int
cd9660_mountroot(void)
{
struct mount *mp;
extern struct vnode *rootvp;
struct proc *p = curproc; /* XXX */
int error;
struct iso_args args;
/*
* Get vnodes for swapdev and rootdev.
*/
if ((error = bdevvp(swapdev, &swapdev_vp)) ||
(error = bdevvp(rootdev, &rootvp))) {
printf("cd9660_mountroot: can't setup bdevvp's");
return (error);
}
if ((error = vfs_rootmountalloc("cd9660", "root_device", &mp)) != 0)
return (error);
args.flags = ISOFSMNT_ROOT;
if ((error = iso_mountfs(rootvp, mp, p, &args)) != 0) {
mp->mnt_vfc->vfc_refcount--;
vfs_unbusy(mp);
free(mp, M_MOUNT, 0);
return (error);
}
TAILQ_INSERT_TAIL(&mountlist, mp, mnt_list);
(void)cd9660_statfs(mp, &mp->mnt_stat, p);
vfs_unbusy(mp);
inittodr(0);
return (0);
}
static int
iso_mountroot(struct mount *mp)
{
struct iso_args args;
struct vnode *rootvp;
int error;
if ((error = bdevvp(rootdev, &rootvp))) {
kprintf("iso_mountroot: can't find rootvp\n");
return (error);
}
args.flags = ISOFSMNT_ROOT;
vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_OPEN(rootvp, FREAD, FSCRED, NULL);
vn_unlock(rootvp);
if (error)
return (error);
args.ssector = iso_get_ssector(rootdev);
vn_lock(rootvp, LK_EXCLUSIVE | LK_RETRY);
VOP_CLOSE(rootvp, FREAD, NULL);
vn_unlock(rootvp);
if (bootverbose)
kprintf("iso_mountroot(): using session at block %d\n",
args.ssector);
if ((error = iso_mountfs(rootvp, mp, &args)) != 0)
return (error);
cd9660_statfs(mp, &mp->mnt_stat, proc0.p_ucred);
return (0);
}
int
cd9660_mountroot(void)
{
struct mount *mp;
struct lwp *l = curlwp;
int error;
struct iso_args args;
if (device_class(root_device) != DV_DISK)
return (ENODEV);
if ((error = vfs_rootmountalloc(MOUNT_CD9660, "root_device", &mp))
!= 0) {
vrele(rootvp);
return (error);
}
args.flags = ISOFSMNT_ROOT;
if ((error = iso_mountfs(rootvp, mp, l, &args)) != 0) {
vfs_unbusy(mp, false, NULL);
vfs_destroy(mp);
return (error);
}
mountlist_append(mp);
(void)cd9660_statvfs(mp, &mp->mnt_stat);
vfs_unbusy(mp, false, NULL);
return (0);
}
int
cd9660_mountroot()
{
register struct mount *mp;
extern struct vnode *rootvp;
struct proc *p = current_proc(); /* XXX */
struct iso_mnt *imp;
size_t size;
int error;
struct iso_args args;
/*
* Get vnodes for swapdev and rootdev.
*/
if ( bdevvp(rootdev, &rootvp))
panic("cd9660_mountroot: can't setup bdevvp's");
MALLOC_ZONE(mp, struct mount *,
sizeof(struct mount), M_MOUNT, M_WAITOK);
bzero((char *)mp, (u_long)sizeof(struct mount));
/* Initialize the default IO constraints */
mp->mnt_maxreadcnt = mp->mnt_maxwritecnt = MAXPHYS;
mp->mnt_segreadcnt = mp->mnt_segwritecnt = 32;
mp->mnt_op = &cd9660_vfsops;
mp->mnt_flag = MNT_RDONLY;
LIST_INIT(&mp->mnt_vnodelist);
args.flags = ISOFSMNT_ROOT;
args.ssector = 0;
args.fspec = 0;
args.toc_length = 0;
args.toc = 0;
if ((error = iso_mountfs(rootvp, mp, p, &args))) {
vrele(rootvp); /* release the reference from bdevvp() */
if (mp->mnt_kern_flag & MNTK_IO_XINFO)
FREE(mp->mnt_xinfo_ptr, M_TEMP);
FREE_ZONE(mp, sizeof (struct mount), M_MOUNT);
return (error);
}
simple_lock(&mountlist_slock);
CIRCLEQ_INSERT_TAIL(&mountlist, mp, mnt_list);
simple_unlock(&mountlist_slock);
mp->mnt_vnodecovered = NULLVP;
imp = VFSTOISOFS(mp);
(void) copystr("/", mp->mnt_stat.f_mntonname, MNAMELEN - 1,
&size);
bzero(mp->mnt_stat.f_mntonname + size, MNAMELEN - size);
(void) copystr(ROOTNAME, mp->mnt_stat.f_mntfromname, MNAMELEN - 1,
&size);
bzero(mp->mnt_stat.f_mntfromname + size, MNAMELEN - size);
(void)cd9660_statfs(mp, &mp->mnt_stat, p);
return (0);
}
static int
cd9660_mount(struct mount *mp, struct thread *td)
{
struct vnode *devvp;
char *fspec;
int error;
mode_t accessmode;
struct nameidata ndp;
struct iso_mnt *imp = 0;
/*
* Unconditionally mount as read-only.
*/
MNT_ILOCK(mp);
mp->mnt_flag |= MNT_RDONLY;
MNT_IUNLOCK(mp);
fspec = vfs_getopts(mp->mnt_optnew, "from", &error);
if (error)
return (error);
imp = VFSTOISOFS(mp);
if (mp->mnt_flag & MNT_UPDATE) {
if (vfs_flagopt(mp->mnt_optnew, "export", NULL, 0))
return (0);
}
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
NDINIT(&ndp, LOOKUP, FOLLOW | LOCKLEAF, UIO_SYSSPACE, fspec, td);
if ((error = namei(&ndp)))
return (error);
NDFREE(&ndp, NDF_ONLY_PNBUF);
devvp = ndp.ni_vp;
if (!vn_isdisk(devvp, &error)) {
vput(devvp);
return (error);
}
/*
* Verify that user has necessary permissions on the device,
* or has superuser abilities
*/
accessmode = VREAD;
error = VOP_ACCESS(devvp, accessmode, td->td_ucred, td);
if (error)
error = priv_check(td, PRIV_VFS_MOUNT_PERM);
if (error) {
vput(devvp);
return (error);
}
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
error = iso_mountfs(devvp, mp, td);
if (error)
vrele(devvp);
} else {
if (devvp != imp->im_devvp)
error = EINVAL; /* needs translation */
vput(devvp);
}
if (error)
return (error);
vfs_mountedfrom(mp, fspec);
return (0);
}
/*
* VFS Operations.
*
* mount system call
*/
int
cd9660_mount(struct mount *mp, const char *path, void *data, size_t *data_len)
{
struct lwp *l = curlwp;
struct vnode *devvp;
struct iso_args *args = data;
int error;
struct iso_mnt *imp = VFSTOISOFS(mp);
if (*data_len < sizeof *args)
return EINVAL;
if (mp->mnt_flag & MNT_GETARGS) {
if (imp == NULL)
return EIO;
args->fspec = NULL;
args->flags = imp->im_flags;
*data_len = sizeof (*args);
return 0;
}
if ((mp->mnt_flag & MNT_RDONLY) == 0)
return (EROFS);
if ((mp->mnt_flag & MNT_UPDATE) && args->fspec == NULL)
return EINVAL;
/*
* Not an update, or updating the name: look up the name
* and verify that it refers to a sensible block device.
*/
error = namei_simple_user(args->fspec,
NSM_FOLLOW_NOEMULROOT, &devvp);
if (error != 0)
return (error);
if (devvp->v_type != VBLK) {
vrele(devvp);
return ENOTBLK;
}
if (bdevsw_lookup(devvp->v_rdev) == NULL) {
vrele(devvp);
return ENXIO;
}
/*
* If mount by non-root, then verify that user has necessary
* permissions on the device.
*/
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = kauth_authorize_system(l->l_cred, KAUTH_SYSTEM_MOUNT,
KAUTH_REQ_SYSTEM_MOUNT_DEVICE, mp, devvp, KAUTH_ARG(VREAD));
VOP_UNLOCK(devvp);
if (error) {
vrele(devvp);
return (error);
}
if ((mp->mnt_flag & MNT_UPDATE) == 0) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
error = VOP_OPEN(devvp, FREAD, FSCRED);
VOP_UNLOCK(devvp);
if (error)
goto fail;
error = iso_mountfs(devvp, mp, l, args);
if (error) {
vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY);
(void)VOP_CLOSE(devvp, FREAD, NOCRED);
VOP_UNLOCK(devvp);
goto fail;
}
} else {
vrele(devvp);
if (devvp != imp->im_devvp &&
devvp->v_rdev != imp->im_devvp->v_rdev)
return (EINVAL); /* needs translation */
}
return set_statvfs_info(path, UIO_USERSPACE, args->fspec, UIO_USERSPACE,
mp->mnt_op->vfs_name, mp, l);
fail:
vrele(devvp);
return (error);
}
