From 5cb78383fafa15c2ff7a4ccd194cccd5cf5cd263 Mon Sep 17 00:00:00 2001
From: Andrew Tridgell <tridge@samba.org>
Date: Fri, 19 Jan 2007 03:54:48 +0000
Subject: r20889: import ctdb cluster backend from bzr

it will be interesting to see how the build farm handles this
(This used to be commit 53be449630bd67d649a9e70cc7e25a9799c0616b)
---
 source4/cluster/ctdb/common/ctdb_util.c | 103 ++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 source4/cluster/ctdb/common/ctdb_util.c

(limited to 'source4/cluster/ctdb/common/ctdb_util.c')

diff --git a/source4/cluster/ctdb/common/ctdb_util.c b/source4/cluster/ctdb/common/ctdb_util.c
new file mode 100644
index 0000000000..8e25759609
--- /dev/null
+++ b/source4/cluster/ctdb/common/ctdb_util.c
@@ -0,0 +1,103 @@
+/* 
+   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);  
+}
-- 
cgit