test/crypto: fix flag check

[dpdk.git] / doc / guides / prog_guide / generic_segmentation_offload_lib.rst

diff --git a/doc/guides/prog_guide/generic_segmentation_offload_lib.rst b/doc/guides/prog_guide/generic_segmentation_offload_lib.rst
index ef1de53..205cb8a 100644 (file)
--- a/doc/guides/prog_guide/generic_segmentation_offload_lib.rst
+++ b/doc/guides/prog_guide/generic_segmentation_offload_lib.rst
@@ -1,32 +1,5 @@
-..  BSD LICENSE
-    Copyright(c) 2017 Intel Corporation. All rights reserved.
-    All rights reserved.
-
-    Redistribution and use in source and binary forms, with or without
-    modification, are permitted provided that the following conditions
-    are met:
-
-    * Redistributions of source code must retain the above copyright
-    notice, this list of conditions and the following disclaimer.
-    * Redistributions in binary form must reproduce the above copyright
-    notice, this list of conditions and the following disclaimer in
-    the documentation and/or other materials provided with the
-    distribution.
-    * Neither the name of Intel Corporation nor the names of its
-    contributors may be used to endorse or promote products derived
-    from this software without specific prior written permission.
-
-    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-    "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-    LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-    A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-    OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-    SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-    LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-    DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-    THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-    (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-    OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+..  SPDX-License-Identifier: BSD-3-Clause
+    Copyright(c) 2017 Intel Corporation.

 
 Generic Segmentation Offload Library
 ====================================
 
 Generic Segmentation Offload Library
 ====================================


@@ -70,6 +43,7 @@ Limitations
 #. Currently, the GSO library supports the following IPv4 packet types:
 
  - TCP
 #. Currently, the GSO library supports the following IPv4 packet types:
 
  - TCP

+ - UDP

  - VxLAN
  - GRE
 
  - VxLAN
  - GRE
 


@@ -173,6 +147,15 @@ TCP/IPv4 GSO
 TCP/IPv4 GSO supports segmentation of suitably large TCP/IPv4 packets, which
 may also contain an optional VLAN tag.
 
 TCP/IPv4 GSO supports segmentation of suitably large TCP/IPv4 packets, which
 may also contain an optional VLAN tag.
 

+UDP/IPv4 GSO
+~~~~~~~~~~~~
+UDP/IPv4 GSO supports segmentation of suitably large UDP/IPv4 packets, which
+may also contain an optional VLAN tag. UDP GSO is the same as IP fragmentation.
+Specifically, UDP GSO treats the UDP header as a part of the payload and
+does not modify it during segmentation. Therefore, after UDP GSO, only the
+first output packet has the original UDP header, and others just have l2
+and l3 headers.
+

 VxLAN GSO
 ~~~~~~~~~
 VxLAN packets GSO supports segmentation of suitably large VxLAN packets,
 VxLAN GSO
 ~~~~~~~~~
 VxLAN packets GSO supports segmentation of suitably large VxLAN packets,


@@ -223,7 +206,7 @@ To segment an outgoing packet, an application must:
 2. Set the appropriate ol_flags in the mbuf.
 
    - The GSO library use the value of an mbuf's ``ol_flags`` attribute to
 2. Set the appropriate ol_flags in the mbuf.
 
    - The GSO library use the value of an mbuf's ``ol_flags`` attribute to

-     to determine how a packet should be segmented. It is the application's
+     determine how a packet should be segmented. It is the application's

      responsibility to ensure that these flags are set.
 
    - For example, in order to segment TCP/IPv4 packets, the application should
      responsibility to ensure that these flags are set.
 
    - For example, in order to segment TCP/IPv4 packets, the application should


@@ -254,4 +237,3 @@ To segment an outgoing packet, an application must:
    For tunneled packets, the outer IPv4 headers' checksums should also be
    updated. Alternatively, the application may offload checksum calculation
    to HW.
    For tunneled packets, the outer IPv4 headers' checksums should also be
    updated. Alternatively, the application may offload checksum calculation
    to HW.

-