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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 | |
3c22a242 | 31 | #include <inttypes.h> |
7cdc2bab | 32 | #include <stdio.h> |
7cdc2bab | 33 | #include <stdlib.h> |
3c22a242 | 34 | |
7cdc2bab | 35 | #include <glib.h> |
3c22a242 | 36 | |
3fadfbc0 | 37 | #include <babeltrace2/babeltrace.h> |
3c22a242 | 38 | |
d6e69534 | 39 | #include "../common/msg-iter/msg-iter.h" |
578e048b | 40 | #include "common/assert.h" |
3c22a242 | 41 | #include "compat/mman.h" |
087bc060 | 42 | #include "data-stream.h" |
7cdc2bab | 43 | |
14f28187 FD |
44 | #define STREAM_NAME_PREFIX "stream-" |
45 | ||
7cdc2bab | 46 | static |
18a1979b | 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 | { | |
18a1979b 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; | |
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 | |
c9694de4 SM |
61 | BT_ASSERT(request_sz); |
62 | ||
4a39caef | 63 | if (stream->has_stream_hung_up) { |
18a1979b | 64 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; |
4a39caef FD |
65 | goto end; |
66 | } | |
67 | ||
7cdc2bab MD |
68 | len_left = stream->base_offset + stream->len - stream->offset; |
69 | if (!len_left) { | |
70 | stream->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
18a1979b | 71 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
4a39caef | 72 | goto end; |
7cdc2bab | 73 | } |
4a39caef | 74 | |
7cdc2bab MD |
75 | read_len = MIN(request_sz, stream->buflen); |
76 | read_len = MIN(read_len, len_left); | |
14f28187 | 77 | status = lttng_live_get_stream_bytes(live_msg_iter, |
7cdc2bab MD |
78 | stream, stream->buf, stream->offset, |
79 | read_len, &recv_len); | |
7cdc2bab MD |
80 | *buffer_addr = stream->buf; |
81 | *buffer_sz = recv_len; | |
82 | stream->offset += recv_len; | |
4a39caef | 83 | end: |
7cdc2bab MD |
84 | return status; |
85 | } | |
86 | ||
87 | static | |
14f28187 FD |
88 | bt_stream *medop_borrow_stream(bt_stream_class *stream_class, |
89 | int64_t stream_id, void *data) | |
7cdc2bab MD |
90 | { |
91 | struct lttng_live_stream_iterator *lttng_live_stream = data; | |
c01594de | 92 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 93 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
7cdc2bab MD |
94 | |
95 | if (!lttng_live_stream->stream) { | |
14f28187 | 96 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); |
b92735af | 97 | |
2ece7dd0 | 98 | BT_COMP_LOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " |
14f28187 FD |
99 | "class %" PRId64, lttng_live_stream->name->str, |
100 | stream_id, stream_class_id); | |
b92735af | 101 | |
14f28187 FD |
102 | if (stream_id < 0) { |
103 | /* | |
104 | * No stream instance ID in the stream. It's possible | |
105 | * to encounter this situation with older version of | |
106 | * LTTng. In these cases, use the viewer_stream_id that | |
107 | * is unique for a live viewer session. | |
108 | */ | |
109 | lttng_live_stream->stream = bt_stream_create_with_id( | |
110 | stream_class, lttng_live_stream->trace->trace, | |
111 | lttng_live_stream->viewer_stream_id); | |
b92735af | 112 | } else { |
14f28187 FD |
113 | lttng_live_stream->stream = bt_stream_create_with_id( |
114 | stream_class, lttng_live_stream->trace->trace, | |
115 | (uint64_t) stream_id); | |
b92735af | 116 | } |
7cdc2bab | 117 | |
7cdc2bab | 118 | if (!lttng_live_stream->stream) { |
1419db2b FD |
119 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
120 | "Cannot create stream %s (stream class ID " | |
14f28187 FD |
121 | "%" PRId64 ", stream ID %" PRIu64 ")", |
122 | lttng_live_stream->name->str, | |
123 | stream_class_id, stream_id); | |
b80991f6 | 124 | goto end; |
7cdc2bab | 125 | } |
b80991f6 | 126 | |
14f28187 FD |
127 | bt_stream_set_name(lttng_live_stream->stream, |
128 | lttng_live_stream->name->str); | |
7cdc2bab MD |
129 | } |
130 | ||
b80991f6 | 131 | end: |
7cdc2bab MD |
132 | return lttng_live_stream->stream; |
133 | } | |
134 | ||
18a1979b | 135 | static struct ctf_msg_iter_medium_ops medops = { |
7cdc2bab | 136 | .request_bytes = medop_request_bytes, |
14f28187 FD |
137 | .seek = NULL, |
138 | .borrow_stream = medop_borrow_stream, | |
7cdc2bab MD |
139 | }; |
140 | ||
141 | BT_HIDDEN | |
14f28187 | 142 | enum lttng_live_iterator_status lttng_live_lazy_msg_init( |
851de941 SM |
143 | struct lttng_live_session *session, |
144 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 145 | { |
14f28187 FD |
146 | struct lttng_live_component *lttng_live = |
147 | session->lttng_live_msg_iter->lttng_live_comp; | |
148 | uint64_t trace_idx, stream_iter_idx; | |
c01594de | 149 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 150 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab | 151 | |
d6e69534 | 152 | if (!session->lazy_stream_msg_init) { |
14f28187 | 153 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
154 | } |
155 | ||
ecb4ba8a FD |
156 | BT_COMP_LOGD("Lazily initializing self message iterator for live session: " |
157 | "session-id=%"PRIu64", self-msg-iter-addr=%p", session->id, | |
158 | self_msg_iter); | |
159 | ||
14f28187 FD |
160 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
161 | struct lttng_live_trace *trace = | |
162 | g_ptr_array_index(session->traces, trace_idx); | |
163 | ||
164 | for (stream_iter_idx = 0; | |
165 | stream_iter_idx < trace->stream_iterators->len; | |
166 | stream_iter_idx++) { | |
167 | struct ctf_trace_class *ctf_tc; | |
168 | struct lttng_live_stream_iterator *stream_iter = | |
169 | g_ptr_array_index(trace->stream_iterators, | |
0f1979c3 | 170 | stream_iter_idx); |
7cdc2bab | 171 | |
14f28187 | 172 | if (stream_iter->msg_iter) { |
7cdc2bab MD |
173 | continue; |
174 | } | |
14f28187 | 175 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class( |
0f1979c3 | 176 | trace->metadata->decoder); |
ecb4ba8a FD |
177 | BT_COMP_LOGD("Creating CTF message iterator: " |
178 | "session-id=%"PRIu64", ctf-tc-addr=%p, " | |
179 | "stream-iter-name=%s, self-msg-iter-addr=%p", | |
180 | session->id, ctf_tc, stream_iter->name->str, self_msg_iter); | |
18a1979b | 181 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, |
0f1979c3 | 182 | lttng_live->max_query_size, medops, stream_iter, |
851de941 | 183 | log_level, self_comp, self_msg_iter); |
14f28187 | 184 | if (!stream_iter->msg_iter) { |
1419db2b FD |
185 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
186 | "Failed to create CTF message iterator"); | |
7cdc2bab MD |
187 | goto error; |
188 | } | |
189 | } | |
190 | } | |
191 | ||
d6e69534 | 192 | session->lazy_stream_msg_init = false; |
7cdc2bab | 193 | |
14f28187 | 194 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
195 | |
196 | error: | |
14f28187 | 197 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
198 | } |
199 | ||
200 | BT_HIDDEN | |
201 | struct lttng_live_stream_iterator *lttng_live_stream_iterator_create( | |
202 | struct lttng_live_session *session, | |
203 | uint64_t ctf_trace_id, | |
851de941 SM |
204 | uint64_t stream_id, |
205 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 206 | { |
14f28187 FD |
207 | struct lttng_live_stream_iterator *stream_iter; |
208 | struct lttng_live_component *lttng_live; | |
7cdc2bab | 209 | struct lttng_live_trace *trace; |
c01594de | 210 | bt_logging_level log_level; |
2ece7dd0 | 211 | bt_self_component *self_comp; |
7cdc2bab | 212 | |
14f28187 FD |
213 | BT_ASSERT(session); |
214 | BT_ASSERT(session->lttng_live_msg_iter); | |
215 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
c01594de | 216 | log_level = session->log_level; |
2ece7dd0 | 217 | self_comp = session->self_comp; |
14f28187 FD |
218 | |
219 | lttng_live = session->lttng_live_msg_iter->lttng_live_comp; | |
220 | ||
221 | stream_iter = g_new0(struct lttng_live_stream_iterator, 1); | |
222 | if (!stream_iter) { | |
1419db2b FD |
223 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
224 | "Failed to allocate struct lttng_live_stream_iterator"); | |
14f28187 FD |
225 | goto error; |
226 | } | |
227 | ||
c01594de | 228 | stream_iter->log_level = log_level; |
2ece7dd0 | 229 | stream_iter->self_comp = self_comp; |
36e94ad6 | 230 | trace = lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); |
7cdc2bab | 231 | if (!trace) { |
1419db2b FD |
232 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
233 | "Failed to borrow CTF trace."); | |
7cdc2bab MD |
234 | goto error; |
235 | } | |
236 | ||
14f28187 FD |
237 | stream_iter->trace = trace; |
238 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
239 | stream_iter->viewer_stream_id = stream_id; | |
240 | stream_iter->ctf_stream_class_id = -1ULL; | |
241 | stream_iter->last_inactivity_ts = INT64_MIN; | |
7cdc2bab MD |
242 | |
243 | if (trace->trace) { | |
14f28187 FD |
244 | struct ctf_trace_class *ctf_tc = |
245 | ctf_metadata_decoder_borrow_ctf_trace_class( | |
0f1979c3 | 246 | trace->metadata->decoder); |
14f28187 | 247 | BT_ASSERT(!stream_iter->msg_iter); |
18a1979b | 248 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, |
0f1979c3 | 249 | lttng_live->max_query_size, medops, stream_iter, |
851de941 | 250 | log_level, self_comp, self_msg_iter); |
14f28187 | 251 | if (!stream_iter->msg_iter) { |
1419db2b FD |
252 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
253 | "Failed to create CTF message iterator"); | |
7cdc2bab MD |
254 | goto error; |
255 | } | |
256 | } | |
14f28187 FD |
257 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); |
258 | if (!stream_iter->buf) { | |
1419db2b FD |
259 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
260 | "Failed to allocate live stream iterator buffer"); | |
14f28187 FD |
261 | goto error; |
262 | } | |
7cdc2bab | 263 | |
14f28187 FD |
264 | stream_iter->buflen = lttng_live->max_query_size; |
265 | stream_iter->name = g_string_new(NULL); | |
266 | if (!stream_iter->name) { | |
1419db2b FD |
267 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
268 | "Failed to allocate live stream iterator name buffer"); | |
14f28187 FD |
269 | goto error; |
270 | } | |
271 | ||
272 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
0f1979c3 | 273 | stream_iter->viewer_stream_id); |
14f28187 | 274 | g_ptr_array_add(trace->stream_iterators, stream_iter); |
7cdc2bab | 275 | |
14f28187 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: | |
14f28187 FD |
281 | lttng_live_stream_iterator_destroy(stream_iter); |
282 | stream_iter = NULL; | |
7cdc2bab | 283 | end: |
14f28187 | 284 | return stream_iter; |
7cdc2bab MD |
285 | } |
286 | ||
287 | BT_HIDDEN | |
14f28187 FD |
288 | void lttng_live_stream_iterator_destroy( |
289 | struct lttng_live_stream_iterator *stream_iter) | |
7cdc2bab | 290 | { |
14f28187 | 291 | if (!stream_iter) { |
7cdc2bab MD |
292 | return; |
293 | } | |
294 | ||
14f28187 FD |
295 | if (stream_iter->stream) { |
296 | BT_STREAM_PUT_REF_AND_RESET(stream_iter->stream); | |
7cdc2bab MD |
297 | } |
298 | ||
14f28187 | 299 | if (stream_iter->msg_iter) { |
18a1979b | 300 | ctf_msg_iter_destroy(stream_iter->msg_iter); |
7cdc2bab | 301 | } |
19bbdc9b | 302 | g_free(stream_iter->buf); |
14f28187 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 | ||
14f28187 | 312 | g_free(stream_iter); |
7cdc2bab | 313 | } |