Fix vitastor-disk resize to smaller size clearing all data O_o, add a test for it

src/cmd/cli_flatten.cpp

@@ -97,9 +97,9 @@ struct snap_flattener_t
             { "from", top_parent_name },
             { "to", target_name },
             { "target", target_name },
-            { "delete-source", false },
+            { "delete_source", false },
             { "cas", use_cas },
-            { "fsync-interval", fsync_interval },
+            { "fsync_interval", fsync_interval },
         });
         // Wait for it
 resume_1:

src/cmd/cli_modify.cpp

@@ -110,9 +110,9 @@ struct image_changer_t
                 cb = parent->start_rm_data(json11::Json::object {
                     { "inode", INODE_NO_POOL(inode_num) },
                     { "pool", (uint64_t)INODE_POOL(inode_num) },
-                    { "fsync-interval", fsync_interval },
+                    { "fsync_interval", fsync_interval },
-                    { "min-offset", ((new_size+4095)/4096)*4096 },
+                    { "min_offset", ((new_size+4095)/4096)*4096 },
-                    { "down-ok", down_ok },
+                    { "down_ok", down_ok },
                 });
 resume_1:
                 while (!cb(result))

src/cmd/cli_rm.cpp

@@ -636,9 +636,9 @@ resume_100:
             { "from", from_name },
             { "to", child_it->second.name },
             { "target", target_it->second.name },
-            { "delete-source", false },
+            { "delete_source", false },
             { "cas", use_cas },
-            { "fsync-interval", fsync_interval },
+            { "fsync_interval", fsync_interval },
         });
     }
 
@@ -677,8 +677,8 @@ resume_100:
         cb = parent->start_rm_data(json11::Json::object {
             { "inode", inode },
             { "pool", (uint64_t)INODE_POOL(inode) },
-            { "fsync-interval", fsync_interval },
+            { "fsync_interval", fsync_interval },
-            { "down-ok", down_ok },
+            { "down_ok", down_ok },
         });
     }
 };

tests/test_rm.sh

@@ -10,4 +10,18 @@ $ETCDCTL get --prefix '/vitastor/pg/state'
 
 $VITASTOR_CLI rm-data --pool 1 --inode 1
 
+# test resize with partial data removal
+
+$VITASTOR_CLI create -s 128M testimg
+
+$VITASTOR_FIO -bs=4M -direct=1 -iodepth=1 -end_fsync=1 -fsync=1 -rw=write -image=testimg
+
+$VITASTOR_CLI modify --resize 64M testimg
+
+$VITASTOR_CLI dd iimg=testimg of=./testdata/bin/testimg.bin
+
+sz=$(stat -c %s ./testdata/bin/testimg.bin)
+
+[[ "$sz" = 67108864 ]] || format_error "File size is $sz bytes after resize to 64 M"
+
 format_green OK