openkylin
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qemu
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Merge remote branch 'kwolf/for-anthony' into staging

This commit is contained in:
Anthony Liguori 2010-08-09 08:25:12 -05:00
parent a523eb06ec 953844d102
commit f040236cd5
9 changed files with 115 additions and 77 deletions
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38
block.c
View File

@ -739,14 +739,16 @@ int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res)
return bs->drv->bdrv_check(bs, res);
}
#define COMMIT_BUF_SECTORS 2048
/* commit COW file into the raw image */
int bdrv_commit(BlockDriverState *bs)
{
BlockDriver *drv = bs->drv;
int64_t i, total_sectors;
int n, j, ro, open_flags;
int64_t sector, total_sectors;
int n, ro, open_flags;
int ret = 0, rw_ret = 0;
unsigned char sector[BDRV_SECTOR_SIZE];
uint8_t *buf;
char filename[1024];
BlockDriverState *bs_rw, *bs_ro;
@ -789,22 +791,20 @@ int bdrv_commit(BlockDriverState *bs)
}
total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS;
for (i = 0; i < total_sectors;) {
if (drv->bdrv_is_allocated(bs, i, 65536, &n)) {
for(j = 0; j < n; j++) {
if (bdrv_read(bs, i, sector, 1) != 0) {
buf = qemu_malloc(COMMIT_BUF_SECTORS * BDRV_SECTOR_SIZE);
for (sector = 0; sector < total_sectors; sector += n) {
if (drv->bdrv_is_allocated(bs, sector, COMMIT_BUF_SECTORS, &n)) {
if (bdrv_read(bs, sector, buf, n) != 0) {
ret = -EIO;
goto ro_cleanup;
}
if (bdrv_write(bs->backing_hd, i, sector, 1) != 0) {
if (bdrv_write(bs->backing_hd, sector, buf, n) != 0) {
ret = -EIO;
goto ro_cleanup;
}
i++;
}
} else {
i += n;
}
}
@ -821,6 +821,7 @@ int bdrv_commit(BlockDriverState *bs)
bdrv_flush(bs->backing_hd);
ro_cleanup:
qemu_free(buf);
if (ro) {
/* re-open as RO */
@ -1476,10 +1477,8 @@ int bdrv_has_zero_init(BlockDriverState *bs)
{
assert(bs->drv);
if (bs->drv->no_zero_init) {
return 0;
} else if (bs->file) {
return bdrv_has_zero_init(bs->file);
if (bs->drv->bdrv_has_zero_init) {
return bs->drv->bdrv_has_zero_init(bs);
}
return 1;
@ -2518,7 +2517,7 @@ int bdrv_is_inserted(BlockDriverState *bs)
if (!drv)
return 0;
if (!drv->bdrv_is_inserted)
return 1;
return !bs->tray_open;
ret = drv->bdrv_is_inserted(bs);
return ret;
}
@ -2560,10 +2559,11 @@ int bdrv_eject(BlockDriverState *bs, int eject_flag)
ret = drv->bdrv_eject(bs, eject_flag);
}
if (ret == -ENOTSUP) {
if (eject_flag)
bdrv_close(bs);
ret = 0;
}
if (ret >= 0) {
bs->tray_open = eject_flag;
}
return ret;
}

13
block/raw-posix.c
View File

@ -993,6 +993,11 @@ static int hdev_create(const char *filename, QEMUOptionParameter *options)
return ret;
}
static int hdev_has_zero_init(BlockDriverState *bs)
{
return 0;
}
static BlockDriver bdrv_host_device = {
.format_name = "host_device",
.protocol_name = "host_device",
@ -1002,7 +1007,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_close = raw_close,
.bdrv_create = hdev_create,
.create_options = raw_create_options,
.no_zero_init = 1,
.bdrv_has_zero_init = hdev_has_zero_init,
.bdrv_flush = raw_flush,
.bdrv_aio_readv = raw_aio_readv,
@ -1117,7 +1122,7 @@ static BlockDriver bdrv_host_floppy = {
.bdrv_close = raw_close,
.bdrv_create = hdev_create,
.create_options = raw_create_options,
.no_zero_init = 1,
.bdrv_has_zero_init = hdev_has_zero_init,
.bdrv_flush = raw_flush,
.bdrv_aio_readv = raw_aio_readv,
@ -1217,7 +1222,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_close = raw_close,
.bdrv_create = hdev_create,
.create_options = raw_create_options,
.no_zero_init = 1,
.bdrv_has_zero_init = hdev_has_zero_init,
.bdrv_flush = raw_flush,
.bdrv_aio_readv = raw_aio_readv,
@ -1340,7 +1345,7 @@ static BlockDriver bdrv_host_cdrom = {
.bdrv_close = raw_close,
.bdrv_create = hdev_create,
.create_options = raw_create_options,
.no_zero_init = 1,
.bdrv_has_zero_init = hdev_has_zero_init,
.bdrv_flush = raw_flush,
.bdrv_aio_readv = raw_aio_readv,

6
block/raw-win32.c
View File

@ -394,6 +394,11 @@ static int raw_set_locked(BlockDriverState *bs, int locked)
}
#endif
static int hdev_has_zero_init(BlockDriverState *bs)
{
return 0;
}
static BlockDriver bdrv_host_device = {
.format_name = "host_device",
.protocol_name = "host_device",
@ -402,6 +407,7 @@ static BlockDriver bdrv_host_device = {
.bdrv_file_open = hdev_open,
.bdrv_close = raw_close,
.bdrv_flush = raw_flush,
.bdrv_has_zero_init = hdev_has_zero_init,
.bdrv_read = raw_read,
.bdrv_write = raw_write,

6
block/raw.c
View File

@ -237,6 +237,11 @@ static QEMUOptionParameter raw_create_options[] = {
{ NULL }
};
static int raw_has_zero_init(BlockDriverState *bs)
{
return bdrv_has_zero_init(bs->file);
}
static BlockDriver bdrv_raw = {
.format_name = "raw",
@ -264,6 +269,7 @@ static BlockDriver bdrv_raw = {
.bdrv_create = raw_create,
.create_options = raw_create_options,
.bdrv_has_zero_init = raw_has_zero_init,
};
static void bdrv_raw_init(void)

8
block_int.h
View File

@ -127,8 +127,11 @@ struct BlockDriver {
void (*bdrv_debug_event)(BlockDriverState *bs, BlkDebugEvent event);
/* Set if newly created images are not guaranteed to contain only zeros */
int no_zero_init;
/*
* Returns 1 if newly created images are guaranteed to contain only
* zeros, 0 otherwise.
*/
int (*bdrv_has_zero_init)(BlockDriverState *bs);
QLIST_ENTRY(BlockDriver) list;
};
@ -141,6 +144,7 @@ struct BlockDriverState {
int open_flags; /* flags used to open the file, re-used for re-open */
int removable; /* if true, the media can be removed */
int locked; /* if true, the media cannot temporarily be ejected */
int tray_open; /* if true, the virtual tray is open */
int encrypted; /* if true, the media is encrypted */
int valid_key; /* if true, a valid encryption key has been set */
int sg; /* if true, the device is a /dev/sg* */

23
hw/ide/pci.c
View File

@ -40,8 +40,27 @@ void bmdma_cmd_writeb(void *opaque, uint32_t addr, uint32_t val)
printf("%s: 0x%08x\n", __func__, val);
#endif
if (!(val & BM_CMD_START)) {
/* XXX: do it better */
ide_dma_cancel(bm);
/*
* We can't cancel Scatter Gather DMA in the middle of the
* operation or a partial (not full) DMA transfer would reach
* the storage so we wait for completion instead (we beahve
* like if the DMA was completed by the time the guest trying
* to cancel dma with bmdma_cmd_writeb with BM_CMD_START not
* set).
*
* In the future we'll be able to safely cancel the I/O if the
* whole DMA operation will be submitted to disk with a single
* aio operation with preadv/pwritev.
*/
if (bm->aiocb) {
qemu_aio_flush();
#ifdef DEBUG_IDE
if (bm->aiocb)
printf("ide_dma_cancel: aiocb still pending");
if (bm->status & BM_STATUS_DMAING)
printf("ide_dma_cancel: BM_STATUS_DMAING still pending");
#endif
}
bm->cmd = val & 0x09;
} else {
if (!(bm->status & BM_STATUS_DMAING)) {

3
monitor.c
View File

@ -2274,8 +2274,9 @@ static void do_loadvm(Monitor *mon, const QDict *qdict)
vm_stop(0);
if (load_vmstate(name) >= 0 && saved_vm_running)
if (load_vmstate(name) == 0 && saved_vm_running) {
vm_start();
}
}
int monitor_get_fd(Monitor *mon, const char *fdname)

71
savevm.c
View File

@ -1894,12 +1894,27 @@ void do_savevm(Monitor *mon, const QDict *qdict)
int load_vmstate(const char *name)
{
BlockDriverState *bs, *bs1;
BlockDriverState *bs, *bs_vm_state;
QEMUSnapshotInfo sn;
QEMUFile *f;
int ret;
/* Verify if there is a device that doesn't support snapshots and is writable */
bs_vm_state = bdrv_snapshots();
if (!bs_vm_state) {
error_report("No block device supports snapshots");
return -ENOTSUP;
}
/* Don't even try to load empty VM states */
ret = bdrv_snapshot_find(bs_vm_state, &sn, name);
if (ret < 0) {
return ret;
} else if (sn.vm_state_size == 0) {
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))) {
@ -1912,63 +1927,45 @@ int load_vmstate(const char *name)
bdrv_get_device_name(bs));
return -ENOTSUP;
}
}
bs = bdrv_snapshots();
if (!bs) {
error_report("No block device supports snapshots");
return -EINVAL;
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. */
qemu_aio_flush();
bs1 = NULL;
while ((bs1 = bdrv_next(bs1))) {
if (bdrv_can_snapshot(bs1)) {
ret = bdrv_snapshot_goto(bs1, name);
bs = NULL;
while ((bs = bdrv_next(bs))) {
if (bdrv_can_snapshot(bs)) {
ret = bdrv_snapshot_goto(bs, name);
if (ret < 0) {
switch(ret) {
case -ENOTSUP:
error_report("%sSnapshots not supported on device '%s'",
bs != bs1 ? "Warning: " : "",
bdrv_get_device_name(bs1));
break;
case -ENOENT:
error_report("%sCould not find snapshot '%s' on device '%s'",
bs != bs1 ? "Warning: " : "",
name, bdrv_get_device_name(bs1));
break;
default:
error_report("%sError %d while activating snapshot on '%s'",
bs != bs1 ? "Warning: " : "",
ret, bdrv_get_device_name(bs1));
break;
}
/* fatal on snapshot block device */
if (bs == bs1)
return 0;
error_report("Error %d while activating snapshot '%s' on '%s'",
ret, name, bdrv_get_device_name(bs));
return ret;
}
}
}
/* Don't even try to load empty VM states */
ret = bdrv_snapshot_find(bs, &sn, name);
if ((ret >= 0) && (sn.vm_state_size == 0))
return -EINVAL;
/* restore the VM state */
f = qemu_fopen_bdrv(bs, 0);
f = qemu_fopen_bdrv(bs_vm_state, 0);
if (!f) {
error_report("Could not open VM state file");
return -EINVAL;
}
ret = qemu_loadvm_state(f);
qemu_fclose(f);
if (ret < 0) {
error_report("Error %d while loading VM state", ret);
return ret;
}
return 0;
}