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
xfs_compat_flock64_copyin(xfs_flock64_t * bf,compat_xfs_flock64_t __user * arg32)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
xfs_compat_ioc_fsgeometry_v1(struct xfs_mount * mp,compat_xfs_fsop_geom_v1_t __user * arg32)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, &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
xfs_compat_growfs_data_copyin(struct xfs_growfs_data * in,compat_xfs_growfs_data_t __user * arg32)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
xfs_compat_growfs_rt_copyin(struct xfs_growfs_rt * in,compat_xfs_growfs_rt_t __user * arg32)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
xfs_fsinumbers_fmt_compat(struct xfs_ibulk * breq,const struct xfs_inumbers * ig)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
xfs_ioctl32_bstime_copyin(xfs_bstime_t * bstime,compat_xfs_bstime_t __user * bstime32)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
xfs_ioctl32_bstat_copyin(struct xfs_bstat * bstat,struct compat_xfs_bstat __user * bstat32)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
xfs_bstime_store_compat(compat_xfs_bstime_t __user * p32,const xfs_bstime_t * p)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
xfs_fsbulkstat_one_fmt_compat(struct xfs_ibulk * breq,const struct xfs_bulkstat * bstat)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
xfs_compat_ioc_fsbulkstat(struct file * file,unsigned int cmd,struct compat_xfs_fsop_bulkreq __user * p32)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_is_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
xfs_compat_handlereq_copyin(xfs_fsop_handlereq_t * hreq,compat_xfs_fsop_handlereq_t __user * arg32)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 *
xfs_compat_handlereq_to_dentry(struct file * parfilp,compat_xfs_fsop_handlereq_t * hreq)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
xfs_compat_attrlist_by_handle(struct file * parfilp,compat_xfs_fsop_attrlist_handlereq_t __user * p)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
xfs_compat_attrmulti_by_handle(struct file * parfilp,void __user * arg)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
xfs_file_compat_ioctl(struct file * filp,unsigned cmd,unsigned long p)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
