827 lines
17 KiB
C
827 lines
17 KiB
C
/*
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* $Id: isofs_vnops.c,v 1.9 1993/10/28 17:38:50 ws Exp $
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*/
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#include "param.h"
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#include "systm.h"
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#include "namei.h"
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#include "resourcevar.h"
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#include "kernel.h"
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#include "file.h"
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#include "stat.h"
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#include "buf.h"
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#include "proc.h"
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#include "conf.h"
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#include "mount.h"
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#include "vnode.h"
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#include "specdev.h"
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#include "fifo.h"
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#include "malloc.h"
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#include "dir.h"
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#include "iso.h"
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#include "isofs_node.h"
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#include "iso_rrip.h"
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/*
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* Mknod vnode call
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* Actually remap the device number
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*/
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/* ARGSUSED */
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isofs_mknod(ndp, vap, cred, p)
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struct nameidata *ndp;
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struct ucred *cred;
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struct vattr *vap;
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struct proc *p;
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{
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#ifndef ISODEVMAP
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free(ndp->ni_pnbuf, M_NAMEI);
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vput(ndp->ni_dvp);
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vput(ndp->ni_vp);
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return EINVAL;
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#else
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register struct vnode *vp;
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struct iso_node *ip;
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struct iso_dnode *dp;
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int error;
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vp = ndp->ni_vp;
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ip = VTOI(vp);
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if (ip->i_mnt->iso_ftype != ISO_FTYPE_RRIP
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|| vap->va_type != vp->v_type
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|| (vap->va_type != VCHR && vap->va_type != VBLK)) {
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free(ndp->ni_pnbuf, M_NAMEI);
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vput(ndp->ni_dvp);
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vput(ndp->ni_vp);
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return EINVAL;
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}
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dp = iso_dmap(ip->i_dev,ip->i_number,1);
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if (ip->inode.iso_rdev == vap->va_rdev || vap->va_rdev == VNOVAL) {
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/* same as the unmapped one, delete the mapping */
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remque(dp);
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FREE(dp,M_CACHE);
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} else
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/* enter new mapping */
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dp->d_dev = vap->va_rdev;
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/*
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* Remove inode so that it will be reloaded by iget and
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* checked to see if it is an alias of an existing entry
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* in the inode cache.
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*/
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vput(vp);
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vp->v_type = VNON;
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vgone(vp);
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return (0);
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#endif
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}
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/*
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* Open called.
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*
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* Nothing to do.
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*/
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/* ARGSUSED */
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isofs_open(vp, mode, cred, p)
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struct vnode *vp;
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int mode;
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struct ucred *cred;
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struct proc *p;
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{
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return (0);
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}
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/*
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* Close called
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*
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* Update the times on the inode on writeable file systems.
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*/
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/* ARGSUSED */
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isofs_close(vp, fflag, cred, p)
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struct vnode *vp;
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int fflag;
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struct ucred *cred;
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struct proc *p;
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{
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return (0);
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}
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/*
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* Check mode permission on inode pointer. Mode is READ, WRITE or EXEC.
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* The mode is shifted to select the owner/group/other fields. The
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* super user is granted all permissions.
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*/
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isofs_access(vp, mode, cred, p)
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struct vnode *vp;
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register int mode;
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struct ucred *cred;
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struct proc *p;
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{
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return (0);
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}
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/* ARGSUSED */
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isofs_getattr(vp, vap, cred, p)
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struct vnode *vp;
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register struct vattr *vap;
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struct ucred *cred;
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struct proc *p;
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{
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register struct iso_node *ip = VTOI(vp);
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int i;
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vap->va_fsid = ip->i_dev;
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vap->va_fileid = ip->i_number;
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vap->va_mode = ip->inode.iso_mode;
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vap->va_nlink = ip->inode.iso_links;
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vap->va_uid = ip->inode.iso_uid;
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vap->va_gid = ip->inode.iso_gid;
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vap->va_atime = ip->inode.iso_atime;
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vap->va_mtime = ip->inode.iso_mtime;
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vap->va_ctime = ip->inode.iso_ctime;
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vap->va_rdev = ip->inode.iso_rdev;
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vap->va_size = ip->i_size;
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vap->va_size_rsv = 0;
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vap->va_flags = 0;
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vap->va_gen = 1;
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vap->va_blocksize = ip->i_mnt->logical_block_size;
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vap->va_bytes = ip->i_size;
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vap->va_bytes_rsv = 0;
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vap->va_type = vp->v_type;
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return (0);
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}
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/*
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* Vnode op for reading.
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*/
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/* ARGSUSED */
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isofs_read(vp, uio, ioflag, cred)
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struct vnode *vp;
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register struct uio *uio;
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int ioflag;
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struct ucred *cred;
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{
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register struct iso_node *ip = VTOI(vp);
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register struct iso_mnt *imp;
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struct buf *bp;
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daddr_t lbn, bn, rablock;
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int size, diff, error = 0;
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long n, on, type;
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if (uio->uio_resid == 0)
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return (0);
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if (uio->uio_offset < 0)
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return (EINVAL);
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ip->i_flag |= IACC;
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imp = ip->i_mnt;
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do {
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lbn = iso_lblkno(imp, uio->uio_offset);
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on = iso_blkoff(imp, uio->uio_offset);
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n = MIN((unsigned)(imp->logical_block_size - on), uio->uio_resid);
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diff = ip->i_size - uio->uio_offset;
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if (diff <= 0)
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return (0);
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if (diff < n)
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n = diff;
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size = iso_blksize(imp, ip, lbn);
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rablock = lbn + 1;
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if (vp->v_lastr + 1 == lbn &&
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iso_lblktosize(imp, rablock) < ip->i_size)
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error = breada(ITOV(ip), lbn, size, rablock,
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iso_blksize(imp, ip, rablock), NOCRED, &bp);
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else
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error = bread(ITOV(ip), lbn, size, NOCRED, &bp);
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vp->v_lastr = lbn;
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n = MIN(n, size - bp->b_resid);
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if (error) {
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brelse(bp);
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return (error);
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}
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error = uiomove(bp->b_un.b_addr + on, (int)n, uio);
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if (n + on == imp->logical_block_size || uio->uio_offset == ip->i_size)
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bp->b_flags |= B_AGE;
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brelse(bp);
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} while (error == 0 && uio->uio_resid > 0 && n != 0);
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return (error);
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}
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/* ARGSUSED */
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isofs_ioctl(vp, com, data, fflag, cred, p)
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struct vnode *vp;
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int com;
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caddr_t data;
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int fflag;
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struct ucred *cred;
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struct proc *p;
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{
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printf("You did ioctl for isofs !!\n");
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return (ENOTTY);
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}
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/* ARGSUSED */
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isofs_select(vp, which, fflags, cred, p)
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struct vnode *vp;
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int which, fflags;
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struct ucred *cred;
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struct proc *p;
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{
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/*
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* We should really check to see if I/O is possible.
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*/
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return (1);
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}
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/*
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* Mmap a file
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*
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* NB Currently unsupported.
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*/
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/* ARGSUSED */
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isofs_mmap(vp, fflags, cred, p)
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struct vnode *vp;
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int fflags;
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struct ucred *cred;
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struct proc *p;
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{
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return (EINVAL);
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}
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/*
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* Seek on a file
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*
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* Nothing to do, so just return.
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*/
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/* ARGSUSED */
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isofs_seek(vp, oldoff, newoff, cred)
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struct vnode *vp;
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off_t oldoff, newoff;
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struct ucred *cred;
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{
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return (0);
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}
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/*
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* Structure for reading directories
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*/
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struct isoreaddir {
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struct dirent saveent;
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struct dirent assocent;
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struct dirent current;
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off_t saveoff;
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off_t assocoff;
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off_t curroff;
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struct uio *uio;
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off_t uio_off;
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u_int *cookiep;
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int ncookies;
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int eof;
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};
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static int
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iso_uiodir(idp,dp)
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struct isoreaddir *idp;
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struct dirent *dp;
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{
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int error;
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dp->d_name[dp->d_namlen] = 0;
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dp->d_reclen = DIRSIZ(dp);
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if (idp->uio->uio_resid < dp->d_reclen) {
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idp->eof = 0;
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return -1;
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}
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if (idp->cookiep) {
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if (idp->ncookies <= 0) {
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idp->eof = 0;
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return -1;
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}
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*idp->cookiep++ = idp->curroff;
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--idp->ncookies;
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}
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if (error = uiomove(dp,dp->d_reclen,idp->uio))
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return error;
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idp->uio_off = idp->curroff;
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return 0;
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}
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static int
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iso_shipdir(idp)
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struct isoreaddir *idp;
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{
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struct dirent *dp;
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int cl, sl, assoc;
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int error;
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char *cname, *sname;
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cl = idp->current.d_namlen;
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cname = idp->current.d_name;
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if (assoc = cl > 1 && *cname == ASSOCCHAR) {
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cl--;
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cname++;
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}
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dp = &idp->saveent;
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sname = dp->d_name;
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if (!(sl = dp->d_namlen)) {
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dp = &idp->assocent;
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sname = dp->d_name + 1;
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sl = dp->d_namlen - 1;
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}
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if (sl > 0) {
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if (sl != cl
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|| bcmp(sname,cname,sl)) {
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if (idp->assocent.d_namlen) {
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if (error = iso_uiodir(idp,&idp->assocent,idp->assocoff))
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return error;
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idp->uio_off = idp->assocoff;
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idp->assocent.d_namlen = 0;
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}
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if (idp->saveent.d_namlen) {
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if (error = iso_uiodir(idp,&idp->saveent,idp->saveoff))
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return error;
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idp->uio_off = idp->saveoff;
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idp->saveent.d_namlen = 0;
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}
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}
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}
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idp->current.d_reclen = DIRSIZ(&idp->current);
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if (assoc) {
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idp->assocoff = idp->curroff;
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bcopy(&idp->current,&idp->assocent,idp->current.d_reclen);
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} else {
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idp->saveoff = idp->curroff;
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bcopy(&idp->current,&idp->saveent,idp->current.d_reclen);
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}
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return 0;
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}
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/*
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* Vnode op for readdir
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*/
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isofs_readdir(vp, uio, cred, eofflagp, cookies, ncookies)
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struct vnode *vp;
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register struct uio *uio;
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struct ucred *cred;
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int *eofflagp;
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u_int *cookies;
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int ncookies;
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{
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struct isoreaddir *idp;
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int entryoffsetinblock;
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int error = 0;
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int endsearch;
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struct iso_directory_record *ep;
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int reclen;
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struct iso_mnt *imp;
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struct iso_node *ip;
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struct buf *bp = NULL;
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ip = VTOI (vp);
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imp = ip->i_mnt;
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MALLOC(idp,struct isoreaddir *,sizeof(*idp),M_TEMP,M_WAITOK);
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idp->saveent.d_namlen = 0;
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idp->assocent.d_namlen = 0;
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idp->uio = uio;
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idp->cookiep = cookies;
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idp->ncookies = ncookies;
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idp->curroff = uio->uio_offset;
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idp->eof = 1;
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entryoffsetinblock = iso_blkoff(imp, idp->curroff);
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if (entryoffsetinblock != 0) {
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if (error = iso_blkatoff(ip, idp->curroff, &bp)) {
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FREE(idp,M_TEMP);
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return (error);
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}
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}
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endsearch = ip->i_size;
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while (idp->curroff < endsearch) {
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/*
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* If offset is on a block boundary,
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* read the next directory block.
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* Release previous if it exists.
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*/
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if (iso_blkoff(imp, idp->curroff) == 0) {
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if (bp != NULL)
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brelse(bp);
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if (error = iso_blkatoff(ip, idp->curroff, &bp))
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break;
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entryoffsetinblock = 0;
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}
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/*
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* Get pointer to next entry.
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*/
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ep = (struct iso_directory_record *)
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(bp->b_un.b_addr + entryoffsetinblock);
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reclen = isonum_711 (ep->length);
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if (reclen == 0) {
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/* skip to next block, if any */
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idp->curroff = roundup (idp->curroff,
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imp->logical_block_size);
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continue;
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}
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|
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if (reclen < ISO_DIRECTORY_RECORD_SIZE) {
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error = EINVAL;
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/* illegal entry, stop */
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break;
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}
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|
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if (entryoffsetinblock + reclen >= imp->logical_block_size) {
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error = EINVAL;
|
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/* illegal directory, so stop looking */
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break;
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}
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|
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idp->current.d_namlen = isonum_711 (ep->name_len);
|
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if (isonum_711(ep->flags)&2)
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isodirino(&idp->current.d_fileno,ep,imp);
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else
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idp->current.d_fileno = (bp->b_blkno << DEV_BSHIFT) + idp->curroff;
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|
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if (reclen < ISO_DIRECTORY_RECORD_SIZE + idp->current.d_namlen) {
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error = EINVAL;
|
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/* illegal entry, stop */
|
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break;
|
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}
|
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|
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idp->curroff += reclen;
|
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/*
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*
|
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*/
|
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switch (imp->iso_ftype) {
|
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case ISO_FTYPE_RRIP:
|
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isofs_rrip_getname(ep,idp->current.d_name,
|
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&idp->current.d_namlen,
|
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&idp->current.d_fileno,imp);
|
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if (idp->current.d_namlen)
|
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error = iso_uiodir(idp,&idp->current);
|
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break;
|
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default: /* ISO_FTYPE_DEFAULT || ISO_FTYPE_9660 */
|
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strcpy(idp->current.d_name,"..");
|
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switch (ep->name[0]) {
|
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case 0:
|
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idp->current.d_namlen = 1;
|
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error = iso_uiodir(idp,&idp->current);
|
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break;
|
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case 1:
|
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idp->current.d_namlen = 2;
|
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error = iso_uiodir(idp,&idp->current);
|
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break;
|
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default:
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isofntrans(ep->name,idp->current.d_namlen,
|
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idp->current.d_name,&idp->current.d_namlen,
|
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imp->iso_ftype == ISO_FTYPE_9660,
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isonum_711(ep->flags)&4);
|
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if (imp->iso_ftype == ISO_FTYPE_DEFAULT)
|
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error = iso_shipdir(idp);
|
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else
|
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error = iso_uiodir(idp,&idp->current);
|
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break;
|
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}
|
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}
|
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if (error)
|
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break;
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|
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entryoffsetinblock += reclen;
|
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}
|
|
|
|
if (!error && imp->iso_ftype == ISO_FTYPE_DEFAULT) {
|
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idp->current.d_namlen = 0;
|
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error = iso_shipdir(idp);
|
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}
|
|
if (error < 0)
|
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error = 0;
|
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|
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if (bp)
|
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brelse (bp);
|
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|
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uio->uio_offset = idp->uio_off;
|
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*eofflagp = idp->eof;
|
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|
|
FREE(idp,M_TEMP);
|
|
|
|
return (error);
|
|
}
|
|
|
|
/*
|
|
* Return target name of a symbolic link
|
|
* Shouldn't we get the parent vnode and read the data from there?
|
|
* This could eventually result in deadlocks in isofs_lookup.
|
|
* But otherwise the block read here is in the block buffer two times.
|
|
*/
|
|
typedef struct iso_directory_record ISODIR;
|
|
typedef struct iso_node ISONODE;
|
|
typedef struct iso_mnt ISOMNT;
|
|
int isofs_readlink(vp, uio, cred)
|
|
struct vnode *vp;
|
|
struct uio *uio;
|
|
struct ucred *cred;
|
|
{
|
|
ISONODE *ip;
|
|
ISODIR *dirp;
|
|
ISOMNT *imp;
|
|
struct buf *bp;
|
|
u_short symlen;
|
|
int error;
|
|
char *symname;
|
|
ino_t ino;
|
|
|
|
ip = VTOI(vp);
|
|
imp = ip->i_mnt;
|
|
|
|
if (imp->iso_ftype != ISO_FTYPE_RRIP)
|
|
return EINVAL;
|
|
|
|
/*
|
|
* Get parents directory record block that this inode included.
|
|
*/
|
|
error = bread(imp->im_devvp,
|
|
(daddr_t)(ip->i_number / DEV_BSIZE),
|
|
imp->logical_block_size,
|
|
NOCRED,
|
|
&bp);
|
|
if (error) {
|
|
brelse(bp);
|
|
return EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Setup the directory pointer for this inode
|
|
*/
|
|
dirp = (ISODIR *)(bp->b_un.b_addr + (ip->i_number & imp->im_bmask));
|
|
#ifdef DEBUG
|
|
printf("lbn=%d,off=%d,bsize=%d,DEV_BSIZE=%d, dirp= %08x, b_addr=%08x, offset=%08x(%08x)\n",
|
|
(daddr_t)(ip->i_number >> imp->im_bshift),
|
|
ip->i_number & imp->im_bmask,
|
|
imp->logical_block_size,
|
|
DEV_BSIZE,
|
|
dirp,
|
|
bp->b_un.b_addr,
|
|
ip->i_number,
|
|
ip->i_number & imp->im_bmask );
|
|
#endif
|
|
|
|
/*
|
|
* Just make sure, we have a right one....
|
|
* 1: Check not cross boundary on block
|
|
*/
|
|
if ((ip->i_number & imp->im_bmask) + isonum_711(dirp->length)
|
|
>= imp->logical_block_size) {
|
|
brelse(bp);
|
|
return EINVAL;
|
|
}
|
|
|
|
/*
|
|
* Now get a buffer
|
|
* Abuse a namei buffer for now.
|
|
*/
|
|
MALLOC(symname,char *,MAXPATHLEN,M_NAMEI,M_WAITOK);
|
|
|
|
/*
|
|
* Ok, we just gathering a symbolic name in SL record.
|
|
*/
|
|
if (isofs_rrip_getsymname(dirp,symname,&symlen,imp) == 0) {
|
|
FREE(symname,M_NAMEI);
|
|
brelse(bp);
|
|
return EINVAL;
|
|
}
|
|
/*
|
|
* Don't forget before you leave from home ;-)
|
|
*/
|
|
brelse(bp);
|
|
|
|
/*
|
|
* return with the symbolic name to caller's.
|
|
*/
|
|
error = uiomove(symname,symlen,uio);
|
|
|
|
FREE(symname,M_NAMEI);
|
|
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* 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 */
|
|
isofs_abortop(ndp)
|
|
struct nameidata *ndp;
|
|
{
|
|
|
|
if ((ndp->ni_nameiop & (HASBUF | SAVESTART)) == HASBUF)
|
|
FREE(ndp->ni_pnbuf, M_NAMEI);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Lock an inode.
|
|
*/
|
|
isofs_lock(vp)
|
|
struct vnode *vp;
|
|
{
|
|
register struct iso_node *ip = VTOI(vp);
|
|
|
|
ISO_ILOCK(ip);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Unlock an inode.
|
|
*/
|
|
isofs_unlock(vp)
|
|
struct vnode *vp;
|
|
{
|
|
register struct iso_node *ip = VTOI(vp);
|
|
|
|
if (!(ip->i_flag & ILOCKED))
|
|
panic("isofs_unlock NOT LOCKED");
|
|
ISO_IUNLOCK(ip);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Check for a locked inode.
|
|
*/
|
|
isofs_islocked(vp)
|
|
struct vnode *vp;
|
|
{
|
|
|
|
if (VTOI(vp)->i_flag & ILOCKED)
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Calculate the logical to physical mapping if not done already,
|
|
* then call the device strategy routine.
|
|
*/
|
|
|
|
isofs_strategy(bp)
|
|
register struct buf *bp;
|
|
{
|
|
register struct iso_node *ip = VTOI(bp->b_vp);
|
|
struct vnode *vp;
|
|
int error;
|
|
|
|
if (bp->b_vp->v_type == VBLK || bp->b_vp->v_type == VCHR)
|
|
panic("isofs_strategy: spec");
|
|
if (bp->b_blkno == bp->b_lblkno) {
|
|
if (error = iso_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;
|
|
}
|
|
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.
|
|
*/
|
|
void
|
|
isofs_print(vp)
|
|
struct vnode *vp;
|
|
{
|
|
printf("tag VT_ISOFS, isofs vnode\n");
|
|
}
|
|
|
|
extern int enodev ();
|
|
|
|
/*
|
|
* Global vfs data structures for isofs
|
|
*/
|
|
struct vnodeops isofs_vnodeops = {
|
|
isofs_lookup, /* lookup */
|
|
(void *)enodev, /* create */
|
|
(void *)enodev, /* mknod */
|
|
isofs_open, /* open */
|
|
isofs_close, /* close */
|
|
isofs_access, /* access */
|
|
isofs_getattr, /* getattr */
|
|
(void *)enodev, /* setattr */
|
|
isofs_read, /* read */
|
|
(void *)enodev, /* write */
|
|
isofs_ioctl, /* ioctl */
|
|
isofs_select, /* select */
|
|
isofs_mmap, /* mmap */
|
|
(void *)nullop, /* fsync */
|
|
isofs_seek, /* seek */
|
|
(void *)enodev, /* remove */
|
|
(void *)enodev, /* link */
|
|
(void *)enodev, /* rename */
|
|
(void *)enodev, /* mkdir */
|
|
(void *)enodev, /* rmdir */
|
|
(void *)enodev, /* symlink */
|
|
isofs_readdir, /* readdir */
|
|
isofs_readlink, /* readlink */
|
|
isofs_abortop, /* abortop */
|
|
isofs_inactive, /* inactive */
|
|
isofs_reclaim, /* reclaim */
|
|
isofs_lock, /* lock */
|
|
isofs_unlock, /* unlock */
|
|
(void *)enodev, /* bmap */
|
|
isofs_strategy, /* strategy */
|
|
isofs_print, /* print */
|
|
isofs_islocked, /* islocked */
|
|
(void *)enodev, /* advlock */
|
|
};
|
|
|
|
struct vnodeops isofs_spec_inodeops = {
|
|
spec_lookup, /* lookup */
|
|
(void *)enodev, /* create */
|
|
(void *)enodev, /* mknod */
|
|
spec_open, /* open */
|
|
spec_close, /* close */
|
|
isofs_access, /* access */
|
|
isofs_getattr, /* getattr */
|
|
(void *)enodev, /* setattr */
|
|
spec_read, /* read */
|
|
spec_write, /* write */
|
|
spec_ioctl, /* ioctl */
|
|
spec_select, /* select */
|
|
spec_mmap, /* mmap */
|
|
spec_fsync, /* fsync */
|
|
spec_seek, /* seek */
|
|
(void *)enodev, /* remove */
|
|
(void *)enodev, /* link */
|
|
(void *)enodev, /* rename */
|
|
(void *)enodev, /* mkdir */
|
|
(void *)enodev, /* rmdir */
|
|
(void *)enodev, /* symlink */
|
|
spec_readdir, /* readdir */
|
|
spec_readlink, /* readlink */
|
|
spec_abortop, /* abortop */
|
|
isofs_inactive, /* inactive */
|
|
isofs_reclaim, /* reclaim */
|
|
isofs_lock, /* lock */
|
|
isofs_unlock, /* unlock */
|
|
(void *)enodev, /* bmap */
|
|
spec_strategy, /* strategy */
|
|
isofs_print, /* print */
|
|
isofs_islocked, /* islocked */
|
|
spec_advlock, /* advlock */
|
|
};
|
|
|
|
#ifdef FIFO
|
|
struct vnodeops isofs_fifo_inodeops = {
|
|
fifo_lookup, /* lookup */
|
|
(void *)enodev, /* create */
|
|
(void *)enodev, /* mknod */
|
|
fifo_open, /* open */
|
|
fifo_close, /* close */
|
|
isofs_access, /* access */
|
|
isofs_getattr, /* getattr */
|
|
(void *)enodev, /* setattr */
|
|
fifo_read, /* read */
|
|
fifo_write, /* write */
|
|
fifo_ioctl, /* ioctl */
|
|
fifo_select, /* select */
|
|
fifo_mmap, /* mmap */
|
|
fifo_fsync, /* fsync */
|
|
fifo_seek, /* seek */
|
|
(void *)enodev, /* remove */
|
|
(void *)enodev, /* link */
|
|
(void *)enodev, /* rename */
|
|
(void *)enodev, /* mkdir */
|
|
(void *)enodev, /* rmdir */
|
|
(void *)enodev, /* symlink */
|
|
fifo_readdir, /* readdir */
|
|
fifo_readlink, /* readlink */
|
|
fifo_abortop, /* abortop */
|
|
isofs_inactive, /* inactive */
|
|
isofs_reclaim, /* reclaim */
|
|
isofs_lock, /* lock */
|
|
isofs_unlock, /* unlock */
|
|
(void *)enodev, /* bmap */
|
|
fifo_strategy, /* strategy */
|
|
isofs_print, /* print */
|
|
isofs_islocked, /* islocked */
|
|
fifo_advlock, /* advlock */
|
|
};
|
|
#endif /* FIFO */
|