From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sog-mx-1.v43.ch3.sourceforge.com ([172.29.43.191] helo=mx.sourceforge.net) by sfs-ml-2.v29.ch3.sourceforge.com with esmtp (Exim 4.69) (envelope-from ) id 1PGS2Y-0005JX-Ar for ltp-list@lists.sourceforge.net; Thu, 11 Nov 2010 07:57:50 +0000 Received: from e6.ny.us.ibm.com ([32.97.182.146]) by sog-mx-1.v43.ch3.sourceforge.com with esmtps (TLSv1:AES256-SHA:256) (Exim 4.69) id 1PGS2V-00062l-Ug for ltp-list@lists.sourceforge.net; Thu, 11 Nov 2010 07:57:50 +0000 Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by e6.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id oAB7wbRB032605 for ; Thu, 11 Nov 2010 02:58:37 -0500 Received: from d01av02.pok.ibm.com (d01av02.pok.ibm.com [9.56.224.216]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id oAB7vg17307086 for ; Thu, 11 Nov 2010 02:57:42 -0500 Received: from d01av02.pok.ibm.com (loopback [127.0.0.1]) by d01av02.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id oAB7vfU8004405 for ; Thu, 11 Nov 2010 05:57:42 -0200 From: Subrata Modak In-Reply-To: <20101028052203.GA28332@us.ibm.com> References: <20100804235206.GA1388@us.ibm.com> <20100805014358.GA14122@us.ibm.com> <1281970341.5120.18.camel@subratamodak.linux.ibm.com> <20101028052203.GA28332@us.ibm.com> Date: Thu, 11 Nov 2010 13:27:20 +0530 Message-Id: <1289462240.5622.45.camel@subratamodak.linux.ibm.com> Mime-Version: 1.0 Subject: Re: [LTP] pidns31: fix EACCESS error in mq_open() Reply-To: subrata@linux.vnet.ibm.com List-Id: Linux Test Project General Discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: ltp-list-bounces@lists.sourceforge.net To: Sukadev Bhattiprolu , Garrett Cooper Cc: ltp-list@lists.sourceforge.net On Wed, 2010-10-27 at 22:22 -0700, Sukadev Bhattiprolu wrote: > Garrett Cooper [yanegomi@gmail.com] wrote: > | On Mon, Aug 16, 2010 at 7:52 AM, Subrata Modak > | wrote: > | > > | > On Wed, 2010-08-04 at 18:43 -0700, Sukadev Bhattiprolu wrote: > | >> Garrett Cooper [yanegomi@gmail.com] wrote: > | >> | On Wed, Aug 4, 2010 at 4:52 PM, Sukadev Bhattiprolu > | >> | wrote: > | >> | > > | >> | > pidns31: mq_open() fails with EACCESS. > | >> | > > | >> | > pidns31 test case fails with EACCESS - due to the leading '/' in > | >> | > mqname. See comments in the patch below for details. > | >> | > > | >> | > Signed-off-by: Sukadev Bhattiprolu > | >> | > --- > | >> | > Index: testcases/kernel/containers/pidns/pidns31.c > | >> | > =================================================================== > | >> | > RCS file: /cvsroot/ltp/ltp/testcases/kernel/containers/pidns/pidns31.c,v > | >> | > retrieving revision 1.6 > | >> | > diff -u -p -r1.6 pidns31.c > | >> | > --- testcases/kernel/containers/pidns/pidns31.c 14 Nov 2009 23:58:26 -0000 1.6 > | >> | > +++ testcases/kernel/containers/pidns/pidns31.c 4 Aug 2010 23:24:54 -0000 > | >> | > @@ -61,7 +61,14 @@ > | >> | > char *TCID = "pidns31"; > | >> | > int TST_TOTAL = 1; > | >> | > > | >> | > -char *mqname = "/mq1"; > | >> | > + > | >> | > +/* > | >> | > + * NOTE: The mq_open() interface in glibc requires mqname to start with a '/' > | >> | > + * and the glibc call skips the leading '/' when invoking the system > | >> | > + * call. Since we bypass the glibc mq_open() (and use syscall()) we > | >> | > + * define mqname without the leading '/'. > | >> | > + */ > | >> | > +char *mqname = "mq1"; > | >> | > int result = TFAIL; > | >> | > > | >> | > int errno; > | >> | > @@ -264,6 +271,7 @@ int main(int argc, char *argv[]) > | >> | > } > | >> | > > | >> | > syscall(__NR_mq_unlink, mqname); > | >> | > + > | >> | > mqd = syscall(__NR_mq_open, mqname, O_RDWR|O_CREAT|O_EXCL, 0777, NULL); > | >> | > if (mqd == (mqd_t)-1) { > | >> | > tst_resm(TBROK, "parent: mq_open() failed (%s)", > | >> | > | >> | Did Linux become non-POSIX compliant :) (from > | >> | )? > | >> > | >> Heh. Good question but I think the mq_open() from glibc is compliant > | >> with this. I am just not sure if the call via syscall() needs to be > | >> compliant. > | >> > | >> But if that is a concern, we need a separate a test case for that - > | >> pidns31 is using mq_* to test an unrelated feature. I think would > | >> make sense to apply this fix, allowing LTP to test the feature even > | >> on older distros. > | >> > | >> Or pidns31 can go back to using the library interface and we could > | >> skip the test on old distros. > | > > | > I would prefer this. > | > | Do I hear someone volunteering to add the required autoconf tests and > | tests for this :)? > > Well, I thought we could add a simple autoconf test for the pidns - but > then realized that mq_open() calls were changed for many other test cases > too. The test cases include mqueue.h, which would not be present in old > distros anyway. > > So, I don't see the point in fixing this just for pidns tests. If we want > to use the syscall() interface, why don't we just design the test to work > with the syscall behavior - i.e just remove the '/' from the name ? Garret, Your thoughts ? Regards-- Subrata > > Sukadev ------------------------------------------------------------------------------ Centralized Desktop Delivery: Dell and VMware Reference Architecture Simplifying enterprise desktop deployment and management using Dell EqualLogic storage and VMware View: A highly scalable, end-to-end client virtualization framework. Read more! http://p.sf.net/sfu/dell-eql-dev2dev _______________________________________________ Ltp-list mailing list Ltp-list@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ltp-list