pnfsmanager: log problems when creating upload directory

Currently, if there is a problem creating the upload directory
(for example, if the permissions for /upload is wrong) then a
CacheException is thrown, propagated to SRM, which converts this
to SRMInternalErrorException, which fails the request but without
logging the problem.

Since, in these cases, direct admin intervention is needed to fix
the problem, it makes sense that this is logged.

This patch will log situations that point to admin-related
mistakes or where admin intevention is likely needed.

Target: master
Require-notes: no
Require-book: no
Request: 2.11
Request: 2.10
Acked-by: Tigran Mkrtchyan
Patch: https://rb.dcache.org/r/7804/

modules/dcache-chimera/src/main/java/org/dcache/chimera/namespace/ChimeraNameSpaceProvider.java

@@ -143,7 +143,7 @@ public void setAtimeGap(long gap) {
     }
 
     private FsInode pathToInode(Subject subject, String path)
-        throws IOException, ChimeraFsException, CacheException
+        throws ChimeraFsException, CacheException
     {
         if (Subjects.isRoot(subject)) {
             return _fs.path2inode(path);
@@ -1036,7 +1036,7 @@ public void list(Subject subject, String path, Glob glob, Range<Integer> range,
     }
 
     private ExtendedInode mkdir(Subject subject, ExtendedInode parent, String name, int uid, int gid, int mode)
-            throws IOException, CacheException
+            throws ChimeraFsException, CacheException
     {
         if (!Subjects.isRoot(subject)) {
             FileAttributes attributesOfParent
@@ -1065,7 +1065,7 @@ private ExtendedInode mkdir(Subject subject, ExtendedInode parent, String name,
         return parent.mkdir(name, uid, gid, mode);
     }
 
-    private ExtendedInode installDirectory(Subject subject, FsPath path, int uid, int gid, int mode) throws IOException, CacheException
+    private ExtendedInode installDirectory(Subject subject, FsPath path, int uid, int gid, int mode) throws ChimeraFsException, CacheException
     {
         ExtendedInode inode;
         try {
@@ -1083,7 +1083,7 @@ private ExtendedInode installDirectory(Subject subject, FsPath path, int uid, in
         return inode;
     }
 
-    private ExtendedInode lookupDirectory(Subject subject, FsPath path) throws IOException, CacheException
+    private ExtendedInode lookupDirectory(Subject subject, FsPath path) throws ChimeraFsException, CacheException
     {
         try {
             ExtendedInode inode = new ExtendedInode(pathToInode(subject, path.toString()));
@@ -1177,9 +1177,11 @@ public FsPath createUploadPath(Subject subject, FsPath path, FsPath rootPath,
              */
             FsInode inodeOfUploadDir = installDirectory(Subjects.ROOT, uploadDirectory, 0, 0, 0711);
             if (inodeOfUploadDir.statCache().getUid() != 0) {
+                _log.error("Owner must be root: {}", uploadDirectory);
                 throw new CacheException("Owner must be root: " + uploadDirectory);
             }
             if ((inodeOfUploadDir.statCache().getMode() & UnixPermission.S_PERMS) != 0711) {
+                _log.error("File mode must be 0711: {}", uploadDirectory);
                 throw new CacheException("File mode must be 0711: " + uploadDirectory);
             }
 
@@ -1208,7 +1210,8 @@ public FsPath createUploadPath(Subject subject, FsPath path, FsPath rootPath,
             _fs.mkdir(inodeOfUploadDir, uuid.toString(), uid, gid, mode, tags);
 
             return new FsPath(uploadDirectory, uuid.toString(), path.getName());
-        } catch (IOException e) {
+        } catch (ChimeraFsException e) {
+            _log.error("Problem with database: {}", e.getMessage());
             throw new CacheException(CacheException.UNEXPECTED_SYSTEM_EXCEPTION,
                                      e.getMessage());
         }