Date: Sat, 4 Jun 2011 20:01:13 -0400 (EDT) From: Benjamin Kaduk <kaduk@MIT.EDU> To: Ali Mashtizadeh <mashtizadeh@gmail.com> Cc: FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: Opening files from within geom filters Message-ID: <alpine.GSO.1.10.1106041956190.6818@multics.mit.edu> In-Reply-To: <BANLkTimuJvMw2MRKiSLjD5erhyg_xE-w3Q@mail.gmail.com> References: <BANLkTimuJvMw2MRKiSLjD5erhyg_xE-w3Q@mail.gmail.com>
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On Sat, 4 Jun 2011, Ali Mashtizadeh wrote: > Hi Folks, > > I'm working on a small geom filter where I need to open a file with > vn_open_cred, but this causes an assert because of a null pointer > because g_run_event proc structure has null pointer for the current > working directory. Hi Ali, In general, it is not recommended to open a file from within the kernel, due to a multitude of complications and difficulties. The old thread here: http://lists.freebsd.org/pipermail/freebsd-hackers/2007-May/020544.html may provide you with some other options to do what you're doing, and insight from a previous time when this sort of question came up. -Ben Kaduk
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