From 0ecb606cb6cf65de1d9fc8a919bceb4be476c602 Mon Sep 17 00:00:00 2001
From: Jakub Jelinek <jakub@redhat.com>
Date: Thu, 12 Jul 2007 18:26:36 +0000
Subject: 2.5-18.1

---
 nscd/hstcache.c | 58 ++++++++++++++++++++++++++++++++++++++++-----------------
 1 file changed, 41 insertions(+), 17 deletions(-)

(limited to 'nscd/hstcache.c')

diff --git a/nscd/hstcache.c b/nscd/hstcache.c
index 99d2998..e27ece5 100644
--- a/nscd/hstcache.c
+++ b/nscd/hstcache.c
@@ -1,22 +1,20 @@
 /* Cache handling for host lookup.
-   Copyright (C) 1998-2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 1998-2005, 2006 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
 
-   The GNU C Library is free software; you can redistribute it and/or
-   modify it under the terms of the GNU Lesser General Public
-   License as published by the Free Software Foundation; either
-   version 2.1 of the License, or (at your option) any later version.
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License version 2 as
+   published by the Free Software Foundation.
 
-   The GNU C Library is distributed in the hope that it will be useful,
+   This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
 
-   You should have received a copy of the GNU Lesser General Public
-   License along with the GNU C Library; if not, write to the Free
-   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-   02111-1307 USA.  */
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 #include <alloca.h>
 #include <assert.h>
@@ -38,6 +36,9 @@
 
 #include "nscd.h"
 #include "dbg_log.h"
+#ifdef HAVE_SENDFILE
+# include <kernel-features.h>
+#endif
 
 
 /* This is the standard reply in case the service is disabled.  */
@@ -115,7 +116,8 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req,
 	  written = total = sizeof (notfound);
 
 	  if (fd != -1)
-	    written = TEMP_FAILURE_RETRY (write (fd, &notfound, total));
+	    written = TEMP_FAILURE_RETRY (send (fd, &notfound, total,
+						MSG_NOSIGNAL));
 
 	  dataset = mempool_alloc (db, sizeof (struct dataset) + req->key_len);
 	  /* If we cannot permanently store the result, so be it.  */
@@ -327,7 +329,30 @@ cache_addhst (struct database_dyn *db, int fd, request_header *req,
 	     unnecessarily keep the receiver waiting.  */
 	  assert (fd != -1);
 
-	  written = TEMP_FAILURE_RETRY (write (fd, &dataset->resp, total));
+#ifdef HAVE_SENDFILE
+	  if (__builtin_expect (db->mmap_used, 1) && !alloca_used)
+	    {
+	      assert (db->wr_fd != -1);
+	      assert ((char *) &dataset->resp > (char *) db->data);
+	      assert ((char *) &dataset->resp - (char *) db->head
+		      + total
+		      <= (sizeof (struct database_pers_head)
+			  + db->head->module * sizeof (ref_t)
+			  + db->head->data_size));
+	      written = sendfileall (fd, db->wr_fd,
+				     (char *) &dataset->resp
+				     - (char *) db->head, total);
+# ifndef __ASSUME_SENDFILE
+	      if (written == -1 && errno == ENOSYS)
+		goto use_write;
+# endif
+	    }
+	  else
+# ifndef __ASSUME_SENDFILE
+	  use_write:
+# endif
+#endif
+	    written = writeall (fd, &dataset->resp, total);
 	}
 
       /* Add the record to the database.  But only if it has not been
@@ -453,11 +478,10 @@ addhstbyX (struct database_dyn *db, int fd, request_header *req,
     {
       char *old_buffer = buffer;
       errno = 0;
-#define INCR 1024
 
       if (__builtin_expect (buflen > 32768, 0))
 	{
-	  buflen += INCR;
+	  buflen *= 2;
 	  buffer = (char *) realloc (use_malloc ? buffer : NULL, buflen);
 	  if (buffer == NULL)
 	    {
@@ -478,7 +502,7 @@ addhstbyX (struct database_dyn *db, int fd, request_header *req,
       else
 	/* Allocate a new buffer on the stack.  If possible combine it
 	   with the previously allocated buffer.  */
-	buffer = (char *) extend_alloca (buffer, buflen, buflen + INCR);
+	buffer = (char *) extend_alloca (buffer, buflen, 2 * buflen);
     }
 
 #if 0
-- 
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