[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: [Qemu-devel] [PATCH 5/7] xen: add block device backend driver.
Gerd Hoffmann, le Tue 05 Aug 2008 13:07:52 +0200, a écrit : > Samuel Thibault wrote: > > Gerd Hoffmann, le Tue 05 Aug 2008 08:52:26 +0200, a écrit : > >>> There is: the info node, which is an OR of the > >>> VDISK_CDROM/REMOVABLE/READONLY flags. > >> Who sets that node? Backend driver or xend? > > > > backend, see linux/driver/xen/blkback/xenbus.c > > Hmm, ok. > > mode="r" (in backend directory) means readonly, ok. > device-type="cdrom" (backend dir too) means cdrom, ok. These are set by xend, i.e. when they come from the config, indeed. > removable can't be indicated to the backend via xenstore? Doesn't look like it is possible. Why would you want to do that? > btw: Looks like blktap doesn't set any VDISK_* flags? I guess that's because blktap doesn't have the information. The "info" node is information about the underlying source of data, detected by the block backend, while "mode" and "device-type" are configured by the user (and should override the "info" information I guess). Samuel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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