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 235cdd7b2dSAndi Kleen long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 24ac27a0ecSDave Kleikamp { 255cdd7b2dSAndi Kleen struct inode *inode = filp->f_dentry->d_inode; 26bab08ab9STheodore Ts'o struct super_block *sb = inode->i_sb; 27617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 28ac27a0ecSDave Kleikamp unsigned int flags; 29ac27a0ecSDave Kleikamp 30617ba13bSMingming Cao ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 31ac27a0ecSDave Kleikamp 32ac27a0ecSDave Kleikamp switch (cmd) { 33617ba13bSMingming Cao case EXT4_IOC_GETFLAGS: 34ff9ddf7eSJan Kara ext4_get_inode_flags(ei); 35617ba13bSMingming Cao flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 36ac27a0ecSDave Kleikamp return put_user(flags, (int __user *) arg); 37617ba13bSMingming Cao case EXT4_IOC_SETFLAGS: { 38ac27a0ecSDave Kleikamp handle_t *handle = NULL; 394db46fc2SAneesh Kumar K.V int err, migrate = 0; 40617ba13bSMingming Cao struct ext4_iloc iloc; 41ac27a0ecSDave Kleikamp unsigned int oldflags; 42ac27a0ecSDave Kleikamp unsigned int jflag; 43ac27a0ecSDave Kleikamp 442e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 45ac27a0ecSDave Kleikamp return -EACCES; 46ac27a0ecSDave Kleikamp 47ac27a0ecSDave Kleikamp if (get_user(flags, (int __user *) arg)) 48ac27a0ecSDave Kleikamp return -EFAULT; 49ac27a0ecSDave Kleikamp 5042a74f20SDave Hansen err = mnt_want_write(filp->f_path.mnt); 5142a74f20SDave Hansen if (err) 5242a74f20SDave Hansen return err; 5342a74f20SDave Hansen 542dc6b0d4SDuane Griffin flags = ext4_mask_flags(inode->i_mode, flags); 55ac27a0ecSDave Kleikamp 5642a74f20SDave Hansen err = -EPERM; 57ac27a0ecSDave Kleikamp mutex_lock(&inode->i_mutex); 58e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 5942a74f20SDave Hansen if (IS_NOQUOTA(inode)) 6042a74f20SDave Hansen goto flags_out; 6142a74f20SDave Hansen 62ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 63ac27a0ecSDave Kleikamp 64ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 65617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 66ac27a0ecSDave Kleikamp 67ac27a0ecSDave Kleikamp /* 68ac27a0ecSDave Kleikamp * The IMMUTABLE and APPEND_ONLY flags can only be changed by 69ac27a0ecSDave Kleikamp * the relevant capability. 70ac27a0ecSDave Kleikamp * 71ac27a0ecSDave Kleikamp * This test looks nicer. Thanks to Pauline Middelink 72ac27a0ecSDave Kleikamp */ 73617ba13bSMingming Cao if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 7442a74f20SDave Hansen if (!capable(CAP_LINUX_IMMUTABLE)) 7542a74f20SDave Hansen goto flags_out; 76ac27a0ecSDave Kleikamp } 77ac27a0ecSDave Kleikamp 78ac27a0ecSDave Kleikamp /* 79ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 80ac27a0ecSDave Kleikamp * the relevant capability. 81ac27a0ecSDave Kleikamp */ 82617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 8342a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 8442a74f20SDave Hansen goto flags_out; 85ac27a0ecSDave Kleikamp } 864db46fc2SAneesh Kumar K.V if (oldflags & EXT4_EXTENTS_FL) { 874db46fc2SAneesh Kumar K.V /* We don't support clearning extent flags */ 884db46fc2SAneesh Kumar K.V if (!(flags & EXT4_EXTENTS_FL)) { 894db46fc2SAneesh Kumar K.V err = -EOPNOTSUPP; 904db46fc2SAneesh Kumar K.V goto flags_out; 914db46fc2SAneesh Kumar K.V } 924db46fc2SAneesh Kumar K.V } else if (flags & EXT4_EXTENTS_FL) { 934db46fc2SAneesh Kumar K.V /* migrate the file */ 944db46fc2SAneesh Kumar K.V migrate = 1; 954db46fc2SAneesh Kumar K.V flags &= ~EXT4_EXTENTS_FL; 964db46fc2SAneesh Kumar K.V } 97ac27a0ecSDave Kleikamp 98c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 99c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 100c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 101c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 102c8d46e41SJiaying Zhang goto flags_out; 103c8d46e41SJiaying Zhang } 104c8d46e41SJiaying Zhang } else if (oldflags & EXT4_EOFBLOCKS_FL) 105c8d46e41SJiaying Zhang ext4_truncate(inode); 106c8d46e41SJiaying Zhang 107617ba13bSMingming Cao handle = ext4_journal_start(inode, 1); 108ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 10942a74f20SDave Hansen err = PTR_ERR(handle); 11042a74f20SDave Hansen goto flags_out; 111ac27a0ecSDave Kleikamp } 112ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 1130390131bSFrank Mayhar ext4_handle_sync(handle); 114617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 115ac27a0ecSDave Kleikamp if (err) 116ac27a0ecSDave Kleikamp goto flags_err; 117ac27a0ecSDave Kleikamp 118617ba13bSMingming Cao flags = flags & EXT4_FL_USER_MODIFIABLE; 119617ba13bSMingming Cao flags |= oldflags & ~EXT4_FL_USER_MODIFIABLE; 120ac27a0ecSDave Kleikamp ei->i_flags = flags; 121ac27a0ecSDave Kleikamp 122617ba13bSMingming Cao ext4_set_inode_flags(inode); 123ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 124ac27a0ecSDave Kleikamp 125617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 126ac27a0ecSDave Kleikamp flags_err: 127617ba13bSMingming Cao ext4_journal_stop(handle); 12842a74f20SDave Hansen if (err) 12942a74f20SDave Hansen goto flags_out; 130ac27a0ecSDave Kleikamp 131617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 132617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 1334db46fc2SAneesh Kumar K.V if (err) 1344db46fc2SAneesh Kumar K.V goto flags_out; 1354db46fc2SAneesh Kumar K.V if (migrate) 1364db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 13742a74f20SDave Hansen flags_out: 138ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 13942a74f20SDave Hansen mnt_drop_write(filp->f_path.mnt); 140ac27a0ecSDave Kleikamp return err; 141ac27a0ecSDave Kleikamp } 142617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 143617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 144ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 145617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 146617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 147ac27a0ecSDave Kleikamp handle_t *handle; 148617ba13bSMingming Cao struct ext4_iloc iloc; 149ac27a0ecSDave Kleikamp __u32 generation; 150ac27a0ecSDave Kleikamp int err; 151ac27a0ecSDave Kleikamp 1522e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 153ac27a0ecSDave Kleikamp return -EPERM; 15442a74f20SDave Hansen 15542a74f20SDave Hansen err = mnt_want_write(filp->f_path.mnt); 15642a74f20SDave Hansen if (err) 15742a74f20SDave Hansen return err; 15842a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 15942a74f20SDave Hansen err = -EFAULT; 16042a74f20SDave Hansen goto setversion_out; 16142a74f20SDave Hansen } 162ac27a0ecSDave Kleikamp 163617ba13bSMingming Cao handle = ext4_journal_start(inode, 1); 16442a74f20SDave Hansen if (IS_ERR(handle)) { 16542a74f20SDave Hansen err = PTR_ERR(handle); 16642a74f20SDave Hansen goto setversion_out; 16742a74f20SDave Hansen } 168617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 169ac27a0ecSDave Kleikamp if (err == 0) { 170ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 171ac27a0ecSDave Kleikamp inode->i_generation = generation; 172617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 173ac27a0ecSDave Kleikamp } 174617ba13bSMingming Cao ext4_journal_stop(handle); 17542a74f20SDave Hansen setversion_out: 17642a74f20SDave Hansen mnt_drop_write(filp->f_path.mnt); 177ac27a0ecSDave Kleikamp return err; 178ac27a0ecSDave Kleikamp } 179617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 180617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 181ac046f1dSPeng Tao int err, err2=0; 182ac27a0ecSDave Kleikamp 1838f82f840SYongqiang Yang err = ext4_resize_begin(sb); 1848f82f840SYongqiang Yang if (err) 1858f82f840SYongqiang Yang return err; 186ac27a0ecSDave Kleikamp 187014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 188014a1770SDjalal Harouni err = -EFAULT; 189014a1770SDjalal Harouni goto group_extend_out; 190014a1770SDjalal Harouni } 191ac27a0ecSDave Kleikamp 192bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 193bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 194bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 195bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 196014a1770SDjalal Harouni err = -EOPNOTSUPP; 197014a1770SDjalal Harouni goto group_extend_out; 198bab08ab9STheodore Ts'o } 199bab08ab9STheodore Ts'o 20042a74f20SDave Hansen err = mnt_want_write(filp->f_path.mnt); 20142a74f20SDave Hansen if (err) 202014a1770SDjalal Harouni goto group_extend_out; 20342a74f20SDave Hansen 204617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 205ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 206dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 2077ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 208dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 209ac046f1dSPeng Tao } 2107ffe1ea8SHidehiro Kawai if (err == 0) 2117ffe1ea8SHidehiro Kawai err = err2; 212ac27a0ecSDave Kleikamp 213014a1770SDjalal Harouni mnt_drop_write(filp->f_path.mnt); 214014a1770SDjalal Harouni group_extend_out: 215014a1770SDjalal Harouni ext4_resize_end(sb); 216ac27a0ecSDave Kleikamp return err; 217ac27a0ecSDave Kleikamp } 218748de673SAkira Fujita 219748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 220748de673SAkira Fujita struct move_extent me; 221748de673SAkira Fujita struct file *donor_filp; 222748de673SAkira Fujita int err; 223748de673SAkira Fujita 2244a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 2254a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 2264a58579bSAkira Fujita return -EBADF; 2274a58579bSAkira Fujita 228748de673SAkira Fujita if (copy_from_user(&me, 229748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 230748de673SAkira Fujita return -EFAULT; 2314a58579bSAkira Fujita me.moved_len = 0; 232748de673SAkira Fujita 233748de673SAkira Fujita donor_filp = fget(me.donor_fd); 234748de673SAkira Fujita if (!donor_filp) 235748de673SAkira Fujita return -EBADF; 236748de673SAkira Fujita 2374a58579bSAkira Fujita if (!(donor_filp->f_mode & FMODE_WRITE)) { 2384a58579bSAkira Fujita err = -EBADF; 2394a58579bSAkira Fujita goto mext_out; 240748de673SAkira Fujita } 241748de673SAkira Fujita 242bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 243bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 244bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 245bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 246bab08ab9STheodore Ts'o return -EOPNOTSUPP; 247bab08ab9STheodore Ts'o } 248bab08ab9STheodore Ts'o 2494a58579bSAkira Fujita err = mnt_want_write(filp->f_path.mnt); 2504a58579bSAkira Fujita if (err) 2514a58579bSAkira Fujita goto mext_out; 2524a58579bSAkira Fujita 253748de673SAkira Fujita err = ext4_move_extents(filp, donor_filp, me.orig_start, 254748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 2554a58579bSAkira Fujita mnt_drop_write(filp->f_path.mnt); 256748de673SAkira Fujita 257c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 258c437b273SAkira Fujita &me, sizeof(me))) 2594a58579bSAkira Fujita err = -EFAULT; 2604a58579bSAkira Fujita mext_out: 2614a58579bSAkira Fujita fput(donor_filp); 262748de673SAkira Fujita return err; 263748de673SAkira Fujita } 264748de673SAkira Fujita 265617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 266617ba13bSMingming Cao struct ext4_new_group_data input; 267ac046f1dSPeng Tao int err, err2=0; 268ac27a0ecSDave Kleikamp 2698f82f840SYongqiang Yang err = ext4_resize_begin(sb); 2708f82f840SYongqiang Yang if (err) 2718f82f840SYongqiang Yang return err; 272ac27a0ecSDave Kleikamp 273617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 274014a1770SDjalal Harouni sizeof(input))) { 275014a1770SDjalal Harouni err = -EFAULT; 276014a1770SDjalal Harouni goto group_add_out; 277014a1770SDjalal Harouni } 278ac27a0ecSDave Kleikamp 279bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 280bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 281bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 282bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 283014a1770SDjalal Harouni err = -EOPNOTSUPP; 284014a1770SDjalal Harouni goto group_add_out; 285bab08ab9STheodore Ts'o } 286bab08ab9STheodore Ts'o 28742a74f20SDave Hansen err = mnt_want_write(filp->f_path.mnt); 28842a74f20SDave Hansen if (err) 289014a1770SDjalal Harouni goto group_add_out; 29042a74f20SDave Hansen 291617ba13bSMingming Cao err = ext4_group_add(sb, &input); 292ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 293dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 2947ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 295dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 296ac046f1dSPeng Tao } 2977ffe1ea8SHidehiro Kawai if (err == 0) 2987ffe1ea8SHidehiro Kawai err = err2; 299ac27a0ecSDave Kleikamp 300014a1770SDjalal Harouni mnt_drop_write(filp->f_path.mnt); 301014a1770SDjalal Harouni group_add_out: 302014a1770SDjalal Harouni ext4_resize_end(sb); 303ac27a0ecSDave Kleikamp return err; 304ac27a0ecSDave Kleikamp } 305ac27a0ecSDave Kleikamp 306c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 3072a43a878SAneesh Kumar K.V { 3082a43a878SAneesh Kumar K.V int err; 3092e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 3102a43a878SAneesh Kumar K.V return -EACCES; 3112a43a878SAneesh Kumar K.V 3122a43a878SAneesh Kumar K.V err = mnt_want_write(filp->f_path.mnt); 3132a43a878SAneesh Kumar K.V if (err) 3142a43a878SAneesh Kumar K.V return err; 3152a43a878SAneesh Kumar K.V /* 3162a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 3172a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 3182a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 3192a43a878SAneesh Kumar K.V * inode format to prevent read. 3202a43a878SAneesh Kumar K.V */ 3212a43a878SAneesh Kumar K.V mutex_lock(&(inode->i_mutex)); 3222a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 3232a43a878SAneesh Kumar K.V mutex_unlock(&(inode->i_mutex)); 3242a43a878SAneesh Kumar K.V mnt_drop_write(filp->f_path.mnt); 3252a43a878SAneesh Kumar K.V return err; 3262a43a878SAneesh Kumar K.V } 327c14c6fd5SAneesh Kumar K.V 328ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 329ccd2506bSTheodore Ts'o { 330ccd2506bSTheodore Ts'o int err; 3312e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 332ccd2506bSTheodore Ts'o return -EACCES; 333ccd2506bSTheodore Ts'o 334ccd2506bSTheodore Ts'o err = mnt_want_write(filp->f_path.mnt); 335ccd2506bSTheodore Ts'o if (err) 336ccd2506bSTheodore Ts'o return err; 337ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 338ccd2506bSTheodore Ts'o mnt_drop_write(filp->f_path.mnt); 339ccd2506bSTheodore Ts'o return err; 340ccd2506bSTheodore Ts'o } 341ccd2506bSTheodore Ts'o 34219c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 34319c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 34419c5246dSYongqiang Yang struct super_block *sb = inode->i_sb; 34519c5246dSYongqiang Yang int err = 0, err2 = 0; 34619c5246dSYongqiang Yang 34719c5246dSYongqiang Yang if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34819c5246dSYongqiang Yang EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 34919c5246dSYongqiang Yang ext4_msg(sb, KERN_ERR, 35019c5246dSYongqiang Yang "Online resizing not (yet) supported with bigalloc"); 35119c5246dSYongqiang Yang return -EOPNOTSUPP; 35219c5246dSYongqiang Yang } 35319c5246dSYongqiang Yang 35419c5246dSYongqiang Yang if (EXT4_HAS_INCOMPAT_FEATURE(sb, 35519c5246dSYongqiang Yang EXT4_FEATURE_INCOMPAT_META_BG)) { 35619c5246dSYongqiang Yang ext4_msg(sb, KERN_ERR, 35719c5246dSYongqiang Yang "Online resizing not (yet) supported with meta_bg"); 35819c5246dSYongqiang Yang return -EOPNOTSUPP; 35919c5246dSYongqiang Yang } 36019c5246dSYongqiang Yang 36119c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 36219c5246dSYongqiang Yang sizeof(__u64))) { 36319c5246dSYongqiang Yang return -EFAULT; 36419c5246dSYongqiang Yang } 36519c5246dSYongqiang Yang 36619c5246dSYongqiang Yang if (n_blocks_count > MAX_32_NUM && 36719c5246dSYongqiang Yang !EXT4_HAS_INCOMPAT_FEATURE(sb, 36819c5246dSYongqiang Yang EXT4_FEATURE_INCOMPAT_64BIT)) { 36919c5246dSYongqiang Yang ext4_msg(sb, KERN_ERR, 37019c5246dSYongqiang Yang "File system only supports 32-bit block numbers"); 37119c5246dSYongqiang Yang return -EOPNOTSUPP; 37219c5246dSYongqiang Yang } 37319c5246dSYongqiang Yang 37419c5246dSYongqiang Yang err = ext4_resize_begin(sb); 37519c5246dSYongqiang Yang if (err) 37619c5246dSYongqiang Yang return err; 37719c5246dSYongqiang Yang 37819c5246dSYongqiang Yang err = mnt_want_write(filp->f_path.mnt); 37919c5246dSYongqiang Yang if (err) 38019c5246dSYongqiang Yang goto resizefs_out; 38119c5246dSYongqiang Yang 38219c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 38319c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 38419c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 38519c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 38619c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 38719c5246dSYongqiang Yang } 38819c5246dSYongqiang Yang if (err == 0) 38919c5246dSYongqiang Yang err = err2; 39019c5246dSYongqiang Yang mnt_drop_write(filp->f_path.mnt); 39119c5246dSYongqiang Yang resizefs_out: 39219c5246dSYongqiang Yang ext4_resize_end(sb); 39319c5246dSYongqiang Yang return err; 39419c5246dSYongqiang Yang } 39519c5246dSYongqiang Yang 396e681c047SLukas Czerner case FITRIM: 397e681c047SLukas Czerner { 39841431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 399e681c047SLukas Czerner struct fstrim_range range; 400e681c047SLukas Czerner int ret = 0; 401e681c047SLukas Czerner 402e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 403e681c047SLukas Czerner return -EPERM; 404e681c047SLukas Czerner 40541431792SLukas Czerner if (!blk_queue_discard(q)) 40641431792SLukas Czerner return -EOPNOTSUPP; 40741431792SLukas Czerner 408bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 409bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 410bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 411bab08ab9STheodore Ts'o "FITRIM not supported with bigalloc"); 412bab08ab9STheodore Ts'o return -EOPNOTSUPP; 413bab08ab9STheodore Ts'o } 414bab08ab9STheodore Ts'o 415e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 416e681c047SLukas Czerner sizeof(range))) 417e681c047SLukas Czerner return -EFAULT; 418e681c047SLukas Czerner 4195c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 4205c2ed62fSLukas Czerner q->limits.discard_granularity); 421e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 422e681c047SLukas Czerner if (ret < 0) 423e681c047SLukas Czerner return ret; 424e681c047SLukas Czerner 425e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 426e681c047SLukas Czerner sizeof(range))) 427e681c047SLukas Czerner return -EFAULT; 428e681c047SLukas Czerner 429e681c047SLukas Czerner return 0; 430e681c047SLukas Czerner } 431e681c047SLukas Czerner 432ac27a0ecSDave Kleikamp default: 433ac27a0ecSDave Kleikamp return -ENOTTY; 434ac27a0ecSDave Kleikamp } 435ac27a0ecSDave Kleikamp } 436ac27a0ecSDave Kleikamp 437ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 438617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 439ac27a0ecSDave Kleikamp { 440ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 441ac27a0ecSDave Kleikamp switch (cmd) { 442617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 443617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 444ac27a0ecSDave Kleikamp break; 445617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 446617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 447ac27a0ecSDave Kleikamp break; 448617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 449617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 450ac27a0ecSDave Kleikamp break; 451617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 452617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 453ac27a0ecSDave Kleikamp break; 454617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 455617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 456ac27a0ecSDave Kleikamp break; 457617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 458617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 459ac27a0ecSDave Kleikamp break; 460617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 461617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 462ac27a0ecSDave Kleikamp break; 463617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 464617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 465ac27a0ecSDave Kleikamp break; 466617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 467617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 468ac27a0ecSDave Kleikamp break; 4694d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 4704d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 4714d92dc0fSBen Hutchings struct ext4_new_group_input input; 4724d92dc0fSBen Hutchings mm_segment_t old_fs; 4734d92dc0fSBen Hutchings int err; 4744d92dc0fSBen Hutchings 4754d92dc0fSBen Hutchings uinput = compat_ptr(arg); 4764d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 4774d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 4784d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 4794d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 4804d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 4814d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 4824d92dc0fSBen Hutchings &uinput->reserved_blocks); 4834d92dc0fSBen Hutchings if (err) 4844d92dc0fSBen Hutchings return -EFAULT; 4854d92dc0fSBen Hutchings old_fs = get_fs(); 4864d92dc0fSBen Hutchings set_fs(KERNEL_DS); 4874d92dc0fSBen Hutchings err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 4884d92dc0fSBen Hutchings (unsigned long) &input); 4894d92dc0fSBen Hutchings set_fs(old_fs); 4904d92dc0fSBen Hutchings return err; 4914d92dc0fSBen Hutchings } 492b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 493a56e69c2STao Ma case FITRIM: 49419c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 495b684b2eeSChristian Borntraeger break; 496ac27a0ecSDave Kleikamp default: 497ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 498ac27a0ecSDave Kleikamp } 4995cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 500ac27a0ecSDave Kleikamp } 501ac27a0ecSDave Kleikamp #endif 502