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> 169b7365fcSLi Xi #include <linux/quotaops.h> 178da4b8c4SAndy Shevchenko #include <linux/uuid.h> 18ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 193dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 203dcf5451SChristoph Hellwig #include "ext4.h" 21ac27a0ecSDave Kleikamp 22393d1d1dSDr. Tilmann Bubeck /** 23393d1d1dSDr. Tilmann Bubeck * Swap memory between @a and @b for @len bytes. 24393d1d1dSDr. Tilmann Bubeck * 25393d1d1dSDr. Tilmann Bubeck * @a: pointer to first memory area 26393d1d1dSDr. Tilmann Bubeck * @b: pointer to second memory area 27393d1d1dSDr. Tilmann Bubeck * @len: number of bytes to swap 28393d1d1dSDr. Tilmann Bubeck * 29393d1d1dSDr. Tilmann Bubeck */ 30393d1d1dSDr. Tilmann Bubeck static void memswap(void *a, void *b, size_t len) 31393d1d1dSDr. Tilmann Bubeck { 32393d1d1dSDr. Tilmann Bubeck unsigned char *ap, *bp; 33393d1d1dSDr. Tilmann Bubeck 34393d1d1dSDr. Tilmann Bubeck ap = (unsigned char *)a; 35393d1d1dSDr. Tilmann Bubeck bp = (unsigned char *)b; 36393d1d1dSDr. Tilmann Bubeck while (len-- > 0) { 374b7e2db5SFabian Frederick swap(*ap, *bp); 38393d1d1dSDr. Tilmann Bubeck ap++; 39393d1d1dSDr. Tilmann Bubeck bp++; 40393d1d1dSDr. Tilmann Bubeck } 41393d1d1dSDr. Tilmann Bubeck } 42393d1d1dSDr. Tilmann Bubeck 43393d1d1dSDr. Tilmann Bubeck /** 44393d1d1dSDr. Tilmann Bubeck * Swap i_data and associated attributes between @inode1 and @inode2. 45393d1d1dSDr. Tilmann Bubeck * This function is used for the primary swap between inode1 and inode2 46393d1d1dSDr. Tilmann Bubeck * and also to revert this primary swap in case of errors. 47393d1d1dSDr. Tilmann Bubeck * 48393d1d1dSDr. Tilmann Bubeck * Therefore you have to make sure, that calling this method twice 49393d1d1dSDr. Tilmann Bubeck * will revert all changes. 50393d1d1dSDr. Tilmann Bubeck * 51393d1d1dSDr. Tilmann Bubeck * @inode1: pointer to first inode 52393d1d1dSDr. Tilmann Bubeck * @inode2: pointer to second inode 53393d1d1dSDr. Tilmann Bubeck */ 54393d1d1dSDr. Tilmann Bubeck static void swap_inode_data(struct inode *inode1, struct inode *inode2) 55393d1d1dSDr. Tilmann Bubeck { 56393d1d1dSDr. Tilmann Bubeck loff_t isize; 57393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei1; 58393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei2; 59393d1d1dSDr. Tilmann Bubeck 60393d1d1dSDr. Tilmann Bubeck ei1 = EXT4_I(inode1); 61393d1d1dSDr. Tilmann Bubeck ei2 = EXT4_I(inode2); 62393d1d1dSDr. Tilmann Bubeck 63393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); 64393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_version, &inode2->i_version, 65393d1d1dSDr. Tilmann Bubeck sizeof(inode1->i_version)); 66393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_blocks, &inode2->i_blocks, 67393d1d1dSDr. Tilmann Bubeck sizeof(inode1->i_blocks)); 68393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); 69393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); 70393d1d1dSDr. Tilmann Bubeck memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); 71393d1d1dSDr. Tilmann Bubeck 72393d1d1dSDr. Tilmann Bubeck memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); 73393d1d1dSDr. Tilmann Bubeck memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); 74393d1d1dSDr. Tilmann Bubeck memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); 75cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); 76cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); 77393d1d1dSDr. Tilmann Bubeck 78393d1d1dSDr. Tilmann Bubeck isize = i_size_read(inode1); 79393d1d1dSDr. Tilmann Bubeck i_size_write(inode1, i_size_read(inode2)); 80393d1d1dSDr. Tilmann Bubeck i_size_write(inode2, isize); 81393d1d1dSDr. Tilmann Bubeck } 82393d1d1dSDr. Tilmann Bubeck 83393d1d1dSDr. Tilmann Bubeck /** 84393d1d1dSDr. Tilmann Bubeck * Swap the information from the given @inode and the inode 85393d1d1dSDr. Tilmann Bubeck * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 86393d1d1dSDr. Tilmann Bubeck * important fields of the inodes. 87393d1d1dSDr. Tilmann Bubeck * 88393d1d1dSDr. Tilmann Bubeck * @sb: the super block of the filesystem 89393d1d1dSDr. Tilmann Bubeck * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 90393d1d1dSDr. Tilmann Bubeck * 91393d1d1dSDr. Tilmann Bubeck */ 92393d1d1dSDr. Tilmann Bubeck static long swap_inode_boot_loader(struct super_block *sb, 93393d1d1dSDr. Tilmann Bubeck struct inode *inode) 94393d1d1dSDr. Tilmann Bubeck { 95393d1d1dSDr. Tilmann Bubeck handle_t *handle; 96393d1d1dSDr. Tilmann Bubeck int err; 97393d1d1dSDr. Tilmann Bubeck struct inode *inode_bl; 98393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei_bl; 99d7092ae2Sjon ernst struct ext4_sb_info *sbi = EXT4_SB(sb); 100393d1d1dSDr. Tilmann Bubeck 101d8558a29STheodore Ts'o if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) 102d8558a29STheodore Ts'o return -EINVAL; 103393d1d1dSDr. Tilmann Bubeck 104d8558a29STheodore Ts'o if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) 105d8558a29STheodore Ts'o return -EPERM; 106393d1d1dSDr. Tilmann Bubeck 107393d1d1dSDr. Tilmann Bubeck inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); 108d8558a29STheodore Ts'o if (IS_ERR(inode_bl)) 109d8558a29STheodore Ts'o return PTR_ERR(inode_bl); 110393d1d1dSDr. Tilmann Bubeck ei_bl = EXT4_I(inode_bl); 111393d1d1dSDr. Tilmann Bubeck 112393d1d1dSDr. Tilmann Bubeck filemap_flush(inode->i_mapping); 113393d1d1dSDr. Tilmann Bubeck filemap_flush(inode_bl->i_mapping); 114393d1d1dSDr. Tilmann Bubeck 115393d1d1dSDr. Tilmann Bubeck /* Protect orig inodes against a truncate and make sure, 116393d1d1dSDr. Tilmann Bubeck * that only 1 swap_inode_boot_loader is running. */ 117375e289eSJ. Bruce Fields lock_two_nondirectories(inode, inode_bl); 118393d1d1dSDr. Tilmann Bubeck 119393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode->i_data, 0); 120393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode_bl->i_data, 0); 121393d1d1dSDr. Tilmann Bubeck 122393d1d1dSDr. Tilmann Bubeck /* Wait for all existing dio workers */ 123393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode); 124393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode_bl); 125393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode); 126393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode_bl); 127393d1d1dSDr. Tilmann Bubeck 128393d1d1dSDr. Tilmann Bubeck handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 129393d1d1dSDr. Tilmann Bubeck if (IS_ERR(handle)) { 130393d1d1dSDr. Tilmann Bubeck err = -EINVAL; 13130d29b11SZheng Liu goto journal_err_out; 132393d1d1dSDr. Tilmann Bubeck } 133393d1d1dSDr. Tilmann Bubeck 134393d1d1dSDr. Tilmann Bubeck /* Protect extent tree against block allocations via delalloc */ 135393d1d1dSDr. Tilmann Bubeck ext4_double_down_write_data_sem(inode, inode_bl); 136393d1d1dSDr. Tilmann Bubeck 137393d1d1dSDr. Tilmann Bubeck if (inode_bl->i_nlink == 0) { 138393d1d1dSDr. Tilmann Bubeck /* this inode has never been used as a BOOT_LOADER */ 139393d1d1dSDr. Tilmann Bubeck set_nlink(inode_bl, 1); 140393d1d1dSDr. Tilmann Bubeck i_uid_write(inode_bl, 0); 141393d1d1dSDr. Tilmann Bubeck i_gid_write(inode_bl, 0); 142393d1d1dSDr. Tilmann Bubeck inode_bl->i_flags = 0; 143393d1d1dSDr. Tilmann Bubeck ei_bl->i_flags = 0; 144393d1d1dSDr. Tilmann Bubeck inode_bl->i_version = 1; 145393d1d1dSDr. Tilmann Bubeck i_size_write(inode_bl, 0); 146393d1d1dSDr. Tilmann Bubeck inode_bl->i_mode = S_IFREG; 147e2b911c5SDarrick J. Wong if (ext4_has_feature_extents(sb)) { 148393d1d1dSDr. Tilmann Bubeck ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 149393d1d1dSDr. Tilmann Bubeck ext4_ext_tree_init(handle, inode_bl); 150393d1d1dSDr. Tilmann Bubeck } else 151393d1d1dSDr. Tilmann Bubeck memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 152393d1d1dSDr. Tilmann Bubeck } 153393d1d1dSDr. Tilmann Bubeck 154393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 155393d1d1dSDr. Tilmann Bubeck 156393d1d1dSDr. Tilmann Bubeck inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); 157393d1d1dSDr. Tilmann Bubeck 158393d1d1dSDr. Tilmann Bubeck spin_lock(&sbi->s_next_gen_lock); 159393d1d1dSDr. Tilmann Bubeck inode->i_generation = sbi->s_next_generation++; 160393d1d1dSDr. Tilmann Bubeck inode_bl->i_generation = sbi->s_next_generation++; 161393d1d1dSDr. Tilmann Bubeck spin_unlock(&sbi->s_next_gen_lock); 162393d1d1dSDr. Tilmann Bubeck 163393d1d1dSDr. Tilmann Bubeck ext4_discard_preallocations(inode); 164393d1d1dSDr. Tilmann Bubeck 165393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode); 166393d1d1dSDr. Tilmann Bubeck if (err < 0) { 167393d1d1dSDr. Tilmann Bubeck ext4_warning(inode->i_sb, 168393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 169393d1d1dSDr. Tilmann Bubeck inode->i_ino, err); 170393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 171393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 172393d1d1dSDr. Tilmann Bubeck } else { 173393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode_bl); 174393d1d1dSDr. Tilmann Bubeck if (err < 0) { 175393d1d1dSDr. Tilmann Bubeck ext4_warning(inode_bl->i_sb, 176393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 177393d1d1dSDr. Tilmann Bubeck inode_bl->i_ino, err); 178393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 179393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 180393d1d1dSDr. Tilmann Bubeck ext4_mark_inode_dirty(handle, inode); 181393d1d1dSDr. Tilmann Bubeck } 182393d1d1dSDr. Tilmann Bubeck } 183393d1d1dSDr. Tilmann Bubeck ext4_journal_stop(handle); 184393d1d1dSDr. Tilmann Bubeck ext4_double_up_write_data_sem(inode, inode_bl); 185393d1d1dSDr. Tilmann Bubeck 18630d29b11SZheng Liu journal_err_out: 187393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode); 188393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode_bl); 189375e289eSJ. Bruce Fields unlock_two_nondirectories(inode, inode_bl); 190393d1d1dSDr. Tilmann Bubeck iput(inode_bl); 191393d1d1dSDr. Tilmann Bubeck return err; 192393d1d1dSDr. Tilmann Bubeck } 193393d1d1dSDr. Tilmann Bubeck 1949bd8212fSMichael Halcrow static int uuid_is_zero(__u8 u[16]) 1959bd8212fSMichael Halcrow { 1969bd8212fSMichael Halcrow int i; 1979bd8212fSMichael Halcrow 1989bd8212fSMichael Halcrow for (i = 0; i < 16; i++) 1999bd8212fSMichael Halcrow if (u[i]) 2009bd8212fSMichael Halcrow return 0; 2019bd8212fSMichael Halcrow return 1; 2029bd8212fSMichael Halcrow } 2039bd8212fSMichael Halcrow 2049b7365fcSLi Xi static int ext4_ioctl_setflags(struct inode *inode, 2059b7365fcSLi Xi unsigned int flags) 206ac27a0ecSDave Kleikamp { 207617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 208ac27a0ecSDave Kleikamp handle_t *handle = NULL; 209fdde368eSAnton Protopopov int err = -EPERM, migrate = 0; 210617ba13bSMingming Cao struct ext4_iloc iloc; 21179906964STheodore Ts'o unsigned int oldflags, mask, i; 212ac27a0ecSDave Kleikamp unsigned int jflag; 213ac27a0ecSDave Kleikamp 214e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 21542a74f20SDave Hansen if (IS_NOQUOTA(inode)) 21642a74f20SDave Hansen goto flags_out; 21742a74f20SDave Hansen 218ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 219ac27a0ecSDave Kleikamp 220ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 221617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 222ac27a0ecSDave Kleikamp 223ac27a0ecSDave Kleikamp /* 224ac27a0ecSDave Kleikamp * The IMMUTABLE and APPEND_ONLY flags can only be changed by 225ac27a0ecSDave Kleikamp * the relevant capability. 226ac27a0ecSDave Kleikamp * 227ac27a0ecSDave Kleikamp * This test looks nicer. Thanks to Pauline Middelink 228ac27a0ecSDave Kleikamp */ 229617ba13bSMingming Cao if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 23042a74f20SDave Hansen if (!capable(CAP_LINUX_IMMUTABLE)) 23142a74f20SDave Hansen goto flags_out; 232ac27a0ecSDave Kleikamp } 233ac27a0ecSDave Kleikamp 234ac27a0ecSDave Kleikamp /* 235ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 236ac27a0ecSDave Kleikamp * the relevant capability. 237ac27a0ecSDave Kleikamp */ 238617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 23942a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 24042a74f20SDave Hansen goto flags_out; 241ac27a0ecSDave Kleikamp } 242996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 2434db46fc2SAneesh Kumar K.V migrate = 1; 244ac27a0ecSDave Kleikamp 245c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 246c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 247c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 248c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 249c8d46e41SJiaying Zhang goto flags_out; 250c8d46e41SJiaying Zhang } 251c8d46e41SJiaying Zhang } else if (oldflags & EXT4_EOFBLOCKS_FL) 252c8d46e41SJiaying Zhang ext4_truncate(inode); 253c8d46e41SJiaying Zhang 2549924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 255ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 25642a74f20SDave Hansen err = PTR_ERR(handle); 25742a74f20SDave Hansen goto flags_out; 258ac27a0ecSDave Kleikamp } 259ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 2600390131bSFrank Mayhar ext4_handle_sync(handle); 261617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 262ac27a0ecSDave Kleikamp if (err) 263ac27a0ecSDave Kleikamp goto flags_err; 264ac27a0ecSDave Kleikamp 26579906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 26679906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 26779906964STheodore Ts'o continue; 26879906964STheodore Ts'o if (mask & flags) 26979906964STheodore Ts'o ext4_set_inode_flag(inode, i); 27079906964STheodore Ts'o else 27179906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 27279906964STheodore Ts'o } 273ac27a0ecSDave Kleikamp 274617ba13bSMingming Cao ext4_set_inode_flags(inode); 275ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 276ac27a0ecSDave Kleikamp 277617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 278ac27a0ecSDave Kleikamp flags_err: 279617ba13bSMingming Cao ext4_journal_stop(handle); 28042a74f20SDave Hansen if (err) 28142a74f20SDave Hansen goto flags_out; 282ac27a0ecSDave Kleikamp 283617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 284617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 2854db46fc2SAneesh Kumar K.V if (err) 2864db46fc2SAneesh Kumar K.V goto flags_out; 287996bb9fdSTheodore Ts'o if (migrate) { 288996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 2894db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 290996bb9fdSTheodore Ts'o else 291996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 292996bb9fdSTheodore Ts'o } 293996bb9fdSTheodore Ts'o 29442a74f20SDave Hansen flags_out: 2959b7365fcSLi Xi return err; 2969b7365fcSLi Xi } 2979b7365fcSLi Xi 2989b7365fcSLi Xi #ifdef CONFIG_QUOTA 2999b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 3009b7365fcSLi Xi { 3019b7365fcSLi Xi struct inode *inode = file_inode(filp); 3029b7365fcSLi Xi struct super_block *sb = inode->i_sb; 3039b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 3049b7365fcSLi Xi int err, rc; 3059b7365fcSLi Xi handle_t *handle; 3069b7365fcSLi Xi kprojid_t kprojid; 3079b7365fcSLi Xi struct ext4_iloc iloc; 3089b7365fcSLi Xi struct ext4_inode *raw_inode; 309079788d0SWang Shilong struct dquot *transfer_to[MAXQUOTAS] = { }; 3109b7365fcSLi Xi 3110b7b7779SKaho Ng if (!ext4_has_feature_project(sb)) { 3129b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 3139b7365fcSLi Xi return -EOPNOTSUPP; 3149b7365fcSLi Xi else 3159b7365fcSLi Xi return 0; 3169b7365fcSLi Xi } 3179b7365fcSLi Xi 3189b7365fcSLi Xi if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 3199b7365fcSLi Xi return -EOPNOTSUPP; 3209b7365fcSLi Xi 3219b7365fcSLi Xi kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 3229b7365fcSLi Xi 3239b7365fcSLi Xi if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 3249b7365fcSLi Xi return 0; 3259b7365fcSLi Xi 3269b7365fcSLi Xi err = mnt_want_write_file(filp); 3279b7365fcSLi Xi if (err) 3289b7365fcSLi Xi return err; 3299b7365fcSLi Xi 3309b7365fcSLi Xi err = -EPERM; 3315955102cSAl Viro inode_lock(inode); 3329b7365fcSLi Xi /* Is it quota file? Do not allow user to mess with it */ 3339b7365fcSLi Xi if (IS_NOQUOTA(inode)) 3349b7365fcSLi Xi goto out_unlock; 3359b7365fcSLi Xi 3369b7365fcSLi Xi err = ext4_get_inode_loc(inode, &iloc); 3379b7365fcSLi Xi if (err) 3389b7365fcSLi Xi goto out_unlock; 3399b7365fcSLi Xi 3409b7365fcSLi Xi raw_inode = ext4_raw_inode(&iloc); 3419b7365fcSLi Xi if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 3429b7365fcSLi Xi err = -EOVERFLOW; 3439b7365fcSLi Xi brelse(iloc.bh); 3449b7365fcSLi Xi goto out_unlock; 3459b7365fcSLi Xi } 3469b7365fcSLi Xi brelse(iloc.bh); 3479b7365fcSLi Xi 3489b7365fcSLi Xi dquot_initialize(inode); 3499b7365fcSLi Xi 3509b7365fcSLi Xi handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 3519b7365fcSLi Xi EXT4_QUOTA_INIT_BLOCKS(sb) + 3529b7365fcSLi Xi EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 3539b7365fcSLi Xi if (IS_ERR(handle)) { 3549b7365fcSLi Xi err = PTR_ERR(handle); 3559b7365fcSLi Xi goto out_unlock; 3569b7365fcSLi Xi } 3579b7365fcSLi Xi 3589b7365fcSLi Xi err = ext4_reserve_inode_write(handle, inode, &iloc); 3599b7365fcSLi Xi if (err) 3609b7365fcSLi Xi goto out_stop; 3619b7365fcSLi Xi 3629b7365fcSLi Xi transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 363ff0bc084SSeth Forshee if (!IS_ERR(transfer_to[PRJQUOTA])) { 3649b7365fcSLi Xi err = __dquot_transfer(inode, transfer_to); 3659b7365fcSLi Xi dqput(transfer_to[PRJQUOTA]); 3669b7365fcSLi Xi if (err) 3679b7365fcSLi Xi goto out_dirty; 3689b7365fcSLi Xi } 369079788d0SWang Shilong 3709b7365fcSLi Xi EXT4_I(inode)->i_projid = kprojid; 3719b7365fcSLi Xi inode->i_ctime = ext4_current_time(inode); 3729b7365fcSLi Xi out_dirty: 3739b7365fcSLi Xi rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 3749b7365fcSLi Xi if (!err) 3759b7365fcSLi Xi err = rc; 3769b7365fcSLi Xi out_stop: 3779b7365fcSLi Xi ext4_journal_stop(handle); 3789b7365fcSLi Xi out_unlock: 3795955102cSAl Viro inode_unlock(inode); 3809b7365fcSLi Xi mnt_drop_write_file(filp); 3819b7365fcSLi Xi return err; 3829b7365fcSLi Xi } 3839b7365fcSLi Xi #else 3849b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 3859b7365fcSLi Xi { 3869b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 3879b7365fcSLi Xi return -EOPNOTSUPP; 3889b7365fcSLi Xi return 0; 3899b7365fcSLi Xi } 3909b7365fcSLi Xi #endif 3919b7365fcSLi Xi 3929b7365fcSLi Xi /* Transfer internal flags to xflags */ 3939b7365fcSLi Xi static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) 3949b7365fcSLi Xi { 3959b7365fcSLi Xi __u32 xflags = 0; 3969b7365fcSLi Xi 3979b7365fcSLi Xi if (iflags & EXT4_SYNC_FL) 3989b7365fcSLi Xi xflags |= FS_XFLAG_SYNC; 3999b7365fcSLi Xi if (iflags & EXT4_IMMUTABLE_FL) 4009b7365fcSLi Xi xflags |= FS_XFLAG_IMMUTABLE; 4019b7365fcSLi Xi if (iflags & EXT4_APPEND_FL) 4029b7365fcSLi Xi xflags |= FS_XFLAG_APPEND; 4039b7365fcSLi Xi if (iflags & EXT4_NODUMP_FL) 4049b7365fcSLi Xi xflags |= FS_XFLAG_NODUMP; 4059b7365fcSLi Xi if (iflags & EXT4_NOATIME_FL) 4069b7365fcSLi Xi xflags |= FS_XFLAG_NOATIME; 4079b7365fcSLi Xi if (iflags & EXT4_PROJINHERIT_FL) 4089b7365fcSLi Xi xflags |= FS_XFLAG_PROJINHERIT; 4099b7365fcSLi Xi return xflags; 4109b7365fcSLi Xi } 4119b7365fcSLi Xi 4129b7365fcSLi Xi /* Transfer xflags flags to internal */ 4139b7365fcSLi Xi static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) 4149b7365fcSLi Xi { 4159b7365fcSLi Xi unsigned long iflags = 0; 4169b7365fcSLi Xi 4179b7365fcSLi Xi if (xflags & FS_XFLAG_SYNC) 4189b7365fcSLi Xi iflags |= EXT4_SYNC_FL; 4199b7365fcSLi Xi if (xflags & FS_XFLAG_IMMUTABLE) 4209b7365fcSLi Xi iflags |= EXT4_IMMUTABLE_FL; 4219b7365fcSLi Xi if (xflags & FS_XFLAG_APPEND) 4229b7365fcSLi Xi iflags |= EXT4_APPEND_FL; 4239b7365fcSLi Xi if (xflags & FS_XFLAG_NODUMP) 4249b7365fcSLi Xi iflags |= EXT4_NODUMP_FL; 4259b7365fcSLi Xi if (xflags & FS_XFLAG_NOATIME) 4269b7365fcSLi Xi iflags |= EXT4_NOATIME_FL; 4279b7365fcSLi Xi if (xflags & FS_XFLAG_PROJINHERIT) 4289b7365fcSLi Xi iflags |= EXT4_PROJINHERIT_FL; 4299b7365fcSLi Xi 4309b7365fcSLi Xi return iflags; 4319b7365fcSLi Xi } 4329b7365fcSLi Xi 4339b7365fcSLi Xi long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 4349b7365fcSLi Xi { 4359b7365fcSLi Xi struct inode *inode = file_inode(filp); 4369b7365fcSLi Xi struct super_block *sb = inode->i_sb; 4379b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 4389b7365fcSLi Xi unsigned int flags; 4399b7365fcSLi Xi 4409b7365fcSLi Xi ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 4419b7365fcSLi Xi 4429b7365fcSLi Xi switch (cmd) { 4439b7365fcSLi Xi case EXT4_IOC_GETFLAGS: 4449b7365fcSLi Xi ext4_get_inode_flags(ei); 4459b7365fcSLi Xi flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 4469b7365fcSLi Xi return put_user(flags, (int __user *) arg); 4479b7365fcSLi Xi case EXT4_IOC_SETFLAGS: { 4489b7365fcSLi Xi int err; 4499b7365fcSLi Xi 4509b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 4519b7365fcSLi Xi return -EACCES; 4529b7365fcSLi Xi 4539b7365fcSLi Xi if (get_user(flags, (int __user *) arg)) 4549b7365fcSLi Xi return -EFAULT; 4559b7365fcSLi Xi 4569b7365fcSLi Xi err = mnt_want_write_file(filp); 4579b7365fcSLi Xi if (err) 4589b7365fcSLi Xi return err; 4599b7365fcSLi Xi 4609b7365fcSLi Xi flags = ext4_mask_flags(inode->i_mode, flags); 4619b7365fcSLi Xi 4625955102cSAl Viro inode_lock(inode); 4639b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 4645955102cSAl Viro inode_unlock(inode); 4652a79f17eSAl Viro mnt_drop_write_file(filp); 466ac27a0ecSDave Kleikamp return err; 467ac27a0ecSDave Kleikamp } 468617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 469617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 470ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 471617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 472617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 473ac27a0ecSDave Kleikamp handle_t *handle; 474617ba13bSMingming Cao struct ext4_iloc iloc; 475ac27a0ecSDave Kleikamp __u32 generation; 476ac27a0ecSDave Kleikamp int err; 477ac27a0ecSDave Kleikamp 4782e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 479ac27a0ecSDave Kleikamp return -EPERM; 48042a74f20SDave Hansen 4819aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 482814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 483814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 484814525f4SDarrick J. Wong return -ENOTTY; 485814525f4SDarrick J. Wong } 486814525f4SDarrick J. Wong 487a561be71SAl Viro err = mnt_want_write_file(filp); 48842a74f20SDave Hansen if (err) 48942a74f20SDave Hansen return err; 49042a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 49142a74f20SDave Hansen err = -EFAULT; 49242a74f20SDave Hansen goto setversion_out; 49342a74f20SDave Hansen } 494ac27a0ecSDave Kleikamp 4955955102cSAl Viro inode_lock(inode); 4969924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 49742a74f20SDave Hansen if (IS_ERR(handle)) { 49842a74f20SDave Hansen err = PTR_ERR(handle); 4996c2155b9SDjalal Harouni goto unlock_out; 50042a74f20SDave Hansen } 501617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 502ac27a0ecSDave Kleikamp if (err == 0) { 503ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 504ac27a0ecSDave Kleikamp inode->i_generation = generation; 505617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 506ac27a0ecSDave Kleikamp } 507617ba13bSMingming Cao ext4_journal_stop(handle); 5086c2155b9SDjalal Harouni 5096c2155b9SDjalal Harouni unlock_out: 5105955102cSAl Viro inode_unlock(inode); 51142a74f20SDave Hansen setversion_out: 5122a79f17eSAl Viro mnt_drop_write_file(filp); 513ac27a0ecSDave Kleikamp return err; 514ac27a0ecSDave Kleikamp } 515617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 516617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 517ac046f1dSPeng Tao int err, err2=0; 518ac27a0ecSDave Kleikamp 5198f82f840SYongqiang Yang err = ext4_resize_begin(sb); 5208f82f840SYongqiang Yang if (err) 5218f82f840SYongqiang Yang return err; 522ac27a0ecSDave Kleikamp 523014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 524014a1770SDjalal Harouni err = -EFAULT; 525014a1770SDjalal Harouni goto group_extend_out; 526014a1770SDjalal Harouni } 527ac27a0ecSDave Kleikamp 528e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 529bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 530bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 531014a1770SDjalal Harouni err = -EOPNOTSUPP; 532014a1770SDjalal Harouni goto group_extend_out; 533bab08ab9STheodore Ts'o } 534bab08ab9STheodore Ts'o 535a561be71SAl Viro err = mnt_want_write_file(filp); 53642a74f20SDave Hansen if (err) 537014a1770SDjalal Harouni goto group_extend_out; 53842a74f20SDave Hansen 539617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 540ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 541dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 5427ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 543dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 544ac046f1dSPeng Tao } 5457ffe1ea8SHidehiro Kawai if (err == 0) 5467ffe1ea8SHidehiro Kawai err = err2; 5472a79f17eSAl Viro mnt_drop_write_file(filp); 548014a1770SDjalal Harouni group_extend_out: 5498f82f840SYongqiang Yang ext4_resize_end(sb); 550ac27a0ecSDave Kleikamp return err; 551ac27a0ecSDave Kleikamp } 552748de673SAkira Fujita 553748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 554748de673SAkira Fujita struct move_extent me; 5552903ff01SAl Viro struct fd donor; 5562903ff01SAl Viro int err; 557748de673SAkira Fujita 5584a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 5594a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 5604a58579bSAkira Fujita return -EBADF; 5614a58579bSAkira Fujita 562748de673SAkira Fujita if (copy_from_user(&me, 563748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 564748de673SAkira Fujita return -EFAULT; 5654a58579bSAkira Fujita me.moved_len = 0; 566748de673SAkira Fujita 5672903ff01SAl Viro donor = fdget(me.donor_fd); 5682903ff01SAl Viro if (!donor.file) 569748de673SAkira Fujita return -EBADF; 570748de673SAkira Fujita 5712903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 5724a58579bSAkira Fujita err = -EBADF; 5734a58579bSAkira Fujita goto mext_out; 574748de673SAkira Fujita } 575748de673SAkira Fujita 576e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 577bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 578bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 579399c9b86SAl Viro err = -EOPNOTSUPP; 580399c9b86SAl Viro goto mext_out; 58173f34a5eSRoss Zwisler } else if (IS_DAX(inode)) { 58273f34a5eSRoss Zwisler ext4_msg(sb, KERN_ERR, 58373f34a5eSRoss Zwisler "Online defrag not supported with DAX"); 58473f34a5eSRoss Zwisler err = -EOPNOTSUPP; 58573f34a5eSRoss Zwisler 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 */ 6615955102cSAl Viro inode_lock((inode)); 6622a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 6635955102cSAl Viro inode_unlock((inode)); 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 770a7550b30SJaegeuk Kim struct fscrypt_policy policy; 771e681c047SLukas Czerner 7729a200d07SRichard Weinberger if (!ext4_has_feature_encrypt(sb)) 7739a200d07SRichard Weinberger return -EOPNOTSUPP; 7749a200d07SRichard Weinberger 7759bd8212fSMichael Halcrow if (copy_from_user(&policy, 776a7550b30SJaegeuk Kim (struct fscrypt_policy __user *)arg, 777a7550b30SJaegeuk Kim sizeof(policy))) 778a7550b30SJaegeuk Kim return -EFAULT; 779a7550b30SJaegeuk Kim return fscrypt_process_policy(inode, &policy); 7809bd8212fSMichael Halcrow #else 7819bd8212fSMichael Halcrow return -EOPNOTSUPP; 7829bd8212fSMichael Halcrow #endif 7839bd8212fSMichael Halcrow } 7849bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: { 7859bd8212fSMichael Halcrow int err, err2; 7869bd8212fSMichael Halcrow struct ext4_sb_info *sbi = EXT4_SB(sb); 7879bd8212fSMichael Halcrow handle_t *handle; 7889bd8212fSMichael Halcrow 7899bd8212fSMichael Halcrow if (!ext4_sb_has_crypto(sb)) 7909bd8212fSMichael Halcrow return -EOPNOTSUPP; 7919bd8212fSMichael Halcrow if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { 7929bd8212fSMichael Halcrow err = mnt_want_write_file(filp); 7939bd8212fSMichael Halcrow if (err) 7949bd8212fSMichael Halcrow return err; 7959bd8212fSMichael Halcrow handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 7969bd8212fSMichael Halcrow if (IS_ERR(handle)) { 7979bd8212fSMichael Halcrow err = PTR_ERR(handle); 7989bd8212fSMichael Halcrow goto pwsalt_err_exit; 7999bd8212fSMichael Halcrow } 8009bd8212fSMichael Halcrow err = ext4_journal_get_write_access(handle, sbi->s_sbh); 8019bd8212fSMichael Halcrow if (err) 8029bd8212fSMichael Halcrow goto pwsalt_err_journal; 8039bd8212fSMichael Halcrow generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); 8049bd8212fSMichael Halcrow err = ext4_handle_dirty_metadata(handle, NULL, 8059bd8212fSMichael Halcrow sbi->s_sbh); 8069bd8212fSMichael Halcrow pwsalt_err_journal: 8079bd8212fSMichael Halcrow err2 = ext4_journal_stop(handle); 8089bd8212fSMichael Halcrow if (err2 && !err) 8099bd8212fSMichael Halcrow err = err2; 8109bd8212fSMichael Halcrow pwsalt_err_exit: 8119bd8212fSMichael Halcrow mnt_drop_write_file(filp); 8129bd8212fSMichael Halcrow if (err) 8139bd8212fSMichael Halcrow return err; 8149bd8212fSMichael Halcrow } 815b4ab9e29SFabian Frederick if (copy_to_user((void __user *) arg, 816b4ab9e29SFabian Frederick sbi->s_es->s_encrypt_pw_salt, 16)) 8179bd8212fSMichael Halcrow return -EFAULT; 8189bd8212fSMichael Halcrow return 0; 8199bd8212fSMichael Halcrow } 8209bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: { 8219bd8212fSMichael Halcrow #ifdef CONFIG_EXT4_FS_ENCRYPTION 822a7550b30SJaegeuk Kim struct fscrypt_policy policy; 8239bd8212fSMichael Halcrow int err = 0; 8249bd8212fSMichael Halcrow 8259bd8212fSMichael Halcrow if (!ext4_encrypted_inode(inode)) 8269bd8212fSMichael Halcrow return -ENOENT; 827a7550b30SJaegeuk Kim err = fscrypt_get_policy(inode, &policy); 8289bd8212fSMichael Halcrow if (err) 8299bd8212fSMichael Halcrow return err; 830b4ab9e29SFabian Frederick if (copy_to_user((void __user *)arg, &policy, sizeof(policy))) 8319bd8212fSMichael Halcrow return -EFAULT; 8329bd8212fSMichael Halcrow return 0; 8339bd8212fSMichael Halcrow #else 8349bd8212fSMichael Halcrow return -EOPNOTSUPP; 8359bd8212fSMichael Halcrow #endif 8369bd8212fSMichael Halcrow } 8379b7365fcSLi Xi case EXT4_IOC_FSGETXATTR: 8389b7365fcSLi Xi { 8399b7365fcSLi Xi struct fsxattr fa; 8409b7365fcSLi Xi 8419b7365fcSLi Xi memset(&fa, 0, sizeof(struct fsxattr)); 8429b7365fcSLi Xi ext4_get_inode_flags(ei); 8439b7365fcSLi Xi fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); 8449b7365fcSLi Xi 8450b7b7779SKaho Ng if (ext4_has_feature_project(inode->i_sb)) { 8469b7365fcSLi Xi fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, 8479b7365fcSLi Xi EXT4_I(inode)->i_projid); 8489b7365fcSLi Xi } 8499b7365fcSLi Xi 8509b7365fcSLi Xi if (copy_to_user((struct fsxattr __user *)arg, 8519b7365fcSLi Xi &fa, sizeof(fa))) 8529b7365fcSLi Xi return -EFAULT; 8539b7365fcSLi Xi return 0; 8549b7365fcSLi Xi } 8559b7365fcSLi Xi case EXT4_IOC_FSSETXATTR: 8569b7365fcSLi Xi { 8579b7365fcSLi Xi struct fsxattr fa; 8589b7365fcSLi Xi int err; 8599b7365fcSLi Xi 8609b7365fcSLi Xi if (copy_from_user(&fa, (struct fsxattr __user *)arg, 8619b7365fcSLi Xi sizeof(fa))) 8629b7365fcSLi Xi return -EFAULT; 8639b7365fcSLi Xi 8649b7365fcSLi Xi /* Make sure caller has proper permission */ 8659b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 8669b7365fcSLi Xi return -EACCES; 8679b7365fcSLi Xi 8689b7365fcSLi Xi err = mnt_want_write_file(filp); 8699b7365fcSLi Xi if (err) 8709b7365fcSLi Xi return err; 8719b7365fcSLi Xi 8729b7365fcSLi Xi flags = ext4_xflags_to_iflags(fa.fsx_xflags); 8739b7365fcSLi Xi flags = ext4_mask_flags(inode->i_mode, flags); 8749b7365fcSLi Xi 8755955102cSAl Viro inode_lock(inode); 8769b7365fcSLi Xi flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | 8779b7365fcSLi Xi (flags & EXT4_FL_XFLAG_VISIBLE); 8789b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 8795955102cSAl Viro inode_unlock(inode); 8809b7365fcSLi Xi mnt_drop_write_file(filp); 8819b7365fcSLi Xi if (err) 8829b7365fcSLi Xi return err; 8839b7365fcSLi Xi 8849b7365fcSLi Xi err = ext4_ioctl_setproject(filp, fa.fsx_projid); 8859b7365fcSLi Xi if (err) 8869b7365fcSLi Xi return err; 8879b7365fcSLi Xi 8889b7365fcSLi Xi return 0; 8899b7365fcSLi Xi } 890ac27a0ecSDave Kleikamp default: 891ac27a0ecSDave Kleikamp return -ENOTTY; 892ac27a0ecSDave Kleikamp } 893ac27a0ecSDave Kleikamp } 894ac27a0ecSDave Kleikamp 895ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 896617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 897ac27a0ecSDave Kleikamp { 898ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 899ac27a0ecSDave Kleikamp switch (cmd) { 900617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 901617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 902ac27a0ecSDave Kleikamp break; 903617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 904617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 905ac27a0ecSDave Kleikamp break; 906617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 907617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 908ac27a0ecSDave Kleikamp break; 909617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 910617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 911ac27a0ecSDave Kleikamp break; 912617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 913617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 914ac27a0ecSDave Kleikamp break; 915617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 916617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 917ac27a0ecSDave Kleikamp break; 918617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 919617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 920ac27a0ecSDave Kleikamp break; 921617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 922617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 923ac27a0ecSDave Kleikamp break; 924617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 925617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 926ac27a0ecSDave Kleikamp break; 9274d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 9284d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 9294d92dc0fSBen Hutchings struct ext4_new_group_input input; 9304d92dc0fSBen Hutchings mm_segment_t old_fs; 9314d92dc0fSBen Hutchings int err; 9324d92dc0fSBen Hutchings 9334d92dc0fSBen Hutchings uinput = compat_ptr(arg); 9344d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 9354d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 9364d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 9374d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 9384d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 9394d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 9404d92dc0fSBen Hutchings &uinput->reserved_blocks); 9414d92dc0fSBen Hutchings if (err) 9424d92dc0fSBen Hutchings return -EFAULT; 9434d92dc0fSBen Hutchings old_fs = get_fs(); 9444d92dc0fSBen Hutchings set_fs(KERNEL_DS); 9454d92dc0fSBen Hutchings err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 9464d92dc0fSBen Hutchings (unsigned long) &input); 9474d92dc0fSBen Hutchings set_fs(old_fs); 9484d92dc0fSBen Hutchings return err; 9494d92dc0fSBen Hutchings } 950b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 95119c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 9527869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 9539bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: 9549bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: 9559bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: 956b684b2eeSChristian Borntraeger break; 957ac27a0ecSDave Kleikamp default: 958ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 959ac27a0ecSDave Kleikamp } 9605cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 961ac27a0ecSDave Kleikamp } 962ac27a0ecSDave Kleikamp #endif 963