[libvirt] [PATCH v4 4/6] conf: util: Add API to find net def given its domain's hostdev

[Jai Singh Rana]

Introduce API virDomainNetFindByHostdev which retrieves net def in
given domain for the given hostdev def. This API will now be used by
virDomainNetFind to further probe net for hostdev network devices.

Signed-off-by: Jai Singh Rana <JaiSingh.Rana at cavium.com>
---
 src/conf/domain_conf.c   | 43 +++++++++++++++++++++++++++++++++++++++++++
 src/conf/domain_conf.h   |  2 ++
 src/libvirt_private.syms |  2 ++
 src/util/virhostdev.c    |  2 +-
 src/util/virhostdev.h    |  3 +++
 5 files changed, 51 insertions(+), 1 deletion(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index d8cb7f37f3..8432215d19 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -56,6 +56,7 @@
 #include "virsecret.h"
 #include "virstring.h"
 #include "virnetdev.h"
+#include "virnetdevhostdev.h"
 #include "virnetdevmacvlan.h"
 #include "virhostdev.h"
 #include "virmdev.h"
@@ -29064,6 +29065,37 @@ virDomainNetFind(virDomainDefPtr def, const char *device)
 
 
 /**
+ * virDomainNetFindByHostdev:
+ * @def: domain's def
+ * @hostdev: hostdev whose net def if exists to be retrieved
+ *
+ * Finds net def in domain given the domain's hostdev.
+ *
+ * Returns a pointer to the net def or NULL if not found.
+ */
+virDomainNetDefPtr
+virDomainNetFindByHostdev(virDomainDefPtr def,
+                          virDomainHostdevDefPtr hostdev)
+{
+    size_t i;
+    virDomainNetType actualType;
+    virDomainHostdevDefPtr hostdef = NULL;
+
+    for (i = 0; i < def->nnets; i++) {
+         actualType = virDomainNetGetActualType(def->nets[i]);
+         if (actualType == VIR_DOMAIN_NET_TYPE_HOSTDEV)
+             hostdef = virDomainNetGetActualHostdev(def->nets[i]);
+         else
+             continue;
+         if  (!memcmp(hostdev, hostdef, sizeof(virDomainHostdevDef)))
+              return def->nets[i];
+    }
+
+    return NULL;
+}
+
+
+/**
  * virDomainNetFindByName:
  * @def: domain's def
  * @ifname: interface name
@@ -29077,12 +29109,23 @@ virDomainNetFindByName(virDomainDefPtr def,
                        const char *ifname)
 {
     size_t i;
+    virDomainNetDefPtr net = NULL;
 
     for (i = 0; i < def->nnets; i++) {
         if (STREQ_NULLABLE(ifname, def->nets[i]->ifname))
             return def->nets[i];
     }
 
+    /* Give a try to hostdev if its a switchdev network device*/
+    for (i = 0; i < def->nhostdevs; i++) {
+         if (!virHostdevIsPCINetDevice(def->hostdevs[i]))
+             continue;
+         if (virNetdevHostdevCheckVFRIfName(def->hostdevs[i], ifname)) {
+             if ((net = virDomainNetFindByHostdev(def, def->hostdevs[i])))
+                 return net;
+         }
+    }
+
     return NULL;
 }
 
diff --git a/src/conf/domain_conf.h b/src/conf/domain_conf.h
index 0924fc4f3c..ccec74e51d 100644
--- a/src/conf/domain_conf.h
+++ b/src/conf/domain_conf.h
@@ -3146,6 +3146,8 @@ int virDomainDiskSourceParse(xmlNodePtr node,
 
 int virDomainNetFindIdx(virDomainDefPtr def, virDomainNetDefPtr net);
 virDomainNetDefPtr virDomainNetFind(virDomainDefPtr def, const char *device);
+virDomainNetDefPtr virDomainNetFindByHostdev(virDomainDefPtr def,
+                                             virDomainHostdevDefPtr hostdev);
 virDomainNetDefPtr virDomainNetFindByName(virDomainDefPtr def, const char *ifname);
 bool virDomainHasNet(virDomainDefPtr def, virDomainNetDefPtr net);
 int virDomainNetInsert(virDomainDefPtr def, virDomainNetDefPtr net);
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 5aa8f7ed64..e4d8583d41 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -449,6 +449,7 @@ virDomainNetDefClear;
 virDomainNetDefFormat;
 virDomainNetDefFree;
 virDomainNetFind;
+virDomainNetFindByHostdev;
 virDomainNetFindByName;
 virDomainNetFindIdx;
 virDomainNetGenerateMAC;
@@ -1966,6 +1967,7 @@ virHostCPUStatsAssign;
 # util/virhostdev.h
 virHostdevFindUSBDevice;
 virHostdevIsMdevDevice;
+virHostdevIsPCINetDevice;
 virHostdevIsSCSIDevice;
 virHostdevManagerGetDefault;
 virHostdevNetDevice;
diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c
index c6ee725860..2b8ecb9649 100644
--- a/src/util/virhostdev.c
+++ b/src/util/virhostdev.c
@@ -348,7 +348,7 @@ virHostdevNetDevice(virDomainHostdevDefPtr hostdev,
 }
 
 
-static bool
+bool
 virHostdevIsPCINetDevice(virDomainHostdevDefPtr hostdev)
 {
     return hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
diff --git a/src/util/virhostdev.h b/src/util/virhostdev.h
index 7412a20aa9..71faaf4e7a 100644
--- a/src/util/virhostdev.h
+++ b/src/util/virhostdev.h
@@ -197,6 +197,9 @@ virHostdevReAttachDomainDevices(virHostdevManagerPtr mgr,
                                 const char *oldStateDir)
     ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
 bool
+virHostdevIsPCINetDevice(virDomainHostdevDefPtr hostdev)
+    ATTRIBUTE_NONNULL(1);
+bool
 virHostdevIsSCSIDevice(virDomainHostdevDefPtr hostdev)
     ATTRIBUTE_NONNULL(1);
 bool
-- 
2.13.7