1 /*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1994 Christos Zoulas
5 * Copyright (c) 1995 Frank van der Linden
6 * Copyright (c) 1995 Scott Bartram
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. The name of the author may not be used to endorse or promote products
18 * derived from this software without specific prior written permission
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 *
31 * from: svr4_util.h,v 1.5 1994/11/18 02:54:31 christos Exp
32 * from: linux_util.h,v 1.2 1995/03/05 23:23:50 fvdl Exp
33 * $FreeBSD$
34 */
35
36 #ifndef _LINUX_UTIL_H_
37 #define _LINUX_UTIL_H_
38
39 #include <vm/vm.h>
40 #include <vm/vm_param.h>
41 #include <vm/pmap.h>
42 #include <sys/exec.h>
43 #include <sys/sysent.h>
44 #include <sys/syslog.h>
45 #include <sys/cdefs.h>
46 #include <sys/uio.h>
47
48 MALLOC_DECLARE(M_LINUX);
49 MALLOC_DECLARE(M_EPOLL);
50
51 extern char linux_emul_path[];
52 extern int linux_use_emul_path;
53
54 int linux_emul_convpath(const char *, enum uio_seg, char **, int, int);
55
56 #define LUSECONVPATH(td) atomic_load_int(&linux_use_emul_path)
57
58 #define LCONVPATH_AT(upath, pathp, i, dfd) \
59 do { \
60 int _error; \
61 \
62 _error = linux_emul_convpath(upath, UIO_USERSPACE, \
63 pathp, i, dfd); \
64 if (*(pathp) == NULL) \
65 return (_error); \
66 } while (0)
67
68 #define LCONVPATH(upath, pathp, i) \
69 LCONVPATH_AT(upath, pathp, i, AT_FDCWD)
70
71 #define LCONVPATHEXIST(upath, pathp) LCONVPATH(upath, pathp, 0)
72 #define LCONVPATHEXIST_AT(upath, pathp, dfd) LCONVPATH_AT(upath, pathp, 0, dfd)
73 #define LCONVPATHCREAT(upath, pathp) LCONVPATH(upath, pathp, 1)
74 #define LCONVPATHCREAT_AT(upath, pathp, dfd) LCONVPATH_AT(upath, pathp, 1, dfd)
75 #define LFREEPATH(path) free(path, M_TEMP)
76
77 #define DUMMY(s) \
78 LIN_SDT_PROBE_DEFINE0(dummy, s, not_implemented); \
79 int \
80 linux_ ## s(struct thread *td, struct linux_ ## s ## _args *args) \
81 { \
82 static pid_t pid; \
83 \
84 if (pid != td->td_proc->p_pid) { \
85 linux_msg(td, "syscall %s not implemented", #s); \
86 LIN_SDT_PROBE0(dummy, s, not_implemented); \
87 pid = td->td_proc->p_pid; \
88 }; \
89 \
90 return (ENOSYS); \
91 } \
92 struct __hack
93
94 /*
95 * This is for the syscalls that are not even yet implemented in Linux.
96 *
97 * They're marked as UNIMPL in syscall.master so it will
98 * have nosys record in linux_sysent[].
99 */
100 #define UNIMPLEMENTED(s)
101
102 void linux_msg(const struct thread *td, const char *fmt, ...)
103 __printflike(2, 3);
104
105 struct linux_device_handler {
106 char *bsd_driver_name;
107 char *linux_driver_name;
108 char *bsd_device_name;
109 char *linux_device_name;
110 int linux_major;
111 int linux_minor;
112 int linux_char_device;
113 };
114
115 int linux_device_register_handler(struct linux_device_handler *h);
116 int linux_device_unregister_handler(struct linux_device_handler *h);
117 char *linux_driver_get_name_dev(device_t dev);
118 int linux_driver_get_major_minor(const char *node, int *major, int *minor);
119 int linux_vn_get_major_minor(const struct vnode *vn, int *major, int *minor);
120 char *linux_get_char_devices(void);
121 void linux_free_get_char_devices(char *string);
122
123 /*
124 * Criteria for interface name translation
125 */
126 #define IFP_IS_ETH(ifp) ((ifp)->if_type == IFT_ETHER)
127 #define IFP_IS_LOOP(ifp) ((ifp)->if_type == IFT_LOOP)
128
129 struct ifnet;
130 bool linux_use_real_ifname(const struct ifnet *ifp);
131
132 #if defined(KTR)
133
134 #define KTR_LINUX KTR_SUBSYS
135 #define LINUX_CTRFMT(nm, fmt) #nm"("fmt")"
136
137 #define LINUX_CTR6(f, m, p1, p2, p3, p4, p5, p6) do { \
138 CTR6(KTR_LINUX, LINUX_CTRFMT(f, m), \
139 p1, p2, p3, p4, p5, p6); \
140 } while (0)
141
142 #define LINUX_CTR(f) LINUX_CTR6(f, "", 0, 0, 0, 0, 0, 0)
143 #define LINUX_CTR0(f, m) LINUX_CTR6(f, m, 0, 0, 0, 0, 0, 0)
144 #define LINUX_CTR1(f, m, p1) LINUX_CTR6(f, m, p1, 0, 0, 0, 0, 0)
145 #define LINUX_CTR2(f, m, p1, p2) LINUX_CTR6(f, m, p1, p2, 0, 0, 0, 0)
146 #define LINUX_CTR3(f, m, p1, p2, p3) LINUX_CTR6(f, m, p1, p2, p3, 0, 0, 0)
147 #define LINUX_CTR4(f, m, p1, p2, p3, p4) LINUX_CTR6(f, m, p1, p2, p3, p4, 0, 0)
148 #define LINUX_CTR5(f, m, p1, p2, p3, p4, p5) LINUX_CTR6(f, m, p1, p2, p3, p4, p5, 0)
149 #else
150 #define LINUX_CTR(f)
151 #define LINUX_CTR0(f, m)
152 #define LINUX_CTR1(f, m, p1)
153 #define LINUX_CTR2(f, m, p1, p2)
154 #define LINUX_CTR3(f, m, p1, p2, p3)
155 #define LINUX_CTR4(f, m, p1, p2, p3, p4)
156 #define LINUX_CTR5(f, m, p1, p2, p3, p4, p5)
157 #define LINUX_CTR6(f, m, p1, p2, p3, p4, p5, p6)
158 #endif
159
160 /*
161 * Some macros for rate limiting messages:
162 * - noisy if compat.linux.debug = 1
163 * - print only once if compat.linux.debug > 1
164 */
165 #define LINUX_RATELIMIT_MSG_NOTTESTED(_what) \
166 do { \
167 static int seen = 0; \
168 \
169 if (seen == 0 && linux_debug >= 2) { \
170 linux_msg(curthread, "%s is not tested, please report on emulation@FreeBSD.org how it works", _what); \
171 \
172 if (linux_debug < 3) \
173 seen = 1; \
174 } \
175 } while (0)
176
177 #define LINUX_RATELIMIT_MSG(_message) \
178 do { \
179 static int seen = 0; \
180 \
181 if (seen == 0) { \
182 linux_msg(curthread, _message); \
183 \
184 if (linux_debug < 3) \
185 seen = 1; \
186 } \
187 } while (0)
188
189 #define LINUX_RATELIMIT_MSG_OPT1(_message, _opt1) \
190 do { \
191 static int seen = 0; \
192 \
193 if (seen == 0) { \
194 linux_msg(curthread, _message, _opt1); \
195 \
196 if (linux_debug < 3) \
197 seen = 1; \
198 } \
199 } while (0)
200
201 #define LINUX_RATELIMIT_MSG_OPT2(_message, _opt1, _opt2) \
202 do { \
203 static int seen = 0; \
204 \
205 if (seen == 0) { \
206 linux_msg(curthread, _message, _opt1, _opt2); \
207 \
208 if (linux_debug < 3) \
209 seen = 1; \
210 } \
211 } while (0)
212
213 #endif /* ! _LINUX_UTIL_H_ */
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