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author | Kevin Wolf <kwolf@redhat.com> | 2013-01-25 17:07:28 +0100 |
---|---|---|
committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-02-01 14:58:28 +0100 |
commit | 1a60657f5729bac57e70802eb17e67ad793400fd (patch) | |
tree | 02e1c660208721bcb97a3aefe4427bdb00ccfdb1 | |
parent | 5b7d7dfd198f06ec5edd0c857291c5035c5c060f (diff) | |
download | qemu-1a60657f5729bac57e70802eb17e67ad793400fd.zip qemu-1a60657f5729bac57e70802eb17e67ad793400fd.tar.gz qemu-1a60657f5729bac57e70802eb17e67ad793400fd.tar.bz2 |
cloop: Fix bdrv_open() error handling
Return -errno instead of -1 on errors. While touching the
code, fix a memory leak.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
-rw-r--r-- | block/cloop.c | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/block/cloop.c b/block/cloop.c index 5a0d0d8..8fe13e9 100644 --- a/block/cloop.c +++ b/block/cloop.c @@ -57,27 +57,32 @@ static int cloop_open(BlockDriverState *bs, int flags) { BDRVCloopState *s = bs->opaque; uint32_t offsets_size, max_compressed_block_size = 1, i; + int ret; bs->read_only = 1; /* read header */ - if (bdrv_pread(bs->file, 128, &s->block_size, 4) < 4) { - goto cloop_close; + ret = bdrv_pread(bs->file, 128, &s->block_size, 4); + if (ret < 0) { + return ret; } s->block_size = be32_to_cpu(s->block_size); - if (bdrv_pread(bs->file, 128 + 4, &s->n_blocks, 4) < 4) { - goto cloop_close; + ret = bdrv_pread(bs->file, 128 + 4, &s->n_blocks, 4); + if (ret < 0) { + return ret; } s->n_blocks = be32_to_cpu(s->n_blocks); /* read offsets */ offsets_size = s->n_blocks * sizeof(uint64_t); s->offsets = g_malloc(offsets_size); - if (bdrv_pread(bs->file, 128 + 4 + 4, s->offsets, offsets_size) < - offsets_size) { - goto cloop_close; + + ret = bdrv_pread(bs->file, 128 + 4 + 4, s->offsets, offsets_size); + if (ret < 0) { + goto fail; } + for(i=0;i<s->n_blocks;i++) { s->offsets[i] = be64_to_cpu(s->offsets[i]); if (i > 0) { @@ -92,7 +97,8 @@ static int cloop_open(BlockDriverState *bs, int flags) s->compressed_block = g_malloc(max_compressed_block_size + 1); s->uncompressed_block = g_malloc(s->block_size); if (inflateInit(&s->zstream) != Z_OK) { - goto cloop_close; + ret = -EINVAL; + goto fail; } s->current_block = s->n_blocks; @@ -101,8 +107,11 @@ static int cloop_open(BlockDriverState *bs, int flags) qemu_co_mutex_init(&s->lock); return 0; -cloop_close: - return -1; +fail: + g_free(s->offsets); + g_free(s->compressed_block); + g_free(s->uncompressed_block); + return ret; } static inline int cloop_read_block(BlockDriverState *bs, int block_num) |