cvs commit: src/sys/nfsclient nfs_lock.c
kris at obsecurity.org
Wed Mar 26 22:50:24 PST 2003
On Wed, Mar 26, 2003 at 11:21:34AM -0800, Robert Watson wrote:
> rwatson 2003/03/26 11:21:34 PST
> FreeBSD src repository
> Modified files:
> sys/nfsclient nfs_lock.c
> Add O_NONBLOCK to the vn_open_cred() flags for NFS client locking when
> opening the POSIX fifo; convert ENXIO error returns to EOPNOTSUPP.
> This improves handling of the case where the /var/run/lock fifo exists
> but there is no listener: we immediately return EOPNOTSUPP rather
> than blocking until a listener turns up. This could occur during a
> diskless boot before rpc.lockd is loaded, or if the lock file persists
> across a reboot following the disabling of rpc.lockd. This may have
> suddenly started to occur due to fifo blocking fixes--previously it
> looks like attempts to read on a fifo with no listener would time out
> due to insufficient resources.
Thanks, this sounds like it may fix non-blocking calls to open() on a
NFS file, which would previously block.
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