Lars Kellogg-Stedman <lars@xxxxxxxxxx> wrote: > Hello all, > > The fence_scsi method provided with RedHat's cman package uses SCSI > persistent reservations as an i/o fencing mechanism. I've tried using > this against an iSCSI target served by tgtd without much luck. > > The tool is able to successfully create a reservation by running: > > sg_persist -n -d <device> -o -R -K <key> -T 5 > > fence_scsi uses --preempt-abort to fence another node (prevent it from > accessing a device) by running: > > sg_persist -n -d <device> -o -A -K <local key> -S <other key> -T 5 > > This results in the following error from sg_persist: > > PR out: bad field in cdb including unsupported service action > > I'm using the version of scsi-target-utils distributed with Fedora 13 > (scsi-target-utils-1.0.1-4.fc13.x86_64). Has anyone else run into > these problems? Is this expected to work? > > The tgt configuration looks like this: > > default-driver iscsi > > <target iqn.2001-04.com.obliquity-tgt-1> > backing-store /var/lib/libvirt/images/shared.img > </target> > > I see the same error message with tgtd 1.0.9. Additionally, both > versions appear to freeze up completely if I try to use --preempt > instead of --preempt-abort. The PR_OUT_PREEMPT_AND_ABORT service action is currently not supported. You may have already seen this by the commented out service action in spc.c. I am seeing the freeze also. We are in a endless goto loop in spc_pr_preempt based on a non-zero service action key. Working on a patch for the --preempt case now by verifying the code vs. the preempt flow chart in the spc specification. I assume you are more interested in the support for --preempt-abort. I will look at this next unless others are already working on it. -andmike -- Michael Anderson andmike@xxxxxxxxxxxxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
