Merge tag 'm68k-for-v4.20-tag1' of git://git.kernel.org/pub/scm/linux/kernel/git...

[sfrench/cifs-2.6.git] / Documentation / networking / rxrpc.txt

diff --git a/Documentation/networking/rxrpc.txt b/Documentation/networking/rxrpc.txt
index b5407163d53bea922c58af999aeb4c49b17ed266..605e00cdd6beb1d024519ab8417464fc12064724 100644 (file)
--- a/Documentation/networking/rxrpc.txt
+++ b/Documentation/networking/rxrpc.txt
@@ -1069,6 +1069,31 @@ The kernel interface functions are as follows:
 
      This function may transmit a PING ACK.
 
+ (*) Get reply timestamp.
+
+       bool rxrpc_kernel_get_reply_time(struct socket *sock,
+                                        struct rxrpc_call *call,
+                                        ktime_t *_ts)
+
+     This allows the timestamp on the first DATA packet of the reply of a
+     client call to be queried, provided that it is still in the Rx ring.  If
+     successful, the timestamp will be stored into *_ts and true will be
+     returned; false will be returned otherwise.
+
+ (*) Get remote client epoch.
+
+       u32 rxrpc_kernel_get_epoch(struct socket *sock,
+                                  struct rxrpc_call *call)
+
+     This allows the epoch that's contained in packets of an incoming client
+     call to be queried.  This value is returned.  The function always
+     successful if the call is still in progress.  It shouldn't be called once
+     the call has expired.  Note that calling this on a local client call only
+     returns the local epoch.
+
+     This value can be used to determine if the remote client has been
+     restarted as it shouldn't change otherwise.
+
 
 =======================
 CONFIGURABLE PARAMETERS