Run btrfs rescan only if userDiskQuota is enabled
Run btrfs rescan only if userDiskQuota is enabled

This fix tries to address the issue raised in 29810
where btrfs subvolume removal failed when docker
is in an unprivileged lxc container. The failure
was caused by `Failed to rescan btrfs quota` with
`operation not permitted`.

However, if disk quota is not enabled, there is no
need to run a btrfs rescan at the first place.

This fix checks for `quotaEnabled` and only run btrfs
rescan if `quotaEnabled` is true.

This fix fixes 29810.

Signed-off-by: Yong Tang <765086fe2e0c1f980161f127fec596800f327f62@outlook.com>

yummypeng/docker,haveatry/docker,tmp6154/docker,whuwxl/docker,thtanaka/docker,konstruktoid/docker-1,yasiramin10p/moby,haveatry/docker,AkihiroSuda/docker,gnailuy/docker,ibuildthecloud/docker,JMesser81/docker,ndeloof/docker,yongtang/docker,dmcgowan/docker,HideoYamauchi/docker,mikebrow/docker,dims/docker,alfred-landrum/docker,q384566678/docker,paralin/docker,miminar/docker,naveed-jamil-tenpearls/moby,allencloud/docker,KarthikNayak/docker,nalind/docker,mike1729/docker,paralin/docker,KingEmet/docker,bonczj/moby-json-file-logger,Syntaxide/docker,dccurtis/docker,madhanrm/docker,duglin/docker,KarthikNayak/docker,yosifkit/docker,jlhawn/docker,vdemeester/docker,justincormack/docker,fcrisciani/docker,jlhawn/docker,kolyshkin/moby,konstruktoid/docker-1,jameszhan/docker,jameszhan/docker,vdemeester/docker,kojiromike/docker,djs55/docker,jimjag/docker,pramodhkp/moby,darrenstahlmsft/docker,dsheets/moby,jwhonce/docker,sdurrheimer/docker,whuwxl/docker,moypray/docker,YuPengZTE/docker,srust/docker,mikebrow/docker,q384566678/docker,jimjag/docker,mtesselH/docker,imkin/moby,Ramzec/docker,rremer/moby,hqhq/moby,kencochrane/docker,justincormack/docker,unclejack/docker,pradipd/moby,trebonian/docker,thaJeztah/docker,shhsu/docker,erikstmartin/docker,nalind/docker,bearstech/moby,vdemeester/docker,amatsus/docker,duglin/docker,ffoysal/docker,xuxinkun/docker,Ramzec/docker,tonistiigi/docker,q384566678/docker,ibuildthecloud/docker,hqhq/moby,lixiaobing1/docker,darrenstahlmsft/moby,mstanleyjones/docker,rancher/docker,rremer/moby,laijs/docker,mahak/docker,jvanz/docker,danyalKhaliq10p/moby,konstruktoid/docker-upstream,alfred-landrum/docker,moypray/docker,diogomonica/docker,danyalKhaliq10p/moby,gnailuy/docker,bearstech/moby,tmp6154/docker,moul/docker,mkumatag/docker,ffoysal/docker,SvenDowideit/docker,pramodhkp/moby,mkumatag/docker,konstruktoid/docker-upstream,danyalKhaliq10p/moby,noironetworks/docker,ripcurld0/moby,bonczj/moby-json-file-logger,nalind/docker,imkin/moby,mahak/docker,prertik/docker,resin-io/docker,KingEmet/docker,scotttlin/docker,cpuguy83/docker,Ramzec/docker,rremer/moby,sarnautov/moby,trebonian/docker,lixiaobing10051267/docker,PatrickLang/moby,rhatdan/docker,jwhonce/docker,gnailuy/docker,x1022as/docker,yosifkit/docker,AkihiroSuda/docker,gschaetz/moby,kolyshkin/moby,KarthikNayak/docker,konstruktoid/docker-1,rancher/docker,docker/docker,catinthesky/docker,ibuildthecloud/docker,yummypeng/docker,paralin/docker,kojiromike/docker,kencochrane/docker,raja-sami-10p/moby,estesp/docker,liaoqingwei/docker,shishir-a412ed/docker,Mokolea/docker,gschaetz/moby,tklauser/docker,dgageot/docker,moul/docker,sdurrheimer/docker,tophj-ibm/moby,darrenstahlmsft/moby,charleszheng44/moby,laijs/moby,fcrisciani/docker,xuxinkun/docker,johnstep/moby-moby,nawawi/docker,docker/docker,dperny/docker,flavio/docker,moby/moby,dsheets/moby,duglin/docker,YuPengZTE/docker,akira-baruah/docker,shishir-a412ed/docker,rhatdan/docker,johnstep/moby-moby,jthelin/docker,sarnautov/moby,dsheets/moby,mstanleyjones/docker,flavio/docker,ffoysal/docker,dccurtis/docker,jimjag/docker,YuPengZTE/docker,shhsu/docker,erikh/docker,liaoqingwei/docker,fcrisciani/docker,ripcurld0/moby,kolyshkin/docker,ripcurld0/moby,darrenstahlmsft/docker,mikebrow/docker,ColinHebert/docker,diogomonica/docker,diogomonica/docker,nawawi/docker,gnailuy/docker,yongtang/docker,lixiaobing1/docker,xuxinkun/docker,mike1729/docker,allencloud/docker,sterchelen/docker,alfred-landrum/docker,dmcgowan/docker,mike1729/docker,miminar/docker,mkumatag/docker,allencloud/docker,cpuguy83/docker,cyphar/docker,mixja/docker,mstanleyjones/docker,michael-holzheu/docker,bonczj/moby-json-file-logger,pramodhkp/moby,prertik/docker,unclejack/docker,jvanz/docker,POLJM242/docker,moby/moby,sterchelen/docker,kojiromike/docker,dperny/docker,tonistiigi/docker,coreos/docker,miminar/docker,tophj-ibm/moby,qudongfang/docker,bearstech/moby,jlhawn/docker,liaoqingwei/docker,justincormack/docker,flavio/docker,yummypeng/docker,mixja/docker,dgageot/docker,laijs/docker,tophj-ibm/docker,mahak/docker,SvenDowideit/docker,nawawi/docker,ndeloof/docker,crosbymichael/docker,coolljt0725/docker,madhanrm/docker,gschaetz/moby,thtanaka/docker,cpuguy83/docker,x1022as/docker,ColinHebert/docker,flavio/docker,tophj-ibm/docker,catinthesky/docker,naveed-jamil-tenpearls/moby,scotttlin/docker,ndeloof/docker,dperny/docker,JMesser81/docker,srust/docker,raja-sami-10p/moby,maxamillion/docker,lixiaobing10051267/docker,tianon/docker,akira-baruah/docker,darrenstahlmsft/docker,jameszhan/docker,docker/docker,ColinHebert/docker,raja-sami-10p/moby,haveatry/docker,konstruktoid/docker-upstream,cyphar/docker,michael-holzheu/docker,JMesser81/docker,noironetworks/docker,erikstmartin/docker,ibuildthecloud/docker,pradipd/moby,tophj-ibm/moby,nalind/docker,tmp6154/docker,prertik/docker,shhsu/docker,whuwxl/docker,coolljt0725/docker,tklauser/docker,noironetworks/docker,jwhonce/docker,trebonian/docker,coreos/docker,moul/docker,moul/docker,PatrickLang/moby,sdurrheimer/docker,scotttlin/docker,qudongfang/docker,dmcgowan/docker,imkin/moby,Mokolea/docker,konstruktoid/docker-upstream,lixiaobing1/docker,moby/moby,mtesselH/docker,yosifkit/docker,Syntaxide/docker,trebonian/docker,tophj-ibm/docker,maxamillion/docker,Syntaxide/docker,SvenDowideit/docker,michael-holzheu/docker,sterchelen/docker,qudongfang/docker,yasiramin10p/moby,gjaskiewicz/moby,mtesselH/docker,srust/docker,yasiramin10p/moby,amatsus/docker,jvanz/docker,laijs/moby,erikh/docker,djs55/docker,erikstmartin/docker,HideoYamauchi/docker,laijs/docker,tonistiigi/docker,yosifkit/docker,dccurtis/docker,HideoYamauchi/docker,estesp/docker,darrenstahlmsft/moby,naveed-jamil-tenpearls/moby,kencochrane/docker,Mokolea/docker,bearstech/moby,cpuguy83/docker,laijs/moby,tklauser/docker,coolljt0725/docker,shishir-a412ed/docker,cyphar/docker,madhanrm/docker,charleszheng44/moby,POLJM242/docker,maxamillion/docker,rhatdan/docker,PatrickLang/moby,Mokolea/docker,thaJeztah/docker,tianon/docker,thaJeztah/docker,estesp/docker,ibuildthecloud/docker,mahak/docker,rancher/docker,dgageot/docker,KingEmet/docker,moypray/docker,yongtang/docker,kolyshkin/moby,dims/docker,hqhq/moby,sarnautov/moby,thaJeztah/docker,djs55/docker,AkihiroSuda/docker,catinthesky/docker,coreos/docker,AkihiroSuda/docker,resin-io/docker,dims/docker,lixiaobing10051267/docker,jthelin/docker,pradipd/moby,charleszheng44/moby,resin-io/docker,kolyshkin/docker,gjaskiewicz/moby,crosbymichael/docker,paralin/docker,erikh/docker,johnstep/moby-moby,jimjag/docker,mixja/docker,nawawi/docker,thtanaka/docker,x1022as/docker,gjaskiewicz/moby,crosbymichael/docker,moby/moby,amatsus/docker,Ramzec/docker,unclejack/docker