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 2722e538403SDarrick J. Wong /* 2732e538403SDarrick J. Wong * If immutable is set and we are not clearing it, we're not allowed to change 2742e538403SDarrick J. Wong * anything else in the inode. Don't error out if we're only trying to set 2752e538403SDarrick J. Wong * immutable on an immutable file. 2762e538403SDarrick J. Wong */ 2772e538403SDarrick J. Wong static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid, 2782e538403SDarrick J. Wong unsigned int flags) 2792e538403SDarrick J. Wong { 2802e538403SDarrick J. Wong struct ext4_inode_info *ei = EXT4_I(inode); 2812e538403SDarrick J. Wong unsigned int oldflags = ei->i_flags; 2822e538403SDarrick J. Wong 2832e538403SDarrick J. Wong if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL)) 2842e538403SDarrick J. Wong return 0; 2852e538403SDarrick J. Wong 2862e538403SDarrick J. Wong if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL)) 2872e538403SDarrick J. Wong return -EPERM; 2882e538403SDarrick J. Wong if (ext4_has_feature_project(inode->i_sb) && 2892e538403SDarrick J. Wong __kprojid_val(ei->i_projid) != new_projid) 2902e538403SDarrick J. Wong return -EPERM; 2912e538403SDarrick J. Wong 2922e538403SDarrick J. Wong return 0; 2932e538403SDarrick J. Wong } 2942e538403SDarrick J. Wong 2959b7365fcSLi Xi static int ext4_ioctl_setflags(struct inode *inode, 2969b7365fcSLi Xi unsigned int flags) 297ac27a0ecSDave Kleikamp { 298617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 299ac27a0ecSDave Kleikamp handle_t *handle = NULL; 300fdde368eSAnton Protopopov int err = -EPERM, migrate = 0; 301617ba13bSMingming Cao struct ext4_iloc iloc; 30279906964STheodore Ts'o unsigned int oldflags, mask, i; 303ac27a0ecSDave Kleikamp unsigned int jflag; 304b886ee3eSGabriel Krisman Bertazi struct super_block *sb = inode->i_sb; 305ac27a0ecSDave Kleikamp 306e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 30702749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 30842a74f20SDave Hansen goto flags_out; 30942a74f20SDave Hansen 310ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 311ac27a0ecSDave Kleikamp 312ac27a0ecSDave Kleikamp /* The JOURNAL_DATA flag is modifiable only by root */ 313617ba13bSMingming Cao jflag = flags & EXT4_JOURNAL_DATA_FL; 314ac27a0ecSDave Kleikamp 3155aca2842SDarrick J. Wong err = vfs_ioc_setflags_prepare(inode, oldflags, flags); 3165aca2842SDarrick J. Wong if (err) 31742a74f20SDave Hansen goto flags_out; 318ac27a0ecSDave Kleikamp 319ac27a0ecSDave Kleikamp /* 320ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 321ac27a0ecSDave Kleikamp * the relevant capability. 322ac27a0ecSDave Kleikamp */ 323617ba13bSMingming Cao if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 32442a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 32542a74f20SDave Hansen goto flags_out; 326ac27a0ecSDave Kleikamp } 327996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 3284db46fc2SAneesh Kumar K.V migrate = 1; 329ac27a0ecSDave Kleikamp 330c8d46e41SJiaying Zhang if (flags & EXT4_EOFBLOCKS_FL) { 331c8d46e41SJiaying Zhang /* we don't support adding EOFBLOCKS flag */ 332c8d46e41SJiaying Zhang if (!(oldflags & EXT4_EOFBLOCKS_FL)) { 333c8d46e41SJiaying Zhang err = -EOPNOTSUPP; 334c8d46e41SJiaying Zhang goto flags_out; 335c8d46e41SJiaying Zhang } 3362c98eb5eSTheodore Ts'o } else if (oldflags & EXT4_EOFBLOCKS_FL) { 3372c98eb5eSTheodore Ts'o err = ext4_truncate(inode); 3382c98eb5eSTheodore Ts'o if (err) 3392c98eb5eSTheodore Ts'o goto flags_out; 3402c98eb5eSTheodore Ts'o } 341c8d46e41SJiaying Zhang 342b886ee3eSGabriel Krisman Bertazi if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) { 343b886ee3eSGabriel Krisman Bertazi if (!ext4_has_feature_casefold(sb)) { 344b886ee3eSGabriel Krisman Bertazi err = -EOPNOTSUPP; 345b886ee3eSGabriel Krisman Bertazi goto flags_out; 346b886ee3eSGabriel Krisman Bertazi } 347b886ee3eSGabriel Krisman Bertazi 348b886ee3eSGabriel Krisman Bertazi if (!S_ISDIR(inode->i_mode)) { 349b886ee3eSGabriel Krisman Bertazi err = -ENOTDIR; 350b886ee3eSGabriel Krisman Bertazi goto flags_out; 351b886ee3eSGabriel Krisman Bertazi } 352b886ee3eSGabriel Krisman Bertazi 353b886ee3eSGabriel Krisman Bertazi if (!ext4_empty_dir(inode)) { 354b886ee3eSGabriel Krisman Bertazi err = -ENOTEMPTY; 355b886ee3eSGabriel Krisman Bertazi goto flags_out; 356b886ee3eSGabriel Krisman Bertazi } 357b886ee3eSGabriel Krisman Bertazi } 358b886ee3eSGabriel Krisman Bertazi 3592e538403SDarrick J. Wong /* 3602e538403SDarrick J. Wong * Wait for all pending directio and then flush all the dirty pages 3612e538403SDarrick J. Wong * for this file. The flush marks all the pages readonly, so any 3622e538403SDarrick J. Wong * subsequent attempt to write to the file (particularly mmap pages) 3632e538403SDarrick J. Wong * will come through the filesystem and fail. 3642e538403SDarrick J. Wong */ 3652e538403SDarrick J. Wong if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) && 3662e538403SDarrick J. Wong (flags & EXT4_IMMUTABLE_FL)) { 3672e538403SDarrick J. Wong inode_dio_wait(inode); 3682e538403SDarrick J. Wong err = filemap_write_and_wait(inode->i_mapping); 3692e538403SDarrick J. Wong if (err) 3702e538403SDarrick J. Wong goto flags_out; 3712e538403SDarrick J. Wong } 3722e538403SDarrick J. Wong 3739924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 374ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 37542a74f20SDave Hansen err = PTR_ERR(handle); 37642a74f20SDave Hansen goto flags_out; 377ac27a0ecSDave Kleikamp } 378ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 3790390131bSFrank Mayhar ext4_handle_sync(handle); 380617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 381ac27a0ecSDave Kleikamp if (err) 382ac27a0ecSDave Kleikamp goto flags_err; 383ac27a0ecSDave Kleikamp 38479906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 38579906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 38679906964STheodore Ts'o continue; 387f8011d93SJan Kara /* These flags get special treatment later */ 388f8011d93SJan Kara if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) 389f8011d93SJan Kara continue; 39079906964STheodore Ts'o if (mask & flags) 39179906964STheodore Ts'o ext4_set_inode_flag(inode, i); 39279906964STheodore Ts'o else 39379906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 39479906964STheodore Ts'o } 395ac27a0ecSDave Kleikamp 396617ba13bSMingming Cao ext4_set_inode_flags(inode); 397eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 398ac27a0ecSDave Kleikamp 399617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 400ac27a0ecSDave Kleikamp flags_err: 401617ba13bSMingming Cao ext4_journal_stop(handle); 40242a74f20SDave Hansen if (err) 40342a74f20SDave Hansen goto flags_out; 404ac27a0ecSDave Kleikamp 405e9072d85SRoss Zwisler if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 406e9072d85SRoss Zwisler /* 407e9072d85SRoss Zwisler * Changes to the journaling mode can cause unsafe changes to 408e9072d85SRoss Zwisler * S_DAX if we are using the DAX mount option. 409e9072d85SRoss Zwisler */ 410e9072d85SRoss Zwisler if (test_opt(inode->i_sb, DAX)) { 411e9072d85SRoss Zwisler err = -EBUSY; 412e9072d85SRoss Zwisler goto flags_out; 413e9072d85SRoss Zwisler } 414e9072d85SRoss Zwisler 415617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 4164db46fc2SAneesh Kumar K.V if (err) 4174db46fc2SAneesh Kumar K.V goto flags_out; 418e9072d85SRoss Zwisler } 419996bb9fdSTheodore Ts'o if (migrate) { 420996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 4214db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 422996bb9fdSTheodore Ts'o else 423996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 424996bb9fdSTheodore Ts'o } 425996bb9fdSTheodore Ts'o 42642a74f20SDave Hansen flags_out: 4279b7365fcSLi Xi return err; 4289b7365fcSLi Xi } 4299b7365fcSLi Xi 4309b7365fcSLi Xi #ifdef CONFIG_QUOTA 4319b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 4329b7365fcSLi Xi { 4339b7365fcSLi Xi struct inode *inode = file_inode(filp); 4349b7365fcSLi Xi struct super_block *sb = inode->i_sb; 4359b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 4369b7365fcSLi Xi int err, rc; 4379b7365fcSLi Xi handle_t *handle; 4389b7365fcSLi Xi kprojid_t kprojid; 4399b7365fcSLi Xi struct ext4_iloc iloc; 4409b7365fcSLi Xi struct ext4_inode *raw_inode; 441079788d0SWang Shilong struct dquot *transfer_to[MAXQUOTAS] = { }; 4429b7365fcSLi Xi 4430b7b7779SKaho Ng if (!ext4_has_feature_project(sb)) { 4449b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 4459b7365fcSLi Xi return -EOPNOTSUPP; 4469b7365fcSLi Xi else 4479b7365fcSLi Xi return 0; 4489b7365fcSLi Xi } 4499b7365fcSLi Xi 4509b7365fcSLi Xi if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 4519b7365fcSLi Xi return -EOPNOTSUPP; 4529b7365fcSLi Xi 4539b7365fcSLi Xi kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 4549b7365fcSLi Xi 4559b7365fcSLi Xi if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 4569b7365fcSLi Xi return 0; 4579b7365fcSLi Xi 4589b7365fcSLi Xi err = -EPERM; 4599b7365fcSLi Xi /* Is it quota file? Do not allow user to mess with it */ 46002749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 461dc7ac6c4SWang Shilong return err; 4629b7365fcSLi Xi 4639b7365fcSLi Xi err = ext4_get_inode_loc(inode, &iloc); 4649b7365fcSLi Xi if (err) 465dc7ac6c4SWang Shilong return err; 4669b7365fcSLi Xi 4679b7365fcSLi Xi raw_inode = ext4_raw_inode(&iloc); 4689b7365fcSLi Xi if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 469c03b45b8SMiao Xie err = ext4_expand_extra_isize(inode, 470c03b45b8SMiao Xie EXT4_SB(sb)->s_want_extra_isize, 471c03b45b8SMiao Xie &iloc); 472c03b45b8SMiao Xie if (err) 473dc7ac6c4SWang Shilong return err; 474c03b45b8SMiao Xie } else { 4759b7365fcSLi Xi brelse(iloc.bh); 476c03b45b8SMiao Xie } 4779b7365fcSLi Xi 478182a79e0SWang Shilong err = dquot_initialize(inode); 479182a79e0SWang Shilong if (err) 480182a79e0SWang Shilong return err; 4819b7365fcSLi Xi 4829b7365fcSLi Xi handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 4839b7365fcSLi Xi EXT4_QUOTA_INIT_BLOCKS(sb) + 4849b7365fcSLi Xi EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 485dc7ac6c4SWang Shilong if (IS_ERR(handle)) 486dc7ac6c4SWang Shilong return PTR_ERR(handle); 4879b7365fcSLi Xi 4889b7365fcSLi Xi err = ext4_reserve_inode_write(handle, inode, &iloc); 4899b7365fcSLi Xi if (err) 4909b7365fcSLi Xi goto out_stop; 4919b7365fcSLi Xi 4929b7365fcSLi Xi transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 493ff0bc084SSeth Forshee if (!IS_ERR(transfer_to[PRJQUOTA])) { 4947a9ca53aSTahsin Erdogan 4957a9ca53aSTahsin Erdogan /* __dquot_transfer() calls back ext4_get_inode_usage() which 4967a9ca53aSTahsin Erdogan * counts xattr inode references. 4977a9ca53aSTahsin Erdogan */ 4987a9ca53aSTahsin Erdogan down_read(&EXT4_I(inode)->xattr_sem); 4999b7365fcSLi Xi err = __dquot_transfer(inode, transfer_to); 5007a9ca53aSTahsin Erdogan up_read(&EXT4_I(inode)->xattr_sem); 5019b7365fcSLi Xi dqput(transfer_to[PRJQUOTA]); 5029b7365fcSLi Xi if (err) 5039b7365fcSLi Xi goto out_dirty; 5049b7365fcSLi Xi } 505079788d0SWang Shilong 5069b7365fcSLi Xi EXT4_I(inode)->i_projid = kprojid; 507eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 5089b7365fcSLi Xi out_dirty: 5099b7365fcSLi Xi rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 5109b7365fcSLi Xi if (!err) 5119b7365fcSLi Xi err = rc; 5129b7365fcSLi Xi out_stop: 5139b7365fcSLi Xi ext4_journal_stop(handle); 5149b7365fcSLi Xi return err; 5159b7365fcSLi Xi } 5169b7365fcSLi Xi #else 5179b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 5189b7365fcSLi Xi { 5199b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 5209b7365fcSLi Xi return -EOPNOTSUPP; 5219b7365fcSLi Xi return 0; 5229b7365fcSLi Xi } 5239b7365fcSLi Xi #endif 5249b7365fcSLi Xi 5259b7365fcSLi Xi /* Transfer internal flags to xflags */ 5269b7365fcSLi Xi static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) 5279b7365fcSLi Xi { 5289b7365fcSLi Xi __u32 xflags = 0; 5299b7365fcSLi Xi 5309b7365fcSLi Xi if (iflags & EXT4_SYNC_FL) 5319b7365fcSLi Xi xflags |= FS_XFLAG_SYNC; 5329b7365fcSLi Xi if (iflags & EXT4_IMMUTABLE_FL) 5339b7365fcSLi Xi xflags |= FS_XFLAG_IMMUTABLE; 5349b7365fcSLi Xi if (iflags & EXT4_APPEND_FL) 5359b7365fcSLi Xi xflags |= FS_XFLAG_APPEND; 5369b7365fcSLi Xi if (iflags & EXT4_NODUMP_FL) 5379b7365fcSLi Xi xflags |= FS_XFLAG_NODUMP; 5389b7365fcSLi Xi if (iflags & EXT4_NOATIME_FL) 5399b7365fcSLi Xi xflags |= FS_XFLAG_NOATIME; 5409b7365fcSLi Xi if (iflags & EXT4_PROJINHERIT_FL) 5419b7365fcSLi Xi xflags |= FS_XFLAG_PROJINHERIT; 5429b7365fcSLi Xi return xflags; 5439b7365fcSLi Xi } 5449b7365fcSLi Xi 545d14e7683SJan Kara #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ 546d14e7683SJan Kara FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ 547d14e7683SJan Kara FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) 548d14e7683SJan Kara 5499b7365fcSLi Xi /* Transfer xflags flags to internal */ 5509b7365fcSLi Xi static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) 5519b7365fcSLi Xi { 5529b7365fcSLi Xi unsigned long iflags = 0; 5539b7365fcSLi Xi 5549b7365fcSLi Xi if (xflags & FS_XFLAG_SYNC) 5559b7365fcSLi Xi iflags |= EXT4_SYNC_FL; 5569b7365fcSLi Xi if (xflags & FS_XFLAG_IMMUTABLE) 5579b7365fcSLi Xi iflags |= EXT4_IMMUTABLE_FL; 5589b7365fcSLi Xi if (xflags & FS_XFLAG_APPEND) 5599b7365fcSLi Xi iflags |= EXT4_APPEND_FL; 5609b7365fcSLi Xi if (xflags & FS_XFLAG_NODUMP) 5619b7365fcSLi Xi iflags |= EXT4_NODUMP_FL; 5629b7365fcSLi Xi if (xflags & FS_XFLAG_NOATIME) 5639b7365fcSLi Xi iflags |= EXT4_NOATIME_FL; 5649b7365fcSLi Xi if (xflags & FS_XFLAG_PROJINHERIT) 5659b7365fcSLi Xi iflags |= EXT4_PROJINHERIT_FL; 5669b7365fcSLi Xi 5679b7365fcSLi Xi return iflags; 5689b7365fcSLi Xi } 5699b7365fcSLi Xi 5701a20a630SEric Biggers static int ext4_shutdown(struct super_block *sb, unsigned long arg) 571783d9485STheodore Ts'o { 572783d9485STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 573783d9485STheodore Ts'o __u32 flags; 574783d9485STheodore Ts'o 575783d9485STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 576783d9485STheodore Ts'o return -EPERM; 577783d9485STheodore Ts'o 578783d9485STheodore Ts'o if (get_user(flags, (__u32 __user *)arg)) 579783d9485STheodore Ts'o return -EFAULT; 580783d9485STheodore Ts'o 581783d9485STheodore Ts'o if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) 582783d9485STheodore Ts'o return -EINVAL; 583783d9485STheodore Ts'o 584783d9485STheodore Ts'o if (ext4_forced_shutdown(sbi)) 585783d9485STheodore Ts'o return 0; 586783d9485STheodore Ts'o 587783d9485STheodore Ts'o ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); 588ccf0f32aSTheodore Ts'o trace_ext4_shutdown(sb, flags); 589783d9485STheodore Ts'o 590783d9485STheodore Ts'o switch (flags) { 591783d9485STheodore Ts'o case EXT4_GOING_FLAGS_DEFAULT: 592783d9485STheodore Ts'o freeze_bdev(sb->s_bdev); 593783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 594783d9485STheodore Ts'o thaw_bdev(sb->s_bdev, sb); 595783d9485STheodore Ts'o break; 596783d9485STheodore Ts'o case EXT4_GOING_FLAGS_LOGFLUSH: 597783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 598783d9485STheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { 599783d9485STheodore Ts'o (void) ext4_force_commit(sb); 600fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 601783d9485STheodore Ts'o } 602783d9485STheodore Ts'o break; 603783d9485STheodore Ts'o case EXT4_GOING_FLAGS_NOLOGFLUSH: 604783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 605a6d9946bSTheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) 606fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 607783d9485STheodore Ts'o break; 608783d9485STheodore Ts'o default: 609783d9485STheodore Ts'o return -EINVAL; 610783d9485STheodore Ts'o } 611783d9485STheodore Ts'o clear_opt(sb, DISCARD); 612783d9485STheodore Ts'o return 0; 613783d9485STheodore Ts'o } 614783d9485STheodore Ts'o 6150c9ec4beSDarrick J. Wong struct getfsmap_info { 6160c9ec4beSDarrick J. Wong struct super_block *gi_sb; 6170c9ec4beSDarrick J. Wong struct fsmap_head __user *gi_data; 6180c9ec4beSDarrick J. Wong unsigned int gi_idx; 6190c9ec4beSDarrick J. Wong __u32 gi_last_flags; 6200c9ec4beSDarrick J. Wong }; 6210c9ec4beSDarrick J. Wong 6220c9ec4beSDarrick J. Wong static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) 6230c9ec4beSDarrick J. Wong { 6240c9ec4beSDarrick J. Wong struct getfsmap_info *info = priv; 6250c9ec4beSDarrick J. Wong struct fsmap fm; 6260c9ec4beSDarrick J. Wong 6270c9ec4beSDarrick J. Wong trace_ext4_getfsmap_mapping(info->gi_sb, xfm); 6280c9ec4beSDarrick J. Wong 6290c9ec4beSDarrick J. Wong info->gi_last_flags = xfm->fmr_flags; 6300c9ec4beSDarrick J. Wong ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); 6310c9ec4beSDarrick J. Wong if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, 6320c9ec4beSDarrick J. Wong sizeof(struct fsmap))) 6330c9ec4beSDarrick J. Wong return -EFAULT; 6340c9ec4beSDarrick J. Wong 6350c9ec4beSDarrick J. Wong return 0; 6360c9ec4beSDarrick J. Wong } 6370c9ec4beSDarrick J. Wong 6380c9ec4beSDarrick J. Wong static int ext4_ioc_getfsmap(struct super_block *sb, 6390c9ec4beSDarrick J. Wong struct fsmap_head __user *arg) 6400c9ec4beSDarrick J. Wong { 6410ba33facSTheodore Ts'o struct getfsmap_info info = { NULL }; 6420c9ec4beSDarrick J. Wong struct ext4_fsmap_head xhead = {0}; 6430c9ec4beSDarrick J. Wong struct fsmap_head head; 6440c9ec4beSDarrick J. Wong bool aborted = false; 6450c9ec4beSDarrick J. Wong int error; 6460c9ec4beSDarrick J. Wong 6470c9ec4beSDarrick J. Wong if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 6480c9ec4beSDarrick J. Wong return -EFAULT; 6490c9ec4beSDarrick J. Wong if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 6500c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 6510c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[0].fmr_reserved)) || 6520c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 6530c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[1].fmr_reserved))) 6540c9ec4beSDarrick J. Wong return -EINVAL; 6550c9ec4beSDarrick J. Wong /* 6560c9ec4beSDarrick J. Wong * ext4 doesn't report file extents at all, so the only valid 6570c9ec4beSDarrick J. Wong * file offsets are the magic ones (all zeroes or all ones). 6580c9ec4beSDarrick J. Wong */ 6590c9ec4beSDarrick J. Wong if (head.fmh_keys[0].fmr_offset || 6600c9ec4beSDarrick J. Wong (head.fmh_keys[1].fmr_offset != 0 && 6610c9ec4beSDarrick J. Wong head.fmh_keys[1].fmr_offset != -1ULL)) 6620c9ec4beSDarrick J. Wong return -EINVAL; 6630c9ec4beSDarrick J. Wong 6640c9ec4beSDarrick J. Wong xhead.fmh_iflags = head.fmh_iflags; 6650c9ec4beSDarrick J. Wong xhead.fmh_count = head.fmh_count; 6660c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); 6670c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); 6680c9ec4beSDarrick J. Wong 6690c9ec4beSDarrick J. Wong trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); 6700c9ec4beSDarrick J. Wong trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); 6710c9ec4beSDarrick J. Wong 6720c9ec4beSDarrick J. Wong info.gi_sb = sb; 6730c9ec4beSDarrick J. Wong info.gi_data = arg; 6740c9ec4beSDarrick J. Wong error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); 6750c9ec4beSDarrick J. Wong if (error == EXT4_QUERY_RANGE_ABORT) { 6760c9ec4beSDarrick J. Wong error = 0; 6770c9ec4beSDarrick J. Wong aborted = true; 6780c9ec4beSDarrick J. Wong } else if (error) 6790c9ec4beSDarrick J. Wong return error; 6800c9ec4beSDarrick J. Wong 6810c9ec4beSDarrick J. Wong /* If we didn't abort, set the "last" flag in the last fmx */ 6820c9ec4beSDarrick J. Wong if (!aborted && info.gi_idx) { 6830c9ec4beSDarrick J. Wong info.gi_last_flags |= FMR_OF_LAST; 6840c9ec4beSDarrick J. Wong if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, 6850c9ec4beSDarrick J. Wong &info.gi_last_flags, 6860c9ec4beSDarrick J. Wong sizeof(info.gi_last_flags))) 6870c9ec4beSDarrick J. Wong return -EFAULT; 6880c9ec4beSDarrick J. Wong } 6890c9ec4beSDarrick J. Wong 6900c9ec4beSDarrick J. Wong /* copy back header */ 6910c9ec4beSDarrick J. Wong head.fmh_entries = xhead.fmh_entries; 6920c9ec4beSDarrick J. Wong head.fmh_oflags = xhead.fmh_oflags; 6930c9ec4beSDarrick J. Wong if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 6940c9ec4beSDarrick J. Wong return -EFAULT; 6950c9ec4beSDarrick J. Wong 6960c9ec4beSDarrick J. Wong return 0; 6970c9ec4beSDarrick J. Wong } 6980c9ec4beSDarrick J. Wong 699e145b35bSAl Viro static long ext4_ioctl_group_add(struct file *file, 700e145b35bSAl Viro struct ext4_new_group_data *input) 701e145b35bSAl Viro { 702e145b35bSAl Viro struct super_block *sb = file_inode(file)->i_sb; 703e145b35bSAl Viro int err, err2=0; 704e145b35bSAl Viro 705e145b35bSAl Viro err = ext4_resize_begin(sb); 706e145b35bSAl Viro if (err) 707e145b35bSAl Viro return err; 708e145b35bSAl Viro 709e145b35bSAl Viro if (ext4_has_feature_bigalloc(sb)) { 710e145b35bSAl Viro ext4_msg(sb, KERN_ERR, 711e145b35bSAl Viro "Online resizing not supported with bigalloc"); 712e145b35bSAl Viro err = -EOPNOTSUPP; 713e145b35bSAl Viro goto group_add_out; 714e145b35bSAl Viro } 715e145b35bSAl Viro 716e145b35bSAl Viro err = mnt_want_write_file(file); 717e145b35bSAl Viro if (err) 718e145b35bSAl Viro goto group_add_out; 719e145b35bSAl Viro 720e145b35bSAl Viro err = ext4_group_add(sb, input); 721e145b35bSAl Viro if (EXT4_SB(sb)->s_journal) { 722e145b35bSAl Viro jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 723e145b35bSAl Viro err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 724e145b35bSAl Viro jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 725e145b35bSAl Viro } 726e145b35bSAl Viro if (err == 0) 727e145b35bSAl Viro err = err2; 728e145b35bSAl Viro mnt_drop_write_file(file); 729e145b35bSAl Viro if (!err && ext4_has_group_desc_csum(sb) && 730e145b35bSAl Viro test_opt(sb, INIT_INODE_TABLE)) 731e145b35bSAl Viro err = ext4_register_li_request(sb, input->group); 732e145b35bSAl Viro group_add_out: 733e145b35bSAl Viro ext4_resize_end(sb); 734e145b35bSAl Viro return err; 735e145b35bSAl Viro } 736e145b35bSAl Viro 7377b0e492eSDarrick J. Wong static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa) 738dc7ac6c4SWang Shilong { 7397b0e492eSDarrick J. Wong struct ext4_inode_info *ei = EXT4_I(inode); 740dc7ac6c4SWang Shilong 7417b0e492eSDarrick J. Wong simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags & 7427b0e492eSDarrick J. Wong EXT4_FL_USER_VISIBLE)); 743dc7ac6c4SWang Shilong 7447b0e492eSDarrick J. Wong if (ext4_has_feature_project(inode->i_sb)) 7457b0e492eSDarrick J. Wong fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid); 746dc7ac6c4SWang Shilong } 747dc7ac6c4SWang Shilong 7489b7365fcSLi Xi long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 7499b7365fcSLi Xi { 7509b7365fcSLi Xi struct inode *inode = file_inode(filp); 7519b7365fcSLi Xi struct super_block *sb = inode->i_sb; 7529b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 7539b7365fcSLi Xi unsigned int flags; 7549b7365fcSLi Xi 7559b7365fcSLi Xi ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 7569b7365fcSLi Xi 7579b7365fcSLi Xi switch (cmd) { 7580c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 7590c9ec4beSDarrick J. Wong return ext4_ioc_getfsmap(sb, (void __user *)arg); 7609b7365fcSLi Xi case EXT4_IOC_GETFLAGS: 7619b7365fcSLi Xi flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 7627ddf79a1SWang Shilong if (S_ISREG(inode->i_mode)) 7637ddf79a1SWang Shilong flags &= ~EXT4_PROJINHERIT_FL; 7649b7365fcSLi Xi return put_user(flags, (int __user *) arg); 7659b7365fcSLi Xi case EXT4_IOC_SETFLAGS: { 7669b7365fcSLi Xi int err; 7679b7365fcSLi Xi 7689b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 7699b7365fcSLi Xi return -EACCES; 7709b7365fcSLi Xi 7719b7365fcSLi Xi if (get_user(flags, (int __user *) arg)) 7729b7365fcSLi Xi return -EFAULT; 7739b7365fcSLi Xi 774d14e7683SJan Kara if (flags & ~EXT4_FL_USER_VISIBLE) 775d14e7683SJan Kara return -EOPNOTSUPP; 776d14e7683SJan Kara /* 777d14e7683SJan Kara * chattr(1) grabs flags via GETFLAGS, modifies the result and 778d14e7683SJan Kara * passes that to SETFLAGS. So we cannot easily make SETFLAGS 779d14e7683SJan Kara * more restrictive than just silently masking off visible but 780d14e7683SJan Kara * not settable flags as we always did. 781d14e7683SJan Kara */ 782d14e7683SJan Kara flags &= EXT4_FL_USER_MODIFIABLE; 783d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 784d14e7683SJan Kara return -EOPNOTSUPP; 785d14e7683SJan Kara 7869b7365fcSLi Xi err = mnt_want_write_file(filp); 7879b7365fcSLi Xi if (err) 7889b7365fcSLi Xi return err; 7899b7365fcSLi Xi 7905955102cSAl Viro inode_lock(inode); 7912e538403SDarrick J. Wong err = ext4_ioctl_check_immutable(inode, 7922e538403SDarrick J. Wong from_kprojid(&init_user_ns, ei->i_projid), 7932e538403SDarrick J. Wong flags); 7942e538403SDarrick J. Wong if (!err) 7959b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 7965955102cSAl Viro inode_unlock(inode); 7972a79f17eSAl Viro mnt_drop_write_file(filp); 798ac27a0ecSDave Kleikamp return err; 799ac27a0ecSDave Kleikamp } 800617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 801617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 802ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 803617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 804617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 805ac27a0ecSDave Kleikamp handle_t *handle; 806617ba13bSMingming Cao struct ext4_iloc iloc; 807ac27a0ecSDave Kleikamp __u32 generation; 808ac27a0ecSDave Kleikamp int err; 809ac27a0ecSDave Kleikamp 8102e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 811ac27a0ecSDave Kleikamp return -EPERM; 81242a74f20SDave Hansen 8139aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 814814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 815814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 816814525f4SDarrick J. Wong return -ENOTTY; 817814525f4SDarrick J. Wong } 818814525f4SDarrick J. Wong 819a561be71SAl Viro err = mnt_want_write_file(filp); 82042a74f20SDave Hansen if (err) 82142a74f20SDave Hansen return err; 82242a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 82342a74f20SDave Hansen err = -EFAULT; 82442a74f20SDave Hansen goto setversion_out; 82542a74f20SDave Hansen } 826ac27a0ecSDave Kleikamp 8275955102cSAl Viro inode_lock(inode); 8289924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 82942a74f20SDave Hansen if (IS_ERR(handle)) { 83042a74f20SDave Hansen err = PTR_ERR(handle); 8316c2155b9SDjalal Harouni goto unlock_out; 83242a74f20SDave Hansen } 833617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 834ac27a0ecSDave Kleikamp if (err == 0) { 835eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 836ac27a0ecSDave Kleikamp inode->i_generation = generation; 837617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 838ac27a0ecSDave Kleikamp } 839617ba13bSMingming Cao ext4_journal_stop(handle); 8406c2155b9SDjalal Harouni 8416c2155b9SDjalal Harouni unlock_out: 8425955102cSAl Viro inode_unlock(inode); 84342a74f20SDave Hansen setversion_out: 8442a79f17eSAl Viro mnt_drop_write_file(filp); 845ac27a0ecSDave Kleikamp return err; 846ac27a0ecSDave Kleikamp } 847617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 848617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 849ac046f1dSPeng Tao int err, err2=0; 850ac27a0ecSDave Kleikamp 8518f82f840SYongqiang Yang err = ext4_resize_begin(sb); 8528f82f840SYongqiang Yang if (err) 8538f82f840SYongqiang Yang return err; 854ac27a0ecSDave Kleikamp 855014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 856014a1770SDjalal Harouni err = -EFAULT; 857014a1770SDjalal Harouni goto group_extend_out; 858014a1770SDjalal Harouni } 859ac27a0ecSDave Kleikamp 860e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 861bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 862bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 863014a1770SDjalal Harouni err = -EOPNOTSUPP; 864014a1770SDjalal Harouni goto group_extend_out; 865bab08ab9STheodore Ts'o } 866bab08ab9STheodore Ts'o 867a561be71SAl Viro err = mnt_want_write_file(filp); 86842a74f20SDave Hansen if (err) 869014a1770SDjalal Harouni goto group_extend_out; 87042a74f20SDave Hansen 871617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 872ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 873dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 8747ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 875dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 876ac046f1dSPeng Tao } 8777ffe1ea8SHidehiro Kawai if (err == 0) 8787ffe1ea8SHidehiro Kawai err = err2; 8792a79f17eSAl Viro mnt_drop_write_file(filp); 880014a1770SDjalal Harouni group_extend_out: 8818f82f840SYongqiang Yang ext4_resize_end(sb); 882ac27a0ecSDave Kleikamp return err; 883ac27a0ecSDave Kleikamp } 884748de673SAkira Fujita 885748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 886748de673SAkira Fujita struct move_extent me; 8872903ff01SAl Viro struct fd donor; 8882903ff01SAl Viro int err; 889748de673SAkira Fujita 8904a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 8914a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 8924a58579bSAkira Fujita return -EBADF; 8934a58579bSAkira Fujita 894748de673SAkira Fujita if (copy_from_user(&me, 895748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 896748de673SAkira Fujita return -EFAULT; 8974a58579bSAkira Fujita me.moved_len = 0; 898748de673SAkira Fujita 8992903ff01SAl Viro donor = fdget(me.donor_fd); 9002903ff01SAl Viro if (!donor.file) 901748de673SAkira Fujita return -EBADF; 902748de673SAkira Fujita 9032903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 9044a58579bSAkira Fujita err = -EBADF; 9054a58579bSAkira Fujita goto mext_out; 906748de673SAkira Fujita } 907748de673SAkira Fujita 908e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 909bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 910bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 911399c9b86SAl Viro err = -EOPNOTSUPP; 912399c9b86SAl Viro goto mext_out; 91373f34a5eSRoss Zwisler } else if (IS_DAX(inode)) { 91473f34a5eSRoss Zwisler ext4_msg(sb, KERN_ERR, 91573f34a5eSRoss Zwisler "Online defrag not supported with DAX"); 91673f34a5eSRoss Zwisler err = -EOPNOTSUPP; 91773f34a5eSRoss Zwisler goto mext_out; 918bab08ab9STheodore Ts'o } 919bab08ab9STheodore Ts'o 920a561be71SAl Viro err = mnt_want_write_file(filp); 9214a58579bSAkira Fujita if (err) 9224a58579bSAkira Fujita goto mext_out; 9234a58579bSAkira Fujita 9242903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 925748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 9262a79f17eSAl Viro mnt_drop_write_file(filp); 927748de673SAkira Fujita 928c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 929c437b273SAkira Fujita &me, sizeof(me))) 9304a58579bSAkira Fujita err = -EFAULT; 9314a58579bSAkira Fujita mext_out: 9322903ff01SAl Viro fdput(donor); 933748de673SAkira Fujita return err; 934748de673SAkira Fujita } 935748de673SAkira Fujita 936617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 937617ba13bSMingming Cao struct ext4_new_group_data input; 938ac27a0ecSDave Kleikamp 939617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 940e145b35bSAl Viro sizeof(input))) 941e145b35bSAl Viro return -EFAULT; 942ac27a0ecSDave Kleikamp 943e145b35bSAl Viro return ext4_ioctl_group_add(filp, &input); 944ac27a0ecSDave Kleikamp } 945ac27a0ecSDave Kleikamp 946c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 9472a43a878SAneesh Kumar K.V { 9482a43a878SAneesh Kumar K.V int err; 9492e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 9502a43a878SAneesh Kumar K.V return -EACCES; 9512a43a878SAneesh Kumar K.V 952a561be71SAl Viro err = mnt_want_write_file(filp); 9532a43a878SAneesh Kumar K.V if (err) 9542a43a878SAneesh Kumar K.V return err; 9552a43a878SAneesh Kumar K.V /* 9562a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 9572a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 9582a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 9592a43a878SAneesh Kumar K.V * inode format to prevent read. 9602a43a878SAneesh Kumar K.V */ 9615955102cSAl Viro inode_lock((inode)); 9622a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 9635955102cSAl Viro inode_unlock((inode)); 9642a79f17eSAl Viro mnt_drop_write_file(filp); 9652a43a878SAneesh Kumar K.V return err; 9662a43a878SAneesh Kumar K.V } 967c14c6fd5SAneesh Kumar K.V 968ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 969ccd2506bSTheodore Ts'o { 970ccd2506bSTheodore Ts'o int err; 9712e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 972ccd2506bSTheodore Ts'o return -EACCES; 973ccd2506bSTheodore Ts'o 974a561be71SAl Viro err = mnt_want_write_file(filp); 975ccd2506bSTheodore Ts'o if (err) 976ccd2506bSTheodore Ts'o return err; 977ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 9782a79f17eSAl Viro mnt_drop_write_file(filp); 979ccd2506bSTheodore Ts'o return err; 980ccd2506bSTheodore Ts'o } 981ccd2506bSTheodore Ts'o 982393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 9833e67cfadSDmitry Monakhov { 9843e67cfadSDmitry Monakhov int err; 985393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 986393d1d1dSDr. Tilmann Bubeck return -EBADF; 9873e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 9883e67cfadSDmitry Monakhov if (err) 9893e67cfadSDmitry Monakhov return err; 9903e67cfadSDmitry Monakhov err = swap_inode_boot_loader(sb, inode); 9913e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 9923e67cfadSDmitry Monakhov return err; 9933e67cfadSDmitry Monakhov } 994393d1d1dSDr. Tilmann Bubeck 99519c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 99619c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 99719c5246dSYongqiang Yang int err = 0, err2 = 0; 9987f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 99919c5246dSYongqiang Yang 100019c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 100119c5246dSYongqiang Yang sizeof(__u64))) { 100219c5246dSYongqiang Yang return -EFAULT; 100319c5246dSYongqiang Yang } 100419c5246dSYongqiang Yang 100519c5246dSYongqiang Yang err = ext4_resize_begin(sb); 100619c5246dSYongqiang Yang if (err) 100719c5246dSYongqiang Yang return err; 100819c5246dSYongqiang Yang 10098cae6f71SAl Viro err = mnt_want_write_file(filp); 101019c5246dSYongqiang Yang if (err) 101119c5246dSYongqiang Yang goto resizefs_out; 101219c5246dSYongqiang Yang 101319c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 101419c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 101519c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 101619c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 101719c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 101819c5246dSYongqiang Yang } 101919c5246dSYongqiang Yang if (err == 0) 102019c5246dSYongqiang Yang err = err2; 10218cae6f71SAl Viro mnt_drop_write_file(filp); 1022310a997fSKirill Tkhai if (!err && (o_group < EXT4_SB(sb)->s_groups_count) && 10237f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 10247f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 10257f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 10267f511862STheodore Ts'o 102719c5246dSYongqiang Yang resizefs_out: 102819c5246dSYongqiang Yang ext4_resize_end(sb); 102919c5246dSYongqiang Yang return err; 103019c5246dSYongqiang Yang } 103119c5246dSYongqiang Yang 1032e681c047SLukas Czerner case FITRIM: 1033e681c047SLukas Czerner { 103441431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 1035e681c047SLukas Czerner struct fstrim_range range; 1036e681c047SLukas Czerner int ret = 0; 1037e681c047SLukas Czerner 1038e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 1039e681c047SLukas Czerner return -EPERM; 1040e681c047SLukas Czerner 104141431792SLukas Czerner if (!blk_queue_discard(q)) 104241431792SLukas Czerner return -EOPNOTSUPP; 104341431792SLukas Czerner 104418915b58SDarrick J. Wong /* 104518915b58SDarrick J. Wong * We haven't replayed the journal, so we cannot use our 104618915b58SDarrick J. Wong * block-bitmap-guided storage zapping commands. 104718915b58SDarrick J. Wong */ 104818915b58SDarrick J. Wong if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) 104918915b58SDarrick J. Wong return -EROFS; 105018915b58SDarrick J. Wong 1051e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 1052e681c047SLukas Czerner sizeof(range))) 1053e681c047SLukas Czerner return -EFAULT; 1054e681c047SLukas Czerner 10555c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 10565c2ed62fSLukas Czerner q->limits.discard_granularity); 1057e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 1058e681c047SLukas Czerner if (ret < 0) 1059e681c047SLukas Czerner return ret; 1060e681c047SLukas Czerner 1061e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 1062e681c047SLukas Czerner sizeof(range))) 1063e681c047SLukas Czerner return -EFAULT; 1064e681c047SLukas Czerner 1065e681c047SLukas Czerner return 0; 1066e681c047SLukas Czerner } 10677869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 10687869a4a6STheodore Ts'o return ext4_ext_precache(inode); 1069e681c047SLukas Czerner 1070db717d8eSEric Biggers case EXT4_IOC_SET_ENCRYPTION_POLICY: 10719a200d07SRichard Weinberger if (!ext4_has_feature_encrypt(sb)) 10729a200d07SRichard Weinberger return -EOPNOTSUPP; 1073db717d8eSEric Biggers return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); 10749a200d07SRichard Weinberger 10759bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: { 1076643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 10779bd8212fSMichael Halcrow int err, err2; 10789bd8212fSMichael Halcrow struct ext4_sb_info *sbi = EXT4_SB(sb); 10799bd8212fSMichael Halcrow handle_t *handle; 10809bd8212fSMichael Halcrow 108135997d1cSEric Biggers if (!ext4_has_feature_encrypt(sb)) 10829bd8212fSMichael Halcrow return -EOPNOTSUPP; 10839bd8212fSMichael Halcrow if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { 10849bd8212fSMichael Halcrow err = mnt_want_write_file(filp); 10859bd8212fSMichael Halcrow if (err) 10869bd8212fSMichael Halcrow return err; 10879bd8212fSMichael Halcrow handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 10889bd8212fSMichael Halcrow if (IS_ERR(handle)) { 10899bd8212fSMichael Halcrow err = PTR_ERR(handle); 10909bd8212fSMichael Halcrow goto pwsalt_err_exit; 10919bd8212fSMichael Halcrow } 10929bd8212fSMichael Halcrow err = ext4_journal_get_write_access(handle, sbi->s_sbh); 10939bd8212fSMichael Halcrow if (err) 10949bd8212fSMichael Halcrow goto pwsalt_err_journal; 10959bd8212fSMichael Halcrow generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); 10969bd8212fSMichael Halcrow err = ext4_handle_dirty_metadata(handle, NULL, 10979bd8212fSMichael Halcrow sbi->s_sbh); 10989bd8212fSMichael Halcrow pwsalt_err_journal: 10999bd8212fSMichael Halcrow err2 = ext4_journal_stop(handle); 11009bd8212fSMichael Halcrow if (err2 && !err) 11019bd8212fSMichael Halcrow err = err2; 11029bd8212fSMichael Halcrow pwsalt_err_exit: 11039bd8212fSMichael Halcrow mnt_drop_write_file(filp); 11049bd8212fSMichael Halcrow if (err) 11059bd8212fSMichael Halcrow return err; 11069bd8212fSMichael Halcrow } 1107b4ab9e29SFabian Frederick if (copy_to_user((void __user *) arg, 1108b4ab9e29SFabian Frederick sbi->s_es->s_encrypt_pw_salt, 16)) 11099bd8212fSMichael Halcrow return -EFAULT; 11109bd8212fSMichael Halcrow return 0; 1111ba679017SEric Biggers #else 1112ba679017SEric Biggers return -EOPNOTSUPP; 1113ba679017SEric Biggers #endif 11149bd8212fSMichael Halcrow } 1115db717d8eSEric Biggers case EXT4_IOC_GET_ENCRYPTION_POLICY: 1116db717d8eSEric Biggers return fscrypt_ioctl_get_policy(filp, (void __user *)arg); 11179bd8212fSMichael Halcrow 1118b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 1119b0c013e2STheodore Ts'o { 1120b0c013e2STheodore Ts'o if (!inode_owner_or_capable(inode)) 1121b0c013e2STheodore Ts'o return -EACCES; 1122b0c013e2STheodore Ts'o ext4_clear_inode_es(inode); 1123b0c013e2STheodore Ts'o return 0; 1124b0c013e2STheodore Ts'o } 1125b0c013e2STheodore Ts'o 11269b7365fcSLi Xi case EXT4_IOC_FSGETXATTR: 11279b7365fcSLi Xi { 11289b7365fcSLi Xi struct fsxattr fa; 11299b7365fcSLi Xi 11307b0e492eSDarrick J. Wong ext4_fill_fsxattr(inode, &fa); 11319b7365fcSLi Xi 11329b7365fcSLi Xi if (copy_to_user((struct fsxattr __user *)arg, 11339b7365fcSLi Xi &fa, sizeof(fa))) 11349b7365fcSLi Xi return -EFAULT; 11359b7365fcSLi Xi return 0; 11369b7365fcSLi Xi } 11379b7365fcSLi Xi case EXT4_IOC_FSSETXATTR: 11389b7365fcSLi Xi { 11397b0e492eSDarrick J. Wong struct fsxattr fa, old_fa; 11409b7365fcSLi Xi int err; 11419b7365fcSLi Xi 11429b7365fcSLi Xi if (copy_from_user(&fa, (struct fsxattr __user *)arg, 11439b7365fcSLi Xi sizeof(fa))) 11449b7365fcSLi Xi return -EFAULT; 11459b7365fcSLi Xi 11469b7365fcSLi Xi /* Make sure caller has proper permission */ 11479b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 11489b7365fcSLi Xi return -EACCES; 11499b7365fcSLi Xi 1150d14e7683SJan Kara if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) 1151d14e7683SJan Kara return -EOPNOTSUPP; 1152d14e7683SJan Kara 1153d14e7683SJan Kara flags = ext4_xflags_to_iflags(fa.fsx_xflags); 1154d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 1155d14e7683SJan Kara return -EOPNOTSUPP; 1156d14e7683SJan Kara 11579b7365fcSLi Xi err = mnt_want_write_file(filp); 11589b7365fcSLi Xi if (err) 11599b7365fcSLi Xi return err; 11609b7365fcSLi Xi 11615955102cSAl Viro inode_lock(inode); 11627b0e492eSDarrick J. Wong ext4_fill_fsxattr(inode, &old_fa); 11637b0e492eSDarrick J. Wong err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa); 1164dc7ac6c4SWang Shilong if (err) 1165dc7ac6c4SWang Shilong goto out; 11669b7365fcSLi Xi flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | 11679b7365fcSLi Xi (flags & EXT4_FL_XFLAG_VISIBLE); 11682e538403SDarrick J. Wong err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags); 11692e538403SDarrick J. Wong if (err) 11702e538403SDarrick J. Wong goto out; 11719b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 1172dc7ac6c4SWang Shilong if (err) 1173dc7ac6c4SWang Shilong goto out; 1174dc7ac6c4SWang Shilong err = ext4_ioctl_setproject(filp, fa.fsx_projid); 1175dc7ac6c4SWang Shilong out: 11765955102cSAl Viro inode_unlock(inode); 11779b7365fcSLi Xi mnt_drop_write_file(filp); 11789b7365fcSLi Xi return err; 11799b7365fcSLi Xi } 1180e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 1181e9be2ac7STheodore Ts'o return ext4_shutdown(sb, arg); 1182ac27a0ecSDave Kleikamp default: 1183ac27a0ecSDave Kleikamp return -ENOTTY; 1184ac27a0ecSDave Kleikamp } 1185ac27a0ecSDave Kleikamp } 1186ac27a0ecSDave Kleikamp 1187ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 1188617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1189ac27a0ecSDave Kleikamp { 1190ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 1191ac27a0ecSDave Kleikamp switch (cmd) { 1192617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 1193617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 1194ac27a0ecSDave Kleikamp break; 1195617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 1196617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 1197ac27a0ecSDave Kleikamp break; 1198617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 1199617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 1200ac27a0ecSDave Kleikamp break; 1201617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 1202617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 1203ac27a0ecSDave Kleikamp break; 1204617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 1205617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 1206ac27a0ecSDave Kleikamp break; 1207617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 1208617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 1209ac27a0ecSDave Kleikamp break; 1210617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 1211617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 1212ac27a0ecSDave Kleikamp break; 1213617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 1214617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 1215ac27a0ecSDave Kleikamp break; 1216617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 1217617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 1218ac27a0ecSDave Kleikamp break; 12194d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 12204d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 1221e145b35bSAl Viro struct ext4_new_group_data input; 12224d92dc0fSBen Hutchings int err; 12234d92dc0fSBen Hutchings 12244d92dc0fSBen Hutchings uinput = compat_ptr(arg); 12254d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 12264d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 12274d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 12284d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 12294d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 12304d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 12314d92dc0fSBen Hutchings &uinput->reserved_blocks); 12324d92dc0fSBen Hutchings if (err) 12334d92dc0fSBen Hutchings return -EFAULT; 1234e145b35bSAl Viro return ext4_ioctl_group_add(file, &input); 12354d92dc0fSBen Hutchings } 1236b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 123719c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 12387869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 12399bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: 12409bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: 12419bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: 1242e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 12430c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 1244b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 1245b684b2eeSChristian Borntraeger break; 1246ac27a0ecSDave Kleikamp default: 1247ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 1248ac27a0ecSDave Kleikamp } 12495cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 1250ac27a0ecSDave Kleikamp } 1251ac27a0ecSDave Kleikamp #endif 1252