: + /* free newly created objects */ + for (i = cluster_data->pr_reg_kv_len; + i < nr_registrants; i++) { + if (!cluster_data->pr_reg_kv[i]) + dlm_ckv_free_kv(cluster_data->pr_reg_kv[i]); + } + return res; +} + +static int target_pr_sync_dlm(struct se_device *dev) +{ + struct target_cluster_data *cluster_data = dev->cluster_data; + struct t10_pr_registration *pr_reg; + struct pr_reg_lvb pr_reg_data; + struct async_group grp; + struct pr_lvb pr_data; + int i = 0; + int res; + + spin_lock(&dev->t10_pr.registration_lock); + + pr_data.version = 1; + pr_data.pr_generation = atomic_read(&dev->t10_pr.pr_generation); + pr_data.nr_registrants = target_get_nr_registrants(dev); + pr_data.pr_is_set = !!dev->dev_pr_res_holder; + pr_data.pr_aptpl = dev->t10_pr.pr_aptpl_active; + if (dev->dev_pr_res_holder) { + pr_data.pr_type = dev->dev_pr_res_holder->pr_res_type; + pr_data.pr_scope = dev->dev_pr_res_holder->pr_res_scope; + } + pr_data.reserved_by_nodeid = cluster_data->reserved_node_id; + + spin_unlock(&dev->t10_pr.registration_lock); + + res = dlm_ckv_set(cluster_data->pr_data, (char *)&pr_data, + sizeof(pr_data)); + if (res) + goto done; + + + res = pr_reg_realloc(cluster_data, pr_data.nr_registrants); + if (res) + goto done; + + if (pr_data.nr_registrants == 0) + goto skip_pr_reg; + + refcount_set(&grp.pending, 1); /* 1 for a loop */ + atomic_set(&grp.status, 0); + init_completion(&grp.compl); + + list_for_each_entry(pr_reg, + &dev->t10_pr.registration_list, pr_reg_list) { + + pr_reg_data.key = pr_reg->pr_res_key; + pr_reg_data.rtpi = pr_reg->tg_pt_sep_rtpi; + pr_reg_data.version = 1; + pr_reg_data.is_holder = pr_reg->pr_res_holder; + pr_reg_data.is_all_tg_pt = !!pr_reg->pr_reg_all_tg_pt; + target_get_pr_transport_id(pr_reg, pr_reg_data.tid); + + refcount_inc(&grp.pending); + res = dlm_ckv_set_async(cluster_data->pr_reg_kv[i], + (char *)&pr_reg_data, + sizeof(pr_reg_data), + group_compl_cb, + &grp); + if (res) { + pr_err("TARGET_CORE[%d]: set pr_reg_%d failed: %d\n", + dev->dev_index, i, res); + refcount_dec(&grp.pending); + break; + } + i++; + } + group_compl_cb(&grp, 0); + res = wait_for_completion_timeout(&grp.compl, 60 * HZ); + if (!res) { + pr_err("TARGET_CORE[%d]: timeout of waiting for dlm_ckv_set_async\n", + dev->dev_index); + goto done; + } + res = atomic_read(&grp.status); + if (res) { + pr_err("TARGET_CORE[%d]: fail of group for dlm_ckv_set_async %d\n", + dev->dev_index, res); + goto done; + } + +skip_pr_reg: + +done: + + return res; +} + +const struct target_cluster_ops dlm_cluster_ops = { .name = "dlm", .owner = THIS_MODULE, .cg_group = &cluster_cfg.cg_group, @@ -151,6 +393,9 @@ struct target_cluster_ops dlm_cluster_ops = { .cleanup = target_cleanup_dlm, .caw_lock = target_caw_lock_dlm, .caw_unlock = target_caw_unlock_dlm, + .pr_lock = target_pr_lock_dlm, + .pr_unlock = target_pr_unlock_dlm, + .pr_sync = target_pr_sync_dlm, }; static int __init target_cluster_dlm_module_init(void) diff --git a/drivers/target/target_core_device.c b/drivers/target/target_core_device.c index 9c7f4dc1b85d..f5da3fc17ad1 100644 --- a/drivers/target/target_core_device.c +++ b/drivers/target/target_core_device.c @@ -782,6 +782,11 @@ static int target_caw_unlock_nodlm(struct se_device *dev, void *lock) return 0; } +int target_dummy_nodlm(struct se_device *dev) +{ + return 0; +} + const struct target_cluster_ops nodlm_cluster_ops = { .name = "single", .owner = NULL, @@ -789,6 +794,9 @@ const struct target_cluster_ops nodlm_cluster_ops = { .cleanup = target_cleanup_nodlm, .caw_lock = target_caw_lock_nodlm, .caw_unlock = target_caw_unlock_nodlm, + .pr_lock = target_dummy_nodlm, + .pr_unlock = target_dummy_nodlm, + .pr_sync = target_dummy_nodlm, }; struct se_device *target_alloc_device(struct se_hba *hba, const char *name) diff --git a/drivers/target/target_core_fabric_lib.c b/drivers/target/target_core_fabric_lib.c index 0eb03d7b9e78..8232d872db35 100644 --- a/drivers/target/target_core_fabric_lib.c +++ b/drivers/target/target_core_fabric_lib.c @@ -382,6 +382,7 @@ int target_get_pr_transport_id( return len; } +EXPORT_SYMBOL(target_get_pr_transport_id); int target_cmp_pr_transport_id( struct t10_pr_registration *pr_reg, diff --git a/drivers/target/target_core_internal.h b/drivers/target/target_core_internal.h index 58261c716776..8669ff6f48e9 100644 --- a/drivers/target/target_core_internal.h +++ b/drivers/target/target_core_internal.h @@ -107,8 +107,6 @@ int target_fabric_setup_cits(struct target_fabric_configfs *); /* target_core_fabric_lib.c */ int target_get_pr_transport_id_len(struct t10_pr_registration *pr_reg); -int target_get_pr_transport_id(struct t10_pr_registration *pr_reg, - unsigned char *buf); int target_cmp_pr_transport_id(struct t10_pr_registration *pr_reg, unsigned char *tid); int target_gen_pr_transport_id(struct t10_pr_registration *pr_reg, diff --git a/drivers/target/target_core_pr.c b/drivers/target/target_core_pr.c index a984987f0a82..a9fe192f5fe4 100644 --- a/drivers/target/target_core_pr.c +++ b/drivers/target/target_core_pr.c @@ -3560,6 +3560,8 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd) return TCM_PARAMETER_LIST_LENGTH_ERROR; } + if (dev->cl_ops->pr_lock(dev)) + return TCM_LOGICAL_UNIT_COMMUNICATION_FAILURE; /* * (core_scsi3_emulate_pro_* function parameters * are defined by spc4r17 Table 174: @@ -3598,9 +3600,14 @@ target_scsi3_emulate_pr_out(struct se_cmd *cmd) default: pr_err("Unknown PERSISTENT_RESERVE_OUT service" " action: 0x%02x\n", sa); + dev->cl_ops->pr_unlock(dev); return TCM_INVALID_CDB_FIELD; } + if (!ret) + dev->cl_ops->pr_sync(dev); + dev->cl_ops->pr_unlock(dev); + if (!ret) target_complete_cmd(cmd, SAM_STAT_GOOD); return ret; diff --git a/include/target/target_core_base.h b/include/target/target_core_base.h index fbeb4777654b..9edf3c1ac204 100644 --- a/include/target/target_core_base.h +++ b/include/target/target_core_base.h @@ -787,6 +787,9 @@ struct target_cluster_ops { int (*cleanup)(struct se_device *dev); void *(*caw_lock)(struct se_device *dev, u64 lba); int (*caw_unlock)(struct se_device *dev, void *lock); + int (*pr_lock)(struct se_device *dev); + int (*pr_unlock)(struct se_device *dev); + int (*pr_sync)(struct se_device *dev); }; struct se_device { @@ -999,4 +1002,7 @@ static inline void target_free_tag(struct se_session *sess, struct se_cmd *cmd) int target_cluster_impl_register(const struct target_cluster_ops *ops); void target_cluster_impl_unregister(const struct target_cluster_ops *ops); +int target_get_pr_transport_id(struct t10_pr_registration *pr_reg, + unsigned char *buf); + #endif /* TARGET_CORE_BASE_H */