c0bddd3a05
As tap is a virtual device, there's no physical way a link can be cut. However, it has an associated kernel netdevice and possibly a remote netdevice too. These netdevices link status may change outside of the DPDK scope, through an external command such as: ip link set dev tapX down This commit implements link status notification through netlink. Signed-off-by: Pascal Mazon <pascal.mazon@6wind.com> Acked-by: Keith Wiles <keith.wiles@intel.com>
70 lines
2.7 KiB
C
70 lines
2.7 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 _TAP_NETLINK_H_
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#define _TAP_NETLINK_H_
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#include <ctype.h>
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#include <inttypes.h>
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#include <linux/rtnetlink.h>
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#include <linux/netlink.h>
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#include <stdio.h>
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#include <rte_log.h>
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#define NLMSG_BUF 512
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struct nlmsg {
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struct nlmsghdr nh;
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struct tcmsg t;
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char buf[NLMSG_BUF];
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struct nested_tail *nested_tails;
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};
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#define NLMSG_TAIL(nlh) (void *)((char *)(nlh) + NLMSG_ALIGN((nlh)->nlmsg_len))
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int nl_init(uint32_t nl_groups);
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int nl_final(int nlsk_fd);
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int nl_send(int nlsk_fd, struct nlmsghdr *nh);
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int nl_recv(int nlsk_fd, int (*callback)(struct nlmsghdr *, void *), void *arg);
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int nl_recv_ack(int nlsk_fd);
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void nlattr_add(struct nlmsghdr *nh, unsigned short type,
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unsigned int data_len, const void *data);
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void nlattr_add8(struct nlmsghdr *nh, unsigned short type, uint8_t data);
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void nlattr_add16(struct nlmsghdr *nh, unsigned short type, uint16_t data);
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void nlattr_add32(struct nlmsghdr *nh, unsigned short type, uint32_t data);
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int nlattr_nested_start(struct nlmsg *msg, uint16_t type);
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void nlattr_nested_finish(struct nlmsg *msg);
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#endif /* _TAP_NETLINK_H_ */
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