diff options
| -rw-r--r-- | block.c | 8 | ||||
| -rw-r--r-- | blockdev.c | 34 | ||||
| -rw-r--r-- | include/block/block.h | 1 | ||||
| -rw-r--r-- | qapi/block-core.json | 14 | ||||
| -rw-r--r-- | qmp-commands.hx | 29 |
5 files changed, 86 insertions, 0 deletions
@@ -63,6 +63,7 @@ struct BdrvDirtyBitmap { HBitmap *bitmap; BdrvDirtyBitmap *successor; + int64_t size; char *name; bool disabled; QLIST_ENTRY(BdrvDirtyBitmap) list; @@ -5557,6 +5558,7 @@ BdrvDirtyBitmap *bdrv_create_dirty_bitmap(BlockDriverState *bs, } bitmap = g_new0(BdrvDirtyBitmap, 1); bitmap->bitmap = hbitmap_alloc(bitmap_size, ctz32(sector_granularity)); + bitmap->size = bitmap_size; bitmap->name = g_strdup(name); bitmap->disabled = false; QLIST_INSERT_HEAD(&bs->dirty_bitmaps, bitmap, list); @@ -5759,6 +5761,12 @@ void bdrv_reset_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, hbitmap_reset(bitmap->bitmap, cur_sector, nr_sectors); } +void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap) +{ + assert(bdrv_dirty_bitmap_enabled(bitmap)); + hbitmap_reset(bitmap->bitmap, 0, bitmap->size); +} + static void bdrv_set_dirty(BlockDriverState *bs, int64_t cur_sector, int nr_sectors) { diff --git a/blockdev.c b/blockdev.c index 62d862cf01..5905946f0b 100644 --- a/blockdev.c +++ b/blockdev.c @@ -2079,6 +2079,40 @@ void qmp_block_dirty_bitmap_remove(const char *node, const char *name, aio_context_release(aio_context); } +/** + * Completely clear a bitmap, for the purposes of synchronizing a bitmap + * immediately after a full backup operation. + */ +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); + if (!bitmap || !bs) { + return; + } + + if (bdrv_dirty_bitmap_frozen(bitmap)) { + error_setg(errp, + "Bitmap '%s' is currently frozen and cannot be modified", + name); + goto out; + } else if (!bdrv_dirty_bitmap_enabled(bitmap)) { + error_setg(errp, + "Bitmap '%s' is currently disabled and cannot be cleared", + name); + goto out; + } + + bdrv_clear_dirty_bitmap(bitmap); + + out: + aio_context_release(aio_context); +} + int hmp_drive_del(Monitor *mon, const QDict *qdict, QObject **ret_data) { const char *id = qdict_get_str(qdict, "id"); diff --git a/include/block/block.h b/include/block/block.h index 035cf7bb4c..12bf145b02 100644 --- a/include/block/block.h +++ b/include/block/block.h @@ -479,6 +479,7 @@ void bdrv_set_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t cur_sector, int nr_sectors); void bdrv_reset_dirty_bitmap(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, int64_t cur_sector, int nr_sectors); +void bdrv_clear_dirty_bitmap(BdrvDirtyBitmap *bitmap); void bdrv_dirty_iter_init(BlockDriverState *bs, BdrvDirtyBitmap *bitmap, struct HBitmapIter *hbi); void bdrv_set_dirty_iter(struct HBitmapIter *hbi, int64_t offset); diff --git a/qapi/block-core.json b/qapi/block-core.json index 8a4c7f21fc..e275dc2c94 100644 --- a/qapi/block-core.json +++ b/qapi/block-core.json @@ -1022,6 +1022,20 @@ 'data': 'BlockDirtyBitmap' } ## +# @block-dirty-bitmap-clear +# +# Clear (reset) a dirty bitmap on the device +# +# Returns: nothing on success +# If @node is not a valid block device, DeviceNotFound +# If @name is not found, GenericError with an explanation +# +# Since 2.4 +## +{ 'command': 'block-dirty-bitmap-clear', + 'data': 'BlockDirtyBitmap' } + +## # @block_set_io_throttle: # # Change I/O throttle limits for a block drive. diff --git a/qmp-commands.hx b/qmp-commands.hx index 9b10d3d2e8..213508fe5d 100644 --- a/qmp-commands.hx +++ b/qmp-commands.hx @@ -1364,6 +1364,35 @@ Example: EQMP { + .name = "block-dirty-bitmap-clear", + .args_type = "node:B,name:s", + .mhandler.cmd_new = qmp_marshal_input_block_dirty_bitmap_clear, + }, + +SQMP + +block-dirty-bitmap-clear +------------------------ +Since 2.4 + +Reset the dirty bitmap associated with a node so that an incremental backup +from this point in time forward will only backup clusters modified after this +clear operation. + +Arguments: + +- "node": device/node on which to remove dirty bitmap (json-string) +- "name": name of the dirty bitmap to remove (json-string) + +Example: + +-> { "execute": "block-dirty-bitmap-clear", "arguments": { "node": "drive0", + "name": "bitmap0" } } +<- { "return": {} } + +EQMP + + { .name = "blockdev-snapshot-sync", .args_type = "device:s?,node-name:s?,snapshot-file:s,snapshot-node-name:s?,format:s?,mode:s?", .mhandler.cmd_new = qmp_marshal_input_blockdev_snapshot_sync, |