Re: [Qemu-devel] [PATCH 01/11] chardev: add error reporting for qemu_chr_new_from_opts

[Paolo Bonzini <pbonzini@redhat.com>]

Il 07/01/2013 14:55, Gerd Hoffmann ha scritto:
> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>

> ---
>  include/char/char.h |    3 ++-
>  qemu-char.c         |   24 +++++++++++++++---------
>  vl.c                |    9 ++++++---
>  3 files changed, 23 insertions(+), 13 deletions(-)
> 
> diff --git a/include/char/char.h b/include/char/char.h
> index baa5d03..1952a10 100644
> --- a/include/char/char.h
> +++ b/include/char/char.h
> @@ -89,7 +89,8 @@ struct CharDriverState {
>   * Returns: a new character backend
>   */
>  CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
> -                                    void (*init)(struct CharDriverState *s));
> +                                    void (*init)(struct CharDriverState *s),
> +                                    Error **errp);
>  
>  /**
>   * @qemu_chr_new:
> diff --git a/qemu-char.c b/qemu-char.c
> index f41788c..91f64e9 100644
> --- a/qemu-char.c
> +++ b/qemu-char.c
> @@ -2779,19 +2779,20 @@ static const struct {
>  };
>  
>  CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
> -                                    void (*init)(struct CharDriverState *s))
> +                                    void (*init)(struct CharDriverState *s),
> +                                    Error **errp)
>  {
>      CharDriverState *chr;
>      int i;
>  
>      if (qemu_opts_id(opts) == NULL) {
> -        fprintf(stderr, "chardev: no id specified\n");
> +        error_setg(errp, "chardev: no id specified\n");
>          return NULL;
>      }
>  
>      if (qemu_opt_get(opts, "backend") == NULL) {
> -        fprintf(stderr, "chardev: \"%s\" missing backend\n",
> -                qemu_opts_id(opts));
> +        error_setg(errp, "chardev: \"%s\" missing backend\n",
> +                   qemu_opts_id(opts));
>          return NULL;
>      }
>      for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
> @@ -2799,15 +2800,15 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
>              break;
>      }
>      if (i == ARRAY_SIZE(backend_table)) {
> -        fprintf(stderr, "chardev: backend \"%s\" not found\n",
> -                qemu_opt_get(opts, "backend"));
> +        error_setg(errp, "chardev: backend \"%s\" not found\n",
> +                   qemu_opt_get(opts, "backend"));
>          return NULL;
>      }
>  
>      chr = backend_table[i].open(opts);
>      if (!chr) {
> -        fprintf(stderr, "chardev: opening backend \"%s\" failed\n",
> -                qemu_opt_get(opts, "backend"));
> +        error_setg(errp, "chardev: opening backend \"%s\" failed\n",
> +                   qemu_opt_get(opts, "backend"));
>          return NULL;
>      }
>  
> @@ -2837,6 +2838,7 @@ CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*in
>      const char *p;
>      CharDriverState *chr;
>      QemuOpts *opts;
> +    Error *err = NULL;
>  
>      if (strstart(filename, "chardev:", &p)) {
>          return qemu_chr_find(p);
> @@ -2846,7 +2848,11 @@ CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*in
>      if (!opts)
>          return NULL;
>  
> -    chr = qemu_chr_new_from_opts(opts, init);
> +    chr = qemu_chr_new_from_opts(opts, init, &err);
> +    if (error_is_set(&err)) {
> +        fprintf(stderr, "%s\n", error_get_pretty(err));
> +        error_free(err);
> +    }
>      if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
>          monitor_init(chr, MONITOR_USE_READLINE);
>      }
> diff --git a/vl.c b/vl.c
> index f056c95..f5f2026 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2052,11 +2052,14 @@ static int device_init_func(QemuOpts *opts, void *opaque)
>  
>  static int chardev_init_func(QemuOpts *opts, void *opaque)
>  {
> -    CharDriverState *chr;
> +    Error *local_err = NULL;
>  
> -    chr = qemu_chr_new_from_opts(opts, NULL);
> -    if (!chr)
> +    qemu_chr_new_from_opts(opts, NULL, &local_err);
> +    if (error_is_set(&local_err)) {
> +        fprintf(stderr, "%s\n", error_get_pretty(local_err));
> +        error_free(local_err);
>          return -1;
> +    }
>      return 0;
>  }
>  
>