On Thu, 2011-06-02 at 18:55 +0100, Ian Jackson wrote:
> Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
> ---
> docs/misc/xl-disk-configuration.txt | 17 +
> tools/libxl/libxlu_disk_l.c | 690
> +++++++++++++++++++----------------
> tools/libxl/libxlu_disk_l.h | 2 +-
> tools/libxl/libxlu_disk_l.l | 9 +
> 4 files changed, 395 insertions(+), 323 deletions(-)
>
> diff --git a/docs/misc/xl-disk-configuration.txt
> b/docs/misc/xl-disk-configuration.txt
> index de0a75e..91e0cc7 100644
> --- a/docs/misc/xl-disk-configuration.txt
> +++ b/docs/misc/xl-disk-configuration.txt
> @@ -139,6 +139,23 @@ cdrom
> Convenience alias for "devtype=cdrom".
>
>
> +backendtype=<backend-type>
> +--------------------------
> +
> +Description: Specifies the backend implementation to use
> +Supported values: phy, tap, qdisk
> +Mandatory: No
> +Default value: Automatically determine which backend to use.
> +
> +This does not affect the guest's view of the device. It controls
> +which software implementation of the Xen backend driver us used.
> +
> +Not all backend drivers support all combinations of other options.
> +For example, "phy" does not support formats other than "raw".
> +Normally this option should not be specified, in which case libxl will
> +automatically determine the most suitable backend.
The deprecated prefixes ("tapdisk:", "phy:" etc) are explicitly not
aliases for any of these, right?
In any case...
Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
Not really related to this patch but it occurs to me that there probably
ought to be backend types for the non-Linux dom0, e.g. *BSD backendd.
Ian.
> +
> +
> script=<script>
> ---------------
...
> diff --git a/tools/libxl/libxlu_disk_l.l b/tools/libxl/libxlu_disk_l.l
> index 48a1314..e9d43c9 100644
> --- a/tools/libxl/libxlu_disk_l.l
> +++ b/tools/libxl/libxlu_disk_l.l
> @@ -100,6 +100,14 @@ static void setformat(DiskParseContext *dpc, const char
> *str) {
> else xlu__disk_err(dpc,str,"unknown value for format");
> }
>
> +/* Sets ->backend from the string. IDL should provide something for this. */
> +static void setbackendtype(DiskParseContext *dpc, const char *str) {
> + if ( !strcmp(str,"phy")) DSET(dpc,backend,BACKEND,str,PHY);
> + else if (!strcmp(str,"tap")) DSET(dpc,backend,BACKEND,str,TAP);
> + else if (!strcmp(str,"qdisk")) DSET(dpc,backend,BACKEND,str,QDISK);
> + else xlu__disk_err(dpc,str,"unknown value for backendtype");
> +}
> +
> #define DEPRECATE(usewhatinstead) /* not currently reported */
>
> %}
> @@ -131,6 +139,7 @@ devtype=disk,? { DPC->disk->is_cdrom = 0; }
> devtype=[^,]*,? { xlu__disk_err(DPC,yytext,"unknown value for type");
> }
>
> access=[^,]*,? { STRIP(','); setaccess(DPC, FROMEQUALS); }
> +backendtype=[^,]*? { STRIP(','); setbackendtype(DPC,yytext); }
>
> vdev=[^,]*,? { STRIP(','); SAVESTRING("vdev", vdev, FROMEQUALS); }
> script=[^,]*,? { STRIP(','); SAVESTRING("script", script, FROMEQUALS); }
> --
> 1.5.6.5
>
>
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