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2cce3752ce
prep work for replaying the journal backwards Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BCACHEFS_JOURNAL_IO_H
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#define _BCACHEFS_JOURNAL_IO_H
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#include "darray.h"
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struct journal_ptr {
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bool csum_good;
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u8 dev;
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u32 bucket;
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u32 bucket_offset;
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u64 sector;
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};
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/*
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* Only used for holding the journal entries we read in btree_journal_read()
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* during cache_registration
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*/
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struct journal_replay {
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DARRAY_PREALLOCATED(struct journal_ptr, 8) ptrs;
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bool csum_good;
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bool ignore_blacklisted;
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bool ignore_not_dirty;
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/* must be last: */
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struct jset j;
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};
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static inline bool journal_replay_ignore(struct journal_replay *i)
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{
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return !i || i->ignore_blacklisted || i->ignore_not_dirty;
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}
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static inline struct jset_entry *__jset_entry_type_next(struct jset *jset,
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struct jset_entry *entry, unsigned type)
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{
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while (entry < vstruct_last(jset)) {
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if (entry->type == type)
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return entry;
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entry = vstruct_next(entry);
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}
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return NULL;
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}
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#define for_each_jset_entry_type(entry, jset, type) \
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for (struct jset_entry *entry = (jset)->start; \
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(entry = __jset_entry_type_next(jset, entry, type)); \
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entry = vstruct_next(entry))
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#define jset_entry_for_each_key(_e, _k) \
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for (struct bkey_i *_k = (_e)->start; \
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_k < vstruct_last(_e); \
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_k = bkey_next(_k))
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#define for_each_jset_key(k, entry, jset) \
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for_each_jset_entry_type(entry, jset, BCH_JSET_ENTRY_btree_keys)\
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jset_entry_for_each_key(entry, k)
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int bch2_journal_entry_validate(struct bch_fs *, struct jset *,
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struct jset_entry *, unsigned, int,
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enum bkey_invalid_flags);
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void bch2_journal_entry_to_text(struct printbuf *, struct bch_fs *,
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struct jset_entry *);
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void bch2_journal_ptrs_to_text(struct printbuf *, struct bch_fs *,
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struct journal_replay *);
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int bch2_journal_read(struct bch_fs *, u64 *, u64 *, u64 *);
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CLOSURE_CALLBACK(bch2_journal_write);
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static inline struct jset_entry *jset_entry_init(struct jset_entry **end, size_t size)
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{
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struct jset_entry *entry = *end;
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unsigned u64s = DIV_ROUND_UP(size, sizeof(u64));
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memset(entry, 0, u64s * sizeof(u64));
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/*
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* The u64s field counts from the start of data, ignoring the shared
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* fields.
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*/
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entry->u64s = cpu_to_le16(u64s - 1);
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*end = vstruct_next(*end);
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return entry;
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}
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#endif /* _BCACHEFS_JOURNAL_IO_H */
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