Re: Kqueue write event position?

On 11/22/06, Ivan Voras <ivoras@xxxxxx> wrote:
>From the kqueue(2) manual:

"""
EVFILT_VNODE Takes a file descriptor as the identifier and the events
to watch for in fflags, and returns when one or more of
the requested events occurs on the descriptor. The
events
to monitor are:...
"""

I'm interested in NOTE_WRITE, but is there a way to find out where has
the write been performed (position and length)? If not, how difficult
would it be to expand the API so this information is included?


It seems to me you would have to propagate that info along the
VOP_WRITE_POST->VFS_KNOTE_LOCKED->VN_KNOTE->knote() chain. Since
knote() is generic and is used for all types of notifications, you can
probably roll down your own replacement and call it from VN_KNOTE. Of
course, there probably is a better way :)


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