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Daniel P. Berrange 0a12f6f80e qcow2: report encryption specific image information 
Currently 'qemu-img info' reports a simple "encrypted: yes"
field. This is not very useful now that qcow2 can support
multiple encryption formats. Users want to know which format
is in use and some data related to it.

Wire up usage of the qcrypto_block_get_info() method so that
'qemu-img info' can report about the encryption format
and parameters in use

  $ qemu-img create \
      --object secret,id=sec0,data=123456 \
      -o encrypt.format=luks,encrypt.key-secret=sec0 \
      -f qcow2 demo.qcow2 1G
  Formatting 'demo.qcow2', fmt=qcow2 size=1073741824 \
  encryption=off encrypt.format=luks encrypt.key-secret=sec0 \
  cluster_size=65536 lazy_refcounts=off refcount_bits=16

  $ qemu-img info demo.qcow2
  image: demo.qcow2
  file format: qcow2
  virtual size: 1.0G (1073741824 bytes)
  disk size: 480K
  encrypted: yes
  cluster_size: 65536
  Format specific information:
      compat: 1.1
      lazy refcounts: false
      refcount bits: 16
      encrypt:
          ivgen alg: plain64
          hash alg: sha256
          cipher alg: aes-256
          uuid: 3fa930c4-58c8-4ef7-b3c5-314bb5af21f3
          format: luks
          cipher mode: xts
          slots:
              [0]:
                  active: true
                  iters: 1839058
                  key offset: 4096
                  stripes: 4000
              [1]:
                  active: false
                  key offset: 262144
              [2]:
                  active: false
                  key offset: 520192
              [3]:
                  active: false
                  key offset: 778240
              [4]:
                  active: false
                  key offset: 1036288
              [5]:
                  active: false
                  key offset: 1294336
              [6]:
                  active: false
                  key offset: 1552384
              [7]:
                  active: false
                  key offset: 1810432
          payload offset: 2068480
          master key iters: 438487
      corrupt: false

With the legacy "AES" encryption we just report the format
name

  $ qemu-img create \
      --object secret,id=sec0,data=123456 \
      -o encrypt.format=aes,encrypt.key-secret=sec0 \
      -f qcow2 demo.qcow2 1G
  Formatting 'demo.qcow2', fmt=qcow2 size=1073741824 \
  encryption=off encrypt.format=aes encrypt.key-secret=sec0 \
  cluster_size=65536 lazy_refcounts=off refcount_bits=16

  $ ./qemu-img info demo.qcow2
  image: demo.qcow2
  file format: qcow2
  virtual size: 1.0G (1073741824 bytes)
  disk size: 196K
  encrypted: yes
  cluster_size: 65536
  Format specific information:
      compat: 1.1
      lazy refcounts: false
      refcount bits: 16
      encrypt:
          format: aes
      corrupt: false

Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 20170623162419.26068-20-berrange@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
 		2017-07-11 17:44:57 +02:00
..
Makefile.objs qapi: rename *qmp-*-visitor* to *qobject-*-visitor* 2016-10-25 16:25:48 +02:00
block-core.json qcow2: report encryption specific image information 2017-07-11 17:44:57 +02:00
block.json qapi: Fix some QMP documentation regressions 2017-06-04 18:42:55 +03:00
common.json block: remove all encryption handling APIs 2017-07-11 17:44:56 +02:00
crypto.json qapi: The #optional tag is redundant, drop 2017-03-16 07:13:02 +01:00
event.json shutdown: Expose bool cause in SHUTDOWN and RESET events 2017-05-23 13:28:17 +02:00
introspect.json qapi: The #optional tag is redundant, drop 2017-03-16 07:13:02 +01:00
opts-visitor.c qapi: Fix QemuOpts visitor regression on unvisited input 2017-03-22 19:24:34 +01:00
qapi-clone-visitor.c qapi: Remove visit_start_alternate() parameter promote_int 2017-06-20 14:31:31 +02:00
qapi-dealloc-visitor.c qapi: Remove visit_start_alternate() parameter promote_int 2017-06-20 14:31:31 +02:00
qapi-util.c qapi: New parse_qapi_name() 2017-03-07 16:07:47 +01:00
qapi-visit-core.c qapi: Remove visit_start_alternate() parameter promote_int 2017-06-20 14:31:31 +02:00
qmp-dispatch.c qmp: Improve QMP dispatch error messages 2017-05-09 09:14:40 +02:00
qmp-event.c qobject: Use simpler QDict/QList scalar insertion macros 2017-05-09 09:13:51 +02:00
qmp-registry.c qapi: Support multiple command registries per program 2017-03-05 09:12:25 +01:00
qobject-input-visitor.c qapi: update the qobject visitor to use QNUM_U64 2017-06-20 14:31:31 +02:00
qobject-output-visitor.c qapi: update the qobject visitor to use QNUM_U64 2017-06-20 14:31:31 +02:00
rocker.json qapi: The #optional tag is redundant, drop 2017-03-16 07:13:02 +01:00
string-input-visitor.c qapi: add explicit null to string input and output visitors 2017-06-30 14:03:31 +10:00
string-output-visitor.c qapi: add explicit null to string input and output visitors 2017-06-30 14:03:31 +10:00
trace-events qapi: Remove visit_start_alternate() parameter promote_int 2017-06-20 14:31:31 +02:00
trace.json qapi: The #optional tag is redundant, drop 2017-03-16 07:13:02 +01:00