[PATCH 7/9] migration: don't remember image labels when migrating with shared fs

[Peng Liang <liangpeng10@xxxxxxxxxx>]

When migrating with shared fs, the image labels has been remembered and
the ownership of the image has been set in the src host.  If the dst
host remembers the ownership of the image again, the ownership of the
image remembered in the src host (the origin ownership) will lost.

Signed-off-by: Peng Liang <liangpeng10@xxxxxxxxxx>
---
 src/security/security_dac.c | 32 +++++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 9 deletions(-)

diff --git a/src/security/security_dac.c b/src/security/security_dac.c
index b16552b2559e..bd342fd20312 100644
--- a/src/security/security_dac.c
+++ b/src/security/security_dac.c
@@ -867,7 +867,8 @@ virSecurityDACSetImageLabelSingle(virSecurityManager *mgr,
                                   virDomainDef *def,
                                   virStorageSource *src,
                                   virStorageSource *parent,
-                                  bool isChainTop)
+                                  bool isChainTop,
+                                  bool migrated)
 {
     virSecurityLabelDef *secdef;
     virSecurityDeviceLabelDef *disk_seclabel;
@@ -931,7 +932,8 @@ virSecurityDACSetImageLabelSingle(virSecurityManager *mgr,
      * but the top layer, or read only image, or disk explicitly
      * marked as shared.
      */
-    remember = isChainTop && !src->readonly && !src->shared;
+    remember = isChainTop && !src->readonly && !src->shared &&
+               !(migrated && virFileIsSharedFS(src->path) > 0);
 
     return virSecurityDACSetOwnership(mgr, src, NULL, user, group, remember);
 }
@@ -942,14 +944,15 @@ virSecurityDACSetImageLabelRelative(virSecurityManager *mgr,
                                     virDomainDef *def,
                                     virStorageSource *src,
                                     virStorageSource *parent,
-                                    virSecurityDomainImageLabelFlags flags)
+                                    virSecurityDomainImageLabelFlags flags,
+                                    bool migrated)
 {
     virStorageSource *n;
 
     for (n = src; virStorageSourceIsBacking(n); n = n->backingStore) {
         const bool isChainTop = flags & VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP;
 
-        if (virSecurityDACSetImageLabelSingle(mgr, def, n, parent, isChainTop) < 0)
+        if (virSecurityDACSetImageLabelSingle(mgr, def, n, parent, isChainTop, migrated) < 0)
             return -1;
 
         if (!(flags & VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN))
@@ -961,13 +964,23 @@ virSecurityDACSetImageLabelRelative(virSecurityManager *mgr,
     return 0;
 }
 
+static int
+virSecurityDACSetImageLabelInt(virSecurityManager *mgr,
+                               virDomainDef *def,
+                               virStorageSource *src,
+                               virSecurityDomainImageLabelFlags flags,
+                               bool migrated)
+{
+    return virSecurityDACSetImageLabelRelative(mgr, def, src, src, flags, migrated);
+}
+
 static int
 virSecurityDACSetImageLabel(virSecurityManager *mgr,
                             virDomainDef *def,
                             virStorageSource *src,
                             virSecurityDomainImageLabelFlags flags)
 {
-    return virSecurityDACSetImageLabelRelative(mgr, def, src, src, flags);
+    return virSecurityDACSetImageLabelInt(mgr, def, src, flags, false);
 }
 
 static int
@@ -2116,7 +2129,7 @@ virSecurityDACSetAllLabel(virSecurityManager *mgr,
                           virDomainDef *def,
                           const char *incomingPath G_GNUC_UNUSED,
                           bool chardevStdioLogd,
-                          bool migrated G_GNUC_UNUSED)
+                          bool migrated)
 {
     virSecurityDACData *priv = virSecurityManagerGetPrivateData(mgr);
     virSecurityLabelDef *secdef;
@@ -2138,9 +2151,10 @@ virSecurityDACSetAllLabel(virSecurityManager *mgr,
         /* XXX fixme - we need to recursively label the entire tree :-( */
         if (virDomainDiskGetType(def->disks[i]) == VIR_STORAGE_TYPE_DIR)
             continue;
-        if (virSecurityDACSetImageLabel(mgr, def, def->disks[i]->src,
-                                        VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN |
-                                        VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP) < 0)
+        if (virSecurityDACSetImageLabelInt(mgr, def, def->disks[i]->src,
+                                           VIR_SECURITY_DOMAIN_IMAGE_LABEL_BACKING_CHAIN |
+                                           VIR_SECURITY_DOMAIN_IMAGE_PARENT_CHAIN_TOP,
+                                           migrated) < 0)
             return -1;
     }
 
-- 
2.31.1