X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=liblttng-ust%2Flttng-ring-buffer-client.h;h=96302ee7ac185ef02e5a7438954fde550951a7bc;hb=3b8bedd809f1a5b56da5fc101a90b44263b0f473;hp=4fbfc709a19d9e8f834384aef54c0cbe3bbad2bb;hpb=e7bc0ef6c86ae97886cf5f8b28854cf281d4962b;p=lttng-ust.git diff --git a/liblttng-ust/lttng-ring-buffer-client.h b/liblttng-ust/lttng-ring-buffer-client.h index 4fbfc709..96302ee7 100644 --- a/liblttng-ust/lttng-ring-buffer-client.h +++ b/liblttng-ust/lttng-ring-buffer-client.h @@ -6,10 +6,12 @@ * LTTng lib ring buffer client template. */ +#include #include #include #include +#include #include "ust-bitfield.h" #include "ust-compat.h" #include "clock.h" @@ -62,6 +64,8 @@ struct packet_header { struct lttng_client_ctx { size_t packet_context_len; size_t event_context_len; + struct lttng_ust_ctx *chan_ctx; + struct lttng_ust_ctx *event_ctx; }; static inline uint64_t lib_ring_buffer_clock_read(struct lttng_ust_lib_ring_buffer_channel *chan) @@ -77,7 +81,7 @@ size_t ctx_get_aligned_size(size_t offset, struct lttng_ust_ctx *ctx, if (caa_likely(!ctx)) return 0; - offset += lib_ring_buffer_align(offset, ctx->largest_align); + offset += lttng_ust_lib_ring_buffer_align(offset, ctx->largest_align); offset += ctx_len; return offset - orig_offset; } @@ -127,7 +131,7 @@ void ctx_record(struct lttng_ust_lib_ring_buffer_ctx *bufctx, if (caa_likely(!ctx)) return; - lib_ring_buffer_align_ctx(bufctx, ctx->largest_align); + lttng_ust_lib_ring_buffer_align_ctx(bufctx, ctx->largest_align); for (i = 0; i < ctx->nr_fields; i++) { if (mode == APP_CTX_ENABLED) { ctx->fields[i]->record(ctx->fields[i], bufctx, chan); @@ -173,13 +177,12 @@ size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, struct lttng_client_ctx *client_ctx) { struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); - struct lttng_ust_stack_ctx *lttng_ctx = ctx->priv; size_t orig_offset = offset; size_t padding; switch (lttng_chan->priv->header_type) { case 1: /* compact */ - padding = lib_ring_buffer_align(offset, lttng_alignof(uint32_t)); + padding = lttng_ust_lib_ring_buffer_align(offset, lttng_alignof(uint32_t)); offset += padding; if (!(ctx->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { offset += sizeof(uint32_t); /* id and timestamp */ @@ -187,24 +190,24 @@ size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, /* Minimum space taken by LTTNG_COMPACT_EVENT_BITS id */ offset += (LTTNG_COMPACT_EVENT_BITS + CHAR_BIT - 1) / CHAR_BIT; /* Align extended struct on largest member */ - offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); + offset += lttng_ust_lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); offset += sizeof(uint32_t); /* id */ - offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); + offset += lttng_ust_lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); offset += sizeof(uint64_t); /* timestamp */ } break; case 2: /* large */ - padding = lib_ring_buffer_align(offset, lttng_alignof(uint16_t)); + padding = lttng_ust_lib_ring_buffer_align(offset, lttng_alignof(uint16_t)); offset += padding; offset += sizeof(uint16_t); if (!(ctx->rflags & (RING_BUFFER_RFLAG_FULL_TSC | LTTNG_RFLAG_EXTENDED))) { - offset += lib_ring_buffer_align(offset, lttng_alignof(uint32_t)); + offset += lttng_ust_lib_ring_buffer_align(offset, lttng_alignof(uint32_t)); offset += sizeof(uint32_t); /* timestamp */ } else { /* Align extended struct on largest member */ - offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); + offset += lttng_ust_lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); offset += sizeof(uint32_t); /* id */ - offset += lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); + offset += lttng_ust_lib_ring_buffer_align(offset, lttng_alignof(uint64_t)); offset += sizeof(uint64_t); /* timestamp */ } break; @@ -212,9 +215,9 @@ size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, padding = 0; WARN_ON_ONCE(1); } - offset += ctx_get_aligned_size(offset, lttng_ctx->chan_ctx, + offset += ctx_get_aligned_size(offset, client_ctx->chan_ctx, client_ctx->packet_context_len); - offset += ctx_get_aligned_size(offset, lttng_ctx->event_ctx, + offset += ctx_get_aligned_size(offset, client_ctx->event_ctx, client_ctx->event_context_len); *pre_header_padding = padding; return offset - orig_offset; @@ -226,6 +229,7 @@ size_t record_header_size(const struct lttng_ust_lib_ring_buffer_config *config, static void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config *config, struct lttng_ust_lib_ring_buffer_ctx *ctx, + struct lttng_client_ctx *client_ctx, uint32_t event_id); /* @@ -240,10 +244,10 @@ void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config static __inline__ void lttng_write_event_header(const struct lttng_ust_lib_ring_buffer_config *config, struct lttng_ust_lib_ring_buffer_ctx *ctx, + struct lttng_client_ctx *client_ctx, uint32_t event_id) { struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->chan); - struct lttng_ust_stack_ctx *lttng_ctx = ctx->priv; if (caa_unlikely(ctx->rflags)) goto slow_path; @@ -270,7 +274,7 @@ void lttng_write_event_header(const struct lttng_ust_lib_ring_buffer_config *con uint16_t id = event_id; lib_ring_buffer_write(config, ctx, &id, sizeof(id)); - lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint32_t)); + lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint32_t)); lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); break; } @@ -278,23 +282,23 @@ void lttng_write_event_header(const struct lttng_ust_lib_ring_buffer_config *con WARN_ON_ONCE(1); } - ctx_record(ctx, lttng_chan, lttng_ctx->chan_ctx, APP_CTX_ENABLED); - ctx_record(ctx, lttng_chan, lttng_ctx->event_ctx, APP_CTX_ENABLED); - lib_ring_buffer_align_ctx(ctx, ctx->largest_align); + ctx_record(ctx, lttng_chan, client_ctx->chan_ctx, APP_CTX_ENABLED); + ctx_record(ctx, lttng_chan, client_ctx->event_ctx, APP_CTX_ENABLED); + lttng_ust_lib_ring_buffer_align_ctx(ctx, ctx->largest_align); return; slow_path: - lttng_write_event_header_slow(config, ctx, event_id); + lttng_write_event_header_slow(config, ctx, client_ctx, event_id); } static void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config *config, struct lttng_ust_lib_ring_buffer_ctx *ctx, + struct lttng_client_ctx *client_ctx, uint32_t event_id) { struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->chan); - struct lttng_ust_stack_ctx *lttng_ctx = ctx->priv; switch (lttng_chan->priv->header_type) { case 1: /* compact */ @@ -320,9 +324,9 @@ void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config 31); lib_ring_buffer_write(config, ctx, &id, sizeof(id)); /* Align extended struct on largest member */ - lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); + lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id)); - lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); + lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); } break; @@ -333,7 +337,7 @@ void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config uint16_t id = event_id; lib_ring_buffer_write(config, ctx, &id, sizeof(id)); - lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint32_t)); + lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint32_t)); lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); } else { uint16_t id = 65535; @@ -341,9 +345,9 @@ void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config lib_ring_buffer_write(config, ctx, &id, sizeof(id)); /* Align extended struct on largest member */ - lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); + lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); lib_ring_buffer_write(config, ctx, &event_id, sizeof(event_id)); - lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); + lttng_ust_lib_ring_buffer_align_ctx(ctx, lttng_alignof(uint64_t)); lib_ring_buffer_write(config, ctx, ×tamp, sizeof(timestamp)); } break; @@ -351,9 +355,9 @@ void lttng_write_event_header_slow(const struct lttng_ust_lib_ring_buffer_config default: WARN_ON_ONCE(1); } - ctx_record(ctx, lttng_chan, lttng_ctx->chan_ctx, APP_CTX_ENABLED); - ctx_record(ctx, lttng_chan, lttng_ctx->event_ctx, APP_CTX_ENABLED); - lib_ring_buffer_align_ctx(ctx, ctx->largest_align); + ctx_record(ctx, lttng_chan, client_ctx->chan_ctx, APP_CTX_ENABLED); + ctx_record(ctx, lttng_chan, client_ctx->event_ctx, APP_CTX_ENABLED); + lttng_ust_lib_ring_buffer_align_ctx(ctx, ctx->largest_align); } static const struct lttng_ust_lib_ring_buffer_config client_config; @@ -478,9 +482,10 @@ static struct packet_header *client_packet_header(struct lttng_ust_lib_ring_buff } static int client_timestamp_begin(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *timestamp_begin) { + struct lttng_ust_shm_handle *handle = chan->handle; struct packet_header *header; header = client_packet_header(buf, handle); @@ -491,9 +496,10 @@ static int client_timestamp_begin(struct lttng_ust_lib_ring_buffer *buf, } static int client_timestamp_end(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *timestamp_end) { + struct lttng_ust_shm_handle *handle = chan->handle; struct packet_header *header; header = client_packet_header(buf, handle); @@ -504,9 +510,10 @@ static int client_timestamp_end(struct lttng_ust_lib_ring_buffer *buf, } static int client_events_discarded(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *events_discarded) { + struct lttng_ust_shm_handle *handle = chan->handle; struct packet_header *header; header = client_packet_header(buf, handle); @@ -517,9 +524,10 @@ static int client_events_discarded(struct lttng_ust_lib_ring_buffer *buf, } static int client_content_size(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *content_size) { + struct lttng_ust_shm_handle *handle = chan->handle; struct packet_header *header; header = client_packet_header(buf, handle); @@ -530,9 +538,10 @@ static int client_content_size(struct lttng_ust_lib_ring_buffer *buf, } static int client_packet_size(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *packet_size) { + struct lttng_ust_shm_handle *handle = chan->handle; struct packet_header *header; header = client_packet_header(buf, handle); @@ -543,11 +552,9 @@ static int client_packet_size(struct lttng_ust_lib_ring_buffer *buf, } static int client_stream_id(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *stream_id) { - struct lttng_ust_lib_ring_buffer_channel *chan = shmp(handle, - buf->backend.chan); struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(chan); *stream_id = lttng_chan->priv->id; @@ -556,21 +563,19 @@ static int client_stream_id(struct lttng_ust_lib_ring_buffer *buf, } static int client_current_timestamp(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *ts) { - struct lttng_ust_lib_ring_buffer_channel *chan; - - chan = shmp(handle, handle->chan); *ts = client_ring_buffer_clock_read(chan); return 0; } static int client_sequence_number(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *seq) { + struct lttng_ust_shm_handle *handle = chan->handle; struct packet_header *header; header = client_packet_header(buf, handle); @@ -581,7 +586,7 @@ static int client_sequence_number(struct lttng_ust_lib_ring_buffer *buf, } static int client_instance_id(struct lttng_ust_lib_ring_buffer *buf, - struct lttng_ust_shm_handle *handle, + struct lttng_ust_lib_ring_buffer_channel *chan, uint64_t *id) { *id = buf->backend.cpu; @@ -672,8 +677,7 @@ struct lttng_ust_channel_buffer *_channel_create(const char *name, stream_fds, nr_stream_fds, blocking_timeout); if (!handle) goto error; - lttng_chan_buf->handle = handle; - lttng_chan_buf->chan = shmp(handle, handle->chan); + lttng_chan_buf->priv->rb_chan = shmp(handle, handle->chan); return lttng_chan_buf; error: @@ -684,7 +688,7 @@ error: static void lttng_channel_destroy(struct lttng_ust_channel_buffer *lttng_chan_buf) { - channel_destroy(lttng_chan_buf->chan, lttng_chan_buf->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); } @@ -692,21 +696,23 @@ static int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx, uint32_t event_id) { - struct lttng_ust_channel_buffer *lttng_chan = channel_get_private(ctx->chan); struct lttng_ust_stack_ctx *lttng_ctx = ctx->priv; + struct lttng_ust_event_recorder *event_recorder = lttng_ctx->event_recorder; + struct lttng_ust_channel_buffer *lttng_chan = event_recorder->chan; struct lttng_client_ctx client_ctx; - int ret, cpu; + int ret; + ctx->chan = lttng_chan->priv->rb_chan; + client_ctx.chan_ctx = lttng_ust_rcu_dereference(lttng_chan->priv->ctx); + client_ctx.event_ctx = lttng_ust_rcu_dereference(event_recorder->priv->ctx); /* Compute internal size of context structures. */ - ctx_get_struct_size(lttng_ctx->chan_ctx, &client_ctx.packet_context_len, + ctx_get_struct_size(client_ctx.chan_ctx, &client_ctx.packet_context_len, APP_CTX_ENABLED); - ctx_get_struct_size(lttng_ctx->event_ctx, &client_ctx.event_context_len, + ctx_get_struct_size(client_ctx.event_ctx, &client_ctx.event_context_len, APP_CTX_ENABLED); - cpu = lib_ring_buffer_get_cpu(&client_config); - if (cpu < 0) + if (lib_ring_buffer_nesting_inc(&client_config) < 0) return -EPERM; - ctx->cpu = cpu; switch (lttng_chan->priv->header_type) { case 1: /* compact */ @@ -729,10 +735,10 @@ int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx, ret = -EPERM; goto put; } - lttng_write_event_header(&client_config, ctx, event_id); + lttng_write_event_header(&client_config, ctx, &client_ctx, event_id); return 0; put: - lib_ring_buffer_put_cpu(&client_config); + lib_ring_buffer_nesting_dec(&client_config); return ret; } @@ -740,7 +746,7 @@ static void lttng_event_commit(struct lttng_ust_lib_ring_buffer_ctx *ctx) { lib_ring_buffer_commit(&client_config, ctx); - lib_ring_buffer_put_cpu(&client_config); + lib_ring_buffer_nesting_dec(&client_config); } static @@ -757,48 +763,45 @@ void lttng_event_strcpy(struct lttng_ust_lib_ring_buffer_ctx *ctx, const char *s lib_ring_buffer_strcpy(&client_config, ctx, src, len, '#'); } -#if 0 static -wait_queue_head_t *lttng_get_reader_wait_queue(struct lttng_ust_lib_ring_buffer_channel *chan) +void lttng_event_pstrcpy_pad(struct lttng_ust_lib_ring_buffer_ctx *ctx, + const char *src, size_t len) { - return &chan->read_wait; + lib_ring_buffer_pstrcpy(&client_config, ctx, src, len, '\0'); } static -wait_queue_head_t *lttng_get_hp_wait_queue(struct lttng_ust_lib_ring_buffer_channel *chan) +int lttng_is_finalized(struct lttng_ust_channel_buffer *chan) { - return &chan->hp_wait; -} -#endif //0 + struct lttng_ust_lib_ring_buffer_channel *rb_chan = chan->priv->rb_chan; -static -int lttng_is_finalized(struct lttng_ust_lib_ring_buffer_channel *chan) -{ - return lib_ring_buffer_channel_is_finalized(chan); + return lib_ring_buffer_channel_is_finalized(rb_chan); } static -int lttng_is_disabled(struct lttng_ust_lib_ring_buffer_channel *chan) +int lttng_is_disabled(struct lttng_ust_channel_buffer *chan) { - return lib_ring_buffer_channel_is_disabled(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_lib_ring_buffer_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 cpu; - for_each_channel_cpu(cpu, chan) { + for_each_channel_cpu(cpu, rb_chan) { int shm_fd, wait_fd, wakeup_fd; uint64_t memory_map_size; - buf = channel_get_ring_buffer(&client_config, chan, - cpu, handle, &shm_fd, &wait_fd, + buf = channel_get_ring_buffer(&client_config, rb_chan, + cpu, 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; } @@ -806,8 +809,8 @@ int lttng_flush_buffer(struct lttng_ust_lib_ring_buffer_channel *chan, static struct lttng_transport lttng_relay_transport = { .name = "relay-" RING_BUFFER_MODE_TEMPLATE_STRING "-mmap", .ops = { - .struct_size = sizeof(struct lttng_ust_channel_ops), - .priv = __LTTNG_COMPOUND_LITERAL(struct lttng_ust_channel_ops_private, { + .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, @@ -820,6 +823,7 @@ static struct lttng_transport lttng_relay_transport = { .event_commit = lttng_event_commit, .event_write = lttng_event_write, .event_strcpy = lttng_event_strcpy, + .event_pstrcpy_pad = lttng_event_pstrcpy_pad, }, .client_config = &client_config, };