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> 179b7365fcSLi Xi #include <linux/quotaops.h> 18ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 193dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 203dcf5451SChristoph Hellwig #include "ext4.h" 21ac27a0ecSDave Kleikamp 2219c5246dSYongqiang Yang #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) 2319c5246dSYongqiang Yang 24393d1d1dSDr. Tilmann Bubeck /** 25393d1d1dSDr. Tilmann Bubeck * Swap memory between @a and @b for @len bytes. 26393d1d1dSDr. Tilmann Bubeck * 27393d1d1dSDr. Tilmann Bubeck * @a: pointer to first memory area 28393d1d1dSDr. Tilmann Bubeck * @b: pointer to second memory area 29393d1d1dSDr. Tilmann Bubeck * @len: number of bytes to swap 30393d1d1dSDr. Tilmann Bubeck * 31393d1d1dSDr. Tilmann Bubeck */ 32393d1d1dSDr. Tilmann Bubeck static void memswap(void *a, void *b, size_t len) 33393d1d1dSDr. Tilmann Bubeck { 34393d1d1dSDr. Tilmann Bubeck unsigned char *ap, *bp; 35393d1d1dSDr. Tilmann Bubeck 36393d1d1dSDr. Tilmann Bubeck ap = (unsigned char *)a; 37393d1d1dSDr. Tilmann Bubeck bp = (unsigned char *)b; 38393d1d1dSDr. Tilmann Bubeck while (len-- > 0) { 394b7e2db5SFabian Frederick swap(*ap, *bp); 40393d1d1dSDr. Tilmann Bubeck ap++; 41393d1d1dSDr. Tilmann Bubeck bp++; 42393d1d1dSDr. Tilmann Bubeck } 43393d1d1dSDr. Tilmann Bubeck } 44393d1d1dSDr. Tilmann Bubeck 45393d1d1dSDr. Tilmann Bubeck /** 46393d1d1dSDr. Tilmann Bubeck * Swap i_data and associated attributes between @inode1 and @inode2. 47393d1d1dSDr. Tilmann Bubeck * This function is used for the primary swap between inode1 and inode2 48393d1d1dSDr. Tilmann Bubeck * and also to revert this primary swap in case of errors. 49393d1d1dSDr. Tilmann Bubeck * 50393d1d1dSDr. Tilmann Bubeck * Therefore you have to make sure, that calling this method twice 51393d1d1dSDr. Tilmann Bubeck * will revert all changes. 52393d1d1dSDr. Tilmann Bubeck * 53393d1d1dSDr. Tilmann Bubeck * @inode1: pointer to first inode 54393d1d1dSDr. Tilmann Bubeck * @inode2: pointer to second inode 55393d1d1dSDr. Tilmann Bubeck */ 56393d1d1dSDr. Tilmann Bubeck static void swap_inode_data(struct inode *inode1, struct inode *inode2) 57393d1d1dSDr. Tilmann Bubeck { 58393d1d1dSDr. Tilmann Bubeck loff_t isize; 59393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei1; 60393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei2; 61393d1d1dSDr. Tilmann Bubeck 62393d1d1dSDr. Tilmann Bubeck ei1 = EXT4_I(inode1); 63393d1d1dSDr. Tilmann Bubeck ei2 = EXT4_I(inode2); 64393d1d1dSDr. Tilmann Bubeck 65393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); 66393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_version, &inode2->i_version, 67393d1d1dSDr. Tilmann Bubeck sizeof(inode1->i_version)); 68393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_blocks, &inode2->i_blocks, 69393d1d1dSDr. Tilmann Bubeck sizeof(inode1->i_blocks)); 70393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); 71393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); 72393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); 73393d1d1dSDr. Tilmann Bubeck 74393d1d1dSDr. Tilmann Bubeck memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); 75393d1d1dSDr. Tilmann Bubeck memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); 76393d1d1dSDr. Tilmann Bubeck memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); 77cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); 78cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); 79393d1d1dSDr. Tilmann Bubeck 80393d1d1dSDr. Tilmann Bubeck isize = i_size_read(inode1); 81393d1d1dSDr. Tilmann Bubeck i_size_write(inode1, i_size_read(inode2)); 82393d1d1dSDr. Tilmann Bubeck i_size_write(inode2, isize); 83393d1d1dSDr. Tilmann Bubeck } 84393d1d1dSDr. Tilmann Bubeck 85393d1d1dSDr. Tilmann Bubeck /** 86393d1d1dSDr. Tilmann Bubeck * Swap the information from the given @inode and the inode 87393d1d1dSDr. Tilmann Bubeck * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 88393d1d1dSDr. Tilmann Bubeck * important fields of the inodes. 89393d1d1dSDr. Tilmann Bubeck * 90393d1d1dSDr. Tilmann Bubeck * @sb: the super block of the filesystem 91393d1d1dSDr. Tilmann Bubeck * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 92393d1d1dSDr. Tilmann Bubeck * 93393d1d1dSDr. Tilmann Bubeck */ 94393d1d1dSDr. Tilmann Bubeck static long swap_inode_boot_loader(struct super_block *sb, 95393d1d1dSDr. Tilmann Bubeck struct inode *inode) 96393d1d1dSDr. Tilmann Bubeck { 97393d1d1dSDr. Tilmann Bubeck handle_t *handle; 98393d1d1dSDr. Tilmann Bubeck int err; 99393d1d1dSDr. Tilmann Bubeck struct inode *inode_bl; 100393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei_bl; 101d7092ae2Sjon ernst struct ext4_sb_info *sbi = EXT4_SB(sb); 102393d1d1dSDr. Tilmann Bubeck 103d8558a29STheodore Ts'o if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) 104d8558a29STheodore Ts'o return -EINVAL; 105393d1d1dSDr. Tilmann Bubeck 106d8558a29STheodore Ts'o if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) 107d8558a29STheodore Ts'o return -EPERM; 108393d1d1dSDr. Tilmann Bubeck 109393d1d1dSDr. Tilmann Bubeck inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); 110d8558a29STheodore Ts'o if (IS_ERR(inode_bl)) 111d8558a29STheodore Ts'o return PTR_ERR(inode_bl); 112393d1d1dSDr. Tilmann Bubeck ei_bl = EXT4_I(inode_bl); 113393d1d1dSDr. Tilmann Bubeck 114393d1d1dSDr. Tilmann Bubeck filemap_flush(inode->i_mapping); 115393d1d1dSDr. Tilmann Bubeck filemap_flush(inode_bl->i_mapping); 116393d1d1dSDr. Tilmann Bubeck 117393d1d1dSDr. Tilmann Bubeck /* Protect orig inodes against a truncate and make sure, 118393d1d1dSDr. Tilmann Bubeck * that only 1 swap_inode_boot_loader is running. */ 119375e289eSJ. Bruce Fields lock_two_nondirectories(inode, inode_bl); 120393d1d1dSDr. Tilmann Bubeck 121393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode->i_data, 0); 122393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode_bl->i_data, 0); 123393d1d1dSDr. Tilmann Bubeck 124393d1d1dSDr. Tilmann Bubeck /* Wait for all existing dio workers */ 125393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode); 126393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode_bl); 127393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode); 128393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode_bl); 129393d1d1dSDr. Tilmann Bubeck 130393d1d1dSDr. Tilmann Bubeck handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 131393d1d1dSDr. Tilmann Bubeck if (IS_ERR(handle)) { 132393d1d1dSDr. Tilmann Bubeck err = -EINVAL; 13330d29b11SZheng Liu goto journal_err_out; 134393d1d1dSDr. Tilmann Bubeck } 135393d1d1dSDr. Tilmann Bubeck 136393d1d1dSDr. Tilmann Bubeck /* Protect extent tree against block allocations via delalloc */ 137393d1d1dSDr. Tilmann Bubeck ext4_double_down_write_data_sem(inode, inode_bl); 138393d1d1dSDr. Tilmann Bubeck 139393d1d1dSDr. Tilmann Bubeck if (inode_bl->i_nlink == 0) { 140393d1d1dSDr. Tilmann Bubeck /* this inode has never been used as a BOOT_LOADER */ 141393d1d1dSDr. Tilmann Bubeck set_nlink(inode_bl, 1); 142393d1d1dSDr. Tilmann Bubeck i_uid_write(inode_bl, 0); 143393d1d1dSDr. Tilmann Bubeck i_gid_write(inode_bl, 0); 144393d1d1dSDr. Tilmann Bubeck inode_bl->i_flags = 0; 145393d1d1dSDr. Tilmann Bubeck ei_bl->i_flags = 0; 146393d1d1dSDr. Tilmann Bubeck inode_bl->i_version = 1; 147393d1d1dSDr. Tilmann Bubeck i_size_write(inode_bl, 0); 148393d1d1dSDr. Tilmann Bubeck inode_bl->i_mode = S_IFREG; 149e2b911c5SDarrick J. Wong if (ext4_has_feature_extents(sb)) { 150393d1d1dSDr. Tilmann Bubeck ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 151393d1d1dSDr. Tilmann Bubeck ext4_ext_tree_init(handle, inode_bl); 152393d1d1dSDr. Tilmann Bubeck } else 153393d1d1dSDr. Tilmann Bubeck memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 154393d1d1dSDr. Tilmann Bubeck } 155393d1d1dSDr. Tilmann Bubeck 156393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 157393d1d1dSDr. Tilmann Bubeck 158393d1d1dSDr. Tilmann Bubeck inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); 159393d1d1dSDr. Tilmann Bubeck 160393d1d1dSDr. Tilmann Bubeck spin_lock(&sbi->s_next_gen_lock); 161393d1d1dSDr. Tilmann Bubeck inode->i_generation = sbi->s_next_generation++; 162393d1d1dSDr. Tilmann Bubeck inode_bl->i_generation = sbi->s_next_generation++; 163393d1d1dSDr. Tilmann Bubeck spin_unlock(&sbi->s_next_gen_lock); 164393d1d1dSDr. Tilmann Bubeck 165393d1d1dSDr. Tilmann Bubeck ext4_discard_preallocations(inode); 166393d1d1dSDr. Tilmann Bubeck 167393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode); 168393d1d1dSDr. Tilmann Bubeck if (err < 0) { 169393d1d1dSDr. Tilmann Bubeck ext4_warning(inode->i_sb, 170393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 171393d1d1dSDr. Tilmann Bubeck inode->i_ino, err); 172393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 173393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 174393d1d1dSDr. Tilmann Bubeck } else { 175393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode_bl); 176393d1d1dSDr. Tilmann Bubeck if (err < 0) { 177393d1d1dSDr. Tilmann Bubeck ext4_warning(inode_bl->i_sb, 178393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 179393d1d1dSDr. Tilmann Bubeck inode_bl->i_ino, err); 180393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 181393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 182393d1d1dSDr. Tilmann Bubeck ext4_mark_inode_dirty(handle, inode); 183393d1d1dSDr. Tilmann Bubeck } 184393d1d1dSDr. Tilmann Bubeck } 185393d1d1dSDr. Tilmann Bubeck ext4_journal_stop(handle); 186393d1d1dSDr. Tilmann Bubeck ext4_double_up_write_data_sem(inode, inode_bl); 187393d1d1dSDr. Tilmann Bubeck 18830d29b11SZheng Liu journal_err_out: 189393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode); 190393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode_bl); 191375e289eSJ. Bruce Fields unlock_two_nondirectories(inode, inode_bl); 192393d1d1dSDr. Tilmann Bubeck iput(inode_bl); 193393d1d1dSDr. Tilmann Bubeck return err; 194393d1d1dSDr. Tilmann Bubeck } 195393d1d1dSDr. Tilmann Bubeck 1969bd8212fSMichael Halcrow static int uuid_is_zero(__u8 u[16]) 1979bd8212fSMichael Halcrow { 1989bd8212fSMichael Halcrow int i; 1999bd8212fSMichael Halcrow 2009bd8212fSMichael Halcrow for (i = 0; i < 16; i++) 2019bd8212fSMichael Halcrow if (u[i]) 2029bd8212fSMichael Halcrow return 0; 2039bd8212fSMichael Halcrow return 1; 2049bd8212fSMichael Halcrow } 2059bd8212fSMichael Halcrow 2069b7365fcSLi Xi static int ext4_ioctl_setflags(struct inode *inode, 2079b7365fcSLi Xi unsigned int flags) 208ac27a0ecSDave Kleikamp { 209617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 210ac27a0ecSDave Kleikamp handle_t *handle = NULL; 2119b7365fcSLi Xi int err = EPERM, migrate = 0; 212617ba13bSMingming Cao struct ext4_iloc iloc; 21379906964STheodore Ts'o unsigned int oldflags, mask, i; 214ac27a0ecSDave Kleikamp unsigned int jflag; 215ac27a0ecSDave Kleikamp 216e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 21742a74f20SDave Hansen if (IS_NOQUOTA(inode)) 21842a74f20SDave Hansen goto flags_out; 21942a74f20SDave Hansen 220ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 221ac27a0ecSDave Kleikamp 222ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 223617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 224ac27a0ecSDave Kleikamp 225ac27a0ecSDave Kleikamp /* 226ac27a0ecSDave Kleikamp * The IMMUTABLE and APPEND_ONLY flags can only be changed by 227ac27a0ecSDave Kleikamp * the relevant capability. 228ac27a0ecSDave Kleikamp * 229ac27a0ecSDave Kleikamp * This test looks nicer. Thanks to Pauline Middelink 230ac27a0ecSDave Kleikamp */ 231617ba13bSMingming Cao if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 23242a74f20SDave Hansen if (!capable(CAP_LINUX_IMMUTABLE)) 23342a74f20SDave Hansen goto flags_out; 234ac27a0ecSDave Kleikamp } 235ac27a0ecSDave Kleikamp 236ac27a0ecSDave Kleikamp /* 237ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 238ac27a0ecSDave Kleikamp * the relevant capability. 239ac27a0ecSDave Kleikamp */ 240617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 24142a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 24242a74f20SDave Hansen goto flags_out; 243ac27a0ecSDave Kleikamp } 244996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 2454db46fc2SAneesh Kumar K.V migrate = 1; 246ac27a0ecSDave Kleikamp 247c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 248c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 249c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 250c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 251c8d46e41SJiaying Zhang goto flags_out; 252c8d46e41SJiaying Zhang } 253c8d46e41SJiaying Zhang } else if (oldflags & EXT4_EOFBLOCKS_FL) 254c8d46e41SJiaying Zhang ext4_truncate(inode); 255c8d46e41SJiaying Zhang 2569924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 257ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 25842a74f20SDave Hansen err = PTR_ERR(handle); 25942a74f20SDave Hansen goto flags_out; 260ac27a0ecSDave Kleikamp } 261ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 2620390131bSFrank Mayhar ext4_handle_sync(handle); 263617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 264ac27a0ecSDave Kleikamp if (err) 265ac27a0ecSDave Kleikamp goto flags_err; 266ac27a0ecSDave Kleikamp 26779906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 26879906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 26979906964STheodore Ts'o continue; 27079906964STheodore Ts'o if (mask & flags) 27179906964STheodore Ts'o ext4_set_inode_flag(inode, i); 27279906964STheodore Ts'o else 27379906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 27479906964STheodore Ts'o } 275ac27a0ecSDave Kleikamp 276617ba13bSMingming Cao ext4_set_inode_flags(inode); 277ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 278ac27a0ecSDave Kleikamp 279617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 280ac27a0ecSDave Kleikamp flags_err: 281617ba13bSMingming Cao ext4_journal_stop(handle); 28242a74f20SDave Hansen if (err) 28342a74f20SDave Hansen goto flags_out; 284ac27a0ecSDave Kleikamp 285617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 286617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 2874db46fc2SAneesh Kumar K.V if (err) 2884db46fc2SAneesh Kumar K.V goto flags_out; 289996bb9fdSTheodore Ts'o if (migrate) { 290996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 2914db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 292996bb9fdSTheodore Ts'o else 293996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 294996bb9fdSTheodore Ts'o } 295996bb9fdSTheodore Ts'o 29642a74f20SDave Hansen flags_out: 2979b7365fcSLi Xi return err; 2989b7365fcSLi Xi } 2999b7365fcSLi Xi 3009b7365fcSLi Xi #ifdef CONFIG_QUOTA 3019b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 3029b7365fcSLi Xi { 3039b7365fcSLi Xi struct inode *inode = file_inode(filp); 3049b7365fcSLi Xi struct super_block *sb = inode->i_sb; 3059b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 3069b7365fcSLi Xi int err, rc; 3079b7365fcSLi Xi handle_t *handle; 3089b7365fcSLi Xi kprojid_t kprojid; 3099b7365fcSLi Xi struct ext4_iloc iloc; 3109b7365fcSLi Xi struct ext4_inode *raw_inode; 3119b7365fcSLi Xi 3129b7365fcSLi Xi if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 3139b7365fcSLi Xi EXT4_FEATURE_RO_COMPAT_PROJECT)) { 3149b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 3159b7365fcSLi Xi return -EOPNOTSUPP; 3169b7365fcSLi Xi else 3179b7365fcSLi Xi return 0; 3189b7365fcSLi Xi } 3199b7365fcSLi Xi 3209b7365fcSLi Xi if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 3219b7365fcSLi Xi return -EOPNOTSUPP; 3229b7365fcSLi Xi 3239b7365fcSLi Xi kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 3249b7365fcSLi Xi 3259b7365fcSLi Xi if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 3269b7365fcSLi Xi return 0; 3279b7365fcSLi Xi 3289b7365fcSLi Xi err = mnt_want_write_file(filp); 3299b7365fcSLi Xi if (err) 3309b7365fcSLi Xi return err; 3319b7365fcSLi Xi 3329b7365fcSLi Xi err = -EPERM; 3339b7365fcSLi Xi mutex_lock(&inode->i_mutex); 3349b7365fcSLi Xi /* Is it quota file? Do not allow user to mess with it */ 3359b7365fcSLi Xi if (IS_NOQUOTA(inode)) 3369b7365fcSLi Xi goto out_unlock; 3379b7365fcSLi Xi 3389b7365fcSLi Xi err = ext4_get_inode_loc(inode, &iloc); 3399b7365fcSLi Xi if (err) 3409b7365fcSLi Xi goto out_unlock; 3419b7365fcSLi Xi 3429b7365fcSLi Xi raw_inode = ext4_raw_inode(&iloc); 3439b7365fcSLi Xi if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 3449b7365fcSLi Xi err = -EOVERFLOW; 3459b7365fcSLi Xi brelse(iloc.bh); 3469b7365fcSLi Xi goto out_unlock; 3479b7365fcSLi Xi } 3489b7365fcSLi Xi brelse(iloc.bh); 3499b7365fcSLi Xi 3509b7365fcSLi Xi dquot_initialize(inode); 3519b7365fcSLi Xi 3529b7365fcSLi Xi handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 3539b7365fcSLi Xi EXT4_QUOTA_INIT_BLOCKS(sb) + 3549b7365fcSLi Xi EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 3559b7365fcSLi Xi if (IS_ERR(handle)) { 3569b7365fcSLi Xi err = PTR_ERR(handle); 3579b7365fcSLi Xi goto out_unlock; 3589b7365fcSLi Xi } 3599b7365fcSLi Xi 3609b7365fcSLi Xi err = ext4_reserve_inode_write(handle, inode, &iloc); 3619b7365fcSLi Xi if (err) 3629b7365fcSLi Xi goto out_stop; 3639b7365fcSLi Xi 3649b7365fcSLi Xi if (sb_has_quota_limits_enabled(sb, PRJQUOTA)) { 3659b7365fcSLi Xi struct dquot *transfer_to[MAXQUOTAS] = { }; 3669b7365fcSLi Xi 3679b7365fcSLi Xi transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 3689b7365fcSLi Xi if (transfer_to[PRJQUOTA]) { 3699b7365fcSLi Xi err = __dquot_transfer(inode, transfer_to); 3709b7365fcSLi Xi dqput(transfer_to[PRJQUOTA]); 3719b7365fcSLi Xi if (err) 3729b7365fcSLi Xi goto out_dirty; 3739b7365fcSLi Xi } 3749b7365fcSLi Xi } 3759b7365fcSLi Xi EXT4_I(inode)->i_projid = kprojid; 3769b7365fcSLi Xi inode->i_ctime = ext4_current_time(inode); 3779b7365fcSLi Xi out_dirty: 3789b7365fcSLi Xi rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 3799b7365fcSLi Xi if (!err) 3809b7365fcSLi Xi err = rc; 3819b7365fcSLi Xi out_stop: 3829b7365fcSLi Xi ext4_journal_stop(handle); 3839b7365fcSLi Xi out_unlock: 3849b7365fcSLi Xi mutex_unlock(&inode->i_mutex); 3859b7365fcSLi Xi mnt_drop_write_file(filp); 3869b7365fcSLi Xi return err; 3879b7365fcSLi Xi } 3889b7365fcSLi Xi #else 3899b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 3909b7365fcSLi Xi { 3919b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 3929b7365fcSLi Xi return -EOPNOTSUPP; 3939b7365fcSLi Xi return 0; 3949b7365fcSLi Xi } 3959b7365fcSLi Xi #endif 3969b7365fcSLi Xi 3979b7365fcSLi Xi /* Transfer internal flags to xflags */ 3989b7365fcSLi Xi static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) 3999b7365fcSLi Xi { 4009b7365fcSLi Xi __u32 xflags = 0; 4019b7365fcSLi Xi 4029b7365fcSLi Xi if (iflags & EXT4_SYNC_FL) 4039b7365fcSLi Xi xflags |= FS_XFLAG_SYNC; 4049b7365fcSLi Xi if (iflags & EXT4_IMMUTABLE_FL) 4059b7365fcSLi Xi xflags |= FS_XFLAG_IMMUTABLE; 4069b7365fcSLi Xi if (iflags & EXT4_APPEND_FL) 4079b7365fcSLi Xi xflags |= FS_XFLAG_APPEND; 4089b7365fcSLi Xi if (iflags & EXT4_NODUMP_FL) 4099b7365fcSLi Xi xflags |= FS_XFLAG_NODUMP; 4109b7365fcSLi Xi if (iflags & EXT4_NOATIME_FL) 4119b7365fcSLi Xi xflags |= FS_XFLAG_NOATIME; 4129b7365fcSLi Xi if (iflags & EXT4_PROJINHERIT_FL) 4139b7365fcSLi Xi xflags |= FS_XFLAG_PROJINHERIT; 4149b7365fcSLi Xi return xflags; 4159b7365fcSLi Xi } 4169b7365fcSLi Xi 4179b7365fcSLi Xi /* Transfer xflags flags to internal */ 4189b7365fcSLi Xi static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) 4199b7365fcSLi Xi { 4209b7365fcSLi Xi unsigned long iflags = 0; 4219b7365fcSLi Xi 4229b7365fcSLi Xi if (xflags & FS_XFLAG_SYNC) 4239b7365fcSLi Xi iflags |= EXT4_SYNC_FL; 4249b7365fcSLi Xi if (xflags & FS_XFLAG_IMMUTABLE) 4259b7365fcSLi Xi iflags |= EXT4_IMMUTABLE_FL; 4269b7365fcSLi Xi if (xflags & FS_XFLAG_APPEND) 4279b7365fcSLi Xi iflags |= EXT4_APPEND_FL; 4289b7365fcSLi Xi if (xflags & FS_XFLAG_NODUMP) 4299b7365fcSLi Xi iflags |= EXT4_NODUMP_FL; 4309b7365fcSLi Xi if (xflags & FS_XFLAG_NOATIME) 4319b7365fcSLi Xi iflags |= EXT4_NOATIME_FL; 4329b7365fcSLi Xi if (xflags & FS_XFLAG_PROJINHERIT) 4339b7365fcSLi Xi iflags |= EXT4_PROJINHERIT_FL; 4349b7365fcSLi Xi 4359b7365fcSLi Xi return iflags; 4369b7365fcSLi Xi } 4379b7365fcSLi Xi 4389b7365fcSLi Xi long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 4399b7365fcSLi Xi { 4409b7365fcSLi Xi struct inode *inode = file_inode(filp); 4419b7365fcSLi Xi struct super_block *sb = inode->i_sb; 4429b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 4439b7365fcSLi Xi unsigned int flags; 4449b7365fcSLi Xi 4459b7365fcSLi Xi ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 4469b7365fcSLi Xi 4479b7365fcSLi Xi switch (cmd) { 4489b7365fcSLi Xi case EXT4_IOC_GETFLAGS: 4499b7365fcSLi Xi ext4_get_inode_flags(ei); 4509b7365fcSLi Xi flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 4519b7365fcSLi Xi return put_user(flags, (int __user *) arg); 4529b7365fcSLi Xi case EXT4_IOC_SETFLAGS: { 4539b7365fcSLi Xi int err; 4549b7365fcSLi Xi 4559b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 4569b7365fcSLi Xi return -EACCES; 4579b7365fcSLi Xi 4589b7365fcSLi Xi if (get_user(flags, (int __user *) arg)) 4599b7365fcSLi Xi return -EFAULT; 4609b7365fcSLi Xi 4619b7365fcSLi Xi err = mnt_want_write_file(filp); 4629b7365fcSLi Xi if (err) 4639b7365fcSLi Xi return err; 4649b7365fcSLi Xi 4659b7365fcSLi Xi flags = ext4_mask_flags(inode->i_mode, flags); 4669b7365fcSLi Xi 4679b7365fcSLi Xi mutex_lock(&inode->i_mutex); 4689b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 469ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 4702a79f17eSAl Viro mnt_drop_write_file(filp); 471ac27a0ecSDave Kleikamp return err; 472ac27a0ecSDave Kleikamp } 473617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 474617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 475ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 476617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 477617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 478ac27a0ecSDave Kleikamp handle_t *handle; 479617ba13bSMingming Cao struct ext4_iloc iloc; 480ac27a0ecSDave Kleikamp __u32 generation; 481ac27a0ecSDave Kleikamp int err; 482ac27a0ecSDave Kleikamp 4832e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 484ac27a0ecSDave Kleikamp return -EPERM; 48542a74f20SDave Hansen 4869aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 487814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 488814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 489814525f4SDarrick J. Wong return -ENOTTY; 490814525f4SDarrick J. Wong } 491814525f4SDarrick J. Wong 492a561be71SAl Viro err = mnt_want_write_file(filp); 49342a74f20SDave Hansen if (err) 49442a74f20SDave Hansen return err; 49542a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 49642a74f20SDave Hansen err = -EFAULT; 49742a74f20SDave Hansen goto setversion_out; 49842a74f20SDave Hansen } 499ac27a0ecSDave Kleikamp 5006c2155b9SDjalal Harouni mutex_lock(&inode->i_mutex); 5019924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 50242a74f20SDave Hansen if (IS_ERR(handle)) { 50342a74f20SDave Hansen err = PTR_ERR(handle); 5046c2155b9SDjalal Harouni goto unlock_out; 50542a74f20SDave Hansen } 506617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 507ac27a0ecSDave Kleikamp if (err == 0) { 508ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 509ac27a0ecSDave Kleikamp inode->i_generation = generation; 510617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 511ac27a0ecSDave Kleikamp } 512617ba13bSMingming Cao ext4_journal_stop(handle); 5136c2155b9SDjalal Harouni 5146c2155b9SDjalal Harouni unlock_out: 5156c2155b9SDjalal Harouni mutex_unlock(&inode->i_mutex); 51642a74f20SDave Hansen setversion_out: 5172a79f17eSAl Viro mnt_drop_write_file(filp); 518ac27a0ecSDave Kleikamp return err; 519ac27a0ecSDave Kleikamp } 520617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 521617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 522ac046f1dSPeng Tao int err, err2=0; 523ac27a0ecSDave Kleikamp 5248f82f840SYongqiang Yang err = ext4_resize_begin(sb); 5258f82f840SYongqiang Yang if (err) 5268f82f840SYongqiang Yang return err; 527ac27a0ecSDave Kleikamp 528014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 529014a1770SDjalal Harouni err = -EFAULT; 530014a1770SDjalal Harouni goto group_extend_out; 531014a1770SDjalal Harouni } 532ac27a0ecSDave Kleikamp 533e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 534bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 535bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 536014a1770SDjalal Harouni err = -EOPNOTSUPP; 537014a1770SDjalal Harouni goto group_extend_out; 538bab08ab9STheodore Ts'o } 539bab08ab9STheodore Ts'o 540a561be71SAl Viro err = mnt_want_write_file(filp); 54142a74f20SDave Hansen if (err) 542014a1770SDjalal Harouni goto group_extend_out; 54342a74f20SDave Hansen 544617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 545ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 546dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 5477ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 548dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 549ac046f1dSPeng Tao } 5507ffe1ea8SHidehiro Kawai if (err == 0) 5517ffe1ea8SHidehiro Kawai err = err2; 5522a79f17eSAl Viro mnt_drop_write_file(filp); 553014a1770SDjalal Harouni group_extend_out: 5548f82f840SYongqiang Yang ext4_resize_end(sb); 555ac27a0ecSDave Kleikamp return err; 556ac27a0ecSDave Kleikamp } 557748de673SAkira Fujita 558748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 559748de673SAkira Fujita struct move_extent me; 5602903ff01SAl Viro struct fd donor; 5612903ff01SAl Viro int err; 562748de673SAkira Fujita 5634a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 5644a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 5654a58579bSAkira Fujita return -EBADF; 5664a58579bSAkira Fujita 567748de673SAkira Fujita if (copy_from_user(&me, 568748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 569748de673SAkira Fujita return -EFAULT; 5704a58579bSAkira Fujita me.moved_len = 0; 571748de673SAkira Fujita 5722903ff01SAl Viro donor = fdget(me.donor_fd); 5732903ff01SAl Viro if (!donor.file) 574748de673SAkira Fujita return -EBADF; 575748de673SAkira Fujita 5762903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 5774a58579bSAkira Fujita err = -EBADF; 5784a58579bSAkira Fujita goto mext_out; 579748de673SAkira Fujita } 580748de673SAkira Fujita 581e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 582bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 583bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 584399c9b86SAl Viro err = -EOPNOTSUPP; 585399c9b86SAl Viro goto mext_out; 586bab08ab9STheodore Ts'o } 587bab08ab9STheodore Ts'o 588a561be71SAl Viro err = mnt_want_write_file(filp); 5894a58579bSAkira Fujita if (err) 5904a58579bSAkira Fujita goto mext_out; 5914a58579bSAkira Fujita 5922903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 593748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 5942a79f17eSAl Viro mnt_drop_write_file(filp); 595748de673SAkira Fujita 596c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 597c437b273SAkira Fujita &me, sizeof(me))) 5984a58579bSAkira Fujita err = -EFAULT; 5994a58579bSAkira Fujita mext_out: 6002903ff01SAl Viro fdput(donor); 601748de673SAkira Fujita return err; 602748de673SAkira Fujita } 603748de673SAkira Fujita 604617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 605617ba13bSMingming Cao struct ext4_new_group_data input; 606ac046f1dSPeng Tao int err, err2=0; 607ac27a0ecSDave Kleikamp 6088f82f840SYongqiang Yang err = ext4_resize_begin(sb); 6098f82f840SYongqiang Yang if (err) 6108f82f840SYongqiang Yang return err; 611ac27a0ecSDave Kleikamp 612617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 613014a1770SDjalal Harouni sizeof(input))) { 614014a1770SDjalal Harouni err = -EFAULT; 615014a1770SDjalal Harouni goto group_add_out; 616014a1770SDjalal Harouni } 617ac27a0ecSDave Kleikamp 618e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 619bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 620bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 621014a1770SDjalal Harouni err = -EOPNOTSUPP; 622014a1770SDjalal Harouni goto group_add_out; 623bab08ab9STheodore Ts'o } 624bab08ab9STheodore Ts'o 625a561be71SAl Viro err = mnt_want_write_file(filp); 62642a74f20SDave Hansen if (err) 627014a1770SDjalal Harouni goto group_add_out; 62842a74f20SDave Hansen 629617ba13bSMingming Cao err = ext4_group_add(sb, &input); 630ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 631dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 6327ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 633dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 634ac046f1dSPeng Tao } 6357ffe1ea8SHidehiro Kawai if (err == 0) 6367ffe1ea8SHidehiro Kawai err = err2; 6372a79f17eSAl Viro mnt_drop_write_file(filp); 6387f511862STheodore Ts'o if (!err && ext4_has_group_desc_csum(sb) && 6397f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 6407f511862STheodore Ts'o err = ext4_register_li_request(sb, input.group); 641014a1770SDjalal Harouni group_add_out: 6428f82f840SYongqiang Yang ext4_resize_end(sb); 643ac27a0ecSDave Kleikamp return err; 644ac27a0ecSDave Kleikamp } 645ac27a0ecSDave Kleikamp 646c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 6472a43a878SAneesh Kumar K.V { 6482a43a878SAneesh Kumar K.V int err; 6492e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 6502a43a878SAneesh Kumar K.V return -EACCES; 6512a43a878SAneesh Kumar K.V 652a561be71SAl Viro err = mnt_want_write_file(filp); 6532a43a878SAneesh Kumar K.V if (err) 6542a43a878SAneesh Kumar K.V return err; 6552a43a878SAneesh Kumar K.V /* 6562a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 6572a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 6582a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 6592a43a878SAneesh Kumar K.V * inode format to prevent read. 6602a43a878SAneesh Kumar K.V */ 6612a43a878SAneesh Kumar K.V mutex_lock(&(inode->i_mutex)); 6622a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 6632a43a878SAneesh Kumar K.V mutex_unlock(&(inode->i_mutex)); 6642a79f17eSAl Viro mnt_drop_write_file(filp); 6652a43a878SAneesh Kumar K.V return err; 6662a43a878SAneesh Kumar K.V } 667c14c6fd5SAneesh Kumar K.V 668ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 669ccd2506bSTheodore Ts'o { 670ccd2506bSTheodore Ts'o int err; 6712e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 672ccd2506bSTheodore Ts'o return -EACCES; 673ccd2506bSTheodore Ts'o 674a561be71SAl Viro err = mnt_want_write_file(filp); 675ccd2506bSTheodore Ts'o if (err) 676ccd2506bSTheodore Ts'o return err; 677ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 6782a79f17eSAl Viro mnt_drop_write_file(filp); 679ccd2506bSTheodore Ts'o return err; 680ccd2506bSTheodore Ts'o } 681ccd2506bSTheodore Ts'o 682393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 6833e67cfadSDmitry Monakhov { 6843e67cfadSDmitry Monakhov int err; 685393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 686393d1d1dSDr. Tilmann Bubeck return -EBADF; 6873e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 6883e67cfadSDmitry Monakhov if (err) 6893e67cfadSDmitry Monakhov return err; 6903e67cfadSDmitry Monakhov err = swap_inode_boot_loader(sb, inode); 6913e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 6923e67cfadSDmitry Monakhov return err; 6933e67cfadSDmitry Monakhov } 694393d1d1dSDr. Tilmann Bubeck 69519c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 69619c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 69719c5246dSYongqiang Yang int err = 0, err2 = 0; 6987f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 69919c5246dSYongqiang Yang 700e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 70119c5246dSYongqiang Yang ext4_msg(sb, KERN_ERR, 70219c5246dSYongqiang Yang "Online resizing not (yet) supported with bigalloc"); 70319c5246dSYongqiang Yang return -EOPNOTSUPP; 70419c5246dSYongqiang Yang } 70519c5246dSYongqiang Yang 70619c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 70719c5246dSYongqiang Yang sizeof(__u64))) { 70819c5246dSYongqiang Yang return -EFAULT; 70919c5246dSYongqiang Yang } 71019c5246dSYongqiang Yang 71119c5246dSYongqiang Yang err = ext4_resize_begin(sb); 71219c5246dSYongqiang Yang if (err) 71319c5246dSYongqiang Yang return err; 71419c5246dSYongqiang Yang 7158cae6f71SAl Viro err = mnt_want_write_file(filp); 71619c5246dSYongqiang Yang if (err) 71719c5246dSYongqiang Yang goto resizefs_out; 71819c5246dSYongqiang Yang 71919c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 72019c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 72119c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 72219c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 72319c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 72419c5246dSYongqiang Yang } 72519c5246dSYongqiang Yang if (err == 0) 72619c5246dSYongqiang Yang err = err2; 7278cae6f71SAl Viro mnt_drop_write_file(filp); 7287f511862STheodore Ts'o if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && 7297f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 7307f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 7317f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 7327f511862STheodore Ts'o 73319c5246dSYongqiang Yang resizefs_out: 73419c5246dSYongqiang Yang ext4_resize_end(sb); 73519c5246dSYongqiang Yang return err; 73619c5246dSYongqiang Yang } 73719c5246dSYongqiang Yang 738e681c047SLukas Czerner case FITRIM: 739e681c047SLukas Czerner { 74041431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 741e681c047SLukas Czerner struct fstrim_range range; 742e681c047SLukas Czerner int ret = 0; 743e681c047SLukas Czerner 744e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 745e681c047SLukas Czerner return -EPERM; 746e681c047SLukas Czerner 74741431792SLukas Czerner if (!blk_queue_discard(q)) 74841431792SLukas Czerner return -EOPNOTSUPP; 74941431792SLukas Czerner 750e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 751e681c047SLukas Czerner sizeof(range))) 752e681c047SLukas Czerner return -EFAULT; 753e681c047SLukas Czerner 7545c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 7555c2ed62fSLukas Czerner q->limits.discard_granularity); 756e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 757e681c047SLukas Czerner if (ret < 0) 758e681c047SLukas Czerner return ret; 759e681c047SLukas Czerner 760e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 761e681c047SLukas Czerner sizeof(range))) 762e681c047SLukas Czerner return -EFAULT; 763e681c047SLukas Czerner 764e681c047SLukas Czerner return 0; 765e681c047SLukas Czerner } 7667869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 7677869a4a6STheodore Ts'o return ext4_ext_precache(inode); 7689bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: { 7699bd8212fSMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 7709bd8212fSMichael Halcrow struct ext4_encryption_policy policy; 7719bd8212fSMichael Halcrow int err = 0; 772e681c047SLukas Czerner 7739bd8212fSMichael Halcrow if (copy_from_user(&policy, 7749bd8212fSMichael Halcrow (struct ext4_encryption_policy __user *)arg, 7759bd8212fSMichael Halcrow sizeof(policy))) { 7769bd8212fSMichael Halcrow err = -EFAULT; 7779bd8212fSMichael Halcrow goto encryption_policy_out; 7789bd8212fSMichael Halcrow } 7799bd8212fSMichael Halcrow 7809bd8212fSMichael Halcrow err = ext4_process_policy(&policy, inode); 7819bd8212fSMichael Halcrow encryption_policy_out: 7829bd8212fSMichael Halcrow return err; 7839bd8212fSMichael Halcrow #else 7849bd8212fSMichael Halcrow return -EOPNOTSUPP; 7859bd8212fSMichael Halcrow #endif 7869bd8212fSMichael Halcrow } 7879bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: { 7889bd8212fSMichael Halcrow int err, err2; 7899bd8212fSMichael Halcrow struct ext4_sb_info *sbi = EXT4_SB(sb); 7909bd8212fSMichael Halcrow handle_t *handle; 7919bd8212fSMichael Halcrow 7929bd8212fSMichael Halcrow if (!ext4_sb_has_crypto(sb)) 7939bd8212fSMichael Halcrow return -EOPNOTSUPP; 7949bd8212fSMichael Halcrow if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { 7959bd8212fSMichael Halcrow err = mnt_want_write_file(filp); 7969bd8212fSMichael Halcrow if (err) 7979bd8212fSMichael Halcrow return err; 7989bd8212fSMichael Halcrow handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 7999bd8212fSMichael Halcrow if (IS_ERR(handle)) { 8009bd8212fSMichael Halcrow err = PTR_ERR(handle); 8019bd8212fSMichael Halcrow goto pwsalt_err_exit; 8029bd8212fSMichael Halcrow } 8039bd8212fSMichael Halcrow err = ext4_journal_get_write_access(handle, sbi->s_sbh); 8049bd8212fSMichael Halcrow if (err) 8059bd8212fSMichael Halcrow goto pwsalt_err_journal; 8069bd8212fSMichael Halcrow generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); 8079bd8212fSMichael Halcrow err = ext4_handle_dirty_metadata(handle, NULL, 8089bd8212fSMichael Halcrow sbi->s_sbh); 8099bd8212fSMichael Halcrow pwsalt_err_journal: 8109bd8212fSMichael Halcrow err2 = ext4_journal_stop(handle); 8119bd8212fSMichael Halcrow if (err2 && !err) 8129bd8212fSMichael Halcrow err = err2; 8139bd8212fSMichael Halcrow pwsalt_err_exit: 8149bd8212fSMichael Halcrow mnt_drop_write_file(filp); 8159bd8212fSMichael Halcrow if (err) 8169bd8212fSMichael Halcrow return err; 8179bd8212fSMichael Halcrow } 818b4ab9e29SFabian Frederick if (copy_to_user((void __user *) arg, 819b4ab9e29SFabian Frederick sbi->s_es->s_encrypt_pw_salt, 16)) 8209bd8212fSMichael Halcrow return -EFAULT; 8219bd8212fSMichael Halcrow return 0; 8229bd8212fSMichael Halcrow } 8239bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: { 8249bd8212fSMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 8259bd8212fSMichael Halcrow struct ext4_encryption_policy policy; 8269bd8212fSMichael Halcrow int err = 0; 8279bd8212fSMichael Halcrow 8289bd8212fSMichael Halcrow if (!ext4_encrypted_inode(inode)) 8299bd8212fSMichael Halcrow return -ENOENT; 8309bd8212fSMichael Halcrow err = ext4_get_policy(inode, &policy); 8319bd8212fSMichael Halcrow if (err) 8329bd8212fSMichael Halcrow return err; 833b4ab9e29SFabian Frederick if (copy_to_user((void __user *)arg, &policy, sizeof(policy))) 8349bd8212fSMichael Halcrow return -EFAULT; 8359bd8212fSMichael Halcrow return 0; 8369bd8212fSMichael Halcrow #else 8379bd8212fSMichael Halcrow return -EOPNOTSUPP; 8389bd8212fSMichael Halcrow #endif 8399bd8212fSMichael Halcrow } 8409b7365fcSLi Xi case EXT4_IOC_FSGETXATTR: 8419b7365fcSLi Xi { 8429b7365fcSLi Xi struct fsxattr fa; 8439b7365fcSLi Xi 8449b7365fcSLi Xi memset(&fa, 0, sizeof(struct fsxattr)); 8459b7365fcSLi Xi ext4_get_inode_flags(ei); 8469b7365fcSLi Xi fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); 8479b7365fcSLi Xi 8489b7365fcSLi Xi if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, 8499b7365fcSLi Xi EXT4_FEATURE_RO_COMPAT_PROJECT)) { 8509b7365fcSLi Xi fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, 8519b7365fcSLi Xi EXT4_I(inode)->i_projid); 8529b7365fcSLi Xi } 8539b7365fcSLi Xi 8549b7365fcSLi Xi if (copy_to_user((struct fsxattr __user *)arg, 8559b7365fcSLi Xi &fa, sizeof(fa))) 8569b7365fcSLi Xi return -EFAULT; 8579b7365fcSLi Xi return 0; 8589b7365fcSLi Xi } 8599b7365fcSLi Xi case EXT4_IOC_FSSETXATTR: 8609b7365fcSLi Xi { 8619b7365fcSLi Xi struct fsxattr fa; 8629b7365fcSLi Xi int err; 8639b7365fcSLi Xi 8649b7365fcSLi Xi if (copy_from_user(&fa, (struct fsxattr __user *)arg, 8659b7365fcSLi Xi sizeof(fa))) 8669b7365fcSLi Xi return -EFAULT; 8679b7365fcSLi Xi 8689b7365fcSLi Xi /* Make sure caller has proper permission */ 8699b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 8709b7365fcSLi Xi return -EACCES; 8719b7365fcSLi Xi 8729b7365fcSLi Xi err = mnt_want_write_file(filp); 8739b7365fcSLi Xi if (err) 8749b7365fcSLi Xi return err; 8759b7365fcSLi Xi 8769b7365fcSLi Xi flags = ext4_xflags_to_iflags(fa.fsx_xflags); 8779b7365fcSLi Xi flags = ext4_mask_flags(inode->i_mode, flags); 8789b7365fcSLi Xi 8799b7365fcSLi Xi mutex_lock(&inode->i_mutex); 8809b7365fcSLi Xi flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | 8819b7365fcSLi Xi (flags & EXT4_FL_XFLAG_VISIBLE); 8829b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 8839b7365fcSLi Xi mutex_unlock(&inode->i_mutex); 8849b7365fcSLi Xi mnt_drop_write_file(filp); 8859b7365fcSLi Xi if (err) 8869b7365fcSLi Xi return err; 8879b7365fcSLi Xi 8889b7365fcSLi Xi err = ext4_ioctl_setproject(filp, fa.fsx_projid); 8899b7365fcSLi Xi if (err) 8909b7365fcSLi Xi return err; 8919b7365fcSLi Xi 8929b7365fcSLi Xi return 0; 8939b7365fcSLi Xi } 894ac27a0ecSDave Kleikamp default: 895ac27a0ecSDave Kleikamp return -ENOTTY; 896ac27a0ecSDave Kleikamp } 897ac27a0ecSDave Kleikamp } 898ac27a0ecSDave Kleikamp 899ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 900617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 901ac27a0ecSDave Kleikamp { 902ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 903ac27a0ecSDave Kleikamp switch (cmd) { 904617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 905617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 906ac27a0ecSDave Kleikamp break; 907617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 908617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 909ac27a0ecSDave Kleikamp break; 910617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 911617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 912ac27a0ecSDave Kleikamp break; 913617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 914617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 915ac27a0ecSDave Kleikamp break; 916617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 917617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 918ac27a0ecSDave Kleikamp break; 919617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 920617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 921ac27a0ecSDave Kleikamp break; 922617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 923617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 924ac27a0ecSDave Kleikamp break; 925617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 926617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 927ac27a0ecSDave Kleikamp break; 928617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 929617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 930ac27a0ecSDave Kleikamp break; 9314d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 9324d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 9334d92dc0fSBen Hutchings struct ext4_new_group_input input; 9344d92dc0fSBen Hutchings mm_segment_t old_fs; 9354d92dc0fSBen Hutchings int err; 9364d92dc0fSBen Hutchings 9374d92dc0fSBen Hutchings uinput = compat_ptr(arg); 9384d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 9394d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 9404d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 9414d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 9424d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 9434d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 9444d92dc0fSBen Hutchings &uinput->reserved_blocks); 9454d92dc0fSBen Hutchings if (err) 9464d92dc0fSBen Hutchings return -EFAULT; 9474d92dc0fSBen Hutchings old_fs = get_fs(); 9484d92dc0fSBen Hutchings set_fs(KERNEL_DS); 9494d92dc0fSBen Hutchings err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 9504d92dc0fSBen Hutchings (unsigned long) &input); 9514d92dc0fSBen Hutchings set_fs(old_fs); 9524d92dc0fSBen Hutchings return err; 9534d92dc0fSBen Hutchings } 954b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 95519c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 9567869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 9579bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: 9589bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: 9599bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: 960b684b2eeSChristian Borntraeger break; 961ac27a0ecSDave Kleikamp default: 962ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 963ac27a0ecSDave Kleikamp } 9645cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 965ac27a0ecSDave Kleikamp } 966ac27a0ecSDave Kleikamp #endif 967