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parallels: update used bitmap in allocate_cluster 

We should extend the bitmap if the file is extended and set the bit in
the image used bitmap once the cluster is allocated. Sanity check at
that moment also looks like a good idea.

Signed-off-by: Denis V. Lunev <den@openvz.org>
Reviewed-by: Alexander Ivanov <alexander.ivanov@virtuozzo.com>
This commit is contained in:
Denis V. Lunev 2023-09-18 20:00:54 +02:00
parent 73194d3f54
commit eeb1e6dc49
1 changed files with 14 additions and 0 deletions

14
block/parallels.c
View File

@ -282,6 +282,8 @@ allocate_clusters(BlockDriverState *bs, int64_t sector_num,
return len;
}
if (s->data_end + space > (len >> BDRV_SECTOR_BITS)) {
uint32_t new_usedsize;
space += s->prealloc_size;
/*
* We require the expanded size to read back as zero. If the
@ -305,6 +307,12 @@ allocate_clusters(BlockDriverState *bs, int64_t sector_num,
if (ret < 0) {
return ret;
}
new_usedsize = s->used_bmap_size +
(space << BDRV_SECTOR_BITS) / s->cluster_size;
s->used_bmap = bitmap_zero_extend(s->used_bmap, s->used_bmap_size,
new_usedsize);
s->used_bmap_size = new_usedsize;
}
/*
@ -336,6 +344,12 @@ allocate_clusters(BlockDriverState *bs, int64_t sector_num,
}
}
ret = mark_used(bs, s->used_bmap, s->used_bmap_size,
s->data_end << BDRV_SECTOR_BITS, to_allocate);
if (ret < 0) {
/* Image consistency is broken. Alarm! */
return ret;
}
for (i = 0; i < to_allocate; i++) {
parallels_set_bat_entry(s, idx + i, s->data_end / s->off_multiplier);
s->data_end += s->tracks;