[LTP] [PATCH 1/3] syscall/kcmp*: Convert to new API

[LTP] [PATCH 1/3] syscall/kcmp*: Convert to new API

[Xiao Yang]

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 testcases/kernel/syscalls/kcmp/kcmp.h   |   2 +-
 testcases/kernel/syscalls/kcmp/kcmp01.c | 119 ++++++++++++++------------------
 testcases/kernel/syscalls/kcmp/kcmp02.c |  85 ++++++++---------------
 3 files changed, 82 insertions(+), 124 deletions(-)

diff --git a/testcases/kernel/syscalls/kcmp/kcmp.h b/testcases/kernel/syscalls/kcmp/kcmp.h
index 513af39..ab50d4b 100644
--- a/testcases/kernel/syscalls/kcmp/kcmp.h
+++ b/testcases/kernel/syscalls/kcmp/kcmp.h
@@ -46,7 +46,7 @@ enum kcmp_type {
 
 int kcmp(int pid1, int pid2, int type, int fd1, int fd2)
 {
-	return ltp_syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
+	return tst_syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
 }
 
 #endif
diff --git a/testcases/kernel/syscalls/kcmp/kcmp01.c b/testcases/kernel/syscalls/kcmp/kcmp01.c
index 96d6b07..3be3948 100644
--- a/testcases/kernel/syscalls/kcmp/kcmp01.c
+++ b/testcases/kernel/syscalls/kcmp/kcmp01.c
@@ -26,23 +26,19 @@
 
 #define _GNU_SOURCE
 
-#include "test.h"
-#include "safe_macros.h"
+#include "tst_test.h"
 #include "lapi/fcntl.h"
 #include "kcmp.h"
 
 #define TEST_FILE "test_file"
 #define TEST_FILE2 "test_file2"
 
-
 static int fd1;
 static int fd2;
 static int fd3;
 static int pid1;
 static int pid2;
 
-char *TCID = "kcmp01";
-
 static struct test_case {
 	int *pid1;
 	int *pid2;
@@ -58,92 +54,79 @@ static struct test_case {
 	{&pid1, &pid2, KCMP_FILE, &fd1, &fd3, 1},
 };
 
-int TST_TOTAL = ARRAY_SIZE(test_cases);
-
-static void cleanup(void);
-static void setup(void);
-static void do_child(const struct test_case *test);
-static void cleanup_child(void);
-
-int main(int ac, char **av)
+static void cleanup(void)
 {
-	int lc;
-	int i;
-
-	tst_parse_opts(ac, av, NULL, NULL);
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
-
-		for (i = 0; i < TST_TOTAL; ++i) {
-			pid2 = tst_fork();
-
-			if (pid2 == -1)
-				tst_brkm(TBROK, cleanup, "fork failed");
+	if (fd1 > 0 && close(fd1) < 0)
+		tst_res(TWARN | TERRNO, "close fd1 failed");
+}
 
-			if (!pid2)
-				do_child(&test_cases[i]);
-			else
-				tst_record_childstatus(cleanup, pid2);
-			tst_count++;
-		}
-	}
+static void cleanup_child(void)
+{
+	if (fd2 > 0 && close(fd2) < 0)
+		tst_res(TWARN | TERRNO, "close fd2 failed");
+	fd2 = 0;
 
-	cleanup();
-	tst_exit();
+	if (fd3 > 0 && close(fd3) < 0)
+		tst_res(TWARN | TERRNO, "close fd3 failed");
+	fd3 = 0;
 }
 
 static void do_child(const struct test_case *test)
 {
 	pid2 = getpid();
+
+	fd3 = SAFE_OPEN(TEST_FILE2, O_CREAT | O_RDWR, 0666);
+
 	fd2 = dup(fd1);
-	fd3 = SAFE_OPEN(cleanup_child, TEST_FILE2, O_CREAT | O_RDWR, 0666);
+	if (fd2 == -1) {
+		tst_res(TFAIL | TERRNO, "dup() failed unexpectedly");
+		goto end;
+	}
 
 	TEST(kcmp(*(test->pid1), *(test->pid2), test->type,
-			  *(test->fd1), *(test->fd2)));
+		  *(test->fd1), *(test->fd2)));
 
-	if (TEST_RETURN == -1)
-		tst_resm(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
+	if (TEST_RETURN == -1) {
+		tst_res(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
+		goto end;
+	}
 
 	if ((test->exp_different && TEST_RETURN == 0)
-		|| (test->exp_different == 0 && TEST_RETURN))
-		tst_resm(TFAIL, "kcmp() returned %lu instead of %d",
-				TEST_RETURN, test->exp_different);
+		|| (test->exp_different == 0 && TEST_RETURN)) {
+		tst_res(TFAIL, "kcmp() returned %lu instead of %d",
+			TEST_RETURN, test->exp_different);
+		goto end;
+	}
 
 	if ((test->exp_different == 0 && TEST_RETURN == 0)
 		|| (test->exp_different && TEST_RETURN))
-		tst_resm(TPASS, "kcmp() returned the expected value");
+		tst_res(TPASS, "kcmp() returned the expected value");
 
-	tst_exit();
+end:
+	cleanup_child();
 }
 
-static void cleanup_child(void)
+static void verify_kcmp(unsigned int n)
 {
-	if (fd2 > 0 && close(fd2) < 0)
-		tst_resm(TWARN | TERRNO, "close fd2 failed");
-	fd2 = 0;
-	if (fd3 > 0 && close(fd3) < 0)
-		tst_resm(TWARN | TERRNO, "close fd3 failed");
-	fd3 = 0;
-}
+	struct test_case *tc = &test_cases[n];
 
-static void setup(void)
-{
-	if ((tst_kvercmp(3, 5, 0)) < 0) {
-		tst_brkm(TCONF, NULL,
-			"This test can only run on kernels that are 3.5. and higher");
-	}
+	pid1 = getpid();
 
-	tst_tmpdir();
+	fd1 = SAFE_OPEN(TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
 
-	pid1 = getpid();
-	fd1 = SAFE_OPEN(cleanup, TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
+	pid2 = SAFE_FORK();
+	if (!pid2)
+		do_child(tc);
+	else
+		SAFE_WAITPID(pid2, NULL, 0);
 }
 
-static void cleanup(void)
-{
-	if (fd1 > 0 && close(fd1) < 0)
-		tst_resm(TWARN | TERRNO, "close fd1 failed");
-	tst_rmdir();
-}
+static struct tst_test test = {
+	.tid = "kcmp01",
+	.tcnt = ARRAY_SIZE(test_cases),
+	.cleanup = cleanup,
+	.forks_child = 1,
+	.test = verify_kcmp,
+	.min_kver = "3.5.0",
+	.needs_tmpdir = 1,
+};
diff --git a/testcases/kernel/syscalls/kcmp/kcmp02.c b/testcases/kernel/syscalls/kcmp/kcmp02.c
index fb651d0..943c084 100644
--- a/testcases/kernel/syscalls/kcmp/kcmp02.c
+++ b/testcases/kernel/syscalls/kcmp/kcmp02.c
@@ -28,8 +28,7 @@
 
 #define _GNU_SOURCE
 
-#include "test.h"
-#include "safe_macros.h"
+#include "tst_test.h"
 #include "lapi/fcntl.h"
 #include "kcmp.h"
 
@@ -43,10 +42,9 @@ static int pid1;
 static int pid_unused;
 static int fd_fake = -1;
 
-char *TCID = "kcmp02";
-
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <limits.h>
 
 static struct test_case {
 	int *pid1;
@@ -64,75 +62,52 @@ static struct test_case {
 	{&pid1, &pid1, KCMP_FILE, &fd1, &fd_fake, EBADF}
 };
 
-int TST_TOTAL = ARRAY_SIZE(test_cases);
-
-static void cleanup(void);
-static void setup(void);
-static void kcmp_verify(const struct test_case *test);
-
-int main(int ac, char **av)
+static void setup(void)
 {
-	int lc;
-	int i;
-
-	tst_parse_opts(ac, av, NULL, NULL);
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
+	pid1 = getpid();
+	pid_unused = tst_get_unused_pid();
 
-		for (i = 0; i < TST_TOTAL; i++)
-			kcmp_verify(&test_cases[i]);
+	fd1 = SAFE_OPEN(TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
+	fd2 = SAFE_OPEN(TEST_FILE2, O_CREAT | O_RDWR | O_TRUNC);
+}
 
-	}
+static void cleanup(void)
+{
+	if (fd1 > 0 && close(fd1) < 0)
+		tst_res(TWARN | TERRNO, "close fd1 failed");
 
-	cleanup();
-	tst_exit();
+	if (fd2 > 0 && close(fd2) < 0)
+		tst_res(TWARN | TERRNO, "close fd2 failed");
 }
 
-static void kcmp_verify(const struct test_case *test)
+static void verify_kcmp(unsigned int n)
 {
+	struct test_case *test =  &test_cases[n];
+
 	TEST(kcmp(*(test->pid1), *(test->pid2), test->type,
-			  *(test->fd1), *(test->fd2)));
+		  *(test->fd1), *(test->fd2)));
 
 	if (TEST_RETURN != -1) {
-		tst_resm(TFAIL, "kcmp() succeeded unexpectedly");
+		tst_res(TFAIL, "kcmp() succeeded unexpectedly");
 		return;
 	}
 
 	if (test->exp_errno == TEST_ERRNO) {
-		tst_resm(TPASS | TTERRNO, "kcmp() returned the expected value");
+		tst_res(TPASS | TTERRNO, "kcmp() returned the expected value");
 		return;
 	}
 
-	tst_resm(TFAIL | TTERRNO,
+	tst_res(TFAIL | TTERRNO,
 		"kcmp() got unexpected return value: expected: %d - %s",
 			test->exp_errno, tst_strerrno(test->exp_errno));
 }
 
-static void setup(void)
-{
-	if ((tst_kvercmp(3, 5, 0)) < 0) {
-		tst_brkm(TCONF, NULL,
-			"This test can only run on kernels that are 3.5. and higher");
-	}
-
-	tst_tmpdir();
-
-	pid1 = getpid();
-	pid_unused = tst_get_unused_pid(cleanup);
-	fd1 = SAFE_OPEN(cleanup, TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
-	fd2 = SAFE_OPEN(cleanup, TEST_FILE2, O_CREAT | O_RDWR | O_TRUNC);
-
-}
-
-static void cleanup(void)
-{
-	if (fd1 > 0 && close(fd1) < 0)
-		tst_resm(TWARN | TERRNO, "close fd1 failed");
-
-	if (fd2 > 0 && close(fd2) < 0)
-		tst_resm(TWARN | TERRNO, "close fd2 failed");
-	tst_rmdir();
-
-}
+static struct tst_test test = {
+	.tid = "kcmp02",
+	.tcnt = ARRAY_SIZE(test_cases),
+	.setup = setup,
+	.cleanup = cleanup,
+	.test = verify_kcmp,
+	.min_kver = "3.5.0",
+	.needs_tmpdir = 1
+};
-- 
1.8.3.1

[LTP] [PATCH 2/3] lib/cloner.c: Add tst_clone.h for new API

[Xiao Yang]

Make sure the functions from lib/cloner.c can be used by new API.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 include/tst_clone.h | 39 +++++++++++++++++++++++++++++++++++++++
 include/tst_test.h  |  1 +
 lib/cloner.c        |  1 +
 3 files changed, 41 insertions(+)
 create mode 100644 include/tst_clone.h

diff --git a/include/tst_clone.h b/include/tst_clone.h
new file mode 100644
index 0000000..a6c5a5b
--- /dev/null
+++ b/include/tst_clone.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2016 Xiao Yang <yangx.jy@cn.fujitsu.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.
+ *
+ */
+
+#ifndef TST_CLONE_H__
+#define TST_CLONE_H__
+
+/* Functions from lib/cloner.c */
+int ltp_clone(unsigned long flags, int (*fn)(void *arg), void *arg,
+		size_t stack_size, void *stack);
+int ltp_clone7(unsigned long flags, int (*fn)(void *arg), void *arg,
+		size_t stack_size, void *stack, ...);
+int ltp_clone_malloc(unsigned long clone_flags, int (*fn)(void *arg),
+		void *arg, size_t stacksize);
+int ltp_clone_quick(unsigned long clone_flags, int (*fn)(void *arg),
+		void *arg);
+
+#define clone(...) (use_the_ltp_clone_functions, do_not_use_clone)
+
+#endif	/* TST_CLONE_H__ */
diff --git a/include/tst_test.h b/include/tst_test.h
index 7d0cff8..c89e51f 100644
--- a/include/tst_test.h
+++ b/include/tst_test.h
@@ -32,6 +32,7 @@
 #include "tst_process_state.h"
 #include "tst_atomic.h"
 #include "tst_kvercmp.h"
+#include "tst_clone.h"
 
 /*
  * Reports testcase result.
diff --git a/lib/cloner.c b/lib/cloner.c
index 63f223d..2947817 100644
--- a/lib/cloner.c
+++ b/lib/cloner.c
@@ -30,6 +30,7 @@
 #include <stdarg.h>
 #include "test.h"
 #include "config.h"
+#include "tst_clone.h"
 
 #undef clone			/* we want to use clone() */
 
-- 
1.8.3.1

[LTP] [PATCH 3/3] syscalls/kcmp03.c: Add new testcase

[Xiao Yang]

1) kcmp() returns 0 if the processes share the same file system
   information.
2) kcmp() returns 0 if the processes share I/O context.
3) kcmp() returns 0 if the processes share the same list of
   System V semaphore undo operations.
4) kcmp() returns 0 if the processes share the same address space.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 runtest/syscalls                        |   1 +
 testcases/kernel/syscalls/.gitignore    |   1 +
 testcases/kernel/syscalls/kcmp/kcmp03.c | 107 ++++++++++++++++++++++++++++++++
 3 files changed, 109 insertions(+)
 create mode 100644 testcases/kernel/syscalls/kcmp/kcmp03.c

diff --git a/runtest/syscalls b/runtest/syscalls
index ed63358..a76df9a 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -484,6 +484,7 @@ keyctl01 keyctl01
 
 kcmp01 kcmp01
 kcmp02 kcmp02
+kcmp03 kcmp03
 
 kill01 kill01
 kill02 kill02
diff --git a/testcases/kernel/syscalls/.gitignore b/testcases/kernel/syscalls/.gitignore
index 0512f8a..0c16830 100644
--- a/testcases/kernel/syscalls/.gitignore
+++ b/testcases/kernel/syscalls/.gitignore
@@ -452,6 +452,7 @@
 /keyctl/keyctl01
 /kcmp/kcmp01
 /kcmp/kcmp02
+/kcmp/kcmp03
 /kill/kill01
 /kill/kill02
 /kill/kill03
diff --git a/testcases/kernel/syscalls/kcmp/kcmp03.c b/testcases/kernel/syscalls/kcmp/kcmp03.c
new file mode 100644
index 0000000..e144609
--- /dev/null
+++ b/testcases/kernel/syscalls/kcmp/kcmp03.c
@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2016 Xiao Yang <yangx.jy@cn.fujitsu.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ */
+
+ /*
+ * Testname: kcmp03.c
+ *
+ * Description:
+ * 1) kcmp() returns 0 if the processes share the same file system information.
+ * 2) kcmp() returns 0 if the processes share I/O context.
+ * 3) kcmp() returns 0 if the processes share the same list of System V
+ *    semaphore undo operations.
+ * 4) kcmp() returns 0 if the processes share the same address space.
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <sys/wait.h>
+#include "tst_test.h"
+#include "kcmp.h"
+
+#ifndef CLONE_SYSVSEM
+#define CLONE_SYSVSEM	0x00040000
+#endif
+
+#ifndef CLONE_IO
+#define CLONE_IO	0x80000000
+#endif
+
+#define STACK_SIZE	(1024*1024)
+
+static int pid1;
+static int pid2;
+
+static struct tcase {
+	int clone_type;
+	int kcmp_type;
+} tcases[] = {
+	{CLONE_VM, KCMP_VM},
+	{CLONE_FS, KCMP_FS},
+	{CLONE_IO, KCMP_IO},
+	{CLONE_SYSVSEM, KCMP_SYSVSEM}
+};
+
+static int do_child(void *arg)
+{
+	pid2 = getpid();
+
+	TEST(kcmp(pid1, pid2, *(int *)arg, 0, 0));
+	if (TEST_RETURN == -1) {
+		tst_res(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
+		return 1;
+	}
+
+	if (TEST_RETURN == 0) {
+		tst_res(TPASS, "kcmp() returned the expected value");
+	} else {
+		tst_res(TFAIL, "kcmp() returned the unexpected value");
+		return 1;
+	}
+
+	return 0;
+}
+
+static void verify_kcmp(unsigned int n)
+{
+	int res;
+	void *stack;
+
+	struct tcase *tc = &tcases[n];
+
+	pid1 = getpid();
+
+	stack = SAFE_MALLOC(STACK_SIZE);
+
+	res = ltp_clone(tc->clone_type | SIGCHLD, do_child, &tc->kcmp_type,
+			STACK_SIZE, stack);
+	if (res == -1)
+		tst_res(TFAIL | TERRNO, "clone() Failed");
+
+	SAFE_WAIT(NULL);
+
+	free(stack);
+}
+
+static struct tst_test test = {
+	.tid = "kcmp03",
+	.tcnt = ARRAY_SIZE(tcases),
+	.test = verify_kcmp,
+	.min_kver = "3.5.0"
+};
-- 
1.8.3.1

[LTP] [PATCH 1/3] syscall/kcmp*: Convert to new API

[Cyril Hrubis]

Hi!
> +static void verify_kcmp(unsigned int n)
>  {
> -	if (fd2 > 0 && close(fd2) < 0)
> -		tst_resm(TWARN | TERRNO, "close fd2 failed");
> -	fd2 = 0;
> -	if (fd3 > 0 && close(fd3) < 0)
> -		tst_resm(TWARN | TERRNO, "close fd3 failed");
> -	fd3 = 0;
> -}
> +	struct test_case *tc = &test_cases[n];
>  
> -static void setup(void)
> -{
> -	if ((tst_kvercmp(3, 5, 0)) < 0) {
> -		tst_brkm(TCONF, NULL,
> -			"This test can only run on kernels that are 3.5. and higher");
> -	}
> +	pid1 = getpid();
>  
> -	tst_tmpdir();
> +	fd1 = SAFE_OPEN(TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);

This SAFE_OPEN() has to be done in the test setup, otherwise it will
start to fail with large enough iteration (-i) parameter once the
maximal number of open files is reached.


The rest looks good.

-- 
Cyril Hrubis
chrubis@suse.cz

[LTP] [PATCH 2/3] lib/cloner.c: Add tst_clone.h for new API

[Cyril Hrubis]

Hi!
> +/*
> + * Copyright (c) 2016 Xiao Yang <yangx.jy@cn.fujitsu.com>
> + *
> + * This program is free software; you can redistribute it and/or modify it
> + * under the terms of version 2 of the GNU General Public License as
> + * published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it would be useful, but
> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
> + *
> + * Further, this software is distributed without any warranty that it is
> + * free of the rightful claim of any third person regarding infringement
> + * or the like.  Any license provided herein, whether implied or
> + * otherwise, applies only to this software file.  Patent licenses, if
> + * any, provided herein do not apply to combinations of this program with
> + * other software, or any other product whatsoever.
> + *
> + * You should have received a copy of the GNU General Public License along
> + * with this program.
> + *
> + */
> +
> +#ifndef TST_CLONE_H__
> +#define TST_CLONE_H__
> +
> +/* Functions from lib/cloner.c */
> +int ltp_clone(unsigned long flags, int (*fn)(void *arg), void *arg,
> +		size_t stack_size, void *stack);
> +int ltp_clone7(unsigned long flags, int (*fn)(void *arg), void *arg,
> +		size_t stack_size, void *stack, ...);
> +int ltp_clone_malloc(unsigned long clone_flags, int (*fn)(void *arg),
> +		void *arg, size_t stacksize);
> +int ltp_clone_quick(unsigned long clone_flags, int (*fn)(void *arg),
> +		void *arg);

I'm undecided if we should rename these to start with tst_ in the new
library. Apart from that it's fine.

-- 
Cyril Hrubis
chrubis@suse.cz

[LTP] [PATCH 3/3] syscalls/kcmp03.c: Add new testcase

[Cyril Hrubis]

Hi!
> +#ifndef CLONE_SYSVSEM
> +#define CLONE_SYSVSEM	0x00040000
> +#endif
> +
> +#ifndef CLONE_IO
> +#define CLONE_IO	0x80000000
> +#endif

These should rather go to the lapi/namespaces_constants.h

> +#define STACK_SIZE	(1024*1024)
> +
> +static int pid1;
> +static int pid2;
> +
> +static struct tcase {
> +	int clone_type;
> +	int kcmp_type;
> +} tcases[] = {
> +	{CLONE_VM, KCMP_VM},
> +	{CLONE_FS, KCMP_FS},
> +	{CLONE_IO, KCMP_IO},
> +	{CLONE_SYSVSEM, KCMP_SYSVSEM}
> +};
> +
> +static int do_child(void *arg)
> +{
> +	pid2 = getpid();
> +
> +	TEST(kcmp(pid1, pid2, *(int *)arg, 0, 0));
> +
> +	if (TEST_RETURN == -1) {
> +		tst_res(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
> +		return 1;
> +	}
> +
> +	if (TEST_RETURN == 0) {
> +		tst_res(TPASS, "kcmp() returned the expected value");
> +	} else {
> +		tst_res(TFAIL, "kcmp() returned the unexpected value");
> +		return 1;

Why do we do the return 1 here if the value is not used at all? Why
don't we just fall down to the return 0; below?

> +	}
> +
> +	return 0;
> +}
> +
> +static void verify_kcmp(unsigned int n)
> +{
> +	int res;
> +	void *stack;
> +
> +	struct tcase *tc = &tcases[n];
> +
> +	pid1 = getpid();
> +
> +	stack = SAFE_MALLOC(STACK_SIZE);

Well, the stack could be allocated once in the test setup and freed in
the test cleanup.

> +	res = ltp_clone(tc->clone_type | SIGCHLD, do_child, &tc->kcmp_type,
> +			STACK_SIZE, stack);
> +	if (res == -1)
> +		tst_res(TFAIL | TERRNO, "clone() Failed");
> +
> +	SAFE_WAIT(NULL);
> +
> +	free(stack);
> +}
> +
> +static struct tst_test test = {
> +	.tid = "kcmp03",
> +	.tcnt = ARRAY_SIZE(tcases),
> +	.test = verify_kcmp,
> +	.min_kver = "3.5.0"
> +};

The rest is fine.

-- 
Cyril Hrubis
chrubis@suse.cz

[LTP] [PATCH v2 1/3] syscalls/kcmp*: Convert to new API

[Xiao Yang]

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 testcases/kernel/syscalls/kcmp/kcmp.h   |   2 +-
 testcases/kernel/syscalls/kcmp/kcmp01.c | 121 ++++++++++++++------------------
 testcases/kernel/syscalls/kcmp/kcmp02.c |  85 ++++++++--------------
 3 files changed, 84 insertions(+), 124 deletions(-)

diff --git a/testcases/kernel/syscalls/kcmp/kcmp.h b/testcases/kernel/syscalls/kcmp/kcmp.h
index 513af39..ab50d4b 100644
--- a/testcases/kernel/syscalls/kcmp/kcmp.h
+++ b/testcases/kernel/syscalls/kcmp/kcmp.h
@@ -46,7 +46,7 @@ enum kcmp_type {
 
 int kcmp(int pid1, int pid2, int type, int fd1, int fd2)
 {
-	return ltp_syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
+	return tst_syscall(__NR_kcmp, pid1, pid2, type, fd1, fd2);
 }
 
 #endif
diff --git a/testcases/kernel/syscalls/kcmp/kcmp01.c b/testcases/kernel/syscalls/kcmp/kcmp01.c
index 96d6b07..a8b43d4 100644
--- a/testcases/kernel/syscalls/kcmp/kcmp01.c
+++ b/testcases/kernel/syscalls/kcmp/kcmp01.c
@@ -26,23 +26,19 @@
 
 #define _GNU_SOURCE
 
-#include "test.h"
-#include "safe_macros.h"
+#include "tst_test.h"
 #include "lapi/fcntl.h"
 #include "kcmp.h"
 
 #define TEST_FILE "test_file"
 #define TEST_FILE2 "test_file2"
 
-
 static int fd1;
 static int fd2;
 static int fd3;
 static int pid1;
 static int pid2;
 
-char *TCID = "kcmp01";
-
 static struct test_case {
 	int *pid1;
 	int *pid2;
@@ -58,92 +54,81 @@ static struct test_case {
 	{&pid1, &pid2, KCMP_FILE, &fd1, &fd3, 1},
 };
 
-int TST_TOTAL = ARRAY_SIZE(test_cases);
-
-static void cleanup(void);
-static void setup(void);
-static void do_child(const struct test_case *test);
-static void cleanup_child(void);
-
-int main(int ac, char **av)
+static void setup(void)
 {
-	int lc;
-	int i;
-
-	tst_parse_opts(ac, av, NULL, NULL);
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
-
-		for (i = 0; i < TST_TOTAL; ++i) {
-			pid2 = tst_fork();
+	fd1 = SAFE_OPEN(TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
+}
 
-			if (pid2 == -1)
-				tst_brkm(TBROK, cleanup, "fork failed");
+static void cleanup(void)
+{
+	if (fd1 > 0 && close(fd1) < 0)
+		tst_res(TWARN | TERRNO, "close fd1 failed");
+}
 
-			if (!pid2)
-				do_child(&test_cases[i]);
-			else
-				tst_record_childstatus(cleanup, pid2);
-			tst_count++;
-		}
-	}
+static void cleanup_child(void)
+{
+	if (fd2 > 0 && close(fd2) < 0)
+		tst_res(TWARN | TERRNO, "close fd2 failed");
+	fd2 = 0;
 
-	cleanup();
-	tst_exit();
+	if (fd3 > 0 && close(fd3) < 0)
+		tst_res(TWARN | TERRNO, "close fd3 failed");
+	fd3 = 0;
 }
 
 static void do_child(const struct test_case *test)
 {
 	pid2 = getpid();
+
+	fd3 = SAFE_OPEN(TEST_FILE2, O_CREAT | O_RDWR, 0666);
+
 	fd2 = dup(fd1);
-	fd3 = SAFE_OPEN(cleanup_child, TEST_FILE2, O_CREAT | O_RDWR, 0666);
+	if (fd2 == -1) {
+		tst_res(TFAIL | TERRNO, "dup() failed unexpectedly");
+		goto end;
+	}
 
 	TEST(kcmp(*(test->pid1), *(test->pid2), test->type,
-			  *(test->fd1), *(test->fd2)));
+		  *(test->fd1), *(test->fd2)));
 
-	if (TEST_RETURN == -1)
-		tst_resm(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
+	if (TEST_RETURN == -1) {
+		tst_res(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
+		goto end;
+	}
 
 	if ((test->exp_different && TEST_RETURN == 0)
-		|| (test->exp_different == 0 && TEST_RETURN))
-		tst_resm(TFAIL, "kcmp() returned %lu instead of %d",
-				TEST_RETURN, test->exp_different);
+		|| (test->exp_different == 0 && TEST_RETURN)) {
+		tst_res(TFAIL, "kcmp() returned %lu instead of %d",
+			TEST_RETURN, test->exp_different);
+		goto end;
+	}
 
 	if ((test->exp_different == 0 && TEST_RETURN == 0)
 		|| (test->exp_different && TEST_RETURN))
-		tst_resm(TPASS, "kcmp() returned the expected value");
+		tst_res(TPASS, "kcmp() returned the expected value");
 
-	tst_exit();
+end:
+	cleanup_child();
 }
 
-static void cleanup_child(void)
+static void verify_kcmp(unsigned int n)
 {
-	if (fd2 > 0 && close(fd2) < 0)
-		tst_resm(TWARN | TERRNO, "close fd2 failed");
-	fd2 = 0;
-	if (fd3 > 0 && close(fd3) < 0)
-		tst_resm(TWARN | TERRNO, "close fd3 failed");
-	fd3 = 0;
-}
-
-static void setup(void)
-{
-	if ((tst_kvercmp(3, 5, 0)) < 0) {
-		tst_brkm(TCONF, NULL,
-			"This test can only run on kernels that are 3.5. and higher");
-	}
-
-	tst_tmpdir();
+	struct test_case *tc = &test_cases[n];
 
 	pid1 = getpid();
-	fd1 = SAFE_OPEN(cleanup, TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
-}
 
-static void cleanup(void)
-{
-	if (fd1 > 0 && close(fd1) < 0)
-		tst_resm(TWARN | TERRNO, "close fd1 failed");
-	tst_rmdir();
+	pid2 = SAFE_FORK();
+	if (!pid2)
+		do_child(tc);
 }
+
+static struct tst_test test = {
+	.tid = "kcmp01",
+	.tcnt = ARRAY_SIZE(test_cases),
+	.setup = setup,
+	.cleanup = cleanup,
+	.forks_child = 1,
+	.test = verify_kcmp,
+	.min_kver = "3.5.0",
+	.needs_tmpdir = 1,
+};
diff --git a/testcases/kernel/syscalls/kcmp/kcmp02.c b/testcases/kernel/syscalls/kcmp/kcmp02.c
index fb651d0..943c084 100644
--- a/testcases/kernel/syscalls/kcmp/kcmp02.c
+++ b/testcases/kernel/syscalls/kcmp/kcmp02.c
@@ -28,8 +28,7 @@
 
 #define _GNU_SOURCE
 
-#include "test.h"
-#include "safe_macros.h"
+#include "tst_test.h"
 #include "lapi/fcntl.h"
 #include "kcmp.h"
 
@@ -43,10 +42,9 @@ static int pid1;
 static int pid_unused;
 static int fd_fake = -1;
 
-char *TCID = "kcmp02";
-
 #include <sys/types.h>
 #include <sys/wait.h>
+#include <limits.h>
 
 static struct test_case {
 	int *pid1;
@@ -64,75 +62,52 @@ static struct test_case {
 	{&pid1, &pid1, KCMP_FILE, &fd1, &fd_fake, EBADF}
 };
 
-int TST_TOTAL = ARRAY_SIZE(test_cases);
-
-static void cleanup(void);
-static void setup(void);
-static void kcmp_verify(const struct test_case *test);
-
-int main(int ac, char **av)
+static void setup(void)
 {
-	int lc;
-	int i;
-
-	tst_parse_opts(ac, av, NULL, NULL);
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
+	pid1 = getpid();
+	pid_unused = tst_get_unused_pid();
 
-		for (i = 0; i < TST_TOTAL; i++)
-			kcmp_verify(&test_cases[i]);
+	fd1 = SAFE_OPEN(TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
+	fd2 = SAFE_OPEN(TEST_FILE2, O_CREAT | O_RDWR | O_TRUNC);
+}
 
-	}
+static void cleanup(void)
+{
+	if (fd1 > 0 && close(fd1) < 0)
+		tst_res(TWARN | TERRNO, "close fd1 failed");
 
-	cleanup();
-	tst_exit();
+	if (fd2 > 0 && close(fd2) < 0)
+		tst_res(TWARN | TERRNO, "close fd2 failed");
 }
 
-static void kcmp_verify(const struct test_case *test)
+static void verify_kcmp(unsigned int n)
 {
+	struct test_case *test =  &test_cases[n];
+
 	TEST(kcmp(*(test->pid1), *(test->pid2), test->type,
-			  *(test->fd1), *(test->fd2)));
+		  *(test->fd1), *(test->fd2)));
 
 	if (TEST_RETURN != -1) {
-		tst_resm(TFAIL, "kcmp() succeeded unexpectedly");
+		tst_res(TFAIL, "kcmp() succeeded unexpectedly");
 		return;
 	}
 
 	if (test->exp_errno == TEST_ERRNO) {
-		tst_resm(TPASS | TTERRNO, "kcmp() returned the expected value");
+		tst_res(TPASS | TTERRNO, "kcmp() returned the expected value");
 		return;
 	}
 
-	tst_resm(TFAIL | TTERRNO,
+	tst_res(TFAIL | TTERRNO,
 		"kcmp() got unexpected return value: expected: %d - %s",
 			test->exp_errno, tst_strerrno(test->exp_errno));
 }
 
-static void setup(void)
-{
-	if ((tst_kvercmp(3, 5, 0)) < 0) {
-		tst_brkm(TCONF, NULL,
-			"This test can only run on kernels that are 3.5. and higher");
-	}
-
-	tst_tmpdir();
-
-	pid1 = getpid();
-	pid_unused = tst_get_unused_pid(cleanup);
-	fd1 = SAFE_OPEN(cleanup, TEST_FILE, O_CREAT | O_RDWR | O_TRUNC);
-	fd2 = SAFE_OPEN(cleanup, TEST_FILE2, O_CREAT | O_RDWR | O_TRUNC);
-
-}
-
-static void cleanup(void)
-{
-	if (fd1 > 0 && close(fd1) < 0)
-		tst_resm(TWARN | TERRNO, "close fd1 failed");
-
-	if (fd2 > 0 && close(fd2) < 0)
-		tst_resm(TWARN | TERRNO, "close fd2 failed");
-	tst_rmdir();
-
-}
+static struct tst_test test = {
+	.tid = "kcmp02",
+	.tcnt = ARRAY_SIZE(test_cases),
+	.setup = setup,
+	.cleanup = cleanup,
+	.test = verify_kcmp,
+	.min_kver = "3.5.0",
+	.needs_tmpdir = 1
+};
-- 
1.8.3.1

[LTP] [PATCH v2 2/3] lib/cloner.c: Add tst_clone.h for new API

[Xiao Yang]

Make sure the functions from lib/cloner.c can be used by new API.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 include/tst_clone.h | 39 +++++++++++++++++++++++++++++++++++++++
 include/tst_test.h  |  1 +
 lib/cloner.c        |  1 +
 3 files changed, 41 insertions(+)
 create mode 100644 include/tst_clone.h

diff --git a/include/tst_clone.h b/include/tst_clone.h
new file mode 100644
index 0000000..a6c5a5b
--- /dev/null
+++ b/include/tst_clone.h
@@ -0,0 +1,39 @@
+/*
+ * Copyright (c) 2016 Xiao Yang <yangx.jy@cn.fujitsu.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program.
+ *
+ */
+
+#ifndef TST_CLONE_H__
+#define TST_CLONE_H__
+
+/* Functions from lib/cloner.c */
+int ltp_clone(unsigned long flags, int (*fn)(void *arg), void *arg,
+		size_t stack_size, void *stack);
+int ltp_clone7(unsigned long flags, int (*fn)(void *arg), void *arg,
+		size_t stack_size, void *stack, ...);
+int ltp_clone_malloc(unsigned long clone_flags, int (*fn)(void *arg),
+		void *arg, size_t stacksize);
+int ltp_clone_quick(unsigned long clone_flags, int (*fn)(void *arg),
+		void *arg);
+
+#define clone(...) (use_the_ltp_clone_functions, do_not_use_clone)
+
+#endif	/* TST_CLONE_H__ */
diff --git a/include/tst_test.h b/include/tst_test.h
index 7d0cff8..c89e51f 100644
--- a/include/tst_test.h
+++ b/include/tst_test.h
@@ -32,6 +32,7 @@
 #include "tst_process_state.h"
 #include "tst_atomic.h"
 #include "tst_kvercmp.h"
+#include "tst_clone.h"
 
 /*
  * Reports testcase result.
diff --git a/lib/cloner.c b/lib/cloner.c
index 63f223d..2947817 100644
--- a/lib/cloner.c
+++ b/lib/cloner.c
@@ -30,6 +30,7 @@
 #include <stdarg.h>
 #include "test.h"
 #include "config.h"
+#include "tst_clone.h"
 
 #undef clone			/* we want to use clone() */
 
-- 
1.8.3.1

[LTP] [PATCH v2 3/3] syscalls/kcmp03.c: Add new testcase

[Xiao Yang]

1) kcmp() returns 0 if the processes share the same file system
   information.
2) kcmp() returns 0 if the processes share I/O context.
3) kcmp() returns 0 if the processes share the same list of
   System V semaphore undo operations.
4) kcmp() returns 0 if the processes share the same address space.

Signed-off-by: Xiao Yang <yangx.jy@cn.fujitsu.com>
---
 include/lapi/sched.h                    |  16 +++++
 runtest/syscalls                        |   1 +
 testcases/kernel/syscalls/.gitignore    |   1 +
 testcases/kernel/syscalls/kcmp/kcmp03.c | 105 ++++++++++++++++++++++++++++++++
 4 files changed, 123 insertions(+)
 create mode 100644 testcases/kernel/syscalls/kcmp/kcmp03.c

diff --git a/include/lapi/sched.h b/include/lapi/sched.h
index 189c2de..a0efbb0 100644
--- a/include/lapi/sched.h
+++ b/include/lapi/sched.h
@@ -56,4 +56,20 @@ int sched_getattr(pid_t pid,
 	return syscall(__NR_sched_getattr, pid, attr, size, flags);
 }
 
+#ifndef CLONE_VM
+#define CLONE_VM   0x00000100
+#endif
+
+#ifndef CLONE_FS
+#define CLONE_FS   0x00000200
+#endif
+
+#ifndef CLONE_SYSVSEM
+#define CLONE_SYSVSEM   0x00040000
+#endif
+
+#ifndef CLONE_IO
+#define CLONE_IO        0x80000000
+#endif
+
 #endif /* __SCHED_H__ */
diff --git a/runtest/syscalls b/runtest/syscalls
index 40b3257..75fdd4a 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -484,6 +484,7 @@ keyctl01 keyctl01
 
 kcmp01 kcmp01
 kcmp02 kcmp02
+kcmp03 kcmp03
 
 kill01 kill01
 kill02 kill02
diff --git a/testcases/kernel/syscalls/.gitignore b/testcases/kernel/syscalls/.gitignore
index fb980ba..217b38e 100644
--- a/testcases/kernel/syscalls/.gitignore
+++ b/testcases/kernel/syscalls/.gitignore
@@ -452,6 +452,7 @@
 /keyctl/keyctl01
 /kcmp/kcmp01
 /kcmp/kcmp02
+/kcmp/kcmp03
 /kill/kill01
 /kill/kill02
 /kill/kill03
diff --git a/testcases/kernel/syscalls/kcmp/kcmp03.c b/testcases/kernel/syscalls/kcmp/kcmp03.c
new file mode 100644
index 0000000..d64ea2c
--- /dev/null
+++ b/testcases/kernel/syscalls/kcmp/kcmp03.c
@@ -0,0 +1,105 @@
+/*
+ * Copyright (c) 2016 Xiao Yang <yangx.jy@cn.fujitsu.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.
+ */
+
+ /*
+ * Testname: kcmp03.c
+ *
+ * Description:
+ * 1) kcmp() returns 0 if the processes share the same file system information.
+ * 2) kcmp() returns 0 if the processes share I/O context.
+ * 3) kcmp() returns 0 if the processes share the same list of System V
+ *    semaphore undo operations.
+ * 4) kcmp() returns 0 if the processes share the same address space.
+ */
+
+#define _GNU_SOURCE
+
+#include <errno.h>
+#include <stdlib.h>
+#include <sched.h>
+#include <sys/wait.h>
+#include "tst_test.h"
+#include "kcmp.h"
+#include "lapi/sched.h"
+
+#define STACK_SIZE	(1024*1024)
+
+static int pid1;
+static int pid2;
+static void *stack;
+
+static struct tcase {
+	int clone_type;
+	int kcmp_type;
+} tcases[] = {
+	{CLONE_VM, KCMP_VM},
+	{CLONE_FS, KCMP_FS},
+	{CLONE_IO, KCMP_IO},
+	{CLONE_SYSVSEM, KCMP_SYSVSEM}
+};
+
+static void setup(void)
+{
+	stack = SAFE_MALLOC(STACK_SIZE);
+}
+
+static void cleanup(void)
+{
+	free(stack);
+}
+
+static int do_child(void *arg)
+{
+	pid2 = getpid();
+
+	TEST(kcmp(pid1, pid2, *(int *)arg, 0, 0));
+	if (TEST_RETURN == -1) {
+		tst_res(TFAIL | TTERRNO, "kcmp() failed unexpectedly");
+		return 0;
+	}
+
+	if (TEST_RETURN == 0)
+		tst_res(TPASS, "kcmp() returned the expected value");
+	else
+		tst_res(TFAIL, "kcmp() returned the unexpected value");
+
+	return 0;
+}
+
+static void verify_kcmp(unsigned int n)
+{
+	int res;
+
+	struct tcase *tc = &tcases[n];
+
+	pid1 = getpid();
+
+	res = ltp_clone(tc->clone_type | SIGCHLD, do_child, &tc->kcmp_type,
+			STACK_SIZE, stack);
+	if (res == -1)
+		tst_res(TFAIL | TERRNO, "clone() Failed");
+}
+
+static struct tst_test test = {
+	.tid = "kcmp03",
+	.tcnt = ARRAY_SIZE(tcases),
+	.setup = setup,
+	.cleanup = cleanup,
+	.forks_child = 1,
+	.test = verify_kcmp,
+	.min_kver = "3.5.0"
+};
-- 
1.8.3.1

[LTP] [PATCH v2 1/3] syscalls/kcmp*: Convert to new API

[Cyril Hrubis]

Hi!
I've simplified the kcmp01.c a bit and pushed, thanks.

(We can safely use SAFE_CLOSE() in child since it's cleanup is not
executed from test cleanup())

-- 
Cyril Hrubis
chrubis@suse.cz

[LTP] [PATCH v2 2/3] lib/cloner.c: Add tst_clone.h for new API

[Cyril Hrubis]

Hi!
> Make sure the functions from lib/cloner.c can be used by new API.

I've made use of the tst_clone.h in the test.h as well, since it does
not makes sense to keep two copies of the function prototypes and
pushed, thanks.

-- 
Cyril Hrubis
chrubis@suse.cz

[LTP] [PATCH v2 3/3] syscalls/kcmp03.c: Add new testcase

[Cyril Hrubis]

Hi!
Pushed, thanks.

-- 
Cyril Hrubis
chrubis@suse.cz