diff options
| author | Dongli Zhang <dongli.zhang@oracle.com> | 2019-04-12 14:53:24 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2019-04-12 10:10:28 -0700 |
| commit | 6dc400af216a79c10cb082f25a7337bcbf532045 (patch) | |
| tree | 26989f2a1ffae70d912a5f017767bd94066cd117 /drivers/net/xen-netback/common.h | |
| parent | 8af9f7291e22d165ea630856da4171a9d5a6ced3 (diff) | |
xen-netback: add reference from xenvif to backend_info to facilitate coredump analysis
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>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback/common.h')
| -rw-r--r-- | drivers/net/xen-netback/common.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/net/xen-netback/common.h b/drivers/net/xen-netback/common.h index 936c0b3e0ba2..05847eb91a1b 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 |