struct lttng_event_field {
const char *name;
struct lttng_type type;
+ unsigned int nowrite:1, /* do not write into trace */
+ user:1; /* fetch from user-space */
+};
+
+union lttng_ctx_value {
+ int64_t s64;
+ const char *str;
+ double d;
};
/*
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_ctx_field *fields;
unsigned int nr_fields;
unsigned int allocated_fields;
+ size_t largest_align; /* in bytes */
};
struct lttng_event_desc {
};
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_channel_ops 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 */
struct lttng_transport *transport;
struct lttng_event **sc_table; /* for syscall tracing */
struct lttng_event **compat_sc_table;
+ struct lttng_event **sc_exit_table; /* for syscall exit tracing */
+ struct lttng_event **compat_sc_exit_table;
struct lttng_event *sc_unknown; /* for unknown syscalls */
struct lttng_event *sc_compat_unknown;
- struct lttng_event *sc_exit; /* for syscall exit */
+ struct lttng_event *sc_exit_unknown;
+ struct lttng_event *compat_sc_exit_unknown;
+ struct lttng_syscall_filter *sc_filter;
int header_type; /* 0: unset, 1: compact, 2: large */
enum channel_type channel_type;
- unsigned int metadata_dumped:1;
+ unsigned int metadata_dumped:1,
+ sys_enter_registered:1,
+ sys_exit_registered:1,
+ syscall_all:1,
+ tstate:1; /* Transient enable state */
};
struct lttng_metadata_stream {
wait_queue_head_t read_wait; /* Reader buffer-level wait queue */
struct list_head list; /* Stream list */
struct lttng_transport *transport;
- 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 {
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 {
unsigned int metadata_written; /* Number of bytes written in metadata cache */
struct kref refcount; /* Metadata cache usage */
struct list_head metadata_stream; /* Metadata stream list */
+ uuid_le uuid; /* Trace session unique ID (copy) */
+ struct mutex lock;
};
+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);
+int lttng_syscall_filter_enable(struct lttng_channel *chan,
+ const char *name);
+int lttng_syscall_filter_disable(struct lttng_channel *chan,
+ const char *name);
+long lttng_channel_syscall_mask(struct lttng_channel *channel,
+ struct lttng_kernel_syscall_mask __user *usyscall_mask);
#else
static inline int lttng_syscalls_register(struct lttng_channel *chan, void *filter)
{
{
return 0;
}
+
+static inline int lttng_syscall_filter_enable(struct lttng_channel *chan,
+ const char *name)
+{
+ return -ENOSYS;
+}
+
+static inline int lttng_syscall_filter_disable(struct lttng_channel *chan,
+ const char *name)
+{
+ return -ENOSYS;
+}
+
+static inline long lttng_channel_syscall_mask(struct lttng_channel *channel,
+ struct lttng_kernel_syscall_mask __user *usyscall_mask)
+{
+ return -ENOSYS;
+}
#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);
+void lttng_enabler_event_link_bytecode(struct lttng_event *event,
+ struct lttng_enabler *enabler);
+
+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);
int lttng_add_pid_to_ctx(struct lttng_ctx **ctx);
+int lttng_add_cpu_id_to_ctx(struct lttng_ctx **ctx);
int lttng_add_procname_to_ctx(struct lttng_ctx **ctx);
int lttng_add_prio_to_ctx(struct lttng_ctx **ctx);
int lttng_add_nice_to_ctx(struct lttng_ctx **ctx);
struct lttng_event *event_exit);
void lttng_kretprobes_unregister(struct lttng_event *event);
void lttng_kretprobes_destroy_private(struct lttng_event *event);
+int lttng_kretprobes_event_enable_state(struct lttng_event *event,
+ int enable);
#else
static inline
int lttng_kretprobes_register(const char *name,
void lttng_kretprobes_destroy_private(struct lttng_event *event)
{
}
+
+static inline
+int lttng_kretprobes_event_enable_state(struct lttng_event *event,
+ int enable)
+{
+ return -ENOSYS;
+}
#endif
#ifdef CONFIG_DYNAMIC_FTRACE
int lttng_calibrate(struct lttng_kernel_calibrate *calibrate);
extern const struct file_operations lttng_tracepoint_list_fops;
+extern const struct file_operations lttng_syscall_list_fops;
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,35))
#define TRACEPOINT_HAS_DATA_ARG
projects / lttng-modules.git / blobdiff