From 8ff0003c19412b04f70bfbe59fa52822417f86c3 Mon Sep 17 00:00:00 2001 From: David Marchand Date: Wed, 10 Apr 2019 14:53:46 +0200 Subject: [PATCH] net/bonding: fix out of bound access in LACP mode We'd better consolidate the fast queue and the normal tx burst functions under a common inline wrapper for maintenance. But looking closer at the bufs_slave_port_idxs[] mapping array in those tx burst functions, its size is invalid since up to nb_bufs are handled here. A previous patch [1] fixed this issue for balance tx burst function without mentioning it. 802.3ad and balance modes are functionally equivalent on transmit. The only difference is on the slave id distribution. Add an additional inline wrapper to consolidate even more and fix this issue. [1]: https://git.dpdk.org/dpdk/commit/?id=c5224f623431 Fixes: 09150784a776 ("net/bonding: burst mode hash calculation") Cc: stable@dpdk.org Signed-off-by: David Marchand Acked-by: Chas Williams --- drivers/net/bonding/rte_eth_bond_pmd.c | 213 ++++++------------------- 1 file changed, 51 insertions(+), 162 deletions(-) diff --git a/drivers/net/bonding/rte_eth_bond_pmd.c b/drivers/net/bonding/rte_eth_bond_pmd.c index 6a6ed890a0..6abd9581cc 100644 --- a/drivers/net/bonding/rte_eth_bond_pmd.c +++ b/drivers/net/bonding/rte_eth_bond_pmd.c @@ -2,6 +2,7 @@ * Copyright(c) 2010-2017 Intel Corporation */ #include +#include #include #include @@ -292,97 +293,6 @@ bond_ethdev_rx_burst_8023ad_fast_queue(void *queue, struct rte_mbuf **bufs, return num_rx_total; } -static uint16_t -bond_ethdev_tx_burst_8023ad_fast_queue(void *queue, struct rte_mbuf **bufs, - uint16_t nb_bufs) -{ - struct bond_tx_queue *bd_tx_q = (struct bond_tx_queue *)queue; - struct bond_dev_private *internals = bd_tx_q->dev_private; - - uint16_t slave_port_ids[RTE_MAX_ETHPORTS]; - uint16_t slave_count; - - uint16_t dist_slave_port_ids[RTE_MAX_ETHPORTS]; - uint16_t dist_slave_count; - - /* 2-D array to sort mbufs for transmission on each slave into */ - struct rte_mbuf *slave_bufs[RTE_MAX_ETHPORTS][nb_bufs]; - /* Number of mbufs for transmission on each slave */ - uint16_t slave_nb_bufs[RTE_MAX_ETHPORTS] = { 0 }; - /* Mapping array generated by hash function to map mbufs to slaves */ - uint16_t bufs_slave_port_idxs[RTE_MAX_ETHPORTS] = { 0 }; - - uint16_t slave_tx_count; - uint16_t total_tx_count = 0, total_tx_fail_count = 0; - - uint16_t i; - - if (unlikely(nb_bufs == 0)) - return 0; - - /* Copy slave list to protect against slave up/down changes during tx - * bursting */ - slave_count = internals->active_slave_count; - if (unlikely(slave_count < 1)) - return 0; - - memcpy(slave_port_ids, internals->active_slaves, - sizeof(slave_port_ids[0]) * slave_count); - - - dist_slave_count = 0; - for (i = 0; i < slave_count; i++) { - struct port *port = &bond_mode_8023ad_ports[slave_port_ids[i]]; - - if (ACTOR_STATE(port, DISTRIBUTING)) - dist_slave_port_ids[dist_slave_count++] = - slave_port_ids[i]; - } - - if (unlikely(dist_slave_count < 1)) - return 0; - - /* - * Populate slaves mbuf with the packets which are to be sent on it - * selecting output slave using hash based on xmit policy - */ - internals->burst_xmit_hash(bufs, nb_bufs, dist_slave_count, - bufs_slave_port_idxs); - - for (i = 0; i < nb_bufs; i++) { - /* Populate slave mbuf arrays with mbufs for that slave. */ - uint16_t slave_idx = bufs_slave_port_idxs[i]; - - slave_bufs[slave_idx][slave_nb_bufs[slave_idx]++] = bufs[i]; - } - - - /* Send packet burst on each slave device */ - for (i = 0; i < dist_slave_count; i++) { - if (slave_nb_bufs[i] == 0) - continue; - - slave_tx_count = rte_eth_tx_burst(dist_slave_port_ids[i], - bd_tx_q->queue_id, slave_bufs[i], - slave_nb_bufs[i]); - - total_tx_count += slave_tx_count; - - /* If tx burst fails move packets to end of bufs */ - if (unlikely(slave_tx_count < slave_nb_bufs[i])) { - int slave_tx_fail_count = slave_nb_bufs[i] - - slave_tx_count; - total_tx_fail_count += slave_tx_fail_count; - memcpy(&bufs[nb_bufs - total_tx_fail_count], - &slave_bufs[i][slave_tx_count], - slave_tx_fail_count * sizeof(bufs[0])); - } - } - - return total_tx_count; -} - - static uint16_t bond_ethdev_rx_burst_8023ad(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) @@ -1212,16 +1122,13 @@ bond_ethdev_tx_burst_alb(void *queue, struct rte_mbuf **bufs, uint16_t nb_pkts) return num_tx_total; } -static uint16_t -bond_ethdev_tx_burst_balance(void *queue, struct rte_mbuf **bufs, - uint16_t nb_bufs) +static inline uint16_t +tx_burst_balance(void *queue, struct rte_mbuf **bufs, uint16_t nb_bufs, + uint16_t *slave_port_ids, uint16_t slave_count) { struct bond_tx_queue *bd_tx_q = (struct bond_tx_queue *)queue; struct bond_dev_private *internals = bd_tx_q->dev_private; - uint16_t slave_port_ids[RTE_MAX_ETHPORTS]; - uint16_t slave_count; - /* Array to sort mbufs for transmission on each slave into */ struct rte_mbuf *slave_bufs[RTE_MAX_ETHPORTS][nb_bufs]; /* Number of mbufs for transmission on each slave */ @@ -1234,18 +1141,6 @@ bond_ethdev_tx_burst_balance(void *queue, struct rte_mbuf **bufs, uint16_t i; - if (unlikely(nb_bufs == 0)) - return 0; - - /* Copy slave list to protect against slave up/down changes during tx - * bursting */ - slave_count = internals->active_slave_count; - if (unlikely(slave_count < 1)) - return 0; - - memcpy(slave_port_ids, internals->active_slaves, - sizeof(slave_port_ids[0]) * slave_count); - /* * Populate slaves mbuf with the packets which are to be sent on it * selecting output slave using hash based on xmit policy @@ -1286,7 +1181,7 @@ bond_ethdev_tx_burst_balance(void *queue, struct rte_mbuf **bufs, } static uint16_t -bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, +bond_ethdev_tx_burst_balance(void *queue, struct rte_mbuf **bufs, uint16_t nb_bufs) { struct bond_tx_queue *bd_tx_q = (struct bond_tx_queue *)queue; @@ -1295,18 +1190,36 @@ bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, uint16_t slave_port_ids[RTE_MAX_ETHPORTS]; uint16_t slave_count; + if (unlikely(nb_bufs == 0)) + return 0; + + /* Copy slave list to protect against slave up/down changes during tx + * bursting + */ + slave_count = internals->active_slave_count; + if (unlikely(slave_count < 1)) + return 0; + + memcpy(slave_port_ids, internals->active_slaves, + sizeof(slave_port_ids[0]) * slave_count); + return tx_burst_balance(queue, bufs, nb_bufs, slave_port_ids, + slave_count); +} + +static inline uint16_t +tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, uint16_t nb_bufs, + bool dedicated_txq) +{ + struct bond_tx_queue *bd_tx_q = (struct bond_tx_queue *)queue; + struct bond_dev_private *internals = bd_tx_q->dev_private; + + uint16_t slave_port_ids[RTE_MAX_ETHPORTS]; + uint16_t slave_count; + uint16_t dist_slave_port_ids[RTE_MAX_ETHPORTS]; uint16_t dist_slave_count; - /* 2-D array to sort mbufs for transmission on each slave into */ - struct rte_mbuf *slave_bufs[RTE_MAX_ETHPORTS][nb_bufs]; - /* Number of mbufs for transmission on each slave */ - uint16_t slave_nb_bufs[RTE_MAX_ETHPORTS] = { 0 }; - /* Mapping array generated by hash function to map mbufs to slaves */ - uint16_t bufs_slave_port_idxs[RTE_MAX_ETHPORTS] = { 0 }; - uint16_t slave_tx_count; - uint16_t total_tx_count = 0, total_tx_fail_count = 0; uint16_t i; @@ -1319,6 +1232,9 @@ bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, memcpy(slave_port_ids, internals->active_slaves, sizeof(slave_port_ids[0]) * slave_count); + if (dedicated_txq) + goto skip_tx_ring; + /* Check for LACP control packets and send if available */ for (i = 0; i < slave_count; i++) { struct port *port = &bond_mode_8023ad_ports[slave_port_ids[i]]; @@ -1340,6 +1256,7 @@ bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, } } +skip_tx_ring: if (unlikely(nb_bufs == 0)) return 0; @@ -1352,53 +1269,25 @@ bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, slave_port_ids[i]; } - if (likely(dist_slave_count > 0)) { - - /* - * Populate slaves mbuf with the packets which are to be sent - * on it, selecting output slave using hash based on xmit policy - */ - internals->burst_xmit_hash(bufs, nb_bufs, dist_slave_count, - bufs_slave_port_idxs); - - for (i = 0; i < nb_bufs; i++) { - /* - * Populate slave mbuf arrays with mbufs for that - * slave - */ - uint16_t slave_idx = bufs_slave_port_idxs[i]; - - slave_bufs[slave_idx][slave_nb_bufs[slave_idx]++] = - bufs[i]; - } - - - /* Send packet burst on each slave device */ - for (i = 0; i < dist_slave_count; i++) { - if (slave_nb_bufs[i] == 0) - continue; - - slave_tx_count = rte_eth_tx_burst( - dist_slave_port_ids[i], - bd_tx_q->queue_id, slave_bufs[i], - slave_nb_bufs[i]); - - total_tx_count += slave_tx_count; + if (unlikely(dist_slave_count < 1)) + return 0; - /* If tx burst fails move packets to end of bufs */ - if (unlikely(slave_tx_count < slave_nb_bufs[i])) { - int slave_tx_fail_count = slave_nb_bufs[i] - - slave_tx_count; - total_tx_fail_count += slave_tx_fail_count; + return tx_burst_balance(queue, bufs, nb_bufs, dist_slave_port_ids, + dist_slave_count); +} - memcpy(&bufs[nb_bufs - total_tx_fail_count], - &slave_bufs[i][slave_tx_count], - slave_tx_fail_count * sizeof(bufs[0])); - } - } - } +static uint16_t +bond_ethdev_tx_burst_8023ad(void *queue, struct rte_mbuf **bufs, + uint16_t nb_bufs) +{ + return tx_burst_8023ad(queue, bufs, nb_bufs, false); +} - return total_tx_count; +static uint16_t +bond_ethdev_tx_burst_8023ad_fast_queue(void *queue, struct rte_mbuf **bufs, + uint16_t nb_bufs) +{ + return tx_burst_8023ad(queue, bufs, nb_bufs, true); } static uint16_t -- 2.20.1