552 lines
15 KiB
C
552 lines
15 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_EXTENTS_H
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#define _BCACHEFS_EXTENTS_H
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#include "bcachefs.h"
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#include "bkey.h"
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#include "extents_types.h"
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struct bch_fs;
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struct journal_res;
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struct btree_node_iter;
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struct btree_node_iter_large;
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struct btree_insert;
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struct btree_insert_entry;
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struct bch_devs_mask;
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union bch_extent_crc;
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const char *bch2_btree_ptr_invalid(const struct bch_fs *, struct bkey_s_c);
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void bch2_btree_ptr_debugcheck(struct bch_fs *, struct btree *,
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struct bkey_s_c);
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int bch2_btree_ptr_to_text(struct bch_fs *, char *, size_t, struct bkey_s_c);
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void bch2_ptr_swab(const struct bkey_format *, struct bkey_packed *);
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#define bch2_bkey_btree_ops (struct bkey_ops) { \
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.key_invalid = bch2_btree_ptr_invalid, \
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.key_debugcheck = bch2_btree_ptr_debugcheck, \
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.val_to_text = bch2_btree_ptr_to_text, \
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.swab = bch2_ptr_swab, \
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}
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const char *bch2_extent_invalid(const struct bch_fs *, struct bkey_s_c);
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void bch2_extent_debugcheck(struct bch_fs *, struct btree *, struct bkey_s_c);
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int bch2_extent_to_text(struct bch_fs *, char *, size_t, struct bkey_s_c);
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bool bch2_ptr_normalize(struct bch_fs *, struct btree *, struct bkey_s);
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enum merge_result bch2_extent_merge(struct bch_fs *, struct btree *,
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struct bkey_i *, struct bkey_i *);
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#define bch2_bkey_extent_ops (struct bkey_ops) { \
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.key_invalid = bch2_extent_invalid, \
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.key_debugcheck = bch2_extent_debugcheck, \
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.val_to_text = bch2_extent_to_text, \
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.swab = bch2_ptr_swab, \
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.key_normalize = bch2_ptr_normalize, \
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.key_merge = bch2_extent_merge, \
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.is_extents = true, \
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}
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struct btree_nr_keys bch2_key_sort_fix_overlapping(struct bset *,
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struct btree *,
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struct btree_node_iter_large *);
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struct btree_nr_keys bch2_extent_sort_fix_overlapping(struct bch_fs *c,
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struct bset *,
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struct btree *,
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struct btree_node_iter_large *);
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int bch2_btree_pick_ptr(struct bch_fs *, const struct btree *,
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struct bch_devs_mask *avoid,
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struct extent_pick_ptr *);
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int bch2_extent_pick_ptr(struct bch_fs *, struct bkey_s_c,
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struct bch_devs_mask *,
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struct extent_pick_ptr *);
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void bch2_extent_trim_atomic(struct bkey_i *, struct btree_iter *);
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static inline bool bch2_extent_is_atomic(struct bkey *k,
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struct btree_iter *iter)
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{
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struct btree *b = iter->l[0].b;
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return bkey_cmp(k->p, b->key.k.p) <= 0 &&
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bkey_cmp(bkey_start_pos(k), b->data->min_key) >= 0;
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}
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enum btree_insert_ret
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bch2_extent_can_insert(struct btree_insert *, struct btree_insert_entry *,
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unsigned *);
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enum btree_insert_ret
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bch2_insert_fixup_extent(struct btree_insert *, struct btree_insert_entry *);
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bool bch2_extent_normalize(struct bch_fs *, struct bkey_s);
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void bch2_extent_mark_replicas_cached(struct bch_fs *, struct bkey_s_extent,
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unsigned, unsigned);
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const struct bch_extent_ptr *
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bch2_extent_has_device(struct bkey_s_c_extent, unsigned);
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bool bch2_extent_drop_device(struct bkey_s_extent, unsigned);
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const struct bch_extent_ptr *
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bch2_extent_has_group(struct bch_fs *, struct bkey_s_c_extent, unsigned);
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const struct bch_extent_ptr *
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bch2_extent_has_target(struct bch_fs *, struct bkey_s_c_extent, unsigned);
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unsigned bch2_extent_nr_ptrs(struct bkey_s_c_extent);
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unsigned bch2_extent_nr_dirty_ptrs(struct bkey_s_c);
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unsigned bch2_extent_is_compressed(struct bkey_s_c);
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unsigned bch2_extent_ptr_durability(struct bch_fs *,
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const struct bch_extent_ptr *);
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unsigned bch2_extent_durability(struct bch_fs *, struct bkey_s_c_extent);
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bool bch2_extent_matches_ptr(struct bch_fs *, struct bkey_s_c_extent,
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struct bch_extent_ptr, u64);
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static inline bool bkey_extent_is_data(const struct bkey *k)
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{
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switch (k->type) {
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case BCH_EXTENT:
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case BCH_EXTENT_CACHED:
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return true;
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default:
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return false;
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}
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}
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static inline bool bkey_extent_is_allocation(const struct bkey *k)
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{
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switch (k->type) {
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case BCH_EXTENT:
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case BCH_EXTENT_CACHED:
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case BCH_RESERVATION:
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return true;
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default:
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return false;
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}
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}
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static inline bool bch2_extent_is_fully_allocated(struct bkey_s_c k)
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{
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return bkey_extent_is_allocation(k.k) &&
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!bch2_extent_is_compressed(k);
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}
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static inline bool bkey_extent_is_cached(const struct bkey *k)
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{
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return k->type == BCH_EXTENT_CACHED;
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}
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static inline void bkey_extent_set_cached(struct bkey *k, bool cached)
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{
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EBUG_ON(k->type != BCH_EXTENT &&
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k->type != BCH_EXTENT_CACHED);
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k->type = cached ? BCH_EXTENT_CACHED : BCH_EXTENT;
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}
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static inline unsigned
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__extent_entry_type(const union bch_extent_entry *e)
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{
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return e->type ? __ffs(e->type) : BCH_EXTENT_ENTRY_MAX;
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}
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static inline enum bch_extent_entry_type
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extent_entry_type(const union bch_extent_entry *e)
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{
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int ret = __ffs(e->type);
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EBUG_ON(ret < 0 || ret >= BCH_EXTENT_ENTRY_MAX);
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return ret;
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}
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static inline size_t extent_entry_bytes(const union bch_extent_entry *entry)
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{
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switch (extent_entry_type(entry)) {
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case BCH_EXTENT_ENTRY_crc32:
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return sizeof(struct bch_extent_crc32);
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case BCH_EXTENT_ENTRY_crc64:
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return sizeof(struct bch_extent_crc64);
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case BCH_EXTENT_ENTRY_crc128:
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return sizeof(struct bch_extent_crc128);
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case BCH_EXTENT_ENTRY_ptr:
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return sizeof(struct bch_extent_ptr);
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default:
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BUG();
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}
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}
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static inline size_t extent_entry_u64s(const union bch_extent_entry *entry)
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{
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return extent_entry_bytes(entry) / sizeof(u64);
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}
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static inline bool extent_entry_is_ptr(const union bch_extent_entry *e)
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{
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return extent_entry_type(e) == BCH_EXTENT_ENTRY_ptr;
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}
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static inline bool extent_entry_is_crc(const union bch_extent_entry *e)
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{
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return !extent_entry_is_ptr(e);
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}
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union bch_extent_crc {
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u8 type;
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struct bch_extent_crc32 crc32;
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struct bch_extent_crc64 crc64;
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struct bch_extent_crc128 crc128;
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};
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/* downcast, preserves const */
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#define to_entry(_entry) \
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({ \
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BUILD_BUG_ON(!type_is(_entry, union bch_extent_crc *) && \
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!type_is(_entry, struct bch_extent_ptr *)); \
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\
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__builtin_choose_expr( \
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(type_is_exact(_entry, const union bch_extent_crc *) || \
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type_is_exact(_entry, const struct bch_extent_ptr *)), \
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(const union bch_extent_entry *) (_entry), \
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(union bch_extent_entry *) (_entry)); \
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})
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#define __entry_to_crc(_entry) \
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__builtin_choose_expr( \
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type_is_exact(_entry, const union bch_extent_entry *), \
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(const union bch_extent_crc *) (_entry), \
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(union bch_extent_crc *) (_entry))
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#define entry_to_crc(_entry) \
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({ \
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EBUG_ON((_entry) && !extent_entry_is_crc(_entry)); \
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\
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__entry_to_crc(_entry); \
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})
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#define entry_to_ptr(_entry) \
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({ \
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EBUG_ON((_entry) && !extent_entry_is_ptr(_entry)); \
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\
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__builtin_choose_expr( \
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type_is_exact(_entry, const union bch_extent_entry *), \
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(const struct bch_extent_ptr *) (_entry), \
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(struct bch_extent_ptr *) (_entry)); \
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})
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/* checksum entries: */
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enum bch_extent_crc_type {
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BCH_EXTENT_CRC_NONE,
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BCH_EXTENT_CRC32,
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BCH_EXTENT_CRC64,
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BCH_EXTENT_CRC128,
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};
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static inline enum bch_extent_crc_type
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__extent_crc_type(const union bch_extent_crc *crc)
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{
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if (!crc)
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return BCH_EXTENT_CRC_NONE;
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switch (extent_entry_type(to_entry(crc))) {
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case BCH_EXTENT_ENTRY_crc32:
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return BCH_EXTENT_CRC32;
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case BCH_EXTENT_ENTRY_crc64:
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return BCH_EXTENT_CRC64;
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case BCH_EXTENT_ENTRY_crc128:
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return BCH_EXTENT_CRC128;
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default:
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BUG();
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}
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}
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#define extent_crc_type(_crc) \
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({ \
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BUILD_BUG_ON(!type_is(_crc, struct bch_extent_crc32 *) && \
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!type_is(_crc, struct bch_extent_crc64 *) && \
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!type_is(_crc, struct bch_extent_crc128 *) && \
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!type_is(_crc, union bch_extent_crc *)); \
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\
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type_is(_crc, struct bch_extent_crc32 *) ? BCH_EXTENT_CRC32 \
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: type_is(_crc, struct bch_extent_crc64 *) ? BCH_EXTENT_CRC64 \
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: type_is(_crc, struct bch_extent_crc128 *) ? BCH_EXTENT_CRC128 \
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: __extent_crc_type((union bch_extent_crc *) _crc); \
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})
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static inline struct bch_extent_crc_unpacked
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bch2_extent_crc_unpack(const struct bkey *k, const union bch_extent_crc *crc)
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{
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#define common_fields(_crc) \
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.csum_type = _crc.csum_type, \
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.compression_type = _crc.compression_type, \
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.compressed_size = _crc._compressed_size + 1, \
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.uncompressed_size = _crc._uncompressed_size + 1, \
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.offset = _crc.offset, \
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.live_size = k->size
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switch (extent_crc_type(crc)) {
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case BCH_EXTENT_CRC_NONE:
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return (struct bch_extent_crc_unpacked) {
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.compressed_size = k->size,
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.uncompressed_size = k->size,
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.live_size = k->size,
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};
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case BCH_EXTENT_CRC32: {
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struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
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common_fields(crc->crc32),
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};
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*((__le32 *) &ret.csum.lo) = crc->crc32.csum;
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memcpy(&ret.csum.lo, &crc->crc32.csum,
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sizeof(crc->crc32.csum));
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return ret;
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}
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case BCH_EXTENT_CRC64: {
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struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
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common_fields(crc->crc64),
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.nonce = crc->crc64.nonce,
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.csum.lo = (__force __le64) crc->crc64.csum_lo,
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};
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*((__le16 *) &ret.csum.hi) = crc->crc64.csum_hi;
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return ret;
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}
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case BCH_EXTENT_CRC128: {
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struct bch_extent_crc_unpacked ret = (struct bch_extent_crc_unpacked) {
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common_fields(crc->crc128),
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.nonce = crc->crc128.nonce,
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.csum = crc->crc128.csum,
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};
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return ret;
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}
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default:
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BUG();
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}
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#undef common_fields
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}
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/* Extent entry iteration: */
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#define extent_entry_next(_entry) \
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((typeof(_entry)) ((void *) (_entry) + extent_entry_bytes(_entry)))
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#define extent_entry_last(_e) \
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vstruct_idx((_e).v, bkey_val_u64s((_e).k))
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/* Iterate over all entries: */
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#define extent_for_each_entry_from(_e, _entry, _start) \
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for ((_entry) = _start; \
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(_entry) < extent_entry_last(_e); \
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(_entry) = extent_entry_next(_entry))
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#define extent_for_each_entry(_e, _entry) \
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extent_for_each_entry_from(_e, _entry, (_e).v->start)
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/* Iterate over crcs only: */
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#define __extent_crc_next(_e, _p) \
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({ \
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typeof(&(_e).v->start[0]) _entry = _p; \
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\
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while ((_entry) < extent_entry_last(_e) && \
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!extent_entry_is_crc(_entry)) \
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(_entry) = extent_entry_next(_entry); \
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\
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entry_to_crc(_entry < extent_entry_last(_e) ? _entry : NULL); \
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})
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#define __extent_for_each_crc(_e, _crc) \
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for ((_crc) = __extent_crc_next(_e, (_e).v->start); \
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(_crc); \
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(_crc) = __extent_crc_next(_e, extent_entry_next(to_entry(_crc))))
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#define extent_crc_next(_e, _crc, _iter) \
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({ \
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extent_for_each_entry_from(_e, _iter, _iter) \
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if (extent_entry_is_crc(_iter)) { \
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(_crc) = bch2_extent_crc_unpack((_e).k, entry_to_crc(_iter));\
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break; \
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} \
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\
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(_iter) < extent_entry_last(_e); \
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})
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#define extent_for_each_crc(_e, _crc, _iter) \
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for ((_crc) = bch2_extent_crc_unpack((_e).k, NULL), \
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(_iter) = (_e).v->start; \
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extent_crc_next(_e, _crc, _iter); \
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(_iter) = extent_entry_next(_iter))
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/* Iterate over pointers, with crcs: */
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#define extent_ptr_crc_next(_e, _ptr, _crc) \
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({ \
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__label__ out; \
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typeof(&(_e).v->start[0]) _entry; \
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\
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extent_for_each_entry_from(_e, _entry, to_entry(_ptr)) \
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if (extent_entry_is_crc(_entry)) { \
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(_crc) = bch2_extent_crc_unpack((_e).k, entry_to_crc(_entry));\
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} else { \
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_ptr = entry_to_ptr(_entry); \
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goto out; \
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} \
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\
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_ptr = NULL; \
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out: \
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_ptr; \
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})
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#define extent_for_each_ptr_crc(_e, _ptr, _crc) \
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for ((_crc) = bch2_extent_crc_unpack((_e).k, NULL), \
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(_ptr) = &(_e).v->start->ptr; \
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((_ptr) = extent_ptr_crc_next(_e, _ptr, _crc)); \
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(_ptr)++)
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/* Iterate over pointers only, and from a given position: */
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#define extent_ptr_next(_e, _ptr) \
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({ \
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struct bch_extent_crc_unpacked _crc; \
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\
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extent_ptr_crc_next(_e, _ptr, _crc); \
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})
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#define extent_for_each_ptr(_e, _ptr) \
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for ((_ptr) = &(_e).v->start->ptr; \
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((_ptr) = extent_ptr_next(_e, _ptr)); \
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(_ptr)++)
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#define extent_ptr_prev(_e, _ptr) \
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({ \
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typeof(&(_e).v->start->ptr) _p; \
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typeof(&(_e).v->start->ptr) _prev = NULL; \
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\
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extent_for_each_ptr(_e, _p) { \
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if (_p == (_ptr)) \
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break; \
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_prev = _p; \
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} \
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\
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_prev; \
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})
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/*
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* Use this when you'll be dropping pointers as you iterate. Quadratic,
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* unfortunately:
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*/
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#define extent_for_each_ptr_backwards(_e, _ptr) \
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for ((_ptr) = extent_ptr_prev(_e, NULL); \
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(_ptr); \
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(_ptr) = extent_ptr_prev(_e, _ptr))
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void bch2_extent_crc_append(struct bkey_i_extent *,
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struct bch_extent_crc_unpacked);
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static inline void __extent_entry_push(struct bkey_i_extent *e)
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{
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union bch_extent_entry *entry = extent_entry_last(extent_i_to_s(e));
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EBUG_ON(bkey_val_u64s(&e->k) + extent_entry_u64s(entry) >
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BKEY_EXTENT_VAL_U64s_MAX);
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e->k.u64s += extent_entry_u64s(entry);
|
|
}
|
|
|
|
static inline void extent_ptr_append(struct bkey_i_extent *e,
|
|
struct bch_extent_ptr ptr)
|
|
{
|
|
ptr.type = 1 << BCH_EXTENT_ENTRY_ptr;
|
|
extent_entry_last(extent_i_to_s(e))->ptr = ptr;
|
|
__extent_entry_push(e);
|
|
}
|
|
|
|
static inline struct bch_devs_list bch2_extent_devs(struct bkey_s_c_extent e)
|
|
{
|
|
struct bch_devs_list ret = (struct bch_devs_list) { 0 };
|
|
const struct bch_extent_ptr *ptr;
|
|
|
|
extent_for_each_ptr(e, ptr)
|
|
ret.devs[ret.nr++] = ptr->dev;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline struct bch_devs_list bch2_extent_dirty_devs(struct bkey_s_c_extent e)
|
|
{
|
|
struct bch_devs_list ret = (struct bch_devs_list) { 0 };
|
|
const struct bch_extent_ptr *ptr;
|
|
|
|
extent_for_each_ptr(e, ptr)
|
|
if (!ptr->cached)
|
|
ret.devs[ret.nr++] = ptr->dev;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline struct bch_devs_list bch2_extent_cached_devs(struct bkey_s_c_extent e)
|
|
{
|
|
struct bch_devs_list ret = (struct bch_devs_list) { 0 };
|
|
const struct bch_extent_ptr *ptr;
|
|
|
|
extent_for_each_ptr(e, ptr)
|
|
if (ptr->cached)
|
|
ret.devs[ret.nr++] = ptr->dev;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline struct bch_devs_list bch2_bkey_devs(struct bkey_s_c k)
|
|
{
|
|
switch (k.k->type) {
|
|
case BCH_EXTENT:
|
|
case BCH_EXTENT_CACHED:
|
|
return bch2_extent_devs(bkey_s_c_to_extent(k));
|
|
default:
|
|
return (struct bch_devs_list) { .nr = 0 };
|
|
}
|
|
}
|
|
|
|
static inline struct bch_devs_list bch2_bkey_dirty_devs(struct bkey_s_c k)
|
|
{
|
|
switch (k.k->type) {
|
|
case BCH_EXTENT:
|
|
case BCH_EXTENT_CACHED:
|
|
return bch2_extent_dirty_devs(bkey_s_c_to_extent(k));
|
|
default:
|
|
return (struct bch_devs_list) { .nr = 0 };
|
|
}
|
|
}
|
|
|
|
static inline struct bch_devs_list bch2_bkey_cached_devs(struct bkey_s_c k)
|
|
{
|
|
switch (k.k->type) {
|
|
case BCH_EXTENT:
|
|
case BCH_EXTENT_CACHED:
|
|
return bch2_extent_cached_devs(bkey_s_c_to_extent(k));
|
|
default:
|
|
return (struct bch_devs_list) { .nr = 0 };
|
|
}
|
|
}
|
|
|
|
bool bch2_can_narrow_extent_crcs(struct bkey_s_c_extent,
|
|
struct bch_extent_crc_unpacked);
|
|
bool bch2_extent_narrow_crcs(struct bkey_i_extent *, struct bch_extent_crc_unpacked);
|
|
void bch2_extent_drop_redundant_crcs(struct bkey_s_extent);
|
|
|
|
void __bch2_extent_drop_ptr(struct bkey_s_extent, struct bch_extent_ptr *);
|
|
void bch2_extent_drop_ptr(struct bkey_s_extent, struct bch_extent_ptr *);
|
|
|
|
bool bch2_cut_front(struct bpos, struct bkey_i *);
|
|
bool bch2_cut_back(struct bpos, struct bkey *);
|
|
void bch2_key_resize(struct bkey *, unsigned);
|
|
|
|
int bch2_check_range_allocated(struct bch_fs *, struct bpos, u64);
|
|
|
|
#endif /* _BCACHEFS_EXTENTS_H */
|