projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
get rid of pointless includes of ext2_fs.h
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / fs / ocfs2 / ioctl.c
CommitLineData
ca4d147e
HP		 1/*
2 * linux/fs/ocfs2/ioctl.c
3 *
4 * Copyright (C) 2006 Herbert Poetzl
5 * adapted from Remy Card's ext2/ioctl.c
6 */
7
8#include <linux/fs.h>
9#include <linux/mount.h>
34e6c59a 10#include <linux/compat.h>
ca4d147e 11
ca4d147e
HP		 12#include <cluster/masklog.h>
13
14#include "ocfs2.h"
15#include "alloc.h"
16#include "dlmglue.h"
b2580103 17#include "file.h"
ca4d147e
HP		 18#include "inode.h"
19#include "journal.h"
20
21#include "ocfs2_fs.h"
2d562518 22#include "ioctl.h"
d659072f 23#include "resize.h"
bd50873d 24#include "refcounttree.h"
3e5db17d
TY		 25#include "sysfile.h"
26#include "dir.h"
27#include "buffer_head_io.h"
d24a10b9 28#include "suballoc.h"
53069d4e 29#include "move_extents.h"
2d562518 30
ddee5cdb
TY		 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 * This call is void because we are already reporting an error that may
38 * be -EFAULT. The error will be returned from the ioctl(2) call. It's
39 * just a best-effort to tell userspace that this request caused the error.
40 */
8aa1fa36 41static inline void o2info_set_request_error(struct ocfs2_info_request *kreq,
ddee5cdb
TY		 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
8aa1fa36 48static inline void o2info_set_request_filled(struct ocfs2_info_request *req)
1936a267
TY		 49{
50 req->ir_flags |= OCFS2_INFO_FL_FILLED;
51}
52
8aa1fa36 53static inline void o2info_clear_request_filled(struct ocfs2_info_request *req)
1936a267
TY		 54{
55 req->ir_flags &= ~OCFS2_INFO_FL_FILLED;
56}
57
3e5db17d
TY		 58static inline int o2info_coherent(struct ocfs2_info_request *req)
59{
60 return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT));
61}
1936a267 62
ca4d147e
HP		 63static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags)
64{
65 int status;
66
e63aecb6 67 status = ocfs2_inode_lock(inode, NULL, 0);
ca4d147e
HP		 68 if (status < 0) {
69 mlog_errno(status);
70 return status;
71 }
6e4b0d56 72 ocfs2_get_inode_flags(OCFS2_I(inode));
ca4d147e 73 *flags = OCFS2_I(inode)->ip_attr;
e63aecb6 74 ocfs2_inode_unlock(inode, 0);
ca4d147e 75
ca4d147e
HP		 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);
1fabe148 84 handle_t *handle = NULL;
ca4d147e
HP		 85 struct buffer_head *bh = NULL;
86 unsigned oldflags;
87 int status;
88
89 mutex_lock(&inode->i_mutex);
90
e63aecb6 91 status = ocfs2_inode_lock(inode, &bh, 1);
ca4d147e
HP		 92 if (status < 0) {
93 mlog_errno(status);
94 goto bail;
95 }
96
ca4d147e 97 status = -EACCES;
2e149670 98 if (!inode_owner_or_capable(inode))
ca4d147e
HP		 99 goto bail_unlock;
100
101 if (!S_ISDIR(inode->i_mode))
102 flags &= ~OCFS2_DIRSYNC_FL;
103
65eff9cc 104 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
ca4d147e
HP		 105 if (IS_ERR(handle)) {
106 status = PTR_ERR(handle);
107 mlog_errno(status);
108 goto bail_unlock;
109 }
110
111 oldflags = ocfs2_inode->ip_attr;
112 flags = flags & mask;
113 flags |= oldflags & ~mask;
114
115 /*
116 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
117 * the relevant capability.
118 */
119 status = -EPERM;
120 if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
121 (OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
122 if (!capable(CAP_LINUX_IMMUTABLE))
b8a0ae57 123 goto bail_commit;
ca4d147e
HP		 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
b8a0ae57 133bail_commit:
02dc1af4 134 ocfs2_commit_trans(osb, handle);
ca4d147e 135bail_unlock:
e63aecb6 136 ocfs2_inode_unlock(inode, 1);
ca4d147e
HP		 137bail:
138 mutex_unlock(&inode->i_mutex);
139
a81cb88b 140 brelse(bh);
ca4d147e 141
ca4d147e
HP		 142 return status;
143}
144
ddee5cdb
TY		 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;
1936a267 155
8aa1fa36 156 o2info_set_request_filled(&oib.ib_req);
ddee5cdb
TY		 157
158 if (o2info_to_user(oib, req))
159 goto bail;
160
161 status = 0;
162bail:
163 if (status)
8aa1fa36 164 o2info_set_request_error(&oib.ib_req, req);
ddee5cdb
TY		 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;
1936a267 180
8aa1fa36 181 o2info_set_request_filled(&oic.ic_req);
ddee5cdb
TY		 182
183 if (o2info_to_user(oic, req))
184 goto bail;
185
186 status = 0;
187bail:
188 if (status)
8aa1fa36 189 o2info_set_request_error(&oic.ic_req, req);
ddee5cdb
TY		 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;
1936a267 205
8aa1fa36 206 o2info_set_request_filled(&oim.im_req);
ddee5cdb
TY		 207
208 if (o2info_to_user(oim, req))
209 goto bail;
210
211 status = 0;
212bail:
213 if (status)
8aa1fa36 214 o2info_set_request_error(&oim.im_req, req);
ddee5cdb
TY		 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);
1936a267 230
8aa1fa36 231 o2info_set_request_filled(&oil.il_req);
ddee5cdb
TY		 232
233 if (o2info_to_user(oil, req))
234 goto bail;
235
236 status = 0;
237bail:
238 if (status)
8aa1fa36 239 o2info_set_request_error(&oil.il_req, req);
ddee5cdb
TY		 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);
1936a267 255
8aa1fa36 256 o2info_set_request_filled(&oiu.iu_req);
ddee5cdb
TY		 257
258 if (o2info_to_user(oiu, req))
259 goto bail;
260
261 status = 0;
262bail:
263 if (status)
8aa1fa36 264 o2info_set_request_error(&oiu.iu_req, req);
ddee5cdb
TY		 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;
1936a267 282
8aa1fa36 283 o2info_set_request_filled(&oif.if_req);
ddee5cdb
TY		 284
285 if (o2info_to_user(oif, req))
286 goto bail;
287
288 status = 0;
289bail:
290 if (status)
8aa1fa36 291 o2info_set_request_error(&oif.if_req, req);
ddee5cdb
TY		 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
8aa1fa36 308 o2info_set_request_filled(&oij.ij_req);
ddee5cdb
TY		 309
310 if (o2info_to_user(oij, req))
311 goto bail;
312
313 status = 0;
314bail:
315 if (status)
8aa1fa36 316 o2info_set_request_error(&oij.ij_req, req);
ddee5cdb
TY		 317
318 return status;
319}
320
3e5db17d
TY		 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);
87f0d5c8 383 goto out_err;
3e5db17d
TY		 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);
87f0d5c8 433out_err:
3e5db17d
TY		 434 return status;
435}
436
d24a10b9
TY		 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 * last chunk may be not an entire one.
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 * - chunk_free counts free clusters in #N chunk.
538 * - last_chunksize records the size(in) clusters
539 * for the last real free chunk being counted.
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 * need to update the info for last free chunk.
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 * Chunksize(in) clusters from userspace should be
608 * less than clusters in a group.
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);
87f0d5c8 668 goto out_err;
d24a10b9
TY		 669 }
670
671 if (o2info_from_user(*oiff, req))
672 goto bail;
673 /*
674 * chunksize from userspace should be power of 2.
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 goto bail;
711
712 status = 0;
713bail:
714 if (status)
715 o2info_set_request_error(&oiff->iff_req, req);
716
717 kfree(oiff);
87f0d5c8 718out_err:
ddee5cdb
TY		 719 return status;
720}
721
722int ocfs2_info_handle_unknown(struct inode *inode,
723 struct ocfs2_info_request __user *req)
724{
725 int status = -EFAULT;
726 struct ocfs2_info_request oir;
727
728 if (o2info_from_user(oir, req))
729 goto bail;
730
8aa1fa36 731 o2info_clear_request_filled(&oir);
ddee5cdb
TY		 732
733 if (o2info_to_user(oir, req))
734 goto bail;
735
736 status = 0;
737bail:
738 if (status)
8aa1fa36 739 o2info_set_request_error(&oir, req);
ddee5cdb
TY		 740
741 return status;
742}
743
744/*
745 * Validate and distinguish OCFS2_IOC_INFO requests.
746 *
747 * - validate the magic number.
748 * - distinguish different requests.
749 * - validate size of different requests.
750 */
751int ocfs2_info_handle_request(struct inode *inode,
752 struct ocfs2_info_request __user *req)
753{
754 int status = -EFAULT;
755 struct ocfs2_info_request oir;
756
757 if (o2info_from_user(oir, req))
758 goto bail;
759
760 status = -EINVAL;
761 if (oir.ir_magic != OCFS2_INFO_MAGIC)
762 goto bail;
763
764 switch (oir.ir_code) {
765 case OCFS2_INFO_BLOCKSIZE:
766 if (oir.ir_size == sizeof(struct ocfs2_info_blocksize))
767 status = ocfs2_info_handle_blocksize(inode, req);
768 break;
769 case OCFS2_INFO_CLUSTERSIZE:
770 if (oir.ir_size == sizeof(struct ocfs2_info_clustersize))
771 status = ocfs2_info_handle_clustersize(inode, req);
772 break;
773 case OCFS2_INFO_MAXSLOTS:
774 if (oir.ir_size == sizeof(struct ocfs2_info_maxslots))
775 status = ocfs2_info_handle_maxslots(inode, req);
776 break;
777 case OCFS2_INFO_LABEL:
778 if (oir.ir_size == sizeof(struct ocfs2_info_label))
779 status = ocfs2_info_handle_label(inode, req);
780 break;
781 case OCFS2_INFO_UUID:
782 if (oir.ir_size == sizeof(struct ocfs2_info_uuid))
783 status = ocfs2_info_handle_uuid(inode, req);
784 break;
785 case OCFS2_INFO_FS_FEATURES:
786 if (oir.ir_size == sizeof(struct ocfs2_info_fs_features))
787 status = ocfs2_info_handle_fs_features(inode, req);
788 break;
789 case OCFS2_INFO_JOURNAL_SIZE:
790 if (oir.ir_size == sizeof(struct ocfs2_info_journal_size))
791 status = ocfs2_info_handle_journal_size(inode, req);
792 break;
3e5db17d
TY		 793 case OCFS2_INFO_FREEINODE:
794 if (oir.ir_size == sizeof(struct ocfs2_info_freeinode))
795 status = ocfs2_info_handle_freeinode(inode, req);
796 break;
d24a10b9
TY		 797 case OCFS2_INFO_FREEFRAG:
798 if (oir.ir_size == sizeof(struct ocfs2_info_freefrag))
799 status = ocfs2_info_handle_freefrag(inode, req);
800 break;
ddee5cdb
TY		 801 default:
802 status = ocfs2_info_handle_unknown(inode, req);
803 break;
804 }
805
806bail:
807 return status;
808}
809
810int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx,
811 u64 *req_addr, int compat_flag)
812{
813 int status = -EFAULT;
814 u64 __user *bp = NULL;
815
816 if (compat_flag) {
817#ifdef CONFIG_COMPAT
818 /*
819 * pointer bp stores the base address of a pointers array,
820 * which collects all addresses of separate request.
821 */
822 bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests);
823#else
824 BUG();
825#endif
826 } else
827 bp = (u64 __user *)(unsigned long)(info->oi_requests);
828
829 if (o2info_from_user(*req_addr, bp + idx))
830 goto bail;
831
832 status = 0;
833bail:
834 return status;
835}
836
837/*
838 * OCFS2_IOC_INFO handles an array of requests passed from userspace.
839 *
840 * ocfs2_info_handle() recevies a large info aggregation, grab and
841 * validate the request count from header, then break it into small
842 * pieces, later specific handlers can handle them one by one.
843 *
844 * Idea here is to make each separate request small enough to ensure
845 * a better backward&forward compatibility, since a small piece of
846 * request will be less likely to be broken if disk layout get changed.
847 */
848int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info,
849 int compat_flag)
850{
851 int i, status = 0;
852 u64 req_addr;
853 struct ocfs2_info_request __user *reqp;
854
855 if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) ||
856 (!info->oi_requests)) {
857 status = -EINVAL;
858 goto bail;
859 }
860
861 for (i = 0; i < info->oi_count; i++) {
862
863 status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag);
864 if (status)
865 break;
866
867 reqp = (struct ocfs2_info_request *)(unsigned long)req_addr;
868 if (!reqp) {
869 status = -EINVAL;
870 goto bail;
871 }
872
873 status = ocfs2_info_handle_request(inode, reqp);
874 if (status)
875 break;
876 }
877
878bail:
879 return status;
880}
881
c9ec1488 882long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
ca4d147e 883{
c9ec1488 884 struct inode *inode = filp->f_path.dentry->d_inode;
ca4d147e 885 unsigned int flags;
d659072f 886 int new_clusters;
ca4d147e 887 int status;
b2580103 888 struct ocfs2_space_resv sr;
7909f2bf 889 struct ocfs2_new_group_input input;
bd50873d
TM		 890 struct reflink_arguments args;
891 const char *old_path, *new_path;
892 bool preserve;
ddee5cdb 893 struct ocfs2_info info;
ca4d147e
HP		 894
895 switch (cmd) {
896 case OCFS2_IOC_GETFLAGS:
897 status = ocfs2_get_inode_attr(inode, &flags);
898 if (status < 0)
899 return status;
900
901 flags &= OCFS2_FL_VISIBLE;
902 return put_user(flags, (int __user *) arg);
903 case OCFS2_IOC_SETFLAGS:
904 if (get_user(flags, (int __user *) arg))
905 return -EFAULT;
906
a561be71 907 status = mnt_want_write_file(filp);
42a74f20
DH		 908 if (status)
909 return status;
910 status = ocfs2_set_inode_attr(inode, flags,
ca4d147e 911 OCFS2_FL_MODIFIABLE);
2a79f17e 912 mnt_drop_write_file(filp);
42a74f20 913 return status;
b2580103
MF		 914 case OCFS2_IOC_RESVSP:
915 case OCFS2_IOC_RESVSP64:
916 case OCFS2_IOC_UNRESVSP:
917 case OCFS2_IOC_UNRESVSP64:
918 if (copy_from_user(&sr, (int __user *) arg, sizeof(sr)))
919 return -EFAULT;
920
921 return ocfs2_change_file_space(filp, cmd, &sr);
d659072f 922 case OCFS2_IOC_GROUP_EXTEND:
0957f007
MF		 923 if (!capable(CAP_SYS_RESOURCE))
924 return -EPERM;
925
d659072f
TM		 926 if (get_user(new_clusters, (int __user *)arg))
927 return -EFAULT;
928
929 return ocfs2_group_extend(inode, new_clusters);
7909f2bf
TM		 930 case OCFS2_IOC_GROUP_ADD:
931 case OCFS2_IOC_GROUP_ADD64:
0957f007
MF		 932 if (!capable(CAP_SYS_RESOURCE))
933 return -EPERM;
934
7909f2bf
TM		 935 if (copy_from_user(&input, (int __user *) arg, sizeof(input)))
936 return -EFAULT;
937
938 return ocfs2_group_add(inode, &input);
bd50873d
TM		 939 case OCFS2_IOC_REFLINK:
940 if (copy_from_user(&args, (struct reflink_arguments *)arg,
941 sizeof(args)))
942 return -EFAULT;
943 old_path = (const char *)(unsigned long)args.old_path;
944 new_path = (const char *)(unsigned long)args.new_path;
945 preserve = (args.preserve != 0);
946
947 return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve);
ddee5cdb
TY		 948 case OCFS2_IOC_INFO:
949 if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
950 sizeof(struct ocfs2_info)))
951 return -EFAULT;
952
953 return ocfs2_info_handle(inode, &info, 0);
55e67872
TM		 954 case FITRIM:
955 {
956 struct super_block *sb = inode->i_sb;
957 struct fstrim_range range;
958 int ret = 0;
959
960 if (!capable(CAP_SYS_ADMIN))
961 return -EPERM;
962
963 if (copy_from_user(&range, (struct fstrim_range *)arg,
964 sizeof(range)))
965 return -EFAULT;
966
967 ret = ocfs2_trim_fs(sb, &range);
968 if (ret < 0)
969 return ret;
970
971 if (copy_to_user((struct fstrim_range *)arg, &range,
972 sizeof(range)))
973 return -EFAULT;
974
975 return 0;
976 }
53069d4e
TY		 977 case OCFS2_IOC_MOVE_EXT:
978 return ocfs2_ioctl_move_extents(filp, (void __user *)arg);
ca4d147e
HP		 979 default:
980 return -ENOTTY;
981 }
982}
983
586d232b
MF		 984#ifdef CONFIG_COMPAT
985long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg)
986{
34e6c59a
TM		 987 bool preserve;
988 struct reflink_arguments args;
989 struct inode *inode = file->f_path.dentry->d_inode;
ddee5cdb 990 struct ocfs2_info info;
34e6c59a 991
586d232b
MF		 992 switch (cmd) {
993 case OCFS2_IOC32_GETFLAGS:
994 cmd = OCFS2_IOC_GETFLAGS;
995 break;
996 case OCFS2_IOC32_SETFLAGS:
997 cmd = OCFS2_IOC_SETFLAGS;
998 break;
b2580103
MF		 999 case OCFS2_IOC_RESVSP:
1000 case OCFS2_IOC_RESVSP64:
1001 case OCFS2_IOC_UNRESVSP:
1002 case OCFS2_IOC_UNRESVSP64:
d659072f 1003 case OCFS2_IOC_GROUP_EXTEND:
7909f2bf
TM		 1004 case OCFS2_IOC_GROUP_ADD:
1005 case OCFS2_IOC_GROUP_ADD64:
55e67872 1006 case FITRIM:
b2580103 1007 break;
34e6c59a
TM		 1008 case OCFS2_IOC_REFLINK:
1009 if (copy_from_user(&args, (struct reflink_arguments *)arg,
1010 sizeof(args)))
1011 return -EFAULT;
1012 preserve = (args.preserve != 0);
1013
1014 return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path),
1015 compat_ptr(args.new_path), preserve);
ddee5cdb
TY		 1016 case OCFS2_IOC_INFO:
1017 if (copy_from_user(&info, (struct ocfs2_info __user *)arg,
1018 sizeof(struct ocfs2_info)))
1019 return -EFAULT;
1020
1021 return ocfs2_info_handle(inode, &info, 1);
53069d4e
TY		 1022 case OCFS2_IOC_MOVE_EXT:
1023 break;
586d232b
MF		 1024 default:
1025 return -ENOIOCTLCMD;
1026 }
1027
c9ec1488 1028 return ocfs2_ioctl(file, cmd, arg);
586d232b
MF		 1029}
1030#endif
kernel source for telekom puls (alcatel/mediatek)