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 /* Invoke an external program to do some sort of tracing on the CTDB
68 * process. This might block for a little while. The external
69 * program is specified by the environment variable
70 * CTDB_EXTERNAL_TRACE. This program should take one argument: the
71 * pid of the process to trace. Commonly, the program would be a
72 * wrapper script around gcore.
74 void ctdb_external_trace(void)
77 const char * t = getenv("CTDB_EXTERNAL_TRACE");
84 cmd = talloc_asprintf(NULL, "%s %lu", t, (unsigned long) getpid());
85 DEBUG(DEBUG_WARNING,("begin external trace: %s\n", cmd));
89 ("external trace command \"%s\" failed\n", cmd));
91 DEBUG(DEBUG_WARNING,("end external trace: %s\n", cmd));
98 int ctdb_parse_address(struct ctdb_context *ctdb,
99 TALLOC_CTX *mem_ctx, const char *str,
100 struct ctdb_address *address)
105 se = getservbyname("ctdb", "tcp");
108 address->address = talloc_strdup(mem_ctx, str);
109 CTDB_NO_MEMORY(ctdb, address->address);
112 address->port = CTDB_PORT;
114 address->port = ntohs(se->s_port);
121 check if two addresses are the same
123 bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
125 return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
130 hash function for mapping data to a VNN - taken from tdb
132 uint32_t ctdb_hash(const TDB_DATA *key)
134 return tdb_jenkins_hash(discard_const(key));
138 a type checking varient of idr_find
140 static void *_idr_find_type(struct idr_context *idp, int id, const char *type, const char *location)
142 void *p = idr_find(idp, id);
143 if (p && talloc_check_name(p, type) == NULL) {
144 DEBUG(DEBUG_ERR,("%s idr_find_type expected type %s but got %s\n",
145 location, type, talloc_get_name(p)));
151 uint32_t ctdb_reqid_new(struct ctdb_context *ctdb, void *state)
153 int id = idr_get_new_above(ctdb->idr, state, ctdb->lastid+1, INT_MAX);
155 DEBUG(DEBUG_DEBUG, ("Reqid wrap!\n"));
156 id = idr_get_new(ctdb->idr, state, INT_MAX);
162 void *_ctdb_reqid_find(struct ctdb_context *ctdb, uint32_t reqid, const char *type, const char *location)
166 p = _idr_find_type(ctdb->idr, reqid, type, location);
168 DEBUG(DEBUG_WARNING, ("Could not find idr:%u\n",reqid));
175 void ctdb_reqid_remove(struct ctdb_context *ctdb, uint32_t reqid)
179 ret = idr_remove(ctdb->idr, reqid);
181 DEBUG(DEBUG_ERR, ("Removing idr that does not exist\n"));
186 static uint32_t ctdb_marshall_record_size(TDB_DATA key,
187 struct ctdb_ltdb_header *header,
190 return offsetof(struct ctdb_rec_data, data) + key.dsize +
191 data.dsize + (header ? sizeof(*header) : 0);
194 static void ctdb_marshall_record_copy(struct ctdb_rec_data *rec,
197 struct ctdb_ltdb_header *header,
203 rec->length = length;
205 rec->keylen = key.dsize;
206 memcpy(&rec->data[0], key.dptr, key.dsize);
210 rec->datalen = data.dsize + sizeof(*header);
211 memcpy(&rec->data[offset], header, sizeof(*header));
212 offset += sizeof(*header);
214 rec->datalen = data.dsize;
216 memcpy(&rec->data[offset], data.dptr, data.dsize);
220 form a ctdb_rec_data record from a key/data pair
222 note that header may be NULL. If not NULL then it is included in the data portion
225 struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid,
227 struct ctdb_ltdb_header *header,
231 struct ctdb_rec_data *d;
233 length = ctdb_marshall_record_size(key, header, data);
235 d = (struct ctdb_rec_data *)talloc_size(mem_ctx, length);
240 ctdb_marshall_record_copy(d, reqid, key, header, data, length);
245 /* helper function for marshalling multiple records */
246 struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx,
247 struct ctdb_marshall_buffer *m,
251 struct ctdb_ltdb_header *header,
254 struct ctdb_rec_data *r;
255 struct ctdb_marshall_buffer *m2;
256 uint32_t length, offset;
258 length = ctdb_marshall_record_size(key, header, data);
261 offset = offsetof(struct ctdb_marshall_buffer, data);
262 m2 = talloc_zero_size(mem_ctx, offset + length);
264 offset = talloc_get_size(m);
265 m2 = talloc_realloc_size(mem_ctx, m, offset + length);
276 r = (struct ctdb_rec_data *)((uint8_t *)m2 + offset);
277 ctdb_marshall_record_copy(r, reqid, key, header, data, length);
283 /* we've finished marshalling, return a data blob with the marshalled records */
284 TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
287 data.dptr = (uint8_t *)m;
288 data.dsize = talloc_get_size(m);
293 loop over a marshalling buffer
295 - pass r==NULL to start
296 - loop the number of times indicated by m->count
298 struct ctdb_rec_data *ctdb_marshall_loop_next(struct ctdb_marshall_buffer *m, struct ctdb_rec_data *r,
300 struct ctdb_ltdb_header *header,
301 TDB_DATA *key, TDB_DATA *data)
304 r = (struct ctdb_rec_data *)&m->data[0];
306 r = (struct ctdb_rec_data *)(r->length + (uint8_t *)r);
314 key->dptr = &r->data[0];
315 key->dsize = r->keylen;
318 data->dptr = &r->data[r->keylen];
319 data->dsize = r->datalen;
320 if (header != NULL) {
321 data->dptr += sizeof(*header);
322 data->dsize -= sizeof(*header);
326 if (header != NULL) {
327 if (r->datalen < sizeof(*header)) {
330 memcpy(header, &r->data[r->keylen], sizeof(*header));
337 This is used to canonicalize a ctdb_sock_addr structure.
339 void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip)
341 char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
343 memcpy(cip, ip, sizeof (*cip));
345 if ( (ip->sa.sa_family == AF_INET6)
346 && !memcmp(&ip->ip6.sin6_addr, prefix, 12)) {
347 memset(cip, 0, sizeof(*cip));
348 #ifdef HAVE_SOCK_SIN_LEN
349 cip->ip.sin_len = sizeof(*cip);
351 cip->ip.sin_family = AF_INET;
352 cip->ip.sin_port = ip->ip6.sin6_port;
353 memcpy(&cip->ip.sin_addr, &ip->ip6.sin6_addr.s6_addr[12], 4);
357 bool ctdb_same_ip(const ctdb_sock_addr *tip1, const ctdb_sock_addr *tip2)
359 ctdb_sock_addr ip1, ip2;
361 ctdb_canonicalize_ip(tip1, &ip1);
362 ctdb_canonicalize_ip(tip2, &ip2);
364 if (ip1.sa.sa_family != ip2.sa.sa_family) {
368 switch (ip1.sa.sa_family) {
370 return ip1.ip.sin_addr.s_addr == ip2.ip.sin_addr.s_addr;
372 return !memcmp(&ip1.ip6.sin6_addr.s6_addr[0],
373 &ip2.ip6.sin6_addr.s6_addr[0],
376 DEBUG(DEBUG_ERR, (__location__ " CRITICAL Can not compare sockaddr structures of type %u\n", ip1.sa.sa_family));
384 compare two ctdb_sock_addr structures
386 bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2)
388 return ctdb_same_ip(ip1, ip2) && ip1->ip.sin_port == ip2->ip.sin_port;
391 char *ctdb_addr_to_str(ctdb_sock_addr *addr)
393 static char cip[128] = "";
395 switch (addr->sa.sa_family) {
397 inet_ntop(addr->ip.sin_family, &addr->ip.sin_addr, cip, sizeof(cip));
400 inet_ntop(addr->ip6.sin6_family, &addr->ip6.sin6_addr, cip, sizeof(cip));
403 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
404 ctdb_external_trace();
410 unsigned ctdb_addr_to_port(ctdb_sock_addr *addr)
412 switch (addr->sa.sa_family) {
414 return ntohs(addr->ip.sin_port);
417 return ntohs(addr->ip6.sin6_port);
420 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
427 const char *ctdb_eventscript_call_names[] = {
444 /* Runstate handling */
446 enum ctdb_runstate runstate;
449 { CTDB_RUNSTATE_UNKNOWN, "UNKNOWN" },
450 { CTDB_RUNSTATE_INIT, "INIT" },
451 { CTDB_RUNSTATE_SETUP, "SETUP" },
452 { CTDB_RUNSTATE_FIRST_RECOVERY, "FIRST_RECOVERY" },
453 { CTDB_RUNSTATE_STARTUP, "STARTUP" },
454 { CTDB_RUNSTATE_RUNNING, "RUNNING" },
455 { CTDB_RUNSTATE_SHUTDOWN, "SHUTDOWN" },
459 const char *runstate_to_string(enum ctdb_runstate runstate)
462 for (i=0; runstate_map[i].label != NULL ; i++) {
463 if (runstate_map[i].runstate == runstate) {
464 return runstate_map[i].label;
468 return runstate_map[0].label;
471 enum ctdb_runstate runstate_from_string(const char *label)
474 for (i=0; runstate_map[i].label != NULL; i++) {
475 if (strcasecmp(runstate_map[i].label, label) == 0) {
476 return runstate_map[i].runstate;
480 return CTDB_RUNSTATE_UNKNOWN;
483 void ctdb_set_runstate(struct ctdb_context *ctdb, enum ctdb_runstate runstate)
485 if (runstate <= ctdb->runstate) {
486 ctdb_fatal(ctdb, "runstate must always increase");
489 DEBUG(DEBUG_NOTICE,("Set runstate to %s (%d)\n",
490 runstate_to_string(runstate), runstate));
491 ctdb->runstate = runstate;
494 /* Convert arbitrary data to 4-byte boundary padded uint32 array */
495 uint32_t *ctdb_key_to_idkey(TALLOC_CTX *mem_ctx, TDB_DATA key)
497 uint32_t idkey_size, *k;
499 idkey_size = 1 + (key.dsize + sizeof(uint32_t)-1) / sizeof(uint32_t);
501 k = talloc_zero_array(mem_ctx, uint32_t, idkey_size);
507 memcpy(&k[1], key.dptr, key.dsize);