[libvirt PATCH] conf: virtiofs: validate that the target dir is unique even for hotplug

[Ján Tomko <jtomko@xxxxxxxxxx>]

https://bugzilla.redhat.com/show_bug.cgi?id=2171384

Signed-off-by: Ján Tomko <jtomko@xxxxxxxxxx>
---
 src/conf/domain_validate.c | 28 ++++++++++++++++++++--------
 src/conf/domain_validate.h |  2 ++
 src/libvirt_private.syms   |  1 +
 3 files changed, 23 insertions(+), 8 deletions(-)

diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
index 80d6a2ffd9..4c76eb7f46 100644
--- a/src/conf/domain_validate.c
+++ b/src/conf/domain_validate.c
@@ -1735,8 +1735,9 @@ virDomainDefIOMMUValidate(const virDomainDef *def)
 }
 
 
-static int
-virDomainDefFSValidate(const virDomainDef *def)
+int
+virDomainDefFSValidate(const virDomainDef *def,
+                       const virDomainFSDef *newfs)
 {
     size_t i;
     g_autoptr(GHashTable) dsts = virHashNew(NULL);
@@ -1754,8 +1755,18 @@ virDomainDefFSValidate(const virDomainDef *def)
             return -1;
         }
 
-        if (virHashAddEntry(dsts, fs->dst, (void *) 0x1) < 0)
+        if (virHashAddEntry(dsts, fs->dst, (void *) fs) < 0)
+            return -1;
+    }
+
+    if (newfs) {
+        const virDomainFSDef *fs = g_hash_table_lookup(dsts, newfs->dst);
+        if (fs && fs != newfs) {
+            virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
+                           _("filesystem target '%1$s' specified twice"),
+                           newfs->dst);
             return -1;
+        }
     }
 
     return 0;
@@ -1856,9 +1867,6 @@ virDomainDefValidateInternal(const virDomainDef *def,
     if (virDomainNumaDefValidate(def->numa) < 0)
         return -1;
 
-    if (virDomainDefFSValidate(def) < 0)
-        return -1;
-
     if (virDomainDefValidateIOThreads(def) < 0)
         return -1;
 
@@ -2573,7 +2581,8 @@ virDomainShmemDefValidate(const virDomainShmemDef *shmem)
 }
 
 static int
-virDomainFSDefValidate(const virDomainFSDef *fs)
+virDomainFSDefValidate(const virDomainDef *def,
+                       const virDomainFSDef *fs)
 {
     if (fs->dst == NULL) {
         const char *source = fs->src->path;
@@ -2592,6 +2601,9 @@ virDomainFSDefValidate(const virDomainFSDef *fs)
         return -1;
     }
 
+    if (virDomainDefFSValidate(def, fs) < 0)
+        return -1;
+
     return 0;
 }
 
@@ -2885,7 +2897,7 @@ virDomainDeviceDefValidateInternal(const virDomainDeviceDef *dev,
         return virDomainShmemDefValidate(dev->data.shmem);
 
     case VIR_DOMAIN_DEVICE_FS:
-        return virDomainFSDefValidate(dev->data.fs);
+        return virDomainFSDefValidate(def, dev->data.fs);
 
     case VIR_DOMAIN_DEVICE_AUDIO:
         return virDomainAudioDefValidate(def, dev->data.audio);
diff --git a/src/conf/domain_validate.h b/src/conf/domain_validate.h
index fc441cef5b..437cbe4d2e 100644
--- a/src/conf/domain_validate.h
+++ b/src/conf/domain_validate.h
@@ -47,3 +47,5 @@ int virDomainDiskDefSourceLUNValidate(const virStorageSource *src);
 
 int virDomainDefOSValidate(const virDomainDef *def,
                            virDomainXMLOption *xmlopt);
+int virDomainDefFSValidate(const virDomainDef *def,
+                           const virDomainFSDef *newfs);
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index 436d5a0770..65089c1aaa 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -793,6 +793,7 @@ virDomainDefPostParse;
 
 # conf/domain_validate.h
 virDomainActualNetDefValidate;
+virDomainDefFSValidate;
 virDomainDefOSValidate;
 virDomainDefValidate;
 virDomainDeviceValidateAliasForHotplug;
-- 
2.40.1