Re: [PATCH 1/4 v2] net: Introduce sk_tx_queue_mapping

[Eric Dumazet <eric.dumazet@gmail.com>]

Krishna Kumar a écrit :
> From: Krishna Kumar <krkumar2@in.ibm.com>
> 
> Introduce sk_tx_queue_mapping; and functions that set, test and get
> this value. Reset sk_tx_queue_mapping to -1 whenever the dst cache
> is set/reset, and in socket alloc & free (free probably doesn't need
> it).
> 

Could you please use an u16 instead, and take the convention of 0
being the 'unitialized value' ?

And define sk_tx_queue_clear(sk) instead of sk_record_tx_queue(sk, -1);

I also suggest using following names :

static inline void sk_tx_queue_set(struct sock *sk, u16 tx_queue)
{
	sk->sk_tx_queue_mapping = tx_queue + 1;
}

static inline u16 sk_tx_queue_get(const struct sock *sk)
{
	return sk->sk_tx_queue_mapping - 1;
}

static inline u16 sk_tx_queue_clear(struct sock *sk) // or _reset
{
	sk->sk_tx_queue_mapping = 0;
}

static inline bool sk_tx_queue_recorded(const struct sock *sk)
{
	return (sk && sk->sk_tx_queue_mapping > 0);
}


> @@ -1016,6 +1019,8 @@ static void sk_prot_free(struct proto *p
>  	struct kmem_cache *slab;
>  	struct module *owner;
>  
> +	sk_record_tx_queue(sk, -1);
> +
>  	owner = prot->owner;
>  	slab = prot->slab;
>  

This is not necessary, we are going to kfree(sk) anyway !