Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 1245 insertions, 0 deletions

diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
new file mode 100644
index 000000000..88747217b
--- /dev/null
+++ b/fs/ntfs/file.c
@@ -0,0 +1,1245 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * NTFS kernel file operations.
+ *
+ * Copyright (c) 2001-2015 Anton Altaparmakov and Tuxera Inc.
+ * Copyright (c) 2025 LG Electronics Co., Ltd.
+ */
+
+#include <linux/writeback.h>
+#include <linux/blkdev.h>
+#include <linux/fs.h>
+#include <linux/iomap.h>
+#include <linux/uio.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/compat.h>
+#include <linux/falloc.h>
+
+#include "lcnalloc.h"
+#include "ntfs.h"
+#include "reparse.h"
+#include "ea.h"
+#include "iomap.h"
+#include "bitmap.h"
+#include "volume.h"
+
+#include <linux/filelock.h>
+
+/*
+ * ntfs_file_open - called when an inode is about to be opened
+ * @vi:		inode to be opened
+ * @filp:	file structure describing the inode
+ *
+ * Limit file size to the page cache limit on architectures where unsigned long
+ * is 32-bits. This is the most we can do for now without overflowing the page
+ * cache page index. Doing it this way means we don't run into problems because
+ * of existing too large files. It would be better to allow the user to read
+ * the beginning of the file but I doubt very much anyone is going to hit this
+ * check on a 32-bit architecture, so there is no point in adding the extra
+ * complexity required to support this.
+ *
+ * On 64-bit architectures, the check is hopefully optimized away by the
+ * compiler.
+ *
+ * After the check passes, just call generic_file_open() to do its work.
+ */
+static int ntfs_file_open(struct inode *vi, struct file *filp)
+{
+	struct ntfs_inode *ni = NTFS_I(vi);
+
+	if (NVolShutdown(ni->vol))
+		return -EIO;
+
+	if (sizeof(unsigned long) < 8) {
+		if (i_size_read(vi) > MAX_LFS_FILESIZE)
+			return -EOVERFLOW;
+	}
+
+	filp->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT;
+
+	return generic_file_open(vi, filp);
+}
+
+/*
+ * Trim preallocated space on file release.
+ *
+ * When the preallo_size mount option is set (default 64KB), writes extend
+ * allocated_size and runlist in units of preallocated size to reduce
+ * runlist merge overhead for small writes. This can leave
+ * allocated_size > data_size if not all preallocated space is used.
+ *
+ * We perform the trim here because ->release() is called only when
+ * the file is no longer open. At this point, no further writes can occur,
+ * so it is safe to reclaim the unused preallocated space.
+ *
+ * Returns 0 on success, or negative error on failure.
+ */
+static int ntfs_trim_prealloc(struct inode *vi)
+{
+	struct ntfs_inode *ni = NTFS_I(vi);
+	struct ntfs_volume *vol = ni->vol;
+	struct runlist_element *rl;
+	s64 aligned_data_size;
+	s64 vcn_ds, vcn_tr;
+	ssize_t rc;
+	int err = 0;
+
+	inode_lock(vi);
+	mutex_lock(&ni->mrec_lock);
+	down_write(&ni->runlist.lock);
+
+	aligned_data_size = round_up(ni->data_size, vol->cluster_size);
+	if (aligned_data_size >= ni->allocated_size)
+		goto out_unlock;
+
+	vcn_ds = ntfs_bytes_to_cluster(vol, aligned_data_size);
+	vcn_tr = -1;
+	rc = ni->runlist.count - 2;
+	rl = ni->runlist.rl;
+
+	while (rc >= 0 && rl[rc].lcn == LCN_HOLE && vcn_ds <= rl[rc].vcn) {
+		vcn_tr = rl[rc].vcn;
+		rc--;
+	}
+
+	if (vcn_tr >= 0) {
+		err = ntfs_rl_truncate_nolock(vol, &ni->runlist, vcn_tr);
+		if (err) {
+			kvfree(ni->runlist.rl);
+			ni->runlist.rl = NULL;
+			ntfs_error(vol->sb, "Preallocated block rollback failed");
+		} else {
+			ni->allocated_size = ntfs_cluster_to_bytes(vol, vcn_tr);
+			err = ntfs_attr_update_mapping_pairs(ni, 0);
+			if (err)
+				ntfs_error(vol->sb,
+					   "Failed to rollback mapping pairs for prealloc");
+		}
+	}
+
+out_unlock:
+	up_write(&ni->runlist.lock);
+	mutex_unlock(&ni->mrec_lock);
+	inode_unlock(vi);
+
+	return err;
+}
+
+static int ntfs_file_release(struct inode *vi, struct file *filp)
+{
+	if (!NInoCompressed(NTFS_I(vi)) &&
+	    !NInoWofCompressed(NTFS_I(vi)))
+		return ntfs_trim_prealloc(vi);
+
+	return 0;
+}
+
+/*
+ * ntfs_file_fsync - sync a file to disk
+ * @filp:	file to be synced
+ * @start:	start offset to be synced
+ * @end:	end offset to be synced
+ * @datasync:	if non-zero only flush user data and not metadata
+ *
+ * Data integrity sync of a file to disk.  Used for fsync, fdatasync, and msync
+ * system calls.  This function is inspired by fs/buffer.c::file_fsync().
+ *
+ * If @datasync is false, write the mft record and all associated extent mft
+ * records as well as the $DATA attribute and then sync the block device.
+ *
+ * If @datasync is true and the attribute is non-resident, we skip the writing
+ * of the mft record and all associated extent mft records (this might still
+ * happen due to the write_inode_now() call).
+ *
+ * Also, if @datasync is true, we do not wait on the inode to be written out
+ * but we always wait on the page cache pages to be written out.
+ */
+static int ntfs_file_fsync(struct file *filp, loff_t start, loff_t end,
+			   int datasync)
+{
+	struct inode *vi = filp->f_mapping->host;
+	struct ntfs_inode *ni = NTFS_I(vi);
+	struct ntfs_volume *vol = ni->vol;
+	int err, ret = 0;
+	struct inode *parent_vi, *ia_vi;
+	struct ntfs_attr_search_ctx *ctx;
+
+	ntfs_debug("Entering for inode 0x%llx.", ni->mft_no);
+
+	if (NVolShutdown(vol))
+		return -EIO;
+
+	err = file_write_and_wait_range(filp, start, end);
+	if (err)
+		return err;
+
+	if (!datasync || !NInoNonResident(NTFS_I(vi)))
+		ret = __ntfs_write_inode(vi, 1);
+	write_inode_now(vi, !datasync);
+
+	ctx = ntfs_attr_get_search_ctx(ni, NULL);
+	if (!ctx)
+		return -ENOMEM;
+
+	mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL_CHILD);
+	while (!(err = ntfs_attr_lookup(AT_UNUSED, NULL, 0, 0, 0, NULL, 0, ctx))) {
+		if (ctx->attr->type == AT_FILE_NAME) {
+			struct file_name_attr *fn = (struct file_name_attr *)((u8 *)ctx->attr +
+					le16_to_cpu(ctx->attr->data.resident.value_offset));
+
+			parent_vi = ntfs_iget(vi->i_sb, MREF_LE(fn->parent_directory));
+			if (IS_ERR(parent_vi))
+				continue;
+			mutex_lock_nested(&NTFS_I(parent_vi)->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+			ia_vi = ntfs_index_iget(parent_vi, I30, 4);
+			mutex_unlock(&NTFS_I(parent_vi)->mrec_lock);
+			if (IS_ERR(ia_vi)) {
+				iput(parent_vi);
+				continue;
+			}
+			write_inode_now(ia_vi, 1);
+			iput(ia_vi);
+			write_inode_now(parent_vi, 1);
+			iput(parent_vi);
+		} else if (ctx->attr->non_resident) {
+			struct inode *attr_vi;
+			__le16 *name;
+
+			name = (__le16 *)((u8 *)ctx->attr + le16_to_cpu(ctx->attr->name_offset));
+			if (ctx->attr->type == AT_DATA && ctx->attr->name_length == 0)
+				continue;
+
+			attr_vi = ntfs_attr_iget(vi, ctx->attr->type,
+						 name, ctx->attr->name_length);
+			if (IS_ERR(attr_vi))
+				continue;
+			spin_lock(&attr_vi->i_lock);
+			if (inode_state_read_once(attr_vi) & I_DIRTY_PAGES) {
+				spin_unlock(&attr_vi->i_lock);
+				filemap_write_and_wait(attr_vi->i_mapping);
+			} else
+				spin_unlock(&attr_vi->i_lock);
+			iput(attr_vi);
+		}
+	}
+	mutex_unlock(&ni->mrec_lock);
+	ntfs_attr_put_search_ctx(ctx);
+
+	write_inode_now(vol->mftbmp_ino, 1);
+	down_write(&vol->lcnbmp_lock);
+	write_inode_now(vol->lcnbmp_ino, 1);
+	up_write(&vol->lcnbmp_lock);
+	write_inode_now(vol->mft_ino, 1);
+
+	/*
+	 * NOTE: If we were to use mapping->private_list (see ext2 and
+	 * fs/buffer.c) for dirty blocks then we could optimize the below to be
+	 * sync_mapping_buffers(vi->i_mapping).
+	 */
+	err = sync_blockdev(vi->i_sb->s_bdev);
+	if (unlikely(err && !ret))
+		ret = err;
+	if (likely(!ret))
+		ntfs_debug("Done.");
+	else
+		ntfs_warning(vi->i_sb,
+				"Failed to f%ssync inode 0x%llx.  Error %u.",
+				datasync ? "data" : "", ni->mft_no, -ret);
+	if (!ret)
+		blkdev_issue_flush(vi->i_sb->s_bdev);
+	return ret;
+}
+
+static int ntfs_setattr_size(struct inode *vi, struct iattr *attr)
+{
+	struct ntfs_inode *ni = NTFS_I(vi);
+	int err;
+	loff_t old_size = vi->i_size;
+
+	if (NInoCompressed(ni) || NInoEncrypted(ni) || NInoWofCompressed(ni)) {
+		ntfs_warning(
+			vi->i_sb,
+			"Changes in inode size are not supported yet for %s files.",
+			NInoEncrypted(ni) ? "encrypted" : "compressed");
+		return -EOPNOTSUPP;
+	}
+
+	err = inode_newsize_ok(vi, attr->ia_size);
+	if (err)
+		return err;
+
+	inode_dio_wait(vi);
+	if (attr->ia_size > old_size) {
+		truncate_pagecache(vi, old_size);
+		i_size_write(vi, attr->ia_size);
+		pagecache_isize_extended(vi, old_size, attr->ia_size);
+	} else
+		truncate_setsize(vi, attr->ia_size);
+
+	err = ntfs_truncate_vfs(vi, attr->ia_size, old_size);
+	if (err) {
+		i_size_write(vi, old_size);
+		return err;
+	}
+
+	return err;
+}
+
+/*
+ * ntfs_setattr
+ *
+ * Called from notify_change() when an attribute is being changed.
+ *
+ * NOTE: Changes in inode size are not supported yet for compressed or
+ * encrypted files.
+ */
+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;
+	struct ntfs_inode *ni = NTFS_I(vi);
+	struct ntfs_volume *vol = ni->vol;
+
+	if (NVolShutdown(vol))
+		return -EIO;
+
+	err = setattr_prepare(idmap, dentry, attr);
+	if (err)
+		goto out;
+
+	if ((ia_valid & ATTR_SIZE) &&
+	    (NInoCompressed(ni) || NInoEncrypted(ni) ||
+	     NInoWofCompressed(ni))) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if (!(vol->vol_flags & VOLUME_IS_DIRTY))
+		ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY);
+
+	if (ia_valid & ATTR_SIZE) {
+		err = ntfs_setattr_size(vi, attr);
+		if (err)
+			goto out;
+
+		ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	}
+
+	setattr_copy(idmap, vi, attr);
+
+	if (vol->sb->s_flags & SB_POSIXACL && !S_ISLNK(vi->i_mode)) {
+		err = posix_acl_chmod(idmap, dentry, vi->i_mode);
+		if (err)
+			goto out;
+	}
+
+	if (0222 & vi->i_mode)
+		ni->flags &= ~FILE_ATTR_READONLY;
+	else
+		ni->flags |= FILE_ATTR_READONLY;
+
+	if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
+		unsigned int flags = 0;
+
+		if (ia_valid & ATTR_UID)
+			flags |= NTFS_EA_UID;
+		if (ia_valid & ATTR_GID)
+			flags |= NTFS_EA_GID;
+		if (ia_valid & ATTR_MODE)
+			flags |= NTFS_EA_MODE;
+
+		mutex_lock(&ni->mrec_lock);
+		err = ntfs_ea_set_wsl_inode(vi, 0, NULL, flags);
+		mutex_unlock(&ni->mrec_lock);
+		if (err)
+			goto out;
+
+	}
+
+	mark_inode_dirty(vi);
+out:
+	return err;
+}
+
+int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
+		struct kstat *stat, unsigned int request_mask,
+		unsigned int query_flags)
+{
+	struct inode *inode = d_backing_inode(path->dentry);
+	struct ntfs_inode *ni = NTFS_I(inode);
+
+	generic_fillattr(idmap, request_mask, inode, stat);
+
+	stat->blksize = NTFS_SB(inode->i_sb)->cluster_size;
+	stat->blocks = (((u64)NTFS_I(inode)->i_dealloc_clusters <<
+			NTFS_SB(inode->i_sb)->cluster_size_bits) >> 9) + inode->i_blocks;
+	stat->result_mask |= STATX_BTIME;
+	stat->btime = NTFS_I(inode)->i_crtime;
+
+	if (NInoCompressed(ni) || NInoWofCompressed(ni))
+		stat->attributes |= STATX_ATTR_COMPRESSED;
+
+	if (NInoEncrypted(ni))
+		stat->attributes |= STATX_ATTR_ENCRYPTED;
+
+	if (inode->i_flags & S_IMMUTABLE)
+		stat->attributes |= STATX_ATTR_IMMUTABLE;
+
+	if (inode->i_flags & S_APPEND)
+		stat->attributes |= STATX_ATTR_APPEND;
+
+	stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED |
+				 STATX_ATTR_IMMUTABLE | STATX_ATTR_APPEND;
+
+	/*
+	 * If it's a compressed or encrypted file, NTFS currently
+	 * does not support DIO. For normal files, we report the bdev
+	 * logical block size.
+	 */
+	if (request_mask & STATX_DIOALIGN && S_ISREG(inode->i_mode)) {
+		unsigned int align =
+			bdev_logical_block_size(inode->i_sb->s_bdev);
+
+		stat->result_mask |= STATX_DIOALIGN;
+		if (!NInoCompressed(ni) && !NInoEncrypted(ni) &&
+		    !NInoWofCompressed(ni)) {
+			stat->dio_mem_align = align;
+			stat->dio_offset_align = align;
+		}
+	}
+
+	return 0;
+}
+
+static loff_t ntfs_file_llseek(struct file *file, loff_t offset, int whence)
+{
+	struct inode *inode = file->f_mapping->host;
+
+	if (NInoWofCompressed(NTFS_I(inode)) &&
+	    (whence == SEEK_HOLE || whence == SEEK_DATA))
+		return -EOPNOTSUPP;
+
+	switch (whence) {
+	case SEEK_HOLE:
+		inode_lock_shared(inode);
+		offset = iomap_seek_hole(inode, offset, &ntfs_seek_iomap_ops);
+		inode_unlock_shared(inode);
+		break;
+	case SEEK_DATA:
+		inode_lock_shared(inode);
+		offset = iomap_seek_data(inode, offset, &ntfs_seek_iomap_ops);
+		inode_unlock_shared(inode);
+		break;
+	default:
+		return generic_file_llseek_size(file, offset, whence,
+						inode->i_sb->s_maxbytes,
+						i_size_read(inode));
+	}
+	if (offset < 0)
+		return offset;
+	return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+}
+
+static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
+{
+	struct inode *vi = file_inode(iocb->ki_filp);
+	struct super_block *sb = vi->i_sb;
+	ssize_t ret;
+
+	if (NVolShutdown(NTFS_SB(sb)))
+		return -EIO;
+
+	if ((NInoCompressed(NTFS_I(vi)) || NInoWofCompressed(NTFS_I(vi))) &&
+	    iocb->ki_flags & IOCB_DIRECT)
+		return -EOPNOTSUPP;
+
+	inode_lock_shared(vi);
+
+	if (iocb->ki_flags & IOCB_DIRECT) {
+		size_t count = iov_iter_count(to);
+
+		if ((iocb->ki_pos | count) & (sb->s_blocksize - 1)) {
+			ret = -EINVAL;
+			goto inode_unlock;
+		}
+
+		file_accessed(iocb->ki_filp);
+		ret = iomap_dio_rw(iocb, to, &ntfs_read_iomap_ops, NULL, 0,
+				NULL, 0);
+	} else {
+		ret = generic_file_read_iter(iocb, to);
+	}
+
+inode_unlock:
+	inode_unlock_shared(vi);
+
+	return ret;
+}
+
+static int ntfs_file_write_dio_end_io(struct kiocb *iocb, ssize_t size,
+		int error, unsigned int flags)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+
+	if (error)
+		return error;
+
+	if (size) {
+		if (i_size_read(inode) < iocb->ki_pos + size) {
+			i_size_write(inode, iocb->ki_pos + size);
+			mark_inode_dirty(inode);
+		}
+	}
+
+	return 0;
+}
+
+static const struct iomap_dio_ops ntfs_write_dio_ops = {
+	.end_io			= ntfs_file_write_dio_end_io,
+};
+
+static ssize_t ntfs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	ssize_t ret;
+
+	ret = iomap_dio_rw(iocb, from, &ntfs_dio_iomap_ops,
+			&ntfs_write_dio_ops, 0, NULL, 0);
+	if (ret == -ENOTBLK)
+		ret = 0;
+	else if (ret < 0)
+		goto out;
+
+	if (iov_iter_count(from)) {
+		loff_t offset, end;
+		ssize_t written;
+		int ret2;
+
+		offset = iocb->ki_pos;
+		iocb->ki_flags &= ~IOCB_DIRECT;
+		written = iomap_file_buffered_write(iocb, from,
+				&ntfs_write_iomap_ops, &ntfs_iomap_folio_ops,
+				NULL);
+		if (written < 0) {
+			ret = written;
+			goto out;
+		}
+
+		ret += written;
+		end = iocb->ki_pos + written - 1;
+		ret2 = filemap_write_and_wait_range(iocb->ki_filp->f_mapping,
+				offset, end);
+		if (ret2) {
+			ret = -EIO;
+			goto out;
+		}
+		invalidate_mapping_pages(iocb->ki_filp->f_mapping,
+					 offset >> PAGE_SHIFT,
+					 end >> PAGE_SHIFT);
+	}
+
+out:
+	return ret;
+}
+
+static int ntfs_expand_for_write(struct ntfs_inode *ni, loff_t end)
+{
+	struct ntfs_volume *vol = ni->vol;
+	loff_t prealloc_size = 0;
+	int err;
+
+	if (end <= ni->data_size)
+		return 0;
+
+	if (NInoCompressed(ni)) {
+		if (end > ni->allocated_size)
+			prealloc_size = round_up(end,
+						 ni->itype.compressed.block_size);
+	} else if (end > ni->allocated_size &&
+		   end < ni->allocated_size + vol->preallocated_size) {
+		prealloc_size = ni->allocated_size + vol->preallocated_size;
+	}
+
+	mutex_lock(&ni->mrec_lock);
+	err = ntfs_attr_expand(ni, end, prealloc_size);
+	mutex_unlock(&ni->mrec_lock);
+
+	return err;
+}
+
+static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct file *file = iocb->ki_filp;
+	struct inode *vi = file->f_mapping->host;
+	struct ntfs_inode *ni = NTFS_I(vi);
+	struct ntfs_volume *vol = ni->vol;
+	ssize_t ret;
+	ssize_t count;
+	loff_t pos, end;
+	int err;
+	loff_t old_data_size, old_init_size;
+
+	if (NVolShutdown(vol))
+		return -EIO;
+
+	if (NInoWofCompressed(ni))
+		return -EOPNOTSUPP;
+
+	if (NInoEncrypted(ni)) {
+		ntfs_error(vi->i_sb, "Writing for %s files is not supported yet",
+			   NInoCompressed(ni) ? "Compressed" : "Encrypted");
+		return -EOPNOTSUPP;
+	}
+
+	if (NInoCompressed(ni) && iocb->ki_flags & IOCB_DIRECT)
+		return -EOPNOTSUPP;
+
+	if (iocb->ki_flags & IOCB_NOWAIT) {
+		if (!inode_trylock(vi))
+			return -EAGAIN;
+	} else
+		inode_lock(vi);
+
+	ret = generic_write_checks(iocb, from);
+	if (ret <= 0)
+		goto out_lock;
+
+	err = file_modified(iocb->ki_filp);
+	if (err) {
+		ret = err;
+		goto out_lock;
+	}
+
+	if (!(vol->vol_flags & VOLUME_IS_DIRTY))
+		ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY);
+
+	pos = iocb->ki_pos;
+	count = ret;
+	end = pos + count;
+
+	old_data_size = ni->data_size;
+	old_init_size = ni->initialized_size;
+
+	if (end > old_data_size) {
+		ret = ntfs_expand_for_write(ni, end);
+		if (ret < 0)
+			goto out;
+	}
+
+	if (NInoNonResident(ni) && !NInoCompressed(ni) &&
+	    end > old_init_size) {
+		ret = ntfs_extend_initialized_size(vi, pos, end);
+		if (ret < 0)
+			goto out;
+	}
+
+	if (NInoNonResident(ni) && NInoCompressed(ni)) {
+		ret = ntfs_compress_write(ni, pos, count, from);
+		if (ret > 0)
+			iocb->ki_pos += ret;
+		goto out;
+	}
+
+	if (NInoNonResident(ni) && iocb->ki_flags & IOCB_DIRECT)
+		ret = ntfs_dio_write_iter(iocb, from);
+	else
+		ret = iomap_file_buffered_write(iocb, from, &ntfs_write_iomap_ops,
+				&ntfs_iomap_folio_ops, NULL);
+out:
+	if (ret < 0 && ret != -EIOCBQUEUED) {
+		if (ni->initialized_size != old_init_size) {
+			mutex_lock(&ni->mrec_lock);
+			ntfs_attr_set_initialized_size(ni, old_init_size);
+			mutex_unlock(&ni->mrec_lock);
+		}
+		if (ni->data_size != old_data_size) {
+			truncate_setsize(vi, old_data_size);
+			ntfs_attr_truncate(ni, old_data_size);
+		}
+	}
+out_lock:
+	inode_unlock(vi);
+	if (ret > 0)
+		ret = generic_write_sync(iocb, ret);
+	return ret;
+}
+
+static vm_fault_t ntfs_filemap_page_mkwrite(struct vm_fault *vmf)
+{
+	struct inode *inode = file_inode(vmf->vma->vm_file);
+	vm_fault_t ret;
+
+	if (NInoWofCompressed(NTFS_I(inode)))
+		return VM_FAULT_SIGBUS;
+
+	sb_start_pagefault(inode->i_sb);
+	file_update_time(vmf->vma->vm_file);
+
+	ret = iomap_page_mkwrite(vmf, &ntfs_page_mkwrite_iomap_ops, NULL);
+	sb_end_pagefault(inode->i_sb);
+	return ret;
+}
+
+static const struct vm_operations_struct ntfs_file_vm_ops = {
+	.fault		= filemap_fault,
+	.map_pages	= filemap_map_pages,
+	.page_mkwrite	= ntfs_filemap_page_mkwrite,
+};
+
+static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
+{
+	struct file *file = desc->file;
+	struct inode *inode = file_inode(file);
+
+	if (NVolShutdown(NTFS_SB(file->f_mapping->host->i_sb)))
+		return -EIO;
+
+	if (NInoCompressed(NTFS_I(inode)) || NInoWofCompressed(NTFS_I(inode)))
+		return -EOPNOTSUPP;
+
+	if (vma_desc_test_all(desc, VMA_SHARED_BIT, VMA_MAYWRITE_BIT)) {
+		struct inode *inode = file_inode(file);
+		loff_t from, to;
+		int err;
+
+		from = ((loff_t)desc->pgoff << PAGE_SHIFT);
+		to = min_t(loff_t, i_size_read(inode),
+			   from + desc->end - desc->start);
+
+		if (NTFS_I(inode)->initialized_size < to) {
+			err = ntfs_extend_initialized_size(inode, to, to);
+			if (err)
+				return err;
+		}
+	}
+
+
+	file_accessed(file);
+	desc->vm_ops = &ntfs_file_vm_ops;
+	return 0;
+}
+
+static int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+		u64 start, u64 len)
+{
+	if (NInoWofCompressed(NTFS_I(inode)))
+		return -EOPNOTSUPP;
+
+	return iomap_fiemap(inode, fieinfo, start, len, &ntfs_read_iomap_ops);
+}
+
+static const char *ntfs_get_link(struct dentry *dentry, struct inode *inode,
+		struct delayed_call *done)
+{
+	struct ntfs_inode *ni = NTFS_I(inode);
+	char *target;
+	int err;
+
+	if (!dentry)
+		return ERR_PTR(-ECHILD);
+
+	if (!ni->target)
+		return ERR_PTR(-EINVAL);
+
+	if (ni->reparse_tag == IO_REPARSE_TAG_MOUNT_POINT ||
+	    (ni->reparse_tag == IO_REPARSE_TAG_SYMLINK &&
+	     !(ni->reparse_flags & cpu_to_le32(SYMLINK_FLAG_RELATIVE)))) {
+		if (NVolNativeSymlinkRel(ni->vol)) {
+			err = ntfs_translate_symlink_path(dentry, ni->target, &target);
+			if (err < 0)
+				return ERR_PTR(err);
+			set_delayed_call(done, kfree_link, target);
+			return target;
+		}
+	}
+
+	return ni->target;
+}
+
+static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos,
+		struct pipe_inode_info *pipe, size_t len, unsigned int flags)
+{
+	if (NVolShutdown(NTFS_SB(in->f_mapping->host->i_sb)))
+		return -EIO;
+
+	return filemap_splice_read(in, ppos, pipe, len, flags);
+}
+
+static int ntfs_ioctl_shutdown(struct super_block *sb, unsigned long arg)
+{
+	u32 flags;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (get_user(flags, (__u32 __user *)arg))
+		return -EFAULT;
+
+	return ntfs_force_shutdown(sb, flags);
+}
+
+static int ntfs_ioctl_get_volume_label(struct file *filp, unsigned long arg)
+{
+	struct ntfs_volume *vol = NTFS_SB(file_inode(filp)->i_sb);
+	char __user *buf = (char __user *)arg;
+	char label[FSLABEL_MAX];
+	ssize_t len;
+
+	mutex_lock(&vol->volume_label_lock);
+	if (!vol->volume_label) {
+		label[0] = '\0';
+		len = 0;
+	} else {
+		len = strscpy(label, vol->volume_label, sizeof(label));
+		if (len == -E2BIG)
+			len = FSLABEL_MAX - 1;
+	}
+	mutex_unlock(&vol->volume_label_lock);
+
+	if (copy_to_user(buf, label, len + 1))
+		return -EFAULT;
+	return 0;
+}
+
+static int ntfs_ioctl_set_volume_label(struct file *filp, unsigned long arg)
+{
+	struct ntfs_volume *vol = NTFS_SB(file_inode(filp)->i_sb);
+	char *label;
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	label = strndup_user((const char __user *)arg, FSLABEL_MAX);
+	if (IS_ERR(label))
+		return PTR_ERR(label);
+
+	ret = mnt_want_write_file(filp);
+	if (ret)
+		goto out;
+
+	ret = ntfs_write_volume_label(vol, label);
+	mnt_drop_write_file(filp);
+out:
+	kfree(label);
+	return ret;
+}
+
+static int ntfs_ioctl_fitrim(struct ntfs_volume *vol, unsigned long arg)
+{
+	struct fstrim_range __user *user_range;
+	struct fstrim_range range;
+	struct block_device *dev;
+	int err;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	dev = vol->sb->s_bdev;
+	if (!bdev_max_discard_sectors(dev))
+		return -EOPNOTSUPP;
+
+	user_range = (struct fstrim_range __user *)arg;
+	if (copy_from_user(&range, user_range, sizeof(range)))
+		return -EFAULT;
+
+	if (range.len == 0)
+		return -EINVAL;
+
+	if (range.len < vol->cluster_size)
+		return -EINVAL;
+
+	range.minlen = max_t(u32, range.minlen, bdev_discard_granularity(dev));
+
+	err = ntfs_trim_fs(vol, &range);
+	if (err < 0)
+		return err;
+
+	if (copy_to_user(user_range, &range, sizeof(range)))
+		return -EFAULT;
+
+	return 0;
+}
+
+long ntfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	switch (cmd) {
+	case FS_IOC_SHUTDOWN:
+		return ntfs_ioctl_shutdown(file_inode(filp)->i_sb, arg);
+	case FS_IOC_GETFSLABEL:
+		return ntfs_ioctl_get_volume_label(filp, arg);
+	case FS_IOC_SETFSLABEL:
+		return ntfs_ioctl_set_volume_label(filp, arg);
+	case FITRIM:
+		return ntfs_ioctl_fitrim(NTFS_SB(file_inode(filp)->i_sb), arg);
+	default:
+		return -ENOTTY;
+	}
+}
+
+#ifdef CONFIG_COMPAT
+long ntfs_compat_ioctl(struct file *filp, unsigned int cmd,
+		unsigned long arg)
+{
+	return ntfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static int ntfs_allocate_range(struct ntfs_inode *ni, int mode, loff_t offset,
+		loff_t len)
+{
+	struct inode *vi = VFS_I(ni);
+	struct ntfs_volume *vol = ni->vol;
+	s64 need_space;
+	loff_t old_size, new_size;
+	s64 start_vcn, end_vcn;
+	int err;
+
+	old_size = i_size_read(vi);
+	new_size = max_t(loff_t, old_size, offset + len);
+	start_vcn = ntfs_bytes_to_cluster(vol, offset);
+	end_vcn = ntfs_bytes_to_cluster(vol, offset + len - 1) + 1;
+
+	err = inode_newsize_ok(vi, new_size);
+	if (err)
+		goto out;
+
+	need_space = ntfs_bytes_to_cluster(vol, ni->allocated_size);
+	if (need_space > start_vcn)
+		need_space = end_vcn - need_space;
+	else
+		need_space = end_vcn - start_vcn;
+	if (need_space > 0 &&
+	    need_space > (atomic64_read(&vol->free_clusters) -
+			  atomic64_read(&vol->dirty_clusters))) {
+		err = -ENOSPC;
+		goto out;
+	}
+
+	err = ntfs_attr_fallocate(ni, offset, len,
+			mode & FALLOC_FL_KEEP_SIZE ? true : false);
+
+	if (!(mode & FALLOC_FL_KEEP_SIZE) && new_size != old_size)
+		i_size_write(vi, ni->data_size);
+out:
+	return err;
+}
+
+static int ntfs_punch_hole(struct ntfs_inode *ni, int mode, loff_t offset,
+		loff_t len)
+{
+	struct ntfs_volume *vol = ni->vol;
+	struct inode *vi = VFS_I(ni);
+	loff_t end_offset;
+	s64 start_vcn, end_vcn;
+	int err = 0;
+
+	loff_t offset_down = round_down(offset, max_t(unsigned int,
+				vol->cluster_size, PAGE_SIZE));
+
+	if (NVolDisableSparse(vol)) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if (offset >= ni->data_size)
+		goto out;
+
+	if (offset + len > ni->data_size)
+		end_offset = ni->data_size;
+	else
+		end_offset = offset + len;
+
+	err = filemap_write_and_wait_range(vi->i_mapping, offset_down, LLONG_MAX);
+	if (err)
+		goto out;
+	truncate_pagecache(vi, offset_down);
+
+	start_vcn = ntfs_bytes_to_cluster(vol, offset);
+	end_vcn = ntfs_bytes_to_cluster(vol, end_offset - 1) + 1;
+
+	if (offset & vol->cluster_size_mask) {
+		if (offset < ni->initialized_size) {
+			loff_t to;
+
+			to = min_t(loff_t,
+				   ntfs_cluster_to_bytes(vol, start_vcn + 1),
+				   end_offset);
+			err = iomap_zero_range(vi, offset, to - offset,
+					       NULL, &ntfs_seek_iomap_ops,
+					       &ntfs_iomap_folio_ops, NULL);
+			if (err < 0)
+				goto out;
+		}
+		if (end_vcn - start_vcn == 1)
+			goto out;
+		start_vcn++;
+	}
+
+	if (end_offset & vol->cluster_size_mask) {
+		loff_t from;
+
+		from = ntfs_cluster_to_bytes(vol, end_vcn - 1);
+		if (from < ni->initialized_size) {
+			err = iomap_zero_range(vi, from, end_offset - from,
+					       NULL, &ntfs_seek_iomap_ops,
+					       &ntfs_iomap_folio_ops, NULL);
+			if (err < 0)
+				goto out;
+		}
+		if (end_vcn - start_vcn == 1)
+			goto out;
+		end_vcn--;
+	}
+
+	mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+	err = ntfs_non_resident_attr_punch_hole(ni, start_vcn,
+			end_vcn - start_vcn);
+	mutex_unlock(&ni->mrec_lock);
+out:
+	return err;
+}
+
+static int ntfs_collapse_range(struct ntfs_inode *ni, loff_t offset, loff_t len)
+{
+	struct ntfs_volume *vol = ni->vol;
+	struct inode *vi = VFS_I(ni);
+	loff_t old_size, new_size;
+	s64 start_vcn, end_vcn;
+	int err;
+
+	loff_t offset_down = round_down(offset,
+			max_t(unsigned long, vol->cluster_size, PAGE_SIZE));
+
+	if ((offset & vol->cluster_size_mask) ||
+	    (len & vol->cluster_size_mask) ||
+	    offset >= ni->allocated_size) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	old_size = i_size_read(vi);
+	start_vcn = ntfs_bytes_to_cluster(vol, offset);
+	end_vcn = ntfs_bytes_to_cluster(vol, offset + len - 1) + 1;
+
+	if (ntfs_cluster_to_bytes(vol, end_vcn) > ni->allocated_size)
+		end_vcn = (round_up(ni->allocated_size - 1,
+			   vol->cluster_size) >> vol->cluster_size_bits) + 1;
+	new_size = old_size - ntfs_cluster_to_bytes(vol, end_vcn - start_vcn);
+	if (new_size < 0)
+		new_size = 0;
+	err = filemap_write_and_wait_range(vi->i_mapping,
+			offset_down, LLONG_MAX);
+	if (err)
+		goto out;
+
+	truncate_pagecache(vi, offset_down);
+
+	mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+	err = ntfs_non_resident_attr_collapse_range(ni, start_vcn,
+			end_vcn - start_vcn);
+	mutex_unlock(&ni->mrec_lock);
+
+	if (new_size != old_size)
+		i_size_write(vi, ni->data_size);
+out:
+	return err;
+}
+
+static int ntfs_insert_range(struct ntfs_inode *ni, loff_t offset, loff_t len)
+{
+	struct ntfs_volume *vol = ni->vol;
+	struct inode *vi = VFS_I(ni);
+	loff_t offset_down = round_down(offset,
+			max_t(unsigned long, vol->cluster_size, PAGE_SIZE));
+	loff_t alloc_size, end_offset = offset + len;
+	loff_t old_size, new_size;
+	s64 start_vcn, end_vcn;
+	int err;
+
+	if (NVolDisableSparse(vol)) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	if ((offset & vol->cluster_size_mask) ||
+	    (len & vol->cluster_size_mask) ||
+	     offset >= ni->allocated_size) {
+		err = -EINVAL;
+		goto out;
+	}
+
+	old_size = i_size_read(vi);
+	start_vcn = ntfs_bytes_to_cluster(vol, offset);
+	end_vcn = ntfs_bytes_to_cluster(vol, end_offset - 1) + 1;
+
+	new_size = old_size + ntfs_cluster_to_bytes(vol, end_vcn - start_vcn);
+	alloc_size = ni->allocated_size +
+		ntfs_cluster_to_bytes(vol, end_vcn - start_vcn);
+	if (alloc_size < 0) {
+		err = -EFBIG;
+		goto out;
+	}
+	err = inode_newsize_ok(vi, alloc_size);
+	if (err)
+		goto out;
+
+	err = filemap_write_and_wait_range(vi->i_mapping,
+			offset_down, LLONG_MAX);
+	if (err)
+		goto out;
+
+	truncate_pagecache(vi, offset_down);
+
+	mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+	err = ntfs_non_resident_attr_insert_range(ni, start_vcn,
+			end_vcn - start_vcn);
+	mutex_unlock(&ni->mrec_lock);
+
+	if (new_size != old_size)
+		i_size_write(vi, ni->data_size);
+out:
+	return err;
+}
+
+#define NTFS_FALLOC_FL_SUPPORTED					\
+		(FALLOC_FL_ALLOCATE_RANGE | FALLOC_FL_KEEP_SIZE |	\
+		 FALLOC_FL_INSERT_RANGE | FALLOC_FL_PUNCH_HOLE |	\
+		 FALLOC_FL_COLLAPSE_RANGE)
+
+static long ntfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
+{
+	struct inode *vi = file_inode(file);
+	struct ntfs_inode *ni = NTFS_I(vi);
+	struct ntfs_volume *vol = ni->vol;
+	int err = 0;
+	loff_t old_size;
+	bool map_locked = false;
+
+	if (mode & ~(NTFS_FALLOC_FL_SUPPORTED))
+		return -EOPNOTSUPP;
+
+	if (NInoCompressed(ni) || NInoEncrypted(ni) || NInoWofCompressed(ni))
+		return -EOPNOTSUPP;
+
+	if (!NVolFreeClusterKnown(vol))
+		wait_event(vol->free_waitq, NVolFreeClusterKnown(vol));
+
+	if ((ni->vol->mft_zone_end - ni->vol->mft_zone_start) == 0)
+		return -ENOSPC;
+
+	if (NInoNonResident(ni) && !NInoFullyMapped(ni)) {
+		down_write(&ni->runlist.lock);
+		err = ntfs_attr_map_whole_runlist(ni);
+		up_write(&ni->runlist.lock);
+		if (err)
+			return err;
+	}
+
+	if (!(vol->vol_flags & VOLUME_IS_DIRTY)) {
+		err = ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY);
+		if (err)
+			return err;
+	}
+
+	old_size = i_size_read(vi);
+
+	inode_lock(vi);
+	if (NInoCompressed(ni) || NInoEncrypted(ni) || NInoWofCompressed(ni)) {
+		err = -EOPNOTSUPP;
+		goto out;
+	}
+
+	inode_dio_wait(vi);
+	if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
+		    FALLOC_FL_INSERT_RANGE)) {
+		filemap_invalidate_lock(vi->i_mapping);
+		map_locked = true;
+	}
+
+	switch (mode & FALLOC_FL_MODE_MASK) {
+	case FALLOC_FL_ALLOCATE_RANGE:
+	case FALLOC_FL_KEEP_SIZE:
+		err = ntfs_allocate_range(ni, mode, offset, len);
+		break;
+	case FALLOC_FL_PUNCH_HOLE:
+		err = ntfs_punch_hole(ni, mode, offset, len);
+		break;
+	case FALLOC_FL_COLLAPSE_RANGE:
+		err = ntfs_collapse_range(ni, offset, len);
+		break;
+	case FALLOC_FL_INSERT_RANGE:
+		err = ntfs_insert_range(ni, offset, len);
+		break;
+	default:
+		err = -EOPNOTSUPP;
+	}
+
+	if (err)
+		goto out;
+
+	err = file_modified(file);
+out:
+	if (map_locked)
+		filemap_invalidate_unlock(vi->i_mapping);
+	if (!err) {
+		if (mode == 0 && NInoNonResident(ni) &&
+		    offset > old_size) {
+			truncate_pagecache(vi, old_size);
+			pagecache_isize_extended(vi, old_size, offset);
+		}
+		NInoSetFileNameDirty(ni);
+		inode_set_mtime_to_ts(vi, inode_set_ctime_current(vi));
+		mark_inode_dirty(vi);
+	}
+
+	inode_unlock(vi);
+	return err;
+}
+
+const struct file_operations ntfs_file_ops = {
+	.llseek		= ntfs_file_llseek,
+	.read_iter	= ntfs_file_read_iter,
+	.write_iter	= ntfs_file_write_iter,
+	.fsync		= ntfs_file_fsync,
+	.mmap_prepare	= ntfs_file_mmap_prepare,
+	.open		= ntfs_file_open,
+	.release	= ntfs_file_release,
+	.splice_read	= ntfs_file_splice_read,
+	.splice_write	= iter_file_splice_write,
+	.unlocked_ioctl	= ntfs_ioctl,
+#ifdef CONFIG_COMPAT
+	.compat_ioctl	= ntfs_compat_ioctl,
+#endif
+	.fallocate	= ntfs_fallocate,
+	.setlease	= generic_setlease,
+};
+
+const struct inode_operations ntfs_file_inode_ops = {
+	.setattr	= ntfs_setattr,
+	.getattr	= ntfs_getattr,
+	.listxattr	= ntfs_listxattr,
+	.get_acl	= ntfs_get_acl,
+	.set_acl	= ntfs_set_acl,
+	.fiemap		= ntfs_fiemap,
+};
+
+const struct inode_operations ntfs_symlink_inode_operations = {
+	.get_link	= ntfs_get_link,
+	.setattr	= ntfs_setattr,
+	.listxattr	= ntfs_listxattr,
+};
+
+const struct inode_operations ntfs_special_inode_operations = {
+	.setattr	= ntfs_setattr,
+	.getattr	= ntfs_getattr,
+	.listxattr	= ntfs_listxattr,
+	.get_acl	= ntfs_get_acl,
+	.set_acl	= ntfs_set_acl,
+};
+
+const struct file_operations ntfs_empty_file_ops = {};
+
+const struct inode_operations ntfs_empty_inode_ops = {};