/sys/ufs/ext2fs/ext2fs_vnops.c
C | 1664 lines | 1180 code | 93 blank | 391 comment | 279 complexity | 0971aa255f7c3e5ad9b47cafa714848c MD5 | raw file
Possible License(s): BSD-3-Clause, LGPL-2.0, WTFPL, AGPL-1.0
- /* $NetBSD: ext2fs_vnops.c,v 1.101 2011/11/18 21:18:51 christos Exp $ */
- /*
- * Copyright (c) 1982, 1986, 1989, 1993
- * The Regents of the University of California. All rights reserved.
- * (c) UNIX System Laboratories, Inc.
- * All or some portions of this file are derived from material licensed
- * to the University of California by American Telephone and Telegraph
- * Co. or Unix System Laboratories, Inc. and are reproduced herein with
- * the permission of UNIX System Laboratories, Inc.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)ufs_vnops.c 8.14 (Berkeley) 10/26/94
- * Modified for ext2fs by Manuel Bouyer.
- */
- /*
- * Copyright (c) 1997 Manuel Bouyer.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
- * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
- * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
- * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * @(#)ufs_vnops.c 8.14 (Berkeley) 10/26/94
- * Modified for ext2fs by Manuel Bouyer.
- */
- #include <sys/cdefs.h>
- __KERNEL_RCSID(0, "$NetBSD: ext2fs_vnops.c,v 1.101 2011/11/18 21:18:51 christos Exp $");
- #include <sys/param.h>
- #include <sys/systm.h>
- #include <sys/resourcevar.h>
- #include <sys/kernel.h>
- #include <sys/file.h>
- #include <sys/stat.h>
- #include <sys/buf.h>
- #include <sys/proc.h>
- #include <sys/mount.h>
- #include <sys/namei.h>
- #include <sys/vnode.h>
- #include <sys/lockf.h>
- #include <sys/malloc.h>
- #include <sys/pool.h>
- #include <sys/signalvar.h>
- #include <sys/kauth.h>
- #include <miscfs/fifofs/fifo.h>
- #include <miscfs/genfs/genfs.h>
- #include <miscfs/specfs/specdev.h>
- #include <ufs/ufs/inode.h>
- #include <ufs/ufs/ufs_extern.h>
- #include <ufs/ufs/ufsmount.h>
- #include <ufs/ext2fs/ext2fs.h>
- #include <ufs/ext2fs/ext2fs_extern.h>
- #include <ufs/ext2fs/ext2fs_dir.h>
- extern int prtactive;
- static int ext2fs_chmod(struct vnode *, int, kauth_cred_t, struct lwp *);
- static int ext2fs_chown(struct vnode *, uid_t, gid_t, kauth_cred_t,
- struct lwp *);
- union _qcvt {
- int64_t qcvt;
- int32_t val[2];
- };
- #define SETHIGH(q, h) { \
- union _qcvt tmp; \
- tmp.qcvt = (q); \
- tmp.val[_QUAD_HIGHWORD] = (h); \
- (q) = tmp.qcvt; \
- }
- #define SETLOW(q, l) { \
- union _qcvt tmp; \
- tmp.qcvt = (q); \
- tmp.val[_QUAD_LOWWORD] = (l); \
- (q) = tmp.qcvt; \
- }
- /*
- * Create a regular file
- */
- int
- ext2fs_create(void *v)
- {
- struct vop_create_args /* {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- } */ *ap = v;
- int error;
- error =
- ext2fs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode),
- ap->a_dvp, ap->a_vpp, ap->a_cnp);
- if (error)
- return (error);
- VN_KNOTE(ap->a_dvp, NOTE_WRITE);
- return (0);
- }
- /*
- * Mknod vnode call
- */
- /* ARGSUSED */
- int
- ext2fs_mknod(void *v)
- {
- struct vop_mknod_args /* {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- } */ *ap = v;
- struct vattr *vap = ap->a_vap;
- struct vnode **vpp = ap->a_vpp;
- struct inode *ip;
- int error;
- struct mount *mp;
- ino_t ino;
- if ((error = ext2fs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode),
- ap->a_dvp, vpp, ap->a_cnp)) != 0)
- return (error);
- VN_KNOTE(ap->a_dvp, NOTE_WRITE);
- ip = VTOI(*vpp);
- mp = (*vpp)->v_mount;
- ino = ip->i_number;
- ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
- if (vap->va_rdev != VNOVAL) {
- /*
- * Want to be able to use this to make badblock
- * inodes, so don't truncate the dev number.
- */
- ip->i_din.e2fs_din->e2di_rdev = h2fs32(vap->va_rdev);
- }
- /*
- * Remove inode so that it will be reloaded by VFS_VGET and
- * checked to see if it is an alias of an existing entry in
- * the inode cache.
- */
- VOP_UNLOCK(*vpp);
- (*vpp)->v_type = VNON;
- vgone(*vpp);
- error = VFS_VGET(mp, ino, vpp);
- if (error != 0) {
- *vpp = NULL;
- return (error);
- }
- return (0);
- }
- /*
- * Open called.
- *
- * Just check the APPEND flag.
- */
- /* ARGSUSED */
- int
- ext2fs_open(void *v)
- {
- struct vop_open_args /* {
- struct vnode *a_vp;
- int a_mode;
- kauth_cred_t a_cred;
- } */ *ap = v;
- /*
- * Files marked append-only must be opened for appending.
- */
- if ((VTOI(ap->a_vp)->i_e2fs_flags & EXT2_APPEND) &&
- (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE)
- return (EPERM);
- return (0);
- }
- static int
- ext2fs_check_possible(struct vnode *vp, struct inode *ip, mode_t mode)
- {
- /*
- * Disallow write attempts on read-only file systems;
- * unless the file is a socket, fifo, or a block or
- * character device resident on the file system.
- */
- if (mode & VWRITE) {
- switch (vp->v_type) {
- case VDIR:
- case VLNK:
- case VREG:
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- break;
- default:
- break;
- }
- }
- /* If immutable bit set, nobody gets to write it. */
- if ((mode & VWRITE) && (ip->i_e2fs_flags & EXT2_IMMUTABLE))
- return (EPERM);
- return 0;
- }
- static int
- ext2fs_check_permitted(struct vnode *vp, struct inode *ip, mode_t mode,
- kauth_cred_t cred)
- {
- return genfs_can_access(vp->v_type, ip->i_e2fs_mode & ALLPERMS,
- ip->i_uid, ip->i_gid, mode, cred);
- }
- int
- ext2fs_access(void *v)
- {
- struct vop_access_args /* {
- struct vnode *a_vp;
- int a_mode;
- kauth_cred_t a_cred;
- } */ *ap = v;
- struct vnode *vp = ap->a_vp;
- struct inode *ip = VTOI(vp);
- mode_t mode = ap->a_mode;
- int error;
- error = ext2fs_check_possible(vp, ip, mode);
- if (error)
- return error;
- error = ext2fs_check_permitted(vp, ip, mode, ap->a_cred);
- return error;
- }
- /* ARGSUSED */
- int
- ext2fs_getattr(void *v)
- {
- struct vop_getattr_args /* {
- struct vnode *a_vp;
- struct vattr *a_vap;
- kauth_cred_t a_cred;
- } */ *ap = v;
- struct vnode *vp = ap->a_vp;
- struct inode *ip = VTOI(vp);
- struct vattr *vap = ap->a_vap;
- EXT2FS_ITIMES(ip, NULL, NULL, NULL);
- /*
- * Copy from inode table
- */
- vap->va_fsid = ip->i_dev;
- vap->va_fileid = ip->i_number;
- vap->va_mode = ip->i_e2fs_mode & ALLPERMS;
- vap->va_nlink = ip->i_e2fs_nlink;
- vap->va_uid = ip->i_uid;
- vap->va_gid = ip->i_gid;
- vap->va_rdev = (dev_t)fs2h32(ip->i_din.e2fs_din->e2di_rdev);
- vap->va_size = vp->v_size;
- vap->va_atime.tv_sec = ip->i_e2fs_atime;
- vap->va_atime.tv_nsec = 0;
- vap->va_mtime.tv_sec = ip->i_e2fs_mtime;
- vap->va_mtime.tv_nsec = 0;
- vap->va_ctime.tv_sec = ip->i_e2fs_ctime;
- vap->va_ctime.tv_nsec = 0;
- #ifdef EXT2FS_SYSTEM_FLAGS
- vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? SF_APPEND : 0;
- vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? SF_IMMUTABLE : 0;
- #else
- vap->va_flags = (ip->i_e2fs_flags & EXT2_APPEND) ? UF_APPEND : 0;
- vap->va_flags |= (ip->i_e2fs_flags & EXT2_IMMUTABLE) ? UF_IMMUTABLE : 0;
- #endif
- vap->va_gen = ip->i_e2fs_gen;
- /* this doesn't belong here */
- if (vp->v_type == VBLK)
- vap->va_blocksize = BLKDEV_IOSIZE;
- else if (vp->v_type == VCHR)
- vap->va_blocksize = MAXBSIZE;
- else
- vap->va_blocksize = vp->v_mount->mnt_stat.f_iosize;
- vap->va_bytes = dbtob((u_quad_t)ip->i_e2fs_nblock);
- vap->va_type = vp->v_type;
- vap->va_filerev = ip->i_modrev;
- return (0);
- }
- /*
- * Set attribute vnode op. called from several syscalls
- */
- int
- ext2fs_setattr(void *v)
- {
- struct vop_setattr_args /* {
- struct vnode *a_vp;
- struct vattr *a_vap;
- kauth_cred_t a_cred;
- } */ *ap = v;
- struct vattr *vap = ap->a_vap;
- struct vnode *vp = ap->a_vp;
- struct inode *ip = VTOI(vp);
- kauth_cred_t cred = ap->a_cred;
- struct lwp *l = curlwp;
- int error;
- /*
- * Check for unsettable attributes.
- */
- if ((vap->va_type != VNON) || (vap->va_nlink != (nlink_t)VNOVAL) ||
- (vap->va_fsid != VNOVAL) || (vap->va_fileid != VNOVAL) ||
- (vap->va_blocksize != VNOVAL) || (vap->va_rdev != VNOVAL) ||
- ((int)vap->va_bytes != VNOVAL) || (vap->va_gen != VNOVAL)) {
- return (EINVAL);
- }
- if (vap->va_flags != VNOVAL) {
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- if (kauth_cred_geteuid(cred) != ip->i_uid &&
- (error = kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
- NULL)))
- return (error);
- #ifdef EXT2FS_SYSTEM_FLAGS
- if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER,
- NULL) == 0) {
- if ((ip->i_e2fs_flags &
- (EXT2_APPEND | EXT2_IMMUTABLE)) &&
- kauth_authorize_system(l->l_cred,
- KAUTH_SYSTEM_CHSYSFLAGS, 0, NULL, NULL, NULL))
- return (EPERM);
- ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE);
- ip->i_e2fs_flags |=
- (vap->va_flags & SF_APPEND) ? EXT2_APPEND : 0 |
- (vap->va_flags & SF_IMMUTABLE) ? EXT2_IMMUTABLE : 0;
- } else
- return (EPERM);
- #else
- ip->i_e2fs_flags &= ~(EXT2_APPEND | EXT2_IMMUTABLE);
- ip->i_e2fs_flags |=
- (vap->va_flags & UF_APPEND) ? EXT2_APPEND : 0 |
- (vap->va_flags & UF_IMMUTABLE) ? EXT2_IMMUTABLE : 0;
- #endif
- ip->i_flag |= IN_CHANGE;
- if (vap->va_flags & (IMMUTABLE | APPEND))
- return (0);
- }
- if (ip->i_e2fs_flags & (EXT2_APPEND | EXT2_IMMUTABLE))
- return (EPERM);
- /*
- * Go through the fields and update iff not VNOVAL.
- */
- if (vap->va_uid != (uid_t)VNOVAL || vap->va_gid != (gid_t)VNOVAL) {
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- error = ext2fs_chown(vp, vap->va_uid, vap->va_gid, cred, l);
- if (error)
- return (error);
- }
- if (vap->va_size != VNOVAL) {
- /*
- * Disallow write attempts on read-only file systems;
- * unless the file is a socket, fifo, or a block or
- * character device resident on the file system.
- */
- switch (vp->v_type) {
- case VDIR:
- return (EISDIR);
- case VLNK:
- case VREG:
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- default:
- break;
- }
- error = ext2fs_truncate(vp, vap->va_size, 0, cred);
- if (error)
- return (error);
- }
- ip = VTOI(vp);
- if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- error = genfs_can_chtimes(vp, vap->va_vaflags, ip->i_uid, cred);
- if (error)
- return (error);
- if (vap->va_atime.tv_sec != VNOVAL)
- if (!(vp->v_mount->mnt_flag & MNT_NOATIME))
- ip->i_flag |= IN_ACCESS;
- if (vap->va_mtime.tv_sec != VNOVAL) {
- ip->i_flag |= IN_CHANGE | IN_UPDATE;
- if (vp->v_mount->mnt_flag & MNT_RELATIME)
- ip->i_flag |= IN_ACCESS;
- }
- error = ext2fs_update(vp, &vap->va_atime, &vap->va_mtime,
- UPDATE_WAIT);
- if (error)
- return (error);
- }
- error = 0;
- if (vap->va_mode != (mode_t)VNOVAL) {
- if (vp->v_mount->mnt_flag & MNT_RDONLY)
- return (EROFS);
- error = ext2fs_chmod(vp, (int)vap->va_mode, cred, l);
- }
- VN_KNOTE(vp, NOTE_ATTRIB);
- return (error);
- }
- /*
- * Change the mode on a file.
- * Inode must be locked before calling.
- */
- static int
- ext2fs_chmod(struct vnode *vp, int mode, kauth_cred_t cred, struct lwp *l)
- {
- struct inode *ip = VTOI(vp);
- int error;
- error = genfs_can_chmod(vp, cred, ip->i_uid, ip->i_gid, mode);
- if (error)
- return (error);
- ip->i_e2fs_mode &= ~ALLPERMS;
- ip->i_e2fs_mode |= (mode & ALLPERMS);
- ip->i_flag |= IN_CHANGE;
- return (0);
- }
- /*
- * Perform chown operation on inode ip;
- * inode must be locked prior to call.
- */
- static int
- ext2fs_chown(struct vnode *vp, uid_t uid, gid_t gid, kauth_cred_t cred,
- struct lwp *l)
- {
- struct inode *ip = VTOI(vp);
- uid_t ouid;
- gid_t ogid;
- int error;
- if (uid == (uid_t)VNOVAL)
- uid = ip->i_uid;
- if (gid == (gid_t)VNOVAL)
- gid = ip->i_gid;
- error = genfs_can_chown(vp, cred, ip->i_uid, ip->i_gid, uid, gid);
- if (error)
- return (error);
- ogid = ip->i_gid;
- ouid = ip->i_uid;
- ip->i_e2fs_gid = gid & 0xffff;
- ip->i_e2fs_uid = uid & 0xffff;
- if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0) {
- ip->i_e2fs_gid_high = (gid >> 16) & 0xffff;
- ip->i_e2fs_uid_high = (uid >> 16) & 0xffff;
- } else {
- ip->i_e2fs_gid_high = 0;
- ip->i_e2fs_uid_high = 0;
- }
- if (ouid != uid || ogid != gid) {
- ext2fs_set_inode_guid(ip);
- ip->i_flag |= IN_CHANGE;
- }
- if (ouid != uid && kauth_authorize_generic(cred,
- KAUTH_GENERIC_ISSUSER, NULL) != 0)
- ip->i_e2fs_mode &= ~ISUID;
- if (ogid != gid && kauth_authorize_generic(cred,
- KAUTH_GENERIC_ISSUSER, NULL) != 0)
- ip->i_e2fs_mode &= ~ISGID;
- return (0);
- }
- int
- ext2fs_remove(void *v)
- {
- struct vop_remove_args /* {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- } */ *ap = v;
- struct inode *ip;
- struct vnode *vp = ap->a_vp;
- struct vnode *dvp = ap->a_dvp;
- struct ufs_lookup_results *ulr;
- int error;
- /* XXX should handle this material another way */
- ulr = &VTOI(dvp)->i_crap;
- UFS_CHECK_CRAPCOUNTER(VTOI(dvp));
- ip = VTOI(vp);
- if (vp->v_type == VDIR ||
- (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) ||
- (VTOI(dvp)->i_e2fs_flags & EXT2_APPEND)) {
- error = EPERM;
- } else {
- error = ext2fs_dirremove(dvp, ulr, ap->a_cnp);
- if (error == 0) {
- ip->i_e2fs_nlink--;
- ip->i_flag |= IN_CHANGE;
- }
- }
- VN_KNOTE(vp, NOTE_DELETE);
- VN_KNOTE(dvp, NOTE_WRITE);
- if (dvp == vp)
- vrele(vp);
- else
- vput(vp);
- vput(dvp);
- return (error);
- }
- /*
- * ext2fs_link: create hard link.
- */
- int
- ext2fs_link(void *v)
- {
- struct vop_link_args /* {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- } */ *ap = v;
- struct vnode *dvp = ap->a_dvp;
- struct vnode *vp = ap->a_vp;
- struct componentname *cnp = ap->a_cnp;
- struct inode *ip;
- int error;
- struct ufs_lookup_results *ulr;
- KASSERT(dvp != vp);
- KASSERT(vp->v_type != VDIR);
- KASSERT(dvp->v_mount == vp->v_mount);
- /* XXX should handle this material another way */
- ulr = &VTOI(dvp)->i_crap;
- UFS_CHECK_CRAPCOUNTER(VTOI(dvp));
- error = vn_lock(vp, LK_EXCLUSIVE);
- if (error) {
- VOP_ABORTOP(dvp, cnp);
- goto out2;
- }
- ip = VTOI(vp);
- if ((nlink_t)ip->i_e2fs_nlink >= LINK_MAX) {
- VOP_ABORTOP(dvp, cnp);
- error = EMLINK;
- goto out1;
- }
- if (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) {
- VOP_ABORTOP(dvp, cnp);
- error = EPERM;
- goto out1;
- }
- ip->i_e2fs_nlink++;
- ip->i_flag |= IN_CHANGE;
- error = ext2fs_update(vp, NULL, NULL, UPDATE_WAIT);
- if (!error)
- error = ext2fs_direnter(ip, dvp, ulr, cnp);
- if (error) {
- ip->i_e2fs_nlink--;
- ip->i_flag |= IN_CHANGE;
- }
- out1:
- VOP_UNLOCK(vp);
- out2:
- VN_KNOTE(vp, NOTE_LINK);
- VN_KNOTE(dvp, NOTE_WRITE);
- vput(dvp);
- return (error);
- }
- /*
- * Rename system call.
- * rename("foo", "bar");
- * is essentially
- * unlink("bar");
- * link("foo", "bar");
- * unlink("foo");
- * but ``atomically''. Can't do full commit without saving state in the
- * inode on disk which isn't feasible at this time. Best we can do is
- * always guarantee the target exists.
- *
- * Basic algorithm is:
- *
- * 1) Bump link count on source while we're linking it to the
- * target. This also ensure the inode won't be deleted out
- * from underneath us while we work (it may be truncated by
- * a concurrent `trunc' or `open' for creation).
- * 2) Link source to destination. If destination already exists,
- * delete it first.
- * 3) Unlink source reference to inode if still around. If a
- * directory was moved and the parent of the destination
- * is different from the source, patch the ".." entry in the
- * directory.
- */
- int
- ext2fs_rename(void *v)
- {
- struct vop_rename_args /* {
- struct vnode *a_fdvp;
- struct vnode *a_fvp;
- struct componentname *a_fcnp;
- struct vnode *a_tdvp;
- struct vnode *a_tvp;
- struct componentname *a_tcnp;
- } */ *ap = v;
- struct vnode *tvp = ap->a_tvp;
- struct vnode *tdvp = ap->a_tdvp;
- struct vnode *fvp = ap->a_fvp;
- struct vnode *fdvp = ap->a_fdvp;
- struct componentname *tcnp = ap->a_tcnp;
- struct componentname *fcnp = ap->a_fcnp;
- struct inode *ip, *xp, *dp;
- struct ext2fs_dirtemplate dirbuf;
- int doingdirectory = 0, oldparent = 0, newparent = 0;
- int error = 0;
- u_char namlen;
- /*
- * Check for cross-device rename.
- */
- if ((fvp->v_mount != tdvp->v_mount) ||
- (tvp && (fvp->v_mount != tvp->v_mount))) {
- error = EXDEV;
- abortit:
- VOP_ABORTOP(tdvp, tcnp); /* XXX, why not in NFS? */
- if (tdvp == tvp)
- vrele(tdvp);
- else
- vput(tdvp);
- if (tvp)
- vput(tvp);
- VOP_ABORTOP(fdvp, fcnp); /* XXX, why not in NFS? */
- vrele(fdvp);
- vrele(fvp);
- return (error);
- }
- /*
- * Check if just deleting a link name.
- */
- if (tvp && ((VTOI(tvp)->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) ||
- (VTOI(tdvp)->i_e2fs_flags & EXT2_APPEND))) {
- error = EPERM;
- goto abortit;
- }
- if (fvp == tvp) {
- if (fvp->v_type == VDIR) {
- error = EINVAL;
- goto abortit;
- }
- /* Release destination completely. */
- VOP_ABORTOP(tdvp, tcnp);
- vput(tdvp);
- vput(tvp);
- /* Delete source. */
- vrele(fvp);
- fcnp->cn_flags &= ~(MODMASK);
- fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
- fcnp->cn_nameiop = DELETE;
- vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY);
- if ((error = relookup(fdvp, &fvp, fcnp, 0))) {
- vput(fdvp);
- return (error);
- }
- return (VOP_REMOVE(fdvp, fvp, fcnp));
- }
- if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0)
- goto abortit;
- dp = VTOI(fdvp);
- ip = VTOI(fvp);
- if ((nlink_t) ip->i_e2fs_nlink >= LINK_MAX) {
- VOP_UNLOCK(fvp);
- error = EMLINK;
- goto abortit;
- }
- if ((ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND)) ||
- (dp->i_e2fs_flags & EXT2_APPEND)) {
- VOP_UNLOCK(fvp);
- error = EPERM;
- goto abortit;
- }
- if ((ip->i_e2fs_mode & IFMT) == IFDIR) {
- error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred);
- if (!error && tvp)
- error = VOP_ACCESS(tvp, VWRITE, tcnp->cn_cred);
- if (error) {
- VOP_UNLOCK(fvp);
- error = EACCES;
- goto abortit;
- }
- /*
- * Avoid ".", "..", and aliases of "." for obvious reasons.
- */
- if ((fcnp->cn_namelen == 1 && fcnp->cn_nameptr[0] == '.') ||
- dp == ip ||
- (fcnp->cn_flags & ISDOTDOT) ||
- (tcnp->cn_flags & ISDOTDOT) ||
- (ip->i_flag & IN_RENAME)) {
- VOP_UNLOCK(fvp);
- error = EINVAL;
- goto abortit;
- }
- ip->i_flag |= IN_RENAME;
- oldparent = dp->i_number;
- doingdirectory = 1;
- }
- VN_KNOTE(fdvp, NOTE_WRITE); /* XXXLUKEM/XXX: right place? */
- /*
- * When the target exists, both the directory
- * and target vnodes are returned locked.
- */
- dp = VTOI(tdvp);
- xp = NULL;
- if (tvp)
- xp = VTOI(tvp);
- /*
- * 1) Bump link count while we're moving stuff
- * around. If we crash somewhere before
- * completing our work, the link count
- * may be wrong, but correctable.
- */
- ip->i_e2fs_nlink++;
- ip->i_flag |= IN_CHANGE;
- if ((error = ext2fs_update(fvp, NULL, NULL, UPDATE_WAIT)) != 0) {
- VOP_UNLOCK(fvp);
- goto bad;
- }
- /*
- * If ".." must be changed (ie the directory gets a new
- * parent) then the source directory must not be in the
- * directory hierarchy above the target, as this would
- * orphan everything below the source directory. Also
- * the user must have write permission in the source so
- * as to be able to change "..". We must repeat the call
- * to namei, as the parent directory is unlocked by the
- * call to checkpath().
- */
- error = VOP_ACCESS(fvp, VWRITE, tcnp->cn_cred);
- VOP_UNLOCK(fvp);
- if (oldparent != dp->i_number)
- newparent = dp->i_number;
- if (doingdirectory && newparent) {
- if (error) /* write access check above */
- goto bad;
- if (xp != NULL)
- vput(tvp);
- vref(tdvp); /* compensate for the ref checkpath loses */
- error = ext2fs_checkpath(ip, dp, tcnp->cn_cred);
- if (error != 0) {
- vrele(tdvp);
- goto out;
- }
- vn_lock(tdvp, LK_EXCLUSIVE | LK_RETRY);
- if ((error = relookup(tdvp, &tvp, tcnp, 0)) != 0) {
- vput(tdvp);
- goto out;
- }
- dp = VTOI(tdvp);
- xp = NULL;
- if (tvp)
- xp = VTOI(tvp);
- }
- /*
- * 2) If target doesn't exist, link the target
- * to the source and unlink the source.
- * Otherwise, rewrite the target directory
- * entry to reference the source inode and
- * expunge the original entry's existence.
- */
- if (xp == NULL) {
- if (dp->i_dev != ip->i_dev)
- panic("rename: EXDEV");
- /*
- * Account for ".." in new directory.
- * When source and destination have the same
- * parent we don't fool with the link count.
- */
- if (doingdirectory && newparent) {
- if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) {
- error = EMLINK;
- goto bad;
- }
- dp->i_e2fs_nlink++;
- dp->i_flag |= IN_CHANGE;
- if ((error = ext2fs_update(tdvp, NULL, NULL,
- UPDATE_WAIT)) != 0)
- goto bad;
- }
- error = ext2fs_direnter(ip, tdvp, &VTOI(tdvp)->i_crap, tcnp);
- if (error != 0) {
- if (doingdirectory && newparent) {
- dp->i_e2fs_nlink--;
- dp->i_flag |= IN_CHANGE;
- (void)ext2fs_update(tdvp, NULL, NULL,
- UPDATE_WAIT);
- }
- goto bad;
- }
- VN_KNOTE(tdvp, NOTE_WRITE);
- vput(tdvp);
- } else {
- if (xp->i_dev != dp->i_dev || xp->i_dev != ip->i_dev)
- panic("rename: EXDEV");
- /*
- * Short circuit rename(foo, foo).
- */
- if (xp->i_number == ip->i_number)
- panic("rename: same file");
- /*
- * If the parent directory is "sticky", then the user must
- * own the parent directory, or the destination of the rename,
- * otherwise the destination may not be changed (except by
- * root). This implements append-only directories.
- */
- if ((dp->i_e2fs_mode & S_ISTXT) &&
- kauth_authorize_generic(tcnp->cn_cred,
- KAUTH_GENERIC_ISSUSER, NULL) != 0 &&
- kauth_cred_geteuid(tcnp->cn_cred) != dp->i_uid &&
- xp->i_uid != kauth_cred_geteuid(tcnp->cn_cred)) {
- error = EPERM;
- goto bad;
- }
- /*
- * Target must be empty if a directory and have no links
- * to it. Also, ensure source and target are compatible
- * (both directories, or both not directories).
- */
- if ((xp->i_e2fs_mode & IFMT) == IFDIR) {
- if (!ext2fs_dirempty(xp, dp->i_number, tcnp->cn_cred) ||
- xp->i_e2fs_nlink > 2) {
- error = ENOTEMPTY;
- goto bad;
- }
- if (!doingdirectory) {
- error = ENOTDIR;
- goto bad;
- }
- cache_purge(tdvp);
- } else if (doingdirectory) {
- error = EISDIR;
- goto bad;
- }
- error = ext2fs_dirrewrite(dp, &dp->i_crap, ip, tcnp);
- if (error != 0)
- goto bad;
- /*
- * If the target directory is in the same
- * directory as the source directory,
- * decrement the link count on the parent
- * of the target directory.
- */
- if (doingdirectory && !newparent) {
- dp->i_e2fs_nlink--;
- dp->i_flag |= IN_CHANGE;
- }
- /*
- * Adjust the link count of the target to
- * reflect the dirrewrite above. If this is
- * a directory it is empty and there are
- * no links to it, so we can squash the inode and
- * any space associated with it. We disallowed
- * renaming over top of a directory with links to
- * it above, as the remaining link would point to
- * a directory without "." or ".." entries.
- */
- xp->i_e2fs_nlink--;
- if (doingdirectory) {
- if (--xp->i_e2fs_nlink != 0)
- panic("rename: linked directory");
- error = ext2fs_truncate(tvp, (off_t)0, IO_SYNC,
- tcnp->cn_cred);
- }
- xp->i_flag |= IN_CHANGE;
- VN_KNOTE(tdvp, NOTE_WRITE);
- vput(tdvp);
- VN_KNOTE(tvp, NOTE_DELETE);
- vput(tvp);
- xp = NULL;
- }
- /*
- * 3) Unlink the source.
- */
- fcnp->cn_flags &= ~(MODMASK);
- fcnp->cn_flags |= LOCKPARENT | LOCKLEAF;
- vn_lock(fdvp, LK_EXCLUSIVE | LK_RETRY);
- if ((error = relookup(fdvp, &fvp, fcnp, 0))) {
- vput(fdvp);
- vrele(ap->a_fvp);
- return (error);
- }
- if (fvp != NULL) {
- xp = VTOI(fvp);
- dp = VTOI(fdvp);
- } else {
- /*
- * From name has disappeared.
- */
- if (doingdirectory)
- panic("ext2fs_rename: lost dir entry");
- vrele(ap->a_fvp);
- return (0);
- }
- /*
- * Ensure that the directory entry still exists and has not
- * changed while the new name has been entered. If the source is
- * a file then the entry may have been unlinked or renamed. In
- * either case there is no further work to be done. If the source
- * is a directory then it cannot have been rmdir'ed; its link
- * count of three would cause a rmdir to fail with ENOTEMPTY.
- * The IRENAME flag ensures that it cannot be moved by another
- * rename.
- */
- if (xp != ip) {
- if (doingdirectory)
- panic("ext2fs_rename: lost dir entry");
- } else {
- /*
- * If the source is a directory with a
- * new parent, the link count of the old
- * parent directory must be decremented
- * and ".." set to point to the new parent.
- */
- if (doingdirectory && newparent) {
- KASSERT(dp != NULL);
- dp->i_e2fs_nlink--;
- dp->i_flag |= IN_CHANGE;
- error = vn_rdwr(UIO_READ, fvp, (void *)&dirbuf,
- sizeof (struct ext2fs_dirtemplate), (off_t)0,
- UIO_SYSSPACE, IO_NODELOCKED,
- tcnp->cn_cred, (size_t *)0, NULL);
- if (error == 0) {
- namlen = dirbuf.dotdot_namlen;
- if (namlen != 2 ||
- dirbuf.dotdot_name[0] != '.' ||
- dirbuf.dotdot_name[1] != '.') {
- ufs_dirbad(xp, (doff_t)12,
- "ext2fs_rename: mangled dir");
- } else {
- dirbuf.dotdot_ino = h2fs32(newparent);
- (void) vn_rdwr(UIO_WRITE, fvp,
- (void *)&dirbuf,
- sizeof (struct dirtemplate),
- (off_t)0, UIO_SYSSPACE,
- IO_NODELOCKED|IO_SYNC,
- tcnp->cn_cred, (size_t *)0,
- NULL);
- cache_purge(fdvp);
- }
- }
- }
- error = ext2fs_dirremove(fdvp, &VTOI(fdvp)->i_crap, fcnp);
- if (!error) {
- xp->i_e2fs_nlink--;
- xp->i_flag |= IN_CHANGE;
- }
- xp->i_flag &= ~IN_RENAME;
- }
- VN_KNOTE(fvp, NOTE_RENAME);
- if (dp)
- vput(fdvp);
- if (xp)
- vput(fvp);
- vrele(ap->a_fvp);
- return (error);
- bad:
- if (xp)
- vput(ITOV(xp));
- vput(ITOV(dp));
- out:
- if (doingdirectory)
- ip->i_flag &= ~IN_RENAME;
- if (vn_lock(fvp, LK_EXCLUSIVE) == 0) {
- ip->i_e2fs_nlink--;
- ip->i_flag |= IN_CHANGE;
- vput(fvp);
- } else
- vrele(fvp);
- vrele(fdvp);
- return (error);
- }
- /*
- * Mkdir system call
- */
- int
- ext2fs_mkdir(void *v)
- {
- struct vop_mkdir_args /* {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- } */ *ap = v;
- struct vnode *dvp = ap->a_dvp;
- struct vattr *vap = ap->a_vap;
- struct componentname *cnp = ap->a_cnp;
- struct inode *ip, *dp = VTOI(dvp);
- struct vnode *tvp;
- struct ext2fs_dirtemplate dirtemplate;
- int error, dmode;
- struct ufs_lookup_results *ulr;
- /* XXX should handle this material another way */
- ulr = &VTOI(dvp)->i_crap;
- UFS_CHECK_CRAPCOUNTER(VTOI(dvp));
- if ((nlink_t)dp->i_e2fs_nlink >= LINK_MAX) {
- error = EMLINK;
- goto out;
- }
- dmode = vap->va_mode & ACCESSPERMS;
- dmode |= IFDIR;
- /*
- * Must simulate part of ext2fs_makeinode here to acquire the inode,
- * but not have it entered in the parent directory. The entry is
- * made later after writing "." and ".." entries.
- */
- if ((error = ext2fs_valloc(dvp, dmode, cnp->cn_cred, &tvp)) != 0)
- goto out;
- ip = VTOI(tvp);
- ip->i_uid = kauth_cred_geteuid(cnp->cn_cred);
- ip->i_e2fs_uid = ip->i_uid & 0xffff;
- ip->i_e2fs_gid = dp->i_e2fs_gid;
- if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0) {
- ip->i_e2fs_uid_high = (ip->i_uid >> 16) & 0xffff;
- ip->i_e2fs_gid_high = dp->i_e2fs_gid_high;
- } else {
- ip->i_e2fs_uid_high = 0;
- ip->i_e2fs_gid_high = 0;
- }
- ip->i_gid = ip->i_e2fs_gid | (ip->i_e2fs_gid_high << 16);
- ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
- ip->i_e2fs_mode = dmode;
- tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */
- ip->i_e2fs_nlink = 2;
- /*
- * Bump link count in parent directory
- * to reflect work done below. Should
- * be done before reference is created
- * so reparation is possible if we crash.
- */
- dp->i_e2fs_nlink++;
- dp->i_flag |= IN_CHANGE;
- if ((error = ext2fs_update(dvp, NULL, NULL, UPDATE_DIROP)) != 0)
- goto bad;
- /* Initialize directory with "." and ".." from static template. */
- memset(&dirtemplate, 0, sizeof(dirtemplate));
- dirtemplate.dot_ino = h2fs32(ip->i_number);
- dirtemplate.dot_reclen = h2fs16(12);
- dirtemplate.dot_namlen = 1;
- if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0 &&
- (ip->i_e2fs->e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) {
- dirtemplate.dot_type = EXT2_FT_DIR;
- }
- dirtemplate.dot_name[0] = '.';
- dirtemplate.dotdot_ino = h2fs32(dp->i_number);
- dirtemplate.dotdot_reclen = h2fs16(VTOI(dvp)->i_e2fs->e2fs_bsize - 12);
- dirtemplate.dotdot_namlen = 2;
- if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0 &&
- (ip->i_e2fs->e2fs.e2fs_features_incompat & EXT2F_INCOMPAT_FTYPE)) {
- dirtemplate.dotdot_type = EXT2_FT_DIR;
- }
- dirtemplate.dotdot_name[0] = dirtemplate.dotdot_name[1] = '.';
- error = vn_rdwr(UIO_WRITE, tvp, (void *)&dirtemplate,
- sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
- IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (size_t *)0, NULL);
- if (error) {
- dp->i_e2fs_nlink--;
- dp->i_flag |= IN_CHANGE;
- goto bad;
- }
- if (VTOI(dvp)->i_e2fs->e2fs_bsize > dvp->v_mount->mnt_stat.f_bsize)
- panic("ext2fs_mkdir: blksize"); /* XXX should grow with balloc() */
- else {
- error = ext2fs_setsize(ip, VTOI(dvp)->i_e2fs->e2fs_bsize);
- if (error) {
- dp->i_e2fs_nlink--;
- dp->i_flag |= IN_CHANGE;
- goto bad;
- }
- ip->i_flag |= IN_CHANGE;
- uvm_vnp_setsize(tvp, ext2fs_size(ip));
- }
- /* Directory set up, now install it's entry in the parent directory. */
- error = ext2fs_direnter(ip, dvp, ulr, cnp);
- if (error != 0) {
- dp->i_e2fs_nlink--;
- dp->i_flag |= IN_CHANGE;
- }
- bad:
- /*
- * No need to do an explicit ext2fs_truncate here, vrele will do this
- * for us because we set the link count to 0.
- */
- if (error) {
- ip->i_e2fs_nlink = 0;
- ip->i_flag |= IN_CHANGE;
- vput(tvp);
- } else {
- VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
- *ap->a_vpp = tvp;
- }
- out:
- vput(dvp);
- return (error);
- }
- /*
- * Rmdir system call.
- */
- int
- ext2fs_rmdir(void *v)
- {
- struct vop_rmdir_args /* {
- struct vnode *a_dvp;
- struct vnode *a_vp;
- struct componentname *a_cnp;
- } */ *ap = v;
- struct vnode *vp = ap->a_vp;
- struct vnode *dvp = ap->a_dvp;
- struct componentname *cnp = ap->a_cnp;
- struct inode *ip, *dp;
- int error;
- struct ufs_lookup_results *ulr;
- ip = VTOI(vp);
- dp = VTOI(dvp);
- /* XXX should handle this material another way */
- ulr = &dp->i_crap;
- UFS_CHECK_CRAPCOUNTER(dp);
- /*
- * No rmdir "." please.
- */
- if (dp == ip) {
- vrele(dvp);
- vput(vp);
- return (EINVAL);
- }
- /*
- * Verify the directory is empty (and valid).
- * (Rmdir ".." won't be valid since
- * ".." will contain a reference to
- * the current directory and thus be
- * non-empty.)
- */
- error = 0;
- if (ip->i_e2fs_nlink != 2 ||
- !ext2fs_dirempty(ip, dp->i_number, cnp->cn_cred)) {
- error = ENOTEMPTY;
- goto out;
- }
- if ((dp->i_e2fs_flags & EXT2_APPEND) ||
- (ip->i_e2fs_flags & (EXT2_IMMUTABLE | EXT2_APPEND))) {
- error = EPERM;
- goto out;
- }
- /*
- * Delete reference to directory before purging
- * inode. If we crash in between, the directory
- * will be reattached to lost+found,
- */
- error = ext2fs_dirremove(dvp, ulr, cnp);
- if (error != 0)
- goto out;
- dp->i_e2fs_nlink--;
- dp->i_flag |= IN_CHANGE;
- VN_KNOTE(dvp, NOTE_WRITE | NOTE_LINK);
- cache_purge(dvp);
- vput(dvp);
- dvp = NULL;
- /*
- * Truncate inode. The only stuff left
- * in the directory is "." and "..". The
- * "." reference is inconsequential since
- * we're quashing it. The ".." reference
- * has already been adjusted above. We've
- * removed the "." reference and the reference
- * in the parent directory, but there may be
- * other hard links so decrement by 2 and
- * worry about them later.
- */
- ip->i_e2fs_nlink -= 2;
- error = ext2fs_truncate(vp, (off_t)0, IO_SYNC, cnp->cn_cred);
- cache_purge(ITOV(ip));
- out:
- VN_KNOTE(vp, NOTE_DELETE);
- if (dvp)
- vput(dvp);
- vput(vp);
- return (error);
- }
- /*
- * symlink -- make a symbolic link
- */
- int
- ext2fs_symlink(void *v)
- {
- struct vop_symlink_args /* {
- struct vnode *a_dvp;
- struct vnode **a_vpp;
- struct componentname *a_cnp;
- struct vattr *a_vap;
- char *a_target;
- } */ *ap = v;
- struct vnode *vp, **vpp;
- struct inode *ip;
- int len, error;
- vpp = ap->a_vpp;
- error = ext2fs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp,
- vpp, ap->a_cnp);
- if (error)
- return (error);
- VN_KNOTE(ap->a_dvp, NOTE_WRITE);
- vp = *vpp;
- len = strlen(ap->a_target);
- ip = VTOI(vp);
- if (len < ip->i_ump->um_maxsymlinklen) {
- memcpy((char *)ip->i_din.e2fs_din->e2di_shortlink, ap->a_target, len);
- error = ext2fs_setsize(ip, len);
- if (error)
- goto bad;
- ip->i_flag |= IN_CHANGE | IN_UPDATE;
- if (vp->v_mount->mnt_flag & MNT_RELATIME)
- ip->i_flag |= IN_ACCESS;
- uvm_vnp_setsize(vp, len);
- } else
- error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0,
- UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred,
- (size_t *)0, NULL);
- bad:
- if (error)
- vput(vp);
- return (error);
- }
- /*
- * Return target name of a symbolic link
- */
- int
- ext2fs_readlink(void *v)
- {
- struct vop_readlink_args /* {
- struct vnode *a_vp;
- struct uio *a_uio;
- kauth_cred_t a_cred;
- } */ *ap = v;
- struct vnode *vp = ap->a_vp;
- struct inode *ip = VTOI(vp);
- struct ufsmount *ump = ip->i_ump;
- int isize;
- isize = ext2fs_size(ip);
- if (isize < ump->um_maxsymlinklen ||
- (ump->um_maxsymlinklen == 0 && ip->i_e2fs_nblock == 0)) {
- uiomove((char *)ip->i_din.e2fs_din->e2di_shortlink, isize, ap->a_uio);
- return (0);
- }
- return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred));
- }
- /*
- * Advisory record locking support
- */
- int
- ext2fs_advlock(void *v)
- {
- struct vop_advlock_args /* {
- struct vnode *a_vp;
- void * a_id;
- int a_op;
- struct flock *a_fl;
- int a_flags;
- } */ *ap = v;
- struct inode *ip = VTOI(ap->a_vp);
- return lf_advlock(ap, &ip->i_lockf, ext2fs_size(ip));
- }
- int
- ext2fs_fsync(void *v)
- {
- struct vop_fsync_args /* {
- struct vnode *a_vp;
- kauth_cred_t a_cred;
- int a_flags;
- off_t offlo;
- off_t offhi;
- struct proc *a_p;
- } */ *ap = v;
- struct vnode *vp = ap->a_vp;
- int wait;
- int error;
- wait = (ap->a_flags & FSYNC_WAIT) != 0;
- if (vp->v_type == VBLK)
- error = spec_fsync(v);
- else
- error = vflushbuf(vp, wait);
- if (error == 0 && (ap->a_flags & FSYNC_DATAONLY) == 0)
- error = ext2fs_update(vp, NULL, NULL, wait ? UPDATE_WAIT : 0);
- if (error == 0 && ap->a_flags & FSYNC_CACHE) {
- int l = 0;
- error = VOP_IOCTL(VTOI(vp)->i_devvp, DIOCCACHESYNC, &l, FWRITE,
- curlwp->l_cred);
- }
- return error;
- }
- /*
- * Initialize the vnode associated with a new inode, handle aliased
- * vnodes.
- */
- int
- ext2fs_vinit(struct mount *mntp, int (**specops)(void *),
- int (**fifoops)(void *), struct vnode **vpp)
- {
- struct timeval tv;
- struct inode *ip;
- struct vnode *vp;
- vp = *vpp;
- ip = VTOI(vp);
- switch(vp->v_type = IFTOVT(ip->i_e2fs_mode)) {
- case VCHR:
- case VBLK:
- vp->v_op = specops;
- spec_node_init(vp, fs2h32(ip->i_din.e2fs_din->e2di_rdev));
- break;
- case VFIFO:
- vp->v_op = fifoops;
- break;
- case VNON:
- case VBAD:
- case VSOCK:
- case VLNK:
- case VDIR:
- case VREG:
- break;
- }
- if (ip->i_number == ROOTINO)
- vp->v_vflag |= VV_ROOT;
- /*
- * Initialize modrev times
- */
- getmicrouptime(&tv);
- SETHIGH(ip->i_modrev, tv.tv_sec);
- SETLOW(ip->i_modrev, tv.tv_usec * 4294);
- *vpp = vp;
- return (0);
- }
- /*
- * Allocate a new inode.
- */
- int
- ext2fs_makeinode(int mode, struct vnode *dvp, struct vnode **vpp,
- struct componentname *cnp)
- {
- struct inode *ip, *pdir;
- struct vnode *tvp;
- int error, ismember = 0;
- struct ufs_lookup_results *ulr;
- pdir = VTOI(dvp);
- /* XXX should handle this material another way */
- ulr = &pdir->i_crap;
- UFS_CHECK_CRAPCOUNTER(pdir);
- *vpp = NULL;
- if ((mode & IFMT) == 0)
- mode |= IFREG;
- if ((error = ext2fs_valloc(dvp, mode, cnp->cn_cred, &tvp)) != 0) {
- vput(dvp);
- return (error);
- }
- ip = VTOI(tvp);
- ip->i_uid = kauth_cred_geteuid(cnp->cn_cred);
- ip->i_e2fs_uid = ip->i_uid & 0xffff;
- ip->i_e2fs_gid = pdir->i_e2fs_gid;
- if (ip->i_e2fs->e2fs.e2fs_rev > E2FS_REV0) {
- ip->i_e2fs_uid_high = (ip->i_uid >> 16) & 0xffff;
- ip->i_e2fs_gid_high = pdir->i_e2fs_gid_high;
- } else {
- ip->i_e2fs_uid_high = 0;
- ip->i_e2fs_gid_high = 0;
- }
- ip->i_gid = ip->i_e2fs_gid | (ip->i_e2fs_gid_high << 16);
- ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE;
- ip->i_e2fs_mode = mode;
- tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */
- ip->i_e2fs_nlink = 1;
- if ((ip->i_e2fs_mode & ISGID) && (kauth_cred_ismember_gid(cnp->cn_cred,
- ip->i_gid, &ismember) != 0 || !ismember) &&
- kauth_authorize_generic(cnp->cn_cred, KAUTH_GENERIC_ISSUSER, NULL))
- ip->i_e2fs_mode &= ~ISGID;
- /*
- * Make sure inode goes to disk before directory entry.
- */
- if ((error = ext2fs_update(tvp, NULL, NULL, UPDATE_WAIT)) != 0)
- goto bad;
- error = ext2fs_direnter(ip, dvp, ulr, cnp);
- if (error != 0)
- goto bad;
- vput(dvp);
- *vpp = tvp;
- return (0);
- bad:
- /*
- * Write error occurred trying to update the inode
- * or the directory so must deallocate the inode.
- */
- tvp->v_type = VNON; /* Stop explosion if VBLK */
- ip->i_e2fs_nlink = 0;
- ip->i_flag |= IN_CHANGE;
- vput(tvp);
- vput(dvp);
- return (error);
- }
- /*
- * Reclaim an inode so that it can be used for other purposes.
- */
- int
- ext2fs_reclaim(void *v)
- {
- struct vop_reclaim_args /* {
- struct vnode *a_vp;
- } */ *ap = v;
- struct vnode *vp = ap->a_vp;
- struct inode *ip = VTOI(vp);
- int error;
- /*
- * The inode must be freed and updated before being removed
- * from its hash chain. Other threads trying to gain a hold
- * on the inode will be stalled because it is locked (VI_XLOCK).
- */
- if (ip->i_omode == 1 && (vp->v_mount->mnt_flag & MNT_RDONLY) == 0)
- ext2fs_vfree(vp, ip->i_number, ip->i_e2fs_mode);
- if ((error = ufs_reclaim(vp)) != 0)
- return (error);
- if (ip->i_din.e2fs_din != NULL)
- pool_put(&ext2fs_dinode_pool, ip->i_din.e2fs_din);
- genfs_node_destroy(vp);
- pool_put(&ext2fs_inode_pool, vp->v_data);
- vp->v_data = NULL;
- return (0);
- }
- /* Global vfs data structures for ext2fs. */
- int (**ext2fs_vnodeop_p)(void *);
- const struct vnodeopv_entry_desc ext2fs_vnodeop_entries[] = {
- { &vop_default_desc, vn_default_error },
- { &vop_lookup_desc, ext2fs_lookup }, /* lookup */
- { &vop_create_desc, ext2fs_create }, /* create */
- { &vop_mknod_desc, ext2fs_mknod }, /* mknod */
- { &vop_open_desc, ext2fs_open }, /* open */
- { &vop_close_desc, ufs_close }, /* close */
- { &vop_access_desc, ext2fs_access }, /* access */
- { &vop_getattr_desc, ext2fs_getattr }, /* getattr */
- { &vop_setattr_desc, ext2fs_setattr }, /* setattr */
- { &vop_read_desc, ext2fs_read }, /* read */
- { &vop_write_desc, ext2fs_write }, /* write */
- { &vop_ioctl_desc, ufs_ioctl }, /* ioctl */
- { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
- { &vop_poll_desc, ufs_poll }, /* poll */
- { &vop_kqfilter_desc, genfs_kqfilter }, /* kqfilter */
- { &vop_revoke_desc, ufs_revoke }, /* revoke */
- { &vop_mmap_desc, ufs_mmap }, /* mmap */
- { &vop_fsync_desc, ext2fs_fsync }, /* fsync */
- { &vop_seek_desc, ufs_seek }, /* seek */
- { &vop_remove_desc, ext2fs_remove }, /* remove */
- { &vop_link_desc, ext2fs_link }, /* link */
- { &vop_rename_desc, ext2fs_rename }, /* rename */
- { &vop_mkdir_desc, ext2fs_mkdir }, /* mkdir */
- { &vop_rmdir_desc, ext2fs_rmdir }, /* rmdir */
- { &vop_symlink_desc, ext2fs_symlink }, /* symlink */
- { &vop_readdir_desc, ext2fs_readdir }, /* readdir */
- { &vop_readlink_desc, ext2fs_readlink }, /* readlink */
- { &vop_abortop_desc, ufs_abortop }, /* abortop */
- { &vop_inactive_desc, ext2fs_inactive }, /* inactive */
- { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */
- { &vop_lock_desc, ufs_lock }, /* lock */
- { &vop_unlock_desc, ufs_unlock }, /* unlock */
- { &vop_bmap_desc, ext2fs_bmap }, /* bmap */
- { &vop_strategy_desc, ufs_strategy }, /* strategy */
- { &vop_print_desc, ufs_print }, /* print */
- { &vop_islocked_desc, ufs_islocked }, /* islocked */
- { &vop_pathconf_desc, ufs_pathconf }, /* pathconf */
- { &vop_advlock_desc, ext2fs_advlock }, /* advlock */
- { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
- { &vop_getpages_desc, genfs_getpages }, /* getpages */
- { &vop_putpages_desc, genfs_putpages }, /* putpages */
- { NULL, NULL }
- };
- const struct vnodeopv_desc ext2fs_vnodeop_opv_desc =
- { &ext2fs_vnodeop_p, ext2fs_vnodeop_entries };
- int (**ext2fs_specop_p)(void *);
- const struct vnodeopv_entry_desc ext2fs_specop_entries[] = {
- { &vop_default_desc, vn_default_error },
- { &vop_lookup_desc, spec_lookup }, /* lookup */
- { &vop_create_desc, spec_create }, /* create */
- { &vop_mknod_desc, spec_mknod }, /* mknod */
- { &vop_open_desc, spec_open }, /* open */
- { &vop_close_desc, ufsspec_close }, /* close */
- { &vop_access_desc, ext2fs_access }, /* access */
- { &vop_getattr_desc, ext2fs_getattr }, /* getattr */
- { &vop_setattr_desc, ext2fs_setattr }, /* setattr */
- { &vop_read_desc, ufsspec_read }, /* read */
- { &vop_write_desc, ufsspec_write }, /* write */
- { &vop_ioctl_desc, spec_ioctl }, /* ioctl */
- { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
- { &vop_poll_desc, spec_poll }, /* poll */
- { &vop_kqfilter_desc, spec_kqfilter }, /* kqfilter */
- { &vop_revoke_desc, spec_revoke }, /* revoke */
- { &vop_mmap_desc, spec_mmap }, /* mmap */
- { &vop_fsync_desc, ext2fs_fsync }, /* fsync */
- { &vop_seek_desc, spec_seek }, /* seek */
- { &vop_remove_desc, spec_remove }, /* remove */
- { &vop_link_desc, spec_link }, /* link */
- { &vop_rename_desc, spec_rename }, /* rename */
- { &vop_mkdir_desc, spec_mkdir }, /* mkdir */
- { &vop_rmdir_desc, spec_rmdir }, /* rmdir */
- { &vop_symlink_desc, spec_symlink }, /* symlink */
- { &vop_readdir_desc, spec_readdir }, /* readdir */
- { &vop_readlink_desc, spec_readlink }, /* readlink */
- { &vop_abortop_desc, spec_abortop }, /* abortop */
- { &vop_inactive_desc, ext2fs_inactive }, /* inactive */
- { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */
- { &vop_lock_desc, ufs_lock }, /* lock */
- { &vop_unlock_desc, ufs_unlock }, /* unlock */
- { &vop_bmap_desc, spec_bmap }, /* bmap */
- { &vop_strategy_desc, spec_strategy }, /* strategy */
- { &vop_print_desc, ufs_print }, /* print */
- { &vop_islocked_desc, ufs_islocked }, /* islocked */
- { &vop_pathconf_desc, spec_pathconf }, /* pathconf */
- { &vop_advlock_desc, spec_advlock }, /* advlock */
- { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
- { &vop_getpages_desc, spec_getpages }, /* getpages */
- { &vop_putpages_desc, spec_putpages }, /* putpages */
- { NULL, NULL }
- };
- const struct vnodeopv_desc ext2fs_specop_opv_desc =
- { &ext2fs_specop_p, ext2fs_specop_entries };
- int (**ext2fs_fifoop_p)(void *);
- const struct vnodeopv_entry_desc ext2fs_fifoop_entries[] = {
- { &vop_default_desc, vn_default_error },
- { &vop_lookup_desc, vn_fifo_bypass }, /* lookup */
- { &vop_create_desc, vn_fifo_bypass }, /* create */
- { &vop_mknod_desc, vn_fifo_bypass }, /* mknod */
- { &vop_open_desc, vn_fifo_bypass }, /* open */
- { &vop_close_desc, ufsfifo_close }, /* close */
- { &vop_access_desc, ext2fs_access }, /* access */
- { &vop_getattr_desc, ext2fs_getattr }, /* getattr */
- { &vop_setattr_desc, ext2fs_setattr }, /* setattr */
- { &vop_read_desc, ufsfifo_read }, /* read */
- { &vop_write_desc, ufsfifo_write }, /* write */
- { &vop_ioctl_desc, vn_fifo_bypass }, /* ioctl */
- { &vop_fcntl_desc, ufs_fcntl }, /* fcntl */
- { &vop_poll_desc, vn_fifo_bypass }, /* poll */
- { &vop_kqfilter_desc, vn_fifo_bypass }, /* kqfilter */
- { &vop_revoke_desc, vn_fifo_bypass }, /* revoke */
- { &vop_mmap_desc, vn_fifo_bypass }, /* mmap */
- { &vop_fsync_desc, ext2fs_fsync }, /* fsync */
- { &vop_seek_desc, vn_fifo_bypass }, /* seek */
- { &vop_remove_desc, vn_fifo_bypass }, /* remove */
- { &vop_link_desc, vn_fifo_bypass }, /* link */
- { &vop_rename_desc, vn_fifo_bypass }, /* rename */
- { &vop_mkdir_desc, vn_fifo_bypass }, /* mkdir */
- { &vop_rmdir_desc, vn_fifo_bypass }, /* rmdir */
- { &vop_symlink_desc, vn_fifo_bypass }, /* symlink */
- { &vop_readdir_desc, vn_fifo_bypass }, /* readdir */
- { &vop_readlink_desc, vn_fifo_bypass }, /* readlink */
- { &vop_abortop_desc, vn_fifo_bypass }, /* abortop */
- { &vop_inactive_desc, ext2fs_inactive }, /* inactive */
- { &vop_reclaim_desc, ext2fs_reclaim }, /* reclaim */
- { &vop_lock_desc, ufs_lock }, /* lock */
- { &vop_unlock_desc, ufs_unlock }, /* unlock */
- { &vop_bmap_desc, vn_fifo_bypass }, /* bmap */
- { &vop_strategy_desc, vn_fifo_bypass }, /* strategy */
- { &vop_print_desc, ufs_print }, /* print */
- { &vop_islocked_desc, ufs_islocked }, /* islocked */
- { &vop_pathconf_desc, vn_fifo_bypass }, /* pathconf */
- { &vop_advlock_desc, vn_fifo_bypass }, /* advlock */
- { &vop_bwrite_desc, vn_bwrite }, /* bwrite */
- { &vop_putpages_desc, vn_fifo_bypass }, /* putpages */
- { NULL, NULL }
- };
- const struct vnodeopv_desc ext2fs_fifoop_opv_desc =
- { &ext2fs_fifoop_p, ext2fs_fifoop_entries };