1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_SCHED_COREDUMP_H
3 #define _LINUX_SCHED_COREDUMP_H
5 #include <linux/mm_types.h>
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 */
13 /* for SUID_DUMP_* above */
14 #define MMF_DUMPABLE_BITS 2
15 #define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
17 extern void set_dumpable(struct mm_struct *mm, int value);
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
24 static inline int __get_dumpable(unsigned long mm_flags)
26 return mm_flags & MMF_DUMPABLE_MASK;
29 static inline int get_dumpable(struct mm_struct *mm)
31 return __get_dumpable(mm->flags);
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
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)
53 #ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
54 # define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
56 # define MMF_DUMP_MASK_DEFAULT_ELF 0
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 */
62 * This one-shot flag is dropped due to necessity of changing exe once again
65 //#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */
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_OOM_REAP_QUEUED 26 /* mm was queued for oom_reaper */
75 #define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP)
77 #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
80 #endif /* _LINUX_SCHED_COREDUMP_H */