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7cdc2bab MD |
1 | /* |
2 | * Copyright 2016 - Philippe Proulx <pproulx@efficios.com> | |
3 | * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation | |
4 | * | |
5 | * Some functions are based on older functions written by Mathieu Desnoyers. | |
6 | * | |
7 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
8 | * of this software and associated documentation files (the "Software"), to deal | |
9 | * in the Software without restriction, including without limitation the rights | |
10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
11 | * copies of the Software, and to permit persons to whom the Software is | |
12 | * furnished to do so, subject to the following conditions: | |
13 | * | |
14 | * The above copyright notice and this permission notice shall be included in | |
15 | * all copies or substantial portions of the Software. | |
16 | * | |
17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
23 | * SOFTWARE. | |
24 | */ | |
25 | ||
26 | #include <stdio.h> | |
27 | #include <stdint.h> | |
28 | #include <stdlib.h> | |
29 | #include <stdbool.h> | |
30 | #include <glib.h> | |
31 | #include <babeltrace/compat/uuid-internal.h> | |
32 | #include <babeltrace/compat/memstream-internal.h> | |
33 | ||
34 | #define PRINT_ERR_STREAM lttng_live->error_fp | |
35 | #define PRINT_PREFIX "lttng-live-metadata" | |
36 | #define PRINT_DBG_CHECK lttng_live_debug | |
37 | #include "../print.h" | |
38 | ||
39 | #include "metadata.h" | |
40 | #include "../common/metadata/decoder.h" | |
41 | ||
42 | #define TSDL_MAGIC 0x75d11d57 | |
43 | ||
44 | struct packet_header { | |
45 | uint32_t magic; | |
46 | uint8_t uuid[16]; | |
47 | uint32_t checksum; | |
48 | uint32_t content_size; | |
49 | uint32_t packet_size; | |
50 | uint8_t compression_scheme; | |
51 | uint8_t encryption_scheme; | |
52 | uint8_t checksum_scheme; | |
53 | uint8_t major; | |
54 | uint8_t minor; | |
55 | } __attribute__((__packed__)); | |
56 | ||
57 | static | |
58 | enum bt_ctf_lttng_live_iterator_status lttng_live_update_clock_map( | |
59 | struct lttng_live_trace *trace) | |
60 | { | |
61 | enum bt_ctf_lttng_live_iterator_status status = | |
62 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
63 | size_t i; | |
64 | int count, ret; | |
65 | ||
66 | BT_PUT(trace->cc_prio_map); | |
67 | trace->cc_prio_map = bt_clock_class_priority_map_create(); | |
68 | if (!trace->cc_prio_map) { | |
69 | goto error; | |
70 | } | |
71 | ||
72 | count = bt_ctf_trace_get_clock_class_count(trace->trace); | |
73 | assert(count >= 0); | |
74 | ||
75 | for (i = 0; i < count; i++) { | |
76 | struct bt_ctf_clock_class *clock_class = | |
77 | bt_ctf_trace_get_clock_class_by_index(trace->trace, i); | |
78 | ||
79 | assert(clock_class); | |
80 | ret = bt_clock_class_priority_map_add_clock_class( | |
81 | trace->cc_prio_map, clock_class, 0); | |
82 | BT_PUT(clock_class); | |
83 | ||
84 | if (ret) { | |
85 | goto error; | |
86 | } | |
87 | } | |
88 | ||
89 | goto end; | |
90 | error: | |
91 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
92 | end: | |
93 | return status; | |
94 | } | |
95 | ||
96 | BT_HIDDEN | |
97 | enum bt_ctf_lttng_live_iterator_status lttng_live_metadata_update( | |
98 | struct lttng_live_trace *trace) | |
99 | { | |
100 | struct lttng_live_session *session = trace->session; | |
101 | struct lttng_live_component *lttng_live = session->lttng_live; | |
102 | struct lttng_live_metadata *metadata = trace->metadata; | |
103 | ssize_t ret = 0; | |
104 | size_t size, len_read = 0; | |
105 | char *metadata_buf = NULL; | |
106 | FILE *fp = NULL; | |
107 | enum ctf_metadata_decoder_status decoder_status; | |
108 | enum bt_ctf_lttng_live_iterator_status status = | |
109 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK; | |
110 | ||
111 | /* No metadata stream yet. */ | |
112 | if (!metadata) { | |
113 | if (session->new_streams_needed) { | |
114 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
115 | } else { | |
116 | session->new_streams_needed = true; | |
117 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
118 | } | |
119 | goto end; | |
120 | } | |
121 | ||
122 | if (!trace->new_metadata_needed) { | |
123 | goto end; | |
124 | } | |
125 | ||
126 | /* Open for writing */ | |
127 | fp = bt_open_memstream(&metadata_buf, &size); | |
128 | if (!fp) { | |
129 | PERR("Metadata open_memstream: %s\n", strerror(errno)); | |
130 | goto error; | |
131 | } | |
132 | ||
133 | /* Grab all available metadata. */ | |
134 | do { | |
135 | /* | |
136 | * get_one_metadata_packet returns the number of bytes | |
137 | * received, 0 when we have received everything, a | |
138 | * negative value on error. | |
139 | */ | |
140 | ret = lttng_live_get_one_metadata_packet(trace, fp); | |
141 | if (ret > 0) { | |
142 | len_read += ret; | |
143 | } | |
144 | } while (ret > 0); | |
145 | ||
146 | /* | |
147 | * Consider metadata closed as soon as we get an error reading | |
148 | * it (e.g. cannot be found). | |
149 | */ | |
150 | if (ret < 0) { | |
151 | if (!metadata->closed) { | |
152 | metadata->closed = true; | |
153 | /* | |
154 | * Release our reference on the trace as soon as | |
155 | * we know the metadata stream is not available | |
156 | * anymore. This won't necessarily teardown the | |
157 | * metadata objects immediately, but only when | |
158 | * the data streams are done. | |
159 | */ | |
160 | lttng_live_unref_trace(metadata->trace); | |
161 | } | |
162 | } | |
163 | ||
164 | if (bt_close_memstream(&metadata_buf, &size, fp)) { | |
165 | BT_LOGE("bt_close_memstream: %s", strerror(errno)); | |
166 | } | |
167 | ret = 0; | |
168 | fp = NULL; | |
169 | ||
170 | if (len_read == 0) { | |
171 | if (!trace->trace) { | |
172 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
173 | goto end; | |
174 | } | |
175 | trace->new_metadata_needed = false; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | if (babeltrace_debug) { | |
180 | // yydebug = 1; | |
181 | } | |
182 | ||
183 | fp = bt_fmemopen(metadata_buf, len_read, "rb"); | |
184 | if (!fp) { | |
185 | PERR("Cannot memory-open metadata buffer: %s\n", | |
186 | strerror(errno)); | |
187 | goto error; | |
188 | } | |
189 | ||
190 | decoder_status = ctf_metadata_decoder_decode(metadata->decoder, fp); | |
191 | switch (decoder_status) { | |
192 | case CTF_METADATA_DECODER_STATUS_OK: | |
193 | BT_PUT(trace->trace); | |
194 | trace->trace = ctf_metadata_decoder_get_trace(metadata->decoder); | |
195 | trace->new_metadata_needed = false; | |
196 | status = lttng_live_update_clock_map(trace); | |
197 | if (status != BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK) { | |
198 | goto end; | |
199 | } | |
200 | break; | |
201 | case CTF_METADATA_DECODER_STATUS_INCOMPLETE: | |
202 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
203 | break; | |
204 | case CTF_METADATA_DECODER_STATUS_ERROR: | |
205 | case CTF_METADATA_DECODER_STATUS_INVAL_VERSION: | |
206 | case CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR: | |
207 | goto error; | |
208 | } | |
209 | ||
210 | goto end; | |
211 | error: | |
212 | status = BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR; | |
213 | end: | |
214 | if (fp) { | |
215 | int closeret; | |
216 | ||
217 | closeret = fclose(fp); | |
218 | if (closeret) { | |
219 | PERR("Error on fclose"); | |
220 | } | |
221 | } | |
222 | return status; | |
223 | } | |
224 | ||
225 | BT_HIDDEN | |
226 | int lttng_live_metadata_create_stream(struct lttng_live_session *session, | |
227 | uint64_t ctf_trace_id, | |
228 | uint64_t stream_id) | |
229 | { | |
230 | struct lttng_live_metadata *metadata = NULL; | |
231 | struct lttng_live_trace *trace; | |
232 | ||
233 | metadata = g_new0(struct lttng_live_metadata, 1); | |
234 | if (!metadata) { | |
235 | return -1; | |
236 | } | |
237 | metadata->stream_id = stream_id; | |
238 | //TODO: add clock offset option | |
239 | metadata->decoder = ctf_metadata_decoder_create( | |
240 | session->lttng_live->error_fp, 0); | |
241 | if (!metadata->decoder) { | |
242 | goto error; | |
243 | } | |
244 | trace = lttng_live_ref_trace(session, ctf_trace_id); | |
245 | if (!trace) { | |
246 | goto error; | |
247 | } | |
248 | metadata->trace = trace; | |
249 | trace->metadata = metadata; | |
250 | return 0; | |
251 | ||
252 | error: | |
253 | ctf_metadata_decoder_destroy(metadata->decoder); | |
254 | g_free(metadata); | |
255 | return -1; | |
256 | } | |
257 | ||
258 | BT_HIDDEN | |
259 | void lttng_live_metadata_fini(struct lttng_live_trace *trace) | |
260 | { | |
261 | struct lttng_live_metadata *metadata = trace->metadata; | |
262 | ||
263 | if (!metadata) { | |
264 | return; | |
265 | } | |
266 | if (metadata->text) { | |
267 | free(metadata->text); | |
268 | } | |
269 | ctf_metadata_decoder_destroy(metadata->decoder); | |
270 | trace->metadata = NULL; | |
271 | lttng_live_unref_trace(trace); | |
272 | if (!metadata->closed) { | |
273 | lttng_live_unref_trace(metadata->trace); | |
274 | } | |
275 | g_free(metadata); | |
276 | } |