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 215cdd7b2dSAndi Kleen long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 22ac27a0ecSDave Kleikamp { 235cdd7b2dSAndi Kleen struct inode *inode = filp->f_dentry->d_inode; 24bab08ab9STheodore Ts'o struct super_block *sb = inode->i_sb; 25617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 26ac27a0ecSDave Kleikamp unsigned int flags; 27ac27a0ecSDave Kleikamp 28617ba13bSMingming Cao ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 29ac27a0ecSDave Kleikamp 30ac27a0ecSDave Kleikamp switch (cmd) { 31617ba13bSMingming Cao case EXT4_IOC_GETFLAGS: 32ff9ddf7eSJan Kara ext4_get_inode_flags(ei); 33617ba13bSMingming Cao flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 34ac27a0ecSDave Kleikamp return put_user(flags, (int __user *) arg); 35617ba13bSMingming Cao case EXT4_IOC_SETFLAGS: { 36ac27a0ecSDave Kleikamp handle_t *handle = NULL; 374db46fc2SAneesh Kumar K.V int err, migrate = 0; 38617ba13bSMingming Cao struct ext4_iloc iloc; 39ac27a0ecSDave Kleikamp unsigned int oldflags; 40ac27a0ecSDave Kleikamp unsigned int jflag; 41ac27a0ecSDave Kleikamp 422e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 43ac27a0ecSDave Kleikamp return -EACCES; 44ac27a0ecSDave Kleikamp 45ac27a0ecSDave Kleikamp if (get_user(flags, (int __user *) arg)) 46ac27a0ecSDave Kleikamp return -EFAULT; 47ac27a0ecSDave Kleikamp 48a561be71SAl Viro err = mnt_want_write_file(filp); 4942a74f20SDave Hansen if (err) 5042a74f20SDave Hansen return err; 5142a74f20SDave Hansen 522dc6b0d4SDuane Griffin flags = ext4_mask_flags(inode->i_mode, flags); 53ac27a0ecSDave Kleikamp 5442a74f20SDave Hansen err = -EPERM; 55ac27a0ecSDave Kleikamp mutex_lock(&inode->i_mutex); 56e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 5742a74f20SDave Hansen if (IS_NOQUOTA(inode)) 5842a74f20SDave Hansen goto flags_out; 5942a74f20SDave Hansen 60ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 61ac27a0ecSDave Kleikamp 62ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 63617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 64ac27a0ecSDave Kleikamp 65ac27a0ecSDave Kleikamp /* 66ac27a0ecSDave Kleikamp * The IMMUTABLE and APPEND_ONLY flags can only be changed by 67ac27a0ecSDave Kleikamp * the relevant capability. 68ac27a0ecSDave Kleikamp * 69ac27a0ecSDave Kleikamp * This test looks nicer. Thanks to Pauline Middelink 70ac27a0ecSDave Kleikamp */ 71617ba13bSMingming Cao if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 7242a74f20SDave Hansen if (!capable(CAP_LINUX_IMMUTABLE)) 7342a74f20SDave Hansen goto flags_out; 74ac27a0ecSDave Kleikamp } 75ac27a0ecSDave Kleikamp 76ac27a0ecSDave Kleikamp /* 77ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 78ac27a0ecSDave Kleikamp * the relevant capability. 79ac27a0ecSDave Kleikamp */ 80617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 8142a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 8242a74f20SDave Hansen goto flags_out; 83ac27a0ecSDave Kleikamp } 844db46fc2SAneesh Kumar K.V if (oldflags & EXT4_EXTENTS_FL) { 854db46fc2SAneesh Kumar K.V /* We don't support clearning extent flags */ 864db46fc2SAneesh Kumar K.V if (!(flags & EXT4_EXTENTS_FL)) { 874db46fc2SAneesh Kumar K.V err = -EOPNOTSUPP; 884db46fc2SAneesh Kumar K.V goto flags_out; 894db46fc2SAneesh Kumar K.V } 904db46fc2SAneesh Kumar K.V } else if (flags & EXT4_EXTENTS_FL) { 914db46fc2SAneesh Kumar K.V /* migrate the file */ 924db46fc2SAneesh Kumar K.V migrate = 1; 934db46fc2SAneesh Kumar K.V flags &= ~EXT4_EXTENTS_FL; 944db46fc2SAneesh Kumar K.V } 95ac27a0ecSDave Kleikamp 96c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 97c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 98c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 99c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 100c8d46e41SJiaying Zhang goto flags_out; 101c8d46e41SJiaying Zhang } 102c8d46e41SJiaying Zhang } else if (oldflags & EXT4_EOFBLOCKS_FL) 103c8d46e41SJiaying Zhang ext4_truncate(inode); 104c8d46e41SJiaying Zhang 105617ba13bSMingming Cao handle = ext4_journal_start(inode, 1); 106ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 10742a74f20SDave Hansen err = PTR_ERR(handle); 10842a74f20SDave Hansen goto flags_out; 109ac27a0ecSDave Kleikamp } 110ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 1110390131bSFrank Mayhar ext4_handle_sync(handle); 112617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 113ac27a0ecSDave Kleikamp if (err) 114ac27a0ecSDave Kleikamp goto flags_err; 115ac27a0ecSDave Kleikamp 116617ba13bSMingming Cao flags = flags & EXT4_FL_USER_MODIFIABLE; 117617ba13bSMingming Cao flags |= oldflags & ~EXT4_FL_USER_MODIFIABLE; 118ac27a0ecSDave Kleikamp ei->i_flags = flags; 119ac27a0ecSDave Kleikamp 120617ba13bSMingming Cao ext4_set_inode_flags(inode); 121ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 122ac27a0ecSDave Kleikamp 123617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 124ac27a0ecSDave Kleikamp flags_err: 125617ba13bSMingming Cao ext4_journal_stop(handle); 12642a74f20SDave Hansen if (err) 12742a74f20SDave Hansen goto flags_out; 128ac27a0ecSDave Kleikamp 129617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 130617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 1314db46fc2SAneesh Kumar K.V if (err) 1324db46fc2SAneesh Kumar K.V goto flags_out; 1334db46fc2SAneesh Kumar K.V if (migrate) 1344db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 13542a74f20SDave Hansen flags_out: 136ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 13742a74f20SDave Hansen mnt_drop_write(filp->f_path.mnt); 138ac27a0ecSDave Kleikamp return err; 139ac27a0ecSDave Kleikamp } 140617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 141617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 142ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 143617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 144617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 145ac27a0ecSDave Kleikamp handle_t *handle; 146617ba13bSMingming Cao struct ext4_iloc iloc; 147ac27a0ecSDave Kleikamp __u32 generation; 148ac27a0ecSDave Kleikamp int err; 149ac27a0ecSDave Kleikamp 1502e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 151ac27a0ecSDave Kleikamp return -EPERM; 15242a74f20SDave Hansen 153a561be71SAl Viro err = mnt_want_write_file(filp); 15442a74f20SDave Hansen if (err) 15542a74f20SDave Hansen return err; 15642a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 15742a74f20SDave Hansen err = -EFAULT; 15842a74f20SDave Hansen goto setversion_out; 15942a74f20SDave Hansen } 160ac27a0ecSDave Kleikamp 161617ba13bSMingming Cao handle = ext4_journal_start(inode, 1); 16242a74f20SDave Hansen if (IS_ERR(handle)) { 16342a74f20SDave Hansen err = PTR_ERR(handle); 16442a74f20SDave Hansen goto setversion_out; 16542a74f20SDave Hansen } 166617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 167ac27a0ecSDave Kleikamp if (err == 0) { 168ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 169ac27a0ecSDave Kleikamp inode->i_generation = generation; 170617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 171ac27a0ecSDave Kleikamp } 172617ba13bSMingming Cao ext4_journal_stop(handle); 17342a74f20SDave Hansen setversion_out: 17442a74f20SDave Hansen mnt_drop_write(filp->f_path.mnt); 175ac27a0ecSDave Kleikamp return err; 176ac27a0ecSDave Kleikamp } 177617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 178617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 179ac046f1dSPeng Tao int err, err2=0; 180ac27a0ecSDave Kleikamp 1818f82f840SYongqiang Yang err = ext4_resize_begin(sb); 1828f82f840SYongqiang Yang if (err) 1838f82f840SYongqiang Yang return err; 184ac27a0ecSDave Kleikamp 185ac27a0ecSDave Kleikamp if (get_user(n_blocks_count, (__u32 __user *)arg)) 186ac27a0ecSDave Kleikamp return -EFAULT; 187ac27a0ecSDave Kleikamp 188bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 189bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 190bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 191bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 192bab08ab9STheodore Ts'o return -EOPNOTSUPP; 193bab08ab9STheodore Ts'o } 194bab08ab9STheodore Ts'o 195a561be71SAl Viro err = mnt_want_write_file(filp); 19642a74f20SDave Hansen if (err) 19742a74f20SDave Hansen return err; 19842a74f20SDave Hansen 199617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 200ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 201dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 2027ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 203dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 204ac046f1dSPeng Tao } 2057ffe1ea8SHidehiro Kawai if (err == 0) 2067ffe1ea8SHidehiro Kawai err = err2; 20742a74f20SDave Hansen mnt_drop_write(filp->f_path.mnt); 2088f82f840SYongqiang Yang ext4_resize_end(sb); 209ac27a0ecSDave Kleikamp 210ac27a0ecSDave Kleikamp return err; 211ac27a0ecSDave Kleikamp } 212748de673SAkira Fujita 213748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 214748de673SAkira Fujita struct move_extent me; 215748de673SAkira Fujita struct file *donor_filp; 216748de673SAkira Fujita int err; 217748de673SAkira Fujita 2184a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 2194a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 2204a58579bSAkira Fujita return -EBADF; 2214a58579bSAkira Fujita 222748de673SAkira Fujita if (copy_from_user(&me, 223748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 224748de673SAkira Fujita return -EFAULT; 2254a58579bSAkira Fujita me.moved_len = 0; 226748de673SAkira Fujita 227748de673SAkira Fujita donor_filp = fget(me.donor_fd); 228748de673SAkira Fujita if (!donor_filp) 229748de673SAkira Fujita return -EBADF; 230748de673SAkira Fujita 2314a58579bSAkira Fujita if (!(donor_filp->f_mode & FMODE_WRITE)) { 2324a58579bSAkira Fujita err = -EBADF; 2334a58579bSAkira Fujita goto mext_out; 234748de673SAkira Fujita } 235748de673SAkira Fujita 236bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 237bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 238bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 239bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 240bab08ab9STheodore Ts'o return -EOPNOTSUPP; 241bab08ab9STheodore Ts'o } 242bab08ab9STheodore Ts'o 243a561be71SAl Viro err = mnt_want_write_file(filp); 2444a58579bSAkira Fujita if (err) 2454a58579bSAkira Fujita goto mext_out; 2464a58579bSAkira Fujita 247748de673SAkira Fujita err = ext4_move_extents(filp, donor_filp, me.orig_start, 248748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 2494a58579bSAkira Fujita mnt_drop_write(filp->f_path.mnt); 2504a58579bSAkira Fujita if (me.moved_len > 0) 2514a58579bSAkira Fujita file_remove_suid(donor_filp); 252748de673SAkira Fujita 253c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 254c437b273SAkira Fujita &me, sizeof(me))) 2554a58579bSAkira Fujita err = -EFAULT; 2564a58579bSAkira Fujita mext_out: 2574a58579bSAkira Fujita fput(donor_filp); 258748de673SAkira Fujita return err; 259748de673SAkira Fujita } 260748de673SAkira Fujita 261617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 262617ba13bSMingming Cao struct ext4_new_group_data input; 263ac046f1dSPeng Tao int err, err2=0; 264ac27a0ecSDave Kleikamp 2658f82f840SYongqiang Yang err = ext4_resize_begin(sb); 2668f82f840SYongqiang Yang if (err) 2678f82f840SYongqiang Yang return err; 268ac27a0ecSDave Kleikamp 269617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 270ac27a0ecSDave Kleikamp sizeof(input))) 271ac27a0ecSDave Kleikamp return -EFAULT; 272ac27a0ecSDave Kleikamp 273bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 274bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 275bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 276bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 277bab08ab9STheodore Ts'o return -EOPNOTSUPP; 278bab08ab9STheodore Ts'o } 279bab08ab9STheodore Ts'o 280a561be71SAl Viro err = mnt_want_write_file(filp); 28142a74f20SDave Hansen if (err) 28242a74f20SDave Hansen return err; 28342a74f20SDave Hansen 284617ba13bSMingming Cao err = ext4_group_add(sb, &input); 285ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 286dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 2877ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 288dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 289ac046f1dSPeng Tao } 2907ffe1ea8SHidehiro Kawai if (err == 0) 2917ffe1ea8SHidehiro Kawai err = err2; 29242a74f20SDave Hansen mnt_drop_write(filp->f_path.mnt); 2938f82f840SYongqiang Yang ext4_resize_end(sb); 294ac27a0ecSDave Kleikamp 295ac27a0ecSDave Kleikamp return err; 296ac27a0ecSDave Kleikamp } 297ac27a0ecSDave Kleikamp 298c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 2992a43a878SAneesh Kumar K.V { 3002a43a878SAneesh Kumar K.V int err; 3012e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 3022a43a878SAneesh Kumar K.V return -EACCES; 3032a43a878SAneesh Kumar K.V 304a561be71SAl Viro err = mnt_want_write_file(filp); 3052a43a878SAneesh Kumar K.V if (err) 3062a43a878SAneesh Kumar K.V return err; 3072a43a878SAneesh Kumar K.V /* 3082a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 3092a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 3102a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 3112a43a878SAneesh Kumar K.V * inode format to prevent read. 3122a43a878SAneesh Kumar K.V */ 3132a43a878SAneesh Kumar K.V mutex_lock(&(inode->i_mutex)); 3142a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 3152a43a878SAneesh Kumar K.V mutex_unlock(&(inode->i_mutex)); 3162a43a878SAneesh Kumar K.V mnt_drop_write(filp->f_path.mnt); 3172a43a878SAneesh Kumar K.V return err; 3182a43a878SAneesh Kumar K.V } 319c14c6fd5SAneesh Kumar K.V 320ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 321ccd2506bSTheodore Ts'o { 322ccd2506bSTheodore Ts'o int err; 3232e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 324ccd2506bSTheodore Ts'o return -EACCES; 325ccd2506bSTheodore Ts'o 326a561be71SAl Viro err = mnt_want_write_file(filp); 327ccd2506bSTheodore Ts'o if (err) 328ccd2506bSTheodore Ts'o return err; 329ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 330ccd2506bSTheodore Ts'o mnt_drop_write(filp->f_path.mnt); 331ccd2506bSTheodore Ts'o return err; 332ccd2506bSTheodore Ts'o } 333ccd2506bSTheodore Ts'o 334e681c047SLukas Czerner case FITRIM: 335e681c047SLukas Czerner { 33641431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 337e681c047SLukas Czerner struct fstrim_range range; 338e681c047SLukas Czerner int ret = 0; 339e681c047SLukas Czerner 340e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 341e681c047SLukas Czerner return -EPERM; 342e681c047SLukas Czerner 34341431792SLukas Czerner if (!blk_queue_discard(q)) 34441431792SLukas Czerner return -EOPNOTSUPP; 34541431792SLukas Czerner 346bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 347bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 348bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 349bab08ab9STheodore Ts'o "FITRIM not supported with bigalloc"); 350bab08ab9STheodore Ts'o return -EOPNOTSUPP; 351bab08ab9STheodore Ts'o } 352bab08ab9STheodore Ts'o 353e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 354e681c047SLukas Czerner sizeof(range))) 355e681c047SLukas Czerner return -EFAULT; 356e681c047SLukas Czerner 3575c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 3585c2ed62fSLukas Czerner q->limits.discard_granularity); 359e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 360e681c047SLukas Czerner if (ret < 0) 361e681c047SLukas Czerner return ret; 362e681c047SLukas Czerner 363e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 364e681c047SLukas Czerner sizeof(range))) 365e681c047SLukas Czerner return -EFAULT; 366e681c047SLukas Czerner 367e681c047SLukas Czerner return 0; 368e681c047SLukas Czerner } 369e681c047SLukas Czerner 370ac27a0ecSDave Kleikamp default: 371ac27a0ecSDave Kleikamp return -ENOTTY; 372ac27a0ecSDave Kleikamp } 373ac27a0ecSDave Kleikamp } 374ac27a0ecSDave Kleikamp 375ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 376617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 377ac27a0ecSDave Kleikamp { 378ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 379ac27a0ecSDave Kleikamp switch (cmd) { 380617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 381617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 382ac27a0ecSDave Kleikamp break; 383617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 384617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 385ac27a0ecSDave Kleikamp break; 386617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 387617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 388ac27a0ecSDave Kleikamp break; 389617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 390617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 391ac27a0ecSDave Kleikamp break; 392617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 393617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 394ac27a0ecSDave Kleikamp break; 395617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 396617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 397ac27a0ecSDave Kleikamp break; 398617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 399617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 400ac27a0ecSDave Kleikamp break; 401617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 402617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 403ac27a0ecSDave Kleikamp break; 404617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 405617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 406ac27a0ecSDave Kleikamp break; 4074d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 4084d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 4094d92dc0fSBen Hutchings struct ext4_new_group_input input; 4104d92dc0fSBen Hutchings mm_segment_t old_fs; 4114d92dc0fSBen Hutchings int err; 4124d92dc0fSBen Hutchings 4134d92dc0fSBen Hutchings uinput = compat_ptr(arg); 4144d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 4154d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 4164d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 4174d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 4184d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 4194d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 4204d92dc0fSBen Hutchings &uinput->reserved_blocks); 4214d92dc0fSBen Hutchings if (err) 4224d92dc0fSBen Hutchings return -EFAULT; 4234d92dc0fSBen Hutchings old_fs = get_fs(); 4244d92dc0fSBen Hutchings set_fs(KERNEL_DS); 4254d92dc0fSBen Hutchings err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 4264d92dc0fSBen Hutchings (unsigned long) &input); 4274d92dc0fSBen Hutchings set_fs(old_fs); 4284d92dc0fSBen Hutchings return err; 4294d92dc0fSBen Hutchings } 430b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 431a56e69c2STao Ma case FITRIM: 432b684b2eeSChristian Borntraeger break; 433ac27a0ecSDave Kleikamp default: 434ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 435ac27a0ecSDave Kleikamp } 4365cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 437ac27a0ecSDave Kleikamp } 438ac27a0ecSDave Kleikamp #endif 439