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/*
ctdb utility code
Copyright (C) Andrew Tridgell 2006
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "includes.h"
#include "lib/events/events.h"
#include "lib/tdb/include/tdb.h"
#include "system/network.h"
#include "system/filesys.h"
#include "cluster/ctdb/include/ctdb_private.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(0,("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(0,("ctdb fatal error: %s\n", msg));
fprintf(stderr, "ctdb fatal error: '%s'\n", msg);
abort();
}
/*
parse a IP:port pair
*/
int ctdb_parse_address(struct ctdb_context *ctdb,
TALLOC_CTX *mem_ctx, const char *str,
struct ctdb_address *address)
{
char *p;
p = strchr(str, ':');
if (p == NULL) {
ctdb_set_error(ctdb, "Badly formed node '%s'\n", str);
return -1;
}
address->address = talloc_strndup(mem_ctx, str, p-str);
address->port = strtoul(p+1, NULL, 0);
return 0;
}
/*
check if two addresses are the same
*/
bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
{
return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
}
/*
hash function for mapping data to a VNN - taken from tdb
*/
uint32_t ctdb_hash(const TDB_DATA *key)
{
uint32_t value; /* Used to compute the hash value. */
uint32_t i; /* Used to cycle through random values. */
/* Set the initial value from the key size. */
for (value = 0x238F13AF * key->dsize, i=0; i < key->dsize; i++)
value = (value + (key->dptr[i] << (i*5 % 24)));
return (1103515243 * value + 12345);
}
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