[Qemu-devel] [PATCH 2/2] qemu/9p: Don't ignore error in fid clunk

[Aneesh Kumar K.V]

From: "Aneesh Kumar K.V" <address@hidden>

We use the clunk request to do the actual xattr operation. So don't
ignore the error value for fid clunk.

Security model "none" don't support posix acl. Without this patch
guest won't get EOPNOTSUPP error on setxattr("system.posix_acl_access")

Signed-off-by: Aneesh Kumar K.V <address@hidden>
---
 hw/9pfs/virtio-9p.c |   12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 0aaf0d2..f526467 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -327,7 +327,7 @@ static int free_fid(V9fsPDU *pdu, V9fsFidState *fidp)
     return retval;
 }
 
-static void put_fid(V9fsPDU *pdu, V9fsFidState *fidp)
+static int put_fid(V9fsPDU *pdu, V9fsFidState *fidp)
 {
     BUG_ON(!fidp->ref);
     fidp->ref--;
@@ -348,8 +348,9 @@ static void put_fid(V9fsPDU *pdu, V9fsFidState *fidp)
                 pdu->s->migration_blocker = NULL;
             }
         }
-        free_fid(pdu, fidp);
+        return free_fid(pdu, fidp);
     }
+    return 0;
 }
 
 static V9fsFidState *clunk_fid(V9fsState *s, int32_t fid)
@@ -1537,9 +1538,10 @@ static void v9fs_clunk(void *opaque)
      * free the fid.
      */
     fidp->ref++;
-    err = offset;
-
-    put_fid(pdu, fidp);
+    err = put_fid(pdu, fidp);
+    if (!err) {
+        err = offset;
+    }
 out_nofid:
     complete_pdu(s, pdu, err);
 }
-- 
1.7.10