diff mbox

libxl: do not assume Dom0 backend while getting nic info

Message ID 1473067564-4092-1-git-send-email-marmarek@invisiblethingslab.com (mailing list archive)
State New, archived
Headers show

Commit Message

Marek Marczykowski-Górecki Sept. 5, 2016, 9:26 a.m. UTC
Fill backend_domid field based on backend path.

Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
---
 tools/libxl/libxl_nic.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

Comments

Wei Liu Sept. 5, 2016, 9:39 a.m. UTC | #1
On Mon, Sep 05, 2016 at 11:26:04AM +0200, Marek Marczykowski-Górecki wrote:
> Fill backend_domid field based on backend path.
> 
> Cc: Ian Jackson <ian.jackson@eu.citrix.com>
> Cc: Wei Liu <wei.liu2@citrix.com>
> Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>

Acked-by: Wei Liu <wei.liu2@citrix.com>

I think this is a backport candidate?

> ---
>  tools/libxl/libxl_nic.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/tools/libxl/libxl_nic.c b/tools/libxl/libxl_nic.c
> index c34b7ba..d1caa90 100644
> --- a/tools/libxl/libxl_nic.c
> +++ b/tools/libxl/libxl_nic.c
> @@ -309,6 +309,18 @@ static int libxl__device_nic_from_xenstore(libxl__gc *gc,
>      else
>          nic->devid = 0;
>  
> +    rc = libxl__xs_read_checked(gc, XBT_NULL,
> +                                GCSPRINTF("%s/backend", libxl_path), &tmp);
> +    if (rc) goto out;
> +
> +    if (!tmp) {
> +        LOG(ERROR, "nic %s does not exist (no backend path)", libxl_path);
> +        rc = ERROR_FAIL;
> +        goto out;
> +    }
> +    rc = libxl__backendpath_parse_domid(gc, tmp, &nic->backend_domid);
> +    if (rc) goto out;
> +
>      /* nic->mtu = */
>  
>      rc = libxl__xs_read_checked(gc, XBT_NULL,
> -- 
> 2.5.5
>
Marek Marczykowski-Górecki Sept. 5, 2016, 9:44 a.m. UTC | #2
On Mon, Sep 05, 2016 at 10:39:16AM +0100, Wei Liu wrote:
> On Mon, Sep 05, 2016 at 11:26:04AM +0200, Marek Marczykowski-Górecki wrote:
> > Fill backend_domid field based on backend path.
> > 
> > Cc: Ian Jackson <ian.jackson@eu.citrix.com>
> > Cc: Wei Liu <wei.liu2@citrix.com>
> > Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
> 
> Acked-by: Wei Liu <wei.liu2@citrix.com>
> 
> I think this is a backport candidate?

Yes, certainly. If you want I can send a 4.7 version (function is in
libxl.c there).

In general, should I somehow somehow request a backport in the patch
itself? How?

> > ---
> >  tools/libxl/libxl_nic.c | 12 ++++++++++++
> >  1 file changed, 12 insertions(+)
> > 
> > diff --git a/tools/libxl/libxl_nic.c b/tools/libxl/libxl_nic.c
> > index c34b7ba..d1caa90 100644
> > --- a/tools/libxl/libxl_nic.c
> > +++ b/tools/libxl/libxl_nic.c
> > @@ -309,6 +309,18 @@ static int libxl__device_nic_from_xenstore(libxl__gc *gc,
> >      else
> >          nic->devid = 0;
> >  
> > +    rc = libxl__xs_read_checked(gc, XBT_NULL,
> > +                                GCSPRINTF("%s/backend", libxl_path), &tmp);
> > +    if (rc) goto out;
> > +
> > +    if (!tmp) {
> > +        LOG(ERROR, "nic %s does not exist (no backend path)", libxl_path);
> > +        rc = ERROR_FAIL;
> > +        goto out;
> > +    }
> > +    rc = libxl__backendpath_parse_domid(gc, tmp, &nic->backend_domid);
> > +    if (rc) goto out;
> > +
> >      /* nic->mtu = */
> >  
> >      rc = libxl__xs_read_checked(gc, XBT_NULL,
> > -- 
> > 2.5.5
> >
Wei Liu Sept. 5, 2016, 9:53 a.m. UTC | #3
On Mon, Sep 05, 2016 at 11:44:46AM +0200, Marek Marczykowski-Górecki wrote:
> On Mon, Sep 05, 2016 at 10:39:16AM +0100, Wei Liu wrote:
> > On Mon, Sep 05, 2016 at 11:26:04AM +0200, Marek Marczykowski-Górecki wrote:
> > > Fill backend_domid field based on backend path.
> > > 
> > > Cc: Ian Jackson <ian.jackson@eu.citrix.com>
> > > Cc: Wei Liu <wei.liu2@citrix.com>
> > > Signed-off-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
> > 
> > Acked-by: Wei Liu <wei.liu2@citrix.com>
> > 
> > I think this is a backport candidate?
> 
> Yes, certainly. If you want I can send a 4.7 version (function is in
> libxl.c there).
> 

That would be helpful. Please use PATCH for-4.7 tag and use the
technique I describe below to add postscript that you don't wish to be
in commit message.

> In general, should I somehow somehow request a backport in the patch
> itself? How?

State between the three dashes anything you wish to say --- the content
would be automatically stripped out when committing. I normally do like
this in commit message


libxl: fix foo

Foo is broken because of X, fix it by doing Y.

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
---
Please backport to version Z of Xen.


> 
> > > ---
> > >  tools/libxl/libxl_nic.c | 12 ++++++++++++
> > >  1 file changed, 12 insertions(+)
> > > 
> > > diff --git a/tools/libxl/libxl_nic.c b/tools/libxl/libxl_nic.c
> > > index c34b7ba..d1caa90 100644
> > > --- a/tools/libxl/libxl_nic.c
> > > +++ b/tools/libxl/libxl_nic.c
> > > @@ -309,6 +309,18 @@ static int libxl__device_nic_from_xenstore(libxl__gc *gc,
> > >      else
> > >          nic->devid = 0;
> > >  
> > > +    rc = libxl__xs_read_checked(gc, XBT_NULL,
> > > +                                GCSPRINTF("%s/backend", libxl_path), &tmp);
> > > +    if (rc) goto out;
> > > +
> > > +    if (!tmp) {
> > > +        LOG(ERROR, "nic %s does not exist (no backend path)", libxl_path);
> > > +        rc = ERROR_FAIL;
> > > +        goto out;
> > > +    }
> > > +    rc = libxl__backendpath_parse_domid(gc, tmp, &nic->backend_domid);
> > > +    if (rc) goto out;
> > > +
> > >      /* nic->mtu = */
> > >  
> > >      rc = libxl__xs_read_checked(gc, XBT_NULL,
> > > -- 
> > > 2.5.5
> > > 
> 
> -- 
> Best Regards,
> Marek Marczykowski-Górecki
> Invisible Things Lab
> A: Because it messes up the order in which people normally read text.
> Q: Why is top-posting such a bad thing?
Ian Jackson Sept. 5, 2016, 10:39 a.m. UTC | #4
Wei Liu writes ("Re: [PATCH] libxl: do not assume Dom0 backend while getting nic info"):
> On Mon, Sep 05, 2016 at 11:44:46AM +0200, Marek Marczykowski-Górecki wrote:
> > Yes, certainly. If you want I can send a 4.7 version (function is in
> > libxl.c there).

Thanks for the backport.

Wei, can you mail me here (or tell me on irc) when the unstable fix
goes into staging ?

Thanks,
Ian.
Wei Liu Sept. 5, 2016, 10:53 a.m. UTC | #5
On Mon, Sep 05, 2016 at 11:39:22AM +0100, Ian Jackson wrote:
> Wei Liu writes ("Re: [PATCH] libxl: do not assume Dom0 backend while getting nic info"):
> > On Mon, Sep 05, 2016 at 11:44:46AM +0200, Marek Marczykowski-Górecki wrote:
> > > Yes, certainly. If you want I can send a 4.7 version (function is in
> > > libxl.c there).
> 
> Thanks for the backport.
> 
> Wei, can you mail me here (or tell me on irc) when the unstable fix
> goes into staging ?
> 

This patch is now in staging.

Wei.

> Thanks,
> Ian.
diff mbox

Patch

diff --git a/tools/libxl/libxl_nic.c b/tools/libxl/libxl_nic.c
index c34b7ba..d1caa90 100644
--- a/tools/libxl/libxl_nic.c
+++ b/tools/libxl/libxl_nic.c
@@ -309,6 +309,18 @@  static int libxl__device_nic_from_xenstore(libxl__gc *gc,
     else
         nic->devid = 0;
 
+    rc = libxl__xs_read_checked(gc, XBT_NULL,
+                                GCSPRINTF("%s/backend", libxl_path), &tmp);
+    if (rc) goto out;
+
+    if (!tmp) {
+        LOG(ERROR, "nic %s does not exist (no backend path)", libxl_path);
+        rc = ERROR_FAIL;
+        goto out;
+    }
+    rc = libxl__backendpath_parse_domid(gc, tmp, &nic->backend_domid);
+    if (rc) goto out;
+
     /* nic->mtu = */
 
     rc = libxl__xs_read_checked(gc, XBT_NULL,