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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 | ||
27a14e13 SM |
10 | #define BT_CLOG_CFG logCfg |
11 | #define BT_LOG_TAG "PLUGIN/SRC.CTF.LTTNG-LIVE/DS" | |
020bc26f | 12 | |
3c22a242 | 13 | #include <inttypes.h> |
7cdc2bab | 14 | #include <stdio.h> |
7cdc2bab | 15 | #include <stdlib.h> |
dff1c223 | 16 | #include <sstream> |
3c22a242 | 17 | |
7cdc2bab | 18 | #include <glib.h> |
3c22a242 | 19 | |
3fadfbc0 | 20 | #include <babeltrace2/babeltrace.h> |
3c22a242 | 21 | |
27a14e13 | 22 | #include "cpp-common/cfg-logging.hpp" |
364f5320 | 23 | #include "../common/src/msg-iter/msg-iter.hpp" |
578e048b | 24 | #include "common/assert.h" |
3c22a242 | 25 | #include "compat/mman.h" |
087cd0f5 | 26 | #include "data-stream.hpp" |
27a14e13 | 27 | #include "cpp-common/cfg-logging-error-reporting.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 | ||
dba2a2af | 57 | read_len = MIN(request_sz, stream->buf.size()); |
4164020e | 58 | read_len = MIN(read_len, len_left); |
dba2a2af | 59 | status = lttng_live_get_stream_bytes(live_msg_iter, stream, stream->buf.data(), stream->offset, |
4164020e | 60 | read_len, &recv_len); |
dba2a2af | 61 | *buffer_addr = stream->buf.data(); |
4164020e SM |
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 | 70 | lttng_live_stream_iterator *lttng_live_stream = (lttng_live_stream_iterator *) data; |
27a14e13 | 71 | const bt2_common::LogCfg& logCfg = lttng_live_stream->logCfg; |
4164020e SM |
72 | |
73 | if (!lttng_live_stream->stream) { | |
74 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); | |
75 | ||
27a14e13 SM |
76 | BT_CLOGI("Creating stream %s (ID: %" PRIu64 ") out of stream " |
77 | "class %" PRId64, | |
dff1c223 | 78 | lttng_live_stream->name.c_str(), stream_id, stream_class_id); |
4164020e | 79 | |
5f16c381 SM |
80 | bt_stream *stream; |
81 | ||
4164020e SM |
82 | if (stream_id < 0) { |
83 | /* | |
84 | * No stream instance ID in the stream. It's possible | |
85 | * to encounter this situation with older version of | |
86 | * LTTng. In these cases, use the viewer_stream_id that | |
87 | * is unique for a live viewer session. | |
88 | */ | |
5f16c381 SM |
89 | stream = bt_stream_create_with_id(stream_class, |
90 | (*lttng_live_stream->trace->trace)->libObjPtr(), | |
91 | lttng_live_stream->viewer_stream_id); | |
4164020e | 92 | } else { |
5f16c381 SM |
93 | stream = bt_stream_create_with_id(stream_class, |
94 | (*lttng_live_stream->trace->trace)->libObjPtr(), | |
95 | (uint64_t) stream_id); | |
4164020e SM |
96 | } |
97 | ||
5f16c381 | 98 | if (!stream) { |
27a14e13 SM |
99 | BT_CLOGE_APPEND_CAUSE("Cannot create stream %s (stream class ID " |
100 | "%" PRId64 ", stream ID %" PRIu64 ")", | |
dff1c223 | 101 | lttng_live_stream->name.c_str(), stream_class_id, stream_id); |
5f16c381 | 102 | return nullptr; |
4164020e SM |
103 | } |
104 | ||
5f16c381 SM |
105 | lttng_live_stream->stream = bt2::Stream::Shared::createWithoutRef(stream); |
106 | ||
dff1c223 | 107 | (*lttng_live_stream->stream)->name(lttng_live_stream->name); |
4164020e | 108 | } |
7cdc2bab | 109 | |
5f16c381 | 110 | return (*lttng_live_stream->stream)->libObjPtr(); |
7cdc2bab MD |
111 | } |
112 | ||
18a1979b | 113 | static struct ctf_msg_iter_medium_ops medops = { |
4164020e SM |
114 | medop_request_bytes, |
115 | nullptr, | |
116 | nullptr, | |
117 | medop_borrow_stream, | |
7cdc2bab MD |
118 | }; |
119 | ||
120 | BT_HIDDEN | |
4164020e SM |
121 | enum lttng_live_iterator_status lttng_live_lazy_msg_init(struct lttng_live_session *session, |
122 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 123 | { |
4164020e SM |
124 | struct lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
125 | uint64_t trace_idx, stream_iter_idx; | |
27a14e13 | 126 | const bt2_common::LogCfg& logCfg = session->logCfg; |
4164020e SM |
127 | |
128 | if (!session->lazy_stream_msg_init) { | |
129 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
130 | } | |
131 | ||
27a14e13 SM |
132 | BT_CLOGD("Lazily initializing self message iterator for live session: " |
133 | "session-id=%" PRIu64 ", self-msg-iter-addr=%p", | |
134 | session->id, self_msg_iter); | |
4164020e SM |
135 | |
136 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { | |
137 | struct lttng_live_trace *trace = | |
138 | (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx); | |
139 | ||
140 | for (stream_iter_idx = 0; stream_iter_idx < trace->stream_iterators->len; | |
141 | stream_iter_idx++) { | |
142 | struct ctf_trace_class *ctf_tc; | |
143 | struct lttng_live_stream_iterator *stream_iter = | |
144 | (lttng_live_stream_iterator *) g_ptr_array_index(trace->stream_iterators, | |
145 | stream_iter_idx); | |
146 | ||
147 | if (stream_iter->msg_iter) { | |
148 | continue; | |
149 | } | |
65381cf3 | 150 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
27a14e13 SM |
151 | BT_CLOGD("Creating CTF message iterator: " |
152 | "session-id=%" PRIu64 ", ctf-tc-addr=%p, " | |
153 | "stream-iter-name=%s, self-msg-iter-addr=%p", | |
dff1c223 | 154 | session->id, ctf_tc, stream_iter->name.c_str(), self_msg_iter); |
27a14e13 | 155 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, |
8469ed41 | 156 | stream_iter, self_msg_iter, logCfg); |
4164020e | 157 | if (!stream_iter->msg_iter) { |
27a14e13 | 158 | BT_CLOGE_APPEND_CAUSE("Failed to create CTF message iterator"); |
4164020e SM |
159 | goto error; |
160 | } | |
161 | } | |
162 | } | |
163 | ||
164 | session->lazy_stream_msg_init = false; | |
165 | ||
166 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
167 | |
168 | error: | |
4164020e | 169 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
170 | } |
171 | ||
172 | BT_HIDDEN | |
4164020e SM |
173 | struct lttng_live_stream_iterator * |
174 | lttng_live_stream_iterator_create(struct lttng_live_session *session, uint64_t ctf_trace_id, | |
175 | uint64_t stream_id, bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 176 | { |
4164020e SM |
177 | struct lttng_live_component *lttng_live; |
178 | struct lttng_live_trace *trace; | |
dff1c223 | 179 | std::stringstream nameSs; |
4164020e SM |
180 | |
181 | BT_ASSERT(session); | |
182 | BT_ASSERT(session->lttng_live_msg_iter); | |
183 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
27a14e13 SM |
184 | |
185 | const bt2_common::LogCfg& logCfg = session->logCfg; | |
4164020e SM |
186 | |
187 | lttng_live = session->lttng_live_msg_iter->lttng_live_comp; | |
188 | ||
27a14e13 | 189 | lttng_live_stream_iterator *stream_iter = new lttng_live_stream_iterator {logCfg}; |
4164020e SM |
190 | trace = lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); |
191 | if (!trace) { | |
27a14e13 | 192 | BT_CLOGE_APPEND_CAUSE("Failed to borrow CTF trace."); |
4164020e SM |
193 | goto error; |
194 | } | |
195 | ||
196 | stream_iter->trace = trace; | |
197 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
198 | stream_iter->viewer_stream_id = stream_id; | |
199 | ||
200 | stream_iter->ctf_stream_class_id.is_set = false; | |
201 | stream_iter->ctf_stream_class_id.value = UINT64_MAX; | |
202 | ||
203 | stream_iter->last_inactivity_ts.is_set = false; | |
204 | stream_iter->last_inactivity_ts.value = 0; | |
205 | ||
206 | if (trace->trace) { | |
207 | struct ctf_trace_class *ctf_tc = | |
65381cf3 | 208 | ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
4164020e | 209 | BT_ASSERT(!stream_iter->msg_iter); |
27a14e13 | 210 | stream_iter->msg_iter = ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, |
8469ed41 | 211 | stream_iter, self_msg_iter, logCfg); |
4164020e | 212 | if (!stream_iter->msg_iter) { |
27a14e13 | 213 | BT_CLOGE_APPEND_CAUSE("Failed to create CTF message iterator"); |
4164020e SM |
214 | goto error; |
215 | } | |
216 | } | |
dba2a2af | 217 | stream_iter->buf.resize(lttng_live->max_query_size); |
4164020e | 218 | |
dff1c223 SM |
219 | nameSs << STREAM_NAME_PREFIX << stream_iter->viewer_stream_id; |
220 | stream_iter->name = nameSs.str(); | |
4164020e SM |
221 | g_ptr_array_add(trace->stream_iterators, stream_iter); |
222 | ||
223 | /* Track the number of active stream iterator. */ | |
224 | session->lttng_live_msg_iter->active_stream_iter++; | |
225 | ||
226 | goto end; | |
7cdc2bab | 227 | error: |
4164020e SM |
228 | lttng_live_stream_iterator_destroy(stream_iter); |
229 | stream_iter = NULL; | |
7cdc2bab | 230 | end: |
4164020e | 231 | return stream_iter; |
7cdc2bab MD |
232 | } |
233 | ||
234 | BT_HIDDEN | |
4164020e | 235 | void lttng_live_stream_iterator_destroy(struct lttng_live_stream_iterator *stream_iter) |
7cdc2bab | 236 | { |
4164020e SM |
237 | if (!stream_iter) { |
238 | return; | |
239 | } | |
7cdc2bab | 240 | |
4164020e SM |
241 | /* Track the number of active stream iterator. */ |
242 | stream_iter->trace->session->lttng_live_msg_iter->active_stream_iter--; | |
14f28187 | 243 | |
6269f212 | 244 | delete stream_iter; |
7cdc2bab | 245 | } |