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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 | ||
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 | 138 | bail: |
5955102c | 139 | inode_unlock(inode); |
ca4d147e | 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 | 148 | { |
ddee5cdb TY |
149 | struct ocfs2_info_blocksize oib; |
150 | ||
151 | if (o2info_from_user(oib, req)) | |
2b462638 | 152 | return -EFAULT; |
ddee5cdb TY |
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)) | |
2b462638 | 159 | return -EFAULT; |
ddee5cdb | 160 | |
2b462638 | 161 | return 0; |
ddee5cdb TY |
162 | } |
163 | ||
c253ed1f FF |
164 | static int ocfs2_info_handle_clustersize(struct inode *inode, |
165 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 166 | { |
ddee5cdb TY |
167 | struct ocfs2_info_clustersize oic; |
168 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
169 | ||
170 | if (o2info_from_user(oic, req)) | |
2b462638 | 171 | return -EFAULT; |
ddee5cdb TY |
172 | |
173 | oic.ic_clustersize = osb->s_clustersize; | |
1936a267 | 174 | |
8aa1fa36 | 175 | o2info_set_request_filled(&oic.ic_req); |
ddee5cdb TY |
176 | |
177 | if (o2info_to_user(oic, req)) | |
2b462638 | 178 | return -EFAULT; |
ddee5cdb | 179 | |
2b462638 | 180 | return 0; |
ddee5cdb TY |
181 | } |
182 | ||
c253ed1f FF |
183 | static int ocfs2_info_handle_maxslots(struct inode *inode, |
184 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 185 | { |
ddee5cdb TY |
186 | struct ocfs2_info_maxslots oim; |
187 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
188 | ||
189 | if (o2info_from_user(oim, req)) | |
2b462638 | 190 | return -EFAULT; |
ddee5cdb TY |
191 | |
192 | oim.im_max_slots = osb->max_slots; | |
1936a267 | 193 | |
8aa1fa36 | 194 | o2info_set_request_filled(&oim.im_req); |
ddee5cdb TY |
195 | |
196 | if (o2info_to_user(oim, req)) | |
2b462638 | 197 | return -EFAULT; |
ddee5cdb | 198 | |
2b462638 | 199 | return 0; |
ddee5cdb TY |
200 | } |
201 | ||
c253ed1f FF |
202 | static int ocfs2_info_handle_label(struct inode *inode, |
203 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 204 | { |
ddee5cdb TY |
205 | struct ocfs2_info_label oil; |
206 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
207 | ||
208 | if (o2info_from_user(oil, req)) | |
2b462638 | 209 | return -EFAULT; |
ddee5cdb TY |
210 | |
211 | memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN); | |
1936a267 | 212 | |
8aa1fa36 | 213 | o2info_set_request_filled(&oil.il_req); |
ddee5cdb TY |
214 | |
215 | if (o2info_to_user(oil, req)) | |
2b462638 | 216 | return -EFAULT; |
ddee5cdb | 217 | |
2b462638 | 218 | return 0; |
ddee5cdb TY |
219 | } |
220 | ||
c253ed1f FF |
221 | static int ocfs2_info_handle_uuid(struct inode *inode, |
222 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 223 | { |
ddee5cdb TY |
224 | struct ocfs2_info_uuid oiu; |
225 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
226 | ||
227 | if (o2info_from_user(oiu, req)) | |
2b462638 | 228 | return -EFAULT; |
ddee5cdb TY |
229 | |
230 | memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1); | |
1936a267 | 231 | |
8aa1fa36 | 232 | o2info_set_request_filled(&oiu.iu_req); |
ddee5cdb TY |
233 | |
234 | if (o2info_to_user(oiu, req)) | |
2b462638 | 235 | return -EFAULT; |
ddee5cdb | 236 | |
2b462638 | 237 | return 0; |
ddee5cdb TY |
238 | } |
239 | ||
c253ed1f FF |
240 | static int ocfs2_info_handle_fs_features(struct inode *inode, |
241 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 242 | { |
ddee5cdb TY |
243 | struct ocfs2_info_fs_features oif; |
244 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
245 | ||
246 | if (o2info_from_user(oif, req)) | |
2b462638 | 247 | return -EFAULT; |
ddee5cdb TY |
248 | |
249 | oif.if_compat_features = osb->s_feature_compat; | |
250 | oif.if_incompat_features = osb->s_feature_incompat; | |
251 | oif.if_ro_compat_features = osb->s_feature_ro_compat; | |
1936a267 | 252 | |
8aa1fa36 | 253 | o2info_set_request_filled(&oif.if_req); |
ddee5cdb TY |
254 | |
255 | if (o2info_to_user(oif, req)) | |
2b462638 | 256 | return -EFAULT; |
ddee5cdb | 257 | |
2b462638 | 258 | return 0; |
ddee5cdb TY |
259 | } |
260 | ||
c253ed1f FF |
261 | static int ocfs2_info_handle_journal_size(struct inode *inode, |
262 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 263 | { |
ddee5cdb TY |
264 | struct ocfs2_info_journal_size oij; |
265 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
266 | ||
267 | if (o2info_from_user(oij, req)) | |
2b462638 | 268 | return -EFAULT; |
ddee5cdb | 269 | |
f17c20dd | 270 | oij.ij_journal_size = i_size_read(osb->journal->j_inode); |
ddee5cdb | 271 | |
8aa1fa36 | 272 | o2info_set_request_filled(&oij.ij_req); |
ddee5cdb TY |
273 | |
274 | if (o2info_to_user(oij, req)) | |
2b462638 | 275 | return -EFAULT; |
ddee5cdb | 276 | |
2b462638 | 277 | return 0; |
ddee5cdb TY |
278 | } |
279 | ||
c253ed1f FF |
280 | static int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb, |
281 | struct inode *inode_alloc, u64 blkno, | |
282 | struct ocfs2_info_freeinode *fi, | |
283 | u32 slot) | |
3e5db17d TY |
284 | { |
285 | int status = 0, unlock = 0; | |
286 | ||
287 | struct buffer_head *bh = NULL; | |
288 | struct ocfs2_dinode *dinode_alloc = NULL; | |
289 | ||
290 | if (inode_alloc) | |
5955102c | 291 | inode_lock(inode_alloc); |
3e5db17d TY |
292 | |
293 | if (o2info_coherent(&fi->ifi_req)) { | |
294 | status = ocfs2_inode_lock(inode_alloc, &bh, 0); | |
295 | if (status < 0) { | |
296 | mlog_errno(status); | |
297 | goto bail; | |
298 | } | |
299 | unlock = 1; | |
300 | } else { | |
301 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
302 | if (status < 0) { | |
303 | mlog_errno(status); | |
304 | goto bail; | |
305 | } | |
306 | } | |
307 | ||
308 | dinode_alloc = (struct ocfs2_dinode *)bh->b_data; | |
309 | ||
310 | fi->ifi_stat[slot].lfi_total = | |
311 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total); | |
312 | fi->ifi_stat[slot].lfi_free = | |
313 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) - | |
314 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_used); | |
315 | ||
316 | bail: | |
317 | if (unlock) | |
318 | ocfs2_inode_unlock(inode_alloc, 0); | |
319 | ||
320 | if (inode_alloc) | |
5955102c | 321 | inode_unlock(inode_alloc); |
3e5db17d TY |
322 | |
323 | brelse(bh); | |
324 | ||
325 | return status; | |
326 | } | |
327 | ||
c253ed1f FF |
328 | static int ocfs2_info_handle_freeinode(struct inode *inode, |
329 | struct ocfs2_info_request __user *req) | |
3e5db17d TY |
330 | { |
331 | u32 i; | |
332 | u64 blkno = -1; | |
333 | char namebuf[40]; | |
2b462638 | 334 | int status, type = INODE_ALLOC_SYSTEM_INODE; |
3e5db17d TY |
335 | struct ocfs2_info_freeinode *oifi = NULL; |
336 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
337 | struct inode *inode_alloc = NULL; | |
338 | ||
339 | oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL); | |
340 | if (!oifi) { | |
341 | status = -ENOMEM; | |
342 | mlog_errno(status); | |
87f0d5c8 | 343 | goto out_err; |
3e5db17d TY |
344 | } |
345 | ||
2b462638 BH |
346 | if (o2info_from_user(*oifi, req)) { |
347 | status = -EFAULT; | |
348 | goto out_free; | |
349 | } | |
3e5db17d TY |
350 | |
351 | oifi->ifi_slotnum = osb->max_slots; | |
352 | ||
353 | for (i = 0; i < oifi->ifi_slotnum; i++) { | |
354 | if (o2info_coherent(&oifi->ifi_req)) { | |
355 | inode_alloc = ocfs2_get_system_file_inode(osb, type, i); | |
356 | if (!inode_alloc) { | |
357 | mlog(ML_ERROR, "unable to get alloc inode in " | |
358 | "slot %u\n", i); | |
359 | status = -EIO; | |
360 | goto bail; | |
361 | } | |
362 | } else { | |
363 | ocfs2_sprintf_system_inode_name(namebuf, | |
364 | sizeof(namebuf), | |
365 | type, i); | |
366 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
367 | namebuf, | |
368 | strlen(namebuf), | |
369 | &blkno); | |
370 | if (status < 0) { | |
371 | status = -ENOENT; | |
372 | goto bail; | |
373 | } | |
374 | } | |
375 | ||
376 | status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i); | |
3e5db17d TY |
377 | |
378 | iput(inode_alloc); | |
379 | inode_alloc = NULL; | |
7dc3e839 | 380 | |
381 | if (status < 0) | |
382 | goto bail; | |
3e5db17d TY |
383 | } |
384 | ||
385 | o2info_set_request_filled(&oifi->ifi_req); | |
386 | ||
2b462638 BH |
387 | if (o2info_to_user(*oifi, req)) { |
388 | status = -EFAULT; | |
389 | goto out_free; | |
390 | } | |
3e5db17d TY |
391 | |
392 | status = 0; | |
393 | bail: | |
394 | if (status) | |
395 | o2info_set_request_error(&oifi->ifi_req, req); | |
2b462638 | 396 | out_free: |
3e5db17d | 397 | kfree(oifi); |
87f0d5c8 | 398 | out_err: |
3e5db17d TY |
399 | return status; |
400 | } | |
401 | ||
d24a10b9 TY |
402 | static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist, |
403 | unsigned int chunksize) | |
404 | { | |
731a40fa | 405 | u32 index; |
d24a10b9 TY |
406 | |
407 | index = __ilog2_u32(chunksize); | |
408 | if (index >= OCFS2_INFO_MAX_HIST) | |
409 | index = OCFS2_INFO_MAX_HIST - 1; | |
410 | ||
411 | hist->fc_chunks[index]++; | |
412 | hist->fc_clusters[index] += chunksize; | |
413 | } | |
414 | ||
415 | static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats, | |
416 | unsigned int chunksize) | |
417 | { | |
418 | if (chunksize > stats->ffs_max) | |
419 | stats->ffs_max = chunksize; | |
420 | ||
421 | if (chunksize < stats->ffs_min) | |
422 | stats->ffs_min = chunksize; | |
423 | ||
424 | stats->ffs_avg += chunksize; | |
425 | stats->ffs_free_chunks_real++; | |
426 | } | |
427 | ||
c253ed1f FF |
428 | static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg, |
429 | unsigned int chunksize) | |
d24a10b9 TY |
430 | { |
431 | o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize); | |
432 | o2ffg_update_stats(&(ffg->iff_ffs), chunksize); | |
433 | } | |
434 | ||
c253ed1f FF |
435 | static int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb, |
436 | struct inode *gb_inode, | |
437 | struct ocfs2_dinode *gb_dinode, | |
438 | struct ocfs2_chain_rec *rec, | |
439 | struct ocfs2_info_freefrag *ffg, | |
440 | u32 chunks_in_group) | |
d24a10b9 TY |
441 | { |
442 | int status = 0, used; | |
443 | u64 blkno; | |
444 | ||
445 | struct buffer_head *bh = NULL; | |
446 | struct ocfs2_group_desc *bg = NULL; | |
447 | ||
448 | unsigned int max_bits, num_clusters; | |
449 | unsigned int offset = 0, cluster, chunk; | |
450 | unsigned int chunk_free, last_chunksize = 0; | |
451 | ||
452 | if (!le32_to_cpu(rec->c_free)) | |
453 | goto bail; | |
454 | ||
455 | do { | |
456 | if (!bg) | |
457 | blkno = le64_to_cpu(rec->c_blkno); | |
458 | else | |
459 | blkno = le64_to_cpu(bg->bg_next_group); | |
460 | ||
461 | if (bh) { | |
462 | brelse(bh); | |
463 | bh = NULL; | |
464 | } | |
465 | ||
466 | if (o2info_coherent(&ffg->iff_req)) | |
467 | status = ocfs2_read_group_descriptor(gb_inode, | |
468 | gb_dinode, | |
469 | blkno, &bh); | |
470 | else | |
471 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
472 | ||
473 | if (status < 0) { | |
474 | mlog(ML_ERROR, "Can't read the group descriptor # " | |
475 | "%llu from device.", (unsigned long long)blkno); | |
476 | status = -EIO; | |
477 | goto bail; | |
478 | } | |
479 | ||
480 | bg = (struct ocfs2_group_desc *)bh->b_data; | |
481 | ||
482 | if (!le16_to_cpu(bg->bg_free_bits_count)) | |
483 | continue; | |
484 | ||
485 | max_bits = le16_to_cpu(bg->bg_bits); | |
486 | offset = 0; | |
487 | ||
488 | for (chunk = 0; chunk < chunks_in_group; chunk++) { | |
489 | /* | |
490 | * last chunk may be not an entire one. | |
491 | */ | |
492 | if ((offset + ffg->iff_chunksize) > max_bits) | |
493 | num_clusters = max_bits - offset; | |
494 | else | |
495 | num_clusters = ffg->iff_chunksize; | |
496 | ||
497 | chunk_free = 0; | |
498 | for (cluster = 0; cluster < num_clusters; cluster++) { | |
499 | used = ocfs2_test_bit(offset, | |
500 | (unsigned long *)bg->bg_bitmap); | |
501 | /* | |
502 | * - chunk_free counts free clusters in #N chunk. | |
503 | * - last_chunksize records the size(in) clusters | |
504 | * for the last real free chunk being counted. | |
505 | */ | |
506 | if (!used) { | |
507 | last_chunksize++; | |
508 | chunk_free++; | |
509 | } | |
510 | ||
511 | if (used && last_chunksize) { | |
512 | ocfs2_info_update_ffg(ffg, | |
513 | last_chunksize); | |
514 | last_chunksize = 0; | |
515 | } | |
516 | ||
517 | offset++; | |
518 | } | |
519 | ||
520 | if (chunk_free == ffg->iff_chunksize) | |
521 | ffg->iff_ffs.ffs_free_chunks++; | |
522 | } | |
523 | ||
524 | /* | |
525 | * need to update the info for last free chunk. | |
526 | */ | |
527 | if (last_chunksize) | |
528 | ocfs2_info_update_ffg(ffg, last_chunksize); | |
529 | ||
530 | } while (le64_to_cpu(bg->bg_next_group)); | |
531 | ||
532 | bail: | |
533 | brelse(bh); | |
534 | ||
535 | return status; | |
536 | } | |
537 | ||
c253ed1f FF |
538 | static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb, |
539 | struct inode *gb_inode, u64 blkno, | |
540 | struct ocfs2_info_freefrag *ffg) | |
d24a10b9 TY |
541 | { |
542 | u32 chunks_in_group; | |
543 | int status = 0, unlock = 0, i; | |
544 | ||
545 | struct buffer_head *bh = NULL; | |
546 | struct ocfs2_chain_list *cl = NULL; | |
547 | struct ocfs2_chain_rec *rec = NULL; | |
548 | struct ocfs2_dinode *gb_dinode = NULL; | |
549 | ||
550 | if (gb_inode) | |
5955102c | 551 | inode_lock(gb_inode); |
d24a10b9 TY |
552 | |
553 | if (o2info_coherent(&ffg->iff_req)) { | |
554 | status = ocfs2_inode_lock(gb_inode, &bh, 0); | |
555 | if (status < 0) { | |
556 | mlog_errno(status); | |
557 | goto bail; | |
558 | } | |
559 | unlock = 1; | |
560 | } else { | |
561 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
562 | if (status < 0) { | |
563 | mlog_errno(status); | |
564 | goto bail; | |
565 | } | |
566 | } | |
567 | ||
568 | gb_dinode = (struct ocfs2_dinode *)bh->b_data; | |
569 | cl = &(gb_dinode->id2.i_chain); | |
570 | ||
571 | /* | |
572 | * Chunksize(in) clusters from userspace should be | |
573 | * less than clusters in a group. | |
574 | */ | |
575 | if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) { | |
576 | status = -EINVAL; | |
577 | goto bail; | |
578 | } | |
579 | ||
580 | memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats)); | |
581 | ||
582 | ffg->iff_ffs.ffs_min = ~0U; | |
583 | ffg->iff_ffs.ffs_clusters = | |
584 | le32_to_cpu(gb_dinode->id1.bitmap1.i_total); | |
585 | ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters - | |
586 | le32_to_cpu(gb_dinode->id1.bitmap1.i_used); | |
587 | ||
588 | chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1; | |
589 | ||
590 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) { | |
591 | rec = &(cl->cl_recs[i]); | |
592 | status = ocfs2_info_freefrag_scan_chain(osb, gb_inode, | |
593 | gb_dinode, | |
594 | rec, ffg, | |
595 | chunks_in_group); | |
596 | if (status) | |
597 | goto bail; | |
598 | } | |
599 | ||
600 | if (ffg->iff_ffs.ffs_free_chunks_real) | |
601 | ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg / | |
602 | ffg->iff_ffs.ffs_free_chunks_real); | |
603 | bail: | |
604 | if (unlock) | |
605 | ocfs2_inode_unlock(gb_inode, 0); | |
606 | ||
607 | if (gb_inode) | |
5955102c | 608 | inode_unlock(gb_inode); |
d24a10b9 | 609 | |
72865d92 | 610 | iput(gb_inode); |
d24a10b9 TY |
611 | brelse(bh); |
612 | ||
613 | return status; | |
614 | } | |
615 | ||
c253ed1f FF |
616 | static int ocfs2_info_handle_freefrag(struct inode *inode, |
617 | struct ocfs2_info_request __user *req) | |
d24a10b9 TY |
618 | { |
619 | u64 blkno = -1; | |
620 | char namebuf[40]; | |
2b462638 | 621 | int status, type = GLOBAL_BITMAP_SYSTEM_INODE; |
d24a10b9 TY |
622 | |
623 | struct ocfs2_info_freefrag *oiff; | |
624 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
625 | struct inode *gb_inode = NULL; | |
626 | ||
627 | oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL); | |
628 | if (!oiff) { | |
629 | status = -ENOMEM; | |
630 | mlog_errno(status); | |
87f0d5c8 | 631 | goto out_err; |
d24a10b9 TY |
632 | } |
633 | ||
2b462638 BH |
634 | if (o2info_from_user(*oiff, req)) { |
635 | status = -EFAULT; | |
636 | goto out_free; | |
637 | } | |
d24a10b9 TY |
638 | /* |
639 | * chunksize from userspace should be power of 2. | |
640 | */ | |
641 | if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) || | |
642 | (!oiff->iff_chunksize)) { | |
643 | status = -EINVAL; | |
644 | goto bail; | |
645 | } | |
646 | ||
647 | if (o2info_coherent(&oiff->iff_req)) { | |
648 | gb_inode = ocfs2_get_system_file_inode(osb, type, | |
649 | OCFS2_INVALID_SLOT); | |
650 | if (!gb_inode) { | |
651 | mlog(ML_ERROR, "unable to get global_bitmap inode\n"); | |
652 | status = -EIO; | |
653 | goto bail; | |
654 | } | |
655 | } else { | |
656 | ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type, | |
657 | OCFS2_INVALID_SLOT); | |
658 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
659 | namebuf, | |
660 | strlen(namebuf), | |
661 | &blkno); | |
662 | if (status < 0) { | |
663 | status = -ENOENT; | |
664 | goto bail; | |
665 | } | |
666 | } | |
667 | ||
668 | status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff); | |
669 | if (status < 0) | |
670 | goto bail; | |
671 | ||
672 | o2info_set_request_filled(&oiff->iff_req); | |
673 | ||
7ebab453 WY |
674 | if (o2info_to_user(*oiff, req)) { |
675 | status = -EFAULT; | |
2b462638 | 676 | goto out_free; |
7ebab453 | 677 | } |
d24a10b9 TY |
678 | |
679 | status = 0; | |
680 | bail: | |
681 | if (status) | |
682 | o2info_set_request_error(&oiff->iff_req, req); | |
2b462638 | 683 | out_free: |
d24a10b9 | 684 | kfree(oiff); |
87f0d5c8 | 685 | out_err: |
ddee5cdb TY |
686 | return status; |
687 | } | |
688 | ||
c253ed1f FF |
689 | static int ocfs2_info_handle_unknown(struct inode *inode, |
690 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 691 | { |
ddee5cdb TY |
692 | struct ocfs2_info_request oir; |
693 | ||
694 | if (o2info_from_user(oir, req)) | |
2b462638 | 695 | return -EFAULT; |
ddee5cdb | 696 | |
8aa1fa36 | 697 | o2info_clear_request_filled(&oir); |
ddee5cdb TY |
698 | |
699 | if (o2info_to_user(oir, req)) | |
2b462638 | 700 | return -EFAULT; |
ddee5cdb | 701 | |
2b462638 | 702 | return 0; |
ddee5cdb TY |
703 | } |
704 | ||
705 | /* | |
706 | * Validate and distinguish OCFS2_IOC_INFO requests. | |
707 | * | |
708 | * - validate the magic number. | |
709 | * - distinguish different requests. | |
710 | * - validate size of different requests. | |
711 | */ | |
c253ed1f FF |
712 | static int ocfs2_info_handle_request(struct inode *inode, |
713 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
714 | { |
715 | int status = -EFAULT; | |
716 | struct ocfs2_info_request oir; | |
717 | ||
718 | if (o2info_from_user(oir, req)) | |
719 | goto bail; | |
720 | ||
721 | status = -EINVAL; | |
722 | if (oir.ir_magic != OCFS2_INFO_MAGIC) | |
723 | goto bail; | |
724 | ||
725 | switch (oir.ir_code) { | |
726 | case OCFS2_INFO_BLOCKSIZE: | |
727 | if (oir.ir_size == sizeof(struct ocfs2_info_blocksize)) | |
728 | status = ocfs2_info_handle_blocksize(inode, req); | |
729 | break; | |
730 | case OCFS2_INFO_CLUSTERSIZE: | |
731 | if (oir.ir_size == sizeof(struct ocfs2_info_clustersize)) | |
732 | status = ocfs2_info_handle_clustersize(inode, req); | |
733 | break; | |
734 | case OCFS2_INFO_MAXSLOTS: | |
735 | if (oir.ir_size == sizeof(struct ocfs2_info_maxslots)) | |
736 | status = ocfs2_info_handle_maxslots(inode, req); | |
737 | break; | |
738 | case OCFS2_INFO_LABEL: | |
739 | if (oir.ir_size == sizeof(struct ocfs2_info_label)) | |
740 | status = ocfs2_info_handle_label(inode, req); | |
741 | break; | |
742 | case OCFS2_INFO_UUID: | |
743 | if (oir.ir_size == sizeof(struct ocfs2_info_uuid)) | |
744 | status = ocfs2_info_handle_uuid(inode, req); | |
745 | break; | |
746 | case OCFS2_INFO_FS_FEATURES: | |
747 | if (oir.ir_size == sizeof(struct ocfs2_info_fs_features)) | |
748 | status = ocfs2_info_handle_fs_features(inode, req); | |
749 | break; | |
750 | case OCFS2_INFO_JOURNAL_SIZE: | |
751 | if (oir.ir_size == sizeof(struct ocfs2_info_journal_size)) | |
752 | status = ocfs2_info_handle_journal_size(inode, req); | |
753 | break; | |
3e5db17d TY |
754 | case OCFS2_INFO_FREEINODE: |
755 | if (oir.ir_size == sizeof(struct ocfs2_info_freeinode)) | |
756 | status = ocfs2_info_handle_freeinode(inode, req); | |
757 | break; | |
d24a10b9 TY |
758 | case OCFS2_INFO_FREEFRAG: |
759 | if (oir.ir_size == sizeof(struct ocfs2_info_freefrag)) | |
760 | status = ocfs2_info_handle_freefrag(inode, req); | |
761 | break; | |
ddee5cdb TY |
762 | default: |
763 | status = ocfs2_info_handle_unknown(inode, req); | |
764 | break; | |
765 | } | |
766 | ||
767 | bail: | |
768 | return status; | |
769 | } | |
770 | ||
c253ed1f FF |
771 | static int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx, |
772 | u64 *req_addr, int compat_flag) | |
ddee5cdb TY |
773 | { |
774 | int status = -EFAULT; | |
775 | u64 __user *bp = NULL; | |
776 | ||
777 | if (compat_flag) { | |
778 | #ifdef CONFIG_COMPAT | |
779 | /* | |
780 | * pointer bp stores the base address of a pointers array, | |
781 | * which collects all addresses of separate request. | |
782 | */ | |
783 | bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests); | |
784 | #else | |
785 | BUG(); | |
786 | #endif | |
787 | } else | |
788 | bp = (u64 __user *)(unsigned long)(info->oi_requests); | |
789 | ||
790 | if (o2info_from_user(*req_addr, bp + idx)) | |
791 | goto bail; | |
792 | ||
793 | status = 0; | |
794 | bail: | |
795 | return status; | |
796 | } | |
797 | ||
798 | /* | |
799 | * OCFS2_IOC_INFO handles an array of requests passed from userspace. | |
800 | * | |
801 | * ocfs2_info_handle() recevies a large info aggregation, grab and | |
802 | * validate the request count from header, then break it into small | |
803 | * pieces, later specific handlers can handle them one by one. | |
804 | * | |
805 | * Idea here is to make each separate request small enough to ensure | |
806 | * a better backward&forward compatibility, since a small piece of | |
807 | * request will be less likely to be broken if disk layout get changed. | |
808 | */ | |
c253ed1f FF |
809 | static int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, |
810 | int compat_flag) | |
ddee5cdb TY |
811 | { |
812 | int i, status = 0; | |
813 | u64 req_addr; | |
814 | struct ocfs2_info_request __user *reqp; | |
815 | ||
816 | if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) || | |
817 | (!info->oi_requests)) { | |
818 | status = -EINVAL; | |
819 | goto bail; | |
820 | } | |
821 | ||
822 | for (i = 0; i < info->oi_count; i++) { | |
823 | ||
824 | status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag); | |
825 | if (status) | |
826 | break; | |
827 | ||
f6a56903 | 828 | reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr; |
ddee5cdb TY |
829 | if (!reqp) { |
830 | status = -EINVAL; | |
831 | goto bail; | |
832 | } | |
833 | ||
834 | status = ocfs2_info_handle_request(inode, reqp); | |
835 | if (status) | |
836 | break; | |
837 | } | |
838 | ||
839 | bail: | |
840 | return status; | |
841 | } | |
842 | ||
c9ec1488 | 843 | long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ca4d147e | 844 | { |
496ad9aa | 845 | struct inode *inode = file_inode(filp); |
ca4d147e | 846 | unsigned int flags; |
d659072f | 847 | int new_clusters; |
ca4d147e | 848 | int status; |
b2580103 | 849 | struct ocfs2_space_resv sr; |
7909f2bf | 850 | struct ocfs2_new_group_input input; |
bd50873d | 851 | struct reflink_arguments args; |
f6a56903 AV |
852 | const char __user *old_path; |
853 | const char __user *new_path; | |
bd50873d | 854 | bool preserve; |
ddee5cdb | 855 | struct ocfs2_info info; |
f6a56903 | 856 | void __user *argp = (void __user *)arg; |
ca4d147e HP |
857 | |
858 | switch (cmd) { | |
859 | case OCFS2_IOC_GETFLAGS: | |
860 | status = ocfs2_get_inode_attr(inode, &flags); | |
861 | if (status < 0) | |
862 | return status; | |
863 | ||
864 | flags &= OCFS2_FL_VISIBLE; | |
865 | return put_user(flags, (int __user *) arg); | |
866 | case OCFS2_IOC_SETFLAGS: | |
867 | if (get_user(flags, (int __user *) arg)) | |
868 | return -EFAULT; | |
869 | ||
a561be71 | 870 | status = mnt_want_write_file(filp); |
42a74f20 DH |
871 | if (status) |
872 | return status; | |
873 | status = ocfs2_set_inode_attr(inode, flags, | |
ca4d147e | 874 | OCFS2_FL_MODIFIABLE); |
2a79f17e | 875 | mnt_drop_write_file(filp); |
42a74f20 | 876 | return status; |
b2580103 MF |
877 | case OCFS2_IOC_RESVSP: |
878 | case OCFS2_IOC_RESVSP64: | |
879 | case OCFS2_IOC_UNRESVSP: | |
880 | case OCFS2_IOC_UNRESVSP64: | |
881 | if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) | |
882 | return -EFAULT; | |
883 | ||
884 | return ocfs2_change_file_space(filp, cmd, &sr); | |
d659072f | 885 | case OCFS2_IOC_GROUP_EXTEND: |
0957f007 MF |
886 | if (!capable(CAP_SYS_RESOURCE)) |
887 | return -EPERM; | |
888 | ||
d659072f TM |
889 | if (get_user(new_clusters, (int __user *)arg)) |
890 | return -EFAULT; | |
891 | ||
fef6925c JK |
892 | status = mnt_want_write_file(filp); |
893 | if (status) | |
894 | return status; | |
895 | status = ocfs2_group_extend(inode, new_clusters); | |
896 | mnt_drop_write_file(filp); | |
897 | return status; | |
7909f2bf TM |
898 | case OCFS2_IOC_GROUP_ADD: |
899 | case OCFS2_IOC_GROUP_ADD64: | |
0957f007 MF |
900 | if (!capable(CAP_SYS_RESOURCE)) |
901 | return -EPERM; | |
902 | ||
7909f2bf TM |
903 | if (copy_from_user(&input, (int __user *) arg, sizeof(input))) |
904 | return -EFAULT; | |
905 | ||
fef6925c JK |
906 | status = mnt_want_write_file(filp); |
907 | if (status) | |
908 | return status; | |
909 | status = ocfs2_group_add(inode, &input); | |
910 | mnt_drop_write_file(filp); | |
911 | return status; | |
bd50873d | 912 | case OCFS2_IOC_REFLINK: |
f6a56903 | 913 | if (copy_from_user(&args, argp, sizeof(args))) |
bd50873d | 914 | return -EFAULT; |
f6a56903 AV |
915 | old_path = (const char __user *)(unsigned long)args.old_path; |
916 | new_path = (const char __user *)(unsigned long)args.new_path; | |
bd50873d TM |
917 | preserve = (args.preserve != 0); |
918 | ||
919 | return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); | |
ddee5cdb | 920 | case OCFS2_IOC_INFO: |
f6a56903 | 921 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
922 | return -EFAULT; |
923 | ||
924 | return ocfs2_info_handle(inode, &info, 0); | |
55e67872 TM |
925 | case FITRIM: |
926 | { | |
927 | struct super_block *sb = inode->i_sb; | |
19e8ac27 | 928 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
55e67872 TM |
929 | struct fstrim_range range; |
930 | int ret = 0; | |
931 | ||
932 | if (!capable(CAP_SYS_ADMIN)) | |
933 | return -EPERM; | |
934 | ||
19e8ac27 JL |
935 | if (!blk_queue_discard(q)) |
936 | return -EOPNOTSUPP; | |
937 | ||
f6a56903 | 938 | if (copy_from_user(&range, argp, sizeof(range))) |
55e67872 TM |
939 | return -EFAULT; |
940 | ||
1ba2212b JL |
941 | range.minlen = max_t(u64, q->limits.discard_granularity, |
942 | range.minlen); | |
55e67872 TM |
943 | ret = ocfs2_trim_fs(sb, &range); |
944 | if (ret < 0) | |
945 | return ret; | |
946 | ||
f6a56903 | 947 | if (copy_to_user(argp, &range, sizeof(range))) |
55e67872 TM |
948 | return -EFAULT; |
949 | ||
950 | return 0; | |
951 | } | |
53069d4e | 952 | case OCFS2_IOC_MOVE_EXT: |
f6a56903 | 953 | return ocfs2_ioctl_move_extents(filp, argp); |
ca4d147e HP |
954 | default: |
955 | return -ENOTTY; | |
956 | } | |
957 | } | |
958 | ||
586d232b MF |
959 | #ifdef CONFIG_COMPAT |
960 | long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
961 | { | |
34e6c59a TM |
962 | bool preserve; |
963 | struct reflink_arguments args; | |
496ad9aa | 964 | struct inode *inode = file_inode(file); |
ddee5cdb | 965 | struct ocfs2_info info; |
f6a56903 | 966 | void __user *argp = (void __user *)arg; |
34e6c59a | 967 | |
586d232b MF |
968 | switch (cmd) { |
969 | case OCFS2_IOC32_GETFLAGS: | |
970 | cmd = OCFS2_IOC_GETFLAGS; | |
971 | break; | |
972 | case OCFS2_IOC32_SETFLAGS: | |
973 | cmd = OCFS2_IOC_SETFLAGS; | |
974 | break; | |
b2580103 MF |
975 | case OCFS2_IOC_RESVSP: |
976 | case OCFS2_IOC_RESVSP64: | |
977 | case OCFS2_IOC_UNRESVSP: | |
978 | case OCFS2_IOC_UNRESVSP64: | |
d659072f | 979 | case OCFS2_IOC_GROUP_EXTEND: |
7909f2bf TM |
980 | case OCFS2_IOC_GROUP_ADD: |
981 | case OCFS2_IOC_GROUP_ADD64: | |
b2580103 | 982 | break; |
34e6c59a | 983 | case OCFS2_IOC_REFLINK: |
f6a56903 | 984 | if (copy_from_user(&args, argp, sizeof(args))) |
34e6c59a TM |
985 | return -EFAULT; |
986 | preserve = (args.preserve != 0); | |
987 | ||
988 | return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path), | |
989 | compat_ptr(args.new_path), preserve); | |
ddee5cdb | 990 | case OCFS2_IOC_INFO: |
f6a56903 | 991 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
992 | return -EFAULT; |
993 | ||
994 | return ocfs2_info_handle(inode, &info, 1); | |
53069d4e TY |
995 | case OCFS2_IOC_MOVE_EXT: |
996 | break; | |
586d232b MF |
997 | default: |
998 | return -ENOIOCTLCMD; | |
999 | } | |
1000 | ||
c9ec1488 | 1001 | return ocfs2_ioctl(file, cmd, arg); |
586d232b MF |
1002 | } |
1003 | #endif |