BdrvDirtyBitmap *bitmap;
};
+static inline void bdrv_dirty_bitmaps_lock(BlockDriverState *bs)
+{
+ qemu_mutex_lock(&bs->dirty_bitmap_mutex);
+}
+
+static inline void bdrv_dirty_bitmaps_unlock(BlockDriverState *bs)
+{
+ qemu_mutex_unlock(&bs->dirty_bitmap_mutex);
+}
+
+/* Called with BQL or dirty_bitmap lock taken. */
BdrvDirtyBitmap *bdrv_find_dirty_bitmap(BlockDriverState *bs, const char *name)
{
BdrvDirtyBitmap *bm;
return NULL;
}
+/* Called with BQL taken. */
void bdrv_dirty_bitmap_make_anon(BdrvDirtyBitmap *bitmap)
{
assert(!bdrv_dirty_bitmap_frozen(bitmap));
bitmap->name = NULL;
}
+/* Called with BQL taken. */
BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs,
uint32_t granularity,
const char *name,
bitmap->size = bitmap_size;
bitmap->name = g_strdup(name);
bitmap->disabled = false;
+ bdrv_dirty_bitmaps_lock(bs);
QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list);
+ bdrv_dirty_bitmaps_unlock(bs);
return bitmap;
}
return bitmap->name;
}
+/* Called with BQL taken. */
bool bdrv_dirty_bitmap_frozen(BdrvDirtyBitmap *bitmap)
{
return bitmap->successor;
}
+/* Called with BQL taken. */
bool bdrv_dirty_bitmap_enabled(BdrvDirtyBitmap *bitmap)
{
return !(bitmap->disabled || bitmap->successor);
}
+/* Called with BQL taken. */
DirtyBitmapStatus bdrv_dirty_bitmap_status(BdrvDirtyBitmap *bitmap)
{
if (bdrv_dirty_bitmap_frozen(bitmap)) {
/**
* Create a successor bitmap destined to replace this bitmap after an operation.
* Requires that the bitmap is not frozen and has no successor.
+ * Called with BQL taken.
*/
int bdrv_dirty_bitmap_create_successor(BlockDriverState *bs,
BdrvDirtyBitmap *bitmap, Error **errp)
/**
* For a bitmap with a successor, yield our name to the successor,
* delete the old bitmap, and return a handle to the new bitmap.
+ * Called with BQL taken.
*/
BdrvDirtyBitmap *bdrv_dirty_bitmap_abdicate(BlockDriverState *bs,
BdrvDirtyBitmap *bitmap,
* In cases of failure where we can no longer safely delete the parent,
* we may wish to re-join the parent and child/successor.
* The merged parent will be un-frozen, but not explicitly re-enabled.
+ * Called with BQL taken.
*/
BdrvDirtyBitmap *bdrv_reclaim_dirty_bitmap(BlockDriverState *bs,
BdrvDirtyBitmap *parent,
/**
* Truncates _all_ bitmaps attached to a BDS.
+ * Called with BQL taken.
*/
void bdrv_dirty_bitmap_truncate(BlockDriverState *bs)
{
BdrvDirtyBitmap *bitmap;
uint64_t size = bdrv_nb_sectors(bs);
+ bdrv_dirty_bitmaps_lock(bs);
QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
assert(!bdrv_dirty_bitmap_frozen(bitmap));
assert(!bitmap->active_iterators);
hbitmap_truncate(bitmap->bitmap, size);
bitmap->size = size;
}
+ bdrv_dirty_bitmaps_unlock(bs);
}
+/* Called with BQL taken. */
static void bdrv_do_release_matching_dirty_bitmap(BlockDriverState *bs,
BdrvDirtyBitmap *bitmap,
bool only_named)
{
BdrvDirtyBitmap *bm, *next;
+ bdrv_dirty_bitmaps_lock(bs);
QLIST_FOREACH_SAFE(bm, &bs->dirty_bitmaps, list, next) {
if ((!bitmap || bm == bitmap) && (!only_named || bm->name)) {
assert(!bm->active_iterators);
g_free(bm);
if (bitmap) {
- return;
+ goto out;
}
}
}
if (bitmap) {
abort();
}
+
+out:
+ bdrv_dirty_bitmaps_unlock(bs);
}
+/* Called with BQL taken. */
void bdrv_release_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap)
{
bdrv_do_release_matching_dirty_bitmap(bs, bitmap, false);
/**
* Release all named dirty bitmaps attached to a BDS (for use in bdrv_close()).
* There must not be any frozen bitmaps attached.
+ * Called with BQL taken.
*/
void bdrv_release_named_dirty_bitmaps(BlockDriverState *bs)
{
bdrv_do_release_matching_dirty_bitmap(bs, NULL, true);
}
+/* Called with BQL taken. */
void bdrv_disable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
{
assert(!bdrv_dirty_bitmap_frozen(bitmap));
bitmap->disabled = true;
}
+/* Called with BQL taken. */
void bdrv_enable_dirty_bitmap(BdrvDirtyBitmap *bitmap)
{
assert(!bdrv_dirty_bitmap_frozen(bitmap));
BlockDirtyInfoList *list = NULL;
BlockDirtyInfoList **plist = &list;
+ bdrv_dirty_bitmaps_lock(bs);
QLIST_FOREACH(bm, &bs->dirty_bitmaps, list) {
BlockDirtyInfo *info = g_new0(BlockDirtyInfo, 1);
BlockDirtyInfoList *entry = g_new0(BlockDirtyInfoList, 1);
*plist = entry;
plist = &entry->next;
}
+ bdrv_dirty_bitmaps_unlock(bs);
return list;
}
int64_t nr_sectors)
{
BdrvDirtyBitmap *bitmap;
+
+ if (QLIST_EMPTY(&bs->dirty_bitmaps)) {
+ return;
+ }
+
+ bdrv_dirty_bitmaps_lock(bs);
QLIST_FOREACH(bitmap, &bs->dirty_bitmaps, list) {
if (!bdrv_dirty_bitmap_enabled(bitmap)) {
continue;
}
hbitmap_set(bitmap->bitmap, cur_sector, nr_sectors);
}
+ bdrv_dirty_bitmaps_unlock(bs);
}
/**
static BdrvDirtyBitmap *block_dirty_bitmap_lookup(const char *node,
const char *name,
BlockDriverState **pbs,
- AioContext **paio,
Error **errp)
{
BlockDriverState *bs;
BdrvDirtyBitmap *bitmap;
- AioContext *aio_context;
if (!node) {
error_setg(errp, "Node cannot be NULL");
return NULL;
}
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
bitmap = bdrv_find_dirty_bitmap(bs, name);
if (!bitmap) {
error_setg(errp, "Dirty bitmap '%s' not found", name);
- goto fail;
+ return NULL;
}
if (pbs) {
*pbs = bs;
}
- if (paio) {
- *paio = aio_context;
- } else {
- aio_context_release(aio_context);
- }
return bitmap;
-
- fail:
- aio_context_release(aio_context);
- return NULL;
}
/* New and old BlockDriverState structs for atomic group operations */
state->bitmap = block_dirty_bitmap_lookup(action->node,
action->name,
&state->bs,
- &state->aio_context,
errp);
if (!state->bitmap) {
return;
bool has_granularity, uint32_t granularity,
Error **errp)
{
- AioContext *aio_context;
BlockDriverState *bs;
if (!name || name[0] == '\0') {
return;
}
- aio_context = bdrv_get_aio_context(bs);
- aio_context_acquire(aio_context);
-
if (has_granularity) {
if (granularity < 512 || !is_power_of_2(granularity)) {
error_setg(errp, "Granularity must be power of 2 "
"and at least 512");
- goto out;
+ return;
}
} else {
/* Default to cluster size, if available: */
}
bdrv_create_dirty_bitmap(bs, granularity, name, errp);
-
- out:
- aio_context_release(aio_context);
}
void qmp_block_dirty_bitmap_remove(const char *node, const char *name,
Error **errp)
{
- AioContext *aio_context;
BlockDriverState *bs;
BdrvDirtyBitmap *bitmap;
- bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
+ bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
if (!bitmap || !bs) {
return;
}
error_setg(errp,
"Bitmap '%s' is currently frozen and cannot be removed",
name);
- goto out;
+ return;
}
bdrv_dirty_bitmap_make_anon(bitmap);
bdrv_release_dirty_bitmap(bs, bitmap);
-
- out:
- aio_context_release(aio_context);
}
/**
void qmp_block_dirty_bitmap_clear(const char *node, const char *name,
Error **errp)
{
- AioContext *aio_context;
BdrvDirtyBitmap *bitmap;
BlockDriverState *bs;
- bitmap = block_dirty_bitmap_lookup(node, name, &bs, &aio_context, errp);
+ bitmap = block_dirty_bitmap_lookup(node, name, &bs, errp);
if (!bitmap || !bs) {
return;
}
error_setg(errp,
"Bitmap '%s' is currently frozen and cannot be modified",
name);
- goto out;
+ return;
} else if (!bdrv_dirty_bitmap_enabled(bitmap)) {
error_setg(errp,
"Bitmap '%s' is currently disabled and cannot be cleared",
name);
- goto out;
+ return;
}
bdrv_clear_dirty_bitmap(bitmap, NULL);
-
- out:
- aio_context_release(aio_context);
}
void hmp_drive_del(Monitor *mon, const QDict *qdict)