Commit | Line | Data |
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7cdc2bab | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
7cdc2bab | 3 | * |
0235b0db MJ |
4 | * Copyright 2019 Francis Deslauriers <francis.deslauriers@efficios.com> |
5 | * Copyright 2016 Philippe Proulx <pproulx@efficios.com> | |
6 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
7 | * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation | |
7cdc2bab MD |
8 | */ |
9 | ||
2ece7dd0 | 10 | #define BT_COMP_LOG_SELF_COMP self_comp |
c01594de | 11 | #define BT_LOG_OUTPUT_LEVEL log_level |
350ad6c1 | 12 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/DS" |
d9c39b0a | 13 | #include "logging/comp-logging.h" |
020bc26f | 14 | |
3c22a242 | 15 | #include <inttypes.h> |
7cdc2bab | 16 | #include <stdio.h> |
7cdc2bab | 17 | #include <stdlib.h> |
3c22a242 | 18 | |
7cdc2bab | 19 | #include <glib.h> |
3c22a242 | 20 | |
3fadfbc0 | 21 | #include <babeltrace2/babeltrace.h> |
3c22a242 | 22 | |
d6e69534 | 23 | #include "../common/msg-iter/msg-iter.h" |
578e048b | 24 | #include "common/assert.h" |
3c22a242 | 25 | #include "compat/mman.h" |
087bc060 | 26 | #include "data-stream.h" |
7cdc2bab | 27 | |
14f28187 FD |
28 | #define STREAM_NAME_PREFIX "stream-" |
29 | ||
7cdc2bab | 30 | static |
18a1979b | 31 | enum ctf_msg_iter_medium_status medop_request_bytes( |
7cdc2bab MD |
32 | size_t request_sz, uint8_t **buffer_addr, |
33 | size_t *buffer_sz, void *data) | |
34 | { | |
18a1979b SM |
35 | enum ctf_msg_iter_medium_status status = |
36 | CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
7cdc2bab MD |
37 | struct lttng_live_stream_iterator *stream = data; |
38 | struct lttng_live_trace *trace = stream->trace; | |
39 | struct lttng_live_session *session = trace->session; | |
14f28187 | 40 | struct lttng_live_msg_iter *live_msg_iter = session->lttng_live_msg_iter; |
7cdc2bab MD |
41 | uint64_t recv_len = 0; |
42 | uint64_t len_left; | |
43 | uint64_t read_len; | |
7cdc2bab | 44 | |
c9694de4 SM |
45 | BT_ASSERT(request_sz); |
46 | ||
4a39caef | 47 | if (stream->has_stream_hung_up) { |
18a1979b | 48 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; |
4a39caef FD |
49 | goto end; |
50 | } | |
51 | ||
7cdc2bab MD |
52 | len_left = stream->base_offset + stream->len - stream->offset; |
53 | if (!len_left) { | |
34533ae0 FD |
54 | lttng_live_stream_iterator_set_state(stream, |
55 | LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
18a1979b | 56 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
4a39caef | 57 | goto end; |
7cdc2bab | 58 | } |
4a39caef | 59 | |
7cdc2bab MD |
60 | read_len = MIN(request_sz, stream->buflen); |
61 | read_len = MIN(read_len, len_left); | |
14f28187 | 62 | status = lttng_live_get_stream_bytes(live_msg_iter, |
7cdc2bab MD |
63 | stream, stream->buf, stream->offset, |
64 | read_len, &recv_len); | |
7cdc2bab MD |
65 | *buffer_addr = stream->buf; |
66 | *buffer_sz = recv_len; | |
67 | stream->offset += recv_len; | |
4a39caef | 68 | end: |
7cdc2bab MD |
69 | return status; |
70 | } | |
71 | ||
72 | static | |
14f28187 FD |
73 | bt_stream *medop_borrow_stream(bt_stream_class *stream_class, |
74 | int64_t stream_id, void *data) | |
7cdc2bab MD |
75 | { |
76 | struct lttng_live_stream_iterator *lttng_live_stream = data; | |
c01594de | 77 | bt_logging_level log_level = lttng_live_stream->log_level; |
2ece7dd0 | 78 | bt_self_component *self_comp = lttng_live_stream->self_comp; |
7cdc2bab MD |
79 | |
80 | if (!lttng_live_stream->stream) { | |
14f28187 | 81 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); |
b92735af | 82 | |
2ece7dd0 | 83 | BT_COMP_LOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " |
14f28187 FD |
84 | "class %" PRId64, lttng_live_stream->name->str, |
85 | stream_id, stream_class_id); | |
b92735af | 86 | |
14f28187 FD |
87 | if (stream_id < 0) { |
88 | /* | |
89 | * No stream instance ID in the stream. It's possible | |
90 | * to encounter this situation with older version of | |
91 | * LTTng. In these cases, use the viewer_stream_id that | |
92 | * is unique for a live viewer session. | |
93 | */ | |
94 | lttng_live_stream->stream = bt_stream_create_with_id( | |
95 | stream_class, lttng_live_stream->trace->trace, | |
96 | lttng_live_stream->viewer_stream_id); | |
b92735af | 97 | } else { |
14f28187 FD |
98 | lttng_live_stream->stream = bt_stream_create_with_id( |
99 | stream_class, lttng_live_stream->trace->trace, | |
100 | (uint64_t) stream_id); | |
b92735af | 101 | } |
7cdc2bab | 102 | |
7cdc2bab | 103 | if (!lttng_live_stream->stream) { |
1419db2b FD |
104 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
105 | "Cannot create stream %s (stream class ID " | |
14f28187 FD |
106 | "%" PRId64 ", stream ID %" PRIu64 ")", |
107 | lttng_live_stream->name->str, | |
108 | stream_class_id, stream_id); | |
b80991f6 | 109 | goto end; |
7cdc2bab | 110 | } |
b80991f6 | 111 | |
14f28187 FD |
112 | bt_stream_set_name(lttng_live_stream->stream, |
113 | lttng_live_stream->name->str); | |
7cdc2bab MD |
114 | } |
115 | ||
b80991f6 | 116 | end: |
7cdc2bab MD |
117 | return lttng_live_stream->stream; |
118 | } | |
119 | ||
18a1979b | 120 | static struct ctf_msg_iter_medium_ops medops = { |
7cdc2bab | 121 | .request_bytes = medop_request_bytes, |
14f28187 FD |
122 | .seek = NULL, |
123 | .borrow_stream = medop_borrow_stream, | |
7cdc2bab MD |
124 | }; |
125 | ||
126 | BT_HIDDEN | |
14f28187 | 127 | enum lttng_live_iterator_status lttng_live_lazy_msg_init( |
851de941 SM |
128 | struct lttng_live_session *session, |
129 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 130 | { |
14f28187 FD |
131 | struct lttng_live_component *lttng_live = |
132 | session->lttng_live_msg_iter->lttng_live_comp; | |
133 | uint64_t trace_idx, stream_iter_idx; | |
c01594de | 134 | bt_logging_level log_level = session->log_level; |
2ece7dd0 | 135 | bt_self_component *self_comp = session->self_comp; |
7cdc2bab | 136 | |
d6e69534 | 137 | if (!session->lazy_stream_msg_init) { |
14f28187 | 138 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
139 | } |
140 | ||
ecb4ba8a FD |
141 | BT_COMP_LOGD("Lazily initializing self message iterator for live session: " |
142 | "session-id=%"PRIu64", self-msg-iter-addr=%p", session->id, | |
143 | self_msg_iter); | |
144 | ||
14f28187 FD |
145 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
146 | struct lttng_live_trace *trace = | |
147 | g_ptr_array_index(session->traces, trace_idx); | |
148 | ||
149 | for (stream_iter_idx = 0; | |
150 | stream_iter_idx < trace->stream_iterators->len; | |
151 | stream_iter_idx++) { | |
152 | struct ctf_trace_class *ctf_tc; | |
153 | struct lttng_live_stream_iterator *stream_iter = | |
154 | g_ptr_array_index(trace->stream_iterators, | |
0f1979c3 | 155 | stream_iter_idx); |
7cdc2bab | 156 | |
14f28187 | 157 | if (stream_iter->msg_iter) { |
7cdc2bab MD |
158 | continue; |
159 | } | |
14f28187 | 160 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class( |
0f1979c3 | 161 | trace->metadata->decoder); |
ecb4ba8a FD |
162 | BT_COMP_LOGD("Creating CTF message iterator: " |
163 | "session-id=%"PRIu64", ctf-tc-addr=%p, " | |
164 | "stream-iter-name=%s, self-msg-iter-addr=%p", | |
165 | session->id, ctf_tc, stream_iter->name->str, self_msg_iter); | |
18a1979b | 166 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, |
0f1979c3 | 167 | lttng_live->max_query_size, medops, stream_iter, |
851de941 | 168 | log_level, self_comp, self_msg_iter); |
14f28187 | 169 | if (!stream_iter->msg_iter) { |
1419db2b FD |
170 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
171 | "Failed to create CTF message iterator"); | |
7cdc2bab MD |
172 | goto error; |
173 | } | |
174 | } | |
175 | } | |
176 | ||
d6e69534 | 177 | session->lazy_stream_msg_init = false; |
7cdc2bab | 178 | |
14f28187 | 179 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
180 | |
181 | error: | |
14f28187 | 182 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
183 | } |
184 | ||
185 | BT_HIDDEN | |
186 | struct lttng_live_stream_iterator *lttng_live_stream_iterator_create( | |
187 | struct lttng_live_session *session, | |
188 | uint64_t ctf_trace_id, | |
851de941 SM |
189 | uint64_t stream_id, |
190 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 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) { | |
1419db2b FD |
208 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
209 | "Failed to allocate struct lttng_live_stream_iterator"); | |
14f28187 FD |
210 | goto error; |
211 | } | |
212 | ||
c01594de | 213 | stream_iter->log_level = log_level; |
2ece7dd0 | 214 | stream_iter->self_comp = self_comp; |
36e94ad6 | 215 | trace = lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); |
7cdc2bab | 216 | if (!trace) { |
1419db2b FD |
217 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
218 | "Failed to borrow CTF trace."); | |
7cdc2bab MD |
219 | goto error; |
220 | } | |
221 | ||
14f28187 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; | |
a043c362 FD |
226 | stream_iter->last_inactivity_ts.is_set = false; |
227 | stream_iter->last_inactivity_ts.value = 0; | |
7cdc2bab MD |
228 | |
229 | if (trace->trace) { | |
14f28187 FD |
230 | struct ctf_trace_class *ctf_tc = |
231 | ctf_metadata_decoder_borrow_ctf_trace_class( | |
0f1979c3 | 232 | trace->metadata->decoder); |
14f28187 | 233 | BT_ASSERT(!stream_iter->msg_iter); |
18a1979b | 234 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, |
0f1979c3 | 235 | lttng_live->max_query_size, medops, stream_iter, |
851de941 | 236 | log_level, self_comp, self_msg_iter); |
14f28187 | 237 | if (!stream_iter->msg_iter) { |
1419db2b FD |
238 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
239 | "Failed to create CTF message iterator"); | |
7cdc2bab MD |
240 | goto error; |
241 | } | |
242 | } | |
14f28187 FD |
243 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); |
244 | if (!stream_iter->buf) { | |
1419db2b FD |
245 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
246 | "Failed to allocate live stream iterator buffer"); | |
14f28187 FD |
247 | goto error; |
248 | } | |
7cdc2bab | 249 | |
14f28187 FD |
250 | stream_iter->buflen = lttng_live->max_query_size; |
251 | stream_iter->name = g_string_new(NULL); | |
252 | if (!stream_iter->name) { | |
1419db2b FD |
253 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, |
254 | "Failed to allocate live stream iterator name buffer"); | |
14f28187 FD |
255 | goto error; |
256 | } | |
257 | ||
258 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
0f1979c3 | 259 | stream_iter->viewer_stream_id); |
14f28187 | 260 | g_ptr_array_add(trace->stream_iterators, stream_iter); |
7cdc2bab | 261 | |
14f28187 FD |
262 | /* Track the number of active stream iterator. */ |
263 | session->lttng_live_msg_iter->active_stream_iter++; | |
7cdc2bab MD |
264 | |
265 | goto end; | |
266 | error: | |
14f28187 FD |
267 | lttng_live_stream_iterator_destroy(stream_iter); |
268 | stream_iter = NULL; | |
7cdc2bab | 269 | end: |
14f28187 | 270 | return stream_iter; |
7cdc2bab MD |
271 | } |
272 | ||
273 | BT_HIDDEN | |
14f28187 FD |
274 | void lttng_live_stream_iterator_destroy( |
275 | struct lttng_live_stream_iterator *stream_iter) | |
7cdc2bab | 276 | { |
14f28187 | 277 | if (!stream_iter) { |
7cdc2bab MD |
278 | return; |
279 | } | |
280 | ||
14f28187 FD |
281 | if (stream_iter->stream) { |
282 | BT_STREAM_PUT_REF_AND_RESET(stream_iter->stream); | |
7cdc2bab MD |
283 | } |
284 | ||
14f28187 | 285 | if (stream_iter->msg_iter) { |
18a1979b | 286 | ctf_msg_iter_destroy(stream_iter->msg_iter); |
7cdc2bab | 287 | } |
19bbdc9b | 288 | g_free(stream_iter->buf); |
14f28187 FD |
289 | if (stream_iter->name) { |
290 | g_string_free(stream_iter->name, TRUE); | |
291 | } | |
292 | ||
293 | bt_message_put_ref(stream_iter->current_msg); | |
294 | ||
295 | /* Track the number of active stream iterator. */ | |
296 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
297 | ||
14f28187 | 298 | g_free(stream_iter); |
7cdc2bab | 299 | } |