How to use vn_rdwr() to write to file in a driver context?

hi!
i now am trying to write to file in a driver using vn_rdwr(),but
it returns a value 0x1b ,i think the ioflag parameter is the
reason for it ,so i kadb into ufs :wrip ,here (wrip) it return
the 0x1b ,but it seemed the result is unrelationed to the ioflag.
so what's the reason?
if i do want to write in this way ,do i need to analysize
the file system and vm every inch?

Leaving behind the long discussion of DDI/DDK compliance of the thing
(see it in old threads here and in Kernel - about half a year ago),
I can tell you that the thing works for me... Still, wouldn't use it in driver (I have no choice in file system though).
The return value of vn_* family seems to be the errno,
so 0x1b == 27 == EFBIG...
As for flags - see /usr/include/sys/vnode.h for appropiate enums.
Once more - are you 100% sure you need your driver to write anything to file? There are conventional ways of driver-userland communication (notably, the ioctl() entry point)...
Hope this helps...
Sincerely,
Ilya.
P.S. You may be pretty sure that your driver won't work in the next version of Solaris if you'll use vn_* functions in it...

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