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_da_format.h" 21 #include "xfs_da_btree.h" 22 #include "xfs_attr.h" 23 #include "xfs_ioctl.h" 24 #include "xfs_ioctl32.h" 25 #include "xfs_trace.h" 26 #include "xfs_sb.h" 27 28 #define _NATIVE_IOC(cmd, type) \ 29 _IOC(_IOC_DIR(cmd), _IOC_TYPE(cmd), _IOC_NR(cmd), sizeof(type)) 30 31 #ifdef BROKEN_X86_ALIGNMENT 32 STATIC int 33 xfs_compat_ioc_fsgeometry_v1( 34 struct xfs_mount *mp, 35 compat_xfs_fsop_geom_v1_t __user *arg32) 36 { 37 struct xfs_fsop_geom fsgeo; 38 39 xfs_fs_geometry(mp, &fsgeo, 3); 40 /* The 32-bit variant simply has some padding at the end */ 41 if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1))) 42 return -EFAULT; 43 return 0; 44 } 45 46 STATIC int 47 xfs_compat_growfs_data_copyin( 48 struct xfs_growfs_data *in, 49 compat_xfs_growfs_data_t __user *arg32) 50 { 51 if (get_user(in->newblocks, &arg32->newblocks) || 52 get_user(in->imaxpct, &arg32->imaxpct)) 53 return -EFAULT; 54 return 0; 55 } 56 57 STATIC int 58 xfs_compat_growfs_rt_copyin( 59 struct xfs_growfs_rt *in, 60 compat_xfs_growfs_rt_t __user *arg32) 61 { 62 if (get_user(in->newblocks, &arg32->newblocks) || 63 get_user(in->extsize, &arg32->extsize)) 64 return -EFAULT; 65 return 0; 66 } 67 68 STATIC int 69 xfs_fsinumbers_fmt_compat( 70 struct xfs_ibulk *breq, 71 const struct xfs_inumbers *ig) 72 { 73 struct compat_xfs_inogrp __user *p32 = breq->ubuffer; 74 struct xfs_inogrp ig1; 75 struct xfs_inogrp *igrp = &ig1; 76 77 xfs_inumbers_to_inogrp(&ig1, ig); 78 79 if (put_user(igrp->xi_startino, &p32->xi_startino) || 80 put_user(igrp->xi_alloccount, &p32->xi_alloccount) || 81 put_user(igrp->xi_allocmask, &p32->xi_allocmask)) 82 return -EFAULT; 83 84 return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_inogrp)); 85 } 86 87 #else 88 #define xfs_fsinumbers_fmt_compat xfs_fsinumbers_fmt 89 #endif /* BROKEN_X86_ALIGNMENT */ 90 91 STATIC int 92 xfs_ioctl32_bstime_copyin( 93 xfs_bstime_t *bstime, 94 compat_xfs_bstime_t __user *bstime32) 95 { 96 old_time32_t sec32; /* tv_sec differs on 64 vs. 32 */ 97 98 if (get_user(sec32, &bstime32->tv_sec) || 99 get_user(bstime->tv_nsec, &bstime32->tv_nsec)) 100 return -EFAULT; 101 bstime->tv_sec = sec32; 102 return 0; 103 } 104 105 /* 106 * struct xfs_bstat has differing alignment on intel, & bstime_t sizes 107 * everywhere 108 */ 109 STATIC int 110 xfs_ioctl32_bstat_copyin( 111 struct xfs_bstat *bstat, 112 struct compat_xfs_bstat __user *bstat32) 113 { 114 if (get_user(bstat->bs_ino, &bstat32->bs_ino) || 115 get_user(bstat->bs_mode, &bstat32->bs_mode) || 116 get_user(bstat->bs_nlink, &bstat32->bs_nlink) || 117 get_user(bstat->bs_uid, &bstat32->bs_uid) || 118 get_user(bstat->bs_gid, &bstat32->bs_gid) || 119 get_user(bstat->bs_rdev, &bstat32->bs_rdev) || 120 get_user(bstat->bs_blksize, &bstat32->bs_blksize) || 121 get_user(bstat->bs_size, &bstat32->bs_size) || 122 xfs_ioctl32_bstime_copyin(&bstat->bs_atime, &bstat32->bs_atime) || 123 xfs_ioctl32_bstime_copyin(&bstat->bs_mtime, &bstat32->bs_mtime) || 124 xfs_ioctl32_bstime_copyin(&bstat->bs_ctime, &bstat32->bs_ctime) || 125 get_user(bstat->bs_blocks, &bstat32->bs_size) || 126 get_user(bstat->bs_xflags, &bstat32->bs_size) || 127 get_user(bstat->bs_extsize, &bstat32->bs_extsize) || 128 get_user(bstat->bs_extents, &bstat32->bs_extents) || 129 get_user(bstat->bs_gen, &bstat32->bs_gen) || 130 get_user(bstat->bs_projid_lo, &bstat32->bs_projid_lo) || 131 get_user(bstat->bs_projid_hi, &bstat32->bs_projid_hi) || 132 get_user(bstat->bs_forkoff, &bstat32->bs_forkoff) || 133 get_user(bstat->bs_dmevmask, &bstat32->bs_dmevmask) || 134 get_user(bstat->bs_dmstate, &bstat32->bs_dmstate) || 135 get_user(bstat->bs_aextents, &bstat32->bs_aextents)) 136 return -EFAULT; 137 return 0; 138 } 139 140 /* XFS_IOC_FSBULKSTAT and friends */ 141 142 STATIC int 143 xfs_bstime_store_compat( 144 compat_xfs_bstime_t __user *p32, 145 const xfs_bstime_t *p) 146 { 147 __s32 sec32; 148 149 sec32 = p->tv_sec; 150 if (put_user(sec32, &p32->tv_sec) || 151 put_user(p->tv_nsec, &p32->tv_nsec)) 152 return -EFAULT; 153 return 0; 154 } 155 156 /* Return 0 on success or positive error (to xfs_bulkstat()) */ 157 STATIC int 158 xfs_fsbulkstat_one_fmt_compat( 159 struct xfs_ibulk *breq, 160 const struct xfs_bulkstat *bstat) 161 { 162 struct compat_xfs_bstat __user *p32 = breq->ubuffer; 163 struct xfs_bstat bs1; 164 struct xfs_bstat *buffer = &bs1; 165 166 xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat); 167 168 if (put_user(buffer->bs_ino, &p32->bs_ino) || 169 put_user(buffer->bs_mode, &p32->bs_mode) || 170 put_user(buffer->bs_nlink, &p32->bs_nlink) || 171 put_user(buffer->bs_uid, &p32->bs_uid) || 172 put_user(buffer->bs_gid, &p32->bs_gid) || 173 put_user(buffer->bs_rdev, &p32->bs_rdev) || 174 put_user(buffer->bs_blksize, &p32->bs_blksize) || 175 put_user(buffer->bs_size, &p32->bs_size) || 176 xfs_bstime_store_compat(&p32->bs_atime, &buffer->bs_atime) || 177 xfs_bstime_store_compat(&p32->bs_mtime, &buffer->bs_mtime) || 178 xfs_bstime_store_compat(&p32->bs_ctime, &buffer->bs_ctime) || 179 put_user(buffer->bs_blocks, &p32->bs_blocks) || 180 put_user(buffer->bs_xflags, &p32->bs_xflags) || 181 put_user(buffer->bs_extsize, &p32->bs_extsize) || 182 put_user(buffer->bs_extents, &p32->bs_extents) || 183 put_user(buffer->bs_gen, &p32->bs_gen) || 184 put_user(buffer->bs_projid, &p32->bs_projid) || 185 put_user(buffer->bs_projid_hi, &p32->bs_projid_hi) || 186 put_user(buffer->bs_forkoff, &p32->bs_forkoff) || 187 put_user(buffer->bs_dmevmask, &p32->bs_dmevmask) || 188 put_user(buffer->bs_dmstate, &p32->bs_dmstate) || 189 put_user(buffer->bs_aextents, &p32->bs_aextents)) 190 return -EFAULT; 191 192 return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_bstat)); 193 } 194 195 /* copied from xfs_ioctl.c */ 196 STATIC int 197 xfs_compat_ioc_fsbulkstat( 198 struct file *file, 199 unsigned int cmd, 200 struct compat_xfs_fsop_bulkreq __user *p32) 201 { 202 struct xfs_mount *mp = XFS_I(file_inode(file))->i_mount; 203 u32 addr; 204 struct xfs_fsop_bulkreq bulkreq; 205 struct xfs_ibulk breq = { 206 .mp = mp, 207 .idmap = file_mnt_idmap(file), 208 .ocount = 0, 209 }; 210 xfs_ino_t lastino; 211 int error; 212 213 /* 214 * Output structure handling functions. Depending on the command, 215 * either the xfs_bstat and xfs_inogrp structures are written out 216 * to userpace memory via bulkreq.ubuffer. Normally the compat 217 * functions and structure size are the correct ones to use ... 218 */ 219 inumbers_fmt_pf inumbers_func = xfs_fsinumbers_fmt_compat; 220 bulkstat_one_fmt_pf bs_one_func = xfs_fsbulkstat_one_fmt_compat; 221 222 #ifdef CONFIG_X86_X32_ABI 223 if (in_x32_syscall()) { 224 /* 225 * ... but on x32 the input xfs_fsop_bulkreq has pointers 226 * which must be handled in the "compat" (32-bit) way, while 227 * the xfs_bstat and xfs_inogrp structures follow native 64- 228 * bit layout convention. So adjust accordingly, otherwise 229 * the data written out in compat layout will not match what 230 * x32 userspace expects. 231 */ 232 inumbers_func = xfs_fsinumbers_fmt; 233 bs_one_func = xfs_fsbulkstat_one_fmt; 234 } 235 #endif 236 237 /* done = 1 if there are more stats to get and if bulkstat */ 238 /* should be called again (unused here, but used in dmapi) */ 239 240 if (!capable(CAP_SYS_ADMIN)) 241 return -EPERM; 242 243 if (xfs_is_shutdown(mp)) 244 return -EIO; 245 246 if (get_user(addr, &p32->lastip)) 247 return -EFAULT; 248 bulkreq.lastip = compat_ptr(addr); 249 if (get_user(bulkreq.icount, &p32->icount) || 250 get_user(addr, &p32->ubuffer)) 251 return -EFAULT; 252 bulkreq.ubuffer = compat_ptr(addr); 253 if (get_user(addr, &p32->ocount)) 254 return -EFAULT; 255 bulkreq.ocount = compat_ptr(addr); 256 257 if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64))) 258 return -EFAULT; 259 260 if (bulkreq.icount <= 0) 261 return -EINVAL; 262 263 if (bulkreq.ubuffer == NULL) 264 return -EINVAL; 265 266 breq.ubuffer = bulkreq.ubuffer; 267 breq.icount = bulkreq.icount; 268 269 /* 270 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number 271 * that we want to stat. However, FSINUMBERS and FSBULKSTAT expect 272 * that *lastip contains either zero or the number of the last inode to 273 * be examined by the previous call and return results starting with 274 * the next inode after that. The new bulk request back end functions 275 * take the inode to start with, so we have to compute the startino 276 * parameter from lastino to maintain correct function. lastino == 0 277 * is a special case because it has traditionally meant "first inode 278 * in filesystem". 279 */ 280 if (cmd == XFS_IOC_FSINUMBERS_32) { 281 breq.startino = lastino ? lastino + 1 : 0; 282 error = xfs_inumbers(&breq, inumbers_func); 283 lastino = breq.startino - 1; 284 } else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) { 285 breq.startino = lastino; 286 breq.icount = 1; 287 error = xfs_bulkstat_one(&breq, bs_one_func); 288 lastino = breq.startino; 289 } else if (cmd == XFS_IOC_FSBULKSTAT_32) { 290 breq.startino = lastino ? lastino + 1 : 0; 291 error = xfs_bulkstat(&breq, bs_one_func); 292 lastino = breq.startino - 1; 293 } else { 294 error = -EINVAL; 295 } 296 if (error) 297 return error; 298 299 if (bulkreq.lastip != NULL && 300 copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t))) 301 return -EFAULT; 302 303 if (bulkreq.ocount != NULL && 304 copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32))) 305 return -EFAULT; 306 307 return 0; 308 } 309 310 STATIC int 311 xfs_compat_handlereq_copyin( 312 xfs_fsop_handlereq_t *hreq, 313 compat_xfs_fsop_handlereq_t __user *arg32) 314 { 315 compat_xfs_fsop_handlereq_t hreq32; 316 317 if (copy_from_user(&hreq32, arg32, sizeof(compat_xfs_fsop_handlereq_t))) 318 return -EFAULT; 319 320 hreq->fd = hreq32.fd; 321 hreq->path = compat_ptr(hreq32.path); 322 hreq->oflags = hreq32.oflags; 323 hreq->ihandle = compat_ptr(hreq32.ihandle); 324 hreq->ihandlen = hreq32.ihandlen; 325 hreq->ohandle = compat_ptr(hreq32.ohandle); 326 hreq->ohandlen = compat_ptr(hreq32.ohandlen); 327 328 return 0; 329 } 330 331 STATIC struct dentry * 332 xfs_compat_handlereq_to_dentry( 333 struct file *parfilp, 334 compat_xfs_fsop_handlereq_t *hreq) 335 { 336 return xfs_handle_to_dentry(parfilp, 337 compat_ptr(hreq->ihandle), hreq->ihandlen); 338 } 339 340 STATIC int 341 xfs_compat_attrlist_by_handle( 342 struct file *parfilp, 343 compat_xfs_fsop_attrlist_handlereq_t __user *p) 344 { 345 compat_xfs_fsop_attrlist_handlereq_t al_hreq; 346 struct dentry *dentry; 347 int error; 348 349 if (!capable(CAP_SYS_ADMIN)) 350 return -EPERM; 351 if (copy_from_user(&al_hreq, p, sizeof(al_hreq))) 352 return -EFAULT; 353 354 dentry = xfs_compat_handlereq_to_dentry(parfilp, &al_hreq.hreq); 355 if (IS_ERR(dentry)) 356 return PTR_ERR(dentry); 357 358 error = xfs_ioc_attr_list(XFS_I(d_inode(dentry)), 359 compat_ptr(al_hreq.buffer), al_hreq.buflen, 360 al_hreq.flags, &p->pos); 361 dput(dentry); 362 return error; 363 } 364 365 STATIC int 366 xfs_compat_attrmulti_by_handle( 367 struct file *parfilp, 368 void __user *arg) 369 { 370 int error; 371 compat_xfs_attr_multiop_t *ops; 372 compat_xfs_fsop_attrmulti_handlereq_t am_hreq; 373 struct dentry *dentry; 374 unsigned int i, size; 375 376 if (!capable(CAP_SYS_ADMIN)) 377 return -EPERM; 378 if (copy_from_user(&am_hreq, arg, 379 sizeof(compat_xfs_fsop_attrmulti_handlereq_t))) 380 return -EFAULT; 381 382 /* overflow check */ 383 if (am_hreq.opcount >= INT_MAX / sizeof(compat_xfs_attr_multiop_t)) 384 return -E2BIG; 385 386 dentry = xfs_compat_handlereq_to_dentry(parfilp, &am_hreq.hreq); 387 if (IS_ERR(dentry)) 388 return PTR_ERR(dentry); 389 390 error = -E2BIG; 391 size = am_hreq.opcount * sizeof(compat_xfs_attr_multiop_t); 392 if (!size || size > 16 * PAGE_SIZE) 393 goto out_dput; 394 395 ops = memdup_user(compat_ptr(am_hreq.ops), size); 396 if (IS_ERR(ops)) { 397 error = PTR_ERR(ops); 398 goto out_dput; 399 } 400 401 error = 0; 402 for (i = 0; i < am_hreq.opcount; i++) { 403 ops[i].am_error = xfs_ioc_attrmulti_one(parfilp, 404 d_inode(dentry), ops[i].am_opcode, 405 compat_ptr(ops[i].am_attrname), 406 compat_ptr(ops[i].am_attrvalue), 407 &ops[i].am_length, ops[i].am_flags); 408 } 409 410 if (copy_to_user(compat_ptr(am_hreq.ops), ops, size)) 411 error = -EFAULT; 412 413 kfree(ops); 414 out_dput: 415 dput(dentry); 416 return error; 417 } 418 419 long 420 xfs_file_compat_ioctl( 421 struct file *filp, 422 unsigned cmd, 423 unsigned long p) 424 { 425 struct inode *inode = file_inode(filp); 426 struct xfs_inode *ip = XFS_I(inode); 427 void __user *arg = compat_ptr(p); 428 int error; 429 430 trace_xfs_file_compat_ioctl(ip); 431 432 switch (cmd) { 433 #if defined(BROKEN_X86_ALIGNMENT) 434 case XFS_IOC_FSGEOMETRY_V1_32: 435 return xfs_compat_ioc_fsgeometry_v1(ip->i_mount, arg); 436 case XFS_IOC_FSGROWFSDATA_32: { 437 struct xfs_growfs_data in; 438 439 if (xfs_compat_growfs_data_copyin(&in, arg)) 440 return -EFAULT; 441 error = mnt_want_write_file(filp); 442 if (error) 443 return error; 444 error = xfs_growfs_data(ip->i_mount, &in); 445 mnt_drop_write_file(filp); 446 return error; 447 } 448 case XFS_IOC_FSGROWFSRT_32: { 449 struct xfs_growfs_rt in; 450 451 if (xfs_compat_growfs_rt_copyin(&in, arg)) 452 return -EFAULT; 453 error = mnt_want_write_file(filp); 454 if (error) 455 return error; 456 error = xfs_growfs_rt(ip->i_mount, &in); 457 mnt_drop_write_file(filp); 458 return error; 459 } 460 #endif 461 /* long changes size, but xfs only copiese out 32 bits */ 462 case XFS_IOC_GETVERSION_32: 463 cmd = _NATIVE_IOC(cmd, long); 464 return xfs_file_ioctl(filp, cmd, p); 465 case XFS_IOC_SWAPEXT_32: { 466 struct xfs_swapext sxp; 467 struct compat_xfs_swapext __user *sxu = arg; 468 469 /* Bulk copy in up to the sx_stat field, then copy bstat */ 470 if (copy_from_user(&sxp, sxu, 471 offsetof(struct xfs_swapext, sx_stat)) || 472 xfs_ioctl32_bstat_copyin(&sxp.sx_stat, &sxu->sx_stat)) 473 return -EFAULT; 474 error = mnt_want_write_file(filp); 475 if (error) 476 return error; 477 error = xfs_ioc_swapext(&sxp); 478 mnt_drop_write_file(filp); 479 return error; 480 } 481 case XFS_IOC_FSBULKSTAT_32: 482 case XFS_IOC_FSBULKSTAT_SINGLE_32: 483 case XFS_IOC_FSINUMBERS_32: 484 return xfs_compat_ioc_fsbulkstat(filp, cmd, arg); 485 case XFS_IOC_FD_TO_HANDLE_32: 486 case XFS_IOC_PATH_TO_HANDLE_32: 487 case XFS_IOC_PATH_TO_FSHANDLE_32: { 488 struct xfs_fsop_handlereq hreq; 489 490 if (xfs_compat_handlereq_copyin(&hreq, arg)) 491 return -EFAULT; 492 cmd = _NATIVE_IOC(cmd, struct xfs_fsop_handlereq); 493 return xfs_find_handle(cmd, &hreq); 494 } 495 case XFS_IOC_OPEN_BY_HANDLE_32: { 496 struct xfs_fsop_handlereq hreq; 497 498 if (xfs_compat_handlereq_copyin(&hreq, arg)) 499 return -EFAULT; 500 return xfs_open_by_handle(filp, &hreq); 501 } 502 case XFS_IOC_READLINK_BY_HANDLE_32: { 503 struct xfs_fsop_handlereq hreq; 504 505 if (xfs_compat_handlereq_copyin(&hreq, arg)) 506 return -EFAULT; 507 return xfs_readlink_by_handle(filp, &hreq); 508 } 509 case XFS_IOC_ATTRLIST_BY_HANDLE_32: 510 return xfs_compat_attrlist_by_handle(filp, arg); 511 case XFS_IOC_ATTRMULTI_BY_HANDLE_32: 512 return xfs_compat_attrmulti_by_handle(filp, arg); 513 default: 514 /* try the native version */ 515 return xfs_file_ioctl(filp, cmd, (unsigned long)arg); 516 } 517 } 518