a0cd0f9cec
New kernel has stricter checks on tmpfs with stick-bit on directories, so some commands (i.e. proxmox-tape changer status) fails when executed as root, because permission checks fails when locking the drive. This patch move the drive locks to /run/proxmox-backup/drive-lock. Note: This is incompatible to old locking mechmanism, so users may not run tape backups during update (or running backup can fail).