1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef _ASM_SHMBUF_H 3 #define _ASM_SHMBUF_H 4 5 #include <asm/ipcbuf.h> 6 #include <asm/posix_types.h> 7 8 /* 9 * The shmid64_ds structure for the MIPS architecture. 10 * Note extra padding because this structure is passed back and forth 11 * between kernel and user space. 12 * 13 * As MIPS was lacking proper padding after shm_?time, we use 48 bits 14 * of the padding at the end to store a few additional bits of the time. 15 * libc implementations need to take care to convert this into a proper 16 * data structure when moving to 64-bit time_t. 17 */ 18 19 #ifdef __mips64 20 struct shmid64_ds { 21 struct ipc64_perm shm_perm; /* operation perms */ 22 __kernel_size_t shm_segsz; /* size of segment (bytes) */ 23 long shm_atime; /* last attach time */ 24 long shm_dtime; /* last detach time */ 25 long shm_ctime; /* last change time */ 26 __kernel_pid_t shm_cpid; /* pid of creator */ 27 __kernel_pid_t shm_lpid; /* pid of last operator */ 28 unsigned long shm_nattch; /* no. of current attaches */ 29 unsigned long __unused1; 30 unsigned long __unused2; 31 }; 32 #else 33 struct shmid64_ds { 34 struct ipc64_perm shm_perm; /* operation perms */ 35 __kernel_size_t shm_segsz; /* size of segment (bytes) */ 36 unsigned long shm_atime; /* last attach time */ 37 unsigned long shm_dtime; /* last detach time */ 38 unsigned long shm_ctime; /* last change time */ 39 __kernel_pid_t shm_cpid; /* pid of creator */ 40 __kernel_pid_t shm_lpid; /* pid of last operator */ 41 unsigned long shm_nattch; /* no. of current attaches */ 42 unsigned short shm_atime_high; 43 unsigned short shm_dtime_high; 44 unsigned short shm_ctime_high; 45 unsigned short __unused1; 46 }; 47 #endif 48 49 struct shminfo64 { 50 unsigned long shmmax; 51 unsigned long shmmin; 52 unsigned long shmmni; 53 unsigned long shmseg; 54 unsigned long shmall; 55 unsigned long __unused1; 56 unsigned long __unused2; 57 unsigned long __unused3; 58 unsigned long __unused4; 59 }; 60 61 #endif /* _ASM_SHMBUF_H */ 62