fs/ntfs3: Add initialization of super block
This adds initialization of super block
Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
new file mode 100644
index 0000000..6be13e2
--- /dev/null
+++ b/fs/ntfs3/super.c
@@ -0,0 +1,1504 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ *
+ * Copyright (C) 2019-2021 Paragon Software GmbH, All rights reserved.
+ *
+ *
+ * terminology
+ *
+ * cluster - allocation unit - 512,1K,2K,4K,...,2M
+ * vcn - virtual cluster number - offset inside the file in clusters
+ * vbo - virtual byte offset - offset inside the file in bytes
+ * lcn - logical cluster number - 0 based cluster in clusters heap
+ * lbo - logical byte offset - absolute position inside volume
+ * run - maps vcn to lcn - stored in attributes in packed form
+ * attr - attribute segment - std/name/data etc records inside MFT
+ * mi - mft inode - one MFT record(usually 1024 bytes or 4K), consists of attributes
+ * ni - ntfs inode - extends linux inode. consists of one or more mft inodes
+ * index - unit inside directory - 2K, 4K, <=page size, does not depend on cluster size
+ *
+ * WSL - Windows Subsystem for Linux
+ * https://docs.microsoft.com/en-us/windows/wsl/file-permissions
+ * It stores uid/gid/mode/dev in xattr
+ *
+ */
+
+#include <linux/backing-dev.h>
+#include <linux/blkdev.h>
+#include <linux/buffer_head.h>
+#include <linux/exportfs.h>
+#include <linux/fs.h>
+#include <linux/iversion.h>
+#include <linux/module.h>
+#include <linux/nls.h>
+#include <linux/parser.h>
+#include <linux/seq_file.h>
+#include <linux/statfs.h>
+
+#include "debug.h"
+#include "ntfs.h"
+#include "ntfs_fs.h"
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+#include "lib/lib.h"
+#endif
+
+#ifdef CONFIG_PRINTK
+/*
+ * Trace warnings/notices/errors
+ * Thanks Joe Perches <joe@perches.com> for implementation
+ */
+void ntfs_printk(const struct super_block *sb, const char *fmt, ...)
+{
+ struct va_format vaf;
+ va_list args;
+ int level;
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+
+ /*should we use different ratelimits for warnings/notices/errors? */
+ if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
+ return;
+
+ va_start(args, fmt);
+
+ level = printk_get_level(fmt);
+ vaf.fmt = printk_skip_level(fmt);
+ vaf.va = &args;
+ printk("%c%cntfs3: %s: %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf);
+
+ va_end(args);
+}
+
+static char s_name_buf[512];
+static atomic_t s_name_buf_cnt = ATOMIC_INIT(1); // 1 means 'free s_name_buf'
+
+/* print warnings/notices/errors about inode using name or inode number */
+void ntfs_inode_printk(struct inode *inode, const char *fmt, ...)
+{
+ struct super_block *sb = inode->i_sb;
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+ char *name;
+ va_list args;
+ struct va_format vaf;
+ int level;
+
+ if (!___ratelimit(&sbi->msg_ratelimit, "ntfs3"))
+ return;
+
+ /* use static allocated buffer, if possible */
+ name = atomic_dec_and_test(&s_name_buf_cnt)
+ ? s_name_buf
+ : kmalloc(sizeof(s_name_buf), GFP_NOFS);
+
+ if (name) {
+ struct dentry *de = d_find_alias(inode);
+ const u32 name_len = ARRAY_SIZE(s_name_buf) - 1;
+
+ if (de) {
+ spin_lock(&de->d_lock);
+ snprintf(name, name_len, " \"%s\"", de->d_name.name);
+ spin_unlock(&de->d_lock);
+ name[name_len] = 0; /* to be sure*/
+ } else {
+ name[0] = 0;
+ }
+ dput(de); /* cocci warns if placed in branch "if (de)" */
+ }
+
+ va_start(args, fmt);
+
+ level = printk_get_level(fmt);
+ vaf.fmt = printk_skip_level(fmt);
+ vaf.va = &args;
+
+ printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level,
+ sb->s_id, inode->i_ino, name ? name : "", &vaf);
+
+ va_end(args);
+
+ atomic_inc(&s_name_buf_cnt);
+ if (name != s_name_buf)
+ kfree(name);
+}
+#endif
+
+/*
+ * Shared memory struct.
+ *
+ * on-disk ntfs's upcase table is created by ntfs formater
+ * 'upcase' table is 128K bytes of memory
+ * we should read it into memory when mounting
+ * Several ntfs volumes likely use the same 'upcase' table
+ * It is good idea to share in-memory 'upcase' table between different volumes
+ * Unfortunately winxp/vista/win7 use different upcase tables
+ */
+static DEFINE_SPINLOCK(s_shared_lock);
+
+static struct {
+ void *ptr;
+ u32 len;
+ int cnt;
+} s_shared[8];
+
+/*
+ * ntfs_set_shared
+ *
+ * Returns 'ptr' if pointer was saved in shared memory
+ * Returns NULL if pointer was not shared
+ */
+void *ntfs_set_shared(void *ptr, u32 bytes)
+{
+ void *ret = NULL;
+ int i, j = -1;
+
+ spin_lock(&s_shared_lock);
+ for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
+ if (!s_shared[i].cnt) {
+ j = i;
+ } else if (bytes == s_shared[i].len &&
+ !memcmp(s_shared[i].ptr, ptr, bytes)) {
+ s_shared[i].cnt += 1;
+ ret = s_shared[i].ptr;
+ break;
+ }
+ }
+
+ if (!ret && j != -1) {
+ s_shared[j].ptr = ptr;
+ s_shared[j].len = bytes;
+ s_shared[j].cnt = 1;
+ ret = ptr;
+ }
+ spin_unlock(&s_shared_lock);
+
+ return ret;
+}
+
+/*
+ * ntfs_put_shared
+ *
+ * Returns 'ptr' if pointer is not shared anymore
+ * Returns NULL if pointer is still shared
+ */
+void *ntfs_put_shared(void *ptr)
+{
+ void *ret = ptr;
+ int i;
+
+ spin_lock(&s_shared_lock);
+ for (i = 0; i < ARRAY_SIZE(s_shared); i++) {
+ if (s_shared[i].cnt && s_shared[i].ptr == ptr) {
+ if (--s_shared[i].cnt)
+ ret = NULL;
+ break;
+ }
+ }
+ spin_unlock(&s_shared_lock);
+
+ return ret;
+}
+
+static inline void clear_mount_options(struct ntfs_mount_options *options)
+{
+ unload_nls(options->nls);
+}
+
+enum Opt {
+ Opt_uid,
+ Opt_gid,
+ Opt_umask,
+ Opt_dmask,
+ Opt_fmask,
+ Opt_immutable,
+ Opt_discard,
+ Opt_force,
+ Opt_sparse,
+ Opt_nohidden,
+ Opt_showmeta,
+ Opt_acl,
+ Opt_noatime,
+ Opt_nls,
+ Opt_prealloc,
+ Opt_no_acs_rules,
+ Opt_err,
+};
+
+static const match_table_t ntfs_tokens = {
+ { Opt_uid, "uid=%u" },
+ { Opt_gid, "gid=%u" },
+ { Opt_umask, "umask=%o" },
+ { Opt_dmask, "dmask=%o" },
+ { Opt_fmask, "fmask=%o" },
+ { Opt_immutable, "sys_immutable" },
+ { Opt_discard, "discard" },
+ { Opt_force, "force" },
+ { Opt_sparse, "sparse" },
+ { Opt_nohidden, "nohidden" },
+ { Opt_acl, "acl" },
+ { Opt_noatime, "noatime" },
+ { Opt_showmeta, "showmeta" },
+ { Opt_nls, "nls=%s" },
+ { Opt_prealloc, "prealloc" },
+ { Opt_no_acs_rules, "no_acs_rules" },
+ { Opt_err, NULL },
+};
+
+static noinline int ntfs_parse_options(struct super_block *sb, char *options,
+ int silent,
+ struct ntfs_mount_options *opts)
+{
+ char *p;
+ substring_t args[MAX_OPT_ARGS];
+ int option;
+ char nls_name[30];
+ struct nls_table *nls;
+
+ opts->fs_uid = current_uid();
+ opts->fs_gid = current_gid();
+ opts->fs_fmask_inv = opts->fs_dmask_inv = ~current_umask();
+ nls_name[0] = 0;
+
+ if (!options)
+ goto out;
+
+ while ((p = strsep(&options, ","))) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, ntfs_tokens, args);
+ switch (token) {
+ case Opt_immutable:
+ opts->sys_immutable = 1;
+ break;
+ case Opt_uid:
+ if (match_int(&args[0], &option))
+ return -EINVAL;
+ opts->fs_uid = make_kuid(current_user_ns(), option);
+ if (!uid_valid(opts->fs_uid))
+ return -EINVAL;
+ opts->uid = 1;
+ break;
+ case Opt_gid:
+ if (match_int(&args[0], &option))
+ return -EINVAL;
+ opts->fs_gid = make_kgid(current_user_ns(), option);
+ if (!gid_valid(opts->fs_gid))
+ return -EINVAL;
+ opts->gid = 1;
+ break;
+ case Opt_umask:
+ if (match_octal(&args[0], &option))
+ return -EINVAL;
+ opts->fs_fmask_inv = opts->fs_dmask_inv = ~option;
+ opts->fmask = opts->dmask = 1;
+ break;
+ case Opt_dmask:
+ if (match_octal(&args[0], &option))
+ return -EINVAL;
+ opts->fs_dmask_inv = ~option;
+ opts->dmask = 1;
+ break;
+ case Opt_fmask:
+ if (match_octal(&args[0], &option))
+ return -EINVAL;
+ opts->fs_fmask_inv = ~option;
+ opts->fmask = 1;
+ break;
+ case Opt_discard:
+ opts->discard = 1;
+ break;
+ case Opt_force:
+ opts->force = 1;
+ break;
+ case Opt_sparse:
+ opts->sparse = 1;
+ break;
+ case Opt_nohidden:
+ opts->nohidden = 1;
+ break;
+ case Opt_acl:
+#ifdef CONFIG_NTFS3_FS_POSIX_ACL
+ sb->s_flags |= SB_POSIXACL;
+ break;
+#else
+ ntfs_err(sb, "support for ACL not compiled in!");
+ return -EINVAL;
+#endif
+ case Opt_noatime:
+ sb->s_flags |= SB_NOATIME;
+ break;
+ case Opt_showmeta:
+ opts->showmeta = 1;
+ break;
+ case Opt_nls:
+ match_strlcpy(nls_name, &args[0], sizeof(nls_name));
+ break;
+ case Opt_prealloc:
+ opts->prealloc = 1;
+ break;
+ case Opt_no_acs_rules:
+ opts->no_acs_rules = 1;
+ break;
+ default:
+ if (!silent)
+ ntfs_err(
+ sb,
+ "Unrecognized mount option \"%s\" or missing value",
+ p);
+ //return -EINVAL;
+ }
+ }
+
+out:
+ if (!strcmp(nls_name[0] ? nls_name : CONFIG_NLS_DEFAULT, "utf8")) {
+ /* For UTF-8 use utf16s_to_utf8s/utf8s_to_utf16s instead of nls */
+ nls = NULL;
+ } else if (nls_name[0]) {
+ nls = load_nls(nls_name);
+ if (!nls) {
+ ntfs_err(sb, "failed to load \"%s\"", nls_name);
+ return -EINVAL;
+ }
+ } else {
+ nls = load_nls_default();
+ if (!nls) {
+ ntfs_err(sb, "failed to load default nls");
+ return -EINVAL;
+ }
+ }
+ opts->nls = nls;
+
+ return 0;
+}
+
+static int ntfs_remount(struct super_block *sb, int *flags, char *data)
+{
+ int err, ro_rw;
+ struct ntfs_sb_info *sbi = sb->s_fs_info;
+ struct ntfs_mount_options old_opts;
+ char *orig_data = kstrdup(data, GFP_KERNEL);
+
+ if (data && !orig_data)
+ return -ENOMEM;
+
+ /* Store original options */
+ memcpy(&old_opts, &sbi->options, sizeof(old_opts));
+ clear_mount_options(&sbi->options);
+ memset(&sbi->options, 0, sizeof(sbi->options));
+
+ err = ntfs_parse_options(sb, data, 0, &sbi->options);
+ if (err)
+ goto restore_opts;
+
+ ro_rw = sb_rdonly(sb) && !(*flags & SB_RDONLY);
+ if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) {
+ ntfs_warn(
+ sb,
+ "Couldn't remount rw because journal is not replayed. Please umount/remount instead\n");
+ err = -EINVAL;
+ goto restore_opts;
+ }
+
+ sync_filesystem(sb);
+
+ if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) &&
+ !sbi->options.force) {
+ ntfs_warn(sb, "volume is dirty and \"force\" flag is not set!");
+ err = -EINVAL;
+ goto restore_opts;
+ }
+
+ clear_mount_options(&old_opts);
+
+ *flags = (*flags & ~SB_LAZYTIME) | (sb->s_flags & SB_LAZYTIME) |
+ SB_NODIRATIME | SB_NOATIME;
+ ntfs_info(sb, "re-mounted. Opts: %s", orig_data);
+ err = 0;
+ goto out;
+
+restore_opts:
+ clear_mount_options(&sbi->options);
+ memcpy(&sbi->options, &old_opts, sizeof(old_opts));
+
+out:
+ kfree(orig_data);
+ return err;
+}
+
+static struct kmem_cache *ntfs_inode_cachep;
+
+static struct inode *ntfs_alloc_inode(struct super_block *sb)
+{
+ struct ntfs_inode *ni = kmem_cache_alloc(ntfs_inode_cachep, GFP_NOFS);
+
+ if (!ni)
+ return NULL;
+
+ memset(ni, 0, offsetof(struct ntfs_inode, vfs_inode));
+
+ mutex_init(&ni->ni_lock);
+
+ return &ni->vfs_inode;
+}
+
+static void ntfs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ struct ntfs_inode *ni = ntfs_i(inode);
+
+ mutex_destroy(&ni->ni_lock);
+
+ kmem_cache_free(ntfs_inode_cachep, ni);
+}
+
+static void ntfs_destroy_inode(struct inode *inode)
+{
+ call_rcu(&inode->i_rcu, ntfs_i_callback);
+}
+
+static void init_once(void *foo)
+{
+ struct ntfs_inode *ni = foo;
+
+ inode_init_once(&ni->vfs_inode);
+}
+
+/* noinline to reduce binary size*/
+static noinline void put_ntfs(struct ntfs_sb_info *sbi)
+{
+ ntfs_free(sbi->new_rec);
+ ntfs_vfree(ntfs_put_shared(sbi->upcase));
+ ntfs_free(sbi->def_table);
+
+ wnd_close(&sbi->mft.bitmap);
+ wnd_close(&sbi->used.bitmap);
+
+ if (sbi->mft.ni)
+ iput(&sbi->mft.ni->vfs_inode);
+
+ if (sbi->security.ni)
+ iput(&sbi->security.ni->vfs_inode);
+
+ if (sbi->reparse.ni)
+ iput(&sbi->reparse.ni->vfs_inode);
+
+ if (sbi->objid.ni)
+ iput(&sbi->objid.ni->vfs_inode);
+
+ if (sbi->volume.ni)
+ iput(&sbi->volume.ni->vfs_inode);
+
+ ntfs_update_mftmirr(sbi, 0);
+
+ indx_clear(&sbi->security.index_sii);
+ indx_clear(&sbi->security.index_sdh);
+ indx_clear(&sbi->reparse.index_r);
+ indx_clear(&sbi->objid.index_o);
+ ntfs_free(sbi->compress.lznt);
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+ xpress_free_decompressor(sbi->compress.xpress);
+ lzx_free_decompressor(sbi->compress.lzx);
+#endif
+ clear_mount_options(&sbi->options);
+
+ ntfs_free(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_ntfs(sbi);
+
+ 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);
+
+ if (opts->uid)
+ seq_printf(m, ",uid=%u",
+ from_kuid_munged(user_ns, opts->fs_uid));
+ if (opts->gid)
+ seq_printf(m, ",gid=%u",
+ from_kgid_munged(user_ns, opts->fs_gid));
+ if (opts->fmask)
+ seq_printf(m, ",fmask=%04o", ~opts->fs_fmask_inv);
+ if (opts->dmask)
+ seq_printf(m, ",dmask=%04o", ~opts->fs_dmask_inv);
+ if (opts->nls)
+ seq_printf(m, ",nls=%s", opts->nls->charset);
+ else
+ seq_puts(m, ",nls=utf8");
+ if (opts->sys_immutable)
+ seq_puts(m, ",sys_immutable");
+ if (opts->discard)
+ seq_puts(m, ",discard");
+ if (opts->sparse)
+ seq_puts(m, ",sparse");
+ if (opts->showmeta)
+ seq_puts(m, ",showmeta");
+ if (opts->nohidden)
+ seq_puts(m, ",nohidden");
+ if (opts->force)
+ seq_puts(m, ",force");
+ if (opts->no_acs_rules)
+ seq_puts(m, ",no_acs_rules");
+ if (opts->prealloc)
+ seq_puts(m, ",prealloc");
+ if (sb->s_flags & SB_POSIXACL)
+ seq_puts(m, ",acl");
+ if (sb->s_flags & SB_NOATIME)
+ seq_puts(m, ",noatime");
+
+ return 0;
+}
+
+/*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,
+ .destroy_inode = ntfs_destroy_inode,
+ .evict_inode = ntfs_evict_inode,
+ .put_super = ntfs_put_super,
+ .statfs = ntfs_statfs,
+ .show_options = ntfs_show_options,
+ .sync_fs = ntfs_sync_fs,
+ .remount_fs = ntfs_remount,
+ .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,
+};
+
+/* Returns 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)
+{
+ return boot->sectors_per_clusters <= 0x80
+ ? boot->sectors_per_clusters
+ : (1u << (0 - boot->sectors_per_clusters));
+}
+
+/* inits 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, fs_size, mlcn, mlcn2;
+ struct NTFS_BOOT *boot;
+ struct buffer_head *bh;
+ struct MFT_REC *rec;
+ u16 fn, ao;
+
+ 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))
+ 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;
+ if (boot->bytes_per_sector[0] || boot_sector_size < SECTOR_SIZE ||
+ !is_power_of2(boot_sector_size)) {
+ goto out;
+ }
+
+ /* cluster size: 512, 1K, 2K, 4K, ... 2M */
+ sct_per_clst = true_sectors_per_clst(boot);
+ if (!is_power_of2(sct_per_clst))
+ goto out;
+
+ 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)
+ goto out;
+
+ if (mlcn2 * sct_per_clst >= sectors)
+ goto out;
+
+ /* Check MFT record size */
+ if ((boot->record_size < 0 &&
+ SECTOR_SIZE > (2U << (-boot->record_size))) ||
+ (boot->record_size >= 0 && !is_power_of2(boot->record_size))) {
+ goto out;
+ }
+
+ /* Check index record size */
+ if ((boot->index_size < 0 &&
+ SECTOR_SIZE > (2U << (-boot->index_size))) ||
+ (boot->index_size >= 0 && !is_power_of2(boot->index_size))) {
+ goto out;
+ }
+
+ sbi->sector_size = boot_sector_size;
+ sbi->sector_bits = blksize_bits(boot_sector_size);
+ fs_size = (sectors + 1) << sbi->sector_bits;
+
+ gb = format_size_gb(fs_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 (sbi->sector_size != sector_size) {
+ ntfs_warn(sb,
+ "Different NTFS' sector size and media sector size");
+ dev_size += sector_size - 1;
+ }
+
+ sbi->cluster_size = boot_sector_size * sct_per_clst;
+ sbi->cluster_bits = blksize_bits(sbi->cluster_size);
+
+ sbi->mft.lbo = mlcn << sbi->cluster_bits;
+ sbi->mft.lbo2 = mlcn2 << sbi->cluster_bits;
+
+ if (sbi->cluster_size < sbi->sector_size)
+ goto out;
+
+ sbi->cluster_mask = sbi->cluster_size - 1;
+ sbi->cluster_mask_inv = ~(u64)sbi->cluster_mask;
+ sbi->record_size = record_size = boot->record_size < 0
+ ? 1 << (-boot->record_size)
+ : (u32)boot->record_size
+ << sbi->cluster_bits;
+
+ if (record_size > MAXIMUM_BYTES_PER_MFT)
+ goto out;
+
+ sbi->record_bits = blksize_bits(record_size);
+ sbi->attr_size_tr = (5 * record_size >> 4); // ~320 bytes
+
+ sbi->max_bytes_per_attr =
+ record_size - QuadAlign(MFTRECORD_FIXUP_OFFSET_1) -
+ QuadAlign(((record_size >> SECTOR_SHIFT) * sizeof(short))) -
+ QuadAlign(sizeof(enum ATTR_TYPE));
+
+ sbi->index_size = boot->index_size < 0
+ ? 1u << (-boot->index_size)
+ : (u32)boot->index_size << sbi->cluster_bits;
+
+ sbi->volume.ser_num = le64_to_cpu(boot->serial_num);
+ sbi->volume.size = sectors << sbi->sector_bits;
+
+ /* warning if RAW volume */
+ if (dev_size < fs_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 >> sbi->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 = ntfs_zalloc(record_size);
+ 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 = QuadAlign(MFTRECORD_FIXUP_OFFSET_1 + sizeof(short) * fn);
+ rec->attr_off = cpu_to_le16(ao);
+ rec->used = cpu_to_le32(ao + QuadAlign(sizeof(enum ATTR_TYPE)));
+ rec->total = cpu_to_le32(sbi->record_size);
+ ((struct ATTRIB *)Add2Ptr(rec, ao))->type = ATTR_END;
+
+ if (sbi->cluster_size < PAGE_SIZE)
+ sb_set_blocksize(sb, sbi->cluster_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 << sbi->cluster_bits) - 1;
+
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+ if (clusters >= (1ull << (64 - sbi->cluster_bits)))
+ sbi->maxbytes = -1;
+ sbi->maxbytes_sparse = -1;
+#else
+ /* Maximum size for sparse file */
+ sbi->maxbytes_sparse = (1ull << (sbi->cluster_bits + 32)) - 1;
+#endif
+
+ err = 0;
+
+out:
+ brelse(bh);
+
+ return err;
+}
+
+/* try to mount*/
+static int ntfs_fill_super(struct super_block *sb, void *data, int silent)
+{
+ int err;
+ struct ntfs_sb_info *sbi;
+ struct block_device *bdev = sb->s_bdev;
+ struct inode *bd_inode = bdev->bd_inode;
+ struct request_queue *rq = bdev_get_queue(bdev);
+ struct inode *inode = NULL;
+ struct ntfs_inode *ni;
+ size_t i, tt;
+ CLST vcn, lcn, len;
+ struct ATTRIB *attr;
+ const struct VOLUME_INFO *info;
+ u32 idx, done, bytes;
+ struct ATTR_DEF_ENTRY *t;
+ u16 *upcase = NULL;
+ u16 *shared;
+ bool is_ro;
+ struct MFT_REF ref;
+
+ ref.high = 0;
+
+ sbi = ntfs_zalloc(sizeof(struct ntfs_sb_info));
+ if (!sbi)
+ return -ENOMEM;
+
+ sb->s_fs_info = sbi;
+ sbi->sb = sb;
+ 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;
+
+ ratelimit_state_init(&sbi->msg_ratelimit, DEFAULT_RATELIMIT_INTERVAL,
+ DEFAULT_RATELIMIT_BURST);
+
+ err = ntfs_parse_options(sb, data, silent, &sbi->options);
+ if (err)
+ goto out;
+
+ if (!rq || !blk_queue_discard(rq) || !rq->limits.discard_granularity) {
+ ;
+ } else {
+ sbi->discard_granularity = rq->limits.discard_granularity;
+ sbi->discard_granularity_mask_inv =
+ ~(u64)(sbi->discard_granularity - 1);
+ }
+
+ sb_set_blocksize(sb, PAGE_SIZE);
+
+ /* parse boot */
+ err = ntfs_init_from_boot(sb, rq ? queue_logical_block_size(rq) : 512,
+ bd_inode->i_size);
+ if (err)
+ goto out;
+
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+#else
+ sb->s_maxbytes = 0xFFFFFFFFull << sbi->cluster_bits;
+#endif
+
+ mutex_init(&sbi->compress.mtx_lznt);
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+ mutex_init(&sbi->compress.mtx_xpress);
+ mutex_init(&sbi->compress.mtx_lzx);
+#endif
+
+ /*
+ * 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.");
+ inode = NULL;
+ 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 out;
+ }
+
+ attr = ni_find_attr(ni, attr, NULL, ATTR_VOL_INFO, NULL, 0, NULL, NULL);
+ if (!attr || is_attr_ext(attr)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ info = resident_data_ex(attr, SIZEOF_ATTRIBUTE_VOLUME_INFO);
+ if (!info) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ sbi->volume.major_ver = info->major_ver;
+ sbi->volume.minor_ver = info->minor_ver;
+ sbi->volume.flags = info->flags;
+
+ sbi->volume.ni = ni;
+ inode = NULL;
+
+ /* 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.");
+ inode = NULL;
+ 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.");
+ inode = NULL;
+ goto out;
+ }
+
+ ni = ntfs_i(inode);
+
+ err = ntfs_loadlog_and_replay(ni, sbi);
+ if (err)
+ goto out;
+
+ iput(inode);
+ inode = NULL;
+
+ is_ro = sb_rdonly(sbi->sb);
+
+ if (sbi->flags & NTFS_FLAGS_NEED_REPLAY) {
+ if (!is_ro) {
+ 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 (!is_ro && !sbi->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.");
+ inode = NULL;
+ 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 out;
+
+ err = ni_load_all_mi(ni);
+ if (err)
+ goto out;
+
+ sbi->mft.ni = ni;
+
+ /* 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.");
+ inode = NULL;
+ goto out;
+ }
+
+ ni = ntfs_i(inode);
+
+ for (i = 0; run_get_entry(&ni->file.run, i, &vcn, &lcn, &len); i++) {
+ if (lcn == SPARSE_LCN)
+ continue;
+
+ if (!sbi->bad_clusters)
+ ntfs_notice(sb, "Volume contains bad blocks");
+
+ sbi->bad_clusters += len;
+ }
+
+ iput(inode);
+
+ /* 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.");
+ inode = NULL;
+ goto out;
+ }
+
+ ni = ntfs_i(inode);
+
+#ifndef CONFIG_NTFS3_64BIT_CLUSTER
+ if (inode->i_size >> 32) {
+ err = -EINVAL;
+ goto out;
+ }
+#endif
+
+ /* Check bitmap boundary */
+ tt = sbi->used.bitmap.nbits;
+ if (inode->i_size < bitmap_size(tt)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ /* Not necessary */
+ sbi->used.bitmap.set_tail = true;
+ err = wnd_init(&sbi->used.bitmap, sbi->sb, tt);
+ if (err)
+ goto out;
+
+ iput(inode);
+
+ /* Compute the mft zone */
+ err = ntfs_refresh_zone(sbi);
+ if (err)
+ goto out;
+
+ /* Load $AttrDef */
+ ref.low = cpu_to_le32(MFT_REC_ATTR);
+ ref.seq = cpu_to_le16(MFT_REC_ATTR);
+ inode = ntfs_iget5(sbi->sb, &ref, &NAME_ATTRDEF);
+ if (IS_ERR(inode)) {
+ err = PTR_ERR(inode);
+ ntfs_err(sb, "Failed to load $AttrDef -> %d", err);
+ inode = NULL;
+ goto out;
+ }
+
+ if (inode->i_size < sizeof(struct ATTR_DEF_ENTRY)) {
+ err = -EINVAL;
+ goto out;
+ }
+ bytes = inode->i_size;
+ sbi->def_table = t = ntfs_malloc(bytes);
+ if (!t) {
+ err = -ENOMEM;
+ goto 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);
+ goto out;
+ }
+ memcpy(Add2Ptr(t, done), page_address(page),
+ min(PAGE_SIZE, tail));
+ ntfs_unmap_page(page);
+
+ if (!idx && ATTR_STD != t->type) {
+ err = -EINVAL;
+ goto 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 formater 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 \x24LogFile.");
+ inode = NULL;
+ goto out;
+ }
+
+ ni = ntfs_i(inode);
+
+ if (inode->i_size != 0x10000 * sizeof(short)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ sbi->upcase = upcase = ntfs_vmalloc(0x10000 * sizeof(short));
+ if (!upcase) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ for (idx = 0; idx < (0x10000 * sizeof(short) >> PAGE_SHIFT); idx++) {
+ const __le16 *src;
+ u16 *dst = Add2Ptr(upcase, idx << PAGE_SHIFT);
+ struct page *page = ntfs_map_page(inode->i_mapping, idx);
+
+ if (IS_ERR(page)) {
+ err = PTR_ERR(page);
+ goto 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(upcase, 0x10000 * sizeof(short));
+ if (shared && upcase != shared) {
+ sbi->upcase = shared;
+ ntfs_vfree(upcase);
+ }
+
+ iput(inode);
+ inode = NULL;
+
+ if (is_ntfs3(sbi)) {
+ /* Load $Secure */
+ err = ntfs_security_init(sbi);
+ if (err)
+ goto out;
+
+ /* Load $Extend */
+ err = ntfs_extend_init(sbi);
+ if (err)
+ goto load_root;
+
+ /* Load $Extend\$Reparse */
+ err = ntfs_reparse_init(sbi);
+ if (err)
+ goto load_root;
+
+ /* Load $Extend\$ObjId */
+ err = ntfs_objid_init(sbi);
+ if (err)
+ 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.");
+ inode = NULL;
+ goto out;
+ }
+
+ ni = ntfs_i(inode);
+
+ sb->s_root = d_make_root(inode);
+
+ if (!sb->s_root) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ return 0;
+
+out:
+ iput(inode);
+
+ if (sb->s_root) {
+ d_drop(sb->s_root);
+ sb->s_root = NULL;
+ }
+
+ 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, 0);
+
+ if (err == -EOPNOTSUPP)
+ sbi->flags |= NTFS_FLAGS_NODISCARD;
+
+ return err;
+}
+
+static struct dentry *ntfs_mount(struct file_system_type *fs_type, int flags,
+ const char *dev_name, void *data)
+{
+ return mount_bdev(fs_type, flags, dev_name, data, ntfs_fill_super);
+}
+
+// clang-format off
+static struct file_system_type ntfs_fs_type = {
+ .owner = THIS_MODULE,
+ .name = "ntfs3",
+ .mount = ntfs_mount,
+ .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_notice("ntfs3: Index binary search\n");
+ pr_notice("ntfs3: Hot fix free clusters\n");
+ pr_notice("ntfs3: Max link count %u\n", NTFS_LINK_MAX);
+
+#ifdef CONFIG_NTFS3_FS_POSIX_ACL
+ pr_notice("ntfs3: Enabled Linux POSIX ACLs support\n");
+#endif
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+ pr_notice("ntfs3: Activated 64 bits per cluster\n");
+#else
+ pr_notice("ntfs3: Activated 32 bits per cluster\n");
+#endif
+#ifdef CONFIG_NTFS3_LZX_XPRESS
+ pr_notice("ntfs3: Read-only lzx/xpress compression included\n");
+#endif
+
+ 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)
+{
+ if (ntfs_inode_cachep) {
+ 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");
+MODULE_INFO(behaviour, "Index binary search");
+MODULE_INFO(behaviour, "Hot fix free clusters");
+#ifdef CONFIG_NTFS3_FS_POSIX_ACL
+MODULE_INFO(behaviour, "Enabled Linux POSIX ACLs support");
+#endif
+#ifdef CONFIG_NTFS3_64BIT_CLUSTER
+MODULE_INFO(cluster, "Activated 64 bits per cluster");
+#else
+MODULE_INFO(cluster, "Activated 32 bits per cluster");
+#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);
