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-rw-r--r--include/net/dropreason.h12
-rw-r--r--net/mac80211/drop.h56
-rw-r--r--net/mac80211/ieee80211_i.h8
-rw-r--r--net/mac80211/main.c31
-rw-r--r--net/mac80211/rx.c55
-rw-r--r--net/mac80211/wpa.c24
6 files changed, 138 insertions, 48 deletions
diff --git a/include/net/dropreason.h b/include/net/dropreason.h
index f0f2378dbed0..685fb37df8e8 100644
--- a/include/net/dropreason.h
+++ b/include/net/dropreason.h
@@ -11,6 +11,18 @@ enum skb_drop_reason_subsys {
/** @SKB_DROP_REASON_SUBSYS_CORE: core drop reasons defined above */
SKB_DROP_REASON_SUBSYS_CORE,
+ /**
+ * @SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE: mac80211 drop reasons
+ * for unusable frames, see net/mac80211/drop.h
+ */
+ SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
+
+ /**
+ * @SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR: mac80211 drop reasons
+ * for frames still going to monitor, see net/mac80211/drop.h
+ */
+ SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
+
/** @SKB_DROP_REASON_SUBSYS_NUM: number of subsystems defined */
SKB_DROP_REASON_SUBSYS_NUM
};
diff --git a/net/mac80211/drop.h b/net/mac80211/drop.h
new file mode 100644
index 000000000000..49dc809cab29
--- /dev/null
+++ b/net/mac80211/drop.h
@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * mac80211 drop reason list
+ *
+ * Copyright (C) 2023 Intel Corporation
+ */
+
+#ifndef MAC80211_DROP_H
+#define MAC80211_DROP_H
+#include <net/dropreason.h>
+
+typedef unsigned int __bitwise ieee80211_rx_result;
+
+#define MAC80211_DROP_REASONS_MONITOR(R) \
+ R(RX_DROP_M_UNEXPECTED_4ADDR_FRAME) \
+ R(RX_DROP_M_BAD_BCN_KEYIDX) \
+ R(RX_DROP_M_BAD_MGMT_KEYIDX) \
+/* this line for the trailing \ - add before this */
+
+#define MAC80211_DROP_REASONS_UNUSABLE(R) \
+ R(RX_DROP_U_MIC_FAIL) \
+ R(RX_DROP_U_REPLAY) \
+ R(RX_DROP_U_BAD_MMIE) \
+/* this line for the trailing \ - add before this */
+
+/* having two enums allows for checking ieee80211_rx_result use with sparse */
+enum ___mac80211_drop_reason {
+/* if we get to the end of handlers with RX_CONTINUE this will be the reason */
+ ___RX_CONTINUE = SKB_CONSUMED,
+
+/* this never gets used as an argument to kfree_skb_reason() */
+ ___RX_QUEUED = SKB_NOT_DROPPED_YET,
+
+#define ENUM(x) ___ ## x,
+ ___RX_DROP_MONITOR = SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR <<
+ SKB_DROP_REASON_SUBSYS_SHIFT,
+ MAC80211_DROP_REASONS_MONITOR(ENUM)
+
+ ___RX_DROP_UNUSABLE = SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE <<
+ SKB_DROP_REASON_SUBSYS_SHIFT,
+ MAC80211_DROP_REASONS_UNUSABLE(ENUM)
+#undef ENUM
+};
+
+enum mac80211_drop_reason {
+ RX_CONTINUE = (__force ieee80211_rx_result)___RX_CONTINUE,
+ RX_QUEUED = (__force ieee80211_rx_result)___RX_QUEUED,
+ RX_DROP_MONITOR = (__force ieee80211_rx_result)___RX_DROP_MONITOR,
+ RX_DROP_UNUSABLE = (__force ieee80211_rx_result)___RX_DROP_UNUSABLE,
+#define DEF(x) x = (__force ieee80211_rx_result)___ ## x,
+ MAC80211_DROP_REASONS_MONITOR(DEF)
+ MAC80211_DROP_REASONS_UNUSABLE(DEF)
+#undef DEF
+};
+
+#endif /* MAC80211_DROP_H */
diff --git a/net/mac80211/ieee80211_i.h b/net/mac80211/ieee80211_i.h
index 9b7e184430b8..a0a7839cb961 100644
--- a/net/mac80211/ieee80211_i.h
+++ b/net/mac80211/ieee80211_i.h
@@ -33,6 +33,7 @@
#include "key.h"
#include "sta_info.h"
#include "debug.h"
+#include "drop.h"
extern const struct cfg80211_ops mac80211_config_ops;
@@ -170,13 +171,6 @@ struct ieee80211_tx_data {
unsigned int flags;
};
-
-typedef unsigned __bitwise ieee80211_rx_result;
-#define RX_CONTINUE ((__force ieee80211_rx_result) 0u)
-#define RX_DROP_UNUSABLE ((__force ieee80211_rx_result) 1u)
-#define RX_DROP_MONITOR ((__force ieee80211_rx_result) 2u)
-#define RX_QUEUED ((__force ieee80211_rx_result) 3u)
-
/**
* enum ieee80211_packet_rx_flags - packet RX flags
* @IEEE80211_RX_AMSDU: a-MSDU packet
diff --git a/net/mac80211/main.c b/net/mac80211/main.c
index ddf2b7811c55..55cdfaef0f5d 100644
--- a/net/mac80211/main.c
+++ b/net/mac80211/main.c
@@ -22,6 +22,7 @@
#include <linux/bitmap.h>
#include <linux/inetdevice.h>
#include <net/net_namespace.h>
+#include <net/dropreason.h>
#include <net/cfg80211.h>
#include <net/addrconf.h>
@@ -1542,6 +1543,28 @@ void ieee80211_free_hw(struct ieee80211_hw *hw)
}
EXPORT_SYMBOL(ieee80211_free_hw);
+static const char * const drop_reasons_monitor[] = {
+#define V(x) #x,
+ [0] = "RX_DROP_MONITOR",
+ MAC80211_DROP_REASONS_MONITOR(V)
+};
+
+static struct drop_reason_list drop_reason_list_monitor = {
+ .reasons = drop_reasons_monitor,
+ .n_reasons = ARRAY_SIZE(drop_reasons_monitor),
+};
+
+static const char * const drop_reasons_unusable[] = {
+ [0] = "RX_DROP_UNUSABLE",
+ MAC80211_DROP_REASONS_UNUSABLE(V)
+#undef V
+};
+
+static struct drop_reason_list drop_reason_list_unusable = {
+ .reasons = drop_reasons_unusable,
+ .n_reasons = ARRAY_SIZE(drop_reasons_unusable),
+};
+
static int __init ieee80211_init(void)
{
struct sk_buff *skb;
@@ -1559,6 +1582,11 @@ static int __init ieee80211_init(void)
if (ret)
goto err_netdev;
+ drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR,
+ &drop_reason_list_monitor);
+ drop_reasons_register_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE,
+ &drop_reason_list_unusable);
+
return 0;
err_netdev:
rc80211_minstrel_exit();
@@ -1574,6 +1602,9 @@ static void __exit ieee80211_exit(void)
ieee80211_iface_exit();
+ drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_MONITOR);
+ drop_reasons_unregister_subsys(SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE);
+
rcu_barrier();
}
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index db3451f5f2fb..58222c077898 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -1826,7 +1826,7 @@ ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx)
cfg80211_rx_unexpected_4addr_frame(
rx->sdata->dev, sta->sta.addr,
GFP_ATOMIC);
- return RX_DROP_MONITOR;
+ return RX_DROP_M_UNEXPECTED_4ADDR_FRAME;
}
/*
* Update counter and free packet here to avoid
@@ -1961,7 +1961,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
cfg80211_rx_unprot_mlme_mgmt(rx->sdata->dev,
skb->data,
skb->len);
- return RX_DROP_MONITOR; /* unexpected BIP keyidx */
+ return RX_DROP_M_BAD_BCN_KEYIDX;
}
rx->key = ieee80211_rx_get_bigtk(rx, mmie_keyidx);
@@ -1975,7 +1975,7 @@ ieee80211_rx_h_decrypt(struct ieee80211_rx_data *rx)
if (mmie_keyidx < NUM_DEFAULT_KEYS ||
mmie_keyidx >= NUM_DEFAULT_KEYS + NUM_DEFAULT_MGMT_KEYS)
- return RX_DROP_MONITOR; /* unexpected BIP keyidx */
+ return RX_DROP_M_BAD_MGMT_KEYIDX; /* unexpected BIP keyidx */
if (rx->link_sta) {
if (ieee80211_is_group_privacy_action(skb) &&
test_sta_flag(rx->sta, WLAN_STA_MFP))
@@ -3960,7 +3960,8 @@ ieee80211_rx_h_mgmt(struct ieee80211_rx_data *rx)
}
static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
- struct ieee80211_rate *rate)
+ struct ieee80211_rate *rate,
+ ieee80211_rx_result reason)
{
struct ieee80211_sub_if_data *sdata;
struct ieee80211_local *local = rx->local;
@@ -4024,42 +4025,38 @@ static void ieee80211_rx_cooked_monitor(struct ieee80211_rx_data *rx,
}
out_free_skb:
- dev_kfree_skb(skb);
+ kfree_skb_reason(skb, (__force u32)reason);
}
static void ieee80211_rx_handlers_result(struct ieee80211_rx_data *rx,
ieee80211_rx_result res)
{
- switch (res) {
- case RX_DROP_MONITOR:
- I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
- if (rx->sta)
- rx->link_sta->rx_stats.dropped++;
- fallthrough;
- case RX_CONTINUE: {
- struct ieee80211_rate *rate = NULL;
- struct ieee80211_supported_band *sband;
- struct ieee80211_rx_status *status;
-
- status = IEEE80211_SKB_RXCB((rx->skb));
+ struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb);
+ struct ieee80211_supported_band *sband;
+ struct ieee80211_rate *rate = NULL;
- sband = rx->local->hw.wiphy->bands[status->band];
- if (status->encoding == RX_ENC_LEGACY)
- rate = &sband->bitrates[status->rate_idx];
+ if (res == RX_QUEUED) {
+ I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued);
+ return;
+ }
- ieee80211_rx_cooked_monitor(rx, rate);
- break;
- }
- case RX_DROP_UNUSABLE:
+ if (res != RX_CONTINUE) {
I802_DEBUG_INC(rx->sdata->local->rx_handlers_drop);
if (rx->sta)
rx->link_sta->rx_stats.dropped++;
- dev_kfree_skb(rx->skb);
- break;
- case RX_QUEUED:
- I802_DEBUG_INC(rx->sdata->local->rx_handlers_queued);
- break;
}
+
+ if (u32_get_bits((__force u32)res, SKB_DROP_REASON_SUBSYS_MASK) ==
+ SKB_DROP_REASON_SUBSYS_MAC80211_UNUSABLE) {
+ kfree_skb_reason(rx->skb, (__force u32)res);
+ return;
+ }
+
+ sband = rx->local->hw.wiphy->bands[status->band];
+ if (status->encoding == RX_ENC_LEGACY)
+ rate = &sband->bitrates[status->rate_idx];
+
+ ieee80211_rx_cooked_monitor(rx, rate, res);
}
static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx,
diff --git a/net/mac80211/wpa.c b/net/mac80211/wpa.c
index 20f742b5503b..4133496da378 100644
--- a/net/mac80211/wpa.c
+++ b/net/mac80211/wpa.c
@@ -550,7 +550,7 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
if (res < 0 ||
(!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
key->u.ccmp.replays++;
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_REPLAY;
}
if (!(status->flag & RX_FLAG_DECRYPTED)) {
@@ -564,7 +564,7 @@ ieee80211_crypto_ccmp_decrypt(struct ieee80211_rx_data *rx,
skb->data + hdrlen + IEEE80211_CCMP_HDR_LEN,
data_len,
skb->data + skb->len - mic_len))
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_MIC_FAIL;
}
memcpy(key->u.ccmp.rx_pn[queue], pn, IEEE80211_CCMP_PN_LEN);
@@ -746,7 +746,7 @@ ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
if (res < 0 ||
(!res && !(status->flag & RX_FLAG_ALLOW_SAME_PN))) {
key->u.gcmp.replays++;
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_REPLAY;
}
if (!(status->flag & RX_FLAG_DECRYPTED)) {
@@ -761,7 +761,7 @@ ieee80211_crypto_gcmp_decrypt(struct ieee80211_rx_data *rx)
data_len,
skb->data + skb->len -
IEEE80211_GCMP_MIC_LEN))
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_MIC_FAIL;
}
memcpy(key->u.gcmp.rx_pn[queue], pn, IEEE80211_GCMP_PN_LEN);
@@ -930,13 +930,13 @@ ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
(skb->data + skb->len - sizeof(*mmie));
if (mmie->element_id != WLAN_EID_MMIE ||
mmie->length != sizeof(*mmie) - 2)
- return RX_DROP_UNUSABLE; /* Invalid MMIE */
+ return RX_DROP_U_BAD_MMIE; /* Invalid MMIE */
bip_ipn_swap(ipn, mmie->sequence_number);
if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
key->u.aes_cmac.replays++;
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_REPLAY;
}
if (!(status->flag & RX_FLAG_DECRYPTED)) {
@@ -946,7 +946,7 @@ ieee80211_crypto_aes_cmac_decrypt(struct ieee80211_rx_data *rx)
skb->data + 24, skb->len - 24, mic);
if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
key->u.aes_cmac.icverrors++;
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_MIC_FAIL;
}
}
@@ -986,7 +986,7 @@ ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
if (memcmp(ipn, key->u.aes_cmac.rx_pn, 6) <= 0) {
key->u.aes_cmac.replays++;
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_REPLAY;
}
if (!(status->flag & RX_FLAG_DECRYPTED)) {
@@ -996,7 +996,7 @@ ieee80211_crypto_aes_cmac_256_decrypt(struct ieee80211_rx_data *rx)
skb->data + 24, skb->len - 24, mic);
if (crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
key->u.aes_cmac.icverrors++;
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_MIC_FAIL;
}
}
@@ -1079,13 +1079,13 @@ ieee80211_crypto_aes_gmac_decrypt(struct ieee80211_rx_data *rx)
(skb->data + skb->len - sizeof(*mmie));
if (mmie->element_id != WLAN_EID_MMIE ||
mmie->length != sizeof(*mmie) - 2)
- return RX_DROP_UNUSABLE; /* Invalid MMIE */
+ return RX_DROP_U_BAD_MMIE; /* Invalid MMIE */
bip_ipn_swap(ipn, mmie->sequence_number);
if (memcmp(ipn, key->u.aes_gmac.rx_pn, 6) <= 0) {
key->u.aes_gmac.replays++;
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_REPLAY;
}
if (!(status->flag & RX_FLAG_DECRYPTED)) {
@@ -1104,7 +1104,7 @@ ieee80211_crypto_aes_gmac_decrypt(struct ieee80211_rx_data *rx)
crypto_memneq(mic, mmie->mic, sizeof(mmie->mic))) {
key->u.aes_gmac.icverrors++;
kfree(mic);
- return RX_DROP_UNUSABLE;
+ return RX_DROP_U_MIC_FAIL;
}
kfree(mic);
}
generated by cgit (git 2.34.1) at 2024-06-14 16:00:22 +0000