Re: [PATCHv2 6/7] interface: Implement driver methods for network config transaction API

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On Thu, May 19, 2011 at 04:51:28PM -0400, Laine Stump wrote:
> From: Michal Privoznik <mprivozn@xxxxxxxxxx>
> 
> This is the functionality at the end of the libvirt part of the call
> chain - for each function, the corresponding netcf API is called.
> ---
>  configure.ac                 |    5 +++
>  src/interface/netcf_driver.c |   76 ++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 81 insertions(+), 0 deletions(-)
> 
> diff --git a/configure.ac b/configure.ac
> index 8db3226..dbec54c 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -1491,6 +1491,11 @@ if test "$with_netcf" = "yes" || test "$with_netcf" = "check"; then
>    if test "$with_netcf" = "yes" ; then
>      AC_DEFINE_UNQUOTED([WITH_NETCF], 1,
>        [whether libnetcf is available to configure physical host network interfaces])
> +    AC_CHECK_LIB([netcf], [ncf_change_begin], [netcf_transactions=1], [netcf_transactions=0])
> +    if test "$netcf_transactions" = "1" ; then
> +        AC_DEFINE_UNQUOTED([HAVE_NETCF_TRANSACTIONS], ["1"],
> +          [we have sufficiently new version of netcf for transaction network API])
> +    fi
>    fi
>  fi
>  AM_CONDITIONAL([WITH_NETCF], [test "$with_netcf" = "yes"])
> diff --git a/src/interface/netcf_driver.c b/src/interface/netcf_driver.c
> index d5b401a..c94cbd5 100644
> --- a/src/interface/netcf_driver.c
> +++ b/src/interface/netcf_driver.c
> @@ -540,6 +540,77 @@ cleanup:
>      return ret;
>  }
>  
> +#ifdef HAVE_NETCF_TRANSACTIONS
> +static int interfaceChangeBegin(virConnectPtr conn ATTRIBUTE_UNUSED,
> +                                unsigned int flags ATTRIBUTE_UNUSED)

Both conn and flags *are* used in this method, and the 2 following
methods.

> +    struct interface_driver *driver = conn->interfacePrivateData;
                                         ^^^^^

> +    int ret;
> +
> +    virCheckFlags(0, -1); /* currently flags must be 0 */

        ^^^^^^^^^^^^

> +
> +    interfaceDriverLock(driver);
> +
> +    ret = ncf_change_begin(driver->netcf, 0);
> +    if (ret < 0) {
> +        const char *errmsg, *details;
> +        int errcode = ncf_error(driver->netcf, &errmsg, &details);
> +        interfaceReportError(netcf_to_vir_err(errcode),
> +                             _("failed to begin transaction (netcf: %s - %s)"),
> +                            errmsg, details ? details : "");

I don't think including the word 'netcf' in the error message here
is relevant. If 'details' is "", then this also adds a trailing ' - ' to
the error string. eg it needs to be

       interfaceReportError(netcf_to_vir_err(errcode),
                            _("failed to begin transaction: %s%s%s)"),
                            errmsg, details ? " - " : "", details ? details : "");


Likewise in the other methods

Regards,
Daniel
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