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netfilter: nft_set_pipapo: make pipapo_clone helper return NULL

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Currently it returns an error pointer, but the only possible failure
is ENOMEM.

After a followup patch, we'd need to discard the errno code, i.e.

x = pipapo_clone()
if (IS_ERR(x))
	return NULL

or make more changes to fix up callers to expect IS_ERR() code
from set->ops->deactivate().

So simplify this and make it return ptr-or-null.

Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Stefano Brivio <sbrivio@redhat.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This commit is contained in:
Florian Westphal 2024-04-25 14:06:41 +02:00 committed by Pablo Neira Ayuso
parent a590f47609
commit 80efd2997f
1 changed files with 7 additions and 7 deletions
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14
net/netfilter/nft_set_pipapo.c
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@ -1395,7 +1395,7 @@ static int nft_pipapo_insert(const struct net *net, const struct nft_set *set,
* pipapo_clone() - Clone matching data to create new working copy
* @old: Existing matching data
*
* Return: copy of matching data passed as 'old', error pointer on failure
* Return: copy of matching data passed as 'old' or NULL.
*/
static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old)
{
@ -1405,7 +1405,7 @@ static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old)
new = kmalloc(struct_size(new, f, old->field_count), GFP_KERNEL);
if (!new)
return ERR_PTR(-ENOMEM);
return NULL;
new->field_count = old->field_count;
new->bsize_max = old->bsize_max;
@ -1477,7 +1477,7 @@ out_scratch:
free_percpu(new->scratch);
kfree(new);
return ERR_PTR(-ENOMEM);
return NULL;
}
/**
@ -1797,7 +1797,7 @@ static void nft_pipapo_commit(struct nft_set *set)
return;
new_clone = pipapo_clone(priv->clone);
if (IS_ERR(new_clone))
if (!new_clone)
return;
priv->dirty = false;
@ -1821,7 +1821,7 @@ static void nft_pipapo_abort(const struct nft_set *set)
m = rcu_dereference_protected(priv->match, nft_pipapo_transaction_mutex_held(set));
new_clone = pipapo_clone(m);
if (IS_ERR(new_clone))
if (!new_clone)
return;
priv->dirty = false;
@ -2269,8 +2269,8 @@ static int nft_pipapo_init(const struct nft_set *set,
/* Create an initial clone of matching data for next insertion */
priv->clone = pipapo_clone(m);
if (IS_ERR(priv->clone)) {
err = PTR_ERR(priv->clone);
if (!priv->clone) {
err = -ENOMEM;
goto out_free;
}