/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_EC_H
#define _BCACHEFS_EC_H
#include "ec_types.h"
#include "buckets_types.h"
#include "extents_types.h"
enum bch_validate_flags;
int bch2_stripe_validate(struct bch_fs *, struct bkey_s_c, enum bch_validate_flags);
void bch2_stripe_to_text(struct printbuf *, struct bch_fs *,
struct bkey_s_c);
int bch2_trigger_stripe(struct btree_trans *, enum btree_id, unsigned,
struct bkey_s_c, struct bkey_s,
enum btree_iter_update_trigger_flags);
#define bch2_bkey_ops_stripe ((struct bkey_ops) { \
.key_validate = bch2_stripe_validate, \
.val_to_text = bch2_stripe_to_text, \
.swab = bch2_ptr_swab, \
.trigger = bch2_trigger_stripe, \
.min_val_size = 8, \
})
static inline unsigned stripe_csums_per_device(const struct bch_stripe *s)
{
return DIV_ROUND_UP(le16_to_cpu(s->sectors),
1 << s->csum_granularity_bits);
}
static inline unsigned stripe_csum_offset(const struct bch_stripe *s,
unsigned dev, unsigned csum_idx)
{
EBUG_ON(s->csum_type >= BCH_CSUM_NR);
unsigned csum_bytes = bch_crc_bytes[s->csum_type];
return sizeof(struct bch_stripe) +
sizeof(struct bch_extent_ptr) * s->nr_blocks +
(dev * stripe_csums_per_device(s) + csum_idx) * csum_bytes;
}
static inline unsigned stripe_blockcount_offset(const struct bch_stripe *s,
unsigned idx)
{
return stripe_csum_offset(s, s->nr_blocks, 0) +
sizeof(u16) * idx;
}
static inline unsigned stripe_blockcount_get(const struct bch_stripe *s,
unsigned idx)
{
return le16_to_cpup((void *) s + stripe_blockcount_offset(s, idx));
}
static inline void stripe_blockcount_set(struct bch_stripe *s,
unsigned idx, unsigned v)
{
__le16 *p = (void *) s + stripe_blockcount_offset(s, idx);
*p = cpu_to_le16(v);
}
static inline unsigned stripe_val_u64s(const struct bch_stripe *s)
{
return DIV_ROUND_UP(stripe_blockcount_offset(s, s->nr_blocks),
sizeof(u64));
}
static inline void *stripe_csum(struct bch_stripe *s,
unsigned block, unsigned csum_idx)
{
EBUG_ON(block >= s->nr_blocks);
EBUG_ON(csum_idx >= stripe_csums_per_device(s));
return (void *) s + stripe_csum_offset(s, block, csum_idx);
}
static inline struct bch_csum stripe_csum_get(struct bch_stripe *s,
unsigned block, unsigned csum_idx)
{
struct bch_csum csum = { 0 };
memcpy(&csum, stripe_csum(s, block, csum_idx), bch_crc_bytes[s->csum_type]);
return csum;
}
static inline void stripe_csum_set(struct bch_stripe *s,
unsigned block, unsigned csum_idx,
struct bch_csum csum)
{
memcpy(stripe_csum(s, block, csum_idx), &csum, bch_crc_bytes[s->csum_type]);
}
static inline bool __bch2_ptr_matches_stripe(const struct bch_extent_ptr *stripe_ptr,
const struct bch_extent_ptr *data_ptr,
unsigned sectors)
{
return (data_ptr->dev == stripe_ptr->dev ||
data_ptr->dev == BCH_SB_MEMBER_INVALID ||
stripe_ptr->dev == BCH_SB_MEMBER_INVALID) &&
data_ptr->gen == stripe_ptr->gen &&
data_ptr->offset >= stripe_ptr->offset &&
data_ptr->offset < stripe_ptr->offset + sectors;
}
static inline bool bch2_ptr_matches_stripe(const struct bch_stripe *s,
struct extent_ptr_decoded p)
{
unsigned nr_data = s->nr_blocks - s->nr_redundant;
BUG_ON(!p.has_ec);
if (p.ec.block >= nr_data)
return false;
return __bch2_ptr_matches_stripe(&s->ptrs[p.ec.block], &p.ptr,
le16_to_cpu(s->sectors));
}
static inline bool bch2_ptr_matches_stripe_m(const struct gc_stripe *m,
struct extent_ptr_decoded p)
{
unsigned nr_data = m->nr_blocks - m->nr_redundant;
BUG_ON(!p.has_ec);
if (p.ec.block >= nr_data)
return false;
return __bch2_ptr_matches_stripe(&m->ptrs[p.ec.block], &p.ptr,
m->sectors);
}
struct bch_read_bio;
struct ec_stripe_buf {
/* might not be buffering the entire stripe: */
unsigned offset;
unsigned size;
unsigned long valid[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
void *data[BCH_BKEY_PTRS_MAX];
__BKEY_PADDED(key, 255);
};
struct ec_stripe_head;
enum ec_stripe_ref {
STRIPE_REF_io,
STRIPE_REF_stripe,
STRIPE_REF_NR
};
struct ec_stripe_new {
struct bch_fs *c;
struct ec_stripe_head *h;
struct mutex lock;
struct list_head list;
struct hlist_node hash;
u64 idx;
struct closure iodone;
atomic_t ref[STRIPE_REF_NR];
int err;
u8 nr_data;
u8 nr_parity;
bool allocated;
bool pending;
bool have_existing_stripe;
unsigned long blocks_gotten[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
unsigned long blocks_allocated[BITS_TO_LONGS(BCH_BKEY_PTRS_MAX)];
open_bucket_idx_t blocks[BCH_BKEY_PTRS_MAX];
struct disk_reservation res;
struct ec_stripe_buf new_stripe;
struct ec_stripe_buf existing_stripe;
};
struct ec_stripe_head {
struct list_head list;
struct mutex lock;
unsigned disk_label;
unsigned algo;
unsigned redundancy;
enum bch_watermark watermark;
bool insufficient_devs;
unsigned long rw_devs_change_count;
u64 nr_created;
struct bch_devs_mask devs;
unsigned nr_active_devs;
unsigned blocksize;
struct dev_stripe_state block_stripe;
struct dev_stripe_state parity_stripe;
struct ec_stripe_new *s;
};
int bch2_ec_read_extent(struct btree_trans *, struct bch_read_bio *, struct bkey_s_c);
void *bch2_writepoint_ec_buf(struct bch_fs *, struct write_point *);
void bch2_ec_bucket_cancel(struct bch_fs *, struct open_bucket *);
int bch2_ec_stripe_new_alloc(struct bch_fs *, struct ec_stripe_head *);
void bch2_ec_stripe_head_put(struct bch_fs *, struct ec_stripe_head *);
struct ec_stripe_head *bch2_ec_stripe_head_get(struct btree_trans *,
unsigned, unsigned, unsigned,
enum bch_watermark, struct closure *);
void bch2_stripes_heap_update(struct bch_fs *, struct stripe *, size_t);
void bch2_stripes_heap_del(struct bch_fs *, struct stripe *, size_t);
void bch2_stripes_heap_insert(struct bch_fs *, struct stripe *, size_t);
void bch2_do_stripe_deletes(struct bch_fs *);
void bch2_ec_do_stripe_creates(struct bch_fs *);
void bch2_ec_stripe_new_free(struct bch_fs *, struct ec_stripe_new *);
static inline void ec_stripe_new_get(struct ec_stripe_new *s,
enum ec_stripe_ref ref)
{
atomic_inc(&s->ref[ref]);
}
static inline void ec_stripe_new_put(struct bch_fs *c, struct ec_stripe_new *s,
enum ec_stripe_ref ref)
{
BUG_ON(atomic_read(&s->ref[ref]) <= 0);
if (atomic_dec_and_test(&s->ref[ref]))
switch (ref) {
case STRIPE_REF_stripe:
bch2_ec_stripe_new_free(c, s);
break;
case STRIPE_REF_io:
bch2_ec_do_stripe_creates(c);
break;
default:
BUG();
}
}
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 *);
int bch2_stripes_read(struct bch_fs *);
void bch2_stripes_heap_to_text(struct printbuf *, struct bch_fs *);
void bch2_new_stripes_to_text(struct printbuf *, struct bch_fs *);
void bch2_fs_ec_exit(struct bch_fs *);
void bch2_fs_ec_init_early(struct bch_fs *);
int bch2_fs_ec_init(struct bch_fs *);
#endif /* _BCACHEFS_EC_H */
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