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wifi: cfg80211: Add support for setting TID to link mapping

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Add support for setting the TID to link mapping for a non-AP MLD
station.

This is useful in cases user space needs to restrict the possible
set of active links, e.g., since it got a BSS Transition Management
request forcing to use only a subset of the valid links etc.

Signed-off-by: Ilan Peer <ilan.peer@intel.com>
Reviewed-by: Gregory Greenman <gregory.greenman@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20231211085121.da4d56a5f3ff.Iacf88e943326bf9c169c49b728c4a3445fdedc97@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Ilan Peer 2023-12-11 09:05:22 +02:00 committed by Johannes Berg
parent 9adc8b6521
commit b61e6b41a2
5 changed files with 112 additions and 0 deletions
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18
include/net/cfg80211.h
View file

@ -1673,6 +1673,21 @@ struct link_station_del_parameters {
u32 link_id;
};
/**
* struct cfg80211_ttlm_params: TID to link mapping parameters
*
* Used for setting a TID to link mapping.
*
* @dlink: Downlink TID to link mapping, as defined in section 9.4.2.314
* (TID-To-Link Mapping element) in Draft P802.11be_D4.0.
* @ulink: Uplink TID to link mapping, as defined in section 9.4.2.314
* (TID-To-Link Mapping element) in Draft P802.11be_D4.0.
*/
struct cfg80211_ttlm_params {
u16 dlink[8];
u16 ulink[8];
};
/**
* struct station_parameters - station parameters
*
@ -4523,6 +4538,7 @@ struct mgmt_frame_regs {
* @del_link_station: Remove a link of a station.
*
* @set_hw_timestamp: Enable/disable HW timestamping of TM/FTM frames.
* @set_ttlm: set the TID to link mapping.
*/
struct cfg80211_ops {
int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@ -4882,6 +4898,8 @@ struct cfg80211_ops {
struct link_station_del_parameters *params);
int (*set_hw_timestamp)(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_set_hw_timestamp *hwts);
int (*set_ttlm)(struct wiphy *wiphy, struct net_device *dev,
struct cfg80211_ttlm_params *params);
};
/*

19
include/uapi/linux/nl80211.h
View file

@ -1328,6 +1328,11 @@
* Multi-Link reconfiguration. %NL80211_ATTR_MLO_LINKS is used to provide
* information about the removed STA MLD setup links.
*
* @NL80211_CMD_SET_TID_TO_LINK_MAPPING: Set the TID to Link Mapping for a
* non-AP MLD station. The %NL80211_ATTR_MLO_TTLM_DLINK and
* %NL80211_ATTR_MLO_TTLM_ULINK attributes are used to specify the
* TID to Link mapping for downlink/uplink traffic.
*
* @NL80211_CMD_MAX: highest used command number
* @__NL80211_CMD_AFTER_LAST: internal use
*/
@ -1583,6 +1588,8 @@ enum nl80211_commands {
NL80211_CMD_LINKS_REMOVED,
NL80211_CMD_SET_TID_TO_LINK_MAPPING,
/* add new commands above here */
/* used to define NL80211_CMD_MAX below */
@ -2835,6 +2842,15 @@ enum nl80211_commands {
* include BSSes that can only be used in restricted scenarios and/or
* cannot be used at all.
*
* @NL80211_ATTR_MLO_TTLM_DLINK: Binary attribute specifying the downlink TID to
* link mapping. The length is 8 * sizeof(u16). For each TID the link
* mapping is as defined in section 9.4.2.314 (TID-To-Link Mapping element)
* in Draft P802.11be_D4.0.
* @NL80211_ATTR_MLO_TTLM_ULINK: Binary attribute specifying the uplink TID to
* link mapping. The length is 8 * sizeof(u16). For each TID the link
* mapping is as defined in section 9.4.2.314 (TID-To-Link Mapping element)
* in Draft P802.11be_D4.0.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
* @__NL80211_ATTR_AFTER_LAST: internal use
@ -3375,6 +3391,9 @@ enum nl80211_attrs {
NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA,
NL80211_ATTR_MLO_TTLM_DLINK,
NL80211_ATTR_MLO_TTLM_ULINK,
/* add attributes here, update the policy in nl80211.c */
__NL80211_ATTR_AFTER_LAST,

37
net/wireless/nl80211.c
View file

@ -819,6 +819,8 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = {
[NL80211_ATTR_EMA_RNR_ELEMS] = { .type = NLA_NESTED },
[NL80211_ATTR_MLO_LINK_DISABLED] = { .type = NLA_FLAG },
[NL80211_ATTR_BSS_DUMP_INCLUDE_USE_DATA] = { .type = NLA_FLAG },
[NL80211_ATTR_MLO_TTLM_DLINK] = NLA_POLICY_EXACT_LEN(sizeof(u16) * 8),
[NL80211_ATTR_MLO_TTLM_ULINK] = NLA_POLICY_EXACT_LEN(sizeof(u16) * 8),
};
/* policy for the key attributes */
@ -16298,6 +16300,35 @@ static int nl80211_set_hw_timestamp(struct sk_buff *skb,
return rdev_set_hw_timestamp(rdev, dev, &hwts);
}
static int
nl80211_set_ttlm(struct sk_buff *skb, struct genl_info *info)
{
struct cfg80211_ttlm_params params = {};
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct net_device *dev = info->user_ptr[1];
struct wireless_dev *wdev = dev->ieee80211_ptr;
if (wdev->iftype != NL80211_IFTYPE_STATION &&
wdev->iftype != NL80211_IFTYPE_P2P_CLIENT)
return -EOPNOTSUPP;
if (!wdev->connected)
return -ENOLINK;
if (!info->attrs[NL80211_ATTR_MLO_TTLM_DLINK] ||
!info->attrs[NL80211_ATTR_MLO_TTLM_ULINK])
return -EINVAL;
nla_memcpy(params.dlink,
info->attrs[NL80211_ATTR_MLO_TTLM_DLINK],
sizeof(params.dlink));
nla_memcpy(params.ulink,
info->attrs[NL80211_ATTR_MLO_TTLM_ULINK],
sizeof(params.ulink));
return rdev_set_ttlm(rdev, dev, &params);
}
#define NL80211_FLAG_NEED_WIPHY 0x01
#define NL80211_FLAG_NEED_NETDEV 0x02
#define NL80211_FLAG_NEED_RTNL 0x04
@ -17479,6 +17510,12 @@ static const struct genl_small_ops nl80211_small_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
},
{
.cmd = NL80211_CMD_SET_TID_TO_LINK_MAPPING,
.doit = nl80211_set_ttlm,
.flags = GENL_UNS_ADMIN_PERM,
.internal_flags = IFLAGS(NL80211_FLAG_NEED_NETDEV_UP),
},
};
static struct genl_family nl80211_fam __ro_after_init = {

18
net/wireless/rdev-ops.h
View file

@ -1524,4 +1524,22 @@ rdev_set_hw_timestamp(struct cfg80211_registered_device *rdev,
return ret;
}
static inline int
rdev_set_ttlm(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct cfg80211_ttlm_params *params)
{
struct wiphy *wiphy = &rdev->wiphy;
int ret;
if (!rdev->ops->set_ttlm)
return -EOPNOTSUPP;
trace_rdev_set_ttlm(wiphy, dev, params);
ret = rdev->ops->set_ttlm(wiphy, dev, params);
trace_rdev_return_int(wiphy, ret);
return ret;
}
#endif /* __CFG80211_RDEV_OPS */

20
net/wireless/trace.h
View file

@ -3979,6 +3979,26 @@ TRACE_EVENT(cfg80211_links_removed,
__entry->link_mask)
);
TRACE_EVENT(rdev_set_ttlm,
TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
struct cfg80211_ttlm_params *params),
TP_ARGS(wiphy, netdev, params),
TP_STRUCT__entry(
WIPHY_ENTRY
NETDEV_ENTRY
__array(u8, dlink, sizeof(u16) * 8)
__array(u8, ulink, sizeof(u16) * 8)
),
TP_fast_assign(
WIPHY_ASSIGN;
NETDEV_ASSIGN;
memcpy(__entry->dlink, params->dlink, sizeof(params->dlink));
memcpy(__entry->ulink, params->ulink, sizeof(params->ulink));
),
TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT,
WIPHY_PR_ARG, NETDEV_PR_ARG)
);
#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */
#undef TRACE_INCLUDE_PATH