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->gssd_poll_index;
78 if (i >= 0 && pollarray[i].revents) {
79 if (pollarray[i].revents & POLLHUP)
81 if (pollarray[i].revents & POLLIN)
82 handle_gssd_upcall(clp);
83 pollarray[clp->gssd_poll_index].revents = 0;
88 i = clp->krb5_poll_index;
89 if (i >= 0 && pollarray[i].revents) {
90 if (pollarray[i].revents & POLLHUP)
92 if (pollarray[i].revents & POLLIN)
93 handle_krb5_upcall(clp);
94 pollarray[clp->krb5_poll_index].revents = 0;
99 i = clp->spkm3_poll_index;
100 if (i >= 0 && pollarray[i].revents) {
101 if (pollarray[i].revents & POLLHUP)
103 if (pollarray[i].revents & POLLIN)
104 handle_spkm3_upcall(clp);
105 pollarray[clp->spkm3_poll_index].revents = 0;
114 topdirs_add_entry(struct dirent *dent)
116 struct topdirs_info *tdi;
118 tdi = calloc(sizeof(struct topdirs_info), 1);
120 printerr(0, "ERROR: Couldn't allocate struct topdirs_info\n");
123 tdi->dirname = malloc(PATH_MAX);
124 if (tdi->dirname == NULL) {
125 printerr(0, "ERROR: Couldn't allocate directory name\n");
129 snprintf(tdi->dirname, PATH_MAX, "%s/%s", pipefs_dir, dent->d_name);
130 tdi->fd = open(tdi->dirname, O_RDONLY);
132 fcntl(tdi->fd, F_SETSIG, DNOTIFY_SIGNAL);
133 fcntl(tdi->fd, F_NOTIFY,
134 DN_CREATE|DN_DELETE|DN_MODIFY|DN_MULTISHOT);
137 TAILQ_INSERT_HEAD(&topdirs_list, tdi, list);
142 topdirs_free_list(void)
144 struct topdirs_info *tdi;
146 TAILQ_FOREACH(tdi, &topdirs_list, list) {
150 TAILQ_REMOVE(&topdirs_list, tdi, list);
156 topdirs_init_list(void)
162 TAILQ_INIT(&topdirs_list);
164 pipedir = opendir(pipefs_dir);
165 if (pipedir == NULL) {
166 printerr(0, "ERROR: could not open rpc_pipefs directory '%s': "
167 "%s\n", pipefs_dir, strerror(errno));
170 for (dent = readdir(pipedir); dent != NULL; dent = readdir(pipedir)) {
171 if (dent->d_type != DT_DIR ||
172 strcmp(dent->d_name, ".") == 0 ||
173 strcmp(dent->d_name, "..") == 0) {
176 ret = topdirs_add_entry(dent);
191 struct sigaction dn_act;
194 /* Taken from linux/Documentation/dnotify.txt: */
195 dn_act.sa_sigaction = dir_notify_handler;
196 sigemptyset(&dn_act.sa_mask);
197 dn_act.sa_flags = SA_SIGINFO;
198 sigaction(DNOTIFY_SIGNAL, &dn_act, NULL);
200 /* just in case the signal is blocked... */
202 sigaddset(&set, DNOTIFY_SIGNAL);
203 sigprocmask(SIG_UNBLOCK, &set, NULL);
205 if (topdirs_init_list() != 0)
210 printerr(1, "beginning poll\n");
212 while (dir_changed) {
214 if (update_client_list()) {
215 /* Error msg is already printed */
219 /* race condition here: dir_changed could be set before we
220 * enter the poll, and we'd never notice if it weren't for the
222 ret = poll(pollarray, pollsize, POLL_MILLISECS);
226 "WARNING: error return from poll\n");
227 } else if (ret == 0) {
229 } else { /* ret > 0 */
230 scan_poll_results(ret);