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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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324 lines
8.5 KiB
C
324 lines
8.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Code for manipulating bucket marks for garbage collection.
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*
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* Copyright 2014 Datera, Inc.
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*/
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#ifndef _BUCKETS_H
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#define _BUCKETS_H
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#include "buckets_types.h"
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#include "super.h"
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#define for_each_bucket(_b, _buckets) \
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for (_b = (_buckets)->b + (_buckets)->first_bucket; \
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_b < (_buckets)->b + (_buckets)->nbuckets; _b++)
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#define bucket_cmpxchg(g, new, expr) \
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({ \
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struct bucket *_g = g; \
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u64 _v = atomic64_read(&(g)->_mark.v); \
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struct bucket_mark _old; \
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\
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do { \
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(new).v.counter = _old.v.counter = _v; \
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expr; \
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} while ((_v = atomic64_cmpxchg(&(_g)->_mark.v, \
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_old.v.counter, \
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(new).v.counter)) != _old.v.counter);\
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_old; \
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})
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static inline struct bucket_array *__bucket_array(struct bch_dev *ca,
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bool gc)
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{
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return rcu_dereference_check(ca->buckets[gc],
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!ca->fs ||
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percpu_rwsem_is_held(&ca->fs->mark_lock) ||
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lockdep_is_held(&ca->fs->gc_lock) ||
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lockdep_is_held(&ca->bucket_lock));
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}
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static inline struct bucket_array *bucket_array(struct bch_dev *ca)
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{
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return __bucket_array(ca, false);
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}
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static inline struct bucket *__bucket(struct bch_dev *ca, size_t b, bool gc)
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{
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struct bucket_array *buckets = __bucket_array(ca, gc);
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BUG_ON(b < buckets->first_bucket || b >= buckets->nbuckets);
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return buckets->b + b;
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}
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static inline struct bucket *bucket(struct bch_dev *ca, size_t b)
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{
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return __bucket(ca, b, false);
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}
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static inline void bucket_io_clock_reset(struct bch_fs *c, struct bch_dev *ca,
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size_t b, int rw)
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{
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bucket(ca, b)->io_time[rw] = c->bucket_clock[rw].hand;
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}
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static inline u16 bucket_last_io(struct bch_fs *c, struct bucket *g, int rw)
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{
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return c->bucket_clock[rw].hand - g->io_time[rw];
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}
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/*
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* bucket_gc_gen() returns the difference between the bucket's current gen and
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* the oldest gen of any pointer into that bucket in the btree.
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*/
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static inline u8 bucket_gc_gen(struct bch_dev *ca, size_t b)
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{
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struct bucket *g = bucket(ca, b);
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return g->mark.gen - g->oldest_gen;
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}
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static inline size_t PTR_BUCKET_NR(const struct bch_dev *ca,
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const struct bch_extent_ptr *ptr)
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{
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return sector_to_bucket(ca, ptr->offset);
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}
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static inline struct bucket *PTR_BUCKET(struct bch_dev *ca,
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const struct bch_extent_ptr *ptr,
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bool gc)
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{
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return __bucket(ca, PTR_BUCKET_NR(ca, ptr), gc);
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}
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static inline struct bucket_mark ptr_bucket_mark(struct bch_dev *ca,
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const struct bch_extent_ptr *ptr)
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{
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struct bucket_mark m;
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rcu_read_lock();
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m = READ_ONCE(PTR_BUCKET(ca, ptr, 0)->mark);
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rcu_read_unlock();
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return m;
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}
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static inline int gen_cmp(u8 a, u8 b)
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{
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return (s8) (a - b);
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}
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static inline int gen_after(u8 a, u8 b)
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{
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int r = gen_cmp(a, b);
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return r > 0 ? r : 0;
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}
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/**
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* ptr_stale() - check if a pointer points into a bucket that has been
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* invalidated.
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*/
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static inline u8 ptr_stale(struct bch_dev *ca,
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const struct bch_extent_ptr *ptr)
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{
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return gen_after(ptr_bucket_mark(ca, ptr).gen, ptr->gen);
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}
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static inline unsigned __ptr_disk_sectors(struct extent_ptr_decoded p,
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unsigned live_size)
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{
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return live_size && p.crc.compression_type
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? max(1U, DIV_ROUND_UP(live_size * p.crc.compressed_size,
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p.crc.uncompressed_size))
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: live_size;
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}
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static inline unsigned ptr_disk_sectors(struct extent_ptr_decoded p)
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{
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return __ptr_disk_sectors(p, p.crc.live_size);
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}
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/* bucket gc marks */
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static inline unsigned bucket_sectors_used(struct bucket_mark mark)
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{
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return mark.dirty_sectors + mark.cached_sectors;
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}
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static inline bool bucket_unused(struct bucket_mark mark)
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{
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return !mark.owned_by_allocator &&
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!mark.data_type &&
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!bucket_sectors_used(mark);
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}
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static inline bool is_available_bucket(struct bucket_mark mark)
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{
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return (!mark.owned_by_allocator &&
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!mark.dirty_sectors &&
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!mark.stripe);
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}
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static inline bool bucket_needs_journal_commit(struct bucket_mark m,
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u16 last_seq_ondisk)
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{
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return m.journal_seq_valid &&
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((s16) m.journal_seq - (s16) last_seq_ondisk > 0);
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}
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/* Device usage: */
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struct bch_dev_usage bch2_dev_usage_read(struct bch_fs *, struct bch_dev *);
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void bch2_dev_usage_from_buckets(struct bch_fs *);
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static inline u64 __dev_buckets_available(struct bch_dev *ca,
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struct bch_dev_usage stats)
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{
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u64 total = ca->mi.nbuckets - ca->mi.first_bucket;
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if (WARN_ONCE(stats.buckets_unavailable > total,
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"buckets_unavailable overflow (%llu > %llu)\n",
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stats.buckets_unavailable, total))
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return 0;
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return total - stats.buckets_unavailable;
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}
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/*
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* Number of reclaimable buckets - only for use by the allocator thread:
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*/
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static inline u64 dev_buckets_available(struct bch_fs *c, struct bch_dev *ca)
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{
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return __dev_buckets_available(ca, bch2_dev_usage_read(c, ca));
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}
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static inline u64 __dev_buckets_free(struct bch_dev *ca,
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struct bch_dev_usage stats)
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{
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return __dev_buckets_available(ca, stats) +
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fifo_used(&ca->free[RESERVE_NONE]) +
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fifo_used(&ca->free_inc);
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}
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static inline u64 dev_buckets_free(struct bch_fs *c, struct bch_dev *ca)
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{
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return __dev_buckets_free(ca, bch2_dev_usage_read(c, ca));
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}
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/* Filesystem usage: */
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static inline unsigned fs_usage_u64s(struct bch_fs *c)
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{
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return sizeof(struct bch_fs_usage) / sizeof(u64) +
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READ_ONCE(c->replicas.nr);
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}
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void bch2_fs_usage_scratch_put(struct bch_fs *, struct bch_fs_usage_online *);
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struct bch_fs_usage_online *bch2_fs_usage_scratch_get(struct bch_fs *);
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u64 bch2_fs_usage_read_one(struct bch_fs *, u64 *);
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struct bch_fs_usage_online *bch2_fs_usage_read(struct bch_fs *);
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void bch2_fs_usage_acc_to_base(struct bch_fs *, unsigned);
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void bch2_fs_usage_to_text(struct printbuf *,
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struct bch_fs *, struct bch_fs_usage_online *);
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u64 bch2_fs_sectors_used(struct bch_fs *, struct bch_fs_usage_online *);
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struct bch_fs_usage_short
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bch2_fs_usage_read_short(struct bch_fs *);
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/* key/bucket marking: */
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void bch2_bucket_seq_cleanup(struct bch_fs *);
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void bch2_fs_usage_initialize(struct bch_fs *);
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void bch2_invalidate_bucket(struct bch_fs *, struct bch_dev *,
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size_t, struct bucket_mark *);
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void bch2_mark_alloc_bucket(struct bch_fs *, struct bch_dev *,
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size_t, bool, struct gc_pos, unsigned);
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void bch2_mark_metadata_bucket(struct bch_fs *, struct bch_dev *,
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size_t, enum bch_data_type, unsigned,
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struct gc_pos, unsigned);
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#define BCH_BUCKET_MARK_GC (1 << 0)
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#define BCH_BUCKET_MARK_NOATOMIC (1 << 1)
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#define BCH_BUCKET_MARK_ALLOC_READ (1 << 2)
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int bch2_mark_key_locked(struct bch_fs *, struct bkey_s_c,
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bool, s64, struct bch_fs_usage *,
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u64, unsigned);
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int bch2_mark_key(struct bch_fs *, struct bkey_s_c,
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bool, s64, struct bch_fs_usage *,
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u64, unsigned);
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int bch2_fs_usage_apply(struct bch_fs *, struct bch_fs_usage_online *,
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struct disk_reservation *, unsigned);
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int bch2_mark_overwrite(struct btree_trans *, struct btree_iter *,
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struct bkey_s_c, struct bkey_i *,
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struct bch_fs_usage *, unsigned);
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int bch2_mark_update(struct btree_trans *, struct btree_insert_entry *,
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struct bch_fs_usage *, unsigned);
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void bch2_replicas_delta_list_apply(struct bch_fs *,
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struct bch_fs_usage *,
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struct replicas_delta_list *);
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int bch2_trans_mark_key(struct btree_trans *, struct bkey_s_c,
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bool, s64, struct replicas_delta_list *);
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int bch2_trans_mark_update(struct btree_trans *,
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struct btree_insert_entry *,
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struct replicas_delta_list *);
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void bch2_trans_fs_usage_apply(struct btree_trans *, struct bch_fs_usage_online *);
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/* disk reservations: */
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static inline void bch2_disk_reservation_put(struct bch_fs *c,
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struct disk_reservation *res)
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{
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this_cpu_sub(*c->online_reserved, res->sectors);
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res->sectors = 0;
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}
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#define BCH_DISK_RESERVATION_NOFAIL (1 << 0)
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int bch2_disk_reservation_add(struct bch_fs *,
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struct disk_reservation *,
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unsigned, int);
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static inline struct disk_reservation
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bch2_disk_reservation_init(struct bch_fs *c, unsigned nr_replicas)
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{
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return (struct disk_reservation) {
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.sectors = 0,
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#if 0
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/* not used yet: */
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.gen = c->capacity_gen,
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#endif
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.nr_replicas = nr_replicas,
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};
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}
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static inline int bch2_disk_reservation_get(struct bch_fs *c,
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struct disk_reservation *res,
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unsigned sectors,
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unsigned nr_replicas,
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int flags)
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{
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*res = bch2_disk_reservation_init(c, nr_replicas);
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return bch2_disk_reservation_add(c, res, sectors * nr_replicas, flags);
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}
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int bch2_dev_buckets_resize(struct bch_fs *, struct bch_dev *, u64);
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void bch2_dev_buckets_free(struct bch_dev *);
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int bch2_dev_buckets_alloc(struct bch_fs *, struct bch_dev *);
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#endif /* _BUCKETS_H */
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