[LTP] [PATCH] read/read02.c: cleanup

[LTP] [PATCH] read/read02.c: cleanup

[Zeng Linggang]

* Delete some useless commtents and variable.
* Use SAFE_* macros.
* Some cleanup.

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
---
 testcases/kernel/syscalls/read/read02.c | 217 +++++++++++---------------------
 1 file changed, 74 insertions(+), 143 deletions(-)

diff --git a/testcases/kernel/syscalls/read/read02.c b/testcases/kernel/syscalls/read/read02.c
index 8681662..8aabe93 100644
--- a/testcases/kernel/syscalls/read/read02.c
+++ b/testcases/kernel/syscalls/read/read02.c
@@ -1,63 +1,36 @@
 /*
+ * Copyright (c) International Business Machines  Corp., 2001
+ *	07/2001 Ported by Wayne Boyer
  *
- *   Copyright (c) International Business Machines  Corp., 2001
- *
- *   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 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 will 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.
+ * This program is distributed in the hope that it will 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;  if not, write to the Free Software
- *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * You should have received a copy of the GNU General Public License
+ * along with this program;  if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
-
 /*
- * NAME
- * 	read02.c
- *
  * DESCRIPTION
- * 	test 1:
- *	Does read return -1 if file descriptor is not valid, check for EBADF
+ *	test 1:
+ *	Read with an invalid file descriptor, and expect an EBADF.
  *
  *	test 2:
- *	Check if read sets EISDIR, if the fd refers to a directory
- *
- * 	test 3:
- * 	Check if read sets EFAULT, if buf is -1.
- *$
- * ALGORITHM
- * 	test 1:
- * 	Read with an invalid file descriptor, and expect an EBADF
+ *	The parameter passed to read is a directory, check if the errno is
+ *	set to EISDIR.
  *
- * 	test 2:
- * 	The parameter passed to read is a directory, check if the errno is
- * 	set to EISDIR.
- *
- * 	test 3:
- * 	Pass buf = -1 as a parmeter to read, expect an EFAULT.
- *$
- * USAGE:  <for command-line>
- *  read02 [-c n] [-e] [-i n] [-I x] [-P x] [-t]
- *     where,  -c n : Run n copies concurrently.
- *             -e   : Turn on errno logging.
- *             -i n : Execute test n times.
- *             -I x : Execute test for x seconds.
- *             -P x : Pause for x seconds between iterations.
- *             -t   : Turn on syscall timing.
- *
- * HISTORY
- *	07/2001 Ported by Wayne Boyer
- *
- * RESTRICTIONS
- * 	None
+ *	test 3:
+ *	Pass buf = -1 as a parmeter to read, expect an EFAULT.
  */
-#define _GNU_SOURCE		/* for O_DIRECTORY */
+
+#define _GNU_SOURCE
+
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
@@ -65,43 +38,31 @@
 #include <sys/mman.h>
 #include "test.h"
 #include "usctest.h"
+#include "safe_macros.h"
 
-void cleanup(void);
-void setup(void);
+#define TEST_FILE	"test_file"
 
 char *TCID = "read02";
 
-char file[BUFSIZ];
-char fname[100] = "/tmp/tstfile";
-
-int exp_enos[] = { EBADF, EISDIR, EFAULT, 0 };
-
-int badfd = -1;
-int fd2, fd3;
-char buf[BUFSIZ];
+static int badfd = -1;
+static int fd2, fd3;
+static char buf[BUFSIZ];
+static int exp_enos[] = { EBADF, EISDIR, EFAULT, 0 };
 
-struct test_case_t {
+static struct test_case_t {
 	int *fd;
 	void *buf;
-	int error;
+	int exp_error;
 } TC[] = {
-	/* the file descriptor is invalid - EBADF */
-	{
-	&badfd, buf, EBADF},
-	    /* the file descriptor is a directory - EISDIR */
-	{
-	&fd2, buf, EISDIR,},
-#ifndef UCLINUX
-	    /* Skip since uClinux does not implement memory protection */
-	    /* the buffer is invalid - EFAULT */
-	{
-	&fd3, (void *)-1, EFAULT}
-#endif
+	{&badfd, buf, EBADF},
+	{&fd2, buf, EISDIR},
+	{&fd3, (void *)-1, EFAULT},
 };
 
-int TST_TOTAL = sizeof(TC) / sizeof(*TC);
-
-char *bad_addr = 0;
+int TST_TOTAL = ARRAY_SIZE(TC);
+static void setup(void);
+static void cleanup(void);
+static void read_verify(const struct test_case_t *);
 
 int main(int ac, char **av)
 {
@@ -109,98 +70,68 @@ int main(int ac, char **av)
 	int lc;
 	char *msg;
 
-	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL) {
+	msg = parse_opts(ac, av, NULL, NULL);
+	if (msg != NULL)
 		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);
-	}
 
 	setup();
 
-	/* set up the expected errnos */
 	TEST_EXP_ENOS(exp_enos);
 
-	/*
-	 * The following loop checks looping state if -i option given
-	 */
 	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		/* reset tst_count in case we are looping */
 		tst_count = 0;
-
-		/* loop through the test cases */
-		for (i = 0; i < TST_TOTAL; i++) {
-
-			TEST(read(*TC[i].fd, TC[i].buf, 1));
-
-			if (TEST_RETURN != -1) {
-				tst_resm(TFAIL, "call succeeded unexpectedly");
-				continue;
-			}
-
-			TEST_ERROR_LOG(TEST_ERRNO);
-
-			if (TEST_ERRNO == TC[i].error) {
-				tst_resm(TPASS, "expected failure - "
-					 "errno = %d : %s", TEST_ERRNO,
-					 strerror(TEST_ERRNO));
-			} else {
-				tst_resm(TFAIL, "unexpected error - %d : %s - "
-					 "expected %d", TEST_ERRNO,
-					 strerror(TEST_ERRNO), TC[i].error);
-			}
-		}
+		for (i = 0; i < TST_TOTAL; i++)
+			read_verify(&TC[i]);
 	}
 	cleanup();
 	tst_exit();
 }
 
-/*
- * setup() - performs all ONE TIME setup for this test
- */
-void setup(void)
+static void setup(void)
 {
-
 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
 
-	/* create a temporary filename */
-	sprintf(fname, "%s.%d", fname, getpid());
-
 	TEST_PAUSE;
 
-	if ((fd2 = open("/tmp", O_DIRECTORY)) == -1) {
-		tst_brkm(TBROK, cleanup, "open of fd2 failed");
-	}
+	tst_tmpdir();
 
-	if ((fd3 = open(fname, O_RDWR | O_CREAT, 0666)) == -1) {
-		tst_brkm(TBROK, cleanup, "open of fd3 (temp file) failed");
-	}
+	fd2 = SAFE_OPEN(cleanup, "/tmp", O_DIRECTORY);
 
-	if (write(fd3, "A", 1) != 1) {
-		tst_brkm(TBROK, cleanup, "can't write to fd3");
-	}
-	close(fd3);
-	if ((fd3 = open(fname, O_RDWR | O_CREAT, 0666)) == -1) {
-		tst_brkm(TBROK, cleanup, "open of fd3 (temp file) failed");
+	SAFE_FILE_PRINTF(cleanup, TEST_FILE, "A");
+
+	fd3 = SAFE_OPEN(cleanup, TEST_FILE, O_RDWR | O_CREAT, 0666);
+}
+
+static void read_verify(const struct test_case_t *test)
+{
+	TEST(read(*test->fd, test->buf, 1));
+
+	if (TEST_RETURN != -1) {
+		tst_resm(TFAIL, "call succeeded unexpectedly");
+		return;
 	}
-#if !defined(UCLINUX)
-	bad_addr = mmap(0, 1, PROT_NONE,
-			MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
-	if (bad_addr == MAP_FAILED) {
-		tst_brkm(TBROK, cleanup, "mmap failed");
+
+	TEST_ERROR_LOG(TEST_ERRNO);
+
+	if (TEST_ERRNO == test->exp_error) {
+		tst_resm(TPASS | TTERRNO, "expected failure - errno = %d : %s",
+			 TEST_ERRNO, strerror(TEST_ERRNO));
+	} else {
+		tst_resm(TFAIL | TTERRNO,
+			 "unexpected error - %d : %s - expected %d",
+			 TEST_ERRNO, strerror(TEST_ERRNO), test->exp_error);
 	}
-	TC[2].buf = bad_addr;
-#endif
 }
 
-/*
- * cleanup() - performs all the ONE TIME cleanup for this test at completion
- *	       or premature exit.
- */
-void cleanup(void)
+static void cleanup(void)
 {
-	/*
-	 * print timing status if that option was specified.
-	 * print errno log if that option was specified.
-	 */
 	TEST_CLEANUP;
-	unlink(fname);
 
+	if (fd3 > 0)
+		close(fd3);
+
+	if (fd2 > 0)
+		close(fd2);
+
+	tst_rmdir();
 }
-- 
1.8.4.2




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[LTP] [PATCH] read/read02.c: add new error number tests

[Zeng Linggang]

Add EINVAL errnor nuber tests for read(2):
* The file was opened with the O_DIRECT flag, and the alignment of the user
  buffer was not multiples of the logical block size of the file system,
  expect an EINVAL.

* The file was opened with the O_DIRECT flag, and transfer sizes was not
  multiples of the logical block size of the file system, expect an EINVAL.

Signed-off-by: Zeng Linggang <zenglg.jy@cn.fujitsu.com>
---
 testcases/kernel/syscalls/read/read02.c | 53 ++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 7 deletions(-)

diff --git a/testcases/kernel/syscalls/read/read02.c b/testcases/kernel/syscalls/read/read02.c
index 8aabe93..0e227fe 100644
--- a/testcases/kernel/syscalls/read/read02.c
+++ b/testcases/kernel/syscalls/read/read02.c
@@ -27,6 +27,16 @@
  *
  *	test 3:
  *	Pass buf = -1 as a parmeter to read, expect an EFAULT.
+ *
+ *	test 4:
+ *	The file was opened with the O_DIRECT flag, and the alignment of the
+ *	user buffer was not multiples of the logical block size of the file
+ *	system, expect an EINVAL.
+ *
+ *	test 5:
+ *	The file was opened with the O_DIRECT flag, and transfer sizes was not
+ *	multiples of the logical block size of the file system, expect an
+ *	EINVAL.
  */
 
 #define _GNU_SOURCE
@@ -41,22 +51,30 @@
 #include "safe_macros.h"
 
 #define TEST_FILE	"test_file"
+#define TEST_FILE4	"/root/test_file4"
 
 char *TCID = "read02";
 
 static int badfd = -1;
-static int fd2, fd3;
+static int fd2, fd3, fd4;
 static char buf[BUFSIZ];
-static int exp_enos[] = { EBADF, EISDIR, EFAULT, 0 };
+static void *outside_buf = (void *)-1;
+static void *temp;
+static void *addr4;
+static void *addr5;
+static int exp_enos[] = { EBADF, EISDIR, EFAULT, EINVAL, 0 };
 
 static struct test_case_t {
 	int *fd;
-	void *buf;
+	void **buf;
+	size_t count;
 	int exp_error;
 } TC[] = {
-	{&badfd, buf, EBADF},
-	{&fd2, buf, EISDIR},
-	{&fd3, (void *)-1, EFAULT},
+	{&badfd, (void **)&buf, 1, EBADF},
+	{&fd2, (void **)&buf, 1, EISDIR},
+	{&fd3, &outside_buf, 1, EFAULT},
+	{&fd4, &addr4, 4096, EINVAL},
+	{&fd4, &addr5, 1, EINVAL},
 };
 
 int TST_TOTAL = ARRAY_SIZE(TC);
@@ -89,6 +107,11 @@ int main(int ac, char **av)
 
 static void setup(void)
 {
+	if ((tst_kvercmp(2, 4, 10)) < 0)
+		tst_brkm(TCONF, NULL, "This test needs kernel 2.4.10 or newer");
+
+	tst_require_root(NULL);
+
 	tst_sig(NOFORK, DEF_HANDLER, cleanup);
 
 	TEST_PAUSE;
@@ -100,11 +123,19 @@ static void setup(void)
 	SAFE_FILE_PRINTF(cleanup, TEST_FILE, "A");
 
 	fd3 = SAFE_OPEN(cleanup, TEST_FILE, O_RDWR | O_CREAT, 0666);
+
+	temp = SAFE_MALLOC(cleanup, 4096*10);
+
+	addr4 = (char *)(((long)buf & (~4095)) + 1);
+	addr5 = (char *)((long)buf & (~4095));
+
+	SAFE_FILE_PRINTF(cleanup, TEST_FILE4, "A");
+	fd4 = SAFE_OPEN(cleanup, TEST_FILE4, O_RDWR | O_DIRECT, 0777);
 }
 
 static void read_verify(const struct test_case_t *test)
 {
-	TEST(read(*test->fd, test->buf, 1));
+	TEST(read(*test->fd, *test->buf, test->count));
 
 	if (TEST_RETURN != -1) {
 		tst_resm(TFAIL, "call succeeded unexpectedly");
@@ -127,6 +158,14 @@ static void cleanup(void)
 {
 	TEST_CLEANUP;
 
+	free(temp);
+
+	if (fd4 > 0)
+		close(fd4);
+
+	if (unlink(TEST_FILE4) < 0)
+		tst_resm(TWARN | TERRNO, "unlink(\"%s\") failed", TEST_FILE4);
+
 	if (fd3 > 0)
 		close(fd3);
 
-- 
1.8.4.2




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Re: [LTP] [PATCH] read/read02.c: cleanup

[chrubis]

Hi!
> -#ifndef UCLINUX
> -	    /* Skip since uClinux does not implement memory protection */
> -	    /* the buffer is invalid - EFAULT */
> -	{
> -	&fd3, (void *)-1, EFAULT}
> -#endif
> +	{&badfd, buf, EBADF},
> +	{&fd2, buf, EISDIR},
> +	{&fd3, (void *)-1, EFAULT},
>  };

Removing the ifdefs breaks the testcases on uClinux, please keep them
there.

> -#if !defined(UCLINUX)
> -	bad_addr = mmap(0, 1, PROT_NONE,
> -			MAP_PRIVATE_EXCEPT_UCLINUX | MAP_ANONYMOUS, 0, 0);
> -	if (bad_addr == MAP_FAILED) {
> -		tst_brkm(TBROK, cleanup, "mmap failed");
> +
> +	TEST_ERROR_LOG(TEST_ERRNO);
> +
> +	if (TEST_ERRNO == test->exp_error) {
> +		tst_resm(TPASS | TTERRNO, "expected failure - errno = %d : %s",
> +			 TEST_ERRNO, strerror(TEST_ERRNO));
> +	} else {
> +		tst_resm(TFAIL | TTERRNO,
> +			 "unexpected error - %d : %s - expected %d",
> +			 TEST_ERRNO, strerror(TEST_ERRNO), test->exp_error);
>  	}
> -	TC[2].buf = bad_addr;
> -#endif

And removing the mmap() possibly breaks the testcases on platforms where
there is something mapped on address (void*)-1. Looking at the git log,
this may be case for some 64 bit machines (at least this is what the
patch from 2002 says).

Given that we have quite a lot of testcases that passes addresses that
are expected to generate EFAULT to various syscalls we should unify the
way these are generated.

I would go for creating tst_bad_addr() function that would replace all
the adhoc (and posibly wrong) definitions. I will look into that asap.

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] [PATCH] read/read02.c: add new error number tests

[chrubis]

Hi!
>  static struct test_case_t {
>  	int *fd;
> -	void *buf;
> +	void **buf;
> +	size_t count;
>  	int exp_error;
>  } TC[] = {
> -	{&badfd, buf, EBADF},
> -	{&fd2, buf, EISDIR},
> -	{&fd3, (void *)-1, EFAULT},
> +	{&badfd, (void **)&buf, 1, EBADF},
> +	{&fd2, (void **)&buf, 1, EISDIR},
> +	{&fd3, &outside_buf, 1, EFAULT},
> +	{&fd4, &addr4, 4096, EINVAL},
> +	{&fd4, &addr5, 1, EINVAL},
>  };
>  
>  int TST_TOTAL = ARRAY_SIZE(TC);
> @@ -89,6 +107,11 @@ int main(int ac, char **av)
>  
>  static void setup(void)
>  {
> +	if ((tst_kvercmp(2, 4, 10)) < 0)
> +		tst_brkm(TCONF, NULL, "This test needs kernel 2.4.10 or newer");

Linux 2.4.10 is from 2001 I would say that it's old enough so we can
expect that O_DIRECT is generally available.

> +	tst_require_root(NULL);

Does O_DIRECT require root?
(I haven't found anything in read man page that would suggests so)

>  	tst_sig(NOFORK, DEF_HANDLER, cleanup);
>  
>  	TEST_PAUSE;
> @@ -100,11 +123,19 @@ static void setup(void)
>  	SAFE_FILE_PRINTF(cleanup, TEST_FILE, "A");
>  
>  	fd3 = SAFE_OPEN(cleanup, TEST_FILE, O_RDWR | O_CREAT, 0666);
> +
> +	temp = SAFE_MALLOC(cleanup, 4096*10);
> +
> +	addr4 = (char *)(((long)buf & (~4095)) + 1);
> +	addr5 = (char *)((long)buf & (~4095));

You can allocate aligned buffer with memalign() instead.

> +	SAFE_FILE_PRINTF(cleanup, TEST_FILE4, "A");
> +	fd4 = SAFE_OPEN(cleanup, TEST_FILE4, O_RDWR | O_DIRECT, 0777);
>  }
>  
>  static void read_verify(const struct test_case_t *test)
>  {
> -	TEST(read(*test->fd, test->buf, 1));
> +	TEST(read(*test->fd, *test->buf, test->count));
>  
>  	if (TEST_RETURN != -1) {
>  		tst_resm(TFAIL, "call succeeded unexpectedly");
> @@ -127,6 +158,14 @@ static void cleanup(void)
>  {
>  	TEST_CLEANUP;
>  
> +	free(temp);
> +
> +	if (fd4 > 0)
> +		close(fd4);
> +
> +	if (unlink(TEST_FILE4) < 0)
> +		tst_resm(TWARN | TERRNO, "unlink(\"%s\") failed", TEST_FILE4);

There is no need to unlink files if you call tst_rmdir(). You only need
to close filedescriptors.

>  	if (fd3 > 0)
>  		close(fd3);
>  

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] [PATCH] read/read02.c: add new error number tests

[chrubis]

Hi!
> > > +	tst_require_root(NULL);
> > 
> > Does O_DIRECT require root?
> > (I haven't found anything in read man page that would suggests so)
> > 
> 
> In fedora20, /tmp is tmpfs.
> This test will fail if open a file with O_DIRECT in /tmp, like:
> read02      1  TBROK  :  open failed at read02.c:147: errno=EINVAL(22):
> Invalid argument
> So I test it in /root.

That is wrong way to solve this problem.

> > There is no need to unlink files if you call tst_rmdir(). You only need
> > to close filedescriptors.
> > 
> 
> TEST_FILE4 is not in /tmp.

The test should create all files in a directory created by tst_tmpdir().

We should handle this as:

* Skip the test (TCONF) if temp diretory is tmpfs (does not support O_DIRECT)
  (see include/tst_fs_type.h)

* User should pass alternative temp directory to runltp script to make
  the test working in case /tmp is on tmpfs

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] [PATCH v2 1/3] SAFE_MACROS: Add memalign()

[chrubis]

Hi!
Pushed with added #include <malloc.h> in  lib/safe_macros.c in order to
get memaling() prototype, thanks.

-- 
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Re: [LTP] [PATCH v2 2/3] read/read02.c: cleanup

[chrubis]

Hi!
Pushed, thanks.

-- 
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Re: [LTP] [PATCH v2 3/3] read/read02.c: add new error number tests

[chrubis]

Hi!
Pushed with minor fixups, thanks.

(I've added code to close the fd4 in cleanup and changed the code to use
one file for both fd4 and fd3)

-- 
Cyril Hrubis
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Re: [LTP] [PATCH v2 3/3] read/read02.c: add new error number tests

[chrubis]

Hi!
> +	if (tst_fs_type(cleanup, ".") == TST_TMPFS_MAGIC) {
> +		tst_brkm(TCONF, cleanup,
> +			 "Test not supported on tmpfs filesystem");
> +	}
> +

Giving it second though, we should skip only the O_DIRECT testcases,
right?

Can we create fix that in follow up patch?

-- 
Cyril Hrubis
chrubis@suse.cz

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Re: [LTP] [PATCH] read/read02.c: fix skipping all testes on tmpfs

[chrubis]

Hi!
> We only skip the O_DIRECT testes when on tmpfs.

Pushed with minor changes, thanks.

-- 
Cyril Hrubis
chrubis@suse.cz

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