NTFS: - Add disable_sparse mount option together with a per volume sparse

	enable bit which is set appropriately and a per inode sparse disable
	bit which is preset on some system file inodes as appropriate.
      - Enforce that sparse support is disabled on NTFS volumes pre 3.0.

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>

1 files changed, 4 insertions, 2 deletions

diff --git a/fs/ntfs/volume.h b/fs/ntfs/volume.h
index 4b97fa8635a8..62be73ad0156 100644
--- a/fs/ntfs/volume.h
+++ b/fs/ntfs/volume.h
@@ -2,7 +2,7 @@
  * volume.h - Defines for volume structures in NTFS Linux kernel driver. Part
  *            of the Linux-NTFS project.
  *
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2005 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
  *
  * This program/include file is free software; you can redistribute it and/or
@@ -54,7 +54,7 @@ typedef struct {
         mode_t dmask;                   /* The mask for directory
                                            permissions. */
         u8 mft_zone_multiplier;         /* Initial mft zone multiplier. */
-        u8 on_errors;                   /* What to do on file system errors. */
+        u8 on_errors;                   /* What to do on filesystem errors. */
         /* NTFS bootsector provided information. */
         u16 sector_size;                /* in bytes */
         u8 sector_size_bits;            /* log2(sector_size) */
@@ -141,6 +141,7 @@ typedef enum {
                                       file names in WIN32 namespace. */
         NV_LogFileEmpty,        /* 1: $LogFile journal is empty. */
         NV_QuotaOutOfDate,      /* 1: $Quota is out of date. */
+        NV_SparseEnabled,       /* 1: May create sparse files. */
 } ntfs_volume_flags;
 
 /*
@@ -167,5 +168,6 @@ NVOL_FNS(ShowSystemFiles)
 NVOL_FNS(CaseSensitive)
 NVOL_FNS(LogFileEmpty)
 NVOL_FNS(QuotaOutOfDate)
+NVOL_FNS(SparseEnabled)
 
 #endif /* _LINUX_NTFS_VOLUME_H */