diff options
Diffstat (limited to 'drivers/md/bcache/bcache.h')
| -rw-r--r-- | drivers/md/bcache/bcache.h | 469 |
1 files changed, 87 insertions, 382 deletions
diff --git a/drivers/md/bcache/bcache.h b/drivers/md/bcache/bcache.h index 0f12382aa35..d2ebcf32309 100644 --- a/drivers/md/bcache/bcache.h +++ b/drivers/md/bcache/bcache.h @@ -177,6 +177,7 @@ #define pr_fmt(fmt) "bcache: %s() " fmt "\n", __func__ +#include <linux/bcache.h> #include <linux/bio.h> #include <linux/kobject.h> #include <linux/list.h> @@ -186,6 +187,7 @@ #include <linux/types.h> #include <linux/workqueue.h> +#include "bset.h" #include "util.h" #include "closure.h" @@ -193,10 +195,8 @@ struct bucket { atomic_t pin; uint16_t prio; uint8_t gen; - uint8_t disk_gen; uint8_t last_gc; /* Most out of date gen in the btree */ - uint8_t gc_gen; - uint16_t gc_mark; + uint16_t gc_mark; /* Bitfield used by GC. See below for field */ }; /* @@ -205,172 +205,13 @@ struct bucket { */ BITMASK(GC_MARK, struct bucket, gc_mark, 0, 2); -#define GC_MARK_RECLAIMABLE 0 -#define GC_MARK_DIRTY 1 -#define GC_MARK_METADATA 2 -BITMASK(GC_SECTORS_USED, struct bucket, gc_mark, 2, 14); - -struct bkey { - uint64_t high; - uint64_t low; - uint64_t ptr[]; -}; - -/* Enough for a key with 6 pointers */ -#define BKEY_PAD 8 - -#define BKEY_PADDED(key) \ - union { struct bkey key; uint64_t key ## _pad[BKEY_PAD]; } - -/* Version 0: Cache device - * Version 1: Backing device - * Version 2: Seed pointer into btree node checksum - * Version 3: Cache device with new UUID format - * Version 4: Backing device with data offset - */ -#define BCACHE_SB_VERSION_CDEV 0 -#define BCACHE_SB_VERSION_BDEV 1 -#define BCACHE_SB_VERSION_CDEV_WITH_UUID 3 -#define BCACHE_SB_VERSION_BDEV_WITH_OFFSET 4 -#define BCACHE_SB_MAX_VERSION 4 - -#define SB_SECTOR 8 -#define SB_SIZE 4096 -#define SB_LABEL_SIZE 32 -#define SB_JOURNAL_BUCKETS 256U -/* SB_JOURNAL_BUCKETS must be divisible by BITS_PER_LONG */ -#define MAX_CACHES_PER_SET 8 - -#define BDEV_DATA_START_DEFAULT 16 /* sectors */ - -struct cache_sb { - uint64_t csum; - uint64_t offset; /* sector where this sb was written */ - uint64_t version; - - uint8_t magic[16]; - - uint8_t uuid[16]; - union { - uint8_t set_uuid[16]; - uint64_t set_magic; - }; - uint8_t label[SB_LABEL_SIZE]; - - uint64_t flags; - uint64_t seq; - uint64_t pad[8]; - - union { - struct { - /* Cache devices */ - uint64_t nbuckets; /* device size */ - - uint16_t block_size; /* sectors */ - uint16_t bucket_size; /* sectors */ - - uint16_t nr_in_set; - uint16_t nr_this_dev; - }; - struct { - /* Backing devices */ - uint64_t data_offset; - - /* - * block_size from the cache device section is still used by - * backing devices, so don't add anything here until we fix - * things to not need it for backing devices anymore - */ - }; - }; - - uint32_t last_mount; /* time_t */ - - uint16_t first_bucket; - union { - uint16_t njournal_buckets; - uint16_t keys; - }; - uint64_t d[SB_JOURNAL_BUCKETS]; /* journal buckets */ -}; - -BITMASK(CACHE_SYNC, struct cache_sb, flags, 0, 1); -BITMASK(CACHE_DISCARD, struct cache_sb, flags, 1, 1); -BITMASK(CACHE_REPLACEMENT, struct cache_sb, flags, 2, 3); -#define CACHE_REPLACEMENT_LRU 0U -#define CACHE_REPLACEMENT_FIFO 1U -#define CACHE_REPLACEMENT_RANDOM 2U - -BITMASK(BDEV_CACHE_MODE, struct cache_sb, flags, 0, 4); -#define CACHE_MODE_WRITETHROUGH 0U -#define CACHE_MODE_WRITEBACK 1U -#define CACHE_MODE_WRITEAROUND 2U -#define CACHE_MODE_NONE 3U -BITMASK(BDEV_STATE, struct cache_sb, flags, 61, 2); -#define BDEV_STATE_NONE 0U -#define BDEV_STATE_CLEAN 1U -#define BDEV_STATE_DIRTY 2U -#define BDEV_STATE_STALE 3U - -/* Version 1: Seed pointer into btree node checksum - */ -#define BCACHE_BSET_VERSION 1 - -/* - * This is the on disk format for btree nodes - a btree node on disk is a list - * of these; within each set the keys are sorted - */ -struct bset { - uint64_t csum; - uint64_t magic; - uint64_t seq; - uint32_t version; - uint32_t keys; - - union { - struct bkey start[0]; - uint64_t d[0]; - }; -}; - -/* - * On disk format for priorities and gens - see super.c near prio_write() for - * more. - */ -struct prio_set { - uint64_t csum; - uint64_t magic; - uint64_t seq; - uint32_t version; - uint32_t pad; - - uint64_t next_bucket; - - struct bucket_disk { - uint16_t prio; - uint8_t gen; - } __attribute((packed)) data[]; -}; - -struct uuid_entry { - union { - struct { - uint8_t uuid[16]; - uint8_t label[32]; - uint32_t first_reg; - uint32_t last_reg; - uint32_t invalidated; - - uint32_t flags; - /* Size of flash only volumes */ - uint64_t sectors; - }; - - uint8_t pad[128]; - }; -}; - -BITMASK(UUID_FLASH_ONLY, struct uuid_entry, flags, 0, 1); +#define GC_MARK_RECLAIMABLE 1 +#define GC_MARK_DIRTY 2 +#define GC_MARK_METADATA 3 +#define GC_SECTORS_USED_SIZE 13 +#define MAX_GC_SECTORS_USED (~(~0ULL << GC_SECTORS_USED_SIZE)) +BITMASK(GC_SECTORS_USED, struct bucket, gc_mark, 2, GC_SECTORS_USED_SIZE); +BITMASK(GC_MOVE, struct bucket, gc_mark, 15, 1); #include "journal.h" #include "stats.h" @@ -384,8 +225,6 @@ struct keybuf_key { void *private; }; -typedef bool (keybuf_pred_fn)(struct keybuf *, struct bkey *); - struct keybuf { struct bkey last_scanned; spinlock_t lock; @@ -400,7 +239,7 @@ struct keybuf { struct rb_root keys; -#define KEYBUF_NR 100 +#define KEYBUF_NR 500 DECLARE_ARRAY_ALLOCATOR(struct keybuf_key, freelist, KEYBUF_NR); }; @@ -429,21 +268,19 @@ struct bcache_device { struct gendisk *disk; - /* If nonzero, we're closing */ - atomic_t closing; - - /* If nonzero, we're detaching/unregistering from cache set */ - atomic_t detaching; - int flush_done; + unsigned long flags; +#define BCACHE_DEV_CLOSING 0 +#define BCACHE_DEV_DETACHING 1 +#define BCACHE_DEV_UNLINK_DONE 2 - uint64_t nr_stripes; - unsigned stripe_size_bits; + unsigned nr_stripes; + unsigned stripe_size; atomic_t *stripe_sectors_dirty; + unsigned long *full_dirty_stripes; unsigned long sectors_dirty_last; long sectors_dirty_derivative; - mempool_t *unaligned_bvec; struct bio_set *bio_split; unsigned data_csum:1; @@ -473,7 +310,8 @@ struct cached_dev { struct cache_sb sb; struct bio sb_bio; struct bio_vec sb_bv[1]; - struct closure_with_waitlist sb_write; + struct closure sb_write; + struct semaphore sb_write_mutex; /* Refcount on the cache set. Always nonzero when we're caching. */ atomic_t count; @@ -509,7 +347,7 @@ struct cached_dev { /* Limit number of writeback bios in flight */ struct semaphore in_flight; - struct closure_with_timer writeback; + struct task_struct *writeback_thread; struct keybuf writeback_keys; @@ -527,8 +365,8 @@ struct cached_dev { unsigned sequential_cutoff; unsigned readahead; - unsigned sequential_merge:1; unsigned verify:1; + unsigned bypass_torture_test:1; unsigned partial_stripes_expensive:1; unsigned writeback_metadata:1; @@ -536,22 +374,22 @@ struct cached_dev { unsigned char writeback_percent; unsigned writeback_delay; - int writeback_rate_change; - int64_t writeback_rate_derivative; uint64_t writeback_rate_target; + int64_t writeback_rate_proportional; + int64_t writeback_rate_derivative; + int64_t writeback_rate_change; unsigned writeback_rate_update_seconds; unsigned writeback_rate_d_term; unsigned writeback_rate_p_term_inverse; - unsigned writeback_rate_d_smooth; }; -enum alloc_watermarks { - WATERMARK_PRIO, - WATERMARK_METADATA, - WATERMARK_MOVINGGC, - WATERMARK_NONE, - WATERMARK_MAX +enum alloc_reserve { + RESERVE_BTREE, + RESERVE_PRIO, + RESERVE_MOVINGGC, + RESERVE_NONE, + RESERVE_NR, }; struct cache { @@ -563,8 +401,6 @@ struct cache { struct kobject kobj; struct block_device *bdev; - unsigned watermark[WATERMARK_MAX]; - struct task_struct *alloc_thread; struct closure prio; @@ -588,14 +424,9 @@ struct cache { * their new gen to disk. After prio_write() finishes writing the new * gens/prios, they'll be moved to the free list (and possibly discarded * in the process) - * - * unused: GC found nothing pointing into these buckets (possibly - * because all the data they contained was overwritten), so we only - * need to discard them before they can be moved to the free list. */ - DECLARE_FIFO(long, free); + DECLARE_FIFO(long, free)[RESERVE_NR]; DECLARE_FIFO(long, free_inc); - DECLARE_FIFO(long, unused); size_t fifo_last_bucket; @@ -605,13 +436,6 @@ struct cache { DECLARE_HEAP(struct bucket *, heap); /* - * max(gen - disk_gen) for all buckets. When it gets too big we have to - * call prio_write() to keep gens from wrapping. - */ - uint8_t need_save_prio; - unsigned gc_move_threshold; - - /* * If nonzero, we know we aren't going to find any buckets to invalidate * until a gc finishes - otherwise we could pointlessly burn a ton of * cpu @@ -620,15 +444,6 @@ struct cache { bool discard; /* Get rid of? */ - /* - * We preallocate structs for issuing discards to buckets, and keep them - * on this list when they're not in use; do_discard() issues discards - * whenever there's work to do and is called by free_some_buckets() and - * when a discard finishes. - */ - atomic_t discards_in_flight; - struct list_head discards; - struct journal_device journal; /* The rest of this all shows up in sysfs */ @@ -649,7 +464,6 @@ struct gc_stat { size_t nkeys; uint64_t data; /* sectors */ - uint64_t dirty; /* sectors */ unsigned in_use; /* percent */ }; @@ -689,7 +503,8 @@ struct cache_set { uint64_t cached_dev_sectors; struct closure caching; - struct closure_with_waitlist sb_write; + struct closure sb_write; + struct semaphore sb_write_mutex; mempool_t *search; mempool_t *bio_meta; @@ -734,19 +549,16 @@ struct cache_set { struct list_head btree_cache_freed; /* Number of elements in btree_cache + btree_cache_freeable lists */ - unsigned bucket_cache_used; + unsigned btree_cache_used; /* * If we need to allocate memory for a new btree node and that * allocation fails, we can cannibalize another node in the btree cache - * to satisfy the allocation. However, only one thread can be doing this - * at a time, for obvious reasons - try_harder and try_wait are - * basically a lock for this that we can wait on asynchronously. The - * btree_root() macro releases the lock when it returns. + * to satisfy the allocation - lock to guarantee only one thread does + * this at a time: */ - struct closure *try_harder; - struct closure_waitlist try_wait; - uint64_t try_harder_start; + wait_queue_head_t btree_cache_wait; + struct task_struct *btree_cache_alloc_lock; /* * When we free a btree node, we increment the gen of the bucket the @@ -759,7 +571,7 @@ struct cache_set { * written. */ atomic_t prio_blocked; - struct closure_waitlist bucket_wait; + wait_queue_head_t bucket_wait; /* * For any bio we don't skip we subtract the number of sectors from @@ -775,14 +587,14 @@ struct cache_set { uint16_t min_prio; /* - * max(gen - gc_gen) for all buckets. When it gets too big we have to gc + * max(gen - last_gc) for all buckets. When it gets too big we have to gc * to keep gens from wrapping around. */ uint8_t need_gc; struct gc_stat gc_stats; size_t nbuckets; - struct closure_with_waitlist gc; + struct task_struct *gc_thread; /* Where in the btree gc currently is */ struct bkey gc_done; @@ -795,23 +607,26 @@ struct cache_set { /* Counts how many sectors bio_insert has added to the cache */ atomic_t sectors_to_gc; - struct closure moving_gc; - struct closure_waitlist moving_gc_wait; + wait_queue_head_t moving_gc_wait; struct keybuf moving_gc_keys; /* Number of moving GC bios in flight */ - atomic_t in_flight; + struct semaphore moving_in_flight; + + struct workqueue_struct *moving_gc_wq; struct btree *root; #ifdef CONFIG_BCACHE_DEBUG struct btree *verify_data; + struct bset *verify_ondisk; struct mutex verify_lock; #endif unsigned nr_uuids; struct uuid_entry *uuids; BKEY_PADDED(uuid_bucket); - struct closure_with_waitlist uuid_write; + struct closure uuid_write; + struct semaphore uuid_write_mutex; /* * A btree node on disk could have too many bsets for an iterator to fit @@ -819,13 +634,7 @@ struct cache_set { */ mempool_t *fill_iter; - /* - * btree_sort() is a merge sort and requires temporary space - single - * element mempool - */ - struct mutex sort_lock; - struct bset *sort; - unsigned sort_crit_factor; + struct bset_sort_state sort; /* List of buckets we're currently writing data to */ struct list_head data_buckets; @@ -841,20 +650,23 @@ struct cache_set { unsigned congested_read_threshold_us; unsigned congested_write_threshold_us; - spinlock_t sort_time_lock; - struct time_stats sort_time; struct time_stats btree_gc_time; struct time_stats btree_split_time; - spinlock_t btree_read_time_lock; struct time_stats btree_read_time; - struct time_stats try_harder_time; atomic_long_t cache_read_races; atomic_long_t writeback_keys_done; atomic_long_t writeback_keys_failed; + + enum { + ON_ERROR_UNREGISTER, + ON_ERROR_PANIC, + } on_error; unsigned error_limit; unsigned error_decay; + unsigned short journal_delay_ms; + bool expensive_debug_checks; unsigned verify:1; unsigned key_merging_disabled:1; unsigned gc_always_rewrite:1; @@ -865,21 +677,6 @@ struct cache_set { struct hlist_head bucket_hash[1 << BUCKET_HASH_BITS]; }; -static inline bool key_merging_disabled(struct cache_set *c) -{ -#ifdef CONFIG_BCACHE_DEBUG - return c->key_merging_disabled; -#else - return 0; -#endif -} - -static inline bool SB_IS_BDEV(const struct cache_sb *sb) -{ - return sb->version == BCACHE_SB_VERSION_BDEV - || sb->version == BCACHE_SB_VERSION_BDEV_WITH_OFFSET; -} - struct bbio { unsigned submit_time_us; union { @@ -893,13 +690,8 @@ struct bbio { struct bio bio; }; -static inline unsigned local_clock_us(void) -{ - return local_clock() >> 10; -} - #define BTREE_PRIO USHRT_MAX -#define INITIAL_PRIO 32768 +#define INITIAL_PRIO 32768U #define btree_bytes(c) ((c)->btree_pages * PAGE_SIZE) #define btree_blocks(b) \ @@ -912,80 +704,12 @@ static inline unsigned local_clock_us(void) #define bucket_bytes(c) ((c)->sb.bucket_size << 9) #define block_bytes(c) ((c)->sb.block_size << 9) -#define __set_bytes(i, k) (sizeof(*(i)) + (k) * sizeof(uint64_t)) -#define set_bytes(i) __set_bytes(i, i->keys) - -#define __set_blocks(i, k, c) DIV_ROUND_UP(__set_bytes(i, k), block_bytes(c)) -#define set_blocks(i, c) __set_blocks(i, (i)->keys, c) - -#define node(i, j) ((struct bkey *) ((i)->d + (j))) -#define end(i) node(i, (i)->keys) - -#define index(i, b) \ - ((size_t) (((void *) i - (void *) (b)->sets[0].data) / \ - block_bytes(b->c))) - -#define btree_data_space(b) (PAGE_SIZE << (b)->page_order) - #define prios_per_bucket(c) \ ((bucket_bytes(c) - sizeof(struct prio_set)) / \ sizeof(struct bucket_disk)) #define prio_buckets(c) \ DIV_ROUND_UP((size_t) (c)->sb.nbuckets, prios_per_bucket(c)) -#define JSET_MAGIC 0x245235c1a3625032ULL -#define PSET_MAGIC 0x6750e15f87337f91ULL -#define BSET_MAGIC 0x90135c78b99e07f5ULL - -#define jset_magic(c) ((c)->sb.set_magic ^ JSET_MAGIC) -#define pset_magic(c) ((c)->sb.set_magic ^ PSET_MAGIC) -#define bset_magic(c) ((c)->sb.set_magic ^ BSET_MAGIC) - -/* Bkey fields: all units are in sectors */ - -#define KEY_FIELD(name, field, offset, size) \ - BITMASK(name, struct bkey, field, offset, size) - -#define PTR_FIELD(name, offset, size) \ - static inline uint64_t name(const struct bkey *k, unsigned i) \ - { return (k->ptr[i] >> offset) & ~(((uint64_t) ~0) << size); } \ - \ - static inline void SET_##name(struct bkey *k, unsigned i, uint64_t v)\ - { \ - k->ptr[i] &= ~(~((uint64_t) ~0 << size) << offset); \ - k->ptr[i] |= v << offset; \ - } - -KEY_FIELD(KEY_PTRS, high, 60, 3) -KEY_FIELD(HEADER_SIZE, high, 58, 2) -KEY_FIELD(KEY_CSUM, high, 56, 2) -KEY_FIELD(KEY_PINNED, high, 55, 1) -KEY_FIELD(KEY_DIRTY, high, 36, 1) - -KEY_FIELD(KEY_SIZE, high, 20, 16) -KEY_FIELD(KEY_INODE, high, 0, 20) - -/* Next time I change the on disk format, KEY_OFFSET() won't be 64 bits */ - -static inline uint64_t KEY_OFFSET(const struct bkey *k) -{ - return k->low; -} - -static inline void SET_KEY_OFFSET(struct bkey *k, uint64_t v) -{ - k->low = v; -} - -PTR_FIELD(PTR_DEV, 51, 12) -PTR_FIELD(PTR_OFFSET, 8, 43) -PTR_FIELD(PTR_GEN, 0, 8) - -#define PTR_CHECK_DEV ((1 << 12) - 1) - -#define PTR(gen, offset, dev) \ - ((((uint64_t) dev) << 51) | ((uint64_t) offset) << 8 | gen) - static inline size_t sector_to_bucket(struct cache_set *c, sector_t s) { return s >> c->bucket_bits; @@ -1022,28 +746,25 @@ static inline struct bucket *PTR_BUCKET(struct cache_set *c, return PTR_CACHE(c, k, ptr)->buckets + PTR_BUCKET_NR(c, k, ptr); } -/* Btree key macros */ +static inline uint8_t gen_after(uint8_t a, uint8_t b) +{ + uint8_t r = a - b; + return r > 128U ? 0 : r; +} -/* - * The high bit being set is a relic from when we used it to do binary - * searches - it told you where a key started. It's not used anymore, - * and can probably be safely dropped. - */ -#define KEY(dev, sector, len) \ -((struct bkey) { \ - .high = (1ULL << 63) | ((uint64_t) (len) << 20) | (dev), \ - .low = (sector) \ -}) +static inline uint8_t ptr_stale(struct cache_set *c, const struct bkey *k, + unsigned i) +{ + return gen_after(PTR_BUCKET(c, k, i)->gen, PTR_GEN(k, i)); +} -static inline void bkey_init(struct bkey *k) +static inline bool ptr_available(struct cache_set *c, const struct bkey *k, + unsigned i) { - *k = KEY(0, 0, 0); + return (PTR_DEV(k, i) < MAX_CACHES_PER_SET) && PTR_CACHE(c, k, i); } -#define KEY_START(k) (KEY_OFFSET(k) - KEY_SIZE(k)) -#define START_KEY(k) KEY(KEY_INODE(k), KEY_START(k), 0) -#define MAX_KEY KEY(~(~0 << 20), ((uint64_t) ~0) >> 1, 0) -#define ZERO_KEY KEY(0, 0, 0) +/* Btree key macros */ /* * This is used for various on disk data structures - cache_sb, prio_set, bset, @@ -1051,7 +772,8 @@ static inline void bkey_init(struct bkey *k) */ #define csum_set(i) \ bch_crc64(((void *) (i)) + sizeof(uint64_t), \ - ((void *) end(i)) - (((void *) (i)) + sizeof(uint64_t))) + ((void *) bset_bkey_last(i)) - \ + (((void *) (i)) + sizeof(uint64_t))) /* Error handling macros */ @@ -1094,14 +816,6 @@ do { \ for (b = (ca)->buckets + (ca)->sb.first_bucket; \ b < (ca)->buckets + (ca)->sb.nbuckets; b++) -static inline void __bkey_put(struct cache_set *c, struct bkey *k) -{ - unsigned i; - - for (i = 0; i < KEY_PTRS(k); i++) - atomic_dec_bug(&PTR_BUCKET(c, k, i)->pin); -} - static inline void cached_dev_put(struct cached_dev *dc) { if (atomic_dec_and_test(&dc->count)) @@ -1114,16 +828,13 @@ static inline bool cached_dev_get(struct cached_dev *dc) return false; /* Paired with the mb in cached_dev_attach */ - smp_mb__after_atomic_inc(); + smp_mb__after_atomic(); return true; } /* * bucket_gc_gen() returns the difference between the bucket's current gen and * the oldest gen of any pointer into that bucket in the btree (last_gc). - * - * bucket_disk_gen() returns the difference between the current gen and the gen - * on disk; they're both used to make sure gens don't wrap around. */ static inline uint8_t bucket_gc_gen(struct bucket *b) @@ -1131,13 +842,7 @@ static inline uint8_t bucket_gc_gen(struct bucket *b) return b->gen - b->last_gc; } -static inline uint8_t bucket_disk_gen(struct bucket *b) -{ - return b->gen - b->disk_gen; -} - #define BUCKET_GC_GEN_MAX 96U -#define BUCKET_DISK_GEN_MAX 64U #define kobj_attribute_write(n, fn) \ static struct kobj_attribute ksysfs_##n = __ATTR(n, S_IWUSR, NULL, fn) @@ -1164,22 +869,26 @@ void bch_bbio_endio(struct cache_set *, struct bio *, int, const char *); void bch_bbio_free(struct bio *, struct cache_set *); struct bio *bch_bbio_alloc(struct cache_set *); -struct bio *bch_bio_split(struct bio *, int, gfp_t, struct bio_set *); void bch_generic_make_request(struct bio *, struct bio_split_pool *); void __bch_submit_bbio(struct bio *, struct cache_set *); void bch_submit_bbio(struct bio *, struct cache_set *, struct bkey *, unsigned); uint8_t bch_inc_gen(struct cache *, struct bucket *); void bch_rescale_priorities(struct cache_set *, int); -bool bch_bucket_add_unused(struct cache *, struct bucket *); -long bch_bucket_alloc(struct cache *, unsigned, struct closure *); +bool bch_can_invalidate_bucket(struct cache *, struct bucket *); +void __bch_invalidate_one_bucket(struct cache *, struct bucket *); + +void __bch_bucket_free(struct cache *, struct bucket *); void bch_bucket_free(struct cache_set *, struct bkey *); +long bch_bucket_alloc(struct cache *, unsigned, bool); int __bch_bucket_alloc_set(struct cache_set *, unsigned, - struct bkey *, int, struct closure *); + struct bkey *, int, bool); int bch_bucket_alloc_set(struct cache_set *, unsigned, - struct bkey *, int, struct closure *); + struct bkey *, int, bool); +bool bch_alloc_sectors(struct cache_set *, struct bkey *, unsigned, + unsigned, unsigned, bool); __printf(2, 3) bool bch_cache_set_error(struct cache_set *, const char *, ...); @@ -1187,7 +896,7 @@ bool bch_cache_set_error(struct cache_set *, const char *, ...); void bch_prio_write(struct cache *); void bch_write_bdev_super(struct cached_dev *, struct closure *); -extern struct workqueue_struct *bcache_wq, *bch_gc_wq; +extern struct workqueue_struct *bcache_wq; extern const char * const bch_cache_modes[]; extern struct mutex bch_register_lock; extern struct list_head bch_cache_sets; @@ -1220,18 +929,14 @@ struct cache_set *bch_cache_set_alloc(struct cache_sb *); void bch_btree_cache_free(struct cache_set *); int bch_btree_cache_alloc(struct cache_set *); void bch_moving_init_cache_set(struct cache_set *); +int bch_open_buckets_alloc(struct cache_set *); +void bch_open_buckets_free(struct cache_set *); int bch_cache_allocator_start(struct cache *ca); -void bch_cache_allocator_exit(struct cache *ca); -int bch_cache_allocator_init(struct cache *ca); void bch_debug_exit(void); int bch_debug_init(struct kobject *); -void bch_writeback_exit(void); -int bch_writeback_init(void); void bch_request_exit(void); int bch_request_init(void); -void bch_btree_exit(void); -int bch_btree_init(void); #endif /* _BCACHE_H */ |