C++ (Cpp) udf_mountfs Examples

Example #1

File: udf_vfsops.c Project: 7shi/openbsd-loongson-vc

int
udf_mount(struct mount *mp, const char *path, void *data,
    struct nameidata *ndp,  struct proc *p)
{
	struct vnode *devvp;	/* vnode of the mount device */
	struct udf_args args;
	size_t len;
	int error;

	if ((mp->mnt_flag & MNT_RDONLY) == 0) {
		mp->mnt_flag |= MNT_RDONLY;
#ifdef UDF_DEBUG
		printf("udf_mount: enforcing read-only mode\n");
#endif
	}

	/*
	 * No root filesystem support.  Probably not a big deal, since the
	 * bootloader doesn't understand UDF.
	 */
	if (mp->mnt_flag & MNT_ROOTFS)
		return (EOPNOTSUPP);

	error = copyin(data, &args, sizeof(struct udf_args));
	if (error)
		return (error);

	if (args.fspec == NULL)
		return (EINVAL);

	NDINIT(ndp, LOOKUP, FOLLOW, UIO_USERSPACE, args.fspec, p);
	if ((error = namei(ndp)))
		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);
	}

	/* Check the access rights on the mount device */
	if (p->p_ucred->cr_uid) {
		vn_lock(devvp, LK_EXCLUSIVE | LK_RETRY, p);
		error = VOP_ACCESS(devvp, VREAD, p->p_ucred, p);
		VOP_UNLOCK(devvp, 0, p);
		if (error) {
			vrele(devvp);
			return (error);
		}
	}

	if ((error = udf_mountfs(devvp, mp, args.lastblock, p))) {
		vrele(devvp);
		return (error);
	}

	/*
	 * Keep a copy of the mount information.
	 */
	copyinstr(path, mp->mnt_stat.f_mntonname, MNAMELEN - 1, &len);
	bzero(mp->mnt_stat.f_mntonname + len, MNAMELEN - len);
	copyinstr(args.fspec, mp->mnt_stat.f_mntfromname, MNAMELEN - 1, &len);
	bzero(mp->mnt_stat.f_mntfromname + len, MNAMELEN - len);

	return (0);
};

Example #2

File: udf_vfsops.c Project: coyizumi/cs111

static int
udf_mount(struct mount *mp)
{
	struct vnode *devvp;	/* vnode of the mount device */
	struct thread *td;
	struct udf_mnt *imp = NULL;
	struct vfsoptlist *opts;
	char *fspec, *cs_disk, *cs_local;
	int error, len, *udf_flags;
	struct nameidata nd, *ndp = &nd;

	td = curthread;
	opts = mp->mnt_optnew;

	/*
	 * Unconditionally mount as read-only.
	 */
	MNT_ILOCK(mp);
	mp->mnt_flag |= MNT_RDONLY;
	MNT_IUNLOCK(mp);

	/*
	 * No root filesystem support.  Probably not a big deal, since the
	 * bootloader doesn't understand UDF.
	 */
	if (mp->mnt_flag & MNT_ROOTFS)
		return (ENOTSUP);

	fspec = NULL;
	error = vfs_getopt(opts, "from", (void **)&fspec, &len);
	if (!error && fspec[len - 1] != '\0')
		return (EINVAL);

	if (mp->mnt_flag & MNT_UPDATE) {
		return (0);
	}

	/* Check that the mount device exists */
	if (fspec == NULL)
		return (EINVAL);
	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) == 0) {
		vput(devvp);
		return (error);
	}

	/* Check the access rights on the mount device */
	error = VOP_ACCESS(devvp, VREAD, td->td_ucred, td);
	if (error)
		error = priv_check(td, PRIV_VFS_MOUNT_PERM);
	if (error) {
		vput(devvp);
		return (error);
	}

	if ((error = udf_mountfs(devvp, mp))) {
		vrele(devvp);
		return (error);
	}

	imp = VFSTOUDFFS(mp);

	udf_flags = NULL;
	error = vfs_getopt(opts, "flags", (void **)&udf_flags, &len);
	if (error || len != sizeof(int))
		return (EINVAL);
	imp->im_flags = *udf_flags;

	if (imp->im_flags & UDFMNT_KICONV && udf_iconv) {
		cs_disk = NULL;
		error = vfs_getopt(opts, "cs_disk", (void **)&cs_disk, &len);
		if (!error && cs_disk[len - 1] != '\0')
			return (EINVAL);
		cs_local = NULL;
		error = vfs_getopt(opts, "cs_local", (void **)&cs_local, &len);
		if (!error && cs_local[len - 1] != '\0')
			return (EINVAL);
		udf_iconv->open(cs_local, cs_disk, &imp->im_d2l);
#if 0
		udf_iconv->open(cs_disk, cs_local, &imp->im_l2d);
#endif
	}

	vfs_mountedfrom(mp, fspec);
	return 0;
};