NFSv4: Unable to mount, nonsensical error

[Andreas Reis <andreas.reis@gmail.com>]

Hi,

I'm trying to automount a NFSv4 share to /mnt/bar from Host A via a 
direct map, but can't get it to work no matter what.

Mounting it manually with the very same options works perfectly fine.

auto.master:
/-     /etc/autofs/bar.nfs    --timeout=15 --ghost
/foo   /etc/autofs/auto.nfs   --timeout=15

The second line is an executable map for NFSv3 shares from Host B. That 
one works as intended. However…

fs.nfs:
/mnt/bar -fstype=nfs4,rw,soft,async,_netdev,rsize=8192,wsize=8192 
192.168.1.144:bar
(on one line)

… fails. Instead, the folder is still created, but accessing it yields 
"No such file or directory".

Meanwhile automount prints a nonsensical …

"validate_location: expected colon delimeter not found in location 
192.168.1.144:bar"

… which from an error path (with a typo) in parse_sun.c's 
validate_location that was added in autofs 5.0.6.

Maybe the person who added it missed that unlike mount requests for 
NFSv3 shares, NFSv4 ones need not (depending on the server, must not) 
have a "/" after the ":"?

Because that however is what the somewhat misleadingly named check_colon 
function called by validate_location checks.

Nonetheless, patching that path to still return 1 resolved nothing.

Any ideas?

(Distro is Arch, updated packages, ie. autofs 5.1.0.)

Thanks,
Andreas