Fam Zheng
c1d4096b0f
iscsi: Refuse to open as writable if the LUN is write protected
Before, when a write protected iSCSI target is attached as scsi-disk with BDRV_O_RDWR, we report it as writable, while in fact all writes will fail. One way to improve this is to report write protect flag as true to guest, but a even better way is to refuse using a write protected LUN to guest. Target write protect flag is checked with a mode sense query. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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