If multiple threads are invoking "ifconfig XXX create" a race may occur which can lead to two different error messages for the same error. a) ifconfig: SIOCIFCREATE2: File exists b) ifconfig: interface XXX already exists This patch ensures ifconfig prints the same error code for the same case. Reviewed by: imp@ and kib@ Differential Revision: https://reviews.freebsd.org/D27380 MFC after: 1 week Sponsored by: Mellanox Technologies // NVIDIA Networking
164 lines
5.6 KiB
C
164 lines
5.6 KiB
C
/*-
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* SPDX-License-Identifier: BSD-4-Clause
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*
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* Copyright (c) 1997 Peter Wemm.
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* All rights reserved.
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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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* 1. 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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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed for the FreeBSD Project
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* by Peter Wemm.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR 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 CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* so there!
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*
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* $FreeBSD$
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*/
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#define __constructor __attribute__((constructor))
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struct afswtch;
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struct cmd;
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typedef void c_func(const char *cmd, int arg, int s, const struct afswtch *afp);
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typedef void c_func2(const char *arg1, const char *arg2, int s, const struct afswtch *afp);
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struct cmd {
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const char *c_name;
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int c_parameter;
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#define NEXTARG 0xffffff /* has following arg */
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#define NEXTARG2 0xfffffe /* has 2 following args */
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#define OPTARG 0xfffffd /* has optional following arg */
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union {
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c_func *c_func;
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c_func2 *c_func2;
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} c_u;
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int c_iscloneop;
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struct cmd *c_next;
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};
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void cmd_register(struct cmd *);
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typedef void callback_func(int s, void *);
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void callback_register(callback_func *, void *);
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/*
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* Macros for declaring command functions and initializing entries.
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*/
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#define DECL_CMD_FUNC(name, cmd, arg) \
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void name(const char *cmd, int arg, int s, const struct afswtch *afp)
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#define DECL_CMD_FUNC2(name, arg1, arg2) \
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void name(const char *arg1, const char *arg2, int s, const struct afswtch *afp)
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#define DEF_CMD(name, param, func) { name, param, { .c_func = func }, 0, NULL }
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#define DEF_CMD_ARG(name, func) { name, NEXTARG, { .c_func = func }, 0, NULL }
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#define DEF_CMD_OPTARG(name, func) { name, OPTARG, { .c_func = func }, 0, NULL }
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#define DEF_CMD_ARG2(name, func) { name, NEXTARG2, { .c_func2 = func }, 0, NULL }
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#define DEF_CLONE_CMD(name, param, func) { name, param, { .c_func = func }, 1, NULL }
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#define DEF_CLONE_CMD_ARG(name, func) { name, NEXTARG, { .c_func = func }, 1, NULL }
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#define DEF_CLONE_CMD_ARG2(name, func) { name, NEXTARG2, { .c_func2 = func }, 1, NULL }
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struct ifaddrs;
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struct addrinfo;
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enum {
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RIDADDR,
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ADDR,
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MASK,
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DSTADDR,
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};
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struct afswtch {
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const char *af_name; /* as given on cmd line, e.g. "inet" */
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short af_af; /* AF_* */
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/*
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* Status is handled one of two ways; if there is an
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* address associated with the interface then the
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* associated address family af_status method is invoked
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* with the appropriate addressin info. Otherwise, if
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* all possible info is to be displayed and af_other_status
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* is defined then it is invoked after all address status
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* is presented.
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*/
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void (*af_status)(int, const struct ifaddrs *);
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void (*af_other_status)(int);
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/* parse address method */
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void (*af_getaddr)(const char *, int);
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/* parse prefix method (IPv6) */
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void (*af_getprefix)(const char *, int);
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void (*af_postproc)(int s, const struct afswtch *);
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u_long af_difaddr; /* set dst if address ioctl */
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u_long af_aifaddr; /* set if address ioctl */
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void *af_ridreq; /* */
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void *af_addreq; /* */
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struct afswtch *af_next;
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/* XXX doesn't fit model */
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void (*af_status_tunnel)(int);
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void (*af_settunnel)(int s, struct addrinfo *srcres,
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struct addrinfo *dstres);
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};
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void af_register(struct afswtch *);
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struct option {
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const char *opt;
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const char *opt_usage;
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void (*cb)(const char *arg);
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struct option *next;
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};
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void opt_register(struct option *);
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extern struct ifreq ifr;
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extern char name[IFNAMSIZ]; /* name of interface */
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extern int allmedia;
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extern int supmedia;
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extern int printkeys;
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extern int newaddr;
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extern int verbose;
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extern int printifname;
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extern int exit_code;
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void setifcap(const char *, int value, int s, const struct afswtch *);
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void Perror(const char *cmd);
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void printb(const char *s, unsigned value, const char *bits);
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void ifmaybeload(const char *name);
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typedef int clone_match_func(const char *);
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typedef void clone_callback_func(int, struct ifreq *);
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void clone_setdefcallback_prefix(const char *, clone_callback_func *);
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void clone_setdefcallback_filter(clone_match_func *, clone_callback_func *);
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void sfp_status(int s, struct ifreq *ifr, int verbose);
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/*
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* XXX expose this so modules that neeed to know of any pending
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* operations on ifmedia can avoid cmd line ordering confusion.
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*/
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struct ifmediareq *ifmedia_getstate(int s);
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void print_vhid(const struct ifaddrs *, const char *);
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void ioctl_ifcreate(int s, struct ifreq *);
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