[PATCH net-next v2 2/9] netconsole: move netpoll_send_udp() from netpoll
From: Breno Leitao <leitao@debian.org>
Date: 2026-05-12 10:48:36
Also in:
linux-rt-devel, lkml
Subsystem:
netconsole, networking drivers, networking [general], the rest · Maintainers:
Breno Leitao, Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Move netpoll_send_udp() from net/core/netpoll.c into drivers/net/netconsole.c as a static helper, drop EXPORT_SYMBOL(), and remove the prototype from include/linux/netpoll.h. netconsole was the only in-tree caller of this entry point. Every other netpoll consumer (bonding, team, vlan, bridge, macvlan, dsa) already builds its own sk_buff and hands it to netpoll_send_skb(), so the netpoll send-side interface is now skb-only. The helpers it depends on (find_skb(), push_ipv6(), push_ipv4(), push_udp(), push_eth(), netpoll_udp_checksum()) were exposed in the previous patches and stay in net/core/netpoll.c for now. Subsequent patches move each of them into netconsole one at a time and drop the corresponding EXPORT_SYMBOL_GPL. Pull <linux/ip.h>, <linux/ipv6.h> and <linux/udp.h> into netconsole.c so the moved code can name the header structures. Signed-off-by: Breno Leitao <leitao@debian.org> --- drivers/net/netconsole.c | 38 ++++++++++++++++++++++++++++++++++++++ include/linux/netpoll.h | 1 - net/core/netpoll.c | 37 ------------------------------------- 3 files changed, 38 insertions(+), 38 deletions(-)
diff --git a/drivers/net/netconsole.c b/drivers/net/netconsole.c
index 57dd6821a8aa9..56f310041ebda 100644
--- a/drivers/net/netconsole.c
+++ b/drivers/net/netconsole.c@@ -32,6 +32,9 @@ #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/string.h> +#include <linux/ip.h> +#include <linux/ipv6.h> +#include <linux/udp.h> #include <linux/netpoll.h> #include <linux/inet.h> #include <linux/configfs.h>
@@ -1648,6 +1651,41 @@ static struct notifier_block netconsole_netdev_notifier = { .notifier_call = netconsole_netdev_event, }; +static int netpoll_send_udp(struct netpoll *np, const char *msg, int len) +{ + int total_len, ip_len, udp_len; + struct sk_buff *skb; + + if (!IS_ENABLED(CONFIG_PREEMPT_RT)) + WARN_ON_ONCE(!irqs_disabled()); + + udp_len = len + sizeof(struct udphdr); + if (np->ipv6) + ip_len = udp_len + sizeof(struct ipv6hdr); + else + ip_len = udp_len + sizeof(struct iphdr); + + total_len = ip_len + LL_RESERVED_SPACE(np->dev); + + skb = find_skb(np, total_len + np->dev->needed_tailroom, + total_len - len); + if (!skb) + return -ENOMEM; + + skb_copy_to_linear_data(skb, msg, len); + skb_put(skb, len); + + push_udp(np, skb, len); + if (np->ipv6) + push_ipv6(np, skb, len); + else + push_ipv4(np, skb, len); + push_eth(np, skb); + skb->dev = np->dev; + + return (int)netpoll_send_skb(np, skb); +} + /** * send_udp - Wrapper for netpoll_send_udp that counts errors * @nt: target to send message to
diff --git a/include/linux/netpoll.h b/include/linux/netpoll.h
index e68c80b329411..57be72bb82dc9 100644
--- a/include/linux/netpoll.h
+++ b/include/linux/netpoll.h@@ -67,7 +67,6 @@ static inline void netpoll_poll_disable(struct net_device *dev) { return; } static inline void netpoll_poll_enable(struct net_device *dev) { return; } #endif -int netpoll_send_udp(struct netpoll *np, const char *msg, int len); int __netpoll_setup(struct netpoll *np, struct net_device *ndev); int netpoll_setup(struct netpoll *np); void __netpoll_free(struct netpoll *np);
diff --git a/net/core/netpoll.c b/net/core/netpoll.c
index 41305056c56ff..39209308efad0 100644
--- a/net/core/netpoll.c
+++ b/net/core/netpoll.c@@ -499,43 +499,6 @@ void push_eth(struct netpoll *np, struct sk_buff *skb) } EXPORT_SYMBOL_GPL(push_eth); -int netpoll_send_udp(struct netpoll *np, const char *msg, int len) -{ - int total_len, ip_len, udp_len; - struct sk_buff *skb; - - if (!IS_ENABLED(CONFIG_PREEMPT_RT)) - WARN_ON_ONCE(!irqs_disabled()); - - udp_len = len + sizeof(struct udphdr); - if (np->ipv6) - ip_len = udp_len + sizeof(struct ipv6hdr); - else - ip_len = udp_len + sizeof(struct iphdr); - - total_len = ip_len + LL_RESERVED_SPACE(np->dev); - - skb = find_skb(np, total_len + np->dev->needed_tailroom, - total_len - len); - if (!skb) - return -ENOMEM; - - skb_copy_to_linear_data(skb, msg, len); - skb_put(skb, len); - - push_udp(np, skb, len); - if (np->ipv6) - push_ipv6(np, skb, len); - else - push_ipv4(np, skb, len); - push_eth(np, skb); - skb->dev = np->dev; - - return (int)netpoll_send_skb(np, skb); -} -EXPORT_SYMBOL(netpoll_send_udp); - - static void skb_pool_flush(struct netpoll *np) { struct sk_buff_head *skb_pool;
--
2.53.0-Meta