coredump.h 2.7 KB

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  1. /* SPDX-License-Identifier: GPL-2.0 */
  2. #ifndef _LINUX_SCHED_COREDUMP_H
  3. #define _LINUX_SCHED_COREDUMP_H
  4. #include <linux/mm_types.h>
  5. #define SUID_DUMP_DISABLE 0 /* No setuid dumping */
  6. #define SUID_DUMP_USER 1 /* Dump as user of process */
  7. #define SUID_DUMP_ROOT 2 /* Dump as root */
  8. /* mm flags */
  9. /* for SUID_DUMP_* above */
  10. #define MMF_DUMPABLE_BITS 2
  11. #define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
  12. extern void set_dumpable(struct mm_struct *mm, int value);
  13. /*
  14. * This returns the actual value of the suid_dumpable flag. For things
  15. * that are using this for checking for privilege transitions, it must
  16. * test against SUID_DUMP_USER rather than treating it as a boolean
  17. * value.
  18. */
  19. static inline int __get_dumpable(unsigned long mm_flags)
  20. {
  21. return mm_flags & MMF_DUMPABLE_MASK;
  22. }
  23. static inline int get_dumpable(struct mm_struct *mm)
  24. {
  25. return __get_dumpable(mm->flags);
  26. }
  27. /* coredump filter bits */
  28. #define MMF_DUMP_ANON_PRIVATE 2
  29. #define MMF_DUMP_ANON_SHARED 3
  30. #define MMF_DUMP_MAPPED_PRIVATE 4
  31. #define MMF_DUMP_MAPPED_SHARED 5
  32. #define MMF_DUMP_ELF_HEADERS 6
  33. #define MMF_DUMP_HUGETLB_PRIVATE 7
  34. #define MMF_DUMP_HUGETLB_SHARED 8
  35. #define MMF_DUMP_DAX_PRIVATE 9
  36. #define MMF_DUMP_DAX_SHARED 10
  37. #define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
  38. #define MMF_DUMP_FILTER_BITS 9
  39. #define MMF_DUMP_FILTER_MASK \
  40. (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
  41. #define MMF_DUMP_FILTER_DEFAULT \
  42. ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
  43. (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
  44. #ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
  45. # define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
  46. #else
  47. # define MMF_DUMP_MASK_DEFAULT_ELF 0
  48. #endif
  49. /* leave room for more dump flags */
  50. #define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */
  51. #define MMF_VM_HUGEPAGE 17 /* set when VM_HUGEPAGE is set on vma */
  52. /*
  53. * This one-shot flag is dropped due to necessity of changing exe once again
  54. * on NFS restore
  55. */
  56. //#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */
  57. #define MMF_HAS_UPROBES 19 /* has uprobes */
  58. #define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */
  59. #define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */
  60. #define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */
  61. #define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */
  62. #define MMF_DISABLE_THP 24 /* disable THP for all VMAs */
  63. #define MMF_OOM_VICTIM 25 /* mm is the oom victim */
  64. #define MMF_OOM_REAP_QUEUED 26 /* mm was queued for oom_reaper */
  65. #define MMF_MULTIPROCESS 27 /* mm is shared between processes */
  66. #define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP)
  67. #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
  68. MMF_DISABLE_THP_MASK)
  69. #endif /* _LINUX_SCHED_COREDUMP_H */