+#include "param.h"
+#include "systm.h"
+#include "namei.h"
+#include "proc.h"
+#include "kernel.h"
+#include "vnode.h"
+#include "specdev.h"
+#include "mount.h"
+#include "buf.h"
+#include "file.h"
+#include "dkbad.h"
+#include "disklabel.h"
+#include "ioctl.h"
+#include "errno.h"
+#include "malloc.h"
+
+#include "iso.h"
+#include "isofs_node.h"
+
+extern int enodev ();
+
+struct vfsops isofs_vfsops = {
+ isofs_mount,
+ isofs_start,
+ isofs_unmount,
+ isofs_root,
+ (void *)enodev, /* quotactl */
+ isofs_statfs,
+ isofs_sync,
+ isofs_fhtovp,
+ isofs_vptofh,
+ isofs_init
+};
+
+/*
+ * Called by vfs_mountroot when ufs is going to be mounted as root.
+ *
+ * Name is updated by mount(8) after booting.
+ */
+#define ROOTNAME "root_device"
+
+isofs_mountroot()
+{
+ register struct mount *mp;
+ extern struct vnode *rootvp;
+ struct proc *p = curproc; /* XXX */
+ struct iso_mnt *imp;
+ register struct fs *fs;
+ u_int size;
+ int error;
+
+ mp = (struct mount *)malloc((u_long)sizeof(struct mount),
+ M_MOUNT, M_WAITOK);
+ mp->mnt_op = &isofs_vfsops;
+ mp->mnt_flag = MNT_RDONLY;
+ mp->mnt_exroot = 0;
+ mp->mnt_mounth = NULLVP;
+ error = iso_mountfs(rootvp, mp, p);
+ if (error) {
+ free((caddr_t)mp, M_MOUNT);
+ return (error);
+ }
+ if (error = vfs_lock(mp)) {
+ (void)isofs_unmount(mp, 0, p);
+ free((caddr_t)mp, M_MOUNT);
+ return (error);
+ }
+ rootfs = mp;
+ mp->mnt_next = mp;
+ mp->mnt_prev = mp;
+ mp->mnt_vnodecovered = NULLVP;
+ imp = VFSTOISOFS(mp);
+ bzero(imp->im_fsmnt, sizeof(imp->im_fsmnt));
+ imp->im_fsmnt[0] = '/';
+ bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
+ MNAMELEN);
+ (void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
+ &size);
+ bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
+ (void) isofs_statfs(mp, &mp->mnt_stat, p);
+ vfs_unlock(mp);
+ return (0);
+}
+
+/*
+ * Flag to allow forcible unmounting.
+ */
+int iso_doforce = 1;
+
+/*
+ * VFS Operations.
+ *
+ * mount system call
+ */
+isofs_mount(mp, path, data, ndp, p)
+ register struct mount *mp;
+ char *path;
+ caddr_t data;
+ struct nameidata *ndp;
+ struct proc *p;
+{
+ struct vnode *devvp;
+ struct ufs_args args;
+ u_int size;
+ int error;
+ struct iso_mnt *imp;
+
+ if (error = copyin(data, (caddr_t)&args, sizeof (struct ufs_args)))
+ return (error);
+
+ if ((mp->mnt_flag & MNT_RDONLY) == 0)
+ return (EROFS);
+
+ /*
+ * Process export requests.
+ */
+ if ((args.exflags & MNT_EXPORTED) || (mp->mnt_flag & MNT_EXPORTED)) {
+ if (args.exflags & MNT_EXPORTED)
+ mp->mnt_flag |= MNT_EXPORTED;
+ else
+ mp->mnt_flag &= ~MNT_EXPORTED;
+ if (args.exflags & MNT_EXRDONLY)
+ mp->mnt_flag |= MNT_EXRDONLY;
+ else
+ mp->mnt_flag &= ~MNT_EXRDONLY;
+ mp->mnt_exroot = args.exroot;
+ }
+ /*
+ * If updating, check whether changing from read-only to
+ * read/write; if there is no device name, that's all we do.
+ */
+ if (mp->mnt_flag & MNT_UPDATE) {
+ imp = VFSTOISOFS(mp);
+ if (args.fspec == 0)
+ return (0);
+ }
+ /*
+ * Not an update, or updating the name: look up the name
+ * and verify that it refers to a sensible block device.
+ */
+ ndp->ni_nameiop = LOOKUP | FOLLOW;
+ ndp->ni_segflg = UIO_USERSPACE;
+ ndp->ni_dirp = args.fspec;
+ if (error = namei(ndp, p))
+ return (error);
+ devvp = ndp->ni_vp;
+ if (devvp->v_type != VBLK) {
+ vrele(devvp);
+ return (ENOTBLK);
+ }
+ if (major(devvp->v_rdev) >= nblkdev) {
+ vrele(devvp);
+ return (ENXIO);
+ }
+
+ if ((mp->mnt_flag & MNT_UPDATE) == 0)
+ error = iso_mountfs(devvp, mp, p);
+ else {
+ if (devvp != imp->im_devvp)
+ error = EINVAL; /* needs translation */
+ else
+ vrele(devvp);
+ }
+ if (error) {
+ vrele(devvp);
+ return (error);
+ }
+ imp = VFSTOISOFS(mp);
+ (void) copyinstr(path, imp->im_fsmnt, sizeof(imp->im_fsmnt)-1, &size);
+ bzero(imp->im_fsmnt + size, sizeof(imp->im_fsmnt) - size);
+ bcopy((caddr_t)imp->im_fsmnt, (caddr_t)mp->mnt_stat.f_mntonname,
+ MNAMELEN);
+ (void) copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
+ &size);
+ bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
+ (void) isofs_statfs(mp, &mp->mnt_stat, p);
+ return (0);
+}
+
+/*
+ * Common code for mount and mountroot
+ */
+iso_mountfs(devvp, mp, p)
+ register struct vnode *devvp;
+ struct mount *mp;
+ struct proc *p;
+{
+ register struct iso_mnt *isomp = (struct iso_mnt *)0;
+ struct buf *bp = NULL;
+ dev_t dev = devvp->v_rdev;
+ caddr_t base, space;
+ int havepart = 0, blks;
+ int error = EINVAL, i, size;
+ int needclose = 0;
+ int ronly = (mp->mnt_flag & MNT_RDONLY) != 0;
+ extern struct vnode *rootvp;
+ int j;
+ int iso_bsize;
+ int iso_blknum;
+ struct iso_volume_descriptor *vdp;
+ struct iso_primary_descriptor *pri;
+ struct iso_directory_record *rootp;
+ int logical_block_size;
+
+ if (!ronly)
+ return (EROFS);
+
+ /*
+ * Disallow multiple mounts of the same device.
+ * Disallow mounting of a device that is currently in use
+ * (except for root, which might share swap device for miniroot).
+ * Flush out any old buffers remaining from a previous use.
+ */
+ if (error = iso_mountedon(devvp))
+ return (error);
+ if (vcount(devvp) > 1 && devvp != rootvp)
+ return (EBUSY);
+ vinvalbuf(devvp, 1);
+ if (error = VOP_OPEN(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p))
+ return (error);
+ needclose = 1;
+
+ /* This is the "logical sector size". The standard says this
+ * should be 2048 or the physical sector size on the device,
+ * whichever is greater. For now, we'll just use a constant.
+ */
+ iso_bsize = 2048;
+
+ for (iso_blknum = 16; iso_blknum < 100; iso_blknum++) {
+ if (error = bread (devvp, iso_blknum * iso_bsize / DEV_BSIZE,
+ iso_bsize, NOCRED, &bp))
+ goto out;
+
+ vdp = (struct iso_volume_descriptor *)bp->b_un.b_addr;
+ if (bcmp (vdp->id, ISO_STANDARD_ID, sizeof vdp->id) != 0) {
+ error = EINVAL;
+ goto out;
+ }
+
+ if (isonum_711 (vdp->type) == ISO_VD_END) {
+ error = EINVAL;
+ goto out;
+ }
+
+ if (isonum_711 (vdp->type) == ISO_VD_PRIMARY)
+ break;
+ brelse(bp);
+ }
+
+ if (isonum_711 (vdp->type) != ISO_VD_PRIMARY) {
+ error = EINVAL;
+ goto out;
+ }
+
+ pri = (struct iso_primary_descriptor *)vdp;
+
+ logical_block_size = isonum_723 (pri->logical_block_size);
+
+ if (logical_block_size < DEV_BSIZE
+ || logical_block_size >= MAXBSIZE
+ || (logical_block_size & (logical_block_size - 1)) != 0) {
+ error = EINVAL;
+ goto out;
+ }
+
+ rootp = (struct iso_directory_record *)pri->root_directory_record;
+
+ isomp = (struct iso_mnt *)malloc(sizeof *isomp,M_UFSMNT,M_WAITOK);
+ isomp->logical_block_size = logical_block_size;
+ isomp->volume_space_size = isonum_733 (pri->volume_space_size);
+ bcopy (rootp, isomp->root, sizeof isomp->root);
+ isomp->root_extent = isonum_733 (rootp->extent);
+ isomp->root_size = isonum_733 (rootp->size);
+
+ isomp->im_bsize = logical_block_size;
+ isomp->im_bmask = ~(isomp->im_bsize - 1);
+ isomp->im_bshift = 0;
+ while ((1 << isomp->im_bshift) < isomp->im_bsize)
+ isomp->im_bshift++;
+
+ bp->b_flags |= B_INVAL;
+ brelse(bp);
+ bp = NULL;
+
+ isomp->im_ronly = ronly;
+ if (ronly == 0)
+ isomp->im_fmod = 1;
+
+ mp->mnt_data = (qaddr_t)isomp;
+ mp->mnt_stat.f_fsid.val[0] = (long)dev;
+ mp->mnt_stat.f_fsid.val[1] = MOUNT_ISOFS;
+ mp->mnt_flag |= MNT_LOCAL;
+ isomp->im_mountp = mp;
+ isomp->im_dev = dev;
+ isomp->im_devvp = devvp;
+
+ devvp->v_specflags |= SI_MOUNTEDON;
+
+ return (0);
+out:
+ if (bp)
+ brelse(bp);
+ if (needclose)
+ (void)VOP_CLOSE(devvp, ronly ? FREAD : FREAD|FWRITE, NOCRED, p);
+ if (isomp) {
+ free((caddr_t)isomp, M_UFSMNT);
+ mp->mnt_data = (qaddr_t)0;
+ }
+ return (error);
+}
+
+/*
+ * Make a filesystem operational.
+ * Nothing to do at the moment.
+ */
+/* ARGSUSED */
+isofs_start(mp, flags, p)
+ struct mount *mp;
+ int flags;
+ struct proc *p;
+{
+
+ return (0);
+}
+
+/*
+ * unmount system call
+ */
+isofs_unmount(mp, mntflags, p)
+ struct mount *mp;
+ int mntflags;
+ struct proc *p;
+{
+ register struct iso_mnt *isomp;
+ int i, error, ronly, flags = 0;
+
+ if (mntflags & MNT_FORCE) {
+ if (!iso_doforce || mp == rootfs)
+ return (EINVAL);
+ flags |= FORCECLOSE;
+ }
+ mntflushbuf(mp, 0);
+ if (mntinvalbuf(mp))
+ return (EBUSY);
+ isomp = VFSTOISOFS(mp);
+
+ if (error = vflush(mp, NULLVP, flags))
+ return (error);
+ ronly = !isomp->im_ronly;
+ isomp->im_devvp->v_specflags &= ~SI_MOUNTEDON;
+ error = VOP_CLOSE(isomp->im_devvp, ronly ? FREAD : FREAD|FWRITE,
+ NOCRED, p);
+ vrele(isomp->im_devvp);
+ free((caddr_t)isomp, M_UFSMNT);
+ mp->mnt_data = (qaddr_t)0;
+ mp->mnt_flag &= ~MNT_LOCAL;
+ return (error);
+}
+
+/*
+ * Check to see if a filesystem is mounted on a block device.
+ */
+iso_mountedon(vp)
+ register struct vnode *vp;
+{
+ register struct vnode *vq;
+
+ if (vp->v_specflags & SI_MOUNTEDON)
+ return (EBUSY);
+ if (vp->v_flag & VALIASED) {
+ for (vq = *vp->v_hashchain; vq; vq = vq->v_specnext) {
+ if (vq->v_rdev != vp->v_rdev ||
+ vq->v_type != vp->v_type)
+ continue;
+ if (vq->v_specflags & SI_MOUNTEDON)
+ return (EBUSY);
+ }
+ }
+ return (0);
+}
+
+/*
+ * Return root of a filesystem
+ */
+isofs_root(mp, vpp)
+ struct mount *mp;
+ struct vnode **vpp;
+{
+ register struct iso_node *ip;
+ struct iso_node *nip;
+ struct vnode tvp;
+ int error;
+ struct iso_mnt *imp = VFSTOISOFS (mp);
+
+ tvp.v_mount = mp;
+ ip = VTOI(&tvp);
+ ip->i_vnode = &tvp;
+ ip->i_dev = imp->im_dev;
+ error = iso_iget(ip, imp->root_extent, &nip,
+ (struct iso_directory_record *) imp->root);
+ if (error)
+ return (error);
+ *vpp = ITOV(nip);
+ return (0);
+}
+
+/*
+ * Get file system statistics.
+ */
+isofs_statfs(mp, sbp, p)
+ struct mount *mp;
+ register struct statfs *sbp;
+ struct proc *p;
+{
+ register struct iso_mnt *isomp;
+ register struct fs *fs;
+
+ isomp = VFSTOISOFS(mp);
+
+ sbp->f_type = MOUNT_ISOFS;
+ sbp->f_fsize = isomp->logical_block_size;
+ sbp->f_bsize = sbp->f_fsize;
+ sbp->f_blocks = isomp->volume_space_size;
+ sbp->f_bfree = 0; /* total free blocks */
+ sbp->f_bavail = 0; /* blocks free for non superuser */
+ sbp->f_files = 0; /* total files */
+ sbp->f_ffree = 0; /* free file nodes */
+ if (sbp != &mp->mnt_stat) {
+ bcopy((caddr_t)mp->mnt_stat.f_mntonname,
+ (caddr_t)&sbp->f_mntonname[0], MNAMELEN);
+ bcopy((caddr_t)mp->mnt_stat.f_mntfromname,
+ (caddr_t)&sbp->f_mntfromname[0], MNAMELEN);
+ }
+ return (0);
+}
+
+isofs_sync(mp, waitfor)
+ struct mount *mp;
+ int waitfor;
+{
+ return (0);
+}
+
+/*
+ * File handle to vnode
+ *
+ * Have to be really careful about stale file handles:
+ * - check that the inode number is in range
+ * - call iget() to get the locked inode
+ * - check for an unallocated inode (i_mode == 0)
+ * - check that the generation number matches
+ */
+isofs_fhtovp(mp, fhp, vpp)
+ register struct mount *mp;
+ struct fid *fhp;
+ struct vnode **vpp;
+{
+ return (EINVAL);
+#if 0
+ /* here's a guess at what we need here */
+ struct vnode tvp;
+ int error;
+
+ ifhp = (struct ifid *)fhp;
+ imp = VFSTOISOFS (mp);
+
+ if (ifhp->ifid_lbn >= imp->volume_space_size)
+ return (EINVAL);
+
+ if (ifhp->ifid_offset + sizeof (struct iso_directory_record)
+ >= imp->im_bsize)
+ return (EINVAL);
+
+ bread (isomp->im_devvp, ifhp->ifid_lbn, imp->im_bsize, NOCRED, &bp);
+
+ dirp = bp->b_un.b_addr + ifhp->ifid_offset;
+
+ if (ifhp->ifid_offset + isonum_711 (dirp) >= imp->im_bsize) {
+ brelse (bp);
+ return (EINVAL);
+ }
+
+ tvp.v_mount = mp;
+ ip = VTOI(&tvp);
+ ip->i_vnode = &tvp;
+ ip->i_dev = imp->im_dev;
+ if (error = iso_iget(ip, ifhp->ifid_ino, &nip, dirp)) {
+ *vpp = NULLVP;
+ brelse (bp);
+ return (error);
+ }
+ ip = nip;
+ *vpp = ITOV(ip);
+ brelse (bp);
+ return (0);
+#endif
+}
+
+/*
+ * Vnode pointer to File handle
+ */
+/* ARGSUSED */
+isofs_vptofh(vp, fhp)
+ struct vnode *vp;
+ struct fid *fhp;
+{
+ return (EINVAL);
+#if 0
+ register struct inode *ip = VTOI(vp);
+ register struct ufid *ufhp;
+
+ ufhp = (struct ufid *)fhp;
+ ufhp->ufid_len = sizeof(struct ufid);
+ ufhp->ufid_ino = ip->i_number;
+ ufhp->ufid_gen = ip->i_gen;
+ return (0);
+#endif
+}
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