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bcachefs: btree_bkey_cached_common->cached

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Add a type descriptor to btree_bkey_cached_common - there's no reason
not to since we've got padding that was otherwise unused, and this is a
nice cleanup (and helpful in later patches).

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2022-08-31 18:53:42 -04:00
parent 6b81f194f3
commit 4e6defd106
4 changed files with 9 additions and 10 deletions
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9
fs/bcachefs/btree_iter.c
View file

@ -3021,8 +3021,7 @@ void bch2_trans_exit(struct btree_trans *trans)
static void __maybe_unused
bch2_btree_path_node_to_text(struct printbuf *out,
struct btree_bkey_cached_common *b,
bool cached)
struct btree_bkey_cached_common *b)
{
struct six_lock_count c = six_lock_counts(&b->lock);
struct task_struct *owner;
@ -3035,7 +3034,7 @@ bch2_btree_path_node_to_text(struct printbuf *out,
prt_printf(out, " l=%u %s:",
b->level, bch2_btree_ids[b->btree_id]);
bch2_bpos_to_text(out, btree_node_pos(b, cached));
bch2_bpos_to_text(out, btree_node_pos(b));
prt_printf(out, " locks %u:%u:%u held by pid %u",
c.n[0], c.n[1], c.n[2], pid);
@ -3068,7 +3067,7 @@ void bch2_btree_trans_to_text(struct printbuf *out, struct btree_trans *trans)
!IS_ERR_OR_NULL(b = (void *) READ_ONCE(path->l[l].b))) {
prt_printf(out, " %c l=%u ",
lock_types[btree_node_locked_type(path, l)], l);
bch2_btree_path_node_to_text(out, b, path->cached);
bch2_btree_path_node_to_text(out, b);
prt_printf(out, "\n");
}
}
@ -3086,7 +3085,7 @@ void bch2_btree_trans_to_text(struct printbuf *out, struct btree_trans *trans)
bch2_bpos_to_text(out, trans->locking_pos);
prt_printf(out, " node ");
bch2_btree_path_node_to_text(out, b, path->cached);
bch2_btree_path_node_to_text(out, b);
prt_printf(out, "\n");
}
}

1
fs/bcachefs/btree_key_cache.c
View file

@ -204,6 +204,7 @@ bkey_cached_alloc(struct btree_trans *trans,
INIT_LIST_HEAD(&ck->list);
__six_lock_init(&ck->c.lock, "b->c.lock", &bch2_btree_node_lock_key);
lockdep_set_novalidate_class(&ck->c.lock);
ck->c.cached = true;
BUG_ON(!six_trylock_intent(&ck->c.lock));
BUG_ON(!six_trylock_write(&ck->c.lock));
return ck;

3
fs/bcachefs/btree_locking.c
View file

@ -144,8 +144,7 @@ int __bch2_btree_node_lock(struct btree_trans *trans,
/* Must lock btree nodes in key order: */
if (btree_node_locked(linked, level) &&
bpos_cmp(pos, btree_node_pos(&linked->l[level].b->c,
linked->cached)) <= 0) {
bpos_cmp(pos, btree_node_pos(&linked->l[level].b->c)) <= 0) {
reason = 7;
goto deadlock;
}

6
fs/bcachefs/btree_types.h
View file

@ -63,6 +63,7 @@ struct btree_bkey_cached_common {
struct six_lock lock;
u8 level;
u8 btree_id;
bool cached;
};
struct btree {
@ -335,10 +336,9 @@ struct bkey_cached {
struct bkey_i *k;
};
static inline struct bpos btree_node_pos(struct btree_bkey_cached_common *b,
bool cached)
static inline struct bpos btree_node_pos(struct btree_bkey_cached_common *b)
{
return !cached
return !b->cached
? container_of(b, struct btree, c)->key.k.p
: container_of(b, struct bkey_cached, c)->key.pos;
}