Re: [Qemu-devel] [PATCHv2 1/2] vl.c: Fix error messages when parsing maxmem parameters

[Igor Mammedov <imammedo@redhat.com>]

On Wed, 28 Jan 2015 09:35:03 +0100
Peter Krempa <pkrempa@redhat.com> wrote:

> Produce more human readable error messages and fix few spelling
> mistakes.
> 
> Also remove a redundant check for the max memory size.
> 
> Signed-off-by: Peter Krempa <pkrempa@redhat.com>
> ---
> 
> Notes:
>     Version 2:
>     - fixed spacing in error message
>     - changed control flow to allow maxmem == ram_size in case slots == 0
> 
>  vl.c | 34 ++++++++++++++++------------------
>  1 file changed, 16 insertions(+), 18 deletions(-)
> 
> diff --git a/vl.c b/vl.c
> index 983259b..5a012f4 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -2694,29 +2694,27 @@ static void set_memory_options(uint64_t *ram_slots, ram_addr_t *maxram_size)
>          uint64_t slots;
> 
>          sz = qemu_opt_get_size(opts, "maxmem", 0);
> +        slots = qemu_opt_get_number(opts, "slots", 0);
>          if (sz < ram_size) {
> -            error_report("invalid -m option value: maxmem "
> -                    "(0x%" PRIx64 ") <= initial memory (0x"
> -                    RAM_ADDR_FMT ")", sz, ram_size);
> +            error_report("invalid value of -m option maxmem: "
> +                         "maximum memory size (0x%" PRIx64 ") must at least "
typo??
"must be at least"

> +                         "the initial memory size (0x" RAM_ADDR_FMT ")",
> +                         sz, ram_size);
>              exit(EXIT_FAILURE);
> -        }
> -
> -        slots = qemu_opt_get_number(opts, "slots", 0);
> -        if ((sz > ram_size) && !slots) {
> -            error_report("invalid -m option value: maxmem "
> -                    "(0x%" PRIx64 ") more than initial memory (0x"
> -                    RAM_ADDR_FMT ") but no hotplug slots where "
> -                    "specified", sz, ram_size);
> +        } else if (sz > ram_size) {
> +            if (!slots) {
> +                error_report("invalid value of -m option: maxmem was "
> +                             "specified, but no hotplug slots were specified");
> +                exit(EXIT_FAILURE);
> +            }
> +        } else if (slots) {
> +            error_report("invalid value of -m option maxmem: "
> +                         "memory slots were specified but maximum memory size "
> +                         "(0x%" PRIx64 ") is equal to the initial memory size "
> +                         "(0x" RAM_ADDR_FMT ")", sz, ram_size);
>              exit(EXIT_FAILURE);
>          }
> 
> -        if ((sz <= ram_size) && slots) {
> -            error_report("invalid -m option value:  %"
> -                    PRIu64 " hotplug slots where specified but "
> -                    "maxmem (0x%" PRIx64 ") <= initial memory (0x"
> -                    RAM_ADDR_FMT ")", slots, sz, ram_size);
> -            exit(EXIT_FAILURE);
> -        }
>          *maxram_size = sz;
>          *ram_slots = slots;
>      } else if ((!maxmem_str && slots_str) ||