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f3bc2010 JG |
1 | #ifndef BABELTRACE_PLUGIN_CTF_LTTNG_LIVE_INTERNAL_H |
2 | #define BABELTRACE_PLUGIN_CTF_LTTNG_LIVE_INTERNAL_H | |
3 | ||
4 | /* | |
5 | * BabelTrace - LTTng-live client Component | |
6 | * | |
7 | * Copyright 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
7cdc2bab | 8 | * Copyright 2016 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
f3bc2010 JG |
9 | * |
10 | * Author: Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
11 | * | |
12 | * Permission is hereby granted, free of charge, to any person obtaining a copy | |
13 | * of this software and associated documentation files (the "Software"), to deal | |
14 | * in the Software without restriction, including without limitation the rights | |
15 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
16 | * copies of the Software, and to permit persons to whom the Software is | |
17 | * furnished to do so, subject to the following conditions: | |
18 | * | |
19 | * The above copyright notice and this permission notice shall be included in | |
20 | * all copies or substantial portions of the Software. | |
21 | * | |
22 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
23 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
24 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
25 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
26 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
27 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE | |
28 | * SOFTWARE. | |
29 | */ | |
30 | ||
7cdc2bab MD |
31 | #include <stdbool.h> |
32 | ||
f3bc2010 | 33 | #include <babeltrace/babeltrace-internal.h> |
b2e0c907 | 34 | #include <babeltrace/graph/component.h> |
7cdc2bab MD |
35 | #include <babeltrace/graph/notification-iterator.h> |
36 | #include <babeltrace/graph/clock-class-priority-map.h> | |
37 | #include "viewer-connection.h" | |
38 | ||
39 | //TODO: this should not be used by plugins. Should copy code into plugin | |
40 | //instead. | |
41 | #include "babeltrace/object-internal.h" | |
42 | #include "babeltrace/list-internal.h" | |
43 | #include "../common/metadata/decoder.h" | |
44 | ||
45 | #define STREAM_NAME_PREFIX "stream-" | |
46 | /* Account for u64 max string length. */ | |
47 | #define U64_STR_MAX_LEN 20 | |
48 | #define STREAM_NAME_MAX_LEN (sizeof(STREAM_NAME_PREFIX) + U64_STR_MAX_LEN) | |
49 | ||
50 | extern bool lttng_live_debug; | |
51 | ||
52 | struct lttng_live_component; | |
53 | struct lttng_live_session; | |
54 | ||
55 | enum lttng_live_stream_state { | |
56 | LTTNG_LIVE_STREAM_ACTIVE_NO_DATA, | |
57 | LTTNG_LIVE_STREAM_QUIESCENT_NO_DATA, | |
58 | LTTNG_LIVE_STREAM_QUIESCENT, | |
59 | LTTNG_LIVE_STREAM_ACTIVE_DATA, | |
60 | LTTNG_LIVE_STREAM_EOF, | |
61 | }; | |
62 | ||
63 | enum live_stream_type { | |
64 | LIVE_STREAM_TYPE_NO_STREAM, | |
65 | LIVE_STREAM_TYPE_STREAM, | |
66 | }; | |
67 | ||
68 | struct lttng_live_stream_iterator_generic { | |
69 | enum live_stream_type type; | |
70 | }; | |
71 | ||
72 | /* Iterator over a live stream. */ | |
73 | struct lttng_live_stream_iterator { | |
74 | struct lttng_live_stream_iterator_generic p; | |
75 | ||
76 | struct bt_ctf_stream *stream; | |
77 | struct lttng_live_trace *trace; | |
78 | struct bt_private_port *port; | |
79 | ||
80 | /* Node of stream list within the trace. */ | |
81 | struct bt_list_head node; | |
82 | ||
83 | /* | |
84 | * Since only a single iterator per viewer connection, we have | |
85 | * only a single notification iterator per stream. | |
86 | */ | |
87 | struct bt_ctf_notif_iter *notif_iter; | |
88 | ||
89 | uint64_t viewer_stream_id; | |
90 | ||
91 | uint64_t ctf_stream_class_id; | |
92 | uint64_t base_offset; /* base offset in current index. */ | |
93 | uint64_t len; /* len to read in current index. */ | |
94 | uint64_t offset; /* offset in current index. */ | |
95 | ||
96 | int64_t last_returned_inactivity_timestamp; | |
97 | int64_t current_inactivity_timestamp; | |
98 | ||
99 | enum lttng_live_stream_state state; | |
100 | ||
101 | uint64_t current_packet_end_timestamp; | |
102 | struct bt_notification *packet_end_notif_queue; | |
103 | ||
104 | uint8_t *buf; | |
105 | size_t buflen; | |
106 | ||
107 | char name[STREAM_NAME_MAX_LEN]; | |
108 | }; | |
109 | ||
110 | struct lttng_live_no_stream_iterator { | |
111 | struct lttng_live_stream_iterator_generic p; | |
112 | ||
113 | struct lttng_live_component *lttng_live; | |
114 | struct bt_private_port *port; | |
115 | }; | |
116 | ||
117 | struct lttng_live_component_options { | |
118 | bool opt_dummy : 1; | |
119 | }; | |
120 | ||
121 | struct lttng_live_metadata { | |
122 | struct lttng_live_trace *trace; | |
123 | uint64_t stream_id; | |
124 | uint8_t uuid[16]; | |
125 | bool is_uuid_set; | |
126 | int bo; | |
127 | char *text; | |
128 | ||
129 | struct ctf_metadata_decoder *decoder; | |
130 | ||
131 | bool closed; | |
132 | }; | |
133 | ||
134 | struct lttng_live_trace { | |
135 | struct bt_object obj; | |
136 | ||
137 | /* Node of trace list within the session. */ | |
138 | struct bt_list_head node; | |
139 | ||
140 | /* Back reference to session. */ | |
141 | struct lttng_live_session *session; | |
142 | ||
143 | uint64_t id; /* ctf trace ID within the session. */ | |
144 | ||
145 | struct bt_ctf_trace *trace; | |
146 | ||
147 | struct lttng_live_metadata *metadata; | |
148 | struct bt_clock_class_priority_map *cc_prio_map; | |
149 | ||
150 | /* List of struct lttng_live_stream_iterator */ | |
151 | struct bt_list_head streams; | |
152 | ||
153 | bool new_metadata_needed; | |
154 | }; | |
155 | ||
156 | struct lttng_live_session { | |
157 | /* Node of session list within the component. */ | |
158 | struct bt_list_head node; | |
159 | ||
160 | struct lttng_live_component *lttng_live; | |
161 | ||
162 | uint64_t id; | |
163 | ||
164 | /* List of struct lttng_live_trace */ | |
165 | struct bt_list_head traces; | |
166 | ||
167 | bool attached; | |
168 | bool new_streams_needed; | |
169 | bool lazy_stream_notif_init; | |
170 | bool closed; | |
171 | }; | |
172 | ||
173 | /* | |
174 | * A component instance is an iterator on a single session. | |
175 | */ | |
176 | struct lttng_live_component { | |
177 | struct bt_object obj; | |
178 | struct bt_private_component *private_component; /* weak */ | |
179 | struct bt_live_viewer_connection *viewer_connection; | |
180 | ||
181 | /* List of struct lttng_live_session */ | |
182 | struct bt_list_head sessions; | |
183 | ||
184 | GString *url; | |
185 | FILE *error_fp; | |
186 | size_t max_query_size; | |
187 | struct lttng_live_component_options options; | |
188 | ||
189 | struct bt_private_port *no_stream_port; | |
190 | struct lttng_live_no_stream_iterator *no_stream_iter; | |
191 | }; | |
192 | ||
193 | enum bt_ctf_lttng_live_iterator_status { | |
194 | /** Iterator state has progressed. Continue iteration immediately. */ | |
195 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_CONTINUE = 3, | |
196 | /** No notification available for now. Try again later. */ | |
197 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_AGAIN = 2, | |
198 | /** No more CTF_LTTNG_LIVEs to be delivered. */ | |
199 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_END = 1, | |
200 | /** No error, okay. */ | |
201 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_OK = 0, | |
202 | /** Invalid arguments. */ | |
203 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_INVAL = -1, | |
204 | /** General error. */ | |
205 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_ERROR = -2, | |
206 | /** Out of memory. */ | |
207 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_NOMEM = -3, | |
208 | /** Unsupported iterator feature. */ | |
209 | BT_CTF_LTTNG_LIVE_ITERATOR_STATUS_UNSUPPORTED = -4, | |
210 | }; | |
f3bc2010 | 211 | |
f3bc2010 | 212 | BT_HIDDEN |
7cdc2bab | 213 | enum bt_component_status lttng_live_component_init(struct bt_private_component *source, |
6358c163 | 214 | struct bt_value *params, void *init_method_data); |
f3bc2010 | 215 | |
7cdc2bab MD |
216 | struct bt_value *lttng_live_query(struct bt_component_class *comp_class, |
217 | const char *object, struct bt_value *params); | |
218 | ||
219 | void lttng_live_component_finalize(struct bt_private_component *component); | |
220 | ||
d3eb6e8f | 221 | BT_HIDDEN |
41a2b7ae | 222 | struct bt_notification_iterator_next_return lttng_live_iterator_next( |
890882ef | 223 | struct bt_private_notification_iterator *iterator); |
d3eb6e8f | 224 | |
7cdc2bab MD |
225 | |
226 | enum bt_notification_iterator_status lttng_live_iterator_init( | |
227 | struct bt_private_notification_iterator *it, | |
228 | struct bt_private_port *port); | |
229 | ||
230 | void lttng_live_iterator_finalize(struct bt_private_notification_iterator *it); | |
231 | ||
232 | int lttng_live_create_viewer_session(struct lttng_live_component *lttng_live); | |
233 | int lttng_live_attach_session(struct lttng_live_session *session); | |
234 | int lttng_live_detach_session(struct lttng_live_session *session); | |
235 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_new_streams( | |
236 | struct lttng_live_session *session); | |
237 | ||
238 | int lttng_live_add_session(struct lttng_live_component *lttng_live, uint64_t session_id); | |
239 | ||
240 | ssize_t lttng_live_get_one_metadata_packet(struct lttng_live_trace *trace, | |
241 | FILE *fp); | |
242 | enum bt_ctf_lttng_live_iterator_status lttng_live_get_next_index( | |
243 | struct lttng_live_component *lttng_live, | |
244 | struct lttng_live_stream_iterator *stream, | |
245 | struct packet_index *index); | |
246 | enum bt_ctf_notif_iter_medium_status lttng_live_get_stream_bytes( | |
247 | struct lttng_live_component *lttng_live, | |
248 | struct lttng_live_stream_iterator *stream, uint8_t *buf, uint64_t offset, | |
249 | uint64_t req_len, uint64_t *recv_len); | |
250 | ||
251 | int lttng_live_add_port(struct lttng_live_component *lttng_live, | |
252 | struct lttng_live_stream_iterator *stream_iter); | |
253 | int lttng_live_remove_port(struct lttng_live_component *lttng_live, | |
254 | struct bt_private_port *port); | |
255 | ||
256 | struct lttng_live_trace *lttng_live_ref_trace( | |
257 | struct lttng_live_session *session, uint64_t trace_id); | |
258 | void lttng_live_unref_trace(struct lttng_live_trace *trace); | |
259 | void lttng_live_need_new_streams(struct lttng_live_component *lttng_live); | |
260 | ||
f3bc2010 | 261 | #endif /* BABELTRACE_PLUGIN_CTF_LTTNG_LIVE_INTERNAL_H */ |