diff options
| -rw-r--r-- | block/qcow2.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/block/qcow2.c b/block/qcow2.c index 840f289a48..c5c17734d7 100644 --- a/block/qcow2.c +++ b/block/qcow2.c @@ -3929,8 +3929,8 @@ fail: * @src - source buffer, @src_size bytes * * Returns: compressed size on success - * -1 destination buffer is not enough to store compressed data - * -2 on any other error + * -ENOMEM destination buffer is not enough to store compressed data + * -EIO on any other error */ static ssize_t qcow2_compress(void *dest, size_t dest_size, const void *src, size_t src_size) @@ -3943,7 +3943,7 @@ static ssize_t qcow2_compress(void *dest, size_t dest_size, ret = deflateInit2(&strm, Z_DEFAULT_COMPRESSION, Z_DEFLATED, -12, 9, Z_DEFAULT_STRATEGY); if (ret != Z_OK) { - return -2; + return -EIO; } /* strm.next_in is not const in old zlib versions, such as those used on @@ -3957,7 +3957,7 @@ static ssize_t qcow2_compress(void *dest, size_t dest_size, if (ret == Z_STREAM_END) { ret = dest_size - strm.avail_out; } else { - ret = (ret == Z_OK ? -1 : -2); + ret = (ret == Z_OK ? -ENOMEM : -EIO); } deflateEnd(&strm); @@ -4096,7 +4096,7 @@ qcow2_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset, BDRVQcow2State *s = bs->opaque; QEMUIOVector hd_qiov; int ret; - size_t out_len; + ssize_t out_len; uint8_t *buf, *out_buf; uint64_t cluster_offset; @@ -4135,16 +4135,16 @@ qcow2_co_pwritev_compressed(BlockDriverState *bs, uint64_t offset, out_len = qcow2_co_compress(bs, out_buf, s->cluster_size - 1, buf, s->cluster_size); - if (out_len == -2) { - ret = -EINVAL; - goto fail; - } else if (out_len == -1) { + if (out_len == -ENOMEM) { /* could not compress: write normal cluster */ ret = qcow2_co_pwritev(bs, offset, bytes, qiov, 0); if (ret < 0) { goto fail; } goto success; + } else if (out_len < 0) { + ret = -EINVAL; + goto fail; } qemu_co_mutex_lock(&s->lock); |