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[Qemu-block] [PATCH 1/4] block: add bdrv_get_format_alloc_stat format in
From: |
Vladimir Sementsov-Ogievskiy |
Subject: |
[Qemu-block] [PATCH 1/4] block: add bdrv_get_format_alloc_stat format interface |
Date: |
Tue, 30 May 2017 13:48:54 +0300 |
The function should collect statistics, about allocted/unallocated by
top-level format driver space (in its .file) and allocation status
(allocated/hole/after eof) of corresponding areas in this .file.
Signed-off-by: Vladimir Sementsov-Ogievskiy <address@hidden>
---
block.c | 16 ++++++++++++++++
include/block/block.h | 3 +++
include/block/block_int.h | 2 ++
qapi/block-core.json | 26 ++++++++++++++++++++++++++
4 files changed, 47 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..365070b3eb 100644
--- a/qapi/block-core.json
+++ b/qapi/block-core.json
@@ -139,6 +139,32 @@
'*format-specific': 'ImageInfoSpecific' } }
##
+# @BlockFormatAllocInfo:
+#
+# Information about allocations, including metadata. All fields are in bytes.
+#
+# @alloc_alloc: allocated by format driver and allocated in underlying file
+#
+# @alloc_hole: allocated by format driver but actually is a hole in
+# underlying file
+#
+# @alloc_overhead: allocated by format driver after end of underlying file
+#
+# @hole_alloc: not allocated by format driver but allocated in underlying file
+#
+# @hole_hole: not allocated by format driver hole in underlying file
+#
+# Since: 2.10
+#
+##
+{ 'struct': 'BlockFormatAllocInfo',
+ 'data': {'alloc_alloc': 'uint64',
+ 'alloc_hole': 'uint64',
+ 'alloc_overhead': 'uint64',
+ 'hole_alloc': 'uint64',
+ 'hole_hole': 'uint64' } }
+
+##
# @ImageCheck:
#
# Information about a QEMU image file check
--
2.11.1