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Commit 11701c67 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

sched/headers: Move task->mm coredumping related defines and methods from... 


sched/headers: Move task->mm coredumping related defines and methods from <linux/sched.h> to <linux/sched/coredump.h>

This further reduces the size and complexity of <linux/sched.h>.

These are the definitions and APIs that are moved:

  # MMF_*:
  fs/binfmt_elf.c
  fs/binfmt_elf_fdpic.c
  fs/exec.c
  fs/proc/base.c
  include/linux/khugepaged.h
  include/linux/ksm.h
  include/linux/sched/coredump.h
  kernel/events/uprobes.c
  kernel/fork.c
  mm/huge_memory.c
  mm/khugepaged.c
  mm/ksm.c
  mm/memory.c
  mm/oom_kill.c

  # SUID_DUMP_*:
  arch/ia64/include/asm/processor.h
  fs/coredump.c
  fs/exec.c
  fs/proc/internal.h
  include/linux/sched/coredump.h
  kernel/ptrace.c
  kernel/sys.c
  kernel/sysctl.c

  # get_dumpable():
  arch/ia64/include/asm/processor.h
  fs/coredump.c
  fs/exec.c
  fs/proc/internal.h
  include/linux/sched/coredump.h
  kernel/ptrace.c
  kernel/sys.c

  # set_dumpable():
  fs/exec.c
  include/linux/sched/coredump.h
  kernel/cred.c
  kernel/sys.c

Acked-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 68e21be2

include/linux/sched.h

+0 −68
Original line number Diff line number Diff line
@@ -361,74 +361,6 @@ arch_get_unmapped_area_topdown(struct file *filp, unsigned long addr, 
static inline void arch_pick_mmap_layout(struct mm_struct *mm) {}

#endif



#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 VM_HUGEPAGE is set on vma */

/*

 * 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_INIT_MASK		(MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)



struct sighand_struct {

	atomic_t		count;

	struct k_sigaction	action[_NSIG];

include/linux/sched/coredump.h

+69 −0
Original line number Diff line number Diff line
@@ -2,5 +2,74 @@ 
#define _LINUX_SCHED_COREDUMP_H



#include <linux/sched.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 VM_HUGEPAGE is set on vma */

/*

 * 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_INIT_MASK		(MMF_DUMPABLE_MASK | MMF_DUMP_FILTER_MASK)



#endif /* _LINUX_SCHED_COREDUMP_H */