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 | |
| 37 | #define KMALLOC_SIZE_MIN 4096 /* 4KB */ |
| 38 | #define KMALLOC_SIZE_MAX 131072 /* 128 KB */ |
| 39 | |
| 40 | static int nilfs_ioctl_wrap_copy(struct the_nilfs *nilfs, |
| 41 | struct nilfs_argv *argv, int dir, |
| 42 | ssize_t (*dofunc)(struct the_nilfs *, |
| 43 | int, int, |
| 44 | void *, size_t, size_t)) |
| 45 | { |
| 46 | void *buf; |
| 47 | size_t ksize, maxmembs, total, n; |
| 48 | ssize_t nr; |
| 49 | int ret, i; |
| 50 | |
| 51 | if (argv->v_nmembs == 0) |
| 52 | return 0; |
| 53 | |
| 54 | for (ksize = KMALLOC_SIZE_MAX; ksize >= KMALLOC_SIZE_MIN; ksize /= 2) { |
| 55 | buf = kmalloc(ksize, GFP_NOFS); |
| 56 | if (buf != NULL) |
| 57 | break; |
| 58 | } |
| 59 | if (ksize < KMALLOC_SIZE_MIN) |
| 60 | return -ENOMEM; |
| 61 | maxmembs = ksize / argv->v_size; |
| 62 | |
| 63 | ret = 0; |
| 64 | total = 0; |
| 65 | for (i = 0; i < argv->v_nmembs; i += n) { |
| 66 | n = (argv->v_nmembs - i < maxmembs) ? |
| 67 | argv->v_nmembs - i : maxmembs; |
| 68 | if ((dir & _IOC_WRITE) && |
| 69 | copy_from_user(buf, |
| 70 | (void __user *)argv->v_base + argv->v_size * i, |
| 71 | argv->v_size * n)) { |
| 72 | ret = -EFAULT; |
| 73 | break; |
| 74 | } |
| 75 | nr = (*dofunc)(nilfs, argv->v_index + i, argv->v_flags, buf, |
| 76 | argv->v_size, n); |
| 77 | if (nr < 0) { |
| 78 | ret = nr; |
| 79 | break; |
| 80 | } |
| 81 | if ((dir & _IOC_READ) && |
| 82 | copy_to_user( |
| 83 | (void __user *)argv->v_base + argv->v_size * i, |
| 84 | buf, argv->v_size * nr)) { |
| 85 | ret = -EFAULT; |
| 86 | break; |
| 87 | } |
| 88 | total += nr; |
| 89 | } |
| 90 | argv->v_nmembs = total; |
| 91 | |
| 92 | kfree(buf); |
| 93 | return ret; |
| 94 | } |
| 95 | |
| 96 | static int nilfs_ioctl_change_cpmode(struct inode *inode, struct file *filp, |
| 97 | unsigned int cmd, void __user *argp) |
| 98 | { |
| 99 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; |
| 100 | struct nilfs_transaction_info ti; |
| 101 | struct nilfs_cpmode cpmode; |
| 102 | int ret; |
| 103 | |
| 104 | if (!capable(CAP_SYS_ADMIN)) |
| 105 | return -EPERM; |
| 106 | if (copy_from_user(&cpmode, argp, sizeof(cpmode))) |
| 107 | return -EFAULT; |
| 108 | |
| 109 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 110 | ret = nilfs_cpfile_change_cpmode( |
| 111 | cpfile, cpmode.cm_cno, cpmode.cm_mode); |
| 112 | nilfs_transaction_end(inode->i_sb, !ret); |
| 113 | return ret; |
| 114 | } |
| 115 | |
| 116 | static int |
| 117 | nilfs_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, |
| 118 | unsigned int cmd, void __user *argp) |
| 119 | { |
| 120 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; |
| 121 | struct nilfs_transaction_info ti; |
| 122 | __u64 cno; |
| 123 | int ret; |
| 124 | |
| 125 | if (!capable(CAP_SYS_ADMIN)) |
| 126 | return -EPERM; |
| 127 | if (copy_from_user(&cno, argp, sizeof(cno))) |
| 128 | return -EFAULT; |
| 129 | |
| 130 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 131 | ret = nilfs_cpfile_delete_checkpoint(cpfile, cno); |
| 132 | nilfs_transaction_end(inode->i_sb, !ret); |
| 133 | return ret; |
| 134 | } |
| 135 | |
| 136 | static ssize_t |
| 137 | nilfs_ioctl_do_get_cpinfo(struct the_nilfs *nilfs, int index, int flags, |
| 138 | void *buf, size_t size, size_t nmembs) |
| 139 | { |
| 140 | return nilfs_cpfile_get_cpinfo(nilfs->ns_cpfile, index, flags, buf, |
| 141 | nmembs); |
| 142 | } |
| 143 | |
| 144 | static int nilfs_ioctl_get_cpinfo(struct inode *inode, struct file *filp, |
| 145 | unsigned int cmd, void __user *argp) |
| 146 | { |
| 147 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
| 148 | struct nilfs_argv argv; |
| 149 | struct nilfs_transaction_info ti; |
| 150 | int ret; |
| 151 | |
| 152 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 153 | return -EFAULT; |
| 154 | |
| 155 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 156 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
| 157 | nilfs_ioctl_do_get_cpinfo); |
| 158 | nilfs_transaction_end(inode->i_sb, 0); |
| 159 | |
| 160 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 161 | ret = -EFAULT; |
| 162 | return ret; |
| 163 | } |
| 164 | |
| 165 | static int nilfs_ioctl_get_cpstat(struct inode *inode, struct file *filp, |
| 166 | unsigned int cmd, void __user *argp) |
| 167 | { |
| 168 | struct inode *cpfile = NILFS_SB(inode->i_sb)->s_nilfs->ns_cpfile; |
| 169 | struct nilfs_cpstat cpstat; |
| 170 | struct nilfs_transaction_info ti; |
| 171 | int ret; |
| 172 | |
| 173 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 174 | ret = nilfs_cpfile_get_stat(cpfile, &cpstat); |
| 175 | nilfs_transaction_end(inode->i_sb, 0); |
| 176 | if (ret < 0) |
| 177 | return ret; |
| 178 | |
| 179 | if (copy_to_user(argp, &cpstat, sizeof(cpstat))) |
| 180 | ret = -EFAULT; |
| 181 | return ret; |
| 182 | } |
| 183 | |
| 184 | static ssize_t |
| 185 | nilfs_ioctl_do_get_suinfo(struct the_nilfs *nilfs, int index, int flags, |
| 186 | void *buf, size_t size, size_t nmembs) |
| 187 | { |
| 188 | return nilfs_sufile_get_suinfo(nilfs->ns_sufile, index, buf, nmembs); |
| 189 | } |
| 190 | |
| 191 | static int nilfs_ioctl_get_suinfo(struct inode *inode, struct file *filp, |
| 192 | unsigned int cmd, void __user *argp) |
| 193 | { |
| 194 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
| 195 | struct nilfs_argv argv; |
| 196 | struct nilfs_transaction_info ti; |
| 197 | int ret; |
| 198 | |
| 199 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 200 | return -EFAULT; |
| 201 | |
| 202 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 203 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
| 204 | nilfs_ioctl_do_get_suinfo); |
| 205 | nilfs_transaction_end(inode->i_sb, 0); |
| 206 | |
| 207 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 208 | ret = -EFAULT; |
| 209 | return ret; |
| 210 | } |
| 211 | |
| 212 | static int nilfs_ioctl_get_sustat(struct inode *inode, struct file *filp, |
| 213 | unsigned int cmd, void __user *argp) |
| 214 | { |
| 215 | struct inode *sufile = NILFS_SB(inode->i_sb)->s_nilfs->ns_sufile; |
| 216 | struct nilfs_sustat sustat; |
| 217 | struct nilfs_transaction_info ti; |
| 218 | int ret; |
| 219 | |
| 220 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 221 | ret = nilfs_sufile_get_stat(sufile, &sustat); |
| 222 | nilfs_transaction_end(inode->i_sb, 0); |
| 223 | if (ret < 0) |
| 224 | return ret; |
| 225 | |
| 226 | if (copy_to_user(argp, &sustat, sizeof(sustat))) |
| 227 | ret = -EFAULT; |
| 228 | return ret; |
| 229 | } |
| 230 | |
| 231 | static ssize_t |
| 232 | nilfs_ioctl_do_get_vinfo(struct the_nilfs *nilfs, int index, int flags, |
| 233 | void *buf, size_t size, size_t nmembs) |
| 234 | { |
| 235 | return nilfs_dat_get_vinfo(nilfs_dat_inode(nilfs), buf, nmembs); |
| 236 | } |
| 237 | |
| 238 | static int nilfs_ioctl_get_vinfo(struct inode *inode, struct file *filp, |
| 239 | unsigned int cmd, void __user *argp) |
| 240 | { |
| 241 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
| 242 | struct nilfs_argv argv; |
| 243 | struct nilfs_transaction_info ti; |
| 244 | int ret; |
| 245 | |
| 246 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 247 | return -EFAULT; |
| 248 | |
| 249 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 250 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
| 251 | nilfs_ioctl_do_get_vinfo); |
| 252 | nilfs_transaction_end(inode->i_sb, 0); |
| 253 | |
| 254 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 255 | ret = -EFAULT; |
| 256 | return ret; |
| 257 | } |
| 258 | |
| 259 | static ssize_t |
| 260 | nilfs_ioctl_do_get_bdescs(struct the_nilfs *nilfs, int index, int flags, |
| 261 | void *buf, size_t size, size_t nmembs) |
| 262 | { |
| 263 | struct inode *dat = nilfs_dat_inode(nilfs); |
| 264 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; |
| 265 | struct nilfs_bdesc *bdescs = buf; |
| 266 | int ret, i; |
| 267 | |
| 268 | for (i = 0; i < nmembs; i++) { |
| 269 | ret = nilfs_bmap_lookup_at_level(bmap, |
| 270 | bdescs[i].bd_offset, |
| 271 | bdescs[i].bd_level + 1, |
| 272 | &bdescs[i].bd_blocknr); |
| 273 | if (ret < 0) { |
| 274 | if (ret != -ENOENT) |
| 275 | return ret; |
| 276 | bdescs[i].bd_blocknr = 0; |
| 277 | } |
| 278 | } |
| 279 | return nmembs; |
| 280 | } |
| 281 | |
| 282 | static int nilfs_ioctl_get_bdescs(struct inode *inode, struct file *filp, |
| 283 | unsigned int cmd, void __user *argp) |
| 284 | { |
| 285 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
| 286 | struct nilfs_argv argv; |
| 287 | struct nilfs_transaction_info ti; |
| 288 | int ret; |
| 289 | |
| 290 | if (copy_from_user(&argv, argp, sizeof(argv))) |
| 291 | return -EFAULT; |
| 292 | |
| 293 | nilfs_transaction_begin(inode->i_sb, &ti, 0); |
| 294 | ret = nilfs_ioctl_wrap_copy(nilfs, &argv, _IOC_DIR(cmd), |
| 295 | nilfs_ioctl_do_get_bdescs); |
| 296 | nilfs_transaction_end(inode->i_sb, 0); |
| 297 | |
| 298 | if (copy_to_user(argp, &argv, sizeof(argv))) |
| 299 | ret = -EFAULT; |
| 300 | return ret; |
| 301 | } |
| 302 | |
| 303 | static int nilfs_ioctl_move_inode_block(struct inode *inode, |
| 304 | struct nilfs_vdesc *vdesc, |
| 305 | struct list_head *buffers) |
| 306 | { |
| 307 | struct buffer_head *bh; |
| 308 | int ret; |
| 309 | |
| 310 | if (vdesc->vd_flags == 0) |
| 311 | ret = nilfs_gccache_submit_read_data( |
| 312 | inode, vdesc->vd_offset, vdesc->vd_blocknr, |
| 313 | vdesc->vd_vblocknr, &bh); |
| 314 | else |
| 315 | ret = nilfs_gccache_submit_read_node( |
| 316 | inode, vdesc->vd_blocknr, vdesc->vd_vblocknr, &bh); |
| 317 | |
| 318 | if (unlikely(ret < 0)) { |
| 319 | if (ret == -ENOENT) |
| 320 | printk(KERN_CRIT |
| 321 | "%s: invalid virtual block address (%s): " |
| 322 | "ino=%llu, cno=%llu, offset=%llu, " |
| 323 | "blocknr=%llu, vblocknr=%llu\n", |
| 324 | __func__, vdesc->vd_flags ? "node" : "data", |
| 325 | (unsigned long long)vdesc->vd_ino, |
| 326 | (unsigned long long)vdesc->vd_cno, |
| 327 | (unsigned long long)vdesc->vd_offset, |
| 328 | (unsigned long long)vdesc->vd_blocknr, |
| 329 | (unsigned long long)vdesc->vd_vblocknr); |
| 330 | return ret; |
| 331 | } |
| 332 | bh->b_private = vdesc; |
| 333 | list_add_tail(&bh->b_assoc_buffers, buffers); |
| 334 | return 0; |
| 335 | } |
| 336 | |
| 337 | static ssize_t |
| 338 | nilfs_ioctl_do_move_blocks(struct the_nilfs *nilfs, int index, int flags, |
| 339 | void *buf, size_t size, size_t nmembs) |
| 340 | { |
| 341 | struct inode *inode; |
| 342 | struct nilfs_vdesc *vdesc; |
| 343 | struct buffer_head *bh, *n; |
| 344 | LIST_HEAD(buffers); |
| 345 | ino_t ino; |
| 346 | __u64 cno; |
| 347 | int i, ret; |
| 348 | |
| 349 | for (i = 0, vdesc = buf; i < nmembs; ) { |
| 350 | ino = vdesc->vd_ino; |
| 351 | cno = vdesc->vd_cno; |
| 352 | inode = nilfs_gc_iget(nilfs, ino, cno); |
| 353 | if (unlikely(inode == NULL)) { |
| 354 | ret = -ENOMEM; |
| 355 | goto failed; |
| 356 | } |
| 357 | do { |
| 358 | ret = nilfs_ioctl_move_inode_block(inode, vdesc, |
| 359 | &buffers); |
| 360 | if (unlikely(ret < 0)) |
| 361 | goto failed; |
| 362 | vdesc++; |
| 363 | } while (++i < nmembs && |
| 364 | vdesc->vd_ino == ino && vdesc->vd_cno == cno); |
| 365 | } |
| 366 | |
| 367 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { |
| 368 | ret = nilfs_gccache_wait_and_mark_dirty(bh); |
| 369 | if (unlikely(ret < 0)) { |
| 370 | if (ret == -EEXIST) { |
| 371 | vdesc = bh->b_private; |
| 372 | printk(KERN_CRIT |
| 373 | "%s: conflicting %s buffer: " |
| 374 | "ino=%llu, cno=%llu, offset=%llu, " |
| 375 | "blocknr=%llu, vblocknr=%llu\n", |
| 376 | __func__, |
| 377 | vdesc->vd_flags ? "node" : "data", |
| 378 | (unsigned long long)vdesc->vd_ino, |
| 379 | (unsigned long long)vdesc->vd_cno, |
| 380 | (unsigned long long)vdesc->vd_offset, |
| 381 | (unsigned long long)vdesc->vd_blocknr, |
| 382 | (unsigned long long)vdesc->vd_vblocknr); |
| 383 | } |
| 384 | goto failed; |
| 385 | } |
| 386 | list_del_init(&bh->b_assoc_buffers); |
| 387 | bh->b_private = NULL; |
| 388 | brelse(bh); |
| 389 | } |
| 390 | return nmembs; |
| 391 | |
| 392 | failed: |
| 393 | list_for_each_entry_safe(bh, n, &buffers, b_assoc_buffers) { |
| 394 | list_del_init(&bh->b_assoc_buffers); |
| 395 | bh->b_private = NULL; |
| 396 | brelse(bh); |
| 397 | } |
| 398 | return ret; |
| 399 | } |
| 400 | |
| 401 | static inline int nilfs_ioctl_move_blocks(struct the_nilfs *nilfs, |
| 402 | struct nilfs_argv *argv, |
| 403 | int dir) |
| 404 | { |
| 405 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 406 | nilfs_ioctl_do_move_blocks); |
| 407 | } |
| 408 | |
| 409 | static ssize_t |
| 410 | nilfs_ioctl_do_delete_checkpoints(struct the_nilfs *nilfs, int index, |
| 411 | int flags, void *buf, size_t size, |
| 412 | size_t nmembs) |
| 413 | { |
| 414 | struct inode *cpfile = nilfs->ns_cpfile; |
| 415 | struct nilfs_period *periods = buf; |
| 416 | int ret, i; |
| 417 | |
| 418 | for (i = 0; i < nmembs; i++) { |
| 419 | ret = nilfs_cpfile_delete_checkpoints( |
| 420 | cpfile, periods[i].p_start, periods[i].p_end); |
| 421 | if (ret < 0) |
| 422 | return ret; |
| 423 | } |
| 424 | return nmembs; |
| 425 | } |
| 426 | |
| 427 | static inline int nilfs_ioctl_delete_checkpoints(struct the_nilfs *nilfs, |
| 428 | struct nilfs_argv *argv, |
| 429 | int dir) |
| 430 | { |
| 431 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 432 | nilfs_ioctl_do_delete_checkpoints); |
| 433 | } |
| 434 | |
| 435 | static ssize_t |
| 436 | nilfs_ioctl_do_free_vblocknrs(struct the_nilfs *nilfs, int index, int flags, |
| 437 | void *buf, size_t size, size_t nmembs) |
| 438 | { |
| 439 | int ret = nilfs_dat_freev(nilfs_dat_inode(nilfs), buf, nmembs); |
| 440 | |
| 441 | return (ret < 0) ? ret : nmembs; |
| 442 | } |
| 443 | |
| 444 | static inline int nilfs_ioctl_free_vblocknrs(struct the_nilfs *nilfs, |
| 445 | struct nilfs_argv *argv, |
| 446 | int dir) |
| 447 | { |
| 448 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 449 | nilfs_ioctl_do_free_vblocknrs); |
| 450 | } |
| 451 | |
| 452 | static ssize_t |
| 453 | nilfs_ioctl_do_mark_blocks_dirty(struct the_nilfs *nilfs, int index, int flags, |
| 454 | void *buf, size_t size, size_t nmembs) |
| 455 | { |
| 456 | struct inode *dat = nilfs_dat_inode(nilfs); |
| 457 | struct nilfs_bmap *bmap = NILFS_I(dat)->i_bmap; |
| 458 | struct nilfs_bdesc *bdescs = buf; |
| 459 | int ret, i; |
| 460 | |
| 461 | for (i = 0; i < nmembs; i++) { |
| 462 | /* XXX: use macro or inline func to check liveness */ |
| 463 | ret = nilfs_bmap_lookup_at_level(bmap, |
| 464 | bdescs[i].bd_offset, |
| 465 | bdescs[i].bd_level + 1, |
| 466 | &bdescs[i].bd_blocknr); |
| 467 | if (ret < 0) { |
| 468 | if (ret != -ENOENT) |
| 469 | return ret; |
| 470 | bdescs[i].bd_blocknr = 0; |
| 471 | } |
| 472 | if (bdescs[i].bd_blocknr != bdescs[i].bd_oblocknr) |
| 473 | /* skip dead block */ |
| 474 | continue; |
| 475 | if (bdescs[i].bd_level == 0) { |
| 476 | ret = nilfs_mdt_mark_block_dirty(dat, |
| 477 | bdescs[i].bd_offset); |
| 478 | if (ret < 0) { |
| 479 | BUG_ON(ret == -ENOENT); |
| 480 | return ret; |
| 481 | } |
| 482 | } else { |
| 483 | ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset, |
| 484 | bdescs[i].bd_level); |
| 485 | if (ret < 0) { |
| 486 | BUG_ON(ret == -ENOENT); |
| 487 | return ret; |
| 488 | } |
| 489 | } |
| 490 | } |
| 491 | return nmembs; |
| 492 | } |
| 493 | |
| 494 | static inline int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs, |
| 495 | struct nilfs_argv *argv, |
| 496 | int dir) |
| 497 | { |
| 498 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 499 | nilfs_ioctl_do_mark_blocks_dirty); |
| 500 | } |
| 501 | |
| 502 | static ssize_t |
| 503 | nilfs_ioctl_do_free_segments(struct the_nilfs *nilfs, int index, int flags, |
| 504 | void *buf, size_t size, size_t nmembs) |
| 505 | { |
| 506 | struct nilfs_sb_info *sbi = nilfs_get_writer(nilfs); |
| 507 | int ret; |
| 508 | |
| 509 | BUG_ON(!sbi); |
| 510 | ret = nilfs_segctor_add_segments_to_be_freed( |
| 511 | NILFS_SC(sbi), buf, nmembs); |
| 512 | nilfs_put_writer(nilfs); |
| 513 | |
| 514 | return (ret < 0) ? ret : nmembs; |
| 515 | } |
| 516 | |
| 517 | static inline int nilfs_ioctl_free_segments(struct the_nilfs *nilfs, |
| 518 | struct nilfs_argv *argv, |
| 519 | int dir) |
| 520 | { |
| 521 | return nilfs_ioctl_wrap_copy(nilfs, argv, dir, |
| 522 | nilfs_ioctl_do_free_segments); |
| 523 | } |
| 524 | |
| 525 | int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *nilfs, |
| 526 | void __user *argp) |
| 527 | { |
| 528 | struct nilfs_argv argv[5]; |
| 529 | int dir, ret; |
| 530 | |
| 531 | if (copy_from_user(argv, argp, sizeof(argv))) |
| 532 | return -EFAULT; |
| 533 | |
| 534 | dir = _IOC_WRITE; |
| 535 | ret = nilfs_ioctl_move_blocks(nilfs, &argv[0], dir); |
| 536 | if (ret < 0) |
| 537 | goto out_move_blks; |
| 538 | ret = nilfs_ioctl_delete_checkpoints(nilfs, &argv[1], dir); |
| 539 | if (ret < 0) |
| 540 | goto out_del_cps; |
| 541 | ret = nilfs_ioctl_free_vblocknrs(nilfs, &argv[2], dir); |
| 542 | if (ret < 0) |
| 543 | goto out_free_vbns; |
| 544 | ret = nilfs_ioctl_mark_blocks_dirty(nilfs, &argv[3], dir); |
| 545 | if (ret < 0) |
| 546 | goto out_free_vbns; |
| 547 | ret = nilfs_ioctl_free_segments(nilfs, &argv[4], dir); |
| 548 | if (ret < 0) |
| 549 | goto out_free_segs; |
| 550 | |
| 551 | return 0; |
| 552 | |
| 553 | out_free_segs: |
| 554 | BUG(); /* XXX: not implemented yet */ |
| 555 | out_free_vbns: |
| 556 | BUG();/* XXX: not implemented yet */ |
| 557 | out_del_cps: |
| 558 | BUG();/* XXX: not implemented yet */ |
| 559 | out_move_blks: |
| 560 | nilfs_remove_all_gcinode(nilfs); |
| 561 | return ret; |
| 562 | } |
| 563 | |
| 564 | static int nilfs_ioctl_clean_segments(struct inode *inode, struct file *filp, |
| 565 | unsigned int cmd, void __user *argp) |
| 566 | { |
| 567 | int ret; |
| 568 | |
| 569 | if (!capable(CAP_SYS_ADMIN)) |
| 570 | return -EPERM; |
| 571 | |
| 572 | ret = nilfs_clean_segments(inode->i_sb, argp); |
| 573 | clear_nilfs_cond_nongc_write(NILFS_SB(inode->i_sb)->s_nilfs); |
| 574 | return ret; |
| 575 | } |
| 576 | |
| 577 | static int nilfs_ioctl_test_cond(struct the_nilfs *nilfs, int cond) |
| 578 | { |
| 579 | return (cond & NILFS_TIMEDWAIT_SEG_WRITE) && |
| 580 | nilfs_cond_nongc_write(nilfs); |
| 581 | } |
| 582 | |
| 583 | static void nilfs_ioctl_clear_cond(struct the_nilfs *nilfs, int cond) |
| 584 | { |
| 585 | if (cond & NILFS_TIMEDWAIT_SEG_WRITE) |
| 586 | clear_nilfs_cond_nongc_write(nilfs); |
| 587 | } |
| 588 | |
| 589 | static int nilfs_ioctl_timedwait(struct inode *inode, struct file *filp, |
| 590 | unsigned int cmd, void __user *argp) |
| 591 | { |
| 592 | struct the_nilfs *nilfs = NILFS_SB(inode->i_sb)->s_nilfs; |
| 593 | struct nilfs_wait_cond wc; |
| 594 | long ret; |
| 595 | |
| 596 | if (!capable(CAP_SYS_ADMIN)) |
| 597 | return -EPERM; |
| 598 | if (copy_from_user(&wc, argp, sizeof(wc))) |
| 599 | return -EFAULT; |
| 600 | |
| 601 | unlock_kernel(); |
| 602 | ret = wc.wc_flags ? |
| 603 | wait_event_interruptible_timeout( |
| 604 | nilfs->ns_cleanerd_wq, |
| 605 | nilfs_ioctl_test_cond(nilfs, wc.wc_cond), |
| 606 | timespec_to_jiffies(&wc.wc_timeout)) : |
| 607 | wait_event_interruptible( |
| 608 | nilfs->ns_cleanerd_wq, |
| 609 | nilfs_ioctl_test_cond(nilfs, wc.wc_cond)); |
| 610 | lock_kernel(); |
| 611 | nilfs_ioctl_clear_cond(nilfs, wc.wc_cond); |
| 612 | |
| 613 | if (ret > 0) { |
| 614 | jiffies_to_timespec(ret, &wc.wc_timeout); |
| 615 | if (copy_to_user(argp, &wc, sizeof(wc))) |
| 616 | return -EFAULT; |
| 617 | return 0; |
| 618 | } |
| 619 | if (ret != 0) |
| 620 | return -EINTR; |
| 621 | |
| 622 | return wc.wc_flags ? -ETIME : 0; |
| 623 | } |
| 624 | |
| 625 | static int nilfs_ioctl_sync(struct inode *inode, struct file *filp, |
| 626 | unsigned int cmd, void __user *argp) |
| 627 | { |
| 628 | __u64 cno; |
| 629 | int ret; |
| 630 | |
| 631 | ret = nilfs_construct_segment(inode->i_sb); |
| 632 | if (ret < 0) |
| 633 | return ret; |
| 634 | |
| 635 | if (argp != NULL) { |
| 636 | cno = NILFS_SB(inode->i_sb)->s_nilfs->ns_cno - 1; |
| 637 | if (copy_to_user(argp, &cno, sizeof(cno))) |
| 638 | return -EFAULT; |
| 639 | } |
| 640 | return 0; |
| 641 | } |
| 642 | |
| 643 | int nilfs_ioctl(struct inode *inode, struct file *filp, unsigned int cmd, |
| 644 | unsigned long arg) |
| 645 | { |
| 646 | void __user *argp = (void * __user *)arg; |
| 647 | |
| 648 | switch (cmd) { |
| 649 | case NILFS_IOCTL_CHANGE_CPMODE: |
| 650 | return nilfs_ioctl_change_cpmode(inode, filp, cmd, argp); |
| 651 | case NILFS_IOCTL_DELETE_CHECKPOINT: |
| 652 | return nilfs_ioctl_delete_checkpoint(inode, filp, cmd, argp); |
| 653 | case NILFS_IOCTL_GET_CPINFO: |
| 654 | return nilfs_ioctl_get_cpinfo(inode, filp, cmd, argp); |
| 655 | case NILFS_IOCTL_GET_CPSTAT: |
| 656 | return nilfs_ioctl_get_cpstat(inode, filp, cmd, argp); |
| 657 | case NILFS_IOCTL_GET_SUINFO: |
| 658 | return nilfs_ioctl_get_suinfo(inode, filp, cmd, argp); |
| 659 | case NILFS_IOCTL_GET_SUSTAT: |
| 660 | return nilfs_ioctl_get_sustat(inode, filp, cmd, argp); |
| 661 | case NILFS_IOCTL_GET_VINFO: |
| 662 | /* XXX: rename to ??? */ |
| 663 | return nilfs_ioctl_get_vinfo(inode, filp, cmd, argp); |
| 664 | case NILFS_IOCTL_GET_BDESCS: |
| 665 | return nilfs_ioctl_get_bdescs(inode, filp, cmd, argp); |
| 666 | case NILFS_IOCTL_CLEAN_SEGMENTS: |
| 667 | return nilfs_ioctl_clean_segments(inode, filp, cmd, argp); |
| 668 | case NILFS_IOCTL_TIMEDWAIT: |
| 669 | return nilfs_ioctl_timedwait(inode, filp, cmd, argp); |
| 670 | case NILFS_IOCTL_SYNC: |
| 671 | return nilfs_ioctl_sync(inode, filp, cmd, argp); |
| 672 | default: |
| 673 | return -ENOTTY; |
| 674 | } |
| 675 | } |
| 676 | |
| 677 | /* compat_ioctl */ |
| 678 | #ifdef CONFIG_COMPAT |
| 679 | #include <linux/compat.h> |
| 680 | |
| 681 | static int nilfs_compat_locked_ioctl(struct inode *inode, struct file *filp, |
| 682 | unsigned int cmd, unsigned long arg) |
| 683 | { |
| 684 | int ret; |
| 685 | |
| 686 | lock_kernel(); |
| 687 | ret = nilfs_ioctl(inode, filp, cmd, arg); |
| 688 | unlock_kernel(); |
| 689 | return ret; |
| 690 | } |
| 691 | |
| 692 | static int |
| 693 | nilfs_compat_ioctl_uargv32_to_uargv(struct nilfs_argv32 __user *uargv32, |
| 694 | struct nilfs_argv __user *uargv) |
| 695 | { |
| 696 | compat_uptr_t base; |
| 697 | compat_size_t nmembs, size; |
| 698 | compat_int_t index, flags; |
| 699 | |
| 700 | if (get_user(base, &uargv32->v_base) || |
| 701 | put_user(compat_ptr(base), &uargv->v_base) || |
| 702 | get_user(nmembs, &uargv32->v_nmembs) || |
| 703 | put_user(nmembs, &uargv->v_nmembs) || |
| 704 | get_user(size, &uargv32->v_size) || |
| 705 | put_user(size, &uargv->v_size) || |
| 706 | get_user(index, &uargv32->v_index) || |
| 707 | put_user(index, &uargv->v_index) || |
| 708 | get_user(flags, &uargv32->v_flags) || |
| 709 | put_user(flags, &uargv->v_flags)) |
| 710 | return -EFAULT; |
| 711 | return 0; |
| 712 | } |
| 713 | |
| 714 | static int |
| 715 | nilfs_compat_ioctl_uargv_to_uargv32(struct nilfs_argv __user *uargv, |
| 716 | struct nilfs_argv32 __user *uargv32) |
| 717 | { |
| 718 | size_t nmembs; |
| 719 | |
| 720 | if (get_user(nmembs, &uargv->v_nmembs) || |
| 721 | put_user(nmembs, &uargv32->v_nmembs)) |
| 722 | return -EFAULT; |
| 723 | return 0; |
| 724 | } |
| 725 | |
| 726 | static int |
| 727 | nilfs_compat_ioctl_get_by_argv(struct inode *inode, struct file *filp, |
| 728 | unsigned int cmd, unsigned long arg) |
| 729 | { |
| 730 | struct nilfs_argv __user *uargv; |
| 731 | struct nilfs_argv32 __user *uargv32; |
| 732 | int ret; |
| 733 | |
| 734 | uargv = compat_alloc_user_space(sizeof(struct nilfs_argv)); |
| 735 | uargv32 = compat_ptr(arg); |
| 736 | ret = nilfs_compat_ioctl_uargv32_to_uargv(uargv32, uargv); |
| 737 | if (ret < 0) |
| 738 | return ret; |
| 739 | |
| 740 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, (unsigned long)uargv); |
| 741 | if (ret < 0) |
| 742 | return ret; |
| 743 | |
| 744 | return nilfs_compat_ioctl_uargv_to_uargv32(uargv, uargv32); |
| 745 | } |
| 746 | |
| 747 | static int |
| 748 | nilfs_compat_ioctl_change_cpmode(struct inode *inode, struct file *filp, |
| 749 | unsigned int cmd, unsigned long arg) |
| 750 | { |
| 751 | struct nilfs_cpmode __user *ucpmode; |
| 752 | struct nilfs_cpmode32 __user *ucpmode32; |
| 753 | int mode; |
| 754 | |
| 755 | ucpmode = compat_alloc_user_space(sizeof(struct nilfs_cpmode)); |
| 756 | ucpmode32 = compat_ptr(arg); |
| 757 | if (copy_in_user(&ucpmode->cm_cno, &ucpmode32->cm_cno, |
| 758 | sizeof(__u64)) || |
| 759 | get_user(mode, &ucpmode32->cm_mode) || |
| 760 | put_user(mode, &ucpmode->cm_mode)) |
| 761 | return -EFAULT; |
| 762 | |
| 763 | return nilfs_compat_locked_ioctl( |
| 764 | inode, filp, cmd, (unsigned long)ucpmode); |
| 765 | } |
| 766 | |
| 767 | |
| 768 | static inline int |
| 769 | nilfs_compat_ioctl_delete_checkpoint(struct inode *inode, struct file *filp, |
| 770 | unsigned int cmd, unsigned long arg) |
| 771 | { |
| 772 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); |
| 773 | } |
| 774 | |
| 775 | static inline int |
| 776 | nilfs_compat_ioctl_get_cpinfo(struct inode *inode, struct file *filp, |
| 777 | unsigned int cmd, unsigned long arg) |
| 778 | { |
| 779 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); |
| 780 | } |
| 781 | |
| 782 | static inline int |
| 783 | nilfs_compat_ioctl_get_cpstat(struct inode *inode, struct file *filp, |
| 784 | unsigned int cmd, unsigned long arg) |
| 785 | { |
| 786 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); |
| 787 | } |
| 788 | |
| 789 | static inline int |
| 790 | nilfs_compat_ioctl_get_suinfo(struct inode *inode, struct file *filp, |
| 791 | unsigned int cmd, unsigned long arg) |
| 792 | { |
| 793 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); |
| 794 | } |
| 795 | |
| 796 | static int |
| 797 | nilfs_compat_ioctl_get_sustat(struct inode *inode, struct file *filp, |
| 798 | unsigned int cmd, unsigned long arg) |
| 799 | { |
| 800 | struct nilfs_sustat __user *usustat; |
| 801 | struct nilfs_sustat32 __user *usustat32; |
| 802 | time_t ctime, nongc_ctime; |
| 803 | int ret; |
| 804 | |
| 805 | usustat = compat_alloc_user_space(sizeof(struct nilfs_sustat)); |
| 806 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, |
| 807 | (unsigned long)usustat); |
| 808 | if (ret < 0) |
| 809 | return ret; |
| 810 | |
| 811 | usustat32 = compat_ptr(arg); |
| 812 | if (copy_in_user(&usustat32->ss_nsegs, &usustat->ss_nsegs, |
| 813 | sizeof(__u64)) || |
| 814 | copy_in_user(&usustat32->ss_ncleansegs, &usustat->ss_ncleansegs, |
| 815 | sizeof(__u64)) || |
| 816 | copy_in_user(&usustat32->ss_ndirtysegs, &usustat->ss_ndirtysegs, |
| 817 | sizeof(__u64)) || |
| 818 | get_user(ctime, &usustat->ss_ctime) || |
| 819 | put_user(ctime, &usustat32->ss_ctime) || |
| 820 | get_user(nongc_ctime, &usustat->ss_nongc_ctime) || |
| 821 | put_user(nongc_ctime, &usustat32->ss_nongc_ctime)) |
| 822 | return -EFAULT; |
| 823 | return 0; |
| 824 | } |
| 825 | |
| 826 | static inline int |
| 827 | nilfs_compat_ioctl_get_vinfo(struct inode *inode, struct file *filp, |
| 828 | unsigned int cmd, unsigned long arg) |
| 829 | { |
| 830 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); |
| 831 | } |
| 832 | |
| 833 | static inline int |
| 834 | nilfs_compat_ioctl_get_bdescs(struct inode *inode, struct file *filp, |
| 835 | unsigned int cmd, unsigned long arg) |
| 836 | { |
| 837 | return nilfs_compat_ioctl_get_by_argv(inode, filp, cmd, arg); |
| 838 | } |
| 839 | |
| 840 | static int |
| 841 | nilfs_compat_ioctl_clean_segments(struct inode *inode, struct file *filp, |
| 842 | unsigned int cmd, unsigned long arg) |
| 843 | { |
| 844 | struct nilfs_argv __user *uargv; |
| 845 | struct nilfs_argv32 __user *uargv32; |
| 846 | int i, ret; |
| 847 | |
| 848 | uargv = compat_alloc_user_space(sizeof(struct nilfs_argv) * 5); |
| 849 | uargv32 = compat_ptr(arg); |
| 850 | for (i = 0; i < 5; i++) { |
| 851 | ret = nilfs_compat_ioctl_uargv32_to_uargv(&uargv32[i], |
| 852 | &uargv[i]); |
| 853 | if (ret < 0) |
| 854 | return ret; |
| 855 | } |
| 856 | return nilfs_compat_locked_ioctl( |
| 857 | inode, filp, cmd, (unsigned long)uargv); |
| 858 | } |
| 859 | |
| 860 | static int |
| 861 | nilfs_compat_ioctl_timedwait(struct inode *inode, struct file *filp, |
| 862 | unsigned int cmd, unsigned long arg) |
| 863 | { |
| 864 | struct nilfs_wait_cond __user *uwcond; |
| 865 | struct nilfs_wait_cond32 __user *uwcond32; |
| 866 | struct timespec ts; |
| 867 | int cond, flags, ret; |
| 868 | |
| 869 | uwcond = compat_alloc_user_space(sizeof(struct nilfs_wait_cond)); |
| 870 | uwcond32 = compat_ptr(arg); |
| 871 | if (get_user(cond, &uwcond32->wc_cond) || |
| 872 | put_user(cond, &uwcond->wc_cond) || |
| 873 | get_user(flags, &uwcond32->wc_flags) || |
| 874 | put_user(flags, &uwcond->wc_flags) || |
| 875 | get_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) || |
| 876 | get_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec) || |
| 877 | put_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) || |
| 878 | put_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec)) |
| 879 | return -EFAULT; |
| 880 | |
| 881 | ret = nilfs_compat_locked_ioctl(inode, filp, cmd, |
| 882 | (unsigned long)uwcond); |
| 883 | if (ret < 0) |
| 884 | return ret; |
| 885 | |
| 886 | if (get_user(ts.tv_sec, &uwcond->wc_timeout.tv_sec) || |
| 887 | get_user(ts.tv_nsec, &uwcond->wc_timeout.tv_nsec) || |
| 888 | put_user(ts.tv_sec, &uwcond32->wc_timeout.tv_sec) || |
| 889 | put_user(ts.tv_nsec, &uwcond32->wc_timeout.tv_nsec)) |
| 890 | return -EFAULT; |
| 891 | |
| 892 | return 0; |
| 893 | } |
| 894 | |
| 895 | static int nilfs_compat_ioctl_sync(struct inode *inode, struct file *filp, |
| 896 | unsigned int cmd, unsigned long arg) |
| 897 | { |
| 898 | return nilfs_compat_locked_ioctl(inode, filp, cmd, arg); |
| 899 | } |
| 900 | |
| 901 | long nilfs_compat_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
| 902 | { |
| 903 | struct inode *inode = filp->f_dentry->d_inode; |
| 904 | |
| 905 | switch (cmd) { |
| 906 | case NILFS_IOCTL32_CHANGE_CPMODE: |
| 907 | return nilfs_compat_ioctl_change_cpmode( |
| 908 | inode, filp, NILFS_IOCTL_CHANGE_CPMODE, arg); |
| 909 | case NILFS_IOCTL_DELETE_CHECKPOINT: |
| 910 | return nilfs_compat_ioctl_delete_checkpoint( |
| 911 | inode, filp, cmd, arg); |
| 912 | case NILFS_IOCTL32_GET_CPINFO: |
| 913 | return nilfs_compat_ioctl_get_cpinfo( |
| 914 | inode, filp, NILFS_IOCTL_GET_CPINFO, arg); |
| 915 | case NILFS_IOCTL_GET_CPSTAT: |
| 916 | return nilfs_compat_ioctl_get_cpstat(inode, filp, cmd, arg); |
| 917 | case NILFS_IOCTL32_GET_SUINFO: |
| 918 | return nilfs_compat_ioctl_get_suinfo( |
| 919 | inode, filp, NILFS_IOCTL_GET_SUINFO, arg); |
| 920 | case NILFS_IOCTL32_GET_SUSTAT: |
| 921 | return nilfs_compat_ioctl_get_sustat( |
| 922 | inode, filp, NILFS_IOCTL_GET_SUSTAT, arg); |
| 923 | case NILFS_IOCTL32_GET_VINFO: |
| 924 | return nilfs_compat_ioctl_get_vinfo( |
| 925 | inode, filp, NILFS_IOCTL_GET_VINFO, arg); |
| 926 | case NILFS_IOCTL32_GET_BDESCS: |
| 927 | return nilfs_compat_ioctl_get_bdescs( |
| 928 | inode, filp, NILFS_IOCTL_GET_BDESCS, arg); |
| 929 | case NILFS_IOCTL32_CLEAN_SEGMENTS: |
| 930 | return nilfs_compat_ioctl_clean_segments( |
| 931 | inode, filp, NILFS_IOCTL_CLEAN_SEGMENTS, arg); |
| 932 | case NILFS_IOCTL32_TIMEDWAIT: |
| 933 | return nilfs_compat_ioctl_timedwait( |
| 934 | inode, filp, NILFS_IOCTL_TIMEDWAIT, arg); |
| 935 | case NILFS_IOCTL_SYNC: |
| 936 | return nilfs_compat_ioctl_sync(inode, filp, cmd, arg); |
| 937 | default: |
| 938 | return -ENOIOCTLCMD; |
| 939 | } |
| 940 | } |
| 941 | #endif |