+++ /dev/null
-/*
- * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
- * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License only.
- *
- * This program 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#define _GNU_SOURCE
-#include <string.h>
-#include <lttng/ust-ctl.h>
-#include <lttng/ust-abi.h>
-#include <lttng/ust-events.h>
-#include <sys/mman.h>
-
-#include <usterr-signal-safe.h>
-#include <ust-comm.h>
-#include <helper.h>
-
-#include "../libringbuffer/backend.h"
-#include "../libringbuffer/frontend.h"
-
-/*
- * Channel representation within consumer.
- */
-struct ustctl_consumer_channel {
- struct lttng_channel *chan; /* lttng channel buffers */
-
- /* initial attributes */
- struct ustctl_consumer_channel_attr attr;
-};
-
-/*
- * Stream representation within consumer.
- */
-struct ustctl_consumer_stream {
- struct lttng_ust_shm_handle *handle; /* shared-memory handle */
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *chan;
- int shm_fd, wait_fd, wakeup_fd;
- int cpu;
- uint64_t memory_map_size;
-};
-
-extern void lttng_ring_buffer_client_overwrite_init(void);
-extern void lttng_ring_buffer_client_discard_init(void);
-extern void lttng_ring_buffer_metadata_client_init(void);
-extern void lttng_ring_buffer_client_overwrite_exit(void);
-extern void lttng_ring_buffer_client_discard_exit(void);
-extern void lttng_ring_buffer_metadata_client_exit(void);
-
-volatile enum ust_loglevel ust_loglevel;
-
-int ustctl_release_handle(int sock, int handle)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
-
- if (sock < 0 || handle < 0)
- return 0;
- memset(&lum, 0, sizeof(lum));
- lum.handle = handle;
- lum.cmd = LTTNG_UST_RELEASE;
- return ustcomm_send_app_cmd(sock, &lum, &lur);
-}
-
-/*
- * If sock is negative, it means we don't have to notify the other side
- * (e.g. application has already vanished).
- */
-int ustctl_release_object(int sock, struct lttng_ust_object_data *data)
-{
- int ret;
-
- if (!data)
- return -EINVAL;
-
- switch (data->type) {
- case LTTNG_UST_OBJECT_TYPE_CHANNEL:
- free(data->u.channel.data);
- break;
- case LTTNG_UST_OBJECT_TYPE_STREAM:
- if (data->u.stream.shm_fd >= 0) {
- ret = close(data->u.stream.shm_fd);
- if (ret < 0) {
- ret = -errno;
- return ret;
- }
- }
- if (data->u.stream.wakeup_fd >= 0) {
- ret = close(data->u.stream.wakeup_fd);
- if (ret < 0) {
- ret = -errno;
- return ret;
- }
- }
- break;
- default:
- assert(0);
- }
- return ustctl_release_handle(sock, data->handle);
-}
-
-/*
- * Send registration done packet to the application.
- */
-int ustctl_register_done(int sock)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- DBG("Sending register done command to %d", sock);
- memset(&lum, 0, sizeof(lum));
- lum.handle = LTTNG_UST_ROOT_HANDLE;
- lum.cmd = LTTNG_UST_REGISTER_DONE;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- return 0;
-}
-
-/*
- * returns session handle.
- */
-int ustctl_create_session(int sock)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret, session_handle;
-
- /* Create session */
- memset(&lum, 0, sizeof(lum));
- lum.handle = LTTNG_UST_ROOT_HANDLE;
- lum.cmd = LTTNG_UST_SESSION;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- session_handle = lur.ret_val;
- DBG("received session handle %u", session_handle);
- return session_handle;
-}
-
-int ustctl_create_event(int sock, struct lttng_ust_event *ev,
- struct lttng_ust_object_data *channel_data,
- struct lttng_ust_object_data **_event_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- struct lttng_ust_object_data *event_data;
- int ret;
-
- if (!channel_data || !_event_data)
- return -EINVAL;
-
- event_data = zmalloc(sizeof(*event_data));
- if (!event_data)
- return -ENOMEM;
- memset(&lum, 0, sizeof(lum));
- lum.handle = channel_data->handle;
- lum.cmd = LTTNG_UST_EVENT;
- strncpy(lum.u.event.name, ev->name,
- LTTNG_UST_SYM_NAME_LEN);
- lum.u.event.instrumentation = ev->instrumentation;
- lum.u.event.loglevel_type = ev->loglevel_type;
- lum.u.event.loglevel = ev->loglevel;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret) {
- free(event_data);
- return ret;
- }
- event_data->handle = lur.ret_val;
- DBG("received event handle %u", event_data->handle);
- *_event_data = event_data;
- return 0;
-}
-
-int ustctl_add_context(int sock, struct lttng_ust_context *ctx,
- struct lttng_ust_object_data *obj_data,
- struct lttng_ust_object_data **_context_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- struct lttng_ust_object_data *context_data;
- int ret;
-
- if (!obj_data || !_context_data)
- return -EINVAL;
-
- context_data = zmalloc(sizeof(*context_data));
- if (!context_data)
- return -ENOMEM;
- memset(&lum, 0, sizeof(lum));
- lum.handle = obj_data->handle;
- lum.cmd = LTTNG_UST_CONTEXT;
- lum.u.context.ctx = ctx->ctx;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret) {
- free(context_data);
- return ret;
- }
- context_data->handle = lur.ret_val;
- DBG("received context handle %u", context_data->handle);
- *_context_data = context_data;
- return ret;
-}
-
-int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode,
- struct lttng_ust_object_data *obj_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- if (!obj_data)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = obj_data->handle;
- lum.cmd = LTTNG_UST_FILTER;
- lum.u.filter.data_size = bytecode->len;
- lum.u.filter.reloc_offset = bytecode->reloc_offset;
- lum.u.filter.seqnum = bytecode->seqnum;
-
- ret = ustcomm_send_app_msg(sock, &lum);
- if (ret)
- return ret;
- /* send var len bytecode */
- ret = ustcomm_send_unix_sock(sock, bytecode->data,
- bytecode->len);
- if (ret < 0) {
- if (ret == -ECONNRESET)
- fprintf(stderr, "remote end closed connection\n");
- return ret;
- }
- if (ret != bytecode->len)
- return -EINVAL;
- return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
-}
-
-/* Enable event, channel and session ioctl */
-int ustctl_enable(int sock, struct lttng_ust_object_data *object)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- if (!object)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = object->handle;
- lum.cmd = LTTNG_UST_ENABLE;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- DBG("enabled handle %u", object->handle);
- return 0;
-}
-
-/* Disable event, channel and session ioctl */
-int ustctl_disable(int sock, struct lttng_ust_object_data *object)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- if (!object)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = object->handle;
- lum.cmd = LTTNG_UST_DISABLE;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- DBG("disable handle %u", object->handle);
- return 0;
-}
-
-int ustctl_start_session(int sock, int handle)
-{
- struct lttng_ust_object_data obj;
-
- obj.handle = handle;
- return ustctl_enable(sock, &obj);
-}
-
-int ustctl_stop_session(int sock, int handle)
-{
- struct lttng_ust_object_data obj;
-
- obj.handle = handle;
- return ustctl_disable(sock, &obj);
-}
-
-int ustctl_tracepoint_list(int sock)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret, tp_list_handle;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = LTTNG_UST_ROOT_HANDLE;
- lum.cmd = LTTNG_UST_TRACEPOINT_LIST;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- tp_list_handle = lur.ret_val;
- DBG("received tracepoint list handle %u", tp_list_handle);
- return tp_list_handle;
-}
-
-int ustctl_tracepoint_list_get(int sock, int tp_list_handle,
- struct lttng_ust_tracepoint_iter *iter)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- if (!iter)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = tp_list_handle;
- lum.cmd = LTTNG_UST_TRACEPOINT_LIST_GET;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- DBG("received tracepoint list entry name %s loglevel %d",
- lur.u.tracepoint.name,
- lur.u.tracepoint.loglevel);
- memcpy(iter, &lur.u.tracepoint, sizeof(*iter));
- return 0;
-}
-
-int ustctl_tracepoint_field_list(int sock)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret, tp_field_list_handle;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = LTTNG_UST_ROOT_HANDLE;
- lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- tp_field_list_handle = lur.ret_val;
- DBG("received tracepoint field list handle %u", tp_field_list_handle);
- return tp_field_list_handle;
-}
-
-int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle,
- struct lttng_ust_field_iter *iter)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
- ssize_t len;
-
- if (!iter)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = tp_field_list_handle;
- lum.cmd = LTTNG_UST_TRACEPOINT_FIELD_LIST_GET;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- len = ustcomm_recv_unix_sock(sock, iter, sizeof(*iter));
- if (len != sizeof(*iter)) {
- return -EINVAL;
- }
- DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d",
- iter->event_name,
- iter->loglevel,
- iter->field_name,
- iter->type);
- return 0;
-}
-
-int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- if (!v)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = LTTNG_UST_ROOT_HANDLE;
- lum.cmd = LTTNG_UST_TRACER_VERSION;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- memcpy(v, &lur.u.version, sizeof(*v));
- DBG("received tracer version");
- return 0;
-}
-
-int ustctl_wait_quiescent(int sock)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = LTTNG_UST_ROOT_HANDLE;
- lum.cmd = LTTNG_UST_WAIT_QUIESCENT;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- DBG("waited for quiescent state");
- return 0;
-}
-
-int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate)
-{
- if (!calibrate)
- return -EINVAL;
-
- return -ENOSYS;
-}
-
-int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- if (!object)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = object->handle;
- lum.cmd = LTTNG_UST_FLUSH_BUFFER;
- ret = ustcomm_send_app_cmd(sock, &lum, &lur);
- if (ret)
- return ret;
- DBG("flushed buffer handle %u", object->handle);
- return 0;
-}
-
-static
-int ustctl_send_channel(int sock,
- enum lttng_ust_chan_type type,
- void *data,
- uint64_t size,
- int send_fd_only)
-{
- ssize_t len;
-
- if (!send_fd_only) {
- /* Send mmap size */
- len = ustcomm_send_unix_sock(sock, &size, sizeof(size));
- if (len != sizeof(size)) {
- if (len < 0)
- return len;
- else
- return -EIO;
- }
-
- /* Send channel type */
- len = ustcomm_send_unix_sock(sock, &type, sizeof(type));
- if (len != sizeof(type)) {
- if (len < 0)
- return len;
- else
- return -EIO;
- }
- }
-
- /* Send channel data */
- len = ustcomm_send_unix_sock(sock, data, size);
- if (len != size) {
- if (len < 0)
- return len;
- else
- return -EIO;
- }
-
- return 0;
-}
-
-static
-int ustctl_send_stream(int sock,
- uint32_t stream_nr,
- uint64_t memory_map_size,
- int shm_fd, int wakeup_fd,
- int send_fd_only)
-{
- ssize_t len;
- int fds[2];
-
- if (!send_fd_only) {
- if (shm_fd < 0) {
- /* finish iteration */
- uint64_t v = -1;
-
- len = ustcomm_send_unix_sock(sock, &v, sizeof(v));
- if (len != sizeof(v)) {
- if (len < 0)
- return len;
- else
- return -EIO;
- }
- return 0;
- }
-
- /* Send mmap size */
- len = ustcomm_send_unix_sock(sock, &memory_map_size,
- sizeof(memory_map_size));
- if (len != sizeof(memory_map_size)) {
- if (len < 0)
- return len;
- else
- return -EIO;
- }
-
- /* Send stream nr */
- len = ustcomm_send_unix_sock(sock, &stream_nr,
- sizeof(stream_nr));
- if (len != sizeof(stream_nr)) {
- if (len < 0)
- return len;
- else
- return -EIO;
- }
- }
-
- /* Send shm fd and wakeup fd */
- fds[0] = shm_fd;
- fds[1] = wakeup_fd;
- len = ustcomm_send_fds_unix_sock(sock, fds, 2);
- if (len <= 0) {
- if (len < 0)
- return len;
- else
- return -EIO;
- }
- return 0;
-}
-
-int ustctl_recv_channel_from_consumer(int sock,
- struct lttng_ust_object_data **_channel_data)
-{
- struct lttng_ust_object_data *channel_data;
- ssize_t len;
- int ret;
-
- channel_data = zmalloc(sizeof(*channel_data));
- if (!channel_data) {
- ret = -ENOMEM;
- goto error_alloc;
- }
- channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL;
-
- /* recv mmap size */
- len = ustcomm_recv_unix_sock(sock, &channel_data->size,
- sizeof(channel_data->size));
- if (len != sizeof(channel_data->size)) {
- if (len < 0)
- ret = len;
- else
- ret = -EINVAL;
- goto error;
- }
-
- /* recv channel type */
- len = ustcomm_recv_unix_sock(sock, &channel_data->u.channel.type,
- sizeof(channel_data->u.channel.type));
- if (len != sizeof(channel_data->u.channel.type)) {
- if (len < 0)
- ret = len;
- else
- ret = -EINVAL;
- goto error;
- }
-
- /* recv channel data */
- channel_data->u.channel.data = zmalloc(channel_data->size);
- if (!channel_data->u.channel.data) {
- ret = -ENOMEM;
- goto error;
- }
- len = ustcomm_recv_unix_sock(sock, channel_data->u.channel.data,
- channel_data->size);
- if (len != channel_data->size) {
- if (len < 0)
- ret = len;
- else
- ret = -EINVAL;
- goto error_recv_data;
- }
-
- *_channel_data = channel_data;
- return 0;
-
-error_recv_data:
- free(channel_data->u.channel.data);
-error:
- free(channel_data);
-error_alloc:
- return ret;
-}
-
-int ustctl_recv_stream_from_consumer(int sock,
- struct lttng_ust_object_data **_stream_data)
-{
- struct lttng_ust_object_data *stream_data;
- ssize_t len;
- int ret;
- int fds[2];
-
- stream_data = zmalloc(sizeof(*stream_data));
- if (!stream_data) {
- ret = -ENOMEM;
- goto error_alloc;
- }
-
- stream_data->type = LTTNG_UST_OBJECT_TYPE_STREAM;
- stream_data->handle = -1;
-
- /* recv mmap size */
- len = ustcomm_recv_unix_sock(sock, &stream_data->size,
- sizeof(stream_data->size));
- if (len != sizeof(stream_data->size)) {
- if (len < 0)
- ret = len;
- else
- ret = -EINVAL;
- goto error;
- }
- if (stream_data->size == -1) {
- ret = -LTTNG_UST_ERR_NOENT;
- goto error;
- }
-
- /* recv stream nr */
- len = ustcomm_recv_unix_sock(sock, &stream_data->u.stream.stream_nr,
- sizeof(stream_data->u.stream.stream_nr));
- if (len != sizeof(stream_data->u.stream.stream_nr)) {
- if (len < 0)
- ret = len;
- else
- ret = -EINVAL;
- goto error;
- }
-
- /* recv shm fd and wakeup fd */
- len = ustcomm_recv_fds_unix_sock(sock, fds, 2);
- if (len <= 0) {
- if (len < 0) {
- ret = len;
- goto error;
- } else {
- ret = -EIO;
- goto error;
- }
- }
- stream_data->u.stream.shm_fd = fds[0];
- stream_data->u.stream.wakeup_fd = fds[1];
- *_stream_data = stream_data;
- return 0;
-
-error:
- free(stream_data);
-error_alloc:
- return ret;
-}
-
-int ustctl_send_channel_to_ust(int sock, int session_handle,
- struct lttng_ust_object_data *channel_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- if (!channel_data)
- return -EINVAL;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = session_handle;
- lum.cmd = LTTNG_UST_CHANNEL;
- lum.u.channel.len = channel_data->size;
- lum.u.channel.type = channel_data->u.channel.type;
- ret = ustcomm_send_app_msg(sock, &lum);
- if (ret)
- return ret;
-
- ret = ustctl_send_channel(sock,
- channel_data->u.channel.type,
- channel_data->u.channel.data,
- channel_data->size,
- 1);
- if (ret)
- return ret;
- ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
- if (!ret) {
- if (lur.ret_val >= 0) {
- channel_data->handle = lur.ret_val;
- }
- }
- return ret;
-}
-
-int ustctl_send_stream_to_ust(int sock,
- struct lttng_ust_object_data *channel_data,
- struct lttng_ust_object_data *stream_data)
-{
- struct ustcomm_ust_msg lum;
- struct ustcomm_ust_reply lur;
- int ret;
-
- memset(&lum, 0, sizeof(lum));
- lum.handle = channel_data->handle;
- lum.cmd = LTTNG_UST_STREAM;
- lum.u.stream.len = stream_data->size;
- lum.u.stream.stream_nr = stream_data->u.stream.stream_nr;
- ret = ustcomm_send_app_msg(sock, &lum);
- if (ret)
- return ret;
-
- assert(stream_data);
- assert(stream_data->type == LTTNG_UST_OBJECT_TYPE_STREAM);
-
- ret = ustctl_send_stream(sock,
- stream_data->u.stream.stream_nr,
- stream_data->size,
- stream_data->u.stream.shm_fd,
- stream_data->u.stream.wakeup_fd, 1);
- if (ret)
- return ret;
- return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
-}
-
-
-/* Buffer operations */
-
-struct ustctl_consumer_channel *
- ustctl_create_channel(struct ustctl_consumer_channel_attr *attr)
-{
- struct ustctl_consumer_channel *chan;
- const char *transport_name;
- struct lttng_transport *transport;
-
- switch (attr->type) {
- case LTTNG_UST_CHAN_PER_CPU:
- if (attr->output == LTTNG_UST_MMAP) {
- transport_name = attr->overwrite ?
- "relay-overwrite-mmap" : "relay-discard-mmap";
- } else {
- return NULL;
- }
- break;
- case LTTNG_UST_CHAN_METADATA:
- if (attr->output == LTTNG_UST_MMAP)
- transport_name = "relay-metadata-mmap";
- else
- return NULL;
- break;
- default:
- transport_name = "<unknown>";
- return NULL;
- }
-
- transport = lttng_transport_find(transport_name);
- if (!transport) {
- DBG("LTTng transport %s not found\n",
- transport_name);
- return NULL;
- }
-
- chan = zmalloc(sizeof(*chan));
- if (!chan)
- return NULL;
-
- chan->chan = transport->ops.channel_create(transport_name, NULL,
- attr->subbuf_size, attr->num_subbuf,
- attr->switch_timer_interval,
- attr->read_timer_interval,
- attr->uuid);
- if (!chan->chan) {
- goto chan_error;
- }
- chan->chan->ops = &transport->ops;
- memcpy(&chan->attr, attr, sizeof(chan->attr));
- return chan;
-
-chan_error:
- free(chan);
- return NULL;
-}
-
-void ustctl_destroy_channel(struct ustctl_consumer_channel *chan)
-{
- chan->chan->ops->channel_destroy(chan->chan);
- free(chan);
-}
-
-int ustctl_send_channel_to_sessiond(int sock,
- struct ustctl_consumer_channel *channel)
-{
- struct shm_object_table *table;
-
- table = channel->chan->handle->table;
- if (table->size <= 0)
- return -EINVAL;
- return ustctl_send_channel(sock,
- channel->attr.type,
- table->objects[0].memory_map,
- table->objects[0].memory_map_size,
- 0);
-}
-
-int ustctl_send_stream_to_sessiond(int sock,
- struct ustctl_consumer_stream *stream)
-{
- if (!stream)
- return ustctl_send_stream(sock, -1U, -1U, -1, -1, 0);
-
- return ustctl_send_stream(sock,
- stream->cpu,
- stream->memory_map_size,
- stream->shm_fd, stream->wakeup_fd,
- 0);
-}
-
-int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream)
-{
- struct channel *chan;
-
- chan = stream->chan->chan->chan;
- return ring_buffer_close_wait_fd(&chan->backend.config,
- chan, stream->handle, stream->cpu);
-}
-
-int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream)
-{
- struct channel *chan;
-
- chan = stream->chan->chan->chan;
- return ring_buffer_close_wakeup_fd(&chan->backend.config,
- chan, stream->handle, stream->cpu);
-}
-
-struct ustctl_consumer_stream *
- ustctl_create_stream(struct ustctl_consumer_channel *channel,
- int cpu)
-{
- struct ustctl_consumer_stream *stream;
- struct lttng_ust_shm_handle *handle;
- struct channel *chan;
- int shm_fd, wait_fd, wakeup_fd;
- uint64_t memory_map_size;
- struct lttng_ust_lib_ring_buffer *buf;
- int ret;
-
- if (!channel)
- return NULL;
- handle = channel->chan->handle;
- if (!handle)
- return NULL;
-
- chan = channel->chan->chan;
- buf = channel_get_ring_buffer(&chan->backend.config,
- chan, cpu, handle, &shm_fd, &wait_fd,
- &wakeup_fd, &memory_map_size);
- if (!buf)
- return NULL;
- ret = lib_ring_buffer_open_read(buf, handle);
- if (ret)
- return NULL;
-
- stream = zmalloc(sizeof(*stream));
- if (!stream)
- goto alloc_error;
- stream->handle = handle;
- stream->buf = buf;
- stream->chan = channel;
- stream->shm_fd = shm_fd;
- stream->wait_fd = wait_fd;
- stream->wakeup_fd = wakeup_fd;
- stream->memory_map_size = memory_map_size;
- stream->cpu = cpu;
- return stream;
-
-alloc_error:
- return NULL;
-}
-
-void ustctl_destroy_stream(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- assert(stream);
- buf = stream->buf;
- consumer_chan = stream->chan;
- lib_ring_buffer_release_read(buf, consumer_chan->chan->handle);
- free(stream);
-}
-
-int ustctl_get_wait_fd(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref);
-}
-
-int ustctl_get_wakeup_fd(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- return shm_get_wakeup_fd(consumer_chan->chan->handle, &buf->self._ref);
-}
-
-/* For mmap mode, readable without "get" operation */
-
-void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return NULL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- return shmp(consumer_chan->chan->handle, buf->backend.memory_map);
-}
-
-/* returns the length to mmap. */
-int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream,
- unsigned long *len)
-{
- struct ustctl_consumer_channel *consumer_chan;
- unsigned long mmap_buf_len;
- struct channel *chan;
-
- if (!stream)
- return -EINVAL;
- consumer_chan = stream->chan;
- chan = consumer_chan->chan->chan;
- if (chan->backend.config.output != RING_BUFFER_MMAP)
- return -EINVAL;
- mmap_buf_len = chan->backend.buf_size;
- if (chan->backend.extra_reader_sb)
- mmap_buf_len += chan->backend.subbuf_size;
- if (mmap_buf_len > INT_MAX)
- return -EFBIG;
- *len = mmap_buf_len;
- return 0;
-}
-
-/* returns the maximum size for sub-buffers. */
-int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream,
- unsigned long *len)
-{
- struct ustctl_consumer_channel *consumer_chan;
- struct channel *chan;
-
- if (!stream)
- return -EINVAL;
- consumer_chan = stream->chan;
- chan = consumer_chan->chan->chan;
- *len = chan->backend.subbuf_size;
- return 0;
-}
-
-/*
- * For mmap mode, operate on the current packet (between get/put or
- * get_next/put_next).
- */
-
-/* returns the offset of the subbuffer belonging to the mmap reader. */
-int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream,
- unsigned long *off)
-{
- struct channel *chan;
- unsigned long sb_bindex;
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- chan = consumer_chan->chan->chan;
- if (chan->backend.config.output != RING_BUFFER_MMAP)
- return -EINVAL;
- sb_bindex = subbuffer_id_get_index(&chan->backend.config,
- buf->backend.buf_rsb.id);
- *off = shmp(consumer_chan->chan->handle,
- shmp_index(consumer_chan->chan->handle, buf->backend.array, sb_bindex)->shmp)->mmap_offset;
- return 0;
-}
-
-/* returns the size of the current sub-buffer, without padding (for mmap). */
-int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream,
- unsigned long *len)
-{
- struct ustctl_consumer_channel *consumer_chan;
- struct channel *chan;
- struct lttng_ust_lib_ring_buffer *buf;
-
- if (!stream)
- return -EINVAL;
-
- buf = stream->buf;
- consumer_chan = stream->chan;
- chan = consumer_chan->chan->chan;
- *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf,
- consumer_chan->chan->handle);
- return 0;
-}
-
-/* returns the size of the current sub-buffer, without padding (for mmap). */
-int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream,
- unsigned long *len)
-{
- struct ustctl_consumer_channel *consumer_chan;
- struct channel *chan;
- struct lttng_ust_lib_ring_buffer *buf;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- chan = consumer_chan->chan->chan;
- *len = lib_ring_buffer_get_read_data_size(&chan->backend.config, buf,
- consumer_chan->chan->handle);
- *len = PAGE_ALIGN(*len);
- return 0;
-}
-
-/* Get exclusive read access to the next sub-buffer that can be read. */
-int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- return lib_ring_buffer_get_next_subbuf(buf,
- consumer_chan->chan->handle);
-}
-
-
-/* Release exclusive sub-buffer access, move consumer forward. */
-int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- lib_ring_buffer_put_next_subbuf(buf, consumer_chan->chan->handle);
- return 0;
-}
-
-/* snapshot */
-
-/* Get a snapshot of the current ring buffer producer and consumer positions */
-int ustctl_snapshot(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- return lib_ring_buffer_snapshot(buf, &buf->cons_snapshot,
- &buf->prod_snapshot, consumer_chan->chan->handle);
-}
-
-/* Get the consumer position (iteration start) */
-int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream,
- unsigned long *pos)
-{
- struct lttng_ust_lib_ring_buffer *buf;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- *pos = buf->cons_snapshot;
- return 0;
-}
-
-/* Get the producer position (iteration end) */
-int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream,
- unsigned long *pos)
-{
- struct lttng_ust_lib_ring_buffer *buf;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- *pos = buf->prod_snapshot;
- return 0;
-}
-
-/* Get exclusive read access to the specified sub-buffer position */
-int ustctl_get_subbuf(struct ustctl_consumer_stream *stream,
- unsigned long *pos)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- return lib_ring_buffer_get_subbuf(buf, *pos,
- consumer_chan->chan->handle);
-}
-
-/* Release exclusive sub-buffer access */
-int ustctl_put_subbuf(struct ustctl_consumer_stream *stream)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- if (!stream)
- return -EINVAL;
- buf = stream->buf;
- consumer_chan = stream->chan;
- lib_ring_buffer_put_subbuf(buf, consumer_chan->chan->handle);
- return 0;
-}
-
-void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
- int producer_active)
-{
- struct lttng_ust_lib_ring_buffer *buf;
- struct ustctl_consumer_channel *consumer_chan;
-
- assert(stream);
- buf = stream->buf;
- consumer_chan = stream->chan;
- lib_ring_buffer_switch_slow(buf,
- producer_active ? SWITCH_ACTIVE : SWITCH_FLUSH,
- consumer_chan->chan->handle);
-}
-
-static __attribute__((constructor))
-void ustctl_init(void)
-{
- init_usterr();
- lttng_ring_buffer_metadata_client_init();
- lttng_ring_buffer_client_overwrite_init();
- lttng_ring_buffer_client_discard_init();
-}
-
-static __attribute__((destructor))
-void ustctl_exit(void)
-{
- lttng_ring_buffer_client_discard_exit();
- lttng_ring_buffer_client_overwrite_exit();
- lttng_ring_buffer_metadata_client_exit();
-}
projects / lttng-ust.git / blobdiff