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