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| author | Jiri Pirko <jiri@nvidia.com> | 2023-12-16 13:29:57 +0100 |
|---|---|---|
| committer | Paolo Abeni <pabeni@redhat.com> | 2023-12-19 15:31:40 +0100 |
| commit | a731132424adeda4d5383ef61afae2e804063fb7 (patch) | |
| tree | 932e63200b540fe31f2dfcd47bdf4e39943304f2 /include/net | |
| parent | 5648de0b1f2b68bffce9bdd49a276607b9a3e3d4 (diff) | |
| download | linux-stable-a731132424adeda4d5383ef61afae2e804063fb7.tar.gz linux-stable-a731132424adeda4d5383ef61afae2e804063fb7.tar.bz2 linux-stable-a731132424adeda4d5383ef61afae2e804063fb7.zip | |
genetlink: introduce per-sock family private storage
Introduce an xarray for Generic netlink family to store per-socket
private. Initialize this xarray only if family uses per-socket privs.
Introduce genl_sk_priv_get() to get the socket priv pointer for a family
and initialize it in case it does not exist.
Introduce __genl_sk_priv_get() to obtain socket priv pointer for a
family under RCU read lock.
Allow family to specify the priv size, init() and destroy() callbacks.
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Diffstat (limited to 'include/net')
| -rw-r--r-- | include/net/genetlink.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/net/genetlink.h b/include/net/genetlink.h index c53244f20437..6bc37f392a9a 100644 --- a/include/net/genetlink.h +++ b/include/net/genetlink.h @@ -51,6 +51,9 @@ struct genl_info; * @split_ops: the split do/dump form of operation definition * @n_split_ops: number of entries in @split_ops, not that with split do/dump * ops the number of entries is not the same as number of commands + * @sock_priv_size: the size of per-socket private memory + * @sock_priv_init: the per-socket private memory initializer + * @sock_priv_destroy: the per-socket private memory destructor * * Attribute policies (the combination of @policy and @maxattr fields) * can be attached at the family level or at the operation level. @@ -84,11 +87,17 @@ struct genl_family { const struct genl_multicast_group *mcgrps; struct module *module; + size_t sock_priv_size; + void (*sock_priv_init)(void *priv); + void (*sock_priv_destroy)(void *priv); + /* private: internal use only */ /* protocol family identifier */ int id; /* starting number of multicast group IDs in this family */ unsigned int mcgrp_offset; + /* list of per-socket privs */ + struct xarray *sock_privs; }; /** @@ -298,6 +307,8 @@ static inline bool genl_info_is_ntf(const struct genl_info *info) return !info->nlhdr; } +void *__genl_sk_priv_get(struct genl_family *family, struct sock *sk); +void *genl_sk_priv_get(struct genl_family *family, struct sock *sk); int genl_register_family(struct genl_family *family); int genl_unregister_family(const struct genl_family *family); void genl_notify(const struct genl_family *family, struct sk_buff *skb, |