+++ /dev/null
-/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
- *
- * 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 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.
- */
-
-#ifndef _LTT_UST_APP_H
-#define _LTT_UST_APP_H
-
-#include <stdint.h>
-
-#include <common/compat/uuid.h>
-
-#include "agent.h"
-#include "trace-ust.h"
-#include "ust-registry.h"
-
-#define UST_APP_EVENT_LIST_SIZE 32
-
-/* Process name (short). */
-#define UST_APP_PROCNAME_LEN 16
-
-struct lttng_filter_bytecode;
-struct lttng_ust_filter_bytecode;
-
-extern int ust_consumerd64_fd, ust_consumerd32_fd;
-
-/*
- * Object used to close the notify socket in a call_rcu(). Since the
- * application might not be found, we need an independant object containing the
- * notify socket fd.
- */
-struct ust_app_notify_sock_obj {
- int fd;
- struct rcu_head head;
-};
-
-struct ust_app_ht_key {
- const char *name;
- const struct lttng_ust_filter_bytecode *filter;
- enum lttng_ust_loglevel_type loglevel;
- const struct lttng_ust_event_exclusion *exclusion;
-};
-
-/*
- * Application registration data structure.
- */
-struct ust_register_msg {
- enum ustctl_socket_type type;
- uint32_t major;
- uint32_t minor;
- uint32_t abi_major;
- uint32_t abi_minor;
- pid_t pid;
- pid_t ppid;
- uid_t uid;
- gid_t gid;
- uint32_t bits_per_long;
- uint32_t uint8_t_alignment;
- uint32_t uint16_t_alignment;
- uint32_t uint32_t_alignment;
- uint32_t uint64_t_alignment;
- uint32_t long_alignment;
- int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
- char name[LTTNG_UST_ABI_PROCNAME_LEN];
-};
-
-/*
- * Global applications HT used by the session daemon. This table is indexed by
- * PID using the pid_n node and pid value of an ust_app.
- */
-struct lttng_ht *ust_app_ht;
-
-/*
- * Global applications HT used by the session daemon. This table is indexed by
- * socket using the sock_n node and sock value of an ust_app.
- */
-struct lttng_ht *ust_app_ht_by_sock;
-
-/*
- * Global applications HT used by the session daemon. This table is indexed by
- * socket using the notify_sock_n node and notify_sock value of an ust_app.
- */
-struct lttng_ht *ust_app_ht_by_notify_sock;
-
-/* Stream list containing ust_app_stream. */
-struct ust_app_stream_list {
- unsigned int count;
- struct cds_list_head head;
-};
-
-struct ust_app_ctx {
- int handle;
- struct lttng_ust_context ctx;
- struct lttng_ust_object_data *obj;
- struct lttng_ht_node_ulong node;
- struct cds_list_head list;
-};
-
-struct ust_app_event {
- int enabled;
- int handle;
- struct lttng_ust_object_data *obj;
- struct lttng_ust_event attr;
- char name[LTTNG_UST_SYM_NAME_LEN];
- struct lttng_ht_node_str node;
- struct lttng_ust_filter_bytecode *filter;
- struct lttng_ust_event_exclusion *exclusion;
-};
-
-struct ust_app_stream {
- int handle;
- char pathname[PATH_MAX];
- /* Format is %s_%d respectively channel name and CPU number. */
- char name[DEFAULT_STREAM_NAME_LEN];
- struct lttng_ust_object_data *obj;
- /* Using a list of streams to keep order. */
- struct cds_list_head list;
-};
-
-struct ust_app_channel {
- int enabled;
- int handle;
- /* Channel and streams were sent to the UST tracer. */
- int is_sent;
- /* Unique key used to identify the channel on the consumer side. */
- uint64_t key;
- /* Id of the tracing channel set on creation. */
- uint64_t tracing_channel_id;
- /* Number of stream that this channel is expected to receive. */
- unsigned int expected_stream_count;
- char name[LTTNG_UST_SYM_NAME_LEN];
- struct lttng_ust_object_data *obj;
- struct ustctl_consumer_channel_attr attr;
- struct ust_app_stream_list streams;
- /* Session pointer that owns this object. */
- struct ust_app_session *session;
- /*
- * Contexts are kept in a hash table for fast lookup and in an ordered list
- * so we are able to enable them on the tracer side in the same order the
- * user added them.
- */
- struct lttng_ht *ctx;
- struct cds_list_head ctx_list;
-
- struct lttng_ht *events;
- uint64_t tracefile_size;
- uint64_t tracefile_count;
- /*
- * Node indexed by channel name in the channels' hash table of a session.
- */
- struct lttng_ht_node_str node;
- /*
- * Node indexed by UST channel object descriptor (handle). Stored in the
- * ust_objd hash table in the ust_app object.
- */
- struct lttng_ht_node_ulong ust_objd_node;
- /* For delayed reclaim */
- struct rcu_head rcu_head;
-};
-
-struct ust_app_session {
- /*
- * Lock protecting this session's ust app interaction. Held
- * across command send/recv to/from app. Never nests within the
- * session registry lock.
- */
- pthread_mutex_t lock;
-
- int enabled;
- /* started: has the session been in started state at any time ? */
- int started; /* allows detection of start vs restart. */
- int handle; /* used has unique identifier for app session */
-
- /*
- * Tracing session ID. Multiple ust app session can have the same tracing
- * session id making this value NOT unique to the object.
- */
- uint64_t tracing_id;
- uint64_t id; /* Unique session identifier */
- struct lttng_ht *channels; /* Registered channels */
- struct lttng_ht_node_u64 node;
- char path[PATH_MAX];
- /* UID/GID of the application owning the session */
- uid_t uid;
- gid_t gid;
- /* Effective UID and GID. Same as the tracing session. */
- uid_t euid;
- gid_t egid;
- struct cds_list_head teardown_node;
- /*
- * Once at least *one* session is created onto the application, the
- * corresponding consumer is set so we can use it on unregistration.
- */
- struct consumer_output *consumer;
- enum lttng_buffer_type buffer_type;
- /* ABI of the session. Same value as the application. */
- uint32_t bits_per_long;
- /* For delayed reclaim */
- struct rcu_head rcu_head;
- /* If the channel's streams have to be outputed or not. */
- unsigned int output_traces;
- unsigned int live_timer_interval; /* usec */
-
- /* Metadata channel attributes. */
- struct ustctl_consumer_channel_attr metadata_attr;
-};
-
-/*
- * Registered traceable applications. Libust registers to the session daemon
- * and a linked list is kept of all running traceable app.
- */
-struct ust_app {
- int sock;
- int notify_sock;
- pid_t pid;
- pid_t ppid;
- uid_t uid; /* User ID that owns the apps */
- gid_t gid; /* Group ID that owns the apps */
-
- /* App ABI */
- uint32_t bits_per_long;
- uint32_t uint8_t_alignment;
- uint32_t uint16_t_alignment;
- uint32_t uint32_t_alignment;
- uint32_t uint64_t_alignment;
- uint32_t long_alignment;
- int byte_order; /* BIG_ENDIAN or LITTLE_ENDIAN */
-
- int compatible; /* If the lttng-ust tracer version does not match the
- supported version of the session daemon, this flag is
- set to 0 (NOT compatible) else 1. */
- struct lttng_ust_tracer_version version;
- uint32_t v_major; /* Version major number */
- uint32_t v_minor; /* Version minor number */
- /* Extra for the NULL byte. */
- char name[UST_APP_PROCNAME_LEN + 1];
- /* Type of buffer this application uses. */
- enum lttng_buffer_type buffer_type;
- struct lttng_ht *sessions;
- struct lttng_ht_node_ulong pid_n;
- struct lttng_ht_node_ulong sock_n;
- struct lttng_ht_node_ulong notify_sock_n;
- /*
- * This is a list of ust app session that, once the app is going into
- * teardown mode, in the RCU call, each node in this list is removed and
- * deleted.
- *
- * Element of the list are added when an application unregisters after each
- * ht_del of ust_app_session associated to this app. This list is NOT used
- * when a session is destroyed.
- */
- struct cds_list_head teardown_head;
- /*
- * Hash table containing ust_app_channel indexed by channel objd.
- */
- struct lttng_ht *ust_objd;
-
- /*
- * If this application is of the agent domain and this is non negative then
- * a lookup MUST be done to acquire a read side reference to the
- * corresponding agent app object. If the lookup fails, this should be set
- * to a negative value indicating that the agent application is gone.
- */
- int agent_app_sock;
-};
-
-#ifdef HAVE_LIBLTTNG_UST_CTL
-
-int ust_app_register(struct ust_register_msg *msg, int sock);
-static inline
-int ust_app_register_done(int sock)
-{
- return ustctl_register_done(sock);
-}
-int ust_app_version(struct ust_app *app);
-void ust_app_unregister(int sock);
-int ust_app_start_trace_all(struct ltt_ust_session *usess);
-int ust_app_stop_trace_all(struct ltt_ust_session *usess);
-int ust_app_destroy_trace_all(struct ltt_ust_session *usess);
-int ust_app_list_events(struct lttng_event **events);
-int ust_app_list_event_fields(struct lttng_event_field **fields);
-int ust_app_create_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan);
-int ust_app_create_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
-int ust_app_enable_event_pid(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- pid_t pid);
-int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan);
-int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan);
-int ust_app_enable_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
-int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan);
-int ust_app_disable_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent);
-int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx);
-void ust_app_global_update(struct ltt_ust_session *usess, int sock);
-
-void ust_app_clean_list(void);
-int ust_app_ht_alloc(void);
-struct ust_app *ust_app_find_by_pid(pid_t pid);
-int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate);
-struct ust_app_stream *ust_app_alloc_stream(void);
-int ust_app_recv_registration(int sock, struct ust_register_msg *msg);
-int ust_app_recv_notify(int sock);
-void ust_app_add(struct ust_app *app);
-struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock);
-void ust_app_notify_sock_unregister(int sock);
-ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
- struct consumer_socket *socket, int send_zero_data);
-void ust_app_destroy(struct ust_app *app);
-int ust_app_snapshot_record(struct ltt_ust_session *usess,
- struct snapshot_output *output, int wait, uint64_t max_stream_size);
-unsigned int ust_app_get_nb_stream(struct ltt_ust_session *usess);
-struct ust_app *ust_app_find_by_sock(int sock);
-
-static inline
-int ust_app_supported(void)
-{
- return 1;
-}
-
-#else /* HAVE_LIBLTTNG_UST_CTL */
-
-static inline
-int ust_app_destroy_trace_all(struct ltt_ust_session *usess)
-{
- return 0;
-}
-static inline
-int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app)
-{
- return 0;
-}
-static inline
-int ust_app_start_trace_all(struct ltt_ust_session *usess)
-{
- return 0;
-}
-static inline
-int ust_app_stop_trace_all(struct ltt_ust_session *usess)
-{
- return 0;
-}
-static inline
-int ust_app_list_events(struct lttng_event **events)
-{
- return -ENOSYS;
-}
-static inline
-int ust_app_list_event_fields(struct lttng_event_field **fields)
-{
- return -ENOSYS;
-}
-static inline
-int ust_app_register(struct ust_register_msg *msg, int sock)
-{
- return -ENOSYS;
-}
-static inline
-int ust_app_register_done(int sock)
-{
- return -ENOSYS;
-}
-static inline
-int ust_app_version(struct ust_app *app)
-{
- return -ENOSYS;
-}
-static inline
-void ust_app_unregister(int sock)
-{
-}
-static inline
-void ust_app_lock_list(void)
-{
-}
-static inline
-void ust_app_unlock_list(void)
-{
-}
-static inline
-void ust_app_clean_list(void)
-{
-}
-static inline
-struct ust_app_list *ust_app_get_list(void)
-{
- return NULL;
-}
-static inline
-struct ust_app *ust_app_get_by_pid(pid_t pid)
-{
- return NULL;
-}
-static inline
-void ust_app_ht_alloc(void)
-{}
-static inline
-void ust_app_global_update(struct ltt_ust_session *usess, int sock)
-{}
-static inline
-int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan)
-{
- return 0;
-}
-static inline
-int ust_app_enable_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan)
-{
- return 0;
-}
-static inline
-int ust_app_create_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan)
-{
- return 0;
-}
-static inline
-int ust_app_enable_all_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan)
-{
- return 0;
-}
-static inline
-int ust_app_create_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
-{
- return 0;
-}
-static inline
-int ust_app_disable_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
-{
- return 0;
-}
-static inline
-int ust_app_enable_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent)
-{
- return 0;
-}
-static inline
-int ust_app_add_ctx_channel_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_context *uctx)
-{
- return 0;
-}
-static inline
-int ust_app_enable_event_pid(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- pid_t pid)
-{
- return 0;
-}
-static inline
-int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
-{
- return 0;
-}
-static inline
-int ust_app_recv_registration(int sock, struct ust_register_msg *msg)
-{
- return 0;
-}
-static inline
-int ust_app_recv_notify(int sock)
-{
- return 0;
-}
-static inline
-struct ust_app *ust_app_create(struct ust_register_msg *msg, int sock)
-{
- return NULL;
-}
-static inline
-void ust_app_add(struct ust_app *app)
-{
-}
-static inline
-void ust_app_notify_sock_unregister(int sock)
-{
-}
-static inline
-ssize_t ust_app_push_metadata(struct ust_registry_session *registry,
- struct consumer_socket *socket, int send_zero_data)
-{
- return 0;
-}
-static inline
-void ust_app_destroy(struct ust_app *app)
-{
- return;
-}
-static inline
-int ust_app_snapshot_record(struct ltt_ust_session *usess,
- struct snapshot_output *output, int wait, uint64_t max_stream_size)
-{
- return 0;
-}
-static inline
-unsigned int ust_app_get_nb_stream(struct ltt_ust_session *usess)
-{
- return 0;
-}
-
-static inline
-int ust_app_supported(void)
-{
- return 0;
-}
-static inline
-struct ust_app *ust_app_find_by_sock(int sock)
-{
- return NULL;
-}
-static inline
-struct ust_app *ust_app_find_by_pid(pid_t pid)
-{
- return NULL;
-}
-
-#endif /* HAVE_LIBLTTNG_UST_CTL */
-
-#endif /* _LTT_UST_APP_H */
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