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kernel / pub / scm / linux / kernel / git / akpm / 25-new / 63f373f73ce6ffea62c9dd03309a96bdebff7ff0 / . / patches / old / selftests-mm-uffd-refactor-non-composite-global-vars-into-struct.patch
blob: 150e9e290a8f7e81907948c72d33c232047a86af [file] [log] [blame]
From: Ujwal Kundur <ujwal.kundur@gmail.com>
Subject: selftests/mm/uffd: refactor non-composite global vars into struct
Date: Fri, 29 Aug 2025 21:26:00 +0530
Refactor macros and non-composite global variable definitions into a
struct that is defined at the start of a test and is passed around instead
of relying on global vars.
Link: https://lkml.kernel.org/r/20250829155600.2000-1-ujwal.kundur@gmail.com
Signed-off-by: Ujwal Kundur <ujwal.kundur@gmail.com>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Brendan Jackman <jackmanb@google.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
tools/testing/selftests/mm/uffd-common.c | 271 ++++----
tools/testing/selftests/mm/uffd-common.h | 78 +-
tools/testing/selftests/mm/uffd-stress.c | 228 +++---
tools/testing/selftests/mm/uffd-unit-tests.c | 561 ++++++++---------
tools/testing/selftests/mm/uffd-wp-mremap.c | 20
5 files changed, 616 insertions(+), 542 deletions(-)
--- a/tools/testing/selftests/mm/uffd-common.c~selftests-mm-uffd-refactor-non-composite-global-vars-into-struct
+++ a/tools/testing/selftests/mm/uffd-common.c
@@ -7,18 +7,29 @@
#include "uffd-common.h"
-#define BASE_PMD_ADDR ((void *)(1UL << 30))
-
-volatile bool test_uffdio_copy_eexist = true;
-unsigned long nr_parallel, nr_pages, nr_pages_per_cpu, page_size;
-char *area_src, *area_src_alias, *area_dst, *area_dst_alias, *area_remap;
-int uffd = -1, uffd_flags, finished, *pipefd, test_type;
-bool map_shared;
-bool test_uffdio_wp = true;
-unsigned long long *count_verify;
uffd_test_ops_t *uffd_test_ops;
uffd_test_case_ops_t *uffd_test_case_ops;
-atomic_bool ready_for_fork;
+
+#define BASE_PMD_ADDR ((void *)(1UL << 30))
+
+/* pthread_mutex_t starts at page offset 0 */
+pthread_mutex_t *area_mutex(char *area, unsigned long nr, uffd_global_test_opts_t *gopts)
+{
+ return (pthread_mutex_t *) (area + nr * gopts->page_size);
+}
+
+/*
+ * count is placed in the page after pthread_mutex_t naturally aligned
+ * to avoid non alignment faults on non-x86 archs.
+ */
+volatile unsigned long long *area_count(char *area, unsigned long nr,
+ uffd_global_test_opts_t *gopts)
+{
+ return (volatile unsigned long long *)
+ ((unsigned long)(area + nr * gopts->page_size +
+ sizeof(pthread_mutex_t) + sizeof(unsigned long long) - 1) &
+ ~(unsigned long)(sizeof(unsigned long long) - 1));
+}
static int uffd_mem_fd_create(off_t mem_size, bool hugetlb)
{
@@ -40,15 +51,15 @@ static int uffd_mem_fd_create(off_t mem_
return mem_fd;
}
-static void anon_release_pages(char *rel_area)
+static void anon_release_pages(uffd_global_test_opts_t *gopts, char *rel_area)
{
- if (madvise(rel_area, nr_pages * page_size, MADV_DONTNEED))
+ if (madvise(rel_area, gopts->nr_pages * gopts->page_size, MADV_DONTNEED))
err("madvise(MADV_DONTNEED) failed");
}
-static int anon_allocate_area(void **alloc_area, bool is_src)
+static int anon_allocate_area(uffd_global_test_opts_t *gopts, void **alloc_area, bool is_src)
{
- *alloc_area = mmap(NULL, nr_pages * page_size, PROT_READ | PROT_WRITE,
+ *alloc_area = mmap(NULL, gopts->nr_pages * gopts->page_size, PROT_READ | PROT_WRITE,
MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
if (*alloc_area == MAP_FAILED) {
*alloc_area = NULL;
@@ -57,31 +68,32 @@ static int anon_allocate_area(void **all
return 0;
}
-static void noop_alias_mapping(__u64 *start, size_t len, unsigned long offset)
+static void noop_alias_mapping(uffd_global_test_opts_t *gopts, __u64 *start,
+ size_t len, unsigned long offset)
{
}
-static void hugetlb_release_pages(char *rel_area)
+static void hugetlb_release_pages(uffd_global_test_opts_t *gopts, char *rel_area)
{
- if (!map_shared) {
- if (madvise(rel_area, nr_pages * page_size, MADV_DONTNEED))
+ if (!gopts->map_shared) {
+ if (madvise(rel_area, gopts->nr_pages * gopts->page_size, MADV_DONTNEED))
err("madvise(MADV_DONTNEED) failed");
} else {
- if (madvise(rel_area, nr_pages * page_size, MADV_REMOVE))
+ if (madvise(rel_area, gopts->nr_pages * gopts->page_size, MADV_REMOVE))
err("madvise(MADV_REMOVE) failed");
}
}
-static int hugetlb_allocate_area(void **alloc_area, bool is_src)
+static int hugetlb_allocate_area(uffd_global_test_opts_t *gopts, void **alloc_area, bool is_src)
{
- off_t size = nr_pages * page_size;
+ off_t size = gopts->nr_pages * gopts->page_size;
off_t offset = is_src ? 0 : size;
void *area_alias = NULL;
char **alloc_area_alias;
int mem_fd = uffd_mem_fd_create(size * 2, true);
*alloc_area = mmap(NULL, size, PROT_READ | PROT_WRITE,
- (map_shared ? MAP_SHARED : MAP_PRIVATE) |
+ (gopts->map_shared ? MAP_SHARED : MAP_PRIVATE) |
(is_src ? 0 : MAP_NORESERVE),
mem_fd, offset);
if (*alloc_area == MAP_FAILED) {
@@ -89,7 +101,7 @@ static int hugetlb_allocate_area(void **
return -errno;
}
- if (map_shared) {
+ if (gopts->map_shared) {
area_alias = mmap(NULL, size, PROT_READ | PROT_WRITE,
MAP_SHARED, mem_fd, offset);
if (area_alias == MAP_FAILED)
@@ -97,9 +109,9 @@ static int hugetlb_allocate_area(void **
}
if (is_src) {
- alloc_area_alias = &area_src_alias;
+ alloc_area_alias = &gopts->area_src_alias;
} else {
- alloc_area_alias = &area_dst_alias;
+ alloc_area_alias = &gopts->area_dst_alias;
}
if (area_alias)
*alloc_area_alias = area_alias;
@@ -108,24 +120,25 @@ static int hugetlb_allocate_area(void **
return 0;
}
-static void hugetlb_alias_mapping(__u64 *start, size_t len, unsigned long offset)
+static void hugetlb_alias_mapping(uffd_global_test_opts_t *gopts, __u64 *start,
+ size_t len, unsigned long offset)
{
- if (!map_shared)
+ if (!gopts->map_shared)
return;
- *start = (unsigned long) area_dst_alias + offset;
+ *start = (unsigned long) gopts->area_dst_alias + offset;
}
-static void shmem_release_pages(char *rel_area)
+static void shmem_release_pages(uffd_global_test_opts_t *gopts, char *rel_area)
{
- if (madvise(rel_area, nr_pages * page_size, MADV_REMOVE))
+ if (madvise(rel_area, gopts->nr_pages * gopts->page_size, MADV_REMOVE))
err("madvise(MADV_REMOVE) failed");
}
-static int shmem_allocate_area(void **alloc_area, bool is_src)
+static int shmem_allocate_area(uffd_global_test_opts_t *gopts, void **alloc_area, bool is_src)
{
void *area_alias = NULL;
- size_t bytes = nr_pages * page_size, hpage_size = read_pmd_pagesize();
+ size_t bytes = gopts->nr_pages * gopts->page_size, hpage_size = read_pmd_pagesize();
unsigned long offset = is_src ? 0 : bytes;
char *p = NULL, *p_alias = NULL;
int mem_fd = uffd_mem_fd_create(bytes * 2, false);
@@ -159,22 +172,23 @@ static int shmem_allocate_area(void **al
err("mmap of anonymous memory failed at %p", p_alias);
if (is_src)
- area_src_alias = area_alias;
+ gopts->area_src_alias = area_alias;
else
- area_dst_alias = area_alias;
+ gopts->area_dst_alias = area_alias;
close(mem_fd);
return 0;
}
-static void shmem_alias_mapping(__u64 *start, size_t len, unsigned long offset)
+static void shmem_alias_mapping(uffd_global_test_opts_t *gopts, __u64 *start,
+ size_t len, unsigned long offset)
{
- *start = (unsigned long)area_dst_alias + offset;
+ *start = (unsigned long)gopts->area_dst_alias + offset;
}
-static void shmem_check_pmd_mapping(void *p, int expect_nr_hpages)
+static void shmem_check_pmd_mapping(uffd_global_test_opts_t *gopts, void *p, int expect_nr_hpages)
{
- if (!check_huge_shmem(area_dst_alias, expect_nr_hpages,
+ if (!check_huge_shmem(gopts->area_dst_alias, expect_nr_hpages,
read_pmd_pagesize()))
err("Did not find expected %d number of hugepages",
expect_nr_hpages);
@@ -234,18 +248,18 @@ void uffd_stats_report(struct uffd_args
printf("\n");
}
-int userfaultfd_open(uint64_t *features)
+int userfaultfd_open(uffd_global_test_opts_t *gopts, uint64_t *features)
{
struct uffdio_api uffdio_api;
- uffd = uffd_open(UFFD_FLAGS);
- if (uffd < 0)
+ gopts->uffd = uffd_open(UFFD_FLAGS);
+ if (gopts->uffd < 0)
return -1;
- uffd_flags = fcntl(uffd, F_GETFD, NULL);
+ gopts->uffd_flags = fcntl(gopts->uffd, F_GETFD, NULL);
uffdio_api.api = UFFD_API;
uffdio_api.features = *features;
- if (ioctl(uffd, UFFDIO_API, &uffdio_api))
+ if (ioctl(gopts->uffd, UFFDIO_API, &uffdio_api))
/* Probably lack of CAP_PTRACE? */
return -1;
if (uffdio_api.api != UFFD_API)
@@ -255,59 +269,63 @@ int userfaultfd_open(uint64_t *features)
return 0;
}
-static inline void munmap_area(void **area)
+static inline void munmap_area(uffd_global_test_opts_t *gopts, void **area)
{
if (*area)
- if (munmap(*area, nr_pages * page_size))
+ if (munmap(*area, gopts->nr_pages * gopts->page_size))
err("munmap");
*area = NULL;
}
-void uffd_test_ctx_clear(void)
+void uffd_test_ctx_clear(uffd_global_test_opts_t *gopts)
{
size_t i;
- if (pipefd) {
- for (i = 0; i < nr_parallel * 2; ++i) {
- if (close(pipefd[i]))
+ if (gopts->pipefd) {
+ for (i = 0; i < gopts->nr_parallel * 2; ++i) {
+ if (close(gopts->pipefd[i]))
err("close pipefd");
}
- free(pipefd);
- pipefd = NULL;
+ free(gopts->pipefd);
+ gopts->pipefd = NULL;
}
- if (count_verify) {
- free(count_verify);
- count_verify = NULL;
+ if (gopts->count_verify) {
+ free(gopts->count_verify);
+ gopts->count_verify = NULL;
}
- if (uffd != -1) {
- if (close(uffd))
+ if (gopts->uffd != -1) {
+ if (close(gopts->uffd))
err("close uffd");
- uffd = -1;
+ gopts->uffd = -1;
}
- munmap_area((void **)&area_src);
- munmap_area((void **)&area_src_alias);
- munmap_area((void **)&area_dst);
- munmap_area((void **)&area_dst_alias);
- munmap_area((void **)&area_remap);
+ munmap_area(gopts, (void **)&gopts->area_src);
+ munmap_area(gopts, (void **)&gopts->area_src_alias);
+ munmap_area(gopts, (void **)&gopts->area_dst);
+ munmap_area(gopts, (void **)&gopts->area_dst_alias);
+ munmap_area(gopts, (void **)&gopts->area_remap);
}
-int uffd_test_ctx_init(uint64_t features, const char **errmsg)
+int uffd_test_ctx_init(uffd_global_test_opts_t *gopts, uint64_t features, const char **errmsg)
{
unsigned long nr, cpu;
int ret;
+ gopts->area_src_alias = NULL;
+ gopts->area_dst_alias = NULL;
+ gopts->area_remap = NULL;
+
if (uffd_test_case_ops && uffd_test_case_ops->pre_alloc) {
- ret = uffd_test_case_ops->pre_alloc(errmsg);
+ ret = uffd_test_case_ops->pre_alloc(gopts, errmsg);
if (ret)
return ret;
}
- ret = uffd_test_ops->allocate_area((void **)&area_src, true);
- ret |= uffd_test_ops->allocate_area((void **)&area_dst, false);
+ ret = uffd_test_ops->allocate_area(gopts, (void **) &gopts->area_src, true);
+ ret |= uffd_test_ops->allocate_area(gopts, (void **) &gopts->area_dst, false);
if (ret) {
if (errmsg)
*errmsg = "memory allocation failed";
@@ -315,26 +333,26 @@ int uffd_test_ctx_init(uint64_t features
}
if (uffd_test_case_ops && uffd_test_case_ops->post_alloc) {
- ret = uffd_test_case_ops->post_alloc(errmsg);
+ ret = uffd_test_case_ops->post_alloc(gopts, errmsg);
if (ret)
return ret;
}
- ret = userfaultfd_open(&features);
+ ret = userfaultfd_open(gopts, &features);
if (ret) {
if (errmsg)
*errmsg = "possible lack of privilege";
return ret;
}
- count_verify = malloc(nr_pages * sizeof(unsigned long long));
- if (!count_verify)
+ gopts->count_verify = malloc(gopts->nr_pages * sizeof(unsigned long long));
+ if (!gopts->count_verify)
err("count_verify");
- for (nr = 0; nr < nr_pages; nr++) {
- *area_mutex(area_src, nr) =
+ for (nr = 0; nr < gopts->nr_pages; nr++) {
+ *area_mutex(gopts->area_src, nr, gopts) =
(pthread_mutex_t)PTHREAD_MUTEX_INITIALIZER;
- count_verify[nr] = *area_count(area_src, nr) = 1;
+ gopts->count_verify[nr] = *area_count(gopts->area_src, nr, gopts) = 1;
/*
* In the transition between 255 to 256, powerpc will
* read out of order in my_bcmp and see both bytes as
@@ -342,7 +360,7 @@ int uffd_test_ctx_init(uint64_t features
* after the count, to avoid my_bcmp to trigger false
* positives.
*/
- *(area_count(area_src, nr) + 1) = 1;
+ *(area_count(gopts->area_src, nr, gopts) + 1) = 1;
}
/*
@@ -363,13 +381,13 @@ int uffd_test_ctx_init(uint64_t features
* proactively split the thp and drop any accidentally initialized
* pages within area_dst.
*/
- uffd_test_ops->release_pages(area_dst);
+ uffd_test_ops->release_pages(gopts, gopts->area_dst);
- pipefd = malloc(sizeof(int) * nr_parallel * 2);
- if (!pipefd)
+ gopts->pipefd = malloc(sizeof(int) * gopts->nr_parallel * 2);
+ if (!gopts->pipefd)
err("pipefd");
- for (cpu = 0; cpu < nr_parallel; cpu++)
- if (pipe2(&pipefd[cpu * 2], O_CLOEXEC | O_NONBLOCK))
+ for (cpu = 0; cpu < gopts->nr_parallel; cpu++)
+ if (pipe2(&gopts->pipefd[cpu * 2], O_CLOEXEC | O_NONBLOCK))
err("pipe");
return 0;
@@ -416,9 +434,9 @@ static void continue_range(int ufd, __u6
ret, (int64_t) req.mapped);
}
-int uffd_read_msg(int ufd, struct uffd_msg *msg)
+int uffd_read_msg(uffd_global_test_opts_t *gopts, struct uffd_msg *msg)
{
- int ret = read(uffd, msg, sizeof(*msg));
+ int ret = read(gopts->uffd, msg, sizeof(*msg));
if (ret != sizeof(*msg)) {
if (ret < 0) {
@@ -433,7 +451,8 @@ int uffd_read_msg(int ufd, struct uffd_m
return 0;
}
-void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_args *args)
+void uffd_handle_page_fault(uffd_global_test_opts_t *gopts, struct uffd_msg *msg,
+ struct uffd_args *args)
{
unsigned long offset;
@@ -442,7 +461,7 @@ void uffd_handle_page_fault(struct uffd_
if (msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WP) {
/* Write protect page faults */
- wp_range(uffd, msg->arg.pagefault.address, page_size, false);
+ wp_range(gopts->uffd, msg->arg.pagefault.address, gopts->page_size, false);
args->wp_faults++;
} else if (msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_MINOR) {
uint8_t *area;
@@ -460,12 +479,12 @@ void uffd_handle_page_fault(struct uffd_
* (UFFD-registered).
*/
- area = (uint8_t *)(area_dst +
- ((char *)msg->arg.pagefault.address -
- area_dst_alias));
- for (b = 0; b < page_size; ++b)
+ area = (uint8_t *)(gopts->area_dst +
+ ((char *)msg->arg.pagefault.address -
+ gopts->area_dst_alias));
+ for (b = 0; b < gopts->page_size; ++b)
area[b] = ~area[b];
- continue_range(uffd, msg->arg.pagefault.address, page_size,
+ continue_range(gopts->uffd, msg->arg.pagefault.address, gopts->page_size,
args->apply_wp);
args->minor_faults++;
} else {
@@ -493,10 +512,10 @@ void uffd_handle_page_fault(struct uffd_
if (msg->arg.pagefault.flags & UFFD_PAGEFAULT_FLAG_WRITE)
err("unexpected write fault");
- offset = (char *)(unsigned long)msg->arg.pagefault.address - area_dst;
- offset &= ~(page_size-1);
+ offset = (char *)(unsigned long)msg->arg.pagefault.address - gopts->area_dst;
+ offset &= ~(gopts->page_size-1);
- if (copy_page(uffd, offset, args->apply_wp))
+ if (copy_page(gopts, offset, args->apply_wp))
args->missing_faults++;
}
}
@@ -504,6 +523,7 @@ void uffd_handle_page_fault(struct uffd_
void *uffd_poll_thread(void *arg)
{
struct uffd_args *args = (struct uffd_args *)arg;
+ uffd_global_test_opts_t *gopts = args->gopts;
unsigned long cpu = args->cpu;
struct pollfd pollfd[2];
struct uffd_msg msg;
@@ -514,12 +534,12 @@ void *uffd_poll_thread(void *arg)
if (!args->handle_fault)
args->handle_fault = uffd_handle_page_fault;
- pollfd[0].fd = uffd;
+ pollfd[0].fd = gopts->uffd;
pollfd[0].events = POLLIN;
- pollfd[1].fd = pipefd[cpu*2];
+ pollfd[1].fd = gopts->pipefd[cpu*2];
pollfd[1].events = POLLIN;
- ready_for_fork = true;
+ gopts->ready_for_fork = true;
for (;;) {
ret = poll(pollfd, 2, -1);
@@ -537,30 +557,30 @@ void *uffd_poll_thread(void *arg)
}
if (!(pollfd[0].revents & POLLIN))
err("pollfd[0].revents %d", pollfd[0].revents);
- if (uffd_read_msg(uffd, &msg))
+ if (uffd_read_msg(gopts, &msg))
continue;
switch (msg.event) {
default:
err("unexpected msg event %u\n", msg.event);
break;
case UFFD_EVENT_PAGEFAULT:
- args->handle_fault(&msg, args);
+ args->handle_fault(gopts, &msg, args);
break;
case UFFD_EVENT_FORK:
- close(uffd);
- uffd = msg.arg.fork.ufd;
- pollfd[0].fd = uffd;
+ close(gopts->uffd);
+ gopts->uffd = msg.arg.fork.ufd;
+ pollfd[0].fd = gopts->uffd;
break;
case UFFD_EVENT_REMOVE:
uffd_reg.range.start = msg.arg.remove.start;
uffd_reg.range.len = msg.arg.remove.end -
msg.arg.remove.start;
- if (ioctl(uffd, UFFDIO_UNREGISTER, &uffd_reg.range))
+ if (ioctl(gopts->uffd, UFFDIO_UNREGISTER, &uffd_reg.range))
err("remove failure");
break;
case UFFD_EVENT_REMAP:
- area_remap = area_dst; /* save for later unmap */
- area_dst = (char *)(unsigned long)msg.arg.remap.to;
+ gopts->area_remap = gopts->area_dst; /* save for later unmap */
+ gopts->area_dst = (char *)(unsigned long)msg.arg.remap.to;
break;
}
}
@@ -568,17 +588,18 @@ void *uffd_poll_thread(void *arg)
return NULL;
}
-static void retry_copy_page(int ufd, struct uffdio_copy *uffdio_copy,
+static void retry_copy_page(uffd_global_test_opts_t *gopts, struct uffdio_copy *uffdio_copy,
unsigned long offset)
{
- uffd_test_ops->alias_mapping(&uffdio_copy->dst,
+ uffd_test_ops->alias_mapping(gopts,
+ &uffdio_copy->dst,
uffdio_copy->len,
offset);
- if (ioctl(ufd, UFFDIO_COPY, uffdio_copy)) {
+ if (ioctl(gopts->uffd, UFFDIO_COPY, uffdio_copy)) {
/* real retval in ufdio_copy.copy */
if (uffdio_copy->copy != -EEXIST)
err("UFFDIO_COPY retry error: %"PRId64,
- (int64_t)uffdio_copy->copy);
+ (int64_t)uffdio_copy->copy);
} else {
err("UFFDIO_COPY retry unexpected: %"PRId64,
(int64_t)uffdio_copy->copy);
@@ -597,60 +618,60 @@ static void wake_range(int ufd, unsigned
addr), exit(1);
}
-int __copy_page(int ufd, unsigned long offset, bool retry, bool wp)
+int __copy_page(uffd_global_test_opts_t *gopts, unsigned long offset, bool retry, bool wp)
{
struct uffdio_copy uffdio_copy;
- if (offset >= nr_pages * page_size)
+ if (offset >= gopts->nr_pages * gopts->page_size)
err("unexpected offset %lu\n", offset);
- uffdio_copy.dst = (unsigned long) area_dst + offset;
- uffdio_copy.src = (unsigned long) area_src + offset;
- uffdio_copy.len = page_size;
+ uffdio_copy.dst = (unsigned long) gopts->area_dst + offset;
+ uffdio_copy.src = (unsigned long) gopts->area_src + offset;
+ uffdio_copy.len = gopts->page_size;
if (wp)
uffdio_copy.mode = UFFDIO_COPY_MODE_WP;
else
uffdio_copy.mode = 0;
uffdio_copy.copy = 0;
- if (ioctl(ufd, UFFDIO_COPY, &uffdio_copy)) {
+ if (ioctl(gopts->uffd, UFFDIO_COPY, &uffdio_copy)) {
/* real retval in ufdio_copy.copy */
if (uffdio_copy.copy != -EEXIST)
err("UFFDIO_COPY error: %"PRId64,
(int64_t)uffdio_copy.copy);
- wake_range(ufd, uffdio_copy.dst, page_size);
- } else if (uffdio_copy.copy != page_size) {
+ wake_range(gopts->uffd, uffdio_copy.dst, gopts->page_size);
+ } else if (uffdio_copy.copy != gopts->page_size) {
err("UFFDIO_COPY error: %"PRId64, (int64_t)uffdio_copy.copy);
} else {
- if (test_uffdio_copy_eexist && retry) {
- test_uffdio_copy_eexist = false;
- retry_copy_page(ufd, &uffdio_copy, offset);
+ if (gopts->test_uffdio_copy_eexist && retry) {
+ gopts->test_uffdio_copy_eexist = false;
+ retry_copy_page(gopts, &uffdio_copy, offset);
}
return 1;
}
return 0;
}
-int copy_page(int ufd, unsigned long offset, bool wp)
+int copy_page(uffd_global_test_opts_t *gopts, unsigned long offset, bool wp)
{
- return __copy_page(ufd, offset, false, wp);
+ return __copy_page(gopts, offset, false, wp);
}
-int move_page(int ufd, unsigned long offset, unsigned long len)
+int move_page(uffd_global_test_opts_t *gopts, unsigned long offset, unsigned long len)
{
struct uffdio_move uffdio_move;
- if (offset + len > nr_pages * page_size)
+ if (offset + len > gopts->nr_pages * gopts->page_size)
err("unexpected offset %lu and length %lu\n", offset, len);
- uffdio_move.dst = (unsigned long) area_dst + offset;
- uffdio_move.src = (unsigned long) area_src + offset;
+ uffdio_move.dst = (unsigned long) gopts->area_dst + offset;
+ uffdio_move.src = (unsigned long) gopts->area_src + offset;
uffdio_move.len = len;
uffdio_move.mode = UFFDIO_MOVE_MODE_ALLOW_SRC_HOLES;
uffdio_move.move = 0;
- if (ioctl(ufd, UFFDIO_MOVE, &uffdio_move)) {
+ if (ioctl(gopts->uffd, UFFDIO_MOVE, &uffdio_move)) {
/* real retval in uffdio_move.move */
if (uffdio_move.move != -EEXIST)
err("UFFDIO_MOVE error: %"PRId64,
(int64_t)uffdio_move.move);
- wake_range(ufd, uffdio_move.dst, len);
+ wake_range(gopts->uffd, uffdio_move.dst, len);
} else if (uffdio_move.move != len) {
err("UFFDIO_MOVE error: %"PRId64, (int64_t)uffdio_move.move);
} else
--- a/tools/testing/selftests/mm/uffd-common.h~selftests-mm-uffd-refactor-non-composite-global-vars-into-struct
+++ a/tools/testing/selftests/mm/uffd-common.h
@@ -56,20 +56,17 @@
#define err(fmt, ...) errexit(1, fmt, ##__VA_ARGS__)
-/* pthread_mutex_t starts at page offset 0 */
-#define area_mutex(___area, ___nr) \
- ((pthread_mutex_t *) ((___area) + (___nr)*page_size))
-/*
- * count is placed in the page after pthread_mutex_t naturally aligned
- * to avoid non alignment faults on non-x86 archs.
- */
-#define area_count(___area, ___nr) \
- ((volatile unsigned long long *) ((unsigned long) \
- ((___area) + (___nr)*page_size + \
- sizeof(pthread_mutex_t) + \
- sizeof(unsigned long long) - 1) & \
- ~(unsigned long)(sizeof(unsigned long long) \
- - 1)))
+struct uffd_global_test_opts {
+ unsigned long nr_parallel, nr_pages, nr_pages_per_cpu, page_size;
+ char *area_src, *area_src_alias, *area_dst, *area_dst_alias, *area_remap;
+ int uffd, uffd_flags, finished, *pipefd, test_type;
+ bool map_shared;
+ bool test_uffdio_wp;
+ unsigned long long *count_verify;
+ volatile bool test_uffdio_copy_eexist;
+ atomic_bool ready_for_fork;
+};
+typedef struct uffd_global_test_opts uffd_global_test_opts_t;
/* Userfaultfd test statistics */
struct uffd_args {
@@ -79,50 +76,55 @@ struct uffd_args {
unsigned long missing_faults;
unsigned long wp_faults;
unsigned long minor_faults;
+ struct uffd_global_test_opts *gopts;
/* A custom fault handler; defaults to uffd_handle_page_fault. */
- void (*handle_fault)(struct uffd_msg *msg, struct uffd_args *args);
+ void (*handle_fault)(struct uffd_global_test_opts *gopts,
+ struct uffd_msg *msg,
+ struct uffd_args *args);
};
struct uffd_test_ops {
- int (*allocate_area)(void **alloc_area, bool is_src);
- void (*release_pages)(char *rel_area);
- void (*alias_mapping)(__u64 *start, size_t len, unsigned long offset);
- void (*check_pmd_mapping)(void *p, int expect_nr_hpages);
+ int (*allocate_area)(uffd_global_test_opts_t *gopts, void **alloc_area, bool is_src);
+ void (*release_pages)(uffd_global_test_opts_t *gopts, char *rel_area);
+ void (*alias_mapping)(uffd_global_test_opts_t *gopts,
+ __u64 *start,
+ size_t len,
+ unsigned long offset);
+ void (*check_pmd_mapping)(uffd_global_test_opts_t *gopts, void *p, int expect_nr_hpages);
};
typedef struct uffd_test_ops uffd_test_ops_t;
struct uffd_test_case_ops {
- int (*pre_alloc)(const char **errmsg);
- int (*post_alloc)(const char **errmsg);
+ int (*pre_alloc)(uffd_global_test_opts_t *gopts, const char **errmsg);
+ int (*post_alloc)(uffd_global_test_opts_t *gopts, const char **errmsg);
};
typedef struct uffd_test_case_ops uffd_test_case_ops_t;
-extern unsigned long nr_parallel, nr_pages, nr_pages_per_cpu, page_size;
-extern char *area_src, *area_src_alias, *area_dst, *area_dst_alias, *area_remap;
-extern int uffd, uffd_flags, finished, *pipefd, test_type;
-extern bool map_shared;
-extern bool test_uffdio_wp;
-extern unsigned long long *count_verify;
-extern volatile bool test_uffdio_copy_eexist;
-extern atomic_bool ready_for_fork;
-
+extern uffd_global_test_opts_t *uffd_gtest_opts;
extern uffd_test_ops_t anon_uffd_test_ops;
extern uffd_test_ops_t shmem_uffd_test_ops;
extern uffd_test_ops_t hugetlb_uffd_test_ops;
extern uffd_test_ops_t *uffd_test_ops;
extern uffd_test_case_ops_t *uffd_test_case_ops;
+pthread_mutex_t *area_mutex(char *area, unsigned long nr, uffd_global_test_opts_t *gopts);
+volatile unsigned long long *area_count(char *area,
+ unsigned long nr,
+ uffd_global_test_opts_t *gopts);
+
void uffd_stats_report(struct uffd_args *args, int n_cpus);
-int uffd_test_ctx_init(uint64_t features, const char **errmsg);
-void uffd_test_ctx_clear(void);
-int userfaultfd_open(uint64_t *features);
-int uffd_read_msg(int ufd, struct uffd_msg *msg);
+int uffd_test_ctx_init(uffd_global_test_opts_t *gopts, uint64_t features, const char **errmsg);
+void uffd_test_ctx_clear(uffd_global_test_opts_t *gopts);
+int userfaultfd_open(uffd_global_test_opts_t *gopts, uint64_t *features);
+int uffd_read_msg(uffd_global_test_opts_t *gopts, struct uffd_msg *msg);
void wp_range(int ufd, __u64 start, __u64 len, bool wp);
-void uffd_handle_page_fault(struct uffd_msg *msg, struct uffd_args *args);
-int __copy_page(int ufd, unsigned long offset, bool retry, bool wp);
-int copy_page(int ufd, unsigned long offset, bool wp);
-int move_page(int ufd, unsigned long offset, unsigned long len);
+void uffd_handle_page_fault(uffd_global_test_opts_t *gopts,
+ struct uffd_msg *msg,
+ struct uffd_args *args);
+int __copy_page(uffd_global_test_opts_t *gopts, unsigned long offset, bool retry, bool wp);
+int copy_page(uffd_global_test_opts_t *gopts, unsigned long offset, bool wp);
+int move_page(uffd_global_test_opts_t *gopts, unsigned long offset, unsigned long len);
void *uffd_poll_thread(void *arg);
int uffd_open_dev(unsigned int flags);
--- a/tools/testing/selftests/mm/uffd-stress.c~selftests-mm-uffd-refactor-non-composite-global-vars-into-struct
+++ a/tools/testing/selftests/mm/uffd-stress.c
@@ -44,6 +44,12 @@ uint64_t features;
#define BOUNCE_VERIFY (1<<2)
#define BOUNCE_POLL (1<<3)
static int bounces;
+/* defined globally for this particular test as the sigalrm handler
+ * depends on test_uffdio_*_eexist.
+ * XXX: define gopts in main() when we figure out a way to deal with
+ * test_uffdio_*_eexist.
+ */
+static uffd_global_test_opts_t *gopts;
/* exercise the test_uffdio_*_eexist every ALARM_INTERVAL_SECS */
#define ALARM_INTERVAL_SECS 10
@@ -76,54 +82,58 @@ static void usage(void)
exit(1);
}
-static void uffd_stats_reset(struct uffd_args *args, unsigned long n_cpus)
+static void uffd_stats_reset(uffd_global_test_opts_t *gopts, struct uffd_args *args,
+ unsigned long n_cpus)
{
int i;
for (i = 0; i < n_cpus; i++) {
args[i].cpu = i;
- args[i].apply_wp = test_uffdio_wp;
+ args[i].apply_wp = gopts->test_uffdio_wp;
args[i].missing_faults = 0;
args[i].wp_faults = 0;
args[i].minor_faults = 0;
+ args[i].gopts = gopts;
}
}
static void *locking_thread(void *arg)
{
- unsigned long cpu = (unsigned long) arg;
+ struct uffd_args *args = (struct uffd_args *) arg;
+ uffd_global_test_opts_t *gopts = args->gopts;
+ unsigned long cpu = (unsigned long) args->cpu;
unsigned long page_nr;
unsigned long long count;
if (!(bounces & BOUNCE_RANDOM)) {
page_nr = -bounces;
if (!(bounces & BOUNCE_RACINGFAULTS))
- page_nr += cpu * nr_pages_per_cpu;
+ page_nr += cpu * gopts->nr_pages_per_cpu;
}
- while (!finished) {
+ while (!gopts->finished) {
if (bounces & BOUNCE_RANDOM) {
if (getrandom(&page_nr, sizeof(page_nr), 0) != sizeof(page_nr))
err("getrandom failed");
} else
page_nr += 1;
- page_nr %= nr_pages;
- pthread_mutex_lock(area_mutex(area_dst, page_nr));
- count = *area_count(area_dst, page_nr);
- if (count != count_verify[page_nr])
+ page_nr %= gopts->nr_pages;
+ pthread_mutex_lock(area_mutex(gopts->area_dst, page_nr, gopts));
+ count = *area_count(gopts->area_dst, page_nr, gopts);
+ if (count != gopts->count_verify[page_nr])
err("page_nr %lu memory corruption %llu %llu",
- page_nr, count, count_verify[page_nr]);
+ page_nr, count, gopts->count_verify[page_nr]);
count++;
- *area_count(area_dst, page_nr) = count_verify[page_nr] = count;
- pthread_mutex_unlock(area_mutex(area_dst, page_nr));
+ *area_count(gopts->area_dst, page_nr, gopts) = gopts->count_verify[page_nr] = count;
+ pthread_mutex_unlock(area_mutex(gopts->area_dst, page_nr, gopts));
}
return NULL;
}
-static int copy_page_retry(int ufd, unsigned long offset)
+static int copy_page_retry(uffd_global_test_opts_t *gopts, unsigned long offset)
{
- return __copy_page(ufd, offset, true, test_uffdio_wp);
+ return __copy_page(gopts, offset, true, gopts->test_uffdio_wp);
}
pthread_mutex_t uffd_read_mutex = PTHREAD_MUTEX_INITIALIZER;
@@ -131,15 +141,16 @@ pthread_mutex_t uffd_read_mutex = PTHREA
static void *uffd_read_thread(void *arg)
{
struct uffd_args *args = (struct uffd_args *)arg;
+ uffd_global_test_opts_t *gopts = args->gopts;
struct uffd_msg msg;
pthread_mutex_unlock(&uffd_read_mutex);
/* from here cancellation is ok */
for (;;) {
- if (uffd_read_msg(uffd, &msg))
+ if (uffd_read_msg(gopts, &msg))
continue;
- uffd_handle_page_fault(&msg, args);
+ uffd_handle_page_fault(gopts, &msg, args);
}
return NULL;
@@ -147,32 +158,34 @@ static void *uffd_read_thread(void *arg)
static void *background_thread(void *arg)
{
- unsigned long cpu = (unsigned long) arg;
+ struct uffd_args *args = (struct uffd_args *) arg;
+ uffd_global_test_opts_t *gopts = args->gopts;
+ unsigned long cpu = (unsigned long) args->cpu;
unsigned long page_nr, start_nr, mid_nr, end_nr;
- start_nr = cpu * nr_pages_per_cpu;
- end_nr = (cpu+1) * nr_pages_per_cpu;
+ start_nr = cpu * gopts->nr_pages_per_cpu;
+ end_nr = (cpu+1) * gopts->nr_pages_per_cpu;
mid_nr = (start_nr + end_nr) / 2;
/* Copy the first half of the pages */
for (page_nr = start_nr; page_nr < mid_nr; page_nr++)
- copy_page_retry(uffd, page_nr * page_size);
+ copy_page_retry(gopts, page_nr * gopts->page_size);
/*
* If we need to test uffd-wp, set it up now. Then we'll have
* at least the first half of the pages mapped already which
* can be write-protected for testing
*/
- if (test_uffdio_wp)
- wp_range(uffd, (unsigned long)area_dst + start_nr * page_size,
- nr_pages_per_cpu * page_size, true);
+ if (gopts->test_uffdio_wp)
+ wp_range(gopts->uffd, (unsigned long)gopts->area_dst + start_nr * gopts->page_size,
+ gopts->nr_pages_per_cpu * gopts->page_size, true);
/*
* Continue the 2nd half of the page copying, handling write
* protection faults if any
*/
for (page_nr = mid_nr; page_nr < end_nr; page_nr++)
- copy_page_retry(uffd, page_nr * page_size);
+ copy_page_retry(gopts, page_nr * gopts->page_size);
return NULL;
}
@@ -180,17 +193,21 @@ static void *background_thread(void *arg
static int stress(struct uffd_args *args)
{
unsigned long cpu;
- pthread_t locking_threads[nr_parallel];
- pthread_t uffd_threads[nr_parallel];
- pthread_t background_threads[nr_parallel];
+ uffd_global_test_opts_t *gopts = args->gopts;
+ pthread_t locking_threads[gopts->nr_parallel];
+ pthread_t uffd_threads[gopts->nr_parallel];
+ pthread_t background_threads[gopts->nr_parallel];
- finished = 0;
- for (cpu = 0; cpu < nr_parallel; cpu++) {
+ gopts->finished = 0;
+ for (cpu = 0; cpu < gopts->nr_parallel; cpu++) {
if (pthread_create(&locking_threads[cpu], &attr,
- locking_thread, (void *)cpu))
+ locking_thread, (void *)&args[cpu]))
return 1;
if (bounces & BOUNCE_POLL) {
- if (pthread_create(&uffd_threads[cpu], &attr, uffd_poll_thread, &args[cpu]))
+ if (pthread_create(&uffd_threads[cpu],
+ &attr,
+ uffd_poll_thread,
+ (void *) &args[cpu]))
err("uffd_poll_thread create");
} else {
if (pthread_create(&uffd_threads[cpu], &attr,
@@ -200,10 +217,10 @@ static int stress(struct uffd_args *args
pthread_mutex_lock(&uffd_read_mutex);
}
if (pthread_create(&background_threads[cpu], &attr,
- background_thread, (void *)cpu))
+ background_thread, (void *)&args[cpu]))
return 1;
}
- for (cpu = 0; cpu < nr_parallel; cpu++)
+ for (cpu = 0; cpu < gopts->nr_parallel; cpu++)
if (pthread_join(background_threads[cpu], NULL))
return 1;
@@ -216,17 +233,17 @@ static int stress(struct uffd_args *args
* UFFDIO_COPY without writing zero pages into area_dst
* because the background threads already completed).
*/
- uffd_test_ops->release_pages(area_src);
+ uffd_test_ops->release_pages(gopts, gopts->area_src);
- finished = 1;
- for (cpu = 0; cpu < nr_parallel; cpu++)
+ gopts->finished = 1;
+ for (cpu = 0; cpu < gopts->nr_parallel; cpu++)
if (pthread_join(locking_threads[cpu], NULL))
return 1;
- for (cpu = 0; cpu < nr_parallel; cpu++) {
+ for (cpu = 0; cpu < gopts->nr_parallel; cpu++) {
char c;
if (bounces & BOUNCE_POLL) {
- if (write(pipefd[cpu*2+1], &c, 1) != 1)
+ if (write(gopts->pipefd[cpu*2+1], &c, 1) != 1)
err("pipefd write error");
if (pthread_join(uffd_threads[cpu],
(void *)&args[cpu]))
@@ -242,26 +259,26 @@ static int stress(struct uffd_args *args
return 0;
}
-static int userfaultfd_stress(void)
+static int userfaultfd_stress(uffd_global_test_opts_t *gopts)
{
void *area;
unsigned long nr;
- struct uffd_args args[nr_parallel];
- uint64_t mem_size = nr_pages * page_size;
+ struct uffd_args args[gopts->nr_parallel];
+ uint64_t mem_size = gopts->nr_pages * gopts->page_size;
int flags = 0;
- memset(args, 0, sizeof(struct uffd_args) * nr_parallel);
+ memset(args, 0, sizeof(struct uffd_args) * gopts->nr_parallel);
- if (features & UFFD_FEATURE_WP_UNPOPULATED && test_type == TEST_ANON)
+ if (features & UFFD_FEATURE_WP_UNPOPULATED && gopts->test_type == TEST_ANON)
flags = UFFD_FEATURE_WP_UNPOPULATED;
- if (uffd_test_ctx_init(flags, NULL))
+ if (uffd_test_ctx_init(gopts, flags, NULL))
err("context init failed");
- if (posix_memalign(&area, page_size, page_size))
+ if (posix_memalign(&area, gopts->page_size, gopts->page_size))
err("out of memory");
zeropage = area;
- bzero(zeropage, page_size);
+ bzero(zeropage, gopts->page_size);
pthread_mutex_lock(&uffd_read_mutex);
@@ -284,18 +301,18 @@ static int userfaultfd_stress(void)
fflush(stdout);
if (bounces & BOUNCE_POLL)
- fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);
+ fcntl(gopts->uffd, F_SETFL, gopts->uffd_flags | O_NONBLOCK);
else
- fcntl(uffd, F_SETFL, uffd_flags & ~O_NONBLOCK);
+ fcntl(gopts->uffd, F_SETFL, gopts->uffd_flags & ~O_NONBLOCK);
/* register */
- if (uffd_register(uffd, area_dst, mem_size,
- true, test_uffdio_wp, false))
+ if (uffd_register(gopts->uffd, gopts->area_dst, mem_size,
+ true, gopts->test_uffdio_wp, false))
err("register failure");
- if (area_dst_alias) {
- if (uffd_register(uffd, area_dst_alias, mem_size,
- true, test_uffdio_wp, false))
+ if (gopts->area_dst_alias) {
+ if (uffd_register(gopts->uffd, gopts->area_dst_alias, mem_size,
+ true, gopts->test_uffdio_wp, false))
err("register failure alias");
}
@@ -323,87 +340,88 @@ static int userfaultfd_stress(void)
* MADV_DONTNEED only after the UFFDIO_REGISTER, so it's
* required to MADV_DONTNEED here.
*/
- uffd_test_ops->release_pages(area_dst);
+ uffd_test_ops->release_pages(gopts, gopts->area_dst);
- uffd_stats_reset(args, nr_parallel);
+ uffd_stats_reset(gopts, args, gopts->nr_parallel);
/* bounce pass */
if (stress(args)) {
- uffd_test_ctx_clear();
+ uffd_test_ctx_clear(gopts);
return 1;
}
/* Clear all the write protections if there is any */
- if (test_uffdio_wp)
- wp_range(uffd, (unsigned long)area_dst,
- nr_pages * page_size, false);
+ if (gopts->test_uffdio_wp)
+ wp_range(gopts->uffd, (unsigned long)gopts->area_dst,
+ gopts->nr_pages * gopts->page_size, false);
/* unregister */
- if (uffd_unregister(uffd, area_dst, mem_size))
+ if (uffd_unregister(gopts->uffd, gopts->area_dst, mem_size))
err("unregister failure");
- if (area_dst_alias) {
- if (uffd_unregister(uffd, area_dst_alias, mem_size))
+ if (gopts->area_dst_alias) {
+ if (uffd_unregister(gopts->uffd, gopts->area_dst_alias, mem_size))
err("unregister failure alias");
}
/* verification */
if (bounces & BOUNCE_VERIFY)
- for (nr = 0; nr < nr_pages; nr++)
- if (*area_count(area_dst, nr) != count_verify[nr])
+ for (nr = 0; nr < gopts->nr_pages; nr++)
+ if (*area_count(gopts->area_dst, nr, gopts) !=
+ gopts->count_verify[nr])
err("error area_count %llu %llu %lu\n",
- *area_count(area_src, nr),
- count_verify[nr], nr);
+ *area_count(gopts->area_src, nr, gopts),
+ gopts->count_verify[nr], nr);
/* prepare next bounce */
- swap(area_src, area_dst);
+ swap(gopts->area_src, gopts->area_dst);
- swap(area_src_alias, area_dst_alias);
+ swap(gopts->area_src_alias, gopts->area_dst_alias);
- uffd_stats_report(args, nr_parallel);
+ uffd_stats_report(args, gopts->nr_parallel);
}
- uffd_test_ctx_clear();
+ uffd_test_ctx_clear(gopts);
return 0;
}
-static void set_test_type(const char *type)
+static void set_test_type(uffd_global_test_opts_t *gopts, const char *type)
{
if (!strcmp(type, "anon")) {
- test_type = TEST_ANON;
+ gopts->test_type = TEST_ANON;
uffd_test_ops = &anon_uffd_test_ops;
} else if (!strcmp(type, "hugetlb")) {
- test_type = TEST_HUGETLB;
+ gopts->test_type = TEST_HUGETLB;
uffd_test_ops = &hugetlb_uffd_test_ops;
- map_shared = true;
+ gopts->map_shared = true;
} else if (!strcmp(type, "hugetlb-private")) {
- test_type = TEST_HUGETLB;
+ gopts->test_type = TEST_HUGETLB;
uffd_test_ops = &hugetlb_uffd_test_ops;
} else if (!strcmp(type, "shmem")) {
- map_shared = true;
- test_type = TEST_SHMEM;
+ gopts->map_shared = true;
+ gopts->test_type = TEST_SHMEM;
uffd_test_ops = &shmem_uffd_test_ops;
} else if (!strcmp(type, "shmem-private")) {
- test_type = TEST_SHMEM;
+ gopts->test_type = TEST_SHMEM;
uffd_test_ops = &shmem_uffd_test_ops;
}
}
-static void parse_test_type_arg(const char *raw_type)
+static void parse_test_type_arg(uffd_global_test_opts_t *gopts, const char *raw_type)
{
- set_test_type(raw_type);
+ set_test_type(gopts, raw_type);
- if (!test_type)
+ if (!gopts->test_type)
err("failed to parse test type argument: '%s'", raw_type);
- if (test_type == TEST_HUGETLB)
- page_size = default_huge_page_size();
+ if (gopts->test_type == TEST_HUGETLB)
+ gopts->page_size = default_huge_page_size();
else
- page_size = sysconf(_SC_PAGE_SIZE);
+ gopts->page_size = sysconf(_SC_PAGE_SIZE);
- if (!page_size)
+ if (!gopts->page_size)
err("Unable to determine page size");
- if ((unsigned long) area_count(NULL, 0) + sizeof(unsigned long long) * 2
- > page_size)
+ if ((unsigned long) area_count(NULL, 0, gopts) + sizeof(unsigned long long) * 2
+ > gopts->page_size)
err("Impossible to run this test");
/*
@@ -415,21 +433,21 @@ static void parse_test_type_arg(const ch
if (uffd_get_features(&features) && errno == ENOENT)
ksft_exit_skip("failed to get available features (%d)\n", errno);
- test_uffdio_wp = test_uffdio_wp &&
+ gopts->test_uffdio_wp = gopts->test_uffdio_wp &&
(features & UFFD_FEATURE_PAGEFAULT_FLAG_WP);
- if (test_type != TEST_ANON && !(features & UFFD_FEATURE_WP_HUGETLBFS_SHMEM))
- test_uffdio_wp = false;
+ if (gopts->test_type != TEST_ANON && !(features & UFFD_FEATURE_WP_HUGETLBFS_SHMEM))
+ gopts->test_uffdio_wp = false;
- close(uffd);
- uffd = -1;
+ close(gopts->uffd);
+ gopts->uffd = -1;
}
static void sigalrm(int sig)
{
if (sig != SIGALRM)
abort();
- test_uffdio_copy_eexist = true;
+ gopts->test_uffdio_copy_eexist = true;
alarm(ALARM_INTERVAL_SECS);
}
@@ -438,6 +456,8 @@ int main(int argc, char **argv)
unsigned long nr_cpus;
size_t bytes;
+ gopts = (uffd_global_test_opts_t *) malloc(sizeof(uffd_global_test_opts_t));
+
if (argc < 4)
usage();
@@ -445,7 +465,7 @@ int main(int argc, char **argv)
err("failed to arm SIGALRM");
alarm(ALARM_INTERVAL_SECS);
- parse_test_type_arg(argv[1]);
+ parse_test_type_arg(gopts, argv[1]);
bytes = atol(argv[2]) * 1024 * 1024;
nr_cpus = sysconf(_SC_NPROCESSORS_ONLN);
@@ -453,9 +473,9 @@ int main(int argc, char **argv)
/* Don't let calculation below go to zero. */
ksft_print_msg("_SC_NPROCESSORS_ONLN (%lu) too large, capping nr_threads to 32\n",
nr_cpus);
- nr_parallel = 32;
+ gopts->nr_parallel = 32;
} else {
- nr_parallel = nr_cpus;
+ gopts->nr_parallel = nr_cpus;
}
/*
@@ -463,16 +483,16 @@ int main(int argc, char **argv)
* Ensure nr_parallel - 1 hugepages on top of that to account
* for racy extra reservation of hugepages.
*/
- if (test_type == TEST_HUGETLB &&
- get_free_hugepages() < 2 * (bytes / page_size) + nr_parallel - 1) {
+ if (gopts->test_type == TEST_HUGETLB &&
+ get_free_hugepages() < 2 * (bytes / gopts->page_size) + gopts->nr_parallel - 1) {
printf("skip: Skipping userfaultfd... not enough hugepages\n");
return KSFT_SKIP;
}
- nr_pages_per_cpu = bytes / page_size / nr_parallel;
- if (!nr_pages_per_cpu) {
+ gopts->nr_pages_per_cpu = bytes / gopts->page_size / gopts->nr_parallel;
+ if (!gopts->nr_pages_per_cpu) {
_err("pages_per_cpu = 0, cannot test (%lu / %lu / %lu)",
- bytes, page_size, nr_parallel);
+ bytes, gopts->page_size, gopts->nr_parallel);
usage();
}
@@ -481,11 +501,11 @@ int main(int argc, char **argv)
_err("invalid bounces");
usage();
}
- nr_pages = nr_pages_per_cpu * nr_parallel;
+ gopts->nr_pages = gopts->nr_pages_per_cpu * gopts->nr_parallel;
printf("nr_pages: %lu, nr_pages_per_cpu: %lu\n",
- nr_pages, nr_pages_per_cpu);
- return userfaultfd_stress();
+ gopts->nr_pages, gopts->nr_pages_per_cpu);
+ return userfaultfd_stress(gopts);
}
#else /* __NR_userfaultfd */
--- a/tools/testing/selftests/mm/uffd-unit-tests.c~selftests-mm-uffd-refactor-non-composite-global-vars-into-struct
+++ a/tools/testing/selftests/mm/uffd-unit-tests.c
@@ -76,7 +76,7 @@ struct uffd_test_args {
typedef struct uffd_test_args uffd_test_args_t;
/* Returns: UFFD_TEST_* */
-typedef void (*uffd_test_fn)(uffd_test_args_t *);
+typedef void (*uffd_test_fn)(uffd_global_test_opts_t *, uffd_test_args_t *);
typedef struct {
const char *name;
@@ -181,33 +181,6 @@ out:
return 1;
}
-/*
- * This function initializes the global variables. TODO: remove global
- * vars and then remove this.
- */
-static int
-uffd_setup_environment(uffd_test_args_t *args, uffd_test_case_t *test,
- mem_type_t *mem_type, const char **errmsg)
-{
- map_shared = mem_type->shared;
- uffd_test_ops = mem_type->mem_ops;
- uffd_test_case_ops = test->test_case_ops;
-
- if (mem_type->mem_flag & (MEM_HUGETLB_PRIVATE | MEM_HUGETLB))
- page_size = default_huge_page_size();
- else
- page_size = psize();
-
- /* Ensure we have at least 2 pages */
- nr_pages = MAX(UFFD_TEST_MEM_SIZE, page_size * 2) / page_size;
- /* TODO: remove this global var.. it's so ugly */
- nr_parallel = 1;
-
- /* Initialize test arguments */
- args->mem_type = mem_type;
-
- return uffd_test_ctx_init(test->uffd_feature_required, errmsg);
-}
static bool uffd_feature_supported(uffd_test_case_t *test)
{
@@ -237,7 +210,8 @@ static int pagemap_open(void)
} while (0)
typedef struct {
- int parent_uffd, child_uffd;
+ uffd_global_test_opts_t *gopts;
+ int child_uffd;
} fork_event_args;
static void *fork_event_consumer(void *data)
@@ -245,10 +219,10 @@ static void *fork_event_consumer(void *d
fork_event_args *args = data;
struct uffd_msg msg = { 0 };
- ready_for_fork = true;
+ args->gopts->ready_for_fork = true;
/* Read until a full msg received */
- while (uffd_read_msg(args->parent_uffd, &msg));
+ while (uffd_read_msg(args->gopts, &msg));
if (msg.event != UFFD_EVENT_FORK)
err("wrong message: %u\n", msg.event);
@@ -304,9 +278,9 @@ static void unpin_pages(pin_args *args)
args->pinned = false;
}
-static int pagemap_test_fork(int uffd, bool with_event, bool test_pin)
+static int pagemap_test_fork(uffd_global_test_opts_t *gopts, bool with_event, bool test_pin)
{
- fork_event_args args = { .parent_uffd = uffd, .child_uffd = -1 };
+ fork_event_args args = { .gopts = gopts, .child_uffd = -1 };
pthread_t thread;
pid_t child;
uint64_t value;
@@ -314,10 +288,10 @@ static int pagemap_test_fork(int uffd, b
/* Prepare a thread to resolve EVENT_FORK */
if (with_event) {
- ready_for_fork = false;
+ gopts->ready_for_fork = false;
if (pthread_create(&thread, NULL, fork_event_consumer, &args))
err("pthread_create()");
- while (!ready_for_fork)
+ while (!gopts->ready_for_fork)
; /* Wait for the poll_thread to start executing before forking */
}
@@ -328,14 +302,14 @@ static int pagemap_test_fork(int uffd, b
fd = pagemap_open();
- if (test_pin && pin_pages(&args, area_dst, page_size))
+ if (test_pin && pin_pages(&args, gopts->area_dst, gopts->page_size))
/*
* Normally when reach here we have pinned in
* previous tests, so shouldn't fail anymore
*/
err("pin page failed in child");
- value = pagemap_get_entry(fd, area_dst);
+ value = pagemap_get_entry(fd, gopts->area_dst);
/*
* After fork(), we should handle uffd-wp bit differently:
*
@@ -361,70 +335,70 @@ static int pagemap_test_fork(int uffd, b
return result;
}
-static void uffd_wp_unpopulated_test(uffd_test_args_t *args)
+static void uffd_wp_unpopulated_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
uint64_t value;
int pagemap_fd;
- if (uffd_register(uffd, area_dst, nr_pages * page_size,
+ if (uffd_register(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size,
false, true, false))
err("register failed");
pagemap_fd = pagemap_open();
/* Test applying pte marker to anon unpopulated */
- wp_range(uffd, (uint64_t)area_dst, page_size, true);
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ wp_range(gopts->uffd, (uint64_t)gopts->area_dst, gopts->page_size, true);
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, true);
/* Test unprotect on anon pte marker */
- wp_range(uffd, (uint64_t)area_dst, page_size, false);
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ wp_range(gopts->uffd, (uint64_t)gopts->area_dst, gopts->page_size, false);
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, false);
/* Test zap on anon marker */
- wp_range(uffd, (uint64_t)area_dst, page_size, true);
- if (madvise(area_dst, page_size, MADV_DONTNEED))
+ wp_range(gopts->uffd, (uint64_t)gopts->area_dst, gopts->page_size, true);
+ if (madvise(gopts->area_dst, gopts->page_size, MADV_DONTNEED))
err("madvise(MADV_DONTNEED) failed");
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, false);
/* Test fault in after marker removed */
- *area_dst = 1;
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ *gopts->area_dst = 1;
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, false);
/* Drop it to make pte none again */
- if (madvise(area_dst, page_size, MADV_DONTNEED))
+ if (madvise(gopts->area_dst, gopts->page_size, MADV_DONTNEED))
err("madvise(MADV_DONTNEED) failed");
/* Test read-zero-page upon pte marker */
- wp_range(uffd, (uint64_t)area_dst, page_size, true);
- *(volatile char *)area_dst;
+ wp_range(gopts->uffd, (uint64_t)gopts->area_dst, gopts->page_size, true);
+ *(volatile char *)gopts->area_dst;
/* Drop it to make pte none again */
- if (madvise(area_dst, page_size, MADV_DONTNEED))
+ if (madvise(gopts->area_dst, gopts->page_size, MADV_DONTNEED))
err("madvise(MADV_DONTNEED) failed");
uffd_test_pass();
}
-static void uffd_wp_fork_test_common(uffd_test_args_t *args,
+static void uffd_wp_fork_test_common(uffd_global_test_opts_t *gopts, uffd_test_args_t *args,
bool with_event)
{
int pagemap_fd;
uint64_t value;
- if (uffd_register(uffd, area_dst, nr_pages * page_size,
+ if (uffd_register(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size,
false, true, false))
err("register failed");
pagemap_fd = pagemap_open();
/* Touch the page */
- *area_dst = 1;
- wp_range(uffd, (uint64_t)area_dst, page_size, true);
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ *gopts->area_dst = 1;
+ wp_range(gopts->uffd, (uint64_t)gopts->area_dst, gopts->page_size, true);
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, true);
- if (pagemap_test_fork(uffd, with_event, false)) {
+ if (pagemap_test_fork(gopts, with_event, false)) {
uffd_test_fail("Detected %s uffd-wp bit in child in present pte",
with_event ? "missing" : "stall");
goto out;
@@ -442,79 +416,80 @@ static void uffd_wp_fork_test_common(uff
* to expose pte markers.
*/
if (args->mem_type->shared) {
- if (madvise(area_dst, page_size, MADV_DONTNEED))
+ if (madvise(gopts->area_dst, gopts->page_size, MADV_DONTNEED))
err("MADV_DONTNEED");
} else {
/*
* NOTE: ignore retval because private-hugetlb doesn't yet
* support swapping, so it could fail.
*/
- madvise(area_dst, page_size, MADV_PAGEOUT);
+ madvise(gopts->area_dst, gopts->page_size, MADV_PAGEOUT);
}
/* Uffd-wp should persist even swapped out */
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, true);
- if (pagemap_test_fork(uffd, with_event, false)) {
+ if (pagemap_test_fork(gopts, with_event, false)) {
uffd_test_fail("Detected %s uffd-wp bit in child in zapped pte",
with_event ? "missing" : "stall");
goto out;
}
/* Unprotect; this tests swap pte modifications */
- wp_range(uffd, (uint64_t)area_dst, page_size, false);
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ wp_range(gopts->uffd, (uint64_t)gopts->area_dst, gopts->page_size, false);
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, false);
/* Fault in the page from disk */
- *area_dst = 2;
- value = pagemap_get_entry(pagemap_fd, area_dst);
+ *gopts->area_dst = 2;
+ value = pagemap_get_entry(pagemap_fd, gopts->area_dst);
pagemap_check_wp(value, false);
uffd_test_pass();
out:
- if (uffd_unregister(uffd, area_dst, nr_pages * page_size))
+ if (uffd_unregister(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size))
err("unregister failed");
close(pagemap_fd);
}
-static void uffd_wp_fork_test(uffd_test_args_t *args)
+static void uffd_wp_fork_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_wp_fork_test_common(args, false);
+ uffd_wp_fork_test_common(gopts, args, false);
}
-static void uffd_wp_fork_with_event_test(uffd_test_args_t *args)
+static void uffd_wp_fork_with_event_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_wp_fork_test_common(args, true);
+ uffd_wp_fork_test_common(gopts, args, true);
}
-static void uffd_wp_fork_pin_test_common(uffd_test_args_t *args,
+static void uffd_wp_fork_pin_test_common(uffd_global_test_opts_t *gopts,
+ uffd_test_args_t *args,
bool with_event)
{
int pagemap_fd;
pin_args pin_args = {};
- if (uffd_register(uffd, area_dst, page_size, false, true, false))
+ if (uffd_register(gopts->uffd, gopts->area_dst, gopts->page_size, false, true, false))
err("register failed");
pagemap_fd = pagemap_open();
/* Touch the page */
- *area_dst = 1;
- wp_range(uffd, (uint64_t)area_dst, page_size, true);
+ *gopts->area_dst = 1;
+ wp_range(gopts->uffd, (uint64_t)gopts->area_dst, gopts->page_size, true);
/*
* 1. First pin, then fork(). This tests fork() special path when
* doing early CoW if the page is private.
*/
- if (pin_pages(&pin_args, area_dst, page_size)) {
+ if (pin_pages(&pin_args, gopts->area_dst, gopts->page_size)) {
uffd_test_skip("Possibly CONFIG_GUP_TEST missing "
"or unprivileged");
close(pagemap_fd);
- uffd_unregister(uffd, area_dst, page_size);
+ uffd_unregister(gopts->uffd, gopts->area_dst, gopts->page_size);
return;
}
- if (pagemap_test_fork(uffd, with_event, false)) {
+ if (pagemap_test_fork(gopts, with_event, false)) {
uffd_test_fail("Detected %s uffd-wp bit in early CoW of fork()",
with_event ? "missing" : "stall");
unpin_pages(&pin_args);
@@ -527,49 +502,50 @@ static void uffd_wp_fork_pin_test_common
* 2. First fork(), then pin (in the child, where test_pin==true).
* This tests COR, aka, page unsharing on private memories.
*/
- if (pagemap_test_fork(uffd, with_event, true)) {
+ if (pagemap_test_fork(gopts, with_event, true)) {
uffd_test_fail("Detected %s uffd-wp bit when RO pin",
with_event ? "missing" : "stall");
goto out;
}
uffd_test_pass();
out:
- if (uffd_unregister(uffd, area_dst, page_size))
+ if (uffd_unregister(gopts->uffd, gopts->area_dst, gopts->page_size))
err("register failed");
close(pagemap_fd);
}
-static void uffd_wp_fork_pin_test(uffd_test_args_t *args)
+static void uffd_wp_fork_pin_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_wp_fork_pin_test_common(args, false);
+ uffd_wp_fork_pin_test_common(gopts, args, false);
}
-static void uffd_wp_fork_pin_with_event_test(uffd_test_args_t *args)
+static void uffd_wp_fork_pin_with_event_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_wp_fork_pin_test_common(args, true);
+ uffd_wp_fork_pin_test_common(gopts, args, true);
}
-static void check_memory_contents(char *p)
+static void check_memory_contents(uffd_global_test_opts_t *gopts, char *p)
{
unsigned long i, j;
uint8_t expected_byte;
- for (i = 0; i < nr_pages; ++i) {
+ for (i = 0; i < gopts->nr_pages; ++i) {
expected_byte = ~((uint8_t)(i % ((uint8_t)-1)));
- for (j = 0; j < page_size; j++) {
- uint8_t v = *(uint8_t *)(p + (i * page_size) + j);
+ for (j = 0; j < gopts->page_size; j++) {
+ uint8_t v = *(uint8_t *)(p + (i * gopts->page_size) + j);
if (v != expected_byte)
err("unexpected page contents");
}
}
}
-static void uffd_minor_test_common(bool test_collapse, bool test_wp)
+static void uffd_minor_test_common(uffd_global_test_opts_t *gopts, bool test_collapse, bool test_wp)
{
unsigned long p;
pthread_t uffd_mon;
char c;
struct uffd_args args = { 0 };
+ args.gopts = gopts;
/*
* NOTE: MADV_COLLAPSE is not yet compatible with WP, so testing
@@ -577,7 +553,7 @@ static void uffd_minor_test_common(bool
*/
assert(!(test_collapse && test_wp));
- if (uffd_register(uffd, area_dst_alias, nr_pages * page_size,
+ if (uffd_register(gopts->uffd, gopts->area_dst_alias, gopts->nr_pages * gopts->page_size,
/* NOTE! MADV_COLLAPSE may not work with uffd-wp */
false, test_wp, true))
err("register failure");
@@ -586,9 +562,9 @@ static void uffd_minor_test_common(bool
* After registering with UFFD, populate the non-UFFD-registered side of
* the shared mapping. This should *not* trigger any UFFD minor faults.
*/
- for (p = 0; p < nr_pages; ++p)
- memset(area_dst + (p * page_size), p % ((uint8_t)-1),
- page_size);
+ for (p = 0; p < gopts->nr_pages; ++p)
+ memset(gopts->area_dst + (p * gopts->page_size), p % ((uint8_t)-1),
+ gopts->page_size);
args.apply_wp = test_wp;
if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args))
@@ -600,50 +576,51 @@ static void uffd_minor_test_common(bool
* fault. uffd_poll_thread will resolve the fault by bit-flipping the
* page's contents, and then issuing a CONTINUE ioctl.
*/
- check_memory_contents(area_dst_alias);
+ check_memory_contents(gopts, gopts->area_dst_alias);
- if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))
+ if (write(gopts->pipefd[1], &c, sizeof(c)) != sizeof(c))
err("pipe write");
if (pthread_join(uffd_mon, NULL))
err("join() failed");
if (test_collapse) {
- if (madvise(area_dst_alias, nr_pages * page_size,
+ if (madvise(gopts->area_dst_alias, gopts->nr_pages * gopts->page_size,
MADV_COLLAPSE)) {
/* It's fine to fail for this one... */
uffd_test_skip("MADV_COLLAPSE failed");
return;
}
- uffd_test_ops->check_pmd_mapping(area_dst,
- nr_pages * page_size /
+ uffd_test_ops->check_pmd_mapping(gopts,
+ gopts->area_dst,
+ gopts->nr_pages * gopts->page_size /
read_pmd_pagesize());
/*
* This won't cause uffd-fault - it purely just makes sure there
* was no corruption.
*/
- check_memory_contents(area_dst_alias);
+ check_memory_contents(gopts, gopts->area_dst_alias);
}
- if (args.missing_faults != 0 || args.minor_faults != nr_pages)
+ if (args.missing_faults != 0 || args.minor_faults != gopts->nr_pages)
uffd_test_fail("stats check error");
else
uffd_test_pass();
}
-void uffd_minor_test(uffd_test_args_t *args)
+void uffd_minor_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_minor_test_common(false, false);
+ uffd_minor_test_common(gopts, false, false);
}
-void uffd_minor_wp_test(uffd_test_args_t *args)
+void uffd_minor_wp_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_minor_test_common(false, true);
+ uffd_minor_test_common(gopts, false, true);
}
-void uffd_minor_collapse_test(uffd_test_args_t *args)
+void uffd_minor_collapse_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_minor_test_common(true, false);
+ uffd_minor_test_common(gopts, true, false);
}
static sigjmp_buf jbuf, *sigbuf;
@@ -678,7 +655,7 @@ static void sighndl(int sig, siginfo_t *
* This also tests UFFD_FEATURE_EVENT_FORK event along with the signal
* feature. Using monitor thread, verify no userfault events are generated.
*/
-static int faulting_process(int signal_test, bool wp)
+static int faulting_process(uffd_global_test_opts_t *gopts, int signal_test, bool wp)
{
unsigned long nr, i;
unsigned long long count;
@@ -687,7 +664,7 @@ static int faulting_process(int signal_t
struct sigaction act;
volatile unsigned long signalled = 0;
- split_nr_pages = (nr_pages + 1) / 2;
+ split_nr_pages = (gopts->nr_pages + 1) / 2;
if (signal_test) {
sigbuf = &jbuf;
@@ -701,7 +678,7 @@ static int faulting_process(int signal_t
for (nr = 0; nr < split_nr_pages; nr++) {
volatile int steps = 1;
- unsigned long offset = nr * page_size;
+ unsigned long offset = nr * gopts->page_size;
if (signal_test) {
if (sigsetjmp(*sigbuf, 1) != 0) {
@@ -713,15 +690,15 @@ static int faulting_process(int signal_t
if (steps == 1) {
/* This is a MISSING request */
steps++;
- if (copy_page(uffd, offset, wp))
+ if (copy_page(gopts, offset, wp))
signalled++;
} else {
/* This is a WP request */
assert(steps == 2);
- wp_range(uffd,
- (__u64)area_dst +
+ wp_range(gopts->uffd,
+ (__u64)gopts->area_dst +
offset,
- page_size, false);
+ gopts->page_size, false);
}
} else {
signalled++;
@@ -730,51 +707,53 @@ static int faulting_process(int signal_t
}
}
- count = *area_count(area_dst, nr);
- if (count != count_verify[nr])
+ count = *area_count(gopts->area_dst, nr, gopts);
+ if (count != gopts->count_verify[nr])
err("nr %lu memory corruption %llu %llu\n",
- nr, count, count_verify[nr]);
+ nr, count, gopts->count_verify[nr]);
/*
* Trigger write protection if there is by writing
* the same value back.
*/
- *area_count(area_dst, nr) = count;
+ *area_count(gopts->area_dst, nr, gopts) = count;
}
if (signal_test)
return signalled != split_nr_pages;
- area_dst = mremap(area_dst, nr_pages * page_size, nr_pages * page_size,
- MREMAP_MAYMOVE | MREMAP_FIXED, area_src);
- if (area_dst == MAP_FAILED)
+ gopts->area_dst = mremap(gopts->area_dst, gopts->nr_pages * gopts->page_size,
+ gopts->nr_pages * gopts->page_size,
+ MREMAP_MAYMOVE | MREMAP_FIXED,
+ gopts->area_src);
+ if (gopts->area_dst == MAP_FAILED)
err("mremap");
/* Reset area_src since we just clobbered it */
- area_src = NULL;
+ gopts->area_src = NULL;
- for (; nr < nr_pages; nr++) {
- count = *area_count(area_dst, nr);
- if (count != count_verify[nr]) {
+ for (; nr < gopts->nr_pages; nr++) {
+ count = *area_count(gopts->area_dst, nr, gopts);
+ if (count != gopts->count_verify[nr]) {
err("nr %lu memory corruption %llu %llu\n",
- nr, count, count_verify[nr]);
+ nr, count, gopts->count_verify[nr]);
}
/*
* Trigger write protection if there is by writing
* the same value back.
*/
- *area_count(area_dst, nr) = count;
+ *area_count(gopts->area_dst, nr, gopts) = count;
}
- uffd_test_ops->release_pages(area_dst);
+ uffd_test_ops->release_pages(gopts, gopts->area_dst);
- for (nr = 0; nr < nr_pages; nr++)
- for (i = 0; i < page_size; i++)
- if (*(area_dst + nr * page_size + i) != 0)
+ for (nr = 0; nr < gopts->nr_pages; nr++)
+ for (i = 0; i < gopts->page_size; i++)
+ if (*(gopts->area_dst + nr * gopts->page_size + i) != 0)
err("page %lu offset %lu is not zero", nr, i);
return 0;
}
-static void uffd_sigbus_test_common(bool wp)
+static void uffd_sigbus_test_common(uffd_global_test_opts_t *gopts, bool wp)
{
unsigned long userfaults;
pthread_t uffd_mon;
@@ -782,25 +761,26 @@ static void uffd_sigbus_test_common(bool
int err;
char c;
struct uffd_args args = { 0 };
+ args.gopts = gopts;
- ready_for_fork = false;
+ gopts->ready_for_fork = false;
- fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);
+ fcntl(gopts->uffd, F_SETFL, gopts->uffd_flags | O_NONBLOCK);
- if (uffd_register(uffd, area_dst, nr_pages * page_size,
+ if (uffd_register(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size,
true, wp, false))
err("register failure");
- if (faulting_process(1, wp))
+ if (faulting_process(gopts, 1, wp))
err("faulting process failed");
- uffd_test_ops->release_pages(area_dst);
+ uffd_test_ops->release_pages(gopts, gopts->area_dst);
args.apply_wp = wp;
if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args))
err("uffd_poll_thread create");
- while (!ready_for_fork)
+ while (!gopts->ready_for_fork)
; /* Wait for the poll_thread to start executing before forking */
pid = fork();
@@ -808,12 +788,12 @@ static void uffd_sigbus_test_common(bool
err("fork");
if (!pid)
- exit(faulting_process(2, wp));
+ exit(faulting_process(gopts, 2, wp));
waitpid(pid, &err, 0);
if (err)
err("faulting process failed");
- if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))
+ if (write(gopts->pipefd[1], &c, sizeof(c)) != sizeof(c))
err("pipe write");
if (pthread_join(uffd_mon, (void **)&userfaults))
err("pthread_join()");
@@ -824,28 +804,29 @@ static void uffd_sigbus_test_common(bool
uffd_test_pass();
}
-static void uffd_sigbus_test(uffd_test_args_t *args)
+static void uffd_sigbus_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_sigbus_test_common(false);
+ uffd_sigbus_test_common(gopts, false);
}
-static void uffd_sigbus_wp_test(uffd_test_args_t *args)
+static void uffd_sigbus_wp_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_sigbus_test_common(true);
+ uffd_sigbus_test_common(gopts, true);
}
-static void uffd_events_test_common(bool wp)
+static void uffd_events_test_common(uffd_global_test_opts_t *gopts, bool wp)
{
pthread_t uffd_mon;
pid_t pid;
int err;
char c;
struct uffd_args args = { 0 };
+ args.gopts = gopts;
- ready_for_fork = false;
+ gopts->ready_for_fork = false;
- fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);
- if (uffd_register(uffd, area_dst, nr_pages * page_size,
+ fcntl(gopts->uffd, F_SETFL, gopts->uffd_flags | O_NONBLOCK);
+ if (uffd_register(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size,
true, wp, false))
err("register failure");
@@ -853,7 +834,7 @@ static void uffd_events_test_common(bool
if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args))
err("uffd_poll_thread create");
- while (!ready_for_fork)
+ while (!gopts->ready_for_fork)
; /* Wait for the poll_thread to start executing before forking */
pid = fork();
@@ -861,39 +842,39 @@ static void uffd_events_test_common(bool
err("fork");
if (!pid)
- exit(faulting_process(0, wp));
+ exit(faulting_process(gopts, 0, wp));
waitpid(pid, &err, 0);
if (err)
err("faulting process failed");
- if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))
+ if (write(gopts->pipefd[1], &c, sizeof(c)) != sizeof(c))
err("pipe write");
if (pthread_join(uffd_mon, NULL))
err("pthread_join()");
- if (args.missing_faults != nr_pages)
+ if (args.missing_faults != gopts->nr_pages)
uffd_test_fail("Fault counts wrong");
else
uffd_test_pass();
}
-static void uffd_events_test(uffd_test_args_t *args)
+static void uffd_events_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_events_test_common(false);
+ uffd_events_test_common(gopts, false);
}
-static void uffd_events_wp_test(uffd_test_args_t *args)
+static void uffd_events_wp_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
- uffd_events_test_common(true);
+ uffd_events_test_common(gopts, true);
}
-static void retry_uffdio_zeropage(int ufd,
+static void retry_uffdio_zeropage(uffd_global_test_opts_t *gopts,
struct uffdio_zeropage *uffdio_zeropage)
{
- uffd_test_ops->alias_mapping(&uffdio_zeropage->range.start,
+ uffd_test_ops->alias_mapping(gopts, &uffdio_zeropage->range.start,
uffdio_zeropage->range.len,
0);
- if (ioctl(ufd, UFFDIO_ZEROPAGE, uffdio_zeropage)) {
+ if (ioctl(gopts->uffd, UFFDIO_ZEROPAGE, uffdio_zeropage)) {
if (uffdio_zeropage->zeropage != -EEXIST)
err("UFFDIO_ZEROPAGE error: %"PRId64,
(int64_t)uffdio_zeropage->zeropage);
@@ -903,16 +884,16 @@ static void retry_uffdio_zeropage(int uf
}
}
-static bool do_uffdio_zeropage(int ufd, bool has_zeropage)
+static bool do_uffdio_zeropage(uffd_global_test_opts_t *gopts, bool has_zeropage)
{
struct uffdio_zeropage uffdio_zeropage = { 0 };
int ret;
__s64 res;
- uffdio_zeropage.range.start = (unsigned long) area_dst;
- uffdio_zeropage.range.len = page_size;
+ uffdio_zeropage.range.start = (unsigned long) gopts->area_dst;
+ uffdio_zeropage.range.len = gopts->page_size;
uffdio_zeropage.mode = 0;
- ret = ioctl(ufd, UFFDIO_ZEROPAGE, &uffdio_zeropage);
+ ret = ioctl(gopts->uffd, UFFDIO_ZEROPAGE, &uffdio_zeropage);
res = uffdio_zeropage.zeropage;
if (ret) {
/* real retval in ufdio_zeropage.zeropage */
@@ -921,10 +902,10 @@ static bool do_uffdio_zeropage(int ufd,
else if (res != -EINVAL)
err("UFFDIO_ZEROPAGE not -EINVAL");
} else if (has_zeropage) {
- if (res != page_size)
+ if (res != gopts->page_size)
err("UFFDIO_ZEROPAGE unexpected size");
else
- retry_uffdio_zeropage(ufd, &uffdio_zeropage);
+ retry_uffdio_zeropage(gopts, &uffdio_zeropage);
return true;
} else
err("UFFDIO_ZEROPAGE succeeded");
@@ -950,25 +931,29 @@ uffd_register_detect_zeropage(int uffd,
}
/* exercise UFFDIO_ZEROPAGE */
-static void uffd_zeropage_test(uffd_test_args_t *args)
+static void uffd_zeropage_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
bool has_zeropage;
int i;
- has_zeropage = uffd_register_detect_zeropage(uffd, area_dst, page_size);
- if (area_dst_alias)
+ has_zeropage = uffd_register_detect_zeropage(gopts->uffd,
+ gopts->area_dst,
+ gopts->page_size);
+ if (gopts->area_dst_alias)
/* Ignore the retval; we already have it */
- uffd_register_detect_zeropage(uffd, area_dst_alias, page_size);
+ uffd_register_detect_zeropage(gopts->uffd, gopts->area_dst_alias, gopts->page_size);
- if (do_uffdio_zeropage(uffd, has_zeropage))
- for (i = 0; i < page_size; i++)
- if (area_dst[i] != 0)
+ if (do_uffdio_zeropage(gopts, has_zeropage))
+ for (i = 0; i < gopts->page_size; i++)
+ if (gopts->area_dst[i] != 0)
err("data non-zero at offset %d\n", i);
- if (uffd_unregister(uffd, area_dst, page_size))
+ if (uffd_unregister(gopts->uffd, gopts->area_dst, gopts->page_size))
err("unregister");
- if (area_dst_alias && uffd_unregister(uffd, area_dst_alias, page_size))
+ if (gopts->area_dst_alias && uffd_unregister(gopts->uffd,
+ gopts->area_dst_alias,
+ gopts->page_size))
err("unregister");
uffd_test_pass();
@@ -987,26 +972,27 @@ static void uffd_register_poison(int uff
err("registered area doesn't support COPY and POISON ioctls");
}
-static void do_uffdio_poison(int uffd, unsigned long offset)
+static void do_uffdio_poison(uffd_global_test_opts_t *gopts, unsigned long offset)
{
struct uffdio_poison uffdio_poison = { 0 };
int ret;
__s64 res;
- uffdio_poison.range.start = (unsigned long) area_dst + offset;
- uffdio_poison.range.len = page_size;
+ uffdio_poison.range.start = (unsigned long) gopts->area_dst + offset;
+ uffdio_poison.range.len = gopts->page_size;
uffdio_poison.mode = 0;
- ret = ioctl(uffd, UFFDIO_POISON, &uffdio_poison);
+ ret = ioctl(gopts->uffd, UFFDIO_POISON, &uffdio_poison);
res = uffdio_poison.updated;
if (ret)
err("UFFDIO_POISON error: %"PRId64, (int64_t)res);
- else if (res != page_size)
+ else if (res != gopts->page_size)
err("UFFDIO_POISON unexpected size: %"PRId64, (int64_t)res);
}
-static void uffd_poison_handle_fault(
- struct uffd_msg *msg, struct uffd_args *args)
+static void uffd_poison_handle_fault(uffd_global_test_opts_t *gopts,
+ struct uffd_msg *msg,
+ struct uffd_args *args)
{
unsigned long offset;
@@ -1017,20 +1003,20 @@ static void uffd_poison_handle_fault(
(UFFD_PAGEFAULT_FLAG_WP | UFFD_PAGEFAULT_FLAG_MINOR))
err("unexpected fault type %llu", msg->arg.pagefault.flags);
- offset = (char *)(unsigned long)msg->arg.pagefault.address - area_dst;
- offset &= ~(page_size-1);
+ offset = (char *)(unsigned long)msg->arg.pagefault.address - gopts->area_dst;
+ offset &= ~(gopts->page_size-1);
/* Odd pages -> copy zeroed page; even pages -> poison. */
- if (offset & page_size)
- copy_page(uffd, offset, false);
+ if (offset & gopts->page_size)
+ copy_page(gopts, offset, false);
else
- do_uffdio_poison(uffd, offset);
+ do_uffdio_poison(gopts, offset);
}
/* Make sure to cover odd/even, and minimum duplications */
#define UFFD_POISON_TEST_NPAGES 4
-static void uffd_poison_test(uffd_test_args_t *targs)
+static void uffd_poison_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *targs)
{
pthread_t uffd_mon;
char c;
@@ -1039,15 +1025,17 @@ static void uffd_poison_test(uffd_test_a
unsigned long nr_sigbus = 0;
unsigned long nr, poison_pages = UFFD_POISON_TEST_NPAGES;
- if (nr_pages < poison_pages) {
- uffd_test_skip("Too few pages for POISON test");
+ if (gopts->nr_pages < poison_pages) {
+ uffd_test_skip("Too less pages for POISON test");
return;
}
- fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);
+ args.gopts = gopts;
+
+ fcntl(gopts->uffd, F_SETFL, gopts->uffd_flags | O_NONBLOCK);
- uffd_register_poison(uffd, area_dst, poison_pages * page_size);
- memset(area_src, 0, poison_pages * page_size);
+ uffd_register_poison(gopts->uffd, gopts->area_dst, poison_pages * gopts->page_size);
+ memset(gopts->area_src, 0, poison_pages * gopts->page_size);
args.handle_fault = uffd_poison_handle_fault;
if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args))
@@ -1060,8 +1048,8 @@ static void uffd_poison_test(uffd_test_a
err("sigaction");
for (nr = 0; nr < poison_pages; ++nr) {
- unsigned long offset = nr * page_size;
- const char *bytes = (const char *) area_dst + offset;
+ unsigned long offset = nr * gopts->page_size;
+ const char *bytes = (const char *) gopts->area_dst + offset;
const char *i;
if (sigsetjmp(*sigbuf, 1)) {
@@ -1074,14 +1062,14 @@ static void uffd_poison_test(uffd_test_a
continue;
}
- for (i = bytes; i < bytes + page_size; ++i) {
+ for (i = bytes; i < bytes + gopts->page_size; ++i) {
if (*i)
err("nonzero byte in area_dst (%p) at %p: %u",
- area_dst, i, *i);
+ gopts->area_dst, i, *i);
}
}
- if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))
+ if (write(gopts->pipefd[1], &c, sizeof(c)) != sizeof(c))
err("pipe write");
if (pthread_join(uffd_mon, NULL))
err("pthread_join()");
@@ -1094,7 +1082,9 @@ static void uffd_poison_test(uffd_test_a
}
static void
-uffd_move_handle_fault_common(struct uffd_msg *msg, struct uffd_args *args,
+uffd_move_handle_fault_common(uffd_global_test_opts_t *gopts,
+ struct uffd_msg *msg,
+ struct uffd_args *args,
unsigned long len)
{
unsigned long offset;
@@ -1106,28 +1096,32 @@ uffd_move_handle_fault_common(struct uff
(UFFD_PAGEFAULT_FLAG_WP | UFFD_PAGEFAULT_FLAG_MINOR | UFFD_PAGEFAULT_FLAG_WRITE))
err("unexpected fault type %llu", msg->arg.pagefault.flags);
- offset = (char *)(unsigned long)msg->arg.pagefault.address - area_dst;
+ offset = (char *)(unsigned long)msg->arg.pagefault.address - gopts->area_dst;
offset &= ~(len-1);
- if (move_page(uffd, offset, len))
+ if (move_page(gopts, offset, len))
args->missing_faults++;
}
-static void uffd_move_handle_fault(struct uffd_msg *msg,
+static void uffd_move_handle_fault(uffd_global_test_opts_t *gopts, struct uffd_msg *msg,
struct uffd_args *args)
{
- uffd_move_handle_fault_common(msg, args, page_size);
+ uffd_move_handle_fault_common(gopts, msg, args, gopts->page_size);
}
-static void uffd_move_pmd_handle_fault(struct uffd_msg *msg,
+static void uffd_move_pmd_handle_fault(uffd_global_test_opts_t *gopts, struct uffd_msg *msg,
struct uffd_args *args)
{
- uffd_move_handle_fault_common(msg, args, read_pmd_pagesize());
+ uffd_move_handle_fault_common(gopts, msg, args, read_pmd_pagesize());
}
static void
-uffd_move_test_common(uffd_test_args_t *targs, unsigned long chunk_size,
- void (*handle_fault)(struct uffd_msg *msg, struct uffd_args *args))
+uffd_move_test_common(uffd_global_test_opts_t *gopts,
+ uffd_test_args_t *targs,
+ unsigned long chunk_size,
+ void (*handle_fault)(struct uffd_global_test_opts *gopts,
+ struct uffd_msg *msg, struct uffd_args *args)
+)
{
unsigned long nr;
pthread_t uffd_mon;
@@ -1139,11 +1133,13 @@ uffd_move_test_common(uffd_test_args_t *
unsigned long src_offs = 0;
unsigned long dst_offs = 0;
+ args.gopts = gopts;
+
/* Prevent source pages from being mapped more than once */
- if (madvise(area_src, nr_pages * page_size, MADV_DONTFORK))
+ if (madvise(gopts->area_src, gopts->nr_pages * gopts->page_size, MADV_DONTFORK))
err("madvise(MADV_DONTFORK) failure");
- if (uffd_register(uffd, area_dst, nr_pages * page_size,
+ if (uffd_register(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size,
true, false, false))
err("register failure");
@@ -1151,22 +1147,22 @@ uffd_move_test_common(uffd_test_args_t *
if (pthread_create(&uffd_mon, NULL, uffd_poll_thread, &args))
err("uffd_poll_thread create");
- step_size = chunk_size / page_size;
- step_count = nr_pages / step_size;
+ step_size = chunk_size / gopts->page_size;
+ step_count = gopts->nr_pages / step_size;
- if (chunk_size > page_size) {
- char *aligned_src = ALIGN_UP(area_src, chunk_size);
- char *aligned_dst = ALIGN_UP(area_dst, chunk_size);
-
- if (aligned_src != area_src || aligned_dst != area_dst) {
- src_offs = (aligned_src - area_src) / page_size;
- dst_offs = (aligned_dst - area_dst) / page_size;
+ if (chunk_size > gopts->page_size) {
+ char *aligned_src = ALIGN_UP(gopts->area_src, chunk_size);
+ char *aligned_dst = ALIGN_UP(gopts->area_dst, chunk_size);
+
+ if (aligned_src != gopts->area_src || aligned_dst != gopts->area_dst) {
+ src_offs = (aligned_src - gopts->area_src) / gopts->page_size;
+ dst_offs = (aligned_dst - gopts->area_dst) / gopts->page_size;
step_count--;
}
- orig_area_src = area_src;
- orig_area_dst = area_dst;
- area_src = aligned_src;
- area_dst = aligned_dst;
+ orig_area_src = gopts->area_src;
+ orig_area_dst = gopts->area_dst;
+ gopts->area_src = aligned_src;
+ gopts->area_dst = aligned_dst;
}
/*
@@ -1180,34 +1176,34 @@ uffd_move_test_common(uffd_test_args_t *
/* Check area_src content */
for (i = 0; i < step_size; i++) {
- count = *area_count(area_src, nr + i);
- if (count != count_verify[src_offs + nr + i])
+ count = *area_count(gopts->area_src, nr + i, gopts);
+ if (count != gopts->count_verify[src_offs + nr + i])
err("nr %lu source memory invalid %llu %llu\n",
- nr + i, count, count_verify[src_offs + nr + i]);
+ nr + i, count, gopts->count_verify[src_offs + nr + i]);
}
/* Faulting into area_dst should move the page or the huge page */
for (i = 0; i < step_size; i++) {
- count = *area_count(area_dst, nr + i);
- if (count != count_verify[dst_offs + nr + i])
+ count = *area_count(gopts->area_dst, nr + i, gopts);
+ if (count != gopts->count_verify[dst_offs + nr + i])
err("nr %lu memory corruption %llu %llu\n",
- nr, count, count_verify[dst_offs + nr + i]);
+ nr, count, gopts->count_verify[dst_offs + nr + i]);
}
/* Re-check area_src content which should be empty */
for (i = 0; i < step_size; i++) {
- count = *area_count(area_src, nr + i);
+ count = *area_count(gopts->area_src, nr + i, gopts);
if (count != 0)
err("nr %lu move failed %llu %llu\n",
- nr, count, count_verify[src_offs + nr + i]);
+ nr, count, gopts->count_verify[src_offs + nr + i]);
}
}
- if (chunk_size > page_size) {
- area_src = orig_area_src;
- area_dst = orig_area_dst;
+ if (chunk_size > gopts->page_size) {
+ gopts->area_src = orig_area_src;
+ gopts->area_dst = orig_area_dst;
}
- if (write(pipefd[1], &c, sizeof(c)) != sizeof(c))
+ if (write(gopts->pipefd[1], &c, sizeof(c)) != sizeof(c))
err("pipe write");
if (pthread_join(uffd_mon, NULL))
err("join() failed");
@@ -1218,24 +1214,24 @@ uffd_move_test_common(uffd_test_args_t *
uffd_test_pass();
}
-static void uffd_move_test(uffd_test_args_t *targs)
+static void uffd_move_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *targs)
{
- uffd_move_test_common(targs, page_size, uffd_move_handle_fault);
+ uffd_move_test_common(gopts, targs, gopts->page_size, uffd_move_handle_fault);
}
-static void uffd_move_pmd_test(uffd_test_args_t *targs)
+static void uffd_move_pmd_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *targs)
{
- if (madvise(area_dst, nr_pages * page_size, MADV_HUGEPAGE))
+ if (madvise(gopts->area_dst, gopts->nr_pages * gopts->page_size, MADV_HUGEPAGE))
err("madvise(MADV_HUGEPAGE) failure");
- uffd_move_test_common(targs, read_pmd_pagesize(),
+ uffd_move_test_common(gopts, targs, read_pmd_pagesize(),
uffd_move_pmd_handle_fault);
}
-static void uffd_move_pmd_split_test(uffd_test_args_t *targs)
+static void uffd_move_pmd_split_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *targs)
{
- if (madvise(area_dst, nr_pages * page_size, MADV_NOHUGEPAGE))
+ if (madvise(gopts->area_dst, gopts->nr_pages * gopts->page_size, MADV_NOHUGEPAGE))
err("madvise(MADV_NOHUGEPAGE) failure");
- uffd_move_test_common(targs, read_pmd_pagesize(),
+ uffd_move_test_common(gopts, targs, read_pmd_pagesize(),
uffd_move_pmd_handle_fault);
}
@@ -1295,6 +1291,11 @@ typedef enum {
THR_STATE_UNINTERRUPTIBLE,
} thread_state;
+typedef struct {
+ uffd_global_test_opts_t *gopts;
+ volatile pid_t *pid;
+} mmap_changing_thread_args;
+
static void sleep_short(void)
{
usleep(1000);
@@ -1337,7 +1338,9 @@ static void thread_state_until(pid_t tid
static void *uffd_mmap_changing_thread(void *opaque)
{
- volatile pid_t *pid = opaque;
+ mmap_changing_thread_args *args = opaque;
+ uffd_global_test_opts_t *gopts = args->gopts;
+ volatile pid_t *pid = args->pid;
int ret;
/* Unfortunately, it's only fetch-able from the thread itself.. */
@@ -1345,21 +1348,21 @@ static void *uffd_mmap_changing_thread(v
*pid = syscall(SYS_gettid);
/* Inject an event, this will hang solid until the event read */
- ret = madvise(area_dst, page_size, MADV_REMOVE);
+ ret = madvise(gopts->area_dst, gopts->page_size, MADV_REMOVE);
if (ret)
err("madvise(MADV_REMOVE) failed");
return NULL;
}
-static void uffd_consume_message(int fd)
+static void uffd_consume_message(uffd_global_test_opts_t *gopts)
{
struct uffd_msg msg = { 0 };
- while (uffd_read_msg(fd, &msg));
+ while (uffd_read_msg(gopts, &msg));
}
-static void uffd_mmap_changing_test(uffd_test_args_t *targs)
+static void uffd_mmap_changing_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *targs)
{
/*
* This stores the real PID (which can be different from how tid is
@@ -1368,13 +1371,14 @@ static void uffd_mmap_changing_test(uffd
pid_t pid = 0;
pthread_t tid;
int ret;
+ mmap_changing_thread_args args = { gopts, &pid };
- if (uffd_register(uffd, area_dst, nr_pages * page_size,
+ if (uffd_register(gopts->uffd, gopts->area_dst, gopts->nr_pages * gopts->page_size,
true, false, false))
err("uffd_register() failed");
/* Create a thread to generate the racy event */
- ret = pthread_create(&tid, NULL, uffd_mmap_changing_thread, &pid);
+ ret = pthread_create(&tid, NULL, uffd_mmap_changing_thread, &args);
if (ret)
err("pthread_create() failed");
@@ -1388,26 +1392,26 @@ static void uffd_mmap_changing_test(uffd
/* Wait until the thread hangs at REMOVE event */
thread_state_until(pid, THR_STATE_UNINTERRUPTIBLE);
- if (!uffdio_mmap_changing_test_copy(uffd))
+ if (!uffdio_mmap_changing_test_copy(gopts->uffd))
return;
- if (!uffdio_mmap_changing_test_zeropage(uffd))
+ if (!uffdio_mmap_changing_test_zeropage(gopts->uffd))
return;
- if (!uffdio_mmap_changing_test_move(uffd))
+ if (!uffdio_mmap_changing_test_move(gopts->uffd))
return;
- if (!uffdio_mmap_changing_test_poison(uffd))
+ if (!uffdio_mmap_changing_test_poison(gopts->uffd))
return;
- if (!uffdio_mmap_changing_test_continue(uffd))
+ if (!uffdio_mmap_changing_test_continue(gopts->uffd))
return;
/*
* All succeeded above! Recycle everything. Start by reading the
* event so as to kick the thread roll again..
*/
- uffd_consume_message(uffd);
+ uffd_consume_message(gopts);
ret = pthread_join(tid, NULL);
assert(ret == 0);
@@ -1415,10 +1419,10 @@ static void uffd_mmap_changing_test(uffd
uffd_test_pass();
}
-static int prevent_hugepages(const char **errmsg)
+static int prevent_hugepages(uffd_global_test_opts_t *gopts, const char **errmsg)
{
/* This should be done before source area is populated */
- if (madvise(area_src, nr_pages * page_size, MADV_NOHUGEPAGE)) {
+ if (madvise(gopts->area_src, gopts->nr_pages * gopts->page_size, MADV_NOHUGEPAGE)) {
/* Ignore only if CONFIG_TRANSPARENT_HUGEPAGE=n */
if (errno != EINVAL) {
if (errmsg)
@@ -1429,10 +1433,10 @@ static int prevent_hugepages(const char
return 0;
}
-static int request_hugepages(const char **errmsg)
+static int request_hugepages(uffd_global_test_opts_t *gopts, const char **errmsg)
{
/* This should be done before source area is populated */
- if (madvise(area_src, nr_pages * page_size, MADV_HUGEPAGE)) {
+ if (madvise(gopts->area_src, gopts->nr_pages * gopts->page_size, MADV_HUGEPAGE)) {
if (errmsg) {
*errmsg = (errno == EINVAL) ?
"CONFIG_TRANSPARENT_HUGEPAGE is not set" :
@@ -1456,13 +1460,17 @@ struct uffd_test_case_ops uffd_move_test
* Note that _UFFDIO_ZEROPAGE is tested separately in the zeropage test.
*/
static void
-do_register_ioctls_test(uffd_test_args_t *args, bool miss, bool wp, bool minor)
+do_register_ioctls_test(uffd_global_test_opts_t *gopts,
+ uffd_test_args_t *args,
+ bool miss,
+ bool wp,
+ bool minor)
{
uint64_t ioctls = 0, expected = BIT_ULL(_UFFDIO_WAKE);
mem_type_t *mem_type = args->mem_type;
int ret;
- ret = uffd_register_with_ioctls(uffd, area_dst, page_size,
+ ret = uffd_register_with_ioctls(gopts->uffd, gopts->area_dst, gopts->page_size,
miss, wp, minor, &ioctls);
/*
@@ -1493,18 +1501,18 @@ do_register_ioctls_test(uffd_test_args_t
"(miss=%d, wp=%d, minor=%d): expected=0x%"PRIx64", "
"returned=0x%"PRIx64, miss, wp, minor, expected, ioctls);
- if (uffd_unregister(uffd, area_dst, page_size))
+ if (uffd_unregister(gopts->uffd, gopts->area_dst, gopts->page_size))
err("unregister");
}
-static void uffd_register_ioctls_test(uffd_test_args_t *args)
+static void uffd_register_ioctls_test(uffd_global_test_opts_t *gopts, uffd_test_args_t *args)
{
int miss, wp, minor;
for (miss = 0; miss <= 1; miss++)
for (wp = 0; wp <= 1; wp++)
for (minor = 0; minor <= 1; minor++)
- do_register_ioctls_test(args, miss, wp, minor);
+ do_register_ioctls_test(gopts, args, miss, wp, minor);
uffd_test_pass();
}
@@ -1742,6 +1750,28 @@ int main(int argc, char *argv[])
}
for (j = 0; j < n_mems; j++) {
mem_type = &mem_types[j];
+
+ /* Initialize global test options */
+ uffd_global_test_opts_t gopts = { 0 };
+
+ gopts.map_shared = mem_type->shared;
+ uffd_test_ops = mem_type->mem_ops;
+ uffd_test_case_ops = test->test_case_ops;
+
+ if (mem_type->mem_flag & (MEM_HUGETLB_PRIVATE | MEM_HUGETLB))
+ gopts.page_size = default_huge_page_size();
+ else
+ gopts.page_size = psize();
+
+ /* Ensure we have at least 2 pages */
+ gopts.nr_pages = MAX(UFFD_TEST_MEM_SIZE, gopts.page_size * 2)
+ / gopts.page_size;
+
+ gopts.nr_parallel = 1;
+
+ /* Initialize test arguments */
+ args.mem_type = mem_type;
+
if (!(test->mem_targets & mem_type->mem_flag))
continue;
@@ -1756,13 +1786,12 @@ int main(int argc, char *argv[])
uffd_test_skip("feature missing");
continue;
}
- if (uffd_setup_environment(&args, test, mem_type,
- &errmsg)) {
+ if (uffd_test_ctx_init(&gopts, test->uffd_feature_required, &errmsg)) {
uffd_test_skip(errmsg);
continue;
}
- test->uffd_fn(&args);
- uffd_test_ctx_clear();
+ test->uffd_fn(&gopts, &args);
+ uffd_test_ctx_clear(&gopts);
}
}
--- a/tools/testing/selftests/mm/uffd-wp-mremap.c~selftests-mm-uffd-refactor-non-composite-global-vars-into-struct
+++ a/tools/testing/selftests/mm/uffd-wp-mremap.c
@@ -152,7 +152,8 @@ static bool range_is_swapped(void *addr,
return true;
}
-static void test_one_folio(size_t size, bool private, bool swapout, bool hugetlb)
+static void test_one_folio(uffd_global_test_opts_t *gopts, size_t size, bool private,
+ bool swapout, bool hugetlb)
{
struct uffdio_writeprotect wp_prms;
uint64_t features = 0;
@@ -176,21 +177,21 @@ static void test_one_folio(size_t size,
}
/* Register range for uffd-wp. */
- if (userfaultfd_open(&features)) {
+ if (userfaultfd_open(gopts, &features)) {
if (errno == ENOENT)
ksft_test_result_skip("userfaultfd not available\n");
else
ksft_test_result_fail("userfaultfd_open() failed\n");
goto out;
}
- if (uffd_register(uffd, mem, size, false, true, false)) {
+ if (uffd_register(gopts->uffd, mem, size, false, true, false)) {
ksft_test_result_fail("uffd_register() failed\n");
goto out;
}
wp_prms.mode = UFFDIO_WRITEPROTECT_MODE_WP;
wp_prms.range.start = (uintptr_t)mem;
wp_prms.range.len = size;
- if (ioctl(uffd, UFFDIO_WRITEPROTECT, &wp_prms)) {
+ if (ioctl(gopts->uffd, UFFDIO_WRITEPROTECT, &wp_prms)) {
ksft_test_result_fail("ioctl(UFFDIO_WRITEPROTECT) failed\n");
goto out;
}
@@ -237,9 +238,9 @@ static void test_one_folio(size_t size,
out:
if (mem)
munmap(mem, size);
- if (uffd >= 0) {
- close(uffd);
- uffd = -1;
+ if (gopts->uffd >= 0) {
+ close(gopts->uffd);
+ gopts->uffd = -1;
}
}
@@ -331,6 +332,7 @@ static const struct testcase testcases[]
int main(int argc, char **argv)
{
+ uffd_global_test_opts_t gopts = { 0 };
struct thp_settings settings;
int i, j, plan = 0;
@@ -362,8 +364,8 @@ int main(int argc, char **argv)
const struct testcase *tc = &testcases[i];
for (j = 0; j < *tc->nr_sizes; j++)
- test_one_folio(tc->sizes[j], tc->private, tc->swapout,
- tc->hugetlb);
+ test_one_folio(&gopts, tc->sizes[j], tc->private,
+ tc->swapout, tc->hugetlb);
}
/* If THP is supported, restore original THP settings. */
_