Patchwork [RFC,15/16] ASN.1 schema for new migration format

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Submitter Dave Gilbert
Date March 25, 2014, 8:17 p.m.
Message ID <1395778647-30925-16-git-send-email-dgilbert@redhat.com>
Download mbox | patch
Permalink /patch/333719/
State New
Headers show

Comments

Dave Gilbert - March 25, 2014, 8:17 p.m.
From: "Dr. David Alan Gilbert" <dgilbert@redhat.com>

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
---
 docs/specs/migration.schema | 113 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 113 insertions(+)
 create mode 100644 docs/specs/migration.schema

Patch

diff --git a/docs/specs/migration.schema b/docs/specs/migration.schema
new file mode 100644
index 0000000..d433127
--- /dev/null
+++ b/docs/specs/migration.schema
@@ -0,0 +1,113 @@ 
+-- Copyright 2014 Red Hat, Inc. and/or its affiliates
+--
+-- Authors:
+--   Dave Gilbert <dgilbert@redhat.com>
+--
+-- This work is licensed under the terms of the GNU LGPL, version 2 or later.
+-- See the COPYING.LIB file in the top-level directory.
+
+Qemu {}
+DEFINITIONS IMPLICIT TAGS ::=
+BEGIN
+
+-- Some basic types used in multiple places --
+QemuString ::= UTF8String (SIZE (1..255))
+
+-- TODO: 4096 is actually page size whatever that is
+FullPage ::= OCTET STRING (SIZE (4096))
+
+-- Types for specific devices --
+
+VMState-CPU-Common ::= [ APPLICATION 20000 ] SEQUENCE {
+  halted            INTEGER,
+  interrupt-request INTEGER
+}
+
+--------------------------------
+
+RAMBlockID ::= SEQUENCE {
+  name   QemuString,
+  len    INTEGER
+}
+
+RAMSecEntry ::= [ APPLICATION 8914 ] SEQUENCE {
+  addr         INTEGER,   -- Address or offset or size
+  flags        INTEGER,   -- maybe more explicit type?
+  name         QemuString OPTIONAL,
+
+  body         CHOICE {
+    bl         SEQUENCE OF RAMBlockID,
+    compr      INTEGER (0..255), -- Page filled with this value
+    page       FullPage
+    -- TODO xbzrle --
+  }
+}
+
+RAMSecList ::= [ APPLICATION 9810 ] SEQUENCE OF RAMSecEntry
+
+SubSection ::= [ APPLICATION 10707 ] SEQUENCE {
+  name         QemuString,
+  versionid    INTEGER,
+
+  contents     SEQUENCE OF VMStateEntries
+}
+
+SubSecList ::= [ APPLICATION 10700 ] SEQUENCE OF SubSection
+
+VMStateEntries ::= CHOICE {
+  -- Hmm need to think more --
+  array       SEQUENCE OF VMStateEntries,
+  bool        BOOLEAN,
+  int         INTEGER,
+  oldblob     OCTET STRING,
+  subsecl     SubSecList
+}
+
+VMState ::= CHOICE {
+  SEQUENCE OF VMStateEntries,
+
+  VMState-CPU-Common
+}
+
+-- Restrict to unsigned?
+SectionID ::= INTEGER
+
+SecFull ::= [ APPLICATION 2003 ] SEQUENCE {
+  name         QemuString,
+  sectionid    SectionID,
+  instanceid   INTEGER,
+  versionid    INTEGER,
+
+  contents     CHOICE {
+    ramsec     RAMSecList,
+    -- TODO other iterator initial stuff --
+    vmstate    VMState,
+    oldblob  OCTET STRING
+  }
+}
+
+SecMin ::= [ APPLICATION 211 ] SEQUENCE {
+  sectionid   SectionID,
+
+  contents     CHOICE {
+    ramsec     RAMSecList
+    -- TODO other iterator general/end stuff --
+  }
+}
+
+Sections ::= CHOICE {
+  full    SecFull,
+  min     SecMin
+}
+
+-- The whole file --
+-- Application tag used to get first 32bits of file
+-- to come out as 7f cd c5 51  - the 51 is Q
+-- the c5 and cd being E,M but with the top bit set
+-- which BER requires
+QemuFile ::= [ APPLICATION 1270481 ] SEQUENCE {
+  version INTEGER (3),
+  top     SEQUENCE OF Sections
+}
+
+END