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#ifndef __BACKPORT_NET_GENETLINK_H
#define __BACKPORT_NET_GENETLINK_H
#include_next <net/genetlink.h>
#include <linux/version.h>
static inline void __bp_genl_info_userhdr_set(struct genl_info *info,
void *userhdr)
{
info->userhdr = userhdr;
}
static inline void *__bp_genl_info_userhdr(struct genl_info *info)
{
return info->userhdr;
}
#if LINUX_VERSION_IS_LESS(4,12,0)
#define GENL_SET_ERR_MSG(info, msg) NL_SET_ERR_MSG(genl_info_extack(info), msg)
static inline int genl_err_attr(struct genl_info *info, int err,
struct nlattr *attr)
{
return err;
}
#endif /* < 4.12 */
/* this is for patches we apply */
static inline struct netlink_ext_ack *genl_info_extack(struct genl_info *info)
{
#if LINUX_VERSION_IS_GEQ(4,12,0)
return info->extack;
#else
return info->userhdr;
#endif
}
/* this is for patches we apply */
static inline struct netlink_ext_ack *genl_callback_extack(struct netlink_callback *cb)
{
#if LINUX_VERSION_IS_GEQ(4,20,0)
return cb->extack;
#else
return NULL;
#endif
}
/* this gets put in place of info->userhdr, since we use that above */
static inline void *genl_info_userhdr(struct genl_info *info)
{
return (u8 *)info->genlhdr + GENL_HDRLEN;
}
/* this is for patches we apply */
#if LINUX_VERSION_IS_LESS(3,7,0)
#define genl_info_snd_portid(__genl_info) (__genl_info->snd_pid)
#else
#define genl_info_snd_portid(__genl_info) (__genl_info->snd_portid)
#endif
#if LINUX_VERSION_IS_LESS(3,13,0)
#define __genl_const
#else /* < 3.13 */
#define __genl_const const
#endif /* < 3.13 */
#ifndef GENLMSG_DEFAULT_SIZE
#define GENLMSG_DEFAULT_SIZE (NLMSG_DEFAULT_SIZE - GENL_HDRLEN)
#endif
#if LINUX_VERSION_IS_LESS(3,1,0)
#define genl_dump_check_consistent(cb, user_hdr) do { } while (0)
#endif
#if LINUX_VERSION_IS_LESS(4,10,0)
#define __genl_ro_after_init
#else
#define __genl_ro_after_init __ro_after_init
#endif
#if LINUX_VERSION_IS_LESS(4,15,0)
#define genlmsg_nlhdr LINUX_BACKPORT(genlmsg_nlhdr)
static inline struct nlmsghdr *genlmsg_nlhdr(void *user_hdr)
{
return (struct nlmsghdr *)((char *)user_hdr -
GENL_HDRLEN -
NLMSG_HDRLEN);
}
#ifndef genl_dump_check_consistent
static inline
void backport_genl_dump_check_consistent(struct netlink_callback *cb,
void *user_hdr)
{
struct genl_family dummy_family = {
.hdrsize = 0,
};
genl_dump_check_consistent(cb, user_hdr, &dummy_family);
}
#define genl_dump_check_consistent LINUX_BACKPORT(genl_dump_check_consistent)
#endif
#endif /* LINUX_VERSION_IS_LESS(4,15,0) */
#if LINUX_VERSION_IS_LESS(5,2,0)
enum genl_validate_flags {
GENL_DONT_VALIDATE_STRICT = BIT(0),
GENL_DONT_VALIDATE_DUMP = BIT(1),
GENL_DONT_VALIDATE_DUMP_STRICT = BIT(2),
};
#if LINUX_VERSION_IS_GEQ(3,13,0)
struct backport_genl_ops {
void *__dummy_was_policy_must_be_null;
int (*doit)(struct sk_buff *skb,
struct genl_info *info);
#if LINUX_VERSION_IS_GEQ(4,5,0) || \
LINUX_VERSION_IN_RANGE(4,4,104, 4,5,0) || \
LINUX_VERSION_IN_RANGE(4,1,48, 4,2,0) || \
LINUX_VERSION_IN_RANGE(3,18,86, 3,19,0)
int (*start)(struct netlink_callback *cb);
#endif
int (*dumpit)(struct sk_buff *skb,
struct netlink_callback *cb);
int (*done)(struct netlink_callback *cb);
u8 cmd;
u8 internal_flags;
u8 flags;
u8 validate;
};
#else
struct backport_genl_ops {
u8 cmd;
u8 internal_flags;
unsigned int flags;
void *__dummy_was_policy_must_be_null;
int (*doit)(struct sk_buff *skb,
struct genl_info *info);
int (*dumpit)(struct sk_buff *skb,
struct netlink_callback *cb);
int (*done)(struct netlink_callback *cb);
struct list_head ops_list;
u8 validate;
};
#endif
static inline int
__real_backport_genl_register_family(struct genl_family *family)
{
#define OPS_VALIDATE(f) \
BUILD_BUG_ON(offsetof(struct genl_ops, f) != \
offsetof(struct backport_genl_ops, f))
OPS_VALIDATE(doit);
#if LINUX_VERSION_IS_GEQ(4,5,0) || \
LINUX_VERSION_IN_RANGE(4,4,104, 4,5,0) || \
LINUX_VERSION_IN_RANGE(4,1,48, 4,2,0) || \
LINUX_VERSION_IN_RANGE(3,18,86, 3,19,0)
OPS_VALIDATE(start);
#endif
OPS_VALIDATE(dumpit);
OPS_VALIDATE(done);
OPS_VALIDATE(cmd);
OPS_VALIDATE(internal_flags);
OPS_VALIDATE(flags);
return genl_register_family(family);
}
#define genl_ops backport_genl_ops
static inline int
__real_backport_genl_unregister_family(struct genl_family *family)
{
return genl_unregister_family(family);
}
struct backport_genl_family {
struct genl_family family;
const struct genl_ops * copy_ops;
/* copied */
int id; /* private */
unsigned int hdrsize;
char name[GENL_NAMSIZ];
unsigned int version;
unsigned int maxattr;
bool netnsok;
bool parallel_ops;
const struct nla_policy *policy;
int (*pre_doit)(__genl_const struct genl_ops *ops,
struct sk_buff *skb,
struct genl_info *info);
void (*post_doit)(__genl_const struct genl_ops *ops,
struct sk_buff *skb,
struct genl_info *info);
/*
* unsupported!
int (*mcast_bind)(struct net *net, int group);
void (*mcast_unbind)(struct net *net, int group);
*/
struct nlattr ** attrbuf; /* private */
__genl_const struct genl_ops * ops;
__genl_const struct genl_multicast_group *mcgrps;
unsigned int n_ops;
unsigned int n_mcgrps;
struct module *module;
};
#undef genl_family
#define genl_family backport_genl_family
#define genl_register_family backport_genl_register_family
int genl_register_family(struct genl_family *family);
#define genl_unregister_family backport_genl_unregister_family
int backport_genl_unregister_family(struct genl_family *family);
#define genl_notify LINUX_BACKPORT(genl_notify)
void genl_notify(const struct genl_family *family, struct sk_buff *skb,
struct genl_info *info, u32 group, gfp_t flags);
#define genlmsg_put LINUX_BACKPORT(genlmsg_put)
void *genlmsg_put(struct sk_buff *skb, u32 portid, u32 seq,
const struct genl_family *family, int flags, u8 cmd);
#define genlmsg_put_reply LINUX_BACKPORT(genlmsg_put_reply)
void *genlmsg_put_reply(struct sk_buff *skb,
struct genl_info *info,
const struct genl_family *family,
int flags, u8 cmd);
#define genlmsg_multicast_netns LINUX_BACKPORT(genlmsg_multicast_netns)
int genlmsg_multicast_netns(const struct genl_family *family,
struct net *net, struct sk_buff *skb,
u32 portid, unsigned int group,
gfp_t flags);
#define genlmsg_multicast LINUX_BACKPORT(genlmsg_multicast)
int genlmsg_multicast(const struct genl_family *family,
struct sk_buff *skb, u32 portid,
unsigned int group, gfp_t flags);
#define genlmsg_multicast_allns LINUX_BACKPORT(genlmsg_multicast_allns)
int backport_genlmsg_multicast_allns(const struct genl_family *family,
struct sk_buff *skb, u32 portid,
unsigned int group, gfp_t flags);
#define genl_family_attrbuf LINUX_BACKPORT(genl_family_attrbuf)
static inline struct nlattr **genl_family_attrbuf(struct genl_family *family)
{
WARN_ON(family->parallel_ops);
return family->attrbuf;
}
#endif /* LINUX_VERSION_IS_LESS(4,20,0) */
#endif /* __BACKPORT_NET_GENETLINK_H */
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