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 | ||
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 | |
c7e1be4b SM |
16 | #include "plugins/ctf/common/metadata/decoder.hpp" |
17 | ||
c802cacb SM |
18 | #define BT_COMP_LOG_SELF_COMP self_comp |
19 | #define BT_LOG_OUTPUT_LEVEL log_level | |
20 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/DS" | |
21 | #include "logging/comp-logging.h" | |
22 | ||
578e048b | 23 | #include "common/assert.h" |
83ad336c | 24 | #include "compat/mman.h" /* IWYU pragma: keep */ |
c802cacb SM |
25 | |
26 | #include "../common/msg-iter/msg-iter.hpp" | |
087cd0f5 | 27 | #include "data-stream.hpp" |
7cdc2bab | 28 | |
4164020e | 29 | #define STREAM_NAME_PREFIX "stream-" |
14f28187 | 30 | |
4164020e SM |
31 | static enum ctf_msg_iter_medium_status medop_request_bytes(size_t request_sz, uint8_t **buffer_addr, |
32 | size_t *buffer_sz, void *data) | |
7cdc2bab | 33 | { |
4164020e SM |
34 | enum ctf_msg_iter_medium_status status = CTF_MSG_ITER_MEDIUM_STATUS_OK; |
35 | lttng_live_stream_iterator *stream = (lttng_live_stream_iterator *) data; | |
36 | struct lttng_live_trace *trace = stream->trace; | |
37 | struct lttng_live_session *session = trace->session; | |
38 | struct lttng_live_msg_iter *live_msg_iter = session->lttng_live_msg_iter; | |
39 | uint64_t recv_len = 0; | |
40 | uint64_t len_left; | |
41 | uint64_t read_len; | |
42 | ||
43 | BT_ASSERT(request_sz); | |
44 | ||
45 | if (stream->has_stream_hung_up) { | |
46 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
47 | goto end; | |
48 | } | |
49 | ||
50 | len_left = stream->base_offset + stream->len - stream->offset; | |
51 | if (!len_left) { | |
52 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
53 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
54 | goto end; | |
55 | } | |
56 | ||
57 | read_len = MIN(request_sz, stream->buflen); | |
58 | read_len = MIN(read_len, len_left); | |
59 | status = lttng_live_get_stream_bytes(live_msg_iter, stream, stream->buf, stream->offset, | |
60 | read_len, &recv_len); | |
61 | *buffer_addr = stream->buf; | |
62 | *buffer_sz = recv_len; | |
63 | stream->offset += recv_len; | |
4a39caef | 64 | end: |
4164020e | 65 | return status; |
7cdc2bab MD |
66 | } |
67 | ||
4164020e | 68 | static bt_stream *medop_borrow_stream(bt_stream_class *stream_class, int64_t stream_id, void *data) |
7cdc2bab | 69 | { |
4164020e SM |
70 | lttng_live_stream_iterator *lttng_live_stream = (lttng_live_stream_iterator *) data; |
71 | bt_logging_level log_level = lttng_live_stream->log_level; | |
72 | bt_self_component *self_comp = lttng_live_stream->self_comp; | |
73 | ||
74 | if (!lttng_live_stream->stream) { | |
75 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); | |
76 | ||
77 | BT_COMP_LOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " | |
78 | "class %" PRId64, | |
79 | lttng_live_stream->name->str, stream_id, stream_class_id); | |
80 | ||
81 | if (stream_id < 0) { | |
82 | /* | |
83 | * No stream instance ID in the stream. It's possible | |
84 | * to encounter this situation with older version of | |
85 | * LTTng. In these cases, use the viewer_stream_id that | |
86 | * is unique for a live viewer session. | |
87 | */ | |
88 | lttng_live_stream->stream = bt_stream_create_with_id( | |
89 | stream_class, lttng_live_stream->trace->trace, lttng_live_stream->viewer_stream_id); | |
90 | } else { | |
91 | lttng_live_stream->stream = bt_stream_create_with_id( | |
92 | stream_class, lttng_live_stream->trace->trace, (uint64_t) stream_id); | |
93 | } | |
94 | ||
95 | if (!lttng_live_stream->stream) { | |
96 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
97 | "Cannot create stream %s (stream class ID " | |
98 | "%" PRId64 ", stream ID %" PRIu64 ")", | |
99 | lttng_live_stream->name->str, stream_class_id, stream_id); | |
100 | goto end; | |
101 | } | |
102 | ||
103 | bt_stream_set_name(lttng_live_stream->stream, lttng_live_stream->name->str); | |
104 | } | |
7cdc2bab | 105 | |
b80991f6 | 106 | end: |
4164020e | 107 | return lttng_live_stream->stream; |
7cdc2bab MD |
108 | } |
109 | ||
18a1979b | 110 | static struct ctf_msg_iter_medium_ops medops = { |
4164020e SM |
111 | medop_request_bytes, |
112 | nullptr, | |
113 | nullptr, | |
114 | medop_borrow_stream, | |
7cdc2bab MD |
115 | }; |
116 | ||
4164020e SM |
117 | enum lttng_live_iterator_status lttng_live_lazy_msg_init(struct lttng_live_session *session, |
118 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 119 | { |
4164020e SM |
120 | struct lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
121 | uint64_t trace_idx, stream_iter_idx; | |
122 | bt_logging_level log_level = session->log_level; | |
123 | bt_self_component *self_comp = session->self_comp; | |
124 | ||
125 | if (!session->lazy_stream_msg_init) { | |
126 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
127 | } | |
128 | ||
129 | BT_COMP_LOGD("Lazily initializing self message iterator for live session: " | |
130 | "session-id=%" PRIu64 ", self-msg-iter-addr=%p", | |
131 | session->id, self_msg_iter); | |
132 | ||
133 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { | |
134 | struct lttng_live_trace *trace = | |
135 | (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx); | |
136 | ||
137 | for (stream_iter_idx = 0; stream_iter_idx < trace->stream_iterators->len; | |
138 | stream_iter_idx++) { | |
139 | struct ctf_trace_class *ctf_tc; | |
140 | struct lttng_live_stream_iterator *stream_iter = | |
141 | (lttng_live_stream_iterator *) g_ptr_array_index(trace->stream_iterators, | |
142 | stream_iter_idx); | |
143 | ||
144 | if (stream_iter->msg_iter) { | |
145 | continue; | |
146 | } | |
147 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder); | |
148 | BT_COMP_LOGD("Creating CTF message iterator: " | |
149 | "session-id=%" PRIu64 ", ctf-tc-addr=%p, " | |
150 | "stream-iter-name=%s, self-msg-iter-addr=%p", | |
151 | session->id, ctf_tc, stream_iter->name->str, self_msg_iter); | |
152 | stream_iter->msg_iter = | |
153 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, | |
154 | log_level, self_comp, self_msg_iter); | |
155 | if (!stream_iter->msg_iter) { | |
156 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to create CTF message iterator"); | |
157 | goto error; | |
158 | } | |
159 | } | |
160 | } | |
161 | ||
162 | session->lazy_stream_msg_init = false; | |
163 | ||
164 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
165 | |
166 | error: | |
4164020e | 167 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
168 | } |
169 | ||
4164020e SM |
170 | struct lttng_live_stream_iterator * |
171 | lttng_live_stream_iterator_create(struct lttng_live_session *session, uint64_t ctf_trace_id, | |
172 | uint64_t stream_id, bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 173 | { |
4164020e SM |
174 | struct lttng_live_stream_iterator *stream_iter; |
175 | struct lttng_live_component *lttng_live; | |
176 | struct lttng_live_trace *trace; | |
177 | bt_logging_level log_level; | |
178 | bt_self_component *self_comp; | |
179 | ||
180 | BT_ASSERT(session); | |
181 | BT_ASSERT(session->lttng_live_msg_iter); | |
182 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
183 | log_level = session->log_level; | |
184 | self_comp = session->self_comp; | |
185 | ||
186 | lttng_live = session->lttng_live_msg_iter->lttng_live_comp; | |
187 | ||
188 | stream_iter = g_new0(struct lttng_live_stream_iterator, 1); | |
189 | if (!stream_iter) { | |
190 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, | |
191 | "Failed to allocate struct lttng_live_stream_iterator"); | |
192 | goto error; | |
193 | } | |
194 | ||
195 | stream_iter->log_level = log_level; | |
196 | stream_iter->self_comp = self_comp; | |
197 | trace = lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); | |
198 | if (!trace) { | |
199 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to borrow CTF trace."); | |
200 | goto error; | |
201 | } | |
202 | ||
203 | stream_iter->trace = trace; | |
204 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
205 | stream_iter->viewer_stream_id = stream_id; | |
206 | ||
207 | stream_iter->ctf_stream_class_id.is_set = false; | |
208 | stream_iter->ctf_stream_class_id.value = UINT64_MAX; | |
209 | ||
210 | stream_iter->last_inactivity_ts.is_set = false; | |
211 | stream_iter->last_inactivity_ts.value = 0; | |
212 | ||
213 | if (trace->trace) { | |
214 | struct ctf_trace_class *ctf_tc = | |
215 | ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder); | |
216 | BT_ASSERT(!stream_iter->msg_iter); | |
217 | stream_iter->msg_iter = | |
218 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, log_level, | |
219 | self_comp, self_msg_iter); | |
220 | if (!stream_iter->msg_iter) { | |
221 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to create CTF message iterator"); | |
222 | goto error; | |
223 | } | |
224 | } | |
225 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); | |
226 | if (!stream_iter->buf) { | |
227 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to allocate live stream iterator buffer"); | |
228 | goto error; | |
229 | } | |
230 | ||
231 | stream_iter->buflen = lttng_live->max_query_size; | |
232 | stream_iter->name = g_string_new(NULL); | |
233 | if (!stream_iter->name) { | |
234 | BT_COMP_LOGE_APPEND_CAUSE(self_comp, "Failed to allocate live stream iterator name buffer"); | |
235 | goto error; | |
236 | } | |
237 | ||
238 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
239 | stream_iter->viewer_stream_id); | |
240 | g_ptr_array_add(trace->stream_iterators, stream_iter); | |
241 | ||
242 | /* Track the number of active stream iterator. */ | |
243 | session->lttng_live_msg_iter->active_stream_iter++; | |
244 | ||
245 | goto end; | |
7cdc2bab | 246 | error: |
4164020e SM |
247 | lttng_live_stream_iterator_destroy(stream_iter); |
248 | stream_iter = NULL; | |
7cdc2bab | 249 | end: |
4164020e | 250 | return stream_iter; |
7cdc2bab MD |
251 | } |
252 | ||
4164020e | 253 | void lttng_live_stream_iterator_destroy(struct lttng_live_stream_iterator *stream_iter) |
7cdc2bab | 254 | { |
4164020e SM |
255 | if (!stream_iter) { |
256 | return; | |
257 | } | |
7cdc2bab | 258 | |
4164020e SM |
259 | if (stream_iter->stream) { |
260 | BT_STREAM_PUT_REF_AND_RESET(stream_iter->stream); | |
261 | } | |
7cdc2bab | 262 | |
4164020e SM |
263 | if (stream_iter->msg_iter) { |
264 | ctf_msg_iter_destroy(stream_iter->msg_iter); | |
265 | } | |
266 | g_free(stream_iter->buf); | |
267 | if (stream_iter->name) { | |
268 | g_string_free(stream_iter->name, TRUE); | |
269 | } | |
14f28187 | 270 | |
4164020e | 271 | bt_message_put_ref(stream_iter->current_msg); |
14f28187 | 272 | |
4164020e SM |
273 | /* Track the number of active stream iterator. */ |
274 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
14f28187 | 275 | |
4164020e | 276 | g_free(stream_iter); |
7cdc2bab | 277 | } |