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1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef BTRFS_BLOCK_GROUP_H
4#define BTRFS_BLOCK_GROUP_H
5
6#include <linux/atomic.h>
7#include <linux/mutex.h>
8#include <linux/list.h>
9#include <linux/spinlock.h>
10#include <linux/refcount.h>
11#include <linux/wait.h>
12#include <linux/sizes.h>
13#include <linux/rwsem.h>
14#include <linux/rbtree.h>
15#include <uapi/linux/btrfs_tree.h>
16#include "free-space-cache.h"
17
18struct btrfs_chunk_map;
19struct btrfs_fs_info;
20struct btrfs_inode;
21struct btrfs_trans_handle;
22
23enum btrfs_disk_cache_state {
24 BTRFS_DC_WRITTEN,
25 BTRFS_DC_ERROR,
26 BTRFS_DC_CLEAR,
27 BTRFS_DC_SETUP,
28};
29
30enum btrfs_block_group_size_class {
31 /* Unset */
32 BTRFS_BG_SZ_NONE,
33 /* 0 < size <= 128K */
34 BTRFS_BG_SZ_SMALL,
35 /* 128K < size <= 8M */
36 BTRFS_BG_SZ_MEDIUM,
37 /* 8M < size < BG_LENGTH */
38 BTRFS_BG_SZ_LARGE,
39};
40
41/*
42 * This describes the state of the block_group for async discard. This is due
43 * to the two pass nature of it where extent discarding is prioritized over
44 * bitmap discarding. BTRFS_DISCARD_RESET_CURSOR is set when we are resetting
45 * between lists to prevent contention for discard state variables
46 * (eg. discard_cursor).
47 */
48enum btrfs_discard_state {
49 BTRFS_DISCARD_EXTENTS,
50 BTRFS_DISCARD_BITMAPS,
51 BTRFS_DISCARD_RESET_CURSOR,
52};
53
54/*
55 * Control flags for do_chunk_alloc's force field CHUNK_ALLOC_NO_FORCE means to
56 * only allocate a chunk if we really need one.
57 *
58 * CHUNK_ALLOC_LIMITED means to only try and allocate one if we have very few
59 * chunks already allocated. This is used as part of the clustering code to
60 * help make sure we have a good pool of storage to cluster in, without filling
61 * the FS with empty chunks
62 *
63 * CHUNK_ALLOC_FORCE means it must try to allocate one
64 *
65 * CHUNK_ALLOC_FORCE_FOR_EXTENT like CHUNK_ALLOC_FORCE but called from
66 * find_free_extent() that also activaes the zone
67 */
68enum btrfs_chunk_alloc_enum {
69 CHUNK_ALLOC_NO_FORCE,
70 CHUNK_ALLOC_LIMITED,
71 CHUNK_ALLOC_FORCE,
72 CHUNK_ALLOC_FORCE_FOR_EXTENT,
73};
74
75/* Block group flags set at runtime */
76enum btrfs_block_group_flags {
77 BLOCK_GROUP_FLAG_IREF,
78 BLOCK_GROUP_FLAG_REMOVED,
79 BLOCK_GROUP_FLAG_TO_COPY,
80 BLOCK_GROUP_FLAG_RELOCATING_REPAIR,
81 BLOCK_GROUP_FLAG_CHUNK_ITEM_INSERTED,
82 BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
83 BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
84 /* Does the block group need to be added to the free space tree? */
85 BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE,
86 /* Indicate that the block group is placed on a sequential zone */
87 BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE,
88 /*
89 * Indicate that block group is in the list of new block groups of a
90 * transaction.
91 */
92 BLOCK_GROUP_FLAG_NEW,
93};
94
95enum btrfs_caching_type {
96 BTRFS_CACHE_NO,
97 BTRFS_CACHE_STARTED,
98 BTRFS_CACHE_FINISHED,
99 BTRFS_CACHE_ERROR,
100};
101
102struct btrfs_caching_control {
103 struct list_head list;
104 struct mutex mutex;
105 wait_queue_head_t wait;
106 struct btrfs_work work;
107 struct btrfs_block_group *block_group;
108 /* Track progress of caching during allocation. */
109 atomic_t progress;
110 refcount_t count;
111};
112
113/* Once caching_thread() finds this much free space, it will wake up waiters. */
114#define CACHING_CTL_WAKE_UP SZ_2M
115
116struct btrfs_block_group {
117 struct btrfs_fs_info *fs_info;
118 struct btrfs_inode *inode;
119 spinlock_t lock;
120 u64 start;
121 u64 length;
122 u64 pinned;
123 u64 reserved;
124 u64 used;
125 u64 delalloc_bytes;
126 u64 bytes_super;
127 u64 flags;
128 u64 cache_generation;
129 u64 global_root_id;
130
131 /*
132 * The last committed used bytes of this block group, if the above @used
133 * is still the same as @commit_used, we don't need to update block
134 * group item of this block group.
135 */
136 u64 commit_used;
137 /*
138 * If the free space extent count exceeds this number, convert the block
139 * group to bitmaps.
140 */
141 u32 bitmap_high_thresh;
142
143 /*
144 * If the free space extent count drops below this number, convert the
145 * block group back to extents.
146 */
147 u32 bitmap_low_thresh;
148
149 /*
150 * It is just used for the delayed data space allocation because
151 * only the data space allocation and the relative metadata update
152 * can be done cross the transaction.
153 */
154 struct rw_semaphore data_rwsem;
155
156 /* For raid56, this is a full stripe, without parity */
157 unsigned long full_stripe_len;
158 unsigned long runtime_flags;
159
160 unsigned int ro;
161
162 int disk_cache_state;
163
164 /* Cache tracking stuff */
165 int cached;
166 struct btrfs_caching_control *caching_ctl;
167
168 struct btrfs_space_info *space_info;
169
170 /* Free space cache stuff */
171 struct btrfs_free_space_ctl *free_space_ctl;
172
173 /* Block group cache stuff */
174 struct rb_node cache_node;
175
176 /* For block groups in the same raid type */
177 struct list_head list;
178
179 refcount_t refs;
180
181 /*
182 * List of struct btrfs_free_clusters for this block group.
183 * Today it will only have one thing on it, but that may change
184 */
185 struct list_head cluster_list;
186
187 /*
188 * Used for several lists:
189 *
190 * 1) struct btrfs_fs_info::unused_bgs
191 * 2) struct btrfs_fs_info::reclaim_bgs
192 * 3) struct btrfs_transaction::deleted_bgs
193 * 4) struct btrfs_trans_handle::new_bgs
194 */
195 struct list_head bg_list;
196
197 /* For read-only block groups */
198 struct list_head ro_list;
199
200 /*
201 * When non-zero it means the block group's logical address and its
202 * device extents can not be reused for future block group allocations
203 * until the counter goes down to 0. This is to prevent them from being
204 * reused while some task is still using the block group after it was
205 * deleted - we want to make sure they can only be reused for new block
206 * groups after that task is done with the deleted block group.
207 */
208 atomic_t frozen;
209
210 /* For discard operations */
211 struct list_head discard_list;
212 int discard_index;
213 u64 discard_eligible_time;
214 u64 discard_cursor;
215 enum btrfs_discard_state discard_state;
216
217 /* For dirty block groups */
218 struct list_head dirty_list;
219 struct list_head io_list;
220
221 struct btrfs_io_ctl io_ctl;
222
223 /*
224 * Incremented when doing extent allocations and holding a read lock
225 * on the space_info's groups_sem semaphore.
226 * Decremented when an ordered extent that represents an IO against this
227 * block group's range is created (after it's added to its inode's
228 * root's list of ordered extents) or immediately after the allocation
229 * if it's a metadata extent or fallocate extent (for these cases we
230 * don't create ordered extents).
231 */
232 atomic_t reservations;
233
234 /*
235 * Incremented while holding the spinlock *lock* by a task checking if
236 * it can perform a nocow write (incremented if the value for the *ro*
237 * field is 0). Decremented by such tasks once they create an ordered
238 * extent or before that if some error happens before reaching that step.
239 * This is to prevent races between block group relocation and nocow
240 * writes through direct IO.
241 */
242 atomic_t nocow_writers;
243
244 /* Lock for free space tree operations. */
245 struct mutex free_space_lock;
246
247 /*
248 * Number of extents in this block group used for swap files.
249 * All accesses protected by the spinlock 'lock'.
250 */
251 int swap_extents;
252
253 /*
254 * Allocation offset for the block group to implement sequential
255 * allocation. This is used only on a zoned filesystem.
256 */
257 u64 alloc_offset;
258 u64 zone_unusable;
259 u64 zone_capacity;
260 u64 meta_write_pointer;
261 struct btrfs_chunk_map *physical_map;
262 struct list_head active_bg_list;
263 struct work_struct zone_finish_work;
264 struct extent_buffer *last_eb;
265 enum btrfs_block_group_size_class size_class;
266 u64 reclaim_mark;
267};
268
269static inline u64 btrfs_block_group_end(const struct btrfs_block_group *block_group)
270{
271 return (block_group->start + block_group->length);
272}
273
274static inline bool btrfs_is_block_group_used(const struct btrfs_block_group *bg)
275{
276 lockdep_assert_held(&bg->lock);
277
278 return (bg->used > 0 || bg->reserved > 0 || bg->pinned > 0);
279}
280
281static inline bool btrfs_is_block_group_data_only(const struct btrfs_block_group *block_group)
282{
283 /*
284 * In mixed mode the fragmentation is expected to be high, lowering the
285 * efficiency, so only proper data block groups are considered.
286 */
287 return (block_group->flags & BTRFS_BLOCK_GROUP_DATA) &&
288 !(block_group->flags & BTRFS_BLOCK_GROUP_METADATA);
289}
290
291#ifdef CONFIG_BTRFS_DEBUG
292int btrfs_should_fragment_free_space(const struct btrfs_block_group *block_group);
293#endif
294
295struct btrfs_block_group *btrfs_lookup_first_block_group(
296 struct btrfs_fs_info *info, u64 bytenr);
297struct btrfs_block_group *btrfs_lookup_block_group(
298 struct btrfs_fs_info *info, u64 bytenr);
299struct btrfs_block_group *btrfs_next_block_group(
300 struct btrfs_block_group *cache);
301void btrfs_get_block_group(struct btrfs_block_group *cache);
302void btrfs_put_block_group(struct btrfs_block_group *cache);
303void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
304 const u64 start);
305void btrfs_wait_block_group_reservations(struct btrfs_block_group *bg);
306struct btrfs_block_group *btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info,
307 u64 bytenr);
308void btrfs_dec_nocow_writers(struct btrfs_block_group *bg);
309void btrfs_wait_nocow_writers(struct btrfs_block_group *bg);
310void btrfs_wait_block_group_cache_progress(struct btrfs_block_group *cache,
311 u64 num_bytes);
312int btrfs_cache_block_group(struct btrfs_block_group *cache, bool wait);
313struct btrfs_caching_control *btrfs_get_caching_control(
314 struct btrfs_block_group *cache);
315int btrfs_add_new_free_space(struct btrfs_block_group *block_group,
316 u64 start, u64 end, u64 *total_added_ret);
317struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
318 struct btrfs_fs_info *fs_info,
319 const u64 chunk_offset);
320int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
321 struct btrfs_chunk_map *map);
322void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
323void btrfs_mark_bg_unused(struct btrfs_block_group *bg);
324void btrfs_reclaim_bgs_work(struct work_struct *work);
325void btrfs_reclaim_bgs(struct btrfs_fs_info *fs_info);
326void btrfs_mark_bg_to_reclaim(struct btrfs_block_group *bg);
327int btrfs_read_block_groups(struct btrfs_fs_info *info);
328struct btrfs_block_group *btrfs_make_block_group(struct btrfs_trans_handle *trans,
329 u64 type,
330 u64 chunk_offset, u64 size);
331void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
332int btrfs_inc_block_group_ro(struct btrfs_block_group *cache,
333 bool do_chunk_alloc);
334void btrfs_dec_block_group_ro(struct btrfs_block_group *cache);
335int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
336int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
337int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
338int btrfs_update_block_group(struct btrfs_trans_handle *trans,
339 u64 bytenr, u64 num_bytes, bool alloc);
340int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
341 u64 ram_bytes, u64 num_bytes, int delalloc,
342 bool force_wrong_size_class);
343void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
344 u64 num_bytes, int delalloc);
345int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
346 enum btrfs_chunk_alloc_enum force);
347int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
348void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
349void btrfs_reserve_chunk_metadata(struct btrfs_trans_handle *trans,
350 bool is_item_insertion);
351u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
352void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
353int btrfs_free_block_groups(struct btrfs_fs_info *info);
354int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
355 u64 physical, u64 **logical, int *naddrs, int *stripe_len);
356
357static inline u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info)
358{
359 return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_DATA);
360}
361
362static inline u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info)
363{
364 return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_METADATA);
365}
366
367static inline u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info)
368{
369 return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_SYSTEM);
370}
371
372static inline int btrfs_block_group_done(const struct btrfs_block_group *cache)
373{
374 smp_mb();
375 return cache->cached == BTRFS_CACHE_FINISHED ||
376 cache->cached == BTRFS_CACHE_ERROR;
377}
378
379void btrfs_freeze_block_group(struct btrfs_block_group *cache);
380void btrfs_unfreeze_block_group(struct btrfs_block_group *cache);
381
382bool btrfs_inc_block_group_swap_extents(struct btrfs_block_group *bg);
383void btrfs_dec_block_group_swap_extents(struct btrfs_block_group *bg, int amount);
384
385enum btrfs_block_group_size_class btrfs_calc_block_group_size_class(u64 size);
386int btrfs_use_block_group_size_class(struct btrfs_block_group *bg,
387 enum btrfs_block_group_size_class size_class,
388 bool force_wrong_size_class);
389bool btrfs_block_group_should_use_size_class(const struct btrfs_block_group *bg);
390
391#endif /* BTRFS_BLOCK_GROUP_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef BTRFS_BLOCK_GROUP_H
4#define BTRFS_BLOCK_GROUP_H
5
6#include "free-space-cache.h"
7
8enum btrfs_disk_cache_state {
9 BTRFS_DC_WRITTEN,
10 BTRFS_DC_ERROR,
11 BTRFS_DC_CLEAR,
12 BTRFS_DC_SETUP,
13};
14
15/*
16 * This describes the state of the block_group for async discard. This is due
17 * to the two pass nature of it where extent discarding is prioritized over
18 * bitmap discarding. BTRFS_DISCARD_RESET_CURSOR is set when we are resetting
19 * between lists to prevent contention for discard state variables
20 * (eg. discard_cursor).
21 */
22enum btrfs_discard_state {
23 BTRFS_DISCARD_EXTENTS,
24 BTRFS_DISCARD_BITMAPS,
25 BTRFS_DISCARD_RESET_CURSOR,
26};
27
28/*
29 * Control flags for do_chunk_alloc's force field CHUNK_ALLOC_NO_FORCE means to
30 * only allocate a chunk if we really need one.
31 *
32 * CHUNK_ALLOC_LIMITED means to only try and allocate one if we have very few
33 * chunks already allocated. This is used as part of the clustering code to
34 * help make sure we have a good pool of storage to cluster in, without filling
35 * the FS with empty chunks
36 *
37 * CHUNK_ALLOC_FORCE means it must try to allocate one
38 *
39 * CHUNK_ALLOC_FORCE_FOR_EXTENT like CHUNK_ALLOC_FORCE but called from
40 * find_free_extent() that also activaes the zone
41 */
42enum btrfs_chunk_alloc_enum {
43 CHUNK_ALLOC_NO_FORCE,
44 CHUNK_ALLOC_LIMITED,
45 CHUNK_ALLOC_FORCE,
46 CHUNK_ALLOC_FORCE_FOR_EXTENT,
47};
48
49/* Block group flags set at runtime */
50enum btrfs_block_group_flags {
51 BLOCK_GROUP_FLAG_IREF,
52 BLOCK_GROUP_FLAG_REMOVED,
53 BLOCK_GROUP_FLAG_TO_COPY,
54 BLOCK_GROUP_FLAG_RELOCATING_REPAIR,
55 BLOCK_GROUP_FLAG_CHUNK_ITEM_INSERTED,
56 BLOCK_GROUP_FLAG_ZONE_IS_ACTIVE,
57 BLOCK_GROUP_FLAG_ZONED_DATA_RELOC,
58 /* Does the block group need to be added to the free space tree? */
59 BLOCK_GROUP_FLAG_NEEDS_FREE_SPACE,
60 /* Indicate that the block group is placed on a sequential zone */
61 BLOCK_GROUP_FLAG_SEQUENTIAL_ZONE,
62};
63
64enum btrfs_caching_type {
65 BTRFS_CACHE_NO,
66 BTRFS_CACHE_STARTED,
67 BTRFS_CACHE_FINISHED,
68 BTRFS_CACHE_ERROR,
69};
70
71struct btrfs_caching_control {
72 struct list_head list;
73 struct mutex mutex;
74 wait_queue_head_t wait;
75 struct btrfs_work work;
76 struct btrfs_block_group *block_group;
77 refcount_t count;
78};
79
80/* Once caching_thread() finds this much free space, it will wake up waiters. */
81#define CACHING_CTL_WAKE_UP SZ_2M
82
83/*
84 * Tree to record all locked full stripes of a RAID5/6 block group
85 */
86struct btrfs_full_stripe_locks_tree {
87 struct rb_root root;
88 struct mutex lock;
89};
90
91struct btrfs_block_group {
92 struct btrfs_fs_info *fs_info;
93 struct inode *inode;
94 spinlock_t lock;
95 u64 start;
96 u64 length;
97 u64 pinned;
98 u64 reserved;
99 u64 used;
100 u64 delalloc_bytes;
101 u64 bytes_super;
102 u64 flags;
103 u64 cache_generation;
104 u64 global_root_id;
105
106 /*
107 * The last committed used bytes of this block group, if the above @used
108 * is still the same as @commit_used, we don't need to update block
109 * group item of this block group.
110 */
111 u64 commit_used;
112 /*
113 * If the free space extent count exceeds this number, convert the block
114 * group to bitmaps.
115 */
116 u32 bitmap_high_thresh;
117
118 /*
119 * If the free space extent count drops below this number, convert the
120 * block group back to extents.
121 */
122 u32 bitmap_low_thresh;
123
124 /*
125 * It is just used for the delayed data space allocation because
126 * only the data space allocation and the relative metadata update
127 * can be done cross the transaction.
128 */
129 struct rw_semaphore data_rwsem;
130
131 /* For raid56, this is a full stripe, without parity */
132 unsigned long full_stripe_len;
133 unsigned long runtime_flags;
134
135 unsigned int ro;
136
137 int disk_cache_state;
138
139 /* Cache tracking stuff */
140 int cached;
141 struct btrfs_caching_control *caching_ctl;
142
143 struct btrfs_space_info *space_info;
144
145 /* Free space cache stuff */
146 struct btrfs_free_space_ctl *free_space_ctl;
147
148 /* Block group cache stuff */
149 struct rb_node cache_node;
150
151 /* For block groups in the same raid type */
152 struct list_head list;
153
154 refcount_t refs;
155
156 /*
157 * List of struct btrfs_free_clusters for this block group.
158 * Today it will only have one thing on it, but that may change
159 */
160 struct list_head cluster_list;
161
162 /* For delayed block group creation or deletion of empty block groups */
163 struct list_head bg_list;
164
165 /* For read-only block groups */
166 struct list_head ro_list;
167
168 /*
169 * When non-zero it means the block group's logical address and its
170 * device extents can not be reused for future block group allocations
171 * until the counter goes down to 0. This is to prevent them from being
172 * reused while some task is still using the block group after it was
173 * deleted - we want to make sure they can only be reused for new block
174 * groups after that task is done with the deleted block group.
175 */
176 atomic_t frozen;
177
178 /* For discard operations */
179 struct list_head discard_list;
180 int discard_index;
181 u64 discard_eligible_time;
182 u64 discard_cursor;
183 enum btrfs_discard_state discard_state;
184
185 /* For dirty block groups */
186 struct list_head dirty_list;
187 struct list_head io_list;
188
189 struct btrfs_io_ctl io_ctl;
190
191 /*
192 * Incremented when doing extent allocations and holding a read lock
193 * on the space_info's groups_sem semaphore.
194 * Decremented when an ordered extent that represents an IO against this
195 * block group's range is created (after it's added to its inode's
196 * root's list of ordered extents) or immediately after the allocation
197 * if it's a metadata extent or fallocate extent (for these cases we
198 * don't create ordered extents).
199 */
200 atomic_t reservations;
201
202 /*
203 * Incremented while holding the spinlock *lock* by a task checking if
204 * it can perform a nocow write (incremented if the value for the *ro*
205 * field is 0). Decremented by such tasks once they create an ordered
206 * extent or before that if some error happens before reaching that step.
207 * This is to prevent races between block group relocation and nocow
208 * writes through direct IO.
209 */
210 atomic_t nocow_writers;
211
212 /* Lock for free space tree operations. */
213 struct mutex free_space_lock;
214
215 /*
216 * Number of extents in this block group used for swap files.
217 * All accesses protected by the spinlock 'lock'.
218 */
219 int swap_extents;
220
221 /* Record locked full stripes for RAID5/6 block group */
222 struct btrfs_full_stripe_locks_tree full_stripe_locks_root;
223
224 /*
225 * Allocation offset for the block group to implement sequential
226 * allocation. This is used only on a zoned filesystem.
227 */
228 u64 alloc_offset;
229 u64 zone_unusable;
230 u64 zone_capacity;
231 u64 meta_write_pointer;
232 struct map_lookup *physical_map;
233 struct list_head active_bg_list;
234 struct work_struct zone_finish_work;
235 struct extent_buffer *last_eb;
236};
237
238static inline u64 btrfs_block_group_end(struct btrfs_block_group *block_group)
239{
240 return (block_group->start + block_group->length);
241}
242
243static inline bool btrfs_is_block_group_data_only(
244 struct btrfs_block_group *block_group)
245{
246 /*
247 * In mixed mode the fragmentation is expected to be high, lowering the
248 * efficiency, so only proper data block groups are considered.
249 */
250 return (block_group->flags & BTRFS_BLOCK_GROUP_DATA) &&
251 !(block_group->flags & BTRFS_BLOCK_GROUP_METADATA);
252}
253
254#ifdef CONFIG_BTRFS_DEBUG
255int btrfs_should_fragment_free_space(struct btrfs_block_group *block_group);
256#endif
257
258struct btrfs_block_group *btrfs_lookup_first_block_group(
259 struct btrfs_fs_info *info, u64 bytenr);
260struct btrfs_block_group *btrfs_lookup_block_group(
261 struct btrfs_fs_info *info, u64 bytenr);
262struct btrfs_block_group *btrfs_next_block_group(
263 struct btrfs_block_group *cache);
264void btrfs_get_block_group(struct btrfs_block_group *cache);
265void btrfs_put_block_group(struct btrfs_block_group *cache);
266void btrfs_dec_block_group_reservations(struct btrfs_fs_info *fs_info,
267 const u64 start);
268void btrfs_wait_block_group_reservations(struct btrfs_block_group *bg);
269struct btrfs_block_group *btrfs_inc_nocow_writers(struct btrfs_fs_info *fs_info,
270 u64 bytenr);
271void btrfs_dec_nocow_writers(struct btrfs_block_group *bg);
272void btrfs_wait_nocow_writers(struct btrfs_block_group *bg);
273void btrfs_wait_block_group_cache_progress(struct btrfs_block_group *cache,
274 u64 num_bytes);
275int btrfs_cache_block_group(struct btrfs_block_group *cache, bool wait);
276void btrfs_put_caching_control(struct btrfs_caching_control *ctl);
277struct btrfs_caching_control *btrfs_get_caching_control(
278 struct btrfs_block_group *cache);
279u64 add_new_free_space(struct btrfs_block_group *block_group,
280 u64 start, u64 end);
281struct btrfs_trans_handle *btrfs_start_trans_remove_block_group(
282 struct btrfs_fs_info *fs_info,
283 const u64 chunk_offset);
284int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
285 u64 group_start, struct extent_map *em);
286void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info);
287void btrfs_mark_bg_unused(struct btrfs_block_group *bg);
288void btrfs_reclaim_bgs_work(struct work_struct *work);
289void btrfs_reclaim_bgs(struct btrfs_fs_info *fs_info);
290void btrfs_mark_bg_to_reclaim(struct btrfs_block_group *bg);
291int btrfs_read_block_groups(struct btrfs_fs_info *info);
292struct btrfs_block_group *btrfs_make_block_group(struct btrfs_trans_handle *trans,
293 u64 bytes_used, u64 type,
294 u64 chunk_offset, u64 size);
295void btrfs_create_pending_block_groups(struct btrfs_trans_handle *trans);
296int btrfs_inc_block_group_ro(struct btrfs_block_group *cache,
297 bool do_chunk_alloc);
298void btrfs_dec_block_group_ro(struct btrfs_block_group *cache);
299int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
300int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
301int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
302int btrfs_update_block_group(struct btrfs_trans_handle *trans,
303 u64 bytenr, u64 num_bytes, bool alloc);
304int btrfs_add_reserved_bytes(struct btrfs_block_group *cache,
305 u64 ram_bytes, u64 num_bytes, int delalloc);
306void btrfs_free_reserved_bytes(struct btrfs_block_group *cache,
307 u64 num_bytes, int delalloc);
308int btrfs_chunk_alloc(struct btrfs_trans_handle *trans, u64 flags,
309 enum btrfs_chunk_alloc_enum force);
310int btrfs_force_chunk_alloc(struct btrfs_trans_handle *trans, u64 type);
311void check_system_chunk(struct btrfs_trans_handle *trans, const u64 type);
312void btrfs_reserve_chunk_metadata(struct btrfs_trans_handle *trans,
313 bool is_item_insertion);
314u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
315void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
316int btrfs_free_block_groups(struct btrfs_fs_info *info);
317int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
318 struct block_device *bdev, u64 physical, u64 **logical,
319 int *naddrs, int *stripe_len);
320
321static inline u64 btrfs_data_alloc_profile(struct btrfs_fs_info *fs_info)
322{
323 return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_DATA);
324}
325
326static inline u64 btrfs_metadata_alloc_profile(struct btrfs_fs_info *fs_info)
327{
328 return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_METADATA);
329}
330
331static inline u64 btrfs_system_alloc_profile(struct btrfs_fs_info *fs_info)
332{
333 return btrfs_get_alloc_profile(fs_info, BTRFS_BLOCK_GROUP_SYSTEM);
334}
335
336static inline int btrfs_block_group_done(struct btrfs_block_group *cache)
337{
338 smp_mb();
339 return cache->cached == BTRFS_CACHE_FINISHED ||
340 cache->cached == BTRFS_CACHE_ERROR;
341}
342
343void btrfs_freeze_block_group(struct btrfs_block_group *cache);
344void btrfs_unfreeze_block_group(struct btrfs_block_group *cache);
345
346bool btrfs_inc_block_group_swap_extents(struct btrfs_block_group *bg);
347void btrfs_dec_block_group_swap_extents(struct btrfs_block_group *bg, int amount);
348
349#endif /* BTRFS_BLOCK_GROUP_H */