17942b919SKoji Sato /* 27942b919SKoji Sato * ioctl.c - NILFS ioctl operations. 37942b919SKoji Sato * 47942b919SKoji Sato * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation. 57942b919SKoji Sato * 67942b919SKoji Sato * This program is free software; you can redistribute it and/or modify 77942b919SKoji Sato * it under the terms of the GNU General Public License as published by 87942b919SKoji Sato * the Free Software Foundation; either version 2 of the License, or 97942b919SKoji Sato * (at your option) any later version. 107942b919SKoji Sato * 117942b919SKoji Sato * This program is distributed in the hope that it will be useful, 127942b919SKoji Sato * but WITHOUT ANY WARRANTY; without even the implied warranty of 137942b919SKoji Sato * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 147942b919SKoji Sato * GNU General Public License for more details. 157942b919SKoji Sato * 167942b919SKoji Sato * You should have received a copy of the GNU General Public License 177942b919SKoji Sato * along with this program; if not, write to the Free Software 187942b919SKoji Sato * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 197942b919SKoji Sato * 207942b919SKoji Sato * Written by Koji Sato <koji@osrg.net>. 217942b919SKoji Sato */ 227942b919SKoji Sato 237942b919SKoji Sato #include <linux/fs.h> 247942b919SKoji Sato #include <linux/wait.h> 255a0e3ad6STejun Heo #include <linux/slab.h> 267942b919SKoji Sato #include <linux/capability.h> /* capable() */ 277942b919SKoji Sato #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ 284f6b8288SRyusuke Konishi #include <linux/vmalloc.h> 29828b1c50SRyusuke Konishi #include <linux/compat.h> /* compat_ptr() */ 302a79f17eSAl Viro #include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */ 31ae191838SRyusuke Konishi #include <linux/buffer_head.h> 327942b919SKoji Sato #include <linux/nilfs2_fs.h> 337942b919SKoji Sato #include "nilfs.h" 347942b919SKoji Sato #include "segment.h" 357942b919SKoji Sato #include "bmap.h" 367942b919SKoji Sato #include "cpfile.h" 377942b919SKoji Sato #include "sufile.h" 387942b919SKoji Sato #include "dat.h" 397942b919SKoji Sato 40d623a942SVyacheslav Dubeyko /** 41d623a942SVyacheslav Dubeyko * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info 42d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 43d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 44d623a942SVyacheslav Dubeyko * @dir: set of direction flags 45d623a942SVyacheslav Dubeyko * @dofunc: concrete function of get/set metadata info 46d623a942SVyacheslav Dubeyko * 47d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of 48d623a942SVyacheslav Dubeyko * calling dofunc() function on the basis of @argv argument. 49d623a942SVyacheslav Dubeyko * 50d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and requested metadata info 51d623a942SVyacheslav Dubeyko * is copied into userspace. On error, one of the following 52d623a942SVyacheslav Dubeyko * negative error codes is returned. 53d623a942SVyacheslav Dubeyko * 54d623a942SVyacheslav Dubeyko * %-EINVAL - Invalid arguments from userspace. 55d623a942SVyacheslav Dubeyko * 56d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 57d623a942SVyacheslav Dubeyko * 58d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during execution of requested operation. 59d623a942SVyacheslav Dubeyko */ 607942b919SKoji Sato static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, 617942b919SKoji Sato struct nilfs_argv *argv, int dir, 627942b919SKoji Sato ssize_t (*dofunc)(struct the_nilfs *, 63b028fcfcSRyusuke Konishi __u64 *, int, 647942b919SKoji Sato void *, size_t, size_t)) 657942b919SKoji Sato { 667942b919SKoji Sato void *buf; 67dc498d09SRyusuke Konishi void __user *base = (void __user *)(unsigned long)argv->v_base; 683358b4aaSRyusuke Konishi size_t maxmembs, total, n; 697942b919SKoji Sato ssize_t nr; 707942b919SKoji Sato int ret, i; 71b028fcfcSRyusuke Konishi __u64 pos, ppos; 727942b919SKoji Sato 737942b919SKoji Sato if (argv->v_nmembs == 0) 747942b919SKoji Sato return 0; 757942b919SKoji Sato 763358b4aaSRyusuke Konishi if (argv->v_size > PAGE_SIZE) 773358b4aaSRyusuke Konishi return -EINVAL; 783358b4aaSRyusuke Konishi 794b15d617SWenliang Fan /* 804b15d617SWenliang Fan * Reject pairs of a start item position (argv->v_index) and a 814b15d617SWenliang Fan * total count (argv->v_nmembs) which leads position 'pos' to 824b15d617SWenliang Fan * overflow by the increment at the end of the loop. 834b15d617SWenliang Fan */ 844b15d617SWenliang Fan if (argv->v_index > ~(__u64)0 - argv->v_nmembs) 854b15d617SWenliang Fan return -EINVAL; 864b15d617SWenliang Fan 873358b4aaSRyusuke Konishi buf = (void *)__get_free_pages(GFP_NOFS, 0); 883358b4aaSRyusuke Konishi if (unlikely(!buf)) 897942b919SKoji Sato return -ENOMEM; 903358b4aaSRyusuke Konishi maxmembs = PAGE_SIZE / argv->v_size; 917942b919SKoji Sato 927942b919SKoji Sato ret = 0; 937942b919SKoji Sato total = 0; 94b028fcfcSRyusuke Konishi pos = argv->v_index; 957942b919SKoji Sato for (i = 0; i < argv->v_nmembs; i += n) { 967942b919SKoji Sato n = (argv->v_nmembs - i < maxmembs) ? 977942b919SKoji Sato argv->v_nmembs - i : maxmembs; 987942b919SKoji Sato if ((dir & _IOC_WRITE) && 99dc498d09SRyusuke Konishi copy_from_user(buf, base + argv->v_size * i, 1007942b919SKoji Sato argv->v_size * n)) { 1017942b919SKoji Sato ret = -EFAULT; 1027942b919SKoji Sato break; 1037942b919SKoji Sato } 104b028fcfcSRyusuke Konishi ppos = pos; 1058acfbf09SPekka Enberg nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, 106b028fcfcSRyusuke Konishi n); 1077942b919SKoji Sato if (nr < 0) { 1087942b919SKoji Sato ret = nr; 1097942b919SKoji Sato break; 1107942b919SKoji Sato } 1117942b919SKoji Sato if ((dir & _IOC_READ) && 112dc498d09SRyusuke Konishi copy_to_user(base + argv->v_size * i, buf, 113dc498d09SRyusuke Konishi argv->v_size * nr)) { 1147942b919SKoji Sato ret = -EFAULT; 1157942b919SKoji Sato break; 1167942b919SKoji Sato } 1177942b919SKoji Sato total += nr; 118b028fcfcSRyusuke Konishi if ((size_t)nr < n) 119b028fcfcSRyusuke Konishi break; 120b028fcfcSRyusuke Konishi if (pos == ppos) 121b028fcfcSRyusuke Konishi pos += n; 1227942b919SKoji Sato } 1237942b919SKoji Sato argv->v_nmembs = total; 1247942b919SKoji Sato 1253358b4aaSRyusuke Konishi free_pages((unsigned long)buf, 0); 1267942b919SKoji Sato return ret; 1277942b919SKoji Sato } 1287942b919SKoji Sato 129d623a942SVyacheslav Dubeyko /** 130d623a942SVyacheslav Dubeyko * nilfs_ioctl_getflags - ioctl to support lsattr 131d623a942SVyacheslav Dubeyko */ 132cde98f0fSRyusuke Konishi static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp) 133cde98f0fSRyusuke Konishi { 134cde98f0fSRyusuke Konishi unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE; 135cde98f0fSRyusuke Konishi 136cde98f0fSRyusuke Konishi return put_user(flags, (int __user *)argp); 137cde98f0fSRyusuke Konishi } 138cde98f0fSRyusuke Konishi 139d623a942SVyacheslav Dubeyko /** 140d623a942SVyacheslav Dubeyko * nilfs_ioctl_setflags - ioctl to support chattr 141d623a942SVyacheslav Dubeyko */ 142cde98f0fSRyusuke Konishi static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp, 143cde98f0fSRyusuke Konishi void __user *argp) 144cde98f0fSRyusuke Konishi { 145cde98f0fSRyusuke Konishi struct nilfs_transaction_info ti; 146cde98f0fSRyusuke Konishi unsigned int flags, oldflags; 147cde98f0fSRyusuke Konishi int ret; 148cde98f0fSRyusuke Konishi 1492e149670SSerge E. Hallyn if (!inode_owner_or_capable(inode)) 150cde98f0fSRyusuke Konishi return -EACCES; 151cde98f0fSRyusuke Konishi 152cde98f0fSRyusuke Konishi if (get_user(flags, (int __user *)argp)) 153cde98f0fSRyusuke Konishi return -EFAULT; 154cde98f0fSRyusuke Konishi 155a561be71SAl Viro ret = mnt_want_write_file(filp); 156cde98f0fSRyusuke Konishi if (ret) 157cde98f0fSRyusuke Konishi return ret; 158cde98f0fSRyusuke Konishi 159cde98f0fSRyusuke Konishi flags = nilfs_mask_flags(inode->i_mode, flags); 160cde98f0fSRyusuke Konishi 161cde98f0fSRyusuke Konishi mutex_lock(&inode->i_mutex); 162cde98f0fSRyusuke Konishi 163cde98f0fSRyusuke Konishi oldflags = NILFS_I(inode)->i_flags; 164cde98f0fSRyusuke Konishi 165cde98f0fSRyusuke Konishi /* 166cde98f0fSRyusuke Konishi * The IMMUTABLE and APPEND_ONLY flags can only be changed by the 167cde98f0fSRyusuke Konishi * relevant capability. 168cde98f0fSRyusuke Konishi */ 169cde98f0fSRyusuke Konishi ret = -EPERM; 170cde98f0fSRyusuke Konishi if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) && 171cde98f0fSRyusuke Konishi !capable(CAP_LINUX_IMMUTABLE)) 172cde98f0fSRyusuke Konishi goto out; 173cde98f0fSRyusuke Konishi 174cde98f0fSRyusuke Konishi ret = nilfs_transaction_begin(inode->i_sb, &ti, 0); 175cde98f0fSRyusuke Konishi if (ret) 176cde98f0fSRyusuke Konishi goto out; 177cde98f0fSRyusuke Konishi 178cde98f0fSRyusuke Konishi NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) | 179cde98f0fSRyusuke Konishi (flags & FS_FL_USER_MODIFIABLE); 180cde98f0fSRyusuke Konishi 181cde98f0fSRyusuke Konishi nilfs_set_inode_flags(inode); 182cde98f0fSRyusuke Konishi inode->i_ctime = CURRENT_TIME; 183cde98f0fSRyusuke Konishi if (IS_SYNC(inode)) 184cde98f0fSRyusuke Konishi nilfs_set_transaction_flag(NILFS_TI_SYNC); 185cde98f0fSRyusuke Konishi 186cde98f0fSRyusuke Konishi nilfs_mark_inode_dirty(inode); 187cde98f0fSRyusuke Konishi ret = nilfs_transaction_commit(inode->i_sb); 188cde98f0fSRyusuke Konishi out: 189cde98f0fSRyusuke Konishi mutex_unlock(&inode->i_mutex); 1902a79f17eSAl Viro mnt_drop_write_file(filp); 191cde98f0fSRyusuke Konishi return ret; 192cde98f0fSRyusuke Konishi } 193cde98f0fSRyusuke Konishi 194d623a942SVyacheslav Dubeyko /** 195d623a942SVyacheslav Dubeyko * nilfs_ioctl_getversion - get info about a file's version (generation number) 196d623a942SVyacheslav Dubeyko */ 197cde98f0fSRyusuke Konishi static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp) 198cde98f0fSRyusuke Konishi { 199cde98f0fSRyusuke Konishi return put_user(inode->i_generation, (int __user *)argp); 200cde98f0fSRyusuke Konishi } 201cde98f0fSRyusuke Konishi 202d623a942SVyacheslav Dubeyko /** 203d623a942SVyacheslav Dubeyko * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot) 204d623a942SVyacheslav Dubeyko * @inode: inode object 205d623a942SVyacheslav Dubeyko * @filp: file object 206d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 207d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 208d623a942SVyacheslav Dubeyko * 209d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_change_cpmode() function changes mode of 210d623a942SVyacheslav Dubeyko * given checkpoint between checkpoint and snapshot state. This ioctl 211d623a942SVyacheslav Dubeyko * is used in chcp and mkcp utilities. 212d623a942SVyacheslav Dubeyko * 213d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and mode of a checkpoint is 214d623a942SVyacheslav Dubeyko * changed. On error, one of the following negative error codes 215d623a942SVyacheslav Dubeyko * is returned. 216d623a942SVyacheslav Dubeyko * 217d623a942SVyacheslav Dubeyko * %-EPERM - Operation not permitted. 218d623a942SVyacheslav Dubeyko * 219d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during checkpoint mode changing. 220d623a942SVyacheslav Dubeyko */ 2217942b919SKoji Sato static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, 2227942b919SKoji Sato unsigned int cmd, void __user *argp) 2237942b919SKoji Sato { 224e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 2257942b919SKoji Sato struct nilfs_transaction_info ti; 2267942b919SKoji Sato struct nilfs_cpmode cpmode; 2277942b919SKoji Sato int ret; 2287942b919SKoji Sato 2297942b919SKoji Sato if (!capable(CAP_SYS_ADMIN)) 2307942b919SKoji Sato return -EPERM; 2317512487eSRyusuke Konishi 232a561be71SAl Viro ret = mnt_want_write_file(filp); 2337512487eSRyusuke Konishi if (ret) 2347512487eSRyusuke Konishi return ret; 2357512487eSRyusuke Konishi 2367512487eSRyusuke Konishi ret = -EFAULT; 2377942b919SKoji Sato if (copy_from_user(&cpmode, argp, sizeof(cpmode))) 2387512487eSRyusuke Konishi goto out; 2397942b919SKoji Sato 240572d8b39SRyusuke Konishi mutex_lock(&nilfs->ns_snapshot_mount_mutex); 2417512487eSRyusuke Konishi 2427942b919SKoji Sato nilfs_transaction_begin(inode->i_sb, &ti, 0); 2437942b919SKoji Sato ret = nilfs_cpfile_change_cpmode( 244e3154e97SRyusuke Konishi nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode); 2457512487eSRyusuke Konishi if (unlikely(ret < 0)) 24647420c79SRyusuke Konishi nilfs_transaction_abort(inode->i_sb); 2477512487eSRyusuke Konishi else 24847420c79SRyusuke Konishi nilfs_transaction_commit(inode->i_sb); /* never fails */ 2497512487eSRyusuke Konishi 250572d8b39SRyusuke Konishi mutex_unlock(&nilfs->ns_snapshot_mount_mutex); 2517512487eSRyusuke Konishi out: 2522a79f17eSAl Viro mnt_drop_write_file(filp); 2537942b919SKoji Sato return ret; 2547942b919SKoji Sato } 2557942b919SKoji Sato 256d623a942SVyacheslav Dubeyko /** 257d623a942SVyacheslav Dubeyko * nilfs_ioctl_delete_checkpoint - remove checkpoint 258d623a942SVyacheslav Dubeyko * @inode: inode object 259d623a942SVyacheslav Dubeyko * @filp: file object 260d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 261d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 262d623a942SVyacheslav Dubeyko * 263d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_delete_checkpoint() function removes 264d623a942SVyacheslav Dubeyko * checkpoint from NILFS2 file system. This ioctl is used in rmcp 265d623a942SVyacheslav Dubeyko * utility. 266d623a942SVyacheslav Dubeyko * 267d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and a checkpoint is 268d623a942SVyacheslav Dubeyko * removed. On error, one of the following negative error codes 269d623a942SVyacheslav Dubeyko * is returned. 270d623a942SVyacheslav Dubeyko * 271d623a942SVyacheslav Dubeyko * %-EPERM - Operation not permitted. 272d623a942SVyacheslav Dubeyko * 273d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during checkpoint removing. 274d623a942SVyacheslav Dubeyko */ 2757942b919SKoji Sato static int 2767942b919SKoji Sato nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, 2777942b919SKoji Sato unsigned int cmd, void __user *argp) 2787942b919SKoji Sato { 279e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 2807942b919SKoji Sato struct nilfs_transaction_info ti; 2817942b919SKoji Sato __u64 cno; 2827942b919SKoji Sato int ret; 2837942b919SKoji Sato 2847942b919SKoji Sato if (!capable(CAP_SYS_ADMIN)) 2857942b919SKoji Sato return -EPERM; 2867512487eSRyusuke Konishi 287a561be71SAl Viro ret = mnt_want_write_file(filp); 2887512487eSRyusuke Konishi if (ret) 2897512487eSRyusuke Konishi return ret; 2907512487eSRyusuke Konishi 2917512487eSRyusuke Konishi ret = -EFAULT; 2927942b919SKoji Sato if (copy_from_user(&cno, argp, sizeof(cno))) 2937512487eSRyusuke Konishi goto out; 2947942b919SKoji Sato 2957942b919SKoji Sato nilfs_transaction_begin(inode->i_sb, &ti, 0); 296e3154e97SRyusuke Konishi ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno); 2977512487eSRyusuke Konishi if (unlikely(ret < 0)) 29847420c79SRyusuke Konishi nilfs_transaction_abort(inode->i_sb); 2997512487eSRyusuke Konishi else 30047420c79SRyusuke Konishi nilfs_transaction_commit(inode->i_sb); /* never fails */ 3017512487eSRyusuke Konishi out: 3022a79f17eSAl Viro mnt_drop_write_file(filp); 3037942b919SKoji Sato return ret; 3047942b919SKoji Sato } 3057942b919SKoji Sato 306d623a942SVyacheslav Dubeyko /** 307d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints 308d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 309d623a942SVyacheslav Dubeyko * @posp: pointer on array of checkpoint's numbers 310d623a942SVyacheslav Dubeyko * @flags: checkpoint mode (checkpoint or snapshot) 311d623a942SVyacheslav Dubeyko * @buf: buffer for storing checkponts' info 312d623a942SVyacheslav Dubeyko * @size: size in bytes of one checkpoint info item in array 313d623a942SVyacheslav Dubeyko * @nmembs: number of checkpoints in array (numbers and infos) 314d623a942SVyacheslav Dubeyko * 315d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_cpinfo() function returns info about 316d623a942SVyacheslav Dubeyko * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in 317d623a942SVyacheslav Dubeyko * lscp utility and by nilfs_cleanerd daemon. 318d623a942SVyacheslav Dubeyko * 319d623a942SVyacheslav Dubeyko * Return value: count of nilfs_cpinfo structures in output buffer. 320d623a942SVyacheslav Dubeyko */ 3217942b919SKoji Sato static ssize_t 322b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 3237942b919SKoji Sato void *buf, size_t size, size_t nmembs) 3247942b919SKoji Sato { 3257942b919SKoji Sato int ret; 3267942b919SKoji Sato 32747420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 32847eb6b9cSRyusuke Konishi ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, 329003ff182SRyusuke Konishi size, nmembs); 33047420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 3317942b919SKoji Sato return ret; 3327942b919SKoji Sato } 3337942b919SKoji Sato 334d623a942SVyacheslav Dubeyko /** 335d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_cpstat - get checkpoints statistics 336d623a942SVyacheslav Dubeyko * @inode: inode object 337d623a942SVyacheslav Dubeyko * @filp: file object 338d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 339d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 340d623a942SVyacheslav Dubeyko * 341d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints. 342d623a942SVyacheslav Dubeyko * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities 343d623a942SVyacheslav Dubeyko * and by nilfs_cleanerd daemon. 344d623a942SVyacheslav Dubeyko * 345d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned, and checkpoints information is 346d623a942SVyacheslav Dubeyko * copied into userspace pointer @argp. On error, one of the following 347d623a942SVyacheslav Dubeyko * negative error codes is returned. 348d623a942SVyacheslav Dubeyko * 349d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 350d623a942SVyacheslav Dubeyko * 351d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 352d623a942SVyacheslav Dubeyko * 353d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during getting checkpoints statistics. 354d623a942SVyacheslav Dubeyko */ 3557942b919SKoji Sato static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, 3567942b919SKoji Sato unsigned int cmd, void __user *argp) 3577942b919SKoji Sato { 358e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 3597942b919SKoji Sato struct nilfs_cpstat cpstat; 3607942b919SKoji Sato int ret; 3617942b919SKoji Sato 36247420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 36347420c79SRyusuke Konishi ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); 36447420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 3657942b919SKoji Sato if (ret < 0) 3667942b919SKoji Sato return ret; 3677942b919SKoji Sato 3687942b919SKoji Sato if (copy_to_user(argp, &cpstat, sizeof(cpstat))) 3697942b919SKoji Sato ret = -EFAULT; 3707942b919SKoji Sato return ret; 3717942b919SKoji Sato } 3727942b919SKoji Sato 373d623a942SVyacheslav Dubeyko /** 374d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info 375d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 376d623a942SVyacheslav Dubeyko * @posp: pointer on array of segment numbers 377d623a942SVyacheslav Dubeyko * @flags: *not used* 378d623a942SVyacheslav Dubeyko * @buf: buffer for storing suinfo array 379d623a942SVyacheslav Dubeyko * @size: size in bytes of one suinfo item in array 380d623a942SVyacheslav Dubeyko * @nmembs: count of segment numbers and suinfos in array 381d623a942SVyacheslav Dubeyko * 382d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage 383d623a942SVyacheslav Dubeyko * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used 384d623a942SVyacheslav Dubeyko * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon. 385d623a942SVyacheslav Dubeyko * 386d623a942SVyacheslav Dubeyko * Return value: count of nilfs_suinfo structures in output buffer. 387d623a942SVyacheslav Dubeyko */ 3887942b919SKoji Sato static ssize_t 389b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 3907942b919SKoji Sato void *buf, size_t size, size_t nmembs) 3917942b919SKoji Sato { 3927942b919SKoji Sato int ret; 3937942b919SKoji Sato 39447420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 395003ff182SRyusuke Konishi ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, 396003ff182SRyusuke Konishi nmembs); 39747420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 3987942b919SKoji Sato return ret; 3997942b919SKoji Sato } 4007942b919SKoji Sato 401d623a942SVyacheslav Dubeyko /** 402d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_sustat - get segment usage statistics 403d623a942SVyacheslav Dubeyko * @inode: inode object 404d623a942SVyacheslav Dubeyko * @filp: file object 405d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 406d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 407d623a942SVyacheslav Dubeyko * 408d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_get_sustat() returns segment usage statistics. 409d623a942SVyacheslav Dubeyko * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities 410d623a942SVyacheslav Dubeyko * and by nilfs_cleanerd daemon. 411d623a942SVyacheslav Dubeyko * 412d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned, and segment usage information is 413d623a942SVyacheslav Dubeyko * copied into userspace pointer @argp. On error, one of the following 414d623a942SVyacheslav Dubeyko * negative error codes is returned. 415d623a942SVyacheslav Dubeyko * 416d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 417d623a942SVyacheslav Dubeyko * 418d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 419d623a942SVyacheslav Dubeyko * 420d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during getting segment usage statistics. 421d623a942SVyacheslav Dubeyko */ 4227942b919SKoji Sato static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, 4237942b919SKoji Sato unsigned int cmd, void __user *argp) 4247942b919SKoji Sato { 425e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 4267942b919SKoji Sato struct nilfs_sustat sustat; 4277942b919SKoji Sato int ret; 4287942b919SKoji Sato 42947420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 43047420c79SRyusuke Konishi ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); 43147420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 4327942b919SKoji Sato if (ret < 0) 4337942b919SKoji Sato return ret; 4347942b919SKoji Sato 4357942b919SKoji Sato if (copy_to_user(argp, &sustat, sizeof(sustat))) 4367942b919SKoji Sato ret = -EFAULT; 4377942b919SKoji Sato return ret; 4387942b919SKoji Sato } 4397942b919SKoji Sato 440d623a942SVyacheslav Dubeyko /** 441d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info 442d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 443d623a942SVyacheslav Dubeyko * @posp: *not used* 444d623a942SVyacheslav Dubeyko * @flags: *not used* 445d623a942SVyacheslav Dubeyko * @buf: buffer for storing array of nilfs_vinfo structures 446d623a942SVyacheslav Dubeyko * @size: size in bytes of one vinfo item in array 447d623a942SVyacheslav Dubeyko * @nmembs: count of vinfos in array 448d623a942SVyacheslav Dubeyko * 449d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_vinfo() function returns information 450d623a942SVyacheslav Dubeyko * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used 451d623a942SVyacheslav Dubeyko * by nilfs_cleanerd daemon. 452d623a942SVyacheslav Dubeyko * 453d623a942SVyacheslav Dubeyko * Return value: count of nilfs_vinfo structures in output buffer. 454d623a942SVyacheslav Dubeyko */ 4557942b919SKoji Sato static ssize_t 456b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 4577942b919SKoji Sato void *buf, size_t size, size_t nmembs) 4587942b919SKoji Sato { 4597942b919SKoji Sato int ret; 4607942b919SKoji Sato 46147420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 462365e215cSRyusuke Konishi ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); 46347420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 4647942b919SKoji Sato return ret; 4657942b919SKoji Sato } 4667942b919SKoji Sato 467d623a942SVyacheslav Dubeyko /** 468d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors 469d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 470d623a942SVyacheslav Dubeyko * @posp: *not used* 471d623a942SVyacheslav Dubeyko * @flags: *not used* 472d623a942SVyacheslav Dubeyko * @buf: buffer for storing array of nilfs_bdesc structures 473d623a942SVyacheslav Dubeyko * @size: size in bytes of one bdesc item in array 474d623a942SVyacheslav Dubeyko * @nmembs: count of bdescs in array 475d623a942SVyacheslav Dubeyko * 476d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_bdescs() function returns information 477d623a942SVyacheslav Dubeyko * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 478d623a942SVyacheslav Dubeyko * is used by nilfs_cleanerd daemon. 479d623a942SVyacheslav Dubeyko * 480d623a942SVyacheslav Dubeyko * Return value: count of nilfs_bdescs structures in output buffer. 481d623a942SVyacheslav Dubeyko */ 4827942b919SKoji Sato static ssize_t 483b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, 4847942b919SKoji Sato void *buf, size_t size, size_t nmembs) 4857942b919SKoji Sato { 486365e215cSRyusuke Konishi struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 4877942b919SKoji Sato struct nilfs_bdesc *bdescs = buf; 4887942b919SKoji Sato int ret, i; 4897942b919SKoji Sato 49047eb6b9cSRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 4917942b919SKoji Sato for (i = 0; i < nmembs; i++) { 4927942b919SKoji Sato ret = nilfs_bmap_lookup_at_level(bmap, 4937942b919SKoji Sato bdescs[i].bd_offset, 4947942b919SKoji Sato bdescs[i].bd_level + 1, 4957942b919SKoji Sato &bdescs[i].bd_blocknr); 4967942b919SKoji Sato if (ret < 0) { 49747eb6b9cSRyusuke Konishi if (ret != -ENOENT) { 49847eb6b9cSRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 4997942b919SKoji Sato return ret; 50047eb6b9cSRyusuke Konishi } 5017942b919SKoji Sato bdescs[i].bd_blocknr = 0; 5027942b919SKoji Sato } 5037942b919SKoji Sato } 50447eb6b9cSRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 5057942b919SKoji Sato return nmembs; 5067942b919SKoji Sato } 5077942b919SKoji Sato 508d623a942SVyacheslav Dubeyko /** 509d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_bdescs - get disk block descriptors 510d623a942SVyacheslav Dubeyko * @inode: inode object 511d623a942SVyacheslav Dubeyko * @filp: file object 512d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 513d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 514d623a942SVyacheslav Dubeyko * 515d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_bdescs() function returns information 516d623a942SVyacheslav Dubeyko * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 517d623a942SVyacheslav Dubeyko * is used by nilfs_cleanerd daemon. 518d623a942SVyacheslav Dubeyko * 519d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned, and disk block descriptors are 520d623a942SVyacheslav Dubeyko * copied into userspace pointer @argp. On error, one of the following 521d623a942SVyacheslav Dubeyko * negative error codes is returned. 522d623a942SVyacheslav Dubeyko * 523d623a942SVyacheslav Dubeyko * %-EINVAL - Invalid arguments from userspace. 524d623a942SVyacheslav Dubeyko * 525d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 526d623a942SVyacheslav Dubeyko * 527d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 528d623a942SVyacheslav Dubeyko * 529d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during getting disk block descriptors. 530d623a942SVyacheslav Dubeyko */ 5317942b919SKoji Sato static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, 5327942b919SKoji Sato unsigned int cmd, void __user *argp) 5337942b919SKoji Sato { 534e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 5357942b919SKoji Sato struct nilfs_argv argv; 5367942b919SKoji Sato int ret; 5377942b919SKoji Sato 5387942b919SKoji Sato if (copy_from_user(&argv, argp, sizeof(argv))) 5397942b919SKoji Sato return -EFAULT; 5407942b919SKoji Sato 54183aca8f4SRyusuke Konishi if (argv.v_size != sizeof(struct nilfs_bdesc)) 54283aca8f4SRyusuke Konishi return -EINVAL; 54383aca8f4SRyusuke Konishi 5447942b919SKoji Sato ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), 5457942b919SKoji Sato nilfs_ioctl_do_get_bdescs); 54647420c79SRyusuke Konishi if (ret < 0) 54747420c79SRyusuke Konishi return ret; 5487942b919SKoji Sato 5497942b919SKoji Sato if (copy_to_user(argp, &argv, sizeof(argv))) 5507942b919SKoji Sato ret = -EFAULT; 5517942b919SKoji Sato return ret; 5527942b919SKoji Sato } 5537942b919SKoji Sato 554d623a942SVyacheslav Dubeyko /** 555d623a942SVyacheslav Dubeyko * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC 556d623a942SVyacheslav Dubeyko * @inode: inode object 557d623a942SVyacheslav Dubeyko * @vdesc: descriptor of virtual block number 558d623a942SVyacheslav Dubeyko * @buffers: list of moving buffers 559d623a942SVyacheslav Dubeyko * 560d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_move_inode_block() function registers data/node 561d623a942SVyacheslav Dubeyko * buffer in the GC pagecache and submit read request. 562d623a942SVyacheslav Dubeyko * 563d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned. On error, one of the following 564d623a942SVyacheslav Dubeyko * negative error codes is returned. 565d623a942SVyacheslav Dubeyko * 566d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 567d623a942SVyacheslav Dubeyko * 568d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 569d623a942SVyacheslav Dubeyko * 570d623a942SVyacheslav Dubeyko * %-ENOENT - Requested block doesn't exist. 571d623a942SVyacheslav Dubeyko * 572d623a942SVyacheslav Dubeyko * %-EEXIST - Blocks conflict is detected. 573d623a942SVyacheslav Dubeyko */ 5747942b919SKoji Sato static int nilfs_ioctl_move_inode_block(struct inode *inode, 5757942b919SKoji Sato struct nilfs_vdesc *vdesc, 5767942b919SKoji Sato struct list_head *buffers) 5777942b919SKoji Sato { 5787942b919SKoji Sato struct buffer_head *bh; 5797942b919SKoji Sato int ret; 5807942b919SKoji Sato 5817942b919SKoji Sato if (vdesc->vd_flags == 0) 5827942b919SKoji Sato ret = nilfs_gccache_submit_read_data( 5837942b919SKoji Sato inode, vdesc->vd_offset, vdesc->vd_blocknr, 5847942b919SKoji Sato vdesc->vd_vblocknr, &bh); 5857942b919SKoji Sato else 5867942b919SKoji Sato ret = nilfs_gccache_submit_read_node( 5877942b919SKoji Sato inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); 5887942b919SKoji Sato 5897942b919SKoji Sato if (unlikely(ret < 0)) { 5907942b919SKoji Sato if (ret == -ENOENT) 5917942b919SKoji Sato printk(KERN_CRIT 5927942b919SKoji Sato "%s: invalid virtual block address (%s): " 5937942b919SKoji Sato "ino=%llu, cno=%llu, offset=%llu, " 5947942b919SKoji Sato "blocknr=%llu, vblocknr=%llu\n", 5957942b919SKoji Sato __func__, vdesc->vd_flags ? "node" : "data", 5967942b919SKoji Sato (unsigned long long)vdesc->vd_ino, 5977942b919SKoji Sato (unsigned long long)vdesc->vd_cno, 5987942b919SKoji Sato (unsigned long long)vdesc->vd_offset, 5997942b919SKoji Sato (unsigned long long)vdesc->vd_blocknr, 6007942b919SKoji Sato (unsigned long long)vdesc->vd_vblocknr); 6017942b919SKoji Sato return ret; 6027942b919SKoji Sato } 6035399dd1fSRyusuke Konishi if (unlikely(!list_empty(&bh->b_assoc_buffers))) { 6045399dd1fSRyusuke Konishi printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, " 6055399dd1fSRyusuke Konishi "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n", 6065399dd1fSRyusuke Konishi __func__, vdesc->vd_flags ? "node" : "data", 6075399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_ino, 6085399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_cno, 6095399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_offset, 6105399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_blocknr, 6115399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_vblocknr); 6125399dd1fSRyusuke Konishi brelse(bh); 6135399dd1fSRyusuke Konishi return -EEXIST; 6145399dd1fSRyusuke Konishi } 6157942b919SKoji Sato list_add_tail(&bh->b_assoc_buffers, buffers); 6167942b919SKoji Sato return 0; 6177942b919SKoji Sato } 6187942b919SKoji Sato 619d623a942SVyacheslav Dubeyko /** 620d623a942SVyacheslav Dubeyko * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection 621d623a942SVyacheslav Dubeyko * @sb: superblock object 622d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 623d623a942SVyacheslav Dubeyko * @buf: array of nilfs_vdesc structures 624d623a942SVyacheslav Dubeyko * 625d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_move_blocks() function reads valid data/node 626d623a942SVyacheslav Dubeyko * blocks that garbage collector specified with the array of nilfs_vdesc 627d623a942SVyacheslav Dubeyko * structures and stores them into page caches of GC inodes. 628d623a942SVyacheslav Dubeyko * 629d623a942SVyacheslav Dubeyko * Return Value: Number of processed nilfs_vdesc structures or 630d623a942SVyacheslav Dubeyko * error code, otherwise. 631d623a942SVyacheslav Dubeyko */ 632263d90ceSRyusuke Konishi static int nilfs_ioctl_move_blocks(struct super_block *sb, 6334f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 6347942b919SKoji Sato { 6354f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 636e3154e97SRyusuke Konishi struct the_nilfs *nilfs = sb->s_fs_info; 6377942b919SKoji Sato struct inode *inode; 6387942b919SKoji Sato struct nilfs_vdesc *vdesc; 6397942b919SKoji Sato struct buffer_head *bh, *n; 6407942b919SKoji Sato LIST_HEAD(buffers); 6417942b919SKoji Sato ino_t ino; 6427942b919SKoji Sato __u64 cno; 6437942b919SKoji Sato int i, ret; 6447942b919SKoji Sato 6457942b919SKoji Sato for (i = 0, vdesc = buf; i < nmembs; ) { 6467942b919SKoji Sato ino = vdesc->vd_ino; 6477942b919SKoji Sato cno = vdesc->vd_cno; 648263d90ceSRyusuke Konishi inode = nilfs_iget_for_gc(sb, ino, cno); 649103cfcf5SDan Carpenter if (IS_ERR(inode)) { 650103cfcf5SDan Carpenter ret = PTR_ERR(inode); 6517942b919SKoji Sato goto failed; 6527942b919SKoji Sato } 653947b10aeSRyusuke Konishi if (list_empty(&NILFS_I(inode)->i_dirty)) { 654947b10aeSRyusuke Konishi /* 655947b10aeSRyusuke Konishi * Add the inode to GC inode list. Garbage Collection 656947b10aeSRyusuke Konishi * is serialized and no two processes manipulate the 657947b10aeSRyusuke Konishi * list simultaneously. 658947b10aeSRyusuke Konishi */ 659947b10aeSRyusuke Konishi igrab(inode); 660947b10aeSRyusuke Konishi list_add(&NILFS_I(inode)->i_dirty, 661947b10aeSRyusuke Konishi &nilfs->ns_gc_inodes); 662947b10aeSRyusuke Konishi } 663947b10aeSRyusuke Konishi 6647942b919SKoji Sato do { 6657942b919SKoji Sato ret = nilfs_ioctl_move_inode_block(inode, vdesc, 6667942b919SKoji Sato &buffers); 667263d90ceSRyusuke Konishi if (unlikely(ret < 0)) { 668263d90ceSRyusuke Konishi iput(inode); 6697942b919SKoji Sato goto failed; 670263d90ceSRyusuke Konishi } 6717942b919SKoji Sato vdesc++; 6727942b919SKoji Sato } while (++i < nmembs && 6737942b919SKoji Sato vdesc->vd_ino == ino && vdesc->vd_cno == cno); 674263d90ceSRyusuke Konishi 675263d90ceSRyusuke Konishi iput(inode); /* The inode still remains in GC inode list */ 6767942b919SKoji Sato } 6777942b919SKoji Sato 6787942b919SKoji Sato list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 6797942b919SKoji Sato ret = nilfs_gccache_wait_and_mark_dirty(bh); 6807942b919SKoji Sato if (unlikely(ret < 0)) { 6815399dd1fSRyusuke Konishi WARN_ON(ret == -EEXIST); 6827942b919SKoji Sato goto failed; 6837942b919SKoji Sato } 6847942b919SKoji Sato list_del_init(&bh->b_assoc_buffers); 6857942b919SKoji Sato brelse(bh); 6867942b919SKoji Sato } 6877942b919SKoji Sato return nmembs; 6887942b919SKoji Sato 6897942b919SKoji Sato failed: 6907942b919SKoji Sato list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 6917942b919SKoji Sato list_del_init(&bh->b_assoc_buffers); 6927942b919SKoji Sato brelse(bh); 6937942b919SKoji Sato } 6947942b919SKoji Sato return ret; 6957942b919SKoji Sato } 6967942b919SKoji Sato 697d623a942SVyacheslav Dubeyko /** 698d623a942SVyacheslav Dubeyko * nilfs_ioctl_delete_checkpoints - delete checkpoints 699d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 700d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 701d623a942SVyacheslav Dubeyko * @buf: array of periods of checkpoints numbers 702d623a942SVyacheslav Dubeyko * 703d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints 704d623a942SVyacheslav Dubeyko * in the period from p_start to p_end, excluding p_end itself. The checkpoints 705d623a942SVyacheslav Dubeyko * which have been already deleted are ignored. 706d623a942SVyacheslav Dubeyko * 707d623a942SVyacheslav Dubeyko * Return Value: Number of processed nilfs_period structures or 708d623a942SVyacheslav Dubeyko * error code, otherwise. 709d623a942SVyacheslav Dubeyko * 710d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 711d623a942SVyacheslav Dubeyko * 712d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 713d623a942SVyacheslav Dubeyko * 714d623a942SVyacheslav Dubeyko * %-EINVAL - invalid checkpoints. 715d623a942SVyacheslav Dubeyko */ 7164f6b8288SRyusuke Konishi static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, 7174f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 7187942b919SKoji Sato { 7194f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 7207942b919SKoji Sato struct inode *cpfile = nilfs->ns_cpfile; 7217942b919SKoji Sato struct nilfs_period *periods = buf; 7227942b919SKoji Sato int ret, i; 7237942b919SKoji Sato 7247942b919SKoji Sato for (i = 0; i < nmembs; i++) { 7257942b919SKoji Sato ret = nilfs_cpfile_delete_checkpoints( 7267942b919SKoji Sato cpfile, periods[i].p_start, periods[i].p_end); 7277942b919SKoji Sato if (ret < 0) 7287942b919SKoji Sato return ret; 7297942b919SKoji Sato } 7307942b919SKoji Sato return nmembs; 7317942b919SKoji Sato } 7327942b919SKoji Sato 733d623a942SVyacheslav Dubeyko /** 734d623a942SVyacheslav Dubeyko * nilfs_ioctl_free_vblocknrs - free virtual block numbers 735d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 736d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 737d623a942SVyacheslav Dubeyko * @buf: array of virtual block numbers 738d623a942SVyacheslav Dubeyko * 739d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_free_vblocknrs() function frees 740d623a942SVyacheslav Dubeyko * the virtual block numbers specified by @buf and @argv->v_nmembs. 741d623a942SVyacheslav Dubeyko * 742d623a942SVyacheslav Dubeyko * Return Value: Number of processed virtual block numbers or 743d623a942SVyacheslav Dubeyko * error code, otherwise. 744d623a942SVyacheslav Dubeyko * 745d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 746d623a942SVyacheslav Dubeyko * 747d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 748d623a942SVyacheslav Dubeyko * 749d623a942SVyacheslav Dubeyko * %-ENOENT - The virtual block number have not been allocated. 750d623a942SVyacheslav Dubeyko */ 7514f6b8288SRyusuke Konishi static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, 7524f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 7537942b919SKoji Sato { 7544f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 7554f6b8288SRyusuke Konishi int ret; 7567942b919SKoji Sato 757365e215cSRyusuke Konishi ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); 7587942b919SKoji Sato 7597942b919SKoji Sato return (ret < 0) ? ret : nmembs; 7607942b919SKoji Sato } 7617942b919SKoji Sato 762d623a942SVyacheslav Dubeyko /** 763d623a942SVyacheslav Dubeyko * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty 764d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 765d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 766d623a942SVyacheslav Dubeyko * @buf: array of block descriptors 767d623a942SVyacheslav Dubeyko * 768d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_mark_blocks_dirty() function marks 769d623a942SVyacheslav Dubeyko * metadata file or data blocks as dirty. 770d623a942SVyacheslav Dubeyko * 771d623a942SVyacheslav Dubeyko * Return Value: Number of processed block descriptors or 772d623a942SVyacheslav Dubeyko * error code, otherwise. 773d623a942SVyacheslav Dubeyko * 774d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient memory available. 775d623a942SVyacheslav Dubeyko * 776d623a942SVyacheslav Dubeyko * %-EIO - I/O error 777d623a942SVyacheslav Dubeyko * 778d623a942SVyacheslav Dubeyko * %-ENOENT - the specified block does not exist (hole block) 779d623a942SVyacheslav Dubeyko */ 7804f6b8288SRyusuke Konishi static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, 7814f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 7827942b919SKoji Sato { 7834f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 784365e215cSRyusuke Konishi struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 7857942b919SKoji Sato struct nilfs_bdesc *bdescs = buf; 7867942b919SKoji Sato int ret, i; 7877942b919SKoji Sato 7887942b919SKoji Sato for (i = 0; i < nmembs; i++) { 7897942b919SKoji Sato /* XXX: use macro or inline func to check liveness */ 7907942b919SKoji Sato ret = nilfs_bmap_lookup_at_level(bmap, 7917942b919SKoji Sato bdescs[i].bd_offset, 7927942b919SKoji Sato bdescs[i].bd_level + 1, 7937942b919SKoji Sato &bdescs[i].bd_blocknr); 7947942b919SKoji Sato if (ret < 0) { 7957942b919SKoji Sato if (ret != -ENOENT) 7967942b919SKoji Sato return ret; 7977942b919SKoji Sato bdescs[i].bd_blocknr = 0; 7987942b919SKoji Sato } 7997942b919SKoji Sato if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) 8007942b919SKoji Sato /* skip dead block */ 8017942b919SKoji Sato continue; 8027942b919SKoji Sato if (bdescs[i].bd_level == 0) { 803365e215cSRyusuke Konishi ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat, 8047942b919SKoji Sato bdescs[i].bd_offset); 8057942b919SKoji Sato if (ret < 0) { 8061f5abe7eSRyusuke Konishi WARN_ON(ret == -ENOENT); 8077942b919SKoji Sato return ret; 8087942b919SKoji Sato } 8097942b919SKoji Sato } else { 8107942b919SKoji Sato ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, 8117942b919SKoji Sato bdescs[i].bd_level); 8127942b919SKoji Sato if (ret < 0) { 8131f5abe7eSRyusuke Konishi WARN_ON(ret == -ENOENT); 8147942b919SKoji Sato return ret; 8157942b919SKoji Sato } 8167942b919SKoji Sato } 8177942b919SKoji Sato } 8187942b919SKoji Sato return nmembs; 8197942b919SKoji Sato } 8207942b919SKoji Sato 8217942b919SKoji Sato int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, 8224f6b8288SRyusuke Konishi struct nilfs_argv *argv, void **kbufs) 8237942b919SKoji Sato { 8241f5abe7eSRyusuke Konishi const char *msg; 8254f6b8288SRyusuke Konishi int ret; 8267942b919SKoji Sato 8274f6b8288SRyusuke Konishi ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); 8281f5abe7eSRyusuke Konishi if (ret < 0) { 8291f5abe7eSRyusuke Konishi /* 8301f5abe7eSRyusuke Konishi * can safely abort because checkpoints can be removed 8311f5abe7eSRyusuke Konishi * independently. 8321f5abe7eSRyusuke Konishi */ 8331f5abe7eSRyusuke Konishi msg = "cannot delete checkpoints"; 8341f5abe7eSRyusuke Konishi goto failed; 8351f5abe7eSRyusuke Konishi } 8364f6b8288SRyusuke Konishi ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); 8371f5abe7eSRyusuke Konishi if (ret < 0) { 8381f5abe7eSRyusuke Konishi /* 8391f5abe7eSRyusuke Konishi * can safely abort because DAT file is updated atomically 8401f5abe7eSRyusuke Konishi * using a copy-on-write technique. 8411f5abe7eSRyusuke Konishi */ 8421f5abe7eSRyusuke Konishi msg = "cannot delete virtual blocks from DAT file"; 8431f5abe7eSRyusuke Konishi goto failed; 8441f5abe7eSRyusuke Konishi } 8454f6b8288SRyusuke Konishi ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); 8461f5abe7eSRyusuke Konishi if (ret < 0) { 8471f5abe7eSRyusuke Konishi /* 8481f5abe7eSRyusuke Konishi * can safely abort because the operation is nondestructive. 8491f5abe7eSRyusuke Konishi */ 8501f5abe7eSRyusuke Konishi msg = "cannot mark copying blocks dirty"; 8511f5abe7eSRyusuke Konishi goto failed; 8521f5abe7eSRyusuke Konishi } 8537942b919SKoji Sato return 0; 8547942b919SKoji Sato 8551f5abe7eSRyusuke Konishi failed: 8561f5abe7eSRyusuke Konishi printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n", 8571f5abe7eSRyusuke Konishi msg, ret); 8587942b919SKoji Sato return ret; 8597942b919SKoji Sato } 8607942b919SKoji Sato 861d623a942SVyacheslav Dubeyko /** 862d623a942SVyacheslav Dubeyko * nilfs_ioctl_clean_segments - clean segments 863d623a942SVyacheslav Dubeyko * @inode: inode object 864d623a942SVyacheslav Dubeyko * @filp: file object 865d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 866d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 867d623a942SVyacheslav Dubeyko * 868d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_clean_segments() function makes garbage 869d623a942SVyacheslav Dubeyko * collection operation in the environment of requested parameters 870d623a942SVyacheslav Dubeyko * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by 871d623a942SVyacheslav Dubeyko * nilfs_cleanerd daemon. 872d623a942SVyacheslav Dubeyko * 873d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned or error code, otherwise. 874d623a942SVyacheslav Dubeyko */ 8757942b919SKoji Sato static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, 8767942b919SKoji Sato unsigned int cmd, void __user *argp) 8777942b919SKoji Sato { 8784f6b8288SRyusuke Konishi struct nilfs_argv argv[5]; 87933e189bdSTobias Klauser static const size_t argsz[5] = { 8804f6b8288SRyusuke Konishi sizeof(struct nilfs_vdesc), 8814f6b8288SRyusuke Konishi sizeof(struct nilfs_period), 8824f6b8288SRyusuke Konishi sizeof(__u64), 8834f6b8288SRyusuke Konishi sizeof(struct nilfs_bdesc), 8844f6b8288SRyusuke Konishi sizeof(__u64), 8854f6b8288SRyusuke Konishi }; 8864f6b8288SRyusuke Konishi void __user *base; 8874f6b8288SRyusuke Konishi void *kbufs[5]; 8884f6b8288SRyusuke Konishi struct the_nilfs *nilfs; 8894f6b8288SRyusuke Konishi size_t len, nsegs; 8904f6b8288SRyusuke Konishi int n, ret; 8914f6b8288SRyusuke Konishi 8927942b919SKoji Sato if (!capable(CAP_SYS_ADMIN)) 8937942b919SKoji Sato return -EPERM; 8944f6b8288SRyusuke Konishi 895a561be71SAl Viro ret = mnt_want_write_file(filp); 8967512487eSRyusuke Konishi if (ret) 8977512487eSRyusuke Konishi return ret; 8984f6b8288SRyusuke Konishi 8997512487eSRyusuke Konishi ret = -EFAULT; 9007512487eSRyusuke Konishi if (copy_from_user(argv, argp, sizeof(argv))) 9017512487eSRyusuke Konishi goto out; 9027512487eSRyusuke Konishi 9037512487eSRyusuke Konishi ret = -EINVAL; 9044f6b8288SRyusuke Konishi nsegs = argv[4].v_nmembs; 9054f6b8288SRyusuke Konishi if (argv[4].v_size != argsz[4]) 9067512487eSRyusuke Konishi goto out; 9071ecd3c7eSXi Wang if (nsegs > UINT_MAX / sizeof(__u64)) 9081ecd3c7eSXi Wang goto out; 9097512487eSRyusuke Konishi 9104f6b8288SRyusuke Konishi /* 9114f6b8288SRyusuke Konishi * argv[4] points to segment numbers this ioctl cleans. We 9124f6b8288SRyusuke Konishi * use kmalloc() for its buffer because memory used for the 9134f6b8288SRyusuke Konishi * segment numbers is enough small. 9144f6b8288SRyusuke Konishi */ 9154f6b8288SRyusuke Konishi kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base, 9164f6b8288SRyusuke Konishi nsegs * sizeof(__u64)); 9177512487eSRyusuke Konishi if (IS_ERR(kbufs[4])) { 9187512487eSRyusuke Konishi ret = PTR_ERR(kbufs[4]); 9197512487eSRyusuke Konishi goto out; 9207512487eSRyusuke Konishi } 921e3154e97SRyusuke Konishi nilfs = inode->i_sb->s_fs_info; 9224f6b8288SRyusuke Konishi 9234f6b8288SRyusuke Konishi for (n = 0; n < 4; n++) { 9244f6b8288SRyusuke Konishi ret = -EINVAL; 9254f6b8288SRyusuke Konishi if (argv[n].v_size != argsz[n]) 9264f6b8288SRyusuke Konishi goto out_free; 9274f6b8288SRyusuke Konishi 9284f6b8288SRyusuke Konishi if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) 9294f6b8288SRyusuke Konishi goto out_free; 9304f6b8288SRyusuke Konishi 931481fe17eSHaogang Chen if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size) 932481fe17eSHaogang Chen goto out_free; 933481fe17eSHaogang Chen 9344f6b8288SRyusuke Konishi len = argv[n].v_size * argv[n].v_nmembs; 9354f6b8288SRyusuke Konishi base = (void __user *)(unsigned long)argv[n].v_base; 9364f6b8288SRyusuke Konishi if (len == 0) { 9374f6b8288SRyusuke Konishi kbufs[n] = NULL; 9384f6b8288SRyusuke Konishi continue; 9394f6b8288SRyusuke Konishi } 9404f6b8288SRyusuke Konishi 9414f6b8288SRyusuke Konishi kbufs[n] = vmalloc(len); 9424f6b8288SRyusuke Konishi if (!kbufs[n]) { 9434f6b8288SRyusuke Konishi ret = -ENOMEM; 9444f6b8288SRyusuke Konishi goto out_free; 9454f6b8288SRyusuke Konishi } 9464f6b8288SRyusuke Konishi if (copy_from_user(kbufs[n], base, len)) { 9474f6b8288SRyusuke Konishi ret = -EFAULT; 9484f6b8288SRyusuke Konishi vfree(kbufs[n]); 9494f6b8288SRyusuke Konishi goto out_free; 9504f6b8288SRyusuke Konishi } 9514f6b8288SRyusuke Konishi } 9524f6b8288SRyusuke Konishi 9531cf58fa8SJiro SEKIBA /* 954263d90ceSRyusuke Konishi * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), 9551cf58fa8SJiro SEKIBA * which will operates an inode list without blocking. 9561cf58fa8SJiro SEKIBA * To protect the list from concurrent operations, 9571cf58fa8SJiro SEKIBA * nilfs_ioctl_move_blocks should be atomic operation. 9581cf58fa8SJiro SEKIBA */ 9591cf58fa8SJiro SEKIBA if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { 9601cf58fa8SJiro SEKIBA ret = -EBUSY; 9611cf58fa8SJiro SEKIBA goto out_free; 9621cf58fa8SJiro SEKIBA } 9631cf58fa8SJiro SEKIBA 964263d90ceSRyusuke Konishi ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); 9651cf58fa8SJiro SEKIBA if (ret < 0) 9661cf58fa8SJiro SEKIBA printk(KERN_ERR "NILFS: GC failed during preparation: " 9671cf58fa8SJiro SEKIBA "cannot read source blocks: err=%d\n", ret); 968a9bae189SVyacheslav Dubeyko else { 969a9bae189SVyacheslav Dubeyko if (nilfs_sb_need_update(nilfs)) 970a9bae189SVyacheslav Dubeyko set_nilfs_discontinued(nilfs); 9714f6b8288SRyusuke Konishi ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); 972a9bae189SVyacheslav Dubeyko } 9734f6b8288SRyusuke Konishi 974263d90ceSRyusuke Konishi nilfs_remove_all_gcinodes(nilfs); 9751cf58fa8SJiro SEKIBA clear_nilfs_gc_running(nilfs); 9761cf58fa8SJiro SEKIBA 9774f6b8288SRyusuke Konishi out_free: 978d5046853SRyusuke Konishi while (--n >= 0) 9794f6b8288SRyusuke Konishi vfree(kbufs[n]); 9804f6b8288SRyusuke Konishi kfree(kbufs[4]); 9817512487eSRyusuke Konishi out: 9822a79f17eSAl Viro mnt_drop_write_file(filp); 9834f6b8288SRyusuke Konishi return ret; 9847942b919SKoji Sato } 9857942b919SKoji Sato 986d623a942SVyacheslav Dubeyko /** 987d623a942SVyacheslav Dubeyko * nilfs_ioctl_sync - make a checkpoint 988d623a942SVyacheslav Dubeyko * @inode: inode object 989d623a942SVyacheslav Dubeyko * @filp: file object 990d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 991d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 992d623a942SVyacheslav Dubeyko * 993d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_sync() function constructs a logical segment 994d623a942SVyacheslav Dubeyko * for checkpointing. This function guarantees that all modified data 995d623a942SVyacheslav Dubeyko * and metadata are written out to the device when it successfully 996d623a942SVyacheslav Dubeyko * returned. 997d623a942SVyacheslav Dubeyko * 998d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is retured. On errors, one of the following 999d623a942SVyacheslav Dubeyko * negative error code is returned. 1000d623a942SVyacheslav Dubeyko * 1001d623a942SVyacheslav Dubeyko * %-EROFS - Read only filesystem. 1002d623a942SVyacheslav Dubeyko * 1003d623a942SVyacheslav Dubeyko * %-EIO - I/O error 1004d623a942SVyacheslav Dubeyko * 1005d623a942SVyacheslav Dubeyko * %-ENOSPC - No space left on device (only in a panic state). 1006d623a942SVyacheslav Dubeyko * 1007d623a942SVyacheslav Dubeyko * %-ERESTARTSYS - Interrupted. 1008d623a942SVyacheslav Dubeyko * 1009d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient memory available. 1010d623a942SVyacheslav Dubeyko * 1011d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during execution of requested operation. 1012d623a942SVyacheslav Dubeyko */ 10137942b919SKoji Sato static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, 10147942b919SKoji Sato unsigned int cmd, void __user *argp) 10157942b919SKoji Sato { 10167942b919SKoji Sato __u64 cno; 10177942b919SKoji Sato int ret; 10180d561f12SJiro SEKIBA struct the_nilfs *nilfs; 10197942b919SKoji Sato 10207942b919SKoji Sato ret = nilfs_construct_segment(inode->i_sb); 10217942b919SKoji Sato if (ret < 0) 10227942b919SKoji Sato return ret; 10237942b919SKoji Sato 1024e3154e97SRyusuke Konishi nilfs = inode->i_sb->s_fs_info; 1025e2c7617aSAndreas Rohner ret = nilfs_flush_device(nilfs); 1026e2c7617aSAndreas Rohner if (ret < 0) 102711475975SRyusuke Konishi return ret; 102811475975SRyusuke Konishi 102911475975SRyusuke Konishi if (argp != NULL) { 10300d561f12SJiro SEKIBA down_read(&nilfs->ns_segctor_sem); 10310d561f12SJiro SEKIBA cno = nilfs->ns_cno - 1; 10320d561f12SJiro SEKIBA up_read(&nilfs->ns_segctor_sem); 10337942b919SKoji Sato if (copy_to_user(argp, &cno, sizeof(cno))) 10347942b919SKoji Sato return -EFAULT; 10357942b919SKoji Sato } 10367942b919SKoji Sato return 0; 10377942b919SKoji Sato } 10387942b919SKoji Sato 1039d623a942SVyacheslav Dubeyko /** 1040d623a942SVyacheslav Dubeyko * nilfs_ioctl_resize - resize NILFS2 volume 1041d623a942SVyacheslav Dubeyko * @inode: inode object 1042d623a942SVyacheslav Dubeyko * @filp: file object 1043d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 1044d623a942SVyacheslav Dubeyko * 1045d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned or error code, otherwise. 1046d623a942SVyacheslav Dubeyko */ 10474e33f9eaSRyusuke Konishi static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, 10484e33f9eaSRyusuke Konishi void __user *argp) 10494e33f9eaSRyusuke Konishi { 10504e33f9eaSRyusuke Konishi __u64 newsize; 10514e33f9eaSRyusuke Konishi int ret = -EPERM; 10524e33f9eaSRyusuke Konishi 10534e33f9eaSRyusuke Konishi if (!capable(CAP_SYS_ADMIN)) 10544e33f9eaSRyusuke Konishi goto out; 10554e33f9eaSRyusuke Konishi 1056a561be71SAl Viro ret = mnt_want_write_file(filp); 10574e33f9eaSRyusuke Konishi if (ret) 10584e33f9eaSRyusuke Konishi goto out; 10594e33f9eaSRyusuke Konishi 10604e33f9eaSRyusuke Konishi ret = -EFAULT; 10614e33f9eaSRyusuke Konishi if (copy_from_user(&newsize, argp, sizeof(newsize))) 10624e33f9eaSRyusuke Konishi goto out_drop_write; 10634e33f9eaSRyusuke Konishi 10644e33f9eaSRyusuke Konishi ret = nilfs_resize_fs(inode->i_sb, newsize); 10654e33f9eaSRyusuke Konishi 10664e33f9eaSRyusuke Konishi out_drop_write: 10672a79f17eSAl Viro mnt_drop_write_file(filp); 10684e33f9eaSRyusuke Konishi out: 10694e33f9eaSRyusuke Konishi return ret; 10704e33f9eaSRyusuke Konishi } 10714e33f9eaSRyusuke Konishi 1072d623a942SVyacheslav Dubeyko /** 1073f9f32c44SAndreas Rohner * nilfs_ioctl_trim_fs() - trim ioctl handle function 1074f9f32c44SAndreas Rohner * @inode: inode object 1075f9f32c44SAndreas Rohner * @argp: pointer on argument from userspace 1076f9f32c44SAndreas Rohner * 1077f9f32c44SAndreas Rohner * Decription: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It 1078f9f32c44SAndreas Rohner * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which 1079f9f32c44SAndreas Rohner * performs the actual trim operation. 1080f9f32c44SAndreas Rohner * 1081f9f32c44SAndreas Rohner * Return Value: On success, 0 is returned or negative error code, otherwise. 1082f9f32c44SAndreas Rohner */ 1083f9f32c44SAndreas Rohner static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp) 1084f9f32c44SAndreas Rohner { 1085f9f32c44SAndreas Rohner struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1086f9f32c44SAndreas Rohner struct request_queue *q = bdev_get_queue(nilfs->ns_bdev); 1087f9f32c44SAndreas Rohner struct fstrim_range range; 1088f9f32c44SAndreas Rohner int ret; 1089f9f32c44SAndreas Rohner 1090f9f32c44SAndreas Rohner if (!capable(CAP_SYS_ADMIN)) 1091f9f32c44SAndreas Rohner return -EPERM; 1092f9f32c44SAndreas Rohner 1093f9f32c44SAndreas Rohner if (!blk_queue_discard(q)) 1094f9f32c44SAndreas Rohner return -EOPNOTSUPP; 1095f9f32c44SAndreas Rohner 1096f9f32c44SAndreas Rohner if (copy_from_user(&range, argp, sizeof(range))) 1097f9f32c44SAndreas Rohner return -EFAULT; 1098f9f32c44SAndreas Rohner 1099f9f32c44SAndreas Rohner range.minlen = max_t(u64, range.minlen, q->limits.discard_granularity); 1100f9f32c44SAndreas Rohner 1101f9f32c44SAndreas Rohner down_read(&nilfs->ns_segctor_sem); 1102f9f32c44SAndreas Rohner ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range); 1103f9f32c44SAndreas Rohner up_read(&nilfs->ns_segctor_sem); 1104f9f32c44SAndreas Rohner 1105f9f32c44SAndreas Rohner if (ret < 0) 1106f9f32c44SAndreas Rohner return ret; 1107f9f32c44SAndreas Rohner 1108f9f32c44SAndreas Rohner if (copy_to_user(argp, &range, sizeof(range))) 1109f9f32c44SAndreas Rohner return -EFAULT; 1110f9f32c44SAndreas Rohner 1111f9f32c44SAndreas Rohner return 0; 1112f9f32c44SAndreas Rohner } 1113f9f32c44SAndreas Rohner 1114f9f32c44SAndreas Rohner /** 1115d623a942SVyacheslav Dubeyko * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated 1116d623a942SVyacheslav Dubeyko * @inode: inode object 1117d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 1118d623a942SVyacheslav Dubeyko * 1119d623a942SVyacheslav Dubeyko * Decription: nilfs_ioctl_set_alloc_range() function defines lower limit 1120d623a942SVyacheslav Dubeyko * of segments in bytes and upper limit of segments in bytes. 1121d623a942SVyacheslav Dubeyko * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility. 1122d623a942SVyacheslav Dubeyko * 1123d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned or error code, otherwise. 1124d623a942SVyacheslav Dubeyko */ 1125619205daSRyusuke Konishi static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) 1126619205daSRyusuke Konishi { 1127619205daSRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1128619205daSRyusuke Konishi __u64 range[2]; 1129619205daSRyusuke Konishi __u64 minseg, maxseg; 1130619205daSRyusuke Konishi unsigned long segbytes; 1131619205daSRyusuke Konishi int ret = -EPERM; 1132619205daSRyusuke Konishi 1133619205daSRyusuke Konishi if (!capable(CAP_SYS_ADMIN)) 1134619205daSRyusuke Konishi goto out; 1135619205daSRyusuke Konishi 1136619205daSRyusuke Konishi ret = -EFAULT; 1137619205daSRyusuke Konishi if (copy_from_user(range, argp, sizeof(__u64[2]))) 1138619205daSRyusuke Konishi goto out; 1139619205daSRyusuke Konishi 1140619205daSRyusuke Konishi ret = -ERANGE; 1141619205daSRyusuke Konishi if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode)) 1142619205daSRyusuke Konishi goto out; 1143619205daSRyusuke Konishi 1144619205daSRyusuke Konishi segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; 1145619205daSRyusuke Konishi 1146619205daSRyusuke Konishi minseg = range[0] + segbytes - 1; 1147619205daSRyusuke Konishi do_div(minseg, segbytes); 1148619205daSRyusuke Konishi maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); 1149619205daSRyusuke Konishi do_div(maxseg, segbytes); 1150619205daSRyusuke Konishi maxseg--; 1151619205daSRyusuke Konishi 1152619205daSRyusuke Konishi ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); 1153619205daSRyusuke Konishi out: 1154619205daSRyusuke Konishi return ret; 1155619205daSRyusuke Konishi } 1156619205daSRyusuke Konishi 1157d623a942SVyacheslav Dubeyko /** 1158d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_info - wrapping function of get metadata info 1159d623a942SVyacheslav Dubeyko * @inode: inode object 1160d623a942SVyacheslav Dubeyko * @filp: file object 1161d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 1162d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 1163d623a942SVyacheslav Dubeyko * @membsz: size of an item in bytes 1164d623a942SVyacheslav Dubeyko * @dofunc: concrete function of getting metadata info 1165d623a942SVyacheslav Dubeyko * 1166d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_get_info() gets metadata info by means of 1167d623a942SVyacheslav Dubeyko * calling dofunc() function. 1168d623a942SVyacheslav Dubeyko * 1169d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and requested metadata info 1170d623a942SVyacheslav Dubeyko * is copied into userspace. On error, one of the following 1171d623a942SVyacheslav Dubeyko * negative error codes is returned. 1172d623a942SVyacheslav Dubeyko * 1173d623a942SVyacheslav Dubeyko * %-EINVAL - Invalid arguments from userspace. 1174d623a942SVyacheslav Dubeyko * 1175d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 1176d623a942SVyacheslav Dubeyko * 1177d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during execution of requested operation. 1178d623a942SVyacheslav Dubeyko */ 117947eb6b9cSRyusuke Konishi static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, 118047eb6b9cSRyusuke Konishi unsigned int cmd, void __user *argp, 118183aca8f4SRyusuke Konishi size_t membsz, 118247eb6b9cSRyusuke Konishi ssize_t (*dofunc)(struct the_nilfs *, 118347eb6b9cSRyusuke Konishi __u64 *, int, 118447eb6b9cSRyusuke Konishi void *, size_t, size_t)) 118547eb6b9cSRyusuke Konishi 118647eb6b9cSRyusuke Konishi { 1187e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 118847eb6b9cSRyusuke Konishi struct nilfs_argv argv; 118947eb6b9cSRyusuke Konishi int ret; 119047eb6b9cSRyusuke Konishi 119147eb6b9cSRyusuke Konishi if (copy_from_user(&argv, argp, sizeof(argv))) 119247eb6b9cSRyusuke Konishi return -EFAULT; 119347eb6b9cSRyusuke Konishi 1194003ff182SRyusuke Konishi if (argv.v_size < membsz) 119583aca8f4SRyusuke Konishi return -EINVAL; 119683aca8f4SRyusuke Konishi 119747eb6b9cSRyusuke Konishi ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); 119847eb6b9cSRyusuke Konishi if (ret < 0) 119947eb6b9cSRyusuke Konishi return ret; 120047eb6b9cSRyusuke Konishi 120147eb6b9cSRyusuke Konishi if (copy_to_user(argp, &argv, sizeof(argv))) 120247eb6b9cSRyusuke Konishi ret = -EFAULT; 120347eb6b9cSRyusuke Konishi return ret; 120447eb6b9cSRyusuke Konishi } 120547eb6b9cSRyusuke Konishi 12062cc88f3aSAndreas Rohner /** 12072cc88f3aSAndreas Rohner * nilfs_ioctl_set_suinfo - set segment usage info 12082cc88f3aSAndreas Rohner * @inode: inode object 12092cc88f3aSAndreas Rohner * @filp: file object 12102cc88f3aSAndreas Rohner * @cmd: ioctl's request code 12112cc88f3aSAndreas Rohner * @argp: pointer on argument from userspace 12122cc88f3aSAndreas Rohner * 12132cc88f3aSAndreas Rohner * Description: Expects an array of nilfs_suinfo_update structures 12142cc88f3aSAndreas Rohner * encapsulated in nilfs_argv and updates the segment usage info 12152cc88f3aSAndreas Rohner * according to the flags in nilfs_suinfo_update. 12162cc88f3aSAndreas Rohner * 12172cc88f3aSAndreas Rohner * Return Value: On success, 0 is returned. On error, one of the 12182cc88f3aSAndreas Rohner * following negative error codes is returned. 12192cc88f3aSAndreas Rohner * 12202cc88f3aSAndreas Rohner * %-EPERM - Not enough permissions 12212cc88f3aSAndreas Rohner * 12222cc88f3aSAndreas Rohner * %-EFAULT - Error copying input data 12232cc88f3aSAndreas Rohner * 12242cc88f3aSAndreas Rohner * %-EIO - I/O error. 12252cc88f3aSAndreas Rohner * 12262cc88f3aSAndreas Rohner * %-ENOMEM - Insufficient amount of memory available. 12272cc88f3aSAndreas Rohner * 12282cc88f3aSAndreas Rohner * %-EINVAL - Invalid values in input (segment number, flags or nblocks) 12292cc88f3aSAndreas Rohner */ 12302cc88f3aSAndreas Rohner static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp, 12312cc88f3aSAndreas Rohner unsigned int cmd, void __user *argp) 12322cc88f3aSAndreas Rohner { 12332cc88f3aSAndreas Rohner struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 12342cc88f3aSAndreas Rohner struct nilfs_transaction_info ti; 12352cc88f3aSAndreas Rohner struct nilfs_argv argv; 12362cc88f3aSAndreas Rohner size_t len; 12372cc88f3aSAndreas Rohner void __user *base; 12382cc88f3aSAndreas Rohner void *kbuf; 12392cc88f3aSAndreas Rohner int ret; 12402cc88f3aSAndreas Rohner 12412cc88f3aSAndreas Rohner if (!capable(CAP_SYS_ADMIN)) 12422cc88f3aSAndreas Rohner return -EPERM; 12432cc88f3aSAndreas Rohner 12442cc88f3aSAndreas Rohner ret = mnt_want_write_file(filp); 12452cc88f3aSAndreas Rohner if (ret) 12462cc88f3aSAndreas Rohner return ret; 12472cc88f3aSAndreas Rohner 12482cc88f3aSAndreas Rohner ret = -EFAULT; 12492cc88f3aSAndreas Rohner if (copy_from_user(&argv, argp, sizeof(argv))) 12502cc88f3aSAndreas Rohner goto out; 12512cc88f3aSAndreas Rohner 12522cc88f3aSAndreas Rohner ret = -EINVAL; 12532cc88f3aSAndreas Rohner if (argv.v_size < sizeof(struct nilfs_suinfo_update)) 12542cc88f3aSAndreas Rohner goto out; 12552cc88f3aSAndreas Rohner 12562cc88f3aSAndreas Rohner if (argv.v_nmembs > nilfs->ns_nsegments) 12572cc88f3aSAndreas Rohner goto out; 12582cc88f3aSAndreas Rohner 12592cc88f3aSAndreas Rohner if (argv.v_nmembs >= UINT_MAX / argv.v_size) 12602cc88f3aSAndreas Rohner goto out; 12612cc88f3aSAndreas Rohner 12622cc88f3aSAndreas Rohner len = argv.v_size * argv.v_nmembs; 12632cc88f3aSAndreas Rohner if (!len) { 12642cc88f3aSAndreas Rohner ret = 0; 12652cc88f3aSAndreas Rohner goto out; 12662cc88f3aSAndreas Rohner } 12672cc88f3aSAndreas Rohner 12682cc88f3aSAndreas Rohner base = (void __user *)(unsigned long)argv.v_base; 12692cc88f3aSAndreas Rohner kbuf = vmalloc(len); 12702cc88f3aSAndreas Rohner if (!kbuf) { 12712cc88f3aSAndreas Rohner ret = -ENOMEM; 12722cc88f3aSAndreas Rohner goto out; 12732cc88f3aSAndreas Rohner } 12742cc88f3aSAndreas Rohner 12752cc88f3aSAndreas Rohner if (copy_from_user(kbuf, base, len)) { 12762cc88f3aSAndreas Rohner ret = -EFAULT; 12772cc88f3aSAndreas Rohner goto out_free; 12782cc88f3aSAndreas Rohner } 12792cc88f3aSAndreas Rohner 12802cc88f3aSAndreas Rohner nilfs_transaction_begin(inode->i_sb, &ti, 0); 12812cc88f3aSAndreas Rohner ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size, 12822cc88f3aSAndreas Rohner argv.v_nmembs); 12832cc88f3aSAndreas Rohner if (unlikely(ret < 0)) 12842cc88f3aSAndreas Rohner nilfs_transaction_abort(inode->i_sb); 12852cc88f3aSAndreas Rohner else 12862cc88f3aSAndreas Rohner nilfs_transaction_commit(inode->i_sb); /* never fails */ 12872cc88f3aSAndreas Rohner 12882cc88f3aSAndreas Rohner out_free: 12892cc88f3aSAndreas Rohner vfree(kbuf); 12902cc88f3aSAndreas Rohner out: 12912cc88f3aSAndreas Rohner mnt_drop_write_file(filp); 12922cc88f3aSAndreas Rohner return ret; 12932cc88f3aSAndreas Rohner } 12942cc88f3aSAndreas Rohner 12957a946193SRyusuke Konishi long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 12967942b919SKoji Sato { 1297496ad9aaSAl Viro struct inode *inode = file_inode(filp); 129875323400SLi Hong void __user *argp = (void __user *)arg; 12997942b919SKoji Sato 13007942b919SKoji Sato switch (cmd) { 1301cde98f0fSRyusuke Konishi case FS_IOC_GETFLAGS: 1302cde98f0fSRyusuke Konishi return nilfs_ioctl_getflags(inode, argp); 1303cde98f0fSRyusuke Konishi case FS_IOC_SETFLAGS: 1304cde98f0fSRyusuke Konishi return nilfs_ioctl_setflags(inode, filp, argp); 1305cde98f0fSRyusuke Konishi case FS_IOC_GETVERSION: 1306cde98f0fSRyusuke Konishi return nilfs_ioctl_getversion(inode, argp); 13077942b919SKoji Sato case NILFS_IOCTL_CHANGE_CPMODE: 13087942b919SKoji Sato return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); 13097942b919SKoji Sato case NILFS_IOCTL_DELETE_CHECKPOINT: 13107942b919SKoji Sato return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); 13117942b919SKoji Sato case NILFS_IOCTL_GET_CPINFO: 131247eb6b9cSRyusuke Konishi return nilfs_ioctl_get_info(inode, filp, cmd, argp, 131383aca8f4SRyusuke Konishi sizeof(struct nilfs_cpinfo), 131447eb6b9cSRyusuke Konishi nilfs_ioctl_do_get_cpinfo); 13157942b919SKoji Sato case NILFS_IOCTL_GET_CPSTAT: 13167942b919SKoji Sato return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); 13177942b919SKoji Sato case NILFS_IOCTL_GET_SUINFO: 131847eb6b9cSRyusuke Konishi return nilfs_ioctl_get_info(inode, filp, cmd, argp, 131983aca8f4SRyusuke Konishi sizeof(struct nilfs_suinfo), 132047eb6b9cSRyusuke Konishi nilfs_ioctl_do_get_suinfo); 13212cc88f3aSAndreas Rohner case NILFS_IOCTL_SET_SUINFO: 13222cc88f3aSAndreas Rohner return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp); 13237942b919SKoji Sato case NILFS_IOCTL_GET_SUSTAT: 13247942b919SKoji Sato return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); 13257942b919SKoji Sato case NILFS_IOCTL_GET_VINFO: 132647eb6b9cSRyusuke Konishi return nilfs_ioctl_get_info(inode, filp, cmd, argp, 132783aca8f4SRyusuke Konishi sizeof(struct nilfs_vinfo), 132847eb6b9cSRyusuke Konishi nilfs_ioctl_do_get_vinfo); 13297942b919SKoji Sato case NILFS_IOCTL_GET_BDESCS: 13307942b919SKoji Sato return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); 13317942b919SKoji Sato case NILFS_IOCTL_CLEAN_SEGMENTS: 13327942b919SKoji Sato return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); 13337942b919SKoji Sato case NILFS_IOCTL_SYNC: 13347942b919SKoji Sato return nilfs_ioctl_sync(inode, filp, cmd, argp); 13354e33f9eaSRyusuke Konishi case NILFS_IOCTL_RESIZE: 13364e33f9eaSRyusuke Konishi return nilfs_ioctl_resize(inode, filp, argp); 1337619205daSRyusuke Konishi case NILFS_IOCTL_SET_ALLOC_RANGE: 1338619205daSRyusuke Konishi return nilfs_ioctl_set_alloc_range(inode, argp); 1339f9f32c44SAndreas Rohner case FITRIM: 1340f9f32c44SAndreas Rohner return nilfs_ioctl_trim_fs(inode, argp); 13417942b919SKoji Sato default: 13427942b919SKoji Sato return -ENOTTY; 13437942b919SKoji Sato } 13447942b919SKoji Sato } 1345828b1c50SRyusuke Konishi 1346828b1c50SRyusuke Konishi #ifdef CONFIG_COMPAT 1347828b1c50SRyusuke Konishi long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1348828b1c50SRyusuke Konishi { 1349828b1c50SRyusuke Konishi switch (cmd) { 1350828b1c50SRyusuke Konishi case FS_IOC32_GETFLAGS: 1351828b1c50SRyusuke Konishi cmd = FS_IOC_GETFLAGS; 1352828b1c50SRyusuke Konishi break; 1353828b1c50SRyusuke Konishi case FS_IOC32_SETFLAGS: 1354828b1c50SRyusuke Konishi cmd = FS_IOC_SETFLAGS; 1355828b1c50SRyusuke Konishi break; 1356828b1c50SRyusuke Konishi case FS_IOC32_GETVERSION: 1357828b1c50SRyusuke Konishi cmd = FS_IOC_GETVERSION; 1358828b1c50SRyusuke Konishi break; 1359695c60f2SThomas Meyer case NILFS_IOCTL_CHANGE_CPMODE: 1360695c60f2SThomas Meyer case NILFS_IOCTL_DELETE_CHECKPOINT: 1361695c60f2SThomas Meyer case NILFS_IOCTL_GET_CPINFO: 1362695c60f2SThomas Meyer case NILFS_IOCTL_GET_CPSTAT: 1363695c60f2SThomas Meyer case NILFS_IOCTL_GET_SUINFO: 13642cc88f3aSAndreas Rohner case NILFS_IOCTL_SET_SUINFO: 1365695c60f2SThomas Meyer case NILFS_IOCTL_GET_SUSTAT: 1366695c60f2SThomas Meyer case NILFS_IOCTL_GET_VINFO: 1367695c60f2SThomas Meyer case NILFS_IOCTL_GET_BDESCS: 1368695c60f2SThomas Meyer case NILFS_IOCTL_CLEAN_SEGMENTS: 1369695c60f2SThomas Meyer case NILFS_IOCTL_SYNC: 1370695c60f2SThomas Meyer case NILFS_IOCTL_RESIZE: 1371695c60f2SThomas Meyer case NILFS_IOCTL_SET_ALLOC_RANGE: 1372f9f32c44SAndreas Rohner case FITRIM: 1373695c60f2SThomas Meyer break; 1374828b1c50SRyusuke Konishi default: 1375828b1c50SRyusuke Konishi return -ENOIOCTLCMD; 1376828b1c50SRyusuke Konishi } 1377828b1c50SRyusuke Konishi return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 1378828b1c50SRyusuke Konishi } 1379828b1c50SRyusuke Konishi #endif 1380