[v3,01/16] vl: Clean up parsing of -boot option argument

Commit 3d3b8303 threw in some QemuOpts parsing without replacing the
existing ad hoc parser, resulting in a confusing mess.  Clean it up.

Two user-visible changes:

1. Invalid options are reported more nicely.  Before:

        qemu: unknown boot parameter 'x' in 'x=y'

   After:

        qemu-system-x86_64: -boot x=y: Invalid parameter 'x'

2. If -boot is given multiple times, options accumulate, just like for
   -machine.  Before, only options order, once and menu accumulated.
   For the other ones, all but the first -boot in non-legacy syntax
   got simply ignored.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 vl.c | 84 ++++++++++++++++++--------------------------------------------------
 1 file changed, 22 insertions(+), 62 deletions(-)

Markus Armbruster <armbru@redhat.com> writes:

> Commit 3d3b8303 threw in some QemuOpts parsing without replacing the
> existing ad hoc parser, resulting in a confusing mess.  Clean it up.
>
> Two user-visible changes:
>
> 1. Invalid options are reported more nicely.  Before:
>
>         qemu: unknown boot parameter 'x' in 'x=y'
>
>    After:
>
>         qemu-system-x86_64: -boot x=y: Invalid parameter 'x'
>
> 2. If -boot is given multiple times, options accumulate, just like for
>    -machine.  Before, only options order, once and menu accumulated.
>    For the other ones, all but the first -boot in non-legacy syntax
>    got simply ignored.
>
> Signed-off-by: Markus Armbruster <armbru@redhat.com>

Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>

Regards,

Anthony Liguori

> ---
>  vl.c | 84 ++++++++++++++++++--------------------------------------------------
>  1 file changed, 22 insertions(+), 62 deletions(-)
>
> diff --git a/vl.c b/vl.c
> index 180fdde..a0ac6e9 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -436,9 +436,10 @@ static QemuOptsList qemu_machine_opts = {
>  
>  static QemuOptsList qemu_boot_opts = {
>      .name = "boot-opts",
> +    .implied_opt_name = "order",
> +    .merge_lists = true,
>      .head = QTAILQ_HEAD_INITIALIZER(qemu_boot_opts.head),
>      .desc = {
> -        /* the three names below are not used now */
>          {
>              .name = "order",
>              .type = QEMU_OPT_STRING,
> @@ -447,8 +448,7 @@ static QemuOptsList qemu_boot_opts = {
>              .type = QEMU_OPT_STRING,
>          }, {
>              .name = "menu",
> -            .type = QEMU_OPT_STRING,
> -        /* following are really used */
> +            .type = QEMU_OPT_BOOL,
>          }, {
>              .name = "splash",
>              .type = QEMU_OPT_STRING,
> @@ -1159,7 +1159,7 @@ int qemu_boot_set(const char *boot_devices)
>      return boot_set_handler(boot_set_opaque, boot_devices);
>  }
>  
> -static void validate_bootdevices(char *devices)
> +static void validate_bootdevices(const char *devices)
>  {
>      /* We just do some generic consistency checks */
>      const char *p;
> @@ -3134,70 +3134,30 @@ int main(int argc, char **argv, char **envp)
>                  break;
>              case QEMU_OPTION_boot:
>                  {
> -                    static const char * const params[] = {
> -                        "order", "once", "menu",
> -                        "splash", "splash-time",
> -                        "reboot-timeout", "strict", NULL
> -                    };
> -                    char buf[sizeof(boot_devices)];
>                      char *standard_boot_devices;
> -                    int legacy = 0;
> -
> -                    if (!strchr(optarg, '=')) {
> -                        legacy = 1;
> -                        pstrcpy(buf, sizeof(buf), optarg);
> -                    } else if (check_params(buf, sizeof(buf), params, optarg) < 0) {
> -                        fprintf(stderr,
> -                                "qemu: unknown boot parameter '%s' in '%s'\n",
> -                                buf, optarg);
> +                    const char *order, *once;
> +
> +                    opts = qemu_opts_parse(qemu_find_opts("boot-opts"),
> +                                           optarg, 1);
> +                    if (!opts) {
>                          exit(1);
>                      }
>  
> -                    if (legacy ||
> -                        get_param_value(buf, sizeof(buf), "order", optarg)) {
> -                        validate_bootdevices(buf);
> -                        pstrcpy(boot_devices, sizeof(boot_devices), buf);
> +                    order = qemu_opt_get(opts, "order");
> +                    if (order) {
> +                        validate_bootdevices(order);
> +                        pstrcpy(boot_devices, sizeof(boot_devices), order);
>                      }
> -                    if (!legacy) {
> -                        if (get_param_value(buf, sizeof(buf),
> -                                            "once", optarg)) {
> -                            validate_bootdevices(buf);
> -                            standard_boot_devices = g_strdup(boot_devices);
> -                            pstrcpy(boot_devices, sizeof(boot_devices), buf);
> -                            qemu_register_reset(restore_boot_devices,
> -                                                standard_boot_devices);
> -                        }
> -                        if (get_param_value(buf, sizeof(buf),
> -                                            "menu", optarg)) {
> -                            if (!strcmp(buf, "on")) {
> -                                boot_menu = 1;
> -                            } else if (!strcmp(buf, "off")) {
> -                                boot_menu = 0;
> -                            } else {
> -                                fprintf(stderr,
> -                                        "qemu: invalid option value '%s'\n",
> -                                        buf);
> -                                exit(1);
> -                            }
> -                        }
> -                        if (get_param_value(buf, sizeof(buf),
> -                                            "strict", optarg)) {
> -                            if (!strcmp(buf, "on")) {
> -                                boot_strict = true;
> -                            } else if (!strcmp(buf, "off")) {
> -                                boot_strict = false;
> -                            } else {
> -                                fprintf(stderr,
> -                                        "qemu: invalid option value '%s'\n",
> -                                        buf);
> -                                exit(1);
> -                            }
> -                        }
> -                        if (!qemu_opts_parse(qemu_find_opts("boot-opts"),
> -                                             optarg, 0)) {
> -                            exit(1);
> -                        }
> +
> +                    once = qemu_opt_get(opts, "once");
> +                    if (once) {
> +                        validate_bootdevices(once);
> +                        standard_boot_devices = g_strdup(boot_devices);
> +                        pstrcpy(boot_devices, sizeof(boot_devices), once);
> +                        qemu_register_reset(restore_boot_devices,
> +                                            standard_boot_devices);
>                      }
> +                    boot_menu = qemu_opt_get_bool(opts, "menu", boot_menu);
>                  }
>                  break;
>              case QEMU_OPTION_fda:
> -- 
> 1.7.11.7