include/linux/sched/coredump.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_SCHED_COREDUMP_H
   3 #define _LINUX_SCHED_COREDUMP_H
   4
   5 #include <linux/mm_types.h>
   6
   7 #define SUID_DUMP_DISABLE       0       /* No setuid dumping */
   8 #define SUID_DUMP_USER          1       /* Dump as user of process */
   9 #define SUID_DUMP_ROOT          2       /* Dump as root */
  10
  11 /* mm flags */
  12
  13 /* for SUID_DUMP_* above */
  14 #define MMF_DUMPABLE_BITS 2
  15 #define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
  16
  17 extern void set_dumpable(struct mm_struct *mm, int value);
  18 /*
  19  * This returns the actual value of the suid_dumpable flag. For things
  20  * that are using this for checking for privilege transitions, it must
  21  * test against SUID_DUMP_USER rather than treating it as a boolean
  22  * value.
  23  */
  24 static inline int __get_dumpable(unsigned long mm_flags)
  25 {
  26         return mm_flags & MMF_DUMPABLE_MASK;
  27 }
  28
  29 static inline int get_dumpable(struct mm_struct *mm)
  30 {
  31         return __get_dumpable(mm->flags);
  32 }
  33
  34 /* coredump filter bits */
  35 #define MMF_DUMP_ANON_PRIVATE   2
  36 #define MMF_DUMP_ANON_SHARED    3
  37 #define MMF_DUMP_MAPPED_PRIVATE 4
  38 #define MMF_DUMP_MAPPED_SHARED  5
  39 #define MMF_DUMP_ELF_HEADERS    6
  40 #define MMF_DUMP_HUGETLB_PRIVATE 7
  41 #define MMF_DUMP_HUGETLB_SHARED  8
  42 #define MMF_DUMP_DAX_PRIVATE    9
  43 #define MMF_DUMP_DAX_SHARED     10
  44
  45 #define MMF_DUMP_FILTER_SHIFT   MMF_DUMPABLE_BITS
  46 #define MMF_DUMP_FILTER_BITS    9
  47 #define MMF_DUMP_FILTER_MASK \
  48         (((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
  49 #define MMF_DUMP_FILTER_DEFAULT \
  50         ((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
  51          (1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
  52
  53 #ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
  54 # define MMF_DUMP_MASK_DEFAULT_ELF      (1 << MMF_DUMP_ELF_HEADERS)
  55 #else
  56 # define MMF_DUMP_MASK_DEFAULT_ELF      0
  57 #endif
  58                                         /* leave room for more dump flags */
  59 #define MMF_VM_MERGEABLE        16      /* KSM may merge identical pages */
  60 #define MMF_VM_HUGEPAGE         17      /* set when VM_HUGEPAGE is set on vma */
  61 /*
  62  * This one-shot flag is dropped due to necessity of changing exe once again
  63  * on NFS restore
  64  */
  65 //#define MMF_EXE_FILE_CHANGED  18      /* see prctl_set_mm_exe_file() */
  66
  67 #define MMF_HAS_UPROBES         19      /* has uprobes */
  68 #define MMF_RECALC_UPROBES      20      /* MMF_HAS_UPROBES can be wrong */
  69 #define MMF_OOM_SKIP            21      /* mm is of no interest for the OOM killer */
  70 #define MMF_UNSTABLE            22      /* mm is unstable for copy_from_user */
  71 #define MMF_HUGE_ZERO_PAGE      23      /* mm has ever used the global huge zero page */
  72 #define MMF_DISABLE_THP         24      /* disable THP for all VMAs */
  73 #define MMF_OOM_VICTIM          25      /* mm is the oom victim */
  74 #define MMF_DISABLE_THP_MASK    (1 << MMF_DISABLE_THP)
  75
  76 #define MMF_INIT_MASK           (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
  77                                  MMF_DISABLE_THP_MASK)
  78
  79 #endif /* _LINUX_SCHED_COREDUMP_H */