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7cdc2bab | 1 | /* |
bb18709b | 2 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
7cdc2bab MD |
3 | * Copyright 2016 - Philippe Proulx <pproulx@efficios.com> |
4 | * Copyright 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
5 | * Copyright 2010-2011 - EfficiOS Inc. and Linux Foundation | |
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 | ||
5278d5ba | 26 | #define BT_COMP_LOG_SELF_COMP self_comp |
1c0ceb65 | 27 | #define BT_LOG_OUTPUT_LEVEL log_level |
b03487ab | 28 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/DS" |
3fa1b6a3 | 29 | #include "logging/comp-logging.h" |
020bc26f | 30 | |
28fb42b4 | 31 | #include <inttypes.h> |
7cdc2bab | 32 | #include <stdio.h> |
7cdc2bab | 33 | #include <stdlib.h> |
28fb42b4 | 34 | |
7cdc2bab | 35 | #include <glib.h> |
28fb42b4 | 36 | |
71c5da58 | 37 | #include <babeltrace2/babeltrace.h> |
28fb42b4 | 38 | |
b09a5592 | 39 | #include "../common/msg-iter/msg-iter.h" |
57952005 | 40 | #include "common/assert.h" |
28fb42b4 | 41 | #include "compat/mman.h" |
087bc060 | 42 | #include "data-stream.h" |
7cdc2bab | 43 | |
bb18709b FD |
44 | #define STREAM_NAME_PREFIX "stream-" |
45 | ||
7cdc2bab | 46 | static |
5d452e1f | 47 | enum ctf_msg_iter_medium_status medop_request_bytes( |
7cdc2bab MD |
48 | size_t request_sz, uint8_t **buffer_addr, |
49 | size_t *buffer_sz, void *data) | |
50 | { | |
5d452e1f SM |
51 | enum ctf_msg_iter_medium_status status = |
52 | CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
7cdc2bab MD |
53 | struct lttng_live_stream_iterator *stream = data; |
54 | struct lttng_live_trace *trace = stream->trace; | |
55 | struct lttng_live_session *session = trace->session; | |
bb18709b | 56 | struct lttng_live_msg_iter *live_msg_iter = session->lttng_live_msg_iter; |
7cdc2bab MD |
57 | uint64_t recv_len = 0; |
58 | uint64_t len_left; | |
59 | uint64_t read_len; | |
7cdc2bab | 60 | |
5b337d32 | 61 | if (stream->has_stream_hung_up) { |
5d452e1f | 62 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; |
5b337d32 FD |
63 | goto end; |
64 | } | |
65 | ||
7cdc2bab MD |
66 | len_left = stream->base_offset + stream->len - stream->offset; |
67 | if (!len_left) { | |
68 | stream->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
5d452e1f | 69 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
5b337d32 | 70 | goto end; |
7cdc2bab | 71 | } |
5b337d32 | 72 | |
7cdc2bab MD |
73 | read_len = MIN(request_sz, stream->buflen); |
74 | read_len = MIN(read_len, len_left); | |
bb18709b | 75 | status = lttng_live_get_stream_bytes(live_msg_iter, |
7cdc2bab MD |
76 | stream, stream->buf, stream->offset, |
77 | read_len, &recv_len); | |
7cdc2bab MD |
78 | *buffer_addr = stream->buf; |
79 | *buffer_sz = recv_len; | |
80 | stream->offset += recv_len; | |
5b337d32 | 81 | end: |
7cdc2bab MD |
82 | return status; |
83 | } | |
84 | ||
85 | static | |
bb18709b FD |
86 | bt_stream *medop_borrow_stream(bt_stream_class *stream_class, |
87 | int64_t stream_id, void *data) | |
7cdc2bab MD |
88 | { |
89 | struct lttng_live_stream_iterator *lttng_live_stream = data; | |
1c0ceb65 | 90 | bt_logging_level log_level = lttng_live_stream->log_level; |
5278d5ba | 91 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
7cdc2bab MD |
92 | |
93 | if (!lttng_live_stream->stream) { | |
bb18709b | 94 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); |
0659c536 | 95 | |
5278d5ba | 96 | BT_COMP_LOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " |
bb18709b FD |
97 | "class %" PRId64, lttng_live_stream->name->str, |
98 | stream_id, stream_class_id); | |
0659c536 | 99 | |
bb18709b FD |
100 | if (stream_id < 0) { |
101 | /* | |
102 | * No stream instance ID in the stream. It's possible | |
103 | * to encounter this situation with older version of | |
104 | * LTTng. In these cases, use the viewer_stream_id that | |
105 | * is unique for a live viewer session. | |
106 | */ | |
107 | lttng_live_stream->stream = bt_stream_create_with_id( | |
108 | stream_class, lttng_live_stream->trace->trace, | |
109 | lttng_live_stream->viewer_stream_id); | |
0659c536 | 110 | } else { |
bb18709b FD |
111 | lttng_live_stream->stream = bt_stream_create_with_id( |
112 | stream_class, lttng_live_stream->trace->trace, | |
113 | (uint64_t) stream_id); | |
0659c536 | 114 | } |
7cdc2bab | 115 | |
7cdc2bab | 116 | if (!lttng_live_stream->stream) { |
f6e2a9d2 FD |
117 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
118 | "Cannot create stream %s (stream class ID " | |
bb18709b FD |
119 | "%" PRId64 ", stream ID %" PRIu64 ")", |
120 | lttng_live_stream->name->str, | |
121 | stream_class_id, stream_id); | |
0fb60f5d | 122 | goto end; |
7cdc2bab | 123 | } |
0fb60f5d | 124 | |
bb18709b FD |
125 | bt_stream_set_name(lttng_live_stream->stream, |
126 | lttng_live_stream->name->str); | |
7cdc2bab MD |
127 | } |
128 | ||
0fb60f5d | 129 | end: |
7cdc2bab MD |
130 | return lttng_live_stream->stream; |
131 | } | |
132 | ||
5d452e1f | 133 | static struct ctf_msg_iter_medium_ops medops = { |
7cdc2bab | 134 | .request_bytes = medop_request_bytes, |
bb18709b FD |
135 | .seek = NULL, |
136 | .borrow_stream = medop_borrow_stream, | |
7cdc2bab MD |
137 | }; |
138 | ||
139 | BT_HIDDEN | |
bb18709b | 140 | enum lttng_live_iterator_status lttng_live_lazy_msg_init( |
2428e031 SM |
141 | struct lttng_live_session *session, |
142 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 143 | { |
bb18709b FD |
144 | struct lttng_live_component *lttng_live = |
145 | session->lttng_live_msg_iter->lttng_live_comp; | |
146 | uint64_t trace_idx, stream_iter_idx; | |
1c0ceb65 | 147 | bt_logging_level log_level = session->log_level; |
5278d5ba | 148 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab | 149 | |
b09a5592 | 150 | if (!session->lazy_stream_msg_init) { |
bb18709b | 151 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
152 | } |
153 | ||
bb18709b FD |
154 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
155 | struct lttng_live_trace *trace = | |
156 | g_ptr_array_index(session->traces, trace_idx); | |
157 | ||
158 | for (stream_iter_idx = 0; | |
159 | stream_iter_idx < trace->stream_iterators->len; | |
160 | stream_iter_idx++) { | |
161 | struct ctf_trace_class *ctf_tc; | |
162 | struct lttng_live_stream_iterator *stream_iter = | |
163 | g_ptr_array_index(trace->stream_iterators, | |
0b6986b4 | 164 | stream_iter_idx); |
7cdc2bab | 165 | |
bb18709b | 166 | if (stream_iter->msg_iter) { |
7cdc2bab MD |
167 | continue; |
168 | } | |
bb18709b | 169 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class( |
0b6986b4 | 170 | trace->metadata->decoder); |
5d452e1f | 171 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, |
0b6986b4 | 172 | lttng_live->max_query_size, medops, stream_iter, |
2428e031 | 173 | log_level, self_comp, self_msg_iter); |
bb18709b | 174 | if (!stream_iter->msg_iter) { |
f6e2a9d2 FD |
175 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
176 | "Failed to create CTF message iterator"); | |
7cdc2bab MD |
177 | goto error; |
178 | } | |
58f3596b | 179 | |
5d452e1f | 180 | ctf_msg_iter_set_emit_stream_end_message( |
58f3596b | 181 | stream_iter->msg_iter, true); |
5d452e1f | 182 | ctf_msg_iter_set_emit_stream_beginning_message( |
58f3596b | 183 | stream_iter->msg_iter, true); |
7cdc2bab MD |
184 | } |
185 | } | |
186 | ||
b09a5592 | 187 | session->lazy_stream_msg_init = false; |
7cdc2bab | 188 | |
bb18709b | 189 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
190 | |
191 | error: | |
bb18709b | 192 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
193 | } |
194 | ||
195 | BT_HIDDEN | |
196 | struct lttng_live_stream_iterator *lttng_live_stream_iterator_create( | |
197 | struct lttng_live_session *session, | |
198 | uint64_t ctf_trace_id, | |
2428e031 SM |
199 | uint64_t stream_id, |
200 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 201 | { |
bb18709b FD |
202 | struct lttng_live_stream_iterator *stream_iter; |
203 | struct lttng_live_component *lttng_live; | |
7cdc2bab | 204 | struct lttng_live_trace *trace; |
1c0ceb65 | 205 | bt_logging_level log_level; |
5278d5ba | 206 | bt_self_component *self_comp; |
7cdc2bab | 207 | |
bb18709b FD |
208 | BT_ASSERT(session); |
209 | BT_ASSERT(session->lttng_live_msg_iter); | |
210 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
1c0ceb65 | 211 | log_level = session->log_level; |
5278d5ba | 212 | self_comp = session->self_comp; |
bb18709b FD |
213 | |
214 | lttng_live = session->lttng_live_msg_iter->lttng_live_comp; | |
215 | ||
216 | stream_iter = g_new0(struct lttng_live_stream_iterator, 1); | |
217 | if (!stream_iter) { | |
f6e2a9d2 FD |
218 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
219 | "Failed to allocate struct lttng_live_stream_iterator"); | |
bb18709b FD |
220 | goto error; |
221 | } | |
222 | ||
1c0ceb65 | 223 | stream_iter->log_level = log_level; |
5278d5ba | 224 | stream_iter->self_comp = self_comp; |
bb18709b | 225 | trace = lttng_live_borrow_trace(session, ctf_trace_id); |
7cdc2bab | 226 | if (!trace) { |
f6e2a9d2 FD |
227 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
228 | "Failed to borrow CTF trace."); | |
7cdc2bab MD |
229 | goto error; |
230 | } | |
231 | ||
bb18709b FD |
232 | stream_iter->trace = trace; |
233 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
234 | stream_iter->viewer_stream_id = stream_id; | |
235 | stream_iter->ctf_stream_class_id = -1ULL; | |
236 | stream_iter->last_inactivity_ts = INT64_MIN; | |
7cdc2bab MD |
237 | |
238 | if (trace->trace) { | |
bb18709b FD |
239 | struct ctf_trace_class *ctf_tc = |
240 | ctf_metadata_decoder_borrow_ctf_trace_class( | |
0b6986b4 | 241 | trace->metadata->decoder); |
bb18709b | 242 | BT_ASSERT(!stream_iter->msg_iter); |
5d452e1f | 243 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, |
0b6986b4 | 244 | lttng_live->max_query_size, medops, stream_iter, |
2428e031 | 245 | log_level, self_comp, self_msg_iter); |
bb18709b | 246 | if (!stream_iter->msg_iter) { |
f6e2a9d2 FD |
247 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
248 | "Failed to create CTF message iterator"); | |
7cdc2bab MD |
249 | goto error; |
250 | } | |
58f3596b | 251 | |
5d452e1f | 252 | ctf_msg_iter_set_emit_stream_end_message( |
58f3596b | 253 | stream_iter->msg_iter, true); |
5d452e1f | 254 | ctf_msg_iter_set_emit_stream_beginning_message( |
58f3596b | 255 | stream_iter->msg_iter, true); |
7cdc2bab | 256 | } |
bb18709b FD |
257 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); |
258 | if (!stream_iter->buf) { | |
f6e2a9d2 FD |
259 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
260 | "Failed to allocate live stream iterator buffer"); | |
bb18709b FD |
261 | goto error; |
262 | } | |
7cdc2bab | 263 | |
bb18709b FD |
264 | stream_iter->buflen = lttng_live->max_query_size; |
265 | stream_iter->name = g_string_new(NULL); | |
266 | if (!stream_iter->name) { | |
f6e2a9d2 FD |
267 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
268 | "Failed to allocate live stream iterator name buffer"); | |
bb18709b FD |
269 | goto error; |
270 | } | |
271 | ||
272 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
0b6986b4 | 273 | stream_iter->viewer_stream_id); |
bb18709b | 274 | g_ptr_array_add(trace->stream_iterators, stream_iter); |
7cdc2bab | 275 | |
bb18709b FD |
276 | /* Track the number of active stream iterator. */ |
277 | session->lttng_live_msg_iter->active_stream_iter++; | |
7cdc2bab MD |
278 | |
279 | goto end; | |
280 | error: | |
bb18709b FD |
281 | lttng_live_stream_iterator_destroy(stream_iter); |
282 | stream_iter = NULL; | |
7cdc2bab | 283 | end: |
bb18709b | 284 | return stream_iter; |
7cdc2bab MD |
285 | } |
286 | ||
287 | BT_HIDDEN | |
bb18709b FD |
288 | void lttng_live_stream_iterator_destroy( |
289 | struct lttng_live_stream_iterator *stream_iter) | |
7cdc2bab | 290 | { |
bb18709b | 291 | if (!stream_iter) { |
7cdc2bab MD |
292 | return; |
293 | } | |
294 | ||
bb18709b FD |
295 | if (stream_iter->stream) { |
296 | BT_STREAM_PUT_REF_AND_RESET(stream_iter->stream); | |
7cdc2bab MD |
297 | } |
298 | ||
bb18709b | 299 | if (stream_iter->msg_iter) { |
5d452e1f | 300 | ctf_msg_iter_destroy(stream_iter->msg_iter); |
7cdc2bab | 301 | } |
be1b2e7e | 302 | g_free(stream_iter->buf); |
bb18709b FD |
303 | if (stream_iter->name) { |
304 | g_string_free(stream_iter->name, TRUE); | |
305 | } | |
306 | ||
307 | bt_message_put_ref(stream_iter->current_msg); | |
308 | ||
309 | /* Track the number of active stream iterator. */ | |
310 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
311 | ||
7cdc2bab MD |
312 | /* |
313 | * Ensure we poke the trace metadata in the future, which is | |
314 | * required to release the metadata reference on the trace. | |
315 | */ | |
bb18709b FD |
316 | stream_iter->trace->new_metadata_needed = true; |
317 | g_free(stream_iter); | |
7cdc2bab | 318 | } |