+/*
+ * Copyright (c) 1982, 1986, 1989 Regents of the University of California.
+ * All rights reserved.
+ *
+ * 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 7.64 (Berkeley) 5/16/91
+ */
+
+#include "param.h"
+#include "systm.h"
+#include "namei.h"
+#include "resourcevar.h"
+#include "kernel.h"
+#include "file.h"
+#include "stat.h"
+#include "buf.h"
+#include "proc.h"
+#include "conf.h"
+#include "mount.h"
+#include "vnode.h"
+#include "specdev.h"
+#include "fifo.h"
+#include "malloc.h"
+
+#include "lockf.h"
+#include "quota.h"
+#include "inode.h"
+#include "dir.h"
+#include "fs.h"
+
+/*
+ * Create a regular file
+ */
+ufs_create(ndp, vap, p)
+ struct nameidata *ndp;
+ struct vattr *vap;
+ struct proc *p;
+{
+ struct inode *ip;
+ int error;
+
+ if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip))
+ return (error);
+ ndp->ni_vp = ITOV(ip);
+ return (0);
+}
+
+/*
+ * Mknod vnode call
+ */
+/* ARGSUSED */
+ufs_mknod(ndp, vap, cred, p)
+ struct nameidata *ndp;
+ struct ucred *cred;
+ struct vattr *vap;
+ struct proc *p;
+{
+ register struct vnode *vp;
+ struct inode *ip;
+ int error;
+
+ if (error = maknode(MAKEIMODE(vap->va_type, vap->va_mode), ndp, &ip))
+ return (error);
+ ip->i_flag |= IACC|IUPD|ICHG;
+ 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_rdev = vap->va_rdev;
+ }
+ /*
+ * Remove inode so that it will be reloaded by iget and
+ * checked to see if it is an alias of an existing entry
+ * in the inode cache.
+ */
+ vp = ITOV(ip);
+ vput(vp);
+ vp->v_type = VNON;
+ vgone(vp);
+ return (0);
+}
+
+/*
+ * Open called.
+ *
+ * Nothing to do.
+ */
+/* ARGSUSED */
+ufs_open(vp, mode, cred, p)
+ struct vnode *vp;
+ int mode;
+ struct ucred *cred;
+ struct proc *p;
+{
+
+ return (0);
+}
+
+/*
+ * Close called
+ *
+ * Update the times on the inode.
+ */
+/* ARGSUSED */
+ufs_close(vp, fflag, cred, p)
+ struct vnode *vp;
+ int fflag;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+
+ if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED))
+ ITIMES(ip, &time, &time);
+ return (0);
+}
+
+/*
+ * Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
+ * The mode is shifted to select the owner/group/other fields. The
+ * super user is granted all permissions.
+ */
+ufs_access(vp, mode, cred, p)
+ struct vnode *vp;
+ register int mode;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+ register gid_t *gp;
+ int i, error;
+
+#ifdef DIAGNOSTIC
+ if (!VOP_ISLOCKED(vp)) {
+ vprint("ufs_access: not locked", vp);
+ panic("ufs_access: not locked");
+ }
+#endif
+#ifdef QUOTA
+ if (mode & VWRITE) {
+ switch (vp->v_type) {
+ case VREG: case VDIR: case VLNK:
+ if (error = getinoquota(ip))
+ return (error);
+ }
+ }
+#endif /* QUOTA */
+ /*
+ * If you're the super-user, you always get access.
+ */
+ if (cred->cr_uid == 0)
+ return (0);
+ /*
+ * Access check is based on only one of owner, group, public.
+ * If not owner, then check group. If not a member of the
+ * group, then check public access.
+ */
+ if (cred->cr_uid != ip->i_uid) {
+ mode >>= 3;
+ gp = cred->cr_groups;
+ for (i = 0; i < cred->cr_ngroups; i++, gp++)
+ if (ip->i_gid == *gp)
+ goto found;
+ mode >>= 3;
+found:
+ ;
+ }
+ if ((ip->i_mode & mode) != 0)
+ return (0);
+ return (EACCES);
+}
+
+/* ARGSUSED */
+ufs_getattr(vp, vap, cred, p)
+ struct vnode *vp;
+ register struct vattr *vap;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+
+ ITIMES(ip, &time, &time);
+ /*
+ * Copy from inode table
+ */
+ vap->va_fsid = ip->i_dev;
+ vap->va_fileid = ip->i_number;
+ vap->va_mode = ip->i_mode & ~IFMT;
+ vap->va_nlink = ip->i_nlink;
+ vap->va_uid = ip->i_uid;
+ vap->va_gid = ip->i_gid;
+ vap->va_rdev = (dev_t)ip->i_rdev;
+#ifdef tahoe
+ vap->va_size = ip->i_size;
+ vap->va_size_rsv = 0;
+#else
+ vap->va_qsize = ip->i_din.di_qsize;
+#endif
+ vap->va_atime.tv_sec = ip->i_atime;
+ vap->va_atime.tv_usec = 0;
+ vap->va_mtime.tv_sec = ip->i_mtime;
+ vap->va_mtime.tv_usec = 0;
+ vap->va_ctime.tv_sec = ip->i_ctime;
+ vap->va_ctime.tv_usec = 0;
+ vap->va_flags = ip->i_flags;
+ vap->va_gen = ip->i_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 = ip->i_fs->fs_bsize;
+ vap->va_bytes = dbtob(ip->i_blocks);
+ vap->va_bytes_rsv = 0;
+ vap->va_type = vp->v_type;
+ return (0);
+}
+
+/*
+ * Set attribute vnode op. called from several syscalls
+ */
+ufs_setattr(vp, vap, cred, p)
+ register struct vnode *vp;
+ register struct vattr *vap;
+ register struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+ int error = 0;
+
+ /*
+ * Check for unsetable 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);
+ }
+ /*
+ * Go through the fields and update iff not VNOVAL.
+ */
+ if (vap->va_uid != (u_short)VNOVAL || vap->va_gid != (u_short)VNOVAL)
+ if (error = chown1(vp, vap->va_uid, vap->va_gid, p))
+ return (error);
+ if (vap->va_size != VNOVAL) {
+ if (vp->v_type == VDIR)
+ return (EISDIR);
+ if (error = itrunc(ip, vap->va_size, 0)) /* XXX IO_SYNC? */
+ return (error);
+ }
+ if (vap->va_atime.tv_sec != VNOVAL || vap->va_mtime.tv_sec != VNOVAL) {
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &p->p_acflag)))
+ return (error);
+ if (vap->va_atime.tv_sec != VNOVAL)
+ ip->i_flag |= IACC;
+ if (vap->va_mtime.tv_sec != VNOVAL)
+ ip->i_flag |= IUPD;
+ ip->i_flag |= ICHG;
+ if (error = iupdat(ip, &vap->va_atime, &vap->va_mtime, 1))
+ return (error);
+ }
+ if (vap->va_mode != (u_short)VNOVAL)
+ error = chmod1(vp, (int)vap->va_mode, p);
+ if (vap->va_flags != VNOVAL) {
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &p->p_acflag)))
+ return (error);
+ if (cred->cr_uid == 0) {
+ ip->i_flags = vap->va_flags;
+ } else {
+ ip->i_flags &= 0xffff0000;
+ ip->i_flags |= (vap->va_flags & 0xffff);
+ }
+ ip->i_flag |= ICHG;
+ }
+ return (error);
+}
+
+/*
+ * Change the mode on a file.
+ * Inode must be locked before calling.
+ */
+chmod1(vp, mode, p)
+ register struct vnode *vp;
+ register int mode;
+ struct proc *p;
+{
+ register struct ucred *cred = p->p_ucred;
+ register struct inode *ip = VTOI(vp);
+ int error;
+
+ if (cred->cr_uid != ip->i_uid &&
+ (error = suser(cred, &p->p_acflag)))
+ return (error);
+ if (cred->cr_uid) {
+ if (vp->v_type != VDIR && (mode & ISVTX))
+ return (EFTYPE);
+ if (!groupmember(ip->i_gid, cred) && (mode & ISGID))
+ return (EPERM);
+ }
+ ip->i_mode &= ~07777;
+ ip->i_mode |= mode & 07777;
+ ip->i_flag |= ICHG;
+ if ((vp->v_flag & VTEXT) && (ip->i_mode & ISVTX) == 0)
+ (void) vnode_pager_uncache(vp);
+ return (0);
+}
+
+/*
+ * Perform chown operation on inode ip;
+ * inode must be locked prior to call.
+ */
+chown1(vp, uid, gid, p)
+ register struct vnode *vp;
+ uid_t uid;
+ gid_t gid;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+ register struct ucred *cred = p->p_ucred;
+ uid_t ouid;
+ gid_t ogid;
+ int error = 0;
+#ifdef QUOTA
+ register int i;
+ long change;
+#endif
+
+ if (uid == (u_short)VNOVAL)
+ uid = ip->i_uid;
+ if (gid == (u_short)VNOVAL)
+ gid = ip->i_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 must be superuser or the call fails.
+ */
+ if ((cred->cr_uid != ip->i_uid || uid != ip->i_uid ||
+ !groupmember((gid_t)gid, cred)) &&
+ (error = suser(cred, &p->p_acflag)))
+ return (error);
+ ouid = ip->i_uid;
+ ogid = ip->i_gid;
+#ifdef QUOTA
+ if (error = getinoquota(ip))
+ 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_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_uid = uid;
+ ip->i_gid = gid;
+#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_uid = ouid;
+ ip->i_gid = ogid;
+ 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 */
+ if (ouid != uid || ogid != gid)
+ ip->i_flag |= ICHG;
+ if (ouid != uid && cred->cr_uid != 0)
+ ip->i_mode &= ~ISUID;
+ if (ogid != gid && cred->cr_uid != 0)
+ ip->i_mode &= ~ISGID;
+ return (0);
+}
+
+/*
+ * Vnode op for reading.
+ */
+/* ARGSUSED */
+ufs_read(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ register struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+ register struct inode *ip = VTOI(vp);
+ register struct fs *fs;
+ struct buf *bp;
+ daddr_t lbn, bn, rablock;
+ int size, diff, error = 0;
+ long n, on, type;
+
+#ifdef DIAGNOSTIC
+ if (uio->uio_rw != UIO_READ)
+ panic("ufs_read mode");
+ type = ip->i_mode & IFMT;
+ if (type != IFDIR && type != IFREG && type != IFLNK)
+ panic("ufs_read type");
+#endif
+ if (uio->uio_resid == 0)
+ return (0);
+ if (uio->uio_offset < 0)
+ return (EINVAL);
+ ip->i_flag |= IACC;
+ fs = ip->i_fs;
+ do {
+ lbn = lblkno(fs, uio->uio_offset);
+ on = blkoff(fs, uio->uio_offset);
+ n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid);
+ diff = ip->i_size - uio->uio_offset;
+ if (diff <= 0)
+ return (0);
+ if (diff < n)
+ n = diff;
+ size = blksize(fs, ip, lbn);
+ rablock = lbn + 1;
+ if (vp->v_lastr + 1 == lbn &&
+ lblktosize(fs, rablock) < ip->i_size)
+ error = breada(ITOV(ip), lbn, size, rablock,
+ blksize(fs, ip, rablock), NOCRED, &bp);
+ else
+ error = bread(ITOV(ip), lbn, size, NOCRED, &bp);
+ vp->v_lastr = lbn;
+ n = MIN(n, size - bp->b_resid);
+ if (error) {
+ brelse(bp);
+ return (error);
+ }
+ error = uiomove(bp->b_un.b_addr + on, (int)n, uio);
+ if (n + on == fs->fs_bsize || uio->uio_offset == ip->i_size)
+ bp->b_flags |= B_AGE;
+ brelse(bp);
+ } while (error == 0 && uio->uio_resid > 0 && n != 0);
+ return (error);
+}
+
+/*
+ * Vnode op for writing.
+ */
+ufs_write(vp, uio, ioflag, cred)
+ register struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+ struct proc *p = uio->uio_procp;
+ register struct inode *ip = VTOI(vp);
+ register struct fs *fs;
+ struct buf *bp;
+ daddr_t lbn, bn;
+ u_long osize;
+ int n, on, flags;
+ int size, resid, error = 0;
+
+#ifdef DIAGNOSTIC
+ if (uio->uio_rw != UIO_WRITE)
+ panic("ufs_write mode");
+#endif
+ switch (vp->v_type) {
+ case VREG:
+ if (ioflag & IO_APPEND)
+ uio->uio_offset = ip->i_size;
+ /* fall through */
+ case VLNK:
+ break;
+
+ case VDIR:
+ if ((ioflag & IO_SYNC) == 0)
+ panic("ufs_write nonsync dir write");
+ break;
+
+ default:
+ panic("ufs_write type");
+ }
+ if (uio->uio_offset < 0)
+ return (EINVAL);
+ if (uio->uio_resid == 0)
+ return (0);
+ /*
+ * Maybe this should be above the vnode op call, but so long as
+ * file servers have no limits, i don't think it matters
+ */
+ if (vp->v_type == VREG && p &&
+ uio->uio_offset + uio->uio_resid >
+ p->p_rlimit[RLIMIT_FSIZE].rlim_cur) {
+ psignal(p, SIGXFSZ);
+ return (EFBIG);
+ }
+ resid = uio->uio_resid;
+ osize = ip->i_size;
+ fs = ip->i_fs;
+ flags = 0;
+ if (ioflag & IO_SYNC)
+ flags = B_SYNC;
+ do {
+ lbn = lblkno(fs, uio->uio_offset);
+ on = blkoff(fs, uio->uio_offset);
+ n = MIN((unsigned)(fs->fs_bsize - on), uio->uio_resid);
+ if (n < fs->fs_bsize)
+ flags |= B_CLRBUF;
+ else
+ flags &= ~B_CLRBUF;
+ if (error = balloc(ip, lbn, (int)(on + n), &bp, flags))
+ break;
+ bn = bp->b_blkno;
+ if (uio->uio_offset + n > ip->i_size) {
+ ip->i_size = uio->uio_offset + n;
+ vnode_pager_setsize(vp, ip->i_size);
+ }
+ size = blksize(fs, ip, lbn);
+ (void) vnode_pager_uncache(vp);
+ n = MIN(n, size - bp->b_resid);
+ error = uiomove(bp->b_un.b_addr + on, n, uio);
+ if (ioflag & IO_SYNC)
+ (void) bwrite(bp);
+ else if (n + on == fs->fs_bsize) {
+ bp->b_flags |= B_AGE;
+ bawrite(bp);
+ } else
+ bdwrite(bp);
+ ip->i_flag |= IUPD|ICHG;
+ if (cred->cr_uid != 0)
+ ip->i_mode &= ~(ISUID|ISGID);
+ } while (error == 0 && uio->uio_resid > 0 && n != 0);
+ if (error && (ioflag & IO_UNIT)) {
+ (void) itrunc(ip, osize, ioflag & IO_SYNC);
+ uio->uio_offset -= resid - uio->uio_resid;
+ uio->uio_resid = resid;
+ }
+ if (!error && (ioflag & IO_SYNC))
+ error = iupdat(ip, &time, &time, 1);
+ return (error);
+}
+
+/* ARGSUSED */
+ufs_ioctl(vp, com, data, fflag, cred, p)
+ struct vnode *vp;
+ int com;
+ caddr_t data;
+ int fflag;
+ struct ucred *cred;
+ struct proc *p;
+{
+
+ return (ENOTTY);
+}
+
+/* ARGSUSED */
+ufs_select(vp, which, fflags, cred, p)
+ struct vnode *vp;
+ int which, fflags;
+ struct ucred *cred;
+ struct proc *p;
+{
+
+ /*
+ * We should really check to see if I/O is possible.
+ */
+ return (1);
+}
+
+/*
+ * Mmap a file
+ *
+ * NB Currently unsupported.
+ */
+/* ARGSUSED */
+ufs_mmap(vp, fflags, cred, p)
+ struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
+ struct proc *p;
+{
+
+ return (EINVAL);
+}
+
+/*
+ * Synch an open file.
+ */
+/* ARGSUSED */
+ufs_fsync(vp, fflags, cred, waitfor, p)
+ struct vnode *vp;
+ int fflags;
+ struct ucred *cred;
+ int waitfor;
+ struct proc *p;
+{
+ struct inode *ip = VTOI(vp);
+
+ if (fflags & FWRITE)
+ ip->i_flag |= ICHG;
+ vflushbuf(vp, waitfor == MNT_WAIT ? B_SYNC : 0);
+ return (iupdat(ip, &time, &time, waitfor == MNT_WAIT));
+}
+
+/*
+ * Seek on a file
+ *
+ * Nothing to do, so just return.
+ */
+/* ARGSUSED */
+ufs_seek(vp, oldoff, newoff, cred)
+ struct vnode *vp;
+ off_t oldoff, newoff;
+ struct ucred *cred;
+{
+
+ return (0);
+}
+
+/*
+ * ufs remove
+ * Hard to avoid races here, especially
+ * in unlinking directories.
+ */
+ufs_remove(ndp, p)
+ struct nameidata *ndp;
+ struct proc *p;
+{
+ register struct inode *ip, *dp;
+ int error;
+
+ ip = VTOI(ndp->ni_vp);
+ dp = VTOI(ndp->ni_dvp);
+ error = dirremove(ndp);
+ if (!error) {
+ ip->i_nlink--;
+ ip->i_flag |= ICHG;
+ }
+ if (dp == ip)
+ vrele(ITOV(ip));
+ else
+ iput(ip);
+ iput(dp);
+ return (error);
+}
+
+/*
+ * link vnode call
+ */
+ufs_link(vp, ndp, p)
+ register struct vnode *vp;
+ register struct nameidata *ndp;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+ int error;
+
+#ifdef DIANOSTIC
+ if ((ndp->ni_nameiop & HASBUF) == 0)
+ panic("ufs_link: no name");
+#endif
+ if ((unsigned short)ip->i_nlink >= LINK_MAX) {
+ free(ndp->ni_pnbuf, M_NAMEI);
+ return (EMLINK);
+ }
+ if (ndp->ni_dvp != vp)
+ ILOCK(ip);
+ ip->i_nlink++;
+ ip->i_flag |= ICHG;
+ error = iupdat(ip, &time, &time, 1);
+ if (!error)
+ error = direnter(ip, ndp);
+ if (ndp->ni_dvp != vp)
+ IUNLOCK(ip);
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ vput(ndp->ni_dvp);
+ if (error) {
+ ip->i_nlink--;
+ ip->i_flag |= ICHG;
+ }
+ 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.
+ */
+ufs_rename(fndp, tndp, p)
+ register struct nameidata *fndp, *tndp;
+ struct proc *p;
+{
+ register struct inode *ip, *xp, *dp;
+ struct dirtemplate dirbuf;
+ int doingdirectory = 0, oldparent = 0, newparent = 0;
+ int error = 0;
+
+#ifdef DIANOSTIC
+ if ((tndp->ni_nameiop & HASBUF) == 0 ||
+ (fndp->ni_nameiop & HASBUF) == 0)
+ panic("ufs_rename: no name");
+#endif
+ dp = VTOI(fndp->ni_dvp);
+ ip = VTOI(fndp->ni_vp);
+ /*
+ * Check if just deleting a link name.
+ */
+ if (fndp->ni_vp == tndp->ni_vp) {
+ VOP_ABORTOP(tndp);
+ vput(tndp->ni_dvp);
+ vput(tndp->ni_vp);
+ vrele(fndp->ni_dvp);
+ if ((ip->i_mode&IFMT) == IFDIR) {
+ VOP_ABORTOP(fndp);
+ vrele(fndp->ni_vp);
+ return (EINVAL);
+ }
+ doingdirectory = 0;
+ goto unlinkit;
+ }
+ ILOCK(ip);
+ if ((ip->i_mode&IFMT) == IFDIR) {
+ /*
+ * Avoid ".", "..", and aliases of "." for obvious reasons.
+ */
+ if ((fndp->ni_namelen == 1 && fndp->ni_ptr[0] == '.') ||
+ dp == ip || fndp->ni_isdotdot || (ip->i_flag & IRENAME)) {
+ VOP_ABORTOP(tndp);
+ vput(tndp->ni_dvp);
+ if (tndp->ni_vp)
+ vput(tndp->ni_vp);
+ VOP_ABORTOP(fndp);
+ vrele(fndp->ni_dvp);
+ vput(fndp->ni_vp);
+ return (EINVAL);
+ }
+ ip->i_flag |= IRENAME;
+ oldparent = dp->i_number;
+ doingdirectory++;
+ }
+ vrele(fndp->ni_dvp);
+
+ /*
+ * 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_nlink++;
+ ip->i_flag |= ICHG;
+ error = iupdat(ip, &time, &time, 1);
+ IUNLOCK(ip);
+
+ /*
+ * When the target exists, both the directory
+ * and target vnodes are returned locked.
+ */
+ dp = VTOI(tndp->ni_dvp);
+ xp = NULL;
+ if (tndp->ni_vp)
+ xp = VTOI(tndp->ni_vp);
+ /*
+ * 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().
+ */
+ if (oldparent != dp->i_number)
+ newparent = dp->i_number;
+ if (doingdirectory && newparent) {
+ VOP_LOCK(fndp->ni_vp);
+ error = ufs_access(fndp->ni_vp, VWRITE, tndp->ni_cred, p);
+ VOP_UNLOCK(fndp->ni_vp);
+ if (error)
+ goto bad;
+ if (xp != NULL)
+ iput(xp);
+ if (error = checkpath(ip, dp, tndp->ni_cred))
+ goto out;
+ if ((tndp->ni_nameiop & SAVESTART) == 0)
+ panic("ufs_rename: lost to startdir");
+ if (error = lookup(tndp, p))
+ goto out;
+ dp = VTOI(tndp->ni_dvp);
+ xp = NULL;
+ if (tndp->ni_vp)
+ xp = VTOI(tndp->ni_vp);
+ }
+ /*
+ * 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 ((unsigned short)dp->i_nlink >= LINK_MAX) {
+ error = EMLINK;
+ goto bad;
+ }
+ dp->i_nlink++;
+ dp->i_flag |= ICHG;
+ if (error = iupdat(dp, &time, &time, 1))
+ goto bad;
+ }
+ if (error = direnter(ip, tndp)) {
+ if (doingdirectory && newparent) {
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ (void) iupdat(dp, &time, &time, 1);
+ }
+ goto bad;
+ }
+ iput(dp);
+ } 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_mode & ISVTX) && tndp->ni_cred->cr_uid != 0 &&
+ tndp->ni_cred->cr_uid != dp->i_uid &&
+ xp->i_uid != tndp->ni_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_mode&IFMT) == IFDIR) {
+ if (!dirempty(xp, dp->i_number, tndp->ni_cred) ||
+ xp->i_nlink > 2) {
+ error = ENOTEMPTY;
+ goto bad;
+ }
+ if (!doingdirectory) {
+ error = ENOTDIR;
+ goto bad;
+ }
+ cache_purge(ITOV(dp));
+ } else if (doingdirectory) {
+ error = EISDIR;
+ goto bad;
+ }
+ if (error = dirrewrite(dp, ip, tndp))
+ 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_nlink--;
+ dp->i_flag |= ICHG;
+ }
+ vput(ITOV(dp));
+ /*
+ * 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_nlink--;
+ if (doingdirectory) {
+ if (--xp->i_nlink != 0)
+ panic("rename: linked directory");
+ error = itrunc(xp, (u_long)0, IO_SYNC);
+ }
+ xp->i_flag |= ICHG;
+ iput(xp);
+ xp = NULL;
+ }
+
+ /*
+ * 3) Unlink the source.
+ */
+unlinkit:
+ fndp->ni_nameiop &= ~MODMASK;
+ fndp->ni_nameiop |= LOCKPARENT | LOCKLEAF;
+ if ((fndp->ni_nameiop & SAVESTART) == 0)
+ panic("ufs_rename: lost from startdir");
+ (void) lookup(fndp, p);
+ if (fndp->ni_vp != NULL) {
+ xp = VTOI(fndp->ni_vp);
+ dp = VTOI(fndp->ni_dvp);
+ } else {
+ /*
+ * From name has disappeared.
+ */
+ if (doingdirectory)
+ panic("rename: lost dir entry");
+ vrele(ITOV(ip));
+ 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_nlink--;
+ dp->i_flag |= ICHG;
+ error = vn_rdwr(UIO_READ, ITOV(xp), (caddr_t)&dirbuf,
+ sizeof (struct dirtemplate), (off_t)0,
+ UIO_SYSSPACE, IO_NODELOCKED,
+ tndp->ni_cred, (int *)0, (struct proc *)0);
+ if (error == 0) {
+ if (dirbuf.dotdot_namlen != 2 ||
+ dirbuf.dotdot_name[0] != '.' ||
+ dirbuf.dotdot_name[1] != '.') {
+ dirbad(xp, 12, "rename: mangled dir");
+ } else {
+ dirbuf.dotdot_ino = newparent;
+ (void) vn_rdwr(UIO_WRITE, ITOV(xp),
+ (caddr_t)&dirbuf,
+ sizeof (struct dirtemplate),
+ (off_t)0, UIO_SYSSPACE,
+ IO_NODELOCKED|IO_SYNC,
+ tndp->ni_cred, (int *)0,
+ (struct proc *)0);
+ cache_purge(ITOV(dp));
+ }
+ }
+ }
+ error = dirremove(fndp);
+ if (!error) {
+ xp->i_nlink--;
+ xp->i_flag |= ICHG;
+ }
+ xp->i_flag &= ~IRENAME;
+ }
+ if (dp)
+ vput(ITOV(dp));
+ if (xp)
+ vput(ITOV(xp));
+ vrele(ITOV(ip));
+ return (error);
+
+bad:
+ if (xp)
+ vput(ITOV(xp));
+ vput(ITOV(dp));
+out:
+ ip->i_nlink--;
+ ip->i_flag |= ICHG;
+ vrele(ITOV(ip));
+ return (error);
+}
+
+/*
+ * A virgin directory (no blushing please).
+ */
+struct dirtemplate mastertemplate = {
+ 0, 12, 1, ".",
+ 0, DIRBLKSIZ - 12, 2, ".."
+};
+
+/*
+ * Mkdir system call
+ */
+ufs_mkdir(ndp, vap, p)
+ struct nameidata *ndp;
+ struct vattr *vap;
+ struct proc *p;
+{
+ register struct inode *ip, *dp;
+ struct inode *tip;
+ struct vnode *dvp;
+ struct dirtemplate dirtemplate;
+ int error;
+ int dmode;
+
+#ifdef DIANOSTIC
+ if ((ndp->ni_nameiop & HASBUF) == 0)
+ panic("ufs_mkdir: no name");
+#endif
+ dvp = ndp->ni_dvp;
+ dp = VTOI(dvp);
+ if ((unsigned short)dp->i_nlink >= LINK_MAX) {
+ free(ndp->ni_pnbuf, M_NAMEI);
+ iput(dp);
+ return (EMLINK);
+ }
+ dmode = vap->va_mode&0777;
+ dmode |= IFDIR;
+ /*
+ * Must simulate part of maknode 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 = ialloc(dp, dirpref(dp->i_fs), dmode, ndp->ni_cred, &tip)) {
+ free(ndp->ni_pnbuf, M_NAMEI);
+ iput(dp);
+ return (error);
+ }
+ ip = tip;
+ ip->i_uid = ndp->ni_cred->cr_uid;
+ ip->i_gid = dp->i_gid;
+#ifdef QUOTA
+ if ((error = getinoquota(ip)) ||
+ (error = chkiq(ip, 1, ndp->ni_cred, 0))) {
+ free(ndp->ni_pnbuf, M_NAMEI);
+ ifree(ip, ip->i_number, dmode);
+ iput(ip);
+ iput(dp);
+ return (error);
+ }
+#endif
+ ip->i_flag |= IACC|IUPD|ICHG;
+ ip->i_mode = dmode;
+ ITOV(ip)->v_type = VDIR; /* Rest init'd in iget() */
+ ip->i_nlink = 2;
+ error = iupdat(ip, &time, &time, 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_nlink++;
+ dp->i_flag |= ICHG;
+ if (error = iupdat(dp, &time, &time, 1))
+ goto bad;
+
+ /*
+ * Initialize directory with "."
+ * and ".." from static template.
+ */
+ dirtemplate = mastertemplate;
+ dirtemplate.dot_ino = ip->i_number;
+ dirtemplate.dotdot_ino = dp->i_number;
+ error = vn_rdwr(UIO_WRITE, ITOV(ip), (caddr_t)&dirtemplate,
+ sizeof (dirtemplate), (off_t)0, UIO_SYSSPACE,
+ IO_NODELOCKED|IO_SYNC, ndp->ni_cred, (int *)0, (struct proc *)0);
+ if (error) {
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ goto bad;
+ }
+ if (DIRBLKSIZ > dp->i_fs->fs_fsize) {
+ panic("mkdir: blksize"); /* XXX - should grow w/balloc() */
+ } else {
+ ip->i_size = DIRBLKSIZ;
+ ip->i_flag |= ICHG;
+ }
+ /*
+ * Directory all set up, now
+ * install the entry for it in
+ * the parent directory.
+ */
+ if (error = direnter(ip, ndp)) {
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ }
+bad:
+ /*
+ * No need to do an explicit itrunc here,
+ * vrele will do this for us because we set
+ * the link count to 0.
+ */
+ if (error) {
+ ip->i_nlink = 0;
+ ip->i_flag |= ICHG;
+ iput(ip);
+ } else
+ ndp->ni_vp = ITOV(ip);
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ iput(dp);
+ return (error);
+}
+
+/*
+ * Rmdir system call.
+ */
+ufs_rmdir(ndp, p)
+ register struct nameidata *ndp;
+ struct proc *p;
+{
+ register struct inode *ip, *dp;
+ int error = 0;
+
+ ip = VTOI(ndp->ni_vp);
+ dp = VTOI(ndp->ni_dvp);
+ /*
+ * No rmdir "." please.
+ */
+ if (dp == ip) {
+ vrele(ITOV(dp));
+ iput(ip);
+ 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.)
+ */
+ if (ip->i_nlink != 2 || !dirempty(ip, dp->i_number, ndp->ni_cred)) {
+ error = ENOTEMPTY;
+ goto out;
+ }
+ /*
+ * Delete reference to directory before purging
+ * inode. If we crash in between, the directory
+ * will be reattached to lost+found,
+ */
+ if (error = dirremove(ndp))
+ goto out;
+ dp->i_nlink--;
+ dp->i_flag |= ICHG;
+ cache_purge(ITOV(dp));
+ iput(dp);
+ ndp->ni_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_nlink -= 2;
+ error = itrunc(ip, (u_long)0, IO_SYNC);
+ cache_purge(ITOV(ip));
+out:
+ if (ndp->ni_dvp)
+ iput(dp);
+ iput(ip);
+ return (error);
+}
+
+/*
+ * symlink -- make a symbolic link
+ */
+ufs_symlink(ndp, vap, target, p)
+ struct nameidata *ndp;
+ struct vattr *vap;
+ char *target;
+ struct proc *p;
+{
+ struct inode *ip;
+ int error;
+
+ error = maknode(IFLNK | vap->va_mode, ndp, &ip);
+ if (error)
+ return (error);
+ error = vn_rdwr(UIO_WRITE, ITOV(ip), target, strlen(target), (off_t)0,
+ UIO_SYSSPACE, IO_NODELOCKED, ndp->ni_cred, (int *)0,
+ (struct proc *)0);
+ iput(ip);
+ return (error);
+}
+
+/*
+ * Vnode op for read and write
+ */
+ufs_readdir(vp, uio, cred, eofflagp)
+ struct vnode *vp;
+ register struct uio *uio;
+ struct ucred *cred;
+ int *eofflagp;
+{
+ int count, lost, error;
+
+ count = uio->uio_resid;
+ count &= ~(DIRBLKSIZ - 1);
+ lost = uio->uio_resid - count;
+ if (count < DIRBLKSIZ || (uio->uio_offset & (DIRBLKSIZ -1)))
+ return (EINVAL);
+ uio->uio_resid = count;
+ uio->uio_iov->iov_len = count;
+ error = ufs_read(vp, uio, 0, cred);
+ uio->uio_resid += lost;
+ if ((VTOI(vp)->i_size - uio->uio_offset) <= 0)
+ *eofflagp = 1;
+ else
+ *eofflagp = 0;
+ return (error);
+}
+
+/*
+ * Return target name of a symbolic link
+ */
+ufs_readlink(vp, uiop, cred)
+ struct vnode *vp;
+ struct uio *uiop;
+ struct ucred *cred;
+{
+
+ return (ufs_read(vp, uiop, 0, cred));
+}
+
+/*
+ * Ufs abort op, called after namei() when a CREATE/DELETE isn't actually
+ * done. If a buffer has been saved in anticipation of a CREATE, delete it.
+ */
+/* ARGSUSED */
+ufs_abortop(ndp)
+ struct nameidata *ndp;
+{
+
+ if ((ndp->ni_nameiop & (HASBUF | SAVESTART)) == HASBUF)
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ return (0);
+}
+
+/*
+ * Lock an inode.
+ */
+ufs_lock(vp)
+ struct vnode *vp;
+{
+ register struct inode *ip = VTOI(vp);
+
+ ILOCK(ip);
+ return (0);
+}
+
+/*
+ * Unlock an inode.
+ */
+ufs_unlock(vp)
+ struct vnode *vp;
+{
+ register struct inode *ip = VTOI(vp);
+
+ if (!(ip->i_flag & ILOCKED))
+ panic("ufs_unlock NOT LOCKED");
+ IUNLOCK(ip);
+ return (0);
+}
+
+/*
+ * Check for a locked inode.
+ */
+ufs_islocked(vp)
+ struct vnode *vp;
+{
+
+ if (VTOI(vp)->i_flag & ILOCKED)
+ return (1);
+ return (0);
+}
+
+/*
+ * Get access to bmap
+ */
+ufs_bmap(vp, bn, vpp, bnp)
+ struct vnode *vp;
+ daddr_t bn;
+ struct vnode **vpp;
+ daddr_t *bnp;
+{
+ struct inode *ip = VTOI(vp);
+
+ if (vpp != NULL)
+ *vpp = ip->i_devvp;
+ if (bnp == NULL)
+ return (0);
+ return (bmap(ip, bn, bnp));
+}
+
+/*
+ * Calculate the logical to physical mapping if not done already,
+ * then call the device strategy routine.
+ */
+int checkoverlap = 0;
+
+ufs_strategy(bp)
+ register struct buf *bp;
+{
+ register struct inode *ip = VTOI(bp->b_vp);
+ struct vnode *vp;
+ int error;
+
+ if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
+ panic("ufs_strategy: spec");
+ if (bp->b_blkno == bp->b_lblkno) {
+ if (error = bmap(ip, bp->b_lblkno, &bp->b_blkno))
+ return (error);
+ if ((long)bp->b_blkno == -1)
+ clrbuf(bp);
+ }
+ if ((long)bp->b_blkno == -1) {
+ biodone(bp);
+ return (0);
+ }
+#ifdef DIAGNOSTIC
+ if (checkoverlap) {
+ register struct buf *ep;
+ struct buf *ebp;
+ daddr_t start, last;
+
+ ebp = &buf[nbuf];
+ start = bp->b_blkno;
+ last = start + btodb(bp->b_bcount) - 1;
+ for (ep = buf; ep < ebp; ep++) {
+ if (ep == bp || (ep->b_flags & B_INVAL) ||
+ ep->b_vp == NULLVP)
+ continue;
+ if (VOP_BMAP(ep->b_vp, (daddr_t)0, &vp, (daddr_t)0))
+ continue;
+ if (vp != ip->i_devvp)
+ continue;
+ /* look for overlap */
+ if (ep->b_bcount == 0 || ep->b_blkno > last ||
+ ep->b_blkno + btodb(ep->b_bcount) <= start)
+ continue;
+ vprint("Disk overlap", vp);
+ printf("\tstart %d, end %d overlap start %d, end %d\n",
+ start, last, ep->b_blkno,
+ ep->b_blkno + btodb(ep->b_bcount) - 1);
+ panic("Disk buffer overlap");
+ }
+ }
+#endif /* DIAGNOSTIC */
+ vp = ip->i_devvp;
+ bp->b_dev = vp->v_rdev;
+ (*(vp->v_op->vop_strategy))(bp);
+ return (0);
+}
+
+/*
+ * Print out the contents of an inode.
+ */
+ufs_print(vp)
+ struct vnode *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 */
+ printf("%s\n", (ip->i_flag & ILOCKED) ? " (LOCKED)" : "");
+ if (ip->i_spare0 == 0)
+ return;
+ printf("\towner pid %d", ip->i_spare0);
+ if (ip->i_spare1)
+ printf(" waiting pid %d", ip->i_spare1);
+ printf("\n");
+}
+
+/*
+ * Read wrapper for special devices.
+ */
+ufsspec_read(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+
+ /*
+ * Set access flag.
+ */
+ VTOI(vp)->i_flag |= IACC;
+ return (spec_read(vp, uio, ioflag, cred));
+}
+
+/*
+ * Write wrapper for special devices.
+ */
+ufsspec_write(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+
+ /*
+ * Set update and change flags.
+ */
+ VTOI(vp)->i_flag |= IUPD|ICHG;
+ return (spec_write(vp, uio, ioflag, cred));
+}
+
+/*
+ * Close wrapper for special devices.
+ *
+ * Update the times on the inode then do device close.
+ */
+ufsspec_close(vp, fflag, cred, p)
+ struct vnode *vp;
+ int fflag;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+
+ if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED))
+ ITIMES(ip, &time, &time);
+ return (spec_close(vp, fflag, cred, p));
+}
+
+#ifdef FIFO
+/*
+ * Read wrapper for fifo's
+ */
+ufsfifo_read(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+
+ /*
+ * Set access flag.
+ */
+ VTOI(vp)->i_flag |= IACC;
+ return (fifo_read(vp, uio, ioflag, cred));
+}
+
+/*
+ * Write wrapper for fifo's.
+ */
+ufsfifo_write(vp, uio, ioflag, cred)
+ struct vnode *vp;
+ struct uio *uio;
+ int ioflag;
+ struct ucred *cred;
+{
+
+ /*
+ * Set update and change flags.
+ */
+ VTOI(vp)->i_flag |= IUPD|ICHG;
+ return (fifo_write(vp, uio, ioflag, cred));
+}
+
+/*
+ * Close wrapper for fifo's.
+ *
+ * Update the times on the inode then do device close.
+ */
+ufsfifo_close(vp, fflag, cred, p)
+ struct vnode *vp;
+ int fflag;
+ struct ucred *cred;
+ struct proc *p;
+{
+ register struct inode *ip = VTOI(vp);
+
+ if (vp->v_usecount > 1 && !(ip->i_flag & ILOCKED))
+ ITIMES(ip, &time, &time);
+ return (fifo_close(vp, fflag, cred, p));
+}
+#endif /* FIFO */
+
+/*
+ * Allocate a new inode.
+ */
+maknode(mode, ndp, ipp)
+ int mode;
+ register struct nameidata *ndp;
+ struct inode **ipp;
+{
+ register struct inode *ip;
+ struct inode *tip;
+ register struct inode *pdir = VTOI(ndp->ni_dvp);
+ ino_t ipref;
+ int error;
+
+#ifdef DIANOSTIC
+ if ((ndp->ni_nameiop & HASBUF) == 0)
+ panic("maknode: no name");
+#endif
+ *ipp = 0;
+ if ((mode & IFMT) == 0)
+ mode |= IFREG;
+ if ((mode & IFMT) == IFDIR)
+ ipref = dirpref(pdir->i_fs);
+ else
+ ipref = pdir->i_number;
+ if (error = ialloc(pdir, ipref, mode, ndp->ni_cred, &tip)) {
+ free(ndp->ni_pnbuf, M_NAMEI);
+ iput(pdir);
+ return (error);
+ }
+ ip = tip;
+ ip->i_uid = ndp->ni_cred->cr_uid;
+ ip->i_gid = pdir->i_gid;
+#ifdef QUOTA
+ if ((error = getinoquota(ip)) ||
+ (error = chkiq(ip, 1, ndp->ni_cred, 0))) {
+ free(ndp->ni_pnbuf, M_NAMEI);
+ ifree(ip, ip->i_number, mode);
+ iput(ip);
+ iput(pdir);
+ return (error);
+ }
+#endif
+ ip->i_flag |= IACC|IUPD|ICHG;
+ ip->i_mode = mode;
+ ITOV(ip)->v_type = IFTOVT(mode); /* Rest init'd in iget() */
+ ip->i_nlink = 1;
+ if ((ip->i_mode & ISGID) && !groupmember(ip->i_gid, ndp->ni_cred) &&
+ suser(ndp->ni_cred, NULL))
+ ip->i_mode &= ~ISGID;
+
+ /*
+ * Make sure inode goes to disk before directory entry.
+ */
+ if (error = iupdat(ip, &time, &time, 1))
+ goto bad;
+ if (error = direnter(ip, ndp))
+ goto bad;
+ if ((ndp->ni_nameiop & SAVESTART) == 0)
+ FREE(ndp->ni_pnbuf, M_NAMEI);
+ iput(pdir);
+ *ipp = ip;
+ return (0);
+
+bad:
+ /*
+ * Write error occurred trying to update the inode
+ * or the directory so must deallocate the inode.
+ */
+ free(ndp->ni_pnbuf, M_NAMEI);
+ iput(pdir);
+ ip->i_nlink = 0;
+ ip->i_flag |= ICHG;
+ iput(ip);
+ return (error);
+}
+
+/*
+ * Advisory record locking support
+ */
+ufs_advlock(vp, id, op, fl, flags)
+ struct vnode *vp;
+ caddr_t id;
+ int op;
+ register struct flock *fl;
+ int flags;
+{
+ register struct inode *ip = VTOI(vp);
+ register struct lockf *lock;
+ off_t start, end;
+ int error;
+
+ /*
+ * Avoid the common case of unlocking when inode has no locks.
+ */
+ if (ip->i_lockf == (struct lockf *)0) {
+ if (op != F_SETLK) {
+ fl->l_type = F_UNLCK;
+ return (0);
+ }
+ }
+ /*
+ * Convert the flock structure into a start and end.
+ */
+ switch (fl->l_whence) {
+
+ case SEEK_SET:
+ case SEEK_CUR:
+ /*
+ * Caller is responsible for adding any necessary offset
+ * when SEEK_CUR is used.
+ */
+ start = fl->l_start;
+ break;
+
+ case SEEK_END:
+ start = ip->i_size + fl->l_start;
+ break;
+
+ default:
+ return (EINVAL);
+ }
+ if (start < 0)
+ return (EINVAL);
+ if (fl->l_len == 0)
+ end = -1;
+ else
+ end = start + fl->l_len - 1;
+ /*
+ * Create the lockf structure
+ */
+ MALLOC(lock, struct lockf *, sizeof *lock, M_LOCKF, M_WAITOK);
+ lock->lf_start = start;
+ lock->lf_end = end;
+ lock->lf_id = id;
+ lock->lf_inode = ip;
+ lock->lf_type = fl->l_type;
+ lock->lf_next = (struct lockf *)0;
+ lock->lf_block = (struct lockf *)0;
+ lock->lf_flags = flags;
+ /*
+ * Do the requested operation.
+ */
+ switch(op) {
+ case F_SETLK:
+ return (lf_setlock(lock));
+
+ case F_UNLCK:
+ error = lf_clearlock(lock);
+ FREE(lock, M_LOCKF);
+ return (error);
+
+ case F_GETLK:
+ error = lf_getlock(lock, fl);
+ FREE(lock, M_LOCKF);
+ return (error);
+
+ default:
+ free(lock, M_LOCKF);
+ return (EINVAL);
+ }
+ /* NOTREACHED */
+}
+
+/*
+ * Global vfs data structures for ufs
+ */
+struct vnodeops ufs_vnodeops = {
+ ufs_lookup, /* lookup */
+ ufs_create, /* create */
+ ufs_mknod, /* mknod */
+ ufs_open, /* open */
+ ufs_close, /* close */
+ ufs_access, /* access */
+ ufs_getattr, /* getattr */
+ ufs_setattr, /* setattr */
+ ufs_read, /* read */
+ ufs_write, /* write */
+ ufs_ioctl, /* ioctl */
+ ufs_select, /* select */
+ ufs_mmap, /* mmap */
+ ufs_fsync, /* fsync */
+ ufs_seek, /* seek */
+ ufs_remove, /* remove */
+ ufs_link, /* link */
+ ufs_rename, /* rename */
+ ufs_mkdir, /* mkdir */
+ ufs_rmdir, /* rmdir */
+ ufs_symlink, /* symlink */
+ ufs_readdir, /* readdir */
+ ufs_readlink, /* readlink */
+ ufs_abortop, /* abortop */
+ ufs_inactive, /* inactive */
+ ufs_reclaim, /* reclaim */
+ ufs_lock, /* lock */
+ ufs_unlock, /* unlock */
+ ufs_bmap, /* bmap */
+ ufs_strategy, /* strategy */
+ ufs_print, /* print */
+ ufs_islocked, /* islocked */
+ ufs_advlock, /* advlock */
+};
+
+struct vnodeops spec_inodeops = {
+ spec_lookup, /* lookup */
+ spec_create, /* create */
+ spec_mknod, /* mknod */
+ spec_open, /* open */
+ ufsspec_close, /* close */
+ ufs_access, /* access */
+ ufs_getattr, /* getattr */
+ ufs_setattr, /* setattr */
+ ufsspec_read, /* read */
+ ufsspec_write, /* write */
+ spec_ioctl, /* ioctl */
+ spec_select, /* select */
+ spec_mmap, /* mmap */
+ spec_fsync, /* fsync */
+ spec_seek, /* seek */
+ spec_remove, /* remove */
+ spec_link, /* link */
+ spec_rename, /* rename */
+ spec_mkdir, /* mkdir */
+ spec_rmdir, /* rmdir */
+ spec_symlink, /* symlink */
+ spec_readdir, /* readdir */
+ spec_readlink, /* readlink */
+ spec_abortop, /* abortop */
+ ufs_inactive, /* inactive */
+ ufs_reclaim, /* reclaim */
+ ufs_lock, /* lock */
+ ufs_unlock, /* unlock */
+ spec_bmap, /* bmap */
+ spec_strategy, /* strategy */
+ ufs_print, /* print */
+ ufs_islocked, /* islocked */
+ spec_advlock, /* advlock */
+};
+
+#ifdef FIFO
+struct vnodeops fifo_inodeops = {
+ fifo_lookup, /* lookup */
+ fifo_create, /* create */
+ fifo_mknod, /* mknod */
+ fifo_open, /* open */
+ ufsfifo_close, /* close */
+ ufs_access, /* access */
+ ufs_getattr, /* getattr */
+ ufs_setattr, /* setattr */
+ ufsfifo_read, /* read */
+ ufsfifo_write, /* write */
+ fifo_ioctl, /* ioctl */
+ fifo_select, /* select */
+ fifo_mmap, /* mmap */
+ fifo_fsync, /* fsync */
+ fifo_seek, /* seek */
+ fifo_remove, /* remove */
+ fifo_link, /* link */
+ fifo_rename, /* rename */
+ fifo_mkdir, /* mkdir */
+ fifo_rmdir, /* rmdir */
+ fifo_symlink, /* symlink */
+ fifo_readdir, /* readdir */
+ fifo_readlink, /* readlink */
+ fifo_abortop, /* abortop */
+ ufs_inactive, /* inactive */
+ ufs_reclaim, /* reclaim */
+ ufs_lock, /* lock */
+ ufs_unlock, /* unlock */
+ fifo_bmap, /* bmap */
+ fifo_strategy, /* strategy */
+ ufs_print, /* print */
+ ufs_islocked, /* islocked */
+ fifo_advlock, /* advlock */
+};
+#endif /* FIFO */
+
+enum vtype iftovt_tab[16] = {
+ VNON, VFIFO, VCHR, VNON, VDIR, VNON, VBLK, VNON,
+ VREG, VNON, VLNK, VNON, VSOCK, VNON, VNON, VBAD,
+};
+int vttoif_tab[9] = {
+ 0, IFREG, IFDIR, IFBLK, IFCHR, IFLNK, IFSOCK, IFIFO, IFMT,
+};
projects / unix-history / commitdiff