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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 info30 * @nilfs: nilfs object31 * @argv: vector of arguments from userspace32 * @dir: set of direction flags33 * @dofunc: concrete function of get/set metadata info34 *35 * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of36 * calling dofunc() function on the basis of @argv argument.37 *38 * Return Value: On success, 0 is returned and requested metadata info39 * is copied into userspace. On error, one of the following40 * 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 */48static 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 a69 * total count (argv->v_nmembs) which leads position 'pos' to70 * 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 attributes119 * @dentry: the object to retrieve from120 * @fa: fileattr pointer121 *122 * Return: always 0 as success.123 */124int 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 attributes135 * @idmap: idmap of the mount136 * @dentry: the object to change137 * @fa: fileattr pointer138 *139 * Return: 0 on success, or a negative error code on failure.140 */141int 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 object173 * @argp: userspace memory where the generation number of @inode is stored174 *175 * Return: 0 on success, or %-EFAULT on error.176 */177static 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 object185 * @filp: file object186 * @cmd: ioctl's request code187 * @argp: pointer on argument from userspace188 *189 * Description: nilfs_ioctl_change_cpmode() function changes mode of190 * given checkpoint between checkpoint and snapshot state. This ioctl191 * is used in chcp and mkcp utilities.192 *193 * Return Value: On success, 0 is returned and mode of a checkpoint is194 * changed. On error, one of the following negative error codes195 * is returned.196 *197 * %-EPERM - Operation not permitted.198 *199 * %-EFAULT - Failure during checkpoint mode changing.200 */201static 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 else228 nilfs_transaction_commit(inode->i_sb); /* never fails */229 230 mutex_unlock(&nilfs->ns_snapshot_mount_mutex);231out:232 mnt_drop_write_file(filp);233 return ret;234}235 236/**237 * nilfs_ioctl_delete_checkpoint - remove checkpoint238 * @inode: inode object239 * @filp: file object240 * @cmd: ioctl's request code241 * @argp: pointer on argument from userspace242 *243 * Description: nilfs_ioctl_delete_checkpoint() function removes244 * checkpoint from NILFS2 file system. This ioctl is used in rmcp245 * utility.246 *247 * Return Value: On success, 0 is returned and a checkpoint is248 * removed. On error, one of the following negative error codes249 * is returned.250 *251 * %-EPERM - Operation not permitted.252 *253 * %-EFAULT - Failure during checkpoint removing.254 */255static int256nilfs_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 else280 nilfs_transaction_commit(inode->i_sb); /* never fails */281out:282 mnt_drop_write_file(filp);283 return ret;284}285 286/**287 * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints288 * @nilfs: nilfs object289 * @posp: pointer on array of checkpoint's numbers290 * @flags: checkpoint mode (checkpoint or snapshot)291 * @buf: buffer for storing checkponts' info292 * @size: size in bytes of one checkpoint info item in array293 * @nmembs: number of checkpoints in array (numbers and infos)294 *295 * Description: nilfs_ioctl_do_get_cpinfo() function returns info about296 * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in297 * lscp utility and by nilfs_cleanerd daemon.298 *299 * Return value: count of nilfs_cpinfo structures in output buffer.300 */301static ssize_t302nilfs_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 statistics316 * @inode: inode object317 * @filp: file object318 * @cmd: ioctl's request code319 * @argp: pointer on argument from userspace320 *321 * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints.322 * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities323 * and by nilfs_cleanerd daemon.324 *325 * Return Value: On success, 0 is returned, and checkpoints information is326 * copied into userspace pointer @argp. On error, one of the following327 * 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 */335static 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 info355 * @nilfs: nilfs object356 * @posp: pointer on array of segment numbers357 * @flags: *not used*358 * @buf: buffer for storing suinfo array359 * @size: size in bytes of one suinfo item in array360 * @nmembs: count of segment numbers and suinfos in array361 *362 * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage363 * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used364 * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon.365 *366 * Return value: count of nilfs_suinfo structures in output buffer.367 */368static ssize_t369nilfs_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 statistics383 * @inode: inode object384 * @filp: file object385 * @cmd: ioctl's request code386 * @argp: pointer on argument from userspace387 *388 * Description: nilfs_ioctl_get_sustat() returns segment usage statistics.389 * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities390 * and by nilfs_cleanerd daemon.391 *392 * Return Value: On success, 0 is returned, and segment usage information is393 * copied into userspace pointer @argp. On error, one of the following394 * 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 */402static 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 info422 * @nilfs: nilfs object423 * @posp: *not used*424 * @flags: *not used*425 * @buf: buffer for storing array of nilfs_vinfo structures426 * @size: size in bytes of one vinfo item in array427 * @nmembs: count of vinfos in array428 *429 * Description: nilfs_ioctl_do_get_vinfo() function returns information430 * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used431 * by nilfs_cleanerd daemon.432 *433 * Return value: count of nilfs_vinfo structures in output buffer.434 */435static ssize_t436nilfs_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 descriptors449 * @nilfs: nilfs object450 * @posp: *not used*451 * @flags: *not used*452 * @buf: buffer for storing array of nilfs_bdesc structures453 * @size: size in bytes of one bdesc item in array454 * @nmembs: count of bdescs in array455 *456 * Description: nilfs_ioctl_do_get_bdescs() function returns information457 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl458 * is used by nilfs_cleanerd daemon.459 *460 * Return value: count of nilfs_bdescs structures in output buffer.461 */462static ssize_t463nilfs_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 descriptors490 * @inode: inode object491 * @filp: file object492 * @cmd: ioctl's request code493 * @argp: pointer on argument from userspace494 *495 * Description: nilfs_ioctl_do_get_bdescs() function returns information496 * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl497 * is used by nilfs_cleanerd daemon.498 *499 * Return Value: On success, 0 is returned, and disk block descriptors are500 * copied into userspace pointer @argp. On error, one of the following501 * 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 */511static 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 GC536 * @inode: inode object537 * @vdesc: descriptor of virtual block number538 * @buffers: list of moving buffers539 *540 * Description: nilfs_ioctl_move_inode_block() function registers data/node541 * buffer in the GC pagecache and submit read request.542 *543 * Return Value: On success, 0 is returned. On error, one of the following544 * 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 */554static 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 else566 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 collection599 * @sb: superblock object600 * @argv: vector of arguments from userspace601 * @buf: array of nilfs_vdesc structures602 *603 * Description: nilfs_ioctl_move_blocks() function reads valid data/node604 * blocks that garbage collector specified with the array of nilfs_vdesc605 * structures and stores them into page caches of GC inodes.606 *607 * Return Value: Number of processed nilfs_vdesc structures or608 * error code, otherwise.609 */610static 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 Collection634 * is serialized and no two processes manipulate the635 * 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 checkpoints677 * @nilfs: nilfs object678 * @argv: vector of arguments from userspace679 * @buf: array of periods of checkpoints numbers680 *681 * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints682 * in the period from p_start to p_end, excluding p_end itself. The checkpoints683 * which have been already deleted are ignored.684 *685 * Return Value: Number of processed nilfs_period structures or686 * error code, otherwise.687 *688 * %-EIO - I/O error.689 *690 * %-ENOMEM - Insufficient amount of memory available.691 *692 * %-EINVAL - invalid checkpoints.693 */694static 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 numbers713 * @nilfs: nilfs object714 * @argv: vector of arguments from userspace715 * @buf: array of virtual block numbers716 *717 * Description: nilfs_ioctl_free_vblocknrs() function frees718 * the virtual block numbers specified by @buf and @argv->v_nmembs.719 *720 * Return Value: Number of processed virtual block numbers or721 * 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 */729static 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 dirty742 * @nilfs: nilfs object743 * @argv: vector of arguments from userspace744 * @buf: array of block descriptors745 *746 * Description: nilfs_ioctl_mark_blocks_dirty() function marks747 * metadata file or data blocks as dirty.748 *749 * Return Value: Number of processed block descriptors or750 * error code, otherwise.751 *752 * %-ENOMEM - Insufficient memory available.753 *754 * %-EIO - I/O error755 *756 * %-ENOENT - the specified block does not exist (hole block)757 */758static 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 804int 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 removed814 * 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 atomically823 * 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 segments845 * @inode: inode object846 * @filp: file object847 * @cmd: ioctl's request code848 * @argp: pointer on argument from userspace849 *850 * Description: nilfs_ioctl_clean_segments() function makes garbage851 * collection operation in the environment of requested parameters852 * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by853 * nilfs_cleanerd daemon.854 *855 * Return Value: On success, 0 is returned or error code, otherwise.856 */857static 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. We892 * use kmalloc() for its buffer because the memory used for the893 * 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 958out_free:959 while (--n >= 0)960 vfree(kbufs[n]);961 kfree(kbufs[4]);962out:963 mnt_drop_write_file(filp);964 return ret;965}966 967/**968 * nilfs_ioctl_sync - make a checkpoint969 * @inode: inode object970 * @filp: file object971 * @cmd: ioctl's request code972 * @argp: pointer on argument from userspace973 *974 * Description: nilfs_ioctl_sync() function constructs a logical segment975 * for checkpointing. This function guarantees that all modified data976 * and metadata are written out to the device when it successfully977 * returned.978 *979 * Return Value: On success, 0 is retured. On errors, one of the following980 * negative error code is returned.981 *982 * %-EROFS - Read only filesystem.983 *984 * %-EIO - I/O error985 *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 */994static 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 volume1022 * @inode: inode object1023 * @filp: file object1024 * @argp: pointer on argument from userspace1025 *1026 * Return Value: On success, 0 is returned or error code, otherwise.1027 */1028static 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 1047out_drop_write:1048 mnt_drop_write_file(filp);1049out:1050 return ret;1051}1052 1053/**1054 * nilfs_ioctl_trim_fs() - trim ioctl handle function1055 * @inode: inode object1056 * @argp: pointer on argument from userspace1057 *1058 * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It1059 * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which1060 * performs the actual trim operation.1061 *1062 * Return Value: On success, 0 is returned or negative error code, otherwise.1063 */1064static 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 allocated1097 * @inode: inode object1098 * @argp: pointer on argument from userspace1099 *1100 * Description: nilfs_ioctl_set_alloc_range() function defines lower limit1101 * 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 */1106static 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);1141out:1142 return ret;1143}1144 1145/**1146 * nilfs_ioctl_get_info - wrapping function of get metadata info1147 * @inode: inode object1148 * @filp: file object1149 * @cmd: ioctl's request code1150 * @argp: pointer on argument from userspace1151 * @membsz: size of an item in bytes1152 * @dofunc: concrete function of getting metadata info1153 *1154 * Description: nilfs_ioctl_get_info() gets metadata info by means of1155 * calling dofunc() function.1156 *1157 * Return Value: On success, 0 is returned and requested metadata info1158 * is copied into userspace. On error, one of the following1159 * 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 */1167static 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 info1196 * @inode: inode object1197 * @filp: file object1198 * @cmd: ioctl's request code1199 * @argp: pointer on argument from userspace1200 *1201 * Description: Expects an array of nilfs_suinfo_update structures1202 * encapsulated in nilfs_argv and updates the segment usage info1203 * according to the flags in nilfs_suinfo_update.1204 *1205 * Return Value: On success, 0 is returned. On error, one of the1206 * following negative error codes is returned.1207 *1208 * %-EPERM - Not enough permissions1209 *1210 * %-EFAULT - Error copying input data1211 *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 */1218static 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 else1274 nilfs_transaction_commit(inode->i_sb); /* never fails */1275 1276out_free:1277 vfree(kbuf);1278out:1279 mnt_drop_write_file(filp);1280 return ret;1281}1282 1283/**1284 * nilfs_ioctl_get_fslabel - get the volume name of the file system1285 * @sb: super block instance1286 * @argp: pointer to userspace memory where the volume name should be stored1287 *1288 * Return: 0 on success, %-EFAULT if copying to userspace memory fails.1289 */1290static 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 system1308 * @sb: super block instance1309 * @filp: file object1310 * @argp: pointer to userspace memory that contains the volume name1311 *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 */1319static 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 1361out_unlock:1362 up_write(&nilfs->ns_sem);1363out_drop_write:1364 mnt_drop_write_file(filp);1365 return ret;1366}1367 1368long 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_COMPAT1420long 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#endif1449