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qemu-img: add image fragmentation statistics

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Discussion can be found at:
http://patchwork.ozlabs.org/patch/128730/

This patch add image fragmentation statistics while using qemu-img check.

Signed-off-by: Dong Xu Wang <wdongxu@linux.vnet.ibm.com>
Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Dong Xu Wang 2012-03-15 20:13:31 +08:00 committed by Kevin Wolf
parent dc534f8fc0
commit f8111c241a
2 changed files with 15 additions and 1 deletions
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7
block.h
View file

@ -17,6 +17,12 @@ typedef struct BlockDriverInfo {
int64_t vm_state_offset;
} BlockDriverInfo;
typedef struct BlockFragInfo {
uint64_t allocated_clusters;
uint64_t total_clusters;
uint64_t fragmented_clusters;
} BlockFragInfo;
typedef struct QEMUSnapshotInfo {
char id_str[128]; /* unique snapshot id */
/* the following fields are informative. They are not needed for
@ -175,6 +181,7 @@ typedef struct BdrvCheckResult {
int corruptions;
int leaks;
int check_errors;
BlockFragInfo bfi;
} BdrvCheckResult;
int bdrv_check(BlockDriverState *bs, BdrvCheckResult *res);

9
qemu-img.c
View file

@ -428,6 +428,13 @@ static int img_check(int argc, char **argv)
}
}
if (result.bfi.total_clusters != 0 && result.bfi.allocated_clusters != 0) {
printf("%" PRId64 "/%" PRId64 "= %0.2f%% allocated, %0.2f%% fragmented\n",
result.bfi.allocated_clusters, result.bfi.total_clusters,
result.bfi.allocated_clusters * 100.0 / result.bfi.total_clusters,
result.bfi.fragmented_clusters * 100.0 / result.bfi.allocated_clusters);
}
bdrv_delete(bs);
if (ret < 0 || result.check_errors) {
@ -716,7 +723,7 @@ static int img_convert(int argc, char **argv)
ret = -1;
goto out;
}
qemu_progress_init(progress, 2.0);
qemu_progress_print(0, 100);