X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-ring-buffer-metadata-client.h;h=f4d1362a6e9b95303349483a574842815a96ed77;hb=74c3f8e27f5b750b71136ce1737972c28f288540;hp=5c82187d4311d9f496b188d6e54c735dbbbf86f0;hpb=34a91bdb42a2a3b01b687ab5e1ba7638401e6dfc;p=lttng-ust.git diff --git a/liblttng-ust/lttng-ring-buffer-metadata-client.h b/liblttng-ust/lttng-ring-buffer-metadata-client.h index 5c82187d..f4d1362a 100644 --- a/liblttng-ust/lttng-ring-buffer-metadata-client.h +++ b/liblttng-ust/lttng-ring-buffer-metadata-client.h @@ -1,30 +1,21 @@ /* - * lttng-ring-buffer-client.h - * - * LTTng lib ring buffer client template. + * SPDX-License-Identifier: LGPL-2.1-only * * Copyright (C) 2010-2012 Mathieu Desnoyers * - * This library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; only - * version 2.1 of the License. - * - * This library is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with this library; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * LTTng lib ring buffer client template. */ +#include +#include #include -#include -#include "lttng/bitfield.h" + +#include +#include "ust-bitfield.h" +#include "ust-compat.h" #include "lttng-tracer.h" #include "../libringbuffer/frontend_types.h" +#include struct metadata_packet_header { uint32_t magic; /* 0x75D11D57 */ @@ -46,32 +37,40 @@ struct metadata_record_header { static const struct lttng_ust_lib_ring_buffer_config client_config; -static inline uint64_t lib_ring_buffer_clock_read(struct channel *chan) +/* No nested use supported for metadata ring buffer. */ +static DEFINE_URCU_TLS(struct lttng_ust_lib_ring_buffer_ctx_private, private_ctx); + +static inline uint64_t lib_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan) { return 0; } static inline -unsigned char record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, - struct channel *chan, size_t offset, +size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, + struct lttng_ust_lib_ring_buffer_channel *chan, + size_t offset, size_t *pre_header_padding, - struct lttng_ust_lib_ring_buffer_ctx *ctx) + struct lttng_ust_lib_ring_buffer_ctx *ctx, + void *client_ctx) { return 0; } #include "../libringbuffer/api.h" +#include "lttng-rb-clients.h" -static uint64_t client_ring_buffer_clock_read(struct channel *chan) +static uint64_t client_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan) { return 0; } static size_t client_record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, - struct channel *chan, size_t offset, + struct lttng_ust_lib_ring_buffer_channel *chan, + size_t offset, size_t *pre_header_padding, - struct lttng_ust_lib_ring_buffer_ctx *ctx) + struct lttng_ust_lib_ring_buffer_ctx *ctx, + void *client_ctx) { return 0; } @@ -92,16 +91,19 @@ static void client_buffer_begin(struct lttng_ust_lib_ring_buffer *buf, uint64_t unsigned int subbuf_idx, struct lttng_ust_shm_handle *handle) { - struct channel *chan = shmp(handle, buf->backend.chan); + struct lttng_ust_lib_ring_buffer_channel *chan = shmp(handle, buf->backend.chan); struct metadata_packet_header *header = (struct metadata_packet_header *) lib_ring_buffer_offset_address(&buf->backend, subbuf_idx * chan->backend.subbuf_size, handle); - struct lttng_channel *lttng_chan = channel_get_private(chan); + struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); + assert(header); + if (!header) + return; header->magic = TSDL_MAGIC_NUMBER; - memcpy(header->uuid, lttng_chan->uuid, sizeof(lttng_chan->uuid)); + memcpy(header->uuid, lttng_chan->priv->uuid, sizeof(lttng_chan->priv->uuid)); header->checksum = 0; /* 0 if unused */ header->content_size = 0xFFFFFFFF; /* in bits, for debugging */ header->packet_size = 0xFFFFFFFF; /* in bits, for debugging */ @@ -120,7 +122,7 @@ static void client_buffer_end(struct lttng_ust_lib_ring_buffer *buf, uint64_t ts unsigned int subbuf_idx, unsigned long data_size, struct lttng_ust_shm_handle *handle) { - struct channel *chan = shmp(handle, buf->backend.chan); + struct lttng_ust_lib_ring_buffer_channel *chan = shmp(handle, buf->backend.chan); struct metadata_packet_header *header = (struct metadata_packet_header *) lib_ring_buffer_offset_address(&buf->backend, @@ -128,8 +130,11 @@ static void client_buffer_end(struct lttng_ust_lib_ring_buffer *buf, uint64_t ts handle); unsigned long records_lost = 0; + assert(header); + if (!header) + return; header->content_size = data_size * CHAR_BIT; /* in bits */ - header->packet_size = PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */ + header->packet_size = LTTNG_UST_PAGE_ALIGN(data_size) * CHAR_BIT; /* in bits */ /* * We do not care about the records lost count, because the metadata * channel waits and retry. @@ -153,6 +158,19 @@ static void client_buffer_finalize(struct lttng_ust_lib_ring_buffer *buf, { } +static const +struct lttng_ust_client_lib_ring_buffer_client_cb client_cb = { + .parent = { + .ring_buffer_clock_read = client_ring_buffer_clock_read, + .record_header_size = client_record_header_size, + .subbuffer_header_size = client_packet_header_size, + .buffer_begin = client_buffer_begin, + .buffer_end = client_buffer_end, + .buffer_create = client_buffer_create, + .buffer_finalize = client_buffer_finalize, + }, +}; + static const struct lttng_ust_lib_ring_buffer_config client_config = { .cb.ring_buffer_clock_read = client_ring_buffer_clock_read, .cb.record_header_size = client_record_header_size, @@ -172,48 +190,75 @@ static const struct lttng_ust_lib_ring_buffer_config client_config = { .ipi = RING_BUFFER_NO_IPI_BARRIER, .wakeup = RING_BUFFER_WAKEUP_BY_WRITER, .client_type = LTTNG_CLIENT_TYPE, -}; -const struct lttng_ust_lib_ring_buffer_client_cb *LTTNG_CLIENT_CALLBACKS = &client_config.cb; + .cb_ptr = &client_cb.parent, +}; static -struct lttng_channel *_channel_create(const char *name, +struct lttng_ust_channel_buffer *_channel_create(const char *name, void *buf_addr, size_t subbuf_size, size_t num_subbuf, unsigned int switch_timer_interval, unsigned int read_timer_interval, - unsigned char *uuid) + unsigned char *uuid, + uint32_t chan_id, + const int *stream_fds, int nr_stream_fds, + int64_t blocking_timeout) { - struct lttng_channel chan_priv_init; + struct lttng_ust_abi_channel_config chan_priv_init; struct lttng_ust_shm_handle *handle; - struct lttng_channel *lttng_chan; - void *priv; + struct lttng_ust_channel_buffer *lttng_chan_buf; + + lttng_chan_buf = lttng_ust_alloc_channel_buffer(); + if (!lttng_chan_buf) + return NULL; + memcpy(lttng_chan_buf->priv->uuid, uuid, LTTNG_UST_UUID_LEN); + lttng_chan_buf->priv->id = chan_id; memset(&chan_priv_init, 0, sizeof(chan_priv_init)); memcpy(chan_priv_init.uuid, uuid, LTTNG_UST_UUID_LEN); + chan_priv_init.id = chan_id; + handle = channel_create(&client_config, name, - &priv, __alignof__(*lttng_chan), sizeof(*lttng_chan), + __alignof__(struct lttng_ust_channel_buffer), + sizeof(struct lttng_ust_channel_buffer), &chan_priv_init, - buf_addr, subbuf_size, num_subbuf, - switch_timer_interval, read_timer_interval); + lttng_chan_buf, buf_addr, subbuf_size, num_subbuf, + switch_timer_interval, read_timer_interval, + stream_fds, nr_stream_fds, blocking_timeout); if (!handle) - return NULL; - lttng_chan = priv; - lttng_chan->handle = handle; - lttng_chan->chan = shmp(handle, handle->chan); - return lttng_chan; + goto error; + lttng_chan_buf->priv->rb_chan = shmp(handle, handle->chan); + return lttng_chan_buf; + +error: + lttng_ust_free_channel_common(lttng_chan_buf->parent); + return NULL; } static -void lttng_channel_destroy(struct lttng_channel *chan) +void lttng_channel_destroy(struct lttng_ust_channel_buffer *lttng_chan_buf) { - channel_destroy(chan->chan, chan->handle, 1); + channel_destroy(lttng_chan_buf->priv->rb_chan, lttng_chan_buf->priv->rb_chan->handle, 1); + lttng_ust_free_channel_common(lttng_chan_buf->parent); } static -int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx, uint32_t event_id) +int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx) { - return lib_ring_buffer_reserve(&client_config, ctx); + int ret; + + memset(&URCU_TLS(private_ctx), 0, sizeof(struct lttng_ust_lib_ring_buffer_ctx_private)); + URCU_TLS(private_ctx).pub = ctx; + URCU_TLS(private_ctx).chan = ctx->client_priv; + ctx->priv = &URCU_TLS(private_ctx); + ret = lib_ring_buffer_reserve(&client_config, ctx, NULL); + if (ret) + return ret; + if (lib_ring_buffer_backend_get_pages(&client_config, ctx, + &ctx->priv->backend_pages)) + return -EPERM; + return 0; } static @@ -223,84 +268,79 @@ void lttng_event_commit(struct lttng_ust_lib_ring_buffer_ctx *ctx) } static -void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx, const void *src, - size_t len) +void lttng_event_write(struct lttng_ust_lib_ring_buffer_ctx *ctx, + const void *src, size_t len, size_t alignment) { + lttng_ust_lib_ring_buffer_align_ctx(ctx, alignment); lib_ring_buffer_write(&client_config, ctx, src, len); } static -size_t lttng_packet_avail_size(struct channel *chan, struct lttng_ust_shm_handle *handle) - +size_t lttng_packet_avail_size(struct lttng_ust_channel_buffer *chan) { + struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; unsigned long o_begin; struct lttng_ust_lib_ring_buffer *buf; - buf = shmp(handle, chan->backend.buf[0].shmp); /* Only for global buffer ! */ + buf = shmp(rb_chan->handle, rb_chan->backend.buf[0].shmp); /* Only for global buffer ! */ o_begin = v_read(&client_config, &buf->offset); - if (subbuf_offset(o_begin, chan) != 0) { - return chan->backend.subbuf_size - subbuf_offset(o_begin, chan); + if (subbuf_offset(o_begin, rb_chan) != 0) { + return rb_chan->backend.subbuf_size - subbuf_offset(o_begin, rb_chan); } else { - return chan->backend.subbuf_size - subbuf_offset(o_begin, chan) + return rb_chan->backend.subbuf_size - subbuf_offset(o_begin, rb_chan) - sizeof(struct metadata_packet_header); } } -#if 0 static -wait_queue_head_t *lttng_get_reader_wait_queue(struct channel *chan) +int lttng_is_finalized(struct lttng_ust_channel_buffer *chan) { - return &chan->read_wait; -} + struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; -static -wait_queue_head_t *lttng_get_hp_wait_queue(struct channel *chan) -{ - return &chan->hp_wait; + return lib_ring_buffer_channel_is_finalized(rb_chan); } -#endif //0 static -int lttng_is_finalized(struct channel *chan) +int lttng_is_disabled(struct lttng_ust_channel_buffer *chan) { - return lib_ring_buffer_channel_is_finalized(chan); -} + struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; -static -int lttng_is_disabled(struct channel *chan) -{ - return lib_ring_buffer_channel_is_disabled(chan); + return lib_ring_buffer_channel_is_disabled(rb_chan); } static -int lttng_flush_buffer(struct channel *chan, struct lttng_ust_shm_handle *handle) +int lttng_flush_buffer(struct lttng_ust_channel_buffer *chan) { + struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; struct lttng_ust_lib_ring_buffer *buf; int shm_fd, wait_fd, wakeup_fd; uint64_t memory_map_size; - buf = channel_get_ring_buffer(&client_config, chan, - 0, handle, &shm_fd, &wait_fd, &wakeup_fd, + buf = channel_get_ring_buffer(&client_config, rb_chan, + 0, rb_chan->handle, &shm_fd, &wait_fd, &wakeup_fd, &memory_map_size); lib_ring_buffer_switch(&client_config, buf, - SWITCH_ACTIVE, handle); + SWITCH_ACTIVE, rb_chan->handle); return 0; } static struct lttng_transport lttng_relay_transport = { .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap", .ops = { - .channel_create = _channel_create, - .channel_destroy = lttng_channel_destroy, + .struct_size = sizeof(struct lttng_ust_channel_buffer_ops), + + .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_channel_buffer_ops_private, { + .pub = <tng_relay_transport.ops, + .channel_create = _channel_create, + .channel_destroy = lttng_channel_destroy, + .packet_avail_size = lttng_packet_avail_size, + .is_finalized = lttng_is_finalized, + .is_disabled = lttng_is_disabled, + .flush_buffer = lttng_flush_buffer, + }), .event_reserve = lttng_event_reserve, .event_commit = lttng_event_commit, .event_write = lttng_event_write, - .packet_avail_size = lttng_packet_avail_size, - //.get_reader_wait_queue = lttng_get_reader_wait_queue, - //.get_hp_wait_queue = lttng_get_hp_wait_queue, - .is_finalized = lttng_is_finalized, - .is_disabled = lttng_is_disabled, - .flush_buffer = lttng_flush_buffer, }, .client_config = &client_config, };