Commit Graph
10 Commits
Author SHA1 Message Date
Ian Campbell f87945a8d1 hotplug: network-bridge: fix for interfaces with no gateway
This comes from an old Debian bug report
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=588477 which refers to
http://lists.xen.org/archives/html/xen-users/2010-06/msg00420.html.

Although we no longer have a trap in _claim_lock as described (this was removed
in 25590:bb250383a4f5 "hotplug/Linux: use flock based locking") and the use of
network-* scripts is discouraged (in favour of using distro provided
mechanisms) the general principal that relying on the semantics of /bin/sh's &&
is unwise seems sound.

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Committed-by: Ian Campbell <ian.campbell@citrix.com>
2012-07-25 17:39:16 +01:00
Ian Campbell 6162c530ff tools/hotplug/Linux: only apply dummy MAC address to virtual devices.
Avoid applying to the bridge and physical network device.

This should un-break dom0 networking in the old xend-creates-bridge
setup (problem introduced in 22493:937488219719).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
2011-01-04 15:26:02 +00:00
Keir Fraser edf9a6a284 xend: Do not mess with bridge if admin has set one up already
Previously, the default "network-script",
/etc/xen/scripts/network-bridge, would attempt to do its horrid work
even if you had already set everything up in /etc/network/interfaces.

Setting up your bridge in /etc/network/interfaces is:
 * easy
 * required for libxl since libxl never does it for you
 * not a fragile piece of lunacy
 * properly documented
 * the way everyone would expect it to work

In this small patch we make it so that the default config for xend
doesn't mess about on startup if you already have a bridge, and
doesn't mess about on shutdown unless your first-named bridge (eth0 or
xenbr0, normally) doesn't also have a physical interface named
p<whatever> (peth0 or pxenbr0) enslaved to it.  The latter test is not
ideal but will hopefully do from now until the time xend finally dies.

We also fix the "documentation" - ie, the comments in the default
xend-config.sxp - to correspond to reality.

Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
2010-06-15 11:36:27 +01:00
Keir Fraser f770264fe1 Calling awk and not gawk in the Xen scripts
I noticed that 2 scripts in Xen 4.0.0 are calling "gawk". Normally, in
most distributions, gawk is considered a specific version of awk.
Calling "gawk" and not "awk" generally means that you need
specificities of the "g" version of awk, as opposed to "mawk" which is
another implementation of the same tool.

So, unless I misread the scripts, Xen doesn't need to use gawk but
just any implementation of awk, and the attached patch can safely be
applied.

If I am wrong (which I don't think I am at the first look) and that
there's a reason why gawk is used and not awk, then IMHO, the toplevel
README should mention it in the prerequisites.

From: Thomas Goirand <thomas@goirand.fr>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
2010-04-19 09:00:30 +01:00
Keir Fraser f1ad4b4ad7 hotplug: Avoid race condition when creating or destroying network bridges
I saw the following message when I created or destroyed two bridges by
using network-bridge script at same time.  Of course names of the
bridges are different.  But, a temporal name "tmpbridge" is used by
the script to create or destroy the bridges.  I think that the message
was shown by "tmpbridge".

  SIOCSIFNAME: File exists

This patch avoids race condition when creating or destroying the
bridges.

Signed-off-by: Masaki Kanno <kanno.masaki@jp.fujitsu.com>
2010-03-15 13:16:35 +00:00
Keir Fraser a2b4af7d77 Get rid of hardcoded pathes for stubdom and hotplug scripts
- Have the buid system generate a file which exports the install paths
   for the hotplug scripts and stubdom / stubdom-dm
- Move file generation code from tools/python/Makefile into a gmake
   macro
  in Config.mk to avoid maintenance of three duplicates each with its
   own
  tweaks and bugs
- Export gmake variables into ioemu as shell variables
  for upcoming ioemu patches
- Do above as a gmake macro to avoid maintenance of several duplicates
- Adjust hotplug scripts to find the right xen binaries from the
  install directory
- Adjust stubdom-dm to use the install directories

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
2009-06-23 17:25:51 +01:00
Keir Fraser d1abeffc81 Fix network-bridge ifup problem when bridge has no IP address.
When we want to setup a bridge without a ip address, function
do_ifup will not activate the bridge.

We should make the bridge active, then vif-bridge can work on the
bridge.

Signed-off-by: Zhigang Wang <zhigang.x.wang@oracle.com>
2009-06-23 11:22:08 +01:00
Keir Fraser 744ba6479a network-bridge: Fix for bonding
If ${netdev} is bonding, brctl addif ${bridge} ${pdev} fails:
  can't add ${pdev} to bridge ${bridge}: Invalid argument
Because ${pdev} has no slaves at this point.=20
# Notice that ifdown ${netdev} clears slaves of ${netdev}.

This patch restores slaves before add_to_bridge2 ${bridge} ${pdev}.

Signed-off-by: KUWAMURA Shin'ya <kuwa@jp.fujitsu.com>
2009-04-22 11:26:37 +01:00
Keir Fraser 0c29f97df0 network-bridge: Fix do_ifup in the case of ${bridge} != ${netdev}
On RHEL5.2, ifup ${bridge} fails if ${bridge} != ${netdev},
because RHEL5.2's ifup ${bridge} runs the following sequence:

1. Search CONFIG that has the same mac address of ${bridge}.=20
   ifcfg-${netdev} is found.
2. Run "ip link set dev ${netdev} up".
   # ${bridge} is expected.
3. Output "Failed to bring up ${netdev}."
   Because ${netdev} does not exist.

Thus, do_ifup() should not use ifup if ${bridge} != ${netdev}.

Signed-off-by: KUWAMURA Shin'ya <kuwa@jp.fujitsu.com>
2009-04-02 11:48:10 +01:00
Keir Fraser 57bcfa11b1 tools/hotplug: Separate OS-specific scripts.
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
2008-11-04 12:13:42 +00:00