Jan Kara | 8b01a2a | 2014-02-24 16:15:11 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2014 SUSE Linux. All Rights Reserved. |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify it |
| 5 | * under the terms of version 2 of the GNU General Public License as |
| 6 | * published by the Free Software Foundation. |
| 7 | * |
| 8 | * This program is distributed in the hope that it would be useful, but |
| 9 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| 11 | * |
| 12 | * Further, this software is distributed without any warranty that it is |
| 13 | * free of the rightful claim of any third person regarding infringement |
| 14 | * or the like. Any license provided herein, whether implied or |
| 15 | * otherwise, applies only to this software file. Patent licenses, if |
| 16 | * any, provided herein do not apply to combinations of this program with |
| 17 | * other software, or any other product whatsoever. |
| 18 | * |
| 19 | * Started by Jan Kara <jack@suse.cz> |
| 20 | * |
| 21 | * DESCRIPTION |
| 22 | * Check that fanotify overflow event is properly generated |
| 23 | * |
| 24 | * ALGORITHM |
| 25 | * Generate enough events without reading them and check that overflow |
| 26 | * event is generated. |
| 27 | */ |
| 28 | #include "config.h" |
| 29 | |
| 30 | #include <stdio.h> |
| 31 | #include <sys/stat.h> |
| 32 | #include <sys/types.h> |
| 33 | #include <sys/fcntl.h> |
| 34 | #include <errno.h> |
| 35 | #include <string.h> |
| 36 | #include <sys/syscall.h> |
| 37 | #include "test.h" |
Jan Kara | 8b01a2a | 2014-02-24 16:15:11 +0100 | [diff] [blame] | 38 | #include "linux_syscall_numbers.h" |
| 39 | #include "fanotify.h" |
| 40 | #include "safe_macros.h" |
| 41 | |
| 42 | char *TCID = "fanotify05"; |
| 43 | int TST_TOTAL = 1; |
| 44 | |
| 45 | #if defined(HAVE_SYS_FANOTIFY_H) |
| 46 | #include <sys/fanotify.h> |
| 47 | |
| 48 | /* Currently this is fixed in kernel... */ |
| 49 | #define MAX_EVENTS 16384 |
| 50 | |
| 51 | static void setup(void); |
| 52 | static void cleanup(void); |
| 53 | |
| 54 | #define BUF_SIZE 256 |
| 55 | static char fname[BUF_SIZE]; |
| 56 | static int fd, fd_notify; |
| 57 | |
| 58 | struct fanotify_event_metadata event; |
| 59 | |
| 60 | int main(int ac, char **av) |
| 61 | { |
| 62 | int lc, i; |
Cyril Hrubis | 0b9589f | 2014-05-27 17:40:33 +0200 | [diff] [blame] | 63 | const char *msg; |
Jan Kara | 8b01a2a | 2014-02-24 16:15:11 +0100 | [diff] [blame] | 64 | int len; |
| 65 | |
| 66 | msg = parse_opts(ac, av, NULL, NULL); |
| 67 | if (msg != NULL) |
| 68 | tst_brkm(TBROK, NULL, "OPTION PARSING ERROR - %s", msg); |
| 69 | |
| 70 | setup(); |
| 71 | |
| 72 | for (lc = 0; TEST_LOOPING(lc); lc++) { |
| 73 | /* |
| 74 | * generate events |
| 75 | */ |
| 76 | for (i = 0; i < MAX_EVENTS + 1; i++) { |
| 77 | sprintf(fname, "fname_%d", i); |
| 78 | fd = SAFE_OPEN(cleanup, fname, O_RDWR | O_CREAT, 0644); |
| 79 | SAFE_CLOSE(cleanup, fd); |
| 80 | } |
| 81 | |
| 82 | while (1) { |
| 83 | /* |
| 84 | * get list on events |
| 85 | */ |
| 86 | len = read(fd_notify, &event, sizeof(event)); |
| 87 | if (len < 0) { |
| 88 | if (errno == -EAGAIN) { |
| 89 | tst_resm(TFAIL, "Overflow event not " |
| 90 | "generated!\n"); |
| 91 | break; |
| 92 | } |
| 93 | tst_brkm(TBROK | TERRNO, cleanup, |
| 94 | "read of notification event failed"); |
| 95 | break; |
| 96 | } |
| 97 | if (event.fd != FAN_NOFD) |
| 98 | close(event.fd); |
| 99 | |
| 100 | /* |
| 101 | * check events |
| 102 | */ |
| 103 | if (event.mask != FAN_OPEN && |
| 104 | event.mask != FAN_Q_OVERFLOW) { |
| 105 | tst_resm(TFAIL, |
| 106 | "get event: mask=%llx (expected %llx)" |
| 107 | "pid=%u fd=%d", |
| 108 | (unsigned long long)event.mask, |
| 109 | (unsigned long long)FAN_OPEN, |
| 110 | (unsigned)event.pid, event.fd); |
| 111 | break; |
| 112 | } |
| 113 | if (event.mask == FAN_Q_OVERFLOW) { |
| 114 | if (event.fd != FAN_NOFD) { |
| 115 | tst_resm(TFAIL, |
| 116 | "invalid overflow event: " |
| 117 | "mask=%llx pid=%u fd=%d", |
| 118 | (unsigned long long)event.mask, |
| 119 | (unsigned)event.pid, |
| 120 | event.fd); |
| 121 | break; |
| 122 | } |
| 123 | tst_resm(TPASS, |
| 124 | "get event: mask=%llx pid=%u fd=%d", |
| 125 | (unsigned long long)event.mask, |
| 126 | (unsigned)event.pid, event.fd); |
| 127 | break; |
| 128 | } |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | cleanup(); |
| 133 | tst_exit(); |
| 134 | } |
| 135 | |
| 136 | static void setup(void) |
| 137 | { |
| 138 | tst_sig(NOFORK, DEF_HANDLER, cleanup); |
| 139 | |
| 140 | TEST_PAUSE; |
| 141 | |
| 142 | tst_tmpdir(); |
| 143 | |
Helge Deller | ff96476 | 2014-07-29 18:10:40 +0200 | [diff] [blame] | 144 | fd_notify = fanotify_init(FAN_CLASS_NOTIF | FAN_NONBLOCK, O_RDONLY); |
Jan Kara | 8b01a2a | 2014-02-24 16:15:11 +0100 | [diff] [blame] | 145 | if (fd_notify < 0) { |
| 146 | if (errno == ENOSYS) { |
| 147 | tst_brkm(TCONF, cleanup, |
| 148 | "fanotify is not configured in this kernel."); |
| 149 | } else { |
| 150 | tst_brkm(TBROK | TERRNO, cleanup, |
| 151 | "fanotify_init failed"); |
| 152 | } |
| 153 | } |
| 154 | |
Helge Deller | ff96476 | 2014-07-29 18:10:40 +0200 | [diff] [blame] | 155 | if (fanotify_mark(fd_notify, FAN_MARK_MOUNT | FAN_MARK_ADD, FAN_OPEN, |
Jan Kara | 8b01a2a | 2014-02-24 16:15:11 +0100 | [diff] [blame] | 156 | AT_FDCWD, ".") < 0) { |
| 157 | tst_brkm(TBROK | TERRNO, cleanup, |
| 158 | "fanotify_mark (%d, FAN_MARK_MOUNT | FAN_MARK_ADD, " |
| 159 | "FAN_OPEN, AT_FDCWD, \".\") failed", |
| 160 | fd_notify); |
| 161 | } |
| 162 | } |
| 163 | |
| 164 | static void cleanup(void) |
| 165 | { |
| 166 | if (fd_notify > 0 && close(fd_notify) == -1) |
| 167 | tst_resm(TWARN, "close(%d) failed", fd_notify); |
| 168 | |
Jan Kara | 8b01a2a | 2014-02-24 16:15:11 +0100 | [diff] [blame] | 169 | tst_rmdir(); |
| 170 | } |
| 171 | |
| 172 | #else |
| 173 | |
| 174 | int main(void) |
| 175 | { |
| 176 | tst_brkm(TCONF, NULL, "system doesn't have required fanotify support"); |
| 177 | } |
| 178 | |
| 179 | #endif |