53 			struct inode *inode, struct rock_state *rs)  in setup_rock_ridge()  argument
55 	rs->len = sizeof(struct iso_directory_record) + de->name_len[0];  in setup_rock_ridge()
56 	if (rs->len & 1)  in setup_rock_ridge()
57 		(rs->len)++;  in setup_rock_ridge()
58 	rs->chr = (unsigned char *)de + rs->len;  in setup_rock_ridge()
59 	rs->len = *((unsigned char *)de) - rs->len;  in setup_rock_ridge()
60 	if (rs->len < 0)  in setup_rock_ridge()
61 		rs->len = 0;  in setup_rock_ridge()
64 		rs->len -= ISOFS_SB(inode->i_sb)->s_rock_offset;  in setup_rock_ridge()
65 		rs->chr += ISOFS_SB(inode->i_sb)->s_rock_offset;  in setup_rock_ridge()
66 		if (rs->len < 0)  in setup_rock_ridge()
67 			rs->len = 0;  in setup_rock_ridge()
71 static void init_rock_state(struct rock_state *rs, struct inode *inode)  in init_rock_state()  argument
73 	memset(rs, 0, sizeof(*rs));  in init_rock_state()
74 	rs->inode = inode;  in init_rock_state()
84 static int rock_continue(struct rock_state *rs)  in rock_continue()  argument
87 	int blocksize = 1 << rs->inode->i_blkbits;  in rock_continue()
90 	kfree(rs->buffer);  in rock_continue()
91 	rs->buffer = NULL;  in rock_continue()
93 	if ((unsigned)rs->cont_offset > blocksize - min_de_size ||  in rock_continue()
94 	    (unsigned)rs->cont_size > blocksize ||  in rock_continue()
95 	    (unsigned)(rs->cont_offset + rs->cont_size) > blocksize) {  in rock_continue()
98 			rs->cont_extent, rs->cont_offset, rs->cont_size);  in rock_continue()
103 	if (rs->cont_extent) {  in rock_continue()
106 		rs->buffer = kmalloc(rs->cont_size, GFP_KERNEL);  in rock_continue()
107 		if (!rs->buffer) {  in rock_continue()
112 		if (++rs->cont_loops >= RR_MAX_CE_ENTRIES)  in rock_continue()
114 		bh = sb_bread(rs->inode->i_sb, rs->cont_extent);  in rock_continue()
116 			memcpy(rs->buffer, bh->b_data + rs->cont_offset,  in rock_continue()
117 					rs->cont_size);  in rock_continue()
119 			rs->chr = rs->buffer;  in rock_continue()
120 			rs->len = rs->cont_size;  in rock_continue()
121 			rs->cont_extent = 0;  in rock_continue()
122 			rs->cont_size = 0;  in rock_continue()
123 			rs->cont_offset = 0;  in rock_continue()
129 	kfree(rs->buffer);  in rock_continue()
130 	rs->buffer = NULL;  in rock_continue()
138 static int rock_check_overflow(struct rock_state *rs, int sig)  in rock_check_overflow()  argument
184 	if (len > rs->len) {  in rock_check_overflow()
188 				sig, len, rs->len);  in rock_check_overflow()
200 	struct rock_state rs;  in get_rock_ridge_filename()  local
213 	init_rock_state(&rs, inode);  in get_rock_ridge_filename()
214 	setup_rock_ridge(de, inode, &rs);  in get_rock_ridge_filename()
217 	while (rs.len > 2) { /* There may be one byte for padding somewhere */  in get_rock_ridge_filename()
218 		rr = (struct rock_ridge *)rs.chr;  in get_rock_ridge_filename()
226 		sig = isonum_721(rs.chr);  in get_rock_ridge_filename()
227 		if (rock_check_overflow(&rs, sig))  in get_rock_ridge_filename()
229 		rs.chr += rr->len;  in get_rock_ridge_filename()
230 		rs.len -= rr->len;  in get_rock_ridge_filename()
235 		if (rs.len < 0)  in get_rock_ridge_filename()
248 			rs.cont_extent = isonum_733(rr->u.CE.extent);  in get_rock_ridge_filename()
249 			rs.cont_offset = isonum_733(rr->u.CE.offset);  in get_rock_ridge_filename()
250 			rs.cont_size = isonum_733(rr->u.CE.size);  in get_rock_ridge_filename()
285 			kfree(rs.buffer);  in get_rock_ridge_filename()
291 	ret = rock_continue(&rs);  in get_rock_ridge_filename()
297 	kfree(rs.buffer);  in get_rock_ridge_filename()
317 	struct rock_state rs;  in parse_rock_ridge_inode_internal()  local
323 	init_rock_state(&rs, inode);  in parse_rock_ridge_inode_internal()
324 	setup_rock_ridge(de, inode, &rs);  in parse_rock_ridge_inode_internal()
326 		rs.chr += 14;  in parse_rock_ridge_inode_internal()
327 		rs.len -= 14;  in parse_rock_ridge_inode_internal()
328 		if (rs.len < 0)  in parse_rock_ridge_inode_internal()
329 			rs.len = 0;  in parse_rock_ridge_inode_internal()
333 	while (rs.len > 2) { /* There may be one byte for padding somewhere */  in parse_rock_ridge_inode_internal()
334 		rr = (struct rock_ridge *)rs.chr;  in parse_rock_ridge_inode_internal()
342 		sig = isonum_721(rs.chr);  in parse_rock_ridge_inode_internal()
343 		if (rock_check_overflow(&rs, sig))  in parse_rock_ridge_inode_internal()
345 		rs.chr += rr->len;  in parse_rock_ridge_inode_internal()
346 		rs.len -= rr->len;  in parse_rock_ridge_inode_internal()
351 		if (rs.len < 0)  in parse_rock_ridge_inode_internal()
367 			rs.cont_extent = isonum_733(rr->u.CE.extent);  in parse_rock_ridge_inode_internal()
368 			rs.cont_offset = isonum_733(rr->u.CE.offset);  in parse_rock_ridge_inode_internal()
369 			rs.cont_size = isonum_733(rr->u.CE.size);  in parse_rock_ridge_inode_internal()
589 	ret = rock_continue(&rs);  in parse_rock_ridge_inode_internal()
595 	kfree(rs.buffer);  in parse_rock_ridge_inode_internal()
706 	struct rock_state rs;  in rock_ridge_symlink_readpage()  local
712 	init_rock_state(&rs, inode);  in rock_ridge_symlink_readpage()
734 	setup_rock_ridge(raw_de, inode, &rs);  in rock_ridge_symlink_readpage()
737 	while (rs.len > 2) { /* There may be one byte for padding somewhere */  in rock_ridge_symlink_readpage()
738 		rr = (struct rock_ridge *)rs.chr;  in rock_ridge_symlink_readpage()
741 		sig = isonum_721(rs.chr);  in rock_ridge_symlink_readpage()
742 		if (rock_check_overflow(&rs, sig))  in rock_ridge_symlink_readpage()
744 		rs.chr += rr->len;  in rock_ridge_symlink_readpage()
745 		rs.len -= rr->len;  in rock_ridge_symlink_readpage()
746 		if (rs.len < 0)  in rock_ridge_symlink_readpage()
766 			rs.cont_extent = isonum_733(rr->u.CE.extent);  in rock_ridge_symlink_readpage()
767 			rs.cont_offset = isonum_733(rr->u.CE.offset);  in rock_ridge_symlink_readpage()
768 			rs.cont_size = isonum_733(rr->u.CE.size);  in rock_ridge_symlink_readpage()
773 	ret = rock_continue(&rs);  in rock_ridge_symlink_readpage()
790 	kfree(rs.buffer);  in rock_ridge_symlink_readpage()