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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
ca4d147e HP |
2 | /* |
3 | * linux/fs/ocfs2/ioctl.c | |
4 | * | |
5 | * Copyright (C) 2006 Herbert Poetzl | |
6 | * adapted from Remy Card's ext2/ioctl.c | |
7 | */ | |
8 | ||
9 | #include <linux/fs.h> | |
10 | #include <linux/mount.h> | |
19e8ac27 | 11 | #include <linux/blkdev.h> |
34e6c59a | 12 | #include <linux/compat.h> |
ca4d147e | 13 | |
ca4d147e HP |
14 | #include <cluster/masklog.h> |
15 | ||
16 | #include "ocfs2.h" | |
17 | #include "alloc.h" | |
18 | #include "dlmglue.h" | |
b2580103 | 19 | #include "file.h" |
ca4d147e HP |
20 | #include "inode.h" |
21 | #include "journal.h" | |
22 | ||
23 | #include "ocfs2_fs.h" | |
2d562518 | 24 | #include "ioctl.h" |
d659072f | 25 | #include "resize.h" |
bd50873d | 26 | #include "refcounttree.h" |
3e5db17d TY |
27 | #include "sysfile.h" |
28 | #include "dir.h" | |
29 | #include "buffer_head_io.h" | |
d24a10b9 | 30 | #include "suballoc.h" |
53069d4e | 31 | #include "move_extents.h" |
2d562518 | 32 | |
ddee5cdb TY |
33 | #define o2info_from_user(a, b) \ |
34 | copy_from_user(&(a), (b), sizeof(a)) | |
35 | #define o2info_to_user(a, b) \ | |
36 | copy_to_user((typeof(a) __user *)b, &(a), sizeof(a)) | |
37 | ||
38 | /* | |
2b462638 BH |
39 | * This is just a best-effort to tell userspace that this request |
40 | * caused the error. | |
ddee5cdb | 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 | ||
5955102c | 90 | inode_lock(inode); |
ca4d147e | 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 | ||
5aca2842 DW |
109 | status = vfs_ioc_setflags_prepare(inode, oldflags, flags); |
110 | if (status) | |
111 | goto bail_unlock; | |
b3e0767a JL |
112 | |
113 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
114 | if (IS_ERR(handle)) { | |
115 | status = PTR_ERR(handle); | |
116 | mlog_errno(status); | |
117 | goto bail_unlock; | |
ca4d147e HP |
118 | } |
119 | ||
120 | ocfs2_inode->ip_attr = flags; | |
121 | ocfs2_set_inode_flags(inode); | |
122 | ||
123 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
124 | if (status < 0) | |
125 | mlog_errno(status); | |
126 | ||
02dc1af4 | 127 | ocfs2_commit_trans(osb, handle); |
b3e0767a | 128 | |
ca4d147e | 129 | bail_unlock: |
e63aecb6 | 130 | ocfs2_inode_unlock(inode, 1); |
ca4d147e | 131 | bail: |
5955102c | 132 | inode_unlock(inode); |
ca4d147e | 133 | |
a81cb88b | 134 | brelse(bh); |
ca4d147e | 135 | |
ca4d147e HP |
136 | return status; |
137 | } | |
138 | ||
c253ed1f FF |
139 | static int ocfs2_info_handle_blocksize(struct inode *inode, |
140 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 141 | { |
ddee5cdb TY |
142 | struct ocfs2_info_blocksize oib; |
143 | ||
144 | if (o2info_from_user(oib, req)) | |
2b462638 | 145 | return -EFAULT; |
ddee5cdb TY |
146 | |
147 | oib.ib_blocksize = inode->i_sb->s_blocksize; | |
1936a267 | 148 | |
8aa1fa36 | 149 | o2info_set_request_filled(&oib.ib_req); |
ddee5cdb TY |
150 | |
151 | if (o2info_to_user(oib, req)) | |
2b462638 | 152 | return -EFAULT; |
ddee5cdb | 153 | |
2b462638 | 154 | return 0; |
ddee5cdb TY |
155 | } |
156 | ||
c253ed1f FF |
157 | static int ocfs2_info_handle_clustersize(struct inode *inode, |
158 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 159 | { |
ddee5cdb TY |
160 | struct ocfs2_info_clustersize oic; |
161 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
162 | ||
163 | if (o2info_from_user(oic, req)) | |
2b462638 | 164 | return -EFAULT; |
ddee5cdb TY |
165 | |
166 | oic.ic_clustersize = osb->s_clustersize; | |
1936a267 | 167 | |
8aa1fa36 | 168 | o2info_set_request_filled(&oic.ic_req); |
ddee5cdb TY |
169 | |
170 | if (o2info_to_user(oic, req)) | |
2b462638 | 171 | return -EFAULT; |
ddee5cdb | 172 | |
2b462638 | 173 | return 0; |
ddee5cdb TY |
174 | } |
175 | ||
c253ed1f FF |
176 | static int ocfs2_info_handle_maxslots(struct inode *inode, |
177 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 178 | { |
ddee5cdb TY |
179 | struct ocfs2_info_maxslots oim; |
180 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
181 | ||
182 | if (o2info_from_user(oim, req)) | |
2b462638 | 183 | return -EFAULT; |
ddee5cdb TY |
184 | |
185 | oim.im_max_slots = osb->max_slots; | |
1936a267 | 186 | |
8aa1fa36 | 187 | o2info_set_request_filled(&oim.im_req); |
ddee5cdb TY |
188 | |
189 | if (o2info_to_user(oim, req)) | |
2b462638 | 190 | return -EFAULT; |
ddee5cdb | 191 | |
2b462638 | 192 | return 0; |
ddee5cdb TY |
193 | } |
194 | ||
c253ed1f FF |
195 | static int ocfs2_info_handle_label(struct inode *inode, |
196 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 197 | { |
ddee5cdb TY |
198 | struct ocfs2_info_label oil; |
199 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
200 | ||
201 | if (o2info_from_user(oil, req)) | |
2b462638 | 202 | return -EFAULT; |
ddee5cdb TY |
203 | |
204 | memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN); | |
1936a267 | 205 | |
8aa1fa36 | 206 | o2info_set_request_filled(&oil.il_req); |
ddee5cdb TY |
207 | |
208 | if (o2info_to_user(oil, req)) | |
2b462638 | 209 | return -EFAULT; |
ddee5cdb | 210 | |
2b462638 | 211 | return 0; |
ddee5cdb TY |
212 | } |
213 | ||
c253ed1f FF |
214 | static int ocfs2_info_handle_uuid(struct inode *inode, |
215 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 216 | { |
ddee5cdb TY |
217 | struct ocfs2_info_uuid oiu; |
218 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
219 | ||
220 | if (o2info_from_user(oiu, req)) | |
2b462638 | 221 | return -EFAULT; |
ddee5cdb TY |
222 | |
223 | memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1); | |
1936a267 | 224 | |
8aa1fa36 | 225 | o2info_set_request_filled(&oiu.iu_req); |
ddee5cdb TY |
226 | |
227 | if (o2info_to_user(oiu, req)) | |
2b462638 | 228 | return -EFAULT; |
ddee5cdb | 229 | |
2b462638 | 230 | return 0; |
ddee5cdb TY |
231 | } |
232 | ||
c253ed1f FF |
233 | static int ocfs2_info_handle_fs_features(struct inode *inode, |
234 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 235 | { |
ddee5cdb TY |
236 | struct ocfs2_info_fs_features oif; |
237 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
238 | ||
239 | if (o2info_from_user(oif, req)) | |
2b462638 | 240 | return -EFAULT; |
ddee5cdb TY |
241 | |
242 | oif.if_compat_features = osb->s_feature_compat; | |
243 | oif.if_incompat_features = osb->s_feature_incompat; | |
244 | oif.if_ro_compat_features = osb->s_feature_ro_compat; | |
1936a267 | 245 | |
8aa1fa36 | 246 | o2info_set_request_filled(&oif.if_req); |
ddee5cdb TY |
247 | |
248 | if (o2info_to_user(oif, req)) | |
2b462638 | 249 | return -EFAULT; |
ddee5cdb | 250 | |
2b462638 | 251 | return 0; |
ddee5cdb TY |
252 | } |
253 | ||
c253ed1f FF |
254 | static int ocfs2_info_handle_journal_size(struct inode *inode, |
255 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 256 | { |
ddee5cdb TY |
257 | struct ocfs2_info_journal_size oij; |
258 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
259 | ||
260 | if (o2info_from_user(oij, req)) | |
2b462638 | 261 | return -EFAULT; |
ddee5cdb | 262 | |
f17c20dd | 263 | oij.ij_journal_size = i_size_read(osb->journal->j_inode); |
ddee5cdb | 264 | |
8aa1fa36 | 265 | o2info_set_request_filled(&oij.ij_req); |
ddee5cdb TY |
266 | |
267 | if (o2info_to_user(oij, req)) | |
2b462638 | 268 | return -EFAULT; |
ddee5cdb | 269 | |
2b462638 | 270 | return 0; |
ddee5cdb TY |
271 | } |
272 | ||
c253ed1f FF |
273 | static int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb, |
274 | struct inode *inode_alloc, u64 blkno, | |
275 | struct ocfs2_info_freeinode *fi, | |
276 | u32 slot) | |
3e5db17d TY |
277 | { |
278 | int status = 0, unlock = 0; | |
279 | ||
280 | struct buffer_head *bh = NULL; | |
281 | struct ocfs2_dinode *dinode_alloc = NULL; | |
282 | ||
283 | if (inode_alloc) | |
5955102c | 284 | inode_lock(inode_alloc); |
3e5db17d | 285 | |
2abb7d3b | 286 | if (inode_alloc && o2info_coherent(&fi->ifi_req)) { |
3e5db17d TY |
287 | status = ocfs2_inode_lock(inode_alloc, &bh, 0); |
288 | if (status < 0) { | |
289 | mlog_errno(status); | |
290 | goto bail; | |
291 | } | |
292 | unlock = 1; | |
293 | } else { | |
294 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
295 | if (status < 0) { | |
296 | mlog_errno(status); | |
297 | goto bail; | |
298 | } | |
299 | } | |
300 | ||
301 | dinode_alloc = (struct ocfs2_dinode *)bh->b_data; | |
302 | ||
303 | fi->ifi_stat[slot].lfi_total = | |
304 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total); | |
305 | fi->ifi_stat[slot].lfi_free = | |
306 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) - | |
307 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_used); | |
308 | ||
309 | bail: | |
310 | if (unlock) | |
311 | ocfs2_inode_unlock(inode_alloc, 0); | |
312 | ||
313 | if (inode_alloc) | |
5955102c | 314 | inode_unlock(inode_alloc); |
3e5db17d TY |
315 | |
316 | brelse(bh); | |
317 | ||
318 | return status; | |
319 | } | |
320 | ||
c253ed1f FF |
321 | static int ocfs2_info_handle_freeinode(struct inode *inode, |
322 | struct ocfs2_info_request __user *req) | |
3e5db17d TY |
323 | { |
324 | u32 i; | |
325 | u64 blkno = -1; | |
326 | char namebuf[40]; | |
2b462638 | 327 | int status, type = INODE_ALLOC_SYSTEM_INODE; |
3e5db17d TY |
328 | struct ocfs2_info_freeinode *oifi = NULL; |
329 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
330 | struct inode *inode_alloc = NULL; | |
331 | ||
332 | oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL); | |
333 | if (!oifi) { | |
334 | status = -ENOMEM; | |
335 | mlog_errno(status); | |
87f0d5c8 | 336 | goto out_err; |
3e5db17d TY |
337 | } |
338 | ||
2b462638 BH |
339 | if (o2info_from_user(*oifi, req)) { |
340 | status = -EFAULT; | |
341 | goto out_free; | |
342 | } | |
3e5db17d TY |
343 | |
344 | oifi->ifi_slotnum = osb->max_slots; | |
345 | ||
346 | for (i = 0; i < oifi->ifi_slotnum; i++) { | |
347 | if (o2info_coherent(&oifi->ifi_req)) { | |
348 | inode_alloc = ocfs2_get_system_file_inode(osb, type, i); | |
349 | if (!inode_alloc) { | |
350 | mlog(ML_ERROR, "unable to get alloc inode in " | |
351 | "slot %u\n", i); | |
352 | status = -EIO; | |
353 | goto bail; | |
354 | } | |
355 | } else { | |
356 | ocfs2_sprintf_system_inode_name(namebuf, | |
357 | sizeof(namebuf), | |
358 | type, i); | |
359 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
360 | namebuf, | |
361 | strlen(namebuf), | |
362 | &blkno); | |
363 | if (status < 0) { | |
364 | status = -ENOENT; | |
365 | goto bail; | |
366 | } | |
367 | } | |
368 | ||
369 | status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i); | |
3e5db17d TY |
370 | |
371 | iput(inode_alloc); | |
372 | inode_alloc = NULL; | |
7dc3e839 | 373 | |
374 | if (status < 0) | |
375 | goto bail; | |
3e5db17d TY |
376 | } |
377 | ||
378 | o2info_set_request_filled(&oifi->ifi_req); | |
379 | ||
2b462638 BH |
380 | if (o2info_to_user(*oifi, req)) { |
381 | status = -EFAULT; | |
382 | goto out_free; | |
383 | } | |
3e5db17d TY |
384 | |
385 | status = 0; | |
386 | bail: | |
387 | if (status) | |
388 | o2info_set_request_error(&oifi->ifi_req, req); | |
2b462638 | 389 | out_free: |
3e5db17d | 390 | kfree(oifi); |
87f0d5c8 | 391 | out_err: |
3e5db17d TY |
392 | return status; |
393 | } | |
394 | ||
d24a10b9 TY |
395 | static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist, |
396 | unsigned int chunksize) | |
397 | { | |
731a40fa | 398 | u32 index; |
d24a10b9 TY |
399 | |
400 | index = __ilog2_u32(chunksize); | |
401 | if (index >= OCFS2_INFO_MAX_HIST) | |
402 | index = OCFS2_INFO_MAX_HIST - 1; | |
403 | ||
404 | hist->fc_chunks[index]++; | |
405 | hist->fc_clusters[index] += chunksize; | |
406 | } | |
407 | ||
408 | static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats, | |
409 | unsigned int chunksize) | |
410 | { | |
411 | if (chunksize > stats->ffs_max) | |
412 | stats->ffs_max = chunksize; | |
413 | ||
414 | if (chunksize < stats->ffs_min) | |
415 | stats->ffs_min = chunksize; | |
416 | ||
417 | stats->ffs_avg += chunksize; | |
418 | stats->ffs_free_chunks_real++; | |
419 | } | |
420 | ||
c253ed1f FF |
421 | static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg, |
422 | unsigned int chunksize) | |
d24a10b9 TY |
423 | { |
424 | o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize); | |
425 | o2ffg_update_stats(&(ffg->iff_ffs), chunksize); | |
426 | } | |
427 | ||
c253ed1f FF |
428 | static int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb, |
429 | struct inode *gb_inode, | |
430 | struct ocfs2_dinode *gb_dinode, | |
431 | struct ocfs2_chain_rec *rec, | |
432 | struct ocfs2_info_freefrag *ffg, | |
433 | u32 chunks_in_group) | |
d24a10b9 TY |
434 | { |
435 | int status = 0, used; | |
436 | u64 blkno; | |
437 | ||
438 | struct buffer_head *bh = NULL; | |
439 | struct ocfs2_group_desc *bg = NULL; | |
440 | ||
441 | unsigned int max_bits, num_clusters; | |
442 | unsigned int offset = 0, cluster, chunk; | |
443 | unsigned int chunk_free, last_chunksize = 0; | |
444 | ||
445 | if (!le32_to_cpu(rec->c_free)) | |
446 | goto bail; | |
447 | ||
448 | do { | |
449 | if (!bg) | |
450 | blkno = le64_to_cpu(rec->c_blkno); | |
451 | else | |
452 | blkno = le64_to_cpu(bg->bg_next_group); | |
453 | ||
454 | if (bh) { | |
455 | brelse(bh); | |
456 | bh = NULL; | |
457 | } | |
458 | ||
459 | if (o2info_coherent(&ffg->iff_req)) | |
460 | status = ocfs2_read_group_descriptor(gb_inode, | |
461 | gb_dinode, | |
462 | blkno, &bh); | |
463 | else | |
464 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
465 | ||
466 | if (status < 0) { | |
467 | mlog(ML_ERROR, "Can't read the group descriptor # " | |
468 | "%llu from device.", (unsigned long long)blkno); | |
469 | status = -EIO; | |
470 | goto bail; | |
471 | } | |
472 | ||
473 | bg = (struct ocfs2_group_desc *)bh->b_data; | |
474 | ||
475 | if (!le16_to_cpu(bg->bg_free_bits_count)) | |
476 | continue; | |
477 | ||
478 | max_bits = le16_to_cpu(bg->bg_bits); | |
479 | offset = 0; | |
480 | ||
481 | for (chunk = 0; chunk < chunks_in_group; chunk++) { | |
482 | /* | |
483 | * last chunk may be not an entire one. | |
484 | */ | |
485 | if ((offset + ffg->iff_chunksize) > max_bits) | |
486 | num_clusters = max_bits - offset; | |
487 | else | |
488 | num_clusters = ffg->iff_chunksize; | |
489 | ||
490 | chunk_free = 0; | |
491 | for (cluster = 0; cluster < num_clusters; cluster++) { | |
492 | used = ocfs2_test_bit(offset, | |
493 | (unsigned long *)bg->bg_bitmap); | |
494 | /* | |
495 | * - chunk_free counts free clusters in #N chunk. | |
496 | * - last_chunksize records the size(in) clusters | |
497 | * for the last real free chunk being counted. | |
498 | */ | |
499 | if (!used) { | |
500 | last_chunksize++; | |
501 | chunk_free++; | |
502 | } | |
503 | ||
504 | if (used && last_chunksize) { | |
505 | ocfs2_info_update_ffg(ffg, | |
506 | last_chunksize); | |
507 | last_chunksize = 0; | |
508 | } | |
509 | ||
510 | offset++; | |
511 | } | |
512 | ||
513 | if (chunk_free == ffg->iff_chunksize) | |
514 | ffg->iff_ffs.ffs_free_chunks++; | |
515 | } | |
516 | ||
517 | /* | |
518 | * need to update the info for last free chunk. | |
519 | */ | |
520 | if (last_chunksize) | |
521 | ocfs2_info_update_ffg(ffg, last_chunksize); | |
522 | ||
523 | } while (le64_to_cpu(bg->bg_next_group)); | |
524 | ||
525 | bail: | |
526 | brelse(bh); | |
527 | ||
528 | return status; | |
529 | } | |
530 | ||
c253ed1f FF |
531 | static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb, |
532 | struct inode *gb_inode, u64 blkno, | |
533 | struct ocfs2_info_freefrag *ffg) | |
d24a10b9 TY |
534 | { |
535 | u32 chunks_in_group; | |
536 | int status = 0, unlock = 0, i; | |
537 | ||
538 | struct buffer_head *bh = NULL; | |
539 | struct ocfs2_chain_list *cl = NULL; | |
540 | struct ocfs2_chain_rec *rec = NULL; | |
541 | struct ocfs2_dinode *gb_dinode = NULL; | |
542 | ||
543 | if (gb_inode) | |
5955102c | 544 | inode_lock(gb_inode); |
d24a10b9 TY |
545 | |
546 | if (o2info_coherent(&ffg->iff_req)) { | |
547 | status = ocfs2_inode_lock(gb_inode, &bh, 0); | |
548 | if (status < 0) { | |
549 | mlog_errno(status); | |
550 | goto bail; | |
551 | } | |
552 | unlock = 1; | |
553 | } else { | |
554 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
555 | if (status < 0) { | |
556 | mlog_errno(status); | |
557 | goto bail; | |
558 | } | |
559 | } | |
560 | ||
561 | gb_dinode = (struct ocfs2_dinode *)bh->b_data; | |
562 | cl = &(gb_dinode->id2.i_chain); | |
563 | ||
564 | /* | |
565 | * Chunksize(in) clusters from userspace should be | |
566 | * less than clusters in a group. | |
567 | */ | |
568 | if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) { | |
569 | status = -EINVAL; | |
570 | goto bail; | |
571 | } | |
572 | ||
573 | memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats)); | |
574 | ||
575 | ffg->iff_ffs.ffs_min = ~0U; | |
576 | ffg->iff_ffs.ffs_clusters = | |
577 | le32_to_cpu(gb_dinode->id1.bitmap1.i_total); | |
578 | ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters - | |
579 | le32_to_cpu(gb_dinode->id1.bitmap1.i_used); | |
580 | ||
581 | chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1; | |
582 | ||
583 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) { | |
584 | rec = &(cl->cl_recs[i]); | |
585 | status = ocfs2_info_freefrag_scan_chain(osb, gb_inode, | |
586 | gb_dinode, | |
587 | rec, ffg, | |
588 | chunks_in_group); | |
589 | if (status) | |
590 | goto bail; | |
591 | } | |
592 | ||
593 | if (ffg->iff_ffs.ffs_free_chunks_real) | |
594 | ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg / | |
595 | ffg->iff_ffs.ffs_free_chunks_real); | |
596 | bail: | |
597 | if (unlock) | |
598 | ocfs2_inode_unlock(gb_inode, 0); | |
599 | ||
600 | if (gb_inode) | |
5955102c | 601 | inode_unlock(gb_inode); |
d24a10b9 | 602 | |
72865d92 | 603 | iput(gb_inode); |
d24a10b9 TY |
604 | brelse(bh); |
605 | ||
606 | return status; | |
607 | } | |
608 | ||
c253ed1f FF |
609 | static int ocfs2_info_handle_freefrag(struct inode *inode, |
610 | struct ocfs2_info_request __user *req) | |
d24a10b9 TY |
611 | { |
612 | u64 blkno = -1; | |
613 | char namebuf[40]; | |
2b462638 | 614 | int status, type = GLOBAL_BITMAP_SYSTEM_INODE; |
d24a10b9 TY |
615 | |
616 | struct ocfs2_info_freefrag *oiff; | |
617 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
618 | struct inode *gb_inode = NULL; | |
619 | ||
620 | oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL); | |
621 | if (!oiff) { | |
622 | status = -ENOMEM; | |
623 | mlog_errno(status); | |
87f0d5c8 | 624 | goto out_err; |
d24a10b9 TY |
625 | } |
626 | ||
2b462638 BH |
627 | if (o2info_from_user(*oiff, req)) { |
628 | status = -EFAULT; | |
629 | goto out_free; | |
630 | } | |
d24a10b9 TY |
631 | /* |
632 | * chunksize from userspace should be power of 2. | |
633 | */ | |
634 | if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) || | |
635 | (!oiff->iff_chunksize)) { | |
636 | status = -EINVAL; | |
637 | goto bail; | |
638 | } | |
639 | ||
640 | if (o2info_coherent(&oiff->iff_req)) { | |
641 | gb_inode = ocfs2_get_system_file_inode(osb, type, | |
642 | OCFS2_INVALID_SLOT); | |
643 | if (!gb_inode) { | |
644 | mlog(ML_ERROR, "unable to get global_bitmap inode\n"); | |
645 | status = -EIO; | |
646 | goto bail; | |
647 | } | |
648 | } else { | |
649 | ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type, | |
650 | OCFS2_INVALID_SLOT); | |
651 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
652 | namebuf, | |
653 | strlen(namebuf), | |
654 | &blkno); | |
655 | if (status < 0) { | |
656 | status = -ENOENT; | |
657 | goto bail; | |
658 | } | |
659 | } | |
660 | ||
661 | status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff); | |
662 | if (status < 0) | |
663 | goto bail; | |
664 | ||
665 | o2info_set_request_filled(&oiff->iff_req); | |
666 | ||
7ebab453 WY |
667 | if (o2info_to_user(*oiff, req)) { |
668 | status = -EFAULT; | |
2b462638 | 669 | goto out_free; |
7ebab453 | 670 | } |
d24a10b9 TY |
671 | |
672 | status = 0; | |
673 | bail: | |
674 | if (status) | |
675 | o2info_set_request_error(&oiff->iff_req, req); | |
2b462638 | 676 | out_free: |
d24a10b9 | 677 | kfree(oiff); |
87f0d5c8 | 678 | out_err: |
ddee5cdb TY |
679 | return status; |
680 | } | |
681 | ||
c253ed1f FF |
682 | static int ocfs2_info_handle_unknown(struct inode *inode, |
683 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 684 | { |
ddee5cdb TY |
685 | struct ocfs2_info_request oir; |
686 | ||
687 | if (o2info_from_user(oir, req)) | |
2b462638 | 688 | return -EFAULT; |
ddee5cdb | 689 | |
8aa1fa36 | 690 | o2info_clear_request_filled(&oir); |
ddee5cdb TY |
691 | |
692 | if (o2info_to_user(oir, req)) | |
2b462638 | 693 | return -EFAULT; |
ddee5cdb | 694 | |
2b462638 | 695 | return 0; |
ddee5cdb TY |
696 | } |
697 | ||
698 | /* | |
699 | * Validate and distinguish OCFS2_IOC_INFO requests. | |
700 | * | |
701 | * - validate the magic number. | |
702 | * - distinguish different requests. | |
703 | * - validate size of different requests. | |
704 | */ | |
c253ed1f FF |
705 | static int ocfs2_info_handle_request(struct inode *inode, |
706 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
707 | { |
708 | int status = -EFAULT; | |
709 | struct ocfs2_info_request oir; | |
710 | ||
711 | if (o2info_from_user(oir, req)) | |
712 | goto bail; | |
713 | ||
714 | status = -EINVAL; | |
715 | if (oir.ir_magic != OCFS2_INFO_MAGIC) | |
716 | goto bail; | |
717 | ||
718 | switch (oir.ir_code) { | |
719 | case OCFS2_INFO_BLOCKSIZE: | |
720 | if (oir.ir_size == sizeof(struct ocfs2_info_blocksize)) | |
721 | status = ocfs2_info_handle_blocksize(inode, req); | |
722 | break; | |
723 | case OCFS2_INFO_CLUSTERSIZE: | |
724 | if (oir.ir_size == sizeof(struct ocfs2_info_clustersize)) | |
725 | status = ocfs2_info_handle_clustersize(inode, req); | |
726 | break; | |
727 | case OCFS2_INFO_MAXSLOTS: | |
728 | if (oir.ir_size == sizeof(struct ocfs2_info_maxslots)) | |
729 | status = ocfs2_info_handle_maxslots(inode, req); | |
730 | break; | |
731 | case OCFS2_INFO_LABEL: | |
732 | if (oir.ir_size == sizeof(struct ocfs2_info_label)) | |
733 | status = ocfs2_info_handle_label(inode, req); | |
734 | break; | |
735 | case OCFS2_INFO_UUID: | |
736 | if (oir.ir_size == sizeof(struct ocfs2_info_uuid)) | |
737 | status = ocfs2_info_handle_uuid(inode, req); | |
738 | break; | |
739 | case OCFS2_INFO_FS_FEATURES: | |
740 | if (oir.ir_size == sizeof(struct ocfs2_info_fs_features)) | |
741 | status = ocfs2_info_handle_fs_features(inode, req); | |
742 | break; | |
743 | case OCFS2_INFO_JOURNAL_SIZE: | |
744 | if (oir.ir_size == sizeof(struct ocfs2_info_journal_size)) | |
745 | status = ocfs2_info_handle_journal_size(inode, req); | |
746 | break; | |
3e5db17d TY |
747 | case OCFS2_INFO_FREEINODE: |
748 | if (oir.ir_size == sizeof(struct ocfs2_info_freeinode)) | |
749 | status = ocfs2_info_handle_freeinode(inode, req); | |
750 | break; | |
d24a10b9 TY |
751 | case OCFS2_INFO_FREEFRAG: |
752 | if (oir.ir_size == sizeof(struct ocfs2_info_freefrag)) | |
753 | status = ocfs2_info_handle_freefrag(inode, req); | |
754 | break; | |
ddee5cdb TY |
755 | default: |
756 | status = ocfs2_info_handle_unknown(inode, req); | |
757 | break; | |
758 | } | |
759 | ||
760 | bail: | |
761 | return status; | |
762 | } | |
763 | ||
c253ed1f FF |
764 | static int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx, |
765 | u64 *req_addr, int compat_flag) | |
ddee5cdb TY |
766 | { |
767 | int status = -EFAULT; | |
768 | u64 __user *bp = NULL; | |
769 | ||
770 | if (compat_flag) { | |
771 | #ifdef CONFIG_COMPAT | |
772 | /* | |
773 | * pointer bp stores the base address of a pointers array, | |
774 | * which collects all addresses of separate request. | |
775 | */ | |
776 | bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests); | |
777 | #else | |
778 | BUG(); | |
779 | #endif | |
780 | } else | |
781 | bp = (u64 __user *)(unsigned long)(info->oi_requests); | |
782 | ||
783 | if (o2info_from_user(*req_addr, bp + idx)) | |
784 | goto bail; | |
785 | ||
786 | status = 0; | |
787 | bail: | |
788 | return status; | |
789 | } | |
790 | ||
791 | /* | |
792 | * OCFS2_IOC_INFO handles an array of requests passed from userspace. | |
793 | * | |
794 | * ocfs2_info_handle() recevies a large info aggregation, grab and | |
795 | * validate the request count from header, then break it into small | |
796 | * pieces, later specific handlers can handle them one by one. | |
797 | * | |
798 | * Idea here is to make each separate request small enough to ensure | |
799 | * a better backward&forward compatibility, since a small piece of | |
800 | * request will be less likely to be broken if disk layout get changed. | |
801 | */ | |
c253ed1f FF |
802 | static int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, |
803 | int compat_flag) | |
ddee5cdb TY |
804 | { |
805 | int i, status = 0; | |
806 | u64 req_addr; | |
807 | struct ocfs2_info_request __user *reqp; | |
808 | ||
809 | if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) || | |
810 | (!info->oi_requests)) { | |
811 | status = -EINVAL; | |
812 | goto bail; | |
813 | } | |
814 | ||
815 | for (i = 0; i < info->oi_count; i++) { | |
816 | ||
817 | status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag); | |
818 | if (status) | |
819 | break; | |
820 | ||
f6a56903 | 821 | reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr; |
ddee5cdb TY |
822 | if (!reqp) { |
823 | status = -EINVAL; | |
824 | goto bail; | |
825 | } | |
826 | ||
827 | status = ocfs2_info_handle_request(inode, reqp); | |
828 | if (status) | |
829 | break; | |
830 | } | |
831 | ||
832 | bail: | |
833 | return status; | |
834 | } | |
835 | ||
c9ec1488 | 836 | long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ca4d147e | 837 | { |
496ad9aa | 838 | struct inode *inode = file_inode(filp); |
ca4d147e | 839 | unsigned int flags; |
d659072f | 840 | int new_clusters; |
ca4d147e | 841 | int status; |
b2580103 | 842 | struct ocfs2_space_resv sr; |
7909f2bf | 843 | struct ocfs2_new_group_input input; |
bd50873d | 844 | struct reflink_arguments args; |
f6a56903 AV |
845 | const char __user *old_path; |
846 | const char __user *new_path; | |
bd50873d | 847 | bool preserve; |
ddee5cdb | 848 | struct ocfs2_info info; |
f6a56903 | 849 | void __user *argp = (void __user *)arg; |
ca4d147e HP |
850 | |
851 | switch (cmd) { | |
852 | case OCFS2_IOC_GETFLAGS: | |
853 | status = ocfs2_get_inode_attr(inode, &flags); | |
854 | if (status < 0) | |
855 | return status; | |
856 | ||
857 | flags &= OCFS2_FL_VISIBLE; | |
858 | return put_user(flags, (int __user *) arg); | |
859 | case OCFS2_IOC_SETFLAGS: | |
860 | if (get_user(flags, (int __user *) arg)) | |
861 | return -EFAULT; | |
862 | ||
a561be71 | 863 | status = mnt_want_write_file(filp); |
42a74f20 DH |
864 | if (status) |
865 | return status; | |
866 | status = ocfs2_set_inode_attr(inode, flags, | |
ca4d147e | 867 | OCFS2_FL_MODIFIABLE); |
2a79f17e | 868 | mnt_drop_write_file(filp); |
42a74f20 | 869 | return status; |
b2580103 MF |
870 | case OCFS2_IOC_RESVSP: |
871 | case OCFS2_IOC_RESVSP64: | |
872 | case OCFS2_IOC_UNRESVSP: | |
873 | case OCFS2_IOC_UNRESVSP64: | |
874 | if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) | |
875 | return -EFAULT; | |
876 | ||
877 | return ocfs2_change_file_space(filp, cmd, &sr); | |
d659072f | 878 | case OCFS2_IOC_GROUP_EXTEND: |
0957f007 MF |
879 | if (!capable(CAP_SYS_RESOURCE)) |
880 | return -EPERM; | |
881 | ||
d659072f TM |
882 | if (get_user(new_clusters, (int __user *)arg)) |
883 | return -EFAULT; | |
884 | ||
fef6925c JK |
885 | status = mnt_want_write_file(filp); |
886 | if (status) | |
887 | return status; | |
888 | status = ocfs2_group_extend(inode, new_clusters); | |
889 | mnt_drop_write_file(filp); | |
890 | return status; | |
7909f2bf TM |
891 | case OCFS2_IOC_GROUP_ADD: |
892 | case OCFS2_IOC_GROUP_ADD64: | |
0957f007 MF |
893 | if (!capable(CAP_SYS_RESOURCE)) |
894 | return -EPERM; | |
895 | ||
7909f2bf TM |
896 | if (copy_from_user(&input, (int __user *) arg, sizeof(input))) |
897 | return -EFAULT; | |
898 | ||
fef6925c JK |
899 | status = mnt_want_write_file(filp); |
900 | if (status) | |
901 | return status; | |
902 | status = ocfs2_group_add(inode, &input); | |
903 | mnt_drop_write_file(filp); | |
904 | return status; | |
bd50873d | 905 | case OCFS2_IOC_REFLINK: |
f6a56903 | 906 | if (copy_from_user(&args, argp, sizeof(args))) |
bd50873d | 907 | return -EFAULT; |
f6a56903 AV |
908 | old_path = (const char __user *)(unsigned long)args.old_path; |
909 | new_path = (const char __user *)(unsigned long)args.new_path; | |
bd50873d TM |
910 | preserve = (args.preserve != 0); |
911 | ||
912 | return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); | |
ddee5cdb | 913 | case OCFS2_IOC_INFO: |
f6a56903 | 914 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
915 | return -EFAULT; |
916 | ||
917 | return ocfs2_info_handle(inode, &info, 0); | |
55e67872 TM |
918 | case FITRIM: |
919 | { | |
920 | struct super_block *sb = inode->i_sb; | |
19e8ac27 | 921 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
55e67872 TM |
922 | struct fstrim_range range; |
923 | int ret = 0; | |
924 | ||
925 | if (!capable(CAP_SYS_ADMIN)) | |
926 | return -EPERM; | |
927 | ||
19e8ac27 JL |
928 | if (!blk_queue_discard(q)) |
929 | return -EOPNOTSUPP; | |
930 | ||
f6a56903 | 931 | if (copy_from_user(&range, argp, sizeof(range))) |
55e67872 TM |
932 | return -EFAULT; |
933 | ||
1ba2212b JL |
934 | range.minlen = max_t(u64, q->limits.discard_granularity, |
935 | range.minlen); | |
55e67872 TM |
936 | ret = ocfs2_trim_fs(sb, &range); |
937 | if (ret < 0) | |
938 | return ret; | |
939 | ||
f6a56903 | 940 | if (copy_to_user(argp, &range, sizeof(range))) |
55e67872 TM |
941 | return -EFAULT; |
942 | ||
943 | return 0; | |
944 | } | |
53069d4e | 945 | case OCFS2_IOC_MOVE_EXT: |
f6a56903 | 946 | return ocfs2_ioctl_move_extents(filp, argp); |
ca4d147e HP |
947 | default: |
948 | return -ENOTTY; | |
949 | } | |
950 | } | |
951 | ||
586d232b MF |
952 | #ifdef CONFIG_COMPAT |
953 | long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
954 | { | |
34e6c59a TM |
955 | bool preserve; |
956 | struct reflink_arguments args; | |
496ad9aa | 957 | struct inode *inode = file_inode(file); |
ddee5cdb | 958 | struct ocfs2_info info; |
f6a56903 | 959 | void __user *argp = (void __user *)arg; |
34e6c59a | 960 | |
586d232b MF |
961 | switch (cmd) { |
962 | case OCFS2_IOC32_GETFLAGS: | |
963 | cmd = OCFS2_IOC_GETFLAGS; | |
964 | break; | |
965 | case OCFS2_IOC32_SETFLAGS: | |
966 | cmd = OCFS2_IOC_SETFLAGS; | |
967 | break; | |
b2580103 MF |
968 | case OCFS2_IOC_RESVSP: |
969 | case OCFS2_IOC_RESVSP64: | |
970 | case OCFS2_IOC_UNRESVSP: | |
971 | case OCFS2_IOC_UNRESVSP64: | |
d659072f | 972 | case OCFS2_IOC_GROUP_EXTEND: |
7909f2bf TM |
973 | case OCFS2_IOC_GROUP_ADD: |
974 | case OCFS2_IOC_GROUP_ADD64: | |
b2580103 | 975 | break; |
34e6c59a | 976 | case OCFS2_IOC_REFLINK: |
f6a56903 | 977 | if (copy_from_user(&args, argp, sizeof(args))) |
34e6c59a TM |
978 | return -EFAULT; |
979 | preserve = (args.preserve != 0); | |
980 | ||
981 | return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path), | |
982 | compat_ptr(args.new_path), preserve); | |
ddee5cdb | 983 | case OCFS2_IOC_INFO: |
f6a56903 | 984 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
985 | return -EFAULT; |
986 | ||
987 | return ocfs2_info_handle(inode, &info, 1); | |
53069d4e TY |
988 | case OCFS2_IOC_MOVE_EXT: |
989 | break; | |
586d232b MF |
990 | default: |
991 | return -ENOIOCTLCMD; | |
992 | } | |
993 | ||
c9ec1488 | 994 | return ocfs2_ioctl(file, cmd, arg); |
586d232b MF |
995 | } |
996 | #endif |