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author | Kevin Wolf <kwolf@redhat.com> | 2011-10-26 11:21:50 +0200 |
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committer | Kevin Wolf <kwolf@redhat.com> | 2011-10-28 19:25:49 +0200 |
commit | 64ebe71aa0e498d24e8c02b133192142fce3a0d0 (patch) | |
tree | 86965ca66a532d500d909f13bf66ae176595f82f /block | |
parent | 2b5728164fcf5211bbae8d3c2fc6df62dd6b2295 (diff) | |
download | hqemu-64ebe71aa0e498d24e8c02b133192142fce3a0d0.zip hqemu-64ebe71aa0e498d24e8c02b133192142fce3a0d0.tar.gz |
qcow: Fix bdrv_write_compressed error handling
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
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 ab36b29..35e21eb 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) |