Commit | Line | Data |
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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 | ||
350ad6c1 | 26 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/DS" |
020bc26f PP |
27 | #include "logging.h" |
28 | ||
7cdc2bab MD |
29 | #include <stdio.h> |
30 | #include <stdint.h> | |
31 | #include <stdlib.h> | |
32 | #include <stdbool.h> | |
33 | #include <glib.h> | |
34 | #include <inttypes.h> | |
578e048b | 35 | #include "compat/mman.h" |
3fadfbc0 | 36 | #include <babeltrace2/babeltrace.h> |
d6e69534 | 37 | #include "../common/msg-iter/msg-iter.h" |
578e048b | 38 | #include "common/assert.h" |
7cdc2bab | 39 | |
087bc060 | 40 | #include "data-stream.h" |
7cdc2bab | 41 | |
14f28187 FD |
42 | #define STREAM_NAME_PREFIX "stream-" |
43 | ||
7cdc2bab | 44 | static |
d6e69534 | 45 | enum bt_msg_iter_medium_status medop_request_bytes( |
7cdc2bab MD |
46 | size_t request_sz, uint8_t **buffer_addr, |
47 | size_t *buffer_sz, void *data) | |
48 | { | |
d6e69534 PP |
49 | enum bt_msg_iter_medium_status status = |
50 | BT_MSG_ITER_MEDIUM_STATUS_OK; | |
7cdc2bab MD |
51 | struct lttng_live_stream_iterator *stream = data; |
52 | struct lttng_live_trace *trace = stream->trace; | |
53 | struct lttng_live_session *session = trace->session; | |
14f28187 | 54 | struct lttng_live_msg_iter *live_msg_iter = session->lttng_live_msg_iter; |
7cdc2bab MD |
55 | uint64_t recv_len = 0; |
56 | uint64_t len_left; | |
57 | uint64_t read_len; | |
7cdc2bab MD |
58 | |
59 | len_left = stream->base_offset + stream->len - stream->offset; | |
60 | if (!len_left) { | |
61 | stream->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
d6e69534 | 62 | status = BT_MSG_ITER_MEDIUM_STATUS_AGAIN; |
7cdc2bab MD |
63 | return status; |
64 | } | |
65 | read_len = MIN(request_sz, stream->buflen); | |
66 | read_len = MIN(read_len, len_left); | |
14f28187 | 67 | status = lttng_live_get_stream_bytes(live_msg_iter, |
7cdc2bab MD |
68 | stream, stream->buf, stream->offset, |
69 | read_len, &recv_len); | |
7cdc2bab MD |
70 | *buffer_addr = stream->buf; |
71 | *buffer_sz = recv_len; | |
72 | stream->offset += recv_len; | |
73 | return status; | |
74 | } | |
75 | ||
76 | static | |
14f28187 FD |
77 | bt_stream *medop_borrow_stream(bt_stream_class *stream_class, |
78 | int64_t stream_id, void *data) | |
7cdc2bab MD |
79 | { |
80 | struct lttng_live_stream_iterator *lttng_live_stream = data; | |
7cdc2bab MD |
81 | |
82 | if (!lttng_live_stream->stream) { | |
14f28187 | 83 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); |
b92735af | 84 | |
3f7d4d90 | 85 | BT_LOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " |
14f28187 FD |
86 | "class %" PRId64, lttng_live_stream->name->str, |
87 | stream_id, stream_class_id); | |
b92735af | 88 | |
14f28187 FD |
89 | if (stream_id < 0) { |
90 | /* | |
91 | * No stream instance ID in the stream. It's possible | |
92 | * to encounter this situation with older version of | |
93 | * LTTng. In these cases, use the viewer_stream_id that | |
94 | * is unique for a live viewer session. | |
95 | */ | |
96 | lttng_live_stream->stream = bt_stream_create_with_id( | |
97 | stream_class, lttng_live_stream->trace->trace, | |
98 | lttng_live_stream->viewer_stream_id); | |
b92735af | 99 | } else { |
14f28187 FD |
100 | lttng_live_stream->stream = bt_stream_create_with_id( |
101 | stream_class, lttng_live_stream->trace->trace, | |
102 | (uint64_t) stream_id); | |
b92735af | 103 | } |
7cdc2bab | 104 | |
7cdc2bab | 105 | if (!lttng_live_stream->stream) { |
14f28187 FD |
106 | BT_LOGE("Cannot create stream %s (stream class ID " |
107 | "%" PRId64 ", stream ID %" PRIu64 ")", | |
108 | lttng_live_stream->name->str, | |
109 | stream_class_id, stream_id); | |
7cdc2bab | 110 | } |
14f28187 FD |
111 | bt_stream_set_name(lttng_live_stream->stream, |
112 | lttng_live_stream->name->str); | |
7cdc2bab MD |
113 | } |
114 | ||
115 | return lttng_live_stream->stream; | |
116 | } | |
117 | ||
d6e69534 | 118 | static struct bt_msg_iter_medium_ops medops = { |
7cdc2bab | 119 | .request_bytes = medop_request_bytes, |
14f28187 FD |
120 | .seek = NULL, |
121 | .borrow_stream = medop_borrow_stream, | |
7cdc2bab MD |
122 | }; |
123 | ||
124 | BT_HIDDEN | |
14f28187 | 125 | enum lttng_live_iterator_status lttng_live_lazy_msg_init( |
7cdc2bab MD |
126 | struct lttng_live_session *session) |
127 | { | |
14f28187 FD |
128 | struct lttng_live_component *lttng_live = |
129 | session->lttng_live_msg_iter->lttng_live_comp; | |
130 | uint64_t trace_idx, stream_iter_idx; | |
7cdc2bab | 131 | |
d6e69534 | 132 | if (!session->lazy_stream_msg_init) { |
14f28187 | 133 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
134 | } |
135 | ||
14f28187 FD |
136 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { |
137 | struct lttng_live_trace *trace = | |
138 | g_ptr_array_index(session->traces, trace_idx); | |
139 | ||
140 | for (stream_iter_idx = 0; | |
141 | stream_iter_idx < trace->stream_iterators->len; | |
142 | stream_iter_idx++) { | |
143 | struct ctf_trace_class *ctf_tc; | |
144 | struct lttng_live_stream_iterator *stream_iter = | |
145 | g_ptr_array_index(trace->stream_iterators, | |
146 | stream_iter_idx); | |
7cdc2bab | 147 | |
14f28187 | 148 | if (stream_iter->msg_iter) { |
7cdc2bab MD |
149 | continue; |
150 | } | |
14f28187 FD |
151 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class( |
152 | trace->metadata->decoder); | |
153 | stream_iter->msg_iter = bt_msg_iter_create(ctf_tc, | |
7cdc2bab | 154 | lttng_live->max_query_size, medops, |
ea14c7dd | 155 | stream_iter, BT_LOG_OUTPUT_LEVEL); |
14f28187 | 156 | if (!stream_iter->msg_iter) { |
7cdc2bab MD |
157 | goto error; |
158 | } | |
159 | } | |
160 | } | |
161 | ||
d6e69534 | 162 | session->lazy_stream_msg_init = false; |
7cdc2bab | 163 | |
14f28187 | 164 | return LTTNG_LIVE_ITERATOR_STATUS_OK; |
7cdc2bab MD |
165 | |
166 | error: | |
14f28187 | 167 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
168 | } |
169 | ||
170 | BT_HIDDEN | |
171 | struct lttng_live_stream_iterator *lttng_live_stream_iterator_create( | |
172 | struct lttng_live_session *session, | |
173 | uint64_t ctf_trace_id, | |
174 | uint64_t stream_id) | |
175 | { | |
14f28187 FD |
176 | struct lttng_live_stream_iterator *stream_iter; |
177 | struct lttng_live_component *lttng_live; | |
7cdc2bab | 178 | struct lttng_live_trace *trace; |
7cdc2bab | 179 | |
14f28187 FD |
180 | BT_ASSERT(session); |
181 | BT_ASSERT(session->lttng_live_msg_iter); | |
182 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
183 | ||
184 | lttng_live = session->lttng_live_msg_iter->lttng_live_comp; | |
185 | ||
186 | stream_iter = g_new0(struct lttng_live_stream_iterator, 1); | |
187 | if (!stream_iter) { | |
188 | goto error; | |
189 | } | |
190 | ||
191 | trace = lttng_live_borrow_trace(session, ctf_trace_id); | |
7cdc2bab MD |
192 | if (!trace) { |
193 | goto error; | |
194 | } | |
195 | ||
14f28187 FD |
196 | stream_iter->trace = trace; |
197 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
198 | stream_iter->viewer_stream_id = stream_id; | |
199 | stream_iter->ctf_stream_class_id = -1ULL; | |
200 | stream_iter->last_inactivity_ts = INT64_MIN; | |
7cdc2bab MD |
201 | |
202 | if (trace->trace) { | |
14f28187 FD |
203 | struct ctf_trace_class *ctf_tc = |
204 | ctf_metadata_decoder_borrow_ctf_trace_class( | |
205 | trace->metadata->decoder); | |
206 | BT_ASSERT(!stream_iter->msg_iter); | |
207 | stream_iter->msg_iter = bt_msg_iter_create(ctf_tc, | |
7cdc2bab | 208 | lttng_live->max_query_size, medops, |
ea14c7dd | 209 | stream_iter, BT_LOG_OUTPUT_LEVEL); |
14f28187 | 210 | if (!stream_iter->msg_iter) { |
7cdc2bab MD |
211 | goto error; |
212 | } | |
213 | } | |
14f28187 FD |
214 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); |
215 | if (!stream_iter->buf) { | |
216 | goto error; | |
217 | } | |
7cdc2bab | 218 | |
14f28187 FD |
219 | stream_iter->buflen = lttng_live->max_query_size; |
220 | stream_iter->name = g_string_new(NULL); | |
221 | if (!stream_iter->name) { | |
222 | goto error; | |
223 | } | |
224 | ||
225 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
226 | stream_iter->viewer_stream_id); | |
227 | g_ptr_array_add(trace->stream_iterators, stream_iter); | |
7cdc2bab | 228 | |
14f28187 FD |
229 | /* Track the number of active stream iterator. */ |
230 | session->lttng_live_msg_iter->active_stream_iter++; | |
7cdc2bab MD |
231 | |
232 | goto end; | |
233 | error: | |
14f28187 FD |
234 | lttng_live_stream_iterator_destroy(stream_iter); |
235 | stream_iter = NULL; | |
7cdc2bab | 236 | end: |
14f28187 | 237 | return stream_iter; |
7cdc2bab MD |
238 | } |
239 | ||
240 | BT_HIDDEN | |
14f28187 FD |
241 | void lttng_live_stream_iterator_destroy( |
242 | struct lttng_live_stream_iterator *stream_iter) | |
7cdc2bab | 243 | { |
14f28187 | 244 | if (!stream_iter) { |
7cdc2bab MD |
245 | return; |
246 | } | |
247 | ||
14f28187 FD |
248 | if (stream_iter->stream) { |
249 | BT_STREAM_PUT_REF_AND_RESET(stream_iter->stream); | |
7cdc2bab MD |
250 | } |
251 | ||
14f28187 FD |
252 | if (stream_iter->msg_iter) { |
253 | bt_msg_iter_destroy(stream_iter->msg_iter); | |
7cdc2bab | 254 | } |
14f28187 FD |
255 | if (stream_iter->buf) { |
256 | g_free(stream_iter->buf); | |
257 | } | |
258 | if (stream_iter->name) { | |
259 | g_string_free(stream_iter->name, TRUE); | |
260 | } | |
261 | ||
262 | bt_message_put_ref(stream_iter->current_msg); | |
263 | ||
264 | /* Track the number of active stream iterator. */ | |
265 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
266 | ||
7cdc2bab MD |
267 | /* |
268 | * Ensure we poke the trace metadata in the future, which is | |
269 | * required to release the metadata reference on the trace. | |
270 | */ | |
14f28187 FD |
271 | stream_iter->trace->new_metadata_needed = true; |
272 | g_free(stream_iter); | |
7cdc2bab | 273 | } |