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> 197c0f6ba6SLinus Torvalds #include <linux/uaccess.h> 20783d9485STheodore Ts'o #include <linux/delay.h> 21ee73f9a5SJeff Layton #include <linux/iversion.h> 224db5c2e6SMiklos Szeredi #include <linux/fileattr.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 29bbc605cdSLukas Czerner typedef void ext4_update_sb_callback(struct ext4_super_block *es, 30bbc605cdSLukas Czerner const void *arg); 31bbc605cdSLukas Czerner 32bbc605cdSLukas Czerner /* 33bbc605cdSLukas Czerner * Superblock modification callback function for changing file system 34bbc605cdSLukas Czerner * label 35bbc605cdSLukas Czerner */ 36bbc605cdSLukas Czerner static void ext4_sb_setlabel(struct ext4_super_block *es, const void *arg) 37bbc605cdSLukas Czerner { 38bbc605cdSLukas Czerner /* Sanity check, this should never happen */ 39bbc605cdSLukas Czerner BUILD_BUG_ON(sizeof(es->s_volume_name) < EXT4_LABEL_MAX); 40bbc605cdSLukas Czerner 41bbc605cdSLukas Czerner memcpy(es->s_volume_name, (char *)arg, EXT4_LABEL_MAX); 42bbc605cdSLukas Czerner } 43bbc605cdSLukas Czerner 44bbc605cdSLukas Czerner static 45bbc605cdSLukas Czerner int ext4_update_primary_sb(struct super_block *sb, handle_t *handle, 46bbc605cdSLukas Czerner ext4_update_sb_callback func, 47bbc605cdSLukas Czerner const void *arg) 48bbc605cdSLukas Czerner { 49bbc605cdSLukas Czerner int err = 0; 50bbc605cdSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 51bbc605cdSLukas Czerner struct buffer_head *bh = sbi->s_sbh; 52bbc605cdSLukas Czerner struct ext4_super_block *es = sbi->s_es; 53bbc605cdSLukas Czerner 54bbc605cdSLukas Czerner trace_ext4_update_sb(sb, bh->b_blocknr, 1); 55bbc605cdSLukas Czerner 56bbc605cdSLukas Czerner BUFFER_TRACE(bh, "get_write_access"); 57bbc605cdSLukas Czerner err = ext4_journal_get_write_access(handle, sb, 58bbc605cdSLukas Czerner bh, 59bbc605cdSLukas Czerner EXT4_JTR_NONE); 60bbc605cdSLukas Czerner if (err) 61bbc605cdSLukas Czerner goto out_err; 62bbc605cdSLukas Czerner 63bbc605cdSLukas Czerner lock_buffer(bh); 64bbc605cdSLukas Czerner func(es, arg); 65bbc605cdSLukas Czerner ext4_superblock_csum_set(sb); 66bbc605cdSLukas Czerner unlock_buffer(bh); 67bbc605cdSLukas Czerner 68bbc605cdSLukas Czerner if (buffer_write_io_error(bh) || !buffer_uptodate(bh)) { 69bbc605cdSLukas Czerner ext4_msg(sbi->s_sb, KERN_ERR, "previous I/O error to " 70bbc605cdSLukas Czerner "superblock detected"); 71bbc605cdSLukas Czerner clear_buffer_write_io_error(bh); 72bbc605cdSLukas Czerner set_buffer_uptodate(bh); 73bbc605cdSLukas Czerner } 74bbc605cdSLukas Czerner 75bbc605cdSLukas Czerner err = ext4_handle_dirty_metadata(handle, NULL, bh); 76bbc605cdSLukas Czerner if (err) 77bbc605cdSLukas Czerner goto out_err; 78bbc605cdSLukas Czerner err = sync_dirty_buffer(bh); 79bbc605cdSLukas Czerner out_err: 80bbc605cdSLukas Czerner ext4_std_error(sb, err); 81bbc605cdSLukas Czerner return err; 82bbc605cdSLukas Czerner } 83bbc605cdSLukas Czerner 84bbc605cdSLukas Czerner /* 85bbc605cdSLukas Czerner * Update one backup superblock in the group 'grp' using the callback 86bbc605cdSLukas Czerner * function 'func' and argument 'arg'. If the handle is NULL the 87bbc605cdSLukas Czerner * modification is not journalled. 88bbc605cdSLukas Czerner * 89bbc605cdSLukas Czerner * Returns: 0 when no modification was done (no superblock in the group) 90bbc605cdSLukas Czerner * 1 when the modification was successful 91bbc605cdSLukas Czerner * <0 on error 92bbc605cdSLukas Czerner */ 93bbc605cdSLukas Czerner static int ext4_update_backup_sb(struct super_block *sb, 94bbc605cdSLukas Czerner handle_t *handle, ext4_group_t grp, 95bbc605cdSLukas Czerner ext4_update_sb_callback func, const void *arg) 96bbc605cdSLukas Czerner { 97bbc605cdSLukas Czerner int err = 0; 98bbc605cdSLukas Czerner ext4_fsblk_t sb_block; 99bbc605cdSLukas Czerner struct buffer_head *bh; 100bbc605cdSLukas Czerner unsigned long offset = 0; 101bbc605cdSLukas Czerner struct ext4_super_block *es; 102bbc605cdSLukas Czerner 103bbc605cdSLukas Czerner if (!ext4_bg_has_super(sb, grp)) 104bbc605cdSLukas Czerner return 0; 105bbc605cdSLukas Czerner 106bbc605cdSLukas Czerner /* 107bbc605cdSLukas Czerner * For the group 0 there is always 1k padding, so we have 108bbc605cdSLukas Czerner * either adjust offset, or sb_block depending on blocksize 109bbc605cdSLukas Czerner */ 110bbc605cdSLukas Czerner if (grp == 0) { 111bbc605cdSLukas Czerner sb_block = 1 * EXT4_MIN_BLOCK_SIZE; 112bbc605cdSLukas Czerner offset = do_div(sb_block, sb->s_blocksize); 113bbc605cdSLukas Czerner } else { 114bbc605cdSLukas Czerner sb_block = ext4_group_first_block_no(sb, grp); 115bbc605cdSLukas Czerner offset = 0; 116bbc605cdSLukas Czerner } 117bbc605cdSLukas Czerner 118bbc605cdSLukas Czerner trace_ext4_update_sb(sb, sb_block, handle ? 1 : 0); 119bbc605cdSLukas Czerner 120bbc605cdSLukas Czerner bh = ext4_sb_bread(sb, sb_block, 0); 121bbc605cdSLukas Czerner if (IS_ERR(bh)) 122bbc605cdSLukas Czerner return PTR_ERR(bh); 123bbc605cdSLukas Czerner 124bbc605cdSLukas Czerner if (handle) { 125bbc605cdSLukas Czerner BUFFER_TRACE(bh, "get_write_access"); 126bbc605cdSLukas Czerner err = ext4_journal_get_write_access(handle, sb, 127bbc605cdSLukas Czerner bh, 128bbc605cdSLukas Czerner EXT4_JTR_NONE); 129bbc605cdSLukas Czerner if (err) 130bbc605cdSLukas Czerner goto out_bh; 131bbc605cdSLukas Czerner } 132bbc605cdSLukas Czerner 133bbc605cdSLukas Czerner es = (struct ext4_super_block *) (bh->b_data + offset); 134bbc605cdSLukas Czerner lock_buffer(bh); 135bbc605cdSLukas Czerner if (ext4_has_metadata_csum(sb) && 136bbc605cdSLukas Czerner es->s_checksum != ext4_superblock_csum(sb, es)) { 137bbc605cdSLukas Czerner ext4_msg(sb, KERN_ERR, "Invalid checksum for backup " 138bbc605cdSLukas Czerner "superblock %llu\n", sb_block); 139bbc605cdSLukas Czerner unlock_buffer(bh); 140bbc605cdSLukas Czerner err = -EFSBADCRC; 141bbc605cdSLukas Czerner goto out_bh; 142bbc605cdSLukas Czerner } 143bbc605cdSLukas Czerner func(es, arg); 144bbc605cdSLukas Czerner if (ext4_has_metadata_csum(sb)) 145bbc605cdSLukas Czerner es->s_checksum = ext4_superblock_csum(sb, es); 146bbc605cdSLukas Czerner set_buffer_uptodate(bh); 147bbc605cdSLukas Czerner unlock_buffer(bh); 148bbc605cdSLukas Czerner 149bbc605cdSLukas Czerner if (err) 150bbc605cdSLukas Czerner goto out_bh; 151bbc605cdSLukas Czerner 152bbc605cdSLukas Czerner if (handle) { 153bbc605cdSLukas Czerner err = ext4_handle_dirty_metadata(handle, NULL, bh); 154bbc605cdSLukas Czerner if (err) 155bbc605cdSLukas Czerner goto out_bh; 156bbc605cdSLukas Czerner } else { 157bbc605cdSLukas Czerner BUFFER_TRACE(bh, "marking dirty"); 158bbc605cdSLukas Czerner mark_buffer_dirty(bh); 159bbc605cdSLukas Czerner } 160bbc605cdSLukas Czerner err = sync_dirty_buffer(bh); 161bbc605cdSLukas Czerner 162bbc605cdSLukas Czerner out_bh: 163bbc605cdSLukas Czerner brelse(bh); 164bbc605cdSLukas Czerner ext4_std_error(sb, err); 165bbc605cdSLukas Czerner return (err) ? err : 1; 166bbc605cdSLukas Czerner } 167bbc605cdSLukas Czerner 168bbc605cdSLukas Czerner /* 169bbc605cdSLukas Czerner * Update primary and backup superblocks using the provided function 170bbc605cdSLukas Czerner * func and argument arg. 171bbc605cdSLukas Czerner * 172bbc605cdSLukas Czerner * Only the primary superblock and at most two backup superblock 173bbc605cdSLukas Czerner * modifications are journalled; the rest is modified without journal. 174bbc605cdSLukas Czerner * This is safe because e2fsck will re-write them if there is a problem, 175bbc605cdSLukas Czerner * and we're very unlikely to ever need more than two backups. 176bbc605cdSLukas Czerner */ 177bbc605cdSLukas Czerner static 178bbc605cdSLukas Czerner int ext4_update_superblocks_fn(struct super_block *sb, 179bbc605cdSLukas Czerner ext4_update_sb_callback func, 180bbc605cdSLukas Czerner const void *arg) 181bbc605cdSLukas Czerner { 182bbc605cdSLukas Czerner handle_t *handle; 183bbc605cdSLukas Czerner ext4_group_t ngroups; 184bbc605cdSLukas Czerner unsigned int three = 1; 185bbc605cdSLukas Czerner unsigned int five = 5; 186bbc605cdSLukas Czerner unsigned int seven = 7; 187bbc605cdSLukas Czerner int err = 0, ret, i; 188bbc605cdSLukas Czerner ext4_group_t grp, primary_grp; 189bbc605cdSLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 190bbc605cdSLukas Czerner 191bbc605cdSLukas Czerner /* 192bbc605cdSLukas Czerner * We can't update superblocks while the online resize is running 193bbc605cdSLukas Czerner */ 194bbc605cdSLukas Czerner if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING, 195bbc605cdSLukas Czerner &sbi->s_ext4_flags)) { 196bbc605cdSLukas Czerner ext4_msg(sb, KERN_ERR, "Can't modify superblock while" 197bbc605cdSLukas Czerner "performing online resize"); 198bbc605cdSLukas Czerner return -EBUSY; 199bbc605cdSLukas Czerner } 200bbc605cdSLukas Czerner 201bbc605cdSLukas Czerner /* 202bbc605cdSLukas Czerner * We're only going to update primary superblock and two 203bbc605cdSLukas Czerner * backup superblocks in this transaction. 204bbc605cdSLukas Czerner */ 205bbc605cdSLukas Czerner handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 3); 206bbc605cdSLukas Czerner if (IS_ERR(handle)) { 207bbc605cdSLukas Czerner err = PTR_ERR(handle); 208bbc605cdSLukas Czerner goto out; 209bbc605cdSLukas Czerner } 210bbc605cdSLukas Czerner 211bbc605cdSLukas Czerner /* Update primary superblock */ 212bbc605cdSLukas Czerner err = ext4_update_primary_sb(sb, handle, func, arg); 213bbc605cdSLukas Czerner if (err) { 214bbc605cdSLukas Czerner ext4_msg(sb, KERN_ERR, "Failed to update primary " 215bbc605cdSLukas Czerner "superblock"); 216bbc605cdSLukas Czerner goto out_journal; 217bbc605cdSLukas Czerner } 218bbc605cdSLukas Czerner 219bbc605cdSLukas Czerner primary_grp = ext4_get_group_number(sb, sbi->s_sbh->b_blocknr); 220bbc605cdSLukas Czerner ngroups = ext4_get_groups_count(sb); 221bbc605cdSLukas Czerner 222bbc605cdSLukas Czerner /* 223bbc605cdSLukas Czerner * Update backup superblocks. We have to start from group 0 224bbc605cdSLukas Czerner * because it might not be where the primary superblock is 225bbc605cdSLukas Czerner * if the fs is mounted with -o sb=<backup_sb_block> 226bbc605cdSLukas Czerner */ 227bbc605cdSLukas Czerner i = 0; 228bbc605cdSLukas Czerner grp = 0; 229bbc605cdSLukas Czerner while (grp < ngroups) { 230bbc605cdSLukas Czerner /* Skip primary superblock */ 231bbc605cdSLukas Czerner if (grp == primary_grp) 232bbc605cdSLukas Czerner goto next_grp; 233bbc605cdSLukas Czerner 234bbc605cdSLukas Czerner ret = ext4_update_backup_sb(sb, handle, grp, func, arg); 235bbc605cdSLukas Czerner if (ret < 0) { 236bbc605cdSLukas Czerner /* Ignore bad checksum; try to update next sb */ 237bbc605cdSLukas Czerner if (ret == -EFSBADCRC) 238bbc605cdSLukas Czerner goto next_grp; 239bbc605cdSLukas Czerner err = ret; 240bbc605cdSLukas Czerner goto out_journal; 241bbc605cdSLukas Czerner } 242bbc605cdSLukas Czerner 243bbc605cdSLukas Czerner i += ret; 244bbc605cdSLukas Czerner if (handle && i > 1) { 245bbc605cdSLukas Czerner /* 246bbc605cdSLukas Czerner * We're only journalling primary superblock and 247bbc605cdSLukas Czerner * two backup superblocks; the rest is not 248bbc605cdSLukas Czerner * journalled. 249bbc605cdSLukas Czerner */ 250bbc605cdSLukas Czerner err = ext4_journal_stop(handle); 251bbc605cdSLukas Czerner if (err) 252bbc605cdSLukas Czerner goto out; 253bbc605cdSLukas Czerner handle = NULL; 254bbc605cdSLukas Czerner } 255bbc605cdSLukas Czerner next_grp: 256bbc605cdSLukas Czerner grp = ext4_list_backups(sb, &three, &five, &seven); 257bbc605cdSLukas Czerner } 258bbc605cdSLukas Czerner 259bbc605cdSLukas Czerner out_journal: 260bbc605cdSLukas Czerner if (handle) { 261bbc605cdSLukas Czerner ret = ext4_journal_stop(handle); 262bbc605cdSLukas Czerner if (ret && !err) 263bbc605cdSLukas Czerner err = ret; 264bbc605cdSLukas Czerner } 265bbc605cdSLukas Czerner out: 266bbc605cdSLukas Czerner clear_bit_unlock(EXT4_FLAGS_RESIZING, &sbi->s_ext4_flags); 267bbc605cdSLukas Czerner smp_mb__after_atomic(); 268bbc605cdSLukas Czerner return err ? err : 0; 269bbc605cdSLukas Czerner } 270bbc605cdSLukas Czerner 271919adbfeSTheodore Ts'o /* 272393d1d1dSDr. Tilmann Bubeck * Swap memory between @a and @b for @len bytes. 273393d1d1dSDr. Tilmann Bubeck * 274393d1d1dSDr. Tilmann Bubeck * @a: pointer to first memory area 275393d1d1dSDr. Tilmann Bubeck * @b: pointer to second memory area 276393d1d1dSDr. Tilmann Bubeck * @len: number of bytes to swap 277393d1d1dSDr. Tilmann Bubeck * 278393d1d1dSDr. Tilmann Bubeck */ 279393d1d1dSDr. Tilmann Bubeck static void memswap(void *a, void *b, size_t len) 280393d1d1dSDr. Tilmann Bubeck { 281393d1d1dSDr. Tilmann Bubeck unsigned char *ap, *bp; 282393d1d1dSDr. Tilmann Bubeck 283393d1d1dSDr. Tilmann Bubeck ap = (unsigned char *)a; 284393d1d1dSDr. Tilmann Bubeck bp = (unsigned char *)b; 285393d1d1dSDr. Tilmann Bubeck while (len-- > 0) { 2864b7e2db5SFabian Frederick swap(*ap, *bp); 287393d1d1dSDr. Tilmann Bubeck ap++; 288393d1d1dSDr. Tilmann Bubeck bp++; 289393d1d1dSDr. Tilmann Bubeck } 290393d1d1dSDr. Tilmann Bubeck } 291393d1d1dSDr. Tilmann Bubeck 292919adbfeSTheodore Ts'o /* 293393d1d1dSDr. Tilmann Bubeck * Swap i_data and associated attributes between @inode1 and @inode2. 294393d1d1dSDr. Tilmann Bubeck * This function is used for the primary swap between inode1 and inode2 295393d1d1dSDr. Tilmann Bubeck * and also to revert this primary swap in case of errors. 296393d1d1dSDr. Tilmann Bubeck * 297393d1d1dSDr. Tilmann Bubeck * Therefore you have to make sure, that calling this method twice 298393d1d1dSDr. Tilmann Bubeck * will revert all changes. 299393d1d1dSDr. Tilmann Bubeck * 300393d1d1dSDr. Tilmann Bubeck * @inode1: pointer to first inode 301393d1d1dSDr. Tilmann Bubeck * @inode2: pointer to second inode 302393d1d1dSDr. Tilmann Bubeck */ 303393d1d1dSDr. Tilmann Bubeck static void swap_inode_data(struct inode *inode1, struct inode *inode2) 304393d1d1dSDr. Tilmann Bubeck { 305393d1d1dSDr. Tilmann Bubeck loff_t isize; 306393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei1; 307393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei2; 308abdc644eSyangerkun unsigned long tmp; 309393d1d1dSDr. Tilmann Bubeck 310393d1d1dSDr. Tilmann Bubeck ei1 = EXT4_I(inode1); 311393d1d1dSDr. Tilmann Bubeck ei2 = EXT4_I(inode2); 312393d1d1dSDr. Tilmann Bubeck 3139c5d58fbSJeff Layton swap(inode1->i_version, inode2->i_version); 3149c5d58fbSJeff Layton swap(inode1->i_atime, inode2->i_atime); 3159c5d58fbSJeff Layton swap(inode1->i_mtime, inode2->i_mtime); 316393d1d1dSDr. Tilmann Bubeck 317393d1d1dSDr. Tilmann Bubeck memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); 318abdc644eSyangerkun tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP; 319abdc644eSyangerkun ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) | 320abdc644eSyangerkun (ei1->i_flags & ~EXT4_FL_SHOULD_SWAP); 321abdc644eSyangerkun ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP); 3229c5d58fbSJeff Layton swap(ei1->i_disksize, ei2->i_disksize); 323cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); 324cde2d7a7STheodore Ts'o ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); 325393d1d1dSDr. Tilmann Bubeck 326393d1d1dSDr. Tilmann Bubeck isize = i_size_read(inode1); 327393d1d1dSDr. Tilmann Bubeck i_size_write(inode1, i_size_read(inode2)); 328393d1d1dSDr. Tilmann Bubeck i_size_write(inode2, isize); 329393d1d1dSDr. Tilmann Bubeck } 330393d1d1dSDr. Tilmann Bubeck 3318016e29fSHarshad Shirwadkar void ext4_reset_inode_seed(struct inode *inode) 33218aded17STheodore Ts'o { 33318aded17STheodore Ts'o struct ext4_inode_info *ei = EXT4_I(inode); 33418aded17STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); 33518aded17STheodore Ts'o __le32 inum = cpu_to_le32(inode->i_ino); 33618aded17STheodore Ts'o __le32 gen = cpu_to_le32(inode->i_generation); 33718aded17STheodore Ts'o __u32 csum; 33818aded17STheodore Ts'o 33918aded17STheodore Ts'o if (!ext4_has_metadata_csum(inode->i_sb)) 34018aded17STheodore Ts'o return; 34118aded17STheodore Ts'o 34218aded17STheodore Ts'o csum = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&inum, sizeof(inum)); 34318aded17STheodore Ts'o ei->i_csum_seed = ext4_chksum(sbi, csum, (__u8 *)&gen, sizeof(gen)); 34418aded17STheodore Ts'o } 34518aded17STheodore Ts'o 346919adbfeSTheodore Ts'o /* 347393d1d1dSDr. Tilmann Bubeck * Swap the information from the given @inode and the inode 348393d1d1dSDr. Tilmann Bubeck * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other 349393d1d1dSDr. Tilmann Bubeck * important fields of the inodes. 350393d1d1dSDr. Tilmann Bubeck * 351393d1d1dSDr. Tilmann Bubeck * @sb: the super block of the filesystem 35214f3db55SChristian Brauner * @mnt_userns: user namespace of the mount the inode was found from 353393d1d1dSDr. Tilmann Bubeck * @inode: the inode to swap with EXT4_BOOT_LOADER_INO 354393d1d1dSDr. Tilmann Bubeck * 355393d1d1dSDr. Tilmann Bubeck */ 356393d1d1dSDr. Tilmann Bubeck static long swap_inode_boot_loader(struct super_block *sb, 35714f3db55SChristian Brauner struct user_namespace *mnt_userns, 358393d1d1dSDr. Tilmann Bubeck struct inode *inode) 359393d1d1dSDr. Tilmann Bubeck { 360393d1d1dSDr. Tilmann Bubeck handle_t *handle; 361393d1d1dSDr. Tilmann Bubeck int err; 362393d1d1dSDr. Tilmann Bubeck struct inode *inode_bl; 363393d1d1dSDr. Tilmann Bubeck struct ext4_inode_info *ei_bl; 364aa507b5fSyangerkun qsize_t size, size_bl, diff; 365aa507b5fSyangerkun blkcnt_t blocks; 366aa507b5fSyangerkun unsigned short bytes; 367393d1d1dSDr. Tilmann Bubeck 3688a363970STheodore Ts'o inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL); 369d8558a29STheodore Ts'o if (IS_ERR(inode_bl)) 370d8558a29STheodore Ts'o return PTR_ERR(inode_bl); 371393d1d1dSDr. Tilmann Bubeck ei_bl = EXT4_I(inode_bl); 372393d1d1dSDr. Tilmann Bubeck 373393d1d1dSDr. Tilmann Bubeck /* Protect orig inodes against a truncate and make sure, 374393d1d1dSDr. Tilmann Bubeck * that only 1 swap_inode_boot_loader is running. */ 375375e289eSJ. Bruce Fields lock_two_nondirectories(inode, inode_bl); 376393d1d1dSDr. Tilmann Bubeck 37767a11611Syangerkun if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) || 37867a11611Syangerkun IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) || 3796e589291STheodore Ts'o (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) || 38067a11611Syangerkun ext4_has_inline_data(inode)) { 38167a11611Syangerkun err = -EINVAL; 38267a11611Syangerkun goto journal_err_out; 38367a11611Syangerkun } 38467a11611Syangerkun 38567a11611Syangerkun if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) || 38614f3db55SChristian Brauner !inode_owner_or_capable(mnt_userns, inode) || 38721cb47beSChristian Brauner !capable(CAP_SYS_ADMIN)) { 38867a11611Syangerkun err = -EPERM; 38967a11611Syangerkun goto journal_err_out; 39067a11611Syangerkun } 39167a11611Syangerkun 392d4f5258eSJan Kara filemap_invalidate_lock(inode->i_mapping); 393a46c68a3Syangerkun err = filemap_write_and_wait(inode->i_mapping); 394a46c68a3Syangerkun if (err) 395a46c68a3Syangerkun goto err_out; 396a46c68a3Syangerkun 397a46c68a3Syangerkun err = filemap_write_and_wait(inode_bl->i_mapping); 398a46c68a3Syangerkun if (err) 399a46c68a3Syangerkun goto err_out; 400a46c68a3Syangerkun 401393d1d1dSDr. Tilmann Bubeck /* Wait for all existing dio workers */ 402393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode); 403393d1d1dSDr. Tilmann Bubeck inode_dio_wait(inode_bl); 404393d1d1dSDr. Tilmann Bubeck 40518aded17STheodore Ts'o truncate_inode_pages(&inode->i_data, 0); 40618aded17STheodore Ts'o truncate_inode_pages(&inode_bl->i_data, 0); 40718aded17STheodore Ts'o 408393d1d1dSDr. Tilmann Bubeck handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); 409393d1d1dSDr. Tilmann Bubeck if (IS_ERR(handle)) { 410393d1d1dSDr. Tilmann Bubeck err = -EINVAL; 411a46c68a3Syangerkun goto err_out; 412393d1d1dSDr. Tilmann Bubeck } 413e85c81baSXin Yin ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT, handle); 414393d1d1dSDr. Tilmann Bubeck 415393d1d1dSDr. Tilmann Bubeck /* Protect extent tree against block allocations via delalloc */ 416393d1d1dSDr. Tilmann Bubeck ext4_double_down_write_data_sem(inode, inode_bl); 417393d1d1dSDr. Tilmann Bubeck 418393d1d1dSDr. Tilmann Bubeck if (inode_bl->i_nlink == 0) { 419393d1d1dSDr. Tilmann Bubeck /* this inode has never been used as a BOOT_LOADER */ 420393d1d1dSDr. Tilmann Bubeck set_nlink(inode_bl, 1); 421393d1d1dSDr. Tilmann Bubeck i_uid_write(inode_bl, 0); 422393d1d1dSDr. Tilmann Bubeck i_gid_write(inode_bl, 0); 423393d1d1dSDr. Tilmann Bubeck inode_bl->i_flags = 0; 424393d1d1dSDr. Tilmann Bubeck ei_bl->i_flags = 0; 425ee73f9a5SJeff Layton inode_set_iversion(inode_bl, 1); 426393d1d1dSDr. Tilmann Bubeck i_size_write(inode_bl, 0); 427393d1d1dSDr. Tilmann Bubeck inode_bl->i_mode = S_IFREG; 428e2b911c5SDarrick J. Wong if (ext4_has_feature_extents(sb)) { 429393d1d1dSDr. Tilmann Bubeck ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); 430393d1d1dSDr. Tilmann Bubeck ext4_ext_tree_init(handle, inode_bl); 431393d1d1dSDr. Tilmann Bubeck } else 432393d1d1dSDr. Tilmann Bubeck memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); 433393d1d1dSDr. Tilmann Bubeck } 434393d1d1dSDr. Tilmann Bubeck 435aa507b5fSyangerkun err = dquot_initialize(inode); 436aa507b5fSyangerkun if (err) 437aa507b5fSyangerkun goto err_out1; 438aa507b5fSyangerkun 439aa507b5fSyangerkun size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes; 440aa507b5fSyangerkun size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes; 441aa507b5fSyangerkun diff = size - size_bl; 442393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 443393d1d1dSDr. Tilmann Bubeck 444eeca7ea1SDeepa Dinamani inode->i_ctime = inode_bl->i_ctime = current_time(inode); 445393d1d1dSDr. Tilmann Bubeck 44623253068STheodore Ts'o inode->i_generation = prandom_u32(); 44723253068STheodore Ts'o inode_bl->i_generation = prandom_u32(); 4488016e29fSHarshad Shirwadkar ext4_reset_inode_seed(inode); 4498016e29fSHarshad Shirwadkar ext4_reset_inode_seed(inode_bl); 450393d1d1dSDr. Tilmann Bubeck 45127bc446eSbrookxu ext4_discard_preallocations(inode, 0); 452393d1d1dSDr. Tilmann Bubeck 453393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode); 454393d1d1dSDr. Tilmann Bubeck if (err < 0) { 455aa507b5fSyangerkun /* No need to update quota information. */ 456393d1d1dSDr. Tilmann Bubeck ext4_warning(inode->i_sb, 457393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 458393d1d1dSDr. Tilmann Bubeck inode->i_ino, err); 459393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 460393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 46118aded17STheodore Ts'o ext4_mark_inode_dirty(handle, inode); 462aa507b5fSyangerkun goto err_out1; 463aa507b5fSyangerkun } 464aa507b5fSyangerkun 465aa507b5fSyangerkun blocks = inode_bl->i_blocks; 466aa507b5fSyangerkun bytes = inode_bl->i_bytes; 467aa507b5fSyangerkun inode_bl->i_blocks = inode->i_blocks; 468aa507b5fSyangerkun inode_bl->i_bytes = inode->i_bytes; 469393d1d1dSDr. Tilmann Bubeck err = ext4_mark_inode_dirty(handle, inode_bl); 470393d1d1dSDr. Tilmann Bubeck if (err < 0) { 471aa507b5fSyangerkun /* No need to update quota information. */ 472393d1d1dSDr. Tilmann Bubeck ext4_warning(inode_bl->i_sb, 473393d1d1dSDr. Tilmann Bubeck "couldn't mark inode #%lu dirty (err %d)", 474393d1d1dSDr. Tilmann Bubeck inode_bl->i_ino, err); 475aa507b5fSyangerkun goto revert; 476aa507b5fSyangerkun } 477aa507b5fSyangerkun 478aa507b5fSyangerkun /* Bootloader inode should not be counted into quota information. */ 479aa507b5fSyangerkun if (diff > 0) 480aa507b5fSyangerkun dquot_free_space(inode, diff); 481aa507b5fSyangerkun else 482aa507b5fSyangerkun err = dquot_alloc_space(inode, -1 * diff); 483aa507b5fSyangerkun 484aa507b5fSyangerkun if (err < 0) { 485aa507b5fSyangerkun revert: 486393d1d1dSDr. Tilmann Bubeck /* Revert all changes: */ 487aa507b5fSyangerkun inode_bl->i_blocks = blocks; 488aa507b5fSyangerkun inode_bl->i_bytes = bytes; 489393d1d1dSDr. Tilmann Bubeck swap_inode_data(inode, inode_bl); 490393d1d1dSDr. Tilmann Bubeck ext4_mark_inode_dirty(handle, inode); 49118aded17STheodore Ts'o ext4_mark_inode_dirty(handle, inode_bl); 492393d1d1dSDr. Tilmann Bubeck } 493aa507b5fSyangerkun 494aa507b5fSyangerkun err_out1: 495393d1d1dSDr. Tilmann Bubeck ext4_journal_stop(handle); 496393d1d1dSDr. Tilmann Bubeck ext4_double_up_write_data_sem(inode, inode_bl); 497393d1d1dSDr. Tilmann Bubeck 498a46c68a3Syangerkun err_out: 499d4f5258eSJan Kara filemap_invalidate_unlock(inode->i_mapping); 50030d29b11SZheng Liu journal_err_out: 501375e289eSJ. Bruce Fields unlock_two_nondirectories(inode, inode_bl); 502393d1d1dSDr. Tilmann Bubeck iput(inode_bl); 503393d1d1dSDr. Tilmann Bubeck return err; 504393d1d1dSDr. Tilmann Bubeck } 505393d1d1dSDr. Tilmann Bubeck 5062e538403SDarrick J. Wong /* 5072e538403SDarrick J. Wong * If immutable is set and we are not clearing it, we're not allowed to change 5082e538403SDarrick J. Wong * anything else in the inode. Don't error out if we're only trying to set 5092e538403SDarrick J. Wong * immutable on an immutable file. 5102e538403SDarrick J. Wong */ 5112e538403SDarrick J. Wong static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid, 5122e538403SDarrick J. Wong unsigned int flags) 5132e538403SDarrick J. Wong { 5142e538403SDarrick J. Wong struct ext4_inode_info *ei = EXT4_I(inode); 5152e538403SDarrick J. Wong unsigned int oldflags = ei->i_flags; 5162e538403SDarrick J. Wong 5172e538403SDarrick J. Wong if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL)) 5182e538403SDarrick J. Wong return 0; 5192e538403SDarrick J. Wong 5202e538403SDarrick J. Wong if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL)) 5212e538403SDarrick J. Wong return -EPERM; 5222e538403SDarrick J. Wong if (ext4_has_feature_project(inode->i_sb) && 5232e538403SDarrick J. Wong __kprojid_val(ei->i_projid) != new_projid) 5242e538403SDarrick J. Wong return -EPERM; 5252e538403SDarrick J. Wong 5262e538403SDarrick J. Wong return 0; 5272e538403SDarrick J. Wong } 5282e538403SDarrick J. Wong 529b383a73fSIra Weiny static void ext4_dax_dontcache(struct inode *inode, unsigned int flags) 530b383a73fSIra Weiny { 531b383a73fSIra Weiny struct ext4_inode_info *ei = EXT4_I(inode); 532b383a73fSIra Weiny 533b383a73fSIra Weiny if (S_ISDIR(inode->i_mode)) 534b383a73fSIra Weiny return; 535b383a73fSIra Weiny 536b383a73fSIra Weiny if (test_opt2(inode->i_sb, DAX_NEVER) || 537b383a73fSIra Weiny test_opt(inode->i_sb, DAX_ALWAYS)) 538b383a73fSIra Weiny return; 539b383a73fSIra Weiny 540b383a73fSIra Weiny if ((ei->i_flags ^ flags) & EXT4_DAX_FL) 541b383a73fSIra Weiny d_mark_dontcache(inode); 542b383a73fSIra Weiny } 543b383a73fSIra Weiny 544b383a73fSIra Weiny static bool dax_compatible(struct inode *inode, unsigned int oldflags, 545b383a73fSIra Weiny unsigned int flags) 546b383a73fSIra Weiny { 5474811d992STheodore Ts'o /* Allow the DAX flag to be changed on inline directories */ 5484811d992STheodore Ts'o if (S_ISDIR(inode->i_mode)) { 5494811d992STheodore Ts'o flags &= ~EXT4_INLINE_DATA_FL; 5504811d992STheodore Ts'o oldflags &= ~EXT4_INLINE_DATA_FL; 5514811d992STheodore Ts'o } 5524811d992STheodore Ts'o 553b383a73fSIra Weiny if (flags & EXT4_DAX_FL) { 554b383a73fSIra Weiny if ((oldflags & EXT4_DAX_MUT_EXCL) || 555b383a73fSIra Weiny ext4_test_inode_state(inode, 556b383a73fSIra Weiny EXT4_STATE_VERITY_IN_PROGRESS)) { 557b383a73fSIra Weiny return false; 558b383a73fSIra Weiny } 559b383a73fSIra Weiny } 560b383a73fSIra Weiny 561b383a73fSIra Weiny if ((flags & EXT4_DAX_MUT_EXCL) && (oldflags & EXT4_DAX_FL)) 562b383a73fSIra Weiny return false; 563b383a73fSIra Weiny 564b383a73fSIra Weiny return true; 565b383a73fSIra Weiny } 566b383a73fSIra Weiny 5679b7365fcSLi Xi static int ext4_ioctl_setflags(struct inode *inode, 5689b7365fcSLi Xi unsigned int flags) 569ac27a0ecSDave Kleikamp { 570617ba13bSMingming Cao struct ext4_inode_info *ei = EXT4_I(inode); 571ac27a0ecSDave Kleikamp handle_t *handle = NULL; 572fdde368eSAnton Protopopov int err = -EPERM, migrate = 0; 573617ba13bSMingming Cao struct ext4_iloc iloc; 57479906964STheodore Ts'o unsigned int oldflags, mask, i; 575b886ee3eSGabriel Krisman Bertazi struct super_block *sb = inode->i_sb; 576ac27a0ecSDave Kleikamp 577e47776a0SJan Kara /* Is it quota file? Do not allow user to mess with it */ 57802749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 57942a74f20SDave Hansen goto flags_out; 58042a74f20SDave Hansen 581ac27a0ecSDave Kleikamp oldflags = ei->i_flags; 582ac27a0ecSDave Kleikamp /* 583ac27a0ecSDave Kleikamp * The JOURNAL_DATA flag can only be changed by 584ac27a0ecSDave Kleikamp * the relevant capability. 585ac27a0ecSDave Kleikamp */ 586fcebc794SIra Weiny if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 58742a74f20SDave Hansen if (!capable(CAP_SYS_RESOURCE)) 58842a74f20SDave Hansen goto flags_out; 589ac27a0ecSDave Kleikamp } 590b383a73fSIra Weiny 591b383a73fSIra Weiny if (!dax_compatible(inode, oldflags, flags)) { 592b383a73fSIra Weiny err = -EOPNOTSUPP; 593b383a73fSIra Weiny goto flags_out; 594b383a73fSIra Weiny } 595b383a73fSIra Weiny 596996bb9fdSTheodore Ts'o if ((flags ^ oldflags) & EXT4_EXTENTS_FL) 5974db46fc2SAneesh Kumar K.V migrate = 1; 598ac27a0ecSDave Kleikamp 599b886ee3eSGabriel Krisman Bertazi if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) { 600b886ee3eSGabriel Krisman Bertazi if (!ext4_has_feature_casefold(sb)) { 601b886ee3eSGabriel Krisman Bertazi err = -EOPNOTSUPP; 602b886ee3eSGabriel Krisman Bertazi goto flags_out; 603b886ee3eSGabriel Krisman Bertazi } 604b886ee3eSGabriel Krisman Bertazi 605b886ee3eSGabriel Krisman Bertazi if (!S_ISDIR(inode->i_mode)) { 606b886ee3eSGabriel Krisman Bertazi err = -ENOTDIR; 607b886ee3eSGabriel Krisman Bertazi goto flags_out; 608b886ee3eSGabriel Krisman Bertazi } 609b886ee3eSGabriel Krisman Bertazi 610b886ee3eSGabriel Krisman Bertazi if (!ext4_empty_dir(inode)) { 611b886ee3eSGabriel Krisman Bertazi err = -ENOTEMPTY; 612b886ee3eSGabriel Krisman Bertazi goto flags_out; 613b886ee3eSGabriel Krisman Bertazi } 614b886ee3eSGabriel Krisman Bertazi } 615b886ee3eSGabriel Krisman Bertazi 6162e538403SDarrick J. Wong /* 6172e538403SDarrick J. Wong * Wait for all pending directio and then flush all the dirty pages 6182e538403SDarrick J. Wong * for this file. The flush marks all the pages readonly, so any 6192e538403SDarrick J. Wong * subsequent attempt to write to the file (particularly mmap pages) 6202e538403SDarrick J. Wong * will come through the filesystem and fail. 6212e538403SDarrick J. Wong */ 6222e538403SDarrick J. Wong if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) && 6232e538403SDarrick J. Wong (flags & EXT4_IMMUTABLE_FL)) { 6242e538403SDarrick J. Wong inode_dio_wait(inode); 6252e538403SDarrick J. Wong err = filemap_write_and_wait(inode->i_mapping); 6262e538403SDarrick J. Wong if (err) 6272e538403SDarrick J. Wong goto flags_out; 6282e538403SDarrick J. Wong } 6292e538403SDarrick J. Wong 6309924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 631ac27a0ecSDave Kleikamp if (IS_ERR(handle)) { 63242a74f20SDave Hansen err = PTR_ERR(handle); 63342a74f20SDave Hansen goto flags_out; 634ac27a0ecSDave Kleikamp } 635ac27a0ecSDave Kleikamp if (IS_SYNC(inode)) 6360390131bSFrank Mayhar ext4_handle_sync(handle); 637617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 638ac27a0ecSDave Kleikamp if (err) 639ac27a0ecSDave Kleikamp goto flags_err; 640ac27a0ecSDave Kleikamp 641b383a73fSIra Weiny ext4_dax_dontcache(inode, flags); 642b383a73fSIra Weiny 64379906964STheodore Ts'o for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { 64479906964STheodore Ts'o if (!(mask & EXT4_FL_USER_MODIFIABLE)) 64579906964STheodore Ts'o continue; 646f8011d93SJan Kara /* These flags get special treatment later */ 647f8011d93SJan Kara if (mask == EXT4_JOURNAL_DATA_FL || mask == EXT4_EXTENTS_FL) 648f8011d93SJan Kara continue; 64979906964STheodore Ts'o if (mask & flags) 65079906964STheodore Ts'o ext4_set_inode_flag(inode, i); 65179906964STheodore Ts'o else 65279906964STheodore Ts'o ext4_clear_inode_flag(inode, i); 65379906964STheodore Ts'o } 654ac27a0ecSDave Kleikamp 655043546e4SIra Weiny ext4_set_inode_flags(inode, false); 656043546e4SIra Weiny 657eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 658ac27a0ecSDave Kleikamp 659617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 660ac27a0ecSDave Kleikamp flags_err: 661617ba13bSMingming Cao ext4_journal_stop(handle); 66242a74f20SDave Hansen if (err) 66342a74f20SDave Hansen goto flags_out; 664ac27a0ecSDave Kleikamp 665fcebc794SIra Weiny if ((flags ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { 666e9072d85SRoss Zwisler /* 667e9072d85SRoss Zwisler * Changes to the journaling mode can cause unsafe changes to 668ff694ab6SIra Weiny * S_DAX if the inode is DAX 669e9072d85SRoss Zwisler */ 670ff694ab6SIra Weiny if (IS_DAX(inode)) { 671e9072d85SRoss Zwisler err = -EBUSY; 672e9072d85SRoss Zwisler goto flags_out; 673e9072d85SRoss Zwisler } 674e9072d85SRoss Zwisler 675fcebc794SIra Weiny err = ext4_change_inode_journal_flag(inode, 676fcebc794SIra Weiny flags & EXT4_JOURNAL_DATA_FL); 6774db46fc2SAneesh Kumar K.V if (err) 6784db46fc2SAneesh Kumar K.V goto flags_out; 679e9072d85SRoss Zwisler } 680996bb9fdSTheodore Ts'o if (migrate) { 681996bb9fdSTheodore Ts'o if (flags & EXT4_EXTENTS_FL) 6824db46fc2SAneesh Kumar K.V err = ext4_ext_migrate(inode); 683996bb9fdSTheodore Ts'o else 684996bb9fdSTheodore Ts'o err = ext4_ind_migrate(inode); 685996bb9fdSTheodore Ts'o } 686996bb9fdSTheodore Ts'o 68742a74f20SDave Hansen flags_out: 6889b7365fcSLi Xi return err; 6899b7365fcSLi Xi } 6909b7365fcSLi Xi 6919b7365fcSLi Xi #ifdef CONFIG_QUOTA 6924db5c2e6SMiklos Szeredi static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) 6939b7365fcSLi Xi { 6949b7365fcSLi Xi struct super_block *sb = inode->i_sb; 6959b7365fcSLi Xi struct ext4_inode_info *ei = EXT4_I(inode); 6969b7365fcSLi Xi int err, rc; 6979b7365fcSLi Xi handle_t *handle; 6989b7365fcSLi Xi kprojid_t kprojid; 6999b7365fcSLi Xi struct ext4_iloc iloc; 7009b7365fcSLi Xi struct ext4_inode *raw_inode; 701079788d0SWang Shilong struct dquot *transfer_to[MAXQUOTAS] = { }; 7029b7365fcSLi Xi 7030b7b7779SKaho Ng if (!ext4_has_feature_project(sb)) { 7049b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 7059b7365fcSLi Xi return -EOPNOTSUPP; 7069b7365fcSLi Xi else 7079b7365fcSLi Xi return 0; 7089b7365fcSLi Xi } 7099b7365fcSLi Xi 7109b7365fcSLi Xi if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) 7119b7365fcSLi Xi return -EOPNOTSUPP; 7129b7365fcSLi Xi 7139b7365fcSLi Xi kprojid = make_kprojid(&init_user_ns, (projid_t)projid); 7149b7365fcSLi Xi 7159b7365fcSLi Xi if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) 7169b7365fcSLi Xi return 0; 7179b7365fcSLi Xi 7189b7365fcSLi Xi err = -EPERM; 7199b7365fcSLi Xi /* Is it quota file? Do not allow user to mess with it */ 72002749a4cSTahsin Erdogan if (ext4_is_quota_file(inode)) 721dc7ac6c4SWang Shilong return err; 7229b7365fcSLi Xi 7239b7365fcSLi Xi err = ext4_get_inode_loc(inode, &iloc); 7249b7365fcSLi Xi if (err) 725dc7ac6c4SWang Shilong return err; 7269b7365fcSLi Xi 7279b7365fcSLi Xi raw_inode = ext4_raw_inode(&iloc); 7289b7365fcSLi Xi if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { 729c03b45b8SMiao Xie err = ext4_expand_extra_isize(inode, 730c03b45b8SMiao Xie EXT4_SB(sb)->s_want_extra_isize, 731c03b45b8SMiao Xie &iloc); 732c03b45b8SMiao Xie if (err) 733dc7ac6c4SWang Shilong return err; 734c03b45b8SMiao Xie } else { 7359b7365fcSLi Xi brelse(iloc.bh); 736c03b45b8SMiao Xie } 7379b7365fcSLi Xi 738182a79e0SWang Shilong err = dquot_initialize(inode); 739182a79e0SWang Shilong if (err) 740182a79e0SWang Shilong return err; 7419b7365fcSLi Xi 7429b7365fcSLi Xi handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 7439b7365fcSLi Xi EXT4_QUOTA_INIT_BLOCKS(sb) + 7449b7365fcSLi Xi EXT4_QUOTA_DEL_BLOCKS(sb) + 3); 745dc7ac6c4SWang Shilong if (IS_ERR(handle)) 746dc7ac6c4SWang Shilong return PTR_ERR(handle); 7479b7365fcSLi Xi 7489b7365fcSLi Xi err = ext4_reserve_inode_write(handle, inode, &iloc); 7499b7365fcSLi Xi if (err) 7509b7365fcSLi Xi goto out_stop; 7519b7365fcSLi Xi 7529b7365fcSLi Xi transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); 753ff0bc084SSeth Forshee if (!IS_ERR(transfer_to[PRJQUOTA])) { 7547a9ca53aSTahsin Erdogan 7557a9ca53aSTahsin Erdogan /* __dquot_transfer() calls back ext4_get_inode_usage() which 7567a9ca53aSTahsin Erdogan * counts xattr inode references. 7577a9ca53aSTahsin Erdogan */ 7587a9ca53aSTahsin Erdogan down_read(&EXT4_I(inode)->xattr_sem); 7599b7365fcSLi Xi err = __dquot_transfer(inode, transfer_to); 7607a9ca53aSTahsin Erdogan up_read(&EXT4_I(inode)->xattr_sem); 7619b7365fcSLi Xi dqput(transfer_to[PRJQUOTA]); 7629b7365fcSLi Xi if (err) 7639b7365fcSLi Xi goto out_dirty; 7649b7365fcSLi Xi } 765079788d0SWang Shilong 7669b7365fcSLi Xi EXT4_I(inode)->i_projid = kprojid; 767eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 7689b7365fcSLi Xi out_dirty: 7699b7365fcSLi Xi rc = ext4_mark_iloc_dirty(handle, inode, &iloc); 7709b7365fcSLi Xi if (!err) 7719b7365fcSLi Xi err = rc; 7729b7365fcSLi Xi out_stop: 7739b7365fcSLi Xi ext4_journal_stop(handle); 7749b7365fcSLi Xi return err; 7759b7365fcSLi Xi } 7769b7365fcSLi Xi #else 7774db5c2e6SMiklos Szeredi static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) 7789b7365fcSLi Xi { 7799b7365fcSLi Xi if (projid != EXT4_DEF_PROJID) 7809b7365fcSLi Xi return -EOPNOTSUPP; 7819b7365fcSLi Xi return 0; 7829b7365fcSLi Xi } 7839b7365fcSLi Xi #endif 7849b7365fcSLi Xi 7851a20a630SEric Biggers static int ext4_shutdown(struct super_block *sb, unsigned long arg) 786783d9485STheodore Ts'o { 787783d9485STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 788783d9485STheodore Ts'o __u32 flags; 789783d9485STheodore Ts'o 790783d9485STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 791783d9485STheodore Ts'o return -EPERM; 792783d9485STheodore Ts'o 793783d9485STheodore Ts'o if (get_user(flags, (__u32 __user *)arg)) 794783d9485STheodore Ts'o return -EFAULT; 795783d9485STheodore Ts'o 796783d9485STheodore Ts'o if (flags > EXT4_GOING_FLAGS_NOLOGFLUSH) 797783d9485STheodore Ts'o return -EINVAL; 798783d9485STheodore Ts'o 799783d9485STheodore Ts'o if (ext4_forced_shutdown(sbi)) 800783d9485STheodore Ts'o return 0; 801783d9485STheodore Ts'o 802783d9485STheodore Ts'o ext4_msg(sb, KERN_ALERT, "shut down requested (%d)", flags); 803ccf0f32aSTheodore Ts'o trace_ext4_shutdown(sb, flags); 804783d9485STheodore Ts'o 805783d9485STheodore Ts'o switch (flags) { 806783d9485STheodore Ts'o case EXT4_GOING_FLAGS_DEFAULT: 807783d9485STheodore Ts'o freeze_bdev(sb->s_bdev); 808783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 809040f04bdSChristoph Hellwig thaw_bdev(sb->s_bdev); 810783d9485STheodore Ts'o break; 811783d9485STheodore Ts'o case EXT4_GOING_FLAGS_LOGFLUSH: 812783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 813783d9485STheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) { 814783d9485STheodore Ts'o (void) ext4_force_commit(sb); 815fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 816783d9485STheodore Ts'o } 817783d9485STheodore Ts'o break; 818783d9485STheodore Ts'o case EXT4_GOING_FLAGS_NOLOGFLUSH: 819783d9485STheodore Ts'o set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); 820a6d9946bSTheodore Ts'o if (sbi->s_journal && !is_journal_aborted(sbi->s_journal)) 821fb7c0244STheodore Ts'o jbd2_journal_abort(sbi->s_journal, -ESHUTDOWN); 822783d9485STheodore Ts'o break; 823783d9485STheodore Ts'o default: 824783d9485STheodore Ts'o return -EINVAL; 825783d9485STheodore Ts'o } 826783d9485STheodore Ts'o clear_opt(sb, DISCARD); 827783d9485STheodore Ts'o return 0; 828783d9485STheodore Ts'o } 829783d9485STheodore Ts'o 8300c9ec4beSDarrick J. Wong struct getfsmap_info { 8310c9ec4beSDarrick J. Wong struct super_block *gi_sb; 8320c9ec4beSDarrick J. Wong struct fsmap_head __user *gi_data; 8330c9ec4beSDarrick J. Wong unsigned int gi_idx; 8340c9ec4beSDarrick J. Wong __u32 gi_last_flags; 8350c9ec4beSDarrick J. Wong }; 8360c9ec4beSDarrick J. Wong 8370c9ec4beSDarrick J. Wong static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv) 8380c9ec4beSDarrick J. Wong { 8390c9ec4beSDarrick J. Wong struct getfsmap_info *info = priv; 8400c9ec4beSDarrick J. Wong struct fsmap fm; 8410c9ec4beSDarrick J. Wong 8420c9ec4beSDarrick J. Wong trace_ext4_getfsmap_mapping(info->gi_sb, xfm); 8430c9ec4beSDarrick J. Wong 8440c9ec4beSDarrick J. Wong info->gi_last_flags = xfm->fmr_flags; 8450c9ec4beSDarrick J. Wong ext4_fsmap_from_internal(info->gi_sb, &fm, xfm); 8460c9ec4beSDarrick J. Wong if (copy_to_user(&info->gi_data->fmh_recs[info->gi_idx++], &fm, 8470c9ec4beSDarrick J. Wong sizeof(struct fsmap))) 8480c9ec4beSDarrick J. Wong return -EFAULT; 8490c9ec4beSDarrick J. Wong 8500c9ec4beSDarrick J. Wong return 0; 8510c9ec4beSDarrick J. Wong } 8520c9ec4beSDarrick J. Wong 8530c9ec4beSDarrick J. Wong static int ext4_ioc_getfsmap(struct super_block *sb, 8540c9ec4beSDarrick J. Wong struct fsmap_head __user *arg) 8550c9ec4beSDarrick J. Wong { 8560ba33facSTheodore Ts'o struct getfsmap_info info = { NULL }; 8570c9ec4beSDarrick J. Wong struct ext4_fsmap_head xhead = {0}; 8580c9ec4beSDarrick J. Wong struct fsmap_head head; 8590c9ec4beSDarrick J. Wong bool aborted = false; 8600c9ec4beSDarrick J. Wong int error; 8610c9ec4beSDarrick J. Wong 8620c9ec4beSDarrick J. Wong if (copy_from_user(&head, arg, sizeof(struct fsmap_head))) 8630c9ec4beSDarrick J. Wong return -EFAULT; 8640c9ec4beSDarrick J. Wong if (memchr_inv(head.fmh_reserved, 0, sizeof(head.fmh_reserved)) || 8650c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[0].fmr_reserved, 0, 8660c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[0].fmr_reserved)) || 8670c9ec4beSDarrick J. Wong memchr_inv(head.fmh_keys[1].fmr_reserved, 0, 8680c9ec4beSDarrick J. Wong sizeof(head.fmh_keys[1].fmr_reserved))) 8690c9ec4beSDarrick J. Wong return -EINVAL; 8700c9ec4beSDarrick J. Wong /* 8710c9ec4beSDarrick J. Wong * ext4 doesn't report file extents at all, so the only valid 8720c9ec4beSDarrick J. Wong * file offsets are the magic ones (all zeroes or all ones). 8730c9ec4beSDarrick J. Wong */ 8740c9ec4beSDarrick J. Wong if (head.fmh_keys[0].fmr_offset || 8750c9ec4beSDarrick J. Wong (head.fmh_keys[1].fmr_offset != 0 && 8760c9ec4beSDarrick J. Wong head.fmh_keys[1].fmr_offset != -1ULL)) 8770c9ec4beSDarrick J. Wong return -EINVAL; 8780c9ec4beSDarrick J. Wong 8790c9ec4beSDarrick J. Wong xhead.fmh_iflags = head.fmh_iflags; 8800c9ec4beSDarrick J. Wong xhead.fmh_count = head.fmh_count; 8810c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[0], &head.fmh_keys[0]); 8820c9ec4beSDarrick J. Wong ext4_fsmap_to_internal(sb, &xhead.fmh_keys[1], &head.fmh_keys[1]); 8830c9ec4beSDarrick J. Wong 8840c9ec4beSDarrick J. Wong trace_ext4_getfsmap_low_key(sb, &xhead.fmh_keys[0]); 8850c9ec4beSDarrick J. Wong trace_ext4_getfsmap_high_key(sb, &xhead.fmh_keys[1]); 8860c9ec4beSDarrick J. Wong 8870c9ec4beSDarrick J. Wong info.gi_sb = sb; 8880c9ec4beSDarrick J. Wong info.gi_data = arg; 8890c9ec4beSDarrick J. Wong error = ext4_getfsmap(sb, &xhead, ext4_getfsmap_format, &info); 8901fc57ca5SJiapeng Chong if (error == EXT4_QUERY_RANGE_ABORT) 8910c9ec4beSDarrick J. Wong aborted = true; 8921fc57ca5SJiapeng Chong else if (error) 8930c9ec4beSDarrick J. Wong return error; 8940c9ec4beSDarrick J. Wong 8950c9ec4beSDarrick J. Wong /* If we didn't abort, set the "last" flag in the last fmx */ 8960c9ec4beSDarrick J. Wong if (!aborted && info.gi_idx) { 8970c9ec4beSDarrick J. Wong info.gi_last_flags |= FMR_OF_LAST; 8980c9ec4beSDarrick J. Wong if (copy_to_user(&info.gi_data->fmh_recs[info.gi_idx - 1].fmr_flags, 8990c9ec4beSDarrick J. Wong &info.gi_last_flags, 9000c9ec4beSDarrick J. Wong sizeof(info.gi_last_flags))) 9010c9ec4beSDarrick J. Wong return -EFAULT; 9020c9ec4beSDarrick J. Wong } 9030c9ec4beSDarrick J. Wong 9040c9ec4beSDarrick J. Wong /* copy back header */ 9050c9ec4beSDarrick J. Wong head.fmh_entries = xhead.fmh_entries; 9060c9ec4beSDarrick J. Wong head.fmh_oflags = xhead.fmh_oflags; 9070c9ec4beSDarrick J. Wong if (copy_to_user(arg, &head, sizeof(struct fsmap_head))) 9080c9ec4beSDarrick J. Wong return -EFAULT; 9090c9ec4beSDarrick J. Wong 9100c9ec4beSDarrick J. Wong return 0; 9110c9ec4beSDarrick J. Wong } 9120c9ec4beSDarrick J. Wong 913e145b35bSAl Viro static long ext4_ioctl_group_add(struct file *file, 914e145b35bSAl Viro struct ext4_new_group_data *input) 915e145b35bSAl Viro { 916e145b35bSAl Viro struct super_block *sb = file_inode(file)->i_sb; 917e145b35bSAl Viro int err, err2=0; 918e145b35bSAl Viro 919e145b35bSAl Viro err = ext4_resize_begin(sb); 920e145b35bSAl Viro if (err) 921e145b35bSAl Viro return err; 922e145b35bSAl Viro 9238813587aSTheodore Ts'o if (ext4_has_feature_bigalloc(sb)) { 9248813587aSTheodore Ts'o ext4_msg(sb, KERN_ERR, 9258813587aSTheodore Ts'o "Online resizing not supported with bigalloc"); 9268813587aSTheodore Ts'o err = -EOPNOTSUPP; 9278813587aSTheodore Ts'o goto group_add_out; 9288813587aSTheodore Ts'o } 9298813587aSTheodore Ts'o 930e145b35bSAl Viro err = mnt_want_write_file(file); 931e145b35bSAl Viro if (err) 932e145b35bSAl Viro goto group_add_out; 933e145b35bSAl Viro 934e145b35bSAl Viro err = ext4_group_add(sb, input); 935e145b35bSAl Viro if (EXT4_SB(sb)->s_journal) { 936e145b35bSAl Viro jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 93701d5d965SLeah Rumancik err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 938e145b35bSAl Viro jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 939e145b35bSAl Viro } 940e145b35bSAl Viro if (err == 0) 941e145b35bSAl Viro err = err2; 942e145b35bSAl Viro mnt_drop_write_file(file); 943e145b35bSAl Viro if (!err && ext4_has_group_desc_csum(sb) && 944e145b35bSAl Viro test_opt(sb, INIT_INODE_TABLE)) 945e145b35bSAl Viro err = ext4_register_li_request(sb, input->group); 946e145b35bSAl Viro group_add_out: 947*827891a3STheodore Ts'o err2 = ext4_resize_end(sb, false); 948*827891a3STheodore Ts'o if (err == 0) 949*827891a3STheodore Ts'o err = err2; 950e145b35bSAl Viro return err; 951e145b35bSAl Viro } 952e145b35bSAl Viro 9534db5c2e6SMiklos Szeredi int ext4_fileattr_get(struct dentry *dentry, struct fileattr *fa) 954dc7ac6c4SWang Shilong { 9554db5c2e6SMiklos Szeredi struct inode *inode = d_inode(dentry); 9567b0e492eSDarrick J. Wong struct ext4_inode_info *ei = EXT4_I(inode); 9574db5c2e6SMiklos Szeredi u32 flags = ei->i_flags & EXT4_FL_USER_VISIBLE; 958dc7ac6c4SWang Shilong 9594db5c2e6SMiklos Szeredi if (S_ISREG(inode->i_mode)) 9604db5c2e6SMiklos Szeredi flags &= ~FS_PROJINHERIT_FL; 961dc7ac6c4SWang Shilong 9624db5c2e6SMiklos Szeredi fileattr_fill_flags(fa, flags); 9637b0e492eSDarrick J. Wong if (ext4_has_feature_project(inode->i_sb)) 9647b0e492eSDarrick J. Wong fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid); 9654db5c2e6SMiklos Szeredi 9664db5c2e6SMiklos Szeredi return 0; 9674db5c2e6SMiklos Szeredi } 9684db5c2e6SMiklos Szeredi 9694db5c2e6SMiklos Szeredi int ext4_fileattr_set(struct user_namespace *mnt_userns, 9704db5c2e6SMiklos Szeredi struct dentry *dentry, struct fileattr *fa) 9714db5c2e6SMiklos Szeredi { 9724db5c2e6SMiklos Szeredi struct inode *inode = d_inode(dentry); 9734db5c2e6SMiklos Szeredi u32 flags = fa->flags; 9744db5c2e6SMiklos Szeredi int err = -EOPNOTSUPP; 9754db5c2e6SMiklos Szeredi 9764db5c2e6SMiklos Szeredi if (flags & ~EXT4_FL_USER_VISIBLE) 9774db5c2e6SMiklos Szeredi goto out; 9784db5c2e6SMiklos Szeredi 9794db5c2e6SMiklos Szeredi /* 9804db5c2e6SMiklos Szeredi * chattr(1) grabs flags via GETFLAGS, modifies the result and 9814db5c2e6SMiklos Szeredi * passes that to SETFLAGS. So we cannot easily make SETFLAGS 9824db5c2e6SMiklos Szeredi * more restrictive than just silently masking off visible but 9834db5c2e6SMiklos Szeredi * not settable flags as we always did. 9844db5c2e6SMiklos Szeredi */ 9854db5c2e6SMiklos Szeredi flags &= EXT4_FL_USER_MODIFIABLE; 9864db5c2e6SMiklos Szeredi if (ext4_mask_flags(inode->i_mode, flags) != flags) 9874db5c2e6SMiklos Szeredi goto out; 9884db5c2e6SMiklos Szeredi err = ext4_ioctl_check_immutable(inode, fa->fsx_projid, flags); 9894db5c2e6SMiklos Szeredi if (err) 9904db5c2e6SMiklos Szeredi goto out; 9914db5c2e6SMiklos Szeredi err = ext4_ioctl_setflags(inode, flags); 9924db5c2e6SMiklos Szeredi if (err) 9934db5c2e6SMiklos Szeredi goto out; 9944db5c2e6SMiklos Szeredi err = ext4_ioctl_setproject(inode, fa->fsx_projid); 9954db5c2e6SMiklos Szeredi out: 9964db5c2e6SMiklos Szeredi return err; 997dc7ac6c4SWang Shilong } 998dc7ac6c4SWang Shilong 999bb5835edSTheodore Ts'o /* So that the fiemap access checks can't overflow on 32 bit machines. */ 1000bb5835edSTheodore Ts'o #define FIEMAP_MAX_EXTENTS (UINT_MAX / sizeof(struct fiemap_extent)) 1001bb5835edSTheodore Ts'o 1002bb5835edSTheodore Ts'o static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg) 1003bb5835edSTheodore Ts'o { 1004bb5835edSTheodore Ts'o struct fiemap fiemap; 1005bb5835edSTheodore Ts'o struct fiemap __user *ufiemap = (struct fiemap __user *) arg; 1006bb5835edSTheodore Ts'o struct fiemap_extent_info fieinfo = { 0, }; 1007bb5835edSTheodore Ts'o struct inode *inode = file_inode(filp); 1008bb5835edSTheodore Ts'o int error; 1009bb5835edSTheodore Ts'o 1010bb5835edSTheodore Ts'o if (copy_from_user(&fiemap, ufiemap, sizeof(fiemap))) 1011bb5835edSTheodore Ts'o return -EFAULT; 1012bb5835edSTheodore Ts'o 1013bb5835edSTheodore Ts'o if (fiemap.fm_extent_count > FIEMAP_MAX_EXTENTS) 1014bb5835edSTheodore Ts'o return -EINVAL; 1015bb5835edSTheodore Ts'o 1016bb5835edSTheodore Ts'o fieinfo.fi_flags = fiemap.fm_flags; 1017bb5835edSTheodore Ts'o fieinfo.fi_extents_max = fiemap.fm_extent_count; 1018bb5835edSTheodore Ts'o fieinfo.fi_extents_start = ufiemap->fm_extents; 1019bb5835edSTheodore Ts'o 1020328e24aeSChristoph Hellwig error = ext4_get_es_cache(inode, &fieinfo, fiemap.fm_start, 1021328e24aeSChristoph Hellwig fiemap.fm_length); 1022bb5835edSTheodore Ts'o fiemap.fm_flags = fieinfo.fi_flags; 1023bb5835edSTheodore Ts'o fiemap.fm_mapped_extents = fieinfo.fi_extents_mapped; 1024bb5835edSTheodore Ts'o if (copy_to_user(ufiemap, &fiemap, sizeof(fiemap))) 1025bb5835edSTheodore Ts'o error = -EFAULT; 1026bb5835edSTheodore Ts'o 1027bb5835edSTheodore Ts'o return error; 1028bb5835edSTheodore Ts'o } 1029bb5835edSTheodore Ts'o 1030351a0a3fSLeah Rumancik static int ext4_ioctl_checkpoint(struct file *filp, unsigned long arg) 1031351a0a3fSLeah Rumancik { 1032351a0a3fSLeah Rumancik int err = 0; 1033351a0a3fSLeah Rumancik __u32 flags = 0; 1034351a0a3fSLeah Rumancik unsigned int flush_flags = 0; 1035351a0a3fSLeah Rumancik struct super_block *sb = file_inode(filp)->i_sb; 1036351a0a3fSLeah Rumancik 1037351a0a3fSLeah Rumancik if (copy_from_user(&flags, (__u32 __user *)arg, 1038351a0a3fSLeah Rumancik sizeof(__u32))) 1039351a0a3fSLeah Rumancik return -EFAULT; 1040351a0a3fSLeah Rumancik 1041351a0a3fSLeah Rumancik if (!capable(CAP_SYS_ADMIN)) 1042351a0a3fSLeah Rumancik return -EPERM; 1043351a0a3fSLeah Rumancik 1044351a0a3fSLeah Rumancik /* check for invalid bits set */ 1045351a0a3fSLeah Rumancik if ((flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) || 1046351a0a3fSLeah Rumancik ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && 1047351a0a3fSLeah Rumancik (flags & JBD2_JOURNAL_FLUSH_ZEROOUT))) 1048351a0a3fSLeah Rumancik return -EINVAL; 1049351a0a3fSLeah Rumancik 1050351a0a3fSLeah Rumancik if (!EXT4_SB(sb)->s_journal) 1051351a0a3fSLeah Rumancik return -ENODEV; 1052351a0a3fSLeah Rumancik 105309559019STheodore Ts'o if (flags & ~EXT4_IOC_CHECKPOINT_FLAG_VALID) 1054351a0a3fSLeah Rumancik return -EINVAL; 1055351a0a3fSLeah Rumancik 105670200574SChristoph Hellwig if ((flags & JBD2_JOURNAL_FLUSH_DISCARD) && 105770200574SChristoph Hellwig !bdev_max_discard_sectors(EXT4_SB(sb)->s_journal->j_dev)) 1058351a0a3fSLeah Rumancik return -EOPNOTSUPP; 1059351a0a3fSLeah Rumancik 1060351a0a3fSLeah Rumancik if (flags & EXT4_IOC_CHECKPOINT_FLAG_DRY_RUN) 1061351a0a3fSLeah Rumancik return 0; 1062351a0a3fSLeah Rumancik 1063351a0a3fSLeah Rumancik if (flags & EXT4_IOC_CHECKPOINT_FLAG_DISCARD) 1064351a0a3fSLeah Rumancik flush_flags |= JBD2_JOURNAL_FLUSH_DISCARD; 1065351a0a3fSLeah Rumancik 1066351a0a3fSLeah Rumancik if (flags & EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT) { 1067351a0a3fSLeah Rumancik flush_flags |= JBD2_JOURNAL_FLUSH_ZEROOUT; 1068351a0a3fSLeah Rumancik pr_info_ratelimited("warning: checkpointing journal with EXT4_IOC_CHECKPOINT_FLAG_ZEROOUT can be slow"); 1069351a0a3fSLeah Rumancik } 1070351a0a3fSLeah Rumancik 1071351a0a3fSLeah Rumancik jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 1072351a0a3fSLeah Rumancik err = jbd2_journal_flush(EXT4_SB(sb)->s_journal, flush_flags); 1073351a0a3fSLeah Rumancik jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 1074351a0a3fSLeah Rumancik 1075351a0a3fSLeah Rumancik return err; 1076351a0a3fSLeah Rumancik } 1077351a0a3fSLeah Rumancik 1078bbc605cdSLukas Czerner static int ext4_ioctl_setlabel(struct file *filp, const char __user *user_label) 1079bbc605cdSLukas Czerner { 1080bbc605cdSLukas Czerner size_t len; 1081bbc605cdSLukas Czerner int ret = 0; 1082bbc605cdSLukas Czerner char new_label[EXT4_LABEL_MAX + 1]; 1083bbc605cdSLukas Czerner struct super_block *sb = file_inode(filp)->i_sb; 1084bbc605cdSLukas Czerner 1085bbc605cdSLukas Czerner if (!capable(CAP_SYS_ADMIN)) 1086bbc605cdSLukas Czerner return -EPERM; 1087bbc605cdSLukas Czerner 1088bbc605cdSLukas Czerner /* 1089bbc605cdSLukas Czerner * Copy the maximum length allowed for ext4 label with one more to 1090bbc605cdSLukas Czerner * find the required terminating null byte in order to test the 1091bbc605cdSLukas Czerner * label length. The on disk label doesn't need to be null terminated. 1092bbc605cdSLukas Czerner */ 1093bbc605cdSLukas Czerner if (copy_from_user(new_label, user_label, EXT4_LABEL_MAX + 1)) 1094bbc605cdSLukas Czerner return -EFAULT; 1095bbc605cdSLukas Czerner 1096bbc605cdSLukas Czerner len = strnlen(new_label, EXT4_LABEL_MAX + 1); 1097bbc605cdSLukas Czerner if (len > EXT4_LABEL_MAX) 1098bbc605cdSLukas Czerner return -EINVAL; 1099bbc605cdSLukas Czerner 1100bbc605cdSLukas Czerner /* 1101bbc605cdSLukas Czerner * Clear the buffer after the new label 1102bbc605cdSLukas Czerner */ 1103bbc605cdSLukas Czerner memset(new_label + len, 0, EXT4_LABEL_MAX - len); 1104bbc605cdSLukas Czerner 1105bbc605cdSLukas Czerner ret = mnt_want_write_file(filp); 1106bbc605cdSLukas Czerner if (ret) 1107bbc605cdSLukas Czerner return ret; 1108bbc605cdSLukas Czerner 1109bbc605cdSLukas Czerner ret = ext4_update_superblocks_fn(sb, ext4_sb_setlabel, new_label); 1110bbc605cdSLukas Czerner 1111bbc605cdSLukas Czerner mnt_drop_write_file(filp); 1112bbc605cdSLukas Czerner return ret; 1113bbc605cdSLukas Czerner } 1114bbc605cdSLukas Czerner 1115bbc605cdSLukas Czerner static int ext4_ioctl_getlabel(struct ext4_sb_info *sbi, char __user *user_label) 1116bbc605cdSLukas Czerner { 1117bbc605cdSLukas Czerner char label[EXT4_LABEL_MAX + 1]; 1118bbc605cdSLukas Czerner 1119bbc605cdSLukas Czerner /* 1120bbc605cdSLukas Czerner * EXT4_LABEL_MAX must always be smaller than FSLABEL_MAX because 1121bbc605cdSLukas Czerner * FSLABEL_MAX must include terminating null byte, while s_volume_name 1122bbc605cdSLukas Czerner * does not have to. 1123bbc605cdSLukas Czerner */ 1124bbc605cdSLukas Czerner BUILD_BUG_ON(EXT4_LABEL_MAX >= FSLABEL_MAX); 1125bbc605cdSLukas Czerner 1126bbc605cdSLukas Czerner memset(label, 0, sizeof(label)); 1127bbc605cdSLukas Czerner lock_buffer(sbi->s_sbh); 1128bbc605cdSLukas Czerner strncpy(label, sbi->s_es->s_volume_name, EXT4_LABEL_MAX); 1129bbc605cdSLukas Czerner unlock_buffer(sbi->s_sbh); 1130bbc605cdSLukas Czerner 1131bbc605cdSLukas Czerner if (copy_to_user(user_label, label, sizeof(label))) 1132bbc605cdSLukas Czerner return -EFAULT; 1133bbc605cdSLukas Czerner return 0; 1134bbc605cdSLukas Czerner } 1135bbc605cdSLukas Czerner 1136aa75f4d3SHarshad Shirwadkar static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 11379b7365fcSLi Xi { 11389b7365fcSLi Xi struct inode *inode = file_inode(filp); 11399b7365fcSLi Xi struct super_block *sb = inode->i_sb; 114014f3db55SChristian Brauner struct user_namespace *mnt_userns = file_mnt_user_ns(filp); 11419b7365fcSLi Xi 11429b7365fcSLi Xi ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); 11439b7365fcSLi Xi 11449b7365fcSLi Xi switch (cmd) { 11450c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 11460c9ec4beSDarrick J. Wong return ext4_ioc_getfsmap(sb, (void __user *)arg); 1147617ba13bSMingming Cao case EXT4_IOC_GETVERSION: 1148617ba13bSMingming Cao case EXT4_IOC_GETVERSION_OLD: 1149ac27a0ecSDave Kleikamp return put_user(inode->i_generation, (int __user *) arg); 1150617ba13bSMingming Cao case EXT4_IOC_SETVERSION: 1151617ba13bSMingming Cao case EXT4_IOC_SETVERSION_OLD: { 1152ac27a0ecSDave Kleikamp handle_t *handle; 1153617ba13bSMingming Cao struct ext4_iloc iloc; 1154ac27a0ecSDave Kleikamp __u32 generation; 1155ac27a0ecSDave Kleikamp int err; 1156ac27a0ecSDave Kleikamp 115714f3db55SChristian Brauner if (!inode_owner_or_capable(mnt_userns, inode)) 1158ac27a0ecSDave Kleikamp return -EPERM; 115942a74f20SDave Hansen 11609aa5d32bSDmitry Monakhov if (ext4_has_metadata_csum(inode->i_sb)) { 1161814525f4SDarrick J. Wong ext4_warning(sb, "Setting inode version is not " 1162814525f4SDarrick J. Wong "supported with metadata_csum enabled."); 1163814525f4SDarrick J. Wong return -ENOTTY; 1164814525f4SDarrick J. Wong } 1165814525f4SDarrick J. Wong 1166a561be71SAl Viro err = mnt_want_write_file(filp); 116742a74f20SDave Hansen if (err) 116842a74f20SDave Hansen return err; 116942a74f20SDave Hansen if (get_user(generation, (int __user *) arg)) { 117042a74f20SDave Hansen err = -EFAULT; 117142a74f20SDave Hansen goto setversion_out; 117242a74f20SDave Hansen } 1173ac27a0ecSDave Kleikamp 11745955102cSAl Viro inode_lock(inode); 11759924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); 117642a74f20SDave Hansen if (IS_ERR(handle)) { 117742a74f20SDave Hansen err = PTR_ERR(handle); 11786c2155b9SDjalal Harouni goto unlock_out; 117942a74f20SDave Hansen } 1180617ba13bSMingming Cao err = ext4_reserve_inode_write(handle, inode, &iloc); 1181ac27a0ecSDave Kleikamp if (err == 0) { 1182eeca7ea1SDeepa Dinamani inode->i_ctime = current_time(inode); 1183ac27a0ecSDave Kleikamp inode->i_generation = generation; 1184617ba13bSMingming Cao err = ext4_mark_iloc_dirty(handle, inode, &iloc); 1185ac27a0ecSDave Kleikamp } 1186617ba13bSMingming Cao ext4_journal_stop(handle); 11876c2155b9SDjalal Harouni 11886c2155b9SDjalal Harouni unlock_out: 11895955102cSAl Viro inode_unlock(inode); 119042a74f20SDave Hansen setversion_out: 11912a79f17eSAl Viro mnt_drop_write_file(filp); 1192ac27a0ecSDave Kleikamp return err; 1193ac27a0ecSDave Kleikamp } 1194617ba13bSMingming Cao case EXT4_IOC_GROUP_EXTEND: { 1195617ba13bSMingming Cao ext4_fsblk_t n_blocks_count; 1196ac046f1dSPeng Tao int err, err2=0; 1197ac27a0ecSDave Kleikamp 11988f82f840SYongqiang Yang err = ext4_resize_begin(sb); 11998f82f840SYongqiang Yang if (err) 12008f82f840SYongqiang Yang return err; 1201ac27a0ecSDave Kleikamp 1202014a1770SDjalal Harouni if (get_user(n_blocks_count, (__u32 __user *)arg)) { 1203014a1770SDjalal Harouni err = -EFAULT; 1204014a1770SDjalal Harouni goto group_extend_out; 1205014a1770SDjalal Harouni } 1206ac27a0ecSDave Kleikamp 12078813587aSTheodore Ts'o if (ext4_has_feature_bigalloc(sb)) { 12088813587aSTheodore Ts'o ext4_msg(sb, KERN_ERR, 12098813587aSTheodore Ts'o "Online resizing not supported with bigalloc"); 12108813587aSTheodore Ts'o err = -EOPNOTSUPP; 12118813587aSTheodore Ts'o goto group_extend_out; 12128813587aSTheodore Ts'o } 12138813587aSTheodore Ts'o 1214a561be71SAl Viro err = mnt_want_write_file(filp); 121542a74f20SDave Hansen if (err) 1216014a1770SDjalal Harouni goto group_extend_out; 121742a74f20SDave Hansen 1218617ba13bSMingming Cao err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); 1219ac046f1dSPeng Tao if (EXT4_SB(sb)->s_journal) { 1220dab291afSMingming Cao jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 122101d5d965SLeah Rumancik err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 1222dab291afSMingming Cao jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 1223ac046f1dSPeng Tao } 12247ffe1ea8SHidehiro Kawai if (err == 0) 12257ffe1ea8SHidehiro Kawai err = err2; 12262a79f17eSAl Viro mnt_drop_write_file(filp); 1227014a1770SDjalal Harouni group_extend_out: 1228*827891a3STheodore Ts'o err2 = ext4_resize_end(sb, false); 1229*827891a3STheodore Ts'o if (err == 0) 1230*827891a3STheodore Ts'o err = err2; 1231ac27a0ecSDave Kleikamp return err; 1232ac27a0ecSDave Kleikamp } 1233748de673SAkira Fujita 1234748de673SAkira Fujita case EXT4_IOC_MOVE_EXT: { 1235748de673SAkira Fujita struct move_extent me; 12362903ff01SAl Viro struct fd donor; 12372903ff01SAl Viro int err; 1238748de673SAkira Fujita 12394a58579bSAkira Fujita if (!(filp->f_mode & FMODE_READ) || 12404a58579bSAkira Fujita !(filp->f_mode & FMODE_WRITE)) 12414a58579bSAkira Fujita return -EBADF; 12424a58579bSAkira Fujita 1243748de673SAkira Fujita if (copy_from_user(&me, 1244748de673SAkira Fujita (struct move_extent __user *)arg, sizeof(me))) 1245748de673SAkira Fujita return -EFAULT; 12464a58579bSAkira Fujita me.moved_len = 0; 1247748de673SAkira Fujita 12482903ff01SAl Viro donor = fdget(me.donor_fd); 12492903ff01SAl Viro if (!donor.file) 1250748de673SAkira Fujita return -EBADF; 1251748de673SAkira Fujita 12522903ff01SAl Viro if (!(donor.file->f_mode & FMODE_WRITE)) { 12534a58579bSAkira Fujita err = -EBADF; 12544a58579bSAkira Fujita goto mext_out; 1255748de673SAkira Fujita } 1256748de673SAkira Fujita 1257e2b911c5SDarrick J. Wong if (ext4_has_feature_bigalloc(sb)) { 1258bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 1259bab08ab9STheodore Ts'o "Online defrag not supported with bigalloc"); 1260399c9b86SAl Viro err = -EOPNOTSUPP; 1261399c9b86SAl Viro goto mext_out; 126273f34a5eSRoss Zwisler } else if (IS_DAX(inode)) { 126373f34a5eSRoss Zwisler ext4_msg(sb, KERN_ERR, 126473f34a5eSRoss Zwisler "Online defrag not supported with DAX"); 126573f34a5eSRoss Zwisler err = -EOPNOTSUPP; 126673f34a5eSRoss Zwisler goto mext_out; 1267bab08ab9STheodore Ts'o } 1268bab08ab9STheodore Ts'o 1269a561be71SAl Viro err = mnt_want_write_file(filp); 12704a58579bSAkira Fujita if (err) 12714a58579bSAkira Fujita goto mext_out; 12724a58579bSAkira Fujita 12732903ff01SAl Viro err = ext4_move_extents(filp, donor.file, me.orig_start, 1274748de673SAkira Fujita me.donor_start, me.len, &me.moved_len); 12752a79f17eSAl Viro mnt_drop_write_file(filp); 1276748de673SAkira Fujita 1277c437b273SAkira Fujita if (copy_to_user((struct move_extent __user *)arg, 1278c437b273SAkira Fujita &me, sizeof(me))) 12794a58579bSAkira Fujita err = -EFAULT; 12804a58579bSAkira Fujita mext_out: 12812903ff01SAl Viro fdput(donor); 1282748de673SAkira Fujita return err; 1283748de673SAkira Fujita } 1284748de673SAkira Fujita 1285617ba13bSMingming Cao case EXT4_IOC_GROUP_ADD: { 1286617ba13bSMingming Cao struct ext4_new_group_data input; 1287ac27a0ecSDave Kleikamp 1288617ba13bSMingming Cao if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, 1289e145b35bSAl Viro sizeof(input))) 1290e145b35bSAl Viro return -EFAULT; 1291ac27a0ecSDave Kleikamp 1292e145b35bSAl Viro return ext4_ioctl_group_add(filp, &input); 1293ac27a0ecSDave Kleikamp } 1294ac27a0ecSDave Kleikamp 1295c14c6fd5SAneesh Kumar K.V case EXT4_IOC_MIGRATE: 12962a43a878SAneesh Kumar K.V { 12972a43a878SAneesh Kumar K.V int err; 129814f3db55SChristian Brauner if (!inode_owner_or_capable(mnt_userns, inode)) 12992a43a878SAneesh Kumar K.V return -EACCES; 13002a43a878SAneesh Kumar K.V 1301a561be71SAl Viro err = mnt_want_write_file(filp); 13022a43a878SAneesh Kumar K.V if (err) 13032a43a878SAneesh Kumar K.V return err; 13042a43a878SAneesh Kumar K.V /* 13052a43a878SAneesh Kumar K.V * inode_mutex prevent write and truncate on the file. 13062a43a878SAneesh Kumar K.V * Read still goes through. We take i_data_sem in 13072a43a878SAneesh Kumar K.V * ext4_ext_swap_inode_data before we switch the 13082a43a878SAneesh Kumar K.V * inode format to prevent read. 13092a43a878SAneesh Kumar K.V */ 13105955102cSAl Viro inode_lock((inode)); 13112a43a878SAneesh Kumar K.V err = ext4_ext_migrate(inode); 13125955102cSAl Viro inode_unlock((inode)); 13132a79f17eSAl Viro mnt_drop_write_file(filp); 13142a43a878SAneesh Kumar K.V return err; 13152a43a878SAneesh Kumar K.V } 1316c14c6fd5SAneesh Kumar K.V 1317ccd2506bSTheodore Ts'o case EXT4_IOC_ALLOC_DA_BLKS: 1318ccd2506bSTheodore Ts'o { 1319ccd2506bSTheodore Ts'o int err; 132014f3db55SChristian Brauner if (!inode_owner_or_capable(mnt_userns, inode)) 1321ccd2506bSTheodore Ts'o return -EACCES; 1322ccd2506bSTheodore Ts'o 1323a561be71SAl Viro err = mnt_want_write_file(filp); 1324ccd2506bSTheodore Ts'o if (err) 1325ccd2506bSTheodore Ts'o return err; 1326ccd2506bSTheodore Ts'o err = ext4_alloc_da_blocks(inode); 13272a79f17eSAl Viro mnt_drop_write_file(filp); 1328ccd2506bSTheodore Ts'o return err; 1329ccd2506bSTheodore Ts'o } 1330ccd2506bSTheodore Ts'o 1331393d1d1dSDr. Tilmann Bubeck case EXT4_IOC_SWAP_BOOT: 13323e67cfadSDmitry Monakhov { 13333e67cfadSDmitry Monakhov int err; 1334393d1d1dSDr. Tilmann Bubeck if (!(filp->f_mode & FMODE_WRITE)) 1335393d1d1dSDr. Tilmann Bubeck return -EBADF; 13363e67cfadSDmitry Monakhov err = mnt_want_write_file(filp); 13373e67cfadSDmitry Monakhov if (err) 13383e67cfadSDmitry Monakhov return err; 133914f3db55SChristian Brauner err = swap_inode_boot_loader(sb, mnt_userns, inode); 13403e67cfadSDmitry Monakhov mnt_drop_write_file(filp); 13413e67cfadSDmitry Monakhov return err; 13423e67cfadSDmitry Monakhov } 1343393d1d1dSDr. Tilmann Bubeck 134419c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: { 134519c5246dSYongqiang Yang ext4_fsblk_t n_blocks_count; 134619c5246dSYongqiang Yang int err = 0, err2 = 0; 13477f511862STheodore Ts'o ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; 134819c5246dSYongqiang Yang 134919c5246dSYongqiang Yang if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, 135019c5246dSYongqiang Yang sizeof(__u64))) { 135119c5246dSYongqiang Yang return -EFAULT; 135219c5246dSYongqiang Yang } 135319c5246dSYongqiang Yang 135419c5246dSYongqiang Yang err = ext4_resize_begin(sb); 135519c5246dSYongqiang Yang if (err) 135619c5246dSYongqiang Yang return err; 135719c5246dSYongqiang Yang 13588cae6f71SAl Viro err = mnt_want_write_file(filp); 135919c5246dSYongqiang Yang if (err) 136019c5246dSYongqiang Yang goto resizefs_out; 136119c5246dSYongqiang Yang 136219c5246dSYongqiang Yang err = ext4_resize_fs(sb, n_blocks_count); 136319c5246dSYongqiang Yang if (EXT4_SB(sb)->s_journal) { 1364e85c81baSXin Yin ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE, NULL); 136519c5246dSYongqiang Yang jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 136601d5d965SLeah Rumancik err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal, 0); 136719c5246dSYongqiang Yang jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 136819c5246dSYongqiang Yang } 136919c5246dSYongqiang Yang if (err == 0) 137019c5246dSYongqiang Yang err = err2; 13718cae6f71SAl Viro mnt_drop_write_file(filp); 1372310a997fSKirill Tkhai if (!err && (o_group < EXT4_SB(sb)->s_groups_count) && 13737f511862STheodore Ts'o ext4_has_group_desc_csum(sb) && 13747f511862STheodore Ts'o test_opt(sb, INIT_INODE_TABLE)) 13757f511862STheodore Ts'o err = ext4_register_li_request(sb, o_group); 13767f511862STheodore Ts'o 137719c5246dSYongqiang Yang resizefs_out: 1378*827891a3STheodore Ts'o err2 = ext4_resize_end(sb, true); 1379*827891a3STheodore Ts'o if (err == 0) 1380*827891a3STheodore Ts'o err = err2; 138119c5246dSYongqiang Yang return err; 138219c5246dSYongqiang Yang } 138319c5246dSYongqiang Yang 1384e681c047SLukas Czerner case FITRIM: 1385e681c047SLukas Czerner { 1386e681c047SLukas Czerner struct fstrim_range range; 1387e681c047SLukas Czerner int ret = 0; 1388e681c047SLukas Czerner 1389e681c047SLukas Czerner if (!capable(CAP_SYS_ADMIN)) 1390e681c047SLukas Czerner return -EPERM; 1391e681c047SLukas Czerner 139270200574SChristoph Hellwig if (!bdev_max_discard_sectors(sb->s_bdev)) 139341431792SLukas Czerner return -EOPNOTSUPP; 139441431792SLukas Czerner 139518915b58SDarrick J. Wong /* 139618915b58SDarrick J. Wong * We haven't replayed the journal, so we cannot use our 139718915b58SDarrick J. Wong * block-bitmap-guided storage zapping commands. 139818915b58SDarrick J. Wong */ 139918915b58SDarrick J. Wong if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb)) 140018915b58SDarrick J. Wong return -EROFS; 140118915b58SDarrick J. Wong 1402e6705f7cSH Hartley Sweeten if (copy_from_user(&range, (struct fstrim_range __user *)arg, 1403e681c047SLukas Czerner sizeof(range))) 1404e681c047SLukas Czerner return -EFAULT; 1405e681c047SLukas Czerner 1406e681c047SLukas Czerner ret = ext4_trim_fs(sb, &range); 1407e681c047SLukas Czerner if (ret < 0) 1408e681c047SLukas Czerner return ret; 1409e681c047SLukas Czerner 1410e6705f7cSH Hartley Sweeten if (copy_to_user((struct fstrim_range __user *)arg, &range, 1411e681c047SLukas Czerner sizeof(range))) 1412e681c047SLukas Czerner return -EFAULT; 1413e681c047SLukas Czerner 1414e681c047SLukas Czerner return 0; 1415e681c047SLukas Czerner } 14167869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 14177869a4a6STheodore Ts'o return ext4_ext_precache(inode); 1418e681c047SLukas Czerner 1419cb29a02dSEric Biggers case FS_IOC_SET_ENCRYPTION_POLICY: 14209a200d07SRichard Weinberger if (!ext4_has_feature_encrypt(sb)) 14219a200d07SRichard Weinberger return -EOPNOTSUPP; 1422db717d8eSEric Biggers return fscrypt_ioctl_set_policy(filp, (const void __user *)arg); 14239a200d07SRichard Weinberger 142472f63f4aSRitesh Harjani case FS_IOC_GET_ENCRYPTION_PWSALT: 142572f63f4aSRitesh Harjani return ext4_ioctl_get_encryption_pwsalt(filp, (void __user *)arg); 14269bd8212fSMichael Halcrow 1427cb29a02dSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY: 14280642ea24SChao Yu if (!ext4_has_feature_encrypt(sb)) 14290642ea24SChao Yu return -EOPNOTSUPP; 1430db717d8eSEric Biggers return fscrypt_ioctl_get_policy(filp, (void __user *)arg); 14319bd8212fSMichael Halcrow 143229b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY_EX: 143329b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 143429b3692eSEric Biggers return -EOPNOTSUPP; 143529b3692eSEric Biggers return fscrypt_ioctl_get_policy_ex(filp, (void __user *)arg); 143629b3692eSEric Biggers 143729b3692eSEric Biggers case FS_IOC_ADD_ENCRYPTION_KEY: 143829b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 143929b3692eSEric Biggers return -EOPNOTSUPP; 144029b3692eSEric Biggers return fscrypt_ioctl_add_key(filp, (void __user *)arg); 144129b3692eSEric Biggers 144229b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY: 144329b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 144429b3692eSEric Biggers return -EOPNOTSUPP; 144529b3692eSEric Biggers return fscrypt_ioctl_remove_key(filp, (void __user *)arg); 144629b3692eSEric Biggers 144729b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 144829b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 144929b3692eSEric Biggers return -EOPNOTSUPP; 145029b3692eSEric Biggers return fscrypt_ioctl_remove_key_all_users(filp, 145129b3692eSEric Biggers (void __user *)arg); 145229b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 145329b3692eSEric Biggers if (!ext4_has_feature_encrypt(sb)) 145429b3692eSEric Biggers return -EOPNOTSUPP; 145529b3692eSEric Biggers return fscrypt_ioctl_get_key_status(filp, (void __user *)arg); 145629b3692eSEric Biggers 14577ec9f3b4SEric Biggers case FS_IOC_GET_ENCRYPTION_NONCE: 14587ec9f3b4SEric Biggers if (!ext4_has_feature_encrypt(sb)) 14597ec9f3b4SEric Biggers return -EOPNOTSUPP; 14607ec9f3b4SEric Biggers return fscrypt_ioctl_get_nonce(filp, (void __user *)arg); 14617ec9f3b4SEric Biggers 1462b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 1463b0c013e2STheodore Ts'o { 146414f3db55SChristian Brauner if (!inode_owner_or_capable(mnt_userns, inode)) 1465b0c013e2STheodore Ts'o return -EACCES; 1466b0c013e2STheodore Ts'o ext4_clear_inode_es(inode); 1467b0c013e2STheodore Ts'o return 0; 1468b0c013e2STheodore Ts'o } 1469b0c013e2STheodore Ts'o 14701ad3ea6eSTheodore Ts'o case EXT4_IOC_GETSTATE: 14711ad3ea6eSTheodore Ts'o { 14721ad3ea6eSTheodore Ts'o __u32 state = 0; 14731ad3ea6eSTheodore Ts'o 14741ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_EXT_PRECACHED)) 14751ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_EXT_PRECACHED; 14761ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_NEW)) 14771ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_NEW; 14781ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_NEWENTRY)) 14791ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_NEWENTRY; 14801ad3ea6eSTheodore Ts'o if (ext4_test_inode_state(inode, EXT4_STATE_DA_ALLOC_CLOSE)) 14811ad3ea6eSTheodore Ts'o state |= EXT4_STATE_FLAG_DA_ALLOC_CLOSE; 14821ad3ea6eSTheodore Ts'o 14831ad3ea6eSTheodore Ts'o return put_user(state, (__u32 __user *) arg); 14841ad3ea6eSTheodore Ts'o } 14851ad3ea6eSTheodore Ts'o 1486bb5835edSTheodore Ts'o case EXT4_IOC_GET_ES_CACHE: 1487bb5835edSTheodore Ts'o return ext4_ioctl_get_es_cache(filp, arg); 1488bb5835edSTheodore Ts'o 1489e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 1490e9be2ac7STheodore Ts'o return ext4_shutdown(sb, arg); 1491c93d8f88SEric Biggers 1492c93d8f88SEric Biggers case FS_IOC_ENABLE_VERITY: 1493c93d8f88SEric Biggers if (!ext4_has_feature_verity(sb)) 1494c93d8f88SEric Biggers return -EOPNOTSUPP; 1495c93d8f88SEric Biggers return fsverity_ioctl_enable(filp, (const void __user *)arg); 1496c93d8f88SEric Biggers 1497c93d8f88SEric Biggers case FS_IOC_MEASURE_VERITY: 1498c93d8f88SEric Biggers if (!ext4_has_feature_verity(sb)) 1499c93d8f88SEric Biggers return -EOPNOTSUPP; 1500c93d8f88SEric Biggers return fsverity_ioctl_measure(filp, (void __user *)arg); 1501c93d8f88SEric Biggers 1502e17fe657SEric Biggers case FS_IOC_READ_VERITY_METADATA: 1503e17fe657SEric Biggers if (!ext4_has_feature_verity(sb)) 1504e17fe657SEric Biggers return -EOPNOTSUPP; 1505e17fe657SEric Biggers return fsverity_ioctl_read_metadata(filp, 1506e17fe657SEric Biggers (const void __user *)arg); 1507e17fe657SEric Biggers 1508351a0a3fSLeah Rumancik case EXT4_IOC_CHECKPOINT: 1509351a0a3fSLeah Rumancik return ext4_ioctl_checkpoint(filp, arg); 1510351a0a3fSLeah Rumancik 1511bbc605cdSLukas Czerner case FS_IOC_GETFSLABEL: 1512bbc605cdSLukas Czerner return ext4_ioctl_getlabel(EXT4_SB(sb), (void __user *)arg); 1513bbc605cdSLukas Czerner 1514bbc605cdSLukas Czerner case FS_IOC_SETFSLABEL: 1515bbc605cdSLukas Czerner return ext4_ioctl_setlabel(filp, 1516bbc605cdSLukas Czerner (const void __user *)arg); 1517bbc605cdSLukas Czerner 1518ac27a0ecSDave Kleikamp default: 1519ac27a0ecSDave Kleikamp return -ENOTTY; 1520ac27a0ecSDave Kleikamp } 1521ac27a0ecSDave Kleikamp } 1522ac27a0ecSDave Kleikamp 1523aa75f4d3SHarshad Shirwadkar long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1524aa75f4d3SHarshad Shirwadkar { 15252729cfdcSHarshad Shirwadkar return __ext4_ioctl(filp, cmd, arg); 1526aa75f4d3SHarshad Shirwadkar } 1527aa75f4d3SHarshad Shirwadkar 1528ac27a0ecSDave Kleikamp #ifdef CONFIG_COMPAT 1529617ba13bSMingming Cao long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) 1530ac27a0ecSDave Kleikamp { 1531ac27a0ecSDave Kleikamp /* These are just misnamed, they actually get/put from/to user an int */ 1532ac27a0ecSDave Kleikamp switch (cmd) { 1533617ba13bSMingming Cao case EXT4_IOC32_GETVERSION: 1534617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION; 1535ac27a0ecSDave Kleikamp break; 1536617ba13bSMingming Cao case EXT4_IOC32_SETVERSION: 1537617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION; 1538ac27a0ecSDave Kleikamp break; 1539617ba13bSMingming Cao case EXT4_IOC32_GROUP_EXTEND: 1540617ba13bSMingming Cao cmd = EXT4_IOC_GROUP_EXTEND; 1541ac27a0ecSDave Kleikamp break; 1542617ba13bSMingming Cao case EXT4_IOC32_GETVERSION_OLD: 1543617ba13bSMingming Cao cmd = EXT4_IOC_GETVERSION_OLD; 1544ac27a0ecSDave Kleikamp break; 1545617ba13bSMingming Cao case EXT4_IOC32_SETVERSION_OLD: 1546617ba13bSMingming Cao cmd = EXT4_IOC_SETVERSION_OLD; 1547ac27a0ecSDave Kleikamp break; 1548617ba13bSMingming Cao case EXT4_IOC32_GETRSVSZ: 1549617ba13bSMingming Cao cmd = EXT4_IOC_GETRSVSZ; 1550ac27a0ecSDave Kleikamp break; 1551617ba13bSMingming Cao case EXT4_IOC32_SETRSVSZ: 1552617ba13bSMingming Cao cmd = EXT4_IOC_SETRSVSZ; 1553ac27a0ecSDave Kleikamp break; 15544d92dc0fSBen Hutchings case EXT4_IOC32_GROUP_ADD: { 15554d92dc0fSBen Hutchings struct compat_ext4_new_group_input __user *uinput; 1556e145b35bSAl Viro struct ext4_new_group_data input; 15574d92dc0fSBen Hutchings int err; 15584d92dc0fSBen Hutchings 15594d92dc0fSBen Hutchings uinput = compat_ptr(arg); 15604d92dc0fSBen Hutchings err = get_user(input.group, &uinput->group); 15614d92dc0fSBen Hutchings err |= get_user(input.block_bitmap, &uinput->block_bitmap); 15624d92dc0fSBen Hutchings err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); 15634d92dc0fSBen Hutchings err |= get_user(input.inode_table, &uinput->inode_table); 15644d92dc0fSBen Hutchings err |= get_user(input.blocks_count, &uinput->blocks_count); 15654d92dc0fSBen Hutchings err |= get_user(input.reserved_blocks, 15664d92dc0fSBen Hutchings &uinput->reserved_blocks); 15674d92dc0fSBen Hutchings if (err) 15684d92dc0fSBen Hutchings return -EFAULT; 1569e145b35bSAl Viro return ext4_ioctl_group_add(file, &input); 15704d92dc0fSBen Hutchings } 1571b684b2eeSChristian Borntraeger case EXT4_IOC_MOVE_EXT: 157219c5246dSYongqiang Yang case EXT4_IOC_RESIZE_FS: 1573314999dcSArnd Bergmann case FITRIM: 15747869a4a6STheodore Ts'o case EXT4_IOC_PRECACHE_EXTENTS: 1575cb29a02dSEric Biggers case FS_IOC_SET_ENCRYPTION_POLICY: 1576cb29a02dSEric Biggers case FS_IOC_GET_ENCRYPTION_PWSALT: 1577cb29a02dSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY: 157829b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_POLICY_EX: 157929b3692eSEric Biggers case FS_IOC_ADD_ENCRYPTION_KEY: 158029b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY: 158129b3692eSEric Biggers case FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS: 158229b3692eSEric Biggers case FS_IOC_GET_ENCRYPTION_KEY_STATUS: 15837ec9f3b4SEric Biggers case FS_IOC_GET_ENCRYPTION_NONCE: 1584e9be2ac7STheodore Ts'o case EXT4_IOC_SHUTDOWN: 15850c9ec4beSDarrick J. Wong case FS_IOC_GETFSMAP: 1586c93d8f88SEric Biggers case FS_IOC_ENABLE_VERITY: 1587c93d8f88SEric Biggers case FS_IOC_MEASURE_VERITY: 1588e17fe657SEric Biggers case FS_IOC_READ_VERITY_METADATA: 1589b0c013e2STheodore Ts'o case EXT4_IOC_CLEAR_ES_CACHE: 15901ad3ea6eSTheodore Ts'o case EXT4_IOC_GETSTATE: 1591bb5835edSTheodore Ts'o case EXT4_IOC_GET_ES_CACHE: 1592351a0a3fSLeah Rumancik case EXT4_IOC_CHECKPOINT: 1593bbc605cdSLukas Czerner case FS_IOC_GETFSLABEL: 1594bbc605cdSLukas Czerner case FS_IOC_SETFSLABEL: 1595b684b2eeSChristian Borntraeger break; 1596ac27a0ecSDave Kleikamp default: 1597ac27a0ecSDave Kleikamp return -ENOIOCTLCMD; 1598ac27a0ecSDave Kleikamp } 15995cdd7b2dSAndi Kleen return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); 1600ac27a0ecSDave Kleikamp } 1601ac27a0ecSDave Kleikamp #endif 1602eb705421STheodore Ts'o 1603eb705421STheodore Ts'o static void set_overhead(struct ext4_super_block *es, const void *arg) 1604eb705421STheodore Ts'o { 1605eb705421STheodore Ts'o es->s_overhead_clusters = cpu_to_le32(*((unsigned long *) arg)); 1606eb705421STheodore Ts'o } 1607eb705421STheodore Ts'o 1608*827891a3STheodore Ts'o int ext4_update_overhead(struct super_block *sb, bool force) 1609eb705421STheodore Ts'o { 1610eb705421STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1611eb705421STheodore Ts'o 1612*827891a3STheodore Ts'o if (sb_rdonly(sb)) 1613eb705421STheodore Ts'o return 0; 1614*827891a3STheodore Ts'o if (!force && 1615*827891a3STheodore Ts'o (sbi->s_overhead == 0 || 1616*827891a3STheodore Ts'o sbi->s_overhead == le32_to_cpu(sbi->s_es->s_overhead_clusters))) 1617*827891a3STheodore Ts'o return 0; 1618eb705421STheodore Ts'o return ext4_update_superblocks_fn(sb, set_overhead, &sbi->s_overhead); 1619eb705421STheodore Ts'o } 1620