+++ /dev/null
-/* 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 bkey_invalid_flags;
-
-int bch2_stripe_invalid(struct bch_fs *, struct bkey_s_c,
- enum bkey_invalid_flags, struct printbuf *);
-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, unsigned);
-
-#define bch2_bkey_ops_stripe ((struct bkey_ops) { \
- .key_invalid = bch2_stripe_invalid, \
- .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)
-{
- 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->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 target;
- unsigned algo;
- unsigned redundancy;
- enum bch_watermark watermark;
-
- 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 *);
-
-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();
- }
-}
-
-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 */
projects / bcachefs-tools-debian / blobdiff