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/* SPDX-License-Identifier: GPL-2.0+ */
#pragma once
/*
* Contains declarations that exist in the kernel which have been CUSTOMISED for
* testing purposes to faciliate userland VMA testing.
*/
#ifdef CONFIG_MMU
extern unsigned long mmap_min_addr;
extern unsigned long dac_mmap_min_addr;
#else
#define mmap_min_addr 0UL
#define dac_mmap_min_addr 0UL
#endif
#define VM_WARN_ON(_expr) (WARN_ON(_expr))
#define VM_WARN_ON_ONCE(_expr) (WARN_ON_ONCE(_expr))
#define VM_WARN_ON_VMG(_expr, _vmg) (WARN_ON(_expr))
#define VM_BUG_ON(_expr) (BUG_ON(_expr))
#define VM_BUG_ON_VMA(_expr, _vma) (BUG_ON(_expr))
/* We hardcode this for now. */
#define sysctl_max_map_count 0x1000000UL
#define TASK_SIZE ((1ul << 47)-PAGE_SIZE)
/*
* The shared stubs do not implement this, it amounts to an fprintf(STDERR,...)
* either way :)
*/
#define pr_warn_once pr_err
#define pgtable_supports_soft_dirty() 1
struct anon_vma {
struct anon_vma *root;
struct rb_root_cached rb_root;
/* Test fields. */
bool was_cloned;
bool was_unlinked;
};
static inline void unlink_anon_vmas(struct vm_area_struct *vma)
{
/* For testing purposes, indicate that the anon_vma was unlinked. */
vma->anon_vma->was_unlinked = true;
}
static inline void vma_start_write(struct vm_area_struct *vma)
{
/* Used to indicate to tests that a write operation has begun. */
vma->vm_lock_seq++;
}
static inline __must_check
int vma_start_write_killable(struct vm_area_struct *vma)
{
/* Used to indicate to tests that a write operation has begun. */
vma->vm_lock_seq++;
return 0;
}
static inline int anon_vma_clone(struct vm_area_struct *dst, struct vm_area_struct *src,
enum vma_operation operation)
{
/* For testing purposes. We indicate that an anon_vma has been cloned. */
if (src->anon_vma != NULL) {
dst->anon_vma = src->anon_vma;
dst->anon_vma->was_cloned = true;
}
return 0;
}
static inline int __anon_vma_prepare(struct vm_area_struct *vma)
{
struct anon_vma *anon_vma = calloc(1, sizeof(struct anon_vma));
if (!anon_vma)
return -ENOMEM;
anon_vma->root = anon_vma;
vma->anon_vma = anon_vma;
return 0;
}
static inline int anon_vma_prepare(struct vm_area_struct *vma)
{
if (likely(vma->anon_vma))
return 0;
return __anon_vma_prepare(vma);
}
static inline void vma_lock_init(struct vm_area_struct *vma, bool reset_refcnt)
{
if (reset_refcnt)
refcount_set(&vma->vm_refcnt, 0);
}
static inline vma_flags_t __mk_vma_flags(size_t count, const vma_flag_t *bits)
{
vma_flags_t flags;
int i;
/*
* For testing purposes: allow invalid bit specification so we can
* easily test.
*/
vma_flags_clear_all(&flags);
for (i = 0; i < count; i++)
if (bits[i] < NUM_VMA_FLAG_BITS)
vma_flag_set(&flags, bits[i]);
return flags;
}
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