This patch is part of the Fast Virtual Disk (FVD) proposal.
See http://wiki.qemu.org/Features/FVD.
This patch adds FVD's implementation of the bdrv_get_info() interface.
Signed-off-by: Chunqiang Tang <ct...@us.ibm.com>
---
block/fvd-misc.c | 98 +++++++++++++++++++++++++++++++++++++++++++++++++++++-
1 files changed, 97 insertions(+), 1 deletions(-)
diff --git a/block/fvd-misc.c b/block/fvd-misc.c
index a42bfac..c515d74 100644
--- a/block/fvd-misc.c
+++ b/block/fvd-misc.c
@@ -11,6 +11,7 @@
*
*/
+static int read_fvd_header(BDRVFvdState * s, FvdHeader * header);
static void fvd_aio_cancel_bjnl_buf_write(FvdAIOCB * acb);
static void fvd_aio_cancel_bjnl_flush(FvdAIOCB * acb);
static void fvd_aio_cancel_read(FvdAIOCB * acb);
@@ -95,7 +96,102 @@ static int fvd_is_allocated(BlockDriverState * bs, int64_t
sector_num,
static int fvd_get_info(BlockDriverState * bs, BlockDriverInfo * bdi)
{
- return -ENOTSUP;
+ BDRVFvdState *s = bs->opaque;
+ FvdHeader header;
+
+ if (read_fvd_header(s, &header) < 0) {
+ return -1;
+ }
+
+ printf("========= Begin of FVD specific information ==================\n");
+ printf("magic\t\t\t\t\t\t%0X\n", header.magic);
+ printf("header_size\t\t\t\t\t%d\n", header.header_size);
+ printf("create_version\t\t\t\t\t%d\n", header.create_version);
+ printf("last_open_version\t\t\t\t%d\n", header.last_open_version);
+ printf("virtual_disk_size (bytes)\t\t\t%" PRId64 "\n",
+ header.virtual_disk_size);
+ printf("disk_metadata_size (bytes)\t\t\t%" PRId64 "\n",
header.data_offset);
+ if (header.data_file[0]) {
+ printf("data_file\t\t\t\t\t%s\n", header.data_file);
+ }
+ if (header.data_file_fmt[0]) {
+ printf("data_file_fmt\t\t\t\t\t%s\n", header.data_file_fmt);
+ }
+
+ if (header.table_offset > 0) {
+ printf("table_size (bytes)\t\t\t\t%" PRId64 "\n", header.table_size);
+ printf("avail_storage (bytes)\t\t\t\t%" PRId64 "\n",
+ s->avail_storage * 512);
+ printf("chunk_size (bytes)\t\t\t\t%" PRId64 "\n", header.chunk_size);
+ printf("used_chunks (bytes)\t\t\t\t%" PRId64 "\n",
+ s->used_storage * 512);
+ printf("storage_grow_unit (bytes)\t\t\t%" PRId64 "\n",
+ header.storage_grow_unit);
+ printf("table_offset (bytes)\t\t\t\t%" PRId64 "\n",
+ header.table_offset);
+ printf("table_size (bytes)\t\t\t\t%" PRId64 "\n", s->table_size);
+ printf("chunks_relocated\t\t\t\t%s\n", BOOL(s->chunks_relocated));
+
+ if (header.add_storage_cmd[0] != 0) {
+ printf("add_storage_cmd\t\t\t\t\t%s\n", header.add_storage_cmd);
+ }
+ }
+
+ printf("clean_shutdown\t\t\t\t\t%s\n", BOOL(header.clean_shutdown));
+ if (header.journal_size > 0) {
+ printf("journal_offset\t\t\t\t\t%" PRId64 "\n", header.journal_offset);
+ printf("journal_size\t\t\t\t\t%" PRId64 "\n", header.journal_size);
+ printf("stable_journal_epoch\t\t\t\t%" PRId64 "\n",
+ header.stable_journal_epoch);
+ printf("journal_buf_size (bytes)\t\t\t%" PRId64 "\n",
+ header.journal_buf_size);
+ printf("journal_clean_buf_period (ms)\t\t\t%" PRId64 "\n",
+ header.journal_clean_buf_period);
+ }
+
+ if (header.base_img[0] != 0) {
+ printf("base_img_fully_prefetched\t\t\t%s\n",
+ BOOL(header.base_img_fully_prefetched));
+ printf("base_img\t\t\t\t\t%s\n", header.base_img);
+ if (header.base_img_fmt[0]) {
+ printf("base_img_fmt\t\t\t\t\t%s\n", header.base_img_fmt);
+ }
+ printf("base_img_size (bytes)\t\t\t\t%" PRId64 "\n",
+ header.base_img_size);
+ printf("bitmap_offset (bytes)\t\t\t\t%" PRId64 "\n",
+ header.bitmap_offset);
+ printf("bitmap_size (bytes)\t\t\t\t%" PRId64 "\n", header.bitmap_size);
+ printf("block_size\t\t\t\t\t%" PRId64 "\n", header.block_size);
+ printf("copy_on_read\t\t\t\t\t%s\n", BOOL(header.copy_on_read));
+ printf("max_outstanding_copy_on_read_data (bytes)\t%" PRId64 "\n",
+ header.max_outstanding_copy_on_read_data);
+ printf("need_zero_init\t\t\t\t\t%s\n", BOOL(header.need_zero_init));
+ printf("prefetch_start_delay (sec)\t\t\t%" PRId64 "\n",
+ header.prefetch_start_delay);
+ printf("num_prefetch_slots\t\t\t\t%d\n", header.num_prefetch_slots);
+ printf("bytes_per_prefetch\t\t\t\t%" PRIu64 "\n",
+ header.bytes_per_prefetch);
+ printf("prefetch_over_threshold_throttle_time (ms)\t%" PRIu64 "\n",
+ header.prefetch_throttle_time);
+ printf("prefetch_read_throughput_measure_time (ms)\t%" PRIu64 "\n",
+ header.prefetch_read_throughput_measure_time);
+ printf("prefetch_write_throughput_measure_time (ms)\t%" PRIu64 "\n",
+ header.prefetch_write_throughput_measure_time);
+ printf("prefetch_min_read_throughput (KB/s)\t\t%" PRIu64 "\n",
+ header.prefetch_min_read_throughput);
+ printf("prefetch_min_write_throughput (KB/s)\t\t%" PRIu64 "\n",
+ header.prefetch_min_write_throughput);
+ printf("prefetch_max_read_throughput (KB/s)\t\t%" PRIu64 "\n",
+ header.prefetch_max_read_throughput);
+ printf("prefetch_max_write_throughput (KB/s)\t\t%" PRIu64 "\n",
+ header.prefetch_max_write_throughput);
+ }
+
+ printf("========= End of FVD specific information ====================\n");
+
+ bdi->cluster_size = 0;
+ bdi->vm_state_offset = 0;
+ return 0;
}
static int fvd_has_zero_init(BlockDriverState * bs)
--
1.7.0.4
