This source file includes following definitions.
- o2info_set_request_error
- o2info_set_request_filled
- o2info_clear_request_filled
- o2info_coherent
- ocfs2_get_inode_attr
- ocfs2_set_inode_attr
- ocfs2_info_handle_blocksize
- ocfs2_info_handle_clustersize
- ocfs2_info_handle_maxslots
- ocfs2_info_handle_label
- ocfs2_info_handle_uuid
- ocfs2_info_handle_fs_features
- ocfs2_info_handle_journal_size
- ocfs2_info_scan_inode_alloc
- ocfs2_info_handle_freeinode
- o2ffg_update_histogram
- o2ffg_update_stats
- ocfs2_info_update_ffg
- ocfs2_info_freefrag_scan_chain
- ocfs2_info_freefrag_scan_bitmap
- ocfs2_info_handle_freefrag
- ocfs2_info_handle_unknown
- ocfs2_info_handle_request
- ocfs2_get_request_ptr
- ocfs2_info_handle
- ocfs2_ioctl
- ocfs2_compat_ioctl
1
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3
4
5
6
7
8
9 #include <linux/fs.h>
10 #include <linux/mount.h>
11 #include <linux/blkdev.h>
12 #include <linux/compat.h>
13
14 #include <cluster/masklog.h>
15
16 #include "ocfs2.h"
17 #include "alloc.h"
18 #include "dlmglue.h"
19 #include "file.h"
20 #include "inode.h"
21 #include "journal.h"
22
23 #include "ocfs2_fs.h"
24 #include "ioctl.h"
25 #include "resize.h"
26 #include "refcounttree.h"
27 #include "sysfile.h"
28 #include "dir.h"
29 #include "buffer_head_io.h"
30 #include "suballoc.h"
31 #include "move_extents.h"
32
33 #define o2info_from_user(a, b) \
34 copy_from_user(&(a), (b), sizeof(a))
35 #define o2info_to_user(a, b) \
36 copy_to_user((typeof(a) __user *)b, &(a), sizeof(a))
37
38
39
40
41
42 static inline void o2info_set_request_error(struct ocfs2_info_request *kreq,
43 struct ocfs2_info_request __user *req)
44 {
45 kreq->ir_flags |= OCFS2_INFO_FL_ERROR;
46 (void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags));
47 }
48
49 static inline void o2info_set_request_filled(struct ocfs2_info_request *req)
50 {
51 req->ir_flags |= OCFS2_INFO_FL_FILLED;
52 }
53
54 static inline void o2info_clear_request_filled(struct ocfs2_info_request *req)
55 {
56 req->ir_flags &= ~OCFS2_INFO_FL_FILLED;
57 }
58
59 static inline int o2info_coherent(struct ocfs2_info_request *req)
60 {
61 return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT));
62 }
63
64 static 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
80 static 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 inode_lock(inode);
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 oldflags = ocfs2_inode->ip_attr;
106 flags = flags & mask;
107 flags |= oldflags & ~mask;
108
109 status = vfs_ioc_setflags_prepare(inode, oldflags, flags);
110 if (status)
111 goto bail_unlock;
112
113 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
114 if (IS_ERR(handle)) {
115 status = PTR_ERR(handle);
116 mlog_errno(status);
117 goto bail_unlock;
118 }
119
120 ocfs2_inode->ip_attr = flags;
121 ocfs2_set_inode_flags(inode);
122
123 status = ocfs2_mark_inode_dirty(handle, inode, bh);
124 if (status < 0)
125 mlog_errno(status);
126
127 ocfs2_commit_trans(osb, handle);
128
129 bail_unlock:
130 ocfs2_inode_unlock(inode, 1);
131 bail:
132 inode_unlock(inode);
133
134 brelse(bh);
135
136 return status;
137 }
138
139 static int ocfs2_info_handle_blocksize(struct inode *inode,
140 struct ocfs2_info_request __user *req)
141 {
142 struct ocfs2_info_blocksize oib;
143
144 if (o2info_from_user(oib, req))
145 return -EFAULT;
146
147 oib.ib_blocksize = inode->i_sb->s_blocksize;
148
149 o2info_set_request_filled(&oib.ib_req);
150
151 if (o2info_to_user(oib, req))
152 return -EFAULT;
153
154 return 0;
155 }
156
157 static int ocfs2_info_handle_clustersize(struct inode *inode,
158 struct ocfs2_info_request __user *req)
159 {
160 struct ocfs2_info_clustersize oic;
161 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
162
163 if (o2info_from_user(oic, req))
164 return -EFAULT;
165
166 oic.ic_clustersize = osb->s_clustersize;
167
168 o2info_set_request_filled(&oic.ic_req);
169
170 if (o2info_to_user(oic, req))
171 return -EFAULT;
172
173 return 0;
174 }
175
176 static int ocfs2_info_handle_maxslots(struct inode *inode,
177 struct ocfs2_info_request __user *req)
178 {
179 struct ocfs2_info_maxslots oim;
180 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
181
182 if (o2info_from_user(oim, req))
183 return -EFAULT;
184
185 oim.im_max_slots = osb->max_slots;
186
187 o2info_set_request_filled(&oim.im_req);
188
189 if (o2info_to_user(oim, req))
190 return -EFAULT;
191
192 return 0;
193 }
194
195 static int ocfs2_info_handle_label(struct inode *inode,
196 struct ocfs2_info_request __user *req)
197 {
198 struct ocfs2_info_label oil;
199 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
200
201 if (o2info_from_user(oil, req))
202 return -EFAULT;
203
204 memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN);
205
206 o2info_set_request_filled(&oil.il_req);
207
208 if (o2info_to_user(oil, req))
209 return -EFAULT;
210
211 return 0;
212 }
213
214 static int ocfs2_info_handle_uuid(struct inode *inode,
215 struct ocfs2_info_request __user *req)
216 {
217 struct ocfs2_info_uuid oiu;
218 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
219
220 if (o2info_from_user(oiu, req))
221 return -EFAULT;
222
223 memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1);
224
225 o2info_set_request_filled(&oiu.iu_req);
226
227 if (o2info_to_user(oiu, req))
228 return -EFAULT;
229
230 return 0;
231 }
232
233 static int ocfs2_info_handle_fs_features(struct inode *inode,
234 struct ocfs2_info_request __user *req)
235 {
236 struct ocfs2_info_fs_features oif;
237 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
238
239 if (o2info_from_user(oif, req))
240 return -EFAULT;
241
242 oif.if_compat_features = osb->s_feature_compat;
243 oif.if_incompat_features = osb->s_feature_incompat;
244 oif.if_ro_compat_features = osb->s_feature_ro_compat;
245
246 o2info_set_request_filled(&oif.if_req);
247
248 if (o2info_to_user(oif, req))
249 return -EFAULT;
250
251 return 0;
252 }
253
254 static int ocfs2_info_handle_journal_size(struct inode *inode,
255 struct ocfs2_info_request __user *req)
256 {
257 struct ocfs2_info_journal_size oij;
258 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
259
260 if (o2info_from_user(oij, req))
261 return -EFAULT;
262
263 oij.ij_journal_size = i_size_read(osb->journal->j_inode);
264
265 o2info_set_request_filled(&oij.ij_req);
266
267 if (o2info_to_user(oij, req))
268 return -EFAULT;
269
270 return 0;
271 }
272
273 static int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb,
274 struct inode *inode_alloc, u64 blkno,
275 struct ocfs2_info_freeinode *fi,
276 u32 slot)
277 {
278 int status = 0, unlock = 0;
279
280 struct buffer_head *bh = NULL;
281 struct ocfs2_dinode *dinode_alloc = NULL;
282
283 if (inode_alloc)
284 inode_lock(inode_alloc);
285
286 if (inode_alloc && o2info_coherent(&fi->ifi_req)) {
287 status = ocfs2_inode_lock(inode_alloc, &bh, 0);
288 if (status < 0) {
289 mlog_errno(status);
290 goto bail;
291 }
292 unlock = 1;
293 } else {
294 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
295 if (status < 0) {
296 mlog_errno(status);
297 goto bail;
298 }
299 }
300
301 dinode_alloc = (struct ocfs2_dinode *)bh->b_data;
302
303 fi->ifi_stat[slot].lfi_total =
304 le32_to_cpu(dinode_alloc->id1.bitmap1.i_total);
305 fi->ifi_stat[slot].lfi_free =
306 le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) -
307 le32_to_cpu(dinode_alloc->id1.bitmap1.i_used);
308
309 bail:
310 if (unlock)
311 ocfs2_inode_unlock(inode_alloc, 0);
312
313 if (inode_alloc)
314 inode_unlock(inode_alloc);
315
316 brelse(bh);
317
318 return status;
319 }
320
321 static int ocfs2_info_handle_freeinode(struct inode *inode,
322 struct ocfs2_info_request __user *req)
323 {
324 u32 i;
325 u64 blkno = -1;
326 char namebuf[40];
327 int status, type = INODE_ALLOC_SYSTEM_INODE;
328 struct ocfs2_info_freeinode *oifi = NULL;
329 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
330 struct inode *inode_alloc = NULL;
331
332 oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL);
333 if (!oifi) {
334 status = -ENOMEM;
335 mlog_errno(status);
336 goto out_err;
337 }
338
339 if (o2info_from_user(*oifi, req)) {
340 status = -EFAULT;
341 goto out_free;
342 }
343
344 oifi->ifi_slotnum = osb->max_slots;
345
346 for (i = 0; i < oifi->ifi_slotnum; i++) {
347 if (o2info_coherent(&oifi->ifi_req)) {
348 inode_alloc = ocfs2_get_system_file_inode(osb, type, i);
349 if (!inode_alloc) {
350 mlog(ML_ERROR, "unable to get alloc inode in "
351 "slot %u\n", i);
352 status = -EIO;
353 goto bail;
354 }
355 } else {
356 ocfs2_sprintf_system_inode_name(namebuf,
357 sizeof(namebuf),
358 type, i);
359 status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
360 namebuf,
361 strlen(namebuf),
362 &blkno);
363 if (status < 0) {
364 status = -ENOENT;
365 goto bail;
366 }
367 }
368
369 status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i);
370
371 iput(inode_alloc);
372 inode_alloc = NULL;
373
374 if (status < 0)
375 goto bail;
376 }
377
378 o2info_set_request_filled(&oifi->ifi_req);
379
380 if (o2info_to_user(*oifi, req)) {
381 status = -EFAULT;
382 goto out_free;
383 }
384
385 status = 0;
386 bail:
387 if (status)
388 o2info_set_request_error(&oifi->ifi_req, req);
389 out_free:
390 kfree(oifi);
391 out_err:
392 return status;
393 }
394
395 static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist,
396 unsigned int chunksize)
397 {
398 u32 index;
399
400 index = __ilog2_u32(chunksize);
401 if (index >= OCFS2_INFO_MAX_HIST)
402 index = OCFS2_INFO_MAX_HIST - 1;
403
404 hist->fc_chunks[index]++;
405 hist->fc_clusters[index] += chunksize;
406 }
407
408 static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats,
409 unsigned int chunksize)
410 {
411 if (chunksize > stats->ffs_max)
412 stats->ffs_max = chunksize;
413
414 if (chunksize < stats->ffs_min)
415 stats->ffs_min = chunksize;
416
417 stats->ffs_avg += chunksize;
418 stats->ffs_free_chunks_real++;
419 }
420
421 static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg,
422 unsigned int chunksize)
423 {
424 o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize);
425 o2ffg_update_stats(&(ffg->iff_ffs), chunksize);
426 }
427
428 static int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb,
429 struct inode *gb_inode,
430 struct ocfs2_dinode *gb_dinode,
431 struct ocfs2_chain_rec *rec,
432 struct ocfs2_info_freefrag *ffg,
433 u32 chunks_in_group)
434 {
435 int status = 0, used;
436 u64 blkno;
437
438 struct buffer_head *bh = NULL;
439 struct ocfs2_group_desc *bg = NULL;
440
441 unsigned int max_bits, num_clusters;
442 unsigned int offset = 0, cluster, chunk;
443 unsigned int chunk_free, last_chunksize = 0;
444
445 if (!le32_to_cpu(rec->c_free))
446 goto bail;
447
448 do {
449 if (!bg)
450 blkno = le64_to_cpu(rec->c_blkno);
451 else
452 blkno = le64_to_cpu(bg->bg_next_group);
453
454 if (bh) {
455 brelse(bh);
456 bh = NULL;
457 }
458
459 if (o2info_coherent(&ffg->iff_req))
460 status = ocfs2_read_group_descriptor(gb_inode,
461 gb_dinode,
462 blkno, &bh);
463 else
464 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
465
466 if (status < 0) {
467 mlog(ML_ERROR, "Can't read the group descriptor # "
468 "%llu from device.", (unsigned long long)blkno);
469 status = -EIO;
470 goto bail;
471 }
472
473 bg = (struct ocfs2_group_desc *)bh->b_data;
474
475 if (!le16_to_cpu(bg->bg_free_bits_count))
476 continue;
477
478 max_bits = le16_to_cpu(bg->bg_bits);
479 offset = 0;
480
481 for (chunk = 0; chunk < chunks_in_group; chunk++) {
482
483
484
485 if ((offset + ffg->iff_chunksize) > max_bits)
486 num_clusters = max_bits - offset;
487 else
488 num_clusters = ffg->iff_chunksize;
489
490 chunk_free = 0;
491 for (cluster = 0; cluster < num_clusters; cluster++) {
492 used = ocfs2_test_bit(offset,
493 (unsigned long *)bg->bg_bitmap);
494
495
496
497
498
499 if (!used) {
500 last_chunksize++;
501 chunk_free++;
502 }
503
504 if (used && last_chunksize) {
505 ocfs2_info_update_ffg(ffg,
506 last_chunksize);
507 last_chunksize = 0;
508 }
509
510 offset++;
511 }
512
513 if (chunk_free == ffg->iff_chunksize)
514 ffg->iff_ffs.ffs_free_chunks++;
515 }
516
517
518
519
520 if (last_chunksize)
521 ocfs2_info_update_ffg(ffg, last_chunksize);
522
523 } while (le64_to_cpu(bg->bg_next_group));
524
525 bail:
526 brelse(bh);
527
528 return status;
529 }
530
531 static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb,
532 struct inode *gb_inode, u64 blkno,
533 struct ocfs2_info_freefrag *ffg)
534 {
535 u32 chunks_in_group;
536 int status = 0, unlock = 0, i;
537
538 struct buffer_head *bh = NULL;
539 struct ocfs2_chain_list *cl = NULL;
540 struct ocfs2_chain_rec *rec = NULL;
541 struct ocfs2_dinode *gb_dinode = NULL;
542
543 if (gb_inode)
544 inode_lock(gb_inode);
545
546 if (o2info_coherent(&ffg->iff_req)) {
547 status = ocfs2_inode_lock(gb_inode, &bh, 0);
548 if (status < 0) {
549 mlog_errno(status);
550 goto bail;
551 }
552 unlock = 1;
553 } else {
554 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
555 if (status < 0) {
556 mlog_errno(status);
557 goto bail;
558 }
559 }
560
561 gb_dinode = (struct ocfs2_dinode *)bh->b_data;
562 cl = &(gb_dinode->id2.i_chain);
563
564
565
566
567
568 if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) {
569 status = -EINVAL;
570 goto bail;
571 }
572
573 memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats));
574
575 ffg->iff_ffs.ffs_min = ~0U;
576 ffg->iff_ffs.ffs_clusters =
577 le32_to_cpu(gb_dinode->id1.bitmap1.i_total);
578 ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters -
579 le32_to_cpu(gb_dinode->id1.bitmap1.i_used);
580
581 chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1;
582
583 for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) {
584 rec = &(cl->cl_recs[i]);
585 status = ocfs2_info_freefrag_scan_chain(osb, gb_inode,
586 gb_dinode,
587 rec, ffg,
588 chunks_in_group);
589 if (status)
590 goto bail;
591 }
592
593 if (ffg->iff_ffs.ffs_free_chunks_real)
594 ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg /
595 ffg->iff_ffs.ffs_free_chunks_real);
596 bail:
597 if (unlock)
598 ocfs2_inode_unlock(gb_inode, 0);
599
600 if (gb_inode)
601 inode_unlock(gb_inode);
602
603 iput(gb_inode);
604 brelse(bh);
605
606 return status;
607 }
608
609 static int ocfs2_info_handle_freefrag(struct inode *inode,
610 struct ocfs2_info_request __user *req)
611 {
612 u64 blkno = -1;
613 char namebuf[40];
614 int status, type = GLOBAL_BITMAP_SYSTEM_INODE;
615
616 struct ocfs2_info_freefrag *oiff;
617 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
618 struct inode *gb_inode = NULL;
619
620 oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL);
621 if (!oiff) {
622 status = -ENOMEM;
623 mlog_errno(status);
624 goto out_err;
625 }
626
627 if (o2info_from_user(*oiff, req)) {
628 status = -EFAULT;
629 goto out_free;
630 }
631
632
633
634 if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) ||
635 (!oiff->iff_chunksize)) {
636 status = -EINVAL;
637 goto bail;
638 }
639
640 if (o2info_coherent(&oiff->iff_req)) {
641 gb_inode = ocfs2_get_system_file_inode(osb, type,
642 OCFS2_INVALID_SLOT);
643 if (!gb_inode) {
644 mlog(ML_ERROR, "unable to get global_bitmap inode\n");
645 status = -EIO;
646 goto bail;
647 }
648 } else {
649 ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type,
650 OCFS2_INVALID_SLOT);
651 status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
652 namebuf,
653 strlen(namebuf),
654 &blkno);
655 if (status < 0) {
656 status = -ENOENT;
657 goto bail;
658 }
659 }
660
661 status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff);
662 if (status < 0)
663 goto bail;
664
665 o2info_set_request_filled(&oiff->iff_req);
666
667 if (o2info_to_user(*oiff, req)) {
668 status = -EFAULT;
669 goto out_free;
670 }
671
672 status = 0;
673 bail:
674 if (status)
675 o2info_set_request_error(&oiff->iff_req, req);
676 out_free:
677 kfree(oiff);
678 out_err:
679 return status;
680 }
681
682 static int ocfs2_info_handle_unknown(struct inode *inode,
683 struct ocfs2_info_request __user *req)
684 {
685 struct ocfs2_info_request oir;
686
687 if (o2info_from_user(oir, req))
688 return -EFAULT;
689
690 o2info_clear_request_filled(&oir);
691
692 if (o2info_to_user(oir, req))
693 return -EFAULT;
694
695 return 0;
696 }
697
698
699
700
701
702
703
704
705 static int ocfs2_info_handle_request(struct inode *inode,
706 struct ocfs2_info_request __user *req)
707 {
708 int status = -EFAULT;
709 struct ocfs2_info_request oir;
710
711 if (o2info_from_user(oir, req))
712 goto bail;
713
714 status = -EINVAL;
715 if (oir.ir_magic != OCFS2_INFO_MAGIC)
716 goto bail;
717
718 switch (oir.ir_code) {
719 case OCFS2_INFO_BLOCKSIZE:
720 if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
721 status = ocfs2_info_handle_blocksize(inode, req);
722 break;
723 case OCFS2_INFO_CLUSTERSIZE:
724 if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
725 status = ocfs2_info_handle_clustersize(inode, req);
726 break;
727 case OCFS2_INFO_MAXSLOTS:
728 if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
729 status = ocfs2_info_handle_maxslots(inode, req);
730 break;
731 case OCFS2_INFO_LABEL:
732 if (oir.ir_size == sizeof(struct ocfs2_info_label))
733 status = ocfs2_info_handle_label(inode, req);
734 break;
735 case OCFS2_INFO_UUID:
736 if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
737 status = ocfs2_info_handle_uuid(inode, req);
738 break;
739 case OCFS2_INFO_FS_FEATURES:
740 if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
741 status = ocfs2_info_handle_fs_features(inode, req);
742 break;
743 case OCFS2_INFO_JOURNAL_SIZE:
744 if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
745 status = ocfs2_info_handle_journal_size(inode, req);
746 break;
747 case OCFS2_INFO_FREEINODE:
748 if (oir.ir_size == sizeof(struct ocfs2_info_freeinode))
749 status = ocfs2_info_handle_freeinode(inode, req);
750 break;
751 case OCFS2_INFO_FREEFRAG:
752 if (oir.ir_size == sizeof(struct ocfs2_info_freefrag))
753 status = ocfs2_info_handle_freefrag(inode, req);
754 break;
755 default:
756 status = ocfs2_info_handle_unknown(inode, req);
757 break;
758 }
759
760 bail:
761 return status;
762 }
763
764 static int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
765 u64 *req_addr, int compat_flag)
766 {
767 int status = -EFAULT;
768 u64 __user *bp = NULL;
769
770 if (compat_flag) {
771 #ifdef CONFIG_COMPAT
772
773
774
775
776 bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests);
777 #else
778 BUG();
779 #endif
780 } else
781 bp = (u64 __user *)(unsigned long)(info->oi_requests);
782
783 if (o2info_from_user(*req_addr, bp + idx))
784 goto bail;
785
786 status = 0;
787 bail:
788 return status;
789 }
790
791
792
793
794
795
796
797
798
799
800
801
802 static int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
803 int compat_flag)
804 {
805 int i, status = 0;
806 u64 req_addr;
807 struct ocfs2_info_request __user *reqp;
808
809 if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
810 (!info->oi_requests)) {
811 status = -EINVAL;
812 goto bail;
813 }
814
815 for (i = 0; i < info->oi_count; i++) {
816
817 status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag);
818 if (status)
819 break;
820
821 reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr;
822 if (!reqp) {
823 status = -EINVAL;
824 goto bail;
825 }
826
827 status = ocfs2_info_handle_request(inode, reqp);
828 if (status)
829 break;
830 }
831
832 bail:
833 return status;
834 }
835
836 long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
837 {
838 struct inode *inode = file_inode(filp);
839 unsigned int flags;
840 int new_clusters;
841 int status;
842 struct ocfs2_space_resv sr;
843 struct ocfs2_new_group_input input;
844 struct reflink_arguments args;
845 const char __user *old_path;
846 const char __user *new_path;
847 bool preserve;
848 struct ocfs2_info info;
849 void __user *argp = (void __user *)arg;
850
851 switch (cmd) {
852 case OCFS2_IOC_GETFLAGS:
853 status = ocfs2_get_inode_attr(inode, &flags);
854 if (status < 0)
855 return status;
856
857 flags &= OCFS2_FL_VISIBLE;
858 return put_user(flags, (int __user *) arg);
859 case OCFS2_IOC_SETFLAGS:
860 if (get_user(flags, (int __user *) arg))
861 return -EFAULT;
862
863 status = mnt_want_write_file(filp);
864 if (status)
865 return status;
866 status = ocfs2_set_inode_attr(inode, flags,
867 OCFS2_FL_MODIFIABLE);
868 mnt_drop_write_file(filp);
869 return status;
870 case OCFS2_IOC_RESVSP:
871 case OCFS2_IOC_RESVSP64:
872 case OCFS2_IOC_UNRESVSP:
873 case OCFS2_IOC_UNRESVSP64:
874 if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
875 return -EFAULT;
876
877 return ocfs2_change_file_space(filp, cmd, &sr);
878 case OCFS2_IOC_GROUP_EXTEND:
879 if (!capable(CAP_SYS_RESOURCE))
880 return -EPERM;
881
882 if (get_user(new_clusters, (int __user *)arg))
883 return -EFAULT;
884
885 status = mnt_want_write_file(filp);
886 if (status)
887 return status;
888 status = ocfs2_group_extend(inode, new_clusters);
889 mnt_drop_write_file(filp);
890 return status;
891 case OCFS2_IOC_GROUP_ADD:
892 case OCFS2_IOC_GROUP_ADD64:
893 if (!capable(CAP_SYS_RESOURCE))
894 return -EPERM;
895
896 if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
897 return -EFAULT;
898
899 status = mnt_want_write_file(filp);
900 if (status)
901 return status;
902 status = ocfs2_group_add(inode, &input);
903 mnt_drop_write_file(filp);
904 return status;
905 case OCFS2_IOC_REFLINK:
906 if (copy_from_user(&args, argp, sizeof(args)))
907 return -EFAULT;
908 old_path = (const char __user *)(unsigned long)args.old_path;
909 new_path = (const char __user *)(unsigned long)args.new_path;
910 preserve = (args.preserve != 0);
911
912 return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
913 case OCFS2_IOC_INFO:
914 if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
915 return -EFAULT;
916
917 return ocfs2_info_handle(inode, &info, 0);
918 case FITRIM:
919 {
920 struct super_block *sb = inode->i_sb;
921 struct request_queue *q = bdev_get_queue(sb->s_bdev);
922 struct fstrim_range range;
923 int ret = 0;
924
925 if (!capable(CAP_SYS_ADMIN))
926 return -EPERM;
927
928 if (!blk_queue_discard(q))
929 return -EOPNOTSUPP;
930
931 if (copy_from_user(&range, argp, sizeof(range)))
932 return -EFAULT;
933
934 range.minlen = max_t(u64, q->limits.discard_granularity,
935 range.minlen);
936 ret = ocfs2_trim_fs(sb, &range);
937 if (ret < 0)
938 return ret;
939
940 if (copy_to_user(argp, &range, sizeof(range)))
941 return -EFAULT;
942
943 return 0;
944 }
945 case OCFS2_IOC_MOVE_EXT:
946 return ocfs2_ioctl_move_extents(filp, argp);
947 default:
948 return -ENOTTY;
949 }
950 }
951
952 #ifdef CONFIG_COMPAT
953 long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
954 {
955 bool preserve;
956 struct reflink_arguments args;
957 struct inode *inode = file_inode(file);
958 struct ocfs2_info info;
959 void __user *argp = (void __user *)arg;
960
961 switch (cmd) {
962 case OCFS2_IOC32_GETFLAGS:
963 cmd = OCFS2_IOC_GETFLAGS;
964 break;
965 case OCFS2_IOC32_SETFLAGS:
966 cmd = OCFS2_IOC_SETFLAGS;
967 break;
968 case OCFS2_IOC_RESVSP:
969 case OCFS2_IOC_RESVSP64:
970 case OCFS2_IOC_UNRESVSP:
971 case OCFS2_IOC_UNRESVSP64:
972 case OCFS2_IOC_GROUP_EXTEND:
973 case OCFS2_IOC_GROUP_ADD:
974 case OCFS2_IOC_GROUP_ADD64:
975 break;
976 case OCFS2_IOC_REFLINK:
977 if (copy_from_user(&args, argp, sizeof(args)))
978 return -EFAULT;
979 preserve = (args.preserve != 0);
980
981 return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
982 compat_ptr(args.new_path), preserve);
983 case OCFS2_IOC_INFO:
984 if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
985 return -EFAULT;
986
987 return ocfs2_info_handle(inode, &info, 1);
988 case OCFS2_IOC_MOVE_EXT:
989 break;
990 default:
991 return -ENOIOCTLCMD;
992 }
993
994 return ocfs2_ioctl(file, cmd, arg);
995 }
996 #endif