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8#include <linux/fs.h>
9#include <linux/mount.h>
10#include <linux/compat.h>
11
12#include <cluster/masklog.h>
13
14#include "ocfs2.h"
15#include "alloc.h"
16#include "dlmglue.h"
17#include "file.h"
18#include "inode.h"
19#include "journal.h"
20
21#include "ocfs2_fs.h"
22#include "ioctl.h"
23#include "resize.h"
24#include "refcounttree.h"
25
26#include <linux/ext2_fs.h>
27
28#define o2info_from_user(a, b) \
29 copy_from_user(&(a), (b), sizeof(a))
30#define o2info_to_user(a, b) \
31 copy_to_user((typeof(a) __user *)b, &(a), sizeof(a))
32
33
34
35
36
37
38static inline void __o2info_set_request_error(struct ocfs2_info_request *kreq,
39 struct ocfs2_info_request __user *req)
40{
41 kreq->ir_flags |= OCFS2_INFO_FL_ERROR;
42 (void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags));
43}
44
45#define o2info_set_request_error(a, b) \
46 __o2info_set_request_error((struct ocfs2_info_request *)&(a), b)
47
48static inline void __o2info_set_request_filled(struct ocfs2_info_request *req)
49{
50 req->ir_flags |= OCFS2_INFO_FL_FILLED;
51}
52
53#define o2info_set_request_filled(a) \
54 __o2info_set_request_filled((struct ocfs2_info_request *)&(a))
55
56static inline void __o2info_clear_request_filled(struct ocfs2_info_request *req)
57{
58 req->ir_flags &= ~OCFS2_INFO_FL_FILLED;
59}
60
61#define o2info_clear_request_filled(a) \
62 __o2info_clear_request_filled((struct ocfs2_info_request *)&(a))
63
64static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
65{
66 int status;
67
68 status = ocfs2_inode_lock(inode, NULL, 0);
69 if (status < 0) {
70 mlog_errno(status);
71 return status;
72 }
73 ocfs2_get_inode_flags(OCFS2_I(inode));
74 *flags = OCFS2_I(inode)->ip_attr;
75 ocfs2_inode_unlock(inode, 0);
76
77 return status;
78}
79
80static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
81 unsigned mask)
82{
83 struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
84 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
85 handle_t *handle = NULL;
86 struct buffer_head *bh = NULL;
87 unsigned oldflags;
88 int status;
89
90 mutex_lock(&inode->i_mutex);
91
92 status = ocfs2_inode_lock(inode, &bh, 1);
93 if (status < 0) {
94 mlog_errno(status);
95 goto bail;
96 }
97
98 status = -EACCES;
99 if (!inode_owner_or_capable(inode))
100 goto bail_unlock;
101
102 if (!S_ISDIR(inode->i_mode))
103 flags &= ~OCFS2_DIRSYNC_FL;
104
105 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
106 if (IS_ERR(handle)) {
107 status = PTR_ERR(handle);
108 mlog_errno(status);
109 goto bail_unlock;
110 }
111
112 oldflags = ocfs2_inode->ip_attr;
113 flags = flags & mask;
114 flags |= oldflags & ~mask;
115
116
117
118
119
120 status = -EPERM;
121 if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
122 (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
123 if (!capable(CAP_LINUX_IMMUTABLE))
124 goto bail_unlock;
125 }
126
127 ocfs2_inode->ip_attr = flags;
128 ocfs2_set_inode_flags(inode);
129
130 status = ocfs2_mark_inode_dirty(handle, inode, bh);
131 if (status < 0)
132 mlog_errno(status);
133
134 ocfs2_commit_trans(osb, handle);
135bail_unlock:
136 ocfs2_inode_unlock(inode, 1);
137bail:
138 mutex_unlock(&inode->i_mutex);
139
140 brelse(bh);
141
142 return status;
143}
144
145int ocfs2_info_handle_blocksize(struct inode *inode,
146 struct ocfs2_info_request __user *req)
147{
148 int status = -EFAULT;
149 struct ocfs2_info_blocksize oib;
150
151 if (o2info_from_user(oib, req))
152 goto bail;
153
154 oib.ib_blocksize = inode->i_sb->s_blocksize;
155
156 o2info_set_request_filled(oib);
157
158 if (o2info_to_user(oib, req))
159 goto bail;
160
161 status = 0;
162bail:
163 if (status)
164 o2info_set_request_error(oib, req);
165
166 return status;
167}
168
169int ocfs2_info_handle_clustersize(struct inode *inode,
170 struct ocfs2_info_request __user *req)
171{
172 int status = -EFAULT;
173 struct ocfs2_info_clustersize oic;
174 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
175
176 if (o2info_from_user(oic, req))
177 goto bail;
178
179 oic.ic_clustersize = osb->s_clustersize;
180
181 o2info_set_request_filled(oic);
182
183 if (o2info_to_user(oic, req))
184 goto bail;
185
186 status = 0;
187bail:
188 if (status)
189 o2info_set_request_error(oic, req);
190
191 return status;
192}
193
194int ocfs2_info_handle_maxslots(struct inode *inode,
195 struct ocfs2_info_request __user *req)
196{
197 int status = -EFAULT;
198 struct ocfs2_info_maxslots oim;
199 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
200
201 if (o2info_from_user(oim, req))
202 goto bail;
203
204 oim.im_max_slots = osb->max_slots;
205
206 o2info_set_request_filled(oim);
207
208 if (o2info_to_user(oim, req))
209 goto bail;
210
211 status = 0;
212bail:
213 if (status)
214 o2info_set_request_error(oim, req);
215
216 return status;
217}
218
219int ocfs2_info_handle_label(struct inode *inode,
220 struct ocfs2_info_request __user *req)
221{
222 int status = -EFAULT;
223 struct ocfs2_info_label oil;
224 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
225
226 if (o2info_from_user(oil, req))
227 goto bail;
228
229 memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN);
230
231 o2info_set_request_filled(oil);
232
233 if (o2info_to_user(oil, req))
234 goto bail;
235
236 status = 0;
237bail:
238 if (status)
239 o2info_set_request_error(oil, req);
240
241 return status;
242}
243
244int ocfs2_info_handle_uuid(struct inode *inode,
245 struct ocfs2_info_request __user *req)
246{
247 int status = -EFAULT;
248 struct ocfs2_info_uuid oiu;
249 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
250
251 if (o2info_from_user(oiu, req))
252 goto bail;
253
254 memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1);
255
256 o2info_set_request_filled(oiu);
257
258 if (o2info_to_user(oiu, req))
259 goto bail;
260
261 status = 0;
262bail:
263 if (status)
264 o2info_set_request_error(oiu, req);
265
266 return status;
267}
268
269int ocfs2_info_handle_fs_features(struct inode *inode,
270 struct ocfs2_info_request __user *req)
271{
272 int status = -EFAULT;
273 struct ocfs2_info_fs_features oif;
274 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
275
276 if (o2info_from_user(oif, req))
277 goto bail;
278
279 oif.if_compat_features = osb->s_feature_compat;
280 oif.if_incompat_features = osb->s_feature_incompat;
281 oif.if_ro_compat_features = osb->s_feature_ro_compat;
282
283 o2info_set_request_filled(oif);
284
285 if (o2info_to_user(oif, req))
286 goto bail;
287
288 status = 0;
289bail:
290 if (status)
291 o2info_set_request_error(oif, req);
292
293 return status;
294}
295
296int ocfs2_info_handle_journal_size(struct inode *inode,
297 struct ocfs2_info_request __user *req)
298{
299 int status = -EFAULT;
300 struct ocfs2_info_journal_size oij;
301 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
302
303 if (o2info_from_user(oij, req))
304 goto bail;
305
306 oij.ij_journal_size = osb->journal->j_inode->i_size;
307
308 o2info_set_request_filled(oij);
309
310 if (o2info_to_user(oij, req))
311 goto bail;
312
313 status = 0;
314bail:
315 if (status)
316 o2info_set_request_error(oij, req);
317
318 return status;
319}
320
321int ocfs2_info_handle_unknown(struct inode *inode,
322 struct ocfs2_info_request __user *req)
323{
324 int status = -EFAULT;
325 struct ocfs2_info_request oir;
326
327 if (o2info_from_user(oir, req))
328 goto bail;
329
330 o2info_clear_request_filled(oir);
331
332 if (o2info_to_user(oir, req))
333 goto bail;
334
335 status = 0;
336bail:
337 if (status)
338 o2info_set_request_error(oir, req);
339
340 return status;
341}
342
343
344
345
346
347
348
349
350int ocfs2_info_handle_request(struct inode *inode,
351 struct ocfs2_info_request __user *req)
352{
353 int status = -EFAULT;
354 struct ocfs2_info_request oir;
355
356 if (o2info_from_user(oir, req))
357 goto bail;
358
359 status = -EINVAL;
360 if (oir.ir_magic != OCFS2_INFO_MAGIC)
361 goto bail;
362
363 switch (oir.ir_code) {
364 case OCFS2_INFO_BLOCKSIZE:
365 if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
366 status = ocfs2_info_handle_blocksize(inode, req);
367 break;
368 case OCFS2_INFO_CLUSTERSIZE:
369 if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
370 status = ocfs2_info_handle_clustersize(inode, req);
371 break;
372 case OCFS2_INFO_MAXSLOTS:
373 if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
374 status = ocfs2_info_handle_maxslots(inode, req);
375 break;
376 case OCFS2_INFO_LABEL:
377 if (oir.ir_size == sizeof(struct ocfs2_info_label))
378 status = ocfs2_info_handle_label(inode, req);
379 break;
380 case OCFS2_INFO_UUID:
381 if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
382 status = ocfs2_info_handle_uuid(inode, req);
383 break;
384 case OCFS2_INFO_FS_FEATURES:
385 if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
386 status = ocfs2_info_handle_fs_features(inode, req);
387 break;
388 case OCFS2_INFO_JOURNAL_SIZE:
389 if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
390 status = ocfs2_info_handle_journal_size(inode, req);
391 break;
392 default:
393 status = ocfs2_info_handle_unknown(inode, req);
394 break;
395 }
396
397bail:
398 return status;
399}
400
401int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
402 u64 *req_addr, int compat_flag)
403{
404 int status = -EFAULT;
405 u64 __user *bp = NULL;
406
407 if (compat_flag) {
408#ifdef CONFIG_COMPAT
409
410
411
412
413 bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests);
414#else
415 BUG();
416#endif
417 } else
418 bp = (u64 __user *)(unsigned long)(info->oi_requests);
419
420 if (o2info_from_user(*req_addr, bp + idx))
421 goto bail;
422
423 status = 0;
424bail:
425 return status;
426}
427
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437
438
439int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
440 int compat_flag)
441{
442 int i, status = 0;
443 u64 req_addr;
444 struct ocfs2_info_request __user *reqp;
445
446 if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
447 (!info->oi_requests)) {
448 status = -EINVAL;
449 goto bail;
450 }
451
452 for (i = 0; i < info->oi_count; i++) {
453
454 status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag);
455 if (status)
456 break;
457
458 reqp = (struct ocfs2_info_request *)(unsigned long)req_addr;
459 if (!reqp) {
460 status = -EINVAL;
461 goto bail;
462 }
463
464 status = ocfs2_info_handle_request(inode, reqp);
465 if (status)
466 break;
467 }
468
469bail:
470 return status;
471}
472
473long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
474{
475 struct inode *inode = filp->f_path.dentry->d_inode;
476 unsigned int flags;
477 int new_clusters;
478 int status;
479 struct ocfs2_space_resv sr;
480 struct ocfs2_new_group_input input;
481 struct reflink_arguments args;
482 const char *old_path, *new_path;
483 bool preserve;
484 struct ocfs2_info info;
485
486 switch (cmd) {
487 case OCFS2_IOC_GETFLAGS:
488 status = ocfs2_get_inode_attr(inode, &flags);
489 if (status < 0)
490 return status;
491
492 flags &= OCFS2_FL_VISIBLE;
493 return put_user(flags, (int __user *) arg);
494 case OCFS2_IOC_SETFLAGS:
495 if (get_user(flags, (int __user *) arg))
496 return -EFAULT;
497
498 status = mnt_want_write(filp->f_path.mnt);
499 if (status)
500 return status;
501 status = ocfs2_set_inode_attr(inode, flags,
502 OCFS2_FL_MODIFIABLE);
503 mnt_drop_write(filp->f_path.mnt);
504 return status;
505 case OCFS2_IOC_RESVSP:
506 case OCFS2_IOC_RESVSP64:
507 case OCFS2_IOC_UNRESVSP:
508 case OCFS2_IOC_UNRESVSP64:
509 if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
510 return -EFAULT;
511
512 return ocfs2_change_file_space(filp, cmd, &sr);
513 case OCFS2_IOC_GROUP_EXTEND:
514 if (!capable(CAP_SYS_RESOURCE))
515 return -EPERM;
516
517 if (get_user(new_clusters, (int __user *)arg))
518 return -EFAULT;
519
520 return ocfs2_group_extend(inode, new_clusters);
521 case OCFS2_IOC_GROUP_ADD:
522 case OCFS2_IOC_GROUP_ADD64:
523 if (!capable(CAP_SYS_RESOURCE))
524 return -EPERM;
525
526 if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
527 return -EFAULT;
528
529 return ocfs2_group_add(inode, &input);
530 case OCFS2_IOC_REFLINK:
531 if (copy_from_user(&args, (struct reflink_arguments *)arg,
532 sizeof(args)))
533 return -EFAULT;
534 old_path = (const char *)(unsigned long)args.old_path;
535 new_path = (const char *)(unsigned long)args.new_path;
536 preserve = (args.preserve != 0);
537
538 return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
539 case OCFS2_IOC_INFO:
540 if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
541 sizeof(struct ocfs2_info)))
542 return -EFAULT;
543
544 return ocfs2_info_handle(inode, &info, 0);
545 default:
546 return -ENOTTY;
547 }
548}
549
550#ifdef CONFIG_COMPAT
551long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
552{
553 bool preserve;
554 struct reflink_arguments args;
555 struct inode *inode = file->f_path.dentry->d_inode;
556 struct ocfs2_info info;
557
558 switch (cmd) {
559 case OCFS2_IOC32_GETFLAGS:
560 cmd = OCFS2_IOC_GETFLAGS;
561 break;
562 case OCFS2_IOC32_SETFLAGS:
563 cmd = OCFS2_IOC_SETFLAGS;
564 break;
565 case OCFS2_IOC_RESVSP:
566 case OCFS2_IOC_RESVSP64:
567 case OCFS2_IOC_UNRESVSP:
568 case OCFS2_IOC_UNRESVSP64:
569 case OCFS2_IOC_GROUP_EXTEND:
570 case OCFS2_IOC_GROUP_ADD:
571 case OCFS2_IOC_GROUP_ADD64:
572 break;
573 case OCFS2_IOC_REFLINK:
574 if (copy_from_user(&args, (struct reflink_arguments *)arg,
575 sizeof(args)))
576 return -EFAULT;
577 preserve = (args.preserve != 0);
578
579 return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
580 compat_ptr(args.new_path), preserve);
581 case OCFS2_IOC_INFO:
582 if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
583 sizeof(struct ocfs2_info)))
584 return -EFAULT;
585
586 return ocfs2_info_handle(inode, &info, 1);
587 default:
588 return -ENOIOCTLCMD;
589 }
590
591 return ocfs2_ioctl(file, cmd, arg);
592}
593#endif
594
