| /* |
| * Copyright (c) 2014 SUSE Linux. 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. |
| * |
| * Started by Jan Kara <jack@suse.cz> |
| * |
| * DESCRIPTION |
| * Check that fanotify overflow event is properly generated |
| * |
| * ALGORITHM |
| * Generate enough events without reading them and check that overflow |
| * event is generated. |
| */ |
| #include "config.h" |
| |
| #include <stdio.h> |
| #include <sys/stat.h> |
| #include <sys/types.h> |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <sys/syscall.h> |
| #include "tst_test.h" |
| #include "fanotify.h" |
| |
| #if defined(HAVE_SYS_FANOTIFY_H) |
| #include <sys/fanotify.h> |
| |
| /* Currently this is fixed in kernel... */ |
| #define MAX_EVENTS 16384 |
| |
| #define BUF_SIZE 256 |
| static char fname[BUF_SIZE]; |
| static int fd, fd_notify; |
| |
| struct fanotify_event_metadata event; |
| |
| void test01(void) |
| { |
| int i; |
| int len; |
| |
| /* |
| * generate events |
| */ |
| for (i = 0; i < MAX_EVENTS + 1; i++) { |
| sprintf(fname, "fname_%d", i); |
| fd = SAFE_OPEN(fname, O_RDWR | O_CREAT, 0644); |
| SAFE_CLOSE(fd); |
| } |
| |
| while (1) { |
| /* |
| * get list on events |
| */ |
| len = read(fd_notify, &event, sizeof(event)); |
| if (len < 0) { |
| if (errno == -EAGAIN) { |
| tst_res(TFAIL, "Overflow event not " |
| "generated!\n"); |
| break; |
| } |
| tst_brk(TBROK | TERRNO, |
| "read of notification event failed"); |
| break; |
| } |
| if (event.fd != FAN_NOFD) |
| close(event.fd); |
| |
| /* |
| * check events |
| */ |
| if (event.mask != FAN_OPEN && |
| event.mask != FAN_Q_OVERFLOW) { |
| tst_res(TFAIL, |
| "get event: mask=%llx (expected %llx)" |
| "pid=%u fd=%d", |
| (unsigned long long)event.mask, |
| (unsigned long long)FAN_OPEN, |
| (unsigned)event.pid, event.fd); |
| break; |
| } |
| if (event.mask == FAN_Q_OVERFLOW) { |
| if (event.fd != FAN_NOFD) { |
| tst_res(TFAIL, |
| "invalid overflow event: " |
| "mask=%llx pid=%u fd=%d", |
| (unsigned long long)event.mask, |
| (unsigned)event.pid, |
| event.fd); |
| break; |
| } |
| tst_res(TPASS, |
| "get event: mask=%llx pid=%u fd=%d", |
| (unsigned long long)event.mask, |
| (unsigned)event.pid, event.fd); |
| break; |
| } |
| } |
| } |
| |
| static void setup(void) |
| { |
| fd_notify = SAFE_FANOTIFY_INIT(FAN_CLASS_NOTIF | FAN_NONBLOCK, |
| O_RDONLY); |
| |
| if (fanotify_mark(fd_notify, FAN_MARK_MOUNT | FAN_MARK_ADD, FAN_OPEN, |
| AT_FDCWD, ".") < 0) { |
| tst_brk(TBROK | TERRNO, |
| "fanotify_mark (%d, FAN_MARK_MOUNT | FAN_MARK_ADD, " |
| "FAN_OPEN, AT_FDCWD, \".\") failed", |
| fd_notify); |
| } |
| } |
| |
| static void cleanup(void) |
| { |
| if (fd_notify > 0) |
| SAFE_CLOSE(fd_notify); |
| } |
| |
| static struct tst_test test = { |
| .test_all = test01, |
| .setup = setup, |
| .cleanup = cleanup, |
| .needs_root = 1, |
| .needs_tmpdir = 1, |
| }; |
| #else |
| TST_TEST_TCONF("system doesn't have required fanotify support"); |
| #endif |