3 Commits

Author	SHA1	Message	Date
Peter Rajnoha	756bcabbfe	activation: fix autoactivation to not trigger on each PV change ... Before, the pvscan --cache -aay was called on each ADD and CHANGE uevent (for a device that is not a device-mapper device) and each CHANGE event (for a PV that is a device-mapper device). This causes troubles with autoactivation in some cases as CHANGE event may originate from using the OPTION+="watch" udev rule that is defined in 60-persistent-storage.rules (part of the rules provided by udev directly) and it's used for all block devices (except fd*|mtd*|nbd*|gnbd*|btibm*|dm-*|md* devices). For example, the following sequence incorrectly activates the rest of LVs in a VG if one of the LVs in the VG is being removed: [root@rhel6-a ~]# pvcreate /dev/sda Physical volume "/dev/sda" successfully created [root@rhel6-a ~]# vgcreate vg /dev/sda Volume group "vg" successfully created [root@rhel6-a ~]# lvcreate -l1 vg Logical volume "lvol0" created [root@rhel6-a ~]# lvcreate -l1 vg Logical volume "lvol1" created [root@rhel6-a ~]# vgchange -an vg 0 logical volume(s) in volume group "vg" now active [root@rhel6-a ~]# lvs LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert lvol0 vg -wi------ 4.00m lvol1 vg -wi------ 4.00m [root@rhel6-a ~]# lvremove -ff vg/lvol1 Logical volume "lvol1" successfully removed [root@rhel6-a ~]# lvs LV VG Attr LSize Pool Origin Data% Move Log Cpy%Sync Convert lvol0 vg -wi-a---- 4.00m ...so the vg was deactivated, then lvol1 removed, and we end up with lvol1 removed (which is ok) BUT with lvol0 activated (which is wrong)!!! This is because after lvol1 removal, we need to write metadata to the underlying device /dev/sda and that causes the CHANGE event to be generated (because of the WATCH udev rule set on this device) and this causes the pvscan --cache -aay to be reevaluated. We have to limit this and call pvscan --cache -aay to autoactivate VGs/LVs only in these cases: --> if the *PV is not a dm device*, scan only after proper device addition (ADD event) and not with any other changes (CHANGE event) --> if the *PV is a dm device*, scan only after proper mapping activation (CHANGE event + the underlying PV in a state "just activated")	2012-12-21 10:34:48 +01:00
Peter Rajnoha	d2df8dddc8	pvscan: add --activate ay option (autoactivate) ... Define auto_activation_handler that activates VGs/LVs automatically based on the activation/auto_activation_volume_list (activating all volumes by default if the list is not defined). The autoactivation is done within the pvscan call in 69-dm-lvmetad.rules that watches for udev events (device appearance/removal). For now, this works for non-clustered and complete VGs only.	2012-06-28 09:44:03 -04:00
Peter Rajnoha	e6f8d86409	udev: udev rules cleanup ... Remove executable path detection in udev rules and use sbindir that is configured, but still provide the original functionality by means of 'configure --enable-udev-rule-exec-detection'. Normally, the exec path for the tools called in udev rules should not differ from the sbindir used, however, there are cases this is necessary. For example different environments could be assembled in a way that these path differ for some reason (distribution installer, initrd ...). This functionality is kept for compatibility only. Any environment moving the binaries around and using different paths should be fixed eventually!	2012-06-27 12:11:56 +02:00