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migration: Deprecate block migration

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It is obsolete.  It is better to use driver-mirror with NBD instead.

CC: Kevin Wolf <kwolf@redhat.com>
CC: Eric Blake <eblake@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Hanna Czenczek <hreitz@redhat.com>

Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231018115513.2163-5-quintela@redhat.com>
This commit is contained in:
Juan Quintela
2023-10-18 13:55:12 +02:00
parent 8846b5bfca
commit 66db46ca83
4 changed files with 45 additions and 6 deletions
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9
migration/options.c
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@ -12,6 +12,7 @@
*/
#include "qemu/osdep.h"
#include "qemu/error-report.h"
#include "exec/target_page.h"
#include "qapi/clone-visitor.h"
#include "qapi/error.h"
@ -473,10 +474,14 @@ bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
if (new_caps[MIGRATION_CAPABILITY_BLOCK]) {
error_setg(errp, "QEMU compiled without old-style (blk/-b, inc/-i) "
"block migration");
error_append_hint(errp, "Use drive_mirror+NBD instead.\n");
error_append_hint(errp, "Use blockdev-mirror with NBD instead.\n");
return false;
}
#endif
if (new_caps[MIGRATION_CAPABILITY_BLOCK]) {
warn_report("block migration is deprecated;"
" use blockdev-mirror with NBD instead");
}
#ifndef CONFIG_REPLICATION
if (new_caps[MIGRATION_CAPABILITY_X_COLO]) {
@ -1400,6 +1405,8 @@ static void migrate_params_apply(MigrateSetParameters *params, Error **errp)
}
if (params->has_block_incremental) {
warn_report("block migration is deprecated;"
" use blockdev-mirror with NBD instead");
s->parameters.block_incremental = params->block_incremental;
}
if (params->has_multifd_channels) {