From patchwork Fri May 21 10:25:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chandrakanth Patil X-Patchwork-Id: 446139 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, MIME_HEADER_CTYPE_ONLY, SPF_HELO_NONE, SPF_PASS, T_TVD_MIME_NO_HEADERS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 69DC9C43460 for ; Fri, 21 May 2021 10:27:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C517613AE for ; Fri, 21 May 2021 10:27:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233365AbhEUK2p (ORCPT ); Fri, 21 May 2021 06:28:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43282 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232713AbhEUK2P (ORCPT ); Fri, 21 May 2021 06:28:15 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DF5F5C061344 for ; Fri, 21 May 2021 03:26:39 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id t193so13887429pgb.4 for ; Fri, 21 May 2021 03:26:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=waNV9PVJcbTauYUXA29dlti8zAFpgrilSBbhkgG4yEM=; b=OULdCrrBKx5YjtHWJpt6HKVEtUZ86/6XoZ/cWQVng7sfWZbUIl1G0Ad4qGq2ijbOPX DNBUH4fe15AIOaLWLYsDTsqgfCEwl03erloRXrQWZ6x7Xz1l0Ql6O4oEuYkkXge2677k 0/KDW9IyLxHQmMgm/cW95uOikJNaNT0b3FcLU= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=waNV9PVJcbTauYUXA29dlti8zAFpgrilSBbhkgG4yEM=; b=rspbP3PVNaOwlDwlhV6NFPzCKMiVL7JsyFBi00nSBkwZ0JOFoyu9YjN2RpMHTeUFKD ADQQ2eXxTMyiSs31btxqlC6UNxVAkcHDsu3yCaRcZxjHiUZ+A21pbygW+mAAvuRCGOWC tF4/uHfo45kTmF8e11rhwupTEVxN818kK6R6eT7d9p2poPoPqbq14AtiSGmZLrL01l6j rFqIGHHky/n6TtAuPIl9ubfs2EyDH3CWeYS3oBYbhY3BCATH5V/pf+kpcXRZ16iaxxRQ hjcNAvE7tQ1qlQC23tEFS3IguZA97Gk70NHhh/Gr/dV7vVBYQgJmOXZmTVMKWBa/OVEW SeNg== X-Gm-Message-State: AOAM5337vGhckS+4HVNBF2Y1AurR+cfX/z7CVp3kmvFoDb/oiCGfuNJi RfVcZSWmWOwW7X085Plz8IDDYwPOQrgD+aKMN0D2NZX1syniUWm/Y6+IDjmx5hp/NH3wzWtE/1E nnGkD7F+xQXCe7Lma3+92hlcJCv6MrdWbywSjuT03XTm2tVE08lmT35V0LyDRmR814fN8I4BQlW ligdZSiokUwbzw7bw= X-Google-Smtp-Source: ABdhPJxRT06WYWMzy6IgpnaksRNyLtsXRIBd5TMzRaIN8b1hE5q3P0HV45w38p43aqDT1WXCjpD+cg== X-Received: by 2002:a63:e114:: with SMTP id z20mr9145887pgh.207.1621592798700; Fri, 21 May 2021 03:26:38 -0700 (PDT) Received: from dhcp-10-123-20-83.dhcp.broadcom.net ([192.19.234.250]) by smtp.gmail.com with ESMTPSA id j3sm4197858pfe.98.2021.05.21.03.26.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 21 May 2021 03:26:38 -0700 (PDT) From: Chandrakanth Patil To: linux-scsi@vger.kernel.org Cc: kashyap.desai@broadcom.com, sumit.saxena@broadcom.com, Chandrakanth Patil Subject: [PATCH v2 3/5] megaraid_sas: Early detection of VD deletion through RaidMap update Date: Fri, 21 May 2021 15:55:46 +0530 Message-Id: <20210521102548.11156-4-chandrakanth.patil@broadcom.com> X-Mailer: git-send-email 2.18.1 In-Reply-To: <20210521102548.11156-1-chandrakanth.patil@broadcom.com> References: <20210521102548.11156-1-chandrakanth.patil@broadcom.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Consider in a case, when a VD is deleted and the targetID of that VD is assigned to a newly created VD. If the sequence of deletion/addition of VD happens very quickly, there is a possibility that second event(VD add) occurs even before the driver processes the first event(VD delete). As event processing is done in deferred context the device list remains same(but targetID is re-used) so driver will not learn the VD deletion/additon and IOs meant for older VD will be directed to new VD which may lead to data corruption. In new design, driver will detect the deleted VD as soon as possible based on the RaidMap update and blocks further IOs to that device. Reported-by: kernel test robot Signed-off-by: Kashyap Desai Signed-off-by: Chandrakanth Patil --- drivers/scsi/megaraid/megaraid_sas.h | 12 ++++ drivers/scsi/megaraid/megaraid_sas_base.c | 83 ++++++++++++++++++++--- drivers/scsi/megaraid/megaraid_sas_fp.c | 6 +- 3 files changed, 92 insertions(+), 9 deletions(-) diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h index b5a765b73c76..a43b67299b08 100644 --- a/drivers/scsi/megaraid/megaraid_sas.h +++ b/drivers/scsi/megaraid/megaraid_sas.h @@ -2262,6 +2262,15 @@ enum MR_PERF_MODE { (mode) == MR_LATENCY_PERF_MODE ? "Latency" : \ "Unknown") +enum MEGASAS_LD_TARGET_ID_STATUS { + LD_TARGET_ID_INITIAL, + LD_TARGET_ID_ACTIVE, + LD_TARGET_ID_DELETED, +}; + +#define MEGASAS_TARGET_ID(sdev) \ + (((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) + sdev->id) + struct megasas_instance { unsigned int *reply_map; @@ -2326,6 +2335,9 @@ struct megasas_instance { struct megasas_pd_list pd_list[MEGASAS_MAX_PD]; struct megasas_pd_list local_pd_list[MEGASAS_MAX_PD]; u8 ld_ids[MEGASAS_MAX_LD_IDS]; + u8 ld_tgtid_status[MEGASAS_MAX_LD_IDS]; + u8 ld_ids_prev[MEGASAS_MAX_LD_IDS]; + u8 ld_ids_from_raidmap[MEGASAS_MAX_LD_IDS]; s8 init_id; u16 max_num_sge; diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index 35b2137e0d1a..9cb167069ec8 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -141,6 +141,8 @@ static int megasas_register_aen(struct megasas_instance *instance, u32 seq_num, u32 class_locale_word); static void megasas_get_pd_info(struct megasas_instance *instance, struct scsi_device *sdev); +static void +megasas_set_ld_removed_by_fw(struct megasas_instance *instance); /* * PCI ID table for all supported controllers @@ -436,6 +438,12 @@ megasas_decode_evt(struct megasas_instance *instance) (class_locale.members.locale), format_class(class_locale.members.class), evt_detail->description); + + if (megasas_dbg_lvl & LD_PD_DEBUG) + dev_info(&instance->pdev->dev, + "evt_detail.args.ld.target_id/index %d/%d\n", + evt_detail->args.ld.target_id, evt_detail->args.ld.ld_index); + } /* @@ -1779,6 +1787,7 @@ megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd) { struct megasas_instance *instance; struct MR_PRIV_DEVICE *mr_device_priv_data; + u32 ld_tgt_id; instance = (struct megasas_instance *) scmd->device->host->hostdata; @@ -1805,17 +1814,21 @@ megasas_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd) } } - if (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR) { + mr_device_priv_data = scmd->device->hostdata; + if (!mr_device_priv_data || + (atomic_read(&instance->adprecovery) == MEGASAS_HW_CRITICAL_ERROR)) { scmd->result = DID_NO_CONNECT << 16; scmd->scsi_done(scmd); return 0; } - mr_device_priv_data = scmd->device->hostdata; - if (!mr_device_priv_data) { - scmd->result = DID_NO_CONNECT << 16; - scmd->scsi_done(scmd); - return 0; + if (MEGASAS_IS_LOGICAL(scmd->device)) { + ld_tgt_id = MEGASAS_TARGET_ID(scmd->device); + if (instance->ld_tgtid_status[ld_tgt_id] == LD_TARGET_ID_DELETED) { + scmd->result = DID_NO_CONNECT << 16; + scmd->scsi_done(scmd); + return 0; + } } if (atomic_read(&instance->adprecovery) != MEGASAS_HBA_OPERATIONAL) @@ -2095,7 +2108,7 @@ static int megasas_slave_configure(struct scsi_device *sdev) static int megasas_slave_alloc(struct scsi_device *sdev) { - u16 pd_index = 0; + u16 pd_index = 0, ld_tgt_id; struct megasas_instance *instance ; struct MR_PRIV_DEVICE *mr_device_priv_data; @@ -2120,6 +2133,14 @@ static int megasas_slave_alloc(struct scsi_device *sdev) GFP_KERNEL); if (!mr_device_priv_data) return -ENOMEM; + + if (MEGASAS_IS_LOGICAL(sdev)) { + ld_tgt_id = MEGASAS_TARGET_ID(sdev); + instance->ld_tgtid_status[ld_tgt_id] = LD_TARGET_ID_ACTIVE; + if (megasas_dbg_lvl & LD_PD_DEBUG) + sdev_printk(KERN_INFO, sdev, "LD target ID %d created.\n", ld_tgt_id); + } + sdev->hostdata = mr_device_priv_data; atomic_set(&mr_device_priv_data->r1_ldio_hint, @@ -2129,6 +2150,19 @@ static int megasas_slave_alloc(struct scsi_device *sdev) static void megasas_slave_destroy(struct scsi_device *sdev) { + u16 ld_tgt_id; + struct megasas_instance *instance; + + instance = megasas_lookup_instance(sdev->host->host_no); + + if (MEGASAS_IS_LOGICAL(sdev)) { + ld_tgt_id = MEGASAS_TARGET_ID(sdev); + instance->ld_tgtid_status[ld_tgt_id] = LD_TARGET_ID_DELETED; + if (megasas_dbg_lvl & LD_PD_DEBUG) + sdev_printk(KERN_INFO, sdev, + "LD target ID %d removed from OS stack\n", ld_tgt_id); + } + kfree(sdev->hostdata); sdev->hostdata = NULL; } @@ -3525,6 +3559,22 @@ megasas_complete_abort(struct megasas_instance *instance, } } +static void +megasas_set_ld_removed_by_fw(struct megasas_instance *instance) +{ + uint i; + + for (i = 0; (i < MEGASAS_MAX_LD_IDS); i++) { + if (instance->ld_ids_prev[i] != 0xff && + instance->ld_ids_from_raidmap[i] == 0xff) { + if (megasas_dbg_lvl & LD_PD_DEBUG) + dev_info(&instance->pdev->dev, + "LD target ID %d removed from RAID map\n", i); + instance->ld_tgtid_status[i] = LD_TARGET_ID_DELETED; + } + } +} + /** * megasas_complete_cmd - Completes a command * @instance: Adapter soft state @@ -3687,9 +3737,13 @@ megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd, fusion->fast_path_io = 0; } + if (instance->adapter_type >= INVADER_SERIES) + megasas_set_ld_removed_by_fw(instance); + megasas_sync_map_info(instance); spin_unlock_irqrestore(instance->host->host_lock, flags); + break; } if (opcode == MR_DCMD_CTRL_EVENT_GET_INFO || @@ -8831,8 +8885,10 @@ megasas_aen_polling(struct work_struct *work) union megasas_evt_class_locale class_locale; int event_type = 0; u32 seq_num; + u16 ld_target_id; int error; u8 dcmd_ret = DCMD_SUCCESS; + struct scsi_device *sdev1; if (!instance) { printk(KERN_ERR "invalid instance!\n"); @@ -8855,12 +8911,23 @@ megasas_aen_polling(struct work_struct *work) break; case MR_EVT_LD_OFFLINE: - case MR_EVT_CFG_CLEARED: case MR_EVT_LD_DELETED: + ld_target_id = instance->evt_detail->args.ld.target_id; + sdev1 = scsi_device_lookup(instance->host, + MEGASAS_MAX_PD_CHANNELS + + (ld_target_id / MEGASAS_MAX_DEV_PER_CHANNEL), + (ld_target_id - MEGASAS_MAX_DEV_PER_CHANNEL), + 0); + if (sdev1) + megasas_remove_scsi_device(sdev1); + + event_type = SCAN_VD_CHANNEL; + break; case MR_EVT_LD_CREATED: event_type = SCAN_VD_CHANNEL; break; + case MR_EVT_CFG_CLEARED: case MR_EVT_CTRL_HOST_BUS_SCAN_REQUESTED: case MR_EVT_FOREIGN_CFG_IMPORTED: case MR_EVT_LD_STATE_CHANGE: diff --git a/drivers/scsi/megaraid/megaraid_sas_fp.c b/drivers/scsi/megaraid/megaraid_sas_fp.c index b6c08d620033..83f69c33b01a 100644 --- a/drivers/scsi/megaraid/megaraid_sas_fp.c +++ b/drivers/scsi/megaraid/megaraid_sas_fp.c @@ -349,6 +349,10 @@ u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id) num_lds = le16_to_cpu(drv_map->raidMap.ldCount); + memcpy(instance->ld_ids_prev, + instance->ld_ids_from_raidmap, + sizeof(instance->ld_ids_from_raidmap)); + memset(instance->ld_ids_from_raidmap, 0xff, MEGASAS_MAX_LD_IDS); /*Convert Raid capability values to CPU arch */ for (i = 0; (num_lds > 0) && (i < MAX_LOGICAL_DRIVES_EXT); i++) { ld = MR_TargetIdToLdGet(i, drv_map); @@ -359,7 +363,7 @@ u8 MR_ValidateMapInfo(struct megasas_instance *instance, u64 map_id) raid = MR_LdRaidGet(ld, drv_map); le32_to_cpus((u32 *)&raid->capability); - + instance->ld_ids_from_raidmap[i] = i; num_lds--; }