* [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
@ 2019-04-12 6:53 ` Dongli Zhang
0 siblings, 0 replies; 9+ messages in thread
From: Dongli Zhang @ 2019-04-12 6:53 UTC (permalink / raw)
To: xen-devel, netdev
Cc: linux-kernel, wei.liu2, paul.durrant, davem, joe.jin, junxiao.bi,
jie.l.li
During coredump analysis, it is not easy to obtain the address of
backend_info in xen-netback.
So far there are two ways to obtain backend_info:
1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
and then derive it from dev_get_drvdata().
2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
or frontend_changed()).
This patch adds a reference from xenvif to backend_info so that it would be
much more easier to obtain backend_info during coredump analysis.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
---
drivers/net/xen-netback/common.h | 18 ++++++++++++++++++
drivers/net/xen-netback/xenbus.c | 17 +----------------
2 files changed, 19 insertions(+), 16 deletions(-)
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 936c0b3..05847eb 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -248,6 +248,22 @@ struct xenvif_hash {
struct xenvif_hash_cache cache;
};
+struct backend_info {
+ struct xenbus_device *dev;
+ struct xenvif *vif;
+
+ /* This is the state that will be reflected in xenstore when any
+ * active hotplug script completes.
+ */
+ enum xenbus_state state;
+
+ enum xenbus_state frontend_state;
+ struct xenbus_watch hotplug_status_watch;
+ u8 have_hotplug_status_watch:1;
+
+ const char *hotplug_script;
+};
+
struct xenvif {
/* Unique identifier for this interface. */
domid_t domid;
@@ -283,6 +299,8 @@ struct xenvif {
struct xenbus_watch credit_watch;
struct xenbus_watch mcast_ctrl_watch;
+ struct backend_info *be;
+
spinlock_t lock;
#ifdef CONFIG_DEBUG_FS
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 330ddb6..41c9e8f 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -22,22 +22,6 @@
#include <linux/vmalloc.h>
#include <linux/rtnetlink.h>
-struct backend_info {
- struct xenbus_device *dev;
- struct xenvif *vif;
-
- /* This is the state that will be reflected in xenstore when any
- * active hotplug script completes.
- */
- enum xenbus_state state;
-
- enum xenbus_state frontend_state;
- struct xenbus_watch hotplug_status_watch;
- u8 have_hotplug_status_watch:1;
-
- const char *hotplug_script;
-};
-
static int connect_data_rings(struct backend_info *be,
struct xenvif_queue *queue);
static void connect(struct backend_info *be);
@@ -472,6 +456,7 @@ static int backend_create_xenvif(struct backend_info *be)
return err;
}
be->vif = vif;
+ vif->be = be;
kobject_uevent(&dev->dev.kobj, KOBJ_ONLINE);
return 0;
--
2.7.4
^ permalink raw reply related [flat|nested] 9+ messages in thread
* [Xen-devel] [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
@ 2019-04-12 6:53 ` Dongli Zhang
0 siblings, 0 replies; 9+ messages in thread
From: Dongli Zhang @ 2019-04-12 6:53 UTC (permalink / raw)
To: xen-devel, netdev
Cc: wei.liu2, joe.jin, linux-kernel, junxiao.bi, paul.durrant,
jie.l.li, davem
During coredump analysis, it is not easy to obtain the address of
backend_info in xen-netback.
So far there are two ways to obtain backend_info:
1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
and then derive it from dev_get_drvdata().
2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
or frontend_changed()).
This patch adds a reference from xenvif to backend_info so that it would be
much more easier to obtain backend_info during coredump analysis.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
---
drivers/net/xen-netback/common.h | 18 ++++++++++++++++++
drivers/net/xen-netback/xenbus.c | 17 +----------------
2 files changed, 19 insertions(+), 16 deletions(-)
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 936c0b3..05847eb 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -248,6 +248,22 @@ struct xenvif_hash {
struct xenvif_hash_cache cache;
};
+struct backend_info {
+ struct xenbus_device *dev;
+ struct xenvif *vif;
+
+ /* This is the state that will be reflected in xenstore when any
+ * active hotplug script completes.
+ */
+ enum xenbus_state state;
+
+ enum xenbus_state frontend_state;
+ struct xenbus_watch hotplug_status_watch;
+ u8 have_hotplug_status_watch:1;
+
+ const char *hotplug_script;
+};
+
struct xenvif {
/* Unique identifier for this interface. */
domid_t domid;
@@ -283,6 +299,8 @@ struct xenvif {
struct xenbus_watch credit_watch;
struct xenbus_watch mcast_ctrl_watch;
+ struct backend_info *be;
+
spinlock_t lock;
#ifdef CONFIG_DEBUG_FS
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 330ddb6..41c9e8f 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -22,22 +22,6 @@
#include <linux/vmalloc.h>
#include <linux/rtnetlink.h>
-struct backend_info {
- struct xenbus_device *dev;
- struct xenvif *vif;
-
- /* This is the state that will be reflected in xenstore when any
- * active hotplug script completes.
- */
- enum xenbus_state state;
-
- enum xenbus_state frontend_state;
- struct xenbus_watch hotplug_status_watch;
- u8 have_hotplug_status_watch:1;
-
- const char *hotplug_script;
-};
-
static int connect_data_rings(struct backend_info *be,
struct xenvif_queue *queue);
static void connect(struct backend_info *be);
@@ -472,6 +456,7 @@ static int backend_create_xenvif(struct backend_info *be)
return err;
}
be->vif = vif;
+ vif->be = be;
kobject_uevent(&dev->dev.kobj, KOBJ_ONLINE);
return 0;
--
2.7.4
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 9+ messages in thread
* Re: [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
2019-04-12 6:53 ` [Xen-devel] " Dongli Zhang
@ 2019-04-12 14:28 ` Wei Liu
-1 siblings, 0 replies; 9+ messages in thread
From: Wei Liu @ 2019-04-12 14:28 UTC (permalink / raw)
To: Dongli Zhang
Cc: xen-devel, netdev, linux-kernel, wei.liu2, paul.durrant, davem,
joe.jin, junxiao.bi, jie.l.li
On Fri, Apr 12, 2019 at 02:53:24PM +0800, Dongli Zhang wrote:
> During coredump analysis, it is not easy to obtain the address of
> backend_info in xen-netback.
>
> So far there are two ways to obtain backend_info:
>
> 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
> and then derive it from dev_get_drvdata().
>
> 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
> or frontend_changed()).
>
> This patch adds a reference from xenvif to backend_info so that it would be
> much more easier to obtain backend_info during coredump analysis.
>
> Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
2019-04-12 6:53 ` [Xen-devel] " Dongli Zhang
(?)
@ 2019-04-12 14:28 ` Wei Liu
-1 siblings, 0 replies; 9+ messages in thread
From: Wei Liu @ 2019-04-12 14:28 UTC (permalink / raw)
To: Dongli Zhang
Cc: wei.liu2, netdev, joe.jin, linux-kernel, junxiao.bi,
paul.durrant, jie.l.li, xen-devel, davem
On Fri, Apr 12, 2019 at 02:53:24PM +0800, Dongli Zhang wrote:
> During coredump analysis, it is not easy to obtain the address of
> backend_info in xen-netback.
>
> So far there are two ways to obtain backend_info:
>
> 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
> and then derive it from dev_get_drvdata().
>
> 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
> or frontend_changed()).
>
> This patch adds a reference from xenvif to backend_info so that it would be
> much more easier to obtain backend_info during coredump analysis.
>
> Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [Xen-devel] [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
@ 2019-04-12 14:28 ` Wei Liu
0 siblings, 0 replies; 9+ messages in thread
From: Wei Liu @ 2019-04-12 14:28 UTC (permalink / raw)
To: Dongli Zhang
Cc: wei.liu2, netdev, joe.jin, linux-kernel, junxiao.bi,
paul.durrant, jie.l.li, xen-devel, davem
On Fri, Apr 12, 2019 at 02:53:24PM +0800, Dongli Zhang wrote:
> During coredump analysis, it is not easy to obtain the address of
> backend_info in xen-netback.
>
> So far there are two ways to obtain backend_info:
>
> 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
> and then derive it from dev_get_drvdata().
>
> 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
> or frontend_changed()).
>
> This patch adds a reference from xenvif to backend_info so that it would be
> much more easier to obtain backend_info during coredump analysis.
>
> Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
2019-04-12 6:53 ` [Xen-devel] " Dongli Zhang
@ 2019-04-12 17:10 ` David Miller
-1 siblings, 0 replies; 9+ messages in thread
From: David Miller @ 2019-04-12 17:10 UTC (permalink / raw)
To: dongli.zhang
Cc: xen-devel, netdev, linux-kernel, wei.liu2, paul.durrant, joe.jin,
junxiao.bi, jie.l.li
From: Dongli Zhang <dongli.zhang@oracle.com>
Date: Fri, 12 Apr 2019 14:53:24 +0800
> During coredump analysis, it is not easy to obtain the address of
> backend_info in xen-netback.
>
> So far there are two ways to obtain backend_info:
>
> 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
> and then derive it from dev_get_drvdata().
>
> 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
> or frontend_changed()).
>
> This patch adds a reference from xenvif to backend_info so that it would be
> much more easier to obtain backend_info during coredump analysis.
>
> Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Applied to net-next.
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
2019-04-12 6:53 ` [Xen-devel] " Dongli Zhang
` (2 preceding siblings ...)
(?)
@ 2019-04-12 17:10 ` David Miller
-1 siblings, 0 replies; 9+ messages in thread
From: David Miller @ 2019-04-12 17:10 UTC (permalink / raw)
To: dongli.zhang
Cc: wei.liu2, netdev, joe.jin, linux-kernel, junxiao.bi,
paul.durrant, jie.l.li, xen-devel
From: Dongli Zhang <dongli.zhang@oracle.com>
Date: Fri, 12 Apr 2019 14:53:24 +0800
> During coredump analysis, it is not easy to obtain the address of
> backend_info in xen-netback.
>
> So far there are two ways to obtain backend_info:
>
> 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
> and then derive it from dev_get_drvdata().
>
> 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
> or frontend_changed()).
>
> This patch adds a reference from xenvif to backend_info so that it would be
> much more easier to obtain backend_info during coredump analysis.
>
> Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Applied to net-next.
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [Xen-devel] [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
@ 2019-04-12 17:10 ` David Miller
0 siblings, 0 replies; 9+ messages in thread
From: David Miller @ 2019-04-12 17:10 UTC (permalink / raw)
To: dongli.zhang
Cc: wei.liu2, netdev, joe.jin, linux-kernel, junxiao.bi,
paul.durrant, jie.l.li, xen-devel
From: Dongli Zhang <dongli.zhang@oracle.com>
Date: Fri, 12 Apr 2019 14:53:24 +0800
> During coredump analysis, it is not easy to obtain the address of
> backend_info in xen-netback.
>
> So far there are two ways to obtain backend_info:
>
> 1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
> and then derive it from dev_get_drvdata().
>
> 2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
> or frontend_changed()).
>
> This patch adds a reference from xenvif to backend_info so that it would be
> much more easier to obtain backend_info during coredump analysis.
>
> Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Applied to net-next.
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply [flat|nested] 9+ messages in thread
* [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
@ 2019-04-12 6:53 Dongli Zhang
0 siblings, 0 replies; 9+ messages in thread
From: Dongli Zhang @ 2019-04-12 6:53 UTC (permalink / raw)
To: xen-devel, netdev
Cc: wei.liu2, joe.jin, linux-kernel, junxiao.bi, paul.durrant,
jie.l.li, davem
During coredump analysis, it is not easy to obtain the address of
backend_info in xen-netback.
So far there are two ways to obtain backend_info:
1. Do what xenbus_device_find() does for vmcore to find the xenbus_device
and then derive it from dev_get_drvdata().
2. Extract backend_info from callstack of xenwatch (e.g., netback_remove()
or frontend_changed()).
This patch adds a reference from xenvif to backend_info so that it would be
much more easier to obtain backend_info during coredump analysis.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
---
drivers/net/xen-netback/common.h | 18 ++++++++++++++++++
drivers/net/xen-netback/xenbus.c | 17 +----------------
2 files changed, 19 insertions(+), 16 deletions(-)
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h
index 936c0b3..05847eb 100644
--- a/drivers/net/xen-netback/common.h
+++ b/drivers/net/xen-netback/common.h
@@ -248,6 +248,22 @@ struct xenvif_hash {
struct xenvif_hash_cache cache;
};
+struct backend_info {
+ struct xenbus_device *dev;
+ struct xenvif *vif;
+
+ /* This is the state that will be reflected in xenstore when any
+ * active hotplug script completes.
+ */
+ enum xenbus_state state;
+
+ enum xenbus_state frontend_state;
+ struct xenbus_watch hotplug_status_watch;
+ u8 have_hotplug_status_watch:1;
+
+ const char *hotplug_script;
+};
+
struct xenvif {
/* Unique identifier for this interface. */
domid_t domid;
@@ -283,6 +299,8 @@ struct xenvif {
struct xenbus_watch credit_watch;
struct xenbus_watch mcast_ctrl_watch;
+ struct backend_info *be;
+
spinlock_t lock;
#ifdef CONFIG_DEBUG_FS
diff --git a/drivers/net/xen-netback/xenbus.c b/drivers/net/xen-netback/xenbus.c
index 330ddb6..41c9e8f 100644
--- a/drivers/net/xen-netback/xenbus.c
+++ b/drivers/net/xen-netback/xenbus.c
@@ -22,22 +22,6 @@
#include <linux/vmalloc.h>
#include <linux/rtnetlink.h>
-struct backend_info {
- struct xenbus_device *dev;
- struct xenvif *vif;
-
- /* This is the state that will be reflected in xenstore when any
- * active hotplug script completes.
- */
- enum xenbus_state state;
-
- enum xenbus_state frontend_state;
- struct xenbus_watch hotplug_status_watch;
- u8 have_hotplug_status_watch:1;
-
- const char *hotplug_script;
-};
-
static int connect_data_rings(struct backend_info *be,
struct xenvif_queue *queue);
static void connect(struct backend_info *be);
@@ -472,6 +456,7 @@ static int backend_create_xenvif(struct backend_info *be)
return err;
}
be->vif = vif;
+ vif->be = be;
kobject_uevent(&dev->dev.kobj, KOBJ_ONLINE);
return 0;
--
2.7.4
_______________________________________________
Xen-devel mailing list
Xen-devel@lists.xenproject.org
https://lists.xenproject.org/mailman/listinfo/xen-devel
^ permalink raw reply related [flat|nested] 9+ messages in thread
end of thread, other threads:[~2019-04-12 17:11 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz / follow: Atom feed)
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2019-04-12 6:53 [PATCH 1/1] xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis Dongli Zhang
2019-04-12 6:53 ` [Xen-devel] " Dongli Zhang
2019-04-12 14:28 ` Wei Liu
2019-04-12 14:28 ` Wei Liu
2019-04-12 14:28 ` [Xen-devel] " Wei Liu
2019-04-12 17:10 ` David Miller
2019-04-12 17:10 ` David Miller
2019-04-12 17:10 ` [Xen-devel] " David Miller
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2019-04-12 6:53 Dongli Zhang
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