Date: Tue, 4 Aug 2009 23:04:57 +0200 From: Pawel Jakub Dawidek <pjd@FreeBSD.org> To: Maslan <maslanbsd@gmail.com> Cc: Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?= <des@des.no>, FreeBSD Hackers <freebsd-hackers@freebsd.org> Subject: Re: sosend() and mbuf Message-ID: <20090804210457.GF2181@garage.freebsd.pl> In-Reply-To: <319cceca0908031425r3516de29q34807cdf2c7489ed@mail.gmail.com> References: <319cceca0908030119i3432a495ya60aa431dab0e1b1@mail.gmail.com> <864ospvvkv.fsf@ds4.des.no> <319cceca0908031043x6bfe5771wa73553dce922756a@mail.gmail.com> <86eirs65gb.fsf@ds4.des.no> <319cceca0908031425r3516de29q34807cdf2c7489ed@mail.gmail.com>
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--Zi0sgQQBxRFxMTsj Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Mon, Aug 03, 2009 at 09:25:27PM +0000, Maslan wrote: > No my code doesn't work, I thought it may be because that soaccept() > -which is not found in man 9- is non-blocking, so i've to put my code > in a thread. > Now i got another problem, when I open a text file from this thread, > the kernel crashes, I'm sure that its the thread. >=20 > kthread_create((void *)thread_main, NULL, NULL, RFNOWAIT, 0, "thread"); >=20 > void thread_main(){ > struct thread *td =3D curthread; > int ret; > int fd; > ret =3D f_open("/path/to/file.txt", &fd); > printf("%d\n", ret); > tsleep(td, PDROP, "test tsleep", 10*hz); > f_close(fd); > kthread_exit(0); > } >=20 > int f_open(char *filename, int *fd){ > struct thread *td =3D curthread; > int ret =3D kern_open(td, filename, UIO_SYSSPACE, O_RDONLY, FREAD); > if(!ret){ > *fd =3D td->td_retval[0]; > return 1; > } > return 0; > } >=20 > I've to finish up this problem to go back for the first one. > Can you figure out what's wrong with this code, it works when I call > thread_main() rather than kthread_create((void *)thread_main, ..... When you did kern_open() without creating kernel thread, it worked, because kern_open() used file descriptor table from your current (userland) process. In FreeBSD 7.x kthread_create() creates a process without file descriptor table, so you can't use kern_open() and actually you shouldn't do this either. Take a look at sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c, where you can find functions to do what you want. I guess you already considered doing all this in userland?:) --=20 Pawel Jakub Dawidek http://www.wheel.pl pjd@FreeBSD.org http://www.FreeBSD.org FreeBSD committer Am I Evil? Yes, I Am! --Zi0sgQQBxRFxMTsj Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.4 (FreeBSD) iD8DBQFKeKJ5ForvXbEpPzQRAoEoAJsEUEFVHoo7LUjhPz1m04KB5LDuPgCg+J38 aVvIaYP47XokZiqx7Ry2iqA= =8DQI -----END PGP SIGNATURE----- --Zi0sgQQBxRFxMTsj--
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