#define _GNU_SOURCE
#include <string.h>
+#include <lttng/ust-config.h>
#include <lttng/ust-ctl.h>
#include <lttng/ust-abi.h>
#include <lttng/ust-events.h>
#include <sys/mman.h>
+#include <byteswap.h>
#include <usterr-signal-safe.h>
#include <ust-comm.h>
#include "../libringbuffer/backend.h"
#include "../libringbuffer/frontend.h"
+#include "../liblttng-ust/wait.h"
+#include "../liblttng-ust/lttng-rb-clients.h"
+#include "../liblttng-ust/clock.h"
+
+/*
+ * Number of milliseconds to retry before failing metadata writes on
+ * buffer full condition. (10 seconds)
+ */
+#define LTTNG_METADATA_TIMEOUT_MSEC 10000
/*
* Channel representation within consumer.
/* initial attributes */
struct ustctl_consumer_channel_attr attr;
+ int wait_fd; /* monitor close() */
+ int wakeup_fd; /* monitor close() */
};
/*
};
extern void lttng_ring_buffer_client_overwrite_init(void);
+extern void lttng_ring_buffer_client_overwrite_rt_init(void);
extern void lttng_ring_buffer_client_discard_init(void);
+extern void lttng_ring_buffer_client_discard_rt_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_overwrite_rt_exit(void);
extern void lttng_ring_buffer_client_discard_exit(void);
+extern void lttng_ring_buffer_client_discard_rt_exit(void);
extern void lttng_ring_buffer_metadata_client_exit(void);
volatile enum ust_loglevel ust_loglevel;
switch (data->type) {
case LTTNG_UST_OBJECT_TYPE_CHANNEL:
+ if (data->u.channel.wakeup_fd >= 0) {
+ ret = close(data->u.channel.wakeup_fd);
+ if (ret < 0) {
+ ret = -errno;
+ return ret;
+ }
+ }
free(data->u.channel.data);
break;
case LTTNG_UST_OBJECT_TYPE_STREAM:
}
}
break;
+ case LTTNG_UST_OBJECT_TYPE_EVENT:
+ case LTTNG_UST_OBJECT_TYPE_CONTEXT:
+ break;
default:
assert(0);
}
event_data = zmalloc(sizeof(*event_data));
if (!event_data)
return -ENOMEM;
+ event_data->type = LTTNG_UST_OBJECT_TYPE_EVENT;
memset(&lum, 0, sizeof(lum));
lum.handle = channel_data->handle;
lum.cmd = LTTNG_UST_EVENT;
return 0;
}
-int ustctl_add_context(int sock, struct lttng_ust_context *ctx,
+int ustctl_add_context(int sock, struct lttng_ust_context_attr *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;
+ struct lttng_ust_object_data *context_data = NULL;
+ char *buf = NULL;
+ size_t len;
int ret;
- if (!obj_data || !_context_data)
- return -EINVAL;
+ if (!obj_data || !_context_data) {
+ ret = -EINVAL;
+ goto end;
+ }
context_data = zmalloc(sizeof(*context_data));
- if (!context_data)
- return -ENOMEM;
+ if (!context_data) {
+ ret = -ENOMEM;
+ goto end;
+ }
+ context_data->type = LTTNG_UST_OBJECT_TYPE_CONTEXT;
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;
+ switch (ctx->ctx) {
+ case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER:
+ lum.u.context.u.perf_counter = ctx->u.perf_counter;
+ break;
+ case LTTNG_UST_CONTEXT_APP_CONTEXT:
+ {
+ size_t provider_name_len = strlen(
+ ctx->u.app_ctx.provider_name) + 1;
+ size_t ctx_name_len = strlen(ctx->u.app_ctx.ctx_name) + 1;
+
+ lum.u.context.u.app_ctx.provider_name_len = provider_name_len;
+ lum.u.context.u.app_ctx.ctx_name_len = ctx_name_len;
+
+ len = provider_name_len + ctx_name_len;
+ buf = zmalloc(len);
+ if (!buf) {
+ ret = -ENOMEM;
+ goto end;
+ }
+ memcpy(buf, ctx->u.app_ctx.provider_name,
+ provider_name_len);
+ memcpy(buf + provider_name_len, ctx->u.app_ctx.ctx_name,
+ ctx_name_len);
+ break;
+ }
+ default:
+ break;
}
- context_data->handle = lur.ret_val;
- DBG("received context handle %u", context_data->handle);
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret)
+ goto end;
+ if (buf) {
+ /* send var len ctx_name */
+ ret = ustcomm_send_unix_sock(sock, buf, len);
+ if (ret < 0) {
+ goto end;
+ }
+ if (ret != len) {
+ ret = -EINVAL;
+ goto end;
+ }
+ }
+ ret = ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
+ if (ret < 0) {
+ goto end;
+ }
+ context_data->handle = -1;
+ DBG("Context created successfully");
*_context_data = context_data;
+ context_data = NULL;
+end:
+ free(context_data);
+ free(buf);
return ret;
}
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 ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
}
+int ustctl_set_exclusion(int sock, struct lttng_ust_event_exclusion *exclusion,
+ 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_EXCLUSION;
+ lum.u.exclusion.count = exclusion->count;
+
+ ret = ustcomm_send_app_msg(sock, &lum);
+ if (ret) {
+ return ret;
+ }
+
+ /* send var len exclusion names */
+ ret = ustcomm_send_unix_sock(sock,
+ exclusion->names,
+ exclusion->count * LTTNG_UST_SYM_NAME_LEN);
+ if (ret < 0) {
+ return ret;
+ }
+ if (ret != exclusion->count * LTTNG_UST_SYM_NAME_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)
{
enum lttng_ust_chan_type type,
void *data,
uint64_t size,
+ int wakeup_fd,
int send_fd_only)
{
ssize_t len;
return -EIO;
}
+ /* Send wakeup fd */
+ len = ustcomm_send_fds_unix_sock(sock, &wakeup_fd, 1);
+ if (len <= 0) {
+ if (len < 0)
+ return len;
+ else
+ return -EIO;
+ }
return 0;
}
{
struct lttng_ust_object_data *channel_data;
ssize_t len;
+ int wakeup_fd;
int ret;
channel_data = zmalloc(sizeof(*channel_data));
goto error_alloc;
}
channel_data->type = LTTNG_UST_OBJECT_TYPE_CHANNEL;
+ channel_data->handle = -1;
/* recv mmap size */
len = ustcomm_recv_unix_sock(sock, &channel_data->size,
ret = -EINVAL;
goto error_recv_data;
}
-
+ /* recv wakeup fd */
+ len = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1);
+ if (len <= 0) {
+ if (len < 0) {
+ ret = len;
+ goto error_recv_data;
+ } else {
+ ret = -EIO;
+ goto error_recv_data;
+ }
+ }
+ channel_data->u.channel.wakeup_fd = wakeup_fd;
*_channel_data = channel_data;
return 0;
channel_data->u.channel.type,
channel_data->u.channel.data,
channel_data->size,
+ channel_data->u.channel.wakeup_fd,
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;
- }
+ channel_data->handle = lur.ret_val;
}
return ret;
}
return ustcomm_recv_app_reply(sock, &lur, lum.handle, lum.cmd);
}
+int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest,
+ struct lttng_ust_object_data *src)
+{
+ struct lttng_ust_object_data *obj;
+ int ret;
+
+ if (src->handle != -1) {
+ ret = -EINVAL;
+ goto error;
+ }
+
+ obj = zmalloc(sizeof(*obj));
+ if (!obj) {
+ ret = -ENOMEM;
+ goto error;
+ }
+
+ obj->type = src->type;
+ obj->handle = src->handle;
+ obj->size = src->size;
+
+ switch (obj->type) {
+ case LTTNG_UST_OBJECT_TYPE_CHANNEL:
+ {
+ obj->u.channel.type = src->u.channel.type;
+ if (src->u.channel.wakeup_fd >= 0) {
+ obj->u.channel.wakeup_fd =
+ dup(src->u.channel.wakeup_fd);
+ if (obj->u.channel.wakeup_fd < 0) {
+ ret = errno;
+ goto chan_error_wakeup_fd;
+ }
+ } else {
+ obj->u.channel.wakeup_fd =
+ src->u.channel.wakeup_fd;
+ }
+ obj->u.channel.data = zmalloc(obj->size);
+ if (!obj->u.channel.data) {
+ ret = -ENOMEM;
+ goto chan_error_alloc;
+ }
+ memcpy(obj->u.channel.data, src->u.channel.data, obj->size);
+ break;
+
+ chan_error_alloc:
+ if (src->u.channel.wakeup_fd >= 0) {
+ int closeret;
+
+ closeret = close(obj->u.channel.wakeup_fd);
+ if (closeret) {
+ PERROR("close");
+ }
+ }
+ chan_error_wakeup_fd:
+ goto error_type;
+
+ }
+
+ case LTTNG_UST_OBJECT_TYPE_STREAM:
+ {
+ obj->u.stream.stream_nr = src->u.stream.stream_nr;
+ if (src->u.stream.wakeup_fd >= 0) {
+ obj->u.stream.wakeup_fd =
+ dup(src->u.stream.wakeup_fd);
+ if (obj->u.stream.wakeup_fd < 0) {
+ ret = errno;
+ goto stream_error_wakeup_fd;
+ }
+ } else {
+ obj->u.stream.wakeup_fd =
+ src->u.stream.wakeup_fd;
+ }
+
+ if (src->u.stream.shm_fd >= 0) {
+ obj->u.stream.shm_fd =
+ dup(src->u.stream.shm_fd);
+ if (obj->u.stream.shm_fd < 0) {
+ ret = errno;
+ goto stream_error_shm_fd;
+ }
+ } else {
+ obj->u.stream.shm_fd =
+ src->u.stream.shm_fd;
+ }
+ break;
+
+ stream_error_shm_fd:
+ if (src->u.stream.wakeup_fd >= 0) {
+ int closeret;
+
+ closeret = close(obj->u.stream.wakeup_fd);
+ if (closeret) {
+ PERROR("close");
+ }
+ }
+ stream_error_wakeup_fd:
+ goto error_type;
+ }
+
+ default:
+ ret = -EINVAL;
+ goto error_type;
+ }
+
+ *dest = obj;
+ return 0;
+
+error_type:
+ free(obj);
+error:
+ return ret;
+}
+
/* Buffer operations */
+int ustctl_get_nr_stream_per_channel(void)
+{
+ return num_possible_cpus();
+}
+
struct ustctl_consumer_channel *
- ustctl_create_channel(struct ustctl_consumer_channel_attr *attr)
+ ustctl_create_channel(struct ustctl_consumer_channel_attr *attr,
+ const int *stream_fds, int nr_stream_fds)
{
struct ustctl_consumer_channel *chan;
const char *transport_name;
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";
+ if (attr->overwrite) {
+ if (attr->read_timer_interval == 0) {
+ transport_name = "relay-overwrite-mmap";
+ } else {
+ transport_name = "relay-overwrite-rt-mmap";
+ }
+ } else {
+ if (attr->read_timer_interval == 0) {
+ transport_name = "relay-discard-mmap";
+ } else {
+ transport_name = "relay-discard-rt-mmap";
+ }
+ }
} else {
return NULL;
}
transport = lttng_transport_find(transport_name);
if (!transport) {
DBG("LTTng transport %s not found\n",
- transport_name);
+ transport_name);
return NULL;
}
return NULL;
chan->chan = transport->ops.channel_create(transport_name, NULL,
- attr->subbuf_size, attr->num_subbuf,
+ attr->subbuf_size, attr->num_subbuf,
attr->switch_timer_interval,
- attr->read_timer_interval,
- attr->uuid);
+ attr->read_timer_interval,
+ attr->uuid, attr->chan_id,
+ stream_fds, nr_stream_fds);
if (!chan->chan) {
goto chan_error;
}
chan->chan->ops = &transport->ops;
memcpy(&chan->attr, attr, sizeof(chan->attr));
+ chan->wait_fd = ustctl_channel_get_wait_fd(chan);
+ chan->wakeup_fd = ustctl_channel_get_wakeup_fd(chan);
return chan;
chan_error:
void ustctl_destroy_channel(struct ustctl_consumer_channel *chan)
{
+ (void) ustctl_channel_close_wait_fd(chan);
+ (void) ustctl_channel_close_wakeup_fd(chan);
chan->chan->ops->channel_destroy(chan->chan);
free(chan);
}
channel->attr.type,
table->objects[0].memory_map,
table->objects[0].memory_map_size,
+ channel->wakeup_fd,
0);
}
0);
}
+int ustctl_write_metadata_to_channel(
+ struct ustctl_consumer_channel *channel,
+ const char *metadata_str, /* NOT null-terminated */
+ size_t len) /* metadata length */
+{
+ struct lttng_ust_lib_ring_buffer_ctx ctx;
+ struct lttng_channel *chan = channel->chan;
+ const char *str = metadata_str;
+ int ret = 0, waitret;
+ size_t reserve_len, pos;
+
+ for (pos = 0; pos < len; pos += reserve_len) {
+ reserve_len = min_t(size_t,
+ chan->ops->packet_avail_size(chan->chan, chan->handle),
+ len - pos);
+ lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len,
+ sizeof(char), -1, chan->handle, NULL);
+ /*
+ * We don't care about metadata buffer's records lost
+ * count, because we always retry here. Report error if
+ * we need to bail out after timeout or being
+ * interrupted.
+ */
+ waitret = wait_cond_interruptible_timeout(
+ ({
+ ret = chan->ops->event_reserve(&ctx, 0);
+ ret != -ENOBUFS || !ret;
+ }),
+ LTTNG_METADATA_TIMEOUT_MSEC);
+ if (waitret == -ETIMEDOUT || waitret == -EINTR || ret) {
+ DBG("LTTng: Failure to write metadata to buffers (%s)\n",
+ waitret == -EINTR ? "interrupted" :
+ (ret == -ENOBUFS ? "timeout" : "I/O error"));
+ if (waitret == -EINTR)
+ ret = waitret;
+ goto end;
+ }
+ chan->ops->event_write(&ctx, &str[pos], reserve_len);
+ chan->ops->event_commit(&ctx);
+ }
+end:
+ return ret;
+}
+
+/*
+ * Write at most one packet in the channel.
+ * Returns the number of bytes written on success, < 0 on error.
+ */
+ssize_t ustctl_write_one_packet_to_channel(
+ struct ustctl_consumer_channel *channel,
+ const char *metadata_str, /* NOT null-terminated */
+ size_t len) /* metadata length */
+{
+ struct lttng_ust_lib_ring_buffer_ctx ctx;
+ struct lttng_channel *chan = channel->chan;
+ const char *str = metadata_str;
+ ssize_t reserve_len;
+ int ret;
+
+ reserve_len = min_t(ssize_t,
+ chan->ops->packet_avail_size(chan->chan, chan->handle),
+ len);
+ lib_ring_buffer_ctx_init(&ctx, chan->chan, NULL, reserve_len,
+ sizeof(char), -1, chan->handle, NULL);
+ ret = chan->ops->event_reserve(&ctx, 0);
+ if (ret != 0) {
+ DBG("LTTng: event reservation failed");
+ assert(ret < 0);
+ reserve_len = ret;
+ goto end;
+ }
+ chan->ops->event_write(&ctx, str, reserve_len);
+ chan->ops->event_commit(&ctx);
+
+end:
+ return reserve_len;
+}
+
+int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan)
+{
+ struct channel *chan;
+ int ret;
+
+ chan = consumer_chan->chan->chan;
+ ret = ring_buffer_channel_close_wait_fd(&chan->backend.config,
+ chan, chan->handle);
+ if (!ret)
+ consumer_chan->wait_fd = -1;
+ return ret;
+}
+
+int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan)
+{
+ struct channel *chan;
+ int ret;
+
+ chan = consumer_chan->chan->chan;
+ ret = ring_buffer_channel_close_wakeup_fd(&chan->backend.config,
+ chan, chan->handle);
+ if (!ret)
+ consumer_chan->wakeup_fd = -1;
+ return ret;
+}
+
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,
+ return ring_buffer_stream_close_wait_fd(&chan->backend.config,
chan, stream->handle, stream->cpu);
}
struct channel *chan;
chan = stream->chan->chan->chan;
- return ring_buffer_close_wakeup_fd(&chan->backend.config,
+ return ring_buffer_stream_close_wakeup_fd(&chan->backend.config,
chan, stream->handle, stream->cpu);
}
assert(stream);
buf = stream->buf;
consumer_chan = stream->chan;
+ (void) ustctl_stream_close_wait_fd(stream);
+ (void) ustctl_stream_close_wakeup_fd(stream);
lib_ring_buffer_release_read(buf, consumer_chan->chan->handle);
free(stream);
}
-int ustctl_get_wait_fd(struct ustctl_consumer_stream *stream)
+int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *chan)
+{
+ if (!chan)
+ return -EINVAL;
+ return shm_get_wait_fd(chan->chan->handle,
+ &chan->chan->handle->chan._ref);
+}
+
+int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *chan)
+{
+ if (!chan)
+ return -EINVAL;
+ return shm_get_wakeup_fd(chan->chan->handle,
+ &chan->chan->handle->chan._ref);
+}
+
+int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream)
{
struct lttng_ust_lib_ring_buffer *buf;
struct ustctl_consumer_channel *consumer_chan;
return shm_get_wait_fd(consumer_chan->chan->handle, &buf->self._ref);
}
-int ustctl_get_wakeup_fd(struct ustctl_consumer_stream *stream)
+int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream)
{
struct lttng_ust_lib_ring_buffer *buf;
struct ustctl_consumer_channel *consumer_chan;
unsigned long sb_bindex;
struct lttng_ust_lib_ring_buffer *buf;
struct ustctl_consumer_channel *consumer_chan;
+ struct lttng_ust_lib_ring_buffer_backend_pages_shmp *barray_idx;
+ struct lttng_ust_lib_ring_buffer_backend_pages *pages;
if (!stream)
return -EINVAL;
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;
+ buf->backend.buf_rsb.id);
+ barray_idx = shmp_index(consumer_chan->chan->handle, buf->backend.array,
+ sb_bindex);
+ if (!barray_idx)
+ return -EINVAL;
+ pages = shmp(consumer_chan->chan->handle, barray_idx->shmp);
+ if (!pages)
+ return -EINVAL;
+ *off = pages->mmap_offset;
return 0;
}
consumer_chan->chan->handle);
}
+static
+struct lttng_ust_client_lib_ring_buffer_client_cb *get_client_cb(
+ struct lttng_ust_lib_ring_buffer *buf,
+ struct lttng_ust_shm_handle *handle)
+{
+ struct channel *chan;
+ const struct lttng_ust_lib_ring_buffer_config *config;
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+
+ chan = shmp(handle, buf->backend.chan);
+ if (!chan)
+ return NULL;
+ config = &chan->backend.config;
+ if (!config->cb_ptr)
+ return NULL;
+ client_cb = caa_container_of(config->cb_ptr,
+ struct lttng_ust_client_lib_ring_buffer_client_cb,
+ parent);
+ return client_cb;
+}
+
+int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream,
+ uint64_t *timestamp_begin)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !timestamp_begin)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->timestamp_begin(buf, handle, timestamp_begin);
+}
+
+int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream,
+ uint64_t *timestamp_end)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !timestamp_end)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->timestamp_end(buf, handle, timestamp_end);
+}
+
+int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream,
+ uint64_t *events_discarded)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !events_discarded)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->events_discarded(buf, handle, events_discarded);
+}
+
+int ustctl_get_content_size(struct ustctl_consumer_stream *stream,
+ uint64_t *content_size)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !content_size)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->content_size(buf, handle, content_size);
+}
+
+int ustctl_get_packet_size(struct ustctl_consumer_stream *stream,
+ uint64_t *packet_size)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !packet_size)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->packet_size(buf, handle, packet_size);
+}
+
+int ustctl_get_stream_id(struct ustctl_consumer_stream *stream,
+ uint64_t *stream_id)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !stream_id)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->stream_id(buf, handle, stream_id);
+}
+
+int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
+ uint64_t *ts)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !ts)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb || !client_cb->current_timestamp)
+ return -ENOSYS;
+ return client_cb->current_timestamp(buf, handle, ts);
+}
+
+int ustctl_get_sequence_number(struct ustctl_consumer_stream *stream,
+ uint64_t *seq)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !seq)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb || !client_cb->sequence_number)
+ return -ENOSYS;
+ return client_cb->sequence_number(buf, handle, seq);
+}
+
+int ustctl_get_instance_id(struct ustctl_consumer_stream *stream,
+ uint64_t *id)
+{
+ struct lttng_ust_client_lib_ring_buffer_client_cb *client_cb;
+ struct lttng_ust_lib_ring_buffer *buf;
+ struct lttng_ust_shm_handle *handle;
+
+ if (!stream || !id)
+ return -EINVAL;
+ buf = stream->buf;
+ handle = stream->chan->chan->handle;
+ client_cb = get_client_cb(buf, handle);
+ if (!client_cb)
+ return -ENOSYS;
+ return client_cb->instance_id(buf, handle, id);
+}
+
+#ifdef LTTNG_UST_HAVE_PERF_EVENT
+
+int ustctl_has_perf_counters(void)
+{
+ return 1;
+}
+
+#else
+
+int ustctl_has_perf_counters(void)
+{
+ return 0;
+}
+
+#endif
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_recv_reg_msg(int sock,
+ enum ustctl_socket_type *type,
+ uint32_t *major,
+ uint32_t *minor,
+ uint32_t *pid,
+ uint32_t *ppid,
+ uint32_t *uid,
+ uint32_t *gid,
+ uint32_t *bits_per_long,
+ uint32_t *uint8_t_alignment,
+ uint32_t *uint16_t_alignment,
+ uint32_t *uint32_t_alignment,
+ uint32_t *uint64_t_alignment,
+ uint32_t *long_alignment,
+ int *byte_order,
+ char *name)
+{
+ ssize_t len;
+ struct ustctl_reg_msg reg_msg;
+
+ len = ustcomm_recv_unix_sock(sock, ®_msg, sizeof(reg_msg));
+ if (len > 0 && len != sizeof(reg_msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ if (reg_msg.magic == LTTNG_UST_COMM_MAGIC) {
+ *byte_order = BYTE_ORDER == BIG_ENDIAN ?
+ BIG_ENDIAN : LITTLE_ENDIAN;
+ } else if (reg_msg.magic == bswap_32(LTTNG_UST_COMM_MAGIC)) {
+ *byte_order = BYTE_ORDER == BIG_ENDIAN ?
+ LITTLE_ENDIAN : BIG_ENDIAN;
+ } else {
+ return -LTTNG_UST_ERR_INVAL_MAGIC;
+ }
+ switch (reg_msg.socket_type) {
+ case 0: *type = USTCTL_SOCKET_CMD;
+ break;
+ case 1: *type = USTCTL_SOCKET_NOTIFY;
+ break;
+ default:
+ return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE;
+ }
+ *major = reg_msg.major;
+ *minor = reg_msg.minor;
+ *pid = reg_msg.pid;
+ *ppid = reg_msg.ppid;
+ *uid = reg_msg.uid;
+ *gid = reg_msg.gid;
+ *bits_per_long = reg_msg.bits_per_long;
+ *uint8_t_alignment = reg_msg.uint8_t_alignment;
+ *uint16_t_alignment = reg_msg.uint16_t_alignment;
+ *uint32_t_alignment = reg_msg.uint32_t_alignment;
+ *uint64_t_alignment = reg_msg.uint64_t_alignment;
+ *long_alignment = reg_msg.long_alignment;
+ memcpy(name, reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN);
+ if (reg_msg.major != LTTNG_UST_ABI_MAJOR_VERSION) {
+ return -LTTNG_UST_ERR_UNSUP_MAJOR;
+ }
+
+ return 0;
+}
+
+int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd)
+{
+ struct ustcomm_notify_hdr header;
+ ssize_t len;
+
+ len = ustcomm_recv_unix_sock(sock, &header, sizeof(header));
+ if (len > 0 && len != sizeof(header))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+ switch (header.notify_cmd) {
+ case 0:
+ *notify_cmd = USTCTL_NOTIFY_CMD_EVENT;
+ break;
+ case 1:
+ *notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL;
+ break;
+ case 2:
+ *notify_cmd = USTCTL_NOTIFY_CMD_ENUM;
+ break;
+ default:
+ return -EINVAL;
+ }
+ return 0;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_recv_register_event(int sock,
+ int *session_objd,
+ int *channel_objd,
+ char *event_name,
+ int *loglevel,
+ char **signature,
+ size_t *nr_fields,
+ struct ustctl_field **fields,
+ char **model_emf_uri)
+{
+ ssize_t len;
+ struct ustcomm_notify_event_msg msg;
+ size_t signature_len, fields_len, model_emf_uri_len;
+ char *a_sign = NULL, *a_model_emf_uri = NULL;
+ struct ustctl_field *a_fields = NULL;
+
+ len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ *session_objd = msg.session_objd;
+ *channel_objd = msg.channel_objd;
+ strncpy(event_name, msg.event_name, LTTNG_UST_SYM_NAME_LEN);
+ event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ *loglevel = msg.loglevel;
+ signature_len = msg.signature_len;
+ fields_len = msg.fields_len;
+
+ if (fields_len % sizeof(*a_fields) != 0) {
+ return -EINVAL;
+ }
+
+ model_emf_uri_len = msg.model_emf_uri_len;
+
+ /* recv signature. contains at least \0. */
+ a_sign = zmalloc(signature_len);
+ if (!a_sign)
+ return -ENOMEM;
+ len = ustcomm_recv_unix_sock(sock, a_sign, signature_len);
+ if (len > 0 && len != signature_len) {
+ len = -EIO;
+ goto signature_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto signature_error;
+ }
+ if (len < 0) {
+ goto signature_error;
+ }
+ /* Enforce end of string */
+ a_sign[signature_len - 1] = '\0';
+
+ /* recv fields */
+ if (fields_len) {
+ a_fields = zmalloc(fields_len);
+ if (!a_fields) {
+ len = -ENOMEM;
+ goto signature_error;
+ }
+ len = ustcomm_recv_unix_sock(sock, a_fields, fields_len);
+ if (len > 0 && len != fields_len) {
+ len = -EIO;
+ goto fields_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto fields_error;
+ }
+ if (len < 0) {
+ goto fields_error;
+ }
+ }
+
+ if (model_emf_uri_len) {
+ /* recv model_emf_uri_len */
+ a_model_emf_uri = zmalloc(model_emf_uri_len);
+ if (!a_model_emf_uri) {
+ len = -ENOMEM;
+ goto fields_error;
+ }
+ len = ustcomm_recv_unix_sock(sock, a_model_emf_uri,
+ model_emf_uri_len);
+ if (len > 0 && len != model_emf_uri_len) {
+ len = -EIO;
+ goto model_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto model_error;
+ }
+ if (len < 0) {
+ goto model_error;
+ }
+ /* Enforce end of string */
+ a_model_emf_uri[model_emf_uri_len - 1] = '\0';
+ }
+
+ *signature = a_sign;
+ *nr_fields = fields_len / sizeof(*a_fields);
+ *fields = a_fields;
+ *model_emf_uri = a_model_emf_uri;
+
+ return 0;
+
+model_error:
+ free(a_model_emf_uri);
+fields_error:
+ free(a_fields);
+signature_error:
+ free(a_sign);
+ return len;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_event(int sock,
+ uint32_t id,
+ int ret_code)
+{
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_event_reply r;
+ } reply;
+
+ memset(&reply, 0, sizeof(reply));
+ reply.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT;
+ reply.r.ret_code = ret_code;
+ reply.r.event_id = id;
+ len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply));
+ if (len > 0 && len != sizeof(reply))
+ return -EIO;
+ if (len < 0)
+ return len;
+ return 0;
+}
+
+/*
+ * Returns 0 on success, negative UST or system error value on error.
+ */
+int ustctl_recv_register_enum(int sock,
+ int *session_objd,
+ char *enum_name,
+ struct ustctl_enum_entry **entries,
+ size_t *nr_entries)
+{
+ ssize_t len;
+ struct ustcomm_notify_enum_msg msg;
+ size_t entries_len;
+ struct ustctl_enum_entry *a_entries = NULL;
+
+ len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ *session_objd = msg.session_objd;
+ strncpy(enum_name, msg.enum_name, LTTNG_UST_SYM_NAME_LEN);
+ enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
+ entries_len = msg.entries_len;
+
+ if (entries_len % sizeof(*a_entries) != 0) {
+ return -EINVAL;
+ }
+
+ /* recv entries */
+ if (entries_len) {
+ a_entries = zmalloc(entries_len);
+ if (!a_entries)
+ return -ENOMEM;
+ len = ustcomm_recv_unix_sock(sock, a_entries, entries_len);
+ if (len > 0 && len != entries_len) {
+ len = -EIO;
+ goto entries_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto entries_error;
+ }
+ if (len < 0) {
+ goto entries_error;
+ }
+ }
+ *nr_entries = entries_len / sizeof(*a_entries);
+ *entries = a_entries;
+
+ return 0;
+
+entries_error:
+ free(a_entries);
+ return len;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_enum(int sock,
+ uint64_t id,
+ int ret_code)
+{
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_enum_reply r;
+ } reply;
+
+ memset(&reply, 0, sizeof(reply));
+ reply.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM;
+ reply.r.ret_code = ret_code;
+ reply.r.enum_id = id;
+ len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply));
+ if (len > 0 && len != sizeof(reply))
+ return -EIO;
+ if (len < 0)
+ return len;
+ return 0;
+}
+
+/*
+ * Returns 0 on success, negative UST or system error value on error.
+ */
+int ustctl_recv_register_channel(int sock,
+ int *session_objd, /* session descriptor (output) */
+ int *channel_objd, /* channel descriptor (output) */
+ size_t *nr_fields,
+ struct ustctl_field **fields)
+{
+ ssize_t len;
+ struct ustcomm_notify_channel_msg msg;
+ size_t fields_len;
+ struct ustctl_field *a_fields;
+
+ len = ustcomm_recv_unix_sock(sock, &msg, sizeof(msg));
+ if (len > 0 && len != sizeof(msg))
+ return -EIO;
+ if (len == 0)
+ return -EPIPE;
+ if (len < 0)
+ return len;
+
+ *session_objd = msg.session_objd;
+ *channel_objd = msg.channel_objd;
+ fields_len = msg.ctx_fields_len;
+
+ if (fields_len % sizeof(*a_fields) != 0) {
+ return -EINVAL;
+ }
+
+ /* recv fields */
+ if (fields_len) {
+ a_fields = zmalloc(fields_len);
+ if (!a_fields) {
+ len = -ENOMEM;
+ goto alloc_error;
+ }
+ len = ustcomm_recv_unix_sock(sock, a_fields, fields_len);
+ if (len > 0 && len != fields_len) {
+ len = -EIO;
+ goto fields_error;
+ }
+ if (len == 0) {
+ len = -EPIPE;
+ goto fields_error;
+ }
+ if (len < 0) {
+ goto fields_error;
+ }
+ *fields = a_fields;
+ } else {
+ *fields = NULL;
+ }
+ *nr_fields = fields_len / sizeof(*a_fields);
+ return 0;
+
+fields_error:
+ free(a_fields);
+alloc_error:
+ return len;
+}
+
+/*
+ * Returns 0 on success, negative error value on error.
+ */
+int ustctl_reply_register_channel(int sock,
+ uint32_t chan_id,
+ enum ustctl_channel_header header_type,
+ int ret_code)
+{
+ ssize_t len;
+ struct {
+ struct ustcomm_notify_hdr header;
+ struct ustcomm_notify_channel_reply r;
+ } reply;
+
+ memset(&reply, 0, sizeof(reply));
+ reply.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL;
+ reply.r.ret_code = ret_code;
+ reply.r.chan_id = chan_id;
+ switch (header_type) {
+ case USTCTL_CHANNEL_HEADER_COMPACT:
+ reply.r.header_type = 1;
+ break;
+ case USTCTL_CHANNEL_HEADER_LARGE:
+ reply.r.header_type = 2;
+ break;
+ default:
+ reply.r.header_type = 0;
+ break;
+ }
+ len = ustcomm_send_unix_sock(sock, &reply, sizeof(reply));
+ if (len > 0 && len != sizeof(reply))
+ return -EIO;
+ if (len < 0)
+ return len;
+ return 0;
+}
+
+/* Regenerate the statedump. */
+int ustctl_regenerate_statedump(int sock, int handle)
+{
+ struct ustcomm_ust_msg lum;
+ struct ustcomm_ust_reply lur;
+ int ret;
+
+ memset(&lum, 0, sizeof(lum));
+ lum.handle = handle;
+ lum.cmd = LTTNG_UST_SESSION_STATEDUMP;
+ ret = ustcomm_send_app_cmd(sock, &lum, &lur);
+ if (ret)
+ return ret;
+ DBG("Regenerated statedump for handle %u", handle);
+ return 0;
+}
+
static __attribute__((constructor))
void ustctl_init(void)
{
init_usterr();
+ lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */
+ lttng_ust_clock_init();
lttng_ring_buffer_metadata_client_init();
lttng_ring_buffer_client_overwrite_init();
+ lttng_ring_buffer_client_overwrite_rt_init();
lttng_ring_buffer_client_discard_init();
+ lttng_ring_buffer_client_discard_rt_init();
+ lib_ringbuffer_signal_init();
}
static __attribute__((destructor))
void ustctl_exit(void)
{
+ lttng_ring_buffer_client_discard_rt_exit();
lttng_ring_buffer_client_discard_exit();
+ lttng_ring_buffer_client_overwrite_rt_exit();
lttng_ring_buffer_client_overwrite_exit();
lttng_ring_buffer_metadata_client_exit();
}