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net: skbuff: hide wifi_acked when CONFIG_WIRELESS not set 

Datacenter kernel builds will very likely not include WIRELESS,
so let them shave 2 bits off the skb by hiding the wifi fields.

Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2023-04-17 08:53:46 -07:00 committed by David S. Miller
parent 4edd97fbdc
commit eb6fba7555
4 changed files with 16 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
include/linux/skbuff.h
View File

@ -953,8 +953,10 @@ struct sk_buff {
__u8 l4_hash:1;
__u8 sw_hash:1;
#ifdef CONFIG_WIRELESS
__u8 wifi_acked_valid:1;
__u8 wifi_acked:1;
#endif
__u8 no_fcs:1;
/* Indicates the inner headers are valid in the skbuff. */
__u8 encapsulation:1;
@ -1187,6 +1189,15 @@ static inline unsigned int skb_napi_id(const struct sk_buff *skb)
#endif
}
static inline bool skb_wifi_acked_valid(const struct sk_buff *skb)
{
#ifdef CONFIG_WIRELESS
return skb->wifi_acked_valid;
#else
return 0;
#endif
}
/**
* skb_unref - decrement the skb's reference count
* @skb: buffer

2
include/net/sock.h
View File

@ -2697,7 +2697,7 @@ sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb)
else
sock_write_timestamp(sk, kt);
if (sock_flag(sk, SOCK_WIFI_STATUS) && skb->wifi_acked_valid)
if (sock_flag(sk, SOCK_WIFI_STATUS) && skb_wifi_acked_valid(skb))
__sock_recv_wifi_status(msg, sk, skb);
}

2
net/core/skbuff.c
View File

@ -5189,6 +5189,7 @@ void skb_tstamp_tx(struct sk_buff *orig_skb,
}
EXPORT_SYMBOL_GPL(skb_tstamp_tx);
#ifdef CONFIG_WIRELESS
void skb_complete_wifi_ack(struct sk_buff *skb, bool acked)
{
struct sock *sk = skb->sk;
@ -5214,6 +5215,7 @@ void skb_complete_wifi_ack(struct sk_buff *skb, bool acked)
kfree_skb(skb);
}
EXPORT_SYMBOL_GPL(skb_complete_wifi_ack);
#endif /* CONFIG_WIRELESS */
/**
* skb_partial_csum_set - set up and verify partial csum values for packet

2
net/socket.c
View File

@ -957,6 +957,7 @@ void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk,
}
EXPORT_SYMBOL_GPL(__sock_recv_timestamp);
#ifdef CONFIG_WIRELESS
void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)
{
@ -972,6 +973,7 @@ void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk,
put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack);
}
EXPORT_SYMBOL_GPL(__sock_recv_wifi_status);
#endif
static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk,
struct sk_buff *skb)