1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (c) 2004-2005 Silicon Graphics, Inc. 4 * All Rights Reserved. 5 */ 6 #include <linux/mount.h> 7 #include <linux/fsmap.h> 8 #include "xfs.h" 9 #include "xfs_fs.h" 10 #include "xfs_shared.h" 11 #include "xfs_format.h" 12 #include "xfs_log_format.h" 13 #include "xfs_trans_resv.h" 14 #include "xfs_mount.h" 15 #include "xfs_inode.h" 16 #include "xfs_iwalk.h" 17 #include "xfs_itable.h" 18 #include "xfs_fsops.h" 19 #include "xfs_rtalloc.h" 20 #include "xfs_attr.h" 21 #include "xfs_ioctl.h" 22 #include "xfs_ioctl32.h" 23 #include "xfs_trace.h" 24 #include "xfs_sb.h" 25 26 #define _NATIVE_IOC(cmd, type) \ 27 _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type)) 28 29 #ifdef BROKEN_X86_ALIGNMENT 30 STATIC int 31 xfs_compat_flock64_copyin( 32 xfs_flock64_t *bf, 33 compat_xfs_flock64_t __user *arg32) 34 { 35 if (get_user(bf->l_type, &arg32->l_type) || 36 get_user(bf->l_whence, &arg32->l_whence) || 37 get_user(bf->l_start, &arg32->l_start) || 38 get_user(bf->l_len, &arg32->l_len) || 39 get_user(bf->l_sysid, &arg32->l_sysid) || 40 get_user(bf->l_pid, &arg32->l_pid) || 41 copy_from_user(bf->l_pad, &arg32->l_pad, 4*sizeof(u32))) 42 return -EFAULT; 43 return 0; 44 } 45 46 STATIC int 47 xfs_compat_ioc_fsgeometry_v1( 48 struct xfs_mount *mp, 49 compat_xfs_fsop_geom_v1_t __user *arg32) 50 { 51 struct xfs_fsop_geom fsgeo; 52 53 xfs_fs_geometry(&mp->m_sb, &fsgeo, 3); 54 /* The 32-bit variant simply has some padding at the end */ 55 if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1))) 56 return -EFAULT; 57 return 0; 58 } 59 60 STATIC int 61 xfs_compat_growfs_data_copyin( 62 struct xfs_growfs_data *in, 63 compat_xfs_growfs_data_t __user *arg32) 64 { 65 if (get_user(in->newblocks, &arg32->newblocks) || 66 get_user(in->imaxpct, &arg32->imaxpct)) 67 return -EFAULT; 68 return 0; 69 } 70 71 STATIC int 72 xfs_compat_growfs_rt_copyin( 73 struct xfs_growfs_rt *in, 74 compat_xfs_growfs_rt_t __user *arg32) 75 { 76 if (get_user(in->newblocks, &arg32->newblocks) || 77 get_user(in->extsize, &arg32->extsize)) 78 return -EFAULT; 79 return 0; 80 } 81 82 STATIC int 83 xfs_fsinumbers_fmt_compat( 84 struct xfs_ibulk *breq, 85 const struct xfs_inumbers *ig) 86 { 87 struct compat_xfs_inogrp __user *p32 = breq->ubuffer; 88 struct xfs_inogrp ig1; 89 struct xfs_inogrp *igrp = &ig1; 90 91 xfs_inumbers_to_inogrp(&ig1, ig); 92 93 if (put_user(igrp->xi_startino, &p32->xi_startino) || 94 put_user(igrp->xi_alloccount, &p32->xi_alloccount) || 95 put_user(igrp->xi_allocmask, &p32->xi_allocmask)) 96 return -EFAULT; 97 98 return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_inogrp)); 99 } 100 101 #else 102 #define xfs_fsinumbers_fmt_compat xfs_fsinumbers_fmt 103 #endif /* BROKEN_X86_ALIGNMENT */ 104 105 STATIC int 106 xfs_ioctl32_bstime_copyin( 107 xfs_bstime_t *bstime, 108 compat_xfs_bstime_t __user *bstime32) 109 { 110 old_time32_t sec32; /* tv_sec differs on 64 vs. 32 */ 111 112 if (get_user(sec32, &bstime32->tv_sec) || 113 get_user(bstime->tv_nsec, &bstime32->tv_nsec)) 114 return -EFAULT; 115 bstime->tv_sec = sec32; 116 return 0; 117 } 118 119 /* 120 * struct xfs_bstat has differing alignment on intel, & bstime_t sizes 121 * everywhere 122 */ 123 STATIC int 124 xfs_ioctl32_bstat_copyin( 125 struct xfs_bstat *bstat, 126 struct compat_xfs_bstat __user *bstat32) 127 { 128 if (get_user(bstat->bs_ino, &bstat32->bs_ino) || 129 get_user(bstat->bs_mode, &bstat32->bs_mode) || 130 get_user(bstat->bs_nlink, &bstat32->bs_nlink) || 131 get_user(bstat->bs_uid, &bstat32->bs_uid) || 132 get_user(bstat->bs_gid, &bstat32->bs_gid) || 133 get_user(bstat->bs_rdev, &bstat32->bs_rdev) || 134 get_user(bstat->bs_blksize, &bstat32->bs_blksize) || 135 get_user(bstat->bs_size, &bstat32->bs_size) || 136 xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) || 137 xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) || 138 xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) || 139 get_user(bstat->bs_blocks, &bstat32->bs_size) || 140 get_user(bstat->bs_xflags, &bstat32->bs_size) || 141 get_user(bstat->bs_extsize, &bstat32->bs_extsize) || 142 get_user(bstat->bs_extents, &bstat32->bs_extents) || 143 get_user(bstat->bs_gen, &bstat32->bs_gen) || 144 get_user(bstat->bs_projid_lo, &bstat32->bs_projid_lo) || 145 get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) || 146 get_user(bstat->bs_forkoff, &bstat32->bs_forkoff) || 147 get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) || 148 get_user(bstat->bs_dmstate, &bstat32->bs_dmstate) || 149 get_user(bstat->bs_aextents, &bstat32->bs_aextents)) 150 return -EFAULT; 151 return 0; 152 } 153 154 /* XFS_IOC_FSBULKSTAT and friends */ 155 156 STATIC int 157 xfs_bstime_store_compat( 158 compat_xfs_bstime_t __user *p32, 159 const xfs_bstime_t *p) 160 { 161 __s32 sec32; 162 163 sec32 = p->tv_sec; 164 if (put_user(sec32, &p32->tv_sec) || 165 put_user(p->tv_nsec, &p32->tv_nsec)) 166 return -EFAULT; 167 return 0; 168 } 169 170 /* Return 0 on success or positive error (to xfs_bulkstat()) */ 171 STATIC int 172 xfs_fsbulkstat_one_fmt_compat( 173 struct xfs_ibulk *breq, 174 const struct xfs_bulkstat *bstat) 175 { 176 struct compat_xfs_bstat __user *p32 = breq->ubuffer; 177 struct xfs_bstat bs1; 178 struct xfs_bstat *buffer = &bs1; 179 180 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 181 182 if (put_user(buffer->bs_ino, &p32->bs_ino) || 183 put_user(buffer->bs_mode, &p32->bs_mode) || 184 put_user(buffer->bs_nlink, &p32->bs_nlink) || 185 put_user(buffer->bs_uid, &p32->bs_uid) || 186 put_user(buffer->bs_gid, &p32->bs_gid) || 187 put_user(buffer->bs_rdev, &p32->bs_rdev) || 188 put_user(buffer->bs_blksize, &p32->bs_blksize) || 189 put_user(buffer->bs_size, &p32->bs_size) || 190 xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) || 191 xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) || 192 xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) || 193 put_user(buffer->bs_blocks, &p32->bs_blocks) || 194 put_user(buffer->bs_xflags, &p32->bs_xflags) || 195 put_user(buffer->bs_extsize, &p32->bs_extsize) || 196 put_user(buffer->bs_extents, &p32->bs_extents) || 197 put_user(buffer->bs_gen, &p32->bs_gen) || 198 put_user(buffer->bs_projid, &p32->bs_projid) || 199 put_user(buffer->bs_projid_hi, &p32->bs_projid_hi) || 200 put_user(buffer->bs_forkoff, &p32->bs_forkoff) || 201 put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) || 202 put_user(buffer->bs_dmstate, &p32->bs_dmstate) || 203 put_user(buffer->bs_aextents, &p32->bs_aextents)) 204 return -EFAULT; 205 206 return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_bstat)); 207 } 208 209 /* copied from xfs_ioctl.c */ 210 STATIC int 211 xfs_compat_ioc_fsbulkstat( 212 struct file *file, 213 unsigned int cmd, 214 struct compat_xfs_fsop_bulkreq __user *p32) 215 { 216 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 217 u32 addr; 218 struct xfs_fsop_bulkreq bulkreq; 219 struct xfs_ibulk breq = { 220 .mp = mp, 221 .mnt_userns = file_mnt_user_ns(file), 222 .ocount = 0, 223 }; 224 xfs_ino_t lastino; 225 int error; 226 227 /* 228 * Output structure handling functions. Depending on the command, 229 * either the xfs_bstat and xfs_inogrp structures are written out 230 * to userpace memory via bulkreq.ubuffer. Normally the compat 231 * functions and structure size are the correct ones to use ... 232 */ 233 inumbers_fmt_pf inumbers_func = xfs_fsinumbers_fmt_compat; 234 bulkstat_one_fmt_pf bs_one_func = xfs_fsbulkstat_one_fmt_compat; 235 236 #ifdef CONFIG_X86_X32 237 if (in_x32_syscall()) { 238 /* 239 * ... but on x32 the input xfs_fsop_bulkreq has pointers 240 * which must be handled in the "compat" (32-bit) way, while 241 * the xfs_bstat and xfs_inogrp structures follow native 64- 242 * bit layout convention. So adjust accordingly, otherwise 243 * the data written out in compat layout will not match what 244 * x32 userspace expects. 245 */ 246 inumbers_func = xfs_fsinumbers_fmt; 247 bs_one_func = xfs_fsbulkstat_one_fmt; 248 } 249 #endif 250 251 /* done = 1 if there are more stats to get and if bulkstat */ 252 /* should be called again (unused here, but used in dmapi) */ 253 254 if (!capable(CAP_SYS_ADMIN)) 255 return -EPERM; 256 257 if (XFS_FORCED_SHUTDOWN(mp)) 258 return -EIO; 259 260 if (get_user(addr, &p32->lastip)) 261 return -EFAULT; 262 bulkreq.lastip = compat_ptr(addr); 263 if (get_user(bulkreq.icount, &p32->icount) || 264 get_user(addr, &p32->ubuffer)) 265 return -EFAULT; 266 bulkreq.ubuffer = compat_ptr(addr); 267 if (get_user(addr, &p32->ocount)) 268 return -EFAULT; 269 bulkreq.ocount = compat_ptr(addr); 270 271 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 272 return -EFAULT; 273 274 if (bulkreq.icount <= 0) 275 return -EINVAL; 276 277 if (bulkreq.ubuffer == NULL) 278 return -EINVAL; 279 280 breq.ubuffer = bulkreq.ubuffer; 281 breq.icount = bulkreq.icount; 282 283 /* 284 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 285 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 286 * that *lastip contains either zero or the number of the last inode to 287 * be examined by the previous call and return results starting with 288 * the next inode after that. The new bulk request back end functions 289 * take the inode to start with, so we have to compute the startino 290 * parameter from lastino to maintain correct function. lastino == 0 291 * is a special case because it has traditionally meant "first inode 292 * in filesystem". 293 */ 294 if (cmd == XFS_IOC_FSINUMBERS_32) { 295 breq.startino = lastino ? lastino + 1 : 0; 296 error = xfs_inumbers(&breq, inumbers_func); 297 lastino = breq.startino - 1; 298 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) { 299 breq.startino = lastino; 300 breq.icount = 1; 301 error = xfs_bulkstat_one(&breq, bs_one_func); 302 lastino = breq.startino; 303 } else if (cmd == XFS_IOC_FSBULKSTAT_32) { 304 breq.startino = lastino ? lastino + 1 : 0; 305 error = xfs_bulkstat(&breq, bs_one_func); 306 lastino = breq.startino - 1; 307 } else { 308 error = -EINVAL; 309 } 310 if (error) 311 return error; 312 313 if (bulkreq.lastip != NULL && 314 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 315 return -EFAULT; 316 317 if (bulkreq.ocount != NULL && 318 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 319 return -EFAULT; 320 321 return 0; 322 } 323 324 STATIC int 325 xfs_compat_handlereq_copyin( 326 xfs_fsop_handlereq_t *hreq, 327 compat_xfs_fsop_handlereq_t __user *arg32) 328 { 329 compat_xfs_fsop_handlereq_t hreq32; 330 331 if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t))) 332 return -EFAULT; 333 334 hreq->fd = hreq32.fd; 335 hreq->path = compat_ptr(hreq32.path); 336 hreq->oflags = hreq32.oflags; 337 hreq->ihandle = compat_ptr(hreq32.ihandle); 338 hreq->ihandlen = hreq32.ihandlen; 339 hreq->ohandle = compat_ptr(hreq32.ohandle); 340 hreq->ohandlen = compat_ptr(hreq32.ohandlen); 341 342 return 0; 343 } 344 345 STATIC struct dentry * 346 xfs_compat_handlereq_to_dentry( 347 struct file *parfilp, 348 compat_xfs_fsop_handlereq_t *hreq) 349 { 350 return xfs_handle_to_dentry(parfilp, 351 compat_ptr(hreq->ihandle), hreq->ihandlen); 352 } 353 354 STATIC int 355 xfs_compat_attrlist_by_handle( 356 struct file *parfilp, 357 compat_xfs_fsop_attrlist_handlereq_t __user *p) 358 { 359 compat_xfs_fsop_attrlist_handlereq_t al_hreq; 360 struct dentry *dentry; 361 int error; 362 363 if (!capable(CAP_SYS_ADMIN)) 364 return -EPERM; 365 if (copy_from_user(&al_hreq, p, sizeof(al_hreq))) 366 return -EFAULT; 367 368 dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq); 369 if (IS_ERR(dentry)) 370 return PTR_ERR(dentry); 371 372 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), 373 compat_ptr(al_hreq.buffer), al_hreq.buflen, 374 al_hreq.flags, &p->pos); 375 dput(dentry); 376 return error; 377 } 378 379 STATIC int 380 xfs_compat_attrmulti_by_handle( 381 struct file *parfilp, 382 void __user *arg) 383 { 384 int error; 385 compat_xfs_attr_multiop_t *ops; 386 compat_xfs_fsop_attrmulti_handlereq_t am_hreq; 387 struct dentry *dentry; 388 unsigned int i, size; 389 390 if (!capable(CAP_SYS_ADMIN)) 391 return -EPERM; 392 if (copy_from_user(&am_hreq, arg, 393 sizeof(compat_xfs_fsop_attrmulti_handlereq_t))) 394 return -EFAULT; 395 396 /* overflow check */ 397 if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t)) 398 return -E2BIG; 399 400 dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq); 401 if (IS_ERR(dentry)) 402 return PTR_ERR(dentry); 403 404 error = -E2BIG; 405 size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t); 406 if (!size || size > 16 * PAGE_SIZE) 407 goto out_dput; 408 409 ops = memdup_user(compat_ptr(am_hreq.ops), size); 410 if (IS_ERR(ops)) { 411 error = PTR_ERR(ops); 412 goto out_dput; 413 } 414 415 error = 0; 416 for (i = 0; i < am_hreq.opcount; i++) { 417 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp, 418 d_inode(dentry), ops[i].am_opcode, 419 compat_ptr(ops[i].am_attrname), 420 compat_ptr(ops[i].am_attrvalue), 421 &ops[i].am_length, ops[i].am_flags); 422 } 423 424 if (copy_to_user(compat_ptr(am_hreq.ops), ops, size)) 425 error = -EFAULT; 426 427 kfree(ops); 428 out_dput: 429 dput(dentry); 430 return error; 431 } 432 433 long 434 xfs_file_compat_ioctl( 435 struct file *filp, 436 unsigned cmd, 437 unsigned long p) 438 { 439 struct inode *inode = file_inode(filp); 440 struct xfs_inode *ip = XFS_I(inode); 441 void __user *arg = compat_ptr(p); 442 int error; 443 444 trace_xfs_file_compat_ioctl(ip); 445 446 switch (cmd) { 447 #if defined(BROKEN_X86_ALIGNMENT) 448 case XFS_IOC_ALLOCSP_32: 449 case XFS_IOC_FREESP_32: 450 case XFS_IOC_ALLOCSP64_32: 451 case XFS_IOC_FREESP64_32: { 452 struct xfs_flock64 bf; 453 454 if (xfs_compat_flock64_copyin(&bf, arg)) 455 return -EFAULT; 456 cmd = _NATIVE_IOC(cmd, struct xfs_flock64); 457 return xfs_ioc_space(filp, &bf); 458 } 459 case XFS_IOC_FSGEOMETRY_V1_32: 460 return xfs_compat_ioc_fsgeometry_v1(ip->i_mount, arg); 461 case XFS_IOC_FSGROWFSDATA_32: { 462 struct xfs_growfs_data in; 463 464 if (xfs_compat_growfs_data_copyin(&in, arg)) 465 return -EFAULT; 466 error = mnt_want_write_file(filp); 467 if (error) 468 return error; 469 error = xfs_growfs_data(ip->i_mount, &in); 470 mnt_drop_write_file(filp); 471 return error; 472 } 473 case XFS_IOC_FSGROWFSRT_32: { 474 struct xfs_growfs_rt in; 475 476 if (xfs_compat_growfs_rt_copyin(&in, arg)) 477 return -EFAULT; 478 error = mnt_want_write_file(filp); 479 if (error) 480 return error; 481 error = xfs_growfs_rt(ip->i_mount, &in); 482 mnt_drop_write_file(filp); 483 return error; 484 } 485 #endif 486 /* long changes size, but xfs only copiese out 32 bits */ 487 case XFS_IOC_GETVERSION_32: 488 cmd = _NATIVE_IOC(cmd, long); 489 return xfs_file_ioctl(filp, cmd, p); 490 case XFS_IOC_SWAPEXT_32: { 491 struct xfs_swapext sxp; 492 struct compat_xfs_swapext __user *sxu = arg; 493 494 /* Bulk copy in up to the sx_stat field, then copy bstat */ 495 if (copy_from_user(&sxp, sxu, 496 offsetof(struct xfs_swapext, sx_stat)) || 497 xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat)) 498 return -EFAULT; 499 error = mnt_want_write_file(filp); 500 if (error) 501 return error; 502 error = xfs_ioc_swapext(&sxp); 503 mnt_drop_write_file(filp); 504 return error; 505 } 506 case XFS_IOC_FSBULKSTAT_32: 507 case XFS_IOC_FSBULKSTAT_SINGLE_32: 508 case XFS_IOC_FSINUMBERS_32: 509 return xfs_compat_ioc_fsbulkstat(filp, cmd, arg); 510 case XFS_IOC_FD_TO_HANDLE_32: 511 case XFS_IOC_PATH_TO_HANDLE_32: 512 case XFS_IOC_PATH_TO_FSHANDLE_32: { 513 struct xfs_fsop_handlereq hreq; 514 515 if (xfs_compat_handlereq_copyin(&hreq, arg)) 516 return -EFAULT; 517 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq); 518 return xfs_find_handle(cmd, &hreq); 519 } 520 case XFS_IOC_OPEN_BY_HANDLE_32: { 521 struct xfs_fsop_handlereq hreq; 522 523 if (xfs_compat_handlereq_copyin(&hreq, arg)) 524 return -EFAULT; 525 return xfs_open_by_handle(filp, &hreq); 526 } 527 case XFS_IOC_READLINK_BY_HANDLE_32: { 528 struct xfs_fsop_handlereq hreq; 529 530 if (xfs_compat_handlereq_copyin(&hreq, arg)) 531 return -EFAULT; 532 return xfs_readlink_by_handle(filp, &hreq); 533 } 534 case XFS_IOC_ATTRLIST_BY_HANDLE_32: 535 return xfs_compat_attrlist_by_handle(filp, arg); 536 case XFS_IOC_ATTRMULTI_BY_HANDLE_32: 537 return xfs_compat_attrmulti_by_handle(filp, arg); 538 default: 539 /* try the native version */ 540 return xfs_file_ioctl(filp, cmd, (unsigned long)arg); 541 } 542 } 543