mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-21 09:24:37 +07:00
f57a19a7bc
This is useful in the future and allows users to better understand the reasoning behind the changes. Also use UL as we're dealing with it anyways. Signed-off-by: Davidlohr Bueso <davidlohr@hp.com> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
81 lines
2.6 KiB
C
81 lines
2.6 KiB
C
#ifndef _UAPI_LINUX_SHM_H_
|
|
#define _UAPI_LINUX_SHM_H_
|
|
|
|
#include <linux/ipc.h>
|
|
#include <linux/errno.h>
|
|
#ifndef __KERNEL__
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
/*
|
|
* SHMMNI, SHMMAX and SHMALL are default upper limits which can be
|
|
* modified by sysctl. The SHMMAX and SHMALL values have been chosen to
|
|
* be as large possible without facilitating scenarios where userspace
|
|
* causes overflows when adjusting the limits via operations of the form
|
|
* "retrieve current limit; add X; update limit". It is therefore not
|
|
* advised to make SHMMAX and SHMALL any larger. These limits are
|
|
* suitable for both 32 and 64-bit systems.
|
|
*/
|
|
#define SHMMIN 1 /* min shared seg size (bytes) */
|
|
#define SHMMNI 4096 /* max num of segs system wide */
|
|
#define SHMMAX (ULONG_MAX - (1UL << 24)) /* max shared seg size (bytes) */
|
|
#define SHMALL (ULONG_MAX - (1UL << 24)) /* max shm system wide (pages) */
|
|
#define SHMSEG SHMMNI /* max shared segs per process */
|
|
|
|
/* Obsolete, used only for backwards compatibility and libc5 compiles */
|
|
struct shmid_ds {
|
|
struct ipc_perm shm_perm; /* operation perms */
|
|
int shm_segsz; /* size of segment (bytes) */
|
|
__kernel_time_t shm_atime; /* last attach time */
|
|
__kernel_time_t shm_dtime; /* last detach time */
|
|
__kernel_time_t shm_ctime; /* last change time */
|
|
__kernel_ipc_pid_t shm_cpid; /* pid of creator */
|
|
__kernel_ipc_pid_t shm_lpid; /* pid of last operator */
|
|
unsigned short shm_nattch; /* no. of current attaches */
|
|
unsigned short shm_unused; /* compatibility */
|
|
void *shm_unused2; /* ditto - used by DIPC */
|
|
void *shm_unused3; /* unused */
|
|
};
|
|
|
|
/* Include the definition of shmid64_ds and shminfo64 */
|
|
#include <asm/shmbuf.h>
|
|
|
|
/* permission flag for shmget */
|
|
#define SHM_R 0400 /* or S_IRUGO from <linux/stat.h> */
|
|
#define SHM_W 0200 /* or S_IWUGO from <linux/stat.h> */
|
|
|
|
/* mode for attach */
|
|
#define SHM_RDONLY 010000 /* read-only access */
|
|
#define SHM_RND 020000 /* round attach address to SHMLBA boundary */
|
|
#define SHM_REMAP 040000 /* take-over region on attach */
|
|
#define SHM_EXEC 0100000 /* execution access */
|
|
|
|
/* super user shmctl commands */
|
|
#define SHM_LOCK 11
|
|
#define SHM_UNLOCK 12
|
|
|
|
/* ipcs ctl commands */
|
|
#define SHM_STAT 13
|
|
#define SHM_INFO 14
|
|
|
|
/* Obsolete, used only for backwards compatibility */
|
|
struct shminfo {
|
|
int shmmax;
|
|
int shmmin;
|
|
int shmmni;
|
|
int shmseg;
|
|
int shmall;
|
|
};
|
|
|
|
struct shm_info {
|
|
int used_ids;
|
|
__kernel_ulong_t shm_tot; /* total allocated shm */
|
|
__kernel_ulong_t shm_rss; /* total resident shm */
|
|
__kernel_ulong_t shm_swp; /* total swapped shm */
|
|
__kernel_ulong_t swap_attempts;
|
|
__kernel_ulong_t swap_successes;
|
|
};
|
|
|
|
|
|
#endif /* _UAPI_LINUX_SHM_H_ */
|