1 // SPDX-License-Identifier: GPL-2.0-only
6  *	Symlink handling routines for the OSTA-UDF(tm) filesystem.
9  *  (C) 1998-2001 Ben Fennema
31 	struct pathComponent *pc;  in udf_pc_to_char()  local
37 	tolen--;  in udf_pc_to_char()
39 		pc = (struct pathComponent *)(from + elen);  in udf_pc_to_char()
41 		switch (pc->componentType) {  in udf_pc_to_char()
47 			if (pc->lengthComponentIdent > 0) {  in udf_pc_to_char()
48 				elen += pc->lengthComponentIdent;  in udf_pc_to_char()
54 				return -ENAMETOOLONG;  in udf_pc_to_char()
57 			tolen--;  in udf_pc_to_char()
61 				return -ENAMETOOLONG;  in udf_pc_to_char()
64 			tolen -= 3;  in udf_pc_to_char()
68 				return -ENAMETOOLONG;  in udf_pc_to_char()
71 			tolen -= 2;  in udf_pc_to_char()
72 			/* that would be . - just ignore */  in udf_pc_to_char()
75 			elen += pc->lengthComponentIdent;  in udf_pc_to_char()
77 				return -EIO;  in udf_pc_to_char()
78 			comp_len = udf_get_filename(sb, pc->componentIdent,  in udf_pc_to_char()
79 						    pc->lengthComponentIdent,  in udf_pc_to_char()
85 			tolen -= comp_len;  in udf_pc_to_char()
87 				return -ENAMETOOLONG;  in udf_pc_to_char()
89 			tolen--;  in udf_pc_to_char()
94 		p[-1] = '\0';  in udf_pc_to_char()
102 	struct page *page = &folio->page;  in udf_symlink_filler()
103 	struct inode *inode = page->mapping->host;  in udf_symlink_filler()
111 	if (inode->i_size > inode->i_sb->s_blocksize) {  in udf_symlink_filler()
112 		err = -ENAMETOOLONG;  in udf_symlink_filler()
116 	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {  in udf_symlink_filler()
117 		symlink = iinfo->i_data + iinfo->i_lenEAttr;  in udf_symlink_filler()
122 				err = -EFSCORRUPTED;  in udf_symlink_filler()
125 		symlink = bh->b_data;  in udf_symlink_filler()
128 	err = udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p, PAGE_SIZE);  in udf_symlink_filler()
148 	struct dentry *dentry = path->dentry;  in udf_symlink_getattr()
153 	page = read_mapping_page(inode->i_mapping, 0, NULL);  in udf_symlink_getattr()
157 	 * UDF uses non-trivial encoding of symlinks so i_size does not match  in udf_symlink_getattr()
165 	stat->size = strlen(page_address(page));  in udf_symlink_getattr()