Commit | Line | Data |
---|---|---|
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 | ||
c802cacb | 10 | #include <glib.h> |
3c22a242 | 11 | #include <inttypes.h> |
7cdc2bab | 12 | #include <stdio.h> |
3c22a242 | 13 | |
3fadfbc0 | 14 | #include <babeltrace2/babeltrace.h> |
3c22a242 | 15 | |
c802cacb SM |
16 | #define BT_COMP_LOG_SELF_COMP self_comp |
17 | #define BT_LOG_OUTPUT_LEVEL log_level | |
18 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/DS" | |
5656cea5 PP |
19 | #include <glib.h> |
20 | #include <inttypes.h> | |
21 | #include <stdio.h> | |
22 | #include <stdlib.h> | |
23 | ||
24 | #include <babeltrace2/babeltrace.h> | |
25 | ||
c802cacb SM |
26 | #include "logging/comp-logging.h" |
27 | ||
578e048b | 28 | #include "common/assert.h" |
83ad336c | 29 | #include "compat/mman.h" /* IWYU pragma: keep */ |
c802cacb | 30 | |
5656cea5 | 31 | #include "../common/src/msg-iter/msg-iter.hpp" |
087cd0f5 | 32 | #include "data-stream.hpp" |
7cdc2bab | 33 | |
4164020e | 34 | #define STREAM_NAME_PREFIX "stream-" |
14f28187 | 35 | |
4164020e SM |
36 | static enum ctf_msg_iter_medium_status medop_request_bytes(size_t request_sz, uint8_t **buffer_addr, |
37 | size_t *buffer_sz, void *data) | |
7cdc2bab | 38 | { |
4164020e SM |
39 | enum ctf_msg_iter_medium_status status = CTF_MSG_ITER_MEDIUM_STATUS_OK; |
40 | lttng_live_stream_iterator *stream = (lttng_live_stream_iterator *) data; | |
41 | struct lttng_live_trace *trace = stream->trace; | |
42 | struct lttng_live_session *session = trace->session; | |
43 | struct lttng_live_msg_iter *live_msg_iter = session->lttng_live_msg_iter; | |
44 | uint64_t recv_len = 0; | |
45 | uint64_t len_left; | |
46 | uint64_t read_len; | |
47 | ||
48 | BT_ASSERT(request_sz); | |
49 | ||
50 | if (stream->has_stream_hung_up) { | |
51 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
52 | goto end; | |
53 | } | |
54 | ||
55 | len_left = stream->base_offset + stream->len - stream->offset; | |
56 | if (!len_left) { | |
57 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
58 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
59 | goto end; | |
60 | } | |
61 | ||
62 | read_len = MIN(request_sz, stream->buflen); | |
63 | read_len = MIN(read_len, len_left); | |
64 | status = lttng_live_get_stream_bytes(live_msg_iter, stream, stream->buf, stream->offset, | |
65 | read_len, &recv_len); | |
66 | *buffer_addr = stream->buf; | |
67 | *buffer_sz = recv_len; | |
68 | stream->offset += recv_len; | |
4a39caef | 69 | end: |
4164020e | 70 | return status; |
7cdc2bab MD |
71 | } |
72 | ||
4164020e | 73 | static bt_stream *medop_borrow_stream(bt_stream_class *stream_class, int64_t stream_id, void *data) |
7cdc2bab | 74 | { |
4164020e SM |
75 | lttng_live_stream_iterator *lttng_live_stream = (lttng_live_stream_iterator *) data; |
76 | bt_logging_level log_level = lttng_live_stream->log_level; | |
77 | bt_self_component *self_comp = lttng_live_stream->self_comp; | |
78 | ||
79 | if (!lttng_live_stream->stream) { | |
80 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); | |
81 | ||
82 | BT_COMP_LOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " | |
83 | "class %" PRId64, | |
84 | lttng_live_stream->name->str, stream_id, stream_class_id); | |
85 | ||
86 | if (stream_id < 0) { | |
87 | /* | |
88 | * No stream instance ID in the stream. It's possible | |
89 | * to encounter this situation with older version of | |
90 | * LTTng. In these cases, use the viewer_stream_id that | |
91 | * is unique for a live viewer session. | |
92 | */ | |
93 | lttng_live_stream->stream = bt_stream_create_with_id( | |
94 | stream_class, lttng_live_stream->trace->trace, lttng_live_stream->viewer_stream_id); | |
95 | } else { | |
96 | lttng_live_stream->stream = bt_stream_create_with_id( | |
97 | stream_class, lttng_live_stream->trace->trace, (uint64_t) stream_id); | |
98 | } | |
99 | ||
100 | if (!lttng_live_stream->stream) { | |
101 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
102 | "Cannot create stream %s (stream class ID " | |
103 | "%" PRId64 ", stream ID %" PRIu64 ")", | |
104 | lttng_live_stream->name->str, stream_class_id, stream_id); | |
105 | goto end; | |
106 | } | |
107 | ||
108 | bt_stream_set_name(lttng_live_stream->stream, lttng_live_stream->name->str); | |
109 | } | |
7cdc2bab | 110 | |
b80991f6 | 111 | end: |
4164020e | 112 | return lttng_live_stream->stream; |
7cdc2bab MD |
113 | } |
114 | ||
18a1979b | 115 | static struct ctf_msg_iter_medium_ops medops = { |
4164020e SM |
116 | medop_request_bytes, |
117 | nullptr, | |
118 | nullptr, | |
119 | medop_borrow_stream, | |
7cdc2bab MD |
120 | }; |
121 | ||
4164020e SM |
122 | enum lttng_live_iterator_status lttng_live_lazy_msg_init(struct lttng_live_session *session, |
123 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 124 | { |
4164020e SM |
125 | struct lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
126 | uint64_t trace_idx, stream_iter_idx; | |
127 | bt_logging_level log_level = session->log_level; | |
128 | bt_self_component *self_comp = session->self_comp; | |
129 | ||
130 | if (!session->lazy_stream_msg_init) { | |
131 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
132 | } | |
133 | ||
134 | BT_COMP_LOGD("Lazily initializing self message iterator for live session: " | |
135 | "session-id=%" PRIu64 ", self-msg-iter-addr=%p", | |
136 | session->id, self_msg_iter); | |
137 | ||
138 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { | |
139 | struct lttng_live_trace *trace = | |
140 | (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx); | |
141 | ||
142 | for (stream_iter_idx = 0; stream_iter_idx < trace->stream_iterators->len; | |
143 | stream_iter_idx++) { | |
144 | struct ctf_trace_class *ctf_tc; | |
145 | struct lttng_live_stream_iterator *stream_iter = | |
146 | (lttng_live_stream_iterator *) g_ptr_array_index(trace->stream_iterators, | |
147 | stream_iter_idx); | |
148 | ||
149 | if (stream_iter->msg_iter) { | |
150 | continue; | |
151 | } | |
152 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder); | |
153 | BT_COMP_LOGD("Creating CTF message iterator: " | |
154 | "session-id=%" PRIu64 ", ctf-tc-addr=%p, " | |
155 | "stream-iter-name=%s, self-msg-iter-addr=%p", | |
156 | session->id, ctf_tc, stream_iter->name->str, self_msg_iter); | |
157 | stream_iter->msg_iter = | |
158 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, | |
159 | log_level, self_comp, self_msg_iter); | |
160 | if (!stream_iter->msg_iter) { | |
161 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to create CTF message iterator"); | |
162 | goto error; | |
163 | } | |
164 | } | |
165 | } | |
166 | ||
167 | session->lazy_stream_msg_init = false; | |
168 | ||
169 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
170 | |
171 | error: | |
4164020e | 172 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
173 | } |
174 | ||
4164020e SM |
175 | struct lttng_live_stream_iterator * |
176 | lttng_live_stream_iterator_create(struct lttng_live_session *session, uint64_t ctf_trace_id, | |
177 | uint64_t stream_id, bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 178 | { |
4164020e SM |
179 | struct lttng_live_stream_iterator *stream_iter; |
180 | struct lttng_live_component *lttng_live; | |
181 | struct lttng_live_trace *trace; | |
182 | bt_logging_level log_level; | |
183 | bt_self_component *self_comp; | |
184 | ||
185 | BT_ASSERT(session); | |
186 | BT_ASSERT(session->lttng_live_msg_iter); | |
187 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
188 | log_level = session->log_level; | |
189 | self_comp = session->self_comp; | |
190 | ||
191 | lttng_live = session->lttng_live_msg_iter->lttng_live_comp; | |
192 | ||
193 | stream_iter = g_new0(struct lttng_live_stream_iterator, 1); | |
194 | if (!stream_iter) { | |
195 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
196 | "Failed to allocate struct lttng_live_stream_iterator"); | |
197 | goto error; | |
198 | } | |
199 | ||
200 | stream_iter->log_level = log_level; | |
201 | stream_iter->self_comp = self_comp; | |
202 | trace = lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); | |
203 | if (!trace) { | |
204 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to borrow CTF trace."); | |
205 | goto error; | |
206 | } | |
207 | ||
208 | stream_iter->trace = trace; | |
209 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
210 | stream_iter->viewer_stream_id = stream_id; | |
211 | ||
212 | stream_iter->ctf_stream_class_id.is_set = false; | |
213 | stream_iter->ctf_stream_class_id.value = UINT64_MAX; | |
214 | ||
215 | stream_iter->last_inactivity_ts.is_set = false; | |
216 | stream_iter->last_inactivity_ts.value = 0; | |
217 | ||
218 | if (trace->trace) { | |
219 | struct ctf_trace_class *ctf_tc = | |
220 | ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder); | |
221 | BT_ASSERT(!stream_iter->msg_iter); | |
222 | stream_iter->msg_iter = | |
223 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, log_level, | |
224 | self_comp, self_msg_iter); | |
225 | if (!stream_iter->msg_iter) { | |
226 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to create CTF message iterator"); | |
227 | goto error; | |
228 | } | |
229 | } | |
230 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); | |
231 | if (!stream_iter->buf) { | |
232 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to allocate live stream iterator buffer"); | |
233 | goto error; | |
234 | } | |
235 | ||
236 | stream_iter->buflen = lttng_live->max_query_size; | |
237 | stream_iter->name = g_string_new(NULL); | |
238 | if (!stream_iter->name) { | |
239 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to allocate live stream iterator name buffer"); | |
240 | goto error; | |
241 | } | |
242 | ||
243 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
244 | stream_iter->viewer_stream_id); | |
245 | g_ptr_array_add(trace->stream_iterators, stream_iter); | |
246 | ||
247 | /* Track the number of active stream iterator. */ | |
248 | session->lttng_live_msg_iter->active_stream_iter++; | |
249 | ||
250 | goto end; | |
7cdc2bab | 251 | error: |
4164020e SM |
252 | lttng_live_stream_iterator_destroy(stream_iter); |
253 | stream_iter = NULL; | |
7cdc2bab | 254 | end: |
4164020e | 255 | return stream_iter; |
7cdc2bab MD |
256 | } |
257 | ||
4164020e | 258 | void lttng_live_stream_iterator_destroy(struct lttng_live_stream_iterator *stream_iter) |
7cdc2bab | 259 | { |
4164020e SM |
260 | if (!stream_iter) { |
261 | return; | |
262 | } | |
7cdc2bab | 263 | |
4164020e SM |
264 | if (stream_iter->stream) { |
265 | BT_STREAM_PUT_REF_AND_RESET(stream_iter->stream); | |
266 | } | |
7cdc2bab | 267 | |
4164020e SM |
268 | if (stream_iter->msg_iter) { |
269 | ctf_msg_iter_destroy(stream_iter->msg_iter); | |
270 | } | |
271 | g_free(stream_iter->buf); | |
272 | if (stream_iter->name) { | |
273 | g_string_free(stream_iter->name, TRUE); | |
274 | } | |
14f28187 | 275 | |
4164020e | 276 | bt_message_put_ref(stream_iter->current_msg); |
14f28187 | 277 | |
4164020e SM |
278 | /* Track the number of active stream iterator. */ |
279 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
14f28187 | 280 | |
4164020e | 281 | g_free(stream_iter); |
7cdc2bab | 282 | } |