If refreshed inode is snapshot, we can reload entire inode and switch
to working VDI immediately.
Cc: Teruaki Ishizaki <ishizaki.teruaki@xxxxxxxxxxxxx>
Cc: Takashi Menjo <menjo.takashi@xxxxxxxxxxxxx>
Tested-by: Takashi Menjo <menjo.takashi@xxxxxxxxxxxxx>
Signed-off-by: Hitoshi Mitake <mitake.hitoshi@xxxxxxxxxxxxx>
---
usr/bs_sheepdog.c | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/usr/bs_sheepdog.c b/usr/bs_sheepdog.c
index ecb5033..8f228b5 100644
--- a/usr/bs_sheepdog.c
+++ b/usr/bs_sheepdog.c
@@ -704,6 +704,34 @@ static int reload_inode(struct sheepdog_access_info *ai, int is_snapshot)
ret = -1;
goto ret;
}
+
+ if (!!ai->inode.snap_ctime) {
+ /*
+ * This is a case like below:
+ * take snapshot -> write something -> failover
+ *
+ * Because invalidated inode is readonly and latest
+ * working VDI can have COWed objects, we need to
+ * resolve VID and reload its entire inode object.
+ */
+ memset(tag, 0, sizeof(tag));
+
+ ret = find_vdi_name(ai, ai->inode.name, CURRENT_VDI_ID,
+ tag, &vid, 0);
+ if (ret) {
+ ret = -1;
+ goto ret;
+ }
+
+ ret = read_object(ai, (char *)&ai->inode,
+ vid_to_vdi_oid(vid),
+ ai->inode.nr_copies, SD_INODE_SIZE, 0,
+ &need_reload);
+ if (ret) {
+ ret = -1;
+ goto ret;
+ }
+ }
}
ai->min_dirty_data_idx = UINT32_MAX;
--
2.7.4
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