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authorMax Reitz <mreitz@redhat.com>2013-08-30 14:34:25 +0200
committerKevin Wolf <kwolf@redhat.com>2013-08-30 15:48:43 +0200
commita40f1c2add4d5f58d594f810fe36cabcf32bc4b0 (patch)
tree8ebc954d9b21e138c0f06bca4f806d66e40bdc82 /QMP
parent69c98726537627e708abb8fcb33e3a2b10e40bf1 (diff)
qcow2: Metadata overlap checks
Two new functions are added; the first one checks a given range in the image file for overlaps with metadata (main header, L1 tables, L2 tables, refcount table and blocks). The second one should be used immediately before writing to the image file as it calls the first function and, upon collision, marks the image as corrupt and makes the BDS unusable, thereby preventing further access. Both functions take a bitmask argument specifying the structures which should be checked for overlaps, making it possible to also check metadata writes against colliding with other structures. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'QMP')
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