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bcachefs: BCH_DATA_OP_drop_extra_replicas

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Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-11-20 19:12:40 -05:00
parent 3c843a6759
commit ba11c7d67a
2 changed files with 46 additions and 7 deletions
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3
fs/bcachefs/bcachefs_ioctl.h
View File

@ -177,7 +177,8 @@ struct bch_ioctl_disk_set_state {
x(scrub, 0) \
x(rereplicate, 1) \
x(migrate, 2) \
x(rewrite_old_nodes, 3)
x(rewrite_old_nodes, 3) \
x(drop_extra_replicas, 4)
enum bch_data_ops {
#define x(t, n) BCH_DATA_OP_##t = n,

50
fs/bcachefs/move.c
View File

@ -1013,6 +1013,41 @@ int bch2_scan_old_btree_nodes(struct bch_fs *c, struct bch_move_stats *stats)
return ret;
}
static bool drop_extra_replicas_pred(struct bch_fs *c, void *arg,
struct bkey_s_c k,
struct bch_io_opts *io_opts,
struct data_update_opts *data_opts)
{
unsigned durability = bch2_bkey_durability(c, k);
unsigned replicas = bkey_is_btree_ptr(k.k)
? c->opts.metadata_replicas
: io_opts->data_replicas;
const union bch_extent_entry *entry;
struct extent_ptr_decoded p;
unsigned i = 0;
bkey_for_each_ptr_decode(k.k, bch2_bkey_ptrs_c(k), p, entry) {
unsigned d = bch2_extent_ptr_durability(c, &p);
if (d && durability - d >= replicas) {
data_opts->kill_ptrs |= BIT(i);
durability -= d;
}
i++;
}
return data_opts->kill_ptrs != 0;
}
static bool drop_extra_replicas_btree_pred(struct bch_fs *c, void *arg,
struct btree *b,
struct bch_io_opts *io_opts,
struct data_update_opts *data_opts)
{
return drop_extra_replicas_pred(c, arg, bkey_i_to_s_c(&b->key), io_opts, data_opts);
}
int bch2_data_job(struct bch_fs *c,
struct bch_move_stats *stats,
struct bch_ioctl_data op)
@ -1030,11 +1065,8 @@ int bch2_data_job(struct bch_fs *c,
case BCH_DATA_OP_rereplicate:
stats->data_type = BCH_DATA_journal;
ret = bch2_journal_flush_device_pins(&c->journal, -1);
ret = bch2_move_btree(c, start, end,
rereplicate_btree_pred, c, stats) ?: ret;
ret = bch2_replicas_gc2(c) ?: ret;
ret = bch2_move_data(c, start, end,
NULL,
stats,
@ -1049,11 +1081,8 @@ int bch2_data_job(struct bch_fs *c,
stats->data_type = BCH_DATA_journal;
ret = bch2_journal_flush_device_pins(&c->journal, op.migrate.dev);
ret = bch2_move_btree(c, start, end,
migrate_btree_pred, &op, stats) ?: ret;
ret = bch2_replicas_gc2(c) ?: ret;
ret = bch2_move_data(c, start, end,
NULL,
stats,
@ -1065,6 +1094,15 @@ int bch2_data_job(struct bch_fs *c,
case BCH_DATA_OP_rewrite_old_nodes:
ret = bch2_scan_old_btree_nodes(c, stats);
break;
case BCH_DATA_OP_drop_extra_replicas:
ret = bch2_move_btree(c, start, end,
drop_extra_replicas_btree_pred, c, stats) ?: ret;
ret = bch2_move_data(c, start, end, NULL, stats,
writepoint_hashed((unsigned long) current),
true,
drop_extra_replicas_pred, c) ?: ret;
ret = bch2_replicas_gc2(c) ?: ret;
break;
default:
ret = -EINVAL;
}