[Qemu-devel] [PATCH 4/4] virtio-9p: Remove migration blockers.

["Benoît Canet" <benoit@irqsave.net>]

Signed-off-by: Benoit Canet <benoit@irqsave.net>
---
 hw/9pfs/virtio-9p-device.c |    2 --
 hw/9pfs/virtio-9p.c        |   23 -----------------------
 hw/9pfs/virtio-9p.h        |    2 --
 3 files changed, 27 deletions(-)

diff --git a/hw/9pfs/virtio-9p-device.c b/hw/9pfs/virtio-9p-device.c
index 02b8630..f91a9b8 100644
--- a/hw/9pfs/virtio-9p-device.c
+++ b/hw/9pfs/virtio-9p-device.c
@@ -86,7 +86,6 @@ static void virtio_9p_save(QEMUFile *f, void *opaque)
 
     qemu_put_be32(f, s->proto_version);
     qemu_put_be32(f, s->msize);
-    qemu_put_be32(f, s->root_fid);
 }
 
 static void virtio_9p_load_path(QEMUFile *f, V9fsPath *path)
@@ -160,7 +159,6 @@ static int virtio_9p_load(QEMUFile *f, void *opaque, int version_id)
 
     s->proto_version  = qemu_get_be32(f);
     s->msize          = qemu_get_be32(f);
-    s->root_fid       = qemu_get_be32(f);
 
     return 0;
 }
diff --git a/hw/9pfs/virtio-9p.c b/hw/9pfs/virtio-9p.c
index 3bf3ee4..b46924f 100644
--- a/hw/9pfs/virtio-9p.c
+++ b/hw/9pfs/virtio-9p.c
@@ -399,19 +399,6 @@ static int put_fid(V9fsPDU *pdu, V9fsFidState *fidp)
      * Don't free the fid if it is in reclaim list
      */
     if (!fidp->ref && fidp->clunked) {
-        if (fidp->fid == pdu->s->root_fid) {
-            /*
-             * if the clunked fid is root fid then we
-             * have unmounted the fs on the client side.
-             * delete the migration blocker. Ideally, this
-             * should be hooked to transport close notification
-             */
-            if (pdu->s->migration_blocker) {
-                migrate_del_blocker(pdu->s->migration_blocker);
-                error_free(pdu->s->migration_blocker);
-                pdu->s->migration_blocker = NULL;
-            }
-        }
         return free_fid(pdu, fidp);
     }
     return 0;
@@ -1048,16 +1035,6 @@ static void v9fs_attach(void *opaque)
     err += offset;
     trace_v9fs_attach_return(pdu->tag, pdu->id,
                              qid.type, qid.version, qid.path);
-    /*
-     * disable migration if we haven't done already.
-     * attach could get called multiple times for the same export.
-     */
-    if (!s->migration_blocker) {
-        s->root_fid = fid;
-        error_set(&s->migration_blocker, QERR_VIRTFS_FEATURE_BLOCKS_MIGRATION,
-                  s->ctx.fs_root ? s->ctx.fs_root : "NULL", s->tag);
-        migrate_add_blocker(s->migration_blocker);
-    }
 out:
     put_fid(pdu, fidp);
 out_nofid:
diff --git a/hw/9pfs/virtio-9p.h b/hw/9pfs/virtio-9p.h
index 4d16d46..94d6f76 100644
--- a/hw/9pfs/virtio-9p.h
+++ b/hw/9pfs/virtio-9p.h
@@ -223,8 +223,6 @@ typedef struct V9fsState
      * on rename.
      */
     CoRwlock rename_lock;
-    int32_t root_fid;
-    Error *migration_blocker;
 } V9fsState;
 
 typedef struct V9fsStatState {
-- 
1.7.10.4