X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=ltt-events.h;h=a5a57fcdf016c868c5ee0fe50f31afb2e07efd6d;hb=0f034e0f5fac7dd35c19e82f1773ec293fdb2dcd;hp=1419fb67219e047c6125ebf9af4183a7c8bc0a51;hpb=acd614cc4d30407efd46a528e29dadb403d25ffb;p=lttng-modules.git

diff --git a/ltt-events.h b/ltt-events.h
index 1419fb67..a5a57fcd 100644
--- a/ltt-events.h
+++ b/ltt-events.h
@@ -14,9 +14,14 @@
 #include <linux/kprobes.h>
 #include "ltt-debugfs-abi.h"
 
+#undef is_signed_type
+#define is_signed_type(type)		(((type)(-1)) < 0)
+
 struct ltt_channel;
 struct ltt_session;
 struct lib_ring_buffer_ctx;
+struct perf_event;
+struct perf_event_attr;
 
 /* Type description */
 
@@ -43,17 +48,17 @@ struct lttng_enum_entry {
 	const char *string;
 };
 
-#define __type_integer(_type, _byte_order, _base)		\
+#define __type_integer(_type, _byte_order, _base, _encoding)	\
 	{							\
 	    .atype = atype_integer,				\
 	    .u.basic.integer =					\
 		{						\
-		  .size = sizeof(_type),			\
+		  .size = sizeof(_type) * CHAR_BIT,		\
 		  .alignment = ltt_alignof(_type) * CHAR_BIT,	\
 		  .signedness = is_signed_type(_type),		\
 		  .reverse_byte_order = _byte_order != __BYTE_ORDER,	\
 		  .base = _base,				\
-		  .encoding = lttng_encode_none,		\
+		  .encoding = lttng_encode_##_encoding,		\
 		},						\
 	}							\
 
@@ -112,11 +117,35 @@ struct lttng_event_field {
 	struct lttng_type type;
 };
 
+struct lttng_ctx_field {
+	struct lttng_event_field event_field;
+	size_t (*get_size)(size_t offset);
+	void (*record)(struct lttng_ctx_field *field,
+		       struct lib_ring_buffer_ctx *ctx,
+		       struct ltt_channel *chan);
+	union {
+		struct {
+			struct perf_event **e;	/* per-cpu array */
+			struct list_head head;
+			struct perf_event_attr *attr;
+		} perf_counter;
+	} u;
+	void (*destroy)(struct lttng_ctx_field *field);
+};
+
+struct lttng_ctx {
+	struct lttng_ctx_field *fields;
+	unsigned int nr_fields;
+	unsigned int allocated_fields;
+};
+
 struct lttng_event_desc {
-	const struct lttng_event_field *fields;
 	const char *name;
 	void *probe_callback;
+	const struct lttng_event_ctx *ctx;	/* context */
+	const struct lttng_event_field *fields;	/* event payload */
 	unsigned int nr_fields;
+	struct module *owner;
 };
 
 struct lttng_probe_desc {
@@ -134,6 +163,7 @@ struct ltt_event {
 	struct ltt_channel *chan;
 	const struct lttng_event_desc *desc;
 	void *filter;
+	struct lttng_ctx *ctx;
 	enum lttng_kernel_instrumentation instrumentation;
 	union {
 		struct {
@@ -158,7 +188,8 @@ struct ltt_channel_ops {
 	void (*channel_destroy)(struct channel *chan);
 	struct lib_ring_buffer *(*buffer_read_open)(struct channel *chan);
 	void (*buffer_read_close)(struct lib_ring_buffer *buf);
-	int (*event_reserve)(struct lib_ring_buffer_ctx *ctx);
+	int (*event_reserve)(struct lib_ring_buffer_ctx *ctx,
+			     uint32_t event_id);
 	void (*event_commit)(struct lib_ring_buffer_ctx *ctx);
 	void (*event_write)(struct lib_ring_buffer_ctx *ctx, const void *src,
 			    size_t len);
@@ -174,6 +205,7 @@ struct ltt_channel_ops {
 struct ltt_channel {
 	unsigned int id;
 	struct channel *chan;		/* Channel buffers */
+	struct lttng_ctx *ctx;
 	/* Event ID management */
 	struct ltt_session *session;
 	struct file *file;		/* File associated to channel */
@@ -187,6 +219,7 @@ struct ltt_channel {
 
 struct ltt_session {
 	int active;			/* Is trace session active ? */
+	int been_active;		/* Has trace session been active ? */
 	struct file *file;		/* File associated to session */
 	struct ltt_channel *metadata;	/* Metadata channel */
 	struct list_head chan;		/* Channel list head */
@@ -220,13 +253,10 @@ struct ltt_channel *ltt_global_channel_create(struct ltt_session *session,
 				       size_t subbuf_size, size_t num_subbuf,
 				       unsigned int switch_timer_interval,
 				       unsigned int read_timer_interval);
-void _ltt_channel_destroy(struct ltt_channel *chan);
 
 struct ltt_event *ltt_event_create(struct ltt_channel *chan,
-				   char *name,
 				   struct lttng_kernel_event *event_param,
 				   void *filter);
-int ltt_event_unregister(struct ltt_event *event);
 
 void ltt_transport_register(struct ltt_transport *transport);
 void ltt_transport_unregister(struct ltt_transport *transport);
@@ -240,6 +270,9 @@ const struct lttng_event_desc *ltt_event_get(const char *name);
 void ltt_event_put(const struct lttng_event_desc *desc);
 int ltt_probes_init(void);
 void ltt_probes_exit(void);
+struct lttng_ctx_field *lttng_append_context(struct lttng_ctx **ctx);
+void lttng_destroy_context(struct lttng_ctx *ctx);
+int lttng_add_pid_to_ctx(struct lttng_ctx **ctx);
 
 #ifdef CONFIG_KPROBES
 int lttng_kprobes_register(const char *name,
@@ -248,6 +281,7 @@ int lttng_kprobes_register(const char *name,
 		uint64_t addr,
 		struct ltt_event *event);
 void lttng_kprobes_unregister(struct ltt_event *event);
+void lttng_kprobes_destroy_private(struct ltt_event *event);
 #else
 static inline
 int lttng_kprobes_register(const char *name,
@@ -259,9 +293,15 @@ int lttng_kprobes_register(const char *name,
 	return -ENOSYS;
 }
 
+static inline
 void lttng_kprobes_unregister(struct ltt_event *event)
 {
 }
+
+static inline
+void lttng_kprobes_destroy_private(struct ltt_event *event)
+{
+}
 #endif
 
 #ifdef CONFIG_DYNAMIC_FTRACE
@@ -269,6 +309,7 @@ int lttng_ftrace_register(const char *name,
 			  const char *symbol_name,
 			  struct ltt_event *event);
 void lttng_ftrace_unregister(struct ltt_event *event);
+void lttng_ftrace_destroy_private(struct ltt_event *event);
 #else
 static inline
 int lttng_ftrace_register(const char *name,
@@ -282,5 +323,13 @@ static inline
 void lttng_ftrace_unregister(struct ltt_event *event)
 {
 }
+
+static inline
+void lttng_ftrace_destroy_private(struct ltt_event *event)
+{
+}
 #endif
+
+extern const struct file_operations lttng_tracepoint_list_fops;
+
 #endif /* _LTT_EVENTS_H */