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netpoll: expose UDP packet builder helpers for netconsole

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Promote each from file-static to EXPORT_SYMBOL_GPL and forward-
declare them in include/linux/netpoll.h so netconsole can call
them once netpoll_send_udp() moves out.

These exports are kept until the end of the series, when
al of them move into netconsole.

No functional change.

Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20260512-netconsole_split-v2-1-1191d14ad66d@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao 2026-05-12 03:46:34 -07:00 committed by Jakub Kicinski
parent 1f8fd0fe56
commit 06baf87e21
2 changed files with 19 additions and 7 deletions
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6
include/linux/netpoll.h
View File

@ -74,6 +74,12 @@ void __netpoll_free(struct netpoll *np);
void netpoll_cleanup(struct netpoll *np);
void do_netpoll_cleanup(struct netpoll *np);
netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb);
struct sk_buff *find_skb(struct netpoll *np, int len, int reserve);
void netpoll_udp_checksum(struct netpoll *np, struct sk_buff *skb, int len);
void push_ipv6(struct netpoll *np, struct sk_buff *skb, int len);
void push_ipv4(struct netpoll *np, struct sk_buff *skb, int len);
void push_udp(struct netpoll *np, struct sk_buff *skb, int len);
void push_eth(struct netpoll *np, struct sk_buff *skb);
#ifdef CONFIG_NETPOLL
static inline void *netpoll_poll_lock(struct napi_struct *napi)

20
net/core/netpoll.c
View File

@ -268,7 +268,7 @@ static void zap_completion_queue(void)
put_cpu_var(softnet_data);
}
static struct sk_buff *find_skb(struct netpoll *np, int len, int reserve)
struct sk_buff *find_skb(struct netpoll *np, int len, int reserve)
{
int count = 0;
struct sk_buff *skb;
@ -294,6 +294,7 @@ static struct sk_buff *find_skb(struct netpoll *np, int len, int reserve)
skb_reserve(skb, reserve);
return skb;
}
EXPORT_SYMBOL_GPL(find_skb);
static int netpoll_owner_active(struct net_device *dev)
{
@ -369,8 +370,8 @@ static netdev_tx_t __netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
return ret;
}
static void netpoll_udp_checksum(struct netpoll *np, struct sk_buff *skb,
int len)
void netpoll_udp_checksum(struct netpoll *np, struct sk_buff *skb,
int len)
{
struct udphdr *udph;
int udp_len;
@ -393,6 +394,7 @@ static void netpoll_udp_checksum(struct netpoll *np, struct sk_buff *skb,
if (udph->check == 0)
udph->check = CSUM_MANGLED_0;
}
EXPORT_SYMBOL_GPL(netpoll_udp_checksum);
netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
{
@ -411,7 +413,7 @@ netdev_tx_t netpoll_send_skb(struct netpoll *np, struct sk_buff *skb)
}
EXPORT_SYMBOL(netpoll_send_skb);
static void push_ipv6(struct netpoll *np, struct sk_buff *skb, int len)
void push_ipv6(struct netpoll *np, struct sk_buff *skb, int len)
{
struct ipv6hdr *ip6h;
@ -433,8 +435,9 @@ static void push_ipv6(struct netpoll *np, struct sk_buff *skb, int len)
skb->protocol = htons(ETH_P_IPV6);
}
EXPORT_SYMBOL_GPL(push_ipv6);
static void push_ipv4(struct netpoll *np, struct sk_buff *skb, int len)
void push_ipv4(struct netpoll *np, struct sk_buff *skb, int len)
{
static atomic_t ip_ident;
struct iphdr *iph;
@ -460,8 +463,9 @@ static void push_ipv4(struct netpoll *np, struct sk_buff *skb, int len)
iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
skb->protocol = htons(ETH_P_IP);
}
EXPORT_SYMBOL_GPL(push_ipv4);
static void push_udp(struct netpoll *np, struct sk_buff *skb, int len)
void push_udp(struct netpoll *np, struct sk_buff *skb, int len)
{
struct udphdr *udph;
int udp_len;
@ -478,8 +482,9 @@ static void push_udp(struct netpoll *np, struct sk_buff *skb, int len)
netpoll_udp_checksum(np, skb, len);
}
EXPORT_SYMBOL_GPL(push_udp);
static void push_eth(struct netpoll *np, struct sk_buff *skb)
void push_eth(struct netpoll *np, struct sk_buff *skb)
{
struct ethhdr *eth;
@ -492,6 +497,7 @@ static void push_eth(struct netpoll *np, struct sk_buff *skb)
else
eth->h_proto = htons(ETH_P_IP);
}
EXPORT_SYMBOL_GPL(push_eth);
int netpoll_send_udp(struct netpoll *np, const char *msg, int len)
{