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
17extern 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 */
24static inline int __get_dumpable(unsigned long mm_flags)
25{
26 return mm_flags & MMF_DUMPABLE_MASK;
27}
28
29static 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 */
80