+++ /dev/null
-/*
- * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
- * Copyright (C) 2018 Jérémie Galarneau <jeremie.galarneau@efficios.com>
- *
- * SPDX-License-Identifier: GPL-2.0-only
- *
- */
-
-#define _LGPL_SOURCE
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <inttypes.h>
-
-#include <common/common.h>
-#include <common/defaults.h>
-#include <common/uri.h>
-#include <common/relayd/relayd.h>
-#include <common/string-utils/format.h>
-
-#include "consumer.h"
-#include "health-sessiond.h"
-#include "ust-app.h"
-#include "utils.h"
-#include "lttng-sessiond.h"
-
-/*
- * Return allocated full pathname of the session using the consumer trace path
- * and subdir if available.
- *
- * The caller can safely free(3) the returned value. On error, NULL is
- * returned.
- */
-char *setup_channel_trace_path(struct consumer_output *consumer,
- const char *session_path, size_t *consumer_path_offset)
-{
- int ret;
- char *pathname;
-
- LTTNG_ASSERT(consumer);
- LTTNG_ASSERT(session_path);
-
- health_code_update();
-
- /*
- * Allocate the string ourself to make sure we never exceed
- * LTTNG_PATH_MAX.
- */
- pathname = zmalloc(LTTNG_PATH_MAX);
- if (!pathname) {
- goto error;
- }
-
- /* Get correct path name destination */
- if (consumer->type == CONSUMER_DST_NET &&
- consumer->relay_major_version == 2 &&
- consumer->relay_minor_version < 11) {
- ret = snprintf(pathname, LTTNG_PATH_MAX, "%s%s/%s/%s",
- consumer->dst.net.base_dir,
- consumer->chunk_path, consumer->domain_subdir,
- session_path);
- *consumer_path_offset = 0;
- } else {
- ret = snprintf(pathname, LTTNG_PATH_MAX, "%s/%s",
- consumer->domain_subdir, session_path);
- *consumer_path_offset = strlen(consumer->domain_subdir) + 1;
- }
- DBG3("Consumer trace path relative to current trace chunk: \"%s\"",
- pathname);
- if (ret < 0) {
- PERROR("Failed to format channel path");
- goto error;
- } else if (ret >= LTTNG_PATH_MAX) {
- ERR("Truncation occurred while formatting channel path");
- goto error;
- }
-
- return pathname;
-error:
- free(pathname);
- return NULL;
-}
-
-/*
- * Send a data payload using a given consumer socket of size len.
- *
- * The consumer socket lock MUST be acquired before calling this since this
- * function can change the fd value.
- *
- * Return 0 on success else a negative value on error.
- */
-int consumer_socket_send(
- struct consumer_socket *socket, const void *msg, size_t len)
-{
- int fd;
- ssize_t size;
-
- LTTNG_ASSERT(socket);
- LTTNG_ASSERT(socket->fd_ptr);
- LTTNG_ASSERT(msg);
-
- /* Consumer socket is invalid. Stopping. */
- fd = *socket->fd_ptr;
- if (fd < 0) {
- goto error;
- }
-
- size = lttcomm_send_unix_sock(fd, msg, len);
- if (size < 0) {
- /* The above call will print a PERROR on error. */
- DBG("Error when sending data to consumer on sock %d", fd);
- /*
- * At this point, the socket is not usable anymore thus closing it and
- * setting the file descriptor to -1 so it is not reused.
- */
-
- /* This call will PERROR on error. */
- (void) lttcomm_close_unix_sock(fd);
- *socket->fd_ptr = -1;
- goto error;
- }
-
- return 0;
-
-error:
- return -1;
-}
-
-/*
- * Receive a data payload using a given consumer socket of size len.
- *
- * The consumer socket lock MUST be acquired before calling this since this
- * function can change the fd value.
- *
- * Return 0 on success else a negative value on error.
- */
-int consumer_socket_recv(struct consumer_socket *socket, void *msg, size_t len)
-{
- int fd;
- ssize_t size;
-
- LTTNG_ASSERT(socket);
- LTTNG_ASSERT(socket->fd_ptr);
- LTTNG_ASSERT(msg);
-
- /* Consumer socket is invalid. Stopping. */
- fd = *socket->fd_ptr;
- if (fd < 0) {
- goto error;
- }
-
- size = lttcomm_recv_unix_sock(fd, msg, len);
- if (size <= 0) {
- /* The above call will print a PERROR on error. */
- DBG("Error when receiving data from the consumer socket %d", fd);
- /*
- * At this point, the socket is not usable anymore thus closing it and
- * setting the file descriptor to -1 so it is not reused.
- */
-
- /* This call will PERROR on error. */
- (void) lttcomm_close_unix_sock(fd);
- *socket->fd_ptr = -1;
- goto error;
- }
-
- return 0;
-
-error:
- return -1;
-}
-
-/*
- * Receive a reply command status message from the consumer. Consumer socket
- * lock MUST be acquired before calling this function.
- *
- * Return 0 on success, -1 on recv error or a negative lttng error code which
- * was possibly returned by the consumer.
- */
-int consumer_recv_status_reply(struct consumer_socket *sock)
-{
- int ret;
- struct lttcomm_consumer_status_msg reply;
-
- LTTNG_ASSERT(sock);
-
- ret = consumer_socket_recv(sock, &reply, sizeof(reply));
- if (ret < 0) {
- goto end;
- }
-
- if (reply.ret_code == LTTCOMM_CONSUMERD_SUCCESS) {
- /* All good. */
- ret = 0;
- } else {
- ret = -reply.ret_code;
- DBG("Consumer ret code %d", ret);
- }
-
-end:
- return ret;
-}
-
-/*
- * Once the ASK_CHANNEL command is sent to the consumer, the channel
- * information are sent back. This call receives that data and populates key
- * and stream_count.
- *
- * On success return 0 and both key and stream_count are set. On error, a
- * negative value is sent back and both parameters are untouched.
- */
-int consumer_recv_status_channel(struct consumer_socket *sock,
- uint64_t *key, unsigned int *stream_count)
-{
- int ret;
- struct lttcomm_consumer_status_channel reply;
-
- LTTNG_ASSERT(sock);
- LTTNG_ASSERT(stream_count);
- LTTNG_ASSERT(key);
-
- ret = consumer_socket_recv(sock, &reply, sizeof(reply));
- if (ret < 0) {
- goto end;
- }
-
- /* An error is possible so don't touch the key and stream_count. */
- if (reply.ret_code != LTTCOMM_CONSUMERD_SUCCESS) {
- ret = -1;
- goto end;
- }
-
- *key = reply.key;
- *stream_count = reply.stream_count;
- ret = 0;
-
-end:
- return ret;
-}
-
-/*
- * Send destroy relayd command to consumer.
- *
- * On success return positive value. On error, negative value.
- */
-int consumer_send_destroy_relayd(struct consumer_socket *sock,
- struct consumer_output *consumer)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(consumer);
- LTTNG_ASSERT(sock);
-
- DBG2("Sending destroy relayd command to consumer sock %d", *sock->fd_ptr);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_DESTROY_RELAYD;
- msg.u.destroy_relayd.net_seq_idx = consumer->net_seq_index;
-
- pthread_mutex_lock(sock->lock);
- ret = consumer_socket_send(sock, &msg, sizeof(msg));
- if (ret < 0) {
- goto error;
- }
-
- /* Don't check the return value. The caller will do it. */
- ret = consumer_recv_status_reply(sock);
-
- DBG2("Consumer send destroy relayd command done");
-
-error:
- pthread_mutex_unlock(sock->lock);
- return ret;
-}
-
-/*
- * For each consumer socket in the consumer output object, send a destroy
- * relayd command.
- */
-void consumer_output_send_destroy_relayd(struct consumer_output *consumer)
-{
- struct lttng_ht_iter iter;
- struct consumer_socket *socket;
-
- LTTNG_ASSERT(consumer);
-
- /* Destroy any relayd connection */
- if (consumer->type == CONSUMER_DST_NET) {
- rcu_read_lock();
- cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
- node.node) {
- int ret;
-
- /* Send destroy relayd command */
- ret = consumer_send_destroy_relayd(socket, consumer);
- if (ret < 0) {
- DBG("Unable to send destroy relayd command to consumer");
- /* Continue since we MUST delete everything at this point. */
- }
- }
- rcu_read_unlock();
- }
-}
-
-/*
- * From a consumer_data structure, allocate and add a consumer socket to the
- * consumer output.
- *
- * Return 0 on success, else negative value on error
- */
-int consumer_create_socket(struct consumer_data *data,
- struct consumer_output *output)
-{
- int ret = 0;
- struct consumer_socket *socket;
-
- LTTNG_ASSERT(data);
-
- if (output == NULL || data->cmd_sock < 0) {
- /*
- * Not an error. Possible there is simply not spawned consumer or it's
- * disabled for the tracing session asking the socket.
- */
- goto error;
- }
-
- rcu_read_lock();
- socket = consumer_find_socket(data->cmd_sock, output);
- rcu_read_unlock();
- if (socket == NULL) {
- socket = consumer_allocate_socket(&data->cmd_sock);
- if (socket == NULL) {
- ret = -1;
- goto error;
- }
-
- socket->registered = 0;
- socket->lock = &data->lock;
- rcu_read_lock();
- consumer_add_socket(socket, output);
- rcu_read_unlock();
- }
-
- socket->type = data->type;
-
- DBG3("Consumer socket created (fd: %d) and added to output",
- data->cmd_sock);
-
-error:
- return ret;
-}
-
-/*
- * Return the consumer socket from the given consumer output with the right
- * bitness. On error, returns NULL.
- *
- * The caller MUST acquire a rcu read side lock and keep it until the socket
- * object reference is not needed anymore.
- */
-struct consumer_socket *consumer_find_socket_by_bitness(int bits,
- const struct consumer_output *consumer)
-{
- int consumer_fd;
- struct consumer_socket *socket = NULL;
-
- switch (bits) {
- case 64:
- consumer_fd = uatomic_read(&the_ust_consumerd64_fd);
- break;
- case 32:
- consumer_fd = uatomic_read(&the_ust_consumerd32_fd);
- break;
- default:
- abort();
- goto end;
- }
-
- socket = consumer_find_socket(consumer_fd, consumer);
- if (!socket) {
- ERR("Consumer socket fd %d not found in consumer obj %p",
- consumer_fd, consumer);
- }
-
-end:
- return socket;
-}
-
-/*
- * Find a consumer_socket in a consumer_output hashtable. Read side lock must
- * be acquired before calling this function and across use of the
- * returned consumer_socket.
- */
-struct consumer_socket *consumer_find_socket(int key,
- const struct consumer_output *consumer)
-{
- struct lttng_ht_iter iter;
- struct lttng_ht_node_ulong *node;
- struct consumer_socket *socket = NULL;
-
- /* Negative keys are lookup failures */
- if (key < 0 || consumer == NULL) {
- return NULL;
- }
-
- lttng_ht_lookup(consumer->socks, (void *)((unsigned long) key),
- &iter);
- node = lttng_ht_iter_get_node_ulong(&iter);
- if (node != NULL) {
- socket = caa_container_of(node, struct consumer_socket, node);
- }
-
- return socket;
-}
-
-/*
- * Allocate a new consumer_socket and return the pointer.
- */
-struct consumer_socket *consumer_allocate_socket(int *fd)
-{
- struct consumer_socket *socket = NULL;
-
- LTTNG_ASSERT(fd);
-
- socket = zmalloc(sizeof(struct consumer_socket));
- if (socket == NULL) {
- PERROR("zmalloc consumer socket");
- goto error;
- }
-
- socket->fd_ptr = fd;
- lttng_ht_node_init_ulong(&socket->node, *fd);
-
-error:
- return socket;
-}
-
-/*
- * Add consumer socket to consumer output object. Read side lock must be
- * acquired before calling this function.
- */
-void consumer_add_socket(struct consumer_socket *sock,
- struct consumer_output *consumer)
-{
- LTTNG_ASSERT(sock);
- LTTNG_ASSERT(consumer);
-
- lttng_ht_add_unique_ulong(consumer->socks, &sock->node);
-}
-
-/*
- * Delete consumer socket to consumer output object. Read side lock must be
- * acquired before calling this function.
- */
-void consumer_del_socket(struct consumer_socket *sock,
- struct consumer_output *consumer)
-{
- int ret;
- struct lttng_ht_iter iter;
-
- LTTNG_ASSERT(sock);
- LTTNG_ASSERT(consumer);
-
- iter.iter.node = &sock->node.node;
- ret = lttng_ht_del(consumer->socks, &iter);
- LTTNG_ASSERT(!ret);
-}
-
-/*
- * RCU destroy call function.
- */
-static void destroy_socket_rcu(struct rcu_head *head)
-{
- struct lttng_ht_node_ulong *node =
- caa_container_of(head, struct lttng_ht_node_ulong, head);
- struct consumer_socket *socket =
- caa_container_of(node, struct consumer_socket, node);
-
- free(socket);
-}
-
-/*
- * Destroy and free socket pointer in a call RCU. Read side lock must be
- * acquired before calling this function.
- */
-void consumer_destroy_socket(struct consumer_socket *sock)
-{
- LTTNG_ASSERT(sock);
-
- /*
- * We DO NOT close the file descriptor here since it is global to the
- * session daemon and is closed only if the consumer dies or a custom
- * consumer was registered,
- */
- if (sock->registered) {
- DBG3("Consumer socket was registered. Closing fd %d", *sock->fd_ptr);
- lttcomm_close_unix_sock(*sock->fd_ptr);
- }
-
- call_rcu(&sock->node.head, destroy_socket_rcu);
-}
-
-/*
- * Allocate and assign data to a consumer_output object.
- *
- * Return pointer to structure.
- */
-struct consumer_output *consumer_create_output(enum consumer_dst_type type)
-{
- struct consumer_output *output = NULL;
-
- output = zmalloc(sizeof(struct consumer_output));
- if (output == NULL) {
- PERROR("zmalloc consumer_output");
- goto error;
- }
-
- /* By default, consumer output is enabled */
- output->enabled = 1;
- output->type = type;
- output->net_seq_index = (uint64_t) -1ULL;
- urcu_ref_init(&output->ref);
-
- output->socks = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
-
-error:
- return output;
-}
-
-/*
- * Iterate over the consumer output socket hash table and destroy them. The
- * socket file descriptor are only closed if the consumer output was
- * registered meaning it's an external consumer.
- */
-void consumer_destroy_output_sockets(struct consumer_output *obj)
-{
- struct lttng_ht_iter iter;
- struct consumer_socket *socket;
-
- if (!obj->socks) {
- return;
- }
-
- rcu_read_lock();
- cds_lfht_for_each_entry(obj->socks->ht, &iter.iter, socket, node.node) {
- consumer_del_socket(socket, obj);
- consumer_destroy_socket(socket);
- }
- rcu_read_unlock();
-}
-
-/*
- * Delete the consumer_output object from the list and free the ptr.
- *
- * Should *NOT* be called with RCU read-side lock held.
- */
-static void consumer_release_output(struct urcu_ref *ref)
-{
- struct consumer_output *obj =
- caa_container_of(ref, struct consumer_output, ref);
-
- consumer_destroy_output_sockets(obj);
-
- if (obj->socks) {
- /* Finally destroy HT */
- ht_cleanup_push(obj->socks);
- }
-
- free(obj);
-}
-
-/*
- * Get the consumer_output object.
- */
-void consumer_output_get(struct consumer_output *obj)
-{
- urcu_ref_get(&obj->ref);
-}
-
-/*
- * Put the consumer_output object.
- *
- * Should *NOT* be called with RCU read-side lock held.
- */
-void consumer_output_put(struct consumer_output *obj)
-{
- if (!obj) {
- return;
- }
- urcu_ref_put(&obj->ref, consumer_release_output);
-}
-
-/*
- * Copy consumer output and returned the newly allocated copy.
- *
- * Should *NOT* be called with RCU read-side lock held.
- */
-struct consumer_output *consumer_copy_output(struct consumer_output *src)
-{
- int ret;
- struct consumer_output *output;
-
- LTTNG_ASSERT(src);
-
- output = consumer_create_output(src->type);
- if (output == NULL) {
- goto end;
- }
- output->enabled = src->enabled;
- output->net_seq_index = src->net_seq_index;
- memcpy(output->domain_subdir, src->domain_subdir,
- sizeof(output->domain_subdir));
- output->snapshot = src->snapshot;
- output->relay_major_version = src->relay_major_version;
- output->relay_minor_version = src->relay_minor_version;
- output->relay_allows_clear = src->relay_allows_clear;
- memcpy(&output->dst, &src->dst, sizeof(output->dst));
- ret = consumer_copy_sockets(output, src);
- if (ret < 0) {
- goto error_put;
- }
-end:
- return output;
-
-error_put:
- consumer_output_put(output);
- return NULL;
-}
-
-/*
- * Copy consumer sockets from src to dst.
- *
- * Return 0 on success or else a negative value.
- */
-int consumer_copy_sockets(struct consumer_output *dst,
- struct consumer_output *src)
-{
- int ret = 0;
- struct lttng_ht_iter iter;
- struct consumer_socket *socket, *copy_sock;
-
- LTTNG_ASSERT(dst);
- LTTNG_ASSERT(src);
-
- rcu_read_lock();
- cds_lfht_for_each_entry(src->socks->ht, &iter.iter, socket, node.node) {
- /* Ignore socket that are already there. */
- copy_sock = consumer_find_socket(*socket->fd_ptr, dst);
- if (copy_sock) {
- continue;
- }
-
- /* Create new socket object. */
- copy_sock = consumer_allocate_socket(socket->fd_ptr);
- if (copy_sock == NULL) {
- rcu_read_unlock();
- ret = -ENOMEM;
- goto error;
- }
-
- copy_sock->registered = socket->registered;
- /*
- * This is valid because this lock is shared accross all consumer
- * object being the global lock of the consumer data structure of the
- * session daemon.
- */
- copy_sock->lock = socket->lock;
- consumer_add_socket(copy_sock, dst);
- }
- rcu_read_unlock();
-
-error:
- return ret;
-}
-
-/*
- * Set network URI to the consumer output.
- *
- * Return 0 on success. Return 1 if the URI were equal. Else, negative value on
- * error.
- */
-int consumer_set_network_uri(const struct ltt_session *session,
- struct consumer_output *output,
- struct lttng_uri *uri)
-{
- int ret;
- struct lttng_uri *dst_uri = NULL;
-
- /* Code flow error safety net. */
- LTTNG_ASSERT(output);
- LTTNG_ASSERT(uri);
-
- switch (uri->stype) {
- case LTTNG_STREAM_CONTROL:
- dst_uri = &output->dst.net.control;
- output->dst.net.control_isset = 1;
- if (uri->port == 0) {
- /* Assign default port. */
- uri->port = DEFAULT_NETWORK_CONTROL_PORT;
- } else {
- if (output->dst.net.data_isset && uri->port ==
- output->dst.net.data.port) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
- }
- DBG3("Consumer control URI set with port %d", uri->port);
- break;
- case LTTNG_STREAM_DATA:
- dst_uri = &output->dst.net.data;
- output->dst.net.data_isset = 1;
- if (uri->port == 0) {
- /* Assign default port. */
- uri->port = DEFAULT_NETWORK_DATA_PORT;
- } else {
- if (output->dst.net.control_isset && uri->port ==
- output->dst.net.control.port) {
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
- }
- DBG3("Consumer data URI set with port %d", uri->port);
- break;
- default:
- ERR("Set network uri type unknown %d", uri->stype);
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- ret = uri_compare(dst_uri, uri);
- if (!ret) {
- /* Same URI, don't touch it and return success. */
- DBG3("URI network compare are the same");
- goto equal;
- }
-
- /* URIs were not equal, replacing it. */
- memcpy(dst_uri, uri, sizeof(struct lttng_uri));
- output->type = CONSUMER_DST_NET;
- if (dst_uri->stype != LTTNG_STREAM_CONTROL) {
- /* Only the control uri needs to contain the path. */
- goto end;
- }
-
- /*
- * If the user has specified a subdir as part of the control
- * URL, the session's base output directory is:
- * /RELAYD_OUTPUT_PATH/HOSTNAME/USER_SPECIFIED_DIR
- *
- * Hence, the "base_dir" from which all stream files and
- * session rotation chunks are created takes the form
- * /HOSTNAME/USER_SPECIFIED_DIR
- *
- * If the user has not specified an output directory as part of
- * the control URL, the base output directory has the form:
- * /RELAYD_OUTPUT_PATH/HOSTNAME/SESSION_NAME-CREATION_TIME
- *
- * Hence, the "base_dir" from which all stream files and
- * session rotation chunks are created takes the form
- * /HOSTNAME/SESSION_NAME-CREATION_TIME
- *
- * Note that automatically generated session names already
- * contain the session's creation time. In that case, the
- * creation time is omitted to prevent it from being duplicated
- * in the final directory hierarchy.
- */
- if (*uri->subdir) {
- if (strstr(uri->subdir, "../")) {
- ERR("Network URI subdirs are not allowed to walk up the path hierarchy");
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
- ret = snprintf(output->dst.net.base_dir,
- sizeof(output->dst.net.base_dir),
- "/%s/%s/", session->hostname, uri->subdir);
- } else {
- if (session->has_auto_generated_name) {
- ret = snprintf(output->dst.net.base_dir,
- sizeof(output->dst.net.base_dir),
- "/%s/%s/", session->hostname,
- session->name);
- } else {
- char session_creation_datetime[16];
- size_t strftime_ret;
- struct tm *timeinfo;
-
- timeinfo = localtime(&session->creation_time);
- if (!timeinfo) {
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- strftime_ret = strftime(session_creation_datetime,
- sizeof(session_creation_datetime),
- "%Y%m%d-%H%M%S", timeinfo);
- if (strftime_ret == 0) {
- ERR("Failed to format session creation timestamp while setting network URI");
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- ret = snprintf(output->dst.net.base_dir,
- sizeof(output->dst.net.base_dir),
- "/%s/%s-%s/", session->hostname,
- session->name,
- session_creation_datetime);
- }
- }
- if (ret >= sizeof(output->dst.net.base_dir)) {
- ret = -LTTNG_ERR_INVALID;
- ERR("Truncation occurred while setting network output base directory");
- goto error;
- } else if (ret == -1) {
- ret = -LTTNG_ERR_INVALID;
- PERROR("Error occurred while setting network output base directory");
- goto error;
- }
-
- DBG3("Consumer set network uri base_dir path %s",
- output->dst.net.base_dir);
-
-end:
- return 0;
-equal:
- return 1;
-error:
- return ret;
-}
-
-/*
- * Send file descriptor to consumer via sock.
- *
- * The consumer socket lock must be held by the caller.
- */
-int consumer_send_fds(struct consumer_socket *sock, const int *fds,
- size_t nb_fd)
-{
- int ret;
-
- LTTNG_ASSERT(fds);
- LTTNG_ASSERT(sock);
- LTTNG_ASSERT(nb_fd > 0);
- LTTNG_ASSERT(pthread_mutex_trylock(sock->lock) == EBUSY);
-
- ret = lttcomm_send_fds_unix_sock(*sock->fd_ptr, fds, nb_fd);
- if (ret < 0) {
- /* The above call will print a PERROR on error. */
- DBG("Error when sending consumer fds on sock %d", *sock->fd_ptr);
- goto error;
- }
-
- ret = consumer_recv_status_reply(sock);
-error:
- return ret;
-}
-
-/*
- * Consumer send communication message structure to consumer.
- *
- * The consumer socket lock must be held by the caller.
- */
-int consumer_send_msg(struct consumer_socket *sock,
- const struct lttcomm_consumer_msg *msg)
-{
- int ret;
-
- LTTNG_ASSERT(msg);
- LTTNG_ASSERT(sock);
- LTTNG_ASSERT(pthread_mutex_trylock(sock->lock) == EBUSY);
-
- ret = consumer_socket_send(sock, msg, sizeof(struct lttcomm_consumer_msg));
- if (ret < 0) {
- goto error;
- }
-
- ret = consumer_recv_status_reply(sock);
-
-error:
- return ret;
-}
-
-/*
- * Consumer send channel communication message structure to consumer.
- *
- * The consumer socket lock must be held by the caller.
- */
-int consumer_send_channel(struct consumer_socket *sock,
- struct lttcomm_consumer_msg *msg)
-{
- int ret;
-
- LTTNG_ASSERT(msg);
- LTTNG_ASSERT(sock);
-
- ret = consumer_send_msg(sock, msg);
- if (ret < 0) {
- goto error;
- }
-
-error:
- return ret;
-}
-
-/*
- * Populate the given consumer msg structure with the ask_channel command
- * information.
- */
-void consumer_init_ask_channel_comm_msg(struct lttcomm_consumer_msg *msg,
- uint64_t subbuf_size,
- uint64_t num_subbuf,
- int overwrite,
- unsigned int switch_timer_interval,
- unsigned int read_timer_interval,
- unsigned int live_timer_interval,
- bool is_in_live_session,
- unsigned int monitor_timer_interval,
- int output,
- int type,
- uint64_t session_id,
- const char *pathname,
- const char *name,
- uint64_t relayd_id,
- uint64_t key,
- unsigned char *uuid,
- uint32_t chan_id,
- uint64_t tracefile_size,
- uint64_t tracefile_count,
- uint64_t session_id_per_pid,
- unsigned int monitor,
- uint32_t ust_app_uid,
- int64_t blocking_timeout,
- const char *root_shm_path,
- const char *shm_path,
- struct lttng_trace_chunk *trace_chunk,
- const struct lttng_credentials *buffer_credentials)
-{
- LTTNG_ASSERT(msg);
-
- /* Zeroed structure */
- memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
- msg->u.ask_channel.buffer_credentials.uid = UINT32_MAX;
- msg->u.ask_channel.buffer_credentials.gid = UINT32_MAX;
-
- if (trace_chunk) {
- uint64_t chunk_id;
- enum lttng_trace_chunk_status chunk_status;
-
- chunk_status = lttng_trace_chunk_get_id(trace_chunk, &chunk_id);
- LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
- LTTNG_OPTIONAL_SET(&msg->u.ask_channel.chunk_id, chunk_id);
- }
- msg->u.ask_channel.buffer_credentials.uid =
- lttng_credentials_get_uid(buffer_credentials);
- msg->u.ask_channel.buffer_credentials.gid =
- lttng_credentials_get_gid(buffer_credentials);
-
- msg->cmd_type = LTTNG_CONSUMER_ASK_CHANNEL_CREATION;
- msg->u.ask_channel.subbuf_size = subbuf_size;
- msg->u.ask_channel.num_subbuf = num_subbuf ;
- msg->u.ask_channel.overwrite = overwrite;
- msg->u.ask_channel.switch_timer_interval = switch_timer_interval;
- msg->u.ask_channel.read_timer_interval = read_timer_interval;
- msg->u.ask_channel.live_timer_interval = live_timer_interval;
- msg->u.ask_channel.is_live = is_in_live_session;
- msg->u.ask_channel.monitor_timer_interval = monitor_timer_interval;
- msg->u.ask_channel.output = output;
- msg->u.ask_channel.type = type;
- msg->u.ask_channel.session_id = session_id;
- msg->u.ask_channel.session_id_per_pid = session_id_per_pid;
- msg->u.ask_channel.relayd_id = relayd_id;
- msg->u.ask_channel.key = key;
- msg->u.ask_channel.chan_id = chan_id;
- msg->u.ask_channel.tracefile_size = tracefile_size;
- msg->u.ask_channel.tracefile_count = tracefile_count;
- msg->u.ask_channel.monitor = monitor;
- msg->u.ask_channel.ust_app_uid = ust_app_uid;
- msg->u.ask_channel.blocking_timeout = blocking_timeout;
-
- memcpy(msg->u.ask_channel.uuid, uuid, sizeof(msg->u.ask_channel.uuid));
-
- if (pathname) {
- strncpy(msg->u.ask_channel.pathname, pathname,
- sizeof(msg->u.ask_channel.pathname));
- msg->u.ask_channel.pathname[sizeof(msg->u.ask_channel.pathname)-1] = '\0';
- }
-
- strncpy(msg->u.ask_channel.name, name, sizeof(msg->u.ask_channel.name));
- msg->u.ask_channel.name[sizeof(msg->u.ask_channel.name) - 1] = '\0';
-
- if (root_shm_path) {
- strncpy(msg->u.ask_channel.root_shm_path, root_shm_path,
- sizeof(msg->u.ask_channel.root_shm_path));
- msg->u.ask_channel.root_shm_path[sizeof(msg->u.ask_channel.root_shm_path) - 1] = '\0';
- }
- if (shm_path) {
- strncpy(msg->u.ask_channel.shm_path, shm_path,
- sizeof(msg->u.ask_channel.shm_path));
- msg->u.ask_channel.shm_path[sizeof(msg->u.ask_channel.shm_path) - 1] = '\0';
- }
-}
-
-/*
- * Init channel communication message structure.
- */
-void consumer_init_add_channel_comm_msg(struct lttcomm_consumer_msg *msg,
- uint64_t channel_key,
- uint64_t session_id,
- const char *pathname,
- uid_t uid,
- gid_t gid,
- uint64_t relayd_id,
- const char *name,
- unsigned int nb_init_streams,
- enum lttng_event_output output,
- int type,
- uint64_t tracefile_size,
- uint64_t tracefile_count,
- unsigned int monitor,
- unsigned int live_timer_interval,
- bool is_in_live_session,
- unsigned int monitor_timer_interval,
- struct lttng_trace_chunk *trace_chunk)
-{
- LTTNG_ASSERT(msg);
-
- /* Zeroed structure */
- memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
-
- if (trace_chunk) {
- uint64_t chunk_id;
- enum lttng_trace_chunk_status chunk_status;
-
- chunk_status = lttng_trace_chunk_get_id(trace_chunk, &chunk_id);
- LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
- LTTNG_OPTIONAL_SET(&msg->u.channel.chunk_id, chunk_id);
- }
-
- /* Send channel */
- msg->cmd_type = LTTNG_CONSUMER_ADD_CHANNEL;
- msg->u.channel.channel_key = channel_key;
- msg->u.channel.session_id = session_id;
- msg->u.channel.relayd_id = relayd_id;
- msg->u.channel.nb_init_streams = nb_init_streams;
- msg->u.channel.output = output;
- msg->u.channel.type = type;
- msg->u.channel.tracefile_size = tracefile_size;
- msg->u.channel.tracefile_count = tracefile_count;
- msg->u.channel.monitor = monitor;
- msg->u.channel.live_timer_interval = live_timer_interval;
- msg->u.channel.is_live = is_in_live_session;
- msg->u.channel.monitor_timer_interval = monitor_timer_interval;
-
- strncpy(msg->u.channel.pathname, pathname,
- sizeof(msg->u.channel.pathname));
- msg->u.channel.pathname[sizeof(msg->u.channel.pathname) - 1] = '\0';
-
- strncpy(msg->u.channel.name, name, sizeof(msg->u.channel.name));
- msg->u.channel.name[sizeof(msg->u.channel.name) - 1] = '\0';
-}
-
-/*
- * Init stream communication message structure.
- */
-void consumer_init_add_stream_comm_msg(struct lttcomm_consumer_msg *msg,
- uint64_t channel_key,
- uint64_t stream_key,
- int32_t cpu)
-{
- LTTNG_ASSERT(msg);
-
- memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
-
- msg->cmd_type = LTTNG_CONSUMER_ADD_STREAM;
- msg->u.stream.channel_key = channel_key;
- msg->u.stream.stream_key = stream_key;
- msg->u.stream.cpu = cpu;
-}
-
-void consumer_init_streams_sent_comm_msg(struct lttcomm_consumer_msg *msg,
- enum lttng_consumer_command cmd,
- uint64_t channel_key, uint64_t net_seq_idx)
-{
- LTTNG_ASSERT(msg);
-
- memset(msg, 0, sizeof(struct lttcomm_consumer_msg));
-
- msg->cmd_type = cmd;
- msg->u.sent_streams.channel_key = channel_key;
- msg->u.sent_streams.net_seq_idx = net_seq_idx;
-}
-
-/*
- * Send stream communication structure to the consumer.
- */
-int consumer_send_stream(struct consumer_socket *sock,
- struct consumer_output *dst, struct lttcomm_consumer_msg *msg,
- const int *fds, size_t nb_fd)
-{
- int ret;
-
- LTTNG_ASSERT(msg);
- LTTNG_ASSERT(dst);
- LTTNG_ASSERT(sock);
- LTTNG_ASSERT(fds);
-
- ret = consumer_send_msg(sock, msg);
- if (ret < 0) {
- goto error;
- }
-
- ret = consumer_send_fds(sock, fds, nb_fd);
- if (ret < 0) {
- goto error;
- }
-
-error:
- return ret;
-}
-
-/*
- * Send relayd socket to consumer associated with a session name.
- *
- * The consumer socket lock must be held by the caller.
- *
- * On success return positive value. On error, negative value.
- */
-int consumer_send_relayd_socket(struct consumer_socket *consumer_sock,
- struct lttcomm_relayd_sock *rsock, struct consumer_output *consumer,
- enum lttng_stream_type type, uint64_t session_id,
- const char *session_name, const char *hostname,
- const char *base_path, int session_live_timer,
- const uint64_t *current_chunk_id, time_t session_creation_time,
- bool session_name_contains_creation_time)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- /* Code flow error. Safety net. */
- LTTNG_ASSERT(rsock);
- LTTNG_ASSERT(consumer);
- LTTNG_ASSERT(consumer_sock);
-
- memset(&msg, 0, sizeof(msg));
- /* Bail out if consumer is disabled */
- if (!consumer->enabled) {
- ret = LTTNG_OK;
- goto error;
- }
-
- if (type == LTTNG_STREAM_CONTROL) {
- char output_path[LTTNG_PATH_MAX] = {};
- uint64_t relayd_session_id;
-
- ret = relayd_create_session(rsock, &relayd_session_id,
- session_name, hostname, base_path,
- session_live_timer, consumer->snapshot,
- session_id, the_sessiond_uuid, current_chunk_id,
- session_creation_time,
- session_name_contains_creation_time,
- output_path);
- if (ret < 0) {
- /* Close the control socket. */
- (void) relayd_close(rsock);
- goto error;
- }
- msg.u.relayd_sock.relayd_session_id = relayd_session_id;
- DBG("Created session on relay, output path reply: %s",
- output_path);
- }
-
- msg.cmd_type = LTTNG_CONSUMER_ADD_RELAYD_SOCKET;
- /*
- * Assign network consumer output index using the temporary consumer since
- * this call should only be made from within a set_consumer_uri() function
- * call in the session daemon.
- */
- msg.u.relayd_sock.net_index = consumer->net_seq_index;
- msg.u.relayd_sock.type = type;
- msg.u.relayd_sock.session_id = session_id;
- memcpy(&msg.u.relayd_sock.sock, rsock, sizeof(msg.u.relayd_sock.sock));
-
- DBG3("Sending relayd sock info to consumer on %d", *consumer_sock->fd_ptr);
- ret = consumer_send_msg(consumer_sock, &msg);
- if (ret < 0) {
- goto error;
- }
-
- DBG3("Sending relayd socket file descriptor to consumer");
- ret = consumer_send_fds(consumer_sock, ALIGNED_CONST_PTR(rsock->sock.fd), 1);
- if (ret < 0) {
- goto error;
- }
-
- DBG2("Consumer relayd socket sent");
-
-error:
- return ret;
-}
-
-static
-int consumer_send_pipe(struct consumer_socket *consumer_sock,
- enum lttng_consumer_command cmd, int pipe)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
- const char *pipe_name;
- const char *command_name;
-
- switch (cmd) {
- case LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE:
- pipe_name = "channel monitor";
- command_name = "SET_CHANNEL_MONITOR_PIPE";
- break;
- default:
- ERR("Unexpected command received in %s (cmd = %d)", __func__,
- (int) cmd);
- abort();
- }
-
- /* Code flow error. Safety net. */
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = cmd;
-
- pthread_mutex_lock(consumer_sock->lock);
- DBG3("Sending %s command to consumer", command_name);
- ret = consumer_send_msg(consumer_sock, &msg);
- if (ret < 0) {
- goto error;
- }
-
- DBG3("Sending %s pipe %d to consumer on socket %d",
- pipe_name,
- pipe, *consumer_sock->fd_ptr);
- ret = consumer_send_fds(consumer_sock, &pipe, 1);
- if (ret < 0) {
- goto error;
- }
-
- DBG2("%s pipe successfully sent", pipe_name);
-error:
- pthread_mutex_unlock(consumer_sock->lock);
- return ret;
-}
-
-int consumer_send_channel_monitor_pipe(struct consumer_socket *consumer_sock,
- int pipe)
-{
- return consumer_send_pipe(consumer_sock,
- LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE, pipe);
-}
-
-/*
- * Ask the consumer if the data is pending for the specific session id.
- * Returns 1 if data is pending, 0 otherwise, or < 0 on error.
- */
-int consumer_is_data_pending(uint64_t session_id,
- struct consumer_output *consumer)
-{
- int ret;
- int32_t ret_code = 0; /* Default is that the data is NOT pending */
- struct consumer_socket *socket;
- struct lttng_ht_iter iter;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(consumer);
-
- DBG3("Consumer data pending for id %" PRIu64, session_id);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_DATA_PENDING;
- msg.u.data_pending.session_id = session_id;
-
- /* Send command for each consumer */
- rcu_read_lock();
- cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
- node.node) {
- pthread_mutex_lock(socket->lock);
- ret = consumer_socket_send(socket, &msg, sizeof(msg));
- if (ret < 0) {
- pthread_mutex_unlock(socket->lock);
- goto error_unlock;
- }
-
- /*
- * No need for a recv reply status because the answer to the command is
- * the reply status message.
- */
-
- ret = consumer_socket_recv(socket, &ret_code, sizeof(ret_code));
- if (ret < 0) {
- pthread_mutex_unlock(socket->lock);
- goto error_unlock;
- }
- pthread_mutex_unlock(socket->lock);
-
- if (ret_code == 1) {
- break;
- }
- }
- rcu_read_unlock();
-
- DBG("Consumer data is %s pending for session id %" PRIu64,
- ret_code == 1 ? "" : "NOT", session_id);
- return ret_code;
-
-error_unlock:
- rcu_read_unlock();
- return -1;
-}
-
-/*
- * Send a flush command to consumer using the given channel key.
- *
- * Return 0 on success else a negative value.
- */
-int consumer_flush_channel(struct consumer_socket *socket, uint64_t key)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
-
- DBG2("Consumer flush channel key %" PRIu64, key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_FLUSH_CHANNEL;
- msg.u.flush_channel.key = key;
-
- pthread_mutex_lock(socket->lock);
- health_code_update();
-
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0) {
- goto end;
- }
-
-end:
- health_code_update();
- pthread_mutex_unlock(socket->lock);
- return ret;
-}
-
-/*
- * Send a clear quiescent command to consumer using the given channel key.
- *
- * Return 0 on success else a negative value.
- */
-int consumer_clear_quiescent_channel(struct consumer_socket *socket, uint64_t key)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
-
- DBG2("Consumer clear quiescent channel key %" PRIu64, key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL;
- msg.u.clear_quiescent_channel.key = key;
-
- pthread_mutex_lock(socket->lock);
- health_code_update();
-
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0) {
- goto end;
- }
-
-end:
- health_code_update();
- pthread_mutex_unlock(socket->lock);
- return ret;
-}
-
-/*
- * Send a close metadata command to consumer using the given channel key.
- * Called with registry lock held.
- *
- * Return 0 on success else a negative value.
- */
-int consumer_close_metadata(struct consumer_socket *socket,
- uint64_t metadata_key)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
-
- DBG2("Consumer close metadata channel key %" PRIu64, metadata_key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_CLOSE_METADATA;
- msg.u.close_metadata.key = metadata_key;
-
- pthread_mutex_lock(socket->lock);
- health_code_update();
-
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0) {
- goto end;
- }
-
-end:
- health_code_update();
- pthread_mutex_unlock(socket->lock);
- return ret;
-}
-
-/*
- * Send a setup metdata command to consumer using the given channel key.
- *
- * Return 0 on success else a negative value.
- */
-int consumer_setup_metadata(struct consumer_socket *socket,
- uint64_t metadata_key)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
-
- DBG2("Consumer setup metadata channel key %" PRIu64, metadata_key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_SETUP_METADATA;
- msg.u.setup_metadata.key = metadata_key;
-
- pthread_mutex_lock(socket->lock);
- health_code_update();
-
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0) {
- goto end;
- }
-
-end:
- health_code_update();
- pthread_mutex_unlock(socket->lock);
- return ret;
-}
-
-/*
- * Send metadata string to consumer.
- * RCU read-side lock must be held to guarantee existence of socket.
- *
- * Return 0 on success else a negative value.
- */
-int consumer_push_metadata(struct consumer_socket *socket,
- uint64_t metadata_key, char *metadata_str, size_t len,
- size_t target_offset, uint64_t version)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
-
- DBG2("Consumer push metadata to consumer socket %d", *socket->fd_ptr);
-
- pthread_mutex_lock(socket->lock);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_PUSH_METADATA;
- msg.u.push_metadata.key = metadata_key;
- msg.u.push_metadata.target_offset = target_offset;
- msg.u.push_metadata.len = len;
- msg.u.push_metadata.version = version;
-
- health_code_update();
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0 || len == 0) {
- goto end;
- }
-
- DBG3("Consumer pushing metadata on sock %d of len %zu", *socket->fd_ptr,
- len);
-
- ret = consumer_socket_send(socket, metadata_str, len);
- if (ret < 0) {
- goto end;
- }
-
- health_code_update();
- ret = consumer_recv_status_reply(socket);
- if (ret < 0) {
- goto end;
- }
-
-end:
- pthread_mutex_unlock(socket->lock);
- health_code_update();
- return ret;
-}
-
-/*
- * Ask the consumer to snapshot a specific channel using the key.
- *
- * Returns LTTNG_OK on success or else an LTTng error code.
- */
-enum lttng_error_code consumer_snapshot_channel(struct consumer_socket *socket,
- uint64_t key, const struct consumer_output *output, int metadata,
- uid_t uid, gid_t gid, const char *channel_path, int wait,
- uint64_t nb_packets_per_stream)
-{
- int ret;
- enum lttng_error_code status = LTTNG_OK;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
- LTTNG_ASSERT(output);
-
- DBG("Consumer snapshot channel key %" PRIu64, key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_SNAPSHOT_CHANNEL;
- msg.u.snapshot_channel.key = key;
- msg.u.snapshot_channel.nb_packets_per_stream = nb_packets_per_stream;
- msg.u.snapshot_channel.metadata = metadata;
-
- if (output->type == CONSUMER_DST_NET) {
- msg.u.snapshot_channel.relayd_id =
- output->net_seq_index;
- msg.u.snapshot_channel.use_relayd = 1;
- } else {
- msg.u.snapshot_channel.relayd_id = (uint64_t) -1ULL;
- }
- ret = lttng_strncpy(msg.u.snapshot_channel.pathname,
- channel_path,
- sizeof(msg.u.snapshot_channel.pathname));
- if (ret < 0) {
- ERR("Snapshot path exceeds the maximal allowed length of %zu bytes (%zu bytes required) with path \"%s\"",
- sizeof(msg.u.snapshot_channel.pathname),
- strlen(channel_path),
- channel_path);
- status = LTTNG_ERR_SNAPSHOT_FAIL;
- goto error;
- }
-
- health_code_update();
- pthread_mutex_lock(socket->lock);
- ret = consumer_send_msg(socket, &msg);
- pthread_mutex_unlock(socket->lock);
- if (ret < 0) {
- switch (-ret) {
- case LTTCOMM_CONSUMERD_CHAN_NOT_FOUND:
- status = LTTNG_ERR_CHAN_NOT_FOUND;
- break;
- default:
- status = LTTNG_ERR_SNAPSHOT_FAIL;
- break;
- }
- goto error;
- }
-
-error:
- health_code_update();
- return status;
-}
-
-/*
- * Ask the consumer the number of discarded events for a channel.
- */
-int consumer_get_discarded_events(uint64_t session_id, uint64_t channel_key,
- struct consumer_output *consumer, uint64_t *discarded)
-{
- int ret;
- struct consumer_socket *socket;
- struct lttng_ht_iter iter;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(consumer);
-
- DBG3("Consumer discarded events id %" PRIu64, session_id);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_DISCARDED_EVENTS;
- msg.u.discarded_events.session_id = session_id;
- msg.u.discarded_events.channel_key = channel_key;
-
- *discarded = 0;
-
- /* Send command for each consumer */
- rcu_read_lock();
- cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
- node.node) {
- uint64_t consumer_discarded = 0;
- pthread_mutex_lock(socket->lock);
- ret = consumer_socket_send(socket, &msg, sizeof(msg));
- if (ret < 0) {
- pthread_mutex_unlock(socket->lock);
- goto end;
- }
-
- /*
- * No need for a recv reply status because the answer to the
- * command is the reply status message.
- */
- ret = consumer_socket_recv(socket, &consumer_discarded,
- sizeof(consumer_discarded));
- if (ret < 0) {
- ERR("get discarded events");
- pthread_mutex_unlock(socket->lock);
- goto end;
- }
- pthread_mutex_unlock(socket->lock);
- *discarded += consumer_discarded;
- }
- ret = 0;
- DBG("Consumer discarded %" PRIu64 " events in session id %" PRIu64,
- *discarded, session_id);
-
-end:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Ask the consumer the number of lost packets for a channel.
- */
-int consumer_get_lost_packets(uint64_t session_id, uint64_t channel_key,
- struct consumer_output *consumer, uint64_t *lost)
-{
- int ret;
- struct consumer_socket *socket;
- struct lttng_ht_iter iter;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(consumer);
-
- DBG3("Consumer lost packets id %" PRIu64, session_id);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_LOST_PACKETS;
- msg.u.lost_packets.session_id = session_id;
- msg.u.lost_packets.channel_key = channel_key;
-
- *lost = 0;
-
- /* Send command for each consumer */
- rcu_read_lock();
- cds_lfht_for_each_entry(consumer->socks->ht, &iter.iter, socket,
- node.node) {
- uint64_t consumer_lost = 0;
- pthread_mutex_lock(socket->lock);
- ret = consumer_socket_send(socket, &msg, sizeof(msg));
- if (ret < 0) {
- pthread_mutex_unlock(socket->lock);
- goto end;
- }
-
- /*
- * No need for a recv reply status because the answer to the
- * command is the reply status message.
- */
- ret = consumer_socket_recv(socket, &consumer_lost,
- sizeof(consumer_lost));
- if (ret < 0) {
- ERR("get lost packets");
- pthread_mutex_unlock(socket->lock);
- goto end;
- }
- pthread_mutex_unlock(socket->lock);
- *lost += consumer_lost;
- }
- ret = 0;
- DBG("Consumer lost %" PRIu64 " packets in session id %" PRIu64,
- *lost, session_id);
-
-end:
- rcu_read_unlock();
- return ret;
-}
-
-/*
- * Ask the consumer to rotate a channel.
- *
- * The new_chunk_id is the session->rotate_count that has been incremented
- * when the rotation started. On the relay, this allows to keep track in which
- * chunk each stream is currently writing to (for the rotate_pending operation).
- */
-int consumer_rotate_channel(struct consumer_socket *socket, uint64_t key,
- uid_t uid, gid_t gid, struct consumer_output *output,
- bool is_metadata_channel)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
-
- DBG("Consumer rotate channel key %" PRIu64, key);
-
- pthread_mutex_lock(socket->lock);
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_ROTATE_CHANNEL;
- msg.u.rotate_channel.key = key;
- msg.u.rotate_channel.metadata = !!is_metadata_channel;
-
- if (output->type == CONSUMER_DST_NET) {
- msg.u.rotate_channel.relayd_id = output->net_seq_index;
- } else {
- msg.u.rotate_channel.relayd_id = (uint64_t) -1ULL;
- }
-
- health_code_update();
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0) {
- switch (-ret) {
- case LTTCOMM_CONSUMERD_CHAN_NOT_FOUND:
- ret = -LTTNG_ERR_CHAN_NOT_FOUND;
- break;
- default:
- ret = -LTTNG_ERR_ROTATION_FAIL_CONSUMER;
- break;
- }
- goto error;
- }
-error:
- pthread_mutex_unlock(socket->lock);
- health_code_update();
- return ret;
-}
-
-int consumer_open_channel_packets(struct consumer_socket *socket, uint64_t key)
-{
- int ret;
- const struct lttcomm_consumer_msg msg = {
- .cmd_type = LTTNG_CONSUMER_OPEN_CHANNEL_PACKETS,
- .u.open_channel_packets.key = key,
- };
-
- LTTNG_ASSERT(socket);
-
- DBG("Consumer open channel packets: channel key = %" PRIu64, key);
-
- health_code_update();
-
- pthread_mutex_lock(socket->lock);
- ret = consumer_send_msg(socket, &msg);
- pthread_mutex_unlock(socket->lock);
- if (ret < 0) {
- goto error_socket;
- }
-
-error_socket:
- health_code_update();
- return ret;
-}
-
-int consumer_clear_channel(struct consumer_socket *socket, uint64_t key)
-{
- int ret;
- struct lttcomm_consumer_msg msg;
-
- LTTNG_ASSERT(socket);
-
- DBG("Consumer clear channel %" PRIu64, key);
-
- memset(&msg, 0, sizeof(msg));
- msg.cmd_type = LTTNG_CONSUMER_CLEAR_CHANNEL;
- msg.u.clear_channel.key = key;
-
- health_code_update();
-
- pthread_mutex_lock(socket->lock);
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0) {
- goto error_socket;
- }
-
-error_socket:
- pthread_mutex_unlock(socket->lock);
-
- health_code_update();
- return ret;
-}
-
-int consumer_init(struct consumer_socket *socket,
- const lttng_uuid sessiond_uuid)
-{
- int ret;
- struct lttcomm_consumer_msg msg = {
- .cmd_type = LTTNG_CONSUMER_INIT,
- };
-
- LTTNG_ASSERT(socket);
-
- DBG("Sending consumer initialization command");
- lttng_uuid_copy(msg.u.init.sessiond_uuid, sessiond_uuid);
-
- health_code_update();
- ret = consumer_send_msg(socket, &msg);
- if (ret < 0) {
- goto error;
- }
-
-error:
- health_code_update();
- return ret;
-}
-
-/*
- * Ask the consumer to create a new chunk for a given session.
- *
- * Called with the consumer socket lock held.
- */
-int consumer_create_trace_chunk(struct consumer_socket *socket,
- uint64_t relayd_id, uint64_t session_id,
- struct lttng_trace_chunk *chunk,
- const char *domain_subdir)
-{
- int ret;
- enum lttng_trace_chunk_status chunk_status;
- struct lttng_credentials chunk_credentials;
- const struct lttng_directory_handle *chunk_directory_handle = NULL;
- struct lttng_directory_handle *domain_handle = NULL;
- int domain_dirfd;
- const char *chunk_name;
- bool chunk_name_overridden;
- uint64_t chunk_id;
- time_t creation_timestamp;
- char creation_timestamp_buffer[ISO8601_STR_LEN];
- const char *creation_timestamp_str = "(none)";
- const bool chunk_has_local_output = relayd_id == -1ULL;
- enum lttng_trace_chunk_status tc_status;
- struct lttcomm_consumer_msg msg = {
- .cmd_type = LTTNG_CONSUMER_CREATE_TRACE_CHUNK,
- .u.create_trace_chunk.session_id = session_id,
- };
-
- LTTNG_ASSERT(socket);
- LTTNG_ASSERT(chunk);
-
- if (relayd_id != -1ULL) {
- LTTNG_OPTIONAL_SET(&msg.u.create_trace_chunk.relayd_id,
- relayd_id);
- }
-
- chunk_status = lttng_trace_chunk_get_name(chunk, &chunk_name,
- &chunk_name_overridden);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK &&
- chunk_status != LTTNG_TRACE_CHUNK_STATUS_NONE) {
- ERR("Failed to get name of trace chunk");
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- if (chunk_name_overridden) {
- ret = lttng_strncpy(msg.u.create_trace_chunk.override_name,
- chunk_name,
- sizeof(msg.u.create_trace_chunk.override_name));
- if (ret) {
- ERR("Trace chunk name \"%s\" exceeds the maximal length allowed by the consumer protocol",
- chunk_name);
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- }
-
- chunk_status = lttng_trace_chunk_get_creation_timestamp(chunk,
- &creation_timestamp);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- msg.u.create_trace_chunk.creation_timestamp =
- (uint64_t) creation_timestamp;
- /* Only used for logging purposes. */
- ret = time_to_iso8601_str(creation_timestamp,
- creation_timestamp_buffer,
- sizeof(creation_timestamp_buffer));
- creation_timestamp_str = !ret ? creation_timestamp_buffer :
- "(formatting error)";
-
- chunk_status = lttng_trace_chunk_get_id(chunk, &chunk_id);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- /*
- * Anonymous trace chunks should never be transmitted
- * to remote peers (consumerd and relayd). They are used
- * internally for backward-compatibility purposes.
- */
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- msg.u.create_trace_chunk.chunk_id = chunk_id;
-
- if (chunk_has_local_output) {
- chunk_status = lttng_trace_chunk_borrow_chunk_directory_handle(
- chunk, &chunk_directory_handle);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- chunk_status = lttng_trace_chunk_get_credentials(
- chunk, &chunk_credentials);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- /*
- * Not associating credentials to a sessiond chunk is a
- * fatal internal error.
- */
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- tc_status = lttng_trace_chunk_create_subdirectory(
- chunk, domain_subdir);
- if (tc_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- PERROR("Failed to create chunk domain output directory \"%s\"",
- domain_subdir);
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- domain_handle = lttng_directory_handle_create_from_handle(
- domain_subdir,
- chunk_directory_handle);
- if (!domain_handle) {
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
-
- /*
- * This will only compile on platforms that support
- * dirfd (POSIX.2008). This is fine as the session daemon
- * is only built for such platforms.
- *
- * The ownership of the chunk directory handle's is maintained
- * by the trace chunk.
- */
- domain_dirfd = lttng_directory_handle_get_dirfd(
- domain_handle);
- LTTNG_ASSERT(domain_dirfd >= 0);
-
- msg.u.create_trace_chunk.credentials.value.uid =
- lttng_credentials_get_uid(&chunk_credentials);
- msg.u.create_trace_chunk.credentials.value.gid =
- lttng_credentials_get_gid(&chunk_credentials);
- msg.u.create_trace_chunk.credentials.is_set = 1;
- }
-
- DBG("Sending consumer create trace chunk command: relayd_id = %" PRId64
- ", session_id = %" PRIu64 ", chunk_id = %" PRIu64
- ", creation_timestamp = %s",
- relayd_id, session_id, chunk_id,
- creation_timestamp_str);
- health_code_update();
- ret = consumer_send_msg(socket, &msg);
- health_code_update();
- if (ret < 0) {
- ERR("Trace chunk creation error on consumer");
- ret = -LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER;
- goto error;
- }
-
- if (chunk_has_local_output) {
- DBG("Sending trace chunk domain directory fd to consumer");
- health_code_update();
- ret = consumer_send_fds(socket, &domain_dirfd, 1);
- health_code_update();
- if (ret < 0) {
- ERR("Trace chunk creation error on consumer");
- ret = -LTTNG_ERR_CREATE_TRACE_CHUNK_FAIL_CONSUMER;
- goto error;
- }
- }
-error:
- lttng_directory_handle_put(domain_handle);
- return ret;
-}
-
-/*
- * Ask the consumer to close a trace chunk for a given session.
- *
- * Called with the consumer socket lock held.
- */
-int consumer_close_trace_chunk(struct consumer_socket *socket,
- uint64_t relayd_id, uint64_t session_id,
- struct lttng_trace_chunk *chunk,
- char *closed_trace_chunk_path)
-{
- int ret;
- enum lttng_trace_chunk_status chunk_status;
- struct lttcomm_consumer_msg msg = {
- .cmd_type = LTTNG_CONSUMER_CLOSE_TRACE_CHUNK,
- .u.close_trace_chunk.session_id = session_id,
- };
- struct lttcomm_consumer_close_trace_chunk_reply reply;
- uint64_t chunk_id;
- time_t close_timestamp;
- enum lttng_trace_chunk_command_type close_command;
- const char *close_command_name = "none";
- struct lttng_dynamic_buffer path_reception_buffer;
-
- LTTNG_ASSERT(socket);
- lttng_dynamic_buffer_init(&path_reception_buffer);
-
- if (relayd_id != -1ULL) {
- LTTNG_OPTIONAL_SET(
- &msg.u.close_trace_chunk.relayd_id, relayd_id);
- }
-
- chunk_status = lttng_trace_chunk_get_close_command(
- chunk, &close_command);
- switch (chunk_status) {
- case LTTNG_TRACE_CHUNK_STATUS_OK:
- LTTNG_OPTIONAL_SET(&msg.u.close_trace_chunk.close_command,
- (uint32_t) close_command);
- break;
- case LTTNG_TRACE_CHUNK_STATUS_NONE:
- break;
- default:
- ERR("Failed to get trace chunk close command");
- ret = -1;
- goto error;
- }
-
- chunk_status = lttng_trace_chunk_get_id(chunk, &chunk_id);
- /*
- * Anonymous trace chunks should never be transmitted to remote peers
- * (consumerd and relayd). They are used internally for
- * backward-compatibility purposes.
- */
- LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
- msg.u.close_trace_chunk.chunk_id = chunk_id;
-
- chunk_status = lttng_trace_chunk_get_close_timestamp(chunk,
- &close_timestamp);
- /*
- * A trace chunk should be closed locally before being closed remotely.
- * Otherwise, the close timestamp would never be transmitted to the
- * peers.
- */
- LTTNG_ASSERT(chunk_status == LTTNG_TRACE_CHUNK_STATUS_OK);
- msg.u.close_trace_chunk.close_timestamp = (uint64_t) close_timestamp;
-
- if (msg.u.close_trace_chunk.close_command.is_set) {
- close_command_name = lttng_trace_chunk_command_type_get_name(
- close_command);
- }
- DBG("Sending consumer close trace chunk command: relayd_id = %" PRId64
- ", session_id = %" PRIu64 ", chunk_id = %" PRIu64
- ", close command = \"%s\"",
- relayd_id, session_id, chunk_id, close_command_name);
-
- health_code_update();
- ret = consumer_socket_send(socket, &msg, sizeof(struct lttcomm_consumer_msg));
- if (ret < 0) {
- ret = -LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
- goto error;
- }
- ret = consumer_socket_recv(socket, &reply, sizeof(reply));
- if (ret < 0) {
- ret = -LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
- goto error;
- }
- if (reply.path_length >= LTTNG_PATH_MAX) {
- ERR("Invalid path returned by relay daemon: %" PRIu32 "bytes exceeds maximal allowed length of %d bytes",
- reply.path_length, LTTNG_PATH_MAX);
- ret = -LTTNG_ERR_INVALID_PROTOCOL;
- goto error;
- }
- ret = lttng_dynamic_buffer_set_size(&path_reception_buffer,
- reply.path_length);
- if (ret) {
- ERR("Failed to allocate reception buffer of path returned by the \"close trace chunk\" command");
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
- ret = consumer_socket_recv(socket, path_reception_buffer.data,
- path_reception_buffer.size);
- if (ret < 0) {
- ERR("Communication error while receiving path of closed trace chunk");
- ret = -LTTNG_ERR_CLOSE_TRACE_CHUNK_FAIL_CONSUMER;
- goto error;
- }
- if (path_reception_buffer.data[path_reception_buffer.size - 1] != '\0') {
- ERR("Invalid path returned by relay daemon: not null-terminated");
- ret = -LTTNG_ERR_INVALID_PROTOCOL;
- goto error;
- }
- if (closed_trace_chunk_path) {
- /*
- * closed_trace_chunk_path is assumed to have a length >=
- * LTTNG_PATH_MAX
- */
- memcpy(closed_trace_chunk_path, path_reception_buffer.data,
- path_reception_buffer.size);
- }
-error:
- lttng_dynamic_buffer_reset(&path_reception_buffer);
- health_code_update();
- return ret;
-}
-
-/*
- * Ask the consumer if a trace chunk exists.
- *
- * Called with the consumer socket lock held.
- * Returns 0 on success, or a negative value on error.
- */
-int consumer_trace_chunk_exists(struct consumer_socket *socket,
- uint64_t relayd_id, uint64_t session_id,
- struct lttng_trace_chunk *chunk,
- enum consumer_trace_chunk_exists_status *result)
-{
- int ret;
- enum lttng_trace_chunk_status chunk_status;
- struct lttcomm_consumer_msg msg = {
- .cmd_type = LTTNG_CONSUMER_TRACE_CHUNK_EXISTS,
- .u.trace_chunk_exists.session_id = session_id,
- };
- uint64_t chunk_id;
- const char *consumer_reply_str;
-
- LTTNG_ASSERT(socket);
-
- if (relayd_id != -1ULL) {
- LTTNG_OPTIONAL_SET(&msg.u.trace_chunk_exists.relayd_id,
- relayd_id);
- }
-
- chunk_status = lttng_trace_chunk_get_id(chunk, &chunk_id);
- if (chunk_status != LTTNG_TRACE_CHUNK_STATUS_OK) {
- /*
- * Anonymous trace chunks should never be transmitted
- * to remote peers (consumerd and relayd). They are used
- * internally for backward-compatibility purposes.
- */
- ret = -LTTNG_ERR_FATAL;
- goto error;
- }
- msg.u.trace_chunk_exists.chunk_id = chunk_id;
-
- DBG("Sending consumer trace chunk exists command: relayd_id = %" PRId64
- ", session_id = %" PRIu64
- ", chunk_id = %" PRIu64, relayd_id, session_id, chunk_id);
-
- health_code_update();
- ret = consumer_send_msg(socket, &msg);
- switch (-ret) {
- case LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK:
- consumer_reply_str = "unknown trace chunk";
- *result = CONSUMER_TRACE_CHUNK_EXISTS_STATUS_UNKNOWN_CHUNK;
- break;
- case LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_LOCAL:
- consumer_reply_str = "trace chunk exists locally";
- *result = CONSUMER_TRACE_CHUNK_EXISTS_STATUS_EXISTS_LOCAL;
- break;
- case LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_REMOTE:
- consumer_reply_str = "trace chunk exists on remote peer";
- *result = CONSUMER_TRACE_CHUNK_EXISTS_STATUS_EXISTS_REMOTE;
- break;
- default:
- ERR("Consumer returned an error from TRACE_CHUNK_EXISTS command");
- ret = -1;
- goto error;
- }
- DBG("Consumer reply to TRACE_CHUNK_EXISTS command: %s",
- consumer_reply_str);
- ret = 0;
-error:
- health_code_update();
- return ret;
-}
projects / lttng-tools.git / blobdiff