# SamFS support for Samba 3.5.8
# -----------------------------------------------------------
# The home of this patch is 
# http://tobi.oetiker.ch/solaris/sambasamfs
#
# I have put together a patch that teaches samba about SAMFS offline files.
# Windows Explorer will henceforth refrain from opening these files while
# you browse and thus stop the constant freezing. Instead it will grace the
# offline files with nice little black watch icons.
#
# The patch is in unified context diff format. After unpacking samba source,
# run
# 
#  patch -p0 <samba-3.5.8-samfs-patch.txt
#
# (Best is to use GNU patch for this)
#
# The explorer will still freeze once you try to open/copy/move the offline
# file, just like before. It will wait until the file is online, and then
# continue in its merry ways.
#
# This patch is in the public-domain ... it is based on a patch
# by Don McCall written for samba 2.2.
#
# The patch adds two new config options. The first is
#
#  map offline = yes
#
# it marks ALL files in a share as offline. The second
# call is more SAM-FS specific:
#
#  map offlinesamfs = yes
# 
# it will cause files to be marked offline if blocks * 512 < size which
# seems to be a good indication for SAMFS offline status. The advantage of
# this approach is, that we do not have to link against the samfs library
# for the sam stat call.
#
# If you have fun with this patch or improve it, let me know!
#
# 2008-11-26 - Tobi Oetiker <tobi@oetiker.ch>
#
# DISCLAIMER: After applying this patch, your robot might eat all the tapes,
#  your partner could leave you for a less nerdy person and your faithful dog
#  will probably die. Don't come whining to me! You have been warned of this
#  and any other calamity that might result from using the patch. Consider
#  yourself disclaimed!

diff -ru samba-3.5.8.orig/source3/include/smb.h samba-3.5.8/source3/include/smb.h
--- samba-3.5.8.orig/source3/include/smb.h	Sun Mar  6 13:48:05 2011
+++ samba-3.5.8/source3/include/smb.h	Tue Apr 19 18:18:43 2011
@@ -93,6 +93,7 @@
 #define aVOLID (1L<<3)		/* 0x08 */
 #define aDIR (1L<<4)		/* 0x10 */
 #define aARCH (1L<<5)		/* 0x20 */
+#define aOFFLINE (1L<<12)      /* 0x1000 */
 
 /* deny modes */
 #define DENY_DOS 0
diff -ru samba-3.5.8.orig/source3/include/smb_macros.h samba-3.5.8/source3/include/smb_macros.h
--- samba-3.5.8.orig/source3/include/smb_macros.h	Sun Mar  6 13:48:05 2011
+++ samba-3.5.8/source3/include/smb_macros.h	Tue Apr 19 18:19:35 2011
@@ -79,6 +79,8 @@
 #define MAP_HIDDEN(conn)   ((conn) && lp_map_hidden(SNUM(conn)))
 #define MAP_SYSTEM(conn)   ((conn) && lp_map_system(SNUM(conn)))
 #define MAP_ARCHIVE(conn)   ((conn) && lp_map_archive(SNUM(conn)))
+#define MAP_OFFLINE(conn)   ((conn) && lp_map_offline(SNUM(conn)))
+#define MAP_OFFLINESAMFS(conn)   ((conn) && lp_map_offlinesamfs(SNUM(conn)))
 #define IS_HIDDEN_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->hide_list,(conn)->case_sensitive))
 #define IS_VETO_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->veto_list,(conn)->case_sensitive))
 #define IS_VETO_OPLOCK_PATH(conn,path)  ((conn) && is_in_path((path),(conn)->veto_oplock_list,(conn)->case_sensitive))
diff -ru samba-3.5.8.orig/source3/lib/util.c samba-3.5.8/source3/lib/util.c
--- samba-3.5.8.orig/source3/lib/util.c	Sun Mar  6 13:48:05 2011
+++ samba-3.5.8/source3/lib/util.c	Tue Apr 19 18:20:15 2011
@@ -601,6 +601,7 @@
 	if (mode & aHIDDEN) fstrcat(attrstr,"H");
 	if (mode & aSYSTEM) fstrcat(attrstr,"S");
 	if (mode & aRONLY) fstrcat(attrstr,"R");	  
+        if (mode & aOFFLINE) fstrcat(attrstr,"O");
 
 	return talloc_strdup(talloc_tos(), attrstr);
 }
diff -ru samba-3.5.8.orig/source3/param/loadparm.c samba-3.5.8/source3/param/loadparm.c
--- samba-3.5.8.orig/source3/param/loadparm.c	Sun Mar  6 13:48:05 2011
+++ samba-3.5.8/source3/param/loadparm.c	Tue Apr 19 18:22:19 2011
@@ -453,6 +453,8 @@
 	bool bMap_system;
 	bool bMap_hidden;
 	bool bMap_archive;
+        bool bMap_offline;
+        bool bMap_offlinesamfs;
 	bool bStoreDosAttributes;
 	bool bDmapiSupport;
 	bool bLocking;
@@ -597,6 +599,8 @@
 	False,			/* bMap_system */
 	False,			/* bMap_hidden */
 	True,			/* bMap_archive */
+        False,                  /* bMap_offline */
+        False,                  /* bMap_offlinesamfs */
 	False,			/* bStoreDosAttributes */
 	False,			/* bDmapiSupport */
 	True,			/* bLocking */
@@ -3052,6 +3056,22 @@
 		.enum_list	= NULL,
 		.flags		= FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL,
 	},
+        {       .label          = "map offline",
+                .type           = P_BOOL,
+                .p_class        = P_LOCAL,
+                .ptr            = &sDefault.bMap_offline,
+                .special        = NULL,
+                .enum_list      = NULL,
+                .flags          = FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL,
+        },
+        {       .label          = "map offlinesamfs",
+                .type           = P_BOOL,
+                .p_class        = P_LOCAL,
+                .ptr            = &sDefault.bMap_offlinesamfs,
+                .special        = NULL,
+                .enum_list      = NULL,
+                .flags          = FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL,
+        },
 	{
 		.label		= "map system",
 		.type		= P_BOOL,
@@ -5667,6 +5687,8 @@
 FN_LOCAL_BOOL(lp_print_ok, bPrint_ok)
 FN_LOCAL_BOOL(lp_map_hidden, bMap_hidden)
 FN_LOCAL_BOOL(lp_map_archive, bMap_archive)
+FN_LOCAL_BOOL(lp_map_offline, bMap_offline)
+FN_LOCAL_BOOL(lp_map_offlinesamfs, bMap_offlinesamfs)
 FN_LOCAL_BOOL(lp_store_dos_attributes, bStoreDosAttributes)
 FN_LOCAL_BOOL(lp_dmapi_support, bDmapiSupport)
 FN_LOCAL_PARM_BOOL(lp_locking, bLocking)
diff -ru samba-3.5.8.orig/source3/smbd/dosmode.c samba-3.5.8/source3/smbd/dosmode.c
--- samba-3.5.8.orig/source3/smbd/dosmode.c	Sun Mar  6 13:48:05 2011
+++ samba-3.5.8/source3/smbd/dosmode.c	Tue Apr 19 18:23:39 2011
@@ -198,6 +198,20 @@
 	if (MAP_HIDDEN(conn) && ((smb_fname->st.st_ex_mode & S_IXOTH) != 0))
 		result |= aHIDDEN;   
 
+        if (MAP_OFFLINE(conn))
+                result |= aOFFLINE;
+ 
+        /* in samfs, the st_blocks member shows the number of blocks in the disk cache
+         * I am using 512 and not st_blksize since samfs sets the blksize to the prefered
+         * blksize which is more like 64k ... but the blocks on disk seem to be 512 bytes
+         * this will only be relevant if you configure samfs to keep a file partially
+         * on disk ... otherwise offline files have st_blocks == 0 anyway.
+         * Tobi Oetiker <tobi@oetiker.ch> */
+ 
+       if (MAP_OFFLINESAMFS(conn) && (smb_fname->st.st_ex_blocks == 0 ))
+                result |= aOFFLINE;
+
+
 	if (S_ISDIR(smb_fname->st.st_ex_mode))
 		result = aDIR | (result & aRONLY);
 
@@ -211,6 +225,7 @@
 	if (result & aSYSTEM) DEBUG(8, ("s"));
 	if (result & aDIR   ) DEBUG(8, ("d"));
 	if (result & aARCH  ) DEBUG(8, ("a"));
+        if (result & aOFFLINE  ) DEBUG(8, ("o"));
 
 	DEBUG(8,("\n"));
 	return result;