mirror of
https://github.com/koverstreet/bcachefs-tools.git
synced 2025-02-02 00:00:03 +03:00
588 lines
15 KiB
C
588 lines
15 KiB
C
#ifndef _BCACHE_EXTENTS_H
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#define _BCACHE_EXTENTS_H
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#include "bcache.h"
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#include "bkey.h"
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#include <linux/bcache.h>
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struct btree_node_iter;
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struct btree_insert;
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struct btree_insert_entry;
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struct extent_insert_hook;
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struct btree_nr_keys bch_key_sort_fix_overlapping(struct bset *,
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struct btree *,
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struct btree_node_iter *);
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struct btree_nr_keys bch_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 *);
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extern const struct bkey_ops bch_bkey_btree_ops;
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extern const struct bkey_ops bch_bkey_extent_ops;
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struct bch_fs;
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struct journal_res;
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struct extent_pick_ptr {
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struct bch_extent_crc128 crc;
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struct bch_extent_ptr ptr;
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struct bch_dev *ca;
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};
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struct extent_pick_ptr
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bch_btree_pick_ptr(struct bch_fs *, const struct btree *);
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void bch_extent_pick_ptr_avoiding(struct bch_fs *, struct bkey_s_c,
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struct bch_dev *, struct extent_pick_ptr *);
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static inline void
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bch_extent_pick_ptr(struct bch_fs *c, struct bkey_s_c k,
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struct extent_pick_ptr *ret)
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{
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bch_extent_pick_ptr_avoiding(c, k, NULL, ret);
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}
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enum extent_insert_hook_ret
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bch_extent_cmpxchg(struct extent_insert_hook *, struct bpos, struct bpos,
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struct bkey_s_c, const struct bkey_i *);
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enum btree_insert_ret
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bch_insert_fixup_extent(struct btree_insert *,
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struct btree_insert_entry *);
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bool bch_extent_normalize(struct bch_fs *, struct bkey_s);
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void bch_extent_mark_replicas_cached(struct bch_fs *,
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struct bkey_s_extent, unsigned);
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unsigned bch_extent_nr_ptrs(struct bkey_s_c_extent);
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unsigned bch_extent_nr_dirty_ptrs(struct bkey_s_c);
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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 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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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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#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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/* Iterate over pointers, with crcs: */
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#define extent_ptr_crc_next_filter(_e, _crc, _ptr, _filter) \
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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) = entry_to_crc(_entry); \
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} else { \
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_ptr = entry_to_ptr(_entry); \
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if (_filter) \
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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_filter(_e, _ptr, _crc, _filter) \
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for ((_crc) = NULL, \
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(_ptr) = &(_e).v->start->ptr; \
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((_ptr) = extent_ptr_crc_next_filter(_e, _crc, _ptr, _filter));\
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(_ptr)++)
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#define extent_for_each_ptr_crc(_e, _ptr, _crc) \
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extent_for_each_ptr_crc_filter(_e, _ptr, _crc, true)
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/* Iterate over pointers only, and from a given position: */
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#define extent_ptr_next_filter(_e, _ptr, _filter) \
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({ \
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typeof(__entry_to_crc(&(_e).v->start[0])) _crc; \
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\
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extent_ptr_crc_next_filter(_e, _crc, _ptr, _filter); \
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})
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#define extent_ptr_next(_e, _ptr) \
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extent_ptr_next_filter(_e, _ptr, true)
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#define extent_for_each_ptr_filter(_e, _ptr, _filter) \
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for ((_ptr) = &(_e).v->start->ptr; \
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((_ptr) = extent_ptr_next_filter(_e, _ptr, _filter)); \
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(_ptr)++)
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#define extent_for_each_ptr(_e, _ptr) \
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extent_for_each_ptr_filter(_e, _ptr, true)
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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 bch_extent_crc_append(struct bkey_i_extent *, unsigned, unsigned,
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unsigned, unsigned, struct bch_csum, unsigned);
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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);
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}
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static inline void extent_ptr_append(struct bkey_i_extent *e,
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struct bch_extent_ptr ptr)
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{
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ptr.type = 1 << BCH_EXTENT_ENTRY_ptr;
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extent_entry_last(extent_i_to_s(e))->ptr = ptr;
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__extent_entry_push(e);
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}
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static inline struct bch_extent_crc128 crc_to_128(const struct bkey *k,
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const union bch_extent_crc *crc)
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{
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EBUG_ON(!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_crc128) {
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._compressed_size = k->size - 1,
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._uncompressed_size = k->size - 1,
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};
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case BCH_EXTENT_CRC32:
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return (struct bch_extent_crc128) {
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.type = 1 << BCH_EXTENT_ENTRY_crc128,
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._compressed_size = crc->crc32._compressed_size,
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._uncompressed_size = crc->crc32._uncompressed_size,
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.offset = crc->crc32.offset,
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.csum_type = crc->crc32.csum_type,
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.compression_type = crc->crc32.compression_type,
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.csum.lo = crc->crc32.csum,
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};
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case BCH_EXTENT_CRC64:
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return (struct bch_extent_crc128) {
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.type = 1 << BCH_EXTENT_ENTRY_crc128,
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._compressed_size = crc->crc64._compressed_size,
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._uncompressed_size = crc->crc64._uncompressed_size,
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.offset = crc->crc64.offset,
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.nonce = crc->crc64.nonce,
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.csum_type = crc->crc64.csum_type,
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.compression_type = crc->crc64.compression_type,
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.csum.lo = crc->crc64.csum_lo,
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.csum.hi = crc->crc64.csum_hi,
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};
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case BCH_EXTENT_CRC128:
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return crc->crc128;
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default:
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BUG();
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}
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}
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#define crc_compressed_size(_k, _crc) \
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({ \
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unsigned _size = 0; \
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\
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switch (extent_crc_type(_crc)) { \
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case BCH_EXTENT_CRC_NONE: \
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_size = ((const struct bkey *) (_k))->size; \
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break; \
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case BCH_EXTENT_CRC32: \
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_size = ((struct bch_extent_crc32 *) _crc) \
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->_compressed_size + 1; \
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break; \
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case BCH_EXTENT_CRC64: \
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_size = ((struct bch_extent_crc64 *) _crc) \
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->_compressed_size + 1; \
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break; \
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case BCH_EXTENT_CRC128: \
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_size = ((struct bch_extent_crc128 *) _crc) \
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->_compressed_size + 1; \
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break; \
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} \
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_size; \
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})
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#define crc_uncompressed_size(_k, _crc) \
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({ \
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unsigned _size = 0; \
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\
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switch (extent_crc_type(_crc)) { \
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case BCH_EXTENT_CRC_NONE: \
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_size = ((const struct bkey *) (_k))->size; \
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break; \
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case BCH_EXTENT_CRC32: \
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_size = ((struct bch_extent_crc32 *) _crc) \
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->_uncompressed_size + 1; \
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break; \
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case BCH_EXTENT_CRC64: \
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_size = ((struct bch_extent_crc64 *) _crc) \
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->_uncompressed_size + 1; \
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break; \
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case BCH_EXTENT_CRC128: \
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_size = ((struct bch_extent_crc128 *) _crc) \
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->_uncompressed_size + 1; \
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break; \
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} \
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_size; \
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})
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static inline unsigned crc_offset(const union bch_extent_crc *crc)
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{
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switch (extent_crc_type(crc)) {
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case BCH_EXTENT_CRC_NONE:
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return 0;
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case BCH_EXTENT_CRC32:
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return crc->crc32.offset;
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case BCH_EXTENT_CRC64:
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return crc->crc64.offset;
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case BCH_EXTENT_CRC128:
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return crc->crc128.offset;
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default:
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BUG();
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}
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}
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static inline unsigned crc_nonce(const union bch_extent_crc *crc)
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{
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switch (extent_crc_type(crc)) {
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case BCH_EXTENT_CRC_NONE:
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case BCH_EXTENT_CRC32:
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return 0;
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case BCH_EXTENT_CRC64:
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return crc->crc64.nonce;
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case BCH_EXTENT_CRC128:
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return crc->crc128.nonce;
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default:
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BUG();
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}
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}
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static inline unsigned crc_csum_type(const union bch_extent_crc *crc)
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{
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switch (extent_crc_type(crc)) {
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case BCH_EXTENT_CRC_NONE:
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return 0;
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case BCH_EXTENT_CRC32:
|
|
return crc->crc32.csum_type;
|
|
case BCH_EXTENT_CRC64:
|
|
return crc->crc64.csum_type;
|
|
case BCH_EXTENT_CRC128:
|
|
return crc->crc128.csum_type;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static inline unsigned crc_compression_type(const union bch_extent_crc *crc)
|
|
{
|
|
switch (extent_crc_type(crc)) {
|
|
case BCH_EXTENT_CRC_NONE:
|
|
return 0;
|
|
case BCH_EXTENT_CRC32:
|
|
return crc->crc32.compression_type;
|
|
case BCH_EXTENT_CRC64:
|
|
return crc->crc64.compression_type;
|
|
case BCH_EXTENT_CRC128:
|
|
return crc->crc128.compression_type;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static inline struct bch_csum crc_csum(const union bch_extent_crc *crc)
|
|
{
|
|
switch (extent_crc_type(crc)) {
|
|
case BCH_EXTENT_CRC_NONE:
|
|
return (struct bch_csum) { 0 };
|
|
case BCH_EXTENT_CRC32:
|
|
return (struct bch_csum) { .lo = crc->crc32.csum };
|
|
case BCH_EXTENT_CRC64:
|
|
return (struct bch_csum) {
|
|
.lo = crc->crc64.csum_lo,
|
|
.hi = crc->crc64.csum_hi,
|
|
};
|
|
case BCH_EXTENT_CRC128:
|
|
return crc->crc128.csum;
|
|
default:
|
|
BUG();
|
|
}
|
|
}
|
|
|
|
static inline unsigned bkey_extent_is_compressed(struct bkey_s_c k)
|
|
{
|
|
struct bkey_s_c_extent e;
|
|
const struct bch_extent_ptr *ptr;
|
|
const union bch_extent_crc *crc;
|
|
unsigned ret = 0;
|
|
|
|
switch (k.k->type) {
|
|
case BCH_EXTENT:
|
|
case BCH_EXTENT_CACHED:
|
|
e = bkey_s_c_to_extent(k);
|
|
|
|
extent_for_each_ptr_crc(e, ptr, crc)
|
|
if (!ptr->cached &&
|
|
crc_compression_type(crc) != BCH_COMPRESSION_NONE &&
|
|
crc_compressed_size(e.k, crc) < k.k->size)
|
|
ret = max_t(unsigned, ret,
|
|
crc_compressed_size(e.k, crc));
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static inline unsigned extent_current_nonce(struct bkey_s_c_extent e)
|
|
{
|
|
const union bch_extent_crc *crc;
|
|
|
|
extent_for_each_crc(e, crc)
|
|
if (bch_csum_type_is_encryption(crc_csum_type(crc)))
|
|
return crc_offset(crc) + crc_nonce(crc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void bch_extent_narrow_crcs(struct bkey_s_extent);
|
|
void bch_extent_drop_redundant_crcs(struct bkey_s_extent);
|
|
|
|
/* Doesn't cleanup redundant crcs */
|
|
static inline void __bch_extent_drop_ptr(struct bkey_s_extent e,
|
|
struct bch_extent_ptr *ptr)
|
|
{
|
|
EBUG_ON(ptr < &e.v->start->ptr ||
|
|
ptr >= &extent_entry_last(e)->ptr);
|
|
EBUG_ON(ptr->type != 1 << BCH_EXTENT_ENTRY_ptr);
|
|
memmove_u64s_down(ptr, ptr + 1,
|
|
(u64 *) extent_entry_last(e) - (u64 *) (ptr + 1));
|
|
e.k->u64s -= sizeof(*ptr) / sizeof(u64);
|
|
}
|
|
|
|
static inline void bch_extent_drop_ptr(struct bkey_s_extent e,
|
|
struct bch_extent_ptr *ptr)
|
|
{
|
|
__bch_extent_drop_ptr(e, ptr);
|
|
bch_extent_drop_redundant_crcs(e);
|
|
}
|
|
|
|
const struct bch_extent_ptr *
|
|
bch_extent_has_device(struct bkey_s_c_extent, unsigned);
|
|
|
|
bool bch_cut_front(struct bpos, struct bkey_i *);
|
|
bool bch_cut_back(struct bpos, struct bkey *);
|
|
void bch_key_resize(struct bkey *, unsigned);
|
|
|
|
#endif /* _BCACHE_EXTENTS_H */
|