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bcachefs: Move nocow unlock to bch2_write_endio()

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This fixes a lifetime issue; bch2_nocow_write_unlock() uses
PTR_BUCKET_POS(), which needs the device - but we drop our ref to the
device in bch2_write_endio().

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-05-01 18:56:40 -04:00
parent b6d29b5869
commit 6202569777
2 changed files with 8 additions and 19 deletions
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26
fs/bcachefs/io_write.c
View File

@ -434,6 +434,8 @@ void bch2_submit_wbio_replicas(struct bch_write_bio *wbio, struct bch_fs *c,
n->nocow = nocow;
n->submit_time = local_clock();
n->inode_offset = bkey_start_offset(&k->k);
if (nocow)
n->nocow_bucket = PTR_BUCKET_NR(ca, ptr);
n->bio.bi_iter.bi_sector = ptr->offset;
if (likely(n->have_ioref)) {
@ -659,8 +661,12 @@ static void bch2_write_endio(struct bio *bio)
op->flags |= BCH_WRITE_IO_ERROR;
}
if (wbio->nocow)
if (wbio->nocow) {
bch2_bucket_nocow_unlock(&c->nocow_locks,
POS(ca->dev_idx, wbio->nocow_bucket),
BUCKET_NOCOW_LOCK_UPDATE);
set_bit(wbio->dev, op->devs_need_flush->d);
}
if (wbio->have_ioref) {
bch2_latency_acct(ca, wbio->submit_time, WRITE);
@ -1114,22 +1120,6 @@ static bool bch2_extent_is_writeable(struct bch_write_op *op,
return replicas >= op->opts.data_replicas;
}
static inline void bch2_nocow_write_unlock(struct bch_write_op *op)
{
struct bch_fs *c = op->c;
for_each_keylist_key(&op->insert_keys, k) {
struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(bkey_i_to_s_c(k));
bkey_for_each_ptr(ptrs, ptr) {
struct bch_dev *ca = bch2_dev_bkey_exists(c, ptr->dev);
bch2_bucket_nocow_unlock(&c->nocow_locks,
PTR_BUCKET_POS(ca, ptr),
BUCKET_NOCOW_LOCK_UPDATE);
}
}
}
static int bch2_nocow_write_convert_one_unwritten(struct btree_trans *trans,
struct btree_iter *iter,
struct bkey_i *orig,
@ -1200,8 +1190,6 @@ static void bch2_nocow_write_convert_unwritten(struct bch_write_op *op)
static void __bch2_nocow_write_done(struct bch_write_op *op)
{
bch2_nocow_write_unlock(op);
if (unlikely(op->flags & BCH_WRITE_IO_ERROR)) {
op->error = -EIO;
} else if (unlikely(op->flags & BCH_WRITE_CONVERT_UNWRITTEN))

1
fs/bcachefs/io_write_types.h
View File

@ -20,6 +20,7 @@ struct bch_write_bio {
u64 submit_time;
u64 inode_offset;
u64 nocow_bucket;
struct bch_devs_list failed;
u8 dev;