1261fefa64
When there's not going to be any data in the data event, we don't need to add it at all (unlike the TX version, it has no data at all.) Also combine the tracing into a separate inline so we only call iwl_rx_trace_len() once, which also simplifies things, and lets us have a single place to later add other checks. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com> Link: https://msgid.link/20231207044813.13325a4848d2.Ic9e7d794fc4aebfe5ac5136b539ee62789f210f3@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/******************************************************************************
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*
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* Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
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* Copyright(C) 2016 Intel Deutschland GmbH
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* Copyright(c) 2018, 2023 Intel Corporation
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*****************************************************************************/
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#ifndef __IWLWIFI_DEVICE_TRACE
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#define __IWLWIFI_DEVICE_TRACE
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#include <linux/skbuff.h>
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#include <linux/ieee80211.h>
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#include <net/cfg80211.h>
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#include <net/mac80211.h>
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#include "iwl-trans.h"
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static inline bool iwl_trace_data(struct sk_buff *skb)
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{
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struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
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struct ieee80211_hdr *hdr = (void *)skb->data;
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__le16 fc = hdr->frame_control;
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int offs = 24; /* start with normal header length */
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if (!ieee80211_is_data(fc))
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return false;
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/* If upper layers wanted TX status it's an important frame */
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if (info->flags & IEEE80211_TX_CTL_REQ_TX_STATUS)
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return false;
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/* Try to determine if the frame is EAPOL. This might have false
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* positives (if there's no RFC 1042 header and we compare to some
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* payload instead) but since we're only doing tracing that's not
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* a problem.
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*/
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if (ieee80211_has_a4(fc))
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offs += 6;
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if (ieee80211_is_data_qos(fc))
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offs += 2;
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/* don't account for crypto - these are unencrypted */
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/* also account for the RFC 1042 header, of course */
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offs += 6;
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return skb->len <= offs + 2 ||
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*(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE);
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}
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static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
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void *rxbuf, size_t len,
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size_t *out_hdr_offset)
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{
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struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32));
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struct ieee80211_hdr *hdr = NULL;
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size_t hdr_offset;
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if (cmd->cmd != trans->rx_mpdu_cmd)
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return len;
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hdr_offset = sizeof(struct iwl_cmd_header) +
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trans->rx_mpdu_cmd_hdr_size;
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if (out_hdr_offset)
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*out_hdr_offset = hdr_offset;
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hdr = (void *)((u8 *)cmd + hdr_offset);
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if (!ieee80211_is_data(hdr->frame_control))
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return len;
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/* maybe try to identify EAPOL frames? */
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return sizeof(__le32) + sizeof(*cmd) + trans->rx_mpdu_cmd_hdr_size +
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ieee80211_hdrlen(hdr->frame_control);
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}
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#include <linux/tracepoint.h>
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#include <linux/device.h>
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#if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
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#undef TRACE_EVENT
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#define TRACE_EVENT(name, proto, ...) \
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static inline void trace_ ## name(proto) {}
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#undef DECLARE_EVENT_CLASS
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#define DECLARE_EVENT_CLASS(...)
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#undef DEFINE_EVENT
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#define DEFINE_EVENT(evt_class, name, proto, ...) \
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static inline void trace_ ## name(proto) {}
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#endif
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#define DEV_ENTRY __string(dev, dev_name(dev))
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#define DEV_ASSIGN __assign_str(dev, dev_name(dev))
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#include "iwl-devtrace-io.h"
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#include "iwl-devtrace-ucode.h"
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#include "iwl-devtrace-msg.h"
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#include "iwl-devtrace-data.h"
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#include "iwl-devtrace-iwlwifi.h"
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#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
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DECLARE_TRACEPOINT(iwlwifi_dev_rx);
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DECLARE_TRACEPOINT(iwlwifi_dev_rx_data);
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#endif
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void __trace_iwlwifi_dev_rx(struct iwl_trans *trans, void *pkt, size_t len);
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static inline void maybe_trace_iwlwifi_dev_rx(struct iwl_trans *trans,
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void *pkt, size_t len)
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{
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#ifdef CONFIG_IWLWIFI_DEVICE_TRACING
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if (tracepoint_enabled(iwlwifi_dev_rx) ||
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tracepoint_enabled(iwlwifi_dev_rx_data))
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__trace_iwlwifi_dev_rx(trans, pkt, len);
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#endif
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}
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#endif /* __IWLWIFI_DEVICE_TRACE */
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