root/drivers/net/wireless/intel/iwlwifi/iwl-devtrace.h

INCLUDED FROM

DEFINITIONS

1. iwl_trace_data
2. iwl_rx_trace_len

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /******************************************************************************
   3  *
   4  * Copyright(c) 2009 - 2014 Intel Corporation. All rights reserved.
   5  * Copyright(C) 2016        Intel Deutschland GmbH
   6  * Copyright(c) 2018        Intel Corporation
   7  *
   8  * Contact Information:
   9  *  Intel Linux Wireless <linuxwifi@intel.com>
  10  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  11  *
  12  *****************************************************************************/
  13 
  14 #ifndef __IWLWIFI_DEVICE_TRACE
  15 #include <linux/skbuff.h>
  16 #include <linux/ieee80211.h>
  17 #include <net/cfg80211.h>
  18 #include "iwl-trans.h"
  19 #if !defined(__IWLWIFI_DEVICE_TRACE)
  20 static inline bool iwl_trace_data(struct sk_buff *skb)
  21 {
  22         struct ieee80211_hdr *hdr = (void *)skb->data;
  23         __le16 fc = hdr->frame_control;
  24         int offs = 24; /* start with normal header length */
  25 
  26         if (!ieee80211_is_data(fc))
  27                 return false;
  28 
  29         /* Try to determine if the frame is EAPOL. This might have false
  30          * positives (if there's no RFC 1042 header and we compare to some
  31          * payload instead) but since we're only doing tracing that's not
  32          * a problem.
  33          */
  34 
  35         if (ieee80211_has_a4(fc))
  36                 offs += 6;
  37         if (ieee80211_is_data_qos(fc))
  38                 offs += 2;
  39         /* don't account for crypto - these are unencrypted */
  40 
  41         /* also account for the RFC 1042 header, of course */
  42         offs += 6;
  43 
  44         return skb->len <= offs + 2 ||
  45                 *(__be16 *)(skb->data + offs) != cpu_to_be16(ETH_P_PAE);
  46 }
  47 
  48 static inline size_t iwl_rx_trace_len(const struct iwl_trans *trans,
  49                                       void *rxbuf, size_t len,
  50                                       size_t *out_hdr_offset)
  51 {
  52         struct iwl_cmd_header *cmd = (void *)((u8 *)rxbuf + sizeof(__le32));
  53         struct ieee80211_hdr *hdr = NULL;
  54         size_t hdr_offset;
  55 
  56         if (cmd->cmd != trans->rx_mpdu_cmd)
  57                 return len;
  58 
  59         hdr_offset = sizeof(struct iwl_cmd_header) +
  60                      trans->rx_mpdu_cmd_hdr_size;
  61 
  62         if (out_hdr_offset)
  63                 *out_hdr_offset = hdr_offset;
  64 
  65         hdr = (void *)((u8 *)cmd + hdr_offset);
  66         if (!ieee80211_is_data(hdr->frame_control))
  67                 return len;
  68         /* maybe try to identify EAPOL frames? */
  69         return sizeof(__le32) + sizeof(*cmd) + trans->rx_mpdu_cmd_hdr_size +
  70                 ieee80211_hdrlen(hdr->frame_control);
  71 }
  72 #endif
  73 
  74 #define __IWLWIFI_DEVICE_TRACE
  75 
  76 #include <linux/tracepoint.h>
  77 #include <linux/device.h>
  78 
  79 
  80 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
  81 #undef TRACE_EVENT
  82 #define TRACE_EVENT(name, proto, ...) \
  83 static inline void trace_ ## name(proto) {}
  84 #undef DECLARE_EVENT_CLASS
  85 #define DECLARE_EVENT_CLASS(...)
  86 #undef DEFINE_EVENT
  87 #define DEFINE_EVENT(evt_class, name, proto, ...) \
  88 static inline void trace_ ## name(proto) {}
  89 #endif
  90 
  91 #define DEV_ENTRY       __string(dev, dev_name(dev))
  92 #define DEV_ASSIGN      __assign_str(dev, dev_name(dev))
  93 
  94 #include "iwl-devtrace-io.h"
  95 #include "iwl-devtrace-ucode.h"
  96 #include "iwl-devtrace-msg.h"
  97 #include "iwl-devtrace-data.h"
  98 #include "iwl-devtrace-iwlwifi.h"
  99 
 100 #endif /* __IWLWIFI_DEVICE_TRACE */