--- /dev/null
+/*
+ ctdb request id handling code
+
+ Copyright (C) Amitay Isaacs 2015
+
+ 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 <talloc.h>
+
+#include "lib/util/idtree.h"
+#include "reqid.h"
+
+struct reqid_context {
+ struct idr_context *idr;
+ uint32_t lastid;
+};
+
+int reqid_init(TALLOC_CTX *mem_ctx, int start_id,
+ struct reqid_context **result)
+{
+ struct reqid_context *reqid_ctx;
+
+ reqid_ctx = talloc_zero(mem_ctx, struct reqid_context);
+ if (reqid_ctx == NULL) {
+ return ENOMEM;
+ }
+
+ reqid_ctx->idr = idr_init(reqid_ctx);
+ if (reqid_ctx->idr == NULL) {
+ talloc_free(reqid_ctx);
+ return ENOMEM;
+ }
+
+ if (start_id <= 0) {
+ start_id = 1;
+ }
+ reqid_ctx->lastid = start_id;
+
+ *result = reqid_ctx;
+ return 0;
+}
+
+uint32_t reqid_new(struct reqid_context *reqid_ctx, void *private_data)
+{
+ int id;
+
+ id = idr_get_new_above(reqid_ctx->idr, private_data,
+ reqid_ctx->lastid+1, INT_MAX);
+ if (id < 0) {
+ /* reqid wrapped */
+ id = idr_get_new(reqid_ctx->idr, private_data, INT_MAX);
+ }
+ if (id == -1) {
+ return REQID_INVALID;
+ }
+
+ reqid_ctx->lastid = id;
+ return id;
+}
+
+void *_reqid_find(struct reqid_context *reqid_ctx, uint32_t reqid)
+{
+ return idr_find(reqid_ctx->idr, reqid);
+}
+
+int reqid_remove(struct reqid_context *reqid_ctx, uint32_t reqid)
+{
+ int ret;
+
+ ret = idr_remove(reqid_ctx->idr, reqid);
+ if (ret < 0) {
+ return ENOENT;
+ }
+ return 0;
+}
--- /dev/null
+/*
+ Request id database
+
+ Copyright (C) Amitay Isaacs 2015
+
+ 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/>.
+*/
+
+#ifndef __CTDB_REQID_H__
+#define __CTDB_REQID_H__
+
+#include <talloc.h>
+
+/**
+ * @file reqid.h
+ *
+ * @brief Request id database
+ *
+ * CTDB tracks messsages using request id. CTDB stores client state for each
+ * request id to process the replies correctly.
+ */
+
+/**
+ * @brief Abstract struct to store request id database
+ */
+struct reqid_context;
+
+#define REQID_INVALID 0xffffffff
+
+/**
+ * @brief Initialize request id database
+ *
+ * This returns a new request id context. Freeing this context will free
+ * all the memory associated with request id database.
+ *
+ * @param[in] mem_ctx Talloc memory context
+ * @param[in] start_id The initial id
+ * @param[out] result The new talloc_context structure
+ * @return 0 on success, errno on failure
+ */
+int reqid_init(TALLOC_CTX *mem_ctx, int start_id,
+ struct reqid_context **result);
+
+/**
+ * @brief Generate new request id and associate given data with the request id
+ *
+ * @param[in] reqid_ctx The request id context
+ * @param[in] private_data The state to associate with new request id
+ * @return new request id, REQID_INVALID on failure
+ */
+uint32_t reqid_new(struct reqid_context *reqid_ctx, void *private_data);
+
+#ifdef DOXYGEN
+/**
+ * @brief Fetch the data associated with the request id
+ *
+ * @param[in] reqid_ctx The request id context
+ * @param[in] reqid The request id
+ * @param[in] type The data type of the stored data
+ * @return the data stored for the reqid, NULL on failure
+ */
+type *reqid_find(struct reqid_context *reqid_ctx, uint32_t reqid, #type);
+#else
+void *_reqid_find(struct reqid_context *reqid_ctx, uint32_t reqid);
+#define reqid_find(ctx, reqid, type) \
+ (type *)talloc_check_name(_reqid_find(ctx, reqid), #type)
+#endif
+
+/**
+ * @brief Remove the data associated with the request id
+ *
+ * @param[in] reqid_ctx The request id context
+ * @param[in] reqid The request id
+ * @return 0 on success, errno on failure
+ */
+int reqid_remove(struct reqid_context *reqid_ctx, uint32_t reqid);
+
+#endif /* __CTDB_REQID_H__ */
--- /dev/null
+#!/bin/sh
+
+. "${TEST_SCRIPTS_DIR}/unit.sh"
+
+output=$(
+for i in $(seq 0 1023) ; do
+ echo "WARNING: attempt to remove unset id $i in idtree"
+done
+)
+
+ok "$output"
+
+unit_test reqid_test
--- /dev/null
+/*
+ reqid tests
+
+ Copyright (C) Amitay Isaacs 2015
+
+ 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 <assert.h>
+
+#include "common/reqid.c"
+
+
+int main(void)
+{
+ struct reqid_context *reqid_ctx;
+ TALLOC_CTX *mem_ctx = talloc_new(NULL);
+ int i, ret;
+ uint32_t reqid;
+ int *data, *tmp;
+
+ ret = reqid_init(mem_ctx, INT_MAX-200, &reqid_ctx);
+ assert(ret == 0);
+
+ data = talloc_zero(mem_ctx, int);
+ assert(data != 0);
+
+ for (i=0; i<1024*1024; i++) {
+ reqid = reqid_new(reqid_ctx, data);
+ assert(reqid != -1);
+ }
+
+ for (i=0; i<1024; i++) {
+ tmp = reqid_find(reqid_ctx, i, int);
+ assert(tmp == data);
+ }
+
+ for (i=0; i<1024; i++) {
+ ret = reqid_remove(reqid_ctx, i);
+ assert(ret == 0);
+ }
+
+ for (i=0; i<1024; i++) {
+ tmp = reqid_find(reqid_ctx, i, int);
+ assert(tmp == NULL);
+ }
+
+ for (i=0; i<1024; i++) {
+ ret = reqid_remove(reqid_ctx, i);
+ assert(ret == ENOENT);
+ }
+
+ talloc_free(reqid_ctx);
+ assert(talloc_get_size(mem_ctx) == 0);
+
+ talloc_free(mem_ctx);
+
+ return 0;
+}
bld.SAMBA_SUBSYSTEM('ctdb-util',
source=bld.SUBDIR('common',
- '''db_hash.c srvid.c'''),
+ '''db_hash.c srvid.c reqid.c'''),
deps='replace talloc tevent tdb')
bld.SAMBA_SUBSYSTEM('ctdb-client',
deps='talloc tevent tdb',
install_path='${CTDB_TEST_LIBDIR}')
+ bld.SAMBA_BINARY('reqid_test',
+ source='tests/src/reqid_test.c',
+ deps='samba-util',
+ install_path='${CTDB_TEST_LIBDIR}')
+
# Test binaries
ctdb_tests = [
'rb_test',
git.samba.org / ambi / samba-autobuild / .git / commitdiff