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/* SPDX-License-Identifier: GPL-2.0 */
#include <stdint.h>
#include <stdbool.h>
#include <sys/mman.h>
#include <err.h>
#include <strings.h> /* ffsl() */
#include <unistd.h> /* _SC_PAGESIZE */
#include "../kselftest.h"
#define BIT_ULL(nr) (1ULL << (nr))
#define PM_SOFT_DIRTY BIT_ULL(55)
#define PM_MMAP_EXCLUSIVE BIT_ULL(56)
#define PM_UFFD_WP BIT_ULL(57)
#define PM_GUARD_REGION BIT_ULL(58)
#define PM_FILE BIT_ULL(61)
#define PM_SWAP BIT_ULL(62)
#define PM_PRESENT BIT_ULL(63)
extern unsigned int __page_size;
extern unsigned int __page_shift;
static inline unsigned int psize(void)
{
if (!__page_size)
__page_size = sysconf(_SC_PAGESIZE);
return __page_size;
}
static inline unsigned int pshift(void)
{
if (!__page_shift)
__page_shift = (ffsl(psize()) - 1);
return __page_shift;
}
/*
* Plan 9 FS has bugs (at least on QEMU) where certain operations fail with
* ENOENT on unlinked files. See
* https://gitlab.com/qemu-project/qemu/-/issues/103 for some info about such
* bugs. There are rumours of NFS implementations with similar bugs.
*
* Ideally, tests should just detect filesystems known to have such issues and
* bail early. But 9pfs has the additional "feature" that it causes fstatfs to
* pass through the f_type field from the host filesystem. To avoid having to
* scrape /proc/mounts or some other hackery, tests can call this function when
* it seems such a bug might have been encountered.
*/
static inline void skip_test_dodgy_fs(const char *op_name)
{
ksft_test_result_skip("%s failed with ENOENT. Filesystem might be buggy (9pfs?)\n", op_name);
}
uint64_t pagemap_get_entry(int fd, char *start);
bool pagemap_is_softdirty(int fd, char *start);
bool pagemap_is_swapped(int fd, char *start);
bool pagemap_is_populated(int fd, char *start);
unsigned long pagemap_get_pfn(int fd, char *start);
void clear_softdirty(void);
bool check_for_pattern(FILE *fp, const char *pattern, char *buf, size_t len);
uint64_t read_pmd_pagesize(void);
unsigned long rss_anon(void);
bool check_huge_anon(void *addr, int nr_hpages, uint64_t hpage_size);
bool check_huge_file(void *addr, int nr_hpages, uint64_t hpage_size);
bool check_huge_shmem(void *addr, int nr_hpages, uint64_t hpage_size);
int64_t allocate_transhuge(void *ptr, int pagemap_fd);
unsigned long default_huge_page_size(void);
int detect_hugetlb_page_sizes(size_t sizes[], int max);
int uffd_register(int uffd, void *addr, uint64_t len,
bool miss, bool wp, bool minor);
int uffd_unregister(int uffd, void *addr, uint64_t len);
int uffd_register_with_ioctls(int uffd, void *addr, uint64_t len,
bool miss, bool wp, bool minor, uint64_t *ioctls);
unsigned long get_free_hugepages(void);
bool check_vmflag_io(void *addr);
/*
* On ppc64 this will only work with radix 2M hugepage size
*/
#define HPAGE_SHIFT 21
#define HPAGE_SIZE (1 << HPAGE_SHIFT)
#define PAGEMAP_PRESENT(ent) (((ent) & (1ull << 63)) != 0)
#define PAGEMAP_PFN(ent) ((ent) & ((1ull << 55) - 1))
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