cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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nfnetlink.h (2895B)

      1/* SPDX-License-Identifier: GPL-2.0 */
      2#ifndef _NFNETLINK_H
      3#define _NFNETLINK_H
      4
      5#include <linux/netlink.h>
      6#include <linux/capability.h>
      7#include <net/netlink.h>
      8#include <uapi/linux/netfilter/nfnetlink.h>
      9
     10struct nfnl_info {
     11	struct net		*net;
     12	struct sock		*sk;
     13	const struct nlmsghdr	*nlh;
     14	const struct nfgenmsg	*nfmsg;
     15	struct netlink_ext_ack	*extack;
     16};
     17
     18enum nfnl_callback_type {
     19	NFNL_CB_UNSPEC	= 0,
     20	NFNL_CB_MUTEX,
     21	NFNL_CB_RCU,
     22	NFNL_CB_BATCH,
     23};
     24
     25struct nfnl_callback {
     26	int (*call)(struct sk_buff *skb, const struct nfnl_info *info,
     27		    const struct nlattr * const cda[]);
     28	const struct nla_policy	*policy;
     29	enum nfnl_callback_type	type;
     30	__u16			attr_count;
     31};
     32
     33enum nfnl_abort_action {
     34	NFNL_ABORT_NONE		= 0,
     35	NFNL_ABORT_AUTOLOAD,
     36	NFNL_ABORT_VALIDATE,
     37};
     38
     39struct nfnetlink_subsystem {
     40	const char *name;
     41	__u8 subsys_id;			/* nfnetlink subsystem ID */
     42	__u8 cb_count;			/* number of callbacks */
     43	const struct nfnl_callback *cb;	/* callback for individual types */
     44	struct module *owner;
     45	int (*commit)(struct net *net, struct sk_buff *skb);
     46	int (*abort)(struct net *net, struct sk_buff *skb,
     47		     enum nfnl_abort_action action);
     48	void (*cleanup)(struct net *net);
     49	bool (*valid_genid)(struct net *net, u32 genid);
     50};
     51
     52int nfnetlink_subsys_register(const struct nfnetlink_subsystem *n);
     53int nfnetlink_subsys_unregister(const struct nfnetlink_subsystem *n);
     54
     55int nfnetlink_has_listeners(struct net *net, unsigned int group);
     56int nfnetlink_send(struct sk_buff *skb, struct net *net, u32 portid,
     57		   unsigned int group, int echo, gfp_t flags);
     58int nfnetlink_set_err(struct net *net, u32 portid, u32 group, int error);
     59int nfnetlink_unicast(struct sk_buff *skb, struct net *net, u32 portid);
     60void nfnetlink_broadcast(struct net *net, struct sk_buff *skb, __u32 portid,
     61			 __u32 group, gfp_t allocation);
     62
     63static inline u16 nfnl_msg_type(u8 subsys, u8 msg_type)
     64{
     65	return subsys << 8 | msg_type;
     66}
     67
     68static inline void nfnl_fill_hdr(struct nlmsghdr *nlh, u8 family, u8 version,
     69				 __be16 res_id)
     70{
     71	struct nfgenmsg *nfmsg;
     72
     73	nfmsg = nlmsg_data(nlh);
     74	nfmsg->nfgen_family = family;
     75	nfmsg->version = version;
     76	nfmsg->res_id = res_id;
     77}
     78
     79static inline struct nlmsghdr *nfnl_msg_put(struct sk_buff *skb, u32 portid,
     80					    u32 seq, int type, int flags,
     81					    u8 family, u8 version,
     82					    __be16 res_id)
     83{
     84	struct nlmsghdr *nlh;
     85
     86	nlh = nlmsg_put(skb, portid, seq, type, sizeof(struct nfgenmsg), flags);
     87	if (!nlh)
     88		return NULL;
     89
     90	nfnl_fill_hdr(nlh, family, version, res_id);
     91
     92	return nlh;
     93}
     94
     95void nfnl_lock(__u8 subsys_id);
     96void nfnl_unlock(__u8 subsys_id);
     97#ifdef CONFIG_PROVE_LOCKING
     98bool lockdep_nfnl_is_held(__u8 subsys_id);
     99#else
    100static inline bool lockdep_nfnl_is_held(__u8 subsys_id)
    101{
    102	return true;
    103}
    104#endif /* CONFIG_PROVE_LOCKING */
    105
    106#define MODULE_ALIAS_NFNL_SUBSYS(subsys) \
    107	MODULE_ALIAS("nfnetlink-subsys-" __stringify(subsys))
    108
    109#endif	/* _NFNETLINK_H */