/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- * Julien Desfossez <julien.desfossez@polymtl.ca>
- * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License, version 2 only,
- * as published by the Free Software Foundation.
+ * SPDX-License-Identifier: GPL-2.0-only
*
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
/*
#include <common/compat/socket.h>
#include <common/uri.h>
#include <common/defaults.h>
-#include <common/compat/uuid.h>
+#include <common/uuid.h>
+#include <common/macros.h>
+#include <common/optional.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#define LTTNG_SESSIOND_COMM_MAX_LISTEN 64
/* Maximum number of FDs that can be sent over a Unix socket */
-#define LTTCOMM_MAX_SEND_FDS 4
+#if defined(__linux__)
+/* Based on the kernel's SCM_MAX_FD which is 253 since 2.6.38 (255 before) */
+#define LTTCOMM_MAX_SEND_FDS 253
+#else
+#define LTTCOMM_MAX_SEND_FDS 16
+#endif
/*
* Get the error code index from 0 since LTTCOMM_OK start at 1000
enum lttcomm_sessiond_command {
/* Tracer command */
- LTTNG_ADD_CONTEXT = 0,
+ LTTNG_ADD_CONTEXT = 0,
/* LTTNG_CALIBRATE used to be here */
- LTTNG_DISABLE_CHANNEL = 2,
- LTTNG_DISABLE_EVENT = 3,
- LTTNG_LIST_SYSCALLS = 4,
- LTTNG_ENABLE_CHANNEL = 5,
- LTTNG_ENABLE_EVENT = 6,
+ LTTNG_DISABLE_CHANNEL = 2,
+ LTTNG_DISABLE_EVENT = 3,
+ LTTNG_LIST_SYSCALLS = 4,
+ LTTNG_ENABLE_CHANNEL = 5,
+ LTTNG_ENABLE_EVENT = 6,
/* 7 */
/* Session daemon command */
- LTTNG_CREATE_SESSION = 8,
- LTTNG_DESTROY_SESSION = 9,
- LTTNG_LIST_CHANNELS = 10,
- LTTNG_LIST_DOMAINS = 11,
- LTTNG_LIST_EVENTS = 12,
- LTTNG_LIST_SESSIONS = 13,
- LTTNG_LIST_TRACEPOINTS = 14,
- LTTNG_REGISTER_CONSUMER = 15,
- LTTNG_START_TRACE = 16,
- LTTNG_STOP_TRACE = 17,
- LTTNG_LIST_TRACEPOINT_FIELDS = 18,
+ /* 8 */
+ LTTNG_DESTROY_SESSION = 9,
+ LTTNG_LIST_CHANNELS = 10,
+ LTTNG_LIST_DOMAINS = 11,
+ LTTNG_LIST_EVENTS = 12,
+ LTTNG_LIST_SESSIONS = 13,
+ LTTNG_LIST_TRACEPOINTS = 14,
+ LTTNG_REGISTER_CONSUMER = 15,
+ LTTNG_START_TRACE = 16,
+ LTTNG_STOP_TRACE = 17,
+ LTTNG_LIST_TRACEPOINT_FIELDS = 18,
/* Consumer */
- LTTNG_DISABLE_CONSUMER = 19,
- LTTNG_ENABLE_CONSUMER = 20,
- LTTNG_SET_CONSUMER_URI = 21,
+ LTTNG_DISABLE_CONSUMER = 19,
+ LTTNG_ENABLE_CONSUMER = 20,
+ LTTNG_SET_CONSUMER_URI = 21,
/* 22 */
/* 23 */
- LTTNG_DATA_PENDING = 24,
- LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
- LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
- LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
- LTTNG_SNAPSHOT_RECORD = 28,
- LTTNG_CREATE_SESSION_SNAPSHOT = 29,
- LTTNG_CREATE_SESSION_LIVE = 30,
- LTTNG_SAVE_SESSION = 31,
- LTTNG_TRACK_PID = 32,
- LTTNG_UNTRACK_PID = 33,
- LTTNG_LIST_TRACKER_PIDS = 34,
- LTTNG_SET_SESSION_SHM_PATH = 40,
- LTTNG_REGENERATE_METADATA = 41,
- LTTNG_REGENERATE_STATEDUMP = 42,
- LTTNG_REGISTER_TRIGGER = 43,
- LTTNG_UNREGISTER_TRIGGER = 44,
- LTTNG_ROTATE_SESSION = 45,
- LTTNG_ROTATION_GET_INFO = 46,
- LTTNG_ROTATION_SET_SCHEDULE = 47,
- LTTNG_SESSION_LIST_ROTATION_SCHEDULES = 48,
+ LTTNG_DATA_PENDING = 24,
+ LTTNG_SNAPSHOT_ADD_OUTPUT = 25,
+ LTTNG_SNAPSHOT_DEL_OUTPUT = 26,
+ LTTNG_SNAPSHOT_LIST_OUTPUT = 27,
+ LTTNG_SNAPSHOT_RECORD = 28,
+ /* 29 */
+ /* 30 */
+ LTTNG_SAVE_SESSION = 31,
+ LTTNG_PROCESS_ATTR_TRACKER_ADD_INCLUDE_VALUE = 32,
+ LTTNG_PROCESS_ATTR_TRACKER_REMOVE_INCLUDE_VALUE = 33,
+ LTTNG_PROCESS_ATTR_TRACKER_GET_POLICY = 34,
+ LTTNG_PROCESS_ATTR_TRACKER_SET_POLICY = 35,
+ LTTNG_PROCESS_ATTR_TRACKER_GET_INCLUSION_SET = 36,
+ LTTNG_SET_SESSION_SHM_PATH = 40,
+ LTTNG_REGENERATE_METADATA = 41,
+ LTTNG_REGENERATE_STATEDUMP = 42,
+ LTTNG_REGISTER_TRIGGER = 43,
+ LTTNG_UNREGISTER_TRIGGER = 44,
+ LTTNG_ROTATE_SESSION = 45,
+ LTTNG_ROTATION_GET_INFO = 46,
+ LTTNG_ROTATION_SET_SCHEDULE = 47,
+ LTTNG_SESSION_LIST_ROTATION_SCHEDULES = 48,
+ LTTNG_CREATE_SESSION_EXT = 49,
+ LTTNG_CLEAR_SESSION = 50,
};
enum lttcomm_relayd_command {
RELAYD_STREAMS_SENT = 16,
/* Ask the relay to reset the metadata trace file (2.8+) */
RELAYD_RESET_METADATA = 17,
- /* Ask the relay to rotate a stream file (2.11+) */
- RELAYD_ROTATE_STREAM = 18,
- /* Rename a chunk after the rotation is completed (2.11+) */
- RELAYD_ROTATE_RENAME = 19,
- /* Check if a chunk has data pending (2.11+) */
- RELAYD_ROTATE_PENDING = 20,
- /* Create a folder on the relayd FS (2.11+) */
- RELAYD_MKDIR = 21,
+ /* Ask the relay to rotate a set of stream files (2.11+) */
+ RELAYD_ROTATE_STREAMS = 18,
+ /* Ask the relay to create a trace chunk (2.11+) */
+ RELAYD_CREATE_TRACE_CHUNK = 19,
+ /* Ask the relay to close a trace chunk (2.11+) */
+ RELAYD_CLOSE_TRACE_CHUNK = 20,
+ /* Ask the relay whether a trace chunk exists (2.11+) */
+ RELAYD_TRACE_CHUNK_EXISTS = 21,
+ /* Get the current configuration of a relayd peer (2.12+) */
+ RELAYD_GET_CONFIGURATION = 22,
+
+ /* Feature branch specific commands start at 10000. */
};
/*
*/
enum lttcomm_return_code {
LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */
- LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* Command socket ready */
+ /*
+ * Some code paths use -1 to express an error, others
+ * negate this consumer return code. Starting codes at
+ * 100 ensures there is no mix-up between this error value
+ * and legitimate status codes.
+ */
+ LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 100, /* Command socket ready */
LTTCOMM_CONSUMERD_SUCCESS_RECV_FD, /* Success on receiving fds */
LTTCOMM_CONSUMERD_ERROR_RECV_FD, /* Error on receiving fds */
LTTCOMM_CONSUMERD_ERROR_RECV_CMD, /* Error on receiving command */
LTTCOMM_CONSUMERD_CHAN_NOT_FOUND, /* Channel not found. */
LTTCOMM_CONSUMERD_ALREADY_SET, /* Resource already set. */
LTTCOMM_CONSUMERD_ROTATION_FAIL, /* Rotation has failed. */
- LTTCOMM_CONSUMERD_ROTATE_RENAME_FAILED, /* Rotation rename has failed. */
- LTTCOMM_CONSUMERD_ROTATION_PENDING_LOCAL_FAILED, /* Rotation pending relay failed. */
- LTTCOMM_CONSUMERD_ROTATION_PENDING_RELAY_FAILED, /* Rotation pending relay failed. */
- LTTCOMM_CONSUMERD_MKDIR_FAILED, /* mkdir has failed. */
+ LTTCOMM_CONSUMERD_SNAPSHOT_FAILED, /* snapshot has failed. */
+ LTTCOMM_CONSUMERD_CREATE_TRACE_CHUNK_FAILED,/* Trace chunk creation failed. */
+ LTTCOMM_CONSUMERD_CLOSE_TRACE_CHUNK_FAILED, /* Trace chunk creation failed. */
+ LTTCOMM_CONSUMERD_INVALID_PARAMETERS, /* Invalid parameters. */
+ LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_LOCAL, /* Trace chunk exists on consumer daemon. */
+ LTTCOMM_CONSUMERD_TRACE_CHUNK_EXISTS_REMOTE,/* Trace chunk exists on relay daemon. */
+ LTTCOMM_CONSUMERD_UNKNOWN_TRACE_CHUNK, /* Unknown trace chunk. */
+ LTTCOMM_CONSUMERD_RELAYD_CLEAR_DISALLOWED, /* Relayd does not accept clear command. */
+ LTTCOMM_CONSUMERD_UNKNOWN_ERROR, /* Unknown error. */
/* MUST be last element */
LTTCOMM_NR, /* Last element */
size_t len, int flags);
};
+struct process_attr_integral_value_comm {
+ union {
+ int64_t _signed;
+ uint64_t _unsigned;
+ } u;
+} LTTNG_PACKED;
+
/*
* Data structure received from lttng client to session daemon.
*/
char shm_path[PATH_MAX];
} LTTNG_PACKED set_shm_path;
struct {
- uint32_t pid;
- } LTTNG_PACKED pid_tracker;
+ /* enum lttng_process_attr */
+ int32_t process_attr;
+ /* enum lttng_process_attr_value_type */
+ int32_t value_type;
+
+ struct process_attr_integral_value_comm integral_value;
+ /*
+ * For user/group names, a variable length,
+ * zero-terminated, string of length 'name_len'
+ * (including the terminator) follows.
+ *
+ * integral_value should not be used in those cases.
+ */
+ uint32_t name_len;
+ } LTTNG_PACKED process_attr_tracker_add_remove_include_value;
+ struct {
+ /* enum lttng_process_attr */
+ int32_t process_attr;
+ } LTTNG_PACKED process_attr_tracker_get_inclusion_set;
+ struct {
+ /* enum lttng_process_attr */
+ int32_t process_attr;
+ } LTTNG_PACKED process_attr_tracker_get_tracking_policy;
+ struct {
+ /* enum lttng_process_attr */
+ int32_t process_attr;
+ /* enum lttng_tracking_policy */
+ int32_t tracking_policy;
+ } LTTNG_PACKED process_attr_tracker_set_tracking_policy;
struct {
uint32_t length;
} LTTNG_PACKED trigger;
uint8_t set;
uint64_t value;
} LTTNG_PACKED rotation_set_schedule;
+ struct {
+ /*
+ * Includes the null-terminator.
+ * Must be an absolute path.
+ *
+ * Size bounded by LTTNG_PATH_MAX.
+ */
+ uint16_t home_dir_size;
+ uint64_t session_descriptor_size;
+ /* An lttng_session_descriptor follows. */
+ } LTTNG_PACKED create_session;
} u;
} LTTNG_PACKED;
#define LTTNG_FILTER_MAX_LEN 65536
+#define LTTNG_SESSION_DESCRIPTOR_MAX_LEN 65536
/*
* Filter bytecode data. The reloc table is located at the end of the
uint32_t userspace_probe_location_len;
} LTTNG_PACKED;
+/*
+ * Command header of the reply to an LTTNG_DESTROY_SESSION command.
+ */
+struct lttcomm_session_destroy_command_header {
+ /* enum lttng_session */
+ int32_t rotation_state;
+};
+
+/*
+ * tracker command header.
+ */
+struct lttcomm_tracker_command_header {
+ uint32_t nb_tracker_id;
+} LTTNG_PACKED;
+
/*
* Data structure for the response from sessiond to the lttng client.
*/
uint32_t pid; /* pid_t */
uint32_t cmd_header_size;
uint32_t data_size;
+ uint32_t fd_count;
} LTTNG_PACKED;
struct lttcomm_lttng_output_id {
struct {
uint64_t channel_key;
uint64_t session_id;
+ /* ID of the session's current trace chunk. */
+ LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED chunk_id;
char pathname[PATH_MAX];
- uint32_t uid;
- uint32_t gid;
uint64_t relayd_id;
/* nb_init_streams is the number of streams open initially. */
uint32_t nb_init_streams;
uint32_t monitor;
/* timer to check the streams usage in live mode (usec). */
unsigned int live_timer_interval;
+ /* is part of a live session */
+ uint8_t is_live;
/* timer to sample a channel's positions (usec). */
unsigned int monitor_timer_interval;
} LTTNG_PACKED channel; /* Only used by Kernel. */
int32_t cpu; /* On which CPU this stream is assigned. */
/* Tells the consumer if the stream should be or not monitored. */
uint32_t no_monitor;
- /*
- * The archive id that was "current" at the time this
- * stream was created. This is used to determine
- * whether a rotation request was sent before or after
- * the creation of a stream.
- */
- uint64_t trace_archive_id;
} LTTNG_PACKED stream; /* Only used by Kernel. */
struct {
uint64_t net_index;
uint32_t switch_timer_interval; /* usec */
uint32_t read_timer_interval; /* usec */
unsigned int live_timer_interval; /* usec */
+ uint8_t is_live; /* is part of a live session */
uint32_t monitor_timer_interval; /* usec */
int32_t output; /* splice, mmap */
int32_t type; /* metadata or per_cpu */
uint64_t session_id; /* Tracing session id */
char pathname[PATH_MAX]; /* Channel file path. */
char name[LTTNG_SYMBOL_NAME_LEN]; /* Channel name. */
- uint32_t uid; /* User ID of the session */
- uint32_t gid; /* Group ID ot the session */
+ /* Credentials used to open the UST buffer shared mappings. */
+ struct {
+ uint32_t uid;
+ uint32_t gid;
+ } LTTNG_PACKED buffer_credentials;
uint64_t relayd_id; /* Relayd id if apply. */
uint64_t key; /* Unique channel key. */
- unsigned char uuid[UUID_LEN]; /* uuid for ust tracer. */
+ /* ID of the session's current trace chunk. */
+ LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED chunk_id;
+ unsigned char uuid[LTTNG_UUID_LEN]; /* uuid for ust tracer. */
uint32_t chan_id; /* Channel ID on the tracer side. */
uint64_t tracefile_size; /* bytes */
uint32_t tracefile_count; /* number of tracefiles */
*/
uint32_t ust_app_uid;
int64_t blocking_timeout;
- /*
- * The archive id that was "current" at the time this
- * channel was created. This is used to determine
- * whether a rotation request was sent before or after
- * the creation of a channel.
- */
- uint64_t trace_archive_id;
char root_shm_path[PATH_MAX];
char shm_path[PATH_MAX];
} LTTNG_PACKED ask_channel;
uint64_t relayd_id; /* Relayd id if apply. */
uint64_t key;
uint64_t nb_packets_per_stream;
- /*
- * The session's current trace archive id is propagated
- * since a snapshot triggers the creation of an
- * ephemeral metadata stream.
- */
- uint64_t trace_archive_id;
} LTTNG_PACKED snapshot_channel;
struct {
uint64_t channel_key;
uint64_t session_id;
} LTTNG_PACKED regenerate_metadata;
struct {
- char pathname[PATH_MAX];
uint32_t metadata; /* This is a metadata channel. */
uint64_t relayd_id; /* Relayd id if apply. */
uint64_t key;
- uint64_t new_chunk_id;
} LTTNG_PACKED rotate_channel;
- struct {
- char old_path[LTTNG_PATH_MAX];
- char new_path[LTTNG_PATH_MAX];
- uint64_t relayd_id; /* Relayd id if apply. */
- uint64_t session_id;
- uint32_t uid;
- uint32_t gid;
- } LTTNG_PACKED rotate_rename;
struct {
uint64_t session_id;
uint64_t chunk_id;
uint64_t chunk_id;
} LTTNG_PACKED check_rotation_pending_relay;
struct {
- char path[LTTNG_PATH_MAX];
- uint64_t relayd_id; /* Relayd id if apply. */
+ /*
+ * Relayd id, if applicable (remote).
+ *
+ * A directory file descriptor referring to the chunk's
+ * output folder is transmitted if the chunk is local
+ * (relayd_id unset).
+ *
+ * `override_name` is left NULL (all-zeroes) if the
+ * chunk's name is not overridden.
+ */
+ LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id;
+ char override_name[LTTNG_NAME_MAX];
+ uint64_t session_id;
+ uint64_t chunk_id;
+ uint64_t creation_timestamp;
+ LTTNG_OPTIONAL_COMM(struct {
+ uint32_t uid;
+ uint32_t gid;
+ } LTTNG_PACKED ) LTTNG_PACKED credentials;
+ } LTTNG_PACKED create_trace_chunk;
+ struct {
+ LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id;
uint64_t session_id;
- uint32_t uid;
- uint32_t gid;
- } LTTNG_PACKED mkdir;
+ uint64_t chunk_id;
+ uint64_t close_timestamp;
+ /* enum lttng_trace_chunk_command_type */
+ LTTNG_OPTIONAL_COMM(uint32_t) LTTNG_PACKED close_command;
+ } LTTNG_PACKED close_trace_chunk;
+ struct {
+ LTTNG_OPTIONAL_COMM(uint64_t) LTTNG_PACKED relayd_id;
+ uint64_t session_id;
+ uint64_t chunk_id;
+ } LTTNG_PACKED trace_chunk_exists;
+ struct {
+ lttng_uuid sessiond_uuid;
+ } LTTNG_PACKED init;
+ struct {
+ uint64_t key;
+ } LTTNG_PACKED clear_channel;
+ struct {
+ uint64_t key;
+ } LTTNG_PACKED open_channel_packets;
} u;
} LTTNG_PACKED;
unsigned int stream_count;
} LTTNG_PACKED;
+struct lttcomm_consumer_close_trace_chunk_reply {
+ enum lttcomm_return_code ret_code;
+ uint32_t path_length;
+ char path[];
+};
+
#ifdef HAVE_LIBLTTNG_UST_CTL
#include <lttng/ust-abi.h>
projects / lttng-tools.git / blobdiff