11257f4d1a
Setting of timestamps on devices had no effect visible to userland because timestamps for devices were set in places that are never used. This broke: - update of file change time after a change of an attribute - setting of file access and modification times. The VA_UTIMES_NULL case did not work. Revs 1.31-1.32 were supposed to fix this by copying correct bits from ufs, but had little or no effect because the old checks were not removed.
843 lines
20 KiB
C
843 lines
20 KiB
C
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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* Copyright (c) 2000
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* Poul-Henning Kamp. All rights reserved.
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*
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* This code is derived from software donated to Berkeley by
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* Jan-Simon Pendry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)kernfs_vnops.c 8.15 (Berkeley) 5/21/95
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* From: FreeBSD: src/sys/miscfs/kernfs/kernfs_vnops.c 1.43
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*
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* $FreeBSD$
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*/
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/*
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* TODO:
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* remove empty directories
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* mknod: hunt down DE_DELETED, compare name, reinstantiate.
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* mkdir: want it ?
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*/
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#include <opt_devfs.h>
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#ifndef NODEVFS
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/conf.h>
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#include <sys/dirent.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/malloc.h>
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#include <sys/mount.h>
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#include <sys/namei.h>
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#include <sys/proc.h>
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#include <sys/time.h>
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#include <sys/unistd.h>
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#include <sys/vnode.h>
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#include <fs/devfs/devfs.h>
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static int devfs_access(struct vop_access_args *ap);
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static int devfs_getattr(struct vop_getattr_args *ap);
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static int devfs_lookupx(struct vop_lookup_args *ap);
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static int devfs_mknod(struct vop_mknod_args *ap);
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static int devfs_pathconf(struct vop_pathconf_args *ap);
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static int devfs_print(struct vop_print_args *ap);
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static int devfs_read(struct vop_read_args *ap);
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static int devfs_readdir(struct vop_readdir_args *ap);
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static int devfs_readlink(struct vop_readlink_args *ap);
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static int devfs_reclaim(struct vop_reclaim_args *ap);
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static int devfs_remove(struct vop_remove_args *ap);
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static int devfs_revoke(struct vop_revoke_args *ap);
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static int devfs_setattr(struct vop_setattr_args *ap);
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static int devfs_symlink(struct vop_symlink_args *ap);
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/*
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* Construct the fully qualified path name relative to the mountpoint
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*/
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static char *
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devfs_fqpn(char *buf, struct vnode *dvp, struct componentname *cnp)
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{
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int i;
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struct devfs_dirent *de, *dd;
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struct devfs_mount *dmp;
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dmp = VFSTODEVFS(dvp->v_mount);
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dd = dvp->v_data;
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i = SPECNAMELEN;
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buf[i] = '\0';
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i -= cnp->cn_namelen;
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if (i < 0)
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return (NULL);
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bcopy(cnp->cn_nameptr, buf + i, cnp->cn_namelen);
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de = dd;
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while (de != dmp->dm_basedir) {
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i--;
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if (i < 0)
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return (NULL);
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buf[i] = '/';
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i -= de->de_dirent->d_namlen;
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if (i < 0)
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return (NULL);
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bcopy(de->de_dirent->d_name, buf + i,
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de->de_dirent->d_namlen);
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de = TAILQ_FIRST(&de->de_dlist); /* "." */
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de = TAILQ_NEXT(de, de_list); /* ".." */
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de = de->de_dir;
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}
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return (buf + i);
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}
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int
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devfs_allocv(struct devfs_dirent *de, struct mount *mp, struct vnode **vpp, struct thread *td)
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{
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int error;
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struct vnode *vp;
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dev_t dev;
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if (td == NULL)
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td = curthread; /* XXX */
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loop:
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vp = de->de_vnode;
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if (vp != NULL) {
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if (vget(vp, LK_EXCLUSIVE, td ? td : curthread))
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goto loop;
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*vpp = vp;
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return (0);
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}
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if (de->de_dirent->d_type == DT_CHR) {
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dev = *devfs_itod(de->de_inode);
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if (dev == NULL)
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return (ENOENT);
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} else {
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dev = NODEV;
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}
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error = getnewvnode(VT_DEVFS, mp, devfs_vnodeop_p, &vp);
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if (error != 0) {
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printf("devfs_allocv: failed to allocate new vnode\n");
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return (error);
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}
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if (de->de_dirent->d_type == DT_CHR) {
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vp->v_type = VCHR;
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vp = addaliasu(vp, dev->si_udev);
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vp->v_op = devfs_specop_p;
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} else if (de->de_dirent->d_type == DT_DIR) {
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vp->v_type = VDIR;
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} else if (de->de_dirent->d_type == DT_LNK) {
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vp->v_type = VLNK;
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} else {
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vp->v_type = VBAD;
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}
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vp->v_data = de;
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de->de_vnode = vp;
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vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, td);
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*vpp = vp;
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return (0);
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}
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static int
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devfs_access(ap)
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struct vop_access_args /* {
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struct vnode *a_vp;
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int a_mode;
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struct ucred *a_cred;
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struct thread *a_td;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct devfs_dirent *de;
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de = vp->v_data;
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if (vp->v_type == VDIR)
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de = de->de_dir;
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return (vaccess(vp->v_type, de->de_mode, de->de_uid, de->de_gid,
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ap->a_mode, ap->a_cred, NULL));
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}
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static int
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devfs_getattr(ap)
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struct vop_getattr_args /* {
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struct vnode *a_vp;
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struct vattr *a_vap;
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struct ucred *a_cred;
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struct thread *a_td;
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} */ *ap;
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{
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struct vnode *vp = ap->a_vp;
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struct vattr *vap = ap->a_vap;
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int error = 0;
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struct devfs_dirent *de;
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dev_t dev;
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de = vp->v_data;
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if (vp->v_type == VDIR)
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de = de->de_dir;
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bzero((caddr_t) vap, sizeof(*vap));
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vattr_null(vap);
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vap->va_uid = de->de_uid;
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vap->va_gid = de->de_gid;
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vap->va_mode = de->de_mode;
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if (vp->v_type == VLNK)
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vap->va_size = de->de_dirent->d_namlen;
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else if (vp->v_type == VDIR)
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vap->va_size = vap->va_bytes = DEV_BSIZE;
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else
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vap->va_size = 0;
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if (vp->v_type != VDIR)
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vap->va_bytes = 0;
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vap->va_blocksize = DEV_BSIZE;
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vap->va_type = vp->v_type;
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#define fix(aa) \
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do { \
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if ((aa).tv_sec == 0) { \
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(aa).tv_sec = boottime.tv_sec; \
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(aa).tv_nsec = boottime.tv_usec * 1000; \
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} \
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} while (0)
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if (vp->v_type != VCHR) {
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fix(de->de_atime);
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vap->va_atime = de->de_atime;
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fix(de->de_mtime);
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vap->va_mtime = de->de_mtime;
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fix(de->de_ctime);
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vap->va_ctime = de->de_ctime;
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} else {
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dev = vp->v_rdev;
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fix(dev->si_atime);
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vap->va_atime = dev->si_atime;
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fix(dev->si_mtime);
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vap->va_mtime = dev->si_mtime;
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fix(dev->si_ctime);
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vap->va_ctime = dev->si_ctime;
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vap->va_rdev = dev->si_udev;
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}
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vap->va_gen = 0;
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vap->va_flags = 0;
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vap->va_nlink = de->de_links;
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vap->va_fileid = de->de_inode;
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return (error);
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}
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static int
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devfs_lookupx(ap)
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struct vop_lookup_args /* {
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struct vnode * a_dvp;
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struct vnode ** a_vpp;
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struct componentname * a_cnp;
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} */ *ap;
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{
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struct componentname *cnp;
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struct vnode *dvp, **vpp;
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struct thread *td;
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struct devfs_dirent *de, *dd;
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struct devfs_mount *dmp;
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dev_t cdev, *cpdev;
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int error, cloned, flags, nameiop;
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char specname[SPECNAMELEN + 1], *pname;
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cnp = ap->a_cnp;
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vpp = ap->a_vpp;
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dvp = ap->a_dvp;
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pname = cnp->cn_nameptr;
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td = cnp->cn_thread;
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flags = cnp->cn_flags;
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nameiop = cnp->cn_nameiop;
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dmp = VFSTODEVFS(dvp->v_mount);
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cloned = 0;
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dd = dvp->v_data;
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*vpp = NULLVP;
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if (nameiop == RENAME)
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return (EOPNOTSUPP);
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if (dvp->v_type != VDIR)
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return (ENOTDIR);
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if ((flags & ISDOTDOT) && (dvp->v_flag & VROOT))
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return (EIO);
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error = VOP_ACCESS(dvp, VEXEC, cnp->cn_cred, td);
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if (error)
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return (error);
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if (cnp->cn_namelen == 1 && *pname == '.') {
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if (nameiop != LOOKUP)
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return (EINVAL);
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*vpp = dvp;
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VREF(dvp);
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return (0);
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}
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if (flags & ISDOTDOT) {
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if (nameiop != LOOKUP)
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return (EINVAL);
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VOP_UNLOCK(dvp, 0, td);
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de = TAILQ_FIRST(&dd->de_dlist); /* "." */
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de = TAILQ_NEXT(de, de_list); /* ".." */
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de = de->de_dir;
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error = devfs_allocv(de, dvp->v_mount, vpp, td);
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if (error) {
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vn_lock(dvp, LK_EXCLUSIVE | LK_RETRY, td);
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return (error);
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}
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if ((flags & LOCKPARENT) && (flags & ISLASTCN))
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error = vn_lock(dvp, LK_EXCLUSIVE, td);
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if (error)
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vput(*vpp);
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return (error);
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}
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devfs_populate(dmp);
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dd = dvp->v_data;
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TAILQ_FOREACH(de, &dd->de_dlist, de_list) {
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if (cnp->cn_namelen != de->de_dirent->d_namlen)
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continue;
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if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name,
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de->de_dirent->d_namlen) != 0)
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continue;
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if (de->de_flags & DE_WHITEOUT)
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goto notfound;
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goto found;
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}
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if (nameiop == DELETE)
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goto notfound;
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/*
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* OK, we didn't have an entry for the name we were asked for
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* so we try to see if anybody can create it on demand.
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*/
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pname = devfs_fqpn(specname, dvp, cnp);
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if (pname == NULL)
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goto notfound;
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cdev = NODEV;
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EVENTHANDLER_INVOKE(dev_clone, pname, strlen(pname), &cdev);
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if (cdev == NODEV)
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goto notfound;
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devfs_populate(dmp);
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dd = dvp->v_data;
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TAILQ_FOREACH(de, &dd->de_dlist, de_list) {
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cpdev = devfs_itod(de->de_inode);
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if (cpdev != NULL && cdev == *cpdev)
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goto found;
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continue;
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}
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notfound:
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if ((nameiop == CREATE || nameiop == RENAME) &&
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(flags & (LOCKPARENT | WANTPARENT)) && (flags & ISLASTCN)) {
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cnp->cn_flags |= SAVENAME;
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if (!(flags & LOCKPARENT))
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VOP_UNLOCK(dvp, 0, td);
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return (EJUSTRETURN);
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}
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return (ENOENT);
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found:
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if ((cnp->cn_nameiop == DELETE) && (flags & ISLASTCN)) {
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error = VOP_ACCESS(dvp, VWRITE, cnp->cn_cred, td);
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if (error)
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return (error);
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if (*vpp == dvp) {
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VREF(dvp);
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*vpp = dvp;
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return (0);
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}
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error = devfs_allocv(de, dvp->v_mount, vpp, td);
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if (error)
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return (error);
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if (!(flags & LOCKPARENT))
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VOP_UNLOCK(dvp, 0, td);
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return (0);
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}
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error = devfs_allocv(de, dvp->v_mount, vpp, td);
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if (error)
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return (error);
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if (!(flags & LOCKPARENT) || !(flags & ISLASTCN))
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VOP_UNLOCK(dvp, 0, td);
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return (0);
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}
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static int
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devfs_lookup(struct vop_lookup_args *ap)
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{
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int j;
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struct devfs_mount *dmp;
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dmp = VFSTODEVFS(ap->a_dvp->v_mount);
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lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
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j = devfs_lookupx(ap);
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lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
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return (j);
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}
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static int
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devfs_mknod(struct vop_mknod_args *ap)
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/*
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struct vop_mknod_args {
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struct vnodeop_desc *a_desc;
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struct vnode *a_dvp;
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struct vnode **a_vpp;
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struct componentname *a_cnp;
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struct vattr *a_vap;
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};
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*/
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{
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struct componentname *cnp;
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struct vnode *dvp, **vpp;
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struct thread *td;
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struct devfs_dirent *dd, *de;
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struct devfs_mount *dmp;
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int cloned, flags, nameiop;
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int error;
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dvp = ap->a_dvp;
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dmp = VFSTODEVFS(dvp->v_mount);
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lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
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cnp = ap->a_cnp;
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vpp = ap->a_vpp;
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td = cnp->cn_thread;
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flags = cnp->cn_flags;
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nameiop = cnp->cn_nameiop;
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cloned = 0;
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dd = dvp->v_data;
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error = ENOENT;
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TAILQ_FOREACH(de, &dd->de_dlist, de_list) {
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if (cnp->cn_namelen != de->de_dirent->d_namlen)
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continue;
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if (bcmp(cnp->cn_nameptr, de->de_dirent->d_name,
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de->de_dirent->d_namlen) != 0)
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continue;
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if (de->de_flags & DE_WHITEOUT)
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break;
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goto notfound;
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}
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if (de == NULL)
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goto notfound;
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de->de_flags &= ~DE_WHITEOUT;
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error = devfs_allocv(de, dvp->v_mount, vpp, td);
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notfound:
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lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
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return (error);
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}
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static int
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devfs_pathconf(ap)
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struct vop_pathconf_args /* {
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struct vnode *a_vp;
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int a_name;
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int *a_retval;
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} */ *ap;
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{
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switch (ap->a_name) {
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case _PC_NAME_MAX:
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*ap->a_retval = NAME_MAX;
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return (0);
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case _PC_PATH_MAX:
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*ap->a_retval = PATH_MAX;
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return (0);
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default:
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return (vop_stdpathconf(ap));
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}
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/* NOTREACHED */
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}
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/* ARGSUSED */
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static int
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devfs_print(ap)
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struct vop_print_args /* {
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struct vnode *a_vp;
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} */ *ap;
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{
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printf("tag VT_DEVFS, devfs vnode\n");
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return (0);
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}
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|
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static int
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|
devfs_read(ap)
|
|
struct vop_read_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
int a_ioflag;
|
|
struct ucred *a_cred;
|
|
} */ *ap;
|
|
{
|
|
|
|
if (ap->a_vp->v_type != VDIR)
|
|
return (EINVAL);
|
|
return (VOP_READDIR(ap->a_vp, ap->a_uio, ap->a_cred, NULL, NULL, NULL));
|
|
}
|
|
|
|
static int
|
|
devfs_readdir(ap)
|
|
struct vop_readdir_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cred;
|
|
int *a_eofflag;
|
|
int *a_ncookies;
|
|
u_long **a_cookies;
|
|
} */ *ap;
|
|
{
|
|
int error;
|
|
struct uio *uio;
|
|
struct dirent *dp;
|
|
struct devfs_dirent *dd;
|
|
struct devfs_dirent *de;
|
|
struct devfs_mount *dmp;
|
|
off_t off, oldoff;
|
|
int ncookies = 0;
|
|
u_long *cookiebuf, *cookiep;
|
|
struct dirent *dps, *dpe;
|
|
|
|
if (ap->a_vp->v_type != VDIR)
|
|
return (ENOTDIR);
|
|
|
|
uio = ap->a_uio;
|
|
if (uio->uio_offset < 0)
|
|
return (EINVAL);
|
|
|
|
dmp = VFSTODEVFS(ap->a_vp->v_mount);
|
|
lockmgr(&dmp->dm_lock, LK_SHARED, 0, curthread);
|
|
devfs_populate(dmp);
|
|
error = 0;
|
|
de = ap->a_vp->v_data;
|
|
off = 0;
|
|
oldoff = uio->uio_offset;
|
|
TAILQ_FOREACH(dd, &de->de_dlist, de_list) {
|
|
if (dd->de_flags & DE_WHITEOUT)
|
|
continue;
|
|
if (dd->de_dirent->d_type == DT_DIR)
|
|
de = dd->de_dir;
|
|
else
|
|
de = dd;
|
|
dp = dd->de_dirent;
|
|
if (dp->d_reclen > uio->uio_resid)
|
|
break;
|
|
dp->d_fileno = de->de_inode;
|
|
if (off >= uio->uio_offset) {
|
|
ncookies++;
|
|
error = uiomove((caddr_t)dp, dp->d_reclen, uio);
|
|
if (error)
|
|
break;
|
|
}
|
|
off += dp->d_reclen;
|
|
}
|
|
if( !error && ap->a_ncookies != NULL && ap->a_cookies != NULL ) {
|
|
MALLOC(cookiebuf, u_long *, ncookies * sizeof(u_long),
|
|
M_TEMP, M_WAITOK);
|
|
cookiep = cookiebuf;
|
|
dps = (struct dirent *)
|
|
(uio->uio_iov->iov_base - (uio->uio_offset - oldoff));
|
|
dpe = (struct dirent *) uio->uio_iov->iov_base;
|
|
for( dp = dps;
|
|
dp < dpe;
|
|
dp = (struct dirent *)((caddr_t) dp + dp->d_reclen)) {
|
|
oldoff += dp->d_reclen;
|
|
*cookiep++ = (u_long) oldoff;
|
|
}
|
|
*ap->a_ncookies = ncookies;
|
|
*ap->a_cookies = cookiebuf;
|
|
}
|
|
lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
|
|
uio->uio_offset = off;
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
devfs_readlink(ap)
|
|
struct vop_readlink_args /* {
|
|
struct vnode *a_vp;
|
|
struct uio *a_uio;
|
|
struct ucred *a_cead;
|
|
} */ *ap;
|
|
{
|
|
int error;
|
|
struct devfs_dirent *de;
|
|
|
|
de = ap->a_vp->v_data;
|
|
error = uiomove(de->de_symlink, strlen(de->de_symlink), ap->a_uio);
|
|
return (error);
|
|
}
|
|
|
|
static int
|
|
devfs_reclaim(ap)
|
|
struct vop_reclaim_args /* {
|
|
struct vnode *a_vp;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct devfs_dirent *de;
|
|
int i;
|
|
|
|
de = vp->v_data;
|
|
if (de != NULL)
|
|
de->de_vnode = NULL;
|
|
vp->v_data = NULL;
|
|
if (vp->v_rdev != NODEV && vp->v_rdev != NULL) {
|
|
i = vcount(vp);
|
|
if ((vp->v_rdev->si_flags & SI_CHEAPCLONE) && i == 0 &&
|
|
(vp->v_rdev->si_flags & SI_NAMED))
|
|
destroy_dev(vp->v_rdev);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
devfs_remove(ap)
|
|
struct vop_remove_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode *a_vp;
|
|
struct componentname *a_cnp;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct devfs_dirent *dd;
|
|
struct devfs_dirent *de;
|
|
struct devfs_mount *dmp = VFSTODEVFS(vp->v_mount);
|
|
|
|
lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
|
|
dd = ap->a_dvp->v_data;
|
|
de = vp->v_data;
|
|
if (de->de_dirent->d_type == DT_LNK) {
|
|
TAILQ_REMOVE(&dd->de_dlist, de, de_list);
|
|
if (de->de_vnode)
|
|
de->de_vnode->v_data = NULL;
|
|
FREE(de, M_DEVFS);
|
|
} else {
|
|
de->de_flags |= DE_WHITEOUT;
|
|
}
|
|
lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Revoke is called on a tty when a terminal session ends. The vnode
|
|
* is orphaned by setting v_op to deadfs so we need to let go of it
|
|
* as well so that we create a new one next time around.
|
|
*/
|
|
static int
|
|
devfs_revoke(ap)
|
|
struct vop_revoke_args /* {
|
|
struct vnode *a_vp;
|
|
int a_flags;
|
|
} */ *ap;
|
|
{
|
|
struct vnode *vp = ap->a_vp;
|
|
struct devfs_dirent *de;
|
|
|
|
de = vp->v_data;
|
|
de->de_vnode = NULL;
|
|
vop_revoke(ap);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
devfs_setattr(ap)
|
|
struct vop_setattr_args /* {
|
|
struct vnode *a_vp;
|
|
struct vattr *a_vap;
|
|
struct ucred *a_cred;
|
|
struct proc *a_p;
|
|
} */ *ap;
|
|
{
|
|
struct devfs_dirent *de;
|
|
struct vattr *vap;
|
|
struct vnode *vp;
|
|
int c, error;
|
|
uid_t uid;
|
|
gid_t gid;
|
|
|
|
vap = ap->a_vap;
|
|
vp = ap->a_vp;
|
|
if ((vap->va_type != VNON) ||
|
|
(vap->va_nlink != VNOVAL) ||
|
|
(vap->va_fsid != VNOVAL) ||
|
|
(vap->va_fileid != VNOVAL) ||
|
|
(vap->va_blocksize != VNOVAL) ||
|
|
(vap->va_flags != VNOVAL && vap->va_flags != 0) ||
|
|
(vap->va_rdev != VNOVAL) ||
|
|
((int)vap->va_bytes != VNOVAL) ||
|
|
(vap->va_gen != VNOVAL)) {
|
|
return (EINVAL);
|
|
}
|
|
|
|
de = vp->v_data;
|
|
if (vp->v_type == VDIR)
|
|
de = de->de_dir;
|
|
|
|
error = c = 0;
|
|
if (vap->va_uid == (uid_t)VNOVAL)
|
|
uid = de->de_uid;
|
|
else
|
|
uid = vap->va_uid;
|
|
if (vap->va_gid == (gid_t)VNOVAL)
|
|
gid = de->de_gid;
|
|
else
|
|
gid = vap->va_gid;
|
|
if (uid != de->de_uid || gid != de->de_gid) {
|
|
if (((ap->a_cred->cr_uid != de->de_uid) || uid != de->de_uid ||
|
|
(gid != de->de_gid && !groupmember(gid, ap->a_cred))) &&
|
|
(error = suser_cred(ap->a_td->td_ucred, PRISON_ROOT)) != 0)
|
|
return (error);
|
|
de->de_uid = uid;
|
|
de->de_gid = gid;
|
|
c = 1;
|
|
}
|
|
|
|
if (vap->va_mode != (mode_t)VNOVAL) {
|
|
if ((ap->a_cred->cr_uid != de->de_uid) &&
|
|
(error = suser_cred(ap->a_td->td_ucred, PRISON_ROOT)))
|
|
return (error);
|
|
de->de_mode = vap->va_mode;
|
|
c = 1;
|
|
}
|
|
|
|
if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
|
|
/* See the comment in ufs_vnops::ufs_setattr(). */
|
|
if ((error = VOP_ACCESS(vp, VADMIN, ap->a_cred, ap->a_td)) &&
|
|
((vap->va_vaflags & VA_UTIMES_NULL) == 0 ||
|
|
(error = VOP_ACCESS(vp, VWRITE, ap->a_cred, ap->a_td))))
|
|
return (error);
|
|
if (vap->va_atime.tv_sec != VNOVAL) {
|
|
if (vp->v_type == VCHR)
|
|
vp->v_rdev->si_atime = vap->va_atime;
|
|
else
|
|
de->de_atime = vap->va_atime;
|
|
}
|
|
if (vap->va_mtime.tv_sec != VNOVAL) {
|
|
if (vp->v_type == VCHR)
|
|
vp->v_rdev->si_mtime = vap->va_mtime;
|
|
else
|
|
de->de_mtime = vap->va_mtime;
|
|
}
|
|
c = 1;
|
|
}
|
|
|
|
if (c) {
|
|
if (vp->v_type == VCHR)
|
|
vfs_timestamp(&vp->v_rdev->si_ctime);
|
|
else
|
|
vfs_timestamp(&de->de_mtime);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
devfs_symlink(ap)
|
|
struct vop_symlink_args /* {
|
|
struct vnode *a_dvp;
|
|
struct vnode **a_vpp;
|
|
struct componentname *a_cnp;
|
|
struct vattr *a_vap;
|
|
char *a_target;
|
|
} */ *ap;
|
|
{
|
|
int i, error;
|
|
struct devfs_dirent *dd;
|
|
struct devfs_dirent *de;
|
|
struct devfs_mount *dmp;
|
|
|
|
error = suser(ap->a_cnp->cn_thread);
|
|
if (error)
|
|
return(error);
|
|
dmp = VFSTODEVFS(ap->a_dvp->v_mount);
|
|
dd = ap->a_dvp->v_data;
|
|
de = devfs_newdirent(ap->a_cnp->cn_nameptr, ap->a_cnp->cn_namelen);
|
|
de->de_uid = 0;
|
|
de->de_gid = 0;
|
|
de->de_mode = 0755;
|
|
de->de_inode = dmp->dm_inode++;
|
|
de->de_dirent->d_type = DT_LNK;
|
|
i = strlen(ap->a_target) + 1;
|
|
MALLOC(de->de_symlink, char *, i, M_DEVFS, M_WAITOK);
|
|
bcopy(ap->a_target, de->de_symlink, i);
|
|
lockmgr(&dmp->dm_lock, LK_EXCLUSIVE, 0, curthread);
|
|
TAILQ_INSERT_TAIL(&dd->de_dlist, de, de_list);
|
|
devfs_allocv(de, ap->a_dvp->v_mount, ap->a_vpp, 0);
|
|
lockmgr(&dmp->dm_lock, LK_RELEASE, 0, curthread);
|
|
return (0);
|
|
}
|
|
|
|
static vop_t **devfs_vnodeop_p;
|
|
static struct vnodeopv_entry_desc devfs_vnodeop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *) vop_defaultop },
|
|
{ &vop_access_desc, (vop_t *) devfs_access },
|
|
{ &vop_getattr_desc, (vop_t *) devfs_getattr },
|
|
{ &vop_lookup_desc, (vop_t *) devfs_lookup },
|
|
{ &vop_mknod_desc, (vop_t *) devfs_mknod },
|
|
{ &vop_pathconf_desc, (vop_t *) devfs_pathconf },
|
|
{ &vop_print_desc, (vop_t *) devfs_print },
|
|
{ &vop_read_desc, (vop_t *) devfs_read },
|
|
{ &vop_readdir_desc, (vop_t *) devfs_readdir },
|
|
{ &vop_readlink_desc, (vop_t *) devfs_readlink },
|
|
{ &vop_reclaim_desc, (vop_t *) devfs_reclaim },
|
|
{ &vop_remove_desc, (vop_t *) devfs_remove },
|
|
{ &vop_revoke_desc, (vop_t *) devfs_revoke },
|
|
{ &vop_setattr_desc, (vop_t *) devfs_setattr },
|
|
{ &vop_symlink_desc, (vop_t *) devfs_symlink },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc devfs_vnodeop_opv_desc =
|
|
{ &devfs_vnodeop_p, devfs_vnodeop_entries };
|
|
|
|
VNODEOP_SET(devfs_vnodeop_opv_desc);
|
|
|
|
static vop_t **devfs_specop_p;
|
|
static struct vnodeopv_entry_desc devfs_specop_entries[] = {
|
|
{ &vop_default_desc, (vop_t *) spec_vnoperate },
|
|
{ &vop_access_desc, (vop_t *) devfs_access },
|
|
{ &vop_getattr_desc, (vop_t *) devfs_getattr },
|
|
{ &vop_print_desc, (vop_t *) devfs_print },
|
|
{ &vop_reclaim_desc, (vop_t *) devfs_reclaim },
|
|
{ &vop_remove_desc, (vop_t *) devfs_remove },
|
|
{ &vop_revoke_desc, (vop_t *) devfs_revoke },
|
|
{ &vop_setattr_desc, (vop_t *) devfs_setattr },
|
|
{ NULL, NULL }
|
|
};
|
|
static struct vnodeopv_desc devfs_specop_opv_desc =
|
|
{ &devfs_specop_p, devfs_specop_entries };
|
|
|
|
VNODEOP_SET(devfs_specop_opv_desc);
|
|
#endif
|