Commit | Line | Data |
---|---|---|
3d1fc7fd | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
3d1fc7fd | 3 | * |
e92f3e28 MD |
4 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
5 | * | |
c0c0989a | 6 | * LTTng lib ring buffer client template. |
3d1fc7fd MD |
7 | */ |
8 | ||
9af5d97a | 9 | #include <limits.h> |
b4051ad8 | 10 | #include <stddef.h> |
9f3fdbc6 | 11 | #include <stdint.h> |
7753d283 MJ |
12 | |
13 | #include <ust-events-internal.h> | |
0950190a | 14 | #include <lttng/urcu/pointer.h> |
ae4b659d | 15 | #include "ust-bitfield.h" |
cd61d9bf | 16 | #include "ust-compat.h" |
b728d87e | 17 | #include "clock.h" |
cbbc1cda | 18 | #include "context-internal.h" |
7dd08bec | 19 | #include "lttng-tracer.h" |
9f3fdbc6 | 20 | #include "../libringbuffer/frontend_types.h" |
8936b6c0 | 21 | #include <urcu/tls-compat.h> |
3d1fc7fd | 22 | |
79dfbf42 MD |
23 | #define LTTNG_COMPACT_EVENT_BITS 5 |
24 | #define LTTNG_COMPACT_TSC_BITS 27 | |
25 | ||
ce7352a2 MD |
26 | enum app_ctx_mode { |
27 | APP_CTX_DISABLED, | |
28 | APP_CTX_ENABLED, | |
29 | }; | |
30 | ||
3d1fc7fd MD |
31 | /* |
32 | * Keep the natural field alignment for _each field_ within this structure if | |
33 | * you ever add/remove a field from this header. Packed attribute is not used | |
34 | * because gcc generates poor code on at least powerpc and mips. Don't ever | |
35 | * let gcc add padding between the structure elements. | |
36 | */ | |
37 | ||
38 | struct packet_header { | |
39 | /* Trace packet header */ | |
40 | uint32_t magic; /* | |
41 | * Trace magic number. | |
42 | * contains endianness information. | |
43 | */ | |
19d8b1b3 | 44 | uint8_t uuid[LTTNG_UST_UUID_LEN]; |
3d1fc7fd | 45 | uint32_t stream_id; |
2d94adc5 | 46 | uint64_t stream_instance_id; |
3d1fc7fd MD |
47 | |
48 | struct { | |
49 | /* Stream packet context */ | |
50 | uint64_t timestamp_begin; /* Cycle count at subbuffer start */ | |
51 | uint64_t timestamp_end; /* Cycle count at subbuffer end */ | |
0c00a107 MD |
52 | uint64_t content_size; /* Size of data in subbuffer */ |
53 | uint64_t packet_size; /* Subbuffer size (include padding) */ | |
1ff31389 | 54 | uint64_t packet_seq_num; /* Packet sequence number */ |
18fc8d71 | 55 | unsigned long events_discarded; /* |
3d1fc7fd MD |
56 | * Events lost in this subbuffer since |
57 | * the beginning of the trace. | |
58 | * (may overflow) | |
59 | */ | |
3d1fc7fd MD |
60 | uint32_t cpu_id; /* CPU id associated with stream */ |
61 | uint8_t header_end; /* End of header */ | |
62 | } ctx; | |
63 | }; | |
64 | ||
e56bb47c MD |
65 | struct lttng_client_ctx { |
66 | size_t packet_context_len; | |
67 | size_t event_context_len; | |
0950190a | 68 | struct lttng_ust_ctx *chan_ctx; |
a40b5b8c | 69 | struct lttng_ust_ctx *event_ctx; |
e56bb47c | 70 | }; |
3d1fc7fd | 71 | |
8936b6c0 MD |
72 | /* |
73 | * Indexed by lib_ring_buffer_nesting_count(). | |
74 | */ | |
75 | typedef struct lttng_ust_lib_ring_buffer_ctx_private private_ctx_stack_t[LIB_RING_BUFFER_MAX_NESTING]; | |
76 | static DEFINE_URCU_TLS(private_ctx_stack_t, private_ctx_stack); | |
77 | ||
78 | /* | |
79 | * Force a read (imply TLS fixup for dlopen) of TLS variables. | |
80 | */ | |
81 | static | |
82 | void lttng_fixup_rb_client_tls(void) | |
83 | { | |
84 | asm volatile ("" : : "m" (URCU_TLS(private_ctx_stack))); | |
85 | } | |
86 | ||
5198080d | 87 | static inline uint64_t lib_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan) |
3d1fc7fd MD |
88 | { |
89 | return trace_clock_read64(); | |
90 | } | |
91 | ||
92 | static inline | |
daacdbfc | 93 | size_t ctx_get_aligned_size(size_t offset, struct lttng_ust_ctx *ctx, |
e56bb47c | 94 | size_t ctx_len) |
3d1fc7fd | 95 | { |
3d1fc7fd MD |
96 | size_t orig_offset = offset; |
97 | ||
b5a3dfa5 | 98 | if (caa_likely(!ctx)) |
3d1fc7fd | 99 | return 0; |
3b8bedd8 | 100 | offset += lttng_ust_lib_ring_buffer_align(offset, ctx->largest_align); |
e56bb47c MD |
101 | offset += ctx_len; |
102 | return offset - orig_offset; | |
103 | } | |
104 | ||
105 | static inline | |
daacdbfc | 106 | void ctx_get_struct_size(struct lttng_ust_ctx *ctx, size_t *ctx_len, |
e56bb47c MD |
107 | enum app_ctx_mode mode) |
108 | { | |
109 | int i; | |
110 | size_t offset = 0; | |
111 | ||
112 | if (caa_likely(!ctx)) { | |
113 | *ctx_len = 0; | |
114 | return; | |
115 | } | |
ce7352a2 MD |
116 | for (i = 0; i < ctx->nr_fields; i++) { |
117 | if (mode == APP_CTX_ENABLED) { | |
daacdbfc | 118 | offset += ctx->fields[i]->get_size(ctx->fields[i], offset); |
ce7352a2 | 119 | } else { |
daacdbfc | 120 | if (lttng_context_is_app(ctx->fields[i]->event_field->name)) { |
ce7352a2 MD |
121 | /* |
122 | * Before UST 2.8, we cannot use the | |
123 | * application context, because we | |
124 | * cannot trust that the handler used | |
125 | * for get_size is the same used for | |
126 | * ctx_record, which would result in | |
127 | * corrupted traces when tracing | |
128 | * concurrently with application context | |
129 | * register/unregister. | |
130 | */ | |
daacdbfc | 131 | offset += lttng_ust_dummy_get_size(ctx->fields[i], offset); |
ce7352a2 | 132 | } else { |
daacdbfc | 133 | offset += ctx->fields[i]->get_size(ctx->fields[i], offset); |
ce7352a2 MD |
134 | } |
135 | } | |
136 | } | |
e56bb47c | 137 | *ctx_len = offset; |
3d1fc7fd MD |
138 | } |
139 | ||
140 | static inline | |
4cfec15c | 141 | void ctx_record(struct lttng_ust_lib_ring_buffer_ctx *bufctx, |
e7bc0ef6 | 142 | struct lttng_ust_channel_buffer *chan, |
daacdbfc | 143 | struct lttng_ust_ctx *ctx, |
ce7352a2 | 144 | enum app_ctx_mode mode) |
3d1fc7fd MD |
145 | { |
146 | int i; | |
147 | ||
b5a3dfa5 | 148 | if (caa_likely(!ctx)) |
3d1fc7fd | 149 | return; |
3b8bedd8 | 150 | lttng_ust_lib_ring_buffer_align_ctx(bufctx, ctx->largest_align); |
ce7352a2 MD |
151 | for (i = 0; i < ctx->nr_fields; i++) { |
152 | if (mode == APP_CTX_ENABLED) { | |
daacdbfc | 153 | ctx->fields[i]->record(ctx->fields[i], bufctx, chan); |
ce7352a2 | 154 | } else { |
daacdbfc | 155 | if (lttng_context_is_app(ctx->fields[i]->event_field->name)) { |
ce7352a2 MD |
156 | /* |
157 | * Before UST 2.8, we cannot use the | |
158 | * application context, because we | |
159 | * cannot trust that the handler used | |
160 | * for get_size is the same used for | |
161 | * ctx_record, which would result in | |
162 | * corrupted traces when tracing | |
163 | * concurrently with application context | |
164 | * register/unregister. | |
165 | */ | |
daacdbfc | 166 | lttng_ust_dummy_record(ctx->fields[i], bufctx, chan); |
ce7352a2 | 167 | } else { |
daacdbfc | 168 | ctx->fields[i]->record(ctx->fields[i], bufctx, chan); |
ce7352a2 MD |
169 | } |
170 | } | |
171 | } | |
3d1fc7fd MD |
172 | } |
173 | ||
174 | /* | |
175 | * record_header_size - Calculate the header size and padding necessary. | |
176 | * @config: ring buffer instance configuration | |
177 | * @chan: channel | |
178 | * @offset: offset in the write buffer | |
179 | * @pre_header_padding: padding to add before the header (output) | |
180 | * @ctx: reservation context | |
181 | * | |
182 | * Returns the event header size (including padding). | |
183 | * | |
184 | * The payload must itself determine its own alignment from the biggest type it | |
185 | * contains. | |
186 | */ | |
187 | static __inline__ | |
8ca68914 | 188 | size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, |
5198080d MJ |
189 | struct lttng_ust_lib_ring_buffer_channel *chan, |
190 | size_t offset, | |
3d1fc7fd | 191 | size_t *pre_header_padding, |
e56bb47c MD |
192 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
193 | struct lttng_client_ctx *client_ctx) | |
3d1fc7fd | 194 | { |
e7bc0ef6 | 195 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); |
3d1fc7fd MD |
196 | size_t orig_offset = offset; |
197 | size_t padding; | |
198 | ||
e7bc0ef6 | 199 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd | 200 | case 1: /* compact */ |
dc325c1d | 201 | padding = lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd | 202 | offset += padding; |
8936b6c0 | 203 | if (!(ctx->priv->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
3d1fc7fd MD |
204 | offset += sizeof(uint32_t); /* id and timestamp */ |
205 | } else { | |
79dfbf42 MD |
206 | /* Minimum space taken by LTTNG_COMPACT_EVENT_BITS id */ |
207 | offset += (LTTNG_COMPACT_EVENT_BITS + CHAR_BIT - 1) / CHAR_BIT; | |
3d1fc7fd | 208 | /* Align extended struct on largest member */ |
dc325c1d | 209 | offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 210 | offset += sizeof(uint32_t); /* id */ |
dc325c1d | 211 | offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
212 | offset += sizeof(uint64_t); /* timestamp */ |
213 | } | |
214 | break; | |
215 | case 2: /* large */ | |
dc325c1d | 216 | padding = lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint16_t)); |
3d1fc7fd MD |
217 | offset += padding; |
218 | offset += sizeof(uint16_t); | |
8936b6c0 | 219 | if (!(ctx->priv->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
dc325c1d | 220 | offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd MD |
221 | offset += sizeof(uint32_t); /* timestamp */ |
222 | } else { | |
223 | /* Align extended struct on largest member */ | |
dc325c1d | 224 | offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 225 | offset += sizeof(uint32_t); /* id */ |
dc325c1d | 226 | offset += lttng_ust_lib_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
227 | offset += sizeof(uint64_t); /* timestamp */ |
228 | } | |
229 | break; | |
230 | default: | |
9f3fdbc6 | 231 | padding = 0; |
3d1fc7fd MD |
232 | WARN_ON_ONCE(1); |
233 | } | |
0950190a | 234 | offset += ctx_get_aligned_size(offset, client_ctx->chan_ctx, |
2b7080aa | 235 | client_ctx->packet_context_len); |
a40b5b8c | 236 | offset += ctx_get_aligned_size(offset, client_ctx->event_ctx, |
2b7080aa | 237 | client_ctx->event_context_len); |
3d1fc7fd MD |
238 | *pre_header_padding = padding; |
239 | return offset - orig_offset; | |
240 | } | |
241 | ||
9f3fdbc6 | 242 | #include "../libringbuffer/api.h" |
82b9bde8 | 243 | #include "lttng-rb-clients.h" |
3d1fc7fd | 244 | |
9f3fdbc6 | 245 | static |
7dd08bec | 246 | void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config *config, |
4cfec15c | 247 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
0950190a | 248 | struct lttng_client_ctx *client_ctx, |
3d1fc7fd MD |
249 | uint32_t event_id); |
250 | ||
251 | /* | |
7dd08bec | 252 | * lttng_write_event_header |
3d1fc7fd MD |
253 | * |
254 | * Writes the event header to the offset (already aligned on 32-bits). | |
255 | * | |
256 | * @config: ring buffer instance configuration | |
257 | * @ctx: reservation context | |
258 | * @event_id: event ID | |
259 | */ | |
260 | static __inline__ | |
7dd08bec | 261 | void lttng_write_event_header(const struct lttng_ust_lib_ring_buffer_config *config, |
4cfec15c | 262 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
0950190a | 263 | struct lttng_client_ctx *client_ctx, |
3d1fc7fd MD |
264 | uint32_t event_id) |
265 | { | |
8936b6c0 | 266 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->priv->chan); |
3d1fc7fd | 267 | |
8936b6c0 | 268 | if (caa_unlikely(ctx->priv->rflags)) |
3d1fc7fd MD |
269 | goto slow_path; |
270 | ||
e7bc0ef6 | 271 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd MD |
272 | case 1: /* compact */ |
273 | { | |
274 | uint32_t id_time = 0; | |
275 | ||
79dfbf42 MD |
276 | bt_bitfield_write(&id_time, uint32_t, |
277 | 0, | |
278 | LTTNG_COMPACT_EVENT_BITS, | |
279 | event_id); | |
280 | bt_bitfield_write(&id_time, uint32_t, | |
281 | LTTNG_COMPACT_EVENT_BITS, | |
282 | LTTNG_COMPACT_TSC_BITS, | |
8936b6c0 | 283 | ctx->priv->tsc); |
3d1fc7fd MD |
284 | lib_ring_buffer_write(config, ctx, &id_time, sizeof(id_time)); |
285 | break; | |
286 | } | |
287 | case 2: /* large */ | |
288 | { | |
8936b6c0 | 289 | uint32_t timestamp = (uint32_t) ctx->priv->tsc; |
3d1fc7fd MD |
290 | uint16_t id = event_id; |
291 | ||
292 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); | |
dc325c1d | 293 | lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd MD |
294 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
295 | break; | |
296 | } | |
297 | default: | |
298 | WARN_ON_ONCE(1); | |
299 | } | |
300 | ||
0950190a | 301 | ctx_record(ctx, lttng_chan, client_ctx->chan_ctx, APP_CTX_ENABLED); |
a40b5b8c | 302 | ctx_record(ctx, lttng_chan, client_ctx->event_ctx, APP_CTX_ENABLED); |
3b8bedd8 | 303 | lttng_ust_lib_ring_buffer_align_ctx(ctx, ctx->largest_align); |
3d1fc7fd MD |
304 | |
305 | return; | |
306 | ||
307 | slow_path: | |
0950190a | 308 | lttng_write_event_header_slow(config, ctx, client_ctx, event_id); |
3d1fc7fd MD |
309 | } |
310 | ||
9f3fdbc6 | 311 | static |
7dd08bec | 312 | void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config *config, |
4cfec15c | 313 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
0950190a | 314 | struct lttng_client_ctx *client_ctx, |
3d1fc7fd MD |
315 | uint32_t event_id) |
316 | { | |
8936b6c0 MD |
317 | struct lttng_ust_lib_ring_buffer_ctx_private *ctx_private = ctx->priv; |
318 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->priv->chan); | |
3d1fc7fd | 319 | |
e7bc0ef6 | 320 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd | 321 | case 1: /* compact */ |
8936b6c0 | 322 | if (!(ctx_private->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
3d1fc7fd MD |
323 | uint32_t id_time = 0; |
324 | ||
79dfbf42 MD |
325 | bt_bitfield_write(&id_time, uint32_t, |
326 | 0, | |
327 | LTTNG_COMPACT_EVENT_BITS, | |
328 | event_id); | |
329 | bt_bitfield_write(&id_time, uint32_t, | |
330 | LTTNG_COMPACT_EVENT_BITS, | |
331 | LTTNG_COMPACT_TSC_BITS, | |
8936b6c0 | 332 | ctx_private->tsc); |
3d1fc7fd MD |
333 | lib_ring_buffer_write(config, ctx, &id_time, sizeof(id_time)); |
334 | } else { | |
335 | uint8_t id = 0; | |
8936b6c0 | 336 | uint64_t timestamp = ctx_private->tsc; |
3d1fc7fd | 337 | |
79dfbf42 MD |
338 | bt_bitfield_write(&id, uint8_t, |
339 | 0, | |
340 | LTTNG_COMPACT_EVENT_BITS, | |
341 | 31); | |
3d1fc7fd MD |
342 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); |
343 | /* Align extended struct on largest member */ | |
dc325c1d | 344 | lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 345 | lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id)); |
dc325c1d | 346 | lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
347 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
348 | } | |
349 | break; | |
350 | case 2: /* large */ | |
351 | { | |
8936b6c0 MD |
352 | if (!(ctx_private->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
353 | uint32_t timestamp = (uint32_t) ctx_private->tsc; | |
3d1fc7fd MD |
354 | uint16_t id = event_id; |
355 | ||
356 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); | |
dc325c1d | 357 | lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd MD |
358 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
359 | } else { | |
360 | uint16_t id = 65535; | |
8936b6c0 | 361 | uint64_t timestamp = ctx_private->tsc; |
3d1fc7fd MD |
362 | |
363 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); | |
364 | /* Align extended struct on largest member */ | |
dc325c1d | 365 | lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 366 | lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id)); |
dc325c1d | 367 | lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
368 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
369 | } | |
370 | break; | |
371 | } | |
372 | default: | |
373 | WARN_ON_ONCE(1); | |
374 | } | |
0950190a | 375 | ctx_record(ctx, lttng_chan, client_ctx->chan_ctx, APP_CTX_ENABLED); |
a40b5b8c | 376 | ctx_record(ctx, lttng_chan, client_ctx->event_ctx, APP_CTX_ENABLED); |
3b8bedd8 | 377 | lttng_ust_lib_ring_buffer_align_ctx(ctx, ctx->largest_align); |
3d1fc7fd MD |
378 | } |
379 | ||
4cfec15c | 380 | static const struct lttng_ust_lib_ring_buffer_config client_config; |
3d1fc7fd | 381 | |
5198080d | 382 | static uint64_t client_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan) |
3d1fc7fd MD |
383 | { |
384 | return lib_ring_buffer_clock_read(chan); | |
385 | } | |
386 | ||
387 | static | |
4cfec15c | 388 | size_t client_record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, |
5198080d MJ |
389 | struct lttng_ust_lib_ring_buffer_channel *chan, |
390 | size_t offset, | |
3d1fc7fd | 391 | size_t *pre_header_padding, |
e56bb47c MD |
392 | struct lttng_ust_lib_ring_buffer_ctx *ctx, |
393 | void *client_ctx) | |
3d1fc7fd MD |
394 | { |
395 | return record_header_size(config, chan, offset, | |
e56bb47c | 396 | pre_header_padding, ctx, client_ctx); |
3d1fc7fd MD |
397 | } |
398 | ||
399 | /** | |
400 | * client_packet_header_size - called on buffer-switch to a new sub-buffer | |
401 | * | |
402 | * Return header size without padding after the structure. Don't use packed | |
403 | * structure because gcc generates inefficient code on some architectures | |
404 | * (powerpc, mips..) | |
405 | */ | |
406 | static size_t client_packet_header_size(void) | |
407 | { | |
408 | return offsetof(struct packet_header, ctx.header_end); | |
409 | } | |
410 | ||
23c8854a | 411 | static void client_buffer_begin(struct lttng_ust_lib_ring_buffer *buf, uint64_t tsc, |
1d498196 | 412 | unsigned int subbuf_idx, |
38fae1d3 | 413 | struct lttng_ust_shm_handle *handle) |
3d1fc7fd | 414 | { |
5198080d | 415 | struct lttng_ust_lib_ring_buffer_channel *chan = shmp(handle, buf->backend.chan); |
3d1fc7fd MD |
416 | struct packet_header *header = |
417 | (struct packet_header *) | |
418 | lib_ring_buffer_offset_address(&buf->backend, | |
1d498196 MD |
419 | subbuf_idx * chan->backend.subbuf_size, |
420 | handle); | |
e7bc0ef6 | 421 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); |
1ff31389 | 422 | uint64_t cnt = shmp_index(handle, buf->backend.buf_cnt, subbuf_idx)->seq_cnt; |
3d1fc7fd | 423 | |
34daae3e MD |
424 | assert(header); |
425 | if (!header) | |
426 | return; | |
3d1fc7fd | 427 | header->magic = CTF_MAGIC_NUMBER; |
e7bc0ef6 MD |
428 | memcpy(header->uuid, lttng_chan->priv->uuid, sizeof(lttng_chan->priv->uuid)); |
429 | header->stream_id = lttng_chan->priv->id; | |
2d94adc5 | 430 | header->stream_instance_id = buf->backend.cpu; |
3d1fc7fd MD |
431 | header->ctx.timestamp_begin = tsc; |
432 | header->ctx.timestamp_end = 0; | |
0c00a107 MD |
433 | header->ctx.content_size = ~0ULL; /* for debugging */ |
434 | header->ctx.packet_size = ~0ULL; | |
1ff31389 | 435 | header->ctx.packet_seq_num = chan->backend.num_subbuf * cnt + subbuf_idx; |
3d1fc7fd | 436 | header->ctx.events_discarded = 0; |
3d1fc7fd MD |
437 | header->ctx.cpu_id = buf->backend.cpu; |
438 | } | |
439 | ||
440 | /* | |
441 | * offset is assumed to never be 0 here : never deliver a completely empty | |
442 | * subbuffer. data_size is between 1 and subbuf_size. | |
443 | */ | |
23c8854a | 444 | static void client_buffer_end(struct lttng_ust_lib_ring_buffer *buf, uint64_t tsc, |
1d498196 | 445 | unsigned int subbuf_idx, unsigned long data_size, |
38fae1d3 | 446 | struct lttng_ust_shm_handle *handle) |
3d1fc7fd | 447 | { |
5198080d | 448 | struct lttng_ust_lib_ring_buffer_channel *chan = shmp(handle, buf->backend.chan); |
3d1fc7fd MD |
449 | struct packet_header *header = |
450 | (struct packet_header *) | |
451 | lib_ring_buffer_offset_address(&buf->backend, | |
1d498196 MD |
452 | subbuf_idx * chan->backend.subbuf_size, |
453 | handle); | |
3d1fc7fd MD |
454 | unsigned long records_lost = 0; |
455 | ||
34daae3e MD |
456 | assert(header); |
457 | if (!header) | |
458 | return; | |
3d1fc7fd | 459 | header->ctx.timestamp_end = tsc; |
b1830883 MD |
460 | header->ctx.content_size = |
461 | (uint64_t) data_size * CHAR_BIT; /* in bits */ | |
462 | header->ctx.packet_size = | |
b72687b8 | 463 | (uint64_t) LTTNG_UST_PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */ |
04489ab4 MD |
464 | |
465 | records_lost += lib_ring_buffer_get_records_lost_full(&client_config, buf); | |
3d1fc7fd MD |
466 | records_lost += lib_ring_buffer_get_records_lost_wrap(&client_config, buf); |
467 | records_lost += lib_ring_buffer_get_records_lost_big(&client_config, buf); | |
468 | header->ctx.events_discarded = records_lost; | |
469 | } | |
470 | ||
4cfec15c | 471 | static int client_buffer_create(struct lttng_ust_lib_ring_buffer *buf, void *priv, |
38fae1d3 | 472 | int cpu, const char *name, struct lttng_ust_shm_handle *handle) |
3d1fc7fd MD |
473 | { |
474 | return 0; | |
475 | } | |
476 | ||
4cfec15c | 477 | static void client_buffer_finalize(struct lttng_ust_lib_ring_buffer *buf, void *priv, int cpu, struct lttng_ust_shm_handle *handle) |
3d1fc7fd MD |
478 | { |
479 | } | |
480 | ||
a9ff648c MD |
481 | static void client_content_size_field(const struct lttng_ust_lib_ring_buffer_config *config, |
482 | size_t *offset, size_t *length) | |
483 | { | |
484 | *offset = offsetof(struct packet_header, ctx.content_size); | |
485 | *length = sizeof(((struct packet_header *) NULL)->ctx.content_size); | |
486 | } | |
487 | ||
488 | static void client_packet_size_field(const struct lttng_ust_lib_ring_buffer_config *config, | |
489 | size_t *offset, size_t *length) | |
490 | { | |
491 | *offset = offsetof(struct packet_header, ctx.packet_size); | |
492 | *length = sizeof(((struct packet_header *) NULL)->ctx.packet_size); | |
493 | } | |
494 | ||
b2f3252a JD |
495 | static struct packet_header *client_packet_header(struct lttng_ust_lib_ring_buffer *buf, |
496 | struct lttng_ust_shm_handle *handle) | |
497 | { | |
c4d6bd10 | 498 | return lib_ring_buffer_read_offset_address(&buf->backend, 0, handle); |
b2f3252a JD |
499 | } |
500 | ||
501 | static int client_timestamp_begin(struct lttng_ust_lib_ring_buffer *buf, | |
07539b34 | 502 | struct lttng_ust_lib_ring_buffer_channel *chan, |
b2f3252a JD |
503 | uint64_t *timestamp_begin) |
504 | { | |
07539b34 | 505 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
506 | struct packet_header *header; |
507 | ||
508 | header = client_packet_header(buf, handle); | |
34daae3e MD |
509 | if (!header) |
510 | return -1; | |
b2f3252a JD |
511 | *timestamp_begin = header->ctx.timestamp_begin; |
512 | return 0; | |
513 | } | |
514 | ||
515 | static int client_timestamp_end(struct lttng_ust_lib_ring_buffer *buf, | |
07539b34 | 516 | struct lttng_ust_lib_ring_buffer_channel *chan, |
b2f3252a JD |
517 | uint64_t *timestamp_end) |
518 | { | |
07539b34 | 519 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
520 | struct packet_header *header; |
521 | ||
522 | header = client_packet_header(buf, handle); | |
34daae3e MD |
523 | if (!header) |
524 | return -1; | |
b2f3252a JD |
525 | *timestamp_end = header->ctx.timestamp_end; |
526 | return 0; | |
527 | } | |
528 | ||
529 | static int client_events_discarded(struct lttng_ust_lib_ring_buffer *buf, | |
07539b34 | 530 | struct lttng_ust_lib_ring_buffer_channel *chan, |
b2f3252a JD |
531 | uint64_t *events_discarded) |
532 | { | |
07539b34 | 533 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
534 | struct packet_header *header; |
535 | ||
536 | header = client_packet_header(buf, handle); | |
34daae3e MD |
537 | if (!header) |
538 | return -1; | |
b2f3252a JD |
539 | *events_discarded = header->ctx.events_discarded; |
540 | return 0; | |
541 | } | |
542 | ||
543 | static int client_content_size(struct lttng_ust_lib_ring_buffer *buf, | |
07539b34 | 544 | struct lttng_ust_lib_ring_buffer_channel *chan, |
b2f3252a JD |
545 | uint64_t *content_size) |
546 | { | |
07539b34 | 547 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
548 | struct packet_header *header; |
549 | ||
550 | header = client_packet_header(buf, handle); | |
34daae3e MD |
551 | if (!header) |
552 | return -1; | |
b2f3252a JD |
553 | *content_size = header->ctx.content_size; |
554 | return 0; | |
555 | } | |
556 | ||
557 | static int client_packet_size(struct lttng_ust_lib_ring_buffer *buf, | |
07539b34 | 558 | struct lttng_ust_lib_ring_buffer_channel *chan, |
b2f3252a JD |
559 | uint64_t *packet_size) |
560 | { | |
07539b34 | 561 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
562 | struct packet_header *header; |
563 | ||
564 | header = client_packet_header(buf, handle); | |
34daae3e MD |
565 | if (!header) |
566 | return -1; | |
b2f3252a JD |
567 | *packet_size = header->ctx.packet_size; |
568 | return 0; | |
569 | } | |
570 | ||
571 | static int client_stream_id(struct lttng_ust_lib_ring_buffer *buf, | |
07539b34 | 572 | struct lttng_ust_lib_ring_buffer_channel *chan, |
b2f3252a JD |
573 | uint64_t *stream_id) |
574 | { | |
e7bc0ef6 | 575 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); |
db95cf8b | 576 | |
e7bc0ef6 | 577 | *stream_id = lttng_chan->priv->id; |
b2f3252a | 578 | |
b2f3252a JD |
579 | return 0; |
580 | } | |
581 | ||
fca361e8 | 582 | static int client_current_timestamp(struct lttng_ust_lib_ring_buffer *buf, |
07539b34 | 583 | struct lttng_ust_lib_ring_buffer_channel *chan, |
fca361e8 JD |
584 | uint64_t *ts) |
585 | { | |
fca361e8 JD |
586 | *ts = client_ring_buffer_clock_read(chan); |
587 | ||
588 | return 0; | |
589 | } | |
590 | ||
1ff31389 | 591 | static int client_sequence_number(struct lttng_ust_lib_ring_buffer *buf, |
07539b34 | 592 | struct lttng_ust_lib_ring_buffer_channel *chan, |
1ff31389 JD |
593 | uint64_t *seq) |
594 | { | |
07539b34 | 595 | struct lttng_ust_shm_handle *handle = chan->handle; |
1ff31389 JD |
596 | struct packet_header *header; |
597 | ||
598 | header = client_packet_header(buf, handle); | |
3e1db88d MD |
599 | if (!header) |
600 | return -1; | |
1ff31389 JD |
601 | *seq = header->ctx.packet_seq_num; |
602 | return 0; | |
603 | } | |
604 | ||
45a00b05 | 605 | static int client_instance_id(struct lttng_ust_lib_ring_buffer *buf, |
07539b34 | 606 | struct lttng_ust_lib_ring_buffer_channel *chan, |
45a00b05 JD |
607 | uint64_t *id) |
608 | { | |
db95cf8b | 609 | *id = buf->backend.cpu; |
45a00b05 | 610 | |
45a00b05 JD |
611 | return 0; |
612 | } | |
613 | ||
82b9bde8 JD |
614 | static const |
615 | struct lttng_ust_client_lib_ring_buffer_client_cb client_cb = { | |
616 | .parent = { | |
617 | .ring_buffer_clock_read = client_ring_buffer_clock_read, | |
618 | .record_header_size = client_record_header_size, | |
619 | .subbuffer_header_size = client_packet_header_size, | |
620 | .buffer_begin = client_buffer_begin, | |
621 | .buffer_end = client_buffer_end, | |
622 | .buffer_create = client_buffer_create, | |
623 | .buffer_finalize = client_buffer_finalize, | |
a9ff648c MD |
624 | .content_size_field = client_content_size_field, |
625 | .packet_size_field = client_packet_size_field, | |
82b9bde8 | 626 | }, |
b2f3252a JD |
627 | .timestamp_begin = client_timestamp_begin, |
628 | .timestamp_end = client_timestamp_end, | |
629 | .events_discarded = client_events_discarded, | |
630 | .content_size = client_content_size, | |
631 | .packet_size = client_packet_size, | |
632 | .stream_id = client_stream_id, | |
fca361e8 | 633 | .current_timestamp = client_current_timestamp, |
1ff31389 | 634 | .sequence_number = client_sequence_number, |
45a00b05 | 635 | .instance_id = client_instance_id, |
82b9bde8 JD |
636 | }; |
637 | ||
4cfec15c | 638 | static const struct lttng_ust_lib_ring_buffer_config client_config = { |
3d1fc7fd MD |
639 | .cb.ring_buffer_clock_read = client_ring_buffer_clock_read, |
640 | .cb.record_header_size = client_record_header_size, | |
641 | .cb.subbuffer_header_size = client_packet_header_size, | |
642 | .cb.buffer_begin = client_buffer_begin, | |
643 | .cb.buffer_end = client_buffer_end, | |
644 | .cb.buffer_create = client_buffer_create, | |
645 | .cb.buffer_finalize = client_buffer_finalize, | |
a9ff648c MD |
646 | .cb.content_size_field = client_content_size_field, |
647 | .cb.packet_size_field = client_packet_size_field, | |
3d1fc7fd | 648 | |
79dfbf42 | 649 | .tsc_bits = LTTNG_COMPACT_TSC_BITS, |
3d1fc7fd | 650 | .alloc = RING_BUFFER_ALLOC_PER_CPU, |
5d61a504 | 651 | .sync = RING_BUFFER_SYNC_GLOBAL, |
3d1fc7fd MD |
652 | .mode = RING_BUFFER_MODE_TEMPLATE, |
653 | .backend = RING_BUFFER_PAGE, | |
5d61a504 | 654 | .output = RING_BUFFER_MMAP, |
3d1fc7fd | 655 | .oops = RING_BUFFER_OOPS_CONSISTENCY, |
5d61a504 | 656 | .ipi = RING_BUFFER_NO_IPI_BARRIER, |
34a91bdb | 657 | .wakeup = LTTNG_CLIENT_WAKEUP, |
c1fca457 | 658 | .client_type = LTTNG_CLIENT_TYPE, |
82b9bde8 JD |
659 | |
660 | .cb_ptr = &client_cb.parent, | |
3d1fc7fd MD |
661 | }; |
662 | ||
663 | static | |
e7bc0ef6 | 664 | struct lttng_ust_channel_buffer *_channel_create(const char *name, |
a3f61e7f | 665 | void *buf_addr, |
3d1fc7fd MD |
666 | size_t subbuf_size, size_t num_subbuf, |
667 | unsigned int switch_timer_interval, | |
193183fb | 668 | unsigned int read_timer_interval, |
6ca18e66 | 669 | unsigned char *uuid, |
a9ff648c | 670 | uint32_t chan_id, |
b2c5f61a MD |
671 | const int *stream_fds, int nr_stream_fds, |
672 | int64_t blocking_timeout) | |
3d1fc7fd | 673 | { |
f0fde1c3 | 674 | struct lttng_ust_abi_channel_config chan_priv_init; |
a3f61e7f | 675 | struct lttng_ust_shm_handle *handle; |
e7bc0ef6 | 676 | struct lttng_ust_channel_buffer *lttng_chan_buf; |
f0fde1c3 | 677 | |
e7bc0ef6 MD |
678 | lttng_chan_buf = lttng_ust_alloc_channel_buffer(); |
679 | if (!lttng_chan_buf) | |
f0fde1c3 | 680 | return NULL; |
e7bc0ef6 MD |
681 | memcpy(lttng_chan_buf->priv->uuid, uuid, LTTNG_UST_UUID_LEN); |
682 | lttng_chan_buf->priv->id = chan_id; | |
a3f61e7f | 683 | |
74d81a6c MD |
684 | memset(&chan_priv_init, 0, sizeof(chan_priv_init)); |
685 | memcpy(chan_priv_init.uuid, uuid, LTTNG_UST_UUID_LEN); | |
6ca18e66 | 686 | chan_priv_init.id = chan_id; |
f0fde1c3 | 687 | |
a3f61e7f | 688 | handle = channel_create(&client_config, name, |
f0fde1c3 MD |
689 | __alignof__(struct lttng_ust_abi_channel_config), |
690 | sizeof(struct lttng_ust_abi_channel_config), | |
74d81a6c | 691 | &chan_priv_init, |
e7bc0ef6 | 692 | lttng_chan_buf, buf_addr, subbuf_size, num_subbuf, |
a9ff648c | 693 | switch_timer_interval, read_timer_interval, |
b2c5f61a | 694 | stream_fds, nr_stream_fds, blocking_timeout); |
a3f61e7f | 695 | if (!handle) |
f0fde1c3 | 696 | goto error; |
07539b34 | 697 | lttng_chan_buf->priv->rb_chan = shmp(handle, handle->chan); |
e7bc0ef6 | 698 | return lttng_chan_buf; |
f0fde1c3 MD |
699 | |
700 | error: | |
e7bc0ef6 | 701 | lttng_ust_free_channel_common(lttng_chan_buf->parent); |
f0fde1c3 | 702 | return NULL; |
3d1fc7fd MD |
703 | } |
704 | ||
705 | static | |
e7bc0ef6 | 706 | void lttng_channel_destroy(struct lttng_ust_channel_buffer *lttng_chan_buf) |
3d1fc7fd | 707 | { |
07539b34 | 708 | channel_destroy(lttng_chan_buf->priv->rb_chan, lttng_chan_buf->priv->rb_chan->handle, 1); |
e7bc0ef6 | 709 | lttng_ust_free_channel_common(lttng_chan_buf->parent); |
3d1fc7fd MD |
710 | } |
711 | ||
712 | static | |
8936b6c0 | 713 | int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx) |
3d1fc7fd | 714 | { |
8936b6c0 | 715 | struct lttng_ust_event_recorder *event_recorder = ctx->client_priv; |
07539b34 | 716 | struct lttng_ust_channel_buffer *lttng_chan = event_recorder->chan; |
e56bb47c | 717 | struct lttng_client_ctx client_ctx; |
8936b6c0 MD |
718 | int ret, nesting; |
719 | struct lttng_ust_lib_ring_buffer_ctx_private *private_ctx; | |
720 | uint32_t event_id; | |
3d1fc7fd | 721 | |
8936b6c0 | 722 | event_id = event_recorder->priv->id; |
0950190a | 723 | client_ctx.chan_ctx = lttng_ust_rcu_dereference(lttng_chan->priv->ctx); |
a40b5b8c | 724 | client_ctx.event_ctx = lttng_ust_rcu_dereference(event_recorder->priv->ctx); |
e56bb47c | 725 | /* Compute internal size of context structures. */ |
0950190a | 726 | ctx_get_struct_size(client_ctx.chan_ctx, &client_ctx.packet_context_len, |
2b7080aa | 727 | APP_CTX_ENABLED); |
a40b5b8c | 728 | ctx_get_struct_size(client_ctx.event_ctx, &client_ctx.event_context_len, |
2b7080aa | 729 | APP_CTX_ENABLED); |
e56bb47c | 730 | |
8936b6c0 MD |
731 | nesting = lib_ring_buffer_nesting_inc(&client_config); |
732 | if (nesting < 0) | |
3d1fc7fd | 733 | return -EPERM; |
3d1fc7fd | 734 | |
f37bd904 | 735 | private_ctx = &URCU_TLS(private_ctx_stack)[nesting]; |
8936b6c0 MD |
736 | memset(private_ctx, 0, sizeof(*private_ctx)); |
737 | private_ctx->pub = ctx; | |
738 | private_ctx->chan = lttng_chan->priv->rb_chan; | |
739 | ||
740 | ctx->priv = private_ctx; | |
741 | ||
e7bc0ef6 | 742 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd MD |
743 | case 1: /* compact */ |
744 | if (event_id > 30) | |
8936b6c0 | 745 | private_ctx->rflags |= LTTNG_RFLAG_EXTENDED; |
3d1fc7fd MD |
746 | break; |
747 | case 2: /* large */ | |
748 | if (event_id > 65534) | |
8936b6c0 | 749 | private_ctx->rflags |= LTTNG_RFLAG_EXTENDED; |
3d1fc7fd MD |
750 | break; |
751 | default: | |
752 | WARN_ON_ONCE(1); | |
753 | } | |
754 | ||
e56bb47c | 755 | ret = lib_ring_buffer_reserve(&client_config, ctx, &client_ctx); |
630d6836 | 756 | if (caa_unlikely(ret)) |
3d1fc7fd | 757 | goto put; |
2b7080aa | 758 | if (lib_ring_buffer_backend_get_pages(&client_config, ctx, |
8936b6c0 | 759 | &private_ctx->backend_pages)) { |
2b7080aa MD |
760 | ret = -EPERM; |
761 | goto put; | |
a3492932 | 762 | } |
0950190a | 763 | lttng_write_event_header(&client_config, ctx, &client_ctx, event_id); |
3d1fc7fd MD |
764 | return 0; |
765 | put: | |
7489fcb4 | 766 | lib_ring_buffer_nesting_dec(&client_config); |
3d1fc7fd MD |
767 | return ret; |
768 | } | |
769 | ||
770 | static | |
7dd08bec | 771 | void lttng_event_commit(struct lttng_ust_lib_ring_buffer_ctx *ctx) |
3d1fc7fd MD |
772 | { |
773 | lib_ring_buffer_commit(&client_config, ctx); | |
7489fcb4 | 774 | lib_ring_buffer_nesting_dec(&client_config); |
3d1fc7fd MD |
775 | } |
776 | ||
777 | static | |
8936b6c0 MD |
778 | void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
779 | const void *src, size_t len, size_t alignment) | |
3d1fc7fd | 780 | { |
8936b6c0 | 781 | lttng_ust_lib_ring_buffer_align_ctx(ctx, alignment); |
3d1fc7fd MD |
782 | lib_ring_buffer_write(&client_config, ctx, src, len); |
783 | } | |
784 | ||
a44c74d9 | 785 | static |
8936b6c0 MD |
786 | void lttng_event_strcpy(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
787 | const char *src, size_t len) | |
a44c74d9 MD |
788 | { |
789 | lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#'); | |
790 | } | |
791 | ||
27927814 | 792 | static |
879f9b0a | 793 | void lttng_event_pstrcpy_pad(struct lttng_ust_lib_ring_buffer_ctx *ctx, |
8936b6c0 | 794 | const char *src, size_t len) |
27927814 | 795 | { |
879f9b0a | 796 | lib_ring_buffer_pstrcpy(&client_config, ctx, src, len, '\0'); |
27927814 MD |
797 | } |
798 | ||
3d1fc7fd | 799 | static |
07539b34 | 800 | int lttng_is_finalized(struct lttng_ust_channel_buffer *chan) |
3d1fc7fd | 801 | { |
07539b34 | 802 | struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; |
3d1fc7fd | 803 | |
07539b34 | 804 | return lib_ring_buffer_channel_is_finalized(rb_chan); |
3d1fc7fd MD |
805 | } |
806 | ||
807 | static | |
07539b34 | 808 | int lttng_is_disabled(struct lttng_ust_channel_buffer *chan) |
3d1fc7fd | 809 | { |
07539b34 | 810 | struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; |
3d1fc7fd | 811 | |
07539b34 | 812 | return lib_ring_buffer_channel_is_disabled(rb_chan); |
3d1fc7fd MD |
813 | } |
814 | ||
43861eab | 815 | static |
07539b34 | 816 | int lttng_flush_buffer(struct lttng_ust_channel_buffer *chan) |
43861eab | 817 | { |
07539b34 | 818 | struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; |
4cfec15c | 819 | struct lttng_ust_lib_ring_buffer *buf; |
43861eab MD |
820 | int cpu; |
821 | ||
07539b34 | 822 | for_each_channel_cpu(cpu, rb_chan) { |
74d81a6c MD |
823 | int shm_fd, wait_fd, wakeup_fd; |
824 | uint64_t memory_map_size; | |
43861eab | 825 | |
07539b34 MD |
826 | buf = channel_get_ring_buffer(&client_config, rb_chan, |
827 | cpu, rb_chan->handle, &shm_fd, &wait_fd, | |
74d81a6c | 828 | &wakeup_fd, &memory_map_size); |
43861eab | 829 | lib_ring_buffer_switch(&client_config, buf, |
07539b34 | 830 | SWITCH_ACTIVE, rb_chan->handle); |
43861eab MD |
831 | } |
832 | return 0; | |
833 | } | |
834 | ||
7dd08bec | 835 | static struct lttng_transport lttng_relay_transport = { |
818173b9 | 836 | .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap", |
3d1fc7fd | 837 | .ops = { |
14b6f891 MD |
838 | .struct_size = sizeof(struct lttng_ust_channel_buffer_ops), |
839 | .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_channel_buffer_ops_private, { | |
a880bae5 MD |
840 | .pub = <tng_relay_transport.ops, |
841 | .channel_create = _channel_create, | |
842 | .channel_destroy = lttng_channel_destroy, | |
843 | .packet_avail_size = NULL, /* Would be racy anyway */ | |
844 | .is_finalized = lttng_is_finalized, | |
845 | .is_disabled = lttng_is_disabled, | |
846 | .flush_buffer = lttng_flush_buffer, | |
847 | }), | |
7dd08bec MD |
848 | .event_reserve = lttng_event_reserve, |
849 | .event_commit = lttng_event_commit, | |
850 | .event_write = lttng_event_write, | |
a44c74d9 | 851 | .event_strcpy = lttng_event_strcpy, |
879f9b0a | 852 | .event_pstrcpy_pad = lttng_event_pstrcpy_pad, |
3d1fc7fd | 853 | }, |
74d81a6c | 854 | .client_config = &client_config, |
3d1fc7fd MD |
855 | }; |
856 | ||
edaa1431 | 857 | void RING_BUFFER_MODE_TEMPLATE_INIT(void) |
3d1fc7fd | 858 | { |
34a91bdb MD |
859 | DBG("LTT : ltt ring buffer client \"%s\" init\n", |
860 | "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap"); | |
8936b6c0 | 861 | lttng_fixup_rb_client_tls(); |
7dd08bec | 862 | lttng_transport_register(<tng_relay_transport); |
3d1fc7fd MD |
863 | } |
864 | ||
edaa1431 | 865 | void RING_BUFFER_MODE_TEMPLATE_EXIT(void) |
3d1fc7fd | 866 | { |
34a91bdb MD |
867 | DBG("LTT : ltt ring buffer client \"%s\" exit\n", |
868 | "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap"); | |
7dd08bec | 869 | lttng_transport_unregister(<tng_relay_transport); |
3d1fc7fd | 870 | } |