From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 07E54A04E7; Wed, 4 Nov 2020 03:58:13 +0100 (CET) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 88DE4BE7B; Wed, 4 Nov 2020 03:58:10 +0100 (CET) Received: from szxga06-in.huawei.com (szxga06-in.huawei.com [45.249.212.32]) by dpdk.org (Postfix) with ESMTP id A91DBBE5F; Wed, 4 Nov 2020 03:58:07 +0100 (CET) Received: from DGGEMS411-HUB.china.huawei.com (unknown [172.30.72.58]) by szxga06-in.huawei.com (SkyGuard) with ESMTP id 4CQrth2WpKzhdNH; Wed, 4 Nov 2020 10:58:04 +0800 (CST) Received: from localhost (10.174.187.156) by DGGEMS411-HUB.china.huawei.com (10.3.19.211) with Microsoft SMTP Server id 14.3.487.0; Wed, 4 Nov 2020 10:57:58 +0800 From: wangyunjian To: CC: , , , , , , Yunjian Wang , Date: Wed, 4 Nov 2020 10:57:57 +0800 Message-ID: <1604458677-34696-1-git-send-email-wangyunjian@huawei.com> X-Mailer: git-send-email 1.9.5.msysgit.1 In-Reply-To: <1604308702-7744-1-git-send-email-wangyunjian@huawei.com> References: <1604308702-7744-1-git-send-email-wangyunjian@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.174.187.156] X-CFilter-Loop: Reflected Subject: [dpdk-dev] [PATCH v4] ethdev: fix data type for port id X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" From: Yunjian Wang The ethdev port id is 16 bits now. This patch fixes the data type of the variable for 'pid', which changing from uint32_t to uint16_t. RTE_MAX_ETHPORTS is the maximum number of ports, which customized by the user. To avoid 16-bit unsigned integer overflow, the valid value of RTE_MAX_ETHPORTS should be set from 0 to UINT16_MAX, and it is safer to cut one more port from space. So we use RTE_BUILD_BUG_ON() to ensure that RTE_MAX_ETHPORTS is less to UINT16_MAX. Fixes: 5b7ba31148a8 ("ethdev: add port ownership") Cc: stable@dpdk.org Signed-off-by: Yunjian Wang --- v4: remove redundant compile checks v3: fix code styles suggested by Thomas Monjalon and Andrew Rybchenko v2: add RTE_BUILD_BUG_ON() check for RTE_MAX_ETHPORTS validity --- lib/librte_ethdev/rte_ethdev.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff --git a/lib/librte_ethdev/rte_ethdev.c b/lib/librte_ethdev/rte_ethdev.c index b12bb3854d..0af8e4d76c 100644 --- a/lib/librte_ethdev/rte_ethdev.c +++ b/lib/librte_ethdev/rte_ethdev.c @@ -411,7 +411,9 @@ eth_dev_is_allocated(const struct rte_eth_dev *ethdev) static struct rte_eth_dev * eth_dev_allocated(const char *name) { - unsigned i; + uint16_t i; + + RTE_BUILD_BUG_ON(RTE_MAX_ETHPORTS >= UINT16_MAX); for (i = 0; i < RTE_MAX_ETHPORTS; i++) { if (rte_eth_devices[i].data != NULL && @@ -440,7 +442,7 @@ rte_eth_dev_allocated(const char *name) static uint16_t eth_dev_find_free_port(void) { - unsigned i; + uint16_t i; for (i = 0; i < RTE_MAX_ETHPORTS; i++) { /* Using shared name field to find a free port. */ @@ -816,7 +818,7 @@ rte_eth_dev_get_name_by_port(uint16_t port_id, char *name) int rte_eth_dev_get_port_by_name(const char *name, uint16_t *port_id) { - uint32_t pid; + uint16_t pid; if (name == NULL) { RTE_ETHDEV_LOG(ERR, "Null pointer is specified\n"); @@ -4290,7 +4292,7 @@ rte_eth_mirror_rule_reset(uint16_t port_id, uint8_t rule_id) RTE_INIT(eth_dev_init_cb_lists) { - int i; + uint16_t i; for (i = 0; i < RTE_MAX_ETHPORTS; i++) TAILQ_INIT(&rte_eth_devices[i].link_intr_cbs); @@ -4303,7 +4305,7 @@ rte_eth_dev_callback_register(uint16_t port_id, { struct rte_eth_dev *dev; struct rte_eth_dev_callback *user_cb; - uint32_t next_port; /* size is 32-bit to prevent loop wrap-around */ + uint16_t next_port; uint16_t last_port; if (!cb_fn) @@ -4366,7 +4368,7 @@ rte_eth_dev_callback_unregister(uint16_t port_id, int ret; struct rte_eth_dev *dev; struct rte_eth_dev_callback *cb, *next; - uint32_t next_port; /* size is 32-bit to prevent loop wrap-around */ + uint16_t next_port; uint16_t last_port; if (!cb_fn) @@ -5507,7 +5509,7 @@ static struct rte_eth_dev_switch { int rte_eth_switch_domain_alloc(uint16_t *domain_id) { - unsigned int i; + uint16_t i; *domain_id = RTE_ETH_DEV_SWITCH_DOMAIN_ID_INVALID; -- 2.18.1