Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 1 | /* |
| 2 | * ioctl.c - NILFS ioctl operations. |
| 3 | * |
| 4 | * Copyright (C) 2007, 2008 Nippon Telegraph and Telephone Corporation. |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 19 | * |
| 20 | * Written by Koji Sato <koji@osrg.net>. |
| 21 | */ |
| 22 | |
| 23 | #include <linux/fs.h> |
| 24 | #include <linux/wait.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 25 | #include <linux/slab.h> |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 26 | #include <linux/capability.h> /* capable() */ |
| 27 | #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 28 | #include <linux/vmalloc.h> |
Ryusuke Konishi | 828b1c5 | 2011-02-03 21:26:17 +0900 | [diff] [blame] | 29 | #include <linux/compat.h> /* compat_ptr() */ |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 30 | #include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */ |
Ryusuke Konishi | ae19183 | 2011-02-04 01:19:38 +0900 | [diff] [blame] | 31 | #include <linux/buffer_head.h> |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 32 | #include <linux/nilfs2_fs.h> |
| 33 | #include "nilfs.h" |
| 34 | #include "segment.h" |
| 35 | #include "bmap.h" |
| 36 | #include "cpfile.h" |
| 37 | #include "sufile.h" |
| 38 | #include "dat.h" |
| 39 | |
| 40 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 41 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, |
| 42 | struct nilfs_argv *argv, int dir, |
| 43 | ssize_t (*dofunc)(struct the_nilfs *, |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 44 | __u64 *, int, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 45 | void *, size_t, size_t)) |
| 46 | { |
| 47 | void *buf; |
Ryusuke Konishi | dc498d0 | 2009-04-06 19:01:52 -0700 | [diff] [blame] | 48 | void __user *base = (void __user *)(unsigned long)argv->v_base; |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 49 | size_t maxmembs, total, n; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 50 | ssize_t nr; |
| 51 | int ret, i; |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 52 | __u64 pos, ppos; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 53 | |
| 54 | if (argv->v_nmembs == 0) |
| 55 | return 0; |
| 56 | |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 57 | if (argv->v_size > PAGE_SIZE) |
| 58 | return -EINVAL; |
| 59 | |
| 60 | buf = (void *)__get_free_pages(GFP_NOFS, 0); |
| 61 | if (unlikely(!buf)) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 62 | return -ENOMEM; |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 63 | maxmembs = PAGE_SIZE / argv->v_size; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 64 | |
| 65 | ret = 0; |
| 66 | total = 0; |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 67 | pos = argv->v_index; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 68 | for (i = 0; i < argv->v_nmembs; i += n) { |
| 69 | n = (argv->v_nmembs - i < maxmembs) ? |
| 70 | argv->v_nmembs - i : maxmembs; |
| 71 | if ((dir & _IOC_WRITE) && |
Ryusuke Konishi | dc498d0 | 2009-04-06 19:01:52 -0700 | [diff] [blame] | 72 | copy_from_user(buf, base + argv->v_size * i, |
| 73 | argv->v_size * n)) { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 74 | ret = -EFAULT; |
| 75 | break; |
| 76 | } |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 77 | ppos = pos; |
Pekka Enberg | 8acfbf0 | 2009-04-06 19:01:49 -0700 | [diff] [blame] | 78 | nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 79 | n); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 80 | if (nr < 0) { |
| 81 | ret = nr; |
| 82 | break; |
| 83 | } |
| 84 | if ((dir & _IOC_READ) && |
Ryusuke Konishi | dc498d0 | 2009-04-06 19:01:52 -0700 | [diff] [blame] | 85 | copy_to_user(base + argv->v_size * i, buf, |
| 86 | argv->v_size * nr)) { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 87 | ret = -EFAULT; |
| 88 | break; |
| 89 | } |
| 90 | total += nr; |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 91 | if ((size_t)nr < n) |
| 92 | break; |
| 93 | if (pos == ppos) |
| 94 | pos += n; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 95 | } |
| 96 | argv->v_nmembs = total; |
| 97 | |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 98 | free_pages((unsigned long)buf, 0); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 99 | return ret; |
| 100 | } |
| 101 | |
Ryusuke Konishi | cde98f0 | 2011-01-20 02:09:53 +0900 | [diff] [blame] | 102 | static int nilfs_ioctl_getflags(struct inode *inode, void __user *argp) |
| 103 | { |
| 104 | unsigned int flags = NILFS_I(inode)->i_flags & FS_FL_USER_VISIBLE; |
| 105 | |
| 106 | return put_user(flags, (int __user *)argp); |
| 107 | } |
| 108 | |
| 109 | static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp, |
| 110 | void __user *argp) |
| 111 | { |
| 112 | struct nilfs_transaction_info ti; |
| 113 | unsigned int flags, oldflags; |
| 114 | int ret; |
| 115 | |
Serge E. Hallyn | 2e14967 | 2011-03-23 16:43:26 -0700 | [diff] [blame] | 116 | if (!inode_owner_or_capable(inode)) |
Ryusuke Konishi | cde98f0 | 2011-01-20 02:09:53 +0900 | [diff] [blame] | 117 | return -EACCES; |
| 118 | |
| 119 | if (get_user(flags, (int __user *)argp)) |
| 120 | return -EFAULT; |
| 121 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 122 | ret = mnt_want_write_file(filp); |
Ryusuke Konishi | cde98f0 | 2011-01-20 02:09:53 +0900 | [diff] [blame] | 123 | if (ret) |
| 124 | return ret; |
| 125 | |
| 126 | flags = nilfs_mask_flags(inode->i_mode, flags); |
| 127 | |
| 128 | mutex_lock(&inode->i_mutex); |
| 129 | |
| 130 | oldflags = NILFS_I(inode)->i_flags; |
| 131 | |
| 132 | /* |
| 133 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by the |
| 134 | * relevant capability. |
| 135 | */ |
| 136 | ret = -EPERM; |
| 137 | if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) && |
| 138 | !capable(CAP_LINUX_IMMUTABLE)) |
| 139 | goto out; |
| 140 | |
| 141 | ret = nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 142 | if (ret) |
| 143 | goto out; |
| 144 | |
| 145 | NILFS_I(inode)->i_flags = (oldflags & ~FS_FL_USER_MODIFIABLE) | |
| 146 | (flags & FS_FL_USER_MODIFIABLE); |
| 147 | |
| 148 | nilfs_set_inode_flags(inode); |
| 149 | inode->i_ctime = CURRENT_TIME; |
| 150 | if (IS_SYNC(inode)) |
| 151 | nilfs_set_transaction_flag(NILFS_TI_SYNC); |
| 152 | |
| 153 | nilfs_mark_inode_dirty(inode); |
| 154 | ret = nilfs_transaction_commit(inode->i_sb); |
| 155 | out: |
| 156 | mutex_unlock(&inode->i_mutex); |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 157 | mnt_drop_write_file(filp); |
Ryusuke Konishi | cde98f0 | 2011-01-20 02:09:53 +0900 | [diff] [blame] | 158 | return ret; |
| 159 | } |
| 160 | |
| 161 | static int nilfs_ioctl_getversion(struct inode *inode, void __user *argp) |
| 162 | { |
| 163 | return put_user(inode->i_generation, (int __user *)argp); |
| 164 | } |
| 165 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 166 | static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, |
| 167 | unsigned int cmd, void __user *argp) |
| 168 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 169 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 170 | struct nilfs_transaction_info ti; |
| 171 | struct nilfs_cpmode cpmode; |
| 172 | int ret; |
| 173 | |
| 174 | if (!capable(CAP_SYS_ADMIN)) |
| 175 | return -EPERM; |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 176 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 177 | ret = mnt_want_write_file(filp); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 178 | if (ret) |
| 179 | return ret; |
| 180 | |
| 181 | ret = -EFAULT; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 182 | if (copy_from_user(&cpmode, argp, sizeof(cpmode))) |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 183 | goto out; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 184 | |
Ryusuke Konishi | 348fe8d | 2010-09-09 02:07:56 +0900 | [diff] [blame] | 185 | down_read(&inode->i_sb->s_umount); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 186 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 187 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 188 | ret = nilfs_cpfile_change_cpmode( |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 189 | nilfs->ns_cpfile, cpmode.cm_cno, cpmode.cm_mode); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 190 | if (unlikely(ret < 0)) |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 191 | nilfs_transaction_abort(inode->i_sb); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 192 | else |
| 193 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
| 194 | |
Ryusuke Konishi | 348fe8d | 2010-09-09 02:07:56 +0900 | [diff] [blame] | 195 | up_read(&inode->i_sb->s_umount); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 196 | out: |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 197 | mnt_drop_write_file(filp); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 198 | return ret; |
| 199 | } |
| 200 | |
| 201 | static int |
| 202 | nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, |
| 203 | unsigned int cmd, void __user *argp) |
| 204 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 205 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 206 | struct nilfs_transaction_info ti; |
| 207 | __u64 cno; |
| 208 | int ret; |
| 209 | |
| 210 | if (!capable(CAP_SYS_ADMIN)) |
| 211 | return -EPERM; |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 212 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 213 | ret = mnt_want_write_file(filp); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 214 | if (ret) |
| 215 | return ret; |
| 216 | |
| 217 | ret = -EFAULT; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 218 | if (copy_from_user(&cno, argp, sizeof(cno))) |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 219 | goto out; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 220 | |
| 221 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 222 | ret = nilfs_cpfile_delete_checkpoint(nilfs->ns_cpfile, cno); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 223 | if (unlikely(ret < 0)) |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 224 | nilfs_transaction_abort(inode->i_sb); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 225 | else |
| 226 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
| 227 | out: |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 228 | mnt_drop_write_file(filp); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 229 | return ret; |
| 230 | } |
| 231 | |
| 232 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 233 | nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 234 | void *buf, size_t size, size_t nmembs) |
| 235 | { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 236 | int ret; |
| 237 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 238 | down_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 239 | ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, |
Ryusuke Konishi | 003ff18 | 2009-05-12 03:58:47 +0900 | [diff] [blame] | 240 | size, nmembs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 241 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 242 | return ret; |
| 243 | } |
| 244 | |
| 245 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, |
| 246 | unsigned int cmd, void __user *argp) |
| 247 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 248 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 249 | struct nilfs_cpstat cpstat; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 250 | int ret; |
| 251 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 252 | down_read(&nilfs->ns_segctor_sem); |
| 253 | ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); |
| 254 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 255 | if (ret < 0) |
| 256 | return ret; |
| 257 | |
| 258 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) |
| 259 | ret = -EFAULT; |
| 260 | return ret; |
| 261 | } |
| 262 | |
| 263 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 264 | nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 265 | void *buf, size_t size, size_t nmembs) |
| 266 | { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 267 | int ret; |
| 268 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 269 | down_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 003ff18 | 2009-05-12 03:58:47 +0900 | [diff] [blame] | 270 | ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, size, |
| 271 | nmembs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 272 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 273 | return ret; |
| 274 | } |
| 275 | |
| 276 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, |
| 277 | unsigned int cmd, void __user *argp) |
| 278 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 279 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 280 | struct nilfs_sustat sustat; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 281 | int ret; |
| 282 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 283 | down_read(&nilfs->ns_segctor_sem); |
| 284 | ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); |
| 285 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 286 | if (ret < 0) |
| 287 | return ret; |
| 288 | |
| 289 | if (copy_to_user(argp, &sustat, sizeof(sustat))) |
| 290 | ret = -EFAULT; |
| 291 | return ret; |
| 292 | } |
| 293 | |
| 294 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 295 | nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, __u64 *posp, int flags, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 296 | void *buf, size_t size, size_t nmembs) |
| 297 | { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 298 | int ret; |
| 299 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 300 | down_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 301 | ret = nilfs_dat_get_vinfo(nilfs->ns_dat, buf, size, nmembs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 302 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 303 | return ret; |
| 304 | } |
| 305 | |
| 306 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 307 | nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 308 | void *buf, size_t size, size_t nmembs) |
| 309 | { |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 310 | struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 311 | struct nilfs_bdesc *bdescs = buf; |
| 312 | int ret, i; |
| 313 | |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 314 | down_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 315 | for (i = 0; i < nmembs; i++) { |
| 316 | ret = nilfs_bmap_lookup_at_level(bmap, |
| 317 | bdescs[i].bd_offset, |
| 318 | bdescs[i].bd_level + 1, |
| 319 | &bdescs[i].bd_blocknr); |
| 320 | if (ret < 0) { |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 321 | if (ret != -ENOENT) { |
| 322 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 323 | return ret; |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 324 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 325 | bdescs[i].bd_blocknr = 0; |
| 326 | } |
| 327 | } |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 328 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 329 | return nmembs; |
| 330 | } |
| 331 | |
| 332 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, |
| 333 | unsigned int cmd, void __user *argp) |
| 334 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 335 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 336 | struct nilfs_argv argv; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 337 | int ret; |
| 338 | |
| 339 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 340 | return -EFAULT; |
| 341 | |
Ryusuke Konishi | 83aca8f | 2009-05-11 23:24:47 +0900 | [diff] [blame] | 342 | if (argv.v_size != sizeof(struct nilfs_bdesc)) |
| 343 | return -EINVAL; |
| 344 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 345 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
| 346 | nilfs_ioctl_do_get_bdescs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 347 | if (ret < 0) |
| 348 | return ret; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 349 | |
| 350 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 351 | ret = -EFAULT; |
| 352 | return ret; |
| 353 | } |
| 354 | |
| 355 | static int nilfs_ioctl_move_inode_block(struct inode *inode, |
| 356 | struct nilfs_vdesc *vdesc, |
| 357 | struct list_head *buffers) |
| 358 | { |
| 359 | struct buffer_head *bh; |
| 360 | int ret; |
| 361 | |
| 362 | if (vdesc->vd_flags == 0) |
| 363 | ret = nilfs_gccache_submit_read_data( |
| 364 | inode, vdesc->vd_offset, vdesc->vd_blocknr, |
| 365 | vdesc->vd_vblocknr, &bh); |
| 366 | else |
| 367 | ret = nilfs_gccache_submit_read_node( |
| 368 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); |
| 369 | |
| 370 | if (unlikely(ret < 0)) { |
| 371 | if (ret == -ENOENT) |
| 372 | printk(KERN_CRIT |
| 373 | "%s: invalid virtual block address (%s): " |
| 374 | "ino=%llu, cno=%llu, offset=%llu, " |
| 375 | "blocknr=%llu, vblocknr=%llu\n", |
| 376 | __func__, vdesc->vd_flags ? "node" : "data", |
| 377 | (unsigned long long)vdesc->vd_ino, |
| 378 | (unsigned long long)vdesc->vd_cno, |
| 379 | (unsigned long long)vdesc->vd_offset, |
| 380 | (unsigned long long)vdesc->vd_blocknr, |
| 381 | (unsigned long long)vdesc->vd_vblocknr); |
| 382 | return ret; |
| 383 | } |
Ryusuke Konishi | 5399dd1 | 2009-11-07 18:45:16 +0900 | [diff] [blame] | 384 | if (unlikely(!list_empty(&bh->b_assoc_buffers))) { |
| 385 | printk(KERN_CRIT "%s: conflicting %s buffer: ino=%llu, " |
| 386 | "cno=%llu, offset=%llu, blocknr=%llu, vblocknr=%llu\n", |
| 387 | __func__, vdesc->vd_flags ? "node" : "data", |
| 388 | (unsigned long long)vdesc->vd_ino, |
| 389 | (unsigned long long)vdesc->vd_cno, |
| 390 | (unsigned long long)vdesc->vd_offset, |
| 391 | (unsigned long long)vdesc->vd_blocknr, |
| 392 | (unsigned long long)vdesc->vd_vblocknr); |
| 393 | brelse(bh); |
| 394 | return -EEXIST; |
| 395 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 396 | list_add_tail(&bh->b_assoc_buffers, buffers); |
| 397 | return 0; |
| 398 | } |
| 399 | |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 400 | static int nilfs_ioctl_move_blocks(struct super_block *sb, |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 401 | struct nilfs_argv *argv, void *buf) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 402 | { |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 403 | size_t nmembs = argv->v_nmembs; |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 404 | struct the_nilfs *nilfs = sb->s_fs_info; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 405 | struct inode *inode; |
| 406 | struct nilfs_vdesc *vdesc; |
| 407 | struct buffer_head *bh, *n; |
| 408 | LIST_HEAD(buffers); |
| 409 | ino_t ino; |
| 410 | __u64 cno; |
| 411 | int i, ret; |
| 412 | |
| 413 | for (i = 0, vdesc = buf; i < nmembs; ) { |
| 414 | ino = vdesc->vd_ino; |
| 415 | cno = vdesc->vd_cno; |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 416 | inode = nilfs_iget_for_gc(sb, ino, cno); |
Dan Carpenter | 103cfcf | 2010-11-23 09:26:02 +0300 | [diff] [blame] | 417 | if (IS_ERR(inode)) { |
| 418 | ret = PTR_ERR(inode); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 419 | goto failed; |
| 420 | } |
Ryusuke Konishi | 947b10a | 2010-12-16 09:57:57 +0900 | [diff] [blame] | 421 | if (list_empty(&NILFS_I(inode)->i_dirty)) { |
| 422 | /* |
| 423 | * Add the inode to GC inode list. Garbage Collection |
| 424 | * is serialized and no two processes manipulate the |
| 425 | * list simultaneously. |
| 426 | */ |
| 427 | igrab(inode); |
| 428 | list_add(&NILFS_I(inode)->i_dirty, |
| 429 | &nilfs->ns_gc_inodes); |
| 430 | } |
| 431 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 432 | do { |
| 433 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, |
| 434 | &buffers); |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 435 | if (unlikely(ret < 0)) { |
| 436 | iput(inode); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 437 | goto failed; |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 438 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 439 | vdesc++; |
| 440 | } while (++i < nmembs && |
| 441 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 442 | |
| 443 | iput(inode); /* The inode still remains in GC inode list */ |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 444 | } |
| 445 | |
| 446 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { |
| 447 | ret = nilfs_gccache_wait_and_mark_dirty(bh); |
| 448 | if (unlikely(ret < 0)) { |
Ryusuke Konishi | 5399dd1 | 2009-11-07 18:45:16 +0900 | [diff] [blame] | 449 | WARN_ON(ret == -EEXIST); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 450 | goto failed; |
| 451 | } |
| 452 | list_del_init(&bh->b_assoc_buffers); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 453 | brelse(bh); |
| 454 | } |
| 455 | return nmembs; |
| 456 | |
| 457 | failed: |
| 458 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { |
| 459 | list_del_init(&bh->b_assoc_buffers); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 460 | brelse(bh); |
| 461 | } |
| 462 | return ret; |
| 463 | } |
| 464 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 465 | static int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, |
| 466 | struct nilfs_argv *argv, void *buf) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 467 | { |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 468 | size_t nmembs = argv->v_nmembs; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 469 | struct inode *cpfile = nilfs->ns_cpfile; |
| 470 | struct nilfs_period *periods = buf; |
| 471 | int ret, i; |
| 472 | |
| 473 | for (i = 0; i < nmembs; i++) { |
| 474 | ret = nilfs_cpfile_delete_checkpoints( |
| 475 | cpfile, periods[i].p_start, periods[i].p_end); |
| 476 | if (ret < 0) |
| 477 | return ret; |
| 478 | } |
| 479 | return nmembs; |
| 480 | } |
| 481 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 482 | static int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, |
| 483 | struct nilfs_argv *argv, void *buf) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 484 | { |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 485 | size_t nmembs = argv->v_nmembs; |
| 486 | int ret; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 487 | |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 488 | ret = nilfs_dat_freev(nilfs->ns_dat, buf, nmembs); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 489 | |
| 490 | return (ret < 0) ? ret : nmembs; |
| 491 | } |
| 492 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 493 | static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, |
| 494 | struct nilfs_argv *argv, void *buf) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 495 | { |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 496 | size_t nmembs = argv->v_nmembs; |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 497 | struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 498 | struct nilfs_bdesc *bdescs = buf; |
| 499 | int ret, i; |
| 500 | |
| 501 | for (i = 0; i < nmembs; i++) { |
| 502 | /* XXX: use macro or inline func to check liveness */ |
| 503 | ret = nilfs_bmap_lookup_at_level(bmap, |
| 504 | bdescs[i].bd_offset, |
| 505 | bdescs[i].bd_level + 1, |
| 506 | &bdescs[i].bd_blocknr); |
| 507 | if (ret < 0) { |
| 508 | if (ret != -ENOENT) |
| 509 | return ret; |
| 510 | bdescs[i].bd_blocknr = 0; |
| 511 | } |
| 512 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) |
| 513 | /* skip dead block */ |
| 514 | continue; |
| 515 | if (bdescs[i].bd_level == 0) { |
Ryusuke Konishi | 365e215 | 2010-12-27 00:07:30 +0900 | [diff] [blame] | 516 | ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 517 | bdescs[i].bd_offset); |
| 518 | if (ret < 0) { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 519 | WARN_ON(ret == -ENOENT); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 520 | return ret; |
| 521 | } |
| 522 | } else { |
| 523 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, |
| 524 | bdescs[i].bd_level); |
| 525 | if (ret < 0) { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 526 | WARN_ON(ret == -ENOENT); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 527 | return ret; |
| 528 | } |
| 529 | } |
| 530 | } |
| 531 | return nmembs; |
| 532 | } |
| 533 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 534 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 535 | struct nilfs_argv *argv, void **kbufs) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 536 | { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 537 | const char *msg; |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 538 | int ret; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 539 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 540 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], kbufs[1]); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 541 | if (ret < 0) { |
| 542 | /* |
| 543 | * can safely abort because checkpoints can be removed |
| 544 | * independently. |
| 545 | */ |
| 546 | msg = "cannot delete checkpoints"; |
| 547 | goto failed; |
| 548 | } |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 549 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], kbufs[2]); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 550 | if (ret < 0) { |
| 551 | /* |
| 552 | * can safely abort because DAT file is updated atomically |
| 553 | * using a copy-on-write technique. |
| 554 | */ |
| 555 | msg = "cannot delete virtual blocks from DAT file"; |
| 556 | goto failed; |
| 557 | } |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 558 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], kbufs[3]); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 559 | if (ret < 0) { |
| 560 | /* |
| 561 | * can safely abort because the operation is nondestructive. |
| 562 | */ |
| 563 | msg = "cannot mark copying blocks dirty"; |
| 564 | goto failed; |
| 565 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 566 | return 0; |
| 567 | |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 568 | failed: |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 569 | printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n", |
| 570 | msg, ret); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 571 | return ret; |
| 572 | } |
| 573 | |
| 574 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, |
| 575 | unsigned int cmd, void __user *argp) |
| 576 | { |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 577 | struct nilfs_argv argv[5]; |
Tobias Klauser | 33e189b | 2009-12-23 13:57:47 +0100 | [diff] [blame] | 578 | static const size_t argsz[5] = { |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 579 | sizeof(struct nilfs_vdesc), |
| 580 | sizeof(struct nilfs_period), |
| 581 | sizeof(__u64), |
| 582 | sizeof(struct nilfs_bdesc), |
| 583 | sizeof(__u64), |
| 584 | }; |
| 585 | void __user *base; |
| 586 | void *kbufs[5]; |
| 587 | struct the_nilfs *nilfs; |
| 588 | size_t len, nsegs; |
| 589 | int n, ret; |
| 590 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 591 | if (!capable(CAP_SYS_ADMIN)) |
| 592 | return -EPERM; |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 593 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 594 | ret = mnt_want_write_file(filp); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 595 | if (ret) |
| 596 | return ret; |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 597 | |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 598 | ret = -EFAULT; |
| 599 | if (copy_from_user(argv, argp, sizeof(argv))) |
| 600 | goto out; |
| 601 | |
| 602 | ret = -EINVAL; |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 603 | nsegs = argv[4].v_nmembs; |
| 604 | if (argv[4].v_size != argsz[4]) |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 605 | goto out; |
Xi Wang | 1ecd3c7 | 2012-02-08 17:13:37 -0800 | [diff] [blame] | 606 | if (nsegs > UINT_MAX / sizeof(__u64)) |
| 607 | goto out; |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 608 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 609 | /* |
| 610 | * argv[4] points to segment numbers this ioctl cleans. We |
| 611 | * use kmalloc() for its buffer because memory used for the |
| 612 | * segment numbers is enough small. |
| 613 | */ |
| 614 | kbufs[4] = memdup_user((void __user *)(unsigned long)argv[4].v_base, |
| 615 | nsegs * sizeof(__u64)); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 616 | if (IS_ERR(kbufs[4])) { |
| 617 | ret = PTR_ERR(kbufs[4]); |
| 618 | goto out; |
| 619 | } |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 620 | nilfs = inode->i_sb->s_fs_info; |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 621 | |
| 622 | for (n = 0; n < 4; n++) { |
| 623 | ret = -EINVAL; |
| 624 | if (argv[n].v_size != argsz[n]) |
| 625 | goto out_free; |
| 626 | |
| 627 | if (argv[n].v_nmembs > nsegs * nilfs->ns_blocks_per_segment) |
| 628 | goto out_free; |
| 629 | |
Haogang Chen | 481fe17 | 2011-12-19 17:11:56 -0800 | [diff] [blame] | 630 | if (argv[n].v_nmembs >= UINT_MAX / argv[n].v_size) |
| 631 | goto out_free; |
| 632 | |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 633 | len = argv[n].v_size * argv[n].v_nmembs; |
| 634 | base = (void __user *)(unsigned long)argv[n].v_base; |
| 635 | if (len == 0) { |
| 636 | kbufs[n] = NULL; |
| 637 | continue; |
| 638 | } |
| 639 | |
| 640 | kbufs[n] = vmalloc(len); |
| 641 | if (!kbufs[n]) { |
| 642 | ret = -ENOMEM; |
| 643 | goto out_free; |
| 644 | } |
| 645 | if (copy_from_user(kbufs[n], base, len)) { |
| 646 | ret = -EFAULT; |
| 647 | vfree(kbufs[n]); |
| 648 | goto out_free; |
| 649 | } |
| 650 | } |
| 651 | |
Jiro SEKIBA | 1cf58fa | 2009-09-03 22:24:17 +0900 | [diff] [blame] | 652 | /* |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 653 | * nilfs_ioctl_move_blocks() will call nilfs_iget_for_gc(), |
Jiro SEKIBA | 1cf58fa | 2009-09-03 22:24:17 +0900 | [diff] [blame] | 654 | * which will operates an inode list without blocking. |
| 655 | * To protect the list from concurrent operations, |
| 656 | * nilfs_ioctl_move_blocks should be atomic operation. |
| 657 | */ |
| 658 | if (test_and_set_bit(THE_NILFS_GC_RUNNING, &nilfs->ns_flags)) { |
| 659 | ret = -EBUSY; |
| 660 | goto out_free; |
| 661 | } |
| 662 | |
Ryusuke Konishi | 5beb6e0 | 2010-09-20 18:19:06 +0900 | [diff] [blame] | 663 | vfs_check_frozen(inode->i_sb, SB_FREEZE_WRITE); |
| 664 | |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 665 | ret = nilfs_ioctl_move_blocks(inode->i_sb, &argv[0], kbufs[0]); |
Jiro SEKIBA | 1cf58fa | 2009-09-03 22:24:17 +0900 | [diff] [blame] | 666 | if (ret < 0) |
| 667 | printk(KERN_ERR "NILFS: GC failed during preparation: " |
| 668 | "cannot read source blocks: err=%d\n", ret); |
| 669 | else |
| 670 | ret = nilfs_clean_segments(inode->i_sb, argv, kbufs); |
| 671 | |
Ryusuke Konishi | 263d90c | 2010-08-20 19:06:11 +0900 | [diff] [blame] | 672 | nilfs_remove_all_gcinodes(nilfs); |
Jiro SEKIBA | 1cf58fa | 2009-09-03 22:24:17 +0900 | [diff] [blame] | 673 | clear_nilfs_gc_running(nilfs); |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 674 | |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 675 | out_free: |
Ryusuke Konishi | d5046853 | 2009-05-22 20:36:21 +0900 | [diff] [blame] | 676 | while (--n >= 0) |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 677 | vfree(kbufs[n]); |
| 678 | kfree(kbufs[4]); |
Ryusuke Konishi | 7512487 | 2010-01-26 13:59:40 +0900 | [diff] [blame] | 679 | out: |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 680 | mnt_drop_write_file(filp); |
Ryusuke Konishi | 4f6b828 | 2009-05-10 22:41:43 +0900 | [diff] [blame] | 681 | return ret; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 682 | } |
| 683 | |
| 684 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, |
| 685 | unsigned int cmd, void __user *argp) |
| 686 | { |
| 687 | __u64 cno; |
| 688 | int ret; |
Jiro SEKIBA | 0d561f1 | 2010-02-20 19:47:49 +0900 | [diff] [blame] | 689 | struct the_nilfs *nilfs; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 690 | |
| 691 | ret = nilfs_construct_segment(inode->i_sb); |
| 692 | if (ret < 0) |
| 693 | return ret; |
| 694 | |
Ryusuke Konishi | 1147597 | 2012-05-31 16:26:11 -0700 | [diff] [blame^] | 695 | nilfs = inode->i_sb->s_fs_info; |
| 696 | if (nilfs_test_opt(nilfs, BARRIER)) { |
| 697 | ret = blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL); |
| 698 | if (ret == -EIO) |
| 699 | return ret; |
| 700 | } |
| 701 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 702 | if (argp != NULL) { |
Jiro SEKIBA | 0d561f1 | 2010-02-20 19:47:49 +0900 | [diff] [blame] | 703 | down_read(&nilfs->ns_segctor_sem); |
| 704 | cno = nilfs->ns_cno - 1; |
| 705 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 706 | if (copy_to_user(argp, &cno, sizeof(cno))) |
| 707 | return -EFAULT; |
| 708 | } |
| 709 | return 0; |
| 710 | } |
| 711 | |
Ryusuke Konishi | 4e33f9e | 2011-05-05 01:23:58 +0900 | [diff] [blame] | 712 | static int nilfs_ioctl_resize(struct inode *inode, struct file *filp, |
| 713 | void __user *argp) |
| 714 | { |
| 715 | __u64 newsize; |
| 716 | int ret = -EPERM; |
| 717 | |
| 718 | if (!capable(CAP_SYS_ADMIN)) |
| 719 | goto out; |
| 720 | |
Al Viro | a561be7 | 2011-11-23 11:57:51 -0500 | [diff] [blame] | 721 | ret = mnt_want_write_file(filp); |
Ryusuke Konishi | 4e33f9e | 2011-05-05 01:23:58 +0900 | [diff] [blame] | 722 | if (ret) |
| 723 | goto out; |
| 724 | |
| 725 | ret = -EFAULT; |
| 726 | if (copy_from_user(&newsize, argp, sizeof(newsize))) |
| 727 | goto out_drop_write; |
| 728 | |
| 729 | ret = nilfs_resize_fs(inode->i_sb, newsize); |
| 730 | |
| 731 | out_drop_write: |
Al Viro | 2a79f17 | 2011-12-09 08:06:57 -0500 | [diff] [blame] | 732 | mnt_drop_write_file(filp); |
Ryusuke Konishi | 4e33f9e | 2011-05-05 01:23:58 +0900 | [diff] [blame] | 733 | out: |
| 734 | return ret; |
| 735 | } |
| 736 | |
Ryusuke Konishi | 619205d | 2011-05-05 01:23:57 +0900 | [diff] [blame] | 737 | static int nilfs_ioctl_set_alloc_range(struct inode *inode, void __user *argp) |
| 738 | { |
| 739 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
| 740 | __u64 range[2]; |
| 741 | __u64 minseg, maxseg; |
| 742 | unsigned long segbytes; |
| 743 | int ret = -EPERM; |
| 744 | |
| 745 | if (!capable(CAP_SYS_ADMIN)) |
| 746 | goto out; |
| 747 | |
| 748 | ret = -EFAULT; |
| 749 | if (copy_from_user(range, argp, sizeof(__u64[2]))) |
| 750 | goto out; |
| 751 | |
| 752 | ret = -ERANGE; |
| 753 | if (range[1] > i_size_read(inode->i_sb->s_bdev->bd_inode)) |
| 754 | goto out; |
| 755 | |
| 756 | segbytes = nilfs->ns_blocks_per_segment * nilfs->ns_blocksize; |
| 757 | |
| 758 | minseg = range[0] + segbytes - 1; |
| 759 | do_div(minseg, segbytes); |
| 760 | maxseg = NILFS_SB2_OFFSET_BYTES(range[1]); |
| 761 | do_div(maxseg, segbytes); |
| 762 | maxseg--; |
| 763 | |
| 764 | ret = nilfs_sufile_set_alloc_range(nilfs->ns_sufile, minseg, maxseg); |
| 765 | out: |
| 766 | return ret; |
| 767 | } |
| 768 | |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 769 | static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, |
| 770 | unsigned int cmd, void __user *argp, |
Ryusuke Konishi | 83aca8f | 2009-05-11 23:24:47 +0900 | [diff] [blame] | 771 | size_t membsz, |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 772 | ssize_t (*dofunc)(struct the_nilfs *, |
| 773 | __u64 *, int, |
| 774 | void *, size_t, size_t)) |
| 775 | |
| 776 | { |
Ryusuke Konishi | e3154e9 | 2011-03-09 11:05:08 +0900 | [diff] [blame] | 777 | struct the_nilfs *nilfs = inode->i_sb->s_fs_info; |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 778 | struct nilfs_argv argv; |
| 779 | int ret; |
| 780 | |
| 781 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 782 | return -EFAULT; |
| 783 | |
Ryusuke Konishi | 003ff18 | 2009-05-12 03:58:47 +0900 | [diff] [blame] | 784 | if (argv.v_size < membsz) |
Ryusuke Konishi | 83aca8f | 2009-05-11 23:24:47 +0900 | [diff] [blame] | 785 | return -EINVAL; |
| 786 | |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 787 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); |
| 788 | if (ret < 0) |
| 789 | return ret; |
| 790 | |
| 791 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 792 | ret = -EFAULT; |
| 793 | return ret; |
| 794 | } |
| 795 | |
Ryusuke Konishi | 7a94619 | 2009-04-06 19:01:53 -0700 | [diff] [blame] | 796 | long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 797 | { |
Ryusuke Konishi | 7a94619 | 2009-04-06 19:01:53 -0700 | [diff] [blame] | 798 | struct inode *inode = filp->f_dentry->d_inode; |
Li Hong | 7532340 | 2010-03-31 15:41:00 +0800 | [diff] [blame] | 799 | void __user *argp = (void __user *)arg; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 800 | |
| 801 | switch (cmd) { |
Ryusuke Konishi | cde98f0 | 2011-01-20 02:09:53 +0900 | [diff] [blame] | 802 | case FS_IOC_GETFLAGS: |
| 803 | return nilfs_ioctl_getflags(inode, argp); |
| 804 | case FS_IOC_SETFLAGS: |
| 805 | return nilfs_ioctl_setflags(inode, filp, argp); |
| 806 | case FS_IOC_GETVERSION: |
| 807 | return nilfs_ioctl_getversion(inode, argp); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 808 | case NILFS_IOCTL_CHANGE_CPMODE: |
| 809 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); |
| 810 | case NILFS_IOCTL_DELETE_CHECKPOINT: |
| 811 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); |
| 812 | case NILFS_IOCTL_GET_CPINFO: |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 813 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
Ryusuke Konishi | 83aca8f | 2009-05-11 23:24:47 +0900 | [diff] [blame] | 814 | sizeof(struct nilfs_cpinfo), |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 815 | nilfs_ioctl_do_get_cpinfo); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 816 | case NILFS_IOCTL_GET_CPSTAT: |
| 817 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); |
| 818 | case NILFS_IOCTL_GET_SUINFO: |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 819 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
Ryusuke Konishi | 83aca8f | 2009-05-11 23:24:47 +0900 | [diff] [blame] | 820 | sizeof(struct nilfs_suinfo), |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 821 | nilfs_ioctl_do_get_suinfo); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 822 | case NILFS_IOCTL_GET_SUSTAT: |
| 823 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); |
| 824 | case NILFS_IOCTL_GET_VINFO: |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 825 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
Ryusuke Konishi | 83aca8f | 2009-05-11 23:24:47 +0900 | [diff] [blame] | 826 | sizeof(struct nilfs_vinfo), |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame] | 827 | nilfs_ioctl_do_get_vinfo); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 828 | case NILFS_IOCTL_GET_BDESCS: |
| 829 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); |
| 830 | case NILFS_IOCTL_CLEAN_SEGMENTS: |
| 831 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 832 | case NILFS_IOCTL_SYNC: |
| 833 | return nilfs_ioctl_sync(inode, filp, cmd, argp); |
Ryusuke Konishi | 4e33f9e | 2011-05-05 01:23:58 +0900 | [diff] [blame] | 834 | case NILFS_IOCTL_RESIZE: |
| 835 | return nilfs_ioctl_resize(inode, filp, argp); |
Ryusuke Konishi | 619205d | 2011-05-05 01:23:57 +0900 | [diff] [blame] | 836 | case NILFS_IOCTL_SET_ALLOC_RANGE: |
| 837 | return nilfs_ioctl_set_alloc_range(inode, argp); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 838 | default: |
| 839 | return -ENOTTY; |
| 840 | } |
| 841 | } |
Ryusuke Konishi | 828b1c5 | 2011-02-03 21:26:17 +0900 | [diff] [blame] | 842 | |
| 843 | #ifdef CONFIG_COMPAT |
| 844 | long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 845 | { |
| 846 | switch (cmd) { |
| 847 | case FS_IOC32_GETFLAGS: |
| 848 | cmd = FS_IOC_GETFLAGS; |
| 849 | break; |
| 850 | case FS_IOC32_SETFLAGS: |
| 851 | cmd = FS_IOC_SETFLAGS; |
| 852 | break; |
| 853 | case FS_IOC32_GETVERSION: |
| 854 | cmd = FS_IOC_GETVERSION; |
| 855 | break; |
Thomas Meyer | 695c60f | 2011-12-19 17:11:55 -0800 | [diff] [blame] | 856 | case NILFS_IOCTL_CHANGE_CPMODE: |
| 857 | case NILFS_IOCTL_DELETE_CHECKPOINT: |
| 858 | case NILFS_IOCTL_GET_CPINFO: |
| 859 | case NILFS_IOCTL_GET_CPSTAT: |
| 860 | case NILFS_IOCTL_GET_SUINFO: |
| 861 | case NILFS_IOCTL_GET_SUSTAT: |
| 862 | case NILFS_IOCTL_GET_VINFO: |
| 863 | case NILFS_IOCTL_GET_BDESCS: |
| 864 | case NILFS_IOCTL_CLEAN_SEGMENTS: |
| 865 | case NILFS_IOCTL_SYNC: |
| 866 | case NILFS_IOCTL_RESIZE: |
| 867 | case NILFS_IOCTL_SET_ALLOC_RANGE: |
| 868 | break; |
Ryusuke Konishi | 828b1c5 | 2011-02-03 21:26:17 +0900 | [diff] [blame] | 869 | default: |
| 870 | return -ENOIOCTLCMD; |
| 871 | } |
| 872 | return nilfs_ioctl(filp, cmd, (unsigned long)compat_ptr(arg)); |
| 873 | } |
| 874 | #endif |