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. 37 * 38 * Return Value: On success, 0 is returned and requested metadata info 39 * is copied into userspace. On error, one of the following 40 * negative error codes is returned. 41 * 42 * %-EINVAL - Invalid arguments from userspace. 43 * 44 * %-ENOMEM - Insufficient amount of memory available. 45 * 46 * %-EFAULT - Failure during execution of requested operation. 47 */ 48 static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, 49 struct nilfs_argv *argv, int dir, 50 ssize_t (*dofunc)(struct the_nilfs *, 51 __u64 *, int, 52 void *, size_t, size_t)) 53 { 54 void *buf; 55 void __user *base = (void __user *)(unsigned long)argv->v_base; 56 size_t maxmembs, total, n; 57 ssize_t nr; 58 int ret, i; 59 __u64 pos, ppos; 60 61 if (argv->v_nmembs == 0) 62 return 0; 63 64 if ((size_t)argv->v_size > PAGE_SIZE) 65 return -EINVAL; 66 67 /* 68 * Reject pairs of a start item position (argv->v_index) and a 69 * total count (argv->v_nmembs) which leads position 'pos' to 70 * overflow by the increment at the end of the loop. 71 */ 72 if (argv->v_index > ~(__u64)0 - argv->v_nmembs) 73 return -EINVAL; 74 75 buf = (void *)get_zeroed_page(GFP_NOFS); 76 if (unlikely(!buf)) 77 return -ENOMEM; 78 maxmembs = PAGE_SIZE / argv->v_size; 79 80 ret = 0; 81 total = 0; 82 pos = argv->v_index; 83 for (i = 0; i < argv->v_nmembs; i += n) { 84 n = (argv->v_nmembs - i < maxmembs) ? 85 argv->v_nmembs - i : maxmembs; 86 if ((dir & _IOC_WRITE) && 87 copy_from_user(buf, base + argv->v_size * i, 88 argv->v_size * n)) { 89 ret = -EFAULT; 90 break; 91 } 92 ppos = pos; 93 nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, 94 n); 95 if (nr < 0) { 96 ret = nr; 97 break; 98 } 99 if ((dir & _IOC_READ) && 100 copy_to_user(base + argv->v_size * i, buf, 101 argv->v_size * nr)) { 102 ret = -EFAULT; 103 break; 104 } 105 total += nr; 106 if ((size_t)nr < n) 107 break; 108 if (pos == ppos) 109 pos += n; 110 } 111 argv->v_nmembs = total; 112 113 free_pages((unsigned long)buf, 0); 114 return ret; 115 } 116 117 /** 118 * nilfs_fileattr_get - retrieve miscellaneous file attributes 119 * @dentry: the object to retrieve from 120 * @fa: fileattr pointer 121 * 122 * Return: always 0 as success. 123 */ 124 int nilfs_fileattr_get(struct dentry *dentry, struct fileattr *fa) 125 { 126 struct inode *inode = d_inode(dentry); 127 128 fileattr_fill_flags(fa, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE); 129 130 return 0; 131 } 132 133 /** 134 * nilfs_fileattr_set - change miscellaneous file attributes 135 * @idmap: idmap of the mount 136 * @dentry: the object to change 137 * @fa: fileattr pointer 138 * 139 * Return: 0 on success, or a negative error code on failure. 140 */ 141 int nilfs_fileattr_set(struct mnt_idmap *idmap, 142 struct dentry *dentry, struct fileattr *fa) 143 { 144 struct inode *inode = d_inode(dentry); 145 struct nilfs_transaction_info ti; 146 unsigned int flags, oldflags; 147 int ret; 148 149 if (fileattr_has_fsx(fa)) 150 return -EOPNOTSUPP; 151 152 flags = nilfs_mask_flags(inode->i_mode, fa->flags); 153 154 ret = nilfs_transaction_begin(inode->i_sb, &ti, 0); 155 if (ret) 156 return ret; 157 158 oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE; 159 NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE); 160 161 nilfs_set_inode_flags(inode); 162 inode_set_ctime_current(inode); 163 if (IS_SYNC(inode)) 164 nilfs_set_transaction_flag(NILFS_TI_SYNC); 165 166 nilfs_mark_inode_dirty(inode); 167 return nilfs_transaction_commit(inode->i_sb); 168 } 169 170 /** 171 * nilfs_ioctl_getversion - get info about a file's version (generation number) 172 * @inode: inode object 173 * @argp: userspace memory where the generation number of @inode is stored 174 * 175 * Return: 0 on success, or %-EFAULT on error. 176 */ 177 static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp) 178 { 179 return put_user(inode->i_generation, (int __user *)argp); 180 } 181 182 /** 183 * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot) 184 * @inode: inode object 185 * @filp: file object 186 * @cmd: ioctl's request code 187 * @argp: pointer on argument from userspace 188 * 189 * Description: nilfs_ioctl_change_cpmode() function changes mode of 190 * given checkpoint between checkpoint and snapshot state. This ioctl 191 * is used in chcp and mkcp utilities. 192 * 193 * Return Value: On success, 0 is returned and mode of a checkpoint is 194 * changed. On error, one of the following negative error codes 195 * is returned. 196 * 197 * %-EPERM - Operation not permitted. 198 * 199 * %-EFAULT - Failure during checkpoint mode changing. 200 */ 201 static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, 202 unsigned int cmd, void __user *argp) 203 { 204 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 205 struct nilfs_transaction_info ti; 206 struct nilfs_cpmode cpmode; 207 int ret; 208 209 if (!capable(CAP_SYS_ADMIN)) 210 return -EPERM; 211 212 ret = mnt_want_write_file(filp); 213 if (ret) 214 return ret; 215 216 ret = -EFAULT; 217 if (copy_from_user(&cpmode, argp, sizeof(cpmode))) 218 goto out; 219 220 mutex_lock(&nilfs->ns_snapshot_mount_mutex); 221 222 nilfs_transaction_begin(inode->i_sb, &ti, 0); 223 ret = nilfs_cpfile_change_cpmode( 224 nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode); 225 if (unlikely(ret < 0)) 226 nilfs_transaction_abort(inode->i_sb); 227 else 228 nilfs_transaction_commit(inode->i_sb); /* never fails */ 229 230 mutex_unlock(&nilfs->ns_snapshot_mount_mutex); 231 out: 232 mnt_drop_write_file(filp); 233 return ret; 234 } 235 236 /** 237 * nilfs_ioctl_delete_checkpoint - remove checkpoint 238 * @inode: inode object 239 * @filp: file object 240 * @cmd: ioctl's request code 241 * @argp: pointer on argument from userspace 242 * 243 * Description: nilfs_ioctl_delete_checkpoint() function removes 244 * checkpoint from NILFS2 file system. This ioctl is used in rmcp 245 * utility. 246 * 247 * Return Value: On success, 0 is returned and a checkpoint is 248 * removed. On error, one of the following negative error codes 249 * is returned. 250 * 251 * %-EPERM - Operation not permitted. 252 * 253 * %-EFAULT - Failure during checkpoint removing. 254 */ 255 static int 256 nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, 257 unsigned int cmd, void __user *argp) 258 { 259 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 260 struct nilfs_transaction_info ti; 261 __u64 cno; 262 int ret; 263 264 if (!capable(CAP_SYS_ADMIN)) 265 return -EPERM; 266 267 ret = mnt_want_write_file(filp); 268 if (ret) 269 return ret; 270 271 ret = -EFAULT; 272 if (copy_from_user(&cno, argp, sizeof(cno))) 273 goto out; 274 275 nilfs_transaction_begin(inode->i_sb, &ti, 0); 276 ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno); 277 if (unlikely(ret < 0)) 278 nilfs_transaction_abort(inode->i_sb); 279 else 280 nilfs_transaction_commit(inode->i_sb); /* never fails */ 281 out: 282 mnt_drop_write_file(filp); 283 return ret; 284 } 285 286 /** 287 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints 288 * @nilfs: nilfs object 289 * @posp: pointer on array of checkpoint's numbers 290 * @flags: checkpoint mode (checkpoint or snapshot) 291 * @buf: buffer for storing checkponts' info 292 * @size: size in bytes of one checkpoint info item in array 293 * @nmembs: number of checkpoints in array (numbers and infos) 294 * 295 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about 296 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in 297 * lscp utility and by nilfs_cleanerd daemon. 298 * 299 * Return value: count of nilfs_cpinfo structures in output buffer. 300 */ 301 static ssize_t 302 nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 303 void *buf, size_t size, size_t nmembs) 304 { 305 int ret; 306 307 down_read(&nilfs->ns_segctor_sem); 308 ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, 309 size, nmembs); 310 up_read(&nilfs->ns_segctor_sem); 311 return ret; 312 } 313 314 /** 315 * nilfs_ioctl_get_cpstat - get checkpoints statistics 316 * @inode: inode object 317 * @filp: file object 318 * @cmd: ioctl's request code 319 * @argp: pointer on argument from userspace 320 * 321 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints. 322 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities 323 * and by nilfs_cleanerd daemon. 324 * 325 * Return Value: On success, 0 is returned, and checkpoints information is 326 * copied into userspace pointer @argp. On error, one of the following 327 * negative error codes is returned. 328 * 329 * %-EIO - I/O error. 330 * 331 * %-ENOMEM - Insufficient amount of memory available. 332 * 333 * %-EFAULT - Failure during getting checkpoints statistics. 334 */ 335 static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, 336 unsigned int cmd, void __user *argp) 337 { 338 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 339 struct nilfs_cpstat cpstat; 340 int ret; 341 342 down_read(&nilfs->ns_segctor_sem); 343 ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); 344 up_read(&nilfs->ns_segctor_sem); 345 if (ret < 0) 346 return ret; 347 348 if (copy_to_user(argp, &cpstat, sizeof(cpstat))) 349 ret = -EFAULT; 350 return ret; 351 } 352 353 /** 354 * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info 355 * @nilfs: nilfs object 356 * @posp: pointer on array of segment numbers 357 * @flags: *not used* 358 * @buf: buffer for storing suinfo array 359 * @size: size in bytes of one suinfo item in array 360 * @nmembs: count of segment numbers and suinfos in array 361 * 362 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage 363 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used 364 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon. 365 * 366 * Return value: count of nilfs_suinfo structures in output buffer. 367 */ 368 static ssize_t 369 nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 370 void *buf, size_t size, size_t nmembs) 371 { 372 int ret; 373 374 down_read(&nilfs->ns_segctor_sem); 375 ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, 376 nmembs); 377 up_read(&nilfs->ns_segctor_sem); 378 return ret; 379 } 380 381 /** 382 * nilfs_ioctl_get_sustat - get segment usage statistics 383 * @inode: inode object 384 * @filp: file object 385 * @cmd: ioctl's request code 386 * @argp: pointer on argument from userspace 387 * 388 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics. 389 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities 390 * and by nilfs_cleanerd daemon. 391 * 392 * Return Value: On success, 0 is returned, and segment usage information is 393 * copied into userspace pointer @argp. On error, one of the following 394 * negative error codes is returned. 395 * 396 * %-EIO - I/O error. 397 * 398 * %-ENOMEM - Insufficient amount of memory available. 399 * 400 * %-EFAULT - Failure during getting segment usage statistics. 401 */ 402 static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, 403 unsigned int cmd, void __user *argp) 404 { 405 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 406 struct nilfs_sustat sustat; 407 int ret; 408 409 down_read(&nilfs->ns_segctor_sem); 410 ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); 411 up_read(&nilfs->ns_segctor_sem); 412 if (ret < 0) 413 return ret; 414 415 if (copy_to_user(argp, &sustat, sizeof(sustat))) 416 ret = -EFAULT; 417 return ret; 418 } 419 420 /** 421 * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info 422 * @nilfs: nilfs object 423 * @posp: *not used* 424 * @flags: *not used* 425 * @buf: buffer for storing array of nilfs_vinfo structures 426 * @size: size in bytes of one vinfo item in array 427 * @nmembs: count of vinfos in array 428 * 429 * Description: nilfs_ioctl_do_get_vinfo() function returns information 430 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used 431 * by nilfs_cleanerd daemon. 432 * 433 * Return value: count of nilfs_vinfo structures in output buffer. 434 */ 435 static ssize_t 436 nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 437 void *buf, size_t size, size_t nmembs) 438 { 439 int ret; 440 441 down_read(&nilfs->ns_segctor_sem); 442 ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); 443 up_read(&nilfs->ns_segctor_sem); 444 return ret; 445 } 446 447 /** 448 * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors 449 * @nilfs: nilfs object 450 * @posp: *not used* 451 * @flags: *not used* 452 * @buf: buffer for storing array of nilfs_bdesc structures 453 * @size: size in bytes of one bdesc item in array 454 * @nmembs: count of bdescs in array 455 * 456 * Description: nilfs_ioctl_do_get_bdescs() function returns information 457 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 458 * is used by nilfs_cleanerd daemon. 459 * 460 * Return value: count of nilfs_bdescs structures in output buffer. 461 */ 462 static ssize_t 463 nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, 464 void *buf, size_t size, size_t nmembs) 465 { 466 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 467 struct nilfs_bdesc *bdescs = buf; 468 int ret, i; 469 470 down_read(&nilfs->ns_segctor_sem); 471 for (i = 0; i < nmembs; i++) { 472 ret = nilfs_bmap_lookup_at_level(bmap, 473 bdescs[i].bd_offset, 474 bdescs[i].bd_level + 1, 475 &bdescs[i].bd_blocknr); 476 if (ret < 0) { 477 if (ret != -ENOENT) { 478 up_read(&nilfs->ns_segctor_sem); 479 return ret; 480 } 481 bdescs[i].bd_blocknr = 0; 482 } 483 } 484 up_read(&nilfs->ns_segctor_sem); 485 return nmembs; 486 } 487 488 /** 489 * nilfs_ioctl_get_bdescs - get disk block descriptors 490 * @inode: inode object 491 * @filp: file object 492 * @cmd: ioctl's request code 493 * @argp: pointer on argument from userspace 494 * 495 * Description: nilfs_ioctl_do_get_bdescs() function returns information 496 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 497 * is used by nilfs_cleanerd daemon. 498 * 499 * Return Value: On success, 0 is returned, and disk block descriptors are 500 * copied into userspace pointer @argp. On error, one of the following 501 * negative error codes is returned. 502 * 503 * %-EINVAL - Invalid arguments from userspace. 504 * 505 * %-EIO - I/O error. 506 * 507 * %-ENOMEM - Insufficient amount of memory available. 508 * 509 * %-EFAULT - Failure during getting disk block descriptors. 510 */ 511 static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, 512 unsigned int cmd, void __user *argp) 513 { 514 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 515 struct nilfs_argv argv; 516 int ret; 517 518 if (copy_from_user(&argv, argp, sizeof(argv))) 519 return -EFAULT; 520 521 if (argv.v_size != sizeof(struct nilfs_bdesc)) 522 return -EINVAL; 523 524 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), 525 nilfs_ioctl_do_get_bdescs); 526 if (ret < 0) 527 return ret; 528 529 if (copy_to_user(argp, &argv, sizeof(argv))) 530 ret = -EFAULT; 531 return ret; 532 } 533 534 /** 535 * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC 536 * @inode: inode object 537 * @vdesc: descriptor of virtual block number 538 * @buffers: list of moving buffers 539 * 540 * Description: nilfs_ioctl_move_inode_block() function registers data/node 541 * buffer in the GC pagecache and submit read request. 542 * 543 * Return Value: On success, 0 is returned. On error, one of the following 544 * negative error codes is returned. 545 * 546 * %-EIO - I/O error. 547 * 548 * %-ENOMEM - Insufficient amount of memory available. 549 * 550 * %-ENOENT - Requested block doesn't exist. 551 * 552 * %-EEXIST - Blocks conflict is detected. 553 */ 554 static int nilfs_ioctl_move_inode_block(struct inode *inode, 555 struct nilfs_vdesc *vdesc, 556 struct list_head *buffers) 557 { 558 struct buffer_head *bh; 559 int ret; 560 561 if (vdesc->vd_flags == 0) 562 ret = nilfs_gccache_submit_read_data( 563 inode, vdesc->vd_offset, vdesc->vd_blocknr, 564 vdesc->vd_vblocknr, &bh); 565 else 566 ret = nilfs_gccache_submit_read_node( 567 inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); 568 569 if (unlikely(ret < 0)) { 570 if (ret == -ENOENT) 571 nilfs_crit(inode->i_sb, 572 "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu", 573 __func__, vdesc->vd_flags ? "node" : "data", 574 (unsigned long long)vdesc->vd_ino, 575 (unsigned long long)vdesc->vd_cno, 576 (unsigned long long)vdesc->vd_offset, 577 (unsigned long long)vdesc->vd_blocknr, 578 (unsigned long long)vdesc->vd_vblocknr); 579 return ret; 580 } 581 if (unlikely(!list_empty(&bh->b_assoc_buffers))) { 582 nilfs_crit(inode->i_sb, 583 "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu", 584 __func__, vdesc->vd_flags ? "node" : "data", 585 (unsigned long long)vdesc->vd_ino, 586 (unsigned long long)vdesc->vd_cno, 587 (unsigned long long)vdesc->vd_offset, 588 (unsigned long long)vdesc->vd_blocknr, 589 (unsigned long long)vdesc->vd_vblocknr); 590 brelse(bh); 591 return -EEXIST; 592 } 593 list_add_tail(&bh->b_assoc_buffers, buffers); 594 return 0; 595 } 596 597 /** 598 * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection 599 * @sb: superblock object 600 * @argv: vector of arguments from userspace 601 * @buf: array of nilfs_vdesc structures 602 * 603 * Description: nilfs_ioctl_move_blocks() function reads valid data/node 604 * blocks that garbage collector specified with the array of nilfs_vdesc 605 * structures and stores them into page caches of GC inodes. 606 * 607 * Return Value: Number of processed nilfs_vdesc structures or 608 * error code, otherwise. 609 */ 610 static int nilfs_ioctl_move_blocks(struct super_block *sb, 611 struct nilfs_argv *argv, void *buf) 612 { 613 size_t nmembs = argv->v_nmembs; 614 struct the_nilfs *nilfs = sb->s_fs_info; 615 struct inode *inode; 616 struct nilfs_vdesc *vdesc; 617 struct buffer_head *bh, *n; 618 LIST_HEAD(buffers); 619 ino_t ino; 620 __u64 cno; 621 int i, ret; 622 623 for (i = 0, vdesc = buf; i < nmembs; ) { 624 ino = vdesc->vd_ino; 625 cno = vdesc->vd_cno; 626 inode = nilfs_iget_for_gc(sb, ino, cno); 627 if (IS_ERR(inode)) { 628 ret = PTR_ERR(inode); 629 goto failed; 630 } 631 if (list_empty(&NILFS_I(inode)->i_dirty)) { 632 /* 633 * Add the inode to GC inode list. Garbage Collection 634 * is serialized and no two processes manipulate the 635 * list simultaneously. 636 */ 637 igrab(inode); 638 list_add(&NILFS_I(inode)->i_dirty, 639 &nilfs->ns_gc_inodes); 640 } 641 642 do { 643 ret = nilfs_ioctl_move_inode_block(inode, vdesc, 644 &buffers); 645 if (unlikely(ret < 0)) { 646 iput(inode); 647 goto failed; 648 } 649 vdesc++; 650 } while (++i < nmembs && 651 vdesc->vd_ino == ino && vdesc->vd_cno == cno); 652 653 iput(inode); /* The inode still remains in GC inode list */ 654 } 655 656 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 657 ret = nilfs_gccache_wait_and_mark_dirty(bh); 658 if (unlikely(ret < 0)) { 659 WARN_ON(ret == -EEXIST); 660 goto failed; 661 } 662 list_del_init(&bh->b_assoc_buffers); 663 brelse(bh); 664 } 665 return nmembs; 666 667 failed: 668 list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 669 list_del_init(&bh->b_assoc_buffers); 670 brelse(bh); 671 } 672 return ret; 673 } 674 675 /** 676 * nilfs_ioctl_delete_checkpoints - delete checkpoints 677 * @nilfs: nilfs object 678 * @argv: vector of arguments from userspace 679 * @buf: array of periods of checkpoints numbers 680 * 681 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints 682 * in the period from p_start to p_end, excluding p_end itself. The checkpoints 683 * which have been already deleted are ignored. 684 * 685 * Return Value: Number of processed nilfs_period structures or 686 * error code, otherwise. 687 * 688 * %-EIO - I/O error. 689 * 690 * %-ENOMEM - Insufficient amount of memory available. 691 * 692 * %-EINVAL - invalid checkpoints. 693 */ 694 static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, 695 struct nilfs_argv *argv, void *buf) 696 { 697 size_t nmembs = argv->v_nmembs; 698 struct inode *cpfile = nilfs->ns_cpfile; 699 struct nilfs_period *periods = buf; 700 int ret, i; 701 702 for (i = 0; i < nmembs; i++) { 703 ret = nilfs_cpfile_delete_checkpoints( 704 cpfile, periods[i].p_start, periods[i].p_end); 705 if (ret < 0) 706 return ret; 707 } 708 return nmembs; 709 } 710 711 /** 712 * nilfs_ioctl_free_vblocknrs - free virtual block numbers 713 * @nilfs: nilfs object 714 * @argv: vector of arguments from userspace 715 * @buf: array of virtual block numbers 716 * 717 * Description: nilfs_ioctl_free_vblocknrs() function frees 718 * the virtual block numbers specified by @buf and @argv->v_nmembs. 719 * 720 * Return Value: Number of processed virtual block numbers or 721 * error code, otherwise. 722 * 723 * %-EIO - I/O error. 724 * 725 * %-ENOMEM - Insufficient amount of memory available. 726 * 727 * %-ENOENT - The virtual block number have not been allocated. 728 */ 729 static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, 730 struct nilfs_argv *argv, void *buf) 731 { 732 size_t nmembs = argv->v_nmembs; 733 int ret; 734 735 ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); 736 737 return (ret < 0) ? ret : nmembs; 738 } 739 740 /** 741 * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty 742 * @nilfs: nilfs object 743 * @argv: vector of arguments from userspace 744 * @buf: array of block descriptors 745 * 746 * Description: nilfs_ioctl_mark_blocks_dirty() function marks 747 * metadata file or data blocks as dirty. 748 * 749 * Return Value: Number of processed block descriptors or 750 * error code, otherwise. 751 * 752 * %-ENOMEM - Insufficient memory available. 753 * 754 * %-EIO - I/O error 755 * 756 * %-ENOENT - the specified block does not exist (hole block) 757 */ 758 static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, 759 struct nilfs_argv *argv, void *buf) 760 { 761 size_t nmembs = argv->v_nmembs; 762 struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 763 struct nilfs_bdesc *bdescs = buf; 764 struct buffer_head *bh; 765 int ret, i; 766 767 for (i = 0; i < nmembs; i++) { 768 /* XXX: use macro or inline func to check liveness */ 769 ret = nilfs_bmap_lookup_at_level(bmap, 770 bdescs[i].bd_offset, 771 bdescs[i].bd_level + 1, 772 &bdescs[i].bd_blocknr); 773 if (ret < 0) { 774 if (ret != -ENOENT) 775 return ret; 776 bdescs[i].bd_blocknr = 0; 777 } 778 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) 779 /* skip dead block */ 780 continue; 781 if (bdescs[i].bd_level == 0) { 782 ret = nilfs_mdt_get_block(nilfs->ns_dat, 783 bdescs[i].bd_offset, 784 false, NULL, &bh); 785 if (unlikely(ret)) { 786 WARN_ON(ret == -ENOENT); 787 return ret; 788 } 789 mark_buffer_dirty(bh); 790 nilfs_mdt_mark_dirty(nilfs->ns_dat); 791 put_bh(bh); 792 } else { 793 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, 794 bdescs[i].bd_level); 795 if (ret < 0) { 796 WARN_ON(ret == -ENOENT); 797 return ret; 798 } 799 } 800 } 801 return nmembs; 802 } 803 804 int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, 805 struct nilfs_argv *argv, void **kbufs) 806 { 807 const char *msg; 808 int ret; 809 810 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); 811 if (ret < 0) { 812 /* 813 * can safely abort because checkpoints can be removed 814 * independently. 815 */ 816 msg = "cannot delete checkpoints"; 817 goto failed; 818 } 819 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); 820 if (ret < 0) { 821 /* 822 * can safely abort because DAT file is updated atomically 823 * using a copy-on-write technique. 824 */ 825 msg = "cannot delete virtual blocks from DAT file"; 826 goto failed; 827 } 828 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); 829 if (ret < 0) { 830 /* 831 * can safely abort because the operation is nondestructive. 832 */ 833 msg = "cannot mark copying blocks dirty"; 834 goto failed; 835 } 836 return 0; 837 838 failed: 839 nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg); 840 return ret; 841 } 842 843 /** 844 * nilfs_ioctl_clean_segments - clean segments 845 * @inode: inode object 846 * @filp: file object 847 * @cmd: ioctl's request code 848 * @argp: pointer on argument from userspace 849 * 850 * Description: nilfs_ioctl_clean_segments() function makes garbage 851 * collection operation in the environment of requested parameters 852 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by 853 * nilfs_cleanerd daemon. 854 * 855 * Return Value: On success, 0 is returned or error code, otherwise. 856 */ 857 static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, 858 unsigned int cmd, void __user *argp) 859 { 860 struct nilfs_argv argv[5]; 861 static const size_t argsz[5] = { 862 sizeof(struct nilfs_vdesc), 863 sizeof(struct nilfs_period), 864 sizeof(__u64), 865 sizeof(struct nilfs_bdesc), 866 sizeof(__u64), 867 }; 868 void __user *base; 869 void *kbufs[5]; 870 struct the_nilfs *nilfs; 871 size_t len, nsegs; 872 int n, ret; 873 874 if (!capable(CAP_SYS_ADMIN)) 875 return -EPERM; 876 877 ret = mnt_want_write_file(filp); 878 if (ret) 879 return ret; 880 881 ret = -EFAULT; 882 if (copy_from_user(argv, argp, sizeof(argv))) 883 goto out; 884 885 ret = -EINVAL; 886 nsegs = argv[4].v_nmembs; 887 if (argv[4].v_size != argsz[4]) 888 goto out; 889 890 /* 891 * argv[4] points to segment numbers this ioctl cleans. We 892 * use kmalloc() for its buffer because the memory used for the 893 * segment numbers is small enough. 894 */ 895 kbufs[4] = memdup_array_user((void __user *)(unsigned long)argv[4].v_base, 896 nsegs, sizeof(__u64)); 897 if (IS_ERR(kbufs[4])) { 898 ret = PTR_ERR(kbufs[4]); 899 goto out; 900 } 901 nilfs = inode->i_sb->s_fs_info; 902 903 for (n = 0; n < 4; n++) { 904 ret = -EINVAL; 905 if (argv[n].v_size != argsz[n]) 906 goto out_free; 907 908 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) 909 goto out_free; 910 911 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size) 912 goto out_free; 913 914 len = argv[n].v_size * argv[n].v_nmembs; 915 base = (void __user *)(unsigned long)argv[n].v_base; 916 if (len == 0) { 917 kbufs[n] = NULL; 918 continue; 919 } 920 921 kbufs[n] = vmalloc(len); 922 if (!kbufs[n]) { 923 ret = -ENOMEM; 924 goto out_free; 925 } 926 if (copy_from_user(kbufs[n], base, len)) { 927 ret = -EFAULT; 928 vfree(kbufs[n]); 929 goto out_free; 930 } 931 } 932 933 /* 934 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), 935 * which will operates an inode list without blocking. 936 * To protect the list from concurrent operations, 937 * nilfs_ioctl_move_blocks should be atomic operation. 938 */ 939 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { 940 ret = -EBUSY; 941 goto out_free; 942 } 943 944 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); 945 if (ret < 0) { 946 nilfs_err(inode->i_sb, 947 "error %d preparing GC: cannot read source blocks", 948 ret); 949 } else { 950 if (nilfs_sb_need_update(nilfs)) 951 set_nilfs_discontinued(nilfs); 952 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); 953 } 954 955 nilfs_remove_all_gcinodes(nilfs); 956 clear_nilfs_gc_running(nilfs); 957 958 out_free: 959 while (--n >= 0) 960 vfree(kbufs[n]); 961 kfree(kbufs[4]); 962 out: 963 mnt_drop_write_file(filp); 964 return ret; 965 } 966 967 /** 968 * nilfs_ioctl_sync - make a checkpoint 969 * @inode: inode object 970 * @filp: file object 971 * @cmd: ioctl's request code 972 * @argp: pointer on argument from userspace 973 * 974 * Description: nilfs_ioctl_sync() function constructs a logical segment 975 * for checkpointing. This function guarantees that all modified data 976 * and metadata are written out to the device when it successfully 977 * returned. 978 * 979 * Return Value: On success, 0 is retured. On errors, one of the following 980 * negative error code is returned. 981 * 982 * %-EROFS - Read only filesystem. 983 * 984 * %-EIO - I/O error 985 * 986 * %-ENOSPC - No space left on device (only in a panic state). 987 * 988 * %-ERESTARTSYS - Interrupted. 989 * 990 * %-ENOMEM - Insufficient memory available. 991 * 992 * %-EFAULT - Failure during execution of requested operation. 993 */ 994 static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, 995 unsigned int cmd, void __user *argp) 996 { 997 __u64 cno; 998 int ret; 999 struct the_nilfs *nilfs; 1000 1001 ret = nilfs_construct_segment(inode->i_sb); 1002 if (ret < 0) 1003 return ret; 1004 1005 nilfs = inode->i_sb->s_fs_info; 1006 ret = nilfs_flush_device(nilfs); 1007 if (ret < 0) 1008 return ret; 1009 1010 if (argp != NULL) { 1011 down_read(&nilfs->ns_segctor_sem); 1012 cno = nilfs->ns_cno - 1; 1013 up_read(&nilfs->ns_segctor_sem); 1014 if (copy_to_user(argp, &cno, sizeof(cno))) 1015 return -EFAULT; 1016 } 1017 return 0; 1018 } 1019 1020 /** 1021 * nilfs_ioctl_resize - resize NILFS2 volume 1022 * @inode: inode object 1023 * @filp: file object 1024 * @argp: pointer on argument from userspace 1025 * 1026 * Return Value: On success, 0 is returned or error code, otherwise. 1027 */ 1028 static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, 1029 void __user *argp) 1030 { 1031 __u64 newsize; 1032 int ret = -EPERM; 1033 1034 if (!capable(CAP_SYS_ADMIN)) 1035 goto out; 1036 1037 ret = mnt_want_write_file(filp); 1038 if (ret) 1039 goto out; 1040 1041 ret = -EFAULT; 1042 if (copy_from_user(&newsize, argp, sizeof(newsize))) 1043 goto out_drop_write; 1044 1045 ret = nilfs_resize_fs(inode->i_sb, newsize); 1046 1047 out_drop_write: 1048 mnt_drop_write_file(filp); 1049 out: 1050 return ret; 1051 } 1052 1053 /** 1054 * nilfs_ioctl_trim_fs() - trim ioctl handle function 1055 * @inode: inode object 1056 * @argp: pointer on argument from userspace 1057 * 1058 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It 1059 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which 1060 * performs the actual trim operation. 1061 * 1062 * Return Value: On success, 0 is returned or negative error code, otherwise. 1063 */ 1064 static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp) 1065 { 1066 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1067 struct fstrim_range range; 1068 int ret; 1069 1070 if (!capable(CAP_SYS_ADMIN)) 1071 return -EPERM; 1072 1073 if (!bdev_max_discard_sectors(nilfs->ns_bdev)) 1074 return -EOPNOTSUPP; 1075 1076 if (copy_from_user(&range, argp, sizeof(range))) 1077 return -EFAULT; 1078 1079 range.minlen = max_t(u64, range.minlen, 1080 bdev_discard_granularity(nilfs->ns_bdev)); 1081 1082 down_read(&nilfs->ns_segctor_sem); 1083 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range); 1084 up_read(&nilfs->ns_segctor_sem); 1085 1086 if (ret < 0) 1087 return ret; 1088 1089 if (copy_to_user(argp, &range, sizeof(range))) 1090 return -EFAULT; 1091 1092 return 0; 1093 } 1094 1095 /** 1096 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated 1097 * @inode: inode object 1098 * @argp: pointer on argument from userspace 1099 * 1100 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit 1101 * of segments in bytes and upper limit of segments in bytes. 1102 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility. 1103 * 1104 * Return Value: On success, 0 is returned or error code, otherwise. 1105 */ 1106 static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) 1107 { 1108 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1109 __u64 range[2]; 1110 __u64 minseg, maxseg; 1111 unsigned long segbytes; 1112 int ret = -EPERM; 1113 1114 if (!capable(CAP_SYS_ADMIN)) 1115 goto out; 1116 1117 ret = -EFAULT; 1118 if (copy_from_user(range, argp, sizeof(__u64[2]))) 1119 goto out; 1120 1121 ret = -ERANGE; 1122 if (range[1] > bdev_nr_bytes(inode->i_sb->s_bdev)) 1123 goto out; 1124 1125 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; 1126 1127 minseg = range[0] + segbytes - 1; 1128 minseg = div64_ul(minseg, segbytes); 1129 1130 if (range[1] < 4096) 1131 goto out; 1132 1133 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); 1134 if (maxseg < segbytes) 1135 goto out; 1136 1137 maxseg = div64_ul(maxseg, segbytes); 1138 maxseg--; 1139 1140 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); 1141 out: 1142 return ret; 1143 } 1144 1145 /** 1146 * nilfs_ioctl_get_info - wrapping function of get metadata info 1147 * @inode: inode object 1148 * @filp: file object 1149 * @cmd: ioctl's request code 1150 * @argp: pointer on argument from userspace 1151 * @membsz: size of an item in bytes 1152 * @dofunc: concrete function of getting metadata info 1153 * 1154 * Description: nilfs_ioctl_get_info() gets metadata info by means of 1155 * calling dofunc() function. 1156 * 1157 * Return Value: On success, 0 is returned and requested metadata info 1158 * is copied into userspace. On error, one of the following 1159 * negative error codes is returned. 1160 * 1161 * %-EINVAL - Invalid arguments from userspace. 1162 * 1163 * %-ENOMEM - Insufficient amount of memory available. 1164 * 1165 * %-EFAULT - Failure during execution of requested operation. 1166 */ 1167 static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, 1168 unsigned int cmd, void __user *argp, 1169 size_t membsz, 1170 ssize_t (*dofunc)(struct the_nilfs *, 1171 __u64 *, int, 1172 void *, size_t, size_t)) 1173 1174 { 1175 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1176 struct nilfs_argv argv; 1177 int ret; 1178 1179 if (copy_from_user(&argv, argp, sizeof(argv))) 1180 return -EFAULT; 1181 1182 if (argv.v_size < membsz) 1183 return -EINVAL; 1184 1185 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); 1186 if (ret < 0) 1187 return ret; 1188 1189 if (copy_to_user(argp, &argv, sizeof(argv))) 1190 ret = -EFAULT; 1191 return ret; 1192 } 1193 1194 /** 1195 * nilfs_ioctl_set_suinfo - set segment usage info 1196 * @inode: inode object 1197 * @filp: file object 1198 * @cmd: ioctl's request code 1199 * @argp: pointer on argument from userspace 1200 * 1201 * Description: Expects an array of nilfs_suinfo_update structures 1202 * encapsulated in nilfs_argv and updates the segment usage info 1203 * according to the flags in nilfs_suinfo_update. 1204 * 1205 * Return Value: On success, 0 is returned. On error, one of the 1206 * following negative error codes is returned. 1207 * 1208 * %-EPERM - Not enough permissions 1209 * 1210 * %-EFAULT - Error copying input data 1211 * 1212 * %-EIO - I/O error. 1213 * 1214 * %-ENOMEM - Insufficient amount of memory available. 1215 * 1216 * %-EINVAL - Invalid values in input (segment number, flags or nblocks) 1217 */ 1218 static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp, 1219 unsigned int cmd, void __user *argp) 1220 { 1221 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1222 struct nilfs_transaction_info ti; 1223 struct nilfs_argv argv; 1224 size_t len; 1225 void __user *base; 1226 void *kbuf; 1227 int ret; 1228 1229 if (!capable(CAP_SYS_ADMIN)) 1230 return -EPERM; 1231 1232 ret = mnt_want_write_file(filp); 1233 if (ret) 1234 return ret; 1235 1236 ret = -EFAULT; 1237 if (copy_from_user(&argv, argp, sizeof(argv))) 1238 goto out; 1239 1240 ret = -EINVAL; 1241 if (argv.v_size < sizeof(struct nilfs_suinfo_update)) 1242 goto out; 1243 1244 if (argv.v_nmembs > nilfs->ns_nsegments) 1245 goto out; 1246 1247 if (argv.v_nmembs >= UINT_MAX / argv.v_size) 1248 goto out; 1249 1250 len = argv.v_size * argv.v_nmembs; 1251 if (!len) { 1252 ret = 0; 1253 goto out; 1254 } 1255 1256 base = (void __user *)(unsigned long)argv.v_base; 1257 kbuf = vmalloc(len); 1258 if (!kbuf) { 1259 ret = -ENOMEM; 1260 goto out; 1261 } 1262 1263 if (copy_from_user(kbuf, base, len)) { 1264 ret = -EFAULT; 1265 goto out_free; 1266 } 1267 1268 nilfs_transaction_begin(inode->i_sb, &ti, 0); 1269 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size, 1270 argv.v_nmembs); 1271 if (unlikely(ret < 0)) 1272 nilfs_transaction_abort(inode->i_sb); 1273 else 1274 nilfs_transaction_commit(inode->i_sb); /* never fails */ 1275 1276 out_free: 1277 vfree(kbuf); 1278 out: 1279 mnt_drop_write_file(filp); 1280 return ret; 1281 } 1282 1283 /** 1284 * nilfs_ioctl_get_fslabel - get the volume name of the file system 1285 * @sb: super block instance 1286 * @argp: pointer to userspace memory where the volume name should be stored 1287 * 1288 * Return: 0 on success, %-EFAULT if copying to userspace memory fails. 1289 */ 1290 static int nilfs_ioctl_get_fslabel(struct super_block *sb, void __user *argp) 1291 { 1292 struct the_nilfs *nilfs = sb->s_fs_info; 1293 char label[NILFS_MAX_VOLUME_NAME + 1]; 1294 1295 BUILD_BUG_ON(NILFS_MAX_VOLUME_NAME >= FSLABEL_MAX); 1296 1297 down_read(&nilfs->ns_sem); 1298 memtostr_pad(label, nilfs->ns_sbp[0]->s_volume_name); 1299 up_read(&nilfs->ns_sem); 1300 1301 if (copy_to_user(argp, label, sizeof(label))) 1302 return -EFAULT; 1303 return 0; 1304 } 1305 1306 /** 1307 * nilfs_ioctl_set_fslabel - set the volume name of the file system 1308 * @sb: super block instance 1309 * @filp: file object 1310 * @argp: pointer to userspace memory that contains the volume name 1311 * 1312 * Return: 0 on success, or the following negative error code on failure. 1313 * * %-EFAULT - Error copying input data. 1314 * * %-EINVAL - Label length exceeds record size in superblock. 1315 * * %-EIO - I/O error. 1316 * * %-EPERM - Operation not permitted (insufficient permissions). 1317 * * %-EROFS - Read only file system. 1318 */ 1319 static int nilfs_ioctl_set_fslabel(struct super_block *sb, struct file *filp, 1320 void __user *argp) 1321 { 1322 char label[NILFS_MAX_VOLUME_NAME + 1]; 1323 struct the_nilfs *nilfs = sb->s_fs_info; 1324 struct nilfs_super_block **sbp; 1325 size_t len; 1326 int ret; 1327 1328 if (!capable(CAP_SYS_ADMIN)) 1329 return -EPERM; 1330 1331 ret = mnt_want_write_file(filp); 1332 if (ret) 1333 return ret; 1334 1335 if (copy_from_user(label, argp, NILFS_MAX_VOLUME_NAME + 1)) { 1336 ret = -EFAULT; 1337 goto out_drop_write; 1338 } 1339 1340 len = strnlen(label, NILFS_MAX_VOLUME_NAME + 1); 1341 if (len > NILFS_MAX_VOLUME_NAME) { 1342 nilfs_err(sb, "unable to set label with more than %zu bytes", 1343 NILFS_MAX_VOLUME_NAME); 1344 ret = -EINVAL; 1345 goto out_drop_write; 1346 } 1347 1348 down_write(&nilfs->ns_sem); 1349 sbp = nilfs_prepare_super(sb, false); 1350 if (unlikely(!sbp)) { 1351 ret = -EIO; 1352 goto out_unlock; 1353 } 1354 1355 strtomem_pad(sbp[0]->s_volume_name, label, 0); 1356 if (sbp[1]) 1357 strtomem_pad(sbp[1]->s_volume_name, label, 0); 1358 1359 ret = nilfs_commit_super(sb, NILFS_SB_COMMIT_ALL); 1360 1361 out_unlock: 1362 up_write(&nilfs->ns_sem); 1363 out_drop_write: 1364 mnt_drop_write_file(filp); 1365 return ret; 1366 } 1367 1368 long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1369 { 1370 struct inode *inode = file_inode(filp); 1371 void __user *argp = (void __user *)arg; 1372 1373 switch (cmd) { 1374 case FS_IOC_GETVERSION: 1375 return nilfs_ioctl_getversion(inode, argp); 1376 case NILFS_IOCTL_CHANGE_CPMODE: 1377 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); 1378 case NILFS_IOCTL_DELETE_CHECKPOINT: 1379 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); 1380 case NILFS_IOCTL_GET_CPINFO: 1381 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1382 sizeof(struct nilfs_cpinfo), 1383 nilfs_ioctl_do_get_cpinfo); 1384 case NILFS_IOCTL_GET_CPSTAT: 1385 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); 1386 case NILFS_IOCTL_GET_SUINFO: 1387 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1388 sizeof(struct nilfs_suinfo), 1389 nilfs_ioctl_do_get_suinfo); 1390 case NILFS_IOCTL_SET_SUINFO: 1391 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp); 1392 case NILFS_IOCTL_GET_SUSTAT: 1393 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); 1394 case NILFS_IOCTL_GET_VINFO: 1395 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1396 sizeof(struct nilfs_vinfo), 1397 nilfs_ioctl_do_get_vinfo); 1398 case NILFS_IOCTL_GET_BDESCS: 1399 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); 1400 case NILFS_IOCTL_CLEAN_SEGMENTS: 1401 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); 1402 case NILFS_IOCTL_SYNC: 1403 return nilfs_ioctl_sync(inode, filp, cmd, argp); 1404 case NILFS_IOCTL_RESIZE: 1405 return nilfs_ioctl_resize(inode, filp, argp); 1406 case NILFS_IOCTL_SET_ALLOC_RANGE: 1407 return nilfs_ioctl_set_alloc_range(inode, argp); 1408 case FITRIM: 1409 return nilfs_ioctl_trim_fs(inode, argp); 1410 case FS_IOC_GETFSLABEL: 1411 return nilfs_ioctl_get_fslabel(inode->i_sb, argp); 1412 case FS_IOC_SETFSLABEL: 1413 return nilfs_ioctl_set_fslabel(inode->i_sb, filp, argp); 1414 default: 1415 return -ENOTTY; 1416 } 1417 } 1418 1419 #ifdef CONFIG_COMPAT 1420 long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1421 { 1422 switch (cmd) { 1423 case FS_IOC32_GETVERSION: 1424 cmd = FS_IOC_GETVERSION; 1425 break; 1426 case NILFS_IOCTL_CHANGE_CPMODE: 1427 case NILFS_IOCTL_DELETE_CHECKPOINT: 1428 case NILFS_IOCTL_GET_CPINFO: 1429 case NILFS_IOCTL_GET_CPSTAT: 1430 case NILFS_IOCTL_GET_SUINFO: 1431 case NILFS_IOCTL_SET_SUINFO: 1432 case NILFS_IOCTL_GET_SUSTAT: 1433 case NILFS_IOCTL_GET_VINFO: 1434 case NILFS_IOCTL_GET_BDESCS: 1435 case NILFS_IOCTL_CLEAN_SEGMENTS: 1436 case NILFS_IOCTL_SYNC: 1437 case NILFS_IOCTL_RESIZE: 1438 case NILFS_IOCTL_SET_ALLOC_RANGE: 1439 case FITRIM: 1440 case FS_IOC_GETFSLABEL: 1441 case FS_IOC_SETFSLABEL: 1442 break; 1443 default: 1444 return -ENOIOCTLCMD; 1445 } 1446 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 1447 } 1448 #endif 1449