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* [LTP] [PATCH] mknod01: Rewrite the test using new LTP API
@ 2023-02-22  3:45 Avinesh Kumar
  2023-02-24 15:03 ` Cyril Hrubis
  0 siblings, 1 reply; 7+ messages in thread
From: Avinesh Kumar @ 2023-02-22  3:45 UTC (permalink / raw)
  To: ltp

Signed-off-by: Avinesh Kumar <akumar@suse.de>
---
 testcases/kernel/syscalls/mknod/mknod01.c | 137 ++++++----------------
 1 file changed, 33 insertions(+), 104 deletions(-)

diff --git a/testcases/kernel/syscalls/mknod/mknod01.c b/testcases/kernel/syscalls/mknod/mknod01.c
index f79e5fa42..d4b8c7bf8 100644
--- a/testcases/kernel/syscalls/mknod/mknod01.c
+++ b/testcases/kernel/syscalls/mknod/mknod01.c
@@ -1,123 +1,52 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
- *  AUTHOR		: William Roske
- *  CO-PILOT		: Dave Fenner
- *
- * 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; if not, write the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA  94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
+ *  AUTHOR: William Roske, CO-PILOT: Dave Fenner
+ * Copyright (c) 2023 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
+ */
+
+/*\
+ * [Description]
  *
+ * Verify that mknod(2) successfully creates a filesystem node with
+ * various modes.
  */
 
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/stat.h>
 #include <sys/sysmacros.h>
-
-#include "test.h"
-#include "safe_macros.h"
-
-static void setup(void);
-static void cleanup(void);
-
-char *TCID = "mknod01";
+#include "tst_test.h"
 
 #define PATH "test_node"
 
-int tcases[] = {		/* modes to give nodes created (1 per text case) */
-	S_IFREG | 0777,		/* ordinary file with mode 0777 */
-	S_IFIFO | 0777,		/* fifo special with mode 0777 */
-	S_IFCHR | 0777,		/* character special with mode 0777 */
-	S_IFBLK | 0777,		/* block special with mode 0777 */
+static int tcases[] = {
+	S_IFREG | 0777,
+	S_IFIFO | 0777,
+	S_IFCHR | 0777,
+	S_IFBLK | 0777,
 
-	S_IFREG | 04700,	/* ordinary file with mode 04700 (suid) */
-	S_IFREG | 02700,	/* ordinary file with mode 02700 (sgid) */
-	S_IFREG | 06700,	/* ordinary file with mode 06700 (sgid & suid) */
+	S_IFREG | 04700,
+	S_IFREG | 02700,
+	S_IFREG | 06700,
 };
 
-int TST_TOTAL = ARRAY_SIZE(tcases);
 
-int main(int ac, char **av)
+static void run(unsigned int i)
 {
-	int lc, i;
 	dev_t dev;
 
-	tst_parse_opts(ac, av, NULL, NULL);
-
-	setup();
+	if (S_ISCHR(tcases[i]))
+		dev = makedev(1, 3);
+	else
+		dev = 0;
 
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
-
-		for (i = 0; i < TST_TOTAL; i++) {
-			/*
-			 * overlayfs doesn't support mknod char device with
-			 * major 0 and minor 0, which is known as whiteout_dev
-			 */
-			if (S_ISCHR(tcases[i]))
-				dev = makedev(1, 3);
-			else
-				dev = 0;
-			TEST(mknod(PATH, tcases[i], dev));
-
-			if (TEST_RETURN == -1) {
-				tst_resm(TFAIL,
-					 "mknod(%s, %#o, %lu) failed, errno=%d : %s",
-					 PATH, tcases[i], dev, TEST_ERRNO,
-					 strerror(TEST_ERRNO));
-			} else {
-				tst_resm(TPASS,
-					 "mknod(%s, %#o, %lu) returned %ld",
-					 PATH, tcases[i], dev, TEST_RETURN);
-			}
-
-			SAFE_UNLINK(cleanup, PATH);
-		}
-
-	}
-
-	cleanup();
-	tst_exit();
+	TST_EXP_PASS(mknod(PATH, tcases[i], dev),
+				"mknod(PATH, %o, %ld)",
+				tcases[i], dev);
+	SAFE_UNLINK(PATH);
 }
 
-void setup(void)
-{
-	tst_require_root();
-	tst_sig(NOFORK, DEF_HANDLER, cleanup);
-
-	TEST_PAUSE;
-
-	tst_tmpdir();
-}
-
-void cleanup(void)
-{
-	tst_rmdir();
-}
+static struct tst_test test = {
+	.test = run,
+	.tcnt = ARRAY_SIZE(tcases),
+	.needs_root = 1,
+	.needs_tmpdir = 1
+};
-- 
2.39.1


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Mailing list info: https://lists.linux.it/listinfo/ltp

^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [LTP] [PATCH] mknod01: Rewrite the test using new LTP API
  2023-02-22  3:45 [LTP] [PATCH] mknod01: Rewrite the test using new LTP API Avinesh Kumar
@ 2023-02-24 15:03 ` Cyril Hrubis
  2023-02-28 15:30   ` Avinesh Kumar
  2023-02-28 15:42   ` [LTP] [PATCH v2 1/1] " Avinesh Kumar
  0 siblings, 2 replies; 7+ messages in thread
From: Cyril Hrubis @ 2023-02-24 15:03 UTC (permalink / raw)
  To: Avinesh Kumar; +Cc: ltp

Hi!
> +	if (S_ISCHR(tcases[i]))
> +		dev = makedev(1, 3);
> +	else
> +		dev = 0;

Reading 'man 2 mknod' I suppose that we should pass non-zero dev for
block devices as well. Hoever the test seems to work fine with zero dev
for both cases.

Btw makedev(1, 3) seems to be the /dev/null char device and it should
work for block devices since block makedev(1, 3) would be /dev/ram3, so
what about:

diff --git a/testcases/kernel/syscalls/mknod/mknod01.c b/testcases/kernel/syscalls/mknod/mknod01.c
index d4b8c7bf8..7a4d5b43f 100644
--- a/testcases/kernel/syscalls/mknod/mknod01.c
+++ b/testcases/kernel/syscalls/mknod/mknod01.c
@@ -31,12 +31,10 @@ static int tcases[] = {

 static void run(unsigned int i)
 {
-       dev_t dev;
+       dev_t dev = 0;

-       if (S_ISCHR(tcases[i]))
+       if (S_ISCHR(tcases[i]) || S_ISBLK(tcases[i]))
                dev = makedev(1, 3);
-       else
-               dev = 0;

        TST_EXP_PASS(mknod(PATH, tcases[i], dev),
                                "mknod(PATH, %o, %ld)",


-- 
Cyril Hrubis
chrubis@suse.cz

-- 
Mailing list info: https://lists.linux.it/listinfo/ltp

^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [LTP] [PATCH] mknod01: Rewrite the test using new LTP API
  2023-02-24 15:03 ` Cyril Hrubis
@ 2023-02-28 15:30   ` Avinesh Kumar
  2023-03-01 15:43     ` Cyril Hrubis
  2023-02-28 15:42   ` [LTP] [PATCH v2 1/1] " Avinesh Kumar
  1 sibling, 1 reply; 7+ messages in thread
From: Avinesh Kumar @ 2023-02-28 15:30 UTC (permalink / raw)
  To: Cyril Hrubis; +Cc: ltp

Hi Cyril,

On Friday, February 24, 2023 8:33:34 PM IST Cyril Hrubis wrote:
> Hi!
> > +	if (S_ISCHR(tcases[i]))
> > +		dev = makedev(1, 3);
> > +	else
> > +		dev = 0;
> 
> Reading 'man 2 mknod' I suppose that we should pass non-zero dev for
> block devices as well. Hoever the test seems to work fine with zero dev
> for both cases.
> 
> Btw makedev(1, 3) seems to be the /dev/null char device and it should
> work for block devices since block makedev(1, 3) would be /dev/ram3, so
> what about:
Thank you for the review and yes I overlooked block devices scenario, your suggested
patch looks good, should I send this as v2 or will you merge with these changes?

> 
> diff --git a/testcases/kernel/syscalls/mknod/mknod01.c b/testcases/kernel/syscalls/mknod/mknod01.c
> index d4b8c7bf8..7a4d5b43f 100644
> --- a/testcases/kernel/syscalls/mknod/mknod01.c
> +++ b/testcases/kernel/syscalls/mknod/mknod01.c
> @@ -31,12 +31,10 @@ static int tcases[] = {
> 
>  static void run(unsigned int i)
>  {
> -       dev_t dev;
> +       dev_t dev = 0;
> 
> -       if (S_ISCHR(tcases[i]))
> +       if (S_ISCHR(tcases[i]) || S_ISBLK(tcases[i]))
>                 dev = makedev(1, 3);
> -       else
> -               dev = 0;
> 
>         TST_EXP_PASS(mknod(PATH, tcases[i], dev),
>                                 "mknod(PATH, %o, %ld)",
> 
> 
> 

Regards,
Avinesh





-- 
Mailing list info: https://lists.linux.it/listinfo/ltp

^ permalink raw reply	[flat|nested] 7+ messages in thread

* [LTP] [PATCH v2 1/1] mknod01: Rewrite the test using new LTP API
  2023-02-24 15:03 ` Cyril Hrubis
  2023-02-28 15:30   ` Avinesh Kumar
@ 2023-02-28 15:42   ` Avinesh Kumar
  2023-03-01  1:50     ` Li Wang
  2023-03-02 20:04     ` Cyril Hrubis
  1 sibling, 2 replies; 7+ messages in thread
From: Avinesh Kumar @ 2023-02-28 15:42 UTC (permalink / raw)
  To: ltp

Signed-off-by: Avinesh Kumar <akumar@suse.de>
---
 testcases/kernel/syscalls/mknod/mknod01.c | 137 +++-------
 testcases/kernel/syscalls/mknod/mknod02.c | 312 +++-------------------
 2 files changed, 76 insertions(+), 373 deletions(-)

diff --git a/testcases/kernel/syscalls/mknod/mknod01.c b/testcases/kernel/syscalls/mknod/mknod01.c
index f79e5fa42..7a4d5b43f 100644
--- a/testcases/kernel/syscalls/mknod/mknod01.c
+++ b/testcases/kernel/syscalls/mknod/mknod01.c
@@ -1,123 +1,50 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (c) 2000 Silicon Graphics, Inc.  All Rights Reserved.
- *  AUTHOR		: William Roske
- *  CO-PILOT		: Dave Fenner
- *
- * 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; if not, write the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA  94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/NoticeExplan/
+ *  AUTHOR: William Roske, CO-PILOT: Dave Fenner
+ * Copyright (c) 2023 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
+ */
+
+/*\
+ * [Description]
  *
+ * Verify that mknod(2) successfully creates a filesystem node with
+ * various modes.
  */
 
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
-#include <sys/types.h>
-#include <sys/stat.h>
 #include <sys/sysmacros.h>
-
-#include "test.h"
-#include "safe_macros.h"
-
-static void setup(void);
-static void cleanup(void);
-
-char *TCID = "mknod01";
+#include "tst_test.h"
 
 #define PATH "test_node"
 
-int tcases[] = {		/* modes to give nodes created (1 per text case) */
-	S_IFREG | 0777,		/* ordinary file with mode 0777 */
-	S_IFIFO | 0777,		/* fifo special with mode 0777 */
-	S_IFCHR | 0777,		/* character special with mode 0777 */
-	S_IFBLK | 0777,		/* block special with mode 0777 */
+static int tcases[] = {
+	S_IFREG | 0777,
+	S_IFIFO | 0777,
+	S_IFCHR | 0777,
+	S_IFBLK | 0777,
 
-	S_IFREG | 04700,	/* ordinary file with mode 04700 (suid) */
-	S_IFREG | 02700,	/* ordinary file with mode 02700 (sgid) */
-	S_IFREG | 06700,	/* ordinary file with mode 06700 (sgid & suid) */
+	S_IFREG | 04700,
+	S_IFREG | 02700,
+	S_IFREG | 06700,
 };
 
-int TST_TOTAL = ARRAY_SIZE(tcases);
 
-int main(int ac, char **av)
+static void run(unsigned int i)
 {
-	int lc, i;
-	dev_t dev;
-
-	tst_parse_opts(ac, av, NULL, NULL);
+	dev_t dev = 0;
 
-	setup();
+	if (S_ISCHR(tcases[i]) || S_ISBLK(tcases[i]))
+		dev = makedev(1, 3);
 
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-		tst_count = 0;
-
-		for (i = 0; i < TST_TOTAL; i++) {
-			/*
-			 * overlayfs doesn't support mknod char device with
-			 * major 0 and minor 0, which is known as whiteout_dev
-			 */
-			if (S_ISCHR(tcases[i]))
-				dev = makedev(1, 3);
-			else
-				dev = 0;
-			TEST(mknod(PATH, tcases[i], dev));
-
-			if (TEST_RETURN == -1) {
-				tst_resm(TFAIL,
-					 "mknod(%s, %#o, %lu) failed, errno=%d : %s",
-					 PATH, tcases[i], dev, TEST_ERRNO,
-					 strerror(TEST_ERRNO));
-			} else {
-				tst_resm(TPASS,
-					 "mknod(%s, %#o, %lu) returned %ld",
-					 PATH, tcases[i], dev, TEST_RETURN);
-			}
-
-			SAFE_UNLINK(cleanup, PATH);
-		}
-
-	}
-
-	cleanup();
-	tst_exit();
+	TST_EXP_PASS(mknod(PATH, tcases[i], dev),
+				"mknod(PATH, %o, %ld)",
+				tcases[i], dev);
+	SAFE_UNLINK(PATH);
 }
 
-void setup(void)
-{
-	tst_require_root();
-	tst_sig(NOFORK, DEF_HANDLER, cleanup);
-
-	TEST_PAUSE;
-
-	tst_tmpdir();
-}
-
-void cleanup(void)
-{
-	tst_rmdir();
-}
+static struct tst_test test = {
+	.test = run,
+	.tcnt = ARRAY_SIZE(tcases),
+	.needs_root = 1,
+	.needs_tmpdir = 1
+};
diff --git a/testcases/kernel/syscalls/mknod/mknod02.c b/testcases/kernel/syscalls/mknod/mknod02.c
index 594473e24..af63ad377 100644
--- a/testcases/kernel/syscalls/mknod/mknod02.c
+++ b/testcases/kernel/syscalls/mknod/mknod02.c
@@ -1,301 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
- *
  *   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 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
+ *     07/2001 Ported by Wayne Boyer
+ *   Copyright (c) 2023 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
  */
 
-/*
- * Test Name: mknod02
+/*\
+ * [Description]
  *
- * Test Description:
  *  Verify that mknod(2) succeeds when used to create a filesystem
  *  node with set group-ID bit set on a directory without set group-ID bit set.
  *  The node created should have set group-ID bit set and its gid should be
  *  equal to that of its parent directory.
- *
- * Expected Result:
- *  mknod() should return value 0 on success and node created should have
- *  set group-ID bit set, its gid should be equal to that of its parent
- *  directory.
- *
- * Algorithm:
- *  Setup:
- *   Setup signal handling.
- *   Create temporary directory.
- *   Pause for SIGUSR1 if option specified.
- *
- *  Test:
- *   Loop if the proper options are given.
- *   Execute system call
- *   Check return code, if system call failed (return=-1)
- *	Log the errno and Issue a FAIL message.
- *   Otherwise,
- *	Verify the Functionality of system call
- *      if successful,
- *		Issue Functionality-Pass message.
- *      Otherwise,
- *		Issue Functionality-Fail message.
- *  Cleanup:
- *   Print errno log and/or timing stats if options given
- *   Delete the temporary directory created.
- *
- * Usage:  <for command-line>
- *  mknod02 [-c n] [-f] [-i n] [-I x] [-P x] [-t]
- *     where,  -c n : Run n copies concurrently.
- *             -f   : Turn off functionality Testing.
- *	       -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:
- *  This test should be run by 'super-user' (root) only.
- *
  */
 
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <errno.h>
-#include <string.h>
-#include <signal.h>
 #include <pwd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#include "test.h"
-#include "safe_macros.h"
-
-#define LTPUSER		"nobody"
-#define MODE_RWX	S_IFIFO | S_IRWXU | S_IRWXG | S_IRWXO
-#define MODE_SGID       S_IFIFO | S_ISGID | S_IRWXU | S_IRWXG | S_IRWXO
-#define DIR_TEMP	"testdir_2"
-#define TNODE		"tnode_%d"
+#include "tst_test.h"
 
-struct stat buf;		/* struct. to hold stat(2) o/p contents */
-struct passwd *user1;		/* struct. to hold getpwnam(3) o/p contents */
+#define MODE1	0010777		/* FIFO */
+#define MODE2	0012777		/* FIFO with Set group ID */
+#define DIR_TEMP	"testdir"
+#define TEMP_NODE	"node1"
 
-char *TCID = "mknod02";
-int TST_TOTAL = 1;
-char node_name[PATH_MAX];	/* buffer to hold node name created */
+static struct stat buf;
+static struct passwd *user_nobody;
 
-gid_t group1_gid, group2_gid, mygid;	/* user and process group id's */
-uid_t save_myuid, user1_uid;	/* user and process user id's */
-pid_t mypid;			/* process id */
+static gid_t gid_nobody, egid_process, rgid_process;
+static uid_t ruid_process, uid_nobody;
 
-void setup();			/* setup function for the test */
-void cleanup();			/* cleanup function for the test */
 
-int main(int ac, char **av)
+static void setup(void)
 {
-	int lc;
-	int fflag;
-
-	tst_parse_opts(ac, av, NULL, NULL);
-
-	setup();
-
-	for (lc = 0; TEST_LOOPING(lc); lc++) {
-
-		tst_count = 0;
-
-		/*
-		 *  Attempt to create a filesystem node with group-id bit set
-		 *  on a directory without group id bit set such that,
-		 *  the node created by mknod(2) should have group-id (sgid)
-		 *  bit set and node's gid should be equal to that of its
-		 *  parent directory.
-		 */
-		TEST(mknod(node_name, MODE_SGID, 0));
-
-		/* Check return code from mknod(2) */
-		if (TEST_RETURN == -1) {
-			tst_resm(TFAIL,
-				 "mknod(%s, %#o, 0)  failed, errno=%d : %s",
-				 node_name, MODE_SGID, TEST_ERRNO,
-				 strerror(TEST_ERRNO));
-			continue;
-		}
-		/* Set the functionality flag */
-		fflag = 1;
-
-		/* Check for node's creation */
-		if (stat(node_name, &buf) < 0) {
-			tst_resm(TFAIL, "stat() of %s failed, errno:%d",
-				 node_name, TEST_ERRNO);
-
-			/* unset functionality flag */
-			fflag = 0;
-		}
+	SAFE_CHMOD(".", 0711);
 
-		/* Verify mode permissions of node */
-		if (!(buf.st_mode & S_ISGID)) {
-			tst_resm(TFAIL, "%s: Incorrect modes, setgid "
-				 "bit not set", node_name);
-			/* unset flag as functionality fails */
-			fflag = 0;
-		}
+	ruid_process = getuid();
+	user_nobody = SAFE_GETPWNAM("nobody");
+	uid_nobody = user_nobody->pw_uid;
+	gid_nobody = user_nobody->pw_gid;
 
-		/* Verify group ID of node */
-		if (buf.st_gid != mygid) {
-			tst_resm(TFAIL, "%s: Incorrect group",
-				 node_name);
-			/* unset flag as functionality fails */
-			fflag = 0;
-		}
-		if (fflag) {
-			tst_resm(TPASS, "Functionality of mknod(%s, "
-				 "%#o, 0) successful",
-				 node_name, MODE_SGID);
-		}
+	egid_process = getegid();
 
-		/* Remove the node for the next go `round */
-		if (unlink(node_name) == -1) {
-			tst_resm(TWARN, "unlink(%s) failed, errno:%d %s",
-				 node_name, errno, strerror(errno));
-		}
-	}
+	SAFE_MKDIR(DIR_TEMP, MODE1);
+	SAFE_CHOWN(DIR_TEMP, uid_nobody, egid_process);
 
-	/* Change the directory back to temporary directory */
-	SAFE_CHDIR(cleanup, "..");
+	SAFE_SETGID(gid_nobody);
+	SAFE_SETREUID(-1, uid_nobody);
 
-	/*
-	 * Invoke cleanup() to delete the test directories created
-	 * in the setup() and exit main().
-	 */
-	cleanup();
-
-	tst_exit();
+	rgid_process = getgid();
 }
 
-/*
- * setup(void) - performs all ONE TIME setup for this test.
- *	Exit the test program on receipt of unexpected signals.
- *	Create a temporary directory used to hold test directories created
- *	and change the directory to it.
- *	Verify that pid of process executing the test is root.
- *	Create a test directory on temporary directory and set the ownership
- *	of test directory to ltp user and process.
- *	Set the effective uid/gid of the process to that of ltp user.
- */
-void setup(void)
+static void run(void)
 {
-	tst_require_root();
-
-	/* Capture unexpected signals */
-	tst_sig(NOFORK, DEF_HANDLER, cleanup);
-
-	TEST_PAUSE;
-
-	/* Make a temp dir and cd to it */
-	tst_tmpdir();
-
-	/* fix permissions on the tmpdir */
-	if (chmod(".", 0711) != 0) {
-		tst_brkm(TBROK, cleanup, "chmod() failed");
-	}
-
-	/* Save the real user id of the current test process */
-	save_myuid = getuid();
-
-	/* Save the process id of the current test process */
-	mypid = getpid();
-
-	/* Get the node name to be created in the test */
-	sprintf(node_name, TNODE, mypid);
-
-	/* Get the uid/gid of ltpuser */
-	if ((user1 = getpwnam(LTPUSER)) == NULL) {
-		tst_brkm(TBROK | TERRNO, cleanup,
-			 "Couldn't determine if %s was in /etc/passwd",
-			 LTPUSER);
-	}
-	user1_uid = user1->pw_uid;
-	group1_gid = user1->pw_gid;
+	SAFE_CHDIR(DIR_TEMP);
+	TST_EXP_PASS(mknod(TEMP_NODE, MODE2, 0), "mknod(%s, %o, 0)", TEMP_NODE, MODE2);
 
-	/* Get the effective group id of the test process */
-	group2_gid = getegid();
+	TST_EXP_PASS_SILENT(stat(TEMP_NODE, &buf));
 
-	/*
-	 * Create a test directory under temporary directory with the
-	 * specified mode permissions, with uid/gid set to that of guest
-	 * user and the test process.
-	 */
-	SAFE_MKDIR(cleanup, DIR_TEMP, MODE_RWX);
-	SAFE_CHOWN(cleanup, DIR_TEMP, user1_uid, group2_gid);
+	TST_EXP_EQ_LI(buf.st_mode & S_ISGID, S_ISGID);
+	TST_EXP_EQ_LI(buf.st_gid, rgid_process);
 
-	/*
-	 * Verify that test directory created with expected permission modes
-	 * and ownerships.
-	 */
-	SAFE_STAT(cleanup, DIR_TEMP, &buf);
-
-	/* Verify modes of test directory */
-	if (buf.st_mode & S_ISGID) {
-		tst_brkm(TBROK, cleanup,
-			 "%s: Incorrect modes, setgid bit set", DIR_TEMP);
-	}
-
-	/* Verify group ID of test directory */
-	if (buf.st_gid != group2_gid) {
-		tst_brkm(TBROK, cleanup, "%s: Incorrect group", DIR_TEMP);
-	}
-
-	/*
-	 * Set the effective group id and user id of the test process
-	 * to that of guest user.
-	 */
-	SAFE_SETGID(cleanup, group1_gid);
-	if (setreuid(-1, user1_uid) < 0) {
-		tst_brkm(TBROK, cleanup,
-			 "Unable to set process uid to that of ltp user");
-	}
-
-	/* Save the real group ID of the current process */
-	mygid = getgid();
-
-	/* Change directory to DIR_TEMP */
-	SAFE_CHDIR(cleanup, DIR_TEMP);
+	SAFE_UNLINK(TEMP_NODE);
+	SAFE_CHDIR("..");
 }
 
-/*
- * cleanup() - Performs all ONE TIME cleanup for this test at
- *             completion or premature exit.
- *	Print test timing stats and errno log if test executed with options.
- *	Restore the real/effective user id of the process changed during
- *	setup().
- *	Remove temporary directory and sub-directories/files under it
- *	created during setup().
- *	Exit the test program with normal exit code.
- */
-void cleanup(void)
+static void cleanup(void)
 {
-
-	/*
-	 * Restore the effective uid of the process changed in the
-	 * setup().
-	 */
-	if (setreuid(-1, save_myuid) < 0) {
-		tst_brkm(TBROK, NULL,
-			 "resetting process real/effective uid failed");
-	}
-
-	tst_rmdir();
-
+	SAFE_SETREUID(-1, ruid_process);
 }
+
+static struct tst_test test = {
+	.setup = setup,
+	.cleanup = cleanup,
+	.test_all = run,
+	.needs_tmpdir = 1,
+	.needs_root = 1
+};
-- 
2.39.2


-- 
Mailing list info: https://lists.linux.it/listinfo/ltp

^ permalink raw reply related	[flat|nested] 7+ messages in thread

* Re: [LTP] [PATCH v2 1/1] mknod01: Rewrite the test using new LTP API
  2023-02-28 15:42   ` [LTP] [PATCH v2 1/1] " Avinesh Kumar
@ 2023-03-01  1:50     ` Li Wang
  2023-03-02 20:04     ` Cyril Hrubis
  1 sibling, 0 replies; 7+ messages in thread
From: Li Wang @ 2023-03-01  1:50 UTC (permalink / raw)
  To: Avinesh Kumar; +Cc: ltp

Looks good:

Reviewed-by: Li Wang <liwang@redhat.com>

-- 
Regards,
Li Wang

-- 
Mailing list info: https://lists.linux.it/listinfo/ltp

^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [LTP] [PATCH] mknod01: Rewrite the test using new LTP API
  2023-02-28 15:30   ` Avinesh Kumar
@ 2023-03-01 15:43     ` Cyril Hrubis
  0 siblings, 0 replies; 7+ messages in thread
From: Cyril Hrubis @ 2023-03-01 15:43 UTC (permalink / raw)
  To: Avinesh Kumar; +Cc: ltp

Hi!
Pushed with the proposed change applied on the top, thanks.

-- 
Cyril Hrubis
chrubis@suse.cz

-- 
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^ permalink raw reply	[flat|nested] 7+ messages in thread

* Re: [LTP] [PATCH v2 1/1] mknod01: Rewrite the test using new LTP API
  2023-02-28 15:42   ` [LTP] [PATCH v2 1/1] " Avinesh Kumar
  2023-03-01  1:50     ` Li Wang
@ 2023-03-02 20:04     ` Cyril Hrubis
  1 sibling, 0 replies; 7+ messages in thread
From: Cyril Hrubis @ 2023-03-02 20:04 UTC (permalink / raw)
  To: Avinesh Kumar; +Cc: ltp

Hi!
> --- a/testcases/kernel/syscalls/mknod/mknod02.c
> +++ b/testcases/kernel/syscalls/mknod/mknod02.c
> @@ -1,301 +1,77 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
>  /*
> - *
>   *   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 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
> + *     07/2001 Ported by Wayne Boyer
> + *   Copyright (c) 2023 SUSE LLC Avinesh Kumar <avinesh.kumar@suse.com>
>   */
>  
> -/*
> - * Test Name: mknod02
> +/*\
> + * [Description]
>   *
> - * Test Description:
>   *  Verify that mknod(2) succeeds when used to create a filesystem
>   *  node with set group-ID bit set on a directory without set group-ID bit set.
>   *  The node created should have set group-ID bit set and its gid should be
>   *  equal to that of its parent directory.

I've read this a few times and I stil do not understand what exactly is
this test supposed to test or at least the code does not correspond to
the description.

I did look at the kernel sources for a while and as far as I can tell
the whole S_ISGID handling is done in the inode_init_owner() function:

void inode_init_owner(struct user_namespace *mnt_userns, struct inode *inode,
                      const struct inode *dir, umode_t mode)
{
        inode_fsuid_set(inode, mnt_userns);
        if (dir && dir->i_mode & S_ISGID) {
                inode->i_gid = dir->i_gid;

                /* Directories are special, and always inherit S_ISGID */
                if (S_ISDIR(mode))
                        mode |= S_ISGID;
        } else
                inode_fsgid_set(inode, mnt_userns);
        inode->i_mode = mode;
}
EXPORT_SYMBOL(inode_init_owner);

Which looks pretty straightforward.

- If the parent direcotry has S_ISGID we set the inode GID to the
  parent directory gid
- If not we call the inode_fsgid_set(), which does namepsace mappings,
  but eventually we end up whaterver the current running process GID
  maps to

So the test is awfully complex for what it's supposed to do, which is
without S_ISGID on parent directory the FIFO gid is set to the running
process GID. As far as I can tell all that needs to be done here is:

With .require_root:

1. Create a directory and set the directory GID to nobody
2. Create a FIFO inside the directory and check that the
   FIFO GID matches the root gid

And that should be it. As far as I can tell the S_ISGID on FIFO is
pointless in this case since for files the S_ISGID means that the GID is
changed when they are executed, which we do not attempt here and I'm not
even sure if we can execute FIFO.

And the same should be done by the mknod03 with the difference that th
S_ISGID should be set on the directory and we should expect the GID to
be inherited.

-- 
Cyril Hrubis
chrubis@suse.cz

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^ permalink raw reply	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2023-03-02 20:03 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-02-22  3:45 [LTP] [PATCH] mknod01: Rewrite the test using new LTP API Avinesh Kumar
2023-02-24 15:03 ` Cyril Hrubis
2023-02-28 15:30   ` Avinesh Kumar
2023-03-01 15:43     ` Cyril Hrubis
2023-02-28 15:42   ` [LTP] [PATCH v2 1/1] " Avinesh Kumar
2023-03-01  1:50     ` Li Wang
2023-03-02 20:04     ` Cyril Hrubis

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