Merge cantab.net:/usr/src/bklinux-2.5 into cantab.net:/usr/src/ntfs-2.5

Documentation/filesystems/ntfs.txt

@@ -247,6 +247,12 @@ ChangeLog
 
 Note, a technical ChangeLog aimed at kernel hackers is in fs/ntfs/ChangeLog.
 
+2.1.0:
+	- Add configuration option for developmental write support.
+	- Initial implementation of file overwriting. (Writes to resident files
+	  are not written out to disk yet, so avoid writing to files smaller
+	  than about 1kiB.)
+	- Intercept/abort changes in file size as they are not implemented yet.
 2.0.25:
 	- Minor bugfixes in error code paths and small cleanups.
 2.0.24:

arch/alpha/defconfig

@@ -572,6 +572,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/a5k

@@ -385,6 +385,7 @@ CONFIG_MSDOS_FS=m
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/adi_evb

@@ -529,6 +529,7 @@ CONFIG_RAMFS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/adsbitsy

@@ -479,6 +479,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/anakin

@@ -509,6 +509,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/assabet

@@ -658,6 +658,7 @@ CONFIG_TMPFS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/badge4

@@ -844,6 +844,7 @@ CONFIG_MINIX_FS=m
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/arm/def-configs/brutus

@@ -223,6 +223,7 @@ CONFIG_UNIX98_PTY_COUNT=32
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/cerfcube

@@ -647,6 +647,7 @@ CONFIG_RAMFS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/cerfpda

@@ -685,6 +685,7 @@ CONFIG_RAMFS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/cerfpod

@@ -649,6 +649,7 @@ CONFIG_RAMFS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/clps7500

@@ -420,6 +420,8 @@ CONFIG_CLPS7500_FLASH=y
 # CONFIG_ISO9660_FS is not set
 CONFIG_MINIX_FS=y
 # CONFIG_NTFS_FS is not set
+# CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/ebsa110

@@ -531,6 +531,7 @@ CONFIG_MINIX_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/edb7211

@@ -330,6 +330,7 @@ CONFIG_RAMFS=y
 CONFIG_MINIX_FS=y
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/empeg

 #
+#
 # Example empeg-car kernel configuration file.
 #
 CONFIG_ARM=y

arch/arm/def-configs/epxa10db

@@ -544,6 +544,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/flexanet

@@ -642,6 +642,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/footbridge

@@ -615,6 +615,7 @@ CONFIG_JOLIET=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/fortunet

@@ -455,6 +455,7 @@ CONFIG_JFFS_FS_VERBOSE=0
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/freebird

@@ -492,6 +492,7 @@ CONFIG_RAMFS=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/freebird_new

@@ -512,6 +512,7 @@ CONFIG_RAMFS=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/graphicsclient

@@ -585,6 +585,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/graphicsmaster

@@ -560,6 +560,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/h3600

@@ -650,6 +650,7 @@ CONFIG_RAMFS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/huw_webpanel

@@ -336,6 +336,7 @@ CONFIG_CRAMFS=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/integrator

@@ -543,6 +543,7 @@ CONFIG_MINIX_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/iq80310

@@ -638,6 +638,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/jornada720

@@ -667,6 +667,7 @@ CONFIG_ISO9660_FS=m
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/arm/def-configs/lart

@@ -655,6 +655,7 @@ CONFIG_JOLIET=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/lubbock

@@ -702,6 +702,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/lusl7200

@@ -417,6 +417,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/neponset

@@ -762,6 +762,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/omnimeter

@@ -422,6 +422,7 @@ CONFIG_MSDOS_FS=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/pangolin

@@ -559,6 +559,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/pfs168_mqtft

@@ -598,6 +598,7 @@ CONFIG_JFFS_FS_VERBOSE=0
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/pfs168_mqvga

@@ -598,6 +598,7 @@ CONFIG_JFFS_FS_VERBOSE=0
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/pfs168_sastn

@@ -591,6 +591,7 @@ CONFIG_JFFS_FS_VERBOSE=0
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/pfs168_satft

@@ -598,6 +598,7 @@ CONFIG_JFFS_FS_VERBOSE=0
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/pleb

@@ -460,6 +460,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/rpc

@@ -620,6 +620,7 @@ CONFIG_JOLIET=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/shannon

@@ -534,6 +534,8 @@ CONFIG_RAMFS=y
 CONFIG_MINIX_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
+# CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/def-configs/shark

@@ -681,6 +681,7 @@ CONFIG_JOLIET=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/arm/def-configs/sherman

@@ -151,6 +151,8 @@ CONFIG_SERIAL_SA1100_CONSOLE=y
 # CONFIG_JOLIET is not set
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
+# CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_QNX4FS_FS is not set

arch/arm/def-configs/stork

@@ -649,6 +649,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/arm/def-configs/system3

@@ -684,6 +684,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/arm/defconfig

@@ -421,6 +421,7 @@ CONFIG_PSMOUSE=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/cris/defconfig

@@ -441,6 +441,7 @@ CONFIG_RAMFS=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/i386/defconfig

@@ -779,6 +779,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/defconfig

@@ -628,6 +628,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn1/defconfig-bigsur-mp

@@ -526,6 +526,7 @@ CONFIG_JOLIET=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn1/defconfig-bigsur-sp

@@ -526,6 +526,7 @@ CONFIG_JOLIET=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn1/defconfig-dig-mp

@@ -288,6 +288,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn1/defconfig-dig-sp

@@ -288,6 +288,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn1/defconfig-generic-mp

@@ -283,6 +283,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn1/defconfig-generic-sp

@@ -283,6 +283,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn1/defconfig-hp-sp

@@ -253,6 +253,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn1/defconfig-prom-medusa

@@ -363,6 +363,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn1/defconfig-sn1-mp

@@ -497,6 +497,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn1/defconfig-sn1-mp-modules

@@ -499,6 +499,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn1/defconfig-sn1-mp-syn1-0

@@ -497,6 +497,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn1/defconfig-sn1-sp

@@ -497,6 +497,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn2/defconfig-dig-numa

@@ -289,6 +289,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn2/defconfig-sn2-dig-mp

@@ -288,6 +288,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn2/defconfig-sn2-dig-sp

@@ -288,6 +288,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ia64/sn/configs/sn2/defconfig-sn2-mp

@@ -496,6 +496,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn2/defconfig-sn2-mp-modules

@@ -498,6 +498,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn2/defconfig-sn2-prom-medusa

@@ -371,6 +371,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ia64/sn/configs/sn2/defconfig-sn2-sp

@@ -496,6 +496,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/m68k/defconfig

@@ -228,6 +228,8 @@ CONFIG_MSDOS_FS=y
 # CONFIG_JOLIET is not set
 CONFIG_MINIX_FS=y
 # CONFIG_NTFS_FS is not set
+# CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig

@@ -443,6 +443,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-atlas

@@ -433,6 +433,7 @@ CONFIG_EFS_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-ddb5476

@@ -467,6 +467,7 @@ CONFIG_PSMOUSE=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-ddb5477

@@ -394,6 +394,7 @@ CONFIG_AUTOFS4_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-decstation

@@ -430,6 +430,7 @@ CONFIG_UNIX98_PTY_COUNT=256
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-ip22

@@ -443,6 +443,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-it8172

@@ -546,6 +546,7 @@ CONFIG_UNIX98_PTY_COUNT=256
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-malta

@@ -459,6 +459,7 @@ CONFIG_EFS_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-nino

@@ -270,6 +270,7 @@ CONFIG_UNIX98_PTY_COUNT=256
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-ocelot

@@ -395,6 +395,7 @@ CONFIG_UNIX98_PTY_COUNT=256
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-pb1000

@@ -382,6 +382,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips/defconfig-rm200

@@ -313,6 +313,7 @@ CONFIG_RTC=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips64/defconfig

@@ -400,6 +400,7 @@ CONFIG_AUTOFS_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips64/defconfig-ip22

@@ -405,6 +405,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips64/defconfig-ip27

@@ -400,6 +400,7 @@ CONFIG_AUTOFS_FS=y
 # CONFIG_FREEVXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/mips64/defconfig-ip32

@@ -430,6 +430,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/parisc/defconfig

@@ -294,6 +294,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/FADS_defconfig

@@ -376,6 +376,7 @@ CONFIG_UNIX98_PTY_COUNT=32
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/IVMS8_defconfig

@@ -404,6 +404,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/SM850_defconfig

@@ -372,6 +372,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/SPD823TS_defconfig

@@ -371,6 +371,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/TQM823L_defconfig

@@ -372,6 +372,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/TQM8260_defconfig

@@ -345,6 +345,7 @@ CONFIG_AMD_FLASH=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/TQM850L_defconfig

@@ -372,6 +372,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/TQM860L_defconfig

@@ -417,6 +417,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/adir_defconfig

@@ -514,6 +514,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/apus_defconfig

@@ -659,6 +659,7 @@ CONFIG_MINIX_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/ash_defconfig

@@ -432,6 +432,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/bseip_defconfig

@@ -371,6 +371,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/ceder_defconfig

@@ -434,6 +434,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/common_defconfig

@@ -725,6 +725,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc/configs/cpci405_defconfig

@@ -458,6 +458,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/ep405_defconfig

@@ -428,6 +428,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/est8260_defconfig

@@ -355,6 +355,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/ev64260_defconfig

@@ -473,6 +473,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc/configs/gemini_defconfig

@@ -453,6 +453,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc/configs/iSeries_defconfig

@@ -364,6 +364,7 @@ CONFIG_JOLIET=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc/configs/ibmchrp_defconfig

@@ -593,6 +593,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc/configs/k2_defconfig

@@ -494,6 +494,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/lopec_defconfig

@@ -681,6 +681,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/mbx_defconfig

@@ -364,6 +364,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/mcpn765_defconfig

@@ -404,6 +404,7 @@ CONFIG_UNIX98_PTY_COUNT=256
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/menf1_defconfig

@@ -503,6 +503,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/mvme5100_defconfig

@@ -552,6 +552,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/oak_defconfig

@@ -407,6 +407,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/pcore_defconfig

@@ -504,6 +504,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/pmac_defconfig

@@ -805,6 +805,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc/configs/power3_defconfig

@@ -577,6 +577,7 @@ CONFIG_JOLIET=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/pplus_defconfig

@@ -596,6 +596,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/prpmc750_defconfig

@@ -440,6 +440,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/prpmc800_defconfig

@@ -454,6 +454,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/redwood5_defconfig

@@ -433,6 +433,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/redwood_defconfig

@@ -372,6 +372,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/rpxcllf_defconfig

@@ -371,6 +371,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/rpxlite_defconfig

@@ -371,6 +371,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/sandpoint_defconfig

@@ -687,6 +687,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/spruce_defconfig

@@ -402,6 +402,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/walnut_defconfig

@@ -428,6 +428,7 @@ CONFIG_TMPFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/ppc/configs/zx4500_defconfig

@@ -409,6 +409,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc/defconfig

@@ -725,6 +725,7 @@ CONFIG_ISO9660_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/ppc64/defconfig

@@ -584,6 +584,7 @@ CONFIG_JFS_FS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/s390/defconfig

@@ -295,6 +295,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/s390x/defconfig

@@ -295,6 +295,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 CONFIG_DEVFS_FS=y

arch/sh/defconfig

@@ -156,6 +156,7 @@ CONFIG_SERIAL_CONSOLE=y
 # CONFIG_MINIX_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/sparc/defconfig

@@ -302,6 +302,7 @@ CONFIG_MINIX_FS=m
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 CONFIG_HPFS_FS=m
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/sparc64/defconfig

@@ -703,6 +703,7 @@ CONFIG_MINIX_FS=m
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 CONFIG_HPFS_FS=m
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

arch/x86_64/defconfig

@@ -513,6 +513,7 @@ CONFIG_RAMFS=y
 # CONFIG_VXFS_FS is not set
 # CONFIG_NTFS_FS is not set
 # CONFIG_NTFS_DEBUG is not set
+# CONFIG_NTFS_RW is not set
 # CONFIG_HPFS_FS is not set
 CONFIG_PROC_FS=y
 # CONFIG_DEVFS_FS is not set

fs/Config.help

@@ -606,6 +606,15 @@ CONFIG_NTFS_DEBUG
   When reporting bugs, please try to have available a full dump of
   debugging messages while the misbehaviour was occurring.
 
+CONFIG_NTFS_RW
+  This enables the experimental write support in the NTFS driver.
+
+  WARNING: Do not use this option unless you are actively developing
+           NTFS as it is currently guaranteed to be broken and you
+           may lose all your data!
+
+  It is strongly recommended and perfectly safe to say N here.
+
 CONFIG_SYSV_FS
   SCO, Xenix and Coherent are commercial Unix systems for Intel
   machines, and Version 7 was used on the DEC PDP-11. Saying Y

fs/Config.in

@@ -70,6 +70,7 @@ tristate 'FreeVxFS file system support (VERITAS VxFS(TM) compatible)' CONFIG_VXF
 
 tristate 'NTFS file system support (read only)' CONFIG_NTFS_FS
 dep_mbool '  NTFS debugging support' CONFIG_NTFS_DEBUG $CONFIG_NTFS_FS
+dep_mbool '  NTFS write support (DANGEROUS)' CONFIG_NTFS_RW $CONFIG_NTFS_FS $CONFIG_EXPERIMENTAL
 
 tristate 'OS/2 HPFS file system support' CONFIG_HPFS_FS
 

fs/ntfs/ChangeLog

 ToDo:
 	- Find and fix bugs.
 	- Enable NFS exporting of NTFS.
+	- Implement aops->set_page_dirty() in order to take control of buffer
+	  dirtying. Not having it means if page_has_buffers(), all buffers
+	  will be dirtied with the page. And if not they won't be. That is
+	  fine for the moment but will break once we enable metadata updates.
+	- Implement sops->dirty_inode() to implement {a,m,c} time updates and
+	  such things.
+	- Implement sops->write_inode().
+	- In between ntfs_prepare/commit_write, need exclusion between
+	  simultaneous file extensions. Need perhaps an NInoResizeUnderway()
+	  flag which we can set in ntfs_prepare_write() and clear again in
+	  ntfs_commit_write(). Just have to be careful in readpage/writepage,
+	  as well as in truncate, that we play nice... We might need to have
+	  a data_size field in the ntfs_inode to store the real attribute
+	  length. Also need to be careful with initialized_size extention in
+	  ntfs_prepare_write. Basically, just be _very_ careful in this code...
+	  OTOH, perhaps i_sem, which is held accross generic_file_write is
+	  sufficient for synchronisation here. We then just need to make sure
+	  ntfs_readpage/writepage/truncate interoperate properly with us.
+
+2.1.0 - First steps towards write support: implement file overwrite.
+
+	- Add configuration option for developmental write support with an
+	  appropriately scary configuration help text.
+	- Initial implementation of fs/ntfs/aops.c::ntfs_writepage() and its
+	  helper fs/ntfs/aops.c::ntfs_write_block(). This enables mmap(2) based
+	  overwriting of existing files on ntfs. Note: Resident files are
+	  only written into memory, and not written out to disk at present, so
+	  avoid writing to files smaller than about 1kiB.
+	- Initial implementation of fs/ntfs/aops.c::ntfs_prepare_write(), its
+	  helper fs/ntfs/aops.c::ntfs_prepare_nonresident_write() and their
+	  counterparts, fs/ntfs/aops.c::ntfs_commit_write(), and
+	  fs/ntfs/aops.c::ntfs_commit_nonresident_write(), respectively. Also,
+	  add generic_file_write() to the ntfs file operations (fs/ntfs/file.c).
+	  This enables write(2) based overwriting of existing files on ntfs.
+	  Note: As with mmap(2) based overwriting, resident files are only
+	  written into memory, and not written out to disk at present, so avoid
+	  writing to files smaller than about 1kiB.
+	- Implement ->truncate (fs/ntfs/inode.c::ntfs_truncate()) and
+	  ->setattr() (fs/ntfs/inode.c::ntfs_setattr()) inode operations for
+	  files with the purpose of intercepting and aborting all i_size
+	  changes which we do not support yet. ntfs_truncate() actually only
+	  emits a warning message but AFAICS our interception of i_size changes
+	  elsewhere means ntfs_truncate() never gets called for i_size changes.
+	  It is only called from generic_file_write() when we fail in
+	  ntfs_prepare_{,nonresident_}write() in order to discard any
+	  instantiated buffers beyond i_size. Thus i_size is not actually
+	  changed so our warning message is enough. Unfortunately it is not
+	  possible to easily determine if i_size is being changed or not hence
+	  we just emit an appropriately worded error message.
 
 2.0.25 - Small bug fixes and cleanups.
 

fs/ntfs/Makefile

@@ -5,15 +5,15 @@ obj-$(CONFIG_NTFS_FS) += ntfs.o
 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 time.o unistr.o upcase.o
 
-EXTRA_CFLAGS = -DNTFS_VERSION=\"2.0.25\"
+EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.0\"
 
 ifeq ($(CONFIG_NTFS_DEBUG),y)
 EXTRA_CFLAGS += -DDEBUG
 endif
 
-#ifeq ($(CONFIG_NTFS_RW),y)
-#EXTRA_CFLAGS += -DNTFS_RW
-#endif
+ifeq ($(CONFIG_NTFS_RW),y)
+EXTRA_CFLAGS += -DNTFS_RW
+endif
 
 include $(TOPDIR)/Rules.make
 

fs/ntfs/aops.c

@@ -385,7 +385,7 @@ int ntfs_readpage(struct file *file, struct page *page)
 	else
 		base_ni = ni->_INE(base_ntfs_ino);
 
-	/* Map, pin and lock the mft record. */
+	/* Map, pin, and lock the mft record. */
 	mrec = map_mft_record(base_ni);
 	if (unlikely(IS_ERR(mrec))) {
 		err = PTR_ERR(mrec);
@@ -435,6 +435,1337 @@ int ntfs_readpage(struct file *file, struct page *page)
 	return err;
 }
 
+#ifdef NTFS_RW
+
+/**
+ * ntfs_write_block - write a @page to the backing store
+ * @page:	page cache page to write out
+ *
+ * This function is for writing pages belonging to non-resident, non-mst
+ * protected attributes to their backing store.
+ *
+ * For a page with buffers, map and write the dirty buffers asynchronously
+ * under page writeback. For a page without buffers, create buffers for the
+ * page, then proceed as above.
+ *
+ * If a page doesn't have buffers the page dirty state is definitive. If a page
+ * does have buffers, the page dirty state is just a hint, and the buffer dirty
+ * state is definitive. (A hint which has rules: dirty buffers against a clean
+ * page is illegal. Other combinations are legal and need to be handled. In
+ * particular a dirty page containing clean buffers for example.)
+ *
+ * Return 0 on success and -errno on error.
+ *
+ * Based on ntfs_read_block() and __block_write_full_page().
+ */
+static int ntfs_write_block(struct page *page)
+{
+	VCN vcn;
+	LCN lcn;
+	sector_t block, dblock, iblock;
+	struct inode *vi;
+	ntfs_inode *ni;
+	ntfs_volume *vol;
+	run_list_element *rl;
+	struct buffer_head *bh, *head;
+	unsigned int blocksize, vcn_ofs;
+	int err;
+	BOOL need_end_writeback;
+	unsigned char blocksize_bits;
+
+	vi = page->mapping->host;
+	ni = NTFS_I(vi);
+	vol = ni->vol;
+
+	ntfs_debug("Entering for inode %li, attribute type 0x%x, page index "
+			"0x%lx.\n", vi->i_ino, ni->type, page->index);
+
+	BUG_ON(!NInoNonResident(ni));
+	BUG_ON(NInoMstProtected(ni));
+
+	blocksize_bits = vi->i_blkbits;
+	blocksize = 1 << blocksize_bits;
+
+	if (!page_has_buffers(page)) {
+		BUG_ON(!PageUptodate(page));
+		create_empty_buffers(page, blocksize,
+				(1 << BH_Uptodate) | (1 << BH_Dirty));
+	}
+	bh = head = page_buffers(page);
+	if (unlikely(!bh)) {
+		ntfs_warning(vol->sb, "Error allocating page buffers. "
+				"Redirtying page so we try again later.");
+		/*
+		 * Put the page back on mapping->dirty_pages, but leave its
+		 * buffer's dirty state as-is.
+		 */
+		// FIXME: Once Andrew's -EAGAIN patch goes in, remove the
+		// __set_page_dirty_nobuffers(page) and return -EAGAIN instead
+		// of zero.
+		__set_page_dirty_nobuffers(page);
+		unlock_page(page);
+		return 0;
+	}
+
+	/* NOTE: Different naming scheme to ntfs_read_block()! */
+
+	/* The first block in the page. */
+	block = page->index << (PAGE_CACHE_SHIFT - blocksize_bits);
+
+	/* The first out of bounds block for the data size. */
+	dblock = (vi->i_size + blocksize - 1) >> blocksize_bits;
+
+	/* The last (fully or partially) initialized block. */
+	iblock = ni->initialized_size >> blocksize_bits;
+
+	/*
+	 * Be very careful.  We have no exclusion from __set_page_dirty_buffers
+	 * here, and the (potentially unmapped) buffers may become dirty at
+	 * any time.  If a buffer becomes dirty here after we've inspected it
+	 * then we just miss that fact, and the page stays dirty.
+	 *
+	 * Buffers outside i_size may be dirtied by __set_page_dirty_buffers;
+	 * handle that here by just cleaning them.
+	 */
+
+	/*
+	 * Loop through all the buffers in the page, mapping all the dirty
+	 * buffers to disk addresses and handling any aliases from the
+	 * underlying block device's mapping.
+	 */
+	rl = NULL;
+	err = 0;
+	do {
+		BOOL is_retry = FALSE;
+
+		if (unlikely(block >= dblock)) {
+			/*
+			 * Mapped buffers outside i_size will occur, because
+			 * this page can be outside i_size when there is a
+			 * truncate in progress. The contents of such buffers
+			 * were zeroed by ntfs_writepage().
+			 *
+			 * FIXME: What about the small race window where
+			 * ntfs_writepage() has not done any clearing because
+			 * the page was within i_size but before we get here,
+			 * vmtruncate() modifies i_size?
+			 */
+			clear_buffer_dirty(bh);
+			set_buffer_uptodate(bh);
+			continue;
+		}
+
+		/* Clean buffers are not written out, so no need to map them. */
+		if (!buffer_dirty(bh))
+			continue;
+
+		/* Make sure we have enough initialized size. */
+		if (unlikely((block >= iblock) &&
+				(ni->initialized_size < vi->i_size))) {
+			/*
+			 * If this page is fully outside initialized size, zero
+			 * out all pages between the current initialized size
+			 * and the current page. Just use ntfs_readpage() to do
+			 * the zeroing transparently.
+			 */
+			if (block > iblock) {
+				// TODO:
+				// For each page do:
+				// - read_cache_page()
+				// Again for each page do:
+				// - wait_on_page_locked()
+				// - Check (PageUptodate(page) &&
+				// 			!PageError(page))
+				// Update initialized size in the attribute and
+				// in the inode.
+				// Again, for each page do:
+				// 	__set_page_dirty_buffers();
+				// page_cache_release()
+				// We don't need to wait on the writes.
+				// Update iblock.
+			}
+			/*
+			 * The current page straddles initialized size. Zero
+			 * all non-uptodate buffers and set them uptodate (and
+			 * dirty?). Note, there aren't any non-uptodate buffers
+			 * if the page is uptodate.
+			 * FIXME: For an uptodate page, the buffers may need to
+			 * be written out because they were not initialized on
+			 * disk before.
+			 */
+			if (!PageUptodate(page)) {
+				// TODO:
+				// Zero any non-uptodate buffers up to i_size.
+				// Set them uptodate and dirty.
+			}
+			// TODO:
+			// Update initialized size in the attribute and in the
+			// inode (up to i_size).
+			// Update iblock.
+			// FIXME: This is inefficient. Try to batch the two
+			// size changes to happen in one go.
+			ntfs_error(vol->sb, "Writing beyond initialized size "
+					"is not supported yet. Sorry.");
+			err = -EOPNOTSUPP;
+			break;
+			// Do NOT set_buffer_new() BUT DO clear buffer range
+			// outside write request range.
+			// set_buffer_uptodate() on complete buffers as well as
+			// set_buffer_dirty().
+		}
+
+		/* No need to map buffers that are already mapped. */
+		if (buffer_mapped(bh))
+			continue;
+
+		/* Unmapped, dirty buffer. Need to map it. */
+		bh->b_bdev = vol->sb->s_bdev;
+
+		/* Convert block into corresponding vcn and offset. */
+		vcn = (VCN)block << blocksize_bits >> vol->cluster_size_bits;
+		vcn_ofs = ((VCN)block << blocksize_bits) &
+				vol->cluster_size_mask;
+		if (!rl) {
+lock_retry_remap:
+			down_read(&ni->run_list.lock);
+			rl = ni->run_list.rl;
+		}
+		if (likely(rl != NULL)) {
+			/* Seek to element containing target vcn. */
+			while (rl->length && rl[1].vcn <= vcn)
+				rl++;
+			lcn = vcn_to_lcn(rl, vcn);
+		} else
+			lcn = (LCN)LCN_RL_NOT_MAPPED;
+		/* Successful remap. */
+		if (lcn >= 0) {
+			/* Setup buffer head to point to correct block. */
+			bh->b_blocknr = ((lcn << vol->cluster_size_bits) +
+					vcn_ofs) >> blocksize_bits;
+			set_buffer_mapped(bh);
+			continue;
+		}
+		/* It is a hole, need to instantiate it. */
+		if (lcn == LCN_HOLE) {
+			// TODO: Instantiate the hole.
+			// clear_buffer_new(bh);
+			// unmap_underlying_metadata(bh->b_bdev, bh->b_blocknr);
+			ntfs_error(vol->sb, "Writing into sparse regions is "
+					"not supported yet. Sorry.");
+			err = -EOPNOTSUPP;
+			break;
+		}
+		/* If first try and run list unmapped, map and retry. */
+		if (!is_retry && lcn == LCN_RL_NOT_MAPPED) {
+			is_retry = TRUE;
+			/*
+			 * Attempt to map run list, dropping lock for
+			 * the duration.
+			 */
+			up_read(&ni->run_list.lock);
+			err = map_run_list(ni, vcn);
+			if (likely(!err))
+				goto lock_retry_remap;
+			rl = NULL;
+		}
+		/* Failed to map the buffer, even after retrying. */
+		bh->b_blocknr = -1UL;
+		ntfs_error(vol->sb, "vcn_to_lcn(vcn = 0x%Lx) failed "
+				"with error code 0x%Lx%s.",
+				(long long)vcn, (long long)-lcn,
+				is_retry ? " even after retrying" : "");
+		// FIXME: Depending on vol->on_errors, do something.
+		if (!err)
+			err = -EIO;
+		break;
+	} while (block++, (bh = bh->b_this_page) != head);
+
+	/* Release the lock if we took it. */
+	if (rl)
+		up_read(&ni->run_list.lock);
+
+	/* For the error case, need to reset bh to the beginning. */
+	bh = head;
+
+	/* Just an optimization, so ->readpage() isn't called later. */
+	if (unlikely(!PageUptodate(page))) {
+		int uptodate = 1;
+		do {
+			if (!buffer_uptodate(bh)) {
+				uptodate = 0;
+				bh = head;
+				break;
+			}
+		} while ((bh = bh->b_this_page) != head);
+		if (uptodate)
+			SetPageUptodate(page);
+	}
+
+	/* Setup all mapped, dirty buffers for async write i/o. */
+	do {
+		get_bh(bh);
+		if (buffer_mapped(bh) && buffer_dirty(bh)) {
+			lock_buffer(bh);
+			if (test_clear_buffer_dirty(bh)) {
+				BUG_ON(!buffer_uptodate(bh));
+				mark_buffer_async_write(bh);
+			} else
+				unlock_buffer(bh);
+		} else if (unlikely(err)) {
+			/*
+			 * For the error case. The buffer may have been set
+			 * dirty during attachment to a dirty page.
+			 */
+			if (err != -ENOMEM)
+				clear_buffer_dirty(bh);
+		}
+	} while ((bh = bh->b_this_page) != head);
+
+	if (unlikely(err)) {
+		// TODO: Remove the -EOPNOTSUPP check later on...
+		if (unlikely(err == -EOPNOTSUPP))
+			err = 0;
+		else if (err == -ENOMEM) {
+			ntfs_warning(vol->sb, "Error allocating memory. "
+					"Redirtying page so we try again "
+					"later.");
+			/*
+			 * Put the page back on mapping->dirty_pages, but
+			 * leave its buffer's dirty state as-is.
+			 */
+			// FIXME: Once Andrew's -EAGAIN patch goes in, remove
+			// the __set_page_dirty_nobuffers(page) and set err to
+			// -EAGAIN instead of zero.
+			__set_page_dirty_nobuffers(page);
+			err = 0;
+		} else
+			SetPageError(page);
+	}
+
+	BUG_ON(PageWriteback(page));
+	SetPageWriteback(page);		/* Keeps try_to_free_buffers() away. */
+	unlock_page(page);
+
+	/*
+	 * Submit the prepared buffers for i/o. Note the page is unlocked,
+	 * and the async write i/o completion handler can end_page_writeback()
+	 * at any time after the *first* submit_bh(). So the buffers can then
+	 * disappear...
+	 */
+	need_end_writeback = TRUE;
+	do {
+		struct buffer_head *next = bh->b_this_page;
+		if (buffer_async_write(bh)) {
+			submit_bh(WRITE, bh);
+			need_end_writeback = FALSE;
+		}
+		put_bh(bh);
+		bh = next;
+	} while (bh != head);
+
+	/* If no i/o was started, need to end_page_writeback(). */
+	if (unlikely(need_end_writeback))
+		end_page_writeback(page);
+
+	ntfs_debug("Done.");
+	return err;
+}
+
+/**
+ * ntfs_writepage - write a @page to the backing store
+ * @page:	page cache page to write out
+ *
+ * For non-resident attributes, ntfs_writepage() writes the @page by calling
+ * the ntfs version of the generic block_write_full_page() function,
+ * ntfs_write_block(), which in turn if necessary creates and writes the
+ * buffers associated with the page asynchronously.
+ *
+ * For resident attributes, OTOH, ntfs_writepage() writes the @page by copying
+ * the data to the mft record (which at this stage is most likely in memory).
+ * Thus, in this case, I/O is synchronous, as even if the mft record is not
+ * cached at this point in time, we need to wait for it to be read in before we
+ * can do the copy.
+ *
+ * Note the caller clears the page dirty flag before calling ntfs_writepage().
+ *
+ * Based on ntfs_readpage() and fs/buffer.c::block_write_full_page().
+ *
+ * Return 0 on success and -errno on error.
+ */
+static int ntfs_writepage(struct page *page)
+{
+	s64 attr_pos;
+	struct inode *vi;
+	ntfs_inode *ni, *base_ni;
+	char *kaddr;
+	attr_search_context *ctx;
+	MFT_RECORD *m;
+	u32 attr_len, bytes;
+	int err;
+
+	BUG_ON(!PageLocked(page));
+
+	vi = page->mapping->host;
+
+	/* Is the page fully outside i_size? (truncate in progress) */
+	if (unlikely(page->index >= (vi->i_size + PAGE_CACHE_SIZE - 1) >>
+			PAGE_CACHE_SHIFT)) {
+		unlock_page(page);
+		ntfs_debug("Write outside i_size. Returning i/o error.");
+		return -EIO;
+	}
+
+	ni = NTFS_I(vi);
+
+	if (NInoNonResident(ni)) {
+		/*
+		 * Only unnamed $DATA attributes can be compressed, encrypted,
+		 * and/or sparse.
+		 */
+		if (ni->type == AT_DATA && !ni->name_len) {
+			/* If file is encrypted, deny access, just like NT4. */
+			if (NInoEncrypted(ni)) {
+				unlock_page(page);
+				ntfs_debug("Denying write access to encrypted "
+						"file.");
+				return -EACCES;
+			}
+			/* Compressed data streams are handled in compress.c. */
+			if (NInoCompressed(ni)) {
+				// TODO: Implement and replace this check with
+				// return ntfs_write_compressed_block(page);
+				unlock_page(page);
+				ntfs_error(vi->i_sb, "Writing to compressed "
+						"files is not supported yet. "
+						"Sorry.");
+				return -EOPNOTSUPP;
+			}
+			// TODO: Implement and remove this check.
+			if (NInoSparse(ni)) {
+				unlock_page(page);
+				ntfs_error(vi->i_sb, "Writing to sparse files "
+						"is not supported yet. Sorry.");
+				return -EOPNOTSUPP;
+			}
+		}
+
+		/* We have to zero every time due to mmap-at-end-of-file. */
+		if (page->index >= (vi->i_size >> PAGE_CACHE_SHIFT)) {
+			/* The page straddles i_size. */
+			unsigned int ofs = vi->i_size & ~PAGE_CACHE_MASK;
+			kaddr = kmap_atomic(page, KM_USER0);
+			memset(kaddr + ofs, 0, PAGE_CACHE_SIZE - ofs);
+			flush_dcache_page(page);
+			kunmap_atomic(kaddr, KM_USER0);
+		}
+
+		// TODO: Implement and remove this check.
+		if (NInoMstProtected(ni)) {
+			unlock_page(page);
+			ntfs_error(vi->i_sb, "Writing to MST protected "
+					"attributes is not supported yet. "
+					"Sorry.");
+			return -EOPNOTSUPP;
+		}
+
+		/* Normal data stream. */
+		return ntfs_write_block(page);
+	}
+
+	/*
+	 * Attribute is resident, implying it is not compressed, encrypted, or
+	 * mst protected.
+	 */
+	BUG_ON(page_has_buffers(page));
+	BUG_ON(!PageUptodate(page));
+
+	// TODO: Consider using PageWriteback() + unlock_page() in 2.5 once the
+	// "VM fiddling has ended". Note, don't forget to replace all the
+	// unlock_page() calls further below with end_page_writeback() ones.
+	// FIXME: Make sure it is ok to SetPageError() on unlocked page under
+	// writeback before doing the change!
+#if 0
+	SetPageWriteback(page);
+	unlock_page(page);
+#endif
+
+	if (!NInoAttr(ni))
+		base_ni = ni;
+	else
+		base_ni = ni->_INE(base_ntfs_ino);
+
+	/* Map, pin, and lock the mft record. */
+	m = map_mft_record(base_ni);
+	if (unlikely(IS_ERR(m))) {
+		err = PTR_ERR(m);
+		m = NULL;
+		ctx = NULL;
+		goto err_out;
+	}
+	ctx = get_attr_search_ctx(base_ni, m);
+	if (unlikely(!ctx)) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+	if (unlikely(!lookup_attr(ni->type, ni->name, ni->name_len,
+			IGNORE_CASE, 0, NULL, 0, ctx))) {
+		err = -ENOENT;
+		goto err_out;
+	}
+
+	/* Starting position of the page within the attribute value. */
+	attr_pos = page->index << PAGE_CACHE_SHIFT;
+
+	/* The total length of the attribute value. */
+	attr_len = le32_to_cpu(ctx->attr->_ARA(value_length));
+
+	if (unlikely(vi->i_size != attr_len)) {
+		ntfs_error(vi->i_sb, "BUG()! i_size (0x%Lx) doesn't match "
+				"attr_len (0x%x). Aborting write.", vi->i_size,
+				attr_len);
+		err = -EIO;
+		goto err_out;
+	}
+	if (unlikely(attr_pos >= attr_len)) {
+		ntfs_error(vi->i_sb, "BUG()! attr_pos (0x%Lx) > attr_len (0x%x)"
+				". Aborting write.", attr_pos, attr_len);
+		err = -EIO;
+		goto err_out;
+	}
+
+	bytes = attr_len - attr_pos;
+	if (unlikely(bytes > PAGE_CACHE_SIZE))
+		bytes = PAGE_CACHE_SIZE;
+
+	/*
+	 * Here, we don't need to zero the out of bounds area everytime because
+	 * the below memcpy() already takes care of the mmap-at-end-of-file
+	 * requirements. If the file is converted to a non-resident one, then
+	 * the code path use is switched to the non-resident one where the
+	 * zeroing happens on each ntfs_writepage() invokation.
+	 *
+	 * The above also applies nicely when i_size is decreased.
+	 *
+	 * When i_size is increased, the memory between the old and new i_size
+	 * _must_ be zeroed (or overwritten with new data). Otherwise we will
+	 * expose data to userspace/disk which should never have been exposed.
+	 *
+	 * FIXME: Ensure that i_size increases do the zeroing/overwriting and
+	 * if we cannot guarantee that, then enable the zeroing below.
+	 */
+
+	kaddr = kmap_atomic(page, KM_USER0);
+	/* Copy the data from the page to the mft record. */
+	memcpy((u8*)ctx->attr + le16_to_cpu(ctx->attr->_ARA(value_offset)) +
+			attr_pos, kaddr, bytes);
+	flush_dcache_mft_record_page(ctx->ntfs_ino);
+#if 0
+	/* Zero out of bounds area. */
+	if (likely(bytes < PAGE_CACHE_SIZE)) {
+		memset(kaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
+		flush_dcache_page(page);
+	}
+#endif
+	kunmap_atomic(kaddr, KM_USER0);
+
+	unlock_page(page);
+
+	// TODO: Mark mft record dirty so it gets written back.
+	ntfs_error(vi->i_sb, "Writing to resident files is not supported yet. "
+			"Wrote to memory only...");
+
+	put_attr_search_ctx(ctx);
+	unmap_mft_record(base_ni);
+	return 0;
+err_out:
+	if (err == -ENOMEM) {
+		ntfs_warning(vi->i_sb, "Error allocating memory. Redirtying "
+				"page so we try again later.");
+		/*
+		 * Put the page back on mapping->dirty_pages, but leave its
+		 * buffer's dirty state as-is.
+		 */
+		// FIXME: Once Andrew's -EAGAIN patch goes in, remove the
+		// __set_page_dirty_nobuffers(page) and set err to -EAGAIN
+		// instead of zero.
+		__set_page_dirty_nobuffers(page);
+		err = 0;
+	} else {
+		ntfs_error(vi->i_sb, "Resident attribute write failed with "
+				"error %i. Setting page error flag.", -err);
+		SetPageError(page);
+	}
+	unlock_page(page);
+	if (ctx)
+		put_attr_search_ctx(ctx);
+	if (m)
+		unmap_mft_record(base_ni);
+	return err;
+}
+
+/**
+ * ntfs_prepare_nonresident_write -
+ *
+ */
+static int ntfs_prepare_nonresident_write(struct page *page,
+		unsigned from, unsigned to)
+{
+	VCN vcn;
+	LCN lcn;
+	sector_t block, ablock, iblock;
+	struct inode *vi;
+	ntfs_inode *ni;
+	ntfs_volume *vol;
+	run_list_element *rl;
+	struct buffer_head *bh, *head, *wait[2], **wait_bh = wait;
+	char *kaddr = page_address(page);
+	unsigned int vcn_ofs, block_start, block_end, blocksize;
+	int err;
+	BOOL is_retry;
+	unsigned char blocksize_bits;
+
+	vi = page->mapping->host;
+	ni = NTFS_I(vi);
+	vol = ni->vol;
+
+	ntfs_debug("Entering for inode %li, attribute type 0x%x, page index "
+			"0x%lx, from = %u, to = %u.", vi->i_ino, ni->type,
+			page->index, from, to);
+
+	BUG_ON(!NInoNonResident(ni));
+	BUG_ON(NInoMstProtected(ni));
+
+	blocksize_bits = vi->i_blkbits;
+	blocksize = 1 << blocksize_bits;
+
+	/*
+	 * create_empty_buffers() will create uptodate/dirty buffers if the
+	 * page is uptodate/dirty.
+	 */
+	if (!page_has_buffers(page))
+		create_empty_buffers(page, blocksize, 0);
+	bh = head = page_buffers(page);
+	if (unlikely(!bh))
+		return -ENOMEM;
+
+	/* The first block in the page. */
+	block = page->index << (PAGE_CACHE_SHIFT - blocksize_bits);
+
+	/*
+	 * The first out of bounds block for the allocated size. No need to
+	 * round up as allocated_size is in multiples of cluster size and the
+	 * minimum cluster size is 512 bytes, which is equal to the smallest
+	 * blocksize.
+	 */
+	ablock = ni->allocated_size >> blocksize_bits;
+
+	/* The last (fully or partially) initialized block. */
+	iblock = ni->initialized_size >> blocksize_bits;
+
+	/* Loop through all the buffers in the page. */
+	block_start = 0;
+	rl = NULL;
+	err = 0;
+	do {
+		block_end = block_start + blocksize;
+		/*
+		 * If buffer @bh is outside the write, just mark it uptodate
+		 * if the page is uptodate and continue with the next buffer.
+		 */
+		if (block_end <= from || block_start >= to) {
+			if (PageUptodate(page)) {
+				if (!buffer_uptodate(bh))
+					set_buffer_uptodate(bh);
+			}
+			continue;
+		}
+		/*
+		 * @bh is at least partially being written to.
+		 * Make sure it is not marked as new.
+		 */
+		//if (buffer_new(bh))
+		//	clear_buffer_new(bh);
+
+		if (block >= ablock) {
+			// TODO: block is above allocated_size, need to
+			// allocate it. Best done in one go to accomodate not
+			// only block but all above blocks up to and including:
+			// ((page->index << PAGE_CACHE_SHIFT) + to + blocksize
+			// - 1) >> blobksize_bits. Obviously will need to round
+			// up to next cluster boundary, too. This should be
+			// done with a helper function, so it can be reused.
+			ntfs_error(vol->sb, "Writing beyond allocated size "
+					"is not supported yet. Sorry.");
+			err = -EOPNOTSUPP;
+			goto err_out;
+			// Need to update ablock.
+			// Need to set_buffer_new() on all block bhs that are
+			// newly allocated.
+		}
+		/*
+		 * Now we have enough allocated size to fulfill the whole
+		 * request, i.e. block < ablock is true.
+		 */
+		if (unlikely((block >= iblock) &&
+				(ni->initialized_size < vi->i_size))) {
+			/*
+			 * If this page is fully outside initialized size, zero
+			 * out all pages between the current initialized size
+			 * and the current page. Just use ntfs_readpage() to do
+			 * the zeroing transparently.
+			 */
+			if (block > iblock) {
+				// TODO:
+				// For each page do:
+				// - read_cache_page()
+				// Again for each page do:
+				// - wait_on_page_locked()
+				// - Check (PageUptodate(page) &&
+				// 			!PageError(page))
+				// Update initialized size in the attribute and
+				// in the inode.
+				// Again, for each page do:
+				// 	__set_page_dirty_buffers();
+				// page_cache_release()
+				// We don't need to wait on the writes.
+				// Update iblock.
+			}
+			/*
+			 * The current page straddles initialized size. Zero
+			 * all non-uptodate buffers and set them uptodate (and
+			 * dirty?). Note, there aren't any non-uptodate buffers
+			 * if the page is uptodate.
+			 * FIXME: For an uptodate page, the buffers may need to
+			 * be written out because they were not initialized on
+			 * disk before.
+			 */
+			if (!PageUptodate(page)) {
+				// TODO:
+				// Zero any non-uptodate buffers up to i_size.
+				// Set them uptodate and dirty.
+			}
+			// TODO:
+			// Update initialized size in the attribute and in the
+			// inode (up to i_size).
+			// Update iblock.
+			// FIXME: This is inefficient. Try to batch the two
+			// size changes to happen in one go.
+			ntfs_error(vol->sb, "Writing beyond initialized size "
+					"is not supported yet. Sorry.");
+			err = -EOPNOTSUPP;
+			goto err_out;
+			// Do NOT set_buffer_new() BUT DO clear buffer range
+			// outside write request range.
+			// set_buffer_uptodate() on complete buffers as well as
+			// set_buffer_dirty().
+		}
+
+		/* Need to map unmapped buffers. */
+		if (!buffer_mapped(bh)) {
+			/* Unmapped buffer. Need to map it. */
+			bh->b_bdev = vol->sb->s_bdev;
+
+			/* Convert block into corresponding vcn and offset. */
+			vcn = (VCN)block << blocksize_bits >>
+					vol->cluster_size_bits;
+			vcn_ofs = ((VCN)block << blocksize_bits) &
+					vol->cluster_size_mask;
+
+			is_retry = FALSE;
+			if (!rl) {
+lock_retry_remap:
+				down_read(&ni->run_list.lock);
+				rl = ni->run_list.rl;
+			}
+			if (likely(rl != NULL)) {
+				/* Seek to element containing target vcn. */
+				while (rl->length && rl[1].vcn <= vcn)
+					rl++;
+				lcn = vcn_to_lcn(rl, vcn);
+			} else
+				lcn = (LCN)LCN_RL_NOT_MAPPED;
+			if (unlikely(lcn < 0)) {
+				/*
+				 * We extended the attribute allocation above.
+				 * If we hit an ENOENT here it means that the
+				 * allocation was insufficient which is a bug.
+				 */
+				BUG_ON(lcn == LCN_ENOENT);
+
+				/* It is a hole, need to instantiate it. */
+				if (lcn == LCN_HOLE) {
+					// TODO: Instantiate the hole.
+					// clear_buffer_new(bh);
+					// unmap_underlying_metadata(bh->b_bdev,
+					// 		bh->b_blocknr);
+					// For non-uptodate buffers, need to
+					// zero out the region outside the
+					// request in this bh or all bhs,
+					// depending on what we implemented
+					// above.
+					// Need to flush_dcache_page().
+					// Or could use set_buffer_new()
+					// instead?
+					ntfs_error(vol->sb, "Writing into "
+							"sparse regions is "
+							"not supported yet. "
+							"Sorry.");
+					err = -EOPNOTSUPP;
+					goto err_out;
+				} else if (!is_retry &&
+						lcn == LCN_RL_NOT_MAPPED) {
+					is_retry = TRUE;
+					/*
+					 * Attempt to map run list, dropping
+					 * lock for the duration.
+					 */
+					up_read(&ni->run_list.lock);
+					err = map_run_list(ni, vcn);
+					if (likely(!err))
+						goto lock_retry_remap;
+					rl = NULL;
+				}
+				/*
+				 * Failed to map the buffer, even after
+				 * retrying.
+				 */
+				bh->b_blocknr = -1UL;
+				ntfs_error(vol->sb, "vcn_to_lcn(vcn = 0x%Lx) "
+						"failed with error code "
+						"0x%Lx%s.", (long long)vcn,
+						(long long)-lcn, is_retry ?
+						" even after retrying" : "");
+				// FIXME: Depending on vol->on_errors, do
+				// something.
+				if (!err)
+					err = -EIO;
+				goto err_out;
+			}
+			/* We now have a successful remap, i.e. lcn >= 0. */
+
+			/* Setup buffer head to correct block. */
+			bh->b_blocknr = ((lcn << vol->cluster_size_bits)
+					+ vcn_ofs) >> blocksize_bits;
+			set_buffer_mapped(bh);
+
+			// FIXME: Something analogous to this is needed for
+			// each newly allocated block, i.e. BH_New.
+			// FIXME: Might need to take this out of the
+			// if (!buffer_mapped(bh)) {}, depending on how we
+			// implement things during the allocated_size and
+			// initialized_size extension code above.
+			if (buffer_new(bh)) {
+				clear_buffer_new(bh);
+				unmap_underlying_metadata(bh->b_bdev,
+						bh->b_blocknr);
+				if (PageUptodate(page)) {
+					set_buffer_uptodate(bh);
+					continue;
+				}
+				/*
+				 * Page is _not_ uptodate, zero surrounding
+				 * region. NOTE: This is how we decide if to
+				 * zero or not!
+				 */
+				if (block_end > to)
+					memset(kaddr + to, 0, block_end - to);
+				if (block_start < from)
+					memset(kaddr + block_start, 0,
+							from - block_start);
+				if (block_end > to || block_start < from)
+					flush_dcache_page(page);
+				continue;
+			}
+		}
+		/* @bh is mapped, set it uptodate if the page is uptodate. */
+		if (PageUptodate(page)) {
+			if (!buffer_uptodate(bh))
+				set_buffer_uptodate(bh);
+			continue; 
+		}
+		/*
+		 * The page is not uptodate. The buffer is mapped. If it is not
+		 * uptodate, and it is only partially being written to, we need
+		 * to read the buffer in before the write, i.e. right now.
+		 */
+		if (!buffer_uptodate(bh) &&
+				(block_start < from || block_end > to)) {
+			ll_rw_block(READ, 1, &bh);
+			*wait_bh++ = bh;
+		}
+	} while (block++, block_start = block_end,
+			(bh = bh->b_this_page) != head);
+
+	/* Release the lock if we took it. */
+	if (rl) {
+		up_read(&ni->run_list.lock);
+		rl = NULL;
+	}
+
+	/* If we issued read requests, let them complete. */
+	while (wait_bh > wait) {
+		wait_on_buffer(*--wait_bh);
+		if (!buffer_uptodate(*wait_bh))
+			return -EIO;
+	}
+
+	ntfs_debug("Done.");
+	return 0;
+err_out:
+	/*
+	 * Zero out any newly allocated blocks to avoid exposing stale data.
+	 * If BH_New is set, we know that the block was newly allocated in the
+	 * above loop.
+	 * FIXME: What about initialized_size increments? Have we done all the
+	 * required zeroing above? If not this error handling is broken, and
+	 * in particular the if (block_end <= from) check is completely bogus.
+	 */
+	bh = head;
+	block_start = 0;
+	is_retry = FALSE;
+	do {
+		block_end = block_start + blocksize;
+		if (block_end <= from)
+			continue;
+		if (block_start >= to)
+			break;
+		if (buffer_new(bh)) {
+			clear_buffer_new(bh);
+			if (buffer_uptodate(bh))
+				buffer_error();
+			memset(kaddr + block_start, 0, bh->b_size);
+			set_buffer_uptodate(bh);
+			mark_buffer_dirty(bh);
+			is_retry = TRUE;
+		}
+	} while (block_start = block_end, (bh = bh->b_this_page) != head);
+	if (is_retry)
+		flush_dcache_page(page);
+	if (rl)
+		up_read(&ni->run_list.lock);
+	return err;
+}
+
+/**
+ * ntfs_prepare_write - prepare a page for receiving data
+ *
+ * This is called from generic_file_write() with i_sem held on the inode
+ * (@page->mapping->host). The @page is locked and kmap()ped so page_address()
+ * can simply be used. The source data has not yet been copied into the @page.
+ *
+ * Need to extend the attribute/fill in holes if necessary, create blocks and
+ * make partially overwritten blocks uptodate,
+ *
+ * i_size is not to be modified yet.
+ *
+ * Return 0 on success or -errno on error.
+ *
+ * Should be using block_prepare_write() [support for sparse files] or
+ * cont_prepare_write() [no support for sparse files]. Can't do that due to
+ * ntfs specifics but can look at them for implementation guidancea.
+ *
+ * Note: In the range, @from is inclusive and @to is exclusive, i.e. @from is
+ * the first byte in the page that will be written to and @to is the first byte
+ * after the last byte that will be written to.
+ */
+static int ntfs_prepare_write(struct file *file, struct page *page,
+		unsigned from, unsigned to)
+{
+	struct inode *vi = page->mapping->host;
+	ntfs_inode   *ni = NTFS_I(vi);
+
+	ntfs_debug("Entering for inode %li, attribute type 0x%x, page index "
+			"0x%lx, from = %u, to = %u.", vi->i_ino, ni->type,
+			page->index, from, to);
+
+	BUG_ON(!PageLocked(page));
+	BUG_ON(from > PAGE_CACHE_SIZE);
+	BUG_ON(to > PAGE_CACHE_SIZE);
+	BUG_ON(from > to);
+
+	if (NInoNonResident(ni)) {
+		/*
+		 * Only unnamed $DATA attributes can be compressed, encrypted,
+		 * and/or sparse.
+		 */
+		if (ni->type == AT_DATA && !ni->name_len) {
+			/* If file is encrypted, deny access, just like NT4. */
+			if (NInoEncrypted(ni)) {
+				ntfs_debug("Denying write access to encrypted "
+						"file.");
+				return -EACCES;
+			}
+			/* Compressed data streams are handled in compress.c. */
+			if (NInoCompressed(ni)) {
+				// TODO: Implement and replace this check with
+				// return ntfs_write_compressed_block(page);
+				ntfs_error(vi->i_sb, "Writing to compressed "
+						"files is not supported yet. "
+						"Sorry.");
+				return -EOPNOTSUPP;
+			}
+			// TODO: Implement and remove this check.
+			if (NInoSparse(ni)) {
+				ntfs_error(vi->i_sb, "Writing to sparse files "
+						"is not supported yet. Sorry.");
+				return -EOPNOTSUPP;
+			}
+		}
+
+		// TODO: Implement and remove this check.
+		if (NInoMstProtected(ni)) {
+			ntfs_error(vi->i_sb, "Writing to MST protected "
+					"attributes is not supported yet. "
+					"Sorry.");
+			return -EOPNOTSUPP;
+		}
+
+		/* Normal data stream. */
+		return ntfs_prepare_nonresident_write(page, from, to);
+	}
+
+	/*
+	 * Attribute is resident, implying it is not compressed, encrypted, or
+	 * mst protected.
+	 */
+	BUG_ON(page_has_buffers(page));
+
+	/* Do we need to resize the attribute? */
+	if (((s64)page->index << PAGE_CACHE_SHIFT) + to > vi->i_size) {
+		// TODO: Implement resize...
+		ntfs_error(vi->i_sb, "Writing beyond the existing file size is "
+				"not supported yet. Sorry.");
+		return -EOPNOTSUPP;
+	}
+
+	/*
+	 * Because resident attributes are handled by memcpy() to/from the
+	 * corresponding MFT record, and because this form of i/o is byte
+	 * aligned rather than block aligned, there is no need to bring the
+	 * page uptodate here as in the non-resident case where we need to
+	 * bring the buffers straddled by the write uptodate before
+	 * generic_file_write() does the copying from userspace.
+	 *
+	 * We thus defer the uptodate bringing of the page region outside the
+	 * region written to to ntfs_commit_write(). The reason for doing this
+	 * is that we save one round of:
+	 *	map_mft_record(), get_attr_search_ctx(), lookup_attr(),
+	 *	kmap_atomic(), kunmap_atomic(), put_attr_search_ctx(),
+	 *	unmap_mft_record().
+	 * Which is obviously a very worthwhile save.
+	 *
+	 * Thus we just return success now...
+	 */
+	ntfs_debug("Done.");
+	return 0;
+}
+
+/*
+ * NOTES: There is a disparity between the apparent need to extend the
+ * attribute in prepare write but to update i_size only in commit write.
+ * Need to make sure i_sem protection is sufficient. And if not will need to
+ * handle this in some way or another.
+ */
+
+/**
+ * ntfs_commit_nonresident_write -
+ *
+ */
+static int ntfs_commit_nonresident_write(struct page *page,
+		unsigned from, unsigned to)
+{
+	s64 pos = ((s64)page->index << PAGE_CACHE_SHIFT) + to;
+	struct inode *vi;
+	struct buffer_head *bh, *head;
+	unsigned int block_start, block_end, blocksize;
+	BOOL partial;
+
+	vi = page->mapping->host;
+
+	ntfs_debug("Entering for inode %li, attribute type 0x%x, page index "
+			"0x%lx, from = %u, to = %u.", vi->i_ino,
+			NTFS_I(vi)->type, page->index, from, to);
+
+	blocksize = 1 << vi->i_blkbits;
+
+	// FIXME: We need a whole slew of special cases in here for MST
+	// protected attributes for example. For compressed files, too...
+	// For now, we know ntfs_prepare_write() would have failed so we can't
+	// get here in any of the cases which we have to special case, so we
+	// are just a ripped off unrolled generic_commit_write() at present.
+
+	bh = head = page_buffers(page);
+	block_start = 0;
+	partial = FALSE;
+	do {
+		block_end = block_start + blocksize;
+		if (block_end <= from || block_start >= to) {
+			if (!buffer_uptodate(bh))
+				partial = TRUE;
+		} else {
+			set_buffer_uptodate(bh);
+			mark_buffer_dirty(bh);
+		}
+	} while (block_start = block_end, (bh = bh->b_this_page) != head);
+
+	/*
+	 * If this is a partial write which happened to make all buffers
+	 * uptodate then we can optimize away a bogus ->readpage() for the next
+	 * read(). Here we 'discover' whether the page went uptodate as a
+	 * result of this (potentially partial) write.
+	 */
+	if (!partial)
+		SetPageUptodate(page);
+
+	/*
+	 * Not convinced about this at all. See disparity comment above. For
+	 * now we know ntfs_prepare_write() would have failed in the write
+	 * exceeds i_size case, so this will never trigger which is fine.
+	 */
+	if (pos > vi->i_size) {
+		ntfs_error(vi->i_sb, "Writing beyond the existing file size is "
+				"not supported yet. Sorry.");
+		// vi->i_size = pos;
+		// mark_inode_dirty(vi);
+	}
+	ntfs_debug("Done.");
+	return 0;
+}
+
+/**
+ * ntfs_commit_write - commit the received data
+ *
+ * This is called from generic_file_write() with i_sem held on the inode
+ * (@page->mapping->host). The @page is locked and kmap()ped so page_address()
+ * can simply be used. The source data has already been copied into the @page.
+ *
+ * Need to mark modified blocks dirty so they get written out later when
+ * ntfs_writepage() is invoked by the VM.
+ *
+ * Return 0 on success or -errno on error.
+ *
+ * Should be using generic_commit_write(). This marks buffers uptodate and
+ * dirty, sets the page uptodate if all buffers in the page are uptodate, and
+ * updates i_size if the end of io is beyond i_size. In that case, it also
+ * marks the inode dirty. - We could still use this (obviously except for
+ * NInoMstProtected() attributes, where we will need to duplicate the core code
+ * because we need our own async_io completion handler) but we could just do
+ * the i_size update in prepare write, when we resize the attribute. Then
+ * we would avoid the i_size update and mark_inode_dirty() happening here.
+ *
+ * Can't use generic_commit_write() due to ntfs specialities but can look at
+ * it for implementation guidance.
+ *
+ * If things have gone as outlined in ntfs_prepare_write(), then we do not
+ * need to do any page content modifications here at all, except in the write
+ * to resident attribute case, where we need to do the uptodate bringing here
+ * which we combine with the copying into the mft record which means we only
+ * need to map the mft record and find the attribute record in it only once.
+ */
+static int ntfs_commit_write(struct file *file, struct page *page,
+		unsigned from, unsigned to)
+{
+	s64 attr_pos;
+	struct inode *vi;
+	ntfs_inode *ni, *base_ni;
+	char *kaddr, *kattr;
+	attr_search_context *ctx;
+	MFT_RECORD *m;
+	u32 attr_len, bytes;
+	int err;
+
+	vi = page->mapping->host;
+	ni = NTFS_I(vi);
+
+	ntfs_debug("Entering for inode %li, attribute type 0x%x, page index "
+			"0x%lx, from = %u, to = %u.", vi->i_ino, ni->type,
+			page->index, from, to);
+
+	if (NInoNonResident(ni)) {
+		/*
+		 * Only unnamed $DATA attributes can be compressed, encrypted,
+		 * and/or sparse.
+		 */
+		if (ni->type == AT_DATA && !ni->name_len) {
+			/* If file is encrypted, deny access, just like NT4. */
+			if (NInoEncrypted(ni)) {
+				// Should never get here!
+				ntfs_debug("Denying write access to encrypted "
+						"file.");
+				return -EACCES;
+			}
+			/* Compressed data streams are handled in compress.c. */
+			if (NInoCompressed(ni)) {
+				// TODO: Implement and replace this check with
+				// return ntfs_write_compressed_block(page);
+				// Should never get here!
+				ntfs_error(vi->i_sb, "Writing to compressed "
+						"files is not supported yet. "
+						"Sorry.");
+				return -EOPNOTSUPP;
+			}
+			// TODO: Implement and remove this check.
+			if (NInoSparse(ni)) {
+				// Should never get here!
+				ntfs_error(vi->i_sb, "Writing to sparse files "
+						"is not supported yet. Sorry.");
+				return -EOPNOTSUPP;
+			}
+		}
+
+		// TODO: Implement and remove this check.
+		if (NInoMstProtected(ni)) {
+			// Should never get here!
+			ntfs_error(vi->i_sb, "Writing to MST protected "
+					"attributes is not supported yet. "
+					"Sorry.");
+			return -EOPNOTSUPP;
+		}
+
+		/* Normal data stream. */
+		return ntfs_commit_nonresident_write(page, from, to);
+	}
+
+	/*
+	 * Attribute is resident, implying it is not compressed, encrypted, or
+	 * mst protected.
+	 */
+
+	/* Do we need to resize the attribute? */
+	if (((s64)page->index << PAGE_CACHE_SHIFT) + to > vi->i_size) {
+		// TODO: Implement resize...
+		// pos = ((s64)page->index << PAGE_CACHE_SHIFT) + to;
+		// vi->i_size = pos;
+		// mark_inode_dirty(vi);
+		// Should never get here!
+		ntfs_error(vi->i_sb, "Writing beyond the existing file size is "
+				"not supported yet. Sorry.");
+		return -EOPNOTSUPP;
+	}
+
+	if (!NInoAttr(ni))
+		base_ni = ni;
+	else
+		base_ni = ni->_INE(base_ntfs_ino);
+
+	/* Map, pin, and lock the mft record. */
+	m = map_mft_record(base_ni);
+	if (unlikely(IS_ERR(m))) {
+		err = PTR_ERR(m);
+		m = NULL;
+		ctx = NULL;
+		goto err_out;
+	}
+	ctx = get_attr_search_ctx(base_ni, m);
+	if (unlikely(!ctx)) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+	if (unlikely(!lookup_attr(ni->type, ni->name, ni->name_len,
+			IGNORE_CASE, 0, NULL, 0, ctx))) {
+		err = -ENOENT;
+		goto err_out;
+	}
+
+	/* Starting position of the page within the attribute value. */
+	attr_pos = page->index << PAGE_CACHE_SHIFT;
+
+	/* The total length of the attribute value. */
+	attr_len = le32_to_cpu(ctx->attr->_ARA(value_length));
+
+	if (unlikely(vi->i_size != attr_len)) {
+		ntfs_error(vi->i_sb, "BUG()! i_size (0x%Lx) doesn't match "
+				"attr_len (0x%x). Aborting write.", vi->i_size,
+				attr_len);
+		err = -EIO;
+		goto err_out;
+	}
+	if (unlikely(attr_pos >= attr_len)) {
+		ntfs_error(vi->i_sb, "BUG()! attr_pos (0x%Lx) > attr_len (0x%x)"
+				". Aborting write.", attr_pos, attr_len);
+		err = -EIO;
+		goto err_out;
+	}
+
+	bytes = attr_len - attr_pos;
+	if (unlikely(bytes > PAGE_CACHE_SIZE))
+		bytes = PAGE_CACHE_SIZE;
+
+	/*
+	 * Calculate the address of the attribute value corresponding to the
+	 * beginning of the current data @page.
+	 */
+	kattr = (u8*)ctx->attr + le16_to_cpu(ctx->attr->_ARA(value_offset)) +
+			attr_pos;
+
+	kaddr = kmap_atomic(page, KM_USER0);
+
+	/* Copy the received data from the page to the mft record. */
+	memcpy(kattr + from, kaddr + from, to - from);
+	flush_dcache_mft_record_page(ctx->ntfs_ino);
+
+	if (!PageUptodate(page)) {
+		/*
+		 * Bring the out of bounds area(s) uptodate by copying data
+		 * from the mft record to the page.
+	 	 */
+		if (from > 0)
+			memcpy(kaddr, kattr, from);
+		if (to < bytes)
+			memcpy(kaddr + to, kattr + to, bytes - to);
+
+		/* Zero the region outside the end of the attribute value. */
+		if (likely(bytes < PAGE_CACHE_SIZE))
+			memset(kaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
+
+		/*
+		 * The probability of not having done any of the above is
+		 * extremely small, so we just flush unconditionally.
+		 */
+		flush_dcache_page(page);
+		SetPageUptodate(page);
+	}
+	kunmap_atomic(kaddr, KM_USER0);
+
+	// TODO: Mark mft record dirty so it gets written back.
+	ntfs_error(vi->i_sb, "Writing to resident files is not supported yet. "
+			"Wrote to memory only...");
+
+	put_attr_search_ctx(ctx);
+	unmap_mft_record(base_ni);
+	ntfs_debug("Done.");
+	return 0;
+err_out:
+	if (err == -ENOMEM) {
+		ntfs_warning(vi->i_sb, "Error allocating memory required to "
+				"commit the write.");
+		if (PageUptodate(page)) {
+			ntfs_warning(vi->i_sb, "Page is uptodate, setting "
+					"dirty so the write will be retried "
+					"later on by the VM.");
+			/*
+			 * Put the page on mapping->dirty_pages, but leave its
+			 * buffer's dirty state as-is.
+			 */
+			__set_page_dirty_nobuffers(page);
+			err = 0;
+		} else
+			ntfs_error(vi->i_sb, "Page is not uptodate. Written "
+					"data has been lost. )-:");
+	} else {
+		ntfs_error(vi->i_sb, "Resident attribute write failed with "
+				"error %i. Setting page error flag.", -err);
+		SetPageError(page);
+	}
+	if (ctx)
+		put_attr_search_ctx(ctx);
+	if (m)
+		unmap_mft_record(base_ni);
+	return err;
+}
+
+#endif	/* NTFS_RW */
+
 /**
  * ntfs_aops - general address space operations for inodes and attributes
  */
@@ -442,5 +1773,11 @@ struct address_space_operations ntfs_aops = {
 	.readpage	= ntfs_readpage,	/* Fill page with data. */
 	.sync_page	= block_sync_page,	/* Currently, just unplugs the
 						   disk request queue. */
+#ifdef NTFS_RW
+	.writepage	= ntfs_writepage,	/* Write dirty page to disk. */
+	.prepare_write	= ntfs_prepare_write,	/* Prepare page and buffers
+						   ready to receive data. */
+	.commit_write	= ntfs_commit_write,	/* Commit received data. */
+#endif
 };
 

fs/ntfs/attrib.c

@@ -1182,8 +1182,9 @@ BOOL find_attr(const ATTR_TYPES type, const uchar_t *name, const u32 name_len,
 		else {
 			register int rc;
 			
-			rc = memcmp(val, (u8*)a +le16_to_cpu(a->_ARA(value_offset)),
-				min(val_len, le32_to_cpu(a->_ARA(value_length))));
+			rc = memcmp(val, (u8*)a + le16_to_cpu(
+					a->_ARA(value_offset)), min(val_len,
+					le32_to_cpu(a->_ARA(value_length))));
 			/*
 			 * If @val collates before the current attribute's
 			 * value, there is no matching attribute.
@@ -1676,7 +1677,7 @@ void reinit_attr_search_ctx(attr_search_context *ctx)
 		return;
 	} /* Attribute list. */
 	if (ctx->ntfs_ino != ctx->base_ntfs_ino)
-		unmap_mft_record(ctx->ntfs_ino);
+		unmap_extent_mft_record(ctx->ntfs_ino);
 	init_attr_search_ctx(ctx, ctx->base_ntfs_ino, ctx->base_mrec);
 	return;
 }
@@ -1709,7 +1710,7 @@ attr_search_context *get_attr_search_ctx(ntfs_inode *ni, MFT_RECORD *mrec)
 void put_attr_search_ctx(attr_search_context *ctx)
 {
 	if (ctx->base_ntfs_ino && ctx->ntfs_ino != ctx->base_ntfs_ino)
-		unmap_mft_record(ctx->ntfs_ino);
+		unmap_extent_mft_record(ctx->ntfs_ino);
 	kmem_cache_free(ntfs_attr_ctx_cache, ctx);
 	return;
 }

fs/ntfs/dir.c

@@ -1048,9 +1048,7 @@ static inline int ntfs_filldir(ntfs_volume *vol, loff_t *fpos,
 /*
  * VFS calls readdir without BKL but with i_sem held. This protects the VFS
  * parts (e.g. ->f_pos and ->i_size, and it also protects against directory
- * modifications). Together with the rw semaphore taken by the call to
- * map_mft_record(), the directory is truly locked down so we have a race free
- * ntfs_readdir() without the BKL. (-:
+ * modifications).
  *
  * We use the same basic approach as the old NTFS driver, i.e. we parse the
  * index root entries and then the index allocation entries that are marked

fs/ntfs/file.c

@@ -51,6 +51,9 @@ static int ntfs_file_open(struct inode *vi, struct file *filp)
 struct file_operations ntfs_file_ops = {
 	.llseek		= generic_file_llseek,	/* Seek inside file. */
 	.read		= generic_file_read,	/* Read from file. */
+#ifdef NTFS_RW
+	.write		= generic_file_write,	/* Write to a file. */
+#endif
 	.mmap		= generic_file_mmap,	/* Mmap file. */
 	.sendfile	= generic_file_sendfile,/* Zero-copy data send with the
 						   data source being on the
@@ -60,7 +63,12 @@ struct file_operations ntfs_file_ops = {
 	.open		= ntfs_file_open,	/* Open file. */
 };
 
-struct inode_operations ntfs_file_inode_ops = {};
+struct inode_operations ntfs_file_inode_ops = {
+#ifdef NTFS_RW
+	.truncate	= ntfs_truncate,
+	.setattr	= ntfs_setattr,
+#endif
+};
 
 struct file_operations ntfs_empty_file_ops = {};
 

fs/ntfs/inode.c

@@ -21,6 +21,8 @@
 
 #include <linux/pagemap.h>
 #include <linux/buffer_head.h>
+#include <linux/smp_lock.h>
+#include <linux/quotaops.h>
 
 #include "ntfs.h"
 #include "dir.h"
@@ -844,7 +846,7 @@ static int ntfs_read_locked_inode(struct inode *vi)
 				ctx->attr->_ANR(allocated_size));
 		/*
 		 * We are done with the mft record, so we release it. Otherwise
-		 *
+		 * we would deadlock in ntfs_attr_iget().
 		 */
 		put_attr_search_ctx(ctx);
 		unmap_mft_record(ni);
@@ -1926,3 +1928,96 @@ int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt)
 	return 0;
 }
 
+#ifdef NTFS_RW
+
+/**
+ * ntfs_truncate - called when the i_size of an ntfs inode is changed
+ * @vi:		inode for which the i_size was changed
+ *
+ * We don't support i_size changes yet.
+ *
+ * Called with ->i_sem held.
+ */
+void ntfs_truncate(struct inode *vi)
+{
+	// TODO: Implement...
+	ntfs_warning(vi->i_sb, "Eeek: i_size may have changed! If you see "
+			"this right after a message from "
+			"ntfs_{prepare,commit}_{,nonresident_}write() then "
+			"just ignore it. Otherwise it is bad news.");
+	// TODO: reset i_size now!
+	return;
+}
+
+/**
+ * ntfs_setattr - called from notify_change() when an attribute is being changed
+ * @dentry:	dentry whose attributes to change
+ * @attr:	structure describing the attributes and the changes
+ *
+ * We have to trap VFS attempts to truncate the file described by @dentry as
+ * soon as possible, because we do not implement changes in i_size yet. So we
+ * abort all i_size changes here.
+ *
+ * Called with ->i_sem held.
+ *
+ * Basically this is a copy of generic notify_change() and inode_setattr()
+ * functionality, except we intercept and abort changes in i_size.
+ */
+int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
+{
+	struct inode *vi;
+	int err;
+	unsigned int ia_valid = attr->ia_valid;
+
+	vi = dentry->d_inode;
+
+	err = inode_change_ok(vi, attr);
+	if (err)
+		return err;
+
+	if ((ia_valid & ATTR_UID && attr->ia_uid != vi->i_uid) ||
+			(ia_valid & ATTR_GID && attr->ia_gid != vi->i_gid)) {
+		err = DQUOT_TRANSFER(vi, attr) ? -EDQUOT : 0;
+		if (err)
+			return err;
+	}
+
+	lock_kernel();
+
+	if (ia_valid & ATTR_SIZE) {
+		ntfs_error(vi->i_sb, "Changes in i_size are not supported "
+				"yet. Sorry.");
+		// TODO: Implement...
+		// err = vmtruncate(vi, attr->ia_size);
+		err = -EOPNOTSUPP;
+		if (err)
+			goto trunc_err;
+	}
+
+	if (ia_valid & ATTR_UID)
+		vi->i_uid = attr->ia_uid;
+	if (ia_valid & ATTR_GID)
+		vi->i_gid = attr->ia_gid;
+	if (ia_valid & ATTR_ATIME)
+		vi->i_atime = attr->ia_atime;
+	if (ia_valid & ATTR_MTIME)
+		vi->i_mtime = attr->ia_mtime;
+	if (ia_valid & ATTR_CTIME)
+		vi->i_ctime = attr->ia_ctime;
+	if (ia_valid & ATTR_MODE) {
+		vi->i_mode = attr->ia_mode;
+		if (!in_group_p(vi->i_gid) &&
+				!capable(CAP_FSETID))
+			vi->i_mode &= ~S_ISGID;
+	}
+	mark_inode_dirty(vi);
+
+trunc_err:
+
+	unlock_kernel();
+
+	return err;
+}
+
+#endif
+

fs/ntfs/inode.h

@@ -36,8 +36,8 @@ typedef struct _ntfs_inode ntfs_inode;
  * fields already provided in the VFS inode.
  */
 struct _ntfs_inode {
-	s64 initialized_size;	/* Copy from $DATA/$INDEX_ALLOCATION. */
-	s64 allocated_size;	/* Copy from $DATA/$INDEX_ALLOCATION. */
+	s64 initialized_size;	/* Copy from the attribute record. */
+	s64 allocated_size;	/* Copy from the attribute record. */
 	unsigned long state;	/* NTFS specific flags describing this inode.
 				   See ntfs_inode_state_bits below. */
 	unsigned long mft_no;	/* Number of the mft record / inode. */
@@ -245,5 +245,13 @@ extern void ntfs_put_inode(struct inode *vi);
 
 extern int ntfs_show_options(struct seq_file *sf, struct vfsmount *mnt);
 
+#ifdef NTFS_RW
+
+extern void ntfs_truncate(struct inode *vi);
+
+extern int ntfs_setattr(struct dentry *dentry, struct iattr *attr);
+
+#endif
+
 #endif /* _LINUX_NTFS_FS_INODE_H */
 

fs/ntfs/mft.c

@@ -98,7 +98,7 @@ int format_mft_record(ntfs_inode *ni, MFT_RECORD *mft_rec)
 }
 
 /**
- * From fs/ntfs/aops.c
+ * ntfs_readpage - external declaration, function is in fs/ntfs/aops.c
  */
 extern int ntfs_readpage(struct file *, struct page *);
 
@@ -109,12 +109,9 @@ extern int ntfs_readpage(struct file *, struct page *);
  * ntfs_map_page() in map_mft_record_page().
  */
 struct address_space_operations ntfs_mft_aops = {
-	.writepage	= NULL,			/* Write dirty page to disk. */
 	.readpage	= ntfs_readpage,	/* Fill page with data. */
 	.sync_page	= block_sync_page,	/* Currently, just unplugs the
 						   disk request queue. */
-	.prepare_write	= NULL,			/* . */
-	.commit_write	= NULL,			/* . */
 };
 
 /**
@@ -176,8 +173,8 @@ static inline MFT_RECORD *map_mft_record_page(ntfs_inode *ni)
  * First, take the mrec_lock semaphore. We might now be sleeping, while waiting
  * for the semaphore if it was already locked by someone else.
  *
- * The page of the record is first mapped using map_mft_record_page() before
- * being returned to the caller.
+ * The page of the record is mapped using map_mft_record_page() before being
+ * returned to the caller.
  *
  * This in turn uses ntfs_map_page() to get the page containing the wanted mft
  * record (it in turn calls read_cache_page() which reads it in from disk if

fs/ntfs/mft.h

@@ -43,5 +43,19 @@ static inline void unmap_extent_mft_record(ntfs_inode *ni)
 	return;
 }
 
+/*
+ * flush_dcache_mft_record_page - flush_dcache_page() for mft records
+ * @ni:		ntfs inode structure of mft record
+ *
+ * Call flush_dcache_page() for the page in which an mft record resides.
+ *
+ * This must be called every time an mft record is modified, just after the
+ * modification.
+ */
+static inline void flush_dcache_mft_record_page(ntfs_inode *ni)
+{
+	flush_dcache_page(ni->page);
+}
+
 #endif /* _LINUX_NTFS_MFT_H */