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bcachefs: Fix potential sleeping during mount 

During mount, bcachefs mount option processing may sleep while allocating a string buffer.

Fix this by reference counting in order to take the atomic path.

Signed-off-by: Daniel J Blueman <daniel@quora.org>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Daniel J Blueman 2023-11-12 00:38:41 +00:00 committed by Kent Overstreet
parent 069749688e
commit b783fc4d13
1 changed files with 2 additions and 0 deletions
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2
fs/bcachefs/disk_groups.c
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@ -555,6 +555,7 @@ void bch2_target_to_text(struct printbuf *out, struct bch_fs *c, unsigned v)
case TARGET_DEV: {
struct bch_dev *ca;
out->atomic++;
rcu_read_lock();
ca = t.dev < c->sb.nr_devices
? rcu_dereference(c->devs[t.dev])
@ -570,6 +571,7 @@ void bch2_target_to_text(struct printbuf *out, struct bch_fs *c, unsigned v)
}
rcu_read_unlock();
out->atomic--;
break;
}
case TARGET_GROUP: