ipcbuf.h 1.0 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  2. #ifndef __ASM_GENERIC_IPCBUF_H
  3. #define __ASM_GENERIC_IPCBUF_H
  4. #include <linux/posix_types.h>
  5. /*
  6. * The generic ipc64_perm structure:
  7. * Note extra padding because this structure is passed back and forth
  8. * between kernel and user space.
  9. *
  10. * ipc64_perm was originally meant to be architecture specific, but
  11. * everyone just ended up making identical copies without specific
  12. * optimizations, so we may just as well all use the same one.
  13. *
  14. * Pad space is left for:
  15. * - 32-bit mode_t on architectures that only had 16 bit
  16. * - 32-bit seq
  17. * - 2 miscellaneous 32-bit values
  18. */
  19. struct ipc64_perm {
  20. __kernel_key_t key;
  21. __kernel_uid32_t uid;
  22. __kernel_gid32_t gid;
  23. __kernel_uid32_t cuid;
  24. __kernel_gid32_t cgid;
  25. __kernel_mode_t mode;
  26. /* pad if mode_t is u16: */
  27. unsigned char __pad1[4 - sizeof(__kernel_mode_t)];
  28. unsigned short seq;
  29. unsigned short __pad2;
  30. __kernel_ulong_t __unused1;
  31. __kernel_ulong_t __unused2;
  32. };
  33. #endif /* __ASM_GENERIC_IPCBUF_H */