migration: Move migrate_caps_check() to options.c

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>

1 files changed, 0 insertions, 190 deletions

diff --git a/migration/migration.c b/migration/migration.c
index b03c4aa650..431e3db278 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -136,39 +136,6 @@ enum mig_rp_message_type {
     MIG_RP_MSG_MAX
 };
 
-/* Migration capabilities set */
-struct MigrateCapsSet {
-    int size;                       /* Capability set size */
-    MigrationCapability caps[];     /* Variadic array of capabilities */
-};
-typedef struct MigrateCapsSet MigrateCapsSet;
-
-/* Define and initialize MigrateCapsSet */
-#define INITIALIZE_MIGRATE_CAPS_SET(_name, ...)   \
-    MigrateCapsSet _name = {    \
-        .size = sizeof((int []) { __VA_ARGS__ }) / sizeof(int), \
-        .caps = { __VA_ARGS__ } \
-    }
-
-/* Background-snapshot compatibility check list */
-static const
-INITIALIZE_MIGRATE_CAPS_SET(check_caps_background_snapshot,
-    MIGRATION_CAPABILITY_POSTCOPY_RAM,
-    MIGRATION_CAPABILITY_DIRTY_BITMAPS,
-    MIGRATION_CAPABILITY_POSTCOPY_BLOCKTIME,
-    MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE,
-    MIGRATION_CAPABILITY_RETURN_PATH,
-    MIGRATION_CAPABILITY_MULTIFD,
-    MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER,
-    MIGRATION_CAPABILITY_AUTO_CONVERGE,
-    MIGRATION_CAPABILITY_RELEASE_RAM,
-    MIGRATION_CAPABILITY_RDMA_PIN_ALL,
-    MIGRATION_CAPABILITY_COMPRESS,
-    MIGRATION_CAPABILITY_XBZRLE,
-    MIGRATION_CAPABILITY_X_COLO,
-    MIGRATION_CAPABILITY_VALIDATE_UUID,
-    MIGRATION_CAPABILITY_ZERO_COPY_SEND);
-
 /* When we add fault tolerance, we could have several
    migrations at once.  For now we don't need to add
    dynamic creation of migration */
@@ -1235,163 +1202,6 @@ static void fill_source_migration_info(MigrationInfo *info)
     info->status = state;
 }
 
-typedef enum WriteTrackingSupport {
-    WT_SUPPORT_UNKNOWN = 0,
-    WT_SUPPORT_ABSENT,
-    WT_SUPPORT_AVAILABLE,
-    WT_SUPPORT_COMPATIBLE
-} WriteTrackingSupport;
-
-static
-WriteTrackingSupport migrate_query_write_tracking(void)
-{
-    /* Check if kernel supports required UFFD features */
-    if (!ram_write_tracking_available()) {
-        return WT_SUPPORT_ABSENT;
-    }
-    /*
-     * Check if current memory configuration is
-     * compatible with required UFFD features.
-     */
-    if (!ram_write_tracking_compatible()) {
-        return WT_SUPPORT_AVAILABLE;
-    }
-
-    return WT_SUPPORT_COMPATIBLE;
-}
-
-/**
- * @migration_caps_check - check capability compatibility
- *
- * @old_caps: old capability list
- * @new_caps: new capability list
- * @errp: set *errp if the check failed, with reason
- *
- * Returns true if check passed, otherwise false.
- */
-static bool migrate_caps_check(bool *old_caps, bool *new_caps, Error **errp)
-{
-    MigrationIncomingState *mis = migration_incoming_get_current();
-
-#ifndef CONFIG_LIVE_BLOCK_MIGRATION
-    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");
-        return false;
-    }
-#endif
-
-#ifndef CONFIG_REPLICATION
-    if (new_caps[MIGRATION_CAPABILITY_X_COLO]) {
-        error_setg(errp, "QEMU compiled without replication module"
-                   " can't enable COLO");
-        error_append_hint(errp, "Please enable replication before COLO.\n");
-        return false;
-    }
-#endif
-
-    if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
-        /* This check is reasonably expensive, so only when it's being
-         * set the first time, also it's only the destination that needs
-         * special support.
-         */
-        if (!old_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM] &&
-            runstate_check(RUN_STATE_INMIGRATE) &&
-            !postcopy_ram_supported_by_host(mis)) {
-            /* postcopy_ram_supported_by_host will have emitted a more
-             * detailed message
-             */
-            error_setg(errp, "Postcopy is not supported");
-            return false;
-        }
-
-        if (new_caps[MIGRATION_CAPABILITY_X_IGNORE_SHARED]) {
-            error_setg(errp, "Postcopy is not compatible with ignore-shared");
-            return false;
-        }
-    }
-
-    if (new_caps[MIGRATION_CAPABILITY_BACKGROUND_SNAPSHOT]) {
-        WriteTrackingSupport wt_support;
-        int idx;
-        /*
-         * Check if 'background-snapshot' capability is supported by
-         * host kernel and compatible with guest memory configuration.
-         */
-        wt_support = migrate_query_write_tracking();
-        if (wt_support < WT_SUPPORT_AVAILABLE) {
-            error_setg(errp, "Background-snapshot is not supported by host kernel");
-            return false;
-        }
-        if (wt_support < WT_SUPPORT_COMPATIBLE) {
-            error_setg(errp, "Background-snapshot is not compatible "
-                    "with guest memory configuration");
-            return false;
-        }
-
-        /*
-         * Check if there are any migration capabilities
-         * incompatible with 'background-snapshot'.
-         */
-        for (idx = 0; idx < check_caps_background_snapshot.size; idx++) {
-            int incomp_cap = check_caps_background_snapshot.caps[idx];
-            if (new_caps[incomp_cap]) {
-                error_setg(errp,
-                        "Background-snapshot is not compatible with %s",
-                        MigrationCapability_str(incomp_cap));
-                return false;
-            }
-        }
-    }
-
-#ifdef CONFIG_LINUX
-    if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND] &&
-        (!new_caps[MIGRATION_CAPABILITY_MULTIFD] ||
-         new_caps[MIGRATION_CAPABILITY_COMPRESS] ||
-         new_caps[MIGRATION_CAPABILITY_XBZRLE] ||
-         migrate_multifd_compression() ||
-         migrate_use_tls())) {
-        error_setg(errp,
-                   "Zero copy only available for non-compressed non-TLS multifd migration");
-        return false;
-    }
-#else
-    if (new_caps[MIGRATION_CAPABILITY_ZERO_COPY_SEND]) {
-        error_setg(errp,
-                   "Zero copy currently only available on Linux");
-        return false;
-    }
-#endif
-
-    if (new_caps[MIGRATION_CAPABILITY_POSTCOPY_PREEMPT]) {
-        if (!new_caps[MIGRATION_CAPABILITY_POSTCOPY_RAM]) {
-            error_setg(errp, "Postcopy preempt requires postcopy-ram");
-            return false;
-        }
-
-        /*
-         * Preempt mode requires urgent pages to be sent in separate
-         * channel, OTOH compression logic will disorder all pages into
-         * different compression channels, which is not compatible with the
-         * preempt assumptions on channel assignments.
-         */
-        if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
-            error_setg(errp, "Postcopy preempt not compatible with compress");
-            return false;
-        }
-    }
-
-    if (new_caps[MIGRATION_CAPABILITY_MULTIFD]) {
-        if (new_caps[MIGRATION_CAPABILITY_COMPRESS]) {
-            error_setg(errp, "Multifd is not compatible with compress");
-            return false;
-        }
-    }
-
-    return true;
-}
-
 static void fill_destination_migration_info(MigrationInfo *info)
 {
     MigrationIncomingState *mis = migration_incoming_get_current();