# SamFS support for Samba 3.0.20
# -----------------------------------------------------------
# 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-3.0.20-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!
#
# 18.10.2005 - Tobi Oetiker <tobi@oetiker.ch>
#
# DISCLAIMER: After applying this patch, your robot may eat all the tapes,
#  your partner may leave you for a less nerdy person and your faithful dog
#  could die. Don't come whining to me! You have been warned and thus
#  disclaimed!
 

diff -u -r samba-3.0.20/source/include/smb.h new/source/include/smb.h
--- samba-3.0.20/source/include/smb.h	2005-07-28 15:19:50.000000000 +0200
+++ new/source/include/smb.h	2005-10-18 23:15:37.880371000 +0200
@@ -90,6 +90,7 @@
 #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 -u -r samba-3.0.20/source/include/smb_macros.h new/source/include/smb_macros.h
--- samba-3.0.20/source/include/smb_macros.h	2005-07-28 15:19:50.000000000 +0200
+++ new/source/include/smb_macros.h	2005-10-18 23:15:37.880375000 +0200
@@ -133,6 +133,8 @@
 #define MAP_HIDDEN(conn)   ((conn) && lp_map_hidden((conn)->service))
 #define MAP_SYSTEM(conn)   ((conn) && lp_map_system((conn)->service))
 #define MAP_ARCHIVE(conn)   ((conn) && lp_map_archive((conn)->service))
+#define MAP_OFFLINE(conn)   ((conn) && lp_map_offline((conn)->service))
+#define MAP_OFFLINESAMFS(conn)   ((conn) && lp_map_offlinesamfs((conn)->service))
 #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 -u -r samba-3.0.20/source/lib/util.c new/source/lib/util.c
--- samba-3.0.20/source/lib/util.c	2005-08-19 19:16:27.000000000 +0200
+++ new/source/lib/util.c	2005-10-18 23:15:37.880367000 +0200
@@ -438,6 +438,7 @@
 	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(attrstr);
 }
diff -u -r samba-3.0.20/source/param/loadparm.c new/source/param/loadparm.c
--- samba-3.0.20/source/param/loadparm.c	2005-07-28 15:19:44.000000000 +0200
+++ new/source/param/loadparm.c	2005-10-18 23:15:37.810444000 +0200
@@ -398,6 +398,8 @@
 	BOOL bMap_system;
 	BOOL bMap_hidden;
 	BOOL bMap_archive;
+	BOOL bMap_offline;
+	BOOL bMap_offlinesamfs;
 	BOOL bStoreDosAttributes;
 	BOOL bLocking;
 	int iStrictLocking;
@@ -531,6 +533,8 @@
 	False,			/* bMap_system */
 	False,			/* bMap_hidden */
 	True,			/* bMap_archive */
+	False,			/* bMap_offline */
+	False,			/* bMap_offlinesamfs */
 	False,			/* bStoreDosAttributes */
 	True,			/* bLocking */
 	True,			/* iStrictLocking */
@@ -1050,6 +1054,8 @@
 	{"map system", P_BOOL, P_LOCAL, &sDefault.bMap_system, NULL, NULL, FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL}, 
 	{"map hidden", P_BOOL, P_LOCAL, &sDefault.bMap_hidden, NULL, NULL, FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL}, 
 	{"map archive", P_BOOL, P_LOCAL, &sDefault.bMap_archive, NULL, NULL, FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL}, 
+	{"map offline", P_BOOL, P_LOCAL, &sDefault.bMap_offline, NULL, NULL, FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL}, 
+	{"map offlinesamfs", P_BOOL, P_LOCAL, &sDefault.bMap_offlinesamfs, NULL, NULL, FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL}, 
 	{"mangled names", P_BOOL, P_LOCAL, &sDefault.bMangledNames, NULL, NULL, FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL}, 
 	{"mangled map", P_STRING, P_LOCAL, &sDefault.szMangledMap, NULL, NULL, FLAG_ADVANCED | FLAG_SHARE | FLAG_GLOBAL | FLAG_DEPRECATED }, 
 	{"max stat cache size", P_INTEGER, P_GLOBAL, &Globals.iMaxStatCacheSize, NULL, NULL, FLAG_ADVANCED}, 
@@ -1948,6 +1954,8 @@
 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_locking, bLocking)
 FN_LOCAL_INTEGER(lp_strict_locking, iStrictLocking)
diff -u -r samba-3.0.20/source/smbd/dosmode.c new/source/smbd/dosmode.c
--- samba-3.0.20/source/smbd/dosmode.c	2005-07-28 15:19:43.000000000 +0200
+++ new/source/smbd/dosmode.c	2005-10-18 23:15:37.810418000 +0200
@@ -146,7 +146,20 @@
 	
 	if (MAP_HIDDEN(conn) && ((sbuf->st_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 <oetiker@ee.ethz.ch> */
+	 
+	if (MAP_OFFLINESAMFS(conn) && (sbuf->st_size > sbuf->st_blocks * 512 ))
+	        result |= aOFFLINE;   
+	  
 	if (S_ISDIR(sbuf->st_mode))
 		result = aDIR | (result & aRONLY);
 
@@ -166,6 +179,7 @@
 	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;