From eeb1e6dc49e7a550c8f1d843a707b93e11cabf8b Mon Sep 17 00:00:00 2001
From: "Denis V. Lunev" <den@openvz.org>
Date: Mon, 18 Sep 2023 20:00:54 +0200
Subject: [PATCH] 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>
---
block/parallels.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/block/parallels.c b/block/parallels.c
index 3df73aa8a05..ec35237119a 100644
--- a/block/parallels.c
+++ b/block/parallels.c
@@ -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;
--
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