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[Qemu-devel] [RFC PATCH v3 4/4] qcow2: Preliminary block-queue support
|
From: |
Kevin Wolf |
|
Subject: |
[Qemu-devel] [RFC PATCH v3 4/4] qcow2: Preliminary block-queue support |
|
Date: |
Tue, 30 Nov 2010 13:48:52 +0100 |
This is a first hack that makes qcow2 use block-queue. Will be reworked to pass
down the blkqueue context to all functions that queue requests instead of using
a global per-image context.
---
block/qcow2-cluster.c | 39 +++++++++++-----------
block/qcow2-refcount.c | 62 ++++++++++++++++++------------------
block/qcow2.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++-
block/qcow2.h | 5 +++
cpus.c | 8 +++--
qemu-common.h | 3 ++
qemu-tool.c | 5 +++
sysemu.h | 1 -
8 files changed, 151 insertions(+), 55 deletions(-)
diff --git a/block/qcow2-cluster.c b/block/qcow2-cluster.c
index b040208..674699d 100644
--- a/block/qcow2-cluster.c
+++ b/block/qcow2-cluster.c
@@ -67,12 +67,13 @@ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size,
bool exact_size)
qemu_free(new_l1_table);
return new_l1_table_offset;
}
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_WRITE_TABLE);
for(i = 0; i < s->l1_size; i++)
new_l1_table[i] = cpu_to_be64(new_l1_table[i]);
- ret = bdrv_pwrite_sync(bs->file, new_l1_table_offset, new_l1_table,
new_l1_size2);
+ ret = blkqueue_pwrite(s->bq_context, new_l1_table_offset, new_l1_table,
new_l1_size2);
+ blkqueue_barrier(s->bq_context);
if (ret < 0)
goto fail;
for(i = 0; i < s->l1_size; i++)
@@ -82,7 +83,8 @@ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size,
bool exact_size)
BLKDBG_EVENT(bs->file, BLKDBG_L1_GROW_ACTIVATE_TABLE);
cpu_to_be32w((uint32_t*)data, new_l1_size);
cpu_to_be64w((uint64_t*)(data + 4), new_l1_table_offset);
- ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader, l1_size),
data,sizeof(data));
+ ret = blkqueue_pwrite(s->bq_context, offsetof(QCowHeader, l1_size), data,
sizeof(data));
+ blkqueue_barrier(s->bq_context);
if (ret < 0) {
goto fail;
}
@@ -185,8 +187,7 @@ static int l2_load(BlockDriverState *bs, uint64_t l2_offset,
*l2_table = s->l2_cache + (min_index << s->l2_bits);
BLKDBG_EVENT(bs->file, BLKDBG_L2_LOAD);
- ret = bdrv_pread(bs->file, l2_offset, *l2_table,
- s->l2_size * sizeof(uint64_t));
+ ret = blkqueue_pread(s->bq_context, l2_offset, *l2_table, s->l2_size *
sizeof(uint64_t));
if (ret < 0) {
qcow2_l2_cache_reset(bs);
return ret;
@@ -216,8 +217,8 @@ static int write_l1_entry(BlockDriverState *bs, int
l1_index)
}
BLKDBG_EVENT(bs->file, BLKDBG_L1_UPDATE);
- ret = bdrv_pwrite_sync(bs->file, s->l1_table_offset + 8 * l1_start_index,
- buf, sizeof(buf));
+ ret = blkqueue_pwrite(s->bq_context, s->l1_table_offset + 8 *
l1_start_index, buf, sizeof(buf));
+ blkqueue_barrier(s->bq_context);
if (ret < 0) {
return ret;
}
@@ -252,7 +253,7 @@ static int l2_allocate(BlockDriverState *bs, int l1_index,
uint64_t **table)
if (l2_offset < 0) {
return l2_offset;
}
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
/* allocate a new entry in the l2 cache */
@@ -265,16 +266,15 @@ static int l2_allocate(BlockDriverState *bs, int
l1_index, uint64_t **table)
} else {
/* if there was an old l2 table, read it from the disk */
BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_COW_READ);
- ret = bdrv_pread(bs->file, old_l2_offset, l2_table,
- s->l2_size * sizeof(uint64_t));
+ ret = blkqueue_pread(s->bq_context, old_l2_offset, l2_table,
s->l2_size * sizeof(uint64_t));
if (ret < 0) {
goto fail;
}
}
/* write the l2 table to the file */
BLKDBG_EVENT(bs->file, BLKDBG_L2_ALLOC_WRITE);
- ret = bdrv_pwrite_sync(bs->file, l2_offset, l2_table,
- s->l2_size * sizeof(uint64_t));
+ ret = blkqueue_pwrite(s->bq_context, l2_offset, l2_table, s->l2_size *
sizeof(uint64_t));
+ blkqueue_barrier(s->bq_context);
if (ret < 0) {
goto fail;
}
@@ -394,8 +394,8 @@ static int qcow_read(BlockDriverState *bs, int64_t
sector_num,
memcpy(buf, s->cluster_cache + index_in_cluster * 512, 512 * n);
} else {
BLKDBG_EVENT(bs->file, BLKDBG_READ);
- ret = bdrv_pread(bs->file, cluster_offset + index_in_cluster *
512, buf, n * 512);
- if (ret != n * 512)
+ ret = blkqueue_pread(s->bq_context, cluster_offset +
index_in_cluster * 512, buf, n * 512);
+ if (ret < 0)
return -1;
if (s->crypt_method) {
qcow2_encrypt_sectors(s, sector_num, buf, buf, n, 0,
@@ -647,11 +647,12 @@ uint64_t
qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE_COMPRESSED);
l2_table[l2_index] = cpu_to_be64(cluster_offset);
- if (bdrv_pwrite_sync(bs->file,
+ if (blkqueue_pwrite(s->bq_context,
l2_offset + l2_index * sizeof(uint64_t),
l2_table + l2_index,
sizeof(uint64_t)) < 0)
return 0;
+ blkqueue_barrier(s->bq_context);
return cluster_offset;
}
@@ -664,6 +665,7 @@ uint64_t
qcow2_alloc_compressed_cluster_offset(BlockDriverState *bs,
static int write_l2_entries(BlockDriverState *bs, uint64_t *l2_table,
uint64_t l2_offset, int l2_index, int num)
{
+ BDRVQcowState *s = bs->opaque;
int l2_start_index = l2_index & ~(L1_ENTRIES_PER_SECTOR - 1);
int start_offset = (8 * l2_index) & ~511;
int end_offset = (8 * (l2_index + num) + 511) & ~511;
@@ -671,8 +673,7 @@ static int write_l2_entries(BlockDriverState *bs, uint64_t
*l2_table,
int ret;
BLKDBG_EVENT(bs->file, BLKDBG_L2_UPDATE);
- ret = bdrv_pwrite(bs->file, l2_offset + start_offset,
- &l2_table[l2_start_index], len);
+ ret = blkqueue_pwrite(s->bq_context, l2_offset + start_offset,
&l2_table[l2_start_index], len);
if (ret < 0) {
return ret;
}
@@ -733,7 +734,7 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs,
QCowL2Meta *m)
* need to be sure that the refcounts have been increased and COW was
* handled.
*/
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
ret = write_l2_entries(bs, l2_table, l2_offset, l2_index, m->nb_clusters);
if (ret < 0) {
@@ -746,7 +747,7 @@ int qcow2_alloc_cluster_link_l2(BlockDriverState *bs,
QCowL2Meta *m)
* Also flush bs->file to get the right order for L2 and refcount update.
*/
if (j != 0) {
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
for (i = 0; i < j; i++) {
qcow2_free_any_clusters(bs,
be64_to_cpu(old_cluster[i]) & ~QCOW_OFLAG_COPIED, 1);
diff --git a/block/qcow2-refcount.c b/block/qcow2-refcount.c
index a10453c..ef109e9 100644
--- a/block/qcow2-refcount.c
+++ b/block/qcow2-refcount.c
@@ -44,7 +44,7 @@ static int write_refcount_block(BlockDriverState *bs)
}
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_UPDATE);
- if (bdrv_pwrite_sync(bs->file, s->refcount_block_cache_offset,
+ if (blkqueue_pwrite(s->bq_context, s->refcount_block_cache_offset,
s->refcount_block_cache, size) < 0)
{
return -EIO;
@@ -66,8 +66,7 @@ int qcow2_refcount_init(BlockDriverState *bs)
s->refcount_table = qemu_malloc(refcount_table_size2);
if (s->refcount_table_size > 0) {
BLKDBG_EVENT(bs->file, BLKDBG_REFTABLE_LOAD);
- ret = bdrv_pread(bs->file, s->refcount_table_offset,
- s->refcount_table, refcount_table_size2);
+ ret = bdrv_pread(bs->file, s->refcount_table_offset,
s->refcount_table, refcount_table_size2);
if (ret != refcount_table_size2)
goto fail;
for(i = 0; i < s->refcount_table_size; i++)
@@ -100,8 +99,7 @@ static int load_refcount_block(BlockDriverState *bs,
}
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_LOAD);
- ret = bdrv_pread(bs->file, refcount_block_offset, s->refcount_block_cache,
- s->cluster_size);
+ ret = blkqueue_pread(s->bq_context, refcount_block_offset,
s->refcount_block_cache, s->cluster_size);
if (ret < 0) {
s->refcount_block_cache_offset = 0;
return ret;
@@ -262,7 +260,7 @@ static int64_t alloc_refcount_block(BlockDriverState *bs,
int64_t cluster_index)
goto fail_block;
}
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
/* Initialize the new refcount block only after updating its refcount,
* update_refcount uses the refcount cache itself */
@@ -272,8 +270,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs,
int64_t cluster_index)
/* Now the new refcount block needs to be written to disk */
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE);
- ret = bdrv_pwrite_sync(bs->file, new_block, s->refcount_block_cache,
- s->cluster_size);
+ ret = blkqueue_pwrite(s->bq_context, new_block, s->refcount_block_cache,
s->cluster_size);
+ blkqueue_barrier(s->bq_context);
if (ret < 0) {
goto fail_block;
}
@@ -282,9 +280,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs,
int64_t cluster_index)
if (refcount_table_index < s->refcount_table_size) {
uint64_t data64 = cpu_to_be64(new_block);
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_HOOKUP);
- ret = bdrv_pwrite_sync(bs->file,
- s->refcount_table_offset + refcount_table_index * sizeof(uint64_t),
- &data64, sizeof(data64));
+ ret = blkqueue_pwrite(s->bq_context, s->refcount_table_offset +
refcount_table_index * sizeof(uint64_t), &data64, sizeof(data64));
+ blkqueue_barrier(s->bq_context);
if (ret < 0) {
goto fail_block;
}
@@ -362,8 +359,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs,
int64_t cluster_index)
/* Write refcount blocks to disk */
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE_BLOCKS);
- ret = bdrv_pwrite_sync(bs->file, meta_offset, new_blocks,
- blocks_clusters * s->cluster_size);
+ ret = blkqueue_pwrite(s->bq_context, meta_offset, new_blocks,
blocks_clusters * s->cluster_size);
+ blkqueue_barrier(s->bq_context);
qemu_free(new_blocks);
if (ret < 0) {
goto fail_table;
@@ -375,8 +372,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs,
int64_t cluster_index)
}
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_WRITE_TABLE);
- ret = bdrv_pwrite_sync(bs->file, table_offset, new_table,
- table_size * sizeof(uint64_t));
+ ret = blkqueue_pwrite(s->bq_context, table_offset, new_table, table_size *
sizeof(uint64_t));
+ blkqueue_barrier(s->bq_context);
if (ret < 0) {
goto fail_table;
}
@@ -390,8 +387,8 @@ static int64_t alloc_refcount_block(BlockDriverState *bs,
int64_t cluster_index)
cpu_to_be64w((uint64_t*)data, table_offset);
cpu_to_be32w((uint32_t*)(data + 8), table_clusters);
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_ALLOC_SWITCH_TABLE);
- ret = bdrv_pwrite_sync(bs->file, offsetof(QCowHeader,
refcount_table_offset),
- data, sizeof(data));
+ ret = blkqueue_pwrite(s->bq_context, offsetof(QCowHeader,
refcount_table_offset), data, sizeof(data));
+ blkqueue_barrier(s->bq_context);
if (ret < 0) {
goto fail_table;
}
@@ -447,9 +444,7 @@ static int write_refcount_block_entries(BlockDriverState
*bs,
size = (last_index - first_index) << REFCOUNT_SHIFT;
BLKDBG_EVENT(bs->file, BLKDBG_REFBLOCK_UPDATE_PART);
- ret = bdrv_pwrite(bs->file,
- refcount_block_offset + (first_index << REFCOUNT_SHIFT),
- &s->refcount_block_cache[first_index], size);
+ ret = blkqueue_pwrite(s->bq_context, refcount_block_offset + (first_index
<< REFCOUNT_SHIFT), &s->refcount_block_cache[first_index], size);
if (ret < 0) {
return ret;
}
@@ -577,7 +572,7 @@ static int update_cluster_refcount(BlockDriverState *bs,
return ret;
}
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
return get_refcount(bs, cluster_index);
}
@@ -679,7 +674,7 @@ int64_t qcow2_alloc_bytes(BlockDriverState *bs, int size)
}
}
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
return offset;
}
@@ -772,8 +767,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
l1_table = NULL;
}
l1_allocated = 1;
- if (bdrv_pread(bs->file, l1_table_offset,
- l1_table, l1_size2) != l1_size2)
+ if (blkqueue_pread(s->bq_context, l1_table_offset, l1_table, l1_size2)
< 0)
goto fail;
for(i = 0;i < l1_size; i++)
be64_to_cpus(&l1_table[i]);
@@ -792,7 +786,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
old_l2_offset = l2_offset;
l2_offset &= ~QCOW_OFLAG_COPIED;
l2_modified = 0;
- if (bdrv_pread(bs->file, l2_offset, l2_table, l2_size) != l2_size)
+ if (blkqueue_pread(s->bq_context, l2_offset, l2_table, l2_size) <
0)
goto fail;
for(j = 0; j < s->l2_size; j++) {
offset = be64_to_cpu(l2_table[j]);
@@ -813,7 +807,7 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
/* TODO Flushing once for the whole function should
* be enough */
- bdrv_flush(bs->file);
+ blkqueue_barrier(s->bq_context);
}
/* compressed clusters are never modified */
refcount = 2;
@@ -839,9 +833,10 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
}
}
if (l2_modified) {
- if (bdrv_pwrite_sync(bs->file,
+ if (blkqueue_pwrite(s->bq_context,
l2_offset, l2_table, l2_size) < 0)
goto fail;
+ blkqueue_barrier(s->bq_context);
}
if (addend != 0) {
@@ -863,9 +858,10 @@ int qcow2_update_snapshot_refcount(BlockDriverState *bs,
if (l1_modified) {
for(i = 0; i < l1_size; i++)
cpu_to_be64s(&l1_table[i]);
- if (bdrv_pwrite_sync(bs->file, l1_table_offset, l1_table,
+ if (blkqueue_pwrite(s->bq_context, l1_table_offset, l1_table,
l1_size2) < 0)
goto fail;
+ blkqueue_barrier(s->bq_context);
for(i = 0; i < l1_size; i++)
be64_to_cpus(&l1_table[i]);
}
@@ -956,8 +952,9 @@ static int check_refcounts_l2(BlockDriverState *bs,
BdrvCheckResult *res,
l2_size = s->l2_size * sizeof(uint64_t);
l2_table = qemu_malloc(l2_size);
- if (bdrv_pread(bs->file, l2_offset, l2_table, l2_size) != l2_size)
+ if (blkqueue_pread(s->bq_context, l2_offset, l2_table, l2_size) < 0) {
goto fail;
+ }
/* Do the actual checks */
for(i = 0; i < s->l2_size; i++) {
@@ -1051,9 +1048,10 @@ static int check_refcounts_l1(BlockDriverState *bs,
l1_table = NULL;
} else {
l1_table = qemu_malloc(l1_size2);
- if (bdrv_pread(bs->file, l1_table_offset,
- l1_table, l1_size2) != l1_size2)
+ if (blkqueue_pread(s->bq_context, l1_table_offset, l1_table, l1_size2)
< 0) {
goto fail;
+ }
+
for(i = 0;i < l1_size; i++)
be64_to_cpus(&l1_table[i]);
}
@@ -1127,6 +1125,8 @@ int qcow2_check_refcounts(BlockDriverState *bs,
BdrvCheckResult *res)
nb_clusters = size_to_clusters(s, size);
refcount_table = qemu_mallocz(nb_clusters * sizeof(uint16_t));
+ blkqueue_init_context(s->bq_context, s->bq);
+
/* header */
inc_refcounts(bs, res, refcount_table, nb_clusters,
0, s->cluster_size);
diff --git a/block/qcow2.c b/block/qcow2.c
index 537c479..1ad2832 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -136,6 +136,21 @@ static int qcow_read_extensions(BlockDriverState *bs,
uint64_t start_offset,
return 0;
}
+static bool qcow_blkqueue_error_cb(void *opaque, int ret)
+{
+ BlockDriverState *bs = opaque;
+ BlockErrorAction action = bdrv_get_on_error(bs, 0);
+
+ if ((action == BLOCK_ERR_STOP_ENOSPC && ret == -ENOSPC)
+ || action == BLOCK_ERR_STOP_ANY)
+ {
+ bdrv_mon_event(bs, BDRV_ACTION_STOP, 0);
+ vm_stop(0);
+ return true;
+ }
+
+ return false;
+}
static int qcow_open(BlockDriverState *bs, int flags)
{
@@ -237,6 +252,11 @@ static int qcow_open(BlockDriverState *bs, int flags)
if (qcow2_read_snapshots(bs) < 0)
goto fail;
+ /* Block queue */
+ s->bq = blkqueue_create(bs->file, qcow_blkqueue_error_cb, bs);
+ blkqueue_init_context(&s->initial_bq_context, s->bq);
+ s->bq_context = &s->initial_bq_context;
+
#ifdef DEBUG_ALLOC
qcow2_check_refcounts(bs);
#endif
@@ -341,6 +361,7 @@ typedef struct QCowAIOCB {
QEMUIOVector hd_qiov;
QEMUBH *bh;
QCowL2Meta l2meta;
+ BlockQueueContext bq_context;
QLIST_ENTRY(QCowAIOCB) next_depend;
} QCowAIOCB;
@@ -387,6 +408,8 @@ static void qcow_aio_read_cb(void *opaque, int ret)
BDRVQcowState *s = bs->opaque;
int index_in_cluster, n1;
+ s->bq_context = &acb->bq_context;
+
acb->hd_aiocb = NULL;
if (ret < 0)
goto done;
@@ -519,6 +542,7 @@ static QCowAIOCB *qcow_aio_setup(BlockDriverState *bs,
int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
BlockDriverCompletionFunc *cb, void *opaque, int is_write)
{
+ BDRVQcowState *s = bs->opaque;
QCowAIOCB *acb;
acb = qemu_aio_get(&qcow_aio_pool, bs, cb, opaque);
@@ -536,6 +560,10 @@ static QCowAIOCB *qcow_aio_setup(BlockDriverState *bs,
acb->cluster_offset = 0;
acb->l2meta.nb_clusters = 0;
QLIST_INIT(&acb->l2meta.dependent_requests);
+
+ /* TODO Push the context into l2meta */
+ blkqueue_init_context(&acb->bq_context, s->bq);
+
return acb;
}
@@ -582,6 +610,7 @@ static void qcow_aio_write_cb(void *opaque, int ret)
int index_in_cluster;
int n_end;
+ s->bq_context = &acb->bq_context;
acb->hd_aiocb = NULL;
if (ret >= 0) {
@@ -694,6 +723,7 @@ static void qcow_close(BlockDriverState *bs)
qemu_free(s->cluster_cache);
qemu_free(s->cluster_data);
qcow2_refcount_close(bs);
+ blkqueue_destroy(s->bq);
}
/*
@@ -1150,13 +1180,64 @@ static int qcow_write_compressed(BlockDriverState *bs,
int64_t sector_num,
static int qcow_flush(BlockDriverState *bs)
{
+ BDRVQcowState *s = bs->opaque;
+ int ret;
+
+ ret = blkqueue_flush(s->bq);
+ if (ret < 0) {
+ /*
+ * If the queue is empty, we couldn't handle the write error by
+ * stopping the guest. In this case we don't know which metadata writes
+ * have succeeded. Reopen the qcow2 layer to make sure that all caches
+ * are invalidated.
+ */
+ if (blkqueue_is_empty(s->bq)) {
+ qcow_close(bs);
+ qcow_open(bs, 0);
+ }
+
+ return ret;
+ }
+
return bdrv_flush(bs->file);
}
+typedef struct QcowFlushAIOCB {
+ BlockDriverState *bs;
+ BlockDriverCompletionFunc *cb;
+ void *opaque;
+} QcowFlushAIOCB;
+
+static void qcow_aio_flush_cb(void *opaque, int ret)
+{
+ QcowFlushAIOCB *acb = opaque;
+ BlockDriverState *bs = acb->bs;
+ BDRVQcowState *s = bs->opaque;
+
+ if (blkqueue_is_empty(s->bq)) {
+ qcow_close(bs);
+ qcow_open(bs, 0);
+ }
+
+ acb->cb(acb->opaque, ret);
+ qemu_free(acb);
+}
+
static BlockDriverAIOCB *qcow_aio_flush(BlockDriverState *bs,
BlockDriverCompletionFunc *cb, void *opaque)
{
- return bdrv_aio_flush(bs->file, cb, opaque);
+ BDRVQcowState *s = bs->opaque;
+ BlockQueueContext context;
+ QcowFlushAIOCB *acb;
+
+ blkqueue_init_context(&context, s->bq);
+
+ acb = qemu_malloc(sizeof(*acb));
+ acb->bs = bs;
+ acb->cb = cb;
+ acb->opaque = opaque;
+
+ return blkqueue_aio_flush(&context, qcow_aio_flush_cb, acb);
}
static int64_t qcow_vm_state_offset(BDRVQcowState *s)
diff --git a/block/qcow2.h b/block/qcow2.h
index 2d22e5e..2ef910c 100644
--- a/block/qcow2.h
+++ b/block/qcow2.h
@@ -26,6 +26,7 @@
#define BLOCK_QCOW2_H
#include "aes.h"
+#include "block-queue.h"
//#define DEBUG_ALLOC
//#define DEBUG_ALLOC2
@@ -108,6 +109,10 @@ typedef struct BDRVQcowState {
int64_t free_cluster_index;
int64_t free_byte_offset;
+ BlockQueue *bq;
+ BlockQueueContext *bq_context;
+ BlockQueueContext initial_bq_context;
+
uint32_t crypt_method; /* current crypt method, 0 if no key yet */
uint32_t crypt_method_header;
AES_KEY aes_encrypt_key;
diff --git a/cpus.c b/cpus.c
index 91a0fb1..8ec0ed6 100644
--- a/cpus.c
+++ b/cpus.c
@@ -310,9 +310,10 @@ void qemu_notify_event(void)
void qemu_mutex_lock_iothread(void) {}
void qemu_mutex_unlock_iothread(void) {}
-void vm_stop(int reason)
+bool vm_stop(int reason)
{
do_vm_stop(reason);
+ return true;
}
#else /* CONFIG_IOTHREAD */
@@ -848,7 +849,7 @@ static void qemu_system_vmstop_request(int reason)
qemu_notify_event();
}
-void vm_stop(int reason)
+bool vm_stop(int reason)
{
QemuThread me;
qemu_thread_self(&me);
@@ -863,9 +864,10 @@ void vm_stop(int reason)
cpu_exit(cpu_single_env);
cpu_single_env->stop = 1;
}
- return;
+ return true;
}
do_vm_stop(reason);
+ return true;
}
#endif
diff --git a/qemu-common.h b/qemu-common.h
index b3957f1..1c23b0f 100644
--- a/qemu-common.h
+++ b/qemu-common.h
@@ -115,6 +115,9 @@ static inline char *realpath(const char *path, char
*resolved_path)
#endif /* !defined(NEED_CPU_H) */
+/* VM state */
+bool vm_stop(int reason);
+
/* bottom halves */
typedef void QEMUBHFunc(void *opaque);
diff --git a/qemu-tool.c b/qemu-tool.c
index 392e1c9..3926435 100644
--- a/qemu-tool.c
+++ b/qemu-tool.c
@@ -111,3 +111,8 @@ int qemu_set_fd_handler2(int fd,
{
return 0;
}
+
+bool vm_stop(int reason)
+{
+ return false;
+}
diff --git a/sysemu.h b/sysemu.h
index b81a70e..77788f1 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -38,7 +38,6 @@ VMChangeStateEntry
*qemu_add_vm_change_state_handler(VMChangeStateHandler *cb,
void qemu_del_vm_change_state_handler(VMChangeStateEntry *e);
void vm_start(void);
-void vm_stop(int reason);
uint64_t ram_bytes_remaining(void);
uint64_t ram_bytes_transferred(void);
--
1.7.2.3