diff options
Diffstat (limited to 'block')
| -rw-r--r-- | block/qcow.c | 30 |
1 files changed, 19 insertions, 11 deletions
diff --git a/block/qcow.c b/block/qcow.c index ab36b2995c..35e21eb6b3 100644 --- a/block/qcow.c +++ b/block/qcow.c @@ -736,8 +736,6 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num, return -EINVAL; out_buf = g_malloc(s->cluster_size + (s->cluster_size / 1000) + 128); - if (!out_buf) - return -1; /* best compression, small window, no zlib header */ memset(&strm, 0, sizeof(strm)); @@ -745,8 +743,8 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num, Z_DEFLATED, -12, 9, Z_DEFAULT_STRATEGY); if (ret != 0) { - g_free(out_buf); - return -1; + ret = -EINVAL; + goto fail; } strm.avail_in = s->cluster_size; @@ -756,9 +754,9 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num, ret = deflate(&strm, Z_FINISH); if (ret != Z_STREAM_END && ret != Z_OK) { - g_free(out_buf); deflateEnd(&strm); - return -1; + ret = -EINVAL; + goto fail; } out_len = strm.next_out - out_buf; @@ -766,19 +764,29 @@ static int qcow_write_compressed(BlockDriverState *bs, int64_t sector_num, if (ret != Z_STREAM_END || out_len >= s->cluster_size) { /* could not compress: write normal cluster */ - bdrv_write(bs, sector_num, buf, s->cluster_sectors); + ret = bdrv_write(bs, sector_num, buf, s->cluster_sectors); + if (ret < 0) { + goto fail; + } } else { cluster_offset = get_cluster_offset(bs, sector_num << 9, 2, out_len, 0, 0); + if (cluster_offset == 0) { + ret = -EIO; + goto fail; + } + cluster_offset &= s->cluster_offset_mask; - if (bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len) != out_len) { - g_free(out_buf); - return -1; + ret = bdrv_pwrite(bs->file, cluster_offset, out_buf, out_len); + if (ret < 0) { + goto fail; } } + ret = 0; +fail: g_free(out_buf); - return 0; + return ret; } static coroutine_fn int qcow_co_flush(BlockDriverState *bs) |