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bcachefs: bch2_dev_remove_stripes()

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We can now correctly force-remove a device that has stripes on it; this
uses the new BCH_SB_MEMBER_INVALID sentinal value.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-09-01 18:35:52 -04:00
parent 934137b0c0
commit ad8d1f77fc
4 changed files with 74 additions and 3 deletions
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7
fs/bcachefs/alloc_background.c
View file

@ -2310,7 +2310,8 @@ int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca)
* We clear the LRU and need_discard btrees first so that we don't race
* with bch2_do_invalidates() and bch2_do_discards()
*/
ret = bch2_btree_delete_range(c, BTREE_ID_lru, start, end,
ret = bch2_dev_remove_stripes(c, ca->dev_idx) ?:
bch2_btree_delete_range(c, BTREE_ID_lru, start, end,
BTREE_TRIGGER_norun, NULL) ?:
bch2_btree_delete_range(c, BTREE_ID_need_discard, start, end,
BTREE_TRIGGER_norun, NULL) ?:
@ -2318,10 +2319,10 @@ int bch2_dev_remove_alloc(struct bch_fs *c, struct bch_dev *ca)
BTREE_TRIGGER_norun, NULL) ?:
bch2_btree_delete_range(c, BTREE_ID_backpointers, start, end,
BTREE_TRIGGER_norun, NULL) ?:
bch2_btree_delete_range(c, BTREE_ID_alloc, start, end,
BTREE_TRIGGER_norun, NULL) ?:
bch2_btree_delete_range(c, BTREE_ID_bucket_gens, start, end,
BTREE_TRIGGER_norun, NULL) ?:
bch2_btree_delete_range(c, BTREE_ID_alloc, start, end,
BTREE_TRIGGER_norun, NULL) ?:
bch2_dev_usage_remove(c, ca->dev_idx);
bch_err_msg(ca, ret, "removing dev alloc info");
return ret;

67
fs/bcachefs/ec.c
View file

@ -2169,6 +2169,73 @@ struct ec_stripe_head *bch2_ec_stripe_head_get(struct btree_trans *trans,
return ERR_PTR(ret);
}
/* device removal */
static int bch2_invalidate_stripe_to_dev(struct btree_trans *trans, struct bkey_s_c k_a)
{
struct bch_alloc_v4 a_convert;
const struct bch_alloc_v4 *a = bch2_alloc_to_v4(k_a, &a_convert);
if (!a->stripe)
return 0;
if (a->stripe_sectors) {
bch_err(trans->c, "trying to invalidate device in stripe when bucket has stripe data");
return -BCH_ERR_invalidate_stripe_to_dev;
}
struct btree_iter iter;
struct bkey_i_stripe *s =
bch2_bkey_get_mut_typed(trans, &iter, BTREE_ID_stripes, POS(0, a->stripe),
BTREE_ITER_slots, stripe);
int ret = PTR_ERR_OR_ZERO(s);
if (ret)
return ret;
struct disk_accounting_pos acc = {
.type = BCH_DISK_ACCOUNTING_replicas,
};
s64 sectors = 0;
for (unsigned i = 0; i < s->v.nr_blocks; i++)
sectors -= stripe_blockcount_get(&s->v, i);
bch2_bkey_to_replicas(&acc.replicas, bkey_i_to_s_c(&s->k_i));
acc.replicas.data_type = BCH_DATA_user;
ret = bch2_disk_accounting_mod(trans, &acc, &sectors, 1, false);
if (ret)
goto err;
struct bkey_ptrs ptrs = bch2_bkey_ptrs(bkey_i_to_s(&s->k_i));
bkey_for_each_ptr(ptrs, ptr)
if (ptr->dev == k_a.k->p.inode)
ptr->dev = BCH_SB_MEMBER_INVALID;
sectors = -sectors;
bch2_bkey_to_replicas(&acc.replicas, bkey_i_to_s_c(&s->k_i));
acc.replicas.data_type = BCH_DATA_user;
ret = bch2_disk_accounting_mod(trans, &acc, &sectors, 1, false);
if (ret)
goto err;
err:
bch2_trans_iter_exit(trans, &iter);
return ret;
}
int bch2_dev_remove_stripes(struct bch_fs *c, unsigned dev_idx)
{
return bch2_trans_run(c,
for_each_btree_key_upto_commit(trans, iter,
BTREE_ID_alloc, POS(dev_idx, 0), POS(dev_idx, U64_MAX),
BTREE_ITER_intent, k,
NULL, NULL, 0, ({
bch2_invalidate_stripe_to_dev(trans, k);
})));
}
/* startup/shutdown */
static void __bch2_ec_stop(struct bch_fs *c, struct bch_dev *ca)
{
struct ec_stripe_head *h;

2
fs/bcachefs/ec.h
View file

@ -251,6 +251,8 @@ static inline void ec_stripe_new_put(struct bch_fs *c, struct ec_stripe_new *s,
}
}
int bch2_dev_remove_stripes(struct bch_fs *, unsigned);
void bch2_ec_stop_dev(struct bch_fs *, struct bch_dev *);
void bch2_fs_ec_stop(struct bch_fs *);
void bch2_fs_ec_flush(struct bch_fs *);

1
fs/bcachefs/errcode.h
View file

@ -253,6 +253,7 @@
x(EIO, key_type_error) \
x(EIO, no_device_to_read_from) \
x(EIO, missing_indirect_extent) \
x(EIO, invalidate_stripe_to_dev) \
x(BCH_ERR_btree_node_read_err, btree_node_read_err_fixable) \
x(BCH_ERR_btree_node_read_err, btree_node_read_err_want_retry) \
x(BCH_ERR_btree_node_read_err, btree_node_read_err_must_retry) \