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From: Muhammad Usama Anjum <usama.anjum@collabora.com>
To: Andrew Morton <akpm@linux-foundation.org>,
	Shuah Khan <shuah@kernel.org>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>,
	kernel@collabora.com,
	linux-mm@kvack.org,
	linux-kselftest@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 5/7] selftests/mm: hugetlb-read-hwpoison: conform test to TAP format output
Date: Fri, 12 Jan 2024 12:21:38 +0500
Message-ID: <20240112072144.620098-5-usama.anjum@collabora.com>
In-Reply-To: <20240112072144.620098-1-usama.anjum@collabora.com>
References: <20240112072144.620098-1-usama.anjum@collabora.com>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

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

Signed-off-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
---
Tested this by reverting the patch a08c7193e4f18dc8508f2d07d0de2c5b94cb39a3
("mm/filemap: remove hugetlb special casing in filemap.c") as it has
broken the test. The bug report can be found at [1].

Tested with proposed fix as well [2].

[1] https://lore.kernel.org/all/079335ab-190f-41f7-b832-6ffe7528fd8b@collabora.com
[2] https://lore.kernel.org/all/a20e7bdb-7344-306d-e8f5-5ee69af7d5ea@oracle.com
---
 .../selftests/mm/hugetlb-read-hwpoison.c      | 116 +++++++++---------
 1 file changed, 56 insertions(+), 60 deletions(-)

diff --git a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
index ba6cc6f9cabc..193ad7275df5 100644
--- a/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
+++ b/tools/testing/selftests/mm/hugetlb-read-hwpoison.c
@@ -58,8 +58,8 @@ static bool verify_chunk(char *buf, size_t len, char val)
 
 	for (i = 0; i < len; ++i) {
 		if (buf[i] != val) {
-			printf(PREFIX ERROR_PREFIX "check fail: buf[%lu] = %u != %u\n",
-				i, buf[i], val);
+			ksft_print_msg(PREFIX ERROR_PREFIX "check fail: buf[%lu] = %u != %u\n",
+				       i, buf[i], val);
 			return false;
 		}
 	}
@@ -75,9 +75,9 @@ static bool seek_read_hugepage_filemap(int fd, size_t len, size_t wr_chunk_size,
 	ssize_t total_ret_count = 0;
 	char val = offset / wr_chunk_size + offset % wr_chunk_size;
 
-	printf(PREFIX PREFIX "init val=%u with offset=0x%lx\n", val, offset);
-	printf(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
-	       expected);
+	ksft_print_msg(PREFIX PREFIX "init val=%u with offset=0x%lx\n", val, offset);
+	ksft_print_msg(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
+		       expected);
 	if (lseek(fd, offset, SEEK_SET) < 0) {
 		perror(PREFIX ERROR_PREFIX "seek failed");
 		return false;
@@ -86,7 +86,7 @@ static bool seek_read_hugepage_filemap(int fd, size_t len, size_t wr_chunk_size,
 	while (offset + total_ret_count < len) {
 		ret_count = read(fd, buf, wr_chunk_size);
 		if (ret_count == 0) {
-			printf(PREFIX PREFIX "read reach end of the file\n");
+			ksft_print_msg(PREFIX PREFIX "read reach end of the file\n");
 			break;
 		} else if (ret_count < 0) {
 			perror(PREFIX ERROR_PREFIX "read failed");
@@ -98,8 +98,8 @@ static bool seek_read_hugepage_filemap(int fd, size_t len, size_t wr_chunk_size,
 
 		total_ret_count += ret_count;
 	}
-	printf(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
-	       total_ret_count);
+	ksft_print_msg(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
+		       total_ret_count);
 
 	return total_ret_count == expected;
 }
@@ -112,15 +112,15 @@ static bool read_hugepage_filemap(int fd, size_t len,
 	ssize_t total_ret_count = 0;
 	char val = 0;
 
-	printf(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
-	       expected);
+	ksft_print_msg(PREFIX PREFIX "expect to read 0x%lx bytes of data in total\n",
+		       expected);
 	while (total_ret_count < len) {
 		ret_count = read(fd, buf, wr_chunk_size);
 		if (ret_count == 0) {
-			printf(PREFIX PREFIX "read reach end of the file\n");
+			ksft_print_msg(PREFIX PREFIX "read reach end of the file\n");
 			break;
 		} else if (ret_count < 0) {
-			perror(PREFIX ERROR_PREFIX "read failed");
+			ksft_print_msg(PREFIX ERROR_PREFIX "read failed");
 			break;
 		}
 		++val;
@@ -129,8 +129,8 @@ static bool read_hugepage_filemap(int fd, size_t len,
 
 		total_ret_count += ret_count;
 	}
-	printf(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
-	       total_ret_count);
+	ksft_print_msg(PREFIX PREFIX "actually read 0x%lx bytes of data in total\n",
+		       total_ret_count);
 
 	return total_ret_count == expected;
 }
@@ -142,14 +142,15 @@ test_hugetlb_read(int fd, size_t len, size_t wr_chunk_size)
 	char *filemap = NULL;
 
 	if (ftruncate(fd, len) < 0) {
-		perror(PREFIX ERROR_PREFIX "ftruncate failed");
+		ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate failed: %s\n", strerror(errno));
 		return status;
 	}
 
 	filemap = mmap(NULL, len, PROT_READ | PROT_WRITE,
 		       MAP_SHARED | MAP_POPULATE, fd, 0);
 	if (filemap == MAP_FAILED) {
-		perror(PREFIX ERROR_PREFIX "mmap for primary mapping failed");
+		ksft_print_msg(PREFIX ERROR_PREFIX "mmap for primary mapping failed: %s\n",
+			       strerror(errno));
 		goto done;
 	}
 
@@ -162,7 +163,8 @@ test_hugetlb_read(int fd, size_t len, size_t wr_chunk_size)
 	munmap(filemap, len);
 done:
 	if (ftruncate(fd, 0) < 0) {
-		perror(PREFIX ERROR_PREFIX "ftruncate back to 0 failed");
+		ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate back to 0 failed : %s\n",
+			       strerror(errno));
 		status = TEST_FAILED;
 	}
 
@@ -179,14 +181,15 @@ test_hugetlb_read_hwpoison(int fd, size_t len, size_t wr_chunk_size,
 	const unsigned long pagesize = getpagesize();
 
 	if (ftruncate(fd, len) < 0) {
-		perror(PREFIX ERROR_PREFIX "ftruncate failed");
+		ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate failed: %s\n", strerror(errno));
 		return status;
 	}
 
 	filemap = mmap(NULL, len, PROT_READ | PROT_WRITE,
 		       MAP_SHARED | MAP_POPULATE, fd, 0);
 	if (filemap == MAP_FAILED) {
-		perror(PREFIX ERROR_PREFIX "mmap for primary mapping failed");
+		ksft_print_msg(PREFIX ERROR_PREFIX "mmap for primary mapping failed: %s\n",
+			       strerror(errno));
 		goto done;
 	}
 
@@ -201,7 +204,7 @@ test_hugetlb_read_hwpoison(int fd, size_t len, size_t wr_chunk_size,
 	 */
 	hwp_addr = filemap + len / 2 + pagesize;
 	if (madvise(hwp_addr, pagesize, MADV_HWPOISON) < 0) {
-		perror(PREFIX ERROR_PREFIX "MADV_HWPOISON failed");
+		ksft_print_msg(PREFIX ERROR_PREFIX "MADV_HWPOISON failed: %s\n", strerror(errno));
 		goto unmap;
 	}
 
@@ -228,7 +231,8 @@ test_hugetlb_read_hwpoison(int fd, size_t len, size_t wr_chunk_size,
 	munmap(filemap, len);
 done:
 	if (ftruncate(fd, 0) < 0) {
-		perror(PREFIX ERROR_PREFIX "ftruncate back to 0 failed");
+		ksft_print_msg(PREFIX ERROR_PREFIX "ftruncate back to 0 failed: %s\n",
+			       strerror(errno));
 		status = TEST_FAILED;
 	}
 
@@ -240,27 +244,32 @@ static int create_hugetlbfs_file(struct statfs *file_stat)
 	int fd;
 
 	fd = memfd_create("hugetlb_tmp", MFD_HUGETLB);
-	if (fd < 0) {
-		perror(PREFIX ERROR_PREFIX "could not open hugetlbfs file");
-		return -1;
-	}
+	if (fd < 0)
+		ksft_exit_fail_msg(PREFIX ERROR_PREFIX "could not open hugetlbfs file: %s\n",
+				   strerror(errno));
 
 	memset(file_stat, 0, sizeof(*file_stat));
+
 	if (fstatfs(fd, file_stat)) {
-		perror(PREFIX ERROR_PREFIX "fstatfs failed");
-		goto close;
+		close(fd);
+		ksft_exit_fail_msg(PREFIX ERROR_PREFIX "fstatfs failed: %s\n", strerror(errno));
 	}
 	if (file_stat->f_type != HUGETLBFS_MAGIC) {
-		printf(PREFIX ERROR_PREFIX "not hugetlbfs file\n");
-		goto close;
+		close(fd);
+		ksft_exit_fail_msg(PREFIX ERROR_PREFIX "not hugetlbfs file\n");
 	}
 
 	return fd;
-close:
-	close(fd);
-	return -1;
 }
 
+#define KSFT_PRINT_MSG(status, fmt, ...)					\
+	do {									\
+		if (status == TEST_SKIPPED)					\
+			ksft_test_result_skip(fmt, __VA_ARGS__);		\
+		else								\
+			ksft_test_result(status == TEST_PASSED, fmt, __VA_ARGS__); \
+	} while (0)
+
 int main(void)
 {
 	int fd;
@@ -273,50 +282,37 @@ int main(void)
 	};
 	size_t i;
 
+	ksft_print_header();
+	ksft_set_plan(12);
+
 	for (i = 0; i < ARRAY_SIZE(wr_chunk_sizes); ++i) {
-		printf("Write/read chunk size=0x%lx\n",
-		       wr_chunk_sizes[i]);
+		ksft_print_msg("Write/read chunk size=0x%lx\n",
+			       wr_chunk_sizes[i]);
 
 		fd = create_hugetlbfs_file(&file_stat);
-		if (fd < 0)
-			goto create_failure;
-		printf(PREFIX "HugeTLB read regression test...\n");
+		ksft_print_msg(PREFIX "HugeTLB read regression test...\n");
 		status = test_hugetlb_read(fd, file_stat.f_bsize,
 					   wr_chunk_sizes[i]);
-		printf(PREFIX "HugeTLB read regression test...%s\n",
-		       status_to_str(status));
+		KSFT_PRINT_MSG(status, PREFIX "HugeTLB read regression test...%s\n",
+			       status_to_str(status));
 		close(fd);
-		if (status == TEST_FAILED)
-			return -1;
 
 		fd = create_hugetlbfs_file(&file_stat);
-		if (fd < 0)
-			goto create_failure;
-		printf(PREFIX "HugeTLB read HWPOISON test...\n");
+		ksft_print_msg(PREFIX "HugeTLB read HWPOISON test...\n");
 		status = test_hugetlb_read_hwpoison(fd, file_stat.f_bsize,
 						    wr_chunk_sizes[i], false);
-		printf(PREFIX "HugeTLB read HWPOISON test...%s\n",
-		       status_to_str(status));
+		KSFT_PRINT_MSG(status, PREFIX "HugeTLB read HWPOISON test...%s\n",
+			       status_to_str(status));
 		close(fd);
-		if (status == TEST_FAILED)
-			return -1;
 
 		fd = create_hugetlbfs_file(&file_stat);
-		if (fd < 0)
-			goto create_failure;
-		printf(PREFIX "HugeTLB seek then read HWPOISON test...\n");
+		ksft_print_msg(PREFIX "HugeTLB seek then read HWPOISON test...\n");
 		status = test_hugetlb_read_hwpoison(fd, file_stat.f_bsize,
 						    wr_chunk_sizes[i], true);
-		printf(PREFIX "HugeTLB seek then read HWPOISON test...%s\n",
-		       status_to_str(status));
+		KSFT_PRINT_MSG(status, PREFIX "HugeTLB seek then read HWPOISON test...%s\n",
+			       status_to_str(status));
 		close(fd);
-		if (status == TEST_FAILED)
-			return -1;
 	}
 
-	return 0;
-
-create_failure:
-	printf(ERROR_PREFIX "Abort test: failed to create hugetlbfs file\n");
-	return -1;
+	ksft_finished();
 }
-- 
2.42.0