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bcachefs: Fix more lockdep splats in debug.c

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Similar to previous fixes, we can't incur page faults while holding
btree locks.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2023-06-21 06:44:44 -04:00
parent 462f494bc5
commit 9473cff989
4 changed files with 20 additions and 20 deletions
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2
fs/bcachefs/btree_iter.h
View File

@ -286,7 +286,7 @@ __always_inline
static inline int btree_trans_restart_nounlock(struct btree_trans *trans, int err)
{
BUG_ON(err <= 0);
BUG_ON(!bch2_err_matches(err, BCH_ERR_transaction_restart));
BUG_ON(!bch2_err_matches(-err, BCH_ERR_transaction_restart));
trans->restarted = err;
trans->last_restarted_ip = _THIS_IP_;

34
fs/bcachefs/debug.c
View File

@ -378,26 +378,25 @@ static ssize_t bch2_read_btree(struct file *file, char __user *buf,
i->size = size;
i->ret = 0;
bch2_trans_init(&trans, i->c, 0, 0);
ret = flush_buf(i);
if (ret)
return ret;
bch2_trans_init(&trans, i->c, 0, 0);
ret = for_each_btree_key2(&trans, iter, i->id, i->from,
BTREE_ITER_PREFETCH|
BTREE_ITER_ALL_SNAPSHOTS, k, ({
ret = flush_buf(i);
if (ret)
break;
bch2_bkey_val_to_text(&i->buf, i->c, k);
prt_newline(&i->buf);
0;
drop_locks_do(&trans, flush_buf(i));
}));
i->from = iter.pos;
bch2_trans_exit(&trans);
if (!ret)
ret = flush_buf(i);
bch2_trans_exit(&trans);
return ret ?: i->ret;
}
@ -429,19 +428,24 @@ static ssize_t bch2_read_btree_formats(struct file *file, char __user *buf,
return i->ret;
bch2_trans_init(&trans, i->c, 0, 0);
retry:
bch2_trans_begin(&trans);
for_each_btree_node(&trans, iter, i->id, i->from, 0, b, ret) {
ret = flush_buf(i);
if (ret)
break;
bch2_btree_node_to_text(&i->buf, i->c, b);
i->from = !bpos_eq(SPOS_MAX, b->key.k.p)
? bpos_successor(b->key.k.p)
: b->key.k.p;
ret = drop_locks_do(&trans, flush_buf(i));
if (ret)
break;
}
bch2_trans_iter_exit(&trans, &iter);
if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
goto retry;
bch2_trans_exit(&trans);
if (!ret)
@ -483,17 +487,13 @@ static ssize_t bch2_read_bfloat_failed(struct file *file, char __user *buf,
struct bkey_packed *_k =
bch2_btree_node_iter_peek(&l->iter, l->b);
ret = flush_buf(i);
if (ret)
break;
if (bpos_gt(l->b->key.k.p, i->prev_node)) {
bch2_btree_node_to_text(&i->buf, i->c, l->b);
i->prev_node = l->b->key.k.p;
}
bch2_bfloat_to_text(&i->buf, l->b, _k);
0;
drop_locks_do(&trans, flush_buf(i));
}));
i->from = iter.pos;

2
fs/bcachefs/errcode.h
View File

@ -224,7 +224,7 @@ bool __bch2_err_matches(int, int);
static inline bool _bch2_err_matches(int err, int class)
{
return err && __bch2_err_matches(err, class);
return err < 0 && __bch2_err_matches(err, class);
}
#define bch2_err_matches(_err, _class) \

2
fs/bcachefs/io.c
View File

@ -1645,7 +1645,7 @@ err_bucket_stale:
percpu_ref_put(&bch_dev_bkey_exists(c, buckets[i].b.inode)->io_ref);
/* We can retry this: */
ret = BCH_ERR_transaction_restart;
ret = -BCH_ERR_transaction_restart;
goto out;
}