Re: [Qemu-devel] [RFC V2 03/10] quorum: Add quorum_open().

[Stefan Hajnoczi <stefanha@gmail.com>]

On Tue, Aug 7, 2012 at 2:44 PM, Benoît Canet <benoit.canet@gmail.com> wrote:
> Signed-off-by: Benoit Canet <benoit@irqsave.net>
> ---
>  block/quorum.c |   62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 62 insertions(+)
>
> diff --git a/block/quorum.c b/block/quorum.c
> index e0405b6..de58ab8 100644
> --- a/block/quorum.c
> +++ b/block/quorum.c
> @@ -47,11 +47,73 @@ struct QuorumAIOCB {
>      int vote_ret;
>  };
>
> +/* Valid quorum filenames look like
> + * quorum:path/to/a_image:path/to/b_image:path/to/c_image
> + */
> +static int quorum_open(BlockDriverState *bs, const char *filename, int flags)
> +{
> +    BDRVQuorumState *s = bs->opaque;
> +    int ret, i;
> +    char *a, *b, *c, *filenames[3];
> +
> +    /* Parse the quorum: prefix */
> +    if (strncmp(filename, "quorum:", strlen("quorum:"))) {
> +        return -EINVAL;
> +    }
> +    a = g_strdup(filename + strlen("quorum:"));
> +
> +    /* Find separators */
> +    b = strchr(a, ':');
> +    if (b == NULL) {
> +        return -EINVAL;

Leaks a.  Same for returns below.

>  static BlockDriver bdrv_quorum = {
>      .format_name        = "quorum",
>      .protocol_name      = "quorum",
>
>      .instance_size      = sizeof(BDRVQuorumState),
> +
> +    .bdrv_file_open     = quorum_open,

Please squash quorum_close() into this commit so the g_strdup()
filesnames[] aren't leaked on close.