--- source3/modules/vfs_samfs.c	2010-07-07 10:22:33.756895700 -0700
+++ source3/modules/vfs_samfs.c	2010-07-07 07:13:55.603441200 -0700
@@ -0,0 +1,172 @@
+/*
+ * Support for offline files with Sun SAM-QFS
+ *
+ * Copyright (C) Dirk Nitschke, 2009
+ *
+ * Modified by Jiri Sasek, 2010
+ * To conform the samba-vfs api
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "includes.h"
+/*
+ * Include files for Sun SAM-QFS
+ *
+ */
+#include "sam-stat.h"
+#include "sam-lib.h"
+
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_VFS
+
+#define SAMFS_MODULE_NAME "samfs"
+
+NTSTATUS vfs_samfs_init(void);
+
+/*
+ * samfs_is_offline()
+ * check if the local file is offline in the sense of SAM-QFS
+ *
+ * A segmented file is offline if the file's index inode is
+ * offline or at least one of it's segments is offline.
+ *
+ * See sam_stat(3) and sam_segment_stat(3) for details.
+ *
+ * If something goes wrong we assume that the file is offline.
+ */
+static bool samfs_is_offline(struct vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf)
+{
+	struct sam_stat file_info;
+	struct sam_stat *seg_info_ptr;
+	bool offline;
+	int number_of_segments;
+	int result;
+	int i;
+
+	offline = false;
+	if (ISDOT(path) || ISDOTDOT(path)) {
+		return false;
+	}
+
+	/*
+	 * Initialize file_info to be all zero bits
+	 */
+	memset((void *)&file_info, 0, sizeof(struct sam_stat));
+
+	/*
+	 * Stat the file using the regular sam_stat function
+	 */
+	result = sam_stat(path, &file_info, sizeof(struct sam_stat));
+
+	if (result != 0) {
+		DEBUG(10,("samfs_is_offline: cannot sam_stat %s, %s\nAssuming file is offline.\n", \
+				path, strerror(errno)));
+		return true;
+	}
+
+	/*
+	 * Check if file is offline
+	 */
+	if (SS_ISOFFLINE(file_info.attr)) {
+		DEBUG(10,("samfs_is_offline: file %s is offline.\n", path));
+		return true;
+	}
+
+	/*
+	 * Check for segmented file
+	 */
+	if (SS_ISSEGMENT_F(file_info.attr)) {
+		number_of_segments = NUM_SEGS(&file_info);
+		seg_info_ptr = (struct sam_stat *)malloc(number_of_segments *
+						sizeof(struct sam_stat));
+		if (seg_info_ptr != NULL) {
+			/*
+			 * Initialize seg_info_ptr to be all zero bits
+			 */
+			memset((void *)seg_info_ptr, 0, number_of_segments *
+					sizeof(struct sam_stat));
+			/*
+			 * Stat all segments
+			 */
+			result = sam_segment_stat(path, seg_info_ptr,
+					number_of_segments * sizeof(struct sam_stat));
+			if (result != 0) {
+				DEBUG(10,("samfs_is_offline: cannot sam_segment_stat %s, %s\nAssuming file is offline.\n", \
+						path, strerror(errno)));
+				offline = true;
+			}
+			/*
+			 * Loop over segments until we have checked all segments
+			 * or found one which is offline.
+			 */
+			i = 0;
+			while (!offline && (i < number_of_segments)) {
+				if (SS_ISOFFLINE(seg_info_ptr[i].attr)) {
+					DEBUG(10,("samfs_is_offline: file %s has offline segment %d\n", \
+							path, i+1));
+					offline = true;
+				}
+				i++;
+			}
+			SAFE_FREE(seg_info_ptr);
+		} else {
+			DEBUG(10,("samfs_is_offline: cannot malloc for segment stat info %s\nAssuming file is offline.\n", \
+					path));
+			offline = true;
+                }
+	
+	}
+	return offline;
+}
+
+/*
+ * release a file-command to SAM-stagger
+ */
+extern int sam_release(const char *path, const char *command);
+
+/*
+ * samfs_set_offline()
+ *
+ * Release the local file in the sense of SAM-QFS.
+ * See sam_release(3) for details.
+ *
+ */
+static int samfs_set_offline(struct vfs_handle_struct *handle, const char *path)
+{
+	int result;
+
+	result = sam_release(path, "i");
+	if (result != 0) {
+		DEBUG(10,("samfs_set_offline: sam_release %s returned %s\n", \
+				path, strerror(errno)));
+		return -1;
+	}
+	return 0;
+}
+
+/* VFS operations structure */
+
+static struct vfs_fn_pointers samfs_fns = {
+	.is_offline = samfs_is_offline,
+	.set_offline = samfs_set_offline
+};
+
+NTSTATUS vfs_samfs_init(void);
+NTSTATUS vfs_samfs_init(void)
+{
+	return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, SAMFS_MODULE_NAME,
+				&samfs_fns);
+}