| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * |
| * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved. |
| * |
| * Regular file handling primitives for NTFS-based filesystems. |
| * |
| */ |
| |
| #include <linux/backing-dev.h> |
| #include <linux/blkdev.h> |
| #include <linux/buffer_head.h> |
| #include <linux/compat.h> |
| #include <linux/falloc.h> |
| #include <linux/fiemap.h> |
| #include <linux/fileattr.h> |
| |
| #include "debug.h" |
| #include "ntfs.h" |
| #include "ntfs_fs.h" |
| |
| static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, 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 = sbi->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; |
| |
| range.minlen = max_t(u32, range.minlen, bdev_discard_granularity(dev)); |
| |
| err = ntfs_trim_fs(sbi, &range); |
| if (err < 0) |
| return err; |
| |
| if (copy_to_user(user_range, &range, sizeof(range))) |
| return -EFAULT; |
| |
| return 0; |
| } |
| |
| /* |
| * ntfs_fileattr_get - inode_operations::fileattr_get |
| */ |
| int ntfs_fileattr_get(struct dentry *dentry, struct fileattr *fa) |
| { |
| struct inode *inode = d_inode(dentry); |
| struct ntfs_inode *ni = ntfs_i(inode); |
| u32 flags = 0; |
| |
| if (inode->i_flags & S_IMMUTABLE) |
| flags |= FS_IMMUTABLE_FL; |
| |
| if (inode->i_flags & S_APPEND) |
| flags |= FS_APPEND_FL; |
| |
| if (is_compressed(ni)) |
| flags |= FS_COMPR_FL; |
| |
| if (is_encrypted(ni)) |
| flags |= FS_ENCRYPT_FL; |
| |
| fileattr_fill_flags(fa, flags); |
| |
| return 0; |
| } |
| |
| /* |
| * ntfs_fileattr_set - inode_operations::fileattr_set |
| */ |
| int ntfs_fileattr_set(struct mnt_idmap *idmap, struct dentry *dentry, |
| struct fileattr *fa) |
| { |
| struct inode *inode = d_inode(dentry); |
| u32 flags = fa->flags; |
| unsigned int new_fl = 0; |
| |
| if (fileattr_has_fsx(fa)) |
| return -EOPNOTSUPP; |
| |
| if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL)) |
| return -EOPNOTSUPP; |
| |
| if (flags & FS_IMMUTABLE_FL) |
| new_fl |= S_IMMUTABLE; |
| |
| if (flags & FS_APPEND_FL) |
| new_fl |= S_APPEND; |
| |
| inode_set_flags(inode, new_fl, S_IMMUTABLE | S_APPEND); |
| |
| inode_set_ctime_current(inode); |
| mark_inode_dirty(inode); |
| |
| return 0; |
| } |
| |
| /* |
| * ntfs_ioctl - file_operations::unlocked_ioctl |
| */ |
| long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg) |
| { |
| struct inode *inode = file_inode(filp); |
| struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
| |
| switch (cmd) { |
| case FITRIM: |
| return ntfs_ioctl_fitrim(sbi, arg); |
| } |
| return -ENOTTY; /* Inappropriate ioctl for device. */ |
| } |
| |
| #ifdef CONFIG_COMPAT |
| long ntfs_compat_ioctl(struct file *filp, u32 cmd, unsigned long arg) |
| |
| { |
| return ntfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); |
| } |
| #endif |
| |
| /* |
| * ntfs_getattr - inode_operations::getattr |
| */ |
| int ntfs_getattr(struct mnt_idmap *idmap, const struct path *path, |
| struct kstat *stat, u32 request_mask, u32 flags) |
| { |
| struct inode *inode = d_inode(path->dentry); |
| struct ntfs_inode *ni = ntfs_i(inode); |
| |
| stat->result_mask |= STATX_BTIME; |
| stat->btime = ni->i_crtime; |
| stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */ |
| |
| if (inode->i_flags & S_IMMUTABLE) |
| stat->attributes |= STATX_ATTR_IMMUTABLE; |
| |
| if (inode->i_flags & S_APPEND) |
| stat->attributes |= STATX_ATTR_APPEND; |
| |
| if (is_compressed(ni)) |
| stat->attributes |= STATX_ATTR_COMPRESSED; |
| |
| if (is_encrypted(ni)) |
| stat->attributes |= STATX_ATTR_ENCRYPTED; |
| |
| stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED | |
| STATX_ATTR_IMMUTABLE | STATX_ATTR_APPEND; |
| |
| generic_fillattr(idmap, request_mask, inode, stat); |
| |
| return 0; |
| } |
| |
| 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; |
| int err; |
| |
| if (is_resident(ni)) { |
| ni->i_valid = new_valid; |
| return 0; |
| } |
| |
| WARN_ON(is_compressed(ni)); |
| WARN_ON(valid >= new_valid); |
| |
| for (;;) { |
| u32 zerofrom, len; |
| struct page *page; |
| 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(file, mapping, pos, len, &page, NULL); |
| if (err) |
| goto out; |
| |
| zero_user_segment(page, zerofrom, PAGE_SIZE); |
| |
| /* This function in any case puts page. */ |
| err = ntfs_write_end(file, mapping, pos, len, len, page, NULL); |
| if (err < 0) |
| goto out; |
| pos += len; |
| |
| next: |
| if (pos >= new_valid) |
| break; |
| |
| balance_dirty_pages_ratelimited(mapping); |
| cond_resched(); |
| } |
| |
| 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) |
| { |
| 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; |
| |
| folio_unlock(folio); |
| folio_put(folio); |
| cond_resched(); |
| } |
| out: |
| if (dirty) |
| mark_inode_dirty(inode); |
| return err; |
| } |
| |
| /* |
| * ntfs_file_mmap - file_operations::mmap |
| */ |
| static int ntfs_file_mmap(struct file *file, struct vm_area_struct *vma) |
| { |
| struct inode *inode = file_inode(file); |
| struct ntfs_inode *ni = ntfs_i(inode); |
| u64 from = ((u64)vma->vm_pgoff << PAGE_SHIFT); |
| bool rw = vma->vm_flags & VM_WRITE; |
| int err; |
| |
| if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
| return -EIO; |
| |
| if (is_encrypted(ni)) { |
| ntfs_inode_warn(inode, "mmap encrypted not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (is_dedup(ni)) { |
| ntfs_inode_warn(inode, "mmap deduplicated not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (is_compressed(ni) && rw) { |
| ntfs_inode_warn(inode, "mmap(write) compressed not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (rw) { |
| u64 to = min_t(loff_t, i_size_read(inode), |
| from + vma->vm_end - vma->vm_start); |
| |
| if (is_sparsed(ni)) { |
| /* Allocate clusters for rw map. */ |
| struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info; |
| CLST lcn, len; |
| CLST vcn = from >> sbi->cluster_bits; |
| CLST end = bytes_to_cluster(sbi, to); |
| bool new; |
| |
| for (; vcn < end; vcn += len) { |
| err = attr_data_get_block(ni, vcn, 1, &lcn, |
| &len, &new, true); |
| if (err) |
| goto out; |
| } |
| } |
| |
| if (ni->i_valid < to) { |
| inode_lock(inode); |
| err = ntfs_extend_initialized_size(file, ni, |
| ni->i_valid, to); |
| inode_unlock(inode); |
| if (err) |
| goto out; |
| } |
| } |
| |
| err = generic_file_mmap(file, vma); |
| out: |
| return err; |
| } |
| |
| static int ntfs_extend(struct inode *inode, loff_t pos, size_t count, |
| struct file *file) |
| { |
| struct ntfs_inode *ni = ntfs_i(inode); |
| struct address_space *mapping = inode->i_mapping; |
| loff_t end = pos + count; |
| bool extend_init = file && pos > ni->i_valid; |
| int err; |
| |
| if (end <= inode->i_size && !extend_init) |
| return 0; |
| |
| /* Mark rw ntfs as dirty. It will be cleared at umount. */ |
| ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_DIRTY); |
| |
| if (end > inode->i_size) { |
| 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); |
| if (err) |
| goto out; |
| } else { |
| err = 0; |
| } |
| |
| inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); |
| mark_inode_dirty(inode); |
| |
| if (IS_SYNC(inode)) { |
| int err2; |
| |
| err = filemap_fdatawrite_range(mapping, pos, end - 1); |
| err2 = sync_mapping_buffers(mapping); |
| if (!err) |
| err = err2; |
| err2 = write_inode_now(inode, 1); |
| if (!err) |
| err = err2; |
| if (!err) |
| err = filemap_fdatawait_range(mapping, pos, end - 1); |
| } |
| |
| out: |
| return err; |
| } |
| |
| static int ntfs_truncate(struct inode *inode, loff_t new_size) |
| { |
| struct super_block *sb = inode->i_sb; |
| 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)); |
| |
| 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); |
| up_write(&ni->file.run_lock); |
| |
| if (new_valid < ni->i_valid) |
| ni->i_valid = new_valid; |
| |
| ni_unlock(ni); |
| |
| ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE; |
| inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); |
| if (!IS_DIRSYNC(inode)) { |
| dirty = 1; |
| } else { |
| err = ntfs_sync_inode(inode); |
| if (err) |
| return err; |
| } |
| |
| if (dirty) |
| mark_inode_dirty(inode); |
| |
| /*ntfs_flush_inodes(inode->i_sb, inode, NULL);*/ |
| |
| return 0; |
| } |
| |
| /* |
| * ntfs_fallocate |
| * |
| * Preallocate space for a file. This implements ntfs's fallocate file |
| * operation, which gets called from sys_fallocate system call. User |
| * space requests 'len' bytes at 'vbo'. If FALLOC_FL_KEEP_SIZE is set |
| * we just allocate clusters without zeroing them out. Otherwise we |
| * allocate and zero out clusters via an expanding truncate. |
| */ |
| static long ntfs_fallocate(struct file *file, int mode, loff_t vbo, loff_t len) |
| { |
| struct inode *inode = file_inode(file); |
| struct address_space *mapping = inode->i_mapping; |
| struct super_block *sb = inode->i_sb; |
| struct ntfs_sb_info *sbi = sb->s_fs_info; |
| struct ntfs_inode *ni = ntfs_i(inode); |
| loff_t end = vbo + len; |
| loff_t vbo_down = round_down(vbo, max_t(unsigned long, |
| sbi->cluster_size, PAGE_SIZE)); |
| bool is_supported_holes = is_sparsed(ni) || is_compressed(ni); |
| loff_t i_size, new_size; |
| bool map_locked; |
| int err; |
| |
| /* No support for dir. */ |
| if (!S_ISREG(inode->i_mode)) |
| return -EOPNOTSUPP; |
| |
| /* |
| * vfs_fallocate checks all possible combinations of mode. |
| * Do additional checks here before ntfs_set_state(dirty). |
| */ |
| if (mode & FALLOC_FL_PUNCH_HOLE) { |
| if (!is_supported_holes) |
| return -EOPNOTSUPP; |
| } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
| } else if (mode & FALLOC_FL_INSERT_RANGE) { |
| if (!is_supported_holes) |
| return -EOPNOTSUPP; |
| } else if (mode & |
| ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE | |
| FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)) { |
| ntfs_inode_warn(inode, "fallocate(0x%x) is not supported", |
| mode); |
| return -EOPNOTSUPP; |
| } |
| |
| ntfs_set_state(sbi, NTFS_DIRTY_DIRTY); |
| |
| inode_lock(inode); |
| i_size = inode->i_size; |
| new_size = max(end, i_size); |
| map_locked = false; |
| |
| if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { |
| /* Should never be here, see ntfs_file_open. */ |
| err = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| if (mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE | |
| FALLOC_FL_INSERT_RANGE)) { |
| inode_dio_wait(inode); |
| filemap_invalidate_lock(mapping); |
| map_locked = true; |
| } |
| |
| if (mode & FALLOC_FL_PUNCH_HOLE) { |
| u32 frame_size; |
| loff_t mask, vbo_a, end_a, tmp; |
| |
| err = filemap_write_and_wait_range(mapping, vbo_down, |
| LLONG_MAX); |
| if (err) |
| goto out; |
| |
| truncate_pagecache(inode, vbo_down); |
| |
| ni_lock(ni); |
| err = attr_punch_hole(ni, vbo, len, &frame_size); |
| ni_unlock(ni); |
| if (!err) |
| goto ok; |
| |
| if (err != E_NTFS_NOTALIGNED) |
| goto out; |
| |
| /* Process not aligned punch. */ |
| err = 0; |
| 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); |
| 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 */ |
| if (end_a > vbo_a) { |
| ni_lock(ni); |
| err = attr_punch_hole(ni, vbo_a, end_a - vbo_a, NULL); |
| ni_unlock(ni); |
| if (err) |
| goto out; |
| } |
| } else if (mode & FALLOC_FL_COLLAPSE_RANGE) { |
| /* |
| * Write tail of the last page before removed range since |
| * it will get removed from the page cache below. |
| */ |
| err = filemap_write_and_wait_range(mapping, vbo_down, vbo); |
| if (err) |
| goto out; |
| |
| /* |
| * Write data that will be shifted to preserve them |
| * when discarding page cache below. |
| */ |
| err = filemap_write_and_wait_range(mapping, end, LLONG_MAX); |
| if (err) |
| goto out; |
| |
| truncate_pagecache(inode, vbo_down); |
| |
| ni_lock(ni); |
| err = attr_collapse_range(ni, vbo, len); |
| ni_unlock(ni); |
| } else if (mode & FALLOC_FL_INSERT_RANGE) { |
| /* Check new size. */ |
| err = inode_newsize_ok(inode, new_size); |
| if (err) |
| goto out; |
| |
| /* Write out all dirty pages. */ |
| err = filemap_write_and_wait_range(mapping, vbo_down, |
| LLONG_MAX); |
| if (err) |
| goto out; |
| truncate_pagecache(inode, vbo_down); |
| |
| ni_lock(ni); |
| err = attr_insert_range(ni, vbo, len); |
| ni_unlock(ni); |
| if (err) |
| goto out; |
| } else { |
| /* Check new size. */ |
| u8 cluster_bits = sbi->cluster_bits; |
| |
| /* Be sure file is non resident. */ |
| if (is_resident(ni)) { |
| ni_lock(ni); |
| err = attr_force_nonresident(ni); |
| ni_unlock(ni); |
| if (err) |
| goto out; |
| } |
| |
| /* generic/213: expected -ENOSPC instead of -EFBIG. */ |
| if (!is_supported_holes) { |
| loff_t to_alloc = new_size - inode_get_bytes(inode); |
| |
| if (to_alloc > 0 && |
| (to_alloc >> cluster_bits) > |
| wnd_zeroes(&sbi->used.bitmap)) { |
| err = -ENOSPC; |
| goto out; |
| } |
| } |
| |
| err = inode_newsize_ok(inode, new_size); |
| if (err) |
| goto out; |
| |
| if (new_size > i_size) { |
| /* |
| * Allocate clusters, do not change 'valid' size. |
| */ |
| err = ntfs_set_size(inode, new_size); |
| if (err) |
| goto out; |
| } |
| |
| if (is_supported_holes) { |
| CLST vcn = vbo >> 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; |
| } |
| } |
| |
| if (mode & FALLOC_FL_KEEP_SIZE) { |
| ni_lock(ni); |
| /* True - Keep preallocated. */ |
| err = attr_set_size(ni, ATTR_DATA, NULL, 0, |
| &ni->file.run, i_size, &ni->i_valid, |
| true, NULL); |
| ni_unlock(ni); |
| if (err) |
| goto out; |
| } else if (new_size > i_size) { |
| i_size_write(inode, new_size); |
| } |
| } |
| |
| ok: |
| err = file_modified(file); |
| if (err) |
| goto out; |
| |
| out: |
| if (map_locked) |
| filemap_invalidate_unlock(mapping); |
| |
| if (!err) { |
| inode_set_mtime_to_ts(inode, inode_set_ctime_current(inode)); |
| mark_inode_dirty(inode); |
| } |
| |
| inode_unlock(inode); |
| return err; |
| } |
| |
| /* |
| * ntfs3_setattr - inode_operations::setattr |
| */ |
| int ntfs3_setattr(struct mnt_idmap *idmap, struct dentry *dentry, |
| struct iattr *attr) |
| { |
| struct inode *inode = d_inode(dentry); |
| struct ntfs_inode *ni = ntfs_i(inode); |
| u32 ia_valid = attr->ia_valid; |
| umode_t mode = inode->i_mode; |
| int err; |
| |
| if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
| return -EIO; |
| |
| err = setattr_prepare(idmap, dentry, attr); |
| if (err) |
| goto out; |
| |
| if (ia_valid & ATTR_SIZE) { |
| loff_t newsize, oldsize; |
| |
| if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { |
| /* Should never be here, see ntfs_file_open(). */ |
| err = -EOPNOTSUPP; |
| goto out; |
| } |
| inode_dio_wait(inode); |
| oldsize = i_size_read(inode); |
| newsize = attr->ia_size; |
| |
| if (newsize <= oldsize) |
| err = ntfs_truncate(inode, newsize); |
| else |
| err = ntfs_extend(inode, newsize, 0, NULL); |
| |
| if (err) |
| goto out; |
| |
| ni->ni_flags |= NI_FLAG_UPDATE_PARENT; |
| i_size_write(inode, newsize); |
| } |
| |
| setattr_copy(idmap, inode, attr); |
| |
| if (mode != inode->i_mode) { |
| err = ntfs_acl_chmod(idmap, dentry); |
| if (err) |
| goto out; |
| |
| /* Linux 'w' -> Windows 'ro'. */ |
| if (0222 & inode->i_mode) |
| ni->std_fa &= ~FILE_ATTRIBUTE_READONLY; |
| else |
| ni->std_fa |= FILE_ATTRIBUTE_READONLY; |
| } |
| |
| if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) |
| ntfs_save_wsl_perm(inode, NULL); |
| mark_inode_dirty(inode); |
| out: |
| return err; |
| } |
| |
| 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); |
| |
| if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
| return -EIO; |
| |
| if (is_encrypted(ni)) { |
| ntfs_inode_warn(inode, "encrypted i/o not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) { |
| ntfs_inode_warn(inode, "direct i/o + compressed not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| #ifndef CONFIG_NTFS3_LZX_XPRESS |
| if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) { |
| ntfs_inode_warn( |
| inode, |
| "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files"); |
| return -EOPNOTSUPP; |
| } |
| #endif |
| |
| if (is_dedup(ni)) { |
| ntfs_inode_warn(inode, "read deduplicated not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| return generic_file_read_iter(iocb, iter); |
| } |
| |
| static ssize_t ntfs_file_splice_read(struct file *in, loff_t *ppos, |
| struct pipe_inode_info *pipe, size_t len, |
| unsigned int flags) |
| { |
| struct inode *inode = file_inode(in); |
| struct ntfs_inode *ni = ntfs_i(inode); |
| |
| if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
| return -EIO; |
| |
| if (is_encrypted(ni)) { |
| ntfs_inode_warn(inode, "encrypted i/o not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| #ifndef CONFIG_NTFS3_LZX_XPRESS |
| if (ni->ni_flags & NI_FLAG_COMPRESSED_MASK) { |
| ntfs_inode_warn( |
| inode, |
| "activate CONFIG_NTFS3_LZX_XPRESS to read external compressed files"); |
| return -EOPNOTSUPP; |
| } |
| #endif |
| |
| if (is_dedup(ni)) { |
| ntfs_inode_warn(inode, "read deduplicated not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| return filemap_splice_read(in, ppos, pipe, len, flags); |
| } |
| |
| /* |
| * ntfs_get_frame_pages |
| * |
| * Return: Array of locked pages. |
| */ |
| static int ntfs_get_frame_pages(struct address_space *mapping, pgoff_t index, |
| struct page **pages, u32 pages_per_frame, |
| bool *frame_uptodate) |
| { |
| gfp_t gfp_mask = mapping_gfp_mask(mapping); |
| u32 npages; |
| |
| *frame_uptodate = true; |
| |
| for (npages = 0; npages < pages_per_frame; npages++, index++) { |
| struct folio *folio; |
| |
| folio = __filemap_get_folio(mapping, index, |
| FGP_LOCK | FGP_ACCESSED | FGP_CREAT, |
| gfp_mask); |
| if (IS_ERR(folio)) { |
| while (npages--) { |
| folio = page_folio(pages[npages]); |
| folio_unlock(folio); |
| folio_put(folio); |
| } |
| |
| return -ENOMEM; |
| } |
| |
| if (!folio_test_uptodate(folio)) |
| *frame_uptodate = false; |
| |
| pages[npages] = &folio->page; |
| } |
| |
| return 0; |
| } |
| |
| /* |
| * ntfs_compress_write - Helper for ntfs_file_write_iter() (compressed files). |
| */ |
| static ssize_t ntfs_compress_write(struct kiocb *iocb, struct iov_iter *from) |
| { |
| int err; |
| struct file *file = iocb->ki_filp; |
| size_t count = iov_iter_count(from); |
| loff_t pos = iocb->ki_pos; |
| struct inode *inode = file_inode(file); |
| loff_t i_size = i_size_read(inode); |
| struct address_space *mapping = inode->i_mapping; |
| struct ntfs_inode *ni = ntfs_i(inode); |
| u64 valid = ni->i_valid; |
| struct ntfs_sb_info *sbi = ni->mi.sbi; |
| struct page *page, **pages = NULL; |
| size_t written = 0; |
| u8 frame_bits = NTFS_LZNT_CUNIT + sbi->cluster_bits; |
| u32 frame_size = 1u << frame_bits; |
| u32 pages_per_frame = frame_size >> PAGE_SHIFT; |
| u32 ip, off; |
| CLST frame; |
| u64 frame_vbo; |
| pgoff_t index; |
| bool frame_uptodate; |
| |
| if (frame_size < PAGE_SIZE) { |
| /* |
| * frame_size == 8K if cluster 512 |
| * frame_size == 64K if cluster 4096 |
| */ |
| ntfs_inode_warn(inode, "page size is bigger than frame size"); |
| return -EOPNOTSUPP; |
| } |
| |
| pages = kmalloc_array(pages_per_frame, sizeof(struct page *), GFP_NOFS); |
| if (!pages) |
| return -ENOMEM; |
| |
| err = file_remove_privs(file); |
| if (err) |
| goto out; |
| |
| err = file_update_time(file); |
| if (err) |
| goto out; |
| |
| /* Zero range [valid : pos). */ |
| while (valid < pos) { |
| CLST lcn, clen; |
| |
| frame = valid >> frame_bits; |
| frame_vbo = valid & ~(frame_size - 1); |
| off = valid & (frame_size - 1); |
| |
| err = attr_data_get_block(ni, frame << NTFS_LZNT_CUNIT, 1, &lcn, |
| &clen, NULL, false); |
| if (err) |
| goto out; |
| |
| if (lcn == SPARSE_LCN) { |
| ni->i_valid = valid = |
| frame_vbo + ((u64)clen << sbi->cluster_bits); |
| continue; |
| } |
| |
| /* Load full frame. */ |
| err = ntfs_get_frame_pages(mapping, frame_vbo >> PAGE_SHIFT, |
| pages, pages_per_frame, |
| &frame_uptodate); |
| if (err) |
| goto out; |
| |
| if (!frame_uptodate && off) { |
| err = ni_read_frame(ni, frame_vbo, pages, |
| pages_per_frame); |
| if (err) { |
| for (ip = 0; ip < pages_per_frame; ip++) { |
| page = pages[ip]; |
| unlock_page(page); |
| put_page(page); |
| } |
| goto out; |
| } |
| } |
| |
| ip = off >> PAGE_SHIFT; |
| off = offset_in_page(valid); |
| for (; ip < pages_per_frame; ip++, off = 0) { |
| page = pages[ip]; |
| zero_user_segment(page, off, PAGE_SIZE); |
| flush_dcache_page(page); |
| SetPageUptodate(page); |
| } |
| |
| ni_lock(ni); |
| err = ni_write_frame(ni, pages, pages_per_frame); |
| ni_unlock(ni); |
| |
| for (ip = 0; ip < pages_per_frame; ip++) { |
| page = pages[ip]; |
| SetPageUptodate(page); |
| unlock_page(page); |
| put_page(page); |
| } |
| |
| if (err) |
| goto out; |
| |
| ni->i_valid = valid = frame_vbo + frame_size; |
| } |
| |
| /* Copy user data [pos : pos + count). */ |
| while (count) { |
| size_t copied, bytes; |
| |
| off = pos & (frame_size - 1); |
| bytes = frame_size - off; |
| if (bytes > count) |
| bytes = count; |
| |
| frame_vbo = pos & ~(frame_size - 1); |
| index = frame_vbo >> PAGE_SHIFT; |
| |
| if (unlikely(fault_in_iov_iter_readable(from, bytes))) { |
| err = -EFAULT; |
| goto out; |
| } |
| |
| /* Load full frame. */ |
| err = ntfs_get_frame_pages(mapping, index, pages, |
| pages_per_frame, &frame_uptodate); |
| if (err) |
| goto out; |
| |
| if (!frame_uptodate) { |
| loff_t to = pos + bytes; |
| |
| if (off || (to < i_size && (to & (frame_size - 1)))) { |
| err = ni_read_frame(ni, frame_vbo, pages, |
| pages_per_frame); |
| if (err) { |
| for (ip = 0; ip < pages_per_frame; |
| ip++) { |
| page = pages[ip]; |
| unlock_page(page); |
| put_page(page); |
| } |
| goto out; |
| } |
| } |
| } |
| |
| WARN_ON(!bytes); |
| copied = 0; |
| ip = off >> PAGE_SHIFT; |
| off = offset_in_page(pos); |
| |
| /* Copy user data to pages. */ |
| for (;;) { |
| size_t cp, tail = PAGE_SIZE - off; |
| |
| page = pages[ip]; |
| cp = copy_page_from_iter_atomic(page, off, |
| min(tail, bytes), from); |
| flush_dcache_page(page); |
| |
| copied += cp; |
| bytes -= cp; |
| if (!bytes || !cp) |
| break; |
| |
| if (cp < tail) { |
| off += cp; |
| } else { |
| ip++; |
| off = 0; |
| } |
| } |
| |
| ni_lock(ni); |
| err = ni_write_frame(ni, pages, pages_per_frame); |
| ni_unlock(ni); |
| |
| for (ip = 0; ip < pages_per_frame; ip++) { |
| page = pages[ip]; |
| ClearPageDirty(page); |
| SetPageUptodate(page); |
| unlock_page(page); |
| put_page(page); |
| } |
| |
| if (err) |
| goto out; |
| |
| /* |
| * We can loop for a long time in here. Be nice and allow |
| * us to schedule out to avoid softlocking if preempt |
| * is disabled. |
| */ |
| cond_resched(); |
| |
| pos += copied; |
| written += copied; |
| |
| count = iov_iter_count(from); |
| } |
| |
| out: |
| kfree(pages); |
| |
| if (err < 0) |
| return err; |
| |
| iocb->ki_pos += written; |
| if (iocb->ki_pos > ni->i_valid) |
| ni->i_valid = iocb->ki_pos; |
| if (iocb->ki_pos > i_size) |
| i_size_write(inode, iocb->ki_pos); |
| |
| return written; |
| } |
| |
| /* |
| * ntfs_file_write_iter - file_operations::write_iter |
| */ |
| 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); |
| ssize_t ret; |
| int err; |
| struct ntfs_inode *ni = ntfs_i(inode); |
| |
| if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
| return -EIO; |
| |
| if (is_encrypted(ni)) { |
| ntfs_inode_warn(inode, "encrypted i/o not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (is_compressed(ni) && (iocb->ki_flags & IOCB_DIRECT)) { |
| ntfs_inode_warn(inode, "direct i/o + compressed not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (is_dedup(ni)) { |
| ntfs_inode_warn(inode, "write into deduplicated not supported"); |
| return -EOPNOTSUPP; |
| } |
| |
| if (!inode_trylock(inode)) { |
| if (iocb->ki_flags & IOCB_NOWAIT) |
| return -EAGAIN; |
| inode_lock(inode); |
| } |
| |
| ret = generic_write_checks(iocb, from); |
| if (ret <= 0) |
| goto out; |
| |
| err = file_modified(iocb->ki_filp); |
| if (err) { |
| ret = err; |
| goto out; |
| } |
| |
| if (WARN_ON(ni->ni_flags & NI_FLAG_COMPRESSED_MASK)) { |
| /* Should never be here, see ntfs_file_open(). */ |
| ret = -EOPNOTSUPP; |
| goto out; |
| } |
| |
| ret = ntfs_extend(inode, iocb->ki_pos, ret, file); |
| if (ret) |
| goto out; |
| |
| ret = is_compressed(ni) ? ntfs_compress_write(iocb, from) : |
| __generic_file_write_iter(iocb, from); |
| |
| out: |
| inode_unlock(inode); |
| |
| if (ret > 0) |
| ret = generic_write_sync(iocb, ret); |
| |
| return ret; |
| } |
| |
| /* |
| * ntfs_file_open - file_operations::open |
| */ |
| int ntfs_file_open(struct inode *inode, struct file *file) |
| { |
| struct ntfs_inode *ni = ntfs_i(inode); |
| |
| if (unlikely(ntfs3_forced_shutdown(inode->i_sb))) |
| return -EIO; |
| |
| if (unlikely((is_compressed(ni) || is_encrypted(ni)) && |
| (file->f_flags & O_DIRECT))) { |
| return -EOPNOTSUPP; |
| } |
| |
| /* Decompress "external compressed" file if opened for rw. */ |
| if ((ni->ni_flags & NI_FLAG_COMPRESSED_MASK) && |
| (file->f_flags & (O_WRONLY | O_RDWR | O_TRUNC))) { |
| #ifdef CONFIG_NTFS3_LZX_XPRESS |
| int err = ni_decompress_file(ni); |
| |
| if (err) |
| return err; |
| #else |
| ntfs_inode_warn( |
| inode, |
| "activate CONFIG_NTFS3_LZX_XPRESS to write external compressed files"); |
| return -EOPNOTSUPP; |
| #endif |
| } |
| |
| return generic_file_open(inode, file); |
| } |
| |
| /* |
| * ntfs_file_release - file_operations::release |
| */ |
| 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)) { |
| ni_lock(ni); |
| down_write(&ni->file.run_lock); |
| |
| err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, |
| i_size_read(inode), &ni->i_valid, false, |
| NULL); |
| |
| up_write(&ni->file.run_lock); |
| ni_unlock(ni); |
| } |
| return err; |
| } |
| |
| /* |
| * ntfs_fiemap - inode_operations::fiemap |
| */ |
| int ntfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
| __u64 start, __u64 len) |
| { |
| int err; |
| struct ntfs_inode *ni = ntfs_i(inode); |
| |
| err = fiemap_prep(inode, fieinfo, start, &len, ~FIEMAP_FLAG_XATTR); |
| if (err) |
| return err; |
| |
| ni_lock(ni); |
| |
| err = ni_fiemap(ni, fieinfo, start, len); |
| |
| ni_unlock(ni); |
| |
| return err; |
| } |
| |
| // clang-format off |
| const struct inode_operations ntfs_file_inode_operations = { |
| .getattr = ntfs_getattr, |
| .setattr = ntfs3_setattr, |
| .listxattr = ntfs_listxattr, |
| .get_acl = ntfs_get_acl, |
| .set_acl = ntfs_set_acl, |
| .fiemap = ntfs_fiemap, |
| .fileattr_get = ntfs_fileattr_get, |
| .fileattr_set = ntfs_fileattr_set, |
| }; |
| |
| const struct file_operations ntfs_file_operations = { |
| .llseek = generic_file_llseek, |
| .read_iter = ntfs_file_read_iter, |
| .write_iter = ntfs_file_write_iter, |
| .unlocked_ioctl = ntfs_ioctl, |
| #ifdef CONFIG_COMPAT |
| .compat_ioctl = ntfs_compat_ioctl, |
| #endif |
| .splice_read = ntfs_file_splice_read, |
| .mmap = ntfs_file_mmap, |
| .open = ntfs_file_open, |
| .fsync = generic_file_fsync, |
| .splice_write = iter_file_splice_write, |
| .fallocate = ntfs_fallocate, |
| .release = ntfs_file_release, |
| }; |
| |
| #if IS_ENABLED(CONFIG_NTFS_FS) |
| const struct file_operations ntfs_legacy_file_operations = { |
| .llseek = generic_file_llseek, |
| .read_iter = ntfs_file_read_iter, |
| .splice_read = ntfs_file_splice_read, |
| .open = ntfs_file_open, |
| .release = ntfs_file_release, |
| }; |
| #endif |
| // clang-format on |