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* Mysterious fs ioctl
@ 2019-10-22  1:22 Steve French
  0 siblings, 0 replies; only message in thread
From: Steve French @ 2019-10-22  1:22 UTC (permalink / raw)
  To: linux-fsdevel; +Cc: CIFS

Trying to track down this failing ioctl (on a file opened O_DIRECT):

strace showed:

 ioctl(4, _IOC(_IOC_WRITE, 0x95, 0x2, 0x4), 0x7ffe5b491664) = -1
ENOTTY  (Inappropriate ioctl for device)

I could find ioctls for 0x94 but not 0x95 in kernel source ... any
idea what ioctl
   _IOC_WRITE, 0x95, 0x2, 0x4)
is?

Wanted to make sure cifs.ko wasn't missing handling some important
ioctl for O_DIRECT workloads ...



-- 
Thanks,

Steve

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2019-10-22  1:22 Mysterious fs ioctl Steve French

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