/* * Copyright (c) 2007 SWSoft. 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 Andrew Vagin * * DESCRIPTION * Check that inotify work for a directory * * ALGORITHM * Execute sequence file's operation and check return events */ #include "config.h" #include #include #include #include #include #include #include #include #include "tst_test.h" #include "inotify.h" #if defined(HAVE_SYS_INOTIFY_H) #include #ifndef IN_MOVE_SELF #define IN_MOVE_SELF 0x00000800 #endif #define EVENT_MAX 1024 /* size of the event structure, not counting name */ #define EVENT_SIZE (sizeof (struct inotify_event)) /* reasonable guess as to size of 1024 events */ #define EVENT_BUF_LEN (EVENT_MAX * (EVENT_SIZE + 16)) #define BUF_SIZE 256 static char fname1[BUF_SIZE], fname2[BUF_SIZE], fname3[BUF_SIZE]; static int fd, fd_notify, reap_wd; static int wd; struct event_t { char name[BUF_SIZE]; unsigned int mask; }; #define FILE_NAME1 "test_file1" #define FILE_NAME2 "test_file2" static struct event_t event_set[EVENT_MAX]; static char event_buf[EVENT_BUF_LEN]; void verify_inotify(void) { unsigned int stored_cookie = UINT_MAX; int test_cnt = 0; /* * generate sequence of events */ SAFE_CHMOD(".", 0755); event_set[test_cnt].mask = IN_ISDIR | IN_ATTRIB; strcpy(event_set[test_cnt].name, ""); test_cnt++; if ((fd = creat(FILE_NAME1, 0755)) == -1) { tst_brk(TBROK | TERRNO, "creat(\"%s\", 755) failed", FILE_NAME1); } event_set[test_cnt].mask = IN_CREATE; strcpy(event_set[test_cnt].name, FILE_NAME1); test_cnt++; event_set[test_cnt].mask = IN_OPEN; strcpy(event_set[test_cnt].name, FILE_NAME1); test_cnt++; SAFE_CLOSE(fd); event_set[test_cnt].mask = IN_CLOSE_WRITE; strcpy(event_set[test_cnt].name, FILE_NAME1); test_cnt++; SAFE_RENAME(FILE_NAME1, FILE_NAME2); event_set[test_cnt].mask = IN_MOVED_FROM; strcpy(event_set[test_cnt].name, FILE_NAME1); test_cnt++; event_set[test_cnt].mask = IN_MOVED_TO; strcpy(event_set[test_cnt].name, FILE_NAME2); test_cnt++; if (getcwd(fname1, BUF_SIZE) == NULL) { tst_brk(TBROK | TERRNO, "getcwd(%p, %d) failed", fname1, BUF_SIZE); } snprintf(fname2, BUF_SIZE, "%s.rename1", fname1); SAFE_RENAME(fname1, fname2); event_set[test_cnt].mask = IN_MOVE_SELF; strcpy(event_set[test_cnt].name, ""); test_cnt++; SAFE_UNLINK(FILE_NAME2); event_set[test_cnt].mask = IN_DELETE; strcpy(event_set[test_cnt].name, FILE_NAME2); test_cnt++; /* * test that duplicate events will be coalesced into * a single event. This test case should be last, that * we can correct determine kernel bug which exist before * 2.6.25. See comment below. */ snprintf(fname3, BUF_SIZE, "%s.rename2", fname1); SAFE_RENAME(fname2, fname3); SAFE_RENAME(fname3, fname1); event_set[test_cnt].mask = IN_MOVE_SELF; strcpy(event_set[test_cnt].name, ""); test_cnt++; int len, i = 0, test_num = 0; if ((len = read(fd_notify, event_buf, EVENT_BUF_LEN)) == -1) { tst_brk(TBROK | TERRNO, "read(%d, buf, %zu) failed", fd_notify, EVENT_BUF_LEN); } while (i < len) { struct inotify_event *event; event = (struct inotify_event *)&event_buf[i]; if (test_num >= test_cnt) { if (tst_kvercmp(2, 6, 25) < 0 && event_set[test_cnt - 1].mask == event->mask) tst_res(TWARN, "This may be kernel bug. " "Before kernel 2.6.25, a kernel bug " "meant that the kernel code that was " "intended to coalesce successive identical " "events (i.e., the two most recent " "events could potentially be coalesced " "if the older had not yet been read) " "instead checked if the most recent event " "could be coalesced with the oldest " "unread event. This has been fixed by commit" "1c17d18e3775485bf1e0ce79575eb637a94494a2."); tst_res(TFAIL, "get unnecessary event: " "wd=%d mask=%08x cookie=%-5u len=%-2u" "name=\"%.*s\"", event->wd, event->mask, event->cookie, event->len, event->len, event->name); } else if ((event_set[test_num].mask == event->mask) && (!strncmp (event_set[test_num].name, event->name, event->len))) { int fail = 0; if (event->mask == IN_MOVED_FROM) { if (event->cookie == 0) fail = 1; else stored_cookie = event->cookie; } else if (event->mask == IN_MOVED_TO) { if (event->cookie != stored_cookie) fail = 1; else stored_cookie = UINT_MAX; } else { if (event->cookie != 0) fail = 1; } if (!fail) { tst_res(TPASS, "get event: wd=%d mask=%08x " "cookie=%-5u len=%-2u name=\"%.*s\"", event->wd, event->mask, event->cookie, event->len, event->len, event->name); } else { tst_res(TFAIL, "get event: wd=%d mask=%08x " "cookie=%-5u (wrong) len=%-2u " "name=\"%s\"", event->wd, event->mask, event->cookie, event->len, event->name); } } else { tst_res(TFAIL, "get event: wd=%d mask=%08x " "(expected %x) cookie=%-5u len=%-2u " "name=\"%s\" (expected \"%s\") %d", event->wd, event->mask, event_set[test_num].mask, event->cookie, event->len, event->name, event_set[test_num].name, strcmp(event_set[test_num].name, event->name)); } test_num++; i += EVENT_SIZE + event->len; } for (; test_num < test_cnt; test_num++) { tst_res(TFAIL, "didn't get event: mask=%08x ", event_set[test_num].mask); } } static void setup(void) { if ((fd_notify = myinotify_init()) < 0) { if (errno == ENOSYS) { tst_brk(TCONF, "inotify is not configured in this kernel."); } else { tst_brk(TBROK | TERRNO, "inotify_init () failed"); } } if ((wd = myinotify_add_watch(fd_notify, ".", IN_ALL_EVENTS)) < 0) { tst_brk(TBROK | TERRNO, "inotify_add_watch (%d, \".\", IN_ALL_EVENTS) failed", fd_notify); reap_wd = 1; }; } static void cleanup(void) { if (reap_wd && myinotify_rm_watch(fd_notify, wd) < 0) { tst_res(TWARN, "inotify_rm_watch (%d, %d) failed,", fd_notify, wd); } if (fd_notify > 0) SAFE_CLOSE(fd_notify); } static struct tst_test test = { .needs_tmpdir = 1, .setup = setup, .cleanup = cleanup, .test_all = verify_inotify, }; #else TST_TEST_TCONF("system doesn't have required inotify support"); #endif