K 10
svn:author
V 8
rmacklem
K 8
svn:date
V 27
2021-05-12T02:44:05.563247Z
K 7
svn:log
V 798
nfscl: add check for NULL clp and forced dismounts to nfscl_delegreturnvp()

Commit aad780464fad added a function called nfscl_delegreturnvp()
to return delegations during the NFS VOP_RECLAIM().
The function erroneously assumed that nm_clp would
be non-NULL. It will be NULL for NFSV4.0 mounts until
a regular file is opened. It will also be NULL during
vflush() in nfs_unmount() for a forced dismount.

This patch adds a check for clp == NULL to fix this.

Also, since it makes no sense to call nfscl_delegreturnvp()
during a forced dismount, the patch adds a check for that
case and does not do the call during forced dismounts.

PR:	255436
(cherry picked from commit f6fec55fe30088bbefd3efe70b62565399a7b9b8)

Git Hash:   8686e00fdfac505cded6d8f4a4bcf8e51fc10349
Git Author: rmacklem@FreeBSD.org
END