Anand Jain ccb0e7d1c1 btrfs: verify subvolid mount parameter
We aren't verifying the parameter passed to the subvolid mount option,
so we won't report and fail the mount if a junk value is specified for
example, -o subvolid=abc.
This patch verifies the subvolid option with match_u64.

Up to now the memparse function accepts the K/M/G/ suffixes, that are
usually meant for size values and do not make sense for a subvolume it.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
2018-03-26 15:09:39 +02:00
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