diff mbox

[v2,13/16] block: vmdk image file reopen

Message ID 3583acfcc60f30a05a16ff8c108477faf93f5a36.1347548248.git.jcody@redhat.com
State New
Headers show

Commit Message

Jeff Cody Sept. 13, 2012, 3:49 p.m. UTC 
This patch supports reopen for VMDK image files.  VMDK extents are added
to the existing reopen queue, so that the transactional model of reopen
is maintained with multiple image files.

Signed-off-by: Jeff Cody <jcody@redhat.com>
---
 block/vmdk.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
diff mbox

Patch

diff --git a/block/vmdk.c b/block/vmdk.c
index bba4c61..426dfc6 100644
--- a/block/vmdk.c
+++ b/block/vmdk.c
@@ -300,6 +300,50 @@  static int vmdk_is_cid_valid(BlockDriverState *bs)
     return 1;
 }
 
+/* Queue extents, if any, for reopen() */
+static int vmdk_reopen_prepare(BDRVReopenState *state, Error **errp)
+{
+    BDRVVmdkState *s;
+    int ret = -1;
+    int i;
+    VmdkExtent *e;
+
+    assert(state != NULL);
+    assert(state->bs != NULL);
+
+    if (state->queue == NULL) {
+        error_set(errp, ERROR_CLASS_GENERIC_ERROR,
+                 "No reopen queue for VMDK extents");
+        goto exit;
+    }
+
+    s = state->bs->opaque;
+
+    assert(s != NULL);
+
+    for (i = 0; i < s->num_extents; i++) {
+        e = &s->extents[i];
+        if (e->file != state->bs->file) {
+            bdrv_reopen_queue(state->queue, e->file, state->flags);
+        }
+    }
+    ret = 0;
+
+exit:
+    return ret;
+}
+
+/* No action for commit, or abort.  All VMDK has to do is
+ * queue the extents for reopen */
+static void vmdk_reopen_commit(BDRVReopenState *state)
+{
+}
+
+static void vmdk_reopen_abort(BDRVReopenState *state)
+{
+}
+
+
 static int vmdk_parent_open(BlockDriverState *bs)
 {
     char *p_name;
@@ -1646,6 +1690,9 @@  static BlockDriver bdrv_vmdk = {
     .instance_size  = sizeof(BDRVVmdkState),
     .bdrv_probe     = vmdk_probe,
     .bdrv_open      = vmdk_open,
+    .bdrv_reopen_prepare = vmdk_reopen_prepare,
+    .bdrv_reopen_commit  = vmdk_reopen_commit,
+    .bdrv_reopen_abort   = vmdk_reopen_abort,
     .bdrv_read      = vmdk_co_read,
     .bdrv_write     = vmdk_co_write,
     .bdrv_close     = vmdk_close,