Re: Binary sysfs blobs
- From: Pete Zaitcev <zaitcev@xxxxxxxxxx>
- Date: Wed, 12 Apr 2006 03:34:13 -0700
On Tue, 11 Apr 2006 13:42:03 -0700, Greg KH <greg@xxxxxxxxx> wrote:
No. Binary sysfs files are for "pass-through" mode only. You are ONLY
allowed to use them if you want to read from, or write to, some bit of
hardware and not manipulate the data at all. Examples of this is the
raw PCI config space, firmware binary blobs and BIOS upgrades.
I see. Kind of the opposite of what I thought they were, but it
makes sense. Thanks.
You should NEVER pass a raw structure through sysfs by using a binary
file. If anyone sees anywhere in the current kernel that does this,
please let me know and I'll go hit them with a big stick...
I dunno how raw this is, but chp_measurement_copy_block and
chp_measurement_read (in drivers/s390/cio/chsc.c) sure look like
passing structures, in 2.6.17-rc1. However, the code does not interpret
the structures, so maybe it's raw enough.
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