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![Konstantin Komarov](/assets/img/avatar_default.png)
Separate checking inode->i_op and inode itself. Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <error27@gmail.com> Link: https://lore.kernel.org/r/202302162319.bDJOuyfy-lkp@intel.com/ Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
1613 lines
39 KiB
C
1613 lines
39 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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* terminology
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*
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* cluster - allocation unit - 512,1K,2K,4K,...,2M
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* vcn - virtual cluster number - Offset inside the file in clusters.
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* vbo - virtual byte offset - Offset inside the file in bytes.
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* lcn - logical cluster number - 0 based cluster in clusters heap.
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* lbo - logical byte offset - Absolute position inside volume.
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* run - maps VCN to LCN - Stored in attributes in packed form.
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* attr - attribute segment - std/name/data etc records inside MFT.
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* mi - MFT inode - One MFT record(usually 1024 bytes or 4K), consists of attributes.
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* ni - NTFS inode - Extends linux inode. consists of one or more mft inodes.
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* index - unit inside directory - 2K, 4K, <=page size, does not depend on cluster size.
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*
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* WSL - Windows Subsystem for Linux
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* https://docs.microsoft.com/en-us/windows/wsl/file-permissions
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* It stores uid/gid/mode/dev in xattr
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*
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* ntfs allows up to 2^64 clusters per volume.
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* It means you should use 64 bits lcn to operate with ntfs.
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* Implementation of ntfs.sys uses only 32 bits lcn.
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* Default ntfs3 uses 32 bits lcn too.
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* ntfs3 built with CONFIG_NTFS3_64BIT_CLUSTER (ntfs3_64) uses 64 bits per lcn.
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*
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*
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* ntfs limits, cluster size is 4K (2^12)
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* -----------------------------------------------------------------------------
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* | Volume size | Clusters | ntfs.sys | ntfs3 | ntfs3_64 | mkntfs | chkdsk |
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* -----------------------------------------------------------------------------
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* | < 16T, 2^44 | < 2^32 | yes | yes | yes | yes | yes |
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* | > 16T, 2^44 | > 2^32 | no | no | yes | yes | yes |
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* ----------------------------------------------------------|------------------
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*
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* To mount large volumes as ntfs one should use large cluster size (up to 2M)
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* The maximum volume size in this case is 2^32 * 2^21 = 2^53 = 8P
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*
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* ntfs limits, cluster size is 2M (2^21)
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* -----------------------------------------------------------------------------
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* | < 8P, 2^53 | < 2^32 | yes | yes | yes | yes | yes |
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* | > 8P, 2^53 | > 2^32 | no | no | yes | yes | yes |
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* ----------------------------------------------------------|------------------
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*
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*/
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#include <linux/blkdev.h>
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#include <linux/buffer_head.h>
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#include <linux/exportfs.h>
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#include <linux/fs.h>
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#include <linux/fs_context.h>
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#include <linux/fs_parser.h>
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#include <linux/log2.h>
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#include <linux/minmax.h>
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#include <linux/module.h>
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#include <linux/nls.h>
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#include <linux/seq_file.h>
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#include <linux/statfs.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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#ifdef CONFIG_NTFS3_LZX_XPRESS
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#include "lib/lib.h"
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#endif
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#ifdef CONFIG_PRINTK
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/*
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* ntfs_printk - Trace warnings/notices/errors.
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*
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* Thanks Joe Perches <joe@perches.com> for implementation
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*/
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void ntfs_printk(const struct super_block *sb, const char *fmt, ...)
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{
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struct va_format vaf;
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va_list args;
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int level;
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struct ntfs_sb_info *sbi = sb->s_fs_info;
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/* Should we use different ratelimits for warnings/notices/errors? */
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if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
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return;
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va_start(args, fmt);
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level = printk_get_level(fmt);
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vaf.fmt = printk_skip_level(fmt);
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vaf.va = &args;
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printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf);
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va_end(args);
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}
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static char s_name_buf[512];
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static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'.
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/*
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* ntfs_inode_printk
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*
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* Print warnings/notices/errors about inode using name or inode number.
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*/
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void ntfs_inode_printk(struct inode *inode, const char *fmt, ...)
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{
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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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char *name;
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va_list args;
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struct va_format vaf;
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int level;
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if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
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return;
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/* Use static allocated buffer, if possible. */
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name = atomic_dec_and_test(&s_name_buf_cnt) ?
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s_name_buf :
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kmalloc(sizeof(s_name_buf), GFP_NOFS);
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if (name) {
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struct dentry *de = d_find_alias(inode);
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const u32 name_len = ARRAY_SIZE(s_name_buf) - 1;
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if (de) {
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spin_lock(&de->d_lock);
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snprintf(name, name_len, " \"%s\"", de->d_name.name);
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spin_unlock(&de->d_lock);
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name[name_len] = 0; /* To be sure. */
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} else {
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name[0] = 0;
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}
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dput(de); /* Cocci warns if placed in branch "if (de)" */
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}
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va_start(args, fmt);
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level = printk_get_level(fmt);
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vaf.fmt = printk_skip_level(fmt);
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vaf.va = &args;
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printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level,
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sb->s_id, inode->i_ino, name ? name : "", &vaf);
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va_end(args);
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atomic_inc(&s_name_buf_cnt);
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if (name != s_name_buf)
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kfree(name);
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}
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#endif
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/*
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* Shared memory struct.
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*
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* On-disk ntfs's upcase table is created by ntfs formatter.
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* 'upcase' table is 128K bytes of memory.
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* We should read it into memory when mounting.
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* Several ntfs volumes likely use the same 'upcase' table.
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* It is good idea to share in-memory 'upcase' table between different volumes.
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* Unfortunately winxp/vista/win7 use different upcase tables.
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*/
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static DEFINE_SPINLOCK(s_shared_lock);
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static struct {
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void *ptr;
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u32 len;
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int cnt;
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} s_shared[8];
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/*
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* ntfs_set_shared
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*
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* Return:
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* * @ptr - If pointer was saved in shared memory.
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* * NULL - If pointer was not shared.
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*/
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void *ntfs_set_shared(void *ptr, u32 bytes)
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{
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void *ret = NULL;
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int i, j = -1;
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spin_lock(&s_shared_lock);
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for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
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if (!s_shared[i].cnt) {
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j = i;
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} else if (bytes == s_shared[i].len &&
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!memcmp(s_shared[i].ptr, ptr, bytes)) {
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s_shared[i].cnt += 1;
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ret = s_shared[i].ptr;
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break;
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}
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}
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if (!ret && j != -1) {
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s_shared[j].ptr = ptr;
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s_shared[j].len = bytes;
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s_shared[j].cnt = 1;
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ret = ptr;
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}
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spin_unlock(&s_shared_lock);
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return ret;
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}
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/*
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* ntfs_put_shared
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*
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* Return:
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* * @ptr - If pointer is not shared anymore.
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* * NULL - If pointer is still shared.
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*/
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void *ntfs_put_shared(void *ptr)
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{
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void *ret = ptr;
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int i;
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spin_lock(&s_shared_lock);
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for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
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if (s_shared[i].cnt && s_shared[i].ptr == ptr) {
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if (--s_shared[i].cnt)
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ret = NULL;
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break;
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}
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}
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spin_unlock(&s_shared_lock);
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return ret;
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}
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static inline void put_mount_options(struct ntfs_mount_options *options)
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{
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kfree(options->nls_name);
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unload_nls(options->nls);
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kfree(options);
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}
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enum Opt {
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Opt_uid,
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Opt_gid,
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Opt_umask,
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Opt_dmask,
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Opt_fmask,
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Opt_immutable,
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Opt_discard,
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Opt_force,
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Opt_sparse,
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Opt_nohidden,
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Opt_hide_dot_files,
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Opt_windows_names,
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Opt_showmeta,
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Opt_acl,
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Opt_iocharset,
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Opt_prealloc,
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Opt_nocase,
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Opt_err,
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};
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static const struct fs_parameter_spec ntfs_fs_parameters[] = {
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fsparam_u32("uid", Opt_uid),
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fsparam_u32("gid", Opt_gid),
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fsparam_u32oct("umask", Opt_umask),
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fsparam_u32oct("dmask", Opt_dmask),
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fsparam_u32oct("fmask", Opt_fmask),
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fsparam_flag_no("sys_immutable", Opt_immutable),
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fsparam_flag_no("discard", Opt_discard),
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fsparam_flag_no("force", Opt_force),
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fsparam_flag_no("sparse", Opt_sparse),
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fsparam_flag_no("hidden", Opt_nohidden),
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fsparam_flag_no("hide_dot_files", Opt_hide_dot_files),
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fsparam_flag_no("windows_names", Opt_windows_names),
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fsparam_flag_no("showmeta", Opt_showmeta),
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fsparam_flag_no("acl", Opt_acl),
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fsparam_string("iocharset", Opt_iocharset),
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fsparam_flag_no("prealloc", Opt_prealloc),
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fsparam_flag_no("nocase", Opt_nocase),
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{}
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};
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/*
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* Load nls table or if @nls is utf8 then return NULL.
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*/
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static struct nls_table *ntfs_load_nls(char *nls)
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{
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struct nls_table *ret;
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if (!nls)
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nls = CONFIG_NLS_DEFAULT;
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if (strcmp(nls, "utf8") == 0)
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return NULL;
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if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0)
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return load_nls_default();
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ret = load_nls(nls);
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if (ret)
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return ret;
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return ERR_PTR(-EINVAL);
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}
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static int ntfs_fs_parse_param(struct fs_context *fc,
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struct fs_parameter *param)
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{
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struct ntfs_mount_options *opts = fc->fs_private;
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struct fs_parse_result result;
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int opt;
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opt = fs_parse(fc, ntfs_fs_parameters, param, &result);
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if (opt < 0)
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return opt;
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switch (opt) {
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case Opt_uid:
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opts->fs_uid = make_kuid(current_user_ns(), result.uint_32);
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if (!uid_valid(opts->fs_uid))
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return invalf(fc, "ntfs3: Invalid value for uid.");
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break;
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case Opt_gid:
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opts->fs_gid = make_kgid(current_user_ns(), result.uint_32);
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if (!gid_valid(opts->fs_gid))
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return invalf(fc, "ntfs3: Invalid value for gid.");
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break;
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case Opt_umask:
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if (result.uint_32 & ~07777)
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return invalf(fc, "ntfs3: Invalid value for umask.");
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opts->fs_fmask_inv = ~result.uint_32;
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opts->fs_dmask_inv = ~result.uint_32;
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opts->fmask = 1;
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opts->dmask = 1;
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break;
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case Opt_dmask:
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if (result.uint_32 & ~07777)
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return invalf(fc, "ntfs3: Invalid value for dmask.");
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opts->fs_dmask_inv = ~result.uint_32;
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opts->dmask = 1;
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break;
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case Opt_fmask:
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if (result.uint_32 & ~07777)
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return invalf(fc, "ntfs3: Invalid value for fmask.");
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opts->fs_fmask_inv = ~result.uint_32;
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opts->fmask = 1;
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break;
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case Opt_immutable:
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opts->sys_immutable = result.negated ? 0 : 1;
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break;
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case Opt_discard:
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opts->discard = result.negated ? 0 : 1;
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break;
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case Opt_force:
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opts->force = result.negated ? 0 : 1;
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break;
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case Opt_sparse:
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opts->sparse = result.negated ? 0 : 1;
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break;
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case Opt_nohidden:
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opts->nohidden = result.negated ? 1 : 0;
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break;
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case Opt_hide_dot_files:
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opts->hide_dot_files = result.negated ? 0 : 1;
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break;
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case Opt_windows_names:
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opts->windows_names = result.negated ? 0 : 1;
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break;
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case Opt_showmeta:
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opts->showmeta = result.negated ? 0 : 1;
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break;
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case Opt_acl:
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if (!result.negated)
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#ifdef CONFIG_NTFS3_FS_POSIX_ACL
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fc->sb_flags |= SB_POSIXACL;
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#else
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return invalf(
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fc, "ntfs3: Support for ACL not compiled in!");
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#endif
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else
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fc->sb_flags &= ~SB_POSIXACL;
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break;
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case Opt_iocharset:
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kfree(opts->nls_name);
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opts->nls_name = param->string;
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param->string = NULL;
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break;
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case Opt_prealloc:
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opts->prealloc = result.negated ? 0 : 1;
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break;
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case Opt_nocase:
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opts->nocase = result.negated ? 1 : 0;
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break;
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default:
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/* Should not be here unless we forget add case. */
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return -EINVAL;
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}
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return 0;
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}
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static int ntfs_fs_reconfigure(struct fs_context *fc)
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{
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struct super_block *sb = fc->root->d_sb;
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struct ntfs_sb_info *sbi = sb->s_fs_info;
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struct ntfs_mount_options *new_opts = fc->fs_private;
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int ro_rw;
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ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY);
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if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) {
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errorf(fc,
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"ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n");
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return -EINVAL;
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}
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new_opts->nls = ntfs_load_nls(new_opts->nls_name);
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if (IS_ERR(new_opts->nls)) {
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new_opts->nls = NULL;
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errorf(fc, "ntfs3: Cannot load iocharset %s",
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new_opts->nls_name);
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return -EINVAL;
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}
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if (new_opts->nls != sbi->options->nls)
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return invalf(
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fc,
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"ntfs3: Cannot use different iocharset when remounting!");
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sync_filesystem(sb);
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if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) &&
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!new_opts->force) {
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errorf(fc,
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"ntfs3: Volume is dirty and \"force\" flag is not set!");
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return -EINVAL;
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}
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swap(sbi->options, fc->fs_private);
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return 0;
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}
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static struct kmem_cache *ntfs_inode_cachep;
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static struct inode *ntfs_alloc_inode(struct super_block *sb)
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{
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struct ntfs_inode *ni = alloc_inode_sb(sb, ntfs_inode_cachep, GFP_NOFS);
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if (!ni)
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return NULL;
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memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode));
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mutex_init(&ni->ni_lock);
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return &ni->vfs_inode;
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}
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static void ntfs_free_inode(struct inode *inode)
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{
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struct ntfs_inode *ni = ntfs_i(inode);
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mutex_destroy(&ni->ni_lock);
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kmem_cache_free(ntfs_inode_cachep, ni);
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}
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static void init_once(void *foo)
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{
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struct ntfs_inode *ni = foo;
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inode_init_once(&ni->vfs_inode);
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}
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|
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/*
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* put_ntfs - Noinline to reduce binary size.
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*/
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static noinline void put_ntfs(struct ntfs_sb_info *sbi)
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{
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kfree(sbi->new_rec);
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kvfree(ntfs_put_shared(sbi->upcase));
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kfree(sbi->def_table);
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wnd_close(&sbi->mft.bitmap);
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wnd_close(&sbi->used.bitmap);
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if (sbi->mft.ni)
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iput(&sbi->mft.ni->vfs_inode);
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if (sbi->security.ni)
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iput(&sbi->security.ni->vfs_inode);
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if (sbi->reparse.ni)
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iput(&sbi->reparse.ni->vfs_inode);
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if (sbi->objid.ni)
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iput(&sbi->objid.ni->vfs_inode);
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if (sbi->volume.ni)
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iput(&sbi->volume.ni->vfs_inode);
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ntfs_update_mftmirr(sbi, 0);
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indx_clear(&sbi->security.index_sii);
|
|
indx_clear(&sbi->security.index_sdh);
|
|
indx_clear(&sbi->reparse.index_r);
|
|
indx_clear(&sbi->objid.index_o);
|
|
kfree(sbi->compress.lznt);
|
|
#ifdef CONFIG_NTFS3_LZX_XPRESS
|
|
xpress_free_decompressor(sbi->compress.xpress);
|
|
lzx_free_decompressor(sbi->compress.lzx);
|
|
#endif
|
|
kfree(sbi);
|
|
}
|
|
|
|
static void ntfs_put_super(struct super_block *sb)
|
|
{
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
|
|
/* Mark rw ntfs as clear, if possible. */
|
|
ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
|
|
|
|
put_mount_options(sbi->options);
|
|
put_ntfs(sbi);
|
|
sb->s_fs_info = NULL;
|
|
|
|
sync_blockdev(sb->s_bdev);
|
|
}
|
|
|
|
static int ntfs_statfs(struct dentry *dentry, struct kstatfs *buf)
|
|
{
|
|
struct super_block *sb = dentry->d_sb;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
struct wnd_bitmap *wnd = &sbi->used.bitmap;
|
|
|
|
buf->f_type = sb->s_magic;
|
|
buf->f_bsize = sbi->cluster_size;
|
|
buf->f_blocks = wnd->nbits;
|
|
|
|
buf->f_bfree = buf->f_bavail = wnd_zeroes(wnd);
|
|
buf->f_fsid.val[0] = sbi->volume.ser_num;
|
|
buf->f_fsid.val[1] = (sbi->volume.ser_num >> 32);
|
|
buf->f_namelen = NTFS_NAME_LEN;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ntfs_show_options(struct seq_file *m, struct dentry *root)
|
|
{
|
|
struct super_block *sb = root->d_sb;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
struct ntfs_mount_options *opts = sbi->options;
|
|
struct user_namespace *user_ns = seq_user_ns(m);
|
|
|
|
seq_printf(m, ",uid=%u", from_kuid_munged(user_ns, opts->fs_uid));
|
|
seq_printf(m, ",gid=%u", from_kgid_munged(user_ns, opts->fs_gid));
|
|
if (opts->dmask)
|
|
seq_printf(m, ",dmask=%04o", opts->fs_dmask_inv ^ 0xffff);
|
|
if (opts->fmask)
|
|
seq_printf(m, ",fmask=%04o", opts->fs_fmask_inv ^ 0xffff);
|
|
if (opts->sys_immutable)
|
|
seq_puts(m, ",sys_immutable");
|
|
if (opts->discard)
|
|
seq_puts(m, ",discard");
|
|
if (opts->force)
|
|
seq_puts(m, ",force");
|
|
if (opts->sparse)
|
|
seq_puts(m, ",sparse");
|
|
if (opts->nohidden)
|
|
seq_puts(m, ",nohidden");
|
|
if (opts->hide_dot_files)
|
|
seq_puts(m, ",hide_dot_files");
|
|
if (opts->windows_names)
|
|
seq_puts(m, ",windows_names");
|
|
if (opts->showmeta)
|
|
seq_puts(m, ",showmeta");
|
|
if (sb->s_flags & SB_POSIXACL)
|
|
seq_puts(m, ",acl");
|
|
if (opts->nls)
|
|
seq_printf(m, ",iocharset=%s", opts->nls->charset);
|
|
else
|
|
seq_puts(m, ",iocharset=utf8");
|
|
if (opts->prealloc)
|
|
seq_puts(m, ",prealloc");
|
|
if (opts->nocase)
|
|
seq_puts(m, ",nocase");
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* ntfs_sync_fs - super_operations::sync_fs
|
|
*/
|
|
static int ntfs_sync_fs(struct super_block *sb, int wait)
|
|
{
|
|
int err = 0, err2;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
struct ntfs_inode *ni;
|
|
struct inode *inode;
|
|
|
|
ni = sbi->security.ni;
|
|
if (ni) {
|
|
inode = &ni->vfs_inode;
|
|
err2 = _ni_write_inode(inode, wait);
|
|
if (err2 && !err)
|
|
err = err2;
|
|
}
|
|
|
|
ni = sbi->objid.ni;
|
|
if (ni) {
|
|
inode = &ni->vfs_inode;
|
|
err2 = _ni_write_inode(inode, wait);
|
|
if (err2 && !err)
|
|
err = err2;
|
|
}
|
|
|
|
ni = sbi->reparse.ni;
|
|
if (ni) {
|
|
inode = &ni->vfs_inode;
|
|
err2 = _ni_write_inode(inode, wait);
|
|
if (err2 && !err)
|
|
err = err2;
|
|
}
|
|
|
|
if (!err)
|
|
ntfs_set_state(sbi, NTFS_DIRTY_CLEAR);
|
|
|
|
ntfs_update_mftmirr(sbi, wait);
|
|
|
|
return err;
|
|
}
|
|
|
|
static const struct super_operations ntfs_sops = {
|
|
.alloc_inode = ntfs_alloc_inode,
|
|
.free_inode = ntfs_free_inode,
|
|
.evict_inode = ntfs_evict_inode,
|
|
.put_super = ntfs_put_super,
|
|
.statfs = ntfs_statfs,
|
|
.show_options = ntfs_show_options,
|
|
.sync_fs = ntfs_sync_fs,
|
|
.write_inode = ntfs3_write_inode,
|
|
};
|
|
|
|
static struct inode *ntfs_export_get_inode(struct super_block *sb, u64 ino,
|
|
u32 generation)
|
|
{
|
|
struct MFT_REF ref;
|
|
struct inode *inode;
|
|
|
|
ref.low = cpu_to_le32(ino);
|
|
#ifdef CONFIG_NTFS3_64BIT_CLUSTER
|
|
ref.high = cpu_to_le16(ino >> 32);
|
|
#else
|
|
ref.high = 0;
|
|
#endif
|
|
ref.seq = cpu_to_le16(generation);
|
|
|
|
inode = ntfs_iget5(sb, &ref, NULL);
|
|
if (!IS_ERR(inode) && is_bad_inode(inode)) {
|
|
iput(inode);
|
|
inode = ERR_PTR(-ESTALE);
|
|
}
|
|
|
|
return inode;
|
|
}
|
|
|
|
static struct dentry *ntfs_fh_to_dentry(struct super_block *sb, struct fid *fid,
|
|
int fh_len, int fh_type)
|
|
{
|
|
return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
|
|
ntfs_export_get_inode);
|
|
}
|
|
|
|
static struct dentry *ntfs_fh_to_parent(struct super_block *sb, struct fid *fid,
|
|
int fh_len, int fh_type)
|
|
{
|
|
return generic_fh_to_parent(sb, fid, fh_len, fh_type,
|
|
ntfs_export_get_inode);
|
|
}
|
|
|
|
/* TODO: == ntfs_sync_inode */
|
|
static int ntfs_nfs_commit_metadata(struct inode *inode)
|
|
{
|
|
return _ni_write_inode(inode, 1);
|
|
}
|
|
|
|
static const struct export_operations ntfs_export_ops = {
|
|
.fh_to_dentry = ntfs_fh_to_dentry,
|
|
.fh_to_parent = ntfs_fh_to_parent,
|
|
.get_parent = ntfs3_get_parent,
|
|
.commit_metadata = ntfs_nfs_commit_metadata,
|
|
};
|
|
|
|
/*
|
|
* format_size_gb - Return Gb,Mb to print with "%u.%02u Gb".
|
|
*/
|
|
static u32 format_size_gb(const u64 bytes, u32 *mb)
|
|
{
|
|
/* Do simple right 30 bit shift of 64 bit value. */
|
|
u64 kbytes = bytes >> 10;
|
|
u32 kbytes32 = kbytes;
|
|
|
|
*mb = (100 * (kbytes32 & 0xfffff) + 0x7ffff) >> 20;
|
|
if (*mb >= 100)
|
|
*mb = 99;
|
|
|
|
return (kbytes32 >> 20) | (((u32)(kbytes >> 32)) << 12);
|
|
}
|
|
|
|
static u32 true_sectors_per_clst(const struct NTFS_BOOT *boot)
|
|
{
|
|
if (boot->sectors_per_clusters <= 0x80)
|
|
return boot->sectors_per_clusters;
|
|
if (boot->sectors_per_clusters >= 0xf4) /* limit shift to 2MB max */
|
|
return 1U << (-(s8)boot->sectors_per_clusters);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* ntfs_init_from_boot - Init internal info from on-disk boot sector.
|
|
*/
|
|
static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size,
|
|
u64 dev_size)
|
|
{
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
int err;
|
|
u32 mb, gb, boot_sector_size, sct_per_clst, record_size;
|
|
u64 sectors, clusters, mlcn, mlcn2;
|
|
struct NTFS_BOOT *boot;
|
|
struct buffer_head *bh;
|
|
struct MFT_REC *rec;
|
|
u16 fn, ao;
|
|
u8 cluster_bits;
|
|
|
|
sbi->volume.blocks = dev_size >> PAGE_SHIFT;
|
|
|
|
bh = ntfs_bread(sb, 0);
|
|
if (!bh)
|
|
return -EIO;
|
|
|
|
err = -EINVAL;
|
|
boot = (struct NTFS_BOOT *)bh->b_data;
|
|
|
|
if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) {
|
|
ntfs_err(sb, "Boot's signature is not NTFS.");
|
|
goto out;
|
|
}
|
|
|
|
/* 0x55AA is not mandaroty. Thanks Maxim Suhanov*/
|
|
/*if (0x55 != boot->boot_magic[0] || 0xAA != boot->boot_magic[1])
|
|
* goto out;
|
|
*/
|
|
|
|
boot_sector_size = ((u32)boot->bytes_per_sector[1] << 8) |
|
|
boot->bytes_per_sector[0];
|
|
if (boot_sector_size < SECTOR_SIZE ||
|
|
!is_power_of_2(boot_sector_size)) {
|
|
ntfs_err(sb, "Invalid bytes per sector %u.", boot_sector_size);
|
|
goto out;
|
|
}
|
|
|
|
/* cluster size: 512, 1K, 2K, 4K, ... 2M */
|
|
sct_per_clst = true_sectors_per_clst(boot);
|
|
if ((int)sct_per_clst < 0 || !is_power_of_2(sct_per_clst)) {
|
|
ntfs_err(sb, "Invalid sectors per cluster %u.", sct_per_clst);
|
|
goto out;
|
|
}
|
|
|
|
sbi->cluster_size = boot_sector_size * sct_per_clst;
|
|
sbi->cluster_bits = cluster_bits = blksize_bits(sbi->cluster_size);
|
|
sbi->cluster_mask = sbi->cluster_size - 1;
|
|
sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask;
|
|
|
|
mlcn = le64_to_cpu(boot->mft_clst);
|
|
mlcn2 = le64_to_cpu(boot->mft2_clst);
|
|
sectors = le64_to_cpu(boot->sectors_per_volume);
|
|
|
|
if (mlcn * sct_per_clst >= sectors || mlcn2 * sct_per_clst >= sectors) {
|
|
ntfs_err(
|
|
sb,
|
|
"Start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.",
|
|
mlcn, mlcn2, sectors);
|
|
goto out;
|
|
}
|
|
|
|
sbi->record_size = record_size =
|
|
boot->record_size < 0 ? 1 << (-boot->record_size) :
|
|
(u32)boot->record_size << cluster_bits;
|
|
sbi->record_bits = blksize_bits(record_size);
|
|
sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes
|
|
|
|
/* Check MFT record size. */
|
|
if (record_size < SECTOR_SIZE || !is_power_of_2(record_size)) {
|
|
ntfs_err(sb, "Invalid bytes per MFT record %u (%d).",
|
|
record_size, boot->record_size);
|
|
goto out;
|
|
}
|
|
|
|
if (record_size > MAXIMUM_BYTES_PER_MFT) {
|
|
ntfs_err(sb, "Unsupported bytes per MFT record %u.",
|
|
record_size);
|
|
goto out;
|
|
}
|
|
|
|
sbi->index_size = boot->index_size < 0 ?
|
|
1u << (-boot->index_size) :
|
|
(u32)boot->index_size << cluster_bits;
|
|
|
|
/* Check index record size. */
|
|
if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) {
|
|
ntfs_err(sb, "Invalid bytes per index %u(%d).", sbi->index_size,
|
|
boot->index_size);
|
|
goto out;
|
|
}
|
|
|
|
if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) {
|
|
ntfs_err(sb, "Unsupported bytes per index %u.",
|
|
sbi->index_size);
|
|
goto out;
|
|
}
|
|
|
|
sbi->volume.size = sectors * boot_sector_size;
|
|
|
|
gb = format_size_gb(sbi->volume.size + boot_sector_size, &mb);
|
|
|
|
/*
|
|
* - Volume formatted and mounted with the same sector size.
|
|
* - Volume formatted 4K and mounted as 512.
|
|
* - Volume formatted 512 and mounted as 4K.
|
|
*/
|
|
if (boot_sector_size != sector_size) {
|
|
ntfs_warn(
|
|
sb,
|
|
"Different NTFS sector size (%u) and media sector size (%u).",
|
|
boot_sector_size, sector_size);
|
|
dev_size += sector_size - 1;
|
|
}
|
|
|
|
sbi->mft.lbo = mlcn << cluster_bits;
|
|
sbi->mft.lbo2 = mlcn2 << cluster_bits;
|
|
|
|
/* Compare boot's cluster and sector. */
|
|
if (sbi->cluster_size < boot_sector_size) {
|
|
ntfs_err(sb, "Invalid bytes per cluster (%u).",
|
|
sbi->cluster_size);
|
|
goto out;
|
|
}
|
|
|
|
/* Compare boot's cluster and media sector. */
|
|
if (sbi->cluster_size < sector_size) {
|
|
/* No way to use ntfs_get_block in this case. */
|
|
ntfs_err(
|
|
sb,
|
|
"Failed to mount 'cause NTFS's cluster size (%u) is less than media sector size (%u).",
|
|
sbi->cluster_size, sector_size);
|
|
goto out;
|
|
}
|
|
|
|
sbi->max_bytes_per_attr =
|
|
record_size - ALIGN(MFTRECORD_FIXUP_OFFSET_1, 8) -
|
|
ALIGN(((record_size >> SECTOR_SHIFT) * sizeof(short)), 8) -
|
|
ALIGN(sizeof(enum ATTR_TYPE), 8);
|
|
|
|
sbi->volume.ser_num = le64_to_cpu(boot->serial_num);
|
|
|
|
/* Warning if RAW volume. */
|
|
if (dev_size < sbi->volume.size + boot_sector_size) {
|
|
u32 mb0, gb0;
|
|
|
|
gb0 = format_size_gb(dev_size, &mb0);
|
|
ntfs_warn(
|
|
sb,
|
|
"RAW NTFS volume: Filesystem size %u.%02u Gb > volume size %u.%02u Gb. Mount in read-only.",
|
|
gb, mb, gb0, mb0);
|
|
sb->s_flags |= SB_RDONLY;
|
|
}
|
|
|
|
clusters = sbi->volume.size >> cluster_bits;
|
|
#ifndef CONFIG_NTFS3_64BIT_CLUSTER
|
|
/* 32 bits per cluster. */
|
|
if (clusters >> 32) {
|
|
ntfs_notice(
|
|
sb,
|
|
"NTFS %u.%02u Gb is too big to use 32 bits per cluster.",
|
|
gb, mb);
|
|
goto out;
|
|
}
|
|
#elif BITS_PER_LONG < 64
|
|
#error "CONFIG_NTFS3_64BIT_CLUSTER incompatible in 32 bit OS"
|
|
#endif
|
|
|
|
sbi->used.bitmap.nbits = clusters;
|
|
|
|
rec = kzalloc(record_size, GFP_NOFS);
|
|
if (!rec) {
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
sbi->new_rec = rec;
|
|
rec->rhdr.sign = NTFS_FILE_SIGNATURE;
|
|
rec->rhdr.fix_off = cpu_to_le16(MFTRECORD_FIXUP_OFFSET_1);
|
|
fn = (sbi->record_size >> SECTOR_SHIFT) + 1;
|
|
rec->rhdr.fix_num = cpu_to_le16(fn);
|
|
ao = ALIGN(MFTRECORD_FIXUP_OFFSET_1 + sizeof(short) * fn, 8);
|
|
rec->attr_off = cpu_to_le16(ao);
|
|
rec->used = cpu_to_le32(ao + ALIGN(sizeof(enum ATTR_TYPE), 8));
|
|
rec->total = cpu_to_le32(sbi->record_size);
|
|
((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END;
|
|
|
|
sb_set_blocksize(sb, min_t(u32, sbi->cluster_size, PAGE_SIZE));
|
|
|
|
sbi->block_mask = sb->s_blocksize - 1;
|
|
sbi->blocks_per_cluster = sbi->cluster_size >> sb->s_blocksize_bits;
|
|
sbi->volume.blocks = sbi->volume.size >> sb->s_blocksize_bits;
|
|
|
|
/* Maximum size for normal files. */
|
|
sbi->maxbytes = (clusters << cluster_bits) - 1;
|
|
|
|
#ifdef CONFIG_NTFS3_64BIT_CLUSTER
|
|
if (clusters >= (1ull << (64 - cluster_bits)))
|
|
sbi->maxbytes = -1;
|
|
sbi->maxbytes_sparse = -1;
|
|
sb->s_maxbytes = MAX_LFS_FILESIZE;
|
|
#else
|
|
/* Maximum size for sparse file. */
|
|
sbi->maxbytes_sparse = (1ull << (cluster_bits + 32)) - 1;
|
|
sb->s_maxbytes = 0xFFFFFFFFull << cluster_bits;
|
|
#endif
|
|
|
|
/*
|
|
* Compute the MFT zone at two steps.
|
|
* It would be nice if we are able to allocate 1/8 of
|
|
* total clusters for MFT but not more then 512 MB.
|
|
*/
|
|
sbi->zone_max = min_t(CLST, 0x20000000 >> cluster_bits, clusters >> 3);
|
|
|
|
err = 0;
|
|
|
|
out:
|
|
brelse(bh);
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* ntfs_fill_super - Try to mount.
|
|
*/
|
|
static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc)
|
|
{
|
|
int err;
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
struct block_device *bdev = sb->s_bdev;
|
|
struct ntfs_mount_options *options;
|
|
struct inode *inode;
|
|
struct ntfs_inode *ni;
|
|
size_t i, tt, bad_len, bad_frags;
|
|
CLST vcn, lcn, len;
|
|
struct ATTRIB *attr;
|
|
const struct VOLUME_INFO *info;
|
|
u32 idx, done, bytes;
|
|
struct ATTR_DEF_ENTRY *t;
|
|
u16 *shared;
|
|
struct MFT_REF ref;
|
|
|
|
ref.high = 0;
|
|
|
|
sbi->sb = sb;
|
|
sbi->options = options = fc->fs_private;
|
|
fc->fs_private = NULL;
|
|
sb->s_flags |= SB_NODIRATIME;
|
|
sb->s_magic = 0x7366746e; // "ntfs"
|
|
sb->s_op = &ntfs_sops;
|
|
sb->s_export_op = &ntfs_export_ops;
|
|
sb->s_time_gran = NTFS_TIME_GRAN; // 100 nsec
|
|
sb->s_xattr = ntfs_xattr_handlers;
|
|
sb->s_d_op = options->nocase ? &ntfs_dentry_ops : NULL;
|
|
|
|
options->nls = ntfs_load_nls(options->nls_name);
|
|
if (IS_ERR(options->nls)) {
|
|
options->nls = NULL;
|
|
errorf(fc, "Cannot load nls %s", options->nls_name);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (bdev_max_discard_sectors(bdev) && bdev_discard_granularity(bdev)) {
|
|
sbi->discard_granularity = bdev_discard_granularity(bdev);
|
|
sbi->discard_granularity_mask_inv =
|
|
~(u64)(sbi->discard_granularity - 1);
|
|
}
|
|
|
|
/* Parse boot. */
|
|
err = ntfs_init_from_boot(sb, bdev_logical_block_size(bdev),
|
|
bdev_nr_bytes(bdev));
|
|
if (err)
|
|
goto out;
|
|
|
|
/*
|
|
* Load $Volume. This should be done before $LogFile
|
|
* 'cause 'sbi->volume.ni' is used 'ntfs_set_state'.
|
|
*/
|
|
ref.low = cpu_to_le32(MFT_REC_VOL);
|
|
ref.seq = cpu_to_le16(MFT_REC_VOL);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_VOLUME);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load $Volume (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
ni = ntfs_i(inode);
|
|
|
|
/* Load and save label (not necessary). */
|
|
attr = ni_find_attr(ni, NULL, NULL, ATTR_LABEL, NULL, 0, NULL, NULL);
|
|
|
|
if (!attr) {
|
|
/* It is ok if no ATTR_LABEL */
|
|
} else if (!attr->non_res && !is_attr_ext(attr)) {
|
|
/* $AttrDef allows labels to be up to 128 symbols. */
|
|
err = utf16s_to_utf8s(resident_data(attr),
|
|
le32_to_cpu(attr->res.data_size) >> 1,
|
|
UTF16_LITTLE_ENDIAN, sbi->volume.label,
|
|
sizeof(sbi->volume.label));
|
|
if (err < 0)
|
|
sbi->volume.label[0] = 0;
|
|
} else {
|
|
/* Should we break mounting here? */
|
|
//err = -EINVAL;
|
|
//goto put_inode_out;
|
|
}
|
|
|
|
attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL);
|
|
if (!attr || is_attr_ext(attr) ||
|
|
!(info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO))) {
|
|
ntfs_err(sb, "$Volume is corrupted.");
|
|
err = -EINVAL;
|
|
goto put_inode_out;
|
|
}
|
|
|
|
sbi->volume.major_ver = info->major_ver;
|
|
sbi->volume.minor_ver = info->minor_ver;
|
|
sbi->volume.flags = info->flags;
|
|
sbi->volume.ni = ni;
|
|
|
|
/* Load $MFTMirr to estimate recs_mirr. */
|
|
ref.low = cpu_to_le32(MFT_REC_MIRR);
|
|
ref.seq = cpu_to_le16(MFT_REC_MIRR);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_MIRROR);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load $MFTMirr (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
sbi->mft.recs_mirr = ntfs_up_cluster(sbi, inode->i_size) >>
|
|
sbi->record_bits;
|
|
|
|
iput(inode);
|
|
|
|
/* Load LogFile to replay. */
|
|
ref.low = cpu_to_le32(MFT_REC_LOG);
|
|
ref.seq = cpu_to_le16(MFT_REC_LOG);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_LOGFILE);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load \x24LogFile (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
ni = ntfs_i(inode);
|
|
|
|
err = ntfs_loadlog_and_replay(ni, sbi);
|
|
if (err)
|
|
goto put_inode_out;
|
|
|
|
iput(inode);
|
|
|
|
if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) {
|
|
if (!sb_rdonly(sb)) {
|
|
ntfs_warn(sb,
|
|
"failed to replay log file. Can't mount rw!");
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
} else if (sbi->volume.flags & VOLUME_FLAG_DIRTY) {
|
|
if (!sb_rdonly(sb) && !options->force) {
|
|
ntfs_warn(
|
|
sb,
|
|
"volume is dirty and \"force\" flag is not set!");
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/* Load $MFT. */
|
|
ref.low = cpu_to_le32(MFT_REC_MFT);
|
|
ref.seq = cpu_to_le16(1);
|
|
|
|
inode = ntfs_iget5(sb, &ref, &NAME_MFT);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load $MFT (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
ni = ntfs_i(inode);
|
|
|
|
sbi->mft.used = ni->i_valid >> sbi->record_bits;
|
|
tt = inode->i_size >> sbi->record_bits;
|
|
sbi->mft.next_free = MFT_REC_USER;
|
|
|
|
err = wnd_init(&sbi->mft.bitmap, sb, tt);
|
|
if (err)
|
|
goto put_inode_out;
|
|
|
|
err = ni_load_all_mi(ni);
|
|
if (err) {
|
|
ntfs_err(sb, "Failed to load $MFT's subrecords (%d).", err);
|
|
goto put_inode_out;
|
|
}
|
|
|
|
sbi->mft.ni = ni;
|
|
|
|
/* Load $Bitmap. */
|
|
ref.low = cpu_to_le32(MFT_REC_BITMAP);
|
|
ref.seq = cpu_to_le16(MFT_REC_BITMAP);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_BITMAP);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load $Bitmap (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
#ifndef CONFIG_NTFS3_64BIT_CLUSTER
|
|
if (inode->i_size >> 32) {
|
|
err = -EINVAL;
|
|
goto put_inode_out;
|
|
}
|
|
#endif
|
|
|
|
/* Check bitmap boundary. */
|
|
tt = sbi->used.bitmap.nbits;
|
|
if (inode->i_size < bitmap_size(tt)) {
|
|
ntfs_err(sb, "$Bitmap is corrupted.");
|
|
err = -EINVAL;
|
|
goto put_inode_out;
|
|
}
|
|
|
|
err = wnd_init(&sbi->used.bitmap, sb, tt);
|
|
if (err) {
|
|
ntfs_err(sb, "Failed to initialize $Bitmap (%d).", err);
|
|
goto put_inode_out;
|
|
}
|
|
|
|
iput(inode);
|
|
|
|
/* Compute the MFT zone. */
|
|
err = ntfs_refresh_zone(sbi);
|
|
if (err) {
|
|
ntfs_err(sb, "Failed to initialize MFT zone (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
/* Load $BadClus. */
|
|
ref.low = cpu_to_le32(MFT_REC_BADCLUST);
|
|
ref.seq = cpu_to_le16(MFT_REC_BADCLUST);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_BADCLUS);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load $BadClus (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
ni = ntfs_i(inode);
|
|
bad_len = bad_frags = 0;
|
|
for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) {
|
|
if (lcn == SPARSE_LCN)
|
|
continue;
|
|
|
|
bad_len += len;
|
|
bad_frags += 1;
|
|
if (sb_rdonly(sb))
|
|
continue;
|
|
|
|
if (wnd_set_used_safe(&sbi->used.bitmap, lcn, len, &tt) || tt) {
|
|
/* Bad blocks marked as free in bitmap. */
|
|
ntfs_set_state(sbi, NTFS_DIRTY_ERROR);
|
|
}
|
|
}
|
|
if (bad_len) {
|
|
/*
|
|
* Notice about bad blocks.
|
|
* In normal cases these blocks are marked as used in bitmap.
|
|
* And we never allocate space in it.
|
|
*/
|
|
ntfs_notice(sb,
|
|
"Volume contains %zu bad blocks in %zu fragments.",
|
|
bad_len, bad_frags);
|
|
}
|
|
iput(inode);
|
|
|
|
/* Load $AttrDef. */
|
|
ref.low = cpu_to_le32(MFT_REC_ATTR);
|
|
ref.seq = cpu_to_le16(MFT_REC_ATTR);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_ATTRDEF);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load $AttrDef (%d)", err);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Typical $AttrDef contains up to 20 entries.
|
|
* Check for extremely large/small size.
|
|
*/
|
|
if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY) ||
|
|
inode->i_size > 100 * sizeof(struct ATTR_DEF_ENTRY)) {
|
|
ntfs_err(sb, "Looks like $AttrDef is corrupted (size=%llu).",
|
|
inode->i_size);
|
|
err = -EINVAL;
|
|
goto put_inode_out;
|
|
}
|
|
|
|
bytes = inode->i_size;
|
|
sbi->def_table = t = kmalloc(bytes, GFP_NOFS | __GFP_NOWARN);
|
|
if (!t) {
|
|
err = -ENOMEM;
|
|
goto put_inode_out;
|
|
}
|
|
|
|
for (done = idx = 0; done < bytes; done += PAGE_SIZE, idx++) {
|
|
unsigned long tail = bytes - done;
|
|
struct page *page = ntfs_map_page(inode->i_mapping, idx);
|
|
|
|
if (IS_ERR(page)) {
|
|
err = PTR_ERR(page);
|
|
ntfs_err(sb, "Failed to read $AttrDef (%d).", err);
|
|
goto put_inode_out;
|
|
}
|
|
memcpy(Add2Ptr(t, done), page_address(page),
|
|
min(PAGE_SIZE, tail));
|
|
ntfs_unmap_page(page);
|
|
|
|
if (!idx && ATTR_STD != t->type) {
|
|
ntfs_err(sb, "$AttrDef is corrupted.");
|
|
err = -EINVAL;
|
|
goto put_inode_out;
|
|
}
|
|
}
|
|
|
|
t += 1;
|
|
sbi->def_entries = 1;
|
|
done = sizeof(struct ATTR_DEF_ENTRY);
|
|
sbi->reparse.max_size = MAXIMUM_REPARSE_DATA_BUFFER_SIZE;
|
|
sbi->ea_max_size = 0x10000; /* default formatter value */
|
|
|
|
while (done + sizeof(struct ATTR_DEF_ENTRY) <= bytes) {
|
|
u32 t32 = le32_to_cpu(t->type);
|
|
u64 sz = le64_to_cpu(t->max_sz);
|
|
|
|
if ((t32 & 0xF) || le32_to_cpu(t[-1].type) >= t32)
|
|
break;
|
|
|
|
if (t->type == ATTR_REPARSE)
|
|
sbi->reparse.max_size = sz;
|
|
else if (t->type == ATTR_EA)
|
|
sbi->ea_max_size = sz;
|
|
|
|
done += sizeof(struct ATTR_DEF_ENTRY);
|
|
t += 1;
|
|
sbi->def_entries += 1;
|
|
}
|
|
iput(inode);
|
|
|
|
/* Load $UpCase. */
|
|
ref.low = cpu_to_le32(MFT_REC_UPCASE);
|
|
ref.seq = cpu_to_le16(MFT_REC_UPCASE);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_UPCASE);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load $UpCase (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
if (inode->i_size != 0x10000 * sizeof(short)) {
|
|
err = -EINVAL;
|
|
ntfs_err(sb, "$UpCase is corrupted.");
|
|
goto put_inode_out;
|
|
}
|
|
|
|
for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) {
|
|
const __le16 *src;
|
|
u16 *dst = Add2Ptr(sbi->upcase, idx << PAGE_SHIFT);
|
|
struct page *page = ntfs_map_page(inode->i_mapping, idx);
|
|
|
|
if (IS_ERR(page)) {
|
|
err = PTR_ERR(page);
|
|
ntfs_err(sb, "Failed to read $UpCase (%d).", err);
|
|
goto put_inode_out;
|
|
}
|
|
|
|
src = page_address(page);
|
|
|
|
#ifdef __BIG_ENDIAN
|
|
for (i = 0; i < PAGE_SIZE / sizeof(u16); i++)
|
|
*dst++ = le16_to_cpu(*src++);
|
|
#else
|
|
memcpy(dst, src, PAGE_SIZE);
|
|
#endif
|
|
ntfs_unmap_page(page);
|
|
}
|
|
|
|
shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short));
|
|
if (shared && sbi->upcase != shared) {
|
|
kvfree(sbi->upcase);
|
|
sbi->upcase = shared;
|
|
}
|
|
|
|
iput(inode);
|
|
|
|
if (is_ntfs3(sbi)) {
|
|
/* Load $Secure. */
|
|
err = ntfs_security_init(sbi);
|
|
if (err) {
|
|
ntfs_err(sb, "Failed to initialize $Secure (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
/* Load $Extend. */
|
|
err = ntfs_extend_init(sbi);
|
|
if (err) {
|
|
ntfs_warn(sb, "Failed to initialize $Extend.");
|
|
goto load_root;
|
|
}
|
|
|
|
/* Load $Extend/$Reparse. */
|
|
err = ntfs_reparse_init(sbi);
|
|
if (err) {
|
|
ntfs_warn(sb, "Failed to initialize $Extend/$Reparse.");
|
|
goto load_root;
|
|
}
|
|
|
|
/* Load $Extend/$ObjId. */
|
|
err = ntfs_objid_init(sbi);
|
|
if (err) {
|
|
ntfs_warn(sb, "Failed to initialize $Extend/$ObjId.");
|
|
goto load_root;
|
|
}
|
|
}
|
|
|
|
load_root:
|
|
/* Load root. */
|
|
ref.low = cpu_to_le32(MFT_REC_ROOT);
|
|
ref.seq = cpu_to_le16(MFT_REC_ROOT);
|
|
inode = ntfs_iget5(sb, &ref, &NAME_ROOT);
|
|
if (IS_ERR(inode)) {
|
|
err = PTR_ERR(inode);
|
|
ntfs_err(sb, "Failed to load root (%d).", err);
|
|
goto out;
|
|
}
|
|
|
|
/*
|
|
* Final check. Looks like this case should never occurs.
|
|
*/
|
|
if (!inode->i_op) {
|
|
err = -EINVAL;
|
|
ntfs_err(sb, "Failed to load root (%d).", err);
|
|
goto put_inode_out;
|
|
}
|
|
|
|
sb->s_root = d_make_root(inode);
|
|
if (!sb->s_root) {
|
|
err = -ENOMEM;
|
|
goto put_inode_out;
|
|
}
|
|
|
|
return 0;
|
|
|
|
put_inode_out:
|
|
iput(inode);
|
|
out:
|
|
/*
|
|
* Free resources here.
|
|
* ntfs_fs_free will be called with fc->s_fs_info = NULL
|
|
*/
|
|
put_mount_options(sbi->options);
|
|
put_ntfs(sbi);
|
|
sb->s_fs_info = NULL;
|
|
|
|
return err;
|
|
}
|
|
|
|
void ntfs_unmap_meta(struct super_block *sb, CLST lcn, CLST len)
|
|
{
|
|
struct ntfs_sb_info *sbi = sb->s_fs_info;
|
|
struct block_device *bdev = sb->s_bdev;
|
|
sector_t devblock = (u64)lcn * sbi->blocks_per_cluster;
|
|
unsigned long blocks = (u64)len * sbi->blocks_per_cluster;
|
|
unsigned long cnt = 0;
|
|
unsigned long limit = global_zone_page_state(NR_FREE_PAGES)
|
|
<< (PAGE_SHIFT - sb->s_blocksize_bits);
|
|
|
|
if (limit >= 0x2000)
|
|
limit -= 0x1000;
|
|
else if (limit < 32)
|
|
limit = 32;
|
|
else
|
|
limit >>= 1;
|
|
|
|
while (blocks--) {
|
|
clean_bdev_aliases(bdev, devblock++, 1);
|
|
if (cnt++ >= limit) {
|
|
sync_blockdev(bdev);
|
|
cnt = 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ntfs_discard - Issue a discard request (trim for SSD).
|
|
*/
|
|
int ntfs_discard(struct ntfs_sb_info *sbi, CLST lcn, CLST len)
|
|
{
|
|
int err;
|
|
u64 lbo, bytes, start, end;
|
|
struct super_block *sb;
|
|
|
|
if (sbi->used.next_free_lcn == lcn + len)
|
|
sbi->used.next_free_lcn = lcn;
|
|
|
|
if (sbi->flags & NTFS_FLAGS_NODISCARD)
|
|
return -EOPNOTSUPP;
|
|
|
|
if (!sbi->options->discard)
|
|
return -EOPNOTSUPP;
|
|
|
|
lbo = (u64)lcn << sbi->cluster_bits;
|
|
bytes = (u64)len << sbi->cluster_bits;
|
|
|
|
/* Align up 'start' on discard_granularity. */
|
|
start = (lbo + sbi->discard_granularity - 1) &
|
|
sbi->discard_granularity_mask_inv;
|
|
/* Align down 'end' on discard_granularity. */
|
|
end = (lbo + bytes) & sbi->discard_granularity_mask_inv;
|
|
|
|
sb = sbi->sb;
|
|
if (start >= end)
|
|
return 0;
|
|
|
|
err = blkdev_issue_discard(sb->s_bdev, start >> 9, (end - start) >> 9,
|
|
GFP_NOFS);
|
|
|
|
if (err == -EOPNOTSUPP)
|
|
sbi->flags |= NTFS_FLAGS_NODISCARD;
|
|
|
|
return err;
|
|
}
|
|
|
|
static int ntfs_fs_get_tree(struct fs_context *fc)
|
|
{
|
|
return get_tree_bdev(fc, ntfs_fill_super);
|
|
}
|
|
|
|
/*
|
|
* ntfs_fs_free - Free fs_context.
|
|
*
|
|
* Note that this will be called after fill_super and reconfigure
|
|
* even when they pass. So they have to take pointers if they pass.
|
|
*/
|
|
static void ntfs_fs_free(struct fs_context *fc)
|
|
{
|
|
struct ntfs_mount_options *opts = fc->fs_private;
|
|
struct ntfs_sb_info *sbi = fc->s_fs_info;
|
|
|
|
if (sbi)
|
|
put_ntfs(sbi);
|
|
|
|
if (opts)
|
|
put_mount_options(opts);
|
|
}
|
|
|
|
static const struct fs_context_operations ntfs_context_ops = {
|
|
.parse_param = ntfs_fs_parse_param,
|
|
.get_tree = ntfs_fs_get_tree,
|
|
.reconfigure = ntfs_fs_reconfigure,
|
|
.free = ntfs_fs_free,
|
|
};
|
|
|
|
/*
|
|
* ntfs_init_fs_context - Initialize sbi and opts
|
|
*
|
|
* This will called when mount/remount. We will first initialize
|
|
* options so that if remount we can use just that.
|
|
*/
|
|
static int ntfs_init_fs_context(struct fs_context *fc)
|
|
{
|
|
struct ntfs_mount_options *opts;
|
|
struct ntfs_sb_info *sbi;
|
|
|
|
opts = kzalloc(sizeof(struct ntfs_mount_options), GFP_NOFS);
|
|
if (!opts)
|
|
return -ENOMEM;
|
|
|
|
/* Default options. */
|
|
opts->fs_uid = current_uid();
|
|
opts->fs_gid = current_gid();
|
|
opts->fs_fmask_inv = ~current_umask();
|
|
opts->fs_dmask_inv = ~current_umask();
|
|
|
|
if (fc->purpose == FS_CONTEXT_FOR_RECONFIGURE)
|
|
goto ok;
|
|
|
|
sbi = kzalloc(sizeof(struct ntfs_sb_info), GFP_NOFS);
|
|
if (!sbi)
|
|
goto free_opts;
|
|
|
|
sbi->upcase = kvmalloc(0x10000 * sizeof(short), GFP_KERNEL);
|
|
if (!sbi->upcase)
|
|
goto free_sbi;
|
|
|
|
ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL,
|
|
DEFAULT_RATELIMIT_BURST);
|
|
|
|
mutex_init(&sbi->compress.mtx_lznt);
|
|
#ifdef CONFIG_NTFS3_LZX_XPRESS
|
|
mutex_init(&sbi->compress.mtx_xpress);
|
|
mutex_init(&sbi->compress.mtx_lzx);
|
|
#endif
|
|
|
|
fc->s_fs_info = sbi;
|
|
ok:
|
|
fc->fs_private = opts;
|
|
fc->ops = &ntfs_context_ops;
|
|
|
|
return 0;
|
|
free_sbi:
|
|
kfree(sbi);
|
|
free_opts:
|
|
kfree(opts);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
// clang-format off
|
|
static struct file_system_type ntfs_fs_type = {
|
|
.owner = THIS_MODULE,
|
|
.name = "ntfs3",
|
|
.init_fs_context = ntfs_init_fs_context,
|
|
.parameters = ntfs_fs_parameters,
|
|
.kill_sb = kill_block_super,
|
|
.fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP,
|
|
};
|
|
// clang-format on
|
|
|
|
static int __init init_ntfs_fs(void)
|
|
{
|
|
int err;
|
|
|
|
pr_info("ntfs3: Max link count %u\n", NTFS_LINK_MAX);
|
|
|
|
if (IS_ENABLED(CONFIG_NTFS3_FS_POSIX_ACL))
|
|
pr_info("ntfs3: Enabled Linux POSIX ACLs support\n");
|
|
if (IS_ENABLED(CONFIG_NTFS3_64BIT_CLUSTER))
|
|
pr_notice(
|
|
"ntfs3: Warning: Activated 64 bits per cluster. Windows does not support this\n");
|
|
if (IS_ENABLED(CONFIG_NTFS3_LZX_XPRESS))
|
|
pr_info("ntfs3: Read-only LZX/Xpress compression included\n");
|
|
|
|
err = ntfs3_init_bitmap();
|
|
if (err)
|
|
return err;
|
|
|
|
ntfs_inode_cachep = kmem_cache_create(
|
|
"ntfs_inode_cache", sizeof(struct ntfs_inode), 0,
|
|
(SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT),
|
|
init_once);
|
|
if (!ntfs_inode_cachep) {
|
|
err = -ENOMEM;
|
|
goto out1;
|
|
}
|
|
|
|
err = register_filesystem(&ntfs_fs_type);
|
|
if (err)
|
|
goto out;
|
|
|
|
return 0;
|
|
out:
|
|
kmem_cache_destroy(ntfs_inode_cachep);
|
|
out1:
|
|
ntfs3_exit_bitmap();
|
|
return err;
|
|
}
|
|
|
|
static void __exit exit_ntfs_fs(void)
|
|
{
|
|
rcu_barrier();
|
|
kmem_cache_destroy(ntfs_inode_cachep);
|
|
unregister_filesystem(&ntfs_fs_type);
|
|
ntfs3_exit_bitmap();
|
|
}
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("ntfs3 read/write filesystem");
|
|
#ifdef CONFIG_NTFS3_FS_POSIX_ACL
|
|
MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support");
|
|
#endif
|
|
#ifdef CONFIG_NTFS3_64BIT_CLUSTER
|
|
MODULE_INFO(
|
|
cluster,
|
|
"Warning: Activated 64 bits per cluster. Windows does not support this");
|
|
#endif
|
|
#ifdef CONFIG_NTFS3_LZX_XPRESS
|
|
MODULE_INFO(compression, "Read-only lzx/xpress compression included");
|
|
#endif
|
|
|
|
MODULE_AUTHOR("Konstantin Komarov");
|
|
MODULE_ALIAS_FS("ntfs3");
|
|
|
|
module_init(init_ntfs_fs);
|
|
module_exit(exit_ntfs_fs);
|