Date: Sun, 14 Sep 2008 16:18:09 +0300 From: Kostik Belousov <kostikbel@gmail.com> To: vehemens <vehemens@verizon.net> Cc: freebsd-current@freebsd.org Subject: Re: cdefpriv usage (was: bsd versus linux device drivers) Message-ID: <20080914131809.GX39652@deviant.kiev.zoral.com.ua> In-Reply-To: <200809132151.18008.vehemens@verizon.net> References: <200809080202.00664.vehemens@verizon.net> <20080911090449.GV39652@deviant.kiev.zoral.com.ua> <200809111013.34194.vehemens@verizon.net> <200809132151.18008.vehemens@verizon.net>
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[-- Attachment #1 --] On Sat, Sep 13, 2008 at 09:51:17PM -0700, vehemens wrote: > On Thursday 11 September 2008 10:13:34 am vehemens wrote: > ... > > Looks like the ioctl get randomly fails with ENOENT. > > Turned out to be a bug in my code. > > > Something else is going on with mmap get which fails with EBADF almost all > > of the time.. > > Looking at the man page and code, it appears that cdevpriv has not been > implemented for mmap. Yes, d_mmap is mostly called from PF# context, where no associated fp is available. This is fixable, but somewhat ugly. > > I'm still somewhat confused about what cdevpriv is supposed to do. I was > after per open private data association, and the code appears to only > implement per thread open private data association. It is "after per open". [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (FreeBSD) iEYEARECAAYFAkjNDxAACgkQC3+MBN1Mb4jdvACeNLG8ReakvA+5OJOJmkY1Xqlh ckQAn3aC36i70MvXtC6yFAYt0H3MkE25 =sTOT -----END PGP SIGNATURE-----
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