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2f368e4a ZJS |
1 | #pragma once |
2 | ||
3 | /*** | |
4 | This file is part of systemd. | |
5 | ||
6 | Copyright 2010 Lennart Poettering | |
7 | Copyright 2016 Zbigniew Jędrzejewski-Szmek | |
8 | ||
9 | systemd is free software; you can redistribute it and/or modify it | |
10 | under the terms of the GNU Lesser General Public License as published by | |
11 | the Free Software Foundation; either version 2.1 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | systemd is distributed in the hope that it will be useful, but | |
15 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | Lesser General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU Lesser General Public License | |
20 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
21 | ***/ | |
22 | ||
23 | /* Missing glibc definitions to access certain kernel APIs */ | |
24 | ||
25 | #if !HAVE_DECL_PIVOT_ROOT | |
26 | static inline int pivot_root(const char *new_root, const char *put_old) { | |
27 | return syscall(SYS_pivot_root, new_root, put_old); | |
28 | } | |
29 | #endif | |
30 | ||
31 | /* ======================================================================= */ | |
32 | ||
33 | #if !HAVE_DECL_MEMFD_CREATE | |
34 | # ifndef __NR_memfd_create | |
35 | # if defined __x86_64__ | |
36 | # define __NR_memfd_create 319 | |
37 | # elif defined __arm__ | |
38 | # define __NR_memfd_create 385 | |
39 | # elif defined __aarch64__ | |
40 | # define __NR_memfd_create 279 | |
41 | # elif defined __s390__ | |
42 | # define __NR_memfd_create 350 | |
43 | # elif defined _MIPS_SIM | |
44 | # if _MIPS_SIM == _MIPS_SIM_ABI32 | |
45 | # define __NR_memfd_create 4354 | |
46 | # endif | |
47 | # if _MIPS_SIM == _MIPS_SIM_NABI32 | |
48 | # define __NR_memfd_create 6318 | |
49 | # endif | |
50 | # if _MIPS_SIM == _MIPS_SIM_ABI64 | |
51 | # define __NR_memfd_create 5314 | |
52 | # endif | |
53 | # elif defined __i386__ | |
54 | # define __NR_memfd_create 356 | |
55 | # else | |
56 | # warning "__NR_memfd_create unknown for your architecture" | |
57 | # endif | |
58 | # endif | |
59 | ||
60 | static inline int memfd_create(const char *name, unsigned int flags) { | |
61 | # ifdef __NR_memfd_create | |
62 | return syscall(__NR_memfd_create, name, flags); | |
63 | # else | |
64 | errno = ENOSYS; | |
65 | return -1; | |
66 | # endif | |
67 | } | |
68 | #endif | |
69 | ||
70 | /* ======================================================================= */ | |
71 | ||
72 | #if !HAVE_DECL_GETRANDOM | |
73 | # ifndef __NR_getrandom | |
74 | # if defined __x86_64__ | |
75 | # define __NR_getrandom 318 | |
76 | # elif defined(__i386__) | |
77 | # define __NR_getrandom 355 | |
78 | # elif defined(__arm__) | |
79 | # define __NR_getrandom 384 | |
80 | # elif defined(__aarch64__) | |
81 | # define __NR_getrandom 278 | |
82 | # elif defined(__ia64__) | |
83 | # define __NR_getrandom 1339 | |
84 | # elif defined(__m68k__) | |
85 | # define __NR_getrandom 352 | |
86 | # elif defined(__s390x__) | |
87 | # define __NR_getrandom 349 | |
88 | # elif defined(__powerpc__) | |
89 | # define __NR_getrandom 359 | |
90 | # elif defined _MIPS_SIM | |
91 | # if _MIPS_SIM == _MIPS_SIM_ABI32 | |
92 | # define __NR_getrandom 4353 | |
93 | # endif | |
94 | # if _MIPS_SIM == _MIPS_SIM_NABI32 | |
95 | # define __NR_getrandom 6317 | |
96 | # endif | |
97 | # if _MIPS_SIM == _MIPS_SIM_ABI64 | |
98 | # define __NR_getrandom 5313 | |
99 | # endif | |
100 | # else | |
101 | # warning "__NR_getrandom unknown for your architecture" | |
102 | # endif | |
103 | # endif | |
104 | ||
105 | static inline int getrandom(void *buffer, size_t count, unsigned flags) { | |
106 | # ifdef __NR_getrandom | |
107 | return syscall(__NR_getrandom, buffer, count, flags); | |
108 | # else | |
109 | errno = ENOSYS; | |
110 | return -1; | |
111 | # endif | |
112 | } | |
113 | #endif | |
114 | ||
115 | /* ======================================================================= */ | |
116 | ||
117 | #if !HAVE_DECL_GETTID | |
118 | static inline pid_t gettid(void) { | |
119 | return (pid_t) syscall(SYS_gettid); | |
120 | } | |
121 | #endif | |
122 | ||
123 | /* ======================================================================= */ | |
124 | ||
125 | #if !HAVE_DECL_NAME_TO_HANDLE_AT | |
126 | # ifndef __NR_name_to_handle_at | |
127 | # if defined(__x86_64__) | |
128 | # define __NR_name_to_handle_at 303 | |
129 | # elif defined(__i386__) | |
130 | # define __NR_name_to_handle_at 341 | |
131 | # elif defined(__arm__) | |
132 | # define __NR_name_to_handle_at 370 | |
133 | # elif defined(__powerpc__) | |
134 | # define __NR_name_to_handle_at 345 | |
135 | # else | |
136 | # error "__NR_name_to_handle_at is not defined" | |
137 | # endif | |
138 | # endif | |
139 | ||
140 | struct file_handle { | |
141 | unsigned int handle_bytes; | |
142 | int handle_type; | |
143 | unsigned char f_handle[0]; | |
144 | }; | |
145 | ||
146 | static inline int name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) { | |
147 | # ifdef __NR_name_to_handle_at | |
148 | return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags); | |
149 | # else | |
150 | errno = ENOSYS; | |
151 | return -1; | |
152 | # endif | |
153 | } | |
154 | #endif | |
155 | ||
156 | /* ======================================================================= */ | |
157 | ||
158 | #if !HAVE_DECL_SETNS | |
159 | # ifndef __NR_setns | |
160 | # if defined(__x86_64__) | |
161 | # define __NR_setns 308 | |
162 | # elif defined(__i386__) | |
163 | # define __NR_setns 346 | |
164 | # else | |
165 | # error "__NR_setns is not defined" | |
166 | # endif | |
167 | # endif | |
168 | ||
169 | static inline int setns(int fd, int nstype) { | |
170 | # ifdef __NR_setns | |
171 | return syscall(__NR_setns, fd, nstype); | |
172 | # else | |
173 | errno = ENOSYS; | |
174 | return -1; | |
175 | # endif | |
176 | } | |
177 | #endif | |
178 | ||
179 | /* ======================================================================= */ | |
180 | ||
2f368e4a ZJS |
181 | static inline pid_t raw_getpid(void) { |
182 | #if defined(__alpha__) | |
183 | return (pid_t) syscall(__NR_getxpid); | |
184 | #else | |
185 | return (pid_t) syscall(__NR_getpid); | |
186 | #endif | |
187 | } | |
188 | ||
189 | /* ======================================================================= */ | |
190 | ||
191 | #if !HAVE_DECL_RENAMEAT2 | |
192 | # ifndef __NR_renameat2 | |
193 | # if defined __x86_64__ | |
194 | # define __NR_renameat2 316 | |
195 | # elif defined __arm__ | |
196 | # define __NR_renameat2 382 | |
197 | # elif defined _MIPS_SIM | |
198 | # if _MIPS_SIM == _MIPS_SIM_ABI32 | |
199 | # define __NR_renameat2 4351 | |
200 | # endif | |
201 | # if _MIPS_SIM == _MIPS_SIM_NABI32 | |
202 | # define __NR_renameat2 6315 | |
203 | # endif | |
204 | # if _MIPS_SIM == _MIPS_SIM_ABI64 | |
205 | # define __NR_renameat2 5311 | |
206 | # endif | |
207 | # elif defined __i386__ | |
208 | # define __NR_renameat2 353 | |
209 | # else | |
210 | # warning "__NR_renameat2 unknown for your architecture" | |
211 | # endif | |
212 | # endif | |
213 | ||
214 | static inline int renameat2(int oldfd, const char *oldname, int newfd, const char *newname, unsigned flags) { | |
215 | # ifdef __NR_renameat2 | |
216 | return syscall(__NR_renameat2, oldfd, oldname, newfd, newname, flags); | |
217 | # else | |
218 | errno = ENOSYS; | |
219 | return -1; | |
220 | # endif | |
221 | } | |
222 | #endif | |
223 | ||
224 | /* ======================================================================= */ | |
225 | ||
226 | #if !HAVE_DECL_KCMP | |
227 | static inline int kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) { | |
228 | # ifdef __NR_kcmp | |
229 | return syscall(__NR_kcmp, pid1, pid2, type, idx1, idx2); | |
230 | # else | |
231 | errno = ENOSYS; | |
232 | return -1; | |
233 | # endif | |
234 | } | |
235 | #endif | |
236 | ||
237 | /* ======================================================================= */ | |
238 | ||
239 | #if !HAVE_DECL_KEYCTL | |
240 | static inline long keyctl(int cmd, unsigned long arg2, unsigned long arg3, unsigned long arg4,unsigned long arg5) { | |
241 | # ifdef __NR_keyctl | |
242 | return syscall(__NR_keyctl, cmd, arg2, arg3, arg4, arg5); | |
243 | # else | |
244 | errno = ENOSYS; | |
245 | return -1; | |
246 | # endif | |
247 | } | |
248 | ||
249 | static inline key_serial_t add_key(const char *type, const char *description, const void *payload, size_t plen, key_serial_t ringid) { | |
250 | # ifdef __NR_add_key | |
251 | return syscall(__NR_add_key, type, description, payload, plen, ringid); | |
252 | # else | |
253 | errno = ENOSYS; | |
254 | return -1; | |
255 | # endif | |
256 | } | |
257 | ||
258 | static inline key_serial_t request_key(const char *type, const char *description, const char * callout_info, key_serial_t destringid) { | |
259 | # ifdef __NR_request_key | |
260 | return syscall(__NR_request_key, type, description, callout_info, destringid); | |
261 | # else | |
262 | errno = ENOSYS; | |
263 | return -1; | |
264 | # endif | |
265 | } | |
266 | #endif | |
267 | ||
268 | /* ======================================================================= */ | |
269 | ||
270 | #if !HAVE_DECL_COPY_FILE_RANGE | |
271 | # ifndef __NR_copy_file_range | |
272 | # if defined(__x86_64__) | |
273 | # define __NR_copy_file_range 326 | |
274 | # elif defined(__i386__) | |
275 | # define __NR_copy_file_range 377 | |
276 | # elif defined __s390__ | |
277 | # define __NR_copy_file_range 375 | |
278 | # elif defined __arm__ | |
279 | # define __NR_copy_file_range 391 | |
280 | # elif defined __aarch64__ | |
281 | # define __NR_copy_file_range 285 | |
4d07c8d3 AIB |
282 | # elif defined __powerpc__ |
283 | # define __NR_copy_file_range 379 | |
2f368e4a ZJS |
284 | # else |
285 | # warning "__NR_copy_file_range not defined for your architecture" | |
286 | # endif | |
287 | # endif | |
288 | ||
289 | static inline ssize_t copy_file_range(int fd_in, loff_t *off_in, | |
290 | int fd_out, loff_t *off_out, | |
291 | size_t len, | |
292 | unsigned int flags) { | |
293 | # ifdef __NR_copy_file_range | |
294 | return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags); | |
295 | # else | |
296 | errno = ENOSYS; | |
297 | return -1; | |
298 | # endif | |
299 | } | |
300 | #endif |