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)
66 printerr(2, "dir_notify_handler: sig %d si %p data %p\n", sig, si, data);
72 scan_poll_results(int ret)
75 struct clnt_info *clp;
77 for (clp = clnt_list.tqh_first; clp != NULL; clp = clp->list.tqe_next)
79 i = clp->gssd_poll_index;
80 if (i >= 0 && pollarray[i].revents) {
81 if (pollarray[i].revents & POLLHUP)
83 if (pollarray[i].revents & POLLIN)
84 handle_gssd_upcall(clp);
85 pollarray[clp->gssd_poll_index].revents = 0;
90 i = clp->krb5_poll_index;
91 if (i >= 0 && pollarray[i].revents) {
92 if (pollarray[i].revents & POLLHUP)
94 if (pollarray[i].revents & POLLIN)
95 handle_krb5_upcall(clp);
96 pollarray[clp->krb5_poll_index].revents = 0;
101 i = clp->spkm3_poll_index;
102 if (i >= 0 && pollarray[i].revents) {
103 if (pollarray[i].revents & POLLHUP)
105 if (pollarray[i].revents & POLLIN)
106 handle_spkm3_upcall(clp);
107 pollarray[clp->spkm3_poll_index].revents = 0;
116 topdirs_add_entry(struct dirent *dent)
118 struct topdirs_info *tdi;
120 tdi = calloc(sizeof(struct topdirs_info), 1);
122 printerr(0, "ERROR: Couldn't allocate struct topdirs_info\n");
125 tdi->dirname = malloc(PATH_MAX);
126 if (tdi->dirname == NULL) {
127 printerr(0, "ERROR: Couldn't allocate directory name\n");
131 snprintf(tdi->dirname, PATH_MAX, "%s/%s", pipefs_dir, dent->d_name);
132 tdi->fd = open(tdi->dirname, O_RDONLY);
134 fcntl(tdi->fd, F_SETSIG, DNOTIFY_SIGNAL);
135 fcntl(tdi->fd, F_NOTIFY,
136 DN_CREATE|DN_DELETE|DN_MODIFY|DN_MULTISHOT);
139 TAILQ_INSERT_HEAD(&topdirs_list, tdi, list);
144 topdirs_free_list(void)
146 struct topdirs_info *tdi;
148 TAILQ_FOREACH(tdi, &topdirs_list, list) {
152 TAILQ_REMOVE(&topdirs_list, tdi, list);
158 topdirs_init_list(void)
164 TAILQ_INIT(&topdirs_list);
166 pipedir = opendir(pipefs_dir);
167 if (pipedir == NULL) {
168 printerr(0, "ERROR: could not open rpc_pipefs directory '%s': "
169 "%s\n", pipefs_dir, strerror(errno));
172 for (dent = readdir(pipedir); dent != NULL; dent = readdir(pipedir)) {
173 if (dent->d_type != DT_DIR ||
174 strcmp(dent->d_name, ".") == 0 ||
175 strcmp(dent->d_name, "..") == 0) {
178 ret = topdirs_add_entry(dent);
193 struct sigaction dn_act;
196 /* Taken from linux/Documentation/dnotify.txt: */
197 dn_act.sa_sigaction = dir_notify_handler;
198 sigemptyset(&dn_act.sa_mask);
199 dn_act.sa_flags = SA_SIGINFO;
200 sigaction(DNOTIFY_SIGNAL, &dn_act, NULL);
202 /* just in case the signal is blocked... */
204 sigaddset(&set, DNOTIFY_SIGNAL);
205 sigprocmask(SIG_UNBLOCK, &set, NULL);
207 if (topdirs_init_list() != 0)
212 printerr(1, "beginning poll\n");
214 while (dir_changed) {
216 if (update_client_list()) {
217 /* Error msg is already printed */
221 /* race condition here: dir_changed could be set before we
222 * enter the poll, and we'd never notice if it weren't for the
224 ret = poll(pollarray, pollsize, POLL_MILLISECS);
228 "WARNING: error return from poll\n");
229 } else if (ret == 0) {
231 } else { /* ret > 0 */
232 scan_poll_results(ret);