Date: Mon, 7 Mar 2016 13:31:37 +0100 From: =?UTF-8?Q?Gustau_P=c3=a9rez?= <gustau.perez@gmail.com> To: FreeBSD XEN <freebsd-xen@freebsd.org> Subject: Re: Porting the block-iscsi hotplug script Message-ID: <56DD74A9.3050709@gmail.com> In-Reply-To: <alpine.OSX.2.20.1603041647160.22025@mac> References: <553DEB97.5000300@entel.upc.edu> <555EF542.3090002@citrix.com> <555F9B3F.1000600@entel.upc.edu> <55602512.1090702@citrix.com> <56C6FA2F.8040900@gmail.com> <56CAC8CB.8030107@gmail.com> <56CADEDA.4050007@citrix.com> <56CB0057.1060509@gmail.com> <56CB041E.1020009@citrix.com> <56CB2D90.5080809@gmail.com> <56CB34BA.6060809@citrix.com> <56CC24BD.6050609@gmail.com> <56CC32E5.5010101@citrix.com> <56CC7637.3080408@gmail.com> <56CF5668.6090605@citrix.com> <56D0091F.80408@gmail.com> <56D02863.7040100@citrix.com> <56D03D95.9090509@gmail.com> <56D04E5F.8070901@citrix.com> <56D42A28.8050701@gmail.com> <56D434FC.8030905@citrix.com> <56D57110.2060406@gmail.com> <56D587D8.6030702@citrix.com> <56D590EA.609@gmail.com> <56D591BA.4020303@gmail.com> <56D5929F.7040001@citrix.com> <56D5C722.3080205@gmail.com> <56D6B68D.8080809@citrix.com> <56D7FEFE.9050000@gmail.com> <alpine.OSX.2.20.1603041055250.20397@mac> <56D97762.7000908@gmail.com> <alpine.OSX.2.20.1603041647160.22025@mac>
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El 4/03/16 a les 16:54, Roger Pau Monné ha escrit: > > Linux already has some code to do this checking, but this also involves > taking a lock in order to make sure there's only one hotplug script > performing this check at the same time. > > The Linux function that performs this checking is in: > > http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=tools/hotplug/Linux/block;h=2691b56951c9b82094471a141b9e0bed04abb929;hb=HEAD#l40 > > And the caller is: > > http://xenbits.xen.org/gitweb/?p=xen.git;a=blob;f=tools/hotplug/Linux/block;h=2691b56951c9b82094471a141b9e0bed04abb929;hb=HEAD#l275 > > If you take a look, the call to check_device_sharing is protected with the > "block" lock. > Thank you, today I wasn't unable to code, I hope I'll have some time this afternoon. Btw, In coding sh style, I don't want to bring in bash and add another dependency to the xen-tools port. Gustau
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