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(parent: 73e2fc5) | patch
um: fix ubd cow size
authorRichard Weinberger <richard@nod.at>
Wed, 2 Nov 2011 12:17:27 +0000 (13:17 +0100)
committerGreg Kroah-Hartman <gregkh@suse.de>
Fri, 11 Nov 2011 17:36:19 +0000 (09:36 -0800)
commit5f0d9e03e7e0792fbd36ba9fb9859f0ef7956a20
treecd9ef9985579e0a316808981ba2d00c834eff8d2tree | snapshot
parent73e2fc5d34007574d25d00e7088bbd42e988bb3ecommit | diff
um: fix ubd cow size

commit 8535639810e578960233ad39def3ac2157b0c3ec upstream.

ubd_file_size() cannot use ubd_dev->cow.file because at this time
ubd_dev->cow.file is not initialized.
Therefore, ubd_file_size() will always report a wrong disk size when
COW files are used.
Reading from /dev/ubd* would crash the kernel.

We have to read the correct disk size from the COW file's backing
file.

Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
arch/um/drivers/ubd_kern.c diff | blob | history
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