From patchwork Mon Dec 5 08:06:49 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jitendra Bhivare X-Patchwork-Id: 9460591 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 0D4236071F for ; Mon, 5 Dec 2016 08:07:32 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id F208D20009 for ; Mon, 5 Dec 2016 08:07:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E6DBB2026B; Mon, 5 Dec 2016 08:07:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 06AD120009 for ; Mon, 5 Dec 2016 08:07:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751451AbcLEIHa (ORCPT ); Mon, 5 Dec 2016 03:07:30 -0500 Received: from mail-qk0-f177.google.com ([209.85.220.177]:34863 "EHLO mail-qk0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750849AbcLEIH3 (ORCPT ); Mon, 5 Dec 2016 03:07:29 -0500 Received: by mail-qk0-f177.google.com with SMTP id n204so338338123qke.2 for ; Mon, 05 Dec 2016 00:07:29 -0800 (PST) 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=LYcHPO5ljvAuKLzzPPLAhdrn9T8akiYtqjkNPyEekC0=; b=cf0kHhT6fUeUgfjLDgOBmuJxQtpgy7tYDWNsclV6ZuUTi5u2y9NJgFWUo0139NxN6b NLhhayF06Wjg9W8VSH4IrJA2rqCCLbocG+lb9T8R3JQi60PD7aZKZBdKJcNGpnDwppCi 1DpDv4m1Bqs9KEqwy1Uo/XhGJmKqfCG9Ty9fo= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=LYcHPO5ljvAuKLzzPPLAhdrn9T8akiYtqjkNPyEekC0=; b=P+cDbpATE0Hl0WOG6WbF5ARbpYz9YazjvBNFdxjM1fSl5X0B5eCgVJoMI/Ncm+hU9J pOr8wMlIkKJ6FcfsAsao2KEhdqED6a4BP0zWtkns4cNvb4T4/5q2WDhj4a/u2dlHogCK NbXRwQB26JHiUc1RAKJGVJWmysal4zTfONxBtgtLg6VMe1/ErTgC92jCbEmZSjdRss/3 iQwwbmL3T+ooZ+SiKHpAsMXV6KTAWIAwrY3RZFLAqfHrqZeGIt+IoY/wnT0d/0XicSK/ /ht8PKtwDvOIrUiUgZsQ5CdP52D0/RhzSaEC9jQnTykhw/ybP1v0sJre0g8eGZ05OEXO 22VQ== X-Gm-Message-State: AKaTC00VJOuJeZvQ7XlzHHhiHqEYYP4MamEKqSa1MR+1LCFtvwNw+1mKue0Az1D0BvvcoQRZ X-Received: by 10.55.15.100 with SMTP id z97mr48418433qkg.165.1480925248595; Mon, 05 Dec 2016 00:07:28 -0800 (PST) Received: from android.dhcp.avagotech.net ([192.19.239.250]) by smtp.gmail.com with ESMTPSA id i19sm8890519qte.8.2016.12.05.00.07.26 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 05 Dec 2016 00:07:28 -0800 (PST) From: Jitendra Bhivare To: cleech@redhat.com, lduncan@suse.com Cc: linux-scsi@vger.kernel.org, Jitendra Bhivare Subject: [PATCH 10/12] be2iscsi: Add checks to validate CID alloc/free Date: Mon, 5 Dec 2016 13:36:49 +0530 Message-Id: <1480925211-13223-11-git-send-email-jitendra.bhivare@broadcom.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1480925211-13223-1-git-send-email-jitendra.bhivare@broadcom.com> References: <1480925211-13223-1-git-send-email-jitendra.bhivare@broadcom.com> Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Set CID slot to 0xffff to indicate empty. Check if connection already exists in conn_table before binding. Check if endpoint already NULL before putting back CID. Break ep->conn link in free_ep to ignore completions after freeing. Signed-off-by: Jitendra Bhivare --- drivers/scsi/be2iscsi/be_iscsi.c | 163 ++++++++++++++++++++------------------- drivers/scsi/be2iscsi/be_main.c | 7 +- drivers/scsi/be2iscsi/be_main.h | 1 + 3 files changed, 87 insertions(+), 84 deletions(-) diff --git a/drivers/scsi/be2iscsi/be_iscsi.c b/drivers/scsi/be2iscsi/be_iscsi.c index 0ec0625..a484457 100644 --- a/drivers/scsi/be2iscsi/be_iscsi.c +++ b/drivers/scsi/be2iscsi/be_iscsi.c @@ -166,33 +166,6 @@ struct iscsi_cls_conn * } /** - * beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table - * @beiscsi_conn: The pointer to beiscsi_conn structure - * @phba: The phba instance - * @cid: The cid to free - */ -static int beiscsi_bindconn_cid(struct beiscsi_hba *phba, - struct beiscsi_conn *beiscsi_conn, - unsigned int cid) -{ - uint16_t cri_index = BE_GET_CRI_FROM_CID(cid); - - if (phba->conn_table[cri_index]) { - beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, - "BS_%d : Connection table already occupied. Detected clash\n"); - - return -EINVAL; - } else { - beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, - "BS_%d : phba->conn_table[%d]=%p(beiscsi_conn)\n", - cri_index, beiscsi_conn); - - phba->conn_table[cri_index] = beiscsi_conn; - } - return 0; -} - -/** * beiscsi_conn_bind - Binds iscsi session/connection with TCP connection * @cls_session: pointer to iscsi cls session * @cls_conn: pointer to iscsi cls conn @@ -212,6 +185,7 @@ int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, struct hwi_wrb_context *pwrb_context; struct beiscsi_endpoint *beiscsi_ep; struct iscsi_endpoint *ep; + uint16_t cri_index; ep = iscsi_lookup_endpoint(transport_fd); if (!ep) @@ -229,20 +203,34 @@ int beiscsi_conn_bind(struct iscsi_cls_session *cls_session, return -EEXIST; } - - pwrb_context = &phwi_ctrlr->wrb_context[BE_GET_CRI_FROM_CID( - beiscsi_ep->ep_cid)]; + cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); + if (phba->conn_table[cri_index]) { + if (beiscsi_conn != phba->conn_table[cri_index] || + beiscsi_ep != phba->conn_table[cri_index]->ep) { + __beiscsi_log(phba, KERN_ERR, + "BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n", + cri_index, + beiscsi_ep->ep_cid, + beiscsi_conn, + phba->conn_table[cri_index]); + return -EINVAL; + } + } beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid; beiscsi_conn->ep = beiscsi_ep; beiscsi_ep->conn = beiscsi_conn; + /** + * Each connection is associated with a WRBQ kept in wrb_context. + * Store doorbell offset for transmit path. + */ + pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset; - beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, - "BS_%d : beiscsi_conn=%p conn=%p ep_cid=%d\n", - beiscsi_conn, conn, beiscsi_ep->ep_cid); - - return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid); + "BS_%d : cid %d phba->conn_table[%u]=%p\n", + beiscsi_ep->ep_cid, cri_index, beiscsi_conn); + phba->conn_table[cri_index] = beiscsi_conn; + return 0; } static int beiscsi_iface_create_ipv4(struct beiscsi_hba *phba) @@ -973,9 +961,9 @@ int beiscsi_conn_start(struct iscsi_cls_conn *cls_conn) */ static int beiscsi_get_cid(struct beiscsi_hba *phba) { - unsigned short cid = 0xFFFF, cid_from_ulp; - struct ulp_cid_info *cid_info = NULL; uint16_t cid_avlbl_ulp0, cid_avlbl_ulp1; + unsigned short cid, cid_from_ulp; + struct ulp_cid_info *cid_info; /* Find the ULP which has more CID available */ cid_avlbl_ulp0 = (phba->cid_array_info[BEISCSI_ULP0]) ? @@ -984,20 +972,27 @@ static int beiscsi_get_cid(struct beiscsi_hba *phba) BEISCSI_ULP1_AVLBL_CID(phba) : 0; cid_from_ulp = (cid_avlbl_ulp0 > cid_avlbl_ulp1) ? BEISCSI_ULP0 : BEISCSI_ULP1; - - if (test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) { - cid_info = phba->cid_array_info[cid_from_ulp]; - if (!cid_info->avlbl_cids) - return cid; - - cid = cid_info->cid_array[cid_info->cid_alloc++]; - - if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT( - phba, cid_from_ulp)) - cid_info->cid_alloc = 0; - - cid_info->avlbl_cids--; + /** + * If iSCSI protocol is loaded only on ULP 0, and when cid_avlbl_ulp + * is ZERO for both, ULP 1 is returned. + * Check if ULP is loaded before getting new CID. + */ + if (!test_bit(cid_from_ulp, (void *)&phba->fw_config.ulp_supported)) + return BE_INVALID_CID; + + cid_info = phba->cid_array_info[cid_from_ulp]; + cid = cid_info->cid_array[cid_info->cid_alloc]; + if (!cid_info->avlbl_cids || cid == BE_INVALID_CID) { + __beiscsi_log(phba, KERN_ERR, + "BS_%d : failed to get cid: available %u:%u\n", + cid_info->avlbl_cids, cid_info->cid_free); + return BE_INVALID_CID; } + /* empty the slot */ + cid_info->cid_array[cid_info->cid_alloc++] = BE_INVALID_CID; + if (cid_info->cid_alloc == BEISCSI_GET_CID_COUNT(phba, cid_from_ulp)) + cid_info->cid_alloc = 0; + cid_info->avlbl_cids--; return cid; } @@ -1008,22 +1003,28 @@ static int beiscsi_get_cid(struct beiscsi_hba *phba) */ static void beiscsi_put_cid(struct beiscsi_hba *phba, unsigned short cid) { - uint16_t cid_post_ulp; - struct hwi_controller *phwi_ctrlr; - struct hwi_wrb_context *pwrb_context; - struct ulp_cid_info *cid_info = NULL; uint16_t cri_index = BE_GET_CRI_FROM_CID(cid); + struct hwi_wrb_context *pwrb_context; + struct hwi_controller *phwi_ctrlr; + struct ulp_cid_info *cid_info; + uint16_t cid_post_ulp; phwi_ctrlr = phba->phwi_ctrlr; pwrb_context = &phwi_ctrlr->wrb_context[cri_index]; cid_post_ulp = pwrb_context->ulp_num; cid_info = phba->cid_array_info[cid_post_ulp]; - cid_info->avlbl_cids++; - + /* fill only in empty slot */ + if (cid_info->cid_array[cid_info->cid_free] != BE_INVALID_CID) { + __beiscsi_log(phba, KERN_ERR, + "BS_%d : failed to put cid %u: available %u:%u\n", + cid, cid_info->avlbl_cids, cid_info->cid_free); + return; + } cid_info->cid_array[cid_info->cid_free++] = cid; if (cid_info->cid_free == BEISCSI_GET_CID_COUNT(phba, cid_post_ulp)) cid_info->cid_free = 0; + cid_info->avlbl_cids++; } /** @@ -1037,8 +1038,8 @@ static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) beiscsi_put_cid(phba, beiscsi_ep->ep_cid); beiscsi_ep->phba = NULL; - phba->ep_array[BE_GET_CRI_FROM_CID - (beiscsi_ep->ep_cid)] = NULL; + /* clear this to track freeing in beiscsi_ep_disconnect */ + phba->ep_array[BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid)] = NULL; /** * Check if any connection resource allocated by driver @@ -1049,6 +1050,11 @@ static void beiscsi_free_ep(struct beiscsi_endpoint *beiscsi_ep) return; beiscsi_conn = beiscsi_ep->conn; + /** + * Break ep->conn link here so that completions after + * this are ignored. + */ + beiscsi_ep->conn = NULL; if (beiscsi_conn->login_in_progress) { beiscsi_free_mgmt_task_handles(beiscsi_conn, beiscsi_conn->task); @@ -1079,7 +1085,7 @@ static int beiscsi_open_conn(struct iscsi_endpoint *ep, "BS_%d : In beiscsi_open_conn\n"); beiscsi_ep->ep_cid = beiscsi_get_cid(phba); - if (beiscsi_ep->ep_cid == 0xFFFF) { + if (beiscsi_ep->ep_cid == BE_INVALID_CID) { beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG, "BS_%d : No free cid available\n"); return ret; @@ -1285,26 +1291,6 @@ static int beiscsi_close_conn(struct beiscsi_endpoint *beiscsi_ep, int flag) } /** - * beiscsi_unbind_conn_to_cid - Unbind the beiscsi_conn from phba conn table - * @phba: The phba instance - * @cid: The cid to free - */ -static int beiscsi_unbind_conn_to_cid(struct beiscsi_hba *phba, - unsigned int cid) -{ - uint16_t cri_index = BE_GET_CRI_FROM_CID(cid); - - if (phba->conn_table[cri_index]) - phba->conn_table[cri_index] = NULL; - else { - beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, - "BS_%d : Connection table Not occupied.\n"); - return -EINVAL; - } - return 0; -} - -/** * beiscsi_ep_disconnect - Tears down the TCP connection * @ep: endpoint to be used * @@ -1318,13 +1304,23 @@ void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) unsigned int tag; uint8_t mgmt_invalidate_flag, tcp_upload_flag; unsigned short savecfg_flag = CMD_ISCSI_SESSION_SAVE_CFG_ON_FLASH; + uint16_t cri_index; beiscsi_ep = ep->dd_data; phba = beiscsi_ep->phba; beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG, - "BS_%d : In beiscsi_ep_disconnect for ep_cid = %d\n", + "BS_%d : In beiscsi_ep_disconnect for ep_cid = %u\n", beiscsi_ep->ep_cid); + cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid); + if (!phba->ep_array[cri_index]) { + __beiscsi_log(phba, KERN_ERR, + "BS_%d : ep_array at %u cid %u empty\n", + cri_index, + beiscsi_ep->ep_cid); + return; + } + if (beiscsi_ep->conn) { beiscsi_conn = beiscsi_ep->conn; iscsi_suspend_queue(beiscsi_conn->conn); @@ -1356,7 +1352,12 @@ void beiscsi_ep_disconnect(struct iscsi_endpoint *ep) free_ep: msleep(BEISCSI_LOGOUT_SYNC_DELAY); beiscsi_free_ep(beiscsi_ep); - beiscsi_unbind_conn_to_cid(phba, beiscsi_ep->ep_cid); + if (!phba->conn_table[cri_index]) + __beiscsi_log(phba, KERN_ERR, + "BS_%d : conn_table empty at %u: cid %u\n", + cri_index, + beiscsi_ep->ep_cid); + phba->conn_table[cri_index] = NULL; iscsi_destroy_endpoint(beiscsi_ep->openiscsi_ep); } diff --git a/drivers/scsi/be2iscsi/be_main.c b/drivers/scsi/be2iscsi/be_main.c index c04080f..3f3a138 100644 --- a/drivers/scsi/be2iscsi/be_main.c +++ b/drivers/scsi/be2iscsi/be_main.c @@ -4070,9 +4070,10 @@ static int hba_setup_cid_tbls(struct beiscsi_hba *phba) } /* Allocate memory for CID array */ - ptr_cid_info->cid_array = kzalloc(sizeof(void *) * - BEISCSI_GET_CID_COUNT(phba, - ulp_num), GFP_KERNEL); + ptr_cid_info->cid_array = + kcalloc(BEISCSI_GET_CID_COUNT(phba, ulp_num), + sizeof(*ptr_cid_info->cid_array), + GFP_KERNEL); if (!ptr_cid_info->cid_array) { beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_INIT, "BM_%d : Failed to allocate memory" diff --git a/drivers/scsi/be2iscsi/be_main.h b/drivers/scsi/be2iscsi/be_main.h index 30379de..02a9b2d 100644 --- a/drivers/scsi/be2iscsi/be_main.h +++ b/drivers/scsi/be2iscsi/be_main.h @@ -343,6 +343,7 @@ struct beiscsi_hba { spinlock_t async_pdu_lock; struct list_head hba_queue; #define BE_MAX_SESSION 2048 +#define BE_INVALID_CID 0xffff #define BE_SET_CID_TO_CRI(cri_index, cid) \ (phba->cid_to_cri_map[cid] = cri_index) #define BE_GET_CRI_FROM_CID(cid) (phba->cid_to_cri_map[cid])