Re: TAKE2: Problems testing with IOStorageFamily.kext

16 Jan 2004

      Hi Chris,

You could just insert your own d_open and d_close routines which track

what you need and call into the original function when done.

I am not sure why the debug driver does not load.  You can verify it

with the following command after installing it.  Be certain that the

source it built on the appropriate system version as well.

kextload -nt /System/Library/Extensions/IOStorageFamily.kext

Dan

On Jan 15, 2004, at 5:59 PM, Chris Walters wrote:
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Dan Markarian wrote:
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Hi Chris,
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It sounds like your open on the device was closed at some point.  The
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strategy will return an EACCES on a read should that device not still
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be open.
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The Storage Family does not return EACCES on a read in any other
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context, however, it is plausible the error came from a driver below
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the family, of course.
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This is the case... the device was closed, but I'm pretty sure it
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wasn't by our driver. If I load my FileSystem from within a login the
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strategy succeeds. What I find is when I log out and then back in
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(even as the same user) I get the EACCES error. I initially ran into
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this problem by starting my FileSystem on boot and trying to do tests
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as a user.
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I have traced using gdb into the media layer which returns the error.
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I can only assume that another entity is closing the device (maybe
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prompted by the logout or login). This is why I want to have a debug
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version of IOStorageFamily so I can see when the device is closed. Any
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ideas?
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Thanks.
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Dan
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On Jan 14, 2004, at 6:33 PM, Chris Walters wrote:
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I'm developing a File System which is getting an EACCES error from
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doing a strategy call to the IOStorageFamily. I need to be able to
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build and install a debug version of IOStorageFamily. Building it is
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easy (with either ProjectBuilder or pbxbuild)... the problem is when
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I install and restart the system I get the "No Entry" symbol.
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Could somebody explain why my kext isn't working...
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* do I have to copy more than just the kext?
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* is there a difference between building with ProjectBuilder or
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pbxbuild?
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Thanks.
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