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 = (void __user *)(unsigned long)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 fileattr *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 fileattr *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 /* XXX: use macro or inline func to check liveness */ 740 ret = nilfs_bmap_lookup_at_level(bmap, 741 bdescs[i].bd_offset, 742 bdescs[i].bd_level + 1, 743 &bdescs[i].bd_blocknr); 744 if (ret < 0) { 745 if (ret != -ENOENT) 746 return ret; 747 bdescs[i].bd_blocknr = 0; 748 } 749 if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) 750 /* skip dead block */ 751 continue; 752 if (bdescs[i].bd_level == 0) { 753 ret = nilfs_mdt_get_block(nilfs->ns_dat, 754 bdescs[i].bd_offset, 755 false, NULL, &bh); 756 if (unlikely(ret)) { 757 WARN_ON(ret == -ENOENT); 758 return ret; 759 } 760 mark_buffer_dirty(bh); 761 nilfs_mdt_mark_dirty(nilfs->ns_dat); 762 put_bh(bh); 763 } else { 764 ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, 765 bdescs[i].bd_level); 766 if (ret < 0) { 767 WARN_ON(ret == -ENOENT); 768 return ret; 769 } 770 } 771 } 772 return nmembs; 773 } 774 775 int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, 776 struct nilfs_argv *argv, void **kbufs) 777 { 778 const char *msg; 779 int ret; 780 781 ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); 782 if (ret < 0) { 783 /* 784 * can safely abort because checkpoints can be removed 785 * independently. 786 */ 787 msg = "cannot delete checkpoints"; 788 goto failed; 789 } 790 ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); 791 if (ret < 0) { 792 /* 793 * can safely abort because DAT file is updated atomically 794 * using a copy-on-write technique. 795 */ 796 msg = "cannot delete virtual blocks from DAT file"; 797 goto failed; 798 } 799 ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); 800 if (ret < 0) { 801 /* 802 * can safely abort because the operation is nondestructive. 803 */ 804 msg = "cannot mark copying blocks dirty"; 805 goto failed; 806 } 807 return 0; 808 809 failed: 810 nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg); 811 return ret; 812 } 813 814 /** 815 * nilfs_ioctl_clean_segments - clean segments 816 * @inode: inode object 817 * @filp: file object 818 * @cmd: ioctl's request code 819 * @argp: pointer on argument from userspace 820 * 821 * Description: nilfs_ioctl_clean_segments() function makes garbage 822 * collection operation in the environment of requested parameters 823 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by 824 * nilfs_cleanerd daemon. 825 * 826 * Return: 0 on success, or a negative error code on failure. 827 */ 828 static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, 829 unsigned int cmd, void __user *argp) 830 { 831 struct nilfs_argv argv[5]; 832 static const size_t argsz[5] = { 833 sizeof(struct nilfs_vdesc), 834 sizeof(struct nilfs_period), 835 sizeof(__u64), 836 sizeof(struct nilfs_bdesc), 837 sizeof(__u64), 838 }; 839 void __user *base; 840 void *kbufs[5]; 841 struct the_nilfs *nilfs; 842 size_t len, nsegs; 843 int n, ret; 844 845 if (!capable(CAP_SYS_ADMIN)) 846 return -EPERM; 847 848 ret = mnt_want_write_file(filp); 849 if (ret) 850 return ret; 851 852 ret = -EFAULT; 853 if (copy_from_user(argv, argp, sizeof(argv))) 854 goto out; 855 856 ret = -EINVAL; 857 nsegs = argv[4].v_nmembs; 858 if (argv[4].v_size != argsz[4]) 859 goto out; 860 861 /* 862 * argv[4] points to segment numbers this ioctl cleans. We 863 * use kmalloc() for its buffer because the memory used for the 864 * segment numbers is small enough. 865 */ 866 kbufs[4] = memdup_array_user((void __user *)(unsigned long)argv[4].v_base, 867 nsegs, sizeof(__u64)); 868 if (IS_ERR(kbufs[4])) { 869 ret = PTR_ERR(kbufs[4]); 870 goto out; 871 } 872 nilfs = inode->i_sb->s_fs_info; 873 874 for (n = 0; n < 4; n++) { 875 ret = -EINVAL; 876 if (argv[n].v_size != argsz[n]) 877 goto out_free; 878 879 if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) 880 goto out_free; 881 882 if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size) 883 goto out_free; 884 885 len = argv[n].v_size * argv[n].v_nmembs; 886 base = (void __user *)(unsigned long)argv[n].v_base; 887 if (len == 0) { 888 kbufs[n] = NULL; 889 continue; 890 } 891 892 kbufs[n] = vmalloc(len); 893 if (!kbufs[n]) { 894 ret = -ENOMEM; 895 goto out_free; 896 } 897 if (copy_from_user(kbufs[n], base, len)) { 898 ret = -EFAULT; 899 vfree(kbufs[n]); 900 goto out_free; 901 } 902 } 903 904 /* 905 * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), 906 * which will operates an inode list without blocking. 907 * To protect the list from concurrent operations, 908 * nilfs_ioctl_move_blocks should be atomic operation. 909 */ 910 if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { 911 ret = -EBUSY; 912 goto out_free; 913 } 914 915 ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); 916 if (ret < 0) { 917 nilfs_err(inode->i_sb, 918 "error %d preparing GC: cannot read source blocks", 919 ret); 920 } else { 921 if (nilfs_sb_need_update(nilfs)) 922 set_nilfs_discontinued(nilfs); 923 ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); 924 } 925 926 nilfs_remove_all_gcinodes(nilfs); 927 clear_nilfs_gc_running(nilfs); 928 929 out_free: 930 while (--n >= 0) 931 vfree(kbufs[n]); 932 kfree(kbufs[4]); 933 out: 934 mnt_drop_write_file(filp); 935 return ret; 936 } 937 938 /** 939 * nilfs_ioctl_sync - make a checkpoint 940 * @inode: inode object 941 * @filp: file object 942 * @cmd: ioctl's request code 943 * @argp: pointer on argument from userspace 944 * 945 * Description: nilfs_ioctl_sync() function constructs a logical segment 946 * for checkpointing. This function guarantees that all modified data 947 * and metadata are written out to the device when it successfully 948 * returned. 949 * 950 * Return: 0 on success, or one of the following negative error codes on 951 * failure: 952 * * %-EFAULT - Failure during execution of requested operation. 953 * * %-EIO - I/O error. 954 * * %-ENOMEM - Insufficient memory available. 955 * * %-ENOSPC - No space left on device (only in a panic state). 956 * * %-ERESTARTSYS - Interrupted. 957 * * %-EROFS - Read only filesystem. 958 */ 959 static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, 960 unsigned int cmd, void __user *argp) 961 { 962 __u64 cno; 963 int ret; 964 struct the_nilfs *nilfs; 965 966 ret = nilfs_construct_segment(inode->i_sb); 967 if (ret < 0) 968 return ret; 969 970 nilfs = inode->i_sb->s_fs_info; 971 ret = nilfs_flush_device(nilfs); 972 if (ret < 0) 973 return ret; 974 975 if (argp != NULL) { 976 down_read(&nilfs->ns_segctor_sem); 977 cno = nilfs->ns_cno - 1; 978 up_read(&nilfs->ns_segctor_sem); 979 if (copy_to_user(argp, &cno, sizeof(cno))) 980 return -EFAULT; 981 } 982 return 0; 983 } 984 985 /** 986 * nilfs_ioctl_resize - resize NILFS2 volume 987 * @inode: inode object 988 * @filp: file object 989 * @argp: pointer on argument from userspace 990 * 991 * Return: 0 on success, or a negative error code on failure. 992 */ 993 static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, 994 void __user *argp) 995 { 996 __u64 newsize; 997 int ret = -EPERM; 998 999 if (!capable(CAP_SYS_ADMIN)) 1000 goto out; 1001 1002 ret = mnt_want_write_file(filp); 1003 if (ret) 1004 goto out; 1005 1006 ret = -EFAULT; 1007 if (copy_from_user(&newsize, argp, sizeof(newsize))) 1008 goto out_drop_write; 1009 1010 ret = nilfs_resize_fs(inode->i_sb, newsize); 1011 1012 out_drop_write: 1013 mnt_drop_write_file(filp); 1014 out: 1015 return ret; 1016 } 1017 1018 /** 1019 * nilfs_ioctl_trim_fs() - trim ioctl handle function 1020 * @inode: inode object 1021 * @argp: pointer on argument from userspace 1022 * 1023 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It 1024 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which 1025 * performs the actual trim operation. 1026 * 1027 * Return: 0 on success, or a negative error code on failure. 1028 */ 1029 static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp) 1030 { 1031 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1032 struct fstrim_range range; 1033 int ret; 1034 1035 if (!capable(CAP_SYS_ADMIN)) 1036 return -EPERM; 1037 1038 if (!bdev_max_discard_sectors(nilfs->ns_bdev)) 1039 return -EOPNOTSUPP; 1040 1041 if (copy_from_user(&range, argp, sizeof(range))) 1042 return -EFAULT; 1043 1044 range.minlen = max_t(u64, range.minlen, 1045 bdev_discard_granularity(nilfs->ns_bdev)); 1046 1047 down_read(&nilfs->ns_segctor_sem); 1048 ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range); 1049 up_read(&nilfs->ns_segctor_sem); 1050 1051 if (ret < 0) 1052 return ret; 1053 1054 if (copy_to_user(argp, &range, sizeof(range))) 1055 return -EFAULT; 1056 1057 return 0; 1058 } 1059 1060 /** 1061 * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated 1062 * @inode: inode object 1063 * @argp: pointer on argument from userspace 1064 * 1065 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit 1066 * of segments in bytes and upper limit of segments in bytes. 1067 * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility. 1068 * 1069 * Return: 0 on success, or a negative error code on failure. 1070 */ 1071 static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) 1072 { 1073 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1074 __u64 range[2]; 1075 __u64 minseg, maxseg; 1076 unsigned long segbytes; 1077 int ret = -EPERM; 1078 1079 if (!capable(CAP_SYS_ADMIN)) 1080 goto out; 1081 1082 ret = -EFAULT; 1083 if (copy_from_user(range, argp, sizeof(__u64[2]))) 1084 goto out; 1085 1086 ret = -ERANGE; 1087 if (range[1] > bdev_nr_bytes(inode->i_sb->s_bdev)) 1088 goto out; 1089 1090 segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; 1091 1092 minseg = range[0] + segbytes - 1; 1093 minseg = div64_ul(minseg, segbytes); 1094 1095 if (range[1] < 4096) 1096 goto out; 1097 1098 maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); 1099 if (maxseg < segbytes) 1100 goto out; 1101 1102 maxseg = div64_ul(maxseg, segbytes); 1103 maxseg--; 1104 1105 ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); 1106 out: 1107 return ret; 1108 } 1109 1110 /** 1111 * nilfs_ioctl_get_info - wrapping function of get metadata info 1112 * @inode: inode object 1113 * @filp: file object 1114 * @cmd: ioctl's request code 1115 * @argp: pointer on argument from userspace 1116 * @membsz: size of an item in bytes 1117 * @dofunc: concrete function of getting metadata info 1118 * 1119 * Description: nilfs_ioctl_get_info() gets metadata info by means of 1120 * calling dofunc() function. The requested metadata information is copied 1121 * to userspace memory @argp. 1122 * 1123 * Return: 0 on success, or one of the following negative error codes on 1124 * failure: 1125 * * %-EFAULT - Failure during execution of requested operation. 1126 * * %-EINVAL - Invalid arguments from userspace. 1127 * * %-EIO - I/O error. 1128 * * %-ENOMEM - Insufficient memory available. 1129 */ 1130 static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, 1131 unsigned int cmd, void __user *argp, 1132 size_t membsz, 1133 ssize_t (*dofunc)(struct the_nilfs *, 1134 __u64 *, int, 1135 void *, size_t, size_t)) 1136 1137 { 1138 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1139 struct nilfs_argv argv; 1140 int ret; 1141 1142 if (copy_from_user(&argv, argp, sizeof(argv))) 1143 return -EFAULT; 1144 1145 if (argv.v_size < membsz) 1146 return -EINVAL; 1147 1148 ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); 1149 if (ret < 0) 1150 return ret; 1151 1152 if (copy_to_user(argp, &argv, sizeof(argv))) 1153 ret = -EFAULT; 1154 return ret; 1155 } 1156 1157 /** 1158 * nilfs_ioctl_set_suinfo - set segment usage info 1159 * @inode: inode object 1160 * @filp: file object 1161 * @cmd: ioctl's request code 1162 * @argp: pointer on argument from userspace 1163 * 1164 * Description: Expects an array of nilfs_suinfo_update structures 1165 * encapsulated in nilfs_argv and updates the segment usage info 1166 * according to the flags in nilfs_suinfo_update. 1167 * 1168 * Return: 0 on success, or one of the following negative error codes on 1169 * failure: 1170 * * %-EEXIST - Block conflict detected. 1171 * * %-EFAULT - Error copying input data. 1172 * * %-EINVAL - Invalid values in input (segment number, flags or nblocks). 1173 * * %-EIO - I/O error. 1174 * * %-ENOMEM - Insufficient memory available. 1175 * * %-EPERM - Not enough permissions. 1176 */ 1177 static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp, 1178 unsigned int cmd, void __user *argp) 1179 { 1180 struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1181 struct nilfs_transaction_info ti; 1182 struct nilfs_argv argv; 1183 size_t len; 1184 void __user *base; 1185 void *kbuf; 1186 int ret; 1187 1188 if (!capable(CAP_SYS_ADMIN)) 1189 return -EPERM; 1190 1191 ret = mnt_want_write_file(filp); 1192 if (ret) 1193 return ret; 1194 1195 ret = -EFAULT; 1196 if (copy_from_user(&argv, argp, sizeof(argv))) 1197 goto out; 1198 1199 ret = -EINVAL; 1200 if (argv.v_size < sizeof(struct nilfs_suinfo_update)) 1201 goto out; 1202 1203 if (argv.v_nmembs > nilfs->ns_nsegments) 1204 goto out; 1205 1206 if (argv.v_nmembs >= UINT_MAX / argv.v_size) 1207 goto out; 1208 1209 len = argv.v_size * argv.v_nmembs; 1210 if (!len) { 1211 ret = 0; 1212 goto out; 1213 } 1214 1215 base = (void __user *)(unsigned long)argv.v_base; 1216 kbuf = vmalloc(len); 1217 if (!kbuf) { 1218 ret = -ENOMEM; 1219 goto out; 1220 } 1221 1222 if (copy_from_user(kbuf, base, len)) { 1223 ret = -EFAULT; 1224 goto out_free; 1225 } 1226 1227 nilfs_transaction_begin(inode->i_sb, &ti, 0); 1228 ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size, 1229 argv.v_nmembs); 1230 if (unlikely(ret < 0)) 1231 nilfs_transaction_abort(inode->i_sb); 1232 else 1233 nilfs_transaction_commit(inode->i_sb); /* never fails */ 1234 1235 out_free: 1236 vfree(kbuf); 1237 out: 1238 mnt_drop_write_file(filp); 1239 return ret; 1240 } 1241 1242 /** 1243 * nilfs_ioctl_get_fslabel - get the volume name of the file system 1244 * @sb: super block instance 1245 * @argp: pointer to userspace memory where the volume name should be stored 1246 * 1247 * Return: 0 on success, %-EFAULT if copying to userspace memory fails. 1248 */ 1249 static int nilfs_ioctl_get_fslabel(struct super_block *sb, void __user *argp) 1250 { 1251 struct the_nilfs *nilfs = sb->s_fs_info; 1252 char label[NILFS_MAX_VOLUME_NAME + 1]; 1253 1254 BUILD_BUG_ON(NILFS_MAX_VOLUME_NAME >= FSLABEL_MAX); 1255 1256 down_read(&nilfs->ns_sem); 1257 memtostr_pad(label, nilfs->ns_sbp[0]->s_volume_name); 1258 up_read(&nilfs->ns_sem); 1259 1260 if (copy_to_user(argp, label, sizeof(label))) 1261 return -EFAULT; 1262 return 0; 1263 } 1264 1265 /** 1266 * nilfs_ioctl_set_fslabel - set the volume name of the file system 1267 * @sb: super block instance 1268 * @filp: file object 1269 * @argp: pointer to userspace memory that contains the volume name 1270 * 1271 * Return: 0 on success, or one of the following negative error codes on 1272 * failure: 1273 * * %-EFAULT - Error copying input data. 1274 * * %-EINVAL - Label length exceeds record size in superblock. 1275 * * %-EIO - I/O error. 1276 * * %-EPERM - Operation not permitted (insufficient permissions). 1277 * * %-EROFS - Read only file system. 1278 */ 1279 static int nilfs_ioctl_set_fslabel(struct super_block *sb, struct file *filp, 1280 void __user *argp) 1281 { 1282 char label[NILFS_MAX_VOLUME_NAME + 1]; 1283 struct the_nilfs *nilfs = sb->s_fs_info; 1284 struct nilfs_super_block **sbp; 1285 size_t len; 1286 int ret; 1287 1288 if (!capable(CAP_SYS_ADMIN)) 1289 return -EPERM; 1290 1291 ret = mnt_want_write_file(filp); 1292 if (ret) 1293 return ret; 1294 1295 if (copy_from_user(label, argp, NILFS_MAX_VOLUME_NAME + 1)) { 1296 ret = -EFAULT; 1297 goto out_drop_write; 1298 } 1299 1300 len = strnlen(label, NILFS_MAX_VOLUME_NAME + 1); 1301 if (len > NILFS_MAX_VOLUME_NAME) { 1302 nilfs_err(sb, "unable to set label with more than %zu bytes", 1303 NILFS_MAX_VOLUME_NAME); 1304 ret = -EINVAL; 1305 goto out_drop_write; 1306 } 1307 1308 down_write(&nilfs->ns_sem); 1309 sbp = nilfs_prepare_super(sb, false); 1310 if (unlikely(!sbp)) { 1311 ret = -EIO; 1312 goto out_unlock; 1313 } 1314 1315 strtomem_pad(sbp[0]->s_volume_name, label, 0); 1316 if (sbp[1]) 1317 strtomem_pad(sbp[1]->s_volume_name, label, 0); 1318 1319 ret = nilfs_commit_super(sb, NILFS_SB_COMMIT_ALL); 1320 1321 out_unlock: 1322 up_write(&nilfs->ns_sem); 1323 out_drop_write: 1324 mnt_drop_write_file(filp); 1325 return ret; 1326 } 1327 1328 long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1329 { 1330 struct inode *inode = file_inode(filp); 1331 void __user *argp = (void __user *)arg; 1332 1333 switch (cmd) { 1334 case FS_IOC_GETVERSION: 1335 return nilfs_ioctl_getversion(inode, argp); 1336 case NILFS_IOCTL_CHANGE_CPMODE: 1337 return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); 1338 case NILFS_IOCTL_DELETE_CHECKPOINT: 1339 return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); 1340 case NILFS_IOCTL_GET_CPINFO: 1341 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1342 sizeof(struct nilfs_cpinfo), 1343 nilfs_ioctl_do_get_cpinfo); 1344 case NILFS_IOCTL_GET_CPSTAT: 1345 return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); 1346 case NILFS_IOCTL_GET_SUINFO: 1347 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1348 sizeof(struct nilfs_suinfo), 1349 nilfs_ioctl_do_get_suinfo); 1350 case NILFS_IOCTL_SET_SUINFO: 1351 return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp); 1352 case NILFS_IOCTL_GET_SUSTAT: 1353 return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); 1354 case NILFS_IOCTL_GET_VINFO: 1355 return nilfs_ioctl_get_info(inode, filp, cmd, argp, 1356 sizeof(struct nilfs_vinfo), 1357 nilfs_ioctl_do_get_vinfo); 1358 case NILFS_IOCTL_GET_BDESCS: 1359 return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); 1360 case NILFS_IOCTL_CLEAN_SEGMENTS: 1361 return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); 1362 case NILFS_IOCTL_SYNC: 1363 return nilfs_ioctl_sync(inode, filp, cmd, argp); 1364 case NILFS_IOCTL_RESIZE: 1365 return nilfs_ioctl_resize(inode, filp, argp); 1366 case NILFS_IOCTL_SET_ALLOC_RANGE: 1367 return nilfs_ioctl_set_alloc_range(inode, argp); 1368 case FITRIM: 1369 return nilfs_ioctl_trim_fs(inode, argp); 1370 case FS_IOC_GETFSLABEL: 1371 return nilfs_ioctl_get_fslabel(inode->i_sb, argp); 1372 case FS_IOC_SETFSLABEL: 1373 return nilfs_ioctl_set_fslabel(inode->i_sb, filp, argp); 1374 default: 1375 return -ENOTTY; 1376 } 1377 } 1378 1379 #ifdef CONFIG_COMPAT 1380 long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1381 { 1382 switch (cmd) { 1383 case FS_IOC32_GETVERSION: 1384 cmd = FS_IOC_GETVERSION; 1385 break; 1386 case NILFS_IOCTL_CHANGE_CPMODE: 1387 case NILFS_IOCTL_DELETE_CHECKPOINT: 1388 case NILFS_IOCTL_GET_CPINFO: 1389 case NILFS_IOCTL_GET_CPSTAT: 1390 case NILFS_IOCTL_GET_SUINFO: 1391 case NILFS_IOCTL_SET_SUINFO: 1392 case NILFS_IOCTL_GET_SUSTAT: 1393 case NILFS_IOCTL_GET_VINFO: 1394 case NILFS_IOCTL_GET_BDESCS: 1395 case NILFS_IOCTL_CLEAN_SEGMENTS: 1396 case NILFS_IOCTL_SYNC: 1397 case NILFS_IOCTL_RESIZE: 1398 case NILFS_IOCTL_SET_ALLOC_RANGE: 1399 case FITRIM: 1400 case FS_IOC_GETFSLABEL: 1401 case FS_IOC_SETFSLABEL: 1402 break; 1403 default: 1404 return -ENOIOCTLCMD; 1405 } 1406 return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 1407 } 1408 #endif 1409