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bcachefs: Put open_buckets in a hashtable

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This is so that the copygc code doesn't have to refer to
bucket_mark.owned_by_allocator - assisting in getting rid of the in
memory bucket array.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
This commit is contained in:
Kent Overstreet
2021-12-25 21:43:29 -05:00
committed by Kent Overstreet
parent abe19d458e
commit 9ddffaf83b
4 changed files with 58 additions and 2 deletions
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24
fs/bcachefs/alloc_foreground.h
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@ -91,6 +91,30 @@ static inline void bch2_open_bucket_get(struct bch_fs *c,
}
}
static inline open_bucket_idx_t *open_bucket_hashslot(struct bch_fs *c,
unsigned dev, u64 bucket)
{
return c->open_buckets_hash +
(jhash_3words(dev, bucket, bucket >> 32, 0) &
(OPEN_BUCKETS_COUNT - 1));
}
static inline bool bch2_bucket_is_open(struct bch_fs *c, unsigned dev, u64 bucket)
{
open_bucket_idx_t slot = *open_bucket_hashslot(c, dev, bucket);
while (slot) {
struct open_bucket *ob = &c->open_buckets[slot];
if (ob->dev == dev && ob->bucket == bucket)
return true;
slot = ob->hash;
}
return false;
}
int bch2_bucket_alloc_set(struct bch_fs *, struct open_buckets *,
struct dev_stripe_state *, struct bch_devs_mask *,
unsigned, unsigned *, bool *, enum alloc_reserve,