Merge tag 'ntfs3_for_7.0' of https://github.com/Paragon-Software-Group/linux-ntfs3

Pull ntfs3 updates from Konstantin Komarov:
 "New code:
   - improve readahead for bitmap initialization and large directory scans
   - fsync files by syncing parent inodes
   - drop of preallocated clusters for sparse and compressed files
   - zero-fill folios beyond i_valid in ntfs_read_folio()
   - implement llseek SEEK_DATA/SEEK_HOLE by scanning data runs
   - implement iomap-based file operations
   - allow explicit boolean acl/prealloc mount options
   - fall-through between switch labels
   - delayed-allocation (delalloc) support

  Fixes:
   - check return value of indx_find to avoid infinite loop
   - initialize new folios before use
   - infinite loop in attr_load_runs_range on inconsistent metadata
   - infinite loop triggered by zero-sized ATTR_LIST
   - ntfs_mount_options leak in ntfs_fill_super()
   - deadlock in ni_read_folio_cmpr
   - circular locking dependency in run_unpack_ex
   - prevent infinite loops caused by the next valid being the same
   - restore NULL folio initialization in ntfs_writepages()
   - slab-out-of-bounds read in DeleteIndexEntryRoot

  Updates:
   - allow readdir() to finish after directory mutations without rewinddir()
   - handle attr_set_size() errors when truncating files
   - make ntfs_writeback_ops static
   - refactor duplicate kmemdup pattern in do_action()
   - avoid calling run_get_entry() when run == NULL in ntfs_read_run_nb_ra()

  Replaced:
   - use wait_on_buffer() directly
   - rename ni_readpage_cmpr into ni_read_folio_cmpr"

* tag 'ntfs3_for_7.0' of https://github.com/Paragon-Software-Group/linux-ntfs3: (26 commits)
  fs/ntfs3: add delayed-allocation (delalloc) support
  fs/ntfs3: avoid calling run_get_entry() when run == NULL in ntfs_read_run_nb_ra()
  fs/ntfs3: add fall-through between switch labels
  fs/ntfs3: allow explicit boolean acl/prealloc mount options
  fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot
  ntfs3: Restore NULL folio initialization in ntfs_writepages()
  ntfs3: Refactor duplicate kmemdup pattern in do_action()
  fs/ntfs3: prevent infinite loops caused by the next valid being the same
  fs/ntfs3: make ntfs_writeback_ops static
  ntfs3: fix circular locking dependency in run_unpack_ex
  fs/ntfs3: implement iomap-based file operations
  fs/ntfs3: fix deadlock in ni_read_folio_cmpr
  fs/ntfs3: implement llseek SEEK_DATA/SEEK_HOLE by scanning data runs
  fs/ntfs3: zero-fill folios beyond i_valid in ntfs_read_folio()
  fs/ntfs3: handle attr_set_size() errors when truncating files
  fs/ntfs3: drop preallocated clusters for sparse and compressed files
  fs/ntfs3: fsync files by syncing parent inodes
  fs/ntfs3: fix ntfs_mount_options leak in ntfs_fill_super()
  fs/ntfs3: allow readdir() to finish after directory mutations without rewinddir()
  fs/ntfs3: improve readahead for bitmap initialization and large directory scans
  ...

15 files changed, 1822 insertions, 1134 deletions

diff --git a/fs/ntfs3/attrib.c b/fs/ntfs3/attrib.c
index 980ae9157248..6cb9bc5d605c 100644
--- a/fs/ntfs3/attrib.c
+++ b/fs/ntfs3/attrib.c
@@ -91,7 +91,8 @@ static int attr_load_runs(struct ATTRIB *attr, struct ntfs_inode *ni,
  * run_deallocate_ex - Deallocate clusters.
  */
 static int run_deallocate_ex(struct ntfs_sb_info *sbi, struct runs_tree *run,
-			     CLST vcn, CLST len, CLST *done, bool trim)
+			     CLST vcn, CLST len, CLST *done, bool trim,
+			     struct runs_tree *run_da)
 {
 	int err = 0;
 	CLST vcn_next, vcn0 = vcn, lcn, clen, dn = 0;
@@ -120,6 +121,16 @@ failed:
 			if (sbi) {
 				/* mark bitmap range [lcn + clen) as free and trim clusters. */
 				mark_as_free_ex(sbi, lcn, clen, trim);
+
+				if (run_da) {
+					CLST da_len;
+					if (!run_remove_range(run_da, vcn, clen,
+							      &da_len)) {
+						err = -ENOMEM;
+						goto failed;
+					}
+					ntfs_sub_da(sbi, da_len);
+				}
 			}
 			dn += clen;
 		}
@@ -147,9 +158,10 @@ out:
  * attr_allocate_clusters - Find free space, mark it as used and store in @run.
  */
 int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
-			   CLST vcn, CLST lcn, CLST len, CLST *pre_alloc,
-			   enum ALLOCATE_OPT opt, CLST *alen, const size_t fr,
-			   CLST *new_lcn, CLST *new_len)
+			   struct runs_tree *run_da, CLST vcn, CLST lcn,
+			   CLST len, CLST *pre_alloc, enum ALLOCATE_OPT opt,
+			   CLST *alen, const size_t fr, CLST *new_lcn,
+			   CLST *new_len)
 {
 	int err;
 	CLST flen, vcn0 = vcn, pre = pre_alloc ? *pre_alloc : 0;
@@ -166,6 +178,12 @@ int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
 			continue;
 		}
 
+		if (err == -ENOSPC && new_len && vcn - vcn0) {
+			/* Keep already allocated clusters. */
+			*alen = vcn - vcn0;
+			return 0;
+		}
+
 		if (err)
 			goto out;
 
@@ -179,12 +197,21 @@ int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
 
 		/* Add new fragment into run storage. */
 		if (!run_add_entry(run, vcn, lcn, flen, opt & ALLOCATE_MFT)) {
+undo_alloc:
 			/* Undo last 'ntfs_look_for_free_space' */
 			mark_as_free_ex(sbi, lcn, len, false);
 			err = -ENOMEM;
 			goto out;
 		}
 
+		if (run_da) {
+			CLST da_len;
+			if (!run_remove_range(run_da, vcn, flen, &da_len)) {
+				goto undo_alloc;
+			}
+			ntfs_sub_da(sbi, da_len);
+		}
+
 		if (opt & ALLOCATE_ZERO) {
 			u8 shift = sbi->cluster_bits - SECTOR_SHIFT;
 
@@ -199,7 +226,7 @@ int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
 		vcn += flen;
 
 		if (flen >= len || (opt & ALLOCATE_MFT) ||
-		    (fr && run->count - cnt >= fr)) {
+		    (opt & ALLOCATE_ONE_FR) || (fr && run->count - cnt >= fr)) {
 			*alen = vcn - vcn0;
 			return 0;
 		}
@@ -210,7 +237,8 @@ int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
 out:
 	/* Undo 'ntfs_look_for_free_space' */
 	if (vcn - vcn0) {
-		run_deallocate_ex(sbi, run, vcn0, vcn - vcn0, NULL, false);
+		run_deallocate_ex(sbi, run, vcn0, vcn - vcn0, NULL, false,
+				  run_da);
 		run_truncate(run, vcn0);
 	}
 
@@ -275,7 +303,7 @@ int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
 	} else {
 		const char *data = resident_data(attr);
 
-		err = attr_allocate_clusters(sbi, run, 0, 0, len, NULL,
+		err = attr_allocate_clusters(sbi, run, NULL, 0, 0, len, NULL,
 					     ALLOCATE_DEF, &alen, 0, NULL,
 					     NULL);
 		if (err)
@@ -391,7 +419,7 @@ static int attr_set_size_res(struct ntfs_inode *ni, struct ATTRIB *attr,
 }
 
 /*
- * attr_set_size - Change the size of attribute.
+ * attr_set_size_ex - Change the size of attribute.
  *
  * Extend:
  *   - Sparse/compressed: No allocated clusters.
@@ -399,24 +427,28 @@ static int attr_set_size_res(struct ntfs_inode *ni, struct ATTRIB *attr,
  * Shrink:
  *   - No deallocate if @keep_prealloc is set.
  */
-int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
-		  const __le16 *name, u8 name_len, struct runs_tree *run,
-		  u64 new_size, const u64 *new_valid, bool keep_prealloc,
-		  struct ATTRIB **ret)
+int attr_set_size_ex(struct ntfs_inode *ni, enum ATTR_TYPE type,
+		     const __le16 *name, u8 name_len, struct runs_tree *run,
+		     u64 new_size, const u64 *new_valid, bool keep_prealloc,
+		     struct ATTRIB **ret, bool no_da)
 {
 	int err = 0;
 	struct ntfs_sb_info *sbi = ni->mi.sbi;
 	u8 cluster_bits = sbi->cluster_bits;
 	bool is_mft = ni->mi.rno == MFT_REC_MFT && type == ATTR_DATA &&
 		      !name_len;
-	u64 old_valid, old_size, old_alloc, new_alloc, new_alloc_tmp;
+	u64 old_valid, old_size, old_alloc, new_alloc_tmp;
+	u64 new_alloc = 0;
 	struct ATTRIB *attr = NULL, *attr_b;
 	struct ATTR_LIST_ENTRY *le, *le_b;
 	struct mft_inode *mi, *mi_b;
 	CLST alen, vcn, lcn, new_alen, old_alen, svcn, evcn;
 	CLST next_svcn, pre_alloc = -1, done = 0;
-	bool is_ext, is_bad = false;
+	bool is_ext = false, is_bad = false;
 	bool dirty = false;
+	struct runs_tree *run_da = run == &ni->file.run ? &ni->file.run_da :
+							  NULL;
+	bool da = !is_mft && sbi->options->delalloc && run_da && !no_da;
 	u32 align;
 	struct MFT_REC *rec;
 
@@ -448,8 +480,11 @@ again:
 
 	is_ext = is_attr_ext(attr_b);
 	align = sbi->cluster_size;
-	if (is_ext)
+	if (is_ext) {
 		align <<= attr_b->nres.c_unit;
+		keep_prealloc = false;
+		da = false;
+	}
 
 	old_valid = le64_to_cpu(attr_b->nres.valid_size);
 	old_size = le64_to_cpu(attr_b->nres.data_size);
@@ -467,6 +502,37 @@ again_1:
 		goto ok;
 	}
 
+	if (da &&
+	    (vcn = old_alen + run_len(&ni->file.run_da), new_alen > vcn)) {
+		/* Resize up normal file. Delay new clusters allocation. */
+		alen = new_alen - vcn;
+
+		if (ntfs_check_free_space(sbi, alen, 0, true)) {
+			if (!run_add_entry(&ni->file.run_da, vcn, SPARSE_LCN,
+					   alen, false)) {
+				err = -ENOMEM;
+				goto out;
+			}
+
+			ntfs_add_da(sbi, alen);
+			goto ok1;
+		}
+	}
+
+	if (!keep_prealloc && run_da && run_da->count &&
+	    (vcn = run_get_max_vcn(run_da), new_alen < vcn)) {
+		/* Shrink delayed clusters. */
+
+		/* Try to remove fragment from delay allocated run. */
+		if (!run_remove_range(run_da, new_alen, vcn - new_alen,
+				      &alen)) {
+			err = -ENOMEM;
+			goto out;
+		}
+
+		ntfs_sub_da(sbi, alen);
+	}
+
 	vcn = old_alen - 1;
 
 	svcn = le64_to_cpu(attr_b->nres.svcn);
@@ -572,7 +638,8 @@ add_alloc_in_same_attr_seg:
 		} else {
 			/* ~3 bytes per fragment. */
 			err = attr_allocate_clusters(
-				sbi, run, vcn, lcn, to_allocate, &pre_alloc,
+				sbi, run, run_da, vcn, lcn, to_allocate,
+				&pre_alloc,
 				is_mft ? ALLOCATE_MFT : ALLOCATE_DEF, &alen,
 				is_mft ? 0 :
 					 (sbi->record_size -
@@ -751,14 +818,14 @@ pack_runs:
 		mi_b->dirty = dirty = true;
 
 		err = run_deallocate_ex(sbi, run, vcn, evcn - vcn + 1, &dlen,
-					true);
+					true, run_da);
 		if (err)
 			goto out;
 
 		if (is_ext) {
 			/* dlen - really deallocated clusters. */
 			le64_sub_cpu(&attr_b->nres.total_size,
-				     ((u64)dlen << cluster_bits));
+				     (u64)dlen << cluster_bits);
 		}
 
 		run_truncate(run, vcn);
@@ -813,14 +880,14 @@ ok1:
 	if (((type == ATTR_DATA && !name_len) ||
 	     (type == ATTR_ALLOC && name == I30_NAME))) {
 		/* Update inode_set_bytes. */
-		if (attr_b->non_res) {
-			new_alloc = le64_to_cpu(attr_b->nres.alloc_size);
-			if (inode_get_bytes(&ni->vfs_inode) != new_alloc) {
-				inode_set_bytes(&ni->vfs_inode, new_alloc);
-				dirty = true;
-			}
+		if (attr_b->non_res &&
+		    inode_get_bytes(&ni->vfs_inode) != new_alloc) {
+			inode_set_bytes(&ni->vfs_inode, new_alloc);
+			dirty = true;
 		}
 
+		i_size_write(&ni->vfs_inode, new_size);
+
 		/* Don't forget to update duplicate information in parent. */
 		if (dirty) {
 			ni->ni_flags |= NI_FLAG_UPDATE_PARENT;
@@ -861,7 +928,7 @@ restore_run:
 		is_bad = true;
 
 undo_1:
-	run_deallocate_ex(sbi, run, vcn, alen, NULL, false);
+	run_deallocate_ex(sbi, run, vcn, alen, NULL, false, run_da);
 
 	run_truncate(run, vcn);
 out:
@@ -884,43 +951,74 @@ bad_inode:
  *  - new allocated clusters are zeroed via blkdev_issue_zeroout.
  */
 int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
-			CLST *len, bool *new, bool zero)
+			CLST *len, bool *new, bool zero, void **res, bool no_da)
 {
-	int err = 0;
-	struct runs_tree *run = &ni->file.run;
-	struct ntfs_sb_info *sbi;
-	u8 cluster_bits;
-	struct ATTRIB *attr, *attr_b;
-	struct ATTR_LIST_ENTRY *le, *le_b;
-	struct mft_inode *mi, *mi_b;
-	CLST hint, svcn, to_alloc, evcn1, next_svcn, asize, end, vcn0, alen;
-	CLST alloc, evcn;
-	unsigned fr;
-	u64 total_size, total_size0;
-	int step = 0;
+	int err;
 
 	if (new)
 		*new = false;
+	if (res)
+		*res = NULL;
 
 	/* Try to find in cache. */
 	down_read(&ni->file.run_lock);
-	if (!run_lookup_entry(run, vcn, lcn, len, NULL))
+	if (!no_da && run_lookup_entry(&ni->file.run_da, vcn, lcn, len, NULL)) {
+		/* The requested vcn is delay allocated. */
+		*lcn = DELALLOC_LCN;
+	} else if (run_lookup_entry(&ni->file.run, vcn, lcn, len, NULL)) {
+		/* The requested vcn is known in current run. */
+	} else {
 		*len = 0;
+	}
 	up_read(&ni->file.run_lock);
 
 	if (*len && (*lcn != SPARSE_LCN || !new))
 		return 0; /* Fast normal way without allocation. */
 
 	/* No cluster in cache or we need to allocate cluster in hole. */
-	sbi = ni->mi.sbi;
-	cluster_bits = sbi->cluster_bits;
-
 	ni_lock(ni);
 	down_write(&ni->file.run_lock);
 
-	/* Repeat the code above (under write lock). */
-	if (!run_lookup_entry(run, vcn, lcn, len, NULL))
+	err = attr_data_get_block_locked(ni, vcn, clen, lcn, len, new, zero,
+					 res, no_da);
+
+	up_write(&ni->file.run_lock);
+	ni_unlock(ni);
+
+	return err;
+}
+
+/*
+ * attr_data_get_block_locked - Helper for attr_data_get_block.
+ */
+int attr_data_get_block_locked(struct ntfs_inode *ni, CLST vcn, CLST clen,
+			       CLST *lcn, CLST *len, bool *new, bool zero,
+			       void **res, bool no_da)
+{
+	int err = 0;
+	struct ntfs_sb_info *sbi = ni->mi.sbi;
+	struct runs_tree *run = &ni->file.run;
+	struct runs_tree *run_da = &ni->file.run_da;
+	bool da = sbi->options->delalloc && !no_da;
+	u8 cluster_bits;
+	struct ATTRIB *attr, *attr_b;
+	struct ATTR_LIST_ENTRY *le, *le_b;
+	struct mft_inode *mi, *mi_b;
+	CLST hint, svcn, to_alloc, evcn1, next_svcn, asize, end, vcn0;
+	CLST alloc, evcn;
+	unsigned fr;
+	u64 total_size, total_size0;
+	int step;
+
+again:
+	if (da && run_lookup_entry(run_da, vcn, lcn, len, NULL)) {
+		/* The requested vcn is delay allocated. */
+		*lcn = DELALLOC_LCN;
+	} else if (run_lookup_entry(run, vcn, lcn, len, NULL)) {
+		/* The requested vcn is known in current run. */
+	} else {
 		*len = 0;
+	}
 
 	if (*len) {
 		if (*lcn != SPARSE_LCN || !new)
@@ -929,6 +1027,9 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 			clen = *len;
 	}
 
+	cluster_bits = sbi->cluster_bits;
+	step = 0;
+
 	le_b = NULL;
 	attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL, &mi_b);
 	if (!attr_b) {
@@ -937,8 +1038,15 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 	}
 
 	if (!attr_b->non_res) {
+		u32 data_size = le32_to_cpu(attr_b->res.data_size);
 		*lcn = RESIDENT_LCN;
-		*len = 1;
+		*len = data_size;
+		if (res && data_size) {
+			*res = kmemdup(resident_data(attr_b), data_size,
+				       GFP_KERNEL);
+			if (!*res)
+				err = -ENOMEM;
+		}
 		goto out;
 	}
 
@@ -948,7 +1056,7 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 			err = -EINVAL;
 		} else {
 			*len = 1;
-			*lcn = SPARSE_LCN;
+			*lcn = EOF_LCN;
 		}
 		goto out;
 	}
@@ -1026,7 +1134,8 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 		to_alloc = ((vcn0 + clen + clst_per_frame - 1) & cmask) - vcn;
 		if (fr < clst_per_frame)
 			fr = clst_per_frame;
-		zero = true;
+		if (vcn != vcn0)
+			zero = true;
 
 		/* Check if 'vcn' and 'vcn0' in different attribute segments. */
 		if (vcn < svcn || evcn1 <= vcn) {
@@ -1043,11 +1152,38 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 			if (err)
 				goto out;
 		}
+		da = false; /* no delalloc for compressed file. */
 	}
 
 	if (vcn + to_alloc > asize)
 		to_alloc = asize - vcn;
 
+	if (da) {
+		CLST rlen1, rlen2;
+		if (!ntfs_check_free_space(sbi, to_alloc, 0, true)) {
+			err = ni_allocate_da_blocks_locked(ni);
+			if (err)
+				goto out;
+			/* Layout of records may be changed. Start again without 'da'. */
+			da = false;
+			goto again;
+		}
+
+		/* run_add_entry consolidates existed ranges. */
+		rlen1 = run_len(run_da);
+		if (!run_add_entry(run_da, vcn, SPARSE_LCN, to_alloc, false)) {
+			err = -ENOMEM;
+			goto out;
+		}
+		rlen2 = run_len(run_da);
+
+		/* new added delay clusters = rlen2 - rlen1. */
+		ntfs_add_da(sbi, rlen2 - rlen1);
+		*len = to_alloc;
+		*lcn = DELALLOC_LCN;
+		goto ok;
+	}
+
 	/* Get the last LCN to allocate from. */
 	hint = 0;
 
@@ -1062,18 +1198,19 @@ int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
 	}
 
 	/* Allocate and zeroout new clusters. */
-	err = attr_allocate_clusters(sbi, run, vcn, hint + 1, to_alloc, NULL,
-				     zero ? ALLOCATE_ZERO : ALLOCATE_DEF, &alen,
-				     fr, lcn, len);
+	err = attr_allocate_clusters(sbi, run, run_da, vcn, hint + 1, to_alloc,
+				     NULL,
+				     zero ? ALLOCATE_ZERO : ALLOCATE_ONE_FR,
+				     len, fr, lcn, len);
 	if (err)
 		goto out;
 	*new = true;
 	step = 1;
 
-	end = vcn + alen;
+	end = vcn + *len;
 	/* Save 'total_size0' to restore if error. */
 	total_size0 = le64_to_cpu(attr_b->nres.total_size);
-	total_size = total_size0 + ((u64)alen << cluster_bits);
+	total_size = total_size0 + ((u64)*len << cluster_bits);
 
 	if (vcn != vcn0) {
 		if (!run_lookup_entry(run, vcn0, lcn, len, NULL)) {
@@ -1139,7 +1276,7 @@ repack:
 	 * in 'ni_insert_nonresident'.
 	 * Return in advance -ENOSPC here if there are no free cluster and no free MFT.
 	 */
-	if (!ntfs_check_for_free_space(sbi, 1, 1)) {
+	if (!ntfs_check_free_space(sbi, 1, 1, false)) {
 		/* Undo step 1. */
 		err = -ENOSPC;
 		goto undo1;
@@ -1224,8 +1361,6 @@ out:
 		/* Too complex to restore. */
 		_ntfs_bad_inode(&ni->vfs_inode);
 	}
-	up_write(&ni->file.run_lock);
-	ni_unlock(ni);
 
 	return err;
 
@@ -1234,41 +1369,14 @@ undo1:
 	attr_b->nres.total_size = cpu_to_le64(total_size0);
 	inode_set_bytes(&ni->vfs_inode, total_size0);
 
-	if (run_deallocate_ex(sbi, run, vcn, alen, NULL, false) ||
-	    !run_add_entry(run, vcn, SPARSE_LCN, alen, false) ||
+	if (run_deallocate_ex(sbi, run, vcn, *len, NULL, false, run_da) ||
+	    !run_add_entry(run, vcn, SPARSE_LCN, *len, false) ||
 	    mi_pack_runs(mi, attr, run, max(end, evcn1) - svcn)) {
 		_ntfs_bad_inode(&ni->vfs_inode);
 	}
 	goto out;
 }
 
-int attr_data_read_resident(struct ntfs_inode *ni, struct folio *folio)
-{
-	u64 vbo;
-	struct ATTRIB *attr;
-	u32 data_size;
-	size_t len;
-
-	attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL, NULL);
-	if (!attr)
-		return -EINVAL;
-
-	if (attr->non_res)
-		return E_NTFS_NONRESIDENT;
-
-	vbo = folio->index << PAGE_SHIFT;
-	data_size = le32_to_cpu(attr->res.data_size);
-	if (vbo > data_size)
-		len = 0;
-	else
-		len = min(data_size - vbo, folio_size(folio));
-
-	folio_fill_tail(folio, 0, resident_data(attr) + vbo, len);
-	folio_mark_uptodate(folio);
-
-	return 0;
-}
-
 int attr_data_write_resident(struct ntfs_inode *ni, struct folio *folio)
 {
 	u64 vbo;
@@ -1285,7 +1393,7 @@ int attr_data_write_resident(struct ntfs_inode *ni, struct folio *folio)
 		return E_NTFS_NONRESIDENT;
 	}
 
-	vbo = folio->index << PAGE_SHIFT;
+	vbo = folio_pos(folio);
 	data_size = le32_to_cpu(attr->res.data_size);
 	if (vbo < data_size) {
 		char *data = resident_data(attr);
@@ -1354,19 +1462,27 @@ int attr_load_runs_range(struct ntfs_inode *ni, enum ATTR_TYPE type,
 	CLST vcn;
 	CLST vcn_last = (to - 1) >> cluster_bits;
 	CLST lcn, clen;
-	int err;
+	int err = 0;
+	int retry = 0;
 
 	for (vcn = from >> cluster_bits; vcn <= vcn_last; vcn += clen) {
-		if (!run_lookup_entry(run, vcn, &lcn, &clen, NULL)) {
-			err = attr_load_runs_vcn(ni, type, name, name_len, run,
-						 vcn);
-			if (err)
-				return err;
-			clen = 0; /* Next run_lookup_entry(vcn) must be success. */
+		if (run_lookup_entry(run, vcn, &lcn, &clen, NULL)) {
+			retry = 0;
+			continue;
+		}
+		if (retry) {
+			err = -EINVAL;
+			break;
 		}
+		err = attr_load_runs_vcn(ni, type, name, name_len, run, vcn);
+		if (err)
+			break;
+
+		clen = 0; /* Next run_lookup_entry(vcn) must be success. */
+		retry++;
 	}
 
-	return 0;
+	return err;
 }
 
 #ifdef CONFIG_NTFS3_LZX_XPRESS
@@ -1689,7 +1805,7 @@ int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size,
 
 	if (len < clst_data) {
 		err = run_deallocate_ex(sbi, run, vcn + len, clst_data - len,
-					NULL, true);
+					NULL, true, NULL);
 		if (err)
 			goto out;
 
@@ -1709,7 +1825,7 @@ int attr_allocate_frame(struct ntfs_inode *ni, CLST frame, size_t compr_size,
 			hint = -1;
 		}
 
-		err = attr_allocate_clusters(sbi, run, vcn + clst_data,
+		err = attr_allocate_clusters(sbi, run, NULL, vcn + clst_data,
 					     hint + 1, len - clst_data, NULL,
 					     ALLOCATE_DEF, &alen, 0, NULL,
 					     NULL);
@@ -1864,6 +1980,7 @@ int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes)
 	CLST vcn, end;
 	u64 valid_size, data_size, alloc_size, total_size;
 	u32 mask;
+	u64 i_size;
 	__le16 a_flags;
 
 	if (!bytes)
@@ -1879,52 +1996,79 @@ int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes)
 		return 0;
 	}
 
-	data_size = le64_to_cpu(attr_b->nres.data_size);
-	alloc_size = le64_to_cpu(attr_b->nres.alloc_size);
-	a_flags = attr_b->flags;
-
-	if (is_attr_ext(attr_b)) {
-		total_size = le64_to_cpu(attr_b->nres.total_size);
-		mask = (sbi->cluster_size << attr_b->nres.c_unit) - 1;
-	} else {
-		total_size = alloc_size;
-		mask = sbi->cluster_mask;
-	}
-
-	if ((vbo & mask) || (bytes & mask)) {
+	mask = is_attr_ext(attr_b) ?
+		       ((sbi->cluster_size << attr_b->nres.c_unit) - 1) :
+		       sbi->cluster_mask;
+	if ((vbo | bytes) & mask) {
 		/* Allow to collapse only cluster aligned ranges. */
 		return -EINVAL;
 	}
 
-	if (vbo > data_size)
+	/* i_size - size of file with delay allocated clusters. */
+	i_size = ni->vfs_inode.i_size;
+
+	if (vbo > i_size)
 		return -EINVAL;
 
 	down_write(&ni->file.run_lock);
 
-	if (vbo + bytes >= data_size) {
-		u64 new_valid = min(ni->i_valid, vbo);
+	if (vbo + bytes >= i_size) {
+		valid_size = min(ni->i_valid, vbo);
 
 		/* Simple truncate file at 'vbo'. */
 		truncate_setsize(&ni->vfs_inode, vbo);
 		err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, vbo,
-				    &new_valid, true, NULL);
+				    &valid_size, true);
 
-		if (!err && new_valid < ni->i_valid)
-			ni->i_valid = new_valid;
+		if (!err && valid_size < ni->i_valid)
+			ni->i_valid = valid_size;
 
 		goto out;
 	}
 
-	/*
-	 * Enumerate all attribute segments and collapse.
-	 */
-	alen = alloc_size >> sbi->cluster_bits;
 	vcn = vbo >> sbi->cluster_bits;
 	len = bytes >> sbi->cluster_bits;
 	end = vcn + len;
 	dealloc = 0;
 	done = 0;
 
+	/*
+	 * Check delayed clusters.
+	 */
+	if (ni->file.run_da.count) {
+		struct runs_tree *run_da = &ni->file.run_da;
+		if (run_is_mapped_full(run_da, vcn, end - 1)) {
+			/*
+			 * The requested range is full in delayed clusters.
+			 */
+			err = attr_set_size_ex(ni, ATTR_DATA, NULL, 0, run,
+					       i_size - bytes, NULL, false,
+					       NULL, true);
+			goto out;
+		}
+
+		/* Collapse request crosses real and delayed clusters. */
+		err = ni_allocate_da_blocks_locked(ni);
+		if (err)
+			goto out;
+
+		/* Layout of records maybe changed. */
+		le_b = NULL;
+		attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL,
+				      &mi_b);
+		if (!attr_b || !attr_b->non_res) {
+			err = -ENOENT;
+			goto out;
+		}
+	}
+
+	data_size = le64_to_cpu(attr_b->nres.data_size);
+	alloc_size = le64_to_cpu(attr_b->nres.alloc_size);
+	total_size = is_attr_ext(attr_b) ?
+			     le64_to_cpu(attr_b->nres.total_size) :
+			     alloc_size;
+	alen = alloc_size >> sbi->cluster_bits;
+	a_flags = attr_b->flags;
 	svcn = le64_to_cpu(attr_b->nres.svcn);
 	evcn1 = le64_to_cpu(attr_b->nres.evcn) + 1;
 
@@ -1947,6 +2091,9 @@ int attr_collapse_range(struct ntfs_inode *ni, u64 vbo, u64 bytes)
 		goto out;
 	}
 
+	/*
+	 * Enumerate all attribute segments and collapse.
+	 */
 	for (;;) {
 		CLST vcn1, eat, next_svcn;
 
@@ -1974,13 +2121,13 @@ check_seg:
 		vcn1 = vcn + done; /* original vcn in attr/run. */
 		eat = min(end, evcn1) - vcn1;
 
-		err = run_deallocate_ex(sbi, run, vcn1, eat, &dealloc, true);
+		err = run_deallocate_ex(sbi, run, vcn1, eat, &dealloc, true,
+					NULL);
 		if (err)
 			goto out;
 
 		if (svcn + eat < evcn1) {
 			/* Collapse a part of this attribute segment. */
-
 			if (!run_collapse_range(run, vcn1, eat, done)) {
 				err = -ENOMEM;
 				goto out;
@@ -2161,9 +2308,9 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size)
 		bytes = alloc_size;
 	bytes -= vbo;
 
-	if ((vbo & mask) || (bytes & mask)) {
+	if ((vbo | bytes) & mask) {
 		/* We have to zero a range(s). */
-		if (frame_size == NULL) {
+		if (!frame_size) {
 			/* Caller insists range is aligned. */
 			return -EINVAL;
 		}
@@ -2222,7 +2369,8 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size)
 		 * Calculate how many clusters there are.
 		 * Don't do any destructive actions.
 		 */
-		err = run_deallocate_ex(NULL, run, vcn1, zero, &hole2, false);
+		err = run_deallocate_ex(NULL, run, vcn1, zero, &hole2, false,
+					NULL);
 		if (err)
 			goto done;
 
@@ -2260,7 +2408,8 @@ int attr_punch_hole(struct ntfs_inode *ni, u64 vbo, u64 bytes, u32 *frame_size)
 		}
 
 		/* Real deallocate. Should not fail. */
-		run_deallocate_ex(sbi, &run2, vcn1, zero, &hole, true);
+		run_deallocate_ex(sbi, &run2, vcn1, zero, &hole, true,
+				  &ni->file.run_da);
 
 next_attr:
 		/* Free all allocated memory. */
@@ -2372,7 +2521,7 @@ int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes)
 		return -EINVAL;
 	}
 
-	if ((vbo & mask) || (bytes & mask)) {
+	if ((vbo | bytes) & mask) {
 		/* Allow to insert only frame aligned ranges. */
 		return -EINVAL;
 	}
@@ -2391,7 +2540,7 @@ int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes)
 
 	if (!attr_b->non_res) {
 		err = attr_set_size(ni, ATTR_DATA, NULL, 0, run,
-				    data_size + bytes, NULL, false, NULL);
+				    data_size + bytes, NULL, false);
 
 		le_b = NULL;
 		attr_b = ni_find_attr(ni, NULL, &le_b, ATTR_DATA, NULL, 0, NULL,
@@ -2414,7 +2563,7 @@ int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes)
 			goto done;
 		}
 
-		/* Resident files becomes nonresident. */
+		/* Resident file becomes nonresident. */
 		data_size = le64_to_cpu(attr_b->nres.data_size);
 		alloc_size = le64_to_cpu(attr_b->nres.alloc_size);
 	}
@@ -2451,10 +2600,13 @@ int attr_insert_range(struct ntfs_inode *ni, u64 vbo, u64 bytes)
 	if (err)
 		goto out;
 
-	if (!run_insert_range(run, vcn, len)) {
-		err = -ENOMEM;
+	err = run_insert_range(run, vcn, len);
+	if (err)
+		goto out;
+
+	err = run_insert_range_da(&ni->file.run_da, vcn, len);
+	if (err)
 		goto out;
-	}
 
 	/* Try to pack in current record as much as possible. */
 	err = mi_pack_runs(mi, attr, run, evcn1 + len - svcn);
diff --git a/fs/ntfs3/attrlist.c b/fs/ntfs3/attrlist.c
index a4d74bed74fa..270a29323530 100644
--- a/fs/ntfs3/attrlist.c
+++ b/fs/ntfs3/attrlist.c
@@ -52,6 +52,11 @@ int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr)
 
 	if (!attr->non_res) {
 		lsize = le32_to_cpu(attr->res.data_size);
+		if (!lsize) {
+			err = -EINVAL;
+			goto out;
+		}
+
 		/* attr is resident: lsize < record_size (1K or 4K) */
 		le = kvmalloc(al_aligned(lsize), GFP_KERNEL);
 		if (!le) {
@@ -66,6 +71,10 @@ int ntfs_load_attr_list(struct ntfs_inode *ni, struct ATTRIB *attr)
 		u16 run_off = le16_to_cpu(attr->nres.run_off);
 
 		lsize = le64_to_cpu(attr->nres.data_size);
+		if (!lsize) {
+			err = -EINVAL;
+			goto out;
+		}
 
 		run_init(&ni->attr_list.run);
 
@@ -336,8 +345,8 @@ int al_add_le(struct ntfs_inode *ni, enum ATTR_TYPE type, const __le16 *name,
 	le->id = id;
 	memcpy(le->name, name, sizeof(short) * name_len);
 
-	err = attr_set_size(ni, ATTR_LIST, NULL, 0, &al->run, new_size,
-			    &new_size, true, &attr);
+	err = attr_set_size_ex(ni, ATTR_LIST, NULL, 0, &al->run, new_size,
+			       &new_size, true, &attr, false);
 	if (err) {
 		/* Undo memmove above. */
 		memmove(le, Add2Ptr(le, sz), old_size - off);
@@ -395,8 +404,8 @@ int al_update(struct ntfs_inode *ni, int sync)
 	 * Attribute list increased on demand in al_add_le.
 	 * Attribute list decreased here.
 	 */
-	err = attr_set_size(ni, ATTR_LIST, NULL, 0, &al->run, al->size, NULL,
-			    false, &attr);
+	err = attr_set_size_ex(ni, ATTR_LIST, NULL, 0, &al->run, al->size, NULL,
+			       false, &attr, false);
 	if (err)
 		goto out;
 
diff --git a/fs/ntfs3/bitmap.c b/fs/ntfs3/bitmap.c
index 65d05e6a0566..db7d0ecfb469 100644
--- a/fs/ntfs3/bitmap.c
+++ b/fs/ntfs3/bitmap.c
@@ -508,6 +508,8 @@ static int wnd_rescan(struct wnd_bitmap *wnd)
 	size_t wpos, wbit, iw, vbo;
 	struct buffer_head *bh = NULL;
 	CLST lcn, clen;
+	struct file_ra_state *ra;
+	struct address_space *mapping = sb->s_bdev->bd_mapping;
 
 	wnd->uptodated = 0;
 	wnd->extent_max = 0;
@@ -516,6 +518,13 @@ static int wnd_rescan(struct wnd_bitmap *wnd)
 
 	vbo = 0;
 
+	/* Allocate in memory instead of stack. Not critical if failed. */
+	ra = kzalloc(sizeof(*ra), GFP_NOFS);
+	if (ra) {
+		file_ra_state_init(ra, mapping);
+		ra->ra_pages = (wnd->nbits / 8 + PAGE_SIZE - 1) >> PAGE_SHIFT;
+	}
+
 	for (iw = 0; iw < wnd->nwnd; iw++) {
 		if (iw + 1 == wnd->nwnd)
 			wbits = wnd->bits_last;
@@ -552,6 +561,13 @@ static int wnd_rescan(struct wnd_bitmap *wnd)
 			len = ((u64)clen << cluster_bits) - off;
 		}
 
+		if (ra) {
+			pgoff_t idx = lbo >> PAGE_SHIFT;
+			if (!ra_has_index(ra, idx))
+				page_cache_sync_readahead(mapping, ra, NULL,
+							  idx, 1);
+		}
+
 		bh = ntfs_bread(sb, lbo >> sb->s_blocksize_bits);
 		if (!bh) {
 			err = -EIO;
@@ -638,6 +654,7 @@ next_wnd:
 	}
 
 out:
+	kfree(ra);
 	return err;
 }
 
diff --git a/fs/ntfs3/dir.c b/fs/ntfs3/dir.c
index 596f8c62f033..4652a56ad105 100644
--- a/fs/ntfs3/dir.c
+++ b/fs/ntfs3/dir.c
@@ -393,33 +393,77 @@ static int ntfs_read_hdr(struct ntfs_sb_info *sbi, struct ntfs_inode *ni,
  * ntfs_readdir - file_operations::iterate_shared
  *
  * Use non sorted enumeration.
- * We have an example of broken volume where sorted enumeration
- * counts each name twice.
+ * Sorted enumeration may result infinite loop if names tree contains loop.
  */
 static int ntfs_readdir(struct file *file, struct dir_context *ctx)
 {
 	const struct INDEX_ROOT *root;
-	u64 vbo;
 	size_t bit;
-	loff_t eod;
 	int err = 0;
 	struct inode *dir = file_inode(file);
 	struct ntfs_inode *ni = ntfs_i(dir);
 	struct super_block *sb = dir->i_sb;
 	struct ntfs_sb_info *sbi = sb->s_fs_info;
 	loff_t i_size = i_size_read(dir);
-	u32 pos = ctx->pos;
+	u64 pos = ctx->pos;
 	u8 *name = NULL;
 	struct indx_node *node = NULL;
 	u8 index_bits = ni->dir.index_bits;
+	size_t max_bit = i_size >> ni->dir.index_bits;
+	loff_t eod = i_size + sbi->record_size;
 
 	/* Name is a buffer of PATH_MAX length. */
 	static_assert(NTFS_NAME_LEN * 4 < PATH_MAX);
 
-	eod = i_size + sbi->record_size;
+	if (!pos) {
+		/*
+		 * ni->dir.version increments each directory change.
+		 * Save the initial value of ni->dir.version.
+		 */
+		file->private_data = (void *)ni->dir.version;
+	}
 
-	if (pos >= eod)
-		return 0;
+	if (pos >= eod) {
+		if (file->private_data == (void *)ni->dir.version) {
+			/* No changes since first readdir. */
+			return 0;
+		}
+
+		/*
+		 * Handle directories that changed after the initial readdir().
+		 *
+		 * Some user space code implements recursive removal like this instead
+		 * of calling rmdir(2) directly:
+		 *
+		 *      fd = opendir(path);
+		 *      while ((dent = readdir(fd)))
+		 *              unlinkat(dirfd(fd), dent->d_name, 0);
+		 *      closedir(fd);
+		 *
+		 * POSIX leaves unspecified what readdir() should return once the
+		 * directory has been modified after opendir()/rewinddir(), so this
+		 * pattern is not guaranteed to work on all filesystems or platforms.
+		 *
+		 * In ntfs3 the internal name tree may be reshaped while entries are
+		 * being removed, so there is no stable anchor for continuing a
+		 * single-pass walk based on the original readdir() order.
+		 *
+		 * In practice some widely used tools (for example certain rm(1)
+		 * implementations) have used this readdir()/unlink() loop, and some
+		 * filesystems behave in a way that effectively makes it work in the
+		 * common case.
+		 *
+		 * The code below follows that practice and tries to provide
+		 * "rmdir-like" behaviour for such callers on ntfs3, even though the
+		 * situation is not strictly defined by the APIs.
+		 *
+		 * Apple documents the same readdir()/unlink() issue and a workaround
+		 * for HFS file systems in:
+		 * https://web.archive.org/web/20220122122948/https:/support.apple.com/kb/TA21420?locale=en_US
+		 */
+		ctx->pos = pos = 3;
+		file->private_data = (void *)ni->dir.version;
+	}
 
 	if (!dir_emit_dots(file, ctx))
 		return 0;
@@ -454,58 +498,58 @@ static int ntfs_readdir(struct file *file, struct dir_context *ctx)
 	if (pos >= sbi->record_size) {
 		bit = (pos - sbi->record_size) >> index_bits;
 	} else {
+		/*
+		 * Add each name from root in 'ctx'.
+		 */
 		err = ntfs_read_hdr(sbi, ni, &root->ihdr, 0, pos, name, ctx);
 		if (err)
 			goto out;
 		bit = 0;
 	}
 
-	if (!i_size) {
-		ctx->pos = eod;
-		goto out;
-	}
-
-	for (;;) {
-		vbo = (u64)bit << index_bits;
-		if (vbo >= i_size) {
-			ctx->pos = eod;
-			goto out;
-		}
-
+	/*
+	 * Enumerate indexes until the end of dir.
+	 */
+	for (; bit < max_bit; bit += 1) {
+		/* Get the next used index. */
 		err = indx_used_bit(&ni->dir, ni, &bit);
 		if (err)
 			goto out;
 
 		if (bit == MINUS_ONE_T) {
-			ctx->pos = eod;
-			goto out;
+			/* no more used indexes. end of dir. */
+			break;
 		}
 
-		vbo = (u64)bit << index_bits;
-		if (vbo >= i_size) {
+		if (bit >= max_bit) {
+			/* Corrupted directory. */
 			err = -EINVAL;
 			goto out;
 		}
 
-		err = indx_read(&ni->dir, ni, bit << ni->dir.idx2vbn_bits,
-				&node);
+		err = indx_read_ra(&ni->dir, ni, bit << ni->dir.idx2vbn_bits,
+				   &node, &file->f_ra);
 		if (err)
 			goto out;
 
+		/*
+		 * Add each name from index in 'ctx'.
+		 */
 		err = ntfs_read_hdr(sbi, ni, &node->index->ihdr,
-				    vbo + sbi->record_size, pos, name, ctx);
+				    ((u64)bit << index_bits) + sbi->record_size,
+				    pos, name, ctx);
 		if (err)
 			goto out;
-
-		bit += 1;
 	}
 
 out:
-
 	kfree(name);
 	put_indx_node(node);
 
-	if (err == 1) {
+	if (!err) {
+		/* End of directory. */
+		ctx->pos = eod;
+	} else if (err == 1) {
 		/* 'ctx' is full. */
 		err = 0;
 	} else if (err == -ENOENT) {
@@ -624,7 +668,7 @@ const struct file_operations ntfs_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
 	.iterate_shared	= ntfs_readdir,
-	.fsync		= generic_file_fsync,
+	.fsync		= ntfs_file_fsync,
 	.open		= ntfs_file_open,
 	.unlocked_ioctl = ntfs_ioctl,
 #ifdef CONFIG_COMPAT
diff --git a/fs/ntfs3/file.c b/fs/ntfs3/file.c
index 6cb4479072a6..ae8c47cac406 100644
--- a/fs/ntfs3/file.c
+++ b/fs/ntfs3/file.c
@@ -15,6 +15,7 @@
 #include <linux/fiemap.h>
 #include <linux/fileattr.h>
 #include <linux/filelock.h>
+#include <linux/iomap.h>
 
 #include "debug.h"
 #include "ntfs.h"
@@ -26,6 +27,38 @@
  */
 #define NTFS3_IOC_SHUTDOWN _IOR('X', 125, __u32)
 
+/*
+ * Helper for ntfs_should_use_dio.
+ */
+static u32 ntfs_dio_alignment(struct inode *inode)
+{
+	struct ntfs_inode *ni = ntfs_i(inode);
+
+	if (is_resident(ni)) {
+		/* Check delalloc. */
+		if (!ni->file.run_da.count)
+			return 0;
+	}
+
+	/* In most cases this is bdev_logical_block_size(bdev). */
+	return ni->mi.sbi->bdev_blocksize;
+}
+
+/*
+ * Returns %true if the given DIO request should be attempted with DIO, or
+ * %false if it should fall back to buffered I/O.
+ */
+static bool ntfs_should_use_dio(struct kiocb *iocb, struct iov_iter *iter)
+{
+	struct inode *inode = file_inode(iocb->ki_filp);
+	u32 dio_align = ntfs_dio_alignment(inode);
+
+	if (!dio_align)
+		return false;
+
+	return IS_ALIGNED(iocb->ki_pos | iov_iter_alignment(iter), dio_align);
+}
+
 static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg)
 {
 	struct fstrim_range __user *user_range;
@@ -186,13 +219,10 @@ int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
 
 static int ntfs_extend_initialized_size(struct file *file,
 					struct ntfs_inode *ni,
-					const loff_t valid,
 					const loff_t new_valid)
 {
 	struct inode *inode = &ni->vfs_inode;
-	struct address_space *mapping = inode->i_mapping;
-	struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
-	loff_t pos = valid;
+	const loff_t valid = ni->i_valid;
 	int err;
 
 	if (valid >= new_valid)
@@ -203,142 +233,41 @@ static int ntfs_extend_initialized_size(struct file *file,
 		return 0;
 	}
 
-	WARN_ON(is_compressed(ni));
-
-	for (;;) {
-		u32 zerofrom, len;
-		struct folio *folio;
-		u8 bits;
-		CLST vcn, lcn, clen;
-
-		if (is_sparsed(ni)) {
-			bits = sbi->cluster_bits;
-			vcn = pos >> bits;
-
-			err = attr_data_get_block(ni, vcn, 1, &lcn, &clen, NULL,
-						  false);
-			if (err)
-				goto out;
-
-			if (lcn == SPARSE_LCN) {
-				pos = ((loff_t)clen + vcn) << bits;
-				ni->i_valid = pos;
-				goto next;
-			}
-		}
-
-		zerofrom = pos & (PAGE_SIZE - 1);
-		len = PAGE_SIZE - zerofrom;
-
-		if (pos + len > new_valid)
-			len = new_valid - pos;
-
-		err = ntfs_write_begin(NULL, mapping, pos, len, &folio, NULL);
-		if (err)
-			goto out;
-
-		folio_zero_range(folio, zerofrom, folio_size(folio) - zerofrom);
-
-		err = ntfs_write_end(NULL, mapping, pos, len, len, folio, NULL);
-		if (err < 0)
-			goto out;
-		pos += len;
-
-next:
-		if (pos >= new_valid)
-			break;
-
-		balance_dirty_pages_ratelimited(mapping);
-		cond_resched();
+	err = iomap_zero_range(inode, valid, new_valid - valid, NULL,
+			       &ntfs_iomap_ops, &ntfs_iomap_folio_ops, NULL);
+	if (err) {
+		ni->i_valid = valid;
+		ntfs_inode_warn(inode,
+				"failed to extend initialized size to %llx.",
+				new_valid);
+		return err;
 	}
 
 	return 0;
-
-out:
-	ni->i_valid = valid;
-	ntfs_inode_warn(inode, "failed to extend initialized size to %llx.",
-			new_valid);
-	return err;
 }
 
-/*
- * ntfs_zero_range - Helper function for punch_hole.
- *
- * It zeroes a range [vbo, vbo_to).
- */
-static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to)
+static void ntfs_filemap_close(struct vm_area_struct *vma)
 {
-	int err = 0;
-	struct address_space *mapping = inode->i_mapping;
-	u32 blocksize = i_blocksize(inode);
-	pgoff_t idx = vbo >> PAGE_SHIFT;
-	u32 from = vbo & (PAGE_SIZE - 1);
-	pgoff_t idx_end = (vbo_to + PAGE_SIZE - 1) >> PAGE_SHIFT;
-	loff_t page_off;
-	struct buffer_head *head, *bh;
-	u32 bh_next, bh_off, to;
-	sector_t iblock;
-	struct folio *folio;
-	bool dirty = false;
-
-	for (; idx < idx_end; idx += 1, from = 0) {
-		page_off = (loff_t)idx << PAGE_SHIFT;
-		to = (page_off + PAGE_SIZE) > vbo_to ? (vbo_to - page_off) :
-						       PAGE_SIZE;
-		iblock = page_off >> inode->i_blkbits;
-
-		folio = __filemap_get_folio(
-			mapping, idx, FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
-			mapping_gfp_constraint(mapping, ~__GFP_FS));
-		if (IS_ERR(folio))
-			return PTR_ERR(folio);
-
-		head = folio_buffers(folio);
-		if (!head)
-			head = create_empty_buffers(folio, blocksize, 0);
-
-		bh = head;
-		bh_off = 0;
-		do {
-			bh_next = bh_off + blocksize;
-
-			if (bh_next <= from || bh_off >= to)
-				continue;
-
-			if (!buffer_mapped(bh)) {
-				ntfs_get_block(inode, iblock, bh, 0);
-				/* Unmapped? It's a hole - nothing to do. */
-				if (!buffer_mapped(bh))
-					continue;
-			}
-
-			/* Ok, it's mapped. Make sure it's up-to-date. */
-			if (folio_test_uptodate(folio))
-				set_buffer_uptodate(bh);
-			else if (bh_read(bh, 0) < 0) {
-				err = -EIO;
-				folio_unlock(folio);
-				folio_put(folio);
-				goto out;
-			}
-
-			mark_buffer_dirty(bh);
-		} while (bh_off = bh_next, iblock += 1,
-			 head != (bh = bh->b_this_page));
-
-		folio_zero_segment(folio, from, to);
-		dirty = true;
+	struct inode *inode = file_inode(vma->vm_file);
+	struct ntfs_inode *ni = ntfs_i(inode);
+	u64 from = (u64)vma->vm_pgoff << PAGE_SHIFT;
+	u64 to = min_t(u64, i_size_read(inode),
+		       from + vma->vm_end - vma->vm_start);
 
-		folio_unlock(folio);
-		folio_put(folio);
-		cond_resched();
-	}
-out:
-	if (dirty)
+	if (ni->i_valid < to) {
+		ni->i_valid = to;
 		mark_inode_dirty(inode);
-	return err;
+	}
 }
 
+/* Copy of generic_file_vm_ops. */
+static const struct vm_operations_struct ntfs_file_vm_ops = {
+	.close = ntfs_filemap_close,
+	.fault = filemap_fault,
+	.map_pages = filemap_map_pages,
+	.page_mkwrite = filemap_page_mkwrite,
+};
+
 /*
  * ntfs_file_mmap_prepare - file_operations::mmap_prepare
  */
@@ -347,7 +276,6 @@ static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
 	struct file *file = desc->file;
 	struct inode *inode = file_inode(file);
 	struct ntfs_inode *ni = ntfs_i(inode);
-	u64 from = ((u64)desc->pgoff << PAGE_SHIFT);
 	bool rw = desc->vm_flags & VM_WRITE;
 	int err;
 
@@ -379,7 +307,8 @@ static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
 	}
 
 	if (rw) {
-		u64 to = min_t(loff_t, i_size_read(inode),
+		u64 from = (u64)desc->pgoff << PAGE_SHIFT;
+		u64 to = min_t(u64, i_size_read(inode),
 			       from + vma_desc_size(desc));
 
 		if (is_sparsed(ni)) {
@@ -392,7 +321,8 @@ static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
 
 			for (; vcn < end; vcn += len) {
 				err = attr_data_get_block(ni, vcn, 1, &lcn,
-							  &len, &new, true);
+							  &len, &new, true,
+							  NULL, false);
 				if (err)
 					goto out;
 			}
@@ -403,8 +333,7 @@ static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
 				err = -EAGAIN;
 				goto out;
 			}
-			err = ntfs_extend_initialized_size(file, ni,
-							   ni->i_valid, to);
+			err = ntfs_extend_initialized_size(file, ni, to);
 			inode_unlock(inode);
 			if (err)
 				goto out;
@@ -412,6 +341,8 @@ static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
 	}
 
 	err = generic_file_mmap_prepare(desc);
+	if (!err && rw)
+		desc->vm_ops = &ntfs_file_vm_ops;
 out:
 	return err;
 }
@@ -432,55 +363,23 @@ static int ntfs_extend(struct inode *inode, loff_t pos, size_t count,
 	ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_DIRTY);
 
 	if (end > inode->i_size) {
+		/*
+		 * Normal files: increase file size, allocate space.
+		 * Sparse/Compressed: increase file size. No space allocated.
+		 */
 		err = ntfs_set_size(inode, end);
 		if (err)
 			goto out;
 	}
 
 	if (extend_init && !is_compressed(ni)) {
-		err = ntfs_extend_initialized_size(file, ni, ni->i_valid, pos);
+		err = ntfs_extend_initialized_size(file, ni, pos);
 		if (err)
 			goto out;
 	} else {
 		err = 0;
 	}
 
-	if (file && is_sparsed(ni)) {
-		/*
-		 * This code optimizes large writes to sparse file.
-		 * TODO: merge this fragment with fallocate fragment.
-		 */
-		struct ntfs_sb_info *sbi = ni->mi.sbi;
-		CLST vcn = pos >> sbi->cluster_bits;
-		CLST cend = bytes_to_cluster(sbi, end);
-		CLST cend_v = bytes_to_cluster(sbi, ni->i_valid);
-		CLST lcn, clen;
-		bool new;
-
-		if (cend_v > cend)
-			cend_v = cend;
-
-		/*
-		 * Allocate and zero new clusters.
-		 * Zeroing these clusters may be too long.
-		 */
-		for (; vcn < cend_v; vcn += clen) {
-			err = attr_data_get_block(ni, vcn, cend_v - vcn, &lcn,
-						  &clen, &new, true);
-			if (err)
-				goto out;
-		}
-		/*
-		 * Allocate but not zero new clusters.
-		 */
-		for (; vcn < cend; vcn += clen) {
-			err = attr_data_get_block(ni, vcn, cend - vcn, &lcn,
-						  &clen, &new, false);
-			if (err)
-				goto out;
-		}
-	}
-
 	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
 	mark_inode_dirty(inode);
 
@@ -504,53 +403,37 @@ out:
 
 static int ntfs_truncate(struct inode *inode, loff_t new_size)
 {
-	struct super_block *sb = inode->i_sb;
+	int err;
 	struct ntfs_inode *ni = ntfs_i(inode);
-	int err, dirty = 0;
-	u64 new_valid;
-
-	if (!S_ISREG(inode->i_mode))
-		return 0;
-
-	if (is_compressed(ni)) {
-		if (ni->i_valid > new_size)
-			ni->i_valid = new_size;
-	} else {
-		err = block_truncate_page(inode->i_mapping, new_size,
-					  ntfs_get_block);
-		if (err)
-			return err;
-	}
-
-	new_valid = ntfs_up_block(sb, min_t(u64, ni->i_valid, new_size));
+	u64 new_valid = min_t(u64, ni->i_valid, new_size);
 
 	truncate_setsize(inode, new_size);
 
 	ni_lock(ni);
 
 	down_write(&ni->file.run_lock);
-	err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
-			    &new_valid, ni->mi.sbi->options->prealloc, NULL);
+	err = attr_set_size_ex(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
+			       &new_valid, ni->mi.sbi->options->prealloc, NULL,
+			       false);
 	up_write(&ni->file.run_lock);
 
-	if (new_valid < ni->i_valid)
-		ni->i_valid = new_valid;
+	ni->i_valid = new_valid;
 
 	ni_unlock(ni);
 
+	if (err)
+		return err;
+
 	ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
 	inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode));
 	if (!IS_DIRSYNC(inode)) {
-		dirty = 1;
+		mark_inode_dirty(inode);
 	} else {
 		err = ntfs_sync_inode(inode);
 		if (err)
 			return err;
 	}
 
-	if (dirty)
-		mark_inode_dirty(inode);
-
 	return 0;
 }
 
@@ -623,7 +506,7 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
 
 	if (mode & FALLOC_FL_PUNCH_HOLE) {
 		u32 frame_size;
-		loff_t mask, vbo_a, end_a, tmp;
+		loff_t mask, vbo_a, end_a, tmp, from;
 
 		err = filemap_write_and_wait_range(mapping, vbo_down,
 						   LLONG_MAX);
@@ -643,24 +526,24 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
 
 		/* Process not aligned punch. */
 		err = 0;
+		if (end > i_size)
+			end = i_size;
 		mask = frame_size - 1;
 		vbo_a = (vbo + mask) & ~mask;
 		end_a = end & ~mask;
 
 		tmp = min(vbo_a, end);
-		if (tmp > vbo) {
-			err = ntfs_zero_range(inode, vbo, tmp);
+		from = min_t(loff_t, ni->i_valid, vbo);
+		/* Zero head of punch. */
+		if (tmp > from) {
+			err = iomap_zero_range(inode, from, tmp - from, NULL,
+					       &ntfs_iomap_ops,
+					       &ntfs_iomap_folio_ops, NULL);
 			if (err)
 				goto out;
 		}
 
-		if (vbo < end_a && end_a < end) {
-			err = ntfs_zero_range(inode, end_a, end);
-			if (err)
-				goto out;
-		}
-
-		/* Aligned punch_hole */
+		/* Aligned punch_hole. Deallocate clusters. */
 		if (end_a > vbo_a) {
 			ni_lock(ni);
 			err = attr_punch_hole(ni, vbo_a, end_a - vbo_a, NULL);
@@ -668,6 +551,15 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
 			if (err)
 				goto out;
 		}
+
+		/* Zero tail of punch. */
+		if (vbo < end_a && end_a < end) {
+			err = iomap_zero_range(inode, end_a, end - end_a, NULL,
+					       &ntfs_iomap_ops,
+					       &ntfs_iomap_folio_ops, NULL);
+			if (err)
+				goto out;
+		}
 	} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
 		/*
 		 * Write tail of the last page before removed range since
@@ -765,17 +657,26 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
 			for (; vcn < cend_v; vcn += clen) {
 				err = attr_data_get_block(ni, vcn, cend_v - vcn,
 							  &lcn, &clen, &new,
-							  true);
+							  true, NULL, false);
 				if (err)
 					goto out;
 			}
+
+			/*
+			 * Moving up 'valid size'.
+			 */
+			err = ntfs_extend_initialized_size(
+				file, ni, (u64)cend_v << cluster_bits);
+			if (err)
+				goto out;
+
 			/*
 			 * Allocate but not zero new clusters.
 			 */
 			for (; vcn < cend; vcn += clen) {
 				err = attr_data_get_block(ni, vcn, cend - vcn,
 							  &lcn, &clen, &new,
-							  false);
+							  false, NULL, false);
 				if (err)
 					goto out;
 			}
@@ -786,10 +687,11 @@ static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len)
 			/* True - Keep preallocated. */
 			err = attr_set_size(ni, ATTR_DATA, NULL, 0,
 					    &ni->file.run, i_size, &ni->i_valid,
-					    true, NULL);
+					    true);
 			ni_unlock(ni);
 			if (err)
 				goto out;
+			i_size_write(inode, i_size);
 		} else if (new_size > i_size) {
 			i_size_write(inode, new_size);
 		}
@@ -926,12 +828,18 @@ static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
 	struct ntfs_inode *ni = ntfs_i(inode);
+	size_t bytes = iov_iter_count(iter);
+	loff_t valid, i_size, vbo, end;
+	unsigned int dio_flags;
 	ssize_t err;
 
 	err = check_read_restriction(inode);
 	if (err)
 		return err;
 
+	if (!bytes)
+		return 0; /* skip atime */
+
 	if (is_compressed(ni)) {
 		if (iocb->ki_flags & IOCB_DIRECT) {
 			ntfs_inode_warn(
@@ -942,17 +850,63 @@ static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
 		file->f_ra.ra_pages = 0;
 	}
 
-	/* Check minimum alignment for dio. */
-	if (iocb->ki_flags & IOCB_DIRECT) {
-		struct super_block *sb = inode->i_sb;
-		struct ntfs_sb_info *sbi = sb->s_fs_info;
-		if ((iocb->ki_pos | iov_iter_alignment(iter)) &
-		    sbi->bdev_blocksize_mask) {
-			iocb->ki_flags &= ~IOCB_DIRECT;
+	/* Fallback to buffered I/O if the inode does not support direct I/O. */
+	if (!(iocb->ki_flags & IOCB_DIRECT) ||
+	    !ntfs_should_use_dio(iocb, iter)) {
+		iocb->ki_flags &= ~IOCB_DIRECT;
+		return generic_file_read_iter(iocb, iter);
+	}
+
+	if (iocb->ki_flags & IOCB_NOWAIT) {
+		if (!inode_trylock_shared(inode))
+			return -EAGAIN;
+	} else {
+		inode_lock_shared(inode);
+	}
+
+	vbo = iocb->ki_pos;
+	end = vbo + bytes;
+	dio_flags = 0;
+	valid = ni->i_valid;
+	i_size = inode->i_size;
+
+	if (vbo < valid) {
+		if (valid < end) {
+			/* read cross 'valid' size. */
+			dio_flags |= IOMAP_DIO_FORCE_WAIT;
+		}
+
+		if (ni->file.run_da.count) {
+			/* Direct I/O is not compatible with delalloc. */
+			err = ni_allocate_da_blocks(ni);
+			if (err)
+				goto out;
 		}
+
+		err = iomap_dio_rw(iocb, iter, &ntfs_iomap_ops, NULL, dio_flags,
+				   NULL, 0);
+
+		if (err <= 0)
+			goto out;
+		end = vbo + err;
+		if (valid < end) {
+			size_t to_zero = end - valid;
+			/* Fix iter. */
+			iov_iter_revert(iter, to_zero);
+			iov_iter_zero(to_zero, iter);
+		}
+	} else if (vbo < i_size) {
+		if (end > i_size)
+			bytes = i_size - vbo;
+		iov_iter_zero(bytes, iter);
+		iocb->ki_pos += bytes;
+		err = bytes;
 	}
 
-	return generic_file_read_iter(iocb, iter);
+out:
+	inode_unlock_shared(inode);
+	file_accessed(iocb->ki_filp);
+	return err;
 }
 
 /*
@@ -996,7 +950,7 @@ static int ntfs_get_frame_pages(struct address_space *mapping, pgoff_t index,
 
 		folio = __filemap_get_folio(mapping, index,
 					    FGP_LOCK | FGP_ACCESSED | FGP_CREAT,
-					    gfp_mask);
+					    gfp_mask | __GFP_ZERO);
 		if (IS_ERR(folio)) {
 			while (npages--) {
 				folio = page_folio(pages[npages]);
@@ -1073,7 +1027,7 @@ static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from)
 		off = valid & (frame_size - 1);
 
 		err = attr_data_get_block(ni, frame << NTFS_LZNT_CUNIT, 1, &lcn,
-					  &clen, NULL, false);
+					  &clen, NULL, false, NULL, false);
 		if (err)
 			goto out;
 
@@ -1265,6 +1219,9 @@ static int check_write_restriction(struct inode *inode)
 		return -EOPNOTSUPP;
 	}
 
+	if (unlikely(IS_IMMUTABLE(inode)))
+		return -EPERM;
+
 	return 0;
 }
 
@@ -1276,8 +1233,7 @@ static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	struct file *file = iocb->ki_filp;
 	struct inode *inode = file_inode(file);
 	struct ntfs_inode *ni = ntfs_i(inode);
-	ssize_t ret;
-	int err;
+	ssize_t ret, err;
 
 	if (!inode_trylock(inode)) {
 		if (iocb->ki_flags & IOCB_NOWAIT)
@@ -1315,15 +1271,75 @@ static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	if (ret)
 		goto out;
 
-	ret = is_compressed(ni) ? ntfs_compress_write(iocb, from) :
-				  __generic_file_write_iter(iocb, from);
+	if (is_compressed(ni)) {
+		ret = ntfs_compress_write(iocb, from);
+		goto out;
+	}
+
+	/* Fallback to buffered I/O if the inode does not support direct I/O. */
+	if (!(iocb->ki_flags & IOCB_DIRECT) ||
+	    !ntfs_should_use_dio(iocb, from)) {
+		iocb->ki_flags &= ~IOCB_DIRECT;
+
+		ret = iomap_file_buffered_write(iocb, from, &ntfs_iomap_ops,
+						&ntfs_iomap_folio_ops, NULL);
+		inode_unlock(inode);
+
+		if (likely(ret > 0))
+			ret = generic_write_sync(iocb, ret);
+
+		return ret;
+	}
+
+	if (ni->file.run_da.count) {
+		/* Direct I/O is not compatible with delalloc. */
+		ret = ni_allocate_da_blocks(ni);
+		if (ret)
+			goto out;
+	}
+
+	ret = iomap_dio_rw(iocb, from, &ntfs_iomap_ops, NULL, 0, NULL, 0);
+
+	if (ret == -ENOTBLK) {
+		/* Returns -ENOTBLK in case of a page invalidation failure for writes.*/
+		/* The callers needs to fall back to buffered I/O in this case. */
+		ret = 0;
+	}
+
+	if (ret >= 0 && iov_iter_count(from)) {
+		loff_t offset = iocb->ki_pos, endbyte;
+
+		iocb->ki_flags &= ~IOCB_DIRECT;
+		err = iomap_file_buffered_write(iocb, from, &ntfs_iomap_ops,
+						&ntfs_iomap_folio_ops, NULL);
+		if (err < 0) {
+			ret = err;
+			goto out;
+		}
+
+		/*
+		* We need to ensure that the pages within the page cache for
+		* the range covered by this I/O are written to disk and
+		* invalidated. This is in attempt to preserve the expected
+		* direct I/O semantics in the case we fallback to buffered I/O
+		* to complete off the I/O request.
+		*/
+		ret += err;
+		endbyte = offset + err - 1;
+		err = filemap_write_and_wait_range(inode->i_mapping, offset,
+						   endbyte);
+		if (err) {
+			ret = err;
+			goto out;
+		}
+
+		invalidate_mapping_pages(inode->i_mapping, offset >> PAGE_SHIFT,
+					 endbyte >> PAGE_SHIFT);
+	}
 
 out:
 	inode_unlock(inode);
 
-	if (ret > 0)
-		ret = generic_write_sync(iocb, ret);
-
 	return ret;
 }
 
@@ -1362,39 +1378,49 @@ int ntfs_file_open(struct inode *inode, struct file *file)
 #endif
 	}
 
+	file->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT;
+
 	return generic_file_open(inode, file);
 }
 
 /*
  * ntfs_file_release - file_operations::release
+ *
+ * Called when an inode is released. Note that this is different
+ * from ntfs_file_open: open gets called at every open, but release
+ * gets called only when /all/ the files are closed.
  */
 static int ntfs_file_release(struct inode *inode, struct file *file)
 {
-	struct ntfs_inode *ni = ntfs_i(inode);
-	struct ntfs_sb_info *sbi = ni->mi.sbi;
-	int err = 0;
-
-	/* If we are last writer on the inode, drop the block reservation. */
-	if (sbi->options->prealloc &&
-	    ((file->f_mode & FMODE_WRITE) &&
-	     atomic_read(&inode->i_writecount) == 1)
-	    /*
-	    * The only file when inode->i_fop = &ntfs_file_operations and
-	    * init_rwsem(&ni->file.run_lock) is not called explicitly is MFT.
-	    *
-	    * Add additional check here.
-	    */
-	    && inode->i_ino != MFT_REC_MFT) {
+	int err;
+	struct ntfs_inode *ni;
+
+	if (!(file->f_mode & FMODE_WRITE) ||
+	    atomic_read(&inode->i_writecount) != 1 ||
+	    inode->i_ino == MFT_REC_MFT) {
+		return 0;
+	}
+
+	/* Close the last writer on the inode. */
+	ni = ntfs_i(inode);
+
+	/* Allocate delayed blocks (clusters). */
+	err = ni_allocate_da_blocks(ni);
+	if (err)
+		goto out;
+
+	if (ni->mi.sbi->options->prealloc) {
 		ni_lock(ni);
 		down_write(&ni->file.run_lock);
 
+		/* Deallocate preallocated. */
 		err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run,
-				    i_size_read(inode), &ni->i_valid, false,
-				    NULL);
+				    inode->i_size, &ni->i_valid, false);
 
 		up_write(&ni->file.run_lock);
 		ni_unlock(ni);
 	}
+out:
 	return err;
 }
 
@@ -1411,16 +1437,30 @@ int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	if (unlikely(is_bad_ni(ni)))
 		return -EINVAL;
 
-	err = fiemap_prep(inode, fieinfo, start, &len, ~FIEMAP_FLAG_XATTR);
-	if (err)
-		return err;
+	if (is_compressed(ni)) {
+		/* Unfortunately cp -r incorrectly treats compressed clusters. */
+		ntfs_inode_warn(inode,
+				"fiemap is not supported for compressed file");
+		return -EOPNOTSUPP;
+	}
 
-	ni_lock(ni);
+	if (S_ISDIR(inode->i_mode)) {
+		/* TODO: add support for dirs (ATTR_ALLOC). */
+		ntfs_inode_warn(inode,
+				"fiemap is not supported for directories");
+		return -EOPNOTSUPP;
+	}
 
-	err = ni_fiemap(ni, fieinfo, start, len);
+	if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
+		ntfs_inode_warn(inode, "fiemap(xattr) is not supported");
+		return -EOPNOTSUPP;
+	}
 
-	ni_unlock(ni);
+	inode_lock_shared(inode);
 
+	err = iomap_fiemap(inode, fieinfo, start, len, &ntfs_iomap_ops);
+
+	inode_unlock_shared(inode);
 	return err;
 }
 
@@ -1444,13 +1484,62 @@ static ssize_t ntfs_file_splice_write(struct pipe_inode_info *pipe,
 /*
  * ntfs_file_fsync - file_operations::fsync
  */
-static int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
+int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 {
 	struct inode *inode = file_inode(file);
-	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
+	struct super_block *sb = inode->i_sb;
+	struct ntfs_sb_info *sbi = sb->s_fs_info;
+	int err, ret;
+
+	if (unlikely(ntfs3_forced_shutdown(sb)))
 		return -EIO;
 
-	return generic_file_fsync(file, start, end, datasync);
+	ret = file_write_and_wait_range(file, start, end);
+	if (ret)
+		return ret;
+
+	ret = write_inode_now(inode, !datasync);
+
+	if (!ret) {
+		ret = ni_write_parents(ntfs_i(inode), !datasync);
+	}
+
+	if (!ret) {
+		ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
+		ntfs_update_mftmirr(sbi);
+	}
+
+	err = sync_blockdev(sb->s_bdev);
+	if (unlikely(err && !ret))
+		ret = err;
+	if (!ret)
+		blkdev_issue_flush(sb->s_bdev);
+	return ret;
+}
+
+/*
+ * ntfs_llseek - file_operations::llseek
+ */
+static loff_t ntfs_llseek(struct file *file, loff_t offset, int whence)
+{
+	struct inode *inode = file->f_mapping->host;
+	struct ntfs_inode *ni = ntfs_i(inode);
+	loff_t maxbytes = ntfs_get_maxbytes(ni);
+	loff_t ret;
+
+	if (whence == SEEK_DATA || whence == SEEK_HOLE) {
+		inode_lock_shared(inode);
+		/* Scan file for hole or data. */
+		ret = ni_seek_data_or_hole(ni, offset, whence == SEEK_DATA);
+		inode_unlock_shared(inode);
+
+		if (ret >= 0)
+			ret = vfs_setpos(file, ret, maxbytes);
+	} else {
+		ret = generic_file_llseek_size(file, offset, whence, maxbytes,
+					       i_size_read(inode));
+	}
+	return ret;
 }
 
 // clang-format off
@@ -1464,7 +1553,7 @@ const struct inode_operations ntfs_file_inode_operations = {
 };
 
 const struct file_operations ntfs_file_operations = {
-	.llseek		= generic_file_llseek,
+	.llseek		= ntfs_llseek,
 	.read_iter	= ntfs_file_read_iter,
 	.write_iter	= ntfs_file_write_iter,
 	.unlocked_ioctl = ntfs_ioctl,
diff --git a/fs/ntfs3/frecord.c b/fs/ntfs3/frecord.c
index 641ddaf8d4a0..bd0fa481e4b3 100644
--- a/fs/ntfs3/frecord.c
+++ b/fs/ntfs3/frecord.c
@@ -123,6 +123,8 @@ void ni_clear(struct ntfs_inode *ni)
 		indx_clear(&ni->dir);
 	else {
 		run_close(&ni->file.run);
+		ntfs_sub_da(ni->mi.sbi, run_len(&ni->file.run_da));
+		run_close(&ni->file.run_da);
 #ifdef CONFIG_NTFS3_LZX_XPRESS
 		if (ni->file.offs_folio) {
 			/* On-demand allocated page for offsets. */
@@ -1850,183 +1852,11 @@ enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
 	return REPARSE_LINK;
 }
 
-/*
- * ni_fiemap - Helper for file_fiemap().
- *
- * Assumed ni_lock.
- * TODO: Less aggressive locks.
- */
-int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
-	      __u64 vbo, __u64 len)
-{
-	int err = 0;
-	struct ntfs_sb_info *sbi = ni->mi.sbi;
-	u8 cluster_bits = sbi->cluster_bits;
-	struct runs_tree run;
-	struct ATTRIB *attr;
-	CLST vcn = vbo >> cluster_bits;
-	CLST lcn, clen;
-	u64 valid = ni->i_valid;
-	u64 lbo, bytes;
-	u64 end, alloc_size;
-	size_t idx = -1;
-	u32 flags;
-	bool ok;
-
-	run_init(&run);
-	if (S_ISDIR(ni->vfs_inode.i_mode)) {
-		attr = ni_find_attr(ni, NULL, NULL, ATTR_ALLOC, I30_NAME,
-				    ARRAY_SIZE(I30_NAME), NULL, NULL);
-	} else {
-		attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0, NULL,
-				    NULL);
-		if (!attr) {
-			err = -EINVAL;
-			goto out;
-		}
-		if (is_attr_compressed(attr)) {
-			/* Unfortunately cp -r incorrectly treats compressed clusters. */
-			err = -EOPNOTSUPP;
-			ntfs_inode_warn(
-				&ni->vfs_inode,
-				"fiemap is not supported for compressed file (cp -r)");
-			goto out;
-		}
-	}
-
-	if (!attr || !attr->non_res) {
-		err = fiemap_fill_next_extent(
-			fieinfo, 0, 0,
-			attr ? le32_to_cpu(attr->res.data_size) : 0,
-			FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_LAST |
-				FIEMAP_EXTENT_MERGED);
-		goto out;
-	}
-
-	end = vbo + len;
-	alloc_size = le64_to_cpu(attr->nres.alloc_size);
-	if (end > alloc_size)
-		end = alloc_size;
-
-	while (vbo < end) {
-		if (idx == -1) {
-			ok = run_lookup_entry(&run, vcn, &lcn, &clen, &idx);
-		} else {
-			CLST vcn_next = vcn;
-
-			ok = run_get_entry(&run, ++idx, &vcn, &lcn, &clen) &&
-			     vcn == vcn_next;
-			if (!ok)
-				vcn = vcn_next;
-		}
-
-		if (!ok) {
-			err = attr_load_runs_vcn(ni, attr->type,
-						 attr_name(attr),
-						 attr->name_len, &run, vcn);
-
-			if (err)
-				break;
-
-			ok = run_lookup_entry(&run, vcn, &lcn, &clen, &idx);
-
-			if (!ok) {
-				err = -EINVAL;
-				break;
-			}
-		}
-
-		if (!clen) {
-			err = -EINVAL; // ?
-			break;
-		}
-
-		if (lcn == SPARSE_LCN) {
-			vcn += clen;
-			vbo = (u64)vcn << cluster_bits;
-			continue;
-		}
-
-		flags = FIEMAP_EXTENT_MERGED;
-		if (S_ISDIR(ni->vfs_inode.i_mode)) {
-			;
-		} else if (is_attr_compressed(attr)) {
-			CLST clst_data;
-
-			err = attr_is_frame_compressed(ni, attr,
-						       vcn >> attr->nres.c_unit,
-						       &clst_data, &run);
-			if (err)
-				break;
-			if (clst_data < NTFS_LZNT_CLUSTERS)
-				flags |= FIEMAP_EXTENT_ENCODED;
-		} else if (is_attr_encrypted(attr)) {
-			flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
-		}
-
-		vbo = (u64)vcn << cluster_bits;
-		bytes = (u64)clen << cluster_bits;
-		lbo = (u64)lcn << cluster_bits;
-
-		vcn += clen;
-
-		if (vbo + bytes >= end)
-			bytes = end - vbo;
-
-		if (vbo + bytes <= valid) {
-			;
-		} else if (vbo >= valid) {
-			flags |= FIEMAP_EXTENT_UNWRITTEN;
-		} else {
-			/* vbo < valid && valid < vbo + bytes */
-			u64 dlen = valid - vbo;
-
-			if (vbo + dlen >= end)
-				flags |= FIEMAP_EXTENT_LAST;
-
-			err = fiemap_fill_next_extent(fieinfo, vbo, lbo, dlen,
-						      flags);
-
-			if (err < 0)
-				break;
-			if (err == 1) {
-				err = 0;
-				break;
-			}
-
-			vbo = valid;
-			bytes -= dlen;
-			if (!bytes)
-				continue;
-
-			lbo += dlen;
-			flags |= FIEMAP_EXTENT_UNWRITTEN;
-		}
-
-		if (vbo + bytes >= end)
-			flags |= FIEMAP_EXTENT_LAST;
-
-		err = fiemap_fill_next_extent(fieinfo, vbo, lbo, bytes, flags);
-		if (err < 0)
-			break;
-		if (err == 1) {
-			err = 0;
-			break;
-		}
-
-		vbo += bytes;
-	}
-
-out:
-	run_close(&run);
-	return err;
-}
-
 static struct page *ntfs_lock_new_page(struct address_space *mapping,
-		pgoff_t index, gfp_t gfp)
+				       pgoff_t index, gfp_t gfp)
 {
-	struct folio *folio = __filemap_get_folio(mapping, index,
-			FGP_LOCK | FGP_ACCESSED | FGP_CREAT, gfp);
+	struct folio *folio = __filemap_get_folio(
+		mapping, index, FGP_LOCK | FGP_ACCESSED | FGP_CREAT, gfp);
 	struct page *page;
 
 	if (IS_ERR(folio))
@@ -2046,18 +1876,18 @@ static struct page *ntfs_lock_new_page(struct address_space *mapping,
 }
 
 /*
- * ni_readpage_cmpr
+ * ni_read_folio_cmpr
  *
  * When decompressing, we typically obtain more than one page per reference.
  * We inject the additional pages into the page cache.
  */
-int ni_readpage_cmpr(struct ntfs_inode *ni, struct folio *folio)
+int ni_read_folio_cmpr(struct ntfs_inode *ni, struct folio *folio)
 {
 	int err;
 	struct ntfs_sb_info *sbi = ni->mi.sbi;
 	struct address_space *mapping = folio->mapping;
-	pgoff_t index = folio->index;
-	u64 frame_vbo, vbo = (u64)index << PAGE_SHIFT;
+	pgoff_t index;
+	u64 frame_vbo, vbo = folio_pos(folio);
 	struct page **pages = NULL; /* Array of at most 16 pages. stack? */
 	u8 frame_bits;
 	CLST frame;
@@ -2107,7 +1937,9 @@ int ni_readpage_cmpr(struct ntfs_inode *ni, struct folio *folio)
 		pages[i] = pg;
 	}
 
+	ni_lock(ni);
 	err = ni_read_frame(ni, frame_vbo, pages, pages_per_frame, 0);
+	ni_unlock(ni);
 
 out1:
 	for (i = 0; i < pages_per_frame; i++) {
@@ -2184,7 +2016,8 @@ int ni_decompress_file(struct ntfs_inode *ni)
 
 		for (vcn = vbo >> sbi->cluster_bits; vcn < end; vcn += clen) {
 			err = attr_data_get_block(ni, vcn, cend - vcn, &lcn,
-						  &clen, &new, false);
+						  &clen, &new, false, NULL,
+						  false);
 			if (err)
 				goto out;
 		}
@@ -2405,7 +2238,7 @@ int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
 	struct runs_tree *run = &ni->file.run;
 	u64 valid_size = ni->i_valid;
 	u64 vbo_disk;
-	size_t unc_size;
+	size_t unc_size = 0;
 	u32 frame_size, i, ondisk_size;
 	struct page *pg;
 	struct ATTRIB *attr;
@@ -3002,6 +2835,134 @@ bool ni_is_dirty(struct inode *inode)
 }
 
 /*
+ * ni_seek_data_or_hole
+ *
+ * Helper function for ntfs_llseek( SEEK_DATA/SEEK_HOLE )
+ */
+loff_t ni_seek_data_or_hole(struct ntfs_inode *ni, loff_t offset, bool data)
+{
+	int err;
+	u8 cluster_bits = ni->mi.sbi->cluster_bits;
+	CLST vcn, lcn, clen;
+	loff_t vbo;
+
+	/* Enumerate all fragments. */
+	for (vcn = offset >> cluster_bits;; vcn += clen) {
+		err = attr_data_get_block(ni, vcn, 1, &lcn, &clen, NULL, false,
+					  NULL, false);
+		if (err) {
+			return err;
+		}
+
+		if (lcn == RESIDENT_LCN) {
+			/* clen - resident size in bytes. clen == ni->vfs_inode.i_size */
+			if (offset >= clen) {
+				/* check eof. */
+				return -ENXIO;
+			}
+
+			if (data) {
+				return offset;
+			}
+
+			return clen;
+		}
+
+		if (lcn == EOF_LCN) {
+			if (data) {
+				return -ENXIO;
+			}
+
+			/* implicit hole at the end of file. */
+			return ni->vfs_inode.i_size;
+		}
+
+		if (data) {
+			/*
+			 * Adjust the file offset to the next location in the file greater than
+			 * or equal to offset containing data. If offset points to data, then
+			 * the file offset is set to offset.
+			 */
+			if (lcn != SPARSE_LCN) {
+				vbo = (u64)vcn << cluster_bits;
+				return max(vbo, offset);
+			}
+		} else {
+			/*
+			 * Adjust the file offset to the next hole in the file greater than or
+			 * equal to offset. If offset points into the middle of a hole, then the
+			 * file offset is set to offset. If there is no hole past offset, then the
+			 * file offset is adjusted to the end of the file
+			 * (i.e., there is an implicit hole at the end of any file).
+			 */
+			if (lcn == SPARSE_LCN &&
+			    /* native compression hole begins at aligned vcn. */
+			    (!(ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) ||
+			     !(vcn & (NTFS_LZNT_CLUSTERS - 1)))) {
+				vbo = (u64)vcn << cluster_bits;
+				return max(vbo, offset);
+			}
+		}
+
+		if (!clen) {
+			/* Corrupted file. */
+			return -EINVAL;
+		}
+	}
+}
+
+/*
+ * ni_write_parents
+ *
+ * Helper function for ntfs_file_fsync.
+ */
+int ni_write_parents(struct ntfs_inode *ni, int sync)
+{
+	int err = 0;
+	struct ATTRIB *attr = NULL;
+	struct ATTR_LIST_ENTRY *le = NULL;
+	struct ntfs_sb_info *sbi = ni->mi.sbi;
+	struct super_block *sb = sbi->sb;
+
+	while ((attr = ni_find_attr(ni, attr, &le, ATTR_NAME, NULL, 0, NULL,
+				    NULL))) {
+		struct inode *dir;
+		struct ATTR_FILE_NAME *fname;
+
+		fname = resident_data_ex(attr, SIZEOF_ATTRIBUTE_FILENAME);
+		if (!fname)
+			continue;
+
+		/* Check simple case when parent inode equals current inode. */
+		if (ino_get(&fname->home) == ni->vfs_inode.i_ino) {
+			if (MFT_REC_ROOT != ni->vfs_inode.i_ino) {
+				ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
+				err = -EINVAL;
+			}
+			continue;
+		}
+
+		dir = ntfs_iget5(sb, &fname->home, NULL);
+		if (IS_ERR(dir)) {
+			ntfs_inode_warn(
+				&ni->vfs_inode,
+				"failed to open parent directory r=%lx to write",
+				(long)ino_get(&fname->home));
+			continue;
+		}
+
+		if (!is_bad_inode(dir)) {
+			int err2 = write_inode_now(dir, sync);
+			if (!err)
+				err = err2;
+		}
+		iput(dir);
+	}
+
+	return err;
+}
+
+/*
  * ni_update_parent
  *
  * Update duplicate info of ATTR_FILE_NAME in MFT and in parent directories.
@@ -3277,3 +3238,62 @@ out:
 
 	return 0;
 }
+
+/*
+ * Force to allocate all delay allocated clusters.
+ */
+int ni_allocate_da_blocks(struct ntfs_inode *ni)
+{
+	int err;
+
+	ni_lock(ni);
+	down_write(&ni->file.run_lock);
+
+	err = ni_allocate_da_blocks_locked(ni);
+
+	up_write(&ni->file.run_lock);
+	ni_unlock(ni);
+
+	return err;
+}
+
+/*
+ * Force to allocate all delay allocated clusters.
+ */
+int ni_allocate_da_blocks_locked(struct ntfs_inode *ni)
+{
+	int err;
+
+	if (!ni->file.run_da.count)
+		return 0;
+
+	if (is_sparsed(ni)) {
+		CLST vcn, lcn, clen, alen;
+		bool new;
+
+		/*
+		 * Sparse file allocates clusters in 'attr_data_get_block_locked'
+		 */
+		while (run_get_entry(&ni->file.run_da, 0, &vcn, &lcn, &clen)) {
+			/* TODO: zero=true? */
+			err = attr_data_get_block_locked(ni, vcn, clen, &lcn,
+							 &alen, &new, true,
+							 NULL, true);
+			if (err)
+				break;
+			if (!new) {
+				err = -EINVAL;
+				break;
+			}
+		}
+	} else {
+		/*
+		 * Normal file allocates clusters in 'attr_set_size'
+		 */
+		err = attr_set_size_ex(ni, ATTR_DATA, NULL, 0, &ni->file.run,
+				       ni->vfs_inode.i_size, &ni->i_valid,
+				       false, NULL, true);
+	}
+
+	return err;
+}
diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c
index 38934e6978ec..10863c83c315 100644
--- a/fs/ntfs3/fslog.c
+++ b/fs/ntfs3/fslog.c
@@ -1074,6 +1074,8 @@ struct ntfs_log {
 	u32 client_undo_commit;
 
 	struct restart_info rst_info, rst_info2;
+
+	struct file_ra_state read_ahead;
 };
 
 static inline u32 lsn_to_vbo(struct ntfs_log *log, const u64 lsn)
@@ -1164,8 +1166,8 @@ static int read_log_page(struct ntfs_log *log, u32 vbo,
 
 	page_buf = page_off ? log->one_page_buf : *buffer;
 
-	err = ntfs_read_run_nb(ni->mi.sbi, &ni->file.run, page_vbo, page_buf,
-			       log->page_size, NULL);
+	err = ntfs_read_run_nb_ra(ni->mi.sbi, &ni->file.run, page_vbo, page_buf,
+				  log->page_size, NULL, &log->read_ahead);
 	if (err)
 		goto out;
 
@@ -3029,6 +3031,26 @@ static struct ATTRIB *attr_create_nonres_log(struct ntfs_sb_info *sbi,
 }
 
 /*
+ * update_oa_attr - Synchronize OpenAttr's attribute pointer with modified attribute
+ * @oa2: OpenAttr structure in memory that needs to be updated
+ * @attr: Modified attribute from MFT record to duplicate
+ *
+ * Returns true on success, false on allocation failure.
+ */
+static bool update_oa_attr(struct OpenAttr *oa2, struct ATTRIB *attr)
+{
+	void *p2;
+
+	p2 = kmemdup(attr, le32_to_cpu(attr->size), GFP_NOFS);
+	if (p2) {
+		kfree(oa2->attr);
+		oa2->attr = p2;
+		return true;
+	}
+	return false;
+}
+
+/*
  * do_action - Common routine for the Redo and Undo Passes.
  * @rlsn: If it is NULL then undo.
  */
@@ -3251,15 +3273,8 @@ skip_load_parent:
 			le16_add_cpu(&rec->hard_links, 1);
 
 		oa2 = find_loaded_attr(log, attr, rno_base);
-		if (oa2) {
-			void *p2 = kmemdup(attr, le32_to_cpu(attr->size),
-					   GFP_NOFS);
-			if (p2) {
-				// run_close(oa2->run1);
-				kfree(oa2->attr);
-				oa2->attr = p2;
-			}
-		}
+		if (oa2)
+			update_oa_attr(oa2, attr);
 
 		mi->dirty = true;
 		break;
@@ -3318,16 +3333,8 @@ move_data:
 			memmove(Add2Ptr(attr, aoff), data, dlen);
 
 		oa2 = find_loaded_attr(log, attr, rno_base);
-		if (oa2) {
-			void *p2 = kmemdup(attr, le32_to_cpu(attr->size),
-					   GFP_NOFS);
-			if (p2) {
-				// run_close(&oa2->run0);
-				oa2->run1 = &oa2->run0;
-				kfree(oa2->attr);
-				oa2->attr = p2;
-			}
-		}
+		if (oa2 && update_oa_attr(oa2, attr))
+			oa2->run1 = &oa2->run0;
 
 		mi->dirty = true;
 		break;
@@ -3377,14 +3384,9 @@ move_data:
 			attr->nres.total_size = new_sz->total_size;
 
 		oa2 = find_loaded_attr(log, attr, rno_base);
-		if (oa2) {
-			void *p2 = kmemdup(attr, le32_to_cpu(attr->size),
-					   GFP_NOFS);
-			if (p2) {
-				kfree(oa2->attr);
-				oa2->attr = p2;
-			}
-		}
+		if (oa2)
+			update_oa_attr(oa2, attr);
+
 		mi->dirty = true;
 		break;
 
@@ -3429,6 +3431,9 @@ move_data:
 
 		e1 = Add2Ptr(attr, le16_to_cpu(lrh->attr_off));
 		esize = le16_to_cpu(e1->size);
+		if (PtrOffset(e1, Add2Ptr(hdr, used)) < esize)
+			goto dirty_vol;
+
 		e2 = Add2Ptr(e1, esize);
 
 		memmove(e1, e2, PtrOffset(e2, Add2Ptr(hdr, used)));
@@ -5128,7 +5133,7 @@ commit_undo:
 
 undo_action_done:
 
-	ntfs_update_mftmirr(sbi, 0);
+	ntfs_update_mftmirr(sbi);
 
 	sbi->flags &= ~NTFS_FLAGS_NEED_REPLAY;
 
diff --git a/fs/ntfs3/fsntfs.c b/fs/ntfs3/fsntfs.c
index bd67ba7b5015..0df2aa81d884 100644
--- a/fs/ntfs3/fsntfs.c
+++ b/fs/ntfs3/fsntfs.c
@@ -445,36 +445,59 @@ up_write:
 }
 
 /*
- * ntfs_check_for_free_space
+ * ntfs_check_free_space
  *
  * Check if it is possible to allocate 'clen' clusters and 'mlen' Mft records
  */
-bool ntfs_check_for_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen)
+bool ntfs_check_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen,
+			   bool da)
 {
 	size_t free, zlen, avail;
 	struct wnd_bitmap *wnd;
+	CLST da_clusters = ntfs_get_da(sbi);
 
 	wnd = &sbi->used.bitmap;
 	down_read_nested(&wnd->rw_lock, BITMAP_MUTEX_CLUSTERS);
 	free = wnd_zeroes(wnd);
+
+	if (free >= da_clusters) {
+		free -= da_clusters;
+	} else {
+		free = 0;
+	}
+
 	zlen = min_t(size_t, NTFS_MIN_MFT_ZONE, wnd_zone_len(wnd));
 	up_read(&wnd->rw_lock);
 
-	if (free < zlen + clen)
+	if (free < zlen + clen) {
 		return false;
+	}
 
 	avail = free - (zlen + clen);
 
-	wnd = &sbi->mft.bitmap;
-	down_read_nested(&wnd->rw_lock, BITMAP_MUTEX_MFT);
-	free = wnd_zeroes(wnd);
-	zlen = wnd_zone_len(wnd);
-	up_read(&wnd->rw_lock);
+	/* 
+	 * When delalloc is active then keep in mind some reserved space.
+	 * The worst case: 1 mft record per each ~500 clusters.
+	 */
+	if (da) {
+		/* 1 mft record per each 1024 clusters. */
+		mlen += da_clusters >> 10;
+	}
+
+	if (mlen || !avail) {
+		wnd = &sbi->mft.bitmap;
+		down_read_nested(&wnd->rw_lock, BITMAP_MUTEX_MFT);
+		free = wnd_zeroes(wnd);
+		zlen = wnd_zone_len(wnd);
+		up_read(&wnd->rw_lock);
 
-	if (free >= zlen + mlen)
-		return true;
+		if (free < zlen + mlen &&
+		    avail < bytes_to_cluster(sbi, mlen << sbi->record_bits)) {
+			return false;
+		}
+	}
 
-	return avail >= bytes_to_cluster(sbi, mlen << sbi->record_bits);
+	return true;
 }
 
 /*
@@ -509,8 +532,8 @@ static int ntfs_extend_mft(struct ntfs_sb_info *sbi)
 
 	/* Step 1: Resize $MFT::DATA. */
 	down_write(&ni->file.run_lock);
-	err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run,
-			    new_mft_bytes, NULL, false, &attr);
+	err = attr_set_size_ex(ni, ATTR_DATA, NULL, 0, &ni->file.run,
+			       new_mft_bytes, NULL, false, &attr, false);
 
 	if (err) {
 		up_write(&ni->file.run_lock);
@@ -525,7 +548,7 @@ static int ntfs_extend_mft(struct ntfs_sb_info *sbi)
 	new_bitmap_bytes = ntfs3_bitmap_size(new_mft_total);
 
 	err = attr_set_size(ni, ATTR_BITMAP, NULL, 0, &sbi->mft.bitmap.run,
-			    new_bitmap_bytes, &new_bitmap_bytes, true, NULL);
+			    new_bitmap_bytes, &new_bitmap_bytes, true);
 
 	/* Refresh MFT Zone if necessary. */
 	down_write_nested(&sbi->used.bitmap.rw_lock, BITMAP_MUTEX_CLUSTERS);
@@ -843,9 +866,8 @@ int ntfs_refresh_zone(struct ntfs_sb_info *sbi)
 /*
  * ntfs_update_mftmirr - Update $MFTMirr data.
  */
-void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait)
+void ntfs_update_mftmirr(struct ntfs_sb_info *sbi)
 {
-	int err;
 	struct super_block *sb = sbi->sb;
 	u32 blocksize, bytes;
 	sector_t block1, block2;
@@ -875,9 +897,7 @@ void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait)
 			return;
 		}
 
-		if (buffer_locked(bh2))
-			__wait_on_buffer(bh2);
-
+		wait_on_buffer(bh2);
 		lock_buffer(bh2);
 		memcpy(bh2->b_data, bh1->b_data, blocksize);
 		set_buffer_uptodate(bh2);
@@ -886,12 +906,7 @@ void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait)
 
 		put_bh(bh1);
 		bh1 = NULL;
-
-		err = wait ? sync_dirty_buffer(bh2) : 0;
-
 		put_bh(bh2);
-		if (err)
-			return;
 	}
 
 	sbi->flags &= ~NTFS_FLAGS_MFTMIRR;
@@ -1069,9 +1084,7 @@ int ntfs_sb_write(struct super_block *sb, u64 lbo, size_t bytes,
 				return -ENOMEM;
 		}
 
-		if (buffer_locked(bh))
-			__wait_on_buffer(bh);
-
+		wait_on_buffer(bh);
 		lock_buffer(bh);
 		if (buf) {
 			memcpy(bh->b_data + off, buf, op);
@@ -1168,11 +1181,13 @@ struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi,
 	return ntfs_bread(sb, lbo >> sb->s_blocksize_bits);
 }
 
-int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
-		     u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb)
+int ntfs_read_run_nb_ra(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+			u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb,
+			struct file_ra_state *ra)
 {
 	int err;
 	struct super_block *sb = sbi->sb;
+	struct address_space *mapping = sb->s_bdev->bd_mapping;
 	u32 blocksize = sb->s_blocksize;
 	u8 cluster_bits = sbi->cluster_bits;
 	u32 off = vbo & sbi->cluster_mask;
@@ -1212,10 +1227,22 @@ int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 		nb->bytes = bytes;
 	}
 
+	if (ra && !ra->ra_pages)
+		file_ra_state_init(ra, mapping);
+
 	for (;;) {
 		u32 len32 = len >= bytes ? bytes : len;
 		sector_t block = lbo >> sb->s_blocksize_bits;
 
+		if (ra) {
+			pgoff_t index = lbo >> PAGE_SHIFT;
+			if (!ra_has_index(ra, index)) {
+				page_cache_sync_readahead(mapping, ra, NULL,
+							  index, 1);
+				ra->prev_pos = (loff_t)index << PAGE_SHIFT;
+			}
+		}
+
 		do {
 			u32 op = blocksize - off;
 
@@ -1252,6 +1279,12 @@ int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 
 		} while (len32);
 
+		if (!run) {
+			err = -EINVAL;
+			goto out;
+		}
+
+		/* Get next fragment to read. */
 		vcn_next = vcn + clen;
 		if (!run_get_entry(run, ++idx, &vcn, &lcn, &clen) ||
 		    vcn != vcn_next) {
@@ -1286,11 +1319,11 @@ out:
  *
  * Return: < 0 if error, 0 if ok, -E_NTFS_FIXUP if need to update fixups.
  */
-int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
-		 struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
-		 struct ntfs_buffers *nb)
+int ntfs_read_bh_ra(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+		    u64 vbo, struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
+		    struct ntfs_buffers *nb, struct file_ra_state *ra)
 {
-	int err = ntfs_read_run_nb(sbi, run, vbo, rhdr, bytes, nb);
+	int err = ntfs_read_run_nb_ra(sbi, run, vbo, rhdr, bytes, nb, ra);
 
 	if (err)
 		return err;
@@ -1347,12 +1380,9 @@ int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
 					err = -ENOMEM;
 					goto out;
 				}
-				if (buffer_locked(bh))
-					__wait_on_buffer(bh);
-
+				wait_on_buffer(bh);
 				lock_buffer(bh);
-				if (!buffer_uptodate(bh))
-				{
+				if (!buffer_uptodate(bh)) {
 					memset(bh->b_data, 0, blocksize);
 					set_buffer_uptodate(bh);
 				}
@@ -1427,9 +1457,7 @@ int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
 		if (op > bytes)
 			op = bytes;
 
-		if (buffer_locked(bh))
-			__wait_on_buffer(bh);
-
+		wait_on_buffer(bh);
 		lock_buffer(bh);
 
 		bh_data = bh->b_data + off;
@@ -2186,7 +2214,7 @@ int ntfs_insert_security(struct ntfs_sb_info *sbi,
 	if (new_sds_size > ni->vfs_inode.i_size) {
 		err = attr_set_size(ni, ATTR_DATA, SDS_NAME,
 				    ARRAY_SIZE(SDS_NAME), &ni->file.run,
-				    new_sds_size, &new_sds_size, false, NULL);
+				    new_sds_size, &new_sds_size, false);
 		if (err)
 			goto out;
 	}
diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index 7157cfd70fdc..2416c61050f1 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -252,9 +252,7 @@ static int bmp_buf_get(struct ntfs_index *indx, struct ntfs_inode *ni,
 
 	bbuf->bh = bh;
 
-	if (buffer_locked(bh))
-		__wait_on_buffer(bh);
-
+	wait_on_buffer(bh);
 	lock_buffer(bh);
 
 	sb = sbi->sb;
@@ -1028,17 +1026,18 @@ static int indx_write(struct ntfs_index *indx, struct ntfs_inode *ni,
 }
 
 /*
- * indx_read
+ * indx_read_ra
  *
  * If ntfs_readdir calls this function
  * inode is shared locked and no ni_lock.
  * Use rw_semaphore for read/write access to alloc_run.
  */
-int indx_read(struct ntfs_index *indx, struct ntfs_inode *ni, CLST vbn,
-	      struct indx_node **node)
+int indx_read_ra(struct ntfs_index *indx, struct ntfs_inode *ni, CLST vbn,
+		 struct indx_node **node, struct file_ra_state *ra)
 {
 	int err;
 	struct INDEX_BUFFER *ib;
+	struct ntfs_sb_info *sbi = ni->mi.sbi;
 	struct runs_tree *run = &indx->alloc_run;
 	struct rw_semaphore *lock = &indx->run_lock;
 	u64 vbo = (u64)vbn << indx->vbn2vbo_bits;
@@ -1064,7 +1063,7 @@ int indx_read(struct ntfs_index *indx, struct ntfs_inode *ni, CLST vbn,
 	}
 
 	down_read(lock);
-	err = ntfs_read_bh(ni->mi.sbi, run, vbo, &ib->rhdr, bytes, &in->nb);
+	err = ntfs_read_bh_ra(sbi, run, vbo, &ib->rhdr, bytes, &in->nb, ra);
 	up_read(lock);
 	if (!err)
 		goto ok;
@@ -1084,7 +1083,7 @@ int indx_read(struct ntfs_index *indx, struct ntfs_inode *ni, CLST vbn,
 		goto out;
 
 	down_read(lock);
-	err = ntfs_read_bh(ni->mi.sbi, run, vbo, &ib->rhdr, bytes, &in->nb);
+	err = ntfs_read_bh_ra(sbi, run, vbo, &ib->rhdr, bytes, &in->nb, ra);
 	up_read(lock);
 	if (err == -E_NTFS_FIXUP)
 		goto ok;
@@ -1100,7 +1099,7 @@ ok:
 	}
 
 	if (err == -E_NTFS_FIXUP) {
-		ntfs_write_bh(ni->mi.sbi, &ib->rhdr, &in->nb, 0);
+		ntfs_write_bh(sbi, &ib->rhdr, &in->nb, 0);
 		err = 0;
 	}
 
@@ -1190,7 +1189,12 @@ int indx_find(struct ntfs_index *indx, struct ntfs_inode *ni,
 			return -EINVAL;
 		}
 
-		fnd_push(fnd, node, e);
+		err = fnd_push(fnd, node, e);
+
+		if (err) {
+			put_indx_node(node);
+			return err;
+		}
 	}
 
 	*entry = e;
@@ -1442,8 +1446,8 @@ static int indx_create_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
 
 	run_init(&run);
 
-	err = attr_allocate_clusters(sbi, &run, 0, 0, len, NULL, ALLOCATE_DEF,
-				     &alen, 0, NULL, NULL);
+	err = attr_allocate_clusters(sbi, &run, NULL, 0, 0, len, NULL,
+				     ALLOCATE_DEF, &alen, 0, NULL, NULL);
 	if (err)
 		goto out;
 
@@ -1527,8 +1531,7 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
 		/* Increase bitmap. */
 		err = attr_set_size(ni, ATTR_BITMAP, in->name, in->name_len,
 				    &indx->bitmap_run,
-				    ntfs3_bitmap_size(bit + 1), NULL, true,
-				    NULL);
+				    ntfs3_bitmap_size(bit + 1), NULL, true);
 		if (err)
 			goto out1;
 	}
@@ -1549,8 +1552,7 @@ static int indx_add_allocate(struct ntfs_index *indx, struct ntfs_inode *ni,
 
 	/* Increase allocation. */
 	err = attr_set_size(ni, ATTR_ALLOC, in->name, in->name_len,
-			    &indx->alloc_run, data_size, &data_size, true,
-			    NULL);
+			    &indx->alloc_run, data_size, &data_size, true);
 	if (err) {
 		if (bmp)
 			goto out2;
@@ -1568,7 +1570,7 @@ out:
 out2:
 	/* Ops. No space? */
 	attr_set_size(ni, ATTR_BITMAP, in->name, in->name_len,
-		      &indx->bitmap_run, bmp_size, &bmp_size_v, false, NULL);
+		      &indx->bitmap_run, bmp_size, &bmp_size_v, false);
 
 out1:
 	return err;
@@ -1998,6 +2000,7 @@ int indx_insert_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 					      fnd->level - 1, fnd);
 	}
 
+	indx->version += 1;
 out:
 	fnd_put(fnd_a);
 out1:
@@ -2101,7 +2104,7 @@ static int indx_shrink(struct ntfs_index *indx, struct ntfs_inode *ni,
 	new_data = (u64)bit << indx->index_bits;
 
 	err = attr_set_size(ni, ATTR_ALLOC, in->name, in->name_len,
-			    &indx->alloc_run, new_data, &new_data, false, NULL);
+			    &indx->alloc_run, new_data, &new_data, false);
 	if (err)
 		return err;
 
@@ -2113,7 +2116,7 @@ static int indx_shrink(struct ntfs_index *indx, struct ntfs_inode *ni,
 		return 0;
 
 	err = attr_set_size(ni, ATTR_BITMAP, in->name, in->name_len,
-			    &indx->bitmap_run, bpb, &bpb, false, NULL);
+			    &indx->bitmap_run, bpb, &bpb, false);
 
 	return err;
 }
@@ -2328,6 +2331,7 @@ int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 		hdr = &root->ihdr;
 		e = fnd->root_de;
 		n = NULL;
+		ib = NULL;
 	}
 
 	e_size = le16_to_cpu(e->size);
@@ -2350,7 +2354,7 @@ int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 		 * Check to see if removing that entry made
 		 * the leaf empty.
 		 */
-		if (ib_is_leaf(ib) && ib_is_empty(ib)) {
+		if (ib && ib_is_leaf(ib) && ib_is_empty(ib)) {
 			fnd_pop(fnd);
 			fnd_push(fnd2, n, e);
 		}
@@ -2598,7 +2602,7 @@ int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 		in = &s_index_names[indx->type];
 
 		err = attr_set_size(ni, ATTR_ALLOC, in->name, in->name_len,
-				    &indx->alloc_run, 0, NULL, false, NULL);
+				    &indx->alloc_run, 0, NULL, false);
 		if (in->name == I30_NAME)
 			i_size_write(&ni->vfs_inode, 0);
 
@@ -2607,7 +2611,7 @@ int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 		run_close(&indx->alloc_run);
 
 		err = attr_set_size(ni, ATTR_BITMAP, in->name, in->name_len,
-				    &indx->bitmap_run, 0, NULL, false, NULL);
+				    &indx->bitmap_run, 0, NULL, false);
 		err = ni_remove_attr(ni, ATTR_BITMAP, in->name, in->name_len,
 				     false, NULL);
 		run_close(&indx->bitmap_run);
@@ -2645,6 +2649,7 @@ int indx_delete_entry(struct ntfs_index *indx, struct ntfs_inode *ni,
 		mi->dirty = true;
 	}
 
+	indx->version += 1;
 out:
 	fnd_put(fnd2);
 out1:
diff --git a/fs/ntfs3/inode.c b/fs/ntfs3/inode.c
index edfb973e4e82..6e65066ebcc1 100644
--- a/fs/ntfs3/inode.c
+++ b/fs/ntfs3/inode.c
@@ -12,6 +12,7 @@
 #include <linux/nls.h>
 #include <linux/uio.h>
 #include <linux/writeback.h>
+#include <linux/iomap.h>
 
 #include "debug.h"
 #include "ntfs.h"
@@ -39,7 +40,7 @@ static struct inode *ntfs_read_mft(struct inode *inode,
 	u32 rp_fa = 0, asize, t32;
 	u16 roff, rsize, names = 0, links = 0;
 	const struct ATTR_FILE_NAME *fname = NULL;
-	const struct INDEX_ROOT *root;
+	const struct INDEX_ROOT *root = NULL;
 	struct REPARSE_DATA_BUFFER rp; // 0x18 bytes
 	u64 t64;
 	struct MFT_REC *rec;
@@ -166,9 +167,7 @@ next_attr:
 
 		std5 = Add2Ptr(attr, roff);
 
-#ifdef STATX_BTIME
 		nt2kernel(std5->cr_time, &ni->i_crtime);
-#endif
 		nt2kernel(std5->a_time, &ts);
 		inode_set_atime_to_ts(inode, ts);
 		nt2kernel(std5->c_time, &ts);
@@ -555,194 +554,148 @@ struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
 	return inode;
 }
 
-enum get_block_ctx {
-	GET_BLOCK_GENERAL = 0,
-	GET_BLOCK_WRITE_BEGIN = 1,
-	GET_BLOCK_DIRECT_IO_R = 2,
-	GET_BLOCK_DIRECT_IO_W = 3,
-	GET_BLOCK_BMAP = 4,
-};
-
-static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
-				       struct buffer_head *bh, int create,
-				       enum get_block_ctx ctx)
+static sector_t ntfs_bmap(struct address_space *mapping, sector_t block)
 {
-	struct super_block *sb = inode->i_sb;
-	struct ntfs_sb_info *sbi = sb->s_fs_info;
+	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
-	struct folio *folio = bh->b_folio;
-	u8 cluster_bits = sbi->cluster_bits;
-	u32 block_size = sb->s_blocksize;
-	u64 bytes, lbo, valid;
-	u32 off;
-	int err;
-	CLST vcn, lcn, len;
-	bool new;
-
-	/* Clear previous state. */
-	clear_buffer_new(bh);
-	clear_buffer_uptodate(bh);
-
-	if (is_resident(ni)) {
-		bh->b_blocknr = RESIDENT_LCN;
-		bh->b_size = block_size;
-		if (!folio) {
-			/* direct io (read) or bmap call */
-			err = 0;
-		} else {
-			ni_lock(ni);
-			err = attr_data_read_resident(ni, folio);
-			ni_unlock(ni);
-
-			if (!err)
-				set_buffer_uptodate(bh);
-		}
-		return err;
-	}
 
-	vcn = vbo >> cluster_bits;
-	off = vbo & sbi->cluster_mask;
-	new = false;
-
-	err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL,
-				  create && sbi->cluster_size > PAGE_SIZE);
-	if (err)
-		goto out;
-
-	if (!len)
+	/*
+	 * We can get here for an inline file via the FIBMAP ioctl
+	 */
+	if (is_resident(ni))
 		return 0;
 
-	bytes = ((u64)len << cluster_bits) - off;
-
-	if (lcn >= sbi->used.bitmap.nbits) {
-		/* This case includes resident/compressed/sparse. */
-		if (!create) {
-			if (bh->b_size > bytes)
-				bh->b_size = bytes;
-			return 0;
-		}
-		WARN_ON(1);
-	}
-
-	if (new)
-		set_buffer_new(bh);
-
-	lbo = ((u64)lcn << cluster_bits) + off;
-
-	set_buffer_mapped(bh);
-	bh->b_bdev = sb->s_bdev;
-	bh->b_blocknr = lbo >> sb->s_blocksize_bits;
-
-	valid = ni->i_valid;
-
-	if (ctx == GET_BLOCK_DIRECT_IO_W) {
-		/* ntfs_direct_IO will update ni->i_valid. */
-		if (vbo >= valid)
-			set_buffer_new(bh);
-	} else if (create) {
-		/* Normal write. */
-		if (bytes > bh->b_size)
-			bytes = bh->b_size;
-
-		if (vbo >= valid)
-			set_buffer_new(bh);
-
-		if (vbo + bytes > valid) {
-			ni->i_valid = vbo + bytes;
-			mark_inode_dirty(inode);
-		}
-	} else if (vbo >= valid) {
-		/* Read out of valid data. */
-		clear_buffer_mapped(bh);
-	} else if (vbo + bytes <= valid) {
-		/* Normal read. */
-	} else if (vbo + block_size <= valid) {
-		/* Normal short read. */
-		bytes = block_size;
-	} else {
+	if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY) &&
+	    !run_is_empty(&ni->file.run_da)) {
 		/*
-		 * Read across valid size: vbo < valid && valid < vbo + block_size
+		 * With delalloc data we want to sync the file so
+		 * that we can make sure we allocate blocks for file and data
+		 * is in place for the user to see it
 		 */
-		bytes = block_size;
-
-		if (folio) {
-			u32 voff = valid - vbo;
+		ni_allocate_da_blocks(ni);
+	}
 
-			bh->b_size = block_size;
-			off = vbo & (PAGE_SIZE - 1);
-			folio_set_bh(bh, folio, off);
+	return iomap_bmap(mapping, block, &ntfs_iomap_ops);
+}
 
-			if (bh_read(bh, 0) < 0) {
-				err = -EIO;
-				goto out;
-			}
-			folio_zero_segment(folio, off + voff, off + block_size);
+static void ntfs_iomap_read_end_io(struct bio *bio)
+{
+	int error = blk_status_to_errno(bio->bi_status);
+	struct folio_iter fi;
+
+	bio_for_each_folio_all(fi, bio) {
+		struct folio *folio = fi.folio;
+		struct inode *inode = folio->mapping->host;
+		struct ntfs_inode *ni = ntfs_i(inode);
+		u64 valid = ni->i_valid;
+		u32 f_size = folio_size(folio);
+		loff_t f_pos = folio_pos(folio);
+
+
+		if (valid < f_pos + f_size) {
+			u32 z_from = valid <= f_pos ?
+					     0 :
+					     offset_in_folio(folio, valid);
+			/* The only thing ntfs_iomap_read_end_io used for. */
+			folio_zero_segment(folio, z_from, f_size);
 		}
-	}
 
-	if (bh->b_size > bytes)
-		bh->b_size = bytes;
-
-#ifndef __LP64__
-	if (ctx == GET_BLOCK_DIRECT_IO_W || ctx == GET_BLOCK_DIRECT_IO_R) {
-		static_assert(sizeof(size_t) < sizeof(loff_t));
-		if (bytes > 0x40000000u)
-			bh->b_size = 0x40000000u;
+		iomap_finish_folio_read(folio, fi.offset, fi.length, error);
 	}
-#endif
-
-	return 0;
-
-out:
-	return err;
+	bio_put(bio);
 }
 
-int ntfs_get_block(struct inode *inode, sector_t vbn,
-		   struct buffer_head *bh_result, int create)
+/*
+ * Copied from iomap/bio.c.
+ */
+static int ntfs_iomap_bio_read_folio_range(const struct iomap_iter *iter,
+					   struct iomap_read_folio_ctx *ctx,
+					   size_t plen)
 {
-	return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits,
-				  bh_result, create, GET_BLOCK_GENERAL);
+	struct folio *folio = ctx->cur_folio;
+	const struct iomap *iomap = &iter->iomap;
+	loff_t pos = iter->pos;
+	size_t poff = offset_in_folio(folio, pos);
+	loff_t length = iomap_length(iter);
+	sector_t sector;
+	struct bio *bio = ctx->read_ctx;
+
+	sector = iomap_sector(iomap, pos);
+	if (!bio || bio_end_sector(bio) != sector ||
+	    !bio_add_folio(bio, folio, plen, poff)) {
+		gfp_t gfp = mapping_gfp_constraint(folio->mapping, GFP_KERNEL);
+		gfp_t orig_gfp = gfp;
+		unsigned int nr_vecs = DIV_ROUND_UP(length, PAGE_SIZE);
+
+		if (bio)
+			submit_bio(bio);
+
+		if (ctx->rac) /* same as readahead_gfp_mask */
+			gfp |= __GFP_NORETRY | __GFP_NOWARN;
+		bio = bio_alloc(iomap->bdev, bio_max_segs(nr_vecs), REQ_OP_READ,
+				gfp);
+		/*
+		 * If the bio_alloc fails, try it again for a single page to
+		 * avoid having to deal with partial page reads.  This emulates
+		 * what do_mpage_read_folio does.
+		 */
+		if (!bio)
+			bio = bio_alloc(iomap->bdev, 1, REQ_OP_READ, orig_gfp);
+		if (ctx->rac)
+			bio->bi_opf |= REQ_RAHEAD;
+		bio->bi_iter.bi_sector = sector;
+		bio->bi_end_io = ntfs_iomap_read_end_io;
+		bio_add_folio_nofail(bio, folio, plen, poff);
+		ctx->read_ctx = bio;
+	}
+	return 0;
 }
 
-static int ntfs_get_block_bmap(struct inode *inode, sector_t vsn,
-			       struct buffer_head *bh_result, int create)
+static void ntfs_iomap_bio_submit_read(struct iomap_read_folio_ctx *ctx)
 {
-	return ntfs_get_block_vbo(inode,
-				  (u64)vsn << inode->i_sb->s_blocksize_bits,
-				  bh_result, create, GET_BLOCK_BMAP);
-}
+	struct bio *bio = ctx->read_ctx;
 
-static sector_t ntfs_bmap(struct address_space *mapping, sector_t block)
-{
-	return generic_block_bmap(mapping, block, ntfs_get_block_bmap);
+	if (bio)
+		submit_bio(bio);
 }
 
+static const struct iomap_read_ops ntfs_iomap_bio_read_ops = {
+	.read_folio_range = ntfs_iomap_bio_read_folio_range,
+	.submit_read = ntfs_iomap_bio_submit_read,
+};
+
 static int ntfs_read_folio(struct file *file, struct folio *folio)
 {
 	int err;
 	struct address_space *mapping = folio->mapping;
 	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
+	loff_t vbo = folio_pos(folio);
+	struct iomap_read_folio_ctx ctx = {
+		.cur_folio = folio,
+		.ops = &ntfs_iomap_bio_read_ops,
+	};
 
-	if (is_resident(ni)) {
-		ni_lock(ni);
-		err = attr_data_read_resident(ni, folio);
-		ni_unlock(ni);
-		if (err != E_NTFS_NONRESIDENT) {
-			folio_unlock(folio);
-			return err;
-		}
+	if (unlikely(is_bad_ni(ni))) {
+		folio_unlock(folio);
+		return -EIO;
+	}
+
+	if (ni->i_valid <= vbo) {
+		folio_zero_range(folio, 0, folio_size(folio));
+		folio_mark_uptodate(folio);
+		folio_unlock(folio);
+		return 0;
 	}
 
 	if (is_compressed(ni)) {
-		ni_lock(ni);
-		err = ni_readpage_cmpr(ni, folio);
-		ni_unlock(ni);
+		/* ni_lock is taken inside ni_read_folio_cmpr after page locks */
+		err = ni_read_folio_cmpr(ni, folio);
 		return err;
 	}
 
-	/* Normal + sparse files. */
-	return mpage_read_folio(folio, ntfs_get_block);
+	iomap_read_folio(&ntfs_iomap_ops, &ctx, NULL);
+	return 0;
 }
 
 static void ntfs_readahead(struct readahead_control *rac)
@@ -750,8 +703,10 @@ static void ntfs_readahead(struct readahead_control *rac)
 	struct address_space *mapping = rac->mapping;
 	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
-	u64 valid;
-	loff_t pos;
+	struct iomap_read_folio_ctx ctx = {
+		.ops = &ntfs_iomap_bio_read_ops,
+		.rac = rac,
+	};
 
 	if (is_resident(ni)) {
 		/* No readahead for resident. */
@@ -763,115 +718,324 @@ static void ntfs_readahead(struct readahead_control *rac)
 		return;
 	}
 
-	valid = ni->i_valid;
-	pos = readahead_pos(rac);
+	iomap_readahead(&ntfs_iomap_ops, &ctx, NULL);
+}
 
-	if (valid < i_size_read(inode) && pos <= valid &&
-	    valid < pos + readahead_length(rac)) {
-		/* Range cross 'valid'. Read it page by page. */
-		return;
+int ntfs_set_size(struct inode *inode, u64 new_size)
+{
+	struct super_block *sb = inode->i_sb;
+	struct ntfs_sb_info *sbi = sb->s_fs_info;
+	struct ntfs_inode *ni = ntfs_i(inode);
+	int err;
+
+	/* Check for maximum file size. */
+	if (is_sparsed(ni) || is_compressed(ni)) {
+		if (new_size > sbi->maxbytes_sparse) {
+			return -EFBIG;
+		}
+	} else if (new_size > sbi->maxbytes) {
+		return -EFBIG;
 	}
 
-	mpage_readahead(rac, ntfs_get_block);
-}
+	ni_lock(ni);
+	down_write(&ni->file.run_lock);
 
-static int ntfs_get_block_direct_IO_R(struct inode *inode, sector_t iblock,
-				      struct buffer_head *bh_result, int create)
-{
-	return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits,
-				  bh_result, create, GET_BLOCK_DIRECT_IO_R);
-}
+	err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
+			    &ni->i_valid, true);
 
-static int ntfs_get_block_direct_IO_W(struct inode *inode, sector_t iblock,
-				      struct buffer_head *bh_result, int create)
-{
-	return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits,
-				  bh_result, create, GET_BLOCK_DIRECT_IO_W);
+	if (!err) {
+		i_size_write(inode, new_size);
+		mark_inode_dirty(inode);
+	}
+
+	up_write(&ni->file.run_lock);
+	ni_unlock(ni);
+
+	return err;
 }
 
-static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
+/*
+ * Special value to detect ntfs_writeback_range call
+ */
+#define WB_NO_DA (struct iomap *)1
+/*
+ * Function to get mapping vbo -> lbo.
+ * used with:
+ * - iomap_zero_range
+ * - iomap_truncate_page
+ * - iomap_dio_rw
+ * - iomap_file_buffered_write
+ * - iomap_bmap
+ * - iomap_fiemap
+ * - iomap_bio_read_folio
+ * - iomap_bio_readahead
+ */
+static int ntfs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
+			    unsigned int flags, struct iomap *iomap,
+			    struct iomap *srcmap)
 {
-	struct file *file = iocb->ki_filp;
-	struct address_space *mapping = file->f_mapping;
-	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
-	loff_t vbo = iocb->ki_pos;
-	loff_t end;
-	int wr = iov_iter_rw(iter) & WRITE;
-	size_t iter_count = iov_iter_count(iter);
-	loff_t valid;
-	ssize_t ret;
+	struct ntfs_sb_info *sbi = ni->mi.sbi;
+	u8 cluster_bits = sbi->cluster_bits;
+	CLST vcn = offset >> cluster_bits;
+	u32 off = offset & sbi->cluster_mask;
+	bool rw = flags & IOMAP_WRITE;
+	loff_t endbyte = offset + length;
+	void *res = NULL;
+	int err;
+	CLST lcn, clen, clen_max = 1;
+	bool new_clst = false;
+	bool no_da;
+	bool zero = false;
+	if (unlikely(ntfs3_forced_shutdown(sbi->sb)))
+		return -EIO;
 
-	if (is_resident(ni)) {
-		/* Switch to buffered write. */
-		ret = 0;
-		goto out;
+	if (flags & IOMAP_REPORT) {
+		if (offset > ntfs_get_maxbytes(ni)) {
+			/* called from fiemap/bmap. */
+			return -EINVAL;
+		}
+
+		if (offset >= inode->i_size) {
+			/* special code for report. */
+			return -ENOENT;
+		}
 	}
-	if (is_compressed(ni)) {
-		ret = 0;
-		goto out;
+
+	if (IOMAP_ZERO == flags && (endbyte & sbi->cluster_mask)) {
+		rw = true;
+	} else if (rw) {
+		clen_max = bytes_to_cluster(sbi, endbyte) - vcn;
 	}
 
-	ret = blockdev_direct_IO(iocb, inode, iter,
-				 wr ? ntfs_get_block_direct_IO_W :
-				      ntfs_get_block_direct_IO_R);
+	/* 
+	 * Force to allocate clusters if directIO(write) or writeback_range.
+	 * NOTE: attr_data_get_block allocates clusters only for sparse file.
+	 * Normal file allocates clusters in attr_set_size.
+	*/
+	no_da = flags == (IOMAP_DIRECT | IOMAP_WRITE) || srcmap == WB_NO_DA;
 
-	if (ret > 0)
-		end = vbo + ret;
-	else if (wr && ret == -EIOCBQUEUED)
-		end = vbo + iter_count;
-	else
-		goto out;
+	err = attr_data_get_block(ni, vcn, clen_max, &lcn, &clen,
+				  rw ? &new_clst : NULL, zero, &res, no_da);
 
-	valid = ni->i_valid;
-	if (wr) {
-		if (end > valid && !S_ISBLK(inode->i_mode)) {
-			ni->i_valid = end;
-			mark_inode_dirty(inode);
+	if (err) {
+		return err;
+	}
+
+	if (lcn == EOF_LCN) {
+		/* request out of file. */
+		if (flags & IOMAP_REPORT) {
+			/* special code for report. */
+			return -ENOENT;
+		}
+
+		if (rw) {
+			/* should never be here. */
+			return -EINVAL;
 		}
-	} else if (vbo < valid && valid < end) {
-		/* Fix page. */
-		iov_iter_revert(iter, end - valid);
-		iov_iter_zero(end - valid, iter);
+		lcn = SPARSE_LCN;
 	}
 
-out:
-	return ret;
+	iomap->flags = new_clst ? IOMAP_F_NEW : 0;
+
+	if (lcn == RESIDENT_LCN) {
+		if (offset >= clen) {
+			kfree(res);
+			if (flags & IOMAP_REPORT) {
+				/* special code for report. */
+				return -ENOENT;
+			}
+			return -EFAULT;
+		}
+
+		iomap->private = iomap->inline_data = res;
+		iomap->type = IOMAP_INLINE;
+		iomap->offset = 0;
+		iomap->length = clen; /* resident size in bytes. */
+		return 0;
+	}
+
+	if (!clen) {
+		/* broken file? */
+		return -EINVAL;
+	}
+
+	iomap->bdev = inode->i_sb->s_bdev;
+	iomap->offset = offset;
+	iomap->length = ((loff_t)clen << cluster_bits) - off;
+
+	if (lcn == COMPRESSED_LCN) {
+		/* should never be here. */
+		return -EOPNOTSUPP;
+	}
+
+	if (lcn == DELALLOC_LCN) {
+		iomap->type = IOMAP_DELALLOC;
+		iomap->addr = IOMAP_NULL_ADDR;
+	} else {
+
+		/* Translate clusters into bytes. */
+		iomap->addr = ((loff_t)lcn << cluster_bits) + off;
+		if (length && iomap->length > length)
+			iomap->length = length;
+		else
+			endbyte = offset + iomap->length;
+
+		if (lcn == SPARSE_LCN) {
+			iomap->addr = IOMAP_NULL_ADDR;
+			iomap->type = IOMAP_HOLE;
+			//			if (IOMAP_ZERO == flags && !off) {
+			//				iomap->length = (endbyte - offset) &
+			//						sbi->cluster_mask_inv;
+			//			}
+		} else if (endbyte <= ni->i_valid) {
+			iomap->type = IOMAP_MAPPED;
+		} else if (offset < ni->i_valid) {
+			iomap->type = IOMAP_MAPPED;
+			if (flags & IOMAP_REPORT)
+				iomap->length = ni->i_valid - offset;
+		} else if (rw || (flags & IOMAP_ZERO)) {
+			iomap->type = IOMAP_MAPPED;
+		} else {
+			iomap->type = IOMAP_UNWRITTEN;
+		}
+	}
+
+	if ((flags & IOMAP_ZERO) &&
+	    (iomap->type == IOMAP_MAPPED || iomap->type == IOMAP_DELALLOC)) {
+		/* Avoid too large requests. */
+		u32 tail;
+		u32 off_a = offset & (PAGE_SIZE - 1);
+		if (off_a)
+			tail = PAGE_SIZE - off_a;
+		else
+			tail = PAGE_SIZE;
+
+		if (iomap->length > tail)
+			iomap->length = tail;
+	}
+
+	return 0;
 }
 
-int ntfs_set_size(struct inode *inode, u64 new_size)
+static int ntfs_iomap_end(struct inode *inode, loff_t pos, loff_t length,
+			  ssize_t written, unsigned int flags,
+			  struct iomap *iomap)
 {
-	struct super_block *sb = inode->i_sb;
-	struct ntfs_sb_info *sbi = sb->s_fs_info;
+	int err = 0;
 	struct ntfs_inode *ni = ntfs_i(inode);
-	int err;
+	loff_t endbyte = pos + written;
 
-	/* Check for maximum file size. */
-	if (is_sparsed(ni) || is_compressed(ni)) {
-		if (new_size > sbi->maxbytes_sparse) {
-			err = -EFBIG;
-			goto out;
-		}
-	} else if (new_size > sbi->maxbytes) {
-		err = -EFBIG;
-		goto out;
-	}
+	if ((flags & IOMAP_WRITE) || (flags & IOMAP_ZERO)) {
+		if (iomap->type == IOMAP_INLINE) {
+			u32 data_size;
+			struct ATTRIB *attr;
+			struct mft_inode *mi;
 
-	ni_lock(ni);
-	down_write(&ni->file.run_lock);
+			attr = ni_find_attr(ni, NULL, NULL, ATTR_DATA, NULL, 0,
+					    NULL, &mi);
+			if (!attr || attr->non_res) {
+				err = -EINVAL;
+				goto out;
+			}
 
-	err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
-			    &ni->i_valid, true, NULL);
+			data_size = le32_to_cpu(attr->res.data_size);
+			if (!(pos < data_size && endbyte <= data_size)) {
+				err = -EINVAL;
+				goto out;
+			}
 
-	up_write(&ni->file.run_lock);
-	ni_unlock(ni);
+			/* Update resident data. */
+			memcpy(resident_data(attr) + pos,
+			       iomap_inline_data(iomap, pos), written);
+			mi->dirty = true;
+			ni->i_valid = data_size;
+		} else if (ni->i_valid < endbyte) {
+			ni->i_valid = endbyte;
+			mark_inode_dirty(inode);
+		}
+	}
 
-	mark_inode_dirty(inode);
+	if ((flags & IOMAP_ZERO) &&
+	    (iomap->type == IOMAP_MAPPED || iomap->type == IOMAP_DELALLOC)) {
+		/* Pair for code in ntfs_iomap_begin. */
+		balance_dirty_pages_ratelimited(inode->i_mapping);
+		cond_resched();
+	}
 
 out:
+	if (iomap->type == IOMAP_INLINE) {
+		kfree(iomap->private);
+		iomap->private = NULL;
+	}
+
 	return err;
 }
 
+/*
+ * write_begin + put_folio + write_end.
+ * iomap_zero_range
+ * iomap_truncate_page
+ * iomap_file_buffered_write
+ */
+static void ntfs_iomap_put_folio(struct inode *inode, loff_t pos,
+				 unsigned int len, struct folio *folio)
+{
+	struct ntfs_inode *ni = ntfs_i(inode);
+	loff_t end = pos + len;
+	u32 f_size = folio_size(folio);
+	loff_t f_pos = folio_pos(folio);
+	loff_t f_end = f_pos + f_size;
+
+	if (ni->i_valid <= end && end < f_end) {
+		/* zero range [end - f_end). */
+		/* The only thing ntfs_iomap_put_folio used for. */
+		folio_zero_segment(folio, offset_in_folio(folio, end), f_size);
+	}
+	folio_unlock(folio);
+	folio_put(folio);
+}
+
+/*
+ * iomap_writeback_ops::writeback_range
+ */
+static ssize_t ntfs_writeback_range(struct iomap_writepage_ctx *wpc,
+				    struct folio *folio, u64 offset,
+				    unsigned int len, u64 end_pos)
+{
+	struct iomap *iomap = &wpc->iomap;
+	/* Check iomap position. */
+	if (iomap->offset + iomap->length <= offset || offset < iomap->offset) {
+		int err;
+		struct inode *inode = wpc->inode;
+		struct ntfs_inode *ni = ntfs_i(inode);
+		struct ntfs_sb_info *sbi = ntfs_sb(inode->i_sb);
+		loff_t i_size_up = ntfs_up_cluster(sbi, inode->i_size);
+		loff_t len_max = i_size_up - offset;
+
+		err = ni->file.run_da.count ? ni_allocate_da_blocks(ni) : 0;
+
+		if (!err) {
+			/* Use local special value 'WB_NO_DA' to disable delalloc. */
+			err = ntfs_iomap_begin(inode, offset, len_max,
+					       IOMAP_WRITE, iomap, WB_NO_DA);
+		}
+
+		if (err) {
+			ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
+			return err;
+		}
+	}
+
+	return iomap_add_to_ioend(wpc, folio, offset, end_pos, len);
+}
+
+
+static const struct iomap_writeback_ops ntfs_writeback_ops = {
+	.writeback_range = ntfs_writeback_range,
+	.writeback_submit = iomap_ioend_writeback_submit,
+};
+
 static int ntfs_resident_writepage(struct folio *folio,
 				   struct writeback_control *wbc)
 {
@@ -900,39 +1064,14 @@ static int ntfs_resident_writepage(struct folio *folio,
 static int ntfs_writepages(struct address_space *mapping,
 			   struct writeback_control *wbc)
 {
-	struct inode *inode = mapping->host;
-
-	/* Avoid any operation if inode is bad. */
-	if (unlikely(is_bad_ni(ntfs_i(inode))))
-		return -EINVAL;
-
-	if (unlikely(ntfs3_forced_shutdown(inode->i_sb)))
-		return -EIO;
-
-	if (is_resident(ntfs_i(inode))) {
-		struct folio *folio = NULL;
-		int error;
-
-		while ((folio = writeback_iter(mapping, wbc, folio, &error)))
-			error = ntfs_resident_writepage(folio, wbc);
-		return error;
-	}
-	return mpage_writepages(mapping, wbc, ntfs_get_block);
-}
-
-static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn,
-				      struct buffer_head *bh_result, int create)
-{
-	return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits,
-				  bh_result, create, GET_BLOCK_WRITE_BEGIN);
-}
-
-int ntfs_write_begin(const struct kiocb *iocb, struct address_space *mapping,
-		     loff_t pos, u32 len, struct folio **foliop, void **fsdata)
-{
 	int err;
 	struct inode *inode = mapping->host;
 	struct ntfs_inode *ni = ntfs_i(inode);
+	struct iomap_writepage_ctx wpc = {
+		.inode = mapping->host,
+		.wbc = wbc,
+		.ops = &ntfs_writeback_ops,
+	};
 
 	/* Avoid any operation if inode is bad. */
 	if (unlikely(is_bad_ni(ni)))
@@ -942,100 +1081,15 @@ int ntfs_write_begin(const struct kiocb *iocb, struct address_space *mapping,
 		return -EIO;
 
 	if (is_resident(ni)) {
-		struct folio *folio = __filemap_get_folio(
-			mapping, pos >> PAGE_SHIFT, FGP_WRITEBEGIN,
-			mapping_gfp_mask(mapping));
-
-		if (IS_ERR(folio)) {
-			err = PTR_ERR(folio);
-			goto out;
-		}
-
-		ni_lock(ni);
-		err = attr_data_read_resident(ni, folio);
-		ni_unlock(ni);
-
-		if (!err) {
-			*foliop = folio;
-			goto out;
-		}
-		folio_unlock(folio);
-		folio_put(folio);
-
-		if (err != E_NTFS_NONRESIDENT)
-			goto out;
-	}
-
-	err = block_write_begin(mapping, pos, len, foliop,
-				ntfs_get_block_write_begin);
-
-out:
-	return err;
-}
-
-/*
- * ntfs_write_end - Address_space_operations::write_end.
- */
-int ntfs_write_end(const struct kiocb *iocb, struct address_space *mapping,
-		   loff_t pos, u32 len, u32 copied, struct folio *folio,
-		   void *fsdata)
-{
-	struct inode *inode = mapping->host;
-	struct ntfs_inode *ni = ntfs_i(inode);
-	u64 valid = ni->i_valid;
-	bool dirty = false;
-	int err;
-
-	if (is_resident(ni)) {
-		ni_lock(ni);
-		err = attr_data_write_resident(ni, folio);
-		ni_unlock(ni);
-		if (!err) {
-			struct buffer_head *head = folio_buffers(folio);
-			dirty = true;
-			/* Clear any buffers in folio. */
-			if (head) {
-				struct buffer_head *bh = head;
-
-				do {
-					clear_buffer_dirty(bh);
-					clear_buffer_mapped(bh);
-					set_buffer_uptodate(bh);
-				} while (head != (bh = bh->b_this_page));
-			}
-			folio_mark_uptodate(folio);
-			err = copied;
-		}
-		folio_unlock(folio);
-		folio_put(folio);
-	} else {
-		err = generic_write_end(iocb, mapping, pos, len, copied, folio,
-					fsdata);
-	}
-
-	if (err >= 0) {
-		if (!(ni->std_fa & FILE_ATTRIBUTE_ARCHIVE)) {
-			inode_set_mtime_to_ts(inode,
-					      inode_set_ctime_current(inode));
-			ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
-			dirty = true;
-		}
-
-		if (valid != ni->i_valid) {
-			/* ni->i_valid is changed in ntfs_get_block_vbo. */
-			dirty = true;
-		}
+		struct folio *folio = NULL;
 
-		if (pos + err > inode->i_size) {
-			i_size_write(inode, pos + err);
-			dirty = true;
-		}
+		while ((folio = writeback_iter(mapping, wbc, folio, &err)))
+			err = ntfs_resident_writepage(folio, wbc);
 
-		if (dirty)
-			mark_inode_dirty(inode);
+		return err;
 	}
 
-	return err;
+	return iomap_writepages(&wpc);
 }
 
 int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc)
@@ -1050,6 +1104,7 @@ int ntfs_sync_inode(struct inode *inode)
 
 /*
  * Helper function to read file.
+ * Used to read $AttrDef and $UpCase
  */
 int inode_read_data(struct inode *inode, void *data, size_t bytes)
 {
@@ -1539,9 +1594,10 @@ int ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
 			attr->nres.alloc_size =
 				cpu_to_le64(ntfs_up_cluster(sbi, nsize));
 
-			err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0,
-						     clst, NULL, ALLOCATE_DEF,
-						     &alen, 0, NULL, NULL);
+			err = attr_allocate_clusters(sbi, &ni->file.run, NULL,
+						     0, 0, clst, NULL,
+						     ALLOCATE_DEF, &alen, 0,
+						     NULL, NULL);
 			if (err)
 				goto out5;
 
@@ -1682,7 +1738,7 @@ out6:
 		/* Delete ATTR_EA, if non-resident. */
 		struct runs_tree run;
 		run_init(&run);
-		attr_set_size(ni, ATTR_EA, NULL, 0, &run, 0, NULL, false, NULL);
+		attr_set_size(ni, ATTR_EA, NULL, 0, &run, 0, NULL, false);
 		run_close(&run);
 	}
 
@@ -2094,18 +2150,26 @@ const struct address_space_operations ntfs_aops = {
 	.read_folio	= ntfs_read_folio,
 	.readahead	= ntfs_readahead,
 	.writepages	= ntfs_writepages,
-	.write_begin	= ntfs_write_begin,
-	.write_end	= ntfs_write_end,
-	.direct_IO	= ntfs_direct_IO,
 	.bmap		= ntfs_bmap,
-	.dirty_folio	= block_dirty_folio,
-	.migrate_folio	= buffer_migrate_folio,
-	.invalidate_folio = block_invalidate_folio,
+	.dirty_folio	= iomap_dirty_folio,
+	.migrate_folio	= filemap_migrate_folio,
+	.release_folio	= iomap_release_folio,
+	.invalidate_folio = iomap_invalidate_folio,
 };
 
 const struct address_space_operations ntfs_aops_cmpr = {
 	.read_folio	= ntfs_read_folio,
-	.dirty_folio	= block_dirty_folio,
-	.direct_IO	= ntfs_direct_IO,
+	.dirty_folio	= iomap_dirty_folio,
+	.release_folio	= iomap_release_folio,
+	.invalidate_folio = iomap_invalidate_folio,
+};
+
+const struct iomap_ops ntfs_iomap_ops = {
+	.iomap_begin	= ntfs_iomap_begin,
+	.iomap_end	= ntfs_iomap_end,
+};
+
+const struct iomap_write_ops ntfs_iomap_folio_ops = {
+	.put_folio = ntfs_iomap_put_folio,
 };
 // clang-format on
diff --git a/fs/ntfs3/ntfs.h b/fs/ntfs3/ntfs.h
index 552b97905813..892f13e65d42 100644
--- a/fs/ntfs3/ntfs.h
+++ b/fs/ntfs3/ntfs.h
@@ -77,10 +77,14 @@ static_assert(sizeof(size_t) == 8);
 typedef u32 CLST;
 #endif
 
+/* On-disk sparsed cluster is marked as -1. */
 #define SPARSE_LCN64   ((u64)-1)
 #define SPARSE_LCN     ((CLST)-1)
+/* Below is virtual (not on-disk) values. */
 #define RESIDENT_LCN   ((CLST)-2)
 #define COMPRESSED_LCN ((CLST)-3)
+#define EOF_LCN       ((CLST)-4)
+#define DELALLOC_LCN   ((CLST)-5)
 
 enum RECORD_NUM {
 	MFT_REC_MFT		= 0,
diff --git a/fs/ntfs3/ntfs_fs.h b/fs/ntfs3/ntfs_fs.h
index f18349689458..921b526eb0f4 100644
--- a/fs/ntfs3/ntfs_fs.h
+++ b/fs/ntfs3/ntfs_fs.h
@@ -109,6 +109,7 @@ struct ntfs_mount_options {
 	unsigned force : 1; /* RW mount dirty volume. */
 	unsigned prealloc : 1; /* Preallocate space when file is growing. */
 	unsigned nocase : 1; /* case insensitive. */
+	unsigned delalloc : 1; /* delay allocation. */
 };
 
 /* Special value to unpack and deallocate. */
@@ -133,7 +134,8 @@ struct ntfs_buffers {
 enum ALLOCATE_OPT {
 	ALLOCATE_DEF = 0, // Allocate all clusters.
 	ALLOCATE_MFT = 1, // Allocate for MFT.
-	ALLOCATE_ZERO = 2, // Zeroout new allocated clusters
+	ALLOCATE_ZERO = 2, // Zeroout new allocated clusters.
+	ALLOCATE_ONE_FR = 4, // Allocate one fragment only.
 };
 
 enum bitmap_mutex_classes {
@@ -192,6 +194,7 @@ struct ntfs_index {
 	struct runs_tree alloc_run;
 	/* read/write access to 'bitmap_run'/'alloc_run' while ntfs_readdir */
 	struct rw_semaphore run_lock;
+	size_t version; /* increment each change */
 
 	/*TODO: Remove 'cmp'. */
 	NTFS_CMP_FUNC cmp;
@@ -213,7 +216,7 @@ struct ntfs_sb_info {
 
 	u32 discard_granularity;
 	u64 discard_granularity_mask_inv; // ~(discard_granularity_mask_inv-1)
-	u32 bdev_blocksize_mask; // bdev_logical_block_size(bdev) - 1;
+	u32 bdev_blocksize; // bdev_logical_block_size(bdev)
 
 	u32 cluster_size; // bytes per cluster
 	u32 cluster_mask; // == cluster_size - 1
@@ -272,6 +275,12 @@ struct ntfs_sb_info {
 	struct {
 		struct wnd_bitmap bitmap; // $Bitmap::Data
 		CLST next_free_lcn;
+		/* Total sum of delay allocated clusters in all files. */
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+		atomic64_t da;
+#else
+		atomic_t da;
+#endif
 	} used;
 
 	struct {
@@ -379,7 +388,7 @@ struct ntfs_inode {
 	 */
 	u8 mi_loaded;
 
-	/* 
+	/*
 	 * Use this field to avoid any write(s).
 	 * If inode is bad during initialization - use make_bad_inode
 	 * If inode is bad during operations - use this field
@@ -390,7 +399,14 @@ struct ntfs_inode {
 		struct ntfs_index dir;
 		struct {
 			struct rw_semaphore run_lock;
+			/* Unpacked runs from just one record. */
 			struct runs_tree run;
+			/* 
+			 * Pairs [vcn, len] for all delay allocated clusters.
+			 * Normal file always contains delayed clusters in one fragment.
+			 * TODO: use 2 CLST per pair instead of 3.
+			 */
+			struct runs_tree run_da;
 #ifdef CONFIG_NTFS3_LZX_XPRESS
 			struct folio *offs_folio;
 #endif
@@ -430,20 +446,32 @@ enum REPARSE_SIGN {
 
 /* Functions from attrib.c */
 int attr_allocate_clusters(struct ntfs_sb_info *sbi, struct runs_tree *run,
-			   CLST vcn, CLST lcn, CLST len, CLST *pre_alloc,
-			   enum ALLOCATE_OPT opt, CLST *alen, const size_t fr,
-			   CLST *new_lcn, CLST *new_len);
+			   struct runs_tree *run_da, CLST vcn, CLST lcn,
+			   CLST len, CLST *pre_alloc, enum ALLOCATE_OPT opt,
+			   CLST *alen, const size_t fr, CLST *new_lcn,
+			   CLST *new_len);
 int attr_make_nonresident(struct ntfs_inode *ni, struct ATTRIB *attr,
 			  struct ATTR_LIST_ENTRY *le, struct mft_inode *mi,
 			  u64 new_size, struct runs_tree *run,
 			  struct ATTRIB **ins_attr, struct page *page);
-int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
-		  const __le16 *name, u8 name_len, struct runs_tree *run,
-		  u64 new_size, const u64 *new_valid, bool keep_prealloc,
-		  struct ATTRIB **ret);
+int attr_set_size_ex(struct ntfs_inode *ni, enum ATTR_TYPE type,
+		     const __le16 *name, u8 name_len, struct runs_tree *run,
+		     u64 new_size, const u64 *new_valid, bool keep_prealloc,
+		     struct ATTRIB **ret, bool no_da);
+static inline int attr_set_size(struct ntfs_inode *ni, enum ATTR_TYPE type,
+				const __le16 *name, u8 name_len,
+				struct runs_tree *run, u64 new_size,
+				const u64 *new_valid, bool keep_prealloc)
+{
+	return attr_set_size_ex(ni, type, name, name_len, run, new_size,
+				new_valid, keep_prealloc, NULL, false);
+}
 int attr_data_get_block(struct ntfs_inode *ni, CLST vcn, CLST clen, CLST *lcn,
-			CLST *len, bool *new, bool zero);
-int attr_data_read_resident(struct ntfs_inode *ni, struct folio *folio);
+			CLST *len, bool *new, bool zero, void **res,
+			bool no_da);
+int attr_data_get_block_locked(struct ntfs_inode *ni, CLST vcn, CLST clen,
+			       CLST *lcn, CLST *len, bool *new, bool zero,
+			       void **res, bool no_da);
 int attr_data_write_resident(struct ntfs_inode *ni, struct folio *folio);
 int attr_load_runs_vcn(struct ntfs_inode *ni, enum ATTR_TYPE type,
 		       const __le16 *name, u8 name_len, struct runs_tree *run,
@@ -512,6 +540,7 @@ int ntfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
 int ntfs_file_open(struct inode *inode, struct file *file);
 int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		__u64 start, __u64 len);
+int ntfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync);
 long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg);
 long ntfs_compat_ioctl(struct file *filp, u32 cmd, unsigned long arg);
 extern const struct inode_operations ntfs_special_inode_operations;
@@ -567,9 +596,7 @@ enum REPARSE_SIGN ni_parse_reparse(struct ntfs_inode *ni, struct ATTRIB *attr,
 				   struct REPARSE_DATA_BUFFER *buffer);
 int ni_write_inode(struct inode *inode, int sync, const char *hint);
 #define _ni_write_inode(i, w) ni_write_inode(i, w, __func__)
-int ni_fiemap(struct ntfs_inode *ni, struct fiemap_extent_info *fieinfo,
-	      __u64 vbo, __u64 len);
-int ni_readpage_cmpr(struct ntfs_inode *ni, struct folio *folio);
+int ni_read_folio_cmpr(struct ntfs_inode *ni, struct folio *folio);
 int ni_decompress_file(struct ntfs_inode *ni);
 int ni_read_frame(struct ntfs_inode *ni, u64 frame_vbo, struct page **pages,
 		  u32 pages_per_frame, int copy);
@@ -590,6 +617,10 @@ int ni_rename(struct ntfs_inode *dir_ni, struct ntfs_inode *new_dir_ni,
 	      struct NTFS_DE *new_de);
 
 bool ni_is_dirty(struct inode *inode);
+loff_t ni_seek_data_or_hole(struct ntfs_inode *ni, loff_t offset, bool data);
+int ni_write_parents(struct ntfs_inode *ni, int sync);
+int ni_allocate_da_blocks(struct ntfs_inode *ni);
+int ni_allocate_da_blocks_locked(struct ntfs_inode *ni);
 
 /* Globals from fslog.c */
 bool check_index_header(const struct INDEX_HDR *hdr, size_t bytes);
@@ -605,13 +636,14 @@ int ntfs_loadlog_and_replay(struct ntfs_inode *ni, struct ntfs_sb_info *sbi);
 int ntfs_look_for_free_space(struct ntfs_sb_info *sbi, CLST lcn, CLST len,
 			     CLST *new_lcn, CLST *new_len,
 			     enum ALLOCATE_OPT opt);
-bool ntfs_check_for_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen);
+bool ntfs_check_free_space(struct ntfs_sb_info *sbi, CLST clen, CLST mlen,
+			   bool da);
 int ntfs_look_free_mft(struct ntfs_sb_info *sbi, CLST *rno, bool mft,
 		       struct ntfs_inode *ni, struct mft_inode **mi);
 void ntfs_mark_rec_free(struct ntfs_sb_info *sbi, CLST rno, bool is_mft);
 int ntfs_clear_mft_tail(struct ntfs_sb_info *sbi, size_t from, size_t to);
 int ntfs_refresh_zone(struct ntfs_sb_info *sbi);
-void ntfs_update_mftmirr(struct ntfs_sb_info *sbi, int wait);
+void ntfs_update_mftmirr(struct ntfs_sb_info *sbi);
 void ntfs_bad_inode(struct inode *inode, const char *hint);
 #define _ntfs_bad_inode(i) ntfs_bad_inode(i, __func__)
 enum NTFS_DIRTY_FLAGS {
@@ -626,11 +658,27 @@ int ntfs_sb_write_run(struct ntfs_sb_info *sbi, const struct runs_tree *run,
 		      u64 vbo, const void *buf, size_t bytes, int sync);
 struct buffer_head *ntfs_bread_run(struct ntfs_sb_info *sbi,
 				   const struct runs_tree *run, u64 vbo);
-int ntfs_read_run_nb(struct ntfs_sb_info *sbi, const struct runs_tree *run,
-		     u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb);
-int ntfs_read_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
-		 struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
-		 struct ntfs_buffers *nb);
+int ntfs_read_run_nb_ra(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+			u64 vbo, void *buf, u32 bytes, struct ntfs_buffers *nb,
+			struct file_ra_state *ra);
+static inline int ntfs_read_run_nb(struct ntfs_sb_info *sbi,
+				   const struct runs_tree *run, u64 vbo,
+				   void *buf, u32 bytes,
+				   struct ntfs_buffers *nb)
+{
+	return ntfs_read_run_nb_ra(sbi, run, vbo, buf, bytes, nb, NULL);
+}
+int ntfs_read_bh_ra(struct ntfs_sb_info *sbi, const struct runs_tree *run,
+		    u64 vbo, struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
+		    struct ntfs_buffers *nb, struct file_ra_state *ra);
+static inline int ntfs_read_bh(struct ntfs_sb_info *sbi,
+			       const struct runs_tree *run, u64 vbo,
+			       struct NTFS_RECORD_HEADER *rhdr, u32 bytes,
+			       struct ntfs_buffers *nb)
+{
+	return ntfs_read_bh_ra(sbi, run, vbo, rhdr, bytes, nb, NULL);
+}
+
 int ntfs_get_bh(struct ntfs_sb_info *sbi, const struct runs_tree *run, u64 vbo,
 		u32 bytes, struct ntfs_buffers *nb);
 int ntfs_write_bh(struct ntfs_sb_info *sbi, struct NTFS_RECORD_HEADER *rhdr,
@@ -696,8 +744,13 @@ int indx_init(struct ntfs_index *indx, struct ntfs_sb_info *sbi,
 	      const struct ATTRIB *attr, enum index_mutex_classed type);
 struct INDEX_ROOT *indx_get_root(struct ntfs_index *indx, struct ntfs_inode *ni,
 				 struct ATTRIB **attr, struct mft_inode **mi);
-int indx_read(struct ntfs_index *idx, struct ntfs_inode *ni, CLST vbn,
-	      struct indx_node **node);
+int indx_read_ra(struct ntfs_index *idx, struct ntfs_inode *ni, CLST vbn,
+		 struct indx_node **node, struct file_ra_state *ra);
+static inline int indx_read(struct ntfs_index *idx, struct ntfs_inode *ni,
+			    CLST vbn, struct indx_node **node)
+{
+	return indx_read_ra(idx, ni, vbn, node, NULL);
+}
 int indx_find(struct ntfs_index *indx, struct ntfs_inode *dir,
 	      const struct INDEX_ROOT *root, const void *Key, size_t KeyLen,
 	      const void *param, int *diff, struct NTFS_DE **entry,
@@ -721,13 +774,6 @@ int indx_update_dup(struct ntfs_inode *ni, struct ntfs_sb_info *sbi,
 struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
 			 const struct cpu_str *name);
 int ntfs_set_size(struct inode *inode, u64 new_size);
-int ntfs_get_block(struct inode *inode, sector_t vbn,
-		   struct buffer_head *bh_result, int create);
-int ntfs_write_begin(const struct kiocb *iocb, struct address_space *mapping,
-		     loff_t pos, u32 len, struct folio **foliop, void **fsdata);
-int ntfs_write_end(const struct kiocb *iocb, struct address_space *mapping,
-		   loff_t pos, u32 len, u32 copied, struct folio *folio,
-		   void *fsdata);
 int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc);
 int ntfs_sync_inode(struct inode *inode);
 int inode_read_data(struct inode *inode, void *data, size_t bytes);
@@ -738,6 +784,8 @@ int ntfs_create_inode(struct mnt_idmap *idmap, struct inode *dir,
 int ntfs_link_inode(struct inode *inode, struct dentry *dentry);
 int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry);
 void ntfs_evict_inode(struct inode *inode);
+extern const struct iomap_ops ntfs_iomap_ops;
+extern const struct iomap_write_ops ntfs_iomap_folio_ops;
 extern const struct inode_operations ntfs_link_inode_operations;
 extern const struct address_space_operations ntfs_aops;
 extern const struct address_space_operations ntfs_aops_cmpr;
@@ -815,7 +863,8 @@ void run_truncate_around(struct runs_tree *run, CLST vcn);
 bool run_add_entry(struct runs_tree *run, CLST vcn, CLST lcn, CLST len,
 		   bool is_mft);
 bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len, CLST sub);
-bool run_insert_range(struct runs_tree *run, CLST vcn, CLST len);
+int run_insert_range(struct runs_tree *run, CLST vcn, CLST len);
+int run_insert_range_da(struct runs_tree *run, CLST vcn, CLST len);
 bool run_get_entry(const struct runs_tree *run, size_t index, CLST *vcn,
 		   CLST *lcn, CLST *len);
 bool run_is_mapped_full(const struct runs_tree *run, CLST svcn, CLST evcn);
@@ -835,6 +884,9 @@ int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
 #endif
 int run_get_highest_vcn(CLST vcn, const u8 *run_buf, u64 *highest_vcn);
 int run_clone(const struct runs_tree *run, struct runs_tree *new_run);
+bool run_remove_range(struct runs_tree *run, CLST vcn, CLST len, CLST *done);
+CLST run_len(const struct runs_tree *run);
+CLST run_get_max_vcn(const struct runs_tree *run);
 
 /* Globals from super.c */
 void *ntfs_set_shared(void *ptr, u32 bytes);
@@ -1011,6 +1063,36 @@ static inline int ntfs3_forced_shutdown(struct super_block *sb)
 	return test_bit(NTFS_FLAGS_SHUTDOWN_BIT, &ntfs_sb(sb)->flags);
 }
 
+/* Returns total sum of delay allocated clusters in all files. */
+static inline CLST ntfs_get_da(struct ntfs_sb_info *sbi)
+{
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+	return atomic64_read(&sbi->used.da);
+#else
+	return atomic_read(&sbi->used.da);
+#endif
+}
+
+/* Update total count of delay allocated clusters. */
+static inline void ntfs_add_da(struct ntfs_sb_info *sbi, CLST da)
+{
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+	atomic64_add(da, &sbi->used.da);
+#else
+	atomic_add(da, &sbi->used.da);
+#endif
+}
+
+/* Update total count of delay allocated clusters. */
+static inline void ntfs_sub_da(struct ntfs_sb_info *sbi, CLST da)
+{
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+	atomic64_sub(da, &sbi->used.da);
+#else
+	atomic_sub(da, &sbi->used.da);
+#endif
+}
+
 /*
  * ntfs_up_cluster - Align up on cluster boundary.
  */
@@ -1084,6 +1166,13 @@ static inline int is_resident(struct ntfs_inode *ni)
 	return ni->ni_flags & NI_FLAG_RESIDENT;
 }
 
+static inline loff_t ntfs_get_maxbytes(struct ntfs_inode *ni)
+{
+	struct ntfs_sb_info *sbi = ni->mi.sbi;
+	return is_sparsed(ni) || is_compressed(ni) ? sbi->maxbytes_sparse :
+						     sbi->maxbytes;
+}
+
 static inline void le16_sub_cpu(__le16 *var, u16 val)
 {
 	*var = cpu_to_le16(le16_to_cpu(*var) - val);
diff --git a/fs/ntfs3/run.c b/fs/ntfs3/run.c
index 395b20492525..c0324cdc174d 100644
--- a/fs/ntfs3/run.c
+++ b/fs/ntfs3/run.c
@@ -454,7 +454,7 @@ requires_new_range:
 
 		/*
 		 * If existing range fits then were done.
-		 * Otherwise extend found one and fall back to range jocode.
+		 * Otherwise extend found one and fall back to range join code.
 		 */
 		if (r->vcn + r->len < vcn + len)
 			r->len += len - ((r->vcn + r->len) - vcn);
@@ -482,7 +482,8 @@ requires_new_range:
 	return true;
 }
 
-/* run_collapse_range
+/*
+ * run_collapse_range
  *
  * Helper for attr_collapse_range(),
  * which is helper for fallocate(collapse_range).
@@ -493,8 +494,9 @@ bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len, CLST sub)
 	struct ntfs_run *r, *e, *eat_start, *eat_end;
 	CLST end;
 
-	if (WARN_ON(!run_lookup(run, vcn, &index)))
-		return true; /* Should never be here. */
+	if (!run_lookup(run, vcn, &index) && index >= run->count) {
+		return true;
+	}
 
 	e = run->runs + run->count;
 	r = run->runs + index;
@@ -560,13 +562,13 @@ bool run_collapse_range(struct runs_tree *run, CLST vcn, CLST len, CLST sub)
  * Helper for attr_insert_range(),
  * which is helper for fallocate(insert_range).
  */
-bool run_insert_range(struct runs_tree *run, CLST vcn, CLST len)
+int run_insert_range(struct runs_tree *run, CLST vcn, CLST len)
 {
 	size_t index;
 	struct ntfs_run *r, *e;
 
 	if (WARN_ON(!run_lookup(run, vcn, &index)))
-		return false; /* Should never be here. */
+		return -EINVAL; /* Should never be here. */
 
 	e = run->runs + run->count;
 	r = run->runs + index;
@@ -588,13 +590,49 @@ bool run_insert_range(struct runs_tree *run, CLST vcn, CLST len)
 		r->len = len1;
 
 		if (!run_add_entry(run, vcn + len, lcn2, len2, false))
-			return false;
+			return -ENOMEM;
 	}
 
 	if (!run_add_entry(run, vcn, SPARSE_LCN, len, false))
-		return false;
+		return -ENOMEM;
 
-	return true;
+	return 0;
+}
+
+/* run_insert_range_da
+ *
+ * Helper for attr_insert_range(),
+ * which is helper for fallocate(insert_range).
+ */
+int run_insert_range_da(struct runs_tree *run, CLST vcn, CLST len)
+{
+	struct ntfs_run *r, *r0 = NULL, *e = run->runs + run->count;
+	;
+
+	for (r = run->runs; r < e; r++) {
+		CLST end = r->vcn + r->len;
+
+		if (vcn >= end)
+			continue;
+
+		if (!r0 && r->vcn < vcn) {
+			r0 = r;
+		} else {
+			r->vcn += len;
+		}
+	}
+
+	if (r0) {
+		/* split fragment. */
+		CLST len1 = vcn - r0->vcn;
+		CLST len2 = r0->len - len1;
+
+		r0->len = len1;
+		if (!run_add_entry(run, vcn + len, SPARSE_LCN, len2, false))
+			return -ENOMEM;
+	}
+
+	return 0;
 }
 
 /*
@@ -1131,11 +1169,14 @@ int run_unpack_ex(struct runs_tree *run, struct ntfs_sb_info *sbi, CLST ino,
 			struct rw_semaphore *lock =
 				is_mounted(sbi) ? &sbi->mft.ni->file.run_lock :
 						  NULL;
-			if (lock)
-				down_read(lock);
-			ntfs_refresh_zone(sbi);
-			if (lock)
-				up_read(lock);
+			if (lock) {
+				if (down_read_trylock(lock)) {
+					ntfs_refresh_zone(sbi);
+					up_read(lock);
+				}
+			} else {
+				ntfs_refresh_zone(sbi);
+			}
 		}
 		up_write(&wnd->rw_lock);
 		if (err)
@@ -1206,3 +1247,97 @@ int run_clone(const struct runs_tree *run, struct runs_tree *new_run)
 	new_run->count = run->count;
 	return 0;
 }
+
+/*
+ * run_remove_range
+ *
+ */
+bool run_remove_range(struct runs_tree *run, CLST vcn, CLST len, CLST *done)
+{
+	size_t index, eat;
+	struct ntfs_run *r, *e, *eat_start, *eat_end;
+	CLST end, d;
+
+	*done = 0;
+
+	/* Fast check. */
+	if (!run->count)
+		return true;
+
+	if (!run_lookup(run, vcn, &index) && index >= run->count) {
+		/* No entries in this run. */
+		return true;
+	}
+
+
+	e = run->runs + run->count;
+	r = run->runs + index;
+	end = vcn + len;
+
+	if (vcn > r->vcn) {
+		CLST r_end = r->vcn + r->len;
+		d = vcn - r->vcn;
+
+		if (r_end > end) {
+			/* Remove a middle part, split. */
+			*done += len;
+			r->len = d;
+			return run_add_entry(run, end, r->lcn, r_end - end,
+					     false);
+		}
+		/* Remove tail of run .*/
+		*done += r->len - d;
+		r->len = d;
+		r += 1;
+	}
+
+	eat_start = r;
+	eat_end = r;
+
+	for (; r < e; r++) {
+		if (r->vcn >= end)
+			continue;
+
+		if (r->vcn + r->len <= end) {
+			/* Eat this run. */
+			*done += r->len;
+			eat_end = r + 1;
+			continue;
+		}
+
+		d = end - r->vcn;
+		*done += d;
+		if (r->lcn != SPARSE_LCN)
+			r->lcn += d;
+		r->len -= d;
+		r->vcn = end;
+	}
+
+	eat = eat_end - eat_start;
+	memmove(eat_start, eat_end, (e - eat_end) * sizeof(*r));
+	run->count -= eat;
+
+	return true;
+}
+
+CLST run_len(const struct runs_tree *run)
+{
+	const struct ntfs_run *r, *e;
+	CLST len = 0;
+
+	for (r = run->runs, e = r + run->count; r < e; r++) {
+		len += r->len;
+	}
+
+	return len;
+}
+
+CLST run_get_max_vcn(const struct runs_tree *run)
+{
+	const struct ntfs_run *r;
+	if (!run->count)
+		return 0;
+
+	r = run->runs + run->count - 1;
+	return r->vcn + r->len;
+}
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index 8b0cf0ed4f72..27411203082a 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -58,9 +58,9 @@
 #include <linux/buffer_head.h>
 #include <linux/exportfs.h>
 #include <linux/fs.h>
-#include <linux/fs_struct.h>
 #include <linux/fs_context.h>
 #include <linux/fs_parser.h>
+#include <linux/fs_struct.h>
 #include <linux/log2.h>
 #include <linux/minmax.h>
 #include <linux/module.h>
@@ -264,9 +264,13 @@ enum Opt {
 	Opt_windows_names,
 	Opt_showmeta,
 	Opt_acl,
+	Opt_acl_bool,
 	Opt_iocharset,
 	Opt_prealloc,
+	Opt_prealloc_bool,
 	Opt_nocase,
+	Opt_delalloc,
+	Opt_delalloc_bool,
 	Opt_err,
 };
 
@@ -285,10 +289,14 @@ static const struct fs_parameter_spec ntfs_fs_parameters[] = {
 	fsparam_flag("hide_dot_files",	Opt_hide_dot_files),
 	fsparam_flag("windows_names",	Opt_windows_names),
 	fsparam_flag("showmeta",	Opt_showmeta),
-	fsparam_flag_no("acl",		Opt_acl),
+	fsparam_flag("acl",		Opt_acl),
+	fsparam_bool("acl",		Opt_acl_bool),
 	fsparam_string("iocharset",	Opt_iocharset),
-	fsparam_flag_no("prealloc",	Opt_prealloc),
+	fsparam_flag("prealloc",	Opt_prealloc),
+	fsparam_bool("prealloc",	Opt_prealloc_bool),
 	fsparam_flag("nocase",		Opt_nocase),
+	fsparam_flag("delalloc",	Opt_delalloc),
+	fsparam_bool("delalloc",	Opt_delalloc_bool),
 	{}
 };
 // clang-format on
@@ -379,15 +387,17 @@ static int ntfs_fs_parse_param(struct fs_context *fc,
 	case Opt_showmeta:
 		opts->showmeta = 1;
 		break;
-	case Opt_acl:
-		if (!result.negated)
+	case Opt_acl_bool:
+		if (result.boolean) {
+			fallthrough;
+		case Opt_acl:
 #ifdef CONFIG_NTFS3_FS_POSIX_ACL
 			fc->sb_flags |= SB_POSIXACL;
 #else
 			return invalf(
 				fc, "ntfs3: Support for ACL not compiled in!");
 #endif
-		else
+		} else
 			fc->sb_flags &= ~SB_POSIXACL;
 		break;
 	case Opt_iocharset:
@@ -396,11 +406,20 @@ static int ntfs_fs_parse_param(struct fs_context *fc,
 		param->string = NULL;
 		break;
 	case Opt_prealloc:
-		opts->prealloc = !result.negated;
+		opts->prealloc = 1;
+		break;
+	case Opt_prealloc_bool:
+		opts->prealloc = result.boolean;
 		break;
 	case Opt_nocase:
 		opts->nocase = 1;
 		break;
+	case Opt_delalloc:
+		opts->delalloc = 1;
+		break;
+	case Opt_delalloc_bool:
+		opts->delalloc = result.boolean;
+		break;
 	default:
 		/* Should not be here unless we forget add case. */
 		return -EINVAL;
@@ -674,7 +693,7 @@ static noinline void ntfs3_put_sbi(struct ntfs_sb_info *sbi)
 		sbi->volume.ni = NULL;
 	}
 
-	ntfs_update_mftmirr(sbi, 0);
+	ntfs_update_mftmirr(sbi);
 
 	indx_clear(&sbi->security.index_sii);
 	indx_clear(&sbi->security.index_sdh);
@@ -705,9 +724,7 @@ static void ntfs_put_super(struct super_block *sb)
 	ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
 
 	if (sbi->options) {
-		unload_nls(sbi->options->nls);
-		kfree(sbi->options->nls_name);
-		kfree(sbi->options);
+		put_mount_options(sbi->options);
 		sbi->options = NULL;
 	}
 
@@ -719,14 +736,22 @@ static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	struct super_block *sb = dentry->d_sb;
 	struct ntfs_sb_info *sbi = sb->s_fs_info;
 	struct wnd_bitmap *wnd = &sbi->used.bitmap;
+	CLST da_clusters = ntfs_get_da(sbi);
 
 	buf->f_type = sb->s_magic;
-	buf->f_bsize = sbi->cluster_size;
+	buf->f_bsize = buf->f_frsize = sbi->cluster_size;
 	buf->f_blocks = wnd->nbits;
 
-	buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd);
+	buf->f_bfree = wnd_zeroes(wnd);
+	if (buf->f_bfree > da_clusters) {
+		buf->f_bfree -= da_clusters;
+	} else {
+		buf->f_bfree = 0;
+	}
+	buf->f_bavail = buf->f_bfree;
+
 	buf->f_fsid.val[0] = sbi->volume.ser_num;
-	buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32);
+	buf->f_fsid.val[1] = sbi->volume.ser_num >> 32;
 	buf->f_namelen = NTFS_NAME_LEN;
 
 	return 0;
@@ -771,6 +796,8 @@ static int ntfs_show_options(struct seq_file *m, struct dentry *root)
 		seq_puts(m, ",prealloc");
 	if (opts->nocase)
 		seq_puts(m, ",nocase");
+	if (opts->delalloc)
+		seq_puts(m, ",delalloc");
 
 	return 0;
 }
@@ -823,7 +850,12 @@ static int ntfs_sync_fs(struct super_block *sb, int wait)
 	if (!err)
 		ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
 
-	ntfs_update_mftmirr(sbi, wait);
+	ntfs_update_mftmirr(sbi);
+
+	if (wait) {
+		sync_blockdev(sb->s_bdev);
+		blkdev_issue_flush(sb->s_bdev);
+	}
 
 	return err;
 }
@@ -1076,7 +1108,7 @@ read_boot:
 		dev_size += sector_size - 1;
 	}
 
-	sbi->bdev_blocksize_mask = max(boot_sector_size, sector_size) - 1;
+	sbi->bdev_blocksize = max(boot_sector_size, sector_size);
 	sbi->mft.lbo = mlcn << cluster_bits;
 	sbi->mft.lbo2 = mlcn2 << cluster_bits;
 
@@ -1253,7 +1285,6 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
 		}
 	}
 	sbi->options = options;
-	fc->fs_private = NULL;
 	sb->s_flags |= SB_NODIRATIME;
 	sb->s_magic = 0x7366746e; // "ntfs"
 	sb->s_op = &ntfs_sops;
@@ -1652,9 +1683,7 @@ load_root:
 		 */
 		struct buffer_head *bh0 = sb_getblk(sb, 0);
 		if (bh0) {
-			if (buffer_locked(bh0))
-				__wait_on_buffer(bh0);
-
+			wait_on_buffer(bh0);
 			lock_buffer(bh0);
 			memcpy(bh0->b_data, boot2, sizeof(*boot2));
 			set_buffer_uptodate(bh0);
@@ -1679,9 +1708,7 @@ put_inode_out:
 out:
 	/* sbi->options == options */
 	if (options) {
-		unload_nls(options->nls);
-		kfree(options->nls_name);
-		kfree(options);
+		put_mount_options(sbi->options);
 		sbi->options = NULL;
 	}
 
diff --git a/fs/ntfs3/xattr.c b/fs/ntfs3/xattr.c
index b96e6ac90e9f..3fffda784892 100644
--- a/fs/ntfs3/xattr.c
+++ b/fs/ntfs3/xattr.c
@@ -460,7 +460,7 @@ update_ea:
 
 	new_sz = size;
 	err = attr_set_size(ni, ATTR_EA, NULL, 0, &ea_run, new_sz, &new_sz,
-			    false, NULL);
+			    false);
 	if (err)
 		goto out;