/*
- * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 EfficiOS Inc.
* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
* Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com>
*
#include "common/buffer-view.h"
#include "common/compat/socket.h"
-#include "common/dynamic-buffer.h"
#include "common/dynamic-array.h"
-#include "common/payload.h"
-#include "common/payload-view.h"
+#include "common/dynamic-buffer.h"
#include "common/fd-handle.h"
-#include "common/sessiond-comm/sessiond-comm.h"
-#include "common/payload.h"
#include "common/payload-view.h"
+#include "common/payload.h"
+#include "common/sessiond-comm/sessiond-comm.h"
#include "lttng/lttng-error.h"
#include "lttng/tracker.h"
#include <common/compat/getenv.h>
#include <common/tracker.h>
#include <common/unix.h>
#include <common/utils.h>
+#include <lttng/error-query-internal.h>
#include <lttng/event-internal.h>
#include <lttng/session-descriptor-internal.h>
#include <lttng/session-internal.h>
#include <pthread.h>
#include <signal.h>
#include <stddef.h>
+#include <stdint.h>
#include <sys/stat.h>
#include <unistd.h>
+#include "agent-thread.h"
+#include "clear.h"
#include "client.h"
-#include "lttng-sessiond.h"
#include "cmd.h"
+#include "health-sessiond.h"
#include "kernel.h"
+#include "lttng-sessiond.h"
+#include "manage-consumer.h"
#include "save.h"
-#include "health-sessiond.h"
#include "testpoint.h"
#include "utils.h"
-#include "manage-consumer.h"
-#include "clear.h"
-#include "agent-thread.h"
static bool is_root;
return i;
}
-static int receive_userspace_probe(struct command_ctx *cmd_ctx, int sock,
- int *sock_error, struct lttng_event *event)
+static enum lttng_error_code receive_lttng_trigger(struct command_ctx *cmd_ctx,
+ int sock,
+ int *sock_error,
+ struct lttng_trigger **_trigger)
{
- int fd = -1, ret;
- struct lttng_userspace_probe_location *probe_location;
- struct lttng_payload probe_location_payload;
- struct fd_handle *handle = NULL;
-
- /*
- * Create a payload to store the serialized version of the probe
- * location.
- */
- lttng_payload_init(&probe_location_payload);
+ int ret;
+ size_t trigger_len;
+ ssize_t sock_recv_len;
+ enum lttng_error_code ret_code;
+ struct lttng_payload trigger_payload;
+ struct lttng_trigger *trigger = NULL;
- ret = lttng_dynamic_buffer_set_size(&probe_location_payload.buffer,
- cmd_ctx->lsm.u.enable.userspace_probe_location_len);
+ lttng_payload_init(&trigger_payload);
+ trigger_len = (size_t) cmd_ctx->lsm.u.trigger.length;
+ ret = lttng_dynamic_buffer_set_size(
+ &trigger_payload.buffer, trigger_len);
if (ret) {
- ret = LTTNG_ERR_NOMEM;
- goto error;
- }
-
- /*
- * Receive the probe location.
- */
- ret = lttcomm_recv_unix_sock(sock, probe_location_payload.buffer.data,
- probe_location_payload.buffer.size);
- if (ret <= 0) {
- DBG("Nothing recv() from client var len data... continuing");
- *sock_error = 1;
- ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
- goto error;
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
}
- /*
- * Receive the file descriptor to the target binary from the client.
- */
- DBG("Receiving userspace probe target FD from client ...");
- ret = lttcomm_recv_fds_unix_sock(sock, &fd, 1);
- if (ret <= 0) {
- DBG("Nothing recv() from client userspace probe fd... continuing");
+ sock_recv_len = lttcomm_recv_unix_sock(
+ sock, trigger_payload.buffer.data, trigger_len);
+ if (sock_recv_len < 0 || sock_recv_len != trigger_len) {
+ ERR("Failed to receive trigger in command payload");
*sock_error = 1;
- ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
- goto error;
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
}
- handle = fd_handle_create(fd);
- if (!handle) {
- ret = LTTNG_ERR_NOMEM;
- goto error;
+ /* Receive fds, if any. */
+ if (cmd_ctx->lsm.fd_count > 0) {
+ sock_recv_len = lttcomm_recv_payload_fds_unix_sock(
+ sock, cmd_ctx->lsm.fd_count, &trigger_payload);
+ if (sock_recv_len > 0 &&
+ sock_recv_len != cmd_ctx->lsm.fd_count * sizeof(int)) {
+ ERR("Failed to receive all file descriptors for trigger in command payload: expected fd count = %u, ret = %d",
+ cmd_ctx->lsm.fd_count, (int) ret);
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ *sock_error = 1;
+ goto end;
+ } else if (sock_recv_len <= 0) {
+ ERR("Failed to receive file descriptors for trigger in command payload: expected fd count = %u, ret = %d",
+ cmd_ctx->lsm.fd_count, (int) ret);
+ ret_code = LTTNG_ERR_FATAL;
+ *sock_error = 1;
+ goto end;
+ }
}
- /* Transferred to the handle. */
- fd = -1;
+ /* Deserialize trigger. */
+ {
+ struct lttng_payload_view view =
+ lttng_payload_view_from_payload(
+ &trigger_payload, 0, -1);
- ret = lttng_payload_push_fd_handle(&probe_location_payload, handle);
- if (ret) {
- ERR("Failed to add userspace probe file descriptor to payload");
- ret = LTTNG_ERR_NOMEM;
- goto error;
+ if (lttng_trigger_create_from_payload(&view, &trigger) !=
+ trigger_len) {
+ ERR("Invalid trigger received as part of command payload");
+ ret_code = LTTNG_ERR_INVALID_TRIGGER;
+ lttng_trigger_put(trigger);
+ goto end;
+ }
}
- fd_handle_put(handle);
- handle = NULL;
+ *_trigger = trigger;
+ ret_code = LTTNG_OK;
- {
- struct lttng_payload_view view = lttng_payload_view_from_payload(
- &probe_location_payload, 0, -1);
+end:
+ lttng_payload_reset(&trigger_payload);
+ return ret_code;
+}
+
+static enum lttng_error_code receive_lttng_error_query(struct command_ctx *cmd_ctx,
+ int sock,
+ int *sock_error,
+ struct lttng_error_query **_query)
+{
+ int ret;
+ size_t query_len;
+ ssize_t sock_recv_len;
+ enum lttng_error_code ret_code;
+ struct lttng_payload query_payload;
+ struct lttng_error_query *query = NULL;
- /* Extract the probe location from the serialized version. */
- ret = lttng_userspace_probe_location_create_from_payload(
- &view, &probe_location);
+ lttng_payload_init(&query_payload);
+ query_len = (size_t) cmd_ctx->lsm.u.error_query.length;
+ ret = lttng_dynamic_buffer_set_size(&query_payload.buffer, query_len);
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
}
- if (ret < 0) {
- WARN("Failed to create a userspace probe location from the received buffer");
- ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
- goto error;
+
+ sock_recv_len = lttcomm_recv_unix_sock(
+ sock, query_payload.buffer.data, query_len);
+ if (sock_recv_len < 0 || sock_recv_len != query_len) {
+ ERR("Failed to receive error query in command payload");
+ *sock_error = 1;
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
}
- /* Attach the probe location to the event. */
- ret = lttng_event_set_userspace_probe_location(event, probe_location);
- if (ret) {
- ret = LTTNG_ERR_PROBE_LOCATION_INVAL;
- goto error;
+ /* Receive fds, if any. */
+ if (cmd_ctx->lsm.fd_count > 0) {
+ sock_recv_len = lttcomm_recv_payload_fds_unix_sock(
+ sock, cmd_ctx->lsm.fd_count, &query_payload);
+ if (sock_recv_len > 0 &&
+ sock_recv_len != cmd_ctx->lsm.fd_count * sizeof(int)) {
+ ERR("Failed to receive all file descriptors for error query in command payload: expected fd count = %u, ret = %d",
+ cmd_ctx->lsm.fd_count, (int) ret);
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ *sock_error = 1;
+ goto end;
+ } else if (sock_recv_len <= 0) {
+ ERR("Failed to receive file descriptors for error query in command payload: expected fd count = %u, ret = %d",
+ cmd_ctx->lsm.fd_count, (int) ret);
+ ret_code = LTTNG_ERR_FATAL;
+ *sock_error = 1;
+ goto end;
+ }
}
-error:
- if (fd >= 0) {
- if (close(fd)) {
- PERROR("Failed to close userspace probe location binary fd");
+ /* Deserialize error query. */
+ {
+ struct lttng_payload_view view =
+ lttng_payload_view_from_payload(
+ &query_payload, 0, -1);
+
+ if (lttng_error_query_create_from_payload(&view, &query) !=
+ query_len) {
+ ERR("Invalid error query received as part of command payload");
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
}
}
- fd_handle_put(handle);
- lttng_payload_reset(&probe_location_payload);
- return ret;
+ *_query = query;
+ ret_code = LTTNG_OK;
+
+end:
+ lttng_payload_reset(&query_payload);
+ return ret_code;
}
-static enum lttng_error_code receive_lttng_trigger(struct command_ctx *cmd_ctx,
+static enum lttng_error_code receive_lttng_event(struct command_ctx *cmd_ctx,
int sock,
int *sock_error,
- struct lttng_trigger **_trigger)
+ struct lttng_event **out_event,
+ char **out_filter_expression,
+ struct lttng_bytecode **out_bytecode,
+ struct lttng_event_exclusion **out_exclusion)
{
int ret;
- size_t trigger_len;
+ size_t event_len;
ssize_t sock_recv_len;
enum lttng_error_code ret_code;
- struct lttng_payload trigger_payload;
- struct lttng_trigger *trigger = NULL;
+ struct lttng_payload event_payload;
- lttng_payload_init(&trigger_payload);
- trigger_len = (size_t) cmd_ctx->lsm.u.trigger.length;
- ret = lttng_dynamic_buffer_set_size(
- &trigger_payload.buffer, trigger_len);
+ lttng_payload_init(&event_payload);
+ if (cmd_ctx->lsm.cmd_type == LTTNG_ENABLE_EVENT) {
+ event_len = (size_t) cmd_ctx->lsm.u.enable.length;
+ } else if (cmd_ctx->lsm.cmd_type == LTTNG_DISABLE_EVENT) {
+ event_len = (size_t) cmd_ctx->lsm.u.disable.length;
+ } else {
+ abort();
+ }
+
+ ret = lttng_dynamic_buffer_set_size(&event_payload.buffer, event_len);
if (ret) {
ret_code = LTTNG_ERR_NOMEM;
goto end;
}
sock_recv_len = lttcomm_recv_unix_sock(
- sock, trigger_payload.buffer.data, trigger_len);
- if (sock_recv_len < 0 || sock_recv_len != trigger_len) {
- ERR("Failed to receive trigger in command payload");
+ sock, event_payload.buffer.data, event_len);
+ if (sock_recv_len < 0 || sock_recv_len != event_len) {
+ ERR("Failed to receive event in command payload");
*sock_error = 1;
ret_code = LTTNG_ERR_INVALID_PROTOCOL;
goto end;
/* Receive fds, if any. */
if (cmd_ctx->lsm.fd_count > 0) {
sock_recv_len = lttcomm_recv_payload_fds_unix_sock(
- sock, cmd_ctx->lsm.fd_count, &trigger_payload);
+ sock, cmd_ctx->lsm.fd_count, &event_payload);
if (sock_recv_len > 0 &&
sock_recv_len != cmd_ctx->lsm.fd_count * sizeof(int)) {
- ERR("Failed to receive all file descriptors for trigger in command payload: expected fd count = %u, ret = %d",
+ ERR("Failed to receive all file descriptors for event in command payload: expected fd count = %u, ret = %d",
cmd_ctx->lsm.fd_count, (int) ret);
ret_code = LTTNG_ERR_INVALID_PROTOCOL;
*sock_error = 1;
goto end;
} else if (sock_recv_len <= 0) {
- ERR("Failed to receive file descriptors for trigger in command payload: expected fd count = %u, ret = %d",
+ ERR("Failed to receive file descriptors for event in command payload: expected fd count = %u, ret = %d",
cmd_ctx->lsm.fd_count, (int) ret);
ret_code = LTTNG_ERR_FATAL;
*sock_error = 1;
}
}
- /* Deserialize trigger. */
+ /* Deserialize event. */
{
- struct lttng_payload_view view =
+ struct lttng_payload_view event_view =
lttng_payload_view_from_payload(
- &trigger_payload, 0, -1);
+ &event_payload, 0, -1);
- if (lttng_trigger_create_from_payload(&view, &trigger) !=
- trigger_len) {
- ERR("Invalid trigger received as part of command payload");
- ret_code = LTTNG_ERR_INVALID_TRIGGER;
- lttng_trigger_put(trigger);
+ if (lttng_event_create_from_payload(&event_view, out_event,
+ out_exclusion, out_filter_expression,
+ out_bytecode) != event_len) {
+ ERR("Invalid event received as part of command payload");
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
goto end;
}
}
- *_trigger = trigger;
ret_code = LTTNG_OK;
end:
+ lttng_payload_reset(&event_payload);
+ return ret_code;
+}
+
+static enum lttng_error_code receive_lttng_event_context(
+ const struct command_ctx *cmd_ctx,
+ int sock,
+ int *sock_error,
+ struct lttng_event_context **out_event_context)
+{
+ int ret;
+ const size_t event_context_len =
+ (size_t) cmd_ctx->lsm.u.context.length;
+ ssize_t sock_recv_len;
+ enum lttng_error_code ret_code;
+ struct lttng_payload event_context_payload;
+ struct lttng_event_context *context = NULL;
+
+ lttng_payload_init(&event_context_payload);
+
+ ret = lttng_dynamic_buffer_set_size(&event_context_payload.buffer,
+ event_context_len);
+ if (ret) {
+ ret_code = LTTNG_ERR_NOMEM;
+ goto end;
+ }
+
+ sock_recv_len = lttcomm_recv_unix_sock(
+ sock, event_context_payload.buffer.data,
+ event_context_len);
+ if (sock_recv_len < 0 || sock_recv_len != event_context_len) {
+ ERR("Failed to receive event context in command payload");
+ *sock_error = 1;
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ }
+
+ /* Deserialize event. */
+ {
+ ssize_t len;
+ struct lttng_payload_view event_context_view =
+ lttng_payload_view_from_payload(
+ &event_context_payload, 0, -1);
+
+ len = lttng_event_context_create_from_payload(
+ &event_context_view, &context);
+
+ if (len < 0) {
+ ERR("Failed to create a event context from the received buffer");
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ }
+
+ if (len != event_context_len) {
+ ERR("Event context from the received buffer is not the advertised length: expected length = %zu, payload length = %zd", event_context_len, len);
+ ret_code = LTTNG_ERR_INVALID_PROTOCOL;
+ goto end;
+ }
+ }
+
+ *out_event_context = context;
+ context = NULL;
+ ret_code = LTTNG_OK;
+
+end:
+ lttng_event_context_destroy(context);
+ lttng_payload_reset(&event_context_payload);
return ret_code;
}
case LTTNG_SESSION_LIST_ROTATION_SCHEDULES:
case LTTNG_CLEAR_SESSION:
case LTTNG_LIST_TRIGGERS:
+ case LTTNG_EXECUTE_ERROR_QUERY:
need_domain = false;
break;
default:
switch (cmd_ctx->lsm.cmd_type) {
case LTTNG_REGISTER_TRIGGER:
case LTTNG_UNREGISTER_TRIGGER:
+ case LTTNG_EXECUTE_ERROR_QUERY:
need_consumerd = false;
break;
default:
case LTTNG_ROTATION_GET_INFO:
case LTTNG_REGISTER_TRIGGER:
case LTTNG_LIST_TRIGGERS:
+ case LTTNG_EXECUTE_ERROR_QUERY:
break;
default:
/* Setup lttng message with no payload */
case LTTNG_REGISTER_TRIGGER:
case LTTNG_UNREGISTER_TRIGGER:
case LTTNG_LIST_TRIGGERS:
+ case LTTNG_EXECUTE_ERROR_QUERY:
need_tracing_session = false;
break;
default:
switch (cmd_ctx->lsm.cmd_type) {
case LTTNG_ADD_CONTEXT:
{
- /*
- * An LTTNG_ADD_CONTEXT command might have a supplementary
- * payload if the context being added is an application context.
- */
- if (cmd_ctx->lsm.u.context.ctx.ctx ==
- LTTNG_EVENT_CONTEXT_APP_CONTEXT) {
- char *provider_name = NULL, *context_name = NULL;
- size_t provider_name_len =
- cmd_ctx->lsm.u.context.provider_name_len;
- size_t context_name_len =
- cmd_ctx->lsm.u.context.context_name_len;
-
- if (provider_name_len == 0 || context_name_len == 0) {
- /*
- * Application provider and context names MUST
- * be provided.
- */
- ret = -LTTNG_ERR_INVALID;
- goto error;
- }
-
- provider_name = zmalloc(provider_name_len + 1);
- if (!provider_name) {
- ret = -LTTNG_ERR_NOMEM;
- goto error;
- }
- cmd_ctx->lsm.u.context.ctx.u.app_ctx.provider_name =
- provider_name;
-
- context_name = zmalloc(context_name_len + 1);
- if (!context_name) {
- ret = -LTTNG_ERR_NOMEM;
- goto error_add_context;
- }
- cmd_ctx->lsm.u.context.ctx.u.app_ctx.ctx_name =
- context_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,
- context_name_len);
- if (ret < 0) {
- goto error_add_context;
- }
- }
+ struct lttng_event_context *event_context = NULL;
+ const enum lttng_error_code ret_code =
+ receive_lttng_event_context(
+ cmd_ctx, *sock, sock_error, &event_context);
- /*
- * cmd_add_context assumes ownership of the provider and context
- * names.
- */
- ret = cmd_add_context(cmd_ctx->session,
- cmd_ctx->lsm.domain.type,
- cmd_ctx->lsm.u.context.channel_name,
- ALIGNED_CONST_PTR(cmd_ctx->lsm.u.context.ctx),
- the_kernel_poll_pipe[1]);
-
- cmd_ctx->lsm.u.context.ctx.u.app_ctx.provider_name = NULL;
- cmd_ctx->lsm.u.context.ctx.u.app_ctx.ctx_name = NULL;
-error_add_context:
- free(cmd_ctx->lsm.u.context.ctx.u.app_ctx.provider_name);
- free(cmd_ctx->lsm.u.context.ctx.u.app_ctx.ctx_name);
- if (ret < 0) {
+ if (ret_code != LTTNG_OK) {
+ ret = (int) ret_code;
goto error;
}
+
+ ret = cmd_add_context(cmd_ctx, event_context, the_kernel_poll_pipe[1]);
+ lttng_event_context_destroy(event_context);
break;
}
case LTTNG_DISABLE_CHANNEL:
cmd_ctx->lsm.u.disable.channel_name);
break;
}
- case LTTNG_DISABLE_EVENT:
- {
-
- /*
- * FIXME: handle filter; for now we just receive the filter's
- * bytecode along with the filter expression which are sent by
- * liblttng-ctl and discard them.
- *
- * This fixes an issue where the client may block while sending
- * the filter payload and encounter an error because the session
- * daemon closes the socket without ever handling this data.
- */
- size_t count = cmd_ctx->lsm.u.disable.expression_len +
- cmd_ctx->lsm.u.disable.bytecode_len;
-
- if (count) {
- char data[LTTNG_FILTER_MAX_LEN];
-
- DBG("Discarding disable event command payload of size %zu", count);
- while (count) {
- ret = lttcomm_recv_unix_sock(*sock, data,
- count > sizeof(data) ? sizeof(data) : count);
- if (ret < 0) {
- goto error;
- }
-
- count -= (size_t) ret;
- }
- }
- ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm.domain.type,
- cmd_ctx->lsm.u.disable.channel_name,
- ALIGNED_CONST_PTR(cmd_ctx->lsm.u.disable.event));
- break;
- }
case LTTNG_ENABLE_CHANNEL:
{
- cmd_ctx->lsm.u.channel.chan.attr.extended.ptr =
- (struct lttng_channel_extended *) &cmd_ctx->lsm.u.channel.extended;
- ret = cmd_enable_channel(cmd_ctx->session,
- ALIGNED_CONST_PTR(cmd_ctx->lsm.domain),
- ALIGNED_CONST_PTR(cmd_ctx->lsm.u.channel.chan),
- the_kernel_poll_pipe[1]);
+ ret = cmd_enable_channel(
+ cmd_ctx, *sock, the_kernel_poll_pipe[1]);
break;
}
case LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE:
break;
}
case LTTNG_ENABLE_EVENT:
+ case LTTNG_DISABLE_EVENT:
{
- struct lttng_event *ev = NULL;
- struct lttng_event_exclusion *exclusion = NULL;
- struct lttng_bytecode *bytecode = NULL;
- char *filter_expression = NULL;
-
- /* Handle exclusion events and receive it from the client. */
- if (cmd_ctx->lsm.u.enable.exclusion_count > 0) {
- size_t count = cmd_ctx->lsm.u.enable.exclusion_count;
-
- exclusion = zmalloc(sizeof(struct lttng_event_exclusion) +
- (count * LTTNG_SYMBOL_NAME_LEN));
- if (!exclusion) {
- ret = LTTNG_ERR_EXCLUSION_NOMEM;
- goto error;
- }
-
- DBG("Receiving var len exclusion event list from client ...");
- exclusion->count = count;
- 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");
- *sock_error = 1;
- free(exclusion);
- ret = LTTNG_ERR_EXCLUSION_INVAL;
- goto error;
- }
- }
-
- /* Get filter expression from client. */
- if (cmd_ctx->lsm.u.enable.expression_len > 0) {
- size_t expression_len =
- cmd_ctx->lsm.u.enable.expression_len;
-
- if (expression_len > LTTNG_FILTER_MAX_LEN) {
- ret = LTTNG_ERR_FILTER_INVAL;
- free(exclusion);
- goto error;
- }
-
- filter_expression = zmalloc(expression_len);
- if (!filter_expression) {
- free(exclusion);
- ret = LTTNG_ERR_FILTER_NOMEM;
- goto error;
- }
-
- /* Receive var. len. data */
- DBG("Receiving var len filter's expression from client ...");
- ret = lttcomm_recv_unix_sock(*sock, filter_expression,
- expression_len);
- if (ret <= 0) {
- DBG("Nothing recv() from client var len data... continuing");
- *sock_error = 1;
- free(filter_expression);
- free(exclusion);
- ret = LTTNG_ERR_FILTER_INVAL;
- goto error;
- }
- }
-
- /* Handle filter and get bytecode from client. */
- if (cmd_ctx->lsm.u.enable.bytecode_len > 0) {
- size_t bytecode_len = cmd_ctx->lsm.u.enable.bytecode_len;
-
- if (bytecode_len > LTTNG_FILTER_MAX_LEN) {
- ret = LTTNG_ERR_FILTER_INVAL;
- free(filter_expression);
- free(exclusion);
- goto error;
- }
-
- bytecode = zmalloc(bytecode_len);
- if (!bytecode) {
- free(filter_expression);
- free(exclusion);
- ret = LTTNG_ERR_FILTER_NOMEM;
- goto error;
- }
-
- /* Receive var. len. data */
- DBG("Receiving var len filter's bytecode from client ...");
- ret = lttcomm_recv_unix_sock(*sock, bytecode, bytecode_len);
- if (ret <= 0) {
- DBG("Nothing recv() from client var len data... continuing");
- *sock_error = 1;
- free(filter_expression);
- free(bytecode);
- free(exclusion);
- ret = LTTNG_ERR_FILTER_INVAL;
- goto error;
- }
+ struct lttng_event *event;
+ char *filter_expression;
+ struct lttng_event_exclusion *exclusions;
+ struct lttng_bytecode *bytecode;
+ const enum lttng_error_code ret_code = receive_lttng_event(
+ cmd_ctx, *sock, sock_error, &event,
+ &filter_expression, &bytecode, &exclusions);
- if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) {
- free(filter_expression);
- free(bytecode);
- free(exclusion);
- ret = LTTNG_ERR_FILTER_INVAL;
- goto error;
- }
- }
-
- ev = lttng_event_copy(ALIGNED_CONST_PTR(cmd_ctx->lsm.u.enable.event));
- if (!ev) {
- DBG("Failed to copy event: %s",
- cmd_ctx->lsm.u.enable.event.name);
- free(filter_expression);
- free(bytecode);
- free(exclusion);
- ret = LTTNG_ERR_NOMEM;
+ if (ret_code != LTTNG_OK) {
+ ret = (int) ret_code;
goto error;
}
-
- 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);
- if (ret) {
- free(filter_expression);
- free(bytecode);
- free(exclusion);
- lttng_event_destroy(ev);
- goto error;
- }
- }
-
- ret = cmd_enable_event(cmd_ctx->session,
- ALIGNED_CONST_PTR(cmd_ctx->lsm.domain),
- cmd_ctx->lsm.u.enable.channel_name,
- ev,
- filter_expression, bytecode, exclusion,
- the_kernel_poll_pipe[1]);
- lttng_event_destroy(ev);
+ /*
+ * Ownership of filter_expression, exclusions, and bytecode is
+ * always transferred.
+ */
+ ret = cmd_ctx->lsm.cmd_type == LTTNG_ENABLE_EVENT ?
+ cmd_enable_event(cmd_ctx, event,
+ filter_expression, exclusions,
+ bytecode,
+ the_kernel_poll_pipe[1]) :
+ cmd_disable_event(cmd_ctx, event,
+ filter_expression, bytecode,
+ exclusions);
+ lttng_event_destroy(event);
break;
}
case LTTNG_LIST_TRACEPOINTS:
{
- struct lttng_event *events;
- ssize_t nb_events;
+ enum lttng_error_code ret_code;
+ size_t original_payload_size;
+ size_t payload_size;
+ const size_t command_header_size = sizeof(struct lttcomm_list_command_header);
+
+ ret = setup_empty_lttng_msg(cmd_ctx);
+ if (ret) {
+ ret = LTTNG_ERR_NOMEM;
+ goto setup_error;
+ }
+
+ original_payload_size = cmd_ctx->reply_payload.buffer.size;
session_lock_list();
- nb_events = cmd_list_tracepoints(cmd_ctx->lsm.domain.type, &events);
+ ret_code = cmd_list_tracepoints(cmd_ctx->lsm.domain.type,
+ &cmd_ctx->reply_payload);
session_unlock_list();
- if (nb_events < 0) {
- /* Return value is a negative lttng_error_code. */
- ret = -nb_events;
+ if (ret_code != LTTNG_OK) {
+ ret = (int) ret_code;
goto error;
}
- /*
- * Setup lttng message with payload size set to the event list size in
- * bytes and then copy list into the llm payload.
- */
- ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events,
- sizeof(struct lttng_event) * nb_events);
- free(events);
-
- if (ret < 0) {
- goto setup_error;
- }
+ payload_size = cmd_ctx->reply_payload.buffer.size -
+ command_header_size - original_payload_size;
+ update_lttng_msg(cmd_ctx, command_header_size, payload_size);
ret = LTTNG_OK;
break;
}
case LTTNG_LIST_TRACEPOINT_FIELDS:
{
- struct lttng_event_field *fields;
- ssize_t nb_fields;
+ enum lttng_error_code ret_code;
+ size_t original_payload_size;
+ size_t payload_size;
+ const size_t command_header_size = sizeof(struct lttcomm_list_command_header);
+
+ ret = setup_empty_lttng_msg(cmd_ctx);
+ if (ret) {
+ ret = LTTNG_ERR_NOMEM;
+ goto setup_error;
+ }
+
+ original_payload_size = cmd_ctx->reply_payload.buffer.size;
session_lock_list();
- nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm.domain.type,
- &fields);
+ ret_code = cmd_list_tracepoint_fields(
+ cmd_ctx->lsm.domain.type, &cmd_ctx->reply_payload);
session_unlock_list();
- if (nb_fields < 0) {
- /* Return value is a negative lttng_error_code. */
- ret = -nb_fields;
+ if (ret_code != LTTNG_OK) {
+ ret = (int) ret_code;
goto error;
}
- /*
- * Setup lttng message with payload size set to the event list size in
- * bytes and then copy list into the llm payload.
- */
- ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields,
- sizeof(struct lttng_event_field) * nb_fields);
- free(fields);
-
- if (ret < 0) {
- goto setup_error;
- }
+ payload_size = cmd_ctx->reply_payload.buffer.size -
+ command_header_size - original_payload_size;
+ update_lttng_msg(cmd_ctx, command_header_size, payload_size);
ret = LTTNG_OK;
break;
}
case LTTNG_LIST_SYSCALLS:
{
- struct lttng_event *events;
- ssize_t nb_events;
+ enum lttng_error_code ret_code;
+ size_t original_payload_size;
+ size_t payload_size;
+ const size_t command_header_size = sizeof(struct lttcomm_list_command_header);
- nb_events = cmd_list_syscalls(&events);
- if (nb_events < 0) {
- /* Return value is a negative lttng_error_code. */
- ret = -nb_events;
- goto error;
+ ret = setup_empty_lttng_msg(cmd_ctx);
+ if (ret) {
+ ret = LTTNG_ERR_NOMEM;
+ goto setup_error;
}
- /*
- * Setup lttng message with payload size set to the event list size in
- * bytes and then copy list into the llm payload.
- */
- ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events,
- sizeof(struct lttng_event) * nb_events);
- free(events);
+ original_payload_size = cmd_ctx->reply_payload.buffer.size;
- if (ret < 0) {
- goto setup_error;
+ ret_code = cmd_list_syscalls(&cmd_ctx->reply_payload);
+ if (ret_code != LTTNG_OK) {
+ ret = (int) ret_code;
+ goto error;
}
+ payload_size = cmd_ctx->reply_payload.buffer.size -
+ command_header_size - original_payload_size;
+ update_lttng_msg(cmd_ctx, command_header_size, payload_size);
+
ret = LTTNG_OK;
break;
}
}
case LTTNG_LIST_CHANNELS:
{
- ssize_t payload_size;
- struct lttng_channel *channels = NULL;
+ enum lttng_error_code ret_code;
+ size_t original_payload_size;
+ size_t payload_size;
+ const size_t command_header_size = sizeof(struct lttcomm_list_command_header);
- payload_size = cmd_list_channels(cmd_ctx->lsm.domain.type,
- cmd_ctx->session, &channels);
- if (payload_size < 0) {
- /* Return value is a negative lttng_error_code. */
- ret = -payload_size;
- goto error;
+ ret = setup_empty_lttng_msg(cmd_ctx);
+ if (ret) {
+ ret = LTTNG_ERR_NOMEM;
+ goto setup_error;
}
- ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels,
- payload_size);
- free(channels);
+ original_payload_size = cmd_ctx->reply_payload.buffer.size;
- if (ret < 0) {
- goto setup_error;
+ ret_code = cmd_list_channels(cmd_ctx->lsm.domain.type,
+ cmd_ctx->session, &cmd_ctx->reply_payload);
+ if (ret_code != LTTNG_OK) {
+ ret = (int) ret_code;
+ goto error;
}
+ payload_size = cmd_ctx->reply_payload.buffer.size -
+ command_header_size - original_payload_size;
+ update_lttng_msg(cmd_ctx, command_header_size, payload_size);
+
ret = LTTNG_OK;
break;
}
case LTTNG_LIST_EVENTS:
{
- ssize_t list_ret;
- struct lttcomm_event_command_header cmd_header = {};
+ enum lttng_error_code ret_code;
size_t original_payload_size;
size_t payload_size;
+ const size_t command_header_size = sizeof(struct lttcomm_list_command_header);
ret = setup_empty_lttng_msg(cmd_ctx);
if (ret) {
original_payload_size = cmd_ctx->reply_payload.buffer.size;
- /* Extended infos are included at the end of the payload. */
- list_ret = cmd_list_events(cmd_ctx->lsm.domain.type,
+ ret_code = cmd_list_events(cmd_ctx->lsm.domain.type,
cmd_ctx->session,
- cmd_ctx->lsm.u.list.channel_name,
- &cmd_ctx->reply_payload);
- if (list_ret < 0) {
- /* Return value is a negative lttng_error_code. */
- ret = -list_ret;
+ cmd_ctx->lsm.u.list.channel_name, &cmd_ctx->reply_payload);
+ if (ret_code != LTTNG_OK) {
+ ret = (int) ret_code;
goto error;
}
payload_size = cmd_ctx->reply_payload.buffer.size -
- sizeof(cmd_header) - original_payload_size;
- update_lttng_msg(cmd_ctx, sizeof(cmd_header), payload_size);
+ command_header_size - original_payload_size;
+ update_lttng_msg(cmd_ctx, command_header_size, payload_size);
ret = LTTNG_OK;
break;
original_reply_payload_size = cmd_ctx->reply_payload.buffer.size;
ret = cmd_register_trigger(&cmd_creds, payload_trigger,
+ cmd_ctx->lsm.u.trigger.is_trigger_anonymous,
the_notification_thread_handle,
&return_trigger);
if (ret != LTTNG_OK) {
ret = LTTNG_OK;
break;
}
+ case LTTNG_EXECUTE_ERROR_QUERY:
+ {
+ struct lttng_error_query *query;
+ const struct lttng_credentials cmd_creds = {
+ .uid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.uid),
+ .gid = LTTNG_OPTIONAL_INIT_VALUE(cmd_ctx->creds.gid),
+ };
+ struct lttng_error_query_results *results = NULL;
+ size_t original_payload_size;
+ size_t payload_size;
+
+ ret = setup_empty_lttng_msg(cmd_ctx);
+ if (ret) {
+ ret = LTTNG_ERR_NOMEM;
+ goto setup_error;
+ }
+
+ original_payload_size = cmd_ctx->reply_payload.buffer.size;
+
+ ret = receive_lttng_error_query(
+ cmd_ctx, *sock, sock_error, &query);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
+ ret = cmd_execute_error_query(&cmd_creds, query, &results,
+ the_notification_thread_handle);
+ lttng_error_query_destroy(query);
+ if (ret != LTTNG_OK) {
+ goto error;
+ }
+
+ assert(results);
+ ret = lttng_error_query_results_serialize(
+ results, &cmd_ctx->reply_payload);
+ lttng_error_query_results_destroy(results);
+ if (ret) {
+ ERR("Failed to serialize error query result set in reply to `execute error query` command");
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ payload_size = cmd_ctx->reply_payload.buffer.size -
+ original_payload_size;
+
+ update_lttng_msg(cmd_ctx, 0, payload_size);
+
+ ret = LTTNG_OK;
+
+ break;
+ }
default:
ret = LTTNG_ERR_UND;
break;
projects / lttng-tools.git / blobdiff