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bcachefs: Fix bch2_dev_lookup() refcounting

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bch2_dev_lookup() is supposed to take a ref on the device it returns, but
for_each_member_device() takes refs as it iterates,
for_each_member_device_rcu() does not.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-05-04 12:51:49 -04:00
parent 1267df40ac
commit 3a2d025927
1 changed files with 2 additions and 6 deletions
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8
fs/bcachefs/super.c
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@ -2004,13 +2004,9 @@ int bch2_dev_resize(struct bch_fs *c, struct bch_dev *ca, u64 nbuckets)
/* return with ref on ca->ref: */
struct bch_dev *bch2_dev_lookup(struct bch_fs *c, const char *name)
{
rcu_read_lock();
for_each_member_device_rcu(c, ca, NULL)
if (!strcmp(name, ca->name)) {
rcu_read_unlock();
for_each_member_device(c, ca)
if (!strcmp(name, ca->name))
return ca;
}
rcu_read_unlock();
return ERR_PTR(-BCH_ERR_ENOENT_dev_not_found);
}