vnode

[Julian Elischer]

On 7/23/12 1:30 AM, Mehdi Esmaeelpour wrote:
> On Sun, Jul 22, 2012 at 3:40 PM, Rick Macklem <rmacklem at uoguelph.ca> wrote:
>
>> Mehdi Esmaeelpour wrote:
>>> folks
>>>
>>> How i use vn_rdwr() to write to a file? i am starter and don't know
>>> anything! but i search for this but cannot find anything.
>>>
>> I'd say avoid reading/writing files from within the kernel if possible,
>> but if you must do it, you can look at the use of NFSD_RDWR in
>> sys/fs/nfsserver/nfs_nfsdstate.c. (NFSD_RDWR() is just a macro that becomes
>> a call to vn_rdwr(). Look in sys/fs/nfs/nfsport.h for the macro.
>>
>> rick
>>
>>> Thanks
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>
> Thanks rick but that file is complex ... and I'm beginner.

there are several parts of the kernel that write out information directly.
try looking at the ALQ code.
(used with KTR) (ktrdump  etc.)

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