diff options
Diffstat (limited to 'sys/nfs/nfs_common.c')
| -rw-r--r-- | sys/nfs/nfs_common.c | 55 |
1 files changed, 54 insertions, 1 deletions
diff --git a/sys/nfs/nfs_common.c b/sys/nfs/nfs_common.c index 9b2ef800780c..f28136087602 100644 --- a/sys/nfs/nfs_common.c +++ b/sys/nfs/nfs_common.c @@ -34,7 +34,7 @@ * SUCH DAMAGE. * * @(#)nfs_subs.c 8.3 (Berkeley) 1/4/94 - * $Id: nfs_subs.c,v 1.6 1994/10/02 17:27:01 phk Exp $ + * $Id: nfs_subs.c,v 1.7 1994/10/17 17:47:37 phk Exp $ */ /* @@ -995,6 +995,7 @@ nfs_namei(ndp, fhp, len, slp, nam, mdp, dposp, p) */ if (cnp->cn_flags & (SAVENAME | SAVESTART)) { cnp->cn_flags |= HASBUF; + nfsrv_vmio( ndp->ni_vp); return (0); } out: @@ -1123,6 +1124,7 @@ nfsrv_fhtovp(fhp, lockflag, vpp, cred, slp, nam, rdonlyp) *rdonlyp = 0; if (!lockflag) VOP_UNLOCK(*vpp); + nfsrv_vmio(*vpp); return (0); } @@ -1168,3 +1170,54 @@ netaddr_match(family, haddr, nam) }; return (0); } + +int +nfsrv_vmio( struct vnode *vp) { + int rtval; + vm_object_t object; + vm_pager_t pager; + + if( (vp == NULL) || (vp->v_type != VREG)) + return 1; + +retry: + if( (vp->v_flag & VVMIO) == 0) { + pager = (vm_pager_t) vnode_pager_alloc(vp, 0, 0, 0); + object = (vm_object_t) vp->v_vmdata; + if( object->pager != pager) + panic("nfsrv_vmio: pager/object mismatch"); + (void) vm_object_lookup( pager); + pager_cache( object, TRUE); + vp->v_flag |= VVMIO; + } else { + if( (object = (vm_object_t)vp->v_vmdata) && + (object->flags & OBJ_DEAD)) { + tsleep( (caddr_t) object, PVM, "nfdead", 0); + goto retry; + } + if( !object) + panic("nfsrv_vmio: VMIO object missing"); + pager = object->pager; + if( !pager) + panic("nfsrv_vmio: VMIO pager missing"); + (void) vm_object_lookup( pager); + } + return 0; +} +int +nfsrv_vput( struct vnode *vp) { + if( (vp->v_flag & VVMIO) && vp->v_vmdata) { + vm_object_deallocate( (vm_object_t) vp->v_vmdata); + } + vput( vp); + return 0; +} +int +nfsrv_vrele( struct vnode *vp) { + if( (vp->v_flag & VVMIO) && vp->v_vmdata) { + vm_object_deallocate( (vm_object_t) vp->v_vmdata); + } + vrele( vp); + return 0; +} + |