1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/ioctl.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp */ 9ac27a0ecSDave Kleikamp 10ac27a0ecSDave Kleikamp #include <linux/fs.h> 11ac27a0ecSDave Kleikamp #include <linux/capability.h> 12ac27a0ecSDave Kleikamp #include <linux/time.h> 13ac27a0ecSDave Kleikamp #include <linux/compat.h> 1442a74f20SDave Hansen #include <linux/mount.h> 15748de673SAkira Fujita #include <linux/file.h> 169bd8212fSMichael Halcrow #include <linux/random.h> 17ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 183dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 193dcf5451SChristoph Hellwig #include "ext4.h" 20ac27a0ecSDave Kleikamp 2119c5246dSYongqiang Yang #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) 2219c5246dSYongqiang Yang 23393d1d1dSDr. Tilmann Bubeck /** 24393d1d1dSDr. Tilmann Bubeck * Swap memory between @a and @b for @len bytes. 25393d1d1dSDr. Tilmann Bubeck * 26393d1d1dSDr. Tilmann Bubeck * @a: pointer to first memory area 27393d1d1dSDr. Tilmann Bubeck * @b: pointer to second memory area 28393d1d1dSDr. Tilmann Bubeck * @len: number of bytes to swap 29393d1d1dSDr. Tilmann Bubeck * 30393d1d1dSDr. Tilmann Bubeck */ 31393d1d1dSDr. Tilmann Bubeck static void memswap(void *a, void *b, size_t len) 32393d1d1dSDr. Tilmann Bubeck { 33393d1d1dSDr. Tilmann Bubeck unsigned char *ap, *bp; 34393d1d1dSDr. Tilmann Bubeck unsigned char tmp; 35393d1d1dSDr. Tilmann Bubeck 36393d1d1dSDr. Tilmann Bubeck ap = (unsigned char *)a; 37393d1d1dSDr. Tilmann Bubeck bp = (unsigned char *)b; 38393d1d1dSDr. Tilmann Bubeck while (len-- > 0) { 39393d1d1dSDr. Tilmann Bubeck tmp = *ap; 40393d1d1dSDr. Tilmann Bubeck *ap = *bp; 41393d1d1dSDr. Tilmann Bubeck *bp = tmp; 42393d1d1dSDr. Tilmann Bubeck ap++; 43393d1d1dSDr. Tilmann Bubeck bp++; 44393d1d1dSDr. Tilmann Bubeck } 45393d1d1dSDr. Tilmann Bubeck } 46393d1d1dSDr. Tilmann Bubeck 47393d1d1dSDr. Tilmann Bubeck /** 48393d1d1dSDr. Tilmann Bubeck * Swap i_data and associated attributes between @inode1 and @inode2. 49393d1d1dSDr. Tilmann Bubeck * This function is used for the primary swap between inode1 and inode2 50393d1d1dSDr. Tilmann Bubeck * and also to revert this primary swap in case of errors. 51393d1d1dSDr. Tilmann Bubeck * 52393d1d1dSDr. Tilmann Bubeck * Therefore you have to make sure, that calling this method twice 53393d1d1dSDr. Tilmann Bubeck * will revert all changes. 54393d1d1dSDr. Tilmann Bubeck * 55393d1d1dSDr. Tilmann Bubeck * @inode1: pointer to first inode 56393d1d1dSDr. Tilmann Bubeck * @inode2: pointer to second inode 57393d1d1dSDr. Tilmann Bubeck */ 58393d1d1dSDr. Tilmann Bubeck static void swap_inode_data(struct inode *inode1, struct inode *inode2) 59393d1d1dSDr. Tilmann Bubeck { 60393d1d1dSDr. Tilmann Bubeck loff_t isize; 61393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei1; 62393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei2; 63393d1d1dSDr. Tilmann Bubeck 64393d1d1dSDr. Tilmann Bubeck ei1 = EXT4_I(inode1); 65393d1d1dSDr. Tilmann Bubeck ei2 = EXT4_I(inode2); 66393d1d1dSDr. Tilmann Bubeck 67393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); 68393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_version, &inode2->i_version, 69393d1d1dSDr. Tilmann Bubeck sizeof(inode1->i_version)); 70393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_blocks, &inode2->i_blocks, 71393d1d1dSDr. Tilmann Bubeck sizeof(inode1->i_blocks)); 72393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); 73393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); 74393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); 75393d1d1dSDr. Tilmann Bubeck 76393d1d1dSDr. Tilmann Bubeck memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); 77393d1d1dSDr. Tilmann Bubeck memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); 78393d1d1dSDr. Tilmann Bubeck memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); 79cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); 80cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); 81393d1d1dSDr. Tilmann Bubeck 82393d1d1dSDr. Tilmann Bubeck isize = i_size_read(inode1); 83393d1d1dSDr. Tilmann Bubeck i_size_write(inode1, i_size_read(inode2)); 84393d1d1dSDr. Tilmann Bubeck i_size_write(inode2, isize); 85393d1d1dSDr. Tilmann Bubeck } 86393d1d1dSDr. Tilmann Bubeck 87393d1d1dSDr. Tilmann Bubeck /** 88393d1d1dSDr. Tilmann Bubeck * Swap the information from the given @inode and the inode 89393d1d1dSDr. Tilmann Bubeck * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 90393d1d1dSDr. Tilmann Bubeck * important fields of the inodes. 91393d1d1dSDr. Tilmann Bubeck * 92393d1d1dSDr. Tilmann Bubeck * @sb: the super block of the filesystem 93393d1d1dSDr. Tilmann Bubeck * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 94393d1d1dSDr. Tilmann Bubeck * 95393d1d1dSDr. Tilmann Bubeck */ 96393d1d1dSDr. Tilmann Bubeck static long swap_inode_boot_loader(struct super_block *sb, 97393d1d1dSDr. Tilmann Bubeck struct inode *inode) 98393d1d1dSDr. Tilmann Bubeck { 99393d1d1dSDr. Tilmann Bubeck handle_t *handle; 100393d1d1dSDr. Tilmann Bubeck int err; 101393d1d1dSDr. Tilmann Bubeck struct inode *inode_bl; 102393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei_bl; 103d7092ae2Sjon ernst struct ext4_sb_info *sbi = EXT4_SB(sb); 104393d1d1dSDr. Tilmann Bubeck 105d8558a29STheodore Ts'o if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) 106d8558a29STheodore Ts'o return -EINVAL; 107393d1d1dSDr. Tilmann Bubeck 108d8558a29STheodore Ts'o if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) 109d8558a29STheodore Ts'o return -EPERM; 110393d1d1dSDr. Tilmann Bubeck 111393d1d1dSDr. Tilmann Bubeck inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); 112d8558a29STheodore Ts'o if (IS_ERR(inode_bl)) 113d8558a29STheodore Ts'o return PTR_ERR(inode_bl); 114393d1d1dSDr. Tilmann Bubeck ei_bl = EXT4_I(inode_bl); 115393d1d1dSDr. Tilmann Bubeck 116393d1d1dSDr. Tilmann Bubeck filemap_flush(inode->i_mapping); 117393d1d1dSDr. Tilmann Bubeck filemap_flush(inode_bl->i_mapping); 118393d1d1dSDr. Tilmann Bubeck 119393d1d1dSDr. Tilmann Bubeck /* Protect orig inodes against a truncate and make sure, 120393d1d1dSDr. Tilmann Bubeck * that only 1 swap_inode_boot_loader is running. */ 121375e289eSJ. Bruce Fields lock_two_nondirectories(inode, inode_bl); 122393d1d1dSDr. Tilmann Bubeck 123393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode->i_data, 0); 124393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode_bl->i_data, 0); 125393d1d1dSDr. Tilmann Bubeck 126393d1d1dSDr. Tilmann Bubeck /* Wait for all existing dio workers */ 127393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode); 128393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode_bl); 129393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode); 130393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode_bl); 131393d1d1dSDr. Tilmann Bubeck 132393d1d1dSDr. Tilmann Bubeck handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 133393d1d1dSDr. Tilmann Bubeck if (IS_ERR(handle)) { 134393d1d1dSDr. Tilmann Bubeck err = -EINVAL; 13530d29b11SZheng Liu goto journal_err_out; 136393d1d1dSDr. Tilmann Bubeck } 137393d1d1dSDr. Tilmann Bubeck 138393d1d1dSDr. Tilmann Bubeck /* Protect extent tree against block allocations via delalloc */ 139393d1d1dSDr. Tilmann Bubeck ext4_double_down_write_data_sem(inode, inode_bl); 140393d1d1dSDr. Tilmann Bubeck 141393d1d1dSDr. Tilmann Bubeck if (inode_bl->i_nlink == 0) { 142393d1d1dSDr. Tilmann Bubeck /* this inode has never been used as a BOOT_LOADER */ 143393d1d1dSDr. Tilmann Bubeck set_nlink(inode_bl, 1); 144393d1d1dSDr. Tilmann Bubeck i_uid_write(inode_bl, 0); 145393d1d1dSDr. Tilmann Bubeck i_gid_write(inode_bl, 0); 146393d1d1dSDr. Tilmann Bubeck inode_bl->i_flags = 0; 147393d1d1dSDr. Tilmann Bubeck ei_bl->i_flags = 0; 148393d1d1dSDr. Tilmann Bubeck inode_bl->i_version = 1; 149393d1d1dSDr. Tilmann Bubeck i_size_write(inode_bl, 0); 150393d1d1dSDr. Tilmann Bubeck inode_bl->i_mode = S_IFREG; 151393d1d1dSDr. Tilmann Bubeck if (EXT4_HAS_INCOMPAT_FEATURE(sb, 152393d1d1dSDr. Tilmann Bubeck EXT4_FEATURE_INCOMPAT_EXTENTS)) { 153393d1d1dSDr. Tilmann Bubeck ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 154393d1d1dSDr. Tilmann Bubeck ext4_ext_tree_init(handle, inode_bl); 155393d1d1dSDr. Tilmann Bubeck } else 156393d1d1dSDr. Tilmann Bubeck memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 157393d1d1dSDr. Tilmann Bubeck } 158393d1d1dSDr. Tilmann Bubeck 159393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 160393d1d1dSDr. Tilmann Bubeck 161393d1d1dSDr. Tilmann Bubeck inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); 162393d1d1dSDr. Tilmann Bubeck 163393d1d1dSDr. Tilmann Bubeck spin_lock(&sbi->s_next_gen_lock); 164393d1d1dSDr. Tilmann Bubeck inode->i_generation = sbi->s_next_generation++; 165393d1d1dSDr. Tilmann Bubeck inode_bl->i_generation = sbi->s_next_generation++; 166393d1d1dSDr. Tilmann Bubeck spin_unlock(&sbi->s_next_gen_lock); 167393d1d1dSDr. Tilmann Bubeck 168393d1d1dSDr. Tilmann Bubeck ext4_discard_preallocations(inode); 169393d1d1dSDr. Tilmann Bubeck 170393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode); 171393d1d1dSDr. Tilmann Bubeck if (err < 0) { 172393d1d1dSDr. Tilmann Bubeck ext4_warning(inode->i_sb, 173393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 174393d1d1dSDr. Tilmann Bubeck inode->i_ino, err); 175393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 176393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 177393d1d1dSDr. Tilmann Bubeck } else { 178393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode_bl); 179393d1d1dSDr. Tilmann Bubeck if (err < 0) { 180393d1d1dSDr. Tilmann Bubeck ext4_warning(inode_bl->i_sb, 181393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 182393d1d1dSDr. Tilmann Bubeck inode_bl->i_ino, err); 183393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 184393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 185393d1d1dSDr. Tilmann Bubeck ext4_mark_inode_dirty(handle, inode); 186393d1d1dSDr. Tilmann Bubeck } 187393d1d1dSDr. Tilmann Bubeck } 188393d1d1dSDr. Tilmann Bubeck ext4_journal_stop(handle); 189393d1d1dSDr. Tilmann Bubeck ext4_double_up_write_data_sem(inode, inode_bl); 190393d1d1dSDr. Tilmann Bubeck 19130d29b11SZheng Liu journal_err_out: 192393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode); 193393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode_bl); 194375e289eSJ. Bruce Fields unlock_two_nondirectories(inode, inode_bl); 195393d1d1dSDr. Tilmann Bubeck iput(inode_bl); 196393d1d1dSDr. Tilmann Bubeck return err; 197393d1d1dSDr. Tilmann Bubeck } 198393d1d1dSDr. Tilmann Bubeck 1999bd8212fSMichael Halcrow static int uuid_is_zero(__u8 u[16]) 2009bd8212fSMichael Halcrow { 2019bd8212fSMichael Halcrow int i; 2029bd8212fSMichael Halcrow 2039bd8212fSMichael Halcrow for (i = 0; i < 16; i++) 2049bd8212fSMichael Halcrow if (u[i]) 2059bd8212fSMichael Halcrow return 0; 2069bd8212fSMichael Halcrow return 1; 2079bd8212fSMichael Halcrow } 2089bd8212fSMichael Halcrow 2095cdd7b2dSAndi Kleen long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 210ac27a0ecSDave Kleikamp { 211496ad9aaSAl Viro struct inode *inode = file_inode(filp); 212bab08ab9STheodore Ts'o struct super_block *sb = inode->i_sb; 213617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 214ac27a0ecSDave Kleikamp unsigned int flags; 215ac27a0ecSDave Kleikamp 216617ba13bSMingming Cao ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 217ac27a0ecSDave Kleikamp 218ac27a0ecSDave Kleikamp switch (cmd) { 219617ba13bSMingming Cao case EXT4_IOC_GETFLAGS: 220ff9ddf7eSJan Kara ext4_get_inode_flags(ei); 221617ba13bSMingming Cao flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 222ac27a0ecSDave Kleikamp return put_user(flags, (int __user *) arg); 223617ba13bSMingming Cao case EXT4_IOC_SETFLAGS: { 224ac27a0ecSDave Kleikamp handle_t *handle = NULL; 2254db46fc2SAneesh Kumar K.V int err, migrate = 0; 226617ba13bSMingming Cao struct ext4_iloc iloc; 22779906964STheodore Ts'o unsigned int oldflags, mask, i; 228ac27a0ecSDave Kleikamp unsigned int jflag; 229ac27a0ecSDave Kleikamp 2302e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 231ac27a0ecSDave Kleikamp return -EACCES; 232ac27a0ecSDave Kleikamp 233ac27a0ecSDave Kleikamp if (get_user(flags, (int __user *) arg)) 234ac27a0ecSDave Kleikamp return -EFAULT; 235ac27a0ecSDave Kleikamp 236a561be71SAl Viro err = mnt_want_write_file(filp); 23742a74f20SDave Hansen if (err) 23842a74f20SDave Hansen return err; 23942a74f20SDave Hansen 2402dc6b0d4SDuane Griffin flags = ext4_mask_flags(inode->i_mode, flags); 241ac27a0ecSDave Kleikamp 24242a74f20SDave Hansen err = -EPERM; 243ac27a0ecSDave Kleikamp mutex_lock(&inode->i_mutex); 244e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 24542a74f20SDave Hansen if (IS_NOQUOTA(inode)) 24642a74f20SDave Hansen goto flags_out; 24742a74f20SDave Hansen 248ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 249ac27a0ecSDave Kleikamp 250ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 251617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 252ac27a0ecSDave Kleikamp 253ac27a0ecSDave Kleikamp /* 254ac27a0ecSDave Kleikamp * The IMMUTABLE and APPEND_ONLY flags can only be changed by 255ac27a0ecSDave Kleikamp * the relevant capability. 256ac27a0ecSDave Kleikamp * 257ac27a0ecSDave Kleikamp * This test looks nicer. Thanks to Pauline Middelink 258ac27a0ecSDave Kleikamp */ 259617ba13bSMingming Cao if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 26042a74f20SDave Hansen if (!capable(CAP_LINUX_IMMUTABLE)) 26142a74f20SDave Hansen goto flags_out; 262ac27a0ecSDave Kleikamp } 263ac27a0ecSDave Kleikamp 264ac27a0ecSDave Kleikamp /* 265ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 266ac27a0ecSDave Kleikamp * the relevant capability. 267ac27a0ecSDave Kleikamp */ 268617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 26942a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 27042a74f20SDave Hansen goto flags_out; 271ac27a0ecSDave Kleikamp } 272996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 2734db46fc2SAneesh Kumar K.V migrate = 1; 274ac27a0ecSDave Kleikamp 275c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 276c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 277c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 278c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 279c8d46e41SJiaying Zhang goto flags_out; 280c8d46e41SJiaying Zhang } 281c8d46e41SJiaying Zhang } else if (oldflags & EXT4_EOFBLOCKS_FL) 282c8d46e41SJiaying Zhang ext4_truncate(inode); 283c8d46e41SJiaying Zhang 2849924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 285ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 28642a74f20SDave Hansen err = PTR_ERR(handle); 28742a74f20SDave Hansen goto flags_out; 288ac27a0ecSDave Kleikamp } 289ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 2900390131bSFrank Mayhar ext4_handle_sync(handle); 291617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 292ac27a0ecSDave Kleikamp if (err) 293ac27a0ecSDave Kleikamp goto flags_err; 294ac27a0ecSDave Kleikamp 29579906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 29679906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 29779906964STheodore Ts'o continue; 29879906964STheodore Ts'o if (mask & flags) 29979906964STheodore Ts'o ext4_set_inode_flag(inode, i); 30079906964STheodore Ts'o else 30179906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 30279906964STheodore Ts'o } 303ac27a0ecSDave Kleikamp 304617ba13bSMingming Cao ext4_set_inode_flags(inode); 305ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 306ac27a0ecSDave Kleikamp 307617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 308ac27a0ecSDave Kleikamp flags_err: 309617ba13bSMingming Cao ext4_journal_stop(handle); 31042a74f20SDave Hansen if (err) 31142a74f20SDave Hansen goto flags_out; 312ac27a0ecSDave Kleikamp 313617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 314617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 3154db46fc2SAneesh Kumar K.V if (err) 3164db46fc2SAneesh Kumar K.V goto flags_out; 317996bb9fdSTheodore Ts'o if (migrate) { 318996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 3194db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 320996bb9fdSTheodore Ts'o else 321996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 322996bb9fdSTheodore Ts'o } 323996bb9fdSTheodore Ts'o 32442a74f20SDave Hansen flags_out: 325ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3262a79f17eSAl Viro mnt_drop_write_file(filp); 327ac27a0ecSDave Kleikamp return err; 328ac27a0ecSDave Kleikamp } 329617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 330617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 331ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 332617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 333617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 334ac27a0ecSDave Kleikamp handle_t *handle; 335617ba13bSMingming Cao struct ext4_iloc iloc; 336ac27a0ecSDave Kleikamp __u32 generation; 337ac27a0ecSDave Kleikamp int err; 338ac27a0ecSDave Kleikamp 3392e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 340ac27a0ecSDave Kleikamp return -EPERM; 34142a74f20SDave Hansen 3429aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 343814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 344814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 345814525f4SDarrick J. Wong return -ENOTTY; 346814525f4SDarrick J. Wong } 347814525f4SDarrick J. Wong 348a561be71SAl Viro err = mnt_want_write_file(filp); 34942a74f20SDave Hansen if (err) 35042a74f20SDave Hansen return err; 35142a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 35242a74f20SDave Hansen err = -EFAULT; 35342a74f20SDave Hansen goto setversion_out; 35442a74f20SDave Hansen } 355ac27a0ecSDave Kleikamp 3566c2155b9SDjalal Harouni mutex_lock(&inode->i_mutex); 3579924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 35842a74f20SDave Hansen if (IS_ERR(handle)) { 35942a74f20SDave Hansen err = PTR_ERR(handle); 3606c2155b9SDjalal Harouni goto unlock_out; 36142a74f20SDave Hansen } 362617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 363ac27a0ecSDave Kleikamp if (err == 0) { 364ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 365ac27a0ecSDave Kleikamp inode->i_generation = generation; 366617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 367ac27a0ecSDave Kleikamp } 368617ba13bSMingming Cao ext4_journal_stop(handle); 3696c2155b9SDjalal Harouni 3706c2155b9SDjalal Harouni unlock_out: 3716c2155b9SDjalal Harouni mutex_unlock(&inode->i_mutex); 37242a74f20SDave Hansen setversion_out: 3732a79f17eSAl Viro mnt_drop_write_file(filp); 374ac27a0ecSDave Kleikamp return err; 375ac27a0ecSDave Kleikamp } 376617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 377617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 378ac046f1dSPeng Tao int err, err2=0; 379ac27a0ecSDave Kleikamp 3808f82f840SYongqiang Yang err = ext4_resize_begin(sb); 3818f82f840SYongqiang Yang if (err) 3828f82f840SYongqiang Yang return err; 383ac27a0ecSDave Kleikamp 384014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 385014a1770SDjalal Harouni err = -EFAULT; 386014a1770SDjalal Harouni goto group_extend_out; 387014a1770SDjalal Harouni } 388ac27a0ecSDave Kleikamp 389bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 390bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 391bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 392bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 393014a1770SDjalal Harouni err = -EOPNOTSUPP; 394014a1770SDjalal Harouni goto group_extend_out; 395bab08ab9STheodore Ts'o } 396bab08ab9STheodore Ts'o 397a561be71SAl Viro err = mnt_want_write_file(filp); 39842a74f20SDave Hansen if (err) 399014a1770SDjalal Harouni goto group_extend_out; 40042a74f20SDave Hansen 401617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 402ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 403dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 4047ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 405dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 406ac046f1dSPeng Tao } 4077ffe1ea8SHidehiro Kawai if (err == 0) 4087ffe1ea8SHidehiro Kawai err = err2; 4092a79f17eSAl Viro mnt_drop_write_file(filp); 410014a1770SDjalal Harouni group_extend_out: 4118f82f840SYongqiang Yang ext4_resize_end(sb); 412ac27a0ecSDave Kleikamp return err; 413ac27a0ecSDave Kleikamp } 414748de673SAkira Fujita 415748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 416748de673SAkira Fujita struct move_extent me; 4172903ff01SAl Viro struct fd donor; 4182903ff01SAl Viro int err; 419748de673SAkira Fujita 4204a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 4214a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 4224a58579bSAkira Fujita return -EBADF; 4234a58579bSAkira Fujita 424748de673SAkira Fujita if (copy_from_user(&me, 425748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 426748de673SAkira Fujita return -EFAULT; 4274a58579bSAkira Fujita me.moved_len = 0; 428748de673SAkira Fujita 4292903ff01SAl Viro donor = fdget(me.donor_fd); 4302903ff01SAl Viro if (!donor.file) 431748de673SAkira Fujita return -EBADF; 432748de673SAkira Fujita 4332903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 4344a58579bSAkira Fujita err = -EBADF; 4354a58579bSAkira Fujita goto mext_out; 436748de673SAkira Fujita } 437748de673SAkira Fujita 438bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 439bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 440bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 441bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 442399c9b86SAl Viro err = -EOPNOTSUPP; 443399c9b86SAl Viro goto mext_out; 444bab08ab9STheodore Ts'o } 445bab08ab9STheodore Ts'o 446a561be71SAl Viro err = mnt_want_write_file(filp); 4474a58579bSAkira Fujita if (err) 4484a58579bSAkira Fujita goto mext_out; 4494a58579bSAkira Fujita 4502903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 451748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 4522a79f17eSAl Viro mnt_drop_write_file(filp); 453748de673SAkira Fujita 454c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 455c437b273SAkira Fujita &me, sizeof(me))) 4564a58579bSAkira Fujita err = -EFAULT; 4574a58579bSAkira Fujita mext_out: 4582903ff01SAl Viro fdput(donor); 459748de673SAkira Fujita return err; 460748de673SAkira Fujita } 461748de673SAkira Fujita 462617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 463617ba13bSMingming Cao struct ext4_new_group_data input; 464ac046f1dSPeng Tao int err, err2=0; 465ac27a0ecSDave Kleikamp 4668f82f840SYongqiang Yang err = ext4_resize_begin(sb); 4678f82f840SYongqiang Yang if (err) 4688f82f840SYongqiang Yang return err; 469ac27a0ecSDave Kleikamp 470617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 471014a1770SDjalal Harouni sizeof(input))) { 472014a1770SDjalal Harouni err = -EFAULT; 473014a1770SDjalal Harouni goto group_add_out; 474014a1770SDjalal Harouni } 475ac27a0ecSDave Kleikamp 476bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 477bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 478bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 479bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 480014a1770SDjalal Harouni err = -EOPNOTSUPP; 481014a1770SDjalal Harouni goto group_add_out; 482bab08ab9STheodore Ts'o } 483bab08ab9STheodore Ts'o 484a561be71SAl Viro err = mnt_want_write_file(filp); 48542a74f20SDave Hansen if (err) 486014a1770SDjalal Harouni goto group_add_out; 48742a74f20SDave Hansen 488617ba13bSMingming Cao err = ext4_group_add(sb, &input); 489ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 490dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 4917ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 492dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 493ac046f1dSPeng Tao } 4947ffe1ea8SHidehiro Kawai if (err == 0) 4957ffe1ea8SHidehiro Kawai err = err2; 4962a79f17eSAl Viro mnt_drop_write_file(filp); 4977f511862STheodore Ts'o if (!err && ext4_has_group_desc_csum(sb) && 4987f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 4997f511862STheodore Ts'o err = ext4_register_li_request(sb, input.group); 500014a1770SDjalal Harouni group_add_out: 5018f82f840SYongqiang Yang ext4_resize_end(sb); 502ac27a0ecSDave Kleikamp return err; 503ac27a0ecSDave Kleikamp } 504ac27a0ecSDave Kleikamp 505c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 5062a43a878SAneesh Kumar K.V { 5072a43a878SAneesh Kumar K.V int err; 5082e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 5092a43a878SAneesh Kumar K.V return -EACCES; 5102a43a878SAneesh Kumar K.V 511a561be71SAl Viro err = mnt_want_write_file(filp); 5122a43a878SAneesh Kumar K.V if (err) 5132a43a878SAneesh Kumar K.V return err; 5142a43a878SAneesh Kumar K.V /* 5152a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 5162a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 5172a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 5182a43a878SAneesh Kumar K.V * inode format to prevent read. 5192a43a878SAneesh Kumar K.V */ 5202a43a878SAneesh Kumar K.V mutex_lock(&(inode->i_mutex)); 5212a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 5222a43a878SAneesh Kumar K.V mutex_unlock(&(inode->i_mutex)); 5232a79f17eSAl Viro mnt_drop_write_file(filp); 5242a43a878SAneesh Kumar K.V return err; 5252a43a878SAneesh Kumar K.V } 526c14c6fd5SAneesh Kumar K.V 527ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 528ccd2506bSTheodore Ts'o { 529ccd2506bSTheodore Ts'o int err; 5302e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 531ccd2506bSTheodore Ts'o return -EACCES; 532ccd2506bSTheodore Ts'o 533a561be71SAl Viro err = mnt_want_write_file(filp); 534ccd2506bSTheodore Ts'o if (err) 535ccd2506bSTheodore Ts'o return err; 536ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 5372a79f17eSAl Viro mnt_drop_write_file(filp); 538ccd2506bSTheodore Ts'o return err; 539ccd2506bSTheodore Ts'o } 540ccd2506bSTheodore Ts'o 541393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 5423e67cfadSDmitry Monakhov { 5433e67cfadSDmitry Monakhov int err; 544393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 545393d1d1dSDr. Tilmann Bubeck return -EBADF; 5463e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 5473e67cfadSDmitry Monakhov if (err) 5483e67cfadSDmitry Monakhov return err; 5493e67cfadSDmitry Monakhov err = swap_inode_boot_loader(sb, inode); 5503e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 5513e67cfadSDmitry Monakhov return err; 5523e67cfadSDmitry Monakhov } 553393d1d1dSDr. Tilmann Bubeck 55419c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 55519c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 55619c5246dSYongqiang Yang int err = 0, err2 = 0; 5577f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 55819c5246dSYongqiang Yang 55919c5246dSYongqiang Yang if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 56019c5246dSYongqiang Yang EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 56119c5246dSYongqiang Yang ext4_msg(sb, KERN_ERR, 56219c5246dSYongqiang Yang "Online resizing not (yet) supported with bigalloc"); 56319c5246dSYongqiang Yang return -EOPNOTSUPP; 56419c5246dSYongqiang Yang } 56519c5246dSYongqiang Yang 56619c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 56719c5246dSYongqiang Yang sizeof(__u64))) { 56819c5246dSYongqiang Yang return -EFAULT; 56919c5246dSYongqiang Yang } 57019c5246dSYongqiang Yang 57119c5246dSYongqiang Yang err = ext4_resize_begin(sb); 57219c5246dSYongqiang Yang if (err) 57319c5246dSYongqiang Yang return err; 57419c5246dSYongqiang Yang 5758cae6f71SAl Viro err = mnt_want_write_file(filp); 57619c5246dSYongqiang Yang if (err) 57719c5246dSYongqiang Yang goto resizefs_out; 57819c5246dSYongqiang Yang 57919c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 58019c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 58119c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 58219c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 58319c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 58419c5246dSYongqiang Yang } 58519c5246dSYongqiang Yang if (err == 0) 58619c5246dSYongqiang Yang err = err2; 5878cae6f71SAl Viro mnt_drop_write_file(filp); 5887f511862STheodore Ts'o if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && 5897f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 5907f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 5917f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 5927f511862STheodore Ts'o 59319c5246dSYongqiang Yang resizefs_out: 59419c5246dSYongqiang Yang ext4_resize_end(sb); 59519c5246dSYongqiang Yang return err; 59619c5246dSYongqiang Yang } 59719c5246dSYongqiang Yang 598e681c047SLukas Czerner case FITRIM: 599e681c047SLukas Czerner { 60041431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 601e681c047SLukas Czerner struct fstrim_range range; 602e681c047SLukas Czerner int ret = 0; 603e681c047SLukas Czerner 604e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 605e681c047SLukas Czerner return -EPERM; 606e681c047SLukas Czerner 60741431792SLukas Czerner if (!blk_queue_discard(q)) 60841431792SLukas Czerner return -EOPNOTSUPP; 60941431792SLukas Czerner 610e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 611e681c047SLukas Czerner sizeof(range))) 612e681c047SLukas Czerner return -EFAULT; 613e681c047SLukas Czerner 6145c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 6155c2ed62fSLukas Czerner q->limits.discard_granularity); 616e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 617e681c047SLukas Czerner if (ret < 0) 618e681c047SLukas Czerner return ret; 619e681c047SLukas Czerner 620e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 621e681c047SLukas Czerner sizeof(range))) 622e681c047SLukas Czerner return -EFAULT; 623e681c047SLukas Czerner 624e681c047SLukas Czerner return 0; 625e681c047SLukas Czerner } 6267869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 6277869a4a6STheodore Ts'o return ext4_ext_precache(inode); 6289bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: { 6299bd8212fSMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 6309bd8212fSMichael Halcrow struct ext4_encryption_policy policy; 6319bd8212fSMichael Halcrow int err = 0; 632e681c047SLukas Czerner 6339bd8212fSMichael Halcrow if (copy_from_user(&policy, 6349bd8212fSMichael Halcrow (struct ext4_encryption_policy __user *)arg, 6359bd8212fSMichael Halcrow sizeof(policy))) { 6369bd8212fSMichael Halcrow err = -EFAULT; 6379bd8212fSMichael Halcrow goto encryption_policy_out; 6389bd8212fSMichael Halcrow } 6399bd8212fSMichael Halcrow 6409bd8212fSMichael Halcrow err = ext4_process_policy(&policy, inode); 6419bd8212fSMichael Halcrow encryption_policy_out: 6429bd8212fSMichael Halcrow return err; 6439bd8212fSMichael Halcrow #else 6449bd8212fSMichael Halcrow return -EOPNOTSUPP; 6459bd8212fSMichael Halcrow #endif 6469bd8212fSMichael Halcrow } 6479bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: { 6489bd8212fSMichael Halcrow int err, err2; 6499bd8212fSMichael Halcrow struct ext4_sb_info *sbi = EXT4_SB(sb); 6509bd8212fSMichael Halcrow handle_t *handle; 6519bd8212fSMichael Halcrow 6529bd8212fSMichael Halcrow if (!ext4_sb_has_crypto(sb)) 6539bd8212fSMichael Halcrow return -EOPNOTSUPP; 6549bd8212fSMichael Halcrow if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { 6559bd8212fSMichael Halcrow err = mnt_want_write_file(filp); 6569bd8212fSMichael Halcrow if (err) 6579bd8212fSMichael Halcrow return err; 6589bd8212fSMichael Halcrow handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 6599bd8212fSMichael Halcrow if (IS_ERR(handle)) { 6609bd8212fSMichael Halcrow err = PTR_ERR(handle); 6619bd8212fSMichael Halcrow goto pwsalt_err_exit; 6629bd8212fSMichael Halcrow } 6639bd8212fSMichael Halcrow err = ext4_journal_get_write_access(handle, sbi->s_sbh); 6649bd8212fSMichael Halcrow if (err) 6659bd8212fSMichael Halcrow goto pwsalt_err_journal; 6669bd8212fSMichael Halcrow generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); 6679bd8212fSMichael Halcrow err = ext4_handle_dirty_metadata(handle, NULL, 6689bd8212fSMichael Halcrow sbi->s_sbh); 6699bd8212fSMichael Halcrow pwsalt_err_journal: 6709bd8212fSMichael Halcrow err2 = ext4_journal_stop(handle); 6719bd8212fSMichael Halcrow if (err2 && !err) 6729bd8212fSMichael Halcrow err = err2; 6739bd8212fSMichael Halcrow pwsalt_err_exit: 6749bd8212fSMichael Halcrow mnt_drop_write_file(filp); 6759bd8212fSMichael Halcrow if (err) 6769bd8212fSMichael Halcrow return err; 6779bd8212fSMichael Halcrow } 6789bd8212fSMichael Halcrow if (copy_to_user((void *) arg, sbi->s_es->s_encrypt_pw_salt, 6799bd8212fSMichael Halcrow 16)) 6809bd8212fSMichael Halcrow return -EFAULT; 6819bd8212fSMichael Halcrow return 0; 6829bd8212fSMichael Halcrow } 6839bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: { 6849bd8212fSMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 6859bd8212fSMichael Halcrow struct ext4_encryption_policy policy; 6869bd8212fSMichael Halcrow int err = 0; 6879bd8212fSMichael Halcrow 6889bd8212fSMichael Halcrow if (!ext4_encrypted_inode(inode)) 6899bd8212fSMichael Halcrow return -ENOENT; 6909bd8212fSMichael Halcrow err = ext4_get_policy(inode, &policy); 6919bd8212fSMichael Halcrow if (err) 6929bd8212fSMichael Halcrow return err; 6939bd8212fSMichael Halcrow if (copy_to_user((void *)arg, &policy, sizeof(policy))) 6949bd8212fSMichael Halcrow return -EFAULT; 6959bd8212fSMichael Halcrow return 0; 6969bd8212fSMichael Halcrow #else 6979bd8212fSMichael Halcrow return -EOPNOTSUPP; 6989bd8212fSMichael Halcrow #endif 6999bd8212fSMichael Halcrow } 700ac27a0ecSDave Kleikamp default: 701ac27a0ecSDave Kleikamp return -ENOTTY; 702ac27a0ecSDave Kleikamp } 703ac27a0ecSDave Kleikamp } 704ac27a0ecSDave Kleikamp 705ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 706617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 707ac27a0ecSDave Kleikamp { 708ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 709ac27a0ecSDave Kleikamp switch (cmd) { 710617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 711617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 712ac27a0ecSDave Kleikamp break; 713617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 714617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 715ac27a0ecSDave Kleikamp break; 716617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 717617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 718ac27a0ecSDave Kleikamp break; 719617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 720617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 721ac27a0ecSDave Kleikamp break; 722617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 723617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 724ac27a0ecSDave Kleikamp break; 725617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 726617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 727ac27a0ecSDave Kleikamp break; 728617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 729617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 730ac27a0ecSDave Kleikamp break; 731617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 732617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 733ac27a0ecSDave Kleikamp break; 734617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 735617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 736ac27a0ecSDave Kleikamp break; 7374d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 7384d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 7394d92dc0fSBen Hutchings struct ext4_new_group_input input; 7404d92dc0fSBen Hutchings mm_segment_t old_fs; 7414d92dc0fSBen Hutchings int err; 7424d92dc0fSBen Hutchings 7434d92dc0fSBen Hutchings uinput = compat_ptr(arg); 7444d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 7454d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 7464d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 7474d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 7484d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 7494d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 7504d92dc0fSBen Hutchings &uinput->reserved_blocks); 7514d92dc0fSBen Hutchings if (err) 7524d92dc0fSBen Hutchings return -EFAULT; 7534d92dc0fSBen Hutchings old_fs = get_fs(); 7544d92dc0fSBen Hutchings set_fs(KERNEL_DS); 7554d92dc0fSBen Hutchings err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 7564d92dc0fSBen Hutchings (unsigned long) &input); 7574d92dc0fSBen Hutchings set_fs(old_fs); 7584d92dc0fSBen Hutchings return err; 7594d92dc0fSBen Hutchings } 760b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 761a56e69c2STao Ma case FITRIM: 76219c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 7637869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 7649bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: 7659bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: 7669bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: 767b684b2eeSChristian Borntraeger break; 768ac27a0ecSDave Kleikamp default: 769ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 770ac27a0ecSDave Kleikamp } 7715cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 772ac27a0ecSDave Kleikamp } 773ac27a0ecSDave Kleikamp #endif 774