[Qemu-devel] [Bug 1753186] [NEW] qemu-nbd: always first snapshot loaded from VDI images with snapshots

[schmittlauch]

Public bug reported:

When mounting a virtual box disk image of a VM with snapshots, always
the state of the first snapshot is shown.

How to reproduce:
1. Create a new VirtualBox VM or use an existing one, while choosing VDI as the 
disk image format.
2. Create a snapshot of the VM.
3. Modify the file system from within the VM enough that differences to the 
snapshotted version are apparent.
4. Create another snapshot.
5. Shut down the VM.
6. Mount the partition from the disk image with `qemu-nbd -c /dev/nbd0 
/path/to/disk.vdi; mount /dev/nbd0pX /mnt`

Expected result: The mounted disk image shall represent the latest state of the 
VM
Actual result: The mounted disk image represents the VM state at the first 
snapshot

version information: qemu-nbd-2.11.1(openSUSE Tumbleweed)

** Affects: qemu
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1753186

Title:
  qemu-nbd: always first snapshot loaded from VDI images with snapshots

Status in QEMU:
  New

Bug description:
  When mounting a virtual box disk image of a VM with snapshots, always
  the state of the first snapshot is shown.

  How to reproduce:
  1. Create a new VirtualBox VM or use an existing one, while choosing VDI as 
the disk image format.
  2. Create a snapshot of the VM.
  3. Modify the file system from within the VM enough that differences to the 
snapshotted version are apparent.
  4. Create another snapshot.
  5. Shut down the VM.
  6. Mount the partition from the disk image with `qemu-nbd -c /dev/nbd0 
/path/to/disk.vdi; mount /dev/nbd0pX /mnt`

  Expected result: The mounted disk image shall represent the latest state of 
the VM
  Actual result: The mounted disk image represents the VM state at the first 
snapshot

  version information: qemu-nbd-2.11.1(openSUSE Tumbleweed)

To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1753186/+subscriptions