| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Konstantin Komarov | 7462 | 86.94% | 33 | 47.14% |
| Kari Argillander | 902 | 10.51% | 17 | 24.29% |
| Christian Brauner | 58 | 0.68% | 1 | 1.43% |
| Christoph Hellwig | 53 | 0.62% | 6 | 8.57% |
| Daniel Pinto | 41 | 0.48% | 4 | 5.71% |
| Randy Dunlap | 26 | 0.30% | 1 | 1.43% |
| Pavel Skripkin | 18 | 0.21% | 1 | 1.43% |
| Colin Ian King | 5 | 0.06% | 2 | 2.86% |
| Amir Goldstein | 5 | 0.06% | 1 | 1.43% |
| Marc Aurèle La France | 4 | 0.05% | 1 | 1.43% |
| Song Muchun | 3 | 0.03% | 1 | 1.43% |
| edward lo | 3 | 0.03% | 1 | 1.43% |
| Shigeru Yoshida | 3 | 0.03% | 1 | 1.43% |
| Total | 8583 | 70 |
// 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 * * ntfs allows up to 2^64 clusters per volume. * It means you should use 64 bits lcn to operate with ntfs. * Implementation of ntfs.sys uses only 32 bits lcn. * Default ntfs3 uses 32 bits lcn too. * ntfs3 built with CONFIG_NTFS3_64BIT_CLUSTER (ntfs3_64) uses 64 bits per lcn. * * * ntfs limits, cluster size is 4K (2^12) * ----------------------------------------------------------------------------- * | Volume size | Clusters | ntfs.sys | ntfs3 | ntfs3_64 | mkntfs | chkdsk | * ----------------------------------------------------------------------------- * | < 16T, 2^44 | < 2^32 | yes | yes | yes | yes | yes | * | > 16T, 2^44 | > 2^32 | no | no | yes | yes | yes | * ----------------------------------------------------------|------------------ * * To mount large volumes as ntfs one should use large cluster size (up to 2M) * The maximum volume size in this case is 2^32 * 2^21 = 2^53 = 8P * * ntfs limits, cluster size is 2M (2^21) * ----------------------------------------------------------------------------- * | < 8P, 2^53 | < 2^32 | yes | yes | yes | yes | yes | * | > 8P, 2^53 | > 2^32 | no | no | yes | yes | yes | * ----------------------------------------------------------|------------------ * */ #include <linux/blkdev.h> #include <linux/buffer_head.h> #include <linux/exportfs.h> #include <linux/fs.h> #include <linux/fs_context.h> #include <linux/fs_parser.h> #include <linux/log2.h> #include <linux/minmax.h> #include <linux/module.h> #include <linux/nls.h> #include <linux/proc_fs.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 /* * ntfs_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'. /* * ntfs_inode_printk * * 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 formatter. * '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 * * Return: * * @ptr - If pointer was saved in shared memory. * * 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 * * Return: * * @ptr - If pointer is not shared anymore. * * 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 put_mount_options(struct ntfs_mount_options *options) { kfree(options->nls_name); unload_nls(options->nls); kfree(options); } enum Opt { Opt_uid, Opt_gid, Opt_umask, Opt_dmask, Opt_fmask, Opt_immutable, Opt_discard, Opt_force, Opt_sparse, Opt_nohidden, Opt_hide_dot_files, Opt_windows_names, Opt_showmeta, Opt_acl, Opt_iocharset, Opt_prealloc, Opt_nocase, Opt_err, }; // clang-format off static const struct fs_parameter_spec ntfs_fs_parameters[] = { fsparam_u32("uid", Opt_uid), fsparam_u32("gid", Opt_gid), fsparam_u32oct("umask", Opt_umask), fsparam_u32oct("dmask", Opt_dmask), fsparam_u32oct("fmask", Opt_fmask), fsparam_flag_no("sys_immutable", Opt_immutable), fsparam_flag_no("discard", Opt_discard), fsparam_flag_no("force", Opt_force), fsparam_flag_no("sparse", Opt_sparse), fsparam_flag_no("hidden", Opt_nohidden), fsparam_flag_no("hide_dot_files", Opt_hide_dot_files), fsparam_flag_no("windows_names", Opt_windows_names), fsparam_flag_no("showmeta", Opt_showmeta), fsparam_flag_no("acl", Opt_acl), fsparam_string("iocharset", Opt_iocharset), fsparam_flag_no("prealloc", Opt_prealloc), fsparam_flag_no("nocase", Opt_nocase), {} }; // clang-format on /* * Load nls table or if @nls is utf8 then return NULL. * * It is good idea to use here "const char *nls". * But load_nls accepts "char*". */ static struct nls_table *ntfs_load_nls(char *nls) { struct nls_table *ret; if (!nls) nls = CONFIG_NLS_DEFAULT; if (strcmp(nls, "utf8") == 0) return NULL; if (strcmp(nls, CONFIG_NLS_DEFAULT) == 0) return load_nls_default(); ret = load_nls(nls); if (ret) return ret; return ERR_PTR(-EINVAL); } static int ntfs_fs_parse_param(struct fs_context *fc, struct fs_parameter *param) { struct ntfs_mount_options *opts = fc->fs_private; struct fs_parse_result result; int opt; opt = fs_parse(fc, ntfs_fs_parameters, param, &result); if (opt < 0) return opt; switch (opt) { case Opt_uid: opts->fs_uid = make_kuid(current_user_ns(), result.uint_32); if (!uid_valid(opts->fs_uid)) return invalf(fc, "ntfs3: Invalid value for uid."); break; case Opt_gid: opts->fs_gid = make_kgid(current_user_ns(), result.uint_32); if (!gid_valid(opts->fs_gid)) return invalf(fc, "ntfs3: Invalid value for gid."); break; case Opt_umask: if (result.uint_32 & ~07777) return invalf(fc, "ntfs3: Invalid value for umask."); opts->fs_fmask_inv = ~result.uint_32; opts->fs_dmask_inv = ~result.uint_32; opts->fmask = 1; opts->dmask = 1; break; case Opt_dmask: if (result.uint_32 & ~07777) return invalf(fc, "ntfs3: Invalid value for dmask."); opts->fs_dmask_inv = ~result.uint_32; opts->dmask = 1; break; case Opt_fmask: if (result.uint_32 & ~07777) return invalf(fc, "ntfs3: Invalid value for fmask."); opts->fs_fmask_inv = ~result.uint_32; opts->fmask = 1; break; case Opt_immutable: opts->sys_immutable = result.negated ? 0 : 1; break; case Opt_discard: opts->discard = result.negated ? 0 : 1; break; case Opt_force: opts->force = result.negated ? 0 : 1; break; case Opt_sparse: opts->sparse = result.negated ? 0 : 1; break; case Opt_nohidden: opts->nohidden = result.negated ? 1 : 0; break; case Opt_hide_dot_files: opts->hide_dot_files = result.negated ? 0 : 1; break; case Opt_windows_names: opts->windows_names = result.negated ? 0 : 1; break; case Opt_showmeta: opts->showmeta = result.negated ? 0 : 1; break; case Opt_acl: if (!result.negated) #ifdef CONFIG_NTFS3_FS_POSIX_ACL fc->sb_flags |= SB_POSIXACL; #else return invalf( fc, "ntfs3: Support for ACL not compiled in!"); #endif else fc->sb_flags &= ~SB_POSIXACL; break; case Opt_iocharset: kfree(opts->nls_name); opts->nls_name = param->string; param->string = NULL; break; case Opt_prealloc: opts->prealloc = result.negated ? 0 : 1; break; case Opt_nocase: opts->nocase = result.negated ? 1 : 0; break; default: /* Should not be here unless we forget add case. */ return -EINVAL; } return 0; } static int ntfs_fs_reconfigure(struct fs_context *fc) { struct super_block *sb = fc->root->d_sb; struct ntfs_sb_info *sbi = sb->s_fs_info; struct ntfs_mount_options *new_opts = fc->fs_private; int ro_rw; ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY); if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { errorf(fc, "ntfs3: Couldn't remount rw because journal is not replayed. Please umount/remount instead\n"); return -EINVAL; } new_opts->nls = ntfs_load_nls(new_opts->nls_name); if (IS_ERR(new_opts->nls)) { new_opts->nls = NULL; errorf(fc, "ntfs3: Cannot load iocharset %s", new_opts->nls_name); return -EINVAL; } if (new_opts->nls != sbi->options->nls) return invalf( fc, "ntfs3: Cannot use different iocharset when remounting!"); sync_filesystem(sb); if (ro_rw && (sbi->volume.flags & VOLUME_FLAG_DIRTY) && !new_opts->force) { errorf(fc, "ntfs3: Volume is dirty and \"force\" flag is not set!"); return -EINVAL; } swap(sbi->options, fc->fs_private); return 0; } #ifdef CONFIG_PROC_FS static struct proc_dir_entry *proc_info_root; /* * ntfs3_volinfo: * * The content of /proc/fs/ntfs3/<dev>/volinfo * * ntfs3.1 * cluster size * number of clusters * total number of mft records * number of used mft records ~= number of files + folders * real state of ntfs "dirty"/"clean" * current state of ntfs "dirty"/"clean" */ static int ntfs3_volinfo(struct seq_file *m, void *o) { struct super_block *sb = m->private; struct ntfs_sb_info *sbi = sb->s_fs_info; seq_printf(m, "ntfs%d.%d\n%u\n%zu\n\%zu\n%zu\n%s\n%s\n", sbi->volume.major_ver, sbi->volume.minor_ver, sbi->cluster_size, sbi->used.bitmap.nbits, sbi->mft.bitmap.nbits, sbi->mft.bitmap.nbits - wnd_zeroes(&sbi->mft.bitmap), sbi->volume.real_dirty ? "dirty" : "clean", (sbi->volume.flags & VOLUME_FLAG_DIRTY) ? "dirty" : "clean"); return 0; } static int ntfs3_volinfo_open(struct inode *inode, struct file *file) { return single_open(file, ntfs3_volinfo, pde_data(inode)); } /* read /proc/fs/ntfs3/<dev>/label */ static int ntfs3_label_show(struct seq_file *m, void *o) { struct super_block *sb = m->private; struct ntfs_sb_info *sbi = sb->s_fs_info; seq_printf(m, "%s\n", sbi->volume.label); return 0; } /* write /proc/fs/ntfs3/<dev>/label */ static ssize_t ntfs3_label_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) { int err; struct super_block *sb = pde_data(file_inode(file)); ssize_t ret = count; u8 *label; if (sb_rdonly(sb)) return -EROFS; label = kmalloc(count, GFP_NOFS); if (!label) return -ENOMEM; if (copy_from_user(label, buffer, ret)) { ret = -EFAULT; goto out; } while (ret > 0 && label[ret - 1] == '\n') ret -= 1; err = ntfs_set_label(sb->s_fs_info, label, ret); if (err < 0) { ntfs_err(sb, "failed (%d) to write label", err); ret = err; goto out; } *ppos += count; ret = count; out: kfree(label); return ret; } static int ntfs3_label_open(struct inode *inode, struct file *file) { return single_open(file, ntfs3_label_show, pde_data(inode)); } static const struct proc_ops ntfs3_volinfo_fops = { .proc_read = seq_read, .proc_lseek = seq_lseek, .proc_release = single_release, .proc_open = ntfs3_volinfo_open, }; static const struct proc_ops ntfs3_label_fops = { .proc_read = seq_read, .proc_lseek = seq_lseek, .proc_release = single_release, .proc_open = ntfs3_label_open, .proc_write = ntfs3_label_write, }; #endif static struct kmem_cache *ntfs_inode_cachep; static struct inode *ntfs_alloc_inode(struct super_block *sb) { struct ntfs_inode *ni = alloc_inode_sb(sb, 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_free_inode(struct inode *inode) { struct ntfs_inode *ni = ntfs_i(inode); mutex_destroy(&ni->ni_lock); kmem_cache_free(ntfs_inode_cachep, ni); } 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 ntfs3_put_sbi(struct ntfs_sb_info *sbi) { wnd_close(&sbi->mft.bitmap); wnd_close(&sbi->used.bitmap); if (sbi->mft.ni) { iput(&sbi->mft.ni->vfs_inode); sbi->mft.ni = NULL; } if (sbi->security.ni) { iput(&sbi->security.ni->vfs_inode); sbi->security.ni = NULL; } if (sbi->reparse.ni) { iput(&sbi->reparse.ni->vfs_inode); sbi->reparse.ni = NULL; } if (sbi->objid.ni) { iput(&sbi->objid.ni->vfs_inode); sbi->objid.ni = NULL; } if (sbi->volume.ni) { iput(&sbi->volume.ni->vfs_inode); sbi->volume.ni = NULL; } 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); } static void ntfs3_free_sbi(struct ntfs_sb_info *sbi) { kfree(sbi->new_rec); kvfree(ntfs_put_shared(sbi->upcase)); kfree(sbi->def_table); 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; #ifdef CONFIG_PROC_FS // Remove /proc/fs/ntfs3/.. if (sbi->procdir) { remove_proc_entry("label", sbi->procdir); remove_proc_entry("volinfo", sbi->procdir); remove_proc_entry(sb->s_id, proc_info_root); sbi->procdir = NULL; } #endif /* Mark rw ntfs as clear, if possible. */ ntfs_set_state(sbi, NTFS_DIRTY_CLEAR); ntfs3_put_sbi(sbi); } 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 = { .encode_fh = generic_encode_ino32_fh, .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. * * NTFS mount begins from boot - special formatted 512 bytes. * There are two boots: the first and the last 512 bytes of volume. * The content of boot is not changed during ntfs life. * * NOTE: ntfs.sys checks only first (primary) boot. * chkdsk checks both boots. */ static int ntfs_init_from_boot(struct super_block *sb, u32 sector_size, u64 dev_size, struct NTFS_BOOT **boot2) { 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, dev_size0; struct NTFS_BOOT *boot; struct buffer_head *bh; struct MFT_REC *rec; u16 fn, ao; u8 cluster_bits; u32 boot_off = 0; const char *hint = "Primary boot"; /* Save original dev_size. Used with alternative boot. */ dev_size0 = dev_size; sbi->volume.blocks = dev_size >> PAGE_SHIFT; bh = ntfs_bread(sb, 0); if (!bh) return -EIO; check_boot: err = -EINVAL; /* Corrupted image; do not read OOB */ if (bh->b_size - sizeof(*boot) < boot_off) goto out; boot = (struct NTFS_BOOT *)Add2Ptr(bh->b_data, boot_off); if (memcmp(boot->system_id, "NTFS ", sizeof("NTFS ") - 1)) { ntfs_err(sb, "%s signature is not NTFS.", hint); 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, "%s: invalid bytes per sector %u.", hint, 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, "%s: invalid sectors per cluster %u.", hint, 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, "%s: start of MFT 0x%llx (0x%llx) is out of volume 0x%llx.", hint, mlcn, mlcn2, sectors); goto out; } if (boot->record_size >= 0) { record_size = (u32)boot->record_size << cluster_bits; } else if (-boot->record_size <= MAXIMUM_SHIFT_BYTES_PER_MFT) { record_size = 1u << (-boot->record_size); } else { ntfs_err(sb, "%s: invalid record size %d.", hint, boot->record_size); goto out; } sbi->record_size = record_size; 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, "%s: invalid bytes per MFT record %u (%d).", hint, 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; } if (boot->index_size >= 0) { sbi->index_size = (u32)boot->index_size << cluster_bits; } else if (-boot->index_size <= MAXIMUM_SHIFT_BYTES_PER_INDEX) { sbi->index_size = 1u << (-boot->index_size); } else { ntfs_err(sb, "%s: invalid index size %d.", hint, boot->index_size); goto out; } /* Check index record size. */ if (sbi->index_size < SECTOR_SIZE || !is_power_of_2(sbi->index_size)) { ntfs_err(sb, "%s: invalid bytes per index %u(%d).", hint, sbi->index_size, boot->index_size); goto out; } if (sbi->index_size > MAXIMUM_BYTES_PER_INDEX) { ntfs_err(sb, "%s: unsupported bytes per index %u.", hint, 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, "%s: invalid bytes per cluster (%u).", hint, 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, 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); fn = (sbi->record_size >> SECTOR_SHIFT) + 1; rec->rhdr.fix_num = cpu_to_le16(fn); ao = ALIGN(MFTRECORD_FIXUP_OFFSET + 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; if (bh->b_blocknr && !sb_rdonly(sb)) { /* * Alternative boot is ok but primary is not ok. * Do not update primary boot here 'cause it may be faked boot. * Let ntfs to be mounted and update boot later. */ *boot2 = kmemdup(boot, sizeof(*boot), GFP_NOFS | __GFP_NOWARN); } out: if (err == -EINVAL && !bh->b_blocknr && dev_size0 > PAGE_SHIFT) { u32 block_size = min_t(u32, sector_size, PAGE_SIZE); u64 lbo = dev_size0 - sizeof(*boot); /* * Try alternative boot (last sector) */ brelse(bh); sb_set_blocksize(sb, block_size); bh = ntfs_bread(sb, lbo >> blksize_bits(block_size)); if (!bh) return -EINVAL; boot_off = lbo & (block_size - 1); hint = "Alternative boot"; dev_size = dev_size0; /* restore original size. */ goto check_boot; } 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; bool ro = sb_rdonly(sb); struct NTFS_BOOT *boot2 = NULL; 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), &boot2); 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; if (info->flags & VOLUME_FLAG_DIRTY) { sbi->volume.real_dirty = true; ntfs_info(sb, "It is recommened to use chkdsk."); } /* 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) && !ro) { ntfs_warn(sb, "failed to replay log file. Can't mount rw!"); err = -EINVAL; goto out; } if ((sbi->volume.flags & VOLUME_FLAG_DIRTY) && !ro && !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 (ro) 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 = kvmalloc(bytes, GFP_KERNEL); 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; } if (boot2) { /* * Alternative boot is ok but primary is not ok. * Volume is recognized as NTFS. Update primary boot. */ struct buffer_head *bh0 = sb_getblk(sb, 0); if (bh0) { if (buffer_locked(bh0)) __wait_on_buffer(bh0); lock_buffer(bh0); memcpy(bh0->b_data, boot2, sizeof(*boot2)); set_buffer_uptodate(bh0); mark_buffer_dirty(bh0); unlock_buffer(bh0); if (!sync_dirty_buffer(bh0)) ntfs_warn(sb, "primary boot is updated"); put_bh(bh0); } kfree(boot2); } #ifdef CONFIG_PROC_FS /* Create /proc/fs/ntfs3/.. */ if (proc_info_root) { struct proc_dir_entry *e = proc_mkdir(sb->s_id, proc_info_root); static_assert((S_IRUGO | S_IWUSR) == 0644); if (e) { proc_create_data("volinfo", S_IRUGO, e, &ntfs3_volinfo_fops, sb); proc_create_data("label", S_IRUGO | S_IWUSR, e, &ntfs3_label_fops, sb); sbi->procdir = e; } } #endif return 0; put_inode_out: iput(inode); out: ntfs3_put_sbi(sbi); kfree(boot2); ntfs3_put_sbi(sbi); 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) { ntfs3_put_sbi(sbi); ntfs3_free_sbi(sbi); } if (opts) put_mount_options(opts); } // clang-format off 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, }; // clang-format on /* * 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; } static void ntfs3_kill_sb(struct super_block *sb) { struct ntfs_sb_info *sbi = sb->s_fs_info; kill_block_super(sb); if (sbi->options) put_mount_options(sbi->options); ntfs3_free_sbi(sbi); } // 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 = ntfs3_kill_sb, .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"); #ifdef CONFIG_PROC_FS /* Create "/proc/fs/ntfs3" */ proc_info_root = proc_mkdir("fs/ntfs3", NULL); #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) { rcu_barrier(); kmem_cache_destroy(ntfs_inode_cachep); unregister_filesystem(&ntfs_fs_type); ntfs3_exit_bitmap(); #ifdef CONFIG_PROC_FS if (proc_info_root) remove_proc_entry("fs/ntfs3", NULL); #endif } 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);
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