Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20171023' into staging

migration/next for 20171023

# gpg: Signature made Mon 23 Oct 2017 17:05:14 BST
# gpg:                using RSA key 0xF487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration/20171023: (21 commits)
  migration: Improve migration thread error handling
  qapi: Fix grammar in x-multifd-page-count descriptions
  migration: add bitmap for received page
  migration: introduce qemu_ufd_copy_ioctl helper
  migration: postcopy_place_page factoring out
  migration: new ram_init_bitmaps()
  migration: clean up xbzrle cache init/destroy
  migration: provide ram_state_cleanup
  migration: provide ram_state_init()
  migration: pause-before-switchover for postcopy
  migration: allow cancel to unpause
  migrate: HMP migate_continue
  migration: migrate-continue
  migration: Wait for semaphore before completing migration
  migration: Add 'pre-switchover' and 'device' statuses
  migration: Add 'pause-before-switchover' capability
  migration: Make cache_init() take an error parameter
  migration: Move xbzrle cache resize error handling to xbzrle_cache_resize
  migration: Make cache size elements use the right types
  migratiom: Remove max_item_age parameter
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 31 insertions, 5 deletions

diff --git a/qapi/migration.json b/qapi/migration.json
index f8b365e3f5..6ae866e1aa 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -96,12 +96,18 @@
 # @colo: VM is in the process of fault tolerance, VM can not get into this
 #        state unless colo capability is enabled for migration. (since 2.8)
 #
+# @pre-switchover: Paused before device serialisation. (since 2.11)
+#
+# @device: During device serialisation when pause-before-switchover is enabled
+#        (since 2.11)
+#
 # Since: 2.3
 #
 ##
 { 'enum': 'MigrationStatus',
   'data': [ 'none', 'setup', 'cancelling', 'cancelled',
-            'active', 'postcopy-active', 'completed', 'failed', 'colo' ] }
+            'active', 'postcopy-active', 'completed', 'failed', 'colo',
+            'pre-switchover', 'device' ] }
 
 ##
 # @MigrationInfo:
@@ -341,6 +347,9 @@
 # @return-path: If enabled, migration will use the return path even
 #               for precopy. (since 2.10)
 #
+# @pause-before-switchover: Pause outgoing migration before serialising device
+#          state and before disabling block IO (since 2.11)
+#
 # @x-multifd: Use more than one fd for migration (since 2.11)
 #
 # Since: 1.2
@@ -348,7 +357,7 @@
 { 'enum': 'MigrationCapability',
   'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
            'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram',
-           'block', 'return-path', 'x-multifd' ] }
+           'block', 'return-path', 'pause-before-switchover', 'x-multifd' ] }
 
 ##
 # @MigrationCapabilityStatus:
@@ -471,7 +480,7 @@
 #                     number of sockets used for migration.  The
 #                     default value is 2 (since 2.11)
 #
-# @x-multifd-page-count: Number of pages sent together to a thread
+# @x-multifd-page-count: Number of pages sent together to a thread.
 #                        The default value is 16 (since 2.11)
 #
 # Since: 2.4
@@ -542,7 +551,7 @@
 #                     number of sockets used for migration.  The
 #                     default value is 2 (since 2.11)
 #
-# @x-multifd-page-count: Number of pages sent together to a thread
+# @x-multifd-page-count: Number of pages sent together to a thread.
 #                        The default value is 16 (since 2.11)
 #
 # Since: 2.4
@@ -638,7 +647,7 @@
 #                     number of sockets used for migration.
 #                     The default value is 2 (since 2.11)
 #
-# @x-multifd-page-count: Number of pages sent together to a thread
+# @x-multifd-page-count: Number of pages sent together to a thread.
 #                        The default value is 16 (since 2.11)
 #
 # Since: 2.4
@@ -868,6 +877,23 @@
 { 'command': 'migrate_cancel' }
 
 ##
+# @migrate-continue:
+#
+# Continue migration when it's in a paused state.
+#
+# @state: The state the migration is currently expected to be in
+#
+# Returns: nothing on success
+# Since: 2.11
+# Example:
+#
+# -> { "execute": "migrate-continue" , "arguments":
+#      { "state": "pre-switchover" } }
+# <- { "return": {} }
+##
+{ 'command': 'migrate-continue', 'data': {'state': 'MigrationStatus'} }
+
+##
 # @migrate_set_downtime:
 #
 # Set maximum tolerated downtime for migration.