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 | 12 | |
36c52fff | 13 | #include "lib/lttng-ust/events.h" |
0950190a | 14 | #include <lttng/urcu/pointer.h> |
9d315d6d MJ |
15 | #include "common/bitfield.h" |
16 | #include "common/align.h" | |
f41a6b5f | 17 | #include "common/clock.h" |
cbbc1cda | 18 | #include "context-internal.h" |
7dd08bec | 19 | #include "lttng-tracer.h" |
e4db8f98 | 20 | #include "common/ringbuffer/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 | ||
3d1fc7fd MD |
26 | /* |
27 | * Keep the natural field alignment for _each field_ within this structure if | |
28 | * you ever add/remove a field from this header. Packed attribute is not used | |
29 | * because gcc generates poor code on at least powerpc and mips. Don't ever | |
30 | * let gcc add padding between the structure elements. | |
31 | */ | |
32 | ||
33 | struct packet_header { | |
34 | /* Trace packet header */ | |
35 | uint32_t magic; /* | |
36 | * Trace magic number. | |
37 | * contains endianness information. | |
38 | */ | |
19d8b1b3 | 39 | uint8_t uuid[LTTNG_UST_UUID_LEN]; |
3d1fc7fd | 40 | uint32_t stream_id; |
2d94adc5 | 41 | uint64_t stream_instance_id; |
3d1fc7fd MD |
42 | |
43 | struct { | |
44 | /* Stream packet context */ | |
45 | uint64_t timestamp_begin; /* Cycle count at subbuffer start */ | |
46 | uint64_t timestamp_end; /* Cycle count at subbuffer end */ | |
0c00a107 MD |
47 | uint64_t content_size; /* Size of data in subbuffer */ |
48 | uint64_t packet_size; /* Subbuffer size (include padding) */ | |
1ff31389 | 49 | uint64_t packet_seq_num; /* Packet sequence number */ |
18fc8d71 | 50 | unsigned long events_discarded; /* |
3d1fc7fd MD |
51 | * Events lost in this subbuffer since |
52 | * the beginning of the trace. | |
53 | * (may overflow) | |
54 | */ | |
3d1fc7fd MD |
55 | uint32_t cpu_id; /* CPU id associated with stream */ |
56 | uint8_t header_end; /* End of header */ | |
57 | } ctx; | |
58 | }; | |
59 | ||
e56bb47c MD |
60 | struct lttng_client_ctx { |
61 | size_t packet_context_len; | |
62 | size_t event_context_len; | |
0950190a | 63 | struct lttng_ust_ctx *chan_ctx; |
a40b5b8c | 64 | struct lttng_ust_ctx *event_ctx; |
e56bb47c | 65 | }; |
3d1fc7fd | 66 | |
8936b6c0 MD |
67 | /* |
68 | * Indexed by lib_ring_buffer_nesting_count(). | |
69 | */ | |
b5457df5 | 70 | typedef struct lttng_ust_ring_buffer_ctx_private private_ctx_stack_t[LIB_RING_BUFFER_MAX_NESTING]; |
8936b6c0 MD |
71 | static DEFINE_URCU_TLS(private_ctx_stack_t, private_ctx_stack); |
72 | ||
73 | /* | |
a9fd951a | 74 | * Force a read (imply TLS allocation for dlopen) of TLS variables. |
8936b6c0 | 75 | */ |
a9fd951a | 76 | void RING_BUFFER_MODE_TEMPLATE_ALLOC_TLS(void) |
8936b6c0 MD |
77 | { |
78 | asm volatile ("" : : "m" (URCU_TLS(private_ctx_stack))); | |
79 | } | |
80 | ||
2208d8b5 | 81 | static inline uint64_t lib_ring_buffer_clock_read( |
b5457df5 | 82 | struct lttng_ust_ring_buffer_channel *chan __attribute__((unused))) |
3d1fc7fd MD |
83 | { |
84 | return trace_clock_read64(); | |
85 | } | |
86 | ||
87 | static inline | |
daacdbfc | 88 | size_t ctx_get_aligned_size(size_t offset, struct lttng_ust_ctx *ctx, |
e56bb47c | 89 | size_t ctx_len) |
3d1fc7fd | 90 | { |
3d1fc7fd MD |
91 | size_t orig_offset = offset; |
92 | ||
b5a3dfa5 | 93 | if (caa_likely(!ctx)) |
3d1fc7fd | 94 | return 0; |
b5457df5 | 95 | offset += lttng_ust_ring_buffer_align(offset, ctx->largest_align); |
e56bb47c MD |
96 | offset += ctx_len; |
97 | return offset - orig_offset; | |
98 | } | |
99 | ||
100 | static inline | |
b2e37d27 MD |
101 | void ctx_get_struct_size(struct lttng_ust_ring_buffer_ctx *bufctx, |
102 | struct lttng_ust_ctx *ctx, size_t *ctx_len) | |
e56bb47c MD |
103 | { |
104 | int i; | |
105 | size_t offset = 0; | |
106 | ||
107 | if (caa_likely(!ctx)) { | |
108 | *ctx_len = 0; | |
109 | return; | |
110 | } | |
69e21fdf | 111 | for (i = 0; i < ctx->nr_fields; i++) |
b2e37d27 | 112 | offset += ctx->fields[i].get_size(ctx->fields[i].priv, bufctx->probe_ctx, offset); |
e56bb47c | 113 | *ctx_len = offset; |
3d1fc7fd MD |
114 | } |
115 | ||
116 | static inline | |
b5457df5 | 117 | void ctx_record(struct lttng_ust_ring_buffer_ctx *bufctx, |
e7bc0ef6 | 118 | struct lttng_ust_channel_buffer *chan, |
69e21fdf | 119 | struct lttng_ust_ctx *ctx) |
3d1fc7fd MD |
120 | { |
121 | int i; | |
122 | ||
b5a3dfa5 | 123 | if (caa_likely(!ctx)) |
3d1fc7fd | 124 | return; |
b5457df5 | 125 | lttng_ust_ring_buffer_align_ctx(bufctx, ctx->largest_align); |
69e21fdf | 126 | for (i = 0; i < ctx->nr_fields; i++) |
b2e37d27 | 127 | ctx->fields[i].record(ctx->fields[i].priv, bufctx->probe_ctx, bufctx, chan); |
3d1fc7fd MD |
128 | } |
129 | ||
130 | /* | |
131 | * record_header_size - Calculate the header size and padding necessary. | |
132 | * @config: ring buffer instance configuration | |
133 | * @chan: channel | |
134 | * @offset: offset in the write buffer | |
135 | * @pre_header_padding: padding to add before the header (output) | |
136 | * @ctx: reservation context | |
137 | * | |
138 | * Returns the event header size (including padding). | |
139 | * | |
140 | * The payload must itself determine its own alignment from the biggest type it | |
141 | * contains. | |
142 | */ | |
143 | static __inline__ | |
2208d8b5 | 144 | size_t record_header_size( |
b5457df5 MD |
145 | const struct lttng_ust_ring_buffer_config *config __attribute__((unused)), |
146 | struct lttng_ust_ring_buffer_channel *chan, | |
2208d8b5 MJ |
147 | size_t offset, |
148 | size_t *pre_header_padding, | |
b5457df5 | 149 | struct lttng_ust_ring_buffer_ctx *ctx, |
2208d8b5 | 150 | struct lttng_client_ctx *client_ctx) |
3d1fc7fd | 151 | { |
e7bc0ef6 | 152 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); |
3d1fc7fd MD |
153 | size_t orig_offset = offset; |
154 | size_t padding; | |
155 | ||
e7bc0ef6 | 156 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd | 157 | case 1: /* compact */ |
b5457df5 | 158 | padding = lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd | 159 | offset += padding; |
8936b6c0 | 160 | if (!(ctx->priv->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
3d1fc7fd MD |
161 | offset += sizeof(uint32_t); /* id and timestamp */ |
162 | } else { | |
79dfbf42 MD |
163 | /* Minimum space taken by LTTNG_COMPACT_EVENT_BITS id */ |
164 | offset += (LTTNG_COMPACT_EVENT_BITS + CHAR_BIT - 1) / CHAR_BIT; | |
3d1fc7fd | 165 | /* Align extended struct on largest member */ |
b5457df5 | 166 | offset += lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 167 | offset += sizeof(uint32_t); /* id */ |
b5457df5 | 168 | offset += lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
169 | offset += sizeof(uint64_t); /* timestamp */ |
170 | } | |
171 | break; | |
172 | case 2: /* large */ | |
b5457df5 | 173 | padding = lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(uint16_t)); |
3d1fc7fd MD |
174 | offset += padding; |
175 | offset += sizeof(uint16_t); | |
8936b6c0 | 176 | if (!(ctx->priv->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
b5457df5 | 177 | offset += lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd MD |
178 | offset += sizeof(uint32_t); /* timestamp */ |
179 | } else { | |
180 | /* Align extended struct on largest member */ | |
b5457df5 | 181 | offset += lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 182 | offset += sizeof(uint32_t); /* id */ |
b5457df5 | 183 | offset += lttng_ust_ring_buffer_align(offset, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
184 | offset += sizeof(uint64_t); /* timestamp */ |
185 | } | |
186 | break; | |
187 | default: | |
9f3fdbc6 | 188 | padding = 0; |
3d1fc7fd MD |
189 | WARN_ON_ONCE(1); |
190 | } | |
0950190a | 191 | offset += ctx_get_aligned_size(offset, client_ctx->chan_ctx, |
2b7080aa | 192 | client_ctx->packet_context_len); |
a40b5b8c | 193 | offset += ctx_get_aligned_size(offset, client_ctx->event_ctx, |
2b7080aa | 194 | client_ctx->event_context_len); |
3d1fc7fd MD |
195 | *pre_header_padding = padding; |
196 | return offset - orig_offset; | |
197 | } | |
198 | ||
e4db8f98 | 199 | #include "common/ringbuffer/api.h" |
82b9bde8 | 200 | #include "lttng-rb-clients.h" |
3d1fc7fd | 201 | |
9f3fdbc6 | 202 | static |
b5457df5 MD |
203 | void lttng_write_event_header_slow(const struct lttng_ust_ring_buffer_config *config, |
204 | struct lttng_ust_ring_buffer_ctx *ctx, | |
0950190a | 205 | struct lttng_client_ctx *client_ctx, |
3d1fc7fd MD |
206 | uint32_t event_id); |
207 | ||
208 | /* | |
7dd08bec | 209 | * lttng_write_event_header |
3d1fc7fd MD |
210 | * |
211 | * Writes the event header to the offset (already aligned on 32-bits). | |
212 | * | |
213 | * @config: ring buffer instance configuration | |
214 | * @ctx: reservation context | |
215 | * @event_id: event ID | |
216 | */ | |
217 | static __inline__ | |
b5457df5 MD |
218 | void lttng_write_event_header(const struct lttng_ust_ring_buffer_config *config, |
219 | struct lttng_ust_ring_buffer_ctx *ctx, | |
0950190a | 220 | struct lttng_client_ctx *client_ctx, |
3d1fc7fd MD |
221 | uint32_t event_id) |
222 | { | |
8936b6c0 | 223 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->priv->chan); |
3d1fc7fd | 224 | |
8936b6c0 | 225 | if (caa_unlikely(ctx->priv->rflags)) |
3d1fc7fd MD |
226 | goto slow_path; |
227 | ||
e7bc0ef6 | 228 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd MD |
229 | case 1: /* compact */ |
230 | { | |
231 | uint32_t id_time = 0; | |
232 | ||
79dfbf42 MD |
233 | bt_bitfield_write(&id_time, uint32_t, |
234 | 0, | |
235 | LTTNG_COMPACT_EVENT_BITS, | |
236 | event_id); | |
237 | bt_bitfield_write(&id_time, uint32_t, | |
238 | LTTNG_COMPACT_EVENT_BITS, | |
239 | LTTNG_COMPACT_TSC_BITS, | |
8936b6c0 | 240 | ctx->priv->tsc); |
3d1fc7fd MD |
241 | lib_ring_buffer_write(config, ctx, &id_time, sizeof(id_time)); |
242 | break; | |
243 | } | |
244 | case 2: /* large */ | |
245 | { | |
8936b6c0 | 246 | uint32_t timestamp = (uint32_t) ctx->priv->tsc; |
3d1fc7fd MD |
247 | uint16_t id = event_id; |
248 | ||
249 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); | |
b5457df5 | 250 | lttng_ust_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd MD |
251 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
252 | break; | |
253 | } | |
254 | default: | |
255 | WARN_ON_ONCE(1); | |
256 | } | |
257 | ||
69e21fdf MD |
258 | ctx_record(ctx, lttng_chan, client_ctx->chan_ctx); |
259 | ctx_record(ctx, lttng_chan, client_ctx->event_ctx); | |
b5457df5 | 260 | lttng_ust_ring_buffer_align_ctx(ctx, ctx->largest_align); |
3d1fc7fd MD |
261 | |
262 | return; | |
263 | ||
264 | slow_path: | |
0950190a | 265 | lttng_write_event_header_slow(config, ctx, client_ctx, event_id); |
3d1fc7fd MD |
266 | } |
267 | ||
9f3fdbc6 | 268 | static |
b5457df5 MD |
269 | void lttng_write_event_header_slow(const struct lttng_ust_ring_buffer_config *config, |
270 | struct lttng_ust_ring_buffer_ctx *ctx, | |
0950190a | 271 | struct lttng_client_ctx *client_ctx, |
3d1fc7fd MD |
272 | uint32_t event_id) |
273 | { | |
b5457df5 | 274 | struct lttng_ust_ring_buffer_ctx_private *ctx_private = ctx->priv; |
8936b6c0 | 275 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->priv->chan); |
3d1fc7fd | 276 | |
e7bc0ef6 | 277 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd | 278 | case 1: /* compact */ |
8936b6c0 | 279 | if (!(ctx_private->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
3d1fc7fd MD |
280 | uint32_t id_time = 0; |
281 | ||
79dfbf42 MD |
282 | bt_bitfield_write(&id_time, uint32_t, |
283 | 0, | |
284 | LTTNG_COMPACT_EVENT_BITS, | |
285 | event_id); | |
286 | bt_bitfield_write(&id_time, uint32_t, | |
287 | LTTNG_COMPACT_EVENT_BITS, | |
288 | LTTNG_COMPACT_TSC_BITS, | |
8936b6c0 | 289 | ctx_private->tsc); |
3d1fc7fd MD |
290 | lib_ring_buffer_write(config, ctx, &id_time, sizeof(id_time)); |
291 | } else { | |
292 | uint8_t id = 0; | |
8936b6c0 | 293 | uint64_t timestamp = ctx_private->tsc; |
3d1fc7fd | 294 | |
79dfbf42 MD |
295 | bt_bitfield_write(&id, uint8_t, |
296 | 0, | |
297 | LTTNG_COMPACT_EVENT_BITS, | |
298 | 31); | |
3d1fc7fd MD |
299 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); |
300 | /* Align extended struct on largest member */ | |
b5457df5 | 301 | lttng_ust_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 302 | lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id)); |
b5457df5 | 303 | lttng_ust_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
304 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
305 | } | |
306 | break; | |
307 | case 2: /* large */ | |
308 | { | |
8936b6c0 MD |
309 | if (!(ctx_private->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { |
310 | uint32_t timestamp = (uint32_t) ctx_private->tsc; | |
3d1fc7fd MD |
311 | uint16_t id = event_id; |
312 | ||
313 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); | |
b5457df5 | 314 | lttng_ust_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint32_t)); |
3d1fc7fd MD |
315 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
316 | } else { | |
317 | uint16_t id = 65535; | |
8936b6c0 | 318 | uint64_t timestamp = ctx_private->tsc; |
3d1fc7fd MD |
319 | |
320 | lib_ring_buffer_write(config, ctx, &id, sizeof(id)); | |
321 | /* Align extended struct on largest member */ | |
b5457df5 | 322 | lttng_ust_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd | 323 | lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id)); |
b5457df5 | 324 | lttng_ust_ring_buffer_align_ctx(ctx, lttng_ust_rb_alignof(uint64_t)); |
3d1fc7fd MD |
325 | lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); |
326 | } | |
327 | break; | |
328 | } | |
329 | default: | |
330 | WARN_ON_ONCE(1); | |
331 | } | |
69e21fdf MD |
332 | ctx_record(ctx, lttng_chan, client_ctx->chan_ctx); |
333 | ctx_record(ctx, lttng_chan, client_ctx->event_ctx); | |
b5457df5 | 334 | lttng_ust_ring_buffer_align_ctx(ctx, ctx->largest_align); |
3d1fc7fd MD |
335 | } |
336 | ||
b5457df5 | 337 | static const struct lttng_ust_ring_buffer_config client_config; |
3d1fc7fd | 338 | |
b5457df5 | 339 | static uint64_t client_ring_buffer_clock_read(struct lttng_ust_ring_buffer_channel *chan) |
3d1fc7fd MD |
340 | { |
341 | return lib_ring_buffer_clock_read(chan); | |
342 | } | |
343 | ||
344 | static | |
b5457df5 MD |
345 | size_t client_record_header_size(const struct lttng_ust_ring_buffer_config *config, |
346 | struct lttng_ust_ring_buffer_channel *chan, | |
5198080d | 347 | size_t offset, |
3d1fc7fd | 348 | size_t *pre_header_padding, |
b5457df5 | 349 | struct lttng_ust_ring_buffer_ctx *ctx, |
e56bb47c | 350 | void *client_ctx) |
3d1fc7fd MD |
351 | { |
352 | return record_header_size(config, chan, offset, | |
e56bb47c | 353 | pre_header_padding, ctx, client_ctx); |
3d1fc7fd MD |
354 | } |
355 | ||
356 | /** | |
357 | * client_packet_header_size - called on buffer-switch to a new sub-buffer | |
358 | * | |
359 | * Return header size without padding after the structure. Don't use packed | |
360 | * structure because gcc generates inefficient code on some architectures | |
361 | * (powerpc, mips..) | |
362 | */ | |
363 | static size_t client_packet_header_size(void) | |
364 | { | |
365 | return offsetof(struct packet_header, ctx.header_end); | |
366 | } | |
367 | ||
b5457df5 | 368 | static void client_buffer_begin(struct lttng_ust_ring_buffer *buf, uint64_t tsc, |
1d498196 | 369 | unsigned int subbuf_idx, |
38fae1d3 | 370 | struct lttng_ust_shm_handle *handle) |
3d1fc7fd | 371 | { |
b5457df5 | 372 | struct lttng_ust_ring_buffer_channel *chan = shmp(handle, buf->backend.chan); |
3d1fc7fd MD |
373 | struct packet_header *header = |
374 | (struct packet_header *) | |
375 | lib_ring_buffer_offset_address(&buf->backend, | |
1d498196 MD |
376 | subbuf_idx * chan->backend.subbuf_size, |
377 | handle); | |
e7bc0ef6 | 378 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); |
1ff31389 | 379 | uint64_t cnt = shmp_index(handle, buf->backend.buf_cnt, subbuf_idx)->seq_cnt; |
3d1fc7fd | 380 | |
34daae3e MD |
381 | assert(header); |
382 | if (!header) | |
383 | return; | |
3d1fc7fd | 384 | header->magic = CTF_MAGIC_NUMBER; |
e7bc0ef6 MD |
385 | memcpy(header->uuid, lttng_chan->priv->uuid, sizeof(lttng_chan->priv->uuid)); |
386 | header->stream_id = lttng_chan->priv->id; | |
2d94adc5 | 387 | header->stream_instance_id = buf->backend.cpu; |
3d1fc7fd MD |
388 | header->ctx.timestamp_begin = tsc; |
389 | header->ctx.timestamp_end = 0; | |
0c00a107 MD |
390 | header->ctx.content_size = ~0ULL; /* for debugging */ |
391 | header->ctx.packet_size = ~0ULL; | |
1ff31389 | 392 | header->ctx.packet_seq_num = chan->backend.num_subbuf * cnt + subbuf_idx; |
3d1fc7fd | 393 | header->ctx.events_discarded = 0; |
3d1fc7fd MD |
394 | header->ctx.cpu_id = buf->backend.cpu; |
395 | } | |
396 | ||
397 | /* | |
398 | * offset is assumed to never be 0 here : never deliver a completely empty | |
399 | * subbuffer. data_size is between 1 and subbuf_size. | |
400 | */ | |
b5457df5 | 401 | static void client_buffer_end(struct lttng_ust_ring_buffer *buf, uint64_t tsc, |
1d498196 | 402 | unsigned int subbuf_idx, unsigned long data_size, |
38fae1d3 | 403 | struct lttng_ust_shm_handle *handle) |
3d1fc7fd | 404 | { |
b5457df5 | 405 | struct lttng_ust_ring_buffer_channel *chan = shmp(handle, buf->backend.chan); |
3d1fc7fd MD |
406 | struct packet_header *header = |
407 | (struct packet_header *) | |
408 | lib_ring_buffer_offset_address(&buf->backend, | |
1d498196 MD |
409 | subbuf_idx * chan->backend.subbuf_size, |
410 | handle); | |
3d1fc7fd MD |
411 | unsigned long records_lost = 0; |
412 | ||
34daae3e MD |
413 | assert(header); |
414 | if (!header) | |
415 | return; | |
3d1fc7fd | 416 | header->ctx.timestamp_end = tsc; |
b1830883 MD |
417 | header->ctx.content_size = |
418 | (uint64_t) data_size * CHAR_BIT; /* in bits */ | |
419 | header->ctx.packet_size = | |
b72687b8 | 420 | (uint64_t) LTTNG_UST_PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */ |
04489ab4 MD |
421 | |
422 | records_lost += lib_ring_buffer_get_records_lost_full(&client_config, buf); | |
3d1fc7fd MD |
423 | records_lost += lib_ring_buffer_get_records_lost_wrap(&client_config, buf); |
424 | records_lost += lib_ring_buffer_get_records_lost_big(&client_config, buf); | |
425 | header->ctx.events_discarded = records_lost; | |
426 | } | |
427 | ||
2208d8b5 | 428 | static int client_buffer_create( |
b5457df5 | 429 | struct lttng_ust_ring_buffer *buf __attribute__((unused)), |
2208d8b5 MJ |
430 | void *priv __attribute__((unused)), |
431 | int cpu __attribute__((unused)), | |
432 | const char *name __attribute__((unused)), | |
433 | struct lttng_ust_shm_handle *handle __attribute__((unused))) | |
3d1fc7fd MD |
434 | { |
435 | return 0; | |
436 | } | |
437 | ||
2208d8b5 | 438 | static void client_buffer_finalize( |
b5457df5 | 439 | struct lttng_ust_ring_buffer *buf __attribute__((unused)), |
2208d8b5 MJ |
440 | void *priv __attribute__((unused)), |
441 | int cpu __attribute__((unused)), | |
442 | struct lttng_ust_shm_handle *handle __attribute__((unused))) | |
3d1fc7fd MD |
443 | { |
444 | } | |
445 | ||
2208d8b5 | 446 | static void client_content_size_field( |
b5457df5 | 447 | const struct lttng_ust_ring_buffer_config *config __attribute__((unused)), |
2208d8b5 | 448 | size_t *offset, size_t *length) |
a9ff648c MD |
449 | { |
450 | *offset = offsetof(struct packet_header, ctx.content_size); | |
451 | *length = sizeof(((struct packet_header *) NULL)->ctx.content_size); | |
452 | } | |
453 | ||
2208d8b5 | 454 | static void client_packet_size_field( |
b5457df5 | 455 | const struct lttng_ust_ring_buffer_config *config __attribute__((unused)), |
2208d8b5 | 456 | size_t *offset, size_t *length) |
a9ff648c MD |
457 | { |
458 | *offset = offsetof(struct packet_header, ctx.packet_size); | |
459 | *length = sizeof(((struct packet_header *) NULL)->ctx.packet_size); | |
460 | } | |
461 | ||
b5457df5 | 462 | static struct packet_header *client_packet_header(struct lttng_ust_ring_buffer *buf, |
b2f3252a JD |
463 | struct lttng_ust_shm_handle *handle) |
464 | { | |
c4d6bd10 | 465 | return lib_ring_buffer_read_offset_address(&buf->backend, 0, handle); |
b2f3252a JD |
466 | } |
467 | ||
b5457df5 MD |
468 | static int client_timestamp_begin(struct lttng_ust_ring_buffer *buf, |
469 | struct lttng_ust_ring_buffer_channel *chan, | |
b2f3252a JD |
470 | uint64_t *timestamp_begin) |
471 | { | |
07539b34 | 472 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
473 | struct packet_header *header; |
474 | ||
475 | header = client_packet_header(buf, handle); | |
34daae3e MD |
476 | if (!header) |
477 | return -1; | |
b2f3252a JD |
478 | *timestamp_begin = header->ctx.timestamp_begin; |
479 | return 0; | |
480 | } | |
481 | ||
b5457df5 MD |
482 | static int client_timestamp_end(struct lttng_ust_ring_buffer *buf, |
483 | struct lttng_ust_ring_buffer_channel *chan, | |
b2f3252a JD |
484 | uint64_t *timestamp_end) |
485 | { | |
07539b34 | 486 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
487 | struct packet_header *header; |
488 | ||
489 | header = client_packet_header(buf, handle); | |
34daae3e MD |
490 | if (!header) |
491 | return -1; | |
b2f3252a JD |
492 | *timestamp_end = header->ctx.timestamp_end; |
493 | return 0; | |
494 | } | |
495 | ||
b5457df5 MD |
496 | static int client_events_discarded(struct lttng_ust_ring_buffer *buf, |
497 | struct lttng_ust_ring_buffer_channel *chan, | |
b2f3252a JD |
498 | uint64_t *events_discarded) |
499 | { | |
07539b34 | 500 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
501 | struct packet_header *header; |
502 | ||
503 | header = client_packet_header(buf, handle); | |
34daae3e MD |
504 | if (!header) |
505 | return -1; | |
b2f3252a JD |
506 | *events_discarded = header->ctx.events_discarded; |
507 | return 0; | |
508 | } | |
509 | ||
b5457df5 MD |
510 | static int client_content_size(struct lttng_ust_ring_buffer *buf, |
511 | struct lttng_ust_ring_buffer_channel *chan, | |
b2f3252a JD |
512 | uint64_t *content_size) |
513 | { | |
07539b34 | 514 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
515 | struct packet_header *header; |
516 | ||
517 | header = client_packet_header(buf, handle); | |
34daae3e MD |
518 | if (!header) |
519 | return -1; | |
b2f3252a JD |
520 | *content_size = header->ctx.content_size; |
521 | return 0; | |
522 | } | |
523 | ||
b5457df5 MD |
524 | static int client_packet_size(struct lttng_ust_ring_buffer *buf, |
525 | struct lttng_ust_ring_buffer_channel *chan, | |
b2f3252a JD |
526 | uint64_t *packet_size) |
527 | { | |
07539b34 | 528 | struct lttng_ust_shm_handle *handle = chan->handle; |
b2f3252a JD |
529 | struct packet_header *header; |
530 | ||
531 | header = client_packet_header(buf, handle); | |
34daae3e MD |
532 | if (!header) |
533 | return -1; | |
b2f3252a JD |
534 | *packet_size = header->ctx.packet_size; |
535 | return 0; | |
536 | } | |
537 | ||
b5457df5 MD |
538 | static int client_stream_id(struct lttng_ust_ring_buffer *buf __attribute__((unused)), |
539 | struct lttng_ust_ring_buffer_channel *chan, | |
b2f3252a JD |
540 | uint64_t *stream_id) |
541 | { | |
e7bc0ef6 | 542 | struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); |
db95cf8b | 543 | |
e7bc0ef6 | 544 | *stream_id = lttng_chan->priv->id; |
b2f3252a | 545 | |
b2f3252a JD |
546 | return 0; |
547 | } | |
548 | ||
2208d8b5 | 549 | static int client_current_timestamp( |
b5457df5 MD |
550 | struct lttng_ust_ring_buffer *buf __attribute__((unused)), |
551 | struct lttng_ust_ring_buffer_channel *chan, | |
fca361e8 JD |
552 | uint64_t *ts) |
553 | { | |
fca361e8 JD |
554 | *ts = client_ring_buffer_clock_read(chan); |
555 | ||
556 | return 0; | |
557 | } | |
558 | ||
b5457df5 MD |
559 | static int client_sequence_number(struct lttng_ust_ring_buffer *buf, |
560 | struct lttng_ust_ring_buffer_channel *chan, | |
1ff31389 JD |
561 | uint64_t *seq) |
562 | { | |
07539b34 | 563 | struct lttng_ust_shm_handle *handle = chan->handle; |
1ff31389 JD |
564 | struct packet_header *header; |
565 | ||
566 | header = client_packet_header(buf, handle); | |
3e1db88d MD |
567 | if (!header) |
568 | return -1; | |
1ff31389 JD |
569 | *seq = header->ctx.packet_seq_num; |
570 | return 0; | |
571 | } | |
572 | ||
b5457df5 MD |
573 | static int client_instance_id(struct lttng_ust_ring_buffer *buf, |
574 | struct lttng_ust_ring_buffer_channel *chan __attribute__((unused)), | |
45a00b05 JD |
575 | uint64_t *id) |
576 | { | |
db95cf8b | 577 | *id = buf->backend.cpu; |
45a00b05 | 578 | |
45a00b05 JD |
579 | return 0; |
580 | } | |
581 | ||
82b9bde8 JD |
582 | static const |
583 | struct lttng_ust_client_lib_ring_buffer_client_cb client_cb = { | |
584 | .parent = { | |
585 | .ring_buffer_clock_read = client_ring_buffer_clock_read, | |
586 | .record_header_size = client_record_header_size, | |
587 | .subbuffer_header_size = client_packet_header_size, | |
588 | .buffer_begin = client_buffer_begin, | |
589 | .buffer_end = client_buffer_end, | |
590 | .buffer_create = client_buffer_create, | |
591 | .buffer_finalize = client_buffer_finalize, | |
a9ff648c MD |
592 | .content_size_field = client_content_size_field, |
593 | .packet_size_field = client_packet_size_field, | |
82b9bde8 | 594 | }, |
b2f3252a JD |
595 | .timestamp_begin = client_timestamp_begin, |
596 | .timestamp_end = client_timestamp_end, | |
597 | .events_discarded = client_events_discarded, | |
598 | .content_size = client_content_size, | |
599 | .packet_size = client_packet_size, | |
600 | .stream_id = client_stream_id, | |
fca361e8 | 601 | .current_timestamp = client_current_timestamp, |
1ff31389 | 602 | .sequence_number = client_sequence_number, |
45a00b05 | 603 | .instance_id = client_instance_id, |
82b9bde8 JD |
604 | }; |
605 | ||
b5457df5 | 606 | static const struct lttng_ust_ring_buffer_config client_config = { |
3d1fc7fd MD |
607 | .cb.ring_buffer_clock_read = client_ring_buffer_clock_read, |
608 | .cb.record_header_size = client_record_header_size, | |
609 | .cb.subbuffer_header_size = client_packet_header_size, | |
610 | .cb.buffer_begin = client_buffer_begin, | |
611 | .cb.buffer_end = client_buffer_end, | |
612 | .cb.buffer_create = client_buffer_create, | |
613 | .cb.buffer_finalize = client_buffer_finalize, | |
a9ff648c MD |
614 | .cb.content_size_field = client_content_size_field, |
615 | .cb.packet_size_field = client_packet_size_field, | |
3d1fc7fd | 616 | |
79dfbf42 | 617 | .tsc_bits = LTTNG_COMPACT_TSC_BITS, |
3d1fc7fd | 618 | .alloc = RING_BUFFER_ALLOC_PER_CPU, |
5d61a504 | 619 | .sync = RING_BUFFER_SYNC_GLOBAL, |
3d1fc7fd MD |
620 | .mode = RING_BUFFER_MODE_TEMPLATE, |
621 | .backend = RING_BUFFER_PAGE, | |
5d61a504 | 622 | .output = RING_BUFFER_MMAP, |
3d1fc7fd | 623 | .oops = RING_BUFFER_OOPS_CONSISTENCY, |
5d61a504 | 624 | .ipi = RING_BUFFER_NO_IPI_BARRIER, |
34a91bdb | 625 | .wakeup = LTTNG_CLIENT_WAKEUP, |
c1fca457 | 626 | .client_type = LTTNG_CLIENT_TYPE, |
82b9bde8 JD |
627 | |
628 | .cb_ptr = &client_cb.parent, | |
3d1fc7fd MD |
629 | }; |
630 | ||
631 | static | |
e7bc0ef6 | 632 | struct lttng_ust_channel_buffer *_channel_create(const char *name, |
a3f61e7f | 633 | void *buf_addr, |
3d1fc7fd MD |
634 | size_t subbuf_size, size_t num_subbuf, |
635 | unsigned int switch_timer_interval, | |
193183fb | 636 | unsigned int read_timer_interval, |
6ca18e66 | 637 | unsigned char *uuid, |
a9ff648c | 638 | uint32_t chan_id, |
b2c5f61a MD |
639 | const int *stream_fds, int nr_stream_fds, |
640 | int64_t blocking_timeout) | |
3d1fc7fd | 641 | { |
f0fde1c3 | 642 | struct lttng_ust_abi_channel_config chan_priv_init; |
a3f61e7f | 643 | struct lttng_ust_shm_handle *handle; |
e7bc0ef6 | 644 | struct lttng_ust_channel_buffer *lttng_chan_buf; |
f0fde1c3 | 645 | |
e7bc0ef6 MD |
646 | lttng_chan_buf = lttng_ust_alloc_channel_buffer(); |
647 | if (!lttng_chan_buf) | |
f0fde1c3 | 648 | return NULL; |
e7bc0ef6 MD |
649 | memcpy(lttng_chan_buf->priv->uuid, uuid, LTTNG_UST_UUID_LEN); |
650 | lttng_chan_buf->priv->id = chan_id; | |
a3f61e7f | 651 | |
74d81a6c MD |
652 | memset(&chan_priv_init, 0, sizeof(chan_priv_init)); |
653 | memcpy(chan_priv_init.uuid, uuid, LTTNG_UST_UUID_LEN); | |
6ca18e66 | 654 | chan_priv_init.id = chan_id; |
f0fde1c3 | 655 | |
a3f61e7f | 656 | handle = channel_create(&client_config, name, |
f0fde1c3 MD |
657 | __alignof__(struct lttng_ust_abi_channel_config), |
658 | sizeof(struct lttng_ust_abi_channel_config), | |
74d81a6c | 659 | &chan_priv_init, |
e7bc0ef6 | 660 | lttng_chan_buf, buf_addr, subbuf_size, num_subbuf, |
a9ff648c | 661 | switch_timer_interval, read_timer_interval, |
b2c5f61a | 662 | stream_fds, nr_stream_fds, blocking_timeout); |
a3f61e7f | 663 | if (!handle) |
f0fde1c3 | 664 | goto error; |
07539b34 | 665 | lttng_chan_buf->priv->rb_chan = shmp(handle, handle->chan); |
e7bc0ef6 | 666 | return lttng_chan_buf; |
f0fde1c3 MD |
667 | |
668 | error: | |
e7bc0ef6 | 669 | lttng_ust_free_channel_common(lttng_chan_buf->parent); |
f0fde1c3 | 670 | return NULL; |
3d1fc7fd MD |
671 | } |
672 | ||
673 | static | |
e7bc0ef6 | 674 | void lttng_channel_destroy(struct lttng_ust_channel_buffer *lttng_chan_buf) |
3d1fc7fd | 675 | { |
07539b34 | 676 | channel_destroy(lttng_chan_buf->priv->rb_chan, lttng_chan_buf->priv->rb_chan->handle, 1); |
e7bc0ef6 | 677 | lttng_ust_free_channel_common(lttng_chan_buf->parent); |
3d1fc7fd MD |
678 | } |
679 | ||
680 | static | |
b5457df5 | 681 | int lttng_event_reserve(struct lttng_ust_ring_buffer_ctx *ctx) |
3d1fc7fd | 682 | { |
8936b6c0 | 683 | struct lttng_ust_event_recorder *event_recorder = ctx->client_priv; |
07539b34 | 684 | struct lttng_ust_channel_buffer *lttng_chan = event_recorder->chan; |
e56bb47c | 685 | struct lttng_client_ctx client_ctx; |
8936b6c0 | 686 | int ret, nesting; |
b5457df5 | 687 | struct lttng_ust_ring_buffer_ctx_private *private_ctx; |
8936b6c0 | 688 | uint32_t event_id; |
3d1fc7fd | 689 | |
8936b6c0 | 690 | event_id = event_recorder->priv->id; |
0950190a | 691 | client_ctx.chan_ctx = lttng_ust_rcu_dereference(lttng_chan->priv->ctx); |
a40b5b8c | 692 | client_ctx.event_ctx = lttng_ust_rcu_dereference(event_recorder->priv->ctx); |
e56bb47c | 693 | /* Compute internal size of context structures. */ |
b2e37d27 MD |
694 | ctx_get_struct_size(ctx, client_ctx.chan_ctx, &client_ctx.packet_context_len); |
695 | ctx_get_struct_size(ctx, client_ctx.event_ctx, &client_ctx.event_context_len); | |
e56bb47c | 696 | |
8936b6c0 MD |
697 | nesting = lib_ring_buffer_nesting_inc(&client_config); |
698 | if (nesting < 0) | |
3d1fc7fd | 699 | return -EPERM; |
3d1fc7fd | 700 | |
f37bd904 | 701 | private_ctx = &URCU_TLS(private_ctx_stack)[nesting]; |
8936b6c0 MD |
702 | memset(private_ctx, 0, sizeof(*private_ctx)); |
703 | private_ctx->pub = ctx; | |
704 | private_ctx->chan = lttng_chan->priv->rb_chan; | |
705 | ||
706 | ctx->priv = private_ctx; | |
707 | ||
e7bc0ef6 | 708 | switch (lttng_chan->priv->header_type) { |
3d1fc7fd MD |
709 | case 1: /* compact */ |
710 | if (event_id > 30) | |
8936b6c0 | 711 | private_ctx->rflags |= LTTNG_RFLAG_EXTENDED; |
3d1fc7fd MD |
712 | break; |
713 | case 2: /* large */ | |
714 | if (event_id > 65534) | |
8936b6c0 | 715 | private_ctx->rflags |= LTTNG_RFLAG_EXTENDED; |
3d1fc7fd MD |
716 | break; |
717 | default: | |
718 | WARN_ON_ONCE(1); | |
719 | } | |
720 | ||
e56bb47c | 721 | ret = lib_ring_buffer_reserve(&client_config, ctx, &client_ctx); |
630d6836 | 722 | if (caa_unlikely(ret)) |
3d1fc7fd | 723 | goto put; |
2b7080aa | 724 | if (lib_ring_buffer_backend_get_pages(&client_config, ctx, |
8936b6c0 | 725 | &private_ctx->backend_pages)) { |
2b7080aa MD |
726 | ret = -EPERM; |
727 | goto put; | |
a3492932 | 728 | } |
0950190a | 729 | lttng_write_event_header(&client_config, ctx, &client_ctx, event_id); |
3d1fc7fd MD |
730 | return 0; |
731 | put: | |
7489fcb4 | 732 | lib_ring_buffer_nesting_dec(&client_config); |
3d1fc7fd MD |
733 | return ret; |
734 | } | |
735 | ||
736 | static | |
b5457df5 | 737 | void lttng_event_commit(struct lttng_ust_ring_buffer_ctx *ctx) |
3d1fc7fd MD |
738 | { |
739 | lib_ring_buffer_commit(&client_config, ctx); | |
7489fcb4 | 740 | lib_ring_buffer_nesting_dec(&client_config); |
3d1fc7fd MD |
741 | } |
742 | ||
743 | static | |
b5457df5 | 744 | void lttng_event_write(struct lttng_ust_ring_buffer_ctx *ctx, |
8936b6c0 | 745 | const void *src, size_t len, size_t alignment) |
3d1fc7fd | 746 | { |
b5457df5 | 747 | lttng_ust_ring_buffer_align_ctx(ctx, alignment); |
3d1fc7fd MD |
748 | lib_ring_buffer_write(&client_config, ctx, src, len); |
749 | } | |
750 | ||
a44c74d9 | 751 | static |
b5457df5 | 752 | void lttng_event_strcpy(struct lttng_ust_ring_buffer_ctx *ctx, |
8936b6c0 | 753 | const char *src, size_t len) |
a44c74d9 MD |
754 | { |
755 | lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#'); | |
756 | } | |
757 | ||
27927814 | 758 | static |
b5457df5 | 759 | void lttng_event_pstrcpy_pad(struct lttng_ust_ring_buffer_ctx *ctx, |
8936b6c0 | 760 | const char *src, size_t len) |
27927814 | 761 | { |
879f9b0a | 762 | lib_ring_buffer_pstrcpy(&client_config, ctx, src, len, '\0'); |
27927814 MD |
763 | } |
764 | ||
3d1fc7fd | 765 | static |
07539b34 | 766 | int lttng_is_finalized(struct lttng_ust_channel_buffer *chan) |
3d1fc7fd | 767 | { |
b5457df5 | 768 | struct lttng_ust_ring_buffer_channel *rb_chan = chan->priv->rb_chan; |
3d1fc7fd | 769 | |
07539b34 | 770 | return lib_ring_buffer_channel_is_finalized(rb_chan); |
3d1fc7fd MD |
771 | } |
772 | ||
773 | static | |
07539b34 | 774 | int lttng_is_disabled(struct lttng_ust_channel_buffer *chan) |
3d1fc7fd | 775 | { |
b5457df5 | 776 | struct lttng_ust_ring_buffer_channel *rb_chan = chan->priv->rb_chan; |
3d1fc7fd | 777 | |
07539b34 | 778 | return lib_ring_buffer_channel_is_disabled(rb_chan); |
3d1fc7fd MD |
779 | } |
780 | ||
43861eab | 781 | static |
07539b34 | 782 | int lttng_flush_buffer(struct lttng_ust_channel_buffer *chan) |
43861eab | 783 | { |
b5457df5 MD |
784 | struct lttng_ust_ring_buffer_channel *rb_chan = chan->priv->rb_chan; |
785 | struct lttng_ust_ring_buffer *buf; | |
43861eab MD |
786 | int cpu; |
787 | ||
07539b34 | 788 | for_each_channel_cpu(cpu, rb_chan) { |
74d81a6c MD |
789 | int shm_fd, wait_fd, wakeup_fd; |
790 | uint64_t memory_map_size; | |
43861eab | 791 | |
07539b34 MD |
792 | buf = channel_get_ring_buffer(&client_config, rb_chan, |
793 | cpu, rb_chan->handle, &shm_fd, &wait_fd, | |
74d81a6c | 794 | &wakeup_fd, &memory_map_size); |
43861eab | 795 | lib_ring_buffer_switch(&client_config, buf, |
07539b34 | 796 | SWITCH_ACTIVE, rb_chan->handle); |
43861eab MD |
797 | } |
798 | return 0; | |
799 | } | |
800 | ||
7dd08bec | 801 | static struct lttng_transport lttng_relay_transport = { |
818173b9 | 802 | .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap", |
3d1fc7fd | 803 | .ops = { |
14b6f891 | 804 | .struct_size = sizeof(struct lttng_ust_channel_buffer_ops), |
5defa774 | 805 | .priv = LTTNG_UST_COMPOUND_LITERAL(struct lttng_ust_channel_buffer_ops_private, { |
a880bae5 MD |
806 | .pub = <tng_relay_transport.ops, |
807 | .channel_create = _channel_create, | |
808 | .channel_destroy = lttng_channel_destroy, | |
809 | .packet_avail_size = NULL, /* Would be racy anyway */ | |
810 | .is_finalized = lttng_is_finalized, | |
811 | .is_disabled = lttng_is_disabled, | |
812 | .flush_buffer = lttng_flush_buffer, | |
813 | }), | |
7dd08bec MD |
814 | .event_reserve = lttng_event_reserve, |
815 | .event_commit = lttng_event_commit, | |
816 | .event_write = lttng_event_write, | |
a44c74d9 | 817 | .event_strcpy = lttng_event_strcpy, |
879f9b0a | 818 | .event_pstrcpy_pad = lttng_event_pstrcpy_pad, |
3d1fc7fd | 819 | }, |
74d81a6c | 820 | .client_config = &client_config, |
3d1fc7fd MD |
821 | }; |
822 | ||
edaa1431 | 823 | void RING_BUFFER_MODE_TEMPLATE_INIT(void) |
3d1fc7fd | 824 | { |
34a91bdb MD |
825 | DBG("LTT : ltt ring buffer client \"%s\" init\n", |
826 | "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap"); | |
7dd08bec | 827 | lttng_transport_register(<tng_relay_transport); |
3d1fc7fd MD |
828 | } |
829 | ||
edaa1431 | 830 | void RING_BUFFER_MODE_TEMPLATE_EXIT(void) |
3d1fc7fd | 831 | { |
34a91bdb MD |
832 | DBG("LTT : ltt ring buffer client \"%s\" exit\n", |
833 | "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap"); | |
7dd08bec | 834 | lttng_transport_unregister(<tng_relay_transport); |
3d1fc7fd | 835 | } |