selftests/mm: map_fixed_noreplace: conform test to TAP format output

Patch series "conform tests to TAP format output", v2.


This patch (of 12):

Conform the layout, informational and status messages to TAP.  No
functional change is intended other than the layout of output messages. 
While at it, convert commenting style from // to /**/.

Link: https://lkml.kernel.org/r/20240202113119.2047740-1-usama.anjum@collabora.com
Link: https://lkml.kernel.org/r/20240202113119.2047740-2-usama.anjum@collabora.comSigned-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: Shuah Khan <shuah@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

tools/testing/selftests/mm/map_fixed_noreplace.c

@@ -12,6 +12,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include "../kselftest.h"
 
 static void dump_maps(void)
 {
@@ -28,15 +29,12 @@ static unsigned long find_base_addr(unsigned long size)
 
 	flags = MAP_PRIVATE | MAP_ANONYMOUS;
 	addr = mmap(NULL, size, PROT_NONE, flags, -1, 0);
-	if (addr == MAP_FAILED) {
-		printf("Error: couldn't map the space we need for the test\n");
-		return 0;
-	}
+	if (addr == MAP_FAILED)
+		ksft_exit_fail_msg("Error: couldn't map the space we need for the test\n");
+
+	if (munmap(addr, size) != 0)
+		ksft_exit_fail_msg("Error: munmap failed\n");
 
-	if (munmap(addr, size) != 0) {
-		printf("Error: couldn't map the space we need for the test\n");
-		return 0;
-	}
 	return (unsigned long)addr;
 }
 
@@ -46,51 +44,39 @@ int main(void)
 	unsigned long flags, addr, size, page_size;
 	char *p;
 
+	ksft_print_header();
+	ksft_set_plan(9);
+
 	page_size = sysconf(_SC_PAGE_SIZE);
 
-	//let's find a base addr that is free before we start the tests
+	/* let's find a base addr that is free before we start the tests */
 	size = 5 * page_size;
 	base_addr = find_base_addr(size);
-	if (!base_addr) {
-		printf("Error: couldn't map the space we need for the test\n");
-		return 1;
-	}
 
 	flags = MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED_NOREPLACE;
 
-	// Check we can map all the areas we need below
-	errno = 0;
+	/* Check we can map all the areas we need below */
 	addr = base_addr;
 	size = 5 * page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p == MAP_FAILED) {
 		dump_maps();
-		printf("Error: couldn't map the space we need for the test\n");
-		return 1;
+		ksft_exit_fail_msg("Error: couldn't map the space we need for the test\n");
 	}
-
-	errno = 0;
 	if (munmap((void *)addr, 5 * page_size) != 0) {
 		dump_maps();
-		printf("Error: munmap failed!?\n");
-		return 1;
+		ksft_exit_fail_msg("Error: munmap failed!?\n");
 	}
-	printf("unmap() successful\n");
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
-	errno = 0;
 	addr = base_addr + page_size;
 	size = 3 * page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p == MAP_FAILED) {
 		dump_maps();
-		printf("Error: first mmap() failed unexpectedly\n");
-		return 1;
+		ksft_exit_fail_msg("Error: first mmap() failed unexpectedly\n");
 	}
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
 	/*
 	 * Exact same mapping again:
@@ -100,17 +86,14 @@ int main(void)
 	 *     +3 | mapped | new
 	 *     +4 |  free  | new
 	 */
-	errno = 0;
 	addr = base_addr;
 	size = 5 * page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p != MAP_FAILED) {
 		dump_maps();
-		printf("Error:1: mmap() succeeded when it shouldn't have\n");
-		return 1;
+		ksft_exit_fail_msg("Error:1: mmap() succeeded when it shouldn't have\n");
 	}
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
 	/*
 	 * Second mapping contained within first:
@@ -121,17 +104,14 @@ int main(void)
 	 *     +3 | mapped |
 	 *     +4 |  free  |
 	 */
-	errno = 0;
 	addr = base_addr + (2 * page_size);
 	size = page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p != MAP_FAILED) {
 		dump_maps();
-		printf("Error:2: mmap() succeeded when it shouldn't have\n");
-		return 1;
+		ksft_exit_fail_msg("Error:2: mmap() succeeded when it shouldn't have\n");
 	}
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
 	/*
 	 * Overlap end of existing mapping:
@@ -141,17 +121,14 @@ int main(void)
 	 *     +3 | mapped | new
 	 *     +4 |  free  | new
 	 */
-	errno = 0;
 	addr = base_addr + (3 * page_size);
 	size = 2 * page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p != MAP_FAILED) {
 		dump_maps();
-		printf("Error:3: mmap() succeeded when it shouldn't have\n");
-		return 1;
+		ksft_exit_fail_msg("Error:3: mmap() succeeded when it shouldn't have\n");
 	}
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
 	/*
 	 * Overlap start of existing mapping:
@@ -161,17 +138,14 @@ int main(void)
 	 *     +3 | mapped |
 	 *     +4 |  free  |
 	 */
-	errno = 0;
 	addr = base_addr;
 	size = 2 * page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p != MAP_FAILED) {
 		dump_maps();
-		printf("Error:4: mmap() succeeded when it shouldn't have\n");
-		return 1;
+		ksft_exit_fail_msg("Error:4: mmap() succeeded when it shouldn't have\n");
 	}
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
 	/*
 	 * Adjacent to start of existing mapping:
@@ -181,17 +155,14 @@ int main(void)
 	 *     +3 | mapped |
 	 *     +4 |  free  |
 	 */
-	errno = 0;
 	addr = base_addr;
 	size = page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p == MAP_FAILED) {
 		dump_maps();
-		printf("Error:5: mmap() failed when it shouldn't have\n");
-		return 1;
+		ksft_exit_fail_msg("Error:5: mmap() failed when it shouldn't have\n");
 	}
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
 	/*
 	 * Adjacent to end of existing mapping:
@@ -201,27 +172,22 @@ int main(void)
 	 *     +3 | mapped |
 	 *     +4 |  free  |  new
 	 */
-	errno = 0;
 	addr = base_addr + (4 * page_size);
 	size = page_size;
 	p = mmap((void *)addr, size, PROT_NONE, flags, -1, 0);
-	printf("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
-
 	if (p == MAP_FAILED) {
 		dump_maps();
-		printf("Error:6: mmap() failed when it shouldn't have\n");
-		return 1;
+		ksft_exit_fail_msg("Error:6: mmap() failed when it shouldn't have\n");
 	}
+	ksft_test_result_pass("mmap() @ 0x%lx-0x%lx p=%p result=%m\n", addr, addr + size, p);
 
 	addr = base_addr;
 	size = 5 * page_size;
 	if (munmap((void *)addr, size) != 0) {
 		dump_maps();
-		printf("Error: munmap failed!?\n");
-		return 1;
+		ksft_exit_fail_msg("Error: munmap failed!?\n");
 	}
-	printf("unmap() successful\n");
+	ksft_test_result_pass("Base Address unmap() successful\n");
 
-	printf("OK\n");
-	return 0;
+	ksft_finished();
 }