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authorMarkus Armbruster <armbru@redhat.com>2010-06-02 18:55:21 +0200
committerKevin Wolf <kwolf@redhat.com>2010-06-15 09:41:59 +0200
commitdbc13590f63fd04244e532e51aab3569fb525548 (patch)
tree838ec2b0a54ad0c1278505b85b5183f6de991632
parent2f399b0aad7d16ce53d15a79b0b2c9315ac70e11 (diff)
block: Decouple savevm from DriveInfo
We find snapshots by iterating over the list of drives defined with drive_init(). This misses host block devices defined by other means. Such means don't exist now, but will be introduced later in this series. Iterate over all host block devices instead, with bdrv_next(). Signed-off-by: Markus Armbruster <armbru@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
-rw-r--r--savevm.c40
1 files changed, 18 insertions, 22 deletions
diff --git a/savevm.c b/savevm.c
index ab58d63c85..20354a8714 100644
--- a/savevm.c
+++ b/savevm.c
@@ -1578,12 +1578,13 @@ out:
static BlockDriverState *get_bs_snapshots(void)
{
BlockDriverState *bs;
- DriveInfo *dinfo;
if (bs_snapshots)
return bs_snapshots;
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs = dinfo->bdrv;
+ /* FIXME what if bs_snapshots gets hot-unplugged? */
+
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
if (bdrv_can_snapshot(bs)) {
goto ok;
}
@@ -1622,12 +1623,11 @@ static int bdrv_snapshot_find(BlockDriverState *bs, QEMUSnapshotInfo *sn_info,
static int del_existing_snapshots(Monitor *mon, const char *name)
{
BlockDriverState *bs;
- DriveInfo *dinfo;
QEMUSnapshotInfo sn1, *snapshot = &sn1;
int ret;
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs = dinfo->bdrv;
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
if (bdrv_can_snapshot(bs) &&
bdrv_snapshot_find(bs, snapshot, name) >= 0)
{
@@ -1646,7 +1646,6 @@ static int del_existing_snapshots(Monitor *mon, const char *name)
void do_savevm(Monitor *mon, const QDict *qdict)
{
- DriveInfo *dinfo;
BlockDriverState *bs, *bs1;
QEMUSnapshotInfo sn1, *sn = &sn1, old_sn1, *old_sn = &old_sn1;
int ret;
@@ -1661,8 +1660,8 @@ void do_savevm(Monitor *mon, const QDict *qdict)
const char *name = qdict_get_try_str(qdict, "name");
/* Verify if there is a device that doesn't support snapshots and is writable */
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs = dinfo->bdrv;
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
continue;
@@ -1730,8 +1729,8 @@ void do_savevm(Monitor *mon, const QDict *qdict)
/* create the snapshots */
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs1 = dinfo->bdrv;
+ bs1 = NULL;
+ while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1)) {
/* Write VM state size only to the image that contains the state */
sn->vm_state_size = (bs == bs1 ? vm_state_size : 0);
@@ -1750,15 +1749,14 @@ void do_savevm(Monitor *mon, const QDict *qdict)
int load_vmstate(const char *name)
{
- DriveInfo *dinfo;
BlockDriverState *bs, *bs1;
QEMUSnapshotInfo sn;
QEMUFile *f;
int ret;
/* Verify if there is a device that doesn't support snapshots and is writable */
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs = dinfo->bdrv;
+ bs = NULL;
+ while ((bs = bdrv_next(bs))) {
if (bdrv_is_removable(bs) || bdrv_is_read_only(bs)) {
continue;
@@ -1780,8 +1778,8 @@ int load_vmstate(const char *name)
/* Flush all IO requests so they don't interfere with the new state. */
qemu_aio_flush();
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs1 = dinfo->bdrv;
+ bs1 = NULL;
+ while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1)) {
ret = bdrv_snapshot_goto(bs1, name);
if (ret < 0) {
@@ -1831,7 +1829,6 @@ int load_vmstate(const char *name)
void do_delvm(Monitor *mon, const QDict *qdict)
{
- DriveInfo *dinfo;
BlockDriverState *bs, *bs1;
int ret;
const char *name = qdict_get_str(qdict, "name");
@@ -1842,8 +1839,8 @@ void do_delvm(Monitor *mon, const QDict *qdict)
return;
}
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs1 = dinfo->bdrv;
+ bs1 = NULL;
+ while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1)) {
ret = bdrv_snapshot_delete(bs1, name);
if (ret < 0) {
@@ -1861,7 +1858,6 @@ void do_delvm(Monitor *mon, const QDict *qdict)
void do_info_snapshots(Monitor *mon)
{
- DriveInfo *dinfo;
BlockDriverState *bs, *bs1;
QEMUSnapshotInfo *sn_tab, *sn;
int nb_sns, i;
@@ -1873,8 +1869,8 @@ void do_info_snapshots(Monitor *mon)
return;
}
monitor_printf(mon, "Snapshot devices:");
- QTAILQ_FOREACH(dinfo, &drives, next) {
- bs1 = dinfo->bdrv;
+ bs1 = NULL;
+ while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1)) {
if (bs == bs1)
monitor_printf(mon, " %s", bdrv_get_device_name(bs1));