From owner-freebsd-fs@FreeBSD.ORG Thu Aug 14 18:53:33 2014 Return-Path: Delivered-To: freebsd-fs@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 5EAB4D50 for ; Thu, 14 Aug 2014 18:53:33 +0000 (UTC) Received: from mail-lb0-x22d.google.com (mail-lb0-x22d.google.com [IPv6:2a00:1450:4010:c04::22d]) (using TLSv1 with cipher ECDHE-RSA-RC4-SHA (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id DBBA72FD8 for ; Thu, 14 Aug 2014 18:53:32 +0000 (UTC) Received: by mail-lb0-f173.google.com with SMTP id u10so1189059lbd.32 for ; Thu, 14 Aug 2014 11:53:30 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=sender:date:from:to:subject:message-id:mime-version:content-type :content-disposition:user-agent; bh=LcrfzSGswlYzGIF/oKBfHnePdP3PWbPSaqvZa/rhPyk=; b=O8W6ZIkNa4j9FqaKqao0vorL2ygR7anv/TCoTkJnZSwz0UzFtCyAbctiTUYmXXaGcA VYYOxPmo6JOAykwRIlovfhttmXgrJ3o6d/WNcs6t2ks0JxSTZVqLUtIuT0RpRIzrklaX gqM9PAUAvfbbFCy7tskEU2KJb2CTteMJUF4EF6+taXoXgeXOpHL2LibF5pAGOtnI3NhA DDrw7/2Pn4oM/t4uaKM8LWWNNG0chE42Nu3v70Lu34/J9WrmHWkVoMBQeI5uJtXsfX2w Fm2dnT6l+sjBSbvCxpQQ98ItNvZgy/0dMPmUE8l7yOOgzNbVBB4nBPgVFmgYuhC2Ii3J kr3Q== X-Received: by 10.112.48.103 with SMTP id k7mr7060562lbn.32.1408042410786; Thu, 14 Aug 2014 11:53:30 -0700 (PDT) Received: from kloomba ([95.104.137.112]) by mx.google.com with ESMTPSA id j2sm3560324laf.15.2014.08.14.11.53.29 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Aug 2014 11:53:29 -0700 (PDT) Sender: Roman Bogorodskiy Date: Thu, 14 Aug 2014 22:52:33 +0400 From: Roman Bogorodskiy To: freebsd-fs@freebsd.org Subject: O_NONBLOCK on zfs volume Message-ID: <20140814185232.GB7913@kloomba> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="H1spWtNR+x+ondvy" Content-Disposition: inline User-Agent: Mutt/1.5.23 (2014-03-12) X-BeenThere: freebsd-fs@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Filesystems List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Aug 2014 18:53:33 -0000 --H1spWtNR+x+ondvy Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi, I have a zfs volume of type 'dev': $ zfs get type,volmode test/vol5 NAME PROPERTY VALUE SOURCE test/vol5 type volume - test/vol5 volmode dev local $ I'm trying to set O_NONBLOCK on its device, a sample program I use looks like this: int main(int argc, char **argv) { int fd =3D open("/dev/zvol/test/vol5", O_RDONLY); int ret =3D fcntl(fd, F_SETFL, O_NONBLOCK); =20 if (ret < 0) perror("fcntl"); } When I run it I get: fcntl: Inappropriate ioctl for device Could anybody please describe what's the reason of this behaviour? Roman Bogorodskiy --H1spWtNR+x+ondvy Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.13 (FreeBSD) iQEcBAEBAgAGBQJT7QVwAAoJEMltX/4IwiJqIZUIAI+IZ7q59HtrL+TlvFYk7SUo xvkMUrQyB48UE859UhTrcZjqWSCLAIZ9yPZNBfwpxfKC3agNpq9GvwTteBhv9loG HcD+LcGufJ6AT+ILpKjoFP6D4rbsu7P/m6/SqqpeS8OxfRFlzUf9PiBEU4fh3CXs S+C/rTb51f/YrEE5kD8xfWS8pFEvbX1LsqRjU9Hts+5upO0jGXwVfjccLA0oqt46 KGUL8vDxUNvM2OAkgwbhmIcXrX8ofGoH/ERdE36INHkWGoF+dlOJaa21XBLLAgSL SG9pLv0YDCzdX55GC+mMHJcRzxMlV+oJqh2MLzoKJbnvOcfQmgyN14/Ldwrvc/A= =Jsdg -----END PGP SIGNATURE----- --H1spWtNR+x+ondvy--