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 */ __get_dumpable(unsigned long mm_flags)24 static inline int __get_dumpable(unsigned long mm_flags) 25 { 26 return mm_flags & MMF_DUMPABLE_MASK; 27 } 28 get_dumpable(struct mm_struct * mm)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 mm is available for 61 khugepaged */ 62 /* 63 * This one-shot flag is dropped due to necessity of changing exe once again 64 * on NFS restore 65 */ 66 //#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */ 67 68 #define MMF_HAS_UPROBES 19 /* has uprobes */ 69 #define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */ 70 #define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */ 71 #define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */ 72 #define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */ 73 #define MMF_DISABLE_THP 24 /* disable THP for all VMAs */ 74 #define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP) 75 #define MMF_OOM_REAP_QUEUED 25 /* mm was queued for oom_reaper */ 76 #define MMF_MULTIPROCESS 26 /* mm is shared between processes */ 77 /* 78 * MMF_HAS_PINNED: Whether this mm has pinned any pages. This can be either 79 * replaced in the future by mm.pinned_vm when it becomes stable, or grow into 80 * a counter on its own. We're aggresive on this bit for now: even if the 81 * pinned pages were unpinned later on, we'll still keep this bit set for the 82 * lifecycle of this mm, just for simplicity. 83 */ 84 #define MMF_HAS_PINNED 27 /* FOLL_PIN has run, never cleared */ 85 86 #define MMF_HAS_MDWE 28 87 #define MMF_HAS_MDWE_MASK (1 << MMF_HAS_MDWE) 88 89 90 #define MMF_HAS_MDWE_NO_INHERIT 29 91 92 #define MMF_VM_MERGE_ANY 30 93 #define MMF_VM_MERGE_ANY_MASK (1 << MMF_VM_MERGE_ANY) 94 95 #define MMF_TOPDOWN 31 /* mm searches top down by default */ 96 #define MMF_TOPDOWN_MASK (1 << MMF_TOPDOWN) 97 98 #define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\ 99 MMF_DISABLE_THP_MASK | MMF_HAS_MDWE_MASK |\ 100 MMF_VM_MERGE_ANY_MASK | MMF_TOPDOWN_MASK) 101 mmf_init_flags(unsigned long flags)102 static inline unsigned long mmf_init_flags(unsigned long flags) 103 { 104 if (flags & (1UL << MMF_HAS_MDWE_NO_INHERIT)) 105 flags &= ~((1UL << MMF_HAS_MDWE) | 106 (1UL << MMF_HAS_MDWE_NO_INHERIT)); 107 return flags & MMF_INIT_MASK; 108 } 109 110 #endif /* _LINUX_SCHED_COREDUMP_H */ 111