1 files changed, 565 insertions, 157 deletions

diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index 212a3d0f2073..453d0d51ea4b 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -1,7 +1,7 @@
 /*
  * super.c - NTFS kernel super block handling. Part of the Linux-NTFS project.
  *
- * Copyright (c) 2001-2004 Anton Altaparmakov
+ * Copyright (c) 2001-2005 Anton Altaparmakov
  * Copyright (c) 2001,2002 Richard Russon
  *
  * This program/include file is free software; you can redistribute it and/or
@@ -34,14 +34,16 @@
 #include "sysctl.h"
 #include "logfile.h"
 #include "quota.h"
+#include "usnjrnl.h"
 #include "dir.h"
 #include "debug.h"
 #include "index.h"
 #include "aops.h"
+#include "layout.h"
 #include "malloc.h"
 #include "ntfs.h"
 
-/* Number of mounted file systems which have compression enabled. */
+/* Number of mounted filesystems which have compression enabled. */
 static unsigned long ntfs_nr_compression_users;
 
 /* A global default upcase table and a corresponding reference count. */
@@ -102,7 +104,7 @@ static BOOL parse_options(ntfs_volume *vol, char *opt)
         gid_t gid = (gid_t)-1;
         mode_t fmask = (mode_t)-1, dmask = (mode_t)-1;
         int mft_zone_multiplier = -1, on_errors = -1;
-        int show_sys_files = -1, case_sensitive = -1;
+        int show_sys_files = -1, case_sensitive = -1, disable_sparse = -1;
         struct nls_table *nls_map = NULL, *old_nls;
 
         /* I am lazy... (-8 */
@@ -124,6 +126,14 @@ static BOOL parse_options(ntfs_volume *vol, char *opt)
                 if (*v)                                                 \
                         goto needs_val;                                 \
         }
+#define NTFS_GETOPT_OCTAL(option, variable)                             \
+        if (!strcmp(p, option)) {                                       \
+                if (!v || !*v)                                          \
+                        goto needs_arg;                                 \
+                variable = simple_strtoul(ov = v, &v, 8);               \
+                if (*v)                                                 \
+                        goto needs_val;                                 \
+        }
 #define NTFS_GETOPT_BOOL(option, variable)                              \
         if (!strcmp(p, option)) {                                       \
                 BOOL val;                                               \
@@ -155,13 +165,14 @@ static BOOL parse_options(ntfs_volume *vol, char *opt)
                         *v++ = 0;
                 NTFS_GETOPT("uid", uid)
                 else NTFS_GETOPT("gid", gid)
-                else NTFS_GETOPT("umask", fmask = dmask)
-                else NTFS_GETOPT("fmask", fmask)
-                else NTFS_GETOPT("dmask", dmask)
+                else NTFS_GETOPT_OCTAL("umask", fmask = dmask)
+                else NTFS_GETOPT_OCTAL("fmask", fmask)
+                else NTFS_GETOPT_OCTAL("dmask", dmask)
                 else NTFS_GETOPT("mft_zone_multiplier", mft_zone_multiplier)
                 else NTFS_GETOPT_WITH_DEFAULT("sloppy", sloppy, TRUE)
                 else NTFS_GETOPT_BOOL("show_sys_files", show_sys_files)
                 else NTFS_GETOPT_BOOL("case_sensitive", case_sensitive)
+                else NTFS_GETOPT_BOOL("disable_sparse", disable_sparse)
                 else NTFS_GETOPT_OPTIONS_ARRAY("errors", on_errors,
                                 on_errors_arr)
                 else if (!strcmp(p, "posix") || !strcmp(p, "show_inodes"))
@@ -291,6 +302,21 @@ no_mount_options:
                 else
                         NVolClearCaseSensitive(vol);
         }
+        if (disable_sparse != -1) {
+                if (disable_sparse)
+                        NVolClearSparseEnabled(vol);
+                else {
+                        if (!NVolSparseEnabled(vol) &&
+                                        vol->major_ver && vol->major_ver < 3)
+                                ntfs_warning(vol->sb, "Not enabling sparse "
+                                                "support due to NTFS volume "
+                                                "version %i.%i (need at least "
+                                                "version 3.0).", vol->major_ver,
+                                                vol->minor_ver);
+                        else
+                                NVolSetSparseEnabled(vol);
+                }
+        }
         return TRUE;
 needs_arg:
         ntfs_error(vol->sb, "The %s option requires an argument.", p);
@@ -480,6 +506,12 @@ static int ntfs_remount(struct super_block *sb, int *flags, char *opt)
                         NVolSetErrors(vol);
                         return -EROFS;
                 }
+                if (!ntfs_stamp_usnjrnl(vol)) {
+                        ntfs_error(sb, "Failed to stamp transation log "
+                                        "($UsnJrnl)%s", es);
+                        NVolSetErrors(vol);
+                        return -EROFS;
+                }
         } else if (!(sb->s_flags & MS_RDONLY) && (*flags & MS_RDONLY)) {
                 /* Remounting read-only. */
                 if (!NVolErrors(vol)) {
@@ -516,16 +548,19 @@ static BOOL is_boot_sector_ntfs(const struct super_block *sb,
 {
         /*
          * Check that checksum == sum of u32 values from b to the checksum
-         * field. If checksum is zero, no checking is done.
+         * field.  If checksum is zero, no checking is done.  We will work when
+         * the checksum test fails, since some utilities update the boot sector
+         * ignoring the checksum which leaves the checksum out-of-date.  We
+         * report a warning if this is the case.
          */
-        if ((void*)b < (void*)&b->checksum && b->checksum) {
+        if ((void*)b < (void*)&b->checksum && b->checksum && !silent) {
                 le32 *u;
                 u32 i;
 
                 for (i = 0, u = (le32*)b; u < (le32*)(&b->checksum); ++u)
                         i += le32_to_cpup(u);
                 if (le32_to_cpu(b->checksum) != i)
-                        goto not_ntfs;
+                        ntfs_warning(sb, "Invalid boot sector checksum.");
         }
         /* Check OEMidentifier is "NTFS    " */
         if (b->oem_id != magicNTFS)
@@ -541,9 +576,9 @@ static BOOL is_boot_sector_ntfs(const struct super_block *sb,
         default:
                 goto not_ntfs;
         }
-        /* Check the cluster size is not above 65536 bytes. */
+        /* Check the cluster size is not above the maximum (64kiB). */
         if ((u32)le16_to_cpu(b->bpb.bytes_per_sector) *
-                        b->bpb.sectors_per_cluster > 0x10000)
+                        b->bpb.sectors_per_cluster > NTFS_MAX_CLUSTER_SIZE)
                 goto not_ntfs;
         /* Check reserved/unused fields are really zero. */
         if (le16_to_cpu(b->bpb.reserved_sectors) ||
@@ -575,7 +610,7 @@ static BOOL is_boot_sector_ntfs(const struct super_block *sb,
          * many BIOSes will refuse to boot from a bootsector if the magic is
          * incorrect, so we emit a warning.
          */
-        if (!silent && b->end_of_sector_marker != cpu_to_le16(0xaa55))
+        if (!silent && b->end_of_sector_marker != const_cpu_to_le16(0xaa55))
                 ntfs_warning(sb, "Invalid end of sector marker.");
         return TRUE;
 not_ntfs:
@@ -967,6 +1002,7 @@ static BOOL load_and_init_mft_mirror(ntfs_volume *vol)
         tmp_ni = NTFS_I(tmp_ino);
         /* The $MFTMirr, like the $MFT is multi sector transfer protected. */
         NInoSetMstProtected(tmp_ni);
+        NInoSetSparseDisabled(tmp_ni);
         /*
          * Set up our little cheat allowing us to reuse the async read io
          * completion handler for directories.
@@ -990,12 +1026,12 @@ static BOOL load_and_init_mft_mirror(ntfs_volume *vol)
  */
 static BOOL check_mft_mirror(ntfs_volume *vol)
 {
-        unsigned long index;
         struct super_block *sb = vol->sb;
         ntfs_inode *mirr_ni;
         struct page *mft_page, *mirr_page;
         u8 *kmft, *kmirr;
         runlist_element *rl, rl2[2];
+        pgoff_t index;
         int mrecs_per_page, i;
 
         ntfs_debug("Entering.");
@@ -1105,7 +1141,8 @@ mft_unmap_out:
  *
  * Return TRUE on success or FALSE on error.
  */
-static BOOL load_and_check_logfile(ntfs_volume *vol)
+static BOOL load_and_check_logfile(ntfs_volume *vol,
+                RESTART_PAGE_HEADER **rp)
 {
         struct inode *tmp_ino;
 
@@ -1117,16 +1154,135 @@ static BOOL load_and_check_logfile(ntfs_volume *vol)
                 /* Caller will display error message. */
                 return FALSE;
         }
-        if (!ntfs_check_logfile(tmp_ino)) {
+        if (!ntfs_check_logfile(tmp_ino, rp)) {
                 iput(tmp_ino);
                 /* ntfs_check_logfile() will have displayed error output. */
                 return FALSE;
         }
+        NInoSetSparseDisabled(NTFS_I(tmp_ino));
         vol->logfile_ino = tmp_ino;
         ntfs_debug("Done.");
         return TRUE;
 }
 
+#define NTFS_HIBERFIL_HEADER_SIZE       4096
+
+/**
+ * check_windows_hibernation_status - check if Windows is suspended on a volume
+ * @vol:        ntfs super block of device to check
+ *
+ * Check if Windows is hibernated on the ntfs volume @vol.  This is done by
+ * looking for the file hiberfil.sys in the root directory of the volume.  If
+ * the file is not present Windows is definitely not suspended.
+ *
+ * If hiberfil.sys exists and is less than 4kiB in size it means Windows is
+ * definitely suspended (this volume is not the system volume).  Caveat:  on a
+ * system with many volumes it is possible that the < 4kiB check is bogus but
+ * for now this should do fine.
+ *
+ * If hiberfil.sys exists and is larger than 4kiB in size, we need to read the
+ * hiberfil header (which is the first 4kiB).  If this begins with "hibr",
+ * Windows is definitely suspended.  If it is completely full of zeroes,
+ * Windows is definitely not hibernated.  Any other case is treated as if
+ * Windows is suspended.  This caters for the above mentioned caveat of a
+ * system with many volumes where no "hibr" magic would be present and there is
+ * no zero header.
+ *
+ * Return 0 if Windows is not hibernated on the volume, >0 if Windows is
+ * hibernated on the volume, and -errno on error.
+ */
+static int check_windows_hibernation_status(ntfs_volume *vol)
+{
+        MFT_REF mref;
+        struct inode *vi;
+        ntfs_inode *ni;
+        struct page *page;
+        u32 *kaddr, *kend;
+        ntfs_name *name = NULL;
+        int ret = 1;
+        static const ntfschar hiberfil[13] = { const_cpu_to_le16('h'),
+                        const_cpu_to_le16('i'), const_cpu_to_le16('b'),
+                        const_cpu_to_le16('e'), const_cpu_to_le16('r'),
+                        const_cpu_to_le16('f'), const_cpu_to_le16('i'),
+                        const_cpu_to_le16('l'), const_cpu_to_le16('.'),
+                        const_cpu_to_le16('s'), const_cpu_to_le16('y'),
+                        const_cpu_to_le16('s'), 0 };
+
+        ntfs_debug("Entering.");
+        /*
+         * Find the inode number for the hibernation file by looking up the
+         * filename hiberfil.sys in the root directory.
+         */
+        down(&vol->root_ino->i_sem);
+        mref = ntfs_lookup_inode_by_name(NTFS_I(vol->root_ino), hiberfil, 12,
+                        &name);
+        up(&vol->root_ino->i_sem);
+        if (IS_ERR_MREF(mref)) {
+                ret = MREF_ERR(mref);
+                /* If the file does not exist, Windows is not hibernated. */
+                if (ret == -ENOENT) {
+                        ntfs_debug("hiberfil.sys not present.  Windows is not "
+                                        "hibernated on the volume.");
+                        return 0;
+                }
+                /* A real error occured. */
+                ntfs_error(vol->sb, "Failed to find inode number for "
+                                "hiberfil.sys.");
+                return ret;
+        }
+        /* We do not care for the type of match that was found. */
+        kfree(name);
+        /* Get the inode. */
+        vi = ntfs_iget(vol->sb, MREF(mref));
+        if (IS_ERR(vi) || is_bad_inode(vi)) {
+                if (!IS_ERR(vi))
+                        iput(vi);
+                ntfs_error(vol->sb, "Failed to load hiberfil.sys.");
+                return IS_ERR(vi) ? PTR_ERR(vi) : -EIO;
+        }
+        if (unlikely(i_size_read(vi) < NTFS_HIBERFIL_HEADER_SIZE)) {
+                ntfs_debug("hiberfil.sys is smaller than 4kiB (0x%llx).  "
+                                "Windows is hibernated on the volume.  This "
+                                "is not the system volume.", i_size_read(vi));
+                goto iput_out;
+        }
+        ni = NTFS_I(vi);
+        page = ntfs_map_page(vi->i_mapping, 0);
+        if (IS_ERR(page)) {
+                ntfs_error(vol->sb, "Failed to read from hiberfil.sys.");
+                ret = PTR_ERR(page);
+                goto iput_out;
+        }
+        kaddr = (u32*)page_address(page);
+        if (*(le32*)kaddr == const_cpu_to_le32(0x72626968)/*'hibr'*/) {
+                ntfs_debug("Magic \"hibr\" found in hiberfil.sys.  Windows is "
+                                "hibernated on the volume.  This is the "
+                                "system volume.");
+                goto unm_iput_out;
+        }
+        kend = kaddr + NTFS_HIBERFIL_HEADER_SIZE/sizeof(*kaddr);
+        do {
+                if (unlikely(*kaddr)) {
+                        ntfs_debug("hiberfil.sys is larger than 4kiB "
+                                        "(0x%llx), does not contain the "
+                                        "\"hibr\" magic, and does not have a "
+                                        "zero header.  Windows is hibernated "
+                                        "on the volume.  This is not the "
+                                        "system volume.", i_size_read(vi));
+                        goto unm_iput_out;
+                }
+        } while (++kaddr < kend);
+        ntfs_debug("hiberfil.sys contains a zero header.  Windows is not "
+                        "hibernated on the volume.  This is the system "
+                        "volume.");
+        ret = 0;
+unm_iput_out:
+        ntfs_unmap_page(page);
+iput_out:
+        iput(vi);
+        return ret;
+}
+
 /**
  * load_and_init_quota - load and setup the quota file for a volume if present
  * @vol:        ntfs super block describing device whose quota file to load
@@ -1175,8 +1331,7 @@ static BOOL load_and_init_quota(ntfs_volume *vol)
                 return FALSE;
         }
         /* We do not care for the type of match that was found. */
-        if (name)
-                kfree(name);
+        kfree(name);
         /* Get the inode. */
         tmp_ino = ntfs_iget(vol->sb, MREF(mref));
         if (IS_ERR(tmp_ino) || is_bad_inode(tmp_ino)) {
@@ -1198,6 +1353,167 @@ static BOOL load_and_init_quota(ntfs_volume *vol)
 }
 
 /**
+ * load_and_init_usnjrnl - load and setup the transaction log if present
+ * @vol:        ntfs super block describing device whose usnjrnl file to load
+ *
+ * Return TRUE on success or FALSE on error.
+ *
+ * If $UsnJrnl is not present or in the process of being disabled, we set
+ * NVolUsnJrnlStamped() and return success.
+ *
+ * If the $UsnJrnl $DATA/$J attribute has a size equal to the lowest valid usn,
+ * i.e. transaction logging has only just been enabled or the journal has been
+ * stamped and nothing has been logged since, we also set NVolUsnJrnlStamped()
+ * and return success.
+ */
+static BOOL load_and_init_usnjrnl(ntfs_volume *vol)
+{
+        MFT_REF mref;
+        struct inode *tmp_ino;
+        ntfs_inode *tmp_ni;
+        struct page *page;
+        ntfs_name *name = NULL;
+        USN_HEADER *uh;
+        static const ntfschar UsnJrnl[9] = { const_cpu_to_le16('$'),
+                        const_cpu_to_le16('U'), const_cpu_to_le16('s'),
+                        const_cpu_to_le16('n'), const_cpu_to_le16('J'),
+                        const_cpu_to_le16('r'), const_cpu_to_le16('n'),
+                        const_cpu_to_le16('l'), 0 };
+        static ntfschar Max[5] = { const_cpu_to_le16('$'),
+                        const_cpu_to_le16('M'), const_cpu_to_le16('a'),
+                        const_cpu_to_le16('x'), 0 };
+        static ntfschar J[3] = { const_cpu_to_le16('$'),
+                        const_cpu_to_le16('J'), 0 };
+
+        ntfs_debug("Entering.");
+        /*
+         * Find the inode number for the transaction log file by looking up the
+         * filename $UsnJrnl in the extended system files directory $Extend.
+         */
+        down(&vol->extend_ino->i_sem);
+        mref = ntfs_lookup_inode_by_name(NTFS_I(vol->extend_ino), UsnJrnl, 8,
+                        &name);
+        up(&vol->extend_ino->i_sem);
+        if (IS_ERR_MREF(mref)) {
+                /*
+                 * If the file does not exist, transaction logging is disabled,
+                 * just return success.
+                 */
+                if (MREF_ERR(mref) == -ENOENT) {
+                        ntfs_debug("$UsnJrnl not present.  Volume does not "
+                                        "have transaction logging enabled.");
+not_enabled:
+                        /*
+                         * No need to try to stamp the transaction log if
+                         * transaction logging is not enabled.
+                         */
+                        NVolSetUsnJrnlStamped(vol);
+                        return TRUE;
+                }
+                /* A real error occured. */
+                ntfs_error(vol->sb, "Failed to find inode number for "
+                                "$UsnJrnl.");
+                return FALSE;
+        }
+        /* We do not care for the type of match that was found. */
+        kfree(name);
+        /* Get the inode. */
+        tmp_ino = ntfs_iget(vol->sb, MREF(mref));
+        if (unlikely(IS_ERR(tmp_ino) || is_bad_inode(tmp_ino))) {
+                if (!IS_ERR(tmp_ino))
+                        iput(tmp_ino);
+                ntfs_error(vol->sb, "Failed to load $UsnJrnl.");
+                return FALSE;
+        }
+        vol->usnjrnl_ino = tmp_ino;
+        /*
+         * If the transaction log is in the process of being deleted, we can
+         * ignore it.
+         */
+        if (unlikely(vol->vol_flags & VOLUME_DELETE_USN_UNDERWAY)) {
+                ntfs_debug("$UsnJrnl in the process of being disabled.  "
+                                "Volume does not have transaction logging "
+                                "enabled.");
+                goto not_enabled;
+        }
+        /* Get the $DATA/$Max attribute. */
+        tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, Max, 4);
+        if (IS_ERR(tmp_ino)) {
+                ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$Max "
+                                "attribute.");
+                return FALSE;
+        }
+        vol->usnjrnl_max_ino = tmp_ino;
+        if (unlikely(i_size_read(tmp_ino) < sizeof(USN_HEADER))) {
+                ntfs_error(vol->sb, "Found corrupt $UsnJrnl/$DATA/$Max "
+                                "attribute (size is 0x%llx but should be at "
+                                "least 0x%x bytes).", i_size_read(tmp_ino),
+                                sizeof(USN_HEADER));
+                return FALSE;
+        }
+        /* Get the $DATA/$J attribute. */
+        tmp_ino = ntfs_attr_iget(vol->usnjrnl_ino, AT_DATA, J, 2);
+        if (IS_ERR(tmp_ino)) {
+                ntfs_error(vol->sb, "Failed to load $UsnJrnl/$DATA/$J "
+                                "attribute.");
+                return FALSE;
+        }
+        vol->usnjrnl_j_ino = tmp_ino;
+        /* Verify $J is non-resident and sparse. */
+        tmp_ni = NTFS_I(vol->usnjrnl_j_ino);
+        if (unlikely(!NInoNonResident(tmp_ni) || !NInoSparse(tmp_ni))) {
+                ntfs_error(vol->sb, "$UsnJrnl/$DATA/$J attribute is resident "
+                                "and/or not sparse.");
+                return FALSE;
+        }
+        /* Read the USN_HEADER from $DATA/$Max. */
+        page = ntfs_map_page(vol->usnjrnl_max_ino->i_mapping, 0);
+        if (IS_ERR(page)) {
+                ntfs_error(vol->sb, "Failed to read from $UsnJrnl/$DATA/$Max "
+                                "attribute.");
+                return FALSE;
+        }
+        uh = (USN_HEADER*)page_address(page);
+        /* Sanity check the $Max. */
+        if (unlikely(sle64_to_cpu(uh->allocation_delta) >
+                        sle64_to_cpu(uh->maximum_size))) {
+                ntfs_error(vol->sb, "Allocation delta (0x%llx) exceeds "
+                                "maximum size (0x%llx).  $UsnJrnl is corrupt.",
+                                (long long)sle64_to_cpu(uh->allocation_delta),
+                                (long long)sle64_to_cpu(uh->maximum_size));
+                ntfs_unmap_page(page);
+                return FALSE;
+        }
+        /*
+         * If the transaction log has been stamped and nothing has been written
+         * to it since, we do not need to stamp it.
+         */
+        if (unlikely(sle64_to_cpu(uh->lowest_valid_usn) >=
+                        i_size_read(vol->usnjrnl_j_ino))) {
+                if (likely(sle64_to_cpu(uh->lowest_valid_usn) ==
+                                i_size_read(vol->usnjrnl_j_ino))) {
+                        ntfs_unmap_page(page);
+                        ntfs_debug("$UsnJrnl is enabled but nothing has been "
+                                        "logged since it was last stamped.  "
+                                        "Treating this as if the volume does "
+                                        "not have transaction logging "
+                                        "enabled.");
+                        goto not_enabled;
+                }
+                ntfs_error(vol->sb, "$UsnJrnl has lowest valid usn (0x%llx) "
+                                "which is out of bounds (0x%llx).  $UsnJrnl "
+                                "is corrupt.",
+                                (long long)sle64_to_cpu(uh->lowest_valid_usn),
+                                i_size_read(vol->usnjrnl_j_ino));
+                ntfs_unmap_page(page);
+                return FALSE;
+        }
+        ntfs_unmap_page(page);
+        ntfs_debug("Done.");
+        return TRUE;
+}
+
+/**
  * load_and_init_attrdef - load the attribute definitions table for a volume
  * @vol:        ntfs super block describing device whose attrdef to load
  *
@@ -1205,10 +1521,11 @@ static BOOL load_and_init_quota(ntfs_volume *vol)
  */
 static BOOL load_and_init_attrdef(ntfs_volume *vol)
 {
+        loff_t i_size;
         struct super_block *sb = vol->sb;
         struct inode *ino;
         struct page *page;
-        unsigned long index, max_index;
+        pgoff_t index, max_index;
         unsigned int size;
 
         ntfs_debug("Entering.");
@@ -1219,14 +1536,16 @@ static BOOL load_and_init_attrdef(ntfs_volume *vol)
                         iput(ino);
                 goto failed;
         }
+        NInoSetSparseDisabled(NTFS_I(ino));
         /* The size of FILE_AttrDef must be above 0 and fit inside 31 bits. */
-        if (!ino->i_size || ino->i_size > 0x7fffffff)
+        i_size = i_size_read(ino);
+        if (i_size <= 0 || i_size > 0x7fffffff)
                 goto iput_failed;
-        vol->attrdef = (ATTR_DEF*)ntfs_malloc_nofs(ino->i_size);
+        vol->attrdef = (ATTR_DEF*)ntfs_malloc_nofs(i_size);
         if (!vol->attrdef)
                 goto iput_failed;
         index = 0;
-        max_index = ino->i_size >> PAGE_CACHE_SHIFT;
+        max_index = i_size >> PAGE_CACHE_SHIFT;
         size = PAGE_CACHE_SIZE;
         while (index < max_index) {
                 /* Read the attrdef table and copy it into the linear buffer. */
@@ -1239,12 +1558,12 @@ read_partial_attrdef_page:
                 ntfs_unmap_page(page);
         };
         if (size == PAGE_CACHE_SIZE) {
-                size = ino->i_size & ~PAGE_CACHE_MASK;
+                size = i_size & ~PAGE_CACHE_MASK;
                 if (size)
                         goto read_partial_attrdef_page;
         }
-        vol->attrdef_size = ino->i_size;
-        ntfs_debug("Read %llu bytes from $AttrDef.", ino->i_size);
+        vol->attrdef_size = i_size;
+        ntfs_debug("Read %llu bytes from $AttrDef.", i_size);
         iput(ino);
         return TRUE;
 free_iput_failed:
@@ -1267,10 +1586,11 @@ failed:
  */
 static BOOL load_and_init_upcase(ntfs_volume *vol)
 {
+        loff_t i_size;
         struct super_block *sb = vol->sb;
         struct inode *ino;
         struct page *page;
-        unsigned long index, max_index;
+        pgoff_t index, max_index;
         unsigned int size;
         int i, max;
 
@@ -1286,14 +1606,15 @@ static BOOL load_and_init_upcase(ntfs_volume *vol)
          * The upcase size must not be above 64k Unicode characters, must not
          * be zero and must be a multiple of sizeof(ntfschar).
          */
-        if (!ino->i_size || ino->i_size & (sizeof(ntfschar) - 1) ||
-                        ino->i_size > 64ULL * 1024 * sizeof(ntfschar))
+        i_size = i_size_read(ino);
+        if (!i_size || i_size & (sizeof(ntfschar) - 1) ||
+                        i_size > 64ULL * 1024 * sizeof(ntfschar))
                 goto iput_upcase_failed;
-        vol->upcase = (ntfschar*)ntfs_malloc_nofs(ino->i_size);
+        vol->upcase = (ntfschar*)ntfs_malloc_nofs(i_size);
         if (!vol->upcase)
                 goto iput_upcase_failed;
         index = 0;
-        max_index = ino->i_size >> PAGE_CACHE_SHIFT;
+        max_index = i_size >> PAGE_CACHE_SHIFT;
         size = PAGE_CACHE_SIZE;
         while (index < max_index) {
                 /* Read the upcase table and copy it into the linear buffer. */
@@ -1306,13 +1627,13 @@ read_partial_upcase_page:
                 ntfs_unmap_page(page);
         };
         if (size == PAGE_CACHE_SIZE) {
-                size = ino->i_size & ~PAGE_CACHE_MASK;
+                size = i_size & ~PAGE_CACHE_MASK;
                 if (size)
                         goto read_partial_upcase_page;
         }
-        vol->upcase_len = ino->i_size >> UCHAR_T_SIZE_BITS;
+        vol->upcase_len = i_size >> UCHAR_T_SIZE_BITS;
         ntfs_debug("Read %llu bytes from $UpCase (expected %zu bytes).",
-                        ino->i_size, 64 * 1024 * sizeof(ntfschar));
+                        i_size, 64 * 1024 * sizeof(ntfschar));
         iput(ino);
         down(&ntfs_lock);
         if (!default_upcase) {
@@ -1376,6 +1697,10 @@ static BOOL load_system_files(ntfs_volume *vol)
         MFT_RECORD *m;
         VOLUME_INFORMATION *vi;
         ntfs_attr_search_ctx *ctx;
+#ifdef NTFS_RW
+        RESTART_PAGE_HEADER *rp;
+        int err;
+#endif /* NTFS_RW */
 
         ntfs_debug("Entering.");
 #ifdef NTFS_RW
@@ -1435,7 +1760,8 @@ static BOOL load_system_files(ntfs_volume *vol)
                         iput(vol->lcnbmp_ino);
                 goto bitmap_failed;
         }
-        if ((vol->nr_clusters + 7) >> 3 > vol->lcnbmp_ino->i_size) {
+        NInoSetSparseDisabled(NTFS_I(vol->lcnbmp_ino));
+        if ((vol->nr_clusters + 7) >> 3 > i_size_read(vol->lcnbmp_ino)) {
                 iput(vol->lcnbmp_ino);
 bitmap_failed:
                 ntfs_error(sb, "Failed to load $Bitmap.");
@@ -1486,6 +1812,12 @@ get_ctx_vol_failed:
         unmap_mft_record(NTFS_I(vol->vol_ino));
         printk(KERN_INFO "NTFS volume version %i.%i.\n", vol->major_ver,
                         vol->minor_ver);
+        if (vol->major_ver < 3 && NVolSparseEnabled(vol)) {
+                ntfs_warning(vol->sb, "Disabling sparse support due to NTFS "
+                                "volume version %i.%i (need at least version "
+                                "3.0).", vol->major_ver, vol->minor_ver);
+                NVolClearSparseEnabled(vol);
+        }
 #ifdef NTFS_RW
         /* Make sure that no unsupported volume flags are set. */
         if (vol->vol_flags & VOLUME_MUST_MOUNT_RO_MASK) {
@@ -1519,8 +1851,9 @@ get_ctx_vol_failed:
          * Get the inode for the logfile, check it and determine if the volume
          * was shutdown cleanly.
          */
-        if (!load_and_check_logfile(vol) ||
-                        !ntfs_is_logfile_clean(vol->logfile_ino)) {
+        rp = NULL;
+        if (!load_and_check_logfile(vol, &rp) ||
+                        !ntfs_is_logfile_clean(vol->logfile_ino, rp)) {
                 static const char *es1a = "Failed to load $LogFile";
                 static const char *es1b = "$LogFile is not clean";
                 static const char *es2 = ".  Mount in Windows.";
@@ -1535,6 +1868,10 @@ get_ctx_vol_failed:
                                                 "continue nor on_errors="
                                                 "remount-ro was specified%s",
                                                 es1, es2);
+                                if (vol->logfile_ino) {
+                                        BUG_ON(!rp);
+                                        ntfs_free(rp);
+                                }
                                 goto iput_logfile_err_out;
                         }
                         sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
@@ -1545,6 +1882,51 @@ get_ctx_vol_failed:
                 /* This will prevent a read-write remount. */
                 NVolSetErrors(vol);
         }
+        ntfs_free(rp);
+#endif /* NTFS_RW */
+        /* Get the root directory inode so we can do path lookups. */
+        vol->root_ino = ntfs_iget(sb, FILE_root);
+        if (IS_ERR(vol->root_ino) || is_bad_inode(vol->root_ino)) {
+                if (!IS_ERR(vol->root_ino))
+                        iput(vol->root_ino);
+                ntfs_error(sb, "Failed to load root directory.");
+                goto iput_logfile_err_out;
+        }
+#ifdef NTFS_RW
+        /*
+         * Check if Windows is suspended to disk on the target volume.  If it
+         * is hibernated, we must not write *anything* to the disk so set
+         * NVolErrors() without setting the dirty volume flag and mount
+         * read-only.  This will prevent read-write remounting and it will also
+         * prevent all writes.
+         */
+        err = check_windows_hibernation_status(vol);
+        if (unlikely(err)) {
+                static const char *es1a = "Failed to determine if Windows is "
+                                "hibernated";
+                static const char *es1b = "Windows is hibernated";
+                static const char *es2 = ".  Run chkdsk.";
+                const char *es1;
+
+                es1 = err < 0 ? es1a : es1b;
+                /* If a read-write mount, convert it to a read-only mount. */
+                if (!(sb->s_flags & MS_RDONLY)) {
+                        if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO |
+                                        ON_ERRORS_CONTINUE))) {
+                                ntfs_error(sb, "%s and neither on_errors="
+                                                "continue nor on_errors="
+                                                "remount-ro was specified%s",
+                                                es1, es2);
+                                goto iput_root_err_out;
+                        }
+                        sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
+                        ntfs_error(sb, "%s.  Mounting read-only%s", es1, es2);
+                } else
+                        ntfs_warning(sb, "%s.  Will not be able to remount "
+                                        "read-write%s", es1, es2);
+                /* This will prevent a read-write remount. */
+                NVolSetErrors(vol);
+        }
         /* If (still) a read-write mount, mark the volume dirty. */
         if (!(sb->s_flags & MS_RDONLY) &&
                         ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY)) {
@@ -1558,7 +1940,7 @@ get_ctx_vol_failed:
                         ntfs_error(sb, "%s and neither on_errors=continue nor "
                                         "on_errors=remount-ro was specified%s",
                                         es1, es2);
-                        goto iput_logfile_err_out;
+                        goto iput_root_err_out;
                 }
                 ntfs_error(sb, "%s.  Mounting read-only%s", es1, es2);
                 sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
@@ -1585,7 +1967,7 @@ get_ctx_vol_failed:
                         ntfs_error(sb, "%s and neither on_errors=continue nor "
                                         "on_errors=remount-ro was specified%s",
                                         es1, es2);
-                        goto iput_logfile_err_out;
+                        goto iput_root_err_out;
                 }
                 ntfs_error(sb, "%s.  Mounting read-only%s", es1, es2);
                 sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
@@ -1604,23 +1986,15 @@ get_ctx_vol_failed:
                         ntfs_error(sb, "%s and neither on_errors=continue nor "
                                         "on_errors=remount-ro was specified%s",
                                         es1, es2);
-                        goto iput_logfile_err_out;
+                        goto iput_root_err_out;
                 }
                 ntfs_error(sb, "%s.  Mounting read-only%s", es1, es2);
                 sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
                 NVolSetErrors(vol);
         }
 #endif /* NTFS_RW */
-        /* Get the root directory inode. */
-        vol->root_ino = ntfs_iget(sb, FILE_root);
-        if (IS_ERR(vol->root_ino) || is_bad_inode(vol->root_ino)) {
-                if (!IS_ERR(vol->root_ino))
-                        iput(vol->root_ino);
-                ntfs_error(sb, "Failed to load root directory.");
-                goto iput_logfile_err_out;
-        }
         /* If on NTFS versions before 3.0, we are done. */
-        if (vol->major_ver < 3)
+        if (unlikely(vol->major_ver < 3))
                 return TRUE;
         /* NTFS 3.0+ specific initialization. */
         /* Get the security descriptors inode. */
@@ -1631,7 +2005,7 @@ get_ctx_vol_failed:
                 ntfs_error(sb, "Failed to load $Secure.");
                 goto iput_root_err_out;
         }
-        // FIXME: Initialize security.
+        // TODO: Initialize security.
         /* Get the extended system files' directory inode. */
         vol->extend_ino = ntfs_iget(sb, FILE_Extend);
         if (IS_ERR(vol->extend_ino) || is_bad_inode(vol->extend_ino)) {
@@ -1682,10 +2056,60 @@ get_ctx_vol_failed:
                 sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
                 NVolSetErrors(vol);
         }
-        // TODO: Delete or checkpoint the $UsnJrnl if it exists.
+        /*
+         * Find the transaction log file ($UsnJrnl), load it if present, check
+         * it, and set it up.
+         */
+        if (!load_and_init_usnjrnl(vol)) {
+                static const char *es1 = "Failed to load $UsnJrnl";
+                static const char *es2 = ".  Run chkdsk.";
+
+                /* If a read-write mount, convert it to a read-only mount. */
+                if (!(sb->s_flags & MS_RDONLY)) {
+                        if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO |
+                                        ON_ERRORS_CONTINUE))) {
+                                ntfs_error(sb, "%s and neither on_errors="
+                                                "continue nor on_errors="
+                                                "remount-ro was specified%s",
+                                                es1, es2);
+                                goto iput_usnjrnl_err_out;
+                        }
+                        sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
+                        ntfs_error(sb, "%s.  Mounting read-only%s", es1, es2);
+                } else
+                        ntfs_warning(sb, "%s.  Will not be able to remount "
+                                        "read-write%s", es1, es2);
+                /* This will prevent a read-write remount. */
+                NVolSetErrors(vol);
+        }
+        /* If (still) a read-write mount, stamp the transaction log. */
+        if (!(sb->s_flags & MS_RDONLY) && !ntfs_stamp_usnjrnl(vol)) {
+                static const char *es1 = "Failed to stamp transaction log "
+                                "($UsnJrnl)";
+                static const char *es2 = ".  Run chkdsk.";
+
+                /* Convert to a read-only mount. */
+                if (!(vol->on_errors & (ON_ERRORS_REMOUNT_RO |
+                                ON_ERRORS_CONTINUE))) {
+                        ntfs_error(sb, "%s and neither on_errors=continue nor "
+                                        "on_errors=remount-ro was specified%s",
+                                        es1, es2);
+                        goto iput_usnjrnl_err_out;
+                }
+                ntfs_error(sb, "%s.  Mounting read-only%s", es1, es2);
+                sb->s_flags |= MS_RDONLY | MS_NOATIME | MS_NODIRATIME;
+                NVolSetErrors(vol);
+        }
 #endif /* NTFS_RW */
         return TRUE;
 #ifdef NTFS_RW
+iput_usnjrnl_err_out:
+        if (vol->usnjrnl_j_ino)
+                iput(vol->usnjrnl_j_ino);
+        if (vol->usnjrnl_max_ino)
+                iput(vol->usnjrnl_max_ino);
+        if (vol->usnjrnl_ino)
+                iput(vol->usnjrnl_ino);
 iput_quota_err_out:
         if (vol->quota_q_ino)
                 iput(vol->quota_q_ino);
@@ -1759,6 +2183,12 @@ static void ntfs_put_super(struct super_block *sb)
 
         /* NTFS 3.0+ specific. */
         if (vol->major_ver >= 3) {
+                if (vol->usnjrnl_j_ino)
+                        ntfs_commit_inode(vol->usnjrnl_j_ino);
+                if (vol->usnjrnl_max_ino)
+                        ntfs_commit_inode(vol->usnjrnl_max_ino);
+                if (vol->usnjrnl_ino)
+                        ntfs_commit_inode(vol->usnjrnl_ino);
                 if (vol->quota_q_ino)
                         ntfs_commit_inode(vol->quota_q_ino);
                 if (vol->quota_ino)
@@ -1814,6 +2244,18 @@ static void ntfs_put_super(struct super_block *sb)
         /* NTFS 3.0+ specific clean up. */
         if (vol->major_ver >= 3) {
 #ifdef NTFS_RW
+                if (vol->usnjrnl_j_ino) {
+                        iput(vol->usnjrnl_j_ino);
+                        vol->usnjrnl_j_ino = NULL;
+                }
+                if (vol->usnjrnl_max_ino) {
+                        iput(vol->usnjrnl_max_ino);
+                        vol->usnjrnl_max_ino = NULL;
+                }
+                if (vol->usnjrnl_ino) {
+                        iput(vol->usnjrnl_ino);
+                        vol->usnjrnl_ino = NULL;
+                }
                 if (vol->quota_q_ino) {
                         iput(vol->quota_q_ino);
                         vol->quota_q_ino = NULL;
@@ -1959,8 +2401,7 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
         struct address_space *mapping = vol->lcnbmp_ino->i_mapping;
         filler_t *readpage = (filler_t*)mapping->a_ops->readpage;
         struct page *page;
-        unsigned long index, max_index;
-        unsigned int max_size;
+        pgoff_t index, max_index;
 
         ntfs_debug("Entering.");
         /* Serialize accesses to the cluster bitmap. */
@@ -1972,11 +2413,10 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
          */
         max_index = (((vol->nr_clusters + 7) >> 3) + PAGE_CACHE_SIZE - 1) >>
                         PAGE_CACHE_SHIFT;
-        /* Use multiples of 4 bytes. */
-        max_size = PAGE_CACHE_SIZE >> 2;
-        ntfs_debug("Reading $Bitmap, max_index = 0x%lx, max_size = 0x%x.",
-                        max_index, max_size);
-        for (index = 0UL; index < max_index; index++) {
+        /* Use multiples of 4 bytes, thus max_size is PAGE_CACHE_SIZE / 4. */
+        ntfs_debug("Reading $Bitmap, max_index = 0x%lx, max_size = 0x%lx.",
+                        max_index, PAGE_CACHE_SIZE / 4);
+        for (index = 0; index < max_index; index++) {
                 unsigned int i;
                 /*
                  * Read the page from page cache, getting it from backing store
@@ -2008,7 +2448,7 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
                  * the result as all out of range bytes are set to zero by
                  * ntfs_readpage().
                  */
-                for (i = 0; i < max_size; i++)
+                for (i = 0; i < PAGE_CACHE_SIZE / 4; i++)
                         nr_free -= (s64)hweight32(kaddr[i]);
                 kunmap_atomic(kaddr, KM_USER0);
                 page_cache_release(page);
@@ -2031,6 +2471,8 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
 /**
  * __get_nr_free_mft_records - return the number of free inodes on a volume
  * @vol:        ntfs volume for which to obtain free inode count
+ * @nr_free:    number of mft records in filesystem
+ * @max_index:  maximum number of pages containing set bits
  *
  * Calculate the number of free mft records (inodes) on the mounted NTFS
  * volume @vol. We actually calculate the number of mft records in use instead
@@ -2043,32 +2485,20 @@ static s64 get_nr_free_clusters(ntfs_volume *vol)
  *
  * NOTE: Caller must hold mftbmp_lock rw_semaphore for reading or writing.
  */
-static unsigned long __get_nr_free_mft_records(ntfs_volume *vol)
+static unsigned long __get_nr_free_mft_records(ntfs_volume *vol,
+                s64 nr_free, const pgoff_t max_index)
 {
-        s64 nr_free;
         u32 *kaddr;
         struct address_space *mapping = vol->mftbmp_ino->i_mapping;
         filler_t *readpage = (filler_t*)mapping->a_ops->readpage;
         struct page *page;
-        unsigned long index, max_index;
-        unsigned int max_size;
+        pgoff_t index;
 
         ntfs_debug("Entering.");
-        /* Number of mft records in file system (at this point in time). */
-        nr_free = vol->mft_ino->i_size >> vol->mft_record_size_bits;
-        /*
-         * Convert the maximum number of set bits into bytes rounded up, then
-         * convert into multiples of PAGE_CACHE_SIZE, rounding up so that if we
-         * have one full and one partial page max_index = 2.
-         */
-        max_index = ((((NTFS_I(vol->mft_ino)->initialized_size >>
-                        vol->mft_record_size_bits) + 7) >> 3) +
-                        PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
-        /* Use multiples of 4 bytes. */
-        max_size = PAGE_CACHE_SIZE >> 2;
+        /* Use multiples of 4 bytes, thus max_size is PAGE_CACHE_SIZE / 4. */
         ntfs_debug("Reading $MFT/$BITMAP, max_index = 0x%lx, max_size = "
-                        "0x%x.", max_index, max_size);
-        for (index = 0UL; index < max_index; index++) {
+                        "0x%lx.", max_index, PAGE_CACHE_SIZE / 4);
+        for (index = 0; index < max_index; index++) {
                 unsigned int i;
                 /*
                  * Read the page from page cache, getting it from backing store
@@ -2100,7 +2530,7 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol)
                  * the result as all out of range bytes are set to zero by
                  * ntfs_readpage().
                  */
-                for (i = 0; i < max_size; i++)
+                for (i = 0; i < PAGE_CACHE_SIZE / 4; i++)
                         nr_free -= (s64)hweight32(kaddr[i]);
                 kunmap_atomic(kaddr, KM_USER0);
                 page_cache_release(page);
@@ -2134,8 +2564,11 @@ static unsigned long __get_nr_free_mft_records(ntfs_volume *vol)
  */
 static int ntfs_statfs(struct super_block *sb, struct kstatfs *sfs)
 {
-        ntfs_volume *vol = NTFS_SB(sb);
         s64 size;
+        ntfs_volume *vol = NTFS_SB(sb);
+        ntfs_inode *mft_ni = NTFS_I(vol->mft_ino);
+        pgoff_t max_index;
+        unsigned long flags;
 
         ntfs_debug("Entering.");
         /* Type of filesystem. */
@@ -2143,13 +2576,13 @@ static int ntfs_statfs(struct super_block *sb, struct kstatfs *sfs)
         /* Optimal transfer block size. */
         sfs->f_bsize  = PAGE_CACHE_SIZE;
         /*
-         * Total data blocks in file system in units of f_bsize and since
+         * Total data blocks in filesystem in units of f_bsize and since
          * inodes are also stored in data blocs ($MFT is a file) this is just
          * the total clusters.
          */
         sfs->f_blocks = vol->nr_clusters << vol->cluster_size_bits >>
                                 PAGE_CACHE_SHIFT;
-        /* Free data blocks in file system in units of f_bsize. */
+        /* Free data blocks in filesystem in units of f_bsize. */
         size          = get_nr_free_clusters(vol) << vol->cluster_size_bits >>
                                 PAGE_CACHE_SHIFT;
         if (size < 0LL)
@@ -2158,17 +2591,27 @@ static int ntfs_statfs(struct super_block *sb, struct kstatfs *sfs)
         sfs->f_bavail = sfs->f_bfree = size;
         /* Serialize accesses to the inode bitmap. */
         down_read(&vol->mftbmp_lock);
-        /* Number of inodes in file system (at this point in time). */
-        sfs->f_files = vol->mft_ino->i_size >> vol->mft_record_size_bits;
+        read_lock_irqsave(&mft_ni->size_lock, flags);
+        size = i_size_read(vol->mft_ino) >> vol->mft_record_size_bits;
+        /*
+         * Convert the maximum number of set bits into bytes rounded up, then
+         * convert into multiples of PAGE_CACHE_SIZE, rounding up so that if we
+         * have one full and one partial page max_index = 2.
+         */
+        max_index = ((((mft_ni->initialized_size >> vol->mft_record_size_bits)
+                        + 7) >> 3) + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
+        read_unlock_irqrestore(&mft_ni->size_lock, flags);
+        /* Number of inodes in filesystem (at this point in time). */
+        sfs->f_files = size;
         /* Free inodes in fs (based on current total count). */
-        sfs->f_ffree = __get_nr_free_mft_records(vol);
+        sfs->f_ffree = __get_nr_free_mft_records(vol, size, max_index);
         up_read(&vol->mftbmp_lock);
         /*
          * File system id. This is extremely *nix flavour dependent and even
          * within Linux itself all fs do their own thing. I interpret this to
          * mean a unique id associated with the mounted fs and not the id
-         * associated with the file system driver, the latter is already given
-         * by the file system type in sfs->f_type. Thus we use the 64-bit
+         * associated with the filesystem driver, the latter is already given
+         * by the filesystem type in sfs->f_type. Thus we use the 64-bit
          * volume serial number splitting it into two 32-bit parts. We enter
          * the least significant 32-bits in f_fsid[0] and the most significant
          * 32-bits in f_fsid[1].
@@ -2219,53 +2662,19 @@ static struct super_operations ntfs_sops = {
                                                    proc. */
 };
 
-
-/**
- * Declarations for NTFS specific export operations (fs/ntfs/namei.c).
- */
-extern struct dentry *ntfs_get_parent(struct dentry *child_dent);
-extern struct dentry *ntfs_get_dentry(struct super_block *sb, void *fh);
-
-/**
- * Export operations allowing NFS exporting of mounted NTFS partitions.
- *
- * We use the default ->decode_fh() and ->encode_fh() for now.  Note that they
- * use 32 bits to store the inode number which is an unsigned long so on 64-bit
- * architectures is usually 64 bits so it would all fail horribly on huge
- * volumes.  I guess we need to define our own encode and decode fh functions
- * that store 64-bit inode numbers at some point but for now we will ignore the
- * problem...
- *
- * We also use the default ->get_name() helper (used by ->decode_fh() via
- * fs/exportfs/expfs.c::find_exported_dentry()) as that is completely fs
- * independent.
- *
- * The default ->get_parent() just returns -EACCES so we have to provide our
- * own and the default ->get_dentry() is incompatible with NTFS due to not
- * allowing the inode number 0 which is used in NTFS for the system file $MFT
- * and due to using iget() whereas NTFS needs ntfs_iget().
- */
-static struct export_operations ntfs_export_ops = {
-        .get_parent     = ntfs_get_parent,      /* Find the parent of a given
-                                                   directory. */
-        .get_dentry     = ntfs_get_dentry,      /* Find a dentry for the inode
-                                                   given a file handle
-                                                   sub-fragment. */
-};
-
 /**
- * ntfs_fill_super - mount an ntfs files system
- * @sb:         super block of ntfs file system to mount
+ * ntfs_fill_super - mount an ntfs filesystem
+ * @sb:         super block of ntfs filesystem to mount
  * @opt:        string containing the mount options
  * @silent:     silence error output
  *
  * ntfs_fill_super() is called by the VFS to mount the device described by @sb
- * with the mount otions in @data with the NTFS file system.
+ * with the mount otions in @data with the NTFS filesystem.
  *
  * If @silent is true, remain silent even if errors are detected. This is used
- * during bootup, when the kernel tries to mount the root file system with all
- * registered file systems one after the other until one succeeds. This implies
- * that all file systems except the correct one will quite correctly and
+ * during bootup, when the kernel tries to mount the root filesystem with all
+ * registered filesystems one after the other until one succeeds. This implies
+ * that all filesystems except the correct one will quite correctly and
  * expectedly return an error, but nobody wants to see error messages when in
  * fact this is what is supposed to happen.
  *
@@ -2292,39 +2701,25 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
                 return -ENOMEM;
         }
         /* Initialize ntfs_volume structure. */
-        memset(vol, 0, sizeof(ntfs_volume));
-        vol->sb = sb;
-        vol->upcase = NULL;
-        vol->attrdef = NULL;
-        vol->mft_ino = NULL;
-        vol->mftbmp_ino = NULL;
+        *vol = (ntfs_volume) {
+                .sb = sb,
+                /*
+                 * Default is group and other don't have any access to files or
+                 * directories while owner has full access. Further, files by
+                 * default are not executable but directories are of course
+                 * browseable.
+                 */
+                .fmask = 0177,
+                .dmask = 0077,
+        };
         init_rwsem(&vol->mftbmp_lock);
-#ifdef NTFS_RW
-        vol->mftmirr_ino = NULL;
-        vol->logfile_ino = NULL;
-#endif /* NTFS_RW */
-        vol->lcnbmp_ino = NULL;
         init_rwsem(&vol->lcnbmp_lock);
-        vol->vol_ino = NULL;
-        vol->root_ino = NULL;
-        vol->secure_ino = NULL;
-        vol->extend_ino = NULL;
-#ifdef NTFS_RW
-        vol->quota_ino = NULL;
-        vol->quota_q_ino = NULL;
-#endif /* NTFS_RW */
-        vol->nls_map = NULL;
-
-        /*
-         * Default is group and other don't have any access to files or
-         * directories while owner has full access. Further, files by default
-         * are not executable but directories are of course browseable.
-         */
-        vol->fmask = 0177;
-        vol->dmask = 0077;
 
         unlock_kernel();
 
+        /* By default, enable sparse support. */
+        NVolSetSparseEnabled(vol);
+
         /* Important to get the mount options dealt with now. */
         if (!parse_options(vol, (char*)opt))
                 goto err_out_now;
@@ -2347,7 +2742,8 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
         }
 
         /* Get the size of the device in units of NTFS_BLOCK_SIZE bytes. */
-        vol->nr_blocks = sb->s_bdev->bd_inode->i_size >> NTFS_BLOCK_SIZE_BITS;
+        vol->nr_blocks = i_size_read(sb->s_bdev->bd_inode) >>
+                        NTFS_BLOCK_SIZE_BITS;
 
         /* Read the boot sector and return unlocked buffer head to it. */
         if (!(bh = read_ntfs_boot_sector(sb, silent))) {
@@ -2476,6 +2872,18 @@ static int ntfs_fill_super(struct super_block *sb, void *opt, const int silent)
         /* NTFS 3.0+ specific clean up. */
         if (vol->major_ver >= 3) {
 #ifdef NTFS_RW
+                if (vol->usnjrnl_j_ino) {
+                        iput(vol->usnjrnl_j_ino);
+                        vol->usnjrnl_j_ino = NULL;
+                }
+                if (vol->usnjrnl_max_ino) {
+                        iput(vol->usnjrnl_max_ino);
+                        vol->usnjrnl_max_ino = NULL;
+                }
+                if (vol->usnjrnl_ino) {
+                        iput(vol->usnjrnl_ino);
+                        vol->usnjrnl_ino = NULL;
+                }
                 if (vol->quota_q_ino) {
                         iput(vol->quota_q_ino);
                         vol->quota_q_ino = NULL;
@@ -2581,7 +2989,7 @@ err_out_now:
  */
 kmem_cache_t *ntfs_name_cache;
 
-/* Slab caches for efficient allocation/deallocation of of inodes. */
+/* Slab caches for efficient allocation/deallocation of inodes. */
 kmem_cache_t *ntfs_inode_cache;
 kmem_cache_t *ntfs_big_inode_cache;
 
@@ -2705,7 +3113,7 @@ static int __init init_ntfs_fs(void)
                 ntfs_debug("NTFS driver registered successfully.");
                 return 0; /* Success! */
         }
-        printk(KERN_CRIT "NTFS: Failed to register NTFS file system driver!\n");
+        printk(KERN_CRIT "NTFS: Failed to register NTFS filesystem driver!\n");
 
 sysctl_err_out:
         kmem_cache_destroy(ntfs_big_inode_cache);
@@ -2719,7 +3127,7 @@ actx_err_out:
         kmem_cache_destroy(ntfs_index_ctx_cache);
 ictx_err_out:
         if (!err) {
-                printk(KERN_CRIT "NTFS: Aborting NTFS file system driver "
+                printk(KERN_CRIT "NTFS: Aborting NTFS filesystem driver "
                                 "registration...\n");
                 err = -ENOMEM;
         }
@@ -2759,7 +3167,7 @@ static void __exit exit_ntfs_fs(void)
 }
 
 MODULE_AUTHOR("Anton Altaparmakov <aia21@cantab.net>");
-MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2004 Anton Altaparmakov");
+MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2005 Anton Altaparmakov");
 MODULE_VERSION(NTFS_VERSION);
 MODULE_LICENSE("GPL");
 #ifdef DEBUG