mirror of
https://gitlab.com/qemu-project/qemu
synced 2024-09-06 18:05:37 +00:00
block/parallels: implement parallels_check method of block driver
The check is very simple at the moment. It calculates necessary stats and fix only the following errors: - space leak at the end of the image. This would happens due to preallocation - clusters outside the image are zeroed. Nothing else could be done here Signed-off-by: Denis V. Lunev <den@openvz.org> Reviewed-by: Roman Kagan <rkagan@parallels.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Roman Kagan <rkagan@parallels.com> Message-id: 1430207220-24458-20-git-send-email-den@openvz.org CC: Kevin Wolf <kwolf@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
parent
23d6bd3bd1
commit
49ad646731
|
@ -242,6 +242,90 @@ static coroutine_fn int parallels_co_readv(BlockDriverState *bs,
|
|||
return ret;
|
||||
}
|
||||
|
||||
|
||||
static int parallels_check(BlockDriverState *bs, BdrvCheckResult *res,
|
||||
BdrvCheckMode fix)
|
||||
{
|
||||
BDRVParallelsState *s = bs->opaque;
|
||||
int64_t size, prev_off, high_off;
|
||||
int ret;
|
||||
uint32_t i;
|
||||
bool flush_bat = false;
|
||||
int cluster_size = s->tracks << BDRV_SECTOR_BITS;
|
||||
|
||||
size = bdrv_getlength(bs->file);
|
||||
if (size < 0) {
|
||||
res->check_errors++;
|
||||
return size;
|
||||
}
|
||||
|
||||
res->bfi.total_clusters = s->bat_size;
|
||||
res->bfi.compressed_clusters = 0; /* compression is not supported */
|
||||
|
||||
high_off = 0;
|
||||
prev_off = 0;
|
||||
for (i = 0; i < s->bat_size; i++) {
|
||||
int64_t off = bat2sect(s, i) << BDRV_SECTOR_BITS;
|
||||
if (off == 0) {
|
||||
prev_off = 0;
|
||||
continue;
|
||||
}
|
||||
|
||||
/* cluster outside the image */
|
||||
if (off > size) {
|
||||
fprintf(stderr, "%s cluster %u is outside image\n",
|
||||
fix & BDRV_FIX_ERRORS ? "Repairing" : "ERROR", i);
|
||||
res->corruptions++;
|
||||
if (fix & BDRV_FIX_ERRORS) {
|
||||
prev_off = 0;
|
||||
s->bat_bitmap[i] = 0;
|
||||
res->corruptions_fixed++;
|
||||
flush_bat = true;
|
||||
continue;
|
||||
}
|
||||
}
|
||||
|
||||
res->bfi.allocated_clusters++;
|
||||
if (off > high_off) {
|
||||
high_off = off;
|
||||
}
|
||||
|
||||
if (prev_off != 0 && (prev_off + cluster_size) != off) {
|
||||
res->bfi.fragmented_clusters++;
|
||||
}
|
||||
prev_off = off;
|
||||
}
|
||||
|
||||
if (flush_bat) {
|
||||
ret = bdrv_pwrite_sync(bs->file, 0, s->header, s->header_size);
|
||||
if (ret < 0) {
|
||||
res->check_errors++;
|
||||
return ret;
|
||||
}
|
||||
}
|
||||
|
||||
res->image_end_offset = high_off + cluster_size;
|
||||
if (size > res->image_end_offset) {
|
||||
int64_t count;
|
||||
count = DIV_ROUND_UP(size - res->image_end_offset, cluster_size);
|
||||
fprintf(stderr, "%s space leaked at the end of the image %" PRId64 "\n",
|
||||
fix & BDRV_FIX_LEAKS ? "Repairing" : "ERROR",
|
||||
size - res->image_end_offset);
|
||||
res->leaks += count;
|
||||
if (fix & BDRV_FIX_LEAKS) {
|
||||
ret = bdrv_truncate(bs->file, res->image_end_offset);
|
||||
if (ret < 0) {
|
||||
res->check_errors++;
|
||||
return ret;
|
||||
}
|
||||
res->leaks_fixed += count;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int parallels_create(const char *filename, QemuOpts *opts, Error **errp)
|
||||
{
|
||||
int64_t total_size, cl_size;
|
||||
|
@ -449,6 +533,7 @@ static BlockDriver bdrv_parallels = {
|
|||
.bdrv_co_writev = parallels_co_writev,
|
||||
|
||||
.bdrv_create = parallels_create,
|
||||
.bdrv_check = parallels_check,
|
||||
.create_opts = ¶llels_create_opts,
|
||||
};
|
||||
|
||||
|
|
Loading…
Reference in a new issue