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));
87 DEBUG(DEBUG_WARNING,("end external trace: %s\n", cmd));
94 int ctdb_parse_address(struct ctdb_context *ctdb,
95 TALLOC_CTX *mem_ctx, const char *str,
96 struct ctdb_address *address)
101 se = getservbyname("ctdb", "tcp");
104 address->address = talloc_strdup(mem_ctx, str);
105 CTDB_NO_MEMORY(ctdb, address->address);
108 address->port = CTDB_PORT;
110 address->port = ntohs(se->s_port);
117 check if two addresses are the same
119 bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
121 return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
126 hash function for mapping data to a VNN - taken from tdb
128 uint32_t ctdb_hash(const TDB_DATA *key)
130 return tdb_jenkins_hash(discard_const(key));
134 a type checking varient of idr_find
136 static void *_idr_find_type(struct idr_context *idp, int id, const char *type, const char *location)
138 void *p = idr_find(idp, id);
139 if (p && talloc_check_name(p, type) == NULL) {
140 DEBUG(DEBUG_ERR,("%s idr_find_type expected type %s but got %s\n",
141 location, type, talloc_get_name(p)));
147 uint32_t ctdb_reqid_new(struct ctdb_context *ctdb, void *state)
149 int id = idr_get_new_above(ctdb->idr, state, ctdb->lastid+1, INT_MAX);
151 DEBUG(DEBUG_DEBUG, ("Reqid wrap!\n"));
152 id = idr_get_new(ctdb->idr, state, INT_MAX);
158 void *_ctdb_reqid_find(struct ctdb_context *ctdb, uint32_t reqid, const char *type, const char *location)
162 p = _idr_find_type(ctdb->idr, reqid, type, location);
164 DEBUG(DEBUG_WARNING, ("Could not find idr:%u\n",reqid));
171 void ctdb_reqid_remove(struct ctdb_context *ctdb, uint32_t reqid)
175 ret = idr_remove(ctdb->idr, reqid);
177 DEBUG(DEBUG_ERR, ("Removing idr that does not exist\n"));
183 form a ctdb_rec_data record from a key/data pair
185 note that header may be NULL. If not NULL then it is included in the data portion
188 struct ctdb_rec_data *ctdb_marshall_record(TALLOC_CTX *mem_ctx, uint32_t reqid,
190 struct ctdb_ltdb_header *header,
194 struct ctdb_rec_data *d;
196 length = offsetof(struct ctdb_rec_data, data) + key.dsize +
197 data.dsize + (header?sizeof(*header):0);
198 d = (struct ctdb_rec_data *)talloc_size(mem_ctx, length);
204 d->keylen = key.dsize;
205 memcpy(&d->data[0], key.dptr, key.dsize);
207 d->datalen = data.dsize + sizeof(*header);
208 memcpy(&d->data[key.dsize], header, sizeof(*header));
209 memcpy(&d->data[key.dsize+sizeof(*header)], data.dptr, data.dsize);
211 d->datalen = data.dsize;
212 memcpy(&d->data[key.dsize], data.dptr, data.dsize);
218 /* helper function for marshalling multiple records */
219 struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx,
220 struct ctdb_marshall_buffer *m,
224 struct ctdb_ltdb_header *header,
227 struct ctdb_rec_data *r;
228 size_t m_size, r_size;
229 struct ctdb_marshall_buffer *m2;
231 r = ctdb_marshall_record(mem_ctx, reqid, key, header, data);
238 m = talloc_zero_size(mem_ctx, offsetof(struct ctdb_marshall_buffer, data));
245 m_size = talloc_get_size(m);
246 r_size = talloc_get_size(r);
248 m2 = talloc_realloc_size(mem_ctx, m, m_size + r_size);
254 memcpy(m_size + (uint8_t *)m2, r, r_size);
263 /* we've finished marshalling, return a data blob with the marshalled records */
264 TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
267 data.dptr = (uint8_t *)m;
268 data.dsize = talloc_get_size(m);
273 loop over a marshalling buffer
275 - pass r==NULL to start
276 - loop the number of times indicated by m->count
278 struct ctdb_rec_data *ctdb_marshall_loop_next(struct ctdb_marshall_buffer *m, struct ctdb_rec_data *r,
280 struct ctdb_ltdb_header *header,
281 TDB_DATA *key, TDB_DATA *data)
284 r = (struct ctdb_rec_data *)&m->data[0];
286 r = (struct ctdb_rec_data *)(r->length + (uint8_t *)r);
294 key->dptr = &r->data[0];
295 key->dsize = r->keylen;
298 data->dptr = &r->data[r->keylen];
299 data->dsize = r->datalen;
300 if (header != NULL) {
301 data->dptr += sizeof(*header);
302 data->dsize -= sizeof(*header);
306 if (header != NULL) {
307 if (r->datalen < sizeof(*header)) {
310 *header = *(struct ctdb_ltdb_header *)&r->data[r->keylen];
317 This is used to canonicalize a ctdb_sock_addr structure.
319 void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip)
321 char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
323 memcpy(cip, ip, sizeof (*cip));
325 if ( (ip->sa.sa_family == AF_INET6)
326 && !memcmp(&ip->ip6.sin6_addr, prefix, 12)) {
327 memset(cip, 0, sizeof(*cip));
328 #ifdef HAVE_SOCK_SIN_LEN
329 cip->ip.sin_len = sizeof(*cip);
331 cip->ip.sin_family = AF_INET;
332 cip->ip.sin_port = ip->ip6.sin6_port;
333 memcpy(&cip->ip.sin_addr, &ip->ip6.sin6_addr.s6_addr[12], 4);
337 bool ctdb_same_ip(const ctdb_sock_addr *tip1, const ctdb_sock_addr *tip2)
339 ctdb_sock_addr ip1, ip2;
341 ctdb_canonicalize_ip(tip1, &ip1);
342 ctdb_canonicalize_ip(tip2, &ip2);
344 if (ip1.sa.sa_family != ip2.sa.sa_family) {
348 switch (ip1.sa.sa_family) {
350 return ip1.ip.sin_addr.s_addr == ip2.ip.sin_addr.s_addr;
352 return !memcmp(&ip1.ip6.sin6_addr.s6_addr[0],
353 &ip2.ip6.sin6_addr.s6_addr[0],
356 DEBUG(DEBUG_ERR, (__location__ " CRITICAL Can not compare sockaddr structures of type %u\n", ip1.sa.sa_family));
364 compare two ctdb_sock_addr structures
366 bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2)
368 return ctdb_same_ip(ip1, ip2) && ip1->ip.sin_port == ip2->ip.sin_port;
371 char *ctdb_addr_to_str(ctdb_sock_addr *addr)
373 static char cip[128] = "";
375 switch (addr->sa.sa_family) {
377 inet_ntop(addr->ip.sin_family, &addr->ip.sin_addr, cip, sizeof(cip));
380 inet_ntop(addr->ip6.sin6_family, &addr->ip6.sin6_addr, cip, sizeof(cip));
383 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
384 ctdb_external_trace();
390 unsigned ctdb_addr_to_port(ctdb_sock_addr *addr)
392 switch (addr->sa.sa_family) {
394 return ntohs(addr->ip.sin_port);
397 return ntohs(addr->ip6.sin6_port);
400 DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
407 const char *ctdb_eventscript_call_names[] = {
424 /* Runstate handling */
426 enum ctdb_runstate runstate;
429 { CTDB_RUNSTATE_UNKNOWN, "UNKNOWN" },
430 { CTDB_RUNSTATE_INIT, "INIT" },
431 { CTDB_RUNSTATE_SETUP, "SETUP" },
432 { CTDB_RUNSTATE_FIRST_RECOVERY, "FIRST_RECOVERY" },
433 { CTDB_RUNSTATE_STARTUP, "STARTUP" },
434 { CTDB_RUNSTATE_RUNNING, "RUNNING" },
435 { CTDB_RUNSTATE_SHUTDOWN, "SHUTDOWN" },
439 const char *runstate_to_string(enum ctdb_runstate runstate)
442 for (i=0; runstate_map[i].label != NULL ; i++) {
443 if (runstate_map[i].runstate == runstate) {
444 return runstate_map[i].label;
448 return runstate_map[0].label;
451 enum ctdb_runstate runstate_from_string(const char *label)
454 for (i=0; runstate_map[i].label != NULL; i++) {
455 if (strcasecmp(runstate_map[i].label, label) == 0) {
456 return runstate_map[i].runstate;
460 return CTDB_RUNSTATE_UNKNOWN;
463 void ctdb_set_runstate(struct ctdb_context *ctdb, enum ctdb_runstate runstate)
465 if (runstate <= ctdb->runstate) {
466 ctdb_fatal(ctdb, "runstate must always increase");
469 DEBUG(DEBUG_NOTICE,("Set runstate to %s (%d)\n",
470 runstate_to_string(runstate), runstate));
471 ctdb->runstate = runstate;
474 void ctdb_mkdir_p_or_die(struct ctdb_context *ctdb, const char *dir, int mode)
478 ret = mkdir_p(dir, mode);
481 ("ctdb exiting with error: "
482 "failed to create directory \"%s\" (%s)\n",
483 dir, strerror(errno)));