diff options
Diffstat (limited to 'sys/miscfs/kernfs/kernfs_vnops.c')
| -rw-r--r-- | sys/miscfs/kernfs/kernfs_vnops.c | 24 |
1 files changed, 16 insertions, 8 deletions
diff --git a/sys/miscfs/kernfs/kernfs_vnops.c b/sys/miscfs/kernfs/kernfs_vnops.c index 269c0842653..3db0fadc84e 100644 --- a/sys/miscfs/kernfs/kernfs_vnops.c +++ b/sys/miscfs/kernfs/kernfs_vnops.c @@ -1,4 +1,4 @@ -/* $OpenBSD: kernfs_vnops.c,v 1.28 2002/10/12 02:03:46 krw Exp $ */ +/* $OpenBSD: kernfs_vnops.c,v 1.29 2003/01/31 17:37:50 art Exp $ */ /* $NetBSD: kernfs_vnops.c,v 1.43 1996/03/16 23:52:47 christos Exp $ */ /* @@ -287,7 +287,6 @@ kernfs_freevp(vp, p) struct kernfs_node *kf = VTOKERN(vp); TAILQ_REMOVE(&kfshead, kf, list); - VOP_UNLOCK(vp, 0, p); FREE(vp->v_data, M_TEMP); vp->v_data = 0; return(0); @@ -487,15 +486,16 @@ kernfs_lookup(v) struct proc *p = cnp->cn_proc; struct kern_target *kt; struct vnode *vp; - int error; + int error, wantpunlock; #ifdef KERNFS_DIAGNOSTIC printf("kernfs_lookup(%p)\n", ap); printf("kernfs_lookup(dp = %p, vpp = %p, cnp = %p)\n", dvp, vpp, ap->a_cnp); printf("kernfs_lookup(%s)\n", pname); #endif - VOP_UNLOCK(dvp, 0, p); + *vpp = NULLVP; + cnp->cn_flags &= ~PDIRUNLOCK; if (cnp->cn_nameiop == DELETE || cnp->cn_nameiop == RENAME) return (EROFS); @@ -503,14 +503,14 @@ kernfs_lookup(v) if (cnp->cn_namelen == 1 && *pname == '.') { *vpp = dvp; VREF(dvp); - vn_lock(dvp, LK_SHARED | LK_RETRY, p); return (0); } + wantpunlock = (~cnp->cn_flags & (LOCKPARENT | ISLASTCN)); + kt = kernfs_findtarget(pname, cnp->cn_namelen); if (kt == NULL) { /* not found */ - vn_lock(dvp, LK_SHARED | LK_RETRY, p); return(cnp->cn_nameiop == LOOKUP ? ENOENT : EROFS); } @@ -524,17 +524,25 @@ kernfs_lookup(v) *vpp = vp; if (vget(vp, LK_EXCLUSIVE, p)) goto loop; + if (wantpunlock) { + VOP_UNLOCK(dvp, 0, p); + cnp->cn_flags |= PDIRUNLOCK; + } return(0); } if ((error = kernfs_allocvp(kt, dvp->v_mount, vpp)) != 0) { - vn_lock(dvp, LK_SHARED | LK_RETRY, p); return(error); } vn_lock(*vpp, LK_SHARED | LK_RETRY, p); - return(error); + + if (wantpunlock) { + VOP_UNLOCK(dvp, 0, p); + cnp->cn_flags |= PDIRUNLOCK; + } + return (0); } /*ARGSUSED*/ |