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i40e: drop flow control frames from VF

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This patch adds a workaround to drop flow control frames from being
transmitted from VSIs.
With this patch in place a malicious VF cannot send flow control or PFC
packets out on the wire.

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Wenzhuo Lu <wenzhuo.lu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
This commit is contained in:
Jingjing Wu 2015-10-19 14:31:57 +08:00 committed by Thomas Monjalon
parent 10f4620f02
commit 909119cd4d
1 changed files with 30 additions and 0 deletions
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30
drivers/net/i40e/i40e_ethdev.c
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@ -382,6 +382,30 @@ static inline void i40e_flex_payload_reg_init(struct i40e_hw *hw)
I40E_WRITE_REG(hw, I40E_GLQF_PIT(17), 0x00007440);
}
#define I40E_FLOW_CONTROL_ETHERTYPE 0x8808
/*
* Add a ethertype filter to drop all flow control frames transmitted
* from VSIs.
*/
static void
i40e_add_tx_flow_control_drop_filter(struct i40e_pf *pf)
{
struct i40e_hw *hw = I40E_PF_TO_HW(pf);
uint16_t flags = I40E_AQC_ADD_CONTROL_PACKET_FLAGS_IGNORE_MAC |
I40E_AQC_ADD_CONTROL_PACKET_FLAGS_DROP |
I40E_AQC_ADD_CONTROL_PACKET_FLAGS_TX;
int ret;
ret = i40e_aq_add_rem_control_packet_filter(hw, NULL,
I40E_FLOW_CONTROL_ETHERTYPE, flags,
pf->main_vsi_seid, 0,
TRUE, NULL, NULL);
if (ret)
PMD_INIT_LOG(ERR, "Failed to add filter to drop flow control "
" frames from VSIs.");
}
static int
eth_i40e_dev_init(struct rte_eth_dev *dev)
{
@ -584,6 +608,12 @@ eth_i40e_dev_init(struct rte_eth_dev *dev)
/* enable uio intr after callback register */
rte_intr_enable(&(pci_dev->intr_handle));
/*
* Add an ethertype filter to drop all flow control frames transmitted
* from VSIs. By doing so, we stop VF from sending out PAUSE or PFC
* frames to wire.
*/
i40e_add_tx_flow_control_drop_filter(pf);
/* initialize mirror rule list */
TAILQ_INIT(&pf->mirror_list);