Bug 861843
| Summary: | lvm2app value = lvm_lv_get_property(lvmLV, "snap_percent") segfaults on thin snapshots | ||
|---|---|---|---|
| Product: | Red Hat Enterprise Linux 6 | Reporter: | benscott |
| Component: | lvm2 | Assignee: | Zdenek Kabelac <zkabelac> |
| Status: | CLOSED ERRATA | QA Contact: | Cluster QE <mspqa-list> |
| Severity: | unspecified | Docs Contact: | |
| Priority: | high | ||
| Version: | 6.5 | CC: | agk, cmarthal, coughlan, dwysocha, heinzm, jbrassow, msnitzer, prajnoha, prockai, thornber, zkabelac |
| Target Milestone: | rc | ||
| Target Release: | --- | ||
| Hardware: | Unspecified | ||
| OS: | Unspecified | ||
| Whiteboard: | |||
| Fixed In Version: | lvm2-2.02.98-1.el6 | Doc Type: | Enhancement |
| Doc Text: |
Feature:
The lvm2app library now reports the data_percent field which indicates how full snapshots, thin pools and volumes are. (The Logical Volume needs to be active to obtain this information.)
Reason:
Thin snapshots have a new different way of reporting its usage.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2013-02-21 08:14:06 UTC | Type: | Bug |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
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Description
benscott
2012-10-01 05:40:23 UTC
Fix upstream (avoid detecting snap_percent on non-snap volume) https://www.redhat.com/archives/lvm-devel/2012-October/msg00026.html NB: thin snapshot doesn't have 'snap_percent' property - only 'data_percent' since thin_pool shares all the space between all its volume. Thus you could only obtain value of 'mapped' spaces (just like with any other thin volume). Here is simple lvm2api test program which should pass now:
----
# Create pool & thin & snap LVs
lvcreate -L5M -T vg/pool
lvcreate -V1M -T vg/pool -n thin
lvcreate -s vg/thin -n snap
----
#include "lvm2app.h"
int main(int argc, char *argv[])
{
lvm_t handle;
vg_t vg;
lv_t lv;
struct lvm_property_value v;
handle = lvm_init(NULL);
vg = lvm_vg_open(handle, argv[1], "r", 0);
lv = lvm_lv_from_name(vg, "snap");
v = lvm_lv_get_property(lv, "snap_percent");
lvm_vg_close(vg);
lvm_quit(handle);
return 0;
}
Marking verified (Sanity Only), as snapshot testing of thin volumes is pretty solid in the latest rpms. 2.6.32-348.el6.x86_64 lvm2-2.02.98-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 lvm2-libs-2.02.98-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 lvm2-cluster-2.02.98-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 udev-147-2.43.el6 BUILT: Thu Oct 11 05:59:38 CDT 2012 device-mapper-1.02.77-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 device-mapper-libs-1.02.77-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 device-mapper-event-1.02.77-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 device-mapper-event-libs-1.02.77-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 cmirror-2.02.98-6.el6 BUILT: Thu Dec 20 07:00:04 CST 2012 Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. http://rhn.redhat.com/errata/RHBA-2013-0501.html |