Release 4.12 include/linux/userfaultfd_k.h
/*
* include/linux/userfaultfd_k.h
*
* Copyright (C) 2015 Red Hat, Inc.
*
*/
#ifndef _LINUX_USERFAULTFD_K_H
#define _LINUX_USERFAULTFD_K_H
#ifdef CONFIG_USERFAULTFD
#include <linux/userfaultfd.h> /* linux/include/uapi/linux/userfaultfd.h */
#include <linux/fcntl.h>
/*
* CAREFUL: Check include/uapi/asm-generic/fcntl.h when defining
* new flags, since they might collide with O_* ones. We want
* to re-use O_* flags that couldn't possibly have a meaning
* from userfaultfd, in order to leave a free define-space for
* shared O_* flags.
*/
#define UFFD_CLOEXEC O_CLOEXEC
#define UFFD_NONBLOCK O_NONBLOCK
#define UFFD_SHARED_FCNTL_FLAGS (O_CLOEXEC | O_NONBLOCK)
#define UFFD_FLAGS_SET (EFD_SHARED_FCNTL_FLAGS)
extern int handle_userfault(struct vm_fault *vmf, unsigned long reason);
extern ssize_t mcopy_atomic(struct mm_struct *dst_mm, unsigned long dst_start,
unsigned long src_start, unsigned long len);
extern ssize_t mfill_zeropage(struct mm_struct *dst_mm,
unsigned long dst_start,
unsigned long len);
/* mm helpers */
static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma,
struct vm_userfaultfd_ctx vm_ctx)
{
return vma->vm_userfaultfd_ctx.ctx == vm_ctx.ctx;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 27 | 100.00% | 1 | 100.00% |
| Total | 27 | 100.00% | 1 | 100.00% |
static inline bool userfaultfd_missing(struct vm_area_struct *vma)
{
return vma->vm_flags & VM_UFFD_MISSING;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static inline bool userfaultfd_armed(struct vm_area_struct *vma)
{
return vma->vm_flags & (VM_UFFD_MISSING | VM_UFFD_WP);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 23 | 100.00% | 1 | 100.00% |
| Total | 23 | 100.00% | 1 | 100.00% |
extern int dup_userfaultfd(struct vm_area_struct *, struct list_head *);
extern void dup_userfaultfd_complete(struct list_head *);
extern void mremap_userfaultfd_prep(struct vm_area_struct *,
struct vm_userfaultfd_ctx *);
extern void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx *,
unsigned long from, unsigned long to,
unsigned long len);
extern bool userfaultfd_remove(struct vm_area_struct *vma,
unsigned long start,
unsigned long end);
extern int userfaultfd_unmap_prep(struct vm_area_struct *vma,
unsigned long start, unsigned long end,
struct list_head *uf);
extern void userfaultfd_unmap_complete(struct mm_struct *mm,
struct list_head *uf);
#else /* CONFIG_USERFAULTFD */
/* mm helpers */
static inline int handle_userfault(struct vm_fault *vmf, unsigned long reason)
{
return VM_FAULT_SIGBUS;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 17 | 89.47% | 1 | 50.00% |
| Jan Kara | 2 | 10.53% | 1 | 50.00% |
| Total | 19 | 100.00% | 2 | 100.00% |
static inline bool is_mergeable_vm_userfaultfd_ctx(struct vm_area_struct *vma,
struct vm_userfaultfd_ctx vm_ctx)
{
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 19 | 100.00% | 1 | 100.00% |
| Total | 19 | 100.00% | 1 | 100.00% |
static inline bool userfaultfd_missing(struct vm_area_struct *vma)
{
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline bool userfaultfd_armed(struct vm_area_struct *vma)
{
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 15 | 100.00% | 1 | 100.00% |
| Total | 15 | 100.00% | 1 | 100.00% |
static inline int dup_userfaultfd(struct vm_area_struct *vma,
struct list_head *l)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pavel Emelyanov | 20 | 100.00% | 1 | 100.00% |
| Total | 20 | 100.00% | 1 | 100.00% |
static inline void dup_userfaultfd_complete(struct list_head *l)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pavel Emelyanov | 11 | 100.00% | 1 | 100.00% |
| Total | 11 | 100.00% | 1 | 100.00% |
static inline void mremap_userfaultfd_prep(struct vm_area_struct *vma,
struct vm_userfaultfd_ctx *ctx)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pavel Emelyanov | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
static inline void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx *ctx,
unsigned long from,
unsigned long to,
unsigned long len)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pavel Emelyanov | 22 | 95.65% | 1 | 50.00% |
| Andrea Arcangeli | 1 | 4.35% | 1 | 50.00% |
| Total | 23 | 100.00% | 2 | 100.00% |
static inline bool userfaultfd_remove(struct vm_area_struct *vma,
unsigned long start,
unsigned long end)
{
return true;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Pavel Emelyanov | 16 | 69.57% | 1 | 33.33% |
| Andrea Arcangeli | 6 | 26.09% | 1 | 33.33% |
| Mike Rapoport | 1 | 4.35% | 1 | 33.33% |
| Total | 23 | 100.00% | 3 | 100.00% |
static inline int userfaultfd_unmap_prep(struct vm_area_struct *vma,
unsigned long start, unsigned long end,
struct list_head *uf)
{
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mike Rapoport | 28 | 100.00% | 1 | 100.00% |
| Total | 28 | 100.00% | 1 | 100.00% |
static inline void userfaultfd_unmap_complete(struct mm_struct *mm,
struct list_head *uf)
{
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Mike Rapoport | 16 | 100.00% | 1 | 100.00% |
| Total | 16 | 100.00% | 1 | 100.00% |
#endif /* CONFIG_USERFAULTFD */
#endif /* _LINUX_USERFAULTFD_K_H */
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Andrea Arcangeli | 241 | 49.69% | 4 | 40.00% |
| Pavel Emelyanov | 156 | 32.16% | 3 | 30.00% |
| Mike Rapoport | 84 | 17.32% | 2 | 20.00% |
| Jan Kara | 4 | 0.82% | 1 | 10.00% |
| Total | 485 | 100.00% | 10 | 100.00% |
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