[qemu-xen master] Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging

[patchbot@xxxxxxx]

commit 0c1fd2f41f2f63cf3305d6d29d1acd0d960dbd36
Merge: b50dab9ecac442acc1b316e4749dae36a2fe7d61 
4a01e27ddcb5921efd68820d05d85ba71293fea6
Author:     Peter Maydell <peter.maydell@xxxxxxxxxx>
AuthorDate: Tue Jul 21 19:25:48 2020 +0100
Commit:     Peter Maydell <peter.maydell@xxxxxxxxxx>
CommitDate: Tue Jul 21 19:25:48 2020 +0100

    Merge remote-tracking branch 'remotes/kevin/tags/for-upstream' into staging
    
    Block layer patches:
    
    - file-posix: Handle `EINVAL` fallocate return value
    - qemu-img convert -n: Keep qcow2 v2 target sparse
    
    # gpg: Signature made Tue 21 Jul 2020 16:45:28 BST
    # gpg:                using RSA key DC3DEB159A9AF95D3D7456FE7F09B272C88F2FD6
    # gpg:                issuer "kwolf@xxxxxxxxxx"
    # gpg: Good signature from "Kevin Wolf <kwolf@xxxxxxxxxx>" [full]
    # Primary key fingerprint: DC3D EB15 9A9A F95D 3D74  56FE 7F09 B272 C88F 
2FD6
    
    * remotes/kevin/tags/for-upstream:
      iotests: Test sparseness for qemu-img convert -n
      qcow2: Implement v2 zero writes with discard if possible
      file-posix: Handle `EINVAL` fallocate return value
    
    Signed-off-by: Peter Maydell <peter.maydell@xxxxxxxxxx>

 block/file-posix.c         |  6 +++++-
 block/qcow2-cluster.c      |  9 ++++++++-
 tests/qemu-iotests/122     | 30 ++++++++++++++++++++++++++++++
 tests/qemu-iotests/122.out | 17 +++++++++++++++++
 4 files changed, 60 insertions(+), 2 deletions(-)
--
generated by git-patchbot for /home/xen/git/qemu-xen.git#master