Public bug reported:
With a large number of targets tgtadm --mode target --op show returns
inconsistent results. Some targets are not listed during one run, but
are shown by a run immediately after.
I grabbed the binary from the wily package and I am getting consistent
results, so somewhere between 1.0.43 and 1.0.57 upstream seems to have
patched the bug.
Can we get 1.0.57 (or whatever version has the fix) backported to
trusty?
----
# ./tgtadm -L iscsi --mode target --op show | fgrep -c Target
564
# dpkg -l | fgrep tgt
ii tgt 1:1.0.43-0ubuntu4 amd64
Linux SCSI target user-space tools
# cat /etc/lsb-release
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=14.04
DISTRIB_CODENAME=trusty
DISTRIB_DESCRIPTION="Ubuntu 14.04.1 LTS"
----
Buggy 1.0.43 version:
# for i in {1..100} ; do diff -u <(/usr/sbin/tgtadm -L iscsi --mode target --op
show | fgrep Target) <(/usr/sbin/tgtadm -L iscsi --mode target --op show |
fgrep Target) ; sleep 1 ; done
--- /dev/fd/63 2015-09-22 23:05:38.648448562 +0000
+++ /dev/fd/62 2015-09-22 23:05:38.648448562 +0000
@@ -560,3 +560,5 @@
Target 574:
iqn.2010-10.org.openstack:volume-7adaa3bc-fafc-4421-baf7-b25102de1922
Target 578:
iqn.2010-10.org.openstack:volume-892c6840-ca04-4474-9976-9eaa8b54c4d2
Target 579:
iqn.2010-10.org.openstack:volume-d1d8062f-be47-4f33-b5b9-1befdfb09f65
+Target 580:
iqn.2010-10.org.openstack:volume-32a9e401-cf44-4f8f-ba93-fd43ff758e45
+Target 581:
iqn.2010-10.org.openstack:volume-ddcebcc4-eb13-459e-be1d-2068ee03a4c6
--- /dev/fd/63 2015-09-22 23:05:40.720506264 +0000
+++ /dev/fd/62 2015-09-22 23:05:40.720506264 +0000
@@ -560,3 +560,4 @@
Target 574:
iqn.2010-10.org.openstack:volume-7adaa3bc-fafc-4421-baf7-b25102de1922
Target 578:
iqn.2010-10.org.openstack:volume-892c6840-ca04-4474-9976-9eaa8b54c4d2
Target 579:
iqn.2010-10.org.openstack:volume-d1d8062f-be47-4f33-b5b9-1befdfb09f65
+Target 580:
iqn.2010-10.org.openstack:volume-32a9e401-cf44-4f8f-ba93-fd43ff758e45
--- /dev/fd/63 2015-09-22 23:05:41.752535004 +0000
+++ /dev/fd/62 2015-09-22 23:05:41.752535004 +0000
@@ -560,3 +560,5 @@
Target 574:
iqn.2010-10.org.openstack:volume-7adaa3bc-fafc-4421-baf7-b25102de1922
Target 578:
iqn.2010-10.org.openstack:volume-892c6840-ca04-4474-9976-9eaa8b54c4d2
Target 579:
iqn.2010-10.org.openstack:volume-d1d8062f-be47-4f33-b5b9-1befdfb09f65
+Target 580:
iqn.2010-10.org.openstack:volume-32a9e401-cf44-4f8f-ba93-fd43ff758e45
+Target 581:
iqn.2010-10.org.openstack:volume-ddcebcc4-eb13-459e-be1d-2068ee03a4c6
--- /dev/fd/63 2015-09-22 23:05:43.828592816 +0000
+++ /dev/fd/62 2015-09-22 23:05:43.828592816 +0000
@@ -560,4 +560,3 @@
Target 574:
iqn.2010-10.org.openstack:volume-7adaa3bc-fafc-4421-baf7-b25102de1922
Target 578:
iqn.2010-10.org.openstack:volume-892c6840-ca04-4474-9976-9eaa8b54c4d2
Target 579:
iqn.2010-10.org.openstack:volume-d1d8062f-be47-4f33-b5b9-1befdfb09f65
-Target 580:
iqn.2010-10.org.openstack:volume-32a9e401-cf44-4f8f-ba93-fd43ff758e45
----
Working 1.0.57 version:
# for i in {1..100} ; do diff -u <(./tgtadm -L iscsi --mode target --op show |
fgrep Target) <(./tgtadm -L iscsi --mode target --op show | fgrep Target) ;
sleep 1 ; done
#
** Affects: tgt (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/1498697
Title:
Targets are not consistently shown with large numbers of targets
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