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
62 int policy
= SCHED_FIFO
;
66 #ifdef SCHED_RESET_ON_FORK
67 policy
|= SCHED_RESET_ON_FORK
;
69 if (sched_setscheduler(0, policy
, &p
) == -1) {
70 DEBUG(DEBUG_CRIT
,("Unable to set scheduler to SCHED_FIFO (%s)\n",
73 DEBUG(DEBUG_NOTICE
,("Set scheduler to SCHED_FIFO\n"));
80 reset scheduler from real-time to normal scheduling
82 void reset_scheduler(void)
85 #if HAVE_THREAD_SETSCHED
86 struct thrdentry64 te
;
90 if (getthrds64(getpid(), &te
, sizeof(te
), &ti
, 1) != 1) {
91 DEBUG(DEBUG_ERR
, ("Unable to get thread information\n"));
93 if (thread_setsched(te
.ti_tid
, 0, SCHED_OTHER
) == -1) {
94 DEBUG(DEBUG_ERR
, ("Unable to set scheduler to SCHED_OTHER\n"));
98 #if HAVE_SCHED_SETSCHEDULER
99 #ifndef SCHED_RESET_ON_FORK
100 struct sched_param p
;
102 p
.sched_priority
= 0;
103 if (sched_setscheduler(0, SCHED_OTHER
, &p
) == -1) {
104 DEBUG(DEBUG_ERR
, ("Unable to set scheduler to SCHED_OTHER\n"));
111 void set_nonblocking(int fd
)
115 v
= fcntl(fd
, F_GETFL
, 0);
117 DEBUG(DEBUG_WARNING
, ("Failed to get file status flags - %s\n",
121 if (fcntl(fd
, F_SETFL
, v
| O_NONBLOCK
) == -1) {
122 DEBUG(DEBUG_WARNING
, ("Failed to set non_blocking on fd - %s\n",
127 void set_close_on_exec(int fd
)
131 v
= fcntl(fd
, F_GETFD
, 0);
133 DEBUG(DEBUG_WARNING
, ("Failed to get file descriptor flags - %s\n",
137 if (fcntl(fd
, F_SETFD
, v
| FD_CLOEXEC
) != 0) {
138 DEBUG(DEBUG_WARNING
, ("Failed to set close_on_exec on fd - %s\n",
144 bool parse_ipv4(const char *s
, unsigned port
, struct sockaddr_in
*sin
)
146 sin
->sin_family
= AF_INET
;
147 sin
->sin_port
= htons(port
);
149 if (inet_pton(AF_INET
, s
, &sin
->sin_addr
) != 1) {
150 DEBUG(DEBUG_ERR
, (__location__
" Failed to translate %s into sin_addr\n", s
));
157 static bool parse_ipv6(const char *s
, const char *ifaces
, unsigned port
, ctdb_sock_addr
*saddr
)
159 saddr
->ip6
.sin6_family
= AF_INET6
;
160 saddr
->ip6
.sin6_port
= htons(port
);
161 saddr
->ip6
.sin6_flowinfo
= 0;
162 saddr
->ip6
.sin6_scope_id
= 0;
164 if (inet_pton(AF_INET6
, s
, &saddr
->ip6
.sin6_addr
) != 1) {
165 DEBUG(DEBUG_ERR
, (__location__
" Failed to translate %s into sin6_addr\n", s
));
169 if (ifaces
&& IN6_IS_ADDR_LINKLOCAL(&saddr
->ip6
.sin6_addr
)) {
170 if (strchr(ifaces
, ',')) {
171 DEBUG(DEBUG_ERR
, (__location__
" Link local address %s "
172 "is specified for multiple ifaces %s\n",
176 saddr
->ip6
.sin6_scope_id
= if_nametoindex(ifaces
);
185 bool parse_ip(const char *addr
, const char *ifaces
, unsigned port
, ctdb_sock_addr
*saddr
)
190 ZERO_STRUCTP(saddr
); /* valgrind :-) */
192 /* now is this a ipv4 or ipv6 address ?*/
193 p
= index(addr
, ':');
195 ret
= parse_ipv4(addr
, port
, &saddr
->ip
);
197 ret
= parse_ipv6(addr
, ifaces
, port
, saddr
);
206 bool parse_ip_mask(const char *str
, const char *ifaces
, ctdb_sock_addr
*addr
, unsigned *mask
)
209 char s
[64]; /* Much longer than INET6_ADDRSTRLEN */
217 if (len
>= sizeof(s
)) {
218 DEBUG(DEBUG_ERR
, ("Address %s is unreasonably long\n", str
));
222 strncpy(s
, str
, len
+1);
226 DEBUG(DEBUG_ERR
, (__location__
" This addr: %s does not contain a mask\n", s
));
230 *mask
= strtoul(p
+1, &endp
, 10);
231 if (endp
== NULL
|| *endp
!= 0) {
232 /* trailing garbage */
233 DEBUG(DEBUG_ERR
, (__location__
" Trailing garbage after the mask in %s\n", s
));
239 /* now is this a ipv4 or ipv6 address ?*/
240 ret
= parse_ip(s
, ifaces
, 0, addr
);
248 bool parse_ip_port(const char *addr
, ctdb_sock_addr
*saddr
)
251 char s
[64]; /* Much longer than INET6_ADDRSTRLEN */
258 if (len
>= sizeof(s
)) {
259 DEBUG(DEBUG_ERR
, ("Address %s is unreasonably long\n", addr
));
263 strncpy(s
, addr
, len
+1);
267 DEBUG(DEBUG_ERR
, (__location__
" This addr: %s does not contain a port number\n", s
));
271 port
= strtoul(p
+1, &endp
, 10);
272 if (endp
== NULL
|| *endp
!= 0) {
273 /* trailing garbage */
274 DEBUG(DEBUG_ERR
, (__location__
" Trailing garbage after the port in %s\n", s
));
279 /* now is this a ipv4 or ipv6 address ?*/
280 ret
= parse_ip(s
, NULL
, port
, saddr
);
285 /* we don't lock future pages here; it would increase the chance that
286 * we'd fail to mmap later on. */
287 void lockdown_memory(bool valgrinding
)
289 #if defined(HAVE_MLOCKALL) && !defined(_AIX_)
290 /* Extra stack, please! */
292 memset(dummy
, 0, sizeof(dummy
));
298 /* Ignore when running in local daemons mode */
303 /* Avoid compiler optimizing out dummy. */
304 mlock(dummy
, sizeof(dummy
));
305 if (mlockall(MCL_CURRENT
) != 0) {
306 DEBUG(DEBUG_WARNING
,("Failed to lockdown memory: %s'\n",
312 int mkdir_p(const char *dir
, int mode
)
318 if (strcmp(dir
, "/") == 0) {
322 if (strcmp(dir
, ".") == 0) {
326 /* Try to create directory */
327 ret
= mkdir(dir
, mode
);
328 /* Succeed if that worked or if it already existed */
329 if (ret
== 0 || errno
== EEXIST
) {
332 /* Fail on anything else except ENOENT */
333 if (errno
!= ENOENT
) {
337 /* Create ancestors */
339 if (len
>= PATH_MAX
) {
340 errno
= ENAMETOOLONG
;
343 strncpy(t
, dir
, len
+1);
345 ret
= mkdir_p(dirname(t
), mode
);
350 /* Create directory */
351 ret
= mkdir(dir
, mode
);
352 if ((ret
== -1) && (errno
== EEXIST
)) {
359 void mkdir_p_or_die(const char *dir
, int mode
)
363 ret
= mkdir_p(dir
, mode
);
366 ("ctdb exiting with error: "
367 "failed to create directory \"%s\" (%s)\n",
368 dir
, strerror(errno
)));