Adding upstream version 2:4.20.0+dfsg.upstream/2%4.20.0+dfsg

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 170 insertions, 0 deletions

diff --git a/ctdb/server/ctdb_tunables.c b/ctdb/server/ctdb_tunables.c
new file mode 100644
index 0000000..0dce656
--- /dev/null
+++ b/ctdb/server/ctdb_tunables.c
@@ -0,0 +1,170 @@
+/* 
+   ctdb tunables code
+
+   Copyright (C) Andrew Tridgell  2007
+
+   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 <talloc.h>
+#include <tdb.h>
+
+#include "lib/util/debug.h"
+
+#include "ctdb_private.h"
+
+#include "common/common.h"
+#include "common/logging.h"
+#include "common/path.h"
+#include "common/tunable.h"
+
+/*
+  set all tunables to defaults
+ */
+void ctdb_tunables_set_defaults(struct ctdb_context *ctdb)
+{
+	ctdb_tunable_set_defaults(&ctdb->tunable);
+}
+
+
+/*
+  get a tunable
+ */
+int32_t ctdb_control_get_tunable(struct ctdb_context *ctdb, TDB_DATA indata,
+				 TDB_DATA *outdata)
+{
+	struct ctdb_control_get_tunable *t =
+		(struct ctdb_control_get_tunable *)indata.dptr;
+	char *name;
+	uint32_t val;
+	bool ret;
+
+	if (indata.dsize < sizeof(*t) ||
+	    t->length > indata.dsize - offsetof(struct ctdb_control_get_tunable, name)) {
+		DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_get_tunable\n"));
+		return -1;
+	}
+
+	name = talloc_strndup(ctdb, (char*)t->name, t->length);
+	CTDB_NO_MEMORY(ctdb, name);
+
+	ret = ctdb_tunable_get_value(&ctdb->tunable, name, &val);
+	talloc_free(name);
+	if (! ret) {
+		return -EINVAL;
+	}
+
+	outdata->dptr = (uint8_t *)talloc(outdata, uint32_t);
+	CTDB_NO_MEMORY(ctdb, outdata->dptr);
+
+	*(uint32_t *)outdata->dptr = val;
+	outdata->dsize = sizeof(uint32_t);
+
+	return 0;
+}
+
+
+/*
+  set a tunable
+ */
+int32_t ctdb_control_set_tunable(struct ctdb_context *ctdb, TDB_DATA indata)
+{
+	struct ctdb_tunable_old *t =
+		(struct ctdb_tunable_old *)indata.dptr;
+	char *name;
+	int ret;
+	bool obsolete;
+
+	if (indata.dsize < sizeof(*t) ||
+	    t->length > indata.dsize - offsetof(struct ctdb_tunable_old, name)) {
+		DEBUG(DEBUG_ERR,("Bad indata in ctdb_control_set_tunable\n"));
+		return -1;
+	}
+
+	name = talloc_strndup(ctdb, (char *)t->name, t->length);
+	CTDB_NO_MEMORY(ctdb, name);
+
+	ret = ctdb_tunable_set_value(&ctdb->tunable, name, t->value,
+				     &obsolete);
+	if (! ret) {
+		talloc_free(name);
+		return -1;
+	}
+
+	if (obsolete) {
+		DEBUG(DEBUG_WARNING,
+		      ("Setting obsolete tunable \"%s\"\n", name));
+		talloc_free(name);
+		return 1;
+	}
+
+	talloc_free(name);
+	return 0;
+}
+
+/*
+  list tunables
+ */
+int32_t ctdb_control_list_tunables(struct ctdb_context *ctdb, TDB_DATA *outdata)
+{
+	char *list = NULL;
+	struct ctdb_control_list_tunable *t;
+
+	list = ctdb_tunable_names_to_string(outdata);
+	CTDB_NO_MEMORY(ctdb, list);
+
+	outdata->dsize = offsetof(struct ctdb_control_list_tunable, data) +
+		strlen(list) + 1;
+	outdata->dptr = talloc_size(outdata, outdata->dsize);
+	CTDB_NO_MEMORY(ctdb, outdata->dptr);
+
+	t = (struct ctdb_control_list_tunable *)outdata->dptr;
+	t->length = strlen(list)+1;
+
+	memcpy(t->data, list, t->length);
+	talloc_free(list);
+
+	return 0;
+}
+
+bool ctdb_tunables_load(struct ctdb_context *ctdb)
+{
+	bool status;
+	TALLOC_CTX *tmp_ctx;
+	char *file = NULL;
+
+	/* Fail by default */
+	status = false;
+
+	tmp_ctx = talloc_new(ctdb);
+	if (tmp_ctx == NULL) {
+		DBG_ERR("Memory allocation error\n");
+		goto done;
+	}
+
+	file = path_etcdir_append(tmp_ctx, "ctdb.tunables");
+	if (file == NULL) {
+		D_ERR("Failed to construct path for ctdb.tunables\n");
+		goto done;
+	}
+
+	status = ctdb_tunable_load_file(tmp_ctx, &ctdb->tunable, file);
+	/* No need to log error, already logged above */
+
+done:
+	talloc_free(tmp_ctx);
+	return status;
+}