2bc06869cd
By default, a tap netdevice is of no use when not fed by a separate process. The ability to automatically feed it from another netdevice allows applications to capture any kind of traffic normally destined to the kernel stack. This patch implements this ability through a new optional "remote" parameter. Packets matching filtering rules created with the flow API are matched on the remote device and redirected to the tap PMD, where the relevant action will be performed. Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com> Acked-by: Olga Shern <olgas@mellanox.com> Acked-by: Keith Wiles <keith.wiles@intel.com>
96 lines
4.1 KiB
C
96 lines
4.1 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2017 6WIND S.A.
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* Copyright 2017 Mellanox.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of 6WIND S.A. nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTE_ETH_TAP_H_
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#define _RTE_ETH_TAP_H_
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#include <sys/queue.h>
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#include <sys/uio.h>
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#include <inttypes.h>
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#include <linux/if_tun.h>
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#include <rte_ethdev.h>
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#include <rte_ether.h>
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#define RTE_PMD_TAP_MAX_QUEUES 16
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struct pkt_stats {
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uint64_t opackets; /* Number of output packets */
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uint64_t ipackets; /* Number of input packets */
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uint64_t obytes; /* Number of bytes on output */
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uint64_t ibytes; /* Number of bytes on input */
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uint64_t errs; /* Number of TX error packets */
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uint64_t ierrors; /* Number of RX error packets */
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uint64_t rx_nombuf; /* Nb of RX mbuf alloc failures */
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};
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struct rx_queue {
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struct rte_mempool *mp; /* Mempool for RX packets */
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uint32_t trigger_seen; /* Last seen Rx trigger value */
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uint16_t in_port; /* Port ID */
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int fd;
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struct pkt_stats stats; /* Stats for this RX queue */
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uint16_t nb_rx_desc; /* max number of mbufs available */
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struct rte_eth_rxmode *rxmode; /* RX features */
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struct rte_mbuf *pool; /* mbufs pool for this queue */
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struct iovec (*iovecs)[]; /* descriptors for this queue */
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struct tun_pi pi; /* packet info for iovecs */
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};
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struct tx_queue {
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int fd;
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uint16_t *mtu; /* Pointer to MTU from dev_data */
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struct pkt_stats stats; /* Stats for this TX queue */
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};
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struct pmd_internals {
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char remote_iface[RTE_ETH_NAME_MAX_LEN]; /* Remote netdevice name */
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char name[RTE_ETH_NAME_MAX_LEN]; /* Internal Tap device name */
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uint16_t nb_queues; /* Number of queues supported */
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struct ether_addr eth_addr; /* Mac address of the device port */
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int remote_if_index; /* remote netdevice IF_INDEX */
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int if_index; /* IF_INDEX for the port */
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int ioctl_sock; /* socket for ioctl calls */
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int nlsk_fd; /* Netlink socket fd */
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int flower_support; /* 1 if kernel supports, else 0 */
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int flower_vlan_support; /* 1 if kernel supports, else 0 */
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LIST_HEAD(tap_flows, rte_flow) flows; /* rte_flow rules */
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/* implicit rte_flow rules set when a remote device is active */
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LIST_HEAD(tap_implicit_flows, rte_flow) implicit_flows;
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struct rx_queue rxq[RTE_PMD_TAP_MAX_QUEUES]; /* List of RX queues */
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struct tx_queue txq[RTE_PMD_TAP_MAX_QUEUES]; /* List of TX queues */
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};
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#endif /* _RTE_ETH_TAP_H_ */
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