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