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6022ec6ee2
-----BEGIN PGP SIGNATURE----- iQIzBAABCgAdFiEEh0DEKNP0I9IjwfWEqbAzH4MkB7YFAmOhnJcACgkQqbAzH4Mk B7b1Cg/+LQ0nRKg+wNbT2arR9IPkDob/MTSneciAlI3p0OiAVjhsIMW0Z6O9S1Zp lIbT3cSYkwHmQP4L9N7HRWmBILRo4JunPHbU2NnzsaAq11iqC7H9B4cOzgUEs4fa YlEtTjTsrdpIfO7Uqegkps+2IQK9Omy+9ib2+4Kkcy+ajWTjaiDC8Q/yjEpCcM7F vlQebUGPGD4dzeXj27bBpBRVr5k6mojFfTG5YLWg+UkYN2ENtCmYkiJm2lFO5og/ Ym5zKEQzE4Lt/BFib/P+XmxdQcFRZm4Kt4+16ZCufF2mFSacZgbFQ1TzHEdD9pM7 j/OqdfiXGDR02ZTqcBzqq0P9CJVgbyeOL/Yoaz3akLOYihdFj0UCPar1zWIC4DcQ ZRcsRH0eETcTaREkhv53BJ2JrjWa/AK3yUB8ll4bkGkfno6akA9RoE2qK7+AvC44 jJOz3fbuML9tBDtej6MUkoVeqjA1xOakMkndHDyTLm0HBN62gBnZUNZXXzTdUJrh mQCIyL2bDKE/lc0kEVORFu3xGv/EZzL62VvoHQDznNbT2MHJuzOB3SwkGbLkWAe6 Fhh6ffz99o8wf9zCpF+XMdSb4I7ZcrrAx4efl03dYVllVACM3wNP0AAqJxgmgikP VL4sSOAScioBuijTvF/HRExnSTvb6PwSQk7FWlWNcVsBGHBNp+4= =Xcpx -----END PGP SIGNATURE----- Merge tag 'ntfs3_for_6.2' of https://github.com/Paragon-Software-Group/linux-ntfs3 Pull ntfs3 updates from Konstantin Komarov: - added mount options 'hidedotfiles', 'nocase' and 'windows_names' - fixed xfstests (tested on x86_64): generic/083 generic/263 generic/307 generic/465 - fix some logic errors - code refactoring and dead code removal * tag 'ntfs3_for_6.2' of https://github.com/Paragon-Software-Group/linux-ntfs3: (61 commits) fs/ntfs3: Make if more readable fs/ntfs3: Improve checking of bad clusters fs/ntfs3: Fix wrong if in hdr_first_de fs/ntfs3: Use ALIGN kernel macro fs/ntfs3: Fix incorrect if in ntfs_set_acl_ex fs/ntfs3: Check fields while reading fs/ntfs3: Correct ntfs_check_for_free_space fs/ntfs3: Restore correct state after ENOSPC in attr_data_get_block fs/ntfs3: Changing locking in ntfs_rename fs/ntfs3: Fixing wrong logic in attr_set_size and ntfs_fallocate fs/ntfs3: atomic_open implementation fs/ntfs3: Fix wrong indentations fs/ntfs3: Change new sparse cluster processing fs/ntfs3: Fixing work with sparse clusters fs/ntfs3: Simplify ntfs_update_mftmirr function fs/ntfs3: Remove unused functions fs/ntfs3: Fix sparse problems fs/ntfs3: Add ntfs_bitmap_weight_le function and refactoring fs/ntfs3: Use _le variants of bitops functions fs/ntfs3: Add functions to modify LE bitmaps ...
2083 lines
49 KiB
C
2083 lines
49 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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*/
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#include <linux/buffer_head.h>
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#include <linux/fs.h>
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#include <linux/mpage.h>
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#include <linux/namei.h>
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#include <linux/nls.h>
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#include <linux/uio.h>
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#include <linux/writeback.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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/*
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* ntfs_read_mft - Read record and parses MFT.
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*/
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static struct inode *ntfs_read_mft(struct inode *inode,
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const struct cpu_str *name,
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const struct MFT_REF *ref)
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{
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int err = 0;
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struct ntfs_inode *ni = ntfs_i(inode);
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struct super_block *sb = inode->i_sb;
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struct ntfs_sb_info *sbi = sb->s_fs_info;
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mode_t mode = 0;
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struct ATTR_STD_INFO5 *std5 = NULL;
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struct ATTR_LIST_ENTRY *le;
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struct ATTRIB *attr;
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bool is_match = false;
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bool is_root = false;
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bool is_dir;
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unsigned long ino = inode->i_ino;
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u32 rp_fa = 0, asize, t32;
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u16 roff, rsize, names = 0;
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const struct ATTR_FILE_NAME *fname = NULL;
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const struct INDEX_ROOT *root;
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struct REPARSE_DATA_BUFFER rp; // 0x18 bytes
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u64 t64;
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struct MFT_REC *rec;
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struct runs_tree *run;
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inode->i_op = NULL;
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/* Setup 'uid' and 'gid' */
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inode->i_uid = sbi->options->fs_uid;
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inode->i_gid = sbi->options->fs_gid;
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err = mi_init(&ni->mi, sbi, ino);
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if (err)
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goto out;
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if (!sbi->mft.ni && ino == MFT_REC_MFT && !sb->s_root) {
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t64 = sbi->mft.lbo >> sbi->cluster_bits;
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t32 = bytes_to_cluster(sbi, MFT_REC_VOL * sbi->record_size);
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sbi->mft.ni = ni;
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init_rwsem(&ni->file.run_lock);
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if (!run_add_entry(&ni->file.run, 0, t64, t32, true)) {
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err = -ENOMEM;
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goto out;
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}
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}
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err = mi_read(&ni->mi, ino == MFT_REC_MFT);
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if (err)
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goto out;
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rec = ni->mi.mrec;
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if (sbi->flags & NTFS_FLAGS_LOG_REPLAYING) {
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;
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} else if (ref->seq != rec->seq) {
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err = -EINVAL;
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ntfs_err(sb, "MFT: r=%lx, expect seq=%x instead of %x!", ino,
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le16_to_cpu(ref->seq), le16_to_cpu(rec->seq));
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goto out;
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} else if (!is_rec_inuse(rec)) {
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err = -ESTALE;
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ntfs_err(sb, "Inode r=%x is not in use!", (u32)ino);
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goto out;
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}
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if (le32_to_cpu(rec->total) != sbi->record_size) {
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/* Bad inode? */
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err = -EINVAL;
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goto out;
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}
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if (!is_rec_base(rec)) {
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err = -EINVAL;
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goto out;
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}
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/* Record should contain $I30 root. */
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is_dir = rec->flags & RECORD_FLAG_DIR;
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inode->i_generation = le16_to_cpu(rec->seq);
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/* Enumerate all struct Attributes MFT. */
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le = NULL;
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attr = NULL;
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/*
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* To reduce tab pressure use goto instead of
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* while( (attr = ni_enum_attr_ex(ni, attr, &le, NULL) ))
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*/
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next_attr:
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run = NULL;
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err = -EINVAL;
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attr = ni_enum_attr_ex(ni, attr, &le, NULL);
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if (!attr)
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goto end_enum;
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if (le && le->vcn) {
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/* This is non primary attribute segment. Ignore if not MFT. */
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if (ino != MFT_REC_MFT || attr->type != ATTR_DATA)
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goto next_attr;
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run = &ni->file.run;
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asize = le32_to_cpu(attr->size);
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goto attr_unpack_run;
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}
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roff = attr->non_res ? 0 : le16_to_cpu(attr->res.data_off);
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rsize = attr->non_res ? 0 : le32_to_cpu(attr->res.data_size);
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asize = le32_to_cpu(attr->size);
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if (le16_to_cpu(attr->name_off) + attr->name_len > asize)
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goto out;
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if (attr->non_res) {
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t64 = le64_to_cpu(attr->nres.alloc_size);
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if (le64_to_cpu(attr->nres.data_size) > t64 ||
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le64_to_cpu(attr->nres.valid_size) > t64)
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goto out;
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}
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switch (attr->type) {
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case ATTR_STD:
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if (attr->non_res ||
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asize < sizeof(struct ATTR_STD_INFO) + roff ||
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rsize < sizeof(struct ATTR_STD_INFO))
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goto out;
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if (std5)
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goto next_attr;
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std5 = Add2Ptr(attr, roff);
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#ifdef STATX_BTIME
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nt2kernel(std5->cr_time, &ni->i_crtime);
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#endif
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nt2kernel(std5->a_time, &inode->i_atime);
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nt2kernel(std5->c_time, &inode->i_ctime);
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nt2kernel(std5->m_time, &inode->i_mtime);
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ni->std_fa = std5->fa;
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if (asize >= sizeof(struct ATTR_STD_INFO5) + roff &&
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rsize >= sizeof(struct ATTR_STD_INFO5))
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ni->std_security_id = std5->security_id;
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goto next_attr;
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case ATTR_LIST:
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if (attr->name_len || le || ino == MFT_REC_LOG)
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goto out;
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err = ntfs_load_attr_list(ni, attr);
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if (err)
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goto out;
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le = NULL;
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attr = NULL;
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goto next_attr;
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case ATTR_NAME:
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if (attr->non_res || asize < SIZEOF_ATTRIBUTE_FILENAME + roff ||
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rsize < SIZEOF_ATTRIBUTE_FILENAME)
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goto out;
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fname = Add2Ptr(attr, roff);
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if (fname->type == FILE_NAME_DOS)
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goto next_attr;
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names += 1;
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if (name && name->len == fname->name_len &&
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!ntfs_cmp_names_cpu(name, (struct le_str *)&fname->name_len,
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NULL, false))
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is_match = true;
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goto next_attr;
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case ATTR_DATA:
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if (is_dir) {
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/* Ignore data attribute in dir record. */
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goto next_attr;
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}
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if (ino == MFT_REC_BADCLUST && !attr->non_res)
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goto next_attr;
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if (attr->name_len &&
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((ino != MFT_REC_BADCLUST || !attr->non_res ||
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attr->name_len != ARRAY_SIZE(BAD_NAME) ||
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memcmp(attr_name(attr), BAD_NAME, sizeof(BAD_NAME))) &&
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(ino != MFT_REC_SECURE || !attr->non_res ||
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attr->name_len != ARRAY_SIZE(SDS_NAME) ||
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memcmp(attr_name(attr), SDS_NAME, sizeof(SDS_NAME))))) {
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/* File contains stream attribute. Ignore it. */
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goto next_attr;
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}
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if (is_attr_sparsed(attr))
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ni->std_fa |= FILE_ATTRIBUTE_SPARSE_FILE;
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else
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ni->std_fa &= ~FILE_ATTRIBUTE_SPARSE_FILE;
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if (is_attr_compressed(attr))
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ni->std_fa |= FILE_ATTRIBUTE_COMPRESSED;
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else
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ni->std_fa &= ~FILE_ATTRIBUTE_COMPRESSED;
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if (is_attr_encrypted(attr))
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ni->std_fa |= FILE_ATTRIBUTE_ENCRYPTED;
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else
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ni->std_fa &= ~FILE_ATTRIBUTE_ENCRYPTED;
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if (!attr->non_res) {
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ni->i_valid = inode->i_size = rsize;
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inode_set_bytes(inode, rsize);
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}
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mode = S_IFREG | (0777 & sbi->options->fs_fmask_inv);
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if (!attr->non_res) {
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ni->ni_flags |= NI_FLAG_RESIDENT;
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goto next_attr;
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}
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inode_set_bytes(inode, attr_ondisk_size(attr));
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ni->i_valid = le64_to_cpu(attr->nres.valid_size);
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inode->i_size = le64_to_cpu(attr->nres.data_size);
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if (!attr->nres.alloc_size)
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goto next_attr;
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run = ino == MFT_REC_BITMAP ? &sbi->used.bitmap.run
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: &ni->file.run;
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break;
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case ATTR_ROOT:
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if (attr->non_res)
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goto out;
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root = Add2Ptr(attr, roff);
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is_root = true;
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if (attr->name_len != ARRAY_SIZE(I30_NAME) ||
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memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME)))
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goto next_attr;
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if (root->type != ATTR_NAME ||
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root->rule != NTFS_COLLATION_TYPE_FILENAME)
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goto out;
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if (!is_dir)
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goto next_attr;
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ni->ni_flags |= NI_FLAG_DIR;
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err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30);
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if (err)
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goto out;
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mode = sb->s_root
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? (S_IFDIR | (0777 & sbi->options->fs_dmask_inv))
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: (S_IFDIR | 0777);
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goto next_attr;
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case ATTR_ALLOC:
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if (!is_root || attr->name_len != ARRAY_SIZE(I30_NAME) ||
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memcmp(attr_name(attr), I30_NAME, sizeof(I30_NAME)))
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goto next_attr;
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inode->i_size = le64_to_cpu(attr->nres.data_size);
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ni->i_valid = le64_to_cpu(attr->nres.valid_size);
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inode_set_bytes(inode, le64_to_cpu(attr->nres.alloc_size));
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run = &ni->dir.alloc_run;
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break;
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case ATTR_BITMAP:
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if (ino == MFT_REC_MFT) {
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if (!attr->non_res)
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goto out;
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#ifndef CONFIG_NTFS3_64BIT_CLUSTER
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/* 0x20000000 = 2^32 / 8 */
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if (le64_to_cpu(attr->nres.alloc_size) >= 0x20000000)
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goto out;
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#endif
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run = &sbi->mft.bitmap.run;
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break;
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} else if (is_dir && attr->name_len == ARRAY_SIZE(I30_NAME) &&
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!memcmp(attr_name(attr), I30_NAME,
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sizeof(I30_NAME)) &&
|
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attr->non_res) {
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run = &ni->dir.bitmap_run;
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break;
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}
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goto next_attr;
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|
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case ATTR_REPARSE:
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if (attr->name_len)
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goto next_attr;
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|
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rp_fa = ni_parse_reparse(ni, attr, &rp);
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switch (rp_fa) {
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case REPARSE_LINK:
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/*
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* Normal symlink.
|
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* Assume one unicode symbol == one utf8.
|
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*/
|
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inode->i_size = le16_to_cpu(rp.SymbolicLinkReparseBuffer
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.PrintNameLength) /
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sizeof(u16);
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|
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ni->i_valid = inode->i_size;
|
|
|
|
/* Clear directory bit. */
|
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if (ni->ni_flags & NI_FLAG_DIR) {
|
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indx_clear(&ni->dir);
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|
memset(&ni->dir, 0, sizeof(ni->dir));
|
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ni->ni_flags &= ~NI_FLAG_DIR;
|
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} else {
|
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run_close(&ni->file.run);
|
|
}
|
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mode = S_IFLNK | 0777;
|
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is_dir = false;
|
|
if (attr->non_res) {
|
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run = &ni->file.run;
|
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goto attr_unpack_run; // Double break.
|
|
}
|
|
break;
|
|
|
|
case REPARSE_COMPRESSED:
|
|
break;
|
|
|
|
case REPARSE_DEDUPLICATED:
|
|
break;
|
|
}
|
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goto next_attr;
|
|
|
|
case ATTR_EA_INFO:
|
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if (!attr->name_len &&
|
|
resident_data_ex(attr, sizeof(struct EA_INFO))) {
|
|
ni->ni_flags |= NI_FLAG_EA;
|
|
/*
|
|
* ntfs_get_wsl_perm updates inode->i_uid, inode->i_gid, inode->i_mode
|
|
*/
|
|
inode->i_mode = mode;
|
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ntfs_get_wsl_perm(inode);
|
|
mode = inode->i_mode;
|
|
}
|
|
goto next_attr;
|
|
|
|
default:
|
|
goto next_attr;
|
|
}
|
|
|
|
attr_unpack_run:
|
|
roff = le16_to_cpu(attr->nres.run_off);
|
|
|
|
if (roff > asize) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
t64 = le64_to_cpu(attr->nres.svcn);
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|
|
|
err = run_unpack_ex(run, sbi, ino, t64, le64_to_cpu(attr->nres.evcn),
|
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t64, Add2Ptr(attr, roff), asize - roff);
|
|
if (err < 0)
|
|
goto out;
|
|
err = 0;
|
|
goto next_attr;
|
|
|
|
end_enum:
|
|
|
|
if (!std5)
|
|
goto out;
|
|
|
|
if (!is_match && name) {
|
|
/* Reuse rec as buffer for ascii name. */
|
|
err = -ENOENT;
|
|
goto out;
|
|
}
|
|
|
|
if (std5->fa & FILE_ATTRIBUTE_READONLY)
|
|
mode &= ~0222;
|
|
|
|
if (!names) {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (names != le16_to_cpu(rec->hard_links)) {
|
|
/* Correct minor error on the fly. Do not mark inode as dirty. */
|
|
rec->hard_links = cpu_to_le16(names);
|
|
ni->mi.dirty = true;
|
|
}
|
|
|
|
set_nlink(inode, names);
|
|
|
|
if (S_ISDIR(mode)) {
|
|
ni->std_fa |= FILE_ATTRIBUTE_DIRECTORY;
|
|
|
|
/*
|
|
* Dot and dot-dot should be included in count but was not
|
|
* included in enumeration.
|
|
* Usually a hard links to directories are disabled.
|
|
*/
|
|
inode->i_op = &ntfs_dir_inode_operations;
|
|
inode->i_fop = &ntfs_dir_operations;
|
|
ni->i_valid = 0;
|
|
} else if (S_ISLNK(mode)) {
|
|
ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY;
|
|
inode->i_op = &ntfs_link_inode_operations;
|
|
inode->i_fop = NULL;
|
|
inode_nohighmem(inode);
|
|
} else if (S_ISREG(mode)) {
|
|
ni->std_fa &= ~FILE_ATTRIBUTE_DIRECTORY;
|
|
inode->i_op = &ntfs_file_inode_operations;
|
|
inode->i_fop = &ntfs_file_operations;
|
|
inode->i_mapping->a_ops =
|
|
is_compressed(ni) ? &ntfs_aops_cmpr : &ntfs_aops;
|
|
if (ino != MFT_REC_MFT)
|
|
init_rwsem(&ni->file.run_lock);
|
|
} else if (S_ISCHR(mode) || S_ISBLK(mode) || S_ISFIFO(mode) ||
|
|
S_ISSOCK(mode)) {
|
|
inode->i_op = &ntfs_special_inode_operations;
|
|
init_special_inode(inode, mode, inode->i_rdev);
|
|
} else if (fname && fname->home.low == cpu_to_le32(MFT_REC_EXTEND) &&
|
|
fname->home.seq == cpu_to_le16(MFT_REC_EXTEND)) {
|
|
/* Records in $Extend are not a files or general directories. */
|
|
inode->i_op = &ntfs_file_inode_operations;
|
|
} else {
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if ((sbi->options->sys_immutable &&
|
|
(std5->fa & FILE_ATTRIBUTE_SYSTEM)) &&
|
|
!S_ISFIFO(mode) && !S_ISSOCK(mode) && !S_ISLNK(mode)) {
|
|
inode->i_flags |= S_IMMUTABLE;
|
|
} else {
|
|
inode->i_flags &= ~S_IMMUTABLE;
|
|
}
|
|
|
|
inode->i_mode = mode;
|
|
if (!(ni->ni_flags & NI_FLAG_EA)) {
|
|
/* If no xattr then no security (stored in xattr). */
|
|
inode->i_flags |= S_NOSEC;
|
|
}
|
|
|
|
if (ino == MFT_REC_MFT && !sb->s_root)
|
|
sbi->mft.ni = NULL;
|
|
|
|
unlock_new_inode(inode);
|
|
|
|
return inode;
|
|
|
|
out:
|
|
if (ino == MFT_REC_MFT && !sb->s_root)
|
|
sbi->mft.ni = NULL;
|
|
|
|
iget_failed(inode);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
/*
|
|
* ntfs_test_inode
|
|
*
|
|
* Return: 1 if match.
|
|
*/
|
|
static int ntfs_test_inode(struct inode *inode, void *data)
|
|
{
|
|
struct MFT_REF *ref = data;
|
|
|
|
return ino_get(ref) == inode->i_ino;
|
|
}
|
|
|
|
static int ntfs_set_inode(struct inode *inode, void *data)
|
|
{
|
|
const struct MFT_REF *ref = data;
|
|
|
|
inode->i_ino = ino_get(ref);
|
|
return 0;
|
|
}
|
|
|
|
struct inode *ntfs_iget5(struct super_block *sb, const struct MFT_REF *ref,
|
|
const struct cpu_str *name)
|
|
{
|
|
struct inode *inode;
|
|
|
|
inode = iget5_locked(sb, ino_get(ref), ntfs_test_inode, ntfs_set_inode,
|
|
(void *)ref);
|
|
if (unlikely(!inode))
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
/* If this is a freshly allocated inode, need to read it now. */
|
|
if (inode->i_state & I_NEW)
|
|
inode = ntfs_read_mft(inode, name, ref);
|
|
else if (ref->seq != ntfs_i(inode)->mi.mrec->seq) {
|
|
/* Inode overlaps? */
|
|
_ntfs_bad_inode(inode);
|
|
}
|
|
|
|
if (IS_ERR(inode) && name)
|
|
ntfs_set_state(sb->s_fs_info, NTFS_DIRTY_ERROR);
|
|
|
|
return inode;
|
|
}
|
|
|
|
enum get_block_ctx {
|
|
GET_BLOCK_GENERAL = 0,
|
|
GET_BLOCK_WRITE_BEGIN = 1,
|
|
GET_BLOCK_DIRECT_IO_R = 2,
|
|
GET_BLOCK_DIRECT_IO_W = 3,
|
|
GET_BLOCK_BMAP = 4,
|
|
};
|
|
|
|
static noinline int ntfs_get_block_vbo(struct inode *inode, u64 vbo,
|
|
struct buffer_head *bh, int create,
|
|
enum get_block_ctx ctx)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
struct page *page = bh->b_page;
|
|
u8 cluster_bits = sbi->cluster_bits;
|
|
u32 block_size = sb->s_blocksize;
|
|
u64 bytes, lbo, valid;
|
|
u32 off;
|
|
int err;
|
|
CLST vcn, lcn, len;
|
|
bool new;
|
|
|
|
/* Clear previous state. */
|
|
clear_buffer_new(bh);
|
|
clear_buffer_uptodate(bh);
|
|
|
|
if (is_resident(ni)) {
|
|
ni_lock(ni);
|
|
err = attr_data_read_resident(ni, page);
|
|
ni_unlock(ni);
|
|
|
|
if (!err)
|
|
set_buffer_uptodate(bh);
|
|
bh->b_size = block_size;
|
|
return err;
|
|
}
|
|
|
|
vcn = vbo >> cluster_bits;
|
|
off = vbo & sbi->cluster_mask;
|
|
new = false;
|
|
|
|
err = attr_data_get_block(ni, vcn, 1, &lcn, &len, create ? &new : NULL,
|
|
create && sbi->cluster_size > PAGE_SIZE);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (!len)
|
|
return 0;
|
|
|
|
bytes = ((u64)len << cluster_bits) - off;
|
|
|
|
if (lcn == SPARSE_LCN) {
|
|
if (!create) {
|
|
if (bh->b_size > bytes)
|
|
bh->b_size = bytes;
|
|
return 0;
|
|
}
|
|
WARN_ON(1);
|
|
}
|
|
|
|
if (new)
|
|
set_buffer_new(bh);
|
|
|
|
lbo = ((u64)lcn << cluster_bits) + off;
|
|
|
|
set_buffer_mapped(bh);
|
|
bh->b_bdev = sb->s_bdev;
|
|
bh->b_blocknr = lbo >> sb->s_blocksize_bits;
|
|
|
|
valid = ni->i_valid;
|
|
|
|
if (ctx == GET_BLOCK_DIRECT_IO_W) {
|
|
/* ntfs_direct_IO will update ni->i_valid. */
|
|
if (vbo >= valid)
|
|
set_buffer_new(bh);
|
|
} else if (create) {
|
|
/* Normal write. */
|
|
if (bytes > bh->b_size)
|
|
bytes = bh->b_size;
|
|
|
|
if (vbo >= valid)
|
|
set_buffer_new(bh);
|
|
|
|
if (vbo + bytes > valid) {
|
|
ni->i_valid = vbo + bytes;
|
|
mark_inode_dirty(inode);
|
|
}
|
|
} else if (vbo >= valid) {
|
|
/* Read out of valid data. */
|
|
clear_buffer_mapped(bh);
|
|
} else if (vbo + bytes <= valid) {
|
|
/* Normal read. */
|
|
} else if (vbo + block_size <= valid) {
|
|
/* Normal short read. */
|
|
bytes = block_size;
|
|
} else {
|
|
/*
|
|
* Read across valid size: vbo < valid && valid < vbo + block_size
|
|
*/
|
|
bytes = block_size;
|
|
|
|
if (page) {
|
|
u32 voff = valid - vbo;
|
|
|
|
bh->b_size = block_size;
|
|
off = vbo & (PAGE_SIZE - 1);
|
|
set_bh_page(bh, page, off);
|
|
err = bh_read(bh, 0);
|
|
if (err < 0)
|
|
goto out;
|
|
zero_user_segment(page, off + voff, off + block_size);
|
|
}
|
|
}
|
|
|
|
if (bh->b_size > bytes)
|
|
bh->b_size = bytes;
|
|
|
|
#ifndef __LP64__
|
|
if (ctx == GET_BLOCK_DIRECT_IO_W || ctx == GET_BLOCK_DIRECT_IO_R) {
|
|
static_assert(sizeof(size_t) < sizeof(loff_t));
|
|
if (bytes > 0x40000000u)
|
|
bh->b_size = 0x40000000u;
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
int ntfs_get_block(struct inode *inode, sector_t vbn,
|
|
struct buffer_head *bh_result, int create)
|
|
{
|
|
return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits,
|
|
bh_result, create, GET_BLOCK_GENERAL);
|
|
}
|
|
|
|
static int ntfs_get_block_bmap(struct inode *inode, sector_t vsn,
|
|
struct buffer_head *bh_result, int create)
|
|
{
|
|
return ntfs_get_block_vbo(inode,
|
|
(u64)vsn << inode->i_sb->s_blocksize_bits,
|
|
bh_result, create, GET_BLOCK_BMAP);
|
|
}
|
|
|
|
static sector_t ntfs_bmap(struct address_space *mapping, sector_t block)
|
|
{
|
|
return generic_block_bmap(mapping, block, ntfs_get_block_bmap);
|
|
}
|
|
|
|
static int ntfs_read_folio(struct file *file, struct folio *folio)
|
|
{
|
|
struct page *page = &folio->page;
|
|
int err;
|
|
struct address_space *mapping = page->mapping;
|
|
struct inode *inode = mapping->host;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
|
|
if (is_resident(ni)) {
|
|
ni_lock(ni);
|
|
err = attr_data_read_resident(ni, page);
|
|
ni_unlock(ni);
|
|
if (err != E_NTFS_NONRESIDENT) {
|
|
unlock_page(page);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
if (is_compressed(ni)) {
|
|
ni_lock(ni);
|
|
err = ni_readpage_cmpr(ni, page);
|
|
ni_unlock(ni);
|
|
return err;
|
|
}
|
|
|
|
/* Normal + sparse files. */
|
|
return mpage_read_folio(folio, ntfs_get_block);
|
|
}
|
|
|
|
static void ntfs_readahead(struct readahead_control *rac)
|
|
{
|
|
struct address_space *mapping = rac->mapping;
|
|
struct inode *inode = mapping->host;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
u64 valid;
|
|
loff_t pos;
|
|
|
|
if (is_resident(ni)) {
|
|
/* No readahead for resident. */
|
|
return;
|
|
}
|
|
|
|
if (is_compressed(ni)) {
|
|
/* No readahead for compressed. */
|
|
return;
|
|
}
|
|
|
|
valid = ni->i_valid;
|
|
pos = readahead_pos(rac);
|
|
|
|
if (valid < i_size_read(inode) && pos <= valid &&
|
|
valid < pos + readahead_length(rac)) {
|
|
/* Range cross 'valid'. Read it page by page. */
|
|
return;
|
|
}
|
|
|
|
mpage_readahead(rac, ntfs_get_block);
|
|
}
|
|
|
|
static int ntfs_get_block_direct_IO_R(struct inode *inode, sector_t iblock,
|
|
struct buffer_head *bh_result, int create)
|
|
{
|
|
return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits,
|
|
bh_result, create, GET_BLOCK_DIRECT_IO_R);
|
|
}
|
|
|
|
static int ntfs_get_block_direct_IO_W(struct inode *inode, sector_t iblock,
|
|
struct buffer_head *bh_result, int create)
|
|
{
|
|
return ntfs_get_block_vbo(inode, (u64)iblock << inode->i_blkbits,
|
|
bh_result, create, GET_BLOCK_DIRECT_IO_W);
|
|
}
|
|
|
|
static ssize_t ntfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
|
|
{
|
|
struct file *file = iocb->ki_filp;
|
|
struct address_space *mapping = file->f_mapping;
|
|
struct inode *inode = mapping->host;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
loff_t vbo = iocb->ki_pos;
|
|
loff_t end;
|
|
int wr = iov_iter_rw(iter) & WRITE;
|
|
size_t iter_count = iov_iter_count(iter);
|
|
loff_t valid;
|
|
ssize_t ret;
|
|
|
|
if (is_resident(ni)) {
|
|
/* Switch to buffered write. */
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
ret = blockdev_direct_IO(iocb, inode, iter,
|
|
wr ? ntfs_get_block_direct_IO_W
|
|
: ntfs_get_block_direct_IO_R);
|
|
|
|
if (ret > 0)
|
|
end = vbo + ret;
|
|
else if (wr && ret == -EIOCBQUEUED)
|
|
end = vbo + iter_count;
|
|
else
|
|
goto out;
|
|
|
|
valid = ni->i_valid;
|
|
if (wr) {
|
|
if (end > valid && !S_ISBLK(inode->i_mode)) {
|
|
ni->i_valid = end;
|
|
mark_inode_dirty(inode);
|
|
}
|
|
} else if (vbo < valid && valid < end) {
|
|
/* Fix page. */
|
|
iov_iter_revert(iter, end - valid);
|
|
iov_iter_zero(end - valid, iter);
|
|
}
|
|
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
int ntfs_set_size(struct inode *inode, u64 new_size)
|
|
{
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
int err;
|
|
|
|
/* Check for maximum file size. */
|
|
if (is_sparsed(ni) || is_compressed(ni)) {
|
|
if (new_size > sbi->maxbytes_sparse) {
|
|
err = -EFBIG;
|
|
goto out;
|
|
}
|
|
} else if (new_size > sbi->maxbytes) {
|
|
err = -EFBIG;
|
|
goto out;
|
|
}
|
|
|
|
ni_lock(ni);
|
|
down_write(&ni->file.run_lock);
|
|
|
|
err = attr_set_size(ni, ATTR_DATA, NULL, 0, &ni->file.run, new_size,
|
|
&ni->i_valid, true, NULL);
|
|
|
|
up_write(&ni->file.run_lock);
|
|
ni_unlock(ni);
|
|
|
|
mark_inode_dirty(inode);
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static int ntfs_writepage(struct page *page, struct writeback_control *wbc)
|
|
{
|
|
struct address_space *mapping = page->mapping;
|
|
struct inode *inode = mapping->host;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
int err;
|
|
|
|
if (is_resident(ni)) {
|
|
ni_lock(ni);
|
|
err = attr_data_write_resident(ni, page);
|
|
ni_unlock(ni);
|
|
if (err != E_NTFS_NONRESIDENT) {
|
|
unlock_page(page);
|
|
return err;
|
|
}
|
|
}
|
|
|
|
return block_write_full_page(page, ntfs_get_block, wbc);
|
|
}
|
|
|
|
static int ntfs_writepages(struct address_space *mapping,
|
|
struct writeback_control *wbc)
|
|
{
|
|
/* Redirect call to 'ntfs_writepage' for resident files. */
|
|
if (is_resident(ntfs_i(mapping->host)))
|
|
return generic_writepages(mapping, wbc);
|
|
return mpage_writepages(mapping, wbc, ntfs_get_block);
|
|
}
|
|
|
|
static int ntfs_get_block_write_begin(struct inode *inode, sector_t vbn,
|
|
struct buffer_head *bh_result, int create)
|
|
{
|
|
return ntfs_get_block_vbo(inode, (u64)vbn << inode->i_blkbits,
|
|
bh_result, create, GET_BLOCK_WRITE_BEGIN);
|
|
}
|
|
|
|
int ntfs_write_begin(struct file *file, struct address_space *mapping,
|
|
loff_t pos, u32 len, struct page **pagep, void **fsdata)
|
|
{
|
|
int err;
|
|
struct inode *inode = mapping->host;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
|
|
*pagep = NULL;
|
|
if (is_resident(ni)) {
|
|
struct page *page = grab_cache_page_write_begin(
|
|
mapping, pos >> PAGE_SHIFT);
|
|
|
|
if (!page) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
ni_lock(ni);
|
|
err = attr_data_read_resident(ni, page);
|
|
ni_unlock(ni);
|
|
|
|
if (!err) {
|
|
*pagep = page;
|
|
goto out;
|
|
}
|
|
unlock_page(page);
|
|
put_page(page);
|
|
|
|
if (err != E_NTFS_NONRESIDENT)
|
|
goto out;
|
|
}
|
|
|
|
err = block_write_begin(mapping, pos, len, pagep,
|
|
ntfs_get_block_write_begin);
|
|
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_write_end - Address_space_operations::write_end.
|
|
*/
|
|
int ntfs_write_end(struct file *file, struct address_space *mapping,
|
|
loff_t pos, u32 len, u32 copied, struct page *page,
|
|
void *fsdata)
|
|
{
|
|
struct inode *inode = mapping->host;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
u64 valid = ni->i_valid;
|
|
bool dirty = false;
|
|
int err;
|
|
|
|
if (is_resident(ni)) {
|
|
ni_lock(ni);
|
|
err = attr_data_write_resident(ni, page);
|
|
ni_unlock(ni);
|
|
if (!err) {
|
|
dirty = true;
|
|
/* Clear any buffers in page. */
|
|
if (page_has_buffers(page)) {
|
|
struct buffer_head *head, *bh;
|
|
|
|
bh = head = page_buffers(page);
|
|
do {
|
|
clear_buffer_dirty(bh);
|
|
clear_buffer_mapped(bh);
|
|
set_buffer_uptodate(bh);
|
|
} while (head != (bh = bh->b_this_page));
|
|
}
|
|
SetPageUptodate(page);
|
|
err = copied;
|
|
}
|
|
unlock_page(page);
|
|
put_page(page);
|
|
} else {
|
|
err = generic_write_end(file, mapping, pos, len, copied, page,
|
|
fsdata);
|
|
}
|
|
|
|
if (err >= 0) {
|
|
if (!(ni->std_fa & FILE_ATTRIBUTE_ARCHIVE)) {
|
|
inode->i_ctime = inode->i_mtime = current_time(inode);
|
|
ni->std_fa |= FILE_ATTRIBUTE_ARCHIVE;
|
|
dirty = true;
|
|
}
|
|
|
|
if (valid != ni->i_valid) {
|
|
/* ni->i_valid is changed in ntfs_get_block_vbo. */
|
|
dirty = true;
|
|
}
|
|
|
|
if (pos + err > inode->i_size) {
|
|
inode->i_size = pos + err;
|
|
dirty = true;
|
|
}
|
|
|
|
if (dirty)
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int reset_log_file(struct inode *inode)
|
|
{
|
|
int err;
|
|
loff_t pos = 0;
|
|
u32 log_size = inode->i_size;
|
|
struct address_space *mapping = inode->i_mapping;
|
|
|
|
for (;;) {
|
|
u32 len;
|
|
void *kaddr;
|
|
struct page *page;
|
|
|
|
len = pos + PAGE_SIZE > log_size ? (log_size - pos) : PAGE_SIZE;
|
|
|
|
err = block_write_begin(mapping, pos, len, &page,
|
|
ntfs_get_block_write_begin);
|
|
if (err)
|
|
goto out;
|
|
|
|
kaddr = kmap_atomic(page);
|
|
memset(kaddr, -1, len);
|
|
kunmap_atomic(kaddr);
|
|
flush_dcache_page(page);
|
|
|
|
err = block_write_end(NULL, mapping, pos, len, len, page, NULL);
|
|
if (err < 0)
|
|
goto out;
|
|
pos += len;
|
|
|
|
if (pos >= log_size)
|
|
break;
|
|
balance_dirty_pages_ratelimited(mapping);
|
|
}
|
|
out:
|
|
mark_inode_dirty_sync(inode);
|
|
|
|
return err;
|
|
}
|
|
|
|
int ntfs3_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
return _ni_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
|
|
}
|
|
|
|
int ntfs_sync_inode(struct inode *inode)
|
|
{
|
|
return _ni_write_inode(inode, 1);
|
|
}
|
|
|
|
/*
|
|
* writeback_inode - Helper function for ntfs_flush_inodes().
|
|
*
|
|
* This writes both the inode and the file data blocks, waiting
|
|
* for in flight data blocks before the start of the call. It
|
|
* does not wait for any io started during the call.
|
|
*/
|
|
static int writeback_inode(struct inode *inode)
|
|
{
|
|
int ret = sync_inode_metadata(inode, 0);
|
|
|
|
if (!ret)
|
|
ret = filemap_fdatawrite(inode->i_mapping);
|
|
return ret;
|
|
}
|
|
|
|
/*
|
|
* ntfs_flush_inodes
|
|
*
|
|
* Write data and metadata corresponding to i1 and i2. The io is
|
|
* started but we do not wait for any of it to finish.
|
|
*
|
|
* filemap_flush() is used for the block device, so if there is a dirty
|
|
* page for a block already in flight, we will not wait and start the
|
|
* io over again.
|
|
*/
|
|
int ntfs_flush_inodes(struct super_block *sb, struct inode *i1,
|
|
struct inode *i2)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (i1)
|
|
ret = writeback_inode(i1);
|
|
if (!ret && i2)
|
|
ret = writeback_inode(i2);
|
|
if (!ret)
|
|
ret = sync_blockdev_nowait(sb->s_bdev);
|
|
return ret;
|
|
}
|
|
|
|
int inode_write_data(struct inode *inode, const void *data, size_t bytes)
|
|
{
|
|
pgoff_t idx;
|
|
|
|
/* Write non resident data. */
|
|
for (idx = 0; bytes; idx++) {
|
|
size_t op = bytes > PAGE_SIZE ? PAGE_SIZE : bytes;
|
|
struct page *page = ntfs_map_page(inode->i_mapping, idx);
|
|
|
|
if (IS_ERR(page))
|
|
return PTR_ERR(page);
|
|
|
|
lock_page(page);
|
|
WARN_ON(!PageUptodate(page));
|
|
ClearPageUptodate(page);
|
|
|
|
memcpy(page_address(page), data, op);
|
|
|
|
flush_dcache_page(page);
|
|
SetPageUptodate(page);
|
|
unlock_page(page);
|
|
|
|
ntfs_unmap_page(page);
|
|
|
|
bytes -= op;
|
|
data = Add2Ptr(data, PAGE_SIZE);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ntfs_reparse_bytes
|
|
*
|
|
* Number of bytes for REPARSE_DATA_BUFFER(IO_REPARSE_TAG_SYMLINK)
|
|
* for unicode string of @uni_len length.
|
|
*/
|
|
static inline u32 ntfs_reparse_bytes(u32 uni_len)
|
|
{
|
|
/* Header + unicode string + decorated unicode string. */
|
|
return sizeof(short) * (2 * uni_len + 4) +
|
|
offsetof(struct REPARSE_DATA_BUFFER,
|
|
SymbolicLinkReparseBuffer.PathBuffer);
|
|
}
|
|
|
|
static struct REPARSE_DATA_BUFFER *
|
|
ntfs_create_reparse_buffer(struct ntfs_sb_info *sbi, const char *symname,
|
|
u32 size, u16 *nsize)
|
|
{
|
|
int i, err;
|
|
struct REPARSE_DATA_BUFFER *rp;
|
|
__le16 *rp_name;
|
|
typeof(rp->SymbolicLinkReparseBuffer) *rs;
|
|
|
|
rp = kzalloc(ntfs_reparse_bytes(2 * size + 2), GFP_NOFS);
|
|
if (!rp)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
rs = &rp->SymbolicLinkReparseBuffer;
|
|
rp_name = rs->PathBuffer;
|
|
|
|
/* Convert link name to UTF-16. */
|
|
err = ntfs_nls_to_utf16(sbi, symname, size,
|
|
(struct cpu_str *)(rp_name - 1), 2 * size,
|
|
UTF16_LITTLE_ENDIAN);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
/* err = the length of unicode name of symlink. */
|
|
*nsize = ntfs_reparse_bytes(err);
|
|
|
|
if (*nsize > sbi->reparse.max_size) {
|
|
err = -EFBIG;
|
|
goto out;
|
|
}
|
|
|
|
/* Translate Linux '/' into Windows '\'. */
|
|
for (i = 0; i < err; i++) {
|
|
if (rp_name[i] == cpu_to_le16('/'))
|
|
rp_name[i] = cpu_to_le16('\\');
|
|
}
|
|
|
|
rp->ReparseTag = IO_REPARSE_TAG_SYMLINK;
|
|
rp->ReparseDataLength =
|
|
cpu_to_le16(*nsize - offsetof(struct REPARSE_DATA_BUFFER,
|
|
SymbolicLinkReparseBuffer));
|
|
|
|
/* PrintName + SubstituteName. */
|
|
rs->SubstituteNameOffset = cpu_to_le16(sizeof(short) * err);
|
|
rs->SubstituteNameLength = cpu_to_le16(sizeof(short) * err + 8);
|
|
rs->PrintNameLength = rs->SubstituteNameOffset;
|
|
|
|
/*
|
|
* TODO: Use relative path if possible to allow Windows to
|
|
* parse this path.
|
|
* 0-absolute path 1- relative path (SYMLINK_FLAG_RELATIVE).
|
|
*/
|
|
rs->Flags = 0;
|
|
|
|
memmove(rp_name + err + 4, rp_name, sizeof(short) * err);
|
|
|
|
/* Decorate SubstituteName. */
|
|
rp_name += err;
|
|
rp_name[0] = cpu_to_le16('\\');
|
|
rp_name[1] = cpu_to_le16('?');
|
|
rp_name[2] = cpu_to_le16('?');
|
|
rp_name[3] = cpu_to_le16('\\');
|
|
|
|
return rp;
|
|
out:
|
|
kfree(rp);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
/*
|
|
* ntfs_create_inode
|
|
*
|
|
* Helper function for:
|
|
* - ntfs_create
|
|
* - ntfs_mknod
|
|
* - ntfs_symlink
|
|
* - ntfs_mkdir
|
|
* - ntfs_atomic_open
|
|
*
|
|
* NOTE: if fnd != NULL (ntfs_atomic_open) then @dir is locked
|
|
*/
|
|
struct inode *ntfs_create_inode(struct user_namespace *mnt_userns,
|
|
struct inode *dir, struct dentry *dentry,
|
|
const struct cpu_str *uni, umode_t mode,
|
|
dev_t dev, const char *symname, u32 size,
|
|
struct ntfs_fnd *fnd)
|
|
{
|
|
int err;
|
|
struct super_block *sb = dir->i_sb;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
const struct qstr *name = &dentry->d_name;
|
|
CLST ino = 0;
|
|
struct ntfs_inode *dir_ni = ntfs_i(dir);
|
|
struct ntfs_inode *ni = NULL;
|
|
struct inode *inode = NULL;
|
|
struct ATTRIB *attr;
|
|
struct ATTR_STD_INFO5 *std5;
|
|
struct ATTR_FILE_NAME *fname;
|
|
struct MFT_REC *rec;
|
|
u32 asize, dsize, sd_size;
|
|
enum FILE_ATTRIBUTE fa;
|
|
__le32 security_id = SECURITY_ID_INVALID;
|
|
CLST vcn;
|
|
const void *sd;
|
|
u16 t16, nsize = 0, aid = 0;
|
|
struct INDEX_ROOT *root, *dir_root;
|
|
struct NTFS_DE *e, *new_de = NULL;
|
|
struct REPARSE_DATA_BUFFER *rp = NULL;
|
|
bool rp_inserted = false;
|
|
|
|
if (!fnd)
|
|
ni_lock_dir(dir_ni);
|
|
|
|
dir_root = indx_get_root(&dir_ni->dir, dir_ni, NULL, NULL);
|
|
if (!dir_root) {
|
|
err = -EINVAL;
|
|
goto out1;
|
|
}
|
|
|
|
if (S_ISDIR(mode)) {
|
|
/* Use parent's directory attributes. */
|
|
fa = dir_ni->std_fa | FILE_ATTRIBUTE_DIRECTORY |
|
|
FILE_ATTRIBUTE_ARCHIVE;
|
|
/*
|
|
* By default child directory inherits parent attributes.
|
|
* Root directory is hidden + system.
|
|
* Make an exception for children in root.
|
|
*/
|
|
if (dir->i_ino == MFT_REC_ROOT)
|
|
fa &= ~(FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM);
|
|
} else if (S_ISLNK(mode)) {
|
|
/* It is good idea that link should be the same type (file/dir) as target */
|
|
fa = FILE_ATTRIBUTE_REPARSE_POINT;
|
|
|
|
/*
|
|
* Linux: there are dir/file/symlink and so on.
|
|
* NTFS: symlinks are "dir + reparse" or "file + reparse"
|
|
* It is good idea to create:
|
|
* dir + reparse if 'symname' points to directory
|
|
* or
|
|
* file + reparse if 'symname' points to file
|
|
* Unfortunately kern_path hangs if symname contains 'dir'.
|
|
*/
|
|
|
|
/*
|
|
* struct path path;
|
|
*
|
|
* if (!kern_path(symname, LOOKUP_FOLLOW, &path)){
|
|
* struct inode *target = d_inode(path.dentry);
|
|
*
|
|
* if (S_ISDIR(target->i_mode))
|
|
* fa |= FILE_ATTRIBUTE_DIRECTORY;
|
|
* // if ( target->i_sb == sb ){
|
|
* // use relative path?
|
|
* // }
|
|
* path_put(&path);
|
|
* }
|
|
*/
|
|
} else if (S_ISREG(mode)) {
|
|
if (sbi->options->sparse) {
|
|
/* Sparsed regular file, cause option 'sparse'. */
|
|
fa = FILE_ATTRIBUTE_SPARSE_FILE |
|
|
FILE_ATTRIBUTE_ARCHIVE;
|
|
} else if (dir_ni->std_fa & FILE_ATTRIBUTE_COMPRESSED) {
|
|
/* Compressed regular file, if parent is compressed. */
|
|
fa = FILE_ATTRIBUTE_COMPRESSED | FILE_ATTRIBUTE_ARCHIVE;
|
|
} else {
|
|
/* Regular file, default attributes. */
|
|
fa = FILE_ATTRIBUTE_ARCHIVE;
|
|
}
|
|
} else {
|
|
fa = FILE_ATTRIBUTE_ARCHIVE;
|
|
}
|
|
|
|
/* If option "hide_dot_files" then set hidden attribute for dot files. */
|
|
if (sbi->options->hide_dot_files && name->name[0] == '.')
|
|
fa |= FILE_ATTRIBUTE_HIDDEN;
|
|
|
|
if (!(mode & 0222))
|
|
fa |= FILE_ATTRIBUTE_READONLY;
|
|
|
|
/* Allocate PATH_MAX bytes. */
|
|
new_de = __getname();
|
|
if (!new_de) {
|
|
err = -ENOMEM;
|
|
goto out1;
|
|
}
|
|
|
|
/* Mark rw ntfs as dirty. it will be cleared at umount. */
|
|
ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
|
|
|
|
/* Step 1: allocate and fill new mft record. */
|
|
err = ntfs_look_free_mft(sbi, &ino, false, NULL, NULL);
|
|
if (err)
|
|
goto out2;
|
|
|
|
ni = ntfs_new_inode(sbi, ino, fa & FILE_ATTRIBUTE_DIRECTORY);
|
|
if (IS_ERR(ni)) {
|
|
err = PTR_ERR(ni);
|
|
ni = NULL;
|
|
goto out3;
|
|
}
|
|
inode = &ni->vfs_inode;
|
|
inode_init_owner(mnt_userns, inode, dir, mode);
|
|
mode = inode->i_mode;
|
|
|
|
inode->i_atime = inode->i_mtime = inode->i_ctime = ni->i_crtime =
|
|
current_time(inode);
|
|
|
|
rec = ni->mi.mrec;
|
|
rec->hard_links = cpu_to_le16(1);
|
|
attr = Add2Ptr(rec, le16_to_cpu(rec->attr_off));
|
|
|
|
/* Get default security id. */
|
|
sd = s_default_security;
|
|
sd_size = sizeof(s_default_security);
|
|
|
|
if (is_ntfs3(sbi)) {
|
|
security_id = dir_ni->std_security_id;
|
|
if (le32_to_cpu(security_id) < SECURITY_ID_FIRST) {
|
|
security_id = sbi->security.def_security_id;
|
|
|
|
if (security_id == SECURITY_ID_INVALID &&
|
|
!ntfs_insert_security(sbi, sd, sd_size,
|
|
&security_id, NULL))
|
|
sbi->security.def_security_id = security_id;
|
|
}
|
|
}
|
|
|
|
/* Insert standard info. */
|
|
std5 = Add2Ptr(attr, SIZEOF_RESIDENT);
|
|
|
|
if (security_id == SECURITY_ID_INVALID) {
|
|
dsize = sizeof(struct ATTR_STD_INFO);
|
|
} else {
|
|
dsize = sizeof(struct ATTR_STD_INFO5);
|
|
std5->security_id = security_id;
|
|
ni->std_security_id = security_id;
|
|
}
|
|
asize = SIZEOF_RESIDENT + dsize;
|
|
|
|
attr->type = ATTR_STD;
|
|
attr->size = cpu_to_le32(asize);
|
|
attr->id = cpu_to_le16(aid++);
|
|
attr->res.data_off = SIZEOF_RESIDENT_LE;
|
|
attr->res.data_size = cpu_to_le32(dsize);
|
|
|
|
std5->cr_time = std5->m_time = std5->c_time = std5->a_time =
|
|
kernel2nt(&inode->i_atime);
|
|
|
|
ni->std_fa = fa;
|
|
std5->fa = fa;
|
|
|
|
attr = Add2Ptr(attr, asize);
|
|
|
|
/* Insert file name. */
|
|
err = fill_name_de(sbi, new_de, name, uni);
|
|
if (err)
|
|
goto out4;
|
|
|
|
mi_get_ref(&ni->mi, &new_de->ref);
|
|
|
|
fname = (struct ATTR_FILE_NAME *)(new_de + 1);
|
|
|
|
if (sbi->options->windows_names &&
|
|
!valid_windows_name(sbi, (struct le_str *)&fname->name_len)) {
|
|
err = -EINVAL;
|
|
goto out4;
|
|
}
|
|
|
|
mi_get_ref(&dir_ni->mi, &fname->home);
|
|
fname->dup.cr_time = fname->dup.m_time = fname->dup.c_time =
|
|
fname->dup.a_time = std5->cr_time;
|
|
fname->dup.alloc_size = fname->dup.data_size = 0;
|
|
fname->dup.fa = std5->fa;
|
|
fname->dup.ea_size = fname->dup.reparse = 0;
|
|
|
|
dsize = le16_to_cpu(new_de->key_size);
|
|
asize = ALIGN(SIZEOF_RESIDENT + dsize, 8);
|
|
|
|
attr->type = ATTR_NAME;
|
|
attr->size = cpu_to_le32(asize);
|
|
attr->res.data_off = SIZEOF_RESIDENT_LE;
|
|
attr->res.flags = RESIDENT_FLAG_INDEXED;
|
|
attr->id = cpu_to_le16(aid++);
|
|
attr->res.data_size = cpu_to_le32(dsize);
|
|
memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), fname, dsize);
|
|
|
|
attr = Add2Ptr(attr, asize);
|
|
|
|
if (security_id == SECURITY_ID_INVALID) {
|
|
/* Insert security attribute. */
|
|
asize = SIZEOF_RESIDENT + ALIGN(sd_size, 8);
|
|
|
|
attr->type = ATTR_SECURE;
|
|
attr->size = cpu_to_le32(asize);
|
|
attr->id = cpu_to_le16(aid++);
|
|
attr->res.data_off = SIZEOF_RESIDENT_LE;
|
|
attr->res.data_size = cpu_to_le32(sd_size);
|
|
memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), sd, sd_size);
|
|
|
|
attr = Add2Ptr(attr, asize);
|
|
}
|
|
|
|
attr->id = cpu_to_le16(aid++);
|
|
if (fa & FILE_ATTRIBUTE_DIRECTORY) {
|
|
/*
|
|
* Regular directory or symlink to directory.
|
|
* Create root attribute.
|
|
*/
|
|
dsize = sizeof(struct INDEX_ROOT) + sizeof(struct NTFS_DE);
|
|
asize = sizeof(I30_NAME) + SIZEOF_RESIDENT + dsize;
|
|
|
|
attr->type = ATTR_ROOT;
|
|
attr->size = cpu_to_le32(asize);
|
|
|
|
attr->name_len = ARRAY_SIZE(I30_NAME);
|
|
attr->name_off = SIZEOF_RESIDENT_LE;
|
|
attr->res.data_off =
|
|
cpu_to_le16(sizeof(I30_NAME) + SIZEOF_RESIDENT);
|
|
attr->res.data_size = cpu_to_le32(dsize);
|
|
memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), I30_NAME,
|
|
sizeof(I30_NAME));
|
|
|
|
root = Add2Ptr(attr, sizeof(I30_NAME) + SIZEOF_RESIDENT);
|
|
memcpy(root, dir_root, offsetof(struct INDEX_ROOT, ihdr));
|
|
root->ihdr.de_off =
|
|
cpu_to_le32(sizeof(struct INDEX_HDR)); // 0x10
|
|
root->ihdr.used = cpu_to_le32(sizeof(struct INDEX_HDR) +
|
|
sizeof(struct NTFS_DE));
|
|
root->ihdr.total = root->ihdr.used;
|
|
|
|
e = Add2Ptr(root, sizeof(struct INDEX_ROOT));
|
|
e->size = cpu_to_le16(sizeof(struct NTFS_DE));
|
|
e->flags = NTFS_IE_LAST;
|
|
} else if (S_ISLNK(mode)) {
|
|
/*
|
|
* Symlink to file.
|
|
* Create empty resident data attribute.
|
|
*/
|
|
asize = SIZEOF_RESIDENT;
|
|
|
|
/* Insert empty ATTR_DATA */
|
|
attr->type = ATTR_DATA;
|
|
attr->size = cpu_to_le32(SIZEOF_RESIDENT);
|
|
attr->name_off = SIZEOF_RESIDENT_LE;
|
|
attr->res.data_off = SIZEOF_RESIDENT_LE;
|
|
} else if (S_ISREG(mode)) {
|
|
/*
|
|
* Regular file. Create empty non resident data attribute.
|
|
*/
|
|
attr->type = ATTR_DATA;
|
|
attr->non_res = 1;
|
|
attr->nres.evcn = cpu_to_le64(-1ll);
|
|
if (fa & FILE_ATTRIBUTE_SPARSE_FILE) {
|
|
attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8);
|
|
attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
|
|
attr->flags = ATTR_FLAG_SPARSED;
|
|
asize = SIZEOF_NONRESIDENT_EX + 8;
|
|
} else if (fa & FILE_ATTRIBUTE_COMPRESSED) {
|
|
attr->size = cpu_to_le32(SIZEOF_NONRESIDENT_EX + 8);
|
|
attr->name_off = SIZEOF_NONRESIDENT_EX_LE;
|
|
attr->flags = ATTR_FLAG_COMPRESSED;
|
|
attr->nres.c_unit = COMPRESSION_UNIT;
|
|
asize = SIZEOF_NONRESIDENT_EX + 8;
|
|
} else {
|
|
attr->size = cpu_to_le32(SIZEOF_NONRESIDENT + 8);
|
|
attr->name_off = SIZEOF_NONRESIDENT_LE;
|
|
asize = SIZEOF_NONRESIDENT + 8;
|
|
}
|
|
attr->nres.run_off = attr->name_off;
|
|
} else {
|
|
/*
|
|
* Node. Create empty resident data attribute.
|
|
*/
|
|
attr->type = ATTR_DATA;
|
|
attr->size = cpu_to_le32(SIZEOF_RESIDENT);
|
|
attr->name_off = SIZEOF_RESIDENT_LE;
|
|
if (fa & FILE_ATTRIBUTE_SPARSE_FILE)
|
|
attr->flags = ATTR_FLAG_SPARSED;
|
|
else if (fa & FILE_ATTRIBUTE_COMPRESSED)
|
|
attr->flags = ATTR_FLAG_COMPRESSED;
|
|
attr->res.data_off = SIZEOF_RESIDENT_LE;
|
|
asize = SIZEOF_RESIDENT;
|
|
ni->ni_flags |= NI_FLAG_RESIDENT;
|
|
}
|
|
|
|
if (S_ISDIR(mode)) {
|
|
ni->ni_flags |= NI_FLAG_DIR;
|
|
err = indx_init(&ni->dir, sbi, attr, INDEX_MUTEX_I30);
|
|
if (err)
|
|
goto out4;
|
|
} else if (S_ISLNK(mode)) {
|
|
rp = ntfs_create_reparse_buffer(sbi, symname, size, &nsize);
|
|
|
|
if (IS_ERR(rp)) {
|
|
err = PTR_ERR(rp);
|
|
rp = NULL;
|
|
goto out4;
|
|
}
|
|
|
|
/*
|
|
* Insert ATTR_REPARSE.
|
|
*/
|
|
attr = Add2Ptr(attr, asize);
|
|
attr->type = ATTR_REPARSE;
|
|
attr->id = cpu_to_le16(aid++);
|
|
|
|
/* Resident or non resident? */
|
|
asize = ALIGN(SIZEOF_RESIDENT + nsize, 8);
|
|
t16 = PtrOffset(rec, attr);
|
|
|
|
/*
|
|
* Below function 'ntfs_save_wsl_perm' requires 0x78 bytes.
|
|
* It is good idea to keep extened attributes resident.
|
|
*/
|
|
if (asize + t16 + 0x78 + 8 > sbi->record_size) {
|
|
CLST alen;
|
|
CLST clst = bytes_to_cluster(sbi, nsize);
|
|
|
|
/* Bytes per runs. */
|
|
t16 = sbi->record_size - t16 - SIZEOF_NONRESIDENT;
|
|
|
|
attr->non_res = 1;
|
|
attr->nres.evcn = cpu_to_le64(clst - 1);
|
|
attr->name_off = SIZEOF_NONRESIDENT_LE;
|
|
attr->nres.run_off = attr->name_off;
|
|
attr->nres.data_size = cpu_to_le64(nsize);
|
|
attr->nres.valid_size = attr->nres.data_size;
|
|
attr->nres.alloc_size =
|
|
cpu_to_le64(ntfs_up_cluster(sbi, nsize));
|
|
|
|
err = attr_allocate_clusters(sbi, &ni->file.run, 0, 0,
|
|
clst, NULL, ALLOCATE_DEF,
|
|
&alen, 0, NULL, NULL);
|
|
if (err)
|
|
goto out5;
|
|
|
|
err = run_pack(&ni->file.run, 0, clst,
|
|
Add2Ptr(attr, SIZEOF_NONRESIDENT), t16,
|
|
&vcn);
|
|
if (err < 0)
|
|
goto out5;
|
|
|
|
if (vcn != clst) {
|
|
err = -EINVAL;
|
|
goto out5;
|
|
}
|
|
|
|
asize = SIZEOF_NONRESIDENT + ALIGN(err, 8);
|
|
} else {
|
|
attr->res.data_off = SIZEOF_RESIDENT_LE;
|
|
attr->res.data_size = cpu_to_le32(nsize);
|
|
memcpy(Add2Ptr(attr, SIZEOF_RESIDENT), rp, nsize);
|
|
nsize = 0;
|
|
}
|
|
/* Size of symlink equals the length of input string. */
|
|
inode->i_size = size;
|
|
|
|
attr->size = cpu_to_le32(asize);
|
|
|
|
err = ntfs_insert_reparse(sbi, IO_REPARSE_TAG_SYMLINK,
|
|
&new_de->ref);
|
|
if (err)
|
|
goto out5;
|
|
|
|
rp_inserted = true;
|
|
}
|
|
|
|
attr = Add2Ptr(attr, asize);
|
|
attr->type = ATTR_END;
|
|
|
|
rec->used = cpu_to_le32(PtrOffset(rec, attr) + 8);
|
|
rec->next_attr_id = cpu_to_le16(aid);
|
|
|
|
/* Step 2: Add new name in index. */
|
|
err = indx_insert_entry(&dir_ni->dir, dir_ni, new_de, sbi, fnd, 0);
|
|
if (err)
|
|
goto out6;
|
|
|
|
/* Unlock parent directory before ntfs_init_acl. */
|
|
if (!fnd)
|
|
ni_unlock(dir_ni);
|
|
|
|
inode->i_generation = le16_to_cpu(rec->seq);
|
|
|
|
dir->i_mtime = dir->i_ctime = inode->i_atime;
|
|
|
|
if (S_ISDIR(mode)) {
|
|
inode->i_op = &ntfs_dir_inode_operations;
|
|
inode->i_fop = &ntfs_dir_operations;
|
|
} else if (S_ISLNK(mode)) {
|
|
inode->i_op = &ntfs_link_inode_operations;
|
|
inode->i_fop = NULL;
|
|
inode->i_mapping->a_ops = &ntfs_aops;
|
|
inode->i_size = size;
|
|
inode_nohighmem(inode);
|
|
} else if (S_ISREG(mode)) {
|
|
inode->i_op = &ntfs_file_inode_operations;
|
|
inode->i_fop = &ntfs_file_operations;
|
|
inode->i_mapping->a_ops =
|
|
is_compressed(ni) ? &ntfs_aops_cmpr : &ntfs_aops;
|
|
init_rwsem(&ni->file.run_lock);
|
|
} else {
|
|
inode->i_op = &ntfs_special_inode_operations;
|
|
init_special_inode(inode, mode, dev);
|
|
}
|
|
|
|
#ifdef CONFIG_NTFS3_FS_POSIX_ACL
|
|
if (!S_ISLNK(mode) && (sb->s_flags & SB_POSIXACL)) {
|
|
err = ntfs_init_acl(mnt_userns, inode, dir);
|
|
if (err)
|
|
goto out7;
|
|
} else
|
|
#endif
|
|
{
|
|
inode->i_flags |= S_NOSEC;
|
|
}
|
|
|
|
/* Write non resident data. */
|
|
if (nsize) {
|
|
err = ntfs_sb_write_run(sbi, &ni->file.run, 0, rp, nsize, 0);
|
|
if (err)
|
|
goto out7;
|
|
}
|
|
|
|
/*
|
|
* Call 'd_instantiate' after inode->i_op is set
|
|
* but before finish_open.
|
|
*/
|
|
d_instantiate(dentry, inode);
|
|
|
|
ntfs_save_wsl_perm(inode);
|
|
mark_inode_dirty(dir);
|
|
mark_inode_dirty(inode);
|
|
|
|
/* Normal exit. */
|
|
goto out2;
|
|
|
|
out7:
|
|
|
|
/* Undo 'indx_insert_entry'. */
|
|
if (!fnd)
|
|
ni_lock_dir(dir_ni);
|
|
indx_delete_entry(&dir_ni->dir, dir_ni, new_de + 1,
|
|
le16_to_cpu(new_de->key_size), sbi);
|
|
/* ni_unlock(dir_ni); will be called later. */
|
|
out6:
|
|
if (rp_inserted)
|
|
ntfs_remove_reparse(sbi, IO_REPARSE_TAG_SYMLINK, &new_de->ref);
|
|
|
|
out5:
|
|
if (!S_ISDIR(mode))
|
|
run_deallocate(sbi, &ni->file.run, false);
|
|
|
|
out4:
|
|
clear_rec_inuse(rec);
|
|
clear_nlink(inode);
|
|
ni->mi.dirty = false;
|
|
discard_new_inode(inode);
|
|
out3:
|
|
ntfs_mark_rec_free(sbi, ino, false);
|
|
|
|
out2:
|
|
__putname(new_de);
|
|
kfree(rp);
|
|
|
|
out1:
|
|
if (err) {
|
|
if (!fnd)
|
|
ni_unlock(dir_ni);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
unlock_new_inode(inode);
|
|
|
|
return inode;
|
|
}
|
|
|
|
int ntfs_link_inode(struct inode *inode, struct dentry *dentry)
|
|
{
|
|
int err;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
struct ntfs_sb_info *sbi = inode->i_sb->s_fs_info;
|
|
struct NTFS_DE *de;
|
|
|
|
/* Allocate PATH_MAX bytes. */
|
|
de = __getname();
|
|
if (!de)
|
|
return -ENOMEM;
|
|
|
|
/* Mark rw ntfs as dirty. It will be cleared at umount. */
|
|
ntfs_set_state(sbi, NTFS_DIRTY_DIRTY);
|
|
|
|
/* Construct 'de'. */
|
|
err = fill_name_de(sbi, de, &dentry->d_name, NULL);
|
|
if (err)
|
|
goto out;
|
|
|
|
err = ni_add_name(ntfs_i(d_inode(dentry->d_parent)), ni, de);
|
|
out:
|
|
__putname(de);
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_unlink_inode
|
|
*
|
|
* inode_operations::unlink
|
|
* inode_operations::rmdir
|
|
*/
|
|
int ntfs_unlink_inode(struct inode *dir, const struct dentry *dentry)
|
|
{
|
|
int err;
|
|
struct ntfs_sb_info *sbi = dir->i_sb->s_fs_info;
|
|
struct inode *inode = d_inode(dentry);
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
struct ntfs_inode *dir_ni = ntfs_i(dir);
|
|
struct NTFS_DE *de, *de2 = NULL;
|
|
int undo_remove;
|
|
|
|
if (ntfs_is_meta_file(sbi, ni->mi.rno))
|
|
return -EINVAL;
|
|
|
|
/* Allocate PATH_MAX bytes. */
|
|
de = __getname();
|
|
if (!de)
|
|
return -ENOMEM;
|
|
|
|
ni_lock(ni);
|
|
|
|
if (S_ISDIR(inode->i_mode) && !dir_is_empty(inode)) {
|
|
err = -ENOTEMPTY;
|
|
goto out;
|
|
}
|
|
|
|
err = fill_name_de(sbi, de, &dentry->d_name, NULL);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
undo_remove = 0;
|
|
err = ni_remove_name(dir_ni, ni, de, &de2, &undo_remove);
|
|
|
|
if (!err) {
|
|
drop_nlink(inode);
|
|
dir->i_mtime = dir->i_ctime = current_time(dir);
|
|
mark_inode_dirty(dir);
|
|
inode->i_ctime = dir->i_ctime;
|
|
if (inode->i_nlink)
|
|
mark_inode_dirty(inode);
|
|
} else if (!ni_remove_name_undo(dir_ni, ni, de, de2, undo_remove)) {
|
|
_ntfs_bad_inode(inode);
|
|
} else {
|
|
if (ni_is_dirty(dir))
|
|
mark_inode_dirty(dir);
|
|
if (ni_is_dirty(inode))
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
out:
|
|
ni_unlock(ni);
|
|
__putname(de);
|
|
return err;
|
|
}
|
|
|
|
void ntfs_evict_inode(struct inode *inode)
|
|
{
|
|
truncate_inode_pages_final(&inode->i_data);
|
|
|
|
if (inode->i_nlink)
|
|
_ni_write_inode(inode, inode_needs_sync(inode));
|
|
|
|
invalidate_inode_buffers(inode);
|
|
clear_inode(inode);
|
|
|
|
ni_clear(ntfs_i(inode));
|
|
}
|
|
|
|
/*
|
|
* ntfs_translate_junction
|
|
*
|
|
* Translate a Windows junction target to the Linux equivalent.
|
|
* On junctions, targets are always absolute (they include the drive
|
|
* letter). We have no way of knowing if the target is for the current
|
|
* mounted device or not so we just assume it is.
|
|
*/
|
|
static int ntfs_translate_junction(const struct super_block *sb,
|
|
const struct dentry *link_de, char *target,
|
|
int target_len, int target_max)
|
|
{
|
|
int tl_len, err = target_len;
|
|
char *link_path_buffer = NULL, *link_path;
|
|
char *translated = NULL;
|
|
char *target_start;
|
|
int copy_len;
|
|
|
|
link_path_buffer = kmalloc(PATH_MAX, GFP_NOFS);
|
|
if (!link_path_buffer) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
/* Get link path, relative to mount point */
|
|
link_path = dentry_path_raw(link_de, link_path_buffer, PATH_MAX);
|
|
if (IS_ERR(link_path)) {
|
|
ntfs_err(sb, "Error getting link path");
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
translated = kmalloc(PATH_MAX, GFP_NOFS);
|
|
if (!translated) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
/* Make translated path a relative path to mount point */
|
|
strcpy(translated, "./");
|
|
++link_path; /* Skip leading / */
|
|
for (tl_len = sizeof("./") - 1; *link_path; ++link_path) {
|
|
if (*link_path == '/') {
|
|
if (PATH_MAX - tl_len < sizeof("../")) {
|
|
ntfs_err(sb,
|
|
"Link path %s has too many components",
|
|
link_path);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
strcpy(translated + tl_len, "../");
|
|
tl_len += sizeof("../") - 1;
|
|
}
|
|
}
|
|
|
|
/* Skip drive letter */
|
|
target_start = target;
|
|
while (*target_start && *target_start != ':')
|
|
++target_start;
|
|
|
|
if (!*target_start) {
|
|
ntfs_err(sb, "Link target (%s) missing drive separator",
|
|
target);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* Skip drive separator and leading /, if exists */
|
|
target_start += 1 + (target_start[1] == '/');
|
|
copy_len = target_len - (target_start - target);
|
|
|
|
if (PATH_MAX - tl_len <= copy_len) {
|
|
ntfs_err(sb, "Link target %s too large for buffer (%d <= %d)",
|
|
target_start, PATH_MAX - tl_len, copy_len);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
/* translated path has a trailing / and target_start does not */
|
|
strcpy(translated + tl_len, target_start);
|
|
tl_len += copy_len;
|
|
if (target_max <= tl_len) {
|
|
ntfs_err(sb, "Target path %s too large for buffer (%d <= %d)",
|
|
translated, target_max, tl_len);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
strcpy(target, translated);
|
|
err = tl_len;
|
|
|
|
out:
|
|
kfree(link_path_buffer);
|
|
kfree(translated);
|
|
return err;
|
|
}
|
|
|
|
static noinline int ntfs_readlink_hlp(const struct dentry *link_de,
|
|
struct inode *inode, char *buffer,
|
|
int buflen)
|
|
{
|
|
int i, err = -EINVAL;
|
|
struct ntfs_inode *ni = ntfs_i(inode);
|
|
struct super_block *sb = inode->i_sb;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
u64 size;
|
|
u16 ulen = 0;
|
|
void *to_free = NULL;
|
|
struct REPARSE_DATA_BUFFER *rp;
|
|
const __le16 *uname;
|
|
struct ATTRIB *attr;
|
|
|
|
/* Reparse data present. Try to parse it. */
|
|
static_assert(!offsetof(struct REPARSE_DATA_BUFFER, ReparseTag));
|
|
static_assert(sizeof(u32) == sizeof(rp->ReparseTag));
|
|
|
|
*buffer = 0;
|
|
|
|
attr = ni_find_attr(ni, NULL, NULL, ATTR_REPARSE, NULL, 0, NULL, NULL);
|
|
if (!attr)
|
|
goto out;
|
|
|
|
if (!attr->non_res) {
|
|
rp = resident_data_ex(attr, sizeof(struct REPARSE_DATA_BUFFER));
|
|
if (!rp)
|
|
goto out;
|
|
size = le32_to_cpu(attr->res.data_size);
|
|
} else {
|
|
size = le64_to_cpu(attr->nres.data_size);
|
|
rp = NULL;
|
|
}
|
|
|
|
if (size > sbi->reparse.max_size || size <= sizeof(u32))
|
|
goto out;
|
|
|
|
if (!rp) {
|
|
rp = kmalloc(size, GFP_NOFS);
|
|
if (!rp) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
to_free = rp;
|
|
/* Read into temporal buffer. */
|
|
err = ntfs_read_run_nb(sbi, &ni->file.run, 0, rp, size, NULL);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
|
|
/* Microsoft Tag. */
|
|
switch (rp->ReparseTag) {
|
|
case IO_REPARSE_TAG_MOUNT_POINT:
|
|
/* Mount points and junctions. */
|
|
/* Can we use 'Rp->MountPointReparseBuffer.PrintNameLength'? */
|
|
if (size <= offsetof(struct REPARSE_DATA_BUFFER,
|
|
MountPointReparseBuffer.PathBuffer))
|
|
goto out;
|
|
uname = Add2Ptr(rp,
|
|
offsetof(struct REPARSE_DATA_BUFFER,
|
|
MountPointReparseBuffer.PathBuffer) +
|
|
le16_to_cpu(rp->MountPointReparseBuffer
|
|
.PrintNameOffset));
|
|
ulen = le16_to_cpu(rp->MountPointReparseBuffer.PrintNameLength);
|
|
break;
|
|
|
|
case IO_REPARSE_TAG_SYMLINK:
|
|
/* FolderSymbolicLink */
|
|
/* Can we use 'Rp->SymbolicLinkReparseBuffer.PrintNameLength'? */
|
|
if (size <= offsetof(struct REPARSE_DATA_BUFFER,
|
|
SymbolicLinkReparseBuffer.PathBuffer))
|
|
goto out;
|
|
uname = Add2Ptr(
|
|
rp, offsetof(struct REPARSE_DATA_BUFFER,
|
|
SymbolicLinkReparseBuffer.PathBuffer) +
|
|
le16_to_cpu(rp->SymbolicLinkReparseBuffer
|
|
.PrintNameOffset));
|
|
ulen = le16_to_cpu(
|
|
rp->SymbolicLinkReparseBuffer.PrintNameLength);
|
|
break;
|
|
|
|
case IO_REPARSE_TAG_CLOUD:
|
|
case IO_REPARSE_TAG_CLOUD_1:
|
|
case IO_REPARSE_TAG_CLOUD_2:
|
|
case IO_REPARSE_TAG_CLOUD_3:
|
|
case IO_REPARSE_TAG_CLOUD_4:
|
|
case IO_REPARSE_TAG_CLOUD_5:
|
|
case IO_REPARSE_TAG_CLOUD_6:
|
|
case IO_REPARSE_TAG_CLOUD_7:
|
|
case IO_REPARSE_TAG_CLOUD_8:
|
|
case IO_REPARSE_TAG_CLOUD_9:
|
|
case IO_REPARSE_TAG_CLOUD_A:
|
|
case IO_REPARSE_TAG_CLOUD_B:
|
|
case IO_REPARSE_TAG_CLOUD_C:
|
|
case IO_REPARSE_TAG_CLOUD_D:
|
|
case IO_REPARSE_TAG_CLOUD_E:
|
|
case IO_REPARSE_TAG_CLOUD_F:
|
|
err = sizeof("OneDrive") - 1;
|
|
if (err > buflen)
|
|
err = buflen;
|
|
memcpy(buffer, "OneDrive", err);
|
|
goto out;
|
|
|
|
default:
|
|
if (IsReparseTagMicrosoft(rp->ReparseTag)) {
|
|
/* Unknown Microsoft Tag. */
|
|
goto out;
|
|
}
|
|
if (!IsReparseTagNameSurrogate(rp->ReparseTag) ||
|
|
size <= sizeof(struct REPARSE_POINT)) {
|
|
goto out;
|
|
}
|
|
|
|
/* Users tag. */
|
|
uname = Add2Ptr(rp, sizeof(struct REPARSE_POINT));
|
|
ulen = le16_to_cpu(rp->ReparseDataLength) -
|
|
sizeof(struct REPARSE_POINT);
|
|
}
|
|
|
|
/* Convert nlen from bytes to UNICODE chars. */
|
|
ulen >>= 1;
|
|
|
|
/* Check that name is available. */
|
|
if (!ulen || uname + ulen > (__le16 *)Add2Ptr(rp, size))
|
|
goto out;
|
|
|
|
/* If name is already zero terminated then truncate it now. */
|
|
if (!uname[ulen - 1])
|
|
ulen -= 1;
|
|
|
|
err = ntfs_utf16_to_nls(sbi, uname, ulen, buffer, buflen);
|
|
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
/* Translate Windows '\' into Linux '/'. */
|
|
for (i = 0; i < err; i++) {
|
|
if (buffer[i] == '\\')
|
|
buffer[i] = '/';
|
|
}
|
|
|
|
/* Always set last zero. */
|
|
buffer[err] = 0;
|
|
|
|
/* If this is a junction, translate the link target. */
|
|
if (rp->ReparseTag == IO_REPARSE_TAG_MOUNT_POINT)
|
|
err = ntfs_translate_junction(sb, link_de, buffer, err, buflen);
|
|
|
|
out:
|
|
kfree(to_free);
|
|
return err;
|
|
}
|
|
|
|
static const char *ntfs_get_link(struct dentry *de, struct inode *inode,
|
|
struct delayed_call *done)
|
|
{
|
|
int err;
|
|
char *ret;
|
|
|
|
if (!de)
|
|
return ERR_PTR(-ECHILD);
|
|
|
|
ret = kmalloc(PAGE_SIZE, GFP_NOFS);
|
|
if (!ret)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
err = ntfs_readlink_hlp(de, inode, ret, PAGE_SIZE);
|
|
if (err < 0) {
|
|
kfree(ret);
|
|
return ERR_PTR(err);
|
|
}
|
|
|
|
set_delayed_call(done, kfree_link, ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
// clang-format off
|
|
const struct inode_operations ntfs_link_inode_operations = {
|
|
.get_link = ntfs_get_link,
|
|
.setattr = ntfs3_setattr,
|
|
.listxattr = ntfs_listxattr,
|
|
.permission = ntfs_permission,
|
|
};
|
|
|
|
const struct address_space_operations ntfs_aops = {
|
|
.read_folio = ntfs_read_folio,
|
|
.readahead = ntfs_readahead,
|
|
.writepage = ntfs_writepage,
|
|
.writepages = ntfs_writepages,
|
|
.write_begin = ntfs_write_begin,
|
|
.write_end = ntfs_write_end,
|
|
.direct_IO = ntfs_direct_IO,
|
|
.bmap = ntfs_bmap,
|
|
.dirty_folio = block_dirty_folio,
|
|
.invalidate_folio = block_invalidate_folio,
|
|
};
|
|
|
|
const struct address_space_operations ntfs_aops_cmpr = {
|
|
.read_folio = ntfs_read_folio,
|
|
.readahead = ntfs_readahead,
|
|
};
|
|
// clang-format on
|