1 // SPDX-License-Identifier: GPL-2.0
5  *  (C) 2004  Paul Serice - The new inode scheme requires switching
7  *                          the NFS export operations have to be hand
28 		return ERR_PTR(-ESTALE);  in isofs_export_iget()
32 	if (generation && inode->i_generation != generation) {  in isofs_export_iget()
34 		return ERR_PTR(-ESTALE);  in isofs_export_iget()
50 	struct iso_directory_record *de = NULL;  in isofs_export_get_parent()  local
54 	/* "child" must always be a directory. */  in isofs_export_get_parent()
55 	if (!S_ISDIR(child_inode->i_mode)) {  in isofs_export_get_parent()
58 		rv = ERR_PTR(-EACCES);  in isofs_export_get_parent()
63 	 * it is not zero, it means the directory failed to be  in isofs_export_get_parent()
65 	if (e_child_inode->i_iget5_offset != 0) {  in isofs_export_get_parent()
68 		rv = ERR_PTR(-EACCES);  in isofs_export_get_parent()
75 	parent_block = e_child_inode->i_iget5_block;  in isofs_export_get_parent()
78 	bh = sb_bread(child_inode->i_sb, parent_block);  in isofs_export_get_parent()
80 		rv = ERR_PTR(-EACCES);  in isofs_export_get_parent()
85 	de = (struct iso_directory_record*)bh->b_data;  in isofs_export_get_parent()
88 	parent_offset = (unsigned long)isonum_711(de->length);  in isofs_export_get_parent()
89 	de = (struct iso_directory_record*)(bh->b_data + parent_offset);  in isofs_export_get_parent()
92 	if ((isonum_711(de->name_len) != 1) || (de->name[0] != 1)) {  in isofs_export_get_parent()
95 		rv = ERR_PTR(-EACCES);  in isofs_export_get_parent()
100 	isofs_normalize_block_and_offset(de, &parent_block, &parent_offset);  in isofs_export_get_parent()
102 	rv = d_obtain_alias(isofs_iget(child_inode->i_sb, parent_block,  in isofs_export_get_parent()
136 	fh32[0] = ei->i_iget5_block;  in isofs_export_encode_fh()
137  	fh16[2] = (__u16)ei->i_iget5_offset;  /* fh16 [sic] */  in isofs_export_encode_fh()
139 	fh32[2] = inode->i_generation;  in isofs_export_encode_fh()
143 		fh32[3] = eparent->i_iget5_block;  in isofs_export_encode_fh()
144 		fh16[3] = (__u16)eparent->i_iget5_offset;  /* fh16 [sic] */  in isofs_export_encode_fh()
145 		fh32[4] = parent->i_generation;  in isofs_export_encode_fh()
170 	return isofs_export_iget(sb, ifid->block, ifid->offset,  in isofs_fh_to_dentry()
171 			ifid->generation);  in isofs_fh_to_dentry()
183 			fh_len > 2 ? ifid->parent_block : 0,  in isofs_fh_to_parent()
184 			ifid->parent_offset,  in isofs_fh_to_parent()
185 			fh_len > 4 ? ifid->parent_generation : 0);  in isofs_fh_to_parent()