1
2
3
4
5
6
7
8#include <linux/fs.h>
9#include <linux/mount.h>
10#include <linux/blkdev.h>
11#include <linux/compat.h>
12
13#include <cluster/masklog.h>
14
15#include "ocfs2.h"
16#include "alloc.h"
17#include "dlmglue.h"
18#include "file.h"
19#include "inode.h"
20#include "journal.h"
21
22#include "ocfs2_fs.h"
23#include "ioctl.h"
24#include "resize.h"
25#include "refcounttree.h"
26#include "sysfile.h"
27#include "dir.h"
28#include "buffer_head_io.h"
29#include "suballoc.h"
30#include "move_extents.h"
31
32#define o2info_from_user(a, b) \
33 copy_from_user(&(a), (b), sizeof(a))
34#define o2info_to_user(a, b) \
35 copy_to_user((typeof(a) __user *)b, &(a), sizeof(a))
36
37
38
39
40
41
42static 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
49static inline void o2info_set_request_filled(struct ocfs2_info_request *req)
50{
51 req->ir_flags |= OCFS2_INFO_FL_FILLED;
52}
53
54static inline void o2info_clear_request_filled(struct ocfs2_info_request *req)
55{
56 req->ir_flags &= ~OCFS2_INFO_FL_FILLED;
57}
58
59static inline int o2info_coherent(struct ocfs2_info_request *req)
60{
61 return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT));
62}
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 oldflags = ocfs2_inode->ip_attr;
106 flags = flags & mask;
107 flags |= oldflags & ~mask;
108
109
110
111
112
113 status = -EPERM;
114 if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
115 (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
116 if (!capable(CAP_LINUX_IMMUTABLE))
117 goto bail_unlock;
118 }
119
120 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
121 if (IS_ERR(handle)) {
122 status = PTR_ERR(handle);
123 mlog_errno(status);
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);
135
136bail_unlock:
137 ocfs2_inode_unlock(inode, 1);
138bail:
139 mutex_unlock(&inode->i_mutex);
140
141 brelse(bh);
142
143 return status;
144}
145
146static int ocfs2_info_handle_blocksize(struct inode *inode,
147 struct ocfs2_info_request __user *req)
148{
149 int status = -EFAULT;
150 struct ocfs2_info_blocksize oib;
151
152 if (o2info_from_user(oib, req))
153 goto bail;
154
155 oib.ib_blocksize = inode->i_sb->s_blocksize;
156
157 o2info_set_request_filled(&oib.ib_req);
158
159 if (o2info_to_user(oib, req))
160 goto bail;
161
162 status = 0;
163bail:
164 if (status)
165 o2info_set_request_error(&oib.ib_req, req);
166
167 return status;
168}
169
170static int ocfs2_info_handle_clustersize(struct inode *inode,
171 struct ocfs2_info_request __user *req)
172{
173 int status = -EFAULT;
174 struct ocfs2_info_clustersize oic;
175 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
176
177 if (o2info_from_user(oic, req))
178 goto bail;
179
180 oic.ic_clustersize = osb->s_clustersize;
181
182 o2info_set_request_filled(&oic.ic_req);
183
184 if (o2info_to_user(oic, req))
185 goto bail;
186
187 status = 0;
188bail:
189 if (status)
190 o2info_set_request_error(&oic.ic_req, req);
191
192 return status;
193}
194
195static int ocfs2_info_handle_maxslots(struct inode *inode,
196 struct ocfs2_info_request __user *req)
197{
198 int status = -EFAULT;
199 struct ocfs2_info_maxslots oim;
200 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
201
202 if (o2info_from_user(oim, req))
203 goto bail;
204
205 oim.im_max_slots = osb->max_slots;
206
207 o2info_set_request_filled(&oim.im_req);
208
209 if (o2info_to_user(oim, req))
210 goto bail;
211
212 status = 0;
213bail:
214 if (status)
215 o2info_set_request_error(&oim.im_req, req);
216
217 return status;
218}
219
220static int ocfs2_info_handle_label(struct inode *inode,
221 struct ocfs2_info_request __user *req)
222{
223 int status = -EFAULT;
224 struct ocfs2_info_label oil;
225 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
226
227 if (o2info_from_user(oil, req))
228 goto bail;
229
230 memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN);
231
232 o2info_set_request_filled(&oil.il_req);
233
234 if (o2info_to_user(oil, req))
235 goto bail;
236
237 status = 0;
238bail:
239 if (status)
240 o2info_set_request_error(&oil.il_req, req);
241
242 return status;
243}
244
245static int ocfs2_info_handle_uuid(struct inode *inode,
246 struct ocfs2_info_request __user *req)
247{
248 int status = -EFAULT;
249 struct ocfs2_info_uuid oiu;
250 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
251
252 if (o2info_from_user(oiu, req))
253 goto bail;
254
255 memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1);
256
257 o2info_set_request_filled(&oiu.iu_req);
258
259 if (o2info_to_user(oiu, req))
260 goto bail;
261
262 status = 0;
263bail:
264 if (status)
265 o2info_set_request_error(&oiu.iu_req, req);
266
267 return status;
268}
269
270static int ocfs2_info_handle_fs_features(struct inode *inode,
271 struct ocfs2_info_request __user *req)
272{
273 int status = -EFAULT;
274 struct ocfs2_info_fs_features oif;
275 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
276
277 if (o2info_from_user(oif, req))
278 goto bail;
279
280 oif.if_compat_features = osb->s_feature_compat;
281 oif.if_incompat_features = osb->s_feature_incompat;
282 oif.if_ro_compat_features = osb->s_feature_ro_compat;
283
284 o2info_set_request_filled(&oif.if_req);
285
286 if (o2info_to_user(oif, req))
287 goto bail;
288
289 status = 0;
290bail:
291 if (status)
292 o2info_set_request_error(&oif.if_req, req);
293
294 return status;
295}
296
297static int ocfs2_info_handle_journal_size(struct inode *inode,
298 struct ocfs2_info_request __user *req)
299{
300 int status = -EFAULT;
301 struct ocfs2_info_journal_size oij;
302 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
303
304 if (o2info_from_user(oij, req))
305 goto bail;
306
307 oij.ij_journal_size = i_size_read(osb->journal->j_inode);
308
309 o2info_set_request_filled(&oij.ij_req);
310
311 if (o2info_to_user(oij, req))
312 goto bail;
313
314 status = 0;
315bail:
316 if (status)
317 o2info_set_request_error(&oij.ij_req, req);
318
319 return status;
320}
321
322static int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb,
323 struct inode *inode_alloc, u64 blkno,
324 struct ocfs2_info_freeinode *fi,
325 u32 slot)
326{
327 int status = 0, unlock = 0;
328
329 struct buffer_head *bh = NULL;
330 struct ocfs2_dinode *dinode_alloc = NULL;
331
332 if (inode_alloc)
333 mutex_lock(&inode_alloc->i_mutex);
334
335 if (o2info_coherent(&fi->ifi_req)) {
336 status = ocfs2_inode_lock(inode_alloc, &bh, 0);
337 if (status < 0) {
338 mlog_errno(status);
339 goto bail;
340 }
341 unlock = 1;
342 } else {
343 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
344 if (status < 0) {
345 mlog_errno(status);
346 goto bail;
347 }
348 }
349
350 dinode_alloc = (struct ocfs2_dinode *)bh->b_data;
351
352 fi->ifi_stat[slot].lfi_total =
353 le32_to_cpu(dinode_alloc->id1.bitmap1.i_total);
354 fi->ifi_stat[slot].lfi_free =
355 le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) -
356 le32_to_cpu(dinode_alloc->id1.bitmap1.i_used);
357
358bail:
359 if (unlock)
360 ocfs2_inode_unlock(inode_alloc, 0);
361
362 if (inode_alloc)
363 mutex_unlock(&inode_alloc->i_mutex);
364
365 brelse(bh);
366
367 return status;
368}
369
370static int ocfs2_info_handle_freeinode(struct inode *inode,
371 struct ocfs2_info_request __user *req)
372{
373 u32 i;
374 u64 blkno = -1;
375 char namebuf[40];
376 int status = -EFAULT, type = INODE_ALLOC_SYSTEM_INODE;
377 struct ocfs2_info_freeinode *oifi = NULL;
378 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
379 struct inode *inode_alloc = NULL;
380
381 oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL);
382 if (!oifi) {
383 status = -ENOMEM;
384 mlog_errno(status);
385 goto out_err;
386 }
387
388 if (o2info_from_user(*oifi, req))
389 goto bail;
390
391 oifi->ifi_slotnum = osb->max_slots;
392
393 for (i = 0; i < oifi->ifi_slotnum; i++) {
394 if (o2info_coherent(&oifi->ifi_req)) {
395 inode_alloc = ocfs2_get_system_file_inode(osb, type, i);
396 if (!inode_alloc) {
397 mlog(ML_ERROR, "unable to get alloc inode in "
398 "slot %u\n", i);
399 status = -EIO;
400 goto bail;
401 }
402 } else {
403 ocfs2_sprintf_system_inode_name(namebuf,
404 sizeof(namebuf),
405 type, i);
406 status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
407 namebuf,
408 strlen(namebuf),
409 &blkno);
410 if (status < 0) {
411 status = -ENOENT;
412 goto bail;
413 }
414 }
415
416 status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i);
417
418 iput(inode_alloc);
419 inode_alloc = NULL;
420
421 if (status < 0)
422 goto bail;
423 }
424
425 o2info_set_request_filled(&oifi->ifi_req);
426
427 if (o2info_to_user(*oifi, req))
428 goto bail;
429
430 status = 0;
431bail:
432 if (status)
433 o2info_set_request_error(&oifi->ifi_req, req);
434
435 kfree(oifi);
436out_err:
437 return status;
438}
439
440static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist,
441 unsigned int chunksize)
442{
443 int index;
444
445 index = __ilog2_u32(chunksize);
446 if (index >= OCFS2_INFO_MAX_HIST)
447 index = OCFS2_INFO_MAX_HIST - 1;
448
449 hist->fc_chunks[index]++;
450 hist->fc_clusters[index] += chunksize;
451}
452
453static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats,
454 unsigned int chunksize)
455{
456 if (chunksize > stats->ffs_max)
457 stats->ffs_max = chunksize;
458
459 if (chunksize < stats->ffs_min)
460 stats->ffs_min = chunksize;
461
462 stats->ffs_avg += chunksize;
463 stats->ffs_free_chunks_real++;
464}
465
466static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg,
467 unsigned int chunksize)
468{
469 o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize);
470 o2ffg_update_stats(&(ffg->iff_ffs), chunksize);
471}
472
473static int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb,
474 struct inode *gb_inode,
475 struct ocfs2_dinode *gb_dinode,
476 struct ocfs2_chain_rec *rec,
477 struct ocfs2_info_freefrag *ffg,
478 u32 chunks_in_group)
479{
480 int status = 0, used;
481 u64 blkno;
482
483 struct buffer_head *bh = NULL;
484 struct ocfs2_group_desc *bg = NULL;
485
486 unsigned int max_bits, num_clusters;
487 unsigned int offset = 0, cluster, chunk;
488 unsigned int chunk_free, last_chunksize = 0;
489
490 if (!le32_to_cpu(rec->c_free))
491 goto bail;
492
493 do {
494 if (!bg)
495 blkno = le64_to_cpu(rec->c_blkno);
496 else
497 blkno = le64_to_cpu(bg->bg_next_group);
498
499 if (bh) {
500 brelse(bh);
501 bh = NULL;
502 }
503
504 if (o2info_coherent(&ffg->iff_req))
505 status = ocfs2_read_group_descriptor(gb_inode,
506 gb_dinode,
507 blkno, &bh);
508 else
509 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
510
511 if (status < 0) {
512 mlog(ML_ERROR, "Can't read the group descriptor # "
513 "%llu from device.", (unsigned long long)blkno);
514 status = -EIO;
515 goto bail;
516 }
517
518 bg = (struct ocfs2_group_desc *)bh->b_data;
519
520 if (!le16_to_cpu(bg->bg_free_bits_count))
521 continue;
522
523 max_bits = le16_to_cpu(bg->bg_bits);
524 offset = 0;
525
526 for (chunk = 0; chunk < chunks_in_group; chunk++) {
527
528
529
530 if ((offset + ffg->iff_chunksize) > max_bits)
531 num_clusters = max_bits - offset;
532 else
533 num_clusters = ffg->iff_chunksize;
534
535 chunk_free = 0;
536 for (cluster = 0; cluster < num_clusters; cluster++) {
537 used = ocfs2_test_bit(offset,
538 (unsigned long *)bg->bg_bitmap);
539
540
541
542
543
544 if (!used) {
545 last_chunksize++;
546 chunk_free++;
547 }
548
549 if (used && last_chunksize) {
550 ocfs2_info_update_ffg(ffg,
551 last_chunksize);
552 last_chunksize = 0;
553 }
554
555 offset++;
556 }
557
558 if (chunk_free == ffg->iff_chunksize)
559 ffg->iff_ffs.ffs_free_chunks++;
560 }
561
562
563
564
565 if (last_chunksize)
566 ocfs2_info_update_ffg(ffg, last_chunksize);
567
568 } while (le64_to_cpu(bg->bg_next_group));
569
570bail:
571 brelse(bh);
572
573 return status;
574}
575
576static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb,
577 struct inode *gb_inode, u64 blkno,
578 struct ocfs2_info_freefrag *ffg)
579{
580 u32 chunks_in_group;
581 int status = 0, unlock = 0, i;
582
583 struct buffer_head *bh = NULL;
584 struct ocfs2_chain_list *cl = NULL;
585 struct ocfs2_chain_rec *rec = NULL;
586 struct ocfs2_dinode *gb_dinode = NULL;
587
588 if (gb_inode)
589 mutex_lock(&gb_inode->i_mutex);
590
591 if (o2info_coherent(&ffg->iff_req)) {
592 status = ocfs2_inode_lock(gb_inode, &bh, 0);
593 if (status < 0) {
594 mlog_errno(status);
595 goto bail;
596 }
597 unlock = 1;
598 } else {
599 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
600 if (status < 0) {
601 mlog_errno(status);
602 goto bail;
603 }
604 }
605
606 gb_dinode = (struct ocfs2_dinode *)bh->b_data;
607 cl = &(gb_dinode->id2.i_chain);
608
609
610
611
612
613 if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) {
614 status = -EINVAL;
615 goto bail;
616 }
617
618 memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats));
619
620 ffg->iff_ffs.ffs_min = ~0U;
621 ffg->iff_ffs.ffs_clusters =
622 le32_to_cpu(gb_dinode->id1.bitmap1.i_total);
623 ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters -
624 le32_to_cpu(gb_dinode->id1.bitmap1.i_used);
625
626 chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1;
627
628 for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) {
629 rec = &(cl->cl_recs[i]);
630 status = ocfs2_info_freefrag_scan_chain(osb, gb_inode,
631 gb_dinode,
632 rec, ffg,
633 chunks_in_group);
634 if (status)
635 goto bail;
636 }
637
638 if (ffg->iff_ffs.ffs_free_chunks_real)
639 ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg /
640 ffg->iff_ffs.ffs_free_chunks_real);
641bail:
642 if (unlock)
643 ocfs2_inode_unlock(gb_inode, 0);
644
645 if (gb_inode)
646 mutex_unlock(&gb_inode->i_mutex);
647
648 if (gb_inode)
649 iput(gb_inode);
650
651 brelse(bh);
652
653 return status;
654}
655
656static int ocfs2_info_handle_freefrag(struct inode *inode,
657 struct ocfs2_info_request __user *req)
658{
659 u64 blkno = -1;
660 char namebuf[40];
661 int status = -EFAULT, type = GLOBAL_BITMAP_SYSTEM_INODE;
662
663 struct ocfs2_info_freefrag *oiff;
664 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
665 struct inode *gb_inode = NULL;
666
667 oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL);
668 if (!oiff) {
669 status = -ENOMEM;
670 mlog_errno(status);
671 goto out_err;
672 }
673
674 if (o2info_from_user(*oiff, req))
675 goto bail;
676
677
678
679 if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) ||
680 (!oiff->iff_chunksize)) {
681 status = -EINVAL;
682 goto bail;
683 }
684
685 if (o2info_coherent(&oiff->iff_req)) {
686 gb_inode = ocfs2_get_system_file_inode(osb, type,
687 OCFS2_INVALID_SLOT);
688 if (!gb_inode) {
689 mlog(ML_ERROR, "unable to get global_bitmap inode\n");
690 status = -EIO;
691 goto bail;
692 }
693 } else {
694 ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type,
695 OCFS2_INVALID_SLOT);
696 status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
697 namebuf,
698 strlen(namebuf),
699 &blkno);
700 if (status < 0) {
701 status = -ENOENT;
702 goto bail;
703 }
704 }
705
706 status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff);
707 if (status < 0)
708 goto bail;
709
710 o2info_set_request_filled(&oiff->iff_req);
711
712 if (o2info_to_user(*oiff, req)) {
713 status = -EFAULT;
714 goto bail;
715 }
716
717 status = 0;
718bail:
719 if (status)
720 o2info_set_request_error(&oiff->iff_req, req);
721
722 kfree(oiff);
723out_err:
724 return status;
725}
726
727static int ocfs2_info_handle_unknown(struct inode *inode,
728 struct ocfs2_info_request __user *req)
729{
730 int status = -EFAULT;
731 struct ocfs2_info_request oir;
732
733 if (o2info_from_user(oir, req))
734 goto bail;
735
736 o2info_clear_request_filled(&oir);
737
738 if (o2info_to_user(oir, req))
739 goto bail;
740
741 status = 0;
742bail:
743 if (status)
744 o2info_set_request_error(&oir, req);
745
746 return status;
747}
748
749
750
751
752
753
754
755
756static int ocfs2_info_handle_request(struct inode *inode,
757 struct ocfs2_info_request __user *req)
758{
759 int status = -EFAULT;
760 struct ocfs2_info_request oir;
761
762 if (o2info_from_user(oir, req))
763 goto bail;
764
765 status = -EINVAL;
766 if (oir.ir_magic != OCFS2_INFO_MAGIC)
767 goto bail;
768
769 switch (oir.ir_code) {
770 case OCFS2_INFO_BLOCKSIZE:
771 if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
772 status = ocfs2_info_handle_blocksize(inode, req);
773 break;
774 case OCFS2_INFO_CLUSTERSIZE:
775 if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
776 status = ocfs2_info_handle_clustersize(inode, req);
777 break;
778 case OCFS2_INFO_MAXSLOTS:
779 if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
780 status = ocfs2_info_handle_maxslots(inode, req);
781 break;
782 case OCFS2_INFO_LABEL:
783 if (oir.ir_size == sizeof(struct ocfs2_info_label))
784 status = ocfs2_info_handle_label(inode, req);
785 break;
786 case OCFS2_INFO_UUID:
787 if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
788 status = ocfs2_info_handle_uuid(inode, req);
789 break;
790 case OCFS2_INFO_FS_FEATURES:
791 if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
792 status = ocfs2_info_handle_fs_features(inode, req);
793 break;
794 case OCFS2_INFO_JOURNAL_SIZE:
795 if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
796 status = ocfs2_info_handle_journal_size(inode, req);
797 break;
798 case OCFS2_INFO_FREEINODE:
799 if (oir.ir_size == sizeof(struct ocfs2_info_freeinode))
800 status = ocfs2_info_handle_freeinode(inode, req);
801 break;
802 case OCFS2_INFO_FREEFRAG:
803 if (oir.ir_size == sizeof(struct ocfs2_info_freefrag))
804 status = ocfs2_info_handle_freefrag(inode, req);
805 break;
806 default:
807 status = ocfs2_info_handle_unknown(inode, req);
808 break;
809 }
810
811bail:
812 return status;
813}
814
815static int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
816 u64 *req_addr, int compat_flag)
817{
818 int status = -EFAULT;
819 u64 __user *bp = NULL;
820
821 if (compat_flag) {
822#ifdef CONFIG_COMPAT
823
824
825
826
827 bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests);
828#else
829 BUG();
830#endif
831 } else
832 bp = (u64 __user *)(unsigned long)(info->oi_requests);
833
834 if (o2info_from_user(*req_addr, bp + idx))
835 goto bail;
836
837 status = 0;
838bail:
839 return status;
840}
841
842
843
844
845
846
847
848
849
850
851
852
853static int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
854 int compat_flag)
855{
856 int i, status = 0;
857 u64 req_addr;
858 struct ocfs2_info_request __user *reqp;
859
860 if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
861 (!info->oi_requests)) {
862 status = -EINVAL;
863 goto bail;
864 }
865
866 for (i = 0; i < info->oi_count; i++) {
867
868 status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag);
869 if (status)
870 break;
871
872 reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr;
873 if (!reqp) {
874 status = -EINVAL;
875 goto bail;
876 }
877
878 status = ocfs2_info_handle_request(inode, reqp);
879 if (status)
880 break;
881 }
882
883bail:
884 return status;
885}
886
887long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
888{
889 struct inode *inode = file_inode(filp);
890 unsigned int flags;
891 int new_clusters;
892 int status;
893 struct ocfs2_space_resv sr;
894 struct ocfs2_new_group_input input;
895 struct reflink_arguments args;
896 const char __user *old_path;
897 const char __user *new_path;
898 bool preserve;
899 struct ocfs2_info info;
900 void __user *argp = (void __user *)arg;
901
902 switch (cmd) {
903 case OCFS2_IOC_GETFLAGS:
904 status = ocfs2_get_inode_attr(inode, &flags);
905 if (status < 0)
906 return status;
907
908 flags &= OCFS2_FL_VISIBLE;
909 return put_user(flags, (int __user *) arg);
910 case OCFS2_IOC_SETFLAGS:
911 if (get_user(flags, (int __user *) arg))
912 return -EFAULT;
913
914 status = mnt_want_write_file(filp);
915 if (status)
916 return status;
917 status = ocfs2_set_inode_attr(inode, flags,
918 OCFS2_FL_MODIFIABLE);
919 mnt_drop_write_file(filp);
920 return status;
921 case OCFS2_IOC_RESVSP:
922 case OCFS2_IOC_RESVSP64:
923 case OCFS2_IOC_UNRESVSP:
924 case OCFS2_IOC_UNRESVSP64:
925 if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
926 return -EFAULT;
927
928 return ocfs2_change_file_space(filp, cmd, &sr);
929 case OCFS2_IOC_GROUP_EXTEND:
930 if (!capable(CAP_SYS_RESOURCE))
931 return -EPERM;
932
933 if (get_user(new_clusters, (int __user *)arg))
934 return -EFAULT;
935
936 status = mnt_want_write_file(filp);
937 if (status)
938 return status;
939 status = ocfs2_group_extend(inode, new_clusters);
940 mnt_drop_write_file(filp);
941 return status;
942 case OCFS2_IOC_GROUP_ADD:
943 case OCFS2_IOC_GROUP_ADD64:
944 if (!capable(CAP_SYS_RESOURCE))
945 return -EPERM;
946
947 if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
948 return -EFAULT;
949
950 status = mnt_want_write_file(filp);
951 if (status)
952 return status;
953 status = ocfs2_group_add(inode, &input);
954 mnt_drop_write_file(filp);
955 return status;
956 case OCFS2_IOC_REFLINK:
957 if (copy_from_user(&args, argp, sizeof(args)))
958 return -EFAULT;
959 old_path = (const char __user *)(unsigned long)args.old_path;
960 new_path = (const char __user *)(unsigned long)args.new_path;
961 preserve = (args.preserve != 0);
962
963 return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
964 case OCFS2_IOC_INFO:
965 if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
966 return -EFAULT;
967
968 return ocfs2_info_handle(inode, &info, 0);
969 case FITRIM:
970 {
971 struct super_block *sb = inode->i_sb;
972 struct request_queue *q = bdev_get_queue(sb->s_bdev);
973 struct fstrim_range range;
974 int ret = 0;
975
976 if (!capable(CAP_SYS_ADMIN))
977 return -EPERM;
978
979 if (!blk_queue_discard(q))
980 return -EOPNOTSUPP;
981
982 if (copy_from_user(&range, argp, sizeof(range)))
983 return -EFAULT;
984
985 range.minlen = max_t(u64, q->limits.discard_granularity,
986 range.minlen);
987 ret = ocfs2_trim_fs(sb, &range);
988 if (ret < 0)
989 return ret;
990
991 if (copy_to_user(argp, &range, sizeof(range)))
992 return -EFAULT;
993
994 return 0;
995 }
996 case OCFS2_IOC_MOVE_EXT:
997 return ocfs2_ioctl_move_extents(filp, argp);
998 default:
999 return -ENOTTY;
1000 }
1001}
1002
1003#ifdef CONFIG_COMPAT
1004long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
1005{
1006 bool preserve;
1007 struct reflink_arguments args;
1008 struct inode *inode = file_inode(file);
1009 struct ocfs2_info info;
1010 void __user *argp = (void __user *)arg;
1011
1012 switch (cmd) {
1013 case OCFS2_IOC32_GETFLAGS:
1014 cmd = OCFS2_IOC_GETFLAGS;
1015 break;
1016 case OCFS2_IOC32_SETFLAGS:
1017 cmd = OCFS2_IOC_SETFLAGS;
1018 break;
1019 case OCFS2_IOC_RESVSP:
1020 case OCFS2_IOC_RESVSP64:
1021 case OCFS2_IOC_UNRESVSP:
1022 case OCFS2_IOC_UNRESVSP64:
1023 case OCFS2_IOC_GROUP_EXTEND:
1024 case OCFS2_IOC_GROUP_ADD:
1025 case OCFS2_IOC_GROUP_ADD64:
1026 case FITRIM:
1027 break;
1028 case OCFS2_IOC_REFLINK:
1029 if (copy_from_user(&args, argp, sizeof(args)))
1030 return -EFAULT;
1031 preserve = (args.preserve != 0);
1032
1033 return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
1034 compat_ptr(args.new_path), preserve);
1035 case OCFS2_IOC_INFO:
1036 if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
1037 return -EFAULT;
1038
1039 return ocfs2_info_handle(inode, &info, 1);
1040 case OCFS2_IOC_MOVE_EXT:
1041 break;
1042 default:
1043 return -ENOIOCTLCMD;
1044 }
1045
1046 return ocfs2_ioctl(file, cmd, arg);
1047}
1048#endif
1049
