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@xxxxxxxx>
---
libebtc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libebtc.c b/libebtc.c
index 1b058ef..112c307 100644
--- a/libebtc.c
+++ b/libebtc.c
@@ -144,7 +144,7 @@ static int lock_file()
int fd, try = 0;
retry:
- fd = open(LOCKFILE, O_CREAT|O_CLOEXEC, 00600);
+ fd = open(LOCKFILE, O_CREAT|O_WRONLY|O_CLOEXEC, 00600);
if (fd < 0) {
if (try == 1 || mkdir(dirname(pathbuf), 00700))
return -2;
--
2.30.2
