The function should collect statistics, about used/unused by top-level
format driver space (in its .file) and allocation status
(data/zero/discarded/after-eof) of corresponding areas in this .file.
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
---
block.c | 16 ++++++++++++++
include/block/block.h | 3 +++
include/block/block_int.h | 2 ++
qapi/block-core.json | 55
+++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 76 insertions(+)
diff --git a/block.c b/block.c
index 50ba264143..7d720ae0c2 100644
--- a/block.c
+++ b/block.c
@@ -3407,6 +3407,22 @@ int64_t
bdrv_get_allocated_file_size(BlockDriverState *bs)
}
/**
+ * Collect format allocation info. See BlockFormatAllocInfo
definition in
+ * qapi/block-core.json.
+ */
+int bdrv_get_format_alloc_stat(BlockDriverState *bs,
BlockFormatAllocInfo *bfai)
+{
+ BlockDriver *drv = bs->drv;
+ if (!drv) {
+ return -ENOMEDIUM;
+ }
+ if (drv->bdrv_get_format_alloc_stat) {
+ return drv->bdrv_get_format_alloc_stat(bs, bfai);
+ }
+ return -ENOTSUP;
+}
+
+/**
* Return number of sectors on success, -errno on error.
*/
int64_t bdrv_nb_sectors(BlockDriverState *bs)
diff --git a/include/block/block.h b/include/block/block.h
index 9b355e92d8..646376a772 100644
--- a/include/block/block.h
+++ b/include/block/block.h
@@ -335,6 +335,9 @@ typedef enum {
int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res,
BdrvCheckMode fix);
+int bdrv_get_format_alloc_stat(BlockDriverState *bs,
+ BlockFormatAllocInfo *bfai);
+
/* The units of offset and total_work_size may be chosen
arbitrarily by the
* block driver; total_work_size may change during the course of
the amendment
* operation */
diff --git a/include/block/block_int.h b/include/block/block_int.h
index 8d3724cce6..458c715e99 100644
--- a/include/block/block_int.h
+++ b/include/block/block_int.h
@@ -208,6 +208,8 @@ struct BlockDriver {
int64_t (*bdrv_getlength)(BlockDriverState *bs);
bool has_variable_length;
int64_t (*bdrv_get_allocated_file_size)(BlockDriverState *bs);
+ int (*bdrv_get_format_alloc_stat)(BlockDriverState *bs,
+ BlockFormatAllocInfo *bfai);
int coroutine_fn (*bdrv_co_pwritev_compressed)(BlockDriverState
*bs,
uint64_t offset, uint64_t bytes, QEMUIOVector *qiov);
diff --git a/qapi/block-core.json b/qapi/block-core.json
index ea0b3e8b13..fd7b52bd69 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -139,6 +139,61 @@
'*format-specific': 'ImageInfoSpecific' } }
##
+# @BlockFormatAllocInfo:
+#
+#
+# Allocation relations between format file and underlying protocol
file.
+# All fields are in bytes.
+#