I am trying to further implement the following Apple Kernel sample.
How do I parse / filter / the IOService which is handed to me?
I have tried several options, but am getting nowhere.
I need to know the name of the class (open, create, etc) and the
specific params for each call
client->serviceMatching( "open", table );
A filter scheme is located well below the filesystem, so it has no
knowledge of UNIX syscalls or files. A filter scheme only knows about
reading/writing a buffer at a particular location on an IOMedia object.
An IOMedia object is typically either a partition or the entire medium.
The IOService handed to you is the IOMedia object published by the
filter scheme.
Why do you want to intercept file I/O calls?
--gc
P.S. Please do not cross-post to multiple lists. If you do, people on
one list don't know anything about the responses on the other list. I'm
replying to the darwin-dev list only.
Note: this is a kext with KERNEL = 1, so not all api's are accessible.
// Read data from the storage object at the specified byte
offset into the
// specified buffer, asynchronously. When the read completes,
the caller
// will be notified via the specified completion action.
//
// The buffer will be retained for the duration of the read.
//
// For simple partition schemes, the default behavior is to simply
pass the
// read through to the provider media. More complex partition
schemes such
// as RAID will need to do extra processing here.
//
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