IPoIB: Connected mode experimental support

[mirror_ubuntu-artful-kernel.git] / drivers / infiniband / ulp / ipoib / Kconfig

diff --git a/drivers/infiniband/ulp/ipoib/Kconfig b/drivers/infiniband/ulp/ipoib/Kconfig
index 13d6d01c72c028f92b68fa27c7115e8c9c13c950..af78ccc4ce7108aba6968b5438a0d8adbc7be4f2 100644 (file)
--- a/drivers/infiniband/ulp/ipoib/Kconfig
+++ b/drivers/infiniband/ulp/ipoib/Kconfig
@@ -1,13 +1,26 @@
 config INFINIBAND_IPOIB
        tristate "IP-over-InfiniBand"
-       depends on INFINIBAND && NETDEVICES && INET
+       depends on INFINIBAND && NETDEVICES && INET && (IPV6 || IPV6=n)
        ---help---
          Support for the IP-over-InfiniBand protocol (IPoIB). This
          transports IP packets over InfiniBand so you can use your IB
          device as a fancy NIC.
 
-         The IPoIB protocol is defined by the IETF ipoib working
-         group: <http://www.ietf.org/html.charters/ipoib-charter.html>.
+         See Documentation/infiniband/ipoib.txt for more information
+
+config INFINIBAND_IPOIB_CM
+       bool "IP-over-InfiniBand Connected Mode support"
+       depends on INFINIBAND_IPOIB && EXPERIMENTAL
+       default n
+       ---help---
+         This option enables experimental support for IPoIB connected mode.
+         After enabling this option, you need to switch to connected mode through
+         /sys/class/net/ibXXX/mode to actually create connections, and then increase
+         the interface MTU with e.g. ifconfig ib0 mtu 65520.
+
+         WARNING: Enabling connected mode will trigger some
+         packet drops for multicast and UD mode traffic from this interface,
+         unless you limit mtu for these destinations to 2044.
 
 config INFINIBAND_IPOIB_DEBUG
        bool "IP-over-InfiniBand debugging" if EMBEDDED
@@ -27,7 +40,7 @@ config INFINIBAND_IPOIB_DEBUG_DATA
        bool "IP-over-InfiniBand data path debugging"
        depends on INFINIBAND_IPOIB_DEBUG
        ---help---
-         This option compiles debugging code into the the data path
+         This option compiles debugging code into the data path
          of the IPoIB driver.  The output can be turned on via the
          data_debug_level module parameter; however, even with output
          turned off, this debugging code will have some performance