Update Tools library to be better compatible with VOL connectors

Modify h5repack to integrate with VOL connectors

Update tools library to accomodate VOL connectors

Update logic in h5tools_fopen for VOL connectors

Add command-line options to h5repack for specifying in/out VOL
connectors

Implement h5tools_set_vol_fapl

Fix library shutdown issue

Integrate ROS3 and HDFS VFDs into new h5tools_get_fapl() scheme

Avoid H5Ocopy in h5repack when using different VOL connectors

Update h5tools_test_utils.c for ROS3 and HDFS integration

1 files changed, 12 insertions, 0 deletions

diff --git a/src/H5VLpassthru.c b/src/H5VLpassthru.c
index 8b3dc62..2cf470e 100644
--- a/src/H5VLpassthru.c
+++ b/src/H5VLpassthru.c
@@ -1591,6 +1591,10 @@ H5VL_pass_through_file_create(const char *name, unsigned flags, hid_t fcpl_id,
     /* Get copy of our VOL info from FAPL */
     H5Pget_vol_info(fapl_id, (void **)&info);
 
+    /* Make sure we have info about the underlying VOL to be used */
+    if (!info)
+        return NULL;
+
     /* Copy the FAPL */
     under_fapl_id = H5Pcopy(fapl_id);
 
@@ -1645,6 +1649,10 @@ H5VL_pass_through_file_open(const char *name, unsigned flags, hid_t fapl_id,
     /* Get copy of our VOL info from FAPL */
     H5Pget_vol_info(fapl_id, (void **)&info);
 
+    /* Make sure we have info about the underlying VOL to be used */
+    if (!info)
+        return NULL;
+
     /* Copy the FAPL */
     under_fapl_id = H5Pcopy(fapl_id);
 
@@ -1785,6 +1793,10 @@ H5VL_pass_through_file_specific(void *file, H5VL_file_specific_t specific_type,
         /* Get copy of our VOL info from FAPL */
         H5Pget_vol_info(fapl_id, (void **)&info);
 
+        /* Make sure we have info about the underlying VOL to be used */
+        if (!info)
+            return (-1);
+
         /* Copy the FAPL */
         under_fapl_id = H5Pcopy(fapl_id);