block: add block driver read only whitelist

Enterprise / Virtualization / QEMU - Fam Zheng [redhat.com] - 4 June 2013 05:11 UTC

We may want to include a driver in the whitelist for read only tasks such as diagnosing or exporting guest data (with libguestfs as a good example). This patch introduces a readonly whitelist option, and for backward compatibility, the old configure option --block-drv-whitelist is now an alias to rw whitelist.

Drivers in readonly list is only permitted to open file readonly, and returns -ENOTSUP for RW opening.

E.g. To include vmdk readonly, and others read+write: ./configure --target-list=x86_64-softmmu \--block-drv-rw-whitelist=qcow2,raw,file,qed \--block-drv-ro-whitelist=vmdk

b64ec4e block: add block driver read only whitelist
block.c | 43 +++++++++++++++++++++++++++----------------
blockdev.c | 4 ++--
configure | 20 +++++++++++++++-----
hw/block/xen_disk.c | 8 ++++++--
include/block/block.h | 3 ++-
scripts/create_config | 11 +++++++++--
6 files changed, 61 insertions(+), 28 deletions(-)

Upstream: git.qemu.org

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