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mac80211: backport support for the IEEE80211_KEY_FLAG_GENERATE_MMIE flag

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Required for an upcoming mt76 update

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2019-08-21 13:11:13 +02:00
parent a0637718d5
commit 0441edfb7f
1 changed files with 58 additions and 0 deletions
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58
package/kernel/mac80211/patches/subsys/314-mac80211-add-IEEE80211_KEY_FLAG_GENERATE_MMIE-to-iee.patch Normal file
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@ -0,0 +1,58 @@
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Tue, 16 Jul 2019 00:09:19 +0200
Subject: [PATCH] mac80211: add IEEE80211_KEY_FLAG_GENERATE_MMIE to
ieee80211_key_flags
Add IEEE80211_KEY_FLAG_GENERATE_MMIE flag to ieee80211_key_flags in order
to allow the driver to notify mac80211 to generate MMIE and that it
requires sequence number generation only.
This is a preliminary patch to add BIP_CMAC_128 hw support to mt7615
driver
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/dfe275f9aa0f1cc6b33085f9efd5d8447f68ad13.1563228405.git.lorenzo@kernel.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
---
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -1702,6 +1702,9 @@ struct wireless_dev *ieee80211_vif_to_wd
* a TKIP key if it only requires MIC space. Do not set together with
* @IEEE80211_KEY_FLAG_GENERATE_MMIC on the same key.
* @IEEE80211_KEY_FLAG_NO_AUTO_TX: Key needs explicit Tx activation.
+ * @IEEE80211_KEY_FLAG_GENERATE_MMIE: This flag should be set by the driver
+ * for a AES_CMAC key to indicate that it requires sequence number
+ * generation only
*/
enum ieee80211_key_flags {
IEEE80211_KEY_FLAG_GENERATE_IV_MGMT = BIT(0),
@@ -1714,6 +1717,7 @@ enum ieee80211_key_flags {
IEEE80211_KEY_FLAG_RESERVE_TAILROOM = BIT(7),
IEEE80211_KEY_FLAG_PUT_MIC_SPACE = BIT(8),
IEEE80211_KEY_FLAG_NO_AUTO_TX = BIT(9),
+ IEEE80211_KEY_FLAG_GENERATE_MMIE = BIT(10),
};
/**
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -947,7 +947,8 @@ ieee80211_crypto_aes_cmac_encrypt(struct
info = IEEE80211_SKB_CB(skb);
- if (info->control.hw_key)
+ if (info->control.hw_key &&
+ !(key->conf.flags & IEEE80211_KEY_FLAG_GENERATE_MMIE))
return TX_CONTINUE;
if (WARN_ON(skb_tailroom(skb) < sizeof(*mmie)))
@@ -963,6 +964,9 @@ ieee80211_crypto_aes_cmac_encrypt(struct
bip_ipn_set64(mmie->sequence_number, pn64);
+ if (info->control.hw_key)
+ return TX_CONTINUE;
+
bip_aad(skb, aad);
/*