Re: [PATCH v6] 9pfs: well form error hint helpers

[Greg Kurz <groug@kaod.org>]

On Mon, 2 Dec 2019 09:36:21 +0000
Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> wrote:

> 28.11.2019 1:37, Greg Kurz wrote:
> > On Wed, 27 Nov 2019 22:15:49 +0300
> > Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> wrote:
> > 
> >> Make error_append_security_model_hint and
> >> error_append_socket_sockfd_hint hint append helpers well formed:
> >> rename errp to errp_in, as it is IN-parameter here (which is unusual
> >> for errp).
> >>
> >> Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
> >> Acked-by: Greg Kurz <groug@kaod.org>
> >> ---
> >>
> >> v6: add Greg's a-b
> >>
> > 
> > I've already pushed that to my 9p-next branch:
> > 
> > https://github.com/gkurz/qemu/commits/9p-next
> 
> 
> Markus proposed to use Error *const *errp for such cases (among other
> things)
> 
> So, seems there would be v7, the current version is here:
> git://repo.or.cz/qemu/armbru.git branch error-prep
> 
> Discussion is here:
> https://lists.gnu.org/archive/html/qemu-devel/2019-11/msg04633.html
> and here:
> https://lists.gnu.org/archive/html/qemu-devel/2019-11/msg04636.html
> 

Ok, this makes sense. It's cleaner and it addresses your concern
with coccinelle, so I've dropped the patch from my 9p-next branch.

> > 
> > 
> >>   hw/9pfs/9p-local.c | 4 ++--
> >>   hw/9pfs/9p-proxy.c | 5 +++--
> >>   2 files changed, 5 insertions(+), 4 deletions(-)
> >>
> >> diff --git a/hw/9pfs/9p-local.c b/hw/9pfs/9p-local.c
> >> index 4708c0bd89..76fa1858b7 100644
> >> --- a/hw/9pfs/9p-local.c
> >> +++ b/hw/9pfs/9p-local.c
> >> @@ -1473,9 +1473,9 @@ static void local_cleanup(FsContext *ctx)
> >>       g_free(data);
> >>   }
> >>   
> >> -static void error_append_security_model_hint(Error **errp)
> >> +static void error_append_security_model_hint(Error **errp_in)
> >>   {
> >> -    error_append_hint(errp, "Valid options are: security_model="
> >> +    error_append_hint(errp_in, "Valid options are: security_model="
> >>                         "[passthrough|mapped-xattr|mapped-file|none]\n");
> >>   }
> >>   
> >> diff --git a/hw/9pfs/9p-proxy.c b/hw/9pfs/9p-proxy.c
> >> index 97ab9c58a5..9e29abc3ef 100644
> >> --- a/hw/9pfs/9p-proxy.c
> >> +++ b/hw/9pfs/9p-proxy.c
> >> @@ -1114,9 +1114,10 @@ static int connect_namedsocket(const char *path, Error **errp)
> >>       return sockfd;
> >>   }
> >>   
> >> -static void error_append_socket_sockfd_hint(Error **errp)
> >> +static void error_append_socket_sockfd_hint(Error **errp_in)
> >>   {
> >> -    error_append_hint(errp, "Either specify socket=/some/path where /some/path"
> >> +    error_append_hint(errp_in,
> >> +                      "Either specify socket=/some/path where /some/path"
> >>                         " points to a listening AF_UNIX socket or sock_fd=fd"
> >>                         " where fd is a file descriptor to a connected AF_UNIX"
> >>                         " socket\n");
> > 
> 
>