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 330b886ee3eSGabriel Krisman Bertazi if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) { 331b886ee3eSGabriel Krisman Bertazi if (!ext4_has_feature_casefold(sb)) { 332b886ee3eSGabriel Krisman Bertazi err = -EOPNOTSUPP; 333b886ee3eSGabriel Krisman Bertazi goto flags_out; 334b886ee3eSGabriel Krisman Bertazi } 335b886ee3eSGabriel Krisman Bertazi 336b886ee3eSGabriel Krisman Bertazi if (!S_ISDIR(inode->i_mode)) { 337b886ee3eSGabriel Krisman Bertazi err = -ENOTDIR; 338b886ee3eSGabriel Krisman Bertazi goto flags_out; 339b886ee3eSGabriel Krisman Bertazi } 340b886ee3eSGabriel Krisman Bertazi 341b886ee3eSGabriel Krisman Bertazi if (!ext4_empty_dir(inode)) { 342b886ee3eSGabriel Krisman Bertazi err = -ENOTEMPTY; 343b886ee3eSGabriel Krisman Bertazi goto flags_out; 344b886ee3eSGabriel Krisman Bertazi } 345b886ee3eSGabriel Krisman Bertazi } 346b886ee3eSGabriel Krisman Bertazi 3472e538403SDarrick J. Wong /* 3482e538403SDarrick J. Wong * Wait for all pending directio and then flush all the dirty pages 3492e538403SDarrick J. Wong * for this file. The flush marks all the pages readonly, so any 3502e538403SDarrick J. Wong * subsequent attempt to write to the file (particularly mmap pages) 3512e538403SDarrick J. Wong * will come through the filesystem and fail. 3522e538403SDarrick J. Wong */ 3532e538403SDarrick J. Wong if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) && 3542e538403SDarrick J. Wong (flags & EXT4_IMMUTABLE_FL)) { 3552e538403SDarrick J. Wong inode_dio_wait(inode); 3562e538403SDarrick J. Wong err = filemap_write_and_wait(inode->i_mapping); 3572e538403SDarrick J. Wong if (err) 3582e538403SDarrick J. Wong goto flags_out; 3592e538403SDarrick J. Wong } 3602e538403SDarrick J. Wong 3619924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 362ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 36342a74f20SDave Hansen err = PTR_ERR(handle); 36442a74f20SDave Hansen goto flags_out; 365ac27a0ecSDave Kleikamp } 366ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 3670390131bSFrank Mayhar ext4_handle_sync(handle); 368617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 369ac27a0ecSDave Kleikamp if (err) 370ac27a0ecSDave Kleikamp goto flags_err; 371ac27a0ecSDave Kleikamp 37279906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 37379906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 37479906964STheodore Ts'o continue; 375f8011d93SJan Kara /* These flags get special treatment later */ 376f8011d93SJan Kara if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) 377f8011d93SJan Kara continue; 37879906964STheodore Ts'o if (mask & flags) 37979906964STheodore Ts'o ext4_set_inode_flag(inode, i); 38079906964STheodore Ts'o else 38179906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 38279906964STheodore Ts'o } 383ac27a0ecSDave Kleikamp 384617ba13bSMingming Cao ext4_set_inode_flags(inode); 385eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 386ac27a0ecSDave Kleikamp 387617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 388ac27a0ecSDave Kleikamp flags_err: 389617ba13bSMingming Cao ext4_journal_stop(handle); 39042a74f20SDave Hansen if (err) 39142a74f20SDave Hansen goto flags_out; 392ac27a0ecSDave Kleikamp 393e9072d85SRoss Zwisler if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 394e9072d85SRoss Zwisler /* 395e9072d85SRoss Zwisler * Changes to the journaling mode can cause unsafe changes to 396ff694ab6SIra Weiny * S_DAX if the inode is DAX 397e9072d85SRoss Zwisler */ 398ff694ab6SIra Weiny if (IS_DAX(inode)) { 399e9072d85SRoss Zwisler err = -EBUSY; 400e9072d85SRoss Zwisler goto flags_out; 401e9072d85SRoss Zwisler } 402e9072d85SRoss Zwisler 403617ba13bSMingming Cao err = ext4_change_inode_journal_flag(inode, jflag); 4044db46fc2SAneesh Kumar K.V if (err) 4054db46fc2SAneesh Kumar K.V goto flags_out; 406e9072d85SRoss Zwisler } 407996bb9fdSTheodore Ts'o if (migrate) { 408996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 4094db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 410996bb9fdSTheodore Ts'o else 411996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 412996bb9fdSTheodore Ts'o } 413996bb9fdSTheodore Ts'o 41442a74f20SDave Hansen flags_out: 4159b7365fcSLi Xi return err; 4169b7365fcSLi Xi } 4179b7365fcSLi Xi 4189b7365fcSLi Xi #ifdef CONFIG_QUOTA 4199b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 4209b7365fcSLi Xi { 4219b7365fcSLi Xi struct inode *inode = file_inode(filp); 4229b7365fcSLi Xi struct super_block *sb = inode->i_sb; 4239b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 4249b7365fcSLi Xi int err, rc; 4259b7365fcSLi Xi handle_t *handle; 4269b7365fcSLi Xi kprojid_t kprojid; 4279b7365fcSLi Xi struct ext4_iloc iloc; 4289b7365fcSLi Xi struct ext4_inode *raw_inode; 429079788d0SWang Shilong struct dquot *transfer_to[MAXQUOTAS] = { }; 4309b7365fcSLi Xi 4310b7b7779SKaho Ng if (!ext4_has_feature_project(sb)) { 4329b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 4339b7365fcSLi Xi return -EOPNOTSUPP; 4349b7365fcSLi Xi else 4359b7365fcSLi Xi return 0; 4369b7365fcSLi Xi } 4379b7365fcSLi Xi 4389b7365fcSLi Xi if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 4399b7365fcSLi Xi return -EOPNOTSUPP; 4409b7365fcSLi Xi 4419b7365fcSLi Xi kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 4429b7365fcSLi Xi 4439b7365fcSLi Xi if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 4449b7365fcSLi Xi return 0; 4459b7365fcSLi Xi 4469b7365fcSLi Xi err = -EPERM; 4479b7365fcSLi Xi /* Is it quota file? Do not allow user to mess with it */ 44802749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 449dc7ac6c4SWang Shilong return err; 4509b7365fcSLi Xi 4519b7365fcSLi Xi err = ext4_get_inode_loc(inode, &iloc); 4529b7365fcSLi Xi if (err) 453dc7ac6c4SWang Shilong return err; 4549b7365fcSLi Xi 4559b7365fcSLi Xi raw_inode = ext4_raw_inode(&iloc); 4569b7365fcSLi Xi if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 457c03b45b8SMiao Xie err = ext4_expand_extra_isize(inode, 458c03b45b8SMiao Xie EXT4_SB(sb)->s_want_extra_isize, 459c03b45b8SMiao Xie &iloc); 460c03b45b8SMiao Xie if (err) 461dc7ac6c4SWang Shilong return err; 462c03b45b8SMiao Xie } else { 4639b7365fcSLi Xi brelse(iloc.bh); 464c03b45b8SMiao Xie } 4659b7365fcSLi Xi 466182a79e0SWang Shilong err = dquot_initialize(inode); 467182a79e0SWang Shilong if (err) 468182a79e0SWang Shilong return err; 4699b7365fcSLi Xi 4709b7365fcSLi Xi handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 4719b7365fcSLi Xi EXT4_QUOTA_INIT_BLOCKS(sb) + 4729b7365fcSLi Xi EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 473dc7ac6c4SWang Shilong if (IS_ERR(handle)) 474dc7ac6c4SWang Shilong return PTR_ERR(handle); 4759b7365fcSLi Xi 4769b7365fcSLi Xi err = ext4_reserve_inode_write(handle, inode, &iloc); 4779b7365fcSLi Xi if (err) 4789b7365fcSLi Xi goto out_stop; 4799b7365fcSLi Xi 4809b7365fcSLi Xi transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 481ff0bc084SSeth Forshee if (!IS_ERR(transfer_to[PRJQUOTA])) { 4827a9ca53aSTahsin Erdogan 4837a9ca53aSTahsin Erdogan /* __dquot_transfer() calls back ext4_get_inode_usage() which 4847a9ca53aSTahsin Erdogan * counts xattr inode references. 4857a9ca53aSTahsin Erdogan */ 4867a9ca53aSTahsin Erdogan down_read(&EXT4_I(inode)->xattr_sem); 4879b7365fcSLi Xi err = __dquot_transfer(inode, transfer_to); 4887a9ca53aSTahsin Erdogan up_read(&EXT4_I(inode)->xattr_sem); 4899b7365fcSLi Xi dqput(transfer_to[PRJQUOTA]); 4909b7365fcSLi Xi if (err) 4919b7365fcSLi Xi goto out_dirty; 4929b7365fcSLi Xi } 493079788d0SWang Shilong 4949b7365fcSLi Xi EXT4_I(inode)->i_projid = kprojid; 495eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 4969b7365fcSLi Xi out_dirty: 4979b7365fcSLi Xi rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 4989b7365fcSLi Xi if (!err) 4999b7365fcSLi Xi err = rc; 5009b7365fcSLi Xi out_stop: 5019b7365fcSLi Xi ext4_journal_stop(handle); 5029b7365fcSLi Xi return err; 5039b7365fcSLi Xi } 5049b7365fcSLi Xi #else 5059b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 5069b7365fcSLi Xi { 5079b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 5089b7365fcSLi Xi return -EOPNOTSUPP; 5099b7365fcSLi Xi return 0; 5109b7365fcSLi Xi } 5119b7365fcSLi Xi #endif 5129b7365fcSLi Xi 5139b7365fcSLi Xi /* Transfer internal flags to xflags */ 5149b7365fcSLi Xi static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) 5159b7365fcSLi Xi { 5169b7365fcSLi Xi __u32 xflags = 0; 5179b7365fcSLi Xi 5189b7365fcSLi Xi if (iflags & EXT4_SYNC_FL) 5199b7365fcSLi Xi xflags |= FS_XFLAG_SYNC; 5209b7365fcSLi Xi if (iflags & EXT4_IMMUTABLE_FL) 5219b7365fcSLi Xi xflags |= FS_XFLAG_IMMUTABLE; 5229b7365fcSLi Xi if (iflags & EXT4_APPEND_FL) 5239b7365fcSLi Xi xflags |= FS_XFLAG_APPEND; 5249b7365fcSLi Xi if (iflags & EXT4_NODUMP_FL) 5259b7365fcSLi Xi xflags |= FS_XFLAG_NODUMP; 5269b7365fcSLi Xi if (iflags & EXT4_NOATIME_FL) 5279b7365fcSLi Xi xflags |= FS_XFLAG_NOATIME; 5289b7365fcSLi Xi if (iflags & EXT4_PROJINHERIT_FL) 5299b7365fcSLi Xi xflags |= FS_XFLAG_PROJINHERIT; 5309b7365fcSLi Xi return xflags; 5319b7365fcSLi Xi } 5329b7365fcSLi Xi 533d14e7683SJan Kara #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ 534d14e7683SJan Kara FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ 535d14e7683SJan Kara FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT) 536d14e7683SJan Kara 5379b7365fcSLi Xi /* Transfer xflags flags to internal */ 5389b7365fcSLi Xi static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) 5399b7365fcSLi Xi { 5409b7365fcSLi Xi unsigned long iflags = 0; 5419b7365fcSLi Xi 5429b7365fcSLi Xi if (xflags & FS_XFLAG_SYNC) 5439b7365fcSLi Xi iflags |= EXT4_SYNC_FL; 5449b7365fcSLi Xi if (xflags & FS_XFLAG_IMMUTABLE) 5459b7365fcSLi Xi iflags |= EXT4_IMMUTABLE_FL; 5469b7365fcSLi Xi if (xflags & FS_XFLAG_APPEND) 5479b7365fcSLi Xi iflags |= EXT4_APPEND_FL; 5489b7365fcSLi Xi if (xflags & FS_XFLAG_NODUMP) 5499b7365fcSLi Xi iflags |= EXT4_NODUMP_FL; 5509b7365fcSLi Xi if (xflags & FS_XFLAG_NOATIME) 5519b7365fcSLi Xi iflags |= EXT4_NOATIME_FL; 5529b7365fcSLi Xi if (xflags & FS_XFLAG_PROJINHERIT) 5539b7365fcSLi Xi iflags |= EXT4_PROJINHERIT_FL; 5549b7365fcSLi Xi 5559b7365fcSLi Xi return iflags; 5569b7365fcSLi Xi } 5579b7365fcSLi Xi 5581a20a630SEric Biggers static int ext4_shutdown(struct super_block *sb, unsigned long arg) 559783d9485STheodore Ts'o { 560783d9485STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 561783d9485STheodore Ts'o __u32 flags; 562783d9485STheodore Ts'o 563783d9485STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 564783d9485STheodore Ts'o return -EPERM; 565783d9485STheodore Ts'o 566783d9485STheodore Ts'o if (get_user(flags, (__u32 __user *)arg)) 567783d9485STheodore Ts'o return -EFAULT; 568783d9485STheodore Ts'o 569783d9485STheodore Ts'o if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) 570783d9485STheodore Ts'o return -EINVAL; 571783d9485STheodore Ts'o 572783d9485STheodore Ts'o if (ext4_forced_shutdown(sbi)) 573783d9485STheodore Ts'o return 0; 574783d9485STheodore Ts'o 575783d9485STheodore Ts'o ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); 576ccf0f32aSTheodore Ts'o trace_ext4_shutdown(sb, flags); 577783d9485STheodore Ts'o 578783d9485STheodore Ts'o switch (flags) { 579783d9485STheodore Ts'o case EXT4_GOING_FLAGS_DEFAULT: 580783d9485STheodore Ts'o freeze_bdev(sb->s_bdev); 581783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 582783d9485STheodore Ts'o thaw_bdev(sb->s_bdev, sb); 583783d9485STheodore Ts'o break; 584783d9485STheodore Ts'o case EXT4_GOING_FLAGS_LOGFLUSH: 585783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 586783d9485STheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { 587783d9485STheodore Ts'o (void) ext4_force_commit(sb); 588fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 589783d9485STheodore Ts'o } 590783d9485STheodore Ts'o break; 591783d9485STheodore Ts'o case EXT4_GOING_FLAGS_NOLOGFLUSH: 592783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 593a6d9946bSTheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) 594fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 595783d9485STheodore Ts'o break; 596783d9485STheodore Ts'o default: 597783d9485STheodore Ts'o return -EINVAL; 598783d9485STheodore Ts'o } 599783d9485STheodore Ts'o clear_opt(sb, DISCARD); 600783d9485STheodore Ts'o return 0; 601783d9485STheodore Ts'o } 602783d9485STheodore Ts'o 6030c9ec4beSDarrick J. Wong struct getfsmap_info { 6040c9ec4beSDarrick J. Wong struct super_block *gi_sb; 6050c9ec4beSDarrick J. Wong struct fsmap_head __user *gi_data; 6060c9ec4beSDarrick J. Wong unsigned int gi_idx; 6070c9ec4beSDarrick J. Wong __u32 gi_last_flags; 6080c9ec4beSDarrick J. Wong }; 6090c9ec4beSDarrick J. Wong 6100c9ec4beSDarrick J. Wong static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) 6110c9ec4beSDarrick J. Wong { 6120c9ec4beSDarrick J. Wong struct getfsmap_info *info = priv; 6130c9ec4beSDarrick J. Wong struct fsmap fm; 6140c9ec4beSDarrick J. Wong 6150c9ec4beSDarrick J. Wong trace_ext4_getfsmap_mapping(info->gi_sb, xfm); 6160c9ec4beSDarrick J. Wong 6170c9ec4beSDarrick J. Wong info->gi_last_flags = xfm->fmr_flags; 6180c9ec4beSDarrick J. Wong ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); 6190c9ec4beSDarrick J. Wong if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, 6200c9ec4beSDarrick J. Wong sizeof(struct fsmap))) 6210c9ec4beSDarrick J. Wong return -EFAULT; 6220c9ec4beSDarrick J. Wong 6230c9ec4beSDarrick J. Wong return 0; 6240c9ec4beSDarrick J. Wong } 6250c9ec4beSDarrick J. Wong 6260c9ec4beSDarrick J. Wong static int ext4_ioc_getfsmap(struct super_block *sb, 6270c9ec4beSDarrick J. Wong struct fsmap_head __user *arg) 6280c9ec4beSDarrick J. Wong { 6290ba33facSTheodore Ts'o struct getfsmap_info info = { NULL }; 6300c9ec4beSDarrick J. Wong struct ext4_fsmap_head xhead = {0}; 6310c9ec4beSDarrick J. Wong struct fsmap_head head; 6320c9ec4beSDarrick J. Wong bool aborted = false; 6330c9ec4beSDarrick J. Wong int error; 6340c9ec4beSDarrick J. Wong 6350c9ec4beSDarrick J. Wong if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 6360c9ec4beSDarrick J. Wong return -EFAULT; 6370c9ec4beSDarrick J. Wong if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 6380c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 6390c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[0].fmr_reserved)) || 6400c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 6410c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[1].fmr_reserved))) 6420c9ec4beSDarrick J. Wong return -EINVAL; 6430c9ec4beSDarrick J. Wong /* 6440c9ec4beSDarrick J. Wong * ext4 doesn't report file extents at all, so the only valid 6450c9ec4beSDarrick J. Wong * file offsets are the magic ones (all zeroes or all ones). 6460c9ec4beSDarrick J. Wong */ 6470c9ec4beSDarrick J. Wong if (head.fmh_keys[0].fmr_offset || 6480c9ec4beSDarrick J. Wong (head.fmh_keys[1].fmr_offset != 0 && 6490c9ec4beSDarrick J. Wong head.fmh_keys[1].fmr_offset != -1ULL)) 6500c9ec4beSDarrick J. Wong return -EINVAL; 6510c9ec4beSDarrick J. Wong 6520c9ec4beSDarrick J. Wong xhead.fmh_iflags = head.fmh_iflags; 6530c9ec4beSDarrick J. Wong xhead.fmh_count = head.fmh_count; 6540c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); 6550c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); 6560c9ec4beSDarrick J. Wong 6570c9ec4beSDarrick J. Wong trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); 6580c9ec4beSDarrick J. Wong trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); 6590c9ec4beSDarrick J. Wong 6600c9ec4beSDarrick J. Wong info.gi_sb = sb; 6610c9ec4beSDarrick J. Wong info.gi_data = arg; 6620c9ec4beSDarrick J. Wong error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); 6630c9ec4beSDarrick J. Wong if (error == EXT4_QUERY_RANGE_ABORT) { 6640c9ec4beSDarrick J. Wong error = 0; 6650c9ec4beSDarrick J. Wong aborted = true; 6660c9ec4beSDarrick J. Wong } else if (error) 6670c9ec4beSDarrick J. Wong return error; 6680c9ec4beSDarrick J. Wong 6690c9ec4beSDarrick J. Wong /* If we didn't abort, set the "last" flag in the last fmx */ 6700c9ec4beSDarrick J. Wong if (!aborted && info.gi_idx) { 6710c9ec4beSDarrick J. Wong info.gi_last_flags |= FMR_OF_LAST; 6720c9ec4beSDarrick J. Wong if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, 6730c9ec4beSDarrick J. Wong &info.gi_last_flags, 6740c9ec4beSDarrick J. Wong sizeof(info.gi_last_flags))) 6750c9ec4beSDarrick J. Wong return -EFAULT; 6760c9ec4beSDarrick J. Wong } 6770c9ec4beSDarrick J. Wong 6780c9ec4beSDarrick J. Wong /* copy back header */ 6790c9ec4beSDarrick J. Wong head.fmh_entries = xhead.fmh_entries; 6800c9ec4beSDarrick J. Wong head.fmh_oflags = xhead.fmh_oflags; 6810c9ec4beSDarrick J. Wong if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 6820c9ec4beSDarrick J. Wong return -EFAULT; 6830c9ec4beSDarrick J. Wong 6840c9ec4beSDarrick J. Wong return 0; 6850c9ec4beSDarrick J. Wong } 6860c9ec4beSDarrick J. Wong 687e145b35bSAl Viro static long ext4_ioctl_group_add(struct file *file, 688e145b35bSAl Viro struct ext4_new_group_data *input) 689e145b35bSAl Viro { 690e145b35bSAl Viro struct super_block *sb = file_inode(file)->i_sb; 691e145b35bSAl Viro int err, err2=0; 692e145b35bSAl Viro 693e145b35bSAl Viro err = ext4_resize_begin(sb); 694e145b35bSAl Viro if (err) 695e145b35bSAl Viro return err; 696e145b35bSAl Viro 697e145b35bSAl Viro if (ext4_has_feature_bigalloc(sb)) { 698e145b35bSAl Viro ext4_msg(sb, KERN_ERR, 699e145b35bSAl Viro "Online resizing not supported with bigalloc"); 700e145b35bSAl Viro err = -EOPNOTSUPP; 701e145b35bSAl Viro goto group_add_out; 702e145b35bSAl Viro } 703e145b35bSAl Viro 704e145b35bSAl Viro err = mnt_want_write_file(file); 705e145b35bSAl Viro if (err) 706e145b35bSAl Viro goto group_add_out; 707e145b35bSAl Viro 708e145b35bSAl Viro err = ext4_group_add(sb, input); 709e145b35bSAl Viro if (EXT4_SB(sb)->s_journal) { 710e145b35bSAl Viro jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 711e145b35bSAl Viro err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 712e145b35bSAl Viro jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 713e145b35bSAl Viro } 714e145b35bSAl Viro if (err == 0) 715e145b35bSAl Viro err = err2; 716e145b35bSAl Viro mnt_drop_write_file(file); 717e145b35bSAl Viro if (!err && ext4_has_group_desc_csum(sb) && 718e145b35bSAl Viro test_opt(sb, INIT_INODE_TABLE)) 719e145b35bSAl Viro err = ext4_register_li_request(sb, input->group); 720e145b35bSAl Viro group_add_out: 721e145b35bSAl Viro ext4_resize_end(sb); 722e145b35bSAl Viro return err; 723e145b35bSAl Viro } 724e145b35bSAl Viro 7257b0e492eSDarrick J. Wong static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa) 726dc7ac6c4SWang Shilong { 7277b0e492eSDarrick J. Wong struct ext4_inode_info *ei = EXT4_I(inode); 728dc7ac6c4SWang Shilong 7297b0e492eSDarrick J. Wong simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags & 7307b0e492eSDarrick J. Wong EXT4_FL_USER_VISIBLE)); 731dc7ac6c4SWang Shilong 7327b0e492eSDarrick J. Wong if (ext4_has_feature_project(inode->i_sb)) 7337b0e492eSDarrick J. Wong fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid); 734dc7ac6c4SWang Shilong } 735dc7ac6c4SWang Shilong 736bb5835edSTheodore Ts'o /* copied from fs/ioctl.c */ 737bb5835edSTheodore Ts'o static int fiemap_check_ranges(struct super_block *sb, 738bb5835edSTheodore Ts'o u64 start, u64 len, u64 *new_len) 739bb5835edSTheodore Ts'o { 740bb5835edSTheodore Ts'o u64 maxbytes = (u64) sb->s_maxbytes; 741bb5835edSTheodore Ts'o 742bb5835edSTheodore Ts'o *new_len = len; 743bb5835edSTheodore Ts'o 744bb5835edSTheodore Ts'o if (len == 0) 745bb5835edSTheodore Ts'o return -EINVAL; 746bb5835edSTheodore Ts'o 747bb5835edSTheodore Ts'o if (start > maxbytes) 748bb5835edSTheodore Ts'o return -EFBIG; 749bb5835edSTheodore Ts'o 750bb5835edSTheodore Ts'o /* 751bb5835edSTheodore Ts'o * Shrink request scope to what the fs can actually handle. 752bb5835edSTheodore Ts'o */ 753bb5835edSTheodore Ts'o if (len > maxbytes || (maxbytes - len) < start) 754bb5835edSTheodore Ts'o *new_len = maxbytes - start; 755bb5835edSTheodore Ts'o 756bb5835edSTheodore Ts'o return 0; 757bb5835edSTheodore Ts'o } 758bb5835edSTheodore Ts'o 759bb5835edSTheodore Ts'o /* So that the fiemap access checks can't overflow on 32 bit machines. */ 760bb5835edSTheodore Ts'o #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) 761bb5835edSTheodore Ts'o 762bb5835edSTheodore Ts'o static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg) 763bb5835edSTheodore Ts'o { 764bb5835edSTheodore Ts'o struct fiemap fiemap; 765bb5835edSTheodore Ts'o struct fiemap __user *ufiemap = (struct fiemap __user *) arg; 766bb5835edSTheodore Ts'o struct fiemap_extent_info fieinfo = { 0, }; 767bb5835edSTheodore Ts'o struct inode *inode = file_inode(filp); 768bb5835edSTheodore Ts'o struct super_block *sb = inode->i_sb; 769bb5835edSTheodore Ts'o u64 len; 770bb5835edSTheodore Ts'o int error; 771bb5835edSTheodore Ts'o 772bb5835edSTheodore Ts'o if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap))) 773bb5835edSTheodore Ts'o return -EFAULT; 774bb5835edSTheodore Ts'o 775bb5835edSTheodore Ts'o if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) 776bb5835edSTheodore Ts'o return -EINVAL; 777bb5835edSTheodore Ts'o 778bb5835edSTheodore Ts'o error = fiemap_check_ranges(sb, fiemap.fm_start, fiemap.fm_length, 779bb5835edSTheodore Ts'o &len); 780bb5835edSTheodore Ts'o if (error) 781bb5835edSTheodore Ts'o return error; 782bb5835edSTheodore Ts'o 783bb5835edSTheodore Ts'o fieinfo.fi_flags = fiemap.fm_flags; 784bb5835edSTheodore Ts'o fieinfo.fi_extents_max = fiemap.fm_extent_count; 785bb5835edSTheodore Ts'o fieinfo.fi_extents_start = ufiemap->fm_extents; 786bb5835edSTheodore Ts'o 787bb5835edSTheodore Ts'o if (fiemap.fm_extent_count != 0 && 788bb5835edSTheodore Ts'o !access_ok(fieinfo.fi_extents_start, 789bb5835edSTheodore Ts'o fieinfo.fi_extents_max * sizeof(struct fiemap_extent))) 790bb5835edSTheodore Ts'o return -EFAULT; 791bb5835edSTheodore Ts'o 792bb5835edSTheodore Ts'o if (fieinfo.fi_flags & FIEMAP_FLAG_SYNC) 793bb5835edSTheodore Ts'o filemap_write_and_wait(inode->i_mapping); 794bb5835edSTheodore Ts'o 795bb5835edSTheodore Ts'o error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, len); 796bb5835edSTheodore Ts'o fiemap.fm_flags = fieinfo.fi_flags; 797bb5835edSTheodore Ts'o fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; 798bb5835edSTheodore Ts'o if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap))) 799bb5835edSTheodore Ts'o error = -EFAULT; 800bb5835edSTheodore Ts'o 801bb5835edSTheodore Ts'o return error; 802bb5835edSTheodore Ts'o } 803bb5835edSTheodore Ts'o 8049b7365fcSLi Xi long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 8059b7365fcSLi Xi { 8069b7365fcSLi Xi struct inode *inode = file_inode(filp); 8079b7365fcSLi Xi struct super_block *sb = inode->i_sb; 8089b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 8099b7365fcSLi Xi unsigned int flags; 8109b7365fcSLi Xi 8119b7365fcSLi Xi ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 8129b7365fcSLi Xi 8139b7365fcSLi Xi switch (cmd) { 8140c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 8150c9ec4beSDarrick J. Wong return ext4_ioc_getfsmap(sb, (void __user *)arg); 8169b7365fcSLi Xi case EXT4_IOC_GETFLAGS: 8179b7365fcSLi Xi flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 8187ddf79a1SWang Shilong if (S_ISREG(inode->i_mode)) 8197ddf79a1SWang Shilong flags &= ~EXT4_PROJINHERIT_FL; 8209b7365fcSLi Xi return put_user(flags, (int __user *) arg); 8219b7365fcSLi Xi case EXT4_IOC_SETFLAGS: { 8229b7365fcSLi Xi int err; 8239b7365fcSLi Xi 8249b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 8259b7365fcSLi Xi return -EACCES; 8269b7365fcSLi Xi 8279b7365fcSLi Xi if (get_user(flags, (int __user *) arg)) 8289b7365fcSLi Xi return -EFAULT; 8299b7365fcSLi Xi 830d14e7683SJan Kara if (flags & ~EXT4_FL_USER_VISIBLE) 831d14e7683SJan Kara return -EOPNOTSUPP; 832d14e7683SJan Kara /* 833d14e7683SJan Kara * chattr(1) grabs flags via GETFLAGS, modifies the result and 834d14e7683SJan Kara * passes that to SETFLAGS. So we cannot easily make SETFLAGS 835d14e7683SJan Kara * more restrictive than just silently masking off visible but 836d14e7683SJan Kara * not settable flags as we always did. 837d14e7683SJan Kara */ 838d14e7683SJan Kara flags &= EXT4_FL_USER_MODIFIABLE; 839d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 840d14e7683SJan Kara return -EOPNOTSUPP; 841d14e7683SJan Kara 8429b7365fcSLi Xi err = mnt_want_write_file(filp); 8439b7365fcSLi Xi if (err) 8449b7365fcSLi Xi return err; 8459b7365fcSLi Xi 8465955102cSAl Viro inode_lock(inode); 8472e538403SDarrick J. Wong err = ext4_ioctl_check_immutable(inode, 8482e538403SDarrick J. Wong from_kprojid(&init_user_ns, ei->i_projid), 8492e538403SDarrick J. Wong flags); 8502e538403SDarrick J. Wong if (!err) 8519b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 8525955102cSAl Viro inode_unlock(inode); 8532a79f17eSAl Viro mnt_drop_write_file(filp); 854ac27a0ecSDave Kleikamp return err; 855ac27a0ecSDave Kleikamp } 856617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 857617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 858ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 859617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 860617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 861ac27a0ecSDave Kleikamp handle_t *handle; 862617ba13bSMingming Cao struct ext4_iloc iloc; 863ac27a0ecSDave Kleikamp __u32 generation; 864ac27a0ecSDave Kleikamp int err; 865ac27a0ecSDave Kleikamp 8662e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 867ac27a0ecSDave Kleikamp return -EPERM; 86842a74f20SDave Hansen 8699aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 870814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 871814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 872814525f4SDarrick J. Wong return -ENOTTY; 873814525f4SDarrick J. Wong } 874814525f4SDarrick J. Wong 875a561be71SAl Viro err = mnt_want_write_file(filp); 87642a74f20SDave Hansen if (err) 87742a74f20SDave Hansen return err; 87842a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 87942a74f20SDave Hansen err = -EFAULT; 88042a74f20SDave Hansen goto setversion_out; 88142a74f20SDave Hansen } 882ac27a0ecSDave Kleikamp 8835955102cSAl Viro inode_lock(inode); 8849924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 88542a74f20SDave Hansen if (IS_ERR(handle)) { 88642a74f20SDave Hansen err = PTR_ERR(handle); 8876c2155b9SDjalal Harouni goto unlock_out; 88842a74f20SDave Hansen } 889617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 890ac27a0ecSDave Kleikamp if (err == 0) { 891eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 892ac27a0ecSDave Kleikamp inode->i_generation = generation; 893617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 894ac27a0ecSDave Kleikamp } 895617ba13bSMingming Cao ext4_journal_stop(handle); 8966c2155b9SDjalal Harouni 8976c2155b9SDjalal Harouni unlock_out: 8985955102cSAl Viro inode_unlock(inode); 89942a74f20SDave Hansen setversion_out: 9002a79f17eSAl Viro mnt_drop_write_file(filp); 901ac27a0ecSDave Kleikamp return err; 902ac27a0ecSDave Kleikamp } 903617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 904617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 905ac046f1dSPeng Tao int err, err2=0; 906ac27a0ecSDave Kleikamp 9078f82f840SYongqiang Yang err = ext4_resize_begin(sb); 9088f82f840SYongqiang Yang if (err) 9098f82f840SYongqiang Yang return err; 910ac27a0ecSDave Kleikamp 911014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 912014a1770SDjalal Harouni err = -EFAULT; 913014a1770SDjalal Harouni goto group_extend_out; 914014a1770SDjalal Harouni } 915ac27a0ecSDave Kleikamp 916e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 917bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 918bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 919014a1770SDjalal Harouni err = -EOPNOTSUPP; 920014a1770SDjalal Harouni goto group_extend_out; 921bab08ab9STheodore Ts'o } 922bab08ab9STheodore Ts'o 923a561be71SAl Viro err = mnt_want_write_file(filp); 92442a74f20SDave Hansen if (err) 925014a1770SDjalal Harouni goto group_extend_out; 92642a74f20SDave Hansen 927617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 928ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 929dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 9307ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 931dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 932ac046f1dSPeng Tao } 9337ffe1ea8SHidehiro Kawai if (err == 0) 9347ffe1ea8SHidehiro Kawai err = err2; 9352a79f17eSAl Viro mnt_drop_write_file(filp); 936014a1770SDjalal Harouni group_extend_out: 9378f82f840SYongqiang Yang ext4_resize_end(sb); 938ac27a0ecSDave Kleikamp return err; 939ac27a0ecSDave Kleikamp } 940748de673SAkira Fujita 941748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 942748de673SAkira Fujita struct move_extent me; 9432903ff01SAl Viro struct fd donor; 9442903ff01SAl Viro int err; 945748de673SAkira Fujita 9464a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 9474a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 9484a58579bSAkira Fujita return -EBADF; 9494a58579bSAkira Fujita 950748de673SAkira Fujita if (copy_from_user(&me, 951748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 952748de673SAkira Fujita return -EFAULT; 9534a58579bSAkira Fujita me.moved_len = 0; 954748de673SAkira Fujita 9552903ff01SAl Viro donor = fdget(me.donor_fd); 9562903ff01SAl Viro if (!donor.file) 957748de673SAkira Fujita return -EBADF; 958748de673SAkira Fujita 9592903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 9604a58579bSAkira Fujita err = -EBADF; 9614a58579bSAkira Fujita goto mext_out; 962748de673SAkira Fujita } 963748de673SAkira Fujita 964e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 965bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 966bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 967399c9b86SAl Viro err = -EOPNOTSUPP; 968399c9b86SAl Viro goto mext_out; 96973f34a5eSRoss Zwisler } else if (IS_DAX(inode)) { 97073f34a5eSRoss Zwisler ext4_msg(sb, KERN_ERR, 97173f34a5eSRoss Zwisler "Online defrag not supported with DAX"); 97273f34a5eSRoss Zwisler err = -EOPNOTSUPP; 97373f34a5eSRoss Zwisler goto mext_out; 974bab08ab9STheodore Ts'o } 975bab08ab9STheodore Ts'o 976a561be71SAl Viro err = mnt_want_write_file(filp); 9774a58579bSAkira Fujita if (err) 9784a58579bSAkira Fujita goto mext_out; 9794a58579bSAkira Fujita 9802903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 981748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 9822a79f17eSAl Viro mnt_drop_write_file(filp); 983748de673SAkira Fujita 984c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 985c437b273SAkira Fujita &me, sizeof(me))) 9864a58579bSAkira Fujita err = -EFAULT; 9874a58579bSAkira Fujita mext_out: 9882903ff01SAl Viro fdput(donor); 989748de673SAkira Fujita return err; 990748de673SAkira Fujita } 991748de673SAkira Fujita 992617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 993617ba13bSMingming Cao struct ext4_new_group_data input; 994ac27a0ecSDave Kleikamp 995617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 996e145b35bSAl Viro sizeof(input))) 997e145b35bSAl Viro return -EFAULT; 998ac27a0ecSDave Kleikamp 999e145b35bSAl Viro return ext4_ioctl_group_add(filp, &input); 1000ac27a0ecSDave Kleikamp } 1001ac27a0ecSDave Kleikamp 1002c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 10032a43a878SAneesh Kumar K.V { 10042a43a878SAneesh Kumar K.V int err; 10052e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 10062a43a878SAneesh Kumar K.V return -EACCES; 10072a43a878SAneesh Kumar K.V 1008a561be71SAl Viro err = mnt_want_write_file(filp); 10092a43a878SAneesh Kumar K.V if (err) 10102a43a878SAneesh Kumar K.V return err; 10112a43a878SAneesh Kumar K.V /* 10122a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 10132a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 10142a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 10152a43a878SAneesh Kumar K.V * inode format to prevent read. 10162a43a878SAneesh Kumar K.V */ 10175955102cSAl Viro inode_lock((inode)); 10182a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 10195955102cSAl Viro inode_unlock((inode)); 10202a79f17eSAl Viro mnt_drop_write_file(filp); 10212a43a878SAneesh Kumar K.V return err; 10222a43a878SAneesh Kumar K.V } 1023c14c6fd5SAneesh Kumar K.V 1024ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 1025ccd2506bSTheodore Ts'o { 1026ccd2506bSTheodore Ts'o int err; 10272e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 1028ccd2506bSTheodore Ts'o return -EACCES; 1029ccd2506bSTheodore Ts'o 1030a561be71SAl Viro err = mnt_want_write_file(filp); 1031ccd2506bSTheodore Ts'o if (err) 1032ccd2506bSTheodore Ts'o return err; 1033ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 10342a79f17eSAl Viro mnt_drop_write_file(filp); 1035ccd2506bSTheodore Ts'o return err; 1036ccd2506bSTheodore Ts'o } 1037ccd2506bSTheodore Ts'o 1038393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 10393e67cfadSDmitry Monakhov { 10403e67cfadSDmitry Monakhov int err; 1041393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 1042393d1d1dSDr. Tilmann Bubeck return -EBADF; 10433e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 10443e67cfadSDmitry Monakhov if (err) 10453e67cfadSDmitry Monakhov return err; 10463e67cfadSDmitry Monakhov err = swap_inode_boot_loader(sb, inode); 10473e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 10483e67cfadSDmitry Monakhov return err; 10493e67cfadSDmitry Monakhov } 1050393d1d1dSDr. Tilmann Bubeck 105119c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 105219c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 105319c5246dSYongqiang Yang int err = 0, err2 = 0; 10547f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 105519c5246dSYongqiang Yang 105619c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 105719c5246dSYongqiang Yang sizeof(__u64))) { 105819c5246dSYongqiang Yang return -EFAULT; 105919c5246dSYongqiang Yang } 106019c5246dSYongqiang Yang 106119c5246dSYongqiang Yang err = ext4_resize_begin(sb); 106219c5246dSYongqiang Yang if (err) 106319c5246dSYongqiang Yang return err; 106419c5246dSYongqiang Yang 10658cae6f71SAl Viro err = mnt_want_write_file(filp); 106619c5246dSYongqiang Yang if (err) 106719c5246dSYongqiang Yang goto resizefs_out; 106819c5246dSYongqiang Yang 106919c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 107019c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 107119c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 107219c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 107319c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 107419c5246dSYongqiang Yang } 107519c5246dSYongqiang Yang if (err == 0) 107619c5246dSYongqiang Yang err = err2; 10778cae6f71SAl Viro mnt_drop_write_file(filp); 1078310a997fSKirill Tkhai if (!err && (o_group < EXT4_SB(sb)->s_groups_count) && 10797f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 10807f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 10817f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 10827f511862STheodore Ts'o 108319c5246dSYongqiang Yang resizefs_out: 108419c5246dSYongqiang Yang ext4_resize_end(sb); 108519c5246dSYongqiang Yang return err; 108619c5246dSYongqiang Yang } 108719c5246dSYongqiang Yang 1088e681c047SLukas Czerner case FITRIM: 1089e681c047SLukas Czerner { 109041431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 1091e681c047SLukas Czerner struct fstrim_range range; 1092e681c047SLukas Czerner int ret = 0; 1093e681c047SLukas Czerner 1094e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 1095e681c047SLukas Czerner return -EPERM; 1096e681c047SLukas Czerner 109741431792SLukas Czerner if (!blk_queue_discard(q)) 109841431792SLukas Czerner return -EOPNOTSUPP; 109941431792SLukas Czerner 110018915b58SDarrick J. Wong /* 110118915b58SDarrick J. Wong * We haven't replayed the journal, so we cannot use our 110218915b58SDarrick J. Wong * block-bitmap-guided storage zapping commands. 110318915b58SDarrick J. Wong */ 110418915b58SDarrick J. Wong if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) 110518915b58SDarrick J. Wong return -EROFS; 110618915b58SDarrick J. Wong 1107e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 1108e681c047SLukas Czerner sizeof(range))) 1109e681c047SLukas Czerner return -EFAULT; 1110e681c047SLukas Czerner 11115c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 11125c2ed62fSLukas Czerner q->limits.discard_granularity); 1113e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 1114e681c047SLukas Czerner if (ret < 0) 1115e681c047SLukas Czerner return ret; 1116e681c047SLukas Czerner 1117e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 1118e681c047SLukas Czerner sizeof(range))) 1119e681c047SLukas Czerner return -EFAULT; 1120e681c047SLukas Czerner 1121e681c047SLukas Czerner return 0; 1122e681c047SLukas Czerner } 11237869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 11247869a4a6STheodore Ts'o return ext4_ext_precache(inode); 1125e681c047SLukas Czerner 1126db717d8eSEric Biggers case EXT4_IOC_SET_ENCRYPTION_POLICY: 11279a200d07SRichard Weinberger if (!ext4_has_feature_encrypt(sb)) 11289a200d07SRichard Weinberger return -EOPNOTSUPP; 1129db717d8eSEric Biggers return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); 11309a200d07SRichard Weinberger 11319bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: { 1132643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 11339bd8212fSMichael Halcrow int err, err2; 11349bd8212fSMichael Halcrow struct ext4_sb_info *sbi = EXT4_SB(sb); 11359bd8212fSMichael Halcrow handle_t *handle; 11369bd8212fSMichael Halcrow 113735997d1cSEric Biggers if (!ext4_has_feature_encrypt(sb)) 11389bd8212fSMichael Halcrow return -EOPNOTSUPP; 11399bd8212fSMichael Halcrow if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { 11409bd8212fSMichael Halcrow err = mnt_want_write_file(filp); 11419bd8212fSMichael Halcrow if (err) 11429bd8212fSMichael Halcrow return err; 11439bd8212fSMichael Halcrow handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 11449bd8212fSMichael Halcrow if (IS_ERR(handle)) { 11459bd8212fSMichael Halcrow err = PTR_ERR(handle); 11469bd8212fSMichael Halcrow goto pwsalt_err_exit; 11479bd8212fSMichael Halcrow } 11489bd8212fSMichael Halcrow err = ext4_journal_get_write_access(handle, sbi->s_sbh); 11499bd8212fSMichael Halcrow if (err) 11509bd8212fSMichael Halcrow goto pwsalt_err_journal; 11519bd8212fSMichael Halcrow generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); 11529bd8212fSMichael Halcrow err = ext4_handle_dirty_metadata(handle, NULL, 11539bd8212fSMichael Halcrow sbi->s_sbh); 11549bd8212fSMichael Halcrow pwsalt_err_journal: 11559bd8212fSMichael Halcrow err2 = ext4_journal_stop(handle); 11569bd8212fSMichael Halcrow if (err2 && !err) 11579bd8212fSMichael Halcrow err = err2; 11589bd8212fSMichael Halcrow pwsalt_err_exit: 11599bd8212fSMichael Halcrow mnt_drop_write_file(filp); 11609bd8212fSMichael Halcrow if (err) 11619bd8212fSMichael Halcrow return err; 11629bd8212fSMichael Halcrow } 1163b4ab9e29SFabian Frederick if (copy_to_user((void __user *) arg, 1164b4ab9e29SFabian Frederick sbi->s_es->s_encrypt_pw_salt, 16)) 11659bd8212fSMichael Halcrow return -EFAULT; 11669bd8212fSMichael Halcrow return 0; 1167ba679017SEric Biggers #else 1168ba679017SEric Biggers return -EOPNOTSUPP; 1169ba679017SEric Biggers #endif 11709bd8212fSMichael Halcrow } 1171db717d8eSEric Biggers case EXT4_IOC_GET_ENCRYPTION_POLICY: 11720642ea24SChao Yu if (!ext4_has_feature_encrypt(sb)) 11730642ea24SChao Yu return -EOPNOTSUPP; 1174db717d8eSEric Biggers return fscrypt_ioctl_get_policy(filp, (void __user *)arg); 11759bd8212fSMichael Halcrow 117629b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY_EX: 117729b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 117829b3692eSEric Biggers return -EOPNOTSUPP; 117929b3692eSEric Biggers return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg); 118029b3692eSEric Biggers 118129b3692eSEric Biggers case FS_IOC_ADD_ENCRYPTION_KEY: 118229b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 118329b3692eSEric Biggers return -EOPNOTSUPP; 118429b3692eSEric Biggers return fscrypt_ioctl_add_key(filp, (void __user *)arg); 118529b3692eSEric Biggers 118629b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY: 118729b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 118829b3692eSEric Biggers return -EOPNOTSUPP; 118929b3692eSEric Biggers return fscrypt_ioctl_remove_key(filp, (void __user *)arg); 119029b3692eSEric Biggers 119129b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 119229b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 119329b3692eSEric Biggers return -EOPNOTSUPP; 119429b3692eSEric Biggers return fscrypt_ioctl_remove_key_all_users(filp, 119529b3692eSEric Biggers (void __user *)arg); 119629b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 119729b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 119829b3692eSEric Biggers return -EOPNOTSUPP; 119929b3692eSEric Biggers return fscrypt_ioctl_get_key_status(filp, (void __user *)arg); 120029b3692eSEric Biggers 12017ec9f3b4SEric Biggers case FS_IOC_GET_ENCRYPTION_NONCE: 12027ec9f3b4SEric Biggers if (!ext4_has_feature_encrypt(sb)) 12037ec9f3b4SEric Biggers return -EOPNOTSUPP; 12047ec9f3b4SEric Biggers return fscrypt_ioctl_get_nonce(filp, (void __user *)arg); 12057ec9f3b4SEric Biggers 1206b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 1207b0c013e2STheodore Ts'o { 1208b0c013e2STheodore Ts'o if (!inode_owner_or_capable(inode)) 1209b0c013e2STheodore Ts'o return -EACCES; 1210b0c013e2STheodore Ts'o ext4_clear_inode_es(inode); 1211b0c013e2STheodore Ts'o return 0; 1212b0c013e2STheodore Ts'o } 1213b0c013e2STheodore Ts'o 12141ad3ea6eSTheodore Ts'o case EXT4_IOC_GETSTATE: 12151ad3ea6eSTheodore Ts'o { 12161ad3ea6eSTheodore Ts'o __u32 state = 0; 12171ad3ea6eSTheodore Ts'o 12181ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED)) 12191ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_EXT_PRECACHED; 12201ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_NEW)) 12211ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_NEW; 12221ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY)) 12231ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_NEWENTRY; 12241ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) 12251ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE; 12261ad3ea6eSTheodore Ts'o 12271ad3ea6eSTheodore Ts'o return put_user(state, (__u32 __user *) arg); 12281ad3ea6eSTheodore Ts'o } 12291ad3ea6eSTheodore Ts'o 1230bb5835edSTheodore Ts'o case EXT4_IOC_GET_ES_CACHE: 1231bb5835edSTheodore Ts'o return ext4_ioctl_get_es_cache(filp, arg); 1232bb5835edSTheodore Ts'o 12339b7365fcSLi Xi case EXT4_IOC_FSGETXATTR: 12349b7365fcSLi Xi { 12359b7365fcSLi Xi struct fsxattr fa; 12369b7365fcSLi Xi 12377b0e492eSDarrick J. Wong ext4_fill_fsxattr(inode, &fa); 12389b7365fcSLi Xi 12399b7365fcSLi Xi if (copy_to_user((struct fsxattr __user *)arg, 12409b7365fcSLi Xi &fa, sizeof(fa))) 12419b7365fcSLi Xi return -EFAULT; 12429b7365fcSLi Xi return 0; 12439b7365fcSLi Xi } 12449b7365fcSLi Xi case EXT4_IOC_FSSETXATTR: 12459b7365fcSLi Xi { 12467b0e492eSDarrick J. Wong struct fsxattr fa, old_fa; 12479b7365fcSLi Xi int err; 12489b7365fcSLi Xi 12499b7365fcSLi Xi if (copy_from_user(&fa, (struct fsxattr __user *)arg, 12509b7365fcSLi Xi sizeof(fa))) 12519b7365fcSLi Xi return -EFAULT; 12529b7365fcSLi Xi 12539b7365fcSLi Xi /* Make sure caller has proper permission */ 12549b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 12559b7365fcSLi Xi return -EACCES; 12569b7365fcSLi Xi 1257d14e7683SJan Kara if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) 1258d14e7683SJan Kara return -EOPNOTSUPP; 1259d14e7683SJan Kara 1260d14e7683SJan Kara flags = ext4_xflags_to_iflags(fa.fsx_xflags); 1261d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 1262d14e7683SJan Kara return -EOPNOTSUPP; 1263d14e7683SJan Kara 12649b7365fcSLi Xi err = mnt_want_write_file(filp); 12659b7365fcSLi Xi if (err) 12669b7365fcSLi Xi return err; 12679b7365fcSLi Xi 12685955102cSAl Viro inode_lock(inode); 12697b0e492eSDarrick J. Wong ext4_fill_fsxattr(inode, &old_fa); 12707b0e492eSDarrick J. Wong err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa); 1271dc7ac6c4SWang Shilong if (err) 1272dc7ac6c4SWang Shilong goto out; 12739b7365fcSLi Xi flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | 12749b7365fcSLi Xi (flags & EXT4_FL_XFLAG_VISIBLE); 12752e538403SDarrick J. Wong err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags); 12762e538403SDarrick J. Wong if (err) 12772e538403SDarrick J. Wong goto out; 12789b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 1279dc7ac6c4SWang Shilong if (err) 1280dc7ac6c4SWang Shilong goto out; 1281dc7ac6c4SWang Shilong err = ext4_ioctl_setproject(filp, fa.fsx_projid); 1282dc7ac6c4SWang Shilong out: 12835955102cSAl Viro inode_unlock(inode); 12849b7365fcSLi Xi mnt_drop_write_file(filp); 12859b7365fcSLi Xi return err; 12869b7365fcSLi Xi } 1287e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 1288e9be2ac7STheodore Ts'o return ext4_shutdown(sb, arg); 1289c93d8f88SEric Biggers 1290c93d8f88SEric Biggers case FS_IOC_ENABLE_VERITY: 1291c93d8f88SEric Biggers if (!ext4_has_feature_verity(sb)) 1292c93d8f88SEric Biggers return -EOPNOTSUPP; 1293c93d8f88SEric Biggers return fsverity_ioctl_enable(filp, (const void __user *)arg); 1294c93d8f88SEric Biggers 1295c93d8f88SEric Biggers case FS_IOC_MEASURE_VERITY: 1296c93d8f88SEric Biggers if (!ext4_has_feature_verity(sb)) 1297c93d8f88SEric Biggers return -EOPNOTSUPP; 1298c93d8f88SEric Biggers return fsverity_ioctl_measure(filp, (void __user *)arg); 1299c93d8f88SEric Biggers 1300ac27a0ecSDave Kleikamp default: 1301ac27a0ecSDave Kleikamp return -ENOTTY; 1302ac27a0ecSDave Kleikamp } 1303ac27a0ecSDave Kleikamp } 1304ac27a0ecSDave Kleikamp 1305ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 1306617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1307ac27a0ecSDave Kleikamp { 1308ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 1309ac27a0ecSDave Kleikamp switch (cmd) { 1310617ba13bSMingming Cao case EXT4_IOC32_GETFLAGS: 1311617ba13bSMingming Cao cmd = EXT4_IOC_GETFLAGS; 1312ac27a0ecSDave Kleikamp break; 1313617ba13bSMingming Cao case EXT4_IOC32_SETFLAGS: 1314617ba13bSMingming Cao cmd = EXT4_IOC_SETFLAGS; 1315ac27a0ecSDave Kleikamp break; 1316617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 1317617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 1318ac27a0ecSDave Kleikamp break; 1319617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 1320617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 1321ac27a0ecSDave Kleikamp break; 1322617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 1323617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 1324ac27a0ecSDave Kleikamp break; 1325617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 1326617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 1327ac27a0ecSDave Kleikamp break; 1328617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 1329617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 1330ac27a0ecSDave Kleikamp break; 1331617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 1332617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 1333ac27a0ecSDave Kleikamp break; 1334617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 1335617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 1336ac27a0ecSDave Kleikamp break; 13374d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 13384d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 1339e145b35bSAl Viro struct ext4_new_group_data input; 13404d92dc0fSBen Hutchings int err; 13414d92dc0fSBen Hutchings 13424d92dc0fSBen Hutchings uinput = compat_ptr(arg); 13434d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 13444d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 13454d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 13464d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 13474d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 13484d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 13494d92dc0fSBen Hutchings &uinput->reserved_blocks); 13504d92dc0fSBen Hutchings if (err) 13514d92dc0fSBen Hutchings return -EFAULT; 1352e145b35bSAl Viro return ext4_ioctl_group_add(file, &input); 13534d92dc0fSBen Hutchings } 1354b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 135519c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 1356314999dcSArnd Bergmann case FITRIM: 13577869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 13589bd8212fSMichael Halcrow case EXT4_IOC_SET_ENCRYPTION_POLICY: 13599bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_PWSALT: 13609bd8212fSMichael Halcrow case EXT4_IOC_GET_ENCRYPTION_POLICY: 136129b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY_EX: 136229b3692eSEric Biggers case FS_IOC_ADD_ENCRYPTION_KEY: 136329b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY: 136429b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 136529b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 13667ec9f3b4SEric Biggers case FS_IOC_GET_ENCRYPTION_NONCE: 1367e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 13680c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 1369c93d8f88SEric Biggers case FS_IOC_ENABLE_VERITY: 1370c93d8f88SEric Biggers case FS_IOC_MEASURE_VERITY: 1371b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 13721ad3ea6eSTheodore Ts'o case EXT4_IOC_GETSTATE: 1373bb5835edSTheodore Ts'o case EXT4_IOC_GET_ES_CACHE: 1374a54d8d34SMartijn Coenen case EXT4_IOC_FSGETXATTR: 1375a54d8d34SMartijn Coenen case EXT4_IOC_FSSETXATTR: 1376b684b2eeSChristian Borntraeger break; 1377ac27a0ecSDave Kleikamp default: 1378ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 1379ac27a0ecSDave Kleikamp } 13805cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 1381ac27a0ecSDave Kleikamp } 1382ac27a0ecSDave Kleikamp #endif 1383