X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Fdpif-provider.h;h=c33faf12ea324ba33f98ee67f2c5eb1015e39b47;hb=39a501148a3d02974e32cb1a76ef3d6ba3c38419;hp=bd159b2a9d90ecd2d9a738160ad24fafc98820ac;hpb=3b01baa3970139c3a195017ab1ea3e42761e3db2;p=openvswitch

diff --git a/lib/dpif-provider.h b/lib/dpif-provider.h
index bd159b2a..c33faf12 100644
--- a/lib/dpif-provider.h
+++ b/lib/dpif-provider.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009 Nicira Networks.
+ * Copyright (c) 2009, 2010 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -42,7 +42,7 @@ static inline void dpif_assert_class(const struct dpif *dpif,
 }
 
 /* Datapath interface class structure, to be defined by each implementation of
- * a datapath interface
+ * a datapath interface.
  *
  * These functions return 0 if successful or a positive errno value on failure,
  * except where otherwise noted.
@@ -52,7 +52,7 @@ static inline void dpif_assert_class(const struct dpif *dpif,
  * EWOULDBLOCK or EINPROGRESS.  We may relax this requirement in the future if
  * and when we encounter performance problems. */
 struct dpif_class {
-    /* Prefix for names of dpifs in this class, e.g. "udatapath:".
+    /* Prefix for names of dpifs in this class, e.g. "netdev:".
      *
      * One dpif class may have the empty string "" as its prefix, in which case
      * that dpif class is associated with dpif names that don't match any other
@@ -278,6 +278,25 @@ struct dpif_class {
      * corresponding type when it calls the recv member function. */
     int (*recv_set_mask)(struct dpif *dpif, int listen_mask);
 
+    /* Retrieves 'dpif''s sFlow sampling probability into '*probability'.
+     * Return value is 0 or a positive errno value.  EOPNOTSUPP indicates that
+     * the datapath does not support sFlow, as does a null pointer.
+     *
+     * '*probability' is expressed as the number of packets out of UINT_MAX to
+     * sample, e.g. probability/UINT_MAX is the probability of sampling a given
+     * packet. */
+    int (*get_sflow_probability)(const struct dpif *dpif,
+                                 uint32_t *probability);
+
+    /* Sets 'dpif''s sFlow sampling probability to 'probability'.  Return value
+     * is 0 or a positive errno value.  EOPNOTSUPP indicates that the datapath
+     * does not support sFlow, as does a null pointer.
+     *
+     * 'probability' is expressed as the number of packets out of UINT_MAX to
+     * sample, e.g. probability/UINT_MAX is the probability of sampling a given
+     * packet. */
+    int (*set_sflow_probability)(struct dpif *dpif, uint32_t probability);
+
     /* Attempts to receive a message from 'dpif'.  If successful, stores the
      * message into '*packetp'.  The message, if one is received, must begin
      * with 'struct odp_msg' as a header.  Only messages of the types selected