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block: add ability to specify list of blockdevs during snapshot

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When running snapshot operations, there are various rules for which
blockdevs are included/excluded. While this provides reasonable default
behaviour, there are scenarios that are not well handled by the default
logic. Some of the conditions do not have a single correct answer.

Thus there needs to be a way for the mgmt app to provide an explicit
list of blockdevs to perform snapshots across. This can be achieved
by passing a list of node names that should be used.

Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20210204124834.774401-5-berrange@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Daniel P. Berrangé 2021-02-04 12:48:26 +00:00 • committed by Dr. David Alan Gilbert
parent f61fe11aa6
commit cf3a74c94f
6 changed files with 159 additions and 63 deletions
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4
block/monitor/block-hmp-cmds.c
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@ -902,7 +902,7 @@ void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
SnapshotEntry *snapshot_entry;
Error *err = NULL;
bs = bdrv_all_find_vmstate_bs(&err);
bs = bdrv_all_find_vmstate_bs(false, NULL, &err);
if (!bs) {
error_report_err(err);
return;
@ -954,7 +954,7 @@ void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
total = 0;
for (i = 0; i < nb_sns; i++) {
SnapshotEntry *next_sn;
if (bdrv_all_find_snapshot(sn_tab[i].name, NULL) == 0) {
if (bdrv_all_find_snapshot(sn_tab[i].name, false, NULL, NULL) == 0) {
global_snapshots[total] = i;
total++;
QTAILQ_FOREACH(image_entry, &image_list, next) {