Commit | Line | Data |
---|---|---|
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> | |
19e8ac27 | 10 | #include <linux/blkdev.h> |
34e6c59a | 11 | #include <linux/compat.h> |
ca4d147e | 12 | |
ca4d147e HP |
13 | #include <cluster/masklog.h> |
14 | ||
15 | #include "ocfs2.h" | |
16 | #include "alloc.h" | |
17 | #include "dlmglue.h" | |
b2580103 | 18 | #include "file.h" |
ca4d147e HP |
19 | #include "inode.h" |
20 | #include "journal.h" | |
21 | ||
22 | #include "ocfs2_fs.h" | |
2d562518 | 23 | #include "ioctl.h" |
d659072f | 24 | #include "resize.h" |
bd50873d | 25 | #include "refcounttree.h" |
3e5db17d TY |
26 | #include "sysfile.h" |
27 | #include "dir.h" | |
28 | #include "buffer_head_io.h" | |
d24a10b9 | 29 | #include "suballoc.h" |
53069d4e | 30 | #include "move_extents.h" |
2d562518 | 31 | |
ddee5cdb TY |
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 | * This call is void because we are already reporting an error that may | |
39 | * be -EFAULT. The error will be returned from the ioctl(2) call. It's | |
40 | * just a best-effort to tell userspace that this request caused the error. | |
41 | */ | |
8aa1fa36 | 42 | static inline void o2info_set_request_error(struct ocfs2_info_request *kreq, |
ddee5cdb TY |
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 | ||
8aa1fa36 | 49 | static inline void o2info_set_request_filled(struct ocfs2_info_request *req) |
1936a267 TY |
50 | { |
51 | req->ir_flags |= OCFS2_INFO_FL_FILLED; | |
52 | } | |
53 | ||
8aa1fa36 | 54 | static inline void o2info_clear_request_filled(struct ocfs2_info_request *req) |
1936a267 TY |
55 | { |
56 | req->ir_flags &= ~OCFS2_INFO_FL_FILLED; | |
57 | } | |
58 | ||
3e5db17d TY |
59 | static inline int o2info_coherent(struct ocfs2_info_request *req) |
60 | { | |
61 | return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT)); | |
62 | } | |
1936a267 | 63 | |
ca4d147e HP |
64 | static int ocfs2_get_inode_attr(struct inode *inode, unsigned *flags) |
65 | { | |
66 | int status; | |
67 | ||
e63aecb6 | 68 | status = ocfs2_inode_lock(inode, NULL, 0); |
ca4d147e HP |
69 | if (status < 0) { |
70 | mlog_errno(status); | |
71 | return status; | |
72 | } | |
6e4b0d56 | 73 | ocfs2_get_inode_flags(OCFS2_I(inode)); |
ca4d147e | 74 | *flags = OCFS2_I(inode)->ip_attr; |
e63aecb6 | 75 | ocfs2_inode_unlock(inode, 0); |
ca4d147e | 76 | |
ca4d147e HP |
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); | |
1fabe148 | 85 | handle_t *handle = NULL; |
ca4d147e HP |
86 | struct buffer_head *bh = NULL; |
87 | unsigned oldflags; | |
88 | int status; | |
89 | ||
90 | mutex_lock(&inode->i_mutex); | |
91 | ||
e63aecb6 | 92 | status = ocfs2_inode_lock(inode, &bh, 1); |
ca4d147e HP |
93 | if (status < 0) { |
94 | mlog_errno(status); | |
95 | goto bail; | |
96 | } | |
97 | ||
ca4d147e | 98 | status = -EACCES; |
2e149670 | 99 | if (!inode_owner_or_capable(inode)) |
ca4d147e HP |
100 | goto bail_unlock; |
101 | ||
102 | if (!S_ISDIR(inode->i_mode)) | |
103 | flags &= ~OCFS2_DIRSYNC_FL; | |
104 | ||
ca4d147e HP |
105 | oldflags = ocfs2_inode->ip_attr; |
106 | flags = flags & mask; | |
107 | flags |= oldflags & ~mask; | |
108 | ||
109 | /* | |
110 | * The IMMUTABLE and APPEND_ONLY flags can only be changed by | |
111 | * the relevant capability. | |
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)) | |
b3e0767a JL |
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; | |
ca4d147e HP |
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 | ||
02dc1af4 | 134 | ocfs2_commit_trans(osb, handle); |
b3e0767a | 135 | |
ca4d147e | 136 | bail_unlock: |
e63aecb6 | 137 | ocfs2_inode_unlock(inode, 1); |
ca4d147e HP |
138 | bail: |
139 | mutex_unlock(&inode->i_mutex); | |
140 | ||
a81cb88b | 141 | brelse(bh); |
ca4d147e | 142 | |
ca4d147e HP |
143 | return status; |
144 | } | |
145 | ||
c253ed1f FF |
146 | static int ocfs2_info_handle_blocksize(struct inode *inode, |
147 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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; | |
1936a267 | 156 | |
8aa1fa36 | 157 | o2info_set_request_filled(&oib.ib_req); |
ddee5cdb TY |
158 | |
159 | if (o2info_to_user(oib, req)) | |
160 | goto bail; | |
161 | ||
162 | status = 0; | |
163 | bail: | |
164 | if (status) | |
8aa1fa36 | 165 | o2info_set_request_error(&oib.ib_req, req); |
ddee5cdb TY |
166 | |
167 | return status; | |
168 | } | |
169 | ||
c253ed1f FF |
170 | static int ocfs2_info_handle_clustersize(struct inode *inode, |
171 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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; | |
1936a267 | 181 | |
8aa1fa36 | 182 | o2info_set_request_filled(&oic.ic_req); |
ddee5cdb TY |
183 | |
184 | if (o2info_to_user(oic, req)) | |
185 | goto bail; | |
186 | ||
187 | status = 0; | |
188 | bail: | |
189 | if (status) | |
8aa1fa36 | 190 | o2info_set_request_error(&oic.ic_req, req); |
ddee5cdb TY |
191 | |
192 | return status; | |
193 | } | |
194 | ||
c253ed1f FF |
195 | static int ocfs2_info_handle_maxslots(struct inode *inode, |
196 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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; | |
1936a267 | 206 | |
8aa1fa36 | 207 | o2info_set_request_filled(&oim.im_req); |
ddee5cdb TY |
208 | |
209 | if (o2info_to_user(oim, req)) | |
210 | goto bail; | |
211 | ||
212 | status = 0; | |
213 | bail: | |
214 | if (status) | |
8aa1fa36 | 215 | o2info_set_request_error(&oim.im_req, req); |
ddee5cdb TY |
216 | |
217 | return status; | |
218 | } | |
219 | ||
c253ed1f FF |
220 | static int ocfs2_info_handle_label(struct inode *inode, |
221 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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); | |
1936a267 | 231 | |
8aa1fa36 | 232 | o2info_set_request_filled(&oil.il_req); |
ddee5cdb TY |
233 | |
234 | if (o2info_to_user(oil, req)) | |
235 | goto bail; | |
236 | ||
237 | status = 0; | |
238 | bail: | |
239 | if (status) | |
8aa1fa36 | 240 | o2info_set_request_error(&oil.il_req, req); |
ddee5cdb TY |
241 | |
242 | return status; | |
243 | } | |
244 | ||
c253ed1f FF |
245 | static int ocfs2_info_handle_uuid(struct inode *inode, |
246 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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); | |
1936a267 | 256 | |
8aa1fa36 | 257 | o2info_set_request_filled(&oiu.iu_req); |
ddee5cdb TY |
258 | |
259 | if (o2info_to_user(oiu, req)) | |
260 | goto bail; | |
261 | ||
262 | status = 0; | |
263 | bail: | |
264 | if (status) | |
8aa1fa36 | 265 | o2info_set_request_error(&oiu.iu_req, req); |
ddee5cdb TY |
266 | |
267 | return status; | |
268 | } | |
269 | ||
c253ed1f FF |
270 | static int ocfs2_info_handle_fs_features(struct inode *inode, |
271 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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; | |
1936a267 | 283 | |
8aa1fa36 | 284 | o2info_set_request_filled(&oif.if_req); |
ddee5cdb TY |
285 | |
286 | if (o2info_to_user(oif, req)) | |
287 | goto bail; | |
288 | ||
289 | status = 0; | |
290 | bail: | |
291 | if (status) | |
8aa1fa36 | 292 | o2info_set_request_error(&oif.if_req, req); |
ddee5cdb TY |
293 | |
294 | return status; | |
295 | } | |
296 | ||
c253ed1f FF |
297 | static int ocfs2_info_handle_journal_size(struct inode *inode, |
298 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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 | ||
f17c20dd | 307 | oij.ij_journal_size = i_size_read(osb->journal->j_inode); |
ddee5cdb | 308 | |
8aa1fa36 | 309 | o2info_set_request_filled(&oij.ij_req); |
ddee5cdb TY |
310 | |
311 | if (o2info_to_user(oij, req)) | |
312 | goto bail; | |
313 | ||
314 | status = 0; | |
315 | bail: | |
316 | if (status) | |
8aa1fa36 | 317 | o2info_set_request_error(&oij.ij_req, req); |
ddee5cdb TY |
318 | |
319 | return status; | |
320 | } | |
321 | ||
c253ed1f FF |
322 | static 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) | |
3e5db17d TY |
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 | ||
358 | bail: | |
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 | ||
c253ed1f FF |
370 | static int ocfs2_info_handle_freeinode(struct inode *inode, |
371 | struct ocfs2_info_request __user *req) | |
3e5db17d TY |
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); | |
87f0d5c8 | 385 | goto out_err; |
3e5db17d TY |
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); | |
3e5db17d TY |
417 | |
418 | iput(inode_alloc); | |
419 | inode_alloc = NULL; | |
7dc3e839 | 420 | |
421 | if (status < 0) | |
422 | goto bail; | |
3e5db17d TY |
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; | |
431 | bail: | |
432 | if (status) | |
433 | o2info_set_request_error(&oifi->ifi_req, req); | |
434 | ||
435 | kfree(oifi); | |
87f0d5c8 | 436 | out_err: |
3e5db17d TY |
437 | return status; |
438 | } | |
439 | ||
d24a10b9 TY |
440 | static 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 | ||
453 | static 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 | ||
c253ed1f FF |
466 | static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg, |
467 | unsigned int chunksize) | |
d24a10b9 TY |
468 | { |
469 | o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize); | |
470 | o2ffg_update_stats(&(ffg->iff_ffs), chunksize); | |
471 | } | |
472 | ||
c253ed1f FF |
473 | static 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) | |
d24a10b9 TY |
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 | * last chunk may be not an entire one. | |
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 | * - chunk_free counts free clusters in #N chunk. | |
541 | * - last_chunksize records the size(in) clusters | |
542 | * for the last real free chunk being counted. | |
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 | * need to update the info for last free chunk. | |
564 | */ | |
565 | if (last_chunksize) | |
566 | ocfs2_info_update_ffg(ffg, last_chunksize); | |
567 | ||
568 | } while (le64_to_cpu(bg->bg_next_group)); | |
569 | ||
570 | bail: | |
571 | brelse(bh); | |
572 | ||
573 | return status; | |
574 | } | |
575 | ||
c253ed1f FF |
576 | static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb, |
577 | struct inode *gb_inode, u64 blkno, | |
578 | struct ocfs2_info_freefrag *ffg) | |
d24a10b9 TY |
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 | * Chunksize(in) clusters from userspace should be | |
611 | * less than clusters in a group. | |
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); | |
641 | bail: | |
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 | ||
c253ed1f FF |
656 | static int ocfs2_info_handle_freefrag(struct inode *inode, |
657 | struct ocfs2_info_request __user *req) | |
d24a10b9 TY |
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); | |
87f0d5c8 | 671 | goto out_err; |
d24a10b9 TY |
672 | } |
673 | ||
674 | if (o2info_from_user(*oiff, req)) | |
675 | goto bail; | |
676 | /* | |
677 | * chunksize from userspace should be power of 2. | |
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 | ||
7ebab453 WY |
712 | if (o2info_to_user(*oiff, req)) { |
713 | status = -EFAULT; | |
d24a10b9 | 714 | goto bail; |
7ebab453 | 715 | } |
d24a10b9 TY |
716 | |
717 | status = 0; | |
718 | bail: | |
719 | if (status) | |
720 | o2info_set_request_error(&oiff->iff_req, req); | |
721 | ||
722 | kfree(oiff); | |
87f0d5c8 | 723 | out_err: |
ddee5cdb TY |
724 | return status; |
725 | } | |
726 | ||
c253ed1f FF |
727 | static int ocfs2_info_handle_unknown(struct inode *inode, |
728 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
729 | { |
730 | int status = -EFAULT; | |
731 | struct ocfs2_info_request oir; | |
732 | ||
733 | if (o2info_from_user(oir, req)) | |
734 | goto bail; | |
735 | ||
8aa1fa36 | 736 | o2info_clear_request_filled(&oir); |
ddee5cdb TY |
737 | |
738 | if (o2info_to_user(oir, req)) | |
739 | goto bail; | |
740 | ||
741 | status = 0; | |
742 | bail: | |
743 | if (status) | |
8aa1fa36 | 744 | o2info_set_request_error(&oir, req); |
ddee5cdb TY |
745 | |
746 | return status; | |
747 | } | |
748 | ||
749 | /* | |
750 | * Validate and distinguish OCFS2_IOC_INFO requests. | |
751 | * | |
752 | * - validate the magic number. | |
753 | * - distinguish different requests. | |
754 | * - validate size of different requests. | |
755 | */ | |
c253ed1f FF |
756 | static int ocfs2_info_handle_request(struct inode *inode, |
757 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
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; | |
3e5db17d TY |
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; | |
d24a10b9 TY |
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; | |
ddee5cdb TY |
806 | default: |
807 | status = ocfs2_info_handle_unknown(inode, req); | |
808 | break; | |
809 | } | |
810 | ||
811 | bail: | |
812 | return status; | |
813 | } | |
814 | ||
c253ed1f FF |
815 | static int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx, |
816 | u64 *req_addr, int compat_flag) | |
ddee5cdb TY |
817 | { |
818 | int status = -EFAULT; | |
819 | u64 __user *bp = NULL; | |
820 | ||
821 | if (compat_flag) { | |
822 | #ifdef CONFIG_COMPAT | |
823 | /* | |
824 | * pointer bp stores the base address of a pointers array, | |
825 | * which collects all addresses of separate request. | |
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; | |
838 | bail: | |
839 | return status; | |
840 | } | |
841 | ||
842 | /* | |
843 | * OCFS2_IOC_INFO handles an array of requests passed from userspace. | |
844 | * | |
845 | * ocfs2_info_handle() recevies a large info aggregation, grab and | |
846 | * validate the request count from header, then break it into small | |
847 | * pieces, later specific handlers can handle them one by one. | |
848 | * | |
849 | * Idea here is to make each separate request small enough to ensure | |
850 | * a better backward&forward compatibility, since a small piece of | |
851 | * request will be less likely to be broken if disk layout get changed. | |
852 | */ | |
c253ed1f FF |
853 | static int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, |
854 | int compat_flag) | |
ddee5cdb TY |
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 | ||
f6a56903 | 872 | reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr; |
ddee5cdb TY |
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 | ||
883 | bail: | |
884 | return status; | |
885 | } | |
886 | ||
c9ec1488 | 887 | long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ca4d147e | 888 | { |
496ad9aa | 889 | struct inode *inode = file_inode(filp); |
ca4d147e | 890 | unsigned int flags; |
d659072f | 891 | int new_clusters; |
ca4d147e | 892 | int status; |
b2580103 | 893 | struct ocfs2_space_resv sr; |
7909f2bf | 894 | struct ocfs2_new_group_input input; |
bd50873d | 895 | struct reflink_arguments args; |
f6a56903 AV |
896 | const char __user *old_path; |
897 | const char __user *new_path; | |
bd50873d | 898 | bool preserve; |
ddee5cdb | 899 | struct ocfs2_info info; |
f6a56903 | 900 | void __user *argp = (void __user *)arg; |
ca4d147e HP |
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 | ||
a561be71 | 914 | status = mnt_want_write_file(filp); |
42a74f20 DH |
915 | if (status) |
916 | return status; | |
917 | status = ocfs2_set_inode_attr(inode, flags, | |
ca4d147e | 918 | OCFS2_FL_MODIFIABLE); |
2a79f17e | 919 | mnt_drop_write_file(filp); |
42a74f20 | 920 | return status; |
b2580103 MF |
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); | |
d659072f | 929 | case OCFS2_IOC_GROUP_EXTEND: |
0957f007 MF |
930 | if (!capable(CAP_SYS_RESOURCE)) |
931 | return -EPERM; | |
932 | ||
d659072f TM |
933 | if (get_user(new_clusters, (int __user *)arg)) |
934 | return -EFAULT; | |
935 | ||
fef6925c JK |
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; | |
7909f2bf TM |
942 | case OCFS2_IOC_GROUP_ADD: |
943 | case OCFS2_IOC_GROUP_ADD64: | |
0957f007 MF |
944 | if (!capable(CAP_SYS_RESOURCE)) |
945 | return -EPERM; | |
946 | ||
7909f2bf TM |
947 | if (copy_from_user(&input, (int __user *) arg, sizeof(input))) |
948 | return -EFAULT; | |
949 | ||
fef6925c JK |
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; | |
bd50873d | 956 | case OCFS2_IOC_REFLINK: |
f6a56903 | 957 | if (copy_from_user(&args, argp, sizeof(args))) |
bd50873d | 958 | return -EFAULT; |
f6a56903 AV |
959 | old_path = (const char __user *)(unsigned long)args.old_path; |
960 | new_path = (const char __user *)(unsigned long)args.new_path; | |
bd50873d TM |
961 | preserve = (args.preserve != 0); |
962 | ||
963 | return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); | |
ddee5cdb | 964 | case OCFS2_IOC_INFO: |
f6a56903 | 965 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
966 | return -EFAULT; |
967 | ||
968 | return ocfs2_info_handle(inode, &info, 0); | |
55e67872 TM |
969 | case FITRIM: |
970 | { | |
971 | struct super_block *sb = inode->i_sb; | |
19e8ac27 | 972 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
55e67872 TM |
973 | struct fstrim_range range; |
974 | int ret = 0; | |
975 | ||
976 | if (!capable(CAP_SYS_ADMIN)) | |
977 | return -EPERM; | |
978 | ||
19e8ac27 JL |
979 | if (!blk_queue_discard(q)) |
980 | return -EOPNOTSUPP; | |
981 | ||
f6a56903 | 982 | if (copy_from_user(&range, argp, sizeof(range))) |
55e67872 TM |
983 | return -EFAULT; |
984 | ||
1ba2212b JL |
985 | range.minlen = max_t(u64, q->limits.discard_granularity, |
986 | range.minlen); | |
55e67872 TM |
987 | ret = ocfs2_trim_fs(sb, &range); |
988 | if (ret < 0) | |
989 | return ret; | |
990 | ||
f6a56903 | 991 | if (copy_to_user(argp, &range, sizeof(range))) |
55e67872 TM |
992 | return -EFAULT; |
993 | ||
994 | return 0; | |
995 | } | |
53069d4e | 996 | case OCFS2_IOC_MOVE_EXT: |
f6a56903 | 997 | return ocfs2_ioctl_move_extents(filp, argp); |
ca4d147e HP |
998 | default: |
999 | return -ENOTTY; | |
1000 | } | |
1001 | } | |
1002 | ||
586d232b MF |
1003 | #ifdef CONFIG_COMPAT |
1004 | long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
1005 | { | |
34e6c59a TM |
1006 | bool preserve; |
1007 | struct reflink_arguments args; | |
496ad9aa | 1008 | struct inode *inode = file_inode(file); |
ddee5cdb | 1009 | struct ocfs2_info info; |
f6a56903 | 1010 | void __user *argp = (void __user *)arg; |
34e6c59a | 1011 | |
586d232b MF |
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; | |
b2580103 MF |
1019 | case OCFS2_IOC_RESVSP: |
1020 | case OCFS2_IOC_RESVSP64: | |
1021 | case OCFS2_IOC_UNRESVSP: | |
1022 | case OCFS2_IOC_UNRESVSP64: | |
d659072f | 1023 | case OCFS2_IOC_GROUP_EXTEND: |
7909f2bf TM |
1024 | case OCFS2_IOC_GROUP_ADD: |
1025 | case OCFS2_IOC_GROUP_ADD64: | |
55e67872 | 1026 | case FITRIM: |
b2580103 | 1027 | break; |
34e6c59a | 1028 | case OCFS2_IOC_REFLINK: |
f6a56903 | 1029 | if (copy_from_user(&args, argp, sizeof(args))) |
34e6c59a TM |
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); | |
ddee5cdb | 1035 | case OCFS2_IOC_INFO: |
f6a56903 | 1036 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
1037 | return -EFAULT; |
1038 | ||
1039 | return ocfs2_info_handle(inode, &info, 1); | |
53069d4e TY |
1040 | case OCFS2_IOC_MOVE_EXT: |
1041 | break; | |
586d232b MF |
1042 | default: |
1043 | return -ENOIOCTLCMD; | |
1044 | } | |
1045 | ||
c9ec1488 | 1046 | return ocfs2_ioctl(file, cmd, arg); |
586d232b MF |
1047 | } |
1048 | #endif |