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43e5396b DG |
1 | /* |
2 | * Copyright (C) 2013 - David Goulet <dgoulet@efficios.com> | |
3 | * | |
4 | * | |
5 | * This library is free software; you can redistribute it and/or modify it | |
6 | * under the terms of the GNU Lesser General Public License, version 2.1 only, | |
7 | * as published by the Free Software Foundation. | |
8 | * | |
9 | * This library is distributed in the hope that it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU Lesser General Public License | |
15 | * along with this library; if not, write to the Free Software Foundation, | |
16 | * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
17 | */ | |
18 | ||
501f6777 | 19 | package org.lttng.ust.agent; |
43e5396b DG |
20 | |
21 | import java.nio.ByteBuffer; | |
22 | import java.nio.ByteOrder; | |
a15440fd | 23 | import java.lang.Object; |
43e5396b DG |
24 | import java.util.ArrayList; |
25 | import java.util.List; | |
26 | import java.util.Enumeration; | |
501f6777 | 27 | import java.util.Iterator; |
43e5396b | 28 | |
501f6777 | 29 | interface LTTngSessiondCmd2_6 { |
43e5396b DG |
30 | /** |
31 | * Maximum name length for a logger name to be send to sessiond. | |
32 | */ | |
33 | final static int NAME_MAX = 255; | |
34 | ||
a15440fd DG |
35 | /* |
36 | * Size of a primitive type int in byte. Because you know, Java can't | |
37 | * provide that since it does not makes sense... | |
38 | */ | |
39 | final static int INT_SIZE = 4; | |
40 | ||
43e5396b DG |
41 | public interface SessiondResponse { |
42 | /** | |
43 | * Gets a byte array of the command so that it may be streamed | |
44 | * | |
45 | * @return the byte array of the command | |
46 | */ | |
47 | public byte[] getBytes(); | |
48 | } | |
49 | ||
50 | public interface SessiondCommand { | |
51 | /** | |
52 | * Populate the class from a byte array | |
53 | * | |
54 | * @param data | |
55 | * the byte array containing the streamed command | |
56 | */ | |
57 | public void populate(byte[] data); | |
58 | } | |
59 | ||
501f6777 | 60 | public enum lttng_agent_command { |
43e5396b DG |
61 | /** List logger(s). */ |
62 | CMD_LIST(1), | |
63 | /** Enable logger by name. */ | |
64 | CMD_ENABLE(2), | |
65 | /** Disable logger by name. */ | |
f08bb871 DG |
66 | CMD_DISABLE(3), |
67 | /** Registration done */ | |
68 | CMD_REG_DONE(4); | |
69 | ||
43e5396b DG |
70 | private int code; |
71 | ||
501f6777 | 72 | private lttng_agent_command(int c) { |
43e5396b DG |
73 | code = c; |
74 | } | |
75 | ||
76 | public int getCommand() { | |
77 | return code; | |
78 | } | |
79 | } | |
80 | ||
501f6777 | 81 | enum lttng_agent_ret_code { |
43e5396b DG |
82 | CODE_SUCCESS_CMD(1), |
83 | CODE_INVALID_CMD(2), | |
84 | CODE_UNK_LOGGER_NAME(3); | |
85 | private int code; | |
86 | ||
501f6777 | 87 | private lttng_agent_ret_code(int c) { |
43e5396b DG |
88 | code = c; |
89 | } | |
90 | ||
91 | public int getCode() { | |
92 | return code; | |
93 | } | |
94 | } | |
95 | ||
96 | public class sessiond_hdr implements SessiondCommand { | |
97 | /** ABI size of command header. */ | |
98 | public final static int SIZE = 16; | |
99 | /** Payload size in bytes following this header. */ | |
100 | public long data_size; | |
101 | /** Command type. */ | |
501f6777 | 102 | public lttng_agent_command cmd; |
43e5396b DG |
103 | /** Command version. */ |
104 | public int cmd_version; | |
105 | ||
106 | public void populate(byte[] data) { | |
107 | ByteBuffer buf = ByteBuffer.wrap(data); | |
108 | buf.order(ByteOrder.BIG_ENDIAN); | |
109 | ||
110 | data_size = buf.getLong(); | |
501f6777 | 111 | cmd = lttng_agent_command.values()[buf.getInt() - 1]; |
43e5396b DG |
112 | cmd_version = buf.getInt(); |
113 | } | |
114 | } | |
115 | ||
116 | public class sessiond_enable_handler implements SessiondResponse, SessiondCommand { | |
117 | private final static int SIZE = 4; | |
118 | public String name; | |
a15440fd DG |
119 | public int lttngLogLevel; |
120 | public int lttngLogLevelType; | |
43e5396b DG |
121 | |
122 | /** Return status code to the session daemon. */ | |
501f6777 | 123 | public lttng_agent_ret_code code; |
43e5396b DG |
124 | |
125 | @Override | |
126 | public void populate(byte[] data) { | |
a15440fd DG |
127 | int data_offset = INT_SIZE * 2; |
128 | ||
43e5396b DG |
129 | ByteBuffer buf = ByteBuffer.wrap(data); |
130 | buf.order(ByteOrder.LITTLE_ENDIAN); | |
a15440fd DG |
131 | lttngLogLevel = buf.getInt(); |
132 | lttngLogLevelType = buf.getInt(); | |
9663e532 | 133 | name = new String(data, data_offset, data.length - data_offset).trim(); |
43e5396b DG |
134 | } |
135 | ||
136 | @Override | |
137 | public byte[] getBytes() { | |
138 | byte data[] = new byte[SIZE]; | |
139 | ByteBuffer buf = ByteBuffer.wrap(data); | |
140 | buf.order(ByteOrder.BIG_ENDIAN); | |
141 | buf.putInt(code.getCode()); | |
142 | return data; | |
143 | } | |
144 | ||
145 | /** | |
146 | * Execute enable handler action which is to enable the given handler | |
147 | * to the received name. | |
43e5396b | 148 | */ |
501f6777 CB |
149 | public void execute(LogFramework log) { |
150 | if (log.enableLogger(this.name)) { | |
151 | this.code = lttng_agent_ret_code.CODE_SUCCESS_CMD; | |
152 | } else { | |
153 | this.code = lttng_agent_ret_code.CODE_INVALID_CMD; | |
43e5396b | 154 | } |
43e5396b DG |
155 | } |
156 | } | |
157 | ||
158 | public class sessiond_disable_handler implements SessiondResponse, SessiondCommand { | |
159 | private final static int SIZE = 4; | |
160 | public String name; | |
501f6777 | 161 | |
43e5396b DG |
162 | |
163 | /** Return status code to the session daemon. */ | |
501f6777 | 164 | public lttng_agent_ret_code code; |
43e5396b DG |
165 | |
166 | @Override | |
167 | public void populate(byte[] data) { | |
168 | ByteBuffer buf = ByteBuffer.wrap(data); | |
96caa5ed | 169 | buf.order(ByteOrder.LITTLE_ENDIAN); |
9663e532 | 170 | name = new String(data).trim(); |
43e5396b DG |
171 | } |
172 | ||
173 | @Override | |
174 | public byte[] getBytes() { | |
175 | byte data[] = new byte[SIZE]; | |
176 | ByteBuffer buf = ByteBuffer.wrap(data); | |
177 | buf.order(ByteOrder.BIG_ENDIAN); | |
178 | buf.putInt(code.getCode()); | |
179 | return data; | |
180 | } | |
181 | ||
182 | /** | |
183 | * Execute disable handler action which is to disable the given handler | |
184 | * to the received name. | |
185 | */ | |
501f6777 CB |
186 | public void execute(LogFramework log) { |
187 | if (log.disableLogger(this.name)) { | |
188 | this.code = lttng_agent_ret_code.CODE_SUCCESS_CMD; | |
189 | } else { | |
190 | this.code = lttng_agent_ret_code.CODE_INVALID_CMD; | |
43e5396b | 191 | } |
43e5396b DG |
192 | } |
193 | } | |
194 | ||
195 | public class sessiond_list_logger implements SessiondResponse { | |
196 | private final static int SIZE = 12; | |
197 | ||
198 | private int data_size = 0; | |
199 | private int nb_logger = 0; | |
200 | ||
201 | List<String> logger_list = new ArrayList<String>(); | |
202 | ||
203 | /** Return status code to the session daemon. */ | |
501f6777 | 204 | public lttng_agent_ret_code code; |
43e5396b DG |
205 | |
206 | @Override | |
207 | public byte[] getBytes() { | |
208 | byte data[] = new byte[SIZE + data_size]; | |
209 | ByteBuffer buf = ByteBuffer.wrap(data); | |
210 | buf.order(ByteOrder.BIG_ENDIAN); | |
211 | ||
212 | /* Returned code */ | |
213 | buf.putInt(code.getCode()); | |
214 | buf.putInt(data_size); | |
215 | buf.putInt(nb_logger); | |
216 | ||
217 | for (String logger: logger_list) { | |
218 | buf.put(logger.getBytes()); | |
219 | /* NULL terminated byte after the logger name. */ | |
220 | buf.put((byte) 0x0); | |
221 | } | |
222 | return data; | |
223 | } | |
224 | ||
501f6777 | 225 | public void execute(LogFramework log) { |
43e5396b DG |
226 | String loggerName; |
227 | ||
501f6777 CB |
228 | Iterator<String> loggers = log.listLoggers(); |
229 | while (loggers.hasNext()) { | |
230 | loggerName = loggers.next(); | |
43e5396b DG |
231 | this.logger_list.add(loggerName); |
232 | this.nb_logger++; | |
233 | this.data_size += loggerName.length() + 1; | |
234 | } | |
235 | ||
501f6777 | 236 | this.code = lttng_agent_ret_code.CODE_SUCCESS_CMD; |
43e5396b DG |
237 | } |
238 | } | |
239 | } |