* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
+#define _LGPL_SOURCE
#include <stdio.h>
#include <stdlib.h>
-#include <string.h>
#include <sys/stat.h>
#include <unistd.h>
+#include <inttypes.h>
#include <common/common.h>
#include <common/defaults.h>
-#include <common/sessiond-comm/sessiond-comm.h>
+#include <common/compat/string.h>
+#include "consumer.h"
+#include "health-sessiond.h"
#include "kernel-consumer.h"
+#include "notification-thread-commands.h"
+#include "session.h"
+#include "lttng-sessiond.h"
+
+static char *create_channel_path(struct consumer_output *consumer,
+ uid_t uid, gid_t gid)
+{
+ int ret;
+ char tmp_path[PATH_MAX];
+ char *pathname = NULL;
+
+ assert(consumer);
+
+ /* Get the right path name destination */
+ if (consumer->type == CONSUMER_DST_LOCAL) {
+ /* Set application path to the destination path */
+ ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s%s",
+ consumer->dst.session_root_path,
+ consumer->chunk_path,
+ consumer->subdir);
+ if (ret < 0) {
+ PERROR("snprintf kernel channel path");
+ goto error;
+ } else if (ret >= sizeof(tmp_path)) {
+ ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s%s\"",
+ sizeof(tmp_path), ret,
+ consumer->dst.session_root_path,
+ consumer->chunk_path,
+ consumer->subdir);
+ goto error;
+ }
+ pathname = lttng_strndup(tmp_path, sizeof(tmp_path));
+ if (!pathname) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+
+ /* Create directory */
+ ret = run_as_mkdir_recursive(pathname, S_IRWXU | S_IRWXG, uid, gid);
+ if (ret < 0) {
+ if (errno != EEXIST) {
+ ERR("Trace directory creation error");
+ goto error;
+ }
+ }
+ DBG3("Kernel local consumer tracefile path: %s", pathname);
+ } else {
+ ret = snprintf(tmp_path, sizeof(tmp_path), "%s%s",
+ consumer->dst.net.base_dir,
+ consumer->subdir);
+ if (ret < 0) {
+ PERROR("snprintf kernel metadata path");
+ goto error;
+ } else if (ret >= sizeof(tmp_path)) {
+ ERR("Kernel channel path exceeds the maximal allowed length of of %zu bytes (%i bytes required) with path \"%s%s\"",
+ sizeof(tmp_path), ret,
+ consumer->dst.net.base_dir,
+ consumer->subdir);
+ goto error;
+ }
+ pathname = lttng_strndup(tmp_path, sizeof(tmp_path));
+ if (!pathname) {
+ PERROR("lttng_strndup");
+ goto error;
+ }
+ DBG3("Kernel network consumer subdir path: %s", pathname);
+ }
+
+ return pathname;
+
+error:
+ free(pathname);
+ return NULL;
+}
/*
- * Send all stream fds of kernel channel to the consumer.
+ * Sending a single channel to the consumer with command ADD_CHANNEL.
*/
-int kernel_consumer_send_channel_stream(struct consumer_data *consumer_data,
- int sock, struct ltt_kernel_channel *channel, uid_t uid, gid_t gid)
+int kernel_consumer_add_channel(struct consumer_socket *sock,
+ struct ltt_kernel_channel *channel,
+ struct ltt_kernel_session *ksession,
+ unsigned int monitor)
{
- int ret, count = 0;
- struct ltt_kernel_stream *stream;
+ int ret;
+ char *pathname;
struct lttcomm_consumer_msg lkm;
+ struct consumer_output *consumer;
+ enum lttng_error_code status;
+ struct ltt_session *session = NULL;
+ struct lttng_channel_extended *channel_attr_extended;
- DBG("Sending streams of channel %s to kernel consumer",
+ /* Safety net */
+ assert(channel);
+ assert(ksession);
+ assert(ksession->consumer);
+
+ consumer = ksession->consumer;
+ channel_attr_extended = (struct lttng_channel_extended *)
+ channel->channel->attr.extended.ptr;
+
+ DBG("Kernel consumer adding channel %s to kernel consumer",
channel->channel->name);
- /* Send channel */
- lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
- lkm.u.channel.channel_key = channel->fd;
- lkm.u.channel.max_sb_size = channel->channel->attr.subbuf_size;
- lkm.u.channel.mmap_len = 0; /* for kernel */
- DBG("Sending channel %d to consumer", lkm.u.channel.channel_key);
- ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
+ if (monitor) {
+ pathname = create_channel_path(consumer, ksession->uid,
+ ksession->gid);
+ } else {
+ /* Empty path. */
+ pathname = strdup("");
+ }
+ if (!pathname) {
+ ret = -1;
+ goto error;
+ }
+
+ /* Prep channel message structure */
+ consumer_init_add_channel_comm_msg(&lkm,
+ channel->key,
+ ksession->id,
+ pathname,
+ ksession->uid,
+ ksession->gid,
+ consumer->net_seq_index,
+ channel->channel->name,
+ channel->stream_count,
+ channel->channel->attr.output,
+ CONSUMER_CHANNEL_TYPE_DATA,
+ channel->channel->attr.tracefile_size,
+ channel->channel->attr.tracefile_count,
+ monitor,
+ channel->channel->attr.live_timer_interval,
+ channel_attr_extended->monitor_timer_interval);
+
+ health_code_update();
+
+ ret = consumer_send_channel(sock, &lkm);
if (ret < 0) {
- PERROR("send consumer channel");
goto error;
}
- /* Send streams */
- cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
- if (!stream->fd) {
- continue;
- }
- /* Reset consumer message structure */
- memset(&lkm, 0, sizeof(lkm));
- lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM;
- lkm.u.stream.channel_key = channel->fd;
- lkm.u.stream.stream_key = stream->fd;
- lkm.u.stream.state = stream->state;
- lkm.u.stream.output = channel->channel->attr.output;
- lkm.u.stream.mmap_len = 0; /* for kernel */
- lkm.u.stream.uid = uid;
- lkm.u.stream.gid = gid;
- strncpy(lkm.u.stream.path_name, stream->pathname, PATH_MAX - 1);
- lkm.u.stream.path_name[PATH_MAX - 1] = '\0';
- count++;
-
- DBG("Sending stream %d to consumer", lkm.u.stream.stream_key);
- ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
- if (ret < 0) {
- PERROR("send consumer stream");
- goto error;
- }
- ret = lttcomm_send_fds_unix_sock(sock, &stream->fd, 1);
- if (ret < 0) {
- PERROR("send consumer stream ancillary data");
- goto error;
- }
+ health_code_update();
+ rcu_read_lock();
+ session = session_find_by_id(ksession->id);
+ assert(session);
+ assert(pthread_mutex_trylock(&session->lock));
+ assert(session_trylock_list());
+
+ status = notification_thread_command_add_channel(
+ notification_thread_handle, session->name,
+ ksession->uid, ksession->gid,
+ channel->channel->name, channel->key,
+ LTTNG_DOMAIN_KERNEL,
+ channel->channel->attr.subbuf_size * channel->channel->attr.num_subbuf);
+ rcu_read_unlock();
+ if (status != LTTNG_OK) {
+ ret = -1;
+ goto error;
}
- DBG("consumer channel streams sent");
+ channel->published_to_notification_thread = true;
- return 0;
+error:
+ if (session) {
+ session_put(session);
+ }
+ free(pathname);
+ return ret;
+}
+
+/*
+ * Sending metadata to the consumer with command ADD_CHANNEL and ADD_STREAM.
+ *
+ * The consumer socket lock must be held by the caller.
+ */
+int kernel_consumer_add_metadata(struct consumer_socket *sock,
+ struct ltt_kernel_session *ksession, unsigned int monitor)
+{
+ int ret;
+ char *pathname;
+ struct lttcomm_consumer_msg lkm;
+ struct consumer_output *consumer;
+ struct ltt_session *session = NULL;
+
+ rcu_read_lock();
+
+ /* Safety net */
+ assert(ksession);
+ assert(ksession->consumer);
+ assert(sock);
+
+ DBG("Sending metadata %d to kernel consumer",
+ ksession->metadata_stream_fd);
+
+ /* Get consumer output pointer */
+ consumer = ksession->consumer;
+
+ if (monitor) {
+ pathname = create_channel_path(consumer,
+ ksession->uid, ksession->gid);
+ } else {
+ /* Empty path. */
+ pathname = strdup("");
+ }
+ if (!pathname) {
+ ret = -1;
+ goto error;
+ }
+
+ session = session_find_by_id(ksession->id);
+ assert(session);
+ assert(pthread_mutex_trylock(&session->lock));
+ assert(session_trylock_list());
+
+ /* Prep channel message structure */
+ consumer_init_add_channel_comm_msg(&lkm,
+ ksession->metadata->key,
+ ksession->id,
+ pathname,
+ ksession->uid,
+ ksession->gid,
+ consumer->net_seq_index,
+ DEFAULT_METADATA_NAME,
+ 1,
+ DEFAULT_KERNEL_CHANNEL_OUTPUT,
+ CONSUMER_CHANNEL_TYPE_METADATA,
+ 0, 0,
+ monitor, 0, 0);
+
+ health_code_update();
+
+ ret = consumer_send_channel(sock, &lkm);
+ if (ret < 0) {
+ goto error;
+ }
+
+ health_code_update();
+
+ /* Prep stream message structure */
+ consumer_init_add_stream_comm_msg(&lkm,
+ ksession->metadata->key,
+ ksession->metadata_stream_fd,
+ 0 /* CPU: 0 for metadata. */,
+ session->current_archive_id);
+
+ health_code_update();
+
+ /* Send stream and file descriptor */
+ ret = consumer_send_stream(sock, consumer, &lkm,
+ &ksession->metadata_stream_fd, 1);
+ if (ret < 0) {
+ goto error;
+ }
+
+ health_code_update();
error:
+ rcu_read_unlock();
+ free(pathname);
+ if (session) {
+ session_put(session);
+ }
return ret;
}
/*
- * Send all stream fds of the kernel session to the consumer.
+ * Sending a single stream to the consumer with command ADD_STREAM.
*/
-int kernel_consumer_send_session(struct consumer_data *consumer_data,
- struct ltt_kernel_session *session)
+static
+int kernel_consumer_add_stream(struct consumer_socket *sock,
+ struct ltt_kernel_channel *channel,
+ struct ltt_kernel_stream *stream,
+ struct ltt_kernel_session *session, unsigned int monitor,
+ uint64_t trace_archive_id)
{
int ret;
- struct ltt_kernel_channel *chan;
struct lttcomm_consumer_msg lkm;
- int sock = session->consumer_fd;
+ struct consumer_output *consumer;
+
+ assert(channel);
+ assert(stream);
+ assert(session);
+ assert(session->consumer);
+ assert(sock);
+
+ DBG("Sending stream %d of channel %s to kernel consumer",
+ stream->fd, channel->channel->name);
- DBG("Sending metadata stream fd");
+ /* Get consumer output pointer */
+ consumer = session->consumer;
- /* Extra protection. It's NOT supposed to be set to -1 at this point */
- if (session->consumer_fd < 0) {
- session->consumer_fd = consumer_data->cmd_sock;
+ /* Prep stream consumer message */
+ consumer_init_add_stream_comm_msg(&lkm,
+ channel->key,
+ stream->fd,
+ stream->cpu,
+ trace_archive_id);
+
+ health_code_update();
+
+ /* Send stream and file descriptor */
+ ret = consumer_send_stream(sock, consumer, &lkm, &stream->fd, 1);
+ if (ret < 0) {
+ goto error;
}
- if (session->metadata_stream_fd >= 0) {
- /* Send metadata channel fd */
- lkm.cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
- lkm.u.channel.channel_key = session->metadata->fd;
- lkm.u.channel.max_sb_size = session->metadata->conf->attr.subbuf_size;
- lkm.u.channel.mmap_len = 0; /* for kernel */
- DBG("Sending metadata channel %d to consumer", lkm.u.channel.channel_key);
- ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
+ health_code_update();
+
+error:
+ return ret;
+}
+
+/*
+ * Sending the notification that all streams were sent with STREAMS_SENT.
+ */
+int kernel_consumer_streams_sent(struct consumer_socket *sock,
+ struct ltt_kernel_session *session, uint64_t channel_key)
+{
+ int ret;
+ struct lttcomm_consumer_msg lkm;
+ struct consumer_output *consumer;
+
+ assert(sock);
+ assert(session);
+
+ DBG("Sending streams_sent");
+ /* Get consumer output pointer */
+ consumer = session->consumer;
+
+ /* Prep stream consumer message */
+ consumer_init_streams_sent_comm_msg(&lkm,
+ LTTNG_CONSUMER_STREAMS_SENT,
+ channel_key, consumer->net_seq_index);
+
+ health_code_update();
+
+ /* Send stream and file descriptor */
+ ret = consumer_send_msg(sock, &lkm);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ return ret;
+}
+
+/*
+ * Send all stream fds of kernel channel to the consumer.
+ *
+ * The consumer socket lock must be held by the caller.
+ */
+int kernel_consumer_send_channel_streams(struct consumer_socket *sock,
+ struct ltt_kernel_channel *channel, struct ltt_kernel_session *ksession,
+ unsigned int monitor)
+{
+ int ret = LTTNG_OK;
+ struct ltt_kernel_stream *stream;
+ struct ltt_session *session = NULL;
+
+ /* Safety net */
+ assert(channel);
+ assert(ksession);
+ assert(ksession->consumer);
+ assert(sock);
+
+ rcu_read_lock();
+
+ session = session_find_by_id(ksession->id);
+ assert(session);
+ assert(pthread_mutex_trylock(&session->lock));
+ assert(session_trylock_list());
+
+ /* Bail out if consumer is disabled */
+ if (!ksession->consumer->enabled) {
+ ret = LTTNG_OK;
+ goto error;
+ }
+
+ DBG("Sending streams of channel %s to kernel consumer",
+ channel->channel->name);
+
+ if (!channel->sent_to_consumer) {
+ ret = kernel_consumer_add_channel(sock, channel, ksession, monitor);
if (ret < 0) {
- PERROR("send consumer channel");
goto error;
}
+ channel->sent_to_consumer = true;
+ }
+
+ /* Send streams */
+ cds_list_for_each_entry(stream, &channel->stream_list.head, list) {
+ if (!stream->fd || stream->sent_to_consumer) {
+ continue;
+ }
- /* Send metadata stream fd */
- lkm.cmd_type = LTTNG_CONSUMER_ADD_STREAM;
- lkm.u.stream.channel_key = session->metadata->fd;
- lkm.u.stream.stream_key = session->metadata_stream_fd;
- lkm.u.stream.state = LTTNG_CONSUMER_ACTIVE_STREAM;
- lkm.u.stream.output = DEFAULT_KERNEL_CHANNEL_OUTPUT;
- lkm.u.stream.mmap_len = 0; /* for kernel */
- lkm.u.stream.uid = session->uid;
- lkm.u.stream.gid = session->gid;
- strncpy(lkm.u.stream.path_name, session->metadata->pathname,
- PATH_MAX - 1);
- lkm.u.stream.path_name[PATH_MAX - 1] = '\0';
-
- DBG("Sending metadata stream %d to consumer", lkm.u.stream.stream_key);
- ret = lttcomm_send_unix_sock(sock, &lkm, sizeof(lkm));
+ /* Add stream on the kernel consumer side. */
+ ret = kernel_consumer_add_stream(sock, channel, stream,
+ ksession, monitor, session->current_archive_id);
if (ret < 0) {
- PERROR("send consumer stream");
goto error;
}
- ret = lttcomm_send_fds_unix_sock(sock, &session->metadata_stream_fd, 1);
+ stream->sent_to_consumer = true;
+ }
+
+error:
+ rcu_read_unlock();
+ if (session) {
+ session_put(session);
+ }
+ return ret;
+}
+
+/*
+ * Send all stream fds of the kernel session to the consumer.
+ *
+ * The consumer socket lock must be held by the caller.
+ */
+int kernel_consumer_send_session(struct consumer_socket *sock,
+ struct ltt_kernel_session *session)
+{
+ int ret, monitor = 0;
+ struct ltt_kernel_channel *chan;
+
+ /* Safety net */
+ assert(session);
+ assert(session->consumer);
+ assert(sock);
+
+ /* Bail out if consumer is disabled */
+ if (!session->consumer->enabled) {
+ ret = LTTNG_OK;
+ goto error;
+ }
+
+ /* Don't monitor the streams on the consumer if in flight recorder. */
+ if (session->output_traces) {
+ monitor = 1;
+ }
+
+ DBG("Sending session stream to kernel consumer");
+
+ if (session->metadata_stream_fd >= 0 && session->metadata) {
+ ret = kernel_consumer_add_metadata(sock, session, monitor);
if (ret < 0) {
- PERROR("send consumer stream");
goto error;
}
}
+ /* Send channel and streams of it */
cds_list_for_each_entry(chan, &session->channel_list.head, list) {
- ret = kernel_consumer_send_channel_stream(consumer_data, sock, chan,
- session->uid, session->gid);
+ ret = kernel_consumer_send_channel_streams(sock, chan, session,
+ monitor);
if (ret < 0) {
goto error;
}
+ if (monitor) {
+ /*
+ * Inform the relay that all the streams for the
+ * channel were sent.
+ */
+ ret = kernel_consumer_streams_sent(sock, session, chan->key);
+ if (ret < 0) {
+ goto error;
+ }
+ }
}
- DBG("consumer fds (metadata and channel streams) sent");
+ DBG("Kernel consumer FDs of metadata and channel streams sent");
+ session->consumer_fds_sent = 1;
return 0;
error:
return ret;
}
+int kernel_consumer_destroy_channel(struct consumer_socket *socket,
+ struct ltt_kernel_channel *channel)
+{
+ int ret;
+ struct lttcomm_consumer_msg msg;
+
+ assert(channel);
+ assert(socket);
+
+ DBG("Sending kernel consumer destroy channel key %" PRIu64, channel->key);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
+ msg.u.destroy_channel.key = channel->key;
+
+ pthread_mutex_lock(socket->lock);
+ health_code_update();
+
+ ret = consumer_send_msg(socket, &msg);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ health_code_update();
+ pthread_mutex_unlock(socket->lock);
+ return ret;
+}
+
+int kernel_consumer_destroy_metadata(struct consumer_socket *socket,
+ struct ltt_kernel_metadata *metadata)
+{
+ int ret;
+ struct lttcomm_consumer_msg msg;
+
+ assert(metadata);
+ assert(socket);
+
+ DBG("Sending kernel consumer destroy channel key %" PRIu64, metadata->key);
+
+ memset(&msg, 0, sizeof(msg));
+ msg.cmd_type = LTTNG_CONSUMER_DESTROY_CHANNEL;
+ msg.u.destroy_channel.key = metadata->key;
+
+ pthread_mutex_lock(socket->lock);
+ health_code_update();
+
+ ret = consumer_send_msg(socket, &msg);
+ if (ret < 0) {
+ goto error;
+ }
+
+error:
+ health_code_update();
+ pthread_mutex_unlock(socket->lock);
+ return ret;
+}
projects / lttng-tools.git / blobdiff