On 10/24/24 10:55, Shivam Chaudhary wrote:
This patch updates the existing test that checks for `open(O_TMPFILE)` and `linkat()` behaviors in mount namespaces to use the kselftest framework.
This includes the following changes:
- Replaced direct error handling with `ksft_test_result_*` macros for better reporting of test outcomes.
Replace
Added `ksft_print_header()` and `ksft_set_plan()` to structure test outputs more effectively.
Introduced the helper function `is_unshare()` to handle unshare-related checks.
Introduce
- Improved the test flow by adding more detailed pass/fail reporting for unshare, mounting, file opening, and linking operations.
Improve
- Skips the test if it's not run as root, providing an appropriate Warning.
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Test logs:
Before change:
Withou root error: unshare, errno 1
With root No, output
After change:
Without root TAP version 13 1..1 ok 1 # SKIP This test needs root to ru
With root TAP version 13 1..1 ok 1 unshare(): we have a new mount namespace. 1..2 ok 2 mount(): Root filesystem private mount: Success 1..3 ok 3 mount(): Mounting tmpfs on /tmp: Success 1..4 ok 4 openat(): Open first temporary file: Success 1..5 ok 5 linkat(): Linking the temporary file: Success 1..6 ok 6 openat(): Opening the second temporary file: Success # Totals: pass:6 fail:0 xfail:0 xpass:0 skip:0 error:0
Signed-off-by: Shivam Chaudhary cvam0000@gmail.com
.../selftests/tmpfs/bug-link-o-tmpfile.c | 72 +++++++++++++++---- 1 file changed, 58 insertions(+), 14 deletions(-)
diff --git a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c index b5c3ddb90942..26dea19c1614 100644 --- a/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c +++ b/tools/testing/selftests/tmpfs/bug-link-o-tmpfile.c @@ -23,45 +23,89 @@ #include <sys/mount.h> #include <unistd.h> -int main(void) -{
- int fd;
+#include "../kselftest.h"
- if (unshare(CLONE_NEWNS) == -1) {
+static int is_unshare(int flag) +{
- if (unshare(flag) == -1) { if (errno == ENOSYS || errno == EPERM) {
fprintf(stderr, "error: unshare, errno %d\n", errno);return 4;
ksft_test_result_fail("error: unshare, errno %d\n", errno);return -1; // Return -1 for failurereturn -1;- }
- return 0; // Return 0 for success
+}
+int main(void) +{
- int fd;
- // Setting up kselftest framework
- ksft_print_header();
- ksft_set_plan(1);
- // Check if test is run as root
- if (geteuid()) {
ksft_test_result_skip("This test needs root to run!\n");
- if (mount(NULL, "/", NULL, MS_PRIVATE|MS_REC, NULL) == -1) {
fprintf(stderr, "error: mount '/', errno %d\n", errno);
- if (is_unshare(CLONE_NEWNS) == 0) {
ksft_test_result_pass("unshare(): we have a new mount namespace.\n");- } else {
ksft_test_result_fail("unshare(): failed\n");
- ksft_set_plan(2);
- if (mount(NULL, "/", NULL, MS_PRIVATE | MS_REC, NULL) == -1) {
ksft_test_result_fail("mount(): Root filesystem private mount: Fail %d\n", errno);return 1;- } else {
ksft_test_result_pass("mount(): Root filesystem private mount: Success\n");- }
- ksft_set_plan(3); /* Our heroes: 1 root inode, 1 O_TMPFILE inode, 1 permanent inode. */ if (mount(NULL, "/tmp", "tmpfs", 0, "nr_inodes=3") == -1) {
fprintf(stderr, "error: mount tmpfs, errno %d\n", errno);
ksft_test_result_fail("mount(): Mounting tmpfs on /tmp: Fail %d\n", errno);- } else {
ksft_test_result_pass("mount(): Mounting tmpfs on /tmp: Success\n");
- fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600);
- ksft_set_plan(4);
- fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) {
fprintf(stderr, "error: open 1, errno %d\n", errno);
ksft_test_result_fail("openat(): Open first temporary file: Fail %d\n", errno);- } else {
ksft_test_result_pass("openat(): Open first temporary file: Success\n");- ksft_set_plan(5); if (linkat(fd, "", AT_FDCWD, "/tmp/1", AT_EMPTY_PATH) == -1) {
fprintf(stderr, "error: linkat, errno %d\n", errno);
ksft_test_result_fail("linkat(): Linking the temporary file: Fail %d\n", errno);close(fd); // Ensure fd is closed on failure- } else {
ksft_test_result_pass("linkat(): Linking the temporary file: Success\n");
- fd = openat(AT_FDCWD, "/tmp", O_WRONLY|O_TMPFILE, 0600);
- ksft_set_plan(6);
- fd = openat(AT_FDCWD, "/tmp", O_WRONLY | O_TMPFILE, 0600); if (fd == -1) {
fprintf(stderr, "error: open 2, errno %d\n", errno);
ksft_test_result_fail("openat(): Opening the second temporary file: Fail %d\n", errno);- } else {
ksft_test_result_pass("openat(): Opening the second temporary file: Success\n");
- ksft_exit_pass(); return 0; }