| author | szhou |
| Tue, 05 Sep 2006 20:30:13 -0700 | |
| changeset 2679 | 39fc2aead8db |
| parent 2621 | 4ea88858d952 |
| child 2729 | aeda30620271 |
| permissions | -rw-r--r-- |
| 2621 | 1 |
/* |
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* CDDL HEADER START |
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* |
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* The contents of this file are subject to the terms of the |
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* Common Development and Distribution License (the "License"). |
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* You may not use this file except in compliance with the License. |
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* |
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE |
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* or http://www.opensolaris.org/os/licensing. |
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* See the License for the specific language governing permissions |
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* and limitations under the License. |
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* |
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* When distributing Covered Code, include this CDDL HEADER in each |
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE. |
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* If applicable, add the following below this CDDL HEADER, with the |
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* fields enclosed by brackets "[]" replaced with your own identifying |
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* information: Portions Copyright [yyyy] [name of copyright owner] |
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* |
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* CDDL HEADER END |
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*/ |
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/* |
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* Copyright 2006 Sun Microsystems, Inc. All rights reserved. |
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* Use is subject to license terms. |
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*/ |
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||
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#pragma ident "%Z%%M% %I% %E% SMI" |
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||
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/* |
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* vnode ops for the /dev filesystem |
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* |
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* - VDIR, VCHR, CBLK, and VLNK are considered must supported files |
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* - VREG and VDOOR are used for some internal implementations in |
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* the global zone, e.g. devname and devfsadm communication |
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* - other file types are unusual in this namespace and |
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* not supported for now |
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*/ |
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||
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#include <sys/types.h> |
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#include <sys/param.h> |
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#include <sys/t_lock.h> |
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#include <sys/systm.h> |
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#include <sys/sysmacros.h> |
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#include <sys/user.h> |
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#include <sys/time.h> |
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#include <sys/vfs.h> |
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#include <sys/vnode.h> |
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#include <sys/file.h> |
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#include <sys/fcntl.h> |
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#include <sys/flock.h> |
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#include <sys/kmem.h> |
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#include <sys/uio.h> |
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#include <sys/errno.h> |
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#include <sys/stat.h> |
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#include <sys/cred.h> |
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#include <sys/cred_impl.h> |
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#include <sys/dirent.h> |
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#include <sys/pathname.h> |
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#include <sys/cmn_err.h> |
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#include <sys/debug.h> |
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#include <sys/policy.h> |
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#include <vm/hat.h> |
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#include <vm/seg_vn.h> |
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#include <vm/seg_map.h> |
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#include <vm/seg.h> |
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#include <vm/as.h> |
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#include <vm/page.h> |
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#include <sys/proc.h> |
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#include <sys/mode.h> |
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#include <sys/sunndi.h> |
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#include <sys/ptms.h> |
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#include <fs/fs_subr.h> |
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#include <sys/fs/dv_node.h> |
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#include <sys/fs/sdev_impl.h> |
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#include <sys/fs/sdev_node.h> |
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||
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/*ARGSUSED*/ |
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static int |
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sdev_open(struct vnode **vpp, int flag, struct cred *cred) |
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{
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struct sdev_node *dv = VTOSDEV(*vpp); |
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struct sdev_node *ddv = dv->sdev_dotdot; |
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int error = 0; |
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||
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if ((*vpp)->v_type == VDIR) |
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return (0); |
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||
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if (!SDEV_IS_GLOBAL(dv)) |
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return (ENOTSUP); |
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||
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ASSERT((*vpp)->v_type == VREG); |
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if ((*vpp)->v_type != VREG) |
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return (ENOTSUP); |
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||
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ASSERT(ddv); |
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rw_enter(&ddv->sdev_contents, RW_READER); |
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if (dv->sdev_attrvp == NULL) {
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rw_exit(&ddv->sdev_contents); |
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return (ENOENT); |
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} |
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error = VOP_OPEN(&(dv->sdev_attrvp), flag, cred); |
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rw_exit(&ddv->sdev_contents); |
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return (error); |
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} |
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||
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/*ARGSUSED1*/ |
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static int |
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sdev_close(struct vnode *vp, int flag, int count, |
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offset_t offset, struct cred *cred) |
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{
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struct sdev_node *dv = VTOSDEV(vp); |
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||
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if (vp->v_type == VDIR) {
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cleanlocks(vp, ttoproc(curthread)->p_pid, 0); |
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cleanshares(vp, ttoproc(curthread)->p_pid); |
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return (0); |
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} |
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||
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if (!SDEV_IS_GLOBAL(dv)) |
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return (ENOTSUP); |
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||
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ASSERT(vp->v_type == VREG); |
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if (vp->v_type != VREG) |
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return (ENOTSUP); |
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||
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ASSERT(dv->sdev_attrvp); |
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return (VOP_CLOSE(dv->sdev_attrvp, flag, count, offset, cred)); |
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} |
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||
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/*ARGSUSED*/ |
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static int |
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sdev_read(struct vnode *vp, struct uio *uio, int ioflag, struct cred *cred, |
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struct caller_context *ct) |
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{
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struct sdev_node *dv = (struct sdev_node *)VTOSDEV(vp); |
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int error; |
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||
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if (!SDEV_IS_GLOBAL(dv)) |
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return (EINVAL); |
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||
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if (vp->v_type == VDIR) |
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return (EISDIR); |
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||
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/* only supporting regular files in /dev */ |
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ASSERT(vp->v_type == VREG); |
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if (vp->v_type != VREG) |
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return (EINVAL); |
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||
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ASSERT(RW_READ_HELD(&VTOSDEV(vp)->sdev_contents)); |
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ASSERT(dv->sdev_attrvp); |
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(void) VOP_RWLOCK(dv->sdev_attrvp, 0, NULL); |
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error = VOP_READ(dv->sdev_attrvp, uio, ioflag, cred, ct); |
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VOP_RWUNLOCK(dv->sdev_attrvp, 0, NULL); |
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return (error); |
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} |
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||
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/*ARGSUSED*/ |
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static int |
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sdev_write(struct vnode *vp, struct uio *uio, int ioflag, struct cred *cred, |
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struct caller_context *ct) |
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{
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struct sdev_node *dv = VTOSDEV(vp); |
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int error = 0; |
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if (!SDEV_IS_GLOBAL(dv)) |
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return (EINVAL); |
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||
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if (vp->v_type == VDIR) |
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return (EISDIR); |
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||
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/* only supporting regular files in /dev */ |
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ASSERT(vp->v_type == VREG); |
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if (vp->v_type != VREG) |
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return (EINVAL); |
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ASSERT(dv->sdev_attrvp); |
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(void) VOP_RWLOCK(dv->sdev_attrvp, 1, NULL); |
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error = VOP_WRITE(dv->sdev_attrvp, uio, ioflag, cred, ct); |
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VOP_RWUNLOCK(dv->sdev_attrvp, 1, NULL); |
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if (error == 0) {
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sdev_update_timestamps(dv->sdev_attrvp, kcred, |
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AT_MTIME); |
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} |
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return (error); |
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} |
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||
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/*ARGSUSED*/ |
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static int |
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sdev_ioctl(struct vnode *vp, int cmd, intptr_t arg, int flag, |
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struct cred *cred, int *rvalp) |
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{
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struct sdev_node *dv = VTOSDEV(vp); |
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if (!SDEV_IS_GLOBAL(dv) || (vp->v_type == VDIR)) |
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return (ENOTTY); |
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ASSERT(vp->v_type == VREG); |
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if (vp->v_type != VREG) |
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return (EINVAL); |
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ASSERT(dv->sdev_attrvp); |
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return (VOP_IOCTL(dv->sdev_attrvp, cmd, arg, flag, cred, rvalp)); |
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} |
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static int |
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sdev_getattr(struct vnode *vp, struct vattr *vap, int flags, struct cred *cr) |
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{
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int error = 0; |
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struct sdev_node *dv = VTOSDEV(vp); |
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struct sdev_node *parent = dv->sdev_dotdot; |
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struct devname_nsmap *map = NULL; |
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struct devname_ops *dirops = NULL; |
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int (*fn)(devname_handle_t *, struct vattr *, struct cred *); |
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ASSERT(parent); |
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rw_enter(&parent->sdev_contents, RW_READER); |
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ASSERT(dv->sdev_attr || dv->sdev_attrvp); |
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if (SDEV_IS_GLOBAL(dv) && (dv->sdev_state != SDEV_ZOMBIE)) {
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map = sdev_get_map(parent, 0); |
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dirops = map ? map->dir_ops : NULL; |
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} |
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||
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/* |
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* search order: |
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* - for persistent nodes (SDEV_PERSIST): backstore |
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* - for non-persistent nodes: module ops if global, then memory |
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*/ |
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if (dv->sdev_attrvp) {
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rw_exit(&parent->sdev_contents); |
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error = VOP_GETATTR(dv->sdev_attrvp, vap, flags, cr); |
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sdev_vattr_merge(dv, vap); |
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} else if (dirops && (fn = dirops->devnops_getattr)) {
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sdev_vattr_merge(dv, vap); |
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rw_exit(&parent->sdev_contents); |
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error = (*fn)(&(dv->sdev_handle), vap, cr); |
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} else {
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ASSERT(dv->sdev_attr); |
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*vap = *dv->sdev_attr; |
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sdev_vattr_merge(dv, vap); |
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rw_exit(&parent->sdev_contents); |
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} |
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||
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return (error); |
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} |
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||
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static int |
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sdev_setattr(struct vnode *vp, struct vattr *vap, int flags, struct cred *cred) |
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{
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return (devname_setattr_func(vp, vap, flags, cred, NULL, 0)); |
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} |
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||
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static int |
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sdev_getsecattr(struct vnode *vp, struct vsecattr *vsap, int flags, |
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struct cred *cr) |
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{
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int error; |
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struct sdev_node *dv = VTOSDEV(vp); |
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struct vnode *avp = dv->sdev_attrvp; |
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||
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if (avp == NULL) {
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/* return fs_fab_acl() if flavor matches, else do nothing */ |
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if ((SDEV_ACL_FLAVOR(vp) == _ACL_ACLENT_ENABLED && |
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(vsap->vsa_mask & (VSA_ACLCNT | VSA_DFACLCNT))) || |
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(SDEV_ACL_FLAVOR(vp) == _ACL_ACE_ENABLED && |
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(vsap->vsa_mask & (VSA_ACECNT | VSA_ACE)))) |
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return (fs_fab_acl(vp, vsap, flags, cr)); |
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return (ENOSYS); |
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} |
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||
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(void) VOP_RWLOCK(avp, 1, NULL); |
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error = VOP_GETSECATTR(avp, vsap, flags, cr); |
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VOP_RWUNLOCK(avp, 1, NULL); |
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return (error); |
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} |
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||
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static int |
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sdev_setsecattr(struct vnode *vp, struct vsecattr *vsap, int flags, |
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struct cred *cr) |
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{
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int error; |
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struct sdev_node *dv = VTOSDEV(vp); |
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struct vnode *avp = dv->sdev_attrvp; |
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285 |
||
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if (dv->sdev_state == SDEV_ZOMBIE) |
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return (0); |
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288 |
||
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if (avp == NULL) {
|
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if (SDEV_IS_GLOBAL(dv) && !SDEV_IS_PERSIST(dv)) |
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return (fs_nosys()); |
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292 |
||
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ASSERT(dv->sdev_attr); |
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/* |
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* if coming in directly, the acl system call will |
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* have held the read-write lock via VOP_RWLOCK() |
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* If coming in via specfs, specfs will have |
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* held the rw lock on the realvp i.e. us. |
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*/ |
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ASSERT(RW_WRITE_HELD(&dv->sdev_contents)); |
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sdev_vattr_merge(dv, dv->sdev_attr); |
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error = sdev_shadow_node(dv, cr); |
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if (error) {
|
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return (fs_nosys()); |
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} |
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306 |
||
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ASSERT(dv->sdev_attrvp); |
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/* clean out the memory copy if any */ |
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309 |
if (dv->sdev_attr) {
|
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kmem_free(dv->sdev_attr, sizeof (struct vattr)); |
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dv->sdev_attr = NULL; |
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} |
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avp = dv->sdev_attrvp; |
|
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} |
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ASSERT(avp); |
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316 |
||
317 |
(void) VOP_RWLOCK(avp, V_WRITELOCK_TRUE, NULL); |
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318 |
error = VOP_SETSECATTR(avp, vsap, flags, cr); |
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VOP_RWUNLOCK(avp, V_WRITELOCK_TRUE, NULL); |
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320 |
return (error); |
|
321 |
} |
|
322 |
||
323 |
int |
|
324 |
sdev_unlocked_access(void *vdv, int mode, struct cred *cr) |
|
325 |
{
|
|
326 |
struct sdev_node *dv = vdv; |
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327 |
int shift = 0; |
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328 |
uid_t owner = dv->sdev_attr->va_uid; |
|
329 |
||
330 |
if (crgetuid(cr) != owner) {
|
|
331 |
shift += 3; |
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332 |
if (groupmember(dv->sdev_attr->va_gid, cr) == 0) |
|
333 |
shift += 3; |
|
334 |
} |
|
335 |
||
336 |
mode &= ~(dv->sdev_attr->va_mode << shift); |
|
337 |
if (mode == 0) |
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338 |
return (0); |
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339 |
||
340 |
return (secpolicy_vnode_access(cr, SDEVTOV(dv), owner, mode)); |
|
341 |
} |
|
342 |
||
343 |
static int |
|
344 |
sdev_access(struct vnode *vp, int mode, int flags, struct cred *cr) |
|
345 |
{
|
|
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struct sdev_node *dv = VTOSDEV(vp); |
|
347 |
int ret = 0; |
|
348 |
||
349 |
ASSERT(dv->sdev_attr || dv->sdev_attrvp); |
|
350 |
||
351 |
if (dv->sdev_attrvp) {
|
|
352 |
ret = VOP_ACCESS(dv->sdev_attrvp, mode, flags, cr); |
|
353 |
} else if (dv->sdev_attr) {
|
|
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rw_enter(&dv->sdev_contents, RW_READER); |
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355 |
ret = sdev_unlocked_access(dv, mode, cr); |
|
356 |
if (ret) |
|
357 |
ret = EACCES; |
|
358 |
rw_exit(&dv->sdev_contents); |
|
359 |
} |
|
360 |
||
361 |
return (ret); |
|
362 |
} |
|
363 |
||
364 |
/* |
|
365 |
* Lookup |
|
366 |
*/ |
|
367 |
/*ARGSUSED3*/ |
|
368 |
static int |
|
369 |
sdev_lookup(struct vnode *dvp, char *nm, struct vnode **vpp, |
|
370 |
struct pathname *pnp, int flags, struct vnode *rdir, struct cred *cred) |
|
371 |
{
|
|
372 |
struct sdev_node *parent; |
|
373 |
||
374 |
parent = VTOSDEV(dvp); |
|
375 |
ASSERT(parent); |
|
376 |
||
377 |
if (!SDEV_IS_GLOBAL(parent)) |
|
378 |
return (prof_lookup(dvp, nm, vpp, cred)); |
|
379 |
return (devname_lookup_func(parent, nm, vpp, cred, NULL, 0)); |
|
380 |
} |
|
381 |
||
382 |
/*ARGSUSED2*/ |
|
383 |
static int |
|
384 |
sdev_create(struct vnode *dvp, char *nm, struct vattr *vap, vcexcl_t excl, |
|
385 |
int mode, struct vnode **vpp, struct cred *cred, int flag) |
|
386 |
{
|
|
387 |
struct vnode *vp = NULL; |
|
388 |
struct vnode *avp; |
|
389 |
struct sdev_node *parent; |
|
390 |
struct sdev_node *self = NULL; |
|
391 |
int error = 0; |
|
392 |
vtype_t type = vap->va_type; |
|
393 |
||
394 |
ASSERT(vap->va_type != VNON && |
|
395 |
vap->va_type != VBAD); |
|
396 |
||
397 |
if ((type == VFIFO) || (type == VSOCK) || |
|
398 |
(type == VPROC) || (type == VPORT)) |
|
399 |
return (ENOTSUP); |
|
400 |
||
401 |
parent = VTOSDEV(dvp); |
|
402 |
ASSERT(parent); |
|
403 |
||
404 |
rw_enter(&parent->sdev_dotdot->sdev_contents, RW_READER); |
|
405 |
if (parent->sdev_state == SDEV_ZOMBIE) {
|
|
406 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
407 |
return (ENOENT); |
|
408 |
} |
|
409 |
||
410 |
/* non-global do not allow pure node creation */ |
|
411 |
if (!SDEV_IS_GLOBAL(parent)) {
|
|
412 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
413 |
return (prof_lookup(dvp, nm, vpp, cred)); |
|
414 |
} |
|
415 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
416 |
||
417 |
again: |
|
418 |
/* check existing name */ |
|
419 |
error = VOP_LOOKUP(dvp, nm, &vp, NULL, 0, NULL, cred); |
|
420 |
||
421 |
/* name found */ |
|
422 |
if (error == 0) {
|
|
423 |
ASSERT(vp); |
|
424 |
if (excl == EXCL) {
|
|
425 |
error = EEXIST; |
|
426 |
} else if ((vp->v_type == VDIR) && (mode & VWRITE)) {
|
|
427 |
/* allowing create/read-only an existing directory */ |
|
428 |
error = EISDIR; |
|
429 |
} else {
|
|
430 |
error = VOP_ACCESS(vp, mode, flag, cred); |
|
431 |
} |
|
432 |
||
433 |
if (error) {
|
|
434 |
VN_RELE(vp); |
|
435 |
return (error); |
|
436 |
} |
|
437 |
||
438 |
/* truncation first */ |
|
439 |
if ((vp->v_type == VREG) && (vap->va_mask & AT_SIZE) && |
|
440 |
(vap->va_size == 0)) {
|
|
441 |
ASSERT(parent->sdev_attrvp); |
|
442 |
ASSERT(VTOSDEV(vp)->sdev_attrvp); |
|
443 |
error = VOP_CREATE(parent->sdev_attrvp, |
|
444 |
nm, vap, excl, mode, &avp, cred, flag); |
|
445 |
||
446 |
if (error) {
|
|
447 |
VN_RELE(vp); |
|
448 |
return (error); |
|
449 |
} |
|
450 |
} |
|
451 |
||
452 |
sdev_update_timestamps(vp, kcred, |
|
453 |
AT_CTIME|AT_MTIME|AT_ATIME); |
|
454 |
*vpp = vp; |
|
455 |
return (0); |
|
456 |
} |
|
457 |
||
458 |
/* bail out early */ |
|
459 |
if (error != ENOENT) |
|
460 |
return (error); |
|
461 |
||
462 |
/* |
|
463 |
* For memory-based (ROFS) directory: |
|
464 |
* - either disallow node creation; |
|
465 |
* - or implement VOP_CREATE of its own |
|
466 |
*/ |
|
467 |
rw_enter(&parent->sdev_contents, RW_WRITER); |
|
468 |
if (!SDEV_IS_PERSIST(parent)) {
|
|
469 |
rw_exit(&parent->sdev_contents); |
|
470 |
return (ENOTSUP); |
|
471 |
} |
|
472 |
ASSERT(parent->sdev_attrvp); |
|
473 |
error = sdev_mknode(parent, nm, &self, vap, NULL, NULL, |
|
474 |
cred, SDEV_READY); |
|
475 |
if (error) {
|
|
476 |
rw_exit(&parent->sdev_contents); |
|
477 |
if (self) |
|
478 |
SDEV_RELE(self); |
|
479 |
return (error); |
|
480 |
} |
|
481 |
rw_exit(&parent->sdev_contents); |
|
482 |
||
483 |
ASSERT(self); |
|
484 |
/* take care the timestamps for the node and its parent */ |
|
485 |
sdev_update_timestamps(SDEVTOV(self), kcred, |
|
486 |
AT_CTIME|AT_MTIME|AT_ATIME); |
|
487 |
sdev_update_timestamps(dvp, kcred, AT_MTIME|AT_ATIME); |
|
488 |
if (SDEV_IS_GLOBAL(parent)) |
|
489 |
atomic_inc_ulong(&parent->sdev_gdir_gen); |
|
490 |
||
491 |
/* wake up other threads blocked on looking up this node */ |
|
492 |
mutex_enter(&self->sdev_lookup_lock); |
|
493 |
SDEV_UNBLOCK_OTHERS(self, SDEV_LOOKUP); |
|
494 |
mutex_exit(&self->sdev_lookup_lock); |
|
495 |
error = sdev_to_vp(self, vpp); |
|
496 |
return (error); |
|
497 |
} |
|
498 |
||
499 |
static int |
|
500 |
sdev_remove(struct vnode *dvp, char *nm, struct cred *cred) |
|
501 |
{
|
|
502 |
int error; |
|
503 |
struct sdev_node *parent = (struct sdev_node *)VTOSDEV(dvp); |
|
504 |
struct vnode *vp = NULL; |
|
505 |
struct sdev_node *dv = NULL; |
|
506 |
struct devname_nsmap *map = NULL; |
|
507 |
struct devname_ops *dirops = NULL; |
|
508 |
int (*fn)(devname_handle_t *); |
|
509 |
int len; |
|
510 |
int bkstore = 0; |
|
511 |
||
512 |
/* bail out early */ |
|
513 |
len = strlen(nm); |
|
514 |
if (nm[0] == '.') {
|
|
515 |
if (len == 1) {
|
|
516 |
return (EINVAL); |
|
517 |
} else if (len == 2 && nm[1] == '.') {
|
|
518 |
return (EEXIST); |
|
519 |
} |
|
520 |
} |
|
521 |
||
522 |
ASSERT(parent); |
|
523 |
rw_enter(&parent->sdev_contents, RW_READER); |
|
524 |
if (!SDEV_IS_GLOBAL(parent)) {
|
|
525 |
rw_exit(&parent->sdev_contents); |
|
526 |
return (ENOTSUP); |
|
527 |
} |
|
528 |
||
529 |
/* check existence first */ |
|
530 |
dv = sdev_cache_lookup(parent, nm); |
|
531 |
if (dv == NULL) {
|
|
532 |
rw_exit(&parent->sdev_contents); |
|
533 |
return (ENOENT); |
|
534 |
} |
|
535 |
||
536 |
vp = SDEVTOV(dv); |
|
537 |
if ((dv->sdev_state == SDEV_INIT) || |
|
538 |
(dv->sdev_state == SDEV_ZOMBIE)) {
|
|
539 |
rw_exit(&parent->sdev_contents); |
|
540 |
VN_RELE(vp); |
|
541 |
return (ENOENT); |
|
542 |
} |
|
543 |
||
544 |
/* the module may record/reject removing a device node */ |
|
545 |
map = sdev_get_map(parent, 0); |
|
546 |
dirops = map ? map->dir_ops : NULL; |
|
547 |
if (dirops && ((fn = dirops->devnops_remove) != NULL)) {
|
|
548 |
error = (*fn)(&(dv->sdev_handle)); |
|
549 |
if (error) {
|
|
550 |
rw_exit(&parent->sdev_contents); |
|
551 |
VN_RELE(vp); |
|
552 |
return (error); |
|
553 |
} |
|
554 |
} |
|
555 |
||
556 |
/* |
|
557 |
* sdev_dirdelete does the real job of: |
|
558 |
* - make sure no open ref count |
|
559 |
* - destroying the sdev_node |
|
560 |
* - releasing the hold on attrvp |
|
561 |
*/ |
|
562 |
bkstore = SDEV_IS_PERSIST(dv) ? 1 : 0; |
|
563 |
if (!rw_tryupgrade(&parent->sdev_contents)) {
|
|
564 |
rw_exit(&parent->sdev_contents); |
|
565 |
rw_enter(&parent->sdev_contents, RW_WRITER); |
|
566 |
} |
|
567 |
error = sdev_cache_update(parent, &dv, nm, SDEV_CACHE_DELETE); |
|
568 |
rw_exit(&parent->sdev_contents); |
|
569 |
||
570 |
sdcmn_err2(("sdev_remove: cache_update error %d\n", error));
|
|
571 |
if (error && (error != EBUSY)) {
|
|
572 |
/* report errors other than EBUSY */ |
|
573 |
VN_RELE(vp); |
|
574 |
} else {
|
|
575 |
sdcmn_err2(("sdev_remove: cleaning node %s from cache "
|
|
576 |
" with error %d\n", nm, error)); |
|
577 |
||
578 |
/* |
|
579 |
* best efforts clean up the backing store |
|
580 |
*/ |
|
581 |
if (bkstore) {
|
|
582 |
ASSERT(parent->sdev_attrvp); |
|
583 |
error = VOP_REMOVE(parent->sdev_attrvp, nm, cred); |
|
584 |
/* |
|
585 |
* do not report BUSY error |
|
586 |
* because the backing store ref count is released |
|
587 |
* when the last ref count on the sdev_node is |
|
588 |
* released. |
|
589 |
*/ |
|
590 |
if (error == EBUSY) {
|
|
591 |
sdcmn_err2(("sdev_remove: device %s is still on"
|
|
592 |
"disk %s\n", nm, parent->sdev_path)); |
|
593 |
error = 0; |
|
594 |
} |
|
595 |
} |
|
596 |
||
597 |
if (error == EBUSY) |
|
598 |
error = 0; |
|
599 |
} |
|
600 |
||
601 |
return (error); |
|
602 |
} |
|
603 |
||
604 |
/* |
|
605 |
* Some restrictions for this file system: |
|
606 |
* - both oldnm and newnm are in the scope of /dev file system, |
|
607 |
* to simply the namespace management model. |
|
608 |
*/ |
|
609 |
static int |
|
610 |
sdev_rename(struct vnode *odvp, char *onm, struct vnode *ndvp, char *nnm, |
|
611 |
struct cred *cred) |
|
612 |
{
|
|
613 |
struct sdev_node *fromparent = NULL; |
|
614 |
struct vattr vattr; |
|
615 |
struct sdev_node *toparent; |
|
616 |
struct sdev_node *fromdv = NULL; /* source node */ |
|
617 |
struct vnode *ovp; /* source vnode */ |
|
618 |
struct sdev_node *todv = NULL; /* destination node */ |
|
619 |
struct vnode *nvp; /* destination vnode */ |
|
620 |
int samedir = 0; /* set if odvp == ndvp */ |
|
621 |
struct vnode *realvp; |
|
622 |
int len; |
|
623 |
char nnm_path[MAXPATHLEN]; |
|
624 |
struct devname_nsmap *omap = NULL; |
|
625 |
struct devname_ops *odirops = NULL; |
|
626 |
int (*fn)(devname_handle_t *, char *); |
|
627 |
int (*rmfn)(devname_handle_t *); |
|
628 |
int error = 0; |
|
629 |
dev_t fsid; |
|
630 |
int bkstore = 0; |
|
631 |
||
632 |
/* prevent modifying "." and ".." */ |
|
633 |
if ((onm[0] == '.' && |
|
634 |
(onm[1] == '\0' || (onm[1] == '.' && onm[2] == '\0')))) {
|
|
635 |
return (EINVAL); |
|
636 |
} |
|
637 |
||
638 |
fromparent = VTOSDEV(odvp); |
|
639 |
toparent = VTOSDEV(ndvp); |
|
640 |
||
641 |
/* ZOMBIE parent doesn't allow new node creation */ |
|
642 |
rw_enter(&fromparent->sdev_dotdot->sdev_contents, RW_READER); |
|
643 |
if (fromparent->sdev_state == SDEV_ZOMBIE) {
|
|
644 |
rw_exit(&fromparent->sdev_dotdot->sdev_contents); |
|
645 |
return (ENOENT); |
|
646 |
} |
|
647 |
||
648 |
/* renaming only supported for global device nodes */ |
|
649 |
if (!SDEV_IS_GLOBAL(fromparent)) {
|
|
650 |
rw_exit(&fromparent->sdev_dotdot->sdev_contents); |
|
651 |
return (ENOTSUP); |
|
652 |
} |
|
653 |
rw_exit(&fromparent->sdev_dotdot->sdev_contents); |
|
654 |
||
655 |
rw_enter(&toparent->sdev_dotdot->sdev_contents, RW_READER); |
|
656 |
if (toparent->sdev_state == SDEV_ZOMBIE) {
|
|
657 |
rw_exit(&toparent->sdev_dotdot->sdev_contents); |
|
658 |
return (ENOENT); |
|
659 |
} |
|
660 |
rw_exit(&toparent->sdev_dotdot->sdev_contents); |
|
661 |
||
662 |
/* check existence of the source node */ |
|
663 |
error = VOP_LOOKUP(odvp, onm, &ovp, NULL, 0, NULL, cred); |
|
664 |
if (error) {
|
|
665 |
sdcmn_err2(("sdev_rename: the source node %s exists\n",
|
|
666 |
onm)); |
|
667 |
return (error); |
|
668 |
} |
|
669 |
||
670 |
if (VOP_REALVP(ovp, &realvp) == 0) {
|
|
671 |
VN_HOLD(realvp); |
|
672 |
VN_RELE(ovp); |
|
673 |
ovp = realvp; |
|
674 |
} |
|
675 |
||
676 |
/* check existence of destination */ |
|
677 |
error = VOP_LOOKUP(ndvp, nnm, &nvp, NULL, 0, NULL, cred); |
|
678 |
if (error && (error != ENOENT)) {
|
|
679 |
VN_RELE(ovp); |
|
680 |
return (error); |
|
681 |
} |
|
682 |
||
683 |
if (nvp && (VOP_REALVP(nvp, &realvp) == 0)) {
|
|
684 |
VN_HOLD(realvp); |
|
685 |
VN_RELE(nvp); |
|
686 |
nvp = realvp; |
|
687 |
} |
|
688 |
||
689 |
/* |
|
690 |
* For now, if both exist, they must be the same type. |
|
691 |
* Changing the type of a node probably needs some special |
|
692 |
* handling. |
|
693 |
*/ |
|
694 |
if (ovp && nvp) {
|
|
695 |
if (ovp->v_type != nvp->v_type) {
|
|
696 |
VN_RELE(ovp); |
|
697 |
VN_RELE(nvp); |
|
698 |
return (EINVAL); |
|
699 |
} |
|
700 |
} |
|
701 |
||
702 |
/* make sure the source and the destination are in /dev */ |
|
703 |
if (odvp != ndvp) {
|
|
704 |
vattr.va_mask = AT_FSID; |
|
705 |
if (error = VOP_GETATTR(odvp, &vattr, 0, cred)) {
|
|
706 |
VN_RELE(ovp); |
|
707 |
return (error); |
|
708 |
} |
|
709 |
fsid = vattr.va_fsid; |
|
710 |
vattr.va_mask = AT_FSID; |
|
711 |
if (error = VOP_GETATTR(ndvp, &vattr, 0, cred)) {
|
|
712 |
VN_RELE(ovp); |
|
713 |
return (error); |
|
714 |
} |
|
715 |
if (fsid != vattr.va_fsid) {
|
|
716 |
VN_RELE(ovp); |
|
717 |
return (EXDEV); |
|
718 |
} |
|
719 |
} |
|
720 |
||
721 |
/* make sure the old entry can be deleted */ |
|
722 |
error = VOP_ACCESS(odvp, VWRITE, 0, cred); |
|
723 |
if (error) {
|
|
724 |
VN_RELE(ovp); |
|
725 |
return (error); |
|
726 |
} |
|
727 |
||
728 |
/* make sure the destination allows creation */ |
|
729 |
samedir = (fromparent == toparent); |
|
730 |
if (!samedir) {
|
|
731 |
error = VOP_ACCESS(ndvp, VEXEC|VWRITE, 0, cred); |
|
732 |
if (error) {
|
|
733 |
VN_RELE(ovp); |
|
734 |
return (error); |
|
735 |
} |
|
736 |
} |
|
737 |
||
738 |
fromdv = VTOSDEV(ovp); |
|
739 |
ASSERT(fromdv); |
|
740 |
||
741 |
/* check with the plug-in modules for the source directory */ |
|
742 |
rw_enter(&fromparent->sdev_contents, RW_READER); |
|
743 |
omap = sdev_get_map(fromparent, 0); |
|
744 |
rw_exit(&fromparent->sdev_contents); |
|
745 |
odirops = omap ? omap->dir_ops : NULL; |
|
746 |
if (odirops && ((fn = odirops->devnops_rename) != NULL)) {
|
|
747 |
if (samedir) {
|
|
748 |
error = (*fn)(&(fromdv->sdev_handle), nnm); |
|
749 |
} else {
|
|
750 |
len = strlen(nnm) + strlen(toparent->sdev_name) + 2; |
|
751 |
(void) snprintf(nnm_path, len, "%s/%s", |
|
752 |
toparent->sdev_name, nnm); |
|
753 |
error = (*fn)(&(fromdv->sdev_handle), nnm); |
|
754 |
} |
|
755 |
||
756 |
if (error) {
|
|
757 |
VN_RELE(ovp); |
|
758 |
return (error); |
|
759 |
} |
|
760 |
} |
|
761 |
||
762 |
/* |
|
763 |
* Remove the destination if exist |
|
764 |
* On failure, we should attempt to restore the current state |
|
765 |
* before returning error. |
|
766 |
*/ |
|
767 |
if (nvp) {
|
|
768 |
switch (nvp->v_type) {
|
|
769 |
case VDIR: |
|
770 |
error = VOP_RMDIR(ndvp, nnm, ndvp, cred); |
|
771 |
break; |
|
772 |
default: |
|
773 |
error = VOP_REMOVE(ndvp, nnm, cred); |
|
774 |
break; |
|
775 |
} |
|
776 |
||
777 |
if (error) {
|
|
778 |
sdcmn_err2(("sdev_rename: removing existing destination"
|
|
779 |
" %s failed, error %d\n", nnm, error)); |
|
780 |
VN_RELE(ovp); |
|
781 |
VN_RELE(nvp); |
|
782 |
return (error); |
|
783 |
} |
|
784 |
} |
|
785 |
||
786 |
/* |
|
787 |
* link source to new target in the memory |
|
788 |
*/ |
|
789 |
error = VOP_LOOKUP(ndvp, nnm, &nvp, NULL, 0, NULL, cred); |
|
790 |
if (error && (error != ENOENT)) {
|
|
791 |
VN_RELE(ovp); |
|
792 |
return (error); |
|
793 |
} else if (error == ENOENT) {
|
|
794 |
/* make a new node from the old node */ |
|
795 |
error = sdev_rnmnode(fromparent, fromdv, toparent, &todv, |
|
796 |
nnm, cred); |
|
797 |
} else {
|
|
798 |
ASSERT(nvp); |
|
799 |
if (VOP_REALVP(nvp, &realvp) == 0) {
|
|
800 |
VN_HOLD(realvp); |
|
801 |
VN_RELE(nvp); |
|
802 |
nvp = realvp; |
|
803 |
} |
|
804 |
||
805 |
/* destination file exists */ |
|
806 |
todv = VTOSDEV(nvp); |
|
807 |
ASSERT(todv); |
|
808 |
error = sdev_rnmnode(fromparent, fromdv, toparent, &todv, |
|
809 |
nnm, cred); |
|
810 |
if (error) {
|
|
811 |
sdcmn_err2(("sdev_rename: renaming %s to %s failed "
|
|
812 |
" with existing destination error %d\n", |
|
813 |
onm, nnm, error)); |
|
814 |
VN_RELE(nvp); |
|
815 |
VN_RELE(ovp); |
|
816 |
return (error); |
|
817 |
} |
|
818 |
} |
|
819 |
||
820 |
/* unlink from source */ |
|
821 |
if (error == 0) {
|
|
822 |
/* |
|
823 |
* check with the plug-in module whether source can be |
|
824 |
* re-used or not |
|
825 |
*/ |
|
826 |
if (odirops && ((rmfn = odirops->devnops_remove) != NULL)) {
|
|
827 |
error = (*rmfn)(&(fromdv->sdev_handle)); |
|
828 |
} |
|
829 |
||
830 |
if (error == 0) {
|
|
831 |
bkstore = SDEV_IS_PERSIST(fromdv) ? 1 : 0; |
|
832 |
rw_enter(&fromparent->sdev_contents, RW_WRITER); |
|
833 |
error = sdev_cache_update(fromparent, &fromdv, onm, |
|
834 |
SDEV_CACHE_DELETE); |
|
835 |
rw_exit(&fromparent->sdev_contents); |
|
836 |
||
837 |
/* best effforts clean up the backing store */ |
|
838 |
if (bkstore) {
|
|
839 |
ASSERT(fromparent->sdev_attrvp); |
|
840 |
error = VOP_REMOVE(fromparent->sdev_attrvp, |
|
841 |
onm, kcred); |
|
842 |
if (error) {
|
|
843 |
sdcmn_err2(("sdev_rename: device %s is "
|
|
844 |
"still on disk %s\n", onm, |
|
845 |
fromparent->sdev_path)); |
|
846 |
error = 0; |
|
847 |
} |
|
848 |
} |
|
849 |
||
850 |
if (error == EBUSY) {
|
|
851 |
error = 0; |
|
852 |
} |
|
853 |
} |
|
854 |
} |
|
855 |
||
856 |
/* book keeping the ovp v_count */ |
|
857 |
if (error) {
|
|
858 |
sdcmn_err2(("sdev_rename: renaming %s to %s failed "
|
|
859 |
" with error %d\n", onm, nnm, error)); |
|
860 |
VN_RELE(ovp); |
|
861 |
} |
|
862 |
||
863 |
return (error); |
|
864 |
} |
|
865 |
||
866 |
/* |
|
867 |
* dev-fs version of "ln -s path dev-name" |
|
868 |
* tnm - path, e.g. /devices/... or /dev/... |
|
869 |
* lnm - dev_name |
|
870 |
*/ |
|
871 |
static int |
|
872 |
sdev_symlink(struct vnode *dvp, char *lnm, struct vattr *tva, |
|
873 |
char *tnm, struct cred *cred) |
|
874 |
{
|
|
875 |
int error; |
|
876 |
struct vnode *vp = NULL; |
|
877 |
struct sdev_node *parent = (struct sdev_node *)VTOSDEV(dvp); |
|
878 |
struct sdev_node *self = (struct sdev_node *)NULL; |
|
879 |
||
880 |
ASSERT(parent); |
|
881 |
rw_enter(&parent->sdev_dotdot->sdev_contents, RW_READER); |
|
882 |
if (parent->sdev_state == SDEV_ZOMBIE) {
|
|
883 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
884 |
sdcmn_err2(("sdev_symlink: parent %s is ZOMBIED \n",
|
|
885 |
parent->sdev_name)); |
|
886 |
return (ENOENT); |
|
887 |
} |
|
888 |
||
889 |
if (!SDEV_IS_GLOBAL(parent)) {
|
|
890 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
891 |
return (ENOTSUP); |
|
892 |
} |
|
893 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
894 |
||
895 |
/* find existing name */ |
|
896 |
error = VOP_LOOKUP(dvp, lnm, &vp, NULL, 0, NULL, cred); |
|
897 |
if (error == 0) {
|
|
898 |
ASSERT(vp); |
|
899 |
VN_RELE(vp); |
|
900 |
sdcmn_err2(("sdev_symlink: node %s already exists\n", lnm));
|
|
901 |
return (EEXIST); |
|
902 |
} |
|
903 |
||
904 |
if (error != ENOENT) {
|
|
905 |
return (error); |
|
906 |
} |
|
907 |
||
908 |
/* put it into memory cache */ |
|
909 |
rw_enter(&parent->sdev_contents, RW_WRITER); |
|
910 |
error = sdev_mknode(parent, lnm, &self, tva, NULL, (void *)tnm, |
|
911 |
cred, SDEV_READY); |
|
912 |
if (error) {
|
|
913 |
rw_exit(&parent->sdev_contents); |
|
914 |
sdcmn_err2(("sdev_symlink: node %s creation failed\n", lnm));
|
|
915 |
if (self) |
|
916 |
SDEV_RELE(self); |
|
917 |
||
918 |
return (error); |
|
919 |
} |
|
920 |
ASSERT(self && (self->sdev_state == SDEV_READY)); |
|
921 |
rw_exit(&parent->sdev_contents); |
|
922 |
||
923 |
/* take care the timestamps for the node and its parent */ |
|
924 |
sdev_update_timestamps(SDEVTOV(self), kcred, |
|
925 |
AT_CTIME|AT_MTIME|AT_ATIME); |
|
926 |
sdev_update_timestamps(dvp, kcred, AT_MTIME|AT_ATIME); |
|
927 |
if (SDEV_IS_GLOBAL(parent)) |
|
928 |
atomic_inc_ulong(&parent->sdev_gdir_gen); |
|
929 |
||
930 |
/* wake up other threads blocked on looking up this node */ |
|
931 |
mutex_enter(&self->sdev_lookup_lock); |
|
932 |
SDEV_UNBLOCK_OTHERS(self, SDEV_LOOKUP); |
|
933 |
mutex_exit(&self->sdev_lookup_lock); |
|
934 |
SDEV_RELE(self); /* don't return with vnode held */ |
|
935 |
return (0); |
|
936 |
} |
|
937 |
||
938 |
static int |
|
939 |
sdev_mkdir(struct vnode *dvp, char *nm, struct vattr *va, struct vnode **vpp, |
|
940 |
struct cred *cred) |
|
941 |
{
|
|
942 |
int error; |
|
943 |
struct sdev_node *parent = (struct sdev_node *)VTOSDEV(dvp); |
|
944 |
struct sdev_node *self = NULL; |
|
945 |
struct vnode *vp = NULL; |
|
946 |
||
947 |
ASSERT(parent && parent->sdev_dotdot); |
|
948 |
rw_enter(&parent->sdev_dotdot->sdev_contents, RW_READER); |
|
949 |
if (parent->sdev_state == SDEV_ZOMBIE) {
|
|
950 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
951 |
return (ENOENT); |
|
952 |
} |
|
953 |
||
954 |
/* non-global do not allow pure directory creation */ |
|
955 |
if (!SDEV_IS_GLOBAL(parent)) {
|
|
956 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
957 |
return (prof_lookup(dvp, nm, vpp, cred)); |
|
958 |
} |
|
959 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
960 |
||
961 |
/* find existing name */ |
|
962 |
error = VOP_LOOKUP(dvp, nm, &vp, NULL, 0, NULL, cred); |
|
963 |
if (error == 0) {
|
|
964 |
VN_RELE(vp); |
|
965 |
return (EEXIST); |
|
966 |
} |
|
967 |
||
968 |
if (error != ENOENT) |
|
969 |
return (error); |
|
970 |
||
971 |
/* put it into memory */ |
|
972 |
rw_enter(&parent->sdev_contents, RW_WRITER); |
|
973 |
error = sdev_mknode(parent, nm, &self, |
|
974 |
va, NULL, NULL, cred, SDEV_READY); |
|
975 |
if (error) {
|
|
976 |
rw_exit(&parent->sdev_contents); |
|
977 |
if (self) |
|
978 |
SDEV_RELE(self); |
|
979 |
return (error); |
|
980 |
} |
|
981 |
ASSERT(self && (self->sdev_state == SDEV_READY)); |
|
982 |
rw_exit(&parent->sdev_contents); |
|
983 |
||
984 |
/* take care the timestamps for the node and its parent */ |
|
985 |
sdev_update_timestamps(SDEVTOV(self), kcred, |
|
986 |
AT_CTIME|AT_MTIME|AT_ATIME); |
|
987 |
sdev_update_timestamps(dvp, kcred, AT_MTIME|AT_ATIME); |
|
988 |
if (SDEV_IS_GLOBAL(parent)) |
|
989 |
atomic_inc_ulong(&parent->sdev_gdir_gen); |
|
990 |
||
991 |
/* wake up other threads blocked on looking up this node */ |
|
992 |
mutex_enter(&self->sdev_lookup_lock); |
|
993 |
SDEV_UNBLOCK_OTHERS(self, SDEV_LOOKUP); |
|
994 |
mutex_exit(&self->sdev_lookup_lock); |
|
995 |
*vpp = SDEVTOV(self); |
|
996 |
return (0); |
|
997 |
} |
|
998 |
||
999 |
/* |
|
1000 |
* allowing removing an empty directory under /dev |
|
1001 |
*/ |
|
1002 |
/*ARGSUSED*/ |
|
1003 |
static int |
|
1004 |
sdev_rmdir(struct vnode *dvp, char *nm, struct vnode *cdir, struct cred *cred) |
|
1005 |
{
|
|
1006 |
int error = 0; |
|
1007 |
struct sdev_node *parent = (struct sdev_node *)VTOSDEV(dvp); |
|
1008 |
struct sdev_node *self = NULL; |
|
1009 |
struct vnode *vp = NULL; |
|
1010 |
||
1011 |
/* bail out early */ |
|
1012 |
if (strcmp(nm, ".") == 0) |
|
1013 |
return (EINVAL); |
|
1014 |
if (strcmp(nm, "..") == 0) |
|
1015 |
return (EEXIST); /* should be ENOTEMPTY */ |
|
1016 |
||
1017 |
/* no destruction of non-global node */ |
|
1018 |
ASSERT(parent && parent->sdev_dotdot); |
|
1019 |
rw_enter(&parent->sdev_dotdot->sdev_contents, RW_READER); |
|
1020 |
if (!SDEV_IS_GLOBAL(parent)) {
|
|
1021 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
1022 |
return (ENOTSUP); |
|
1023 |
} |
|
1024 |
rw_exit(&parent->sdev_dotdot->sdev_contents); |
|
1025 |
||
1026 |
/* check existing name */ |
|
1027 |
rw_enter(&parent->sdev_contents, RW_WRITER); |
|
1028 |
self = sdev_cache_lookup(parent, nm); |
|
1029 |
if (self == NULL) {
|
|
1030 |
rw_exit(&parent->sdev_contents); |
|
1031 |
return (ENOENT); |
|
1032 |
} |
|
1033 |
||
1034 |
vp = SDEVTOV(self); |
|
1035 |
if ((self->sdev_state == SDEV_INIT) || |
|
1036 |
(self->sdev_state == SDEV_ZOMBIE)) {
|
|
1037 |
rw_exit(&parent->sdev_contents); |
|
1038 |
VN_RELE(vp); |
|
1039 |
return (ENOENT); |
|
1040 |
} |
|
1041 |
||
1042 |
/* some sanity checks */ |
|
1043 |
if (vp == dvp || vp == cdir) {
|
|
1044 |
rw_exit(&parent->sdev_contents); |
|
1045 |
VN_RELE(vp); |
|
1046 |
return (EINVAL); |
|
1047 |
} |
|
1048 |
||
1049 |
if (vp->v_type != VDIR) {
|
|
1050 |
rw_exit(&parent->sdev_contents); |
|
1051 |
VN_RELE(vp); |
|
1052 |
return (ENOTDIR); |
|
1053 |
} |
|
1054 |
||
1055 |
if (vn_vfswlock(vp)) {
|
|
1056 |
rw_exit(&parent->sdev_contents); |
|
1057 |
VN_RELE(vp); |
|
1058 |
return (EBUSY); |
|
1059 |
} |
|
1060 |
||
1061 |
if (vn_mountedvfs(vp) != NULL) {
|
|
1062 |
rw_exit(&parent->sdev_contents); |
|
1063 |
vn_vfsunlock(vp); |
|
1064 |
VN_RELE(vp); |
|
1065 |
return (EBUSY); |
|
1066 |
} |
|
1067 |
||
1068 |
self = VTOSDEV(vp); |
|
1069 |
/* bail out on a non-empty directory */ |
|
1070 |
rw_enter(&self->sdev_contents, RW_READER); |
|
1071 |
if (self->sdev_nlink > 2) {
|
|
1072 |
rw_exit(&self->sdev_contents); |
|
1073 |
rw_exit(&parent->sdev_contents); |
|
1074 |
vn_vfsunlock(vp); |
|
1075 |
VN_RELE(vp); |
|
1076 |
return (ENOTEMPTY); |
|
1077 |
} |
|
1078 |
rw_exit(&self->sdev_contents); |
|
1079 |
||
1080 |
/* unlink it from the directory cache */ |
|
1081 |
error = sdev_cache_update(parent, &self, nm, SDEV_CACHE_DELETE); |
|
1082 |
rw_exit(&parent->sdev_contents); |
|
1083 |
vn_vfsunlock(vp); |
|
1084 |
||
1085 |
if (error && (error != EBUSY)) {
|
|
1086 |
VN_RELE(vp); |
|
1087 |
} else {
|
|
1088 |
sdcmn_err2(("sdev_rmdir: cleaning node %s from directory "
|
|
1089 |
" cache with error %d\n", nm, error)); |
|
1090 |
||
1091 |
/* best effort to clean up the backing store */ |
|
1092 |
if (SDEV_IS_PERSIST(parent)) {
|
|
1093 |
ASSERT(parent->sdev_attrvp); |
|
1094 |
error = VOP_RMDIR(parent->sdev_attrvp, nm, |
|
1095 |
parent->sdev_attrvp, kcred); |
|
1096 |
sdcmn_err2(("sdev_rmdir: cleaning device %s is on"
|
|
1097 |
" disk error %d\n", parent->sdev_path, error)); |
|
1098 |
} |
|
1099 |
||
1100 |
if (error == EBUSY) |
|
1101 |
error = 0; |
|
1102 |
} |
|
1103 |
||
1104 |
return (error); |
|
1105 |
} |
|
1106 |
||
1107 |
/* |
|
1108 |
* read the contents of a symbolic link |
|
1109 |
*/ |
|
1110 |
static int |
|
1111 |
sdev_readlink(struct vnode *vp, struct uio *uiop, struct cred *cred) |
|
1112 |
{
|
|
1113 |
struct sdev_node *dv; |
|
1114 |
int error = 0; |
|
1115 |
||
1116 |
ASSERT(vp->v_type == VLNK); |
|
1117 |
||
1118 |
dv = VTOSDEV(vp); |
|
1119 |
||
1120 |
if (dv->sdev_attrvp) {
|
|
1121 |
/* non-NULL attrvp implys a persisted node at READY state */ |
|
1122 |
return (VOP_READLINK(dv->sdev_attrvp, uiop, cred)); |
|
1123 |
} else if (dv->sdev_symlink != NULL) {
|
|
1124 |
/* memory nodes, e.g. local nodes */ |
|
1125 |
rw_enter(&dv->sdev_contents, RW_READER); |
|
1126 |
sdcmn_err2(("sdev_readlink link is %s\n", dv->sdev_symlink));
|
|
1127 |
error = uiomove(dv->sdev_symlink, strlen(dv->sdev_symlink), |
|
1128 |
UIO_READ, uiop); |
|
1129 |
rw_exit(&dv->sdev_contents); |
|
1130 |
return (error); |
|
1131 |
} |
|
1132 |
||
1133 |
return (ENOENT); |
|
1134 |
} |
|
1135 |
||
1136 |
static int |
|
1137 |
sdev_readdir(struct vnode *dvp, struct uio *uiop, struct cred *cred, int *eofp) |
|
1138 |
{
|
|
|
2679
39fc2aead8db
6464694 assert failure during "ls $ZONEROOT/dev/pts"
szhou
parents:
2621
diff
changeset
|
1139 |
struct sdev_node *parent = VTOSDEV(dvp); |
|
39fc2aead8db
6464694 assert failure during "ls $ZONEROOT/dev/pts"
szhou
parents:
2621
diff
changeset
|
1140 |
|
|
39fc2aead8db
6464694 assert failure during "ls $ZONEROOT/dev/pts"
szhou
parents:
2621
diff
changeset
|
1141 |
ASSERT(parent); |
|
39fc2aead8db
6464694 assert failure during "ls $ZONEROOT/dev/pts"
szhou
parents:
2621
diff
changeset
|
1142 |
if (!SDEV_IS_GLOBAL(parent)) |
|
39fc2aead8db
6464694 assert failure during "ls $ZONEROOT/dev/pts"
szhou
parents:
2621
diff
changeset
|
1143 |
prof_filldir(parent); |
| 2621 | 1144 |
return (devname_readdir_func(dvp, uiop, cred, eofp, SDEV_BROWSE)); |
1145 |
} |
|
1146 |
||
1147 |
/*ARGSUSED1*/ |
|
1148 |
static void |
|
1149 |
sdev_inactive(struct vnode *vp, struct cred *cred) |
|
1150 |
{
|
|
1151 |
int clean; |
|
1152 |
struct sdev_node *dv = VTOSDEV(vp); |
|
1153 |
struct sdev_node *ddv = dv->sdev_dotdot; |
|
1154 |
struct sdev_node *idv; |
|
1155 |
struct sdev_node *prev = NULL; |
|
1156 |
int state; |
|
1157 |
struct devname_nsmap *map = NULL; |
|
1158 |
struct devname_ops *dirops = NULL; |
|
1159 |
void (*fn)(devname_handle_t *, struct cred *) = NULL; |
|
1160 |
||
1161 |
rw_enter(&ddv->sdev_contents, RW_WRITER); |
|
1162 |
state = dv->sdev_state; |
|
1163 |
||
1164 |
mutex_enter(&vp->v_lock); |
|
1165 |
ASSERT(vp->v_count >= 1); |
|
1166 |
||
1167 |
clean = (vp->v_count == 1) && (state == SDEV_ZOMBIE); |
|
1168 |
||
1169 |
/* |
|
1170 |
* last ref count on the ZOMBIE node is released. |
|
1171 |
* clean up the sdev_node, and |
|
1172 |
* release the hold on the backing store node so that |
|
1173 |
* the ZOMBIE backing stores also cleaned out. |
|
1174 |
*/ |
|
1175 |
if (clean) {
|
|
1176 |
ASSERT(ddv); |
|
1177 |
if (SDEV_IS_GLOBAL(dv)) {
|
|
1178 |
map = ddv->sdev_mapinfo; |
|
1179 |
dirops = map ? map->dir_ops : NULL; |
|
1180 |
if (dirops && (fn = dirops->devnops_inactive)) |
|
1181 |
(*fn)(&(dv->sdev_handle), cred); |
|
1182 |
} |
|
1183 |
||
1184 |
ddv->sdev_nlink--; |
|
1185 |
if (vp->v_type == VDIR) {
|
|
1186 |
dv->sdev_nlink--; |
|
1187 |
} |
|
1188 |
for (idv = ddv->sdev_dot; idv && idv != dv; |
|
1189 |
prev = idv, idv = idv->sdev_next); |
|
1190 |
ASSERT(idv == dv); |
|
1191 |
if (prev == NULL) |
|
1192 |
ddv->sdev_dot = dv->sdev_next; |
|
1193 |
else |
|
1194 |
prev->sdev_next = dv->sdev_next; |
|
1195 |
dv->sdev_next = NULL; |
|
1196 |
dv->sdev_nlink--; |
|
1197 |
--vp->v_count; |
|
1198 |
mutex_exit(&vp->v_lock); |
|
1199 |
sdev_nodedestroy(dv, 0); |
|
1200 |
} else {
|
|
1201 |
--vp->v_count; |
|
1202 |
mutex_exit(&vp->v_lock); |
|
1203 |
} |
|
1204 |
rw_exit(&ddv->sdev_contents); |
|
1205 |
} |
|
1206 |
||
1207 |
static int |
|
1208 |
sdev_fid(struct vnode *vp, struct fid *fidp) |
|
1209 |
{
|
|
1210 |
struct sdev_node *dv = VTOSDEV(vp); |
|
1211 |
struct sdev_fid *sdev_fid; |
|
1212 |
||
1213 |
if (fidp->fid_len < (sizeof (struct sdev_fid) - sizeof (ushort_t))) {
|
|
1214 |
fidp->fid_len = sizeof (struct sdev_fid) - sizeof (ushort_t); |
|
1215 |
return (ENOSPC); |
|
1216 |
} |
|
1217 |
||
1218 |
sdev_fid = (struct sdev_fid *)fidp; |
|
1219 |
bzero(sdev_fid, sizeof (struct sdev_fid)); |
|
1220 |
sdev_fid->sdevfid_len = |
|
1221 |
(int)sizeof (struct sdev_fid) - sizeof (ushort_t); |
|
1222 |
sdev_fid->sdevfid_ino = dv->sdev_ino; |
|
1223 |
||
1224 |
return (0); |
|
1225 |
} |
|
1226 |
||
1227 |
/* |
|
1228 |
* This pair of routines bracket all VOP_READ, VOP_WRITE |
|
1229 |
* and VOP_READDIR requests. The contents lock stops things |
|
1230 |
* moving around while we're looking at them. |
|
1231 |
*/ |
|
1232 |
static void |
|
1233 |
sdev_rwlock(struct vnode *vp, int write_flag) |
|
1234 |
{
|
|
1235 |
rw_enter(&VTOSDEV(vp)->sdev_contents, write_flag ? RW_WRITER : |
|
1236 |
RW_READER); |
|
1237 |
} |
|
1238 |
||
1239 |
/*ARGSUSED1*/ |
|
1240 |
static void |
|
1241 |
sdev_rwunlock(struct vnode *vp, int write_flag) |
|
1242 |
{
|
|
1243 |
rw_exit(&VTOSDEV(vp)->sdev_contents); |
|
1244 |
} |
|
1245 |
||
1246 |
/*ARGSUSED1*/ |
|
1247 |
static int |
|
1248 |
sdev_seek(struct vnode *vp, offset_t ooff, offset_t *noffp) |
|
1249 |
{
|
|
1250 |
struct vnode *attrvp = VTOSDEV(vp)->sdev_attrvp; |
|
1251 |
||
1252 |
ASSERT(vp->v_type != VCHR && |
|
1253 |
vp->v_type != VBLK && vp->v_type != VLNK); |
|
1254 |
||
1255 |
if (vp->v_type == VDIR) |
|
1256 |
return (fs_seek(vp, ooff, noffp)); |
|
1257 |
||
1258 |
ASSERT(attrvp); |
|
1259 |
return (VOP_SEEK(attrvp, ooff, noffp)); |
|
1260 |
} |
|
1261 |
||
1262 |
/*ARGSUSED1*/ |
|
1263 |
static int |
|
1264 |
sdev_frlock(struct vnode *vp, int cmd, struct flock64 *bfp, int flag, |
|
1265 |
offset_t offset, struct flk_callback *flk_cbp, struct cred *cr) |
|
1266 |
{
|
|
1267 |
int error; |
|
1268 |
struct sdev_node *dv = VTOSDEV(vp); |
|
1269 |
||
1270 |
ASSERT(dv); |
|
1271 |
ASSERT(dv->sdev_attrvp); |
|
1272 |
error = VOP_FRLOCK(dv->sdev_attrvp, cmd, bfp, flag, offset, |
|
1273 |
flk_cbp, cr); |
|
1274 |
||
1275 |
return (error); |
|
1276 |
} |
|
1277 |
||
1278 |
static int |
|
1279 |
sdev_setfl(struct vnode *vp, int oflags, int nflags, cred_t *cr) |
|
1280 |
{
|
|
1281 |
struct sdev_node *dv = VTOSDEV(vp); |
|
1282 |
ASSERT(dv); |
|
1283 |
ASSERT(dv->sdev_attrvp); |
|
1284 |
||
1285 |
return (VOP_SETFL(dv->sdev_attrvp, oflags, nflags, cr)); |
|
1286 |
} |
|
1287 |
||
1288 |
static int |
|
1289 |
sdev_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr) |
|
1290 |
{
|
|
1291 |
switch (cmd) {
|
|
1292 |
case _PC_ACL_ENABLED: |
|
1293 |
*valp = SDEV_ACL_FLAVOR(vp); |
|
1294 |
return (0); |
|
1295 |
} |
|
1296 |
||
1297 |
return (fs_pathconf(vp, cmd, valp, cr)); |
|
1298 |
} |
|
1299 |
||
1300 |
vnodeops_t *sdev_vnodeops; |
|
1301 |
||
1302 |
const fs_operation_def_t sdev_vnodeops_tbl[] = {
|
|
1303 |
VOPNAME_OPEN, sdev_open, |
|
1304 |
VOPNAME_CLOSE, sdev_close, |
|
1305 |
VOPNAME_READ, sdev_read, |
|
1306 |
VOPNAME_WRITE, sdev_write, |
|
1307 |
VOPNAME_IOCTL, sdev_ioctl, |
|
1308 |
VOPNAME_GETATTR, sdev_getattr, |
|
1309 |
VOPNAME_SETATTR, sdev_setattr, |
|
1310 |
VOPNAME_ACCESS, sdev_access, |
|
1311 |
VOPNAME_LOOKUP, sdev_lookup, |
|
1312 |
VOPNAME_CREATE, sdev_create, |
|
1313 |
VOPNAME_RENAME, sdev_rename, |
|
1314 |
VOPNAME_REMOVE, sdev_remove, |
|
1315 |
VOPNAME_MKDIR, sdev_mkdir, |
|
1316 |
VOPNAME_RMDIR, sdev_rmdir, |
|
1317 |
VOPNAME_READDIR, sdev_readdir, |
|
1318 |
VOPNAME_SYMLINK, sdev_symlink, |
|
1319 |
VOPNAME_READLINK, sdev_readlink, /* readlink */ |
|
1320 |
VOPNAME_FSYNC, (fs_generic_func_p) fs_sync, |
|
1321 |
VOPNAME_INACTIVE, (fs_generic_func_p)sdev_inactive, |
|
1322 |
VOPNAME_FID, sdev_fid, |
|
1323 |
VOPNAME_RWLOCK, (fs_generic_func_p)sdev_rwlock, |
|
1324 |
VOPNAME_RWUNLOCK, (fs_generic_func_p)sdev_rwunlock, |
|
1325 |
VOPNAME_SEEK, sdev_seek, |
|
1326 |
VOPNAME_FRLOCK, sdev_frlock, |
|
1327 |
VOPNAME_PATHCONF, sdev_pathconf, |
|
1328 |
VOPNAME_SETFL, sdev_setfl, |
|
1329 |
VOPNAME_SETSECATTR, sdev_setsecattr, /* setsecattr */ |
|
1330 |
VOPNAME_GETSECATTR, sdev_getsecattr, /* getsecattr */ |
|
1331 |
NULL, NULL |
|
1332 |
}; |
|
1333 |
||
1334 |
int sdev_vnodeops_tbl_size = sizeof (sdev_vnodeops_tbl); |