From 5a6e43af1e5341a11a719270cef9d846b0bbfaa5 Mon Sep 17 00:00:00 2001 From: Kent Overstreet Date: Wed, 4 Sep 2024 15:48:59 -0400 Subject: [PATCH] bcachefs: Fix ca->io_ref usage ca->io_ref does not protect against the filesystem going way, c->write_ref does. Much like 0b50b7313ef2 bcachefs: Fix refcounting in discard path the other async paths need fixing. Signed-off-by: Kent Overstreet --- fs/bcachefs/alloc_background.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/fs/bcachefs/alloc_background.c b/fs/bcachefs/alloc_background.c index ba46f1c1d78aa..dc3a4024aab6f 100644 --- a/fs/bcachefs/alloc_background.c +++ b/fs/bcachefs/alloc_background.c @@ -1968,8 +1968,8 @@ static void bch2_do_discards_fast_work(struct work_struct *work) break; } - bch2_write_ref_put(c, BCH_WRITE_REF_discard_fast); percpu_ref_put(&ca->io_ref); + bch2_write_ref_put(c, BCH_WRITE_REF_discard_fast); } static void bch2_discard_one_bucket_fast(struct bch_dev *ca, u64 bucket) @@ -1979,18 +1979,18 @@ static void bch2_discard_one_bucket_fast(struct bch_dev *ca, u64 bucket) if (discard_in_flight_add(ca, bucket, false)) return; - if (!bch2_dev_get_ioref(c, ca->dev_idx, WRITE)) + if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_discard_fast)) return; - if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_discard_fast)) - goto put_ioref; + if (!bch2_dev_get_ioref(c, ca->dev_idx, WRITE)) + goto put_ref; if (queue_work(c->write_ref_wq, &ca->discard_fast_work)) return; - bch2_write_ref_put(c, BCH_WRITE_REF_discard_fast); -put_ioref: percpu_ref_put(&ca->io_ref); +put_ref: + bch2_write_ref_put(c, BCH_WRITE_REF_discard_fast); } static int invalidate_one_bucket(struct btree_trans *trans, @@ -2132,26 +2132,26 @@ static void bch2_do_invalidates_work(struct work_struct *work) bch2_trans_iter_exit(trans, &iter); err: bch2_trans_put(trans); - bch2_write_ref_put(c, BCH_WRITE_REF_invalidate); percpu_ref_put(&ca->io_ref); + bch2_write_ref_put(c, BCH_WRITE_REF_invalidate); } void bch2_dev_do_invalidates(struct bch_dev *ca) { struct bch_fs *c = ca->fs; - if (!bch2_dev_get_ioref(c, ca->dev_idx, WRITE)) + if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_invalidate)) return; - if (!bch2_write_ref_tryget(c, BCH_WRITE_REF_invalidate)) - goto put_ioref; + if (!bch2_dev_get_ioref(c, ca->dev_idx, WRITE)) + goto put_ref; if (queue_work(c->write_ref_wq, &ca->invalidate_work)) return; - bch2_write_ref_put(c, BCH_WRITE_REF_invalidate); -put_ioref: percpu_ref_put(&ca->io_ref); +put_ref: + bch2_write_ref_put(c, BCH_WRITE_REF_invalidate); } void bch2_do_invalidates(struct bch_fs *c) -- 2.49.0