Commit | Line | Data |
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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 */ |
0f5c5d5c | 20 | #include "cpp-common/vendor/fmt/format.h" |
c802cacb | 21 | |
5656cea5 | 22 | #include "../common/src/msg-iter/msg-iter.hpp" |
087cd0f5 | 23 | #include "data-stream.hpp" |
7cdc2bab | 24 | |
4164020e | 25 | #define STREAM_NAME_PREFIX "stream-" |
14f28187 | 26 | |
4164020e SM |
27 | static enum ctf_msg_iter_medium_status medop_request_bytes(size_t request_sz, uint8_t **buffer_addr, |
28 | size_t *buffer_sz, void *data) | |
7cdc2bab | 29 | { |
4164020e SM |
30 | enum ctf_msg_iter_medium_status status = CTF_MSG_ITER_MEDIUM_STATUS_OK; |
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) { | |
42 | status = CTF_MSG_ITER_MEDIUM_STATUS_EOF; | |
43 | goto end; | |
44 | } | |
45 | ||
46 | len_left = stream->base_offset + stream->len - stream->offset; | |
47 | if (!len_left) { | |
48 | lttng_live_stream_iterator_set_state(stream, LTTNG_LIVE_STREAM_ACTIVE_NO_DATA); | |
49 | status = CTF_MSG_ITER_MEDIUM_STATUS_AGAIN; | |
50 | goto end; | |
51 | } | |
52 | ||
afbf59c4 | 53 | read_len = MIN(request_sz, stream->buf.size()); |
4164020e | 54 | read_len = MIN(read_len, len_left); |
afbf59c4 | 55 | status = lttng_live_get_stream_bytes(live_msg_iter, stream, stream->buf.data(), stream->offset, |
4164020e | 56 | read_len, &recv_len); |
afbf59c4 | 57 | *buffer_addr = stream->buf.data(); |
4164020e SM |
58 | *buffer_sz = recv_len; |
59 | stream->offset += recv_len; | |
4a39caef | 60 | end: |
4164020e | 61 | return status; |
7cdc2bab MD |
62 | } |
63 | ||
4164020e | 64 | static bt_stream *medop_borrow_stream(bt_stream_class *stream_class, int64_t stream_id, void *data) |
7cdc2bab | 65 | { |
4164020e | 66 | lttng_live_stream_iterator *lttng_live_stream = (lttng_live_stream_iterator *) data; |
4164020e SM |
67 | |
68 | if (!lttng_live_stream->stream) { | |
69 | uint64_t stream_class_id = bt_stream_class_get_id(stream_class); | |
70 | ||
0f5c5d5c SM |
71 | BT_CPPLOGI_SPEC(lttng_live_stream->logger, |
72 | "Creating stream {} (ID: {}) out of stream class {}", | |
e28ca558 | 73 | lttng_live_stream->name, stream_id, stream_class_id); |
4164020e | 74 | |
0b68f2bc SM |
75 | bt_stream *stream; |
76 | ||
4164020e SM |
77 | if (stream_id < 0) { |
78 | /* | |
79 | * No stream instance ID in the stream. It's possible | |
80 | * to encounter this situation with older version of | |
81 | * LTTng. In these cases, use the viewer_stream_id that | |
82 | * is unique for a live viewer session. | |
83 | */ | |
0b68f2bc | 84 | stream = |
7916e7eb SM |
85 | bt_stream_create_with_id(stream_class, lttng_live_stream->trace->trace->libObjPtr(), |
86 | lttng_live_stream->viewer_stream_id); | |
4164020e | 87 | } else { |
0b68f2bc | 88 | stream = bt_stream_create_with_id( |
7916e7eb | 89 | stream_class, lttng_live_stream->trace->trace->libObjPtr(), (uint64_t) stream_id); |
4164020e SM |
90 | } |
91 | ||
0b68f2bc | 92 | if (!stream) { |
0f5c5d5c SM |
93 | BT_CPPLOGE_APPEND_CAUSE_SPEC( |
94 | lttng_live_stream->logger, | |
95 | "Cannot create stream {} (stream class ID {}, stream ID {})", | |
e28ca558 | 96 | lttng_live_stream->name, stream_class_id, stream_id); |
0b68f2bc | 97 | return nullptr; |
4164020e SM |
98 | } |
99 | ||
0b68f2bc | 100 | lttng_live_stream->stream = bt2::Stream::Shared::createWithoutRef(stream); |
e28ca558 SM |
101 | |
102 | lttng_live_stream->stream->name(lttng_live_stream->name); | |
4164020e | 103 | } |
7cdc2bab | 104 | |
0b68f2bc | 105 | return lttng_live_stream->stream->libObjPtr(); |
7cdc2bab MD |
106 | } |
107 | ||
18a1979b | 108 | static struct ctf_msg_iter_medium_ops medops = { |
4164020e SM |
109 | medop_request_bytes, |
110 | nullptr, | |
111 | nullptr, | |
112 | medop_borrow_stream, | |
7cdc2bab MD |
113 | }; |
114 | ||
4164020e SM |
115 | enum lttng_live_iterator_status lttng_live_lazy_msg_init(struct lttng_live_session *session, |
116 | bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 117 | { |
4164020e SM |
118 | struct lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
119 | uint64_t trace_idx, stream_iter_idx; | |
4164020e SM |
120 | |
121 | if (!session->lazy_stream_msg_init) { | |
122 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
123 | } | |
124 | ||
0f5c5d5c SM |
125 | BT_CPPLOGD_SPEC(session->logger, |
126 | "Lazily initializing self message iterator for live session: " | |
127 | "session-id={}, self-msg-iter-addr={}", | |
128 | session->id, fmt::ptr(self_msg_iter)); | |
4164020e SM |
129 | |
130 | for (trace_idx = 0; trace_idx < session->traces->len; trace_idx++) { | |
131 | struct lttng_live_trace *trace = | |
132 | (lttng_live_trace *) g_ptr_array_index(session->traces, trace_idx); | |
133 | ||
134 | for (stream_iter_idx = 0; stream_iter_idx < trace->stream_iterators->len; | |
135 | stream_iter_idx++) { | |
136 | struct ctf_trace_class *ctf_tc; | |
137 | struct lttng_live_stream_iterator *stream_iter = | |
138 | (lttng_live_stream_iterator *) g_ptr_array_index(trace->stream_iterators, | |
139 | stream_iter_idx); | |
140 | ||
141 | if (stream_iter->msg_iter) { | |
142 | continue; | |
143 | } | |
1fa280c9 | 144 | ctf_tc = ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
0f5c5d5c SM |
145 | BT_CPPLOGD_SPEC(stream_iter->logger, |
146 | "Creating CTF message iterator: session-id={}, ctf-tc-addr={}, " | |
147 | "stream-iter-name={}, self-msg-iter-addr={}", | |
e28ca558 | 148 | session->id, fmt::ptr(ctf_tc), stream_iter->name, |
0f5c5d5c | 149 | fmt::ptr(self_msg_iter)); |
4164020e SM |
150 | stream_iter->msg_iter = |
151 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, | |
2d5d8c7b | 152 | self_msg_iter, stream_iter->logger); |
4164020e | 153 | if (!stream_iter->msg_iter) { |
0f5c5d5c SM |
154 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
155 | "Failed to create CTF message iterator"); | |
4164020e SM |
156 | goto error; |
157 | } | |
158 | } | |
159 | } | |
160 | ||
161 | session->lazy_stream_msg_init = false; | |
162 | ||
163 | return LTTNG_LIVE_ITERATOR_STATUS_OK; | |
7cdc2bab MD |
164 | |
165 | error: | |
4164020e | 166 | return LTTNG_LIVE_ITERATOR_STATUS_ERROR; |
7cdc2bab MD |
167 | } |
168 | ||
4164020e SM |
169 | struct lttng_live_stream_iterator * |
170 | lttng_live_stream_iterator_create(struct lttng_live_session *session, uint64_t ctf_trace_id, | |
171 | uint64_t stream_id, bt_self_message_iterator *self_msg_iter) | |
7cdc2bab | 172 | { |
0f5c5d5c | 173 | lttng_live_stream_iterator *stream_iter = nullptr; |
e28ca558 | 174 | std::stringstream nameSs; |
4164020e SM |
175 | |
176 | BT_ASSERT(session); | |
177 | BT_ASSERT(session->lttng_live_msg_iter); | |
178 | BT_ASSERT(session->lttng_live_msg_iter->lttng_live_comp); | |
4164020e | 179 | |
0f5c5d5c SM |
180 | lttng_live_component *lttng_live = session->lttng_live_msg_iter->lttng_live_comp; |
181 | lttng_live_trace *trace = | |
182 | lttng_live_session_borrow_or_create_trace_by_id(session, ctf_trace_id); | |
4164020e | 183 | if (!trace) { |
0f5c5d5c | 184 | BT_CPPLOGE_APPEND_CAUSE_SPEC(session->logger, "Failed to borrow CTF trace."); |
4164020e SM |
185 | goto error; |
186 | } | |
187 | ||
0f5c5d5c | 188 | stream_iter = new lttng_live_stream_iterator {session->logger}; |
4164020e SM |
189 | stream_iter->trace = trace; |
190 | stream_iter->state = LTTNG_LIVE_STREAM_ACTIVE_NO_DATA; | |
191 | stream_iter->viewer_stream_id = stream_id; | |
192 | ||
193 | stream_iter->ctf_stream_class_id.is_set = false; | |
194 | stream_iter->ctf_stream_class_id.value = UINT64_MAX; | |
195 | ||
196 | stream_iter->last_inactivity_ts.is_set = false; | |
197 | stream_iter->last_inactivity_ts.value = 0; | |
198 | ||
199 | if (trace->trace) { | |
200 | struct ctf_trace_class *ctf_tc = | |
1fa280c9 | 201 | ctf_metadata_decoder_borrow_ctf_trace_class(trace->metadata->decoder.get()); |
4164020e | 202 | BT_ASSERT(!stream_iter->msg_iter); |
2d5d8c7b SM |
203 | stream_iter->msg_iter = |
204 | ctf_msg_iter_create(ctf_tc, lttng_live->max_query_size, medops, stream_iter, | |
205 | self_msg_iter, stream_iter->logger); | |
4164020e | 206 | if (!stream_iter->msg_iter) { |
0f5c5d5c SM |
207 | BT_CPPLOGE_APPEND_CAUSE_SPEC(stream_iter->logger, |
208 | "Failed to create CTF message iterator"); | |
4164020e SM |
209 | goto error; |
210 | } | |
211 | } | |
afbf59c4 | 212 | stream_iter->buf.resize(lttng_live->max_query_size); |
4164020e | 213 | |
e28ca558 SM |
214 | nameSs << STREAM_NAME_PREFIX << stream_iter->viewer_stream_id; |
215 | stream_iter->name = nameSs.str(); | |
4164020e SM |
216 | g_ptr_array_add(trace->stream_iterators, stream_iter); |
217 | ||
218 | /* Track the number of active stream iterator. */ | |
219 | session->lttng_live_msg_iter->active_stream_iter++; | |
220 | ||
221 | goto end; | |
7cdc2bab | 222 | error: |
ce4ee876 | 223 | delete stream_iter; |
4164020e | 224 | stream_iter = NULL; |
7cdc2bab | 225 | end: |
4164020e | 226 | return stream_iter; |
7cdc2bab MD |
227 | } |
228 | ||
ce4ee876 | 229 | lttng_live_stream_iterator::~lttng_live_stream_iterator() |
7cdc2bab | 230 | { |
4164020e | 231 | /* Track the number of active stream iterator. */ |
ce4ee876 SM |
232 | this->trace->session->lttng_live_msg_iter->active_stream_iter--; |
233 | } | |
14f28187 | 234 | |
ce4ee876 SM |
235 | void lttng_live_stream_iterator_destroy(struct lttng_live_stream_iterator *stream_iter) |
236 | { | |
afb0f12b | 237 | delete stream_iter; |
7cdc2bab | 238 | } |