btrfs: verify subvolid mount parameter

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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>

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Anand Jain 2018-02-15 01:11:37 +08:00 • committed by David Sterba

parent 5811375325

commit ccb0e7d1c1

1 changed files with 9 additions and 12 deletions

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fs/btrfs/super.c

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