1ae98043fSRyusuke Konishi // SPDX-License-Identifier: GPL-2.0+ 27942b919SKoji Sato /* 3*94ee1d91SRyusuke Konishi * NILFS ioctl operations. 47942b919SKoji Sato * 57942b919SKoji Sato * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation. 67942b919SKoji Sato * 74b420ab4SRyusuke Konishi * Written by Koji Sato. 87942b919SKoji Sato */ 97942b919SKoji Sato 107942b919SKoji Sato #include <linux/fs.h> 117942b919SKoji Sato #include <linux/wait.h> 125a0e3ad6STejun Heo #include <linux/slab.h> 137942b919SKoji Sato #include <linux/capability.h> /* capable() */ 147942b919SKoji Sato #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ 154f6b8288SRyusuke Konishi #include <linux/vmalloc.h> 16828b1c50SRyusuke Konishi #include <linux/compat.h> /* compat_ptr() */ 172a79f17eSAl Viro #include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */ 18ae191838SRyusuke Konishi #include <linux/buffer_head.h> 197c7c436eSMiklos Szeredi #include <linux/fileattr.h> 207942b919SKoji Sato #include "nilfs.h" 217942b919SKoji Sato #include "segment.h" 227942b919SKoji Sato #include "bmap.h" 237942b919SKoji Sato #include "cpfile.h" 247942b919SKoji Sato #include "sufile.h" 257942b919SKoji Sato #include "dat.h" 267942b919SKoji Sato 27d623a942SVyacheslav Dubeyko /** 28d623a942SVyacheslav Dubeyko * nilfs_ioctl_wrap_copy - wrapping function of get/set metadata info 29d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 30d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 31d623a942SVyacheslav Dubeyko * @dir: set of direction flags 32d623a942SVyacheslav Dubeyko * @dofunc: concrete function of get/set metadata info 33d623a942SVyacheslav Dubeyko * 34d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_wrap_copy() gets/sets metadata info by means of 35d623a942SVyacheslav Dubeyko * calling dofunc() function on the basis of @argv argument. 36d623a942SVyacheslav Dubeyko * 37d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and requested metadata info 38d623a942SVyacheslav Dubeyko * is copied into userspace. On error, one of the following 39d623a942SVyacheslav Dubeyko * negative error codes is returned. 40d623a942SVyacheslav Dubeyko * 41d623a942SVyacheslav Dubeyko * %-EINVAL - Invalid arguments from userspace. 42d623a942SVyacheslav Dubeyko * 43d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 44d623a942SVyacheslav Dubeyko * 45d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during execution of requested operation. 46d623a942SVyacheslav Dubeyko */ 477942b919SKoji Sato static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, 487942b919SKoji Sato struct nilfs_argv *argv, int dir, 497942b919SKoji Sato ssize_t (*dofunc)(struct the_nilfs *, 50b028fcfcSRyusuke Konishi __u64 *, int, 517942b919SKoji Sato void *, size_t, size_t)) 527942b919SKoji Sato { 537942b919SKoji Sato void *buf; 54dc498d09SRyusuke Konishi void __user *base = (void __user *)(unsigned long)argv->v_base; 553358b4aaSRyusuke Konishi size_t maxmembs, total, n; 567942b919SKoji Sato ssize_t nr; 577942b919SKoji Sato int ret, i; 58b028fcfcSRyusuke Konishi __u64 pos, ppos; 597942b919SKoji Sato 607942b919SKoji Sato if (argv->v_nmembs == 0) 617942b919SKoji Sato return 0; 627942b919SKoji Sato 633358b4aaSRyusuke Konishi if (argv->v_size > PAGE_SIZE) 643358b4aaSRyusuke Konishi return -EINVAL; 653358b4aaSRyusuke Konishi 664b15d617SWenliang Fan /* 674b15d617SWenliang Fan * Reject pairs of a start item position (argv->v_index) and a 684b15d617SWenliang Fan * total count (argv->v_nmembs) which leads position 'pos' to 694b15d617SWenliang Fan * overflow by the increment at the end of the loop. 704b15d617SWenliang Fan */ 714b15d617SWenliang Fan if (argv->v_index > ~(__u64)0 - argv->v_nmembs) 724b15d617SWenliang Fan return -EINVAL; 734b15d617SWenliang Fan 743358b4aaSRyusuke Konishi buf = (void *)__get_free_pages(GFP_NOFS, 0); 753358b4aaSRyusuke Konishi if (unlikely(!buf)) 767942b919SKoji Sato return -ENOMEM; 773358b4aaSRyusuke Konishi maxmembs = PAGE_SIZE / argv->v_size; 787942b919SKoji Sato 797942b919SKoji Sato ret = 0; 807942b919SKoji Sato total = 0; 81b028fcfcSRyusuke Konishi pos = argv->v_index; 827942b919SKoji Sato for (i = 0; i < argv->v_nmembs; i += n) { 837942b919SKoji Sato n = (argv->v_nmembs - i < maxmembs) ? 847942b919SKoji Sato argv->v_nmembs - i : maxmembs; 857942b919SKoji Sato if ((dir & _IOC_WRITE) && 86dc498d09SRyusuke Konishi copy_from_user(buf, base + argv->v_size * i, 877942b919SKoji Sato argv->v_size * n)) { 887942b919SKoji Sato ret = -EFAULT; 897942b919SKoji Sato break; 907942b919SKoji Sato } 91b028fcfcSRyusuke Konishi ppos = pos; 928acfbf09SPekka Enberg nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, 93b028fcfcSRyusuke Konishi n); 947942b919SKoji Sato if (nr < 0) { 957942b919SKoji Sato ret = nr; 967942b919SKoji Sato break; 977942b919SKoji Sato } 987942b919SKoji Sato if ((dir & _IOC_READ) && 99dc498d09SRyusuke Konishi copy_to_user(base + argv->v_size * i, buf, 100dc498d09SRyusuke Konishi argv->v_size * nr)) { 1017942b919SKoji Sato ret = -EFAULT; 1027942b919SKoji Sato break; 1037942b919SKoji Sato } 1047942b919SKoji Sato total += nr; 105b028fcfcSRyusuke Konishi if ((size_t)nr < n) 106b028fcfcSRyusuke Konishi break; 107b028fcfcSRyusuke Konishi if (pos == ppos) 108b028fcfcSRyusuke Konishi pos += n; 1097942b919SKoji Sato } 1107942b919SKoji Sato argv->v_nmembs = total; 1117942b919SKoji Sato 1123358b4aaSRyusuke Konishi free_pages((unsigned long)buf, 0); 1137942b919SKoji Sato return ret; 1147942b919SKoji Sato } 1157942b919SKoji Sato 116d623a942SVyacheslav Dubeyko /** 1177c7c436eSMiklos Szeredi * nilfs_fileattr_get - ioctl to support lsattr 118d623a942SVyacheslav Dubeyko */ 1197c7c436eSMiklos Szeredi int nilfs_fileattr_get(struct dentry *dentry, struct fileattr *fa) 120cde98f0fSRyusuke Konishi { 1217c7c436eSMiklos Szeredi struct inode *inode = d_inode(dentry); 122cde98f0fSRyusuke Konishi 1237c7c436eSMiklos Szeredi fileattr_fill_flags(fa, NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE); 1247c7c436eSMiklos Szeredi 1257c7c436eSMiklos Szeredi return 0; 126cde98f0fSRyusuke Konishi } 127cde98f0fSRyusuke Konishi 128d623a942SVyacheslav Dubeyko /** 1297c7c436eSMiklos Szeredi * nilfs_fileattr_set - ioctl to support chattr 130d623a942SVyacheslav Dubeyko */ 1317c7c436eSMiklos Szeredi int nilfs_fileattr_set(struct user_namespace *mnt_userns, 1327c7c436eSMiklos Szeredi struct dentry *dentry, struct fileattr *fa) 133cde98f0fSRyusuke Konishi { 1347c7c436eSMiklos Szeredi struct inode *inode = d_inode(dentry); 135cde98f0fSRyusuke Konishi struct nilfs_transaction_info ti; 136cde98f0fSRyusuke Konishi unsigned int flags, oldflags; 137cde98f0fSRyusuke Konishi int ret; 138cde98f0fSRyusuke Konishi 1397c7c436eSMiklos Szeredi if (fileattr_has_fsx(fa)) 1407c7c436eSMiklos Szeredi return -EOPNOTSUPP; 141cde98f0fSRyusuke Konishi 1427c7c436eSMiklos Szeredi flags = nilfs_mask_flags(inode->i_mode, fa->flags); 143cde98f0fSRyusuke Konishi 144cde98f0fSRyusuke Konishi ret = nilfs_transaction_begin(inode->i_sb, &ti, 0); 145cde98f0fSRyusuke Konishi if (ret) 1467c7c436eSMiklos Szeredi return ret; 147cde98f0fSRyusuke Konishi 1487c7c436eSMiklos Szeredi oldflags = NILFS_I(inode)->i_flags & ~FS_FL_USER_MODIFIABLE; 1497c7c436eSMiklos Szeredi NILFS_I(inode)->i_flags = oldflags | (flags & FS_FL_USER_MODIFIABLE); 150cde98f0fSRyusuke Konishi 151cde98f0fSRyusuke Konishi nilfs_set_inode_flags(inode); 152078cd827SDeepa Dinamani inode->i_ctime = current_time(inode); 153cde98f0fSRyusuke Konishi if (IS_SYNC(inode)) 154cde98f0fSRyusuke Konishi nilfs_set_transaction_flag(NILFS_TI_SYNC); 155cde98f0fSRyusuke Konishi 156cde98f0fSRyusuke Konishi nilfs_mark_inode_dirty(inode); 1577c7c436eSMiklos Szeredi return nilfs_transaction_commit(inode->i_sb); 158cde98f0fSRyusuke Konishi } 159cde98f0fSRyusuke Konishi 160d623a942SVyacheslav Dubeyko /** 161d623a942SVyacheslav Dubeyko * nilfs_ioctl_getversion - get info about a file's version (generation number) 162d623a942SVyacheslav Dubeyko */ 163cde98f0fSRyusuke Konishi static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp) 164cde98f0fSRyusuke Konishi { 165cde98f0fSRyusuke Konishi return put_user(inode->i_generation, (int __user *)argp); 166cde98f0fSRyusuke Konishi } 167cde98f0fSRyusuke Konishi 168d623a942SVyacheslav Dubeyko /** 169d623a942SVyacheslav Dubeyko * nilfs_ioctl_change_cpmode - change checkpoint mode (checkpoint/snapshot) 170d623a942SVyacheslav Dubeyko * @inode: inode object 171d623a942SVyacheslav Dubeyko * @filp: file object 172d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 173d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 174d623a942SVyacheslav Dubeyko * 175d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_change_cpmode() function changes mode of 176d623a942SVyacheslav Dubeyko * given checkpoint between checkpoint and snapshot state. This ioctl 177d623a942SVyacheslav Dubeyko * is used in chcp and mkcp utilities. 178d623a942SVyacheslav Dubeyko * 179d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and mode of a checkpoint is 180d623a942SVyacheslav Dubeyko * changed. On error, one of the following negative error codes 181d623a942SVyacheslav Dubeyko * is returned. 182d623a942SVyacheslav Dubeyko * 183d623a942SVyacheslav Dubeyko * %-EPERM - Operation not permitted. 184d623a942SVyacheslav Dubeyko * 185d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during checkpoint mode changing. 186d623a942SVyacheslav Dubeyko */ 1877942b919SKoji Sato static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, 1887942b919SKoji Sato unsigned int cmd, void __user *argp) 1897942b919SKoji Sato { 190e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1917942b919SKoji Sato struct nilfs_transaction_info ti; 1927942b919SKoji Sato struct nilfs_cpmode cpmode; 1937942b919SKoji Sato int ret; 1947942b919SKoji Sato 1957942b919SKoji Sato if (!capable(CAP_SYS_ADMIN)) 1967942b919SKoji Sato return -EPERM; 1977512487eSRyusuke Konishi 198a561be71SAl Viro ret = mnt_want_write_file(filp); 1997512487eSRyusuke Konishi if (ret) 2007512487eSRyusuke Konishi return ret; 2017512487eSRyusuke Konishi 2027512487eSRyusuke Konishi ret = -EFAULT; 2037942b919SKoji Sato if (copy_from_user(&cpmode, argp, sizeof(cpmode))) 2047512487eSRyusuke Konishi goto out; 2057942b919SKoji Sato 206572d8b39SRyusuke Konishi mutex_lock(&nilfs->ns_snapshot_mount_mutex); 2077512487eSRyusuke Konishi 2087942b919SKoji Sato nilfs_transaction_begin(inode->i_sb, &ti, 0); 2097942b919SKoji Sato ret = nilfs_cpfile_change_cpmode( 210e3154e97SRyusuke Konishi nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode); 2117512487eSRyusuke Konishi if (unlikely(ret < 0)) 21247420c79SRyusuke Konishi nilfs_transaction_abort(inode->i_sb); 2137512487eSRyusuke Konishi else 21447420c79SRyusuke Konishi nilfs_transaction_commit(inode->i_sb); /* never fails */ 2157512487eSRyusuke Konishi 216572d8b39SRyusuke Konishi mutex_unlock(&nilfs->ns_snapshot_mount_mutex); 2177512487eSRyusuke Konishi out: 2182a79f17eSAl Viro mnt_drop_write_file(filp); 2197942b919SKoji Sato return ret; 2207942b919SKoji Sato } 2217942b919SKoji Sato 222d623a942SVyacheslav Dubeyko /** 223d623a942SVyacheslav Dubeyko * nilfs_ioctl_delete_checkpoint - remove checkpoint 224d623a942SVyacheslav Dubeyko * @inode: inode object 225d623a942SVyacheslav Dubeyko * @filp: file object 226d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 227d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 228d623a942SVyacheslav Dubeyko * 229d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_delete_checkpoint() function removes 230d623a942SVyacheslav Dubeyko * checkpoint from NILFS2 file system. This ioctl is used in rmcp 231d623a942SVyacheslav Dubeyko * utility. 232d623a942SVyacheslav Dubeyko * 233d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and a checkpoint is 234d623a942SVyacheslav Dubeyko * removed. On error, one of the following negative error codes 235d623a942SVyacheslav Dubeyko * is returned. 236d623a942SVyacheslav Dubeyko * 237d623a942SVyacheslav Dubeyko * %-EPERM - Operation not permitted. 238d623a942SVyacheslav Dubeyko * 239d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during checkpoint removing. 240d623a942SVyacheslav Dubeyko */ 2417942b919SKoji Sato static int 2427942b919SKoji Sato nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, 2437942b919SKoji Sato unsigned int cmd, void __user *argp) 2447942b919SKoji Sato { 245e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 2467942b919SKoji Sato struct nilfs_transaction_info ti; 2477942b919SKoji Sato __u64 cno; 2487942b919SKoji Sato int ret; 2497942b919SKoji Sato 2507942b919SKoji Sato if (!capable(CAP_SYS_ADMIN)) 2517942b919SKoji Sato return -EPERM; 2527512487eSRyusuke Konishi 253a561be71SAl Viro ret = mnt_want_write_file(filp); 2547512487eSRyusuke Konishi if (ret) 2557512487eSRyusuke Konishi return ret; 2567512487eSRyusuke Konishi 2577512487eSRyusuke Konishi ret = -EFAULT; 2587942b919SKoji Sato if (copy_from_user(&cno, argp, sizeof(cno))) 2597512487eSRyusuke Konishi goto out; 2607942b919SKoji Sato 2617942b919SKoji Sato nilfs_transaction_begin(inode->i_sb, &ti, 0); 262e3154e97SRyusuke Konishi ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno); 2637512487eSRyusuke Konishi if (unlikely(ret < 0)) 26447420c79SRyusuke Konishi nilfs_transaction_abort(inode->i_sb); 2657512487eSRyusuke Konishi else 26647420c79SRyusuke Konishi nilfs_transaction_commit(inode->i_sb); /* never fails */ 2677512487eSRyusuke Konishi out: 2682a79f17eSAl Viro mnt_drop_write_file(filp); 2697942b919SKoji Sato return ret; 2707942b919SKoji Sato } 2717942b919SKoji Sato 272d623a942SVyacheslav Dubeyko /** 273d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_cpinfo - callback method getting info about checkpoints 274d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 275d623a942SVyacheslav Dubeyko * @posp: pointer on array of checkpoint's numbers 276d623a942SVyacheslav Dubeyko * @flags: checkpoint mode (checkpoint or snapshot) 277d623a942SVyacheslav Dubeyko * @buf: buffer for storing checkponts' info 278d623a942SVyacheslav Dubeyko * @size: size in bytes of one checkpoint info item in array 279d623a942SVyacheslav Dubeyko * @nmembs: number of checkpoints in array (numbers and infos) 280d623a942SVyacheslav Dubeyko * 281d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_cpinfo() function returns info about 282d623a942SVyacheslav Dubeyko * requested checkpoints. The NILFS_IOCTL_GET_CPINFO ioctl is used in 283d623a942SVyacheslav Dubeyko * lscp utility and by nilfs_cleanerd daemon. 284d623a942SVyacheslav Dubeyko * 285d623a942SVyacheslav Dubeyko * Return value: count of nilfs_cpinfo structures in output buffer. 286d623a942SVyacheslav Dubeyko */ 2877942b919SKoji Sato static ssize_t 288b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 2897942b919SKoji Sato void *buf, size_t size, size_t nmembs) 2907942b919SKoji Sato { 2917942b919SKoji Sato int ret; 2927942b919SKoji Sato 29347420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 29447eb6b9cSRyusuke Konishi ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, 295003ff182SRyusuke Konishi size, nmembs); 29647420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 2977942b919SKoji Sato return ret; 2987942b919SKoji Sato } 2997942b919SKoji Sato 300d623a942SVyacheslav Dubeyko /** 301d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_cpstat - get checkpoints statistics 302d623a942SVyacheslav Dubeyko * @inode: inode object 303d623a942SVyacheslav Dubeyko * @filp: file object 304d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 305d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 306d623a942SVyacheslav Dubeyko * 307d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_get_cpstat() returns information about checkpoints. 308d623a942SVyacheslav Dubeyko * The NILFS_IOCTL_GET_CPSTAT ioctl is used by lscp, rmcp utilities 309d623a942SVyacheslav Dubeyko * and by nilfs_cleanerd daemon. 310d623a942SVyacheslav Dubeyko * 311d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned, and checkpoints information is 312d623a942SVyacheslav Dubeyko * copied into userspace pointer @argp. On error, one of the following 313d623a942SVyacheslav Dubeyko * negative error codes is returned. 314d623a942SVyacheslav Dubeyko * 315d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 316d623a942SVyacheslav Dubeyko * 317d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 318d623a942SVyacheslav Dubeyko * 319d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during getting checkpoints statistics. 320d623a942SVyacheslav Dubeyko */ 3217942b919SKoji Sato static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, 3227942b919SKoji Sato unsigned int cmd, void __user *argp) 3237942b919SKoji Sato { 324e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 3257942b919SKoji Sato struct nilfs_cpstat cpstat; 3267942b919SKoji Sato int ret; 3277942b919SKoji Sato 32847420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 32947420c79SRyusuke Konishi ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); 33047420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 3317942b919SKoji Sato if (ret < 0) 3327942b919SKoji Sato return ret; 3337942b919SKoji Sato 3347942b919SKoji Sato if (copy_to_user(argp, &cpstat, sizeof(cpstat))) 3357942b919SKoji Sato ret = -EFAULT; 3367942b919SKoji Sato return ret; 3377942b919SKoji Sato } 3387942b919SKoji Sato 339d623a942SVyacheslav Dubeyko /** 340d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_suinfo - callback method getting segment usage info 341d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 342d623a942SVyacheslav Dubeyko * @posp: pointer on array of segment numbers 343d623a942SVyacheslav Dubeyko * @flags: *not used* 344d623a942SVyacheslav Dubeyko * @buf: buffer for storing suinfo array 345d623a942SVyacheslav Dubeyko * @size: size in bytes of one suinfo item in array 346d623a942SVyacheslav Dubeyko * @nmembs: count of segment numbers and suinfos in array 347d623a942SVyacheslav Dubeyko * 348d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_suinfo() function returns segment usage 349d623a942SVyacheslav Dubeyko * info about requested segments. The NILFS_IOCTL_GET_SUINFO ioctl is used 350d623a942SVyacheslav Dubeyko * in lssu, nilfs_resize utilities and by nilfs_cleanerd daemon. 351d623a942SVyacheslav Dubeyko * 352d623a942SVyacheslav Dubeyko * Return value: count of nilfs_suinfo structures in output buffer. 353d623a942SVyacheslav Dubeyko */ 3547942b919SKoji Sato static ssize_t 355b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 3567942b919SKoji Sato void *buf, size_t size, size_t nmembs) 3577942b919SKoji Sato { 3587942b919SKoji Sato int ret; 3597942b919SKoji Sato 36047420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 361003ff182SRyusuke Konishi ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, 362003ff182SRyusuke Konishi nmembs); 36347420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 3647942b919SKoji Sato return ret; 3657942b919SKoji Sato } 3667942b919SKoji Sato 367d623a942SVyacheslav Dubeyko /** 368d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_sustat - get segment usage statistics 369d623a942SVyacheslav Dubeyko * @inode: inode object 370d623a942SVyacheslav Dubeyko * @filp: file object 371d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 372d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 373d623a942SVyacheslav Dubeyko * 374d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_get_sustat() returns segment usage statistics. 375d623a942SVyacheslav Dubeyko * The NILFS_IOCTL_GET_SUSTAT ioctl is used in lssu, nilfs_resize utilities 376d623a942SVyacheslav Dubeyko * and by nilfs_cleanerd daemon. 377d623a942SVyacheslav Dubeyko * 378d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned, and segment usage information is 379d623a942SVyacheslav Dubeyko * copied into userspace pointer @argp. On error, one of the following 380d623a942SVyacheslav Dubeyko * negative error codes is returned. 381d623a942SVyacheslav Dubeyko * 382d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 383d623a942SVyacheslav Dubeyko * 384d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 385d623a942SVyacheslav Dubeyko * 386d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during getting segment usage statistics. 387d623a942SVyacheslav Dubeyko */ 3887942b919SKoji Sato static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, 3897942b919SKoji Sato unsigned int cmd, void __user *argp) 3907942b919SKoji Sato { 391e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 3927942b919SKoji Sato struct nilfs_sustat sustat; 3937942b919SKoji Sato int ret; 3947942b919SKoji Sato 39547420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 39647420c79SRyusuke Konishi ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); 39747420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 3987942b919SKoji Sato if (ret < 0) 3997942b919SKoji Sato return ret; 4007942b919SKoji Sato 4017942b919SKoji Sato if (copy_to_user(argp, &sustat, sizeof(sustat))) 4027942b919SKoji Sato ret = -EFAULT; 4037942b919SKoji Sato return ret; 4047942b919SKoji Sato } 4057942b919SKoji Sato 406d623a942SVyacheslav Dubeyko /** 407d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_vinfo - callback method getting virtual blocks info 408d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 409d623a942SVyacheslav Dubeyko * @posp: *not used* 410d623a942SVyacheslav Dubeyko * @flags: *not used* 411d623a942SVyacheslav Dubeyko * @buf: buffer for storing array of nilfs_vinfo structures 412d623a942SVyacheslav Dubeyko * @size: size in bytes of one vinfo item in array 413d623a942SVyacheslav Dubeyko * @nmembs: count of vinfos in array 414d623a942SVyacheslav Dubeyko * 415d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_vinfo() function returns information 416d623a942SVyacheslav Dubeyko * on virtual block addresses. The NILFS_IOCTL_GET_VINFO ioctl is used 417d623a942SVyacheslav Dubeyko * by nilfs_cleanerd daemon. 418d623a942SVyacheslav Dubeyko * 419d623a942SVyacheslav Dubeyko * Return value: count of nilfs_vinfo structures in output buffer. 420d623a942SVyacheslav Dubeyko */ 4217942b919SKoji Sato static ssize_t 422b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, 4237942b919SKoji Sato void *buf, size_t size, size_t nmembs) 4247942b919SKoji Sato { 4257942b919SKoji Sato int ret; 4267942b919SKoji Sato 42747420c79SRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 428365e215cSRyusuke Konishi ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); 42947420c79SRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 4307942b919SKoji Sato return ret; 4317942b919SKoji Sato } 4327942b919SKoji Sato 433d623a942SVyacheslav Dubeyko /** 434d623a942SVyacheslav Dubeyko * nilfs_ioctl_do_get_bdescs - callback method getting disk block descriptors 435d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 436d623a942SVyacheslav Dubeyko * @posp: *not used* 437d623a942SVyacheslav Dubeyko * @flags: *not used* 438d623a942SVyacheslav Dubeyko * @buf: buffer for storing array of nilfs_bdesc structures 439d623a942SVyacheslav Dubeyko * @size: size in bytes of one bdesc item in array 440d623a942SVyacheslav Dubeyko * @nmembs: count of bdescs in array 441d623a942SVyacheslav Dubeyko * 442d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_bdescs() function returns information 443d623a942SVyacheslav Dubeyko * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 444d623a942SVyacheslav Dubeyko * is used by nilfs_cleanerd daemon. 445d623a942SVyacheslav Dubeyko * 446d623a942SVyacheslav Dubeyko * Return value: count of nilfs_bdescs structures in output buffer. 447d623a942SVyacheslav Dubeyko */ 4487942b919SKoji Sato static ssize_t 449b028fcfcSRyusuke Konishi nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, 4507942b919SKoji Sato void *buf, size_t size, size_t nmembs) 4517942b919SKoji Sato { 452365e215cSRyusuke Konishi struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 4537942b919SKoji Sato struct nilfs_bdesc *bdescs = buf; 4547942b919SKoji Sato int ret, i; 4557942b919SKoji Sato 45647eb6b9cSRyusuke Konishi down_read(&nilfs->ns_segctor_sem); 4577942b919SKoji Sato for (i = 0; i < nmembs; i++) { 4587942b919SKoji Sato ret = nilfs_bmap_lookup_at_level(bmap, 4597942b919SKoji Sato bdescs[i].bd_offset, 4607942b919SKoji Sato bdescs[i].bd_level + 1, 4617942b919SKoji Sato &bdescs[i].bd_blocknr); 4627942b919SKoji Sato if (ret < 0) { 46347eb6b9cSRyusuke Konishi if (ret != -ENOENT) { 46447eb6b9cSRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 4657942b919SKoji Sato return ret; 46647eb6b9cSRyusuke Konishi } 4677942b919SKoji Sato bdescs[i].bd_blocknr = 0; 4687942b919SKoji Sato } 4697942b919SKoji Sato } 47047eb6b9cSRyusuke Konishi up_read(&nilfs->ns_segctor_sem); 4717942b919SKoji Sato return nmembs; 4727942b919SKoji Sato } 4737942b919SKoji Sato 474d623a942SVyacheslav Dubeyko /** 475d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_bdescs - get disk block descriptors 476d623a942SVyacheslav Dubeyko * @inode: inode object 477d623a942SVyacheslav Dubeyko * @filp: file object 478d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 479d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 480d623a942SVyacheslav Dubeyko * 481d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_do_get_bdescs() function returns information 482d623a942SVyacheslav Dubeyko * about descriptors of disk block numbers. The NILFS_IOCTL_GET_BDESCS ioctl 483d623a942SVyacheslav Dubeyko * is used by nilfs_cleanerd daemon. 484d623a942SVyacheslav Dubeyko * 485d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned, and disk block descriptors are 486d623a942SVyacheslav Dubeyko * copied into userspace pointer @argp. On error, one of the following 487d623a942SVyacheslav Dubeyko * negative error codes is returned. 488d623a942SVyacheslav Dubeyko * 489d623a942SVyacheslav Dubeyko * %-EINVAL - Invalid arguments from userspace. 490d623a942SVyacheslav Dubeyko * 491d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 492d623a942SVyacheslav Dubeyko * 493d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 494d623a942SVyacheslav Dubeyko * 495d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during getting disk block descriptors. 496d623a942SVyacheslav Dubeyko */ 4977942b919SKoji Sato static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, 4987942b919SKoji Sato unsigned int cmd, void __user *argp) 4997942b919SKoji Sato { 500e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 5017942b919SKoji Sato struct nilfs_argv argv; 5027942b919SKoji Sato int ret; 5037942b919SKoji Sato 5047942b919SKoji Sato if (copy_from_user(&argv, argp, sizeof(argv))) 5057942b919SKoji Sato return -EFAULT; 5067942b919SKoji Sato 50783aca8f4SRyusuke Konishi if (argv.v_size != sizeof(struct nilfs_bdesc)) 50883aca8f4SRyusuke Konishi return -EINVAL; 50983aca8f4SRyusuke Konishi 5107942b919SKoji Sato ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), 5117942b919SKoji Sato nilfs_ioctl_do_get_bdescs); 51247420c79SRyusuke Konishi if (ret < 0) 51347420c79SRyusuke Konishi return ret; 5147942b919SKoji Sato 5157942b919SKoji Sato if (copy_to_user(argp, &argv, sizeof(argv))) 5167942b919SKoji Sato ret = -EFAULT; 5177942b919SKoji Sato return ret; 5187942b919SKoji Sato } 5197942b919SKoji Sato 520d623a942SVyacheslav Dubeyko /** 521d623a942SVyacheslav Dubeyko * nilfs_ioctl_move_inode_block - prepare data/node block for moving by GC 522d623a942SVyacheslav Dubeyko * @inode: inode object 523d623a942SVyacheslav Dubeyko * @vdesc: descriptor of virtual block number 524d623a942SVyacheslav Dubeyko * @buffers: list of moving buffers 525d623a942SVyacheslav Dubeyko * 526d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_move_inode_block() function registers data/node 527d623a942SVyacheslav Dubeyko * buffer in the GC pagecache and submit read request. 528d623a942SVyacheslav Dubeyko * 529d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned. On error, one of the following 530d623a942SVyacheslav Dubeyko * negative error codes is returned. 531d623a942SVyacheslav Dubeyko * 532d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 533d623a942SVyacheslav Dubeyko * 534d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 535d623a942SVyacheslav Dubeyko * 536d623a942SVyacheslav Dubeyko * %-ENOENT - Requested block doesn't exist. 537d623a942SVyacheslav Dubeyko * 538d623a942SVyacheslav Dubeyko * %-EEXIST - Blocks conflict is detected. 539d623a942SVyacheslav Dubeyko */ 5407942b919SKoji Sato static int nilfs_ioctl_move_inode_block(struct inode *inode, 5417942b919SKoji Sato struct nilfs_vdesc *vdesc, 5427942b919SKoji Sato struct list_head *buffers) 5437942b919SKoji Sato { 5447942b919SKoji Sato struct buffer_head *bh; 5457942b919SKoji Sato int ret; 5467942b919SKoji Sato 5477942b919SKoji Sato if (vdesc->vd_flags == 0) 5487942b919SKoji Sato ret = nilfs_gccache_submit_read_data( 5497942b919SKoji Sato inode, vdesc->vd_offset, vdesc->vd_blocknr, 5507942b919SKoji Sato vdesc->vd_vblocknr, &bh); 5517942b919SKoji Sato else 5527942b919SKoji Sato ret = nilfs_gccache_submit_read_node( 5537942b919SKoji Sato inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); 5547942b919SKoji Sato 5557942b919SKoji Sato if (unlikely(ret < 0)) { 5567942b919SKoji Sato if (ret == -ENOENT) 557a1d0747aSJoe Perches nilfs_crit(inode->i_sb, 558feee880fSRyusuke Konishi "%s: invalid virtual block address (%s): ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu", 5597942b919SKoji Sato __func__, vdesc->vd_flags ? "node" : "data", 5607942b919SKoji Sato (unsigned long long)vdesc->vd_ino, 5617942b919SKoji Sato (unsigned long long)vdesc->vd_cno, 5627942b919SKoji Sato (unsigned long long)vdesc->vd_offset, 5637942b919SKoji Sato (unsigned long long)vdesc->vd_blocknr, 5647942b919SKoji Sato (unsigned long long)vdesc->vd_vblocknr); 5657942b919SKoji Sato return ret; 5667942b919SKoji Sato } 5675399dd1fSRyusuke Konishi if (unlikely(!list_empty(&bh->b_assoc_buffers))) { 568a1d0747aSJoe Perches nilfs_crit(inode->i_sb, 569feee880fSRyusuke Konishi "%s: conflicting %s buffer: ino=%llu, cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu", 5705399dd1fSRyusuke Konishi __func__, vdesc->vd_flags ? "node" : "data", 5715399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_ino, 5725399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_cno, 5735399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_offset, 5745399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_blocknr, 5755399dd1fSRyusuke Konishi (unsigned long long)vdesc->vd_vblocknr); 5765399dd1fSRyusuke Konishi brelse(bh); 5775399dd1fSRyusuke Konishi return -EEXIST; 5785399dd1fSRyusuke Konishi } 5797942b919SKoji Sato list_add_tail(&bh->b_assoc_buffers, buffers); 5807942b919SKoji Sato return 0; 5817942b919SKoji Sato } 5827942b919SKoji Sato 583d623a942SVyacheslav Dubeyko /** 584d623a942SVyacheslav Dubeyko * nilfs_ioctl_move_blocks - move valid inode's blocks during garbage collection 585d623a942SVyacheslav Dubeyko * @sb: superblock object 586d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 587d623a942SVyacheslav Dubeyko * @buf: array of nilfs_vdesc structures 588d623a942SVyacheslav Dubeyko * 589d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_move_blocks() function reads valid data/node 590d623a942SVyacheslav Dubeyko * blocks that garbage collector specified with the array of nilfs_vdesc 591d623a942SVyacheslav Dubeyko * structures and stores them into page caches of GC inodes. 592d623a942SVyacheslav Dubeyko * 593d623a942SVyacheslav Dubeyko * Return Value: Number of processed nilfs_vdesc structures or 594d623a942SVyacheslav Dubeyko * error code, otherwise. 595d623a942SVyacheslav Dubeyko */ 596263d90ceSRyusuke Konishi static int nilfs_ioctl_move_blocks(struct super_block *sb, 5974f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 5987942b919SKoji Sato { 5994f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 600e3154e97SRyusuke Konishi struct the_nilfs *nilfs = sb->s_fs_info; 6017942b919SKoji Sato struct inode *inode; 6027942b919SKoji Sato struct nilfs_vdesc *vdesc; 6037942b919SKoji Sato struct buffer_head *bh, *n; 6047942b919SKoji Sato LIST_HEAD(buffers); 6057942b919SKoji Sato ino_t ino; 6067942b919SKoji Sato __u64 cno; 6077942b919SKoji Sato int i, ret; 6087942b919SKoji Sato 6097942b919SKoji Sato for (i = 0, vdesc = buf; i < nmembs; ) { 6107942b919SKoji Sato ino = vdesc->vd_ino; 6117942b919SKoji Sato cno = vdesc->vd_cno; 612263d90ceSRyusuke Konishi inode = nilfs_iget_for_gc(sb, ino, cno); 613103cfcf5SDan Carpenter if (IS_ERR(inode)) { 614103cfcf5SDan Carpenter ret = PTR_ERR(inode); 6157942b919SKoji Sato goto failed; 6167942b919SKoji Sato } 617947b10aeSRyusuke Konishi if (list_empty(&NILFS_I(inode)->i_dirty)) { 618947b10aeSRyusuke Konishi /* 619947b10aeSRyusuke Konishi * Add the inode to GC inode list. Garbage Collection 620947b10aeSRyusuke Konishi * is serialized and no two processes manipulate the 621947b10aeSRyusuke Konishi * list simultaneously. 622947b10aeSRyusuke Konishi */ 623947b10aeSRyusuke Konishi igrab(inode); 624947b10aeSRyusuke Konishi list_add(&NILFS_I(inode)->i_dirty, 625947b10aeSRyusuke Konishi &nilfs->ns_gc_inodes); 626947b10aeSRyusuke Konishi } 627947b10aeSRyusuke Konishi 6287942b919SKoji Sato do { 6297942b919SKoji Sato ret = nilfs_ioctl_move_inode_block(inode, vdesc, 6307942b919SKoji Sato &buffers); 631263d90ceSRyusuke Konishi if (unlikely(ret < 0)) { 632263d90ceSRyusuke Konishi iput(inode); 6337942b919SKoji Sato goto failed; 634263d90ceSRyusuke Konishi } 6357942b919SKoji Sato vdesc++; 6367942b919SKoji Sato } while (++i < nmembs && 6377942b919SKoji Sato vdesc->vd_ino == ino && vdesc->vd_cno == cno); 638263d90ceSRyusuke Konishi 639263d90ceSRyusuke Konishi iput(inode); /* The inode still remains in GC inode list */ 6407942b919SKoji Sato } 6417942b919SKoji Sato 6427942b919SKoji Sato list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 6437942b919SKoji Sato ret = nilfs_gccache_wait_and_mark_dirty(bh); 6447942b919SKoji Sato if (unlikely(ret < 0)) { 6455399dd1fSRyusuke Konishi WARN_ON(ret == -EEXIST); 6467942b919SKoji Sato goto failed; 6477942b919SKoji Sato } 6487942b919SKoji Sato list_del_init(&bh->b_assoc_buffers); 6497942b919SKoji Sato brelse(bh); 6507942b919SKoji Sato } 6517942b919SKoji Sato return nmembs; 6527942b919SKoji Sato 6537942b919SKoji Sato failed: 6547942b919SKoji Sato list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { 6557942b919SKoji Sato list_del_init(&bh->b_assoc_buffers); 6567942b919SKoji Sato brelse(bh); 6577942b919SKoji Sato } 6587942b919SKoji Sato return ret; 6597942b919SKoji Sato } 6607942b919SKoji Sato 661d623a942SVyacheslav Dubeyko /** 662d623a942SVyacheslav Dubeyko * nilfs_ioctl_delete_checkpoints - delete checkpoints 663d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 664d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 665d623a942SVyacheslav Dubeyko * @buf: array of periods of checkpoints numbers 666d623a942SVyacheslav Dubeyko * 667d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_delete_checkpoints() function deletes checkpoints 668d623a942SVyacheslav Dubeyko * in the period from p_start to p_end, excluding p_end itself. The checkpoints 669d623a942SVyacheslav Dubeyko * which have been already deleted are ignored. 670d623a942SVyacheslav Dubeyko * 671d623a942SVyacheslav Dubeyko * Return Value: Number of processed nilfs_period structures or 672d623a942SVyacheslav Dubeyko * error code, otherwise. 673d623a942SVyacheslav Dubeyko * 674d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 675d623a942SVyacheslav Dubeyko * 676d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 677d623a942SVyacheslav Dubeyko * 678d623a942SVyacheslav Dubeyko * %-EINVAL - invalid checkpoints. 679d623a942SVyacheslav Dubeyko */ 6804f6b8288SRyusuke Konishi static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, 6814f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 6827942b919SKoji Sato { 6834f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 6847942b919SKoji Sato struct inode *cpfile = nilfs->ns_cpfile; 6857942b919SKoji Sato struct nilfs_period *periods = buf; 6867942b919SKoji Sato int ret, i; 6877942b919SKoji Sato 6887942b919SKoji Sato for (i = 0; i < nmembs; i++) { 6897942b919SKoji Sato ret = nilfs_cpfile_delete_checkpoints( 6907942b919SKoji Sato cpfile, periods[i].p_start, periods[i].p_end); 6917942b919SKoji Sato if (ret < 0) 6927942b919SKoji Sato return ret; 6937942b919SKoji Sato } 6947942b919SKoji Sato return nmembs; 6957942b919SKoji Sato } 6967942b919SKoji Sato 697d623a942SVyacheslav Dubeyko /** 698d623a942SVyacheslav Dubeyko * nilfs_ioctl_free_vblocknrs - free virtual block numbers 699d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 700d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 701d623a942SVyacheslav Dubeyko * @buf: array of virtual block numbers 702d623a942SVyacheslav Dubeyko * 703d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_free_vblocknrs() function frees 704d623a942SVyacheslav Dubeyko * the virtual block numbers specified by @buf and @argv->v_nmembs. 705d623a942SVyacheslav Dubeyko * 706d623a942SVyacheslav Dubeyko * Return Value: Number of processed virtual block numbers or 707d623a942SVyacheslav Dubeyko * error code, otherwise. 708d623a942SVyacheslav Dubeyko * 709d623a942SVyacheslav Dubeyko * %-EIO - I/O error. 710d623a942SVyacheslav Dubeyko * 711d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 712d623a942SVyacheslav Dubeyko * 713d623a942SVyacheslav Dubeyko * %-ENOENT - The virtual block number have not been allocated. 714d623a942SVyacheslav Dubeyko */ 7154f6b8288SRyusuke Konishi static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, 7164f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 7177942b919SKoji Sato { 7184f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 7194f6b8288SRyusuke Konishi int ret; 7207942b919SKoji Sato 721365e215cSRyusuke Konishi ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); 7227942b919SKoji Sato 7237942b919SKoji Sato return (ret < 0) ? ret : nmembs; 7247942b919SKoji Sato } 7257942b919SKoji Sato 726d623a942SVyacheslav Dubeyko /** 727d623a942SVyacheslav Dubeyko * nilfs_ioctl_mark_blocks_dirty - mark blocks dirty 728d623a942SVyacheslav Dubeyko * @nilfs: nilfs object 729d623a942SVyacheslav Dubeyko * @argv: vector of arguments from userspace 730d623a942SVyacheslav Dubeyko * @buf: array of block descriptors 731d623a942SVyacheslav Dubeyko * 732d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_mark_blocks_dirty() function marks 733d623a942SVyacheslav Dubeyko * metadata file or data blocks as dirty. 734d623a942SVyacheslav Dubeyko * 735d623a942SVyacheslav Dubeyko * Return Value: Number of processed block descriptors or 736d623a942SVyacheslav Dubeyko * error code, otherwise. 737d623a942SVyacheslav Dubeyko * 738d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient memory available. 739d623a942SVyacheslav Dubeyko * 740d623a942SVyacheslav Dubeyko * %-EIO - I/O error 741d623a942SVyacheslav Dubeyko * 742d623a942SVyacheslav Dubeyko * %-ENOENT - the specified block does not exist (hole block) 743d623a942SVyacheslav Dubeyko */ 7444f6b8288SRyusuke Konishi static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, 7454f6b8288SRyusuke Konishi struct nilfs_argv *argv, void *buf) 7467942b919SKoji Sato { 7474f6b8288SRyusuke Konishi size_t nmembs = argv->v_nmembs; 748365e215cSRyusuke Konishi struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; 7497942b919SKoji Sato struct nilfs_bdesc *bdescs = buf; 75024e20eadSRyusuke Konishi struct buffer_head *bh; 7517942b919SKoji Sato int ret, i; 7527942b919SKoji Sato 7537942b919SKoji Sato for (i = 0; i < nmembs; i++) { 7547942b919SKoji Sato /* XXX: use macro or inline func to check liveness */ 7557942b919SKoji Sato ret = nilfs_bmap_lookup_at_level(bmap, 7567942b919SKoji Sato bdescs[i].bd_offset, 7577942b919SKoji Sato bdescs[i].bd_level + 1, 7587942b919SKoji Sato &bdescs[i].bd_blocknr); 7597942b919SKoji Sato if (ret < 0) { 7607942b919SKoji Sato if (ret != -ENOENT) 7617942b919SKoji Sato return ret; 7627942b919SKoji Sato bdescs[i].bd_blocknr = 0; 7637942b919SKoji Sato } 7647942b919SKoji Sato if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) 7657942b919SKoji Sato /* skip dead block */ 7667942b919SKoji Sato continue; 7677942b919SKoji Sato if (bdescs[i].bd_level == 0) { 76824e20eadSRyusuke Konishi ret = nilfs_mdt_get_block(nilfs->ns_dat, 76924e20eadSRyusuke Konishi bdescs[i].bd_offset, 77024e20eadSRyusuke Konishi false, NULL, &bh); 77124e20eadSRyusuke Konishi if (unlikely(ret)) { 7721f5abe7eSRyusuke Konishi WARN_ON(ret == -ENOENT); 7737942b919SKoji Sato return ret; 7747942b919SKoji Sato } 77524e20eadSRyusuke Konishi mark_buffer_dirty(bh); 77624e20eadSRyusuke Konishi nilfs_mdt_mark_dirty(nilfs->ns_dat); 77724e20eadSRyusuke Konishi put_bh(bh); 7787942b919SKoji Sato } else { 7797942b919SKoji Sato ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, 7807942b919SKoji Sato bdescs[i].bd_level); 7817942b919SKoji Sato if (ret < 0) { 7821f5abe7eSRyusuke Konishi WARN_ON(ret == -ENOENT); 7837942b919SKoji Sato return ret; 7847942b919SKoji Sato } 7857942b919SKoji Sato } 7867942b919SKoji Sato } 7877942b919SKoji Sato return nmembs; 7887942b919SKoji Sato } 7897942b919SKoji Sato 7907942b919SKoji Sato int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, 7914f6b8288SRyusuke Konishi struct nilfs_argv *argv, void **kbufs) 7927942b919SKoji Sato { 7931f5abe7eSRyusuke Konishi const char *msg; 7944f6b8288SRyusuke Konishi int ret; 7957942b919SKoji Sato 7964f6b8288SRyusuke Konishi ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); 7971f5abe7eSRyusuke Konishi if (ret < 0) { 7981f5abe7eSRyusuke Konishi /* 7991f5abe7eSRyusuke Konishi * can safely abort because checkpoints can be removed 8001f5abe7eSRyusuke Konishi * independently. 8011f5abe7eSRyusuke Konishi */ 8021f5abe7eSRyusuke Konishi msg = "cannot delete checkpoints"; 8031f5abe7eSRyusuke Konishi goto failed; 8041f5abe7eSRyusuke Konishi } 8054f6b8288SRyusuke Konishi ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); 8061f5abe7eSRyusuke Konishi if (ret < 0) { 8071f5abe7eSRyusuke Konishi /* 8081f5abe7eSRyusuke Konishi * can safely abort because DAT file is updated atomically 8091f5abe7eSRyusuke Konishi * using a copy-on-write technique. 8101f5abe7eSRyusuke Konishi */ 8111f5abe7eSRyusuke Konishi msg = "cannot delete virtual blocks from DAT file"; 8121f5abe7eSRyusuke Konishi goto failed; 8131f5abe7eSRyusuke Konishi } 8144f6b8288SRyusuke Konishi ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); 8151f5abe7eSRyusuke Konishi if (ret < 0) { 8161f5abe7eSRyusuke Konishi /* 8171f5abe7eSRyusuke Konishi * can safely abort because the operation is nondestructive. 8181f5abe7eSRyusuke Konishi */ 8191f5abe7eSRyusuke Konishi msg = "cannot mark copying blocks dirty"; 8201f5abe7eSRyusuke Konishi goto failed; 8211f5abe7eSRyusuke Konishi } 8227942b919SKoji Sato return 0; 8237942b919SKoji Sato 8241f5abe7eSRyusuke Konishi failed: 825a1d0747aSJoe Perches nilfs_err(nilfs->ns_sb, "error %d preparing GC: %s", ret, msg); 8267942b919SKoji Sato return ret; 8277942b919SKoji Sato } 8287942b919SKoji Sato 829d623a942SVyacheslav Dubeyko /** 830d623a942SVyacheslav Dubeyko * nilfs_ioctl_clean_segments - clean segments 831d623a942SVyacheslav Dubeyko * @inode: inode object 832d623a942SVyacheslav Dubeyko * @filp: file object 833d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 834d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 835d623a942SVyacheslav Dubeyko * 836d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_clean_segments() function makes garbage 837d623a942SVyacheslav Dubeyko * collection operation in the environment of requested parameters 838d623a942SVyacheslav Dubeyko * from userspace. The NILFS_IOCTL_CLEAN_SEGMENTS ioctl is used by 839d623a942SVyacheslav Dubeyko * nilfs_cleanerd daemon. 840d623a942SVyacheslav Dubeyko * 841d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned or error code, otherwise. 842d623a942SVyacheslav Dubeyko */ 8437942b919SKoji Sato static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, 8447942b919SKoji Sato unsigned int cmd, void __user *argp) 8457942b919SKoji Sato { 8464f6b8288SRyusuke Konishi struct nilfs_argv argv[5]; 84733e189bdSTobias Klauser static const size_t argsz[5] = { 8484f6b8288SRyusuke Konishi sizeof(struct nilfs_vdesc), 8494f6b8288SRyusuke Konishi sizeof(struct nilfs_period), 8504f6b8288SRyusuke Konishi sizeof(__u64), 8514f6b8288SRyusuke Konishi sizeof(struct nilfs_bdesc), 8524f6b8288SRyusuke Konishi sizeof(__u64), 8534f6b8288SRyusuke Konishi }; 8544f6b8288SRyusuke Konishi void __user *base; 8554f6b8288SRyusuke Konishi void *kbufs[5]; 8564f6b8288SRyusuke Konishi struct the_nilfs *nilfs; 8574f6b8288SRyusuke Konishi size_t len, nsegs; 8584f6b8288SRyusuke Konishi int n, ret; 8594f6b8288SRyusuke Konishi 8607942b919SKoji Sato if (!capable(CAP_SYS_ADMIN)) 8617942b919SKoji Sato return -EPERM; 8624f6b8288SRyusuke Konishi 863a561be71SAl Viro ret = mnt_want_write_file(filp); 8647512487eSRyusuke Konishi if (ret) 8657512487eSRyusuke Konishi return ret; 8664f6b8288SRyusuke Konishi 8677512487eSRyusuke Konishi ret = -EFAULT; 8687512487eSRyusuke Konishi if (copy_from_user(argv, argp, sizeof(argv))) 8697512487eSRyusuke Konishi goto out; 8707512487eSRyusuke Konishi 8717512487eSRyusuke Konishi ret = -EINVAL; 8724f6b8288SRyusuke Konishi nsegs = argv[4].v_nmembs; 8734f6b8288SRyusuke Konishi if (argv[4].v_size != argsz[4]) 8747512487eSRyusuke Konishi goto out; 8751ecd3c7eSXi Wang if (nsegs > UINT_MAX / sizeof(__u64)) 8761ecd3c7eSXi Wang goto out; 8777512487eSRyusuke Konishi 8784f6b8288SRyusuke Konishi /* 8794f6b8288SRyusuke Konishi * argv[4] points to segment numbers this ioctl cleans. We 8804f6b8288SRyusuke Konishi * use kmalloc() for its buffer because memory used for the 8814f6b8288SRyusuke Konishi * segment numbers is enough small. 8824f6b8288SRyusuke Konishi */ 8834f6b8288SRyusuke Konishi kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base, 8844f6b8288SRyusuke Konishi nsegs * sizeof(__u64)); 8857512487eSRyusuke Konishi if (IS_ERR(kbufs[4])) { 8867512487eSRyusuke Konishi ret = PTR_ERR(kbufs[4]); 8877512487eSRyusuke Konishi goto out; 8887512487eSRyusuke Konishi } 889e3154e97SRyusuke Konishi nilfs = inode->i_sb->s_fs_info; 8904f6b8288SRyusuke Konishi 8914f6b8288SRyusuke Konishi for (n = 0; n < 4; n++) { 8924f6b8288SRyusuke Konishi ret = -EINVAL; 8934f6b8288SRyusuke Konishi if (argv[n].v_size != argsz[n]) 8944f6b8288SRyusuke Konishi goto out_free; 8954f6b8288SRyusuke Konishi 8964f6b8288SRyusuke Konishi if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) 8974f6b8288SRyusuke Konishi goto out_free; 8984f6b8288SRyusuke Konishi 899481fe17eSHaogang Chen if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size) 900481fe17eSHaogang Chen goto out_free; 901481fe17eSHaogang Chen 9024f6b8288SRyusuke Konishi len = argv[n].v_size * argv[n].v_nmembs; 9034f6b8288SRyusuke Konishi base = (void __user *)(unsigned long)argv[n].v_base; 9044f6b8288SRyusuke Konishi if (len == 0) { 9054f6b8288SRyusuke Konishi kbufs[n] = NULL; 9064f6b8288SRyusuke Konishi continue; 9074f6b8288SRyusuke Konishi } 9084f6b8288SRyusuke Konishi 9094f6b8288SRyusuke Konishi kbufs[n] = vmalloc(len); 9104f6b8288SRyusuke Konishi if (!kbufs[n]) { 9114f6b8288SRyusuke Konishi ret = -ENOMEM; 9124f6b8288SRyusuke Konishi goto out_free; 9134f6b8288SRyusuke Konishi } 9144f6b8288SRyusuke Konishi if (copy_from_user(kbufs[n], base, len)) { 9154f6b8288SRyusuke Konishi ret = -EFAULT; 9164f6b8288SRyusuke Konishi vfree(kbufs[n]); 9174f6b8288SRyusuke Konishi goto out_free; 9184f6b8288SRyusuke Konishi } 9194f6b8288SRyusuke Konishi } 9204f6b8288SRyusuke Konishi 9211cf58fa8SJiro SEKIBA /* 922263d90ceSRyusuke Konishi * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), 9231cf58fa8SJiro SEKIBA * which will operates an inode list without blocking. 9241cf58fa8SJiro SEKIBA * To protect the list from concurrent operations, 9251cf58fa8SJiro SEKIBA * nilfs_ioctl_move_blocks should be atomic operation. 9261cf58fa8SJiro SEKIBA */ 9271cf58fa8SJiro SEKIBA if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { 9281cf58fa8SJiro SEKIBA ret = -EBUSY; 9291cf58fa8SJiro SEKIBA goto out_free; 9301cf58fa8SJiro SEKIBA } 9311cf58fa8SJiro SEKIBA 932263d90ceSRyusuke Konishi ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); 933feee880fSRyusuke Konishi if (ret < 0) { 934a1d0747aSJoe Perches nilfs_err(inode->i_sb, 935feee880fSRyusuke Konishi "error %d preparing GC: cannot read source blocks", 936feee880fSRyusuke Konishi ret); 937feee880fSRyusuke Konishi } else { 938a9bae189SVyacheslav Dubeyko if (nilfs_sb_need_update(nilfs)) 939a9bae189SVyacheslav Dubeyko set_nilfs_discontinued(nilfs); 9404f6b8288SRyusuke Konishi ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); 941a9bae189SVyacheslav Dubeyko } 9424f6b8288SRyusuke Konishi 943263d90ceSRyusuke Konishi nilfs_remove_all_gcinodes(nilfs); 9441cf58fa8SJiro SEKIBA clear_nilfs_gc_running(nilfs); 9451cf58fa8SJiro SEKIBA 9464f6b8288SRyusuke Konishi out_free: 947d5046853SRyusuke Konishi while (--n >= 0) 9484f6b8288SRyusuke Konishi vfree(kbufs[n]); 9494f6b8288SRyusuke Konishi kfree(kbufs[4]); 9507512487eSRyusuke Konishi out: 9512a79f17eSAl Viro mnt_drop_write_file(filp); 9524f6b8288SRyusuke Konishi return ret; 9537942b919SKoji Sato } 9547942b919SKoji Sato 955d623a942SVyacheslav Dubeyko /** 956d623a942SVyacheslav Dubeyko * nilfs_ioctl_sync - make a checkpoint 957d623a942SVyacheslav Dubeyko * @inode: inode object 958d623a942SVyacheslav Dubeyko * @filp: file object 959d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 960d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 961d623a942SVyacheslav Dubeyko * 962d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_sync() function constructs a logical segment 963d623a942SVyacheslav Dubeyko * for checkpointing. This function guarantees that all modified data 964d623a942SVyacheslav Dubeyko * and metadata are written out to the device when it successfully 965d623a942SVyacheslav Dubeyko * returned. 966d623a942SVyacheslav Dubeyko * 967d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is retured. On errors, one of the following 968d623a942SVyacheslav Dubeyko * negative error code is returned. 969d623a942SVyacheslav Dubeyko * 970d623a942SVyacheslav Dubeyko * %-EROFS - Read only filesystem. 971d623a942SVyacheslav Dubeyko * 972d623a942SVyacheslav Dubeyko * %-EIO - I/O error 973d623a942SVyacheslav Dubeyko * 974d623a942SVyacheslav Dubeyko * %-ENOSPC - No space left on device (only in a panic state). 975d623a942SVyacheslav Dubeyko * 976d623a942SVyacheslav Dubeyko * %-ERESTARTSYS - Interrupted. 977d623a942SVyacheslav Dubeyko * 978d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient memory available. 979d623a942SVyacheslav Dubeyko * 980d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during execution of requested operation. 981d623a942SVyacheslav Dubeyko */ 9827942b919SKoji Sato static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, 9837942b919SKoji Sato unsigned int cmd, void __user *argp) 9847942b919SKoji Sato { 9857942b919SKoji Sato __u64 cno; 9867942b919SKoji Sato int ret; 9870d561f12SJiro SEKIBA struct the_nilfs *nilfs; 9887942b919SKoji Sato 9897942b919SKoji Sato ret = nilfs_construct_segment(inode->i_sb); 9907942b919SKoji Sato if (ret < 0) 9917942b919SKoji Sato return ret; 9927942b919SKoji Sato 993e3154e97SRyusuke Konishi nilfs = inode->i_sb->s_fs_info; 994e2c7617aSAndreas Rohner ret = nilfs_flush_device(nilfs); 995e2c7617aSAndreas Rohner if (ret < 0) 99611475975SRyusuke Konishi return ret; 99711475975SRyusuke Konishi 99811475975SRyusuke Konishi if (argp != NULL) { 9990d561f12SJiro SEKIBA down_read(&nilfs->ns_segctor_sem); 10000d561f12SJiro SEKIBA cno = nilfs->ns_cno - 1; 10010d561f12SJiro SEKIBA up_read(&nilfs->ns_segctor_sem); 10027942b919SKoji Sato if (copy_to_user(argp, &cno, sizeof(cno))) 10037942b919SKoji Sato return -EFAULT; 10047942b919SKoji Sato } 10057942b919SKoji Sato return 0; 10067942b919SKoji Sato } 10077942b919SKoji Sato 1008d623a942SVyacheslav Dubeyko /** 1009d623a942SVyacheslav Dubeyko * nilfs_ioctl_resize - resize NILFS2 volume 1010d623a942SVyacheslav Dubeyko * @inode: inode object 1011d623a942SVyacheslav Dubeyko * @filp: file object 1012d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 1013d623a942SVyacheslav Dubeyko * 1014d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned or error code, otherwise. 1015d623a942SVyacheslav Dubeyko */ 10164e33f9eaSRyusuke Konishi static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, 10174e33f9eaSRyusuke Konishi void __user *argp) 10184e33f9eaSRyusuke Konishi { 10194e33f9eaSRyusuke Konishi __u64 newsize; 10204e33f9eaSRyusuke Konishi int ret = -EPERM; 10214e33f9eaSRyusuke Konishi 10224e33f9eaSRyusuke Konishi if (!capable(CAP_SYS_ADMIN)) 10234e33f9eaSRyusuke Konishi goto out; 10244e33f9eaSRyusuke Konishi 1025a561be71SAl Viro ret = mnt_want_write_file(filp); 10264e33f9eaSRyusuke Konishi if (ret) 10274e33f9eaSRyusuke Konishi goto out; 10284e33f9eaSRyusuke Konishi 10294e33f9eaSRyusuke Konishi ret = -EFAULT; 10304e33f9eaSRyusuke Konishi if (copy_from_user(&newsize, argp, sizeof(newsize))) 10314e33f9eaSRyusuke Konishi goto out_drop_write; 10324e33f9eaSRyusuke Konishi 10334e33f9eaSRyusuke Konishi ret = nilfs_resize_fs(inode->i_sb, newsize); 10344e33f9eaSRyusuke Konishi 10354e33f9eaSRyusuke Konishi out_drop_write: 10362a79f17eSAl Viro mnt_drop_write_file(filp); 10374e33f9eaSRyusuke Konishi out: 10384e33f9eaSRyusuke Konishi return ret; 10394e33f9eaSRyusuke Konishi } 10404e33f9eaSRyusuke Konishi 1041d623a942SVyacheslav Dubeyko /** 1042f9f32c44SAndreas Rohner * nilfs_ioctl_trim_fs() - trim ioctl handle function 1043f9f32c44SAndreas Rohner * @inode: inode object 1044f9f32c44SAndreas Rohner * @argp: pointer on argument from userspace 1045f9f32c44SAndreas Rohner * 1046312f79c4SLu Jialin * Description: nilfs_ioctl_trim_fs is the FITRIM ioctl handle function. It 1047f9f32c44SAndreas Rohner * checks the arguments from userspace and calls nilfs_sufile_trim_fs, which 1048f9f32c44SAndreas Rohner * performs the actual trim operation. 1049f9f32c44SAndreas Rohner * 1050f9f32c44SAndreas Rohner * Return Value: On success, 0 is returned or negative error code, otherwise. 1051f9f32c44SAndreas Rohner */ 1052f9f32c44SAndreas Rohner static int nilfs_ioctl_trim_fs(struct inode *inode, void __user *argp) 1053f9f32c44SAndreas Rohner { 1054f9f32c44SAndreas Rohner struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1055f9f32c44SAndreas Rohner struct request_queue *q = bdev_get_queue(nilfs->ns_bdev); 1056f9f32c44SAndreas Rohner struct fstrim_range range; 1057f9f32c44SAndreas Rohner int ret; 1058f9f32c44SAndreas Rohner 1059f9f32c44SAndreas Rohner if (!capable(CAP_SYS_ADMIN)) 1060f9f32c44SAndreas Rohner return -EPERM; 1061f9f32c44SAndreas Rohner 1062f9f32c44SAndreas Rohner if (!blk_queue_discard(q)) 1063f9f32c44SAndreas Rohner return -EOPNOTSUPP; 1064f9f32c44SAndreas Rohner 1065f9f32c44SAndreas Rohner if (copy_from_user(&range, argp, sizeof(range))) 1066f9f32c44SAndreas Rohner return -EFAULT; 1067f9f32c44SAndreas Rohner 1068f9f32c44SAndreas Rohner range.minlen = max_t(u64, range.minlen, q->limits.discard_granularity); 1069f9f32c44SAndreas Rohner 1070f9f32c44SAndreas Rohner down_read(&nilfs->ns_segctor_sem); 1071f9f32c44SAndreas Rohner ret = nilfs_sufile_trim_fs(nilfs->ns_sufile, &range); 1072f9f32c44SAndreas Rohner up_read(&nilfs->ns_segctor_sem); 1073f9f32c44SAndreas Rohner 1074f9f32c44SAndreas Rohner if (ret < 0) 1075f9f32c44SAndreas Rohner return ret; 1076f9f32c44SAndreas Rohner 1077f9f32c44SAndreas Rohner if (copy_to_user(argp, &range, sizeof(range))) 1078f9f32c44SAndreas Rohner return -EFAULT; 1079f9f32c44SAndreas Rohner 1080f9f32c44SAndreas Rohner return 0; 1081f9f32c44SAndreas Rohner } 1082f9f32c44SAndreas Rohner 1083f9f32c44SAndreas Rohner /** 1084d623a942SVyacheslav Dubeyko * nilfs_ioctl_set_alloc_range - limit range of segments to be allocated 1085d623a942SVyacheslav Dubeyko * @inode: inode object 1086d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 1087d623a942SVyacheslav Dubeyko * 1088312f79c4SLu Jialin * Description: nilfs_ioctl_set_alloc_range() function defines lower limit 1089d623a942SVyacheslav Dubeyko * of segments in bytes and upper limit of segments in bytes. 1090d623a942SVyacheslav Dubeyko * The NILFS_IOCTL_SET_ALLOC_RANGE is used by nilfs_resize utility. 1091d623a942SVyacheslav Dubeyko * 1092d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned or error code, otherwise. 1093d623a942SVyacheslav Dubeyko */ 1094619205daSRyusuke Konishi static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) 1095619205daSRyusuke Konishi { 1096619205daSRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 1097619205daSRyusuke Konishi __u64 range[2]; 1098619205daSRyusuke Konishi __u64 minseg, maxseg; 1099619205daSRyusuke Konishi unsigned long segbytes; 1100619205daSRyusuke Konishi int ret = -EPERM; 1101619205daSRyusuke Konishi 1102619205daSRyusuke Konishi if (!capable(CAP_SYS_ADMIN)) 1103619205daSRyusuke Konishi goto out; 1104619205daSRyusuke Konishi 1105619205daSRyusuke Konishi ret = -EFAULT; 1106619205daSRyusuke Konishi if (copy_from_user(range, argp, sizeof(__u64[2]))) 1107619205daSRyusuke Konishi goto out; 1108619205daSRyusuke Konishi 1109619205daSRyusuke Konishi ret = -ERANGE; 1110619205daSRyusuke Konishi if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode)) 1111619205daSRyusuke Konishi goto out; 1112619205daSRyusuke Konishi 1113619205daSRyusuke Konishi segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; 1114619205daSRyusuke Konishi 1115619205daSRyusuke Konishi minseg = range[0] + segbytes - 1; 1116619205daSRyusuke Konishi do_div(minseg, segbytes); 1117619205daSRyusuke Konishi maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); 1118619205daSRyusuke Konishi do_div(maxseg, segbytes); 1119619205daSRyusuke Konishi maxseg--; 1120619205daSRyusuke Konishi 1121619205daSRyusuke Konishi ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); 1122619205daSRyusuke Konishi out: 1123619205daSRyusuke Konishi return ret; 1124619205daSRyusuke Konishi } 1125619205daSRyusuke Konishi 1126d623a942SVyacheslav Dubeyko /** 1127d623a942SVyacheslav Dubeyko * nilfs_ioctl_get_info - wrapping function of get metadata info 1128d623a942SVyacheslav Dubeyko * @inode: inode object 1129d623a942SVyacheslav Dubeyko * @filp: file object 1130d623a942SVyacheslav Dubeyko * @cmd: ioctl's request code 1131d623a942SVyacheslav Dubeyko * @argp: pointer on argument from userspace 1132d623a942SVyacheslav Dubeyko * @membsz: size of an item in bytes 1133d623a942SVyacheslav Dubeyko * @dofunc: concrete function of getting metadata info 1134d623a942SVyacheslav Dubeyko * 1135d623a942SVyacheslav Dubeyko * Description: nilfs_ioctl_get_info() gets metadata info by means of 1136d623a942SVyacheslav Dubeyko * calling dofunc() function. 1137d623a942SVyacheslav Dubeyko * 1138d623a942SVyacheslav Dubeyko * Return Value: On success, 0 is returned and requested metadata info 1139d623a942SVyacheslav Dubeyko * is copied into userspace. On error, one of the following 1140d623a942SVyacheslav Dubeyko * negative error codes is returned. 1141d623a942SVyacheslav Dubeyko * 1142d623a942SVyacheslav Dubeyko * %-EINVAL - Invalid arguments from userspace. 1143d623a942SVyacheslav Dubeyko * 1144d623a942SVyacheslav Dubeyko * %-ENOMEM - Insufficient amount of memory available. 1145d623a942SVyacheslav Dubeyko * 1146d623a942SVyacheslav Dubeyko * %-EFAULT - Failure during execution of requested operation. 1147d623a942SVyacheslav Dubeyko */ 114847eb6b9cSRyusuke Konishi static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, 114947eb6b9cSRyusuke Konishi unsigned int cmd, void __user *argp, 115083aca8f4SRyusuke Konishi size_t membsz, 115147eb6b9cSRyusuke Konishi ssize_t (*dofunc)(struct the_nilfs *, 115247eb6b9cSRyusuke Konishi __u64 *, int, 115347eb6b9cSRyusuke Konishi void *, size_t, size_t)) 115447eb6b9cSRyusuke Konishi 115547eb6b9cSRyusuke Konishi { 1156e3154e97SRyusuke Konishi struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 115747eb6b9cSRyusuke Konishi struct nilfs_argv argv; 115847eb6b9cSRyusuke Konishi int ret; 115947eb6b9cSRyusuke Konishi 116047eb6b9cSRyusuke Konishi if (copy_from_user(&argv, argp, sizeof(argv))) 116147eb6b9cSRyusuke Konishi return -EFAULT; 116247eb6b9cSRyusuke Konishi 1163003ff182SRyusuke Konishi if (argv.v_size < membsz) 116483aca8f4SRyusuke Konishi return -EINVAL; 116583aca8f4SRyusuke Konishi 116647eb6b9cSRyusuke Konishi ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); 116747eb6b9cSRyusuke Konishi if (ret < 0) 116847eb6b9cSRyusuke Konishi return ret; 116947eb6b9cSRyusuke Konishi 117047eb6b9cSRyusuke Konishi if (copy_to_user(argp, &argv, sizeof(argv))) 117147eb6b9cSRyusuke Konishi ret = -EFAULT; 117247eb6b9cSRyusuke Konishi return ret; 117347eb6b9cSRyusuke Konishi } 117447eb6b9cSRyusuke Konishi 11752cc88f3aSAndreas Rohner /** 11762cc88f3aSAndreas Rohner * nilfs_ioctl_set_suinfo - set segment usage info 11772cc88f3aSAndreas Rohner * @inode: inode object 11782cc88f3aSAndreas Rohner * @filp: file object 11792cc88f3aSAndreas Rohner * @cmd: ioctl's request code 11802cc88f3aSAndreas Rohner * @argp: pointer on argument from userspace 11812cc88f3aSAndreas Rohner * 11822cc88f3aSAndreas Rohner * Description: Expects an array of nilfs_suinfo_update structures 11832cc88f3aSAndreas Rohner * encapsulated in nilfs_argv and updates the segment usage info 11842cc88f3aSAndreas Rohner * according to the flags in nilfs_suinfo_update. 11852cc88f3aSAndreas Rohner * 11862cc88f3aSAndreas Rohner * Return Value: On success, 0 is returned. On error, one of the 11872cc88f3aSAndreas Rohner * following negative error codes is returned. 11882cc88f3aSAndreas Rohner * 11892cc88f3aSAndreas Rohner * %-EPERM - Not enough permissions 11902cc88f3aSAndreas Rohner * 11912cc88f3aSAndreas Rohner * %-EFAULT - Error copying input data 11922cc88f3aSAndreas Rohner * 11932cc88f3aSAndreas Rohner * %-EIO - I/O error. 11942cc88f3aSAndreas Rohner * 11952cc88f3aSAndreas Rohner * %-ENOMEM - Insufficient amount of memory available. 11962cc88f3aSAndreas Rohner * 11972cc88f3aSAndreas Rohner * %-EINVAL - Invalid values in input (segment number, flags or nblocks) 11982cc88f3aSAndreas Rohner */ 11992cc88f3aSAndreas Rohner static int nilfs_ioctl_set_suinfo(struct inode *inode, struct file *filp, 12002cc88f3aSAndreas Rohner unsigned int cmd, void __user *argp) 12012cc88f3aSAndreas Rohner { 12022cc88f3aSAndreas Rohner struct the_nilfs *nilfs = inode->i_sb->s_fs_info; 12032cc88f3aSAndreas Rohner struct nilfs_transaction_info ti; 12042cc88f3aSAndreas Rohner struct nilfs_argv argv; 12052cc88f3aSAndreas Rohner size_t len; 12062cc88f3aSAndreas Rohner void __user *base; 12072cc88f3aSAndreas Rohner void *kbuf; 12082cc88f3aSAndreas Rohner int ret; 12092cc88f3aSAndreas Rohner 12102cc88f3aSAndreas Rohner if (!capable(CAP_SYS_ADMIN)) 12112cc88f3aSAndreas Rohner return -EPERM; 12122cc88f3aSAndreas Rohner 12132cc88f3aSAndreas Rohner ret = mnt_want_write_file(filp); 12142cc88f3aSAndreas Rohner if (ret) 12152cc88f3aSAndreas Rohner return ret; 12162cc88f3aSAndreas Rohner 12172cc88f3aSAndreas Rohner ret = -EFAULT; 12182cc88f3aSAndreas Rohner if (copy_from_user(&argv, argp, sizeof(argv))) 12192cc88f3aSAndreas Rohner goto out; 12202cc88f3aSAndreas Rohner 12212cc88f3aSAndreas Rohner ret = -EINVAL; 12222cc88f3aSAndreas Rohner if (argv.v_size < sizeof(struct nilfs_suinfo_update)) 12232cc88f3aSAndreas Rohner goto out; 12242cc88f3aSAndreas Rohner 12252cc88f3aSAndreas Rohner if (argv.v_nmembs > nilfs->ns_nsegments) 12262cc88f3aSAndreas Rohner goto out; 12272cc88f3aSAndreas Rohner 12282cc88f3aSAndreas Rohner if (argv.v_nmembs >= UINT_MAX / argv.v_size) 12292cc88f3aSAndreas Rohner goto out; 12302cc88f3aSAndreas Rohner 12312cc88f3aSAndreas Rohner len = argv.v_size * argv.v_nmembs; 12322cc88f3aSAndreas Rohner if (!len) { 12332cc88f3aSAndreas Rohner ret = 0; 12342cc88f3aSAndreas Rohner goto out; 12352cc88f3aSAndreas Rohner } 12362cc88f3aSAndreas Rohner 12372cc88f3aSAndreas Rohner base = (void __user *)(unsigned long)argv.v_base; 12382cc88f3aSAndreas Rohner kbuf = vmalloc(len); 12392cc88f3aSAndreas Rohner if (!kbuf) { 12402cc88f3aSAndreas Rohner ret = -ENOMEM; 12412cc88f3aSAndreas Rohner goto out; 12422cc88f3aSAndreas Rohner } 12432cc88f3aSAndreas Rohner 12442cc88f3aSAndreas Rohner if (copy_from_user(kbuf, base, len)) { 12452cc88f3aSAndreas Rohner ret = -EFAULT; 12462cc88f3aSAndreas Rohner goto out_free; 12472cc88f3aSAndreas Rohner } 12482cc88f3aSAndreas Rohner 12492cc88f3aSAndreas Rohner nilfs_transaction_begin(inode->i_sb, &ti, 0); 12502cc88f3aSAndreas Rohner ret = nilfs_sufile_set_suinfo(nilfs->ns_sufile, kbuf, argv.v_size, 12512cc88f3aSAndreas Rohner argv.v_nmembs); 12522cc88f3aSAndreas Rohner if (unlikely(ret < 0)) 12532cc88f3aSAndreas Rohner nilfs_transaction_abort(inode->i_sb); 12542cc88f3aSAndreas Rohner else 12552cc88f3aSAndreas Rohner nilfs_transaction_commit(inode->i_sb); /* never fails */ 12562cc88f3aSAndreas Rohner 12572cc88f3aSAndreas Rohner out_free: 12582cc88f3aSAndreas Rohner vfree(kbuf); 12592cc88f3aSAndreas Rohner out: 12602cc88f3aSAndreas Rohner mnt_drop_write_file(filp); 12612cc88f3aSAndreas Rohner return ret; 12622cc88f3aSAndreas Rohner } 12632cc88f3aSAndreas Rohner 12647a946193SRyusuke Konishi long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 12657942b919SKoji Sato { 1266496ad9aaSAl Viro struct inode *inode = file_inode(filp); 126775323400SLi Hong void __user *argp = (void __user *)arg; 12687942b919SKoji Sato 12697942b919SKoji Sato switch (cmd) { 1270cde98f0fSRyusuke Konishi case FS_IOC_GETVERSION: 1271cde98f0fSRyusuke Konishi return nilfs_ioctl_getversion(inode, argp); 12727942b919SKoji Sato case NILFS_IOCTL_CHANGE_CPMODE: 12737942b919SKoji Sato return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); 12747942b919SKoji Sato case NILFS_IOCTL_DELETE_CHECKPOINT: 12757942b919SKoji Sato return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); 12767942b919SKoji Sato case NILFS_IOCTL_GET_CPINFO: 127747eb6b9cSRyusuke Konishi return nilfs_ioctl_get_info(inode, filp, cmd, argp, 127883aca8f4SRyusuke Konishi sizeof(struct nilfs_cpinfo), 127947eb6b9cSRyusuke Konishi nilfs_ioctl_do_get_cpinfo); 12807942b919SKoji Sato case NILFS_IOCTL_GET_CPSTAT: 12817942b919SKoji Sato return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); 12827942b919SKoji Sato case NILFS_IOCTL_GET_SUINFO: 128347eb6b9cSRyusuke Konishi return nilfs_ioctl_get_info(inode, filp, cmd, argp, 128483aca8f4SRyusuke Konishi sizeof(struct nilfs_suinfo), 128547eb6b9cSRyusuke Konishi nilfs_ioctl_do_get_suinfo); 12862cc88f3aSAndreas Rohner case NILFS_IOCTL_SET_SUINFO: 12872cc88f3aSAndreas Rohner return nilfs_ioctl_set_suinfo(inode, filp, cmd, argp); 12887942b919SKoji Sato case NILFS_IOCTL_GET_SUSTAT: 12897942b919SKoji Sato return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); 12907942b919SKoji Sato case NILFS_IOCTL_GET_VINFO: 129147eb6b9cSRyusuke Konishi return nilfs_ioctl_get_info(inode, filp, cmd, argp, 129283aca8f4SRyusuke Konishi sizeof(struct nilfs_vinfo), 129347eb6b9cSRyusuke Konishi nilfs_ioctl_do_get_vinfo); 12947942b919SKoji Sato case NILFS_IOCTL_GET_BDESCS: 12957942b919SKoji Sato return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); 12967942b919SKoji Sato case NILFS_IOCTL_CLEAN_SEGMENTS: 12977942b919SKoji Sato return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); 12987942b919SKoji Sato case NILFS_IOCTL_SYNC: 12997942b919SKoji Sato return nilfs_ioctl_sync(inode, filp, cmd, argp); 13004e33f9eaSRyusuke Konishi case NILFS_IOCTL_RESIZE: 13014e33f9eaSRyusuke Konishi return nilfs_ioctl_resize(inode, filp, argp); 1302619205daSRyusuke Konishi case NILFS_IOCTL_SET_ALLOC_RANGE: 1303619205daSRyusuke Konishi return nilfs_ioctl_set_alloc_range(inode, argp); 1304f9f32c44SAndreas Rohner case FITRIM: 1305f9f32c44SAndreas Rohner return nilfs_ioctl_trim_fs(inode, argp); 13067942b919SKoji Sato default: 13077942b919SKoji Sato return -ENOTTY; 13087942b919SKoji Sato } 13097942b919SKoji Sato } 1310828b1c50SRyusuke Konishi 1311828b1c50SRyusuke Konishi #ifdef CONFIG_COMPAT 1312828b1c50SRyusuke Konishi long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) 1313828b1c50SRyusuke Konishi { 1314828b1c50SRyusuke Konishi switch (cmd) { 1315828b1c50SRyusuke Konishi case FS_IOC32_GETVERSION: 1316828b1c50SRyusuke Konishi cmd = FS_IOC_GETVERSION; 1317828b1c50SRyusuke Konishi break; 1318695c60f2SThomas Meyer case NILFS_IOCTL_CHANGE_CPMODE: 1319695c60f2SThomas Meyer case NILFS_IOCTL_DELETE_CHECKPOINT: 1320695c60f2SThomas Meyer case NILFS_IOCTL_GET_CPINFO: 1321695c60f2SThomas Meyer case NILFS_IOCTL_GET_CPSTAT: 1322695c60f2SThomas Meyer case NILFS_IOCTL_GET_SUINFO: 13232cc88f3aSAndreas Rohner case NILFS_IOCTL_SET_SUINFO: 1324695c60f2SThomas Meyer case NILFS_IOCTL_GET_SUSTAT: 1325695c60f2SThomas Meyer case NILFS_IOCTL_GET_VINFO: 1326695c60f2SThomas Meyer case NILFS_IOCTL_GET_BDESCS: 1327695c60f2SThomas Meyer case NILFS_IOCTL_CLEAN_SEGMENTS: 1328695c60f2SThomas Meyer case NILFS_IOCTL_SYNC: 1329695c60f2SThomas Meyer case NILFS_IOCTL_RESIZE: 1330695c60f2SThomas Meyer case NILFS_IOCTL_SET_ALLOC_RANGE: 1331314999dcSArnd Bergmann case FITRIM: 1332695c60f2SThomas Meyer break; 1333828b1c50SRyusuke Konishi default: 1334828b1c50SRyusuke Konishi return -ENOIOCTLCMD; 1335828b1c50SRyusuke Konishi } 1336828b1c50SRyusuke Konishi return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); 1337828b1c50SRyusuke Konishi } 1338828b1c50SRyusuke Konishi #endif 1339