4dc8f4fbf5
There is an issue for requesting dynamic IP with ifup/ifdown command
when using dhclient.
Steps to reproduce:
1. Build a full-cmdline image and install dhcp-client as the default DHCP client.
2. Configure a static IP for eth0 in /etc/networking/interfaces and reboot.
$ ifconfig eth0
eth0 inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
$ ifdown eth0
3. Modify /etc/networking/interfaces to configure a dynamic IP for eth0
$ ifup eth0
$ ifconfig eth0
eth0 inet addr:192.168.1.2 Bcast:192.168.1.255 Mask:255.255.255.0
You could see the eth0 still has a static IP. But actually it also has a
dynamic IP:
$ ip addr show eth0
eth0:
inet 192.168.1.2/24 brd 192.168.1.255 scope global eth0
inet 128.224.162.173/23 brd 128.224.163.255 scope global eth0
The root cause is the ifdown invokes "ifconfig" to down the eth0 but
doesn't remove its IP. The dhclient would invoke "ip" to configure the
interface. It can not remove an IP from down interface with "ip addr
flush" and "ip addr add" command can set multiple IPs on one interface.
To fix this issue, we should use the "ip" command to implement
ifup/ifdown, rather than using the older "ifconfig". It will flush the
IP before down the interface.
(From OE-Core rev: 4304ed013a015bfb6f054017cb273578b874b4c2)
Signed-off-by: Yi Zhao <yi.zhao@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Poky
Poky is an integration of various components to form a complete prepackaged build system and development environment. It features support for building customised embedded device style images. There are reference demo images featuring a X11/Matchbox/GTK themed UI called Sato. The system supports cross-architecture application development using QEMU emulation and a standalone toolchain and SDK with IDE integration.
Additional information on the specifics of hardware that Poky supports is available in README.hardware. Further hardware support can easily be added in the form of layers which extend the systems capabilities in a modular way.
As an integration layer Poky consists of several upstream projects such as BitBake, OpenEmbedded-Core, Yocto documentation and various sources of information e.g. for the hardware support. Poky is in turn a component of the Yocto Project.
The Yocto Project has extensive documentation about the system including a reference manual which can be found at: http://yoctoproject.org/documentation
OpenEmbedded-Core is a layer containing the core metadata for current versions of OpenEmbedded. It is distro-less (can build a functional image with DISTRO = "nodistro") and contains only emulated machine support.
For information about OpenEmbedded, see the OpenEmbedded website: http://www.openembedded.org/
Where to Send Patches
As Poky is an integration repository (built using a tool called combo-layer), patches against the various components should be sent to their respective upstreams:
bitbake: Git repository: http://git.openembedded.org/bitbake/ Mailing list: bitbake-devel@lists.openembedded.org
documentation: Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/yocto-docs/ Mailing list: yocto@yoctoproject.org
meta-poky, meta-yocto-bsp: Git repository: http://git.yoctoproject.org/cgit/cgit.cgi/meta-yocto(-bsp) Mailing list: poky@yoctoproject.org
Everything else should be sent to the OpenEmbedded Core mailing list. If in doubt, check the oe-core git repository for the content you intend to modify. Before sending, be sure the patches apply cleanly to the current oe-core git repository.
Git repository: http://git.openembedded.org/openembedded-core/
Mailing list: openembedded-core@lists.openembedded.org
Note: The scripts directory should be treated with extra care as it is a mix of oe-core and poky-specific files.