Bug#847557: /usr/sbin/exportfs: exportfs cannot handle IPv6 addresses

[Bjoern Laessig <b.laessig@pengutronix.de>]

Package: nfs-kernel-server
Version: 1:1.2.8-9.2
Severity: important
File: /usr/sbin/exportfs
Tags: ipv6

Dear Maintainer,

 when trying to export/unexport a path i cannot give IPv6 addresses to
 exportfs.

# showmount -e 
Export list for testhost:
/path/sub fe80::%eth0/10

# exportfs -u [fe80::%eth0]/10:/path/sub
exportfs: Invalid exporting option: [fe80

When removing the [] i get the same error (without [)
When using something like 2001:0db8:1234::/64 the same error occurs.

-- Package-specific info:
-- rpcinfo --
   program vers proto   port  service
    100000    4   tcp    111  portmapper
    100000    3   tcp    111  portmapper
    100000    2   tcp    111  portmapper
    100000    4   udp    111  portmapper
    100000    3   udp    111  portmapper
    100000    2   udp    111  portmapper
    100005    1   udp  59414  mountd
    100005    1   tcp  55223  mountd
    100005    2   udp  44480  mountd
    100005    2   tcp  53745  mountd
    100005    3   udp  41426  mountd
    100005    3   tcp  55737  mountd
    100003    2   tcp   2049  nfs
    100003    3   tcp   2049  nfs
    100003    4   tcp   2049  nfs
    100227    2   tcp   2049
    100227    3   tcp   2049
    100003    2   udp   2049  nfs
    100003    3   udp   2049  nfs
    100003    4   udp   2049  nfs
    100227    2   udp   2049
    100227    3   udp   2049
    100021    1   udp  37459  nlockmgr
    100021    3   udp  37459  nlockmgr
    100021    4   udp  37459  nlockmgr
    100021    1   tcp  34145  nlockmgr
    100021    3   tcp  34145  nlockmgr
    100021    4   tcp  34145  nlockmgr
-- /etc/default/nfs-kernel-server --
RPCNFSDCOUNT=8
RPCNFSDPRIORITY=0
RPCMOUNTDOPTS="--manage-gids"
NEED_SVCGSSD=""
RPCSVCGSSDOPTS=""
-- /etc/exports --
/path/sub 			fe80::%eth0/10(rw,no_subtree_check,no_root_squash)

-- System Information:
Debian Release: stretch/sid
  APT prefers testing
  APT policy: (990, 'testing'), (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'stable'), (500, 'oldstable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.7.0-1-amd64 (SMP w/24 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages nfs-kernel-server depends on:
ii  init-system-helpers  1.46
ii  keyutils             1.5.9-9
ii  libblkid1            2.29-1
ii  libc6                2.24-7
ii  libcap2              1:2.25-1
ii  libsqlite3-0         3.15.2-1
ii  libtirpc1            0.2.5-1
ii  libwrap0             7.6.q-25
ii  lsb-base             9.20161125
ii  netbase              5.3
ii  nfs-common           1:1.2.8-9.2
ii  ucf                  3.0036

nfs-kernel-server recommends no packages.

nfs-kernel-server suggests no packages.

-- no debconf information