From: Igor Mikhailov (imichail) <imichail@cisco.com>
Date: Mon, 5 Feb 2018 20:09:36 +0000 (-0800)
Subject: Provide page-aligned length to ftruncate.
X-Git-Tag: v18.01.1~1
X-Git-Url: https://gerrit.fd.io/r/gitweb?a=commitdiff_plain;h=67d782514941a68ea47934379e2d96050c9b2001;p=vpp.git

Provide page-aligned length to ftruncate.

For some files such as hugepages files, ftruncate() fails with the error
"Invalid argument" if the 'length' parameter is not on a page boundary.

Change-Id: I42a9cde98707da15e3c5d1653046e2277fc7a424
Signed-off-by: Igor Mikhailov (imichail) <imichail@cisco.com>
(cherry picked from commit 7d25415a9384d4c3d786d0c1ae5c0fcff3112acd)
---

diff --git a/src/vppinfra/linux/mem.c b/src/vppinfra/linux/mem.c
index 2d8f593d2b6..0bc08787baa 100644
--- a/src/vppinfra/linux/mem.c
+++ b/src/vppinfra/linux/mem.c
@@ -167,7 +167,7 @@ clib_mem_vm_ext_alloc (clib_mem_vm_alloc_t * a)
     }
 
   if (fd != -1)
-    if ((ftruncate (fd, a->size)) == -1)
+    if ((ftruncate (fd, n_pages * (1 << log2_page_size))) == -1)
       {
 	err = clib_error_return_unix (0, "ftruncate");
 	goto error;