#include <common/utils.h>
#include <lttng/userspace-probe-internal.h>
#include <lttng/event-internal.h>
+#include <lttng/session-internal.h>
+#include <lttng/session-descriptor-internal.h>
#include "client.h"
#include "lttng-sessiond.h"
const size_t payload_offset = cmd_header_offset + cmd_header_len;
const size_t total_msg_size = header_len + cmd_header_len + payload_len;
+ free(cmd_ctx->llm);
cmd_ctx->llm = zmalloc(total_msg_size);
if (cmd_ctx->llm == NULL) {
}
/* Append correct directory to subdir */
- strncat(consumer->subdir, dir_name,
- sizeof(consumer->subdir) - strlen(consumer->subdir) - 1);
- DBG3("Copy session consumer subdir %s", consumer->subdir);
-
+ ret = lttng_strncpy(consumer->domain_subdir, dir_name,
+ sizeof(consumer->domain_subdir));
+ if (ret) {
+ ret = LTTNG_ERR_UNK;
+ goto error;
+ }
+ DBG3("Copy session consumer subdir %s", consumer->domain_subdir);
ret = LTTNG_OK;
error:
ret = kernel_create_session(session, kernel_tracer_fd);
if (ret < 0) {
ret = LTTNG_ERR_KERN_SESS_FAIL;
- goto error;
+ goto error_create;
}
/* Code flow safety */
error:
trace_kernel_destroy_session(session->kernel_session);
session->kernel_session = NULL;
+error_create:
return ret;
}
* Return any error encountered or 0 for success.
*
* "sock" is only used for special-case var. len data.
+ * A command may assume the ownership of the socket, in which case its value
+ * should be set to -1.
*
* Should *NOT* be called with RCU read-side lock held.
*/
-static int process_client_msg(struct command_ctx *cmd_ctx, int sock,
+static int process_client_msg(struct command_ctx *cmd_ctx, int *sock,
int *sock_error)
{
int ret = LTTNG_OK;
*sock_error = 0;
switch (cmd_ctx->lsm->cmd_type) {
- case LTTNG_CREATE_SESSION:
- case LTTNG_CREATE_SESSION_SNAPSHOT:
- case LTTNG_CREATE_SESSION_LIVE:
+ case LTTNG_CREATE_SESSION_EXT:
case LTTNG_DESTROY_SESSION:
case LTTNG_LIST_SESSIONS:
case LTTNG_LIST_DOMAINS:
/* Commands that DO NOT need a session. */
switch (cmd_ctx->lsm->cmd_type) {
- case LTTNG_CREATE_SESSION:
- case LTTNG_CREATE_SESSION_SNAPSHOT:
- case LTTNG_CREATE_SESSION_LIVE:
+ case LTTNG_CREATE_SESSION_EXT:
case LTTNG_LIST_SESSIONS:
case LTTNG_LIST_TRACEPOINTS:
case LTTNG_LIST_SYSCALLS:
if (need_tracing_session) {
if (cmd_ctx->session->kernel_session == NULL) {
ret = create_kernel_session(cmd_ctx->session);
- if (ret < 0) {
+ if (ret != LTTNG_OK) {
ret = LTTNG_ERR_KERN_SESS_FAIL;
goto error;
}
cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name =
context_name;
- ret = lttcomm_recv_unix_sock(sock, provider_name,
+ ret = lttcomm_recv_unix_sock(*sock, provider_name,
provider_name_len);
if (ret < 0) {
goto error_add_context;
}
- ret = lttcomm_recv_unix_sock(sock, context_name,
+ ret = lttcomm_recv_unix_sock(*sock, context_name,
context_name_len);
if (ret < 0) {
goto error_add_context;
DBG("Discarding disable event command payload of size %zu", count);
while (count) {
- ret = lttcomm_recv_unix_sock(sock, data,
+ ret = lttcomm_recv_unix_sock(*sock, data,
count > sizeof(data) ? sizeof(data) : count);
if (ret < 0) {
goto error;
DBG("Receiving var len exclusion event list from client ...");
exclusion->count = count;
- ret = lttcomm_recv_unix_sock(sock, exclusion->names,
+ ret = lttcomm_recv_unix_sock(*sock, exclusion->names,
count * LTTNG_SYMBOL_NAME_LEN);
if (ret <= 0) {
DBG("Nothing recv() from client var len data... continuing");
/* Receive var. len. data */
DBG("Receiving var len filter's expression from client ...");
- ret = lttcomm_recv_unix_sock(sock, filter_expression,
+ ret = lttcomm_recv_unix_sock(*sock, filter_expression,
expression_len);
if (ret <= 0) {
DBG("Nothing recv() from client var len data... continuing");
/* Receive var. len. data */
DBG("Receiving var len filter's bytecode from client ...");
- ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len);
+ ret = lttcomm_recv_unix_sock(*sock, bytecode, bytecode_len);
if (ret <= 0) {
DBG("Nothing recv() from client var len data... continuing");
*sock_error = 1;
if (cmd_ctx->lsm->u.enable.userspace_probe_location_len > 0) {
/* Expect a userspace probe description. */
- ret = receive_userspace_probe(cmd_ctx, sock, sock_error, ev);
+ ret = receive_userspace_probe(cmd_ctx, *sock, sock_error, ev);
if (ret) {
free(filter_expression);
free(bytecode);
/* Receive variable len data */
DBG("Receiving %zu URI(s) from client ...", nb_uri);
- ret = lttcomm_recv_unix_sock(sock, uris, len);
+ ret = lttcomm_recv_unix_sock(*sock, uris, len);
if (ret <= 0) {
DBG("No URIs received from client... continuing");
*sock_error = 1;
ret = cmd_stop_trace(cmd_ctx->session);
break;
}
- case LTTNG_CREATE_SESSION:
- {
- size_t nb_uri, len;
- struct lttng_uri *uris = NULL;
-
- nb_uri = cmd_ctx->lsm->u.uri.size;
- len = nb_uri * sizeof(struct lttng_uri);
-
- if (nb_uri > 0) {
- uris = zmalloc(len);
- if (uris == NULL) {
- ret = LTTNG_ERR_FATAL;
- goto error;
- }
-
- /* Receive variable len data */
- DBG("Waiting for %zu URIs from client ...", nb_uri);
- ret = lttcomm_recv_unix_sock(sock, uris, len);
- if (ret <= 0) {
- DBG("No URIs received from client... continuing");
- *sock_error = 1;
- ret = LTTNG_ERR_SESSION_FAIL;
- free(uris);
- goto error;
- }
-
- if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) {
- DBG("Creating session with ONE network URI is a bad call");
- ret = LTTNG_ERR_SESSION_FAIL;
- free(uris);
- goto error;
- }
- }
-
- ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri,
- &cmd_ctx->creds, 0);
-
- free(uris);
-
- break;
- }
case LTTNG_DESTROY_SESSION:
{
ret = cmd_destroy_session(cmd_ctx->session,
- notification_thread_handle);
+ notification_thread_handle,
+ sock);
break;
}
case LTTNG_LIST_DOMAINS:
nr_sessions = lttng_sessions_count(
LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds),
LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds));
- payload_len = sizeof(struct lttng_session) * nr_sessions;
+
+ payload_len = (sizeof(struct lttng_session) * nr_sessions) +
+ (sizeof(struct lttng_session_extended) * nr_sessions);
sessions_payload = zmalloc(payload_len);
if (!sessions_payload) {
goto setup_error;
}
- cmd_list_lttng_sessions(sessions_payload,
+ cmd_list_lttng_sessions(sessions_payload, nr_sessions,
LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds),
LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds));
session_unlock_list();
cmd_ctx->lsm->u.snapshot_record.wait);
break;
}
- case LTTNG_CREATE_SESSION_SNAPSHOT:
+ case LTTNG_CREATE_SESSION_EXT:
{
- size_t nb_uri, len;
- struct lttng_uri *uris = NULL;
-
- nb_uri = cmd_ctx->lsm->u.uri.size;
- len = nb_uri * sizeof(struct lttng_uri);
+ struct lttng_dynamic_buffer payload;
+ struct lttng_session_descriptor *return_descriptor = NULL;
- if (nb_uri > 0) {
- uris = zmalloc(len);
- if (uris == NULL) {
- ret = LTTNG_ERR_FATAL;
- goto error;
- }
-
- /* Receive variable len data */
- DBG("Waiting for %zu URIs from client ...", nb_uri);
- ret = lttcomm_recv_unix_sock(sock, uris, len);
- if (ret <= 0) {
- DBG("No URIs received from client... continuing");
- *sock_error = 1;
- ret = LTTNG_ERR_SESSION_FAIL;
- free(uris);
- goto error;
- }
-
- if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) {
- DBG("Creating session with ONE network URI is a bad call");
- ret = LTTNG_ERR_SESSION_FAIL;
- free(uris);
- goto error;
- }
+ lttng_dynamic_buffer_init(&payload);
+ ret = cmd_create_session(cmd_ctx, *sock, &return_descriptor);
+ if (ret != LTTNG_OK) {
+ goto error;
}
- ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris,
- nb_uri, &cmd_ctx->creds);
- free(uris);
- break;
- }
- case LTTNG_CREATE_SESSION_LIVE:
- {
- size_t nb_uri, len;
- struct lttng_uri *uris = NULL;
-
- nb_uri = cmd_ctx->lsm->u.uri.size;
- len = nb_uri * sizeof(struct lttng_uri);
-
- if (nb_uri > 0) {
- uris = zmalloc(len);
- if (uris == NULL) {
- ret = LTTNG_ERR_FATAL;
- goto error;
- }
-
- /* Receive variable len data */
- DBG("Waiting for %zu URIs from client ...", nb_uri);
- ret = lttcomm_recv_unix_sock(sock, uris, len);
- if (ret <= 0) {
- DBG("No URIs received from client... continuing");
- *sock_error = 1;
- ret = LTTNG_ERR_SESSION_FAIL;
- free(uris);
- goto error;
- }
-
- if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) {
- DBG("Creating session with ONE network URI is a bad call");
- ret = LTTNG_ERR_SESSION_FAIL;
- free(uris);
- goto error;
- }
+ ret = lttng_session_descriptor_serialize(return_descriptor,
+ &payload);
+ if (ret) {
+ ERR("Failed to serialize session descriptor in reply to \"create session\" command");
+ lttng_session_descriptor_destroy(return_descriptor);
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
}
-
- ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris,
- nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval);
- free(uris);
+ ret = setup_lttng_msg_no_cmd_header(cmd_ctx, payload.data,
+ payload.size);
+ if (ret) {
+ lttng_session_descriptor_destroy(return_descriptor);
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+ lttng_dynamic_buffer_reset(&payload);
+ lttng_session_descriptor_destroy(return_descriptor);
+ ret = LTTNG_OK;
break;
}
case LTTNG_SAVE_SESSION:
}
case LTTNG_REGISTER_TRIGGER:
{
- ret = cmd_register_trigger(cmd_ctx, sock,
+ ret = cmd_register_trigger(cmd_ctx, *sock,
notification_thread_handle);
break;
}
case LTTNG_UNREGISTER_TRIGGER:
{
- ret = cmd_unregister_trigger(cmd_ctx, sock,
+ ret = cmd_unregister_trigger(cmd_ctx, *sock,
notification_thread_handle);
break;
}
if (cmd_ctx->session) {
session_unlock(cmd_ctx->session);
session_put(cmd_ctx->session);
+ cmd_ctx->session = NULL;
}
if (need_tracing_session) {
session_unlock_list();
health_code_update();
- if (!revents) {
- /* No activity for this FD (poll implementation). */
- continue;
- }
-
if (pollfd == thread_quit_pipe_fd) {
err = 0;
goto exit;
* informations for the client. The command context struct contains
* everything this function may needs.
*/
- ret = process_client_msg(cmd_ctx, sock, &sock_error);
+ ret = process_client_msg(cmd_ctx, &sock, &sock_error);
rcu_thread_offline();
if (ret < 0) {
- ret = close(sock);
- if (ret) {
- PERROR("close");
- }
- sock = -1;
+ if (sock >= 0) {
+ ret = close(sock);
+ if (ret) {
+ PERROR("close");
+ }
+ }
+ sock = -1;
/*
* TODO: Inform client somehow of the fatal error. At
* this point, ret < 0 means that a zmalloc failed
health_code_update();
- DBG("Sending response (size: %d, retcode: %s (%d))",
- cmd_ctx->lttng_msg_size,
- lttng_strerror(-cmd_ctx->llm->ret_code),
- cmd_ctx->llm->ret_code);
- ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size);
- if (ret < 0) {
- ERR("Failed to send data back to client");
- }
+ if (sock >= 0) {
+ DBG("Sending response (size: %d, retcode: %s (%d))",
+ cmd_ctx->lttng_msg_size,
+ lttng_strerror(-cmd_ctx->llm->ret_code),
+ cmd_ctx->llm->ret_code);
+ ret = send_unix_sock(sock, cmd_ctx->llm,
+ cmd_ctx->lttng_msg_size);
+ if (ret < 0) {
+ ERR("Failed to send data back to client");
+ }
- /* End of transmission */
- ret = close(sock);
- if (ret) {
- PERROR("close");
- }
- sock = -1;
+ /* End of transmission */
+ ret = close(sock);
+ if (ret) {
+ PERROR("close");
+ }
+ }
+ sock = -1;
clean_command_ctx(&cmd_ctx);
projects / lttng-tools.git / blobdiff