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migration: Remove block migration

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The block migration has been considered obsolete since QEMU 8.2 in
favor of the more flexible storage migration provided by the
blockdev-mirror driver. Two releases have passed so now it's time to
remove it.

Deprecation commit 66db46ca83 ("migration: Deprecate block
migration").

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Fabiano Rosas 2024-04-30 11:27:35 -03:00
parent 18d154f575
commit eef0bae3a7
19 changed files with 26 additions and 1236 deletions
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61
qapi/migration.json
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@ -193,9 +193,6 @@
# @ram: @MigrationStats containing detailed migration status, only
# returned if status is 'active' or 'completed'(since 1.2)
#
# @disk: @MigrationStats containing detailed disk migration status,
# only returned if status is 'active' and it is a block migration
#
# @xbzrle-cache: @XBZRLECacheStats containing detailed XBZRLE
# migration statistics, only returned if XBZRLE feature is on and
# status is 'active' or 'completed' (since 1.2)
@ -262,17 +259,15 @@
#
# Features:
#
# @deprecated: Member @disk is deprecated because block migration is.
# Member @compression is deprecated because it is unreliable and
# untested. It is recommended to use multifd migration, which
# offers an alternative compression implementation that is
# reliable and tested.
# @deprecated: Member @compression is deprecated because it is
# unreliable and untested. It is recommended to use multifd
# migration, which offers an alternative compression
# implementation that is reliable and tested.
#
# Since: 0.14
##
{ 'struct': 'MigrationInfo',
'data': {'*status': 'MigrationStatus', '*ram': 'MigrationStats',
'*disk': { 'type': 'MigrationStats', 'features': [ 'deprecated' ] },
'*vfio': 'VfioStats',
'*xbzrle-cache': 'XBZRLECacheStats',
'*total-time': 'int',
@ -294,8 +289,7 @@
#
# Returns information about current migration process. If migration
# is active there will be another json-object with RAM migration
# status and if block migration is active another one with block
# migration status.
# status.
#
# Returns: @MigrationInfo
#
@ -333,7 +327,7 @@
# -> { "execute": "query-migrate" }
# <- { "return": { "status": "failed" } }
#
# 4. Migration is being performed and is not a block migration:
# 4. Migration is being performed:
#
# -> { "execute": "query-migrate" }
# <- {
@ -354,33 +348,7 @@
# }
# }
#
# 5. Migration is being performed and is a block migration:
#
# -> { "execute": "query-migrate" }
# <- {
# "return":{
# "status":"active",
# "total-time":12345,
# "setup-time":12345,
# "expected-downtime":12345,
# "ram":{
# "total":1057024,
# "remaining":1053304,
# "transferred":3720,
# "duplicate":123,
# "normal":123,
# "normal-bytes":123456,
# "dirty-sync-count":15
# },
# "disk":{
# "total":20971520,
# "remaining":20880384,
# "transferred":91136
# }
# }
# }
#
# 6. Migration is being performed and XBZRLE is active:
# 5. Migration is being performed and XBZRLE is active:
#
# -> { "execute": "query-migrate" }
# <- {
@ -460,11 +428,6 @@
# @release-ram: if enabled, qemu will free the migrated ram pages on
# the source during postcopy-ram migration. (since 2.9)
#
# @block: If enabled, QEMU will also migrate the contents of all block
# devices. Default is disabled. A possible alternative uses
# mirror jobs to a builtin NBD server on the destination, which
# offers more flexibility. (Since 2.10)
#
# @return-path: If enabled, migration will use the return path even
# for precopy. (since 2.10)
#
@ -528,11 +491,10 @@
#
# Features:
#
# @deprecated: Member @block is deprecated. Use blockdev-mirror with
# NBD instead. Member @compress is deprecated because it is
# unreliable and untested. It is recommended to use multifd
# migration, which offers an alternative compression
# implementation that is reliable and tested.
# @deprecated: Member @compress is deprecated because it is unreliable
# and untested. It is recommended to use multifd migration, which
# offers an alternative compression implementation that is
# reliable and tested.
#
# @unstable: Members @x-colo and @x-ignore-shared are experimental.
#
@ -544,7 +506,6 @@
'events', 'postcopy-ram',
{ 'name': 'x-colo', 'features': [ 'unstable' ] },
'release-ram',
{ 'name': 'block', 'features': [ 'deprecated' ] },
'return-path', 'pause-before-switchover', 'multifd',
'dirty-bitmaps', 'postcopy-blocktime', 'late-block-activate',
{ 'name': 'x-ignore-shared', 'features': [ 'unstable' ] },