| 1 | /* |
| 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or |
| 6 | * modify it under the terms of the GNU General Public License as |
| 7 | * published by the Free Software Foundation. |
| 8 | * |
| 9 | * This program is distributed in the hope that it would be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this program; if not, write the Free Software Foundation, |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 17 | */ |
| 18 | #include "xfs.h" |
| 19 | #include "xfs_fs.h" |
| 20 | #include "xfs_log.h" |
| 21 | #include "xfs_trans.h" |
| 22 | #include "xfs_sb.h" |
| 23 | #include "xfs_ag.h" |
| 24 | #include "xfs_alloc.h" |
| 25 | #include "xfs_mount.h" |
| 26 | #include "xfs_bmap_btree.h" |
| 27 | #include "xfs_dinode.h" |
| 28 | #include "xfs_inode.h" |
| 29 | #include "xfs_ioctl.h" |
| 30 | #include "xfs_rtalloc.h" |
| 31 | #include "xfs_itable.h" |
| 32 | #include "xfs_error.h" |
| 33 | #include "xfs_attr.h" |
| 34 | #include "xfs_bmap.h" |
| 35 | #include "xfs_buf_item.h" |
| 36 | #include "xfs_utils.h" |
| 37 | #include "xfs_dfrag.h" |
| 38 | #include "xfs_fsops.h" |
| 39 | #include "xfs_vnodeops.h" |
| 40 | #include "xfs_discard.h" |
| 41 | #include "xfs_quota.h" |
| 42 | #include "xfs_inode_item.h" |
| 43 | #include "xfs_export.h" |
| 44 | #include "xfs_trace.h" |
| 45 | |
| 46 | #include <linux/capability.h> |
| 47 | #include <linux/dcache.h> |
| 48 | #include <linux/mount.h> |
| 49 | #include <linux/namei.h> |
| 50 | #include <linux/pagemap.h> |
| 51 | #include <linux/slab.h> |
| 52 | #include <linux/exportfs.h> |
| 53 | |
| 54 | /* |
| 55 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to |
| 56 | * a file or fs handle. |
| 57 | * |
| 58 | * XFS_IOC_PATH_TO_FSHANDLE |
| 59 | * returns fs handle for a mount point or path within that mount point |
| 60 | * XFS_IOC_FD_TO_HANDLE |
| 61 | * returns full handle for a FD opened in user space |
| 62 | * XFS_IOC_PATH_TO_HANDLE |
| 63 | * returns full handle for a path |
| 64 | */ |
| 65 | int |
| 66 | xfs_find_handle( |
| 67 | unsigned int cmd, |
| 68 | xfs_fsop_handlereq_t *hreq) |
| 69 | { |
| 70 | int hsize; |
| 71 | xfs_handle_t handle; |
| 72 | struct inode *inode; |
| 73 | struct file *file = NULL; |
| 74 | struct path path; |
| 75 | int error; |
| 76 | struct xfs_inode *ip; |
| 77 | |
| 78 | if (cmd == XFS_IOC_FD_TO_HANDLE) { |
| 79 | file = fget(hreq->fd); |
| 80 | if (!file) |
| 81 | return -EBADF; |
| 82 | inode = file->f_path.dentry->d_inode; |
| 83 | } else { |
| 84 | error = user_lpath((const char __user *)hreq->path, &path); |
| 85 | if (error) |
| 86 | return error; |
| 87 | inode = path.dentry->d_inode; |
| 88 | } |
| 89 | ip = XFS_I(inode); |
| 90 | |
| 91 | /* |
| 92 | * We can only generate handles for inodes residing on a XFS filesystem, |
| 93 | * and only for regular files, directories or symbolic links. |
| 94 | */ |
| 95 | error = -EINVAL; |
| 96 | if (inode->i_sb->s_magic != XFS_SB_MAGIC) |
| 97 | goto out_put; |
| 98 | |
| 99 | error = -EBADF; |
| 100 | if (!S_ISREG(inode->i_mode) && |
| 101 | !S_ISDIR(inode->i_mode) && |
| 102 | !S_ISLNK(inode->i_mode)) |
| 103 | goto out_put; |
| 104 | |
| 105 | |
| 106 | memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); |
| 107 | |
| 108 | if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { |
| 109 | /* |
| 110 | * This handle only contains an fsid, zero the rest. |
| 111 | */ |
| 112 | memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); |
| 113 | hsize = sizeof(xfs_fsid_t); |
| 114 | } else { |
| 115 | int lock_mode; |
| 116 | |
| 117 | lock_mode = xfs_ilock_map_shared(ip); |
| 118 | handle.ha_fid.fid_len = sizeof(xfs_fid_t) - |
| 119 | sizeof(handle.ha_fid.fid_len); |
| 120 | handle.ha_fid.fid_pad = 0; |
| 121 | handle.ha_fid.fid_gen = ip->i_d.di_gen; |
| 122 | handle.ha_fid.fid_ino = ip->i_ino; |
| 123 | xfs_iunlock_map_shared(ip, lock_mode); |
| 124 | |
| 125 | hsize = XFS_HSIZE(handle); |
| 126 | } |
| 127 | |
| 128 | error = -EFAULT; |
| 129 | if (copy_to_user(hreq->ohandle, &handle, hsize) || |
| 130 | copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) |
| 131 | goto out_put; |
| 132 | |
| 133 | error = 0; |
| 134 | |
| 135 | out_put: |
| 136 | if (cmd == XFS_IOC_FD_TO_HANDLE) |
| 137 | fput(file); |
| 138 | else |
| 139 | path_put(&path); |
| 140 | return error; |
| 141 | } |
| 142 | |
| 143 | /* |
| 144 | * No need to do permission checks on the various pathname components |
| 145 | * as the handle operations are privileged. |
| 146 | */ |
| 147 | STATIC int |
| 148 | xfs_handle_acceptable( |
| 149 | void *context, |
| 150 | struct dentry *dentry) |
| 151 | { |
| 152 | return 1; |
| 153 | } |
| 154 | |
| 155 | /* |
| 156 | * Convert userspace handle data into a dentry. |
| 157 | */ |
| 158 | struct dentry * |
| 159 | xfs_handle_to_dentry( |
| 160 | struct file *parfilp, |
| 161 | void __user *uhandle, |
| 162 | u32 hlen) |
| 163 | { |
| 164 | xfs_handle_t handle; |
| 165 | struct xfs_fid64 fid; |
| 166 | |
| 167 | /* |
| 168 | * Only allow handle opens under a directory. |
| 169 | */ |
| 170 | if (!S_ISDIR(parfilp->f_path.dentry->d_inode->i_mode)) |
| 171 | return ERR_PTR(-ENOTDIR); |
| 172 | |
| 173 | if (hlen != sizeof(xfs_handle_t)) |
| 174 | return ERR_PTR(-EINVAL); |
| 175 | if (copy_from_user(&handle, uhandle, hlen)) |
| 176 | return ERR_PTR(-EFAULT); |
| 177 | if (handle.ha_fid.fid_len != |
| 178 | sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) |
| 179 | return ERR_PTR(-EINVAL); |
| 180 | |
| 181 | memset(&fid, 0, sizeof(struct fid)); |
| 182 | fid.ino = handle.ha_fid.fid_ino; |
| 183 | fid.gen = handle.ha_fid.fid_gen; |
| 184 | |
| 185 | return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, |
| 186 | FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, |
| 187 | xfs_handle_acceptable, NULL); |
| 188 | } |
| 189 | |
| 190 | STATIC struct dentry * |
| 191 | xfs_handlereq_to_dentry( |
| 192 | struct file *parfilp, |
| 193 | xfs_fsop_handlereq_t *hreq) |
| 194 | { |
| 195 | return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); |
| 196 | } |
| 197 | |
| 198 | int |
| 199 | xfs_open_by_handle( |
| 200 | struct file *parfilp, |
| 201 | xfs_fsop_handlereq_t *hreq) |
| 202 | { |
| 203 | const struct cred *cred = current_cred(); |
| 204 | int error; |
| 205 | int fd; |
| 206 | int permflag; |
| 207 | struct file *filp; |
| 208 | struct inode *inode; |
| 209 | struct dentry *dentry; |
| 210 | fmode_t fmode; |
| 211 | |
| 212 | if (!capable(CAP_SYS_ADMIN)) |
| 213 | return -XFS_ERROR(EPERM); |
| 214 | |
| 215 | dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| 216 | if (IS_ERR(dentry)) |
| 217 | return PTR_ERR(dentry); |
| 218 | inode = dentry->d_inode; |
| 219 | |
| 220 | /* Restrict xfs_open_by_handle to directories & regular files. */ |
| 221 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
| 222 | error = -XFS_ERROR(EPERM); |
| 223 | goto out_dput; |
| 224 | } |
| 225 | |
| 226 | #if BITS_PER_LONG != 32 |
| 227 | hreq->oflags |= O_LARGEFILE; |
| 228 | #endif |
| 229 | |
| 230 | permflag = hreq->oflags; |
| 231 | fmode = OPEN_FMODE(permflag); |
| 232 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && |
| 233 | (fmode & FMODE_WRITE) && IS_APPEND(inode)) { |
| 234 | error = -XFS_ERROR(EPERM); |
| 235 | goto out_dput; |
| 236 | } |
| 237 | |
| 238 | if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
| 239 | error = -XFS_ERROR(EACCES); |
| 240 | goto out_dput; |
| 241 | } |
| 242 | |
| 243 | /* Can't write directories. */ |
| 244 | if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { |
| 245 | error = -XFS_ERROR(EISDIR); |
| 246 | goto out_dput; |
| 247 | } |
| 248 | |
| 249 | fd = get_unused_fd(); |
| 250 | if (fd < 0) { |
| 251 | error = fd; |
| 252 | goto out_dput; |
| 253 | } |
| 254 | |
| 255 | filp = dentry_open(dentry, mntget(parfilp->f_path.mnt), |
| 256 | hreq->oflags, cred); |
| 257 | if (IS_ERR(filp)) { |
| 258 | put_unused_fd(fd); |
| 259 | return PTR_ERR(filp); |
| 260 | } |
| 261 | |
| 262 | if (S_ISREG(inode->i_mode)) { |
| 263 | filp->f_flags |= O_NOATIME; |
| 264 | filp->f_mode |= FMODE_NOCMTIME; |
| 265 | } |
| 266 | |
| 267 | fd_install(fd, filp); |
| 268 | return fd; |
| 269 | |
| 270 | out_dput: |
| 271 | dput(dentry); |
| 272 | return error; |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * This is a copy from fs/namei.c:vfs_readlink(), except for removing it's |
| 277 | * unused first argument. |
| 278 | */ |
| 279 | STATIC int |
| 280 | do_readlink( |
| 281 | char __user *buffer, |
| 282 | int buflen, |
| 283 | const char *link) |
| 284 | { |
| 285 | int len; |
| 286 | |
| 287 | len = PTR_ERR(link); |
| 288 | if (IS_ERR(link)) |
| 289 | goto out; |
| 290 | |
| 291 | len = strlen(link); |
| 292 | if (len > (unsigned) buflen) |
| 293 | len = buflen; |
| 294 | if (copy_to_user(buffer, link, len)) |
| 295 | len = -EFAULT; |
| 296 | out: |
| 297 | return len; |
| 298 | } |
| 299 | |
| 300 | |
| 301 | int |
| 302 | xfs_readlink_by_handle( |
| 303 | struct file *parfilp, |
| 304 | xfs_fsop_handlereq_t *hreq) |
| 305 | { |
| 306 | struct dentry *dentry; |
| 307 | __u32 olen; |
| 308 | void *link; |
| 309 | int error; |
| 310 | |
| 311 | if (!capable(CAP_SYS_ADMIN)) |
| 312 | return -XFS_ERROR(EPERM); |
| 313 | |
| 314 | dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| 315 | if (IS_ERR(dentry)) |
| 316 | return PTR_ERR(dentry); |
| 317 | |
| 318 | /* Restrict this handle operation to symlinks only. */ |
| 319 | if (!S_ISLNK(dentry->d_inode->i_mode)) { |
| 320 | error = -XFS_ERROR(EINVAL); |
| 321 | goto out_dput; |
| 322 | } |
| 323 | |
| 324 | if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { |
| 325 | error = -XFS_ERROR(EFAULT); |
| 326 | goto out_dput; |
| 327 | } |
| 328 | |
| 329 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
| 330 | if (!link) { |
| 331 | error = -XFS_ERROR(ENOMEM); |
| 332 | goto out_dput; |
| 333 | } |
| 334 | |
| 335 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
| 336 | if (error) |
| 337 | goto out_kfree; |
| 338 | error = do_readlink(hreq->ohandle, olen, link); |
| 339 | if (error) |
| 340 | goto out_kfree; |
| 341 | |
| 342 | out_kfree: |
| 343 | kfree(link); |
| 344 | out_dput: |
| 345 | dput(dentry); |
| 346 | return error; |
| 347 | } |
| 348 | |
| 349 | STATIC int |
| 350 | xfs_fssetdm_by_handle( |
| 351 | struct file *parfilp, |
| 352 | void __user *arg) |
| 353 | { |
| 354 | int error; |
| 355 | struct fsdmidata fsd; |
| 356 | xfs_fsop_setdm_handlereq_t dmhreq; |
| 357 | struct dentry *dentry; |
| 358 | |
| 359 | if (!capable(CAP_MKNOD)) |
| 360 | return -XFS_ERROR(EPERM); |
| 361 | if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| 362 | return -XFS_ERROR(EFAULT); |
| 363 | |
| 364 | dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); |
| 365 | if (IS_ERR(dentry)) |
| 366 | return PTR_ERR(dentry); |
| 367 | |
| 368 | if (IS_IMMUTABLE(dentry->d_inode) || IS_APPEND(dentry->d_inode)) { |
| 369 | error = -XFS_ERROR(EPERM); |
| 370 | goto out; |
| 371 | } |
| 372 | |
| 373 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { |
| 374 | error = -XFS_ERROR(EFAULT); |
| 375 | goto out; |
| 376 | } |
| 377 | |
| 378 | error = -xfs_set_dmattrs(XFS_I(dentry->d_inode), fsd.fsd_dmevmask, |
| 379 | fsd.fsd_dmstate); |
| 380 | |
| 381 | out: |
| 382 | dput(dentry); |
| 383 | return error; |
| 384 | } |
| 385 | |
| 386 | STATIC int |
| 387 | xfs_attrlist_by_handle( |
| 388 | struct file *parfilp, |
| 389 | void __user *arg) |
| 390 | { |
| 391 | int error = -ENOMEM; |
| 392 | attrlist_cursor_kern_t *cursor; |
| 393 | xfs_fsop_attrlist_handlereq_t al_hreq; |
| 394 | struct dentry *dentry; |
| 395 | char *kbuf; |
| 396 | |
| 397 | if (!capable(CAP_SYS_ADMIN)) |
| 398 | return -XFS_ERROR(EPERM); |
| 399 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) |
| 400 | return -XFS_ERROR(EFAULT); |
| 401 | if (al_hreq.buflen > XATTR_LIST_MAX) |
| 402 | return -XFS_ERROR(EINVAL); |
| 403 | |
| 404 | /* |
| 405 | * Reject flags, only allow namespaces. |
| 406 | */ |
| 407 | if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) |
| 408 | return -XFS_ERROR(EINVAL); |
| 409 | |
| 410 | dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); |
| 411 | if (IS_ERR(dentry)) |
| 412 | return PTR_ERR(dentry); |
| 413 | |
| 414 | kbuf = kzalloc(al_hreq.buflen, GFP_KERNEL); |
| 415 | if (!kbuf) |
| 416 | goto out_dput; |
| 417 | |
| 418 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
| 419 | error = -xfs_attr_list(XFS_I(dentry->d_inode), kbuf, al_hreq.buflen, |
| 420 | al_hreq.flags, cursor); |
| 421 | if (error) |
| 422 | goto out_kfree; |
| 423 | |
| 424 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) |
| 425 | error = -EFAULT; |
| 426 | |
| 427 | out_kfree: |
| 428 | kfree(kbuf); |
| 429 | out_dput: |
| 430 | dput(dentry); |
| 431 | return error; |
| 432 | } |
| 433 | |
| 434 | int |
| 435 | xfs_attrmulti_attr_get( |
| 436 | struct inode *inode, |
| 437 | unsigned char *name, |
| 438 | unsigned char __user *ubuf, |
| 439 | __uint32_t *len, |
| 440 | __uint32_t flags) |
| 441 | { |
| 442 | unsigned char *kbuf; |
| 443 | int error = EFAULT; |
| 444 | |
| 445 | if (*len > XATTR_SIZE_MAX) |
| 446 | return EINVAL; |
| 447 | kbuf = kmem_zalloc(*len, KM_SLEEP | KM_MAYFAIL); |
| 448 | if (!kbuf) { |
| 449 | kbuf = kmem_zalloc_large(*len); |
| 450 | if (!kbuf) |
| 451 | return ENOMEM; |
| 452 | } |
| 453 | |
| 454 | error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); |
| 455 | if (error) |
| 456 | goto out_kfree; |
| 457 | |
| 458 | if (copy_to_user(ubuf, kbuf, *len)) |
| 459 | error = EFAULT; |
| 460 | |
| 461 | out_kfree: |
| 462 | if (is_vmalloc_addr(kbuf)) |
| 463 | kmem_free_large(kbuf); |
| 464 | else |
| 465 | kmem_free(kbuf); |
| 466 | return error; |
| 467 | } |
| 468 | |
| 469 | int |
| 470 | xfs_attrmulti_attr_set( |
| 471 | struct inode *inode, |
| 472 | unsigned char *name, |
| 473 | const unsigned char __user *ubuf, |
| 474 | __uint32_t len, |
| 475 | __uint32_t flags) |
| 476 | { |
| 477 | unsigned char *kbuf; |
| 478 | int error = EFAULT; |
| 479 | |
| 480 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 481 | return EPERM; |
| 482 | if (len > XATTR_SIZE_MAX) |
| 483 | return EINVAL; |
| 484 | |
| 485 | kbuf = memdup_user(ubuf, len); |
| 486 | if (IS_ERR(kbuf)) |
| 487 | return PTR_ERR(kbuf); |
| 488 | |
| 489 | error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
| 490 | |
| 491 | return error; |
| 492 | } |
| 493 | |
| 494 | int |
| 495 | xfs_attrmulti_attr_remove( |
| 496 | struct inode *inode, |
| 497 | unsigned char *name, |
| 498 | __uint32_t flags) |
| 499 | { |
| 500 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 501 | return EPERM; |
| 502 | return xfs_attr_remove(XFS_I(inode), name, flags); |
| 503 | } |
| 504 | |
| 505 | STATIC int |
| 506 | xfs_attrmulti_by_handle( |
| 507 | struct file *parfilp, |
| 508 | void __user *arg) |
| 509 | { |
| 510 | int error; |
| 511 | xfs_attr_multiop_t *ops; |
| 512 | xfs_fsop_attrmulti_handlereq_t am_hreq; |
| 513 | struct dentry *dentry; |
| 514 | unsigned int i, size; |
| 515 | unsigned char *attr_name; |
| 516 | |
| 517 | if (!capable(CAP_SYS_ADMIN)) |
| 518 | return -XFS_ERROR(EPERM); |
| 519 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) |
| 520 | return -XFS_ERROR(EFAULT); |
| 521 | |
| 522 | /* overflow check */ |
| 523 | if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) |
| 524 | return -E2BIG; |
| 525 | |
| 526 | dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); |
| 527 | if (IS_ERR(dentry)) |
| 528 | return PTR_ERR(dentry); |
| 529 | |
| 530 | error = E2BIG; |
| 531 | size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); |
| 532 | if (!size || size > 16 * PAGE_SIZE) |
| 533 | goto out_dput; |
| 534 | |
| 535 | ops = memdup_user(am_hreq.ops, size); |
| 536 | if (IS_ERR(ops)) { |
| 537 | error = PTR_ERR(ops); |
| 538 | goto out_dput; |
| 539 | } |
| 540 | |
| 541 | attr_name = kmalloc(MAXNAMELEN, GFP_KERNEL); |
| 542 | if (!attr_name) |
| 543 | goto out_kfree_ops; |
| 544 | |
| 545 | error = 0; |
| 546 | for (i = 0; i < am_hreq.opcount; i++) { |
| 547 | ops[i].am_error = strncpy_from_user((char *)attr_name, |
| 548 | ops[i].am_attrname, MAXNAMELEN); |
| 549 | if (ops[i].am_error == 0 || ops[i].am_error == MAXNAMELEN) |
| 550 | error = -ERANGE; |
| 551 | if (ops[i].am_error < 0) |
| 552 | break; |
| 553 | |
| 554 | switch (ops[i].am_opcode) { |
| 555 | case ATTR_OP_GET: |
| 556 | ops[i].am_error = xfs_attrmulti_attr_get( |
| 557 | dentry->d_inode, attr_name, |
| 558 | ops[i].am_attrvalue, &ops[i].am_length, |
| 559 | ops[i].am_flags); |
| 560 | break; |
| 561 | case ATTR_OP_SET: |
| 562 | ops[i].am_error = mnt_want_write_file(parfilp); |
| 563 | if (ops[i].am_error) |
| 564 | break; |
| 565 | ops[i].am_error = xfs_attrmulti_attr_set( |
| 566 | dentry->d_inode, attr_name, |
| 567 | ops[i].am_attrvalue, ops[i].am_length, |
| 568 | ops[i].am_flags); |
| 569 | mnt_drop_write_file(parfilp); |
| 570 | break; |
| 571 | case ATTR_OP_REMOVE: |
| 572 | ops[i].am_error = mnt_want_write_file(parfilp); |
| 573 | if (ops[i].am_error) |
| 574 | break; |
| 575 | ops[i].am_error = xfs_attrmulti_attr_remove( |
| 576 | dentry->d_inode, attr_name, |
| 577 | ops[i].am_flags); |
| 578 | mnt_drop_write_file(parfilp); |
| 579 | break; |
| 580 | default: |
| 581 | ops[i].am_error = EINVAL; |
| 582 | } |
| 583 | } |
| 584 | |
| 585 | if (copy_to_user(am_hreq.ops, ops, size)) |
| 586 | error = XFS_ERROR(EFAULT); |
| 587 | |
| 588 | kfree(attr_name); |
| 589 | out_kfree_ops: |
| 590 | kfree(ops); |
| 591 | out_dput: |
| 592 | dput(dentry); |
| 593 | return -error; |
| 594 | } |
| 595 | |
| 596 | int |
| 597 | xfs_ioc_space( |
| 598 | struct xfs_inode *ip, |
| 599 | struct inode *inode, |
| 600 | struct file *filp, |
| 601 | int ioflags, |
| 602 | unsigned int cmd, |
| 603 | xfs_flock64_t *bf) |
| 604 | { |
| 605 | int attr_flags = 0; |
| 606 | int error; |
| 607 | |
| 608 | /* |
| 609 | * Only allow the sys admin to reserve space unless |
| 610 | * unwritten extents are enabled. |
| 611 | */ |
| 612 | if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && |
| 613 | !capable(CAP_SYS_ADMIN)) |
| 614 | return -XFS_ERROR(EPERM); |
| 615 | |
| 616 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
| 617 | return -XFS_ERROR(EPERM); |
| 618 | |
| 619 | if (!(filp->f_mode & FMODE_WRITE)) |
| 620 | return -XFS_ERROR(EBADF); |
| 621 | |
| 622 | if (!S_ISREG(inode->i_mode)) |
| 623 | return -XFS_ERROR(EINVAL); |
| 624 | |
| 625 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 626 | attr_flags |= XFS_ATTR_NONBLOCK; |
| 627 | |
| 628 | if (filp->f_flags & O_DSYNC) |
| 629 | attr_flags |= XFS_ATTR_SYNC; |
| 630 | |
| 631 | if (ioflags & IO_INVIS) |
| 632 | attr_flags |= XFS_ATTR_DMI; |
| 633 | |
| 634 | error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags); |
| 635 | return -error; |
| 636 | } |
| 637 | |
| 638 | STATIC int |
| 639 | xfs_ioc_bulkstat( |
| 640 | xfs_mount_t *mp, |
| 641 | unsigned int cmd, |
| 642 | void __user *arg) |
| 643 | { |
| 644 | xfs_fsop_bulkreq_t bulkreq; |
| 645 | int count; /* # of records returned */ |
| 646 | xfs_ino_t inlast; /* last inode number */ |
| 647 | int done; |
| 648 | int error; |
| 649 | |
| 650 | /* done = 1 if there are more stats to get and if bulkstat */ |
| 651 | /* should be called again (unused here, but used in dmapi) */ |
| 652 | |
| 653 | if (!capable(CAP_SYS_ADMIN)) |
| 654 | return -EPERM; |
| 655 | |
| 656 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 657 | return -XFS_ERROR(EIO); |
| 658 | |
| 659 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) |
| 660 | return -XFS_ERROR(EFAULT); |
| 661 | |
| 662 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) |
| 663 | return -XFS_ERROR(EFAULT); |
| 664 | |
| 665 | if ((count = bulkreq.icount) <= 0) |
| 666 | return -XFS_ERROR(EINVAL); |
| 667 | |
| 668 | if (bulkreq.ubuffer == NULL) |
| 669 | return -XFS_ERROR(EINVAL); |
| 670 | |
| 671 | if (cmd == XFS_IOC_FSINUMBERS) |
| 672 | error = xfs_inumbers(mp, &inlast, &count, |
| 673 | bulkreq.ubuffer, xfs_inumbers_fmt); |
| 674 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
| 675 | error = xfs_bulkstat_single(mp, &inlast, |
| 676 | bulkreq.ubuffer, &done); |
| 677 | else /* XFS_IOC_FSBULKSTAT */ |
| 678 | error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, |
| 679 | sizeof(xfs_bstat_t), bulkreq.ubuffer, |
| 680 | &done); |
| 681 | |
| 682 | if (error) |
| 683 | return -error; |
| 684 | |
| 685 | if (bulkreq.ocount != NULL) { |
| 686 | if (copy_to_user(bulkreq.lastip, &inlast, |
| 687 | sizeof(xfs_ino_t))) |
| 688 | return -XFS_ERROR(EFAULT); |
| 689 | |
| 690 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) |
| 691 | return -XFS_ERROR(EFAULT); |
| 692 | } |
| 693 | |
| 694 | return 0; |
| 695 | } |
| 696 | |
| 697 | STATIC int |
| 698 | xfs_ioc_fsgeometry_v1( |
| 699 | xfs_mount_t *mp, |
| 700 | void __user *arg) |
| 701 | { |
| 702 | xfs_fsop_geom_t fsgeo; |
| 703 | int error; |
| 704 | |
| 705 | error = xfs_fs_geometry(mp, &fsgeo, 3); |
| 706 | if (error) |
| 707 | return -error; |
| 708 | |
| 709 | /* |
| 710 | * Caller should have passed an argument of type |
| 711 | * xfs_fsop_geom_v1_t. This is a proper subset of the |
| 712 | * xfs_fsop_geom_t that xfs_fs_geometry() fills in. |
| 713 | */ |
| 714 | if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) |
| 715 | return -XFS_ERROR(EFAULT); |
| 716 | return 0; |
| 717 | } |
| 718 | |
| 719 | STATIC int |
| 720 | xfs_ioc_fsgeometry( |
| 721 | xfs_mount_t *mp, |
| 722 | void __user *arg) |
| 723 | { |
| 724 | xfs_fsop_geom_t fsgeo; |
| 725 | int error; |
| 726 | |
| 727 | error = xfs_fs_geometry(mp, &fsgeo, 4); |
| 728 | if (error) |
| 729 | return -error; |
| 730 | |
| 731 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| 732 | return -XFS_ERROR(EFAULT); |
| 733 | return 0; |
| 734 | } |
| 735 | |
| 736 | /* |
| 737 | * Linux extended inode flags interface. |
| 738 | */ |
| 739 | |
| 740 | STATIC unsigned int |
| 741 | xfs_merge_ioc_xflags( |
| 742 | unsigned int flags, |
| 743 | unsigned int start) |
| 744 | { |
| 745 | unsigned int xflags = start; |
| 746 | |
| 747 | if (flags & FS_IMMUTABLE_FL) |
| 748 | xflags |= XFS_XFLAG_IMMUTABLE; |
| 749 | else |
| 750 | xflags &= ~XFS_XFLAG_IMMUTABLE; |
| 751 | if (flags & FS_APPEND_FL) |
| 752 | xflags |= XFS_XFLAG_APPEND; |
| 753 | else |
| 754 | xflags &= ~XFS_XFLAG_APPEND; |
| 755 | if (flags & FS_SYNC_FL) |
| 756 | xflags |= XFS_XFLAG_SYNC; |
| 757 | else |
| 758 | xflags &= ~XFS_XFLAG_SYNC; |
| 759 | if (flags & FS_NOATIME_FL) |
| 760 | xflags |= XFS_XFLAG_NOATIME; |
| 761 | else |
| 762 | xflags &= ~XFS_XFLAG_NOATIME; |
| 763 | if (flags & FS_NODUMP_FL) |
| 764 | xflags |= XFS_XFLAG_NODUMP; |
| 765 | else |
| 766 | xflags &= ~XFS_XFLAG_NODUMP; |
| 767 | |
| 768 | return xflags; |
| 769 | } |
| 770 | |
| 771 | STATIC unsigned int |
| 772 | xfs_di2lxflags( |
| 773 | __uint16_t di_flags) |
| 774 | { |
| 775 | unsigned int flags = 0; |
| 776 | |
| 777 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
| 778 | flags |= FS_IMMUTABLE_FL; |
| 779 | if (di_flags & XFS_DIFLAG_APPEND) |
| 780 | flags |= FS_APPEND_FL; |
| 781 | if (di_flags & XFS_DIFLAG_SYNC) |
| 782 | flags |= FS_SYNC_FL; |
| 783 | if (di_flags & XFS_DIFLAG_NOATIME) |
| 784 | flags |= FS_NOATIME_FL; |
| 785 | if (di_flags & XFS_DIFLAG_NODUMP) |
| 786 | flags |= FS_NODUMP_FL; |
| 787 | return flags; |
| 788 | } |
| 789 | |
| 790 | STATIC int |
| 791 | xfs_ioc_fsgetxattr( |
| 792 | xfs_inode_t *ip, |
| 793 | int attr, |
| 794 | void __user *arg) |
| 795 | { |
| 796 | struct fsxattr fa; |
| 797 | |
| 798 | memset(&fa, 0, sizeof(struct fsxattr)); |
| 799 | |
| 800 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 801 | fa.fsx_xflags = xfs_ip2xflags(ip); |
| 802 | fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; |
| 803 | fa.fsx_projid = xfs_get_projid(ip); |
| 804 | |
| 805 | if (attr) { |
| 806 | if (ip->i_afp) { |
| 807 | if (ip->i_afp->if_flags & XFS_IFEXTENTS) |
| 808 | fa.fsx_nextents = ip->i_afp->if_bytes / |
| 809 | sizeof(xfs_bmbt_rec_t); |
| 810 | else |
| 811 | fa.fsx_nextents = ip->i_d.di_anextents; |
| 812 | } else |
| 813 | fa.fsx_nextents = 0; |
| 814 | } else { |
| 815 | if (ip->i_df.if_flags & XFS_IFEXTENTS) |
| 816 | fa.fsx_nextents = ip->i_df.if_bytes / |
| 817 | sizeof(xfs_bmbt_rec_t); |
| 818 | else |
| 819 | fa.fsx_nextents = ip->i_d.di_nextents; |
| 820 | } |
| 821 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 822 | |
| 823 | if (copy_to_user(arg, &fa, sizeof(fa))) |
| 824 | return -EFAULT; |
| 825 | return 0; |
| 826 | } |
| 827 | |
| 828 | STATIC void |
| 829 | xfs_set_diflags( |
| 830 | struct xfs_inode *ip, |
| 831 | unsigned int xflags) |
| 832 | { |
| 833 | unsigned int di_flags; |
| 834 | |
| 835 | /* can't set PREALLOC this way, just preserve it */ |
| 836 | di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); |
| 837 | if (xflags & XFS_XFLAG_IMMUTABLE) |
| 838 | di_flags |= XFS_DIFLAG_IMMUTABLE; |
| 839 | if (xflags & XFS_XFLAG_APPEND) |
| 840 | di_flags |= XFS_DIFLAG_APPEND; |
| 841 | if (xflags & XFS_XFLAG_SYNC) |
| 842 | di_flags |= XFS_DIFLAG_SYNC; |
| 843 | if (xflags & XFS_XFLAG_NOATIME) |
| 844 | di_flags |= XFS_DIFLAG_NOATIME; |
| 845 | if (xflags & XFS_XFLAG_NODUMP) |
| 846 | di_flags |= XFS_DIFLAG_NODUMP; |
| 847 | if (xflags & XFS_XFLAG_PROJINHERIT) |
| 848 | di_flags |= XFS_DIFLAG_PROJINHERIT; |
| 849 | if (xflags & XFS_XFLAG_NODEFRAG) |
| 850 | di_flags |= XFS_DIFLAG_NODEFRAG; |
| 851 | if (xflags & XFS_XFLAG_FILESTREAM) |
| 852 | di_flags |= XFS_DIFLAG_FILESTREAM; |
| 853 | if (S_ISDIR(ip->i_d.di_mode)) { |
| 854 | if (xflags & XFS_XFLAG_RTINHERIT) |
| 855 | di_flags |= XFS_DIFLAG_RTINHERIT; |
| 856 | if (xflags & XFS_XFLAG_NOSYMLINKS) |
| 857 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
| 858 | if (xflags & XFS_XFLAG_EXTSZINHERIT) |
| 859 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
| 860 | } else if (S_ISREG(ip->i_d.di_mode)) { |
| 861 | if (xflags & XFS_XFLAG_REALTIME) |
| 862 | di_flags |= XFS_DIFLAG_REALTIME; |
| 863 | if (xflags & XFS_XFLAG_EXTSIZE) |
| 864 | di_flags |= XFS_DIFLAG_EXTSIZE; |
| 865 | } |
| 866 | |
| 867 | ip->i_d.di_flags = di_flags; |
| 868 | } |
| 869 | |
| 870 | STATIC void |
| 871 | xfs_diflags_to_linux( |
| 872 | struct xfs_inode *ip) |
| 873 | { |
| 874 | struct inode *inode = VFS_I(ip); |
| 875 | unsigned int xflags = xfs_ip2xflags(ip); |
| 876 | |
| 877 | if (xflags & XFS_XFLAG_IMMUTABLE) |
| 878 | inode->i_flags |= S_IMMUTABLE; |
| 879 | else |
| 880 | inode->i_flags &= ~S_IMMUTABLE; |
| 881 | if (xflags & XFS_XFLAG_APPEND) |
| 882 | inode->i_flags |= S_APPEND; |
| 883 | else |
| 884 | inode->i_flags &= ~S_APPEND; |
| 885 | if (xflags & XFS_XFLAG_SYNC) |
| 886 | inode->i_flags |= S_SYNC; |
| 887 | else |
| 888 | inode->i_flags &= ~S_SYNC; |
| 889 | if (xflags & XFS_XFLAG_NOATIME) |
| 890 | inode->i_flags |= S_NOATIME; |
| 891 | else |
| 892 | inode->i_flags &= ~S_NOATIME; |
| 893 | } |
| 894 | |
| 895 | #define FSX_PROJID 1 |
| 896 | #define FSX_EXTSIZE 2 |
| 897 | #define FSX_XFLAGS 4 |
| 898 | #define FSX_NONBLOCK 8 |
| 899 | |
| 900 | STATIC int |
| 901 | xfs_ioctl_setattr( |
| 902 | xfs_inode_t *ip, |
| 903 | struct fsxattr *fa, |
| 904 | int mask) |
| 905 | { |
| 906 | struct xfs_mount *mp = ip->i_mount; |
| 907 | struct xfs_trans *tp; |
| 908 | unsigned int lock_flags = 0; |
| 909 | struct xfs_dquot *udqp = NULL; |
| 910 | struct xfs_dquot *gdqp = NULL; |
| 911 | struct xfs_dquot *olddquot = NULL; |
| 912 | int code; |
| 913 | |
| 914 | trace_xfs_ioctl_setattr(ip); |
| 915 | |
| 916 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 917 | return XFS_ERROR(EROFS); |
| 918 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 919 | return XFS_ERROR(EIO); |
| 920 | |
| 921 | /* |
| 922 | * Disallow 32bit project ids when projid32bit feature is not enabled. |
| 923 | */ |
| 924 | if ((mask & FSX_PROJID) && (fa->fsx_projid > (__uint16_t)-1) && |
| 925 | !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) |
| 926 | return XFS_ERROR(EINVAL); |
| 927 | |
| 928 | /* |
| 929 | * If disk quotas is on, we make sure that the dquots do exist on disk, |
| 930 | * before we start any other transactions. Trying to do this later |
| 931 | * is messy. We don't care to take a readlock to look at the ids |
| 932 | * in inode here, because we can't hold it across the trans_reserve. |
| 933 | * If the IDs do change before we take the ilock, we're covered |
| 934 | * because the i_*dquot fields will get updated anyway. |
| 935 | */ |
| 936 | if (XFS_IS_QUOTA_ON(mp) && (mask & FSX_PROJID)) { |
| 937 | code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, |
| 938 | ip->i_d.di_gid, fa->fsx_projid, |
| 939 | XFS_QMOPT_PQUOTA, &udqp, &gdqp); |
| 940 | if (code) |
| 941 | return code; |
| 942 | } |
| 943 | |
| 944 | /* |
| 945 | * For the other attributes, we acquire the inode lock and |
| 946 | * first do an error checking pass. |
| 947 | */ |
| 948 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
| 949 | code = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0); |
| 950 | if (code) |
| 951 | goto error_return; |
| 952 | |
| 953 | lock_flags = XFS_ILOCK_EXCL; |
| 954 | xfs_ilock(ip, lock_flags); |
| 955 | |
| 956 | /* |
| 957 | * CAP_FOWNER overrides the following restrictions: |
| 958 | * |
| 959 | * The user ID of the calling process must be equal |
| 960 | * to the file owner ID, except in cases where the |
| 961 | * CAP_FSETID capability is applicable. |
| 962 | */ |
| 963 | if (current_fsuid() != ip->i_d.di_uid && !capable(CAP_FOWNER)) { |
| 964 | code = XFS_ERROR(EPERM); |
| 965 | goto error_return; |
| 966 | } |
| 967 | |
| 968 | /* |
| 969 | * Do a quota reservation only if projid is actually going to change. |
| 970 | */ |
| 971 | if (mask & FSX_PROJID) { |
| 972 | if (XFS_IS_QUOTA_RUNNING(mp) && |
| 973 | XFS_IS_PQUOTA_ON(mp) && |
| 974 | xfs_get_projid(ip) != fa->fsx_projid) { |
| 975 | ASSERT(tp); |
| 976 | code = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, |
| 977 | capable(CAP_FOWNER) ? |
| 978 | XFS_QMOPT_FORCE_RES : 0); |
| 979 | if (code) /* out of quota */ |
| 980 | goto error_return; |
| 981 | } |
| 982 | } |
| 983 | |
| 984 | if (mask & FSX_EXTSIZE) { |
| 985 | /* |
| 986 | * Can't change extent size if any extents are allocated. |
| 987 | */ |
| 988 | if (ip->i_d.di_nextents && |
| 989 | ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != |
| 990 | fa->fsx_extsize)) { |
| 991 | code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| 992 | goto error_return; |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | * Extent size must be a multiple of the appropriate block |
| 997 | * size, if set at all. It must also be smaller than the |
| 998 | * maximum extent size supported by the filesystem. |
| 999 | * |
| 1000 | * Also, for non-realtime files, limit the extent size hint to |
| 1001 | * half the size of the AGs in the filesystem so alignment |
| 1002 | * doesn't result in extents larger than an AG. |
| 1003 | */ |
| 1004 | if (fa->fsx_extsize != 0) { |
| 1005 | xfs_extlen_t size; |
| 1006 | xfs_fsblock_t extsize_fsb; |
| 1007 | |
| 1008 | extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); |
| 1009 | if (extsize_fsb > MAXEXTLEN) { |
| 1010 | code = XFS_ERROR(EINVAL); |
| 1011 | goto error_return; |
| 1012 | } |
| 1013 | |
| 1014 | if (XFS_IS_REALTIME_INODE(ip) || |
| 1015 | ((mask & FSX_XFLAGS) && |
| 1016 | (fa->fsx_xflags & XFS_XFLAG_REALTIME))) { |
| 1017 | size = mp->m_sb.sb_rextsize << |
| 1018 | mp->m_sb.sb_blocklog; |
| 1019 | } else { |
| 1020 | size = mp->m_sb.sb_blocksize; |
| 1021 | if (extsize_fsb > mp->m_sb.sb_agblocks / 2) { |
| 1022 | code = XFS_ERROR(EINVAL); |
| 1023 | goto error_return; |
| 1024 | } |
| 1025 | } |
| 1026 | |
| 1027 | if (fa->fsx_extsize % size) { |
| 1028 | code = XFS_ERROR(EINVAL); |
| 1029 | goto error_return; |
| 1030 | } |
| 1031 | } |
| 1032 | } |
| 1033 | |
| 1034 | |
| 1035 | if (mask & FSX_XFLAGS) { |
| 1036 | /* |
| 1037 | * Can't change realtime flag if any extents are allocated. |
| 1038 | */ |
| 1039 | if ((ip->i_d.di_nextents || ip->i_delayed_blks) && |
| 1040 | (XFS_IS_REALTIME_INODE(ip)) != |
| 1041 | (fa->fsx_xflags & XFS_XFLAG_REALTIME)) { |
| 1042 | code = XFS_ERROR(EINVAL); /* EFBIG? */ |
| 1043 | goto error_return; |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * If realtime flag is set then must have realtime data. |
| 1048 | */ |
| 1049 | if ((fa->fsx_xflags & XFS_XFLAG_REALTIME)) { |
| 1050 | if ((mp->m_sb.sb_rblocks == 0) || |
| 1051 | (mp->m_sb.sb_rextsize == 0) || |
| 1052 | (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) { |
| 1053 | code = XFS_ERROR(EINVAL); |
| 1054 | goto error_return; |
| 1055 | } |
| 1056 | } |
| 1057 | |
| 1058 | /* |
| 1059 | * Can't modify an immutable/append-only file unless |
| 1060 | * we have appropriate permission. |
| 1061 | */ |
| 1062 | if ((ip->i_d.di_flags & |
| 1063 | (XFS_DIFLAG_IMMUTABLE|XFS_DIFLAG_APPEND) || |
| 1064 | (fa->fsx_xflags & |
| 1065 | (XFS_XFLAG_IMMUTABLE | XFS_XFLAG_APPEND))) && |
| 1066 | !capable(CAP_LINUX_IMMUTABLE)) { |
| 1067 | code = XFS_ERROR(EPERM); |
| 1068 | goto error_return; |
| 1069 | } |
| 1070 | } |
| 1071 | |
| 1072 | xfs_trans_ijoin(tp, ip, 0); |
| 1073 | |
| 1074 | /* |
| 1075 | * Change file ownership. Must be the owner or privileged. |
| 1076 | */ |
| 1077 | if (mask & FSX_PROJID) { |
| 1078 | /* |
| 1079 | * CAP_FSETID overrides the following restrictions: |
| 1080 | * |
| 1081 | * The set-user-ID and set-group-ID bits of a file will be |
| 1082 | * cleared upon successful return from chown() |
| 1083 | */ |
| 1084 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && |
| 1085 | !capable(CAP_FSETID)) |
| 1086 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| 1087 | |
| 1088 | /* |
| 1089 | * Change the ownerships and register quota modifications |
| 1090 | * in the transaction. |
| 1091 | */ |
| 1092 | if (xfs_get_projid(ip) != fa->fsx_projid) { |
| 1093 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { |
| 1094 | olddquot = xfs_qm_vop_chown(tp, ip, |
| 1095 | &ip->i_gdquot, gdqp); |
| 1096 | } |
| 1097 | xfs_set_projid(ip, fa->fsx_projid); |
| 1098 | |
| 1099 | /* |
| 1100 | * We may have to rev the inode as well as |
| 1101 | * the superblock version number since projids didn't |
| 1102 | * exist before DINODE_VERSION_2 and SB_VERSION_NLINK. |
| 1103 | */ |
| 1104 | if (ip->i_d.di_version == 1) |
| 1105 | xfs_bump_ino_vers2(tp, ip); |
| 1106 | } |
| 1107 | |
| 1108 | } |
| 1109 | |
| 1110 | if (mask & FSX_EXTSIZE) |
| 1111 | ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; |
| 1112 | if (mask & FSX_XFLAGS) { |
| 1113 | xfs_set_diflags(ip, fa->fsx_xflags); |
| 1114 | xfs_diflags_to_linux(ip); |
| 1115 | } |
| 1116 | |
| 1117 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); |
| 1118 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1119 | |
| 1120 | XFS_STATS_INC(xs_ig_attrchg); |
| 1121 | |
| 1122 | /* |
| 1123 | * If this is a synchronous mount, make sure that the |
| 1124 | * transaction goes to disk before returning to the user. |
| 1125 | * This is slightly sub-optimal in that truncates require |
| 1126 | * two sync transactions instead of one for wsync filesystems. |
| 1127 | * One for the truncate and one for the timestamps since we |
| 1128 | * don't want to change the timestamps unless we're sure the |
| 1129 | * truncate worked. Truncates are less than 1% of the laddis |
| 1130 | * mix so this probably isn't worth the trouble to optimize. |
| 1131 | */ |
| 1132 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 1133 | xfs_trans_set_sync(tp); |
| 1134 | code = xfs_trans_commit(tp, 0); |
| 1135 | xfs_iunlock(ip, lock_flags); |
| 1136 | |
| 1137 | /* |
| 1138 | * Release any dquot(s) the inode had kept before chown. |
| 1139 | */ |
| 1140 | xfs_qm_dqrele(olddquot); |
| 1141 | xfs_qm_dqrele(udqp); |
| 1142 | xfs_qm_dqrele(gdqp); |
| 1143 | |
| 1144 | return code; |
| 1145 | |
| 1146 | error_return: |
| 1147 | xfs_qm_dqrele(udqp); |
| 1148 | xfs_qm_dqrele(gdqp); |
| 1149 | xfs_trans_cancel(tp, 0); |
| 1150 | if (lock_flags) |
| 1151 | xfs_iunlock(ip, lock_flags); |
| 1152 | return code; |
| 1153 | } |
| 1154 | |
| 1155 | STATIC int |
| 1156 | xfs_ioc_fssetxattr( |
| 1157 | xfs_inode_t *ip, |
| 1158 | struct file *filp, |
| 1159 | void __user *arg) |
| 1160 | { |
| 1161 | struct fsxattr fa; |
| 1162 | unsigned int mask; |
| 1163 | |
| 1164 | if (copy_from_user(&fa, arg, sizeof(fa))) |
| 1165 | return -EFAULT; |
| 1166 | |
| 1167 | mask = FSX_XFLAGS | FSX_EXTSIZE | FSX_PROJID; |
| 1168 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 1169 | mask |= FSX_NONBLOCK; |
| 1170 | |
| 1171 | return -xfs_ioctl_setattr(ip, &fa, mask); |
| 1172 | } |
| 1173 | |
| 1174 | STATIC int |
| 1175 | xfs_ioc_getxflags( |
| 1176 | xfs_inode_t *ip, |
| 1177 | void __user *arg) |
| 1178 | { |
| 1179 | unsigned int flags; |
| 1180 | |
| 1181 | flags = xfs_di2lxflags(ip->i_d.di_flags); |
| 1182 | if (copy_to_user(arg, &flags, sizeof(flags))) |
| 1183 | return -EFAULT; |
| 1184 | return 0; |
| 1185 | } |
| 1186 | |
| 1187 | STATIC int |
| 1188 | xfs_ioc_setxflags( |
| 1189 | xfs_inode_t *ip, |
| 1190 | struct file *filp, |
| 1191 | void __user *arg) |
| 1192 | { |
| 1193 | struct fsxattr fa; |
| 1194 | unsigned int flags; |
| 1195 | unsigned int mask; |
| 1196 | |
| 1197 | if (copy_from_user(&flags, arg, sizeof(flags))) |
| 1198 | return -EFAULT; |
| 1199 | |
| 1200 | if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
| 1201 | FS_NOATIME_FL | FS_NODUMP_FL | \ |
| 1202 | FS_SYNC_FL)) |
| 1203 | return -EOPNOTSUPP; |
| 1204 | |
| 1205 | mask = FSX_XFLAGS; |
| 1206 | if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) |
| 1207 | mask |= FSX_NONBLOCK; |
| 1208 | fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); |
| 1209 | |
| 1210 | return -xfs_ioctl_setattr(ip, &fa, mask); |
| 1211 | } |
| 1212 | |
| 1213 | STATIC int |
| 1214 | xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) |
| 1215 | { |
| 1216 | struct getbmap __user *base = *ap; |
| 1217 | |
| 1218 | /* copy only getbmap portion (not getbmapx) */ |
| 1219 | if (copy_to_user(base, bmv, sizeof(struct getbmap))) |
| 1220 | return XFS_ERROR(EFAULT); |
| 1221 | |
| 1222 | *ap += sizeof(struct getbmap); |
| 1223 | return 0; |
| 1224 | } |
| 1225 | |
| 1226 | STATIC int |
| 1227 | xfs_ioc_getbmap( |
| 1228 | struct xfs_inode *ip, |
| 1229 | int ioflags, |
| 1230 | unsigned int cmd, |
| 1231 | void __user *arg) |
| 1232 | { |
| 1233 | struct getbmapx bmx; |
| 1234 | int error; |
| 1235 | |
| 1236 | if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) |
| 1237 | return -XFS_ERROR(EFAULT); |
| 1238 | |
| 1239 | if (bmx.bmv_count < 2) |
| 1240 | return -XFS_ERROR(EINVAL); |
| 1241 | |
| 1242 | bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
| 1243 | if (ioflags & IO_INVIS) |
| 1244 | bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; |
| 1245 | |
| 1246 | error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, |
| 1247 | (struct getbmap *)arg+1); |
| 1248 | if (error) |
| 1249 | return -error; |
| 1250 | |
| 1251 | /* copy back header - only size of getbmap */ |
| 1252 | if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) |
| 1253 | return -XFS_ERROR(EFAULT); |
| 1254 | return 0; |
| 1255 | } |
| 1256 | |
| 1257 | STATIC int |
| 1258 | xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) |
| 1259 | { |
| 1260 | struct getbmapx __user *base = *ap; |
| 1261 | |
| 1262 | if (copy_to_user(base, bmv, sizeof(struct getbmapx))) |
| 1263 | return XFS_ERROR(EFAULT); |
| 1264 | |
| 1265 | *ap += sizeof(struct getbmapx); |
| 1266 | return 0; |
| 1267 | } |
| 1268 | |
| 1269 | STATIC int |
| 1270 | xfs_ioc_getbmapx( |
| 1271 | struct xfs_inode *ip, |
| 1272 | void __user *arg) |
| 1273 | { |
| 1274 | struct getbmapx bmx; |
| 1275 | int error; |
| 1276 | |
| 1277 | if (copy_from_user(&bmx, arg, sizeof(bmx))) |
| 1278 | return -XFS_ERROR(EFAULT); |
| 1279 | |
| 1280 | if (bmx.bmv_count < 2) |
| 1281 | return -XFS_ERROR(EINVAL); |
| 1282 | |
| 1283 | if (bmx.bmv_iflags & (~BMV_IF_VALID)) |
| 1284 | return -XFS_ERROR(EINVAL); |
| 1285 | |
| 1286 | error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, |
| 1287 | (struct getbmapx *)arg+1); |
| 1288 | if (error) |
| 1289 | return -error; |
| 1290 | |
| 1291 | /* copy back header */ |
| 1292 | if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) |
| 1293 | return -XFS_ERROR(EFAULT); |
| 1294 | |
| 1295 | return 0; |
| 1296 | } |
| 1297 | |
| 1298 | /* |
| 1299 | * Note: some of the ioctl's return positive numbers as a |
| 1300 | * byte count indicating success, such as readlink_by_handle. |
| 1301 | * So we don't "sign flip" like most other routines. This means |
| 1302 | * true errors need to be returned as a negative value. |
| 1303 | */ |
| 1304 | long |
| 1305 | xfs_file_ioctl( |
| 1306 | struct file *filp, |
| 1307 | unsigned int cmd, |
| 1308 | unsigned long p) |
| 1309 | { |
| 1310 | struct inode *inode = filp->f_path.dentry->d_inode; |
| 1311 | struct xfs_inode *ip = XFS_I(inode); |
| 1312 | struct xfs_mount *mp = ip->i_mount; |
| 1313 | void __user *arg = (void __user *)p; |
| 1314 | int ioflags = 0; |
| 1315 | int error; |
| 1316 | |
| 1317 | if (filp->f_mode & FMODE_NOCMTIME) |
| 1318 | ioflags |= IO_INVIS; |
| 1319 | |
| 1320 | trace_xfs_file_ioctl(ip); |
| 1321 | |
| 1322 | switch (cmd) { |
| 1323 | case FITRIM: |
| 1324 | return xfs_ioc_trim(mp, arg); |
| 1325 | case XFS_IOC_ALLOCSP: |
| 1326 | case XFS_IOC_FREESP: |
| 1327 | case XFS_IOC_RESVSP: |
| 1328 | case XFS_IOC_UNRESVSP: |
| 1329 | case XFS_IOC_ALLOCSP64: |
| 1330 | case XFS_IOC_FREESP64: |
| 1331 | case XFS_IOC_RESVSP64: |
| 1332 | case XFS_IOC_UNRESVSP64: |
| 1333 | case XFS_IOC_ZERO_RANGE: { |
| 1334 | xfs_flock64_t bf; |
| 1335 | |
| 1336 | if (copy_from_user(&bf, arg, sizeof(bf))) |
| 1337 | return -XFS_ERROR(EFAULT); |
| 1338 | return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); |
| 1339 | } |
| 1340 | case XFS_IOC_DIOINFO: { |
| 1341 | struct dioattr da; |
| 1342 | xfs_buftarg_t *target = |
| 1343 | XFS_IS_REALTIME_INODE(ip) ? |
| 1344 | mp->m_rtdev_targp : mp->m_ddev_targp; |
| 1345 | |
| 1346 | da.d_mem = da.d_miniosz = 1 << target->bt_sshift; |
| 1347 | da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
| 1348 | |
| 1349 | if (copy_to_user(arg, &da, sizeof(da))) |
| 1350 | return -XFS_ERROR(EFAULT); |
| 1351 | return 0; |
| 1352 | } |
| 1353 | |
| 1354 | case XFS_IOC_FSBULKSTAT_SINGLE: |
| 1355 | case XFS_IOC_FSBULKSTAT: |
| 1356 | case XFS_IOC_FSINUMBERS: |
| 1357 | return xfs_ioc_bulkstat(mp, cmd, arg); |
| 1358 | |
| 1359 | case XFS_IOC_FSGEOMETRY_V1: |
| 1360 | return xfs_ioc_fsgeometry_v1(mp, arg); |
| 1361 | |
| 1362 | case XFS_IOC_FSGEOMETRY: |
| 1363 | return xfs_ioc_fsgeometry(mp, arg); |
| 1364 | |
| 1365 | case XFS_IOC_GETVERSION: |
| 1366 | return put_user(inode->i_generation, (int __user *)arg); |
| 1367 | |
| 1368 | case XFS_IOC_FSGETXATTR: |
| 1369 | return xfs_ioc_fsgetxattr(ip, 0, arg); |
| 1370 | case XFS_IOC_FSGETXATTRA: |
| 1371 | return xfs_ioc_fsgetxattr(ip, 1, arg); |
| 1372 | case XFS_IOC_FSSETXATTR: |
| 1373 | return xfs_ioc_fssetxattr(ip, filp, arg); |
| 1374 | case XFS_IOC_GETXFLAGS: |
| 1375 | return xfs_ioc_getxflags(ip, arg); |
| 1376 | case XFS_IOC_SETXFLAGS: |
| 1377 | return xfs_ioc_setxflags(ip, filp, arg); |
| 1378 | |
| 1379 | case XFS_IOC_FSSETDM: { |
| 1380 | struct fsdmidata dmi; |
| 1381 | |
| 1382 | if (copy_from_user(&dmi, arg, sizeof(dmi))) |
| 1383 | return -XFS_ERROR(EFAULT); |
| 1384 | |
| 1385 | error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, |
| 1386 | dmi.fsd_dmstate); |
| 1387 | return -error; |
| 1388 | } |
| 1389 | |
| 1390 | case XFS_IOC_GETBMAP: |
| 1391 | case XFS_IOC_GETBMAPA: |
| 1392 | return xfs_ioc_getbmap(ip, ioflags, cmd, arg); |
| 1393 | |
| 1394 | case XFS_IOC_GETBMAPX: |
| 1395 | return xfs_ioc_getbmapx(ip, arg); |
| 1396 | |
| 1397 | case XFS_IOC_FD_TO_HANDLE: |
| 1398 | case XFS_IOC_PATH_TO_HANDLE: |
| 1399 | case XFS_IOC_PATH_TO_FSHANDLE: { |
| 1400 | xfs_fsop_handlereq_t hreq; |
| 1401 | |
| 1402 | if (copy_from_user(&hreq, arg, sizeof(hreq))) |
| 1403 | return -XFS_ERROR(EFAULT); |
| 1404 | return xfs_find_handle(cmd, &hreq); |
| 1405 | } |
| 1406 | case XFS_IOC_OPEN_BY_HANDLE: { |
| 1407 | xfs_fsop_handlereq_t hreq; |
| 1408 | |
| 1409 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 1410 | return -XFS_ERROR(EFAULT); |
| 1411 | return xfs_open_by_handle(filp, &hreq); |
| 1412 | } |
| 1413 | case XFS_IOC_FSSETDM_BY_HANDLE: |
| 1414 | return xfs_fssetdm_by_handle(filp, arg); |
| 1415 | |
| 1416 | case XFS_IOC_READLINK_BY_HANDLE: { |
| 1417 | xfs_fsop_handlereq_t hreq; |
| 1418 | |
| 1419 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 1420 | return -XFS_ERROR(EFAULT); |
| 1421 | return xfs_readlink_by_handle(filp, &hreq); |
| 1422 | } |
| 1423 | case XFS_IOC_ATTRLIST_BY_HANDLE: |
| 1424 | return xfs_attrlist_by_handle(filp, arg); |
| 1425 | |
| 1426 | case XFS_IOC_ATTRMULTI_BY_HANDLE: |
| 1427 | return xfs_attrmulti_by_handle(filp, arg); |
| 1428 | |
| 1429 | case XFS_IOC_SWAPEXT: { |
| 1430 | struct xfs_swapext sxp; |
| 1431 | |
| 1432 | if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) |
| 1433 | return -XFS_ERROR(EFAULT); |
| 1434 | error = xfs_swapext(&sxp); |
| 1435 | return -error; |
| 1436 | } |
| 1437 | |
| 1438 | case XFS_IOC_FSCOUNTS: { |
| 1439 | xfs_fsop_counts_t out; |
| 1440 | |
| 1441 | error = xfs_fs_counts(mp, &out); |
| 1442 | if (error) |
| 1443 | return -error; |
| 1444 | |
| 1445 | if (copy_to_user(arg, &out, sizeof(out))) |
| 1446 | return -XFS_ERROR(EFAULT); |
| 1447 | return 0; |
| 1448 | } |
| 1449 | |
| 1450 | case XFS_IOC_SET_RESBLKS: { |
| 1451 | xfs_fsop_resblks_t inout; |
| 1452 | __uint64_t in; |
| 1453 | |
| 1454 | if (!capable(CAP_SYS_ADMIN)) |
| 1455 | return -EPERM; |
| 1456 | |
| 1457 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 1458 | return -XFS_ERROR(EROFS); |
| 1459 | |
| 1460 | if (copy_from_user(&inout, arg, sizeof(inout))) |
| 1461 | return -XFS_ERROR(EFAULT); |
| 1462 | |
| 1463 | /* input parameter is passed in resblks field of structure */ |
| 1464 | in = inout.resblks; |
| 1465 | error = xfs_reserve_blocks(mp, &in, &inout); |
| 1466 | if (error) |
| 1467 | return -error; |
| 1468 | |
| 1469 | if (copy_to_user(arg, &inout, sizeof(inout))) |
| 1470 | return -XFS_ERROR(EFAULT); |
| 1471 | return 0; |
| 1472 | } |
| 1473 | |
| 1474 | case XFS_IOC_GET_RESBLKS: { |
| 1475 | xfs_fsop_resblks_t out; |
| 1476 | |
| 1477 | if (!capable(CAP_SYS_ADMIN)) |
| 1478 | return -EPERM; |
| 1479 | |
| 1480 | error = xfs_reserve_blocks(mp, NULL, &out); |
| 1481 | if (error) |
| 1482 | return -error; |
| 1483 | |
| 1484 | if (copy_to_user(arg, &out, sizeof(out))) |
| 1485 | return -XFS_ERROR(EFAULT); |
| 1486 | |
| 1487 | return 0; |
| 1488 | } |
| 1489 | |
| 1490 | case XFS_IOC_FSGROWFSDATA: { |
| 1491 | xfs_growfs_data_t in; |
| 1492 | |
| 1493 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1494 | return -XFS_ERROR(EFAULT); |
| 1495 | |
| 1496 | error = xfs_growfs_data(mp, &in); |
| 1497 | return -error; |
| 1498 | } |
| 1499 | |
| 1500 | case XFS_IOC_FSGROWFSLOG: { |
| 1501 | xfs_growfs_log_t in; |
| 1502 | |
| 1503 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1504 | return -XFS_ERROR(EFAULT); |
| 1505 | |
| 1506 | error = xfs_growfs_log(mp, &in); |
| 1507 | return -error; |
| 1508 | } |
| 1509 | |
| 1510 | case XFS_IOC_FSGROWFSRT: { |
| 1511 | xfs_growfs_rt_t in; |
| 1512 | |
| 1513 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1514 | return -XFS_ERROR(EFAULT); |
| 1515 | |
| 1516 | error = xfs_growfs_rt(mp, &in); |
| 1517 | return -error; |
| 1518 | } |
| 1519 | |
| 1520 | case XFS_IOC_GOINGDOWN: { |
| 1521 | __uint32_t in; |
| 1522 | |
| 1523 | if (!capable(CAP_SYS_ADMIN)) |
| 1524 | return -EPERM; |
| 1525 | |
| 1526 | if (get_user(in, (__uint32_t __user *)arg)) |
| 1527 | return -XFS_ERROR(EFAULT); |
| 1528 | |
| 1529 | error = xfs_fs_goingdown(mp, in); |
| 1530 | return -error; |
| 1531 | } |
| 1532 | |
| 1533 | case XFS_IOC_ERROR_INJECTION: { |
| 1534 | xfs_error_injection_t in; |
| 1535 | |
| 1536 | if (!capable(CAP_SYS_ADMIN)) |
| 1537 | return -EPERM; |
| 1538 | |
| 1539 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1540 | return -XFS_ERROR(EFAULT); |
| 1541 | |
| 1542 | error = xfs_errortag_add(in.errtag, mp); |
| 1543 | return -error; |
| 1544 | } |
| 1545 | |
| 1546 | case XFS_IOC_ERROR_CLEARALL: |
| 1547 | if (!capable(CAP_SYS_ADMIN)) |
| 1548 | return -EPERM; |
| 1549 | |
| 1550 | error = xfs_errortag_clearall(mp, 1); |
| 1551 | return -error; |
| 1552 | |
| 1553 | default: |
| 1554 | return -ENOTTY; |
| 1555 | } |
| 1556 | } |