Add prio and nice contexts

[lttng-modules.git] / ltt-events.h

diff --git a/ltt-events.h b/ltt-events.h
index 4179fb7c6720e7107f78d2d492f393d8fbc00227..b9bb3bb95d8bba919729afabd17f135a76fe9791 100644 (file)
--- a/ltt-events.h
+++ b/ltt-events.h
@@ -14,6 +14,9 @@
 #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;
@@ -115,9 +118,11 @@ struct lttng_event_field {
 };
 
 struct lttng_ctx_field {
-       const char *name;
-       struct lttng_type type;
-       void *callback;
+       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 */
@@ -125,6 +130,7 @@ struct lttng_ctx_field {
                        struct perf_event_attr *attr;
                } perf_counter;
        } u;
+       void (*destroy)(struct lttng_ctx_field *field);
 };
 
 struct lttng_ctx {
@@ -157,6 +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 {
@@ -198,6 +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 */
@@ -211,6 +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 */
@@ -261,6 +270,12 @@ 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);
+int lttng_add_comm_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);
 
 #ifdef CONFIG_KPROBES
 int lttng_kprobes_register(const char *name,
@@ -269,6 +284,7 @@ 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,
@@ -284,6 +300,11 @@ 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
@@ -291,6 +312,7 @@ 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,
@@ -304,6 +326,11 @@ 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;