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mac80211_hwsim: add hwsim_tx_rate_flags to netlink attributes

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For correct interpretation of a tx rate, the corresponding rate flags are
needed (e.g. whether a HT-MCS rate or a legacy rate) and moreover for more
correct simulation the other infos of the flags are important (like
short-GI). Keeping compatibility, the flags are not integrated into the
existing hwsim_tx_rate, but transmitted as an additional netlink attribute.

Signed-off-by: Benjamin Beichler <benjamin.beichler@uni-rostock.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Beichler 2018-01-10 17:42:55 +01:00 committed by Johannes Berg
parent c6509cc3b3
commit 6e3d6ca163
2 changed files with 107 additions and 2 deletions
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41
drivers/net/wireless/mac80211_hwsim.c
View file

@ -1018,6 +1018,36 @@ static int hwsim_unicast_netgroup(struct mac80211_hwsim_data *data,
return res;
}
static inline u16 trans_tx_rate_flags_ieee2hwsim(struct ieee80211_tx_rate *rate)
{
u16 result = 0;
if (rate->flags & IEEE80211_TX_RC_USE_RTS_CTS)
result |= MAC80211_HWSIM_TX_RC_USE_RTS_CTS;
if (rate->flags & IEEE80211_TX_RC_USE_CTS_PROTECT)
result |= MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT;
if (rate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE)
result |= MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE;
if (rate->flags & IEEE80211_TX_RC_MCS)
result |= MAC80211_HWSIM_TX_RC_MCS;
if (rate->flags & IEEE80211_TX_RC_GREEN_FIELD)
result |= MAC80211_HWSIM_TX_RC_GREEN_FIELD;
if (rate->flags & IEEE80211_TX_RC_40_MHZ_WIDTH)
result |= MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH;
if (rate->flags & IEEE80211_TX_RC_DUP_DATA)
result |= MAC80211_HWSIM_TX_RC_DUP_DATA;
if (rate->flags & IEEE80211_TX_RC_SHORT_GI)
result |= MAC80211_HWSIM_TX_RC_SHORT_GI;
if (rate->flags & IEEE80211_TX_RC_VHT_MCS)
result |= MAC80211_HWSIM_TX_RC_VHT_MCS;
if (rate->flags & IEEE80211_TX_RC_80_MHZ_WIDTH)
result |= MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH;
if (rate->flags & IEEE80211_TX_RC_160_MHZ_WIDTH)
result |= MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH;
return result;
}
static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
struct sk_buff *my_skb,
int dst_portid)
@ -1030,6 +1060,7 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
unsigned int hwsim_flags = 0;
int i;
struct hwsim_tx_rate tx_attempts[IEEE80211_TX_MAX_RATES];
struct hwsim_tx_rate_flag tx_attempts_flags[IEEE80211_TX_MAX_RATES];
uintptr_t cookie;
if (data->ps != PS_DISABLED)
@ -1081,7 +1112,11 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
tx_attempts[i].idx = info->status.rates[i].idx;
tx_attempts_flags[i].idx = info->status.rates[i].idx;
tx_attempts[i].count = info->status.rates[i].count;
tx_attempts_flags[i].flags =
trans_tx_rate_flags_ieee2hwsim(
&info->status.rates[i]);
}
if (nla_put(skb, HWSIM_ATTR_TX_INFO,
@ -1089,6 +1124,11 @@ static void mac80211_hwsim_tx_frame_nl(struct ieee80211_hw *hw,
tx_attempts))
goto nla_put_failure;
if (nla_put(skb, HWSIM_ATTR_TX_INFO_FLAGS,
sizeof(struct hwsim_tx_rate_flag) * IEEE80211_TX_MAX_RATES,
tx_attempts_flags))
goto nla_put_failure;
/* We create a cookie to identify this skb */
data->pending_cookie++;
cookie = data->pending_cookie;
@ -2983,7 +3023,6 @@ static int hwsim_tx_info_frame_received_nl(struct sk_buff *skb_2,
for (i = 0; i < IEEE80211_TX_MAX_RATES; i++) {
txi->status.rates[i].idx = tx_attempts[i].idx;
txi->status.rates[i].count = tx_attempts[i].count;
/*txi->status.rates[i].flags = 0;*/
}
txi->status.ack_signal = nla_get_u32(info->attrs[HWSIM_ATTR_SIGNAL]);

68
drivers/net/wireless/mac80211_hwsim.h
View file

@ -64,7 +64,8 @@ enum hwsim_tx_control_flags {
* @HWSIM_CMD_TX_INFO_FRAME: Transmission info report from user space to
* kernel, uses:
* %HWSIM_ATTR_ADDR_TRANSMITTER, %HWSIM_ATTR_FLAGS,
* %HWSIM_ATTR_TX_INFO, %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE
* %HWSIM_ATTR_TX_INFO, %WSIM_ATTR_TX_INFO_FLAGS,
* %HWSIM_ATTR_SIGNAL, %HWSIM_ATTR_COOKIE
* @HWSIM_CMD_NEW_RADIO: create a new radio with the given parameters,
* returns the radio ID (>= 0) or negative on errors, if successful
* then multicast the result
@ -123,6 +124,8 @@ enum {
* @HWSIM_ATTR_RADIO_NAME: Name of radio, e.g. phy666
* @HWSIM_ATTR_NO_VIF: Do not create vif (wlanX) when creating radio.
* @HWSIM_ATTR_FREQ: Frequency at which packet is transmitted or received.
* @HWSIM_ATTR_TX_INFO_FLAGS: additional flags for corresponding
* rates of %HWSIM_ATTR_TX_INFO
* @__HWSIM_ATTR_MAX: enum limit
*/
@ -149,6 +152,7 @@ enum {
HWSIM_ATTR_NO_VIF,
HWSIM_ATTR_FREQ,
HWSIM_ATTR_PAD,
HWSIM_ATTR_TX_INFO_FLAGS,
__HWSIM_ATTR_MAX,
};
#define HWSIM_ATTR_MAX (__HWSIM_ATTR_MAX - 1)
@ -171,4 +175,66 @@ struct hwsim_tx_rate {
u8 count;
} __packed;
/**
* enum hwsim_tx_rate_flags - per-rate flags set by the rate control algorithm.
* Inspired by structure mac80211_rate_control_flags. New flags may be
* appended, but old flags not deleted, to keep compatibility for
* userspace.
*
* These flags are set by the Rate control algorithm for each rate during tx,
* in the @flags member of struct ieee80211_tx_rate.
*
* @MAC80211_HWSIM_TX_RC_USE_RTS_CTS: Use RTS/CTS exchange for this rate.
* @MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT: CTS-to-self protection is required.
* This is set if the current BSS requires ERP protection.
* @MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE: Use short preamble.
* @MAC80211_HWSIM_TX_RC_MCS: HT rate.
* @MAC80211_HWSIM_TX_RC_VHT_MCS: VHT MCS rate, in this case the idx field is
* split into a higher 4 bits (Nss) and lower 4 bits (MCS number)
* @MAC80211_HWSIM_TX_RC_GREEN_FIELD: Indicates whether this rate should be used
* in Greenfield mode.
* @MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH: Indicates if the Channel Width should be
* 40 MHz.
* @MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH: Indicates 80 MHz transmission
* @MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH: Indicates 160 MHz transmission
* (80+80 isn't supported yet)
* @MAC80211_HWSIM_TX_RC_DUP_DATA: The frame should be transmitted on both of
* the adjacent 20 MHz channels, if the current channel type is
* NL80211_CHAN_HT40MINUS or NL80211_CHAN_HT40PLUS.
* @MAC80211_HWSIM_TX_RC_SHORT_GI: Short Guard interval should be used for this
* rate.
*/
enum hwsim_tx_rate_flags {
MAC80211_HWSIM_TX_RC_USE_RTS_CTS = BIT(0),
MAC80211_HWSIM_TX_RC_USE_CTS_PROTECT = BIT(1),
MAC80211_HWSIM_TX_RC_USE_SHORT_PREAMBLE = BIT(2),
/* rate index is an HT/VHT MCS instead of an index */
MAC80211_HWSIM_TX_RC_MCS = BIT(3),
MAC80211_HWSIM_TX_RC_GREEN_FIELD = BIT(4),
MAC80211_HWSIM_TX_RC_40_MHZ_WIDTH = BIT(5),
MAC80211_HWSIM_TX_RC_DUP_DATA = BIT(6),
MAC80211_HWSIM_TX_RC_SHORT_GI = BIT(7),
MAC80211_HWSIM_TX_RC_VHT_MCS = BIT(8),
MAC80211_HWSIM_TX_RC_80_MHZ_WIDTH = BIT(9),
MAC80211_HWSIM_TX_RC_160_MHZ_WIDTH = BIT(10),
};
/**
* struct hwsim_tx_rate - rate selection/status
*
* @idx: rate index to attempt to send with
* @count: number of tries in this rate before going to the next rate
*
* A value of -1 for @idx indicates an invalid rate and, if used
* in an array of retry rates, that no more rates should be tried.
*
* When used for transmit status reporting, the driver should
* always report the rate and number of retries used.
*
*/
struct hwsim_tx_rate_flag {
s8 idx;
u16 flags;
} __packed;
#endif /* __MAC80211_HWSIM_H */