From: Paul Durrant <pdurrant@gmail.com>
To: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Cc: "Kevin Wolf" <kwolf@redhat.com>,
"Stefano Stabellini" <sstabellini@kernel.org>,
"Laszlo Ersek" <lersek@redhat.com>,
qemu-block@nongnu.org,
"Philippe Mathieu-Daudé" <philmd@redhat.com>,
"Cornelia Huck" <cohuck@redhat.com>, "Greg Kurz" <groug@kaod.org>,
qemu-devel@nongnu.org, "Gerd Hoffmann" <kraxel@redhat.com>,
"Stefan Hajnoczi" <stefanha@redhat.com>,
"Anthony Perard" <anthony.perard@citrix.com>,
xen-devel <xen-devel@lists.xenproject.org>,
"Max Reitz" <mreitz@redhat.com>,
"Michael Roth" <mdroth@linux.vnet.ibm.com>,
"Markus Armbruster" <armbru@redhat.com>,
"Stefan Berger" <stefanb@linux.ibm.com>
Subject: Re: [PATCH v6 02/11] error: auto propagated local_err
Date: Mon, 13 Jan 2020 08:50:11 +0000 [thread overview]
Message-ID: <CACCGGhD+v3cPdrU0ZCctO3SCpN7yHJcd9=J6AwTrrYWZdHrTZA@mail.gmail.com> (raw)
In-Reply-To: <20200110194158.14190-3-vsementsov@virtuozzo.com>
On Fri, 10 Jan 2020 at 19:42, Vladimir Sementsov-Ogievskiy
<vsementsov@virtuozzo.com> wrote:
[snip]
> +/*
> + * ERRP_AUTO_PROPAGATE
> + *
> + * This macro is created to be the first line of a function which use
> + * Error **errp parameter to report error. It's needed only in cases where we
> + * want to use error_prepend, error_append_hint or dereference *errp. It's
> + * still safe (but useless) in other cases.
> + *
> + * If errp is NULL or points to error_fatal, it is rewritten to point to a
> + * local Error object, which will be automatically propagated to the original
> + * errp on function exit (see error_propagator_cleanup).
> + *
> + * After invocation of this macro it is always safe to dereference errp
> + * (as it's not NULL anymore) and to add information (by error_prepend or
> + * error_append_hint)
> + * (as, if it was error_fatal, we swapped it with a local_error to be
> + * propagated on cleanup).
> + *
> + * Note: we don't wrap the error_abort case, as we want resulting coredump
> + * to point to the place where the error happened, not to error_propagate.
> + */
> +#define ERRP_AUTO_PROPAGATE() \
> + g_auto(ErrorPropagator) _auto_errp_prop = {.errp = errp}; \
> + errp = ((errp == NULL || *errp == error_fatal) \
Perhaps !errp rather than errp == NULL, for brevity.
Paul
> + ? &_auto_errp_prop.local_err : errp)
> +
> /*
> * Special error destination to abort on error.
> * See error_setg() and error_propagate() for details.
> --
> 2.21.0
>
next prev parent reply other threads:[~2020-01-13 8:51 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 19:41 [PATCH v6 00/11] error: auto propagated local_err part I Vladimir Sementsov-Ogievskiy
2020-01-10 19:41 ` [PATCH v6 01/11] qapi/error: add (Error **errp) cleaning APIs Vladimir Sementsov-Ogievskiy
2020-01-15 7:46 ` Greg Kurz
2020-01-17 13:15 ` Eric Blake
2020-01-10 19:41 ` [PATCH v6 02/11] error: auto propagated local_err Vladimir Sementsov-Ogievskiy
2020-01-13 8:50 ` Paul Durrant [this message]
2020-01-13 9:25 ` Vladimir Sementsov-Ogievskiy
2020-01-15 18:33 ` Greg Kurz
2020-01-17 14:18 ` Eric Blake
2020-01-10 19:41 ` [PATCH v6 03/11] scripts: add coccinelle script to use auto propagated errp Vladimir Sementsov-Ogievskiy
2020-01-17 14:24 ` Eric Blake
2020-01-17 14:50 ` Vladimir Sementsov-Ogievskiy
2020-01-10 19:41 ` [PATCH v6 04/11] hw/sd/ssi-sd: fix error handling in ssi_sd_realize Vladimir Sementsov-Ogievskiy
2020-01-17 14:26 ` Eric Blake
2020-01-10 19:41 ` [PATCH v6 05/11] SD (Secure Card): introduce ERRP_AUTO_PROPAGATE Vladimir Sementsov-Ogievskiy
2020-01-10 19:41 ` [PATCH v6 06/11] pflash: " Vladimir Sementsov-Ogievskiy
2020-01-10 19:41 ` [PATCH v6 07/11] fw_cfg: " Vladimir Sementsov-Ogievskiy
2020-01-10 19:41 ` [PATCH v6 08/11] virtio-9p: " Vladimir Sementsov-Ogievskiy
2020-01-13 10:40 ` Greg Kurz
2020-01-10 19:41 ` [PATCH v6 09/11] TPM: " Vladimir Sementsov-Ogievskiy
2020-01-10 19:41 ` [PATCH v6 10/11] nbd: " Vladimir Sementsov-Ogievskiy
2020-01-10 19:41 ` [PATCH v6 11/11] xen: " Vladimir Sementsov-Ogievskiy
2020-01-13 8:57 ` Paul Durrant
2020-01-13 9:25 ` Vladimir Sementsov-Ogievskiy
2020-01-10 20:22 ` [Xen-devel] [PATCH v6 00/11] error: auto propagated local_err part I no-reply
2020-01-30 12:36 ` Vladimir Sementsov-Ogievskiy
2020-01-30 16:50 ` Markus Armbruster
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