/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _UAPI_LINUX_SHM_H_ #define _UAPI_LINUX_SHM_H_ #include <linux/ipc.h> #include <linux/errno.h> #include <asm-generic/hugetlb_encode.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 … #define SHMMNI … #define SHMMAX … #define SHMALL … #define SHMSEG … /* Obsolete, used only for backwards compatibility and libc5 compiles */ struct shmid_ds { … }; /* Include the definition of shmid64_ds and shminfo64 */ #include <asm/shmbuf.h> /* * shmget() shmflg values. */ /* The bottom nine bits are the same as open(2) mode flags */ #define SHM_R … #define SHM_W … /* Bits 9 & 10 are IPC_CREAT and IPC_EXCL */ #define SHM_HUGETLB … #define SHM_NORESERVE … /* * Huge page size encoding when SHM_HUGETLB is specified, and a huge page * size other than the default is desired. See hugetlb_encode.h */ #define SHM_HUGE_SHIFT … #define SHM_HUGE_MASK … #define SHM_HUGE_64KB … #define SHM_HUGE_512KB … #define SHM_HUGE_1MB … #define SHM_HUGE_2MB … #define SHM_HUGE_8MB … #define SHM_HUGE_16MB … #define SHM_HUGE_32MB … #define SHM_HUGE_256MB … #define SHM_HUGE_512MB … #define SHM_HUGE_1GB … #define SHM_HUGE_2GB … #define SHM_HUGE_16GB … /* * shmat() shmflg values */ #define SHM_RDONLY … #define SHM_RND … #define SHM_REMAP … #define SHM_EXEC … /* super user shmctl commands */ #define SHM_LOCK … #define SHM_UNLOCK … /* ipcs ctl commands */ #define SHM_STAT … #define SHM_INFO … #define SHM_STAT_ANY … /* Obsolete, used only for backwards compatibility */ struct shminfo { … }; struct shm_info { … }; #endif /* _UAPI_LINUX_SHM_H_ */
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