2007-03-14 Martin Hunt <hunt@redhat.com>

	* transport_msgs.h: ifdef old messages as such.
	Add support for new transport.
	* relayfs.c: Simplify and add new interface to look
	like utt.
	* utt.[ch]: New files. Similar to the proposed utt interface.
	These setup and teardown relayfs on debugfs.
	* control.c: New file. Implements a simple control channel.
	A small subset of procfs.c.
	* procfs.c: This is now only used for old kernels lacking newer
	relayfs. Change STP_RELAYFS to STP_BULKMODE. Use new
	messages from transport_msgs.h. Don't support
	RELAYFS_CHANNEL_VERSION >= 4. CHanges all control channel functions
	to new names. Use pids instead of module names in /proc names.

1 files changed, 42 insertions, 0 deletions

diff --git a/runtime/transport/utt.h b/runtime/transport/utt.h
new file mode 100644
index 00000000..f6eba64b
--- /dev/null
+++ b/runtime/transport/utt.h
@@ -0,0 +1,42 @@
+#ifndef UTT_H
+#define UTT_H
+
+enum {
+	Utt_trace_setup = 1,
+	Utt_trace_running,
+	Utt_trace_stopped,
+};
+
+struct utt_trace {
+	int trace_state;
+	struct rchan *rchan;
+	unsigned long *sequence;
+	struct dentry *dropped_file;
+	atomic_t dropped;
+	struct dentry *utt_tree_root;
+	void *private_data;
+};
+
+#define UTT_TRACE_ROOT_NAME_SIZE	32	/* Largest string for a root dir identifier */
+#define UTT_TRACE_NAME_SIZE		32	/* Largest string for a trace identifier */
+
+/*
+ * User setup structure
+ */
+struct utt_trace_setup {
+	char root[UTT_TRACE_ROOT_NAME_SIZE];	/* input */
+	char name[UTT_TRACE_NAME_SIZE];		/* input */
+	u32 buf_size;				/* input */
+	u32 buf_nr;				/* input */
+	int is_global;				/* input */
+	int err;				/* output */
+};
+
+
+extern struct utt_trace *utt_trace_setup(struct utt_trace_setup *utts);
+extern int utt_trace_startstop(struct utt_trace *utt, int start,
+			       unsigned int *trace_seq);
+extern void utt_trace_cleanup(struct utt_trace *utt);
+extern int utt_trace_remove(struct utt_trace *utt);
+
+#endif