Date: Sat, 4 Nov 2017 19:49:47 -0400 From: Farhan Khan <khanzf@gmail.com> To: freebsd-wireless@freebsd.org Subject: Identify cause of ieee80211_get_counter Message-ID: <9f785504-1920-dee3-b3d7-55538b538c9f@gmail.com>
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Hi everyone.
I am working through the driver, and running into some
ieee80211_get_counter()'s. Per sys/net80211/ieee80211.c, the comment
says "Add underlying device errors to vap errors", which implies that it
will only trigger when an error occurs.
Is there a way to identify what the cause of the function call is? I ran
dtrace against "fbt:kernel:ieee80211_get_counter:entry" with a stack()
trace as follows:
CPU ID FUNCTION:NAME
3 17127 ieee80211_get_counter:entry
kernel`if_data_copy+0xa1
kernel`sysctl_rtsock+0x2b6
kernel`sysctl_root_handler_locked+0x7b
kernel`sysctl_root+0x1c6
kernel`userland_sysctl+0x148
kernel`sys___sysctl+0x5f
kernel`amd64_syscall+0x79b
kernel`0xffffffff80ed07bb
Is there an efficient way to identify what the cause of the error is?
Thank you,
--
Farhan Khan
PGP Fingerprint: B28D 2726 E2BC A97E 3854 5ABE 9A9F 00BC D525 16EE
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