testcases/kernel/syscalls/fanotify/fanotify03.c - platform/external/ltp - Gitiles

 /*
  * Copyright (c) 2013 SUSE.  All Rights Reserved.
  *
  * 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.
  *
  * Started by Jan Kara <jack@suse.cz>
  *
  * DESCRIPTION
  *     Check that fanotify permission events work
  */
 #include "config.h"

 #include <stdio.h>
 #include <unistd.h>
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <sys/fcntl.h>
 #include <sys/wait.h>
 #include <errno.h>
 #include <string.h>
 #include <signal.h>
 #include <sys/syscall.h>
 #include "test.h"
 #include "linux_syscall_numbers.h"
 #include "fanotify.h"
 #include "safe_macros.h"

 char *TCID = "fanotify03";
 int TST_TOTAL = 3;

 #if defined(HAVE_SYS_FANOTIFY_H)
 #include <sys/fanotify.h>

 #define EVENT_MAX 1024
 /* size of the event structure, not counting name */
 #define EVENT_SIZE  (sizeof (struct fanotify_event_metadata))
 /* reasonable guess as to size of 1024 events */
 #define EVENT_BUF_LEN        (EVENT_MAX * EVENT_SIZE)

 static void setup(void);
 static void cleanup(void);

 #define BUF_SIZE 256
 static char fname[BUF_SIZE];
 static char buf[BUF_SIZE];
 static volatile int fd_notify;

 static pid_t child_pid;

 static unsigned long long event_set[EVENT_MAX];
 static unsigned int event_resp[EVENT_MAX];

 static char event_buf[EVENT_BUF_LEN];

 static void generate_events(void)
 {
 	int fd;

 	/*
 	 * generate sequence of events
 	 */
 	if ((fd = open(fname, O_RDWR | O_CREAT, 0700)) == -1)
 		exit(1);
 	if (write(fd, fname, 1) == -1)
 		exit(2);

 	lseek(fd, 0, SEEK_SET);
 	if (read(fd, buf, BUF_SIZE) != -1)
 		exit(3);

 	if (close(fd) == -1)
 		exit(4);
 }

 static void child_handler(int tmp)
 {
 	/*
 	 * Close notification fd so that we cannot block while reading
 	 * from it
 	 */
 	close(fd_notify);
 	fd_notify = -1;
 }

 static void run_child(void)
 {
 	struct sigaction child_action;

 	child_action.sa_handler = child_handler;
 	sigemptyset(&child_action.sa_mask);
 	child_action.sa_flags = SA_NOCLDSTOP;

 	if (sigaction(SIGCHLD, &child_action, NULL) < 0) {
 		tst_brkm(TBROK | TERRNO, cleanup,
 			 "sigaction(SIGCHLD, &child_action, NULL) failed");
 	}

 	switch (child_pid = fork()) {
 	case 0:
 		/* Child will generate events now */
 		close(fd_notify);
 		generate_events();
 		exit(0);
 	case -1:
 		tst_brkm(TBROK | TERRNO, cleanup, "fork() failed");
 	}
 }

 static void check_child(void)
 {
 	struct sigaction child_action;
 	int child_ret;

 	child_action.sa_handler = SIG_IGN;
 	sigemptyset(&child_action.sa_mask);
 	child_action.sa_flags = SA_NOCLDSTOP;
 	if (sigaction(SIGCHLD, &child_action, NULL) < 0) {
 		tst_brkm(TBROK | TERRNO, cleanup,
 			 "sigaction(SIGCHLD, &child_action, NULL) failed");
 	}
 	if (waitpid(-1, &child_ret, 0) < 0) {
 		tst_brkm(TBROK | TERRNO, cleanup,
 				 "waitpid(-1, &child_ret, 0) failed");
 	}

 	if (WIFSIGNALED(child_ret)) {
 		tst_resm(TFAIL, "child exited due to signal %d",
 			 WTERMSIG(child_ret));
 	} else if (WIFEXITED(child_ret)) {
 		if (WEXITSTATUS(child_ret) == 0)
 			tst_resm(TPASS, "child exited correctly");
 		else
 			tst_resm(TFAIL, "child exited with status %d",
 				 WEXITSTATUS(child_ret));
 	} else {
 		tst_resm(TFAIL, "child exited for unknown reason (status %d)",
 			 child_ret);
 	}
 }

 int main(int ac, char **av)
 {
 	int lc;
 	const char *msg;
 	int fd_notify_backup = -1;

 	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
 		tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);

 	setup();

 	for (lc = 0; TEST_LOOPING(lc); lc++) {
 		int ret, len = 0, i = 0, test_num = 0;

 		if (fd_notify_backup == -1) {
 			fd_notify_backup = dup(fd_notify);
 			if (fd_notify_backup < 0)
 				tst_brkm(TBROK | TERRNO, cleanup,
 					 "dup(%d) failed", fd_notify);
 		}
 		run_child();

 		tst_count = 0;

 		event_set[tst_count] = FAN_OPEN_PERM;
 		event_resp[tst_count++] = FAN_ALLOW;
 		event_set[tst_count] = FAN_ACCESS_PERM;
 		event_resp[tst_count++] = FAN_DENY;

 		/* tst_count + 1 is for checking child return value */
 		if (TST_TOTAL != tst_count + 1) {
 			tst_brkm(TBROK, cleanup,
 				 "TST_TOTAL and tst_count do not match");
 		}
 		tst_count = 0;

 		/*
 		 * check events
 		 */
 		while (test_num < TST_TOTAL && fd_notify != -1) {
 			struct fanotify_event_metadata *event;

 			if (i == len) {
 				/* Get more events */
 				ret = read(fd_notify, event_buf + len,
 					   EVENT_BUF_LEN - len);
 				if (fd_notify == -1)
 					break;
 				if (ret < 0) {
 					tst_brkm(TBROK, cleanup,
 						 "read(%d, buf, %zu) failed",
 						 fd_notify, EVENT_BUF_LEN);
 				}
 				len += ret;
 			}

 			event = (struct fanotify_event_metadata *)&event_buf[i];
 			if (!(event->mask & event_set[test_num])) {
 				tst_resm(TFAIL,
 					 "get event: mask=%llx (expected %llx) "
 					 "pid=%u fd=%u",
 					 (unsigned long long)event->mask,
 					 event_set[test_num],
 					 (unsigned)event->pid, event->fd);
 			} else if (event->pid != child_pid) {
 				tst_resm(TFAIL,
 					 "get event: mask=%llx pid=%u "
 					 "(expected %u) fd=%u",
 					 (unsigned long long)event->mask,
 					 (unsigned)event->pid,
 					 (unsigned)child_pid,
 					 event->fd);
 			} else {
 				tst_resm(TPASS,
 					    "get event: mask=%llx pid=%u fd=%u",
 					    (unsigned long long)event->mask,
 					    (unsigned)event->pid, event->fd);
 			}
 			/* Write response to permission event */
 			if (event_set[test_num] & FAN_ALL_PERM_EVENTS) {
 				struct fanotify_response resp;

 				resp.fd = event->fd;
 				resp.response = event_resp[test_num];
 				SAFE_WRITE(cleanup, 1, fd_notify, &resp,
 					   sizeof(resp));
 			}
 			event->mask &= ~event_set[test_num];
 			/* No events left in current mask? Go for next event */
 			if (event->mask == 0) {
 				i += event->event_len;
 				close(event->fd);
 			}
 			test_num++;
 		}
 		for (; test_num < TST_TOTAL - 1; test_num++) {
 			tst_resm(TFAIL, "didn't get event: mask=%llx",
 				 event_set[test_num]);

 		}
 		check_child();
 		/* We got SIGCHLD while running, resetup fd_notify */
 		if (fd_notify == -1) {
 			fd_notify = fd_notify_backup;
 			fd_notify_backup = -1;
 		}
 	}

 	cleanup();
 	tst_exit();
 }

 static void setup(void)
 {
 	int fd;

 	tst_sig(FORK, DEF_HANDLER, cleanup);

 	TEST_PAUSE;

 	tst_tmpdir();
 	sprintf(fname, "fname_%d", getpid());
 	fd = SAFE_OPEN(cleanup, fname, O_CREAT | O_RDWR, 0644);
 	SAFE_WRITE(cleanup, 1, fd, fname, 1);
 	SAFE_CLOSE(cleanup, fd);

 	if ((fd_notify = fanotify_init(FAN_CLASS_CONTENT, O_RDONLY)) < 0) {
 		if (errno == ENOSYS) {
 			tst_brkm(TCONF, cleanup,
 				 "fanotify is not configured in this kernel.");
 		} else {
 			tst_brkm(TBROK | TERRNO, cleanup,
 				 "fanotify_init failed");
 		}
 	}

 	if (fanotify_mark(fd_notify, FAN_MARK_ADD, FAN_ACCESS_PERM |
 			    FAN_OPEN_PERM, AT_FDCWD, fname) < 0) {
 		if (errno == EINVAL) {
 			tst_brkm(TCONF | TERRNO, cleanup,
 				 "CONFIG_FANOTIFY_ACCESS_PERMISSIONS not "
 				 "configured in kernel?");
 		} else {
 			tst_brkm(TBROK | TERRNO, cleanup,
 				 "fanotify_mark (%d, FAN_MARK_ADD, FAN_ACCESS_PERM | "
 				 "FAN_OPEN_PERM, AT_FDCWD, %s) failed.", fd_notify, fname);
 		}
 	}

 }

 static void cleanup(void)
 {
 	if (fd_notify != -1 && close(fd_notify) == -1)
 		tst_resm(TWARN, "close(%d) failed", fd_notify);

 	tst_rmdir();
 }

 #else

 int main(void)
 {
 	tst_brkm(TCONF, NULL, "system doesn't have required fanotify support");
 }

 #endif
	/*
	* Copyright (c) 2013 SUSE. All Rights Reserved.
	*
	* 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.
	*
	* Started by Jan Kara <jack@suse.cz>
	*
	* DESCRIPTION
	* Check that fanotify permission events work
	*/
	#include "config.h"

	#include <stdio.h>
	#include <unistd.h>
	#include <sys/stat.h>
	#include <sys/types.h>
	#include <sys/fcntl.h>
	#include <sys/wait.h>
	#include <errno.h>
	#include <string.h>
	#include <signal.h>
	#include <sys/syscall.h>
	#include "test.h"
	#include "linux_syscall_numbers.h"
	#include "fanotify.h"
	#include "safe_macros.h"

	char *TCID = "fanotify03";
	int TST_TOTAL = 3;

	#if defined(HAVE_SYS_FANOTIFY_H)
	#include <sys/fanotify.h>

	#define EVENT_MAX 1024
	/* size of the event structure, not counting name */
	#define EVENT_SIZE (sizeof (struct fanotify_event_metadata))
	/* reasonable guess as to size of 1024 events */
	#define EVENT_BUF_LEN (EVENT_MAX * EVENT_SIZE)

	static void setup(void);
	static void cleanup(void);

	#define BUF_SIZE 256
	static char fname[BUF_SIZE];
	static char buf[BUF_SIZE];
	static volatile int fd_notify;

	static pid_t child_pid;

	static unsigned long long event_set[EVENT_MAX];
	static unsigned int event_resp[EVENT_MAX];

	static char event_buf[EVENT_BUF_LEN];

	static void generate_events(void)
	{
	int fd;

	/*
	* generate sequence of events
	*/
	if ((fd = open(fname, O_RDWR \| O_CREAT, 0700)) == -1)
	exit(1);
	if (write(fd, fname, 1) == -1)
	exit(2);

	lseek(fd, 0, SEEK_SET);
	if (read(fd, buf, BUF_SIZE) != -1)
	exit(3);

	if (close(fd) == -1)
	exit(4);
	}

	static void child_handler(int tmp)
	{
	/*
	* Close notification fd so that we cannot block while reading
	* from it
	*/
	close(fd_notify);
	fd_notify = -1;
	}

	static void run_child(void)
	{
	struct sigaction child_action;

	child_action.sa_handler = child_handler;
	sigemptyset(&child_action.sa_mask);
	child_action.sa_flags = SA_NOCLDSTOP;

	if (sigaction(SIGCHLD, &child_action, NULL) < 0) {
	tst_brkm(TBROK \| TERRNO, cleanup,
	"sigaction(SIGCHLD, &child_action, NULL) failed");
	}

	switch (child_pid = fork()) {
	case 0:
	/* Child will generate events now */
	close(fd_notify);
	generate_events();
	exit(0);
	case -1:
	tst_brkm(TBROK \| TERRNO, cleanup, "fork() failed");
	}
	}

	static void check_child(void)
	{
	struct sigaction child_action;
	int child_ret;

	child_action.sa_handler = SIG_IGN;
	sigemptyset(&child_action.sa_mask);
	child_action.sa_flags = SA_NOCLDSTOP;
	if (sigaction(SIGCHLD, &child_action, NULL) < 0) {
	tst_brkm(TBROK \| TERRNO, cleanup,
	"sigaction(SIGCHLD, &child_action, NULL) failed");
	}
	if (waitpid(-1, &child_ret, 0) < 0) {
	tst_brkm(TBROK \| TERRNO, cleanup,
	"waitpid(-1, &child_ret, 0) failed");
	}

	if (WIFSIGNALED(child_ret)) {
	tst_resm(TFAIL, "child exited due to signal %d",
	WTERMSIG(child_ret));
	} else if (WIFEXITED(child_ret)) {
	if (WEXITSTATUS(child_ret) == 0)
	tst_resm(TPASS, "child exited correctly");
	else
	tst_resm(TFAIL, "child exited with status %d",
	WEXITSTATUS(child_ret));
	} else {
	tst_resm(TFAIL, "child exited for unknown reason (status %d)",
	child_ret);
	}
	}

	int main(int ac, char **av)
	{
	int lc;
	const char *msg;
	int fd_notify_backup = -1;

	if ((msg = parse_opts(ac, av, NULL, NULL)) != NULL)
	tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg);

	setup();

	for (lc = 0; TEST_LOOPING(lc); lc++) {
	int ret, len = 0, i = 0, test_num = 0;

	if (fd_notify_backup == -1) {
	fd_notify_backup = dup(fd_notify);
	if (fd_notify_backup < 0)
	tst_brkm(TBROK \| TERRNO, cleanup,
	"dup(%d) failed", fd_notify);
	}
	run_child();

	tst_count = 0;

	event_set[tst_count] = FAN_OPEN_PERM;
	event_resp[tst_count++] = FAN_ALLOW;
	event_set[tst_count] = FAN_ACCESS_PERM;
	event_resp[tst_count++] = FAN_DENY;

	/* tst_count + 1 is for checking child return value */
	if (TST_TOTAL != tst_count + 1) {
	tst_brkm(TBROK, cleanup,
	"TST_TOTAL and tst_count do not match");
	}
	tst_count = 0;

	/*
	* check events
	*/
	while (test_num < TST_TOTAL && fd_notify != -1) {
	struct fanotify_event_metadata *event;

	if (i == len) {
	/* Get more events */
	ret = read(fd_notify, event_buf + len,
	EVENT_BUF_LEN - len);
	if (fd_notify == -1)
	break;
	if (ret < 0) {
	tst_brkm(TBROK, cleanup,
	"read(%d, buf, %zu) failed",
	fd_notify, EVENT_BUF_LEN);
	}
	len += ret;
	}

	event = (struct fanotify_event_metadata *)&event_buf[i];
	if (!(event->mask & event_set[test_num])) {
	tst_resm(TFAIL,
	"get event: mask=%llx (expected %llx) "
	"pid=%u fd=%u",
	(unsigned long long)event->mask,
	event_set[test_num],
	(unsigned)event->pid, event->fd);
	} else if (event->pid != child_pid) {
	tst_resm(TFAIL,
	"get event: mask=%llx pid=%u "
	"(expected %u) fd=%u",
	(unsigned long long)event->mask,
	(unsigned)event->pid,
	(unsigned)child_pid,
	event->fd);
	} else {
	tst_resm(TPASS,
	"get event: mask=%llx pid=%u fd=%u",
	(unsigned long long)event->mask,
	(unsigned)event->pid, event->fd);
	}
	/* Write response to permission event */
	if (event_set[test_num] & FAN_ALL_PERM_EVENTS) {
	struct fanotify_response resp;

	resp.fd = event->fd;
	resp.response = event_resp[test_num];
	SAFE_WRITE(cleanup, 1, fd_notify, &resp,
	sizeof(resp));
	}
	event->mask &= ~event_set[test_num];
	/* No events left in current mask? Go for next event */
	if (event->mask == 0) {
	i += event->event_len;
	close(event->fd);
	}
	test_num++;
	}
	for (; test_num < TST_TOTAL - 1; test_num++) {
	tst_resm(TFAIL, "didn't get event: mask=%llx",
	event_set[test_num]);

	}
	check_child();
	/* We got SIGCHLD while running, resetup fd_notify */
	if (fd_notify == -1) {
	fd_notify = fd_notify_backup;
	fd_notify_backup = -1;
	}
	}

	cleanup();
	tst_exit();
	}

	static void setup(void)
	{
	int fd;

	tst_sig(FORK, DEF_HANDLER, cleanup);

	TEST_PAUSE;

	tst_tmpdir();
	sprintf(fname, "fname_%d", getpid());
	fd = SAFE_OPEN(cleanup, fname, O_CREAT \| O_RDWR, 0644);
	SAFE_WRITE(cleanup, 1, fd, fname, 1);
	SAFE_CLOSE(cleanup, fd);

	if ((fd_notify = fanotify_init(FAN_CLASS_CONTENT, O_RDONLY)) < 0) {
	if (errno == ENOSYS) {
	tst_brkm(TCONF, cleanup,
	"fanotify is not configured in this kernel.");
	} else {
	tst_brkm(TBROK \| TERRNO, cleanup,
	"fanotify_init failed");
	}
	}

	if (fanotify_mark(fd_notify, FAN_MARK_ADD, FAN_ACCESS_PERM \|
	FAN_OPEN_PERM, AT_FDCWD, fname) < 0) {
	if (errno == EINVAL) {
	tst_brkm(TCONF \| TERRNO, cleanup,
	"CONFIG_FANOTIFY_ACCESS_PERMISSIONS not "
	"configured in kernel?");
	} else {
	tst_brkm(TBROK \| TERRNO, cleanup,
	"fanotify_mark (%d, FAN_MARK_ADD, FAN_ACCESS_PERM \| "
	"FAN_OPEN_PERM, AT_FDCWD, %s) failed.", fd_notify, fname);
	}
	}

	}

	static void cleanup(void)
	{
	if (fd_notify != -1 && close(fd_notify) == -1)
	tst_resm(TWARN, "close(%d) failed", fd_notify);

	tst_rmdir();
	}

	#else

	int main(void)
	{
	tst_brkm(TCONF, NULL, "system doesn't have required fanotify support");
	}

	#endif