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authorLatchesar Ionkov <lucho@ionkov.net>2006-01-08 01:04:58 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:14:05 -0800
commit3cf6429a26da5c4d7b795e6d0f8f56ed2e4fdfc0 (patch)
treea8d856763fd9a0536519634c93ab92da684107fa /fs/9p/mux.h
parentf5ef3c105bee3a52486d7b55cef3330fcde9bca6 (diff)
[PATCH] v9fs: new multiplexer implementation
New multiplexer implementation. Decreases the number of kernel threads required. Better handling when the user process receives a signal. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/9p/mux.h')
-rw-r--r--fs/9p/mux.h40
1 files changed, 28 insertions, 12 deletions
diff --git a/fs/9p/mux.h b/fs/9p/mux.h
index 4994cb10bad..02b13b14b05 100644
--- a/fs/9p/mux.h
+++ b/fs/9p/mux.h
@@ -3,6 +3,7 @@
*
* Multiplexer Definitions
*
+ * Copyright (C) 2005 by Latchesar Ionkov <lucho@ionkov.net>
* Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
@@ -23,19 +24,34 @@
*
*/
-/* structure to manage each RPC transaction */
+struct v9fs_mux_data;
-struct v9fs_rpcreq {
- struct v9fs_fcall *tcall;
- struct v9fs_fcall *rcall;
- int err; /* error code if response failed */
+/**
+ * v9fs_mux_req_callback - callback function that is called when the
+ * response of a request is received. The callback is called from
+ * a workqueue and shouldn't block.
+ *
+ * @a - the pointer that was specified when the request was send to be
+ * passed to the callback
+ * @tc - request call
+ * @rc - response call
+ * @err - error code (non-zero if error occured)
+ */
+typedef void (*v9fs_mux_req_callback)(void *a, struct v9fs_fcall *tc,
+ struct v9fs_fcall *rc, int err);
+
+void v9fs_mux_global_init(void);
+void v9fs_mux_global_exit(void);
- /* XXX - could we put scatter/gather buffers here? */
+struct v9fs_mux_data *v9fs_mux_init(struct v9fs_transport *trans, int msize,
+ unsigned char *extended);
+void v9fs_mux_destroy(struct v9fs_mux_data *);
- struct list_head next;
-};
+int v9fs_mux_send(struct v9fs_mux_data *m, struct v9fs_fcall *tc);
+struct v9fs_fcall *v9fs_mux_recv(struct v9fs_mux_data *m);
+int v9fs_mux_rpc(struct v9fs_mux_data *m, struct v9fs_fcall *tc, struct v9fs_fcall **rc);
+int v9fs_mux_rpcnb(struct v9fs_mux_data *m, struct v9fs_fcall *tc,
+ v9fs_mux_req_callback cb, void *a);
-int v9fs_mux_init(struct v9fs_session_info *v9ses, const char *dev_name);
-long v9fs_mux_rpc(struct v9fs_session_info *v9ses,
- struct v9fs_fcall *tcall, struct v9fs_fcall **rcall);
-void v9fs_mux_cancel_requests(struct v9fs_session_info *v9ses, int err);
+void v9fs_mux_flush(struct v9fs_mux_data *m, int sendflush);
+void v9fs_mux_cancel(struct v9fs_mux_data *m, int err);