| commit | 17a67218587d40541ff522c6a86f354720481fbb | [log] [tgz] |
|---|---|---|
| author | Steven Luong <sluong@cisco.com> | Fri Aug 20 19:14:16 2021 -0700 |
| committer | Dave Wallace <dwallacelf@gmail.com> | Fri Aug 27 14:57:44 2021 +0000 |
| tree | 6af63fed9c4d3a91eba878ed8ce384c924694da7 | |
| parent | ba46778f55e51503fa47588faddea75efca9b655 [diff] |
vlib: vpp banner is outputted to non-interactive vppctl session
Running a batch file which contains many vppctl commands, occasionally,
VPP may spit out the banner for some of the commands. This happens
when VPP erroneously views the vppctl session as interactive.
A simple way to recreate the problem is to run a batch script as followed
while [ 1 ]
do
vppctl create loopback interface
vppctl delete loopback interface intfc loop0
done
We have two processes which may display the banner,
unix_cli_new_session_process and unix_cli_process. Normally,
unix_cli_process parses the input tokens and displays the banner after
it negotiates the terminal type with the vppctl app.
unix_cli_new_session_process only displays the banner just in case the
client fails to negotiate terminal type. It runs on a timer and expires
in 1 second to display the banner if by then the terminal type is still
not yet negotiated.
The problem is when the session is killed or exitted, VPP does not remove
the element that was enqueued for cli_new_session_process. The index
for the connection (cf) is recycled. The timer for the queue element
continues to run. When the timer expires for the queue element, it
finds the wrong new session due to index recycling. If the new
session has not had negotiated the terminal type, the banner is printed
erroneously to the new session from cli_new_session_process.
The fix is to clean up the queue element to stop cli_new_session_process
from processing the wrong connection when the session is killed.
Type: fix
Signed-off-by: Steven Luong <sluong@cisco.com>
Change-Id: Ife2f1b1c95661e442f0fc6b73505e330e6641fc1
The VPP platform is an extensible framework that provides out-of-the-box production quality switch/router functionality. It is the open source version of Cisco's Vector Packet Processing (VPP) technology: a high performance, packet-processing stack that can run on commodity CPUs.
The benefits of this implementation of VPP are its high performance, proven technology, its modularity and flexibility, and rich feature set.
For more information on VPP and its features please visit the FD.io website and What is VPP? pages.
Details of the changes leading up to this version of VPP can be found under @ref release_notes.
| Directory name | Description |
|---|---|
| build-data | Build metadata |
| build-root | Build output directory |
| doxygen | Documentation generator configuration |
| dpdk | DPDK patches and build infrastructure |
| @ref extras/libmemif | Client library for memif |
| @ref src/examples | VPP example code |
| @ref src/plugins | VPP bundled plugins directory |
| @ref src/svm | Shared virtual memory allocation library |
| src/tests | Standalone tests (not part of test harness) |
| src/vat | VPP API test program |
| @ref src/vlib | VPP application library |
| @ref src/vlibapi | VPP API library |
| @ref src/vlibmemory | VPP Memory management |
| @ref src/vnet | VPP networking |
| @ref src/vpp | VPP application |
| @ref src/vpp-api | VPP application API bindings |
| @ref src/vppinfra | VPP core library |
| @ref src/vpp/api | Not-yet-relocated API bindings |
| test | Unit tests and Python test harness |
In general anyone interested in building, developing or running VPP should consult the VPP wiki for more complete documentation.
In particular, readers are recommended to take a look at [Pulling, Building, Running, Hacking, Pushing](https://wiki.fd.io/view/VPP/Pulling,_Building,_Run ning,_Hacking_and_Pushing_VPP_Code) which provides extensive step-by-step coverage of the topic.
For the impatient, some salient information is distilled below.
To install system dependencies, build VPP and then install it, simply run the build script. This should be performed a non-privileged user with sudo access from the project base directory:
./extras/vagrant/build.sh
If you want a more fine-grained approach because you intend to do some development work, the Makefile in the root directory of the source tree provides several convenience shortcuts as make targets that may be of interest. To see the available targets run:
make
The directory extras/vagrant contains a VagrantFile and supporting scripts to bootstrap a working VPP inside a Vagrant-managed Virtual Machine. This VM can then be used to test concepts with VPP or as a development platform to extend VPP. Some obvious caveats apply when using a VM for VPP since its performance will never match that of bare metal; if your work is timing or performance sensitive, consider using bare metal in addition or instead of the VM.
For this to work you will need a working installation of Vagrant. Instructions for this can be found [on the Setting up Vagrant wiki page] (https://wiki.fd.io/view/DEV/Setting_Up_Vagrant).
Several modules provide documentation, see @subpage user_doc for more end-user-oriented information. Also see @subpage dev_doc for developer notes.
Visit the VPP wiki for details on more advanced building strategies and other development notes.
There is PyDoc generated documentation available for the VPP test framework. See @ref test_framework_doc for details.