1	/* SPDX-License-Identifier: GPL-2.0 */
2
3	#ifndef BTRFS_ACCESSORS_H
4	#define BTRFS_ACCESSORS_H
5
6	#include <linux/stddef.h>
7	#include <asm/unaligned.h>
8
9	struct btrfs_map_token {
10	struct extent_buffer *eb;
11	char *kaddr;
12	unsigned long offset;
13	};
14
15	void btrfs_init_map_token(struct btrfs_map_token *token, struct extent_buffer *eb);
16
17	/*
18	* Some macros to generate set/get functions for the struct fields. This
19	* assumes there is a lefoo_to_cpu for every type, so lets make a simple one
20	* for u8:
21	*/
22	#define le8_to_cpu(v) (v)
23	#define cpu_to_le8(v) (v)
24	#define __le8 u8
25
26	static inline u8 get_unaligned_le8(const void *p)
27	{
28	return *(u8 *)p;
29	}
30
31	static inline void put_unaligned_le8(u8 val, void *p)
32	{
33	*(u8 *)p = val;
34	}
35
36	#define read_eb_member(eb, ptr, type, member, result) (\
37	read_extent_buffer(eb, (char *)(result), \
38	((unsigned long)(ptr)) + \
39	offsetof(type, member), \
40	sizeof_field(type, member)))
41
42	#define write_eb_member(eb, ptr, type, member, result) (\
43	write_extent_buffer(eb, (char *)(result), \
44	((unsigned long)(ptr)) + \
45	offsetof(type, member), \
46	sizeof_field(type, member)))
47
48	#define DECLARE_BTRFS_SETGET_BITS(bits) \
49	u##bits btrfs_get_token_##bits(struct btrfs_map_token *token, \
50	const void *ptr, unsigned long off); \
51	void btrfs_set_token_##bits(struct btrfs_map_token *token, \
52	const void *ptr, unsigned long off, \
53	u##bits val); \
54	u##bits btrfs_get_##bits(const struct extent_buffer *eb, \
55	const void *ptr, unsigned long off); \
56	void btrfs_set_##bits(const struct extent_buffer *eb, void *ptr, \
57	unsigned long off, u##bits val);
58
59	DECLARE_BTRFS_SETGET_BITS(8)
60	DECLARE_BTRFS_SETGET_BITS(16)
61	DECLARE_BTRFS_SETGET_BITS(32)
62	DECLARE_BTRFS_SETGET_BITS(64)
63
64	#define BTRFS_SETGET_FUNCS(name, type, member, bits) \
65	static inline u##bits btrfs_##name(const struct extent_buffer *eb, \
66	const type *s) \
67	{ \
68	static_assert(sizeof(u##bits) == sizeof_field(type, member)); \
69	return btrfs_get_##bits(eb, s, offsetof(type, member)); \
70	} \
71	static inline void btrfs_set_##name(const struct extent_buffer *eb, type *s, \
72	u##bits val) \
73	{ \
74	static_assert(sizeof(u##bits) == sizeof_field(type, member)); \
75	btrfs_set_##bits(eb, s, offsetof(type, member), val); \
76	} \
77	static inline u##bits btrfs_token_##name(struct btrfs_map_token *token, \
78	const type *s) \
79	{ \
80	static_assert(sizeof(u##bits) == sizeof_field(type, member)); \
81	return btrfs_get_token_##bits(token, s, offsetof(type, member));\
82	} \
83	static inline void btrfs_set_token_##name(struct btrfs_map_token *token,\
84	type *s, u##bits val) \
85	{ \
86	static_assert(sizeof(u##bits) == sizeof_field(type, member)); \
87	btrfs_set_token_##bits(token, s, offsetof(type, member), val); \
88	}
89
90	#define BTRFS_SETGET_HEADER_FUNCS(name, type, member, bits) \
91	static inline u##bits btrfs_##name(const struct extent_buffer *eb) \
92	{ \
93	const type *p = page_address(eb->pages[0]) + \
94	offset_in_page(eb->start); \
95	return get_unaligned_le##bits(&p->member); \
96	} \
97	static inline void btrfs_set_##name(const struct extent_buffer *eb, \
98	u##bits val) \
99	{ \
100	type *p = page_address(eb->pages[0]) + offset_in_page(eb->start); \
101	put_unaligned_le##bits(val, &p->member); \
102	}
103
104	#define BTRFS_SETGET_STACK_FUNCS(name, type, member, bits) \
105	static inline u##bits btrfs_##name(const type *s) \
106	{ \
107	return get_unaligned_le##bits(&s->member); \
108	} \
109	static inline void btrfs_set_##name(type *s, u##bits val) \
110	{ \
111	put_unaligned_le##bits(val, &s->member); \
112	}
113
114	static inline u64 btrfs_device_total_bytes(const struct extent_buffer *eb,
115	struct btrfs_dev_item *s)
116	{
117	static_assert(sizeof(u64) == sizeof_field(struct btrfs_dev_item, total_bytes));
118	return btrfs_get_64(eb, ptr: s, offsetof(struct btrfs_dev_item, total_bytes));
119	}
120	static inline void btrfs_set_device_total_bytes(const struct extent_buffer *eb,
121	struct btrfs_dev_item *s,
122	u64 val)
123	{
124	static_assert(sizeof(u64) == sizeof_field(struct btrfs_dev_item, total_bytes));
125	WARN_ON(!IS_ALIGNED(val, eb->fs_info->sectorsize));
126	btrfs_set_64(eb, ptr: s, offsetof(struct btrfs_dev_item, total_bytes), val);
127	}
128
129	BTRFS_SETGET_FUNCS(device_type, struct btrfs_dev_item, type, 64);
130	BTRFS_SETGET_FUNCS(device_bytes_used, struct btrfs_dev_item, bytes_used, 64);
131	BTRFS_SETGET_FUNCS(device_io_align, struct btrfs_dev_item, io_align, 32);
132	BTRFS_SETGET_FUNCS(device_io_width, struct btrfs_dev_item, io_width, 32);
133	BTRFS_SETGET_FUNCS(device_start_offset, struct btrfs_dev_item, start_offset, 64);
134	BTRFS_SETGET_FUNCS(device_sector_size, struct btrfs_dev_item, sector_size, 32);
135	BTRFS_SETGET_FUNCS(device_id, struct btrfs_dev_item, devid, 64);
136	BTRFS_SETGET_FUNCS(device_group, struct btrfs_dev_item, dev_group, 32);
137	BTRFS_SETGET_FUNCS(device_seek_speed, struct btrfs_dev_item, seek_speed, 8);
138	BTRFS_SETGET_FUNCS(device_bandwidth, struct btrfs_dev_item, bandwidth, 8);
139	BTRFS_SETGET_FUNCS(device_generation, struct btrfs_dev_item, generation, 64);
140
141	BTRFS_SETGET_STACK_FUNCS(stack_device_type, struct btrfs_dev_item, type, 64);
142	BTRFS_SETGET_STACK_FUNCS(stack_device_total_bytes, struct btrfs_dev_item,
143	total_bytes, 64);
144	BTRFS_SETGET_STACK_FUNCS(stack_device_bytes_used, struct btrfs_dev_item,
145	bytes_used, 64);
146	BTRFS_SETGET_STACK_FUNCS(stack_device_io_align, struct btrfs_dev_item,
147	io_align, 32);
148	BTRFS_SETGET_STACK_FUNCS(stack_device_io_width, struct btrfs_dev_item,
149	io_width, 32);
150	BTRFS_SETGET_STACK_FUNCS(stack_device_sector_size, struct btrfs_dev_item,
151	sector_size, 32);
152	BTRFS_SETGET_STACK_FUNCS(stack_device_id, struct btrfs_dev_item, devid, 64);
153	BTRFS_SETGET_STACK_FUNCS(stack_device_group, struct btrfs_dev_item, dev_group, 32);
154	BTRFS_SETGET_STACK_FUNCS(stack_device_seek_speed, struct btrfs_dev_item,
155	seek_speed, 8);
156	BTRFS_SETGET_STACK_FUNCS(stack_device_bandwidth, struct btrfs_dev_item,
157	bandwidth, 8);
158	BTRFS_SETGET_STACK_FUNCS(stack_device_generation, struct btrfs_dev_item,
159	generation, 64);
160
161	static inline unsigned long btrfs_device_uuid(struct btrfs_dev_item *d)
162	{
163	return (unsigned long)d + offsetof(struct btrfs_dev_item, uuid);
164	}
165
166	static inline unsigned long btrfs_device_fsid(struct btrfs_dev_item *d)
167	{
168	return (unsigned long)d + offsetof(struct btrfs_dev_item, fsid);
169	}
170
171	BTRFS_SETGET_FUNCS(chunk_length, struct btrfs_chunk, length, 64);
172	BTRFS_SETGET_FUNCS(chunk_owner, struct btrfs_chunk, owner, 64);
173	BTRFS_SETGET_FUNCS(chunk_stripe_len, struct btrfs_chunk, stripe_len, 64);
174	BTRFS_SETGET_FUNCS(chunk_io_align, struct btrfs_chunk, io_align, 32);
175	BTRFS_SETGET_FUNCS(chunk_io_width, struct btrfs_chunk, io_width, 32);
176	BTRFS_SETGET_FUNCS(chunk_sector_size, struct btrfs_chunk, sector_size, 32);
177	BTRFS_SETGET_FUNCS(chunk_type, struct btrfs_chunk, type, 64);
178	BTRFS_SETGET_FUNCS(chunk_num_stripes, struct btrfs_chunk, num_stripes, 16);
179	BTRFS_SETGET_FUNCS(chunk_sub_stripes, struct btrfs_chunk, sub_stripes, 16);
180	BTRFS_SETGET_FUNCS(stripe_devid, struct btrfs_stripe, devid, 64);
181	BTRFS_SETGET_FUNCS(stripe_offset, struct btrfs_stripe, offset, 64);
182
183	static inline char *btrfs_stripe_dev_uuid(struct btrfs_stripe *s)
184	{
185	return (char *)s + offsetof(struct btrfs_stripe, dev_uuid);
186	}
187
188	BTRFS_SETGET_STACK_FUNCS(stack_chunk_length, struct btrfs_chunk, length, 64);
189	BTRFS_SETGET_STACK_FUNCS(stack_chunk_owner, struct btrfs_chunk, owner, 64);
190	BTRFS_SETGET_STACK_FUNCS(stack_chunk_stripe_len, struct btrfs_chunk,
191	stripe_len, 64);
192	BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_align, struct btrfs_chunk, io_align, 32);
193	BTRFS_SETGET_STACK_FUNCS(stack_chunk_io_width, struct btrfs_chunk, io_width, 32);
194	BTRFS_SETGET_STACK_FUNCS(stack_chunk_sector_size, struct btrfs_chunk,
195	sector_size, 32);
196	BTRFS_SETGET_STACK_FUNCS(stack_chunk_type, struct btrfs_chunk, type, 64);
197	BTRFS_SETGET_STACK_FUNCS(stack_chunk_num_stripes, struct btrfs_chunk,
198	num_stripes, 16);
199	BTRFS_SETGET_STACK_FUNCS(stack_chunk_sub_stripes, struct btrfs_chunk,
200	sub_stripes, 16);
201	BTRFS_SETGET_STACK_FUNCS(stack_stripe_devid, struct btrfs_stripe, devid, 64);
202	BTRFS_SETGET_STACK_FUNCS(stack_stripe_offset, struct btrfs_stripe, offset, 64);
203
204	static inline struct btrfs_stripe *btrfs_stripe_nr(struct btrfs_chunk *c, int nr)
205	{
206	unsigned long offset = (unsigned long)c;
207
208	offset += offsetof(struct btrfs_chunk, stripe);
209	offset += nr * sizeof(struct btrfs_stripe);
210	return (struct btrfs_stripe *)offset;
211	}
212
213	static inline char *btrfs_stripe_dev_uuid_nr(struct btrfs_chunk *c, int nr)
214	{
215	return btrfs_stripe_dev_uuid(s: btrfs_stripe_nr(c, nr));
216	}
217
218	static inline u64 btrfs_stripe_offset_nr(const struct extent_buffer *eb,
219	struct btrfs_chunk *c, int nr)
220	{
221	return btrfs_stripe_offset(eb, s: btrfs_stripe_nr(c, nr));
222	}
223
224	static inline void btrfs_set_stripe_offset_nr(struct extent_buffer *eb,
225	struct btrfs_chunk *c, int nr,
226	u64 val)
227	{
228	btrfs_set_stripe_offset(eb, s: btrfs_stripe_nr(c, nr), val);
229	}
230
231	static inline u64 btrfs_stripe_devid_nr(const struct extent_buffer *eb,
232	struct btrfs_chunk *c, int nr)
233	{
234	return btrfs_stripe_devid(eb, s: btrfs_stripe_nr(c, nr));
235	}
236
237	static inline void btrfs_set_stripe_devid_nr(struct extent_buffer *eb,
238	struct btrfs_chunk *c, int nr,
239	u64 val)
240	{
241	btrfs_set_stripe_devid(eb, s: btrfs_stripe_nr(c, nr), val);
242	}
243
244	/* struct btrfs_block_group_item */
245	BTRFS_SETGET_STACK_FUNCS(stack_block_group_used, struct btrfs_block_group_item,
246	used, 64);
247	BTRFS_SETGET_FUNCS(block_group_used, struct btrfs_block_group_item, used, 64);
248	BTRFS_SETGET_STACK_FUNCS(stack_block_group_chunk_objectid,
249	struct btrfs_block_group_item, chunk_objectid, 64);
250
251	BTRFS_SETGET_FUNCS(block_group_chunk_objectid,
252	struct btrfs_block_group_item, chunk_objectid, 64);
253	BTRFS_SETGET_FUNCS(block_group_flags, struct btrfs_block_group_item, flags, 64);
254	BTRFS_SETGET_STACK_FUNCS(stack_block_group_flags,
255	struct btrfs_block_group_item, flags, 64);
256
257	/* struct btrfs_free_space_info */
258	BTRFS_SETGET_FUNCS(free_space_extent_count, struct btrfs_free_space_info,
259	extent_count, 32);
260	BTRFS_SETGET_FUNCS(free_space_flags, struct btrfs_free_space_info, flags, 32);
261
262	/* struct btrfs_inode_ref */
263	BTRFS_SETGET_FUNCS(inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
264	BTRFS_SETGET_FUNCS(inode_ref_index, struct btrfs_inode_ref, index, 64);
265	BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_name_len, struct btrfs_inode_ref, name_len, 16);
266	BTRFS_SETGET_STACK_FUNCS(stack_inode_ref_index, struct btrfs_inode_ref, index, 64);
267
268	/* struct btrfs_inode_extref */
269	BTRFS_SETGET_FUNCS(inode_extref_parent, struct btrfs_inode_extref,
270	parent_objectid, 64);
271	BTRFS_SETGET_FUNCS(inode_extref_name_len, struct btrfs_inode_extref,
272	name_len, 16);
273	BTRFS_SETGET_FUNCS(inode_extref_index, struct btrfs_inode_extref, index, 64);
274
275	/* struct btrfs_inode_item */
276	BTRFS_SETGET_FUNCS(inode_generation, struct btrfs_inode_item, generation, 64);
277	BTRFS_SETGET_FUNCS(inode_sequence, struct btrfs_inode_item, sequence, 64);
278	BTRFS_SETGET_FUNCS(inode_transid, struct btrfs_inode_item, transid, 64);
279	BTRFS_SETGET_FUNCS(inode_size, struct btrfs_inode_item, size, 64);
280	BTRFS_SETGET_FUNCS(inode_nbytes, struct btrfs_inode_item, nbytes, 64);
281	BTRFS_SETGET_FUNCS(inode_block_group, struct btrfs_inode_item, block_group, 64);
282	BTRFS_SETGET_FUNCS(inode_nlink, struct btrfs_inode_item, nlink, 32);
283	BTRFS_SETGET_FUNCS(inode_uid, struct btrfs_inode_item, uid, 32);
284	BTRFS_SETGET_FUNCS(inode_gid, struct btrfs_inode_item, gid, 32);
285	BTRFS_SETGET_FUNCS(inode_mode, struct btrfs_inode_item, mode, 32);
286	BTRFS_SETGET_FUNCS(inode_rdev, struct btrfs_inode_item, rdev, 64);
287	BTRFS_SETGET_FUNCS(inode_flags, struct btrfs_inode_item, flags, 64);
288	BTRFS_SETGET_STACK_FUNCS(stack_inode_generation, struct btrfs_inode_item,
289	generation, 64);
290	BTRFS_SETGET_STACK_FUNCS(stack_inode_sequence, struct btrfs_inode_item,
291	sequence, 64);
292	BTRFS_SETGET_STACK_FUNCS(stack_inode_transid, struct btrfs_inode_item,
293	transid, 64);
294	BTRFS_SETGET_STACK_FUNCS(stack_inode_size, struct btrfs_inode_item, size, 64);
295	BTRFS_SETGET_STACK_FUNCS(stack_inode_nbytes, struct btrfs_inode_item, nbytes, 64);
296	BTRFS_SETGET_STACK_FUNCS(stack_inode_block_group, struct btrfs_inode_item,
297	block_group, 64);
298	BTRFS_SETGET_STACK_FUNCS(stack_inode_nlink, struct btrfs_inode_item, nlink, 32);
299	BTRFS_SETGET_STACK_FUNCS(stack_inode_uid, struct btrfs_inode_item, uid, 32);
300	BTRFS_SETGET_STACK_FUNCS(stack_inode_gid, struct btrfs_inode_item, gid, 32);
301	BTRFS_SETGET_STACK_FUNCS(stack_inode_mode, struct btrfs_inode_item, mode, 32);
302	BTRFS_SETGET_STACK_FUNCS(stack_inode_rdev, struct btrfs_inode_item, rdev, 64);
303	BTRFS_SETGET_STACK_FUNCS(stack_inode_flags, struct btrfs_inode_item, flags, 64);
304	BTRFS_SETGET_FUNCS(timespec_sec, struct btrfs_timespec, sec, 64);
305	BTRFS_SETGET_FUNCS(timespec_nsec, struct btrfs_timespec, nsec, 32);
306	BTRFS_SETGET_STACK_FUNCS(stack_timespec_sec, struct btrfs_timespec, sec, 64);
307	BTRFS_SETGET_STACK_FUNCS(stack_timespec_nsec, struct btrfs_timespec, nsec, 32);
308
309	BTRFS_SETGET_FUNCS(stripe_extent_encoding, struct btrfs_stripe_extent, encoding, 8);
310	BTRFS_SETGET_FUNCS(raid_stride_devid, struct btrfs_raid_stride, devid, 64);
311	BTRFS_SETGET_FUNCS(raid_stride_physical, struct btrfs_raid_stride, physical, 64);
312	BTRFS_SETGET_STACK_FUNCS(stack_stripe_extent_encoding,
313	struct btrfs_stripe_extent, encoding, 8);
314	BTRFS_SETGET_STACK_FUNCS(stack_raid_stride_devid, struct btrfs_raid_stride, devid, 64);
315	BTRFS_SETGET_STACK_FUNCS(stack_raid_stride_physical, struct btrfs_raid_stride, physical, 64);
316
317	/* struct btrfs_dev_extent */
318	BTRFS_SETGET_FUNCS(dev_extent_chunk_tree, struct btrfs_dev_extent, chunk_tree, 64);
319	BTRFS_SETGET_FUNCS(dev_extent_chunk_objectid, struct btrfs_dev_extent,
320	chunk_objectid, 64);
321	BTRFS_SETGET_FUNCS(dev_extent_chunk_offset, struct btrfs_dev_extent,
322	chunk_offset, 64);
323	BTRFS_SETGET_FUNCS(dev_extent_length, struct btrfs_dev_extent, length, 64);
324	BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_tree, struct btrfs_dev_extent,
325	chunk_tree, 64);
326	BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_objectid, struct btrfs_dev_extent,
327	chunk_objectid, 64);
328	BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_chunk_offset, struct btrfs_dev_extent,
329	chunk_offset, 64);
330	BTRFS_SETGET_STACK_FUNCS(stack_dev_extent_length, struct btrfs_dev_extent, length, 64);
331
332	BTRFS_SETGET_FUNCS(extent_refs, struct btrfs_extent_item, refs, 64);
333	BTRFS_SETGET_FUNCS(extent_generation, struct btrfs_extent_item, generation, 64);
334	BTRFS_SETGET_FUNCS(extent_flags, struct btrfs_extent_item, flags, 64);
335
336	BTRFS_SETGET_FUNCS(tree_block_level, struct btrfs_tree_block_info, level, 8);
337
338	static inline void btrfs_tree_block_key(const struct extent_buffer *eb,
339	struct btrfs_tree_block_info *item,
340	struct btrfs_disk_key *key)
341	{
342	read_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
343	}
344
345	static inline void btrfs_set_tree_block_key(const struct extent_buffer *eb,
346	struct btrfs_tree_block_info *item,
347	struct btrfs_disk_key *key)
348	{
349	write_eb_member(eb, item, struct btrfs_tree_block_info, key, key);
350	}
351
352	BTRFS_SETGET_FUNCS(extent_data_ref_root, struct btrfs_extent_data_ref, root, 64);
353	BTRFS_SETGET_FUNCS(extent_data_ref_objectid, struct btrfs_extent_data_ref,
354	objectid, 64);
355	BTRFS_SETGET_FUNCS(extent_data_ref_offset, struct btrfs_extent_data_ref,
356	offset, 64);
357	BTRFS_SETGET_FUNCS(extent_data_ref_count, struct btrfs_extent_data_ref, count, 32);
358
359	BTRFS_SETGET_FUNCS(shared_data_ref_count, struct btrfs_shared_data_ref, count, 32);
360
361	BTRFS_SETGET_FUNCS(extent_owner_ref_root_id, struct btrfs_extent_owner_ref,
362	root_id, 64);
363
364	BTRFS_SETGET_FUNCS(extent_inline_ref_type, struct btrfs_extent_inline_ref,
365	type, 8);
366	BTRFS_SETGET_FUNCS(extent_inline_ref_offset, struct btrfs_extent_inline_ref,
367	offset, 64);
368
369	static inline u32 btrfs_extent_inline_ref_size(int type)
370	{
371	if (type == BTRFS_TREE_BLOCK_REF_KEY ||
372	type == BTRFS_SHARED_BLOCK_REF_KEY)
373	return sizeof(struct btrfs_extent_inline_ref);
374	if (type == BTRFS_SHARED_DATA_REF_KEY)
375	return sizeof(struct btrfs_shared_data_ref) +
376	sizeof(struct btrfs_extent_inline_ref);
377	if (type == BTRFS_EXTENT_DATA_REF_KEY)
378	return sizeof(struct btrfs_extent_data_ref) +
379	offsetof(struct btrfs_extent_inline_ref, offset);
380	if (type == BTRFS_EXTENT_OWNER_REF_KEY)
381	return sizeof(struct btrfs_extent_inline_ref);
382	return 0;
383	}
384
385	/* struct btrfs_node */
386	BTRFS_SETGET_FUNCS(key_blockptr, struct btrfs_key_ptr, blockptr, 64);
387	BTRFS_SETGET_FUNCS(key_generation, struct btrfs_key_ptr, generation, 64);
388	BTRFS_SETGET_STACK_FUNCS(stack_key_blockptr, struct btrfs_key_ptr, blockptr, 64);
389	BTRFS_SETGET_STACK_FUNCS(stack_key_generation, struct btrfs_key_ptr,
390	generation, 64);
391
392	static inline u64 btrfs_node_blockptr(const struct extent_buffer *eb, int nr)
393	{
394	unsigned long ptr;
395
396	ptr = offsetof(struct btrfs_node, ptrs) +
397	sizeof(struct btrfs_key_ptr) * nr;
398	return btrfs_key_blockptr(eb, s: (struct btrfs_key_ptr *)ptr);
399	}
400
401	static inline void btrfs_set_node_blockptr(const struct extent_buffer *eb,
402	int nr, u64 val)
403	{
404	unsigned long ptr;
405
406	ptr = offsetof(struct btrfs_node, ptrs) +
407	sizeof(struct btrfs_key_ptr) * nr;
408	btrfs_set_key_blockptr(eb, s: (struct btrfs_key_ptr *)ptr, val);
409	}
410
411	static inline u64 btrfs_node_ptr_generation(const struct extent_buffer *eb, int nr)
412	{
413	unsigned long ptr;
414
415	ptr = offsetof(struct btrfs_node, ptrs) +
416	sizeof(struct btrfs_key_ptr) * nr;
417	return btrfs_key_generation(eb, s: (struct btrfs_key_ptr *)ptr);
418	}
419
420	static inline void btrfs_set_node_ptr_generation(const struct extent_buffer *eb,
421	int nr, u64 val)
422	{
423	unsigned long ptr;
424
425	ptr = offsetof(struct btrfs_node, ptrs) +
426	sizeof(struct btrfs_key_ptr) * nr;
427	btrfs_set_key_generation(eb, s: (struct btrfs_key_ptr *)ptr, val);
428	}
429
430	static inline unsigned long btrfs_node_key_ptr_offset(const struct extent_buffer *eb, int nr)
431	{
432	return offsetof(struct btrfs_node, ptrs) +
433	sizeof(struct btrfs_key_ptr) * nr;
434	}
435
436	void btrfs_node_key(const struct extent_buffer *eb,
437	struct btrfs_disk_key *disk_key, int nr);
438
439	static inline void btrfs_set_node_key(const struct extent_buffer *eb,
440	struct btrfs_disk_key *disk_key, int nr)
441	{
442	unsigned long ptr;
443
444	ptr = btrfs_node_key_ptr_offset(eb, nr);
445	write_eb_member(eb, (struct btrfs_key_ptr *)ptr,
446	struct btrfs_key_ptr, key, disk_key);
447	}
448
449	/* struct btrfs_item */
450	BTRFS_SETGET_FUNCS(raw_item_offset, struct btrfs_item, offset, 32);
451	BTRFS_SETGET_FUNCS(raw_item_size, struct btrfs_item, size, 32);
452	BTRFS_SETGET_STACK_FUNCS(stack_item_offset, struct btrfs_item, offset, 32);
453	BTRFS_SETGET_STACK_FUNCS(stack_item_size, struct btrfs_item, size, 32);
454
455	static inline unsigned long btrfs_item_nr_offset(const struct extent_buffer *eb, int nr)
456	{
457	return offsetof(struct btrfs_leaf, items) +
458	sizeof(struct btrfs_item) * nr;
459	}
460
461	static inline struct btrfs_item *btrfs_item_nr(const struct extent_buffer *eb, int nr)
462	{
463	return (struct btrfs_item *)btrfs_item_nr_offset(eb, nr);
464	}
465
466	#define BTRFS_ITEM_SETGET_FUNCS(member) \
467	static inline u32 btrfs_item_##member(const struct extent_buffer *eb, int slot) \
468	{ \
469	return btrfs_raw_item_##member(eb, btrfs_item_nr(eb, slot)); \
470	} \
471	static inline void btrfs_set_item_##member(const struct extent_buffer *eb, \
472	int slot, u32 val) \
473	{ \
474	btrfs_set_raw_item_##member(eb, btrfs_item_nr(eb, slot), val); \
475	} \
476	static inline u32 btrfs_token_item_##member(struct btrfs_map_token *token, \
477	int slot) \
478	{ \
479	struct btrfs_item *item = btrfs_item_nr(token->eb, slot); \
480	return btrfs_token_raw_item_##member(token, item); \
481	} \
482	static inline void btrfs_set_token_item_##member(struct btrfs_map_token *token, \
483	int slot, u32 val) \
484	{ \
485	struct btrfs_item *item = btrfs_item_nr(token->eb, slot); \
486	btrfs_set_token_raw_item_##member(token, item, val); \
487	}
488
489	BTRFS_ITEM_SETGET_FUNCS(offset)
490	BTRFS_ITEM_SETGET_FUNCS(size);
491
492	static inline u32 btrfs_item_data_end(const struct extent_buffer *eb, int nr)
493	{
494	return btrfs_item_offset(eb, slot: nr) + btrfs_item_size(eb, slot: nr);
495	}
496
497	static inline void btrfs_item_key(const struct extent_buffer *eb,
498	struct btrfs_disk_key *disk_key, int nr)
499	{
500	struct btrfs_item *item = btrfs_item_nr(eb, nr);
501
502	read_eb_member(eb, item, struct btrfs_item, key, disk_key);
503	}
504
505	static inline void btrfs_set_item_key(struct extent_buffer *eb,
506	struct btrfs_disk_key *disk_key, int nr)
507	{
508	struct btrfs_item *item = btrfs_item_nr(eb, nr);
509
510	write_eb_member(eb, item, struct btrfs_item, key, disk_key);
511	}
512
513	BTRFS_SETGET_FUNCS(dir_log_end, struct btrfs_dir_log_item, end, 64);
514
515	/* struct btrfs_root_ref */
516	BTRFS_SETGET_FUNCS(root_ref_dirid, struct btrfs_root_ref, dirid, 64);
517	BTRFS_SETGET_FUNCS(root_ref_sequence, struct btrfs_root_ref, sequence, 64);
518	BTRFS_SETGET_FUNCS(root_ref_name_len, struct btrfs_root_ref, name_len, 16);
519	BTRFS_SETGET_STACK_FUNCS(stack_root_ref_dirid, struct btrfs_root_ref, dirid, 64);
520	BTRFS_SETGET_STACK_FUNCS(stack_root_ref_sequence, struct btrfs_root_ref, sequence, 64);
521	BTRFS_SETGET_STACK_FUNCS(stack_root_ref_name_len, struct btrfs_root_ref, name_len, 16);
522
523	/* struct btrfs_dir_item */
524	BTRFS_SETGET_FUNCS(dir_data_len, struct btrfs_dir_item, data_len, 16);
525	BTRFS_SETGET_FUNCS(dir_flags, struct btrfs_dir_item, type, 8);
526	BTRFS_SETGET_FUNCS(dir_name_len, struct btrfs_dir_item, name_len, 16);
527	BTRFS_SETGET_FUNCS(dir_transid, struct btrfs_dir_item, transid, 64);
528	BTRFS_SETGET_STACK_FUNCS(stack_dir_flags, struct btrfs_dir_item, type, 8);
529	BTRFS_SETGET_STACK_FUNCS(stack_dir_data_len, struct btrfs_dir_item, data_len, 16);
530	BTRFS_SETGET_STACK_FUNCS(stack_dir_name_len, struct btrfs_dir_item, name_len, 16);
531	BTRFS_SETGET_STACK_FUNCS(stack_dir_transid, struct btrfs_dir_item, transid, 64);
532
533	static inline u8 btrfs_dir_ftype(const struct extent_buffer *eb,
534	const struct btrfs_dir_item *item)
535	{
536	return btrfs_dir_flags_to_ftype(flags: btrfs_dir_flags(eb, s: item));
537	}
538
539	static inline u8 btrfs_stack_dir_ftype(const struct btrfs_dir_item *item)
540	{
541	return btrfs_dir_flags_to_ftype(flags: btrfs_stack_dir_flags(s: item));
542	}
543
544	static inline void btrfs_dir_item_key(const struct extent_buffer *eb,
545	const struct btrfs_dir_item *item,
546	struct btrfs_disk_key *key)
547	{
548	read_eb_member(eb, item, struct btrfs_dir_item, location, key);
549	}
550
551	static inline void btrfs_set_dir_item_key(struct extent_buffer *eb,
552	struct btrfs_dir_item *item,
553	const struct btrfs_disk_key *key)
554	{
555	write_eb_member(eb, item, struct btrfs_dir_item, location, key);
556	}
557
558	BTRFS_SETGET_FUNCS(free_space_entries, struct btrfs_free_space_header,
559	num_entries, 64);
560	BTRFS_SETGET_FUNCS(free_space_bitmaps, struct btrfs_free_space_header,
561	num_bitmaps, 64);
562	BTRFS_SETGET_FUNCS(free_space_generation, struct btrfs_free_space_header,
563	generation, 64);
564
565	static inline void btrfs_free_space_key(const struct extent_buffer *eb,
566	const struct btrfs_free_space_header *h,
567	struct btrfs_disk_key *key)
568	{
569	read_eb_member(eb, h, struct btrfs_free_space_header, location, key);
570	}
571
572	static inline void btrfs_set_free_space_key(struct extent_buffer *eb,
573	struct btrfs_free_space_header *h,
574	const struct btrfs_disk_key *key)
575	{
576	write_eb_member(eb, h, struct btrfs_free_space_header, location, key);
577	}
578
579	/* struct btrfs_disk_key */
580	BTRFS_SETGET_STACK_FUNCS(disk_key_objectid, struct btrfs_disk_key, objectid, 64);
581	BTRFS_SETGET_STACK_FUNCS(disk_key_offset, struct btrfs_disk_key, offset, 64);
582	BTRFS_SETGET_STACK_FUNCS(disk_key_type, struct btrfs_disk_key, type, 8);
583
584	#ifdef __LITTLE_ENDIAN
585
586	/*
587	* Optimized helpers for little-endian architectures where CPU and on-disk
588	* structures have the same endianness and we can skip conversions.
589	*/
590
591	static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu_key,
592	const struct btrfs_disk_key *disk_key)
593	{
594	memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
595	}
596
597	static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk_key,
598	const struct btrfs_key *cpu_key)
599	{
600	memcpy(disk_key, cpu_key, sizeof(struct btrfs_key));
601	}
602
603	static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
604	struct btrfs_key *cpu_key, int nr)
605	{
606	struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
607
608	btrfs_node_key(eb, disk_key, nr);
609	}
610
611	static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
612	struct btrfs_key *cpu_key, int nr)
613	{
614	struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
615
616	btrfs_item_key(eb, disk_key, nr);
617	}
618
619	static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
620	const struct btrfs_dir_item *item,
621	struct btrfs_key *cpu_key)
622	{
623	struct btrfs_disk_key *disk_key = (struct btrfs_disk_key *)cpu_key;
624
625	btrfs_dir_item_key(eb, item, key: disk_key);
626	}
627
628	#else
629
630	static inline void btrfs_disk_key_to_cpu(struct btrfs_key *cpu,
631	const struct btrfs_disk_key *disk)
632	{
633	cpu->offset = le64_to_cpu(disk->offset);
634	cpu->type = disk->type;
635	cpu->objectid = le64_to_cpu(disk->objectid);
636	}
637
638	static inline void btrfs_cpu_key_to_disk(struct btrfs_disk_key *disk,
639	const struct btrfs_key *cpu)
640	{
641	disk->offset = cpu_to_le64(cpu->offset);
642	disk->type = cpu->type;
643	disk->objectid = cpu_to_le64(cpu->objectid);
644	}
645
646	static inline void btrfs_node_key_to_cpu(const struct extent_buffer *eb,
647	struct btrfs_key *key, int nr)
648	{
649	struct btrfs_disk_key disk_key;
650
651	btrfs_node_key(eb, &disk_key, nr);
652	btrfs_disk_key_to_cpu(key, &disk_key);
653	}
654
655	static inline void btrfs_item_key_to_cpu(const struct extent_buffer *eb,
656	struct btrfs_key *key, int nr)
657	{
658	struct btrfs_disk_key disk_key;
659
660	btrfs_item_key(eb, &disk_key, nr);
661	btrfs_disk_key_to_cpu(key, &disk_key);
662	}
663
664	static inline void btrfs_dir_item_key_to_cpu(const struct extent_buffer *eb,
665	const struct btrfs_dir_item *item,
666	struct btrfs_key *key)
667	{
668	struct btrfs_disk_key disk_key;
669
670	btrfs_dir_item_key(eb, item, &disk_key);
671	btrfs_disk_key_to_cpu(key, &disk_key);
672	}
673
674	#endif
675
676	/* struct btrfs_header */
677	BTRFS_SETGET_HEADER_FUNCS(header_bytenr, struct btrfs_header, bytenr, 64);
678	BTRFS_SETGET_HEADER_FUNCS(header_generation, struct btrfs_header, generation, 64);
679	BTRFS_SETGET_HEADER_FUNCS(header_owner, struct btrfs_header, owner, 64);
680	BTRFS_SETGET_HEADER_FUNCS(header_nritems, struct btrfs_header, nritems, 32);
681	BTRFS_SETGET_HEADER_FUNCS(header_flags, struct btrfs_header, flags, 64);
682	BTRFS_SETGET_HEADER_FUNCS(header_level, struct btrfs_header, level, 8);
683	BTRFS_SETGET_STACK_FUNCS(stack_header_generation, struct btrfs_header,
684	generation, 64);
685	BTRFS_SETGET_STACK_FUNCS(stack_header_owner, struct btrfs_header, owner, 64);
686	BTRFS_SETGET_STACK_FUNCS(stack_header_nritems, struct btrfs_header, nritems, 32);
687	BTRFS_SETGET_STACK_FUNCS(stack_header_bytenr, struct btrfs_header, bytenr, 64);
688
689	static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
690	{
691	return (btrfs_header_flags(eb) & flag) == flag;
692	}
693
694	static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
695	{
696	u64 flags = btrfs_header_flags(eb);
697
698	btrfs_set_header_flags(eb, val: flags | flag);
699	}
700
701	static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
702	{
703	u64 flags = btrfs_header_flags(eb);
704
705	btrfs_set_header_flags(eb, val: flags & ~flag);
706	}
707
708	static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
709	{
710	u64 flags = btrfs_header_flags(eb);
711
712	return flags >> BTRFS_BACKREF_REV_SHIFT;
713	}
714
715	static inline void btrfs_set_header_backref_rev(struct extent_buffer *eb, int rev)
716	{
717	u64 flags = btrfs_header_flags(eb);
718
719	flags &= ~BTRFS_BACKREF_REV_MASK;
720	flags |= (u64)rev << BTRFS_BACKREF_REV_SHIFT;
721	btrfs_set_header_flags(eb, val: flags);
722	}
723
724	static inline int btrfs_is_leaf(const struct extent_buffer *eb)
725	{
726	return btrfs_header_level(eb) == 0;
727	}
728
729	/* struct btrfs_root_item */
730	BTRFS_SETGET_FUNCS(disk_root_generation, struct btrfs_root_item, generation, 64);
731	BTRFS_SETGET_FUNCS(disk_root_refs, struct btrfs_root_item, refs, 32);
732	BTRFS_SETGET_FUNCS(disk_root_bytenr, struct btrfs_root_item, bytenr, 64);
733	BTRFS_SETGET_FUNCS(disk_root_level, struct btrfs_root_item, level, 8);
734
735	BTRFS_SETGET_STACK_FUNCS(root_generation, struct btrfs_root_item, generation, 64);
736	BTRFS_SETGET_STACK_FUNCS(root_bytenr, struct btrfs_root_item, bytenr, 64);
737	BTRFS_SETGET_STACK_FUNCS(root_drop_level, struct btrfs_root_item, drop_level, 8);
738	BTRFS_SETGET_STACK_FUNCS(root_level, struct btrfs_root_item, level, 8);
739	BTRFS_SETGET_STACK_FUNCS(root_dirid, struct btrfs_root_item, root_dirid, 64);
740	BTRFS_SETGET_STACK_FUNCS(root_refs, struct btrfs_root_item, refs, 32);
741	BTRFS_SETGET_STACK_FUNCS(root_flags, struct btrfs_root_item, flags, 64);
742	BTRFS_SETGET_STACK_FUNCS(root_used, struct btrfs_root_item, bytes_used, 64);
743	BTRFS_SETGET_STACK_FUNCS(root_limit, struct btrfs_root_item, byte_limit, 64);
744	BTRFS_SETGET_STACK_FUNCS(root_last_snapshot, struct btrfs_root_item,
745	last_snapshot, 64);
746	BTRFS_SETGET_STACK_FUNCS(root_generation_v2, struct btrfs_root_item,
747	generation_v2, 64);
748	BTRFS_SETGET_STACK_FUNCS(root_ctransid, struct btrfs_root_item, ctransid, 64);
749	BTRFS_SETGET_STACK_FUNCS(root_otransid, struct btrfs_root_item, otransid, 64);
750	BTRFS_SETGET_STACK_FUNCS(root_stransid, struct btrfs_root_item, stransid, 64);
751	BTRFS_SETGET_STACK_FUNCS(root_rtransid, struct btrfs_root_item, rtransid, 64);
752
753	/* struct btrfs_root_backup */
754	BTRFS_SETGET_STACK_FUNCS(backup_tree_root, struct btrfs_root_backup,
755	tree_root, 64);
756	BTRFS_SETGET_STACK_FUNCS(backup_tree_root_gen, struct btrfs_root_backup,
757	tree_root_gen, 64);
758	BTRFS_SETGET_STACK_FUNCS(backup_tree_root_level, struct btrfs_root_backup,
759	tree_root_level, 8);
760
761	BTRFS_SETGET_STACK_FUNCS(backup_chunk_root, struct btrfs_root_backup,
762	chunk_root, 64);
763	BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_gen, struct btrfs_root_backup,
764	chunk_root_gen, 64);
765	BTRFS_SETGET_STACK_FUNCS(backup_chunk_root_level, struct btrfs_root_backup,
766	chunk_root_level, 8);
767
768	BTRFS_SETGET_STACK_FUNCS(backup_extent_root, struct btrfs_root_backup,
769	extent_root, 64);
770	BTRFS_SETGET_STACK_FUNCS(backup_extent_root_gen, struct btrfs_root_backup,
771	extent_root_gen, 64);
772	BTRFS_SETGET_STACK_FUNCS(backup_extent_root_level, struct btrfs_root_backup,
773	extent_root_level, 8);
774
775	BTRFS_SETGET_STACK_FUNCS(backup_fs_root, struct btrfs_root_backup,
776	fs_root, 64);
777	BTRFS_SETGET_STACK_FUNCS(backup_fs_root_gen, struct btrfs_root_backup,
778	fs_root_gen, 64);
779	BTRFS_SETGET_STACK_FUNCS(backup_fs_root_level, struct btrfs_root_backup,
780	fs_root_level, 8);
781
782	BTRFS_SETGET_STACK_FUNCS(backup_dev_root, struct btrfs_root_backup,
783	dev_root, 64);
784	BTRFS_SETGET_STACK_FUNCS(backup_dev_root_gen, struct btrfs_root_backup,
785	dev_root_gen, 64);
786	BTRFS_SETGET_STACK_FUNCS(backup_dev_root_level, struct btrfs_root_backup,
787	dev_root_level, 8);
788
789	BTRFS_SETGET_STACK_FUNCS(backup_csum_root, struct btrfs_root_backup,
790	csum_root, 64);
791	BTRFS_SETGET_STACK_FUNCS(backup_csum_root_gen, struct btrfs_root_backup,
792	csum_root_gen, 64);
793	BTRFS_SETGET_STACK_FUNCS(backup_csum_root_level, struct btrfs_root_backup,
794	csum_root_level, 8);
795	BTRFS_SETGET_STACK_FUNCS(backup_total_bytes, struct btrfs_root_backup,
796	total_bytes, 64);
797	BTRFS_SETGET_STACK_FUNCS(backup_bytes_used, struct btrfs_root_backup,
798	bytes_used, 64);
799	BTRFS_SETGET_STACK_FUNCS(backup_num_devices, struct btrfs_root_backup,
800	num_devices, 64);
801
802	/* struct btrfs_balance_item */
803	BTRFS_SETGET_FUNCS(balance_flags, struct btrfs_balance_item, flags, 64);
804
805	static inline void btrfs_balance_data(const struct extent_buffer *eb,
806	const struct btrfs_balance_item *bi,
807	struct btrfs_disk_balance_args *ba)
808	{
809	read_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
810	}
811
812	static inline void btrfs_set_balance_data(struct extent_buffer *eb,
813	struct btrfs_balance_item *bi,
814	const struct btrfs_disk_balance_args *ba)
815	{
816	write_eb_member(eb, bi, struct btrfs_balance_item, data, ba);
817	}
818
819	static inline void btrfs_balance_meta(const struct extent_buffer *eb,
820	const struct btrfs_balance_item *bi,
821	struct btrfs_disk_balance_args *ba)
822	{
823	read_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
824	}
825
826	static inline void btrfs_set_balance_meta(struct extent_buffer *eb,
827	struct btrfs_balance_item *bi,
828	const struct btrfs_disk_balance_args *ba)
829	{
830	write_eb_member(eb, bi, struct btrfs_balance_item, meta, ba);
831	}
832
833	static inline void btrfs_balance_sys(const struct extent_buffer *eb,
834	const struct btrfs_balance_item *bi,
835	struct btrfs_disk_balance_args *ba)
836	{
837	read_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
838	}
839
840	static inline void btrfs_set_balance_sys(struct extent_buffer *eb,
841	struct btrfs_balance_item *bi,
842	const struct btrfs_disk_balance_args *ba)
843	{
844	write_eb_member(eb, bi, struct btrfs_balance_item, sys, ba);
845	}
846
847	static inline void btrfs_disk_balance_args_to_cpu(struct btrfs_balance_args *cpu,
848	const struct btrfs_disk_balance_args *disk)
849	{
850	memset(cpu, 0, sizeof(*cpu));
851
852	cpu->profiles = le64_to_cpu(disk->profiles);
853	cpu->usage = le64_to_cpu(disk->usage);
854	cpu->devid = le64_to_cpu(disk->devid);
855	cpu->pstart = le64_to_cpu(disk->pstart);
856	cpu->pend = le64_to_cpu(disk->pend);
857	cpu->vstart = le64_to_cpu(disk->vstart);
858	cpu->vend = le64_to_cpu(disk->vend);
859	cpu->target = le64_to_cpu(disk->target);
860	cpu->flags = le64_to_cpu(disk->flags);
861	cpu->limit = le64_to_cpu(disk->limit);
862	cpu->stripes_min = le32_to_cpu(disk->stripes_min);
863	cpu->stripes_max = le32_to_cpu(disk->stripes_max);
864	}
865
866	static inline void btrfs_cpu_balance_args_to_disk(
867	struct btrfs_disk_balance_args *disk,
868	const struct btrfs_balance_args *cpu)
869	{
870	memset(disk, 0, sizeof(*disk));
871
872	disk->profiles = cpu_to_le64(cpu->profiles);
873	disk->usage = cpu_to_le64(cpu->usage);
874	disk->devid = cpu_to_le64(cpu->devid);
875	disk->pstart = cpu_to_le64(cpu->pstart);
876	disk->pend = cpu_to_le64(cpu->pend);
877	disk->vstart = cpu_to_le64(cpu->vstart);
878	disk->vend = cpu_to_le64(cpu->vend);
879	disk->target = cpu_to_le64(cpu->target);
880	disk->flags = cpu_to_le64(cpu->flags);
881	disk->limit = cpu_to_le64(cpu->limit);
882	disk->stripes_min = cpu_to_le32(cpu->stripes_min);
883	disk->stripes_max = cpu_to_le32(cpu->stripes_max);
884	}
885
886	/* struct btrfs_super_block */
887	BTRFS_SETGET_STACK_FUNCS(super_bytenr, struct btrfs_super_block, bytenr, 64);
888	BTRFS_SETGET_STACK_FUNCS(super_flags, struct btrfs_super_block, flags, 64);
889	BTRFS_SETGET_STACK_FUNCS(super_generation, struct btrfs_super_block,
890	generation, 64);
891	BTRFS_SETGET_STACK_FUNCS(super_root, struct btrfs_super_block, root, 64);
892	BTRFS_SETGET_STACK_FUNCS(super_sys_array_size,
893	struct btrfs_super_block, sys_chunk_array_size, 32);
894	BTRFS_SETGET_STACK_FUNCS(super_chunk_root_generation,
895	struct btrfs_super_block, chunk_root_generation, 64);
896	BTRFS_SETGET_STACK_FUNCS(super_root_level, struct btrfs_super_block,
897	root_level, 8);
898	BTRFS_SETGET_STACK_FUNCS(super_chunk_root, struct btrfs_super_block,
899	chunk_root, 64);
900	BTRFS_SETGET_STACK_FUNCS(super_chunk_root_level, struct btrfs_super_block,
901	chunk_root_level, 8);
902	BTRFS_SETGET_STACK_FUNCS(super_log_root, struct btrfs_super_block, log_root, 64);
903	BTRFS_SETGET_STACK_FUNCS(super_log_root_level, struct btrfs_super_block,
904	log_root_level, 8);
905	BTRFS_SETGET_STACK_FUNCS(super_total_bytes, struct btrfs_super_block,
906	total_bytes, 64);
907	BTRFS_SETGET_STACK_FUNCS(super_bytes_used, struct btrfs_super_block,
908	bytes_used, 64);
909	BTRFS_SETGET_STACK_FUNCS(super_sectorsize, struct btrfs_super_block,
910	sectorsize, 32);
911	BTRFS_SETGET_STACK_FUNCS(super_nodesize, struct btrfs_super_block,
912	nodesize, 32);
913	BTRFS_SETGET_STACK_FUNCS(super_stripesize, struct btrfs_super_block,
914	stripesize, 32);
915	BTRFS_SETGET_STACK_FUNCS(super_root_dir, struct btrfs_super_block,
916	root_dir_objectid, 64);
917	BTRFS_SETGET_STACK_FUNCS(super_num_devices, struct btrfs_super_block,
918	num_devices, 64);
919	BTRFS_SETGET_STACK_FUNCS(super_compat_flags, struct btrfs_super_block,
920	compat_flags, 64);
921	BTRFS_SETGET_STACK_FUNCS(super_compat_ro_flags, struct btrfs_super_block,
922	compat_ro_flags, 64);
923	BTRFS_SETGET_STACK_FUNCS(super_incompat_flags, struct btrfs_super_block,
924	incompat_flags, 64);
925	BTRFS_SETGET_STACK_FUNCS(super_csum_type, struct btrfs_super_block,
926	csum_type, 16);
927	BTRFS_SETGET_STACK_FUNCS(super_cache_generation, struct btrfs_super_block,
928	cache_generation, 64);
929	BTRFS_SETGET_STACK_FUNCS(super_magic, struct btrfs_super_block, magic, 64);
930	BTRFS_SETGET_STACK_FUNCS(super_uuid_tree_generation, struct btrfs_super_block,
931	uuid_tree_generation, 64);
932	BTRFS_SETGET_STACK_FUNCS(super_nr_global_roots, struct btrfs_super_block,
933	nr_global_roots, 64);
934
935	/* struct btrfs_file_extent_item */
936	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_type, struct btrfs_file_extent_item,
937	type, 8);
938	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_bytenr,
939	struct btrfs_file_extent_item, disk_bytenr, 64);
940	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_offset,
941	struct btrfs_file_extent_item, offset, 64);
942	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_generation,
943	struct btrfs_file_extent_item, generation, 64);
944	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_num_bytes,
945	struct btrfs_file_extent_item, num_bytes, 64);
946	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_ram_bytes,
947	struct btrfs_file_extent_item, ram_bytes, 64);
948	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_disk_num_bytes,
949	struct btrfs_file_extent_item, disk_num_bytes, 64);
950	BTRFS_SETGET_STACK_FUNCS(stack_file_extent_compression,
951	struct btrfs_file_extent_item, compression, 8);
952
953
954	BTRFS_SETGET_FUNCS(file_extent_type, struct btrfs_file_extent_item, type, 8);
955	BTRFS_SETGET_FUNCS(file_extent_disk_bytenr, struct btrfs_file_extent_item,
956	disk_bytenr, 64);
957	BTRFS_SETGET_FUNCS(file_extent_generation, struct btrfs_file_extent_item,
958	generation, 64);
959	BTRFS_SETGET_FUNCS(file_extent_disk_num_bytes, struct btrfs_file_extent_item,
960	disk_num_bytes, 64);
961	BTRFS_SETGET_FUNCS(file_extent_offset, struct btrfs_file_extent_item,
962	offset, 64);
963	BTRFS_SETGET_FUNCS(file_extent_num_bytes, struct btrfs_file_extent_item,
964	num_bytes, 64);
965	BTRFS_SETGET_FUNCS(file_extent_ram_bytes, struct btrfs_file_extent_item,
966	ram_bytes, 64);
967	BTRFS_SETGET_FUNCS(file_extent_compression, struct btrfs_file_extent_item,
968	compression, 8);
969	BTRFS_SETGET_FUNCS(file_extent_encryption, struct btrfs_file_extent_item,
970	encryption, 8);
971	BTRFS_SETGET_FUNCS(file_extent_other_encoding, struct btrfs_file_extent_item,
972	other_encoding, 16);
973
974	/* btrfs_qgroup_status_item */
975	BTRFS_SETGET_FUNCS(qgroup_status_generation, struct btrfs_qgroup_status_item,
976	generation, 64);
977	BTRFS_SETGET_FUNCS(qgroup_status_version, struct btrfs_qgroup_status_item,
978	version, 64);
979	BTRFS_SETGET_FUNCS(qgroup_status_flags, struct btrfs_qgroup_status_item,
980	flags, 64);
981	BTRFS_SETGET_FUNCS(qgroup_status_rescan, struct btrfs_qgroup_status_item,
982	rescan, 64);
983	BTRFS_SETGET_FUNCS(qgroup_status_enable_gen, struct btrfs_qgroup_status_item,
984	enable_gen, 64);
985
986	/* btrfs_qgroup_info_item */
987	BTRFS_SETGET_FUNCS(qgroup_info_generation, struct btrfs_qgroup_info_item,
988	generation, 64);
989	BTRFS_SETGET_FUNCS(qgroup_info_rfer, struct btrfs_qgroup_info_item, rfer, 64);
990	BTRFS_SETGET_FUNCS(qgroup_info_rfer_cmpr, struct btrfs_qgroup_info_item,
991	rfer_cmpr, 64);
992	BTRFS_SETGET_FUNCS(qgroup_info_excl, struct btrfs_qgroup_info_item, excl, 64);
993	BTRFS_SETGET_FUNCS(qgroup_info_excl_cmpr, struct btrfs_qgroup_info_item,
994	excl_cmpr, 64);
995
996	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_generation,
997	struct btrfs_qgroup_info_item, generation, 64);
998	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer, struct btrfs_qgroup_info_item,
999	rfer, 64);
1000	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_rfer_cmpr,
1001	struct btrfs_qgroup_info_item, rfer_cmpr, 64);
1002	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl, struct btrfs_qgroup_info_item,
1003	excl, 64);
1004	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_info_excl_cmpr,
1005	struct btrfs_qgroup_info_item, excl_cmpr, 64);
1006
1007	/* btrfs_qgroup_limit_item */
1008	BTRFS_SETGET_FUNCS(qgroup_limit_flags, struct btrfs_qgroup_limit_item, flags, 64);
1009	BTRFS_SETGET_FUNCS(qgroup_limit_max_rfer, struct btrfs_qgroup_limit_item,
1010	max_rfer, 64);
1011	BTRFS_SETGET_FUNCS(qgroup_limit_max_excl, struct btrfs_qgroup_limit_item,
1012	max_excl, 64);
1013	BTRFS_SETGET_FUNCS(qgroup_limit_rsv_rfer, struct btrfs_qgroup_limit_item,
1014	rsv_rfer, 64);
1015	BTRFS_SETGET_FUNCS(qgroup_limit_rsv_excl, struct btrfs_qgroup_limit_item,
1016	rsv_excl, 64);
1017	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_flags,
1018	struct btrfs_qgroup_limit_item, flags, 64);
1019	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_rfer,
1020	struct btrfs_qgroup_limit_item, max_rfer, 64);
1021	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_max_excl,
1022	struct btrfs_qgroup_limit_item, max_excl, 64);
1023	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_rfer,
1024	struct btrfs_qgroup_limit_item, rsv_rfer, 64);
1025	BTRFS_SETGET_STACK_FUNCS(stack_qgroup_limit_rsv_excl,
1026	struct btrfs_qgroup_limit_item, rsv_excl, 64);
1027
1028	/* btrfs_dev_replace_item */
1029	BTRFS_SETGET_FUNCS(dev_replace_src_devid,
1030	struct btrfs_dev_replace_item, src_devid, 64);
1031	BTRFS_SETGET_FUNCS(dev_replace_cont_reading_from_srcdev_mode,
1032	struct btrfs_dev_replace_item, cont_reading_from_srcdev_mode,
1033	64);
1034	BTRFS_SETGET_FUNCS(dev_replace_replace_state, struct btrfs_dev_replace_item,
1035	replace_state, 64);
1036	BTRFS_SETGET_FUNCS(dev_replace_time_started, struct btrfs_dev_replace_item,
1037	time_started, 64);
1038	BTRFS_SETGET_FUNCS(dev_replace_time_stopped, struct btrfs_dev_replace_item,
1039	time_stopped, 64);
1040	BTRFS_SETGET_FUNCS(dev_replace_num_write_errors, struct btrfs_dev_replace_item,
1041	num_write_errors, 64);
1042	BTRFS_SETGET_FUNCS(dev_replace_num_uncorrectable_read_errors,
1043	struct btrfs_dev_replace_item, num_uncorrectable_read_errors,
1044	64);
1045	BTRFS_SETGET_FUNCS(dev_replace_cursor_left, struct btrfs_dev_replace_item,
1046	cursor_left, 64);
1047	BTRFS_SETGET_FUNCS(dev_replace_cursor_right, struct btrfs_dev_replace_item,
1048	cursor_right, 64);
1049
1050	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_src_devid,
1051	struct btrfs_dev_replace_item, src_devid, 64);
1052	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cont_reading_from_srcdev_mode,
1053	struct btrfs_dev_replace_item,
1054	cont_reading_from_srcdev_mode, 64);
1055	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_replace_state,
1056	struct btrfs_dev_replace_item, replace_state, 64);
1057	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_started,
1058	struct btrfs_dev_replace_item, time_started, 64);
1059	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_time_stopped,
1060	struct btrfs_dev_replace_item, time_stopped, 64);
1061	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_write_errors,
1062	struct btrfs_dev_replace_item, num_write_errors, 64);
1063	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_num_uncorrectable_read_errors,
1064	struct btrfs_dev_replace_item,
1065	num_uncorrectable_read_errors, 64);
1066	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_left,
1067	struct btrfs_dev_replace_item, cursor_left, 64);
1068	BTRFS_SETGET_STACK_FUNCS(stack_dev_replace_cursor_right,
1069	struct btrfs_dev_replace_item, cursor_right, 64);
1070
1071	/* btrfs_verity_descriptor_item */
1072	BTRFS_SETGET_FUNCS(verity_descriptor_encryption, struct btrfs_verity_descriptor_item,
1073	encryption, 8);
1074	BTRFS_SETGET_FUNCS(verity_descriptor_size, struct btrfs_verity_descriptor_item,
1075	size, 64);
1076	BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_encryption,
1077	struct btrfs_verity_descriptor_item, encryption, 8);
1078	BTRFS_SETGET_STACK_FUNCS(stack_verity_descriptor_size,
1079	struct btrfs_verity_descriptor_item, size, 64);
1080
1081	/* Cast into the data area of the leaf. */
1082	#define btrfs_item_ptr(leaf, slot, type) \
1083	((type *)(btrfs_item_nr_offset(leaf, 0) + btrfs_item_offset(leaf, slot)))
1084
1085	#define btrfs_item_ptr_offset(leaf, slot) \
1086	((unsigned long)(btrfs_item_nr_offset(leaf, 0) + btrfs_item_offset(leaf, slot)))
1087
1088	#endif
1089