4 Copyright (C) Andrew Tridgell 2006
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "system/network.h"
23 #include "system/filesys.h"
24 #include "system/wait.h"
25 #include "../include/ctdb_private.h"
28 return error string for last error
30 const char *ctdb_errstr(struct ctdb_context *ctdb)
37 remember an error message
39 void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...)
42 talloc_free(ctdb->err_msg);
44 ctdb->err_msg = talloc_vasprintf(ctdb, fmt, ap);
45 DEBUG(DEBUG_ERR,("ctdb error: %s\n", ctdb->err_msg));
50 a fatal internal error occurred - no hope for recovery
52 void ctdb_fatal(struct ctdb_context *ctdb, const char *msg)
54 DEBUG(DEBUG_ALERT,("ctdb fatal error: %s\n", msg));
59 like ctdb_fatal() but a core/backtrace would not be useful
61 void ctdb_die(struct ctdb_context *ctdb, const char *msg)
63 DEBUG(DEBUG_ALERT,("ctdb exiting with error: %s\n", msg));
67 /* Set the path of a helper program from envvar, falling back to
68 * dir/file if envvar unset. type is a string to print in log
69 * messages. helper is assumed to point to a statically allocated
70 * array of size bytes, initialised to "". If file is NULL don't fall
71 * back if envvar is unset. If dir is NULL and envvar is unset (but
72 * file is not NULL) then this is an error. Returns true if helper is
73 * set, either previously or this time. */
74 bool ctdb_set_helper(const char *type, char *helper, size_t size,
76 const char *dir, const char *file)
81 if (helper[0] != '\0') {
88 if (strlen(t) >= size) {
90 ("Unable to set %s - path too long\n", type));
94 strncpy(helper, t, size);
95 } else if (file == NULL) {
97 } else if (dir == NULL) {
99 ("Unable to set %s - dir is NULL\n", type));
102 if (snprintf(helper, size, "%s/%s", dir, file) >= size) {
104 ("Unable to set %s - path too long\n", type));
109 if (stat(helper, &st) != 0) {
111 ("Unable to set %s \"%s\" - %s\n",
112 type, helper, strerror(errno)));
115 if (!(st.st_mode & S_IXUSR)) {
117 ("Unable to set %s \"%s\" - not executable\n",
123 ("Set %s to \"%s\"\n", type, helper));
127 /* Invoke an external program to do some sort of tracing on the CTDB
128 * process. This might block for a little while. The external
129 * program is specified by the environment variable
130 * CTDB_EXTERNAL_TRACE. This program should take one argument: the
131 * pid of the process to trace. Commonly, the program would be a
132 * wrapper script around gcore.
134 void ctdb_external_trace(void)
137 const char * t = getenv("CTDB_EXTERNAL_TRACE");
144 cmd = talloc_asprintf(NULL, "%s %lu", t, (unsigned long) getpid());
145 DEBUG(DEBUG_WARNING,("begin external trace: %s\n", cmd));
149 ("external trace command \"%s\" failed\n", cmd));
151 DEBUG(DEBUG_WARNING,("end external trace: %s\n", cmd));
158 int ctdb_parse_address(struct ctdb_context *ctdb,
159 TALLOC_CTX *mem_ctx, const char *str,
160 struct ctdb_address *address)
166 se = getservbyname("ctdb", "tcp");
169 /* Parse IP address and re-convert to string. This ensure correct
170 * string form for IPv6 addresses.
172 if (! parse_ip(str, NULL, 0, &addr)) {
176 address->address = talloc_strdup(mem_ctx, ctdb_addr_to_str(&addr));
177 CTDB_NO_MEMORY(ctdb, address->address);
180 address->port = CTDB_PORT;
182 address->port = ntohs(se->s_port);
189 check if two addresses are the same
191 bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
193 return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
198 hash function for mapping data to a VNN - taken from tdb
200 uint32_t ctdb_hash(const TDB_DATA *key)
202 return tdb_jenkins_hash(discard_const(key));
206 a type checking varient of idr_find
208 static void *_idr_find_type(struct idr_context *idp, int id, const char *type, const char *location)
210 void *p = idr_find(idp, id);
211 if (p && talloc_check_name(p, type) == NULL) {
212 DEBUG(DEBUG_ERR,("%s idr_find_type expected type %s but got %s\n",
213 location, type, talloc_get_name(p)));
219 uint32_t ctdb_reqid_new(struct ctdb_context *ctdb, void *state)
221 int id = idr_get_new_above(ctdb->idr, state, ctdb->lastid+1, INT_MAX);
223 DEBUG(DEBUG_DEBUG, ("Reqid wrap!\n"));
224 id = idr_get_new(ctdb->idr, state, INT_MAX);
230 void *_ctdb_reqid_find(struct ctdb_context *ctdb, uint32_t reqid, const char *type, const char *location)
234 p = _idr_find_type(ctdb->idr, reqid, type, location);
236 DEBUG(DEBUG_WARNING, ("Could not find idr:%u\n",reqid));
243 void ctdb_reqid_remove(struct ctdb_context *ctdb, uint32_t reqid)
247 ret = idr_remove(ctdb->idr, reqid);
249 DEBUG(DEBUG_ERR, ("Removing idr that does not exist\n"));
254 static uint32_t ctdb_marshall_record_size(TDB_DATA key,
255 struct ctdb_ltdb_header *header,
258 return offsetof(struct ctdb_rec_data, data) + key.dsize +
259 data.dsize + (header ? sizeof(*header) : 0);
262 static void ctdb_marshall_record_copy(struct ctdb_rec_data *rec,
265 struct ctdb_ltdb_header *header,
271 rec->length = length;
273 rec->keylen = key.dsize;
274 memcpy(&rec->data[0], key.dptr, key.dsize);
278 rec->datalen = data.dsize + sizeof(*header);
279 memcpy(&rec->data[offset], header, sizeof(*header));
280 offset += sizeof(*header);
282 rec->datalen = data.dsize;
284 memcpy(&rec->data[offset], data.dptr, data.dsize);
288 form a ctdb_rec_data record from a key/data pair
290 note that header may be NULL. If not NULL then it is included in the data portion
293 struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid,
295 struct ctdb_ltdb_header *header,
299 struct ctdb_rec_data *d;
301 length = ctdb_marshall_record_size(key, header, data);
303 d = (struct ctdb_rec_data *)talloc_size(mem_ctx, length);
308 ctdb_marshall_record_copy(d, reqid, key, header, data, length);
313 /* helper function for marshalling multiple records */
314 struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx,
315 struct ctdb_marshall_buffer *m,
319 struct ctdb_ltdb_header *header,
322 struct ctdb_rec_data *r;
323 struct ctdb_marshall_buffer *m2;
324 uint32_t length, offset;
326 length = ctdb_marshall_record_size(key, header, data);
329 offset = offsetof(struct ctdb_marshall_buffer, data);
330 m2 = talloc_zero_size(mem_ctx, offset + length);
332 offset = talloc_get_size(m);
333 m2 = talloc_realloc_size(mem_ctx, m, offset + length);
344 r = (struct ctdb_rec_data *)((uint8_t *)m2 + offset);
345 ctdb_marshall_record_copy(r, reqid, key, header, data, length);
351 /* we've finished marshalling, return a data blob with the marshalled records */
352 TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
355 data.dptr = (uint8_t *)m;
356 data.dsize = talloc_get_size(m);
361 loop over a marshalling buffer
363 - pass r==NULL to start
364 - loop the number of times indicated by m->count
366 struct ctdb_rec_data *ctdb_marshall_loop_next(struct ctdb_marshall_buffer *m, struct ctdb_rec_data *r,
368 struct ctdb_ltdb_header *header,
369 TDB_DATA *key, TDB_DATA *data)
372 r = (struct ctdb_rec_data *)&m->data[0];
374 r = (struct ctdb_rec_data *)(r->length + (uint8_t *)r);
382 key->dptr = &r->data[0];
383 key->dsize = r->keylen;
386 data->dptr = &r->data[r->keylen];
387 data->dsize = r->datalen;
388 if (header != NULL) {
389 data->dptr += sizeof(*header);
390 data->dsize -= sizeof(*header);
394 if (header != NULL) {
395 if (r->datalen < sizeof(*header)) {
398 memcpy(header, &r->data[r->keylen], sizeof(*header));
405 This is used to canonicalize a ctdb_sock_addr structure.
407 void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip)
409 char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
411 memcpy(cip, ip, sizeof (*cip));
413 if ( (ip->sa.sa_family == AF_INET6)
414 && !memcmp(&ip->ip6.sin6_addr, prefix, 12)) {
415 memset(cip, 0, sizeof(*cip));
416 #ifdef HAVE_SOCK_SIN_LEN
417 cip->ip.sin_len = sizeof(*cip);
419 cip->ip.sin_family = AF_INET;
420 cip->ip.sin_port = ip->ip6.sin6_port;
421 memcpy(&cip->ip.sin_addr, &ip->ip6.sin6_addr.s6_addr[12], 4);
425 bool ctdb_same_ip(const ctdb_sock_addr *tip1, const ctdb_sock_addr *tip2)
427 ctdb_sock_addr ip1, ip2;
429 ctdb_canonicalize_ip(tip1, &ip1);
430 ctdb_canonicalize_ip(tip2, &ip2);
432 if (ip1.sa.sa_family != ip2.sa.sa_family) {
436 switch (ip1.sa.sa_family) {
438 return ip1.ip.sin_addr.s_addr == ip2.ip.sin_addr.s_addr;
440 return !memcmp(&ip1.ip6.sin6_addr.s6_addr[0],
441 &ip2.ip6.sin6_addr.s6_addr[0],
444 DEBUG(DEBUG_ERR, (__location__ " CRITICAL Can not compare sockaddr structures of type %u\n", ip1.sa.sa_family));
452 compare two ctdb_sock_addr structures
454 bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2)
456 return ctdb_same_ip(ip1, ip2) && ip1->ip.sin_port == ip2->ip.sin_port;
459 char *ctdb_addr_to_str(ctdb_sock_addr *addr)
461 static char cip[128] = "";
463 switch (addr->sa.sa_family) {
465 inet_ntop(addr->ip.sin_family, &addr->ip.sin_addr, cip, sizeof(cip));
468 inet_ntop(addr->ip6.sin6_family, &addr->ip6.sin6_addr, cip, sizeof(cip));
471 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
472 ctdb_external_trace();
478 unsigned ctdb_addr_to_port(ctdb_sock_addr *addr)
480 switch (addr->sa.sa_family) {
482 return ntohs(addr->ip.sin_port);
485 return ntohs(addr->ip6.sin6_port);
488 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
495 const char *ctdb_eventscript_call_names[] = {
512 /* Runstate handling */
514 enum ctdb_runstate runstate;
517 { CTDB_RUNSTATE_UNKNOWN, "UNKNOWN" },
518 { CTDB_RUNSTATE_INIT, "INIT" },
519 { CTDB_RUNSTATE_SETUP, "SETUP" },
520 { CTDB_RUNSTATE_FIRST_RECOVERY, "FIRST_RECOVERY" },
521 { CTDB_RUNSTATE_STARTUP, "STARTUP" },
522 { CTDB_RUNSTATE_RUNNING, "RUNNING" },
523 { CTDB_RUNSTATE_SHUTDOWN, "SHUTDOWN" },
527 const char *runstate_to_string(enum ctdb_runstate runstate)
530 for (i=0; runstate_map[i].label != NULL ; i++) {
531 if (runstate_map[i].runstate == runstate) {
532 return runstate_map[i].label;
536 return runstate_map[0].label;
539 enum ctdb_runstate runstate_from_string(const char *label)
542 for (i=0; runstate_map[i].label != NULL; i++) {
543 if (strcasecmp(runstate_map[i].label, label) == 0) {
544 return runstate_map[i].runstate;
548 return CTDB_RUNSTATE_UNKNOWN;
551 void ctdb_set_runstate(struct ctdb_context *ctdb, enum ctdb_runstate runstate)
553 if (runstate <= ctdb->runstate) {
554 ctdb_fatal(ctdb, "runstate must always increase");
557 DEBUG(DEBUG_NOTICE,("Set runstate to %s (%d)\n",
558 runstate_to_string(runstate), runstate));
559 ctdb->runstate = runstate;
562 /* Convert arbitrary data to 4-byte boundary padded uint32 array */
563 uint32_t *ctdb_key_to_idkey(TALLOC_CTX *mem_ctx, TDB_DATA key)
565 uint32_t idkey_size, *k;
567 idkey_size = 1 + (key.dsize + sizeof(uint32_t)-1) / sizeof(uint32_t);
569 k = talloc_zero_array(mem_ctx, uint32_t, idkey_size);
575 memcpy(&k[1], key.dptr, key.dsize);