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qcow2: Fix error handling in qcow2_grow_l1_table 

Return the appropriate error value instead of always using EIO. Don't free the
L1 table on errors, we still need it.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
(cherry picked from commit fb8fa77ce1)
This commit is contained in:
Kevin Wolf 2010-01-20 15:02:58 +01:00 committed by Anthony Liguori
parent 848f874ca1
commit cb2ae96bf6
1 changed files with 6 additions and 4 deletions
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10
block/qcow2-cluster.c
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@ -67,9 +67,10 @@ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size)
/* set new table */
cpu_to_be32w((uint32_t*)data, new_l1_size);
cpu_to_be64w((uint64_t*)(data + 4), new_l1_table_offset);
if (bdrv_pwrite(s->hd, offsetof(QCowHeader, l1_size), data,
sizeof(data)) != sizeof(data))
ret = bdrv_pwrite(s->hd, offsetof(QCowHeader, l1_size), data,sizeof(data));
if (ret != sizeof(data)) {
goto fail;
}
qemu_free(s->l1_table);
qcow2_free_clusters(bs, s->l1_table_offset, s->l1_size * sizeof(uint64_t));
s->l1_table_offset = new_l1_table_offset;
@ -77,8 +78,9 @@ int qcow2_grow_l1_table(BlockDriverState *bs, int min_size)
s->l1_size = new_l1_size;
return 0;
fail:
qemu_free(s->l1_table);
return -EIO;
qemu_free(new_l1_table);
qcow2_free_clusters(bs, new_l1_table_offset, new_l1_size2);
return ret < 0 ? ret : -EIO;
}
void qcow2_l2_cache_reset(BlockDriverState *bs)