[PATCH 5/6] migration: analyze-migration script changed

[Nikita Lapshin]

This script is used for RAM capabilities test. But it cannot work
in case of no vm description in migration stream.
So new flag is added to allow work this script with ram-only
migration stream.

Signed-off-by: Nikita Lapshin <nikita.lapshin@virtuozzo.com>
---
 scripts/analyze-migration.py | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/scripts/analyze-migration.py b/scripts/analyze-migration.py
index b82a1b0c58..80077a09bc 100755
--- a/scripts/analyze-migration.py
+++ b/scripts/analyze-migration.py
@@ -495,7 +495,7 @@ def __init__(self, filename):
         self.filename = filename
         self.vmsd_desc = None
 
-    def read(self, desc_only = False, dump_memory = False, write_memory = 
False):
+    def read(self, ram_only, desc_only = False, dump_memory = False, 
write_memory = False):
         # Read in the whole file
         file = MigrationFile(self.filename)
 
@@ -509,7 +509,8 @@ def read(self, desc_only = False, dump_memory = False, 
write_memory = False):
         if data != self.QEMU_VM_FILE_VERSION:
             raise Exception("Invalid version number %d" % data)
 
-        self.load_vmsd_json(file)
+        if not ram_only:
+            self.load_vmsd_json(file)
 
         # Read sections
         self.sections = collections.OrderedDict()
@@ -518,7 +519,10 @@ def read(self, desc_only = False, dump_memory = False, 
write_memory = False):
             return
 
         ramargs = {}
-        ramargs['page_size'] = self.vmsd_desc['page_size']
+        if ram_only:
+            ramargs['page_size'] = 4096
+        else:
+            ramargs['page_size'] = self.vmsd_desc['page_size']
         ramargs['dump_memory'] = dump_memory
         ramargs['write_memory'] = write_memory
         self.section_classes[('ram',0)][1] = ramargs
@@ -579,6 +583,7 @@ def default(self, o):
 parser.add_argument("-m", "--memory", help='dump RAM contents as well', 
action='store_true')
 parser.add_argument("-d", "--dump", help='what to dump ("state" or "desc")', 
default='state')
 parser.add_argument("-x", "--extract", help='extract contents into individual 
files', action='store_true')
+parser.add_argument("--ram-only", help='parse migration dump containing only 
RAM', action='store_true')
 args = parser.parse_args()
 
 jsonenc = JSONEncoder(indent=4, separators=(',', ': '))
@@ -586,14 +591,14 @@ def default(self, o):
 if args.extract:
     dump = MigrationDump(args.file)
 
-    dump.read(desc_only = True)
+    dump.read(desc_only = True, ram_only = args.ram_only)
     print("desc.json")
     f = open("desc.json", "w")
     f.truncate()
     f.write(jsonenc.encode(dump.vmsd_desc))
     f.close()
 
-    dump.read(write_memory = True)
+    dump.read(write_memory = True, ram_only = args.ram_only)
     dict = dump.getDict()
     print("state.json")
     f = open("state.json", "w")
@@ -602,12 +607,12 @@ def default(self, o):
     f.close()
 elif args.dump == "state":
     dump = MigrationDump(args.file)
-    dump.read(dump_memory = args.memory)
+    dump.read(dump_memory = args.memory, ram_only = args.ram_only)
     dict = dump.getDict()
     print(jsonenc.encode(dict))
 elif args.dump == "desc":
     dump = MigrationDump(args.file)
-    dump.read(desc_only = True)
+    dump.read(desc_only = True, ram_only = args.ram_only)
     print(jsonenc.encode(dump.vmsd_desc))
 else:
     raise Exception("Please specify either -x, -d state or -d desc")
-- 
2.27.0