[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

removing sts tag, as this is still marked new for vlan in debian; any
vlan delta to debian should be handled elsewhere and is more than this
bug's patches.

** Tags removed: sts

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

** Changed in: ifupdown (Ubuntu)
   Status: In Progress => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package ifupdown - 0.7.47.2ubuntu4.5

---
ifupdown (0.7.47.2ubuntu4.5) trusty; urgency=medium

  * We are not even reading the contents of the per-interface state files
when running ifquery, so there is no need to lock them. Not locking
will allow ifquery to be called recursively from ifup and ifdown.
(LP: #1701023)

 -- Dan Streetman   Fri, 27 Apr 2018 09:03:18
-0400

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3ubuntu10.6

---
vlan (1.9-3ubuntu10.6) trusty; urgency=medium

  * Revert change for lp1573272; instead fix by redesigning when vlan
interfaces are created; after raw-device ifup, not during raw-device
udev processing. (LP: #1701023)

 -- Dan Streetman   Thu, 19 Apr 2018 18:10:17
-0400

** Changed in: ifupdown (Ubuntu Trusty)
   Status: Fix Committed => Fix Released

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu1.16.04.5

---
vlan (1.9-3.2ubuntu1.16.04.5) xenial; urgency=medium

  * Revert change for lp1573272; instead fix by redesigning when vlan
interfaces are created; after raw-device ifup, not during raw-device
udev processing. (LP: #1701023)

 -- Dan Streetman   Thu, 19 Apr 2018 18:10:17
-0400

** Changed in: ifupdown (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package ifupdown - 0.8.10ubuntu1.4

---
ifupdown (0.8.10ubuntu1.4) xenial; urgency=medium

  * We are not even reading the contents of the per-interface state files
when running ifquery, so there is no need to lock them. Not locking
will allow ifquery to be called recursively from ifup and ifdown.
(LP: #1701023)

 -- Dan Streetman   Fri, 27 Apr 2018 08:56:12
-0400

** Changed in: vlan (Ubuntu Trusty)
   Status: Fix Committed => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu5.17.10.1

---
vlan (1.9-3.2ubuntu5.17.10.1) artful; urgency=medium

  * Revert change for lp1573272; instead fix by redesigning when vlan
interfaces are created; after raw-device ifup, not during raw-device
udev processing. (LP: #1701023)

 -- Dan Streetman   Thu, 19 Apr 2018 18:10:17
-0400

** Changed in: vlan (Ubuntu Artful)
   Status: Fix Committed => Fix Released

** Changed in: ifupdown (Ubuntu Artful)
   Status: Fix Committed => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package ifupdown - 0.8.16ubuntu2.1

---
ifupdown (0.8.16ubuntu2.1) artful; urgency=medium

  * We are not even reading the contents of the per-interface state files
when running ifquery, so there is no need to lock them. Not locking
will allow ifquery to be called recursively from ifup and ifdown.
(LP: #1701023)

 -- Dan Streetman   Fri, 27 Apr 2018 08:53:27
-0400

** Changed in: vlan (Ubuntu Xenial)
   Status: Fix Committed => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package ifupdown - 0.8.17ubuntu1.1

---
ifupdown (0.8.17ubuntu1.1) bionic; urgency=medium

  * We are not even reading the contents of the per-interface state files
when running ifquery, so there is no need to lock them. Not locking
will allow ifquery to be called recursively from ifup and ifdown.
(LP: #1701023)

 -- Dan Streetman   Fri, 27 Apr 2018 08:00:07
-0400

** Changed in: ifupdown (Ubuntu Bionic)
   Status: Fix Committed => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Łukasz Zemczak]

I think this aged long enough in -proposed - releasing.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu6

---
vlan (1.9-3.2ubuntu6) bionic; urgency=medium

  * Revert change for lp1573272; instead fix by redesigning when vlan
interfaces are created; after raw-device ifup, not during raw-device
udev processing. (LP: #1701023)

 -- Dan Streetman   Thu, 19 Apr 2018 18:10:17
-0400

** Changed in: vlan (Ubuntu Bionic)
   Status: Fix Committed => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

trusty:

root@lp1701023:~# dpkg -l | grep ifupdown
ii  ifupdown 0.7.47.2ubuntu4.4  
amd64high level tools to configure network interfaces
root@lp1701023:~# dpkg -l | grep vlan
ii  vlan 1.9-3ubuntu10.5
amd64user mode programs to enable VLANs on your ethernet devices
root@lp1701023:~# 

I verified comment 19 tests all passed (ifup -a, reboot, hotplug) as
expected for these pkg versions.

I also verified with the e/n/i config from this bug's description does
cause the hang failure as expected (tested with ifup -a).


root@lp1701023:/etc/network/interfaces.d# dpkg -l | grep ifupdown
ii  ifupdown 0.7.47.2ubuntu4.5  
amd64high level tools to configure network interfaces
root@lp1701023:/etc/network/interfaces.d# dpkg -l | grep vlan
ii  vlan 1.9-3ubuntu10.6
amd64user mode programs to enable VLANs on your ethernet devices


With the updated -proposed pkgs, I verified it passes all comment 19 tests 
(ifup -a, reboot, hotplug).

I also verified that the e/n/i config from this bug's description does
not hang, and properly brings up all configured interfaces with the
right config (for ifup -a, reboot, and hotplug).

** Tags removed: verification-needed verification-needed-trusty
** Tags added: verification-done verification-done-trusty

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

xenial:

root@lp1701023-x:/etc/network/interfaces.d# dpkg -l |grep ifupdown
ii  ifupdown 0.8.10ubuntu1.4
amd64high level tools to configure network interfaces
root@lp1701023-x:/etc/network/interfaces.d# dpkg -l |grep vlan
ii  vlan 1.9-3.2ubuntu1.16.04.5 
amd64user mode programs to enable VLANs on your ethernet devices

all comment 19 tests work.

** Tags removed: verification-needed-xenial
** Tags added: verification-done-xenial

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

tested on artful with:

root@lp1701023-a:~# dpkg -l | grep ifupdown
ii  ifupdown   0.8.16ubuntu2.1  
amd64high level tools to configure network interfaces
root@lp1701023-a:~# dpkg -l | grep vlan
ii  vlan   1.9-3.2ubuntu5.17.10.1   
amd64user mode programs to enable VLANs on your ethernet 
devices


all tests from comment 19 work.  as the previous versions also all worked, no 
need to test them again.

** Tags removed: verification-needed-artful
** Tags added: verification-done-artful

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

tested bionic per comment 19 with:

root@lp1701023-b:~# dpkg -l | grep ifupdown
ii  ifupdown 0.8.17ubuntu1 amd64
high level tools to configure network interfaces
root@lp1701023-b:~# dpkg -l | grep vlan
ii  vlan 1.9-3.2ubuntu5amd64
user mode programs to enable VLANs on your ethernet devices

and with:

root@lp1701023-b:~# dpkg -l | grep ifupdown
ii  ifupdown 0.8.17ubuntu1.1   amd64
high level tools to configure network interfaces
root@lp1701023-b:~# dpkg -l | grep vlan
ii  vlan 1.9-3.2ubuntu6amd64
user mode programs to enable VLANs on your ethernet devices


all tests from comment 19 do work with both package versions.

** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

This bug was fixed in the package vlan - 1.9-3.2ubuntu6

---
vlan (1.9-3.2ubuntu6) bionic; urgency=medium

  * Revert change for lp1573272; instead fix by redesigning when vlan
interfaces are created; after raw-device ifup, not during raw-device
udev processing. (LP: #1701023)

 -- Dan Streetman   Thu, 19 Apr 2018 18:10:17
-0400

** Changed in: vlan (Ubuntu)
   Status: In Progress => Fix Released

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

I sent an email to ubuntu-server list requesting anyone with vlan
ifupdwon config to give these -proposed pkgs a test.

I'll also perform verification for them when I have a chance.

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Łukasz Zemczak]

Hello Sven, or anyone else affected,

Accepted ifupdown into trusty-proposed. The package will build now and
be available at
https://launchpad.net/ubuntu/+source/ifupdown/0.7.47.2ubuntu4.5 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-trusty to verification-done-trusty. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-trusty. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: ifupdown (Ubuntu Trusty)
   Status: In Progress => Fix Committed

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Łukasz Zemczak]

Hello Sven, or anyone else affected,

Accepted ifupdown into artful-proposed. The package will build now and
be available at
https://launchpad.net/ubuntu/+source/ifupdown/0.8.16ubuntu2.1 in a few
hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-artful to verification-done-artful. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-artful. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: ifupdown (Ubuntu Artful)
   Status: In Progress => Fix Committed

** Changed in: vlan (Ubuntu Xenial)
   Status: In Progress => Fix Committed

** Tags added: verification-needed-xenial

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Łukasz Zemczak]

Hello Sven, or anyone else affected,

Accepted vlan into artful-proposed. The package will build now and be
available at
https://launchpad.net/ubuntu/+source/vlan/1.9-3.2ubuntu5.17.10.1 in a
few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-artful to verification-done-artful. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-artful. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: vlan (Ubuntu Artful)
   Status: In Progress => Fix Committed

** Tags added: verification-needed-artful

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

>  I would feel better if a wider call-for-testing could be done on these 
> packages
> in bionic-proposed

yes i agree; the mailing lists that comes to mind is ubuntu-server, do
you have any other ML suggestion?

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Łukasz Zemczak]

Seeing that the previous change caused regressions, I would feel better
if a wider call-for-testing could be done on these packages in bionic-
proposed, performing tests on various different configurations.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Łukasz Zemczak]

Hello Sven, or anyone else affected,

Accepted vlan into bionic-proposed. The package will build now and be
available at https://launchpad.net/ubuntu/+source/vlan/1.9-3.2ubuntu6 in
a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation on how
to enable and use -proposed.Your feedback will aid us getting this
update out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested and change the tag from
verification-needed-bionic to verification-done-bionic. If it does not
fix the bug for you, please add a comment stating that, and change the
tag to verification-failed-bionic. In either case, without details of
your testing we will not be able to proceed.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

** Changed in: vlan (Ubuntu Bionic)
   Status: In Progress => Fix Committed

** Tags added: verification-needed verification-needed-bionic

** Changed in: ifupdown (Ubuntu Bionic)
   Status: In Progress => Fix Committed

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

> could we get the SRU template information included in this bug?

doh. sorry, been awfully busy lately.  added.

** Description changed:

+ [impact]
+ 
+ in bug 1573272, the vlan pkg was changed to perform a full ifup inside
+ its if-pre-up.d/vlan script.  This allowed correct ordering of ifup for
+ a vlan and its raw-device, as previously there was a race condition
+ between them (see that bug for details).
+ 
+ However, this causes hangs during ifup with certain specific configs.
+ The reasons are given starting in comment 13.
+ 
+ The result is a regression for those using the specific ifupdown
+ configs; when they try to reboot and/or ifup -a, it will hang trying to
+ bring up their network, preventing boot from finishing (or hanging
+ before the network is fully configured).
+ 
+ [test case]
+ 
+ upgrade to the latest vlan package and configure the system with an
+ affected ifupdown config, then reboot.  The reboot will hang while
+ trying to bring the network up.
+ 
+ see the original description below for an example ifupdown config to
+ reproduce this, although there are other possible configs that will/may
+ trigger this regression.
+ 
+ [regression potential]
+ 
+ The fix for this moves the creation of the vlan(s) corresponding to a
+ physical raw-device 'hotplug' event out of the udev processing path for
+ the raw-device, and into an ifup post script for the raw-device ifup.
+ If this is not done correctly, then any interfaces that are hotplugged,
+ and have vlans configured on them, may fail to correctly
+ create/configure their vlan(s).
+ 
+ This change does remove the direct call to ifup from the if-pre-up.d (or
+ if-up.d) scripts, so there should not be any regression potential for
+ more ifup deadlocks.
+ 
+ [other info]
+ 
+ this required both ifupdown and vlan to be patched.  vlan was patched to
+ remove the problematic call to ifup from the vlan pre-up script, and add
+ a call to create the vlan interface(s) from a new post-up script, as
+ well as adding a parameter to vlan-network-interface script to handle
+ the call from udev itself differently than a call from elsewhere (such
+ as the if-up.d/vlan script).  this works for bootup and ifup/ifup -a,
+ but fails for device hotplug because of a bug in ifupdown that prevents
+ calling ifquery from an ifup script; that has been patched upstream
+ already, and is the only ifupdown change needed here.
+ 
+ 
+ [original description]
+ 
  When upgrading from version 1.9-3ubuntu10.1, a previously working
  machine can't successfully reboot completely.
  
  ifup is hanging indefinitely, with this process structure (from "pstree
  -a 1299"):
  
  ifup,1299 -a
-   └─run-parts,1501 /etc/network/if-pre-up.d
-   └─bridge,1502 /etc/network/if-pre-up.d/bridge
-   └─bridge,1508 /etc/network/if-pre-up.d/bridge
-   └─vlan,1511 /etc/network/if-pre-up.d/vlan
-   └─ifup,1532 eth0
- 
+   └─run-parts,1501 /etc/network/if-pre-up.d
+   └─bridge,1502 /etc/network/if-pre-up.d/bridge
+   └─bridge,1508 /etc/network/if-pre-up.d/bridge
+   └─vlan,1511 /etc/network/if-pre-up.d/vlan
+   └─ifup,1532 eth0
  
  
  auto lo
  iface lo inet loopback
  
  auto eth0
  iface eth0 inet static
-   address 192.168.10.65
-   netmask 255.255.255.192
-   gateway 192.168.10.66
+   address 192.168.10.65
+   netmask 255.255.255.192
+   gateway 192.168.10.66
  
  auto eth0.11
-   address 192.168.11.1
-   netmask 255.255.255.0
+   address 192.168.11.1
+   netmask 255.255.255.0
  
  auto br1134
  iface br1134 inet manual
-   bridge_ports eth0.1134
-   bridge_stp off
-   bridge_fd 0
+   bridge_ports eth0.1134
+   bridge_stp off
+   bridge_fd 0
  
  
  The underlying interface eth0.1134 is not explicitly defined, but was
  previously auto-created during "ifup -a" execution. This apparently
  fails now.
  
  Reverting back to the 10.1 version re-establishes old behavior.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Łukasz Zemczak]

@ddstreet - could we get the SRU template information included in this
bug?

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

> Neither issue is fixed by the downgrade

ok, thanks, so those are ifupdown issues unrelated to this vlan
regression - please feel free to open bug(s) for them.  I'll start an
sru for this.

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Tom Verdaat]

Neither issue is fixed by the downgrade. As said, neither seems to have
to do with vlan but with ifupdown.

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

> We migrated from separate files in /etc/networking/interfaces.d to just 
> declaring
> everything in the single /etc/networking/interfaces file. This overcomes a 
> lot of
> issues with regards to bringing interfaces up in the proper order and "ifup 
> -a"
> now works perfectly again

great.

> (a) to have bonds come up correctly you absolutely have to define slaves 
> before the
> bond master and the primary slave before secondary slaves in the 
> configuration file,
> and (b) to have a vlan come up correctly define its raw device before the 
> vlan device.

yep, I'm pretty sure this is how ifupdown has always behaved.  However,
please do feel free to open a bug, as it should work better and not
require specific ordering like this (I just can't promise it will get
fixed soon).  Also, if it ever worked in the past that you know of, it's
more likely to be fixed, so do note that if you open a new bug.

> bringing bonds up correctly at boot does not

it should - can you please downgrade to the vlan version
1.9-3.2ubuntu1.16.04.1 (assuming you're on Xenial), and if it still
fails there, please open a new bug.  If it doesn't fail there, then let
me know in this bug, as it's a regression from my changes.

You can download the older vlan package from here:
https://launchpad.net/ubuntu/+source/vlan/1.9-3.2ubuntu1.16.04.1

click on the arch you're using under 'Builds' to get to the arch-specific page 
with binary deb links, e.g. for amd64:
http://launchpadlibrarian.net/289303685/vlan_1.9-3.2ubuntu1.16.04.1_amd64.deb

< There is a problem when running a bond on top of vlans

also please test this with above-mentioned vlan package version, and
open a new bug if it fails there as well, or post here if it works with
that older vlan version.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Tom Verdaat]

Hi @ddstreet. Completely understand your need to limit the scope of this
bug. Just shared our findings, but feel free to ignore the stuff in #28
under item 2. We did a lot of extensive testing over the weekend with
the latest version of your PPA package and here are our main findings:

1) We migrated from separate files in /etc/networking/interfaces.d to
just declaring everything in the single /etc/networking/interfaces file.
This overcomes a lot of issues with regards to bringing interfaces up in
the proper order and "ifup -a" now works perfectly again. Some lessons
learned for future reference: (a) to have bonds come up correctly you
absolutely have to define slaves before the bond master and the primary
slave before secondary slaves in the configuration file, and (b) to have
a vlan come up correctly define its raw device before the vlan device.

2) Even though "ifup -a" now works again, bringing bonds up correctly at
boot does not. Pretty sure this has to do with the raw interfaces being
detected by the kernel and brought up by systemd in a different order at
boot. As said under (1) the order really really matters. Bringing up a
secondary slave before the primary slave seems to break the bond (looks
like due to using the wrong MAC address) and it looks like this is what
sometimes happens at boot. Our workaround mentioned in #28 under (3)
mitigates this, but it's not very elegant at all.

3) There is a problem when running a bond on top of vlans. Running ifup
with verbose enabled shows run-parts being executed in (what seems like)
alphabetical order, but to enslave a vlan interface, run-part
/etc/network/if-pre-up.d/vlan should be executed before run-part
/etc/network/if-pre-up.d/ifenslave. For now we added "pre-up export
IFACE= IF_VLAN_RAW_DEVICE=; /etc/network/if-pre-
up.d/vlan" to all vlan slaves as a workaround, but it would be better to
fix this in the ifupdown package itself.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

I updated the ifupdown pkg builds in my test ppa using the upstream
(debian) patch, which is a variation of my previous patch.  Anyone
affected by this regression please test with the latest ifupdown and
vlan pkgs from my ppa.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

> Unfortunately it turns out this change does not fix the issue of interfaces 
> not
> coming up correctly for a bond with a (static) network configuration

Please keep in mind this bug is *specifically* about the regression
caused by the change from bug 1573272, as described in this bug
description.  My test criteria for the patches for this bug are listed
in comment 17 and comment 18.  This bug is *not* about any issue that
has never worked.  If your configuration worked using (assuming Xenial)
vlan version 1.9-3.2ubuntu1.16.04.1, but does not work now, then please
let me know the details; however if your config doesn't work with
(assuming Xenial) vlan version 1.9-3.2ubuntu1.16.04.1 then it's
unrelated to this bug and you should open a new bug (or un-dup bug
1759573, if appropriate).

> Executing "ifdown -a; ifup -a" shows that ifupdown tries to bring up
the bond BEFORE the slaves

what's your EXACT e/n/i configuration.  single file or multiple files?
ifup -a brings them up in order that they are listed in e/n/i

> bonds relying on slaves having "bond-master"...

this is nothing new and has nothing to do with this bug.  If this is an
issue for you, please open a new bug.  I agree with you in principle
that this should be better, but that's no guarantee it will actually get
fixed.

> bringing a specific interface up automatically brings up it's child
vlans...

this also is nothing new.  this is how things have worked for a long
time, and it has nothing to do with this bug.  If this is a problem for
you, please open a new bug and discuss there.  Note I do not think this
will change without some significant justification (provided in a new
bug, not here please) for why it's a problem.

> a vlan running on top of a bond cannot be brought up directly...

also...nothing new.  unrelated to this bug.  please open a new bug if
this is a problem for you.  Also, doubt this will change without
specific justification (not provided here, please) for why this is a
problem.

I can understand your frustration with the delicate nature of ifupdown;
its configuration is more 'delicate' than most users would like, and
calling ifup directly for specific interfaces doesn't always work the
way you would like, for more complicated configurations.  However, it's
been like this, and for the most part you just have to learn its
limitations and live with them.  Opening bugs for ifupdown limitations
is fine, but some things just won't be changed.

In the future, netplan and/or systemd-networkd take over interface
configuration, and I think you may find them much more reliable and
robust, although maybe more complicated to configure and/or less
"flexible" than ifupdown in some ways.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Tom Verdaat]

We've been doing a lot more testing and debugging and I'd like to share
our findings:

1) Unfortunately it turns out this change does not fix the issue of interfaces 
not coming up correctly for a bond with a (static) network configuration. The 
race condition seems to be removed so at least there are no more hangs between 
bonds and their vlan children. All the interfaces also say they are UP both 
when running ifup and after reboot. However:
- Running "ifup " does bring up the bond (and its vlans) in a 
working state.
- Running "ifup -a" or rebooting don't actually work, causing "network not 
available" errors and "Destination Host Unreachable" when pinging other 
machines. Executing "ifdown -a; ifup -a" shows that ifupdown tries to bring up 
the bond BEFORE the slaves in stead of the other way around. Even though after 
the 60s timeout the bond and it's slaves say they are UP, they don't actually 
function.
- We're not seeing any issues with bonds that do not have a network 
configuration of their own

2) The networking script stack / concept seems fundamentally flawed in
three areas:

2.A) bonds relying on slaves having "bond-master" and being started by
bringing up the slaves, but not supporting the master having "bond-
slaves" and being able to start a bond by just bringing up the bond
directly.

2.B) bringing a specific interface up automatically brings up it's child
vlans. This does not make a lot of sense. The other way around does -
e.g. in order to bring up a vlan we need to bring up it's raw device -
but why would the ifupdown scripts assume that I want to bring up all of
it's vlans when I bring up an interface that (also) serves as a raw
device? In that case I would probably run "ifup -a"!

2.C) a vlan running on top of a bond cannot be brought up directly due to 
/sys/class/net// not existing. This results in the following:
>  # ifup bo-adm.2
>  Set name-type for VLAN subsystem. Should be visible in /proc/net/vlan/config
>  cat: /sys/class/net/bo-adm/mtu: No such file or directory
>  Device "bo-adm" does not exist.
>  bo-adm does not exist, unable to create bo-adm.2
>  run-parts: /etc/network/if-pre-up.d/vlan exited with return code 1
>  Failed to bring up bo-adm.2.

3) Our new workaround for boot has become this very intrusive systemd service:
> [Unit]
> Wants=network-online.target
> After=network-online.target
> 
> [Install]
> WantedBy=multi-user.target
> 
> [Service]
> Type=oneshot
> ExecStartPre=/sbin/ifdown bo-adm
> ExecStart=/sbin/ifup enp0s3
> ExecStart=/sbin/ifup enp0s10
> ExecStop=/sbin/ifdown bo-adm
> RemainAfterExit=yes
> TimeoutStartSec=5min

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

Debian's included a variation of my patch to ifupdown, so I'll update my
ppa to use that patch instead and do some testing, then start sru'ing
both ifupdown and vlan.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Bug Watch Updater]

** Changed in: ifupdown (Debian)
   Status: New => Fix Released

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

> @ddstreet tested with the latest version of ifupdown and vlan from your PPA 
> with
> my 4 testscenario's and can confirm it works as expected. Interfaces come up
> correctly both when doing an "ifup -a" and during boot.

Excellent, thanks.

> One small thing I've noticed is a variation in the number of "Set name-type 
> for
> VLAN subsystem. Should be visible in /proc/net/vlan/config" messages in the
> ifup output depending on the different scenario, even though the number of
> vlans is the same in all 4 tests

That's because in your config tests with vlans on bonds, your call to
ifup -a doesn't actually process the bond or its vlans.  Your ifup -a
starts processing one of the bond slaves, and that causes the bond
interface to by created.  The bond creation is detected by udev, and
udev tells systemd, and systemd then invokes ifup directly on the bond
interface.  By the time your ifup -a has gotten to trying to bring up
the bond (or its vlans), they are already up because of udev detection
which invokes the 'hotplug' ifup that logs to systemd logs, not your
stdout.

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Tom Verdaat]

@ddstreet tested with the latest version of ifupdown and vlan from your
PPA with my 4 testscenario's and can confirm it works as expected.
Interfaces come up correctly both when doing an "ifup -a" and during
boot.

One small thing I've noticed is a variation in the number of "Set name-
type for VLAN subsystem. Should be visible in /proc/net/vlan/config"
messages in the ifup output depending on the different scenario, even
though the number of vlans is the same in all 4 tests. With 2 vlans, the
2 scenario's with bonding generate 1 message, the ones without bonding
generate 4. It doesn't hurt, just something I noticed. Please check the
attached log for more details on my 4 tests.

** Attachment added: "Test output for 4 different scenario's"
   
https://bugs.launchpad.net/ubuntu/+source/vlan/+bug/1701023/+attachment/5124886/+files/vlan-tests.txt

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Bug Watch Updater]

** Changed in: vlan (Debian)
   Status: Unknown => New

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Bug Watch Updater]

** Changed in: ifupdown (Debian)
   Status: Unknown => New

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

** Bug watch added: Debian Bug tracker #896433
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896433

** Also affects: ifupdown (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896433
   Importance: Unknown
   Status: Unknown

** Bug watch added: Debian Bug tracker #896434
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896434

** Also affects: vlan (Debian) via
   https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=896434
   Importance: Unknown
   Status: Unknown

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

Test pkgs for both ifupdown and vlan available in this ppa:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1701023

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

** Also affects: ifupdown (Ubuntu)
   Importance: Undecided
   Status: New

** Changed in: ifupdown (Ubuntu Trusty)
   Importance: Undecided => Medium

** Changed in: ifupdown (Ubuntu Trusty)
   Status: New => In Progress

** Changed in: ifupdown (Ubuntu Trusty)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: ifupdown (Ubuntu Xenial)
   Importance: Undecided => Medium

** Changed in: ifupdown (Ubuntu Xenial)
   Status: New => In Progress

** Changed in: ifupdown (Ubuntu Xenial)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: ifupdown (Ubuntu Artful)
   Importance: Undecided => Medium

** Changed in: ifupdown (Ubuntu Artful)
   Status: New => In Progress

** Changed in: ifupdown (Ubuntu Artful)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: ifupdown (Ubuntu Bionic)
   Importance: Undecided => Medium

** Changed in: ifupdown (Ubuntu Bionic)
   Status: New => In Progress

** Changed in: ifupdown (Ubuntu Bionic)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

Also re: testcase 3, I could only reproduce it on reboot and ifup -a; it
did not fail when i tried hotplugging the interface (modprobing its
driver).

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

@smu-u, please do let me know if you are seeing this issue in X/A/B.
Otherwise, I'll assume you only see this issue in trusty, which matches
what I found.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

For testcase 3, from this bug, I'm able to reproduce it on trusty using
vlan 1.9-3ubuntu10.5, and using the pkg from my ppa it is fixed.

I'm not able to reproduce testcase 3 in xenial or later, so there is
nothing to verify re: testcase 3 (this bug's reported error) in X/A/B.
However, my redesign should still go into those, as calling ifup from
the if-pre-up.d/vlan script is not good - there are unfortunately too
many places that call that script (not just a direct call from ifupdown,
unfortunately), and calling ifup from there will cause more problems
later.  Creating the vlan interface (if needed) in the raw-device post-
up is the correct time to do it.

I'm going to open a bug for the ifupdown ifquery 'recursive' error
described in comment 19, create a patch for that, and then start SRUing
this change.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

Test case #1 (bug 1573272), part (a) and (b) only:

I'm unable to reproduce test case #1 failure on trusty, because upstart
is used instead of systemd.  I'm not sure if that means the race
condition doesn't affect trusty, or if i'm just not able to properly
introduce a upstart delay to bond0 to easily reproduce the problem.  I
did verify that the vlan pkg from my test ppa does not cause any
regression for testcase 1(a) or 1(b) on trusty.

On Xenial, I verified vlan pkg 1.9-3.2ubuntu1.16.04.1 did fail,
1.9-3.2ubuntu1.16.04.4 did not fail, and my test pkg did not fail.  I
tested reboot (test 1a) and ifup -a (test 1b).

On Artful, I verified with 1.9-3.2ubuntu2 (failed as expected),
1.9-3.2ubuntu5 (worked as expected), and my ppa version (worked as
expected).  Again tested with reboot and ifup -a.

On Bionic, the vlan pkgs are the same as Artful; the same pkg versions
behaved the same as Artful, as expected.


For test 1(c), hotplugging the bond slave interfaces - which I used module 
rmmod/modprobe to test - my change introduces failure for all releases.  This 
is because I move the call to /lib/udev/vlan-network-interface into the if-up.d 
post-up scripts, and the ifquery call inside vlan-network-interface fails 
during that time because it claims it is a "recursive" call:

Apr 20 17:34:53 lp1701023-b sh[2588]: ifquery: recursion detected for interface 
bond0 in post-up phase
Apr 20 17:34:53 lp1701023-b sh[2588]: ifquery: recursion detected for parent 
interface bond0 in post-up phase

ifupdown seems broken in this manner; ifquery --list should not involve
any "recursion" or locking, as it is simply reading the config files and
listing all configured interfaces.  It should not need to lock any
interfaces, as it's not actually changing anything.  So, I plan to
continue with my design change and fix ifupdown as well.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

For testcase 2, from bug 1759573, I can't reproduce the reported hang
from that bug.

@tom-verdaat, can you provide simpler/clearer reproduction steps, or can you 
test with the vlan pkg from this ppa to verify it fixes the problem you're 
seeing:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1701023

Without a way for me to reproduce that reported problem, I'll skip that
testcase.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

There are 3 test cases here to verify this:

1) the original bug 1573272.  Test case is in that case's description.  Note 
this test case needs to be (using trusty version numbers):
  a) FAIL with vlan 1.9-3ubuntu10.1
  b) PASS with vlan 1.9-3ubuntu10.5 (current version)
  c) PASS with the proposed fix for this bug

2) bug 1759573, which is the regression of this bug, using bridges.
Test case is in bug 1759573 comment 8.

3) this bug, which is regression using bonds.  Test case is in the
description.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

Also, for each of those test cases, this fix needs to be tested for:

a) normal bootup
b) ifup -a
c) physical device hotplug (e.g. insmod driver, or hotplug removable nic)

all cases should bring up the configure the associated vlans correctly.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

Anyone experiencing this bug, can you please test with the vlan package from 
this test ppa:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1701023

I still need to do more testing with it as well.

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

The reason that udev calls /lib/udev/vlan-network-interface is because
of hotplugging.

During boot up, as network interfaces are detected by the kernel, they
are reported to udev, and udev passes each to vlan-network-interface.
If the vlan-network-interface script detects that a new interface is
configured in ifupdown as a 'vlan-raw-device', then it calls
/etc/network/if-pre-up.d/vlan which creates the vlan interface.

Udev also, after all other processing, calls systemd (or upstart) with
the interface, and that in turn calls ifup for the interface.  Thus,
during boot up, all physical interfaces are ifup'ed directly, and all
vlans are created and also ifup'ed manually.  After all that completes,
then systemd/upstart finally calls ifup -a to bring up any remaining
configured interfaces.

The bootup process does not require vlan interfaces to be created and
configured, as the final 'ifup -a' will create and configure them.
However, after bootup, and physical devices that are hotplugged will be
detected by udev, and passed to systemd/upstart which calls ifup for the
hotplugged interface - but, without udev calling vlan-network-interface,
the hotplugging of a physical interface will not cause any of its
associated vlan interfaces to be created or configured.

So what this means is vlan interfaces do need to be created when their
raw-device interface is detected and/or configured; however, it does not
need to (and, should not happen during) udev processing of the raw-
device interface.  That is what causes the race condition between the
raw device interface and its vlan(s), as described in bug 1573272.

Instead, an physical device's vlan interfaces should be created during
ifup of that physical device.  That way, the vlan interface's raw-device
is guaranteed to be already up and configured, but also vlan interfaces
will be created and configured when a physical device is hotplugged.

I'll investigate updating ifupdown and/or the vlan scripts to change to
this method instead of the current design.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

The reason the if-pre-up.d/vlan script was changed to call ifup for its
raw-device, was for bug 1573272, where the problem was a race condition
between the VLAN and its raw-device; if the VLAN interface was processed
through if-pre-up.d/vlan before the raw-device was fully configured,
then in some situations (such as if the raw-device is a bond device) the
raw-device is brought down during its ifup processing (usually in order
to set some device params that can't be set while the interface is up).
When the raw-device is taken down, the VLAN also goes down, and any
routing or other associated configuration is lost, such as a default
gateway.  When the raw-device comes back up, the VLAN comes up as well,
but the (e.g.) default gateway is not restored, since the VLAN interface
does not go through ifup again.

The reason there is a possibility for a race between a raw-device and
its vlan(s) is because if the /lib/udev/vlan-network-interface script.
That script is run for every interface that udev detects, and the script
checks each 'auto' device that ifquery lists as having configuration.
Any device that lists its 'vlan-raw-device' as matching the physical
interface that udev is currently processing, triggers the script to call
/etc/network/if-pre-up.d/vlan to create the vlan interface.  After udev
is finished processing the vlan's raw-device, it passes it to systemd
(or upstart) which then calls ifup for the interface.

The script's creation of the vlan interface is also, in parallel,
detected by udev, which passes it to systemd/upstart also, and ifup is
called for it.

Since the raw-device and the vlan(s) are ifup'ed in parallel, they race
with each other.  In most situations, since the raw-device has a
'headstart' in coming up, it will complete before any of the vlans, but
if the raw-device's configuration steps delays it, then the vlan(s) may
finish their ifup before it, possibly causing the above-mentioned
problem.

The addition of the 'ifup' call to if-pre-up.d/vlan script 'fixed' this
by forcing an ifup of the vlan's raw-device during (before) the creation
of the vlan interface.  That works when if-pre-up.d/vlan is being called
from the /lib/udev/vlan-network-interface script, from the udev
processing thread; however when the if-pre-up.d/vlan script is called
from elsewhere, such as during a different device's ifup, it can hang
ifupdown, as shown in this bug.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

This bug is caused in two different ways, both not directly from
ifupdown or vlan, but instead because of 'helpful' actions in the
ifenslave and bridge-utils if-pre-up scripts.


First, as reported in this bug, the bridge-utils package adds a 
if-pre-up.d/bridge ifupdown script,  and in that script it does this:

bridge_parse_ports $INTERFACES | while read i
do
  for port in $i
  do
# We attach and configure each port of the bridge
if [ "$MODE" = "start" ] && [ ! -d /sys/class/net/$IFACE/brif/$port ]; then
  if [ -x /etc/network/if-pre-up.d/vlan ]; then
env IFACE=$port /etc/network/if-pre-up.d/vlan
  fi



As pointed out in comment 2, this is done because debian decided ifupdown 
should handle the case of a bridge configuration with port(s) using vlan(s) 
that are not configured/created anywhere else in the ifupdown configuration.  
So, bridge-utils must assume it needs to create any new vlan(s) for its port(s).

Unfortunately, now that the if-pre-up.d/vlan tries to ifup its raw-
device interface (due to bug 1573272) this can lead to a hang, as shown
in this bug's description.


Second, as reported in bug 1759573, the ifenslave package adds a 
if-pre-up.d/ifenslave script, and that script does this:

# Trigger the udev bridging hook to bridge the bond if needed
if [ -x /lib/udev/bridge-network-interface ]; then
INTERFACE=$BOND_MASTER /lib/udev/bridge-network-interface
fi

# Trigger the udev bridging hook to tag the bond if needed
if [ -x /lib/udev/vlan-network-interface ]; then
INTERFACE=$BOND_MASTER /lib/udev/vlan-network-interface
fi

This is done for the reasons commented there.  Unfortunately, BOTH the
/lib/udev/bridge-network-interface as well as the /lib/udev/vlan-
network-interface call back to the if-pre-up.d/vlan script, which then
tries to ifup the vlan's raw-device, again leading to a hang.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

marking this as affecting T/X/A/B, although I need to specifically check
each.

** Also affects: vlan (Ubuntu Artful)
   Importance: Undecided
   Status: New

** Also affects: vlan (Ubuntu Bionic)
   Importance: High
 Assignee: Dan Streetman (ddstreet)
   Status: In Progress

** Also affects: vlan (Ubuntu Xenial)
   Importance: Undecided
   Status: New

** Changed in: vlan (Ubuntu Xenial)
   Status: New => In Progress

** Changed in: vlan (Ubuntu Artful)
   Status: New => In Progress

** Changed in: vlan (Ubuntu Artful)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: vlan (Ubuntu Xenial)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: vlan (Ubuntu Xenial)
   Importance: Undecided => High

** Changed in: vlan (Ubuntu Artful)
   Importance: Undecided => High

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

from bug 1759573, looks like this does affect X as well as T.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

It appears this ifupdown locking issue doesn't happen in Xenial, but
I'll do more testing to confirm that.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

@smu-u can you please test with the vlan pkg from this ppa:
https://launchpad.net/~ddstreet/+archive/ubuntu/lp1701023

it fixes this specific issue in my test, but I'd like to make sure it
works for you also.

I want to do some more testing with the change as well because ifupdown
is so fragile in this area.  This may also affect newer releases too, so
I need to test those as well.

** Changed in: vlan (Ubuntu)
   Status: Confirmed => In Progress

** Changed in: vlan (Ubuntu)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

** Tags added: regression-update sts

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

I reproduced this hang on trusty and I'm investigating.

** Changed in: vlan (Ubuntu Trusty)
 Assignee: (unassigned) => Dan Streetman (ddstreet)

** Changed in: vlan (Ubuntu Trusty)
   Status: Confirmed => In Progress

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Dan Streetman]

Well I can't say I'm too surprised that something broke, the
ifupdown<->vlan<->udev love triangle of creating and configuring vlans,
is a bit of a mess.  I'll take a look at this as soon as I have a
chance.

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  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Andreas Hasenack]

The changelog since 10.1 mentions #1573272 three times, looks like that
was a tough nut to crack. I'm subscribing ddstreet for consideration.

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Andreas Hasenack]

The changelog since 10.1 mentions #1573272 three times, looks like that
was a tough nut to crack. I'm subscribing ddstreet for consideration.

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https://bugs.launchpad.net/bugs/1701023

Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Joshua Powers]

** Changed in: vlan (Ubuntu)
   Importance: Undecided => High

** Also affects: vlan (Ubuntu Trusty)
   Importance: Undecided
   Status: New

** Changed in: vlan (Ubuntu Trusty)
   Status: New => Confirmed

** Changed in: vlan (Ubuntu Trusty)
   Importance: Undecided => High

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Zach Heilman]

This diff resulted in the boot breaking again:
http://launchpadlibrarian.net/324174495/vlan_1.9-3ubuntu10.1_1.9-3ubuntu10.4.diff.gz
- reverting the change fixed the issue.

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Zach Heilman]

Apologies, I had my versions screwed up. Disregard my previous comment.

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Sven Mueller]

Can we get someone to fix this policy violation, please?

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Sven Mueller]

Note: This behavior is in direct violation of the Debian documentation: 
https://wiki.debian.org/NetworkConfiguration#Bringing_up_an_interface_without_an_IP_address
Specifies:
Note: If you create the VLAN interface only to put it into a bridge, there is 
no need to define the VLAN interface manually. Just configure the bridge, and 
the VLAN interface will be created automatically when creating the bridge (see 
below).

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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[Bug 1701023] Re: (on trusty) version 1.9-3ubuntu10.4 regression blocking boot completion

[Launchpad Bug Tracker]

Status changed to 'Confirmed' because the bug affects multiple users.

** Changed in: vlan (Ubuntu)
   Status: New => Confirmed

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Title:
  (on trusty) version 1.9-3ubuntu10.4 regression blocking boot
  completion

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