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_OOM_REAP_QUEUED 26 /* mm was queued for oom_reaper */ 75#define MMF_MULTIPROCESS 27 /* mm is shared between processes */ 76/* 77 * MMF_HAS_PINNED: Whether this mm has pinned any pages. This can be either 78 * replaced in the future by mm.pinned_vm when it becomes stable, or grow into 79 * a counter on its own. We're aggresive on this bit for now: even if the 80 * pinned pages were unpinned later on, we'll still keep this bit set for the 81 * lifecycle of this mm, just for simplicity. 82 */ 83#define MMF_HAS_PINNED 28 /* FOLL_PIN has run, never cleared */ 84#define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP) 85 86#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\ 87 MMF_DISABLE_THP_MASK) 88 89#endif /* _LINUX_SCHED_COREDUMP_H */ 90