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Bug 1136405 - tgtd: service fails to stop if backstore device does not answer
Summary: tgtd: service fails to stop if backstore device does not answer
Keywords:
Status: CLOSED DUPLICATE of bug 852532
Alias: None
Product: Red Hat Enterprise Linux 6
Classification: Red Hat
Component: scsi-target-utils
Version: 6.6
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: rc
: ---
Assignee: Andy Grover
QA Contact: Bruno Goncalves
URL:
Whiteboard:
Depends On:
Blocks: 1268411
TreeView+ depends on / blocked
 
Reported: 2014-09-02 13:49 UTC by Bruno Goncalves
Modified: 2016-04-07 16:02 UTC (History)
1 user (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2015-11-02 17:06:30 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description Bruno Goncalves 2014-09-02 13:49:17 UTC 
Description of problem:
Could not stop tgtd service when backstore device was having timeout.


Version-Release number of selected component (if applicable):
scsi-target-utils-1.0.24-16.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Use scsi_debug as backstore device
# modprobe scsi_debug scsi_level=1 dev_size_mb=100

# lsscsi
[1:0:0:0]    cd/dvd  TSSTcorp CD-ROM  TS-H192C B504  /dev/sr0 
[7:0:0:0]    disk    Linux    scsi_debug       0004  /dev/sda 

# cat /etc/tgt/targets.conf
default-driver iscsi
<target iqn.2009-10.com.redhat:storage-1>
    write-cache off
    allow-in-use yes
    <direct-store /dev/sda>
    </direct-store>
</target>


2. Start tgtd service
# service tgtd restart

3. Discover iSCSI target
# iscsiadm -m discovery -I default -p 127.0.0.1 -t st

4. Login to target
# iscsiadm -m node -l

5. Set timeout on scsi_debug device
# echo 4 > /sys/bus/pseudo/drivers/scsi_debug/opts
# echo 1 > /sys/bus/pseudo/drivers/scsi_debug/every_nth

6. Try to perform IO using the iSCSI device
# dd if=/dev/sdb of=/dev/null
dd: reading `/dev/sdb': Input/output error
40+0 records in
40+0 records out
20480 bytes (20 kB) copied, 90.5412 s, 0.2 kB/s

6. Logout from iSCSI device
# iscsiadm -m node -u

7. Remove iSCSI discovery information
# iscsiadm -m discoverydb  --portal "127.0.0.1" -t sendtargets -o delete

8. Stop tgtd
# service tgtd stop

Actual results:
# service tgtd stop
Stopping SCSI target daemon: initiators still connected[FAILED]

# service tgtd force-stop
Force-stopping SCSI target daemon: tgtadm: this target is still active
Command:
    tgtadm -C 0 --mode target --op delete --tid=1
exited with code: 22.
tgtadm: invalid request
[FAILED]

# tgtadm --lld  iscsi -m target -o show
Target 1: iqn.2009-10.com.redhat:storage-1
    System information:
        Driver: iscsi
        State: offline
    I_T nexus information:
        I_T nexus: 1
            Initiator: iqn.1994-05.com.redhat:tcp-general
            Connection: 0
                IP Address: 127.0.0.1
    LUN information:
        LUN: 0
            Type: controller
            SCSI ID: IET     00010000
            SCSI SN: beaf10
            Size: 0 MB, Block size: 1
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: null
            Backing store path: None
            Backing store flags: 
        LUN: 1
            Type: disk
            SCSI ID: IET     00010001
            SCSI SN: 8000
            Size: 105 MB, Block size: 512
            Online: Yes
            Removable media: No
            Prevent removal: No
            Readonly: No
            Backing store type: rdwr
            Backing store path: /dev/sda
            Backing store flags: 
    Account information:
    ACL information:
Comment 3 minoura makoto 2015-01-27 02:11:48 UTC 
https://github.com/fujita/tgt/commit/e6e8d0fd3b83208278fb7ed765c3665ae7c5ab49 is the fix.
Comment 5 Andy Grover 2015-11-02 17:06:30 UTC 

*** This bug has been marked as a duplicate of bug 852532 ***
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