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 { 25496ad9aaSAl Viro struct inode *inode = file_inode(filp); 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; 4179906964STheodore Ts'o unsigned int oldflags, mask, i; 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 50a561be71SAl Viro err = mnt_want_write_file(filp); 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 } 86996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 874db46fc2SAneesh Kumar K.V migrate = 1; 88ac27a0ecSDave Kleikamp 89c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 90c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 91c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 92c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 93c8d46e41SJiaying Zhang goto flags_out; 94c8d46e41SJiaying Zhang } 95c8d46e41SJiaying Zhang } else if (oldflags & EXT4_EOFBLOCKS_FL) 96c8d46e41SJiaying Zhang ext4_truncate(inode); 97c8d46e41SJiaying Zhang 989924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 99ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 10042a74f20SDave Hansen err = PTR_ERR(handle); 10142a74f20SDave Hansen goto flags_out; 102ac27a0ecSDave Kleikamp } 103ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 1040390131bSFrank Mayhar ext4_handle_sync(handle); 105617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 106ac27a0ecSDave Kleikamp if (err) 107ac27a0ecSDave Kleikamp goto flags_err; 108ac27a0ecSDave Kleikamp 10979906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 11079906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 11179906964STheodore Ts'o continue; 11279906964STheodore Ts'o if (mask & flags) 11379906964STheodore Ts'o ext4_set_inode_flag(inode, i); 11479906964STheodore Ts'o else 11579906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 11679906964STheodore Ts'o } 117ac27a0ecSDave Kleikamp 118617ba13bSMingming Cao ext4_set_inode_flags(inode); 119ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 120ac27a0ecSDave Kleikamp 121617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 122ac27a0ecSDave Kleikamp flags_err: 123617ba13bSMingming Cao ext4_journal_stop(handle); 12442a74f20SDave Hansen if (err) 12542a74f20SDave Hansen goto flags_out; 126ac27a0ecSDave Kleikamp 127617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) 128617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 1294db46fc2SAneesh Kumar K.V if (err) 1304db46fc2SAneesh Kumar K.V goto flags_out; 131996bb9fdSTheodore Ts'o if (migrate) { 132996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 1334db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 134996bb9fdSTheodore Ts'o else 135996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 136996bb9fdSTheodore Ts'o } 137996bb9fdSTheodore Ts'o 13842a74f20SDave Hansen flags_out: 139ac27a0ecSDave Kleikamp mutex_unlock(&inode->i_mutex); 1402a79f17eSAl Viro mnt_drop_write_file(filp); 141ac27a0ecSDave Kleikamp return err; 142ac27a0ecSDave Kleikamp } 143617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 144617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 145ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 146617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 147617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 148ac27a0ecSDave Kleikamp handle_t *handle; 149617ba13bSMingming Cao struct ext4_iloc iloc; 150ac27a0ecSDave Kleikamp __u32 generation; 151ac27a0ecSDave Kleikamp int err; 152ac27a0ecSDave Kleikamp 1532e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 154ac27a0ecSDave Kleikamp return -EPERM; 15542a74f20SDave Hansen 156814525f4SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, 157814525f4SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 158814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 159814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 160814525f4SDarrick J. Wong return -ENOTTY; 161814525f4SDarrick J. Wong } 162814525f4SDarrick J. Wong 163a561be71SAl Viro err = mnt_want_write_file(filp); 16442a74f20SDave Hansen if (err) 16542a74f20SDave Hansen return err; 16642a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 16742a74f20SDave Hansen err = -EFAULT; 16842a74f20SDave Hansen goto setversion_out; 16942a74f20SDave Hansen } 170ac27a0ecSDave Kleikamp 1716c2155b9SDjalal Harouni mutex_lock(&inode->i_mutex); 1729924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 17342a74f20SDave Hansen if (IS_ERR(handle)) { 17442a74f20SDave Hansen err = PTR_ERR(handle); 1756c2155b9SDjalal Harouni goto unlock_out; 17642a74f20SDave Hansen } 177617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 178ac27a0ecSDave Kleikamp if (err == 0) { 179ef7f3835SKalpak Shah inode->i_ctime = ext4_current_time(inode); 180ac27a0ecSDave Kleikamp inode->i_generation = generation; 181617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 182ac27a0ecSDave Kleikamp } 183617ba13bSMingming Cao ext4_journal_stop(handle); 1846c2155b9SDjalal Harouni 1856c2155b9SDjalal Harouni unlock_out: 1866c2155b9SDjalal Harouni mutex_unlock(&inode->i_mutex); 18742a74f20SDave Hansen setversion_out: 1882a79f17eSAl Viro mnt_drop_write_file(filp); 189ac27a0ecSDave Kleikamp return err; 190ac27a0ecSDave Kleikamp } 191617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 192617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 193ac046f1dSPeng Tao int err, err2=0; 194ac27a0ecSDave Kleikamp 1958f82f840SYongqiang Yang err = ext4_resize_begin(sb); 1968f82f840SYongqiang Yang if (err) 1978f82f840SYongqiang Yang return err; 198ac27a0ecSDave Kleikamp 199014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 200014a1770SDjalal Harouni err = -EFAULT; 201014a1770SDjalal Harouni goto group_extend_out; 202014a1770SDjalal Harouni } 203ac27a0ecSDave Kleikamp 204bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 205bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 206bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 207bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 208014a1770SDjalal Harouni err = -EOPNOTSUPP; 209014a1770SDjalal Harouni goto group_extend_out; 210bab08ab9STheodore Ts'o } 211bab08ab9STheodore Ts'o 212a561be71SAl Viro err = mnt_want_write_file(filp); 21342a74f20SDave Hansen if (err) 214014a1770SDjalal Harouni goto group_extend_out; 21542a74f20SDave Hansen 216617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 217ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 218dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 2197ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 220dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 221ac046f1dSPeng Tao } 2227ffe1ea8SHidehiro Kawai if (err == 0) 2237ffe1ea8SHidehiro Kawai err = err2; 2242a79f17eSAl Viro mnt_drop_write_file(filp); 225014a1770SDjalal Harouni group_extend_out: 2268f82f840SYongqiang Yang ext4_resize_end(sb); 227ac27a0ecSDave Kleikamp return err; 228ac27a0ecSDave Kleikamp } 229748de673SAkira Fujita 230748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 231748de673SAkira Fujita struct move_extent me; 2322903ff01SAl Viro struct fd donor; 2332903ff01SAl Viro int err; 234748de673SAkira Fujita 2354a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 2364a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 2374a58579bSAkira Fujita return -EBADF; 2384a58579bSAkira Fujita 239748de673SAkira Fujita if (copy_from_user(&me, 240748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 241748de673SAkira Fujita return -EFAULT; 2424a58579bSAkira Fujita me.moved_len = 0; 243748de673SAkira Fujita 2442903ff01SAl Viro donor = fdget(me.donor_fd); 2452903ff01SAl Viro if (!donor.file) 246748de673SAkira Fujita return -EBADF; 247748de673SAkira Fujita 2482903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 2494a58579bSAkira Fujita err = -EBADF; 2504a58579bSAkira Fujita goto mext_out; 251748de673SAkira Fujita } 252748de673SAkira Fujita 253bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 254bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 255bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 256bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 257399c9b86SAl Viro err = -EOPNOTSUPP; 258399c9b86SAl Viro goto mext_out; 259bab08ab9STheodore Ts'o } 260bab08ab9STheodore Ts'o 261a561be71SAl Viro err = mnt_want_write_file(filp); 2624a58579bSAkira Fujita if (err) 2634a58579bSAkira Fujita goto mext_out; 2644a58579bSAkira Fujita 2652903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 266748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 2672a79f17eSAl Viro mnt_drop_write_file(filp); 268748de673SAkira Fujita 269c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 270c437b273SAkira Fujita &me, sizeof(me))) 2714a58579bSAkira Fujita err = -EFAULT; 2724a58579bSAkira Fujita mext_out: 2732903ff01SAl Viro fdput(donor); 274748de673SAkira Fujita return err; 275748de673SAkira Fujita } 276748de673SAkira Fujita 277617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 278617ba13bSMingming Cao struct ext4_new_group_data input; 279ac046f1dSPeng Tao int err, err2=0; 280ac27a0ecSDave Kleikamp 2818f82f840SYongqiang Yang err = ext4_resize_begin(sb); 2828f82f840SYongqiang Yang if (err) 2838f82f840SYongqiang Yang return err; 284ac27a0ecSDave Kleikamp 285617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 286014a1770SDjalal Harouni sizeof(input))) { 287014a1770SDjalal Harouni err = -EFAULT; 288014a1770SDjalal Harouni goto group_add_out; 289014a1770SDjalal Harouni } 290ac27a0ecSDave Kleikamp 291bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 292bab08ab9STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 293bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 294bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 295014a1770SDjalal Harouni err = -EOPNOTSUPP; 296014a1770SDjalal Harouni goto group_add_out; 297bab08ab9STheodore Ts'o } 298bab08ab9STheodore Ts'o 299a561be71SAl Viro err = mnt_want_write_file(filp); 30042a74f20SDave Hansen if (err) 301014a1770SDjalal Harouni goto group_add_out; 30242a74f20SDave Hansen 303617ba13bSMingming Cao err = ext4_group_add(sb, &input); 304ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 305dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 3067ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 307dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 308ac046f1dSPeng Tao } 3097ffe1ea8SHidehiro Kawai if (err == 0) 3107ffe1ea8SHidehiro Kawai err = err2; 3112a79f17eSAl Viro mnt_drop_write_file(filp); 3127f511862STheodore Ts'o if (!err && ext4_has_group_desc_csum(sb) && 3137f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 3147f511862STheodore Ts'o err = ext4_register_li_request(sb, input.group); 315014a1770SDjalal Harouni group_add_out: 3168f82f840SYongqiang Yang ext4_resize_end(sb); 317ac27a0ecSDave Kleikamp return err; 318ac27a0ecSDave Kleikamp } 319ac27a0ecSDave Kleikamp 320c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 3212a43a878SAneesh Kumar K.V { 3222a43a878SAneesh Kumar K.V int err; 3232e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 3242a43a878SAneesh Kumar K.V return -EACCES; 3252a43a878SAneesh Kumar K.V 326a561be71SAl Viro err = mnt_want_write_file(filp); 3272a43a878SAneesh Kumar K.V if (err) 3282a43a878SAneesh Kumar K.V return err; 3292a43a878SAneesh Kumar K.V /* 3302a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 3312a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 3322a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 3332a43a878SAneesh Kumar K.V * inode format to prevent read. 3342a43a878SAneesh Kumar K.V */ 3352a43a878SAneesh Kumar K.V mutex_lock(&(inode->i_mutex)); 3362a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 3372a43a878SAneesh Kumar K.V mutex_unlock(&(inode->i_mutex)); 3382a79f17eSAl Viro mnt_drop_write_file(filp); 3392a43a878SAneesh Kumar K.V return err; 3402a43a878SAneesh Kumar K.V } 341c14c6fd5SAneesh Kumar K.V 342ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 343ccd2506bSTheodore Ts'o { 344ccd2506bSTheodore Ts'o int err; 3452e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 346ccd2506bSTheodore Ts'o return -EACCES; 347ccd2506bSTheodore Ts'o 348a561be71SAl Viro err = mnt_want_write_file(filp); 349ccd2506bSTheodore Ts'o if (err) 350ccd2506bSTheodore Ts'o return err; 351ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 3522a79f17eSAl Viro mnt_drop_write_file(filp); 353ccd2506bSTheodore Ts'o return err; 354ccd2506bSTheodore Ts'o } 355ccd2506bSTheodore Ts'o 35619c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 35719c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 35819c5246dSYongqiang Yang struct super_block *sb = inode->i_sb; 35919c5246dSYongqiang Yang int err = 0, err2 = 0; 3607f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 36119c5246dSYongqiang Yang 36219c5246dSYongqiang Yang if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 36319c5246dSYongqiang Yang EXT4_FEATURE_RO_COMPAT_BIGALLOC)) { 36419c5246dSYongqiang Yang ext4_msg(sb, KERN_ERR, 36519c5246dSYongqiang Yang "Online resizing not (yet) supported with bigalloc"); 36619c5246dSYongqiang Yang return -EOPNOTSUPP; 36719c5246dSYongqiang Yang } 36819c5246dSYongqiang Yang 36919c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 37019c5246dSYongqiang Yang sizeof(__u64))) { 37119c5246dSYongqiang Yang return -EFAULT; 37219c5246dSYongqiang Yang } 37319c5246dSYongqiang Yang 37419c5246dSYongqiang Yang err = ext4_resize_begin(sb); 37519c5246dSYongqiang Yang if (err) 37619c5246dSYongqiang Yang return err; 37719c5246dSYongqiang Yang 3788cae6f71SAl Viro err = mnt_want_write_file(filp); 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; 3908cae6f71SAl Viro mnt_drop_write_file(filp); 3917f511862STheodore Ts'o if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && 3927f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 3937f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 3947f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 3957f511862STheodore Ts'o 39619c5246dSYongqiang Yang resizefs_out: 39719c5246dSYongqiang Yang ext4_resize_end(sb); 39819c5246dSYongqiang Yang return err; 39919c5246dSYongqiang Yang } 40019c5246dSYongqiang Yang 401e681c047SLukas Czerner case FITRIM: 402e681c047SLukas Czerner { 40341431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 404e681c047SLukas Czerner struct fstrim_range range; 405e681c047SLukas Czerner int ret = 0; 406e681c047SLukas Czerner 407e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 408e681c047SLukas Czerner return -EPERM; 409e681c047SLukas Czerner 41041431792SLukas Czerner if (!blk_queue_discard(q)) 41141431792SLukas Czerner return -EOPNOTSUPP; 41241431792SLukas Czerner 413e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 414e681c047SLukas Czerner sizeof(range))) 415e681c047SLukas Czerner return -EFAULT; 416e681c047SLukas Czerner 4175c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 4185c2ed62fSLukas Czerner q->limits.discard_granularity); 419e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 420e681c047SLukas Czerner if (ret < 0) 421e681c047SLukas Czerner return ret; 422e681c047SLukas Czerner 423e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 424e681c047SLukas Czerner sizeof(range))) 425e681c047SLukas Czerner return -EFAULT; 426e681c047SLukas Czerner 427e681c047SLukas Czerner return 0; 428e681c047SLukas Czerner } 429e681c047SLukas Czerner 430ac27a0ecSDave Kleikamp default: 431ac27a0ecSDave Kleikamp return -ENOTTY; 432ac27a0ecSDave Kleikamp } 433ac27a0ecSDave Kleikamp } 434ac27a0ecSDave Kleikamp 435ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 436617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 437ac27a0ecSDave Kleikamp { 438ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 439ac27a0ecSDave Kleikamp switch (cmd) { 440617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 441617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 442ac27a0ecSDave Kleikamp break; 443617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 444617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 445ac27a0ecSDave Kleikamp break; 446617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 447617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 448ac27a0ecSDave Kleikamp break; 449617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 450617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 451ac27a0ecSDave Kleikamp break; 452617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 453617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 454ac27a0ecSDave Kleikamp break; 455617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 456617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 457ac27a0ecSDave Kleikamp break; 458617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 459617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 460ac27a0ecSDave Kleikamp break; 461617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 462617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 463ac27a0ecSDave Kleikamp break; 464617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 465617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 466ac27a0ecSDave Kleikamp break; 4674d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 4684d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 4694d92dc0fSBen Hutchings struct ext4_new_group_input input; 4704d92dc0fSBen Hutchings mm_segment_t old_fs; 4714d92dc0fSBen Hutchings int err; 4724d92dc0fSBen Hutchings 4734d92dc0fSBen Hutchings uinput = compat_ptr(arg); 4744d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 4754d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 4764d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 4774d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 4784d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 4794d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 4804d92dc0fSBen Hutchings &uinput->reserved_blocks); 4814d92dc0fSBen Hutchings if (err) 4824d92dc0fSBen Hutchings return -EFAULT; 4834d92dc0fSBen Hutchings old_fs = get_fs(); 4844d92dc0fSBen Hutchings set_fs(KERNEL_DS); 4854d92dc0fSBen Hutchings err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, 4864d92dc0fSBen Hutchings (unsigned long) &input); 4874d92dc0fSBen Hutchings set_fs(old_fs); 4884d92dc0fSBen Hutchings return err; 4894d92dc0fSBen Hutchings } 490b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 491a56e69c2STao Ma case FITRIM: 49219c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 493b684b2eeSChristian Borntraeger break; 494ac27a0ecSDave Kleikamp default: 495ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 496ac27a0ecSDave Kleikamp } 4975cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 498ac27a0ecSDave Kleikamp } 499ac27a0ecSDave Kleikamp #endif 500