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Krister Johansen 3ad7d2468f Ipvlan should return an error when an address is already in use.
The ipvlan code already knows how to detect when a duplicate address is
about to be assigned to an ipvlan device.  However, that failure is not
propogated outward and leads to a silent failure.

Introduce a validation step at ip address creation time and allow device
drivers to register to validate the incoming ip addresses.  The ipvlan
code is the first consumer.  If it detects an address in use, we can
return an error to the user before beginning to commit the new ifa in
the networking code.

This can be especially useful if it is necessary to provision many
ipvlans in containers.  The provisioning software (or operator) can use
this to detect situations where an ip address is unexpectedly in use.

Signed-off-by: Krister Johansen <kjlx@templeofstupid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-09 12:26:07 -04:00
arch
block
certs
crypto
Documentation rxrpc: Provide a cmsg to specify the amount of Tx data for a call 2017-06-07 17:15:46 +01:00
drivers Ipvlan should return an error when an address is already in use. 2017-06-09 12:26:07 -04:00
firmware
fs rxrpc: Provide a cmsg to specify the amount of Tx data for a call 2017-06-07 17:15:46 +01:00
include Ipvlan should return an error when an address is already in use. 2017-06-09 12:26:07 -04:00
init
ipc
kernel
lib
mm
net Ipvlan should return an error when an address is already in use. 2017-06-09 12:26:07 -04:00
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README

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.