X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;f=lttng-events.h;h=d761360c7757009971ad9f6b8a5a0c0f3c0f561c;hb=7e6f9ef6f2e62dfe359b94562cd98197367ddbac;hp=e5cd0eeadeb6198b20958c34f68f517b13aa6710;hpb=082d4946ed719b3c73759ae88753c511624af952;p=lttng-modules.git

diff --git a/lttng-events.h b/lttng-events.h
index e5cd0eea..d761360c 100644
--- a/lttng-events.h
+++ b/lttng-events.h
@@ -167,6 +167,7 @@ struct lttng_ctx {
 	struct lttng_ctx_field *fields;
 	unsigned int nr_fields;
 	unsigned int allocated_fields;
+	size_t largest_align;	/* in bytes */
 };
 
 struct lttng_event_desc {
@@ -323,6 +324,23 @@ 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 ? */
@@ -333,6 +351,7 @@ 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;
+	struct lttng_pid_tracker *pid_tracker;
 	unsigned int metadata_dumped:1;
 };
 
@@ -398,6 +417,18 @@ void lttng_probes_exit(void);
 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);
@@ -448,6 +479,7 @@ int lttng_abi_syscall_list(void)
 #endif
 
 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);
 void lttng_remove_context_field(struct lttng_ctx **ctx,
 				struct lttng_ctx_field *field);