96 lines
2.7 KiB
C
96 lines
2.7 KiB
C
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/* 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 Intel Corporation
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*****************************************************************************/
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#ifndef __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 "iwl-trans.h"
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#if !defined(__IWLWIFI_DEVICE_TRACE)
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static inline bool iwl_trace_data(struct sk_buff *skb)
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{
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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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/* 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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#endif
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#define __IWLWIFI_DEVICE_TRACE
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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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#endif /* __IWLWIFI_DEVICE_TRACE */
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