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bcachefs: Rebalance now adds replicas if needed

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2019-09-07 12:39:59 -04:00 committed by Kent Overstreet
parent 4430ea7046
commit 5055b50939
2 changed files with 17 additions and 24 deletions
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2
fs/bcachefs/bcachefs_format.h
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@ -661,7 +661,7 @@ struct bch_reservation {
/* Maximum possible size of an entire extent value: */
#define BKEY_EXTENT_VAL_U64s_MAX \
(BKEY_EXTENT_PTR_U64s_MAX * (BCH_REPLICAS_MAX + 1))
(1 + BKEY_EXTENT_PTR_U64s_MAX * (BCH_REPLICAS_MAX + 1))
#define BKEY_PADDED(key) __BKEY_PADDED(key, BKEY_EXTENT_VAL_U64s_MAX)

39
fs/bcachefs/rebalance.c
View file

@ -42,9 +42,6 @@ void bch2_rebalance_add_key(struct bch_fs *c,
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
if (!bkey_extent_is_data(k.k))
return;
if (!io_opts->background_target &&
!io_opts->background_compression)
return;
@ -72,30 +69,26 @@ static enum data_cmd rebalance_pred(struct bch_fs *c, void *arg,
struct bch_io_opts *io_opts,
struct data_opts *data_opts)
{
switch (k.k->type) {
case KEY_TYPE_extent: {
struct bkey_s_c_extent e = bkey_s_c_to_extent(k);
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
unsigned nr_replicas = 0;
/* Make sure we have room to add a new pointer: */
if (bkey_val_u64s(e.k) + BKEY_EXTENT_PTR_U64s_MAX >
BKEY_EXTENT_VAL_U64s_MAX)
return DATA_SKIP;
bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
nr_replicas += !p.ptr.cached;
extent_for_each_ptr_decode(e, p, entry)
if (rebalance_ptr_pred(c, p, io_opts))
goto found;
if (rebalance_ptr_pred(c, p, io_opts))
goto found;
}
return DATA_SKIP;
if (nr_replicas < io_opts->data_replicas)
goto found;
return DATA_SKIP;
found:
data_opts->target = io_opts->background_target;
data_opts->btree_insert_flags = 0;
return DATA_ADD_REPLICAS;
}
default:
return DATA_SKIP;
}
data_opts->target = io_opts->background_target;
data_opts->btree_insert_flags = 0;
return DATA_ADD_REPLICAS;
}
struct rebalance_work {