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The LOOP_SET_CAPACITY allows to resize loop device size.
Example:
# blockdev --getsize64 /dev/loop0
10485760
# dd if=/dev/zero of=/home/images/aaa.img count=10 bs=1M oflag=append conv=notrunc
# blockdev --getsize64 /dev/loop0
10485760
# ./losetup --set-capacity /dev/loop0
# blockdev --getsize64 /dev/loop0
20971520
CC: J. R. Okajima <hooanon05@yahoo.co.jp>
Signed-off-by: Karel Zak <kzak@redhat.com>
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This allows a flag to be set on loop devices so that when they are closed
for the last time, they'll self-destruct.
The kernel part has been submitted to lkml by David Woodhouse.
Signed-off-by: Bernardo Innocenti <bernie@codewiz.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
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The kernel loop_info64 definition uses __u{8,32,64} types,
but userspace uses unsigned {long long,int,char} types.
This patch turns into exactly defined standard uint{8,32,64}_t types.
Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Karel Zak <kzak@redhat.com>
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Signed-off-by: Karel Zak <kzak@redhat.com>
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