Make solaris use sendfilev

sendfilev is a richer API which allows us to
do non blocking TCP on solaris. The normal
sendfile API seems to have some issue with
non blocking sockets and the return value of
sendfile.

3 files changed, 31 insertions, 2 deletions

diff --git a/erts/configure.in b/erts/configure.in
index 548e4cc9d5..e937184f62 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -1697,7 +1697,9 @@ case $host_os in
 		AC_CHECK_FUNCS([sendfile])
 		;;
     solaris*)
-		AC_SEARCH_LIBS(sendfile, sendfile, AC_DEFINE(HAVE_SENDFILE, 1))
+		AC_SEARCH_LIBS(sendfilev, sendfile,
+			AC_DEFINE([HAVE_SENDFILEV],[1],
+		           [Define to 1 if you have the `sendfilev' function.]))
 		;;
     win32)
 		LIBS="$LIBS -lmswsock"
diff --git a/erts/emulator/drivers/common/erl_efile.h b/erts/emulator/drivers/common/erl_efile.h
index 349ab0e17b..ed8910a8b8 100644
--- a/erts/emulator/drivers/common/erl_efile.h
+++ b/erts/emulator/drivers/common/erl_efile.h
@@ -67,6 +67,11 @@
 #define FILENAMES_16BIT 1
 #endif
 
+// We use sendfilev if it exist on solaris
+#if !defined(HAVE_SENDFILE) && defined(HAVE_SENDFILEV)
+#define HAVE_SENDFILE
+#endif
+
 /*
  * An handle to an open directory.  To be cast to the correct type
  * in the system-dependent directory functions.
diff --git a/erts/emulator/drivers/unix/unix_efile.c b/erts/emulator/drivers/unix/unix_efile.c
index 72911641d3..2b68334ad7 100644
--- a/erts/emulator/drivers/unix/unix_efile.c
+++ b/erts/emulator/drivers/unix/unix_efile.c
@@ -1488,7 +1488,7 @@ efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd,
 	       off_t *offset, Uint64 *nbytes, struct t_sendfile_hdtl* hdtl)
 {
     Uint64 written = 0;
-#if defined(__linux__) || (defined(__sun) && defined(__SVR4))
+#if defined(__linux__)
     ssize_t retval;
     do {
       // check if *nbytes is 0 or greater than the largest size_t
@@ -1503,6 +1503,28 @@ efile_sendfile(Efile_error* errInfo, int in_fd, int out_fd,
     } while (retval != -1 && retval == SENDFILE_CHUNK_SIZE);
     *nbytes = written;
     return check_error(retval == -1 ? -1 : 0, errInfo);
+#elif defined(__sun) && defined(__SVR4) && defined(HAVE_SENDFILEV)
+    ssize_t retval;
+    size_t len;
+    sendfilevec_t fdrec;
+    fdrec.sfv_fd = in_fd;
+    fdrec.sfv_flag = SFV_NOWAIT;
+    do {
+      fdrec.sfv_off = *offset;
+      len = 0;
+      if (*nbytes == 0 || *nbytes > SENDFILE_CHUNK_SIZE)
+	fdrec.sfv_len = SENDFILE_CHUNK_SIZE;
+      else
+	fdrec.sfv_len = *nbytes;
+      retval = sendfilev(out_fd, &fdrec, 1, &len);
+      if (retval != -1 || errno == EAGAIN || errno == EINTR) {
+        *offset += len;
+	*nbytes -= len;
+	written += len;
+      }
+    } while (len == SENDFILE_CHUNK_SIZE);
+    *nbytes = written;
+    return check_error(retval == -1 ? -1 : 0, errInfo);
 #elif defined(DARWIN)
     int retval;
     off_t len;