Line data    Source code

       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           0 :         return mm_flags & MMF_DUMPABLE_MASK;
      27             : }
      28             : 
      29             : static inline int get_dumpable(struct mm_struct *mm)
      30             : {
      31           0 :         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_OOM_REAP_QUEUED     25      /* mm was queued for oom_reaper */
      75             : #define MMF_MULTIPROCESS        26      /* 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          27      /* FOLL_PIN has run, never cleared */
      84             : 
      85             : #define MMF_HAS_MDWE            28
      86             : #define MMF_HAS_MDWE_MASK       (1 << MMF_HAS_MDWE)
      87             : 
      88             : #define MMF_DISABLE_THP_MASK    (1 << MMF_DISABLE_THP)
      89             : 
      90             : #define MMF_INIT_MASK           (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
      91             :                                  MMF_DISABLE_THP_MASK | MMF_HAS_MDWE_MASK)
      92             : 
      93             : #endif /* _LINUX_SCHED_COREDUMP_H */