conf: Introduce virDomainDiskByTarget

Introduce a simpler replacement for virDomainDiskByName when looking up
by disk target.
Signed-off-by: NPeter Krempa <pkrempa@redhat.com>
Reviewed-by: NDaniel Henrique Barboza <danielhb413@gmail.com>

src/conf/domain_conf.c

@@ -16905,6 +16905,22 @@ virDomainDiskByName(virDomainDefPtr def,
     return idx < 0 ? NULL : def->disks[idx];
 }
 
+
+virDomainDiskDefPtr
+virDomainDiskByTarget(virDomainDefPtr def,
+                      const char *dst)
+{
+    size_t i;
+
+    for (i = 0; i < def->ndisks; i++) {
+        if (STREQ(def->disks[i]->dst, dst))
+            return def->disks[i];
+    }
+
+    return NULL;
+}
+
+
 int virDomainDiskInsert(virDomainDefPtr def,
                         virDomainDiskDefPtr disk)
 {

src/conf/domain_conf.h

@@ -3162,6 +3162,10 @@ int virDomainDiskIndexByName(virDomainDefPtr def, const char *name,
 virDomainDiskDefPtr virDomainDiskByName(virDomainDefPtr def,
                                         const char *name,
                                         bool allow_ambiguous);
+virDomainDiskDefPtr
+virDomainDiskByTarget(virDomainDefPtr def,
+                      const char *dst);
+
 int virDomainDiskInsert(virDomainDefPtr def,
                         virDomainDiskDefPtr disk)
     G_GNUC_WARN_UNUSED_RESULT;

src/libvirt_private.syms

@@ -331,6 +331,7 @@ virDomainDiskBackingStoreParse;
 virDomainDiskBusTypeToString;
 virDomainDiskByAddress;
 virDomainDiskByName;
+virDomainDiskByTarget;
 virDomainDiskCacheTypeFromString;
 virDomainDiskCacheTypeToString;
 virDomainDiskDefAssignAddress;