To make it clear about id and name in searching, the API was changed
a bit to distinguish them. Caller can choose to search by id or name now.
Searching will be done with higher priority of id.
Signed-off-by: Wenchao Xia <xiaw...@linux.vnet.ibm.com>
---
block.c | 43 +++++++++++++++++++++++++++++++++++--------
include/block/block.h | 2 +-
savevm.c | 10 +++++-----
3 files changed, 41 insertions(+), 14 deletions(-)
diff --git a/block.c b/block.c
index 7d5c5d2..28afaae 100644
--- a/block.c
+++ b/block.c
@@ -3426,8 +3426,18 @@ int bdrv_snapshot_load_tmp(BlockDriverState *bs,
return -ENOTSUP;
}
+/*
+ * Try find an internal snapshot with @id or @name, @id have higher priority
+ * in searching.
+ * @bs block device to search on, must not be NULL.
+ * @sn_info snapshot information to be filled in, must not be NULL.
+ * @id snapshot id to search with, can be NULL.
+ * @name snapshot name to search with, can be NULL.
+ * returns 0 and @sn_info is filled with related information if found,
+ * otherwise it returns negative value.
+ */
int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
- const char *name)
+ const char *id, const char *name)
{
QEMUSnapshotInfo *sn_tab, *sn;
int nb_sns, i, ret;
@@ -3435,17 +3445,34 @@ int bdrv_snapshot_find(BlockDriverState *bs,
QEMUSnapshotInfo *sn_info,
ret = -ENOENT;
nb_sns = bdrv_snapshot_list(bs, &sn_tab);
if (nb_sns < 0) {
- return ret;
+ return nb_sns;
}
- for (i = 0; i < nb_sns; i++) {
- sn = &sn_tab[i];
- if (!strcmp(sn->id_str, name) || !strcmp(sn->name, name)) {
- *sn_info = *sn;
- ret = 0;
- break;
+ /* search by id */
+ if (id) {
+ for (i = 0; i < nb_sns; i++) {
+ sn = &sn_tab[i];
+ if (!strcmp(sn->id_str, id)) {
+ *sn_info = *sn;
+ ret = 0;
+ goto out;
+ }
}
}
+
+ /* search by name */
+ if (name) {
+ for (i = 0; i < nb_sns; i++) {
+ sn = &sn_tab[i];
+ if (!strcmp(sn->name, name)) {
+ *sn_info = *sn;
+ ret = 0;
+ goto out;
+ }
+ }
+ }
+
+ out:
g_free(sn_tab);
return ret;
}
diff --git a/include/block/block.h b/include/block/block.h
index d2b8bd1..e436918 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -344,7 +344,7 @@ int bdrv_snapshot_load_tmp(BlockDriverState *bs,
const char *snapshot_name);
char *bdrv_snapshot_dump(char *buf, int buf_size, QEMUSnapshotInfo *sn);
int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
- const char *name);
+ const char *id, const char *name);
char *get_human_readable_size(char *buf, int buf_size, int64_t size);
int path_is_absolute(const char *path);
diff --git a/savevm.c b/savevm.c
index f73ac32..e151147 100644
--- a/savevm.c
+++ b/savevm.c
@@ -2072,7 +2072,7 @@ static int del_existing_snapshots(Monitor *mon, const
char *name)
bs = NULL;
while ((bs = bdrv_next(bs))) {
if (bdrv_can_snapshot(bs) &&
- bdrv_snapshot_find(bs, snapshot, name) >= 0)
+ bdrv_snapshot_find(bs, snapshot, name, name) >= 0)
{
ret = bdrv_snapshot_delete(bs, name);
if (ret < 0) {
@@ -2132,7 +2132,7 @@ void do_savevm(Monitor *mon, const QDict *qdict)
sn->vm_clock_nsec = qemu_get_clock_ns(vm_clock);
if (name) {
- ret = bdrv_snapshot_find(bs, old_sn, name);
+ ret = bdrv_snapshot_find(bs, old_sn, name, name);
if (ret >= 0) {
pstrcpy(sn->name, sizeof(sn->name), old_sn->name);
pstrcpy(sn->id_str, sizeof(sn->id_str), old_sn->id_str);
@@ -2223,7 +2223,7 @@ int load_vmstate(const char *name)
}
/* Don't even try to load empty VM states */
- ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
+ ret = bdrv_snapshot_find(bs_vm_state, &sn, name, name);
if (ret < 0) {
return ret;
} else if (sn.vm_state_size == 0) {
@@ -2247,7 +2247,7 @@ int load_vmstate(const char *name)
return -ENOTSUP;
}
- ret = bdrv_snapshot_find(bs, &sn, name);
+ ret = bdrv_snapshot_find(bs, &sn, name, name);
if (ret < 0) {
error_report("Device '%s' does not have the requested snapshot
'%s'",
bdrv_get_device_name(bs), name);
@@ -2353,7 +2353,7 @@ void do_info_snapshots(Monitor *mon, const QDict *qdict)
while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1) && bs1 != bs) {
- ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str);
+ ret = bdrv_snapshot_find(bs1, sn_info, sn->id_str, NULL);
if (ret < 0) {
available = 0;
break;
--
1.7.1
