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-rw-r--r--ctdb/common/ctdb_util.c674
1 files changed, 674 insertions, 0 deletions
diff --git a/ctdb/common/ctdb_util.c b/ctdb/common/ctdb_util.c
new file mode 100644
index 0000000..3f8fff9
--- /dev/null
+++ b/ctdb/common/ctdb_util.c
@@ -0,0 +1,674 @@
+/*
+ ctdb utility code
+
+ Copyright (C) Andrew Tridgell 2006
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include "system/wait.h"
+
+#include <tdb.h>
+
+#include "lib/util/debug.h"
+#include "lib/util/samba_util.h"
+
+#include "ctdb_private.h"
+
+#include "protocol/protocol_util.h"
+
+#include "common/reqid.h"
+#include "common/system.h"
+#include "common/common.h"
+#include "common/logging.h"
+
+/*
+ return error string for last error
+*/
+const char *ctdb_errstr(struct ctdb_context *ctdb)
+{
+ return ctdb->err_msg;
+}
+
+
+/*
+ remember an error message
+*/
+void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...)
+{
+ va_list ap;
+ talloc_free(ctdb->err_msg);
+ va_start(ap, fmt);
+ ctdb->err_msg = talloc_vasprintf(ctdb, fmt, ap);
+ DEBUG(DEBUG_ERR,("ctdb error: %s\n", ctdb->err_msg));
+ va_end(ap);
+}
+
+/*
+ a fatal internal error occurred - no hope for recovery
+*/
+void ctdb_fatal(struct ctdb_context *ctdb, const char *msg)
+{
+ DEBUG(DEBUG_ALERT,("ctdb fatal error: %s\n", msg));
+ abort();
+}
+
+/*
+ like ctdb_fatal() but a core/backtrace would not be useful
+*/
+void ctdb_die(struct ctdb_context *ctdb, const char *msg)
+{
+ DEBUG(DEBUG_ALERT,("ctdb exiting with error: %s\n", msg));
+ exit(1);
+}
+
+/* Set the path of a helper program from envvar, falling back to
+ * dir/file if envvar unset. type is a string to print in log
+ * messages. helper is assumed to point to a statically allocated
+ * array of size bytes, initialised to "". If file is NULL don't fall
+ * back if envvar is unset. If dir is NULL and envvar is unset (but
+ * file is not NULL) then this is an error. Returns true if helper is
+ * set, either previously or this time. */
+bool ctdb_set_helper(const char *type, char *helper, size_t size,
+ const char *envvar,
+ const char *dir, const char *file)
+{
+ const char *t;
+ struct stat st;
+
+ if (helper[0] != '\0') {
+ /* Already set */
+ return true;
+ }
+
+ t = getenv(envvar);
+ if (t != NULL) {
+ if (strlen(t) >= size) {
+ DEBUG(DEBUG_ERR,
+ ("Unable to set %s - path too long\n", type));
+ return false;
+ }
+
+ strncpy(helper, t, size);
+ } else if (file == NULL) {
+ return false;
+ } else if (dir == NULL) {
+ DEBUG(DEBUG_ERR,
+ ("Unable to set %s - dir is NULL\n", type));
+ return false;
+ } else {
+ int ret;
+
+ ret = snprintf(helper, size, "%s/%s", dir, file);
+ if (ret < 0 || (size_t)ret >= size) {
+ DEBUG(DEBUG_ERR,
+ ("Unable to set %s - path too long\n", type));
+ return false;
+ }
+ }
+
+ if (stat(helper, &st) != 0) {
+ DEBUG(DEBUG_ERR,
+ ("Unable to set %s \"%s\" - %s\n",
+ type, helper, strerror(errno)));
+ return false;
+ }
+ if (!(st.st_mode & S_IXUSR)) {
+ DEBUG(DEBUG_ERR,
+ ("Unable to set %s \"%s\" - not executable\n",
+ type, helper));
+ return false;
+ }
+
+ DEBUG(DEBUG_NOTICE,
+ ("Set %s to \"%s\"\n", type, helper));
+ return true;
+}
+
+/*
+ parse a IP:port pair
+*/
+int ctdb_parse_address(TALLOC_CTX *mem_ctx, const char *str,
+ ctdb_sock_addr *address)
+{
+ struct servent *se;
+ int port;
+ int ret;
+
+ setservent(0);
+ se = getservbyname("ctdb", "tcp");
+ endservent();
+
+ if (se == NULL) {
+ port = CTDB_PORT;
+ } else {
+ port = ntohs(se->s_port);
+ }
+
+ ret = ctdb_sock_addr_from_string(str, address, false);
+ if (ret != 0) {
+ return -1;
+ }
+ ctdb_sock_addr_set_port(address, port);
+
+ return 0;
+}
+
+
+/*
+ check if two addresses are the same
+*/
+bool ctdb_same_address(ctdb_sock_addr *a1, ctdb_sock_addr *a2)
+{
+ return ctdb_same_ip(a1, a2) &&
+ ctdb_addr_to_port(a1) == ctdb_addr_to_port(a2);
+}
+
+
+/*
+ hash function for mapping data to a VNN - taken from tdb
+*/
+uint32_t ctdb_hash(const TDB_DATA *key)
+{
+ return tdb_jenkins_hash(discard_const(key));
+}
+
+
+static uint32_t ctdb_marshall_record_size(TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA data)
+{
+ return offsetof(struct ctdb_rec_data_old, data) + key.dsize +
+ data.dsize + (header ? sizeof(*header) : 0);
+}
+
+static void ctdb_marshall_record_copy(struct ctdb_rec_data_old *rec,
+ uint32_t reqid,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA data,
+ uint32_t length)
+{
+ uint32_t offset;
+
+ rec->length = length;
+ rec->reqid = reqid;
+ rec->keylen = key.dsize;
+ memcpy(&rec->data[0], key.dptr, key.dsize);
+ offset = key.dsize;
+
+ if (header) {
+ rec->datalen = data.dsize + sizeof(*header);
+ memcpy(&rec->data[offset], header, sizeof(*header));
+ offset += sizeof(*header);
+ } else {
+ rec->datalen = data.dsize;
+ }
+ memcpy(&rec->data[offset], data.dptr, data.dsize);
+}
+
+/*
+ form a ctdb_rec_data record from a key/data pair
+
+ note that header may be NULL. If not NULL then it is included in the data portion
+ of the record
+ */
+struct ctdb_rec_data_old *ctdb_marshall_record(TALLOC_CTX *mem_ctx,
+ uint32_t reqid,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA data)
+{
+ size_t length;
+ struct ctdb_rec_data_old *d;
+
+ length = ctdb_marshall_record_size(key, header, data);
+
+ d = (struct ctdb_rec_data_old *)talloc_size(mem_ctx, length);
+ if (d == NULL) {
+ return NULL;
+ }
+
+ ctdb_marshall_record_copy(d, reqid, key, header, data, length);
+ return d;
+}
+
+
+/* helper function for marshalling multiple records */
+struct ctdb_marshall_buffer *ctdb_marshall_add(TALLOC_CTX *mem_ctx,
+ struct ctdb_marshall_buffer *m,
+ uint32_t db_id,
+ uint32_t reqid,
+ TDB_DATA key,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA data)
+{
+ struct ctdb_rec_data_old *r;
+ struct ctdb_marshall_buffer *m2;
+ uint32_t length, offset;
+
+ length = ctdb_marshall_record_size(key, header, data);
+
+ if (m == NULL) {
+ offset = offsetof(struct ctdb_marshall_buffer, data);
+ m2 = talloc_zero_size(mem_ctx, offset + length);
+ } else {
+ offset = talloc_get_size(m);
+ m2 = talloc_realloc_size(mem_ctx, m, offset + length);
+ }
+ if (m2 == NULL) {
+ TALLOC_FREE(m);
+ return NULL;
+ }
+
+ if (m == NULL) {
+ m2->db_id = db_id;
+ }
+
+ r = (struct ctdb_rec_data_old *)((uint8_t *)m2 + offset);
+ ctdb_marshall_record_copy(r, reqid, key, header, data, length);
+ m2->count++;
+
+ return m2;
+}
+
+/* we've finished marshalling, return a data blob with the marshalled records */
+TDB_DATA ctdb_marshall_finish(struct ctdb_marshall_buffer *m)
+{
+ TDB_DATA data;
+ data.dptr = (uint8_t *)m;
+ data.dsize = talloc_get_size(m);
+ return data;
+}
+
+/*
+ loop over a marshalling buffer
+
+ - pass r==NULL to start
+ - loop the number of times indicated by m->count
+*/
+struct ctdb_rec_data_old *ctdb_marshall_loop_next(
+ struct ctdb_marshall_buffer *m,
+ struct ctdb_rec_data_old *r,
+ uint32_t *reqid,
+ struct ctdb_ltdb_header *header,
+ TDB_DATA *key, TDB_DATA *data)
+{
+ if (r == NULL) {
+ r = (struct ctdb_rec_data_old *)&m->data[0];
+ } else {
+ r = (struct ctdb_rec_data_old *)(r->length + (uint8_t *)r);
+ }
+
+ if (reqid != NULL) {
+ *reqid = r->reqid;
+ }
+
+ if (key != NULL) {
+ key->dptr = &r->data[0];
+ key->dsize = r->keylen;
+ }
+ if (data != NULL) {
+ data->dptr = &r->data[r->keylen];
+ data->dsize = r->datalen;
+ if (header != NULL) {
+ data->dptr += sizeof(*header);
+ data->dsize -= sizeof(*header);
+ }
+ }
+
+ if (header != NULL) {
+ if (r->datalen < sizeof(*header)) {
+ return NULL;
+ }
+ memcpy(header, &r->data[r->keylen], sizeof(*header));
+ }
+
+ return r;
+}
+
+/*
+ This is used to canonicalize a ctdb_sock_addr structure.
+*/
+void ctdb_canonicalize_ip(const ctdb_sock_addr *ip, ctdb_sock_addr *cip)
+{
+ ZERO_STRUCTP(cip);
+
+ if (ip->sa.sa_family == AF_INET6) {
+ const char prefix[12] = { 0,0,0,0,0,0,0,0,0,0,0xff,0xff };
+ if (memcmp(&ip->ip6.sin6_addr, prefix, sizeof(prefix)) == 0) {
+ /* Copy IPv4-mapped IPv6 addresses as IPv4 */
+ cip->ip.sin_family = AF_INET;
+#ifdef HAVE_SOCK_SIN_LEN
+ cip->ip.sin_len = sizeof(ctdb_sock_addr);
+#endif
+ cip->ip.sin_port = ip->ip6.sin6_port;
+ memcpy(&cip->ip.sin_addr,
+ &ip->ip6.sin6_addr.s6_addr[12],
+ sizeof(cip->ip.sin_addr));
+ } else {
+ cip->ip6.sin6_family = AF_INET6;
+#ifdef HAVE_SOCK_SIN6_LEN
+ cip->ip6.sin6_len = sizeof(ctdb_sock_addr);
+#endif
+ cip->ip6.sin6_port = ip->ip6.sin6_port;
+ memcpy(&cip->ip6.sin6_addr,
+ &ip->ip6.sin6_addr,
+ sizeof(cip->ip6.sin6_addr));
+ }
+
+ return;
+ }
+
+ if (ip->sa.sa_family == AF_INET) {
+ cip->ip.sin_family = AF_INET;
+#ifdef HAVE_SOCK_SIN_LEN
+ cip->ip.sin_len = sizeof(ctdb_sock_addr);
+#endif
+ cip->ip.sin_port = ip->ip.sin_port;
+ memcpy(&cip->ip.sin_addr,
+ &ip->ip.sin_addr,
+ sizeof(ip->ip.sin_addr));
+
+ return;
+ }
+}
+
+bool ctdb_same_ip(const ctdb_sock_addr *tip1, const ctdb_sock_addr *tip2)
+{
+ ctdb_sock_addr ip1, ip2;
+
+ ctdb_canonicalize_ip(tip1, &ip1);
+ ctdb_canonicalize_ip(tip2, &ip2);
+
+ if (ip1.sa.sa_family != ip2.sa.sa_family) {
+ return false;
+ }
+
+ switch (ip1.sa.sa_family) {
+ case AF_INET:
+ return ip1.ip.sin_addr.s_addr == ip2.ip.sin_addr.s_addr;
+ case AF_INET6:
+ return !memcmp(&ip1.ip6.sin6_addr.s6_addr[0],
+ &ip2.ip6.sin6_addr.s6_addr[0],
+ 16);
+ default:
+ DEBUG(DEBUG_ERR, (__location__ " CRITICAL Can not compare sockaddr structures of type %u\n", ip1.sa.sa_family));
+ return false;
+ }
+
+ return true;
+}
+
+/*
+ compare two ctdb_sock_addr structures
+ */
+bool ctdb_same_sockaddr(const ctdb_sock_addr *ip1, const ctdb_sock_addr *ip2)
+{
+ return ctdb_same_ip(ip1, ip2) && ip1->ip.sin_port == ip2->ip.sin_port;
+}
+
+char *ctdb_addr_to_str(ctdb_sock_addr *addr)
+{
+ static char cip[128] = "";
+
+ switch (addr->sa.sa_family) {
+ case AF_INET:
+ inet_ntop(addr->ip.sin_family, &addr->ip.sin_addr, cip, sizeof(cip));
+ break;
+ case AF_INET6:
+ inet_ntop(addr->ip6.sin6_family, &addr->ip6.sin6_addr, cip, sizeof(cip));
+ break;
+ default:
+ DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
+ }
+
+ return cip;
+}
+
+unsigned ctdb_addr_to_port(ctdb_sock_addr *addr)
+{
+ switch (addr->sa.sa_family) {
+ case AF_INET:
+ return ntohs(addr->ip.sin_port);
+ break;
+ case AF_INET6:
+ return ntohs(addr->ip6.sin6_port);
+ break;
+ default:
+ DEBUG(DEBUG_ERR, (__location__ " ERROR, unknown family %u\n", addr->sa.sa_family));
+ }
+
+ return 0;
+}
+
+/* Add a node to a node map with given address and flags */
+static bool node_map_add(TALLOC_CTX *mem_ctx,
+ const char *nstr, uint32_t flags,
+ struct ctdb_node_map_old **node_map)
+{
+ ctdb_sock_addr addr;
+ uint32_t num;
+ size_t s;
+ struct ctdb_node_and_flags *n;
+
+ /* Might as well do this before trying to allocate memory */
+ if (ctdb_parse_address(mem_ctx, nstr, &addr) == -1) {
+ return false;
+ }
+
+ num = (*node_map)->num + 1;
+ s = offsetof(struct ctdb_node_map_old, nodes) +
+ num * sizeof(struct ctdb_node_and_flags);
+ *node_map = talloc_realloc_size(mem_ctx, *node_map, s);
+ if (*node_map == NULL) {
+ DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
+ return false;
+ }
+
+ n = &(*node_map)->nodes[(*node_map)->num];
+ n->addr = addr;
+ n->pnn = (*node_map)->num;
+ n->flags = flags;
+
+ (*node_map)->num++;
+
+ return true;
+}
+
+/* Read a nodes file into a node map */
+struct ctdb_node_map_old *ctdb_read_nodes_file(TALLOC_CTX *mem_ctx,
+ const char *nlist)
+{
+ char **lines;
+ int nlines;
+ int i;
+ struct ctdb_node_map_old *ret;
+
+ /* Allocate node map header */
+ ret = talloc_zero_size(mem_ctx, offsetof(struct ctdb_node_map_old, nodes));
+ if (ret == NULL) {
+ DEBUG(DEBUG_ERR, (__location__ " Out of memory\n"));
+ return false;
+ }
+
+ lines = file_lines_load(nlist, &nlines, 0, mem_ctx);
+ if (lines == NULL) {
+ DEBUG(DEBUG_ERR, ("Failed to read nodes file \"%s\"\n", nlist));
+ return false;
+ }
+ while (nlines > 0 && strcmp(lines[nlines-1], "") == 0) {
+ nlines--;
+ }
+
+ for (i=0; i < nlines; i++) {
+ char *node;
+ uint32_t flags;
+ size_t len;
+
+ node = lines[i];
+ /* strip leading spaces */
+ while((*node == ' ') || (*node == '\t')) {
+ node++;
+ }
+
+ len = strlen(node);
+
+ while ((len > 1) &&
+ ((node[len-1] == ' ') || (node[len-1] == '\t')))
+ {
+ node[len-1] = '\0';
+ len--;
+ }
+
+ if (len == 0) {
+ continue;
+ }
+ if (*node == '#') {
+ /* A "deleted" node is a node that is
+ commented out in the nodes file. This is
+ used instead of removing a line, which
+ would cause subsequent nodes to change
+ their PNN. */
+ flags = NODE_FLAGS_DELETED;
+ node = discard_const("0.0.0.0");
+ } else {
+ flags = 0;
+ }
+ if (!node_map_add(mem_ctx, node, flags, &ret)) {
+ talloc_free(lines);
+ TALLOC_FREE(ret);
+ return NULL;
+ }
+ }
+
+ talloc_free(lines);
+ return ret;
+}
+
+struct ctdb_node_map_old *
+ctdb_node_list_to_map(struct ctdb_node **nodes, uint32_t num_nodes,
+ TALLOC_CTX *mem_ctx)
+{
+ uint32_t i;
+ size_t size;
+ struct ctdb_node_map_old *node_map;
+
+ size = offsetof(struct ctdb_node_map_old, nodes) +
+ num_nodes * sizeof(struct ctdb_node_and_flags);
+ node_map = (struct ctdb_node_map_old *)talloc_zero_size(mem_ctx, size);
+ if (node_map == NULL) {
+ DEBUG(DEBUG_ERR,
+ (__location__ " Failed to allocate nodemap array\n"));
+ return NULL;
+ }
+
+ node_map->num = num_nodes;
+ for (i=0; i<num_nodes; i++) {
+ node_map->nodes[i].addr = nodes[i]->address;
+ node_map->nodes[i].pnn = nodes[i]->pnn;
+ node_map->nodes[i].flags = nodes[i]->flags;
+ }
+
+ return node_map;
+}
+
+const char *ctdb_eventscript_call_names[] = {
+ "init",
+ "setup",
+ "startup",
+ "startrecovery",
+ "recovered",
+ "takeip",
+ "releaseip",
+ "stopped",
+ "monitor",
+ "status",
+ "shutdown",
+ "reload",
+ "updateip",
+ "ipreallocated"
+};
+
+/* Runstate handling */
+static struct {
+ enum ctdb_runstate runstate;
+ const char * label;
+} runstate_map[] = {
+ { CTDB_RUNSTATE_UNKNOWN, "UNKNOWN" },
+ { CTDB_RUNSTATE_INIT, "INIT" },
+ { CTDB_RUNSTATE_SETUP, "SETUP" },
+ { CTDB_RUNSTATE_FIRST_RECOVERY, "FIRST_RECOVERY" },
+ { CTDB_RUNSTATE_STARTUP, "STARTUP" },
+ { CTDB_RUNSTATE_RUNNING, "RUNNING" },
+ { CTDB_RUNSTATE_SHUTDOWN, "SHUTDOWN" },
+ { -1, NULL },
+};
+
+const char *runstate_to_string(enum ctdb_runstate runstate)
+{
+ int i;
+ for (i=0; runstate_map[i].label != NULL ; i++) {
+ if (runstate_map[i].runstate == runstate) {
+ return runstate_map[i].label;
+ }
+ }
+
+ return runstate_map[0].label;
+}
+
+enum ctdb_runstate runstate_from_string(const char *label)
+{
+ int i;
+ for (i=0; runstate_map[i].label != NULL; i++) {
+ if (strcasecmp(runstate_map[i].label, label) == 0) {
+ return runstate_map[i].runstate;
+ }
+ }
+
+ return CTDB_RUNSTATE_UNKNOWN;
+}
+
+void ctdb_set_runstate(struct ctdb_context *ctdb, enum ctdb_runstate runstate)
+{
+ DEBUG(DEBUG_NOTICE,("Set runstate to %s (%d)\n",
+ runstate_to_string(runstate), runstate));
+
+ if (runstate <= ctdb->runstate) {
+ ctdb_fatal(ctdb, "runstate must always increase");
+ }
+
+ ctdb->runstate = runstate;
+}
+
+/* Convert arbitrary data to 4-byte boundary padded uint32 array */
+uint32_t *ctdb_key_to_idkey(TALLOC_CTX *mem_ctx, TDB_DATA key)
+{
+ uint32_t idkey_size, *k;
+
+ idkey_size = 1 + (key.dsize + sizeof(uint32_t)-1) / sizeof(uint32_t);
+
+ k = talloc_zero_array(mem_ctx, uint32_t, idkey_size);
+ if (k == NULL) {
+ return NULL;
+ }
+
+ k[0] = idkey_size;
+ memcpy(&k[1], key.dptr, key.dsize);
+
+ return k;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-23 04:52:48 +0000