diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/can/core.h | 1 | ||||
| -rw-r--r-- | include/linux/can/skb.h | 38 | ||||
| -rw-r--r-- | include/linux/skbuff.h | 3 | ||||
| -rw-r--r-- | include/net/can.h | 28 |
4 files changed, 43 insertions, 27 deletions
diff --git a/include/linux/can/core.h b/include/linux/can/core.h index 5fb8d0e3f9c1..3287232e3cad 100644 --- a/include/linux/can/core.h +++ b/include/linux/can/core.h @@ -58,6 +58,7 @@ extern void can_rx_unregister(struct net *net, struct net_device *dev, void *data); extern int can_send(struct sk_buff *skb, int loop); +void can_set_skb_uid(struct sk_buff *skb); void can_sock_destruct(struct sock *sk); #endif /* !_CAN_CORE_H */ diff --git a/include/linux/can/skb.h b/include/linux/can/skb.h index 1abc25a8d144..a70a02967071 100644 --- a/include/linux/can/skb.h +++ b/include/linux/can/skb.h @@ -14,6 +14,7 @@ #include <linux/types.h> #include <linux/skbuff.h> #include <linux/can.h> +#include <net/can.h> #include <net/sock.h> void can_flush_echo_skb(struct net_device *dev); @@ -37,37 +38,20 @@ struct sk_buff *alloc_can_err_skb(struct net_device *dev, struct can_frame **cf); bool can_dropped_invalid_skb(struct net_device *dev, struct sk_buff *skb); -/* - * The struct can_skb_priv is used to transport additional information along - * with the stored struct can(fd)_frame that can not be contained in existing - * struct sk_buff elements. - * N.B. that this information must not be modified in cloned CAN sk_buffs. - * To modify the CAN frame content or the struct can_skb_priv content - * skb_copy() needs to be used instead of skb_clone(). - */ - -/** - * struct can_skb_priv - private additional data inside CAN sk_buffs - * @ifindex: ifindex of the first interface the CAN frame appeared on - * @skbcnt: atomic counter to have an unique id together with skb pointer - * @frame_len: length of CAN frame in data link layer - * @cf: align to the following CAN frame at skb->data - */ -struct can_skb_priv { - int ifindex; - int skbcnt; - unsigned int frame_len; - struct can_frame cf[]; -}; - -static inline struct can_skb_priv *can_skb_prv(struct sk_buff *skb) +static inline struct can_skb_ext *can_skb_ext_add(struct sk_buff *skb) { - return (struct can_skb_priv *)(skb->head); + struct can_skb_ext *csx = skb_ext_add(skb, SKB_EXT_CAN); + + /* skb_ext_add() returns uninitialized space */ + if (csx) + csx->can_gw_hops = 0; + + return csx; } -static inline void can_skb_reserve(struct sk_buff *skb) +static inline struct can_skb_ext *can_skb_ext_find(struct sk_buff *skb) { - skb_reserve(skb, sizeof(struct can_skb_priv)); + return skb_ext_find(skb, SKB_EXT_CAN); } static inline void can_skb_set_owner(struct sk_buff *skb, struct sock *sk) diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 8b399ddf1b9b..ef56dc6318d3 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -4990,6 +4990,9 @@ enum skb_ext_id { #if IS_ENABLED(CONFIG_INET_PSP) SKB_EXT_PSP, #endif +#if IS_ENABLED(CONFIG_CAN) + SKB_EXT_CAN, +#endif SKB_EXT_NUM, /* must be last */ }; diff --git a/include/net/can.h b/include/net/can.h new file mode 100644 index 000000000000..6db9e826f0e0 --- /dev/null +++ b/include/net/can.h @@ -0,0 +1,28 @@ +/* SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause) */ +/* + * net/can.h + * + * Definitions for the CAN network socket buffer extensions + * + * Copyright (C) 2026 Oliver Hartkopp <socketcan@hartkopp.net> + * + */ + +#ifndef _NET_CAN_H +#define _NET_CAN_H + +/** + * struct can_skb_ext - skb extensions for CAN specific content + * @can_iif: ifindex of the first interface the CAN frame appeared on + * @can_framelen: cached echo CAN frame length for bql + * @can_gw_hops: can-gw CAN frame time-to-live counter + * @can_ext_flags: CAN skb extensions flags + */ +struct can_skb_ext { + int can_iif; + u16 can_framelen; + u8 can_gw_hops; + u8 can_ext_flags; +}; + +#endif /* _NET_CAN_H */ |