2 * Copyright (c) 2015 Dmitry Chagin
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
31 #include <sys/systm.h>
32 #include <sys/ctype.h>
35 #include <sys/signalvar.h>
36 #include <sys/socket.h>
39 #include <net/if_var.h>
40 #include <net/if_dl.h>
41 #include <net/if_types.h>
43 #include <compat/linux/linux.h>
44 #include <compat/linux/linux_common.h>
46 CTASSERT(LINUX_IFNAMSIZ == IFNAMSIZ);
48 static int bsd_to_linux_sigtbl[LINUX_SIGTBLSZ] = {
49 LINUX_SIGHUP, /* SIGHUP */
50 LINUX_SIGINT, /* SIGINT */
51 LINUX_SIGQUIT, /* SIGQUIT */
52 LINUX_SIGILL, /* SIGILL */
53 LINUX_SIGTRAP, /* SIGTRAP */
54 LINUX_SIGABRT, /* SIGABRT */
56 LINUX_SIGFPE, /* SIGFPE */
57 LINUX_SIGKILL, /* SIGKILL */
58 LINUX_SIGBUS, /* SIGBUS */
59 LINUX_SIGSEGV, /* SIGSEGV */
60 LINUX_SIGSYS, /* SIGSYS */
61 LINUX_SIGPIPE, /* SIGPIPE */
62 LINUX_SIGALRM, /* SIGALRM */
63 LINUX_SIGTERM, /* SIGTERM */
64 LINUX_SIGURG, /* SIGURG */
65 LINUX_SIGSTOP, /* SIGSTOP */
66 LINUX_SIGTSTP, /* SIGTSTP */
67 LINUX_SIGCONT, /* SIGCONT */
68 LINUX_SIGCHLD, /* SIGCHLD */
69 LINUX_SIGTTIN, /* SIGTTIN */
70 LINUX_SIGTTOU, /* SIGTTOU */
71 LINUX_SIGIO, /* SIGIO */
72 LINUX_SIGXCPU, /* SIGXCPU */
73 LINUX_SIGXFSZ, /* SIGXFSZ */
74 LINUX_SIGVTALRM,/* SIGVTALRM */
75 LINUX_SIGPROF, /* SIGPROF */
76 LINUX_SIGWINCH, /* SIGWINCH */
78 LINUX_SIGUSR1, /* SIGUSR1 */
79 LINUX_SIGUSR2 /* SIGUSR2 */
82 static int linux_to_bsd_sigtbl[LINUX_SIGTBLSZ] = {
83 SIGHUP, /* LINUX_SIGHUP */
84 SIGINT, /* LINUX_SIGINT */
85 SIGQUIT, /* LINUX_SIGQUIT */
86 SIGILL, /* LINUX_SIGILL */
87 SIGTRAP, /* LINUX_SIGTRAP */
88 SIGABRT, /* LINUX_SIGABRT */
89 SIGBUS, /* LINUX_SIGBUS */
90 SIGFPE, /* LINUX_SIGFPE */
91 SIGKILL, /* LINUX_SIGKILL */
92 SIGUSR1, /* LINUX_SIGUSR1 */
93 SIGSEGV, /* LINUX_SIGSEGV */
94 SIGUSR2, /* LINUX_SIGUSR2 */
95 SIGPIPE, /* LINUX_SIGPIPE */
96 SIGALRM, /* LINUX_SIGALRM */
97 SIGTERM, /* LINUX_SIGTERM */
98 SIGBUS, /* LINUX_SIGSTKFLT */
99 SIGCHLD, /* LINUX_SIGCHLD */
100 SIGCONT, /* LINUX_SIGCONT */
101 SIGSTOP, /* LINUX_SIGSTOP */
102 SIGTSTP, /* LINUX_SIGTSTP */
103 SIGTTIN, /* LINUX_SIGTTIN */
104 SIGTTOU, /* LINUX_SIGTTOU */
105 SIGURG, /* LINUX_SIGURG */
106 SIGXCPU, /* LINUX_SIGXCPU */
107 SIGXFSZ, /* LINUX_SIGXFSZ */
108 SIGVTALRM, /* LINUX_SIGVTALARM */
109 SIGPROF, /* LINUX_SIGPROF */
110 SIGWINCH, /* LINUX_SIGWINCH */
111 SIGIO, /* LINUX_SIGIO */
113 * FreeBSD does not have SIGPWR signal, map Linux SIGPWR signal
114 * to the first unused FreeBSD signal number. Since Linux supports
115 * signals from 1 to 64 we are ok here as our SIGRTMIN = 65.
117 SIGRTMIN, /* LINUX_SIGPWR */
118 SIGSYS /* LINUX_SIGSYS */
122 * Map Linux RT signals to the FreeBSD RT signals.
125 linux_to_bsd_rt_signal(int sig)
128 return (SIGRTMIN + 1 + sig - LINUX_SIGRTMIN);
132 bsd_to_linux_rt_signal(int sig)
135 return (sig - SIGRTMIN - 1 + LINUX_SIGRTMIN);
139 linux_to_bsd_signal(int sig)
142 KASSERT(sig > 0 && sig <= LINUX_SIGRTMAX, ("invalid Linux signal %d\n", sig));
144 if (sig < LINUX_SIGRTMIN)
145 return (linux_to_bsd_sigtbl[_SIG_IDX(sig)]);
147 return (linux_to_bsd_rt_signal(sig));
151 bsd_to_linux_signal(int sig)
154 if (sig <= LINUX_SIGTBLSZ)
155 return (bsd_to_linux_sigtbl[_SIG_IDX(sig)]);
157 return (LINUX_SIGPWR);
159 return (bsd_to_linux_rt_signal(sig));
163 linux_to_bsd_sigaltstack(int lsa)
167 if (lsa & LINUX_SS_DISABLE)
170 * Linux ignores SS_ONSTACK flag for ss
171 * parameter while FreeBSD prohibits it.
177 bsd_to_linux_sigaltstack(int bsa)
181 if (bsa & SS_DISABLE)
182 lsa |= LINUX_SS_DISABLE;
183 if (bsa & SS_ONSTACK)
184 lsa |= LINUX_SS_ONSTACK;
189 linux_to_bsd_sigset(l_sigset_t *lss, sigset_t *bss)
194 for (l = 1; l <= LINUX_SIGRTMAX; l++) {
195 if (LINUX_SIGISMEMBER(*lss, l)) {
196 b = linux_to_bsd_signal(l);
204 bsd_to_linux_sigset(sigset_t *bss, l_sigset_t *lss)
208 LINUX_SIGEMPTYSET(*lss);
209 for (b = 1; b <= SIGRTMAX; b++) {
210 if (SIGISMEMBER(*bss, b)) {
211 l = bsd_to_linux_signal(b);
213 LINUX_SIGADDSET(*lss, l);
219 * Translate a Linux interface name to a FreeBSD interface name,
220 * and return the associated ifnet structure
221 * bsdname and lxname need to be least IFNAMSIZ bytes long, but
222 * can point to the same buffer.
225 ifname_linux_to_bsd(struct thread *td, const char *lxname, char *bsdname)
233 for (len = 0; len < LINUX_IFNAMSIZ; ++len)
234 if (!isalpha(lxname[len]) || lxname[len] == '\0')
236 if (len == 0 || len == LINUX_IFNAMSIZ)
238 /* Linux loopback interface name is lo (not lo0) */
239 is_lo = (len == 2 && strncmp(lxname, "lo", len) == 0);
240 unit = (int)strtoul(lxname + len, &ep, 10);
241 if ((ep == NULL || ep == lxname + len || ep >= lxname + LINUX_IFNAMSIZ) &&
245 is_eth = (len == 3 && strncmp(lxname, "eth", len) == 0);
247 CURVNET_SET(TD_TO_VNET(td));
249 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) {
251 * Allow Linux programs to use FreeBSD names. Don't presume
252 * we never have an interface named "eth", so don't make
253 * the test optional based on is_eth.
255 if (strncmp(ifp->if_xname, lxname, LINUX_IFNAMSIZ) == 0)
257 if (is_eth && IFP_IS_ETH(ifp) && unit == index++)
259 if (is_lo && IFP_IS_LOOP(ifp))
264 if (ifp != NULL && bsdname != NULL)
265 strlcpy(bsdname, ifp->if_xname, IFNAMSIZ);
270 linux_ifflags(struct ifnet *ifp, short *flags)
273 *flags = (ifp->if_flags | ifp->if_drv_flags) & 0xffff;
274 /* these flags have no Linux equivalent */
275 *flags &= ~(IFF_DRV_OACTIVE|IFF_SIMPLEX|
276 IFF_LINK0|IFF_LINK1|IFF_LINK2);
277 /* Linux' multicast flag is in a different bit */
278 if (*flags & IFF_MULTICAST) {
279 *flags &= ~IFF_MULTICAST;
285 linux_ifhwaddr(struct ifnet *ifp, struct l_sockaddr *lsa)
288 struct sockaddr_dl *sdl;
290 if (IFP_IS_LOOP(ifp)) {
291 bzero(lsa, sizeof(*lsa));
292 lsa->sa_family = LINUX_ARPHRD_LOOPBACK;
296 if (!IFP_IS_ETH(ifp))
299 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) {
300 sdl = (struct sockaddr_dl*)ifa->ifa_addr;
301 if (sdl != NULL && (sdl->sdl_family == AF_LINK) &&
302 (sdl->sdl_type == IFT_ETHER)) {
303 bzero(lsa, sizeof(*lsa));
304 lsa->sa_family = LINUX_ARPHRD_ETHER;
305 bcopy(LLADDR(sdl), lsa->sa_data, LINUX_IFHWADDRLEN);