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> |
| 25 | #include <linux/smp_lock.h> /* lock_kernel(), unlock_kernel() */ |
| 26 | #include <linux/capability.h> /* capable() */ |
| 27 | #include <linux/uaccess.h> /* copy_from_user(), copy_to_user() */ |
| 28 | #include <linux/nilfs2_fs.h> |
| 29 | #include "nilfs.h" |
| 30 | #include "segment.h" |
| 31 | #include "bmap.h" |
| 32 | #include "cpfile.h" |
| 33 | #include "sufile.h" |
| 34 | #include "dat.h" |
| 35 | |
| 36 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 37 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, |
| 38 | struct nilfs_argv *argv, int dir, |
| 39 | ssize_t (*dofunc)(struct the_nilfs *, |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 40 | __u64 *, int, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 41 | void *, size_t, size_t)) |
| 42 | { |
| 43 | void *buf; |
Ryusuke Konishi | dc498d0 | 2009-04-06 19:01:52 -0700 | [diff] [blame] | 44 | void __user *base = (void __user *)(unsigned long)argv->v_base; |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 45 | size_t maxmembs, total, n; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 46 | ssize_t nr; |
| 47 | int ret, i; |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 48 | __u64 pos, ppos; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 49 | |
| 50 | if (argv->v_nmembs == 0) |
| 51 | return 0; |
| 52 | |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 53 | if (argv->v_size > PAGE_SIZE) |
| 54 | return -EINVAL; |
| 55 | |
| 56 | buf = (void *)__get_free_pages(GFP_NOFS, 0); |
| 57 | if (unlikely(!buf)) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 58 | return -ENOMEM; |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 59 | maxmembs = PAGE_SIZE / argv->v_size; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 60 | |
| 61 | ret = 0; |
| 62 | total = 0; |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 63 | pos = argv->v_index; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 64 | for (i = 0; i < argv->v_nmembs; i += n) { |
| 65 | n = (argv->v_nmembs - i < maxmembs) ? |
| 66 | argv->v_nmembs - i : maxmembs; |
| 67 | if ((dir & _IOC_WRITE) && |
Ryusuke Konishi | dc498d0 | 2009-04-06 19:01:52 -0700 | [diff] [blame] | 68 | copy_from_user(buf, base + argv->v_size * i, |
| 69 | argv->v_size * n)) { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 70 | ret = -EFAULT; |
| 71 | break; |
| 72 | } |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 73 | ppos = pos; |
Pekka Enberg | 8acfbf0 | 2009-04-06 19:01:49 -0700 | [diff] [blame] | 74 | nr = dofunc(nilfs, &pos, argv->v_flags, buf, argv->v_size, |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 75 | n); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 76 | if (nr < 0) { |
| 77 | ret = nr; |
| 78 | break; |
| 79 | } |
| 80 | if ((dir & _IOC_READ) && |
Ryusuke Konishi | dc498d0 | 2009-04-06 19:01:52 -0700 | [diff] [blame] | 81 | copy_to_user(base + argv->v_size * i, buf, |
| 82 | argv->v_size * nr)) { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 83 | ret = -EFAULT; |
| 84 | break; |
| 85 | } |
| 86 | total += nr; |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 87 | if ((size_t)nr < n) |
| 88 | break; |
| 89 | if (pos == ppos) |
| 90 | pos += n; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 91 | } |
| 92 | argv->v_nmembs = total; |
| 93 | |
Ryusuke Konishi | 3358b4a | 2009-04-06 19:01:43 -0700 | [diff] [blame] | 94 | free_pages((unsigned long)buf, 0); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 95 | return ret; |
| 96 | } |
| 97 | |
| 98 | static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, |
| 99 | unsigned int cmd, void __user *argp) |
| 100 | { |
| 101 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; |
| 102 | struct nilfs_transaction_info ti; |
| 103 | struct nilfs_cpmode cpmode; |
| 104 | int ret; |
| 105 | |
| 106 | if (!capable(CAP_SYS_ADMIN)) |
| 107 | return -EPERM; |
| 108 | if (copy_from_user(&cpmode, argp, sizeof(cpmode))) |
| 109 | return -EFAULT; |
| 110 | |
| 111 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 112 | ret = nilfs_cpfile_change_cpmode( |
| 113 | cpfile, cpmode.cm_cno, cpmode.cm_mode); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 114 | if (unlikely(ret < 0)) { |
| 115 | nilfs_transaction_abort(inode->i_sb); |
| 116 | return ret; |
| 117 | } |
| 118 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 119 | return ret; |
| 120 | } |
| 121 | |
| 122 | static int |
| 123 | nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, |
| 124 | unsigned int cmd, void __user *argp) |
| 125 | { |
| 126 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; |
| 127 | struct nilfs_transaction_info ti; |
| 128 | __u64 cno; |
| 129 | int ret; |
| 130 | |
| 131 | if (!capable(CAP_SYS_ADMIN)) |
| 132 | return -EPERM; |
| 133 | if (copy_from_user(&cno, argp, sizeof(cno))) |
| 134 | return -EFAULT; |
| 135 | |
| 136 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 137 | ret = nilfs_cpfile_delete_checkpoint(cpfile, cno); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 138 | if (unlikely(ret < 0)) { |
| 139 | nilfs_transaction_abort(inode->i_sb); |
| 140 | return ret; |
| 141 | } |
| 142 | nilfs_transaction_commit(inode->i_sb); /* never fails */ |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 143 | return ret; |
| 144 | } |
| 145 | |
| 146 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 147 | 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] | 148 | void *buf, size_t size, size_t nmembs) |
| 149 | { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 150 | int ret; |
| 151 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 152 | down_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 153 | ret = nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, posp, flags, buf, |
| 154 | nmembs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 155 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 156 | return ret; |
| 157 | } |
| 158 | |
| 159 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, |
| 160 | unsigned int cmd, void __user *argp) |
| 161 | { |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 162 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 163 | struct nilfs_cpstat cpstat; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 164 | int ret; |
| 165 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 166 | down_read(&nilfs->ns_segctor_sem); |
| 167 | ret = nilfs_cpfile_get_stat(nilfs->ns_cpfile, &cpstat); |
| 168 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 169 | if (ret < 0) |
| 170 | return ret; |
| 171 | |
| 172 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) |
| 173 | ret = -EFAULT; |
| 174 | return ret; |
| 175 | } |
| 176 | |
| 177 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 178 | 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] | 179 | void *buf, size_t size, size_t nmembs) |
| 180 | { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 181 | int ret; |
| 182 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 183 | down_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 184 | ret = nilfs_sufile_get_suinfo(nilfs->ns_sufile, *posp, buf, nmembs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 185 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 186 | return ret; |
| 187 | } |
| 188 | |
| 189 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, |
| 190 | unsigned int cmd, void __user *argp) |
| 191 | { |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 192 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 193 | struct nilfs_sustat sustat; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 194 | int ret; |
| 195 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 196 | down_read(&nilfs->ns_segctor_sem); |
| 197 | ret = nilfs_sufile_get_stat(nilfs->ns_sufile, &sustat); |
| 198 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 199 | if (ret < 0) |
| 200 | return ret; |
| 201 | |
| 202 | if (copy_to_user(argp, &sustat, sizeof(sustat))) |
| 203 | ret = -EFAULT; |
| 204 | return ret; |
| 205 | } |
| 206 | |
| 207 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 208 | 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] | 209 | void *buf, size_t size, size_t nmembs) |
| 210 | { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 211 | int ret; |
| 212 | |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 213 | down_read(&nilfs->ns_segctor_sem); |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 214 | ret = nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 215 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 216 | return ret; |
| 217 | } |
| 218 | |
| 219 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 220 | 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] | 221 | void *buf, size_t size, size_t nmembs) |
| 222 | { |
| 223 | struct inode *dat = nilfs_dat_inode(nilfs); |
| 224 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; |
| 225 | struct nilfs_bdesc *bdescs = buf; |
| 226 | int ret, i; |
| 227 | |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 228 | down_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 229 | for (i = 0; i < nmembs; i++) { |
| 230 | ret = nilfs_bmap_lookup_at_level(bmap, |
| 231 | bdescs[i].bd_offset, |
| 232 | bdescs[i].bd_level + 1, |
| 233 | &bdescs[i].bd_blocknr); |
| 234 | if (ret < 0) { |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 235 | if (ret != -ENOENT) { |
| 236 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 237 | return ret; |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 238 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 239 | bdescs[i].bd_blocknr = 0; |
| 240 | } |
| 241 | } |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 242 | up_read(&nilfs->ns_segctor_sem); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 243 | return nmembs; |
| 244 | } |
| 245 | |
| 246 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, |
| 247 | unsigned int cmd, void __user *argp) |
| 248 | { |
| 249 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
| 250 | struct nilfs_argv argv; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 251 | int ret; |
| 252 | |
| 253 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 254 | return -EFAULT; |
| 255 | |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 256 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
| 257 | nilfs_ioctl_do_get_bdescs); |
Ryusuke Konishi | 47420c7 | 2009-04-06 19:01:45 -0700 | [diff] [blame] | 258 | if (ret < 0) |
| 259 | return ret; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 260 | |
| 261 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 262 | ret = -EFAULT; |
| 263 | return ret; |
| 264 | } |
| 265 | |
| 266 | static int nilfs_ioctl_move_inode_block(struct inode *inode, |
| 267 | struct nilfs_vdesc *vdesc, |
| 268 | struct list_head *buffers) |
| 269 | { |
| 270 | struct buffer_head *bh; |
| 271 | int ret; |
| 272 | |
| 273 | if (vdesc->vd_flags == 0) |
| 274 | ret = nilfs_gccache_submit_read_data( |
| 275 | inode, vdesc->vd_offset, vdesc->vd_blocknr, |
| 276 | vdesc->vd_vblocknr, &bh); |
| 277 | else |
| 278 | ret = nilfs_gccache_submit_read_node( |
| 279 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); |
| 280 | |
| 281 | if (unlikely(ret < 0)) { |
| 282 | if (ret == -ENOENT) |
| 283 | printk(KERN_CRIT |
| 284 | "%s: invalid virtual block address (%s): " |
| 285 | "ino=%llu, cno=%llu, offset=%llu, " |
| 286 | "blocknr=%llu, vblocknr=%llu\n", |
| 287 | __func__, vdesc->vd_flags ? "node" : "data", |
| 288 | (unsigned long long)vdesc->vd_ino, |
| 289 | (unsigned long long)vdesc->vd_cno, |
| 290 | (unsigned long long)vdesc->vd_offset, |
| 291 | (unsigned long long)vdesc->vd_blocknr, |
| 292 | (unsigned long long)vdesc->vd_vblocknr); |
| 293 | return ret; |
| 294 | } |
| 295 | bh->b_private = vdesc; |
| 296 | list_add_tail(&bh->b_assoc_buffers, buffers); |
| 297 | return 0; |
| 298 | } |
| 299 | |
| 300 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 301 | nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, __u64 *posp, int flags, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 302 | void *buf, size_t size, size_t nmembs) |
| 303 | { |
| 304 | struct inode *inode; |
| 305 | struct nilfs_vdesc *vdesc; |
| 306 | struct buffer_head *bh, *n; |
| 307 | LIST_HEAD(buffers); |
| 308 | ino_t ino; |
| 309 | __u64 cno; |
| 310 | int i, ret; |
| 311 | |
| 312 | for (i = 0, vdesc = buf; i < nmembs; ) { |
| 313 | ino = vdesc->vd_ino; |
| 314 | cno = vdesc->vd_cno; |
| 315 | inode = nilfs_gc_iget(nilfs, ino, cno); |
| 316 | if (unlikely(inode == NULL)) { |
| 317 | ret = -ENOMEM; |
| 318 | goto failed; |
| 319 | } |
| 320 | do { |
| 321 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, |
| 322 | &buffers); |
| 323 | if (unlikely(ret < 0)) |
| 324 | goto failed; |
| 325 | vdesc++; |
| 326 | } while (++i < nmembs && |
| 327 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); |
| 328 | } |
| 329 | |
| 330 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { |
| 331 | ret = nilfs_gccache_wait_and_mark_dirty(bh); |
| 332 | if (unlikely(ret < 0)) { |
| 333 | if (ret == -EEXIST) { |
| 334 | vdesc = bh->b_private; |
| 335 | printk(KERN_CRIT |
| 336 | "%s: conflicting %s buffer: " |
| 337 | "ino=%llu, cno=%llu, offset=%llu, " |
| 338 | "blocknr=%llu, vblocknr=%llu\n", |
| 339 | __func__, |
| 340 | vdesc->vd_flags ? "node" : "data", |
| 341 | (unsigned long long)vdesc->vd_ino, |
| 342 | (unsigned long long)vdesc->vd_cno, |
| 343 | (unsigned long long)vdesc->vd_offset, |
| 344 | (unsigned long long)vdesc->vd_blocknr, |
| 345 | (unsigned long long)vdesc->vd_vblocknr); |
| 346 | } |
| 347 | goto failed; |
| 348 | } |
| 349 | list_del_init(&bh->b_assoc_buffers); |
| 350 | bh->b_private = NULL; |
| 351 | brelse(bh); |
| 352 | } |
| 353 | return nmembs; |
| 354 | |
| 355 | failed: |
| 356 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { |
| 357 | list_del_init(&bh->b_assoc_buffers); |
| 358 | bh->b_private = NULL; |
| 359 | brelse(bh); |
| 360 | } |
| 361 | return ret; |
| 362 | } |
| 363 | |
| 364 | static inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs, |
| 365 | struct nilfs_argv *argv, |
| 366 | int dir) |
| 367 | { |
| 368 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 369 | nilfs_ioctl_do_move_blocks); |
| 370 | } |
| 371 | |
| 372 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 373 | nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, __u64 *posp, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 374 | int flags, void *buf, size_t size, |
| 375 | size_t nmembs) |
| 376 | { |
| 377 | struct inode *cpfile = nilfs->ns_cpfile; |
| 378 | struct nilfs_period *periods = buf; |
| 379 | int ret, i; |
| 380 | |
| 381 | for (i = 0; i < nmembs; i++) { |
| 382 | ret = nilfs_cpfile_delete_checkpoints( |
| 383 | cpfile, periods[i].p_start, periods[i].p_end); |
| 384 | if (ret < 0) |
| 385 | return ret; |
| 386 | } |
| 387 | return nmembs; |
| 388 | } |
| 389 | |
| 390 | static inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, |
| 391 | struct nilfs_argv *argv, |
| 392 | int dir) |
| 393 | { |
| 394 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 395 | nilfs_ioctl_do_delete_checkpoints); |
| 396 | } |
| 397 | |
| 398 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 399 | nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, __u64 *posp, int flags, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 400 | void *buf, size_t size, size_t nmembs) |
| 401 | { |
| 402 | int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs); |
| 403 | |
| 404 | return (ret < 0) ? ret : nmembs; |
| 405 | } |
| 406 | |
| 407 | static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, |
| 408 | struct nilfs_argv *argv, |
| 409 | int dir) |
| 410 | { |
| 411 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 412 | nilfs_ioctl_do_free_vblocknrs); |
| 413 | } |
| 414 | |
| 415 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 416 | nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, __u64 *posp, |
| 417 | int flags, void *buf, size_t size, |
| 418 | size_t nmembs) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 419 | { |
| 420 | struct inode *dat = nilfs_dat_inode(nilfs); |
| 421 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; |
| 422 | struct nilfs_bdesc *bdescs = buf; |
| 423 | int ret, i; |
| 424 | |
| 425 | for (i = 0; i < nmembs; i++) { |
| 426 | /* XXX: use macro or inline func to check liveness */ |
| 427 | ret = nilfs_bmap_lookup_at_level(bmap, |
| 428 | bdescs[i].bd_offset, |
| 429 | bdescs[i].bd_level + 1, |
| 430 | &bdescs[i].bd_blocknr); |
| 431 | if (ret < 0) { |
| 432 | if (ret != -ENOENT) |
| 433 | return ret; |
| 434 | bdescs[i].bd_blocknr = 0; |
| 435 | } |
| 436 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) |
| 437 | /* skip dead block */ |
| 438 | continue; |
| 439 | if (bdescs[i].bd_level == 0) { |
| 440 | ret = nilfs_mdt_mark_block_dirty(dat, |
| 441 | bdescs[i].bd_offset); |
| 442 | if (ret < 0) { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 443 | WARN_ON(ret == -ENOENT); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 444 | return ret; |
| 445 | } |
| 446 | } else { |
| 447 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, |
| 448 | bdescs[i].bd_level); |
| 449 | if (ret < 0) { |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 450 | WARN_ON(ret == -ENOENT); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 451 | return ret; |
| 452 | } |
| 453 | } |
| 454 | } |
| 455 | return nmembs; |
| 456 | } |
| 457 | |
| 458 | static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, |
| 459 | struct nilfs_argv *argv, |
| 460 | int dir) |
| 461 | { |
| 462 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 463 | nilfs_ioctl_do_mark_blocks_dirty); |
| 464 | } |
| 465 | |
| 466 | static ssize_t |
Ryusuke Konishi | b028fcf | 2009-04-06 19:01:47 -0700 | [diff] [blame] | 467 | nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, __u64 *posp, int flags, |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 468 | void *buf, size_t size, size_t nmembs) |
| 469 | { |
Ryusuke Konishi | 201913e | 2009-04-28 21:04:59 +0900 | [diff] [blame] | 470 | struct nilfs_sb_info *sbi = nilfs->ns_writer; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 471 | int ret; |
| 472 | |
Ryusuke Konishi | 201913e | 2009-04-28 21:04:59 +0900 | [diff] [blame] | 473 | if (unlikely(!sbi)) { |
| 474 | /* never happens because called for a writable mount */ |
| 475 | WARN_ON(1); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 476 | return -EROFS; |
Ryusuke Konishi | 201913e | 2009-04-28 21:04:59 +0900 | [diff] [blame] | 477 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 478 | ret = nilfs_segctor_add_segments_to_be_freed( |
| 479 | NILFS_SC(sbi), buf, nmembs); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 480 | |
| 481 | return (ret < 0) ? ret : nmembs; |
| 482 | } |
| 483 | |
| 484 | static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs, |
| 485 | struct nilfs_argv *argv, |
| 486 | int dir) |
| 487 | { |
| 488 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 489 | nilfs_ioctl_do_free_segments); |
| 490 | } |
| 491 | |
| 492 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, |
| 493 | void __user *argp) |
| 494 | { |
| 495 | struct nilfs_argv argv[5]; |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 496 | const char *msg; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 497 | int dir, ret; |
| 498 | |
| 499 | if (copy_from_user(argv, argp, sizeof(argv))) |
| 500 | return -EFAULT; |
| 501 | |
| 502 | dir = _IOC_WRITE; |
| 503 | ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 504 | if (ret < 0) { |
| 505 | msg = "cannot read source blocks"; |
| 506 | goto failed; |
| 507 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 508 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 509 | if (ret < 0) { |
| 510 | /* |
| 511 | * can safely abort because checkpoints can be removed |
| 512 | * independently. |
| 513 | */ |
| 514 | msg = "cannot delete checkpoints"; |
| 515 | goto failed; |
| 516 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 517 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 518 | if (ret < 0) { |
| 519 | /* |
| 520 | * can safely abort because DAT file is updated atomically |
| 521 | * using a copy-on-write technique. |
| 522 | */ |
| 523 | msg = "cannot delete virtual blocks from DAT file"; |
| 524 | goto failed; |
| 525 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 526 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 527 | if (ret < 0) { |
| 528 | /* |
| 529 | * can safely abort because the operation is nondestructive. |
| 530 | */ |
| 531 | msg = "cannot mark copying blocks dirty"; |
| 532 | goto failed; |
| 533 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 534 | ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 535 | if (ret < 0) { |
| 536 | /* |
| 537 | * can safely abort because this operation is atomic. |
| 538 | */ |
| 539 | msg = "cannot set segments to be freed"; |
| 540 | goto failed; |
| 541 | } |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 542 | return 0; |
| 543 | |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 544 | failed: |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 545 | nilfs_remove_all_gcinode(nilfs); |
Ryusuke Konishi | 1f5abe7 | 2009-04-06 19:01:55 -0700 | [diff] [blame] | 546 | printk(KERN_ERR "NILFS: GC failed during preparation: %s: err=%d\n", |
| 547 | msg, ret); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 548 | return ret; |
| 549 | } |
| 550 | |
| 551 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, |
| 552 | unsigned int cmd, void __user *argp) |
| 553 | { |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 554 | if (!capable(CAP_SYS_ADMIN)) |
| 555 | return -EPERM; |
Ryusuke Konishi | 1088dcf | 2009-04-06 19:01:51 -0700 | [diff] [blame] | 556 | return nilfs_clean_segments(inode->i_sb, argp); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 557 | } |
| 558 | |
| 559 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, |
| 560 | unsigned int cmd, void __user *argp) |
| 561 | { |
| 562 | __u64 cno; |
| 563 | int ret; |
| 564 | |
| 565 | ret = nilfs_construct_segment(inode->i_sb); |
| 566 | if (ret < 0) |
| 567 | return ret; |
| 568 | |
| 569 | if (argp != NULL) { |
| 570 | cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1; |
| 571 | if (copy_to_user(argp, &cno, sizeof(cno))) |
| 572 | return -EFAULT; |
| 573 | } |
| 574 | return 0; |
| 575 | } |
| 576 | |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 577 | static int nilfs_ioctl_get_info(struct inode *inode, struct file *filp, |
| 578 | unsigned int cmd, void __user *argp, |
| 579 | ssize_t (*dofunc)(struct the_nilfs *, |
| 580 | __u64 *, int, |
| 581 | void *, size_t, size_t)) |
| 582 | |
| 583 | { |
| 584 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
| 585 | struct nilfs_argv argv; |
| 586 | int ret; |
| 587 | |
| 588 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 589 | return -EFAULT; |
| 590 | |
| 591 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), dofunc); |
| 592 | if (ret < 0) |
| 593 | return ret; |
| 594 | |
| 595 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 596 | ret = -EFAULT; |
| 597 | return ret; |
| 598 | } |
| 599 | |
Ryusuke Konishi | 7a94619 | 2009-04-06 19:01:53 -0700 | [diff] [blame] | 600 | long nilfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 601 | { |
Ryusuke Konishi | 7a94619 | 2009-04-06 19:01:53 -0700 | [diff] [blame] | 602 | struct inode *inode = filp->f_dentry->d_inode; |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 603 | void __user *argp = (void * __user *)arg; |
| 604 | |
| 605 | switch (cmd) { |
| 606 | case NILFS_IOCTL_CHANGE_CPMODE: |
| 607 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); |
| 608 | case NILFS_IOCTL_DELETE_CHECKPOINT: |
| 609 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); |
| 610 | case NILFS_IOCTL_GET_CPINFO: |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 611 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
| 612 | nilfs_ioctl_do_get_cpinfo); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 613 | case NILFS_IOCTL_GET_CPSTAT: |
| 614 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); |
| 615 | case NILFS_IOCTL_GET_SUINFO: |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 616 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
| 617 | nilfs_ioctl_do_get_suinfo); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 618 | case NILFS_IOCTL_GET_SUSTAT: |
| 619 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); |
| 620 | case NILFS_IOCTL_GET_VINFO: |
Ryusuke Konishi | 47eb6b9 | 2009-04-30 02:21:00 +0900 | [diff] [blame^] | 621 | return nilfs_ioctl_get_info(inode, filp, cmd, argp, |
| 622 | nilfs_ioctl_do_get_vinfo); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 623 | case NILFS_IOCTL_GET_BDESCS: |
| 624 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); |
| 625 | case NILFS_IOCTL_CLEAN_SEGMENTS: |
| 626 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); |
Koji Sato | 7942b91 | 2009-04-06 19:01:41 -0700 | [diff] [blame] | 627 | case NILFS_IOCTL_SYNC: |
| 628 | return nilfs_ioctl_sync(inode, filp, cmd, argp); |
| 629 | default: |
| 630 | return -ENOTTY; |
| 631 | } |
| 632 | } |