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Bug 1981403

Summary: gssd: add timeout for upcall threads
Product: Red Hat Enterprise Linux 8 Reporter: Steve Dickson <steved>
Component: nfs-utilsAssignee: Steve Dickson <steved>
Status: CLOSED ERRATA QA Contact: Yongcheng Yang <yoyang>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 8.5CC: acaringi, fsorenso, smayhew, xzhou
Target Milestone: betaKeywords: Patch, Triaged
Target Release: ---Flags: pm-rhel: mirror+
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: nfs-utils-2.3.3-44.el8 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-11-09 19:40:03 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:
Deadline: 2021-08-24   

Description Steve Dickson 2021-07-12 13:45:31 UTC 
Description of problem:
    Add a global list of active upcalls and a watchdog thread that walks the
    list, looking for threads running longer than timeout seconds.  By
    default, an error message will by logged to the syslog.
    
    The upcall timeout can be specified by passing the -U option or by
    setting the upcall-timeout parameter in nfs.conf.
    
    Passing the -C option or setting cancel-timed-out-upcalls=1 in nfs.conf
    causes the watchdog thread to also cancel timed-out upcall threads and
    report an error of -ETIMEDOUT to the kernel.


Additional info:

commit a3d6e20753de4c5b97f66329f995d1adb1ac7149 (tag: nfs-utils-2-5-4-rc6)
Author: Scott Mayhew <smayhew>
Date:   Sat May 29 14:25:51 2021 -0400

    gssd: add timeout for upcall threads
Comment 1 Yongcheng Yang 2021-07-21 02:56:21 UTC 
Verified with nfs-utils-2.3.3-44.el8

###########
# -U option
###########
[05:49:59 root@ ~~]# rpc.gssd -U 100
[05:49:59 root@ ~~]# ps axf | grep -v grep | grep "rpc.gssd"
  21763 ?        Ssl    0:00 rpc.gssd -U 100
[05:49:59 root@ ~~]# pkill $prog

[05:49:59 root@ ~~]# cat /etc/nfs.conf
[gssd]
upcall-timeout=10
[05:49:59 root@ ~~]# rpc.gssd
[05:49:59 root@ ~~]# ps axf | grep -v grep | grep "rpc.gssd"
  21845 ?        Ssl    0:00 rpc.gssd
[05:49:59 root@ ~~]# pkill $prog

###########
# -C option
###########
[05:50:00 root@ ~~]# rpc.gssd -C -U 300
[05:50:00 root@ ~~]# ps axf | grep -v grep | grep "rpc.gssd"
  22025 ?        Ssl    0:00 rpc.gssd -C -U 300
[05:50:00 root@ ~~]# pkill $prog

[05:50:01 root@ ~~]# cat /etc/nfs.conf
[gssd]
upcall-timeout=300
cancel-timed-out-upcalls=yes
[05:50:00 root@ ~~]# rpc.gssd
[05:50:01 root@ ~~]# ps axf | grep -v grep | grep "rpc.gssd"
  22107 ?        Ssl    0:00 rpc.gssd
[05:50:01 root@ ~~]# pkill $prog
Comment 8 errata-xmlrpc 2021-11-09 19:40:03 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 (nfs-utils bug fix and enhancement update), 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://access.redhat.com/errata/RHBA-2021:4403