[Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Anthony PERARD]

Patch "xen: add event channel interface for XenDevice-s" makes use of
the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
4.7. Also the function xen_device_bind_event_channel assign the return
value of xenevtchn_bind_interdomain to channel->local_port but check the
result for error with xendev->local_port.

Fix by:
- removing local_port from struct XenDevice as it isn't use anywere.
- adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
  4.6 and earlier.

As extra, replace the type of XenEventChannel->local_port by
evtchn_port_t.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
 hw/xen/xen-bus.c            | 12 +++++++-----
 include/hw/xen/xen-bus.h    |  1 -
 include/hw/xen/xen_common.h |  1 +
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c
index f90bcf2342..3aeccec69c 100644
--- a/hw/xen/xen-bus.c
+++ b/hw/xen/xen-bus.c
@@ -917,7 +917,7 @@ void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain,
 }
 
 struct XenEventChannel {
-    unsigned int local_port;
+    evtchn_port_t local_port;
     XenEventHandler handler;
     void *opaque;
     Notifier notifier;
@@ -939,17 +939,19 @@ XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev,
                                                void *opaque, Error **errp)
 {
     XenEventChannel *channel = g_new0(XenEventChannel, 1);
+    xenevtchn_port_or_error_t local_port;
 
-    channel->local_port = xenevtchn_bind_interdomain(xendev->xeh,
-                                                     xendev->frontend_id,
-                                                     port);
-    if (xendev->local_port < 0) {
+    local_port = xenevtchn_bind_interdomain(xendev->xeh,
+                                            xendev->frontend_id,
+                                            port);
+    if (local_port < 0) {
         error_setg_errno(errp, errno, "xenevtchn_bind_interdomain failed");
 
         g_free(channel);
         return NULL;
     }
 
+    channel->local_port = local_port;
     channel->handler = handler;
     channel->opaque = opaque;
     channel->notifier.notify = event_notify;
diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h
index e55a5de5f1..3183f10e3c 100644
--- a/include/hw/xen/xen-bus.h
+++ b/include/hw/xen/xen-bus.h
@@ -29,7 +29,6 @@ typedef struct XenDevice {
     xengnttab_handle *xgth;
     bool feature_grant_copy;
     xenevtchn_handle *xeh;
-    xenevtchn_port_or_error_t local_port;
     NotifierList event_notifiers;
 } XenDevice;
 
diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
index 2b91d199a1..9a8155e172 100644
--- a/include/hw/xen/xen_common.h
+++ b/include/hw/xen/xen_common.h
@@ -32,6 +32,7 @@ extern xc_interface *xen_xc;
 typedef xc_interface xenforeignmemory_handle;
 typedef xc_evtchn xenevtchn_handle;
 typedef xc_gnttab xengnttab_handle;
+typedef evtchn_port_or_error_t xenevtchn_port_or_error_t;
 
 #define xenevtchn_open(l, f) xc_evtchn_open(l, f);
 #define xenevtchn_close(h) xc_evtchn_close(h)
-- 
Anthony PERARD

[PATCH] xen: Fix event channel interface for XenDevice-s

[Anthony PERARD]

Patch "xen: add event channel interface for XenDevice-s" makes use of
the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
4.7. Also the function xen_device_bind_event_channel assign the return
value of xenevtchn_bind_interdomain to channel->local_port but check the
result for error with xendev->local_port.

Fix by:
- removing local_port from struct XenDevice as it isn't use anywere.
- adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
  4.6 and earlier.

As extra, replace the type of XenEventChannel->local_port by
evtchn_port_t.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
---
 hw/xen/xen-bus.c            | 12 +++++++-----
 include/hw/xen/xen-bus.h    |  1 -
 include/hw/xen/xen_common.h |  1 +
 3 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c
index f90bcf2342..3aeccec69c 100644
--- a/hw/xen/xen-bus.c
+++ b/hw/xen/xen-bus.c
@@ -917,7 +917,7 @@ void xen_device_copy_grant_refs(XenDevice *xendev, bool to_domain,
 }
 
 struct XenEventChannel {
-    unsigned int local_port;
+    evtchn_port_t local_port;
     XenEventHandler handler;
     void *opaque;
     Notifier notifier;
@@ -939,17 +939,19 @@ XenEventChannel *xen_device_bind_event_channel(XenDevice *xendev,
                                                void *opaque, Error **errp)
 {
     XenEventChannel *channel = g_new0(XenEventChannel, 1);
+    xenevtchn_port_or_error_t local_port;
 
-    channel->local_port = xenevtchn_bind_interdomain(xendev->xeh,
-                                                     xendev->frontend_id,
-                                                     port);
-    if (xendev->local_port < 0) {
+    local_port = xenevtchn_bind_interdomain(xendev->xeh,
+                                            xendev->frontend_id,
+                                            port);
+    if (local_port < 0) {
         error_setg_errno(errp, errno, "xenevtchn_bind_interdomain failed");
 
         g_free(channel);
         return NULL;
     }
 
+    channel->local_port = local_port;
     channel->handler = handler;
     channel->opaque = opaque;
     channel->notifier.notify = event_notify;
diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h
index e55a5de5f1..3183f10e3c 100644
--- a/include/hw/xen/xen-bus.h
+++ b/include/hw/xen/xen-bus.h
@@ -29,7 +29,6 @@ typedef struct XenDevice {
     xengnttab_handle *xgth;
     bool feature_grant_copy;
     xenevtchn_handle *xeh;
-    xenevtchn_port_or_error_t local_port;
     NotifierList event_notifiers;
 } XenDevice;
 
diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
index 2b91d199a1..9a8155e172 100644
--- a/include/hw/xen/xen_common.h
+++ b/include/hw/xen/xen_common.h
@@ -32,6 +32,7 @@ extern xc_interface *xen_xc;
 typedef xc_interface xenforeignmemory_handle;
 typedef xc_evtchn xenevtchn_handle;
 typedef xc_gnttab xengnttab_handle;
+typedef evtchn_port_or_error_t xenevtchn_port_or_error_t;
 
 #define xenevtchn_open(l, f) xc_evtchn_open(l, f);
 #define xenevtchn_close(h) xc_evtchn_close(h)
-- 
Anthony PERARD


_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel

Re: [Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Anthony PERARD]

On Fri, Jan 11, 2019 at 06:09:41PM +0000, Anthony PERARD wrote:
> Patch "xen: add event channel interface for XenDevice-s" makes use of
> the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> 4.7. Also the function xen_device_bind_event_channel assign the return
> value of xenevtchn_bind_interdomain to channel->local_port but check the
> result for error with xendev->local_port.
> 
> Fix by:
> - removing local_port from struct XenDevice as it isn't use anywere.
> - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
>   4.6 and earlier.
> 
> As extra, replace the type of XenEventChannel->local_port by
> evtchn_port_t.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>

Notes:
This patch fix "xen: add event channel interface for XenDevice-s" that
isn't commited yet, of the patch series "Xen PV backend 'qdevification'".

-- 
Anthony PERARD

Re: [PATCH] xen: Fix event channel interface for XenDevice-s

[Anthony PERARD]

On Fri, Jan 11, 2019 at 06:09:41PM +0000, Anthony PERARD wrote:
> Patch "xen: add event channel interface for XenDevice-s" makes use of
> the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> 4.7. Also the function xen_device_bind_event_channel assign the return
> value of xenevtchn_bind_interdomain to channel->local_port but check the
> result for error with xendev->local_port.
> 
> Fix by:
> - removing local_port from struct XenDevice as it isn't use anywere.
> - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
>   4.6 and earlier.
> 
> As extra, replace the type of XenEventChannel->local_port by
> evtchn_port_t.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>

Notes:
This patch fix "xen: add event channel interface for XenDevice-s" that
isn't commited yet, of the patch series "Xen PV backend 'qdevification'".

-- 
Anthony PERARD

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel

Re: [Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Peter Maydell]

On Fri, 11 Jan 2019 at 18:13, Anthony PERARD <anthony.perard@citrix.com> wrote:
>
> On Fri, Jan 11, 2019 at 06:09:41PM +0000, Anthony PERARD wrote:
> > Patch "xen: add event channel interface for XenDevice-s" makes use of
> > the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> > 4.7. Also the function xen_device_bind_event_channel assign the return
> > value of xenevtchn_bind_interdomain to channel->local_port but check the
> > result for error with xendev->local_port.
> >
> > Fix by:
> > - removing local_port from struct XenDevice as it isn't use anywere.
> > - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
> >   4.6 and earlier.
> >
> > As extra, replace the type of XenEventChannel->local_port by
> > evtchn_port_t.
> >
> > Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
>
> Notes:
> This patch fix "xen: add event channel interface for XenDevice-s" that
> isn't commited yet, of the patch series "Xen PV backend 'qdevification'".

Thanks for the fix. I assume you're going to squash it into the
appropriate patch in that pullrequest ?

thanks
-- PMM

Re: [Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Peter Maydell]

On Fri, 11 Jan 2019 at 18:13, Anthony PERARD <anthony.perard@citrix.com> wrote:
>
> On Fri, Jan 11, 2019 at 06:09:41PM +0000, Anthony PERARD wrote:
> > Patch "xen: add event channel interface for XenDevice-s" makes use of
> > the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> > 4.7. Also the function xen_device_bind_event_channel assign the return
> > value of xenevtchn_bind_interdomain to channel->local_port but check the
> > result for error with xendev->local_port.
> >
> > Fix by:
> > - removing local_port from struct XenDevice as it isn't use anywere.
> > - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
> >   4.6 and earlier.
> >
> > As extra, replace the type of XenEventChannel->local_port by
> > evtchn_port_t.
> >
> > Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
>
> Notes:
> This patch fix "xen: add event channel interface for XenDevice-s" that
> isn't commited yet, of the patch series "Xen PV backend 'qdevification'".

Thanks for the fix. I assume you're going to squash it into the
appropriate patch in that pullrequest ?

thanks
-- PMM

_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel

Re: [Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Paul Durrant]

> -----Original Message-----
> From: Anthony PERARD [mailto:anthony.perard@citrix.com]
> Sent: 11 January 2019 18:10
> To: qemu-devel@nongnu.org
> Cc: Anthony Perard <anthony.perard@citrix.com>; Stefano Stabellini
> <sstabellini@kernel.org>; Paul Durrant <Paul.Durrant@citrix.com>; open
> list:X86 <xen-devel@lists.xenproject.org>
> Subject: [PATCH] xen: Fix event channel interface for XenDevice-s
> 
> Patch "xen: add event channel interface for XenDevice-s" makes use of
> the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> 4.7. Also the function xen_device_bind_event_channel assign the return
> value of xenevtchn_bind_interdomain to channel->local_port but check the
> result for error with xendev->local_port.
> 
> Fix by:
> - removing local_port from struct XenDevice as it isn't use anywere.
> - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
>   4.6 and earlier.
> 
> As extra, replace the type of XenEventChannel->local_port by
> evtchn_port_t.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>

Reviewed-by: Paul Durrant <paul.durrant@citrix.com>

> ---
>  hw/xen/xen-bus.c            | 12 +++++++-----
>  include/hw/xen/xen-bus.h    |  1 -
>  include/hw/xen/xen_common.h |  1 +
>  3 files changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c
> index f90bcf2342..3aeccec69c 100644
> --- a/hw/xen/xen-bus.c
> +++ b/hw/xen/xen-bus.c
> @@ -917,7 +917,7 @@ void xen_device_copy_grant_refs(XenDevice *xendev,
> bool to_domain,
>  }
> 
>  struct XenEventChannel {
> -    unsigned int local_port;
> +    evtchn_port_t local_port;
>      XenEventHandler handler;
>      void *opaque;
>      Notifier notifier;
> @@ -939,17 +939,19 @@ XenEventChannel
> *xen_device_bind_event_channel(XenDevice *xendev,
>                                                 void *opaque, Error
> **errp)
>  {
>      XenEventChannel *channel = g_new0(XenEventChannel, 1);
> +    xenevtchn_port_or_error_t local_port;
> 
> -    channel->local_port = xenevtchn_bind_interdomain(xendev->xeh,
> -                                                     xendev->frontend_id,
> -                                                     port);
> -    if (xendev->local_port < 0) {
> +    local_port = xenevtchn_bind_interdomain(xendev->xeh,
> +                                            xendev->frontend_id,
> +                                            port);
> +    if (local_port < 0) {
>          error_setg_errno(errp, errno, "xenevtchn_bind_interdomain
> failed");
> 
>          g_free(channel);
>          return NULL;
>      }
> 
> +    channel->local_port = local_port;
>      channel->handler = handler;
>      channel->opaque = opaque;
>      channel->notifier.notify = event_notify;
> diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h
> index e55a5de5f1..3183f10e3c 100644
> --- a/include/hw/xen/xen-bus.h
> +++ b/include/hw/xen/xen-bus.h
> @@ -29,7 +29,6 @@ typedef struct XenDevice {
>      xengnttab_handle *xgth;
>      bool feature_grant_copy;
>      xenevtchn_handle *xeh;
> -    xenevtchn_port_or_error_t local_port;
>      NotifierList event_notifiers;
>  } XenDevice;
> 
> diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
> index 2b91d199a1..9a8155e172 100644
> --- a/include/hw/xen/xen_common.h
> +++ b/include/hw/xen/xen_common.h
> @@ -32,6 +32,7 @@ extern xc_interface *xen_xc;
>  typedef xc_interface xenforeignmemory_handle;
>  typedef xc_evtchn xenevtchn_handle;
>  typedef xc_gnttab xengnttab_handle;
> +typedef evtchn_port_or_error_t xenevtchn_port_or_error_t;
> 
>  #define xenevtchn_open(l, f) xc_evtchn_open(l, f);
>  #define xenevtchn_close(h) xc_evtchn_close(h)
> --
> Anthony PERARD

Re: [PATCH] xen: Fix event channel interface for XenDevice-s

[Paul Durrant]

> -----Original Message-----
> From: Anthony PERARD [mailto:anthony.perard@citrix.com]
> Sent: 11 January 2019 18:10
> To: qemu-devel@nongnu.org
> Cc: Anthony Perard <anthony.perard@citrix.com>; Stefano Stabellini
> <sstabellini@kernel.org>; Paul Durrant <Paul.Durrant@citrix.com>; open
> list:X86 <xen-devel@lists.xenproject.org>
> Subject: [PATCH] xen: Fix event channel interface for XenDevice-s
> 
> Patch "xen: add event channel interface for XenDevice-s" makes use of
> the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> 4.7. Also the function xen_device_bind_event_channel assign the return
> value of xenevtchn_bind_interdomain to channel->local_port but check the
> result for error with xendev->local_port.
> 
> Fix by:
> - removing local_port from struct XenDevice as it isn't use anywere.
> - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
>   4.6 and earlier.
> 
> As extra, replace the type of XenEventChannel->local_port by
> evtchn_port_t.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>

Reviewed-by: Paul Durrant <paul.durrant@citrix.com>

> ---
>  hw/xen/xen-bus.c            | 12 +++++++-----
>  include/hw/xen/xen-bus.h    |  1 -
>  include/hw/xen/xen_common.h |  1 +
>  3 files changed, 8 insertions(+), 6 deletions(-)
> 
> diff --git a/hw/xen/xen-bus.c b/hw/xen/xen-bus.c
> index f90bcf2342..3aeccec69c 100644
> --- a/hw/xen/xen-bus.c
> +++ b/hw/xen/xen-bus.c
> @@ -917,7 +917,7 @@ void xen_device_copy_grant_refs(XenDevice *xendev,
> bool to_domain,
>  }
> 
>  struct XenEventChannel {
> -    unsigned int local_port;
> +    evtchn_port_t local_port;
>      XenEventHandler handler;
>      void *opaque;
>      Notifier notifier;
> @@ -939,17 +939,19 @@ XenEventChannel
> *xen_device_bind_event_channel(XenDevice *xendev,
>                                                 void *opaque, Error
> **errp)
>  {
>      XenEventChannel *channel = g_new0(XenEventChannel, 1);
> +    xenevtchn_port_or_error_t local_port;
> 
> -    channel->local_port = xenevtchn_bind_interdomain(xendev->xeh,
> -                                                     xendev->frontend_id,
> -                                                     port);
> -    if (xendev->local_port < 0) {
> +    local_port = xenevtchn_bind_interdomain(xendev->xeh,
> +                                            xendev->frontend_id,
> +                                            port);
> +    if (local_port < 0) {
>          error_setg_errno(errp, errno, "xenevtchn_bind_interdomain
> failed");
> 
>          g_free(channel);
>          return NULL;
>      }
> 
> +    channel->local_port = local_port;
>      channel->handler = handler;
>      channel->opaque = opaque;
>      channel->notifier.notify = event_notify;
> diff --git a/include/hw/xen/xen-bus.h b/include/hw/xen/xen-bus.h
> index e55a5de5f1..3183f10e3c 100644
> --- a/include/hw/xen/xen-bus.h
> +++ b/include/hw/xen/xen-bus.h
> @@ -29,7 +29,6 @@ typedef struct XenDevice {
>      xengnttab_handle *xgth;
>      bool feature_grant_copy;
>      xenevtchn_handle *xeh;
> -    xenevtchn_port_or_error_t local_port;
>      NotifierList event_notifiers;
>  } XenDevice;
> 
> diff --git a/include/hw/xen/xen_common.h b/include/hw/xen/xen_common.h
> index 2b91d199a1..9a8155e172 100644
> --- a/include/hw/xen/xen_common.h
> +++ b/include/hw/xen/xen_common.h
> @@ -32,6 +32,7 @@ extern xc_interface *xen_xc;
>  typedef xc_interface xenforeignmemory_handle;
>  typedef xc_evtchn xenevtchn_handle;
>  typedef xc_gnttab xengnttab_handle;
> +typedef evtchn_port_or_error_t xenevtchn_port_or_error_t;
> 
>  #define xenevtchn_open(l, f) xc_evtchn_open(l, f);
>  #define xenevtchn_close(h) xc_evtchn_close(h)
> --
> Anthony PERARD


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Re: [Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Anthony PERARD]

On Fri, Jan 11, 2019 at 06:16:45PM +0000, Peter Maydell wrote:
> On Fri, 11 Jan 2019 at 18:13, Anthony PERARD <anthony.perard@citrix.com> wrote:
> >
> > On Fri, Jan 11, 2019 at 06:09:41PM +0000, Anthony PERARD wrote:
> > > Patch "xen: add event channel interface for XenDevice-s" makes use of
> > > the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> > > 4.7. Also the function xen_device_bind_event_channel assign the return
> > > value of xenevtchn_bind_interdomain to channel->local_port but check the
> > > result for error with xendev->local_port.
> > >
> > > Fix by:
> > > - removing local_port from struct XenDevice as it isn't use anywere.
> > > - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
> > >   4.6 and earlier.
> > >
> > > As extra, replace the type of XenEventChannel->local_port by
> > > evtchn_port_t.
> > >
> > > Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
> >
> > Notes:
> > This patch fix "xen: add event channel interface for XenDevice-s" that
> > isn't commited yet, of the patch series "Xen PV backend 'qdevification'".
> 
> Thanks for the fix. I assume you're going to squash it into the
> appropriate patch in that pullrequest ?

Yes, it's a good idea to squash it. I'll resubmit the pullreq shortly.

-- 
Anthony PERARD

Re: [Qemu-devel] [PATCH] xen: Fix event channel interface for XenDevice-s

[Anthony PERARD]

On Fri, Jan 11, 2019 at 06:16:45PM +0000, Peter Maydell wrote:
> On Fri, 11 Jan 2019 at 18:13, Anthony PERARD <anthony.perard@citrix.com> wrote:
> >
> > On Fri, Jan 11, 2019 at 06:09:41PM +0000, Anthony PERARD wrote:
> > > Patch "xen: add event channel interface for XenDevice-s" makes use of
> > > the type xenevtchn_port_or_error_t, but this isn't avaiable before Xen
> > > 4.7. Also the function xen_device_bind_event_channel assign the return
> > > value of xenevtchn_bind_interdomain to channel->local_port but check the
> > > result for error with xendev->local_port.
> > >
> > > Fix by:
> > > - removing local_port from struct XenDevice as it isn't use anywere.
> > > - adding a compatibility typedef for xenevtchn_port_or_error_t for Xen
> > >   4.6 and earlier.
> > >
> > > As extra, replace the type of XenEventChannel->local_port by
> > > evtchn_port_t.
> > >
> > > Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
> >
> > Notes:
> > This patch fix "xen: add event channel interface for XenDevice-s" that
> > isn't commited yet, of the patch series "Xen PV backend 'qdevification'".
> 
> Thanks for the fix. I assume you're going to squash it into the
> appropriate patch in that pullrequest ?

Yes, it's a good idea to squash it. I'll resubmit the pullreq shortly.

-- 
Anthony PERARD

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