http://linux-ntfs.bkbits.net/ntfs-2.6
aia21@cantab.net|ChangeSet|20040521082503|22617 aia21

# This is a BitKeeper generated diff -Nru style patch.
#
# ChangeSet
#   2004/05/17 22:45:04+01:00 aia21@cantab.net 
#   NTFS: Add a new address space operations struct, ntfs_mst_aops, for mst
#         protected attributes.  This is because the default ntfs_aops do not
#         make sense with mst protected data and were they to write anything to
#         such an attribute they would cause data corruption so we provide
#         ntfs_mst_aops which does not have any write related operations set.
# 
# fs/ntfs/ntfs.h
#   2004/05/17 22:42:28+01:00 aia21@cantab.net +1 -0
#   Add a new address space operations struct, ntfs_mst_aops, for mst
#   protected attributes.
# 
# fs/ntfs/inode.c
#   2004/05/17 22:42:15+01:00 aia21@cantab.net +5 -2
#   Add a new address space operations struct, ntfs_mst_aops, for mst
#   protected attributes.
# 
# fs/ntfs/aops.c
#   2004/05/17 22:41:44+01:00 aia21@cantab.net +9 -0
#   Add a new address space operations struct, ntfs_mst_aops, for mst
#   protected attributes.
# 
# fs/ntfs/Makefile
#   2004/05/17 22:41:38+01:00 aia21@cantab.net +1 -1
#   Update
# 
# fs/ntfs/ChangeLog
#   2004/05/17 22:41:31+01:00 aia21@cantab.net +8 -0
#   Update
# 
diff -Nru a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
--- a/fs/ntfs/ChangeLog	Fri May 21 19:02:40 2004
+++ b/fs/ntfs/ChangeLog	Fri May 21 19:02:40 2004
@@ -25,6 +25,14 @@
 	  sufficient for synchronisation here. We then just need to make sure
 	  ntfs_readpage/writepage/truncate interoperate properly with us.
 
+2.1.12 - WIP.
+
+	- Add a new address space operations struct, ntfs_mst_aops, for mst
+	  protected attributes.  This is because the default ntfs_aops do not
+	  make sense with mst protected data and were they to write anything to
+	  such an attribute they would cause data corruption so we provide
+	  ntfs_mst_aops which does not have any write related operations set.
+
 2.1.11 - Driver internal cleanups.
 
 	- Only build logfile.o if building the driver with read-write support.
diff -Nru a/fs/ntfs/Makefile b/fs/ntfs/Makefile
--- a/fs/ntfs/Makefile	Fri May 21 19:02:40 2004
+++ b/fs/ntfs/Makefile	Fri May 21 19:02:40 2004
@@ -5,7 +5,7 @@
 ntfs-objs := aops.o attrib.o compress.o debug.o dir.o file.o inode.o mft.o \
 	     mst.o namei.o super.o sysctl.o unistr.o upcase.o
 
-EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.11\"
+EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.12-WIP\"
 
 ifeq ($(CONFIG_NTFS_DEBUG),y)
 EXTRA_CFLAGS += -DDEBUG
diff -Nru a/fs/ntfs/aops.c b/fs/ntfs/aops.c
--- a/fs/ntfs/aops.c	Fri May 21 19:02:40 2004
+++ b/fs/ntfs/aops.c	Fri May 21 19:02:40 2004
@@ -1788,3 +1788,12 @@
 #endif
 };
 
+/**
+ * ntfs_mst_aops - general address space operations for mst protecteed inodes
+ *		   and attributes
+ */
+struct address_space_operations ntfs_mst_aops = {
+	.readpage	= ntfs_readpage,	/* Fill page with data. */
+	.sync_page	= block_sync_page,	/* Currently, just unplugs the
+						   disk request queue. */
+};
diff -Nru a/fs/ntfs/inode.c b/fs/ntfs/inode.c
--- a/fs/ntfs/inode.c	Fri May 21 19:02:40 2004
+++ b/fs/ntfs/inode.c	Fri May 21 19:02:40 2004
@@ -872,7 +872,7 @@
 		/* Setup the operations for this inode. */
 		vi->i_op = &ntfs_dir_inode_ops;
 		vi->i_fop = &ntfs_dir_ops;
-		vi->i_mapping->a_ops = &ntfs_aops;
+		vi->i_mapping->a_ops = &ntfs_mst_aops;
 	} else {
 		/* It is a file. */
 		reinit_attr_search_ctx(ctx);
@@ -1249,7 +1249,10 @@
 	/* Setup the operations for this attribute inode. */
 	vi->i_op = NULL;
 	vi->i_fop = NULL;
-	vi->i_mapping->a_ops = &ntfs_aops;
+	if (NInoMstProtected(ni))
+		vi->i_mapping->a_ops = &ntfs_mst_aops;
+	else
+		vi->i_mapping->a_ops = &ntfs_aops;
 
 	if (!NInoCompressed(ni))
 		vi->i_blocks = ni->allocated_size >> 9;
diff -Nru a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h
--- a/fs/ntfs/ntfs.h	Fri May 21 19:02:40 2004
+++ b/fs/ntfs/ntfs.h	Fri May 21 19:02:40 2004
@@ -62,6 +62,7 @@
 /* The various operations structs defined throughout the driver files. */
 extern struct super_operations ntfs_sops;
 extern struct address_space_operations ntfs_aops;
+extern struct address_space_operations ntfs_mst_aops;
 extern struct address_space_operations ntfs_mft_aops;
 
 extern struct  file_operations ntfs_file_ops;