http://bugs.proftpd.org/show_bug.cgi?id=4162

--- a/modules/mod_xfer.c	2015-02-03 20:54:22.857151750 -0800
+++ b/modules/mod_xfer.c	2015-02-03 21:10:36.020000070 -0800
@@ -31,6 +31,9 @@
 
 #include "conf.h"
 #include "privs.h"
+#ifdef _SOLARIS_DTRACE
+#include "ftp_provider_impl.h"
+#endif
 
 #ifdef HAVE_SYS_SENDFILE_H
 # include <sys/sendfile.h>
@@ -1784,7 +1787,24 @@
      * be doing short writes, and we ideally should be more resilient/graceful
      * in the face of such things.
      */
+#ifdef _SOLARIS_DTRACE
+    if (ftp_transfer_start_enabled()) {
+      ftpproto_t proto;
+      FTP_TRANSFER_PROTO(&proto, stor_fh, 0);
+      ftp_transfer_start(&proto);
+    }
+#endif
+
     res = pr_fsio_write(stor_fh, lbuf, len);
+
+#ifdef _SOLARIS_DTRACE
+    if (ftp_transfer_done_enabled() && res == len) {
+      ftpproto_t proto;
+      FTP_TRANSFER_PROTO(&proto, stor_fh, res);
+      ftp_transfer_done(&proto);
+    }
+#endif
+
     if (res != len) {
       int xerrno = EIO;
       cmd->error_code = errno;
@@ -2203,7 +2223,24 @@
     if (XFER_ABORTED)
       break;
 
+#ifdef _SOLARIS_DTRACE
+    if (ftp_transfer_start_enabled()) {
+      ftpproto_t proto;
+      FTP_TRANSFER_PROTO(&proto, retr_fh, 0);
+      ftp_transfer_start(&proto);
+    }
+#endif
+
     len = transmit_data(nbytes_sent, &curr_pos, lbuf, bufsz);
+
+#ifdef _SOLARIS_DTRACE
+    if (ftp_transfer_done_enabled() && len > 0) {
+      ftpproto_t proto;
+      FTP_TRANSFER_PROTO(&proto, retr_fh, len);
+      ftp_transfer_done(&proto);
+    }
+#endif
+
     if (len == 0)
       break;