| 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_shared.h" |
| 21 | #include "xfs_format.h" |
| 22 | #include "xfs_log_format.h" |
| 23 | #include "xfs_trans_resv.h" |
| 24 | #include "xfs_mount.h" |
| 25 | #include "xfs_inode.h" |
| 26 | #include "xfs_ioctl.h" |
| 27 | #include "xfs_alloc.h" |
| 28 | #include "xfs_rtalloc.h" |
| 29 | #include "xfs_itable.h" |
| 30 | #include "xfs_error.h" |
| 31 | #include "xfs_attr.h" |
| 32 | #include "xfs_bmap.h" |
| 33 | #include "xfs_bmap_util.h" |
| 34 | #include "xfs_fsops.h" |
| 35 | #include "xfs_discard.h" |
| 36 | #include "xfs_quota.h" |
| 37 | #include "xfs_export.h" |
| 38 | #include "xfs_trace.h" |
| 39 | #include "xfs_icache.h" |
| 40 | #include "xfs_symlink.h" |
| 41 | #include "xfs_trans.h" |
| 42 | #include "xfs_pnfs.h" |
| 43 | #include "xfs_acl.h" |
| 44 | |
| 45 | #include <linux/capability.h> |
| 46 | #include <linux/dcache.h> |
| 47 | #include <linux/mount.h> |
| 48 | #include <linux/namei.h> |
| 49 | #include <linux/pagemap.h> |
| 50 | #include <linux/slab.h> |
| 51 | #include <linux/exportfs.h> |
| 52 | |
| 53 | /* |
| 54 | * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to |
| 55 | * a file or fs handle. |
| 56 | * |
| 57 | * XFS_IOC_PATH_TO_FSHANDLE |
| 58 | * returns fs handle for a mount point or path within that mount point |
| 59 | * XFS_IOC_FD_TO_HANDLE |
| 60 | * returns full handle for a FD opened in user space |
| 61 | * XFS_IOC_PATH_TO_HANDLE |
| 62 | * returns full handle for a path |
| 63 | */ |
| 64 | int |
| 65 | xfs_find_handle( |
| 66 | unsigned int cmd, |
| 67 | xfs_fsop_handlereq_t *hreq) |
| 68 | { |
| 69 | int hsize; |
| 70 | xfs_handle_t handle; |
| 71 | struct inode *inode; |
| 72 | struct fd f = {NULL}; |
| 73 | struct path path; |
| 74 | int error; |
| 75 | struct xfs_inode *ip; |
| 76 | |
| 77 | if (cmd == XFS_IOC_FD_TO_HANDLE) { |
| 78 | f = fdget(hreq->fd); |
| 79 | if (!f.file) |
| 80 | return -EBADF; |
| 81 | inode = file_inode(f.file); |
| 82 | } else { |
| 83 | error = user_lpath((const char __user *)hreq->path, &path); |
| 84 | if (error) |
| 85 | return error; |
| 86 | inode = d_inode(path.dentry); |
| 87 | } |
| 88 | ip = XFS_I(inode); |
| 89 | |
| 90 | /* |
| 91 | * We can only generate handles for inodes residing on a XFS filesystem, |
| 92 | * and only for regular files, directories or symbolic links. |
| 93 | */ |
| 94 | error = -EINVAL; |
| 95 | if (inode->i_sb->s_magic != XFS_SB_MAGIC) |
| 96 | goto out_put; |
| 97 | |
| 98 | error = -EBADF; |
| 99 | if (!S_ISREG(inode->i_mode) && |
| 100 | !S_ISDIR(inode->i_mode) && |
| 101 | !S_ISLNK(inode->i_mode)) |
| 102 | goto out_put; |
| 103 | |
| 104 | |
| 105 | memcpy(&handle.ha_fsid, ip->i_mount->m_fixedfsid, sizeof(xfs_fsid_t)); |
| 106 | |
| 107 | if (cmd == XFS_IOC_PATH_TO_FSHANDLE) { |
| 108 | /* |
| 109 | * This handle only contains an fsid, zero the rest. |
| 110 | */ |
| 111 | memset(&handle.ha_fid, 0, sizeof(handle.ha_fid)); |
| 112 | hsize = sizeof(xfs_fsid_t); |
| 113 | } else { |
| 114 | handle.ha_fid.fid_len = sizeof(xfs_fid_t) - |
| 115 | sizeof(handle.ha_fid.fid_len); |
| 116 | handle.ha_fid.fid_pad = 0; |
| 117 | handle.ha_fid.fid_gen = inode->i_generation; |
| 118 | handle.ha_fid.fid_ino = ip->i_ino; |
| 119 | |
| 120 | hsize = XFS_HSIZE(handle); |
| 121 | } |
| 122 | |
| 123 | error = -EFAULT; |
| 124 | if (copy_to_user(hreq->ohandle, &handle, hsize) || |
| 125 | copy_to_user(hreq->ohandlen, &hsize, sizeof(__s32))) |
| 126 | goto out_put; |
| 127 | |
| 128 | error = 0; |
| 129 | |
| 130 | out_put: |
| 131 | if (cmd == XFS_IOC_FD_TO_HANDLE) |
| 132 | fdput(f); |
| 133 | else |
| 134 | path_put(&path); |
| 135 | return error; |
| 136 | } |
| 137 | |
| 138 | /* |
| 139 | * No need to do permission checks on the various pathname components |
| 140 | * as the handle operations are privileged. |
| 141 | */ |
| 142 | STATIC int |
| 143 | xfs_handle_acceptable( |
| 144 | void *context, |
| 145 | struct dentry *dentry) |
| 146 | { |
| 147 | return 1; |
| 148 | } |
| 149 | |
| 150 | /* |
| 151 | * Convert userspace handle data into a dentry. |
| 152 | */ |
| 153 | struct dentry * |
| 154 | xfs_handle_to_dentry( |
| 155 | struct file *parfilp, |
| 156 | void __user *uhandle, |
| 157 | u32 hlen) |
| 158 | { |
| 159 | xfs_handle_t handle; |
| 160 | struct xfs_fid64 fid; |
| 161 | |
| 162 | /* |
| 163 | * Only allow handle opens under a directory. |
| 164 | */ |
| 165 | if (!S_ISDIR(file_inode(parfilp)->i_mode)) |
| 166 | return ERR_PTR(-ENOTDIR); |
| 167 | |
| 168 | if (hlen != sizeof(xfs_handle_t)) |
| 169 | return ERR_PTR(-EINVAL); |
| 170 | if (copy_from_user(&handle, uhandle, hlen)) |
| 171 | return ERR_PTR(-EFAULT); |
| 172 | if (handle.ha_fid.fid_len != |
| 173 | sizeof(handle.ha_fid) - sizeof(handle.ha_fid.fid_len)) |
| 174 | return ERR_PTR(-EINVAL); |
| 175 | |
| 176 | memset(&fid, 0, sizeof(struct fid)); |
| 177 | fid.ino = handle.ha_fid.fid_ino; |
| 178 | fid.gen = handle.ha_fid.fid_gen; |
| 179 | |
| 180 | return exportfs_decode_fh(parfilp->f_path.mnt, (struct fid *)&fid, 3, |
| 181 | FILEID_INO32_GEN | XFS_FILEID_TYPE_64FLAG, |
| 182 | xfs_handle_acceptable, NULL); |
| 183 | } |
| 184 | |
| 185 | STATIC struct dentry * |
| 186 | xfs_handlereq_to_dentry( |
| 187 | struct file *parfilp, |
| 188 | xfs_fsop_handlereq_t *hreq) |
| 189 | { |
| 190 | return xfs_handle_to_dentry(parfilp, hreq->ihandle, hreq->ihandlen); |
| 191 | } |
| 192 | |
| 193 | int |
| 194 | xfs_open_by_handle( |
| 195 | struct file *parfilp, |
| 196 | xfs_fsop_handlereq_t *hreq) |
| 197 | { |
| 198 | const struct cred *cred = current_cred(); |
| 199 | int error; |
| 200 | int fd; |
| 201 | int permflag; |
| 202 | struct file *filp; |
| 203 | struct inode *inode; |
| 204 | struct dentry *dentry; |
| 205 | fmode_t fmode; |
| 206 | struct path path; |
| 207 | |
| 208 | if (!capable(CAP_SYS_ADMIN)) |
| 209 | return -EPERM; |
| 210 | |
| 211 | dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| 212 | if (IS_ERR(dentry)) |
| 213 | return PTR_ERR(dentry); |
| 214 | inode = d_inode(dentry); |
| 215 | |
| 216 | /* Restrict xfs_open_by_handle to directories & regular files. */ |
| 217 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) { |
| 218 | error = -EPERM; |
| 219 | goto out_dput; |
| 220 | } |
| 221 | |
| 222 | #if BITS_PER_LONG != 32 |
| 223 | hreq->oflags |= O_LARGEFILE; |
| 224 | #endif |
| 225 | |
| 226 | permflag = hreq->oflags; |
| 227 | fmode = OPEN_FMODE(permflag); |
| 228 | if ((!(permflag & O_APPEND) || (permflag & O_TRUNC)) && |
| 229 | (fmode & FMODE_WRITE) && IS_APPEND(inode)) { |
| 230 | error = -EPERM; |
| 231 | goto out_dput; |
| 232 | } |
| 233 | |
| 234 | if ((fmode & FMODE_WRITE) && IS_IMMUTABLE(inode)) { |
| 235 | error = -EACCES; |
| 236 | goto out_dput; |
| 237 | } |
| 238 | |
| 239 | /* Can't write directories. */ |
| 240 | if (S_ISDIR(inode->i_mode) && (fmode & FMODE_WRITE)) { |
| 241 | error = -EISDIR; |
| 242 | goto out_dput; |
| 243 | } |
| 244 | |
| 245 | fd = get_unused_fd_flags(0); |
| 246 | if (fd < 0) { |
| 247 | error = fd; |
| 248 | goto out_dput; |
| 249 | } |
| 250 | |
| 251 | path.mnt = parfilp->f_path.mnt; |
| 252 | path.dentry = dentry; |
| 253 | filp = dentry_open(&path, hreq->oflags, cred); |
| 254 | dput(dentry); |
| 255 | if (IS_ERR(filp)) { |
| 256 | put_unused_fd(fd); |
| 257 | return PTR_ERR(filp); |
| 258 | } |
| 259 | |
| 260 | if (S_ISREG(inode->i_mode)) { |
| 261 | filp->f_flags |= O_NOATIME; |
| 262 | filp->f_mode |= FMODE_NOCMTIME; |
| 263 | } |
| 264 | |
| 265 | fd_install(fd, filp); |
| 266 | return fd; |
| 267 | |
| 268 | out_dput: |
| 269 | dput(dentry); |
| 270 | return error; |
| 271 | } |
| 272 | |
| 273 | int |
| 274 | xfs_readlink_by_handle( |
| 275 | struct file *parfilp, |
| 276 | xfs_fsop_handlereq_t *hreq) |
| 277 | { |
| 278 | struct dentry *dentry; |
| 279 | __u32 olen; |
| 280 | int error; |
| 281 | |
| 282 | if (!capable(CAP_SYS_ADMIN)) |
| 283 | return -EPERM; |
| 284 | |
| 285 | dentry = xfs_handlereq_to_dentry(parfilp, hreq); |
| 286 | if (IS_ERR(dentry)) |
| 287 | return PTR_ERR(dentry); |
| 288 | |
| 289 | /* Restrict this handle operation to symlinks only. */ |
| 290 | if (!d_inode(dentry)->i_op->readlink) { |
| 291 | error = -EINVAL; |
| 292 | goto out_dput; |
| 293 | } |
| 294 | |
| 295 | if (copy_from_user(&olen, hreq->ohandlen, sizeof(__u32))) { |
| 296 | error = -EFAULT; |
| 297 | goto out_dput; |
| 298 | } |
| 299 | |
| 300 | error = d_inode(dentry)->i_op->readlink(dentry, hreq->ohandle, olen); |
| 301 | |
| 302 | out_dput: |
| 303 | dput(dentry); |
| 304 | return error; |
| 305 | } |
| 306 | |
| 307 | int |
| 308 | xfs_set_dmattrs( |
| 309 | xfs_inode_t *ip, |
| 310 | u_int evmask, |
| 311 | u_int16_t state) |
| 312 | { |
| 313 | xfs_mount_t *mp = ip->i_mount; |
| 314 | xfs_trans_t *tp; |
| 315 | int error; |
| 316 | |
| 317 | if (!capable(CAP_SYS_ADMIN)) |
| 318 | return -EPERM; |
| 319 | |
| 320 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 321 | return -EIO; |
| 322 | |
| 323 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
| 324 | if (error) |
| 325 | return error; |
| 326 | |
| 327 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 328 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 329 | |
| 330 | ip->i_d.di_dmevmask = evmask; |
| 331 | ip->i_d.di_dmstate = state; |
| 332 | |
| 333 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 334 | error = xfs_trans_commit(tp); |
| 335 | |
| 336 | return error; |
| 337 | } |
| 338 | |
| 339 | STATIC int |
| 340 | xfs_fssetdm_by_handle( |
| 341 | struct file *parfilp, |
| 342 | void __user *arg) |
| 343 | { |
| 344 | int error; |
| 345 | struct fsdmidata fsd; |
| 346 | xfs_fsop_setdm_handlereq_t dmhreq; |
| 347 | struct dentry *dentry; |
| 348 | |
| 349 | if (!capable(CAP_MKNOD)) |
| 350 | return -EPERM; |
| 351 | if (copy_from_user(&dmhreq, arg, sizeof(xfs_fsop_setdm_handlereq_t))) |
| 352 | return -EFAULT; |
| 353 | |
| 354 | error = mnt_want_write_file(parfilp); |
| 355 | if (error) |
| 356 | return error; |
| 357 | |
| 358 | dentry = xfs_handlereq_to_dentry(parfilp, &dmhreq.hreq); |
| 359 | if (IS_ERR(dentry)) { |
| 360 | mnt_drop_write_file(parfilp); |
| 361 | return PTR_ERR(dentry); |
| 362 | } |
| 363 | |
| 364 | if (IS_IMMUTABLE(d_inode(dentry)) || IS_APPEND(d_inode(dentry))) { |
| 365 | error = -EPERM; |
| 366 | goto out; |
| 367 | } |
| 368 | |
| 369 | if (copy_from_user(&fsd, dmhreq.data, sizeof(fsd))) { |
| 370 | error = -EFAULT; |
| 371 | goto out; |
| 372 | } |
| 373 | |
| 374 | error = xfs_set_dmattrs(XFS_I(d_inode(dentry)), fsd.fsd_dmevmask, |
| 375 | fsd.fsd_dmstate); |
| 376 | |
| 377 | out: |
| 378 | mnt_drop_write_file(parfilp); |
| 379 | dput(dentry); |
| 380 | return error; |
| 381 | } |
| 382 | |
| 383 | STATIC int |
| 384 | xfs_attrlist_by_handle( |
| 385 | struct file *parfilp, |
| 386 | void __user *arg) |
| 387 | { |
| 388 | int error = -ENOMEM; |
| 389 | attrlist_cursor_kern_t *cursor; |
| 390 | xfs_fsop_attrlist_handlereq_t al_hreq; |
| 391 | struct dentry *dentry; |
| 392 | char *kbuf; |
| 393 | |
| 394 | if (!capable(CAP_SYS_ADMIN)) |
| 395 | return -EPERM; |
| 396 | if (copy_from_user(&al_hreq, arg, sizeof(xfs_fsop_attrlist_handlereq_t))) |
| 397 | return -EFAULT; |
| 398 | if (al_hreq.buflen < sizeof(struct attrlist) || |
| 399 | al_hreq.buflen > XFS_XATTR_LIST_MAX) |
| 400 | return -EINVAL; |
| 401 | |
| 402 | /* |
| 403 | * Reject flags, only allow namespaces. |
| 404 | */ |
| 405 | if (al_hreq.flags & ~(ATTR_ROOT | ATTR_SECURE)) |
| 406 | return -EINVAL; |
| 407 | |
| 408 | dentry = xfs_handlereq_to_dentry(parfilp, &al_hreq.hreq); |
| 409 | if (IS_ERR(dentry)) |
| 410 | return PTR_ERR(dentry); |
| 411 | |
| 412 | kbuf = kmem_zalloc_large(al_hreq.buflen, KM_SLEEP); |
| 413 | if (!kbuf) |
| 414 | goto out_dput; |
| 415 | |
| 416 | cursor = (attrlist_cursor_kern_t *)&al_hreq.pos; |
| 417 | error = xfs_attr_list(XFS_I(d_inode(dentry)), kbuf, al_hreq.buflen, |
| 418 | al_hreq.flags, cursor); |
| 419 | if (error) |
| 420 | goto out_kfree; |
| 421 | |
| 422 | if (copy_to_user(al_hreq.buffer, kbuf, al_hreq.buflen)) |
| 423 | error = -EFAULT; |
| 424 | |
| 425 | out_kfree: |
| 426 | kmem_free(kbuf); |
| 427 | out_dput: |
| 428 | dput(dentry); |
| 429 | return error; |
| 430 | } |
| 431 | |
| 432 | int |
| 433 | xfs_attrmulti_attr_get( |
| 434 | struct inode *inode, |
| 435 | unsigned char *name, |
| 436 | unsigned char __user *ubuf, |
| 437 | __uint32_t *len, |
| 438 | __uint32_t flags) |
| 439 | { |
| 440 | unsigned char *kbuf; |
| 441 | int error = -EFAULT; |
| 442 | |
| 443 | if (*len > XFS_XATTR_SIZE_MAX) |
| 444 | return -EINVAL; |
| 445 | kbuf = kmem_zalloc_large(*len, KM_SLEEP); |
| 446 | if (!kbuf) |
| 447 | return -ENOMEM; |
| 448 | |
| 449 | error = xfs_attr_get(XFS_I(inode), name, kbuf, (int *)len, flags); |
| 450 | if (error) |
| 451 | goto out_kfree; |
| 452 | |
| 453 | if (copy_to_user(ubuf, kbuf, *len)) |
| 454 | error = -EFAULT; |
| 455 | |
| 456 | out_kfree: |
| 457 | kmem_free(kbuf); |
| 458 | return error; |
| 459 | } |
| 460 | |
| 461 | int |
| 462 | xfs_attrmulti_attr_set( |
| 463 | struct inode *inode, |
| 464 | unsigned char *name, |
| 465 | const unsigned char __user *ubuf, |
| 466 | __uint32_t len, |
| 467 | __uint32_t flags) |
| 468 | { |
| 469 | unsigned char *kbuf; |
| 470 | int error; |
| 471 | |
| 472 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 473 | return -EPERM; |
| 474 | if (len > XFS_XATTR_SIZE_MAX) |
| 475 | return -EINVAL; |
| 476 | |
| 477 | kbuf = memdup_user(ubuf, len); |
| 478 | if (IS_ERR(kbuf)) |
| 479 | return PTR_ERR(kbuf); |
| 480 | |
| 481 | error = xfs_attr_set(XFS_I(inode), name, kbuf, len, flags); |
| 482 | if (!error) |
| 483 | xfs_forget_acl(inode, name, flags); |
| 484 | kfree(kbuf); |
| 485 | return error; |
| 486 | } |
| 487 | |
| 488 | int |
| 489 | xfs_attrmulti_attr_remove( |
| 490 | struct inode *inode, |
| 491 | unsigned char *name, |
| 492 | __uint32_t flags) |
| 493 | { |
| 494 | int error; |
| 495 | |
| 496 | if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) |
| 497 | return -EPERM; |
| 498 | error = xfs_attr_remove(XFS_I(inode), name, flags); |
| 499 | if (!error) |
| 500 | xfs_forget_acl(inode, name, flags); |
| 501 | return error; |
| 502 | } |
| 503 | |
| 504 | STATIC int |
| 505 | xfs_attrmulti_by_handle( |
| 506 | struct file *parfilp, |
| 507 | void __user *arg) |
| 508 | { |
| 509 | int error; |
| 510 | xfs_attr_multiop_t *ops; |
| 511 | xfs_fsop_attrmulti_handlereq_t am_hreq; |
| 512 | struct dentry *dentry; |
| 513 | unsigned int i, size; |
| 514 | unsigned char *attr_name; |
| 515 | |
| 516 | if (!capable(CAP_SYS_ADMIN)) |
| 517 | return -EPERM; |
| 518 | if (copy_from_user(&am_hreq, arg, sizeof(xfs_fsop_attrmulti_handlereq_t))) |
| 519 | return -EFAULT; |
| 520 | |
| 521 | /* overflow check */ |
| 522 | if (am_hreq.opcount >= INT_MAX / sizeof(xfs_attr_multiop_t)) |
| 523 | return -E2BIG; |
| 524 | |
| 525 | dentry = xfs_handlereq_to_dentry(parfilp, &am_hreq.hreq); |
| 526 | if (IS_ERR(dentry)) |
| 527 | return PTR_ERR(dentry); |
| 528 | |
| 529 | error = -E2BIG; |
| 530 | size = am_hreq.opcount * sizeof(xfs_attr_multiop_t); |
| 531 | if (!size || size > 16 * PAGE_SIZE) |
| 532 | goto out_dput; |
| 533 | |
| 534 | ops = memdup_user(am_hreq.ops, size); |
| 535 | if (IS_ERR(ops)) { |
| 536 | error = PTR_ERR(ops); |
| 537 | goto out_dput; |
| 538 | } |
| 539 | |
| 540 | error = -ENOMEM; |
| 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 | d_inode(dentry), 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 | d_inode(dentry), 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 | d_inode(dentry), 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 = -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 | struct iattr iattr; |
| 606 | enum xfs_prealloc_flags flags = 0; |
| 607 | uint iolock = XFS_IOLOCK_EXCL; |
| 608 | int error; |
| 609 | |
| 610 | /* |
| 611 | * Only allow the sys admin to reserve space unless |
| 612 | * unwritten extents are enabled. |
| 613 | */ |
| 614 | if (!xfs_sb_version_hasextflgbit(&ip->i_mount->m_sb) && |
| 615 | !capable(CAP_SYS_ADMIN)) |
| 616 | return -EPERM; |
| 617 | |
| 618 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) |
| 619 | return -EPERM; |
| 620 | |
| 621 | if (!(filp->f_mode & FMODE_WRITE)) |
| 622 | return -EBADF; |
| 623 | |
| 624 | if (!S_ISREG(inode->i_mode)) |
| 625 | return -EINVAL; |
| 626 | |
| 627 | if (filp->f_flags & O_DSYNC) |
| 628 | flags |= XFS_PREALLOC_SYNC; |
| 629 | if (ioflags & XFS_IO_INVIS) |
| 630 | flags |= XFS_PREALLOC_INVISIBLE; |
| 631 | |
| 632 | error = mnt_want_write_file(filp); |
| 633 | if (error) |
| 634 | return error; |
| 635 | |
| 636 | xfs_ilock(ip, iolock); |
| 637 | error = xfs_break_layouts(inode, &iolock, false); |
| 638 | if (error) |
| 639 | goto out_unlock; |
| 640 | |
| 641 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
| 642 | iolock |= XFS_MMAPLOCK_EXCL; |
| 643 | |
| 644 | switch (bf->l_whence) { |
| 645 | case 0: /*SEEK_SET*/ |
| 646 | break; |
| 647 | case 1: /*SEEK_CUR*/ |
| 648 | bf->l_start += filp->f_pos; |
| 649 | break; |
| 650 | case 2: /*SEEK_END*/ |
| 651 | bf->l_start += XFS_ISIZE(ip); |
| 652 | break; |
| 653 | default: |
| 654 | error = -EINVAL; |
| 655 | goto out_unlock; |
| 656 | } |
| 657 | |
| 658 | /* |
| 659 | * length of <= 0 for resv/unresv/zero is invalid. length for |
| 660 | * alloc/free is ignored completely and we have no idea what userspace |
| 661 | * might have set it to, so set it to zero to allow range |
| 662 | * checks to pass. |
| 663 | */ |
| 664 | switch (cmd) { |
| 665 | case XFS_IOC_ZERO_RANGE: |
| 666 | case XFS_IOC_RESVSP: |
| 667 | case XFS_IOC_RESVSP64: |
| 668 | case XFS_IOC_UNRESVSP: |
| 669 | case XFS_IOC_UNRESVSP64: |
| 670 | if (bf->l_len <= 0) { |
| 671 | error = -EINVAL; |
| 672 | goto out_unlock; |
| 673 | } |
| 674 | break; |
| 675 | default: |
| 676 | bf->l_len = 0; |
| 677 | break; |
| 678 | } |
| 679 | |
| 680 | if (bf->l_start < 0 || |
| 681 | bf->l_start > inode->i_sb->s_maxbytes || |
| 682 | bf->l_start + bf->l_len < 0 || |
| 683 | bf->l_start + bf->l_len >= inode->i_sb->s_maxbytes) { |
| 684 | error = -EINVAL; |
| 685 | goto out_unlock; |
| 686 | } |
| 687 | |
| 688 | switch (cmd) { |
| 689 | case XFS_IOC_ZERO_RANGE: |
| 690 | flags |= XFS_PREALLOC_SET; |
| 691 | error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); |
| 692 | break; |
| 693 | case XFS_IOC_RESVSP: |
| 694 | case XFS_IOC_RESVSP64: |
| 695 | flags |= XFS_PREALLOC_SET; |
| 696 | error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, |
| 697 | XFS_BMAPI_PREALLOC); |
| 698 | break; |
| 699 | case XFS_IOC_UNRESVSP: |
| 700 | case XFS_IOC_UNRESVSP64: |
| 701 | error = xfs_free_file_space(ip, bf->l_start, bf->l_len); |
| 702 | break; |
| 703 | case XFS_IOC_ALLOCSP: |
| 704 | case XFS_IOC_ALLOCSP64: |
| 705 | case XFS_IOC_FREESP: |
| 706 | case XFS_IOC_FREESP64: |
| 707 | flags |= XFS_PREALLOC_CLEAR; |
| 708 | if (bf->l_start > XFS_ISIZE(ip)) { |
| 709 | error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), |
| 710 | bf->l_start - XFS_ISIZE(ip), 0); |
| 711 | if (error) |
| 712 | goto out_unlock; |
| 713 | } |
| 714 | |
| 715 | iattr.ia_valid = ATTR_SIZE; |
| 716 | iattr.ia_size = bf->l_start; |
| 717 | |
| 718 | error = xfs_setattr_size(ip, &iattr); |
| 719 | break; |
| 720 | default: |
| 721 | ASSERT(0); |
| 722 | error = -EINVAL; |
| 723 | } |
| 724 | |
| 725 | if (error) |
| 726 | goto out_unlock; |
| 727 | |
| 728 | error = xfs_update_prealloc_flags(ip, flags); |
| 729 | |
| 730 | out_unlock: |
| 731 | xfs_iunlock(ip, iolock); |
| 732 | mnt_drop_write_file(filp); |
| 733 | return error; |
| 734 | } |
| 735 | |
| 736 | STATIC int |
| 737 | xfs_ioc_bulkstat( |
| 738 | xfs_mount_t *mp, |
| 739 | unsigned int cmd, |
| 740 | void __user *arg) |
| 741 | { |
| 742 | xfs_fsop_bulkreq_t bulkreq; |
| 743 | int count; /* # of records returned */ |
| 744 | xfs_ino_t inlast; /* last inode number */ |
| 745 | int done; |
| 746 | int error; |
| 747 | |
| 748 | /* done = 1 if there are more stats to get and if bulkstat */ |
| 749 | /* should be called again (unused here, but used in dmapi) */ |
| 750 | |
| 751 | if (!capable(CAP_SYS_ADMIN)) |
| 752 | return -EPERM; |
| 753 | |
| 754 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 755 | return -EIO; |
| 756 | |
| 757 | if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t))) |
| 758 | return -EFAULT; |
| 759 | |
| 760 | if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64))) |
| 761 | return -EFAULT; |
| 762 | |
| 763 | if ((count = bulkreq.icount) <= 0) |
| 764 | return -EINVAL; |
| 765 | |
| 766 | if (bulkreq.ubuffer == NULL) |
| 767 | return -EINVAL; |
| 768 | |
| 769 | if (cmd == XFS_IOC_FSINUMBERS) |
| 770 | error = xfs_inumbers(mp, &inlast, &count, |
| 771 | bulkreq.ubuffer, xfs_inumbers_fmt); |
| 772 | else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) |
| 773 | error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer, |
| 774 | sizeof(xfs_bstat_t), NULL, &done); |
| 775 | else /* XFS_IOC_FSBULKSTAT */ |
| 776 | error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one, |
| 777 | sizeof(xfs_bstat_t), bulkreq.ubuffer, |
| 778 | &done); |
| 779 | |
| 780 | if (error) |
| 781 | return error; |
| 782 | |
| 783 | if (bulkreq.ocount != NULL) { |
| 784 | if (copy_to_user(bulkreq.lastip, &inlast, |
| 785 | sizeof(xfs_ino_t))) |
| 786 | return -EFAULT; |
| 787 | |
| 788 | if (copy_to_user(bulkreq.ocount, &count, sizeof(count))) |
| 789 | return -EFAULT; |
| 790 | } |
| 791 | |
| 792 | return 0; |
| 793 | } |
| 794 | |
| 795 | STATIC int |
| 796 | xfs_ioc_fsgeometry_v1( |
| 797 | xfs_mount_t *mp, |
| 798 | void __user *arg) |
| 799 | { |
| 800 | xfs_fsop_geom_t fsgeo; |
| 801 | int error; |
| 802 | |
| 803 | error = xfs_fs_geometry(mp, &fsgeo, 3); |
| 804 | if (error) |
| 805 | return error; |
| 806 | |
| 807 | /* |
| 808 | * Caller should have passed an argument of type |
| 809 | * xfs_fsop_geom_v1_t. This is a proper subset of the |
| 810 | * xfs_fsop_geom_t that xfs_fs_geometry() fills in. |
| 811 | */ |
| 812 | if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t))) |
| 813 | return -EFAULT; |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | STATIC int |
| 818 | xfs_ioc_fsgeometry( |
| 819 | xfs_mount_t *mp, |
| 820 | void __user *arg) |
| 821 | { |
| 822 | xfs_fsop_geom_t fsgeo; |
| 823 | int error; |
| 824 | |
| 825 | error = xfs_fs_geometry(mp, &fsgeo, 4); |
| 826 | if (error) |
| 827 | return error; |
| 828 | |
| 829 | if (copy_to_user(arg, &fsgeo, sizeof(fsgeo))) |
| 830 | return -EFAULT; |
| 831 | return 0; |
| 832 | } |
| 833 | |
| 834 | /* |
| 835 | * Linux extended inode flags interface. |
| 836 | */ |
| 837 | |
| 838 | STATIC unsigned int |
| 839 | xfs_merge_ioc_xflags( |
| 840 | unsigned int flags, |
| 841 | unsigned int start) |
| 842 | { |
| 843 | unsigned int xflags = start; |
| 844 | |
| 845 | if (flags & FS_IMMUTABLE_FL) |
| 846 | xflags |= FS_XFLAG_IMMUTABLE; |
| 847 | else |
| 848 | xflags &= ~FS_XFLAG_IMMUTABLE; |
| 849 | if (flags & FS_APPEND_FL) |
| 850 | xflags |= FS_XFLAG_APPEND; |
| 851 | else |
| 852 | xflags &= ~FS_XFLAG_APPEND; |
| 853 | if (flags & FS_SYNC_FL) |
| 854 | xflags |= FS_XFLAG_SYNC; |
| 855 | else |
| 856 | xflags &= ~FS_XFLAG_SYNC; |
| 857 | if (flags & FS_NOATIME_FL) |
| 858 | xflags |= FS_XFLAG_NOATIME; |
| 859 | else |
| 860 | xflags &= ~FS_XFLAG_NOATIME; |
| 861 | if (flags & FS_NODUMP_FL) |
| 862 | xflags |= FS_XFLAG_NODUMP; |
| 863 | else |
| 864 | xflags &= ~FS_XFLAG_NODUMP; |
| 865 | |
| 866 | return xflags; |
| 867 | } |
| 868 | |
| 869 | STATIC unsigned int |
| 870 | xfs_di2lxflags( |
| 871 | __uint16_t di_flags) |
| 872 | { |
| 873 | unsigned int flags = 0; |
| 874 | |
| 875 | if (di_flags & XFS_DIFLAG_IMMUTABLE) |
| 876 | flags |= FS_IMMUTABLE_FL; |
| 877 | if (di_flags & XFS_DIFLAG_APPEND) |
| 878 | flags |= FS_APPEND_FL; |
| 879 | if (di_flags & XFS_DIFLAG_SYNC) |
| 880 | flags |= FS_SYNC_FL; |
| 881 | if (di_flags & XFS_DIFLAG_NOATIME) |
| 882 | flags |= FS_NOATIME_FL; |
| 883 | if (di_flags & XFS_DIFLAG_NODUMP) |
| 884 | flags |= FS_NODUMP_FL; |
| 885 | return flags; |
| 886 | } |
| 887 | |
| 888 | STATIC int |
| 889 | xfs_ioc_fsgetxattr( |
| 890 | xfs_inode_t *ip, |
| 891 | int attr, |
| 892 | void __user *arg) |
| 893 | { |
| 894 | struct fsxattr fa; |
| 895 | |
| 896 | memset(&fa, 0, sizeof(struct fsxattr)); |
| 897 | |
| 898 | xfs_ilock(ip, XFS_ILOCK_SHARED); |
| 899 | fa.fsx_xflags = xfs_ip2xflags(ip); |
| 900 | fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog; |
| 901 | fa.fsx_projid = xfs_get_projid(ip); |
| 902 | |
| 903 | if (attr) { |
| 904 | if (ip->i_afp) { |
| 905 | if (ip->i_afp->if_flags & XFS_IFEXTENTS) |
| 906 | fa.fsx_nextents = ip->i_afp->if_bytes / |
| 907 | sizeof(xfs_bmbt_rec_t); |
| 908 | else |
| 909 | fa.fsx_nextents = ip->i_d.di_anextents; |
| 910 | } else |
| 911 | fa.fsx_nextents = 0; |
| 912 | } else { |
| 913 | if (ip->i_df.if_flags & XFS_IFEXTENTS) |
| 914 | fa.fsx_nextents = ip->i_df.if_bytes / |
| 915 | sizeof(xfs_bmbt_rec_t); |
| 916 | else |
| 917 | fa.fsx_nextents = ip->i_d.di_nextents; |
| 918 | } |
| 919 | xfs_iunlock(ip, XFS_ILOCK_SHARED); |
| 920 | |
| 921 | if (copy_to_user(arg, &fa, sizeof(fa))) |
| 922 | return -EFAULT; |
| 923 | return 0; |
| 924 | } |
| 925 | |
| 926 | STATIC void |
| 927 | xfs_set_diflags( |
| 928 | struct xfs_inode *ip, |
| 929 | unsigned int xflags) |
| 930 | { |
| 931 | unsigned int di_flags; |
| 932 | uint64_t di_flags2; |
| 933 | |
| 934 | /* can't set PREALLOC this way, just preserve it */ |
| 935 | di_flags = (ip->i_d.di_flags & XFS_DIFLAG_PREALLOC); |
| 936 | if (xflags & FS_XFLAG_IMMUTABLE) |
| 937 | di_flags |= XFS_DIFLAG_IMMUTABLE; |
| 938 | if (xflags & FS_XFLAG_APPEND) |
| 939 | di_flags |= XFS_DIFLAG_APPEND; |
| 940 | if (xflags & FS_XFLAG_SYNC) |
| 941 | di_flags |= XFS_DIFLAG_SYNC; |
| 942 | if (xflags & FS_XFLAG_NOATIME) |
| 943 | di_flags |= XFS_DIFLAG_NOATIME; |
| 944 | if (xflags & FS_XFLAG_NODUMP) |
| 945 | di_flags |= XFS_DIFLAG_NODUMP; |
| 946 | if (xflags & FS_XFLAG_NODEFRAG) |
| 947 | di_flags |= XFS_DIFLAG_NODEFRAG; |
| 948 | if (xflags & FS_XFLAG_FILESTREAM) |
| 949 | di_flags |= XFS_DIFLAG_FILESTREAM; |
| 950 | if (S_ISDIR(VFS_I(ip)->i_mode)) { |
| 951 | if (xflags & FS_XFLAG_RTINHERIT) |
| 952 | di_flags |= XFS_DIFLAG_RTINHERIT; |
| 953 | if (xflags & FS_XFLAG_NOSYMLINKS) |
| 954 | di_flags |= XFS_DIFLAG_NOSYMLINKS; |
| 955 | if (xflags & FS_XFLAG_EXTSZINHERIT) |
| 956 | di_flags |= XFS_DIFLAG_EXTSZINHERIT; |
| 957 | if (xflags & FS_XFLAG_PROJINHERIT) |
| 958 | di_flags |= XFS_DIFLAG_PROJINHERIT; |
| 959 | } else if (S_ISREG(VFS_I(ip)->i_mode)) { |
| 960 | if (xflags & FS_XFLAG_REALTIME) |
| 961 | di_flags |= XFS_DIFLAG_REALTIME; |
| 962 | if (xflags & FS_XFLAG_EXTSIZE) |
| 963 | di_flags |= XFS_DIFLAG_EXTSIZE; |
| 964 | } |
| 965 | ip->i_d.di_flags = di_flags; |
| 966 | |
| 967 | /* diflags2 only valid for v3 inodes. */ |
| 968 | if (ip->i_d.di_version < 3) |
| 969 | return; |
| 970 | |
| 971 | di_flags2 = 0; |
| 972 | if (xflags & FS_XFLAG_DAX) |
| 973 | di_flags2 |= XFS_DIFLAG2_DAX; |
| 974 | |
| 975 | ip->i_d.di_flags2 = di_flags2; |
| 976 | |
| 977 | } |
| 978 | |
| 979 | STATIC void |
| 980 | xfs_diflags_to_linux( |
| 981 | struct xfs_inode *ip) |
| 982 | { |
| 983 | struct inode *inode = VFS_I(ip); |
| 984 | unsigned int xflags = xfs_ip2xflags(ip); |
| 985 | |
| 986 | if (xflags & FS_XFLAG_IMMUTABLE) |
| 987 | inode->i_flags |= S_IMMUTABLE; |
| 988 | else |
| 989 | inode->i_flags &= ~S_IMMUTABLE; |
| 990 | if (xflags & FS_XFLAG_APPEND) |
| 991 | inode->i_flags |= S_APPEND; |
| 992 | else |
| 993 | inode->i_flags &= ~S_APPEND; |
| 994 | if (xflags & FS_XFLAG_SYNC) |
| 995 | inode->i_flags |= S_SYNC; |
| 996 | else |
| 997 | inode->i_flags &= ~S_SYNC; |
| 998 | if (xflags & FS_XFLAG_NOATIME) |
| 999 | inode->i_flags |= S_NOATIME; |
| 1000 | else |
| 1001 | inode->i_flags &= ~S_NOATIME; |
| 1002 | if (xflags & FS_XFLAG_DAX) |
| 1003 | inode->i_flags |= S_DAX; |
| 1004 | else |
| 1005 | inode->i_flags &= ~S_DAX; |
| 1006 | |
| 1007 | } |
| 1008 | |
| 1009 | static int |
| 1010 | xfs_ioctl_setattr_xflags( |
| 1011 | struct xfs_trans *tp, |
| 1012 | struct xfs_inode *ip, |
| 1013 | struct fsxattr *fa) |
| 1014 | { |
| 1015 | struct xfs_mount *mp = ip->i_mount; |
| 1016 | |
| 1017 | /* Can't change realtime flag if any extents are allocated. */ |
| 1018 | if ((ip->i_d.di_nextents || ip->i_delayed_blks) && |
| 1019 | XFS_IS_REALTIME_INODE(ip) != (fa->fsx_xflags & FS_XFLAG_REALTIME)) |
| 1020 | return -EINVAL; |
| 1021 | |
| 1022 | /* If realtime flag is set then must have realtime device */ |
| 1023 | if (fa->fsx_xflags & FS_XFLAG_REALTIME) { |
| 1024 | if (mp->m_sb.sb_rblocks == 0 || mp->m_sb.sb_rextsize == 0 || |
| 1025 | (ip->i_d.di_extsize % mp->m_sb.sb_rextsize)) |
| 1026 | return -EINVAL; |
| 1027 | } |
| 1028 | |
| 1029 | /* |
| 1030 | * Can't modify an immutable/append-only file unless |
| 1031 | * we have appropriate permission. |
| 1032 | */ |
| 1033 | if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) || |
| 1034 | (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) && |
| 1035 | !capable(CAP_LINUX_IMMUTABLE)) |
| 1036 | return -EPERM; |
| 1037 | |
| 1038 | xfs_set_diflags(ip, fa->fsx_xflags); |
| 1039 | xfs_diflags_to_linux(ip); |
| 1040 | xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_CHG); |
| 1041 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 1042 | XFS_STATS_INC(mp, xs_ig_attrchg); |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | /* |
| 1047 | * If we are changing DAX flags, we have to ensure the file is clean and any |
| 1048 | * cached objects in the address space are invalidated and removed. This |
| 1049 | * requires us to lock out other IO and page faults similar to a truncate |
| 1050 | * operation. The locks need to be held until the transaction has been committed |
| 1051 | * so that the cache invalidation is atomic with respect to the DAX flag |
| 1052 | * manipulation. |
| 1053 | */ |
| 1054 | static int |
| 1055 | xfs_ioctl_setattr_dax_invalidate( |
| 1056 | struct xfs_inode *ip, |
| 1057 | struct fsxattr *fa, |
| 1058 | int *join_flags) |
| 1059 | { |
| 1060 | struct inode *inode = VFS_I(ip); |
| 1061 | int error; |
| 1062 | |
| 1063 | *join_flags = 0; |
| 1064 | |
| 1065 | /* |
| 1066 | * It is only valid to set the DAX flag on regular files and |
| 1067 | * directories on filesystems where the block size is equal to the page |
| 1068 | * size. On directories it serves as an inherit hint. |
| 1069 | */ |
| 1070 | if (fa->fsx_xflags & FS_XFLAG_DAX) { |
| 1071 | if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode))) |
| 1072 | return -EINVAL; |
| 1073 | if (ip->i_mount->m_sb.sb_blocksize != PAGE_SIZE) |
| 1074 | return -EINVAL; |
| 1075 | } |
| 1076 | |
| 1077 | /* If the DAX state is not changing, we have nothing to do here. */ |
| 1078 | if ((fa->fsx_xflags & FS_XFLAG_DAX) && IS_DAX(inode)) |
| 1079 | return 0; |
| 1080 | if (!(fa->fsx_xflags & FS_XFLAG_DAX) && !IS_DAX(inode)) |
| 1081 | return 0; |
| 1082 | |
| 1083 | /* lock, flush and invalidate mapping in preparation for flag change */ |
| 1084 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1085 | error = filemap_write_and_wait(inode->i_mapping); |
| 1086 | if (error) |
| 1087 | goto out_unlock; |
| 1088 | error = invalidate_inode_pages2(inode->i_mapping); |
| 1089 | if (error) |
| 1090 | goto out_unlock; |
| 1091 | |
| 1092 | *join_flags = XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL; |
| 1093 | return 0; |
| 1094 | |
| 1095 | out_unlock: |
| 1096 | xfs_iunlock(ip, XFS_MMAPLOCK_EXCL | XFS_IOLOCK_EXCL); |
| 1097 | return error; |
| 1098 | |
| 1099 | } |
| 1100 | |
| 1101 | /* |
| 1102 | * Set up the transaction structure for the setattr operation, checking that we |
| 1103 | * have permission to do so. On success, return a clean transaction and the |
| 1104 | * inode locked exclusively ready for further operation specific checks. On |
| 1105 | * failure, return an error without modifying or locking the inode. |
| 1106 | * |
| 1107 | * The inode might already be IO locked on call. If this is the case, it is |
| 1108 | * indicated in @join_flags and we take full responsibility for ensuring they |
| 1109 | * are unlocked from now on. Hence if we have an error here, we still have to |
| 1110 | * unlock them. Otherwise, once they are joined to the transaction, they will |
| 1111 | * be unlocked on commit/cancel. |
| 1112 | */ |
| 1113 | static struct xfs_trans * |
| 1114 | xfs_ioctl_setattr_get_trans( |
| 1115 | struct xfs_inode *ip, |
| 1116 | int join_flags) |
| 1117 | { |
| 1118 | struct xfs_mount *mp = ip->i_mount; |
| 1119 | struct xfs_trans *tp; |
| 1120 | int error = -EROFS; |
| 1121 | |
| 1122 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 1123 | goto out_unlock; |
| 1124 | error = -EIO; |
| 1125 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 1126 | goto out_unlock; |
| 1127 | |
| 1128 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
| 1129 | if (error) |
| 1130 | return ERR_PTR(error); |
| 1131 | |
| 1132 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 1133 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags); |
| 1134 | join_flags = 0; |
| 1135 | |
| 1136 | /* |
| 1137 | * CAP_FOWNER overrides the following restrictions: |
| 1138 | * |
| 1139 | * The user ID of the calling process must be equal to the file owner |
| 1140 | * ID, except in cases where the CAP_FSETID capability is applicable. |
| 1141 | */ |
| 1142 | if (!inode_owner_or_capable(VFS_I(ip))) { |
| 1143 | error = -EPERM; |
| 1144 | goto out_cancel; |
| 1145 | } |
| 1146 | |
| 1147 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 1148 | xfs_trans_set_sync(tp); |
| 1149 | |
| 1150 | return tp; |
| 1151 | |
| 1152 | out_cancel: |
| 1153 | xfs_trans_cancel(tp); |
| 1154 | out_unlock: |
| 1155 | if (join_flags) |
| 1156 | xfs_iunlock(ip, join_flags); |
| 1157 | return ERR_PTR(error); |
| 1158 | } |
| 1159 | |
| 1160 | /* |
| 1161 | * extent size hint validation is somewhat cumbersome. Rules are: |
| 1162 | * |
| 1163 | * 1. extent size hint is only valid for directories and regular files |
| 1164 | * 2. FS_XFLAG_EXTSIZE is only valid for regular files |
| 1165 | * 3. FS_XFLAG_EXTSZINHERIT is only valid for directories. |
| 1166 | * 4. can only be changed on regular files if no extents are allocated |
| 1167 | * 5. can be changed on directories at any time |
| 1168 | * 6. extsize hint of 0 turns off hints, clears inode flags. |
| 1169 | * 7. Extent size must be a multiple of the appropriate block size. |
| 1170 | * 8. for non-realtime files, the extent size hint must be limited |
| 1171 | * to half the AG size to avoid alignment extending the extent beyond the |
| 1172 | * limits of the AG. |
| 1173 | */ |
| 1174 | static int |
| 1175 | xfs_ioctl_setattr_check_extsize( |
| 1176 | struct xfs_inode *ip, |
| 1177 | struct fsxattr *fa) |
| 1178 | { |
| 1179 | struct xfs_mount *mp = ip->i_mount; |
| 1180 | |
| 1181 | if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode)) |
| 1182 | return -EINVAL; |
| 1183 | |
| 1184 | if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) && |
| 1185 | !S_ISDIR(VFS_I(ip)->i_mode)) |
| 1186 | return -EINVAL; |
| 1187 | |
| 1188 | if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents && |
| 1189 | ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize)) |
| 1190 | return -EINVAL; |
| 1191 | |
| 1192 | if (fa->fsx_extsize != 0) { |
| 1193 | xfs_extlen_t size; |
| 1194 | xfs_fsblock_t extsize_fsb; |
| 1195 | |
| 1196 | extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize); |
| 1197 | if (extsize_fsb > MAXEXTLEN) |
| 1198 | return -EINVAL; |
| 1199 | |
| 1200 | if (XFS_IS_REALTIME_INODE(ip) || |
| 1201 | (fa->fsx_xflags & FS_XFLAG_REALTIME)) { |
| 1202 | size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog; |
| 1203 | } else { |
| 1204 | size = mp->m_sb.sb_blocksize; |
| 1205 | if (extsize_fsb > mp->m_sb.sb_agblocks / 2) |
| 1206 | return -EINVAL; |
| 1207 | } |
| 1208 | |
| 1209 | if (fa->fsx_extsize % size) |
| 1210 | return -EINVAL; |
| 1211 | } else |
| 1212 | fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT); |
| 1213 | |
| 1214 | return 0; |
| 1215 | } |
| 1216 | |
| 1217 | static int |
| 1218 | xfs_ioctl_setattr_check_projid( |
| 1219 | struct xfs_inode *ip, |
| 1220 | struct fsxattr *fa) |
| 1221 | { |
| 1222 | /* Disallow 32bit project ids if projid32bit feature is not enabled. */ |
| 1223 | if (fa->fsx_projid > (__uint16_t)-1 && |
| 1224 | !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb)) |
| 1225 | return -EINVAL; |
| 1226 | |
| 1227 | /* |
| 1228 | * Project Quota ID state is only allowed to change from within the init |
| 1229 | * namespace. Enforce that restriction only if we are trying to change |
| 1230 | * the quota ID state. Everything else is allowed in user namespaces. |
| 1231 | */ |
| 1232 | if (current_user_ns() == &init_user_ns) |
| 1233 | return 0; |
| 1234 | |
| 1235 | if (xfs_get_projid(ip) != fa->fsx_projid) |
| 1236 | return -EINVAL; |
| 1237 | if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) != |
| 1238 | (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)) |
| 1239 | return -EINVAL; |
| 1240 | |
| 1241 | return 0; |
| 1242 | } |
| 1243 | |
| 1244 | STATIC int |
| 1245 | xfs_ioctl_setattr( |
| 1246 | xfs_inode_t *ip, |
| 1247 | struct fsxattr *fa) |
| 1248 | { |
| 1249 | struct xfs_mount *mp = ip->i_mount; |
| 1250 | struct xfs_trans *tp; |
| 1251 | struct xfs_dquot *udqp = NULL; |
| 1252 | struct xfs_dquot *pdqp = NULL; |
| 1253 | struct xfs_dquot *olddquot = NULL; |
| 1254 | int code; |
| 1255 | int join_flags = 0; |
| 1256 | |
| 1257 | trace_xfs_ioctl_setattr(ip); |
| 1258 | |
| 1259 | code = xfs_ioctl_setattr_check_projid(ip, fa); |
| 1260 | if (code) |
| 1261 | return code; |
| 1262 | |
| 1263 | /* |
| 1264 | * If disk quotas is on, we make sure that the dquots do exist on disk, |
| 1265 | * before we start any other transactions. Trying to do this later |
| 1266 | * is messy. We don't care to take a readlock to look at the ids |
| 1267 | * in inode here, because we can't hold it across the trans_reserve. |
| 1268 | * If the IDs do change before we take the ilock, we're covered |
| 1269 | * because the i_*dquot fields will get updated anyway. |
| 1270 | */ |
| 1271 | if (XFS_IS_QUOTA_ON(mp)) { |
| 1272 | code = xfs_qm_vop_dqalloc(ip, ip->i_d.di_uid, |
| 1273 | ip->i_d.di_gid, fa->fsx_projid, |
| 1274 | XFS_QMOPT_PQUOTA, &udqp, NULL, &pdqp); |
| 1275 | if (code) |
| 1276 | return code; |
| 1277 | } |
| 1278 | |
| 1279 | /* |
| 1280 | * Changing DAX config may require inode locking for mapping |
| 1281 | * invalidation. These need to be held all the way to transaction commit |
| 1282 | * or cancel time, so need to be passed through to |
| 1283 | * xfs_ioctl_setattr_get_trans() so it can apply them to the join call |
| 1284 | * appropriately. |
| 1285 | */ |
| 1286 | code = xfs_ioctl_setattr_dax_invalidate(ip, fa, &join_flags); |
| 1287 | if (code) |
| 1288 | goto error_free_dquots; |
| 1289 | |
| 1290 | tp = xfs_ioctl_setattr_get_trans(ip, join_flags); |
| 1291 | if (IS_ERR(tp)) { |
| 1292 | code = PTR_ERR(tp); |
| 1293 | goto error_free_dquots; |
| 1294 | } |
| 1295 | |
| 1296 | |
| 1297 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) && |
| 1298 | xfs_get_projid(ip) != fa->fsx_projid) { |
| 1299 | code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp, |
| 1300 | capable(CAP_FOWNER) ? XFS_QMOPT_FORCE_RES : 0); |
| 1301 | if (code) /* out of quota */ |
| 1302 | goto error_trans_cancel; |
| 1303 | } |
| 1304 | |
| 1305 | code = xfs_ioctl_setattr_check_extsize(ip, fa); |
| 1306 | if (code) |
| 1307 | goto error_trans_cancel; |
| 1308 | |
| 1309 | code = xfs_ioctl_setattr_xflags(tp, ip, fa); |
| 1310 | if (code) |
| 1311 | goto error_trans_cancel; |
| 1312 | |
| 1313 | /* |
| 1314 | * Change file ownership. Must be the owner or privileged. CAP_FSETID |
| 1315 | * overrides the following restrictions: |
| 1316 | * |
| 1317 | * The set-user-ID and set-group-ID bits of a file will be cleared upon |
| 1318 | * successful return from chown() |
| 1319 | */ |
| 1320 | |
| 1321 | if ((VFS_I(ip)->i_mode & (S_ISUID|S_ISGID)) && |
| 1322 | !capable_wrt_inode_uidgid(VFS_I(ip), CAP_FSETID)) |
| 1323 | VFS_I(ip)->i_mode &= ~(S_ISUID|S_ISGID); |
| 1324 | |
| 1325 | /* Change the ownerships and register project quota modifications */ |
| 1326 | if (xfs_get_projid(ip) != fa->fsx_projid) { |
| 1327 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp)) { |
| 1328 | olddquot = xfs_qm_vop_chown(tp, ip, |
| 1329 | &ip->i_pdquot, pdqp); |
| 1330 | } |
| 1331 | ASSERT(ip->i_d.di_version > 1); |
| 1332 | xfs_set_projid(ip, fa->fsx_projid); |
| 1333 | } |
| 1334 | |
| 1335 | /* |
| 1336 | * Only set the extent size hint if we've already determined that the |
| 1337 | * extent size hint should be set on the inode. If no extent size flags |
| 1338 | * are set on the inode then unconditionally clear the extent size hint. |
| 1339 | */ |
| 1340 | if (ip->i_d.di_flags & (XFS_DIFLAG_EXTSIZE | XFS_DIFLAG_EXTSZINHERIT)) |
| 1341 | ip->i_d.di_extsize = fa->fsx_extsize >> mp->m_sb.sb_blocklog; |
| 1342 | else |
| 1343 | ip->i_d.di_extsize = 0; |
| 1344 | |
| 1345 | code = xfs_trans_commit(tp); |
| 1346 | |
| 1347 | /* |
| 1348 | * Release any dquot(s) the inode had kept before chown. |
| 1349 | */ |
| 1350 | xfs_qm_dqrele(olddquot); |
| 1351 | xfs_qm_dqrele(udqp); |
| 1352 | xfs_qm_dqrele(pdqp); |
| 1353 | |
| 1354 | return code; |
| 1355 | |
| 1356 | error_trans_cancel: |
| 1357 | xfs_trans_cancel(tp); |
| 1358 | error_free_dquots: |
| 1359 | xfs_qm_dqrele(udqp); |
| 1360 | xfs_qm_dqrele(pdqp); |
| 1361 | return code; |
| 1362 | } |
| 1363 | |
| 1364 | STATIC int |
| 1365 | xfs_ioc_fssetxattr( |
| 1366 | xfs_inode_t *ip, |
| 1367 | struct file *filp, |
| 1368 | void __user *arg) |
| 1369 | { |
| 1370 | struct fsxattr fa; |
| 1371 | int error; |
| 1372 | |
| 1373 | if (copy_from_user(&fa, arg, sizeof(fa))) |
| 1374 | return -EFAULT; |
| 1375 | |
| 1376 | error = mnt_want_write_file(filp); |
| 1377 | if (error) |
| 1378 | return error; |
| 1379 | error = xfs_ioctl_setattr(ip, &fa); |
| 1380 | mnt_drop_write_file(filp); |
| 1381 | return error; |
| 1382 | } |
| 1383 | |
| 1384 | STATIC int |
| 1385 | xfs_ioc_getxflags( |
| 1386 | xfs_inode_t *ip, |
| 1387 | void __user *arg) |
| 1388 | { |
| 1389 | unsigned int flags; |
| 1390 | |
| 1391 | flags = xfs_di2lxflags(ip->i_d.di_flags); |
| 1392 | if (copy_to_user(arg, &flags, sizeof(flags))) |
| 1393 | return -EFAULT; |
| 1394 | return 0; |
| 1395 | } |
| 1396 | |
| 1397 | STATIC int |
| 1398 | xfs_ioc_setxflags( |
| 1399 | struct xfs_inode *ip, |
| 1400 | struct file *filp, |
| 1401 | void __user *arg) |
| 1402 | { |
| 1403 | struct xfs_trans *tp; |
| 1404 | struct fsxattr fa; |
| 1405 | unsigned int flags; |
| 1406 | int join_flags = 0; |
| 1407 | int error; |
| 1408 | |
| 1409 | if (copy_from_user(&flags, arg, sizeof(flags))) |
| 1410 | return -EFAULT; |
| 1411 | |
| 1412 | if (flags & ~(FS_IMMUTABLE_FL | FS_APPEND_FL | \ |
| 1413 | FS_NOATIME_FL | FS_NODUMP_FL | \ |
| 1414 | FS_SYNC_FL)) |
| 1415 | return -EOPNOTSUPP; |
| 1416 | |
| 1417 | fa.fsx_xflags = xfs_merge_ioc_xflags(flags, xfs_ip2xflags(ip)); |
| 1418 | |
| 1419 | error = mnt_want_write_file(filp); |
| 1420 | if (error) |
| 1421 | return error; |
| 1422 | |
| 1423 | /* |
| 1424 | * Changing DAX config may require inode locking for mapping |
| 1425 | * invalidation. These need to be held all the way to transaction commit |
| 1426 | * or cancel time, so need to be passed through to |
| 1427 | * xfs_ioctl_setattr_get_trans() so it can apply them to the join call |
| 1428 | * appropriately. |
| 1429 | */ |
| 1430 | error = xfs_ioctl_setattr_dax_invalidate(ip, &fa, &join_flags); |
| 1431 | if (error) |
| 1432 | goto out_drop_write; |
| 1433 | |
| 1434 | tp = xfs_ioctl_setattr_get_trans(ip, join_flags); |
| 1435 | if (IS_ERR(tp)) { |
| 1436 | error = PTR_ERR(tp); |
| 1437 | goto out_drop_write; |
| 1438 | } |
| 1439 | |
| 1440 | error = xfs_ioctl_setattr_xflags(tp, ip, &fa); |
| 1441 | if (error) { |
| 1442 | xfs_trans_cancel(tp); |
| 1443 | goto out_drop_write; |
| 1444 | } |
| 1445 | |
| 1446 | error = xfs_trans_commit(tp); |
| 1447 | out_drop_write: |
| 1448 | mnt_drop_write_file(filp); |
| 1449 | return error; |
| 1450 | } |
| 1451 | |
| 1452 | STATIC int |
| 1453 | xfs_getbmap_format(void **ap, struct getbmapx *bmv, int *full) |
| 1454 | { |
| 1455 | struct getbmap __user *base = (struct getbmap __user *)*ap; |
| 1456 | |
| 1457 | /* copy only getbmap portion (not getbmapx) */ |
| 1458 | if (copy_to_user(base, bmv, sizeof(struct getbmap))) |
| 1459 | return -EFAULT; |
| 1460 | |
| 1461 | *ap += sizeof(struct getbmap); |
| 1462 | return 0; |
| 1463 | } |
| 1464 | |
| 1465 | STATIC int |
| 1466 | xfs_ioc_getbmap( |
| 1467 | struct xfs_inode *ip, |
| 1468 | int ioflags, |
| 1469 | unsigned int cmd, |
| 1470 | void __user *arg) |
| 1471 | { |
| 1472 | struct getbmapx bmx; |
| 1473 | int error; |
| 1474 | |
| 1475 | if (copy_from_user(&bmx, arg, sizeof(struct getbmapx))) |
| 1476 | return -EFAULT; |
| 1477 | |
| 1478 | if (bmx.bmv_count < 2) |
| 1479 | return -EINVAL; |
| 1480 | |
| 1481 | bmx.bmv_iflags = (cmd == XFS_IOC_GETBMAPA ? BMV_IF_ATTRFORK : 0); |
| 1482 | if (ioflags & XFS_IO_INVIS) |
| 1483 | bmx.bmv_iflags |= BMV_IF_NO_DMAPI_READ; |
| 1484 | |
| 1485 | error = xfs_getbmap(ip, &bmx, xfs_getbmap_format, |
| 1486 | (__force struct getbmap *)arg+1); |
| 1487 | if (error) |
| 1488 | return error; |
| 1489 | |
| 1490 | /* copy back header - only size of getbmap */ |
| 1491 | if (copy_to_user(arg, &bmx, sizeof(struct getbmap))) |
| 1492 | return -EFAULT; |
| 1493 | return 0; |
| 1494 | } |
| 1495 | |
| 1496 | STATIC int |
| 1497 | xfs_getbmapx_format(void **ap, struct getbmapx *bmv, int *full) |
| 1498 | { |
| 1499 | struct getbmapx __user *base = (struct getbmapx __user *)*ap; |
| 1500 | |
| 1501 | if (copy_to_user(base, bmv, sizeof(struct getbmapx))) |
| 1502 | return -EFAULT; |
| 1503 | |
| 1504 | *ap += sizeof(struct getbmapx); |
| 1505 | return 0; |
| 1506 | } |
| 1507 | |
| 1508 | STATIC int |
| 1509 | xfs_ioc_getbmapx( |
| 1510 | struct xfs_inode *ip, |
| 1511 | void __user *arg) |
| 1512 | { |
| 1513 | struct getbmapx bmx; |
| 1514 | int error; |
| 1515 | |
| 1516 | if (copy_from_user(&bmx, arg, sizeof(bmx))) |
| 1517 | return -EFAULT; |
| 1518 | |
| 1519 | if (bmx.bmv_count < 2) |
| 1520 | return -EINVAL; |
| 1521 | |
| 1522 | if (bmx.bmv_iflags & (~BMV_IF_VALID)) |
| 1523 | return -EINVAL; |
| 1524 | |
| 1525 | error = xfs_getbmap(ip, &bmx, xfs_getbmapx_format, |
| 1526 | (__force struct getbmapx *)arg+1); |
| 1527 | if (error) |
| 1528 | return error; |
| 1529 | |
| 1530 | /* copy back header */ |
| 1531 | if (copy_to_user(arg, &bmx, sizeof(struct getbmapx))) |
| 1532 | return -EFAULT; |
| 1533 | |
| 1534 | return 0; |
| 1535 | } |
| 1536 | |
| 1537 | int |
| 1538 | xfs_ioc_swapext( |
| 1539 | xfs_swapext_t *sxp) |
| 1540 | { |
| 1541 | xfs_inode_t *ip, *tip; |
| 1542 | struct fd f, tmp; |
| 1543 | int error = 0; |
| 1544 | |
| 1545 | /* Pull information for the target fd */ |
| 1546 | f = fdget((int)sxp->sx_fdtarget); |
| 1547 | if (!f.file) { |
| 1548 | error = -EINVAL; |
| 1549 | goto out; |
| 1550 | } |
| 1551 | |
| 1552 | if (!(f.file->f_mode & FMODE_WRITE) || |
| 1553 | !(f.file->f_mode & FMODE_READ) || |
| 1554 | (f.file->f_flags & O_APPEND)) { |
| 1555 | error = -EBADF; |
| 1556 | goto out_put_file; |
| 1557 | } |
| 1558 | |
| 1559 | tmp = fdget((int)sxp->sx_fdtmp); |
| 1560 | if (!tmp.file) { |
| 1561 | error = -EINVAL; |
| 1562 | goto out_put_file; |
| 1563 | } |
| 1564 | |
| 1565 | if (!(tmp.file->f_mode & FMODE_WRITE) || |
| 1566 | !(tmp.file->f_mode & FMODE_READ) || |
| 1567 | (tmp.file->f_flags & O_APPEND)) { |
| 1568 | error = -EBADF; |
| 1569 | goto out_put_tmp_file; |
| 1570 | } |
| 1571 | |
| 1572 | if (IS_SWAPFILE(file_inode(f.file)) || |
| 1573 | IS_SWAPFILE(file_inode(tmp.file))) { |
| 1574 | error = -EINVAL; |
| 1575 | goto out_put_tmp_file; |
| 1576 | } |
| 1577 | |
| 1578 | if (f.file->f_op != &xfs_file_operations || |
| 1579 | tmp.file->f_op != &xfs_file_operations) { |
| 1580 | error = -EINVAL; |
| 1581 | goto out_put_tmp_file; |
| 1582 | } |
| 1583 | |
| 1584 | ip = XFS_I(file_inode(f.file)); |
| 1585 | tip = XFS_I(file_inode(tmp.file)); |
| 1586 | |
| 1587 | if (ip->i_mount != tip->i_mount) { |
| 1588 | error = -EINVAL; |
| 1589 | goto out_put_tmp_file; |
| 1590 | } |
| 1591 | |
| 1592 | if (ip->i_ino == tip->i_ino) { |
| 1593 | error = -EINVAL; |
| 1594 | goto out_put_tmp_file; |
| 1595 | } |
| 1596 | |
| 1597 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
| 1598 | error = -EIO; |
| 1599 | goto out_put_tmp_file; |
| 1600 | } |
| 1601 | |
| 1602 | error = xfs_swap_extents(ip, tip, sxp); |
| 1603 | |
| 1604 | out_put_tmp_file: |
| 1605 | fdput(tmp); |
| 1606 | out_put_file: |
| 1607 | fdput(f); |
| 1608 | out: |
| 1609 | return error; |
| 1610 | } |
| 1611 | |
| 1612 | /* |
| 1613 | * Note: some of the ioctl's return positive numbers as a |
| 1614 | * byte count indicating success, such as readlink_by_handle. |
| 1615 | * So we don't "sign flip" like most other routines. This means |
| 1616 | * true errors need to be returned as a negative value. |
| 1617 | */ |
| 1618 | long |
| 1619 | xfs_file_ioctl( |
| 1620 | struct file *filp, |
| 1621 | unsigned int cmd, |
| 1622 | unsigned long p) |
| 1623 | { |
| 1624 | struct inode *inode = file_inode(filp); |
| 1625 | struct xfs_inode *ip = XFS_I(inode); |
| 1626 | struct xfs_mount *mp = ip->i_mount; |
| 1627 | void __user *arg = (void __user *)p; |
| 1628 | int ioflags = 0; |
| 1629 | int error; |
| 1630 | |
| 1631 | if (filp->f_mode & FMODE_NOCMTIME) |
| 1632 | ioflags |= XFS_IO_INVIS; |
| 1633 | |
| 1634 | trace_xfs_file_ioctl(ip); |
| 1635 | |
| 1636 | switch (cmd) { |
| 1637 | case FITRIM: |
| 1638 | return xfs_ioc_trim(mp, arg); |
| 1639 | case XFS_IOC_ALLOCSP: |
| 1640 | case XFS_IOC_FREESP: |
| 1641 | case XFS_IOC_RESVSP: |
| 1642 | case XFS_IOC_UNRESVSP: |
| 1643 | case XFS_IOC_ALLOCSP64: |
| 1644 | case XFS_IOC_FREESP64: |
| 1645 | case XFS_IOC_RESVSP64: |
| 1646 | case XFS_IOC_UNRESVSP64: |
| 1647 | case XFS_IOC_ZERO_RANGE: { |
| 1648 | xfs_flock64_t bf; |
| 1649 | |
| 1650 | if (copy_from_user(&bf, arg, sizeof(bf))) |
| 1651 | return -EFAULT; |
| 1652 | return xfs_ioc_space(ip, inode, filp, ioflags, cmd, &bf); |
| 1653 | } |
| 1654 | case XFS_IOC_DIOINFO: { |
| 1655 | struct dioattr da; |
| 1656 | xfs_buftarg_t *target = |
| 1657 | XFS_IS_REALTIME_INODE(ip) ? |
| 1658 | mp->m_rtdev_targp : mp->m_ddev_targp; |
| 1659 | |
| 1660 | da.d_mem = da.d_miniosz = target->bt_logical_sectorsize; |
| 1661 | da.d_maxiosz = INT_MAX & ~(da.d_miniosz - 1); |
| 1662 | |
| 1663 | if (copy_to_user(arg, &da, sizeof(da))) |
| 1664 | return -EFAULT; |
| 1665 | return 0; |
| 1666 | } |
| 1667 | |
| 1668 | case XFS_IOC_FSBULKSTAT_SINGLE: |
| 1669 | case XFS_IOC_FSBULKSTAT: |
| 1670 | case XFS_IOC_FSINUMBERS: |
| 1671 | return xfs_ioc_bulkstat(mp, cmd, arg); |
| 1672 | |
| 1673 | case XFS_IOC_FSGEOMETRY_V1: |
| 1674 | return xfs_ioc_fsgeometry_v1(mp, arg); |
| 1675 | |
| 1676 | case XFS_IOC_FSGEOMETRY: |
| 1677 | return xfs_ioc_fsgeometry(mp, arg); |
| 1678 | |
| 1679 | case XFS_IOC_GETVERSION: |
| 1680 | return put_user(inode->i_generation, (int __user *)arg); |
| 1681 | |
| 1682 | case XFS_IOC_FSGETXATTR: |
| 1683 | return xfs_ioc_fsgetxattr(ip, 0, arg); |
| 1684 | case XFS_IOC_FSGETXATTRA: |
| 1685 | return xfs_ioc_fsgetxattr(ip, 1, arg); |
| 1686 | case XFS_IOC_FSSETXATTR: |
| 1687 | return xfs_ioc_fssetxattr(ip, filp, arg); |
| 1688 | case XFS_IOC_GETXFLAGS: |
| 1689 | return xfs_ioc_getxflags(ip, arg); |
| 1690 | case XFS_IOC_SETXFLAGS: |
| 1691 | return xfs_ioc_setxflags(ip, filp, arg); |
| 1692 | |
| 1693 | case XFS_IOC_FSSETDM: { |
| 1694 | struct fsdmidata dmi; |
| 1695 | |
| 1696 | if (copy_from_user(&dmi, arg, sizeof(dmi))) |
| 1697 | return -EFAULT; |
| 1698 | |
| 1699 | error = mnt_want_write_file(filp); |
| 1700 | if (error) |
| 1701 | return error; |
| 1702 | |
| 1703 | error = xfs_set_dmattrs(ip, dmi.fsd_dmevmask, |
| 1704 | dmi.fsd_dmstate); |
| 1705 | mnt_drop_write_file(filp); |
| 1706 | return error; |
| 1707 | } |
| 1708 | |
| 1709 | case XFS_IOC_GETBMAP: |
| 1710 | case XFS_IOC_GETBMAPA: |
| 1711 | return xfs_ioc_getbmap(ip, ioflags, cmd, arg); |
| 1712 | |
| 1713 | case XFS_IOC_GETBMAPX: |
| 1714 | return xfs_ioc_getbmapx(ip, arg); |
| 1715 | |
| 1716 | case XFS_IOC_FD_TO_HANDLE: |
| 1717 | case XFS_IOC_PATH_TO_HANDLE: |
| 1718 | case XFS_IOC_PATH_TO_FSHANDLE: { |
| 1719 | xfs_fsop_handlereq_t hreq; |
| 1720 | |
| 1721 | if (copy_from_user(&hreq, arg, sizeof(hreq))) |
| 1722 | return -EFAULT; |
| 1723 | return xfs_find_handle(cmd, &hreq); |
| 1724 | } |
| 1725 | case XFS_IOC_OPEN_BY_HANDLE: { |
| 1726 | xfs_fsop_handlereq_t hreq; |
| 1727 | |
| 1728 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 1729 | return -EFAULT; |
| 1730 | return xfs_open_by_handle(filp, &hreq); |
| 1731 | } |
| 1732 | case XFS_IOC_FSSETDM_BY_HANDLE: |
| 1733 | return xfs_fssetdm_by_handle(filp, arg); |
| 1734 | |
| 1735 | case XFS_IOC_READLINK_BY_HANDLE: { |
| 1736 | xfs_fsop_handlereq_t hreq; |
| 1737 | |
| 1738 | if (copy_from_user(&hreq, arg, sizeof(xfs_fsop_handlereq_t))) |
| 1739 | return -EFAULT; |
| 1740 | return xfs_readlink_by_handle(filp, &hreq); |
| 1741 | } |
| 1742 | case XFS_IOC_ATTRLIST_BY_HANDLE: |
| 1743 | return xfs_attrlist_by_handle(filp, arg); |
| 1744 | |
| 1745 | case XFS_IOC_ATTRMULTI_BY_HANDLE: |
| 1746 | return xfs_attrmulti_by_handle(filp, arg); |
| 1747 | |
| 1748 | case XFS_IOC_SWAPEXT: { |
| 1749 | struct xfs_swapext sxp; |
| 1750 | |
| 1751 | if (copy_from_user(&sxp, arg, sizeof(xfs_swapext_t))) |
| 1752 | return -EFAULT; |
| 1753 | error = mnt_want_write_file(filp); |
| 1754 | if (error) |
| 1755 | return error; |
| 1756 | error = xfs_ioc_swapext(&sxp); |
| 1757 | mnt_drop_write_file(filp); |
| 1758 | return error; |
| 1759 | } |
| 1760 | |
| 1761 | case XFS_IOC_FSCOUNTS: { |
| 1762 | xfs_fsop_counts_t out; |
| 1763 | |
| 1764 | error = xfs_fs_counts(mp, &out); |
| 1765 | if (error) |
| 1766 | return error; |
| 1767 | |
| 1768 | if (copy_to_user(arg, &out, sizeof(out))) |
| 1769 | return -EFAULT; |
| 1770 | return 0; |
| 1771 | } |
| 1772 | |
| 1773 | case XFS_IOC_SET_RESBLKS: { |
| 1774 | xfs_fsop_resblks_t inout; |
| 1775 | __uint64_t in; |
| 1776 | |
| 1777 | if (!capable(CAP_SYS_ADMIN)) |
| 1778 | return -EPERM; |
| 1779 | |
| 1780 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 1781 | return -EROFS; |
| 1782 | |
| 1783 | if (copy_from_user(&inout, arg, sizeof(inout))) |
| 1784 | return -EFAULT; |
| 1785 | |
| 1786 | error = mnt_want_write_file(filp); |
| 1787 | if (error) |
| 1788 | return error; |
| 1789 | |
| 1790 | /* input parameter is passed in resblks field of structure */ |
| 1791 | in = inout.resblks; |
| 1792 | error = xfs_reserve_blocks(mp, &in, &inout); |
| 1793 | mnt_drop_write_file(filp); |
| 1794 | if (error) |
| 1795 | return error; |
| 1796 | |
| 1797 | if (copy_to_user(arg, &inout, sizeof(inout))) |
| 1798 | return -EFAULT; |
| 1799 | return 0; |
| 1800 | } |
| 1801 | |
| 1802 | case XFS_IOC_GET_RESBLKS: { |
| 1803 | xfs_fsop_resblks_t out; |
| 1804 | |
| 1805 | if (!capable(CAP_SYS_ADMIN)) |
| 1806 | return -EPERM; |
| 1807 | |
| 1808 | error = xfs_reserve_blocks(mp, NULL, &out); |
| 1809 | if (error) |
| 1810 | return error; |
| 1811 | |
| 1812 | if (copy_to_user(arg, &out, sizeof(out))) |
| 1813 | return -EFAULT; |
| 1814 | |
| 1815 | return 0; |
| 1816 | } |
| 1817 | |
| 1818 | case XFS_IOC_FSGROWFSDATA: { |
| 1819 | xfs_growfs_data_t in; |
| 1820 | |
| 1821 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1822 | return -EFAULT; |
| 1823 | |
| 1824 | error = mnt_want_write_file(filp); |
| 1825 | if (error) |
| 1826 | return error; |
| 1827 | error = xfs_growfs_data(mp, &in); |
| 1828 | mnt_drop_write_file(filp); |
| 1829 | return error; |
| 1830 | } |
| 1831 | |
| 1832 | case XFS_IOC_FSGROWFSLOG: { |
| 1833 | xfs_growfs_log_t in; |
| 1834 | |
| 1835 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1836 | return -EFAULT; |
| 1837 | |
| 1838 | error = mnt_want_write_file(filp); |
| 1839 | if (error) |
| 1840 | return error; |
| 1841 | error = xfs_growfs_log(mp, &in); |
| 1842 | mnt_drop_write_file(filp); |
| 1843 | return error; |
| 1844 | } |
| 1845 | |
| 1846 | case XFS_IOC_FSGROWFSRT: { |
| 1847 | xfs_growfs_rt_t in; |
| 1848 | |
| 1849 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1850 | return -EFAULT; |
| 1851 | |
| 1852 | error = mnt_want_write_file(filp); |
| 1853 | if (error) |
| 1854 | return error; |
| 1855 | error = xfs_growfs_rt(mp, &in); |
| 1856 | mnt_drop_write_file(filp); |
| 1857 | return error; |
| 1858 | } |
| 1859 | |
| 1860 | case XFS_IOC_GOINGDOWN: { |
| 1861 | __uint32_t in; |
| 1862 | |
| 1863 | if (!capable(CAP_SYS_ADMIN)) |
| 1864 | return -EPERM; |
| 1865 | |
| 1866 | if (get_user(in, (__uint32_t __user *)arg)) |
| 1867 | return -EFAULT; |
| 1868 | |
| 1869 | return xfs_fs_goingdown(mp, in); |
| 1870 | } |
| 1871 | |
| 1872 | case XFS_IOC_ERROR_INJECTION: { |
| 1873 | xfs_error_injection_t in; |
| 1874 | |
| 1875 | if (!capable(CAP_SYS_ADMIN)) |
| 1876 | return -EPERM; |
| 1877 | |
| 1878 | if (copy_from_user(&in, arg, sizeof(in))) |
| 1879 | return -EFAULT; |
| 1880 | |
| 1881 | return xfs_errortag_add(in.errtag, mp); |
| 1882 | } |
| 1883 | |
| 1884 | case XFS_IOC_ERROR_CLEARALL: |
| 1885 | if (!capable(CAP_SYS_ADMIN)) |
| 1886 | return -EPERM; |
| 1887 | |
| 1888 | return xfs_errortag_clearall(mp, 1); |
| 1889 | |
| 1890 | case XFS_IOC_FREE_EOFBLOCKS: { |
| 1891 | struct xfs_fs_eofblocks eofb; |
| 1892 | struct xfs_eofblocks keofb; |
| 1893 | |
| 1894 | if (!capable(CAP_SYS_ADMIN)) |
| 1895 | return -EPERM; |
| 1896 | |
| 1897 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 1898 | return -EROFS; |
| 1899 | |
| 1900 | if (copy_from_user(&eofb, arg, sizeof(eofb))) |
| 1901 | return -EFAULT; |
| 1902 | |
| 1903 | error = xfs_fs_eofblocks_from_user(&eofb, &keofb); |
| 1904 | if (error) |
| 1905 | return error; |
| 1906 | |
| 1907 | return xfs_icache_free_eofblocks(mp, &keofb); |
| 1908 | } |
| 1909 | |
| 1910 | default: |
| 1911 | return -ENOTTY; |
| 1912 | } |
| 1913 | } |