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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 2010-2011 EfficiOS Inc. and Linux Foundation | |
7cdc2bab MD |
7 | */ |
8 | ||
578e048b | 9 | #include "compat/memstream.h" |
15fcc425 | 10 | #include "cpp-common/bt2c/libc-up.hpp" |
e66be7c3 | 11 | #include "cpp-common/bt2s/make-unique.hpp" |
7cdc2bab | 12 | |
5656cea5 PP |
13 | #include "../common/src/metadata/tsdl/ctf-meta-configure-ir-trace.hpp" |
14 | #include "../common/src/metadata/tsdl/decoder.hpp" | |
15 | #include "lttng-live.hpp" | |
c802cacb | 16 | #include "metadata.hpp" |
7cdc2bab | 17 | |
4164020e | 18 | #define TSDL_MAGIC 0x75d11d57 |
7cdc2bab | 19 | |
4164020e SM |
20 | struct packet_header |
21 | { | |
22 | uint32_t magic; | |
23 | uint8_t uuid[16]; | |
24 | uint32_t checksum; | |
25 | uint32_t content_size; | |
26 | uint32_t packet_size; | |
27 | uint8_t compression_scheme; | |
28 | uint8_t encryption_scheme; | |
29 | uint8_t checksum_scheme; | |
30 | uint8_t major; | |
31 | uint8_t minor; | |
32 | } __attribute__((__packed__)); | |
14f28187 | 33 | |
4164020e | 34 | static bool stream_classes_all_have_default_clock_class(bt_trace_class *tc, |
0f5c5d5c | 35 | const bt2c::Logger& logger) |
7cdc2bab | 36 | { |
4164020e SM |
37 | uint64_t i, sc_count; |
38 | const bt_clock_class *cc = NULL; | |
39 | const bt_stream_class *sc; | |
40 | bool ret = true; | |
41 | ||
42 | sc_count = bt_trace_class_get_stream_class_count(tc); | |
43 | for (i = 0; i < sc_count; i++) { | |
44 | sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i); | |
45 | ||
46 | BT_ASSERT(sc); | |
47 | ||
48 | cc = bt_stream_class_borrow_default_clock_class_const(sc); | |
49 | if (!cc) { | |
50 | ret = false; | |
0f5c5d5c SM |
51 | BT_CPPLOGE_APPEND_CAUSE_SPEC(logger, |
52 | "Stream class doesn't have a default clock class: " | |
53 | "sc-id={}, sc-name=\"{}\"", | |
54 | bt_stream_class_get_id(sc), bt_stream_class_get_name(sc)); | |
4164020e SM |
55 | goto end; |
56 | } | |
57 | } | |
7cdc2bab | 58 | |
7cdc2bab | 59 | end: |
4164020e | 60 | return ret; |
14f28187 FD |
61 | } |
62 | /* | |
63 | * Iterate over the stream classes and returns the first clock class | |
64 | * encountered. This is useful to create message iterator inactivity message as | |
65 | * we don't need a particular clock class. | |
66 | */ | |
4164020e | 67 | static const bt_clock_class *borrow_any_clock_class(bt_trace_class *tc) |
14f28187 | 68 | { |
4164020e SM |
69 | uint64_t i, sc_count; |
70 | const bt_clock_class *cc = NULL; | |
71 | const bt_stream_class *sc; | |
72 | ||
73 | sc_count = bt_trace_class_get_stream_class_count(tc); | |
74 | for (i = 0; i < sc_count; i++) { | |
75 | sc = bt_trace_class_borrow_stream_class_by_index_const(tc, i); | |
76 | BT_ASSERT_DBG(sc); | |
77 | ||
78 | cc = bt_stream_class_borrow_default_clock_class_const(sc); | |
79 | if (cc) { | |
80 | goto end; | |
81 | } | |
82 | } | |
14f28187 | 83 | end: |
4164020e SM |
84 | BT_ASSERT_DBG(cc); |
85 | return cc; | |
7cdc2bab MD |
86 | } |
87 | ||
4164020e | 88 | enum lttng_live_iterator_status lttng_live_metadata_update(struct lttng_live_trace *trace) |
7cdc2bab | 89 | { |
4164020e | 90 | struct lttng_live_session *session = trace->session; |
e66be7c3 | 91 | struct lttng_live_metadata *metadata = trace->metadata.get(); |
15fcc425 | 92 | std::vector<char> metadataBuf; |
4164020e | 93 | bool keep_receiving; |
15fcc425 | 94 | bt2c::FileUP fp; |
4164020e SM |
95 | enum ctf_metadata_decoder_status decoder_status; |
96 | enum lttng_live_iterator_status status = LTTNG_LIVE_ITERATOR_STATUS_OK; | |
4164020e SM |
97 | enum lttng_live_get_one_metadata_status metadata_status; |
98 | ||
0f5c5d5c SM |
99 | BT_CPPLOGD_SPEC(metadata->logger, "Updating metadata for trace: session-id={}, trace-id={}", |
100 | session->id, trace->id); | |
4164020e SM |
101 | |
102 | /* No metadata stream yet. */ | |
103 | if (!metadata) { | |
86080481 FD |
104 | if (session->closed) { |
105 | /* | |
106 | * The session is closed AND we never received any | |
107 | * metadata this indicates that we will never receive | |
108 | * any metadata. | |
109 | */ | |
110 | status = LTTNG_LIVE_ITERATOR_STATUS_END; | |
111 | } else if (session->new_streams_needed) { | |
4164020e SM |
112 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; |
113 | } else { | |
114 | session->new_streams_needed = true; | |
115 | status = LTTNG_LIVE_ITERATOR_STATUS_CONTINUE; | |
116 | } | |
117 | goto end; | |
118 | } | |
119 | ||
120 | if (trace->metadata_stream_state != LTTNG_LIVE_METADATA_STREAM_STATE_NEEDED) { | |
121 | goto end; | |
122 | } | |
123 | ||
4164020e SM |
124 | keep_receiving = true; |
125 | /* Grab all available metadata. */ | |
126 | while (keep_receiving) { | |
4164020e SM |
127 | /* |
128 | * lttng_live_get_one_metadata_packet() asks the Relay Daemon | |
129 | * for new metadata. If new metadata is received, the function | |
130 | * writes it to the provided file handle and updates the | |
131 | * reply_len output parameter. We call this function in loop | |
132 | * until it returns _END meaning that no new metadata is | |
133 | * available. | |
134 | * We may receive a _CLOSED status if the metadata stream we | |
135 | * are requesting is no longer available on the relay. | |
136 | * If we receive an _ERROR status, it means there was a | |
137 | * networking, allocating, or some other unrecoverable error. | |
138 | */ | |
15fcc425 | 139 | metadata_status = lttng_live_get_one_metadata_packet(trace, metadataBuf); |
4164020e SM |
140 | |
141 | switch (metadata_status) { | |
142 | case LTTNG_LIVE_GET_ONE_METADATA_STATUS_OK: | |
4164020e SM |
143 | break; |
144 | case LTTNG_LIVE_GET_ONE_METADATA_STATUS_END: | |
145 | keep_receiving = false; | |
146 | break; | |
147 | case LTTNG_LIVE_GET_ONE_METADATA_STATUS_CLOSED: | |
0f5c5d5c SM |
148 | BT_CPPLOGD_SPEC( |
149 | metadata->logger, | |
150 | "Metadata stream was closed by the Relay, the trace is no longer active: " | |
151 | "trace-id={}, metadata-stream-id={}", | |
152 | trace->id, metadata->stream_id); | |
4164020e SM |
153 | /* |
154 | * The stream was closed and we received everything | |
155 | * there was to receive for this metadata stream. | |
156 | * We go on with the decoding of what we received. So | |
157 | * that data stream can be decoded. | |
158 | */ | |
159 | keep_receiving = false; | |
160 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_CLOSED; | |
161 | break; | |
162 | case LTTNG_LIVE_GET_ONE_METADATA_STATUS_ERROR: | |
0f5c5d5c SM |
163 | BT_CPPLOGE_APPEND_CAUSE_SPEC(metadata->logger, |
164 | "Error getting one trace metadata packet: trace-id={}", | |
165 | trace->id); | |
4164020e SM |
166 | goto error; |
167 | default: | |
168 | bt_common_abort(); | |
169 | } | |
170 | } | |
171 | ||
15fcc425 | 172 | if (metadataBuf.empty()) { |
4164020e SM |
173 | if (!trace->trace) { |
174 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
175 | goto end; | |
176 | } | |
177 | ||
e7401568 | 178 | /* The relay sent zero bytes of metadata. */ |
4164020e SM |
179 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED; |
180 | goto end; | |
181 | } | |
182 | ||
183 | /* | |
184 | * Open a new reading file handle on the `metadata_buf` and pass it to | |
185 | * the metadata decoder. | |
186 | */ | |
15fcc425 | 187 | fp.reset(bt_fmemopen(metadataBuf.data(), metadataBuf.size(), "rb")); |
4164020e SM |
188 | if (!fp) { |
189 | if (errno == EINTR && lttng_live_graph_is_canceled(session->lttng_live_msg_iter)) { | |
190 | session->lttng_live_msg_iter->was_interrupted = true; | |
191 | status = LTTNG_LIVE_ITERATOR_STATUS_AGAIN; | |
192 | } else { | |
0f5c5d5c SM |
193 | BT_CPPLOGE_ERRNO_APPEND_CAUSE_SPEC(metadata->logger, |
194 | "Cannot memory-open metadata buffer", "."); | |
4164020e SM |
195 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
196 | } | |
197 | goto end; | |
198 | } | |
199 | ||
200 | /* | |
201 | * The call to ctf_metadata_decoder_append_content() will append | |
202 | * new metadata to our current trace class. | |
203 | */ | |
0f5c5d5c | 204 | BT_CPPLOGD_SPEC(metadata->logger, "Appending new metadata to the ctf_trace class"); |
15fcc425 | 205 | decoder_status = ctf_metadata_decoder_append_content(metadata->decoder.get(), fp.get()); |
4164020e SM |
206 | switch (decoder_status) { |
207 | case CTF_METADATA_DECODER_STATUS_OK: | |
208 | if (!trace->trace_class) { | |
209 | struct ctf_trace_class *tc = | |
1fa280c9 | 210 | ctf_metadata_decoder_borrow_ctf_trace_class(metadata->decoder.get()); |
4164020e | 211 | |
a52f1f2e | 212 | trace->trace_class = ctf_metadata_decoder_get_ir_trace_class(metadata->decoder.get()); |
7916e7eb | 213 | trace->trace = trace->trace_class->instantiate(); |
4164020e | 214 | if (!trace->trace) { |
0f5c5d5c | 215 | BT_CPPLOGE_APPEND_CAUSE_SPEC(metadata->logger, "Failed to create bt_trace"); |
4164020e SM |
216 | goto error; |
217 | } | |
6954b97e SM |
218 | |
219 | ctf_trace_class_configure_ir_trace(tc, *trace->trace); | |
220 | ||
a52f1f2e | 221 | if (!stream_classes_all_have_default_clock_class(trace->trace_class->libObjPtr(), |
0f5c5d5c | 222 | metadata->logger)) { |
4164020e SM |
223 | /* Error logged in function. */ |
224 | goto error; | |
225 | } | |
a52f1f2e | 226 | trace->clock_class = borrow_any_clock_class(trace->trace_class->libObjPtr()); |
4164020e SM |
227 | } |
228 | ||
e7401568 | 229 | /* The metadata was updated successfully. */ |
4164020e SM |
230 | trace->metadata_stream_state = LTTNG_LIVE_METADATA_STREAM_STATE_NOT_NEEDED; |
231 | ||
232 | break; | |
233 | default: | |
234 | goto error; | |
235 | } | |
236 | ||
237 | goto end; | |
c28512ab | 238 | |
7cdc2bab | 239 | error: |
4164020e | 240 | status = LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab | 241 | end: |
4164020e | 242 | return status; |
7cdc2bab MD |
243 | } |
244 | ||
4164020e | 245 | int lttng_live_metadata_create_stream(struct lttng_live_session *session, uint64_t ctf_trace_id, |
44bd6303 | 246 | uint64_t stream_id) |
7cdc2bab | 247 | { |
4164020e SM |
248 | struct lttng_live_trace *trace; |
249 | ||
0f5c5d5c | 250 | ctf_metadata_decoder_config cfg {session->logger}; |
4164020e | 251 | cfg.self_comp = session->self_comp; |
4164020e SM |
252 | cfg.create_trace_class = true; |
253 | ||
e66be7c3 | 254 | auto metadata = bt2s::make_unique<lttng_live_metadata>(session->logger); |
4164020e SM |
255 | metadata->stream_id = stream_id; |
256 | ||
257 | metadata->decoder = ctf_metadata_decoder_create(&cfg); | |
258 | if (!metadata->decoder) { | |
0f5c5d5c | 259 | BT_CPPLOGE_APPEND_CAUSE_SPEC(session->logger, "Failed to create CTF metadata decoder"); |
e66be7c3 | 260 | return -1; |
4164020e | 261 | } |
e66be7c3 | 262 | |
4164020e SM |
263 | trace = lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); |
264 | if (!trace) { | |
0f5c5d5c | 265 | BT_CPPLOGE_APPEND_CAUSE_SPEC(session->logger, "Failed to borrow trace"); |
e66be7c3 | 266 | return -1; |
4164020e | 267 | } |
4164020e | 268 | |
e66be7c3 SM |
269 | trace->metadata = std::move(metadata); |
270 | return 0; | |
7cdc2bab | 271 | } |