ntfs mkdir errno value

[Martin Natano]

The following patch addresses an issue found by landry. mkdir on an ntfs
mountpoint returns ENOENT, while the error should be EROFS. We don't
support write access on ntfs.

Ok?

natano


Index: ntfs/ntfs_subr.c
===================================================================
RCS file: /cvs/src/sys/ntfs/ntfs_subr.c,v
retrieving revision 1.45
diff -u -p -r1.45 ntfs_subr.c
--- ntfs/ntfs_subr.c    7 Feb 2016 09:31:14 -0000       1.45
+++ ntfs/ntfs_subr.c    31 May 2016 19:25:42 -0000
@@ -1055,14 +1055,20 @@ ntfs_ntlookupfile(struct ntfsmount *ntmp
                }
        } while (1);
 
-       /* perform full scan if no entry was found */
-       if (!fullscan && error == ENOENT) {
-               fullscan = 1;
-               cn = 0;         /* need zero, used by lookup_ctx */
+       if (error == ENOENT) {
+               /* perform full scan if no entry was found */
+               if (!fullscan) {
+                       fullscan = 1;
+                       cn = 0;         /* need zero, used by lookup_ctx */
 
-               DDPRINTF("ntfs_ntlookupfile: fullscan performed for: %.*s\n",
-                   (unsigned int)fnamelen, fname);
-               goto loop;
+                       DDPRINTF("ntfs_ntlookupfile: fullscan performed for: 
%.*s\n",
+                           (unsigned int)fnamelen, fname);
+                       goto loop;
+               }
+
+               if ((cnp->cn_flags & ISLASTCN) &&
+                   (cnp->cn_nameiop == CREATE || cnp->cn_nameiop == RENAME))
+                       error = EJUSTRETURN;
        }
 
        DPRINTF("finish\n");