Add kselftest support for open, linkat, unshare, mount tests
- Replace direct error handling with `ksft_test_result_*` macros for better reporting of test outcomes.
- Add `ksft_print_header()` and `ksft_set_plan()` to structure test outputs more effectively.
- Introduce the helper function `is_unshare()` to handle unshare() related checks.
- Improve the test flow by adding more detailed pass/fail reporting for unshare, mounting, file opening, and linking operations.
- Skip the test if it's not run as root, providing an appropriate Warning.
Test logs:
Before change:
- Without 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 run
- 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 --- Changes in v2: - Make the commit message more clear.
.../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 failure } fprintf(stderr, "error: unshare, errno %d\n", errno); + return -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"); return 1; } - 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"); return 1; }
+ 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); return 1; + } 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); return 1; + } 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 return 1; + } else { + ksft_test_result_pass("linkat(): Linking the temporary file: Success\n"); } close(fd);
- 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); return 1; + } else { + ksft_test_result_pass("openat(): Opening the second temporary file: Success\n"); }
+ ksft_exit_pass(); return 0; }