1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * NILFS ioctl operations. 4 * 5 * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation. 6 * 7 * Written by Koji Sato. 8 */ 9 10 #include <linux/fs.h> 11 #include <linux/wait.h> 12 #include <linux/slab.h> 13 #include <linux/capability.h> /* capable() */ 14 #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ 15 #include <linux/vmalloc.h> 16 #include <linux/compat.h> /* compat_ptr() */ 17 #include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */ 18 #include <linux/buffer_head.h> 19 #include <linux/fileattr.h> 20 #include <linux/string.h> 21 #include "nilfs.h" 22 #include "segment.h" 23 #include "bmap.h" 24 #include "cpfile.h" 25 #include "sufile.h" 26 #include "dat.h" 27 28 /** 29 * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info 30 * @nilfs: nilfs object 31 * @argv: vector of arguments from userspace 32 * @dir: set of direction flags 33 * @dofunc: concrete function of get/set metadata info 34 * 35 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of 36 * calling dofunc() function on the basis of @argv argument. If successful, 37 * the requested metadata information is copied to userspace memory. 38 * 39 * Return: 0 on success, or one of the following negative error codes on 40 * failure: 41 * * %-EFAULT - Failure during execution of requested operation. 42 * * %-EINVAL - Invalid arguments from userspace. 43 * * %-ENOMEM - Insufficient memory available. 44 */ 45 static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, 46 struct nilfs_argv *argv, int dir, 47 ssize_t (*dofunc)(struct the_nilfs *, 48 __u64 *, int, 49 void *, size_t, size_t)) 50 { 51 void *buf; 52 void __user *base = u64_to_user_ptr(argv->v_base); 53 size_t maxmembs, total, n; 54 ssize_t nr; 55 int ret, i; 56 __u64 pos, ppos; 57 58 if (argv->v_nmembs == 0) 59 return 0; 60 61 if ((size_t)argv->v_size > PAGE_SIZE) 62 return -EINVAL; 63 64 /* 65 * Reject pairs of a start item position (argv->v_index) and a 66 * total count (argv->v_nmembs) which leads position 'pos' to 67 * overflow by the increment at the end of the loop. 68 */ 69 if (argv->v_index > ~(__u64)0 - argv->v_nmembs) 70 return -EINVAL; 71 72 buf = (void *)get_zeroed_page(GFP_NOFS); 73 if (unlikely(!buf)) 74 return -ENOMEM; 75 maxmembs = PAGE_SIZE / argv->v_size; 76 77 ret = 0; 78 total = 0; 79 pos = argv->v_index; 80 for (i = 0; i < argv->v_nmembs; i += n) { 81 n = (argv->v_nmembs - i < maxmembs) ? 82 argv->v_nmembs - i : maxmembs; 83 if ((dir & _IOC_WRITE) && 84 copy_from_user(buf, base + argv->v_size * i, 85 argv->v_size * n)) { 86 ret = -EFAULT; 87 break; 88 } 89 ppos = pos; 90 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, 91 n); 92 if (nr < 0) { 93 ret = nr; 94 break; 95 } 96 if ((dir & _IOC_READ) && 97 copy_to_user(base + argv->v_size * i, buf, 98 argv->v_size * nr)) { 99 ret = -EFAULT; 100 break; 101 } 102 total += nr; 103 if ((size_t)nr < n) 104 break; 105 if (pos == ppos) 106 pos += n; 107 } 108 argv->v_nmembs = total; 109 110 free_pages((unsigned long)buf, 0); 111 return ret; 112 } 113 114 /** 115 * nilfs_fileattr_get - retrieve miscellaneous file attributes 116 * @dentry: the object to retrieve from 117 * @fa: fileattr pointer 118 * 119 * Return: always 0 as success. 120 */ 121 int nilfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) 122 { 123 struct inode *inode = d_inode(dentry); 124 125 fileattr_fill_flags(fa, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE); 126 127 return 0; 128 } 129 130 /** 131 * nilfs_fileattr_set - change miscellaneous file attributes 132 * @idmap: idmap of the mount 133 * @dentry: the object to change 134 * @fa: fileattr pointer 135 * 136 * Return: 0 on success, or a negative error code on failure. 137 */ 138 int nilfs_fileattr_set(struct mnt_idmap *idmap, 139 struct dentry *dentry, struct file_kattr *fa) 140 { 141 struct inode *inode = d_inode(dentry); 142 struct nilfs_transaction_info ti; 143 unsigned int flags, oldflags; 144 int ret; 145 146 if (fileattr_has_fsx(fa)) 147 return -EOPNOTSUPP; 148 149 flags = nilfs_mask_flags(inode->i_mode, fa->flags); 150 151 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0); 152 if (ret) 153 return ret; 154 155 oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE; 156 NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE); 157 158 nilfs_set_inode_flags(inode); 159 inode_set_ctime_current(inode); 160 if (IS_SYNC(inode)) 161 nilfs_set_transaction_flag(NILFS_TI_SYNC); 162 163 nilfs_mark_inode_dirty(inode); 164 return nilfs_transaction_commit(inode->i_sb); 165 } 166 167 /** 168 * nilfs_ioctl_getversion - get info about a file's version (generation number) 169 * @inode: inode object 170 * @argp: userspace memory where the generation number of @inode is stored 171 * 172 * Return: 0 on success, or %-EFAULT on error. 173 */ 174 static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp) 175 { 176 return put_user(inode->i_generation, (int __user *)argp); 177 } 178 179 /** 180 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot) 181 * @inode: inode object 182 * @filp: file object 183 * @cmd: ioctl's request code 184 * @argp: pointer on argument from userspace 185 * 186 * Description: nilfs_ioctl_change_cpmode() function changes mode of 187 * given checkpoint between checkpoint and snapshot state. This ioctl 188 * is used in chcp and mkcp utilities. 189 * 190 * Return: 0 on success, or one of the following negative error codes on 191 * failure: 192 * %-EFAULT - Failure during checkpoint mode changing. 193 * %-EPERM - Operation not permitted. 194 */ 195 static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, 196 unsigned int cmd, void __user *argp) 197 { 198 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 199 struct nilfs_transaction_info ti; 200 struct nilfs_cpmode cpmode; 201 int ret; 202 203 if (!capable(CAP_SYS_ADMIN)) 204 return -EPERM; 205 206 ret = mnt_want_write_file(filp); 207 if (ret) 208 return ret; 209 210 ret = -EFAULT; 211 if (copy_from_user(&cpmode, argp, sizeof(cpmode))) 212 goto out; 213 214 mutex_lock(&nilfs->ns_snapshot_mount_mutex); 215 216 nilfs_transaction_begin(inode->i_sb, &ti, 0); 217 ret = nilfs_cpfile_change_cpmode( 218 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode); 219 if (unlikely(ret < 0)) 220 nilfs_transaction_abort(inode->i_sb); 221 else 222 nilfs_transaction_commit(inode->i_sb); /* never fails */ 223 224 mutex_unlock(&nilfs->ns_snapshot_mount_mutex); 225 out: 226 mnt_drop_write_file(filp); 227 return ret; 228 } 229 230 /** 231 * nilfs_ioctl_delete_checkpoint - remove checkpoint 232 * @inode: inode object 233 * @filp: file object 234 * @cmd: ioctl's request code 235 * @argp: pointer on argument from userspace 236 * 237 * Description: nilfs_ioctl_delete_checkpoint() function removes 238 * checkpoint from NILFS2 file system. This ioctl is used in rmcp 239 * utility. 240 * 241 * Return: 0 on success, or one of the following negative error codes on 242 * failure: 243 * %-EFAULT - Failure during checkpoint removing. 244 * %-EPERM - Operation not permitted. 245 */ 246 static int 247 nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, 248 unsigned int cmd, void __user *argp) 249 { 250 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 251 struct nilfs_transaction_info ti; 252 __u64 cno; 253 int ret; 254 255 if (!capable(CAP_SYS_ADMIN)) 256 return -EPERM; 257 258 ret = mnt_want_write_file(filp); 259 if (ret) 260 return ret; 261 262 ret = -EFAULT; 263 if (copy_from_user(&cno, argp, sizeof(cno))) 264 goto out; 265 266 nilfs_transaction_begin(inode->i_sb, &ti, 0); 267 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno); 268 if (unlikely(ret < 0)) 269 nilfs_transaction_abort(inode->i_sb); 270 else 271 nilfs_transaction_commit(inode->i_sb); /* never fails */ 272 out: 273 mnt_drop_write_file(filp); 274 return ret; 275 } 276 277 /** 278 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints 279 * @nilfs: nilfs object 280 * @posp: pointer on array of checkpoint's numbers 281 * @flags: checkpoint mode (checkpoint or snapshot) 282 * @buf: buffer for storing checkponts' info 283 * @size: size in bytes of one checkpoint info item in array 284 * @nmembs: number of checkpoints in array (numbers and infos) 285 * 286 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about 287 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in 288 * lscp utility and by nilfs_cleanerd daemon. 289 * 290 * Return: Count of nilfs_cpinfo structures in output buffer. 291 */ 292 static ssize_t 293 nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 294 void *buf, size_t size, size_t nmembs) 295 { 296 int ret; 297 298 down_read(&nilfs->ns_segctor_sem); 299 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, 300 size, nmembs); 301 up_read(&nilfs->ns_segctor_sem); 302 return ret; 303 } 304 305 /** 306 * nilfs_ioctl_get_cpstat - get checkpoints statistics 307 * @inode: inode object 308 * @filp: file object 309 * @cmd: ioctl's request code 310 * @argp: pointer on argument from userspace 311 * 312 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints. 313 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities 314 * and by nilfs_cleanerd daemon. The checkpoint statistics are copied to 315 * the userspace memory pointed to by @argp. 316 * 317 * Return: 0 on success, or one of the following negative error codes on 318 * failure: 319 * * %-EFAULT - Failure during getting checkpoints statistics. 320 * * %-EIO - I/O error. 321 * * %-ENOMEM - Insufficient memory available. 322 */ 323 static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, 324 unsigned int cmd, void __user *argp) 325 { 326 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 327 struct nilfs_cpstat cpstat; 328 int ret; 329 330 down_read(&nilfs->ns_segctor_sem); 331 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); 332 up_read(&nilfs->ns_segctor_sem); 333 if (ret < 0) 334 return ret; 335 336 if (copy_to_user(argp, &cpstat, sizeof(cpstat))) 337 ret = -EFAULT; 338 return ret; 339 } 340 341 /** 342 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info 343 * @nilfs: nilfs object 344 * @posp: pointer on array of segment numbers 345 * @flags: *not used* 346 * @buf: buffer for storing suinfo array 347 * @size: size in bytes of one suinfo item in array 348 * @nmembs: count of segment numbers and suinfos in array 349 * 350 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage 351 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used 352 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon. 353 * 354 * Return: Count of nilfs_suinfo structures in output buffer on success, 355 * or a negative error code on failure. 356 */ 357 static ssize_t 358 nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 359 void *buf, size_t size, size_t nmembs) 360 { 361 int ret; 362 363 down_read(&nilfs->ns_segctor_sem); 364 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, 365 nmembs); 366 up_read(&nilfs->ns_segctor_sem); 367 return ret; 368 } 369 370 /** 371 * nilfs_ioctl_get_sustat - get segment usage statistics 372 * @inode: inode object 373 * @filp: file object 374 * @cmd: ioctl's request code 375 * @argp: pointer on argument from userspace 376 * 377 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics. 378 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities 379 * and by nilfs_cleanerd daemon. The requested segment usage information is 380 * copied to the userspace memory pointed to by @argp. 381 * 382 * Return: 0 on success, or one of the following negative error codes on 383 * failure: 384 * * %-EFAULT - Failure during getting segment usage statistics. 385 * * %-EIO - I/O error. 386 * * %-ENOMEM - Insufficient memory available. 387 */ 388 static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, 389 unsigned int cmd, void __user *argp) 390 { 391 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 392 struct nilfs_sustat sustat; 393 int ret; 394 395 down_read(&nilfs->ns_segctor_sem); 396 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); 397 up_read(&nilfs->ns_segctor_sem); 398 if (ret < 0) 399 return ret; 400 401 if (copy_to_user(argp, &sustat, sizeof(sustat))) 402 ret = -EFAULT; 403 return ret; 404 } 405 406 /** 407 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info 408 * @nilfs: nilfs object 409 * @posp: *not used* 410 * @flags: *not used* 411 * @buf: buffer for storing array of nilfs_vinfo structures 412 * @size: size in bytes of one vinfo item in array 413 * @nmembs: count of vinfos in array 414 * 415 * Description: nilfs_ioctl_do_get_vinfo() function returns information 416 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used 417 * by nilfs_cleanerd daemon. 418 * 419 * Return: Count of nilfs_vinfo structures in output buffer on success, or 420 * a negative error code on failure. 421 */ 422 static ssize_t 423 nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 424 void *buf, size_t size, size_t nmembs) 425 { 426 int ret; 427 428 down_read(&nilfs->ns_segctor_sem); 429 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); 430 up_read(&nilfs->ns_segctor_sem); 431 return ret; 432 } 433 434 /** 435 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors 436 * @nilfs: nilfs object 437 * @posp: *not used* 438 * @flags: *not used* 439 * @buf: buffer for storing array of nilfs_bdesc structures 440 * @size: size in bytes of one bdesc item in array 441 * @nmembs: count of bdescs in array 442 * 443 * Description: nilfs_ioctl_do_get_bdescs() function returns information 444 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 445 * is used by nilfs_cleanerd daemon. 446 * 447 * Return: Count of nilfs_bdescs structures in output buffer on success, or 448 * a negative error code on failure. 449 */ 450 static ssize_t 451 nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, 452 void *buf, size_t size, size_t nmembs) 453 { 454 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 455 struct nilfs_bdesc *bdescs = buf; 456 int ret, i; 457 458 down_read(&nilfs->ns_segctor_sem); 459 for (i = 0; i < nmembs; i++) { 460 ret = nilfs_bmap_lookup_at_level(bmap, 461 bdescs[i].bd_offset, 462 bdescs[i].bd_level + 1, 463 &bdescs[i].bd_blocknr); 464 if (ret < 0) { 465 if (ret != -ENOENT) { 466 up_read(&nilfs->ns_segctor_sem); 467 return ret; 468 } 469 bdescs[i].bd_blocknr = 0; 470 } 471 } 472 up_read(&nilfs->ns_segctor_sem); 473 return nmembs; 474 } 475 476 /** 477 * nilfs_ioctl_get_bdescs - get disk block descriptors 478 * @inode: inode object 479 * @filp: file object 480 * @cmd: ioctl's request code 481 * @argp: pointer on argument from userspace 482 * 483 * Description: nilfs_ioctl_do_get_bdescs() function returns information 484 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 485 * is used by nilfs_cleanerd daemon. If successful, disk block descriptors 486 * are copied to userspace pointer @argp. 487 * 488 * Return: 0 on success, or one of the following negative error codes on 489 * failure: 490 * * %-EFAULT - Failure during getting disk block descriptors. 491 * * %-EINVAL - Invalid arguments from userspace. 492 * * %-EIO - I/O error. 493 * * %-ENOMEM - Insufficient memory available. 494 */ 495 static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, 496 unsigned int cmd, void __user *argp) 497 { 498 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 499 struct nilfs_argv argv; 500 int ret; 501 502 if (copy_from_user(&argv, argp, sizeof(argv))) 503 return -EFAULT; 504 505 if (argv.v_size != sizeof(struct nilfs_bdesc)) 506 return -EINVAL; 507 508 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), 509 nilfs_ioctl_do_get_bdescs); 510 if (ret < 0) 511 return ret; 512 513 if (copy_to_user(argp, &argv, sizeof(argv))) 514 ret = -EFAULT; 515 return ret; 516 } 517 518 /** 519 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC 520 * @inode: inode object 521 * @vdesc: descriptor of virtual block number 522 * @buffers: list of moving buffers 523 * 524 * Description: nilfs_ioctl_move_inode_block() function registers data/node 525 * buffer in the GC pagecache and submit read request. 526 * 527 * Return: 0 on success, or one of the following negative error codes on 528 * failure: 529 * * %-EEXIST - Block conflict detected. 530 * * %-EIO - I/O error. 531 * * %-ENOENT - Requested block doesn't exist. 532 * * %-ENOMEM - Insufficient memory available. 533 */ 534 static int nilfs_ioctl_move_inode_block(struct inode *inode, 535 struct nilfs_vdesc *vdesc, 536 struct list_head *buffers) 537 { 538 struct buffer_head *bh; 539 int ret; 540 541 if (vdesc->vd_flags == 0) 542 ret = nilfs_gccache_submit_read_data( 543 inode, vdesc->vd_offset, vdesc->vd_blocknr, 544 vdesc->vd_vblocknr, &bh); 545 else 546 ret = nilfs_gccache_submit_read_node( 547 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); 548 549 if (unlikely(ret < 0)) { 550 if (ret == -ENOENT) 551 nilfs_crit(inode->i_sb, 552 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu", 553 __func__, vdesc->vd_flags ? "node" : "data", 554 (unsigned long long)vdesc->vd_ino, 555 (unsigned long long)vdesc->vd_cno, 556 (unsigned long long)vdesc->vd_offset, 557 (unsigned long long)vdesc->vd_blocknr, 558 (unsigned long long)vdesc->vd_vblocknr); 559 return ret; 560 } 561 if (unlikely(!list_empty(&bh->b_assoc_buffers))) { 562 nilfs_crit(inode->i_sb, 563 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu", 564 __func__, vdesc->vd_flags ? "node" : "data", 565 (unsigned long long)vdesc->vd_ino, 566 (unsigned long long)vdesc->vd_cno, 567 (unsigned long long)vdesc->vd_offset, 568 (unsigned long long)vdesc->vd_blocknr, 569 (unsigned long long)vdesc->vd_vblocknr); 570 brelse(bh); 571 return -EEXIST; 572 } 573 list_add_tail(&bh->b_assoc_buffers, buffers); 574 return 0; 575 } 576 577 /** 578 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection 579 * @sb: superblock object 580 * @argv: vector of arguments from userspace 581 * @buf: array of nilfs_vdesc structures 582 * 583 * Description: nilfs_ioctl_move_blocks() function reads valid data/node 584 * blocks that garbage collector specified with the array of nilfs_vdesc 585 * structures and stores them into page caches of GC inodes. 586 * 587 * Return: Number of processed nilfs_vdesc structures on success, or 588 * a negative error code on failure. 589 */ 590 static int nilfs_ioctl_move_blocks(struct super_block *sb, 591 struct nilfs_argv *argv, void *buf) 592 { 593 size_t nmembs = argv->v_nmembs; 594 struct the_nilfs *nilfs = sb->s_fs_info; 595 struct inode *inode; 596 struct nilfs_vdesc *vdesc; 597 struct buffer_head *bh, *n; 598 LIST_HEAD(buffers); 599 ino_t ino; 600 __u64 cno; 601 int i, ret; 602 603 for (i = 0, vdesc = buf; i < nmembs; ) { 604 ino = vdesc->vd_ino; 605 cno = vdesc->vd_cno; 606 inode = nilfs_iget_for_gc(sb, ino, cno); 607 if (IS_ERR(inode)) { 608 ret = PTR_ERR(inode); 609 goto failed; 610 } 611 if (list_empty(&NILFS_I(inode)->i_dirty)) { 612 /* 613 * Add the inode to GC inode list. Garbage Collection 614 * is serialized and no two processes manipulate the 615 * list simultaneously. 616 */ 617 igrab(inode); 618 list_add(&NILFS_I(inode)->i_dirty, 619 &nilfs->ns_gc_inodes); 620 } 621 622 do { 623 ret = nilfs_ioctl_move_inode_block(inode, vdesc, 624 &buffers); 625 if (unlikely(ret < 0)) { 626 iput(inode); 627 goto failed; 628 } 629 vdesc++; 630 } while (++i < nmembs && 631 vdesc->vd_ino == ino && vdesc->vd_cno == cno); 632 633 iput(inode); /* The inode still remains in GC inode list */ 634 } 635 636 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 637 ret = nilfs_gccache_wait_and_mark_dirty(bh); 638 if (unlikely(ret < 0)) { 639 WARN_ON(ret == -EEXIST); 640 goto failed; 641 } 642 list_del_init(&bh->b_assoc_buffers); 643 brelse(bh); 644 } 645 return nmembs; 646 647 failed: 648 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 649 list_del_init(&bh->b_assoc_buffers); 650 brelse(bh); 651 } 652 return ret; 653 } 654 655 /** 656 * nilfs_ioctl_delete_checkpoints - delete checkpoints 657 * @nilfs: nilfs object 658 * @argv: vector of arguments from userspace 659 * @buf: array of periods of checkpoints numbers 660 * 661 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints 662 * in the period from p_start to p_end, excluding p_end itself. The checkpoints 663 * which have been already deleted are ignored. 664 * 665 * Return: Number of processed nilfs_period structures on success, or one of 666 * the following negative error codes on failure: 667 * * %-EINVAL - invalid checkpoints. 668 * * %-EIO - I/O error. 669 * * %-ENOMEM - Insufficient memory available. 670 */ 671 static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, 672 struct nilfs_argv *argv, void *buf) 673 { 674 size_t nmembs = argv->v_nmembs; 675 struct inode *cpfile = nilfs->ns_cpfile; 676 struct nilfs_period *periods = buf; 677 int ret, i; 678 679 for (i = 0; i < nmembs; i++) { 680 ret = nilfs_cpfile_delete_checkpoints( 681 cpfile, periods[i].p_start, periods[i].p_end); 682 if (ret < 0) 683 return ret; 684 } 685 return nmembs; 686 } 687 688 /** 689 * nilfs_ioctl_free_vblocknrs - free virtual block numbers 690 * @nilfs: nilfs object 691 * @argv: vector of arguments from userspace 692 * @buf: array of virtual block numbers 693 * 694 * Description: nilfs_ioctl_free_vblocknrs() function frees 695 * the virtual block numbers specified by @buf and @argv->v_nmembs. 696 * 697 * Return: Number of processed virtual block numbers on success, or one of the 698 * following negative error codes on failure: 699 * * %-EIO - I/O error. 700 * * %-ENOENT - Unallocated virtual block number. 701 * * %-ENOMEM - Insufficient memory available. 702 */ 703 static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, 704 struct nilfs_argv *argv, void *buf) 705 { 706 size_t nmembs = argv->v_nmembs; 707 int ret; 708 709 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); 710 711 return (ret < 0) ? ret : nmembs; 712 } 713 714 /** 715 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty 716 * @nilfs: nilfs object 717 * @argv: vector of arguments from userspace 718 * @buf: array of block descriptors 719 * 720 * Description: nilfs_ioctl_mark_blocks_dirty() function marks 721 * metadata file or data blocks as dirty. 722 * 723 * Return: Number of processed block descriptors on success, or one of the 724 * following negative error codes on failure: 725 * * %-EIO - I/O error. 726 * * %-ENOENT - Non-existent block (hole block). 727 * * %-ENOMEM - Insufficient memory available. 728 */ 729 static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, 730 struct nilfs_argv *argv, void *buf) 731 { 732 size_t nmembs = argv->v_nmembs; 733 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 734 struct nilfs_bdesc *bdescs = buf; 735 struct buffer_head *bh; 736 int ret, i; 737 738 for (i = 0; i < nmembs; i++) { 739 /* 740 * bd_oblocknr must never be 0 as block 0 741 * is never a valid GC target block 742 */ 743 if (unlikely(!bdescs[i].bd_oblocknr)) 744 return -EINVAL; 745 /* XXX: use macro or inline func to check liveness */ 746 ret = nilfs_bmap_lookup_at_level(bmap, 747 bdescs[i].bd_offset, 748 bdescs[i].bd_level + 1, 749 &bdescs[i].bd_blocknr); 750 if (ret < 0) { 751 if (ret != -ENOENT) 752 return ret; 753 bdescs[i].bd_blocknr = 0; 754 } 755 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) 756 /* skip dead block */ 757 continue; 758 if (bdescs[i].bd_level == 0) { 759 ret = nilfs_mdt_get_block(nilfs->ns_dat, 760 bdescs[i].bd_offset, 761 false, NULL, &bh); 762 if (unlikely(ret)) { 763 WARN_ON(ret == -ENOENT); 764 return ret; 765 } 766 mark_buffer_dirty(bh); 767 nilfs_mdt_mark_dirty(nilfs->ns_dat); 768 put_bh(bh); 769 } else { 770 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, 771 bdescs[i].bd_level); 772 if (ret < 0) { 773 WARN_ON(ret == -ENOENT); 774 return ret; 775 } 776 } 777 } 778 return nmembs; 779 } 780 781 int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, 782 struct nilfs_argv *argv, void **kbufs) 783 { 784 const char *msg; 785 int ret; 786 787 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); 788 if (ret < 0) { 789 /* 790 * can safely abort because checkpoints can be removed 791 * independently. 792 */ 793 msg = "cannot delete checkpoints"; 794 goto failed; 795 } 796 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); 797 if (ret < 0) { 798 /* 799 * can safely abort because DAT file is updated atomically 800 * using a copy-on-write technique. 801 */ 802 msg = "cannot delete virtual blocks from DAT file"; 803 goto failed; 804 } 805 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); 806 if (ret < 0) { 807 /* 808 * can safely abort because the operation is nondestructive. 809 */ 810 msg = "cannot mark copying blocks dirty"; 811 goto failed; 812 } 813 return 0; 814 815 failed: 816 nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg); 817 return ret; 818 } 819 820 /** 821 * nilfs_ioctl_clean_segments - clean segments 822 * @inode: inode object 823 * @filp: file object 824 * @cmd: ioctl's request code 825 * @argp: pointer on argument from userspace 826 * 827 * Description: nilfs_ioctl_clean_segments() function makes garbage 828 * collection operation in the environment of requested parameters 829 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by 830 * nilfs_cleanerd daemon. 831 * 832 * Return: 0 on success, or a negative error code on failure. 833 */ 834 static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, 835 unsigned int cmd, void __user *argp) 836 { 837 struct nilfs_argv argv[5]; 838 static const size_t argsz[5] = { 839 sizeof(struct nilfs_vdesc), 840 sizeof(struct nilfs_period), 841 sizeof(__u64), 842 sizeof(struct nilfs_bdesc), 843 sizeof(__u64), 844 }; 845 void *kbufs[5]; 846 struct the_nilfs *nilfs; 847 size_t len, nsegs; 848 int n, ret; 849 850 if (!capable(CAP_SYS_ADMIN)) 851 return -EPERM; 852 853 ret = mnt_want_write_file(filp); 854 if (ret) 855 return ret; 856 857 ret = -EFAULT; 858 if (copy_from_user(argv, argp, sizeof(argv))) 859 goto out; 860 861 ret = -EINVAL; 862 nsegs = argv[4].v_nmembs; 863 if (argv[4].v_size != argsz[4]) 864 goto out; 865 866 /* 867 * argv[4] points to segment numbers this ioctl cleans. We 868 * use kmalloc() for its buffer because the memory used for the 869 * segment numbers is small enough. 870 */ 871 kbufs[4] = memdup_array_user(u64_to_user_ptr(argv[4].v_base), 872 nsegs, sizeof(__u64)); 873 if (IS_ERR(kbufs[4])) { 874 ret = PTR_ERR(kbufs[4]); 875 goto out; 876 } 877 nilfs = inode->i_sb->s_fs_info; 878 879 for (n = 0; n < 4; n++) { 880 ret = -EINVAL; 881 if (argv[n].v_size != argsz[n]) 882 goto out_free; 883 884 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) 885 goto out_free; 886 887 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size) 888 goto out_free; 889 890 len = argv[n].v_size * argv[n].v_nmembs; 891 if (len == 0) { 892 kbufs[n] = NULL; 893 continue; 894 } 895 896 kbufs[n] = vmemdup_user(u64_to_user_ptr(argv[n].v_base), len); 897 if (IS_ERR(kbufs[n])) { 898 ret = PTR_ERR(kbufs[n]); 899 goto out_free; 900 } 901 } 902 903 /* 904 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), 905 * which will operates an inode list without blocking. 906 * To protect the list from concurrent operations, 907 * nilfs_ioctl_move_blocks should be atomic operation. 908 */ 909 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { 910 ret = -EBUSY; 911 goto out_free; 912 } 913 914 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); 915 if (ret < 0) { 916 nilfs_err(inode->i_sb, 917 "error %d preparing GC: cannot read source blocks", 918 ret); 919 } else { 920 if (nilfs_sb_need_update(nilfs)) 921 set_nilfs_discontinued(nilfs); 922 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); 923 } 924 925 nilfs_remove_all_gcinodes(nilfs); 926 clear_nilfs_gc_running(nilfs); 927 928 out_free: 929 while (--n >= 0) 930 kvfree(kbufs[n]); 931 kfree(kbufs[4]); 932 out: 933 mnt_drop_write_file(filp); 934 return ret; 935 } 936 937 /** 938 * nilfs_ioctl_sync - make a checkpoint 939 * @inode: inode object 940 * @filp: file object 941 * @cmd: ioctl's request code 942 * @argp: pointer on argument from userspace 943 * 944 * Description: nilfs_ioctl_sync() function constructs a logical segment 945 * for checkpointing. This function guarantees that all modified data 946 * and metadata are written out to the device when it successfully 947 * returned. 948 * 949 * Return: 0 on success, or one of the following negative error codes on 950 * failure: 951 * * %-EFAULT - Failure during execution of requested operation. 952 * * %-EIO - I/O error. 953 * * %-ENOMEM - Insufficient memory available. 954 * * %-ENOSPC - No space left on device (only in a panic state). 955 * * %-ERESTARTSYS - Interrupted. 956 * * %-EROFS - Read only filesystem. 957 */ 958 static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, 959 unsigned int cmd, void __user *argp) 960 { 961 __u64 cno; 962 int ret; 963 struct the_nilfs *nilfs; 964 965 ret = nilfs_construct_segment(inode->i_sb); 966 if (ret < 0) 967 return ret; 968 969 nilfs = inode->i_sb->s_fs_info; 970 ret = nilfs_flush_device(nilfs); 971 if (ret < 0) 972 return ret; 973 974 if (argp != NULL) { 975 down_read(&nilfs->ns_segctor_sem); 976 cno = nilfs->ns_cno - 1; 977 up_read(&nilfs->ns_segctor_sem); 978 if (copy_to_user(argp, &cno, sizeof(cno))) 979 return -EFAULT; 980 } 981 return 0; 982 } 983 984 /** 985 * nilfs_ioctl_resize - resize NILFS2 volume 986 * @inode: inode object 987 * @filp: file object 988 * @argp: pointer on argument from userspace 989 * 990 * Return: 0 on success, or a negative error code on failure. 991 */ 992 static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, 993 void __user *argp) 994 { 995 __u64 newsize; 996 int ret = -EPERM; 997 998 if (!capable(CAP_SYS_ADMIN)) 999 goto out; 1000 1001 ret = mnt_want_write_file(filp); 1002 if (ret) 1003 goto out; 1004 1005 ret = -EFAULT; 1006 if (copy_from_user(&newsize, argp, sizeof(newsize))) 1007 goto out_drop_write; 1008 1009 ret = nilfs_resize_fs(inode->i_sb, newsize); 1010 1011 out_drop_write: 1012 mnt_drop_write_file(filp); 1013 out: 1014 return ret; 1015 } 1016 1017 /** 1018 * nilfs_ioctl_trim_fs() - trim ioctl handle function 1019 * @inode: inode object 1020 * @argp: pointer on argument from userspace 1021 * 1022 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It 1023 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which 1024 * performs the actual trim operation. 1025 * 1026 * Return: 0 on success, or a negative error code on failure. 1027 */ 1028 static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp) 1029 { 1030 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1031 struct fstrim_range range; 1032 int ret; 1033 1034 if (!capable(CAP_SYS_ADMIN)) 1035 return -EPERM; 1036 1037 if (!bdev_max_discard_sectors(nilfs->ns_bdev)) 1038 return -EOPNOTSUPP; 1039 1040 if (copy_from_user(&range, argp, sizeof(range))) 1041 return -EFAULT; 1042 1043 range.minlen = max_t(u64, range.minlen, 1044 bdev_discard_granularity(nilfs->ns_bdev)); 1045 1046 down_read(&nilfs->ns_segctor_sem); 1047 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range); 1048 up_read(&nilfs->ns_segctor_sem); 1049 1050 if (ret < 0) 1051 return ret; 1052 1053 if (copy_to_user(argp, &range, sizeof(range))) 1054 return -EFAULT; 1055 1056 return 0; 1057 } 1058 1059 /** 1060 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated 1061 * @inode: inode object 1062 * @argp: pointer on argument from userspace 1063 * 1064 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit 1065 * of segments in bytes and upper limit of segments in bytes. 1066 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility. 1067 * 1068 * Return: 0 on success, or a negative error code on failure. 1069 */ 1070 static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) 1071 { 1072 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1073 __u64 range[2]; 1074 __u64 minseg, maxseg; 1075 unsigned long segbytes; 1076 int ret = -EPERM; 1077 1078 if (!capable(CAP_SYS_ADMIN)) 1079 goto out; 1080 1081 ret = -EFAULT; 1082 if (copy_from_user(range, argp, sizeof(__u64[2]))) 1083 goto out; 1084 1085 ret = -ERANGE; 1086 if (range[1] > bdev_nr_bytes(inode->i_sb->s_bdev)) 1087 goto out; 1088 1089 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; 1090 1091 minseg = range[0] + segbytes - 1; 1092 minseg = div64_ul(minseg, segbytes); 1093 1094 if (range[1] < 4096) 1095 goto out; 1096 1097 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); 1098 if (maxseg < segbytes) 1099 goto out; 1100 1101 maxseg = div64_ul(maxseg, segbytes); 1102 maxseg--; 1103 1104 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); 1105 out: 1106 return ret; 1107 } 1108 1109 /** 1110 * nilfs_ioctl_get_info - wrapping function of get metadata info 1111 * @inode: inode object 1112 * @filp: file object 1113 * @cmd: ioctl's request code 1114 * @argp: pointer on argument from userspace 1115 * @membsz: size of an item in bytes 1116 * @dofunc: concrete function of getting metadata info 1117 * 1118 * Description: nilfs_ioctl_get_info() gets metadata info by means of 1119 * calling dofunc() function. The requested metadata information is copied 1120 * to userspace memory @argp. 1121 * 1122 * Return: 0 on success, or one of the following negative error codes on 1123 * failure: 1124 * * %-EFAULT - Failure during execution of requested operation. 1125 * * %-EINVAL - Invalid arguments from userspace. 1126 * * %-EIO - I/O error. 1127 * * %-ENOMEM - Insufficient memory available. 1128 */ 1129 static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, 1130 unsigned int cmd, void __user *argp, 1131 size_t membsz, 1132 ssize_t (*dofunc)(struct the_nilfs *, 1133 __u64 *, int, 1134 void *, size_t, size_t)) 1135 1136 { 1137 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1138 struct nilfs_argv argv; 1139 int ret; 1140 1141 if (copy_from_user(&argv, argp, sizeof(argv))) 1142 return -EFAULT; 1143 1144 if (argv.v_size < membsz) 1145 return -EINVAL; 1146 1147 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); 1148 if (ret < 0) 1149 return ret; 1150 1151 if (copy_to_user(argp, &argv, sizeof(argv))) 1152 ret = -EFAULT; 1153 return ret; 1154 } 1155 1156 /** 1157 * nilfs_ioctl_set_suinfo - set segment usage info 1158 * @inode: inode object 1159 * @filp: file object 1160 * @cmd: ioctl's request code 1161 * @argp: pointer on argument from userspace 1162 * 1163 * Description: Expects an array of nilfs_suinfo_update structures 1164 * encapsulated in nilfs_argv and updates the segment usage info 1165 * according to the flags in nilfs_suinfo_update. 1166 * 1167 * Return: 0 on success, or one of the following negative error codes on 1168 * failure: 1169 * * %-EEXIST - Block conflict detected. 1170 * * %-EFAULT - Error copying input data. 1171 * * %-EINVAL - Invalid values in input (segment number, flags or nblocks). 1172 * * %-EIO - I/O error. 1173 * * %-ENOMEM - Insufficient memory available. 1174 * * %-EPERM - Not enough permissions. 1175 */ 1176 static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp, 1177 unsigned int cmd, void __user *argp) 1178 { 1179 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1180 struct nilfs_transaction_info ti; 1181 struct nilfs_argv argv; 1182 size_t len; 1183 void *kbuf; 1184 int ret; 1185 1186 if (!capable(CAP_SYS_ADMIN)) 1187 return -EPERM; 1188 1189 ret = mnt_want_write_file(filp); 1190 if (ret) 1191 return ret; 1192 1193 ret = -EFAULT; 1194 if (copy_from_user(&argv, argp, sizeof(argv))) 1195 goto out; 1196 1197 ret = -EINVAL; 1198 if (argv.v_size < sizeof(struct nilfs_suinfo_update)) 1199 goto out; 1200 1201 if (argv.v_nmembs > nilfs->ns_nsegments) 1202 goto out; 1203 1204 if (argv.v_nmembs >= UINT_MAX / argv.v_size) 1205 goto out; 1206 1207 len = argv.v_size * argv.v_nmembs; 1208 if (!len) { 1209 ret = 0; 1210 goto out; 1211 } 1212 1213 kbuf = vmemdup_user(u64_to_user_ptr(argv.v_base), len); 1214 if (IS_ERR(kbuf)) { 1215 ret = PTR_ERR(kbuf); 1216 goto out; 1217 } 1218 1219 nilfs_transaction_begin(inode->i_sb, &ti, 0); 1220 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size, 1221 argv.v_nmembs); 1222 if (unlikely(ret < 0)) 1223 nilfs_transaction_abort(inode->i_sb); 1224 else 1225 nilfs_transaction_commit(inode->i_sb); /* never fails */ 1226 1227 kvfree(kbuf); 1228 out: 1229 mnt_drop_write_file(filp); 1230 return ret; 1231 } 1232 1233 /** 1234 * nilfs_ioctl_get_fslabel - get the volume name of the file system 1235 * @sb: super block instance 1236 * @argp: pointer to userspace memory where the volume name should be stored 1237 * 1238 * Return: 0 on success, %-EFAULT if copying to userspace memory fails. 1239 */ 1240 static int nilfs_ioctl_get_fslabel(struct super_block *sb, void __user *argp) 1241 { 1242 struct the_nilfs *nilfs = sb->s_fs_info; 1243 char label[NILFS_MAX_VOLUME_NAME + 1]; 1244 1245 BUILD_BUG_ON(NILFS_MAX_VOLUME_NAME >= FSLABEL_MAX); 1246 1247 down_read(&nilfs->ns_sem); 1248 memtostr_pad(label, nilfs->ns_sbp[0]->s_volume_name); 1249 up_read(&nilfs->ns_sem); 1250 1251 if (copy_to_user(argp, label, sizeof(label))) 1252 return -EFAULT; 1253 return 0; 1254 } 1255 1256 /** 1257 * nilfs_ioctl_set_fslabel - set the volume name of the file system 1258 * @sb: super block instance 1259 * @filp: file object 1260 * @argp: pointer to userspace memory that contains the volume name 1261 * 1262 * Return: 0 on success, or one of the following negative error codes on 1263 * failure: 1264 * * %-EFAULT - Error copying input data. 1265 * * %-EINVAL - Label length exceeds record size in superblock. 1266 * * %-EIO - I/O error. 1267 * * %-EPERM - Operation not permitted (insufficient permissions). 1268 * * %-EROFS - Read only file system. 1269 */ 1270 static int nilfs_ioctl_set_fslabel(struct super_block *sb, struct file *filp, 1271 void __user *argp) 1272 { 1273 char label[NILFS_MAX_VOLUME_NAME + 1]; 1274 struct the_nilfs *nilfs = sb->s_fs_info; 1275 struct nilfs_super_block **sbp; 1276 size_t len; 1277 int ret; 1278 1279 if (!capable(CAP_SYS_ADMIN)) 1280 return -EPERM; 1281 1282 ret = mnt_want_write_file(filp); 1283 if (ret) 1284 return ret; 1285 1286 if (copy_from_user(label, argp, NILFS_MAX_VOLUME_NAME + 1)) { 1287 ret = -EFAULT; 1288 goto out_drop_write; 1289 } 1290 1291 len = strnlen(label, NILFS_MAX_VOLUME_NAME + 1); 1292 if (len > NILFS_MAX_VOLUME_NAME) { 1293 nilfs_err(sb, "unable to set label with more than %zu bytes", 1294 NILFS_MAX_VOLUME_NAME); 1295 ret = -EINVAL; 1296 goto out_drop_write; 1297 } 1298 1299 down_write(&nilfs->ns_sem); 1300 sbp = nilfs_prepare_super(sb, false); 1301 if (unlikely(!sbp)) { 1302 ret = -EIO; 1303 goto out_unlock; 1304 } 1305 1306 strtomem_pad(sbp[0]->s_volume_name, label, 0); 1307 if (sbp[1]) 1308 strtomem_pad(sbp[1]->s_volume_name, label, 0); 1309 1310 ret = nilfs_commit_super(sb, NILFS_SB_COMMIT_ALL); 1311 1312 out_unlock: 1313 up_write(&nilfs->ns_sem); 1314 out_drop_write: 1315 mnt_drop_write_file(filp); 1316 return ret; 1317 } 1318 1319 long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1320 { 1321 struct inode *inode = file_inode(filp); 1322 void __user *argp = (void __user *)arg; 1323 1324 switch (cmd) { 1325 case FS_IOC_GETVERSION: 1326 return nilfs_ioctl_getversion(inode, argp); 1327 case NILFS_IOCTL_CHANGE_CPMODE: 1328 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); 1329 case NILFS_IOCTL_DELETE_CHECKPOINT: 1330 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); 1331 case NILFS_IOCTL_GET_CPINFO: 1332 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1333 sizeof(struct nilfs_cpinfo), 1334 nilfs_ioctl_do_get_cpinfo); 1335 case NILFS_IOCTL_GET_CPSTAT: 1336 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); 1337 case NILFS_IOCTL_GET_SUINFO: 1338 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1339 sizeof(struct nilfs_suinfo), 1340 nilfs_ioctl_do_get_suinfo); 1341 case NILFS_IOCTL_SET_SUINFO: 1342 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp); 1343 case NILFS_IOCTL_GET_SUSTAT: 1344 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); 1345 case NILFS_IOCTL_GET_VINFO: 1346 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1347 sizeof(struct nilfs_vinfo), 1348 nilfs_ioctl_do_get_vinfo); 1349 case NILFS_IOCTL_GET_BDESCS: 1350 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); 1351 case NILFS_IOCTL_CLEAN_SEGMENTS: 1352 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); 1353 case NILFS_IOCTL_SYNC: 1354 return nilfs_ioctl_sync(inode, filp, cmd, argp); 1355 case NILFS_IOCTL_RESIZE: 1356 return nilfs_ioctl_resize(inode, filp, argp); 1357 case NILFS_IOCTL_SET_ALLOC_RANGE: 1358 return nilfs_ioctl_set_alloc_range(inode, argp); 1359 case FITRIM: 1360 return nilfs_ioctl_trim_fs(inode, argp); 1361 case FS_IOC_GETFSLABEL: 1362 return nilfs_ioctl_get_fslabel(inode->i_sb, argp); 1363 case FS_IOC_SETFSLABEL: 1364 return nilfs_ioctl_set_fslabel(inode->i_sb, filp, argp); 1365 default: 1366 return -ENOTTY; 1367 } 1368 } 1369 1370 #ifdef CONFIG_COMPAT 1371 long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1372 { 1373 switch (cmd) { 1374 case FS_IOC32_GETVERSION: 1375 cmd = FS_IOC_GETVERSION; 1376 break; 1377 case NILFS_IOCTL_CHANGE_CPMODE: 1378 case NILFS_IOCTL_DELETE_CHECKPOINT: 1379 case NILFS_IOCTL_GET_CPINFO: 1380 case NILFS_IOCTL_GET_CPSTAT: 1381 case NILFS_IOCTL_GET_SUINFO: 1382 case NILFS_IOCTL_SET_SUINFO: 1383 case NILFS_IOCTL_GET_SUSTAT: 1384 case NILFS_IOCTL_GET_VINFO: 1385 case NILFS_IOCTL_GET_BDESCS: 1386 case NILFS_IOCTL_CLEAN_SEGMENTS: 1387 case NILFS_IOCTL_SYNC: 1388 case NILFS_IOCTL_RESIZE: 1389 case NILFS_IOCTL_SET_ALLOC_RANGE: 1390 case FITRIM: 1391 case FS_IOC_GETFSLABEL: 1392 case FS_IOC_SETFSLABEL: 1393 break; 1394 default: 1395 return -ENOIOCTLCMD; 1396 } 1397 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 1398 } 1399 #endif 1400