btrfs: filter invalid arg for btrfs resize
Originally following cmds will work: # btrfs fi resize -10A <mnt> # btrfs fi resize -10Gaha <mnt> Filter the arg by checking the return pointer of memparse. Signed-off-by: NGui Hecheng <guihc.fnst@cn.fujitsu.com> Signed-off-by: NChris Mason <clm@fb.com>
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