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ethtool: wire up get policies to ops

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Wire up policies for get commands in struct nla_policy of the ethtool
family. Make use of genetlink code attr validation and parsing, as well
as allow dumping policies to user space.

For every ETHTOOL_MSG_*_GET:
 - add 'ethnl_' prefix to policy name
 - add extern declaration in net/ethtool/netlink.h
 - wire up the policy & attr in ethtool_genl_ops[].
 - remove .request_policy and .max_attr from ethnl_request_ops.

Obviously core only records the first "layer" of parsed attrs
so we still need to parse the sub-attrs of the nested header
attribute.

v2:
 - merge of patches 1 and 2 from v1
 - remove stray empty lines in ops
 - also remove .max_attr

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski
2020-10-05 15:07:33 -07:00
committed by David S. Miller
parent 02da0b615b
commit 4f30974feb
17 changed files with 90 additions and 107 deletions
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20
net/ethtool/netlink.h
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@@ -266,10 +266,8 @@ static inline void ethnl_ops_complete(struct net_device *dev)
* @request_cmd: command id for request (GET)
* @reply_cmd: command id for reply (GET_REPLY)
* @hdr_attr: attribute type for request header
* @max_attr: maximum (top level) attribute type
* @req_info_size: size of request info
* @reply_data_size: size of reply data
* @request_policy: netlink policy for message contents
* @allow_nodev_do: allow non-dump request with no device identification
* @parse_request:
* Parse request except common header (struct ethnl_req_info). Common
@@ -312,10 +310,8 @@ struct ethnl_request_ops {
u8 request_cmd;
u8 reply_cmd;
u16 hdr_attr;
unsigned int max_attr;
unsigned int req_info_size;
unsigned int reply_data_size;
const struct nla_policy *request_policy;
bool allow_nodev_do;
int (*parse_request)(struct ethnl_req_info *req_info,
@@ -349,6 +345,22 @@ extern const struct ethnl_request_ops ethnl_pause_request_ops;
extern const struct ethnl_request_ops ethnl_eee_request_ops;
extern const struct ethnl_request_ops ethnl_tsinfo_request_ops;
extern const struct nla_policy ethnl_strset_get_policy[ETHTOOL_A_STRSET_MAX + 1];
extern const struct nla_policy ethnl_linkinfo_get_policy[ETHTOOL_A_LINKINFO_MAX + 1];
extern const struct nla_policy ethnl_linkmodes_get_policy[ETHTOOL_A_LINKMODES_MAX + 1];
extern const struct nla_policy ethnl_linkstate_get_policy[ETHTOOL_A_LINKSTATE_MAX + 1];
extern const struct nla_policy ethnl_debug_get_policy[ETHTOOL_A_DEBUG_MAX + 1];
extern const struct nla_policy ethnl_wol_get_policy[ETHTOOL_A_WOL_MAX + 1];
extern const struct nla_policy ethnl_features_get_policy[ETHTOOL_A_FEATURES_MAX + 1];
extern const struct nla_policy ethnl_privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1];
extern const struct nla_policy ethnl_rings_get_policy[ETHTOOL_A_RINGS_MAX + 1];
extern const struct nla_policy ethnl_channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1];
extern const struct nla_policy ethnl_coalesce_get_policy[ETHTOOL_A_COALESCE_MAX + 1];
extern const struct nla_policy ethnl_pause_get_policy[ETHTOOL_A_PAUSE_MAX + 1];
extern const struct nla_policy ethnl_eee_get_policy[ETHTOOL_A_EEE_MAX + 1];
extern const struct nla_policy ethnl_tsinfo_get_policy[ETHTOOL_A_TSINFO_MAX + 1];
extern const struct nla_policy ethnl_tunnel_info_get_policy[ETHTOOL_A_TUNNEL_INFO_MAX + 1];
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info);