arch/mips/include/uapi/asm/shmbuf.h

   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 */