Merge bk://linux.bkbits.net/linux-2.5 into cam.ac.uk:/home/aia21/tng

fs/Config.help

@@ -581,33 +581,36 @@ CONFIG_HPFS_FS
   say N.
 
 CONFIG_NTFS_FS
-  NTFS is the file system of Microsoft Windows NT. Say Y if you want
-  to get read access to files on NTFS partitions of your hard drive.
-  The Linux NTFS driver supports most of the mount options of the VFAT
-  driver, see <file:Documentation/filesystems/ntfs.txt>. Saying Y here
-  will give you read-only access to NTFS partitions.
+  NTFS is the file system of Microsoft Windows NT/2000/XP. For more
+  information see <file:Documentation/filesystems/ntfs.txt>. Saying Y
+  here would allow you to read from NTFS partitions.
 
-  This code is also available as a module ( = code which can be
+  This file system is also available as a module ( = code which can be
   inserted in and removed from the running kernel whenever you want).
   The module will be called ntfs.o. If you want to compile it as a
   module, say M here and read <file:Documentation/modules.txt>.
 
-CONFIG_NTFS_RW
-  If you say Y here, you will (maybe) be able to write to NTFS file
-  systems as well as read from them. The read-write support in NTFS
-  is far from being complete and is not well tested. If you say Y
-  here, back up your NTFS volume first, since it will probably get
-  damaged. Also, download the Linux-NTFS project distribution from
-  Sourceforge at <http://linux-ntfs.sf.net/> and always run the
-  included ntfsfix utility after writing to an NTFS partition from
-  Linux to fix some of the damage done by the driver. You should run
-  ntfsfix _after_ unmounting the partition in Linux but _before_
-  rebooting into Windows. When Windows next boots, chkdsk will be
-  run automatically to fix the remaining damage.
-  Please note that write support is limited to Windows NT4 and
-  earlier versions.
-
-  If unsure, say N.
+  If you are not using Windows NT/2000/XP in addition to Linux on your
+  computer it is safe to say N.
+
+CONFIG_NTFS_DEBUG
+  If you are experiencing any problems with the NTFS file system, say
+  Y here. This will result in additional consistency checks to be
+  performed by the driver as well as additional debugging messages to
+  be written to the system log. Note that debugging messages are
+  disabled by default. To enable them, supply the option debug_msgs=1
+  at the kernel command line when booting the kernel or as an option
+  to insmod when loading the ntfs module. Once the driver is active,
+  you can enable debugging messages by doing (as root):
+    echo 1 > /proc/sys/fs/ntfs-debug
+  Replacing the "1" with "0" would disable debug messages.
+
+  If you leave debugging messages disabled, this results in little
+  overhead, but enabling debug messages results in very significant
+  slowdown of the system.
+
+  When reporting bugs, please try to have available a full dump of
+  debugging messages while the misbehaviour was occurring.
 
 CONFIG_SYSV_FS
   SCO, Xenix and Coherent are commercial Unix systems for Intel

fs/Config.in

@@ -62,8 +62,9 @@ dep_mbool '  JFS statistics' CONFIG_JFS_STATISTICS $CONFIG_JFS_FS
 tristate 'Minix fs support' CONFIG_MINIX_FS
 
 tristate 'FreeVxFS file system support (VERITAS VxFS(TM) compatible)' CONFIG_VXFS_FS
+
 tristate 'NTFS file system support (read only)' CONFIG_NTFS_FS
-dep_mbool '  NTFS write support (DANGEROUS)' CONFIG_NTFS_RW $CONFIG_NTFS_FS $CONFIG_EXPERIMENTAL
+dep_mbool '  NTFS debugging support' CONFIG_NTFS_DEBUG $CONFIG_NTFS_FS
 
 tristate 'OS/2 HPFS file system support' CONFIG_HPFS_FS
 

fs/ntfs/Makefile

-# Rules for making the NTFS driver
+# Rules for making the NTFS TNG driver.
 
 O_TARGET := ntfs.o
 
-obj-y   := fs.o sysctl.o support.o util.o inode.o dir.o super.o attr.o unistr.o
+obj-y   := time.o unistr.o inode.o file.o mft.o super.o debug.o aops.o \
+		attrib.o dir.o namei.o mst.o upcase.o compress.o sysctl.o
+
 obj-m   := $(O_TARGET)
-# New version format started 3 February 2001.
-EXTRA_CFLAGS = -DNTFS_VERSION=\"1.1.21\" #-DDEBUG
+
+EXTRA_CFLAGS = -DNTFS_VERSION=\"TNG-0.0.9-WIP\"
+
+ifeq ($(CONFIG_NTFS_DEBUG),y)
+EXTRA_CFLAGS += -DDEBUG
+endif
 
 include $(TOPDIR)/Rules.make
 

fs/ntfs/attr.h

-/*
- * attr.h -  Header file for attr.c
- *
- * Copyright (C) 1997 Rgis Duchesne
- * Copyright (c) 2001 Anton Altaparmakov (AIA)
- */
-#include <linux/nls.h>
-
-ntfs_u8* ntfs_find_attr_in_mft_rec(ntfs_volume *vol, ntfs_u8 *m, __u32 type,
-			wchar_t *name, __u32 name_len, int ic, __u16 instance);
-
-int ntfs_extend_attr(ntfs_inode *ino, ntfs_attribute *attr, const __s64 len);
-
-int ntfs_resize_attr(ntfs_inode *ino, ntfs_attribute *attr, __s64 newsize);
-
-int ntfs_insert_attribute(ntfs_inode *ino, unsigned char* attrdata);
-
-int ntfs_read_compressed(ntfs_inode *ino, ntfs_attribute *attr, __s64 offset,
-			 ntfs_io *dest);
-
-int ntfs_write_compressed(ntfs_inode *ino, ntfs_attribute *attr, __s64 offset,
-			  ntfs_io *dest);
-
-int ntfs_create_attr(ntfs_inode *ino, int anum, char *aname, void *data,
-		     int dsize, ntfs_attribute **rattr);
-
-int ntfs_read_zero(ntfs_io *dest, int size);
-
-int ntfs_make_attr_nonresident(ntfs_inode *ino, ntfs_attribute *attr);
-
-int ntfs_attr_allnonresident(ntfs_inode *ino);
-
-int ntfs_new_attr(ntfs_inode *ino, int type, void *name, int namelen,
-		  void *value, int value_len, int *pos, int *found);
-
-int ntfs_insert_run(ntfs_attribute *attr, int cnum, ntfs_cluster_t cluster,
-		     int len);
-

fs/ntfs/attraops.c

+#include "ntfs.h"
+
+/*
+ * We need to define the attribute object structure. FIXME: Move these to
+ * ntfs.h.
+ */
+typedef struct {
+	ntfs_inode *a_ni;
+	ntfs_volume *a_vol;
+	atomic_t a_count;
+	s64 a_size;
+	struct rw_semaphore a_sem;
+	struct address_space a_mapping;
+	unsigned long a_flags;
+} attr_obj;
+
+/**
+ * ntfs_attr_readpage - fill a page @page of an attribute object @aobj with data
+ * @aobj:	attribute object to which the page @page belongs
+ * @page:	page cache page to fill with data
+ *
+ */
+//static int ntfs_attr_readpage(attr_obj *aobj, struct page *page)
+static int ntfs_attr_readpage(struct file *aobj, struct page *page)
+{
+	return -EOPNOTSUPP;
+}
+
+/*
+ * Address space operations for accessing attributes. Note that these functions
+ * do not accept an inode as the first parameter but an attribute object. We
+ * use this to implement a generic interface that is not bound to inodes in
+ * order to support multiple named streams per file, multiple bitmaps per file
+ * and directory, etc. Basically, this gives access to any attribute within an
+ * mft record.
+ *
+ * We make use of a slab cache for attribute object allocations.
+ */
+struct address_space_operations ntfs_attr_aops = {
+	writepage:	NULL,			/* Write dirty page to disk. */
+	readpage:	ntfs_attr_readpage,	/* Fill page with data. */
+	sync_page:	block_sync_page,	/* Currently, just unplugs the
+						   disk request queue. */
+	prepare_write:	NULL,			/* . */
+	commit_write:	NULL,			/* . */
+	//truncatepage:	NULL,			/* . */
+};
+

fs/ntfs/attrib.h

+/*
+ * attrib.h - Defines for attribute handling in NTFS Linux kernel driver.
+ *	      Part of the Linux-NTFS project.
+ *
+ * Copyright (c) 2001,2002 Anton Altaparmakov.
+ * Copyright (C) 2002 Richard Russon.
+ *
+ * This program/include file 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program/include file 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 (in the main directory of the Linux-NTFS 
+ * distribution in the file COPYING); if not, write to the Free Software
+ * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#ifndef _LINUX_NTFS_ATTRIB_H
+#define _LINUX_NTFS_ATTRIB_H
+
+#include <linux/fs.h>
+
+#include "endian.h"
+#include "types.h"
+#include "layout.h"
+
+typedef enum {
+	LCN_HOLE		= -1,	/* Keep this as highest value or die! */
+	LCN_RL_NOT_MAPPED	= -2,
+	LCN_ENOENT		= -3,
+	LCN_EINVAL		= -4,
+} LCN_SPECIAL_VALUES;
+
+/**
+ * attr_search_context - used in attribute search functions
+ * @mrec:	buffer containing mft record to search
+ * @attr:	attribute record in @mrec where to begin/continue search
+ * @is_first:	if true lookup_attr() begins search with @attr, else after @attr
+ *
+ * Structure must be initialized to zero before the first call to one of the
+ * attribute search functions. Initialize @mrec to point to the mft record to
+ * search, and @attr to point to the first attribute within @mrec (not necessary
+ * if calling the _first() functions), and set @is_first to TRUE (not necessary
+ * if calling the _first() functions).
+ *
+ * If @is_first is TRUE, the search begins with @attr. If @is_first is FALSE,
+ * the search begins after @attr. This is so that, after the first call to one
+ * of the search attribute functions, we can call the function again, without
+ * any modification of the search context, to automagically get the next
+ * matching attribute.
+ */
+typedef struct {
+	MFT_RECORD *mrec;
+	ATTR_RECORD *attr;
+	BOOL is_first;
+	ntfs_inode *ntfs_ino;
+	ATTR_LIST_ENTRY *al_entry;
+	ntfs_inode *base_ntfs_ino;
+	MFT_RECORD *base_mrec;
+	ATTR_RECORD *base_attr;
+} attr_search_context;
+
+extern run_list_element *decompress_mapping_pairs(const ntfs_volume *vol,
+		const ATTR_RECORD *attr, run_list_element *old_rl);
+
+extern int map_run_list(ntfs_inode *ni, VCN vcn);
+
+extern LCN vcn_to_lcn(const run_list_element *rl, const VCN vcn);
+
+extern BOOL find_attr(const ATTR_TYPES type, const uchar_t *name,
+		const u32 name_len, const IGNORE_CASE_BOOL ic, const u8 *val,
+		const u32 val_len, attr_search_context *ctx);
+
+BOOL lookup_attr(const ATTR_TYPES type, const uchar_t *name, const u32 name_len,
+		const IGNORE_CASE_BOOL ic, const VCN lowest_vcn, const u8 *val,
+		const u32 val_len, attr_search_context *ctx);
+
+extern int load_attribute_list(ntfs_volume *vol, run_list_element *rl, u8 *al,
+		const s64 size);
+
+static inline s64 attribute_value_length(const ATTR_RECORD *a)
+{
+	if (!a->non_resident)
+		return (s64)le32_to_cpu(a->_ARA(value_length));
+	return sle64_to_cpu(a->_ANR(data_size));
+}
+
+extern void reinit_attr_search_ctx(attr_search_context *ctx);
+extern int get_attr_search_ctx(attr_search_context **ctx, ntfs_inode *ni,
+		MFT_RECORD *mrec);
+extern void put_attr_search_ctx(attr_search_context *ctx);
+
+#endif /* _LINUX_NTFS_ATTRIB_H */
+

fs/ntfs/dir.h

-/*
- * dir.h - Header file for dir.c
- *
- * Copyright (C) 1997 Rgis Duchesne
- */
-#define ITERATE_SPLIT_DONE      1
-
-enum ntfs_iterate_e {
-    BY_POSITION,
-    BY_NAME,
-    DIR_INSERT
-};
-
-/* not all fields are used for all operations */
-typedef struct ntfs_iterate_s {
-	enum ntfs_iterate_e type;
-	ntfs_inode *dir;
-	union{
-		ntfs_u64 pos;
-		int flags;
-	}u;
-	char *result;      /* pointer to entry if found */
-	ntfs_u16* name;
-	int namelen;
-	int block;         /* current index record */
-	int newblock;      /* index record created in a split */
-	char *new_entry;
-	int new_entry_size;
-	/*ntfs_inode* new;*/
-} ntfs_iterate_s;
-
-int ntfs_getdir_unsorted(ntfs_inode *ino, ntfs_u32 *p_high, ntfs_u32* p_low,
-			 int (*cb)(ntfs_u8*, void*), void *param);
-
-int ntfs_getdir_byname(ntfs_iterate_s *walk);
-
-int ntfs_dir_add(ntfs_inode *dir, ntfs_inode *new, ntfs_attribute *name);
-
-int ntfs_check_index_record(ntfs_inode *ino, char *record);
-
-int ntfs_getdir_byposition(ntfs_iterate_s *walk);
-
-int ntfs_mkdir(ntfs_inode* dir,const char* name,int namelen, ntfs_inode *ino);
-
-int ntfs_split_indexroot(ntfs_inode *ino);
-
-int ntfs_add_index_root(ntfs_inode *ino, int type);
-