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279c45ee CB |
1 | /* liblxcapi |
2 | * | |
3 | * Copyright © 2018 Christian Brauner <christian.brauner@ubuntu.com>. | |
4 | * Copyright © 2018 Canonical Ltd. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2, as | |
8 | * published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License along | |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 | */ | |
19 | ||
20 | #ifndef __LXC_MACRO_H | |
21 | #define __LXC_MACRO_H | |
22 | ||
85de58d6 CB |
23 | #include "config.h" |
24 | ||
25 | #include <asm/types.h> | |
26 | #include <linux/if_link.h> | |
27 | #include <linux/loop.h> | |
28 | #include <linux/netlink.h> | |
29 | #include <linux/rtnetlink.h> | |
938980ba | 30 | #include <linux/types.h> |
245532a2 | 31 | #include <stdint.h> |
2259663c | 32 | #include <string.h> |
85de58d6 CB |
33 | #include <sys/mount.h> |
34 | #include <sys/socket.h> | |
b1234129 | 35 | #include <sys/un.h> |
2955a58a | 36 | #include <unistd.h> |
85de58d6 | 37 | |
279c45ee CB |
38 | /* Define __S_ISTYPE if missing from the C library. */ |
39 | #ifndef __S_ISTYPE | |
40 | #define __S_ISTYPE(mode, mask) (((mode)&S_IFMT) == (mask)) | |
41 | #endif | |
42 | ||
ba2b6354 CB |
43 | /* capabilities */ |
44 | #ifndef CAP_SYS_ADMIN | |
45 | #define CAP_SYS_ADMIN 21 | |
46 | #endif | |
47 | ||
279c45ee CB |
48 | #ifndef CAP_SETFCAP |
49 | #define CAP_SETFCAP 31 | |
50 | #endif | |
51 | ||
52 | #ifndef CAP_MAC_OVERRIDE | |
53 | #define CAP_MAC_OVERRIDE 32 | |
54 | #endif | |
55 | ||
56 | #ifndef CAP_MAC_ADMIN | |
57 | #define CAP_MAC_ADMIN 33 | |
58 | #endif | |
279c45ee | 59 | |
279c45ee CB |
60 | #ifndef CAP_SETUID |
61 | #define CAP_SETUID 7 | |
62 | #endif | |
63 | ||
64 | #ifndef CAP_SETGID | |
65 | #define CAP_SETGID 6 | |
66 | #endif | |
67 | ||
ba2b6354 | 68 | /* prctl */ |
1f207a5c CB |
69 | #ifndef PR_CAPBSET_READ |
70 | #define PR_CAPBSET_READ 23 | |
71 | #endif | |
72 | ||
ba2b6354 | 73 | #ifndef PR_CAPBSET_DROP |
604ca1c0 CB |
74 | #define PR_CAPBSET_DROP 24 |
75 | #endif | |
76 | ||
1f207a5c CB |
77 | /* Control the ambient capability set */ |
78 | #ifndef PR_CAP_AMBIENT | |
79 | #define PR_CAP_AMBIENT 47 | |
80 | #endif | |
81 | ||
82 | #ifndef PR_CAP_AMBIENT_IS_SET | |
83 | #define PR_CAP_AMBIENT_IS_SET 1 | |
84 | #endif | |
85 | ||
86 | #ifndef PR_CAP_AMBIENT_RAISE | |
87 | #define PR_CAP_AMBIENT_RAISE 2 | |
88 | #endif | |
89 | ||
90 | #ifndef PR_CAP_AMBIENT_LOWER | |
91 | #define PR_CAP_AMBIENT_LOWER 3 | |
92 | #endif | |
93 | ||
94 | #ifndef PR_CAP_AMBIENT_CLEAR_ALL | |
95 | #define PR_CAP_AMBIENT_CLEAR_ALL 4 | |
96 | #endif | |
97 | ||
ba2b6354 | 98 | #ifndef PR_SET_NO_NEW_PRIVS |
604ca1c0 CB |
99 | #define PR_SET_NO_NEW_PRIVS 38 |
100 | #endif | |
101 | ||
ba2b6354 | 102 | #ifndef PR_GET_NO_NEW_PRIVS |
604ca1c0 CB |
103 | #define PR_GET_NO_NEW_PRIVS 39 |
104 | #endif | |
105 | ||
ba2b6354 | 106 | /* filesystem magic values */ |
279c45ee CB |
107 | #ifndef CGROUP_SUPER_MAGIC |
108 | #define CGROUP_SUPER_MAGIC 0x27e0eb | |
109 | #endif | |
110 | ||
111 | #ifndef CGROUP2_SUPER_MAGIC | |
112 | #define CGROUP2_SUPER_MAGIC 0x63677270 | |
113 | #endif | |
114 | ||
f26dc127 CB |
115 | #ifndef NSFS_MAGIC |
116 | #define NSFS_MAGIC 0x6e736673 | |
117 | #endif | |
118 | ||
ba2b6354 | 119 | /* current overlayfs */ |
37ef15bb CB |
120 | #ifndef OVERLAY_SUPER_MAGIC |
121 | #define OVERLAY_SUPER_MAGIC 0x794c7630 | |
122 | #endif | |
123 | ||
ba2b6354 CB |
124 | /* legacy overlayfs */ |
125 | #ifndef OVERLAYFS_SUPER_MAGIC | |
126 | #define OVERLAYFS_SUPER_MAGIC 0x794c764f | |
127 | #endif | |
128 | ||
f246d9b8 CB |
129 | /* Calculate the number of chars needed to represent a given integer as a C |
130 | * string. Include room for '-' to indicate negative numbers and the \0 byte. | |
131 | * This is based on systemd. | |
132 | */ | |
133 | #define INTTYPE_TO_STRLEN(type) \ | |
134 | (2 + (sizeof(type) <= 1 \ | |
135 | ? 3 \ | |
136 | : sizeof(type) <= 2 \ | |
137 | ? 5 \ | |
138 | : sizeof(type) <= 4 \ | |
139 | ? 10 \ | |
140 | : sizeof(type) <= 8 \ | |
141 | ? 20 \ | |
142 | : sizeof(int[-2 * (sizeof(type) > 8)]))) | |
143 | ||
279c45ee | 144 | /* Useful macros */ |
279c45ee CB |
145 | #define LXC_LINELEN 4096 |
146 | #define LXC_IDMAPLEN 4096 | |
147 | #define LXC_MAX_BUFFER 4096 | |
0c5ea884 | 148 | |
279c45ee CB |
149 | /* /proc/ = 6 |
150 | * + | |
0c5ea884 | 151 | * <pid-as-str> = INTTYPE_TO_STRLEN(pid_t) |
279c45ee CB |
152 | * + |
153 | * /fd/ = 4 | |
154 | * + | |
0c5ea884 | 155 | * <fd-as-str> = INTTYPE_TO_STRLEN(int) |
279c45ee CB |
156 | * + |
157 | * \0 = 1 | |
158 | */ | |
0c9b1f82 CB |
159 | #define LXC_PROC_PID_FD_LEN \ |
160 | (6 + INTTYPE_TO_STRLEN(pid_t) + 4 + INTTYPE_TO_STRLEN(int) + 1) | |
161 | ||
162 | /* /proc/ = 6 | |
163 | * + | |
164 | * <pid-as-str> = INTTYPE_TO_STRLEN(pid_t) | |
165 | * + | |
166 | * /status = 7 | |
167 | * + | |
168 | * \0 = 1 | |
169 | */ | |
170 | #define LXC_PROC_STATUS_LEN (6 + INTTYPE_TO_STRLEN(pid_t) + 7 + 1) | |
171 | ||
172 | /* /proc/ = 6 | |
173 | * + | |
174 | * <pid-as-str> = INTTYPE_TO_STRLEN(pid_t) | |
175 | * + | |
176 | * /attr/ = 6 | |
177 | * + | |
178 | * /current = 8 | |
179 | * + | |
180 | * \0 = 1 | |
181 | */ | |
182 | #define LXC_LSMATTRLEN (6 + INTTYPE_TO_STRLEN(pid_t) + 6 + 8 + 1) | |
0c5ea884 | 183 | |
9b8d4c58 | 184 | #define LXC_CMD_DATA_MAX (MAXPATHLEN * 2) |
279c45ee CB |
185 | |
186 | /* loop devices */ | |
187 | #ifndef LO_FLAGS_AUTOCLEAR | |
188 | #define LO_FLAGS_AUTOCLEAR 4 | |
189 | #endif | |
190 | ||
191 | #ifndef LOOP_CTL_GET_FREE | |
192 | #define LOOP_CTL_GET_FREE 0x4C82 | |
193 | #endif | |
194 | ||
195 | /* memfd_create() */ | |
196 | #ifndef MFD_CLOEXEC | |
197 | #define MFD_CLOEXEC 0x0001U | |
198 | #endif | |
199 | ||
200 | #ifndef MFD_ALLOW_SEALING | |
201 | #define MFD_ALLOW_SEALING 0x0002U | |
202 | #endif | |
203 | ||
204 | /** | |
205 | * BUILD_BUG_ON - break compile if a condition is true. | |
206 | * @condition: the condition which the compiler should know is false. | |
207 | * | |
208 | * If you have some code which relies on certain constants being equal, or | |
209 | * other compile-time-evaluated condition, you should use BUILD_BUG_ON to | |
210 | * detect if someone changes it. | |
211 | * | |
212 | * The implementation uses gcc's reluctance to create a negative array, but | |
213 | * gcc (as of 4.4) only emits that error for obvious cases (eg. not arguments | |
214 | * to inline functions). So as a fallback we use the optimizer; if it can't | |
215 | * prove the condition is false, it will cause a link error on the undefined | |
216 | * "__build_bug_on_failed". This error message can be harder to track down | |
217 | * though, hence the two different methods. | |
218 | */ | |
219 | #ifndef __OPTIMIZE__ | |
ba2b6354 | 220 | #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2 * !!(condition)])) |
279c45ee CB |
221 | #else |
222 | extern int __build_bug_on_failed; | |
ba2b6354 CB |
223 | #define BUILD_BUG_ON(condition) \ |
224 | do { \ | |
225 | ((void)sizeof(char[1 - 2 * !!(condition)])); \ | |
226 | if (condition) \ | |
227 | __build_bug_on_failed = 1; \ | |
228 | } while (0) | |
279c45ee CB |
229 | #endif |
230 | ||
231 | #define lxc_iterate_parts(__iterator, __splitme, __separators) \ | |
232 | for (char *__p = NULL, *__it = strtok_r(__splitme, __separators, &__p); \ | |
233 | (__iterator = __it); \ | |
234 | __iterator = __it = strtok_r(NULL, __separators, &__p)) | |
235 | ||
b81689a1 CB |
236 | #define prctl_arg(x) ((unsigned long)x) |
237 | ||
4fb34c04 CB |
238 | /* networking */ |
239 | #ifndef IFLA_LINKMODE | |
240 | #define IFLA_LINKMODE 17 | |
241 | #endif | |
242 | ||
243 | #ifndef IFLA_LINKINFO | |
244 | #define IFLA_LINKINFO 18 | |
245 | #endif | |
246 | ||
247 | #ifndef IFLA_NET_NS_PID | |
248 | #define IFLA_NET_NS_PID 19 | |
249 | #endif | |
250 | ||
251 | #ifndef IFLA_INFO_KIND | |
252 | #define IFLA_INFO_KIND 1 | |
253 | #endif | |
254 | ||
255 | #ifndef IFLA_VLAN_ID | |
256 | #define IFLA_VLAN_ID 1 | |
257 | #endif | |
258 | ||
259 | #ifndef IFLA_INFO_DATA | |
260 | #define IFLA_INFO_DATA 2 | |
261 | #endif | |
262 | ||
263 | #ifndef VETH_INFO_PEER | |
264 | #define VETH_INFO_PEER 1 | |
265 | #endif | |
266 | ||
267 | #ifndef IFLA_MACVLAN_MODE | |
268 | #define IFLA_MACVLAN_MODE 1 | |
269 | #endif | |
270 | ||
271 | #ifndef IFLA_NEW_NETNSID | |
272 | #define IFLA_NEW_NETNSID 45 | |
273 | #endif | |
274 | ||
275 | #ifndef IFLA_IF_NETNSID | |
276 | #define IFLA_IF_NETNSID 46 | |
277 | #endif | |
278 | ||
873c6e87 CB |
279 | #ifndef RTM_NEWNSID |
280 | #define RTM_NEWNSID 88 | |
281 | #endif | |
282 | ||
938980ba CB |
283 | #ifndef RTM_GETNSID |
284 | #define RTM_GETNSID 90 | |
285 | #endif | |
286 | ||
4e3ed0d1 CB |
287 | #ifndef NLMSG_ERROR |
288 | #define NLMSG_ERROR 0x2 | |
289 | #endif | |
290 | ||
7b15813c CB |
291 | #ifndef MACVLAN_MODE_PRIVATE |
292 | #define MACVLAN_MODE_PRIVATE 1 | |
293 | #endif | |
294 | ||
295 | #ifndef MACVLAN_MODE_VEPA | |
296 | #define MACVLAN_MODE_VEPA 2 | |
297 | #endif | |
298 | ||
299 | #ifndef MACVLAN_MODE_BRIDGE | |
300 | #define MACVLAN_MODE_BRIDGE 4 | |
301 | #endif | |
302 | ||
303 | #ifndef MACVLAN_MODE_PASSTHRU | |
304 | #define MACVLAN_MODE_PASSTHRU 8 | |
305 | #endif | |
306 | ||
b1234129 CB |
307 | /* Length of abstract unix domain socket socket address. */ |
308 | #define LXC_AUDS_ADDR_LEN sizeof(((struct sockaddr_un *)0)->sun_path) | |
309 | ||
c881c810 | 310 | /* mount */ |
6e5655e0 CB |
311 | #ifndef MS_PRIVATE |
312 | #define MS_PRIVATE (1<<18) | |
c881c810 CB |
313 | #endif |
314 | ||
315 | #ifndef MS_SLAVE | |
316 | #define MS_SLAVE (1 << 19) | |
317 | #endif | |
318 | ||
6e5655e0 CB |
319 | #ifndef MS_LAZYTIME |
320 | #define MS_LAZYTIME (1<<25) | |
321 | #endif | |
322 | ||
323 | #ifndef MS_REC | |
324 | #define MS_REC 16384 | |
325 | #endif | |
326 | ||
37ef15bb CB |
327 | /* open */ |
328 | #ifndef O_PATH | |
329 | #define O_PATH 010000000 | |
330 | #endif | |
331 | ||
332 | #ifndef O_NOFOLLOW | |
333 | #define O_NOFOLLOW 00400000 | |
334 | #endif | |
335 | ||
604ca1c0 CB |
336 | /* sockets */ |
337 | #ifndef SOCK_CLOEXEC | |
338 | #define SOCK_CLOEXEC 02000000 | |
339 | #endif | |
340 | ||
245532a2 CB |
341 | /* pointer conversion macros */ |
342 | #define PTR_TO_INT(p) ((int)((intptr_t)(p))) | |
343 | #define INT_TO_PTR(u) ((void *)((intptr_t)(u))) | |
344 | ||
9234406b CB |
345 | #define PTR_TO_INTMAX(p) ((intmax_t)((intptr_t)(p))) |
346 | #define INTMAX_TO_PTR(u) ((void *)((intptr_t)(u))) | |
347 | ||
b962868f CB |
348 | #define LXC_INVALID_UID ((uid_t)-1) |
349 | #define LXC_INVALID_GID ((gid_t)-1) | |
350 | ||
279c45ee | 351 | #endif /* __LXC_MACRO_H */ |