[PATCH v9 08/17] ntfs: update file operations

Namjae Jeon
2026-02-13T08:29:03Z

Rewrite the file operations to utilize the iomap infrastructure,
replacing the legacy buffer-head based implementation.

Implement ntfs_setattr() with size change handling, uid/gid/mode.

Add support for Direct I/O.

Add support for fallocate with the FALLOC_FL_KEEP_SIZE,
FALLOC_FL_PUNCH_HOLE, FALLOC_FL_COLLAPSE_RANGE, FALLOC_FL_INSERT_RANGE
and FALLOC_FL_ALLOCATE_RANGE modes.

Implement .llseek with SEEK_DATA / SEEK_HOLE support.

Implement ntfs_fiemap() using iomap_fiemap().

Add FS_IOC_SHUTDOWN, FS_IOC_[GS]ETFSLABEL, FITRIM ioctl support.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Hyunchul Lee <hyc.lee@gmail.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
---
fs/ntfs/file.c | 2880 +++++++++++++++++-------------------------------
1 file changed, 1022 insertions(+), 1858 deletions(-)

diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 297c0b9db621..4b9126f9fe52 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -1,34 +1,31 @@
// SPDX-License-Identifier: GPL-2.0-or-later
/*
- * file.c - NTFS kernel file operations. Part of the Linux-NTFS project.
+ * NTFS kernel file operations.
*
* Copyright (c) 2001-2015 Anton Altaparmakov and Tuxera Inc.
+ * Copyright (c) 2025 LG Electronics Co., Ltd.
*/

+#include <linux/writeback.h>
#include <linux/blkdev.h>
-#include <linux/backing-dev.h>
-#include <linux/buffer_head.h>
-#include <linux/gfp.h>
-#include <linux/pagemap.h>
-#include <linux/pagevec.h>
-#include <linux/sched/signal.h>
-#include <linux/swap.h>
+#include <linux/fs.h>
+#include <linux/iomap.h>
#include <linux/uio.h>
-#include <linux/writeback.h>
+#include <linux/posix_acl.h>
+#include <linux/posix_acl_xattr.h>
+#include <linux/compat.h>
+#include <linux/falloc.h>

-#include <asm/page.h>
-#include <linux/uaccess.h>
-
-#include "attrib.h"
-#include "bitmap.h"
-#include "inode.h"
-#include "debug.h"
#include "lcnalloc.h"
-#include "malloc.h"
-#include "mft.h"
#include "ntfs.h"
+#include "reparse.h"
+#include "ea.h"
+#include "iomap.h"
+#include "bitmap.h"
+
+#include <linux/filelock.h>

-/**
+/*
* ntfs_file_open - called when an inode is about to be opened
* @vi: inode to be opened
* @filp: file structure describing the inode
@@ -48,1948 +45,1115 @@
*/
static int ntfs_file_open(struct inode *vi, struct file *filp)
{
+ struct ntfs_inode *ni = NTFS_I(vi);
+
+ if (NVolShutdown(ni->vol))
+ return -EIO;
+
if (sizeof(unsigned long) < 8) {
if (i_size_read(vi) > MAX_LFS_FILESIZE)
return -EOVERFLOW;
}
+
+ filp->f_mode |= FMODE_NOWAIT | FMODE_CAN_ODIRECT;
+
return generic_file_open(vi, filp);
}

-#ifdef NTFS_RW
-
-/**
- * ntfs_attr_extend_initialized - extend the initialized size of an attribute
- * @ni: ntfs inode of the attribute to extend
- * @new_init_size: requested new initialized size in bytes
- *
- * Extend the initialized size of an attribute described by the ntfs inode @ni
- * to @new_init_size bytes. This involves zeroing any non-sparse space between
- * the old initialized size and @new_init_size both in the page cache and on
- * disk (if relevant complete pages are already uptodate in the page cache then
- * these are simply marked dirty).
- *
- * As a side-effect, the file size (vfs inode->i_size) may be incremented as,
- * in the resident attribute case, it is tied to the initialized size and, in
- * the non-resident attribute case, it may not fall below the initialized size.
+/*
+ * Trim preallocated space on file release.
*
- * Note that if the attribute is resident, we do not need to touch the page
- * cache at all. This is because if the page cache page is not uptodate we
- * bring it uptodate later, when doing the write to the mft record since we
- * then already have the page mapped. And if the page is uptodate, the
- * non-initialized region will already have been zeroed when the page was
- * brought uptodate and the region may in fact already have been overwritten
- * with new data via mmap() based writes, so we cannot just zero it. And since
- * POSIX specifies that the behaviour of resizing a file whilst it is mmap()ped
- * is unspecified, we choose not to do zeroing and thus we do not need to touch
- * the page at all. For a more detailed explanation see ntfs_truncate() in
- * fs/ntfs/inode.c.
+ * When the preallo_size mount option is set (default 64KB), writes extend
+ * allocated_size and runlist in units of preallocated size to reduce
+ * runlist merge overhead for small writes. This can leave
+ * allocated_size > data_size if not all preallocated space is used.
*
- * Return 0 on success and -errno on error. In the case that an error is
- * encountered it is possible that the initialized size will already have been
- * incremented some way towards @new_init_size but it is guaranteed that if
- * this is the case, the necessary zeroing will also have happened and that all
- * metadata is self-consistent.
+ * We perform the trim here because ->release() is called only when
+ * the file is no longer open. At this point, no further writes can occur,
+ * so it is safe to reclaim the unused preallocated space.
*
- * Locking: i_mutex on the vfs inode corrseponsind to the ntfs inode @ni must be
- * held by the caller.
+ * Returns 0 on success, or negative error on failure.
*/
-static int ntfs_attr_extend_initialized(ntfs_inode *ni, const s64 new_init_size)
+static int ntfs_trim_prealloc(struct inode *vi)
{
- s64 old_init_size;
- loff_t old_i_size;
- pgoff_t index, end_index;
- unsigned long flags;
- struct inode *vi = VFS_I(ni);
- ntfs_inode *base_ni;
- MFT_RECORD *m = NULL;
- ATTR_RECORD *a;
- ntfs_attr_search_ctx *ctx = NULL;
- struct address_space *mapping;
- struct page *page = NULL;
- u8 *kattr;
- int err;
- u32 attr_len;
+ struct ntfs_inode *ni = NTFS_I(vi);
+ struct ntfs_volume *vol = ni->vol;
+ struct runlist_element *rl;
+ s64 aligned_data_size;
+ s64 vcn_ds, vcn_tr;
+ ssize_t rc;
+ int err = 0;

- read_lock_irqsave(&ni->size_lock, flags);
- old_init_size = ni->initialized_size;
- old_i_size = i_size_read(vi);
- BUG_ON(new_init_size > ni->allocated_size);
- read_unlock_irqrestore(&ni->size_lock, flags);
- ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, "
- "old_initialized_size 0x%llx, "
- "new_initialized_size 0x%llx, i_size 0x%llx.",
- vi->i_ino, (unsigned)le32_to_cpu(ni->type),
- (unsigned long long)old_init_size,
- (unsigned long long)new_init_size, old_i_size);
- if (!NInoAttr(ni))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- /* Use goto to reduce indentation and we need the label below anyway. */
- if (NInoNonResident(ni))
- goto do_non_resident_extend;
- BUG_ON(old_init_size != old_i_size);
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- m = NULL;
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto err_out;
- }
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto err_out;
- }
- m = ctx->mrec;
- a = ctx->attr;
- BUG_ON(a->non_resident);
- /* The total length of the attribute value. */
- attr_len = le32_to_cpu(a->data.resident.value_length);
- BUG_ON(old_i_size != (loff_t)attr_len);
- /*
- * Do the zeroing in the mft record and update the attribute size in
- * the mft record.
- */
- kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset);
- memset(kattr + attr_len, 0, new_init_size - attr_len);
- a->data.resident.value_length = cpu_to_le32((u32)new_init_size);
- /* Finally, update the sizes in the vfs and ntfs inodes. */
- write_lock_irqsave(&ni->size_lock, flags);
- i_size_write(vi, new_init_size);
- ni->initialized_size = new_init_size;
- write_unlock_irqrestore(&ni->size_lock, flags);
- goto done;
-do_non_resident_extend:
- /*
- * If the new initialized size @new_init_size exceeds the current file
- * size (vfs inode->i_size), we need to extend the file size to the
- * new initialized size.
- */
- if (new_init_size > old_i_size) {
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- m = NULL;
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto err_out;
- }
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto err_out;
- }
- m = ctx->mrec;
- a = ctx->attr;
- BUG_ON(!a->non_resident);
- BUG_ON(old_i_size != (loff_t)
- sle64_to_cpu(a->data.non_resident.data_size));
- a->data.non_resident.data_size = cpu_to_sle64(new_init_size);
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- /* Update the file size in the vfs inode. */
- i_size_write(vi, new_init_size);
- ntfs_attr_put_search_ctx(ctx);
- ctx = NULL;
- unmap_mft_record(base_ni);
- m = NULL;
- }
- mapping = vi->i_mapping;
- index = old_init_size >> PAGE_SHIFT;
- end_index = (new_init_size + PAGE_SIZE - 1) >> PAGE_SHIFT;
- do {
- /*
- * Read the page. If the page is not present, this will zero
- * the uninitialized regions for us.
- */
- page = read_mapping_page(mapping, index, NULL);
- if (IS_ERR(page)) {
- err = PTR_ERR(page);
- goto init_err_out;
- }
- /*
- * Update the initialized size in the ntfs inode. This is
- * enough to make ntfs_writepage() work.
- */
- write_lock_irqsave(&ni->size_lock, flags);
- ni->initialized_size = (s64)(index + 1) << PAGE_SHIFT;
- if (ni->initialized_size > new_init_size)
- ni->initialized_size = new_init_size;
- write_unlock_irqrestore(&ni->size_lock, flags);
- /* Set the page dirty so it gets written out. */
- set_page_dirty(page);
- put_page(page);
- /*
- * Play nice with the vm and the rest of the system. This is
- * very much needed as we can potentially be modifying the
- * initialised size from a very small value to a really huge
- * value, e.g.
- * f = open(somefile, O_TRUNC);
- * truncate(f, 10GiB);
- * seek(f, 10GiB);
- * write(f, 1);
- * And this would mean we would be marking dirty hundreds of
- * thousands of pages or as in the above example more than
- * two and a half million pages!
- *
- * TODO: For sparse pages could optimize this workload by using
- * the FsMisc / MiscFs page bit as a "PageIsSparse" bit. This
- * would be set in read_folio for sparse pages and here we would
- * not need to mark dirty any pages which have this bit set.
- * The only caveat is that we have to clear the bit everywhere
- * where we allocate any clusters that lie in the page or that
- * contain the page.
- *
- * TODO: An even greater optimization would be for us to only
- * call read_folio() on pages which are not in sparse regions as
- * determined from the runlist. This would greatly reduce the
- * number of pages we read and make dirty in the case of sparse
- * files.
- */
- balance_dirty_pages_ratelimited(mapping);
- cond_resched();
- } while (++index < end_index);
- read_lock_irqsave(&ni->size_lock, flags);
- BUG_ON(ni->initialized_size != new_init_size);
- read_unlock_irqrestore(&ni->size_lock, flags);
- /* Now bring in sync the initialized_size in the mft record. */
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- m = NULL;
- goto init_err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto init_err_out;
- }
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto init_err_out;
- }
- m = ctx->mrec;
- a = ctx->attr;
- BUG_ON(!a->non_resident);
- a->data.non_resident.initialized_size = cpu_to_sle64(new_init_size);
-done:
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
- ntfs_debug("Done, initialized_size 0x%llx, i_size 0x%llx.",
- (unsigned long long)new_init_size, i_size_read(vi));
- return 0;
-init_err_out:
- write_lock_irqsave(&ni->size_lock, flags);
- ni->initialized_size = old_init_size;
- write_unlock_irqrestore(&ni->size_lock, flags);
-err_out:
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
- ntfs_debug("Failed. Returning error code %i.", err);
- return err;
-}
+ inode_lock(vi);
+ mutex_lock(&ni->mrec_lock);
+ down_write(&ni->runlist.lock);

-static ssize_t ntfs_prepare_file_for_write(struct kiocb *iocb,
- struct iov_iter *from)
-{
- loff_t pos;
- s64 end, ll;
- ssize_t err;
- unsigned long flags;
- struct file *file = iocb->ki_filp;
- struct inode *vi = file_inode(file);
- ntfs_inode *ni = NTFS_I(vi);
- ntfs_volume *vol = ni->vol;
-
- ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, pos "
- "0x%llx, count 0x%zx.", vi->i_ino,
- (unsigned)le32_to_cpu(ni->type),
- (unsigned long long)iocb->ki_pos,
- iov_iter_count(from));
- err = generic_write_checks(iocb, from);
- if (unlikely(err <= 0))
- goto out;
- /*
- * All checks have passed. Before we start doing any writing we want
- * to abort any totally illegal writes.
- */
- BUG_ON(NInoMstProtected(ni));
- BUG_ON(ni->type != AT_DATA);
- /* If file is encrypted, deny access, just like NT4. */
- if (NInoEncrypted(ni)) {
- /* Only $DATA attributes can be encrypted. */
- /*
- * Reminder for later: Encrypted files are _always_
- * non-resident so that the content can always be encrypted.
- */
- ntfs_debug("Denying write access to encrypted file.");
- err = -EACCES;
- goto out;
- }
- if (NInoCompressed(ni)) {
- /* Only unnamed $DATA attribute can be compressed. */
- BUG_ON(ni->name_len);
- /*
- * Reminder for later: If resident, the data is not actually
- * compressed. Only on the switch to non-resident does
- * compression kick in. This is in contrast to encrypted files
- * (see above).
- */
- ntfs_error(vi->i_sb, "Writing to compressed files is not "
- "implemented yet. Sorry.");
- err = -EOPNOTSUPP;
- goto out;
+ aligned_data_size = round_up(ni->data_size, vol->cluster_size);
+ if (aligned_data_size >= ni->allocated_size)
+ goto out_unlock;
+
+ vcn_ds = ntfs_bytes_to_cluster(vol, aligned_data_size);
+ vcn_tr = -1;
+ rc = ni->runlist.count - 2;
+ rl = ni->runlist.rl;
+
+ while (rc >= 0 && rl[rc].lcn == LCN_HOLE && vcn_ds <= rl[rc].vcn) {
+ vcn_tr = rl[rc].vcn;
+ rc--;
}
- err = file_remove_privs(file);
- if (unlikely(err))
- goto out;
- /*
- * Our ->update_time method always succeeds thus file_update_time()
- * cannot fail either so there is no need to check the return code.
- */
- file_update_time(file);
- pos = iocb->ki_pos;
- /* The first byte after the last cluster being written to. */
- end = (pos + iov_iter_count(from) + vol->cluster_size_mask) &
- ~(u64)vol->cluster_size_mask;
- /*
- * If the write goes beyond the allocated size, extend the allocation
- * to cover the whole of the write, rounded up to the nearest cluster.
- */
- read_lock_irqsave(&ni->size_lock, flags);
- ll = ni->allocated_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- if (end > ll) {
- /*
- * Extend the allocation without changing the data size.
- *
- * Note we ensure the allocation is big enough to at least
- * write some data but we do not require the allocation to be
- * complete, i.e. it may be partial.
- */
- ll = ntfs_attr_extend_allocation(ni, end, -1, pos);
- if (likely(ll >= 0)) {
- BUG_ON(pos >= ll);
- /* If the extension was partial truncate the write. */
- if (end > ll) {
- ntfs_debug("Truncating write to inode 0x%lx, "
- "attribute type 0x%x, because "
- "the allocation was only "
- "partially extended.",
- vi->i_ino, (unsigned)
- le32_to_cpu(ni->type));
- iov_iter_truncate(from, ll - pos);
- }
+
+ if (vcn_tr >= 0) {
+ err = ntfs_rl_truncate_nolock(vol, &ni->runlist, vcn_tr);
+ if (err) {
+ kvfree(ni->runlist.rl);
+ ni->runlist.rl = NULL;
+ ntfs_error(vol->sb, "Preallocated block rollback failed");
} else {
- err = ll;
- read_lock_irqsave(&ni->size_lock, flags);
- ll = ni->allocated_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- /* Perform a partial write if possible or fail. */
- if (pos < ll) {
- ntfs_debug("Truncating write to inode 0x%lx "
- "attribute type 0x%x, because "
- "extending the allocation "
- "failed (error %d).",
- vi->i_ino, (unsigned)
- le32_to_cpu(ni->type),
- (int)-err);
- iov_iter_truncate(from, ll - pos);
- } else {
- if (err != -ENOSPC)
- ntfs_error(vi->i_sb, "Cannot perform "
- "write to inode "
- "0x%lx, attribute "
- "type 0x%x, because "
- "extending the "
- "allocation failed "
- "(error %ld).",
- vi->i_ino, (unsigned)
- le32_to_cpu(ni->type),
- (long)-err);
- else
- ntfs_debug("Cannot perform write to "
- "inode 0x%lx, "
- "attribute type 0x%x, "
- "because there is not "
- "space left.",
- vi->i_ino, (unsigned)
- le32_to_cpu(ni->type));
- goto out;
- }
+ ni->allocated_size = ntfs_cluster_to_bytes(vol, vcn_tr);
+ err = ntfs_attr_update_mapping_pairs(ni, 0);
+ if (err)
+ ntfs_error(vol->sb,
+ "Failed to rollback mapping pairs for prealloc");
}
}
- /*
- * If the write starts beyond the initialized size, extend it up to the
- * beginning of the write and initialize all non-sparse space between
- * the old initialized size and the new one. This automatically also
- * increments the vfs inode->i_size to keep it above or equal to the
- * initialized_size.
- */
- read_lock_irqsave(&ni->size_lock, flags);
- ll = ni->initialized_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- if (pos > ll) {
- /*
- * Wait for ongoing direct i/o to complete before proceeding.
- * New direct i/o cannot start as we hold i_mutex.
- */
- inode_dio_wait(vi);
- err = ntfs_attr_extend_initialized(ni, pos);
- if (unlikely(err < 0))
- ntfs_error(vi->i_sb, "Cannot perform write to inode "
- "0x%lx, attribute type 0x%x, because "
- "extending the initialized size "
- "failed (error %d).", vi->i_ino,
- (unsigned)le32_to_cpu(ni->type),
- (int)-err);
- }
-out:
- return err;
-}

-/**
- * __ntfs_grab_cache_pages - obtain a number of locked pages
- * @mapping: address space mapping from which to obtain page cache pages
- * @index: starting index in @mapping at which to begin obtaining pages
- * @nr_pages: number of page cache pages to obtain
- * @pages: array of pages in which to return the obtained page cache pages
- * @cached_page: allocated but as yet unused page
- *
- * Obtain @nr_pages locked page cache pages from the mapping @mapping and
- * starting at index @index.
- *
- * If a page is newly created, add it to lru list
- *
- * Note, the page locks are obtained in ascending page index order.
- */
-static inline int __ntfs_grab_cache_pages(struct address_space *mapping,
- pgoff_t index, const unsigned nr_pages, struct page **pages,
- struct page **cached_page)
-{
- int err, nr;
-
- BUG_ON(!nr_pages);
- err = nr = 0;
- do {
- pages[nr] = find_get_page_flags(mapping, index, FGP_LOCK |
- FGP_ACCESSED);
- if (!pages[nr]) {
- if (!*cached_page) {
- *cached_page = page_cache_alloc(mapping);
- if (unlikely(!*cached_page)) {
- err = -ENOMEM;
- goto err_out;
- }
- }
- err = add_to_page_cache_lru(*cached_page, mapping,
- index,
- mapping_gfp_constraint(mapping, GFP_KERNEL));
- if (unlikely(err)) {
- if (err == -EEXIST)
- continue;
- goto err_out;
- }
- pages[nr] = *cached_page;
- *cached_page = NULL;
- }
- index++;
- nr++;
- } while (nr < nr_pages);
-out:
+out_unlock:
+ up_write(&ni->runlist.lock);
+ mutex_unlock(&ni->mrec_lock);
+ inode_unlock(vi);
+
return err;
-err_out:
- while (nr > 0) {
- unlock_page(pages[--nr]);
- put_page(pages[nr]);
- }
- goto out;
}

-static inline void ntfs_submit_bh_for_read(struct buffer_head *bh)
+static int ntfs_file_release(struct inode *vi, struct file *filp)
{
- lock_buffer(bh);
- get_bh(bh);
- bh->b_end_io = end_buffer_read_sync;
- submit_bh(REQ_OP_READ, bh);
+ if (!NInoCompressed(NTFS_I(vi)))
+ return ntfs_trim_prealloc(vi);
+
+ return 0;
}

-/**
- * ntfs_prepare_pages_for_non_resident_write - prepare pages for receiving data
- * @pages: array of destination pages
- * @nr_pages: number of pages in @pages
- * @pos: byte position in file at which the write begins
- * @bytes: number of bytes to be written
+/*
+ * ntfs_file_fsync - sync a file to disk
+ * @filp: file to be synced
+ * @start: start offset to be synced
+ * @end: end offset to be synced
+ * @datasync: if non-zero only flush user data and not metadata
*
- * This is called for non-resident attributes from ntfs_file_buffered_write()
- * with i_mutex held on the inode (@pages[0]->mapping->host). There are
- * @nr_pages pages in @pages which are locked but not kmap()ped. The source
- * data has not yet been copied into the @pages.
- *
- * Need to fill any holes with actual clusters, allocate buffers if necessary,
- * ensure all the buffers are mapped, and bring uptodate any buffers that are
- * only partially being written to.
+ * Data integrity sync of a file to disk. Used for fsync, fdatasync, and msync
+ * system calls. This function is inspired by fs/buffer.c::file_fsync().
*
- * If @nr_pages is greater than one, we are guaranteed that the cluster size is
- * greater than PAGE_SIZE, that all pages in @pages are entirely inside
- * the same cluster and that they are the entirety of that cluster, and that
- * the cluster is sparse, i.e. we need to allocate a cluster to fill the hole.
+ * If @datasync is false, write the mft record and all associated extent mft
+ * records as well as the $DATA attribute and then sync the block device.
*
- * i_size is not to be modified yet.
+ * If @datasync is true and the attribute is non-resident, we skip the writing
+ * of the mft record and all associated extent mft records (this might still
+ * happen due to the write_inode_now() call).
*
- * Return 0 on success or -errno on error.
+ * Also, if @datasync is true, we do not wait on the inode to be written out
+ * but we always wait on the page cache pages to be written out.
*/
-static int ntfs_prepare_pages_for_non_resident_write(struct page **pages,
- unsigned nr_pages, s64 pos, size_t bytes)
+static int ntfs_file_fsync(struct file *filp, loff_t start, loff_t end,
+ int datasync)
{
- VCN vcn, highest_vcn = 0, cpos, cend, bh_cpos, bh_cend;
- LCN lcn;
- s64 bh_pos, vcn_len, end, initialized_size;
- sector_t lcn_block;
- struct folio *folio;
- struct inode *vi;
- ntfs_inode *ni, *base_ni = NULL;
- ntfs_volume *vol;
- runlist_element *rl, *rl2;
- struct buffer_head *bh, *head, *wait[2], **wait_bh = wait;
- ntfs_attr_search_ctx *ctx = NULL;
- MFT_RECORD *m = NULL;
- ATTR_RECORD *a = NULL;
- unsigned long flags;
- u32 attr_rec_len = 0;
- unsigned blocksize, u;
- int err, mp_size;
- bool rl_write_locked, was_hole, is_retry;
- unsigned char blocksize_bits;
- struct {
- u8 runlist_merged:1;
- u8 mft_attr_mapped:1;
- u8 mp_rebuilt:1;
- u8 attr_switched:1;
- } status = { 0, 0, 0, 0 };
-
- BUG_ON(!nr_pages);
- BUG_ON(!pages);
- BUG_ON(!*pages);
- vi = pages[0]->mapping->host;
- ni = NTFS_I(vi);
- vol = ni->vol;
- ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, start page "
- "index 0x%lx, nr_pages 0x%x, pos 0x%llx, bytes 0x%zx.",
- vi->i_ino, ni->type, pages[0]->index, nr_pages,
- (long long)pos, bytes);
- blocksize = vol->sb->s_blocksize;
- blocksize_bits = vol->sb->s_blocksize_bits;
- rl_write_locked = false;
- rl = NULL;
- err = 0;
- vcn = lcn = -1;
- vcn_len = 0;
- lcn_block = -1;
- was_hole = false;
- cpos = pos >> vol->cluster_size_bits;
- end = pos + bytes;
- cend = (end + vol->cluster_size - 1) >> vol->cluster_size_bits;
- /*
- * Loop over each buffer in each folio. Use goto to
- * reduce indentation.
- */
- u = 0;
-do_next_folio:
- folio = page_folio(pages[u]);
- bh_pos = folio_pos(folio);
- head = folio_buffers(folio);
- if (!head)
- /*
- * create_empty_buffers() will create uptodate/dirty
- * buffers if the folio is uptodate/dirty.
- */
- head = create_empty_buffers(folio, blocksize, 0);
- bh = head;
- do {
- VCN cdelta;
- s64 bh_end;
- unsigned bh_cofs;
-
- /* Clear buffer_new on all buffers to reinitialise state. */
- if (buffer_new(bh))
- clear_buffer_new(bh);
- bh_end = bh_pos + blocksize;
- bh_cpos = bh_pos >> vol->cluster_size_bits;
- bh_cofs = bh_pos & vol->cluster_size_mask;
- if (buffer_mapped(bh)) {
- /*
- * The buffer is already mapped. If it is uptodate,
- * ignore it.
- */
- if (buffer_uptodate(bh))
- continue;
- /*
- * The buffer is not uptodate. If the folio is uptodate
- * set the buffer uptodate and otherwise ignore it.
- */
- if (folio_test_uptodate(folio)) {
- set_buffer_uptodate(bh);
+ struct inode *vi = filp->f_mapping->host;
+ struct ntfs_inode *ni = NTFS_I(vi);
+ struct ntfs_volume *vol = ni->vol;
+ int err, ret = 0;
+ struct inode *parent_vi, *ia_vi;
+ struct ntfs_attr_search_ctx *ctx;
+
+ ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
+
+ if (NVolShutdown(vol))
+ return -EIO;
+
+ err = file_write_and_wait_range(filp, start, end);
+ if (err)
+ return err;
+
+ if (!datasync || !NInoNonResident(NTFS_I(vi)))
+ ret = __ntfs_write_inode(vi, 1);
+ write_inode_now(vi, !datasync);
+
+ ctx = ntfs_attr_get_search_ctx(ni, NULL);
+ if (!ctx)
+ return -ENOMEM;
+
+ mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL_CHILD);
+ while (!(err = ntfs_attr_lookup(AT_UNUSED, NULL, 0, 0, 0, NULL, 0, ctx))) {
+ if (ctx->attr->type == AT_FILE_NAME) {
+ struct file_name_attr *fn = (struct file_name_attr *)((u8 *)ctx->attr +
+ le16_to_cpu(ctx->attr->data.resident.value_offset));
+
+ parent_vi = ntfs_iget(vi->i_sb, MREF_LE(fn->parent_directory));
+ if (IS_ERR(parent_vi))
continue;
- }
- /*
- * Neither the folio nor the buffer are uptodate. If
- * the buffer is only partially being written to, we
- * need to read it in before the write, i.e. now.
- */
- if ((bh_pos < pos && bh_end > pos) ||
- (bh_pos < end && bh_end > end)) {
- /*
- * If the buffer is fully or partially within
- * the initialized size, do an actual read.
- * Otherwise, simply zero the buffer.
- */
- read_lock_irqsave(&ni->size_lock, flags);
- initialized_size = ni->initialized_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- if (bh_pos < initialized_size) {
- ntfs_submit_bh_for_read(bh);
- *wait_bh++ = bh;
- } else {
- folio_zero_range(folio, bh_offset(bh),
- blocksize);
- set_buffer_uptodate(bh);
- }
- }
- continue;
- }
- /* Unmapped buffer. Need to map it. */
- bh->b_bdev = vol->sb->s_bdev;
- /*
- * If the current buffer is in the same clusters as the map
- * cache, there is no need to check the runlist again. The
- * map cache is made up of @vcn, which is the first cached file
- * cluster, @vcn_len which is the number of cached file
- * clusters, @lcn is the device cluster corresponding to @vcn,
- * and @lcn_block is the block number corresponding to @lcn.
- */
- cdelta = bh_cpos - vcn;
- if (likely(!cdelta || (cdelta > 0 && cdelta < vcn_len))) {
-map_buffer_cached:
- BUG_ON(lcn < 0);
- bh->b_blocknr = lcn_block +
- (cdelta << (vol->cluster_size_bits -
- blocksize_bits)) +
- (bh_cofs >> blocksize_bits);
- set_buffer_mapped(bh);
- /*
- * If the folio is uptodate so is the buffer. If the
- * buffer is fully outside the write, we ignore it if
- * it was already allocated and we mark it dirty so it
- * gets written out if we allocated it. On the other
- * hand, if we allocated the buffer but we are not
- * marking it dirty we set buffer_new so we can do
- * error recovery.
- */
- if (folio_test_uptodate(folio)) {
- if (!buffer_uptodate(bh))
- set_buffer_uptodate(bh);
- if (unlikely(was_hole)) {
- /* We allocated the buffer. */
- clean_bdev_bh_alias(bh);
- if (bh_end <= pos || bh_pos >= end)
- mark_buffer_dirty(bh);
- else
- set_buffer_new(bh);
- }
+ mutex_lock_nested(&NTFS_I(parent_vi)->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+ ia_vi = ntfs_index_iget(parent_vi, I30, 4);
+ mutex_unlock(&NTFS_I(parent_vi)->mrec_lock);
+ if (IS_ERR(ia_vi)) {
+ iput(parent_vi);
continue;
}
- /* Page is _not_ uptodate. */
- if (likely(!was_hole)) {
- /*
- * Buffer was already allocated. If it is not
- * uptodate and is only partially being written
- * to, we need to read it in before the write,
- * i.e. now.
- */
- if (!buffer_uptodate(bh) && bh_pos < end &&
- bh_end > pos &&
- (bh_pos < pos ||
- bh_end > end)) {
- /*
- * If the buffer is fully or partially
- * within the initialized size, do an
- * actual read. Otherwise, simply zero
- * the buffer.
- */
- read_lock_irqsave(&ni->size_lock,
- flags);
- initialized_size = ni->initialized_size;
- read_unlock_irqrestore(&ni->size_lock,
- flags);
- if (bh_pos < initialized_size) {
- ntfs_submit_bh_for_read(bh);
- *wait_bh++ = bh;
- } else {
- folio_zero_range(folio,
- bh_offset(bh),
- blocksize);
- set_buffer_uptodate(bh);
- }
- }
+ write_inode_now(ia_vi, 1);
+ iput(ia_vi);
+ write_inode_now(parent_vi, 1);
+ iput(parent_vi);
+ } else if (ctx->attr->non_resident) {
+ struct inode *attr_vi;
+ __le16 *name;
+
+ name = (__le16 *)((u8 *)ctx->attr + le16_to_cpu(ctx->attr->name_offset));
+ if (ctx->attr->type == AT_DATA && ctx->attr->name_length == 0)
continue;
- }
- /* We allocated the buffer. */
- clean_bdev_bh_alias(bh);
- /*
- * If the buffer is fully outside the write, zero it,
- * set it uptodate, and mark it dirty so it gets
- * written out. If it is partially being written to,
- * zero region surrounding the write but leave it to
- * commit write to do anything else. Finally, if the
- * buffer is fully being overwritten, do nothing.
- */
- if (bh_end <= pos || bh_pos >= end) {
- if (!buffer_uptodate(bh)) {
- folio_zero_range(folio, bh_offset(bh),
- blocksize);
- set_buffer_uptodate(bh);
- }
- mark_buffer_dirty(bh);
+
+ attr_vi = ntfs_attr_iget(vi, ctx->attr->type,
+ name, ctx->attr->name_length);
+ if (IS_ERR(attr_vi))
continue;
- }
- set_buffer_new(bh);
- if (!buffer_uptodate(bh) &&
- (bh_pos < pos || bh_end > end)) {
- u8 *kaddr;
- unsigned pofs;
-
- kaddr = kmap_local_folio(folio, 0);
- if (bh_pos < pos) {
- pofs = bh_pos & ~PAGE_MASK;
- memset(kaddr + pofs, 0, pos - bh_pos);
- }
- if (bh_end > end) {
- pofs = end & ~PAGE_MASK;
- memset(kaddr + pofs, 0, bh_end - end);
- }
- kunmap_local(kaddr);
- flush_dcache_folio(folio);
- }
- continue;
- }
- /*
- * Slow path: this is the first buffer in the cluster. If it
- * is outside allocated size and is not uptodate, zero it and
- * set it uptodate.
- */
- read_lock_irqsave(&ni->size_lock, flags);
- initialized_size = ni->allocated_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- if (bh_pos > initialized_size) {
- if (folio_test_uptodate(folio)) {
- if (!buffer_uptodate(bh))
- set_buffer_uptodate(bh);
- } else if (!buffer_uptodate(bh)) {
- folio_zero_range(folio, bh_offset(bh),
- blocksize);
- set_buffer_uptodate(bh);
- }
- continue;
- }
- is_retry = false;
- if (!rl) {
- down_read(&ni->runlist.lock);
-retry_remap:
- rl = ni->runlist.rl;
- }
- if (likely(rl != NULL)) {
- /* Seek to element containing target cluster. */
- while (rl->length && rl[1].vcn <= bh_cpos)
- rl++;
- lcn = ntfs_rl_vcn_to_lcn(rl, bh_cpos);
- if (likely(lcn >= 0)) {
- /*
- * Successful remap, setup the map cache and
- * use that to deal with the buffer.
- */
- was_hole = false;
- vcn = bh_cpos;
- vcn_len = rl[1].vcn - vcn;
- lcn_block = lcn << (vol->cluster_size_bits -
- blocksize_bits);
- cdelta = 0;
- /*
- * If the number of remaining clusters touched
- * by the write is smaller or equal to the
- * number of cached clusters, unlock the
- * runlist as the map cache will be used from
- * now on.
- */
- if (likely(vcn + vcn_len >= cend)) {
- if (rl_write_locked) {
- up_write(&ni->runlist.lock);
- rl_write_locked = false;
- } else
- up_read(&ni->runlist.lock);
- rl = NULL;
- }
- goto map_buffer_cached;
- }
- } else
- lcn = LCN_RL_NOT_MAPPED;
- /*
- * If it is not a hole and not out of bounds, the runlist is
- * probably unmapped so try to map it now.
- */
- if (unlikely(lcn != LCN_HOLE && lcn != LCN_ENOENT)) {
- if (likely(!is_retry && lcn == LCN_RL_NOT_MAPPED)) {
- /* Attempt to map runlist. */
- if (!rl_write_locked) {
- /*
- * We need the runlist locked for
- * writing, so if it is locked for
- * reading relock it now and retry in
- * case it changed whilst we dropped
- * the lock.
- */
- up_read(&ni->runlist.lock);
- down_write(&ni->runlist.lock);
- rl_write_locked = true;
- goto retry_remap;
- }
- err = ntfs_map_runlist_nolock(ni, bh_cpos,
- NULL);
- if (likely(!err)) {
- is_retry = true;
- goto retry_remap;
- }
- /*
- * If @vcn is out of bounds, pretend @lcn is
- * LCN_ENOENT. As long as the buffer is out
- * of bounds this will work fine.
- */
- if (err == -ENOENT) {
- lcn = LCN_ENOENT;
- err = 0;
- goto rl_not_mapped_enoent;
- }
+ spin_lock(&attr_vi->i_lock);
+ if (inode_state_read_once(attr_vi) & I_DIRTY_PAGES) {
+ spin_unlock(&attr_vi->i_lock);
+ filemap_write_and_wait(attr_vi->i_mapping);
} else
- err = -EIO;
- /* Failed to map the buffer, even after retrying. */
- bh->b_blocknr = -1;
- ntfs_error(vol->sb, "Failed to write to inode 0x%lx, "
- "attribute type 0x%x, vcn 0x%llx, "
- "vcn offset 0x%x, because its "
- "location on disk could not be "
- "determined%s (error code %i).",
- ni->mft_no, ni->type,
- (unsigned long long)bh_cpos,
- (unsigned)bh_pos &
- vol->cluster_size_mask,
- is_retry ? " even after retrying" : "",
- err);
- break;
- }
-rl_not_mapped_enoent:
- /*
- * The buffer is in a hole or out of bounds. We need to fill
- * the hole, unless the buffer is in a cluster which is not
- * touched by the write, in which case we just leave the buffer
- * unmapped. This can only happen when the cluster size is
- * less than the page cache size.
- */
- if (unlikely(vol->cluster_size < PAGE_SIZE)) {
- bh_cend = (bh_end + vol->cluster_size - 1) >>
- vol->cluster_size_bits;
- if ((bh_cend <= cpos || bh_cpos >= cend)) {
- bh->b_blocknr = -1;
- /*
- * If the buffer is uptodate we skip it. If it
- * is not but the folio is uptodate, we can set
- * the buffer uptodate. If the folio is not
- * uptodate, we can clear the buffer and set it
- * uptodate. Whether this is worthwhile is
- * debatable and this could be removed.
- */
- if (folio_test_uptodate(folio)) {
- if (!buffer_uptodate(bh))
- set_buffer_uptodate(bh);
- } else if (!buffer_uptodate(bh)) {
- folio_zero_range(folio, bh_offset(bh),
- blocksize);
- set_buffer_uptodate(bh);
- }
- continue;
- }
- }
- /*
- * Out of bounds buffer is invalid if it was not really out of
- * bounds.
- */
- BUG_ON(lcn != LCN_HOLE);
- /*
- * We need the runlist locked for writing, so if it is locked
- * for reading relock it now and retry in case it changed
- * whilst we dropped the lock.
- */
- BUG_ON(!rl);
- if (!rl_write_locked) {
- up_read(&ni->runlist.lock);
- down_write(&ni->runlist.lock);
- rl_write_locked = true;
- goto retry_remap;
- }
- /* Find the previous last allocated cluster. */
- BUG_ON(rl->lcn != LCN_HOLE);
- lcn = -1;
- rl2 = rl;
- while (--rl2 >= ni->runlist.rl) {
- if (rl2->lcn >= 0) {
- lcn = rl2->lcn + rl2->length;
- break;
- }
- }
- rl2 = ntfs_cluster_alloc(vol, bh_cpos, 1, lcn, DATA_ZONE,
- false);
- if (IS_ERR(rl2)) {
- err = PTR_ERR(rl2);
- ntfs_debug("Failed to allocate cluster, error code %i.",
- err);
- break;
- }
- lcn = rl2->lcn;
- rl = ntfs_runlists_merge(ni->runlist.rl, rl2);
- if (IS_ERR(rl)) {
- err = PTR_ERR(rl);
- if (err != -ENOMEM)
- err = -EIO;
- if (ntfs_cluster_free_from_rl(vol, rl2)) {
- ntfs_error(vol->sb, "Failed to release "
- "allocated cluster in error "
- "code path. Run chkdsk to "
- "recover the lost cluster.");
- NVolSetErrors(vol);
- }
- ntfs_free(rl2);
- break;
- }
- ni->runlist.rl = rl;
- status.runlist_merged = 1;
- ntfs_debug("Allocated cluster, lcn 0x%llx.",
- (unsigned long long)lcn);
- /* Map and lock the mft record and get the attribute record. */
- if (!NInoAttr(ni))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- break;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- unmap_mft_record(base_ni);
- break;
- }
- status.mft_attr_mapped = 1;
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, bh_cpos, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- break;
- }
- m = ctx->mrec;
- a = ctx->attr;
- /*
- * Find the runlist element with which the attribute extent
- * starts. Note, we cannot use the _attr_ version because we
- * have mapped the mft record. That is ok because we know the
- * runlist fragment must be mapped already to have ever gotten
- * here, so we can just use the _rl_ version.
- */
- vcn = sle64_to_cpu(a->data.non_resident.lowest_vcn);
- rl2 = ntfs_rl_find_vcn_nolock(rl, vcn);
- BUG_ON(!rl2);
- BUG_ON(!rl2->length);
- BUG_ON(rl2->lcn < LCN_HOLE);
- highest_vcn = sle64_to_cpu(a->data.non_resident.highest_vcn);
- /*
- * If @highest_vcn is zero, calculate the real highest_vcn
- * (which can really be zero).
- */
- if (!highest_vcn)
- highest_vcn = (sle64_to_cpu(
- a->data.non_resident.allocated_size) >>
- vol->cluster_size_bits) - 1;
- /*
- * Determine the size of the mapping pairs array for the new
- * extent, i.e. the old extent with the hole filled.
- */
- mp_size = ntfs_get_size_for_mapping_pairs(vol, rl2, vcn,
- highest_vcn);
- if (unlikely(mp_size <= 0)) {
- if (!(err = mp_size))
- err = -EIO;
- ntfs_debug("Failed to get size for mapping pairs "
- "array, error code %i.", err);
- break;
- }
- /*
- * Resize the attribute record to fit the new mapping pairs
- * array.
- */
- attr_rec_len = le32_to_cpu(a->length);
- err = ntfs_attr_record_resize(m, a, mp_size + le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset));
- if (unlikely(err)) {
- BUG_ON(err != -ENOSPC);
- // TODO: Deal with this by using the current attribute
- // and fill it with as much of the mapping pairs
- // array as possible. Then loop over each attribute
- // extent rewriting the mapping pairs arrays as we go
- // along and if when we reach the end we have not
- // enough space, try to resize the last attribute
- // extent and if even that fails, add a new attribute
- // extent.
- // We could also try to resize at each step in the hope
- // that we will not need to rewrite every single extent.
- // Note, we may need to decompress some extents to fill
- // the runlist as we are walking the extents...
- ntfs_error(vol->sb, "Not enough space in the mft "
- "record for the extended attribute "
- "record. This case is not "
- "implemented yet.");
- err = -EOPNOTSUPP;
- break ;
- }
- status.mp_rebuilt = 1;
- /*
- * Generate the mapping pairs array directly into the attribute
- * record.
- */
- err = ntfs_mapping_pairs_build(vol, (u8*)a + le16_to_cpu(
- a->data.non_resident.mapping_pairs_offset),
- mp_size, rl2, vcn, highest_vcn, NULL);
- if (unlikely(err)) {
- ntfs_error(vol->sb, "Cannot fill hole in inode 0x%lx, "
- "attribute type 0x%x, because building "
- "the mapping pairs failed with error "
- "code %i.", vi->i_ino,
- (unsigned)le32_to_cpu(ni->type), err);
- err = -EIO;
- break;
- }
- /* Update the highest_vcn but only if it was not set. */
- if (unlikely(!a->data.non_resident.highest_vcn))
- a->data.non_resident.highest_vcn =
- cpu_to_sle64(highest_vcn);
- /*
- * If the attribute is sparse/compressed, update the compressed
- * size in the ntfs_inode structure and the attribute record.
- */
- if (likely(NInoSparse(ni) || NInoCompressed(ni))) {
- /*
- * If we are not in the first attribute extent, switch
- * to it, but first ensure the changes will make it to
- * disk later.
- */
- if (a->data.non_resident.lowest_vcn) {
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_reinit_search_ctx(ctx);
- err = ntfs_attr_lookup(ni->type, ni->name,
- ni->name_len, CASE_SENSITIVE,
- 0, NULL, 0, ctx);
- if (unlikely(err)) {
- status.attr_switched = 1;
- break;
- }
- /* @m is not used any more so do not set it. */
- a = ctx->attr;
- }
- write_lock_irqsave(&ni->size_lock, flags);
- ni->itype.compressed.size += vol->cluster_size;
- a->data.non_resident.compressed_size =
- cpu_to_sle64(ni->itype.compressed.size);
- write_unlock_irqrestore(&ni->size_lock, flags);
- }
- /* Ensure the changes make it to disk. */
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- /* Successfully filled the hole. */
- status.runlist_merged = 0;
- status.mft_attr_mapped = 0;
- status.mp_rebuilt = 0;
- /* Setup the map cache and use that to deal with the buffer. */
- was_hole = true;
- vcn = bh_cpos;
- vcn_len = 1;
- lcn_block = lcn << (vol->cluster_size_bits - blocksize_bits);
- cdelta = 0;
- /*
- * If the number of remaining clusters in the @pages is smaller
- * or equal to the number of cached clusters, unlock the
- * runlist as the map cache will be used from now on.
- */
- if (likely(vcn + vcn_len >= cend)) {
- up_write(&ni->runlist.lock);
- rl_write_locked = false;
- rl = NULL;
- }
- goto map_buffer_cached;
- } while (bh_pos += blocksize, (bh = bh->b_this_page) != head);
- /* If there are no errors, do the next page. */
- if (likely(!err && ++u < nr_pages))
- goto do_next_folio;
- /* If there are no errors, release the runlist lock if we took it. */
- if (likely(!err)) {
- if (unlikely(rl_write_locked)) {
- up_write(&ni->runlist.lock);
- rl_write_locked = false;
- } else if (unlikely(rl))
- up_read(&ni->runlist.lock);
- rl = NULL;
- }
- /* If we issued read requests, let them complete. */
- read_lock_irqsave(&ni->size_lock, flags);
- initialized_size = ni->initialized_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- while (wait_bh > wait) {
- bh = *--wait_bh;
- wait_on_buffer(bh);
- if (likely(buffer_uptodate(bh))) {
- folio = bh->b_folio;
- bh_pos = folio_pos(folio) + bh_offset(bh);
- /*
- * If the buffer overflows the initialized size, need
- * to zero the overflowing region.
- */
- if (unlikely(bh_pos + blocksize > initialized_size)) {
- int ofs = 0;
-
- if (likely(bh_pos < initialized_size))
- ofs = initialized_size - bh_pos;
- folio_zero_segment(folio, bh_offset(bh) + ofs,
- blocksize);
- }
- } else /* if (unlikely(!buffer_uptodate(bh))) */
- err = -EIO;
- }
- if (likely(!err)) {
- /* Clear buffer_new on all buffers. */
- u = 0;
- do {
- bh = head = page_buffers(pages[u]);
- do {
- if (buffer_new(bh))
- clear_buffer_new(bh);
- } while ((bh = bh->b_this_page) != head);
- } while (++u < nr_pages);
- ntfs_debug("Done.");
- return err;
- }
- if (status.attr_switched) {
- /* Get back to the attribute extent we modified. */
- ntfs_attr_reinit_search_ctx(ctx);
- if (ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, bh_cpos, NULL, 0, ctx)) {
- ntfs_error(vol->sb, "Failed to find required "
- "attribute extent of attribute in "
- "error code path. Run chkdsk to "
- "recover.");
- write_lock_irqsave(&ni->size_lock, flags);
- ni->itype.compressed.size += vol->cluster_size;
- write_unlock_irqrestore(&ni->size_lock, flags);
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- /*
- * The only thing that is now wrong is the compressed
- * size of the base attribute extent which chkdsk
- * should be able to fix.
- */
- NVolSetErrors(vol);
- } else {
- m = ctx->mrec;
- a = ctx->attr;
- status.attr_switched = 0;
- }
- }
- /*
- * If the runlist has been modified, need to restore it by punching a
- * hole into it and we then need to deallocate the on-disk cluster as
- * well. Note, we only modify the runlist if we are able to generate a
- * new mapping pairs array, i.e. only when the mapped attribute extent
- * is not switched.
- */
- if (status.runlist_merged && !status.attr_switched) {
- BUG_ON(!rl_write_locked);
- /* Make the file cluster we allocated sparse in the runlist. */
- if (ntfs_rl_punch_nolock(vol, &ni->runlist, bh_cpos, 1)) {
- ntfs_error(vol->sb, "Failed to punch hole into "
- "attribute runlist in error code "
- "path. Run chkdsk to recover the "
- "lost cluster.");
- NVolSetErrors(vol);
- } else /* if (success) */ {
- status.runlist_merged = 0;
- /*
- * Deallocate the on-disk cluster we allocated but only
- * if we succeeded in punching its vcn out of the
- * runlist.
- */
- down_write(&vol->lcnbmp_lock);
- if (ntfs_bitmap_clear_bit(vol->lcnbmp_ino, lcn)) {
- ntfs_error(vol->sb, "Failed to release "
- "allocated cluster in error "
- "code path. Run chkdsk to "
- "recover the lost cluster.");
- NVolSetErrors(vol);
- }
- up_write(&vol->lcnbmp_lock);
+ spin_unlock(&attr_vi->i_lock);
+ iput(attr_vi);
}
}
- /*
- * Resize the attribute record to its old size and rebuild the mapping
- * pairs array. Note, we only can do this if the runlist has been
- * restored to its old state which also implies that the mapped
- * attribute extent is not switched.
- */
- if (status.mp_rebuilt && !status.runlist_merged) {
- if (ntfs_attr_record_resize(m, a, attr_rec_len)) {
- ntfs_error(vol->sb, "Failed to restore attribute "
- "record in error code path. Run "
- "chkdsk to recover.");
- NVolSetErrors(vol);
- } else /* if (success) */ {
- if (ntfs_mapping_pairs_build(vol, (u8*)a +
- le16_to_cpu(a->data.non_resident.
- mapping_pairs_offset), attr_rec_len -
- le16_to_cpu(a->data.non_resident.
- mapping_pairs_offset), ni->runlist.rl,
- vcn, highest_vcn, NULL)) {
- ntfs_error(vol->sb, "Failed to restore "
- "mapping pairs array in error "
- "code path. Run chkdsk to "
- "recover.");
- NVolSetErrors(vol);
- }
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- }
- }
- /* Release the mft record and the attribute. */
- if (status.mft_attr_mapped) {
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- }
- /* Release the runlist lock. */
- if (rl_write_locked)
- up_write(&ni->runlist.lock);
- else if (rl)
- up_read(&ni->runlist.lock);
- /*
- * Zero out any newly allocated blocks to avoid exposing stale data.
- * If BH_New is set, we know that the block was newly allocated above
- * and that it has not been fully zeroed and marked dirty yet.
- */
- nr_pages = u;
- u = 0;
- end = bh_cpos << vol->cluster_size_bits;
- do {
- folio = page_folio(pages[u]);
- bh = head = folio_buffers(folio);
- do {
- if (u == nr_pages &&
- folio_pos(folio) + bh_offset(bh) >= end)
- break;
- if (!buffer_new(bh))
- continue;
- clear_buffer_new(bh);
- if (!buffer_uptodate(bh)) {
- if (folio_test_uptodate(folio))
- set_buffer_uptodate(bh);
- else {
- folio_zero_range(folio, bh_offset(bh),
- blocksize);
- set_buffer_uptodate(bh);
- }
- }
- mark_buffer_dirty(bh);
- } while ((bh = bh->b_this_page) != head);
- } while (++u <= nr_pages);
- ntfs_error(vol->sb, "Failed. Returning error code %i.", err);
- return err;
-}
+ mutex_unlock(&ni->mrec_lock);
+ ntfs_attr_put_search_ctx(ctx);
+
+ write_inode_now(vol->mftbmp_ino, 1);
+ down_write(&vol->lcnbmp_lock);
+ write_inode_now(vol->lcnbmp_ino, 1);
+ up_write(&vol->lcnbmp_lock);
+ write_inode_now(vol->mft_ino, 1);

-static inline void ntfs_flush_dcache_pages(struct page **pages,
- unsigned nr_pages)
-{
- BUG_ON(!nr_pages);
/*
- * Warning: Do not do the decrement at the same time as the call to
- * flush_dcache_page() because it is a NULL macro on i386 and hence the
- * decrement never happens so the loop never terminates.
+ * NOTE: If we were to use mapping->private_list (see ext2 and
+ * fs/buffer.c) for dirty blocks then we could optimize the below to be
+ * sync_mapping_buffers(vi->i_mapping).
*/
- do {
- --nr_pages;
- flush_dcache_page(pages[nr_pages]);
- } while (nr_pages > 0);
+ err = sync_blockdev(vi->i_sb->s_bdev);
+ if (unlikely(err && !ret))
+ ret = err;
+ if (likely(!ret))
+ ntfs_debug("Done.");
+ else
+ ntfs_warning(vi->i_sb,
+ "Failed to f%ssync inode 0x%lx. Error %u.",
+ datasync ? "data" : "", vi->i_ino, -ret);
+ if (!ret)
+ blkdev_issue_flush(vi->i_sb->s_bdev);
+ return ret;
}

-/**
- * ntfs_commit_pages_after_non_resident_write - commit the received data
- * @pages: array of destination pages
- * @nr_pages: number of pages in @pages
- * @pos: byte position in file at which the write begins
- * @bytes: number of bytes to be written
- *
- * See description of ntfs_commit_pages_after_write(), below.
- */
-static inline int ntfs_commit_pages_after_non_resident_write(
- struct page **pages, const unsigned nr_pages,
- s64 pos, size_t bytes)
+static int ntfs_setattr_size(struct inode *vi, struct iattr *attr)
{
- s64 end, initialized_size;
- struct inode *vi;
- ntfs_inode *ni, *base_ni;
- struct buffer_head *bh, *head;
- ntfs_attr_search_ctx *ctx;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- unsigned long flags;
- unsigned blocksize, u;
+ struct ntfs_inode *ni = NTFS_I(vi);
int err;
+ loff_t old_size = vi->i_size;

- vi = pages[0]->mapping->host;
- ni = NTFS_I(vi);
- blocksize = vi->i_sb->s_blocksize;
- end = pos + bytes;
- u = 0;
- do {
- s64 bh_pos;
- struct page *page;
- bool partial;
-
- page = pages[u];
- bh_pos = (s64)page->index << PAGE_SHIFT;
- bh = head = page_buffers(page);
- partial = false;
- do {
- s64 bh_end;
-
- bh_end = bh_pos + blocksize;
- if (bh_end <= pos || bh_pos >= end) {
- if (!buffer_uptodate(bh))
- partial = true;
- } else {
- set_buffer_uptodate(bh);
- mark_buffer_dirty(bh);
- }
- } while (bh_pos += blocksize, (bh = bh->b_this_page) != head);
- /*
- * If all buffers are now uptodate but the page is not, set the
- * page uptodate.
- */
- if (!partial && !PageUptodate(page))
- SetPageUptodate(page);
- } while (++u < nr_pages);
- /*
- * Finally, if we do not need to update initialized_size or i_size we
- * are finished.
- */
- read_lock_irqsave(&ni->size_lock, flags);
- initialized_size = ni->initialized_size;
- read_unlock_irqrestore(&ni->size_lock, flags);
- if (end <= initialized_size) {
- ntfs_debug("Done.");
- return 0;
+ if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+ ntfs_warning(vi->i_sb,
+ "Changes in inode size are not supported yet for %s files, ignoring.",
+ NInoCompressed(ni) ? "compressed" : "encrypted");
+ return -EOPNOTSUPP;
}
- /*
- * Update initialized_size/i_size as appropriate, both in the inode and
- * the mft record.
- */
- if (!NInoAttr(ni))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- /* Map, pin, and lock the mft record. */
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- m = NULL;
- ctx = NULL;
- goto err_out;
- }
- BUG_ON(!NInoNonResident(ni));
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto err_out;
+
+ err = inode_newsize_ok(vi, attr->ia_size);
+ if (err)
+ return err;
+
+ inode_dio_wait(vi);
+ /* Serialize against page faults */
+ if (NInoNonResident(NTFS_I(vi)) && attr->ia_size < old_size) {
+ err = iomap_truncate_page(vi, attr->ia_size, NULL,
+ &ntfs_read_iomap_ops,
+ &ntfs_iomap_folio_ops, NULL);
+ if (err)
+ return err;
}
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto err_out;
+
+ truncate_setsize(vi, attr->ia_size);
+ err = ntfs_truncate_vfs(vi, attr->ia_size, old_size);
+ if (err) {
+ i_size_write(vi, old_size);
+ return err;
}
- a = ctx->attr;
- BUG_ON(!a->non_resident);
- write_lock_irqsave(&ni->size_lock, flags);
- BUG_ON(end > ni->allocated_size);
- ni->initialized_size = end;
- a->data.non_resident.initialized_size = cpu_to_sle64(end);
- if (end > i_size_read(vi)) {
- i_size_write(vi, end);
- a->data.non_resident.data_size =
- a->data.non_resident.initialized_size;
+
+ if (NInoNonResident(ni) && attr->ia_size > old_size &&
+ old_size % PAGE_SIZE != 0) {
+ loff_t len = min_t(loff_t,
+ round_up(old_size, PAGE_SIZE) - old_size,
+ attr->ia_size - old_size);
+ err = iomap_zero_range(vi, old_size, len,
+ NULL, &ntfs_seek_iomap_ops,
+ &ntfs_iomap_folio_ops, NULL);
}
- write_unlock_irqrestore(&ni->size_lock, flags);
- /* Mark the mft record dirty, so it gets written back. */
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- ntfs_debug("Done.");
- return 0;
-err_out:
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
- ntfs_error(vi->i_sb, "Failed to update initialized_size/i_size (error "
- "code %i).", err);
- if (err != -ENOMEM)
- NVolSetErrors(ni->vol);
+
return err;
}

-/**
- * ntfs_commit_pages_after_write - commit the received data
- * @pages: array of destination pages
- * @nr_pages: number of pages in @pages
- * @pos: byte position in file at which the write begins
- * @bytes: number of bytes to be written
- *
- * This is called from ntfs_file_buffered_write() with i_mutex held on the inode
- * (@pages[0]->mapping->host). There are @nr_pages pages in @pages which are
- * locked but not kmap()ped. The source data has already been copied into the
- * @page. ntfs_prepare_pages_for_non_resident_write() has been called before
- * the data was copied (for non-resident attributes only) and it returned
- * success.
- *
- * Need to set uptodate and mark dirty all buffers within the boundary of the
- * write. If all buffers in a page are uptodate we set the page uptodate, too.
- *
- * Setting the buffers dirty ensures that they get written out later when
- * ntfs_writepage() is invoked by the VM.
- *
- * Finally, we need to update i_size and initialized_size as appropriate both
- * in the inode and the mft record.
- *
- * This is modelled after fs/buffer.c::generic_commit_write(), which marks
- * buffers uptodate and dirty, sets the page uptodate if all buffers in the
- * page are uptodate, and updates i_size if the end of io is beyond i_size. In
- * that case, it also marks the inode dirty.
+/*
+ * ntfs_setattr
*
- * If things have gone as outlined in
- * ntfs_prepare_pages_for_non_resident_write(), we do not need to do any page
- * content modifications here for non-resident attributes. For resident
- * attributes we need to do the uptodate bringing here which we combine with
- * the copying into the mft record which means we save one atomic kmap.
+ * Called from notify_change() when an attribute is being changed.
*
- * Return 0 on success or -errno on error.
+ * NOTE: Changes in inode size are not supported yet for compressed or
+ * encrypted files.
*/
-static int ntfs_commit_pages_after_write(struct page **pages,
- const unsigned nr_pages, s64 pos, size_t bytes)
+int ntfs_setattr(struct mnt_idmap *idmap, struct dentry *dentry,
+ struct iattr *attr)
{
- s64 end, initialized_size;
- loff_t i_size;
- struct inode *vi;
- ntfs_inode *ni, *base_ni;
- struct page *page;
- ntfs_attr_search_ctx *ctx;
- MFT_RECORD *m;
- ATTR_RECORD *a;
- char *kattr, *kaddr;
- unsigned long flags;
- u32 attr_len;
+ struct inode *vi = d_inode(dentry);
int err;
+ unsigned int ia_valid = attr->ia_valid;
+ struct ntfs_inode *ni = NTFS_I(vi);
+ struct ntfs_volume *vol = ni->vol;

- BUG_ON(!nr_pages);
- BUG_ON(!pages);
- page = pages[0];
- BUG_ON(!page);
- vi = page->mapping->host;
- ni = NTFS_I(vi);
- ntfs_debug("Entering for inode 0x%lx, attribute type 0x%x, start page "
- "index 0x%lx, nr_pages 0x%x, pos 0x%llx, bytes 0x%zx.",
- vi->i_ino, ni->type, page->index, nr_pages,
- (long long)pos, bytes);
- if (NInoNonResident(ni))
- return ntfs_commit_pages_after_non_resident_write(pages,
- nr_pages, pos, bytes);
- BUG_ON(nr_pages > 1);
- /*
- * Attribute is resident, implying it is not compressed, encrypted, or
- * sparse.
- */
- if (!NInoAttr(ni))
- base_ni = ni;
- else
- base_ni = ni->ext.base_ntfs_ino;
- BUG_ON(NInoNonResident(ni));
- /* Map, pin, and lock the mft record. */
- m = map_mft_record(base_ni);
- if (IS_ERR(m)) {
- err = PTR_ERR(m);
- m = NULL;
- ctx = NULL;
- goto err_out;
- }
- ctx = ntfs_attr_get_search_ctx(base_ni, m);
- if (unlikely(!ctx)) {
- err = -ENOMEM;
- goto err_out;
- }
- err = ntfs_attr_lookup(ni->type, ni->name, ni->name_len,
- CASE_SENSITIVE, 0, NULL, 0, ctx);
- if (unlikely(err)) {
- if (err == -ENOENT)
- err = -EIO;
- goto err_out;
- }
- a = ctx->attr;
- BUG_ON(a->non_resident);
- /* The total length of the attribute value. */
- attr_len = le32_to_cpu(a->data.resident.value_length);
- i_size = i_size_read(vi);
- BUG_ON(attr_len != i_size);
- BUG_ON(pos > attr_len);
- end = pos + bytes;
- BUG_ON(end > le32_to_cpu(a->length) -
- le16_to_cpu(a->data.resident.value_offset));
- kattr = (u8*)a + le16_to_cpu(a->data.resident.value_offset);
- kaddr = kmap_atomic(page);
- /* Copy the received data from the page to the mft record. */
- memcpy(kattr + pos, kaddr + pos, bytes);
- /* Update the attribute length if necessary. */
- if (end > attr_len) {
- attr_len = end;
- a->data.resident.value_length = cpu_to_le32(attr_len);
- }
- /*
- * If the page is not uptodate, bring the out of bounds area(s)
- * uptodate by copying data from the mft record to the page.
- */
- if (!PageUptodate(page)) {
- if (pos > 0)
- memcpy(kaddr, kattr, pos);
- if (end < attr_len)
- memcpy(kaddr + end, kattr + end, attr_len - end);
- /* Zero the region outside the end of the attribute value. */
- memset(kaddr + attr_len, 0, PAGE_SIZE - attr_len);
- flush_dcache_page(page);
- SetPageUptodate(page);
+ if (NVolShutdown(vol))
+ return -EIO;
+
+ err = setattr_prepare(idmap, dentry, attr);
+ if (err)
+ goto out;
+
+ if (!(vol->vol_flags & VOLUME_IS_DIRTY))
+ ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY);
+
+ if (ia_valid & ATTR_SIZE) {
+ err = ntfs_setattr_size(vi, attr);
+ if (err)
+ goto out;
+
+ ia_valid |= ATTR_MTIME | ATTR_CTIME;
}
- kunmap_atomic(kaddr);
- /* Update initialized_size/i_size if necessary. */
- read_lock_irqsave(&ni->size_lock, flags);
- initialized_size = ni->initialized_size;
- BUG_ON(end > ni->allocated_size);
- read_unlock_irqrestore(&ni->size_lock, flags);
- BUG_ON(initialized_size != i_size);
- if (end > initialized_size) {
- write_lock_irqsave(&ni->size_lock, flags);
- ni->initialized_size = end;
- i_size_write(vi, end);
- write_unlock_irqrestore(&ni->size_lock, flags);
+
+ setattr_copy(idmap, vi, attr);
+
+ if (vol->sb->s_flags & SB_POSIXACL && !S_ISLNK(vi->i_mode)) {
+ err = posix_acl_chmod(idmap, dentry, vi->i_mode);
+ if (err)
+ goto out;
}
- /* Mark the mft record dirty, so it gets written back. */
- flush_dcache_mft_record_page(ctx->ntfs_ino);
- mark_mft_record_dirty(ctx->ntfs_ino);
- ntfs_attr_put_search_ctx(ctx);
- unmap_mft_record(base_ni);
- ntfs_debug("Done.");
- return 0;
-err_out:
- if (err == -ENOMEM) {
- ntfs_warning(vi->i_sb, "Error allocating memory required to "
- "commit the write.");
- if (PageUptodate(page)) {
- ntfs_warning(vi->i_sb, "Page is uptodate, setting "
- "dirty so the write will be retried "
- "later on by the VM.");
- /*
- * Put the page on mapping->dirty_pages, but leave its
- * buffers' dirty state as-is.
- */
- __set_page_dirty_nobuffers(page);
- err = 0;
- } else
- ntfs_error(vi->i_sb, "Page is not uptodate. Written "
- "data has been lost.");
- } else {
- ntfs_error(vi->i_sb, "Resident attribute commit write failed "
- "with error %i.", err);
- NVolSetErrors(ni->vol);
+
+ if (0222 & vi->i_mode)
+ ni->flags &= ~FILE_ATTR_READONLY;
+ else
+ ni->flags |= FILE_ATTR_READONLY;
+
+ if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
+ unsigned int flags = 0;
+
+ if (ia_valid & ATTR_UID)
+ flags |= NTFS_EA_UID;
+ if (ia_valid & ATTR_GID)
+ flags |= NTFS_EA_GID;
+ if (ia_valid & ATTR_MODE)
+ flags |= NTFS_EA_MODE;
+
+ if (S_ISDIR(vi->i_mode))
+ vi->i_mode &= ~vol->dmask;
+ else
+ vi->i_mode &= ~vol->fmask;
+
+ mutex_lock(&ni->mrec_lock);
+ ntfs_ea_set_wsl_inode(vi, 0, NULL, flags);
+ mutex_unlock(&ni->mrec_lock);
}
- if (ctx)
- ntfs_attr_put_search_ctx(ctx);
- if (m)
- unmap_mft_record(base_ni);
- return err;
-}

-/*
- * Copy as much as we can into the pages and return the number of bytes which
- * were successfully copied. If a fault is encountered then clear the pages
- * out to (ofs + bytes) and return the number of bytes which were copied.
- */
-static size_t ntfs_copy_from_user_iter(struct page **pages, unsigned nr_pages,
- unsigned ofs, struct iov_iter *i, size_t bytes)
-{
- struct page **last_page = pages + nr_pages;
- size_t total = 0;
- unsigned len, copied;
-
- do {
- len = PAGE_SIZE - ofs;
- if (len > bytes)
- len = bytes;
- copied = copy_page_from_iter_atomic(*pages, ofs, len, i);
- total += copied;
- bytes -= copied;
- if (!bytes)
- break;
- if (copied < len)
- goto err;
- ofs = 0;
- } while (++pages < last_page);
+ mark_inode_dirty(vi);
out:
- return total;
-err:
- /* Zero the rest of the target like __copy_from_user(). */
- len = PAGE_SIZE - copied;
- do {
- if (len > bytes)
- len = bytes;
- zero_user(*pages, copied, len);
- bytes -= len;
- copied = 0;
- len = PAGE_SIZE;
- } while (++pages < last_page);
- goto out;
+ return err;
}

-/**
- * ntfs_perform_write - perform buffered write to a file
- * @file: file to write to
- * @i: iov_iter with data to write
- * @pos: byte offset in file at which to begin writing to
- */
-static ssize_t ntfs_perform_write(struct file *file, struct iov_iter *i,
- loff_t pos)
+int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path,
+ struct kstat *stat, unsigned int request_mask,
+ unsigned int query_flags)
{
- struct address_space *mapping = file->f_mapping;
- struct inode *vi = mapping->host;
- ntfs_inode *ni = NTFS_I(vi);
- ntfs_volume *vol = ni->vol;
- struct page *pages[NTFS_MAX_PAGES_PER_CLUSTER];
- struct page *cached_page = NULL;
- VCN last_vcn;
- LCN lcn;
- size_t bytes;
- ssize_t status, written = 0;
- unsigned nr_pages;
-
- ntfs_debug("Entering for i_ino 0x%lx, attribute type 0x%x, pos "
- "0x%llx, count 0x%lx.", vi->i_ino,
- (unsigned)le32_to_cpu(ni->type),
- (unsigned long long)pos,
- (unsigned long)iov_iter_count(i));
+ struct inode *inode = d_backing_inode(path->dentry);
+ struct ntfs_inode *ni = NTFS_I(inode);
+
+ generic_fillattr(idmap, request_mask, inode, stat);
+
+ stat->blksize = NTFS_SB(inode->i_sb)->cluster_size;
+ stat->blocks = (((u64)NTFS_I(inode)->i_dealloc_clusters <<
+ NTFS_SB(inode->i_sb)->cluster_size_bits) >> 9) + inode->i_blocks;
+ stat->result_mask |= STATX_BTIME;
+ stat->btime = NTFS_I(inode)->i_crtime;
+
+ if (NInoCompressed(ni))
+ stat->attributes |= STATX_ATTR_COMPRESSED;
+
+ if (NInoEncrypted(ni))
+ stat->attributes |= STATX_ATTR_ENCRYPTED;
+
+ if (inode->i_flags & S_IMMUTABLE)
+ stat->attributes |= STATX_ATTR_IMMUTABLE;
+
+ if (inode->i_flags & S_APPEND)
+ stat->attributes |= STATX_ATTR_APPEND;
+
+ stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED |
+ STATX_ATTR_IMMUTABLE | STATX_ATTR_APPEND;
+
/*
- * If a previous ntfs_truncate() failed, repeat it and abort if it
- * fails again.
+ * If it's a compressed or encrypted file, NTFS currently
+ * does not support DIO. For normal files, we report the bdev
+ * logical block size.
*/
- if (unlikely(NInoTruncateFailed(ni))) {
- int err;
+ if (request_mask & STATX_DIOALIGN && S_ISREG(inode->i_mode)) {
+ unsigned int align =
+ bdev_logical_block_size(inode->i_sb->s_bdev);

- inode_dio_wait(vi);
- err = ntfs_truncate(vi);
- if (err || NInoTruncateFailed(ni)) {
- if (!err)
- err = -EIO;
- ntfs_error(vol->sb, "Cannot perform write to inode "
- "0x%lx, attribute type 0x%x, because "
- "ntfs_truncate() failed (error code "
- "%i).", vi->i_ino,
- (unsigned)le32_to_cpu(ni->type), err);
- return err;
+ stat->result_mask |= STATX_DIOALIGN;
+ if (!NInoCompressed(ni) && !NInoEncrypted(ni)) {
+ stat->dio_mem_align = align;
+ stat->dio_offset_align = align;
}
}
- /*
- * Determine the number of pages per cluster for non-resident
- * attributes.
- */
- nr_pages = 1;
- if (vol->cluster_size > PAGE_SIZE && NInoNonResident(ni))
- nr_pages = vol->cluster_size >> PAGE_SHIFT;
- last_vcn = -1;
- do {
- VCN vcn;
- pgoff_t start_idx;
- unsigned ofs, do_pages, u;
- size_t copied;
-
- start_idx = pos >> PAGE_SHIFT;
- ofs = pos & ~PAGE_MASK;
- bytes = PAGE_SIZE - ofs;
- do_pages = 1;
- if (nr_pages > 1) {
- vcn = pos >> vol->cluster_size_bits;
- if (vcn != last_vcn) {
- last_vcn = vcn;
- /*
- * Get the lcn of the vcn the write is in. If
- * it is a hole, need to lock down all pages in
- * the cluster.
- */
- down_read(&ni->runlist.lock);
- lcn = ntfs_attr_vcn_to_lcn_nolock(ni, pos >>
- vol->cluster_size_bits, false);
- up_read(&ni->runlist.lock);
- if (unlikely(lcn < LCN_HOLE)) {
- if (lcn == LCN_ENOMEM)
- status = -ENOMEM;
- else {
- status = -EIO;
- ntfs_error(vol->sb, "Cannot "
- "perform write to "
- "inode 0x%lx, "
- "attribute type 0x%x, "
- "because the attribute "
- "is corrupt.",
- vi->i_ino, (unsigned)
- le32_to_cpu(ni->type));
- }
- break;
- }
- if (lcn == LCN_HOLE) {
- start_idx = (pos & ~(s64)
- vol->cluster_size_mask)
- >> PAGE_SHIFT;
- bytes = vol->cluster_size - (pos &
- vol->cluster_size_mask);
- do_pages = nr_pages;
- }
- }
- }
- if (bytes > iov_iter_count(i))
- bytes = iov_iter_count(i);
-again:
- /*
- * Bring in the user page(s) that we will copy from _first_.
- * Otherwise there is a nasty deadlock on copying from the same
- * page(s) as we are writing to, without it/them being marked
- * up-to-date. Note, at present there is nothing to stop the
- * pages being swapped out between us bringing them into memory
- * and doing the actual copying.
- */
- if (unlikely(fault_in_iov_iter_readable(i, bytes))) {
- status = -EFAULT;
- break;
- }
- /* Get and lock @do_pages starting at index @start_idx. */
- status = __ntfs_grab_cache_pages(mapping, start_idx, do_pages,
- pages, &cached_page);
- if (unlikely(status))
- break;
- /*
- * For non-resident attributes, we need to fill any holes with
- * actual clusters and ensure all bufferes are mapped. We also
- * need to bring uptodate any buffers that are only partially
- * being written to.
- */
- if (NInoNonResident(ni)) {
- status = ntfs_prepare_pages_for_non_resident_write(
- pages, do_pages, pos, bytes);
- if (unlikely(status)) {
- do {
- unlock_page(pages[--do_pages]);
- put_page(pages[do_pages]);
- } while (do_pages);
- break;
- }
- }
- u = (pos >> PAGE_SHIFT) - pages[0]->index;
- copied = ntfs_copy_from_user_iter(pages + u, do_pages - u, ofs,
- i, bytes);
- ntfs_flush_dcache_pages(pages + u, do_pages - u);
- status = 0;
- if (likely(copied == bytes)) {
- status = ntfs_commit_pages_after_write(pages, do_pages,
- pos, bytes);
+
+ return 0;
+}
+
+static loff_t ntfs_file_llseek(struct file *file, loff_t offset, int whence)
+{
+ struct inode *inode = file->f_mapping->host;
+
+ switch (whence) {
+ case SEEK_HOLE:
+ inode_lock_shared(inode);
+ offset = iomap_seek_hole(inode, offset, &ntfs_seek_iomap_ops);
+ inode_unlock_shared(inode);
+ break;
+ case SEEK_DATA:
+ inode_lock_shared(inode);
+ offset = iomap_seek_data(inode, offset, &ntfs_seek_iomap_ops);
+ inode_unlock_shared(inode);
+ break;
+ default:
+ return generic_file_llseek_size(file, offset, whence,
+ inode->i_sb->s_maxbytes,
+ i_size_read(inode));
+ }
+ if (offset < 0)
+ return offset;
+ return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+}
+
+static ssize_t ntfs_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
+{
+ struct inode *vi = file_inode(iocb->ki_filp);
+ struct super_block *sb = vi->i_sb;
+ ssize_t ret;
+
+ if (NVolShutdown(NTFS_SB(sb)))
+ return -EIO;
+
+ if (NInoCompressed(NTFS_I(vi)) && iocb->ki_flags & IOCB_DIRECT)
+ return -EOPNOTSUPP;
+
+ inode_lock_shared(vi);
+
+ if (iocb->ki_flags & IOCB_DIRECT) {
+ size_t count = iov_iter_count(to);
+
+ if ((iocb->ki_pos | count) & (sb->s_blocksize - 1)) {
+ ret = -EINVAL;
+ goto inode_unlock;
}
- do {
- unlock_page(pages[--do_pages]);
- put_page(pages[do_pages]);
- } while (do_pages);
- if (unlikely(status < 0)) {
- iov_iter_revert(i, copied);
- break;
+
+ file_accessed(iocb->ki_filp);
+ ret = iomap_dio_rw(iocb, to, &ntfs_read_iomap_ops, NULL, 0,
+ NULL, 0);
+ } else {
+ ret = generic_file_read_iter(iocb, to);
+ }
+
+inode_unlock:
+ inode_unlock_shared(vi);
+
+ return ret;
+}
+
+static int ntfs_file_write_dio_end_io(struct kiocb *iocb, ssize_t size,
+ int error, unsigned int flags)
+{
+ struct inode *inode = file_inode(iocb->ki_filp);
+
+ if (error)
+ return error;
+
+ if (size) {
+ if (i_size_read(inode) < iocb->ki_pos + size) {
+ i_size_write(inode, iocb->ki_pos + size);
+ mark_inode_dirty(inode);
}
- cond_resched();
- if (unlikely(copied < bytes)) {
- iov_iter_revert(i, copied);
- if (copied)
- bytes = copied;
- else if (bytes > PAGE_SIZE - ofs)
- bytes = PAGE_SIZE - ofs;
- goto again;
+ }
+
+ return 0;
+}
+
+static const struct iomap_dio_ops ntfs_write_dio_ops = {
+ .end_io = ntfs_file_write_dio_end_io,
+};
+
+static ssize_t ntfs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+ ssize_t ret;
+
+ ret = iomap_dio_rw(iocb, from, &ntfs_dio_iomap_ops,
+ &ntfs_write_dio_ops, 0, NULL, 0);
+ if (ret == -ENOTBLK)
+ ret = 0;
+ else if (ret < 0)
+ goto out;
+
+ if (iov_iter_count(from)) {
+ loff_t offset, end;
+ ssize_t written;
+ int ret2;
+
+ offset = iocb->ki_pos;
+ iocb->ki_flags &= ~IOCB_DIRECT;
+ written = iomap_file_buffered_write(iocb, from,
+ &ntfs_write_iomap_ops, &ntfs_iomap_folio_ops,
+ NULL);
+ if (written < 0) {
+ ret = written;
+ goto out;
}
- pos += copied;
- written += copied;
- balance_dirty_pages_ratelimited(mapping);
- if (fatal_signal_pending(current)) {
- status = -EINTR;
- break;
+
+ ret += written;
+ end = iocb->ki_pos + written - 1;
+ ret2 = filemap_write_and_wait_range(iocb->ki_filp->f_mapping,
+ offset, end);
+ if (ret2) {
+ ret = -EIO;
+ goto out;
}
- } while (iov_iter_count(i));
- if (cached_page)
- put_page(cached_page);
- ntfs_debug("Done. Returning %s (written 0x%lx, status %li).",
- written ? "written" : "status", (unsigned long)written,
- (long)status);
- return written ? written : status;
+ if (!ret2)
+ invalidate_mapping_pages(iocb->ki_filp->f_mapping,
+ offset >> PAGE_SHIFT,
+ end >> PAGE_SHIFT);
+ }
+
+out:
+ return ret;
}

-/**
- * ntfs_file_write_iter - simple wrapper for ntfs_file_write_iter_nolock()
- * @iocb: IO state structure
- * @from: iov_iter with data to write
- *
- * Basically the same as generic_file_write_iter() except that it ends up
- * up calling ntfs_perform_write() instead of generic_perform_write() and that
- * O_DIRECT is not implemented.
- */
static ssize_t ntfs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
{
struct file *file = iocb->ki_filp;
- struct inode *vi = file_inode(file);
- ssize_t written = 0;
- ssize_t err;
+ struct inode *vi = file->f_mapping->host;
+ struct ntfs_inode *ni = NTFS_I(vi);
+ struct ntfs_volume *vol = ni->vol;
+ ssize_t ret;
+ ssize_t count;
+ loff_t pos;
+ int err;
+ loff_t old_data_size, old_init_size;

- inode_lock(vi);
- /* We can write back this queue in page reclaim. */
- err = ntfs_prepare_file_for_write(iocb, from);
- if (iov_iter_count(from) && !err)
- written = ntfs_perform_write(file, from, iocb->ki_pos);
+ if (NVolShutdown(vol))
+ return -EIO;
+
+ if (NInoEncrypted(ni)) {
+ ntfs_error(vi->i_sb, "Writing for %s files is not supported yet",
+ NInoCompressed(ni) ? "Compressed" : "Encrypted");
+ return -EOPNOTSUPP;
+ }
+
+ if (NInoCompressed(ni) && iocb->ki_flags & IOCB_DIRECT)
+ return -EOPNOTSUPP;
+
+ if (iocb->ki_flags & IOCB_NOWAIT) {
+ if (!inode_trylock(vi))
+ return -EAGAIN;
+ } else
+ inode_lock(vi);
+
+ ret = generic_write_checks(iocb, from);
+ if (ret <= 0)
+ goto out_lock;
+
+ err = file_modified(iocb->ki_filp);
+ if (err) {
+ ret = err;
+ goto out_lock;
+ }
+
+ if (!(vol->vol_flags & VOLUME_IS_DIRTY))
+ ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY);
+
+ pos = iocb->ki_pos;
+ count = ret;
+
+ old_data_size = ni->data_size;
+ old_init_size = ni->initialized_size;
+
+ if (NInoNonResident(ni) && NInoCompressed(ni)) {
+ ret = ntfs_compress_write(ni, pos, count, from);
+ if (ret > 0)
+ iocb->ki_pos += ret;
+ goto out;
+ }
+
+ if (NInoNonResident(ni) && iocb->ki_flags & IOCB_DIRECT)
+ ret = ntfs_dio_write_iter(iocb, from);
+ else
+ ret = iomap_file_buffered_write(iocb, from, &ntfs_write_iomap_ops,
+ &ntfs_iomap_folio_ops, NULL);
+out:
+ if (ret < 0 && ret != -EIOCBQUEUED) {
+ if (ni->initialized_size != old_init_size) {
+ mutex_lock(&ni->mrec_lock);
+ ntfs_attr_set_initialized_size(ni, old_init_size);
+ mutex_unlock(&ni->mrec_lock);
+ }
+ if (ni->data_size != old_data_size) {
+ truncate_setsize(vi, old_data_size);
+ ntfs_attr_truncate(ni, old_data_size);
+ }
+ }
+out_lock:
inode_unlock(vi);
- iocb->ki_pos += written;
- if (likely(written > 0))
- written = generic_write_sync(iocb, written);
- return written ? written : err;
+ if (ret > 0)
+ ret = generic_write_sync(iocb, ret);
+ return ret;
}

-/**
- * ntfs_file_fsync - sync a file to disk
- * @filp: file to be synced
- * @datasync: if non-zero only flush user data and not metadata
- *
- * Data integrity sync of a file to disk. Used for fsync, fdatasync, and msync
- * system calls. This function is inspired by fs/buffer.c::file_fsync().
- *
- * If @datasync is false, write the mft record and all associated extent mft
- * records as well as the $DATA attribute and then sync the block device.
- *
- * If @datasync is true and the attribute is non-resident, we skip the writing
- * of the mft record and all associated extent mft records (this might still
- * happen due to the write_inode_now() call).
- *
- * Also, if @datasync is true, we do not wait on the inode to be written out
- * but we always wait on the page cache pages to be written out.
- *
- * Locking: Caller must hold i_mutex on the inode.
- *
- * TODO: We should probably also write all attribute/index inodes associated
- * with this inode but since we have no simple way of getting to them we ignore
- * this problem for now.
- */
-static int ntfs_file_fsync(struct file *filp, loff_t start, loff_t end,
- int datasync)
+static vm_fault_t ntfs_filemap_page_mkwrite(struct vm_fault *vmf)
{
- struct inode *vi = filp->f_mapping->host;
- int err, ret = 0;
+ struct inode *inode = file_inode(vmf->vma->vm_file);
+ vm_fault_t ret;

- ntfs_debug("Entering for inode 0x%lx.", vi->i_ino);
+ sb_start_pagefault(inode->i_sb);
+ file_update_time(vmf->vma->vm_file);

- err = file_write_and_wait_range(filp, start, end);
- if (err)
+ ret = iomap_page_mkwrite(vmf, &ntfs_page_mkwrite_iomap_ops, NULL);
+ sb_end_pagefault(inode->i_sb);
+ return ret;
+}
+
+static const struct vm_operations_struct ntfs_file_vm_ops = {
+ .fault = filemap_fault,
+ .map_pages = filemap_map_pages,
+ .page_mkwrite = ntfs_filemap_page_mkwrite,
+};
+
+static int ntfs_file_mmap_prepare(struct vm_area_desc *desc)
+{
+ struct file *file = desc->file;
+ struct inode *inode = file_inode(file);
+
+ if (NVolShutdown(NTFS_SB(file->f_mapping->host->i_sb)))
+ return -EIO;
+
+ if (NInoCompressed(NTFS_I(inode)))
+ return -EOPNOTSUPP;
+
+ if (desc->vm_flags & VM_WRITE) {
+ struct inode *inode = file_inode(file);
+ loff_t from, to;
+ int err;
+
+ from = ((loff_t)desc->pgoff << PAGE_SHIFT);
+ to = min_t(loff_t, i_size_read(inode),
+ from + desc->end - desc->start);
+
+ if (NTFS_I(inode)->initialized_size < to) {
+ err = ntfs_extend_initialized_size(inode, to, to, false);
+ if (err)
+ return err;
+ }
+ }
+
+
+ file_accessed(file);
+ desc->vm_ops = &ntfs_file_vm_ops;
+ return 0;
+}
+
+static int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+ u64 start, u64 len)
+{
+ return iomap_fiemap(inode, fieinfo, start, len, &ntfs_read_iomap_ops);
+}
+
+static const char *ntfs_get_link(struct dentry *dentry, struct inode *inode,
+ struct delayed_call *done)
+{
+ if (!NTFS_I(inode)->target)
+ return ERR_PTR(-EINVAL);
+
+ return NTFS_I(inode)->target;
+}
+
+static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos,
+ struct pipe_inode_info *pipe, size_t len, unsigned int flags)
+{
+ if (NVolShutdown(NTFS_SB(in->f_mapping->host->i_sb)))
+ return -EIO;
+
+ return filemap_splice_read(in, ppos, pipe, len, flags);
+}
+
+static int ntfs_ioctl_shutdown(struct super_block *sb, unsigned long arg)
+{
+ u32 flags;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ if (get_user(flags, (__u32 __user *)arg))
+ return -EFAULT;
+
+ return ntfs_force_shutdown(sb, flags);
+}
+
+static int ntfs_ioctl_get_volume_label(struct file *filp, unsigned long arg)
+{
+ struct ntfs_volume *vol = NTFS_SB(file_inode(filp)->i_sb);
+ char __user *buf = (char __user *)arg;
+
+ if (!vol->volume_label) {
+ if (copy_to_user(buf, "", 1))
+ return -EFAULT;
+ } else if (copy_to_user(buf, vol->volume_label,
+ MIN(FSLABEL_MAX, strlen(vol->volume_label) + 1)))
+ return -EFAULT;
+ return 0;
+}
+
+static int ntfs_ioctl_set_volume_label(struct file *filp, unsigned long arg)
+{
+ struct ntfs_volume *vol = NTFS_SB(file_inode(filp)->i_sb);
+ char *label;
+ int ret;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ label = strndup_user((const char __user *)arg, FSLABEL_MAX);
+ if (IS_ERR(label))
+ return PTR_ERR(label);
+
+ ret = mnt_want_write_file(filp);
+ if (ret)
+ goto out;
+
+ ret = ntfs_write_volume_label(vol, label);
+ mnt_drop_write_file(filp);
+out:
+ kfree(label);
+ return ret;
+}
+
+static int ntfs_ioctl_fitrim(struct ntfs_volume *vol, unsigned long arg)
+{
+ struct fstrim_range __user *user_range;
+ struct fstrim_range range;
+ struct block_device *dev;
+ int err;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+
+ dev = vol->sb->s_bdev;
+ if (!bdev_max_discard_sectors(dev))
+ return -EOPNOTSUPP;
+
+ user_range = (struct fstrim_range __user *)arg;
+ if (copy_from_user(&range, user_range, sizeof(range)))
+ return -EFAULT;
+
+ if (range.len == 0)
+ return -EINVAL;
+
+ if (range.len < vol->cluster_size)
+ return -EINVAL;
+
+ range.minlen = max_t(u32, range.minlen, bdev_discard_granularity(dev));
+
+ err = ntfs_trim_fs(vol, &range);
+ if (err < 0)
return err;
- inode_lock(vi);

- BUG_ON(S_ISDIR(vi->i_mode));
- if (!datasync || !NInoNonResident(NTFS_I(vi)))
- ret = __ntfs_write_inode(vi, 1);
- write_inode_now(vi, !datasync);
- /*
- * NOTE: If we were to use mapping->private_list (see ext2 and
- * fs/buffer.c) for dirty blocks then we could optimize the below to be
- * sync_mapping_buffers(vi->i_mapping).
- */
- err = sync_blockdev(vi->i_sb->s_bdev);
- if (unlikely(err && !ret))
- ret = err;
- if (likely(!ret))
- ntfs_debug("Done.");
+ if (copy_to_user(user_range, &range, sizeof(range)))
+ return -EFAULT;
+
+ return 0;
+}
+
+long ntfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case FS_IOC_SHUTDOWN:
+ return ntfs_ioctl_shutdown(file_inode(filp)->i_sb, arg);
+ case FS_IOC_GETFSLABEL:
+ return ntfs_ioctl_get_volume_label(filp, arg);
+ case FS_IOC_SETFSLABEL:
+ return ntfs_ioctl_set_volume_label(filp, arg);
+ case FITRIM:
+ return ntfs_ioctl_fitrim(NTFS_SB(file_inode(filp)->i_sb), arg);
+ default:
+ return -ENOTTY;
+ }
+}
+
+#ifdef CONFIG_COMPAT
+long ntfs_compat_ioctl(struct file *filp, unsigned int cmd,
+ unsigned long arg)
+{
+ return ntfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
+}
+#endif
+
+static int ntfs_allocate_range(struct ntfs_inode *ni, int mode, loff_t offset,
+ loff_t len)
+{
+ struct inode *vi = VFS_I(ni);
+ struct ntfs_volume *vol = ni->vol;
+ s64 need_space;
+ loff_t old_size, new_size;
+ s64 start_vcn, end_vcn;
+ int err;
+
+ old_size = i_size_read(vi);
+ new_size = max_t(loff_t, old_size, offset + len);
+ start_vcn = ntfs_bytes_to_cluster(vol, offset);
+ end_vcn = ntfs_bytes_to_cluster(vol, offset + len - 1) + 1;
+
+ err = inode_newsize_ok(vi, new_size);
+ if (err)
+ goto out;
+
+ need_space = ntfs_bytes_to_cluster(vol, ni->allocated_size);
+ if (need_space > start_vcn)
+ need_space = end_vcn - need_space;
else
- ntfs_warning(vi->i_sb, "Failed to f%ssync inode 0x%lx. Error "
- "%u.", datasync ? "data" : "", vi->i_ino, -ret);
- inode_unlock(vi);
- return ret;
+ need_space = end_vcn - start_vcn;
+ if (need_space > 0 &&
+ need_space > (atomic64_read(&vol->free_clusters) -
+ atomic64_read(&vol->dirty_clusters))) {
+ err = -ENOSPC;
+ goto out;
+ }
+
+ err = ntfs_attr_fallocate(ni, offset, len,
+ mode & FALLOC_FL_KEEP_SIZE ? true : false);
+
+ if (!(mode & FALLOC_FL_KEEP_SIZE) && new_size != old_size)
+ i_size_write(vi, ni->data_size);
+out:
+ return err;
+}
+
+static int ntfs_punch_hole(struct ntfs_inode *ni, int mode, loff_t offset,
+ loff_t len)
+{
+ struct ntfs_volume *vol = ni->vol;
+ struct inode *vi = VFS_I(ni);
+ loff_t end_offset;
+ s64 start_vcn, end_vcn;
+ int err = 0;
+
+ loff_t offset_down = round_down(offset, max_t(unsigned int,
+ vol->cluster_size, PAGE_SIZE));
+
+ if (NVolDisableSparse(vol)) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (offset >= ni->data_size)
+ goto out;
+
+ if (offset + len > ni->data_size)
+ end_offset = ni->data_size;
+ else
+ end_offset = offset + len;
+
+ err = filemap_write_and_wait_range(vi->i_mapping, offset_down, LLONG_MAX);
+ if (err)
+ goto out;
+ truncate_pagecache(vi, offset_down);
+
+ start_vcn = ntfs_bytes_to_cluster(vol, offset);
+ end_vcn = ntfs_bytes_to_cluster(vol, end_offset - 1) + 1;
+
+ if (offset & vol->cluster_size_mask) {
+ loff_t to;
+
+ to = min_t(loff_t, ntfs_cluster_to_bytes(vol, start_vcn + 1),
+ end_offset);
+ err = iomap_zero_range(vi, offset, to - offset, NULL,
+ &ntfs_seek_iomap_ops,
+ &ntfs_iomap_folio_ops, NULL);
+ if (err < 0 || (end_vcn - start_vcn) == 1)
+ goto out;
+ start_vcn++;
+ }
+
+ if (end_offset & vol->cluster_size_mask) {
+ loff_t from;
+
+ from = ntfs_cluster_to_bytes(vol, end_vcn - 1);
+ err = iomap_zero_range(vi, from, end_offset - from, NULL,
+ &ntfs_seek_iomap_ops,
+ &ntfs_iomap_folio_ops, NULL);
+ if (err < 0 || (end_vcn - start_vcn) == 1)
+ goto out;
+ end_vcn--;
+ }
+
+ mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+ err = ntfs_non_resident_attr_punch_hole(ni, start_vcn,
+ end_vcn - start_vcn);
+ mutex_unlock(&ni->mrec_lock);
+out:
+ return err;
}

-#endif /* NTFS_RW */
+static int ntfs_collapse_range(struct ntfs_inode *ni, loff_t offset, loff_t len)
+{
+ struct ntfs_volume *vol = ni->vol;
+ struct inode *vi = VFS_I(ni);
+ loff_t old_size, new_size;
+ s64 start_vcn, end_vcn;
+ int err;
+
+ loff_t offset_down = round_down(offset,
+ max_t(unsigned long, vol->cluster_size, PAGE_SIZE));
+
+ if ((offset & vol->cluster_size_mask) ||
+ (len & vol->cluster_size_mask) ||
+ offset >= ni->allocated_size) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ old_size = i_size_read(vi);
+ start_vcn = ntfs_bytes_to_cluster(vol, offset);
+ end_vcn = ntfs_bytes_to_cluster(vol, offset + len - 1) + 1;
+
+ if (ntfs_cluster_to_bytes(vol, end_vcn) > ni->allocated_size)
+ end_vcn = (round_up(ni->allocated_size - 1,
+ vol->cluster_size) >> vol->cluster_size_bits) + 1;
+ new_size = old_size - ntfs_cluster_to_bytes(vol, end_vcn - start_vcn);
+ if (new_size < 0)
+ new_size = 0;
+ err = filemap_write_and_wait_range(vi->i_mapping,
+ offset_down, LLONG_MAX);
+ if (err)
+ goto out;
+
+ truncate_pagecache(vi, offset_down);
+
+ mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+ err = ntfs_non_resident_attr_collapse_range(ni, start_vcn,
+ end_vcn - start_vcn);
+ mutex_unlock(&ni->mrec_lock);
+
+ if (new_size != old_size)
+ i_size_write(vi, ni->data_size);
+out:
+ return err;
+}
+
+static int ntfs_insert_range(struct ntfs_inode *ni, loff_t offset, loff_t len)
+{
+ struct ntfs_volume *vol = ni->vol;
+ struct inode *vi = VFS_I(ni);
+ loff_t offset_down = round_down(offset,
+ max_t(unsigned long, vol->cluster_size, PAGE_SIZE));
+ loff_t alloc_size, end_offset = offset + len;
+ loff_t old_size, new_size;
+ s64 start_vcn, end_vcn;
+ int err;
+
+ if (NVolDisableSparse(vol)) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if ((offset & vol->cluster_size_mask) ||
+ (len & vol->cluster_size_mask) ||
+ offset >= ni->allocated_size) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ old_size = i_size_read(vi);
+ start_vcn = ntfs_bytes_to_cluster(vol, offset);
+ end_vcn = ntfs_bytes_to_cluster(vol, end_offset - 1) + 1;
+
+ new_size = old_size + ntfs_cluster_to_bytes(vol, end_vcn - start_vcn);
+ alloc_size = ni->allocated_size +
+ ntfs_cluster_to_bytes(vol, end_vcn - start_vcn);
+ if (alloc_size < 0) {
+ err = -EFBIG;
+ goto out;
+ }
+ err = inode_newsize_ok(vi, alloc_size);
+ if (err)
+ goto out;
+
+ err = filemap_write_and_wait_range(vi->i_mapping,
+ offset_down, LLONG_MAX);
+ if (err)
+ goto out;
+
+ truncate_pagecache(vi, offset_down);
+
+ mutex_lock_nested(&ni->mrec_lock, NTFS_INODE_MUTEX_NORMAL);
+ err = ntfs_non_resident_attr_insert_range(ni, start_vcn,
+ end_vcn - start_vcn);
+ mutex_unlock(&ni->mrec_lock);
+
+ if (new_size != old_size)
+ i_size_write(vi, ni->data_size);
+out:
+ return err;
+}
+
+#define NTFS_FALLOC_FL_SUPPORTED \
+ (FALLOC_FL_ALLOCATE_RANGE | FALLOC_FL_KEEP_SIZE | \
+ FALLOC_FL_INSERT_RANGE | FALLOC_FL_PUNCH_HOLE | \
+ FALLOC_FL_COLLAPSE_RANGE)
+
+static long ntfs_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
+{
+ struct inode *vi = file_inode(file);
+ struct ntfs_inode *ni = NTFS_I(vi);
+ struct ntfs_volume *vol = ni->vol;
+ int err = 0;
+ loff_t old_size;
+ bool map_locked = false;
+
+ if (mode & ~(NTFS_FALLOC_FL_SUPPORTED))
+ return -EOPNOTSUPP;
+
+ if (!NVolFreeClusterKnown(vol))
+ wait_event(vol->free_waitq, NVolFreeClusterKnown(vol));
+
+ if ((ni->vol->mft_zone_end - ni->vol->mft_zone_start) == 0)
+ return -ENOSPC;
+
+ if (NInoNonResident(ni) && !NInoFullyMapped(ni)) {
+ down_write(&ni->runlist.lock);
+ err = ntfs_attr_map_whole_runlist(ni);
+ up_write(&ni->runlist.lock);
+ if (err)
+ return err;
+ }
+
+ if (!(vol->vol_flags & VOLUME_IS_DIRTY)) {
+ err = ntfs_set_volume_flags(vol, VOLUME_IS_DIRTY);
+ if (err)
+ return err;
+ }
+
+ old_size = i_size_read(vi);
+
+ inode_lock(vi);
+ if (NInoCompressed(ni) || NInoEncrypted(ni)) {
+ err = -EOPNOTSUPP;
+ goto out;
+ }
+
+ inode_dio_wait(vi);
+ if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE |
+ FALLOC_FL_INSERT_RANGE)) {
+ filemap_invalidate_lock(vi->i_mapping);
+ map_locked = true;
+ }
+
+ switch (mode & FALLOC_FL_MODE_MASK) {
+ case FALLOC_FL_ALLOCATE_RANGE:
+ case FALLOC_FL_KEEP_SIZE:
+ err = ntfs_allocate_range(ni, mode, offset, len);
+ break;
+ case FALLOC_FL_PUNCH_HOLE:
+ err = ntfs_punch_hole(ni, mode, offset, len);
+ break;
+ case FALLOC_FL_COLLAPSE_RANGE:
+ err = ntfs_collapse_range(ni, offset, len);
+ break;
+ case FALLOC_FL_INSERT_RANGE:
+ err = ntfs_insert_range(ni, offset, len);
+ break;
+ default:
+ err = -EOPNOTSUPP;
+ }
+
+ if (err)
+ goto out;
+
+ err = file_modified(file);
+out:
+ if (map_locked)
+ filemap_invalidate_unlock(vi->i_mapping);
+ if (!err) {
+ if (mode == 0 && NInoNonResident(ni) &&
+ offset > old_size && old_size % PAGE_SIZE != 0) {
+ loff_t len = min_t(loff_t,
+ round_up(old_size, PAGE_SIZE) - old_size,
+ offset - old_size);
+ err = iomap_zero_range(vi, old_size, len, NULL,
+ &ntfs_seek_iomap_ops,
+ &ntfs_iomap_folio_ops, NULL);
+ }
+ NInoSetFileNameDirty(ni);
+ inode_set_mtime_to_ts(vi, inode_set_ctime_current(vi));
+ mark_inode_dirty(vi);
+ }
+
+ inode_unlock(vi);
+ return err;
+}

const struct file_operations ntfs_file_ops = {
- .llseek = generic_file_llseek,
- .read_iter = generic_file_read_iter,
-#ifdef NTFS_RW
+ .llseek = ntfs_file_llseek,
+ .read_iter = ntfs_file_read_iter,
.write_iter = ntfs_file_write_iter,
.fsync = ntfs_file_fsync,
-#endif /* NTFS_RW */
- .mmap = generic_file_mmap,
+ .mmap_prepare = ntfs_file_mmap_prepare,
.open = ntfs_file_open,
- .splice_read = filemap_splice_read,
+ .release = ntfs_file_release,
+ .splice_read = ntfs_file_splice_read,
+ .splice_write = iter_file_splice_write,
+ .unlocked_ioctl = ntfs_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = ntfs_compat_ioctl,
+#endif
+ .fallocate = ntfs_fallocate,
+ .setlease = generic_setlease,
};

const struct inode_operations ntfs_file_inode_ops = {
-#ifdef NTFS_RW
.setattr = ntfs_setattr,
-#endif /* NTFS_RW */
+ .getattr = ntfs_getattr,
+ .listxattr = ntfs_listxattr,
+ .get_acl = ntfs_get_acl,
+ .set_acl = ntfs_set_acl,
+ .fiemap = ntfs_fiemap,
+};
+
+const struct inode_operations ntfs_symlink_inode_operations = {
+ .get_link = ntfs_get_link,
+ .setattr = ntfs_setattr,
+ .listxattr = ntfs_listxattr,
+};
+
+const struct inode_operations ntfs_special_inode_operations = {
+ .setattr = ntfs_setattr,
+ .getattr = ntfs_getattr,
+ .listxattr = ntfs_listxattr,
+ .get_acl = ntfs_get_acl,
+ .set_acl = ntfs_set_acl,
};

const struct file_operations ntfs_empty_file_ops = {};
--
2.25.1