Add bt_common_abort() and use it instead of abort() directly
[babeltrace.git] / src / plugins / ctf / lttng-live / metadata.c
1 /*
2 * Copyright 2019 - Francis Deslauriers <francis.deslauriers@efficios.com>
3 * Copyright 2016 - Philippe Proulx <pproulx@efficios.com>
4 * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation
5 *
6 * Some functions are based on older functions written by Mathieu Desnoyers.
7 *
8 * Permission is hereby granted, free of charge, to any person obtaining a copy
9 * of this software and associated documentation files (the "Software"), to deal
10 * in the Software without restriction, including without limitation the rights
11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
12 * copies of the Software, and to permit persons to whom the Software is
13 * furnished to do so, subject to the following conditions:
14 *
15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
24 * SOFTWARE.
25 */
26
27 #define BT_COMP_LOG_SELF_COMP self_comp
28 #define BT_LOG_OUTPUT_LEVEL log_level
29 #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/META"
30 #include "logging/comp-logging.h"
31
32 #include <stdio.h>
33 #include <stdint.h>
34 #include <stdlib.h>
35 #include <stdbool.h>
36 #include <glib.h>
37 #include "compat/memstream.h"
38 #include <babeltrace2/babeltrace.h>
39
40 #include "metadata.h"
41 #include "../common/metadata/decoder.h"
42 #include "../common/metadata/ctf-meta-configure-ir-trace.h"
43
44 #define TSDL_MAGIC 0x75d11d57
45
46 struct packet_header {
47 uint32_t magic;
48 uint8_t uuid[16];
49 uint32_t checksum;
50 uint32_t content_size;
51 uint32_t packet_size;
52 uint8_t compression_scheme;
53 uint8_t encryption_scheme;
54 uint8_t checksum_scheme;
55 uint8_t major;
56 uint8_t minor;
57 } __attribute__((__packed__));
58
59
60 static
61 bool stream_classes_all_have_default_clock_class(bt_trace_class *tc,
62 bt_logging_level log_level,
63 bt_self_component *self_comp)
64 {
65 uint64_t i, sc_count;
66 const bt_clock_class *cc = NULL;
67 const bt_stream_class *sc;
68 bool ret = true;
69
70 sc_count = bt_trace_class_get_stream_class_count(tc);
71 for (i = 0; i < sc_count; i++) {
72 sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
73
74 BT_ASSERT(sc);
75
76 cc = bt_stream_class_borrow_default_clock_class_const(sc);
77 if (!cc) {
78 ret = false;
79 BT_COMP_LOGE_APPEND_CAUSE(self_comp,
80 "Stream class doesn't have a default clock class: "
81 "sc-id=%" PRIu64 ", sc-name=\"%s\"",
82 bt_stream_class_get_id(sc),
83 bt_stream_class_get_name(sc));
84 goto end;
85 }
86 }
87
88 end:
89 return ret;
90 }
91 /*
92 * Iterate over the stream classes and returns the first clock class
93 * encountered. This is useful to create message iterator inactivity message as
94 * we don't need a particular clock class.
95 */
96 static
97 const bt_clock_class *borrow_any_clock_class(bt_trace_class *tc)
98 {
99 uint64_t i, sc_count;
100 const bt_clock_class *cc = NULL;
101 const bt_stream_class *sc;
102
103 sc_count = bt_trace_class_get_stream_class_count(tc);
104 for (i = 0; i < sc_count; i++) {
105 sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i);
106 BT_ASSERT_DBG(sc);
107
108 cc = bt_stream_class_borrow_default_clock_class_const(sc);
109 if (cc) {
110 goto end;
111 }
112 }
113 end:
114 BT_ASSERT_DBG(cc);
115 return cc;
116 }
117
118 BT_HIDDEN
119 enum lttng_live_iterator_status lttng_live_metadata_update(
120 struct lttng_live_trace *trace)
121 {
122 struct lttng_live_session *session = trace->session;
123 struct lttng_live_metadata *metadata = trace->metadata;
124 size_t size, len_read = 0;
125 char *metadata_buf = NULL;
126 bool keep_receiving;
127 FILE *fp = NULL;
128 enum ctf_metadata_decoder_status decoder_status;
129 enum lttng_live_iterator_status status =
130 LTTNG_LIVE_ITERATOR_STATUS_OK;
131 bt_logging_level log_level = trace->log_level;
132 bt_self_component *self_comp = trace->self_comp;
133 enum lttng_live_get_one_metadata_status metadata_status;
134
135 /* No metadata stream yet. */
136 if (!metadata) {
137 if (session->new_streams_needed) {
138 status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
139 } else {
140 session->new_streams_needed = true;
141 status = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE;
142 }
143 goto end;
144 }
145
146 if (!metadata->trace) {
147 trace->new_metadata_needed = false;
148 }
149
150 if (!trace->new_metadata_needed) {
151 goto end;
152 }
153
154 /* Open for writing */
155 fp = bt_open_memstream(&metadata_buf, &size);
156 if (!fp) {
157 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
158 "Metadata open_memstream", ".");
159 goto error;
160 }
161
162 keep_receiving = true;
163 /* Grab all available metadata. */
164 while (keep_receiving) {
165 size_t reply_len = 0;
166 /*
167 * lttng_live_get_one_metadata_packet() asks the Relay Daemon
168 * for new metadata. If new metadata is received, the function
169 * writes it to the provided file handle and updates the
170 * reply_len output parameter. We call this function in loop
171 * until it returns _END meaning that no new metadata is
172 * available.
173 * We may receive a _CLOSED status if the metadata stream we
174 * are requesting is no longer available on the relay.
175 * If we receive an _ERROR status, it means there was a
176 * networking, allocating, or some other unrecoverable error.
177 */
178 metadata_status = lttng_live_get_one_metadata_packet(trace, fp,
179 &reply_len);
180
181 switch (metadata_status) {
182 case LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK:
183 len_read += reply_len;
184 break;
185 case LTTNG_LIVE_GET_ONE_METADATA_STATUS_END:
186 keep_receiving = false;
187 break;
188 case LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED:
189 keep_receiving = false;
190 break;
191 case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR:
192 goto error;
193 default:
194 bt_common_abort();
195 }
196 }
197
198 /*
199 * A closed metadata stream means the trace is no longer active. Return
200 * _END so that the caller can remove the trace from its list.
201 */
202 if (metadata_status == LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED) {
203 status = LTTNG_LIVE_ITERATOR_STATUS_END;
204 goto end;
205 }
206
207 if (bt_close_memstream(&metadata_buf, &size, fp)) {
208 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
209 "Metadata bt_close_memstream", ".");
210 }
211
212 fp = NULL;
213
214 if (len_read == 0) {
215 if (!trace->trace) {
216 status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
217 goto end;
218 }
219 trace->new_metadata_needed = false;
220 goto end;
221 }
222
223 fp = bt_fmemopen(metadata_buf, len_read, "rb");
224 if (!fp) {
225 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
226 "Cannot memory-open metadata buffer", ".");
227 goto error;
228 }
229
230 /*
231 * The call to ctf_metadata_decoder_append_content() will append
232 * new metadata to our current trace class.
233 */
234 decoder_status = ctf_metadata_decoder_append_content(
235 metadata->decoder, fp);
236 switch (decoder_status) {
237 case CTF_METADATA_DECODER_STATUS_OK:
238 if (!trace->trace_class) {
239 struct ctf_trace_class *tc =
240 ctf_metadata_decoder_borrow_ctf_trace_class(
241 metadata->decoder);
242
243 trace->trace_class =
244 ctf_metadata_decoder_get_ir_trace_class(
245 metadata->decoder);
246 trace->trace = bt_trace_create(trace->trace_class);
247 if (!trace->trace) {
248 BT_COMP_LOGE_APPEND_CAUSE(self_comp,
249 "Failed to create bt_trace");
250 goto error;
251 }
252 if (ctf_trace_class_configure_ir_trace(tc,
253 trace->trace)) {
254 BT_COMP_LOGE_APPEND_CAUSE(self_comp,
255 "Failed to configure ctf trace class");
256 goto error;
257 }
258 if (!stream_classes_all_have_default_clock_class(
259 trace->trace_class, log_level,
260 self_comp)) {
261 /* Error logged in function. */
262 goto error;
263 }
264 trace->clock_class =
265 borrow_any_clock_class(trace->trace_class);
266 }
267 trace->new_metadata_needed = false;
268
269 break;
270 case CTF_METADATA_DECODER_STATUS_INCOMPLETE:
271 status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
272 break;
273 default:
274 goto error;
275 }
276
277 goto end;
278
279 error:
280 if (errno == EINTR) {
281 if (lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) {
282 status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN;
283 }
284 } else {
285 status = LTTNG_LIVE_ITERATOR_STATUS_ERROR;
286 }
287 end:
288 if (fp) {
289 int closeret;
290
291 closeret = fclose(fp);
292 if (closeret) {
293 BT_COMP_LOGE_APPEND_CAUSE_ERRNO(self_comp,
294 "Error on fclose", ".");
295 }
296 }
297 free(metadata_buf);
298 return status;
299 }
300
301 BT_HIDDEN
302 int lttng_live_metadata_create_stream(struct lttng_live_session *session,
303 uint64_t ctf_trace_id, uint64_t stream_id,
304 const char *trace_name)
305 {
306 bt_self_component *self_comp = session->self_comp;
307 bt_logging_level log_level = session->log_level;
308 struct lttng_live_metadata *metadata = NULL;
309 struct lttng_live_trace *trace;
310 struct ctf_metadata_decoder_config cfg = {
311 .log_level = session->log_level,
312 .self_comp = session->self_comp,
313 .clock_class_offset_s = 0,
314 .clock_class_offset_ns = 0,
315 .create_trace_class = true,
316 };
317
318 metadata = g_new0(struct lttng_live_metadata, 1);
319 if (!metadata) {
320 return -1;
321 }
322 metadata->log_level = session->log_level;
323 metadata->self_comp = session->self_comp;
324 metadata->stream_id = stream_id;
325
326 metadata->decoder = ctf_metadata_decoder_create(&cfg);
327 if (!metadata->decoder) {
328 BT_COMP_LOGE_APPEND_CAUSE(self_comp,
329 "Failed to create CTF metadata decoder");
330 goto error;
331 }
332 trace = lttng_live_borrow_trace(session, ctf_trace_id);
333 if (!trace) {
334 BT_COMP_LOGE_APPEND_CAUSE(self_comp,
335 "Failed to borrow trace");
336 goto error;
337 }
338 metadata->trace = trace;
339 trace->metadata = metadata;
340 return 0;
341
342 error:
343 ctf_metadata_decoder_destroy(metadata->decoder);
344 g_free(metadata);
345 return -1;
346 }
347
348 BT_HIDDEN
349 void lttng_live_metadata_fini(struct lttng_live_trace *trace)
350 {
351 struct lttng_live_metadata *metadata = trace->metadata;
352
353 if (!metadata) {
354 return;
355 }
356 ctf_metadata_decoder_destroy(metadata->decoder);
357 trace->metadata = NULL;
358 g_free(metadata);
359 }
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