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mm/selftests: hugepage-mremap: conform test to TAP format output

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Conform the layout, informational and status messages to TAP.  No
functional change is intended other than the layout of output messages.

Link: https://lkml.kernel.org/r/20240102081919.2325570-1-usama.anjum@collabora.com
Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Muhammad Usama Anjum
2024-01-02 13:19:18 +05:00
committed by Andrew Morton
parent b805ab3c69
commit e2cfedf4b0
1 changed files with 35 additions and 52 deletions
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87
tools/testing/selftests/mm/hugepage-mremap.c
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@@ -24,6 +24,7 @@
#include <sys/ioctl.h>
#include <string.h>
#include <stdbool.h>
#include "../kselftest.h"
#include "vm_util.h"
#define DEFAULT_LENGTH_MB 10UL
@@ -34,7 +35,7 @@
static void check_bytes(char *addr)
{
printf("First hex is %x\n", *((unsigned int *)addr));
ksft_print_msg("First hex is %x\n", *((unsigned int *)addr));
}
static void write_bytes(char *addr, size_t len)
@@ -52,7 +53,7 @@ static int read_bytes(char *addr, size_t len)
check_bytes(addr);
for (i = 0; i < len; i++)
if (*(addr + i) != (char)i) {
printf("Mismatch at %lu\n", i);
ksft_print_msg("Mismatch at %lu\n", i);
return 1;
}
return 0;
@@ -66,17 +67,13 @@ static void register_region_with_uffd(char *addr, size_t len)
/* Create and enable userfaultfd object. */
uffd = syscall(__NR_userfaultfd, O_CLOEXEC | O_NONBLOCK);
if (uffd == -1) {
perror("userfaultfd");
exit(1);
}
if (uffd == -1)
ksft_exit_fail_msg("userfaultfd: %s\n", strerror(errno));
uffdio_api.api = UFFD_API;
uffdio_api.features = 0;
if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1) {
perror("ioctl-UFFDIO_API");
exit(1);
}
if (ioctl(uffd, UFFDIO_API, &uffdio_api) == -1)
ksft_exit_fail_msg("ioctl-UFFDIO_API: %s\n", strerror(errno));
/* Create a private anonymous mapping. The memory will be
* demand-zero paged--that is, not yet allocated. When we
@@ -86,21 +83,17 @@ static void register_region_with_uffd(char *addr, size_t len)
addr = mmap(NULL, len, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
if (addr == MAP_FAILED) {
perror("mmap");
exit(1);
}
if (addr == MAP_FAILED)
ksft_exit_fail_msg("mmap: %s\n", strerror(errno));
printf("Address returned by mmap() = %p\n", addr);
ksft_print_msg("Address returned by mmap() = %p\n", addr);
/* Register the memory range of the mapping we just created for
* handling by the userfaultfd object. In mode, we request to track
* missing pages (i.e., pages that have not yet been faulted in).
*/
if (uffd_register(uffd, addr, len, true, false, false)) {
perror("ioctl-UFFDIO_REGISTER");
exit(1);
}
if (uffd_register(uffd, addr, len, true, false, false))
ksft_exit_fail_msg("ioctl-UFFDIO_REGISTER: %s\n", strerror(errno));
}
int main(int argc, char *argv[])
@@ -108,10 +101,11 @@ int main(int argc, char *argv[])
size_t length = 0;
int ret = 0, fd;
if (argc >= 2 && !strcmp(argv[1], "-h")) {
printf("Usage: %s [length_in_MB]\n", argv[0]);
exit(1);
}
ksft_print_header();
ksft_set_plan(1);
if (argc >= 2 && !strcmp(argv[1], "-h"))
ksft_exit_fail_msg("Usage: %s [length_in_MB]\n", argv[0]);
/* Read memory length as the first arg if valid, otherwise fallback to
* the default length.
@@ -123,50 +117,40 @@ int main(int argc, char *argv[])
length = MB_TO_BYTES(length);
fd = memfd_create(argv[0], MFD_HUGETLB);
if (fd < 0) {
perror("Open failed");
exit(1);
}
if (fd < 0)
ksft_exit_fail_msg("Open failed: %s\n", strerror(errno));
/* mmap to a PUD aligned address to hopefully trigger pmd sharing. */
unsigned long suggested_addr = 0x7eaa40000000;
void *haddr = mmap((void *)suggested_addr, length, PROTECTION,
MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);
printf("Map haddr: Returned address is %p\n", haddr);
if (haddr == MAP_FAILED) {
perror("mmap1");
exit(1);
}
ksft_print_msg("Map haddr: Returned address is %p\n", haddr);
if (haddr == MAP_FAILED)
ksft_exit_fail_msg("mmap1: %s\n", strerror(errno));
/* mmap again to a dummy address to hopefully trigger pmd sharing. */
suggested_addr = 0x7daa40000000;
void *daddr = mmap((void *)suggested_addr, length, PROTECTION,
MAP_HUGETLB | MAP_SHARED | MAP_POPULATE, fd, 0);
printf("Map daddr: Returned address is %p\n", daddr);
if (daddr == MAP_FAILED) {
perror("mmap3");
exit(1);
}
ksft_print_msg("Map daddr: Returned address is %p\n", daddr);
if (daddr == MAP_FAILED)
ksft_exit_fail_msg("mmap3: %s\n", strerror(errno));
suggested_addr = 0x7faa40000000;
void *vaddr =
mmap((void *)suggested_addr, length, PROTECTION, FLAGS, -1, 0);
printf("Map vaddr: Returned address is %p\n", vaddr);
if (vaddr == MAP_FAILED) {
perror("mmap2");
exit(1);
}
ksft_print_msg("Map vaddr: Returned address is %p\n", vaddr);
if (vaddr == MAP_FAILED)
ksft_exit_fail_msg("mmap2: %s\n", strerror(errno));
register_region_with_uffd(haddr, length);
void *addr = mremap(haddr, length, length,
MREMAP_MAYMOVE | MREMAP_FIXED, vaddr);
if (addr == MAP_FAILED) {
perror("mremap");
exit(1);
}
if (addr == MAP_FAILED)
ksft_exit_fail_msg("mremap: %s\n", strerror(errno));
printf("Mremap: Returned address is %p\n", addr);
ksft_print_msg("Mremap: Returned address is %p\n", addr);
check_bytes(addr);
write_bytes(addr, length);
ret = read_bytes(addr, length);
@@ -174,12 +158,11 @@ int main(int argc, char *argv[])
munmap(addr, length);
addr = mremap(addr, length, length, 0);
if (addr != MAP_FAILED) {
printf("mremap: Expected failure, but call succeeded\n");
exit(1);
}
if (addr != MAP_FAILED)
ksft_exit_fail_msg("mremap: Expected failure, but call succeeded\n");
close(fd);
return ret;
ksft_test_result(!ret, "Read same data\n");
ksft_exit(!ret);
}