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authorKevin Wolf <kwolf@redhat.com>2013-01-25 17:07:28 +0100
committerStefan Hajnoczi <stefanha@redhat.com>2013-02-01 14:58:28 +0100
commit1a60657f5729bac57e70802eb17e67ad793400fd (patch)
tree02e1c660208721bcb97a3aefe4427bdb00ccfdb1
parent5b7d7dfd198f06ec5edd0c857291c5035c5c060f (diff)
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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.c29
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)