Dne 4.6.2015 v 12:02 M.H. Tsai napsal(a):
Hi All, I found that there's a potential bug in libdm when I try to swap sub volume's name. By executing the following code, the function dm_tree_activate_children() will go into infinite loop since that _rename_conflict_exists() still reports "resolvable=1" in this case. logical_volume *parent = ...; logical_volume *child1 = seg_lv(parent, 0); logical_volume *child2 = seg_lv(parent, 1); char const *tmp = child1->name; child1->name = child2->name; child2->name = tmp; resume_lv(cmd, parent); Although this scenario might not happen through command-line operation, some programmers might need this feature. I think that this issue could be resolve in libdm by assigning a temporary name, as the following patch does. Is it safe to do this?
Please provide sequence of 'ioctl' where you think there is a bug. (or disclose your code using libdm). There are many rules behind the work with subLV. (e.g. you can't operate on subLV without operating through top level LV (and yes some parts of lvm2 code are still buggy in this regard...)) Regards Zdenek _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/
