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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 | ||
e28ca558 SM |
10 | #include <sstream> |
11 | ||
c802cacb | 12 | #include <glib.h> |
7cdc2bab | 13 | #include <stdio.h> |
5656cea5 PP |
14 | #include <stdlib.h> |
15 | ||
16 | #include <babeltrace2/babeltrace.h> | |
17 | ||
578e048b | 18 | #include "common/assert.h" |
83ad336c | 19 | #include "compat/mman.h" /* IWYU pragma: keep */ |
6eeff3ca | 20 | #include "cpp-common/bt2s/make-unique.hpp" |
0f5c5d5c | 21 | #include "cpp-common/vendor/fmt/format.h" |
c802cacb | 22 | |
5656cea5 | 23 | #include "../common/src/msg-iter/msg-iter.hpp" |
087cd0f5 | 24 | #include "data-stream.hpp" |
7cdc2bab | 25 | |
4164020e | 26 | #define STREAM_NAME_PREFIX "stream-" |
14f28187 | 27 | |
4164020e SM |
28 | static enum ctf_msg_iter_medium_status medop_request_bytes(size_t request_sz, uint8_t **buffer_addr, |
29 | size_t *buffer_sz, void *data) | |
7cdc2bab | 30 | { |
4164020e SM |
31 | lttng_live_stream_iterator *stream = (lttng_live_stream_iterator *) data; |
32 | struct lttng_live_trace *trace = stream->trace; | |
33 | struct lttng_live_session *session = trace->session; | |
34 | struct lttng_live_msg_iter *live_msg_iter = session->lttng_live_msg_iter; | |
35 | uint64_t recv_len = 0; | |
36 | uint64_t len_left; | |
37 | uint64_t read_len; | |
38 | ||
39 | BT_ASSERT(request_sz); | |
40 | ||
41 | if (stream->has_stream_hung_up) { | |
60323499 | 42 | return CTF_MSG_ITER_MEDIUM_STATUS_EOF; |
4164020e SM |
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); | |
60323499 | 48 | return CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; |
4164020e SM |
49 | } |
50 | ||
afbf59c4 | 51 | read_len = MIN(request_sz, stream->buf.size()); |
4164020e | 52 | read_len = MIN(read_len, len_left); |
60323499 SM |
53 | |
54 | const auto status = lttng_live_get_stream_bytes(live_msg_iter, stream, stream->buf.data(), | |
55 | stream->offset, read_len, &recv_len); | |
56 | ||
57 | if (status != CTF_MSG_ITER_MEDIUM_STATUS_OK) { | |
58 | return status; | |
59 | } | |
60 | ||
afbf59c4 | 61 | *buffer_addr = stream->buf.data(); |
4164020e SM |
62 | *buffer_sz = recv_len; |
63 | stream->offset += recv_len; | |
60323499 SM |
64 | |
65 | return CTF_MSG_ITER_MEDIUM_STATUS_OK; | |
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; |
4164020e SM |
71 | |
72 | if (!lttng_live_stream->stream) { | |
73 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); | |
74 | ||
0f5c5d5c SM |
75 | BT_CPPLOGI_SPEC(lttng_live_stream->logger, |
76 | "Creating stream {} (ID: {}) out of stream class {}", | |
e28ca558 | 77 | lttng_live_stream->name, stream_id, stream_class_id); |
4164020e | 78 | |
0b68f2bc SM |
79 | bt_stream *stream; |
80 | ||
4164020e SM |
81 | if (stream_id < 0) { |
82 | /* | |
83 | * No stream instance ID in the stream. It's possible | |
84 | * to encounter this situation with older version of | |
85 | * LTTng. In these cases, use the viewer_stream_id that | |
86 | * is unique for a live viewer session. | |
87 | */ | |
0b68f2bc | 88 | stream = |
7916e7eb SM |
89 | bt_stream_create_with_id(stream_class, lttng_live_stream->trace->trace->libObjPtr(), |
90 | lttng_live_stream->viewer_stream_id); | |
4164020e | 91 | } else { |
0b68f2bc | 92 | stream = bt_stream_create_with_id( |
7916e7eb | 93 | stream_class, lttng_live_stream->trace->trace->libObjPtr(), (uint64_t) stream_id); |
4164020e SM |
94 | } |
95 | ||
0b68f2bc | 96 | if (!stream) { |
0f5c5d5c SM |
97 | BT_CPPLOGE_APPEND_CAUSE_SPEC( |
98 | lttng_live_stream->logger, | |
99 | "Cannot create stream {} (stream class ID {}, stream ID {})", | |
e28ca558 | 100 | lttng_live_stream->name, stream_class_id, stream_id); |
0b68f2bc | 101 | return nullptr; |
4164020e SM |
102 | } |
103 | ||
0b68f2bc | 104 | lttng_live_stream->stream = bt2::Stream::Shared::createWithoutRef(stream); |
e28ca558 SM |
105 | |
106 | lttng_live_stream->stream->name(lttng_live_stream->name); | |
4164020e | 107 | } |
7cdc2bab | 108 | |
0b68f2bc | 109 | return lttng_live_stream->stream->libObjPtr(); |
7cdc2bab MD |
110 | } |
111 | ||
18a1979b | 112 | static struct ctf_msg_iter_medium_ops medops = { |
4164020e SM |
113 | medop_request_bytes, |
114 | nullptr, | |
115 | nullptr, | |
116 | medop_borrow_stream, | |
7cdc2bab MD |
117 | }; |
118 | ||
4164020e SM |
119 | enum lttng_live_iterator_status lttng_live_lazy_msg_init(struct lttng_live_session *session, |
120 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 121 | { |
4164020e | 122 | struct lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
4164020e SM |
123 | |
124 | if (!session->lazy_stream_msg_init) { | |
125 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
126 | } | |
127 | ||
0f5c5d5c SM |
128 | BT_CPPLOGD_SPEC(session->logger, |
129 | "Lazily initializing self message iterator for live session: " | |
130 | "session-id={}, self-msg-iter-addr={}", | |
131 | session->id, fmt::ptr(self_msg_iter)); | |
4164020e | 132 | |
6dcda123 | 133 | for (lttng_live_trace::UP& trace : session->traces) { |
db00b877 | 134 | for (lttng_live_stream_iterator::UP& stream_iter : trace->stream_iterators) { |
4164020e | 135 | struct ctf_trace_class *ctf_tc; |
4164020e SM |
136 | |
137 | if (stream_iter->msg_iter) { | |
138 | continue; | |
139 | } | |
db00b877 | 140 | |
1fa280c9 | 141 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
0f5c5d5c SM |
142 | BT_CPPLOGD_SPEC(stream_iter->logger, |
143 | "Creating CTF message iterator: session-id={}, ctf-tc-addr={}, " | |
144 | "stream-iter-name={}, self-msg-iter-addr={}", | |
e28ca558 | 145 | session->id, fmt::ptr(ctf_tc), stream_iter->name, |
0f5c5d5c | 146 | fmt::ptr(self_msg_iter)); |
4164020e | 147 | stream_iter->msg_iter = |
db00b877 | 148 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter.get(), |
2d5d8c7b | 149 | self_msg_iter, stream_iter->logger); |
4164020e | 150 | if (!stream_iter->msg_iter) { |
0f5c5d5c SM |
151 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
152 | "Failed to create CTF message iterator"); | |
60323499 | 153 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
4164020e SM |
154 | } |
155 | } | |
156 | } | |
157 | ||
158 | session->lazy_stream_msg_init = false; | |
159 | ||
160 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
161 | } |
162 | ||
4164020e SM |
163 | struct lttng_live_stream_iterator * |
164 | lttng_live_stream_iterator_create(struct lttng_live_session *session, uint64_t ctf_trace_id, | |
165 | uint64_t stream_id, bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 166 | { |
e28ca558 | 167 | std::stringstream nameSs; |
4164020e SM |
168 | |
169 | BT_ASSERT(session); | |
170 | BT_ASSERT(session->lttng_live_msg_iter); | |
171 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
4164020e | 172 | |
0f5c5d5c SM |
173 | lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
174 | lttng_live_trace *trace = | |
175 | lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); | |
4164020e | 176 | if (!trace) { |
0f5c5d5c | 177 | BT_CPPLOGE_APPEND_CAUSE_SPEC(session->logger, "Failed to borrow CTF trace."); |
6eeff3ca | 178 | return nullptr; |
4164020e SM |
179 | } |
180 | ||
6eeff3ca SM |
181 | auto stream_iter = bt2s::make_unique<lttng_live_stream_iterator>(session->logger); |
182 | ||
4164020e SM |
183 | stream_iter->trace = trace; |
184 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
185 | stream_iter->viewer_stream_id = stream_id; | |
186 | ||
187 | stream_iter->ctf_stream_class_id.is_set = false; | |
188 | stream_iter->ctf_stream_class_id.value = UINT64_MAX; | |
189 | ||
190 | stream_iter->last_inactivity_ts.is_set = false; | |
191 | stream_iter->last_inactivity_ts.value = 0; | |
192 | ||
193 | if (trace->trace) { | |
194 | struct ctf_trace_class *ctf_tc = | |
1fa280c9 | 195 | ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
4164020e | 196 | BT_ASSERT(!stream_iter->msg_iter); |
2d5d8c7b | 197 | stream_iter->msg_iter = |
6eeff3ca | 198 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter.get(), |
2d5d8c7b | 199 | self_msg_iter, stream_iter->logger); |
4164020e | 200 | if (!stream_iter->msg_iter) { |
0f5c5d5c SM |
201 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
202 | "Failed to create CTF message iterator"); | |
6eeff3ca | 203 | return nullptr; |
4164020e SM |
204 | } |
205 | } | |
afbf59c4 | 206 | stream_iter->buf.resize(lttng_live->max_query_size); |
4164020e | 207 | |
e28ca558 SM |
208 | nameSs << STREAM_NAME_PREFIX << stream_iter->viewer_stream_id; |
209 | stream_iter->name = nameSs.str(); | |
6eeff3ca SM |
210 | |
211 | const auto ret = stream_iter.get(); | |
db00b877 | 212 | trace->stream_iterators.emplace_back(std::move(stream_iter)); |
4164020e SM |
213 | |
214 | /* Track the number of active stream iterator. */ | |
215 | session->lttng_live_msg_iter->active_stream_iter++; | |
216 | ||
6eeff3ca | 217 | return ret; |
7cdc2bab MD |
218 | } |
219 | ||
ce4ee876 | 220 | lttng_live_stream_iterator::~lttng_live_stream_iterator() |
7cdc2bab | 221 | { |
4164020e | 222 | /* Track the number of active stream iterator. */ |
ce4ee876 SM |
223 | this->trace->session->lttng_live_msg_iter->active_stream_iter--; |
224 | } |