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log: Add a lib for integrating the log lib with event framework.

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Linking this library into an application makes the log
configurable via RPC. This only works if the rpc subsystem
is also loaded.

Change-Id: If1340cf2a845ef159290232c26f341150c98fb9a
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
This commit is contained in:
Ben Walker 2016-07-06 11:08:24 -07:00 committed by Daniel Verkamp
parent 548ab005af
commit 44d131105e
4 changed files with 203 additions and 2 deletions
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2
lib/log/Makefile
View File

@ -36,4 +36,6 @@ SPDK_ROOT_DIR := $(abspath $(CURDIR)/../..)
C_SRCS = log.c
LIBNAME = log
DIRS-y = rpc
include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk

39
lib/log/rpc/Makefile Normal file
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@ -0,0 +1,39 @@
#
# BSD LICENSE
#
# Copyright (c) Intel Corporation.
# 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.
#
SPDK_ROOT_DIR := $(abspath $(CURDIR)/../../..)
C_SRCS = log_rpc.c
LIBNAME = log_rpc
include $(SPDK_ROOT_DIR)/mk/spdk.lib.mk

156
lib/log/rpc/log_rpc.c Normal file
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@ -0,0 +1,156 @@
/*-
* BSD LICENSE
*
* Copyright (c) Intel Corporation.
* 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 "spdk/log.h"
#include "spdk/rpc.h"
struct rpc_trace_flag {
char *flag;
};
static void
free_rpc_trace_flag(struct rpc_trace_flag *p)
{
free(p->flag);
}
static const struct spdk_json_object_decoder rpc_trace_flag_decoders[] = {
{"flag", offsetof(struct rpc_trace_flag, flag), spdk_json_decode_string},
};
static void
spdk_rpc_set_trace_flag(struct spdk_jsonrpc_server_conn *conn,
const struct spdk_json_val *params,
const struct spdk_json_val *id)
{
struct rpc_trace_flag req = {};
struct spdk_json_write_ctx *w;
if (spdk_json_decode_object(params, rpc_trace_flag_decoders,
sizeof(rpc_trace_flag_decoders) / sizeof(*rpc_trace_flag_decoders), &req)) {
SPDK_TRACELOG(SPDK_TRACE_DEBUG, "spdk_json_decode_object failed\n");
goto invalid;
}
if (req.flag == 0) {
SPDK_TRACELOG(SPDK_TRACE_DEBUG, "flag was 0\n");
goto invalid;
}
spdk_log_set_trace_flag(req.flag);
free_rpc_trace_flag(&req);
if (id == NULL) {
return;
}
w = spdk_jsonrpc_begin_result(conn, id);
spdk_json_write_bool(w, true);
spdk_jsonrpc_end_result(conn, w);
return;
invalid:
spdk_jsonrpc_send_error_response(conn, id, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid parameters");
free_rpc_trace_flag(&req);
}
SPDK_RPC_REGISTER("set_trace_flag", spdk_rpc_set_trace_flag)
static void
spdk_rpc_clear_trace_flag(struct spdk_jsonrpc_server_conn *conn,
const struct spdk_json_val *params,
const struct spdk_json_val *id)
{
struct rpc_trace_flag req = {};
struct spdk_json_write_ctx *w;
if (spdk_json_decode_object(params, rpc_trace_flag_decoders,
sizeof(rpc_trace_flag_decoders) / sizeof(*rpc_trace_flag_decoders), &req)) {
SPDK_TRACELOG(SPDK_TRACE_DEBUG, "spdk_json_decode_object failed\n");
goto invalid;
}
if (req.flag == 0) {
SPDK_TRACELOG(SPDK_TRACE_DEBUG, "flag was 0\n");
goto invalid;
}
spdk_log_clear_trace_flag(req.flag);
free_rpc_trace_flag(&req);
if (id == NULL) {
return;
}
w = spdk_jsonrpc_begin_result(conn, id);
spdk_json_write_bool(w, true);
spdk_jsonrpc_end_result(conn, w);
return;
invalid:
spdk_jsonrpc_send_error_response(conn, id, SPDK_JSONRPC_ERROR_INVALID_PARAMS, "Invalid parameters");
free_rpc_trace_flag(&req);
}
SPDK_RPC_REGISTER("clear_trace_flag", spdk_rpc_clear_trace_flag)
static void
spdk_rpc_get_trace_flags(struct spdk_jsonrpc_server_conn *conn,
const struct spdk_json_val *params,
const struct spdk_json_val *id)
{
struct spdk_json_write_ctx *w;
size_t i, count;
if (params != NULL) {
spdk_jsonrpc_send_error_response(conn, id, SPDK_JSONRPC_ERROR_INVALID_PARAMS,
"get_trace_flags requires no parameters");
return;
}
if (id == NULL) {
return;
}
count = spdk_log_get_num_trace_flags();
w = spdk_jsonrpc_begin_result(conn, id);
spdk_json_write_object_begin(w);
for (i = 0; i < count; i++) {
const char *name = spdk_log_get_trace_flag_name(i);
spdk_json_write_name(w, name);
spdk_json_write_bool(w, spdk_log_get_trace_flag(name));
}
spdk_json_write_object_end(w);
spdk_jsonrpc_end_result(conn, w);
}
SPDK_RPC_REGISTER("get_trace_flags", spdk_rpc_get_trace_flags)

8
mk/spdk.lib.mk
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@ -35,12 +35,16 @@ include $(SPDK_ROOT_DIR)/mk/spdk.common.mk
LIB := libspdk_$(LIBNAME).a
all: $(LIB)
.PHONY: all clean $(DIRS-y)
clean:
all: $(LIB) $(DIRS-y)
clean: $(DIRS-y)
$(CLEAN_C)
$(LIB): $(OBJS)
$(LIB_C)
include $(SPDK_ROOT_DIR)/mk/spdk.deps.mk
include $(SPDK_ROOT_DIR)/mk/spdk.subdirs.mk