1 files changed, 19 insertions, 16 deletions

diff --git a/include/linux/sysctl.h b/include/linux/sysctl.h
index 1b24bd45e080..94316a98e0d0 100644
--- a/include/linux/sysctl.h
+++ b/include/linux/sysctl.h
@@ -6,10 +6,17 @@
  ****************************************************************
  ****************************************************************
  **
+ **  WARNING:
  **  The values in this file are exported to user space via 
- **  the sysctl() binary interface.  However this interface
- **  is unstable and deprecated and will be removed in the future. 
- **  For a stable interface use /proc/sys.
+ **  the sysctl() binary interface.  Do *NOT* change the
+ **  numbering of any existing values here, and do not change
+ **  any numbers within any one set of values.  If you have to
+ **  have to redefine an existing interface, use a new number for it.
+ **  The kernel will then return -ENOTDIR to any application using
+ **  the old binary interface.
+ **
+ **  For new interfaces unless you really need a binary number
+ **  please use CTL_UNNUMBERED.
  **
  ****************************************************************
  ****************************************************************
@@ -48,6 +55,7 @@ struct __sysctl_args {
 #ifdef __KERNEL__
 #define CTL_ANY         -1      /* Matches any name */
 #define CTL_NONE        0
+#define CTL_UNNUMBERED  CTL_NONE        /* sysctl without a binary number */
 #endif
 
 enum
@@ -418,6 +426,8 @@ enum
         NET_CIPSOV4_CACHE_BUCKET_SIZE=119,
         NET_CIPSOV4_RBM_OPTFMT=120,
         NET_CIPSOV4_RBM_STRICTVALID=121,
+        NET_TCP_AVAIL_CONG_CONTROL=122,
+        NET_TCP_ALLOWED_CONG_CONTROL=123,
 };
 
 enum {
@@ -596,16 +606,6 @@ enum {
         NET_DCCP_DEFAULT=1,
 };
 
-/* /proc/sys/net/dccp/default */
-enum {
-        NET_DCCP_DEFAULT_SEQ_WINDOW  = 1,
-        NET_DCCP_DEFAULT_RX_CCID     = 2,
-        NET_DCCP_DEFAULT_TX_CCID     = 3,
-        NET_DCCP_DEFAULT_ACK_RATIO   = 4,
-        NET_DCCP_DEFAULT_SEND_ACKVEC = 5,
-        NET_DCCP_DEFAULT_SEND_NDP    = 6,
-};
-
 /* /proc/sys/net/ipx */
 enum {
         NET_IPX_PPROP_BROADCASTING=1,
@@ -961,8 +961,8 @@ extern ctl_handler sysctl_ms_jiffies;
 /*
  * Register a set of sysctl names by calling register_sysctl_table
  * with an initialised array of ctl_table's.  An entry with zero
- * ctl_name terminates the table.  table->de will be set up by the
- * registration and need not be initialised in advance.
+ * ctl_name and NULL procname terminates the table.  table->de will be
+ * set up by the registration and need not be initialised in advance.
  *
  * sysctl names can be mirrored automatically under /proc/sys.  The
  * procname supplied controls /proc naming.
@@ -973,7 +973,10 @@ extern ctl_handler sysctl_ms_jiffies;
  * Leaf nodes in the sysctl tree will be represented by a single file
  * under /proc; non-leaf nodes will be represented by directories.  A
  * null procname disables /proc mirroring at this node.
- * 
+ *
+ * sysctl entries with a zero ctl_name will not be available through
+ * the binary sysctl interface.
+ *
  * sysctl(2) can automatically manage read and write requests through
  * the sysctl table.  The data and maxlen fields of the ctl_table
  * struct enable minimal validation of the values being written to be