struct lttng_type type;
};
+union lttng_ctx_value {
+ int64_t s64;
+ const char *str;
+ double d;
+};
+
/*
* We need to keep this perf counter field separately from struct
* lttng_ctx_field because cpu hotplug needs fixed-location addresses.
void (*record)(struct lttng_ctx_field *field,
struct lib_ring_buffer_ctx *ctx,
struct lttng_channel *chan);
+ void (*get_value)(struct lttng_ctx_field *field,
+ union lttng_ctx_value *value);
union {
struct lttng_perf_counter_field *perf_counter;
} u;
};
struct lttng_probe_desc {
+ const char *provider;
const struct lttng_event_desc **event_desc;
unsigned int nr_events;
struct list_head head; /* chain registered probes */
+ struct list_head lazy_init_head;
+ int lazy; /* lazy registration */
};
struct lttng_krp; /* Kretprobe handling */
+enum lttng_event_type {
+ LTTNG_TYPE_EVENT = 0,
+ LTTNG_TYPE_ENABLER = 1,
+};
+
+struct lttng_filter_bytecode_node {
+ struct list_head node;
+ struct lttng_enabler *enabler;
+ /*
+ * struct lttng_kernel_filter_bytecode has var. sized array, must be
+ * last field.
+ */
+ struct lttng_kernel_filter_bytecode bc;
+};
+
+/*
+ * Filter return value masks.
+ */
+enum lttng_filter_ret {
+ LTTNG_FILTER_DISCARD = 0,
+ LTTNG_FILTER_RECORD_FLAG = (1ULL << 0),
+ /* Other bits are kept for future use. */
+};
+
+struct lttng_bytecode_runtime {
+ /* Associated bytecode */
+ struct lttng_filter_bytecode_node *bc;
+ uint64_t (*filter)(void *filter_data, const char *filter_stack_data);
+ int link_failed;
+ struct list_head node; /* list of bytecode runtime in event */
+};
+
+/*
+ * Objects in a linked-list of enablers, owned by an event.
+ */
+struct lttng_enabler_ref {
+ struct list_head node; /* enabler ref list */
+ struct lttng_enabler *ref; /* backward ref */
+};
+
/*
* lttng_event structure is referred to by the tracing fast path. It must be
* kept small.
*/
struct lttng_event {
+ enum lttng_event_type evtype; /* First field. */
unsigned int id;
struct lttng_channel *chan;
int enabled;
char *symbol_name;
} ftrace;
} u;
- struct list_head list; /* Event list */
+ struct list_head list; /* Event list in session */
unsigned int metadata_dumped:1;
+
+ /* Backward references: list of lttng_enabler_ref (ref to enablers) */
+ struct list_head enablers_ref_head;
+ struct hlist_node hlist; /* session ht of events */
+ int registered; /* has reg'd tracepoint probe */
+ /* list of struct lttng_bytecode_runtime, sorted by seqnum */
+ struct list_head bytecode_runtime_head;
+ int has_enablers_without_bytecode;
+};
+
+enum lttng_enabler_type {
+ LTTNG_ENABLER_WILDCARD,
+ LTTNG_ENABLER_NAME,
+};
+
+/*
+ * Enabler field, within whatever object is enabling an event. Target of
+ * backward reference.
+ */
+struct lttng_enabler {
+ enum lttng_event_type evtype; /* First field. */
+
+ enum lttng_enabler_type type;
+
+ struct list_head node; /* per-session list of enablers */
+ /* head list of struct lttng_ust_filter_bytecode_node */
+ struct list_head filter_bytecode_head;
+
+ struct lttng_kernel_event event_param;
+ struct lttng_channel *chan;
+ struct lttng_ctx *ctx;
+ unsigned int enabled:1;
};
struct lttng_channel_ops {
struct lttng_syscall_filter;
+#define LTTNG_EVENT_HT_BITS 12
+#define LTTNG_EVENT_HT_SIZE (1U << LTTNG_EVENT_HT_BITS)
+
+struct lttng_event_ht {
+ struct hlist_head table[LTTNG_EVENT_HT_SIZE];
+};
+
struct lttng_channel {
unsigned int id;
struct channel *chan; /* Channel buffers */
unsigned int metadata_dumped:1,
sys_enter_registered:1,
sys_exit_registered:1,
- syscall_all:1;
+ syscall_all:1,
+ tstate:1; /* Transient enable state */
};
struct lttng_metadata_stream {
struct mutex lock;
};
+
+/*
+ * struct lttng_pid_tracker declared in header due to deferencing of *v
+ * in RCU_INITIALIZER(v).
+ */
+#define LTTNG_PID_HASH_BITS 6
+#define LTTNG_PID_TABLE_SIZE (1 << LTTNG_PID_HASH_BITS)
+
+struct lttng_pid_tracker {
+ struct hlist_head pid_hash[LTTNG_PID_TABLE_SIZE];
+};
+
+struct lttng_pid_hash_node {
+ struct hlist_node hlist;
+ int pid;
+};
+
struct lttng_session {
int active; /* Is trace session active ? */
int been_active; /* Has trace session been active ? */
unsigned int free_chan_id; /* Next chan ID to allocate */
uuid_le uuid; /* Trace session unique ID */
struct lttng_metadata_cache *metadata_cache;
- unsigned int metadata_dumped:1;
+ struct lttng_pid_tracker *pid_tracker;
+ unsigned int metadata_dumped:1,
+ tstate:1; /* Transient enable state */
+ /* List of enablers */
+ struct list_head enablers_head;
+ /* Hash table of events */
+ struct lttng_event_ht events_ht;
};
struct lttng_metadata_cache {
uuid_le uuid; /* Trace session unique ID (copy) */
};
+void lttng_lock_sessions(void);
+void lttng_unlock_sessions(void);
+
+struct list_head *lttng_get_probe_list_head(void);
+
+struct lttng_enabler *lttng_enabler_create(enum lttng_enabler_type type,
+ struct lttng_kernel_event *event_param,
+ struct lttng_channel *chan);
+
+int lttng_enabler_enable(struct lttng_enabler *enabler);
+int lttng_enabler_disable(struct lttng_enabler *enabler);
+int lttng_fix_pending_events(void);
+int lttng_session_active(void);
+
struct lttng_session *lttng_session_create(void);
int lttng_session_enable(struct lttng_session *session);
int lttng_session_disable(struct lttng_session *session);
void lttng_metadata_channel_destroy(struct lttng_channel *chan);
struct lttng_event *lttng_event_create(struct lttng_channel *chan,
- struct lttng_kernel_event *event_param,
- void *filter,
- const struct lttng_event_desc *internal_desc);
+ struct lttng_kernel_event *event_param,
+ void *filter,
+ const struct lttng_event_desc *event_desc,
+ enum lttng_kernel_instrumentation itype);
+struct lttng_event *_lttng_event_create(struct lttng_channel *chan,
+ struct lttng_kernel_event *event_param,
+ void *filter,
+ const struct lttng_event_desc *event_desc,
+ enum lttng_kernel_instrumentation itype);
struct lttng_event *lttng_event_compat_old_create(struct lttng_channel *chan,
struct lttng_kernel_old_event *old_event_param,
void *filter,
int lttng_metadata_output_channel(struct lttng_metadata_stream *stream,
struct channel *chan);
+int lttng_pid_tracker_get_node_pid(const struct lttng_pid_hash_node *node);
+struct lttng_pid_tracker *lttng_pid_tracker_create(void);
+void lttng_pid_tracker_destroy(struct lttng_pid_tracker *lpf);
+bool lttng_pid_tracker_lookup(struct lttng_pid_tracker *lpf, int pid);
+int lttng_pid_tracker_add(struct lttng_pid_tracker *lpf, int pid);
+int lttng_pid_tracker_del(struct lttng_pid_tracker *lpf, int pid);
+
+int lttng_session_track_pid(struct lttng_session *session, int pid);
+int lttng_session_untrack_pid(struct lttng_session *session, int pid);
+
+int lttng_session_list_tracker_pids(struct lttng_session *session);
+
#if defined(CONFIG_HAVE_SYSCALL_TRACEPOINTS)
int lttng_syscalls_register(struct lttng_channel *chan, void *filter);
int lttng_syscalls_unregister(struct lttng_channel *chan);
}
#endif
+void lttng_filter_sync_state(struct lttng_bytecode_runtime *runtime);
+int lttng_enabler_attach_bytecode(struct lttng_enabler *enabler,
+ struct lttng_kernel_filter_bytecode __user *bytecode);
+
+extern struct lttng_ctx *lttng_static_ctx;
+
+int lttng_context_init(void);
+void lttng_context_exit(void);
struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx);
void lttng_context_update(struct lttng_ctx *ctx);
int lttng_find_context(struct lttng_ctx *ctx, const char *name);
+int lttng_get_context_index(struct lttng_ctx *ctx, const char *name);
void lttng_remove_context_field(struct lttng_ctx **ctx,
struct lttng_ctx_field *field);
void lttng_destroy_context(struct lttng_ctx *ctx);
projects / lttng-modules.git / blobdiff