2 common system utilities
4 Copyright (C) Amitay Isaacs 2014
5 Copyright (C) Martin Schwenke 2014
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "system/filesys.h"
23 #include "system/shmem.h"
37 if possible, make this task real time
39 void set_scheduler(void)
42 #if HAVE_THREAD_SETSCHED
43 struct thrdentry64 te;
47 if (getthrds64(getpid(), &te, sizeof(te), &ti, 1) != 1) {
48 DEBUG(DEBUG_ERR, ("Unable to get thread information\n"));
52 if (thread_setsched(te.ti_tid, 0, SCHED_RR) == -1) {
53 DEBUG(DEBUG_ERR, ("Unable to set scheduler to SCHED_RR (%s)\n",
56 DEBUG(DEBUG_NOTICE, ("Set scheduler to SCHED_RR\n"));
60 #if HAVE_SCHED_SETSCHEDULER
65 if (sched_setscheduler(0, SCHED_FIFO, &p) == -1) {
66 DEBUG(DEBUG_CRIT,("Unable to set scheduler to SCHED_FIFO (%s)\n",
69 DEBUG(DEBUG_NOTICE,("Set scheduler to SCHED_FIFO\n"));
76 reset scheduler from real-time to normal scheduling
78 void reset_scheduler(void)
81 #if HAVE_THREAD_SETSCHED
82 struct thrdentry64 te;
86 if (getthrds64(getpid(), &te, sizeof(te), &ti, 1) != 1) {
87 DEBUG(DEBUG_ERR, ("Unable to get thread information\n"));
89 if (thread_setsched(te.ti_tid, 0, SCHED_OTHER) == -1) {
90 DEBUG(DEBUG_ERR, ("Unable to set scheduler to SCHED_OTHER\n"));
94 #if HAVE_SCHED_SETSCHEDULER
98 if (sched_setscheduler(0, SCHED_OTHER, &p) == -1) {
99 DEBUG(DEBUG_ERR, ("Unable to set scheduler to SCHED_OTHER\n"));
105 void set_nonblocking(int fd)
109 v = fcntl(fd, F_GETFL, 0);
111 DEBUG(DEBUG_WARNING, ("Failed to get file status flags - %s\n",
115 if (fcntl(fd, F_SETFL, v | O_NONBLOCK) == -1) {
116 DEBUG(DEBUG_WARNING, ("Failed to set non_blocking on fd - %s\n",
121 void set_close_on_exec(int fd)
125 v = fcntl(fd, F_GETFD, 0);
127 DEBUG(DEBUG_WARNING, ("Failed to get file descriptor flags - %s\n",
131 if (fcntl(fd, F_SETFD, v | FD_CLOEXEC) != 0) {
132 DEBUG(DEBUG_WARNING, ("Failed to set close_on_exec on fd - %s\n",
138 bool parse_ipv4(const char *s, unsigned port, struct sockaddr_in *sin)
140 sin->sin_family = AF_INET;
141 sin->sin_port = htons(port);
143 if (inet_pton(AF_INET, s, &sin->sin_addr) != 1) {
144 DEBUG(DEBUG_ERR, (__location__ " Failed to translate %s into sin_addr\n", s));
151 static bool parse_ipv6(const char *s, const char *ifaces, unsigned port, ctdb_sock_addr *saddr)
153 saddr->ip6.sin6_family = AF_INET6;
154 saddr->ip6.sin6_port = htons(port);
155 saddr->ip6.sin6_flowinfo = 0;
156 saddr->ip6.sin6_scope_id = 0;
158 if (inet_pton(AF_INET6, s, &saddr->ip6.sin6_addr) != 1) {
159 DEBUG(DEBUG_ERR, (__location__ " Failed to translate %s into sin6_addr\n", s));
163 if (ifaces && IN6_IS_ADDR_LINKLOCAL(&saddr->ip6.sin6_addr)) {
164 if (strchr(ifaces, ',')) {
165 DEBUG(DEBUG_ERR, (__location__ " Link local address %s "
166 "is specified for multiple ifaces %s\n",
170 saddr->ip6.sin6_scope_id = if_nametoindex(ifaces);
179 bool parse_ip(const char *addr, const char *ifaces, unsigned port, ctdb_sock_addr *saddr)
184 ZERO_STRUCTP(saddr); /* valgrind :-) */
186 /* now is this a ipv4 or ipv6 address ?*/
187 p = index(addr, ':');
189 ret = parse_ipv4(addr, port, &saddr->ip);
191 ret = parse_ipv6(addr, ifaces, port, saddr);
200 bool parse_ip_mask(const char *str, const char *ifaces, ctdb_sock_addr *addr, unsigned *mask)
203 char s[64]; /* Much longer than INET6_ADDRSTRLEN */
211 if (len >= sizeof(s)) {
212 DEBUG(DEBUG_ERR, ("Address %s is unreasonably long\n", str));
216 strncpy(s, str, len+1);
220 DEBUG(DEBUG_ERR, (__location__ " This addr: %s does not contain a mask\n", s));
224 *mask = strtoul(p+1, &endp, 10);
225 if (endp == NULL || *endp != 0) {
226 /* trailing garbage */
227 DEBUG(DEBUG_ERR, (__location__ " Trailing garbage after the mask in %s\n", s));
233 /* now is this a ipv4 or ipv6 address ?*/
234 ret = parse_ip(s, ifaces, 0, addr);
242 bool parse_ip_port(const char *addr, ctdb_sock_addr *saddr)
245 char s[64]; /* Much longer than INET6_ADDRSTRLEN */
252 if (len >= sizeof(s)) {
253 DEBUG(DEBUG_ERR, ("Address %s is unreasonably long\n", addr));
257 strncpy(s, addr, len+1);
261 DEBUG(DEBUG_ERR, (__location__ " This addr: %s does not contain a port number\n", s));
265 port = strtoul(p+1, &endp, 10);
266 if (endp == NULL || *endp != 0) {
267 /* trailing garbage */
268 DEBUG(DEBUG_ERR, (__location__ " Trailing garbage after the port in %s\n", s));
273 /* now is this a ipv4 or ipv6 address ?*/
274 ret = parse_ip(s, NULL, port, saddr);
279 /* we don't lock future pages here; it would increase the chance that
280 * we'd fail to mmap later on. */
281 void lockdown_memory(bool valgrinding)
283 #if defined(HAVE_MLOCKALL) && !defined(_AIX_)
284 /* Extra stack, please! */
286 memset(dummy, 0, sizeof(dummy));
292 /* Ignore when running in local daemons mode */
297 /* Avoid compiler optimizing out dummy. */
298 mlock(dummy, sizeof(dummy));
299 if (mlockall(MCL_CURRENT) != 0) {
300 DEBUG(DEBUG_WARNING,("Failed to lockdown memory: %s'\n",
306 int mkdir_p(const char *dir, int mode)
312 if (strcmp(dir, "/") == 0) {
316 if (strcmp(dir, ".") == 0) {
320 /* Try to create directory */
321 ret = mkdir(dir, mode);
322 /* Succeed if that worked or if it already existed */
323 if (ret == 0 || errno == EEXIST) {
326 /* Fail on anything else except ENOENT */
327 if (errno != ENOENT) {
331 /* Create ancestors */
333 if (len >= PATH_MAX) {
334 errno = ENAMETOOLONG;
337 strncpy(t, dir, len+1);
339 ret = mkdir_p(dirname(t), mode);
344 /* Create directory */
345 ret = mkdir(dir, mode);
346 if ((ret == -1) && (errno == EEXIST)) {
353 void mkdir_p_or_die(const char *dir, int mode)
357 ret = mkdir_p(dir, mode);
360 ("ctdb exiting with error: "
361 "failed to create directory \"%s\" (%s)\n",
362 dir, strerror(errno)));