19 bool is_bnode_offset_valid(struct hfs_bnode *node, int off)  in is_bnode_offset_valid()  argument
21 	bool is_valid = off < node->tree->node_size;  in is_bnode_offset_valid()
28 		       node->tree->node_size, off);  in is_bnode_offset_valid()
35 int check_and_correct_requested_length(struct hfs_bnode *node, int off, int len)  in check_and_correct_requested_length()  argument
39 	if (!is_bnode_offset_valid(node, off))  in check_and_correct_requested_length()
44 	if ((off + len) > node_size) {  in check_and_correct_requested_length()
45 		int new_len = (int)node_size - off;  in check_and_correct_requested_length()
52 		       node->tree->node_size, off, len, new_len);  in check_and_correct_requested_length()
60 void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len)  in hfs_bnode_read()  argument
67 	if (!is_bnode_offset_valid(node, off))  in hfs_bnode_read()
75 		       node->tree->node_size, off, len);  in hfs_bnode_read()
79 	len = check_and_correct_requested_length(node, off, len);  in hfs_bnode_read()
81 	off += node->page_offset;  in hfs_bnode_read()
82 	pagenum = off >> PAGE_SHIFT;  in hfs_bnode_read()
83 	off &= ~PAGE_MASK; /* compute page offset for the first page */  in hfs_bnode_read()
89 		bytes_to_read = min_t(int, len - bytes_read, PAGE_SIZE - off);  in hfs_bnode_read()
91 		memcpy_from_page(buf + bytes_read, page, off, bytes_to_read);  in hfs_bnode_read()
94 		off = 0; /* page offset only applies to the first page */  in hfs_bnode_read()
98 u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off)  in hfs_bnode_read_u16()  argument
102 	hfs_bnode_read(node, &data, off, 2);  in hfs_bnode_read_u16()
106 u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off)  in hfs_bnode_read_u8()  argument
110 	hfs_bnode_read(node, &data, off, 1);  in hfs_bnode_read_u8()
114 void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off)  in hfs_bnode_read_key()  argument
122 		key_len = hfs_bnode_read_u8(node, off) + 1;  in hfs_bnode_read_key()
132 	hfs_bnode_read(node, key, off, key_len);  in hfs_bnode_read_key()
135 void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len)  in hfs_bnode_write()  argument
139 	if (!is_bnode_offset_valid(node, off))  in hfs_bnode_write()
147 		       node->tree->node_size, off, len);  in hfs_bnode_write()
151 	len = check_and_correct_requested_length(node, off, len);  in hfs_bnode_write()
153 	off += node->page_offset;  in hfs_bnode_write()
156 	memcpy_to_page(page, off, buf, len);  in hfs_bnode_write()
160 void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data)  in hfs_bnode_write_u16()  argument
164 	hfs_bnode_write(node, &v, off, 2);  in hfs_bnode_write_u16()
167 void hfs_bnode_write_u8(struct hfs_bnode *node, int off, u8 data)  in hfs_bnode_write_u8()  argument
170 	hfs_bnode_write(node, &data, off, 1);  in hfs_bnode_write_u8()
173 void hfs_bnode_clear(struct hfs_bnode *node, int off, int len)  in hfs_bnode_clear()  argument
177 	if (!is_bnode_offset_valid(node, off))  in hfs_bnode_clear()
185 		       node->tree->node_size, off, len);  in hfs_bnode_clear()
189 	len = check_and_correct_requested_length(node, off, len);  in hfs_bnode_clear()
191 	off += node->page_offset;  in hfs_bnode_clear()
194 	memzero_page(page, off, len);  in hfs_bnode_clear()
244 	int i, off, key_off;  in hfs_bnode_dump()  local
252 	off = node->tree->node_size - 2;  in hfs_bnode_dump()
253 	for (i = be16_to_cpu(desc.num_recs); i >= 0; off -= 2, i--) {  in hfs_bnode_dump()
254 		key_off = hfs_bnode_read_u16(node, off);  in hfs_bnode_dump()
348 	loff_t off;  in __hfs_bnode_create()  local
384 	off = (loff_t)cnid * tree->node_size;  in __hfs_bnode_create()
385 	block = off >> PAGE_SHIFT;  in __hfs_bnode_create()
386 	node->page_offset = off & ~PAGE_MASK;  in __hfs_bnode_create()
419 	int i, rec_off, off, next_off;  in hfs_bnode_find()  local
469 	off = hfs_bnode_read_u16(node, rec_off);  in hfs_bnode_find()
470 	if (off != sizeof(struct hfs_bnode_desc))  in hfs_bnode_find()
472 	for (i = 1; i <= node->num_recs; off = next_off, i++) {  in hfs_bnode_find()
475 		if (next_off <= off ||  in hfs_bnode_find()
479 		entry_size = next_off - off;  in hfs_bnode_find()
483 		key_size = hfs_bnode_read_u8(node, off) + 1;  in hfs_bnode_find()