Comment 9 for bug 1439855

hi Sean:

I have not checked the kernel code.
I just try it on my Ubuntu 14.04

It seams it is OK device names <= 128 characters in length.

$ wc -c <<< $DMNANE129
129
$ wc -c <<< $DMNANE128
128

$ sudo cryptsetup create --key-file=- --cipher aes-xts-plain64 --key-size 512 $DMNANE129 /dev/loop0
Name "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaddd" too long.

$ sudo cryptsetup create --key-file=- --cipher aes-xts-plain64 --key-size 512 $DMNANE128 /dev/loop0
Enter passphrase: Error reading passphrase from terminal