libebtc: Fix an issue that '--concurrent' doesn't work with NFS

Due to the following commit[1] from kernel, if '/var/lib/ebtables' was
mounted with a NFS filesystem, ebtables command will hit the following
error:
mount | grep nfs
x.x.x.x:/var/lib/ebtables on /var/lib/ebtables type nfs4 [...]
/usr/sbin/ebtables --concurrent -L
Trying to obtain lock /var/lib/ebtables/lock
Trying to obtain lock /var/lib/ebtables/lock
Trying to obtain lock /var/lib/ebtables/lock
Trying to obtain lock /var/lib/ebtables/lock
[...]

In order to fix this problem, add 'O_WRONLY' to match the requirement of
that kernel commit[1].

[1]: 55725513b5ef ("NFSv4: Ensure that we check lock exclusive/shared type against open modes")

Signed-off-by: Firo Yang <firo.yang@suse.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

0 files changed, 0 insertions, 0 deletions