98 строки
3.0 KiB
C
98 строки
3.0 KiB
C
/*
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* Copyright (c) 2014, Cisco Systems, Inc. All rights reserved.
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*
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* Portions of this software copied from libfabric
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* (https://github.com/ofiwg/libfabric)
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*
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* LICENSE_BEGIN
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*
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* BSD license:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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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
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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* LICENSE_END
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*
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*
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*/
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#ifndef LIBNL1_UTILS_H
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#define LIBNL1_UTILS_H
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#include <linux/netlink.h>
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#include <linux/rtnetlink.h>
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#include <netlink/netlink.h>
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#include <netlink/route/rtnl.h>
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#include <netlink/route/route.h>
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typedef struct nl_handle NL_HANDLE;
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#define NLMSG_SIZE(size) nlmsg_msg_size(size)
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#define NL_GETERROR(err) nl_geterror()
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#define NL_HANDLE_ALLOC nl_handle_alloc
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#define NL_HANDLE_FREE nl_handle_destroy
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#define NL_DISABLE_SEQ_CHECK nl_disable_sequence_check
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#define INC_CB_MSGCNT(arg) \
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do { \
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arg->msg_cnt++; \
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} while (0)
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/*
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* the return value of nl_recvmsgs_default does not tell
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* whether it returns because of successful read or socket
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* timeout. This is a limitation in libnl1. So we compare
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* message count before and after the call to decide if there
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* is no new message arriving. In this case, this function
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* needs to terminate to prevent the caller from
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* blocking forever.
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* NL_CB_MSG_IN traps every received message, so
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* there should be no premature exit
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*/
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#define NL_RECVMSGS(nlh, cb_arg, rc, err, out) \
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do { \
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int msg_cnt = cb_arg.msg_cnt; \
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err = nl_recvmsgs_default(nlh); \
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if (err < 0) { \
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opal_output(0, "Failed to receive netlink reply message, error %s\n", \
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NL_GETERROR(err)); \
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goto out; \
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} \
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if (msg_cnt == cb_arg.msg_cnt) {\
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err = rc; \
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goto out; \
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} \
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} while (0)
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struct usnic_rt_cb_arg {
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uint32_t nh_addr;
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int oif;
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int found;
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int msg_cnt;
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struct usnic_nl_sk *unlsk;
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};
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#endif /* LIBNL1_UTILS_H */
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