b3541d912a
With the last usage of MMF_OOM_VICTIM in exit_mmap gone, this flag is now unused and can be removed. [akpm@linux-foundation.org: remove comment about now-removed mm_is_oom_victim()] Link: https://lkml.kernel.org/r/20220531223100.510392-2-surenb@google.com Signed-off-by: Suren Baghdasaryan <surenb@google.com> Acked-by: Michal Hocko <mhocko@suse.com> Cc: David Rientjes <rientjes@google.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Johannes Weiner <hannes@cmpxchg.org> Cc: Roman Gushchin <guro@fb.com> Cc: Minchan Kim <minchan@kernel.org> Cc: "Kirill A . Shutemov" <kirill@shutemov.name> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Christian Brauner (Microsoft) <brauner@kernel.org> Cc: Christoph Hellwig <hch@infradead.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: David Hildenbrand <david@redhat.com> Cc: Jann Horn <jannh@google.com> Cc: Shakeel Butt <shakeelb@google.com> Cc: Peter Xu <peterx@redhat.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Liam Howlett <liam.howlett@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
90 lines
3.1 KiB
C
90 lines
3.1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _LINUX_SCHED_COREDUMP_H
|
|
#define _LINUX_SCHED_COREDUMP_H
|
|
|
|
#include <linux/mm_types.h>
|
|
|
|
#define SUID_DUMP_DISABLE 0 /* No setuid dumping */
|
|
#define SUID_DUMP_USER 1 /* Dump as user of process */
|
|
#define SUID_DUMP_ROOT 2 /* Dump as root */
|
|
|
|
/* mm flags */
|
|
|
|
/* for SUID_DUMP_* above */
|
|
#define MMF_DUMPABLE_BITS 2
|
|
#define MMF_DUMPABLE_MASK ((1 << MMF_DUMPABLE_BITS) - 1)
|
|
|
|
extern void set_dumpable(struct mm_struct *mm, int value);
|
|
/*
|
|
* This returns the actual value of the suid_dumpable flag. For things
|
|
* that are using this for checking for privilege transitions, it must
|
|
* test against SUID_DUMP_USER rather than treating it as a boolean
|
|
* value.
|
|
*/
|
|
static inline int __get_dumpable(unsigned long mm_flags)
|
|
{
|
|
return mm_flags & MMF_DUMPABLE_MASK;
|
|
}
|
|
|
|
static inline int get_dumpable(struct mm_struct *mm)
|
|
{
|
|
return __get_dumpable(mm->flags);
|
|
}
|
|
|
|
/* coredump filter bits */
|
|
#define MMF_DUMP_ANON_PRIVATE 2
|
|
#define MMF_DUMP_ANON_SHARED 3
|
|
#define MMF_DUMP_MAPPED_PRIVATE 4
|
|
#define MMF_DUMP_MAPPED_SHARED 5
|
|
#define MMF_DUMP_ELF_HEADERS 6
|
|
#define MMF_DUMP_HUGETLB_PRIVATE 7
|
|
#define MMF_DUMP_HUGETLB_SHARED 8
|
|
#define MMF_DUMP_DAX_PRIVATE 9
|
|
#define MMF_DUMP_DAX_SHARED 10
|
|
|
|
#define MMF_DUMP_FILTER_SHIFT MMF_DUMPABLE_BITS
|
|
#define MMF_DUMP_FILTER_BITS 9
|
|
#define MMF_DUMP_FILTER_MASK \
|
|
(((1 << MMF_DUMP_FILTER_BITS) - 1) << MMF_DUMP_FILTER_SHIFT)
|
|
#define MMF_DUMP_FILTER_DEFAULT \
|
|
((1 << MMF_DUMP_ANON_PRIVATE) | (1 << MMF_DUMP_ANON_SHARED) |\
|
|
(1 << MMF_DUMP_HUGETLB_PRIVATE) | MMF_DUMP_MASK_DEFAULT_ELF)
|
|
|
|
#ifdef CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS
|
|
# define MMF_DUMP_MASK_DEFAULT_ELF (1 << MMF_DUMP_ELF_HEADERS)
|
|
#else
|
|
# define MMF_DUMP_MASK_DEFAULT_ELF 0
|
|
#endif
|
|
/* leave room for more dump flags */
|
|
#define MMF_VM_MERGEABLE 16 /* KSM may merge identical pages */
|
|
#define MMF_VM_HUGEPAGE 17 /* set when mm is available for
|
|
khugepaged */
|
|
/*
|
|
* This one-shot flag is dropped due to necessity of changing exe once again
|
|
* on NFS restore
|
|
*/
|
|
//#define MMF_EXE_FILE_CHANGED 18 /* see prctl_set_mm_exe_file() */
|
|
|
|
#define MMF_HAS_UPROBES 19 /* has uprobes */
|
|
#define MMF_RECALC_UPROBES 20 /* MMF_HAS_UPROBES can be wrong */
|
|
#define MMF_OOM_SKIP 21 /* mm is of no interest for the OOM killer */
|
|
#define MMF_UNSTABLE 22 /* mm is unstable for copy_from_user */
|
|
#define MMF_HUGE_ZERO_PAGE 23 /* mm has ever used the global huge zero page */
|
|
#define MMF_DISABLE_THP 24 /* disable THP for all VMAs */
|
|
#define MMF_OOM_REAP_QUEUED 25 /* mm was queued for oom_reaper */
|
|
#define MMF_MULTIPROCESS 26 /* mm is shared between processes */
|
|
/*
|
|
* MMF_HAS_PINNED: Whether this mm has pinned any pages. This can be either
|
|
* replaced in the future by mm.pinned_vm when it becomes stable, or grow into
|
|
* a counter on its own. We're aggresive on this bit for now: even if the
|
|
* pinned pages were unpinned later on, we'll still keep this bit set for the
|
|
* lifecycle of this mm, just for simplicity.
|
|
*/
|
|
#define MMF_HAS_PINNED 27 /* FOLL_PIN has run, never cleared */
|
|
#define MMF_DISABLE_THP_MASK (1 << MMF_DISABLE_THP)
|
|
|
|
#define MMF_INIT_MASK (MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK |\
|
|
MMF_DISABLE_THP_MASK)
|
|
|
|
#endif /* _LINUX_SCHED_COREDUMP_H */
|