Adding upstream version 6.6.15.upstream/6.6.15

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 3101 insertions, 0 deletions

diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
new file mode 100644
index 0000000000..99ac6ea277
--- /dev/null
+++ b/fs/ntfs/inode.c
@@ -0,0 +1,3101 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * inode.c - NTFS kernel inode handling.
+ *
+ * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
+ */
+
+#include <linux/buffer_head.h>
+#include <linux/fs.h>
+#include <linux/mm.h>
+#include <linux/mount.h>
+#include <linux/mutex.h>
+#include <linux/pagemap.h>
+#include <linux/quotaops.h>
+#include <linux/slab.h>
+#include <linux/log2.h>
+
+#include "aops.h"
+#include "attrib.h"
+#include "bitmap.h"
+#include "dir.h"
+#include "debug.h"
+#include "inode.h"
+#include "lcnalloc.h"
+#include "malloc.h"
+#include "mft.h"
+#include "time.h"
+#include "ntfs.h"
+
+/**
+ * ntfs_test_inode - compare two (possibly fake) inodes for equality
+ * @vi:		vfs inode which to test
+ * @data:	data which is being tested with
+ *
+ * Compare the ntfs attribute embedded in the ntfs specific part of the vfs
+ * inode @vi for equality with the ntfs attribute @data.
+ *
+ * If searching for the normal file/directory inode, set @na->type to AT_UNUSED.
+ * @na->name and @na->name_len are then ignored.
+ *
+ * Return 1 if the attributes match and 0 if not.
+ *
+ * NOTE: This function runs with the inode_hash_lock spin lock held so it is not
+ * allowed to sleep.
+ */
+int ntfs_test_inode(struct inode *vi, void *data)
+{
+	ntfs_attr *na = (ntfs_attr *)data;
+	ntfs_inode *ni;
+
+	if (vi->i_ino != na->mft_no)
+		return 0;
+	ni = NTFS_I(vi);
+	/* If !NInoAttr(ni), @vi is a normal file or directory inode. */
+	if (likely(!NInoAttr(ni))) {
+		/* If not looking for a normal inode this is a mismatch. */
+		if (unlikely(na->type != AT_UNUSED))
+			return 0;
+	} else {
+		/* A fake inode describing an attribute. */
+		if (ni->type != na->type)
+			return 0;
+		if (ni->name_len != na->name_len)
+			return 0;
+		if (na->name_len && memcmp(ni->name, na->name,
+				na->name_len * sizeof(ntfschar)))
+			return 0;
+	}
+	/* Match! */
+	return 1;
+}
+
+/**
+ * ntfs_init_locked_inode - initialize an inode
+ * @vi:		vfs inode to initialize
+ * @data:	data which to initialize @vi to
+ *
+ * Initialize the vfs inode @vi with the values from the ntfs attribute @data in
+ * order to enable ntfs_test_inode() to do its work.
+ *
+ * If initializing the normal file/directory inode, set @na->type to AT_UNUSED.
+ * In that case, @na->name and @na->name_len should be set to NULL and 0,
+ * respectively. Although that is not strictly necessary as
+ * ntfs_read_locked_inode() will fill them in later.
+ *
+ * Return 0 on success and -errno on error.
+ *
+ * NOTE: This function runs with the inode->i_lock spin lock held so it is not
+ * allowed to sleep. (Hence the GFP_ATOMIC allocation.)
+ */
+static int ntfs_init_locked_inode(struct inode *vi, void *data)
+{
+	ntfs_attr *na = (ntfs_attr *)data;
+	ntfs_inode *ni = NTFS_I(vi);
+
+	vi->i_ino = na->mft_no;
+
+	ni->type = na->type;
+	if (na->type == AT_INDEX_ALLOCATION)
+		NInoSetMstProtected(ni);
+
+	ni->name = na->name;
+	ni->name_len = na->name_len;
+
+	/* If initializing a normal inode, we are done. */
+	if (likely(na->type == AT_UNUSED)) {
+		BUG_ON(na->name);
+		BUG_ON(na->name_len);
+		return 0;
+	}
+
+	/* It is a fake inode. */
+	NInoSetAttr(ni);
+
+	/*
+	 * We have I30 global constant as an optimization as it is the name
+	 * in >99.9% of named attributes! The other <0.1% incur a GFP_ATOMIC
+	 * allocation but that is ok. And most attributes are unnamed anyway,
+	 * thus the fraction of named attributes with name != I30 is actually
+	 * absolutely tiny.
+	 */
+	if (na->name_len && na->name != I30) {
+		unsigned int i;
+
+		BUG_ON(!na->name);
+		i = na->name_len * sizeof(ntfschar);
+		ni->name = kmalloc(i + sizeof(ntfschar), GFP_ATOMIC);
+		if (!ni->name)
+			return -ENOMEM;
+		memcpy(ni->name, na->name, i);
+		ni->name[na->name_len] = 0;
+	}
+	return 0;
+}
+
+static int ntfs_read_locked_inode(struct inode *vi);
+static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi);
+static int ntfs_read_locked_index_inode(struct inode *base_vi,
+		struct inode *vi);
+
+/**
+ * ntfs_iget - obtain a struct inode corresponding to a specific normal inode
+ * @sb:		super block of mounted volume
+ * @mft_no:	mft record number / inode number to obtain
+ *
+ * Obtain the struct inode corresponding to a specific normal inode (i.e. a
+ * file or directory).
+ *
+ * If the inode is in the cache, it is just returned with an increased
+ * reference count. Otherwise, a new struct inode is allocated and initialized,
+ * and finally ntfs_read_locked_inode() is called to read in the inode and
+ * fill in the remainder of the inode structure.
+ *
+ * Return the struct inode on success. Check the return value with IS_ERR() and
+ * if true, the function failed and the error code is obtained from PTR_ERR().
+ */
+struct inode *ntfs_iget(struct super_block *sb, unsigned long mft_no)
+{
+	struct inode *vi;
+	int err;
+	ntfs_attr na;
+
+	na.mft_no = mft_no;
+	na.type = AT_UNUSED;
+	na.name = NULL;
+	na.name_len = 0;
+
+	vi = iget5_locked(sb, mft_no, ntfs_test_inode,
+			ntfs_init_locked_inode, &na);
+	if (unlikely(!vi))
+		return ERR_PTR(-ENOMEM);
+
+	err = 0;
+
+	/* If this is a freshly allocated inode, need to read it now. */
+	if (vi->i_state & I_NEW) {
+		err = ntfs_read_locked_inode(vi);
+		unlock_new_inode(vi);
+	}
+	/*
+	 * There is no point in keeping bad inodes around if the failure was
+	 * due to ENOMEM. We want to be able to retry again later.
+	 */
+	if (unlikely(err == -ENOMEM)) {
+		iput(vi);
+		vi = ERR_PTR(err);
+	}
+	return vi;
+}
+
+/**
+ * ntfs_attr_iget - obtain a struct inode corresponding to an attribute
+ * @base_vi:	vfs base inode containing the attribute
+ * @type:	attribute type
+ * @name:	Unicode name of the attribute (NULL if unnamed)
+ * @name_len:	length of @name in Unicode characters (0 if unnamed)
+ *
+ * Obtain the (fake) struct inode corresponding to the attribute specified by
+ * @type, @name, and @name_len, which is present in the base mft record
+ * specified by the vfs inode @base_vi.
+ *
+ * If the attribute inode is in the cache, it is just returned with an
+ * increased reference count. Otherwise, a new struct inode is allocated and
+ * initialized, and finally ntfs_read_locked_attr_inode() is called to read the
+ * attribute and fill in the inode structure.
+ *
+ * Note, for index allocation attributes, you need to use ntfs_index_iget()
+ * instead of ntfs_attr_iget() as working with indices is a lot more complex.
+ *
+ * Return the struct inode of the attribute inode on success. Check the return
+ * value with IS_ERR() and if true, the function failed and the error code is
+ * obtained from PTR_ERR().
+ */
+struct inode *ntfs_attr_iget(struct inode *base_vi, ATTR_TYPE type,
+		ntfschar *name, u32 name_len)
+{
+	struct inode *vi;
+	int err;
+	ntfs_attr na;
+
+	/* Make sure no one calls ntfs_attr_iget() for indices. */
+	BUG_ON(type == AT_INDEX_ALLOCATION);
+
+	na.mft_no = base_vi->i_ino;
+	na.type = type;
+	na.name = name;
+	na.name_len = name_len;
+
+	vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
+			ntfs_init_locked_inode, &na);
+	if (unlikely(!vi))
+		return ERR_PTR(-ENOMEM);
+
+	err = 0;
+
+	/* If this is a freshly allocated inode, need to read it now. */
+	if (vi->i_state & I_NEW) {
+		err = ntfs_read_locked_attr_inode(base_vi, vi);
+		unlock_new_inode(vi);
+	}
+	/*
+	 * There is no point in keeping bad attribute inodes around. This also
+	 * simplifies things in that we never need to check for bad attribute
+	 * inodes elsewhere.
+	 */
+	if (unlikely(err)) {
+		iput(vi);
+		vi = ERR_PTR(err);
+	}
+	return vi;
+}
+
+/**
+ * ntfs_index_iget - obtain a struct inode corresponding to an index
+ * @base_vi:	vfs base inode containing the index related attributes
+ * @name:	Unicode name of the index
+ * @name_len:	length of @name in Unicode characters
+ *
+ * Obtain the (fake) struct inode corresponding to the index specified by @name
+ * and @name_len, which is present in the base mft record specified by the vfs
+ * inode @base_vi.
+ *
+ * If the index inode is in the cache, it is just returned with an increased
+ * reference count.  Otherwise, a new struct inode is allocated and
+ * initialized, and finally ntfs_read_locked_index_inode() is called to read
+ * the index related attributes and fill in the inode structure.
+ *
+ * Return the struct inode of the index inode on success. Check the return
+ * value with IS_ERR() and if true, the function failed and the error code is
+ * obtained from PTR_ERR().
+ */
+struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
+		u32 name_len)
+{
+	struct inode *vi;
+	int err;
+	ntfs_attr na;
+
+	na.mft_no = base_vi->i_ino;
+	na.type = AT_INDEX_ALLOCATION;
+	na.name = name;
+	na.name_len = name_len;
+
+	vi = iget5_locked(base_vi->i_sb, na.mft_no, ntfs_test_inode,
+			ntfs_init_locked_inode, &na);
+	if (unlikely(!vi))
+		return ERR_PTR(-ENOMEM);
+
+	err = 0;
+
+	/* If this is a freshly allocated inode, need to read it now. */
+	if (vi->i_state & I_NEW) {
+		err = ntfs_read_locked_index_inode(base_vi, vi);
+		unlock_new_inode(vi);
+	}
+	/*
+	 * There is no point in keeping bad index inodes around.  This also
+	 * simplifies things in that we never need to check for bad index
+	 * inodes elsewhere.
+	 */
+	if (unlikely(err)) {
+		iput(vi);
+		vi = ERR_PTR(err);
+	}
+	return vi;
+}
+
+struct inode *ntfs_alloc_big_inode(struct super_block *sb)
+{
+	ntfs_inode *ni;
+
+	ntfs_debug("Entering.");
+	ni = alloc_inode_sb(sb, ntfs_big_inode_cache, GFP_NOFS);
+	if (likely(ni != NULL)) {
+		ni->state = 0;
+		return VFS_I(ni);
+	}
+	ntfs_error(sb, "Allocation of NTFS big inode structure failed.");
+	return NULL;
+}
+
+void ntfs_free_big_inode(struct inode *inode)
+{
+	kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
+}
+
+static inline ntfs_inode *ntfs_alloc_extent_inode(void)
+{
+	ntfs_inode *ni;
+
+	ntfs_debug("Entering.");
+	ni = kmem_cache_alloc(ntfs_inode_cache, GFP_NOFS);
+	if (likely(ni != NULL)) {
+		ni->state = 0;
+		return ni;
+	}
+	ntfs_error(NULL, "Allocation of NTFS inode structure failed.");
+	return NULL;
+}
+
+static void ntfs_destroy_extent_inode(ntfs_inode *ni)
+{
+	ntfs_debug("Entering.");
+	BUG_ON(ni->page);
+	if (!atomic_dec_and_test(&ni->count))
+		BUG();
+	kmem_cache_free(ntfs_inode_cache, ni);
+}
+
+/*
+ * The attribute runlist lock has separate locking rules from the
+ * normal runlist lock, so split the two lock-classes:
+ */
+static struct lock_class_key attr_list_rl_lock_class;
+
+/**
+ * __ntfs_init_inode - initialize ntfs specific part of an inode
+ * @sb:		super block of mounted volume
+ * @ni:		freshly allocated ntfs inode which to initialize
+ *
+ * Initialize an ntfs inode to defaults.
+ *
+ * NOTE: ni->mft_no, ni->state, ni->type, ni->name, and ni->name_len are left
+ * untouched. Make sure to initialize them elsewhere.
+ *
+ * Return zero on success and -ENOMEM on error.
+ */
+void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni)
+{
+	ntfs_debug("Entering.");
+	rwlock_init(&ni->size_lock);
+	ni->initialized_size = ni->allocated_size = 0;
+	ni->seq_no = 0;
+	atomic_set(&ni->count, 1);
+	ni->vol = NTFS_SB(sb);
+	ntfs_init_runlist(&ni->runlist);
+	mutex_init(&ni->mrec_lock);
+	ni->page = NULL;
+	ni->page_ofs = 0;
+	ni->attr_list_size = 0;
+	ni->attr_list = NULL;
+	ntfs_init_runlist(&ni->attr_list_rl);
+	lockdep_set_class(&ni->attr_list_rl.lock,
+				&attr_list_rl_lock_class);
+	ni->itype.index.block_size = 0;
+	ni->itype.index.vcn_size = 0;
+	ni->itype.index.collation_rule = 0;
+	ni->itype.index.block_size_bits = 0;
+	ni->itype.index.vcn_size_bits = 0;
+	mutex_init(&ni->extent_lock);
+	ni->nr_extents = 0;
+	ni->ext.base_ntfs_ino = NULL;
+}
+
+/*
+ * Extent inodes get MFT-mapped in a nested way, while the base inode
+ * is still mapped. Teach this nesting to the lock validator by creating
+ * a separate class for nested inode's mrec_lock's:
+ */
+static struct lock_class_key extent_inode_mrec_lock_key;
+
+inline ntfs_inode *ntfs_new_extent_inode(struct super_block *sb,
+		unsigned long mft_no)
+{
+	ntfs_inode *ni = ntfs_alloc_extent_inode();
+
+	ntfs_debug("Entering.");
+	if (likely(ni != NULL)) {
+		__ntfs_init_inode(sb, ni);
+		lockdep_set_class(&ni->mrec_lock, &extent_inode_mrec_lock_key);
+		ni->mft_no = mft_no;
+		ni->type = AT_UNUSED;
+		ni->name = NULL;
+		ni->name_len = 0;
+	}
+	return ni;
+}
+
+/**
+ * ntfs_is_extended_system_file - check if a file is in the $Extend directory
+ * @ctx:	initialized attribute search context
+ *
+ * Search all file name attributes in the inode described by the attribute
+ * search context @ctx and check if any of the names are in the $Extend system
+ * directory.
+ *
+ * Return values:
+ *	   1: file is in $Extend directory
+ *	   0: file is not in $Extend directory
+ *    -errno: failed to determine if the file is in the $Extend directory
+ */
+static int ntfs_is_extended_system_file(ntfs_attr_search_ctx *ctx)
+{
+	int nr_links, err;
+
+	/* Restart search. */
+	ntfs_attr_reinit_search_ctx(ctx);
+
+	/* Get number of hard links. */
+	nr_links = le16_to_cpu(ctx->mrec->link_count);
+
+	/* Loop through all hard links. */
+	while (!(err = ntfs_attr_lookup(AT_FILE_NAME, NULL, 0, 0, 0, NULL, 0,
+			ctx))) {
+		FILE_NAME_ATTR *file_name_attr;
+		ATTR_RECORD *attr = ctx->attr;
+		u8 *p, *p2;
+
+		nr_links--;
+		/*
+		 * Maximum sanity checking as we are called on an inode that
+		 * we suspect might be corrupt.
+		 */
+		p = (u8*)attr + le32_to_cpu(attr->length);
+		if (p < (u8*)ctx->mrec || (u8*)p > (u8*)ctx->mrec +
+				le32_to_cpu(ctx->mrec->bytes_in_use)) {
+err_corrupt_attr:
+			ntfs_error(ctx->ntfs_ino->vol->sb, "Corrupt file name "
+					"attribute. You should run chkdsk.");
+			return -EIO;
+		}
+		if (attr->non_resident) {
+			ntfs_error(ctx->ntfs_ino->vol->sb, "Non-resident file "
+					"name. You should run chkdsk.");
+			return -EIO;
+		}
+		if (attr->flags) {
+			ntfs_error(ctx->ntfs_ino->vol->sb, "File name with "
+					"invalid flags. You should run "
+					"chkdsk.");
+			return -EIO;
+		}
+		if (!(attr->data.resident.flags & RESIDENT_ATTR_IS_INDEXED)) {
+			ntfs_error(ctx->ntfs_ino->vol->sb, "Unindexed file "
+					"name. You should run chkdsk.");
+			return -EIO;
+		}
+		file_name_attr = (FILE_NAME_ATTR*)((u8*)attr +
+				le16_to_cpu(attr->data.resident.value_offset));
+		p2 = (u8 *)file_name_attr + le32_to_cpu(attr->data.resident.value_length);
+		if (p2 < (u8*)attr || p2 > p)
+			goto err_corrupt_attr;
+		/* This attribute is ok, but is it in the $Extend directory? */
+		if (MREF_LE(file_name_attr->parent_directory) == FILE_Extend)
+			return 1;	/* YES, it's an extended system file. */
+	}
+	if (unlikely(err != -ENOENT))
+		return err;
+	if (unlikely(nr_links)) {
+		ntfs_error(ctx->ntfs_ino->vol->sb, "Inode hard link count "
+				"doesn't match number of name attributes. You "
+				"should run chkdsk.");
+		return -EIO;
+	}
+	return 0;	/* NO, it is not an extended system file. */
+}
+
+/**
+ * ntfs_read_locked_inode - read an inode from its device
+ * @vi:		inode to read
+ *
+ * ntfs_read_locked_inode() is called from ntfs_iget() to read the inode
+ * described by @vi into memory from the device.
+ *
+ * The only fields in @vi that we need to/can look at when the function is
+ * called are i_sb, pointing to the mounted device's super block, and i_ino,
+ * the number of the inode to load.
+ *
+ * ntfs_read_locked_inode() maps, pins and locks the mft record number i_ino
+ * for reading and sets up the necessary @vi fields as well as initializing
+ * the ntfs inode.
+ *
+ * Q: What locks are held when the function is called?
+ * A: i_state has I_NEW set, hence the inode is locked, also
+ *    i_count is set to 1, so it is not going to go away
+ *    i_flags is set to 0 and we have no business touching it.  Only an ioctl()
+ *    is allowed to write to them. We should of course be honouring them but
+ *    we need to do that using the IS_* macros defined in include/linux/fs.h.
+ *    In any case ntfs_read_locked_inode() has nothing to do with i_flags.
+ *
+ * Return 0 on success and -errno on error.  In the error case, the inode will
+ * have had make_bad_inode() executed on it.
+ */
+static int ntfs_read_locked_inode(struct inode *vi)
+{
+	ntfs_volume *vol = NTFS_SB(vi->i_sb);
+	ntfs_inode *ni;
+	struct inode *bvi;
+	MFT_RECORD *m;
+	ATTR_RECORD *a;
+	STANDARD_INFORMATION *si;
+	ntfs_attr_search_ctx *ctx;
+	int err = 0;
+
+	ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
+
+	/* Setup the generic vfs inode parts now. */
+	vi->i_uid = vol->uid;
+	vi->i_gid = vol->gid;
+	vi->i_mode = 0;
+
+	/*
+	 * Initialize the ntfs specific part of @vi special casing
+	 * FILE_MFT which we need to do at mount time.
+	 */
+	if (vi->i_ino != FILE_MFT)
+		ntfs_init_big_inode(vi);
+	ni = NTFS_I(vi);
+
+	m = map_mft_record(ni);
+	if (IS_ERR(m)) {
+		err = PTR_ERR(m);
+		goto err_out;
+	}
+	ctx = ntfs_attr_get_search_ctx(ni, m);
+	if (!ctx) {
+		err = -ENOMEM;
+		goto unm_err_out;
+	}
+
+	if (!(m->flags & MFT_RECORD_IN_USE)) {
+		ntfs_error(vi->i_sb, "Inode is not in use!");
+		goto unm_err_out;
+	}
+	if (m->base_mft_record) {
+		ntfs_error(vi->i_sb, "Inode is an extent inode!");
+		goto unm_err_out;
+	}
+
+	/* Transfer information from mft record into vfs and ntfs inodes. */
+	vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
+
+	/*
+	 * FIXME: Keep in mind that link_count is two for files which have both
+	 * a long file name and a short file name as separate entries, so if
+	 * we are hiding short file names this will be too high. Either we need
+	 * to account for the short file names by subtracting them or we need
+	 * to make sure we delete files even though i_nlink is not zero which
+	 * might be tricky due to vfs interactions. Need to think about this
+	 * some more when implementing the unlink command.
+	 */
+	set_nlink(vi, le16_to_cpu(m->link_count));
+	/*
+	 * FIXME: Reparse points can have the directory bit set even though
+	 * they would be S_IFLNK. Need to deal with this further below when we
+	 * implement reparse points / symbolic links but it will do for now.
+	 * Also if not a directory, it could be something else, rather than
+	 * a regular file. But again, will do for now.
+	 */
+	/* Everyone gets all permissions. */
+	vi->i_mode |= S_IRWXUGO;
+	/* If read-only, no one gets write permissions. */
+	if (IS_RDONLY(vi))
+		vi->i_mode &= ~S_IWUGO;
+	if (m->flags & MFT_RECORD_IS_DIRECTORY) {
+		vi->i_mode |= S_IFDIR;
+		/*
+		 * Apply the directory permissions mask set in the mount
+		 * options.
+		 */
+		vi->i_mode &= ~vol->dmask;
+		/* Things break without this kludge! */
+		if (vi->i_nlink > 1)
+			set_nlink(vi, 1);
+	} else {
+		vi->i_mode |= S_IFREG;
+		/* Apply the file permissions mask set in the mount options. */
+		vi->i_mode &= ~vol->fmask;
+	}
+	/*
+	 * Find the standard information attribute in the mft record. At this
+	 * stage we haven't setup the attribute list stuff yet, so this could
+	 * in fact fail if the standard information is in an extent record, but
+	 * I don't think this actually ever happens.
+	 */
+	err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0, 0, 0, NULL, 0,
+			ctx);
+	if (unlikely(err)) {
+		if (err == -ENOENT) {
+			/*
+			 * TODO: We should be performing a hot fix here (if the
+			 * recover mount option is set) by creating a new
+			 * attribute.
+			 */
+			ntfs_error(vi->i_sb, "$STANDARD_INFORMATION attribute "
+					"is missing.");
+		}
+		goto unm_err_out;
+	}
+	a = ctx->attr;
+	/* Get the standard information attribute value. */
+	if ((u8 *)a + le16_to_cpu(a->data.resident.value_offset)
+			+ le32_to_cpu(a->data.resident.value_length) >
+			(u8 *)ctx->mrec + vol->mft_record_size) {
+		ntfs_error(vi->i_sb, "Corrupt standard information attribute in inode.");
+		goto unm_err_out;
+	}
+	si = (STANDARD_INFORMATION*)((u8*)a +
+			le16_to_cpu(a->data.resident.value_offset));
+
+	/* Transfer information from the standard information into vi. */
+	/*
+	 * Note: The i_?times do not quite map perfectly onto the NTFS times,
+	 * but they are close enough, and in the end it doesn't really matter
+	 * that much...
+	 */
+	/*
+	 * mtime is the last change of the data within the file. Not changed
+	 * when only metadata is changed, e.g. a rename doesn't affect mtime.
+	 */
+	vi->i_mtime = ntfs2utc(si->last_data_change_time);
+	/*
+	 * ctime is the last change of the metadata of the file. This obviously
+	 * always changes, when mtime is changed. ctime can be changed on its
+	 * own, mtime is then not changed, e.g. when a file is renamed.
+	 */
+	inode_set_ctime_to_ts(vi, ntfs2utc(si->last_mft_change_time));
+	/*
+	 * Last access to the data within the file. Not changed during a rename
+	 * for example but changed whenever the file is written to.
+	 */
+	vi->i_atime = ntfs2utc(si->last_access_time);
+
+	/* Find the attribute list attribute if present. */
+	ntfs_attr_reinit_search_ctx(ctx);
+	err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
+	if (err) {
+		if (unlikely(err != -ENOENT)) {
+			ntfs_error(vi->i_sb, "Failed to lookup attribute list "
+					"attribute.");
+			goto unm_err_out;
+		}
+	} else /* if (!err) */ {
+		if (vi->i_ino == FILE_MFT)
+			goto skip_attr_list_load;
+		ntfs_debug("Attribute list found in inode 0x%lx.", vi->i_ino);
+		NInoSetAttrList(ni);
+		a = ctx->attr;
+		if (a->flags & ATTR_COMPRESSION_MASK) {
+			ntfs_error(vi->i_sb, "Attribute list attribute is "
+					"compressed.");
+			goto unm_err_out;
+		}
+		if (a->flags & ATTR_IS_ENCRYPTED ||
+				a->flags & ATTR_IS_SPARSE) {
+			if (a->non_resident) {
+				ntfs_error(vi->i_sb, "Non-resident attribute "
+						"list attribute is encrypted/"
+						"sparse.");
+				goto unm_err_out;
+			}
+			ntfs_warning(vi->i_sb, "Resident attribute list "
+					"attribute in inode 0x%lx is marked "
+					"encrypted/sparse which is not true.  "
+					"However, Windows allows this and "
+					"chkdsk does not detect or correct it "
+					"so we will just ignore the invalid "
+					"flags and pretend they are not set.",
+					vi->i_ino);
+		}
+		/* Now allocate memory for the attribute list. */
+		ni->attr_list_size = (u32)ntfs_attr_size(a);
+		ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
+		if (!ni->attr_list) {
+			ntfs_error(vi->i_sb, "Not enough memory to allocate "
+					"buffer for attribute list.");
+			err = -ENOMEM;
+			goto unm_err_out;
+		}
+		if (a->non_resident) {
+			NInoSetAttrListNonResident(ni);
+			if (a->data.non_resident.lowest_vcn) {
+				ntfs_error(vi->i_sb, "Attribute list has non "
+						"zero lowest_vcn.");
+				goto unm_err_out;
+			}
+			/*
+			 * Setup the runlist. No need for locking as we have
+			 * exclusive access to the inode at this time.
+			 */
+			ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
+					a, NULL);
+			if (IS_ERR(ni->attr_list_rl.rl)) {
+				err = PTR_ERR(ni->attr_list_rl.rl);
+				ni->attr_list_rl.rl = NULL;
+				ntfs_error(vi->i_sb, "Mapping pairs "
+						"decompression failed.");
+				goto unm_err_out;
+			}
+			/* Now load the attribute list. */
+			if ((err = load_attribute_list(vol, &ni->attr_list_rl,
+					ni->attr_list, ni->attr_list_size,
+					sle64_to_cpu(a->data.non_resident.
+					initialized_size)))) {
+				ntfs_error(vi->i_sb, "Failed to load "
+						"attribute list attribute.");
+				goto unm_err_out;
+			}
+		} else /* if (!a->non_resident) */ {
+			if ((u8*)a + le16_to_cpu(a->data.resident.value_offset)
+					+ le32_to_cpu(
+					a->data.resident.value_length) >
+					(u8*)ctx->mrec + vol->mft_record_size) {
+				ntfs_error(vi->i_sb, "Corrupt attribute list "
+						"in inode.");
+				goto unm_err_out;
+			}
+			/* Now copy the attribute list. */
+			memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
+					a->data.resident.value_offset),
+					le32_to_cpu(
+					a->data.resident.value_length));
+		}
+	}
+skip_attr_list_load:
+	/*
+	 * If an attribute list is present we now have the attribute list value
+	 * in ntfs_ino->attr_list and it is ntfs_ino->attr_list_size bytes.
+	 */
+	if (S_ISDIR(vi->i_mode)) {
+		loff_t bvi_size;
+		ntfs_inode *bni;
+		INDEX_ROOT *ir;
+		u8 *ir_end, *index_end;
+
+		/* It is a directory, find index root attribute. */
+		ntfs_attr_reinit_search_ctx(ctx);
+		err = ntfs_attr_lookup(AT_INDEX_ROOT, I30, 4, CASE_SENSITIVE,
+				0, NULL, 0, ctx);
+		if (unlikely(err)) {
+			if (err == -ENOENT) {
+				// FIXME: File is corrupt! Hot-fix with empty
+				// index root attribute if recovery option is
+				// set.
+				ntfs_error(vi->i_sb, "$INDEX_ROOT attribute "
+						"is missing.");
+			}
+			goto unm_err_out;
+		}
+		a = ctx->attr;
+		/* Set up the state. */
+		if (unlikely(a->non_resident)) {
+			ntfs_error(vol->sb, "$INDEX_ROOT attribute is not "
+					"resident.");
+			goto unm_err_out;
+		}
+		/* Ensure the attribute name is placed before the value. */
+		if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+				le16_to_cpu(a->data.resident.value_offset)))) {
+			ntfs_error(vol->sb, "$INDEX_ROOT attribute name is "
+					"placed after the attribute value.");
+			goto unm_err_out;
+		}
+		/*
+		 * Compressed/encrypted index root just means that the newly
+		 * created files in that directory should be created compressed/
+		 * encrypted. However index root cannot be both compressed and
+		 * encrypted.
+		 */
+		if (a->flags & ATTR_COMPRESSION_MASK)
+			NInoSetCompressed(ni);
+		if (a->flags & ATTR_IS_ENCRYPTED) {
+			if (a->flags & ATTR_COMPRESSION_MASK) {
+				ntfs_error(vi->i_sb, "Found encrypted and "
+						"compressed attribute.");
+				goto unm_err_out;
+			}
+			NInoSetEncrypted(ni);
+		}
+		if (a->flags & ATTR_IS_SPARSE)
+			NInoSetSparse(ni);
+		ir = (INDEX_ROOT*)((u8*)a +
+				le16_to_cpu(a->data.resident.value_offset));
+		ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
+		if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
+			ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
+					"corrupt.");
+			goto unm_err_out;
+		}
+		index_end = (u8*)&ir->index +
+				le32_to_cpu(ir->index.index_length);
+		if (index_end > ir_end) {
+			ntfs_error(vi->i_sb, "Directory index is corrupt.");
+			goto unm_err_out;
+		}
+		if (ir->type != AT_FILE_NAME) {
+			ntfs_error(vi->i_sb, "Indexed attribute is not "
+					"$FILE_NAME.");
+			goto unm_err_out;
+		}
+		if (ir->collation_rule != COLLATION_FILE_NAME) {
+			ntfs_error(vi->i_sb, "Index collation rule is not "
+					"COLLATION_FILE_NAME.");
+			goto unm_err_out;
+		}
+		ni->itype.index.collation_rule = ir->collation_rule;
+		ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
+		if (ni->itype.index.block_size &
+				(ni->itype.index.block_size - 1)) {
+			ntfs_error(vi->i_sb, "Index block size (%u) is not a "
+					"power of two.",
+					ni->itype.index.block_size);
+			goto unm_err_out;
+		}
+		if (ni->itype.index.block_size > PAGE_SIZE) {
+			ntfs_error(vi->i_sb, "Index block size (%u) > "
+					"PAGE_SIZE (%ld) is not "
+					"supported.  Sorry.",
+					ni->itype.index.block_size,
+					PAGE_SIZE);
+			err = -EOPNOTSUPP;
+			goto unm_err_out;
+		}
+		if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
+			ntfs_error(vi->i_sb, "Index block size (%u) < "
+					"NTFS_BLOCK_SIZE (%i) is not "
+					"supported.  Sorry.",
+					ni->itype.index.block_size,
+					NTFS_BLOCK_SIZE);
+			err = -EOPNOTSUPP;
+			goto unm_err_out;
+		}
+		ni->itype.index.block_size_bits =
+				ffs(ni->itype.index.block_size) - 1;
+		/* Determine the size of a vcn in the directory index. */
+		if (vol->cluster_size <= ni->itype.index.block_size) {
+			ni->itype.index.vcn_size = vol->cluster_size;
+			ni->itype.index.vcn_size_bits = vol->cluster_size_bits;
+		} else {
+			ni->itype.index.vcn_size = vol->sector_size;
+			ni->itype.index.vcn_size_bits = vol->sector_size_bits;
+		}
+
+		/* Setup the index allocation attribute, even if not present. */
+		NInoSetMstProtected(ni);
+		ni->type = AT_INDEX_ALLOCATION;
+		ni->name = I30;
+		ni->name_len = 4;
+
+		if (!(ir->index.flags & LARGE_INDEX)) {
+			/* No index allocation. */
+			vi->i_size = ni->initialized_size =
+					ni->allocated_size = 0;
+			/* We are done with the mft record, so we release it. */
+			ntfs_attr_put_search_ctx(ctx);
+			unmap_mft_record(ni);
+			m = NULL;
+			ctx = NULL;
+			goto skip_large_dir_stuff;
+		} /* LARGE_INDEX: Index allocation present. Setup state. */
+		NInoSetIndexAllocPresent(ni);
+		/* Find index allocation attribute. */
+		ntfs_attr_reinit_search_ctx(ctx);
+		err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, I30, 4,
+				CASE_SENSITIVE, 0, NULL, 0, ctx);
+		if (unlikely(err)) {
+			if (err == -ENOENT)
+				ntfs_error(vi->i_sb, "$INDEX_ALLOCATION "
+						"attribute is not present but "
+						"$INDEX_ROOT indicated it is.");
+			else
+				ntfs_error(vi->i_sb, "Failed to lookup "
+						"$INDEX_ALLOCATION "
+						"attribute.");
+			goto unm_err_out;
+		}
+		a = ctx->attr;
+		if (!a->non_resident) {
+			ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
+					"is resident.");
+			goto unm_err_out;
+		}
+		/*
+		 * Ensure the attribute name is placed before the mapping pairs
+		 * array.
+		 */
+		if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+				le16_to_cpu(
+				a->data.non_resident.mapping_pairs_offset)))) {
+			ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name "
+					"is placed after the mapping pairs "
+					"array.");
+			goto unm_err_out;
+		}
+		if (a->flags & ATTR_IS_ENCRYPTED) {
+			ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
+					"is encrypted.");
+			goto unm_err_out;
+		}
+		if (a->flags & ATTR_IS_SPARSE) {
+			ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
+					"is sparse.");
+			goto unm_err_out;
+		}
+		if (a->flags & ATTR_COMPRESSION_MASK) {
+			ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute "
+					"is compressed.");
+			goto unm_err_out;
+		}
+		if (a->data.non_resident.lowest_vcn) {
+			ntfs_error(vi->i_sb, "First extent of "
+					"$INDEX_ALLOCATION attribute has non "
+					"zero lowest_vcn.");
+			goto unm_err_out;
+		}
+		vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
+		ni->initialized_size = sle64_to_cpu(
+				a->data.non_resident.initialized_size);
+		ni->allocated_size = sle64_to_cpu(
+				a->data.non_resident.allocated_size);
+		/*
+		 * We are done with the mft record, so we release it. Otherwise
+		 * we would deadlock in ntfs_attr_iget().
+		 */
+		ntfs_attr_put_search_ctx(ctx);
+		unmap_mft_record(ni);
+		m = NULL;
+		ctx = NULL;
+		/* Get the index bitmap attribute inode. */
+		bvi = ntfs_attr_iget(vi, AT_BITMAP, I30, 4);
+		if (IS_ERR(bvi)) {
+			ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
+			err = PTR_ERR(bvi);
+			goto unm_err_out;
+		}
+		bni = NTFS_I(bvi);
+		if (NInoCompressed(bni) || NInoEncrypted(bni) ||
+				NInoSparse(bni)) {
+			ntfs_error(vi->i_sb, "$BITMAP attribute is compressed "
+					"and/or encrypted and/or sparse.");
+			goto iput_unm_err_out;
+		}
+		/* Consistency check bitmap size vs. index allocation size. */
+		bvi_size = i_size_read(bvi);
+		if ((bvi_size << 3) < (vi->i_size >>
+				ni->itype.index.block_size_bits)) {
+			ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) "
+					"for index allocation (0x%llx).",
+					bvi_size << 3, vi->i_size);
+			goto iput_unm_err_out;
+		}
+		/* No longer need the bitmap attribute inode. */
+		iput(bvi);
+skip_large_dir_stuff:
+		/* Setup the operations for this inode. */
+		vi->i_op = &ntfs_dir_inode_ops;
+		vi->i_fop = &ntfs_dir_ops;
+		vi->i_mapping->a_ops = &ntfs_mst_aops;
+	} else {
+		/* It is a file. */
+		ntfs_attr_reinit_search_ctx(ctx);
+
+		/* Setup the data attribute, even if not present. */
+		ni->type = AT_DATA;
+		ni->name = NULL;
+		ni->name_len = 0;
+
+		/* Find first extent of the unnamed data attribute. */
+		err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, 0, NULL, 0, ctx);
+		if (unlikely(err)) {
+			vi->i_size = ni->initialized_size =
+					ni->allocated_size = 0;
+			if (err != -ENOENT) {
+				ntfs_error(vi->i_sb, "Failed to lookup $DATA "
+						"attribute.");
+				goto unm_err_out;
+			}
+			/*
+			 * FILE_Secure does not have an unnamed $DATA
+			 * attribute, so we special case it here.
+			 */
+			if (vi->i_ino == FILE_Secure)
+				goto no_data_attr_special_case;
+			/*
+			 * Most if not all the system files in the $Extend
+			 * system directory do not have unnamed data
+			 * attributes so we need to check if the parent
+			 * directory of the file is FILE_Extend and if it is
+			 * ignore this error. To do this we need to get the
+			 * name of this inode from the mft record as the name
+			 * contains the back reference to the parent directory.
+			 */
+			if (ntfs_is_extended_system_file(ctx) > 0)
+				goto no_data_attr_special_case;
+			// FIXME: File is corrupt! Hot-fix with empty data
+			// attribute if recovery option is set.
+			ntfs_error(vi->i_sb, "$DATA attribute is missing.");
+			goto unm_err_out;
+		}
+		a = ctx->attr;
+		/* Setup the state. */
+		if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
+			if (a->flags & ATTR_COMPRESSION_MASK) {
+				NInoSetCompressed(ni);
+				if (vol->cluster_size > 4096) {
+					ntfs_error(vi->i_sb, "Found "
+							"compressed data but "
+							"compression is "
+							"disabled due to "
+							"cluster size (%i) > "
+							"4kiB.",
+							vol->cluster_size);
+					goto unm_err_out;
+				}
+				if ((a->flags & ATTR_COMPRESSION_MASK)
+						!= ATTR_IS_COMPRESSED) {
+					ntfs_error(vi->i_sb, "Found unknown "
+							"compression method "
+							"or corrupt file.");
+					goto unm_err_out;
+				}
+			}
+			if (a->flags & ATTR_IS_SPARSE)
+				NInoSetSparse(ni);
+		}
+		if (a->flags & ATTR_IS_ENCRYPTED) {
+			if (NInoCompressed(ni)) {
+				ntfs_error(vi->i_sb, "Found encrypted and "
+						"compressed data.");
+				goto unm_err_out;
+			}
+			NInoSetEncrypted(ni);
+		}
+		if (a->non_resident) {
+			NInoSetNonResident(ni);
+			if (NInoCompressed(ni) || NInoSparse(ni)) {
+				if (NInoCompressed(ni) && a->data.non_resident.
+						compression_unit != 4) {
+					ntfs_error(vi->i_sb, "Found "
+							"non-standard "
+							"compression unit (%u "
+							"instead of 4).  "
+							"Cannot handle this.",
+							a->data.non_resident.
+							compression_unit);
+					err = -EOPNOTSUPP;
+					goto unm_err_out;
+				}
+				if (a->data.non_resident.compression_unit) {
+					ni->itype.compressed.block_size = 1U <<
+							(a->data.non_resident.
+							compression_unit +
+							vol->cluster_size_bits);
+					ni->itype.compressed.block_size_bits =
+							ffs(ni->itype.
+							compressed.
+							block_size) - 1;
+					ni->itype.compressed.block_clusters =
+							1U << a->data.
+							non_resident.
+							compression_unit;
+				} else {
+					ni->itype.compressed.block_size = 0;
+					ni->itype.compressed.block_size_bits =
+							0;
+					ni->itype.compressed.block_clusters =
+							0;
+				}
+				ni->itype.compressed.size = sle64_to_cpu(
+						a->data.non_resident.
+						compressed_size);
+			}
+			if (a->data.non_resident.lowest_vcn) {
+				ntfs_error(vi->i_sb, "First extent of $DATA "
+						"attribute has non zero "
+						"lowest_vcn.");
+				goto unm_err_out;
+			}
+			vi->i_size = sle64_to_cpu(
+					a->data.non_resident.data_size);
+			ni->initialized_size = sle64_to_cpu(
+					a->data.non_resident.initialized_size);
+			ni->allocated_size = sle64_to_cpu(
+					a->data.non_resident.allocated_size);
+		} else { /* Resident attribute. */
+			vi->i_size = ni->initialized_size = le32_to_cpu(
+					a->data.resident.value_length);
+			ni->allocated_size = le32_to_cpu(a->length) -
+					le16_to_cpu(
+					a->data.resident.value_offset);
+			if (vi->i_size > ni->allocated_size) {
+				ntfs_error(vi->i_sb, "Resident data attribute "
+						"is corrupt (size exceeds "
+						"allocation).");
+				goto unm_err_out;
+			}
+		}
+no_data_attr_special_case:
+		/* We are done with the mft record, so we release it. */
+		ntfs_attr_put_search_ctx(ctx);
+		unmap_mft_record(ni);
+		m = NULL;
+		ctx = NULL;
+		/* Setup the operations for this inode. */
+		vi->i_op = &ntfs_file_inode_ops;
+		vi->i_fop = &ntfs_file_ops;
+		vi->i_mapping->a_ops = &ntfs_normal_aops;
+		if (NInoMstProtected(ni))
+			vi->i_mapping->a_ops = &ntfs_mst_aops;
+		else if (NInoCompressed(ni))
+			vi->i_mapping->a_ops = &ntfs_compressed_aops;
+	}
+	/*
+	 * The number of 512-byte blocks used on disk (for stat). This is in so
+	 * far inaccurate as it doesn't account for any named streams or other
+	 * special non-resident attributes, but that is how Windows works, too,
+	 * so we are at least consistent with Windows, if not entirely
+	 * consistent with the Linux Way. Doing it the Linux Way would cause a
+	 * significant slowdown as it would involve iterating over all
+	 * attributes in the mft record and adding the allocated/compressed
+	 * sizes of all non-resident attributes present to give us the Linux
+	 * correct size that should go into i_blocks (after division by 512).
+	 */
+	if (S_ISREG(vi->i_mode) && (NInoCompressed(ni) || NInoSparse(ni)))
+		vi->i_blocks = ni->itype.compressed.size >> 9;
+	else
+		vi->i_blocks = ni->allocated_size >> 9;
+	ntfs_debug("Done.");
+	return 0;
+iput_unm_err_out:
+	iput(bvi);
+unm_err_out:
+	if (!err)
+		err = -EIO;
+	if (ctx)
+		ntfs_attr_put_search_ctx(ctx);
+	if (m)
+		unmap_mft_record(ni);
+err_out:
+	ntfs_error(vol->sb, "Failed with error code %i.  Marking corrupt "
+			"inode 0x%lx as bad.  Run chkdsk.", err, vi->i_ino);
+	make_bad_inode(vi);
+	if (err != -EOPNOTSUPP && err != -ENOMEM)
+		NVolSetErrors(vol);
+	return err;
+}
+
+/**
+ * ntfs_read_locked_attr_inode - read an attribute inode from its base inode
+ * @base_vi:	base inode
+ * @vi:		attribute inode to read
+ *
+ * ntfs_read_locked_attr_inode() is called from ntfs_attr_iget() to read the
+ * attribute inode described by @vi into memory from the base mft record
+ * described by @base_ni.
+ *
+ * ntfs_read_locked_attr_inode() maps, pins and locks the base inode for
+ * reading and looks up the attribute described by @vi before setting up the
+ * necessary fields in @vi as well as initializing the ntfs inode.
+ *
+ * Q: What locks are held when the function is called?
+ * A: i_state has I_NEW set, hence the inode is locked, also
+ *    i_count is set to 1, so it is not going to go away
+ *
+ * Return 0 on success and -errno on error.  In the error case, the inode will
+ * have had make_bad_inode() executed on it.
+ *
+ * Note this cannot be called for AT_INDEX_ALLOCATION.
+ */
+static int ntfs_read_locked_attr_inode(struct inode *base_vi, struct inode *vi)
+{
+	ntfs_volume *vol = NTFS_SB(vi->i_sb);
+	ntfs_inode *ni, *base_ni;
+	MFT_RECORD *m;
+	ATTR_RECORD *a;
+	ntfs_attr_search_ctx *ctx;
+	int err = 0;
+
+	ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
+
+	ntfs_init_big_inode(vi);
+
+	ni	= NTFS_I(vi);
+	base_ni = NTFS_I(base_vi);
+
+	/* Just mirror the values from the base inode. */
+	vi->i_uid	= base_vi->i_uid;
+	vi->i_gid	= base_vi->i_gid;
+	set_nlink(vi, base_vi->i_nlink);
+	vi->i_mtime	= base_vi->i_mtime;
+	inode_set_ctime_to_ts(vi, inode_get_ctime(base_vi));
+	vi->i_atime	= base_vi->i_atime;
+	vi->i_generation = ni->seq_no = base_ni->seq_no;
+
+	/* Set inode type to zero but preserve permissions. */
+	vi->i_mode	= base_vi->i_mode & ~S_IFMT;
+
+	m = map_mft_record(base_ni);
+	if (IS_ERR(m)) {
+		err = PTR_ERR(m);
+		goto err_out;
+	}
+	ctx = ntfs_attr_get_search_ctx(base_ni, m);
+	if (!ctx) {
+		err = -ENOMEM;
+		goto unm_err_out;
+	}
+	/* Find the attribute. */
+	err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+			CASE_SENSITIVE, 0, NULL, 0, ctx);
+	if (unlikely(err))
+		goto unm_err_out;
+	a = ctx->attr;
+	if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_SPARSE)) {
+		if (a->flags & ATTR_COMPRESSION_MASK) {
+			NInoSetCompressed(ni);
+			if ((ni->type != AT_DATA) || (ni->type == AT_DATA &&
+					ni->name_len)) {
+				ntfs_error(vi->i_sb, "Found compressed "
+						"non-data or named data "
+						"attribute.  Please report "
+						"you saw this message to "
+						"linux-ntfs-dev@lists."
+						"sourceforge.net");
+				goto unm_err_out;
+			}
+			if (vol->cluster_size > 4096) {
+				ntfs_error(vi->i_sb, "Found compressed "
+						"attribute but compression is "
+						"disabled due to cluster size "
+						"(%i) > 4kiB.",
+						vol->cluster_size);
+				goto unm_err_out;
+			}
+			if ((a->flags & ATTR_COMPRESSION_MASK) !=
+					ATTR_IS_COMPRESSED) {
+				ntfs_error(vi->i_sb, "Found unknown "
+						"compression method.");
+				goto unm_err_out;
+			}
+		}
+		/*
+		 * The compressed/sparse flag set in an index root just means
+		 * to compress all files.
+		 */
+		if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
+			ntfs_error(vi->i_sb, "Found mst protected attribute "
+					"but the attribute is %s.  Please "
+					"report you saw this message to "
+					"linux-ntfs-dev@lists.sourceforge.net",
+					NInoCompressed(ni) ? "compressed" :
+					"sparse");
+			goto unm_err_out;
+		}
+		if (a->flags & ATTR_IS_SPARSE)
+			NInoSetSparse(ni);
+	}
+	if (a->flags & ATTR_IS_ENCRYPTED) {
+		if (NInoCompressed(ni)) {
+			ntfs_error(vi->i_sb, "Found encrypted and compressed "
+					"data.");
+			goto unm_err_out;
+		}
+		/*
+		 * The encryption flag set in an index root just means to
+		 * encrypt all files.
+		 */
+		if (NInoMstProtected(ni) && ni->type != AT_INDEX_ROOT) {
+			ntfs_error(vi->i_sb, "Found mst protected attribute "
+					"but the attribute is encrypted.  "
+					"Please report you saw this message "
+					"to linux-ntfs-dev@lists.sourceforge."
+					"net");
+			goto unm_err_out;
+		}
+		if (ni->type != AT_DATA) {
+			ntfs_error(vi->i_sb, "Found encrypted non-data "
+					"attribute.");
+			goto unm_err_out;
+		}
+		NInoSetEncrypted(ni);
+	}
+	if (!a->non_resident) {
+		/* Ensure the attribute name is placed before the value. */
+		if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+				le16_to_cpu(a->data.resident.value_offset)))) {
+			ntfs_error(vol->sb, "Attribute name is placed after "
+					"the attribute value.");
+			goto unm_err_out;
+		}
+		if (NInoMstProtected(ni)) {
+			ntfs_error(vi->i_sb, "Found mst protected attribute "
+					"but the attribute is resident.  "
+					"Please report you saw this message to "
+					"linux-ntfs-dev@lists.sourceforge.net");
+			goto unm_err_out;
+		}
+		vi->i_size = ni->initialized_size = le32_to_cpu(
+				a->data.resident.value_length);
+		ni->allocated_size = le32_to_cpu(a->length) -
+				le16_to_cpu(a->data.resident.value_offset);
+		if (vi->i_size > ni->allocated_size) {
+			ntfs_error(vi->i_sb, "Resident attribute is corrupt "
+					"(size exceeds allocation).");
+			goto unm_err_out;
+		}
+	} else {
+		NInoSetNonResident(ni);
+		/*
+		 * Ensure the attribute name is placed before the mapping pairs
+		 * array.
+		 */
+		if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+				le16_to_cpu(
+				a->data.non_resident.mapping_pairs_offset)))) {
+			ntfs_error(vol->sb, "Attribute name is placed after "
+					"the mapping pairs array.");
+			goto unm_err_out;
+		}
+		if (NInoCompressed(ni) || NInoSparse(ni)) {
+			if (NInoCompressed(ni) && a->data.non_resident.
+					compression_unit != 4) {
+				ntfs_error(vi->i_sb, "Found non-standard "
+						"compression unit (%u instead "
+						"of 4).  Cannot handle this.",
+						a->data.non_resident.
+						compression_unit);
+				err = -EOPNOTSUPP;
+				goto unm_err_out;
+			}
+			if (a->data.non_resident.compression_unit) {
+				ni->itype.compressed.block_size = 1U <<
+						(a->data.non_resident.
+						compression_unit +
+						vol->cluster_size_bits);
+				ni->itype.compressed.block_size_bits =
+						ffs(ni->itype.compressed.
+						block_size) - 1;
+				ni->itype.compressed.block_clusters = 1U <<
+						a->data.non_resident.
+						compression_unit;
+			} else {
+				ni->itype.compressed.block_size = 0;
+				ni->itype.compressed.block_size_bits = 0;
+				ni->itype.compressed.block_clusters = 0;
+			}
+			ni->itype.compressed.size = sle64_to_cpu(
+					a->data.non_resident.compressed_size);
+		}
+		if (a->data.non_resident.lowest_vcn) {
+			ntfs_error(vi->i_sb, "First extent of attribute has "
+					"non-zero lowest_vcn.");
+			goto unm_err_out;
+		}
+		vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
+		ni->initialized_size = sle64_to_cpu(
+				a->data.non_resident.initialized_size);
+		ni->allocated_size = sle64_to_cpu(
+				a->data.non_resident.allocated_size);
+	}
+	vi->i_mapping->a_ops = &ntfs_normal_aops;
+	if (NInoMstProtected(ni))
+		vi->i_mapping->a_ops = &ntfs_mst_aops;
+	else if (NInoCompressed(ni))
+		vi->i_mapping->a_ops = &ntfs_compressed_aops;
+	if ((NInoCompressed(ni) || NInoSparse(ni)) && ni->type != AT_INDEX_ROOT)
+		vi->i_blocks = ni->itype.compressed.size >> 9;
+	else
+		vi->i_blocks = ni->allocated_size >> 9;
+	/*
+	 * Make sure the base inode does not go away and attach it to the
+	 * attribute inode.
+	 */
+	igrab(base_vi);
+	ni->ext.base_ntfs_ino = base_ni;
+	ni->nr_extents = -1;
+
+	ntfs_attr_put_search_ctx(ctx);
+	unmap_mft_record(base_ni);
+
+	ntfs_debug("Done.");
+	return 0;
+
+unm_err_out:
+	if (!err)
+		err = -EIO;
+	if (ctx)
+		ntfs_attr_put_search_ctx(ctx);
+	unmap_mft_record(base_ni);
+err_out:
+	ntfs_error(vol->sb, "Failed with error code %i while reading attribute "
+			"inode (mft_no 0x%lx, type 0x%x, name_len %i).  "
+			"Marking corrupt inode and base inode 0x%lx as bad.  "
+			"Run chkdsk.", err, vi->i_ino, ni->type, ni->name_len,
+			base_vi->i_ino);
+	make_bad_inode(vi);
+	if (err != -ENOMEM)
+		NVolSetErrors(vol);
+	return err;
+}
+
+/**
+ * ntfs_read_locked_index_inode - read an index inode from its base inode
+ * @base_vi:	base inode
+ * @vi:		index inode to read
+ *
+ * ntfs_read_locked_index_inode() is called from ntfs_index_iget() to read the
+ * index inode described by @vi into memory from the base mft record described
+ * by @base_ni.
+ *
+ * ntfs_read_locked_index_inode() maps, pins and locks the base inode for
+ * reading and looks up the attributes relating to the index described by @vi
+ * before setting up the necessary fields in @vi as well as initializing the
+ * ntfs inode.
+ *
+ * Note, index inodes are essentially attribute inodes (NInoAttr() is true)
+ * with the attribute type set to AT_INDEX_ALLOCATION.  Apart from that, they
+ * are setup like directory inodes since directories are a special case of
+ * indices ao they need to be treated in much the same way.  Most importantly,
+ * for small indices the index allocation attribute might not actually exist.
+ * However, the index root attribute always exists but this does not need to
+ * have an inode associated with it and this is why we define a new inode type
+ * index.  Also, like for directories, we need to have an attribute inode for
+ * the bitmap attribute corresponding to the index allocation attribute and we
+ * can store this in the appropriate field of the inode, just like we do for
+ * normal directory inodes.
+ *
+ * Q: What locks are held when the function is called?
+ * A: i_state has I_NEW set, hence the inode is locked, also
+ *    i_count is set to 1, so it is not going to go away
+ *
+ * Return 0 on success and -errno on error.  In the error case, the inode will
+ * have had make_bad_inode() executed on it.
+ */
+static int ntfs_read_locked_index_inode(struct inode *base_vi, struct inode *vi)
+{
+	loff_t bvi_size;
+	ntfs_volume *vol = NTFS_SB(vi->i_sb);
+	ntfs_inode *ni, *base_ni, *bni;
+	struct inode *bvi;
+	MFT_RECORD *m;
+	ATTR_RECORD *a;
+	ntfs_attr_search_ctx *ctx;
+	INDEX_ROOT *ir;
+	u8 *ir_end, *index_end;
+	int err = 0;
+
+	ntfs_debug("Entering for i_ino 0x%lx.", vi->i_ino);
+	ntfs_init_big_inode(vi);
+	ni	= NTFS_I(vi);
+	base_ni = NTFS_I(base_vi);
+	/* Just mirror the values from the base inode. */
+	vi->i_uid	= base_vi->i_uid;
+	vi->i_gid	= base_vi->i_gid;
+	set_nlink(vi, base_vi->i_nlink);
+	vi->i_mtime	= base_vi->i_mtime;
+	inode_set_ctime_to_ts(vi, inode_get_ctime(base_vi));
+	vi->i_atime	= base_vi->i_atime;
+	vi->i_generation = ni->seq_no = base_ni->seq_no;
+	/* Set inode type to zero but preserve permissions. */
+	vi->i_mode	= base_vi->i_mode & ~S_IFMT;
+	/* Map the mft record for the base inode. */
+	m = map_mft_record(base_ni);
+	if (IS_ERR(m)) {
+		err = PTR_ERR(m);
+		goto err_out;
+	}
+	ctx = ntfs_attr_get_search_ctx(base_ni, m);
+	if (!ctx) {
+		err = -ENOMEM;
+		goto unm_err_out;
+	}
+	/* Find the index root attribute. */
+	err = ntfs_attr_lookup(AT_INDEX_ROOT, ni->name, ni->name_len,
+			CASE_SENSITIVE, 0, NULL, 0, ctx);
+	if (unlikely(err)) {
+		if (err == -ENOENT)
+			ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is "
+					"missing.");
+		goto unm_err_out;
+	}
+	a = ctx->attr;
+	/* Set up the state. */
+	if (unlikely(a->non_resident)) {
+		ntfs_error(vol->sb, "$INDEX_ROOT attribute is not resident.");
+		goto unm_err_out;
+	}
+	/* Ensure the attribute name is placed before the value. */
+	if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+			le16_to_cpu(a->data.resident.value_offset)))) {
+		ntfs_error(vol->sb, "$INDEX_ROOT attribute name is placed "
+				"after the attribute value.");
+		goto unm_err_out;
+	}
+	/*
+	 * Compressed/encrypted/sparse index root is not allowed, except for
+	 * directories of course but those are not dealt with here.
+	 */
+	if (a->flags & (ATTR_COMPRESSION_MASK | ATTR_IS_ENCRYPTED |
+			ATTR_IS_SPARSE)) {
+		ntfs_error(vi->i_sb, "Found compressed/encrypted/sparse index "
+				"root attribute.");
+		goto unm_err_out;
+	}
+	ir = (INDEX_ROOT*)((u8*)a + le16_to_cpu(a->data.resident.value_offset));
+	ir_end = (u8*)ir + le32_to_cpu(a->data.resident.value_length);
+	if (ir_end > (u8*)ctx->mrec + vol->mft_record_size) {
+		ntfs_error(vi->i_sb, "$INDEX_ROOT attribute is corrupt.");
+		goto unm_err_out;
+	}
+	index_end = (u8*)&ir->index + le32_to_cpu(ir->index.index_length);
+	if (index_end > ir_end) {
+		ntfs_error(vi->i_sb, "Index is corrupt.");
+		goto unm_err_out;
+	}
+	if (ir->type) {
+		ntfs_error(vi->i_sb, "Index type is not 0 (type is 0x%x).",
+				le32_to_cpu(ir->type));
+		goto unm_err_out;
+	}
+	ni->itype.index.collation_rule = ir->collation_rule;
+	ntfs_debug("Index collation rule is 0x%x.",
+			le32_to_cpu(ir->collation_rule));
+	ni->itype.index.block_size = le32_to_cpu(ir->index_block_size);
+	if (!is_power_of_2(ni->itype.index.block_size)) {
+		ntfs_error(vi->i_sb, "Index block size (%u) is not a power of "
+				"two.", ni->itype.index.block_size);
+		goto unm_err_out;
+	}
+	if (ni->itype.index.block_size > PAGE_SIZE) {
+		ntfs_error(vi->i_sb, "Index block size (%u) > PAGE_SIZE "
+				"(%ld) is not supported.  Sorry.",
+				ni->itype.index.block_size, PAGE_SIZE);
+		err = -EOPNOTSUPP;
+		goto unm_err_out;
+	}
+	if (ni->itype.index.block_size < NTFS_BLOCK_SIZE) {
+		ntfs_error(vi->i_sb, "Index block size (%u) < NTFS_BLOCK_SIZE "
+				"(%i) is not supported.  Sorry.",
+				ni->itype.index.block_size, NTFS_BLOCK_SIZE);
+		err = -EOPNOTSUPP;
+		goto unm_err_out;
+	}
+	ni->itype.index.block_size_bits = ffs(ni->itype.index.block_size) - 1;
+	/* Determine the size of a vcn in the index. */
+	if (vol->cluster_size <= ni->itype.index.block_size) {
+		ni->itype.index.vcn_size = vol->cluster_size;
+		ni->itype.index.vcn_size_bits = vol->cluster_size_bits;
+	} else {
+		ni->itype.index.vcn_size = vol->sector_size;
+		ni->itype.index.vcn_size_bits = vol->sector_size_bits;
+	}
+	/* Check for presence of index allocation attribute. */
+	if (!(ir->index.flags & LARGE_INDEX)) {
+		/* No index allocation. */
+		vi->i_size = ni->initialized_size = ni->allocated_size = 0;
+		/* We are done with the mft record, so we release it. */
+		ntfs_attr_put_search_ctx(ctx);
+		unmap_mft_record(base_ni);
+		m = NULL;
+		ctx = NULL;
+		goto skip_large_index_stuff;
+	} /* LARGE_INDEX:  Index allocation present.  Setup state. */
+	NInoSetIndexAllocPresent(ni);
+	/* Find index allocation attribute. */
+	ntfs_attr_reinit_search_ctx(ctx);
+	err = ntfs_attr_lookup(AT_INDEX_ALLOCATION, ni->name, ni->name_len,
+			CASE_SENSITIVE, 0, NULL, 0, ctx);
+	if (unlikely(err)) {
+		if (err == -ENOENT)
+			ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+					"not present but $INDEX_ROOT "
+					"indicated it is.");
+		else
+			ntfs_error(vi->i_sb, "Failed to lookup "
+					"$INDEX_ALLOCATION attribute.");
+		goto unm_err_out;
+	}
+	a = ctx->attr;
+	if (!a->non_resident) {
+		ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+				"resident.");
+		goto unm_err_out;
+	}
+	/*
+	 * Ensure the attribute name is placed before the mapping pairs array.
+	 */
+	if (unlikely(a->name_length && (le16_to_cpu(a->name_offset) >=
+			le16_to_cpu(
+			a->data.non_resident.mapping_pairs_offset)))) {
+		ntfs_error(vol->sb, "$INDEX_ALLOCATION attribute name is "
+				"placed after the mapping pairs array.");
+		goto unm_err_out;
+	}
+	if (a->flags & ATTR_IS_ENCRYPTED) {
+		ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+				"encrypted.");
+		goto unm_err_out;
+	}
+	if (a->flags & ATTR_IS_SPARSE) {
+		ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is sparse.");
+		goto unm_err_out;
+	}
+	if (a->flags & ATTR_COMPRESSION_MASK) {
+		ntfs_error(vi->i_sb, "$INDEX_ALLOCATION attribute is "
+				"compressed.");
+		goto unm_err_out;
+	}
+	if (a->data.non_resident.lowest_vcn) {
+		ntfs_error(vi->i_sb, "First extent of $INDEX_ALLOCATION "
+				"attribute has non zero lowest_vcn.");
+		goto unm_err_out;
+	}
+	vi->i_size = sle64_to_cpu(a->data.non_resident.data_size);
+	ni->initialized_size = sle64_to_cpu(
+			a->data.non_resident.initialized_size);
+	ni->allocated_size = sle64_to_cpu(a->data.non_resident.allocated_size);
+	/*
+	 * We are done with the mft record, so we release it.  Otherwise
+	 * we would deadlock in ntfs_attr_iget().
+	 */
+	ntfs_attr_put_search_ctx(ctx);
+	unmap_mft_record(base_ni);
+	m = NULL;
+	ctx = NULL;
+	/* Get the index bitmap attribute inode. */
+	bvi = ntfs_attr_iget(base_vi, AT_BITMAP, ni->name, ni->name_len);
+	if (IS_ERR(bvi)) {
+		ntfs_error(vi->i_sb, "Failed to get bitmap attribute.");
+		err = PTR_ERR(bvi);
+		goto unm_err_out;
+	}
+	bni = NTFS_I(bvi);
+	if (NInoCompressed(bni) || NInoEncrypted(bni) ||
+			NInoSparse(bni)) {
+		ntfs_error(vi->i_sb, "$BITMAP attribute is compressed and/or "
+				"encrypted and/or sparse.");
+		goto iput_unm_err_out;
+	}
+	/* Consistency check bitmap size vs. index allocation size. */
+	bvi_size = i_size_read(bvi);
+	if ((bvi_size << 3) < (vi->i_size >> ni->itype.index.block_size_bits)) {
+		ntfs_error(vi->i_sb, "Index bitmap too small (0x%llx) for "
+				"index allocation (0x%llx).", bvi_size << 3,
+				vi->i_size);
+		goto iput_unm_err_out;
+	}
+	iput(bvi);
+skip_large_index_stuff:
+	/* Setup the operations for this index inode. */
+	vi->i_mapping->a_ops = &ntfs_mst_aops;
+	vi->i_blocks = ni->allocated_size >> 9;
+	/*
+	 * Make sure the base inode doesn't go away and attach it to the
+	 * index inode.
+	 */
+	igrab(base_vi);
+	ni->ext.base_ntfs_ino = base_ni;
+	ni->nr_extents = -1;
+
+	ntfs_debug("Done.");
+	return 0;
+iput_unm_err_out:
+	iput(bvi);
+unm_err_out:
+	if (!err)
+		err = -EIO;
+	if (ctx)
+		ntfs_attr_put_search_ctx(ctx);
+	if (m)
+		unmap_mft_record(base_ni);
+err_out:
+	ntfs_error(vi->i_sb, "Failed with error code %i while reading index "
+			"inode (mft_no 0x%lx, name_len %i.", err, vi->i_ino,
+			ni->name_len);
+	make_bad_inode(vi);
+	if (err != -EOPNOTSUPP && err != -ENOMEM)
+		NVolSetErrors(vol);
+	return err;
+}
+
+/*
+ * The MFT inode has special locking, so teach the lock validator
+ * about this by splitting off the locking rules of the MFT from
+ * the locking rules of other inodes. The MFT inode can never be
+ * accessed from the VFS side (or even internally), only by the
+ * map_mft functions.
+ */
+static struct lock_class_key mft_ni_runlist_lock_key, mft_ni_mrec_lock_key;
+
+/**
+ * ntfs_read_inode_mount - special read_inode for mount time use only
+ * @vi:		inode to read
+ *
+ * Read inode FILE_MFT at mount time, only called with super_block lock
+ * held from within the read_super() code path.
+ *
+ * This function exists because when it is called the page cache for $MFT/$DATA
+ * is not initialized and hence we cannot get at the contents of mft records
+ * by calling map_mft_record*().
+ *
+ * Further it needs to cope with the circular references problem, i.e. cannot
+ * load any attributes other than $ATTRIBUTE_LIST until $DATA is loaded, because
+ * we do not know where the other extent mft records are yet and again, because
+ * we cannot call map_mft_record*() yet.  Obviously this applies only when an
+ * attribute list is actually present in $MFT inode.
+ *
+ * We solve these problems by starting with the $DATA attribute before anything
+ * else and iterating using ntfs_attr_lookup($DATA) over all extents.  As each
+ * extent is found, we ntfs_mapping_pairs_decompress() including the implied
+ * ntfs_runlists_merge().  Each step of the iteration necessarily provides
+ * sufficient information for the next step to complete.
+ *
+ * This should work but there are two possible pit falls (see inline comments
+ * below), but only time will tell if they are real pits or just smoke...
+ */
+int ntfs_read_inode_mount(struct inode *vi)
+{
+	VCN next_vcn, last_vcn, highest_vcn;
+	s64 block;
+	struct super_block *sb = vi->i_sb;
+	ntfs_volume *vol = NTFS_SB(sb);
+	struct buffer_head *bh;
+	ntfs_inode *ni;
+	MFT_RECORD *m = NULL;
+	ATTR_RECORD *a;
+	ntfs_attr_search_ctx *ctx;
+	unsigned int i, nr_blocks;
+	int err;
+
+	ntfs_debug("Entering.");
+
+	/* Initialize the ntfs specific part of @vi. */
+	ntfs_init_big_inode(vi);
+
+	ni = NTFS_I(vi);
+
+	/* Setup the data attribute. It is special as it is mst protected. */
+	NInoSetNonResident(ni);
+	NInoSetMstProtected(ni);
+	NInoSetSparseDisabled(ni);
+	ni->type = AT_DATA;
+	ni->name = NULL;
+	ni->name_len = 0;
+	/*
+	 * This sets up our little cheat allowing us to reuse the async read io
+	 * completion handler for directories.
+	 */
+	ni->itype.index.block_size = vol->mft_record_size;
+	ni->itype.index.block_size_bits = vol->mft_record_size_bits;
+
+	/* Very important! Needed to be able to call map_mft_record*(). */
+	vol->mft_ino = vi;
+
+	/* Allocate enough memory to read the first mft record. */
+	if (vol->mft_record_size > 64 * 1024) {
+		ntfs_error(sb, "Unsupported mft record size %i (max 64kiB).",
+				vol->mft_record_size);
+		goto err_out;
+	}
+	i = vol->mft_record_size;
+	if (i < sb->s_blocksize)
+		i = sb->s_blocksize;
+	m = (MFT_RECORD*)ntfs_malloc_nofs(i);
+	if (!m) {
+		ntfs_error(sb, "Failed to allocate buffer for $MFT record 0.");
+		goto err_out;
+	}
+
+	/* Determine the first block of the $MFT/$DATA attribute. */
+	block = vol->mft_lcn << vol->cluster_size_bits >>
+			sb->s_blocksize_bits;
+	nr_blocks = vol->mft_record_size >> sb->s_blocksize_bits;
+	if (!nr_blocks)
+		nr_blocks = 1;
+
+	/* Load $MFT/$DATA's first mft record. */
+	for (i = 0; i < nr_blocks; i++) {
+		bh = sb_bread(sb, block++);
+		if (!bh) {
+			ntfs_error(sb, "Device read failed.");
+			goto err_out;
+		}
+		memcpy((char*)m + (i << sb->s_blocksize_bits), bh->b_data,
+				sb->s_blocksize);
+		brelse(bh);
+	}
+
+	if (le32_to_cpu(m->bytes_allocated) != vol->mft_record_size) {
+		ntfs_error(sb, "Incorrect mft record size %u in superblock, should be %u.",
+				le32_to_cpu(m->bytes_allocated), vol->mft_record_size);
+		goto err_out;
+	}
+
+	/* Apply the mst fixups. */
+	if (post_read_mst_fixup((NTFS_RECORD*)m, vol->mft_record_size)) {
+		/* FIXME: Try to use the $MFTMirr now. */
+		ntfs_error(sb, "MST fixup failed. $MFT is corrupt.");
+		goto err_out;
+	}
+
+	/* Sanity check offset to the first attribute */
+	if (le16_to_cpu(m->attrs_offset) >= le32_to_cpu(m->bytes_allocated)) {
+		ntfs_error(sb, "Incorrect mft offset to the first attribute %u in superblock.",
+			       le16_to_cpu(m->attrs_offset));
+		goto err_out;
+	}
+
+	/* Need this to sanity check attribute list references to $MFT. */
+	vi->i_generation = ni->seq_no = le16_to_cpu(m->sequence_number);
+
+	/* Provides read_folio() for map_mft_record(). */
+	vi->i_mapping->a_ops = &ntfs_mst_aops;
+
+	ctx = ntfs_attr_get_search_ctx(ni, m);
+	if (!ctx) {
+		err = -ENOMEM;
+		goto err_out;
+	}
+
+	/* Find the attribute list attribute if present. */
+	err = ntfs_attr_lookup(AT_ATTRIBUTE_LIST, NULL, 0, 0, 0, NULL, 0, ctx);
+	if (err) {
+		if (unlikely(err != -ENOENT)) {
+			ntfs_error(sb, "Failed to lookup attribute list "
+					"attribute. You should run chkdsk.");
+			goto put_err_out;
+		}
+	} else /* if (!err) */ {
+		ATTR_LIST_ENTRY *al_entry, *next_al_entry;
+		u8 *al_end;
+		static const char *es = "  Not allowed.  $MFT is corrupt.  "
+				"You should run chkdsk.";
+
+		ntfs_debug("Attribute list attribute found in $MFT.");
+		NInoSetAttrList(ni);
+		a = ctx->attr;
+		if (a->flags & ATTR_COMPRESSION_MASK) {
+			ntfs_error(sb, "Attribute list attribute is "
+					"compressed.%s", es);
+			goto put_err_out;
+		}
+		if (a->flags & ATTR_IS_ENCRYPTED ||
+				a->flags & ATTR_IS_SPARSE) {
+			if (a->non_resident) {
+				ntfs_error(sb, "Non-resident attribute list "
+						"attribute is encrypted/"
+						"sparse.%s", es);
+				goto put_err_out;
+			}
+			ntfs_warning(sb, "Resident attribute list attribute "
+					"in $MFT system file is marked "
+					"encrypted/sparse which is not true.  "
+					"However, Windows allows this and "
+					"chkdsk does not detect or correct it "
+					"so we will just ignore the invalid "
+					"flags and pretend they are not set.");
+		}
+		/* Now allocate memory for the attribute list. */
+		ni->attr_list_size = (u32)ntfs_attr_size(a);
+		if (!ni->attr_list_size) {
+			ntfs_error(sb, "Attr_list_size is zero");
+			goto put_err_out;
+		}
+		ni->attr_list = ntfs_malloc_nofs(ni->attr_list_size);
+		if (!ni->attr_list) {
+			ntfs_error(sb, "Not enough memory to allocate buffer "
+					"for attribute list.");
+			goto put_err_out;
+		}
+		if (a->non_resident) {
+			NInoSetAttrListNonResident(ni);
+			if (a->data.non_resident.lowest_vcn) {
+				ntfs_error(sb, "Attribute list has non zero "
+						"lowest_vcn. $MFT is corrupt. "
+						"You should run chkdsk.");
+				goto put_err_out;
+			}
+			/* Setup the runlist. */
+			ni->attr_list_rl.rl = ntfs_mapping_pairs_decompress(vol,
+					a, NULL);
+			if (IS_ERR(ni->attr_list_rl.rl)) {
+				err = PTR_ERR(ni->attr_list_rl.rl);
+				ni->attr_list_rl.rl = NULL;
+				ntfs_error(sb, "Mapping pairs decompression "
+						"failed with error code %i.",
+						-err);
+				goto put_err_out;
+			}
+			/* Now load the attribute list. */
+			if ((err = load_attribute_list(vol, &ni->attr_list_rl,
+					ni->attr_list, ni->attr_list_size,
+					sle64_to_cpu(a->data.
+					non_resident.initialized_size)))) {
+				ntfs_error(sb, "Failed to load attribute list "
+						"attribute with error code %i.",
+						-err);
+				goto put_err_out;
+			}
+		} else /* if (!ctx.attr->non_resident) */ {
+			if ((u8*)a + le16_to_cpu(
+					a->data.resident.value_offset) +
+					le32_to_cpu(
+					a->data.resident.value_length) >
+					(u8*)ctx->mrec + vol->mft_record_size) {
+				ntfs_error(sb, "Corrupt attribute list "
+						"attribute.");
+				goto put_err_out;
+			}
+			/* Now copy the attribute list. */
+			memcpy(ni->attr_list, (u8*)a + le16_to_cpu(
+					a->data.resident.value_offset),
+					le32_to_cpu(
+					a->data.resident.value_length));
+		}
+		/* The attribute list is now setup in memory. */
+		/*
+		 * FIXME: I don't know if this case is actually possible.
+		 * According to logic it is not possible but I have seen too
+		 * many weird things in MS software to rely on logic... Thus we
+		 * perform a manual search and make sure the first $MFT/$DATA
+		 * extent is in the base inode. If it is not we abort with an
+		 * error and if we ever see a report of this error we will need
+		 * to do some magic in order to have the necessary mft record
+		 * loaded and in the right place in the page cache. But
+		 * hopefully logic will prevail and this never happens...
+		 */
+		al_entry = (ATTR_LIST_ENTRY*)ni->attr_list;
+		al_end = (u8*)al_entry + ni->attr_list_size;
+		for (;; al_entry = next_al_entry) {
+			/* Out of bounds check. */
+			if ((u8*)al_entry < ni->attr_list ||
+					(u8*)al_entry > al_end)
+				goto em_put_err_out;
+			/* Catch the end of the attribute list. */
+			if ((u8*)al_entry == al_end)
+				goto em_put_err_out;
+			if (!al_entry->length)
+				goto em_put_err_out;
+			if ((u8*)al_entry + 6 > al_end || (u8*)al_entry +
+					le16_to_cpu(al_entry->length) > al_end)
+				goto em_put_err_out;
+			next_al_entry = (ATTR_LIST_ENTRY*)((u8*)al_entry +
+					le16_to_cpu(al_entry->length));
+			if (le32_to_cpu(al_entry->type) > le32_to_cpu(AT_DATA))
+				goto em_put_err_out;
+			if (AT_DATA != al_entry->type)
+				continue;
+			/* We want an unnamed attribute. */
+			if (al_entry->name_length)
+				goto em_put_err_out;
+			/* Want the first entry, i.e. lowest_vcn == 0. */
+			if (al_entry->lowest_vcn)
+				goto em_put_err_out;
+			/* First entry has to be in the base mft record. */
+			if (MREF_LE(al_entry->mft_reference) != vi->i_ino) {
+				/* MFT references do not match, logic fails. */
+				ntfs_error(sb, "BUG: The first $DATA extent "
+						"of $MFT is not in the base "
+						"mft record. Please report "
+						"you saw this message to "
+						"linux-ntfs-dev@lists."
+						"sourceforge.net");
+				goto put_err_out;
+			} else {
+				/* Sequence numbers must match. */
+				if (MSEQNO_LE(al_entry->mft_reference) !=
+						ni->seq_no)
+					goto em_put_err_out;
+				/* Got it. All is ok. We can stop now. */
+				break;
+			}
+		}
+	}
+
+	ntfs_attr_reinit_search_ctx(ctx);
+
+	/* Now load all attribute extents. */
+	a = NULL;
+	next_vcn = last_vcn = highest_vcn = 0;
+	while (!(err = ntfs_attr_lookup(AT_DATA, NULL, 0, 0, next_vcn, NULL, 0,
+			ctx))) {
+		runlist_element *nrl;
+
+		/* Cache the current attribute. */
+		a = ctx->attr;
+		/* $MFT must be non-resident. */
+		if (!a->non_resident) {
+			ntfs_error(sb, "$MFT must be non-resident but a "
+					"resident extent was found. $MFT is "
+					"corrupt. Run chkdsk.");
+			goto put_err_out;
+		}
+		/* $MFT must be uncompressed and unencrypted. */
+		if (a->flags & ATTR_COMPRESSION_MASK ||
+				a->flags & ATTR_IS_ENCRYPTED ||
+				a->flags & ATTR_IS_SPARSE) {
+			ntfs_error(sb, "$MFT must be uncompressed, "
+					"non-sparse, and unencrypted but a "
+					"compressed/sparse/encrypted extent "
+					"was found. $MFT is corrupt. Run "
+					"chkdsk.");
+			goto put_err_out;
+		}
+		/*
+		 * Decompress the mapping pairs array of this extent and merge
+		 * the result into the existing runlist. No need for locking
+		 * as we have exclusive access to the inode at this time and we
+		 * are a mount in progress task, too.
+		 */
+		nrl = ntfs_mapping_pairs_decompress(vol, a, ni->runlist.rl);
+		if (IS_ERR(nrl)) {
+			ntfs_error(sb, "ntfs_mapping_pairs_decompress() "
+					"failed with error code %ld.  $MFT is "
+					"corrupt.", PTR_ERR(nrl));
+			goto put_err_out;
+		}
+		ni->runlist.rl = nrl;
+
+		/* Are we in the first extent? */
+		if (!next_vcn) {
+			if (a->data.non_resident.lowest_vcn) {
+				ntfs_error(sb, "First extent of $DATA "
+						"attribute has non zero "
+						"lowest_vcn. $MFT is corrupt. "
+						"You should run chkdsk.");
+				goto put_err_out;
+			}
+			/* Get the last vcn in the $DATA attribute. */
+			last_vcn = sle64_to_cpu(
+					a->data.non_resident.allocated_size)
+					>> vol->cluster_size_bits;
+			/* Fill in the inode size. */
+			vi->i_size = sle64_to_cpu(
+					a->data.non_resident.data_size);
+			ni->initialized_size = sle64_to_cpu(
+					a->data.non_resident.initialized_size);
+			ni->allocated_size = sle64_to_cpu(
+					a->data.non_resident.allocated_size);
+			/*
+			 * Verify the number of mft records does not exceed
+			 * 2^32 - 1.
+			 */
+			if ((vi->i_size >> vol->mft_record_size_bits) >=
+					(1ULL << 32)) {
+				ntfs_error(sb, "$MFT is too big! Aborting.");
+				goto put_err_out;
+			}
+			/*
+			 * We have got the first extent of the runlist for
+			 * $MFT which means it is now relatively safe to call
+			 * the normal ntfs_read_inode() function.
+			 * Complete reading the inode, this will actually
+			 * re-read the mft record for $MFT, this time entering
+			 * it into the page cache with which we complete the
+			 * kick start of the volume. It should be safe to do
+			 * this now as the first extent of $MFT/$DATA is
+			 * already known and we would hope that we don't need
+			 * further extents in order to find the other
+			 * attributes belonging to $MFT. Only time will tell if
+			 * this is really the case. If not we will have to play
+			 * magic at this point, possibly duplicating a lot of
+			 * ntfs_read_inode() at this point. We will need to
+			 * ensure we do enough of its work to be able to call
+			 * ntfs_read_inode() on extents of $MFT/$DATA. But lets
+			 * hope this never happens...
+			 */
+			ntfs_read_locked_inode(vi);
+			if (is_bad_inode(vi)) {
+				ntfs_error(sb, "ntfs_read_inode() of $MFT "
+						"failed. BUG or corrupt $MFT. "
+						"Run chkdsk and if no errors "
+						"are found, please report you "
+						"saw this message to "
+						"linux-ntfs-dev@lists."
+						"sourceforge.net");
+				ntfs_attr_put_search_ctx(ctx);
+				/* Revert to the safe super operations. */
+				ntfs_free(m);
+				return -1;
+			}
+			/*
+			 * Re-initialize some specifics about $MFT's inode as
+			 * ntfs_read_inode() will have set up the default ones.
+			 */
+			/* Set uid and gid to root. */
+			vi->i_uid = GLOBAL_ROOT_UID;
+			vi->i_gid = GLOBAL_ROOT_GID;
+			/* Regular file. No access for anyone. */
+			vi->i_mode = S_IFREG;
+			/* No VFS initiated operations allowed for $MFT. */
+			vi->i_op = &ntfs_empty_inode_ops;
+			vi->i_fop = &ntfs_empty_file_ops;
+		}
+
+		/* Get the lowest vcn for the next extent. */
+		highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
+		next_vcn = highest_vcn + 1;
+
+		/* Only one extent or error, which we catch below. */
+		if (next_vcn <= 0)
+			break;
+
+		/* Avoid endless loops due to corruption. */
+		if (next_vcn < sle64_to_cpu(
+				a->data.non_resident.lowest_vcn)) {
+			ntfs_error(sb, "$MFT has corrupt attribute list "
+					"attribute. Run chkdsk.");
+			goto put_err_out;
+		}
+	}
+	if (err != -ENOENT) {
+		ntfs_error(sb, "Failed to lookup $MFT/$DATA attribute extent. "
+				"$MFT is corrupt. Run chkdsk.");
+		goto put_err_out;
+	}
+	if (!a) {
+		ntfs_error(sb, "$MFT/$DATA attribute not found. $MFT is "
+				"corrupt. Run chkdsk.");
+		goto put_err_out;
+	}
+	if (highest_vcn && highest_vcn != last_vcn - 1) {
+		ntfs_error(sb, "Failed to load the complete runlist for "
+				"$MFT/$DATA. Driver bug or corrupt $MFT. "
+				"Run chkdsk.");
+		ntfs_debug("highest_vcn = 0x%llx, last_vcn - 1 = 0x%llx",
+				(unsigned long long)highest_vcn,
+				(unsigned long long)last_vcn - 1);
+		goto put_err_out;
+	}
+	ntfs_attr_put_search_ctx(ctx);
+	ntfs_debug("Done.");
+	ntfs_free(m);
+
+	/*
+	 * Split the locking rules of the MFT inode from the
+	 * locking rules of other inodes:
+	 */
+	lockdep_set_class(&ni->runlist.lock, &mft_ni_runlist_lock_key);
+	lockdep_set_class(&ni->mrec_lock, &mft_ni_mrec_lock_key);
+
+	return 0;
+
+em_put_err_out:
+	ntfs_error(sb, "Couldn't find first extent of $DATA attribute in "
+			"attribute list. $MFT is corrupt. Run chkdsk.");
+put_err_out:
+	ntfs_attr_put_search_ctx(ctx);
+err_out:
+	ntfs_error(sb, "Failed. Marking inode as bad.");
+	make_bad_inode(vi);
+	ntfs_free(m);
+	return -1;
+}
+
+static void __ntfs_clear_inode(ntfs_inode *ni)
+{
+	/* Free all alocated memory. */
+	down_write(&ni->runlist.lock);
+	if (ni->runlist.rl) {
+		ntfs_free(ni->runlist.rl);
+		ni->runlist.rl = NULL;
+	}
+	up_write(&ni->runlist.lock);
+
+	if (ni->attr_list) {
+		ntfs_free(ni->attr_list);
+		ni->attr_list = NULL;
+	}
+
+	down_write(&ni->attr_list_rl.lock);
+	if (ni->attr_list_rl.rl) {
+		ntfs_free(ni->attr_list_rl.rl);
+		ni->attr_list_rl.rl = NULL;
+	}
+	up_write(&ni->attr_list_rl.lock);
+
+	if (ni->name_len && ni->name != I30) {
+		/* Catch bugs... */
+		BUG_ON(!ni->name);
+		kfree(ni->name);
+	}
+}
+
+void ntfs_clear_extent_inode(ntfs_inode *ni)
+{
+	ntfs_debug("Entering for inode 0x%lx.", ni->mft_no);
+
+	BUG_ON(NInoAttr(ni));
+	BUG_ON(ni->nr_extents != -1);
+
+#ifdef NTFS_RW
+	if (NInoDirty(ni)) {
+		if (!is_bad_inode(VFS_I(ni->ext.base_ntfs_ino)))
+			ntfs_error(ni->vol->sb, "Clearing dirty extent inode!  "
+					"Losing data!  This is a BUG!!!");
+		// FIXME:  Do something!!!
+	}
+#endif /* NTFS_RW */
+
+	__ntfs_clear_inode(ni);
+
+	/* Bye, bye... */
+	ntfs_destroy_extent_inode(ni);
+}
+
+/**
+ * ntfs_evict_big_inode - clean up the ntfs specific part of an inode
+ * @vi:		vfs inode pending annihilation
+ *
+ * When the VFS is going to remove an inode from memory, ntfs_clear_big_inode()
+ * is called, which deallocates all memory belonging to the NTFS specific part
+ * of the inode and returns.
+ *
+ * If the MFT record is dirty, we commit it before doing anything else.
+ */
+void ntfs_evict_big_inode(struct inode *vi)
+{
+	ntfs_inode *ni = NTFS_I(vi);
+
+	truncate_inode_pages_final(&vi->i_data);
+	clear_inode(vi);
+
+#ifdef NTFS_RW
+	if (NInoDirty(ni)) {
+		bool was_bad = (is_bad_inode(vi));
+
+		/* Committing the inode also commits all extent inodes. */
+		ntfs_commit_inode(vi);
+
+		if (!was_bad && (is_bad_inode(vi) || NInoDirty(ni))) {
+			ntfs_error(vi->i_sb, "Failed to commit dirty inode "
+					"0x%lx.  Losing data!", vi->i_ino);
+			// FIXME:  Do something!!!
+		}
+	}
+#endif /* NTFS_RW */
+
+	/* No need to lock at this stage as no one else has a reference. */
+	if (ni->nr_extents > 0) {
+		int i;
+
+		for (i = 0; i < ni->nr_extents; i++)
+			ntfs_clear_extent_inode(ni->ext.extent_ntfs_inos[i]);
+		kfree(ni->ext.extent_ntfs_inos);
+	}
+
+	__ntfs_clear_inode(ni);
+
+	if (NInoAttr(ni)) {
+		/* Release the base inode if we are holding it. */
+		if (ni->nr_extents == -1) {
+			iput(VFS_I(ni->ext.base_ntfs_ino));
+			ni->nr_extents = 0;
+			ni->ext.base_ntfs_ino = NULL;
+		}
+	}
+	BUG_ON(ni->page);
+	if (!atomic_dec_and_test(&ni->count))
+		BUG();
+	return;
+}
+
+/**
+ * ntfs_show_options - show mount options in /proc/mounts
+ * @sf:		seq_file in which to write our mount options
+ * @root:	root of the mounted tree whose mount options to display
+ *
+ * Called by the VFS once for each mounted ntfs volume when someone reads
+ * /proc/mounts in order to display the NTFS specific mount options of each
+ * mount. The mount options of fs specified by @root are written to the seq file
+ * @sf and success is returned.
+ */
+int ntfs_show_options(struct seq_file *sf, struct dentry *root)
+{
+	ntfs_volume *vol = NTFS_SB(root->d_sb);
+	int i;
+
+	seq_printf(sf, ",uid=%i", from_kuid_munged(&init_user_ns, vol->uid));
+	seq_printf(sf, ",gid=%i", from_kgid_munged(&init_user_ns, vol->gid));
+	if (vol->fmask == vol->dmask)
+		seq_printf(sf, ",umask=0%o", vol->fmask);
+	else {
+		seq_printf(sf, ",fmask=0%o", vol->fmask);
+		seq_printf(sf, ",dmask=0%o", vol->dmask);
+	}
+	seq_printf(sf, ",nls=%s", vol->nls_map->charset);
+	if (NVolCaseSensitive(vol))
+		seq_printf(sf, ",case_sensitive");
+	if (NVolShowSystemFiles(vol))
+		seq_printf(sf, ",show_sys_files");
+	if (!NVolSparseEnabled(vol))
+		seq_printf(sf, ",disable_sparse");
+	for (i = 0; on_errors_arr[i].val; i++) {
+		if (on_errors_arr[i].val & vol->on_errors)
+			seq_printf(sf, ",errors=%s", on_errors_arr[i].str);
+	}
+	seq_printf(sf, ",mft_zone_multiplier=%i", vol->mft_zone_multiplier);
+	return 0;
+}
+
+#ifdef NTFS_RW
+
+static const char *es = "  Leaving inconsistent metadata.  Unmount and run "
+		"chkdsk.";
+
+/**
+ * ntfs_truncate - called when the i_size of an ntfs inode is changed
+ * @vi:		inode for which the i_size was changed
+ *
+ * We only support i_size changes for normal files at present, i.e. not
+ * compressed and not encrypted.  This is enforced in ntfs_setattr(), see
+ * below.
+ *
+ * The kernel guarantees that @vi is a regular file (S_ISREG() is true) and
+ * that the change is allowed.
+ *
+ * This implies for us that @vi is a file inode rather than a directory, index,
+ * or attribute inode as well as that @vi is a base inode.
+ *
+ * Returns 0 on success or -errno on error.
+ *
+ * Called with ->i_mutex held.
+ */
+int ntfs_truncate(struct inode *vi)
+{
+	s64 new_size, old_size, nr_freed, new_alloc_size, old_alloc_size;
+	VCN highest_vcn;
+	unsigned long flags;
+	ntfs_inode *base_ni, *ni = NTFS_I(vi);
+	ntfs_volume *vol = ni->vol;
+	ntfs_attr_search_ctx *ctx;
+	MFT_RECORD *m;
+	ATTR_RECORD *a;
+	const char *te = "  Leaving file length out of sync with i_size.";
+	int err, mp_size, size_change, alloc_change;
+
+	ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
+	BUG_ON(NInoAttr(ni));
+	BUG_ON(S_ISDIR(vi->i_mode));
+	BUG_ON(NInoMstProtected(ni));
+	BUG_ON(ni->nr_extents < 0);
+retry_truncate:
+	/*
+	 * Lock the runlist for writing and map the mft record to ensure it is
+	 * safe to mess with the attribute runlist and sizes.
+	 */
+	down_write(&ni->runlist.lock);
+	if (!NInoAttr(ni))
+		base_ni = ni;
+	else
+		base_ni = ni->ext.base_ntfs_ino;
+	m = map_mft_record(base_ni);
+	if (IS_ERR(m)) {
+		err = PTR_ERR(m);
+		ntfs_error(vi->i_sb, "Failed to map mft record for inode 0x%lx "
+				"(error code %d).%s", vi->i_ino, err, te);
+		ctx = NULL;
+		m = NULL;
+		goto old_bad_out;
+	}
+	ctx = ntfs_attr_get_search_ctx(base_ni, m);
+	if (unlikely(!ctx)) {
+		ntfs_error(vi->i_sb, "Failed to allocate a search context for "
+				"inode 0x%lx (not enough memory).%s",
+				vi->i_ino, te);
+		err = -ENOMEM;
+		goto old_bad_out;
+	}
+	err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
+			CASE_SENSITIVE, 0, NULL, 0, ctx);
+	if (unlikely(err)) {
+		if (err == -ENOENT) {
+			ntfs_error(vi->i_sb, "Open attribute is missing from "
+					"mft record.  Inode 0x%lx is corrupt.  "
+					"Run chkdsk.%s", vi->i_ino, te);
+			err = -EIO;
+		} else
+			ntfs_error(vi->i_sb, "Failed to lookup attribute in "
+					"inode 0x%lx (error code %d).%s",
+					vi->i_ino, err, te);
+		goto old_bad_out;
+	}
+	m = ctx->mrec;
+	a = ctx->attr;
+	/*
+	 * The i_size of the vfs inode is the new size for the attribute value.
+	 */
+	new_size = i_size_read(vi);
+	/* The current size of the attribute value is the old size. */
+	old_size = ntfs_attr_size(a);
+	/* Calculate the new allocated size. */
+	if (NInoNonResident(ni))
+		new_alloc_size = (new_size + vol->cluster_size - 1) &
+				~(s64)vol->cluster_size_mask;
+	else
+		new_alloc_size = (new_size + 7) & ~7;
+	/* The current allocated size is the old allocated size. */
+	read_lock_irqsave(&ni->size_lock, flags);
+	old_alloc_size = ni->allocated_size;
+	read_unlock_irqrestore(&ni->size_lock, flags);
+	/*
+	 * The change in the file size.  This will be 0 if no change, >0 if the
+	 * size is growing, and <0 if the size is shrinking.
+	 */
+	size_change = -1;
+	if (new_size - old_size >= 0) {
+		size_change = 1;
+		if (new_size == old_size)
+			size_change = 0;
+	}
+	/* As above for the allocated size. */
+	alloc_change = -1;
+	if (new_alloc_size - old_alloc_size >= 0) {
+		alloc_change = 1;
+		if (new_alloc_size == old_alloc_size)
+			alloc_change = 0;
+	}
+	/*
+	 * If neither the size nor the allocation are being changed there is
+	 * nothing to do.
+	 */
+	if (!size_change && !alloc_change)
+		goto unm_done;
+	/* If the size is changing, check if new size is allowed in $AttrDef. */
+	if (size_change) {
+		err = ntfs_attr_size_bounds_check(vol, ni->type, new_size);
+		if (unlikely(err)) {
+			if (err == -ERANGE) {
+				ntfs_error(vol->sb, "Truncate would cause the "
+						"inode 0x%lx to %simum size "
+						"for its attribute type "
+						"(0x%x).  Aborting truncate.",
+						vi->i_ino,
+						new_size > old_size ? "exceed "
+						"the max" : "go under the min",
+						le32_to_cpu(ni->type));
+				err = -EFBIG;
+			} else {
+				ntfs_error(vol->sb, "Inode 0x%lx has unknown "
+						"attribute type 0x%x.  "
+						"Aborting truncate.",
+						vi->i_ino,
+						le32_to_cpu(ni->type));
+				err = -EIO;
+			}
+			/* Reset the vfs inode size to the old size. */
+			i_size_write(vi, old_size);
+			goto err_out;
+		}
+	}
+	if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+		ntfs_warning(vi->i_sb, "Changes in inode size are not "
+				"supported yet for %s files, ignoring.",
+				NInoCompressed(ni) ? "compressed" :
+				"encrypted");
+		err = -EOPNOTSUPP;
+		goto bad_out;
+	}
+	if (a->non_resident)
+		goto do_non_resident_truncate;
+	BUG_ON(NInoNonResident(ni));
+	/* Resize the attribute record to best fit the new attribute size. */
+	if (new_size < vol->mft_record_size &&
+			!ntfs_resident_attr_value_resize(m, a, new_size)) {
+		/* The resize succeeded! */
+		flush_dcache_mft_record_page(ctx->ntfs_ino);
+		mark_mft_record_dirty(ctx->ntfs_ino);
+		write_lock_irqsave(&ni->size_lock, flags);
+		/* Update the sizes in the ntfs inode and all is done. */
+		ni->allocated_size = le32_to_cpu(a->length) -
+				le16_to_cpu(a->data.resident.value_offset);
+		/*
+		 * Note ntfs_resident_attr_value_resize() has already done any
+		 * necessary data clearing in the attribute record.  When the
+		 * file is being shrunk vmtruncate() will already have cleared
+		 * the top part of the last partial page, i.e. since this is
+		 * the resident case this is the page with index 0.  However,
+		 * when the file is being expanded, the page cache page data
+		 * between the old data_size, i.e. old_size, and the new_size
+		 * has not been zeroed.  Fortunately, we do not need to zero it
+		 * either since on one hand it will either already be zero due
+		 * to both read_folio and writepage clearing partial page data
+		 * beyond i_size in which case there is nothing to do or in the
+		 * case of the file being mmap()ped at the same time, POSIX
+		 * specifies that the behaviour is unspecified thus we do not
+		 * have to do anything.  This means that in our implementation
+		 * in the rare case that the file is mmap()ped and a write
+		 * occurred into the mmap()ped region just beyond the file size
+		 * and writepage has not yet been called to write out the page
+		 * (which would clear the area beyond the file size) and we now
+		 * extend the file size to incorporate this dirty region
+		 * outside the file size, a write of the page would result in
+		 * this data being written to disk instead of being cleared.
+		 * Given both POSIX and the Linux mmap(2) man page specify that
+		 * this corner case is undefined, we choose to leave it like
+		 * that as this is much simpler for us as we cannot lock the
+		 * relevant page now since we are holding too many ntfs locks
+		 * which would result in a lock reversal deadlock.
+		 */
+		ni->initialized_size = new_size;
+		write_unlock_irqrestore(&ni->size_lock, flags);
+		goto unm_done;
+	}
+	/* If the above resize failed, this must be an attribute extension. */
+	BUG_ON(size_change < 0);
+	/*
+	 * We have to drop all the locks so we can call
+	 * ntfs_attr_make_non_resident().  This could be optimised by try-
+	 * locking the first page cache page and only if that fails dropping
+	 * the locks, locking the page, and redoing all the locking and
+	 * lookups.  While this would be a huge optimisation, it is not worth
+	 * it as this is definitely a slow code path as it only ever can happen
+	 * once for any given file.
+	 */
+	ntfs_attr_put_search_ctx(ctx);
+	unmap_mft_record(base_ni);
+	up_write(&ni->runlist.lock);
+	/*
+	 * Not enough space in the mft record, try to make the attribute
+	 * non-resident and if successful restart the truncation process.
+	 */
+	err = ntfs_attr_make_non_resident(ni, old_size);
+	if (likely(!err))
+		goto retry_truncate;
+	/*
+	 * Could not make non-resident.  If this is due to this not being
+	 * permitted for this attribute type or there not being enough space,
+	 * try to make other attributes non-resident.  Otherwise fail.
+	 */
+	if (unlikely(err != -EPERM && err != -ENOSPC)) {
+		ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, attribute "
+				"type 0x%x, because the conversion from "
+				"resident to non-resident attribute failed "
+				"with error code %i.", vi->i_ino,
+				(unsigned)le32_to_cpu(ni->type), err);
+		if (err != -ENOMEM)
+			err = -EIO;
+		goto conv_err_out;
+	}
+	/* TODO: Not implemented from here, abort. */
+	if (err == -ENOSPC)
+		ntfs_error(vol->sb, "Not enough space in the mft record/on "
+				"disk for the non-resident attribute value.  "
+				"This case is not implemented yet.");
+	else /* if (err == -EPERM) */
+		ntfs_error(vol->sb, "This attribute type may not be "
+				"non-resident.  This case is not implemented "
+				"yet.");
+	err = -EOPNOTSUPP;
+	goto conv_err_out;
+#if 0
+	// TODO: Attempt to make other attributes non-resident.
+	if (!err)
+		goto do_resident_extend;
+	/*
+	 * Both the attribute list attribute and the standard information
+	 * attribute must remain in the base inode.  Thus, if this is one of
+	 * these attributes, we have to try to move other attributes out into
+	 * extent mft records instead.
+	 */
+	if (ni->type == AT_ATTRIBUTE_LIST ||
+			ni->type == AT_STANDARD_INFORMATION) {
+		// TODO: Attempt to move other attributes into extent mft
+		// records.
+		err = -EOPNOTSUPP;
+		if (!err)
+			goto do_resident_extend;
+		goto err_out;
+	}
+	// TODO: Attempt to move this attribute to an extent mft record, but
+	// only if it is not already the only attribute in an mft record in
+	// which case there would be nothing to gain.
+	err = -EOPNOTSUPP;
+	if (!err)
+		goto do_resident_extend;
+	/* There is nothing we can do to make enough space. )-: */
+	goto err_out;
+#endif
+do_non_resident_truncate:
+	BUG_ON(!NInoNonResident(ni));
+	if (alloc_change < 0) {
+		highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
+		if (highest_vcn > 0 &&
+				old_alloc_size >> vol->cluster_size_bits >
+				highest_vcn + 1) {
+			/*
+			 * This attribute has multiple extents.  Not yet
+			 * supported.
+			 */
+			ntfs_error(vol->sb, "Cannot truncate inode 0x%lx, "
+					"attribute type 0x%x, because the "
+					"attribute is highly fragmented (it "
+					"consists of multiple extents) and "
+					"this case is not implemented yet.",
+					vi->i_ino,
+					(unsigned)le32_to_cpu(ni->type));
+			err = -EOPNOTSUPP;
+			goto bad_out;
+		}
+	}
+	/*
+	 * If the size is shrinking, need to reduce the initialized_size and
+	 * the data_size before reducing the allocation.
+	 */
+	if (size_change < 0) {
+		/*
+		 * Make the valid size smaller (i_size is already up-to-date).
+		 */
+		write_lock_irqsave(&ni->size_lock, flags);
+		if (new_size < ni->initialized_size) {
+			ni->initialized_size = new_size;
+			a->data.non_resident.initialized_size =
+					cpu_to_sle64(new_size);
+		}
+		a->data.non_resident.data_size = cpu_to_sle64(new_size);
+		write_unlock_irqrestore(&ni->size_lock, flags);
+		flush_dcache_mft_record_page(ctx->ntfs_ino);
+		mark_mft_record_dirty(ctx->ntfs_ino);
+		/* If the allocated size is not changing, we are done. */
+		if (!alloc_change)
+			goto unm_done;
+		/*
+		 * If the size is shrinking it makes no sense for the
+		 * allocation to be growing.
+		 */
+		BUG_ON(alloc_change > 0);
+	} else /* if (size_change >= 0) */ {
+		/*
+		 * The file size is growing or staying the same but the
+		 * allocation can be shrinking, growing or staying the same.
+		 */
+		if (alloc_change > 0) {
+			/*
+			 * We need to extend the allocation and possibly update
+			 * the data size.  If we are updating the data size,
+			 * since we are not touching the initialized_size we do
+			 * not need to worry about the actual data on disk.
+			 * And as far as the page cache is concerned, there
+			 * will be no pages beyond the old data size and any
+			 * partial region in the last page between the old and
+			 * new data size (or the end of the page if the new
+			 * data size is outside the page) does not need to be
+			 * modified as explained above for the resident
+			 * attribute truncate case.  To do this, we simply drop
+			 * the locks we hold and leave all the work to our
+			 * friendly helper ntfs_attr_extend_allocation().
+			 */
+			ntfs_attr_put_search_ctx(ctx);
+			unmap_mft_record(base_ni);
+			up_write(&ni->runlist.lock);
+			err = ntfs_attr_extend_allocation(ni, new_size,
+					size_change > 0 ? new_size : -1, -1);
+			/*
+			 * ntfs_attr_extend_allocation() will have done error
+			 * output already.
+			 */
+			goto done;
+		}
+		if (!alloc_change)
+			goto alloc_done;
+	}
+	/* alloc_change < 0 */
+	/* Free the clusters. */
+	nr_freed = ntfs_cluster_free(ni, new_alloc_size >>
+			vol->cluster_size_bits, -1, ctx);
+	m = ctx->mrec;
+	a = ctx->attr;
+	if (unlikely(nr_freed < 0)) {
+		ntfs_error(vol->sb, "Failed to release cluster(s) (error code "
+				"%lli).  Unmount and run chkdsk to recover "
+				"the lost cluster(s).", (long long)nr_freed);
+		NVolSetErrors(vol);
+		nr_freed = 0;
+	}
+	/* Truncate the runlist. */
+	err = ntfs_rl_truncate_nolock(vol, &ni->runlist,
+			new_alloc_size >> vol->cluster_size_bits);
+	/*
+	 * If the runlist truncation failed and/or the search context is no
+	 * longer valid, we cannot resize the attribute record or build the
+	 * mapping pairs array thus we mark the inode bad so that no access to
+	 * the freed clusters can happen.
+	 */
+	if (unlikely(err || IS_ERR(m))) {
+		ntfs_error(vol->sb, "Failed to %s (error code %li).%s",
+				IS_ERR(m) ?
+				"restore attribute search context" :
+				"truncate attribute runlist",
+				IS_ERR(m) ? PTR_ERR(m) : err, es);
+		err = -EIO;
+		goto bad_out;
+	}
+	/* Get the size for the shrunk mapping pairs array for the runlist. */
+	mp_size = ntfs_get_size_for_mapping_pairs(vol, ni->runlist.rl, 0, -1);
+	if (unlikely(mp_size <= 0)) {
+		ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
+				"attribute type 0x%x, because determining the "
+				"size for the mapping pairs failed with error "
+				"code %i.%s", vi->i_ino,
+				(unsigned)le32_to_cpu(ni->type), mp_size, es);
+		err = -EIO;
+		goto bad_out;
+	}
+	/*
+	 * Shrink the attribute record for the new mapping pairs array.  Note,
+	 * this cannot fail since we are making the attribute smaller thus by
+	 * definition there is enough space to do so.
+	 */
+	err = ntfs_attr_record_resize(m, a, mp_size +
+			le16_to_cpu(a->data.non_resident.mapping_pairs_offset));
+	BUG_ON(err);
+	/*
+	 * Generate the mapping pairs array directly into the attribute record.
+	 */
+	err = ntfs_mapping_pairs_build(vol, (u8*)a +
+			le16_to_cpu(a->data.non_resident.mapping_pairs_offset),
+			mp_size, ni->runlist.rl, 0, -1, NULL);
+	if (unlikely(err)) {
+		ntfs_error(vol->sb, "Cannot shrink allocation of inode 0x%lx, "
+				"attribute type 0x%x, because building the "
+				"mapping pairs failed with error code %i.%s",
+				vi->i_ino, (unsigned)le32_to_cpu(ni->type),
+				err, es);
+		err = -EIO;
+		goto bad_out;
+	}
+	/* Update the allocated/compressed size as well as the highest vcn. */
+	a->data.non_resident.highest_vcn = cpu_to_sle64((new_alloc_size >>
+			vol->cluster_size_bits) - 1);
+	write_lock_irqsave(&ni->size_lock, flags);
+	ni->allocated_size = new_alloc_size;
+	a->data.non_resident.allocated_size = cpu_to_sle64(new_alloc_size);
+	if (NInoSparse(ni) || NInoCompressed(ni)) {
+		if (nr_freed) {
+			ni->itype.compressed.size -= nr_freed <<
+					vol->cluster_size_bits;
+			BUG_ON(ni->itype.compressed.size < 0);
+			a->data.non_resident.compressed_size = cpu_to_sle64(
+					ni->itype.compressed.size);
+			vi->i_blocks = ni->itype.compressed.size >> 9;
+		}
+	} else
+		vi->i_blocks = new_alloc_size >> 9;
+	write_unlock_irqrestore(&ni->size_lock, flags);
+	/*
+	 * We have shrunk the allocation.  If this is a shrinking truncate we
+	 * have already dealt with the initialized_size and the data_size above
+	 * and we are done.  If the truncate is only changing the allocation
+	 * and not the data_size, we are also done.  If this is an extending
+	 * truncate, need to extend the data_size now which is ensured by the
+	 * fact that @size_change is positive.
+	 */
+alloc_done:
+	/*
+	 * If the size is growing, need to update it now.  If it is shrinking,
+	 * we have already updated it above (before the allocation change).
+	 */
+	if (size_change > 0)
+		a->data.non_resident.data_size = cpu_to_sle64(new_size);
+	/* Ensure the modified mft record is written out. */
+	flush_dcache_mft_record_page(ctx->ntfs_ino);
+	mark_mft_record_dirty(ctx->ntfs_ino);
+unm_done:
+	ntfs_attr_put_search_ctx(ctx);
+	unmap_mft_record(base_ni);
+	up_write(&ni->runlist.lock);
+done:
+	/* Update the mtime and ctime on the base inode. */
+	/* normally ->truncate shouldn't update ctime or mtime,
+	 * but ntfs did before so it got a copy & paste version
+	 * of file_update_time.  one day someone should fix this
+	 * for real.
+	 */
+	if (!IS_NOCMTIME(VFS_I(base_ni)) && !IS_RDONLY(VFS_I(base_ni))) {
+		struct timespec64 now = current_time(VFS_I(base_ni));
+		struct timespec64 ctime = inode_get_ctime(VFS_I(base_ni));
+		int sync_it = 0;
+
+		if (!timespec64_equal(&VFS_I(base_ni)->i_mtime, &now) ||
+		    !timespec64_equal(&ctime, &now))
+			sync_it = 1;
+		inode_set_ctime_to_ts(VFS_I(base_ni), now);
+		VFS_I(base_ni)->i_mtime = now;
+
+		if (sync_it)
+			mark_inode_dirty_sync(VFS_I(base_ni));
+	}
+
+	if (likely(!err)) {
+		NInoClearTruncateFailed(ni);
+		ntfs_debug("Done.");
+	}
+	return err;
+old_bad_out:
+	old_size = -1;
+bad_out:
+	if (err != -ENOMEM && err != -EOPNOTSUPP)
+		NVolSetErrors(vol);
+	if (err != -EOPNOTSUPP)
+		NInoSetTruncateFailed(ni);
+	else if (old_size >= 0)
+		i_size_write(vi, old_size);
+err_out:
+	if (ctx)
+		ntfs_attr_put_search_ctx(ctx);
+	if (m)
+		unmap_mft_record(base_ni);
+	up_write(&ni->runlist.lock);
+out:
+	ntfs_debug("Failed.  Returning error code %i.", err);
+	return err;
+conv_err_out:
+	if (err != -ENOMEM && err != -EOPNOTSUPP)
+		NVolSetErrors(vol);
+	if (err != -EOPNOTSUPP)
+		NInoSetTruncateFailed(ni);
+	else
+		i_size_write(vi, old_size);
+	goto out;
+}
+
+/**
+ * ntfs_truncate_vfs - wrapper for ntfs_truncate() that has no return value
+ * @vi:		inode for which the i_size was changed
+ *
+ * Wrapper for ntfs_truncate() that has no return value.
+ *
+ * See ntfs_truncate() description above for details.
+ */
+#ifdef NTFS_RW
+void ntfs_truncate_vfs(struct inode *vi) {
+	ntfs_truncate(vi);
+}
+#endif
+
+/**
+ * ntfs_setattr - called from notify_change() when an attribute is being changed
+ * @idmap:	idmap of the mount the inode was found from
+ * @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.
+ *
+ * We also abort all changes of user, group, and mode as we do not implement
+ * the NTFS ACLs yet.
+ *
+ * Called with ->i_mutex held.
+ */
+int ntfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+		 struct iattr *attr)
+{
+	struct inode *vi = d_inode(dentry);
+	int err;
+	unsigned int ia_valid = attr->ia_valid;
+
+	err = setattr_prepare(&nop_mnt_idmap, dentry, attr);
+	if (err)
+		goto out;
+	/* We do not support NTFS ACLs yet. */
+	if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
+		ntfs_warning(vi->i_sb, "Changes in user/group/mode are not "
+				"supported yet, ignoring.");
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+	if (ia_valid & ATTR_SIZE) {
+		if (attr->ia_size != i_size_read(vi)) {
+			ntfs_inode *ni = NTFS_I(vi);
+			/*
+			 * FIXME: For now we do not support resizing of
+			 * compressed or encrypted files yet.
+			 */
+			if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+				ntfs_warning(vi->i_sb, "Changes in inode size "
+						"are not supported yet for "
+						"%s files, ignoring.",
+						NInoCompressed(ni) ?
+						"compressed" : "encrypted");
+				err = -EOPNOTSUPP;
+			} else {
+				truncate_setsize(vi, attr->ia_size);
+				ntfs_truncate_vfs(vi);
+			}
+			if (err || ia_valid == ATTR_SIZE)
+				goto out;
+		} else {
+			/*
+			 * We skipped the truncate but must still update
+			 * timestamps.
+			 */
+			ia_valid |= ATTR_MTIME | ATTR_CTIME;
+		}
+	}
+	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)
+		inode_set_ctime_to_ts(vi, attr->ia_ctime);
+	mark_inode_dirty(vi);
+out:
+	return err;
+}
+
+/**
+ * __ntfs_write_inode - write out a dirty inode
+ * @vi:		inode to write out
+ * @sync:	if true, write out synchronously
+ *
+ * Write out a dirty inode to disk including any extent inodes if present.
+ *
+ * If @sync is true, commit the inode to disk and wait for io completion.  This
+ * is done using write_mft_record().
+ *
+ * If @sync is false, just schedule the write to happen but do not wait for i/o
+ * completion.  In 2.6 kernels, scheduling usually happens just by virtue of
+ * marking the page (and in this case mft record) dirty but we do not implement
+ * this yet as write_mft_record() largely ignores the @sync parameter and
+ * always performs synchronous writes.
+ *
+ * Return 0 on success and -errno on error.
+ */
+int __ntfs_write_inode(struct inode *vi, int sync)
+{
+	sle64 nt;
+	ntfs_inode *ni = NTFS_I(vi);
+	ntfs_attr_search_ctx *ctx;
+	MFT_RECORD *m;
+	STANDARD_INFORMATION *si;
+	int err = 0;
+	bool modified = false;
+
+	ntfs_debug("Entering for %sinode 0x%lx.", NInoAttr(ni) ? "attr " : "",
+			vi->i_ino);
+	/*
+	 * Dirty attribute inodes are written via their real inodes so just
+	 * clean them here.  Access time updates are taken care off when the
+	 * real inode is written.
+	 */
+	if (NInoAttr(ni)) {
+		NInoClearDirty(ni);
+		ntfs_debug("Done.");
+		return 0;
+	}
+	/* Map, pin, and lock the mft record belonging to the inode. */
+	m = map_mft_record(ni);
+	if (IS_ERR(m)) {
+		err = PTR_ERR(m);
+		goto err_out;
+	}
+	/* Update the access times in the standard information attribute. */
+	ctx = ntfs_attr_get_search_ctx(ni, m);
+	if (unlikely(!ctx)) {
+		err = -ENOMEM;
+		goto unm_err_out;
+	}
+	err = ntfs_attr_lookup(AT_STANDARD_INFORMATION, NULL, 0,
+			CASE_SENSITIVE, 0, NULL, 0, ctx);
+	if (unlikely(err)) {
+		ntfs_attr_put_search_ctx(ctx);
+		goto unm_err_out;
+	}
+	si = (STANDARD_INFORMATION*)((u8*)ctx->attr +
+			le16_to_cpu(ctx->attr->data.resident.value_offset));
+	/* Update the access times if they have changed. */
+	nt = utc2ntfs(vi->i_mtime);
+	if (si->last_data_change_time != nt) {
+		ntfs_debug("Updating mtime for inode 0x%lx: old = 0x%llx, "
+				"new = 0x%llx", vi->i_ino, (long long)
+				sle64_to_cpu(si->last_data_change_time),
+				(long long)sle64_to_cpu(nt));
+		si->last_data_change_time = nt;
+		modified = true;
+	}
+	nt = utc2ntfs(inode_get_ctime(vi));
+	if (si->last_mft_change_time != nt) {
+		ntfs_debug("Updating ctime for inode 0x%lx: old = 0x%llx, "
+				"new = 0x%llx", vi->i_ino, (long long)
+				sle64_to_cpu(si->last_mft_change_time),
+				(long long)sle64_to_cpu(nt));
+		si->last_mft_change_time = nt;
+		modified = true;
+	}
+	nt = utc2ntfs(vi->i_atime);
+	if (si->last_access_time != nt) {
+		ntfs_debug("Updating atime for inode 0x%lx: old = 0x%llx, "
+				"new = 0x%llx", vi->i_ino,
+				(long long)sle64_to_cpu(si->last_access_time),
+				(long long)sle64_to_cpu(nt));
+		si->last_access_time = nt;
+		modified = true;
+	}
+	/*
+	 * If we just modified the standard information attribute we need to
+	 * mark the mft record it is in dirty.  We do this manually so that
+	 * mark_inode_dirty() is not called which would redirty the inode and
+	 * hence result in an infinite loop of trying to write the inode.
+	 * There is no need to mark the base inode nor the base mft record
+	 * dirty, since we are going to write this mft record below in any case
+	 * and the base mft record may actually not have been modified so it
+	 * might not need to be written out.
+	 * NOTE: It is not a problem when the inode for $MFT itself is being
+	 * written out as mark_ntfs_record_dirty() will only set I_DIRTY_PAGES
+	 * on the $MFT inode and hence __ntfs_write_inode() will not be
+	 * re-invoked because of it which in turn is ok since the dirtied mft
+	 * record will be cleaned and written out to disk below, i.e. before
+	 * this function returns.
+	 */
+	if (modified) {
+		flush_dcache_mft_record_page(ctx->ntfs_ino);
+		if (!NInoTestSetDirty(ctx->ntfs_ino))
+			mark_ntfs_record_dirty(ctx->ntfs_ino->page,
+					ctx->ntfs_ino->page_ofs);
+	}
+	ntfs_attr_put_search_ctx(ctx);
+	/* Now the access times are updated, write the base mft record. */
+	if (NInoDirty(ni))
+		err = write_mft_record(ni, m, sync);
+	/* Write all attached extent mft records. */
+	mutex_lock(&ni->extent_lock);
+	if (ni->nr_extents > 0) {
+		ntfs_inode **extent_nis = ni->ext.extent_ntfs_inos;
+		int i;
+
+		ntfs_debug("Writing %i extent inodes.", ni->nr_extents);
+		for (i = 0; i < ni->nr_extents; i++) {
+			ntfs_inode *tni = extent_nis[i];
+
+			if (NInoDirty(tni)) {
+				MFT_RECORD *tm = map_mft_record(tni);
+				int ret;
+
+				if (IS_ERR(tm)) {
+					if (!err || err == -ENOMEM)
+						err = PTR_ERR(tm);
+					continue;
+				}
+				ret = write_mft_record(tni, tm, sync);
+				unmap_mft_record(tni);
+				if (unlikely(ret)) {
+					if (!err || err == -ENOMEM)
+						err = ret;
+				}
+			}
+		}
+	}
+	mutex_unlock(&ni->extent_lock);
+	unmap_mft_record(ni);
+	if (unlikely(err))
+		goto err_out;
+	ntfs_debug("Done.");
+	return 0;
+unm_err_out:
+	unmap_mft_record(ni);
+err_out:
+	if (err == -ENOMEM) {
+		ntfs_warning(vi->i_sb, "Not enough memory to write inode.  "
+				"Marking the inode dirty again, so the VFS "
+				"retries later.");
+		mark_inode_dirty(vi);
+	} else {
+		ntfs_error(vi->i_sb, "Failed (error %i):  Run chkdsk.", -err);
+		NVolSetErrors(ni->vol);
+	}
+	return err;
+}
+
+#endif /* NTFS_RW */