include/linux/sched/coredump.h

   1 #ifndef _LINUX_SCHED_COREDUMP_H
   2 #define _LINUX_SCHED_COREDUMP_H
   3
   4 #include <linux/mm_types.h>
   5
   6 #define SUID_DUMP_DISABLE       0       /* No setuid dumping */
   7 #define SUID_DUMP_USER          1       /* Dump as user of process */
   8 #define SUID_DUMP_ROOT          2       /* Dump as root */
   9
  10 /* mm flags */
  11
  12 /* for SUID_DUMP_* above */
  13 #define MMF_DUMPABLE_BITS 2
  14 #define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
  15
  16 extern void set_dumpable(struct mm_struct *mm, int value);
  17 /*
  18  * This returns the actual value of the suid_dumpable flag. For things
  19  * that are using this for checking for privilege transitions, it must
  20  * test against SUID_DUMP_USER rather than treating it as a boolean
  21  * value.
  22  */
  23 static inline int __get_dumpable(unsigned long mm_flags)
  24 {
  25         return mm_flags & MMF_DUMPABLE_MASK;
  26 }
  27
  28 static inline int get_dumpable(struct mm_struct *mm)
  29 {
  30         return __get_dumpable(mm->flags);
  31 }
  32
  33 /* coredump filter bits */
  34 #define MMF_DUMP_ANON_PRIVATE   2
  35 #define MMF_DUMP_ANON_SHARED    3
  36 #define MMF_DUMP_MAPPED_PRIVATE 4
  37 #define MMF_DUMP_MAPPED_SHARED  5
  38 #define MMF_DUMP_ELF_HEADERS    6
  39 #define MMF_DUMP_HUGETLB_PRIVATE 7
  40 #define MMF_DUMP_HUGETLB_SHARED  8
  41 #define MMF_DUMP_DAX_PRIVATE    9
  42 #define MMF_DUMP_DAX_SHARED     10
  43
  44 #define MMF_DUMP_FILTER_SHIFT   MMF_DUMPABLE_BITS
  45 #define MMF_DUMP_FILTER_BITS    9
  46 #define MMF_DUMP_FILTER_MASK \
  47         (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
  48 #define MMF_DUMP_FILTER_DEFAULT \
  49         ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
  50          (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
  51
  52 #ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
  53 # define MMF_DUMP_MASK_DEFAULT_ELF      (1 << MMF_DUMP_ELF_HEADERS)
  54 #else
  55 # define MMF_DUMP_MASK_DEFAULT_ELF      0
  56 #endif
  57                                         /* leave room for more dump flags */
  58 #define MMF_VM_MERGEABLE        16      /* KSM may merge identical pages */
  59 #define MMF_VM_HUGEPAGE         17      /* set when VM_HUGEPAGE is set on vma */
  60 /*
  61  * This one-shot flag is dropped due to necessity of changing exe once again
  62  * on NFS restore
  63  */
  64 //#define MMF_EXE_FILE_CHANGED  18      /* see prctl_set_mm_exe_file() */
  65
  66 #define MMF_HAS_UPROBES         19      /* has uprobes */
  67 #define MMF_RECALC_UPROBES      20      /* MMF_HAS_UPROBES can be wrong */
  68 #define MMF_OOM_SKIP            21      /* mm is of no interest for the OOM killer */
  69 #define MMF_UNSTABLE            22      /* mm is unstable for copy_from_user */
  70 #define MMF_HUGE_ZERO_PAGE      23      /* mm has ever used the global huge zero page */
  71
  72 #define MMF_INIT_MASK           (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)
  73
  74 #endif /* _LINUX_SCHED_COREDUMP_H */