Esempio n. 1
0
static int hpfs_rmdir(struct inode *dir, struct dentry *dentry)
{
	const unsigned char *name = dentry->d_name.name;
	unsigned len = dentry->d_name.len;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	struct inode *inode = dentry->d_inode;
	dnode_secno dno;
	fnode_secno fno;
	int n_items = 0;
	int err;
	int r;

	hpfs_adjust_length(name, &len);
	lock_kernel();
	mutex_lock(&hpfs_i(inode)->i_parent_mutex);
	mutex_lock(&hpfs_i(dir)->i_mutex);
	err = -ENOENT;
	de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
	if (!de)
		goto out;

	err = -EPERM;
	if (de->first)
		goto out1;

	err = -ENOTDIR;
	if (!de->directory)
		goto out1;

	hpfs_count_dnodes(dir->i_sb, hpfs_i(inode)->i_dno, NULL, NULL, &n_items);
	err = -ENOTEMPTY;
	if (n_items)
		goto out1;

	fno = de->fnode;
	r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
	switch (r) {
	case 1:
		hpfs_error(dir->i_sb, "there was error when removing dirent");
		err = -EFSERROR;
		break;
	case 2:
		err = -ENOSPC;
		break;
	default:
		drop_nlink(dir);
		clear_nlink(inode);
		err = 0;
	}
	goto out;
out1:
	hpfs_brelse4(&qbh);
out:
	mutex_unlock(&hpfs_i(dir)->i_mutex);
	mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
	unlock_kernel();
	return err;
}
Esempio n. 2
0
static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
{
	const unsigned char *name = dentry->d_name.name;
	unsigned len = dentry->d_name.len;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	struct inode *inode = d_inode(dentry);
	dnode_secno dno;
	int r;
	int err;

	hpfs_lock(dir->i_sb);
	hpfs_adjust_length(name, &len);

	err = -ENOENT;
	de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
	if (!de)
		goto out;

	err = -EPERM;
	if (de->first)
		goto out1;

	err = -EISDIR;
	if (de->directory)
		goto out1;

	r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
	switch (r) {
	case 1:
		hpfs_error(dir->i_sb, "there was error when removing dirent");
		err = -EFSERROR;
		break;
	case 2:		/* no space for deleting */
		err = -ENOSPC;
		break;
	default:
		drop_nlink(inode);
		err = 0;
	}
	goto out;

out1:
	hpfs_brelse4(&qbh);
out:
	if (!err)
		hpfs_update_directory_times(dir);
	hpfs_unlock(dir->i_sb);
	return err;
}
Esempio n. 3
0
void hpfs_write_inode_nolock(struct inode *i)
{
	struct hpfs_inode_info *hpfs_inode = hpfs_i(i);
	struct buffer_head *bh;
	struct fnode *fnode;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	if (i->i_ino == hpfs_sb(i->i_sb)->sb_root) return;
	if (!(fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) return;
	if (i->i_ino != hpfs_sb(i->i_sb)->sb_root && i->i_nlink) {
		if (!(de = map_fnode_dirent(i->i_sb, i->i_ino, fnode, &qbh))) {
			brelse(bh);
			return;
		}
	} else de = NULL;
	if (S_ISREG(i->i_mode)) {
		fnode->file_size = cpu_to_le32(i->i_size);
		if (de) de->file_size = cpu_to_le32(i->i_size);
	} else if (S_ISDIR(i->i_mode)) {
		fnode->file_size = cpu_to_le32(0);
		if (de) de->file_size = cpu_to_le32(0);
	}
	hpfs_write_inode_ea(i, fnode);
	if (de) {
		de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
		de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
		de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
		de->read_only = !(i->i_mode & 0222);
		de->ea_size = cpu_to_le32(hpfs_inode->i_ea_size);
		hpfs_mark_4buffers_dirty(&qbh);
		hpfs_brelse4(&qbh);
	}
	if (S_ISDIR(i->i_mode)) {
		if ((de = map_dirent(i, hpfs_inode->i_dno, "\001\001", 2, NULL, &qbh))) {
			de->write_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_mtime.tv_sec));
			de->read_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_atime.tv_sec));
			de->creation_date = cpu_to_le32(gmt_to_local(i->i_sb, i->i_ctime.tv_sec));
			de->read_only = !(i->i_mode & 0222);
			de->ea_size = cpu_to_le32(/*                     */0);
			de->file_size = cpu_to_le32(0);
			hpfs_mark_4buffers_dirty(&qbh);
			hpfs_brelse4(&qbh);
		} else
			hpfs_error(i->i_sb,
				"directory %08lx doesn't have '.' entry",
				(unsigned long)i->i_ino);
	}
	mark_buffer_dirty(bh);
	brelse(bh);
}
Esempio n. 4
0
static int hpfs_rename(struct inode *old_dir, struct dentry *old_dentry,
		struct inode *new_dir, struct dentry *new_dentry)
{
	const unsigned char *old_name = old_dentry->d_name.name;
	unsigned old_len = old_dentry->d_name.len;
	const unsigned char *new_name = new_dentry->d_name.name;
	unsigned new_len = new_dentry->d_name.len;
	struct inode *i = old_dentry->d_inode;
	struct inode *new_inode = new_dentry->d_inode;
	struct quad_buffer_head qbh, qbh1;
	struct hpfs_dirent *dep, *nde;
	struct hpfs_dirent de;
	dnode_secno dno;
	int r;
	struct buffer_head *bh;
	struct fnode *fnode;
	int err;

	if ((err = hpfs_chk_name(new_name, &new_len))) return err;
	err = 0;
	hpfs_adjust_length(old_name, &old_len);

	hpfs_lock(i->i_sb);
	/* order doesn't matter, due to VFS exclusion */
	
	/* Erm? Moving over the empty non-busy directory is perfectly legal */
	if (new_inode && S_ISDIR(new_inode->i_mode)) {
		err = -EINVAL;
		goto end1;
	}

	if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
		hpfs_error(i->i_sb, "lookup succeeded but map dirent failed");
		err = -ENOENT;
		goto end1;
	}
	copy_de(&de, dep);
	de.hidden = new_name[0] == '.';

	if (new_inode) {
		int r;
		if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 1)) != 2) {
			if ((nde = map_dirent(new_dir, hpfs_i(new_dir)->i_dno, new_name, new_len, NULL, &qbh1))) {
				clear_nlink(new_inode);
				copy_de(nde, &de);
				memcpy(nde->name, new_name, new_len);
				hpfs_mark_4buffers_dirty(&qbh1);
				hpfs_brelse4(&qbh1);
				goto end;
			}
			hpfs_error(new_dir->i_sb, "hpfs_rename: could not find dirent");
			err = -EFSERROR;
			goto end1;
		}
		err = r == 2 ? -ENOSPC : r == 1 ? -EFSERROR : 0;
		goto end1;
	}

	if (new_dir == old_dir) hpfs_brelse4(&qbh);

	if ((r = hpfs_add_dirent(new_dir, new_name, new_len, &de))) {
		if (r == -1) hpfs_error(new_dir->i_sb, "hpfs_rename: dirent already exists!");
		err = r == 1 ? -ENOSPC : -EFSERROR;
		if (new_dir != old_dir) hpfs_brelse4(&qbh);
		goto end1;
	}
	
	if (new_dir == old_dir)
		if (!(dep = map_dirent(old_dir, hpfs_i(old_dir)->i_dno, old_name, old_len, &dno, &qbh))) {
			hpfs_error(i->i_sb, "lookup succeeded but map dirent failed at #2");
			err = -ENOENT;
			goto end1;
		}

	if ((r = hpfs_remove_dirent(old_dir, dno, dep, &qbh, 0))) {
		hpfs_error(i->i_sb, "hpfs_rename: could not remove dirent");
		err = r == 2 ? -ENOSPC : -EFSERROR;
		goto end1;
	}

end:
	hpfs_i(i)->i_parent_dir = new_dir->i_ino;
	if (S_ISDIR(i->i_mode)) {
		inc_nlink(new_dir);
		drop_nlink(old_dir);
	}
	if ((fnode = hpfs_map_fnode(i->i_sb, i->i_ino, &bh))) {
		fnode->up = cpu_to_le32(new_dir->i_ino);
		fnode->len = new_len;
		memcpy(fnode->name, new_name, new_len>15?15:new_len);
		if (new_len < 15) memset(&fnode->name[new_len], 0, 15 - new_len);
		mark_buffer_dirty(bh);
		brelse(bh);
	}
end1:
	if (!err) {
		hpfs_update_directory_times(old_dir);
		hpfs_update_directory_times(new_dir);
	}
	hpfs_unlock(i->i_sb);
	return err;
}
Esempio n. 5
0
static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
{
	const unsigned char *name = dentry->d_name.name;
	unsigned len = dentry->d_name.len;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	struct inode *inode = dentry->d_inode;
	dnode_secno dno;
	int r;
	int rep = 0;
	int err;

	hpfs_lock(dir->i_sb);
	hpfs_adjust_length(name, &len);
again:
	err = -ENOENT;
	de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, &dno, &qbh);
	if (!de)
		goto out;

	err = -EPERM;
	if (de->first)
		goto out1;

	err = -EISDIR;
	if (de->directory)
		goto out1;

	r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
	switch (r) {
	case 1:
		hpfs_error(dir->i_sb, "there was error when removing dirent");
		err = -EFSERROR;
		break;
	case 2:		/* no space for deleting, try to truncate file */

		err = -ENOSPC;
		if (rep++)
			break;

		dentry_unhash(dentry);
		if (!d_unhashed(dentry)) {
			hpfs_unlock(dir->i_sb);
			return -ENOSPC;
		}
		if (generic_permission(inode, MAY_WRITE) ||
		    !S_ISREG(inode->i_mode) ||
		    get_write_access(inode)) {
			d_rehash(dentry);
		} else {
			struct iattr newattrs;
			/*printk("HPFS: truncating file before delete.\n");*/
			newattrs.ia_size = 0;
			newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
			err = notify_change(dentry, &newattrs);
			put_write_access(inode);
			if (!err)
				goto again;
		}
		hpfs_unlock(dir->i_sb);
		return -ENOSPC;
	default:
		drop_nlink(inode);
		err = 0;
	}
	goto out;

out1:
	hpfs_brelse4(&qbh);
out:
	if (!err)
		hpfs_update_directory_times(dir);
	hpfs_unlock(dir->i_sb);
	return err;
}
Esempio n. 6
0
struct super_block *hpfs_read_super(struct super_block *s,
				    void *options, int silent)
{
	struct hpfs_boot_block *bootblock;
	struct hpfs_super_block *superblock;
	struct hpfs_spare_block *spareblock;
	struct hpfs_dirent *de;
	struct buffer_head *bh0, *bh1, *bh2;
	struct quad_buffer_head qbh;
	dnode_secno root_dno;
	dev_t dev;
	uid_t uid;
	gid_t gid;
	umode_t umask;
	int lowercase;
	int conv;
	int dubious;

	/*
	 * Get the mount options
	 */

	if (!parse_opts(options, &uid, &gid, &umask, &lowercase, &conv)) {
		printk("HPFS: syntax error in mount options.  Not mounted.\n");
		s->s_dev = 0;
		return 0;
	}

	/*
	 * Fill in the super block struct
	 */

	lock_super(s);
	dev = s->s_dev;
	set_blocksize(dev, 512);

	/*
	 * fetch sectors 0, 16, 17
	 */

	bootblock = map_sector(dev, 0, &bh0);
	if (!bootblock)
		goto bail;

	superblock = map_sector(dev, 16, &bh1);
	if (!superblock)
		goto bail0;

	spareblock = map_sector(dev, 17, &bh2);
	if (!spareblock)
		goto bail1;

	/*
	 * Check that this fs looks enough like a known one that we can find
	 * and read the root directory.
	 */

	if (bootblock->magic != 0xaa55
	    || superblock->magic != SB_MAGIC
	    || spareblock->magic != SP_MAGIC
	    || bootblock->sig_28h != 0x28
	    || memcmp(&bootblock->sig_hpfs, "HPFS    ", 8)
	    || little_ushort(bootblock->bytes_per_sector) != 512) {
		printk("HPFS: hpfs_read_super: Not HPFS\n");
		goto bail2;
	}

	/*
	 * Check for inconsistencies -- possibly wrong guesses here, possibly
	 * filesystem problems.
	 */

	dubious = 0;

	dubious |= check_warn(spareblock->dirty != 0,
		       "`Improperly stopped'", "flag is set", "run CHKDSK");
	dubious |= check_warn(spareblock->n_spares_used != 0,
			      "Spare blocks", "may be in use", "run CHKDSK");

	/*
	 * Above errors mean we could get wrong answers if we proceed,
	 * so don't
	 */

	if (dubious)
		goto bail2;

	dubious |= check_warn((spareblock->n_dnode_spares !=
			       spareblock->n_dnode_spares_free),
			      "Spare dnodes", "may be in use", "run CHKDSK");
	dubious |= check_warn(superblock->zero1 != 0,
			      "#1", "unknown word nonzero", "investigate");
	dubious |= check_warn(superblock->zero3 != 0,
			      "#3", "unknown word nonzero", "investigate");
	dubious |= check_warn(superblock->zero4 != 0,
			      "#4", "unknown word nonzero", "investigate");
	dubious |= check_warn(!zerop(superblock->zero5,
				     sizeof superblock->zero5),
			      "#5", "unknown word nonzero", "investigate");
	dubious |= check_warn(!zerop(superblock->zero6,
				     sizeof superblock->zero6),
			      "#6", "unknown word nonzero", "investigate");

	if (dubious)
		printk("HPFS: Proceeding, but operation may be unreliable\n");

	/*
	 * set fs read only
	 */

	s->s_flags |= MS_RDONLY;

	/*
	 * fill in standard stuff
	 */

	s->s_magic = HPFS_SUPER_MAGIC;
	s->s_blocksize = 512;
	s->s_blocksize_bits = 9;
	s->s_op = (struct super_operations *) &hpfs_sops;

	/*
	 * fill in hpfs stuff
	 */

	s->s_hpfs_root = dir_ino(superblock->root);
	s->s_hpfs_fs_size = superblock->n_sectors;
	s->s_hpfs_dirband_size = superblock->n_dir_band / 4;
	s->s_hpfs_dmap = superblock->dir_band_bitmap;
	s->s_hpfs_bitmaps = superblock->bitmaps;
	s->s_hpfs_uid = uid;
	s->s_hpfs_gid = gid;
	s->s_hpfs_mode = 0777 & ~umask;
	s->s_hpfs_n_free = -1;
	s->s_hpfs_n_free_dnodes = -1;
	s->s_hpfs_lowercase = lowercase;
	s->s_hpfs_conv = conv;

	/*
	 * done with the low blocks
	 */

	brelse(bh2);
	brelse(bh1);
	brelse(bh0);

	/*
	 * all set.  try it out.
	 */

	s->s_mounted = iget(s, s->s_hpfs_root);
	unlock_super(s);

	if (!s->s_mounted) {
		printk("HPFS: hpfs_read_super: inode get failed\n");
		s->s_dev = 0;
		return 0;
	}

	/*
	 * find the root directory's . pointer & finish filling in the inode
	 */

	root_dno = fnode_dno(dev, s->s_hpfs_root);
	if (root_dno)
		de = map_dirent(s->s_mounted, root_dno, "\001\001", 2, &qbh);
	if (!root_dno || !de) {
		printk("HPFS: "
		       "hpfs_read_super: root dir isn't in the root dir\n");
		s->s_dev = 0;
		return 0;
	}

	s->s_mounted->i_atime = local_to_gmt(de->read_date);
	s->s_mounted->i_mtime = local_to_gmt(de->write_date);
	s->s_mounted->i_ctime = local_to_gmt(de->creation_date);

	brelse4(&qbh);
	return s;

 bail2:
	brelse(bh2);
 bail1:
	brelse(bh1);
 bail0:
	brelse(bh0);
 bail:
	s->s_dev = 0;
	unlock_super(s);
	return 0;
}
Esempio n. 7
0
static int hpfs_lookup(struct inode *dir, const char *name, int len,
		       struct inode **result)
{
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	struct inode *inode;
	ino_t ino;

	/* In case of madness */

	*result = 0;
	if (dir == 0)
		return -ENOENT;
	if (!S_ISDIR(dir->i_mode))
		goto bail;

	/*
	 * Read in the directory entry. "." is there under the name ^A^A .
	 * Always read the dir even for . and .. in case we need the dates.
	 */

	if (name[0] == '.' && len == 1)
		de = map_dirent(dir, dir->i_hpfs_dno, "\001\001", 2, &qbh);
	else if (name[0] == '.' && name[1] == '.' && len == 2)
		de = map_dirent(dir,
				fnode_dno(dir->i_dev, dir->i_hpfs_parent_dir),
				"\001\001", 2, &qbh);
	else
		de = map_dirent(dir, dir->i_hpfs_dno, name, len, &qbh);

	/*
	 * This is not really a bailout, just means file not found.
	 */

	if (!de)
		goto bail;

	/*
	 * Get inode number, what we're after.
	 */

	if (de->directory)
		ino = dir_ino(de->fnode);
	else
		ino = file_ino(de->fnode);

	/*
	 * Go find or make an inode.
	 */

	if (!(inode = iget(dir->i_sb, ino)))
		goto bail1;

	/*
	 * Fill in the info from the directory if this is a newly created
	 * inode.
	 */

	if (!inode->i_atime) {
		inode->i_atime = local_to_gmt(de->read_date);
		inode->i_mtime = local_to_gmt(de->write_date);
		inode->i_ctime = local_to_gmt(de->creation_date);
		if (de->read_only)
			inode->i_mode &= ~0222;
		if (!de->directory) {
			inode->i_size = de->file_size;
			/*
			 * i_blocks should count the fnode and any anodes.
			 * We count 1 for the fnode and don't bother about
			 * anodes -- the disk heads are on the directory band
			 * and we want them to stay there.
			 */
			inode->i_blocks = 1 + ((inode->i_size + 511) >> 9);
		}
Esempio n. 8
0
struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry, struct nameidata *nd)
{
	const unsigned char *name = dentry->d_name.name;
	unsigned len = dentry->d_name.len;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	ino_t ino;
	int err;
	struct inode *result = NULL;
	struct hpfs_inode_info *hpfs_result;

	hpfs_lock(dir->i_sb);
	if ((err = hpfs_chk_name(name, &len))) {
		if (err == -ENAMETOOLONG) {
			hpfs_unlock(dir->i_sb);
			return ERR_PTR(-ENAMETOOLONG);
		}
		goto end_add;
	}

	/*
	 * '.' and '..' will never be passed here.
	 */

	de = map_dirent(dir, hpfs_i(dir)->i_dno, name, len, NULL, &qbh);

	/*
	 * This is not really a bailout, just means file not found.
	 */

	if (!de) goto end;

	/*
	 * Get inode number, what we're after.
	 */

	ino = le32_to_cpu(de->fnode);

	/*
	 * Go find or make an inode.
	 */

	result = iget_locked(dir->i_sb, ino);
	if (!result) {
		hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode");
		goto bail1;
	}
	if (result->i_state & I_NEW) {
		hpfs_init_inode(result);
		if (de->directory)
			hpfs_read_inode(result);
		else if (le32_to_cpu(de->ea_size) && hpfs_sb(dir->i_sb)->sb_eas)
			hpfs_read_inode(result);
		else {
			result->i_mode |= S_IFREG;
			result->i_mode &= ~0111;
			result->i_op = &hpfs_file_iops;
			result->i_fop = &hpfs_file_ops;
			result->i_nlink = 1;
		}
		unlock_new_inode(result);
	}
	hpfs_result = hpfs_i(result);
	if (!de->directory) hpfs_result->i_parent_dir = dir->i_ino;

	if (de->has_acl || de->has_xtd_perm) if (!(dir->i_sb->s_flags & MS_RDONLY)) {
		hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures");
		goto bail1;
	}

	/*
	 * Fill in the info from the directory if this is a newly created
	 * inode.
	 */

	if (!result->i_ctime.tv_sec) {
		if (!(result->i_ctime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->creation_date))))
			result->i_ctime.tv_sec = 1;
		result->i_ctime.tv_nsec = 0;
		result->i_mtime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->write_date));
		result->i_mtime.tv_nsec = 0;
		result->i_atime.tv_sec = local_to_gmt(dir->i_sb, le32_to_cpu(de->read_date));
		result->i_atime.tv_nsec = 0;
		hpfs_result->i_ea_size = le32_to_cpu(de->ea_size);
		if (!hpfs_result->i_ea_mode && de->read_only)
			result->i_mode &= ~0222;
		if (!de->directory) {
			if (result->i_size == -1) {
				result->i_size = le32_to_cpu(de->file_size);
				result->i_data.a_ops = &hpfs_aops;
				hpfs_i(result)->mmu_private = result->i_size;
			/*
			 * i_blocks should count the fnode and any anodes.
			 * We count 1 for the fnode and don't bother about
			 * anodes -- the disk heads are on the directory band
			 * and we want them to stay there.
			 */
				result->i_blocks = 1 + ((result->i_size + 511) >> 9);
			}
		}
	}
Esempio n. 9
0
static int hpfs_fill_super(struct super_block *s, void *options, int silent)
{
	struct buffer_head *bh0, *bh1, *bh2;
	struct hpfs_boot_block *bootblock;
	struct hpfs_super_block *superblock;
	struct hpfs_spare_block *spareblock;
	struct hpfs_sb_info *sbi;
	struct inode *root;

	uid_t uid;
	gid_t gid;
	umode_t umask;
	int lowercase, eas, chk, errs, chkdsk, timeshift;

	dnode_secno root_dno;
	struct hpfs_dirent *de = NULL;
	struct quad_buffer_head qbh;

	int o;

	save_mount_options(s, options);

	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
	if (!sbi) {
		return -ENOMEM;
	}
	s->s_fs_info = sbi;

	sbi->sb_bmp_dir = NULL;
	sbi->sb_cp_table = NULL;

	mutex_init(&sbi->hpfs_mutex);
	hpfs_lock(s);

	uid = current_uid();
	gid = current_gid();
	umask = current_umask();
	lowercase = 0;
	eas = 2;
	chk = 1;
	errs = 1;
	chkdsk = 1;
	timeshift = 0;

	if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase,
	    &eas, &chk, &errs, &chkdsk, &timeshift))) {
		printk("HPFS: bad mount options.\n");
		goto bail0;
	}
	if (o==2) {
		hpfs_help();
		goto bail0;
	}

	/*sbi->sb_mounting = 1;*/
	sb_set_blocksize(s, 512);
	sbi->sb_fs_size = -1;
	if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
	if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
	if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;

	/* Check magics */
	if (/*le16_to_cpu(bootblock->magic) != BB_MAGIC
	    ||*/ le32_to_cpu(superblock->magic) != SB_MAGIC
	    || le32_to_cpu(spareblock->magic) != SP_MAGIC) {
		if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
		goto bail4;
	}

	/* Check version */
	if (!(s->s_flags & MS_RDONLY) &&
	      superblock->funcversion != 2 && superblock->funcversion != 3) {
		printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
			(int)superblock->version, (int)superblock->funcversion);
		printk("HPFS: please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - [email protected]\n");
		goto bail4;
	}

	s->s_flags |= MS_NOATIME;

	/* Fill superblock stuff */
	s->s_magic = HPFS_SUPER_MAGIC;
	s->s_op = &hpfs_sops;
	s->s_d_op = &hpfs_dentry_operations;

	sbi->sb_root = le32_to_cpu(superblock->root);
	sbi->sb_fs_size = le32_to_cpu(superblock->n_sectors);
	sbi->sb_bitmaps = le32_to_cpu(superblock->bitmaps);
	sbi->sb_dirband_start = le32_to_cpu(superblock->dir_band_start);
	sbi->sb_dirband_size = le32_to_cpu(superblock->n_dir_band);
	sbi->sb_dmap = le32_to_cpu(superblock->dir_band_bitmap);
	sbi->sb_uid = uid;
	sbi->sb_gid = gid;
	sbi->sb_mode = 0777 & ~umask;
	sbi->sb_n_free = -1;
	sbi->sb_n_free_dnodes = -1;
	sbi->sb_lowercase = lowercase;
	sbi->sb_eas = eas;
	sbi->sb_chk = chk;
	sbi->sb_chkdsk = chkdsk;
	sbi->sb_err = errs;
	sbi->sb_timeshift = timeshift;
	sbi->sb_was_error = 0;
	sbi->sb_cp_table = NULL;
	sbi->sb_c_bitmap = -1;
	sbi->sb_max_fwd_alloc = 0xffffff;

	if (sbi->sb_fs_size >= 0x80000000) {
		hpfs_error(s, "invalid size in superblock: %08x",
			(unsigned)sbi->sb_fs_size);
		goto bail4;
	}
	
	/* Load bitmap directory */
	if (!(sbi->sb_bmp_dir = hpfs_load_bitmap_directory(s, le32_to_cpu(superblock->bitmaps))))
		goto bail4;
	
	/* Check for general fs errors*/
	if (spareblock->dirty && !spareblock->old_wrote) {
		if (errs == 2) {
			printk("HPFS: Improperly stopped, not mounted\n");
			goto bail4;
		}
		hpfs_error(s, "improperly stopped");
	}

	if (!(s->s_flags & MS_RDONLY)) {
		spareblock->dirty = 1;
		spareblock->old_wrote = 0;
		mark_buffer_dirty(bh2);
	}

	if (le32_to_cpu(spareblock->hotfixes_used) || le32_to_cpu(spareblock->n_spares_used)) {
		if (errs >= 2) {
			printk("HPFS: Hotfixes not supported here, try chkdsk\n");
			mark_dirty(s, 0);
			goto bail4;
		}
		hpfs_error(s, "hotfixes not supported here, try chkdsk");
		if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
		else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
	}
	if (le32_to_cpu(spareblock->n_dnode_spares) != le32_to_cpu(spareblock->n_dnode_spares_free)) {
		if (errs >= 2) {
			printk("HPFS: Spare dnodes used, try chkdsk\n");
			mark_dirty(s, 0);
			goto bail4;
		}
		hpfs_error(s, "warning: spare dnodes used, try chkdsk");
		if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
	}
	if (chk) {
		unsigned a;
		if (le32_to_cpu(superblock->dir_band_end) - le32_to_cpu(superblock->dir_band_start) + 1 != le32_to_cpu(superblock->n_dir_band) ||
		    le32_to_cpu(superblock->dir_band_end) < le32_to_cpu(superblock->dir_band_start) || le32_to_cpu(superblock->n_dir_band) > 0x4000) {
			hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
				le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->dir_band_end), le32_to_cpu(superblock->n_dir_band));
			goto bail4;
		}
		a = sbi->sb_dirband_size;
		sbi->sb_dirband_size = 0;
		if (hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_start), le32_to_cpu(superblock->n_dir_band), "dir_band") ||
		    hpfs_chk_sectors(s, le32_to_cpu(superblock->dir_band_bitmap), 4, "dir_band_bitmap") ||
		    hpfs_chk_sectors(s, le32_to_cpu(superblock->bitmaps), 4, "bitmaps")) {
			mark_dirty(s, 0);
			goto bail4;
		}
		sbi->sb_dirband_size = a;
	} else printk("HPFS: You really don't want any checks? You are crazy...\n");

	/* Load code page table */
	if (le32_to_cpu(spareblock->n_code_pages))
		if (!(sbi->sb_cp_table = hpfs_load_code_page(s, le32_to_cpu(spareblock->code_page_dir))))
			printk("HPFS: Warning: code page support is disabled\n");

	brelse(bh2);
	brelse(bh1);
	brelse(bh0);

	root = iget_locked(s, sbi->sb_root);
	if (!root)
		goto bail0;
	hpfs_init_inode(root);
	hpfs_read_inode(root);
	unlock_new_inode(root);
	s->s_root = d_alloc_root(root);
	if (!s->s_root) {
		iput(root);
		goto bail0;
	}

	/*
	 * find the root directory's . pointer & finish filling in the inode
	 */

	root_dno = hpfs_fnode_dno(s, sbi->sb_root);
	if (root_dno)
		de = map_dirent(root, root_dno, "\001\001", 2, NULL, &qbh);
	if (!de)
		hpfs_error(s, "unable to find root dir");
	else {
		root->i_atime.tv_sec = local_to_gmt(s, le32_to_cpu(de->read_date));
		root->i_atime.tv_nsec = 0;
		root->i_mtime.tv_sec = local_to_gmt(s, le32_to_cpu(de->write_date));
		root->i_mtime.tv_nsec = 0;
		root->i_ctime.tv_sec = local_to_gmt(s, le32_to_cpu(de->creation_date));
		root->i_ctime.tv_nsec = 0;
		hpfs_i(root)->i_ea_size = le16_to_cpu(de->ea_size);
		hpfs_i(root)->i_parent_dir = root->i_ino;
		if (root->i_size == -1)
			root->i_size = 2048;
		if (root->i_blocks == -1)
			root->i_blocks = 5;
		hpfs_brelse4(&qbh);
	}
	hpfs_unlock(s);
	return 0;

bail4:	brelse(bh2);
bail3:	brelse(bh1);
bail2:	brelse(bh0);
bail1:
bail0:
	hpfs_unlock(s);
	kfree(sbi->sb_bmp_dir);
	kfree(sbi->sb_cp_table);
	s->s_fs_info = NULL;
	kfree(sbi);
	return -EINVAL;
}
Esempio n. 10
0
static int hpfs_unlink(struct inode *dir, struct dentry *dentry)
{
	const char *name = dentry->d_name.name;
	unsigned len = dentry->d_name.len;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	struct inode *inode = dentry->d_inode;
	dnode_secno dno;
	fnode_secno fno;
	int r;
	int rep = 0;
	int err;

	lock_kernel();
	hpfs_adjust_length((char *)name, &len);
again:
	mutex_lock(&hpfs_i(inode)->i_parent_mutex);
	mutex_lock(&hpfs_i(dir)->i_mutex);
	err = -ENOENT;
	de = map_dirent(dir, hpfs_i(dir)->i_dno, (char *)name, len, &dno, &qbh);
	if (!de)
		goto out;

	err = -EPERM;
	if (de->first)
		goto out1;

	err = -EISDIR;
	if (de->directory)
		goto out1;

	fno = de->fnode;
	r = hpfs_remove_dirent(dir, dno, de, &qbh, 1);
	switch (r) {
	case 1:
		hpfs_error(dir->i_sb, "there was error when removing dirent");
		err = -EFSERROR;
		break;
	case 2:		/* no space for deleting, try to truncate file */

		err = -ENOSPC;
		if (rep++)
			break;

		mutex_unlock(&hpfs_i(dir)->i_mutex);
		mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
		d_drop(dentry);
		spin_lock(&dentry->d_lock);
		if (atomic_read(&dentry->d_count) > 1 ||
		    permission(inode, MAY_WRITE, NULL) ||
		    !S_ISREG(inode->i_mode) ||
		    get_write_access(inode)) {
			spin_unlock(&dentry->d_lock);
			d_rehash(dentry);
		} else {
			struct iattr newattrs;
			spin_unlock(&dentry->d_lock);
			/*printk("HPFS: truncating file before delete.\n");*/
			newattrs.ia_size = 0;
			newattrs.ia_valid = ATTR_SIZE | ATTR_CTIME;
			err = notify_change(dentry, &newattrs);
			put_write_access(inode);
			if (!err)
				goto again;
		}
		unlock_kernel();
		return -ENOSPC;
	default:
		inode->i_nlink--;
		err = 0;
	}
	goto out;

out1:
	hpfs_brelse4(&qbh);
out:
	mutex_unlock(&hpfs_i(dir)->i_mutex);
	mutex_unlock(&hpfs_i(inode)->i_parent_mutex);
	unlock_kernel();
	return err;
}
Esempio n. 11
0
struct dentry *hpfs_lookup(struct inode *dir, struct dentry *dentry)
{
	const char *name = dentry->d_name.name;
	unsigned len = dentry->d_name.len;
	struct quad_buffer_head qbh;
	struct hpfs_dirent *de;
	ino_t ino;
	int err;
	struct inode *result = NULL;

	if ((err = hpfs_chk_name((char *)name, &len))) {
		if (err == -ENAMETOOLONG) return ERR_PTR(-ENAMETOOLONG);
		goto end_add;
	}

	hpfs_lock_inode(dir);
	/*
	 * '.' and '..' will never be passed here.
	 */

	de = map_dirent(dir, dir->i_hpfs_dno, (char *) name, len, NULL, &qbh);

	/*
	 * This is not really a bailout, just means file not found.
	 */

	if (!de) goto end;

	/*
	 * Get inode number, what we're after.
	 */

	ino = de->fnode;

	/*
	 * Go find or make an inode.
	 */

	hpfs_lock_iget(dir->i_sb, de->directory || (de->ea_size && dir->i_sb->s_hpfs_eas) ? 1 : 2);
	if (!(result = iget(dir->i_sb, ino))) {
		hpfs_unlock_iget(dir->i_sb);
		hpfs_error(dir->i_sb, "hpfs_lookup: can't get inode");
		goto bail1;
	}
	if (!de->directory) result->i_hpfs_parent_dir = dir->i_ino;
	hpfs_unlock_iget(dir->i_sb);

	hpfs_decide_conv(result, (char *)name, len);

	if (de->has_acl || de->has_xtd_perm) if (!(dir->i_sb->s_flags & MS_RDONLY)) {
		hpfs_error(result->i_sb, "ACLs or XPERM found. This is probably HPFS386. This driver doesn't support it now. Send me some info on these structures");
		goto bail1;
	}

	/*
	 * Fill in the info from the directory if this is a newly created
	 * inode.
	 */

	if (!result->i_ctime) {
		if (!(result->i_ctime = local_to_gmt(dir->i_sb, de->creation_date)))
			result->i_ctime = 1;
		result->i_mtime = local_to_gmt(dir->i_sb, de->write_date);
		result->i_atime = local_to_gmt(dir->i_sb, de->read_date);
		result->i_hpfs_ea_size = de->ea_size;
		if (!result->i_hpfs_ea_mode && de->read_only)
			result->i_mode &= ~0222;
		if (!de->directory) {
			if (result->i_size == -1) {
				result->i_size = de->file_size;
				result->i_data.a_ops = &hpfs_aops;
				result->u.hpfs_i.mmu_private = result->i_size;
			/*
			 * i_blocks should count the fnode and any anodes.
			 * We count 1 for the fnode and don't bother about
			 * anodes -- the disk heads are on the directory band
			 * and we want them to stay there.
			 */
				result->i_blocks = 1 + ((result->i_size + 511) >> 9);
			}
		}
	}
Esempio n. 12
0
struct super_block *hpfs_read_super(struct super_block *s, void *options,
				    int silent)
{
	kdev_t dev;
	struct buffer_head *bh0, *bh1, *bh2;
	struct hpfs_boot_block *bootblock;
	struct hpfs_super_block *superblock;
	struct hpfs_spare_block *spareblock;

	uid_t uid;
	gid_t gid;
	umode_t umask;
	int lowercase, conv, eas, chk, errs, chkdsk, timeshift;

	dnode_secno root_dno;
	struct hpfs_dirent *de = NULL;
	struct quad_buffer_head qbh;

	int o;

	s->s_hpfs_bmp_dir = NULL;
	s->s_hpfs_cp_table = NULL;

	s->s_hpfs_creation_de_lock = s->s_hpfs_rd_inode = 0;
	init_waitqueue_head(&s->s_hpfs_creation_de);
	init_waitqueue_head(&s->s_hpfs_iget_q);

	uid = current->uid;
	gid = current->gid;
	umask = current->fs->umask;
	lowercase = 0;
	conv = CONV_BINARY;
	eas = 2;
	chk = 1;
	errs = 1;
	chkdsk = 1;
	timeshift = 0;

	if (!(o = parse_opts(options, &uid, &gid, &umask, &lowercase, &conv,
	    &eas, &chk, &errs, &chkdsk, &timeshift))) {
		printk("HPFS: bad mount options.\n");
		goto bail0;
	}
	if (o==2) {
		hpfs_help();
		goto bail0;
	}

	/*s->s_hpfs_mounting = 1;*/
	dev = s->s_dev;
	set_blocksize(dev, 512);
	s->s_hpfs_fs_size = -1;
	if (!(bootblock = hpfs_map_sector(s, 0, &bh0, 0))) goto bail1;
	if (!(superblock = hpfs_map_sector(s, 16, &bh1, 1))) goto bail2;
	if (!(spareblock = hpfs_map_sector(s, 17, &bh2, 0))) goto bail3;

	/* Check magics */
	if (/*bootblock->magic != BB_MAGIC
	    ||*/ superblock->magic != SB_MAGIC
	    || spareblock->magic != SP_MAGIC) {
		if (!silent) printk("HPFS: Bad magic ... probably not HPFS\n");
		goto bail4;
	}

	/* Check version */
	if (!(s->s_flags & MS_RDONLY) &&
	      superblock->funcversion != 2 && superblock->funcversion != 3) {
		printk("HPFS: Bad version %d,%d. Mount readonly to go around\n",
			(int)superblock->version, (int)superblock->funcversion);
		printk("HPFS: please try recent version of HPFS driver at http://artax.karlin.mff.cuni.cz/~mikulas/vyplody/hpfs/index-e.cgi and if it still can't understand this format, contact author - [email protected]\n");
		goto bail4;
	}

	s->s_flags |= MS_NOATIME;

	/* Fill superblock stuff */
	s->s_magic = HPFS_SUPER_MAGIC;
	s->s_blocksize = 512;
	s->s_blocksize_bits = 9;
	s->s_op = &hpfs_sops;

	s->s_hpfs_root = superblock->root;
	s->s_hpfs_fs_size = superblock->n_sectors;
	s->s_hpfs_bitmaps = superblock->bitmaps;
	s->s_hpfs_dirband_start = superblock->dir_band_start;
	s->s_hpfs_dirband_size = superblock->n_dir_band;
	s->s_hpfs_dmap = superblock->dir_band_bitmap;
	s->s_hpfs_uid = uid;
	s->s_hpfs_gid = gid;
	s->s_hpfs_mode = 0777 & ~umask;
	s->s_hpfs_n_free = -1;
	s->s_hpfs_n_free_dnodes = -1;
	s->s_hpfs_lowercase = lowercase;
	s->s_hpfs_conv = conv;
	s->s_hpfs_eas = eas;
	s->s_hpfs_chk = chk;
	s->s_hpfs_chkdsk = chkdsk;
	s->s_hpfs_err = errs;
	s->s_hpfs_timeshift = timeshift;
	s->s_hpfs_was_error = 0;
	s->s_hpfs_cp_table = NULL;
	s->s_hpfs_c_bitmap = -1;
	
	/* Load bitmap directory */
	if (!(s->s_hpfs_bmp_dir = hpfs_load_bitmap_directory(s, superblock->bitmaps)))
		goto bail4;
	
	/* Check for general fs errors*/
	if (spareblock->dirty && !spareblock->old_wrote) {
		if (errs == 2) {
			printk("HPFS: Improperly stopped, not mounted\n");
			goto bail4;
		}
		hpfs_error(s, "improperly stopped");
	}

	if (!(s->s_flags & MS_RDONLY)) {
		spareblock->dirty = 1;
		spareblock->old_wrote = 0;
		mark_buffer_dirty(bh2);
	}

	if (spareblock->hotfixes_used || spareblock->n_spares_used) {
		if (errs >= 2) {
			printk("HPFS: Hotfixes not supported here, try chkdsk\n");
			mark_dirty(s);
			goto bail4;
		}
		hpfs_error(s, "hotfixes not supported here, try chkdsk");
		if (errs == 0) printk("HPFS: Proceeding, but your filesystem will be probably corrupted by this driver...\n");
		else printk("HPFS: This driver may read bad files or crash when operating on disk with hotfixes.\n");
	}
	if (spareblock->n_dnode_spares != spareblock->n_dnode_spares_free) {
		if (errs >= 2) {
			printk("HPFS: Spare dnodes used, try chkdsk\n");
			mark_dirty(s);
			goto bail4;
		}
		hpfs_error(s, "warning: spare dnodes used, try chkdsk");
		if (errs == 0) printk("HPFS: Proceeding, but your filesystem could be corrupted if you delete files or directories\n");
	}
	if (chk) {
		unsigned a;
		if (superblock->dir_band_end - superblock->dir_band_start + 1 != superblock->n_dir_band ||
		    superblock->dir_band_end < superblock->dir_band_start || superblock->n_dir_band > 0x4000) {
			hpfs_error(s, "dir band size mismatch: dir_band_start==%08x, dir_band_end==%08x, n_dir_band==%08x",
				superblock->dir_band_start, superblock->dir_band_end, superblock->n_dir_band);
			goto bail4;
		}
		a = s->s_hpfs_dirband_size;
		s->s_hpfs_dirband_size = 0;
		if (hpfs_chk_sectors(s, superblock->dir_band_start, superblock->n_dir_band, "dir_band") ||
		    hpfs_chk_sectors(s, superblock->dir_band_bitmap, 4, "dir_band_bitmap") ||
		    hpfs_chk_sectors(s, superblock->bitmaps, 4, "bitmaps")) {
			mark_dirty(s);
			goto bail4;
		}
		s->s_hpfs_dirband_size = a;
	} else printk("HPFS: You really don't want any checks? You are crazy...\n");

	/* Load code page table */
	if (spareblock->n_code_pages)
		if (!(s->s_hpfs_cp_table = hpfs_load_code_page(s, spareblock->code_page_dir)))
			printk("HPFS: Warning: code page support is disabled\n");

	brelse(bh2);
	brelse(bh1);
	brelse(bh0);

	hpfs_lock_iget(s, 1);
	s->s_root = d_alloc_root(iget(s, s->s_hpfs_root));
	hpfs_unlock_iget(s);
	if (!s->s_root || !s->s_root->d_inode) {
		printk("HPFS: iget failed. Why???\n");
		goto bail0;
	}
	hpfs_set_dentry_operations(s->s_root);

	/*
	 * find the root directory's . pointer & finish filling in the inode
	 */

	root_dno = hpfs_fnode_dno(s, s->s_hpfs_root);
	if (root_dno)
		de = map_dirent(s->s_root->d_inode, root_dno, "\001\001", 2, NULL, &qbh);
	if (!root_dno || !de) hpfs_error(s, "unable to find root dir");
	else {
		s->s_root->d_inode->i_atime = local_to_gmt(s, de->read_date);
		s->s_root->d_inode->i_mtime = local_to_gmt(s, de->write_date);
		s->s_root->d_inode->i_ctime = local_to_gmt(s, de->creation_date);
		s->s_root->d_inode->i_hpfs_ea_size = de->ea_size;
		s->s_root->d_inode->i_hpfs_parent_dir = s->s_root->d_inode->i_ino;
		if (s->s_root->d_inode->i_size == -1) s->s_root->d_inode->i_size = 2048;
		if (s->s_root->d_inode->i_blocks == -1) s->s_root->d_inode->i_blocks = 5;
	}
	if (de) hpfs_brelse4(&qbh);

	return s;

bail4:	brelse(bh2);
bail3:	brelse(bh1);
bail2:	brelse(bh0);
bail1:
bail0:
	if (s->s_hpfs_bmp_dir) kfree(s->s_hpfs_bmp_dir);
	if (s->s_hpfs_cp_table) kfree(s->s_hpfs_cp_table);
	return NULL;
}