diff options
Diffstat (limited to 'fs/ntfs3/super.c')
| -rw-r--r-- | fs/ntfs3/super.c | 210 |
1 files changed, 125 insertions, 85 deletions
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index cef5467fd928..6a0f6b0a3ab2 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -90,7 +90,7 @@ void ntfs_printk(const struct super_block *sb, const char *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); + printk("%c%cntfs3(%s): %pV\n", KERN_SOH_ASCII, level, sb->s_id, &vaf); va_end(args); } @@ -124,10 +124,15 @@ void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) struct dentry *de = d_find_alias(inode); if (de) { + int len; spin_lock(&de->d_lock); - snprintf(name, sizeof(s_name_buf), " \"%s\"", - de->d_name.name); + len = snprintf(name, sizeof(s_name_buf), " \"%s\"", + de->d_name.name); spin_unlock(&de->d_lock); + if (len <= 0) + name[0] = 0; + else if (len >= sizeof(s_name_buf)) + name[sizeof(s_name_buf) - 1] = 0; } else { name[0] = 0; } @@ -140,7 +145,7 @@ void ntfs_inode_printk(struct inode *inode, const char *fmt, ...) vaf.fmt = printk_skip_level(fmt); vaf.va = &args; - printk("%c%cntfs3: %s: ino=%lx,%s %pV\n", KERN_SOH_ASCII, level, + 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); @@ -259,23 +264,23 @@ enum Opt { // 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), + fsparam_uid("uid", Opt_uid), + fsparam_gid("gid", Opt_gid), + fsparam_u32oct("umask", Opt_umask), + fsparam_u32oct("dmask", Opt_dmask), + fsparam_u32oct("fmask", Opt_fmask), + fsparam_flag("sys_immutable", Opt_immutable), + fsparam_flag("discard", Opt_discard), + fsparam_flag("force", Opt_force), + fsparam_flag("sparse", Opt_sparse), + fsparam_flag("nohidden", Opt_nohidden), + fsparam_flag("hide_dot_files", Opt_hide_dot_files), + fsparam_flag("windows_names", Opt_windows_names), + fsparam_flag("showmeta", Opt_showmeta), + fsparam_flag("acl", Opt_acl), + fsparam_string("iocharset", Opt_iocharset), + fsparam_flag("prealloc", Opt_prealloc), + fsparam_flag("nocase", Opt_nocase), {} }; // clang-format on @@ -319,14 +324,10 @@ static int ntfs_fs_parse_param(struct fs_context *fc, 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."); + opts->fs_uid = result.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."); + opts->fs_gid = result.gid; break; case Opt_umask: if (result.uint_32 & ~07777) @@ -349,28 +350,28 @@ static int ntfs_fs_parse_param(struct fs_context *fc, opts->fmask = 1; break; case Opt_immutable: - opts->sys_immutable = result.negated ? 0 : 1; + opts->sys_immutable = 1; break; case Opt_discard: - opts->discard = result.negated ? 0 : 1; + opts->discard = 1; break; case Opt_force: - opts->force = result.negated ? 0 : 1; + opts->force = 1; break; case Opt_sparse: - opts->sparse = result.negated ? 0 : 1; + opts->sparse = 1; break; case Opt_nohidden: - opts->nohidden = result.negated ? 1 : 0; + opts->nohidden = 1; break; case Opt_hide_dot_files: - opts->hide_dot_files = result.negated ? 0 : 1; + opts->hide_dot_files = 1; break; case Opt_windows_names: - opts->windows_names = result.negated ? 0 : 1; + opts->windows_names = 1; break; case Opt_showmeta: - opts->showmeta = result.negated ? 0 : 1; + opts->showmeta = 1; break; case Opt_acl: if (!result.negated) @@ -389,10 +390,10 @@ static int ntfs_fs_parse_param(struct fs_context *fc, param->string = NULL; break; case Opt_prealloc: - opts->prealloc = result.negated ? 0 : 1; + opts->prealloc = 1; break; case Opt_nocase: - opts->nocase = result.negated ? 1 : 0; + opts->nocase = 1; break; default: /* Should not be here unless we forget add case. */ @@ -408,6 +409,12 @@ static int ntfs_fs_reconfigure(struct fs_context *fc) struct ntfs_mount_options *new_opts = fc->fs_private; int ro_rw; + /* If ntfs3 is used as legacy ntfs enforce read-only mode. */ + if (is_legacy_ntfs(sb)) { + fc->sb_flags |= SB_RDONLY; + goto out; + } + ro_rw = sb_rdonly(sb) && !(fc->sb_flags & SB_RDONLY); if (ro_rw && (sbi->flags & NTFS_FLAGS_NEED_REPLAY)) { errorf(fc, @@ -427,8 +434,6 @@ static int ntfs_fs_reconfigure(struct fs_context *fc) 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, @@ -436,6 +441,8 @@ static int ntfs_fs_reconfigure(struct fs_context *fc) return -EINVAL; } +out: + sync_filesystem(sb); swap(sbi->options, fc->fs_private); return 0; @@ -462,7 +469,7 @@ 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", + 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, @@ -1157,7 +1164,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) CLST vcn, lcn, len; struct ATTRIB *attr; const struct VOLUME_INFO *info; - u32 idx, done, bytes; + u32 done, bytes; struct ATTR_DEF_ENTRY *t; u16 *shared; struct MFT_REF ref; @@ -1199,7 +1206,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) /* * Load $Volume. This should be done before $LogFile - * 'cause 'sbi->volume.ni' is used 'ntfs_set_state'. + * 'cause 'sbi->volume.ni' is used in 'ntfs_set_state'. */ ref.low = cpu_to_le32(MFT_REC_VOL); ref.seq = cpu_to_le16(MFT_REC_VOL); @@ -1341,7 +1348,7 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) /* Check bitmap boundary. */ tt = sbi->used.bitmap.nbits; - if (inode->i_size < bitmap_size(tt)) { + if (inode->i_size < ntfs3_bitmap_size(tt)) { ntfs_err(sb, "$Bitmap is corrupted."); err = -EINVAL; goto put_inode_out; @@ -1429,31 +1436,22 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) 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); + /* Read the entire file. */ + err = inode_read_data(inode, sbi->def_table, bytes); + if (err) { + ntfs_err(sb, "Failed to read $AttrDef (%d).", err); + goto put_inode_out; + } - 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; - } + if (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); @@ -1489,27 +1487,21 @@ static int ntfs_fill_super(struct super_block *sb, struct fs_context *fc) 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); + /* Read the entire file. */ + err = inode_read_data(inode, sbi->upcase, 0x10000 * sizeof(short)); + if (err) { + ntfs_err(sb, "Failed to read $UpCase (%d).", err); + goto put_inode_out; + } #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); + { + u16 *dst = sbi->upcase; + + for (i = 0; i < 0x10000; i++) + __swab16s(dst++); } +#endif shared = ntfs_set_shared(sbi->upcase, 0x10000 * sizeof(short)); if (shared && sbi->upcase != shared) { @@ -1613,6 +1605,8 @@ load_root: } #endif + if (is_legacy_ntfs(sb)) + sb->s_flags |= SB_RDONLY; return 0; put_inode_out: @@ -1730,7 +1724,7 @@ static const struct fs_context_operations ntfs_context_ops = { * 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) +static int __ntfs_init_fs_context(struct fs_context *fc) { struct ntfs_mount_options *opts; struct ntfs_sb_info *sbi; @@ -1778,6 +1772,11 @@ free_opts: return -ENOMEM; } +static int ntfs_init_fs_context(struct fs_context *fc) +{ + return __ntfs_init_fs_context(fc); +} + static void ntfs3_kill_sb(struct super_block *sb) { struct ntfs_sb_info *sbi = sb->s_fs_info; @@ -1798,14 +1797,54 @@ static struct file_system_type ntfs_fs_type = { .kill_sb = ntfs3_kill_sb, .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, }; + +#if IS_ENABLED(CONFIG_NTFS_FS) +static int ntfs_legacy_init_fs_context(struct fs_context *fc) +{ + int ret; + + ret = __ntfs_init_fs_context(fc); + /* If ntfs3 is used as legacy ntfs enforce read-only mode. */ + fc->sb_flags |= SB_RDONLY; + return ret; +} + +static struct file_system_type ntfs_legacy_fs_type = { + .owner = THIS_MODULE, + .name = "ntfs", + .init_fs_context = ntfs_legacy_init_fs_context, + .parameters = ntfs_fs_parameters, + .kill_sb = ntfs3_kill_sb, + .fs_flags = FS_REQUIRES_DEV | FS_ALLOW_IDMAP, +}; +MODULE_ALIAS_FS("ntfs"); + +static inline void register_as_ntfs_legacy(void) +{ + int err = register_filesystem(&ntfs_legacy_fs_type); + if (err) + pr_warn("ntfs3: Failed to register legacy ntfs filesystem driver: %d\n", err); +} + +static inline void unregister_as_ntfs_legacy(void) +{ + unregister_filesystem(&ntfs_legacy_fs_type); +} +bool is_legacy_ntfs(struct super_block *sb) +{ + return sb->s_type == &ntfs_legacy_fs_type; +} +#else +static inline void register_as_ntfs_legacy(void) {} +static inline void unregister_as_ntfs_legacy(void) {} +#endif + // 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)) @@ -1825,13 +1864,13 @@ static int __init init_ntfs_fs(void) ntfs_inode_cachep = kmem_cache_create( "ntfs_inode_cache", sizeof(struct ntfs_inode), 0, - (SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD | SLAB_ACCOUNT), - init_once); + (SLAB_RECLAIM_ACCOUNT | SLAB_ACCOUNT), init_once); if (!ntfs_inode_cachep) { err = -ENOMEM; goto out1; } + register_as_ntfs_legacy(); err = register_filesystem(&ntfs_fs_type); if (err) goto out; @@ -1849,6 +1888,7 @@ static void __exit exit_ntfs_fs(void) rcu_barrier(); kmem_cache_destroy(ntfs_inode_cachep); unregister_filesystem(&ntfs_fs_type); + unregister_as_ntfs_legacy(); ntfs3_exit_bitmap(); #ifdef CONFIG_PROC_FS |