Date: Sun, 19 Mar 2023 12:32:53 +0100 From: Yuri <yuri@aetern.org> To: =?UTF-8?Q?Goran_Meki=c4=87?= <meka@tilda.center>, freebsd-current@FreeBSD.org Subject: Re: Infinite loop with d_write_t Message-ID: <e418c6f4-ab10-020e-0b94-2f47d3182fb2@aetern.org> In-Reply-To: <20230319111404.a6ac2w44u4trtedy@tilda.center> References: <20230319111404.a6ac2w44u4trtedy@tilda.center>
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Goran Mekić wrote: > Hello, > > I'm trying to assemble a minimal kernel module and user space program as > a skeleton, and no matter what I do I get infinite loop. The code for > kernel is https://github.com/mekanix/freebsd-project/blob/master/kernel/main.c. > The way to test: > # make > # sudo kldload ./hello.ko > # echo "something" >/dev/hello > Write done. > Write done. > ... > > What am I doing wrong and where does that infinite loop comes from? Why are you using copyin() and not uiomove() in d_write entry? There's an example that looks like you are trying to do: https://docs.freebsd.org/en/books/arch-handbook/driverbasics/#driverbasics-char
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