mirror of https://gitee.com/openkylin/linux.git
362 lines
13 KiB
C
362 lines
13 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
|
|
#ifndef _NET_ETHTOOL_NETLINK_H
|
|
#define _NET_ETHTOOL_NETLINK_H
|
|
|
|
#include <linux/ethtool_netlink.h>
|
|
#include <linux/netdevice.h>
|
|
#include <net/genetlink.h>
|
|
#include <net/sock.h>
|
|
|
|
struct ethnl_req_info;
|
|
|
|
int ethnl_parse_header_dev_get(struct ethnl_req_info *req_info,
|
|
const struct nlattr *nest, struct net *net,
|
|
struct netlink_ext_ack *extack,
|
|
bool require_dev);
|
|
int ethnl_fill_reply_header(struct sk_buff *skb, struct net_device *dev,
|
|
u16 attrtype);
|
|
struct sk_buff *ethnl_reply_init(size_t payload, struct net_device *dev, u8 cmd,
|
|
u16 hdr_attrtype, struct genl_info *info,
|
|
void **ehdrp);
|
|
|
|
/**
|
|
* ethnl_strz_size() - calculate attribute length for fixed size string
|
|
* @s: ETH_GSTRING_LEN sized string (may not be null terminated)
|
|
*
|
|
* Return: total length of an attribute with null terminated string from @s
|
|
*/
|
|
static inline int ethnl_strz_size(const char *s)
|
|
{
|
|
return nla_total_size(strnlen(s, ETH_GSTRING_LEN) + 1);
|
|
}
|
|
|
|
/**
|
|
* ethnl_put_strz() - put string attribute with fixed size string
|
|
* @skb: skb with the message
|
|
* @attrype: attribute type
|
|
* @s: ETH_GSTRING_LEN sized string (may not be null terminated)
|
|
*
|
|
* Puts an attribute with null terminated string from @s into the message.
|
|
*
|
|
* Return: 0 on success, negative error code on failure
|
|
*/
|
|
static inline int ethnl_put_strz(struct sk_buff *skb, u16 attrtype,
|
|
const char *s)
|
|
{
|
|
unsigned int len = strnlen(s, ETH_GSTRING_LEN);
|
|
struct nlattr *attr;
|
|
|
|
attr = nla_reserve(skb, attrtype, len + 1);
|
|
if (!attr)
|
|
return -EMSGSIZE;
|
|
|
|
memcpy(nla_data(attr), s, len);
|
|
((char *)nla_data(attr))[len] = '\0';
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* ethnl_update_u32() - update u32 value from NLA_U32 attribute
|
|
* @dst: value to update
|
|
* @attr: netlink attribute with new value or null
|
|
* @mod: pointer to bool for modification tracking
|
|
*
|
|
* Copy the u32 value from NLA_U32 netlink attribute @attr into variable
|
|
* pointed to by @dst; do nothing if @attr is null. Bool pointed to by @mod
|
|
* is set to true if this function changed the value of *dst, otherwise it
|
|
* is left as is.
|
|
*/
|
|
static inline void ethnl_update_u32(u32 *dst, const struct nlattr *attr,
|
|
bool *mod)
|
|
{
|
|
u32 val;
|
|
|
|
if (!attr)
|
|
return;
|
|
val = nla_get_u32(attr);
|
|
if (*dst == val)
|
|
return;
|
|
|
|
*dst = val;
|
|
*mod = true;
|
|
}
|
|
|
|
/**
|
|
* ethnl_update_u8() - update u8 value from NLA_U8 attribute
|
|
* @dst: value to update
|
|
* @attr: netlink attribute with new value or null
|
|
* @mod: pointer to bool for modification tracking
|
|
*
|
|
* Copy the u8 value from NLA_U8 netlink attribute @attr into variable
|
|
* pointed to by @dst; do nothing if @attr is null. Bool pointed to by @mod
|
|
* is set to true if this function changed the value of *dst, otherwise it
|
|
* is left as is.
|
|
*/
|
|
static inline void ethnl_update_u8(u8 *dst, const struct nlattr *attr,
|
|
bool *mod)
|
|
{
|
|
u8 val;
|
|
|
|
if (!attr)
|
|
return;
|
|
val = nla_get_u8(attr);
|
|
if (*dst == val)
|
|
return;
|
|
|
|
*dst = val;
|
|
*mod = true;
|
|
}
|
|
|
|
/**
|
|
* ethnl_update_bool32() - update u32 used as bool from NLA_U8 attribute
|
|
* @dst: value to update
|
|
* @attr: netlink attribute with new value or null
|
|
* @mod: pointer to bool for modification tracking
|
|
*
|
|
* Use the u8 value from NLA_U8 netlink attribute @attr to set u32 variable
|
|
* pointed to by @dst to 0 (if zero) or 1 (if not); do nothing if @attr is
|
|
* null. Bool pointed to by @mod is set to true if this function changed the
|
|
* logical value of *dst, otherwise it is left as is.
|
|
*/
|
|
static inline void ethnl_update_bool32(u32 *dst, const struct nlattr *attr,
|
|
bool *mod)
|
|
{
|
|
u8 val;
|
|
|
|
if (!attr)
|
|
return;
|
|
val = !!nla_get_u8(attr);
|
|
if (!!*dst == val)
|
|
return;
|
|
|
|
*dst = val;
|
|
*mod = true;
|
|
}
|
|
|
|
/**
|
|
* ethnl_update_binary() - update binary data from NLA_BINARY atribute
|
|
* @dst: value to update
|
|
* @len: destination buffer length
|
|
* @attr: netlink attribute with new value or null
|
|
* @mod: pointer to bool for modification tracking
|
|
*
|
|
* Use the u8 value from NLA_U8 netlink attribute @attr to rewrite data block
|
|
* of length @len at @dst by attribute payload; do nothing if @attr is null.
|
|
* Bool pointed to by @mod is set to true if this function changed the logical
|
|
* value of *dst, otherwise it is left as is.
|
|
*/
|
|
static inline void ethnl_update_binary(void *dst, unsigned int len,
|
|
const struct nlattr *attr, bool *mod)
|
|
{
|
|
if (!attr)
|
|
return;
|
|
if (nla_len(attr) < len)
|
|
len = nla_len(attr);
|
|
if (!memcmp(dst, nla_data(attr), len))
|
|
return;
|
|
|
|
memcpy(dst, nla_data(attr), len);
|
|
*mod = true;
|
|
}
|
|
|
|
/**
|
|
* ethnl_update_bitfield32() - update u32 value from NLA_BITFIELD32 attribute
|
|
* @dst: value to update
|
|
* @attr: netlink attribute with new value or null
|
|
* @mod: pointer to bool for modification tracking
|
|
*
|
|
* Update bits in u32 value which are set in attribute's mask to values from
|
|
* attribute's value. Do nothing if @attr is null or the value wouldn't change;
|
|
* otherwise, set bool pointed to by @mod to true.
|
|
*/
|
|
static inline void ethnl_update_bitfield32(u32 *dst, const struct nlattr *attr,
|
|
bool *mod)
|
|
{
|
|
struct nla_bitfield32 change;
|
|
u32 newval;
|
|
|
|
if (!attr)
|
|
return;
|
|
change = nla_get_bitfield32(attr);
|
|
newval = (*dst & ~change.selector) | (change.value & change.selector);
|
|
if (*dst == newval)
|
|
return;
|
|
|
|
*dst = newval;
|
|
*mod = true;
|
|
}
|
|
|
|
/**
|
|
* ethnl_reply_header_size() - total size of reply header
|
|
*
|
|
* This is an upper estimate so that we do not need to hold RTNL lock longer
|
|
* than necessary (to prevent rename between size estimate and composing the
|
|
* message). Accounts only for device ifindex and name as those are the only
|
|
* attributes ethnl_fill_reply_header() puts into the reply header.
|
|
*/
|
|
static inline unsigned int ethnl_reply_header_size(void)
|
|
{
|
|
return nla_total_size(nla_total_size(sizeof(u32)) +
|
|
nla_total_size(IFNAMSIZ));
|
|
}
|
|
|
|
/* GET request handling */
|
|
|
|
/* Unified processing of GET requests uses two data structures: request info
|
|
* and reply data. Request info holds information parsed from client request
|
|
* and its stays constant through all request processing. Reply data holds data
|
|
* retrieved from ethtool_ops callbacks or other internal sources which is used
|
|
* to compose the reply. When processing a dump request, request info is filled
|
|
* only once (when the request message is parsed) but reply data is filled for
|
|
* each reply message.
|
|
*
|
|
* Both structures consist of part common for all request types (struct
|
|
* ethnl_req_info and struct ethnl_reply_data defined below) and optional
|
|
* parts specific for each request type. Common part always starts at offset 0.
|
|
*/
|
|
|
|
/**
|
|
* struct ethnl_req_info - base type of request information for GET requests
|
|
* @dev: network device the request is for (may be null)
|
|
* @flags: request flags common for all request types
|
|
*
|
|
* This is a common base for request specific structures holding data from
|
|
* parsed userspace request. These always embed struct ethnl_req_info at
|
|
* zero offset.
|
|
*/
|
|
struct ethnl_req_info {
|
|
struct net_device *dev;
|
|
u32 flags;
|
|
};
|
|
|
|
/**
|
|
* struct ethnl_reply_data - base type of reply data for GET requests
|
|
* @dev: device for current reply message; in single shot requests it is
|
|
* equal to ðnl_req_info.dev; in dumps it's different for each
|
|
* reply message
|
|
*
|
|
* This is a common base for request specific structures holding data for
|
|
* kernel reply message. These always embed struct ethnl_reply_data at zero
|
|
* offset.
|
|
*/
|
|
struct ethnl_reply_data {
|
|
struct net_device *dev;
|
|
};
|
|
|
|
static inline int ethnl_ops_begin(struct net_device *dev)
|
|
{
|
|
if (dev && dev->ethtool_ops->begin)
|
|
return dev->ethtool_ops->begin(dev);
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
static inline void ethnl_ops_complete(struct net_device *dev)
|
|
{
|
|
if (dev && dev->ethtool_ops->complete)
|
|
dev->ethtool_ops->complete(dev);
|
|
}
|
|
|
|
/**
|
|
* struct ethnl_request_ops - unified handling of GET requests
|
|
* @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
|
|
* header is already filled on entry, the rest up to @repdata_offset
|
|
* is zero initialized. This callback should only modify type specific
|
|
* request info by parsed attributes from request message.
|
|
* @prepare_data:
|
|
* Retrieve and prepare data needed to compose a reply message. Calls to
|
|
* ethtool_ops handlers are limited to this callback. Common reply data
|
|
* (struct ethnl_reply_data) is filled on entry, type specific part after
|
|
* it is zero initialized. This callback should only modify the type
|
|
* specific part of reply data. Device identification from struct
|
|
* ethnl_reply_data is to be used as for dump requests, it iterates
|
|
* through network devices while dev member of struct ethnl_req_info
|
|
* points to the device from client request.
|
|
* @reply_size:
|
|
* Estimate reply message size. Returned value must be sufficient for
|
|
* message payload without common reply header. The callback may returned
|
|
* estimate higher than actual message size if exact calculation would
|
|
* not be worth the saved memory space.
|
|
* @fill_reply:
|
|
* Fill reply message payload (except for common header) from reply data.
|
|
* The callback must not generate more payload than previously called
|
|
* ->reply_size() estimated.
|
|
* @cleanup_data:
|
|
* Optional cleanup called when reply data is no longer needed. Can be
|
|
* used e.g. to free any additional data structures outside the main
|
|
* structure which were allocated by ->prepare_data(). When processing
|
|
* dump requests, ->cleanup() is called for each message.
|
|
*
|
|
* Description of variable parts of GET request handling when using the
|
|
* unified infrastructure. When used, a pointer to an instance of this
|
|
* structure is to be added to ðnl_default_requests array and generic
|
|
* handlers ethnl_default_doit(), ethnl_default_dumpit(),
|
|
* ethnl_default_start() and ethnl_default_done() used in @ethtool_genl_ops;
|
|
* ethnl_default_notify() can be used in @ethnl_notify_handlers to send
|
|
* notifications of the corresponding type.
|
|
*/
|
|
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,
|
|
struct nlattr **tb,
|
|
struct netlink_ext_ack *extack);
|
|
int (*prepare_data)(const struct ethnl_req_info *req_info,
|
|
struct ethnl_reply_data *reply_data,
|
|
struct genl_info *info);
|
|
int (*reply_size)(const struct ethnl_req_info *req_info,
|
|
const struct ethnl_reply_data *reply_data);
|
|
int (*fill_reply)(struct sk_buff *skb,
|
|
const struct ethnl_req_info *req_info,
|
|
const struct ethnl_reply_data *reply_data);
|
|
void (*cleanup_data)(struct ethnl_reply_data *reply_data);
|
|
};
|
|
|
|
/* request handlers */
|
|
|
|
extern const struct ethnl_request_ops ethnl_strset_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_linkinfo_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_linkmodes_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_linkstate_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_debug_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_wol_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_features_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_privflags_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_rings_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_channels_request_ops;
|
|
extern const struct ethnl_request_ops ethnl_coalesce_request_ops;
|
|
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;
|
|
|
|
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);
|
|
int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info);
|
|
int ethnl_set_features(struct sk_buff *skb, struct genl_info *info);
|
|
int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info);
|
|
int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info);
|
|
int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info);
|
|
int ethnl_set_coalesce(struct sk_buff *skb, struct genl_info *info);
|
|
int ethnl_set_pause(struct sk_buff *skb, struct genl_info *info);
|
|
int ethnl_set_eee(struct sk_buff *skb, struct genl_info *info);
|
|
|
|
#endif /* _NET_ETHTOOL_NETLINK_H */
|