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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#include "sysfile.h"
26#include "dir.h"
27#include "buffer_head_io.h"
28#include "suballoc.h"
29#include "move_extents.h"
30
31#define o2info_from_user(a, b) \
32 copy_from_user(&(a), (b), sizeof(a))
33#define o2info_to_user(a, b) \
34 copy_to_user((typeof(a) __user *)b, &(a), sizeof(a))
35
36
37
38
39
40
41static inline void o2info_set_request_error(struct ocfs2_info_request *kreq,
42 struct ocfs2_info_request __user *req)
43{
44 kreq->ir_flags |= OCFS2_INFO_FL_ERROR;
45 (void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags));
46}
47
48static inline void o2info_set_request_filled(struct ocfs2_info_request *req)
49{
50 req->ir_flags |= OCFS2_INFO_FL_FILLED;
51}
52
53static inline void o2info_clear_request_filled(struct ocfs2_info_request *req)
54{
55 req->ir_flags &= ~OCFS2_INFO_FL_FILLED;
56}
57
58static inline int o2info_coherent(struct ocfs2_info_request *req)
59{
60 return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT));
61}
62
63static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
64{
65 int status;
66
67 status = ocfs2_inode_lock(inode, NULL, 0);
68 if (status < 0) {
69 mlog_errno(status);
70 return status;
71 }
72 ocfs2_get_inode_flags(OCFS2_I(inode));
73 *flags = OCFS2_I(inode)->ip_attr;
74 ocfs2_inode_unlock(inode, 0);
75
76 return status;
77}
78
79static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
80 unsigned mask)
81{
82 struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode);
83 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
84 handle_t *handle = NULL;
85 struct buffer_head *bh = NULL;
86 unsigned oldflags;
87 int status;
88
89 mutex_lock(&inode->i_mutex);
90
91 status = ocfs2_inode_lock(inode, &bh, 1);
92 if (status < 0) {
93 mlog_errno(status);
94 goto bail;
95 }
96
97 status = -EACCES;
98 if (!inode_owner_or_capable(inode))
99 goto bail_unlock;
100
101 if (!S_ISDIR(inode->i_mode))
102 flags &= ~OCFS2_DIRSYNC_FL;
103
104 oldflags = ocfs2_inode->ip_attr;
105 flags = flags & mask;
106 flags |= oldflags & ~mask;
107
108
109
110
111
112 status = -EPERM;
113 if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
114 (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
115 if (!capable(CAP_LINUX_IMMUTABLE))
116 goto bail_unlock;
117 }
118
119 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
120 if (IS_ERR(handle)) {
121 status = PTR_ERR(handle);
122 mlog_errno(status);
123 goto bail_unlock;
124 }
125
126 ocfs2_inode->ip_attr = flags;
127 ocfs2_set_inode_flags(inode);
128
129 status = ocfs2_mark_inode_dirty(handle, inode, bh);
130 if (status < 0)
131 mlog_errno(status);
132
133 ocfs2_commit_trans(osb, handle);
134
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.ib_req);
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.ib_req, 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.ic_req);
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.ic_req, 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.im_req);
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.im_req, 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.il_req);
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.il_req, 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.iu_req);
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.iu_req, 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.if_req);
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.if_req, 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.ij_req);
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.ij_req, req);
317
318 return status;
319}
320
321int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb,
322 struct inode *inode_alloc, u64 blkno,
323 struct ocfs2_info_freeinode *fi, u32 slot)
324{
325 int status = 0, unlock = 0;
326
327 struct buffer_head *bh = NULL;
328 struct ocfs2_dinode *dinode_alloc = NULL;
329
330 if (inode_alloc)
331 mutex_lock(&inode_alloc->i_mutex);
332
333 if (o2info_coherent(&fi->ifi_req)) {
334 status = ocfs2_inode_lock(inode_alloc, &bh, 0);
335 if (status < 0) {
336 mlog_errno(status);
337 goto bail;
338 }
339 unlock = 1;
340 } else {
341 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
342 if (status < 0) {
343 mlog_errno(status);
344 goto bail;
345 }
346 }
347
348 dinode_alloc = (struct ocfs2_dinode *)bh->b_data;
349
350 fi->ifi_stat[slot].lfi_total =
351 le32_to_cpu(dinode_alloc->id1.bitmap1.i_total);
352 fi->ifi_stat[slot].lfi_free =
353 le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) -
354 le32_to_cpu(dinode_alloc->id1.bitmap1.i_used);
355
356bail:
357 if (unlock)
358 ocfs2_inode_unlock(inode_alloc, 0);
359
360 if (inode_alloc)
361 mutex_unlock(&inode_alloc->i_mutex);
362
363 brelse(bh);
364
365 return status;
366}
367
368int ocfs2_info_handle_freeinode(struct inode *inode,
369 struct ocfs2_info_request __user *req)
370{
371 u32 i;
372 u64 blkno = -1;
373 char namebuf[40];
374 int status = -EFAULT, type = INODE_ALLOC_SYSTEM_INODE;
375 struct ocfs2_info_freeinode *oifi = NULL;
376 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
377 struct inode *inode_alloc = NULL;
378
379 oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL);
380 if (!oifi) {
381 status = -ENOMEM;
382 mlog_errno(status);
383 goto out_err;
384 }
385
386 if (o2info_from_user(*oifi, req))
387 goto bail;
388
389 oifi->ifi_slotnum = osb->max_slots;
390
391 for (i = 0; i < oifi->ifi_slotnum; i++) {
392 if (o2info_coherent(&oifi->ifi_req)) {
393 inode_alloc = ocfs2_get_system_file_inode(osb, type, i);
394 if (!inode_alloc) {
395 mlog(ML_ERROR, "unable to get alloc inode in "
396 "slot %u\n", i);
397 status = -EIO;
398 goto bail;
399 }
400 } else {
401 ocfs2_sprintf_system_inode_name(namebuf,
402 sizeof(namebuf),
403 type, i);
404 status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
405 namebuf,
406 strlen(namebuf),
407 &blkno);
408 if (status < 0) {
409 status = -ENOENT;
410 goto bail;
411 }
412 }
413
414 status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i);
415 if (status < 0)
416 goto bail;
417
418 iput(inode_alloc);
419 inode_alloc = NULL;
420 }
421
422 o2info_set_request_filled(&oifi->ifi_req);
423
424 if (o2info_to_user(*oifi, req))
425 goto bail;
426
427 status = 0;
428bail:
429 if (status)
430 o2info_set_request_error(&oifi->ifi_req, req);
431
432 kfree(oifi);
433out_err:
434 return status;
435}
436
437static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist,
438 unsigned int chunksize)
439{
440 int index;
441
442 index = __ilog2_u32(chunksize);
443 if (index >= OCFS2_INFO_MAX_HIST)
444 index = OCFS2_INFO_MAX_HIST - 1;
445
446 hist->fc_chunks[index]++;
447 hist->fc_clusters[index] += chunksize;
448}
449
450static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats,
451 unsigned int chunksize)
452{
453 if (chunksize > stats->ffs_max)
454 stats->ffs_max = chunksize;
455
456 if (chunksize < stats->ffs_min)
457 stats->ffs_min = chunksize;
458
459 stats->ffs_avg += chunksize;
460 stats->ffs_free_chunks_real++;
461}
462
463void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg,
464 unsigned int chunksize)
465{
466 o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize);
467 o2ffg_update_stats(&(ffg->iff_ffs), chunksize);
468}
469
470int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb,
471 struct inode *gb_inode,
472 struct ocfs2_dinode *gb_dinode,
473 struct ocfs2_chain_rec *rec,
474 struct ocfs2_info_freefrag *ffg,
475 u32 chunks_in_group)
476{
477 int status = 0, used;
478 u64 blkno;
479
480 struct buffer_head *bh = NULL;
481 struct ocfs2_group_desc *bg = NULL;
482
483 unsigned int max_bits, num_clusters;
484 unsigned int offset = 0, cluster, chunk;
485 unsigned int chunk_free, last_chunksize = 0;
486
487 if (!le32_to_cpu(rec->c_free))
488 goto bail;
489
490 do {
491 if (!bg)
492 blkno = le64_to_cpu(rec->c_blkno);
493 else
494 blkno = le64_to_cpu(bg->bg_next_group);
495
496 if (bh) {
497 brelse(bh);
498 bh = NULL;
499 }
500
501 if (o2info_coherent(&ffg->iff_req))
502 status = ocfs2_read_group_descriptor(gb_inode,
503 gb_dinode,
504 blkno, &bh);
505 else
506 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
507
508 if (status < 0) {
509 mlog(ML_ERROR, "Can't read the group descriptor # "
510 "%llu from device.", (unsigned long long)blkno);
511 status = -EIO;
512 goto bail;
513 }
514
515 bg = (struct ocfs2_group_desc *)bh->b_data;
516
517 if (!le16_to_cpu(bg->bg_free_bits_count))
518 continue;
519
520 max_bits = le16_to_cpu(bg->bg_bits);
521 offset = 0;
522
523 for (chunk = 0; chunk < chunks_in_group; chunk++) {
524
525
526
527 if ((offset + ffg->iff_chunksize) > max_bits)
528 num_clusters = max_bits - offset;
529 else
530 num_clusters = ffg->iff_chunksize;
531
532 chunk_free = 0;
533 for (cluster = 0; cluster < num_clusters; cluster++) {
534 used = ocfs2_test_bit(offset,
535 (unsigned long *)bg->bg_bitmap);
536
537
538
539
540
541 if (!used) {
542 last_chunksize++;
543 chunk_free++;
544 }
545
546 if (used && last_chunksize) {
547 ocfs2_info_update_ffg(ffg,
548 last_chunksize);
549 last_chunksize = 0;
550 }
551
552 offset++;
553 }
554
555 if (chunk_free == ffg->iff_chunksize)
556 ffg->iff_ffs.ffs_free_chunks++;
557 }
558
559
560
561
562 if (last_chunksize)
563 ocfs2_info_update_ffg(ffg, last_chunksize);
564
565 } while (le64_to_cpu(bg->bg_next_group));
566
567bail:
568 brelse(bh);
569
570 return status;
571}
572
573int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb,
574 struct inode *gb_inode, u64 blkno,
575 struct ocfs2_info_freefrag *ffg)
576{
577 u32 chunks_in_group;
578 int status = 0, unlock = 0, i;
579
580 struct buffer_head *bh = NULL;
581 struct ocfs2_chain_list *cl = NULL;
582 struct ocfs2_chain_rec *rec = NULL;
583 struct ocfs2_dinode *gb_dinode = NULL;
584
585 if (gb_inode)
586 mutex_lock(&gb_inode->i_mutex);
587
588 if (o2info_coherent(&ffg->iff_req)) {
589 status = ocfs2_inode_lock(gb_inode, &bh, 0);
590 if (status < 0) {
591 mlog_errno(status);
592 goto bail;
593 }
594 unlock = 1;
595 } else {
596 status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh);
597 if (status < 0) {
598 mlog_errno(status);
599 goto bail;
600 }
601 }
602
603 gb_dinode = (struct ocfs2_dinode *)bh->b_data;
604 cl = &(gb_dinode->id2.i_chain);
605
606
607
608
609
610 if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) {
611 status = -EINVAL;
612 goto bail;
613 }
614
615 memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats));
616
617 ffg->iff_ffs.ffs_min = ~0U;
618 ffg->iff_ffs.ffs_clusters =
619 le32_to_cpu(gb_dinode->id1.bitmap1.i_total);
620 ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters -
621 le32_to_cpu(gb_dinode->id1.bitmap1.i_used);
622
623 chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1;
624
625 for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) {
626 rec = &(cl->cl_recs[i]);
627 status = ocfs2_info_freefrag_scan_chain(osb, gb_inode,
628 gb_dinode,
629 rec, ffg,
630 chunks_in_group);
631 if (status)
632 goto bail;
633 }
634
635 if (ffg->iff_ffs.ffs_free_chunks_real)
636 ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg /
637 ffg->iff_ffs.ffs_free_chunks_real);
638bail:
639 if (unlock)
640 ocfs2_inode_unlock(gb_inode, 0);
641
642 if (gb_inode)
643 mutex_unlock(&gb_inode->i_mutex);
644
645 if (gb_inode)
646 iput(gb_inode);
647
648 brelse(bh);
649
650 return status;
651}
652
653int ocfs2_info_handle_freefrag(struct inode *inode,
654 struct ocfs2_info_request __user *req)
655{
656 u64 blkno = -1;
657 char namebuf[40];
658 int status = -EFAULT, type = GLOBAL_BITMAP_SYSTEM_INODE;
659
660 struct ocfs2_info_freefrag *oiff;
661 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
662 struct inode *gb_inode = NULL;
663
664 oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL);
665 if (!oiff) {
666 status = -ENOMEM;
667 mlog_errno(status);
668 goto out_err;
669 }
670
671 if (o2info_from_user(*oiff, req))
672 goto bail;
673
674
675
676 if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) ||
677 (!oiff->iff_chunksize)) {
678 status = -EINVAL;
679 goto bail;
680 }
681
682 if (o2info_coherent(&oiff->iff_req)) {
683 gb_inode = ocfs2_get_system_file_inode(osb, type,
684 OCFS2_INVALID_SLOT);
685 if (!gb_inode) {
686 mlog(ML_ERROR, "unable to get global_bitmap inode\n");
687 status = -EIO;
688 goto bail;
689 }
690 } else {
691 ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type,
692 OCFS2_INVALID_SLOT);
693 status = ocfs2_lookup_ino_from_name(osb->sys_root_inode,
694 namebuf,
695 strlen(namebuf),
696 &blkno);
697 if (status < 0) {
698 status = -ENOENT;
699 goto bail;
700 }
701 }
702
703 status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff);
704 if (status < 0)
705 goto bail;
706
707 o2info_set_request_filled(&oiff->iff_req);
708
709 if (o2info_to_user(*oiff, req)) {
710 status = -EFAULT;
711 goto bail;
712 }
713
714 status = 0;
715bail:
716 if (status)
717 o2info_set_request_error(&oiff->iff_req, req);
718
719 kfree(oiff);
720out_err:
721 return status;
722}
723
724int ocfs2_info_handle_unknown(struct inode *inode,
725 struct ocfs2_info_request __user *req)
726{
727 int status = -EFAULT;
728 struct ocfs2_info_request oir;
729
730 if (o2info_from_user(oir, req))
731 goto bail;
732
733 o2info_clear_request_filled(&oir);
734
735 if (o2info_to_user(oir, req))
736 goto bail;
737
738 status = 0;
739bail:
740 if (status)
741 o2info_set_request_error(&oir, req);
742
743 return status;
744}
745
746
747
748
749
750
751
752
753int ocfs2_info_handle_request(struct inode *inode,
754 struct ocfs2_info_request __user *req)
755{
756 int status = -EFAULT;
757 struct ocfs2_info_request oir;
758
759 if (o2info_from_user(oir, req))
760 goto bail;
761
762 status = -EINVAL;
763 if (oir.ir_magic != OCFS2_INFO_MAGIC)
764 goto bail;
765
766 switch (oir.ir_code) {
767 case OCFS2_INFO_BLOCKSIZE:
768 if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
769 status = ocfs2_info_handle_blocksize(inode, req);
770 break;
771 case OCFS2_INFO_CLUSTERSIZE:
772 if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
773 status = ocfs2_info_handle_clustersize(inode, req);
774 break;
775 case OCFS2_INFO_MAXSLOTS:
776 if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
777 status = ocfs2_info_handle_maxslots(inode, req);
778 break;
779 case OCFS2_INFO_LABEL:
780 if (oir.ir_size == sizeof(struct ocfs2_info_label))
781 status = ocfs2_info_handle_label(inode, req);
782 break;
783 case OCFS2_INFO_UUID:
784 if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
785 status = ocfs2_info_handle_uuid(inode, req);
786 break;
787 case OCFS2_INFO_FS_FEATURES:
788 if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
789 status = ocfs2_info_handle_fs_features(inode, req);
790 break;
791 case OCFS2_INFO_JOURNAL_SIZE:
792 if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
793 status = ocfs2_info_handle_journal_size(inode, req);
794 break;
795 case OCFS2_INFO_FREEINODE:
796 if (oir.ir_size == sizeof(struct ocfs2_info_freeinode))
797 status = ocfs2_info_handle_freeinode(inode, req);
798 break;
799 case OCFS2_INFO_FREEFRAG:
800 if (oir.ir_size == sizeof(struct ocfs2_info_freefrag))
801 status = ocfs2_info_handle_freefrag(inode, req);
802 break;
803 default:
804 status = ocfs2_info_handle_unknown(inode, req);
805 break;
806 }
807
808bail:
809 return status;
810}
811
812int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
813 u64 *req_addr, int compat_flag)
814{
815 int status = -EFAULT;
816 u64 __user *bp = NULL;
817
818 if (compat_flag) {
819#ifdef CONFIG_COMPAT
820
821
822
823
824 bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests);
825#else
826 BUG();
827#endif
828 } else
829 bp = (u64 __user *)(unsigned long)(info->oi_requests);
830
831 if (o2info_from_user(*req_addr, bp + idx))
832 goto bail;
833
834 status = 0;
835bail:
836 return status;
837}
838
839
840
841
842
843
844
845
846
847
848
849
850int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
851 int compat_flag)
852{
853 int i, status = 0;
854 u64 req_addr;
855 struct ocfs2_info_request __user *reqp;
856
857 if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
858 (!info->oi_requests)) {
859 status = -EINVAL;
860 goto bail;
861 }
862
863 for (i = 0; i < info->oi_count; i++) {
864
865 status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag);
866 if (status)
867 break;
868
869 reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr;
870 if (!reqp) {
871 status = -EINVAL;
872 goto bail;
873 }
874
875 status = ocfs2_info_handle_request(inode, reqp);
876 if (status)
877 break;
878 }
879
880bail:
881 return status;
882}
883
884long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
885{
886 struct inode *inode = file_inode(filp);
887 unsigned int flags;
888 int new_clusters;
889 int status;
890 struct ocfs2_space_resv sr;
891 struct ocfs2_new_group_input input;
892 struct reflink_arguments args;
893 const char __user *old_path;
894 const char __user *new_path;
895 bool preserve;
896 struct ocfs2_info info;
897 void __user *argp = (void __user *)arg;
898
899 switch (cmd) {
900 case OCFS2_IOC_GETFLAGS:
901 status = ocfs2_get_inode_attr(inode, &flags);
902 if (status < 0)
903 return status;
904
905 flags &= OCFS2_FL_VISIBLE;
906 return put_user(flags, (int __user *) arg);
907 case OCFS2_IOC_SETFLAGS:
908 if (get_user(flags, (int __user *) arg))
909 return -EFAULT;
910
911 status = mnt_want_write_file(filp);
912 if (status)
913 return status;
914 status = ocfs2_set_inode_attr(inode, flags,
915 OCFS2_FL_MODIFIABLE);
916 mnt_drop_write_file(filp);
917 return status;
918 case OCFS2_IOC_RESVSP:
919 case OCFS2_IOC_RESVSP64:
920 case OCFS2_IOC_UNRESVSP:
921 case OCFS2_IOC_UNRESVSP64:
922 if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
923 return -EFAULT;
924
925 return ocfs2_change_file_space(filp, cmd, &sr);
926 case OCFS2_IOC_GROUP_EXTEND:
927 if (!capable(CAP_SYS_RESOURCE))
928 return -EPERM;
929
930 if (get_user(new_clusters, (int __user *)arg))
931 return -EFAULT;
932
933 status = mnt_want_write_file(filp);
934 if (status)
935 return status;
936 status = ocfs2_group_extend(inode, new_clusters);
937 mnt_drop_write_file(filp);
938 return status;
939 case OCFS2_IOC_GROUP_ADD:
940 case OCFS2_IOC_GROUP_ADD64:
941 if (!capable(CAP_SYS_RESOURCE))
942 return -EPERM;
943
944 if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
945 return -EFAULT;
946
947 status = mnt_want_write_file(filp);
948 if (status)
949 return status;
950 status = ocfs2_group_add(inode, &input);
951 mnt_drop_write_file(filp);
952 return status;
953 case OCFS2_IOC_REFLINK:
954 if (copy_from_user(&args, argp, sizeof(args)))
955 return -EFAULT;
956 old_path = (const char __user *)(unsigned long)args.old_path;
957 new_path = (const char __user *)(unsigned long)args.new_path;
958 preserve = (args.preserve != 0);
959
960 return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
961 case OCFS2_IOC_INFO:
962 if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
963 return -EFAULT;
964
965 return ocfs2_info_handle(inode, &info, 0);
966 case FITRIM:
967 {
968 struct super_block *sb = inode->i_sb;
969 struct fstrim_range range;
970 int ret = 0;
971
972 if (!capable(CAP_SYS_ADMIN))
973 return -EPERM;
974
975 if (copy_from_user(&range, argp, sizeof(range)))
976 return -EFAULT;
977
978 ret = ocfs2_trim_fs(sb, &range);
979 if (ret < 0)
980 return ret;
981
982 if (copy_to_user(argp, &range, sizeof(range)))
983 return -EFAULT;
984
985 return 0;
986 }
987 case OCFS2_IOC_MOVE_EXT:
988 return ocfs2_ioctl_move_extents(filp, argp);
989 default:
990 return -ENOTTY;
991 }
992}
993
994#ifdef CONFIG_COMPAT
995long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
996{
997 bool preserve;
998 struct reflink_arguments args;
999 struct inode *inode = file_inode(file);
1000 struct ocfs2_info info;
1001 void __user *argp = (void __user *)arg;
1002
1003 switch (cmd) {
1004 case OCFS2_IOC32_GETFLAGS:
1005 cmd = OCFS2_IOC_GETFLAGS;
1006 break;
1007 case OCFS2_IOC32_SETFLAGS:
1008 cmd = OCFS2_IOC_SETFLAGS;
1009 break;
1010 case OCFS2_IOC_RESVSP:
1011 case OCFS2_IOC_RESVSP64:
1012 case OCFS2_IOC_UNRESVSP:
1013 case OCFS2_IOC_UNRESVSP64:
1014 case OCFS2_IOC_GROUP_EXTEND:
1015 case OCFS2_IOC_GROUP_ADD:
1016 case OCFS2_IOC_GROUP_ADD64:
1017 case FITRIM:
1018 break;
1019 case OCFS2_IOC_REFLINK:
1020 if (copy_from_user(&args, argp, sizeof(args)))
1021 return -EFAULT;
1022 preserve = (args.preserve != 0);
1023
1024 return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
1025 compat_ptr(args.new_path), preserve);
1026 case OCFS2_IOC_INFO:
1027 if (copy_from_user(&info, argp, sizeof(struct ocfs2_info)))
1028 return -EFAULT;
1029
1030 return ocfs2_info_handle(inode, &info, 1);
1031 case OCFS2_IOC_MOVE_EXT:
1032 break;
1033 default:
1034 return -ENOIOCTLCMD;
1035 }
1036
1037 return ocfs2_ioctl(file, cmd, arg);
1038}
1039#endif
1040
