storage: improve directory support in gluster pool

Take advantage of the previous patch's addition of 'netdir' as
a distinct volume type, to expose rather than silently skip
directories embedded in a gluster pool.  Also serves as an XML
validation for the previous patch.

* src/storage/storage_backend_gluster.c
(virStorageBackendGlusterRefreshVol): Don't skip directories.
* tests/storagevolxml2xmltest.c (mymain): Add test.
* tests/storagevolxml2xmlin/vol-gluster-dir.xml: New file.
* tests/storagevolxml2xmlout/vol-gluster-dir.xml: Likewise.
Signed-off-by: NEric Blake <eblake@redhat.com>

src/storage/storage_backend_gluster.c

@@ -165,9 +165,6 @@ virStorageBackendGlusterRefreshVol(virStorageBackendGlusterStatePtr state,
     /* Silently skip '.' and '..'.  */
     if (STREQ(name, ".") || STREQ(name, ".."))
         return 0;
-    /* FIXME: support directories.  For now, silently skip them.  */
-    if (S_ISDIR(st->st_mode))
-        return 0;
 
     if (VIR_ALLOC(vol) < 0)
         goto cleanup;
@@ -177,7 +174,6 @@ virStorageBackendGlusterRefreshVol(virStorageBackendGlusterStatePtr state,
                     vol->name) < 0)
         goto cleanup;
 
-    vol->type = VIR_STORAGE_VOL_NETWORK;
     tmp = state->uri->path;
     state->uri->path = vol->key;
     if (!(vol->target.path = virURIFormat(state->uri))) {
@@ -186,7 +182,17 @@ virStorageBackendGlusterRefreshVol(virStorageBackendGlusterStatePtr state,
     }
     state->uri->path = tmp;
 
+    if (S_ISDIR(st->st_mode)) {
+        vol->type = VIR_STORAGE_VOL_NETDIR;
+        vol->target.format = VIR_STORAGE_FILE_DIR;
+        *volptr = vol;
+        vol = NULL;
+        ret = 0;
+        goto cleanup;
+    }
+
     /* FIXME - must open files to determine if they are non-raw */
+    vol->type = VIR_STORAGE_VOL_NETWORK;
     vol->target.format = VIR_STORAGE_FILE_RAW;
     vol->capacity = vol->allocation = st->st_size;
 

tests/storagevolxml2xmlin/vol-gluster-dir.xml

+<volume type='netdir'>
+  <name>dir</name>
+  <key>vol/dir</key>
+  <source>
+  </source>
+  <capacity unit='bytes'>0</capacity>
+  <allocation unit='bytes'>0</allocation>
+  <target>
+    <format type='dir'/>
+    <path>gluster://example.com/vol/dir</path>
+  </target>
+</volume>

tests/storagevolxml2xmlout/vol-gluster-dir.xml

+<volume type='netdir'>
+  <name>dir</name>
+  <key>vol/dir</key>
+  <source>
+  </source>
+  <capacity unit='bytes'>0</capacity>
+  <allocation unit='bytes'>0</allocation>
+  <target>
+    <path>gluster://example.com/vol/dir</path>
+    <format type='dir'/>
+    <permissions>
+      <mode>0600</mode>
+      <owner>4294967295</owner>
+      <group>4294967295</group>
+    </permissions>
+  </target>
+</volume>

tests/storagevolxml2xmltest.c

@@ -121,6 +121,7 @@ mymain(void)
     DO_TEST("pool-logical", "vol-logical");
     DO_TEST("pool-logical", "vol-logical-backing");
     DO_TEST("pool-sheepdog", "vol-sheepdog");
+    DO_TEST("pool-gluster", "vol-gluster-dir");
 
     return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE;
 }