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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> |
5656cea5 PP |
13 | #include <stdlib.h> |
14 | ||
15 | #include <babeltrace2/babeltrace.h> | |
16 | ||
578e048b | 17 | #include "common/assert.h" |
83ad336c | 18 | #include "compat/mman.h" /* IWYU pragma: keep */ |
0f5c5d5c | 19 | #include "cpp-common/vendor/fmt/format.h" |
c802cacb | 20 | |
5656cea5 | 21 | #include "../common/src/msg-iter/msg-iter.hpp" |
087cd0f5 | 22 | #include "data-stream.hpp" |
7cdc2bab | 23 | |
4164020e | 24 | #define STREAM_NAME_PREFIX "stream-" |
14f28187 | 25 | |
4164020e SM |
26 | static enum ctf_msg_iter_medium_status medop_request_bytes(size_t request_sz, uint8_t **buffer_addr, |
27 | size_t *buffer_sz, void *data) | |
7cdc2bab | 28 | { |
4164020e SM |
29 | enum ctf_msg_iter_medium_status status = CTF_MSG_ITER_MEDIUM_STATUS_OK; |
30 | lttng_live_stream_iterator *stream = (lttng_live_stream_iterator *) data; | |
31 | struct lttng_live_trace *trace = stream->trace; | |
32 | struct lttng_live_session *session = trace->session; | |
33 | struct lttng_live_msg_iter *live_msg_iter = session->lttng_live_msg_iter; | |
34 | uint64_t recv_len = 0; | |
35 | uint64_t len_left; | |
36 | uint64_t read_len; | |
37 | ||
38 | BT_ASSERT(request_sz); | |
39 | ||
40 | if (stream->has_stream_hung_up) { | |
41 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
42 | goto end; | |
43 | } | |
44 | ||
45 | len_left = stream->base_offset + stream->len - stream->offset; | |
46 | if (!len_left) { | |
47 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
48 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
49 | goto end; | |
50 | } | |
51 | ||
52 | read_len = MIN(request_sz, stream->buflen); | |
53 | read_len = MIN(read_len, len_left); | |
54 | status = lttng_live_get_stream_bytes(live_msg_iter, stream, stream->buf, stream->offset, | |
55 | read_len, &recv_len); | |
56 | *buffer_addr = stream->buf; | |
57 | *buffer_sz = recv_len; | |
58 | stream->offset += recv_len; | |
4a39caef | 59 | end: |
4164020e | 60 | return status; |
7cdc2bab MD |
61 | } |
62 | ||
4164020e | 63 | static bt_stream *medop_borrow_stream(bt_stream_class *stream_class, int64_t stream_id, void *data) |
7cdc2bab | 64 | { |
4164020e | 65 | lttng_live_stream_iterator *lttng_live_stream = (lttng_live_stream_iterator *) data; |
4164020e SM |
66 | |
67 | if (!lttng_live_stream->stream) { | |
68 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); | |
69 | ||
0f5c5d5c SM |
70 | BT_CPPLOGI_SPEC(lttng_live_stream->logger, |
71 | "Creating stream {} (ID: {}) out of stream class {}", | |
72 | lttng_live_stream->name->str, stream_id, stream_class_id); | |
4164020e | 73 | |
0b68f2bc SM |
74 | bt_stream *stream; |
75 | ||
4164020e SM |
76 | if (stream_id < 0) { |
77 | /* | |
78 | * No stream instance ID in the stream. It's possible | |
79 | * to encounter this situation with older version of | |
80 | * LTTng. In these cases, use the viewer_stream_id that | |
81 | * is unique for a live viewer session. | |
82 | */ | |
0b68f2bc | 83 | stream = |
7916e7eb SM |
84 | bt_stream_create_with_id(stream_class, lttng_live_stream->trace->trace->libObjPtr(), |
85 | lttng_live_stream->viewer_stream_id); | |
4164020e | 86 | } else { |
0b68f2bc | 87 | stream = bt_stream_create_with_id( |
7916e7eb | 88 | stream_class, lttng_live_stream->trace->trace->libObjPtr(), (uint64_t) stream_id); |
4164020e SM |
89 | } |
90 | ||
0b68f2bc | 91 | if (!stream) { |
0f5c5d5c SM |
92 | BT_CPPLOGE_APPEND_CAUSE_SPEC( |
93 | lttng_live_stream->logger, | |
94 | "Cannot create stream {} (stream class ID {}, stream ID {})", | |
95 | lttng_live_stream->name->str, stream_class_id, stream_id); | |
0b68f2bc | 96 | return nullptr; |
4164020e SM |
97 | } |
98 | ||
0b68f2bc SM |
99 | lttng_live_stream->stream = bt2::Stream::Shared::createWithoutRef(stream); |
100 | lttng_live_stream->stream->name(lttng_live_stream->name->str); | |
4164020e | 101 | } |
7cdc2bab | 102 | |
0b68f2bc | 103 | return lttng_live_stream->stream->libObjPtr(); |
7cdc2bab MD |
104 | } |
105 | ||
18a1979b | 106 | static struct ctf_msg_iter_medium_ops medops = { |
4164020e SM |
107 | medop_request_bytes, |
108 | nullptr, | |
109 | nullptr, | |
110 | medop_borrow_stream, | |
7cdc2bab MD |
111 | }; |
112 | ||
4164020e SM |
113 | enum lttng_live_iterator_status lttng_live_lazy_msg_init(struct lttng_live_session *session, |
114 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 115 | { |
4164020e SM |
116 | struct lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
117 | uint64_t trace_idx, stream_iter_idx; | |
4164020e SM |
118 | |
119 | if (!session->lazy_stream_msg_init) { | |
120 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
121 | } | |
122 | ||
0f5c5d5c SM |
123 | BT_CPPLOGD_SPEC(session->logger, |
124 | "Lazily initializing self message iterator for live session: " | |
125 | "session-id={}, self-msg-iter-addr={}", | |
126 | session->id, fmt::ptr(self_msg_iter)); | |
4164020e SM |
127 | |
128 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { | |
129 | struct lttng_live_trace *trace = | |
130 | (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx); | |
131 | ||
132 | for (stream_iter_idx = 0; stream_iter_idx < trace->stream_iterators->len; | |
133 | stream_iter_idx++) { | |
134 | struct ctf_trace_class *ctf_tc; | |
135 | struct lttng_live_stream_iterator *stream_iter = | |
136 | (lttng_live_stream_iterator *) g_ptr_array_index(trace->stream_iterators, | |
137 | stream_iter_idx); | |
138 | ||
139 | if (stream_iter->msg_iter) { | |
140 | continue; | |
141 | } | |
1fa280c9 | 142 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
0f5c5d5c SM |
143 | BT_CPPLOGD_SPEC(stream_iter->logger, |
144 | "Creating CTF message iterator: session-id={}, ctf-tc-addr={}, " | |
145 | "stream-iter-name={}, self-msg-iter-addr={}", | |
146 | session->id, fmt::ptr(ctf_tc), stream_iter->name->str, | |
147 | fmt::ptr(self_msg_iter)); | |
4164020e SM |
148 | stream_iter->msg_iter = |
149 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, | |
2d5d8c7b | 150 | self_msg_iter, stream_iter->logger); |
4164020e | 151 | if (!stream_iter->msg_iter) { |
0f5c5d5c SM |
152 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
153 | "Failed to create CTF message iterator"); | |
4164020e SM |
154 | goto error; |
155 | } | |
156 | } | |
157 | } | |
158 | ||
159 | session->lazy_stream_msg_init = false; | |
160 | ||
161 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
162 | |
163 | error: | |
4164020e | 164 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
165 | } |
166 | ||
4164020e SM |
167 | struct lttng_live_stream_iterator * |
168 | lttng_live_stream_iterator_create(struct lttng_live_session *session, uint64_t ctf_trace_id, | |
169 | uint64_t stream_id, bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 170 | { |
0f5c5d5c | 171 | lttng_live_stream_iterator *stream_iter = nullptr; |
4164020e SM |
172 | |
173 | BT_ASSERT(session); | |
174 | BT_ASSERT(session->lttng_live_msg_iter); | |
175 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
4164020e | 176 | |
0f5c5d5c SM |
177 | lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
178 | lttng_live_trace *trace = | |
179 | lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); | |
4164020e | 180 | if (!trace) { |
0f5c5d5c | 181 | BT_CPPLOGE_APPEND_CAUSE_SPEC(session->logger, "Failed to borrow CTF trace."); |
4164020e SM |
182 | goto error; |
183 | } | |
184 | ||
0f5c5d5c | 185 | stream_iter = new lttng_live_stream_iterator {session->logger}; |
4164020e SM |
186 | stream_iter->trace = trace; |
187 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
188 | stream_iter->viewer_stream_id = stream_id; | |
189 | ||
190 | stream_iter->ctf_stream_class_id.is_set = false; | |
191 | stream_iter->ctf_stream_class_id.value = UINT64_MAX; | |
192 | ||
193 | stream_iter->last_inactivity_ts.is_set = false; | |
194 | stream_iter->last_inactivity_ts.value = 0; | |
195 | ||
196 | if (trace->trace) { | |
197 | struct ctf_trace_class *ctf_tc = | |
1fa280c9 | 198 | ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
4164020e | 199 | BT_ASSERT(!stream_iter->msg_iter); |
2d5d8c7b SM |
200 | stream_iter->msg_iter = |
201 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, | |
202 | self_msg_iter, stream_iter->logger); | |
4164020e | 203 | if (!stream_iter->msg_iter) { |
0f5c5d5c SM |
204 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
205 | "Failed to create CTF message iterator"); | |
4164020e SM |
206 | goto error; |
207 | } | |
208 | } | |
209 | stream_iter->buf = g_new0(uint8_t, lttng_live->max_query_size); | |
210 | if (!stream_iter->buf) { | |
0f5c5d5c SM |
211 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
212 | "Failed to allocate live stream iterator buffer"); | |
4164020e SM |
213 | goto error; |
214 | } | |
215 | ||
216 | stream_iter->buflen = lttng_live->max_query_size; | |
217 | stream_iter->name = g_string_new(NULL); | |
218 | if (!stream_iter->name) { | |
0f5c5d5c SM |
219 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
220 | "Failed to allocate live stream iterator name buffer"); | |
4164020e SM |
221 | goto error; |
222 | } | |
223 | ||
224 | g_string_printf(stream_iter->name, STREAM_NAME_PREFIX "%" PRIu64, | |
225 | stream_iter->viewer_stream_id); | |
226 | g_ptr_array_add(trace->stream_iterators, stream_iter); | |
227 | ||
228 | /* Track the number of active stream iterator. */ | |
229 | session->lttng_live_msg_iter->active_stream_iter++; | |
230 | ||
231 | goto end; | |
7cdc2bab | 232 | error: |
4164020e SM |
233 | lttng_live_stream_iterator_destroy(stream_iter); |
234 | stream_iter = NULL; | |
7cdc2bab | 235 | end: |
4164020e | 236 | return stream_iter; |
7cdc2bab MD |
237 | } |
238 | ||
4164020e | 239 | void lttng_live_stream_iterator_destroy(struct lttng_live_stream_iterator *stream_iter) |
7cdc2bab | 240 | { |
4164020e SM |
241 | if (!stream_iter) { |
242 | return; | |
243 | } | |
7cdc2bab | 244 | |
4164020e SM |
245 | g_free(stream_iter->buf); |
246 | if (stream_iter->name) { | |
247 | g_string_free(stream_iter->name, TRUE); | |
248 | } | |
14f28187 | 249 | |
4164020e | 250 | bt_message_put_ref(stream_iter->current_msg); |
14f28187 | 251 | |
4164020e SM |
252 | /* Track the number of active stream iterator. */ |
253 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
14f28187 | 254 | |
afb0f12b | 255 | delete stream_iter; |
7cdc2bab | 256 | } |