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This allows us to use a bunch of macros in our static build for init.lxc.static
without having to link against all of utils.{c,h}.
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>- Loading branch information
Christian Brauner
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Aug 12, 2018
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,139 @@ | ||
| /* liblxcapi | ||
| * | ||
| * Copyright © 2018 Christian Brauner <christian.brauner@ubuntu.com>. | ||
| * Copyright © 2018 Canonical Ltd. | ||
| * | ||
| * This program is free software; you can redistribute it and/or modify | ||
| * it under the terms of the GNU General Public License version 2, as | ||
| * published by the Free Software Foundation. | ||
| * | ||
| * This program is distributed in the hope that it will be useful, | ||
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| * GNU General Public License for more details. | ||
| * | ||
| * You should have received a copy of the GNU General Public License along | ||
| * with this program; if not, write to the Free Software Foundation, Inc., | ||
| * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| */ | ||
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|
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| #ifndef __LXC_MACRO_H | ||
| #define __LXC_MACRO_H | ||
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| /* Define __S_ISTYPE if missing from the C library. */ | ||
| #ifndef __S_ISTYPE | ||
| #define __S_ISTYPE(mode, mask) (((mode)&S_IFMT) == (mask)) | ||
| #endif | ||
|
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| #if HAVE_LIBCAP | ||
| #ifndef CAP_SETFCAP | ||
| #define CAP_SETFCAP 31 | ||
| #endif | ||
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| #ifndef CAP_MAC_OVERRIDE | ||
| #define CAP_MAC_OVERRIDE 32 | ||
| #endif | ||
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| #ifndef CAP_MAC_ADMIN | ||
| #define CAP_MAC_ADMIN 33 | ||
| #endif | ||
| #endif | ||
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| #ifndef PR_CAPBSET_DROP | ||
| #define PR_CAPBSET_DROP 24 | ||
| #endif | ||
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| #ifndef LO_FLAGS_AUTOCLEAR | ||
| #define LO_FLAGS_AUTOCLEAR 4 | ||
| #endif | ||
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| #ifndef CAP_SETUID | ||
| #define CAP_SETUID 7 | ||
| #endif | ||
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| #ifndef CAP_SETGID | ||
| #define CAP_SETGID 6 | ||
| #endif | ||
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| /* needed for cgroup automount checks, regardless of whether we | ||
| * have included linux/capability.h or not */ | ||
| #ifndef CAP_SYS_ADMIN | ||
| #define CAP_SYS_ADMIN 21 | ||
| #endif | ||
|
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| #ifndef CGROUP_SUPER_MAGIC | ||
| #define CGROUP_SUPER_MAGIC 0x27e0eb | ||
| #endif | ||
|
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| #ifndef CGROUP2_SUPER_MAGIC | ||
| #define CGROUP2_SUPER_MAGIC 0x63677270 | ||
| #endif | ||
|
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| /* Useful macros */ | ||
| /* Maximum number for 64 bit integer is a string with 21 digits: 2^64 - 1 = 21 */ | ||
| #define LXC_NUMSTRLEN64 21 | ||
| #define LXC_LINELEN 4096 | ||
| #define LXC_IDMAPLEN 4096 | ||
| #define LXC_MAX_BUFFER 4096 | ||
| /* /proc/ = 6 | ||
| * + | ||
| * <pid-as-str> = LXC_NUMSTRLEN64 | ||
| * + | ||
| * /fd/ = 4 | ||
| * + | ||
| * <fd-as-str> = LXC_NUMSTRLEN64 | ||
| * + | ||
| * \0 = 1 | ||
| */ | ||
| #define LXC_PROC_PID_FD_LEN (6 + LXC_NUMSTRLEN64 + 4 + LXC_NUMSTRLEN64 + 1) | ||
|
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| /* loop devices */ | ||
| #ifndef LO_FLAGS_AUTOCLEAR | ||
| #define LO_FLAGS_AUTOCLEAR 4 | ||
| #endif | ||
|
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| #ifndef LOOP_CTL_GET_FREE | ||
| #define LOOP_CTL_GET_FREE 0x4C82 | ||
| #endif | ||
|
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| /* memfd_create() */ | ||
| #ifndef MFD_CLOEXEC | ||
| #define MFD_CLOEXEC 0x0001U | ||
| #endif | ||
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| #ifndef MFD_ALLOW_SEALING | ||
| #define MFD_ALLOW_SEALING 0x0002U | ||
| #endif | ||
|
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| /** | ||
| * BUILD_BUG_ON - break compile if a condition is true. | ||
| * @condition: the condition which the compiler should know is false. | ||
| * | ||
| * If you have some code which relies on certain constants being equal, or | ||
| * other compile-time-evaluated condition, you should use BUILD_BUG_ON to | ||
| * detect if someone changes it. | ||
| * | ||
| * The implementation uses gcc's reluctance to create a negative array, but | ||
| * gcc (as of 4.4) only emits that error for obvious cases (eg. not arguments | ||
| * to inline functions). So as a fallback we use the optimizer; if it can't | ||
| * prove the condition is false, it will cause a link error on the undefined | ||
| * "__build_bug_on_failed". This error message can be harder to track down | ||
| * though, hence the two different methods. | ||
| */ | ||
| #ifndef __OPTIMIZE__ | ||
| #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) | ||
| #else | ||
| extern int __build_bug_on_failed; | ||
| #define BUILD_BUG_ON(condition) \ | ||
| do { \ | ||
| ((void)sizeof(char[1 - 2*!!(condition)])); \ | ||
| if (condition) __build_bug_on_failed = 1; \ | ||
| } while(0) | ||
| #endif | ||
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| #define lxc_iterate_parts(__iterator, __splitme, __separators) \ | ||
| for (char *__p = NULL, *__it = strtok_r(__splitme, __separators, &__p); \ | ||
| (__iterator = __it); \ | ||
| __iterator = __it = strtok_r(NULL, __separators, &__p)) | ||
|
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| #endif /* __LXC_MACRO_H */ |
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