Re: [Xen-devel] [PATCH 3/3]xl: Add "xl rename" command

[Yang Hongyang <yanghy@xxxxxxxxxxxxxx>]

Hi Stefano,
On 05/07/2010 11:45 PM, Stefano Stabellini wrote:
> On Fri, 7 May 2010, Yang Hongyang wrote:
>> Hi Keir, Stefano,
>>
>> It's based on my previous 2 patchs: Add "xl domid" command / Add "xl 
>> domname" command
>>
>> ==========================================================
>>
>> Add "xl rename" command, a clone of "xm rename".
>>
>> Signed-off-by: Yang Hongyang <yanghy@xxxxxxxxxxxxxx>
>>
>> diff -r 357eab43f7ee -r 636a21458395 tools/libxl/xl_cmdimpl.c
>> --- a/tools/libxl/xl_cmdimpl.c       Fri May 07 20:06:28 2010 +0800
>> +++ b/tools/libxl/xl_cmdimpl.c       Fri May 07 22:01:41 2010 +0800
>> @@ -1227,6 +1227,9 @@
>>      } else if (!strcmp(command, "domname")) {
>>          printf("Usage: xl domname <DomainId>\n\n");
>>          printf("Convert a domain id to domain name.\n");
>> +    } else if (!strcmp(command, "rename")) {
>> +        printf("Usage: xl rename <Domain> <NewDomainName>\n\n");
>> +        printf("Rename a domain.\n");
>>      }
>>  }
>>  
>> @@ -3024,3 +3027,45 @@
>>  
>>      exit(0);
>>  }
>> +
>> +int main_rename(int argc, char **argv)
>> +{
>> +    int opt;
>> +    char *dom;
>> +    char *new_name;
>> +    xs_transaction_t t;
>> +
>> +    while ((opt = getopt(argc, argv, "h")) != -1) {
>> +        switch (opt) {
>> +        case 'h':
>> +            help("rename");
>> +            exit(0);
>> +        default:
>> +            fprintf(stderr, "option `%c' not supported.\n", opt);
>> +            break;
>> +        }
>> +    }
>> +
>> +    dom = argv[optind++];
>> +    if (!dom || !argv[optind]) {
>> +        fprintf(stderr, "'xl rename' requires 2 arguments.\n\n");
>> +        help("rename");
>> +        exit(1);
>> +    }
>> +
>> +    find_domain(dom);
>> +    new_name = argv[optind];
>> +
>> +retry_transaction:
>> +    t = xs_transaction_start(ctx.xsh);
>> +    if (libxl_domain_rename(&ctx, domid, common_domname, new_name, t)) {
>> +        fprintf(stderr, "Can't rename domain '%s'.\n", dom);
>> +        exit(1);
>> +    }
>> +
>> +    if (!xs_transaction_end(ctx.xsh, t, 0))
>> +        if (errno == EAGAIN)
>> +            goto retry_transaction;
>> +
>> +    exit(0);
>> +}
> 
> There is no need to explicitly handle the transaction here, just pass 0
> to libxl_domain_rename.
> In the near future libxl_domain_rename won't take a transaction anymore
> (libxl clients shouldn't know about xenstore).
> 
> 

I will send a patch to fix it.

> 
> 


-- 
Regards
Yang Hongyang

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