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 } 168aa75f4d3SHarshad Shirwadkar ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT); 169393d1d1dSDr. Tilmann Bubeck 170393d1d1dSDr. Tilmann Bubeck /* Protect extent tree against block allocations via delalloc */ 171393d1d1dSDr. Tilmann Bubeck ext4_double_down_write_data_sem(inode, inode_bl); 172393d1d1dSDr. Tilmann Bubeck 173393d1d1dSDr. Tilmann Bubeck if (inode_bl->i_nlink == 0) { 174393d1d1dSDr. Tilmann Bubeck /* this inode has never been used as a BOOT_LOADER */ 175393d1d1dSDr. Tilmann Bubeck set_nlink(inode_bl, 1); 176393d1d1dSDr. Tilmann Bubeck i_uid_write(inode_bl, 0); 177393d1d1dSDr. Tilmann Bubeck i_gid_write(inode_bl, 0); 178393d1d1dSDr. Tilmann Bubeck inode_bl->i_flags = 0; 179393d1d1dSDr. Tilmann Bubeck ei_bl->i_flags = 0; 180ee73f9a5SJeff Layton inode_set_iversion(inode_bl, 1); 181393d1d1dSDr. Tilmann Bubeck i_size_write(inode_bl, 0); 182393d1d1dSDr. Tilmann Bubeck inode_bl->i_mode = S_IFREG; 183e2b911c5SDarrick J. Wong if (ext4_has_feature_extents(sb)) { 184393d1d1dSDr. Tilmann Bubeck ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 185393d1d1dSDr. Tilmann Bubeck ext4_ext_tree_init(handle, inode_bl); 186393d1d1dSDr. Tilmann Bubeck } else 187393d1d1dSDr. Tilmann Bubeck memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 188393d1d1dSDr. Tilmann Bubeck } 189393d1d1dSDr. Tilmann Bubeck 190aa507b5fSyangerkun err = dquot_initialize(inode); 191aa507b5fSyangerkun if (err) 192aa507b5fSyangerkun goto err_out1; 193aa507b5fSyangerkun 194aa507b5fSyangerkun size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes; 195aa507b5fSyangerkun size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes; 196aa507b5fSyangerkun diff = size - size_bl; 197393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 198393d1d1dSDr. Tilmann Bubeck 199eeca7ea1SDeepa Dinamani inode->i_ctime = inode_bl->i_ctime = current_time(inode); 200393d1d1dSDr. Tilmann Bubeck 20123253068STheodore Ts'o inode->i_generation = prandom_u32(); 20223253068STheodore Ts'o inode_bl->i_generation = prandom_u32(); 20318aded17STheodore Ts'o reset_inode_seed(inode); 20418aded17STheodore Ts'o reset_inode_seed(inode_bl); 205393d1d1dSDr. Tilmann Bubeck 20627bc446eSbrookxu ext4_discard_preallocations(inode, 0); 207393d1d1dSDr. Tilmann Bubeck 208393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode); 209393d1d1dSDr. Tilmann Bubeck if (err < 0) { 210aa507b5fSyangerkun /* No need to update quota information. */ 211393d1d1dSDr. Tilmann Bubeck ext4_warning(inode->i_sb, 212393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 213393d1d1dSDr. Tilmann Bubeck inode->i_ino, err); 214393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 215393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 21618aded17STheodore Ts'o ext4_mark_inode_dirty(handle, inode); 217aa507b5fSyangerkun goto err_out1; 218aa507b5fSyangerkun } 219aa507b5fSyangerkun 220aa507b5fSyangerkun blocks = inode_bl->i_blocks; 221aa507b5fSyangerkun bytes = inode_bl->i_bytes; 222aa507b5fSyangerkun inode_bl->i_blocks = inode->i_blocks; 223aa507b5fSyangerkun inode_bl->i_bytes = inode->i_bytes; 224393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode_bl); 225393d1d1dSDr. Tilmann Bubeck if (err < 0) { 226aa507b5fSyangerkun /* No need to update quota information. */ 227393d1d1dSDr. Tilmann Bubeck ext4_warning(inode_bl->i_sb, 228393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 229393d1d1dSDr. Tilmann Bubeck inode_bl->i_ino, err); 230aa507b5fSyangerkun goto revert; 231aa507b5fSyangerkun } 232aa507b5fSyangerkun 233aa507b5fSyangerkun /* Bootloader inode should not be counted into quota information. */ 234aa507b5fSyangerkun if (diff > 0) 235aa507b5fSyangerkun dquot_free_space(inode, diff); 236aa507b5fSyangerkun else 237aa507b5fSyangerkun err = dquot_alloc_space(inode, -1 * diff); 238aa507b5fSyangerkun 239aa507b5fSyangerkun if (err < 0) { 240aa507b5fSyangerkun revert: 241393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 242aa507b5fSyangerkun inode_bl->i_blocks = blocks; 243aa507b5fSyangerkun inode_bl->i_bytes = bytes; 244393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 245393d1d1dSDr. Tilmann Bubeck ext4_mark_inode_dirty(handle, inode); 24618aded17STheodore Ts'o ext4_mark_inode_dirty(handle, inode_bl); 247393d1d1dSDr. Tilmann Bubeck } 248aa507b5fSyangerkun 249aa507b5fSyangerkun err_out1: 250393d1d1dSDr. Tilmann Bubeck ext4_journal_stop(handle); 251aa75f4d3SHarshad Shirwadkar ext4_fc_stop_ineligible(sb); 252393d1d1dSDr. Tilmann Bubeck ext4_double_up_write_data_sem(inode, inode_bl); 253393d1d1dSDr. Tilmann Bubeck 254a46c68a3Syangerkun err_out: 255a46c68a3Syangerkun up_write(&EXT4_I(inode)->i_mmap_sem); 25630d29b11SZheng Liu journal_err_out: 257375e289eSJ. Bruce Fields unlock_two_nondirectories(inode, inode_bl); 258393d1d1dSDr. Tilmann Bubeck iput(inode_bl); 259393d1d1dSDr. Tilmann Bubeck return err; 260393d1d1dSDr. Tilmann Bubeck } 261393d1d1dSDr. Tilmann Bubeck 262643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 2639bd8212fSMichael Halcrow static int uuid_is_zero(__u8 u[16]) 2649bd8212fSMichael Halcrow { 2659bd8212fSMichael Halcrow int i; 2669bd8212fSMichael Halcrow 2679bd8212fSMichael Halcrow for (i = 0; i < 16; i++) 2689bd8212fSMichael Halcrow if (u[i]) 2699bd8212fSMichael Halcrow return 0; 2709bd8212fSMichael Halcrow return 1; 2719bd8212fSMichael Halcrow } 272ba679017SEric Biggers #endif 2739bd8212fSMichael Halcrow 2742e538403SDarrick J. Wong /* 2752e538403SDarrick J. Wong * If immutable is set and we are not clearing it, we're not allowed to change 2762e538403SDarrick J. Wong * anything else in the inode. Don't error out if we're only trying to set 2772e538403SDarrick J. Wong * immutable on an immutable file. 2782e538403SDarrick J. Wong */ 2792e538403SDarrick J. Wong static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid, 2802e538403SDarrick J. Wong unsigned int flags) 2812e538403SDarrick J. Wong { 2822e538403SDarrick J. Wong struct ext4_inode_info *ei = EXT4_I(inode); 2832e538403SDarrick J. Wong unsigned int oldflags = ei->i_flags; 2842e538403SDarrick J. Wong 2852e538403SDarrick J. Wong if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL)) 2862e538403SDarrick J. Wong return 0; 2872e538403SDarrick J. Wong 2882e538403SDarrick J. Wong if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL)) 2892e538403SDarrick J. Wong return -EPERM; 2902e538403SDarrick J. Wong if (ext4_has_feature_project(inode->i_sb) && 2912e538403SDarrick J. Wong __kprojid_val(ei->i_projid) != new_projid) 2922e538403SDarrick J. Wong return -EPERM; 2932e538403SDarrick J. Wong 2942e538403SDarrick J. Wong return 0; 2952e538403SDarrick J. Wong } 2962e538403SDarrick J. Wong 297b383a73fSIra Weiny static void ext4_dax_dontcache(struct inode *inode, unsigned int flags) 298b383a73fSIra Weiny { 299b383a73fSIra Weiny struct ext4_inode_info *ei = EXT4_I(inode); 300b383a73fSIra Weiny 301b383a73fSIra Weiny if (S_ISDIR(inode->i_mode)) 302b383a73fSIra Weiny return; 303b383a73fSIra Weiny 304b383a73fSIra Weiny if (test_opt2(inode->i_sb, DAX_NEVER) || 305b383a73fSIra Weiny test_opt(inode->i_sb, DAX_ALWAYS)) 306b383a73fSIra Weiny return; 307b383a73fSIra Weiny 308b383a73fSIra Weiny if ((ei->i_flags ^ flags) & EXT4_DAX_FL) 309b383a73fSIra Weiny d_mark_dontcache(inode); 310b383a73fSIra Weiny } 311b383a73fSIra Weiny 312b383a73fSIra Weiny static bool dax_compatible(struct inode *inode, unsigned int oldflags, 313b383a73fSIra Weiny unsigned int flags) 314b383a73fSIra Weiny { 315b383a73fSIra Weiny if (flags & EXT4_DAX_FL) { 316b383a73fSIra Weiny if ((oldflags & EXT4_DAX_MUT_EXCL) || 317b383a73fSIra Weiny ext4_test_inode_state(inode, 318b383a73fSIra Weiny EXT4_STATE_VERITY_IN_PROGRESS)) { 319b383a73fSIra Weiny return false; 320b383a73fSIra Weiny } 321b383a73fSIra Weiny } 322b383a73fSIra Weiny 323b383a73fSIra Weiny if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL)) 324b383a73fSIra Weiny return false; 325b383a73fSIra Weiny 326b383a73fSIra Weiny return true; 327b383a73fSIra Weiny } 328b383a73fSIra Weiny 3299b7365fcSLi Xi static int ext4_ioctl_setflags(struct inode *inode, 3309b7365fcSLi Xi unsigned int flags) 331ac27a0ecSDave Kleikamp { 332617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 333ac27a0ecSDave Kleikamp handle_t *handle = NULL; 334fdde368eSAnton Protopopov int err = -EPERM, migrate = 0; 335617ba13bSMingming Cao struct ext4_iloc iloc; 33679906964STheodore Ts'o unsigned int oldflags, mask, i; 337b886ee3eSGabriel Krisman Bertazi struct super_block *sb = inode->i_sb; 338ac27a0ecSDave Kleikamp 339e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 34002749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 34142a74f20SDave Hansen goto flags_out; 34242a74f20SDave Hansen 343ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 344ac27a0ecSDave Kleikamp 3455aca2842SDarrick J. Wong err = vfs_ioc_setflags_prepare(inode, oldflags, flags); 3465aca2842SDarrick J. Wong if (err) 34742a74f20SDave Hansen goto flags_out; 348ac27a0ecSDave Kleikamp 349ac27a0ecSDave Kleikamp /* 350ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 351ac27a0ecSDave Kleikamp * the relevant capability. 352ac27a0ecSDave Kleikamp */ 353fcebc794SIra Weiny if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 35442a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 35542a74f20SDave Hansen goto flags_out; 356ac27a0ecSDave Kleikamp } 357b383a73fSIra Weiny 358b383a73fSIra Weiny if (!dax_compatible(inode, oldflags, flags)) { 359b383a73fSIra Weiny err = -EOPNOTSUPP; 360b383a73fSIra Weiny goto flags_out; 361b383a73fSIra Weiny } 362b383a73fSIra Weiny 363996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 3644db46fc2SAneesh Kumar K.V migrate = 1; 365ac27a0ecSDave Kleikamp 366b886ee3eSGabriel Krisman Bertazi if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) { 367b886ee3eSGabriel Krisman Bertazi if (!ext4_has_feature_casefold(sb)) { 368b886ee3eSGabriel Krisman Bertazi err = -EOPNOTSUPP; 369b886ee3eSGabriel Krisman Bertazi goto flags_out; 370b886ee3eSGabriel Krisman Bertazi } 371b886ee3eSGabriel Krisman Bertazi 372b886ee3eSGabriel Krisman Bertazi if (!S_ISDIR(inode->i_mode)) { 373b886ee3eSGabriel Krisman Bertazi err = -ENOTDIR; 374b886ee3eSGabriel Krisman Bertazi goto flags_out; 375b886ee3eSGabriel Krisman Bertazi } 376b886ee3eSGabriel Krisman Bertazi 377b886ee3eSGabriel Krisman Bertazi if (!ext4_empty_dir(inode)) { 378b886ee3eSGabriel Krisman Bertazi err = -ENOTEMPTY; 379b886ee3eSGabriel Krisman Bertazi goto flags_out; 380b886ee3eSGabriel Krisman Bertazi } 381b886ee3eSGabriel Krisman Bertazi } 382b886ee3eSGabriel Krisman Bertazi 3832e538403SDarrick J. Wong /* 3842e538403SDarrick J. Wong * Wait for all pending directio and then flush all the dirty pages 3852e538403SDarrick J. Wong * for this file. The flush marks all the pages readonly, so any 3862e538403SDarrick J. Wong * subsequent attempt to write to the file (particularly mmap pages) 3872e538403SDarrick J. Wong * will come through the filesystem and fail. 3882e538403SDarrick J. Wong */ 3892e538403SDarrick J. Wong if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) && 3902e538403SDarrick J. Wong (flags & EXT4_IMMUTABLE_FL)) { 3912e538403SDarrick J. Wong inode_dio_wait(inode); 3922e538403SDarrick J. Wong err = filemap_write_and_wait(inode->i_mapping); 3932e538403SDarrick J. Wong if (err) 3942e538403SDarrick J. Wong goto flags_out; 3952e538403SDarrick J. Wong } 3962e538403SDarrick J. Wong 3979924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 398ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 39942a74f20SDave Hansen err = PTR_ERR(handle); 40042a74f20SDave Hansen goto flags_out; 401ac27a0ecSDave Kleikamp } 402ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 4030390131bSFrank Mayhar ext4_handle_sync(handle); 404617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 405ac27a0ecSDave Kleikamp if (err) 406ac27a0ecSDave Kleikamp goto flags_err; 407ac27a0ecSDave Kleikamp 408b383a73fSIra Weiny ext4_dax_dontcache(inode, flags); 409b383a73fSIra Weiny 41079906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 41179906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 41279906964STheodore Ts'o continue; 413f8011d93SJan Kara /* These flags get special treatment later */ 414f8011d93SJan Kara if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) 415f8011d93SJan Kara continue; 41679906964STheodore Ts'o if (mask & flags) 41779906964STheodore Ts'o ext4_set_inode_flag(inode, i); 41879906964STheodore Ts'o else 41979906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 42079906964STheodore Ts'o } 421ac27a0ecSDave Kleikamp 422043546e4SIra Weiny ext4_set_inode_flags(inode, false); 423043546e4SIra Weiny 424eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 425ac27a0ecSDave Kleikamp 426617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 427ac27a0ecSDave Kleikamp flags_err: 428617ba13bSMingming Cao ext4_journal_stop(handle); 42942a74f20SDave Hansen if (err) 43042a74f20SDave Hansen goto flags_out; 431ac27a0ecSDave Kleikamp 432fcebc794SIra Weiny if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 433e9072d85SRoss Zwisler /* 434e9072d85SRoss Zwisler * Changes to the journaling mode can cause unsafe changes to 435ff694ab6SIra Weiny * S_DAX if the inode is DAX 436e9072d85SRoss Zwisler */ 437ff694ab6SIra Weiny if (IS_DAX(inode)) { 438e9072d85SRoss Zwisler err = -EBUSY; 439e9072d85SRoss Zwisler goto flags_out; 440e9072d85SRoss Zwisler } 441e9072d85SRoss Zwisler 442fcebc794SIra Weiny err = ext4_change_inode_journal_flag(inode, 443fcebc794SIra Weiny flags & EXT4_JOURNAL_DATA_FL); 4444db46fc2SAneesh Kumar K.V if (err) 4454db46fc2SAneesh Kumar K.V goto flags_out; 446e9072d85SRoss Zwisler } 447996bb9fdSTheodore Ts'o if (migrate) { 448996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 4494db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 450996bb9fdSTheodore Ts'o else 451996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 452996bb9fdSTheodore Ts'o } 453996bb9fdSTheodore Ts'o 45442a74f20SDave Hansen flags_out: 4559b7365fcSLi Xi return err; 4569b7365fcSLi Xi } 4579b7365fcSLi Xi 4589b7365fcSLi Xi #ifdef CONFIG_QUOTA 4599b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 4609b7365fcSLi Xi { 4619b7365fcSLi Xi struct inode *inode = file_inode(filp); 4629b7365fcSLi Xi struct super_block *sb = inode->i_sb; 4639b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 4649b7365fcSLi Xi int err, rc; 4659b7365fcSLi Xi handle_t *handle; 4669b7365fcSLi Xi kprojid_t kprojid; 4679b7365fcSLi Xi struct ext4_iloc iloc; 4689b7365fcSLi Xi struct ext4_inode *raw_inode; 469079788d0SWang Shilong struct dquot *transfer_to[MAXQUOTAS] = { }; 4709b7365fcSLi Xi 4710b7b7779SKaho Ng if (!ext4_has_feature_project(sb)) { 4729b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 4739b7365fcSLi Xi return -EOPNOTSUPP; 4749b7365fcSLi Xi else 4759b7365fcSLi Xi return 0; 4769b7365fcSLi Xi } 4779b7365fcSLi Xi 4789b7365fcSLi Xi if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 4799b7365fcSLi Xi return -EOPNOTSUPP; 4809b7365fcSLi Xi 4819b7365fcSLi Xi kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 4829b7365fcSLi Xi 4839b7365fcSLi Xi if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 4849b7365fcSLi Xi return 0; 4859b7365fcSLi Xi 4869b7365fcSLi Xi err = -EPERM; 4879b7365fcSLi Xi /* Is it quota file? Do not allow user to mess with it */ 48802749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 489dc7ac6c4SWang Shilong return err; 4909b7365fcSLi Xi 4919b7365fcSLi Xi err = ext4_get_inode_loc(inode, &iloc); 4929b7365fcSLi Xi if (err) 493dc7ac6c4SWang Shilong return err; 4949b7365fcSLi Xi 4959b7365fcSLi Xi raw_inode = ext4_raw_inode(&iloc); 4969b7365fcSLi Xi if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 497c03b45b8SMiao Xie err = ext4_expand_extra_isize(inode, 498c03b45b8SMiao Xie EXT4_SB(sb)->s_want_extra_isize, 499c03b45b8SMiao Xie &iloc); 500c03b45b8SMiao Xie if (err) 501dc7ac6c4SWang Shilong return err; 502c03b45b8SMiao Xie } else { 5039b7365fcSLi Xi brelse(iloc.bh); 504c03b45b8SMiao Xie } 5059b7365fcSLi Xi 506182a79e0SWang Shilong err = dquot_initialize(inode); 507182a79e0SWang Shilong if (err) 508182a79e0SWang Shilong return err; 5099b7365fcSLi Xi 5109b7365fcSLi Xi handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5119b7365fcSLi Xi EXT4_QUOTA_INIT_BLOCKS(sb) + 5129b7365fcSLi Xi EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 513dc7ac6c4SWang Shilong if (IS_ERR(handle)) 514dc7ac6c4SWang Shilong return PTR_ERR(handle); 5159b7365fcSLi Xi 5169b7365fcSLi Xi err = ext4_reserve_inode_write(handle, inode, &iloc); 5179b7365fcSLi Xi if (err) 5189b7365fcSLi Xi goto out_stop; 5199b7365fcSLi Xi 5209b7365fcSLi Xi transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 521ff0bc084SSeth Forshee if (!IS_ERR(transfer_to[PRJQUOTA])) { 5227a9ca53aSTahsin Erdogan 5237a9ca53aSTahsin Erdogan /* __dquot_transfer() calls back ext4_get_inode_usage() which 5247a9ca53aSTahsin Erdogan * counts xattr inode references. 5257a9ca53aSTahsin Erdogan */ 5267a9ca53aSTahsin Erdogan down_read(&EXT4_I(inode)->xattr_sem); 5279b7365fcSLi Xi err = __dquot_transfer(inode, transfer_to); 5287a9ca53aSTahsin Erdogan up_read(&EXT4_I(inode)->xattr_sem); 5299b7365fcSLi Xi dqput(transfer_to[PRJQUOTA]); 5309b7365fcSLi Xi if (err) 5319b7365fcSLi Xi goto out_dirty; 5329b7365fcSLi Xi } 533079788d0SWang Shilong 5349b7365fcSLi Xi EXT4_I(inode)->i_projid = kprojid; 535eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 5369b7365fcSLi Xi out_dirty: 5379b7365fcSLi Xi rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 5389b7365fcSLi Xi if (!err) 5399b7365fcSLi Xi err = rc; 5409b7365fcSLi Xi out_stop: 5419b7365fcSLi Xi ext4_journal_stop(handle); 5429b7365fcSLi Xi return err; 5439b7365fcSLi Xi } 5449b7365fcSLi Xi #else 5459b7365fcSLi Xi static int ext4_ioctl_setproject(struct file *filp, __u32 projid) 5469b7365fcSLi Xi { 5479b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 5489b7365fcSLi Xi return -EOPNOTSUPP; 5499b7365fcSLi Xi return 0; 5509b7365fcSLi Xi } 5519b7365fcSLi Xi #endif 5529b7365fcSLi Xi 5539b7365fcSLi Xi /* Transfer internal flags to xflags */ 5549b7365fcSLi Xi static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) 5559b7365fcSLi Xi { 5569b7365fcSLi Xi __u32 xflags = 0; 5579b7365fcSLi Xi 5589b7365fcSLi Xi if (iflags & EXT4_SYNC_FL) 5599b7365fcSLi Xi xflags |= FS_XFLAG_SYNC; 5609b7365fcSLi Xi if (iflags & EXT4_IMMUTABLE_FL) 5619b7365fcSLi Xi xflags |= FS_XFLAG_IMMUTABLE; 5629b7365fcSLi Xi if (iflags & EXT4_APPEND_FL) 5639b7365fcSLi Xi xflags |= FS_XFLAG_APPEND; 5649b7365fcSLi Xi if (iflags & EXT4_NODUMP_FL) 5659b7365fcSLi Xi xflags |= FS_XFLAG_NODUMP; 5669b7365fcSLi Xi if (iflags & EXT4_NOATIME_FL) 5679b7365fcSLi Xi xflags |= FS_XFLAG_NOATIME; 5689b7365fcSLi Xi if (iflags & EXT4_PROJINHERIT_FL) 5699b7365fcSLi Xi xflags |= FS_XFLAG_PROJINHERIT; 570b383a73fSIra Weiny if (iflags & EXT4_DAX_FL) 571b383a73fSIra Weiny xflags |= FS_XFLAG_DAX; 5729b7365fcSLi Xi return xflags; 5739b7365fcSLi Xi } 5749b7365fcSLi Xi 575d14e7683SJan Kara #define EXT4_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \ 576d14e7683SJan Kara FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \ 577b383a73fSIra Weiny FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT | \ 578b383a73fSIra Weiny FS_XFLAG_DAX) 579d14e7683SJan Kara 5809b7365fcSLi Xi /* Transfer xflags flags to internal */ 5819b7365fcSLi Xi static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) 5829b7365fcSLi Xi { 5839b7365fcSLi Xi unsigned long iflags = 0; 5849b7365fcSLi Xi 5859b7365fcSLi Xi if (xflags & FS_XFLAG_SYNC) 5869b7365fcSLi Xi iflags |= EXT4_SYNC_FL; 5879b7365fcSLi Xi if (xflags & FS_XFLAG_IMMUTABLE) 5889b7365fcSLi Xi iflags |= EXT4_IMMUTABLE_FL; 5899b7365fcSLi Xi if (xflags & FS_XFLAG_APPEND) 5909b7365fcSLi Xi iflags |= EXT4_APPEND_FL; 5919b7365fcSLi Xi if (xflags & FS_XFLAG_NODUMP) 5929b7365fcSLi Xi iflags |= EXT4_NODUMP_FL; 5939b7365fcSLi Xi if (xflags & FS_XFLAG_NOATIME) 5949b7365fcSLi Xi iflags |= EXT4_NOATIME_FL; 5959b7365fcSLi Xi if (xflags & FS_XFLAG_PROJINHERIT) 5969b7365fcSLi Xi iflags |= EXT4_PROJINHERIT_FL; 597b383a73fSIra Weiny if (xflags & FS_XFLAG_DAX) 598b383a73fSIra Weiny iflags |= EXT4_DAX_FL; 5999b7365fcSLi Xi 6009b7365fcSLi Xi return iflags; 6019b7365fcSLi Xi } 6029b7365fcSLi Xi 6031a20a630SEric Biggers static int ext4_shutdown(struct super_block *sb, unsigned long arg) 604783d9485STheodore Ts'o { 605783d9485STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 606783d9485STheodore Ts'o __u32 flags; 607783d9485STheodore Ts'o 608783d9485STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 609783d9485STheodore Ts'o return -EPERM; 610783d9485STheodore Ts'o 611783d9485STheodore Ts'o if (get_user(flags, (__u32 __user *)arg)) 612783d9485STheodore Ts'o return -EFAULT; 613783d9485STheodore Ts'o 614783d9485STheodore Ts'o if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) 615783d9485STheodore Ts'o return -EINVAL; 616783d9485STheodore Ts'o 617783d9485STheodore Ts'o if (ext4_forced_shutdown(sbi)) 618783d9485STheodore Ts'o return 0; 619783d9485STheodore Ts'o 620783d9485STheodore Ts'o ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); 621ccf0f32aSTheodore Ts'o trace_ext4_shutdown(sb, flags); 622783d9485STheodore Ts'o 623783d9485STheodore Ts'o switch (flags) { 624783d9485STheodore Ts'o case EXT4_GOING_FLAGS_DEFAULT: 625783d9485STheodore Ts'o freeze_bdev(sb->s_bdev); 626783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 627783d9485STheodore Ts'o thaw_bdev(sb->s_bdev, sb); 628783d9485STheodore Ts'o break; 629783d9485STheodore Ts'o case EXT4_GOING_FLAGS_LOGFLUSH: 630783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 631783d9485STheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { 632783d9485STheodore Ts'o (void) ext4_force_commit(sb); 633fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 634783d9485STheodore Ts'o } 635783d9485STheodore Ts'o break; 636783d9485STheodore Ts'o case EXT4_GOING_FLAGS_NOLOGFLUSH: 637783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 638a6d9946bSTheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) 639fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 640783d9485STheodore Ts'o break; 641783d9485STheodore Ts'o default: 642783d9485STheodore Ts'o return -EINVAL; 643783d9485STheodore Ts'o } 644783d9485STheodore Ts'o clear_opt(sb, DISCARD); 645783d9485STheodore Ts'o return 0; 646783d9485STheodore Ts'o } 647783d9485STheodore Ts'o 6480c9ec4beSDarrick J. Wong struct getfsmap_info { 6490c9ec4beSDarrick J. Wong struct super_block *gi_sb; 6500c9ec4beSDarrick J. Wong struct fsmap_head __user *gi_data; 6510c9ec4beSDarrick J. Wong unsigned int gi_idx; 6520c9ec4beSDarrick J. Wong __u32 gi_last_flags; 6530c9ec4beSDarrick J. Wong }; 6540c9ec4beSDarrick J. Wong 6550c9ec4beSDarrick J. Wong static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) 6560c9ec4beSDarrick J. Wong { 6570c9ec4beSDarrick J. Wong struct getfsmap_info *info = priv; 6580c9ec4beSDarrick J. Wong struct fsmap fm; 6590c9ec4beSDarrick J. Wong 6600c9ec4beSDarrick J. Wong trace_ext4_getfsmap_mapping(info->gi_sb, xfm); 6610c9ec4beSDarrick J. Wong 6620c9ec4beSDarrick J. Wong info->gi_last_flags = xfm->fmr_flags; 6630c9ec4beSDarrick J. Wong ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); 6640c9ec4beSDarrick J. Wong if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, 6650c9ec4beSDarrick J. Wong sizeof(struct fsmap))) 6660c9ec4beSDarrick J. Wong return -EFAULT; 6670c9ec4beSDarrick J. Wong 6680c9ec4beSDarrick J. Wong return 0; 6690c9ec4beSDarrick J. Wong } 6700c9ec4beSDarrick J. Wong 6710c9ec4beSDarrick J. Wong static int ext4_ioc_getfsmap(struct super_block *sb, 6720c9ec4beSDarrick J. Wong struct fsmap_head __user *arg) 6730c9ec4beSDarrick J. Wong { 6740ba33facSTheodore Ts'o struct getfsmap_info info = { NULL }; 6750c9ec4beSDarrick J. Wong struct ext4_fsmap_head xhead = {0}; 6760c9ec4beSDarrick J. Wong struct fsmap_head head; 6770c9ec4beSDarrick J. Wong bool aborted = false; 6780c9ec4beSDarrick J. Wong int error; 6790c9ec4beSDarrick J. Wong 6800c9ec4beSDarrick J. Wong if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 6810c9ec4beSDarrick J. Wong return -EFAULT; 6820c9ec4beSDarrick J. Wong if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 6830c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 6840c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[0].fmr_reserved)) || 6850c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 6860c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[1].fmr_reserved))) 6870c9ec4beSDarrick J. Wong return -EINVAL; 6880c9ec4beSDarrick J. Wong /* 6890c9ec4beSDarrick J. Wong * ext4 doesn't report file extents at all, so the only valid 6900c9ec4beSDarrick J. Wong * file offsets are the magic ones (all zeroes or all ones). 6910c9ec4beSDarrick J. Wong */ 6920c9ec4beSDarrick J. Wong if (head.fmh_keys[0].fmr_offset || 6930c9ec4beSDarrick J. Wong (head.fmh_keys[1].fmr_offset != 0 && 6940c9ec4beSDarrick J. Wong head.fmh_keys[1].fmr_offset != -1ULL)) 6950c9ec4beSDarrick J. Wong return -EINVAL; 6960c9ec4beSDarrick J. Wong 6970c9ec4beSDarrick J. Wong xhead.fmh_iflags = head.fmh_iflags; 6980c9ec4beSDarrick J. Wong xhead.fmh_count = head.fmh_count; 6990c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); 7000c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); 7010c9ec4beSDarrick J. Wong 7020c9ec4beSDarrick J. Wong trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); 7030c9ec4beSDarrick J. Wong trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); 7040c9ec4beSDarrick J. Wong 7050c9ec4beSDarrick J. Wong info.gi_sb = sb; 7060c9ec4beSDarrick J. Wong info.gi_data = arg; 7070c9ec4beSDarrick J. Wong error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); 7080c9ec4beSDarrick J. Wong if (error == EXT4_QUERY_RANGE_ABORT) { 7090c9ec4beSDarrick J. Wong error = 0; 7100c9ec4beSDarrick J. Wong aborted = true; 7110c9ec4beSDarrick J. Wong } else if (error) 7120c9ec4beSDarrick J. Wong return error; 7130c9ec4beSDarrick J. Wong 7140c9ec4beSDarrick J. Wong /* If we didn't abort, set the "last" flag in the last fmx */ 7150c9ec4beSDarrick J. Wong if (!aborted && info.gi_idx) { 7160c9ec4beSDarrick J. Wong info.gi_last_flags |= FMR_OF_LAST; 7170c9ec4beSDarrick J. Wong if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, 7180c9ec4beSDarrick J. Wong &info.gi_last_flags, 7190c9ec4beSDarrick J. Wong sizeof(info.gi_last_flags))) 7200c9ec4beSDarrick J. Wong return -EFAULT; 7210c9ec4beSDarrick J. Wong } 7220c9ec4beSDarrick J. Wong 7230c9ec4beSDarrick J. Wong /* copy back header */ 7240c9ec4beSDarrick J. Wong head.fmh_entries = xhead.fmh_entries; 7250c9ec4beSDarrick J. Wong head.fmh_oflags = xhead.fmh_oflags; 7260c9ec4beSDarrick J. Wong if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 7270c9ec4beSDarrick J. Wong return -EFAULT; 7280c9ec4beSDarrick J. Wong 7290c9ec4beSDarrick J. Wong return 0; 7300c9ec4beSDarrick J. Wong } 7310c9ec4beSDarrick J. Wong 732e145b35bSAl Viro static long ext4_ioctl_group_add(struct file *file, 733e145b35bSAl Viro struct ext4_new_group_data *input) 734e145b35bSAl Viro { 735e145b35bSAl Viro struct super_block *sb = file_inode(file)->i_sb; 736e145b35bSAl Viro int err, err2=0; 737e145b35bSAl Viro 738e145b35bSAl Viro err = ext4_resize_begin(sb); 739e145b35bSAl Viro if (err) 740e145b35bSAl Viro return err; 741e145b35bSAl Viro 742e145b35bSAl Viro if (ext4_has_feature_bigalloc(sb)) { 743e145b35bSAl Viro ext4_msg(sb, KERN_ERR, 744e145b35bSAl Viro "Online resizing not supported with bigalloc"); 745e145b35bSAl Viro err = -EOPNOTSUPP; 746e145b35bSAl Viro goto group_add_out; 747e145b35bSAl Viro } 748e145b35bSAl Viro 749e145b35bSAl Viro err = mnt_want_write_file(file); 750e145b35bSAl Viro if (err) 751e145b35bSAl Viro goto group_add_out; 752e145b35bSAl Viro 753e145b35bSAl Viro err = ext4_group_add(sb, input); 754e145b35bSAl Viro if (EXT4_SB(sb)->s_journal) { 755e145b35bSAl Viro jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 756e145b35bSAl Viro err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 757e145b35bSAl Viro jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 758e145b35bSAl Viro } 759e145b35bSAl Viro if (err == 0) 760e145b35bSAl Viro err = err2; 761e145b35bSAl Viro mnt_drop_write_file(file); 762e145b35bSAl Viro if (!err && ext4_has_group_desc_csum(sb) && 763e145b35bSAl Viro test_opt(sb, INIT_INODE_TABLE)) 764e145b35bSAl Viro err = ext4_register_li_request(sb, input->group); 765e145b35bSAl Viro group_add_out: 766e145b35bSAl Viro ext4_resize_end(sb); 767e145b35bSAl Viro return err; 768e145b35bSAl Viro } 769e145b35bSAl Viro 7707b0e492eSDarrick J. Wong static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa) 771dc7ac6c4SWang Shilong { 7727b0e492eSDarrick J. Wong struct ext4_inode_info *ei = EXT4_I(inode); 773dc7ac6c4SWang Shilong 7747b0e492eSDarrick J. Wong simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags & 7757b0e492eSDarrick J. Wong EXT4_FL_USER_VISIBLE)); 776dc7ac6c4SWang Shilong 7777b0e492eSDarrick J. Wong if (ext4_has_feature_project(inode->i_sb)) 7787b0e492eSDarrick J. Wong fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid); 779dc7ac6c4SWang Shilong } 780dc7ac6c4SWang Shilong 781bb5835edSTheodore Ts'o /* So that the fiemap access checks can't overflow on 32 bit machines. */ 782bb5835edSTheodore Ts'o #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) 783bb5835edSTheodore Ts'o 784bb5835edSTheodore Ts'o static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg) 785bb5835edSTheodore Ts'o { 786bb5835edSTheodore Ts'o struct fiemap fiemap; 787bb5835edSTheodore Ts'o struct fiemap __user *ufiemap = (struct fiemap __user *) arg; 788bb5835edSTheodore Ts'o struct fiemap_extent_info fieinfo = { 0, }; 789bb5835edSTheodore Ts'o struct inode *inode = file_inode(filp); 790bb5835edSTheodore Ts'o int error; 791bb5835edSTheodore Ts'o 792bb5835edSTheodore Ts'o if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap))) 793bb5835edSTheodore Ts'o return -EFAULT; 794bb5835edSTheodore Ts'o 795bb5835edSTheodore Ts'o if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) 796bb5835edSTheodore Ts'o return -EINVAL; 797bb5835edSTheodore Ts'o 798bb5835edSTheodore Ts'o fieinfo.fi_flags = fiemap.fm_flags; 799bb5835edSTheodore Ts'o fieinfo.fi_extents_max = fiemap.fm_extent_count; 800bb5835edSTheodore Ts'o fieinfo.fi_extents_start = ufiemap->fm_extents; 801bb5835edSTheodore Ts'o 802328e24aeSChristoph Hellwig error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, 803328e24aeSChristoph Hellwig fiemap.fm_length); 804bb5835edSTheodore Ts'o fiemap.fm_flags = fieinfo.fi_flags; 805bb5835edSTheodore Ts'o fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; 806bb5835edSTheodore Ts'o if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap))) 807bb5835edSTheodore Ts'o error = -EFAULT; 808bb5835edSTheodore Ts'o 809bb5835edSTheodore Ts'o return error; 810bb5835edSTheodore Ts'o } 811bb5835edSTheodore Ts'o 812aa75f4d3SHarshad Shirwadkar static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 8139b7365fcSLi Xi { 8149b7365fcSLi Xi struct inode *inode = file_inode(filp); 8159b7365fcSLi Xi struct super_block *sb = inode->i_sb; 8169b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 8179b7365fcSLi Xi unsigned int flags; 8189b7365fcSLi Xi 8199b7365fcSLi Xi ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 8209b7365fcSLi Xi 8219b7365fcSLi Xi switch (cmd) { 8220c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 8230c9ec4beSDarrick J. Wong return ext4_ioc_getfsmap(sb, (void __user *)arg); 824cb29a02dSEric Biggers case FS_IOC_GETFLAGS: 8259b7365fcSLi Xi flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 8267ddf79a1SWang Shilong if (S_ISREG(inode->i_mode)) 8277ddf79a1SWang Shilong flags &= ~EXT4_PROJINHERIT_FL; 8289b7365fcSLi Xi return put_user(flags, (int __user *) arg); 829cb29a02dSEric Biggers case FS_IOC_SETFLAGS: { 8309b7365fcSLi Xi int err; 8319b7365fcSLi Xi 8329b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 8339b7365fcSLi Xi return -EACCES; 8349b7365fcSLi Xi 8359b7365fcSLi Xi if (get_user(flags, (int __user *) arg)) 8369b7365fcSLi Xi return -EFAULT; 8379b7365fcSLi Xi 838d14e7683SJan Kara if (flags & ~EXT4_FL_USER_VISIBLE) 839d14e7683SJan Kara return -EOPNOTSUPP; 840d14e7683SJan Kara /* 841d14e7683SJan Kara * chattr(1) grabs flags via GETFLAGS, modifies the result and 842d14e7683SJan Kara * passes that to SETFLAGS. So we cannot easily make SETFLAGS 843d14e7683SJan Kara * more restrictive than just silently masking off visible but 844d14e7683SJan Kara * not settable flags as we always did. 845d14e7683SJan Kara */ 846d14e7683SJan Kara flags &= EXT4_FL_USER_MODIFIABLE; 847d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 848d14e7683SJan Kara return -EOPNOTSUPP; 849d14e7683SJan Kara 8509b7365fcSLi Xi err = mnt_want_write_file(filp); 8519b7365fcSLi Xi if (err) 8529b7365fcSLi Xi return err; 8539b7365fcSLi Xi 8545955102cSAl Viro inode_lock(inode); 8552e538403SDarrick J. Wong err = ext4_ioctl_check_immutable(inode, 8562e538403SDarrick J. Wong from_kprojid(&init_user_ns, ei->i_projid), 8572e538403SDarrick J. Wong flags); 8582e538403SDarrick J. Wong if (!err) 8599b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 8605955102cSAl Viro inode_unlock(inode); 8612a79f17eSAl Viro mnt_drop_write_file(filp); 862ac27a0ecSDave Kleikamp return err; 863ac27a0ecSDave Kleikamp } 864617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 865617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 866ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 867617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 868617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 869ac27a0ecSDave Kleikamp handle_t *handle; 870617ba13bSMingming Cao struct ext4_iloc iloc; 871ac27a0ecSDave Kleikamp __u32 generation; 872ac27a0ecSDave Kleikamp int err; 873ac27a0ecSDave Kleikamp 8742e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 875ac27a0ecSDave Kleikamp return -EPERM; 87642a74f20SDave Hansen 8779aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 878814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 879814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 880814525f4SDarrick J. Wong return -ENOTTY; 881814525f4SDarrick J. Wong } 882814525f4SDarrick J. Wong 883a561be71SAl Viro err = mnt_want_write_file(filp); 88442a74f20SDave Hansen if (err) 88542a74f20SDave Hansen return err; 88642a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 88742a74f20SDave Hansen err = -EFAULT; 88842a74f20SDave Hansen goto setversion_out; 88942a74f20SDave Hansen } 890ac27a0ecSDave Kleikamp 8915955102cSAl Viro inode_lock(inode); 8929924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 89342a74f20SDave Hansen if (IS_ERR(handle)) { 89442a74f20SDave Hansen err = PTR_ERR(handle); 8956c2155b9SDjalal Harouni goto unlock_out; 89642a74f20SDave Hansen } 897617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 898ac27a0ecSDave Kleikamp if (err == 0) { 899eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 900ac27a0ecSDave Kleikamp inode->i_generation = generation; 901617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 902ac27a0ecSDave Kleikamp } 903617ba13bSMingming Cao ext4_journal_stop(handle); 9046c2155b9SDjalal Harouni 9056c2155b9SDjalal Harouni unlock_out: 9065955102cSAl Viro inode_unlock(inode); 90742a74f20SDave Hansen setversion_out: 9082a79f17eSAl Viro mnt_drop_write_file(filp); 909ac27a0ecSDave Kleikamp return err; 910ac27a0ecSDave Kleikamp } 911617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 912617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 913ac046f1dSPeng Tao int err, err2=0; 914ac27a0ecSDave Kleikamp 9158f82f840SYongqiang Yang err = ext4_resize_begin(sb); 9168f82f840SYongqiang Yang if (err) 9178f82f840SYongqiang Yang return err; 918ac27a0ecSDave Kleikamp 919014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 920014a1770SDjalal Harouni err = -EFAULT; 921014a1770SDjalal Harouni goto group_extend_out; 922014a1770SDjalal Harouni } 923ac27a0ecSDave Kleikamp 924e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 925bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 926bab08ab9STheodore Ts'o "Online resizing not supported with bigalloc"); 927014a1770SDjalal Harouni err = -EOPNOTSUPP; 928014a1770SDjalal Harouni goto group_extend_out; 929bab08ab9STheodore Ts'o } 930bab08ab9STheodore Ts'o 931a561be71SAl Viro err = mnt_want_write_file(filp); 93242a74f20SDave Hansen if (err) 933014a1770SDjalal Harouni goto group_extend_out; 93442a74f20SDave Hansen 935617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 936ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 937dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 9387ffe1ea8SHidehiro Kawai err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 939dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 940ac046f1dSPeng Tao } 9417ffe1ea8SHidehiro Kawai if (err == 0) 9427ffe1ea8SHidehiro Kawai err = err2; 9432a79f17eSAl Viro mnt_drop_write_file(filp); 944014a1770SDjalal Harouni group_extend_out: 9458f82f840SYongqiang Yang ext4_resize_end(sb); 946ac27a0ecSDave Kleikamp return err; 947ac27a0ecSDave Kleikamp } 948748de673SAkira Fujita 949748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 950748de673SAkira Fujita struct move_extent me; 9512903ff01SAl Viro struct fd donor; 9522903ff01SAl Viro int err; 953748de673SAkira Fujita 9544a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 9554a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 9564a58579bSAkira Fujita return -EBADF; 9574a58579bSAkira Fujita 958748de673SAkira Fujita if (copy_from_user(&me, 959748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 960748de673SAkira Fujita return -EFAULT; 9614a58579bSAkira Fujita me.moved_len = 0; 962748de673SAkira Fujita 9632903ff01SAl Viro donor = fdget(me.donor_fd); 9642903ff01SAl Viro if (!donor.file) 965748de673SAkira Fujita return -EBADF; 966748de673SAkira Fujita 9672903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 9684a58579bSAkira Fujita err = -EBADF; 9694a58579bSAkira Fujita goto mext_out; 970748de673SAkira Fujita } 971748de673SAkira Fujita 972e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 973bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 974bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 975399c9b86SAl Viro err = -EOPNOTSUPP; 976399c9b86SAl Viro goto mext_out; 97773f34a5eSRoss Zwisler } else if (IS_DAX(inode)) { 97873f34a5eSRoss Zwisler ext4_msg(sb, KERN_ERR, 97973f34a5eSRoss Zwisler "Online defrag not supported with DAX"); 98073f34a5eSRoss Zwisler err = -EOPNOTSUPP; 98173f34a5eSRoss Zwisler goto mext_out; 982bab08ab9STheodore Ts'o } 983bab08ab9STheodore Ts'o 984a561be71SAl Viro err = mnt_want_write_file(filp); 9854a58579bSAkira Fujita if (err) 9864a58579bSAkira Fujita goto mext_out; 9874a58579bSAkira Fujita 9882903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 989748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 9902a79f17eSAl Viro mnt_drop_write_file(filp); 991748de673SAkira Fujita 992c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 993c437b273SAkira Fujita &me, sizeof(me))) 9944a58579bSAkira Fujita err = -EFAULT; 9954a58579bSAkira Fujita mext_out: 9962903ff01SAl Viro fdput(donor); 997748de673SAkira Fujita return err; 998748de673SAkira Fujita } 999748de673SAkira Fujita 1000617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 1001617ba13bSMingming Cao struct ext4_new_group_data input; 1002ac27a0ecSDave Kleikamp 1003617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 1004e145b35bSAl Viro sizeof(input))) 1005e145b35bSAl Viro return -EFAULT; 1006ac27a0ecSDave Kleikamp 1007e145b35bSAl Viro return ext4_ioctl_group_add(filp, &input); 1008ac27a0ecSDave Kleikamp } 1009ac27a0ecSDave Kleikamp 1010c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 10112a43a878SAneesh Kumar K.V { 10122a43a878SAneesh Kumar K.V int err; 10132e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 10142a43a878SAneesh Kumar K.V return -EACCES; 10152a43a878SAneesh Kumar K.V 1016a561be71SAl Viro err = mnt_want_write_file(filp); 10172a43a878SAneesh Kumar K.V if (err) 10182a43a878SAneesh Kumar K.V return err; 10192a43a878SAneesh Kumar K.V /* 10202a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 10212a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 10222a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 10232a43a878SAneesh Kumar K.V * inode format to prevent read. 10242a43a878SAneesh Kumar K.V */ 10255955102cSAl Viro inode_lock((inode)); 10262a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 10275955102cSAl Viro inode_unlock((inode)); 10282a79f17eSAl Viro mnt_drop_write_file(filp); 10292a43a878SAneesh Kumar K.V return err; 10302a43a878SAneesh Kumar K.V } 1031c14c6fd5SAneesh Kumar K.V 1032ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 1033ccd2506bSTheodore Ts'o { 1034ccd2506bSTheodore Ts'o int err; 10352e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 1036ccd2506bSTheodore Ts'o return -EACCES; 1037ccd2506bSTheodore Ts'o 1038a561be71SAl Viro err = mnt_want_write_file(filp); 1039ccd2506bSTheodore Ts'o if (err) 1040ccd2506bSTheodore Ts'o return err; 1041ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 10422a79f17eSAl Viro mnt_drop_write_file(filp); 1043ccd2506bSTheodore Ts'o return err; 1044ccd2506bSTheodore Ts'o } 1045ccd2506bSTheodore Ts'o 1046393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 10473e67cfadSDmitry Monakhov { 10483e67cfadSDmitry Monakhov int err; 1049393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 1050393d1d1dSDr. Tilmann Bubeck return -EBADF; 10513e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 10523e67cfadSDmitry Monakhov if (err) 10533e67cfadSDmitry Monakhov return err; 10543e67cfadSDmitry Monakhov err = swap_inode_boot_loader(sb, inode); 10553e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 10563e67cfadSDmitry Monakhov return err; 10573e67cfadSDmitry Monakhov } 1058393d1d1dSDr. Tilmann Bubeck 105919c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 106019c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 106119c5246dSYongqiang Yang int err = 0, err2 = 0; 10627f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 106319c5246dSYongqiang Yang 106419c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 106519c5246dSYongqiang Yang sizeof(__u64))) { 106619c5246dSYongqiang Yang return -EFAULT; 106719c5246dSYongqiang Yang } 106819c5246dSYongqiang Yang 106919c5246dSYongqiang Yang err = ext4_resize_begin(sb); 107019c5246dSYongqiang Yang if (err) 107119c5246dSYongqiang Yang return err; 107219c5246dSYongqiang Yang 10738cae6f71SAl Viro err = mnt_want_write_file(filp); 107419c5246dSYongqiang Yang if (err) 107519c5246dSYongqiang Yang goto resizefs_out; 107619c5246dSYongqiang Yang 107719c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 107819c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 1079aa75f4d3SHarshad Shirwadkar ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE); 108019c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 108119c5246dSYongqiang Yang err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 108219c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 108319c5246dSYongqiang Yang } 108419c5246dSYongqiang Yang if (err == 0) 108519c5246dSYongqiang Yang err = err2; 10868cae6f71SAl Viro mnt_drop_write_file(filp); 1087310a997fSKirill Tkhai if (!err && (o_group < EXT4_SB(sb)->s_groups_count) && 10887f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 10897f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 10907f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 10917f511862STheodore Ts'o 109219c5246dSYongqiang Yang resizefs_out: 109319c5246dSYongqiang Yang ext4_resize_end(sb); 109419c5246dSYongqiang Yang return err; 109519c5246dSYongqiang Yang } 109619c5246dSYongqiang Yang 1097e681c047SLukas Czerner case FITRIM: 1098e681c047SLukas Czerner { 109941431792SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 1100e681c047SLukas Czerner struct fstrim_range range; 1101e681c047SLukas Czerner int ret = 0; 1102e681c047SLukas Czerner 1103e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 1104e681c047SLukas Czerner return -EPERM; 1105e681c047SLukas Czerner 110641431792SLukas Czerner if (!blk_queue_discard(q)) 110741431792SLukas Czerner return -EOPNOTSUPP; 110841431792SLukas Czerner 110918915b58SDarrick J. Wong /* 111018915b58SDarrick J. Wong * We haven't replayed the journal, so we cannot use our 111118915b58SDarrick J. Wong * block-bitmap-guided storage zapping commands. 111218915b58SDarrick J. Wong */ 111318915b58SDarrick J. Wong if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) 111418915b58SDarrick J. Wong return -EROFS; 111518915b58SDarrick J. Wong 1116e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 1117e681c047SLukas Czerner sizeof(range))) 1118e681c047SLukas Czerner return -EFAULT; 1119e681c047SLukas Czerner 11205c2ed62fSLukas Czerner range.minlen = max((unsigned int)range.minlen, 11215c2ed62fSLukas Czerner q->limits.discard_granularity); 1122e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 1123e681c047SLukas Czerner if (ret < 0) 1124e681c047SLukas Czerner return ret; 1125e681c047SLukas Czerner 1126e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 1127e681c047SLukas Czerner sizeof(range))) 1128e681c047SLukas Czerner return -EFAULT; 1129e681c047SLukas Czerner 1130e681c047SLukas Czerner return 0; 1131e681c047SLukas Czerner } 11327869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 11337869a4a6STheodore Ts'o return ext4_ext_precache(inode); 1134e681c047SLukas Czerner 1135cb29a02dSEric Biggers case FS_IOC_SET_ENCRYPTION_POLICY: 11369a200d07SRichard Weinberger if (!ext4_has_feature_encrypt(sb)) 11379a200d07SRichard Weinberger return -EOPNOTSUPP; 1138db717d8eSEric Biggers return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); 11399a200d07SRichard Weinberger 1140cb29a02dSEric Biggers case FS_IOC_GET_ENCRYPTION_PWSALT: { 1141643fa961SChandan Rajendra #ifdef CONFIG_FS_ENCRYPTION 11429bd8212fSMichael Halcrow int err, err2; 11439bd8212fSMichael Halcrow struct ext4_sb_info *sbi = EXT4_SB(sb); 11449bd8212fSMichael Halcrow handle_t *handle; 11459bd8212fSMichael Halcrow 114635997d1cSEric Biggers if (!ext4_has_feature_encrypt(sb)) 11479bd8212fSMichael Halcrow return -EOPNOTSUPP; 11489bd8212fSMichael Halcrow if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { 11499bd8212fSMichael Halcrow err = mnt_want_write_file(filp); 11509bd8212fSMichael Halcrow if (err) 11519bd8212fSMichael Halcrow return err; 11529bd8212fSMichael Halcrow handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); 11539bd8212fSMichael Halcrow if (IS_ERR(handle)) { 11549bd8212fSMichael Halcrow err = PTR_ERR(handle); 11559bd8212fSMichael Halcrow goto pwsalt_err_exit; 11569bd8212fSMichael Halcrow } 11579bd8212fSMichael Halcrow err = ext4_journal_get_write_access(handle, sbi->s_sbh); 11589bd8212fSMichael Halcrow if (err) 11599bd8212fSMichael Halcrow goto pwsalt_err_journal; 11609bd8212fSMichael Halcrow generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); 11619bd8212fSMichael Halcrow err = ext4_handle_dirty_metadata(handle, NULL, 11629bd8212fSMichael Halcrow sbi->s_sbh); 11639bd8212fSMichael Halcrow pwsalt_err_journal: 11649bd8212fSMichael Halcrow err2 = ext4_journal_stop(handle); 11659bd8212fSMichael Halcrow if (err2 && !err) 11669bd8212fSMichael Halcrow err = err2; 11679bd8212fSMichael Halcrow pwsalt_err_exit: 11689bd8212fSMichael Halcrow mnt_drop_write_file(filp); 11699bd8212fSMichael Halcrow if (err) 11709bd8212fSMichael Halcrow return err; 11719bd8212fSMichael Halcrow } 1172b4ab9e29SFabian Frederick if (copy_to_user((void __user *) arg, 1173b4ab9e29SFabian Frederick sbi->s_es->s_encrypt_pw_salt, 16)) 11749bd8212fSMichael Halcrow return -EFAULT; 11759bd8212fSMichael Halcrow return 0; 1176ba679017SEric Biggers #else 1177ba679017SEric Biggers return -EOPNOTSUPP; 1178ba679017SEric Biggers #endif 11799bd8212fSMichael Halcrow } 1180cb29a02dSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY: 11810642ea24SChao Yu if (!ext4_has_feature_encrypt(sb)) 11820642ea24SChao Yu return -EOPNOTSUPP; 1183db717d8eSEric Biggers return fscrypt_ioctl_get_policy(filp, (void __user *)arg); 11849bd8212fSMichael Halcrow 118529b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY_EX: 118629b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 118729b3692eSEric Biggers return -EOPNOTSUPP; 118829b3692eSEric Biggers return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg); 118929b3692eSEric Biggers 119029b3692eSEric Biggers case FS_IOC_ADD_ENCRYPTION_KEY: 119129b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 119229b3692eSEric Biggers return -EOPNOTSUPP; 119329b3692eSEric Biggers return fscrypt_ioctl_add_key(filp, (void __user *)arg); 119429b3692eSEric Biggers 119529b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY: 119629b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 119729b3692eSEric Biggers return -EOPNOTSUPP; 119829b3692eSEric Biggers return fscrypt_ioctl_remove_key(filp, (void __user *)arg); 119929b3692eSEric Biggers 120029b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 120129b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 120229b3692eSEric Biggers return -EOPNOTSUPP; 120329b3692eSEric Biggers return fscrypt_ioctl_remove_key_all_users(filp, 120429b3692eSEric Biggers (void __user *)arg); 120529b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 120629b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 120729b3692eSEric Biggers return -EOPNOTSUPP; 120829b3692eSEric Biggers return fscrypt_ioctl_get_key_status(filp, (void __user *)arg); 120929b3692eSEric Biggers 12107ec9f3b4SEric Biggers case FS_IOC_GET_ENCRYPTION_NONCE: 12117ec9f3b4SEric Biggers if (!ext4_has_feature_encrypt(sb)) 12127ec9f3b4SEric Biggers return -EOPNOTSUPP; 12137ec9f3b4SEric Biggers return fscrypt_ioctl_get_nonce(filp, (void __user *)arg); 12147ec9f3b4SEric Biggers 1215b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 1216b0c013e2STheodore Ts'o { 1217b0c013e2STheodore Ts'o if (!inode_owner_or_capable(inode)) 1218b0c013e2STheodore Ts'o return -EACCES; 1219b0c013e2STheodore Ts'o ext4_clear_inode_es(inode); 1220b0c013e2STheodore Ts'o return 0; 1221b0c013e2STheodore Ts'o } 1222b0c013e2STheodore Ts'o 12231ad3ea6eSTheodore Ts'o case EXT4_IOC_GETSTATE: 12241ad3ea6eSTheodore Ts'o { 12251ad3ea6eSTheodore Ts'o __u32 state = 0; 12261ad3ea6eSTheodore Ts'o 12271ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED)) 12281ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_EXT_PRECACHED; 12291ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_NEW)) 12301ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_NEW; 12311ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY)) 12321ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_NEWENTRY; 12331ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) 12341ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE; 12351ad3ea6eSTheodore Ts'o 12361ad3ea6eSTheodore Ts'o return put_user(state, (__u32 __user *) arg); 12371ad3ea6eSTheodore Ts'o } 12381ad3ea6eSTheodore Ts'o 1239bb5835edSTheodore Ts'o case EXT4_IOC_GET_ES_CACHE: 1240bb5835edSTheodore Ts'o return ext4_ioctl_get_es_cache(filp, arg); 1241bb5835edSTheodore Ts'o 1242cb29a02dSEric Biggers case FS_IOC_FSGETXATTR: 12439b7365fcSLi Xi { 12449b7365fcSLi Xi struct fsxattr fa; 12459b7365fcSLi Xi 12467b0e492eSDarrick J. Wong ext4_fill_fsxattr(inode, &fa); 12479b7365fcSLi Xi 12489b7365fcSLi Xi if (copy_to_user((struct fsxattr __user *)arg, 12499b7365fcSLi Xi &fa, sizeof(fa))) 12509b7365fcSLi Xi return -EFAULT; 12519b7365fcSLi Xi return 0; 12529b7365fcSLi Xi } 1253cb29a02dSEric Biggers case FS_IOC_FSSETXATTR: 12549b7365fcSLi Xi { 12557b0e492eSDarrick J. Wong struct fsxattr fa, old_fa; 12569b7365fcSLi Xi int err; 12579b7365fcSLi Xi 12589b7365fcSLi Xi if (copy_from_user(&fa, (struct fsxattr __user *)arg, 12599b7365fcSLi Xi sizeof(fa))) 12609b7365fcSLi Xi return -EFAULT; 12619b7365fcSLi Xi 12629b7365fcSLi Xi /* Make sure caller has proper permission */ 12639b7365fcSLi Xi if (!inode_owner_or_capable(inode)) 12649b7365fcSLi Xi return -EACCES; 12659b7365fcSLi Xi 1266d14e7683SJan Kara if (fa.fsx_xflags & ~EXT4_SUPPORTED_FS_XFLAGS) 1267d14e7683SJan Kara return -EOPNOTSUPP; 1268d14e7683SJan Kara 1269d14e7683SJan Kara flags = ext4_xflags_to_iflags(fa.fsx_xflags); 1270d14e7683SJan Kara if (ext4_mask_flags(inode->i_mode, flags) != flags) 1271d14e7683SJan Kara return -EOPNOTSUPP; 1272d14e7683SJan Kara 12739b7365fcSLi Xi err = mnt_want_write_file(filp); 12749b7365fcSLi Xi if (err) 12759b7365fcSLi Xi return err; 12769b7365fcSLi Xi 12775955102cSAl Viro inode_lock(inode); 12787b0e492eSDarrick J. Wong ext4_fill_fsxattr(inode, &old_fa); 12797b0e492eSDarrick J. Wong err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa); 1280dc7ac6c4SWang Shilong if (err) 1281dc7ac6c4SWang Shilong goto out; 12829b7365fcSLi Xi flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | 12839b7365fcSLi Xi (flags & EXT4_FL_XFLAG_VISIBLE); 12842e538403SDarrick J. Wong err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags); 12852e538403SDarrick J. Wong if (err) 12862e538403SDarrick J. Wong goto out; 12879b7365fcSLi Xi err = ext4_ioctl_setflags(inode, flags); 1288dc7ac6c4SWang Shilong if (err) 1289dc7ac6c4SWang Shilong goto out; 1290dc7ac6c4SWang Shilong err = ext4_ioctl_setproject(filp, fa.fsx_projid); 1291dc7ac6c4SWang Shilong out: 12925955102cSAl Viro inode_unlock(inode); 12939b7365fcSLi Xi mnt_drop_write_file(filp); 12949b7365fcSLi Xi return err; 12959b7365fcSLi Xi } 1296e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 1297e9be2ac7STheodore Ts'o return ext4_shutdown(sb, arg); 1298c93d8f88SEric Biggers 1299c93d8f88SEric Biggers case FS_IOC_ENABLE_VERITY: 1300c93d8f88SEric Biggers if (!ext4_has_feature_verity(sb)) 1301c93d8f88SEric Biggers return -EOPNOTSUPP; 1302c93d8f88SEric Biggers return fsverity_ioctl_enable(filp, (const void __user *)arg); 1303c93d8f88SEric Biggers 1304c93d8f88SEric Biggers case FS_IOC_MEASURE_VERITY: 1305c93d8f88SEric Biggers if (!ext4_has_feature_verity(sb)) 1306c93d8f88SEric Biggers return -EOPNOTSUPP; 1307c93d8f88SEric Biggers return fsverity_ioctl_measure(filp, (void __user *)arg); 1308c93d8f88SEric Biggers 1309ac27a0ecSDave Kleikamp default: 1310ac27a0ecSDave Kleikamp return -ENOTTY; 1311ac27a0ecSDave Kleikamp } 1312ac27a0ecSDave Kleikamp } 1313ac27a0ecSDave Kleikamp 1314aa75f4d3SHarshad Shirwadkar long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1315aa75f4d3SHarshad Shirwadkar { 1316aa75f4d3SHarshad Shirwadkar long ret; 1317aa75f4d3SHarshad Shirwadkar 1318aa75f4d3SHarshad Shirwadkar ext4_fc_start_update(file_inode(filp)); 1319aa75f4d3SHarshad Shirwadkar ret = __ext4_ioctl(filp, cmd, arg); 1320aa75f4d3SHarshad Shirwadkar ext4_fc_stop_update(file_inode(filp)); 1321aa75f4d3SHarshad Shirwadkar 1322aa75f4d3SHarshad Shirwadkar return ret; 1323aa75f4d3SHarshad Shirwadkar } 1324aa75f4d3SHarshad Shirwadkar 1325ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 1326617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1327ac27a0ecSDave Kleikamp { 1328ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 1329ac27a0ecSDave Kleikamp switch (cmd) { 1330cb29a02dSEric Biggers case FS_IOC32_GETFLAGS: 1331cb29a02dSEric Biggers cmd = FS_IOC_GETFLAGS; 1332ac27a0ecSDave Kleikamp break; 1333cb29a02dSEric Biggers case FS_IOC32_SETFLAGS: 1334cb29a02dSEric Biggers cmd = FS_IOC_SETFLAGS; 1335ac27a0ecSDave Kleikamp break; 1336617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 1337617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 1338ac27a0ecSDave Kleikamp break; 1339617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 1340617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 1341ac27a0ecSDave Kleikamp break; 1342617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 1343617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 1344ac27a0ecSDave Kleikamp break; 1345617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 1346617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 1347ac27a0ecSDave Kleikamp break; 1348617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 1349617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 1350ac27a0ecSDave Kleikamp break; 1351617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 1352617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 1353ac27a0ecSDave Kleikamp break; 1354617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 1355617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 1356ac27a0ecSDave Kleikamp break; 13574d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 13584d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 1359e145b35bSAl Viro struct ext4_new_group_data input; 13604d92dc0fSBen Hutchings int err; 13614d92dc0fSBen Hutchings 13624d92dc0fSBen Hutchings uinput = compat_ptr(arg); 13634d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 13644d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 13654d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 13664d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 13674d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 13684d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 13694d92dc0fSBen Hutchings &uinput->reserved_blocks); 13704d92dc0fSBen Hutchings if (err) 13714d92dc0fSBen Hutchings return -EFAULT; 1372e145b35bSAl Viro return ext4_ioctl_group_add(file, &input); 13734d92dc0fSBen Hutchings } 1374b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 137519c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 1376314999dcSArnd Bergmann case FITRIM: 13777869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 1378cb29a02dSEric Biggers case FS_IOC_SET_ENCRYPTION_POLICY: 1379cb29a02dSEric Biggers case FS_IOC_GET_ENCRYPTION_PWSALT: 1380cb29a02dSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY: 138129b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY_EX: 138229b3692eSEric Biggers case FS_IOC_ADD_ENCRYPTION_KEY: 138329b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY: 138429b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 138529b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 13867ec9f3b4SEric Biggers case FS_IOC_GET_ENCRYPTION_NONCE: 1387e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 13880c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 1389c93d8f88SEric Biggers case FS_IOC_ENABLE_VERITY: 1390c93d8f88SEric Biggers case FS_IOC_MEASURE_VERITY: 1391b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 13921ad3ea6eSTheodore Ts'o case EXT4_IOC_GETSTATE: 1393bb5835edSTheodore Ts'o case EXT4_IOC_GET_ES_CACHE: 1394cb29a02dSEric Biggers case FS_IOC_FSGETXATTR: 1395cb29a02dSEric Biggers case FS_IOC_FSSETXATTR: 1396b684b2eeSChristian Borntraeger break; 1397ac27a0ecSDave Kleikamp default: 1398ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 1399ac27a0ecSDave Kleikamp } 14005cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 1401ac27a0ecSDave Kleikamp } 1402ac27a0ecSDave Kleikamp #endif 1403