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Bug 1291825

Summary:	iproute: 'ip addr flush' failed to send flush request: Cannot assign requested address
Product:	Red Hat Enterprise Linux 7	Reporter:	Phil Sutter <psutter>
Component:	iproute	Assignee:	Phil Sutter <psutter>
Status:	CLOSED ERRATA	QA Contact:	Jaroslav Aster <jaster>
Severity:	medium	Docs Contact:	Mirek Jahoda <mjahoda>
Priority:	high
Version:	7.3	CC:	jaster, jiji, jishi, kzhang, mmarusic, network-qe, psutter
Target Milestone:	rc
Target Release:	---
Hardware:	x86_64
OS:	Linux
Whiteboard:
Fixed In Version:	iproute-3.10.0-56.el7	Doc Type:	Deprecated Functionality
Doc Text:	The libnetlink library contained in the _iproute-devel_ package has been deprecated. The user should use the libnl and libmnl libraries instead.	Story Points:	---
Clone Of:	1276591	Environment:
Last Closed:	2016-11-03 23:37:42 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1276591
Bug Blocks:	1301628, 1313485

Comment 3 Jaroslav Aster 2016-05-19 16:26:56 UTC

Hi Phil,

could you be more specific where is the issue on rhel-7? My test for rhel-6 does not work on rhel-7.

I see these messages on the old version and nothing on the new version of iproute. Are these messages a one of the aspect of the bug?

:: [  BEGIN   ] :: Try to flush test-iface :: actually running 'ip addr flush dev test-iface |& tee flush.log'
Dump was interrupted and may be inconsistent.
Dump was interrupted and may be inconsistent.
Dump was interrupted and may be inconsistent.

Comment 4 Phil Sutter 2016-05-20 14:05:12 UTC

Hi Jaroslav,

Yes, the error message is what I had in mind when writing this bug's description. The additional commit to backport was:

commit d25ec03e1dce4cf22093a9f7106e9401ab5bf066
Author: Phil Sutter <phil>
Date:   Tue Nov 24 15:31:02 2015 +0100

    ipaddress: fix ipaddr_flush for Linux >= 3.1
    
    Linux version 3.1 introduced a consistency check for netlink dumps in
    commit 670dc28 ("netlink: advertise incomplete dumps"). This bites
    iproute2 when flushing more addresses than can fit into a single
    RTM_GETADDR response. To silence the spurious error message "Dump was
    interrupted and may be inconsistent.", advise rtnl_dump_filter_l() to
    not care about NLM_F_DUMP_INTR.
    
    Signed-off-by: Phil Sutter <phil>

What does "does not work on rhel-7" mean precisely? If I'm not mistaken, iproute-3.10.0-55.el7 should behave just like described in the original bug, namely printing "Failed to send flush request: Cannot assign requested address" error message when flushing many ip addresses. Do you disagree?

Thanks, Phil

Comment 5 Jaroslav Aster 2016-05-20 15:12:33 UTC

Hi Phil,

"does not work on rhel-7" means my test does not work on rhel-7, because I use this code

rlAssertNotGrep "Failed to send flush request" flush.log
rlAssertNotGrep "Flush terminated" flush.log

Iproute on rhel-7 does not print these messages. It prints only "Dump was interrupted and may be inconsistent." I'm going to fix my test.

Comment 8 errata-xmlrpc 2016-11-03 23:37:42 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHEA-2016-2162.html