Adding upstream version 18.2.2.upstream/18.2.2

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

1 files changed, 392 insertions, 0 deletions

diff --git a/src/spdk/lib/rpc/rpc.c b/src/spdk/lib/rpc/rpc.c
new file mode 100644
index 000000000..7182f41e9
--- /dev/null
+++ b/src/spdk/lib/rpc/rpc.c
@@ -0,0 +1,392 @@
+/*-
+ *   BSD LICENSE
+ *
+ *   Copyright (c) Intel Corporation. All rights reserved.
+ *   Copyright (c) 2019 Mellanox Technologies LTD. All rights reserved.
+ *
+ *   Redistribution and use in source and binary forms, with or without
+ *   modification, are permitted provided that the following conditions
+ *   are met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in
+ *       the documentation and/or other materials provided with the
+ *       distribution.
+ *     * Neither the name of Intel Corporation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/file.h>
+
+#include "spdk/stdinc.h"
+
+#include "spdk/queue.h"
+#include "spdk/rpc.h"
+#include "spdk/env.h"
+#include "spdk/log.h"
+#include "spdk/string.h"
+#include "spdk/util.h"
+#include "spdk/version.h"
+
+static struct sockaddr_un g_rpc_listen_addr_unix = {};
+static char g_rpc_lock_path[sizeof(g_rpc_listen_addr_unix.sun_path) + sizeof(".lock")];
+static int g_rpc_lock_fd = -1;
+
+static struct spdk_jsonrpc_server *g_jsonrpc_server = NULL;
+static uint32_t g_rpc_state;
+static bool g_rpcs_correct = true;
+
+struct spdk_rpc_method {
+	const char *name;
+	spdk_rpc_method_handler func;
+	SLIST_ENTRY(spdk_rpc_method) slist;
+	uint32_t state_mask;
+	bool is_deprecated;
+	struct spdk_rpc_method *is_alias_of;
+	bool deprecation_warning_printed;
+};
+
+static SLIST_HEAD(, spdk_rpc_method) g_rpc_methods = SLIST_HEAD_INITIALIZER(g_rpc_methods);
+
+void
+spdk_rpc_set_state(uint32_t state)
+{
+	g_rpc_state = state;
+}
+
+uint32_t
+spdk_rpc_get_state(void)
+{
+	return g_rpc_state;
+}
+
+static struct spdk_rpc_method *
+_get_rpc_method(const struct spdk_json_val *method)
+{
+	struct spdk_rpc_method *m;
+
+	SLIST_FOREACH(m, &g_rpc_methods, slist) {
+		if (spdk_json_strequal(method, m->name)) {
+			return m;
+		}
+	}
+
+	return NULL;
+}
+
+static struct spdk_rpc_method *
+_get_rpc_method_raw(const char *method)
+{
+	struct spdk_json_val method_val;
+
+	method_val.type = SPDK_JSON_VAL_STRING;
+	method_val.len = strlen(method);
+	method_val.start = (char *)method;
+
+	return _get_rpc_method(&method_val);
+}
+
+static void
+jsonrpc_handler(struct spdk_jsonrpc_request *request,
+		const struct spdk_json_val *method,
+		const struct spdk_json_val *params)
+{
+	struct spdk_rpc_method *m;
+
+	assert(method != NULL);
+
+	m = _get_rpc_method(method);
+	if (m == NULL) {
+		spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_METHOD_NOT_FOUND, "Method not found");
+		return;
+	}
+
+	if (m->is_alias_of != NULL) {
+		if (m->is_deprecated && !m->deprecation_warning_printed) {
+			SPDK_WARNLOG("RPC method %s is deprecated.  Use %s instead.\n", m->name, m->is_alias_of->name);
+			m->deprecation_warning_printed = true;
+		}
+		m = m->is_alias_of;
+	}
+
+	if ((m->state_mask & g_rpc_state) == g_rpc_state) {
+		m->func(request, params);
+	} else {
+		spdk_jsonrpc_send_error_response_fmt(request, SPDK_JSONRPC_ERROR_INVALID_STATE,
+						     "Method is allowed in any state in the mask (%"PRIx32"),"
+						     " but current state is (%"PRIx32")",
+						     m->state_mask, g_rpc_state);
+	}
+}
+
+int
+spdk_rpc_listen(const char *listen_addr)
+{
+	int rc;
+
+	memset(&g_rpc_listen_addr_unix, 0, sizeof(g_rpc_listen_addr_unix));
+
+	g_rpc_listen_addr_unix.sun_family = AF_UNIX;
+	rc = snprintf(g_rpc_listen_addr_unix.sun_path,
+		      sizeof(g_rpc_listen_addr_unix.sun_path),
+		      "%s", listen_addr);
+	if (rc < 0 || (size_t)rc >= sizeof(g_rpc_listen_addr_unix.sun_path)) {
+		SPDK_ERRLOG("RPC Listen address Unix socket path too long\n");
+		g_rpc_listen_addr_unix.sun_path[0] = '\0';
+		return -1;
+	}
+
+	rc = snprintf(g_rpc_lock_path, sizeof(g_rpc_lock_path), "%s.lock",
+		      g_rpc_listen_addr_unix.sun_path);
+	if (rc < 0 || (size_t)rc >= sizeof(g_rpc_lock_path)) {
+		SPDK_ERRLOG("RPC lock path too long\n");
+		g_rpc_listen_addr_unix.sun_path[0] = '\0';
+		g_rpc_lock_path[0] = '\0';
+		return -1;
+	}
+
+	g_rpc_lock_fd = open(g_rpc_lock_path, O_RDONLY | O_CREAT, 0600);
+	if (g_rpc_lock_fd == -1) {
+		SPDK_ERRLOG("Cannot open lock file %s: %s\n",
+			    g_rpc_lock_path, spdk_strerror(errno));
+		g_rpc_listen_addr_unix.sun_path[0] = '\0';
+		g_rpc_lock_path[0] = '\0';
+		return -1;
+	}
+
+	rc = flock(g_rpc_lock_fd, LOCK_EX | LOCK_NB);
+	if (rc != 0) {
+		SPDK_ERRLOG("RPC Unix domain socket path %s in use. Specify another.\n",
+			    g_rpc_listen_addr_unix.sun_path);
+		g_rpc_listen_addr_unix.sun_path[0] = '\0';
+		g_rpc_lock_path[0] = '\0';
+		return -1;
+	}
+
+	/*
+	 * Since we acquired the lock, it is safe to delete the Unix socket file
+	 * if it still exists from a previous process.
+	 */
+	unlink(g_rpc_listen_addr_unix.sun_path);
+
+	g_jsonrpc_server = spdk_jsonrpc_server_listen(AF_UNIX, 0,
+			   (struct sockaddr *)&g_rpc_listen_addr_unix,
+			   sizeof(g_rpc_listen_addr_unix),
+			   jsonrpc_handler);
+	if (g_jsonrpc_server == NULL) {
+		SPDK_ERRLOG("spdk_jsonrpc_server_listen() failed\n");
+		close(g_rpc_lock_fd);
+		g_rpc_lock_fd = -1;
+		unlink(g_rpc_lock_path);
+		g_rpc_lock_path[0] = '\0';
+		return -1;
+	}
+
+	return 0;
+}
+
+void
+spdk_rpc_accept(void)
+{
+	spdk_jsonrpc_server_poll(g_jsonrpc_server);
+}
+
+void
+spdk_rpc_register_method(const char *method, spdk_rpc_method_handler func, uint32_t state_mask)
+{
+	struct spdk_rpc_method *m;
+
+	m = _get_rpc_method_raw(method);
+	if (m != NULL) {
+		SPDK_ERRLOG("duplicate RPC %s registered...\n", method);
+		g_rpcs_correct = false;
+		return;
+	}
+
+	m = calloc(1, sizeof(struct spdk_rpc_method));
+	assert(m != NULL);
+
+	m->name = strdup(method);
+	assert(m->name != NULL);
+
+	m->func = func;
+	m->state_mask = state_mask;
+
+	/* TODO: use a hash table or sorted list */
+	SLIST_INSERT_HEAD(&g_rpc_methods, m, slist);
+}
+
+void
+spdk_rpc_register_alias_deprecated(const char *method, const char *alias)
+{
+	struct spdk_rpc_method *m, *base;
+
+	base = _get_rpc_method_raw(method);
+	if (base == NULL) {
+		SPDK_ERRLOG("cannot create alias %s - method %s does not exist\n",
+			    alias, method);
+		g_rpcs_correct = false;
+		return;
+	}
+
+	if (base->is_alias_of != NULL) {
+		SPDK_ERRLOG("cannot create alias %s of alias %s\n", alias, method);
+		g_rpcs_correct = false;
+		return;
+	}
+
+	m = calloc(1, sizeof(struct spdk_rpc_method));
+	assert(m != NULL);
+
+	m->name = strdup(alias);
+	assert(m->name != NULL);
+
+	m->is_alias_of = base;
+	m->is_deprecated = true;
+	m->state_mask = base->state_mask;
+
+	/* TODO: use a hash table or sorted list */
+	SLIST_INSERT_HEAD(&g_rpc_methods, m, slist);
+}
+
+bool
+spdk_rpc_verify_methods(void)
+{
+	return g_rpcs_correct;
+}
+
+int
+spdk_rpc_is_method_allowed(const char *method, uint32_t state_mask)
+{
+	struct spdk_rpc_method *m;
+
+	SLIST_FOREACH(m, &g_rpc_methods, slist) {
+		if (strcmp(m->name, method) != 0) {
+			continue;
+		}
+
+		if ((m->state_mask & state_mask) == state_mask) {
+			return 0;
+		} else {
+			return -EPERM;
+		}
+	}
+
+	return -ENOENT;
+}
+
+void
+spdk_rpc_close(void)
+{
+	if (g_jsonrpc_server) {
+		if (g_rpc_listen_addr_unix.sun_path[0]) {
+			/* Delete the Unix socket file */
+			unlink(g_rpc_listen_addr_unix.sun_path);
+			g_rpc_listen_addr_unix.sun_path[0] = '\0';
+		}
+
+		spdk_jsonrpc_server_shutdown(g_jsonrpc_server);
+		g_jsonrpc_server = NULL;
+
+		if (g_rpc_lock_fd != -1) {
+			close(g_rpc_lock_fd);
+			g_rpc_lock_fd = -1;
+		}
+
+		if (g_rpc_lock_path[0]) {
+			unlink(g_rpc_lock_path);
+			g_rpc_lock_path[0] = '\0';
+		}
+	}
+}
+
+struct rpc_get_methods {
+	bool current;
+	bool include_aliases;
+};
+
+static const struct spdk_json_object_decoder rpc_get_methods_decoders[] = {
+	{"current", offsetof(struct rpc_get_methods, current), spdk_json_decode_bool, true},
+	{"include_aliases", offsetof(struct rpc_get_methods, include_aliases), spdk_json_decode_bool, true},
+};
+
+static void
+rpc_get_methods(struct spdk_jsonrpc_request *request, const struct spdk_json_val *params)
+{
+	struct rpc_get_methods req = {};
+	struct spdk_json_write_ctx *w;
+	struct spdk_rpc_method *m;
+
+	if (params != NULL) {
+		if (spdk_json_decode_object(params, rpc_get_methods_decoders,
+					    SPDK_COUNTOF(rpc_get_methods_decoders), &req)) {
+			SPDK_ERRLOG("spdk_json_decode_object failed\n");
+			spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
+							 "Invalid parameters");
+			return;
+		}
+	}
+
+	w = spdk_jsonrpc_begin_result(request);
+	spdk_json_write_array_begin(w);
+	SLIST_FOREACH(m, &g_rpc_methods, slist) {
+		if (m->is_alias_of != NULL && !req.include_aliases) {
+			continue;
+		}
+		if (req.current && ((m->state_mask & g_rpc_state) != g_rpc_state)) {
+			continue;
+		}
+		spdk_json_write_string(w, m->name);
+	}
+	spdk_json_write_array_end(w);
+	spdk_jsonrpc_end_result(request, w);
+}
+SPDK_RPC_REGISTER("rpc_get_methods", rpc_get_methods, SPDK_RPC_STARTUP | SPDK_RPC_RUNTIME)
+SPDK_RPC_REGISTER_ALIAS_DEPRECATED(rpc_get_methods, get_rpc_methods)
+
+static void
+rpc_spdk_get_version(struct spdk_jsonrpc_request *request, const struct spdk_json_val *params)
+{
+	struct spdk_json_write_ctx *w;
+
+	if (params != NULL) {
+		spdk_jsonrpc_send_error_response(request, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
+						 "spdk_get_version method requires no parameters");
+		return;
+	}
+
+	w = spdk_jsonrpc_begin_result(request);
+	spdk_json_write_object_begin(w);
+
+	spdk_json_write_named_string_fmt(w, "version", "%s", SPDK_VERSION_STRING);
+	spdk_json_write_named_object_begin(w, "fields");
+	spdk_json_write_named_uint32(w, "major", SPDK_VERSION_MAJOR);
+	spdk_json_write_named_uint32(w, "minor", SPDK_VERSION_MINOR);
+	spdk_json_write_named_uint32(w, "patch", SPDK_VERSION_PATCH);
+	spdk_json_write_named_string_fmt(w, "suffix", "%s", SPDK_VERSION_SUFFIX);
+#ifdef SPDK_GIT_COMMIT
+	spdk_json_write_named_string_fmt(w, "commit", "%s", SPDK_GIT_COMMIT_STRING);
+#endif
+	spdk_json_write_object_end(w);
+
+	spdk_json_write_object_end(w);
+	spdk_jsonrpc_end_result(request, w);
+}
+SPDK_RPC_REGISTER("spdk_get_version", rpc_spdk_get_version,
+		  SPDK_RPC_STARTUP | SPDK_RPC_RUNTIME)
+SPDK_RPC_REGISTER_ALIAS_DEPRECATED(spdk_get_version, get_spdk_version)