/*
* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@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,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#ifndef _LTT_UST_APP_H
+#ifndef _LTT_UST_APP_H
#define _LTT_UST_APP_H
#include <stdint.h>
-#include "trace-ust.h"
+#include <common/compat/uuid.h>
-/* lttng-ust supported version. */
-#define LTTNG_UST_COMM_MAJOR 2 /* comm protocol major version */
-#define UST_APP_MAJOR_VERSION 2 /* UST version supported */
+#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_filter_bytecode *filter;
+ enum lttng_ust_loglevel_type loglevel_type;
+ const struct lttng_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;
- char name[16];
+ 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];
};
/*
*/
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_context_attr ctx;
struct lttng_ust_object_data *obj;
struct lttng_ht_node_ulong node;
+ struct cds_list_head list;
};
struct ust_app_event {
struct lttng_ust_object_data *obj;
struct lttng_ust_event attr;
char name[LTTNG_UST_SYM_NAME_LEN];
- struct lttng_ht *ctx;
struct lttng_ht_node_str node;
+ struct lttng_filter_bytecode *filter;
+ struct lttng_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_channel attr;
struct lttng_ust_object_data *obj;
- struct ltt_ust_stream_list streams;
+ 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;
+ uint64_t monitor_timer_interval;
+ /*
+ * 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 */
- int id; /* session unique identifier */
- struct ltt_ust_metadata *metadata;
+
+ bool deleted; /* Session deleted flag. Check with lock held. */
+
+ /*
+ * 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_ulong node;
+ struct lttng_ht_node_u64 node;
+ /*
+ * Node indexed by UST session object descriptor (handle). Stored in the
+ * ust_sessions_objd hash table in the ust_app object.
+ */
+ struct lttng_ht_node_ulong ust_objd_node;
char path[PATH_MAX];
- /* UID/GID of the user owning the session */
+ /* 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;
+
+ char root_shm_path[PATH_MAX];
+ char shm_path[PATH_MAX];
};
/*
*/
struct ust_app {
int sock;
+ pthread_mutex_t sock_lock; /* Protects sock protocol. */
+
+ 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 */
- int bits_per_long;
+
+ /* 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; /* Verion major number */
- uint32_t v_minor; /* Verion minor number */
- char name[17]; /* Process name (short) */
+ 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;
+ /*
+ * Hash table containing ust_app_session indexed by objd.
+ */
+ struct lttng_ht *ust_sessions_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_register_done(struct ust_app *app);
+int ust_app_version(struct ust_app *app);
void ust_app_unregister(int sock);
-unsigned long ust_app_list_count(void);
-int ust_app_start_trace(struct ltt_ust_session *usess, struct ust_app *app);
-int ust_app_stop_trace(struct ltt_ust_session *usess, struct ust_app *app);
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(struct ltt_ust_session *usess, struct ust_app *app);
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);
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_disable_event_pid(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- pid_t pid);
int ust_app_enable_event_pid(struct ltt_ust_session *usess,
struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
pid_t pid);
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_disable_all_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan);
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_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- struct ltt_ust_context *uctx);
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_global_update(struct ltt_ust_session *usess, struct ust_app *app);
+void ust_app_global_update_all(struct ltt_ust_session *usess);
void ust_app_clean_list(void);
-void ust_app_ht_alloc(void);
-struct lttng_ht *ust_app_get_ht(void);
+int ust_app_ht_alloc(void);
struct ust_app *ust_app_find_by_pid(pid_t pid);
-int ust_app_validate_version(int sock);
-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 nb_packets_per_stream);
+uint64_t ust_app_get_size_one_more_packet_per_stream(
+ struct ltt_ust_session *usess, uint64_t cur_nr_packets);
+struct ust_app *ust_app_find_by_sock(int sock);
+int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
+ struct cds_list_head *buffer_reg_uid_list,
+ struct consumer_output *consumer, uint64_t uchan_id,
+ int overwrite, uint64_t *discarded, uint64_t *lost);
+int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan,
+ struct consumer_output *consumer,
+ int overwrite, uint64_t *discarded, uint64_t *lost);
+int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess);
+
+static inline
+int ust_app_supported(void)
+{
+ return 1;
+}
#else /* HAVE_LIBLTTNG_UST_CTL */
static inline
int ust_app_list_events(struct lttng_event **events)
{
- return 0;
+ 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)
+int ust_app_register_done(struct ust_app *app)
{
return -ENOSYS;
}
static inline
-void ust_app_unregister(int sock)
+int ust_app_version(struct ust_app *app)
{
+ return -ENOSYS;
}
static inline
-unsigned int ust_app_list_count(void)
+void ust_app_unregister(int sock)
{
- return 0;
}
static inline
void ust_app_lock_list(void)
return NULL;
}
static inline
-struct lttng_ht *ust_app_get_ht(void)
+int ust_app_ht_alloc(void)
{
- return NULL;
+ return 0;
}
static inline
-void ust_app_ht_alloc(void)
-{}
-static inline
-void ust_app_global_update(struct ltt_ust_session *usess, int sock)
+void ust_app_global_update(struct ltt_ust_session *usess, struct ust_app *app)
{}
static inline
int ust_app_disable_channel_glb(struct ltt_ust_session *usess,
return 0;
}
static inline
-int ust_app_disable_all_event_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_add_ctx_event_glb(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- struct ltt_ust_context *uctx)
-{
- 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_disable_event_pid(struct ltt_ust_session *usess,
- struct ltt_ust_channel *uchan, struct ltt_ust_event *uevent,
- pid_t pid)
+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
-int ust_app_validate_version(int sock)
+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
-int ust_app_calibrate_glb(struct lttng_ust_calibrate *calibrate)
+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;
+}
+static inline
+uint64_t ust_app_get_size_one_more_packet_per_stream(
+ struct ltt_ust_session *usess, uint64_t cur_nr_packets) {
+ return 0;
+}
+static inline
+int ust_app_uid_get_channel_runtime_stats(uint64_t ust_session_id,
+ struct cds_list_head *buffer_reg_uid_list,
+ struct consumer_output *consumer, int overwrite,
+ uint64_t uchan_id, uint64_t *discarded, uint64_t *lost)
+{
+ return 0;
+}
+
+static inline
+int ust_app_pid_get_channel_runtime_stats(struct ltt_ust_session *usess,
+ struct ltt_ust_channel *uchan,
+ struct consumer_output *consumer,
+ int overwrite, uint64_t *discarded, uint64_t *lost)
+{
+ return 0;
+}
+
+static inline
+int ust_app_regenerate_statedump_all(struct ltt_ust_session *usess)
{
return 0;
}
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