RCU support for consumer's hash tables

[lttng-tools.git] / include / lttng / lttng.h

diff --git a/include/lttng/lttng.h b/include/lttng/lttng.h
index 62b3ca7c8608d09e9a46745e3bec981edf594696..f1c913b66b639f5244bb0282e1b734282df85656 100644 (file)
--- a/include/lttng/lttng.h
+++ b/include/lttng/lttng.h
@@ -39,7 +39,7 @@
 /*
  * Event symbol length. Copied from LTTng kernel ABI.
  */
-#define LTTNG_SYMBOL_NAME_LEN 128
+#define LTTNG_SYMBOL_NAME_LEN 256
 
 /*
  * Every lttng_event_* structure both apply to kernel event and user-space
@@ -68,6 +68,7 @@ enum lttng_event_type {
        LTTNG_EVENT_FUNCTION_ENTRY            = 3,
        LTTNG_EVENT_NOOP                      = 4,
        LTTNG_EVENT_SYSCALL                   = 5,
+       LTTNG_EVENT_TRACEPOINT_LOGLEVEL       = 6,
 };
 
 /*
@@ -143,8 +144,11 @@ struct lttng_event_function_attr {
  */
 struct lttng_event {
        char name[LTTNG_SYMBOL_NAME_LEN];
+       char loglevel[LTTNG_SYMBOL_NAME_LEN];
+       int64_t loglevel_value;
        enum lttng_event_type type;
        uint32_t enabled;
+       pid_t pid;
        /* Per event type configuration */
        union {
                struct lttng_event_probe_attr probe;
@@ -168,7 +172,7 @@ struct lttng_channel_attr {
  * Channel information structure. For both kernel and user-space.
  */
 struct lttng_channel {
-       char name[NAME_MAX];
+       char name[LTTNG_SYMBOL_NAME_LEN];
        uint32_t enabled;
        struct lttng_channel_attr attr;
 };
@@ -188,6 +192,7 @@ struct lttng_session {
        char name[NAME_MAX];
        /* The path where traces are written */
        char path[PATH_MAX];
+       uint32_t enabled;       /* enabled/started: 1, disabled/stopped: 0 */
 };
 
 /*
@@ -208,7 +213,7 @@ struct lttng_handle {
  * array.
  *
  * On error, a negative value is returned being a specific lttng-tools error
- * code which can be humanly interpreted with lttng_get_readable_code(err).
+ * code which can be humanly interpreted with lttng_strerror(err).
  */
 
 /*
@@ -237,7 +242,7 @@ extern int lttng_create_session(const char *name, const char *path);
  * The session will not be useable anymore, tracing will stopped for all
  * registered trace and tracing buffers will be flushed.
  */
-extern int lttng_destroy_session(struct lttng_handle *handle);
+extern int lttng_destroy_session(const char *name);
 
 /*
  * List all tracing sessions.
@@ -251,7 +256,7 @@ extern int lttng_list_sessions(struct lttng_session **sessions);
  *
  * Return the size of the "lttng_domain" array. Caller must free(3).
  */
-extern int lttng_list_domains(struct lttng_handle *handle,
+extern int lttng_list_domains(const char *session_name,
                struct lttng_domain **domains);
 
 /*
@@ -293,7 +298,7 @@ extern int lttng_set_tracing_group(const char *name);
  *
  * Parameter MUST be a negative value or else you'll get a generic message.
  */
-extern const char *lttng_get_readable_code(int code);
+extern const char *lttng_strerror(int code);
 
 /*
  * This call permits to register an "outside consumer" to a session and a lttng
@@ -309,12 +314,12 @@ extern int lttng_register_consumer(struct lttng_handle *handle,
 /*
  * Start tracing for *all* registered trace (kernel and user-space).
  */
-extern int lttng_start_tracing(struct lttng_handle *handle);
+extern int lttng_start_tracing(const char *session_name);
 
 /*
  * Stop tracing for *all* registered trace (kernel and user-space).
  */
-extern int lttng_stop_tracing(struct lttng_handle *handle);
+extern int lttng_stop_tracing(const char *session_name);
 
 /*
  * Add context to event for a specific channel.
@@ -368,4 +373,11 @@ extern int lttng_disable_channel(struct lttng_handle *handle,
 extern int lttng_calibrate(struct lttng_handle *handle,
                struct lttng_calibrate *calibrate);
 
+/*
+ * Set the default channel attributes for a specific domain and an allocated
+ * lttng_channel_attr pointer.
+ */
+extern void lttng_channel_set_default_attr(struct lttng_domain *domain,
+               struct lttng_channel_attr *attr);
+
 #endif /* _LTTNG_H */