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bcachefs: Account for stripe parity sectors separately

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Instead of trying to charge EC parity to the data within the stripe
(which is subject to rounding errors), let's charge it to the stripe
itself. It should also make -ENOSPC issues easier to deal with if we
charge for parity blocks up front, and means we can also make more fine
grained accounting available to the user.

Signed-off-by: Kent Overstreet <kent.overstreet@gmail.com>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet
2020-07-09 18:31:51 -04:00
committed by Kent Overstreet
parent 39283c712e
commit af4d05c46b
5 changed files with 142 additions and 86 deletions
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2
fs/bcachefs/ec.h
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@@ -3,6 +3,7 @@
#define _BCACHEFS_EC_H
#include "ec_types.h"
#include "buckets_types.h"
#include "keylist_types.h"
const char *bch2_stripe_invalid(const struct bch_fs *, struct bkey_s_c);
@@ -105,6 +106,7 @@ struct ec_stripe_new {
struct open_buckets blocks;
u8 data_block_idx[EC_STRIPE_MAX];
struct open_buckets parity;
struct disk_reservation res;
struct keylist keys;
u64 inline_keys[BKEY_U64s * 8];