X-Git-Url: https://git.lttng.org/?p=lttng-tools.git;a=blobdiff_plain;f=src%2Fcommon%2Fsessiond-comm%2Fsessiond-comm.h;h=f6179f31dc5132838516b5c75021d32eeecd6ada;hp=472ca35d4446ead2215d7931e362dbf0da44e960;hb=e9404c27e7cc9d841785e6c4292c1add19fbc1cc;hpb=531d29f9e514ad5a4880600d5c7e373f2f254ead diff --git a/src/common/sessiond-comm/sessiond-comm.h b/src/common/sessiond-comm/sessiond-comm.h index 472ca35d4..f6179f31d 100644 --- a/src/common/sessiond-comm/sessiond-comm.h +++ b/src/common/sessiond-comm/sessiond-comm.h @@ -3,18 +3,18 @@ * Julien Desfossez * Mathieu Desnoyers * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the Free - * Software Foundation; only version 2 of the License. - * + * 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. + * * 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 + * 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., 59 Temple - * Place - Suite 330, Boston, MA 02111-1307, USA. + * + * 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. */ /* @@ -25,10 +25,24 @@ #ifndef _LTTNG_SESSIOND_COMM_H #define _LTTNG_SESSIOND_COMM_H -#define _GNU_SOURCE #include #include -#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#include "inet.h" +#include "inet6.h" +#include /* Queue size of listen(2) */ #define LTTNG_SESSIOND_COMM_MAX_LISTEN 64 @@ -39,173 +53,350 @@ /* * Get the error code index from 0 since LTTCOMM_OK start at 1000 */ -#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_OK) +#define LTTCOMM_ERR_INDEX(code) (code - LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) enum lttcomm_sessiond_command { /* Tracer command */ - LTTNG_ADD_CONTEXT, - LTTNG_CALIBRATE, - LTTNG_DISABLE_CHANNEL, - LTTNG_DISABLE_EVENT, - LTTNG_DISABLE_ALL_EVENT, - LTTNG_ENABLE_CHANNEL, - LTTNG_ENABLE_EVENT, - LTTNG_ENABLE_ALL_EVENT, + 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, + /* 7 */ /* Session daemon command */ - LTTNG_CREATE_SESSION, - LTTNG_DESTROY_SESSION, - LTTNG_LIST_CHANNELS, - LTTNG_LIST_DOMAINS, - LTTNG_LIST_EVENTS, - LTTNG_LIST_SESSIONS, - LTTNG_LIST_TRACEPOINTS, - LTTNG_REGISTER_CONSUMER, - LTTNG_START_TRACE, - LTTNG_STOP_TRACE, + 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, + + /* Consumer */ + 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, +}; + +enum lttcomm_relayd_command { + RELAYD_ADD_STREAM = 1, + RELAYD_CREATE_SESSION = 2, + RELAYD_START_DATA = 3, + RELAYD_UPDATE_SYNC_INFO = 4, + RELAYD_VERSION = 5, + RELAYD_SEND_METADATA = 6, + RELAYD_CLOSE_STREAM = 7, + RELAYD_DATA_PENDING = 8, + RELAYD_QUIESCENT_CONTROL = 9, + RELAYD_BEGIN_DATA_PENDING = 10, + RELAYD_END_DATA_PENDING = 11, + RELAYD_ADD_INDEX = 12, + RELAYD_SEND_INDEX = 13, + RELAYD_CLOSE_INDEX = 14, + /* Live-reading commands (2.4+). */ + RELAYD_LIST_SESSIONS = 15, + /* All streams of the channel have been sent to the relayd (2.4+). */ + RELAYD_STREAMS_SENT = 16, + /* Ask the relay to reset the metadata trace file (2.8+) */ + RELAYD_RESET_METADATA = 17, }; /* * lttcomm error code. */ enum lttcomm_return_code { - LTTCOMM_OK = 1000, /* Ok */ - LTTCOMM_ERR, /* Unknown Error */ - LTTCOMM_UND, /* Undefine command */ - LTTCOMM_NOT_IMPLEMENTED, /* Command not implemented */ - LTTCOMM_UNKNOWN_DOMAIN, /* Tracing domain not known */ - LTTCOMM_ALLOC_FAIL, /* Trace allocation fail */ - LTTCOMM_NO_SESSION, /* No session found */ - LTTCOMM_CREATE_DIR_FAIL, /* Create directory fail */ - LTTCOMM_SESSION_FAIL, /* Create session fail */ - LTTCOMM_START_FAIL, /* Start tracing fail */ - LTTCOMM_STOP_FAIL, /* Stop tracing fail */ - LTTCOMM_LIST_FAIL, /* Listing apps fail */ - LTTCOMM_NO_APPS, /* No traceable application */ - LTTCOMM_SESS_NOT_FOUND, /* Session name not found */ - LTTCOMM_NO_TRACE, /* No trace exist */ - LTTCOMM_FATAL, /* Session daemon had a fatal error */ - LTTCOMM_NO_TRACEABLE, /* Error for non traceable app */ - LTTCOMM_SELECT_SESS, /* Must select a session */ - LTTCOMM_EXIST_SESS, /* Session name already exist */ - LTTCOMM_NO_EVENT, /* No event found */ - LTTCOMM_CONNECT_FAIL, /* Unable to connect to unix socket */ - LTTCOMM_APP_NOT_FOUND, /* App not found in traceable app list */ - LTTCOMM_EPERM, /* Permission denied */ - LTTCOMM_KERN_NA, /* Kernel tracer unavalable */ - LTTCOMM_KERN_VERSION, /* Kernel tracer version is not compatible */ - LTTCOMM_KERN_EVENT_EXIST, /* Kernel event already exists */ - LTTCOMM_KERN_SESS_FAIL, /* Kernel create session failed */ - LTTCOMM_KERN_CHAN_FAIL, /* Kernel create channel failed */ - LTTCOMM_KERN_CHAN_NOT_FOUND, /* Kernel channel not found */ - LTTCOMM_KERN_CHAN_DISABLE_FAIL, /* Kernel disable channel failed */ - LTTCOMM_KERN_CHAN_ENABLE_FAIL, /* Kernel enable channel failed */ - LTTCOMM_KERN_CONTEXT_FAIL, /* Kernel add context failed */ - LTTCOMM_KERN_ENABLE_FAIL, /* Kernel enable event failed */ - LTTCOMM_KERN_DISABLE_FAIL, /* Kernel disable event failed */ - LTTCOMM_KERN_META_FAIL, /* Kernel open metadata failed */ - LTTCOMM_KERN_START_FAIL, /* Kernel start trace failed */ - LTTCOMM_KERN_STOP_FAIL, /* Kernel stop trace failed */ - LTTCOMM_KERN_CONSUMER_FAIL, /* Kernel consumer start failed */ - LTTCOMM_KERN_STREAM_FAIL, /* Kernel create stream failed */ - LTTCOMM_KERN_DIR_FAIL, /* Kernel trace directory creation failed */ - LTTCOMM_KERN_DIR_EXIST, /* Kernel trace directory exist */ - LTTCOMM_KERN_NO_SESSION, /* No kernel session found */ - LTTCOMM_KERN_LIST_FAIL, /* Kernel listing events failed */ - LTTCOMM_UST_CALIBRATE_FAIL, /* UST calibration failed */ - LTTCOMM_UST_VERSION, /* UST tracer version is not compatible */ - LTTCOMM_UST_SESS_FAIL, /* UST create session failed */ - LTTCOMM_UST_CHAN_EXIST, /* UST channel already exist */ - LTTCOMM_UST_CHAN_FAIL, /* UST create channel failed */ - LTTCOMM_UST_CHAN_NOT_FOUND, /* UST channel not found */ - LTTCOMM_UST_CHAN_DISABLE_FAIL, /* UST disable channel failed */ - LTTCOMM_UST_CHAN_ENABLE_FAIL, /* UST enable channel failed */ - LTTCOMM_UST_CONTEXT_FAIL, /* UST add context failed */ - LTTCOMM_UST_ENABLE_FAIL, /* UST enable event failed */ - LTTCOMM_UST_DISABLE_FAIL, /* UST disable event failed */ - LTTCOMM_UST_META_FAIL, /* UST open metadata failed */ - LTTCOMM_UST_START_FAIL, /* UST start trace failed */ - LTTCOMM_UST_STOP_FAIL, /* UST stop trace failed */ - LTTCOMM_UST_CONSUMER64_FAIL, /* 64-bit UST consumer start failed */ - LTTCOMM_UST_CONSUMER32_FAIL, /* 32-bit UST consumer start failed */ - LTTCOMM_UST_STREAM_FAIL, /* UST create stream failed */ - LTTCOMM_UST_DIR_FAIL, /* UST trace directory creation failed */ - LTTCOMM_UST_DIR_EXIST, /* UST trace directory exist */ - LTTCOMM_UST_NO_SESSION, /* No UST session found */ - LTTCOMM_UST_LIST_FAIL, /* UST listing events failed */ - LTTCOMM_UST_EVENT_EXIST, /* UST event exist */ - LTTCOMM_UST_EVENT_NOT_FOUND, /* UST event not found */ - LTTCOMM_UST_CONTEXT_EXIST, /* UST context exist */ - LTTCOMM_UST_CONTEXT_INVAL, /* UST context invalid */ - - CONSUMERD_COMMAND_SOCK_READY, /* when consumerd command socket ready */ - CONSUMERD_SUCCESS_RECV_FD, /* success on receiving fds */ - CONSUMERD_ERROR_RECV_FD, /* error on receiving fds */ - CONSUMERD_ERROR_RECV_CMD, /* error on receiving command */ - CONSUMERD_POLL_ERROR, /* Error in polling thread in kconsumerd */ - CONSUMERD_POLL_NVAL, /* Poll on closed fd */ - CONSUMERD_POLL_HUP, /* All fds have hungup */ - CONSUMERD_EXIT_SUCCESS, /* kconsumerd exiting normally */ - CONSUMERD_EXIT_FAILURE, /* kconsumerd exiting on error */ - CONSUMERD_OUTFD_ERROR, /* error opening the tracefile */ - CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */ - CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */ - CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */ - CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */ - LTTCOMM_NEED_ROOT_SESSIOND, /* root sessiond is needed */ + LTTCOMM_CONSUMERD_SUCCESS = 0, /* Everything went fine. */ + LTTCOMM_CONSUMERD_COMMAND_SOCK_READY = 1, /* 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_POLL_ERROR, /* Error in polling thread */ + LTTCOMM_CONSUMERD_POLL_NVAL, /* Poll on closed fd */ + LTTCOMM_CONSUMERD_POLL_HUP, /* All fds have hungup */ + LTTCOMM_CONSUMERD_EXIT_SUCCESS, /* Consumerd exiting normally */ + LTTCOMM_CONSUMERD_EXIT_FAILURE, /* Consumerd exiting on error */ + LTTCOMM_CONSUMERD_OUTFD_ERROR, /* Error opening the tracefile */ + LTTCOMM_CONSUMERD_SPLICE_EBADF, /* EBADF from splice(2) */ + LTTCOMM_CONSUMERD_SPLICE_EINVAL, /* EINVAL from splice(2) */ + LTTCOMM_CONSUMERD_SPLICE_ENOMEM, /* ENOMEM from splice(2) */ + LTTCOMM_CONSUMERD_SPLICE_ESPIPE, /* ESPIPE from splice(2) */ + LTTCOMM_CONSUMERD_ENOMEM, /* Consumer is out of memory */ + LTTCOMM_CONSUMERD_ERROR_METADATA, /* Error with metadata. */ + LTTCOMM_CONSUMERD_FATAL, /* Fatal error. */ + LTTCOMM_CONSUMERD_RELAYD_FAIL, /* Error on remote relayd */ + LTTCOMM_CONSUMERD_CHANNEL_FAIL, /* Channel creation failed. */ + LTTCOMM_CONSUMERD_CHAN_NOT_FOUND, /* Channel not found. */ + LTTCOMM_CONSUMERD_ALREADY_SET, /* Resource already set. */ + /* MUST be last element */ LTTCOMM_NR, /* Last element */ }; +/* lttng socket protocol. */ +enum lttcomm_sock_proto { + LTTCOMM_SOCK_UDP, + LTTCOMM_SOCK_TCP, +}; + +/* + * Index in the net_families array below. Please keep in sync! + */ +enum lttcomm_sock_domain { + LTTCOMM_INET = 0, + LTTCOMM_INET6 = 1, +}; + +enum lttcomm_metadata_command { + LTTCOMM_METADATA_REQUEST = 1, +}; + +/* + * Commands sent from the consumerd to the sessiond to request if new metadata + * is available. This message is used to find the per UID _or_ per PID registry + * for the channel key. For per UID lookup, the triplet + * bits_per_long/uid/session_id is used. On lookup failure, we search for the + * per PID registry indexed by session id ignoring the other values. + */ +struct lttcomm_metadata_request_msg { + uint64_t session_id; /* Tracing session id */ + uint64_t session_id_per_pid; /* Tracing session id for per-pid */ + uint32_t bits_per_long; /* Consumer ABI */ + uint32_t uid; + uint64_t key; /* Metadata channel key. */ +} LTTNG_PACKED; + +struct lttcomm_sockaddr { + enum lttcomm_sock_domain type; + union { + struct sockaddr_in sin; + struct sockaddr_in6 sin6; + } addr; +} LTTNG_PACKED; + +struct lttcomm_sock { + int32_t fd; + enum lttcomm_sock_proto proto; + struct lttcomm_sockaddr sockaddr; + const struct lttcomm_proto_ops *ops; +} LTTNG_PACKED; + +/* + * Relayd sock. Adds the protocol version to use for the communications with + * the relayd. + */ +struct lttcomm_relayd_sock { + struct lttcomm_sock sock; + uint32_t major; + uint32_t minor; +} LTTNG_PACKED; + +struct lttcomm_net_family { + int family; + int (*create) (struct lttcomm_sock *sock, int type, int proto); +}; + +struct lttcomm_proto_ops { + int (*bind) (struct lttcomm_sock *sock); + int (*close) (struct lttcomm_sock *sock); + int (*connect) (struct lttcomm_sock *sock); + struct lttcomm_sock *(*accept) (struct lttcomm_sock *sock); + int (*listen) (struct lttcomm_sock *sock, int backlog); + ssize_t (*recvmsg) (struct lttcomm_sock *sock, void *buf, size_t len, + int flags); + ssize_t (*sendmsg) (struct lttcomm_sock *sock, const void *buf, + size_t len, int flags); +}; + /* * Data structure received from lttng client to session daemon. */ struct lttcomm_session_msg { - uint32_t cmd_type; /* enum lttcomm_sessiond_command */ + uint32_t cmd_type; /* enum lttcomm_sessiond_command */ struct lttng_session session; struct lttng_domain domain; union { - struct { - char channel_name[NAME_MAX]; - char name[NAME_MAX]; - } disable; /* Event data */ struct { - char channel_name[NAME_MAX]; - struct lttng_event event; - } enable; + char channel_name[LTTNG_SYMBOL_NAME_LEN]; + struct lttng_event event LTTNG_PACKED; + /* Length of following filter expression. */ + uint32_t expression_len; + /* Length of following bytecode for filter. */ + uint32_t bytecode_len; + /* exclusion data */ + uint32_t exclusion_count; + /* + * After this structure, the following variable-length + * items are transmitted: + * - char exclusion_names[LTTNG_SYMBOL_NAME_LEN][exclusion_count] + * - unsigned char filter_expression[expression_len] + * - unsigned char filter_bytecode[bytecode_len] + */ + } LTTNG_PACKED enable; + struct { + char channel_name[LTTNG_SYMBOL_NAME_LEN]; + struct lttng_event event LTTNG_PACKED; + /* Length of following filter expression. */ + uint32_t expression_len; + /* Length of following bytecode for filter. */ + uint32_t bytecode_len; + /* + * After this structure, the following variable-length + * items are transmitted: + * - unsigned char filter_expression[expression_len] + * - unsigned char filter_bytecode[bytecode_len] + */ + } LTTNG_PACKED disable; /* Create channel */ struct { - struct lttng_channel chan; - } channel; + struct lttng_channel chan LTTNG_PACKED; + /* struct lttng_channel_extended is already packed. */ + struct lttng_channel_extended extended; + } LTTNG_PACKED channel; /* Context */ struct { - char channel_name[NAME_MAX]; - char event_name[NAME_MAX]; - struct lttng_event_context ctx; - } context; + char channel_name[LTTNG_SYMBOL_NAME_LEN]; + struct lttng_event_context ctx LTTNG_PACKED; + uint32_t provider_name_len; + uint32_t context_name_len; + } LTTNG_PACKED context; /* Use by register_consumer */ struct { char path[PATH_MAX]; - } reg; + } LTTNG_PACKED reg; /* List */ struct { - char channel_name[NAME_MAX]; - } list; + char channel_name[LTTNG_SYMBOL_NAME_LEN]; + } LTTNG_PACKED list; struct lttng_calibrate calibrate; + /* Used by the set_consumer_url and used by create_session also call */ + struct { + /* Number of lttng_uri following */ + uint32_t size; + } LTTNG_PACKED uri; + struct { + struct lttng_snapshot_output output LTTNG_PACKED; + } LTTNG_PACKED snapshot_output; + struct { + uint32_t wait; + struct lttng_snapshot_output output LTTNG_PACKED; + } LTTNG_PACKED snapshot_record; + struct { + uint32_t nb_uri; + unsigned int timer_interval; /* usec */ + } LTTNG_PACKED session_live; + struct { + struct lttng_save_session_attr attr; /* struct already packed */ + } LTTNG_PACKED save_session; + struct { + char shm_path[PATH_MAX]; + } LTTNG_PACKED set_shm_path; + struct { + uint32_t pid; + } LTTNG_PACKED pid_tracker; + struct { + uint32_t length; + } LTTNG_PACKED trigger; } u; -}; +} LTTNG_PACKED; + +#define LTTNG_FILTER_MAX_LEN 65536 + +/* + * Filter bytecode data. The reloc table is located at the end of the + * bytecode. It is made of tuples: (uint16_t, var. len. string). It + * starts at reloc_table_offset. + */ +#define LTTNG_FILTER_PADDING 32 +struct lttng_filter_bytecode { + uint32_t len; /* len of data */ + uint32_t reloc_table_offset; + uint64_t seqnum; + char padding[LTTNG_FILTER_PADDING]; + char data[0]; +} LTTNG_PACKED; + +/* + * Event exclusion data. At the end of the structure, there will actually + * by zero or more names, where the actual number of names is given by + * the 'count' item of the structure. + */ +#define LTTNG_EVENT_EXCLUSION_PADDING 32 +struct lttng_event_exclusion { + uint32_t count; + char padding[LTTNG_EVENT_EXCLUSION_PADDING]; + char names[0][LTTNG_SYMBOL_NAME_LEN]; +} LTTNG_PACKED; + +#define LTTNG_EVENT_EXCLUSION_NAME_AT(_exclusion, _i) \ + (&(_exclusion)->names[_i][0]) + +/* + * Event command header. + */ +struct lttcomm_event_command_header { + /* Number of events */ + uint32_t nb_events; +} LTTNG_PACKED; + +/* + * Event extended info header. This is the structure preceding each + * extended info data. + */ +struct lttcomm_event_extended_header { + /* + * Size of filter string immediately following this header. + * This size includes the terminal null character. + */ + uint32_t filter_len; + + /* + * Number of exclusion names, immediately following the filter + * string. Each exclusion name has a fixed length of + * LTTNG_SYMBOL_NAME_LEN bytes, including the terminal null + * character. + */ + uint32_t nb_exclusions; +} LTTNG_PACKED; /* * Data structure for the response from sessiond to the lttng client. */ struct lttcomm_lttng_msg { - uint32_t cmd_type; /* enum lttcomm_sessiond_command */ - uint32_t ret_code; /* enum lttcomm_return_code */ - uint32_t pid; /* pid_t */ + uint32_t cmd_type; /* enum lttcomm_sessiond_command */ + uint32_t ret_code; /* enum lttcomm_return_code */ + uint32_t pid; /* pid_t */ + uint32_t cmd_header_size; uint32_t data_size; - /* Contains: trace_name + data */ - char payload[]; -}; +} LTTNG_PACKED; + +struct lttcomm_lttng_output_id { + uint32_t id; +} LTTNG_PACKED; /* * lttcomm_consumer_msg is the message sent from sessiond to consumerd @@ -216,24 +407,160 @@ struct lttcomm_consumer_msg { uint32_t cmd_type; /* enum consumerd_command */ union { struct { - int channel_key; - uint64_t max_sb_size; /* the subbuffer size for this channel */ - /* shm_fd and wait_fd are sent as ancillary data */ - uint64_t mmap_len; - } channel; - struct { - int channel_key; - int stream_key; - /* shm_fd and wait_fd are sent as ancillary data */ - uint32_t state; /* enum lttcomm_consumer_fd_state */ - enum lttng_event_output output; /* use splice or mmap to consume this fd */ - uint64_t mmap_len; - uid_t uid; /* User ID owning the session */ - gid_t gid; /* Group ID owning the session */ - char path_name[PATH_MAX]; - } stream; + uint64_t channel_key; + uint64_t session_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; + char name[LTTNG_SYMBOL_NAME_LEN]; + /* Use splice or mmap to consume this fd */ + enum lttng_event_output output; + int type; /* Per cpu or metadata. */ + uint64_t tracefile_size; /* bytes */ + uint32_t tracefile_count; /* number of tracefiles */ + /* If the channel's streams have to be monitored or not. */ + uint32_t monitor; + /* timer to check the streams usage in live mode (usec). */ + unsigned int live_timer_interval; + /* timer to sample a channel's positions (usec). */ + unsigned int monitor_timer_interval; + } LTTNG_PACKED channel; /* Only used by Kernel. */ + struct { + uint64_t stream_key; + uint64_t channel_key; + 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; + } LTTNG_PACKED stream; /* Only used by Kernel. */ + struct { + uint64_t net_index; + enum lttng_stream_type type; + /* Open socket to the relayd */ + struct lttcomm_relayd_sock sock; + /* Tracing session id associated to the relayd. */ + uint64_t session_id; + /* Relayd session id, only used with control socket. */ + uint64_t relayd_session_id; + } LTTNG_PACKED relayd_sock; + struct { + uint64_t net_seq_idx; + } LTTNG_PACKED destroy_relayd; + struct { + uint64_t session_id; + } LTTNG_PACKED data_pending; + struct { + uint64_t subbuf_size; /* bytes */ + uint64_t num_subbuf; /* power of 2 */ + int32_t overwrite; /* 1: overwrite, 0: discard */ + uint32_t switch_timer_interval; /* usec */ + uint32_t read_timer_interval; /* usec */ + unsigned int live_timer_interval; /* usec */ + 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 */ + uint64_t relayd_id; /* Relayd id if apply. */ + uint64_t key; /* Unique channel key. */ + unsigned char uuid[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 */ + uint64_t session_id_per_pid; /* Per-pid session ID. */ + /* Tells the consumer if the stream should be or not monitored. */ + uint32_t monitor; + /* + * For UST per UID buffers, this is the application UID of the + * channel. This can be different from the user UID requesting the + * channel creation and used for the rights on the stream file + * because the application can be in the tracing for instance. + */ + uint32_t ust_app_uid; + char root_shm_path[PATH_MAX]; + char shm_path[PATH_MAX]; + } LTTNG_PACKED ask_channel; + struct { + uint64_t key; + } LTTNG_PACKED get_channel; + struct { + uint64_t key; + } LTTNG_PACKED destroy_channel; + struct { + uint64_t key; /* Metadata channel key. */ + uint64_t target_offset; /* Offset in the consumer */ + uint64_t len; /* Length of metadata to be received. */ + uint64_t version; /* Version of the metadata. */ + } LTTNG_PACKED push_metadata; + struct { + uint64_t key; /* Metadata channel key. */ + } LTTNG_PACKED close_metadata; + struct { + uint64_t key; /* Metadata channel key. */ + } LTTNG_PACKED setup_metadata; + struct { + uint64_t key; /* Channel key. */ + } LTTNG_PACKED flush_channel; + struct { + uint64_t key; /* Channel key. */ + } LTTNG_PACKED clear_quiescent_channel; + struct { + char pathname[PATH_MAX]; + /* Indicate if the snapshot goes on the relayd or locally. */ + uint32_t use_relayd; + uint32_t metadata; /* This a metadata snapshot. */ + uint64_t relayd_id; /* Relayd id if apply. */ + uint64_t key; + uint64_t nb_packets_per_stream; + } LTTNG_PACKED snapshot_channel; + struct { + uint64_t channel_key; + uint64_t net_seq_idx; + } LTTNG_PACKED sent_streams; + struct { + uint64_t session_id; + uint64_t channel_key; + } LTTNG_PACKED discarded_events; + struct { + uint64_t session_id; + uint64_t channel_key; + } LTTNG_PACKED lost_packets; + struct { + uint64_t session_id; + } LTTNG_PACKED regenerate_metadata; } u; -}; +} LTTNG_PACKED; + +/* + * Channel monitoring message returned to the session daemon on every + * monitor timer expiration. + */ +struct lttcomm_consumer_channel_monitor_msg { + /* Key of the sampled channel. */ + uint64_t key; + /* + * Lowest and highest usage (bytes) at the moment the sample was taken. + */ + uint64_t lowest, highest; +} LTTNG_PACKED; + +/* + * Status message returned to the sessiond after a received command. + */ +struct lttcomm_consumer_status_msg { + enum lttcomm_return_code ret_code; +} LTTNG_PACKED; + +struct lttcomm_consumer_status_channel { + enum lttcomm_return_code ret_code; + uint64_t key; + unsigned int stream_count; +} LTTNG_PACKED; #ifdef HAVE_LIBLTTNG_UST_CTL @@ -252,7 +579,7 @@ struct lttcomm_ust_msg { struct lttng_ust_context context; struct lttng_ust_tracer_version version; } u; -}; +} LTTNG_PACKED; /* * Data structure for the response from UST to the session daemon. @@ -266,35 +593,40 @@ struct lttcomm_ust_reply { union { struct { uint64_t memory_map_size; - } channel; + } LTTNG_PACKED channel; struct { uint64_t memory_map_size; - } stream; + } LTTNG_PACKED stream; struct lttng_ust_tracer_version version; } u; -}; +} LTTNG_PACKED; #endif /* HAVE_LIBLTTNG_UST_CTL */ -extern int lttcomm_create_unix_sock(const char *pathname); -extern int lttcomm_connect_unix_sock(const char *pathname); -extern int lttcomm_accept_unix_sock(int sock); -extern int lttcomm_listen_unix_sock(int sock); -extern int lttcomm_close_unix_sock(int sock); +extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code); -/* Send a message accompanied by fd(s) over a unix socket. */ -extern ssize_t lttcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd); -/* Recv a message accompanied by fd(s) from a unix socket */ -extern ssize_t lttcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd); +extern int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr, + const char *ip, unsigned int port); +extern int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr, + const char *ip, unsigned int port); -extern ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len); -extern ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len); +extern struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto); +extern int lttcomm_create_sock(struct lttcomm_sock *sock); +extern struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri); +extern void lttcomm_destroy_sock(struct lttcomm_sock *sock); +extern struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src); +extern void lttcomm_copy_sock(struct lttcomm_sock *dst, + struct lttcomm_sock *src); -extern ssize_t lttcomm_send_creds_unix_sock(int sock, void *buf, size_t len); -extern ssize_t lttcomm_recv_creds_unix_sock(int sock, void *buf, size_t len, - struct ucred *creds); +/* Relayd socket object. */ +extern struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock( + struct lttng_uri *uri, uint32_t major, uint32_t minor); -extern const char *lttcomm_get_readable_code(enum lttcomm_return_code code); -extern int lttcomm_setsockopt_creds_unix_sock(int sock); +extern int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec); +extern int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec); + +extern void lttcomm_init(void); +/* Get network timeout, in milliseconds */ +extern unsigned long lttcomm_get_network_timeout(void); #endif /* _LTTNG_SESSIOND_COMM_H */