diff options
Diffstat (limited to 'backport-include/net/genetlink.h')
| -rw-r--r-- | backport-include/net/genetlink.h | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/backport-include/net/genetlink.h b/backport-include/net/genetlink.h new file mode 100644 index 0000000..747b6da --- /dev/null +++ b/backport-include/net/genetlink.h @@ -0,0 +1,254 @@ +#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 */ |