/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _BCACHEFS_BTREE_UPDATE_H
#define _BCACHEFS_BTREE_UPDATE_H
#include "btree_iter.h"
#include "journal.h"
struct bch_fs;
struct btree;
void bch2_btree_node_prep_for_write(struct btree_trans *,
struct btree_path *, struct btree *);
bool bch2_btree_bset_insert_key(struct btree_trans *, struct btree_path *,
struct btree *, struct btree_node_iter *,
struct bkey_i *);
int bch2_btree_node_flush0(struct journal *, struct journal_entry_pin *, u64);
int bch2_btree_node_flush1(struct journal *, struct journal_entry_pin *, u64);
void bch2_btree_add_journal_pin(struct bch_fs *, struct btree *, u64);
void bch2_btree_insert_key_leaf(struct btree_trans *, struct btree_path *,
struct bkey_i *, u64);
#define BCH_TRANS_COMMIT_FLAGS() \
x(no_enospc, "don't check for enospc") \
x(no_check_rw, "don't attempt to take a ref on c->writes") \
x(lazy_rw, "go read-write if we haven't yet - only for use in recovery") \
x(no_journal_res, "don't take a journal reservation, instead " \
"pin journal entry referred to by trans->journal_res.seq") \
x(journal_reclaim, "operation required for journal reclaim; may return error" \
"instead of deadlocking if BCH_WATERMARK_reclaim not specified")\
x(skip_accounting_apply, "we're in journal replay - accounting updates have already been applied")
enum __bch_trans_commit_flags {
/* First bits for bch_watermark: */
__BCH_TRANS_COMMIT_FLAGS_START = BCH_WATERMARK_BITS,
#define x(n, ...) __BCH_TRANS_COMMIT_##n,
BCH_TRANS_COMMIT_FLAGS()
#undef x
};
enum bch_trans_commit_flags {
#define x(n, ...) BCH_TRANS_COMMIT_##n = BIT(__BCH_TRANS_COMMIT_##n),
BCH_TRANS_COMMIT_FLAGS()
#undef x
};
void bch2_trans_commit_flags_to_text(struct printbuf *, enum bch_trans_commit_flags);
int bch2_btree_delete_extent_at(struct btree_trans *, struct btree_iter *,
unsigned, unsigned);
int bch2_btree_delete_at(struct btree_trans *, struct btree_iter *, unsigned);
int bch2_btree_delete(struct btree_trans *, enum btree_id, struct bpos, unsigned);
int bch2_btree_insert_nonextent(struct btree_trans *, enum btree_id,
struct bkey_i *, enum btree_iter_update_trigger_flags);
int bch2_btree_insert_trans(struct btree_trans *, enum btree_id, struct bkey_i *,
enum btree_iter_update_trigger_flags);
int bch2_btree_insert(struct bch_fs *, enum btree_id, struct bkey_i *, struct
disk_reservation *, int flags, enum
btree_iter_update_trigger_flags iter_flags);
int bch2_btree_delete_range_trans(struct btree_trans *, enum btree_id,
struct bpos, struct bpos, unsigned, u64 *);
int bch2_btree_delete_range(struct bch_fs *, enum btree_id,
struct bpos, struct bpos, unsigned, u64 *);
int bch2_btree_bit_mod(struct btree_trans *, enum btree_id, struct bpos, bool);
int bch2_btree_bit_mod_buffered(struct btree_trans *, enum btree_id, struct bpos, bool);
static inline int bch2_btree_delete_at_buffered(struct btree_trans *trans,
enum btree_id btree, struct bpos pos)
{
return bch2_btree_bit_mod_buffered(trans, btree, pos, false);
}
int __bch2_insert_snapshot_whiteouts(struct btree_trans *, enum btree_id,
struct bpos, struct bpos);
/*
* For use when splitting extents in existing snapshots:
*
* If @old_pos is an interior snapshot node, iterate over descendent snapshot
* nodes: for every descendent snapshot in whiche @old_pos is overwritten and
* not visible, emit a whiteout at @new_pos.
*/
static inline int bch2_insert_snapshot_whiteouts(struct btree_trans *trans,
enum btree_id btree,
struct bpos old_pos,
struct bpos new_pos)
{
if (!btree_type_has_snapshots(btree) ||
bkey_eq(old_pos, new_pos))
return 0;
return __bch2_insert_snapshot_whiteouts(trans, btree, old_pos, new_pos);
}
int bch2_trans_update_extent_overwrite(struct btree_trans *, struct btree_iter *,
enum btree_iter_update_trigger_flags,
struct bkey_s_c, struct bkey_s_c);
int bch2_bkey_get_empty_slot(struct btree_trans *, struct btree_iter *,
enum btree_id, struct bpos);
int __must_check bch2_trans_update(struct btree_trans *, struct btree_iter *,
struct bkey_i *, enum btree_iter_update_trigger_flags);
struct jset_entry *__bch2_trans_jset_entry_alloc(struct btree_trans *, unsigned);
static inline struct jset_entry *btree_trans_journal_entries_top(struct btree_trans *trans)
{
return (void *) ((u64 *) trans->journal_entries + trans->journal_entries_u64s);
}
static inline struct jset_entry *
bch2_trans_jset_entry_alloc(struct btree_trans *trans, unsigned u64s)
{
if (!trans->journal_entries ||
trans->journal_entries_u64s + u64s > trans->journal_entries_size)
return __bch2_trans_jset_entry_alloc(trans, u64s);
struct jset_entry *e = btree_trans_journal_entries_top(trans);
trans->journal_entries_u64s += u64s;
return e;
}
int bch2_btree_insert_clone_trans(struct btree_trans *, enum btree_id, struct bkey_i *);
static inline int __must_check bch2_trans_update_buffered(struct btree_trans *trans,
enum btree_id btree,
struct bkey_i *k)
{
/*
* Most updates skip the btree write buffer until journal replay is
* finished because synchronization with journal replay relies on having
* a btree node locked - if we're overwriting a key in the journal that
* journal replay hasn't yet replayed, we have to mark it as
* overwritten.
*
* But accounting updates don't overwrite, they're deltas, and they have
* to be flushed to the btree strictly in order for journal replay to be
* able to tell which updates need to be applied:
*/
if (k->k.type != KEY_TYPE_accounting &&
unlikely(trans->journal_replay_not_finished))
return bch2_btree_insert_clone_trans(trans, btree, k);
struct jset_entry *e = bch2_trans_jset_entry_alloc(trans, jset_u64s(k->k.u64s));
int ret = PTR_ERR_OR_ZERO(e);
if (ret)
return ret;
journal_entry_init(e, BCH_JSET_ENTRY_write_buffer_keys, btree, 0, k->k.u64s);
bkey_copy(e->start, k);
return 0;
}
void bch2_trans_commit_hook(struct btree_trans *,
struct btree_trans_commit_hook *);
int __bch2_trans_commit(struct btree_trans *, unsigned);
__printf(2, 3) int bch2_fs_log_msg(struct bch_fs *, const char *, ...);
__printf(2, 3) int bch2_journal_log_msg(struct bch_fs *, const char *, ...);
/**
* bch2_trans_commit - insert keys at given iterator positions
*
* This is main entry point for btree updates.
*
* Return values:
* -EROFS: filesystem read only
* -EIO: journal or btree node IO error
*/
static inline int bch2_trans_commit(struct btree_trans *trans,
struct disk_reservation *disk_res,
u64 *journal_seq,
unsigned flags)
{
trans->disk_res = disk_res;
trans->journal_seq = journal_seq;
return __bch2_trans_commit(trans, flags);
}
#define commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
(_journal_seq), (_flags)))
#define nested_commit_do(_trans, _disk_res, _journal_seq, _flags, _do) \
nested_lockrestart_do(_trans, _do ?: bch2_trans_commit(_trans, (_disk_res),\
(_journal_seq), (_flags)))
#define bch2_trans_do(_c, _disk_res, _journal_seq, _flags, _do) \
bch2_trans_run(_c, commit_do(trans, _disk_res, _journal_seq, _flags, _do))
#define trans_for_each_update(_trans, _i) \
for (struct btree_insert_entry *_i = (_trans)->updates; \
(_i) < (_trans)->updates + (_trans)->nr_updates; \
(_i)++)
static inline void bch2_trans_reset_updates(struct btree_trans *trans)
{
trans_for_each_update(trans, i)
bch2_path_put(trans, i->path, true);
trans->nr_updates = 0;
trans->journal_entries_u64s = 0;
trans->hooks = NULL;
trans->extra_disk_res = 0;
}
static inline struct bkey_i *__bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k,
unsigned type, unsigned min_bytes)
{
unsigned bytes = max_t(unsigned, min_bytes, bkey_bytes(k.k));
struct bkey_i *mut;
if (type && k.k->type != type)
return ERR_PTR(-ENOENT);
/* extra padding for varint_decode_fast... */
mut = bch2_trans_kmalloc_nomemzero(trans, bytes + 8);
if (!IS_ERR(mut)) {
bkey_reassemble(mut, k);
if (unlikely(bytes > bkey_bytes(k.k))) {
memset((void *) mut + bkey_bytes(k.k), 0,
bytes - bkey_bytes(k.k));
mut->k.u64s = DIV_ROUND_UP(bytes, sizeof(u64));
}
}
return mut;
}
static inline struct bkey_i *bch2_bkey_make_mut_noupdate(struct btree_trans *trans, struct bkey_s_c k)
{
return __bch2_bkey_make_mut_noupdate(trans, k, 0, 0);
}
#define bch2_bkey_make_mut_noupdate_typed(_trans, _k, _type) \
bkey_i_to_##_type(__bch2_bkey_make_mut_noupdate(_trans, _k, \
KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
static inline struct bkey_i *__bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
struct bkey_s_c *k, unsigned flags,
unsigned type, unsigned min_bytes)
{
struct bkey_i *mut = __bch2_bkey_make_mut_noupdate(trans, *k, type, min_bytes);
int ret;
if (IS_ERR(mut))
return mut;
ret = bch2_trans_update(trans, iter, mut, flags);
if (ret)
return ERR_PTR(ret);
*k = bkey_i_to_s_c(mut);
return mut;
}
static inline struct bkey_i *bch2_bkey_make_mut(struct btree_trans *trans, struct btree_iter *iter,
struct bkey_s_c *k, unsigned flags)
{
return __bch2_bkey_make_mut(trans, iter, k, flags, 0, 0);
}
#define bch2_bkey_make_mut_typed(_trans, _iter, _k, _flags, _type) \
bkey_i_to_##_type(__bch2_bkey_make_mut(_trans, _iter, _k, _flags,\
KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
static inline struct bkey_i *__bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
struct btree_iter *iter,
unsigned btree_id, struct bpos pos,
unsigned flags, unsigned type, unsigned min_bytes)
{
struct bkey_s_c k = __bch2_bkey_get_iter(trans, iter,
btree_id, pos, flags|BTREE_ITER_intent, type);
struct bkey_i *ret = IS_ERR(k.k)
? ERR_CAST(k.k)
: __bch2_bkey_make_mut_noupdate(trans, k, 0, min_bytes);
if (IS_ERR(ret))
bch2_trans_iter_exit(trans, iter);
return ret;
}
static inline struct bkey_i *bch2_bkey_get_mut_noupdate(struct btree_trans *trans,
struct btree_iter *iter,
unsigned btree_id, struct bpos pos,
unsigned flags)
{
return __bch2_bkey_get_mut_noupdate(trans, iter, btree_id, pos, flags, 0, 0);
}
static inline struct bkey_i *__bch2_bkey_get_mut(struct btree_trans *trans,
struct btree_iter *iter,
unsigned btree_id, struct bpos pos,
unsigned flags, unsigned type, unsigned min_bytes)
{
struct bkey_i *mut = __bch2_bkey_get_mut_noupdate(trans, iter,
btree_id, pos, flags|BTREE_ITER_intent, type, min_bytes);
int ret;
if (IS_ERR(mut))
return mut;
ret = bch2_trans_update(trans, iter, mut, flags);
if (ret) {
bch2_trans_iter_exit(trans, iter);
return ERR_PTR(ret);
}
return mut;
}
static inline struct bkey_i *bch2_bkey_get_mut_minsize(struct btree_trans *trans,
struct btree_iter *iter,
unsigned btree_id, struct bpos pos,
unsigned flags, unsigned min_bytes)
{
return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, min_bytes);
}
static inline struct bkey_i *bch2_bkey_get_mut(struct btree_trans *trans,
struct btree_iter *iter,
unsigned btree_id, struct bpos pos,
unsigned flags)
{
return __bch2_bkey_get_mut(trans, iter, btree_id, pos, flags, 0, 0);
}
#define bch2_bkey_get_mut_typed(_trans, _iter, _btree_id, _pos, _flags, _type)\
bkey_i_to_##_type(__bch2_bkey_get_mut(_trans, _iter, \
_btree_id, _pos, _flags, \
KEY_TYPE_##_type, sizeof(struct bkey_i_##_type)))
static inline struct bkey_i *__bch2_bkey_alloc(struct btree_trans *trans, struct btree_iter *iter,
unsigned flags, unsigned type, unsigned val_size)
{
struct bkey_i *k = bch2_trans_kmalloc(trans, sizeof(*k) + val_size);
int ret;
if (IS_ERR(k))
return k;
bkey_init(&k->k);
k->k.p = iter->pos;
k->k.type = type;
set_bkey_val_bytes(&k->k, val_size);
ret = bch2_trans_update(trans, iter, k, flags);
if (unlikely(ret))
return ERR_PTR(ret);
return k;
}
#define bch2_bkey_alloc(_trans, _iter, _flags, _type) \
bkey_i_to_##_type(__bch2_bkey_alloc(_trans, _iter, _flags, \
KEY_TYPE_##_type, sizeof(struct bch_##_type)))
#endif /* _BCACHEFS_BTREE_UPDATE_H */
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