2 Copyright (c) 2004 The Regents of the University of Michigan.
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
9 1. Redistributions of source code must retain the above copyright
10 notice, this list of conditions and the following disclaimer.
11 2. Redistributions in binary form must reproduce the above copyright
12 notice, this list of conditions and the following disclaimer in the
13 documentation and/or other materials provided with the distribution.
14 3. Neither the name of the University nor the names of its
15 contributors may be used to endorse or promote products derived
16 from this software without specific prior written permission.
18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
19 WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
20 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
21 DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
22 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23 CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24 SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
25 BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
26 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
27 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 #endif /* HAVE_CONFIG_H */
39 #include <sys/param.h>
40 #include <sys/socket.h>
42 #include <netinet/in.h>
57 extern struct pollfd *pollarray;
60 #define POLL_MILLISECS 500
62 static volatile int dir_changed = 1;
64 static void dir_notify_handler(int sig, siginfo_t *si, void *data)
70 scan_poll_results(int ret)
73 struct clnt_info *clp;
75 for (clp = clnt_list.tqh_first; clp != NULL; clp = clp->list.tqe_next)
77 i = clp->krb5_poll_index;
78 if (i >= 0 && pollarray[i].revents) {
79 if (pollarray[i].revents & POLLHUP)
81 if (pollarray[i].revents & POLLIN)
82 handle_krb5_upcall(clp);
83 pollarray[clp->krb5_poll_index].revents = 0;
88 i = clp->spkm3_poll_index;
89 if (i >= 0 && pollarray[i].revents) {
90 if (pollarray[i].revents & POLLHUP)
92 if (pollarray[i].revents & POLLIN)
93 handle_spkm3_upcall(clp);
94 pollarray[clp->spkm3_poll_index].revents = 0;
103 topdirs_add_entry(struct dirent *dent)
105 struct topdirs_info *tdi;
107 tdi = calloc(sizeof(struct topdirs_info), 1);
109 printerr(0, "ERROR: Couldn't allocate struct topdirs_info\n");
112 tdi->dirname = malloc(PATH_MAX);
113 if (tdi->dirname == NULL) {
114 printerr(0, "ERROR: Couldn't allocate directory name\n");
118 snprintf(tdi->dirname, PATH_MAX, "%s/%s", pipefs_dir, dent->d_name);
119 tdi->fd = open(tdi->dirname, O_RDONLY);
121 fcntl(tdi->fd, F_SETSIG, DNOTIFY_SIGNAL);
122 fcntl(tdi->fd, F_NOTIFY,
123 DN_CREATE|DN_DELETE|DN_MODIFY|DN_MULTISHOT);
126 TAILQ_INSERT_HEAD(&topdirs_list, tdi, list);
131 topdirs_free_list(void)
133 struct topdirs_info *tdi;
135 TAILQ_FOREACH(tdi, &topdirs_list, list) {
139 TAILQ_REMOVE(&topdirs_list, tdi, list);
145 topdirs_init_list(void)
151 TAILQ_INIT(&topdirs_list);
153 pipedir = opendir(pipefs_dir);
154 if (pipedir == NULL) {
155 printerr(0, "ERROR: could not open rpc_pipefs directory '%s': "
156 "%s\n", pipefs_dir, strerror(errno));
159 for (dent = readdir(pipedir); dent != NULL; dent = readdir(pipedir)) {
160 if (dent->d_type != DT_DIR ||
161 strcmp(dent->d_name, ".") == 0 ||
162 strcmp(dent->d_name, "..") == 0) {
165 ret = topdirs_add_entry(dent);
180 struct sigaction dn_act;
183 /* Taken from linux/Documentation/dnotify.txt: */
184 dn_act.sa_sigaction = dir_notify_handler;
185 sigemptyset(&dn_act.sa_mask);
186 dn_act.sa_flags = SA_SIGINFO;
187 sigaction(DNOTIFY_SIGNAL, &dn_act, NULL);
189 /* just in case the signal is blocked... */
191 sigaddset(&set, DNOTIFY_SIGNAL);
192 sigprocmask(SIG_UNBLOCK, &set, NULL);
194 if (topdirs_init_list() != 0)
199 printerr(1, "beginning poll\n");
201 while (dir_changed) {
203 if (update_client_list()) {
204 /* Error msg is already printed */
208 /* race condition here: dir_changed could be set before we
209 * enter the poll, and we'd never notice if it weren't for the
211 ret = poll(pollarray, pollsize, POLL_MILLISECS);
215 "WARNING: error return from poll\n");
216 } else if (ret == 0) {
218 } else { /* ret > 0 */
219 scan_poll_results(ret);