1 files changed, 32 insertions, 0 deletions

diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 988fddb72025..abd2cc9515c9 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -908,6 +908,33 @@ cifs_mand_lock(const unsigned int xid, struct cifsFileInfo *cfile, __u64 offset,
 }
 
 static int
+cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
+                       const unsigned char *searchName, char **symlinkinfo,
+                       const struct nls_table *nls_codepage)
+{
+#ifdef CONFIG_CIFS_DFS_UPCALL
+        int rc;
+        unsigned int num_referrals = 0;
+        struct dfs_info3_param *referrals = NULL;
+
+        rc = get_dfs_path(xid, tcon->ses, searchName, nls_codepage,
+                          &num_referrals, &referrals, 0);
+
+        if (!rc && num_referrals > 0) {
+                *symlinkinfo = kstrndup(referrals->node_name,
+                                        strlen(referrals->node_name),
+                                        GFP_KERNEL);
+                if (!*symlinkinfo)
+                        rc = -ENOMEM;
+                free_dfs_info_array(referrals, num_referrals);
+        }
+        return rc;
+#else /* No DFS support */
+        return -EREMOTE;
+#endif
+}
+
+static int
 cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
                    const char *full_path, char **target_path,
                    struct cifs_sb_info *cifs_sb)
@@ -922,6 +949,11 @@ cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
         if (cap_unix(tcon->ses)) {
                 rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
                                              cifs_sb->local_nls);
+                if (rc == -EREMOTE)
+                        rc = cifs_unix_dfs_readlink(xid, tcon, full_path,
+                                                    target_path,
+                                                    cifs_sb->local_nls);
+
                 goto out;
         }