X-Git-Url: http://git.liburcu.org/?a=blobdiff_plain;f=liblttng-ust%2Flttng-ring-buffer-metadata-client.h;h=45340a7b67f052dbe52467bfe8b53eae2cb44ae9;hb=HEAD;hp=8a0fdc5c9dbfbccb34ddcd9c6d37bbaee5eed81c;hpb=8936b6c0add7eb6706e0a1ca50e03c446dda4006;p=lttng-ust.git diff --git a/liblttng-ust/lttng-ring-buffer-metadata-client.h b/liblttng-ust/lttng-ring-buffer-metadata-client.h deleted file mode 100644 index 8a0fdc5c..00000000 --- a/liblttng-ust/lttng-ring-buffer-metadata-client.h +++ /dev/null @@ -1,360 +0,0 @@ -/* - * SPDX-License-Identifier: LGPL-2.1-only - * - * Copyright (C) 2010-2012 Mathieu Desnoyers - * - * LTTng lib ring buffer client template. - */ - -#include -#include -#include - -#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 */ - uint8_t uuid[LTTNG_UST_UUID_LEN]; /* Unique Universal Identifier */ - uint32_t checksum; /* 0 if unused */ - uint32_t content_size; /* in bits */ - uint32_t packet_size; /* in bits */ - uint8_t compression_scheme; /* 0 if unused */ - uint8_t encryption_scheme; /* 0 if unused */ - uint8_t checksum_scheme; /* 0 if unused */ - uint8_t major; /* CTF spec major version number */ - uint8_t minor; /* CTF spec minor version number */ - uint8_t header_end[0]; -}; - -struct metadata_record_header { - uint8_t header_end[0]; /* End of header */ -}; - -static const struct lttng_ust_lib_ring_buffer_config client_config; - -/* 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 -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, - void *client_ctx) -{ - return 0; -} - -#include "../libringbuffer/api.h" -#include "lttng-rb-clients.h" - -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 lttng_ust_lib_ring_buffer_channel *chan, - size_t offset, - size_t *pre_header_padding, - struct lttng_ust_lib_ring_buffer_ctx *ctx, - void *client_ctx) -{ - return 0; -} - -/** - * client_packet_header_size - called on buffer-switch to a new sub-buffer - * - * Return header size without padding after the structure. Don't use packed - * structure because gcc generates inefficient code on some architectures - * (powerpc, mips..) - */ -static size_t client_packet_header_size(void) -{ - return offsetof(struct metadata_packet_header, header_end); -} - -static void client_buffer_begin(struct lttng_ust_lib_ring_buffer *buf, uint64_t tsc, - unsigned int subbuf_idx, - struct lttng_ust_shm_handle *handle) -{ - 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_ust_channel_buffer *lttng_chan = channel_get_private(chan); - - assert(header); - if (!header) - return; - header->magic = TSDL_MAGIC_NUMBER; - 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 */ - header->compression_scheme = 0; /* 0 if unused */ - header->encryption_scheme = 0; /* 0 if unused */ - header->checksum_scheme = 0; /* 0 if unused */ - header->major = CTF_SPEC_MAJOR; - header->minor = CTF_SPEC_MINOR; -} - -/* - * offset is assumed to never be 0 here : never deliver a completely empty - * subbuffer. data_size is between 1 and subbuf_size. - */ -static void client_buffer_end(struct lttng_ust_lib_ring_buffer *buf, uint64_t tsc, - unsigned int subbuf_idx, unsigned long data_size, - struct lttng_ust_shm_handle *handle) -{ - 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); - unsigned long records_lost = 0; - - assert(header); - if (!header) - return; - header->content_size = 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. - */ - (void) lib_ring_buffer_get_records_lost_full(&client_config, buf); - records_lost += lib_ring_buffer_get_records_lost_wrap(&client_config, buf); - records_lost += lib_ring_buffer_get_records_lost_big(&client_config, buf); - WARN_ON_ONCE(records_lost != 0); -} - -static int client_buffer_create(struct lttng_ust_lib_ring_buffer *buf, void *priv, - int cpu, const char *name, - struct lttng_ust_shm_handle *handle) -{ - return 0; -} - -static void client_buffer_finalize(struct lttng_ust_lib_ring_buffer *buf, - void *priv, int cpu, - struct lttng_ust_shm_handle *handle) -{ -} - -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, - .cb.subbuffer_header_size = client_packet_header_size, - .cb.buffer_begin = client_buffer_begin, - .cb.buffer_end = client_buffer_end, - .cb.buffer_create = client_buffer_create, - .cb.buffer_finalize = client_buffer_finalize, - - .tsc_bits = 0, - .alloc = RING_BUFFER_ALLOC_GLOBAL, - .sync = RING_BUFFER_SYNC_GLOBAL, - .mode = RING_BUFFER_MODE_TEMPLATE, - .backend = RING_BUFFER_PAGE, - .output = RING_BUFFER_MMAP, - .oops = RING_BUFFER_OOPS_CONSISTENCY, - .ipi = RING_BUFFER_NO_IPI_BARRIER, - .wakeup = RING_BUFFER_WAKEUP_BY_WRITER, - .client_type = LTTNG_CLIENT_TYPE, - - .cb_ptr = &client_cb.parent, -}; - -static -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, - uint32_t chan_id, - const int *stream_fds, int nr_stream_fds, - int64_t blocking_timeout) -{ - struct lttng_ust_abi_channel_config chan_priv_init; - struct lttng_ust_shm_handle *handle; - 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, - __alignof__(struct lttng_ust_channel_buffer), - sizeof(struct lttng_ust_channel_buffer), - &chan_priv_init, - lttng_chan_buf, buf_addr, subbuf_size, num_subbuf, - switch_timer_interval, read_timer_interval, - stream_fds, nr_stream_fds, blocking_timeout); - if (!handle) - 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_ust_channel_buffer *lttng_chan_buf) -{ - 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) -{ - int ret; - - memset(&private_ctx, 0, sizeof(private_ctx)); - private_ctx.pub = ctx; - private_ctx.chan = ctx->client_priv; - ctx->priv = &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 -void lttng_event_commit(struct lttng_ust_lib_ring_buffer_ctx *ctx) -{ - lib_ring_buffer_commit(&client_config, ctx); -} - -static -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 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(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, rb_chan) != 0) { - return rb_chan->backend.subbuf_size - subbuf_offset(o_begin, rb_chan); - } else { - return rb_chan->backend.subbuf_size - subbuf_offset(o_begin, rb_chan) - - sizeof(struct metadata_packet_header); - } -} - -static -int lttng_is_finalized(struct lttng_ust_channel_buffer *chan) -{ - struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; - - return lib_ring_buffer_channel_is_finalized(rb_chan); -} - -static -int lttng_is_disabled(struct lttng_ust_channel_buffer *chan) -{ - struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; - - return lib_ring_buffer_channel_is_disabled(rb_chan); -} - -static -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, rb_chan, - 0, rb_chan->handle, &shm_fd, &wait_fd, &wakeup_fd, - &memory_map_size); - lib_ring_buffer_switch(&client_config, buf, - SWITCH_ACTIVE, rb_chan->handle); - return 0; -} - -static struct lttng_transport lttng_relay_transport = { - .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap", - .ops = { - .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, - }, - .client_config = &client_config, -}; - -void RING_BUFFER_MODE_TEMPLATE_INIT(void) -{ - DBG("LTT : ltt ring buffer client \"%s\" init\n", - "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap"); - lttng_transport_register(<tng_relay_transport); -} - -void RING_BUFFER_MODE_TEMPLATE_EXIT(void) -{ - DBG("LTT : ltt ring buffer client \"%s\" exit\n", - "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap"); - lttng_transport_unregister(<tng_relay_transport); -}