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Diffstat (limited to 'src/platform/linux/platform-linux.h')
| -rw-r--r-- | src/platform/linux/platform-linux.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/src/platform/linux/platform-linux.h b/src/platform/linux/platform-linux.h new file mode 100644 index 0000000..978daf1 --- /dev/null +++ b/src/platform/linux/platform-linux.h @@ -0,0 +1,174 @@ +/*-------------------------------------------------------------------- + * Copyright © 2016 James Hunt <jamesodhunt@ubuntu.com>. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * 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, see <http://www.gnu.org/licenses/>. + *-------------------------------------------------------------------- + */ + +#ifndef _PROCENV_PLATFORM_LINUX_H +#define _PROCENV_PLATFORM_LINUX_H + +/* required for sched_getcpu() (from sched.h) */ +#define _GNU_SOURCE + +#include "platform.h" +#include "util.h" + +#define ROOT_PATH "/proc/self/root" + +#if defined (HAVE_NUMA_H) + +#include <numa.h> +#include <numaif.h> + +#if LIBNUMA_API_VERSION == 2 +#define PROCENV_NUMA_BITMASK_ISSET(mask, node) numa_bitmask_isbitset ((mask), (node)) +#else +#define PROCENV_NUMA_BITMASK_ISSET(mask, node) nodemask_isset (&(mask), (node)) +#endif +#endif /* HAVE_NUMA_H */ + +/** + * LINUX_KERNEL_M: + * @major: Linux major kernel version number. + * + * Returns: true if running Linux kernel is atleast at version + * specified by @major else false. + **/ +#define LINUX_KERNEL_M(major) \ + (linux_kernel_version (major, -1, -1)) + +/** + * LINUX_KERNEL_MM: + * @major: Linux major kernel version number, + * @minor: Linux minor kernel version number. + * + * Returns: true if running Linux kernel is atleast at version + * specified by (@major, @minor) else false. + **/ +#define LINUX_KERNEL_MM(major, minor) \ + (linux_kernel_version (major, minor, -1)) + +/** + * LINUX_KERNEL_MMR: + * @major: Linux major kernel version number, + * @minor: Linux minor kernel version number, + * @revision: kernel revision version. + * + * Returns: true if running Linux kernel is atleast at version + * specified by (@major, @minor, @revision) else false. + **/ +#define LINUX_KERNEL_MMR(major, minor, revision) \ + (linux_kernel_version (major, minor, revision)) + +/** + * show_capability: + * @caps: cap_t, + * @cap: capability. + * + * Display specified capability, or NOT_DEFINED_STR if value is + * unknown. + **/ +#ifdef PR_CAPBSET_READ +#define show_capability(caps, cap) \ + _show_capability (caps, cap, #cap) + +#define _show_capability(caps, cap, name) \ +{ \ + int bound; \ + int effective; \ + int inheritable; \ + int permitted; \ + \ + bound = cap_get_bound (cap); \ + \ + effective = get_capability_by_flag_type (caps, CAP_EFFECTIVE, cap); \ + inheritable = get_capability_by_flag_type (caps, CAP_INHERITABLE, cap); \ + permitted = get_capability_by_flag_type (caps, CAP_PERMITTED, cap); \ + \ + section_open (name); \ + \ + entry ("number", "%d", cap); \ + \ + entry ("supported", "%s", \ + CAP_IS_SUPPORTED (cap) \ + ? YES_STR : NO_STR); \ + \ + entry ("in bounding set", "%s", \ + bound < 0 \ + ? UNKNOWN_STR \ + : bound \ + ? YES_STR \ + : NO_STR); \ + \ + entry ("effective", "%s", \ + effective < 0 \ + ? NOT_DEFINED_STR \ + : effective == CAP_SET \ + ? YES_STR \ + : NO_STR); \ + \ + entry ("inheritable", "%s", \ + inheritable < 0 \ + ? NOT_DEFINED_STR \ + : inheritable == CAP_SET \ + ? YES_STR \ + : NO_STR); \ + \ + entry ("permitted", "%s", \ + permitted < 0 \ + ? NOT_DEFINED_STR \ + : permitted == CAP_SET \ + ? YES_STR \ + : NO_STR); \ + \ + section_close (); \ +} +#else +#define show_capability(caps, cap) +#endif + +#if defined (HAVE_SYS_CAPABILITY_H) + +#ifndef CAP_IS_SUPPORTED + +static int cap_get_bound (cap_value_t cap) + __attribute__((unused)); + +#define CAP_IS_SUPPORTED(cap) (cap_get_bound (cap) >= 0) +#define PROCENV_NEED_LOCAL_CAP_GET_BOUND + +#endif /* CAP_IS_SUPPORTED */ + +#endif /* HAVE_SYS_CAPABILITY_H */ + +/* semctl(2) states that POSIX.1-2001 requires the caller define this! */ +union semun { + int val; + struct semid_ds *buf; + unsigned short int *array; + struct seminfo *__buf; +}; + +static bool linux_kernel_version (int major, int minor, int revision); + +static int get_capability_by_flag_type (cap_t cap_p, cap_flag_t type, cap_value_t cap) + __attribute__((unused)); + +#if defined (HAVE_SYS_CAPABILITY_H) +int get_capability_by_flag_type (cap_t cap_p, cap_flag_t type, cap_value_t cap); +#endif /* HAVE_SYS_CAPABILITY_H */ + + +#endif /* _PROCENV_PLATFORM_LINUX_H */ |