1b2441318SGreg Kroah-Hartman // SPDX-License-Identifier: GPL-2.0 2ac27a0ecSDave Kleikamp /* 3617ba13bSMingming Cao * linux/fs/ext4/ioctl.c 4ac27a0ecSDave Kleikamp * 5ac27a0ecSDave Kleikamp * Copyright (C) 1993, 1994, 1995 6ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 7ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 8ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 9ac27a0ecSDave Kleikamp */ 10ac27a0ecSDave Kleikamp 11ac27a0ecSDave Kleikamp #include <linux/fs.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> 179b7365fcSLi Xi #include <linux/quotaops.h> 1823253068STheodore Ts'o #include <linux/random.h> 198da4b8c4SAndy Shevchenko #include <linux/uuid.h> 207c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 21783d9485STheodore Ts'o #include <linux/delay.h> 22ee73f9a5SJeff Layton #include <linux/iversion.h> 233dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 243dcf5451SChristoph Hellwig #include "ext4.h" 250c9ec4beSDarrick J. Wong #include <linux/fsmap.h> 260c9ec4beSDarrick J. Wong #include "fsmap.h" 270c9ec4beSDarrick J. Wong #include <trace/events/ext4.h> 28ac27a0ecSDave Kleikamp 29393d1d1dSDr. Tilmann Bubeck /** 30393d1d1dSDr. Tilmann Bubeck * Swap memory between @a and @b for @len bytes. 31393d1d1dSDr. Tilmann Bubeck * 32393d1d1dSDr. Tilmann Bubeck * @a: pointer to first memory area 33393d1d1dSDr. Tilmann Bubeck * @b: pointer to second memory area 34393d1d1dSDr. Tilmann Bubeck * @len: number of bytes to swap 35393d1d1dSDr. Tilmann Bubeck * 36393d1d1dSDr. Tilmann Bubeck */ 37393d1d1dSDr. Tilmann Bubeck static void memswap(void *a, void *b, size_t len) 38393d1d1dSDr. Tilmann Bubeck { 39393d1d1dSDr. Tilmann Bubeck unsigned char *ap, *bp; 40393d1d1dSDr. Tilmann Bubeck 41393d1d1dSDr. Tilmann Bubeck ap = (unsigned char *)a; 42393d1d1dSDr. Tilmann Bubeck bp = (unsigned char *)b; 43393d1d1dSDr. Tilmann Bubeck while (len-- > 0) { 444b7e2db5SFabian Frederick swap(*ap, *bp); 45393d1d1dSDr. Tilmann Bubeck ap++; 46393d1d1dSDr. Tilmann Bubeck bp++; 47393d1d1dSDr. Tilmann Bubeck } 48393d1d1dSDr. Tilmann Bubeck } 49393d1d1dSDr. Tilmann Bubeck 50393d1d1dSDr. Tilmann Bubeck /** 51393d1d1dSDr. Tilmann Bubeck * Swap i_data and associated attributes between @inode1 and @inode2. 52393d1d1dSDr. Tilmann Bubeck * This function is used for the primary swap between inode1 and inode2 53393d1d1dSDr. Tilmann Bubeck * and also to revert this primary swap in case of errors. 54393d1d1dSDr. Tilmann Bubeck * 55393d1d1dSDr. Tilmann Bubeck * Therefore you have to make sure, that calling this method twice 56393d1d1dSDr. Tilmann Bubeck * will revert all changes. 57393d1d1dSDr. Tilmann Bubeck * 58393d1d1dSDr. Tilmann Bubeck * @inode1: pointer to first inode 59393d1d1dSDr. Tilmann Bubeck * @inode2: pointer to second inode 60393d1d1dSDr. Tilmann Bubeck */ 61393d1d1dSDr. Tilmann Bubeck static void swap_inode_data(struct inode *inode1, struct inode *inode2) 62393d1d1dSDr. Tilmann Bubeck { 63393d1d1dSDr. Tilmann Bubeck loff_t isize; 64393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei1; 65393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei2; 66abdc644eSyangerkun unsigned long tmp; 67393d1d1dSDr. Tilmann Bubeck 68393d1d1dSDr. Tilmann Bubeck ei1 = EXT4_I(inode1); 69393d1d1dSDr. Tilmann Bubeck ei2 = EXT4_I(inode2); 70393d1d1dSDr. Tilmann Bubeck 719c5d58fbSJeff Layton swap(inode1->i_version, inode2->i_version); 729c5d58fbSJeff Layton swap(inode1->i_atime, inode2->i_atime); 739c5d58fbSJeff Layton swap(inode1->i_mtime, inode2->i_mtime); 74393d1d1dSDr. Tilmann Bubeck 75393d1d1dSDr. Tilmann Bubeck memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); 76abdc644eSyangerkun tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP; 77abdc644eSyangerkun ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) | 78abdc644eSyangerkun (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP); 79abdc644eSyangerkun ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP); 809c5d58fbSJeff Layton swap(ei1->i_disksize, ei2->i_disksize); 81cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); 82cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); 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 8918aded17STheodore Ts'o static void reset_inode_seed(struct inode *inode) 9018aded17STheodore Ts'o { 9118aded17STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 9218aded17STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); 9318aded17STheodore Ts'o __le32 inum = cpu_to_le32(inode->i_ino); 9418aded17STheodore Ts'o __le32 gen = cpu_to_le32(inode->i_generation); 9518aded17STheodore Ts'o __u32 csum; 9618aded17STheodore Ts'o 9718aded17STheodore Ts'o if (!ext4_has_metadata_csum(inode->i_sb)) 9818aded17STheodore Ts'o return; 9918aded17STheodore Ts'o 10018aded17STheodore Ts'o csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum)); 10118aded17STheodore Ts'o ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen)); 10218aded17STheodore Ts'o } 10318aded17STheodore Ts'o 104393d1d1dSDr. Tilmann Bubeck /** 105393d1d1dSDr. Tilmann Bubeck * Swap the information from the given @inode and the inode 106393d1d1dSDr. Tilmann Bubeck * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 107393d1d1dSDr. Tilmann Bubeck * important fields of the inodes. 108393d1d1dSDr. Tilmann Bubeck * 109393d1d1dSDr. Tilmann Bubeck * @sb: the super block of the filesystem 110393d1d1dSDr. Tilmann Bubeck * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 111393d1d1dSDr. Tilmann Bubeck * 112393d1d1dSDr. Tilmann Bubeck */ 113393d1d1dSDr. Tilmann Bubeck static long swap_inode_boot_loader(struct super_block *sb, 114393d1d1dSDr. Tilmann Bubeck struct inode *inode) 115393d1d1dSDr. Tilmann Bubeck { 116393d1d1dSDr. Tilmann Bubeck handle_t *handle; 117393d1d1dSDr. Tilmann Bubeck int err; 118393d1d1dSDr. Tilmann Bubeck struct inode *inode_bl; 119393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei_bl; 120aa507b5fSyangerkun qsize_t size, size_bl, diff; 121aa507b5fSyangerkun blkcnt_t blocks; 122aa507b5fSyangerkun unsigned short bytes; 123393d1d1dSDr. Tilmann Bubeck 1248a363970STheodore Ts'o inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL); 125d8558a29STheodore Ts'o if (IS_ERR(inode_bl)) 126d8558a29STheodore Ts'o return PTR_ERR(inode_bl); 127393d1d1dSDr. Tilmann Bubeck ei_bl = EXT4_I(inode_bl); 128393d1d1dSDr. Tilmann Bubeck 129393d1d1dSDr. Tilmann Bubeck /* Protect orig inodes against a truncate and make sure, 130393d1d1dSDr. Tilmann Bubeck * that only 1 swap_inode_boot_loader is running. */ 131375e289eSJ. Bruce Fields lock_two_nondirectories(inode, inode_bl); 132393d1d1dSDr. Tilmann Bubeck 13367a11611Syangerkun if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) || 13467a11611Syangerkun IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) || 1356e589291STheodore Ts'o (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) || 13667a11611Syangerkun ext4_has_inline_data(inode)) { 13767a11611Syangerkun err = -EINVAL; 13867a11611Syangerkun goto journal_err_out; 13967a11611Syangerkun } 14067a11611Syangerkun 14167a11611Syangerkun if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) || 14267a11611Syangerkun !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) { 14367a11611Syangerkun err = -EPERM; 14467a11611Syangerkun goto journal_err_out; 14567a11611Syangerkun } 14667a11611Syangerkun 147a46c68a3Syangerkun down_write(&EXT4_I(inode)->i_mmap_sem); 148a46c68a3Syangerkun err = filemap_write_and_wait(inode->i_mapping); 149a46c68a3Syangerkun if (err) 150a46c68a3Syangerkun goto err_out; 151a46c68a3Syangerkun 152a46c68a3Syangerkun err = filemap_write_and_wait(inode_bl->i_mapping); 153a46c68a3Syangerkun if (err) 154a46c68a3Syangerkun goto err_out; 155a46c68a3Syangerkun 156393d1d1dSDr. Tilmann Bubeck /* Wait for all existing dio workers */ 157393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode); 158393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode_bl); 159393d1d1dSDr. Tilmann Bubeck 16018aded17STheodore Ts'o truncate_inode_pages(&inode->i_data, 0); 16118aded17STheodore Ts'o truncate_inode_pages(&inode_bl->i_data, 0); 16218aded17STheodore Ts'o 163393d1d1dSDr. Tilmann Bubeck handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 164393d1d1dSDr. Tilmann Bubeck if (IS_ERR(handle)) { 165393d1d1dSDr. Tilmann Bubeck err = -EINVAL; 166a46c68a3Syangerkun goto err_out; 167393d1d1dSDr. Tilmann Bubeck } 168393d1d1dSDr. Tilmann Bubeck 169393d1d1dSDr. Tilmann Bubeck /* Protect extent tree against block allocations via delalloc */ 170393d1d1dSDr. Tilmann Bubeck ext4_double_down_write_data_sem(inode, inode_bl); 171393d1d1dSDr. Tilmann Bubeck 172393d1d1dSDr. Tilmann Bubeck if (inode_bl->i_nlink == 0) { 173393d1d1dSDr. Tilmann Bubeck /* this inode has never been used as a BOOT_LOADER */ 174393d1d1dSDr. Tilmann Bubeck set_nlink(inode_bl, 1); 175393d1d1dSDr. Tilmann Bubeck i_uid_write(inode_bl, 0); 176393d1d1dSDr. Tilmann Bubeck i_gid_write(inode_bl, 0); 177393d1d1dSDr. Tilmann Bubeck inode_bl->i_flags = 0; 178393d1d1dSDr. Tilmann Bubeck ei_bl->i_flags = 0; 179ee73f9a5SJeff Layton inode_set_iversion(inode_bl, 1); 180393d1d1dSDr. Tilmann Bubeck i_size_write(inode_bl, 0); 181393d1d1dSDr. Tilmann Bubeck inode_bl->i_mode = S_IFREG; 182e2b911c5SDarrick J. Wong if (ext4_has_feature_extents(sb)) { 183393d1d1dSDr. Tilmann Bubeck ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 184393d1d1dSDr. Tilmann Bubeck ext4_ext_tree_init(handle, inode_bl); 185393d1d1dSDr. Tilmann Bubeck } else 186393d1d1dSDr. Tilmann Bubeck memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 187393d1d1dSDr. Tilmann Bubeck } 188393d1d1dSDr. Tilmann Bubeck 189aa507b5fSyangerkun err = dquot_initialize(inode); 190aa507b5fSyangerkun if (err) 191aa507b5fSyangerkun goto err_out1; 192aa507b5fSyangerkun 193aa507b5fSyangerkun size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes; 194aa507b5fSyangerkun size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes; 195aa507b5fSyangerkun diff = size - size_bl; 196393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 197393d1d1dSDr. Tilmann Bubeck 198eeca7ea1SDeepa Dinamani inode->i_ctime = inode_bl->i_ctime = current_time(inode); 199393d1d1dSDr. Tilmann Bubeck 20023253068STheodore Ts'o inode->i_generation = prandom_u32(); 20123253068STheodore Ts'o inode_bl->i_generation = prandom_u32(); 20218aded17STheodore Ts'o reset_inode_seed(inode); 20318aded17STheodore Ts'o reset_inode_seed(inode_bl); 204393d1d1dSDr. Tilmann Bubeck 205393d1d1dSDr. Tilmann Bubeck ext4_discard_preallocations(inode); 206393d1d1dSDr. Tilmann Bubeck 207393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode); 208393d1d1dSDr. Tilmann Bubeck if (err < 0) { 209aa507b5fSyangerkun /* No need to update quota information. */ 210393d1d1dSDr. Tilmann Bubeck ext4_warning(inode->i_sb, 211393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 212393d1d1dSDr. Tilmann Bubeck inode->i_ino, err); 213393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 214393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 21518aded17STheodore Ts'o ext4_mark_inode_dirty(handle, inode); 216aa507b5fSyangerkun goto err_out1; 217aa507b5fSyangerkun } 218aa507b5fSyangerkun 219aa507b5fSyangerkun blocks = inode_bl->i_blocks; 220aa507b5fSyangerkun bytes = inode_bl->i_bytes; 221aa507b5fSyangerkun inode_bl->i_blocks = inode->i_blocks; 222aa507b5fSyangerkun inode_bl->i_bytes = inode->i_bytes; 223393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode_bl); 224393d1d1dSDr. Tilmann Bubeck if (err < 0) { 225aa507b5fSyangerkun /* No need to update quota information. */ 226393d1d1dSDr. Tilmann Bubeck ext4_warning(inode_bl->i_sb, 227393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 228393d1d1dSDr. Tilmann Bubeck inode_bl->i_ino, err); 229aa507b5fSyangerkun goto revert; 230aa507b5fSyangerkun } 231aa507b5fSyangerkun 232aa507b5fSyangerkun /* Bootloader inode should not be counted into quota information. */ 233aa507b5fSyangerkun if (diff > 0) 234aa507b5fSyangerkun dquot_free_space(inode, diff); 235aa507b5fSyangerkun else 236aa507b5fSyangerkun err = dquot_alloc_space(inode, -1 * diff); 237aa507b5fSyangerkun 238aa507b5fSyangerkun if (err < 0) { 239aa507b5fSyangerkun revert: 240393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 241aa507b5fSyangerkun inode_bl->i_blocks = blocks; 242aa507b5fSyangerkun inode_bl->i_bytes = bytes; 243393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 244393d1d1dSDr. Tilmann Bubeck ext4_mark_inode_dirty(handle, inode); 24518aded17STheodore Ts'o ext4_mark_inode_dirty(handle, inode_bl); 246393d1d1dSDr. Tilmann Bubeck } 247aa507b5fSyangerkun 248aa507b5fSyangerkun err_out1: 249393d1d1dSDr. Tilmann Bubeck ext4_journal_stop(handle); 250393d1d1dSDr. Tilmann Bubeck ext4_double_up_write_data_sem(inode, inode_bl); 251393d1d1dSDr. Tilmann Bubeck 252a46c68a3Syangerkun err_out: 253a46c68a3Syangerkun up_write(&EXT4_I(inode)->i_mmap_sem); 25430d29b11SZheng Liu journal_err_out: 255375e289eSJ. Bruce Fields unlock_two_nondirectories(inode, inode_bl); 256393d1d1dSDr. Tilmann Bubeck iput(inode_bl); 257393d1d1dSDr. Tilmann Bubeck return err; 258393d1d1dSDr. Tilmann Bubeck } 259393d1d1dSDr. Tilmann Bubeck 260643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 2619bd8212fSMichael Halcrow static int uuid_is_zero(__u8 u[16]) 2629bd8212fSMichael Halcrow { 2639bd8212fSMichael Halcrow int i; 2649bd8212fSMichael Halcrow 2659bd8212fSMichael Halcrow for (i = 0; i < 16; i++) 2669bd8212fSMichael Halcrow if (u[i]) 2679bd8212fSMichael Halcrow return 0; 2689bd8212fSMichael Halcrow return 1; 2699bd8212fSMichael Halcrow } 270ba679017SEric Biggers #endif 2719bd8212fSMichael Halcrow 2729b7365fcSLi Xi static int ext4_ioctl_setflags(struct inode *inode, 2739b7365fcSLi Xi unsigned int flags) 274ac27a0ecSDave Kleikamp { 275617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 276ac27a0ecSDave Kleikamp handle_t *handle = NULL; 277fdde368eSAnton Protopopov int err = -EPERM, migrate = 0; 278617ba13bSMingming Cao struct ext4_iloc iloc; 27979906964STheodore Ts'o unsigned int oldflags, mask, i; 280ac27a0ecSDave Kleikamp unsigned int jflag; 281b886ee3eSGabriel Krisman Bertazi struct super_block *sb = inode->i_sb; 282ac27a0ecSDave Kleikamp 283e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 28402749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 28542a74f20SDave Hansen goto flags_out; 28642a74f20SDave Hansen 287ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 288ac27a0ecSDave Kleikamp 289ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 290617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 291ac27a0ecSDave Kleikamp 292ac27a0ecSDave Kleikamp /* 293ac27a0ecSDave Kleikamp * The IMMUTABLE and APPEND_ONLY flags can only be changed by 294ac27a0ecSDave Kleikamp * the relevant capability. 295ac27a0ecSDave Kleikamp * 296ac27a0ecSDave Kleikamp * This test looks nicer. Thanks to Pauline Middelink 297ac27a0ecSDave Kleikamp */ 298617ba13bSMingming Cao if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { 29942a74f20SDave Hansen if (!capable(CAP_LINUX_IMMUTABLE)) 30042a74f20SDave Hansen goto flags_out; 301ac27a0ecSDave Kleikamp } 302ac27a0ecSDave Kleikamp 303ac27a0ecSDave Kleikamp /* 304ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 305ac27a0ecSDave Kleikamp * the relevant capability. 306ac27a0ecSDave Kleikamp */ 307617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 30842a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 30942a74f20SDave Hansen goto flags_out; 310ac27a0ecSDave Kleikamp } 311996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 3124db46fc2SAneesh Kumar K.V migrate = 1; 313ac27a0ecSDave Kleikamp 314c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 315c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 316c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 317c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 318c8d46e41SJiaying Zhang goto flags_out; 319c8d46e41SJiaying Zhang } 3202c98eb5eSTheodore Ts'o } else if (oldflags & EXT4_EOFBLOCKS_FL) { 3212c98eb5eSTheodore Ts'o err = ext4_truncate(inode); 3222c98eb5eSTheodore Ts'o if (err) 3232c98eb5eSTheodore Ts'o goto flags_out; 3242c98eb5eSTheodore Ts'o } 325c8d46e41SJiaying Zhang 326b886ee3eSGabriel Krisman Bertazi if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) { 327b886ee3eSGabriel Krisman Bertazi if (!ext4_has_feature_casefold(sb)) { 328b886ee3eSGabriel Krisman Bertazi err = -EOPNOTSUPP; 329b886ee3eSGabriel Krisman Bertazi goto flags_out; 330b886ee3eSGabriel Krisman Bertazi } 331b886ee3eSGabriel Krisman Bertazi 332b886ee3eSGabriel Krisman Bertazi if (!S_ISDIR(inode->i_mode)) { 333b886ee3eSGabriel Krisman Bertazi err = -ENOTDIR; 334b886ee3eSGabriel Krisman Bertazi goto flags_out; 335b886ee3eSGabriel Krisman Bertazi } 336b886ee3eSGabriel Krisman Bertazi 337b886ee3eSGabriel Krisman Bertazi if (!ext4_empty_dir(inode)) { 338b886ee3eSGabriel Krisman Bertazi err = -ENOTEMPTY; 339b886ee3eSGabriel Krisman Bertazi goto flags_out; 340b886ee3eSGabriel Krisman Bertazi } 341b886ee3eSGabriel Krisman Bertazi } 342b886ee3eSGabriel Krisman Bertazi 3439924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 344ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 34542a74f20SDave Hansen err = PTR_ERR(handle); 34642a74f20SDave Hansen goto flags_out; 347ac27a0ecSDave Kleikamp } 348ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 3490390131bSFrank Mayhar ext4_handle_sync(handle); 350617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 351ac27a0ecSDave Kleikamp if (err) 352ac27a0ecSDave Kleikamp goto flags_err; 353ac27a0ecSDave Kleikamp 35479906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 35579906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 35679906964STheodore Ts'o continue; 357f8011d93SJan Kara /* These flags get special treatment later */ 358f8011d93SJan Kara if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) 359f8011d93SJan Kara continue; 36079906964STheodore Ts'o if (mask & flags) 36179906964STheodore Ts'o ext4_set_inode_flag(inode, i); 36279906964STheodore Ts'o else 36379906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 36479906964STheodore Ts'o } 365ac27a0ecSDave Kleikamp 366617ba13bSMingming Cao ext4_set_inode_flags(inode); 367eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 368ac27a0ecSDave Kleikamp 369617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 370ac27a0ecSDave Kleikamp flags_err: 371617ba13bSMingming Cao ext4_journal_stop(handle); 37242a74f20SDave Hansen if (err) 37342a74f20SDave Hansen goto flags_out; 374ac27a0ecSDave Kleikamp 375e9072d85SRoss Zwisler if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 376e9072d85SRoss Zwisler /* 377e9072d85SRoss Zwisler * Changes to the journaling mode can cause unsafe changes to 378e9072d85SRoss Zwisler * S_DAX if we are using the DAX mount option. 379e9072d85SRoss Zwisler */ 380e9072d85SRoss Zwisler if (test_opt(inode->i_sb, DAX)) { 381e9072d85SRoss Zwisler err = -EBUSY; 382e9072d85SRoss Zwisler goto flags_out; 383e9072d85SRoss Zwisler } 384e9072d85SRoss Zwisler 385617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 3864db46fc2SAneesh Kumar K.V if (err) 3874db46fc2SAneesh Kumar K.V goto flags_out; 388e9072d85SRoss Zwisler } 389996bb9fdSTheodore Ts'o if (migrate) { 390996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 3914db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 392996bb9fdSTheodore Ts'o else 393996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 394996bb9fdSTheodore Ts'o } 395996bb9fdSTheodore Ts'o 39642a74f20SDave Hansen flags_out: 3979b7365fcSLi Xi return err; 3989b7365fcSLi Xi } 3999b7365fcSLi Xi 4009b7365fcSLi Xi #ifdef CONFIG_QUOTA 4019b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 4029b7365fcSLi Xi { 4039b7365fcSLi Xi struct inode *inode = file_inode(filp); 4049b7365fcSLi Xi struct super_block *sb = inode->i_sb; 4059b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 4069b7365fcSLi Xi int err, rc; 4079b7365fcSLi Xi handle_t *handle; 4089b7365fcSLi Xi kprojid_t kprojid; 4099b7365fcSLi Xi struct ext4_iloc iloc; 4109b7365fcSLi Xi struct ext4_inode *raw_inode; 411079788d0SWang Shilong struct dquot *transfer_to[MAXQUOTAS] = { }; 4129b7365fcSLi Xi 4130b7b7779SKaho Ng if (!ext4_has_feature_project(sb)) { 4149b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 4159b7365fcSLi Xi return -EOPNOTSUPP; 4169b7365fcSLi Xi else 4179b7365fcSLi Xi return 0; 4189b7365fcSLi Xi } 4199b7365fcSLi Xi 4209b7365fcSLi Xi if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 4219b7365fcSLi Xi return -EOPNOTSUPP; 4229b7365fcSLi Xi 4239b7365fcSLi Xi kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 4249b7365fcSLi Xi 4259b7365fcSLi Xi if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 4269b7365fcSLi Xi return 0; 4279b7365fcSLi Xi 4289b7365fcSLi Xi err = -EPERM; 4299b7365fcSLi Xi /* Is it quota file? Do not allow user to mess with it */ 43002749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 431dc7ac6c4SWang Shilong return err; 4329b7365fcSLi Xi 4339b7365fcSLi Xi err = ext4_get_inode_loc(inode, &iloc); 4349b7365fcSLi Xi if (err) 435dc7ac6c4SWang Shilong return err; 4369b7365fcSLi Xi 4379b7365fcSLi Xi raw_inode = ext4_raw_inode(&iloc); 4389b7365fcSLi Xi if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 439c03b45b8SMiao Xie err = ext4_expand_extra_isize(inode, 440c03b45b8SMiao Xie EXT4_SB(sb)->s_want_extra_isize, 441c03b45b8SMiao Xie &iloc); 442c03b45b8SMiao Xie if (err) 443dc7ac6c4SWang Shilong return err; 444c03b45b8SMiao Xie } else { 4459b7365fcSLi Xi brelse(iloc.bh); 446c03b45b8SMiao Xie } 4479b7365fcSLi Xi 448182a79e0SWang Shilong err = dquot_initialize(inode); 449182a79e0SWang Shilong if (err) 450182a79e0SWang Shilong return err; 4519b7365fcSLi Xi 4529b7365fcSLi Xi handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 4539b7365fcSLi Xi EXT4_QUOTA_INIT_BLOCKS(sb) + 4549b7365fcSLi Xi EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 455dc7ac6c4SWang Shilong if (IS_ERR(handle)) 456dc7ac6c4SWang Shilong return PTR_ERR(handle); 4579b7365fcSLi Xi 4589b7365fcSLi Xi err = ext4_reserve_inode_write(handle, inode, &iloc); 4599b7365fcSLi Xi if (err) 4609b7365fcSLi Xi goto out_stop; 4619b7365fcSLi Xi 4629b7365fcSLi Xi transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 463ff0bc084SSeth Forshee if (!IS_ERR(transfer_to[PRJQUOTA])) { 4647a9ca53aSTahsin Erdogan 4657a9ca53aSTahsin Erdogan /* __dquot_transfer() calls back ext4_get_inode_usage() which 4667a9ca53aSTahsin Erdogan * counts xattr inode references. 4677a9ca53aSTahsin Erdogan */ 4687a9ca53aSTahsin Erdogan down_read(&EXT4_I(inode)->xattr_sem); 4699b7365fcSLi Xi err = __dquot_transfer(inode, transfer_to); 4707a9ca53aSTahsin Erdogan up_read(&EXT4_I(inode)->xattr_sem); 4719b7365fcSLi Xi dqput(transfer_to[PRJQUOTA]); 4729b7365fcSLi Xi if (err) 4739b7365fcSLi Xi goto out_dirty; 4749b7365fcSLi Xi } 475079788d0SWang Shilong 4769b7365fcSLi Xi EXT4_I(inode)->i_projid = kprojid; 477eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 4789b7365fcSLi Xi out_dirty: 4799b7365fcSLi Xi rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 4809b7365fcSLi Xi if (!err) 4819b7365fcSLi Xi err = rc; 4829b7365fcSLi Xi out_stop: 4839b7365fcSLi Xi ext4_journal_stop(handle); 4849b7365fcSLi Xi return err; 4859b7365fcSLi Xi } 4869b7365fcSLi Xi #else 4879b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 4889b7365fcSLi Xi { 4899b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 4909b7365fcSLi Xi return -EOPNOTSUPP; 4919b7365fcSLi Xi return 0; 4929b7365fcSLi Xi } 4939b7365fcSLi Xi #endif 4949b7365fcSLi Xi 4959b7365fcSLi Xi /* Transfer internal flags to xflags */ 4969b7365fcSLi Xi static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) 4979b7365fcSLi Xi { 4989b7365fcSLi Xi __u32 xflags = 0; 4999b7365fcSLi Xi 5009b7365fcSLi Xi if (iflags & EXT4_SYNC_FL) 5019b7365fcSLi Xi xflags |= FS_XFLAG_SYNC; 5029b7365fcSLi Xi if (iflags & EXT4_IMMUTABLE_FL) 5039b7365fcSLi Xi xflags |= FS_XFLAG_IMMUTABLE; 5049b7365fcSLi Xi if (iflags & EXT4_APPEND_FL) 5059b7365fcSLi Xi xflags |= FS_XFLAG_APPEND; 5069b7365fcSLi Xi if (iflags & EXT4_NODUMP_FL) 5079b7365fcSLi Xi xflags |= FS_XFLAG_NODUMP; 5089b7365fcSLi Xi if (iflags & EXT4_NOATIME_FL) 5099b7365fcSLi Xi xflags |= FS_XFLAG_NOATIME; 5109b7365fcSLi Xi if (iflags & EXT4_PROJINHERIT_FL) 5119b7365fcSLi Xi xflags |= FS_XFLAG_PROJINHERIT; 5129b7365fcSLi Xi return xflags; 5139b7365fcSLi Xi } 5149b7365fcSLi Xi 515d14e7683SJan Kara #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ 516d14e7683SJan Kara FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ 517d14e7683SJan Kara FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) 518d14e7683SJan Kara 5199b7365fcSLi Xi /* Transfer xflags flags to internal */ 5209b7365fcSLi Xi static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) 5219b7365fcSLi Xi { 5229b7365fcSLi Xi unsigned long iflags = 0; 5239b7365fcSLi Xi 5249b7365fcSLi Xi if (xflags & FS_XFLAG_SYNC) 5259b7365fcSLi Xi iflags |= EXT4_SYNC_FL; 5269b7365fcSLi Xi if (xflags & FS_XFLAG_IMMUTABLE) 5279b7365fcSLi Xi iflags |= EXT4_IMMUTABLE_FL; 5289b7365fcSLi Xi if (xflags & FS_XFLAG_APPEND) 5299b7365fcSLi Xi iflags |= EXT4_APPEND_FL; 5309b7365fcSLi Xi if (xflags & FS_XFLAG_NODUMP) 5319b7365fcSLi Xi iflags |= EXT4_NODUMP_FL; 5329b7365fcSLi Xi if (xflags & FS_XFLAG_NOATIME) 5339b7365fcSLi Xi iflags |= EXT4_NOATIME_FL; 5349b7365fcSLi Xi if (xflags & FS_XFLAG_PROJINHERIT) 5359b7365fcSLi Xi iflags |= EXT4_PROJINHERIT_FL; 5369b7365fcSLi Xi 5379b7365fcSLi Xi return iflags; 5389b7365fcSLi Xi } 5399b7365fcSLi Xi 5401a20a630SEric Biggers static int ext4_shutdown(struct super_block *sb, unsigned long arg) 541783d9485STheodore Ts'o { 542783d9485STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 543783d9485STheodore Ts'o __u32 flags; 544783d9485STheodore Ts'o 545783d9485STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 546783d9485STheodore Ts'o return -EPERM; 547783d9485STheodore Ts'o 548783d9485STheodore Ts'o if (get_user(flags, (__u32 __user *)arg)) 549783d9485STheodore Ts'o return -EFAULT; 550783d9485STheodore Ts'o 551783d9485STheodore Ts'o if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) 552783d9485STheodore Ts'o return -EINVAL; 553783d9485STheodore Ts'o 554783d9485STheodore Ts'o if (ext4_forced_shutdown(sbi)) 555783d9485STheodore Ts'o return 0; 556783d9485STheodore Ts'o 557783d9485STheodore Ts'o ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); 558ccf0f32aSTheodore Ts'o trace_ext4_shutdown(sb, flags); 559783d9485STheodore Ts'o 560783d9485STheodore Ts'o switch (flags) { 561783d9485STheodore Ts'o case EXT4_GOING_FLAGS_DEFAULT: 562783d9485STheodore Ts'o freeze_bdev(sb->s_bdev); 563783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 564783d9485STheodore Ts'o thaw_bdev(sb->s_bdev, sb); 565783d9485STheodore Ts'o break; 566783d9485STheodore Ts'o case EXT4_GOING_FLAGS_LOGFLUSH: 567783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 568783d9485STheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { 569783d9485STheodore Ts'o (void) ext4_force_commit(sb); 570fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 571783d9485STheodore Ts'o } 572783d9485STheodore Ts'o break; 573783d9485STheodore Ts'o case EXT4_GOING_FLAGS_NOLOGFLUSH: 574783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 575a6d9946bSTheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) 576fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 577783d9485STheodore Ts'o break; 578783d9485STheodore Ts'o default: 579783d9485STheodore Ts'o return -EINVAL; 580783d9485STheodore Ts'o } 581783d9485STheodore Ts'o clear_opt(sb, DISCARD); 582783d9485STheodore Ts'o return 0; 583783d9485STheodore Ts'o } 584783d9485STheodore Ts'o 5850c9ec4beSDarrick J. Wong struct getfsmap_info { 5860c9ec4beSDarrick J. Wong struct super_block *gi_sb; 5870c9ec4beSDarrick J. Wong struct fsmap_head __user *gi_data; 5880c9ec4beSDarrick J. Wong unsigned int gi_idx; 5890c9ec4beSDarrick J. Wong __u32 gi_last_flags; 5900c9ec4beSDarrick J. Wong }; 5910c9ec4beSDarrick J. Wong 5920c9ec4beSDarrick J. Wong static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) 5930c9ec4beSDarrick J. Wong { 5940c9ec4beSDarrick J. Wong struct getfsmap_info *info = priv; 5950c9ec4beSDarrick J. Wong struct fsmap fm; 5960c9ec4beSDarrick J. Wong 5970c9ec4beSDarrick J. Wong trace_ext4_getfsmap_mapping(info->gi_sb, xfm); 5980c9ec4beSDarrick J. Wong 5990c9ec4beSDarrick J. Wong info->gi_last_flags = xfm->fmr_flags; 6000c9ec4beSDarrick J. Wong ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); 6010c9ec4beSDarrick J. Wong if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, 6020c9ec4beSDarrick J. Wong sizeof(struct fsmap))) 6030c9ec4beSDarrick J. Wong return -EFAULT; 6040c9ec4beSDarrick J. Wong 6050c9ec4beSDarrick J. Wong return 0; 6060c9ec4beSDarrick J. Wong } 6070c9ec4beSDarrick J. Wong 6080c9ec4beSDarrick J. Wong static int ext4_ioc_getfsmap(struct super_block *sb, 6090c9ec4beSDarrick J. Wong struct fsmap_head __user *arg) 6100c9ec4beSDarrick J. Wong { 6110ba33facSTheodore Ts'o struct getfsmap_info info = { NULL }; 6120c9ec4beSDarrick J. Wong struct ext4_fsmap_head xhead = {0}; 6130c9ec4beSDarrick J. Wong struct fsmap_head head; 6140c9ec4beSDarrick J. Wong bool aborted = false; 6150c9ec4beSDarrick J. Wong int error; 6160c9ec4beSDarrick J. Wong 6170c9ec4beSDarrick J. Wong if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 6180c9ec4beSDarrick J. Wong return -EFAULT; 6190c9ec4beSDarrick J. Wong if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 6200c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 6210c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[0].fmr_reserved)) || 6220c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 6230c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[1].fmr_reserved))) 6240c9ec4beSDarrick J. Wong return -EINVAL; 6250c9ec4beSDarrick J. Wong /* 6260c9ec4beSDarrick J. Wong * ext4 doesn't report file extents at all, so the only valid 6270c9ec4beSDarrick J. Wong * file offsets are the magic ones (all zeroes or all ones). 6280c9ec4beSDarrick J. Wong */ 6290c9ec4beSDarrick J. Wong if (head.fmh_keys[0].fmr_offset || 6300c9ec4beSDarrick J. Wong (head.fmh_keys[1].fmr_offset != 0 && 6310c9ec4beSDarrick J. Wong head.fmh_keys[1].fmr_offset != -1ULL)) 6320c9ec4beSDarrick J. Wong return -EINVAL; 6330c9ec4beSDarrick J. Wong 6340c9ec4beSDarrick J. Wong xhead.fmh_iflags = head.fmh_iflags; 6350c9ec4beSDarrick J. Wong xhead.fmh_count = head.fmh_count; 6360c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); 6370c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); 6380c9ec4beSDarrick J. Wong 6390c9ec4beSDarrick J. Wong trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); 6400c9ec4beSDarrick J. Wong trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); 6410c9ec4beSDarrick J. Wong 6420c9ec4beSDarrick J. Wong info.gi_sb = sb; 6430c9ec4beSDarrick J. Wong info.gi_data = arg; 6440c9ec4beSDarrick J. Wong error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); 6450c9ec4beSDarrick J. Wong if (error == EXT4_QUERY_RANGE_ABORT) { 6460c9ec4beSDarrick J. Wong error = 0; 6470c9ec4beSDarrick J. Wong aborted = true; 6480c9ec4beSDarrick J. Wong } else if (error) 6490c9ec4beSDarrick J. Wong return error; 6500c9ec4beSDarrick J. Wong 6510c9ec4beSDarrick J. Wong /* If we didn't abort, set the "last" flag in the last fmx */ 6520c9ec4beSDarrick J. Wong if (!aborted && info.gi_idx) { 6530c9ec4beSDarrick J. Wong info.gi_last_flags |= FMR_OF_LAST; 6540c9ec4beSDarrick J. Wong if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, 6550c9ec4beSDarrick J. Wong &info.gi_last_flags, 6560c9ec4beSDarrick J. Wong sizeof(info.gi_last_flags))) 6570c9ec4beSDarrick J. Wong return -EFAULT; 6580c9ec4beSDarrick J. Wong } 6590c9ec4beSDarrick J. Wong 6600c9ec4beSDarrick J. Wong /* copy back header */ 6610c9ec4beSDarrick J. Wong head.fmh_entries = xhead.fmh_entries; 6620c9ec4beSDarrick J. Wong head.fmh_oflags = xhead.fmh_oflags; 6630c9ec4beSDarrick J. Wong if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 6640c9ec4beSDarrick J. Wong return -EFAULT; 6650c9ec4beSDarrick J. Wong 6660c9ec4beSDarrick J. Wong return 0; 6670c9ec4beSDarrick J. Wong } 6680c9ec4beSDarrick J. Wong 669e145b35bSAl Viro static long ext4_ioctl_group_add(struct file *file, 670e145b35bSAl Viro struct ext4_new_group_data *input) 671e145b35bSAl Viro { 672e145b35bSAl Viro struct super_block *sb = file_inode(file)->i_sb; 673e145b35bSAl Viro int err, err2=0; 674e145b35bSAl Viro 675e145b35bSAl Viro err = ext4_resize_begin(sb); 676e145b35bSAl Viro if (err) 677e145b35bSAl Viro return err; 678e145b35bSAl Viro 679e145b35bSAl Viro if (ext4_has_feature_bigalloc(sb)) { 680e145b35bSAl Viro ext4_msg(sb, KERN_ERR, 681e145b35bSAl Viro "Online resizing not supported with bigalloc"); 682e145b35bSAl Viro err = -EOPNOTSUPP; 683e145b35bSAl Viro goto group_add_out; 684e145b35bSAl Viro } 685e145b35bSAl Viro 686e145b35bSAl Viro err = mnt_want_write_file(file); 687e145b35bSAl Viro if (err) 688e145b35bSAl Viro goto group_add_out; 689e145b35bSAl Viro 690e145b35bSAl Viro err = ext4_group_add(sb, input); 691e145b35bSAl Viro if (EXT4_SB(sb)->s_journal) { 692e145b35bSAl Viro jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 693e145b35bSAl Viro err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 694e145b35bSAl Viro jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 695e145b35bSAl Viro } 696e145b35bSAl Viro if (err == 0) 697e145b35bSAl Viro err = err2; 698e145b35bSAl Viro mnt_drop_write_file(file); 699e145b35bSAl Viro if (!err && ext4_has_group_desc_csum(sb) && 700e145b35bSAl Viro test_opt(sb, INIT_INODE_TABLE)) 701e145b35bSAl Viro err = ext4_register_li_request(sb, input->group); 702e145b35bSAl Viro group_add_out: 703e145b35bSAl Viro ext4_resize_end(sb); 704e145b35bSAl Viro return err; 705e145b35bSAl Viro } 706e145b35bSAl Viro 707dc7ac6c4SWang Shilong static int ext4_ioctl_check_project(struct inode *inode, struct fsxattr *fa) 708dc7ac6c4SWang Shilong { 709dc7ac6c4SWang Shilong /* 710dc7ac6c4SWang Shilong * Project Quota ID state is only allowed to change from within the init 711dc7ac6c4SWang Shilong * namespace. Enforce that restriction only if we are trying to change 712dc7ac6c4SWang Shilong * the quota ID state. Everything else is allowed in user namespaces. 713dc7ac6c4SWang Shilong */ 714dc7ac6c4SWang Shilong if (current_user_ns() == &init_user_ns) 715dc7ac6c4SWang Shilong return 0; 716dc7ac6c4SWang Shilong 717dc7ac6c4SWang Shilong if (__kprojid_val(EXT4_I(inode)->i_projid) != fa->fsx_projid) 718dc7ac6c4SWang Shilong return -EINVAL; 719dc7ac6c4SWang Shilong 720dc7ac6c4SWang Shilong if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT)) { 721dc7ac6c4SWang Shilong if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT)) 722dc7ac6c4SWang Shilong return -EINVAL; 723dc7ac6c4SWang Shilong } else { 724dc7ac6c4SWang Shilong if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT) 725dc7ac6c4SWang Shilong return -EINVAL; 726dc7ac6c4SWang Shilong } 727dc7ac6c4SWang Shilong 728dc7ac6c4SWang Shilong return 0; 729dc7ac6c4SWang Shilong } 730dc7ac6c4SWang Shilong 7319b7365fcSLi Xi long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 7329b7365fcSLi Xi { 7339b7365fcSLi Xi struct inode *inode = file_inode(filp); 7349b7365fcSLi Xi struct super_block *sb = inode->i_sb; 7359b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 7369b7365fcSLi Xi unsigned int flags; 7379b7365fcSLi Xi 7389b7365fcSLi Xi ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 7399b7365fcSLi Xi 7409b7365fcSLi Xi switch (cmd) { 7410c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 7420c9ec4beSDarrick J. Wong return ext4_ioc_getfsmap(sb, (void __user *)arg); 7439b7365fcSLi Xi case EXT4_IOC_GETFLAGS: 7449b7365fcSLi Xi flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 7459b7365fcSLi Xi return put_user(flags, (int __user *) arg); 7469b7365fcSLi Xi case EXT4_IOC_SETFLAGS: { 7479b7365fcSLi Xi int err; 7489b7365fcSLi Xi 7499b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 7509b7365fcSLi Xi return -EACCES; 7519b7365fcSLi Xi 7529b7365fcSLi Xi if (get_user(flags, (int __user *) arg)) 7539b7365fcSLi Xi return -EFAULT; 7549b7365fcSLi Xi 755d14e7683SJan Kara if (flags & ~EXT4_FL_USER_VISIBLE) 756d14e7683SJan Kara return -EOPNOTSUPP; 757d14e7683SJan Kara /* 758d14e7683SJan Kara * chattr(1) grabs flags via GETFLAGS, modifies the result and 759d14e7683SJan Kara * passes that to SETFLAGS. So we cannot easily make SETFLAGS 760d14e7683SJan Kara * more restrictive than just silently masking off visible but 761d14e7683SJan Kara * not settable flags as we always did. 762d14e7683SJan Kara */ 763d14e7683SJan Kara flags &= EXT4_FL_USER_MODIFIABLE; 764d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 765d14e7683SJan Kara return -EOPNOTSUPP; 766d14e7683SJan Kara 7679b7365fcSLi Xi err = mnt_want_write_file(filp); 7689b7365fcSLi Xi if (err) 7699b7365fcSLi Xi return err; 7709b7365fcSLi Xi 7715955102cSAl Viro inode_lock(inode); 7729b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 7735955102cSAl Viro inode_unlock(inode); 7742a79f17eSAl Viro mnt_drop_write_file(filp); 775ac27a0ecSDave Kleikamp return err; 776ac27a0ecSDave Kleikamp } 777617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 778617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 779ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 780617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 781617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 782ac27a0ecSDave Kleikamp handle_t *handle; 783617ba13bSMingming Cao struct ext4_iloc iloc; 784ac27a0ecSDave Kleikamp __u32 generation; 785ac27a0ecSDave Kleikamp int err; 786ac27a0ecSDave Kleikamp 7872e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 788ac27a0ecSDave Kleikamp return -EPERM; 78942a74f20SDave Hansen 7909aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 791814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 792814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 793814525f4SDarrick J. Wong return -ENOTTY; 794814525f4SDarrick J. Wong } 795814525f4SDarrick J. Wong 796a561be71SAl Viro err = mnt_want_write_file(filp); 79742a74f20SDave Hansen if (err) 79842a74f20SDave Hansen return err; 79942a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 80042a74f20SDave Hansen err = -EFAULT; 80142a74f20SDave Hansen goto setversion_out; 80242a74f20SDave Hansen } 803ac27a0ecSDave Kleikamp 8045955102cSAl Viro inode_lock(inode); 8059924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 80642a74f20SDave Hansen if (IS_ERR(handle)) { 80742a74f20SDave Hansen err = PTR_ERR(handle); 8086c2155b9SDjalal Harouni goto unlock_out; 80942a74f20SDave Hansen } 810617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 811ac27a0ecSDave Kleikamp if (err == 0) { 812eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 813ac27a0ecSDave Kleikamp inode->i_generation = generation; 814617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 815ac27a0ecSDave Kleikamp } 816617ba13bSMingming Cao ext4_journal_stop(handle); 8176c2155b9SDjalal Harouni 8186c2155b9SDjalal Harouni unlock_out: 8195955102cSAl Viro inode_unlock(inode); 82042a74f20SDave Hansen setversion_out: 8212a79f17eSAl Viro mnt_drop_write_file(filp); 822ac27a0ecSDave Kleikamp return err; 823ac27a0ecSDave Kleikamp } 824617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 825617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 826ac046f1dSPeng Tao int err, err2=0; 827ac27a0ecSDave Kleikamp 8288f82f840SYongqiang Yang err = ext4_resize_begin(sb); 8298f82f840SYongqiang Yang if (err) 8308f82f840SYongqiang Yang return err; 831ac27a0ecSDave Kleikamp 832014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 833014a1770SDjalal Harouni err = -EFAULT; 834014a1770SDjalal Harouni goto group_extend_out; 835014a1770SDjalal Harouni } 836ac27a0ecSDave Kleikamp 837e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 838bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 839bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 840014a1770SDjalal Harouni err = -EOPNOTSUPP; 841014a1770SDjalal Harouni goto group_extend_out; 842bab08ab9STheodore Ts'o } 843bab08ab9STheodore Ts'o 844a561be71SAl Viro err = mnt_want_write_file(filp); 84542a74f20SDave Hansen if (err) 846014a1770SDjalal Harouni goto group_extend_out; 84742a74f20SDave Hansen 848617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 849ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 850dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 8517ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 852dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 853ac046f1dSPeng Tao } 8547ffe1ea8SHidehiro Kawai if (err == 0) 8557ffe1ea8SHidehiro Kawai err = err2; 8562a79f17eSAl Viro mnt_drop_write_file(filp); 857014a1770SDjalal Harouni group_extend_out: 8588f82f840SYongqiang Yang ext4_resize_end(sb); 859ac27a0ecSDave Kleikamp return err; 860ac27a0ecSDave Kleikamp } 861748de673SAkira Fujita 862748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 863748de673SAkira Fujita struct move_extent me; 8642903ff01SAl Viro struct fd donor; 8652903ff01SAl Viro int err; 866748de673SAkira Fujita 8674a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 8684a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 8694a58579bSAkira Fujita return -EBADF; 8704a58579bSAkira Fujita 871748de673SAkira Fujita if (copy_from_user(&me, 872748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 873748de673SAkira Fujita return -EFAULT; 8744a58579bSAkira Fujita me.moved_len = 0; 875748de673SAkira Fujita 8762903ff01SAl Viro donor = fdget(me.donor_fd); 8772903ff01SAl Viro if (!donor.file) 878748de673SAkira Fujita return -EBADF; 879748de673SAkira Fujita 8802903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 8814a58579bSAkira Fujita err = -EBADF; 8824a58579bSAkira Fujita goto mext_out; 883748de673SAkira Fujita } 884748de673SAkira Fujita 885e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 886bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 887bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 888399c9b86SAl Viro err = -EOPNOTSUPP; 889399c9b86SAl Viro goto mext_out; 89073f34a5eSRoss Zwisler } else if (IS_DAX(inode)) { 89173f34a5eSRoss Zwisler ext4_msg(sb, KERN_ERR, 89273f34a5eSRoss Zwisler "Online defrag not supported with DAX"); 89373f34a5eSRoss Zwisler err = -EOPNOTSUPP; 89473f34a5eSRoss Zwisler goto mext_out; 895bab08ab9STheodore Ts'o } 896bab08ab9STheodore Ts'o 897a561be71SAl Viro err = mnt_want_write_file(filp); 8984a58579bSAkira Fujita if (err) 8994a58579bSAkira Fujita goto mext_out; 9004a58579bSAkira Fujita 9012903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 902748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 9032a79f17eSAl Viro mnt_drop_write_file(filp); 904748de673SAkira Fujita 905c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 906c437b273SAkira Fujita &me, sizeof(me))) 9074a58579bSAkira Fujita err = -EFAULT; 9084a58579bSAkira Fujita mext_out: 9092903ff01SAl Viro fdput(donor); 910748de673SAkira Fujita return err; 911748de673SAkira Fujita } 912748de673SAkira Fujita 913617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 914617ba13bSMingming Cao struct ext4_new_group_data input; 915ac27a0ecSDave Kleikamp 916617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 917e145b35bSAl Viro sizeof(input))) 918e145b35bSAl Viro return -EFAULT; 919ac27a0ecSDave Kleikamp 920e145b35bSAl Viro return ext4_ioctl_group_add(filp, &input); 921ac27a0ecSDave Kleikamp } 922ac27a0ecSDave Kleikamp 923c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 9242a43a878SAneesh Kumar K.V { 9252a43a878SAneesh Kumar K.V int err; 9262e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 9272a43a878SAneesh Kumar K.V return -EACCES; 9282a43a878SAneesh Kumar K.V 929a561be71SAl Viro err = mnt_want_write_file(filp); 9302a43a878SAneesh Kumar K.V if (err) 9312a43a878SAneesh Kumar K.V return err; 9322a43a878SAneesh Kumar K.V /* 9332a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 9342a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 9352a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 9362a43a878SAneesh Kumar K.V * inode format to prevent read. 9372a43a878SAneesh Kumar K.V */ 9385955102cSAl Viro inode_lock((inode)); 9392a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 9405955102cSAl Viro inode_unlock((inode)); 9412a79f17eSAl Viro mnt_drop_write_file(filp); 9422a43a878SAneesh Kumar K.V return err; 9432a43a878SAneesh Kumar K.V } 944c14c6fd5SAneesh Kumar K.V 945ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 946ccd2506bSTheodore Ts'o { 947ccd2506bSTheodore Ts'o int err; 9482e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 949ccd2506bSTheodore Ts'o return -EACCES; 950ccd2506bSTheodore Ts'o 951a561be71SAl Viro err = mnt_want_write_file(filp); 952ccd2506bSTheodore Ts'o if (err) 953ccd2506bSTheodore Ts'o return err; 954ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 9552a79f17eSAl Viro mnt_drop_write_file(filp); 956ccd2506bSTheodore Ts'o return err; 957ccd2506bSTheodore Ts'o } 958ccd2506bSTheodore Ts'o 959393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 9603e67cfadSDmitry Monakhov { 9613e67cfadSDmitry Monakhov int err; 962393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 963393d1d1dSDr. Tilmann Bubeck return -EBADF; 9643e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 9653e67cfadSDmitry Monakhov if (err) 9663e67cfadSDmitry Monakhov return err; 9673e67cfadSDmitry Monakhov err = swap_inode_boot_loader(sb, inode); 9683e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 9693e67cfadSDmitry Monakhov return err; 9703e67cfadSDmitry Monakhov } 971393d1d1dSDr. Tilmann Bubeck 97219c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 97319c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 97419c5246dSYongqiang Yang int err = 0, err2 = 0; 9757f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 97619c5246dSYongqiang Yang 97719c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 97819c5246dSYongqiang Yang sizeof(__u64))) { 97919c5246dSYongqiang Yang return -EFAULT; 98019c5246dSYongqiang Yang } 98119c5246dSYongqiang Yang 98219c5246dSYongqiang Yang err = ext4_resize_begin(sb); 98319c5246dSYongqiang Yang if (err) 98419c5246dSYongqiang Yang return err; 98519c5246dSYongqiang Yang 9868cae6f71SAl Viro err = mnt_want_write_file(filp); 98719c5246dSYongqiang Yang if (err) 98819c5246dSYongqiang Yang goto resizefs_out; 98919c5246dSYongqiang Yang 99019c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 99119c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 99219c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 99319c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 99419c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 99519c5246dSYongqiang Yang } 99619c5246dSYongqiang Yang if (err == 0) 99719c5246dSYongqiang Yang err = err2; 9988cae6f71SAl Viro mnt_drop_write_file(filp); 999310a997fSKirill Tkhai if (!err && (o_group < EXT4_SB(sb)->s_groups_count) && 10007f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 10017f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 10027f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 10037f511862STheodore Ts'o 100419c5246dSYongqiang Yang resizefs_out: 100519c5246dSYongqiang Yang ext4_resize_end(sb); 100619c5246dSYongqiang Yang return err; 100719c5246dSYongqiang Yang } 100819c5246dSYongqiang Yang 1009e681c047SLukas Czerner case FITRIM: 1010e681c047SLukas Czerner { 101141431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 1012e681c047SLukas Czerner struct fstrim_range range; 1013e681c047SLukas Czerner int ret = 0; 1014e681c047SLukas Czerner 1015e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 1016e681c047SLukas Czerner return -EPERM; 1017e681c047SLukas Czerner 101841431792SLukas Czerner if (!blk_queue_discard(q)) 101941431792SLukas Czerner return -EOPNOTSUPP; 102041431792SLukas Czerner 102118915b58SDarrick J. Wong /* 102218915b58SDarrick J. Wong * We haven't replayed the journal, so we cannot use our 102318915b58SDarrick J. Wong * block-bitmap-guided storage zapping commands. 102418915b58SDarrick J. Wong */ 102518915b58SDarrick J. Wong if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) 102618915b58SDarrick J. Wong return -EROFS; 102718915b58SDarrick J. Wong 1028e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 1029e681c047SLukas Czerner sizeof(range))) 1030e681c047SLukas Czerner return -EFAULT; 1031e681c047SLukas Czerner 10325c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 10335c2ed62fSLukas Czerner q->limits.discard_granularity); 1034e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 1035e681c047SLukas Czerner if (ret < 0) 1036e681c047SLukas Czerner return ret; 1037e681c047SLukas Czerner 1038e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 1039e681c047SLukas Czerner sizeof(range))) 1040e681c047SLukas Czerner return -EFAULT; 1041e681c047SLukas Czerner 1042e681c047SLukas Czerner return 0; 1043e681c047SLukas Czerner } 10447869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 10457869a4a6STheodore Ts'o return ext4_ext_precache(inode); 1046e681c047SLukas Czerner 1047db717d8eSEric Biggers case EXT4_IOC_SET_ENCRYPTION_POLICY: 10489a200d07SRichard Weinberger if (!ext4_has_feature_encrypt(sb)) 10499a200d07SRichard Weinberger return -EOPNOTSUPP; 1050db717d8eSEric Biggers return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); 10519a200d07SRichard Weinberger 10529bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: { 1053643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 10549bd8212fSMichael Halcrow int err, err2; 10559bd8212fSMichael Halcrow struct ext4_sb_info *sbi = EXT4_SB(sb); 10569bd8212fSMichael Halcrow handle_t *handle; 10579bd8212fSMichael Halcrow 105835997d1cSEric Biggers if (!ext4_has_feature_encrypt(sb)) 10599bd8212fSMichael Halcrow return -EOPNOTSUPP; 10609bd8212fSMichael Halcrow if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { 10619bd8212fSMichael Halcrow err = mnt_want_write_file(filp); 10629bd8212fSMichael Halcrow if (err) 10639bd8212fSMichael Halcrow return err; 10649bd8212fSMichael Halcrow handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 10659bd8212fSMichael Halcrow if (IS_ERR(handle)) { 10669bd8212fSMichael Halcrow err = PTR_ERR(handle); 10679bd8212fSMichael Halcrow goto pwsalt_err_exit; 10689bd8212fSMichael Halcrow } 10699bd8212fSMichael Halcrow err = ext4_journal_get_write_access(handle, sbi->s_sbh); 10709bd8212fSMichael Halcrow if (err) 10719bd8212fSMichael Halcrow goto pwsalt_err_journal; 10729bd8212fSMichael Halcrow generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); 10739bd8212fSMichael Halcrow err = ext4_handle_dirty_metadata(handle, NULL, 10749bd8212fSMichael Halcrow sbi->s_sbh); 10759bd8212fSMichael Halcrow pwsalt_err_journal: 10769bd8212fSMichael Halcrow err2 = ext4_journal_stop(handle); 10779bd8212fSMichael Halcrow if (err2 && !err) 10789bd8212fSMichael Halcrow err = err2; 10799bd8212fSMichael Halcrow pwsalt_err_exit: 10809bd8212fSMichael Halcrow mnt_drop_write_file(filp); 10819bd8212fSMichael Halcrow if (err) 10829bd8212fSMichael Halcrow return err; 10839bd8212fSMichael Halcrow } 1084b4ab9e29SFabian Frederick if (copy_to_user((void __user *) arg, 1085b4ab9e29SFabian Frederick sbi->s_es->s_encrypt_pw_salt, 16)) 10869bd8212fSMichael Halcrow return -EFAULT; 10879bd8212fSMichael Halcrow return 0; 1088ba679017SEric Biggers #else 1089ba679017SEric Biggers return -EOPNOTSUPP; 1090ba679017SEric Biggers #endif 10919bd8212fSMichael Halcrow } 1092db717d8eSEric Biggers case EXT4_IOC_GET_ENCRYPTION_POLICY: 1093db717d8eSEric Biggers return fscrypt_ioctl_get_policy(filp, (void __user *)arg); 10949bd8212fSMichael Halcrow 10959b7365fcSLi Xi case EXT4_IOC_FSGETXATTR: 10969b7365fcSLi Xi { 10979b7365fcSLi Xi struct fsxattr fa; 10989b7365fcSLi Xi 10999b7365fcSLi Xi memset(&fa, 0, sizeof(struct fsxattr)); 11009b7365fcSLi Xi fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); 11019b7365fcSLi Xi 11020b7b7779SKaho Ng if (ext4_has_feature_project(inode->i_sb)) { 11039b7365fcSLi Xi fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, 11049b7365fcSLi Xi EXT4_I(inode)->i_projid); 11059b7365fcSLi Xi } 11069b7365fcSLi Xi 11079b7365fcSLi Xi if (copy_to_user((struct fsxattr __user *)arg, 11089b7365fcSLi Xi &fa, sizeof(fa))) 11099b7365fcSLi Xi return -EFAULT; 11109b7365fcSLi Xi return 0; 11119b7365fcSLi Xi } 11129b7365fcSLi Xi case EXT4_IOC_FSSETXATTR: 11139b7365fcSLi Xi { 11149b7365fcSLi Xi struct fsxattr fa; 11159b7365fcSLi Xi int err; 11169b7365fcSLi Xi 11179b7365fcSLi Xi if (copy_from_user(&fa, (struct fsxattr __user *)arg, 11189b7365fcSLi Xi sizeof(fa))) 11199b7365fcSLi Xi return -EFAULT; 11209b7365fcSLi Xi 11219b7365fcSLi Xi /* Make sure caller has proper permission */ 11229b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 11239b7365fcSLi Xi return -EACCES; 11249b7365fcSLi Xi 1125d14e7683SJan Kara if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) 1126d14e7683SJan Kara return -EOPNOTSUPP; 1127d14e7683SJan Kara 1128d14e7683SJan Kara flags = ext4_xflags_to_iflags(fa.fsx_xflags); 1129d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 1130d14e7683SJan Kara return -EOPNOTSUPP; 1131d14e7683SJan Kara 11329b7365fcSLi Xi err = mnt_want_write_file(filp); 11339b7365fcSLi Xi if (err) 11349b7365fcSLi Xi return err; 11359b7365fcSLi Xi 11365955102cSAl Viro inode_lock(inode); 1137dc7ac6c4SWang Shilong err = ext4_ioctl_check_project(inode, &fa); 1138dc7ac6c4SWang Shilong if (err) 1139dc7ac6c4SWang Shilong goto out; 11409b7365fcSLi Xi flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | 11419b7365fcSLi Xi (flags & EXT4_FL_XFLAG_VISIBLE); 11429b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 1143dc7ac6c4SWang Shilong if (err) 1144dc7ac6c4SWang Shilong goto out; 1145dc7ac6c4SWang Shilong err = ext4_ioctl_setproject(filp, fa.fsx_projid); 1146dc7ac6c4SWang Shilong out: 11475955102cSAl Viro inode_unlock(inode); 11489b7365fcSLi Xi mnt_drop_write_file(filp); 11499b7365fcSLi Xi return err; 11509b7365fcSLi Xi } 1151e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 1152e9be2ac7STheodore Ts'o return ext4_shutdown(sb, arg); 1153ac27a0ecSDave Kleikamp default: 1154ac27a0ecSDave Kleikamp return -ENOTTY; 1155ac27a0ecSDave Kleikamp } 1156ac27a0ecSDave Kleikamp } 1157ac27a0ecSDave Kleikamp 1158ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 1159617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1160ac27a0ecSDave Kleikamp { 1161ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 1162ac27a0ecSDave Kleikamp switch (cmd) { 1163617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 1164617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 1165ac27a0ecSDave Kleikamp break; 1166617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 1167617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 1168ac27a0ecSDave Kleikamp break; 1169617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 1170617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 1171ac27a0ecSDave Kleikamp break; 1172617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 1173617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 1174ac27a0ecSDave Kleikamp break; 1175617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 1176617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 1177ac27a0ecSDave Kleikamp break; 1178617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 1179617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 1180ac27a0ecSDave Kleikamp break; 1181617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 1182617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 1183ac27a0ecSDave Kleikamp break; 1184617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 1185617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 1186ac27a0ecSDave Kleikamp break; 1187617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 1188617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 1189ac27a0ecSDave Kleikamp break; 11904d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 11914d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 1192e145b35bSAl Viro struct ext4_new_group_data input; 11934d92dc0fSBen Hutchings int err; 11944d92dc0fSBen Hutchings 11954d92dc0fSBen Hutchings uinput = compat_ptr(arg); 11964d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 11974d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 11984d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 11994d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 12004d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 12014d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 12024d92dc0fSBen Hutchings &uinput->reserved_blocks); 12034d92dc0fSBen Hutchings if (err) 12044d92dc0fSBen Hutchings return -EFAULT; 1205e145b35bSAl Viro return ext4_ioctl_group_add(file, &input); 12064d92dc0fSBen Hutchings } 1207b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 120819c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 12097869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 12109bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: 12119bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: 12129bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: 1213e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 12140c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 1215b684b2eeSChristian Borntraeger break; 1216ac27a0ecSDave Kleikamp default: 1217ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 1218ac27a0ecSDave Kleikamp } 12195cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 1220ac27a0ecSDave Kleikamp } 1221ac27a0ecSDave Kleikamp #endif 1222