1 // SPDX-License-Identifier: GPL-2.0
7  *  (C) 1991  Linus Torvalds - minix filesystem
24 	if (likely(!dentry->d_op))  in isofs_cmp()
25 		return dentry->d_name.len != dlen || memcmp(dentry->d_name.name, compare, dlen);  in isofs_cmp()
26 	return dentry->d_op->d_compare(NULL, dentry->d_name.len, dentry->d_name.name, &qstr);  in isofs_cmp()
42 	unsigned long block, f_pos, offset, block_saved, offset_saved;  in isofs_find_entry()  local
44 	struct isofs_sb_info *sbi = ISOFS_SB(dir->i_sb);  in isofs_find_entry()
46 	if (!ISOFS_I(dir)->i_first_extent)  in isofs_find_entry()
50 	offset = 0;  in isofs_find_entry()
51 	block = 0;  in isofs_find_entry()
53 	while (f_pos < dir->i_size) {  in isofs_find_entry()
59 			bh = isofs_bread(dir, block);  in isofs_find_entry()
64 		de = (struct iso_directory_record *) (bh->b_data + offset);  in isofs_find_entry()
70 			f_pos = (f_pos + ISOFS_BLOCK_SIZE) & ~(ISOFS_BLOCK_SIZE - 1);  in isofs_find_entry()
71 			block = f_pos >> bufbits;  in isofs_find_entry()
72 			offset = 0;  in isofs_find_entry()
76 		block_saved = bh->b_blocknr;  in isofs_find_entry()
77 		offset_saved = offset;  in isofs_find_entry()
78 		offset += de_len;  in isofs_find_entry()
82 		if (offset >= bufsize) {  in isofs_find_entry()
83 			int slop = bufsize - offset + de_len;  in isofs_find_entry()
85 			offset &= bufsize - 1;  in isofs_find_entry()
86 			block++;  in isofs_find_entry()
89 			if (offset) {  in isofs_find_entry()
90 				bh = isofs_bread(dir, block);  in isofs_find_entry()
93 				memcpy((void *) tmpde + slop, bh->b_data, offset);  in isofs_find_entry()
98 		dlen = de->name_len[0];  in isofs_find_entry()
99 		dpnt = de->name;  in isofs_find_entry()
103 			       " in block %lu of inode %lu\n", block,  in isofs_find_entry()
104 			       dir->i_ino);  in isofs_find_entry()
109 		if (sbi->s_rock &&  in isofs_find_entry()
111 			dlen = i;	/* possibly -1 */  in isofs_find_entry()
114 		} else if (sbi->s_joliet_level) {  in isofs_find_entry()
118 		} else if (sbi->s_mapping == 'a') {  in isofs_find_entry()
121 		} else if (sbi->s_mapping == 'n') {  in isofs_find_entry()
132 			(!sbi->s_hide ||  in isofs_find_entry()
133 				(!(de->flags[-sbi->s_high_sierra] & 1))) &&  in isofs_find_entry()
134 			(sbi->s_showassoc ||  in isofs_find_entry()
135 				(!(de->flags[-sbi->s_high_sierra] & 4)))) {  in isofs_find_entry()
156 	unsigned long block;  in isofs_lookup()  local
157 	unsigned long offset;  in isofs_lookup()  local
163 		return ERR_PTR(-ENOMEM);  in isofs_lookup()
166 				&block, &offset,  in isofs_lookup()
171 	inode = found ? isofs_iget(dir->i_sb, block, offset) : NULL;  in isofs_lookup()