--- /dev/null
+/*
+ * volume.h - Defines for volume structures in NTFS Linux kernel driver. Part
+ * of the Linux-NTFS project.
+ *
+ * Copyright (c) 2001-2006 Anton Altaparmakov
+ * Copyright (c) 2002 Richard Russon
+ *
+ * This program/include file is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program/include file is distributed in the hope that it will be
+ * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
+ * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (in the main directory of the Linux-NTFS
+ * distribution in the file COPYING); if not, write to the Free Software
+ * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifndef _LINUX_NTFS_VOLUME_H
+#define _LINUX_NTFS_VOLUME_H
+
+#include <linux/rwsem.h>
+#include <linux/uidgid.h>
+
+#include "types.h"
+#include "layout.h"
+
+/*
+ * The NTFS in memory super block structure.
+ */
+typedef struct {
+ /*
+ * FIXME: Reorder to have commonly used together element within the
+ * same cache line, aiming at a cache line size of 32 bytes. Aim for
+ * 64 bytes for less commonly used together elements. Put most commonly
+ * used elements to front of structure. Obviously do this only when the
+ * structure has stabilized... (AIA)
+ */
+ /* Device specifics. */
+ struct super_block *sb; /* Pointer back to the super_block. */
+ LCN nr_blocks; /* Number of sb->s_blocksize bytes
+ sized blocks on the device. */
+ /* Configuration provided by user at mount time. */
+ unsigned long flags; /* Miscellaneous flags, see below. */
+ kuid_t uid; /* uid that files will be mounted as. */
+ kgid_t gid; /* gid that files will be mounted as. */
+ umode_t fmask; /* The mask for file permissions. */
+ umode_t dmask; /* The mask for directory
+ permissions. */
+ u8 mft_zone_multiplier; /* Initial mft zone multiplier. */
+ 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) */
+ u32 cluster_size; /* in bytes */
+ u32 cluster_size_mask; /* cluster_size - 1 */
+ u8 cluster_size_bits; /* log2(cluster_size) */
+ u32 mft_record_size; /* in bytes */
+ u32 mft_record_size_mask; /* mft_record_size - 1 */
+ u8 mft_record_size_bits; /* log2(mft_record_size) */
+ u32 index_record_size; /* in bytes */
+ u32 index_record_size_mask; /* index_record_size - 1 */
+ u8 index_record_size_bits; /* log2(index_record_size) */
+ LCN nr_clusters; /* Volume size in clusters == number of
+ bits in lcn bitmap. */
+ LCN mft_lcn; /* Cluster location of mft data. */
+ LCN mftmirr_lcn; /* Cluster location of copy of mft. */
+ u64 serial_no; /* The volume serial number. */
+ /* Mount specific NTFS information. */
+ u32 upcase_len; /* Number of entries in upcase[]. */
+ ntfschar *upcase; /* The upcase table. */
+
+ s32 attrdef_size; /* Size of the attribute definition
+ table in bytes. */
+ ATTR_DEF *attrdef; /* Table of attribute definitions.
+ Obtained from FILE_AttrDef. */
+
+#ifdef NTFS_RW
+ /* Variables used by the cluster and mft allocators. */
+ s64 mft_data_pos; /* Mft record number at which to
+ allocate the next mft record. */
+ LCN mft_zone_start; /* First cluster of the mft zone. */
+ LCN mft_zone_end; /* First cluster beyond the mft zone. */
+ LCN mft_zone_pos; /* Current position in the mft zone. */
+ LCN data1_zone_pos; /* Current position in the first data
+ zone. */
+ LCN data2_zone_pos; /* Current position in the second data
+ zone. */
+#endif /* NTFS_RW */
+
+ struct inode *mft_ino; /* The VFS inode of $MFT. */
+
+ struct inode *mftbmp_ino; /* Attribute inode for $MFT/$BITMAP. */
+ struct rw_semaphore mftbmp_lock; /* Lock for serializing accesses to the
+ mft record bitmap ($MFT/$BITMAP). */
+#ifdef NTFS_RW
+ struct inode *mftmirr_ino; /* The VFS inode of $MFTMirr. */
+ int mftmirr_size; /* Size of mft mirror in mft records. */
+
+ struct inode *logfile_ino; /* The VFS inode of $LogFile. */
+#endif /* NTFS_RW */
+
+ struct inode *lcnbmp_ino; /* The VFS inode of $Bitmap. */
+ struct rw_semaphore lcnbmp_lock; /* Lock for serializing accesses to the
+ cluster bitmap ($Bitmap/$DATA). */
+
+ struct inode *vol_ino; /* The VFS inode of $Volume. */
+ VOLUME_FLAGS vol_flags; /* Volume flags. */
+ u8 major_ver; /* Ntfs major version of volume. */
+ u8 minor_ver; /* Ntfs minor version of volume. */
+
+ struct inode *root_ino; /* The VFS inode of the root
+ directory. */
+ struct inode *secure_ino; /* The VFS inode of $Secure (NTFS3.0+
+ only, otherwise NULL). */
+ struct inode *extend_ino; /* The VFS inode of $Extend (NTFS3.0+
+ only, otherwise NULL). */
+#ifdef NTFS_RW
+ /* $Quota stuff is NTFS3.0+ specific. Unused/NULL otherwise. */
+ struct inode *quota_ino; /* The VFS inode of $Quota. */
+ struct inode *quota_q_ino; /* Attribute inode for $Quota/$Q. */
+ /* $UsnJrnl stuff is NTFS3.0+ specific. Unused/NULL otherwise. */
+ struct inode *usnjrnl_ino; /* The VFS inode of $UsnJrnl. */
+ struct inode *usnjrnl_max_ino; /* Attribute inode for $UsnJrnl/$Max. */
+ struct inode *usnjrnl_j_ino; /* Attribute inode for $UsnJrnl/$J. */
+#endif /* NTFS_RW */
+ struct nls_table *nls_map;
+} ntfs_volume;
+
+/*
+ * Defined bits for the flags field in the ntfs_volume structure.
+ */
+typedef enum {
+ NV_Errors, /* 1: Volume has errors, prevent remount rw. */
+ NV_ShowSystemFiles, /* 1: Return system files in ntfs_readdir(). */
+ NV_CaseSensitive, /* 1: Treat file names as case sensitive and
+ create filenames in the POSIX namespace.
+ Otherwise be case insensitive but still
+ create file names in POSIX namespace. */
+ NV_LogFileEmpty, /* 1: $LogFile journal is empty. */
+ NV_QuotaOutOfDate, /* 1: $Quota is out of date. */
+ NV_UsnJrnlStamped, /* 1: $UsnJrnl has been stamped. */
+ NV_SparseEnabled, /* 1: May create sparse files. */
+} ntfs_volume_flags;
+
+/*
+ * Macro tricks to expand the NVolFoo(), NVolSetFoo(), and NVolClearFoo()
+ * functions.
+ */
+#define DEFINE_NVOL_BIT_OPS(flag) \
+static inline int NVol##flag(ntfs_volume *vol) \
+{ \
+ return test_bit(NV_##flag, &(vol)->flags); \
+} \
+static inline void NVolSet##flag(ntfs_volume *vol) \
+{ \
+ set_bit(NV_##flag, &(vol)->flags); \
+} \
+static inline void NVolClear##flag(ntfs_volume *vol) \
+{ \
+ clear_bit(NV_##flag, &(vol)->flags); \
+}
+
+/* Emit the ntfs volume bitops functions. */
+DEFINE_NVOL_BIT_OPS(Errors)
+DEFINE_NVOL_BIT_OPS(ShowSystemFiles)
+DEFINE_NVOL_BIT_OPS(CaseSensitive)
+DEFINE_NVOL_BIT_OPS(LogFileEmpty)
+DEFINE_NVOL_BIT_OPS(QuotaOutOfDate)
+DEFINE_NVOL_BIT_OPS(UsnJrnlStamped)
+DEFINE_NVOL_BIT_OPS(SparseEnabled)
+
+#endif /* _LINUX_NTFS_VOLUME_H */
Code Review / kvmfornfv.git / blobdiff