3 Commits

Author	SHA1	Message	Date
Peter Krempa	2c4c347c4b	qemu: block: Use 'auto-read-only' instead of 'read-only' for backing chain ... To allow using -blockdev with blockjobs QEMU needs to reopen files in read-write mode when modifying the backing chain. To achieve this we need to use 'auto-read-only' for the backing files rather than the normal 'read-only' property. That way qemu knows that the files need to be reopened. Note that the format drivers (e.g. qcow2) are still opened with the read-only property enabled when being a member of the backing chain since they are supposed to be immutable unless a block job is started. QEMU v4.0 (since commit 23dece19da4) allows also dynamic behaviour for auto-read-only which allows us to use sVirt as we only grant write permissions to files when doing a blockjob. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com>	2019-07-18 17:59:34 +02:00
Peter Krempa	b8240fe704	qemu: block: Don't nest storage layer properties into format layer ... Reference the storage via node name rather than inlining it. This is the approach that will be used with -blockdev/blockdev-add since it allows more control and is more future proof. Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: John Ferlan <jferlan@redhat.com>	2018-05-23 13:18:23 +02:00
Peter Krempa	7e441e2e2c	tests: qemublock: Add test-case for the 'vvfat' driver in qemu ... Test mapping of the 'FAT' disk format to 'vvfat' in qemu. The top level disk image would generate the following '-drive' cmdline: dir-fat-readonly.xml: -drive file=fat:/var/somefiles,if=none,id=drive-dummy,readonly=on -device virtio-blk-pci,scsi=off,drive=drive-dummy,id=dummy dir-fat-floppy.xml -drive file=fat:floppy:/var/somefiles,if=none,id=drive-dummy,readonly=on Signed-off-by: Peter Krempa <pkrempa@redhat.com> Reviewed-by: John Ferlan <jferlan@redhat.com>	2018-05-07 15:55:16 +02:00