debdiff from the fix in Wily
** Changed in: ifenslave-2.6 (Ubuntu Trusty)
Assignee: (unassigned) => eric.desrochers (eric-desrochers-z)
** Changed in: ifenslave-2.6 (Ubuntu Trusty)
Status: Confirmed => In Progress
** Description changed:
+ [SRU justification]
+
+ [Impact]
+
+ Without this patch, trying to add a bond when this one is already
+ defined leads to the following error :
+
+ Example :
+
+ # ifenslave bond0 eth1 eth2
+ sh: echo: I/O error
+ eth1: could not add interface
+
+ [Test Case]
+
+ For info, the ambiguous message only appears when using ifenslave on a
+ bond that is already configured :
+
+ # ifconfig eth1 up
+ # ifconfig eth2 up
+ # ifconfig bond0 up
+ # ifenslave bond0 eth1 eth2 <<<< No error on the first execution
+ # ifenslave bond0 eth1 eth2
+ sh: echo: I/O error
+ eth1: could not add interface
+
+ [Regression Potential]
+
+ None expected as the same commit is already in use in the ifenslave
+ package for Wily and in the upstream debian package.
+
+ [Original description of the problem]
+
adding an interface to a bonding interface can result in the error
message "sh: echo: I/O error" which is highly ambiguous (did the I/O
error occur in sh, echo or is it an I/O error realted to the
command/driver? - at least change this to "I/O error occured" which is
still not helpful ("I/O occured in the kernel driver, please make sure
it supports XY, check with <Z>" would be nice), but at least not
confusing.
reproduction:
/etc/wpa_supplicant/wpa_supplicant.conf
<code>
network={
- ssid="assid"
- key_mgmt=WPA-EAP
- eap=TTLS
- proto=WPA RSN
- identity="anident...@adomain.com"
- anonymous_identity="anonym...@adomain.de"
- ca_cert="/etc/wpa_supplicant/deutsche-telekom-root-ca-2.crt"
- phase2="auth=PAP"
+ ssid="assid"
+ key_mgmt=WPA-EAP
+ eap=TTLS
+ proto=WPA RSN
+ identity="anident...@adomain.com"
+ anonymous_identity="anonym...@adomain.de"
+ ca_cert="/etc/wpa_supplicant/deutsche-telekom-root-ca-2.crt"
+ phase2="auth=PAP"
}
</code>
/etc/network/interfaces
<code>
iface main inet dhcp
- wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
+ wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
iface bond0 inet manual
- down ifenslave -d bond0 wlan0 wlan1
- bond-mode active-backup
- bond-miimon 100
- bond-slaves wlan0 wlan1
+ down ifenslave -d bond0 wlan0 wlan1
+ bond-mode active-backup
+ bond-miimon 100
+ bond-slaves wlan0 wlan1
allow-bond0 wlan0
iface wlan0 inet manual
- wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
- bond-master bond0
+ wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
+ bond-master bond0
allow-bond0 wlan1
iface wlan1 inet manual
- wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
- bond-master bond0
+ wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
+ bond-master bond0
iface eth1 inet dhcp
</code>
my commands
<code>
sudo modprobe bonding
sudo ifup wlan0
sudo ifup wlan1
sudo ifconfig bond0 # no DHCP example, so I've not idea how to get this
running :( just providing a way to reproduce the error message (which should in
no case be shown with its current content)
sudo ifenslave bond0 wlan0 wlan1
</code>
I'm not requesting support here, just to fix the bug which should make
the former unnecessary anyway :)
** Patch added: "fix_c4ce52.debdiff"
https://bugs.launchpad.net/ubuntu/+source/ifenslave-2.6/+bug/1326854/+attachment/4438404/+files/fix_c4ce52.debdiff
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https://bugs.launchpad.net/bugs/1326854
Title:
ambiguous error message "sh: echo: I/O error"
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