diff options
| -rw-r--r-- | sys/fs/nullfs/null_vnops.c | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/sys/fs/nullfs/null_vnops.c b/sys/fs/nullfs/null_vnops.c index 6cb2279..f2261f9 100644 --- a/sys/fs/nullfs/null_vnops.c +++ b/sys/fs/nullfs/null_vnops.c @@ -683,16 +683,40 @@ null_print(struct vop_print_args *ap) return (0); } +/* ARGSUSED */ +static int +null_getwritemount(struct vop_getwritemount_args *ap) +{ + struct null_node *xp; + struct vnode *lowervp; + struct vnode *vp; + + vp = ap->a_vp; + VI_LOCK(vp); + xp = VTONULL(vp); + if (xp && (lowervp = xp->null_lowervp)) { + VI_LOCK_FLAGS(lowervp, MTX_DUPOK); + VI_UNLOCK(vp); + vholdl(lowervp); + VI_UNLOCK(lowervp); + VOP_GETWRITEMOUNT(lowervp, ap->a_mpp); + vdrop(lowervp); + } else { + VI_UNLOCK(vp); + *(ap->a_mpp) = NULL; + } + return (0); +} + /* * Global vfs data structures */ struct vop_vector null_vnodeops = { .vop_bypass = null_bypass, - .vop_access = null_access, .vop_bmap = VOP_EOPNOTSUPP, .vop_getattr = null_getattr, - .vop_getwritemount = vop_stdgetwritemount, + .vop_getwritemount = null_getwritemount, .vop_inactive = null_inactive, .vop_islocked = null_islocked, .vop_lock = null_lock, |
