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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
replay/replay-debugging.c
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@ -148,7 +148,7 @@ static char *replay_find_nearest_snapshot(int64_t icount,
*snapshot_icount = -1;
bs = bdrv_all_find_vmstate_bs(NULL);
bs = bdrv_all_find_vmstate_bs(false, NULL, NULL);
if (!bs) {
goto fail;
}
@ -159,7 +159,7 @@ static char *replay_find_nearest_snapshot(int64_t icount,
aio_context_release(aio_context);
for (i = 0; i < nb_sns; i++) {
if (bdrv_all_find_snapshot(sn_tab[i].name, NULL) == 0) {
if (bdrv_all_find_snapshot(sn_tab[i].name, false, NULL, NULL) == 0) {
if (sn_tab[i].icount != -1ULL
&& sn_tab[i].icount <= icount
&& (!nearest || nearest->icount < sn_tab[i].icount)) {