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-rw-r--r--block/snapshot.c20
-rw-r--r--include/block/snapshot.h1
-rw-r--r--migration/savevm.c42
3 files changed, 30 insertions, 33 deletions
diff --git a/block/snapshot.c b/block/snapshot.c
index 9f07a63e6d..eae4730fc6 100644
--- a/block/snapshot.c
+++ b/block/snapshot.c
@@ -423,3 +423,23 @@ int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bad_bs)
*first_bad_bs = bs;
return err;
}
+
+int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs)
+{
+ QEMUSnapshotInfo sn;
+ int err = 0;
+ BlockDriverState *bs = NULL;
+
+ while (err == 0 && (bs = bdrv_next(bs))) {
+ AioContext *ctx = bdrv_get_aio_context(bs);
+
+ aio_context_acquire(ctx);
+ if (bdrv_can_snapshot(bs)) {
+ err = bdrv_snapshot_find(bs, &sn, name);
+ }
+ aio_context_release(ctx);
+ }
+
+ *first_bad_bs = bs;
+ return err;
+}
diff --git a/include/block/snapshot.h b/include/block/snapshot.h
index 0a176c7e50..10ee582f2c 100644
--- a/include/block/snapshot.h
+++ b/include/block/snapshot.h
@@ -85,5 +85,6 @@ bool bdrv_all_can_snapshot(BlockDriverState **first_bad_bs);
int bdrv_all_delete_snapshot(const char *name, BlockDriverState **first_bsd_bs,
Error **err);
int bdrv_all_goto_snapshot(const char *name, BlockDriverState **first_bsd_bs);
+int bdrv_all_find_snapshot(const char *name, BlockDriverState **first_bad_bs);
#endif
diff --git a/migration/savevm.c b/migration/savevm.c
index 2ecc1b3e09..4e6d578841 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2056,6 +2056,12 @@ int load_vmstate(const char *name)
bdrv_get_device_name(bs));
return -ENOTSUP;
}
+ ret = bdrv_all_find_snapshot(name, &bs);
+ if (ret < 0) {
+ error_report("Device '%s' does not have the requested snapshot '%s'",
+ bdrv_get_device_name(bs), name);
+ return ret;
+ }
bs_vm_state = find_vmstate_bs();
if (!bs_vm_state) {
@@ -2073,22 +2079,6 @@ int load_vmstate(const char *name)
return -EINVAL;
}
- /* Verify if there is any device that doesn't support snapshots and is
- writable and check if the requested snapshot is available too. */
- bs = NULL;
- while ((bs = bdrv_next(bs))) {
- if (!bdrv_can_snapshot(bs)) {
- continue;
- }
-
- ret = bdrv_snapshot_find(bs, &sn, name);
- if (ret < 0) {
- error_report("Device '%s' does not have the requested snapshot '%s'",
- bdrv_get_device_name(bs), name);
- return ret;
- }
- }
-
/* Flush all IO requests so they don't interfere with the new state. */
bdrv_drain_all();
@@ -2142,8 +2132,8 @@ void hmp_delvm(Monitor *mon, const QDict *qdict)
void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
{
BlockDriverState *bs, *bs1;
- QEMUSnapshotInfo *sn_tab, *sn, s, *sn_info = &s;
- int nb_sns, i, ret, available;
+ QEMUSnapshotInfo *sn_tab, *sn;
+ int nb_sns, i;
int total;
int *available_snapshots;
@@ -2167,21 +2157,7 @@ void hmp_info_snapshots(Monitor *mon, const QDict *qdict)
available_snapshots = g_new0(int, nb_sns);
total = 0;
for (i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- available = 1;
- bs1 = NULL;
-
- while ((bs1 = bdrv_next(bs1))) {
- if (bdrv_can_snapshot(bs1) && bs1 != bs) {
- ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
- if (ret < 0) {
- available = 0;
- break;
- }
- }
- }
-
- if (available) {
+ if (bdrv_all_find_snapshot(sn_tab[i].id_str, &bs1) == 0) {
available_snapshots[total] = i;
total++;
}