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7cdc2bab | 1 | /* |
14f28187 | 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 | ||
2ece7dd0 | 26 | #define BT_COMP_LOG_SELF_COMP self_comp |
c01594de | 27 | #define BT_LOG_OUTPUT_LEVEL log_level |
350ad6c1 | 28 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/DS" |
d9c39b0a | 29 | #include "logging/comp-logging.h" |
020bc26f | 30 | |
7cdc2bab MD |
31 | #include <stdio.h> |
32 | #include <stdint.h> | |
33 | #include <stdlib.h> | |
34 | #include <stdbool.h> | |
35 | #include <glib.h> | |
36 | #include <inttypes.h> | |
578e048b | 37 | #include "compat/mman.h" |
3fadfbc0 | 38 | #include <babeltrace2/babeltrace.h> |
d6e69534 | 39 | #include "../common/msg-iter/msg-iter.h" |
578e048b | 40 | #include "common/assert.h" |
7cdc2bab | 41 | |
087bc060 | 42 | #include "data-stream.h" |
7cdc2bab | 43 | |
14f28187 FD |
44 | #define STREAM_NAME_PREFIX "stream-" |
45 | ||
7cdc2bab | 46 | static |
d6e69534 | 47 | enum bt_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 | { | |
d6e69534 PP |
51 | enum bt_msg_iter_medium_status status = |
52 | BT_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; | |
14f28187 | 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 | |
4a39caef FD |
61 | if (stream->has_stream_hung_up) { |
62 | status = BT_MSG_ITER_MEDIUM_STATUS_EOF; | |
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; | |
d6e69534 | 69 | status = BT_MSG_ITER_MEDIUM_STATUS_AGAIN; |
4a39caef | 70 | goto end; |
7cdc2bab | 71 | } |
4a39caef | 72 | |
7cdc2bab MD |
73 | read_len = MIN(request_sz, stream->buflen); |
74 | read_len = MIN(read_len, len_left); | |
14f28187 | 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; | |
4a39caef | 81 | end: |
7cdc2bab MD |
82 | return status; |
83 | } | |
84 | ||
85 | static | |
14f28187 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; | |
c01594de | 90 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 91 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
7cdc2bab MD |
92 | |
93 | if (!lttng_live_stream->stream) { | |
14f28187 | 94 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); |
b92735af | 95 | |
2ece7dd0 | 96 | BT_COMP_LOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " |
14f28187 FD |
97 | "class %" PRId64, lttng_live_stream->name->str, |
98 | stream_id, stream_class_id); | |
b92735af | 99 | |
14f28187 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); | |
b92735af | 110 | } else { |
14f28187 FD |
111 | lttng_live_stream->stream = bt_stream_create_with_id( |
112 | stream_class, lttng_live_stream->trace->trace, | |
113 | (uint64_t) stream_id); | |
b92735af | 114 | } |
7cdc2bab | 115 | |
7cdc2bab | 116 | if (!lttng_live_stream->stream) { |
2ece7dd0 | 117 | BT_COMP_LOGE("Cannot create stream %s (stream class ID " |
14f28187 FD |
118 | "%" PRId64 ", stream ID %" PRIu64 ")", |
119 | lttng_live_stream->name->str, | |
120 | stream_class_id, stream_id); | |
b80991f6 | 121 | goto end; |
7cdc2bab | 122 | } |
b80991f6 | 123 | |
14f28187 FD |
124 | bt_stream_set_name(lttng_live_stream->stream, |
125 | lttng_live_stream->name->str); | |
7cdc2bab MD |
126 | } |
127 | ||
b80991f6 | 128 | end: |
7cdc2bab MD |
129 | return lttng_live_stream->stream; |
130 | } | |
131 | ||
d6e69534 | 132 | static struct bt_msg_iter_medium_ops medops = { |
7cdc2bab | 133 | .request_bytes = medop_request_bytes, |
14f28187 FD |
134 | .seek = NULL, |
135 | .borrow_stream = medop_borrow_stream, | |
7cdc2bab MD |
136 | }; |
137 | ||
138 | BT_HIDDEN | |
14f28187 | 139 | enum lttng_live_iterator_status lttng_live_lazy_msg_init( |
7cdc2bab MD |
140 | struct lttng_live_session *session) |
141 | { | |
14f28187 FD |
142 | struct lttng_live_component *lttng_live = |
143 | session->lttng_live_msg_iter->lttng_live_comp; | |
144 | uint64_t trace_idx, stream_iter_idx; | |
c01594de | 145 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 146 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab | 147 | |
d6e69534 | 148 | if (!session->lazy_stream_msg_init) { |
14f28187 | 149 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
150 | } |
151 | ||
14f28187 FD |
152 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
153 | struct lttng_live_trace *trace = | |
154 | g_ptr_array_index(session->traces, trace_idx); | |
155 | ||
156 | for (stream_iter_idx = 0; | |
157 | stream_iter_idx < trace->stream_iterators->len; | |
158 | stream_iter_idx++) { | |
159 | struct ctf_trace_class *ctf_tc; | |
160 | struct lttng_live_stream_iterator *stream_iter = | |
161 | g_ptr_array_index(trace->stream_iterators, | |
162 | stream_iter_idx); | |
7cdc2bab | 163 | |
14f28187 | 164 | if (stream_iter->msg_iter) { |
7cdc2bab MD |
165 | continue; |
166 | } | |
14f28187 FD |
167 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class( |
168 | trace->metadata->decoder); | |
169 | stream_iter->msg_iter = bt_msg_iter_create(ctf_tc, | |
7cdc2bab | 170 | lttng_live->max_query_size, medops, |
2ece7dd0 | 171 | stream_iter, log_level, self_comp); |
14f28187 | 172 | if (!stream_iter->msg_iter) { |
7cdc2bab MD |
173 | goto error; |
174 | } | |
175 | } | |
176 | } | |
177 | ||
d6e69534 | 178 | session->lazy_stream_msg_init = false; |
7cdc2bab | 179 | |
14f28187 | 180 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
181 | |
182 | error: | |
14f28187 | 183 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
184 | } |
185 | ||
186 | BT_HIDDEN | |
187 | struct lttng_live_stream_iterator *lttng_live_stream_iterator_create( | |
188 | struct lttng_live_session *session, | |
189 | uint64_t ctf_trace_id, | |
190 | uint64_t stream_id) | |
191 | { | |
14f28187 FD |
192 | struct lttng_live_stream_iterator *stream_iter; |
193 | struct lttng_live_component *lttng_live; | |
7cdc2bab | 194 | struct lttng_live_trace *trace; |
c01594de | 195 | bt_logging_level log_level; |
2ece7dd0 | 196 | bt_self_component *self_comp; |
7cdc2bab | 197 | |
14f28187 FD |
198 | BT_ASSERT(session); |
199 | BT_ASSERT(session->lttng_live_msg_iter); | |
200 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
c01594de | 201 | log_level = session->log_level; |
2ece7dd0 | 202 | self_comp = session->self_comp; |
14f28187 FD |
203 | |
204 | lttng_live = session->lttng_live_msg_iter->lttng_live_comp; | |
205 | ||
206 | stream_iter = g_new0(struct lttng_live_stream_iterator, 1); | |
207 | if (!stream_iter) { | |
208 | goto error; | |
209 | } | |
210 | ||
c01594de | 211 | stream_iter->log_level = log_level; |
2ece7dd0 | 212 | stream_iter->self_comp = self_comp; |
14f28187 | 213 | trace = lttng_live_borrow_trace(session, ctf_trace_id); |
7cdc2bab MD |
214 | if (!trace) { |
215 | goto error; | |
216 | } | |
217 | ||
14f28187 FD |
218 | stream_iter->trace = trace; |
219 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
220 | stream_iter->viewer_stream_id = stream_id; | |
221 | stream_iter->ctf_stream_class_id = -1ULL; | |
222 | stream_iter->last_inactivity_ts = INT64_MIN; | |
7cdc2bab MD |
223 | |
224 | if (trace->trace) { | |
14f28187 FD |
225 | struct ctf_trace_class *ctf_tc = |
226 | ctf_metadata_decoder_borrow_ctf_trace_class( | |
227 | trace->metadata->decoder); | |
228 | BT_ASSERT(!stream_iter->msg_iter); | |
229 | stream_iter->msg_iter = bt_msg_iter_create(ctf_tc, | |
7cdc2bab | 230 | lttng_live->max_query_size, medops, |
2ece7dd0 | 231 | stream_iter, log_level, self_comp); |
14f28187 | 232 | if (!stream_iter->msg_iter) { |
7cdc2bab MD |
233 | goto error; |
234 | } | |
235 | } | |
14f28187 FD |
236 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); |
237 | if (!stream_iter->buf) { | |
238 | goto error; | |
239 | } | |
7cdc2bab | 240 | |
14f28187 FD |
241 | stream_iter->buflen = lttng_live->max_query_size; |
242 | stream_iter->name = g_string_new(NULL); | |
243 | if (!stream_iter->name) { | |
244 | goto error; | |
245 | } | |
246 | ||
247 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
248 | stream_iter->viewer_stream_id); | |
249 | g_ptr_array_add(trace->stream_iterators, stream_iter); | |
7cdc2bab | 250 | |
14f28187 FD |
251 | /* Track the number of active stream iterator. */ |
252 | session->lttng_live_msg_iter->active_stream_iter++; | |
7cdc2bab MD |
253 | |
254 | goto end; | |
255 | error: | |
14f28187 FD |
256 | lttng_live_stream_iterator_destroy(stream_iter); |
257 | stream_iter = NULL; | |
7cdc2bab | 258 | end: |
14f28187 | 259 | return stream_iter; |
7cdc2bab MD |
260 | } |
261 | ||
262 | BT_HIDDEN | |
14f28187 FD |
263 | void lttng_live_stream_iterator_destroy( |
264 | struct lttng_live_stream_iterator *stream_iter) | |
7cdc2bab | 265 | { |
14f28187 | 266 | if (!stream_iter) { |
7cdc2bab MD |
267 | return; |
268 | } | |
269 | ||
14f28187 FD |
270 | if (stream_iter->stream) { |
271 | BT_STREAM_PUT_REF_AND_RESET(stream_iter->stream); | |
7cdc2bab MD |
272 | } |
273 | ||
14f28187 FD |
274 | if (stream_iter->msg_iter) { |
275 | bt_msg_iter_destroy(stream_iter->msg_iter); | |
7cdc2bab | 276 | } |
19bbdc9b | 277 | g_free(stream_iter->buf); |
14f28187 FD |
278 | if (stream_iter->name) { |
279 | g_string_free(stream_iter->name, TRUE); | |
280 | } | |
281 | ||
282 | bt_message_put_ref(stream_iter->current_msg); | |
283 | ||
284 | /* Track the number of active stream iterator. */ | |
285 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
286 | ||
7cdc2bab MD |
287 | /* |
288 | * Ensure we poke the trace metadata in the future, which is | |
289 | * required to release the metadata reference on the trace. | |
290 | */ | |
14f28187 FD |
291 | stream_iter->trace->new_metadata_needed = true; |
292 | g_free(stream_iter); | |
7cdc2bab | 293 | } |