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