fs/btrfs/accessors.c

12 static bool check_setget_bounds(const struct extent_buffer *eb,
17 	if (unlikely(member_offset + size > eb->len)) {
18 		btrfs_warn(eb->fs_info,
19 		"bad eb member %s: ptr 0x%lx start %llu member offset %lu size %d",
20 			(member_offset > eb->len ? "start" : "end"),
21 			(unsigned long)ptr, eb->start, member_offset, size);
28 void btrfs_init_map_token(struct btrfs_map_token *token, struct extent_buffer *eb)
30 	token->eb = eb;
31 	token->kaddr = folio_address(eb->folios[0]);
64 	const unsigned long idx = get_eb_folio_index(token->eb, member_offset); \
65 	const unsigned long oil = get_eb_offset_in_folio(token->eb,	\
67 	const int unit_size = token->eb->folio_size;			\
68 	const int unit_shift = token->eb->folio_shift;			\
75 	ASSERT(check_setget_bounds(token->eb, ptr, off, size));		\
80 	token->kaddr = folio_address(token->eb->folios[idx]);		\
86 	token->kaddr = folio_address(token->eb->folios[idx + 1]);	\
91 u##bits btrfs_get_##bits(const struct extent_buffer *eb,		\
95 	const unsigned long idx = get_eb_folio_index(eb, member_offset);\
96 	const unsigned long oil = get_eb_offset_in_folio(eb,		\
98 	const int unit_size = eb->folio_size;				\
99 	char *kaddr = folio_address(eb->folios[idx]);			\
104 	ASSERT(check_setget_bounds(eb, ptr, off, size));		\
109 	kaddr = folio_address(eb->folios[idx + 1]);			\
118 	const unsigned long idx = get_eb_folio_index(token->eb, member_offset); \
119 	const unsigned long oil = get_eb_offset_in_folio(token->eb,	\
121 	const int unit_size = token->eb->folio_size;			\
122 	const int unit_shift = token->eb->folio_shift;			\
129 	ASSERT(check_setget_bounds(token->eb, ptr, off, size));		\
135 	token->kaddr = folio_address(token->eb->folios[idx]);		\
144 	token->kaddr = folio_address(token->eb->folios[idx + 1]);	\
148 void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr,	\
152 	const unsigned long idx = get_eb_folio_index(eb, member_offset);\
153 	const unsigned long oil = get_eb_offset_in_folio(eb,		\
155 	const int unit_size = eb->folio_size;				\
156 	char *kaddr = folio_address(eb->folios[idx]);			\
161 	ASSERT(check_setget_bounds(eb, ptr, off, size));		\
170 	kaddr = folio_address(eb->folios[idx + 1]);			\
179 void btrfs_node_key(const struct extent_buffer *eb,
182 	unsigned long ptr = btrfs_node_key_ptr_offset(eb, nr);
183 	read_eb_member(eb, (struct btrfs_key_ptr *)ptr,