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https://github.com/samba-team/samba.git
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fdb317facf
- split up ctdb layer code into 3 modules - added a simple test suite - added packet structures for ctdb_call - switched to an array for ctdb_node to make vnn lookup easy and fast (This used to be ctdb commit 8a17460a816a5970f2df8244a06aec55d814f186)
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
/*
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ctdb utility code
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Copyright (C) Andrew Tridgell 2006
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "includes.h"
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#include "lib/events/events.h"
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#include "system/network.h"
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#include "system/filesys.h"
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#include "ctdb_private.h"
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/*
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return error string for last error
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*/
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const char *ctdb_errstr(struct ctdb_context *ctdb)
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{
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return ctdb->err_msg;
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}
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/*
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remember an error message
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*/
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void ctdb_set_error(struct ctdb_context *ctdb, const char *fmt, ...)
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{
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va_list ap;
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talloc_free(ctdb->err_msg);
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va_start(ap, fmt);
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ctdb->err_msg = talloc_vasprintf(ctdb, fmt, ap);
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va_end(ap);
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}
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/*
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parse a IP:port pair
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*/
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int ctdb_parse_address(struct ctdb_context *ctdb,
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TALLOC_CTX *mem_ctx, const char *str,
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struct ctdb_address *address)
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{
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char *p;
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p = strchr(str, ':');
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if (p == NULL) {
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ctdb_set_error(ctdb, "Badly formed node '%s'\n", str);
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return -1;
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}
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address->address = talloc_strndup(mem_ctx, str, p-str);
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address->port = strtoul(p+1, NULL, 0);
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return 0;
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}
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/*
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check if two addresses are the same
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*/
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bool ctdb_same_address(struct ctdb_address *a1, struct ctdb_address *a2)
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{
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return strcmp(a1->address, a2->address) == 0 && a1->port == a2->port;
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}
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/*
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hash function for mapping data to a VNN - taken from tdb
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*/
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uint32_t ctdb_hash(TDB_DATA *key)
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{
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uint32_t value; /* Used to compute the hash value. */
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uint32_t i; /* Used to cycle through random values. */
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/* Set the initial value from the key size. */
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for (value = 0x238F13AF * key->dsize, i=0; i < key->dsize; i++)
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value = (value + (key->dptr[i] << (i*5 % 24)));
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return (1103515243 * value + 12345);
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}
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