1261 lines
28 KiB
C
1261 lines
28 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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*
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* Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
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*
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* Regular file handling primitives for NTFS-based filesystems.
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*
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*/
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#include <linux/backing-dev.h>
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#include <linux/blkdev.h>
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#include <linux/buffer_head.h>
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#include <linux/compat.h>
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#include <linux/falloc.h>
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#include <linux/fiemap.h>
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#include "debug.h"
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#include "ntfs.h"
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#include "ntfs_fs.h"
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static int ntfs_ioctl_fitrim(struct ntfs_sb_info *sbi, unsigned long arg)
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{
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struct fstrim_range __user *user_range;
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struct fstrim_range range;
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struct request_queue *q = bdev_get_queue(sbi->sb->s_bdev);
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int err;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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if (!blk_queue_discard(q))
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return -EOPNOTSUPP;
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user_range = (struct fstrim_range __user *)arg;
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if (copy_from_user(&range, user_range, sizeof(range)))
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return -EFAULT;
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range.minlen = max_t(u32, range.minlen, q->limits.discard_granularity);
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err = ntfs_trim_fs(sbi, &range);
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if (err < 0)
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return err;
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if (copy_to_user(user_range, &range, sizeof(range)))
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return -EFAULT;
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return 0;
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}
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static long ntfs_ioctl(struct file *filp, u32 cmd, unsigned long arg)
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{
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struct inode *inode = file_inode(filp);
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struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
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switch (cmd) {
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case FITRIM:
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return ntfs_ioctl_fitrim(sbi, arg);
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}
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return -ENOTTY; /* Inappropriate ioctl for device. */
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}
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#ifdef CONFIG_COMPAT
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static long ntfs_compat_ioctl(struct file *filp, u32 cmd, unsigned long arg)
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{
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return ntfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
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}
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#endif
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/*
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* ntfs_getattr - inode_operations::getattr
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*/
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int ntfs_getattr(struct user_namespace *mnt_userns, const struct path *path,
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struct kstat *stat, u32 request_mask, u32 flags)
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{
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struct inode *inode = d_inode(path->dentry);
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struct ntfs_inode *ni = ntfs_i(inode);
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if (is_compressed(ni))
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stat->attributes |= STATX_ATTR_COMPRESSED;
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if (is_encrypted(ni))
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stat->attributes |= STATX_ATTR_ENCRYPTED;
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stat->attributes_mask |= STATX_ATTR_COMPRESSED | STATX_ATTR_ENCRYPTED;
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generic_fillattr(mnt_userns, inode, stat);
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stat->result_mask |= STATX_BTIME;
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stat->btime = ni->i_crtime;
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stat->blksize = ni->mi.sbi->cluster_size; /* 512, 1K, ..., 2M */
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return 0;
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}
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static int ntfs_extend_initialized_size(struct file *file,
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struct ntfs_inode *ni,
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const loff_t valid,
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const loff_t new_valid)
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{
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struct inode *inode = &ni->vfs_inode;
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struct address_space *mapping = inode->i_mapping;
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struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
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loff_t pos = valid;
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int err;
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if (is_resident(ni)) {
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ni->i_valid = new_valid;
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return 0;
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}
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WARN_ON(is_compressed(ni));
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WARN_ON(valid >= new_valid);
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for (;;) {
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u32 zerofrom, len;
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struct page *page;
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void *fsdata;
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u8 bits;
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CLST vcn, lcn, clen;
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if (is_sparsed(ni)) {
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bits = sbi->cluster_bits;
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vcn = pos >> bits;
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err = attr_data_get_block(ni, vcn, 0, &lcn, &clen,
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NULL);
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if (err)
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goto out;
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if (lcn == SPARSE_LCN) {
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loff_t vbo = (loff_t)vcn << bits;
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loff_t to = vbo + ((loff_t)clen << bits);
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if (to <= new_valid) {
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ni->i_valid = to;
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pos = to;
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goto next;
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}
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if (vbo < pos) {
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pos = vbo;
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} else {
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to = (new_valid >> bits) << bits;
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if (pos < to) {
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ni->i_valid = to;
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pos = to;
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goto next;
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}
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}
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}
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}
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zerofrom = pos & (PAGE_SIZE - 1);
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len = PAGE_SIZE - zerofrom;
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if (pos + len > new_valid)
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len = new_valid - pos;
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err = pagecache_write_begin(file, mapping, pos, len, 0, &page,
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&fsdata);
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if (err)
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goto out;
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zero_user_segment(page, zerofrom, PAGE_SIZE);
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/* This function in any case puts page. */
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err = pagecache_write_end(file, mapping, pos, len, len, page,
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fsdata);
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if (err < 0)
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goto out;
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pos += len;
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next:
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if (pos >= new_valid)
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break;
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balance_dirty_pages_ratelimited(mapping);
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cond_resched();
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}
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return 0;
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out:
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ni->i_valid = valid;
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ntfs_inode_warn(inode, "failed to extend initialized size to %llx.",
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new_valid);
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return err;
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}
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/*
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* ntfs_zero_range - Helper function for punch_hole.
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*
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* It zeroes a range [vbo, vbo_to).
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*/
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static int ntfs_zero_range(struct inode *inode, u64 vbo, u64 vbo_to)
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{
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int err = 0;
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struct address_space *mapping = inode->i_mapping;
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u32 blocksize = 1 << inode->i_blkbits;
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pgoff_t idx = vbo >> PAGE_SHIFT;
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u32 z_start = vbo & (PAGE_SIZE - 1);
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pgoff_t idx_end = (vbo_to + PAGE_SIZE - 1) >> PAGE_SHIFT;
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loff_t page_off;
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struct buffer_head *head, *bh;
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u32 bh_next, bh_off, z_end;
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sector_t iblock;
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struct page *page;
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for (; idx < idx_end; idx += 1, z_start = 0) {
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page_off = (loff_t)idx << PAGE_SHIFT;
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z_end = (page_off + PAGE_SIZE) > vbo_to ? (vbo_to - page_off)
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: PAGE_SIZE;
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iblock = page_off >> inode->i_blkbits;
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page = find_or_create_page(mapping, idx,
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mapping_gfp_constraint(mapping,
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~__GFP_FS));
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if (!page)
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return -ENOMEM;
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if (!page_has_buffers(page))
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create_empty_buffers(page, blocksize, 0);
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bh = head = page_buffers(page);
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bh_off = 0;
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do {
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bh_next = bh_off + blocksize;
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if (bh_next <= z_start || bh_off >= z_end)
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continue;
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if (!buffer_mapped(bh)) {
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ntfs_get_block(inode, iblock, bh, 0);
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/* Unmapped? It's a hole - nothing to do. */
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if (!buffer_mapped(bh))
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continue;
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}
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/* Ok, it's mapped. Make sure it's up-to-date. */
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if (PageUptodate(page))
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set_buffer_uptodate(bh);
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if (!buffer_uptodate(bh)) {
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lock_buffer(bh);
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bh->b_end_io = end_buffer_read_sync;
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get_bh(bh);
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submit_bh(REQ_OP_READ, 0, bh);
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wait_on_buffer(bh);
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if (!buffer_uptodate(bh)) {
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unlock_page(page);
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put_page(page);
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err = -EIO;
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goto out;
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}
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}
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mark_buffer_dirty(bh);
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} while (bh_off = bh_next, iblock += 1,
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head != (bh = bh->b_this_page));
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zero_user_segment(page, z_start, z_end);
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unlock_page(page);
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put_page(page);
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cond_resched();
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}
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out:
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mark_inode_dirty(inode);
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return err;
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}
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/*
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* ntfs_sparse_cluster - Helper function to zero a new allocated clusters.
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*
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* NOTE: 512 <= cluster size <= 2M
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*/
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void ntfs_sparse_cluster(struct inode *inode, struct page *page0, CLST vcn,
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CLST len)
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{
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struct address_space *mapping = inode->i_mapping;
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struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
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u64 vbo = (u64)vcn << sbi->cluster_bits;
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u64 bytes = (u64)len << sbi->cluster_bits;
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u32 blocksize = 1 << inode->i_blkbits;
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pgoff_t idx0 = page0 ? page0->index : -1;
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loff_t vbo_clst = vbo & sbi->cluster_mask_inv;
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loff_t end = ntfs_up_cluster(sbi, vbo + bytes);
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pgoff_t idx = vbo_clst >> PAGE_SHIFT;
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u32 from = vbo_clst & (PAGE_SIZE - 1);
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pgoff_t idx_end = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
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loff_t page_off;
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u32 to;
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bool partial;
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struct page *page;
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for (; idx < idx_end; idx += 1, from = 0) {
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page = idx == idx0 ? page0 : grab_cache_page(mapping, idx);
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if (!page)
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continue;
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page_off = (loff_t)idx << PAGE_SHIFT;
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to = (page_off + PAGE_SIZE) > end ? (end - page_off)
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: PAGE_SIZE;
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partial = false;
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if ((from || PAGE_SIZE != to) &&
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likely(!page_has_buffers(page))) {
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create_empty_buffers(page, blocksize, 0);
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}
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if (page_has_buffers(page)) {
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struct buffer_head *head, *bh;
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u32 bh_off = 0;
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bh = head = page_buffers(page);
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do {
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u32 bh_next = bh_off + blocksize;
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if (from <= bh_off && bh_next <= to) {
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set_buffer_uptodate(bh);
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mark_buffer_dirty(bh);
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} else if (!buffer_uptodate(bh)) {
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partial = true;
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}
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bh_off = bh_next;
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} while (head != (bh = bh->b_this_page));
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}
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zero_user_segment(page, from, to);
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if (!partial) {
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if (!PageUptodate(page))
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SetPageUptodate(page);
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set_page_dirty(page);
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}
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if (idx != idx0) {
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unlock_page(page);
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put_page(page);
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}
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cond_resched();
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}
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mark_inode_dirty(inode);
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}
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/*
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* ntfs_file_mmap - file_operations::mmap
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*/
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static int ntfs_file_mmap(struct file *file, struct vm_area_struct *vma)
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{
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struct address_space *mapping = file->f_mapping;
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struct inode *inode = mapping->host;
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struct ntfs_inode *ni = ntfs_i(inode);
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u64 from = ((u64)vma->vm_pgoff << PAGE_SHIFT);
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bool rw = vma->vm_flags & VM_WRITE;
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int err;
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if (is_encrypted(ni)) {
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ntfs_inode_warn(inode, "mmap encrypted not supported");
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return -EOPNOTSUPP;
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}
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if (is_dedup(ni)) {
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ntfs_inode_warn(inode, "mmap deduplicated not supported");
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return -EOPNOTSUPP;
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}
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if (is_compressed(ni) && rw) {
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ntfs_inode_warn(inode, "mmap(write) compressed not supported");
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return -EOPNOTSUPP;
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}
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if (rw) {
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u64 to = min_t(loff_t, i_size_read(inode),
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from + vma->vm_end - vma->vm_start);
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if (is_sparsed(ni)) {
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/* Allocate clusters for rw map. */
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struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
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CLST lcn, len;
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CLST vcn = from >> sbi->cluster_bits;
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CLST end = bytes_to_cluster(sbi, to);
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bool new;
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for (; vcn < end; vcn += len) {
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err = attr_data_get_block(ni, vcn, 1, &lcn,
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&len, &new);
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if (err)
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goto out;
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if (!new)
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continue;
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ntfs_sparse_cluster(inode, NULL, vcn, 1);
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}
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}
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if (ni->i_valid < to) {
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if (!inode_trylock(inode)) {
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err = -EAGAIN;
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goto out;
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}
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err = ntfs_extend_initialized_size(file, ni,
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ni->i_valid, to);
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inode_unlock(inode);
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if (err)
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goto out;
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}
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}
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err = generic_file_mmap(file, vma);
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out:
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return err;
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}
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static int ntfs_extend(struct inode *inode, loff_t pos, size_t count,
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struct file *file)
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{
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struct ntfs_inode *ni = ntfs_i(inode);
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struct address_space *mapping = inode->i_mapping;
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loff_t end = pos + count;
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bool extend_init = file && pos > ni->i_valid;
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int err;
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if (end <= inode->i_size && !extend_init)
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return 0;
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/* Mark rw ntfs as dirty. It will be cleared at umount. */
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ntfs_set_state(ni->mi.sbi, NTFS_DIRTY_DIRTY);
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|
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if (end > inode->i_size) {
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err = ntfs_set_size(inode, end);
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if (err)
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goto out;
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inode->i_size = end;
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}
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|
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if (extend_init && !is_compressed(ni)) {
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err = ntfs_extend_initialized_size(file, ni, ni->i_valid, pos);
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if (err)
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goto out;
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} else {
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err = 0;
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}
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|
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inode->i_ctime = inode->i_mtime = current_time(inode);
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mark_inode_dirty(inode);
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|
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if (IS_SYNC(inode)) {
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int err2;
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err = filemap_fdatawrite_range(mapping, pos, end - 1);
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err2 = sync_mapping_buffers(mapping);
|
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if (!err)
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err = err2;
|
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err2 = write_inode_now(inode, 1);
|
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if (!err)
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err = err2;
|
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if (!err)
|
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err = filemap_fdatawait_range(mapping, pos, end - 1);
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}
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out:
|
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return err;
|
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}
|
|
|
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static int ntfs_truncate(struct inode *inode, loff_t new_size)
|
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{
|
|
struct super_block *sb = inode->i_sb;
|
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struct ntfs_inode *ni = ntfs_i(inode);
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int err, dirty = 0;
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u64 new_valid;
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|
|
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if (!S_ISREG(inode->i_mode))
|
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return 0;
|
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|
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if (is_compressed(ni)) {
|
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if (ni->i_valid > new_size)
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ni->i_valid = new_size;
|
|
} else {
|
|
err = block_truncate_page(inode->i_mapping, new_size,
|
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ntfs_get_block);
|
|
if (err)
|
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return err;
|
|
}
|
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|
|
new_valid = ntfs_up_block(sb, min_t(u64, ni->i_valid, new_size));
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|
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ni_lock(ni);
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|
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truncate_setsize(inode, new_size);
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|
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down_write(&ni->file.run_lock);
|
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err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
|
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&new_valid, ni->mi.sbi->options->prealloc, NULL);
|
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up_write(&ni->file.run_lock);
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|
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if (new_valid < ni->i_valid)
|
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ni->i_valid = new_valid;
|
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|
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ni_unlock(ni);
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|
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ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
|
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inode->i_ctime = inode->i_mtime = current_time(inode);
|
|
if (!IS_DIRSYNC(inode)) {
|
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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);*/
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|
|
|
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->f_mapping->host;
|
|
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, PAGE_SIZE);
|
|
loff_t i_size;
|
|
int err;
|
|
|
|
/* No support for dir. */
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EOPNOTSUPP;
|
|
|
|
/* Return error if mode is not supported. */
|
|
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
|
|
FALLOC_FL_COLLAPSE_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;
|
|
|
|
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) {
|
|
u32 frame_size;
|
|
loff_t mask, vbo_a, end_a, tmp;
|
|
|
|
if (!(mode & FALLOC_FL_KEEP_SIZE)) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
err = filemap_write_and_wait_range(inode->i_mapping, vbo,
|
|
end - 1);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = filemap_write_and_wait_range(inode->i_mapping, end,
|
|
LLONG_MAX);
|
|
if (err)
|
|
goto out;
|
|
|
|
inode_dio_wait(inode);
|
|
|
|
truncate_pagecache(inode, vbo_down);
|
|
|
|
if (!is_sparsed(ni) && !is_compressed(ni)) {
|
|
/*
|
|
* Normal file, can't make hole.
|
|
* TODO: Try to find way to save info about hole.
|
|
*/
|
|
err = -EOPNOTSUPP;
|
|
goto out;
|
|
}
|
|
|
|
ni_lock(ni);
|
|
err = attr_punch_hole(ni, vbo, len, &frame_size);
|
|
ni_unlock(ni);
|
|
if (err != E_NTFS_NOTALIGNED)
|
|
goto out;
|
|
|
|
/* Process not aligned punch. */
|
|
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);
|
|
}
|
|
} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
|
|
if (mode & ~FALLOC_FL_COLLAPSE_RANGE) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* 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(inode->i_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(inode->i_mapping, end,
|
|
LLONG_MAX);
|
|
if (err)
|
|
goto out;
|
|
|
|
/* Wait for existing dio to complete. */
|
|
inode_dio_wait(inode);
|
|
|
|
truncate_pagecache(inode, vbo_down);
|
|
|
|
ni_lock(ni);
|
|
err = attr_collapse_range(ni, vbo, len);
|
|
ni_unlock(ni);
|
|
} else {
|
|
/*
|
|
* Normal file: Allocate clusters, do not change 'valid' size.
|
|
*/
|
|
loff_t new_size = max(end, i_size);
|
|
|
|
err = inode_newsize_ok(inode, new_size);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = ntfs_set_size(inode, new_size);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (is_sparsed(ni) || is_compressed(ni)) {
|
|
CLST vcn_v = ni->i_valid >> sbi->cluster_bits;
|
|
CLST vcn = vbo >> sbi->cluster_bits;
|
|
CLST cend = bytes_to_cluster(sbi, end);
|
|
CLST lcn, clen;
|
|
bool new;
|
|
|
|
/*
|
|
* Allocate but do not zero new clusters. (see below comments)
|
|
* This breaks security: One can read unused on-disk areas.
|
|
* Zeroing these clusters may be too long.
|
|
* Maybe we should check here for root rights?
|
|
*/
|
|
for (; vcn < cend; vcn += clen) {
|
|
err = attr_data_get_block(ni, vcn, cend - vcn,
|
|
&lcn, &clen, &new);
|
|
if (err)
|
|
goto out;
|
|
if (!new || vcn >= vcn_v)
|
|
continue;
|
|
|
|
/*
|
|
* Unwritten area.
|
|
* NTFS is not able to store several unwritten areas.
|
|
* Activate 'ntfs_sparse_cluster' to zero new allocated clusters.
|
|
*
|
|
* Dangerous in case:
|
|
* 1G of sparsed clusters + 1 cluster of data =>
|
|
* valid_size == 1G + 1 cluster
|
|
* fallocate(1G) will zero 1G and this can be very long
|
|
* xfstest 016/086 will fail without 'ntfs_sparse_cluster'.
|
|
*/
|
|
ntfs_sparse_cluster(inode, NULL, vcn,
|
|
min(vcn_v - vcn, clen));
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (err == -EFBIG)
|
|
err = -ENOSPC;
|
|
|
|
if (!err) {
|
|
inode->i_ctime = inode->i_mtime = current_time(inode);
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
inode_unlock(inode);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs3_setattr - inode_operations::setattr
|
|
*/
|
|
int ntfs3_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
|
|
struct iattr *attr)
|
|
{
|
|
struct super_block *sb = dentry->d_sb;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
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 (sbi->options->noacsrules) {
|
|
/* "No access rules" - Force any changes of time etc. */
|
|
attr->ia_valid |= ATTR_FORCE;
|
|
/* and disable for editing some attributes. */
|
|
attr->ia_valid &= ~(ATTR_UID | ATTR_GID | ATTR_MODE);
|
|
ia_valid = attr->ia_valid;
|
|
}
|
|
|
|
err = setattr_prepare(mnt_userns, dentry, attr);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (ia_valid & ATTR_SIZE) {
|
|
loff_t oldsize = inode->i_size;
|
|
|
|
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);
|
|
|
|
if (attr->ia_size <= oldsize)
|
|
err = ntfs_truncate(inode, attr->ia_size);
|
|
else if (attr->ia_size > oldsize)
|
|
err = ntfs_extend(inode, attr->ia_size, 0, NULL);
|
|
|
|
if (err)
|
|
goto out;
|
|
|
|
ni->ni_flags |= NI_FLAG_UPDATE_PARENT;
|
|
}
|
|
|
|
setattr_copy(mnt_userns, inode, attr);
|
|
|
|
if (mode != inode->i_mode) {
|
|
err = ntfs_acl_chmod(mnt_userns, inode);
|
|
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);
|
|
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->f_mapping->host;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
|
|
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);
|
|
}
|
|
|
|
/*
|
|
* 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 page *page;
|
|
|
|
page = find_or_create_page(mapping, index, gfp_mask);
|
|
if (!page) {
|
|
while (npages--) {
|
|
page = pages[npages];
|
|
unlock_page(page);
|
|
put_page(page);
|
|
}
|
|
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (!PageUptodate(page))
|
|
*frame_uptodate = false;
|
|
|
|
pages[npages] = 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 = inode->i_size;
|
|
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;
|
|
|
|
current->backing_dev_info = inode_to_bdi(inode);
|
|
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, 0, &lcn,
|
|
&clen, NULL);
|
|
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 = pos >> frame_bits;
|
|
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);
|
|
|
|
current->backing_dev_info = NULL;
|
|
|
|
if (err < 0)
|
|
return err;
|
|
|
|
iocb->ki_pos += written;
|
|
if (iocb->ki_pos > ni->i_valid)
|
|
ni->i_valid = 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 address_space *mapping = file->f_mapping;
|
|
struct inode *inode = mapping->host;
|
|
ssize_t ret;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
|
|
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;
|
|
|
|
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((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,
|
|
inode->i_size, &ni->i_valid, false, NULL);
|
|
|
|
up_write(&ni->file.run_lock);
|
|
ni_unlock(ni);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_fiemap - file_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,
|
|
.permission = ntfs_permission,
|
|
.get_acl = ntfs_get_acl,
|
|
.set_acl = ntfs_set_acl,
|
|
.fiemap = ntfs_fiemap,
|
|
};
|
|
|
|
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 = generic_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,
|
|
};
|
|
// clang-format on
|