From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- include/uapi/linux/sem.h | 94 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 94 insertions(+) create mode 100644 include/uapi/linux/sem.h (limited to 'include/uapi/linux/sem.h') diff --git a/include/uapi/linux/sem.h b/include/uapi/linux/sem.h new file mode 100644 index 000000000..75aa3b273 --- /dev/null +++ b/include/uapi/linux/sem.h @@ -0,0 +1,94 @@ +/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ +#ifndef _UAPI_LINUX_SEM_H +#define _UAPI_LINUX_SEM_H + +#include + +/* semop flags */ +#define SEM_UNDO 0x1000 /* undo the operation on exit */ + +/* semctl Command Definitions. */ +#define GETPID 11 /* get sempid */ +#define GETVAL 12 /* get semval */ +#define GETALL 13 /* get all semval's */ +#define GETNCNT 14 /* get semncnt */ +#define GETZCNT 15 /* get semzcnt */ +#define SETVAL 16 /* set semval */ +#define SETALL 17 /* set all semval's */ + +/* ipcs ctl cmds */ +#define SEM_STAT 18 +#define SEM_INFO 19 +#define SEM_STAT_ANY 20 + +/* Obsolete, used only for backwards compatibility and libc5 compiles */ +struct semid_ds { + struct ipc_perm sem_perm; /* permissions .. see ipc.h */ + __kernel_old_time_t sem_otime; /* last semop time */ + __kernel_old_time_t sem_ctime; /* create/last semctl() time */ + struct sem *sem_base; /* ptr to first semaphore in array */ + struct sem_queue *sem_pending; /* pending operations to be processed */ + struct sem_queue **sem_pending_last; /* last pending operation */ + struct sem_undo *undo; /* undo requests on this array */ + unsigned short sem_nsems; /* no. of semaphores in array */ +}; + +/* Include the definition of semid64_ds */ +#include + +/* semop system calls takes an array of these. */ +struct sembuf { + unsigned short sem_num; /* semaphore index in array */ + short sem_op; /* semaphore operation */ + short sem_flg; /* operation flags */ +}; + +/* arg for semctl system calls. */ +union semun { + int val; /* value for SETVAL */ + struct semid_ds __user *buf; /* buffer for IPC_STAT & IPC_SET */ + unsigned short __user *array; /* array for GETALL & SETALL */ + struct seminfo __user *__buf; /* buffer for IPC_INFO */ + void __user *__pad; +}; + +struct seminfo { + int semmap; + int semmni; + int semmns; + int semmnu; + int semmsl; + int semopm; + int semume; + int semusz; + int semvmx; + int semaem; +}; + +/* + * SEMMNI, SEMMSL and SEMMNS are default values which can be + * modified by sysctl. + * The values has been chosen to be larger than necessary for any + * known configuration. + * + * SEMOPM should not be increased beyond 1000, otherwise there is the + * risk that semop()/semtimedop() fails due to kernel memory fragmentation when + * allocating the sop array. + */ + + +#define SEMMNI 32000 /* <= IPCMNI max # of semaphore identifiers */ +#define SEMMSL 32000 /* <= INT_MAX max num of semaphores per id */ +#define SEMMNS (SEMMNI*SEMMSL) /* <= INT_MAX max # of semaphores in system */ +#define SEMOPM 500 /* <= 1 000 max num of ops per semop call */ +#define SEMVMX 32767 /* <= 32767 semaphore maximum value */ +#define SEMAEM SEMVMX /* adjust on exit max value */ + +/* unused */ +#define SEMUME SEMOPM /* max num of undo entries per process */ +#define SEMMNU SEMMNS /* num of undo structures system wide */ +#define SEMMAP SEMMNS /* # of entries in semaphore map */ +#define SEMUSZ 20 /* sizeof struct sem_undo */ + + +#endif /* _UAPI_LINUX_SEM_H */ -- cgit v1.2.3