Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 1 | /* |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 2 | * linux/fs/ext4/ioctl.c |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 1993, 1994, 1995 |
| 5 | * Remy Card (card@masi.ibp.fr) |
| 6 | * Laboratoire MASI - Institut Blaise Pascal |
| 7 | * Universite Pierre et Marie Curie (Paris VI) |
| 8 | */ |
| 9 | |
| 10 | #include <linux/fs.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 11 | #include <linux/capability.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 12 | #include <linux/time.h> |
| 13 | #include <linux/compat.h> |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 14 | #include <linux/mount.h> |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 15 | #include <linux/file.h> |
Michael Halcrow | 9bd8212 | 2015-04-11 07:48:01 -0400 | [diff] [blame] | 16 | #include <linux/random.h> |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 17 | #include <linux/quotaops.h> |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 18 | #include <asm/uaccess.h> |
Christoph Hellwig | 3dcf545 | 2008-04-29 18:13:32 -0400 | [diff] [blame] | 19 | #include "ext4_jbd2.h" |
| 20 | #include "ext4.h" |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 21 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 22 | #define MAX_32_NUM ((((unsigned long long) 1) << 32) - 1) |
| 23 | |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 24 | /** |
| 25 | * Swap memory between @a and @b for @len bytes. |
| 26 | * |
| 27 | * @a: pointer to first memory area |
| 28 | * @b: pointer to second memory area |
| 29 | * @len: number of bytes to swap |
| 30 | * |
| 31 | */ |
| 32 | static void memswap(void *a, void *b, size_t len) |
| 33 | { |
| 34 | unsigned char *ap, *bp; |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 35 | |
| 36 | ap = (unsigned char *)a; |
| 37 | bp = (unsigned char *)b; |
| 38 | while (len-- > 0) { |
Fabian Frederick | 4b7e2db | 2015-06-12 23:46:33 -0400 | [diff] [blame] | 39 | swap(*ap, *bp); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 40 | ap++; |
| 41 | bp++; |
| 42 | } |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Swap i_data and associated attributes between @inode1 and @inode2. |
| 47 | * This function is used for the primary swap between inode1 and inode2 |
| 48 | * and also to revert this primary swap in case of errors. |
| 49 | * |
| 50 | * Therefore you have to make sure, that calling this method twice |
| 51 | * will revert all changes. |
| 52 | * |
| 53 | * @inode1: pointer to first inode |
| 54 | * @inode2: pointer to second inode |
| 55 | */ |
| 56 | static void swap_inode_data(struct inode *inode1, struct inode *inode2) |
| 57 | { |
| 58 | loff_t isize; |
| 59 | struct ext4_inode_info *ei1; |
| 60 | struct ext4_inode_info *ei2; |
| 61 | |
| 62 | ei1 = EXT4_I(inode1); |
| 63 | ei2 = EXT4_I(inode2); |
| 64 | |
| 65 | memswap(&inode1->i_flags, &inode2->i_flags, sizeof(inode1->i_flags)); |
| 66 | memswap(&inode1->i_version, &inode2->i_version, |
| 67 | sizeof(inode1->i_version)); |
| 68 | memswap(&inode1->i_blocks, &inode2->i_blocks, |
| 69 | sizeof(inode1->i_blocks)); |
| 70 | memswap(&inode1->i_bytes, &inode2->i_bytes, sizeof(inode1->i_bytes)); |
| 71 | memswap(&inode1->i_atime, &inode2->i_atime, sizeof(inode1->i_atime)); |
| 72 | memswap(&inode1->i_mtime, &inode2->i_mtime, sizeof(inode1->i_mtime)); |
| 73 | |
| 74 | memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data)); |
| 75 | memswap(&ei1->i_flags, &ei2->i_flags, sizeof(ei1->i_flags)); |
| 76 | memswap(&ei1->i_disksize, &ei2->i_disksize, sizeof(ei1->i_disksize)); |
Theodore Ts'o | cde2d7a | 2013-08-12 09:29:30 -0400 | [diff] [blame] | 77 | ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS); |
| 78 | ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 79 | |
| 80 | isize = i_size_read(inode1); |
| 81 | i_size_write(inode1, i_size_read(inode2)); |
| 82 | i_size_write(inode2, isize); |
| 83 | } |
| 84 | |
| 85 | /** |
| 86 | * Swap the information from the given @inode and the inode |
| 87 | * EXT4_BOOT_LOADER_INO. It will basically swap i_data and all other |
| 88 | * important fields of the inodes. |
| 89 | * |
| 90 | * @sb: the super block of the filesystem |
| 91 | * @inode: the inode to swap with EXT4_BOOT_LOADER_INO |
| 92 | * |
| 93 | */ |
| 94 | static long swap_inode_boot_loader(struct super_block *sb, |
| 95 | struct inode *inode) |
| 96 | { |
| 97 | handle_t *handle; |
| 98 | int err; |
| 99 | struct inode *inode_bl; |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 100 | struct ext4_inode_info *ei_bl; |
jon ernst | d7092ae | 2014-01-11 13:26:56 -0500 | [diff] [blame] | 101 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 102 | |
Theodore Ts'o | d8558a2 | 2014-02-17 20:44:36 -0500 | [diff] [blame] | 103 | if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode)) |
| 104 | return -EINVAL; |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 105 | |
Theodore Ts'o | d8558a2 | 2014-02-17 20:44:36 -0500 | [diff] [blame] | 106 | if (!inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) |
| 107 | return -EPERM; |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 108 | |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 109 | inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO); |
Theodore Ts'o | d8558a2 | 2014-02-17 20:44:36 -0500 | [diff] [blame] | 110 | if (IS_ERR(inode_bl)) |
| 111 | return PTR_ERR(inode_bl); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 112 | ei_bl = EXT4_I(inode_bl); |
| 113 | |
| 114 | filemap_flush(inode->i_mapping); |
| 115 | filemap_flush(inode_bl->i_mapping); |
| 116 | |
| 117 | /* Protect orig inodes against a truncate and make sure, |
| 118 | * that only 1 swap_inode_boot_loader is running. */ |
J. Bruce Fields | 375e289 | 2012-04-18 15:16:33 -0400 | [diff] [blame] | 119 | lock_two_nondirectories(inode, inode_bl); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 120 | |
| 121 | truncate_inode_pages(&inode->i_data, 0); |
| 122 | truncate_inode_pages(&inode_bl->i_data, 0); |
| 123 | |
| 124 | /* Wait for all existing dio workers */ |
| 125 | ext4_inode_block_unlocked_dio(inode); |
| 126 | ext4_inode_block_unlocked_dio(inode_bl); |
| 127 | inode_dio_wait(inode); |
| 128 | inode_dio_wait(inode_bl); |
| 129 | |
| 130 | handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2); |
| 131 | if (IS_ERR(handle)) { |
| 132 | err = -EINVAL; |
Zheng Liu | 30d29b1 | 2014-02-12 11:48:31 -0500 | [diff] [blame] | 133 | goto journal_err_out; |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | /* Protect extent tree against block allocations via delalloc */ |
| 137 | ext4_double_down_write_data_sem(inode, inode_bl); |
| 138 | |
| 139 | if (inode_bl->i_nlink == 0) { |
| 140 | /* this inode has never been used as a BOOT_LOADER */ |
| 141 | set_nlink(inode_bl, 1); |
| 142 | i_uid_write(inode_bl, 0); |
| 143 | i_gid_write(inode_bl, 0); |
| 144 | inode_bl->i_flags = 0; |
| 145 | ei_bl->i_flags = 0; |
| 146 | inode_bl->i_version = 1; |
| 147 | i_size_write(inode_bl, 0); |
| 148 | inode_bl->i_mode = S_IFREG; |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 149 | if (ext4_has_feature_extents(sb)) { |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 150 | ext4_set_inode_flag(inode_bl, EXT4_INODE_EXTENTS); |
| 151 | ext4_ext_tree_init(handle, inode_bl); |
| 152 | } else |
| 153 | memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data)); |
| 154 | } |
| 155 | |
| 156 | swap_inode_data(inode, inode_bl); |
| 157 | |
| 158 | inode->i_ctime = inode_bl->i_ctime = ext4_current_time(inode); |
| 159 | |
| 160 | spin_lock(&sbi->s_next_gen_lock); |
| 161 | inode->i_generation = sbi->s_next_generation++; |
| 162 | inode_bl->i_generation = sbi->s_next_generation++; |
| 163 | spin_unlock(&sbi->s_next_gen_lock); |
| 164 | |
| 165 | ext4_discard_preallocations(inode); |
| 166 | |
| 167 | err = ext4_mark_inode_dirty(handle, inode); |
| 168 | if (err < 0) { |
| 169 | ext4_warning(inode->i_sb, |
| 170 | "couldn't mark inode #%lu dirty (err %d)", |
| 171 | inode->i_ino, err); |
| 172 | /* Revert all changes: */ |
| 173 | swap_inode_data(inode, inode_bl); |
| 174 | } else { |
| 175 | err = ext4_mark_inode_dirty(handle, inode_bl); |
| 176 | if (err < 0) { |
| 177 | ext4_warning(inode_bl->i_sb, |
| 178 | "couldn't mark inode #%lu dirty (err %d)", |
| 179 | inode_bl->i_ino, err); |
| 180 | /* Revert all changes: */ |
| 181 | swap_inode_data(inode, inode_bl); |
| 182 | ext4_mark_inode_dirty(handle, inode); |
| 183 | } |
| 184 | } |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 185 | ext4_journal_stop(handle); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 186 | ext4_double_up_write_data_sem(inode, inode_bl); |
| 187 | |
Zheng Liu | 30d29b1 | 2014-02-12 11:48:31 -0500 | [diff] [blame] | 188 | journal_err_out: |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 189 | ext4_inode_resume_unlocked_dio(inode); |
| 190 | ext4_inode_resume_unlocked_dio(inode_bl); |
J. Bruce Fields | 375e289 | 2012-04-18 15:16:33 -0400 | [diff] [blame] | 191 | unlock_two_nondirectories(inode, inode_bl); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 192 | iput(inode_bl); |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 193 | return err; |
| 194 | } |
| 195 | |
Michael Halcrow | 9bd8212 | 2015-04-11 07:48:01 -0400 | [diff] [blame] | 196 | static int uuid_is_zero(__u8 u[16]) |
| 197 | { |
| 198 | int i; |
| 199 | |
| 200 | for (i = 0; i < 16; i++) |
| 201 | if (u[i]) |
| 202 | return 0; |
| 203 | return 1; |
| 204 | } |
| 205 | |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 206 | static int ext4_ioctl_setflags(struct inode *inode, |
| 207 | unsigned int flags) |
| 208 | { |
| 209 | struct ext4_inode_info *ei = EXT4_I(inode); |
| 210 | handle_t *handle = NULL; |
| 211 | int err = EPERM, migrate = 0; |
| 212 | struct ext4_iloc iloc; |
| 213 | unsigned int oldflags, mask, i; |
| 214 | unsigned int jflag; |
| 215 | |
| 216 | /* Is it quota file? Do not allow user to mess with it */ |
| 217 | if (IS_NOQUOTA(inode)) |
| 218 | goto flags_out; |
| 219 | |
| 220 | oldflags = ei->i_flags; |
| 221 | |
| 222 | /* The JOURNAL_DATA flag is modifiable only by root */ |
| 223 | jflag = flags & EXT4_JOURNAL_DATA_FL; |
| 224 | |
| 225 | /* |
| 226 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by |
| 227 | * the relevant capability. |
| 228 | * |
| 229 | * This test looks nicer. Thanks to Pauline Middelink |
| 230 | */ |
| 231 | if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) { |
| 232 | if (!capable(CAP_LINUX_IMMUTABLE)) |
| 233 | goto flags_out; |
| 234 | } |
| 235 | |
| 236 | /* |
| 237 | * The JOURNAL_DATA flag can only be changed by |
| 238 | * the relevant capability. |
| 239 | */ |
| 240 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) { |
| 241 | if (!capable(CAP_SYS_RESOURCE)) |
| 242 | goto flags_out; |
| 243 | } |
| 244 | if ((flags ^ oldflags) & EXT4_EXTENTS_FL) |
| 245 | migrate = 1; |
| 246 | |
| 247 | if (flags & EXT4_EOFBLOCKS_FL) { |
| 248 | /* we don't support adding EOFBLOCKS flag */ |
| 249 | if (!(oldflags & EXT4_EOFBLOCKS_FL)) { |
| 250 | err = -EOPNOTSUPP; |
| 251 | goto flags_out; |
| 252 | } |
| 253 | } else if (oldflags & EXT4_EOFBLOCKS_FL) |
| 254 | ext4_truncate(inode); |
| 255 | |
| 256 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
| 257 | if (IS_ERR(handle)) { |
| 258 | err = PTR_ERR(handle); |
| 259 | goto flags_out; |
| 260 | } |
| 261 | if (IS_SYNC(inode)) |
| 262 | ext4_handle_sync(handle); |
| 263 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
| 264 | if (err) |
| 265 | goto flags_err; |
| 266 | |
| 267 | for (i = 0, mask = 1; i < 32; i++, mask <<= 1) { |
| 268 | if (!(mask & EXT4_FL_USER_MODIFIABLE)) |
| 269 | continue; |
| 270 | if (mask & flags) |
| 271 | ext4_set_inode_flag(inode, i); |
| 272 | else |
| 273 | ext4_clear_inode_flag(inode, i); |
| 274 | } |
| 275 | |
| 276 | ext4_set_inode_flags(inode); |
| 277 | inode->i_ctime = ext4_current_time(inode); |
| 278 | |
| 279 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
| 280 | flags_err: |
| 281 | ext4_journal_stop(handle); |
| 282 | if (err) |
| 283 | goto flags_out; |
| 284 | |
| 285 | if ((jflag ^ oldflags) & (EXT4_JOURNAL_DATA_FL)) |
| 286 | err = ext4_change_inode_journal_flag(inode, jflag); |
| 287 | if (err) |
| 288 | goto flags_out; |
| 289 | if (migrate) { |
| 290 | if (flags & EXT4_EXTENTS_FL) |
| 291 | err = ext4_ext_migrate(inode); |
| 292 | else |
| 293 | err = ext4_ind_migrate(inode); |
| 294 | } |
| 295 | |
| 296 | flags_out: |
| 297 | return err; |
| 298 | } |
| 299 | |
| 300 | #ifdef CONFIG_QUOTA |
| 301 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) |
| 302 | { |
| 303 | struct inode *inode = file_inode(filp); |
| 304 | struct super_block *sb = inode->i_sb; |
| 305 | struct ext4_inode_info *ei = EXT4_I(inode); |
| 306 | int err, rc; |
| 307 | handle_t *handle; |
| 308 | kprojid_t kprojid; |
| 309 | struct ext4_iloc iloc; |
| 310 | struct ext4_inode *raw_inode; |
| 311 | |
| 312 | if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, |
| 313 | EXT4_FEATURE_RO_COMPAT_PROJECT)) { |
| 314 | if (projid != EXT4_DEF_PROJID) |
| 315 | return -EOPNOTSUPP; |
| 316 | else |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | if (EXT4_INODE_SIZE(sb) <= EXT4_GOOD_OLD_INODE_SIZE) |
| 321 | return -EOPNOTSUPP; |
| 322 | |
| 323 | kprojid = make_kprojid(&init_user_ns, (projid_t)projid); |
| 324 | |
| 325 | if (projid_eq(kprojid, EXT4_I(inode)->i_projid)) |
| 326 | return 0; |
| 327 | |
| 328 | err = mnt_want_write_file(filp); |
| 329 | if (err) |
| 330 | return err; |
| 331 | |
| 332 | err = -EPERM; |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 333 | inode_lock(inode); |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 334 | /* Is it quota file? Do not allow user to mess with it */ |
| 335 | if (IS_NOQUOTA(inode)) |
| 336 | goto out_unlock; |
| 337 | |
| 338 | err = ext4_get_inode_loc(inode, &iloc); |
| 339 | if (err) |
| 340 | goto out_unlock; |
| 341 | |
| 342 | raw_inode = ext4_raw_inode(&iloc); |
| 343 | if (!EXT4_FITS_IN_INODE(raw_inode, ei, i_projid)) { |
| 344 | err = -EOVERFLOW; |
| 345 | brelse(iloc.bh); |
| 346 | goto out_unlock; |
| 347 | } |
| 348 | brelse(iloc.bh); |
| 349 | |
| 350 | dquot_initialize(inode); |
| 351 | |
| 352 | handle = ext4_journal_start(inode, EXT4_HT_QUOTA, |
| 353 | EXT4_QUOTA_INIT_BLOCKS(sb) + |
| 354 | EXT4_QUOTA_DEL_BLOCKS(sb) + 3); |
| 355 | if (IS_ERR(handle)) { |
| 356 | err = PTR_ERR(handle); |
| 357 | goto out_unlock; |
| 358 | } |
| 359 | |
| 360 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
| 361 | if (err) |
| 362 | goto out_stop; |
| 363 | |
| 364 | if (sb_has_quota_limits_enabled(sb, PRJQUOTA)) { |
| 365 | struct dquot *transfer_to[MAXQUOTAS] = { }; |
| 366 | |
| 367 | transfer_to[PRJQUOTA] = dqget(sb, make_kqid_projid(kprojid)); |
| 368 | if (transfer_to[PRJQUOTA]) { |
| 369 | err = __dquot_transfer(inode, transfer_to); |
| 370 | dqput(transfer_to[PRJQUOTA]); |
| 371 | if (err) |
| 372 | goto out_dirty; |
| 373 | } |
| 374 | } |
| 375 | EXT4_I(inode)->i_projid = kprojid; |
| 376 | inode->i_ctime = ext4_current_time(inode); |
| 377 | out_dirty: |
| 378 | rc = ext4_mark_iloc_dirty(handle, inode, &iloc); |
| 379 | if (!err) |
| 380 | err = rc; |
| 381 | out_stop: |
| 382 | ext4_journal_stop(handle); |
| 383 | out_unlock: |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 384 | inode_unlock(inode); |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 385 | mnt_drop_write_file(filp); |
| 386 | return err; |
| 387 | } |
| 388 | #else |
| 389 | static int ext4_ioctl_setproject(struct file *filp, __u32 projid) |
| 390 | { |
| 391 | if (projid != EXT4_DEF_PROJID) |
| 392 | return -EOPNOTSUPP; |
| 393 | return 0; |
| 394 | } |
| 395 | #endif |
| 396 | |
| 397 | /* Transfer internal flags to xflags */ |
| 398 | static inline __u32 ext4_iflags_to_xflags(unsigned long iflags) |
| 399 | { |
| 400 | __u32 xflags = 0; |
| 401 | |
| 402 | if (iflags & EXT4_SYNC_FL) |
| 403 | xflags |= FS_XFLAG_SYNC; |
| 404 | if (iflags & EXT4_IMMUTABLE_FL) |
| 405 | xflags |= FS_XFLAG_IMMUTABLE; |
| 406 | if (iflags & EXT4_APPEND_FL) |
| 407 | xflags |= FS_XFLAG_APPEND; |
| 408 | if (iflags & EXT4_NODUMP_FL) |
| 409 | xflags |= FS_XFLAG_NODUMP; |
| 410 | if (iflags & EXT4_NOATIME_FL) |
| 411 | xflags |= FS_XFLAG_NOATIME; |
| 412 | if (iflags & EXT4_PROJINHERIT_FL) |
| 413 | xflags |= FS_XFLAG_PROJINHERIT; |
| 414 | return xflags; |
| 415 | } |
| 416 | |
| 417 | /* Transfer xflags flags to internal */ |
| 418 | static inline unsigned long ext4_xflags_to_iflags(__u32 xflags) |
| 419 | { |
| 420 | unsigned long iflags = 0; |
| 421 | |
| 422 | if (xflags & FS_XFLAG_SYNC) |
| 423 | iflags |= EXT4_SYNC_FL; |
| 424 | if (xflags & FS_XFLAG_IMMUTABLE) |
| 425 | iflags |= EXT4_IMMUTABLE_FL; |
| 426 | if (xflags & FS_XFLAG_APPEND) |
| 427 | iflags |= EXT4_APPEND_FL; |
| 428 | if (xflags & FS_XFLAG_NODUMP) |
| 429 | iflags |= EXT4_NODUMP_FL; |
| 430 | if (xflags & FS_XFLAG_NOATIME) |
| 431 | iflags |= EXT4_NOATIME_FL; |
| 432 | if (xflags & FS_XFLAG_PROJINHERIT) |
| 433 | iflags |= EXT4_PROJINHERIT_FL; |
| 434 | |
| 435 | return iflags; |
| 436 | } |
| 437 | |
Andi Kleen | 5cdd7b2 | 2008-04-29 22:03:54 -0400 | [diff] [blame] | 438 | long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 439 | { |
Al Viro | 496ad9a | 2013-01-23 17:07:38 -0500 | [diff] [blame] | 440 | struct inode *inode = file_inode(filp); |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 441 | struct super_block *sb = inode->i_sb; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 442 | struct ext4_inode_info *ei = EXT4_I(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 443 | unsigned int flags; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 444 | |
Theodore Ts'o | af5bc92 | 2008-09-08 22:25:24 -0400 | [diff] [blame] | 445 | ext4_debug("cmd = %u, arg = %lu\n", cmd, arg); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 446 | |
| 447 | switch (cmd) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 448 | case EXT4_IOC_GETFLAGS: |
Jan Kara | ff9ddf7 | 2007-07-18 09:24:20 -0400 | [diff] [blame] | 449 | ext4_get_inode_flags(ei); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 450 | flags = ei->i_flags & EXT4_FL_USER_VISIBLE; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 451 | return put_user(flags, (int __user *) arg); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 452 | case EXT4_IOC_SETFLAGS: { |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 453 | int err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 454 | |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 455 | if (!inode_owner_or_capable(inode)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 456 | return -EACCES; |
| 457 | |
| 458 | if (get_user(flags, (int __user *) arg)) |
| 459 | return -EFAULT; |
| 460 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 461 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 462 | if (err) |
| 463 | return err; |
| 464 | |
Duane Griffin | 2dc6b0d | 2009-02-15 18:09:20 -0500 | [diff] [blame] | 465 | flags = ext4_mask_flags(inode->i_mode, flags); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 466 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 467 | inode_lock(inode); |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 468 | err = ext4_ioctl_setflags(inode, flags); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 469 | inode_unlock(inode); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 470 | mnt_drop_write_file(filp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 471 | return err; |
| 472 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 473 | case EXT4_IOC_GETVERSION: |
| 474 | case EXT4_IOC_GETVERSION_OLD: |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 475 | return put_user(inode->i_generation, (int __user *) arg); |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 476 | case EXT4_IOC_SETVERSION: |
| 477 | case EXT4_IOC_SETVERSION_OLD: { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 478 | handle_t *handle; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 479 | struct ext4_iloc iloc; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 480 | __u32 generation; |
| 481 | int err; |
| 482 | |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 483 | if (!inode_owner_or_capable(inode)) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 484 | return -EPERM; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 485 | |
Dmitry Monakhov | 9aa5d32 | 2014-10-13 03:36:16 -0400 | [diff] [blame] | 486 | if (ext4_has_metadata_csum(inode->i_sb)) { |
Darrick J. Wong | 814525f | 2012-04-29 18:31:10 -0400 | [diff] [blame] | 487 | ext4_warning(sb, "Setting inode version is not " |
| 488 | "supported with metadata_csum enabled."); |
| 489 | return -ENOTTY; |
| 490 | } |
| 491 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 492 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 493 | if (err) |
| 494 | return err; |
| 495 | if (get_user(generation, (int __user *) arg)) { |
| 496 | err = -EFAULT; |
| 497 | goto setversion_out; |
| 498 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 499 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 500 | inode_lock(inode); |
Theodore Ts'o | 9924a92 | 2013-02-08 21:59:22 -0500 | [diff] [blame] | 501 | handle = ext4_journal_start(inode, EXT4_HT_INODE, 1); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 502 | if (IS_ERR(handle)) { |
| 503 | err = PTR_ERR(handle); |
Djalal Harouni | 6c2155b | 2012-01-03 02:31:52 +0100 | [diff] [blame] | 504 | goto unlock_out; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 505 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 506 | err = ext4_reserve_inode_write(handle, inode, &iloc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 507 | if (err == 0) { |
Kalpak Shah | ef7f383 | 2007-07-18 09:15:20 -0400 | [diff] [blame] | 508 | inode->i_ctime = ext4_current_time(inode); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 509 | inode->i_generation = generation; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 510 | err = ext4_mark_iloc_dirty(handle, inode, &iloc); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 511 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 512 | ext4_journal_stop(handle); |
Djalal Harouni | 6c2155b | 2012-01-03 02:31:52 +0100 | [diff] [blame] | 513 | |
| 514 | unlock_out: |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 515 | inode_unlock(inode); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 516 | setversion_out: |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 517 | mnt_drop_write_file(filp); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 518 | return err; |
| 519 | } |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 520 | case EXT4_IOC_GROUP_EXTEND: { |
| 521 | ext4_fsblk_t n_blocks_count; |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 522 | int err, err2=0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 523 | |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 524 | err = ext4_resize_begin(sb); |
| 525 | if (err) |
| 526 | return err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 527 | |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 528 | if (get_user(n_blocks_count, (__u32 __user *)arg)) { |
| 529 | err = -EFAULT; |
| 530 | goto group_extend_out; |
| 531 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 532 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 533 | if (ext4_has_feature_bigalloc(sb)) { |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 534 | ext4_msg(sb, KERN_ERR, |
| 535 | "Online resizing not supported with bigalloc"); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 536 | err = -EOPNOTSUPP; |
| 537 | goto group_extend_out; |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 538 | } |
| 539 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 540 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 541 | if (err) |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 542 | goto group_extend_out; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 543 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 544 | err = ext4_group_extend(sb, EXT4_SB(sb)->s_es, n_blocks_count); |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 545 | if (EXT4_SB(sb)->s_journal) { |
| 546 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
| 547 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
| 548 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 549 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 550 | if (err == 0) |
| 551 | err = err2; |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 552 | mnt_drop_write_file(filp); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 553 | group_extend_out: |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 554 | ext4_resize_end(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 555 | return err; |
| 556 | } |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 557 | |
| 558 | case EXT4_IOC_MOVE_EXT: { |
| 559 | struct move_extent me; |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 560 | struct fd donor; |
| 561 | int err; |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 562 | |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 563 | if (!(filp->f_mode & FMODE_READ) || |
| 564 | !(filp->f_mode & FMODE_WRITE)) |
| 565 | return -EBADF; |
| 566 | |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 567 | if (copy_from_user(&me, |
| 568 | (struct move_extent __user *)arg, sizeof(me))) |
| 569 | return -EFAULT; |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 570 | me.moved_len = 0; |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 571 | |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 572 | donor = fdget(me.donor_fd); |
| 573 | if (!donor.file) |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 574 | return -EBADF; |
| 575 | |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 576 | if (!(donor.file->f_mode & FMODE_WRITE)) { |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 577 | err = -EBADF; |
| 578 | goto mext_out; |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 579 | } |
| 580 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 581 | if (ext4_has_feature_bigalloc(sb)) { |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 582 | ext4_msg(sb, KERN_ERR, |
| 583 | "Online defrag not supported with bigalloc"); |
Al Viro | 399c9b8 | 2012-08-26 21:00:03 -0400 | [diff] [blame] | 584 | err = -EOPNOTSUPP; |
| 585 | goto mext_out; |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 586 | } |
| 587 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 588 | err = mnt_want_write_file(filp); |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 589 | if (err) |
| 590 | goto mext_out; |
| 591 | |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 592 | err = ext4_move_extents(filp, donor.file, me.orig_start, |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 593 | me.donor_start, me.len, &me.moved_len); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 594 | mnt_drop_write_file(filp); |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 595 | |
Theodore Ts'o | 60e6679 | 2010-05-17 07:00:00 -0400 | [diff] [blame] | 596 | if (copy_to_user((struct move_extent __user *)arg, |
Akira Fujita | c437b27 | 2010-03-04 00:39:24 -0500 | [diff] [blame] | 597 | &me, sizeof(me))) |
Akira Fujita | 4a58579 | 2009-12-06 23:38:31 -0500 | [diff] [blame] | 598 | err = -EFAULT; |
| 599 | mext_out: |
Al Viro | 2903ff0 | 2012-08-28 12:52:22 -0400 | [diff] [blame] | 600 | fdput(donor); |
Akira Fujita | 748de67 | 2009-06-17 19:24:03 -0400 | [diff] [blame] | 601 | return err; |
| 602 | } |
| 603 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 604 | case EXT4_IOC_GROUP_ADD: { |
| 605 | struct ext4_new_group_data input; |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 606 | int err, err2=0; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 607 | |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 608 | err = ext4_resize_begin(sb); |
| 609 | if (err) |
| 610 | return err; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 611 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 612 | if (copy_from_user(&input, (struct ext4_new_group_input __user *)arg, |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 613 | sizeof(input))) { |
| 614 | err = -EFAULT; |
| 615 | goto group_add_out; |
| 616 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 617 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 618 | if (ext4_has_feature_bigalloc(sb)) { |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 619 | ext4_msg(sb, KERN_ERR, |
| 620 | "Online resizing not supported with bigalloc"); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 621 | err = -EOPNOTSUPP; |
| 622 | goto group_add_out; |
Theodore Ts'o | bab08ab | 2011-09-09 18:36:51 -0400 | [diff] [blame] | 623 | } |
| 624 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 625 | err = mnt_want_write_file(filp); |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 626 | if (err) |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 627 | goto group_add_out; |
Dave Hansen | 42a74f2 | 2008-02-15 14:37:46 -0800 | [diff] [blame] | 628 | |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 629 | err = ext4_group_add(sb, &input); |
Peng Tao | ac046f1 | 2009-07-13 09:30:17 -0400 | [diff] [blame] | 630 | if (EXT4_SB(sb)->s_journal) { |
| 631 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
| 632 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
| 633 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 634 | } |
Hidehiro Kawai | 7ffe1ea | 2008-10-10 20:29:21 -0400 | [diff] [blame] | 635 | if (err == 0) |
| 636 | err = err2; |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 637 | mnt_drop_write_file(filp); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 638 | if (!err && ext4_has_group_desc_csum(sb) && |
| 639 | test_opt(sb, INIT_INODE_TABLE)) |
| 640 | err = ext4_register_li_request(sb, input.group); |
Djalal Harouni | 014a177 | 2012-01-04 17:09:52 -0500 | [diff] [blame] | 641 | group_add_out: |
Yongqiang Yang | 8f82f84 | 2011-07-26 21:35:44 -0400 | [diff] [blame] | 642 | ext4_resize_end(sb); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 643 | return err; |
| 644 | } |
| 645 | |
Aneesh Kumar K.V | c14c6fd | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 646 | case EXT4_IOC_MIGRATE: |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 647 | { |
| 648 | int err; |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 649 | if (!inode_owner_or_capable(inode)) |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 650 | return -EACCES; |
| 651 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 652 | err = mnt_want_write_file(filp); |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 653 | if (err) |
| 654 | return err; |
| 655 | /* |
| 656 | * inode_mutex prevent write and truncate on the file. |
| 657 | * Read still goes through. We take i_data_sem in |
| 658 | * ext4_ext_swap_inode_data before we switch the |
| 659 | * inode format to prevent read. |
| 660 | */ |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 661 | inode_lock((inode)); |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 662 | err = ext4_ext_migrate(inode); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 663 | inode_unlock((inode)); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 664 | mnt_drop_write_file(filp); |
Aneesh Kumar K.V | 2a43a87 | 2008-09-13 12:52:26 -0400 | [diff] [blame] | 665 | return err; |
| 666 | } |
Aneesh Kumar K.V | c14c6fd | 2008-01-28 23:58:26 -0500 | [diff] [blame] | 667 | |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 668 | case EXT4_IOC_ALLOC_DA_BLKS: |
| 669 | { |
| 670 | int err; |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 671 | if (!inode_owner_or_capable(inode)) |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 672 | return -EACCES; |
| 673 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 674 | err = mnt_want_write_file(filp); |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 675 | if (err) |
| 676 | return err; |
| 677 | err = ext4_alloc_da_blocks(inode); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 678 | mnt_drop_write_file(filp); |
Theodore Ts'o | ccd2506 | 2009-02-26 01:04:07 -0500 | [diff] [blame] | 679 | return err; |
| 680 | } |
| 681 | |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 682 | case EXT4_IOC_SWAP_BOOT: |
Dmitry Monakhov | 3e67cfad2 | 2014-10-03 12:47:23 -0400 | [diff] [blame] | 683 | { |
| 684 | int err; |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 685 | if (!(filp->f_mode & FMODE_WRITE)) |
| 686 | return -EBADF; |
Dmitry Monakhov | 3e67cfad2 | 2014-10-03 12:47:23 -0400 | [diff] [blame] | 687 | err = mnt_want_write_file(filp); |
| 688 | if (err) |
| 689 | return err; |
| 690 | err = swap_inode_boot_loader(sb, inode); |
| 691 | mnt_drop_write_file(filp); |
| 692 | return err; |
| 693 | } |
Dr. Tilmann Bubeck | 393d1d1 | 2013-04-08 12:54:05 -0400 | [diff] [blame] | 694 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 695 | case EXT4_IOC_RESIZE_FS: { |
| 696 | ext4_fsblk_t n_blocks_count; |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 697 | int err = 0, err2 = 0; |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 698 | ext4_group_t o_group = EXT4_SB(sb)->s_groups_count; |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 699 | |
Darrick J. Wong | e2b911c | 2015-10-17 16:18:43 -0400 | [diff] [blame] | 700 | if (ext4_has_feature_bigalloc(sb)) { |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 701 | ext4_msg(sb, KERN_ERR, |
| 702 | "Online resizing not (yet) supported with bigalloc"); |
| 703 | return -EOPNOTSUPP; |
| 704 | } |
| 705 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 706 | if (copy_from_user(&n_blocks_count, (__u64 __user *)arg, |
| 707 | sizeof(__u64))) { |
| 708 | return -EFAULT; |
| 709 | } |
| 710 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 711 | err = ext4_resize_begin(sb); |
| 712 | if (err) |
| 713 | return err; |
| 714 | |
Al Viro | 8cae6f7 | 2012-07-19 11:19:07 +0400 | [diff] [blame] | 715 | err = mnt_want_write_file(filp); |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 716 | if (err) |
| 717 | goto resizefs_out; |
| 718 | |
| 719 | err = ext4_resize_fs(sb, n_blocks_count); |
| 720 | if (EXT4_SB(sb)->s_journal) { |
| 721 | jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); |
| 722 | err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal); |
| 723 | jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); |
| 724 | } |
| 725 | if (err == 0) |
| 726 | err = err2; |
Al Viro | 8cae6f7 | 2012-07-19 11:19:07 +0400 | [diff] [blame] | 727 | mnt_drop_write_file(filp); |
Theodore Ts'o | 7f51186 | 2013-01-13 08:41:45 -0500 | [diff] [blame] | 728 | if (!err && (o_group > EXT4_SB(sb)->s_groups_count) && |
| 729 | ext4_has_group_desc_csum(sb) && |
| 730 | test_opt(sb, INIT_INODE_TABLE)) |
| 731 | err = ext4_register_li_request(sb, o_group); |
| 732 | |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 733 | resizefs_out: |
| 734 | ext4_resize_end(sb); |
| 735 | return err; |
| 736 | } |
| 737 | |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 738 | case FITRIM: |
| 739 | { |
Lukas Czerner | 4143179 | 2011-02-23 12:42:32 -0500 | [diff] [blame] | 740 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 741 | struct fstrim_range range; |
| 742 | int ret = 0; |
| 743 | |
| 744 | if (!capable(CAP_SYS_ADMIN)) |
| 745 | return -EPERM; |
| 746 | |
Lukas Czerner | 4143179 | 2011-02-23 12:42:32 -0500 | [diff] [blame] | 747 | if (!blk_queue_discard(q)) |
| 748 | return -EOPNOTSUPP; |
| 749 | |
H Hartley Sweeten | e6705f7 | 2011-10-18 10:59:51 -0400 | [diff] [blame] | 750 | if (copy_from_user(&range, (struct fstrim_range __user *)arg, |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 751 | sizeof(range))) |
| 752 | return -EFAULT; |
| 753 | |
Lukas Czerner | 5c2ed62 | 2011-02-23 17:49:51 -0500 | [diff] [blame] | 754 | range.minlen = max((unsigned int)range.minlen, |
| 755 | q->limits.discard_granularity); |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 756 | ret = ext4_trim_fs(sb, &range); |
| 757 | if (ret < 0) |
| 758 | return ret; |
| 759 | |
H Hartley Sweeten | e6705f7 | 2011-10-18 10:59:51 -0400 | [diff] [blame] | 760 | if (copy_to_user((struct fstrim_range __user *)arg, &range, |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 761 | sizeof(range))) |
| 762 | return -EFAULT; |
| 763 | |
| 764 | return 0; |
| 765 | } |
Theodore Ts'o | 7869a4a | 2013-08-16 22:05:14 -0400 | [diff] [blame] | 766 | case EXT4_IOC_PRECACHE_EXTENTS: |
| 767 | return ext4_ext_precache(inode); |
Michael Halcrow | 9bd8212 | 2015-04-11 07:48:01 -0400 | [diff] [blame] | 768 | case EXT4_IOC_SET_ENCRYPTION_POLICY: { |
| 769 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 770 | struct ext4_encryption_policy policy; |
| 771 | int err = 0; |
Lukas Czerner | e681c04 | 2010-11-19 21:47:07 -0500 | [diff] [blame] | 772 | |
Michael Halcrow | 9bd8212 | 2015-04-11 07:48:01 -0400 | [diff] [blame] | 773 | if (copy_from_user(&policy, |
| 774 | (struct ext4_encryption_policy __user *)arg, |
| 775 | sizeof(policy))) { |
| 776 | err = -EFAULT; |
| 777 | goto encryption_policy_out; |
| 778 | } |
| 779 | |
| 780 | err = ext4_process_policy(&policy, inode); |
| 781 | encryption_policy_out: |
| 782 | return err; |
| 783 | #else |
| 784 | return -EOPNOTSUPP; |
| 785 | #endif |
| 786 | } |
| 787 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: { |
| 788 | int err, err2; |
| 789 | struct ext4_sb_info *sbi = EXT4_SB(sb); |
| 790 | handle_t *handle; |
| 791 | |
| 792 | if (!ext4_sb_has_crypto(sb)) |
| 793 | return -EOPNOTSUPP; |
| 794 | if (uuid_is_zero(sbi->s_es->s_encrypt_pw_salt)) { |
| 795 | err = mnt_want_write_file(filp); |
| 796 | if (err) |
| 797 | return err; |
| 798 | handle = ext4_journal_start_sb(sb, EXT4_HT_MISC, 1); |
| 799 | if (IS_ERR(handle)) { |
| 800 | err = PTR_ERR(handle); |
| 801 | goto pwsalt_err_exit; |
| 802 | } |
| 803 | err = ext4_journal_get_write_access(handle, sbi->s_sbh); |
| 804 | if (err) |
| 805 | goto pwsalt_err_journal; |
| 806 | generate_random_uuid(sbi->s_es->s_encrypt_pw_salt); |
| 807 | err = ext4_handle_dirty_metadata(handle, NULL, |
| 808 | sbi->s_sbh); |
| 809 | pwsalt_err_journal: |
| 810 | err2 = ext4_journal_stop(handle); |
| 811 | if (err2 && !err) |
| 812 | err = err2; |
| 813 | pwsalt_err_exit: |
| 814 | mnt_drop_write_file(filp); |
| 815 | if (err) |
| 816 | return err; |
| 817 | } |
Fabian Frederick | b4ab9e2 | 2015-06-08 12:23:21 -0400 | [diff] [blame] | 818 | if (copy_to_user((void __user *) arg, |
| 819 | sbi->s_es->s_encrypt_pw_salt, 16)) |
Michael Halcrow | 9bd8212 | 2015-04-11 07:48:01 -0400 | [diff] [blame] | 820 | return -EFAULT; |
| 821 | return 0; |
| 822 | } |
| 823 | case EXT4_IOC_GET_ENCRYPTION_POLICY: { |
| 824 | #ifdef CONFIG_EXT4_FS_ENCRYPTION |
| 825 | struct ext4_encryption_policy policy; |
| 826 | int err = 0; |
| 827 | |
| 828 | if (!ext4_encrypted_inode(inode)) |
| 829 | return -ENOENT; |
| 830 | err = ext4_get_policy(inode, &policy); |
| 831 | if (err) |
| 832 | return err; |
Fabian Frederick | b4ab9e2 | 2015-06-08 12:23:21 -0400 | [diff] [blame] | 833 | if (copy_to_user((void __user *)arg, &policy, sizeof(policy))) |
Michael Halcrow | 9bd8212 | 2015-04-11 07:48:01 -0400 | [diff] [blame] | 834 | return -EFAULT; |
| 835 | return 0; |
| 836 | #else |
| 837 | return -EOPNOTSUPP; |
| 838 | #endif |
| 839 | } |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 840 | case EXT4_IOC_FSGETXATTR: |
| 841 | { |
| 842 | struct fsxattr fa; |
| 843 | |
| 844 | memset(&fa, 0, sizeof(struct fsxattr)); |
| 845 | ext4_get_inode_flags(ei); |
| 846 | fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE); |
| 847 | |
| 848 | if (EXT4_HAS_RO_COMPAT_FEATURE(inode->i_sb, |
| 849 | EXT4_FEATURE_RO_COMPAT_PROJECT)) { |
| 850 | fa.fsx_projid = (__u32)from_kprojid(&init_user_ns, |
| 851 | EXT4_I(inode)->i_projid); |
| 852 | } |
| 853 | |
| 854 | if (copy_to_user((struct fsxattr __user *)arg, |
| 855 | &fa, sizeof(fa))) |
| 856 | return -EFAULT; |
| 857 | return 0; |
| 858 | } |
| 859 | case EXT4_IOC_FSSETXATTR: |
| 860 | { |
| 861 | struct fsxattr fa; |
| 862 | int err; |
| 863 | |
| 864 | if (copy_from_user(&fa, (struct fsxattr __user *)arg, |
| 865 | sizeof(fa))) |
| 866 | return -EFAULT; |
| 867 | |
| 868 | /* Make sure caller has proper permission */ |
| 869 | if (!inode_owner_or_capable(inode)) |
| 870 | return -EACCES; |
| 871 | |
| 872 | err = mnt_want_write_file(filp); |
| 873 | if (err) |
| 874 | return err; |
| 875 | |
| 876 | flags = ext4_xflags_to_iflags(fa.fsx_xflags); |
| 877 | flags = ext4_mask_flags(inode->i_mode, flags); |
| 878 | |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 879 | inode_lock(inode); |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 880 | flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) | |
| 881 | (flags & EXT4_FL_XFLAG_VISIBLE); |
| 882 | err = ext4_ioctl_setflags(inode, flags); |
Al Viro | 5955102 | 2016-01-22 15:40:57 -0500 | [diff] [blame] | 883 | inode_unlock(inode); |
Li Xi | 9b7365f | 2016-01-08 16:01:22 -0500 | [diff] [blame] | 884 | mnt_drop_write_file(filp); |
| 885 | if (err) |
| 886 | return err; |
| 887 | |
| 888 | err = ext4_ioctl_setproject(filp, fa.fsx_projid); |
| 889 | if (err) |
| 890 | return err; |
| 891 | |
| 892 | return 0; |
| 893 | } |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 894 | default: |
| 895 | return -ENOTTY; |
| 896 | } |
| 897 | } |
| 898 | |
| 899 | #ifdef CONFIG_COMPAT |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 900 | long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 901 | { |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 902 | /* These are just misnamed, they actually get/put from/to user an int */ |
| 903 | switch (cmd) { |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 904 | case EXT4_IOC32_GETFLAGS: |
| 905 | cmd = EXT4_IOC_GETFLAGS; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 906 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 907 | case EXT4_IOC32_SETFLAGS: |
| 908 | cmd = EXT4_IOC_SETFLAGS; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 909 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 910 | case EXT4_IOC32_GETVERSION: |
| 911 | cmd = EXT4_IOC_GETVERSION; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 912 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 913 | case EXT4_IOC32_SETVERSION: |
| 914 | cmd = EXT4_IOC_SETVERSION; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 915 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 916 | case EXT4_IOC32_GROUP_EXTEND: |
| 917 | cmd = EXT4_IOC_GROUP_EXTEND; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 918 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 919 | case EXT4_IOC32_GETVERSION_OLD: |
| 920 | cmd = EXT4_IOC_GETVERSION_OLD; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 921 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 922 | case EXT4_IOC32_SETVERSION_OLD: |
| 923 | cmd = EXT4_IOC_SETVERSION_OLD; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 924 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 925 | case EXT4_IOC32_GETRSVSZ: |
| 926 | cmd = EXT4_IOC_GETRSVSZ; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 927 | break; |
Mingming Cao | 617ba13 | 2006-10-11 01:20:53 -0700 | [diff] [blame] | 928 | case EXT4_IOC32_SETRSVSZ: |
| 929 | cmd = EXT4_IOC_SETRSVSZ; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 930 | break; |
Ben Hutchings | 4d92dc0 | 2010-05-17 06:00:00 -0400 | [diff] [blame] | 931 | case EXT4_IOC32_GROUP_ADD: { |
| 932 | struct compat_ext4_new_group_input __user *uinput; |
| 933 | struct ext4_new_group_input input; |
| 934 | mm_segment_t old_fs; |
| 935 | int err; |
| 936 | |
| 937 | uinput = compat_ptr(arg); |
| 938 | err = get_user(input.group, &uinput->group); |
| 939 | err |= get_user(input.block_bitmap, &uinput->block_bitmap); |
| 940 | err |= get_user(input.inode_bitmap, &uinput->inode_bitmap); |
| 941 | err |= get_user(input.inode_table, &uinput->inode_table); |
| 942 | err |= get_user(input.blocks_count, &uinput->blocks_count); |
| 943 | err |= get_user(input.reserved_blocks, |
| 944 | &uinput->reserved_blocks); |
| 945 | if (err) |
| 946 | return -EFAULT; |
| 947 | old_fs = get_fs(); |
| 948 | set_fs(KERNEL_DS); |
| 949 | err = ext4_ioctl(file, EXT4_IOC_GROUP_ADD, |
| 950 | (unsigned long) &input); |
| 951 | set_fs(old_fs); |
| 952 | return err; |
| 953 | } |
Christian Borntraeger | b684b2e | 2010-05-15 00:00:00 -0400 | [diff] [blame] | 954 | case EXT4_IOC_MOVE_EXT: |
Yongqiang Yang | 19c5246 | 2012-01-04 17:09:44 -0500 | [diff] [blame] | 955 | case EXT4_IOC_RESIZE_FS: |
Theodore Ts'o | 7869a4a | 2013-08-16 22:05:14 -0400 | [diff] [blame] | 956 | case EXT4_IOC_PRECACHE_EXTENTS: |
Michael Halcrow | 9bd8212 | 2015-04-11 07:48:01 -0400 | [diff] [blame] | 957 | case EXT4_IOC_SET_ENCRYPTION_POLICY: |
| 958 | case EXT4_IOC_GET_ENCRYPTION_PWSALT: |
| 959 | case EXT4_IOC_GET_ENCRYPTION_POLICY: |
Christian Borntraeger | b684b2e | 2010-05-15 00:00:00 -0400 | [diff] [blame] | 960 | break; |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 961 | default: |
| 962 | return -ENOIOCTLCMD; |
| 963 | } |
Andi Kleen | 5cdd7b2 | 2008-04-29 22:03:54 -0400 | [diff] [blame] | 964 | return ext4_ioctl(file, cmd, (unsigned long) compat_ptr(arg)); |
Dave Kleikamp | ac27a0e | 2006-10-11 01:20:50 -0700 | [diff] [blame] | 965 | } |
| 966 | #endif |