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* qcow2_format.py: support dumping metadata in JSON formatAndrey Shinkevich2020-08-211-0/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Implementation of dumping QCOW2 image metadata. The sample output: { "Header_extensions": [ { "name": "Feature table", "magic": 1745090647, "length": 192, "data_str": "<binary>" }, { "name": "Bitmaps", "magic": 595929205, "length": 24, "data": { "nb_bitmaps": 2, "reserved32": 0, "bitmap_directory_size": 64, "bitmap_directory_offset": 1048576, "bitmap_directory": [ { "name": "bitmap-1", "bitmap_table_offset": 589824, "bitmap_table_size": 1, "flags": 2, "type": 1, "granularity_bits": 15, "name_size": 8, "extra_data_size": 0, "bitmap_table": [ { "type": "serialized", "offset": 655360 }, ... Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-11-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: collect fields to dump in JSON formatAndrey Shinkevich2020-08-211-0/+36
| | | | | | | | | | | | | | As __dict__ is being extended with class members we do not want to print, add the to_json() method to classes that returns a json-dumpable object with desired fields and their values. Extend it in subclass when necessary to print the final dictionary in the JSON output which follows. Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <1596742557-320265-10-git-send-email-andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2.py: Introduce '-j' key to dump in JSON formatAndrey Shinkevich2020-08-211-2/+2
| | | | | | | | | | | Add the command key to the qcow2.py arguments list to dump QCOW2 metadata in JSON format. Here is the suggested way to do that. The implementation of the dump in JSON format is in the patch that follows. Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-9-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: Dump bitmap table serialized entriesAndrey Shinkevich2020-08-211-0/+50
| | | | | | | | | | | | | | | | Add bitmap table information to the QCOW2 metadata dump. Bitmap name bitmap-1 ... Bitmap table type size offset 0 serialized 65536 10092544 1 all-zeroes 0 0 2 all-zeroes 0 0 Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-8-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: pass cluster size to substructuresAndrey Shinkevich2020-08-211-6/+11
| | | | | | | | | | | The cluster size of an image is the QcowHeader class member and may be obtained by dependent extension structures such as Qcow2BitmapExt for further bitmap table details print. Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-7-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: Dump bitmap directory informationAndrey Shinkevich2020-08-211-0/+47
| | | | | | | | | | | | | | | | | | | | | | Read and dump entries from the bitmap directory of QCOW2 image. Header extension: magic 0x23852875 (Bitmaps) ... Bitmap name bitmap-1 bitmap_table_offset 0xf0000 bitmap_table_size 1 flags 0x2 (['auto']) type 1 granularity_bits 16 name_size 8 extra_data_size 0 Suggested-by: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-6-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: dump bitmap flags in human readable way.Andrey Shinkevich2020-08-211-0/+16
| | | | | | | | | | Introduce the class BitmapFlags that parses a bitmap flags mask. Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-5-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: change Qcow2BitmapExt initialization methodAndrey Shinkevich2020-08-211-14/+22
| | | | | | | | | | | | | | | There are two ways to initialize a class derived from Qcow2Struct: 1. Pass a block of binary data to the constructor. 2. Pass the file descriptor to allow reading the file from constructor. Let's change the Qcow2BitmapExt initialization method from 1 to 2 to support a scattered reading in the initialization chain. The implementation comes with the patch that follows. Suggested-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-4-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: make printable data an extension class memberAndrey Shinkevich2020-08-211-6/+8
| | | | | | | | | | | Let us differ binary data type from string one for the extension data variable and keep the string as the QcowHeaderExtension class member. Signed-off-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <1596742557-320265-3-git-send-email-andrey.shinkevich@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* iotests: Add copyright line in qcow2.pyEric Blake2020-06-171-0/+1
| | | | | | | | | | | | | | | | | | | | | | | The file qcow2.py was originally contributed in 2012 by Kevin Wolf, but was not given traditional boilerplate headers at the time. The missing license was just rectified (commit 16306a7b39) using the project-default GPLv2+, but as Vladimir is not at Red Hat, he did not add a Copyright line. All earlier contributions have come from CC'd authors, where all but Stefan used a Red Hat address at the time of the contribution, and that copyright carries over to the split to qcow2_format.py (d5262c7124). CC: Kevin Wolf <kwolf@redhat.com> CC: Stefan Hajnoczi <stefanha@redhat.com> CC: Eduardo Habkost <ehabkost@redhat.com> CC: Max Reitz <mreitz@redhat.com> CC: Philippe Mathieu-Daudé <philmd@redhat.com> CC: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com> Message-Id: <20200609205944.3549240-1-eblake@redhat.com> Acked-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
* qcow2_format.py: dump bitmaps header extensionVladimir Sementsov-Ogievskiy2020-06-091-9/+33
| | | | | | | | | | | | | Add class for bitmap extension and dump its fields. Further work is to dump bitmap directory. Test new functionality inside 291 iotest. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-14-vsementsov@virtuozzo.com> [eblake: fix iotest output] Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2: QcowHeaderExtension print names for extension magicsVladimir Sementsov-Ogievskiy2020-06-091-1/+16
| | | | | | | | Suggested-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200606081806.23897-13-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format: refactor QcowHeaderExtension as a subclass of Qcow2StructVladimir Sementsov-Ogievskiy2020-06-091-16/+37
| | | | | | | | | | | Only two fields we can parse by generic code, but that is better than nothing. Keep further refactoring of variable-length fields for another day. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-12-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: QcowHeaderExtension: add dump methodVladimir Sementsov-Ogievskiy2020-06-091-10/+12
| | | | | | | | | | Obviously, for-loop body in dump_extensions should be the dump method of extension. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-11-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: add field-formatting classVladimir Sementsov-Ogievskiy2020-06-091-10/+25
| | | | | | | | | | Allow formatter class in structure definition instead of hacking with 'mask'. This will simplify further introduction of new formatters. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-10-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: separate generic functionality of structure classesVladimir Sementsov-Ogievskiy2020-06-091-35/+66
| | | | | | | | | | | We are going to introduce more Qcow2 structure types, defined like QcowHeader. Move generic functionality into base class to be reused for further structure classes. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-9-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: use strings to specify c-type of struct fieldsVladimir Sementsov-Ogievskiy2020-06-091-22/+28
| | | | | | | | | | | | | | | We are going to move field-parsing to super-class, this will be simpler with simple string specifiers instead of variables. For some reason, python doesn't allow the definition of ctypes variable in the class alongside fields: it would not be available then for use by the 'for' operator. Don't worry: ctypes will be moved to metaclass soon. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-8-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: use modern string formattingVladimir Sementsov-Ogievskiy2020-06-091-27/+27
| | | | | | | | | | | Use .format and f-strings instead of old %style. Also, the file uses both '' and "" quotes, for consistency let's use '', except for cases when we need '' inside the string (use "" to avoid extra escaping). Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-7-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: use tuples instead of lists for fieldsVladimir Sementsov-Ogievskiy2020-06-091-20/+20
| | | | | | | | | No need in lists: it's a constant variable. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-6-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2_format.py: drop new line printing at end of dump()Vladimir Sementsov-Ogievskiy2020-06-091-1/+0Star
| | | | | | | | | | This will simplify further conversion. To compensate, print this empty line directly in cmd_dump_header(). Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Andrey Shinkevich <andrey.shinkevich@virtuozzo.com> Message-Id: <20200606081806.23897-5-vsementsov@virtuozzo.com> Signed-off-by: Eric Blake <eblake@redhat.com>
* qcow2.py: move qcow2 format classes to separate moduleVladimir Sementsov-Ogievskiy2020-06-091-0/+173
We are going to enhance qcow2 format parsing by adding more structure classes. Let's split format parsing from utility code. Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Message-Id: <20200606081806.23897-4-vsementsov@virtuozzo.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Eric Blake <eblake@redhat.com>
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