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> 11dab291afSMingming Cao #include <linux/jbd2.h> 12ac27a0ecSDave Kleikamp #include <linux/capability.h> 13ac27a0ecSDave Kleikamp #include <linux/time.h> 14ac27a0ecSDave Kleikamp #include <linux/compat.h> 1542a74f20SDave Hansen #include <linux/mount.h> 16748de673SAkira Fujita #include <linux/file.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); 81cde2d7a7STheodore Ts'o ext4_es_lru_del(inode1); 82cde2d7a7STheodore Ts'o ext4_es_lru_del(inode2); 83393d1d1dSDr. Tilmann Bubeck 84393d1d1dSDr. Tilmann Bubeck isize = i_size_read(inode1); 85393d1d1dSDr. Tilmann Bubeck i_size_write(inode1, i_size_read(inode2)); 86393d1d1dSDr. Tilmann Bubeck i_size_write(inode2, isize); 87393d1d1dSDr. Tilmann Bubeck } 88393d1d1dSDr. Tilmann Bubeck 89393d1d1dSDr. Tilmann Bubeck /** 90393d1d1dSDr. Tilmann Bubeck * Swap the information from the given @inode and the inode 91393d1d1dSDr. Tilmann Bubeck * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 92393d1d1dSDr. Tilmann Bubeck * important fields of the inodes. 93393d1d1dSDr. Tilmann Bubeck * 94393d1d1dSDr. Tilmann Bubeck * @sb: the super block of the filesystem 95393d1d1dSDr. Tilmann Bubeck * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 96393d1d1dSDr. Tilmann Bubeck * 97393d1d1dSDr. Tilmann Bubeck */ 98393d1d1dSDr. Tilmann Bubeck static long swap_inode_boot_loader(struct super_block *sb, 99393d1d1dSDr. Tilmann Bubeck struct inode *inode) 100393d1d1dSDr. Tilmann Bubeck { 101393d1d1dSDr. Tilmann Bubeck handle_t *handle; 102393d1d1dSDr. Tilmann Bubeck int err; 103393d1d1dSDr. Tilmann Bubeck struct inode *inode_bl; 104393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei_bl; 105d7092ae2Sjon ernst struct ext4_sb_info *sbi = EXT4_SB(sb); 106393d1d1dSDr. Tilmann Bubeck 107d8558a29STheodore Ts'o if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) 108d8558a29STheodore Ts'o return -EINVAL; 109393d1d1dSDr. Tilmann Bubeck 110d8558a29STheodore Ts'o if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) 111d8558a29STheodore Ts'o return -EPERM; 112393d1d1dSDr. Tilmann Bubeck 113393d1d1dSDr. Tilmann Bubeck inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); 114d8558a29STheodore Ts'o if (IS_ERR(inode_bl)) 115d8558a29STheodore Ts'o return PTR_ERR(inode_bl); 116393d1d1dSDr. Tilmann Bubeck ei_bl = EXT4_I(inode_bl); 117393d1d1dSDr. Tilmann Bubeck 118393d1d1dSDr. Tilmann Bubeck filemap_flush(inode->i_mapping); 119393d1d1dSDr. Tilmann Bubeck filemap_flush(inode_bl->i_mapping); 120393d1d1dSDr. Tilmann Bubeck 121393d1d1dSDr. Tilmann Bubeck /* Protect orig inodes against a truncate and make sure, 122393d1d1dSDr. Tilmann Bubeck * that only 1 swap_inode_boot_loader is running. */ 123375e289eSJ. Bruce Fields lock_two_nondirectories(inode, inode_bl); 124393d1d1dSDr. Tilmann Bubeck 125393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode->i_data, 0); 126393d1d1dSDr. Tilmann Bubeck truncate_inode_pages(&inode_bl->i_data, 0); 127393d1d1dSDr. Tilmann Bubeck 128393d1d1dSDr. Tilmann Bubeck /* Wait for all existing dio workers */ 129393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode); 130393d1d1dSDr. Tilmann Bubeck ext4_inode_block_unlocked_dio(inode_bl); 131393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode); 132393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode_bl); 133393d1d1dSDr. Tilmann Bubeck 134393d1d1dSDr. Tilmann Bubeck handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 135393d1d1dSDr. Tilmann Bubeck if (IS_ERR(handle)) { 136393d1d1dSDr. Tilmann Bubeck err = -EINVAL; 13730d29b11SZheng Liu goto journal_err_out; 138393d1d1dSDr. Tilmann Bubeck } 139393d1d1dSDr. Tilmann Bubeck 140393d1d1dSDr. Tilmann Bubeck /* Protect extent tree against block allocations via delalloc */ 141393d1d1dSDr. Tilmann Bubeck ext4_double_down_write_data_sem(inode, inode_bl); 142393d1d1dSDr. Tilmann Bubeck 143393d1d1dSDr. Tilmann Bubeck if (inode_bl->i_nlink == 0) { 144393d1d1dSDr. Tilmann Bubeck /* this inode has never been used as a BOOT_LOADER */ 145393d1d1dSDr. Tilmann Bubeck set_nlink(inode_bl, 1); 146393d1d1dSDr. Tilmann Bubeck i_uid_write(inode_bl, 0); 147393d1d1dSDr. Tilmann Bubeck i_gid_write(inode_bl, 0); 148393d1d1dSDr. Tilmann Bubeck inode_bl->i_flags = 0; 149393d1d1dSDr. Tilmann Bubeck ei_bl->i_flags = 0; 150393d1d1dSDr. Tilmann Bubeck inode_bl->i_version = 1; 151393d1d1dSDr. Tilmann Bubeck i_size_write(inode_bl, 0); 152393d1d1dSDr. Tilmann Bubeck inode_bl->i_mode = S_IFREG; 153393d1d1dSDr. Tilmann Bubeck if (EXT4_HAS_INCOMPAT_FEATURE(sb, 154393d1d1dSDr. Tilmann Bubeck EXT4_FEATURE_INCOMPAT_EXTENTS)) { 155393d1d1dSDr. Tilmann Bubeck ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 156393d1d1dSDr. Tilmann Bubeck ext4_ext_tree_init(handle, inode_bl); 157393d1d1dSDr. Tilmann Bubeck } else 158393d1d1dSDr. Tilmann Bubeck memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 159393d1d1dSDr. Tilmann Bubeck } 160393d1d1dSDr. Tilmann Bubeck 161393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 162393d1d1dSDr. Tilmann Bubeck 163393d1d1dSDr. Tilmann Bubeck inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); 164393d1d1dSDr. Tilmann Bubeck 165393d1d1dSDr. Tilmann Bubeck spin_lock(&sbi->s_next_gen_lock); 166393d1d1dSDr. Tilmann Bubeck inode->i_generation = sbi->s_next_generation++; 167393d1d1dSDr. Tilmann Bubeck inode_bl->i_generation = sbi->s_next_generation++; 168393d1d1dSDr. Tilmann Bubeck spin_unlock(&sbi->s_next_gen_lock); 169393d1d1dSDr. Tilmann Bubeck 170393d1d1dSDr. Tilmann Bubeck ext4_discard_preallocations(inode); 171393d1d1dSDr. Tilmann Bubeck 172393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode); 173393d1d1dSDr. Tilmann Bubeck if (err < 0) { 174393d1d1dSDr. Tilmann Bubeck ext4_warning(inode->i_sb, 175393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 176393d1d1dSDr. Tilmann Bubeck inode->i_ino, err); 177393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 178393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 179393d1d1dSDr. Tilmann Bubeck } else { 180393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode_bl); 181393d1d1dSDr. Tilmann Bubeck if (err < 0) { 182393d1d1dSDr. Tilmann Bubeck ext4_warning(inode_bl->i_sb, 183393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 184393d1d1dSDr. Tilmann Bubeck inode_bl->i_ino, err); 185393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 186393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 187393d1d1dSDr. Tilmann Bubeck ext4_mark_inode_dirty(handle, inode); 188393d1d1dSDr. Tilmann Bubeck } 189393d1d1dSDr. Tilmann Bubeck } 190393d1d1dSDr. Tilmann Bubeck ext4_journal_stop(handle); 191393d1d1dSDr. Tilmann Bubeck ext4_double_up_write_data_sem(inode, inode_bl); 192393d1d1dSDr. Tilmann Bubeck 19330d29b11SZheng Liu journal_err_out: 194393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode); 195393d1d1dSDr. Tilmann Bubeck ext4_inode_resume_unlocked_dio(inode_bl); 196375e289eSJ. Bruce Fields unlock_two_nondirectories(inode, inode_bl); 197393d1d1dSDr. Tilmann Bubeck iput(inode_bl); 198393d1d1dSDr. Tilmann Bubeck return err; 199393d1d1dSDr. Tilmann Bubeck } 200393d1d1dSDr. Tilmann Bubeck 2015cdd7b2dSAndi Kleen long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 202ac27a0ecSDave Kleikamp { 203496ad9aaSAl Viro struct inode *inode = file_inode(filp); 204bab08ab9STheodore Ts'o struct super_block *sb = inode->i_sb; 205617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 206ac27a0ecSDave Kleikamp unsigned int flags; 207ac27a0ecSDave Kleikamp 208617ba13bSMingming Cao ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 209ac27a0ecSDave Kleikamp 210ac27a0ecSDave Kleikamp switch (cmd) { 211617ba13bSMingming Cao case EXT4_IOC_GETFLAGS: 212ff9ddf7eSJan Kara ext4_get_inode_flags(ei); 213617ba13bSMingming Cao flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 214ac27a0ecSDave Kleikamp return put_user(flags, (int __user *) arg); 215617ba13bSMingming Cao case EXT4_IOC_SETFLAGS: { 216ac27a0ecSDave Kleikamp handle_t *handle = NULL; 2174db46fc2SAneesh Kumar K.V int err, migrate = 0; 218617ba13bSMingming Cao struct ext4_iloc iloc; 21979906964STheodore Ts'o unsigned int oldflags, mask, i; 220ac27a0ecSDave Kleikamp unsigned int jflag; 221ac27a0ecSDave Kleikamp 2222e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 223ac27a0ecSDave Kleikamp return -EACCES; 224ac27a0ecSDave Kleikamp 225ac27a0ecSDave Kleikamp if (get_user(flags, (int __user *) arg)) 226ac27a0ecSDave Kleikamp return -EFAULT; 227ac27a0ecSDave Kleikamp 228a561be71SAl Viro err = mnt_want_write_file(filp); 22942a74f20SDave Hansen if (err) 23042a74f20SDave Hansen return err; 23142a74f20SDave Hansen 2322dc6b0d4SDuane Griffin flags = ext4_mask_flags(inode->i_mode, flags); 233ac27a0ecSDave Kleikamp 23442a74f20SDave Hansen err = -EPERM; 235ac27a0ecSDave Kleikamp mutex_lock(&inode->i_mutex); 236e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 23742a74f20SDave Hansen if (IS_NOQUOTA(inode)) 23842a74f20SDave Hansen goto flags_out; 23942a74f20SDave Hansen 240ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 241ac27a0ecSDave Kleikamp 242ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 243617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 244ac27a0ecSDave Kleikamp 245ac27a0ecSDave Kleikamp /* 246ac27a0ecSDave Kleikamp * The IMMUTABLE and APPEND_ONLY flags can only be changed by 247ac27a0ecSDave Kleikamp * the relevant capability. 248ac27a0ecSDave Kleikamp * 249ac27a0ecSDave Kleikamp * This test looks nicer. Thanks to Pauline Middelink 250ac27a0ecSDave Kleikamp */ 251617ba13bSMingming Cao if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 25242a74f20SDave Hansen if (!capable(CAP_LINUX_IMMUTABLE)) 25342a74f20SDave Hansen goto flags_out; 254ac27a0ecSDave Kleikamp } 255ac27a0ecSDave Kleikamp 256ac27a0ecSDave Kleikamp /* 257ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 258ac27a0ecSDave Kleikamp * the relevant capability. 259ac27a0ecSDave Kleikamp */ 260617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 26142a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 26242a74f20SDave Hansen goto flags_out; 263ac27a0ecSDave Kleikamp } 264996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 2654db46fc2SAneesh Kumar K.V migrate = 1; 266ac27a0ecSDave Kleikamp 267c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 268c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 269c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 270c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 271c8d46e41SJiaying Zhang goto flags_out; 272c8d46e41SJiaying Zhang } 273c8d46e41SJiaying Zhang } else if (oldflags & EXT4_EOFBLOCKS_FL) 274c8d46e41SJiaying Zhang ext4_truncate(inode); 275c8d46e41SJiaying Zhang 2769924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 277ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 27842a74f20SDave Hansen err = PTR_ERR(handle); 27942a74f20SDave Hansen goto flags_out; 280ac27a0ecSDave Kleikamp } 281ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 2820390131bSFrank Mayhar ext4_handle_sync(handle); 283617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 284ac27a0ecSDave Kleikamp if (err) 285ac27a0ecSDave Kleikamp goto flags_err; 286ac27a0ecSDave Kleikamp 28779906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 28879906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 28979906964STheodore Ts'o continue; 29079906964STheodore Ts'o if (mask & flags) 29179906964STheodore Ts'o ext4_set_inode_flag(inode, i); 29279906964STheodore Ts'o else 29379906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 29479906964STheodore Ts'o } 295ac27a0ecSDave Kleikamp 296617ba13bSMingming Cao ext4_set_inode_flags(inode); 297ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 298ac27a0ecSDave Kleikamp 299617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 300ac27a0ecSDave Kleikamp flags_err: 301617ba13bSMingming Cao ext4_journal_stop(handle); 30242a74f20SDave Hansen if (err) 30342a74f20SDave Hansen goto flags_out; 304ac27a0ecSDave Kleikamp 305617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 306617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 3074db46fc2SAneesh Kumar K.V if (err) 3084db46fc2SAneesh Kumar K.V goto flags_out; 309996bb9fdSTheodore Ts'o if (migrate) { 310996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 3114db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 312996bb9fdSTheodore Ts'o else 313996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 314996bb9fdSTheodore Ts'o } 315996bb9fdSTheodore Ts'o 31642a74f20SDave Hansen flags_out: 317ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 3182a79f17eSAl Viro mnt_drop_write_file(filp); 319ac27a0ecSDave Kleikamp return err; 320ac27a0ecSDave Kleikamp } 321617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 322617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 323ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 324617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 325617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 326ac27a0ecSDave Kleikamp handle_t *handle; 327617ba13bSMingming Cao struct ext4_iloc iloc; 328ac27a0ecSDave Kleikamp __u32 generation; 329ac27a0ecSDave Kleikamp int err; 330ac27a0ecSDave Kleikamp 3312e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 332ac27a0ecSDave Kleikamp return -EPERM; 33342a74f20SDave Hansen 3349aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 335814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 336814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 337814525f4SDarrick J. Wong return -ENOTTY; 338814525f4SDarrick J. Wong } 339814525f4SDarrick J. Wong 340a561be71SAl Viro err = mnt_want_write_file(filp); 34142a74f20SDave Hansen if (err) 34242a74f20SDave Hansen return err; 34342a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 34442a74f20SDave Hansen err = -EFAULT; 34542a74f20SDave Hansen goto setversion_out; 34642a74f20SDave Hansen } 347ac27a0ecSDave Kleikamp 3486c2155b9SDjalal Harouni mutex_lock(&inode->i_mutex); 3499924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 35042a74f20SDave Hansen if (IS_ERR(handle)) { 35142a74f20SDave Hansen err = PTR_ERR(handle); 3526c2155b9SDjalal Harouni goto unlock_out; 35342a74f20SDave Hansen } 354617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 355ac27a0ecSDave Kleikamp if (err == 0) { 356ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 357ac27a0ecSDave Kleikamp inode->i_generation = generation; 358617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 359ac27a0ecSDave Kleikamp } 360617ba13bSMingming Cao ext4_journal_stop(handle); 3616c2155b9SDjalal Harouni 3626c2155b9SDjalal Harouni unlock_out: 3636c2155b9SDjalal Harouni mutex_unlock(&inode->i_mutex); 36442a74f20SDave Hansen setversion_out: 3652a79f17eSAl Viro mnt_drop_write_file(filp); 366ac27a0ecSDave Kleikamp return err; 367ac27a0ecSDave Kleikamp } 368617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 369617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 370ac046f1dSPeng Tao int err, err2=0; 371ac27a0ecSDave Kleikamp 3728f82f840SYongqiang Yang err = ext4_resize_begin(sb); 3738f82f840SYongqiang Yang if (err) 3748f82f840SYongqiang Yang return err; 375ac27a0ecSDave Kleikamp 376014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 377014a1770SDjalal Harouni err = -EFAULT; 378014a1770SDjalal Harouni goto group_extend_out; 379014a1770SDjalal Harouni } 380ac27a0ecSDave Kleikamp 381bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 382bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 383bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 384bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 385014a1770SDjalal Harouni err = -EOPNOTSUPP; 386014a1770SDjalal Harouni goto group_extend_out; 387bab08ab9STheodore Ts'o } 388bab08ab9STheodore Ts'o 389a561be71SAl Viro err = mnt_want_write_file(filp); 39042a74f20SDave Hansen if (err) 391014a1770SDjalal Harouni goto group_extend_out; 39242a74f20SDave Hansen 393617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 394ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 395dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 3967ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 397dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 398ac046f1dSPeng Tao } 3997ffe1ea8SHidehiro Kawai if (err == 0) 4007ffe1ea8SHidehiro Kawai err = err2; 4012a79f17eSAl Viro mnt_drop_write_file(filp); 402014a1770SDjalal Harouni group_extend_out: 4038f82f840SYongqiang Yang ext4_resize_end(sb); 404ac27a0ecSDave Kleikamp return err; 405ac27a0ecSDave Kleikamp } 406748de673SAkira Fujita 407748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 408748de673SAkira Fujita struct move_extent me; 4092903ff01SAl Viro struct fd donor; 4102903ff01SAl Viro int err; 411748de673SAkira Fujita 4124a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 4134a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 4144a58579bSAkira Fujita return -EBADF; 4154a58579bSAkira Fujita 416748de673SAkira Fujita if (copy_from_user(&me, 417748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 418748de673SAkira Fujita return -EFAULT; 4194a58579bSAkira Fujita me.moved_len = 0; 420748de673SAkira Fujita 4212903ff01SAl Viro donor = fdget(me.donor_fd); 4222903ff01SAl Viro if (!donor.file) 423748de673SAkira Fujita return -EBADF; 424748de673SAkira Fujita 4252903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 4264a58579bSAkira Fujita err = -EBADF; 4274a58579bSAkira Fujita goto mext_out; 428748de673SAkira Fujita } 429748de673SAkira Fujita 430bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 431bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 432bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 433bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 434399c9b86SAl Viro err = -EOPNOTSUPP; 435399c9b86SAl Viro goto mext_out; 436bab08ab9STheodore Ts'o } 437bab08ab9STheodore Ts'o 438a561be71SAl Viro err = mnt_want_write_file(filp); 4394a58579bSAkira Fujita if (err) 4404a58579bSAkira Fujita goto mext_out; 4414a58579bSAkira Fujita 4422903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 443748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 4442a79f17eSAl Viro mnt_drop_write_file(filp); 445748de673SAkira Fujita 446c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 447c437b273SAkira Fujita &me, sizeof(me))) 4484a58579bSAkira Fujita err = -EFAULT; 4494a58579bSAkira Fujita mext_out: 4502903ff01SAl Viro fdput(donor); 451748de673SAkira Fujita return err; 452748de673SAkira Fujita } 453748de673SAkira Fujita 454617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 455617ba13bSMingming Cao struct ext4_new_group_data input; 456ac046f1dSPeng Tao int err, err2=0; 457ac27a0ecSDave Kleikamp 4588f82f840SYongqiang Yang err = ext4_resize_begin(sb); 4598f82f840SYongqiang Yang if (err) 4608f82f840SYongqiang Yang return err; 461ac27a0ecSDave Kleikamp 462617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 463014a1770SDjalal Harouni sizeof(input))) { 464014a1770SDjalal Harouni err = -EFAULT; 465014a1770SDjalal Harouni goto group_add_out; 466014a1770SDjalal Harouni } 467ac27a0ecSDave Kleikamp 468bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 469bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 470bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 471bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 472014a1770SDjalal Harouni err = -EOPNOTSUPP; 473014a1770SDjalal Harouni goto group_add_out; 474bab08ab9STheodore Ts'o } 475bab08ab9STheodore Ts'o 476a561be71SAl Viro err = mnt_want_write_file(filp); 47742a74f20SDave Hansen if (err) 478014a1770SDjalal Harouni goto group_add_out; 47942a74f20SDave Hansen 480617ba13bSMingming Cao err = ext4_group_add(sb, &input); 481ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 482dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 4837ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 484dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 485ac046f1dSPeng Tao } 4867ffe1ea8SHidehiro Kawai if (err == 0) 4877ffe1ea8SHidehiro Kawai err = err2; 4882a79f17eSAl Viro mnt_drop_write_file(filp); 4897f511862STheodore Ts'o if (!err && ext4_has_group_desc_csum(sb) && 4907f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 4917f511862STheodore Ts'o err = ext4_register_li_request(sb, input.group); 492014a1770SDjalal Harouni group_add_out: 4938f82f840SYongqiang Yang ext4_resize_end(sb); 494ac27a0ecSDave Kleikamp return err; 495ac27a0ecSDave Kleikamp } 496ac27a0ecSDave Kleikamp 497c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 4982a43a878SAneesh Kumar K.V { 4992a43a878SAneesh Kumar K.V int err; 5002e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 5012a43a878SAneesh Kumar K.V return -EACCES; 5022a43a878SAneesh Kumar K.V 503a561be71SAl Viro err = mnt_want_write_file(filp); 5042a43a878SAneesh Kumar K.V if (err) 5052a43a878SAneesh Kumar K.V return err; 5062a43a878SAneesh Kumar K.V /* 5072a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 5082a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 5092a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 5102a43a878SAneesh Kumar K.V * inode format to prevent read. 5112a43a878SAneesh Kumar K.V */ 5122a43a878SAneesh Kumar K.V mutex_lock(&(inode->i_mutex)); 5132a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 5142a43a878SAneesh Kumar K.V mutex_unlock(&(inode->i_mutex)); 5152a79f17eSAl Viro mnt_drop_write_file(filp); 5162a43a878SAneesh Kumar K.V return err; 5172a43a878SAneesh Kumar K.V } 518c14c6fd5SAneesh Kumar K.V 519ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 520ccd2506bSTheodore Ts'o { 521ccd2506bSTheodore Ts'o int err; 5222e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 523ccd2506bSTheodore Ts'o return -EACCES; 524ccd2506bSTheodore Ts'o 525a561be71SAl Viro err = mnt_want_write_file(filp); 526ccd2506bSTheodore Ts'o if (err) 527ccd2506bSTheodore Ts'o return err; 528ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 5292a79f17eSAl Viro mnt_drop_write_file(filp); 530ccd2506bSTheodore Ts'o return err; 531ccd2506bSTheodore Ts'o } 532ccd2506bSTheodore Ts'o 533393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 5343e67cfadSDmitry Monakhov { 5353e67cfadSDmitry Monakhov int err; 536393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 537393d1d1dSDr. Tilmann Bubeck return -EBADF; 5383e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 5393e67cfadSDmitry Monakhov if (err) 5403e67cfadSDmitry Monakhov return err; 5413e67cfadSDmitry Monakhov err = swap_inode_boot_loader(sb, inode); 5423e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 5433e67cfadSDmitry Monakhov return err; 5443e67cfadSDmitry Monakhov } 545393d1d1dSDr. Tilmann Bubeck 54619c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 54719c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 54819c5246dSYongqiang Yang int err = 0, err2 = 0; 5497f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 55019c5246dSYongqiang Yang 55119c5246dSYongqiang Yang if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 55219c5246dSYongqiang Yang EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 55319c5246dSYongqiang Yang ext4_msg(sb, KERN_ERR, 55419c5246dSYongqiang Yang "Online resizing not (yet) supported with bigalloc"); 55519c5246dSYongqiang Yang return -EOPNOTSUPP; 55619c5246dSYongqiang Yang } 55719c5246dSYongqiang Yang 55819c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 55919c5246dSYongqiang Yang sizeof(__u64))) { 56019c5246dSYongqiang Yang return -EFAULT; 56119c5246dSYongqiang Yang } 56219c5246dSYongqiang Yang 56319c5246dSYongqiang Yang err = ext4_resize_begin(sb); 56419c5246dSYongqiang Yang if (err) 56519c5246dSYongqiang Yang return err; 56619c5246dSYongqiang Yang 5678cae6f71SAl Viro err = mnt_want_write_file(filp); 56819c5246dSYongqiang Yang if (err) 56919c5246dSYongqiang Yang goto resizefs_out; 57019c5246dSYongqiang Yang 57119c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 57219c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 57319c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 57419c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 57519c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 57619c5246dSYongqiang Yang } 57719c5246dSYongqiang Yang if (err == 0) 57819c5246dSYongqiang Yang err = err2; 5798cae6f71SAl Viro mnt_drop_write_file(filp); 5807f511862STheodore Ts'o if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && 5817f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 5827f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 5837f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 5847f511862STheodore Ts'o 58519c5246dSYongqiang Yang resizefs_out: 58619c5246dSYongqiang Yang ext4_resize_end(sb); 58719c5246dSYongqiang Yang return err; 58819c5246dSYongqiang Yang } 58919c5246dSYongqiang Yang 590e681c047SLukas Czerner case FITRIM: 591e681c047SLukas Czerner { 59241431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 593e681c047SLukas Czerner struct fstrim_range range; 594e681c047SLukas Czerner int ret = 0; 595e681c047SLukas Czerner 596e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 597e681c047SLukas Czerner return -EPERM; 598e681c047SLukas Czerner 59941431792SLukas Czerner if (!blk_queue_discard(q)) 60041431792SLukas Czerner return -EOPNOTSUPP; 60141431792SLukas Czerner 602e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 603e681c047SLukas Czerner sizeof(range))) 604e681c047SLukas Czerner return -EFAULT; 605e681c047SLukas Czerner 6065c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 6075c2ed62fSLukas Czerner q->limits.discard_granularity); 608e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 609e681c047SLukas Czerner if (ret < 0) 610e681c047SLukas Czerner return ret; 611e681c047SLukas Czerner 612e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 613e681c047SLukas Czerner sizeof(range))) 614e681c047SLukas Czerner return -EFAULT; 615e681c047SLukas Czerner 616e681c047SLukas Czerner return 0; 617e681c047SLukas Czerner } 6187869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 6197869a4a6STheodore Ts'o return ext4_ext_precache(inode); 620e681c047SLukas Czerner 621ac27a0ecSDave Kleikamp default: 622ac27a0ecSDave Kleikamp return -ENOTTY; 623ac27a0ecSDave Kleikamp } 624ac27a0ecSDave Kleikamp } 625ac27a0ecSDave Kleikamp 626ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 627617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 628ac27a0ecSDave Kleikamp { 629ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 630ac27a0ecSDave Kleikamp switch (cmd) { 631617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 632617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 633ac27a0ecSDave Kleikamp break; 634617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 635617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 636ac27a0ecSDave Kleikamp break; 637617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 638617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 639ac27a0ecSDave Kleikamp break; 640617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 641617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 642ac27a0ecSDave Kleikamp break; 643617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 644617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 645ac27a0ecSDave Kleikamp break; 646617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 647617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 648ac27a0ecSDave Kleikamp break; 649617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 650617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 651ac27a0ecSDave Kleikamp break; 652617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 653617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 654ac27a0ecSDave Kleikamp break; 655617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 656617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 657ac27a0ecSDave Kleikamp break; 6584d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 6594d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 6604d92dc0fSBen Hutchings struct ext4_new_group_input input; 6614d92dc0fSBen Hutchings mm_segment_t old_fs; 6624d92dc0fSBen Hutchings int err; 6634d92dc0fSBen Hutchings 6644d92dc0fSBen Hutchings uinput = compat_ptr(arg); 6654d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 6664d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 6674d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 6684d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 6694d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 6704d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 6714d92dc0fSBen Hutchings &uinput->reserved_blocks); 6724d92dc0fSBen Hutchings if (err) 6734d92dc0fSBen Hutchings return -EFAULT; 6744d92dc0fSBen Hutchings old_fs = get_fs(); 6754d92dc0fSBen Hutchings set_fs(KERNEL_DS); 6764d92dc0fSBen Hutchings err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 6774d92dc0fSBen Hutchings (unsigned long) &input); 6784d92dc0fSBen Hutchings set_fs(old_fs); 6794d92dc0fSBen Hutchings return err; 6804d92dc0fSBen Hutchings } 681b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 682a56e69c2STao Ma case FITRIM: 68319c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 6847869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 685b684b2eeSChristian Borntraeger break; 686ac27a0ecSDave Kleikamp default: 687ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 688ac27a0ecSDave Kleikamp } 6895cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 690ac27a0ecSDave Kleikamp } 691ac27a0ecSDave Kleikamp #endif 692