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Bug 1809748 - Blacklist exception entry property "(SCSI_IDENT_|ID_WWN)" causes path states to be incorrectly displayed as active faulty
Summary: Blacklist exception entry property "(SCSI_IDENT_|ID_WWN)" causes path states ...
Keywords:
Status: CLOSED DUPLICATE of bug 1785062
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: device-mapper-multipath
Version: 8.1
Hardware: x86_64
OS: Linux
unspecified
unspecified
Target Milestone: rc
: 8.0
Assignee: Ben Marzinski
QA Contact: Lin Li
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2020-03-03 19:37 UTC by Amaresh
Modified: 2021-09-06 15:38 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2020-06-03 14:24:59 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)
sos report from the host (12.52 MB, application/x-xz)
2020-03-03 19:46 UTC, Amaresh 		no flags Details
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Issue Tracker RHELPLAN-38549 0 None None None 2021-09-06 15:38:40 UTC

Description Amaresh 2020-03-03 19:37:42 UTC 
Description of problem:
On RHEL8.x (8.0 and 8.1)systems with LUNs mapped from Nimble Storage Controllers, the Blacklist exception entry property "(SCSI_IDENT_|ID_WWN)" in multipath.conf causes the paths to be displayed as faulty in multipath -ll output. 

See the output below
[root@rtp-hpe-ops07 ~]# multipath -ll
mpatha (204e7317153404e246c9ce900d54f5505) dm-0 ##,##
size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=0 status=active
| |- #:#:#:# sdb 8:16 active faulty running
| |- #:#:#:# sdc 8:32 active faulty running
| |- #:#:#:# sdg 8:96 active faulty running
| `- #:#:#:# sdh 8:112 active faulty running
`-+- policy='service-time 0' prio=0 status=enabled
  |- #:#:#:# sdd 8:48 active faulty running
  |- #:#:#:# sde 8:64 active faulty running
  |- #:#:#:# sdf 8:80 active faulty running
  `- #:#:#:# sdi 8:128 active faulty running

Multipath.conf looks like below:
defaults {
    user_friendly_names yes
}
blacklist {
}
blacklist_exceptions {
        property "(SCSI_IDENT_|ID_WWN)"
}
devices {
    device {
        product              "Server"
        failback             immediate
        path_grouping_policy group_by_prio
        no_path_retry        30
        dev_loss_tmo         infinity
        hardware_handler     "1 alua"
        fast_io_fail_tmo     5
        rr_min_io_rq         1
        vendor               "Nimble"
        rr_weight            uniform
        path_checker         tur
        prio                 "alua"
        path_selector        "service-time 0"
    }
}

Once the blacklist exception entry is commented out the multipath -ll output reports the path states correctly. See below:

[root@rtp-hpe-ops07 ~]# multipath -ll
mpatha (204e7317153404e246c9ce900d54f5505) dm-0 Nimble,Server
size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 3:0:0:0 sdb 8:16  active ready running
| |- 3:0:1:0 sdc 8:32  active ready running
| |- 5:0:1:0 sdg 8:96  active ready running
| `- 5:0:2:0 sdh 8:112 active ready running
`-+- policy='service-time 0' prio=1 status=enabled
  |- 3:0:2:0 sdd 8:48  active ghost running
  |- 3:0:3:0 sde 8:64  active ghost running
  |- 5:0:0:0 sdf 8:80  active ghost running
  `- 5:0:3:0 sdi 8:128 active ghost running


Version-Release number of selected component (if applicable):
device-mapper-event-1.02.163-5.el8.x86_64
device-mapper-libs-1.02.163-5.el8.x86_64
device-mapper-persistent-data-0.8.5-2.el8.x86_64
device-mapper-event-libs-1.02.163-5.el8.x86_64
device-mapper-multipath-libs-0.8.0-5.el8.x86_64
device-mapper-1.02.163-5.el8.x86_64
device-mapper-multipath-0.8.0-5.el8.x86_64


How reproducible:


Steps to Reproduce:
1.Install RH8.x and enable multipath.
2.Create and map a few LUNs from Nimble Storage controller to the server 
3.Add the below entry to multipath.conf file
blacklist_exceptions {
        property "(SCSI_IDENT_|ID_WWN)"
} 
4.Reload multipath
5. Fire the command multipath -ll

Actual results:
Paths are listed as faulty

[root@rtp-hpe-ops07 ~]# multipath -ll
mpatha (204e7317153404e246c9ce900d54f5505) dm-0 ##,##
size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=0 status=active
| |- #:#:#:# sdb 8:16 active faulty running
| |- #:#:#:# sdc 8:32 active faulty running
| |- #:#:#:# sdg 8:96 active faulty running
| `- #:#:#:# sdh 8:112 active faulty running
`-+- policy='service-time 0' prio=0 status=enabled
  |- #:#:#:# sdd 8:48 active faulty running
  |- #:#:#:# sde 8:64 active faulty running
  |- #:#:#:# sdf 8:80 active faulty running
  `- #:#:#:# sdi 8:128 active faulty running

Expected results:
Paths should be displayed as below:
[root@rtp-hpe-ops07 ~]# multipath -ll
mpatha (204e7317153404e246c9ce900d54f5505) dm-0 Nimble,Server
size=250G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
|-+- policy='service-time 0' prio=50 status=active
| |- 3:0:0:0 sdb 8:16  active ready running
| |- 3:0:1:0 sdc 8:32  active ready running
| |- 5:0:1:0 sdg 8:96  active ready running
| `- 5:0:2:0 sdh 8:112 active ready running
`-+- policy='service-time 0' prio=1 status=enabled
  |- 3:0:2:0 sdd 8:48  active ghost running
  |- 3:0:3:0 sde 8:64  active ghost running
  |- 5:0:0:0 sdf 8:80  active ghost running
  `- 5:0:3:0 sdi 8:128 active ghost running


Additional info:
Comment 1 Amaresh 2020-03-03 19:46:45 UTC 
Created attachment 1667291 [details]
sos report from the host
Comment 2 Ben Marzinski 2020-06-02 22:18:16 UTC 
Do you know if this continues to happen in rhel-8.2? The fixes for the sg3_utils bzs #1746414 and #1785062 added udev rules that should set SCSI_IDENT_*, so this will hopefully work correctly now.
Comment 3 Amaresh 2020-06-03 01:29:58 UTC 
I don't see this on RHEL-8.2.

[root@rtp-hpe-ops07 ~]# cat /etc/redhat-release
Red Hat Enterprise Linux release 8.2 (Ootpa)
[root@rtp-hpe-ops07 ~]# cat /etc/multipath.conf
defaults {
    user_friendly_names yes
}
blacklist {
}
blacklist_exceptions {
        property "(SCSI_IDENT_|ID_WWN)"
}
devices {
    device {
        product              "Server"
        failback             immediate
        path_grouping_policy group_by_prio
        no_path_retry        30
        dev_loss_tmo         infinity
        hardware_handler     "1 alua"
        fast_io_fail_tmo     5
        rr_min_io_rq         1
        vendor               "Nimble"
        rr_weight            uniform
        path_checker         tur
        prio                 "alua"
        path_selector        "service-time 0"
    }
}

[root@rtp-hpe-ops07 ~]# multipath -ll
mpathe (23841f8cda17bd2d36c9ce9003c1acdc6) dm-8 Nimble,Server
size=650G features='1 queue_if_no_path' hwhandler='1 alua' wp=rw
`-+- policy='service-time 0' prio=50 status=active
  |- 6:0:0:11 sdaa 65:160 active ready running
  |- 6:0:1:11 sdac 65:192 active ready running
  |- 6:0:2:11 sdae 65:224 active ready running
  |- 6:0:3:11 sdag 66:0   active ready running
  |- 7:0:0:11 sdai 66:32  active ready running
  |- 7:0:1:11 sdak 66:64  active ready running
  |- 7:0:2:11 sdam 66:96  active ready running
  `- 7:0:3:11 sdao 66:128 active ready running


Thanks,
Amaresh
Comment 4 Ben Marzinski 2020-06-03 14:24:59 UTC 
Great. I'm closing this as a duplicate of 1785062, which adds /usr/lib/udev/rules.d/61-scsi-sg3_id.rules, and fixes this problem.

*** This bug has been marked as a duplicate of bug 1785062 ***
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