From 83ebf2b6b282926930dc2c5dee3b5f18447d6e81 Mon Sep 17 00:00:00 2001
From: Jeremy Allison <jra@samba.org>
Date: Thu, 6 Sep 2001 22:43:21 +0000
Subject: Fix the 62bit locking onto 32 bit NFS mounts problem generically for
 HPUX. Don. please check this out. Jeremy. (This used to be commit
 ce9f95996498f7795aaef069e1443ea1c7d524b3)

---
 source3/smbd/reply.c | 32 ++++++++++++++++++++++++++++++++
 1 file changed, 32 insertions(+)

(limited to 'source3/smbd')

diff --git a/source3/smbd/reply.c b/source3/smbd/reply.c
index 2af1f62356..26bd0b4714 100644
--- a/source3/smbd/reply.c
+++ b/source3/smbd/reply.c
@@ -4041,6 +4041,38 @@ SMB_BIG_UINT get_lock_count( char *data, int data_offset, BOOL large_file_format
   return count;
 }
 
+/****************************************************************************
+ Pathetically try and map a 64 bit lock offset into 31 bits. I hate Windows :-).
+****************************************************************************/
+
+static uint32 map_lock_offset(uint32 high, uint32 low)
+{
+	unsigned int i;
+	uint32 mask = 0;
+	uint32 highcopy = high;
+ 
+	/*
+	 * Try and find out how many significant bits there are in high.
+	 */
+ 
+	for(i = 0; highcopy; i++)
+		highcopy >>= 1;
+ 
+	/*
+	 * We use 31 bits not 32 here as POSIX
+	 * lock offsets may not be negative.
+	 */
+ 
+	mask = (~0) << (31 - i);
+ 
+	if(low & mask)
+		return 0; /* Fail. */
+ 
+	high <<= (31 - i);
+ 
+	return (high|low);
+}
+
 /****************************************************************************
  Get a lock offset, dealing with large offset requests.
 ****************************************************************************/
-- 
cgit