| /* |
| * 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 various fanotify special flags |
| */ |
| #include "config.h" |
| |
| #include <stdio.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <sys/fcntl.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <sys/syscall.h> |
| #include "test.h" |
| #include "linux_syscall_numbers.h" |
| #include "fanotify.h" |
| #include "safe_macros.h" |
| |
| char *TCID = "fanotify04"; |
| int TST_TOTAL = 9; |
| |
| #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 sname[BUF_SIZE]; |
| static char dir[BUF_SIZE]; |
| static int fd_notify; |
| |
| static int len; |
| static char event_buf[EVENT_BUF_LEN]; |
| |
| static char *expect_str_fail(int expect) |
| { |
| if (expect == 0) |
| return "failed"; |
| return "unexpectedly succeeded"; |
| } |
| |
| static char *expect_str_pass(int expect) |
| { |
| if (expect == 0) |
| return "succeeded"; |
| return "failed"; |
| } |
| |
| static void check_mark(char *file, unsigned long long flag, char *flagstr, |
| int expect, void (*test_event)(char *)) |
| { |
| if (fanotify_mark(fd_notify, FAN_MARK_ADD | flag, FAN_OPEN, AT_FDCWD, |
| file) != expect) { |
| tst_resm(TFAIL, |
| "fanotify_mark (%d, FAN_MARK_ADD | %s, FAN_OPEN, AT_FDCWD, " |
| "'%s') %s", fd_notify, flagstr, file, expect_str_fail(expect)); |
| } else { |
| tst_resm(TPASS, |
| "fanotify_mark (%d, FAN_MARK_ADD | %s, FAN_OPEN, AT_FDCWD, " |
| "'%s') %s", fd_notify, flagstr, file, expect_str_pass(expect)); |
| |
| /* If we expected failure there's nothing to clean up */ |
| if (expect == -1) |
| return; |
| |
| if (test_event) |
| test_event(file); |
| |
| if (fanotify_mark(fd_notify, FAN_MARK_REMOVE | flag, |
| FAN_OPEN, AT_FDCWD, file) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "fanotify_mark (%d, FAN_MARK_REMOVE | %s, " |
| "FAN_OPEN, AT_FDCWD, '%s') failed", |
| fd_notify, flagstr, file); |
| } |
| } |
| } |
| |
| #define CHECK_MARK(file, flag, expect, func) check_mark(file, flag, #flag, expect, func) |
| |
| static void do_open(char *file, int flag, char *flagstr) |
| { |
| int fd; |
| |
| fd = SAFE_OPEN(cleanup, file, O_RDONLY | flag); |
| SAFE_CLOSE(cleanup, fd); |
| } |
| |
| #define DO_OPEN(file, flag) do_open(file, flag, #flag) |
| |
| static void open_file(char *file) |
| { |
| DO_OPEN(file, 0); |
| } |
| |
| static void open_dir(char *file) |
| { |
| DO_OPEN(file, O_DIRECTORY); |
| } |
| |
| static void verify_event(int mask) |
| { |
| int ret; |
| struct fanotify_event_metadata *event; |
| struct stat st; |
| |
| /* Read the event */ |
| ret = SAFE_READ(cleanup, 0, fd_notify, event_buf + len, |
| EVENT_BUF_LEN - len); |
| event = (struct fanotify_event_metadata *)&event_buf[len]; |
| len += ret; |
| |
| if (event->mask != FAN_OPEN) { |
| tst_resm(TFAIL, "got unexpected event %llx", |
| (unsigned long long)event->mask); |
| } else if (fstat(event->fd, &st) < 0) { |
| tst_resm(TFAIL, "failed to stat event->fd (%s)", |
| strerror(errno)); |
| } else if ((st.st_mode & S_IFMT) != mask) { |
| tst_resm(TFAIL, "event->fd points to object of different type " |
| "(%o != %o)", st.st_mode & S_IFMT, mask); |
| } else { |
| tst_resm(TPASS, "event generated properly for type %o", mask); |
| } |
| close(event->fd); |
| } |
| |
| static void do_open_test(char *file, int flag, char *flagstr, int mask) |
| { |
| do_open(file, flag, flagstr); |
| |
| verify_event(mask); |
| } |
| |
| #define DO_OPEN_TEST(file, flag, mask) do_open_test(file, flag, #flag, mask) |
| |
| static void test_open_file(char *file) |
| { |
| DO_OPEN_TEST(file, 0, S_IFREG); |
| } |
| |
| static void verify_no_event(void) |
| { |
| int ret; |
| |
| ret = read(fd_notify, event_buf + len, EVENT_BUF_LEN - len); |
| if (ret != -1) { |
| struct fanotify_event_metadata *event; |
| |
| event = (struct fanotify_event_metadata *)&event_buf[len]; |
| tst_resm(TFAIL, "seen unexpected event (mask %llx)", |
| (unsigned long long)event->mask); |
| /* Cleanup fd from the event */ |
| close(event->fd); |
| } else if (errno != EAGAIN) { |
| tst_resm(TFAIL | TERRNO, "read(%d, buf, %zu) failed", fd_notify, |
| EVENT_BUF_LEN); |
| } else { |
| tst_resm(TPASS, "No event as expected"); |
| } |
| } |
| |
| static void test_open_symlink(char *file) |
| { |
| /* Since mark is on a symlink, no event should be generated by opening a file */ |
| DO_OPEN(file, 0); |
| verify_no_event(); |
| } |
| |
| int main(int ac, char **av) |
| { |
| int lc; |
| const char *msg; |
| |
| 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++) { |
| /* Check ONLYDIR on a directory */ |
| CHECK_MARK(".", FAN_MARK_ONLYDIR, 0, NULL); |
| |
| /* Check ONLYDIR without a directory */ |
| CHECK_MARK(fname, FAN_MARK_ONLYDIR, -1, NULL); |
| |
| /* Check DONT_FOLLOW for a symlink */ |
| CHECK_MARK(sname, FAN_MARK_DONT_FOLLOW, 0, test_open_symlink); |
| |
| /* Check without DONT_FOLLOW for a symlink */ |
| CHECK_MARK(sname, 0, 0, test_open_file); |
| |
| /* Verify FAN_MARK_FLUSH destroys all inode marks */ |
| if (fanotify_mark(fd_notify, FAN_MARK_ADD, |
| FAN_OPEN, AT_FDCWD, fname) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "fanotify_mark (%d, FAN_MARK_ADD, FAN_OPEN, " |
| "AT_FDCWD, '%s') failed", fd_notify, fname); |
| } |
| if (fanotify_mark(fd_notify, FAN_MARK_ADD, |
| FAN_OPEN | FAN_ONDIR, AT_FDCWD, dir) < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "fanotify_mark (%d, FAN_MARK_ADD, FAN_OPEN | " |
| "FAN_ONDIR, AT_FDCWD, '%s') failed", fd_notify, |
| dir); |
| } |
| open_file(fname); |
| verify_event(S_IFREG); |
| open_dir(dir); |
| verify_event(S_IFDIR); |
| if (fanotify_mark(fd_notify, FAN_MARK_FLUSH, |
| 0, AT_FDCWD, ".") < 0) { |
| tst_brkm(TBROK | TERRNO, cleanup, |
| "fanotify_mark (%d, FAN_MARK_FLUSH, 0, " |
| "AT_FDCWD, '.') failed", fd_notify); |
| } |
| |
| open_dir(dir); |
| verify_no_event(); |
| } |
| |
| cleanup(); |
| tst_exit(); |
| } |
| |
| static void setup(void) |
| { |
| int fd; |
| |
| tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| |
| TEST_PAUSE; |
| |
| tst_tmpdir(); |
| sprintf(fname, "fname_%d", getpid()); |
| fd = SAFE_OPEN(cleanup, fname, O_RDWR | O_CREAT, 0644); |
| SAFE_CLOSE(cleanup, fd); |
| |
| sprintf(sname, "symlink_%d", getpid()); |
| SAFE_SYMLINK(cleanup, fname, sname); |
| |
| sprintf(dir, "dir_%d", getpid()); |
| SAFE_MKDIR(cleanup, dir, 0755); |
| |
| if ((fd_notify = fanotify_init(FAN_CLASS_NOTIF | FAN_NONBLOCK, |
| 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"); |
| } |
| } |
| } |
| |
| static void cleanup(void) |
| { |
| if (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 |