/* $NetBSD: ufs_vnops.c,v 1.42 1998/06/22 22:01:11 sommerfe Exp $ */ /* * Copyright (c) 1982, 1986, 1989, 1993, 1995 * 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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 8.28 (Berkeley) 7/31/95 */ #include "opt_quota.h" #include "opt_uvm.h" #include "opt_fifo.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if defined(UVM) #include #endif #include #include #include #include #include #include #include #include #include static int ufs_chmod __P((struct vnode *, int, struct ucred *, struct proc *)); static int ufs_chown __P((struct vnode *, uid_t, gid_t, struct ucred *, struct proc *)); 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 ufs_create(v) void *v; { struct vop_create_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; return ufs_makeinode(MAKEIMODE(ap->a_vap->va_type, ap->a_vap->va_mode), ap->a_dvp, ap->a_vpp, ap->a_cnp); } /* * Mknod vnode call */ /* ARGSUSED */ int ufs_mknod(v) 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; if ((error = ufs_makeinode(MAKEIMODE(vap->va_type, vap->va_mode), ap->a_dvp, vpp, ap->a_cnp)) != 0) return (error); ip = VTOI(*vpp); 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_ffs_rdev = ufs_rw32(vap->va_rdev, UFS_MPNEEDSWAP((*vpp)->v_mount)); } /* * 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. */ vput(*vpp); (*vpp)->v_type = VNON; vgone(*vpp); *vpp = 0; return (0); } /* * Open called. * * Nothing to do. */ /* ARGSUSED */ int ufs_open(v) void *v; { struct vop_open_args /* { struct vnode *a_vp; int a_mode; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; /* * Files marked append-only must be opened for appending. */ if ((VTOI(ap->a_vp)->i_ffs_flags & APPEND) && (ap->a_mode & (FWRITE | O_APPEND)) == FWRITE) return (EPERM); return (0); } /* * Close called. * * Update the times on the inode. */ /* ARGSUSED */ int ufs_close(v) void *v; { struct vop_close_args /* { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct inode *ip = VTOI(vp); struct timespec ts; simple_lock(&vp->v_interlock); if (vp->v_usecount > 1) { TIMEVAL_TO_TIMESPEC(&time, &ts); ITIMES(ip, &ts, &ts, &ts); } simple_unlock(&vp->v_interlock); return (0); } int ufs_access(v) void *v; { struct vop_access_args /* { struct vnode *a_vp; int a_mode; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct inode *ip = VTOI(vp); mode_t mode = ap->a_mode; #ifdef QUOTA int error = 0; #endif /* * 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); #ifdef QUOTA if ((error = getinoquota(ip)) != 0) return (error); #endif break; case VBAD: case VBLK: case VCHR: case VSOCK: case VFIFO: case VNON: default: break; } } /* If immutable bit set, nobody gets to write it. */ if ((mode & VWRITE) && (ip->i_ffs_flags & IMMUTABLE)) return (EPERM); return (vaccess(vp->v_type, ip->i_ffs_mode & ALLPERMS, ip->i_ffs_uid, ip->i_ffs_gid, mode, ap->a_cred)); } /* ARGSUSED */ int ufs_getattr(v) void *v; { struct vop_getattr_args /* { struct vnode *a_vp; struct vattr *a_vap; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct inode *ip = VTOI(vp); register struct vattr *vap = ap->a_vap; struct timespec ts; TIMEVAL_TO_TIMESPEC(&time, &ts); FFS_ITIMES(ip, &ts, &ts, &ts); /* * Copy from inode table */ vap->va_fsid = ip->i_dev; vap->va_fileid = ip->i_number; vap->va_mode = ip->i_ffs_mode & ALLPERMS; vap->va_nlink = ip->i_ffs_nlink; vap->va_uid = ip->i_ffs_uid; vap->va_gid = ip->i_ffs_gid; vap->va_rdev = ufs_rw32((dev_t)ip->i_ffs_rdev, UFS_MPNEEDSWAP(vp->v_mount)); vap->va_size = ip->i_ffs_size; vap->va_atime.tv_sec = ip->i_ffs_atime; vap->va_atime.tv_nsec = ip->i_ffs_atimensec; vap->va_mtime.tv_sec = ip->i_ffs_mtime; vap->va_mtime.tv_nsec = ip->i_ffs_mtimensec; vap->va_ctime.tv_sec = ip->i_ffs_ctime; vap->va_ctime.tv_nsec = ip->i_ffs_ctimensec; vap->va_flags = ip->i_ffs_flags; vap->va_gen = ip->i_ffs_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_int64_t)ip->i_ffs_blocks); vap->va_type = vp->v_type; vap->va_filerev = ip->i_modrev; return (0); } /* * Set attribute vnode op. called from several syscalls */ int ufs_setattr(v) void *v; { struct vop_setattr_args /* { struct vnode *a_vp; struct vattr *a_vap; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; struct vattr *vap = ap->a_vap; struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct ucred *cred = ap->a_cred; struct proc *p = ap->a_p; int error; /* * Check for unsettable attributes. */ if ((vap->va_type != VNON) || (vap->va_nlink != 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 (cred->cr_uid != ip->i_ffs_uid && (error = suser(cred, &p->p_acflag))) return (error); if (cred->cr_uid == 0) { if ((ip->i_ffs_flags & (SF_IMMUTABLE | SF_APPEND)) && securelevel > 0) return (EPERM); ip->i_ffs_flags = vap->va_flags; } else { if ((ip->i_ffs_flags & (SF_IMMUTABLE | SF_APPEND)) || (vap->va_flags & UF_SETTABLE) != vap->va_flags) return (EPERM); if ((ip->i_ffs_flags & SF_SETTABLE) != (vap->va_flags & SF_SETTABLE)) return (EPERM); ip->i_ffs_flags &= SF_SETTABLE; ip->i_ffs_flags |= (vap->va_flags & UF_SETTABLE); } ip->i_flag |= IN_CHANGE; if (vap->va_flags & (IMMUTABLE | APPEND)) return (0); } if (ip->i_ffs_flags & (IMMUTABLE | APPEND)) 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 = ufs_chown(vp, vap->va_uid, vap->va_gid, cred, p); 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); break; default: break; } error = VOP_TRUNCATE(vp, vap->va_size, 0, cred, p); 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); if (cred->cr_uid != ip->i_ffs_uid && (error = suser(cred, &p->p_acflag)) && ((vap->va_vaflags & VA_UTIMES_NULL) == 0 || (error = VOP_ACCESS(vp, VWRITE, cred, p)))) 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; error = VOP_UPDATE(vp, &vap->va_atime, &vap->va_mtime, 1); if (error) return (error); } error = 0; if (vap->va_mode != (mode_t)VNOVAL) { if (vp->v_mount->mnt_flag & MNT_RDONLY) return (EROFS); error = ufs_chmod(vp, (int)vap->va_mode, cred, p); } return (error); } /* * Change the mode on a file. * Inode must be locked before calling. */ static int ufs_chmod(vp, mode, cred, p) register struct vnode *vp; register int mode; register struct ucred *cred; struct proc *p; { register struct inode *ip = VTOI(vp); int error; if (cred->cr_uid != ip->i_ffs_uid && (error = suser(cred, &p->p_acflag))) return (error); if (cred->cr_uid) { if (vp->v_type != VDIR && (mode & S_ISTXT)) return (EFTYPE); if (!groupmember(ip->i_ffs_gid, cred) && (mode & ISGID)) return (EPERM); } ip->i_ffs_mode &= ~ALLPERMS; ip->i_ffs_mode |= (mode & ALLPERMS); ip->i_flag |= IN_CHANGE; if ((vp->v_flag & VTEXT) && (ip->i_ffs_mode & S_ISTXT) == 0) #if defined(UVM) (void) uvm_vnp_uncache(vp); #else (void) vnode_pager_uncache(vp); #endif return (0); } /* * Perform chown operation on inode ip; * inode must be locked prior to call. */ static int ufs_chown(vp, uid, gid, cred, p) register struct vnode *vp; uid_t uid; gid_t gid; struct ucred *cred; struct proc *p; { register struct inode *ip = VTOI(vp); int error = 0; #ifdef QUOTA uid_t ouid; gid_t ogid; register int i; long change; #endif if (uid == (uid_t)VNOVAL) uid = ip->i_ffs_uid; if (gid == (gid_t)VNOVAL) gid = ip->i_ffs_gid; /* * If we don't own the file, are trying to change the owner * of the file, or are not a member of the target group, * the caller's credentials must imply super-user privilege * or the call fails. */ if ((cred->cr_uid != ip->i_ffs_uid || uid != ip->i_ffs_uid || (gid != ip->i_ffs_gid && !groupmember((gid_t)gid, cred))) && ((error = suser(cred, &p->p_acflag)) != 0)) return (error); #ifdef QUOTA ogid = ip->i_ffs_gid; ouid = ip->i_ffs_uid; if ((error = getinoquota(ip)) != 0) return (error); if (ouid == uid) { dqrele(vp, ip->i_dquot[USRQUOTA]); ip->i_dquot[USRQUOTA] = NODQUOT; } if (ogid == gid) { dqrele(vp, ip->i_dquot[GRPQUOTA]); ip->i_dquot[GRPQUOTA] = NODQUOT; } change = ip->i_ffs_blocks; (void) chkdq(ip, -change, cred, CHOWN); (void) chkiq(ip, -1, cred, CHOWN); for (i = 0; i < MAXQUOTAS; i++) { dqrele(vp, ip->i_dquot[i]); ip->i_dquot[i] = NODQUOT; } #endif ip->i_ffs_gid = gid; ip->i_ffs_uid = uid; #ifdef QUOTA if ((error = getinoquota(ip)) == 0) { if (ouid == uid) { dqrele(vp, ip->i_dquot[USRQUOTA]); ip->i_dquot[USRQUOTA] = NODQUOT; } if (ogid == gid) { dqrele(vp, ip->i_dquot[GRPQUOTA]); ip->i_dquot[GRPQUOTA] = NODQUOT; } if ((error = chkdq(ip, change, cred, CHOWN)) == 0) { if ((error = chkiq(ip, 1, cred, CHOWN)) == 0) goto good; else (void) chkdq(ip, -change, cred, CHOWN|FORCE); } for (i = 0; i < MAXQUOTAS; i++) { dqrele(vp, ip->i_dquot[i]); ip->i_dquot[i] = NODQUOT; } } ip->i_ffs_gid = ogid; ip->i_ffs_uid = ouid; if (getinoquota(ip) == 0) { if (ouid == uid) { dqrele(vp, ip->i_dquot[USRQUOTA]); ip->i_dquot[USRQUOTA] = NODQUOT; } if (ogid == gid) { dqrele(vp, ip->i_dquot[GRPQUOTA]); ip->i_dquot[GRPQUOTA] = NODQUOT; } (void) chkdq(ip, change, cred, FORCE|CHOWN); (void) chkiq(ip, 1, cred, FORCE|CHOWN); (void) getinoquota(ip); } return (error); good: if (getinoquota(ip)) panic("chown: lost quota"); #endif /* QUOTA */ ip->i_flag |= IN_CHANGE; return (0); } /* ARGSUSED */ int ufs_ioctl(v) void *v; { #if 0 struct vop_ioctl_args /* { struct vnode *a_vp; u_long a_command; caddr_t a_data; int a_fflag; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; #endif return (ENOTTY); } /* * Mmap a file * * NB Currently unsupported. */ /* ARGSUSED */ int ufs_mmap(v) void *v; { #if 0 struct vop_mmap_args /* { struct vnode *a_vp; int a_fflags; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; #endif return (EINVAL); } int ufs_remove(v) 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; int error; ip = VTOI(vp); if (vp->v_type == VDIR || (ip->i_ffs_flags & (IMMUTABLE | APPEND)) || (VTOI(dvp)->i_ffs_flags & APPEND)) { error = EPERM; goto out; } error = ufs_dirremove(dvp, ap->a_cnp); if (error == 0) { ip->i_ffs_nlink--; ip->i_flag |= IN_CHANGE; } out: if (dvp == vp) vrele(vp); else vput(vp); vput(dvp); return (error); } /* * link vnode call */ int ufs_link(v) 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; struct timespec ts; int error; #ifdef DIAGNOSTIC if ((cnp->cn_flags & HASBUF) == 0) panic("ufs_link: no name"); #endif if (vp->v_type == VDIR) { VOP_ABORTOP(dvp, cnp); error = EPERM; goto out2; } if (dvp->v_mount != vp->v_mount) { VOP_ABORTOP(dvp, cnp); error = EXDEV; goto out2; } if (dvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE))) { VOP_ABORTOP(dvp, cnp); goto out2; } ip = VTOI(vp); if ((nlink_t)ip->i_ffs_nlink >= LINK_MAX) { VOP_ABORTOP(dvp, cnp); error = EMLINK; goto out1; } if (ip->i_ffs_flags & (IMMUTABLE | APPEND)) { VOP_ABORTOP(dvp, cnp); error = EPERM; goto out1; } ip->i_ffs_nlink++; ip->i_flag |= IN_CHANGE; TIMEVAL_TO_TIMESPEC(&time, &ts); error = VOP_UPDATE(vp, &ts, &ts, 1); if (!error) error = ufs_direnter(ip, dvp, cnp); if (error) { ip->i_ffs_nlink--; ip->i_flag |= IN_CHANGE; } FREE(cnp->cn_pnbuf, M_NAMEI); out1: if (dvp != vp) VOP_UNLOCK(vp, 0); out2: vput(dvp); return (error); } /* * whiteout vnode call */ int ufs_whiteout(v) void *v; { struct vop_whiteout_args /* { struct vnode *a_dvp; struct componentname *a_cnp; int a_flags; } */ *ap = v; struct vnode *dvp = ap->a_dvp; struct componentname *cnp = ap->a_cnp; struct direct newdir; int error = 0; switch (ap->a_flags) { case LOOKUP: /* 4.4 format directories support whiteout operations */ if (dvp->v_mount->mnt_maxsymlinklen > 0) return (0); return (EOPNOTSUPP); case CREATE: /* create a new directory whiteout */ #ifdef DIAGNOSTIC if ((cnp->cn_flags & SAVENAME) == 0) panic("ufs_whiteout: missing name"); if (dvp->v_mount->mnt_maxsymlinklen <= 0) panic("ufs_whiteout: old format filesystem"); #endif newdir.d_ino = WINO; newdir.d_namlen = cnp->cn_namelen; bcopy(cnp->cn_nameptr, newdir.d_name, (unsigned)cnp->cn_namelen + 1); newdir.d_type = DT_WHT; /* byte order swapping handled by ufs_direnter2 */ error = ufs_direnter2(dvp, &newdir, cnp->cn_cred, cnp->cn_proc); break; case DELETE: /* remove an existing directory whiteout */ #ifdef DIAGNOSTIC if (dvp->v_mount->mnt_maxsymlinklen <= 0) panic("ufs_whiteout: old format filesystem"); #endif cnp->cn_flags &= ~DOWHITEOUT; error = ufs_dirremove(dvp, cnp); break; } if (cnp->cn_flags & HASBUF) { FREE(cnp->cn_pnbuf, M_NAMEI); cnp->cn_flags &= ~HASBUF; } 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 ufs_rename(v) 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; register 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 dirtemplate dirbuf; struct timespec ts; int doingdirectory = 0, oldparent = 0, newparent = 0; int error = 0; u_char namlen; #ifdef DIAGNOSTIC if ((tcnp->cn_flags & HASBUF) == 0 || (fcnp->cn_flags & HASBUF) == 0) panic("ufs_rename: no name"); #endif /* * 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_ffs_flags & (IMMUTABLE | APPEND)) || (VTOI(tdvp)->i_ffs_flags & 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(fdvp); vrele(fvp); fcnp->cn_flags &= ~MODMASK; fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; if ((fcnp->cn_flags & SAVESTART) == 0) panic("ufs_rename: lost from startdir"); fcnp->cn_nameiop = DELETE; (void) relookup(fdvp, &fvp, fcnp); return (VOP_REMOVE(fdvp, fvp, fcnp)); } if ((error = vn_lock(fvp, LK_EXCLUSIVE)) != 0) goto abortit; dp = VTOI(fdvp); ip = VTOI(fvp); if ((ip->i_ffs_flags & (IMMUTABLE | APPEND)) || (dp->i_ffs_flags & APPEND)) { VOP_UNLOCK(fvp, 0); error = EPERM; goto abortit; } if ((ip->i_ffs_mode & IFMT) == IFDIR) { /* * 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, 0); error = EINVAL; goto abortit; } ip->i_flag |= IN_RENAME; oldparent = dp->i_number; doingdirectory++; } vrele(fdvp); /* * 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_ffs_nlink++; ip->i_flag |= IN_CHANGE; TIMEVAL_TO_TIMESPEC(&time, &ts); if ((error = VOP_UPDATE(fvp, &ts, &ts, 1)) != 0) { VOP_UNLOCK(fvp, 0); goto bad; } /* * If ".." must be changed (ie the directory gets a new * parent) then the source directory must not be in the * directory heirarchy 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, tcnp->cn_proc); VOP_UNLOCK(fvp, 0); 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); if ((error = ufs_checkpath(ip, dp, tcnp->cn_cred)) != 0) goto out; if ((tcnp->cn_flags & SAVESTART) == 0) panic("ufs_rename: lost to startdir"); if ((error = relookup(tdvp, &tvp, tcnp)) != 0) 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_ffs_nlink >= LINK_MAX) { error = EMLINK; goto bad; } dp->i_ffs_nlink++; dp->i_flag |= IN_CHANGE; if ((error = VOP_UPDATE(tdvp, &ts, &ts, 1)) != 0) goto bad; } if ((error = ufs_direnter(ip, tdvp, tcnp)) != 0) { if (doingdirectory && newparent) { dp->i_ffs_nlink--; dp->i_flag |= IN_CHANGE; (void)VOP_UPDATE(tdvp, &ts, &ts, 1); } goto bad; } 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_ffs_mode & S_ISTXT) && tcnp->cn_cred->cr_uid != 0 && tcnp->cn_cred->cr_uid != dp->i_ffs_uid && xp->i_ffs_uid != tcnp->cn_cred->cr_uid) { 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_ffs_mode & IFMT) == IFDIR) { if (!ufs_dirempty(xp, dp->i_number, tcnp->cn_cred) || xp->i_ffs_nlink > 2) { error = ENOTEMPTY; goto bad; } if (!doingdirectory) { error = ENOTDIR; goto bad; } cache_purge(tdvp); } else if (doingdirectory) { error = EISDIR; goto bad; } if ((error = ufs_dirrewrite(dp, ip, tcnp)) != 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_ffs_nlink--; dp->i_flag |= IN_CHANGE; } vput(tdvp); /* * 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_ffs_nlink--; if (doingdirectory) { if (--xp->i_ffs_nlink != 0) panic("rename: linked directory"); error = VOP_TRUNCATE(tvp, (off_t)0, IO_SYNC, tcnp->cn_cred, tcnp->cn_proc); } xp->i_flag |= IN_CHANGE; vput(tvp); xp = NULL; } /* * 3) Unlink the source. */ fcnp->cn_flags &= ~MODMASK; fcnp->cn_flags |= LOCKPARENT | LOCKLEAF; if ((fcnp->cn_flags & SAVESTART) == 0) panic("ufs_rename: lost from startdir"); (void) relookup(fdvp, &fvp, fcnp); if (fvp != NULL) { xp = VTOI(fvp); dp = VTOI(fdvp); } else { /* * From name has disappeared. */ if (doingdirectory) panic("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("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) { dp->i_ffs_nlink--; dp->i_flag |= IN_CHANGE; error = vn_rdwr(UIO_READ, fvp, (caddr_t)&dirbuf, sizeof (struct dirtemplate), (off_t)0, UIO_SYSSPACE, IO_NODELOCKED, tcnp->cn_cred, (int *)0, (struct proc *)0); if (error == 0) { #if (BYTE_ORDER == LITTLE_ENDIAN) if (fvp->v_mount->mnt_maxsymlinklen <= 0 && UFS_MPNEEDSWAP(fvp->v_mount) == 0) namlen = dirbuf.dotdot_type; else namlen = dirbuf.dotdot_namlen; #else if (fvp->v_mount->mnt_maxsymlinklen <= 0 && UFS_MPNEEDSWAP(fvp->v_mount) != 0) namlen = dirbuf.dotdot_type; else namlen = dirbuf.dotdot_namlen; #endif if (namlen != 2 || dirbuf.dotdot_name[0] != '.' || dirbuf.dotdot_name[1] != '.') { ufs_dirbad(xp, (doff_t)12, "rename: mangled dir"); } else { dirbuf.dotdot_ino = ufs_rw32(newparent, UFS_MPNEEDSWAP(fvp->v_mount)); (void) vn_rdwr(UIO_WRITE, fvp, (caddr_t)&dirbuf, sizeof (struct dirtemplate), (off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_SYNC, tcnp->cn_cred, (int *)0, (struct proc *)0); cache_purge(fdvp); } } } error = ufs_dirremove(fdvp, fcnp); if (!error) { xp->i_ffs_nlink--; xp->i_flag |= IN_CHANGE; } xp->i_flag &= ~IN_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_ffs_nlink--; ip->i_flag |= IN_CHANGE; vput(fvp); } else vrele(fvp); return (error); } /* * A virgin directory (no blushing please). */ static struct dirtemplate mastertemplate = { 0, 12, DT_DIR, 1, ".", 0, DIRBLKSIZ - 12, DT_DIR, 2, ".." }; /* * Mkdir system call */ int ufs_mkdir(v) void *v; { struct vop_mkdir_args /* { struct vnode *a_dvp; struct vnode **a_vpp; struct componentname *a_cnp; struct vattr *a_vap; } */ *ap = v; register struct vnode *dvp = ap->a_dvp; register struct vattr *vap = ap->a_vap; register struct componentname *cnp = ap->a_cnp; register struct inode *ip, *dp; struct vnode *tvp; struct dirtemplate dirtemplate; struct timespec ts; int error, dmode; #ifdef DIAGNOSTIC if ((cnp->cn_flags & HASBUF) == 0) panic("ufs_mkdir: no name"); #endif dp = VTOI(dvp); if ((nlink_t)dp->i_ffs_nlink >= LINK_MAX) { error = EMLINK; goto out; } dmode = vap->va_mode & ACCESSPERMS; dmode |= IFDIR; /* * Must simulate part of ufs_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 = VOP_VALLOC(dvp, dmode, cnp->cn_cred, &tvp)) != 0) goto out; ip = VTOI(tvp); ip->i_ffs_uid = cnp->cn_cred->cr_uid; ip->i_ffs_gid = dp->i_ffs_gid; #ifdef QUOTA if ((error = getinoquota(ip)) || (error = chkiq(ip, 1, cnp->cn_cred, 0))) { free(cnp->cn_pnbuf, M_NAMEI); VOP_VFREE(tvp, ip->i_number, dmode); vput(tvp); vput(dvp); return (error); } #endif ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; ip->i_ffs_mode = dmode; tvp->v_type = VDIR; /* Rest init'd in getnewvnode(). */ ip->i_ffs_nlink = 2; if (cnp->cn_flags & ISWHITEOUT) ip->i_ffs_flags |= UF_OPAQUE; TIMEVAL_TO_TIMESPEC(&time, &ts); error = VOP_UPDATE(tvp, &ts, &ts, 1); /* * 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_ffs_nlink++; dp->i_flag |= IN_CHANGE; if ((error = VOP_UPDATE(dvp, &ts, &ts, 1)) != 0) goto bad; /* Initialize directory with "." and ".." from static template. */ dirtemplate = mastertemplate; dirtemplate.dot_ino = ufs_rw32(ip->i_number, UFS_MPNEEDSWAP(dvp->v_mount)); dirtemplate.dotdot_ino = ufs_rw32(dp->i_number, UFS_MPNEEDSWAP(dvp->v_mount)); dirtemplate.dot_reclen = ufs_rw16(dirtemplate.dot_reclen, UFS_MPNEEDSWAP(dvp->v_mount)); dirtemplate.dotdot_reclen = ufs_rw16(dirtemplate.dotdot_reclen, UFS_MPNEEDSWAP(dvp->v_mount)); if (dvp->v_mount->mnt_maxsymlinklen == 0) { #if BYTE_ORDER == LITTLE_ENDIAN if (UFS_MPNEEDSWAP(dvp->v_mount) == 0) { #else if (UFS_MPNEEDSWAP(dvp->v_mount) != 0) { #endif dirtemplate.dot_type = dirtemplate.dot_namlen; dirtemplate.dotdot_type = dirtemplate.dotdot_namlen; dirtemplate.dot_namlen = dirtemplate.dotdot_namlen = 0; } else dirtemplate.dot_type = dirtemplate.dotdot_type = 0; } error = vn_rdwr(UIO_WRITE, tvp, (caddr_t)&dirtemplate, sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE, IO_NODELOCKED|IO_SYNC, cnp->cn_cred, (int *)0, (struct proc *)0); if (error) { dp->i_ffs_nlink--; dp->i_flag |= IN_CHANGE; goto bad; } if (DIRBLKSIZ > VFSTOUFS(dvp->v_mount)->um_mountp->mnt_stat.f_bsize) panic("ufs_mkdir: blksize"); /* XXX should grow with balloc() */ else { ip->i_ffs_size = DIRBLKSIZ; ip->i_flag |= IN_CHANGE; } /* Directory set up, now install it's entry in the parent directory. */ if ((error = ufs_direnter(ip, dvp, cnp)) != 0) { dp->i_ffs_nlink--; dp->i_flag |= IN_CHANGE; } bad: /* * No need to do an explicit VOP_TRUNCATE here, vrele will do this * for us because we set the link count to 0. */ if (error) { ip->i_ffs_nlink = 0; ip->i_flag |= IN_CHANGE; vput(tvp); } else *ap->a_vpp = tvp; out: FREE(cnp->cn_pnbuf, M_NAMEI); vput(dvp); return (error); } /* * Rmdir system call. */ int ufs_rmdir(v) 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; ip = VTOI(vp); dp = VTOI(dvp); /* * 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_ffs_nlink != 2 || !ufs_dirempty(ip, dp->i_number, cnp->cn_cred)) { error = ENOTEMPTY; goto out; } if ((dp->i_ffs_flags & APPEND) || (ip->i_ffs_flags & (IMMUTABLE | 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, */ if ((error = ufs_dirremove(dvp, cnp)) != 0) goto out; dp->i_ffs_nlink--; dp->i_flag |= IN_CHANGE; 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_ffs_nlink -= 2; error = VOP_TRUNCATE(vp, (off_t)0, IO_SYNC, cnp->cn_cred, cnp->cn_proc); cache_purge(ITOV(ip)); out: if (dvp) vput(dvp); vput(vp); return (error); } /* * symlink -- make a symbolic link */ int ufs_symlink(v) 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; register struct vnode *vp, **vpp = ap->a_vpp; register struct inode *ip; int len, error; error = ufs_makeinode(IFLNK | ap->a_vap->va_mode, ap->a_dvp, vpp, ap->a_cnp); if (error) return (error); vp = *vpp; len = strlen(ap->a_target); if (len < vp->v_mount->mnt_maxsymlinklen) { ip = VTOI(vp); bcopy(ap->a_target, (char *)ip->i_ffs_shortlink, len); ip->i_ffs_size = len; ip->i_flag |= IN_CHANGE | IN_UPDATE; } else error = vn_rdwr(UIO_WRITE, vp, ap->a_target, len, (off_t)0, UIO_SYSSPACE, IO_NODELOCKED, ap->a_cnp->cn_cred, (int *)0, (struct proc *)0); vput(vp); return (error); } /* * Vnode op for reading directories. * * The routine below assumes that the on-disk format of a directory * is the same as that defined by . If the on-disk * format changes, then it will be necessary to do a conversion * from the on-disk format that read returns to the format defined * by . */ int ufs_readdir(v) void *v; { struct vop_readdir_args /* { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; int *a_eofflag; off_t **a_cookies; int *ncookies; } */ *ap = v; register struct uio *uio = ap->a_uio; int error; size_t count, lost; off_t off = uio->uio_offset; if (ap->a_vp->v_type != VDIR) return (ENOTDIR); count = uio->uio_resid; /* Make sure we don't return partial entries. */ count -= (uio->uio_offset + count) & (DIRBLKSIZ -1); if (count <= 0) return (EINVAL); lost = uio->uio_resid - count; uio->uio_resid = count; uio->uio_iov->iov_len = count; #if BYTE_ORDER == LITTLE_ENDIAN if (ap->a_vp->v_mount->mnt_maxsymlinklen > 0 && UFS_MPNEEDSWAP(ap->a_vp->v_mount) == 0) { #else if (UFS_MPNEEDSWAP(ap->a_vp->v_mount) == 0) { #endif error = VOP_READ(ap->a_vp, uio, 0, ap->a_cred); } else { struct dirent *dp, *edp; struct uio auio; struct iovec aiov; caddr_t dirbuf; int readcnt; u_char tmp; auio = *uio; auio.uio_iov = &aiov; auio.uio_iovcnt = 1; auio.uio_segflg = UIO_SYSSPACE; aiov.iov_len = count; MALLOC(dirbuf, caddr_t, count, M_TEMP, M_WAITOK); aiov.iov_base = dirbuf; error = VOP_READ(ap->a_vp, &auio, 0, ap->a_cred); if (error == 0) { readcnt = count - auio.uio_resid; edp = (struct dirent *)&dirbuf[readcnt]; for (dp = (struct dirent *)dirbuf; dp < edp; ) { #if BYTE_ORDER == LITTLE_ENDIAN if (ap->a_vp->v_mount->mnt_maxsymlinklen == 0 && UFS_MPNEEDSWAP(ap->a_vp->v_mount) == 0) { #else if (ap->a_vp->v_mount->mnt_maxsymlinklen == 0 && UFS_MPNEEDSWAP(ap->a_vp->v_mount) != 0) { #endif tmp = dp->d_namlen; dp->d_namlen = dp->d_type; dp->d_type = tmp; } dp->d_fileno = ufs_rw32(dp->d_fileno, UFS_MPNEEDSWAP(ap->a_vp->v_mount)); dp->d_reclen = ufs_rw16(dp->d_reclen, UFS_MPNEEDSWAP(ap->a_vp->v_mount)); if (dp->d_reclen > 0) { dp = (struct dirent *) ((char *)dp + dp->d_reclen); } else { error = EIO; break; } } if (dp >= edp) error = uiomove(dirbuf, readcnt, uio); } FREE(dirbuf, M_TEMP); } if (!error && ap->a_ncookies) { struct dirent *dp, *dpstart; off_t *cookies, offstart; int ncookies; /* * Only the NFS server and emulations use cookies, and they * load the directory block into system space, so we can * just look at it directly. */ if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) panic("ufs_readdir: lost in space"); dpstart = (struct dirent *) ((caddr_t)uio->uio_iov->iov_base - (uio->uio_offset - off)); offstart = off; for (dp = dpstart, ncookies = 0; off < uio->uio_offset; ) { if (dp->d_reclen == 0) break; off += dp->d_reclen; ncookies++; dp = (struct dirent *)((caddr_t)dp + dp->d_reclen); } lost += uio->uio_offset - off; MALLOC(cookies, off_t *, ncookies * sizeof(off_t), M_TEMP, M_WAITOK); uio->uio_offset = off; *ap->a_ncookies = ncookies; *ap->a_cookies = cookies; for (off = offstart, dp = dpstart; off < uio->uio_offset; ) { off += dp->d_reclen; *(cookies++) = off; dp = (struct dirent *)((caddr_t)dp + dp->d_reclen); } } uio->uio_resid += lost; *ap->a_eofflag = VTOI(ap->a_vp)->i_ffs_size <= uio->uio_offset; return (error); } /* * Return target name of a symbolic link */ int ufs_readlink(v) void *v; { struct vop_readlink_args /* { struct vnode *a_vp; struct uio *a_uio; struct ucred *a_cred; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct inode *ip = VTOI(vp); int isize; isize = ip->i_ffs_size; if (isize < vp->v_mount->mnt_maxsymlinklen || (vp->v_mount->mnt_maxsymlinklen == 0 && ip->i_ffs_blocks == 0)) { uiomove((char *)ip->i_ffs_shortlink, isize, ap->a_uio); return (0); } return (VOP_READ(vp, ap->a_uio, 0, ap->a_cred)); } /* * Lock an inode. If its already locked, set the WANT bit and sleep. */ int ufs_lock(v) void *v; { struct vop_lock_args /* { struct vnode *a_vp; int a_flags; struct proc *a_p; } */ *ap = v; struct vnode *vp = ap->a_vp; return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags, &vp->v_interlock)); } /* * Unlock an inode. If WANT bit is on, wakeup. */ int ufs_unlock(v) void *v; { struct vop_unlock_args /* { struct vnode *a_vp; int a_flags; struct proc *a_p; } */ *ap = v; register struct vnode *vp = ap->a_vp; return (lockmgr(&VTOI(vp)->i_lock, ap->a_flags | LK_RELEASE, &vp->v_interlock)); } /* * Check for a locked inode. */ int ufs_islocked(v) void *v; { struct vop_islocked_args /* { struct vnode *a_vp; } */ *ap = v; return (lockstatus(&VTOI(ap->a_vp)->i_lock)); } /* * Calculate the logical to physical mapping if not done already, * then call the device strategy routine. */ int ufs_strategy(v) void *v; { struct vop_strategy_args /* { struct buf *a_bp; } */ *ap = v; register struct buf *bp = ap->a_bp; register struct vnode *vp = bp->b_vp; register struct inode *ip; int error; ip = VTOI(vp); if (vp->v_type == VBLK || vp->v_type == VCHR) panic("ufs_strategy: spec"); if (bp->b_blkno == bp->b_lblkno) { error = VOP_BMAP(vp, bp->b_lblkno, NULL, &bp->b_blkno, NULL); if (error) { bp->b_error = error; bp->b_flags |= B_ERROR; biodone(bp); return (error); } if ((long)bp->b_blkno == -1) clrbuf(bp); } if ((long)bp->b_blkno == -1) { biodone(bp); return (0); } vp = ip->i_devvp; bp->b_dev = vp->v_rdev; VOCALL (vp->v_op, VOFFSET(vop_strategy), ap); return (0); } /* * Print out the contents of an inode. */ int ufs_print(v) void *v; { struct vop_print_args /* { struct vnode *a_vp; } */ *ap = v; register struct vnode *vp = ap->a_vp; register struct inode *ip = VTOI(vp); printf("tag VT_UFS, ino %d, on dev %d, %d", ip->i_number, major(ip->i_dev), minor(ip->i_dev)); #ifdef FIFO if (vp->v_type == VFIFO) fifo_printinfo(vp); #endif /* FIFO */ lockmgr_printinfo(&ip->i_lock); printf("\n"); return (0); } /* * Read wrapper for special devices. */ int ufsspec_read(v) void *v; { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; /* * Set access flag. */ VTOI(ap->a_vp)->i_flag |= IN_ACCESS; return (VOCALL (spec_vnodeop_p, VOFFSET(vop_read), ap)); } /* * Write wrapper for special devices. */ int ufsspec_write(v) void *v; { struct vop_write_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; /* * Set update and change flags. */ VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE; return (VOCALL (spec_vnodeop_p, VOFFSET(vop_write), ap)); } /* * Close wrapper for special devices. * * Update the times on the inode then do device close. */ int ufsspec_close(v) void *v; { struct vop_close_args /* { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct timespec ts; simple_lock(&vp->v_interlock); if (vp->v_usecount > 1) { TIMEVAL_TO_TIMESPEC(&time, &ts); ITIMES(ip, &ts, &ts, &ts); } simple_unlock(&vp->v_interlock); return (VOCALL (spec_vnodeop_p, VOFFSET(vop_close), ap)); } #ifdef FIFO /* * Read wrapper for fifo's */ int ufsfifo_read(v) void *v; { struct vop_read_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; extern int (**fifo_vnodeop_p) __P((void *)); /* * Set access flag. */ VTOI(ap->a_vp)->i_flag |= IN_ACCESS; return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_read), ap)); } /* * Write wrapper for fifo's. */ int ufsfifo_write(v) void *v; { struct vop_write_args /* { struct vnode *a_vp; struct uio *a_uio; int a_ioflag; struct ucred *a_cred; } */ *ap = v; extern int (**fifo_vnodeop_p) __P((void *)); /* * Set update and change flags. */ VTOI(ap->a_vp)->i_flag |= IN_CHANGE | IN_UPDATE; return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_write), ap)); } /* * Close wrapper for fifo's. * * Update the times on the inode then do device close. */ int ufsfifo_close(v) void *v; { struct vop_close_args /* { struct vnode *a_vp; int a_fflag; struct ucred *a_cred; struct proc *a_p; } */ *ap = v; extern int (**fifo_vnodeop_p) __P((void *)); struct vnode *vp = ap->a_vp; struct inode *ip = VTOI(vp); struct timespec ts; simple_lock(&vp->v_interlock); if (ap->a_vp->v_usecount > 1) { TIMEVAL_TO_TIMESPEC(&time, &ts); ITIMES(ip, &ts, &ts, &ts); } simple_unlock(&vp->v_interlock); return (VOCALL (fifo_vnodeop_p, VOFFSET(vop_close), ap)); } #endif /* FIFO */ /* * Return POSIX pathconf information applicable to ufs filesystems. */ int ufs_pathconf(v) void *v; { struct vop_pathconf_args /* { struct vnode *a_vp; int a_name; register_t *a_retval; } */ *ap = v; switch (ap->a_name) { case _PC_LINK_MAX: *ap->a_retval = LINK_MAX; return (0); case _PC_NAME_MAX: *ap->a_retval = NAME_MAX; return (0); case _PC_PATH_MAX: *ap->a_retval = PATH_MAX; return (0); case _PC_PIPE_BUF: *ap->a_retval = PIPE_BUF; return (0); case _PC_CHOWN_RESTRICTED: *ap->a_retval = 1; return (0); case _PC_NO_TRUNC: *ap->a_retval = 1; return (0); default: return (EINVAL); } /* NOTREACHED */ } /* * Advisory record locking support */ int ufs_advlock(v) void *v; { struct vop_advlock_args /* { struct vnode *a_vp; caddr_t a_id; int a_op; struct flock *a_fl; int a_flags; } */ *ap = v; register struct inode *ip = VTOI(ap->a_vp); return (lf_advlock(&ip->i_lockf, ip->i_ffs_size, ap->a_id, ap->a_op, ap->a_fl, ap->a_flags)); } /* * Initialize the vnode associated with a new inode, handle aliased * vnodes. */ int ufs_vinit(mntp, specops, fifoops, vpp) struct mount *mntp; int (**specops) __P((void *)); int (**fifoops) __P((void *)); struct vnode **vpp; { struct inode *ip; struct vnode *vp, *nvp; vp = *vpp; ip = VTOI(vp); switch(vp->v_type = IFTOVT(ip->i_ffs_mode)) { case VCHR: case VBLK: vp->v_op = specops; if ((nvp = checkalias(vp, ufs_rw32(ip->i_ffs_rdev, UFS_MPNEEDSWAP(vp->v_mount)), mntp)) != NULL) { /* * Discard unneeded vnode, but save its inode. * Note that the lock is carried over in the inode * to the replacement vnode. */ nvp->v_data = vp->v_data; vp->v_data = NULL; vp->v_op = spec_vnodeop_p; vrele(vp); vgone(vp); /* * Reinitialize aliased inode. */ vp = nvp; ip->i_vnode = vp; } break; case VFIFO: #ifdef FIFO vp->v_op = fifoops; break; #else return (EOPNOTSUPP); #endif case VNON: case VBAD: case VSOCK: case VLNK: case VDIR: case VREG: break; } if (ip->i_number == ROOTINO) vp->v_flag |= VROOT; /* * Initialize modrev times */ SETHIGH(ip->i_modrev, mono_time.tv_sec); SETLOW(ip->i_modrev, mono_time.tv_usec * 4294); *vpp = vp; return (0); } /* * Allocate a new inode. */ int ufs_makeinode(mode, dvp, vpp, cnp) int mode; struct vnode *dvp; struct vnode **vpp; struct componentname *cnp; { register struct inode *ip, *pdir; struct timespec ts; struct vnode *tvp; int error; pdir = VTOI(dvp); #ifdef DIAGNOSTIC if ((cnp->cn_flags & HASBUF) == 0) panic("ufs_makeinode: no name"); #endif *vpp = NULL; if ((mode & IFMT) == 0) mode |= IFREG; if ((error = VOP_VALLOC(dvp, mode, cnp->cn_cred, &tvp)) != 0) { free(cnp->cn_pnbuf, M_NAMEI); vput(dvp); return (error); } ip = VTOI(tvp); ip->i_ffs_gid = pdir->i_ffs_gid; ip->i_ffs_uid = cnp->cn_cred->cr_uid; #ifdef QUOTA if ((error = getinoquota(ip)) || (error = chkiq(ip, 1, cnp->cn_cred, 0))) { free(cnp->cn_pnbuf, M_NAMEI); VOP_VFREE(tvp, ip->i_number, mode); vput(tvp); vput(dvp); return (error); } #endif ip->i_flag |= IN_ACCESS | IN_CHANGE | IN_UPDATE; ip->i_ffs_mode = mode; tvp->v_type = IFTOVT(mode); /* Rest init'd in getnewvnode(). */ ip->i_ffs_nlink = 1; if ((ip->i_ffs_mode & ISGID) && !groupmember(ip->i_ffs_gid, cnp->cn_cred) && suser(cnp->cn_cred, NULL)) ip->i_ffs_mode &= ~ISGID; if (cnp->cn_flags & ISWHITEOUT) ip->i_ffs_flags |= UF_OPAQUE; /* * Make sure inode goes to disk before directory entry. */ TIMEVAL_TO_TIMESPEC(&time, &ts); if ((error = VOP_UPDATE(tvp, &ts, &ts, 1)) != 0) goto bad; if ((error = ufs_direnter(ip, dvp, cnp)) != 0) goto bad; if ((cnp->cn_flags & SAVESTART) == 0) FREE(cnp->cn_pnbuf, M_NAMEI); vput(dvp); *vpp = tvp; return (0); bad: /* * Write error occurred trying to update the inode * or the directory so must deallocate the inode. */ free(cnp->cn_pnbuf, M_NAMEI); vput(dvp); ip->i_ffs_nlink = 0; ip->i_flag |= IN_CHANGE; vput(tvp); return (error); }