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nl80211: modify TID-config API

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Make some changes to the TID-config API:
 * use u16 in nl80211 (only, and restrict to using 8 bits for now),
   to avoid issues in the future if we ever want to use higher TIDs.
 * reject empty TIDs mask (via netlink policy)
 * change feature advertising to not use extended feature flags but
   have own mechanism for this, which simplifies the code
 * fix all variable names from 'tid' to 'tids' since it's a mask
 * change to cfg80211_ name prefixes, not ieee80211_
 * fix some minor docs/spelling things.

Change-Id: Ia234d464b3f914cdeab82f540e018855be580dce
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2020-02-24 11:34:25 +01:00
parent 77f576deaa
commit 3710a8a628
5 changed files with 121 additions and 94 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

43
include/net/cfg80211.h
View File

@ -626,36 +626,32 @@ struct cfg80211_chan_def {
struct ieee80211_edmg edmg;
};
enum ieee80211_tid_conf_mask {
IEEE80211_TID_CONF_NOACK = BIT(NL80211_TID_CONFIG_ATTR_NOACK),
};
/**
* struct ieee80211_tid_cfg - TID specific configuration
* struct cfg80211_tid_cfg - TID specific configuration
* @config_override: Flag to notify driver to reset TID configuration
* of the peer.
* @tid: TID number
* @tid_conf_mask: bitmap indicating which parameter changed
* see &enum ieee80211_tid_conf_mask
* @tids: bitmap of TIDs to modify
* @mask: bitmap of attributes indicating which parameter changed,
* similar to &nl80211_tid_config_supp.
* @noack: noack configuration value for the TID
*/
struct ieee80211_tid_cfg {
struct cfg80211_tid_cfg {
bool config_override;
u8 tid;
u32 tid_conf_mask;
u8 tids;
u32 mask;
enum nl80211_tid_config noack;
};
/**
* struct ieee80211_tid_config - TID configuration
* struct cfg80211_tid_config - TID configuration
* @peer: Station's MAC address
* @n_tid_conf: Number of TID specific configurations to be applied
* @tid_conf: Configuration change info
*/
struct ieee80211_tid_config {
struct cfg80211_tid_config {
const u8 *peer;
u32 n_tid_conf;
struct ieee80211_tid_cfg tid_conf[];
struct cfg80211_tid_cfg tid_conf[];
};
/**
@ -3705,8 +3701,8 @@ struct cfg80211_update_owe_info {
* and overrule HWMP path selection algorithm.
* @set_tid_config: TID specific configuration, this can be peer or BSS specific
* This callback may sleep.
* @reset_tid_config: Reset TID specific configuration for the peer.
* This callback may sleep.
* @reset_tid_config: Reset TID specific configuration for the peer, for the
* given TIDs. This callback may sleep.
*/
struct cfg80211_ops {
int (*suspend)(struct wiphy *wiphy, struct cfg80211_wowlan *wow);
@ -4031,9 +4027,9 @@ struct cfg80211_ops {
int (*probe_mesh_link)(struct wiphy *wiphy, struct net_device *dev,
const u8 *buf, size_t len);
int (*set_tid_config)(struct wiphy *wiphy, struct net_device *dev,
struct ieee80211_tid_config *tid_conf);
struct cfg80211_tid_config *tid_conf);
int (*reset_tid_config)(struct wiphy *wiphy, struct net_device *dev,
const u8 *peer, u8 tid);
const u8 *peer, u8 tids);
};
/*
@ -4641,6 +4637,13 @@ struct wiphy_iftype_akm_suites {
* @support_mbssid must be set for this to have any effect.
*
* @pmsr_capa: peer measurement capabilities
*
* @tid_config_support: describes the per-TID config support that the
* device has
* @tid_config_support.vif: bitmap of attributes (configurations)
* supported by the driver for each vif
* @tid_config_support.peer: bitmap of attributes (configurations)
* supported by the driver for each peer
*/
struct wiphy {
/* assign these fields before you register the wiphy */
@ -4772,6 +4775,10 @@ struct wiphy {
const struct cfg80211_pmsr_capabilities *pmsr_capa;
struct {
u64 peer, vif;
} tid_config_support;
char priv[0] __aligned(NETDEV_ALIGN);
};

51
include/uapi/linux/nl80211.h
View File

@ -267,20 +267,22 @@
/**
* DOC: TID configuration
*
* TID configuration support can be advertised by drivers by setting
* @NL80211_EXT_FEATURE_PER_TID_* and/or @NL80211_EXT_FEATURE_PER_STA_* config
* mentioned in &enum nl80211_tid_config_attr.
* Needed configuration parameters are mentioned in
* &enum nl80211_tid_config_attr and it will be passed using
* %NL80211_CMD_SET_TID_CONFIG through %NL80211_ATTR_TID_CONFIG.
* If the configuration needs to be applied for specific peer then MAC address
* of the peer needs to be passed in %NL80211_ATT_MAC, otherwise the
* TID config support can be checked in the %NL80211_ATTR_TID_CONFIG
* attribute given in wiphy capabilities.
*
* The necessary configuration parameters are mentioned in
* &enum nl80211_tid_config_attr and it will be passed to the
* %NL80211_CMD_SET_TID_CONFIG command in %NL80211_ATTR_TID_CONFIG.
*
* If the configuration needs to be applied for specific peer then the MAC
* address of the peer needs to be passed in %NL80211_ATTR_MAC, otherwise the
* configuration will be applied for all the connected peers in the vif except
* the peer which has peer specific configuration for the TID.
* And the peer specific configuration will be overridden if
* %NL80211_TID_CONFIG_ATTR_OVERRIDE flag is set.
* All this configurations are valid only for STA's current connection
* i.e. the configurations will be reset to default when the STA connects back
* any peers that have peer specific configuration for the TID by default; if
* the %NL80211_TID_CONFIG_ATTR_OVERRIDE flag is set, peer specific values
* will be overwritten.
*
* All this configuration is valid only for STA's current connection
* i.e. the configuration will be reset to default when the STA connects back
* after disconnection/roaming, and this configuration will be cleared when
* the interface goes down.
*/
@ -2436,7 +2438,9 @@ enum nl80211_commands {
* advertised for a specific interface type.
*
* @NL80211_ATTR_TID_CONFIG: TID specific configuration in a
* nested attribute with &enum nl80211_tid_config_attr sub-attributes.
* nested attribute with &enum nl80211_tid_config_attr sub-attributes;
* on output (in wiphy attributes) it contains only the feature sub-
* attributes.
*
* @NUM_NL80211_ATTR: total number of nl80211_attrs available
* @NL80211_ATTR_MAX: highest attribute number currently defined
@ -4764,20 +4768,29 @@ enum nl80211_tid_config {
};
/* enum nl80211_tid_config_attr - TID specific configuration.
* @NL80211_TID_CONFIG_ATTR_PAD: pad attribute for 64-bit values
* @NL80211_TID_CONFIG_ATTR_VIF_SUPP: a bitmap (u64) of attributes supported
* for per-vif configuration; doesn't list the ones that are generic
* (%NL80211_TID_CONFIG_ATTR_TIDS, %NL80211_TID_CONFIG_ATTR_OVERRIDE).
* @NL80211_TID_CONFIG_ATTR_PEER_SUPP: same as the previous per-vif one, but
* per peer instead.
* @NL80211_TID_CONFIG_ATTR_OVERRIDE: flag attribue, if no peer
* is selected, if set indicates that the new configuration overrides
* all previous peer configurations, otherwise previous peer specific
* configurations should be left untouched. If peer is selected then
* it will reset particular TID configuration of that peer and it will
* not accept other TID config attributes along with peer.
* @NL80211_TID_CONFIG_ATTR_TIDS: a bitmask value of TIDs(bit 0 to 7)
* Its type is u8.
* @NL80211_TID_CONFIG_ATTR_TIDS: a bitmask value of TIDs (bit 0 to 7)
* Its type is u16.
* @NL80211_TID_CONFIG_ATTR_NOACK: Configure ack policy for the TID.
* specified in %NL80211_TID_CONFIG_ATTR_TID. see %enum nl80211_tid_config.
* Its type is u8.
*/
enum nl80211_tid_config_attr {
__NL80211_TID_CONFIG_ATTR_INVALID,
NL80211_TID_CONFIG_ATTR_PAD,
NL80211_TID_CONFIG_ATTR_VIF_SUPP,
NL80211_TID_CONFIG_ATTR_PEER_SUPP,
NL80211_TID_CONFIG_ATTR_OVERRIDE,
NL80211_TID_CONFIG_ATTR_TIDS,
NL80211_TID_CONFIG_ATTR_NOACK,
@ -5605,10 +5618,6 @@ enum nl80211_feature_flags {
* @NL80211_EXT_FEATURE_AQL: The driver supports the Airtime Queue Limit (AQL)
* feature, which prevents bufferbloat by using the expected transmission
* time to limit the amount of data buffered in the hardware.
* @NL80211_EXT_FEATURE_PER_TID_NOACK_CONFIG: Driver supports per TID NoAck
* policy functionality.
* @NL80211_EXT_FEATURE_PER_STA_NOACK_CONFIG: Driver supports STA specific NoAck
* policy functionality.
*
* @NL80211_EXT_FEATURE_BEACON_PROTECTION: The driver supports Beacon protection
* and can receive key configuration for BIGTK using key indexes 6 and 7.
@ -5661,8 +5670,6 @@ enum nl80211_ext_feature_index {
NL80211_EXT_FEATURE_VLAN_OFFLOAD,
NL80211_EXT_FEATURE_AQL,
NL80211_EXT_FEATURE_BEACON_PROTECTION,
NL80211_EXT_FEATURE_PER_TID_NOACK_CONFIG,
NL80211_EXT_FEATURE_PER_STA_NOACK_CONFIG,
/* add new features before the definition below */
NUM_NL80211_EXT_FEATURES,

99
net/wireless/nl80211.c
View File

@ -330,8 +330,10 @@ he_bss_color_policy[NL80211_HE_BSS_COLOR_ATTR_MAX + 1] = {
static const struct nla_policy
nl80211_tid_config_attr_policy[NL80211_TID_CONFIG_ATTR_MAX + 1] = {
[NL80211_TID_CONFIG_ATTR_VIF_SUPP] = { .type = NLA_U64 },
[NL80211_TID_CONFIG_ATTR_PEER_SUPP] = { .type = NLA_U64 },
[NL80211_TID_CONFIG_ATTR_OVERRIDE] = { .type = NLA_FLAG },
[NL80211_TID_CONFIG_ATTR_TIDS] = { .type = NLA_U8 },
[NL80211_TID_CONFIG_ATTR_TIDS] = NLA_POLICY_RANGE(NLA_U16, 1, 0xff),
[NL80211_TID_CONFIG_ATTR_NOACK] =
NLA_POLICY_MAX(NLA_U8, NL80211_TID_CONFIG_DISABLE),
};
@ -1957,6 +1959,40 @@ nl80211_put_iftype_akm_suites(struct cfg80211_registered_device *rdev,
return 0;
}
static int
nl80211_put_tid_config_support(struct cfg80211_registered_device *rdev,
struct sk_buff *msg)
{
struct nlattr *supp;
if (!rdev->wiphy.tid_config_support.vif &&
!rdev->wiphy.tid_config_support.peer)
return 0;
supp = nla_nest_start(msg, NL80211_ATTR_TID_CONFIG);
if (!supp)
return -ENOSPC;
if (rdev->wiphy.tid_config_support.vif &&
nla_put_u64_64bit(msg, NL80211_TID_CONFIG_ATTR_VIF_SUPP,
rdev->wiphy.tid_config_support.vif,
NL80211_TID_CONFIG_ATTR_PAD))
goto fail;
if (rdev->wiphy.tid_config_support.peer &&
nla_put_u64_64bit(msg, NL80211_TID_CONFIG_ATTR_PEER_SUPP,
rdev->wiphy.tid_config_support.peer,
NL80211_TID_CONFIG_ATTR_PAD))
goto fail;
nla_nest_end(msg, supp);
return 0;
fail:
nla_nest_cancel(msg, supp);
return -ENOBUFS;
}
struct nl80211_dump_wiphy_state {
s64 filter_wiphy;
long start;
@ -2518,6 +2554,9 @@ static int nl80211_send_wiphy(struct cfg80211_registered_device *rdev,
if (nl80211_put_iftype_akm_suites(rdev, msg))
goto nla_put_failure;
if (nl80211_put_tid_config_support(rdev, msg))
goto nla_put_failure;
/* done */
state->split_start = 0;
break;
@ -13944,44 +13983,13 @@ static int nl80211_probe_mesh_link(struct sk_buff *skb, struct genl_info *info)
return rdev_probe_mesh_link(rdev, dev, dest, buf, len);
}
static int
__nl80211_check_tid_conf_support(struct cfg80211_registered_device *rdev,
struct netlink_ext_ack *extack,
const u8 *peer, struct nlattr *attrs[],
struct ieee80211_tid_cfg *tid_conf,
enum nl80211_tid_config_attr attr,
enum nl80211_ext_feature_index per_tid_config,
enum nl80211_ext_feature_index per_sta_config)
{
if (!wiphy_ext_feature_isset(&rdev->wiphy, per_tid_config)) {
NL_SET_ERR_MSG_ATTR(extack, attrs[attr],
"TID specific configuration not supported");
return -ENOTSUPP;
}
if (peer && !wiphy_ext_feature_isset(&rdev->wiphy, per_sta_config)) {
NL_SET_ERR_MSG_ATTR(extack, attrs[attr],
"peer specific TID configuration not supported");
return -ENOTSUPP;
}
tid_conf->tid_conf_mask |= BIT(attr);
return 0;
}
#define nl80211_check_tid_config_support(rdev, extack, peer, attrs, tid_conf, \
conf) \
__nl80211_check_tid_conf_support(rdev, extack, peer, attrs, tid_conf, \
NL80211_TID_CONFIG_ATTR_##conf, \
NL80211_EXT_FEATURE_PER_TID_##conf##_CONFIG, \
NL80211_EXT_FEATURE_PER_STA_##conf##_CONFIG)
static int parse_tid_conf(struct cfg80211_registered_device *rdev,
struct nlattr *attrs[], struct net_device *dev,
struct ieee80211_tid_cfg *tid_conf,
struct cfg80211_tid_cfg *tid_conf,
struct genl_info *info, const u8 *peer)
{
struct netlink_ext_ack *extack = info->extack;
u64 mask;
int err;
if (!attrs[NL80211_TID_CONFIG_ATTR_TIDS])
@ -13989,12 +13997,12 @@ static int parse_tid_conf(struct cfg80211_registered_device *rdev,
tid_conf->config_override =
nla_get_flag(attrs[NL80211_TID_CONFIG_ATTR_OVERRIDE]);
tid_conf->tid = nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_TIDS]);
tid_conf->tids = nla_get_u16(attrs[NL80211_TID_CONFIG_ATTR_TIDS]);
if (tid_conf->config_override) {
if (rdev->ops->reset_tid_config) {
err = rdev_reset_tid_config(rdev, dev, peer,
tid_conf->tid);
tid_conf->tids);
/* If peer is there no other configuration will be
* allowed
*/
@ -14006,16 +14014,21 @@ static int parse_tid_conf(struct cfg80211_registered_device *rdev,
}
if (attrs[NL80211_TID_CONFIG_ATTR_NOACK]) {
err = nl80211_check_tid_config_support(rdev, extack, peer,
attrs, tid_conf,
NOACK);
if (err)
return err;
tid_conf->mask |= BIT(NL80211_TID_CONFIG_ATTR_NOACK);
tid_conf->noack =
nla_get_u8(attrs[NL80211_TID_CONFIG_ATTR_NOACK]);
}
if (peer)
mask = rdev->wiphy.tid_config_support.peer;
else
mask = rdev->wiphy.tid_config_support.vif;
if (tid_conf->mask & ~mask) {
NL_SET_ERR_MSG(extack, "unsupported TID configuration");
return -ENOTSUPP;
}
return 0;
}
@ -14025,7 +14038,7 @@ static int nl80211_set_tid_config(struct sk_buff *skb,
struct cfg80211_registered_device *rdev = info->user_ptr[0];
struct nlattr *attrs[NL80211_TID_CONFIG_ATTR_MAX + 1];
struct net_device *dev = info->user_ptr[1];
struct ieee80211_tid_config *tid_config;
struct cfg80211_tid_config *tid_config;
struct nlattr *tid;
int conf_idx = 0, rem_conf;
int ret = -EINVAL;

8
net/wireless/rdev-ops.h
View File

@ -1328,7 +1328,7 @@ rdev_probe_mesh_link(struct cfg80211_registered_device *rdev,
static inline int rdev_set_tid_config(struct cfg80211_registered_device *rdev,
struct net_device *dev,
struct ieee80211_tid_config *tid_conf)
struct cfg80211_tid_config *tid_conf)
{
int ret;
@ -1340,12 +1340,12 @@ static inline int rdev_set_tid_config(struct cfg80211_registered_device *rdev,
static inline int rdev_reset_tid_config(struct cfg80211_registered_device *rdev,
struct net_device *dev, const u8 *peer,
u8 tid)
u8 tids)
{
int ret;
trace_rdev_reset_tid_config(&rdev->wiphy, dev, peer, tid);
ret = rdev->ops->reset_tid_config(&rdev->wiphy, dev, peer, tid);
trace_rdev_reset_tid_config(&rdev->wiphy, dev, peer, tids);
ret = rdev->ops->reset_tid_config(&rdev->wiphy, dev, peer, tids);
trace_rdev_return_int(&rdev->wiphy, ret);
return ret;
}

14
net/wireless/trace.h
View File

@ -3482,7 +3482,7 @@ TRACE_EVENT(rdev_probe_mesh_link,
TRACE_EVENT(rdev_set_tid_config,
TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
struct ieee80211_tid_config *tid_conf),
struct cfg80211_tid_config *tid_conf),
TP_ARGS(wiphy, netdev, tid_conf),
TP_STRUCT__entry(
WIPHY_ENTRY
@ -3500,22 +3500,22 @@ TRACE_EVENT(rdev_set_tid_config,
TRACE_EVENT(rdev_reset_tid_config,
TP_PROTO(struct wiphy *wiphy, struct net_device *netdev,
const u8 *peer, u8 tid),
TP_ARGS(wiphy, netdev, peer, tid),
const u8 *peer, u8 tids),
TP_ARGS(wiphy, netdev, peer, tids),
TP_STRUCT__entry(
WIPHY_ENTRY
NETDEV_ENTRY
MAC_ENTRY(peer)
__field(u8, tid)
__field(u8, tids)
),
TP_fast_assign(
WIPHY_ASSIGN;
NETDEV_ASSIGN;
MAC_ASSIGN(peer, peer);
__entry->tid = tid;
__entry->tids = tids;
),
TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", peer: " MAC_PR_FMT ", tid: %u",
WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(peer), __entry->tid)
TP_printk(WIPHY_PR_FMT ", " NETDEV_PR_FMT ", peer: " MAC_PR_FMT ", tids: 0x%x",
WIPHY_PR_ARG, NETDEV_PR_ARG, MAC_PR_ARG(peer), __entry->tids)
);
#endif /* !__RDEV_OPS_TRACE || TRACE_HEADER_MULTI_READ */