Commit | Line | Data |
---|---|---|
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> |
2b5f52c5 | 13 | #include <linux/fileattr.h> |
ca4d147e | 14 | |
ca4d147e HP |
15 | #include <cluster/masklog.h> |
16 | ||
17 | #include "ocfs2.h" | |
18 | #include "alloc.h" | |
19 | #include "dlmglue.h" | |
b2580103 | 20 | #include "file.h" |
ca4d147e HP |
21 | #include "inode.h" |
22 | #include "journal.h" | |
23 | ||
24 | #include "ocfs2_fs.h" | |
2d562518 | 25 | #include "ioctl.h" |
d659072f | 26 | #include "resize.h" |
bd50873d | 27 | #include "refcounttree.h" |
3e5db17d TY |
28 | #include "sysfile.h" |
29 | #include "dir.h" | |
30 | #include "buffer_head_io.h" | |
d24a10b9 | 31 | #include "suballoc.h" |
53069d4e | 32 | #include "move_extents.h" |
2d562518 | 33 | |
ddee5cdb TY |
34 | #define o2info_from_user(a, b) \ |
35 | copy_from_user(&(a), (b), sizeof(a)) | |
36 | #define o2info_to_user(a, b) \ | |
37 | copy_to_user((typeof(a) __user *)b, &(a), sizeof(a)) | |
38 | ||
39 | /* | |
2b462638 BH |
40 | * This is just a best-effort to tell userspace that this request |
41 | * caused the error. | |
ddee5cdb | 42 | */ |
8aa1fa36 | 43 | static inline void o2info_set_request_error(struct ocfs2_info_request *kreq, |
ddee5cdb TY |
44 | struct ocfs2_info_request __user *req) |
45 | { | |
46 | kreq->ir_flags |= OCFS2_INFO_FL_ERROR; | |
47 | (void)put_user(kreq->ir_flags, (__u32 __user *)&(req->ir_flags)); | |
48 | } | |
49 | ||
8aa1fa36 | 50 | static inline void o2info_set_request_filled(struct ocfs2_info_request *req) |
1936a267 TY |
51 | { |
52 | req->ir_flags |= OCFS2_INFO_FL_FILLED; | |
53 | } | |
54 | ||
8aa1fa36 | 55 | static inline void o2info_clear_request_filled(struct ocfs2_info_request *req) |
1936a267 TY |
56 | { |
57 | req->ir_flags &= ~OCFS2_INFO_FL_FILLED; | |
58 | } | |
59 | ||
3e5db17d TY |
60 | static inline int o2info_coherent(struct ocfs2_info_request *req) |
61 | { | |
62 | return (!(req->ir_flags & OCFS2_INFO_FL_NON_COHERENT)); | |
63 | } | |
1936a267 | 64 | |
2b5f52c5 | 65 | int ocfs2_fileattr_get(struct dentry *dentry, struct fileattr *fa) |
ca4d147e | 66 | { |
2b5f52c5 MS |
67 | struct inode *inode = d_inode(dentry); |
68 | unsigned int flags; | |
ca4d147e HP |
69 | int status; |
70 | ||
e63aecb6 | 71 | status = ocfs2_inode_lock(inode, NULL, 0); |
ca4d147e HP |
72 | if (status < 0) { |
73 | mlog_errno(status); | |
74 | return status; | |
75 | } | |
6e4b0d56 | 76 | ocfs2_get_inode_flags(OCFS2_I(inode)); |
2b5f52c5 | 77 | flags = OCFS2_I(inode)->ip_attr; |
e63aecb6 | 78 | ocfs2_inode_unlock(inode, 0); |
ca4d147e | 79 | |
2b5f52c5 MS |
80 | fileattr_fill_flags(fa, flags & OCFS2_FL_VISIBLE); |
81 | ||
ca4d147e HP |
82 | return status; |
83 | } | |
84 | ||
8782a9ae | 85 | int ocfs2_fileattr_set(struct mnt_idmap *idmap, |
2b5f52c5 | 86 | struct dentry *dentry, struct fileattr *fa) |
ca4d147e | 87 | { |
2b5f52c5 MS |
88 | struct inode *inode = d_inode(dentry); |
89 | unsigned int flags = fa->flags; | |
ca4d147e HP |
90 | struct ocfs2_inode_info *ocfs2_inode = OCFS2_I(inode); |
91 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
1fabe148 | 92 | handle_t *handle = NULL; |
ca4d147e HP |
93 | struct buffer_head *bh = NULL; |
94 | unsigned oldflags; | |
95 | int status; | |
96 | ||
2b5f52c5 MS |
97 | if (fileattr_has_fsx(fa)) |
98 | return -EOPNOTSUPP; | |
ca4d147e | 99 | |
e63aecb6 | 100 | status = ocfs2_inode_lock(inode, &bh, 1); |
ca4d147e HP |
101 | if (status < 0) { |
102 | mlog_errno(status); | |
103 | goto bail; | |
104 | } | |
105 | ||
ca4d147e HP |
106 | if (!S_ISDIR(inode->i_mode)) |
107 | flags &= ~OCFS2_DIRSYNC_FL; | |
108 | ||
ca4d147e | 109 | oldflags = ocfs2_inode->ip_attr; |
2b5f52c5 MS |
110 | flags = flags & OCFS2_FL_MODIFIABLE; |
111 | flags |= oldflags & ~OCFS2_FL_MODIFIABLE; | |
ca4d147e | 112 | |
2b5f52c5 MS |
113 | /* Check already done by VFS, but repeat with ocfs lock */ |
114 | status = -EPERM; | |
115 | if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL) && | |
116 | !capable(CAP_LINUX_IMMUTABLE)) | |
5aca2842 | 117 | goto bail_unlock; |
b3e0767a JL |
118 | |
119 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
120 | if (IS_ERR(handle)) { | |
121 | status = PTR_ERR(handle); | |
122 | mlog_errno(status); | |
123 | goto bail_unlock; | |
ca4d147e HP |
124 | } |
125 | ||
126 | ocfs2_inode->ip_attr = flags; | |
127 | ocfs2_set_inode_flags(inode); | |
c9abe099 | 128 | inode_set_ctime_current(inode); |
ca4d147e HP |
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: |
a81cb88b | 139 | brelse(bh); |
ca4d147e | 140 | |
ca4d147e HP |
141 | return status; |
142 | } | |
143 | ||
c253ed1f FF |
144 | static int ocfs2_info_handle_blocksize(struct inode *inode, |
145 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 146 | { |
ddee5cdb TY |
147 | struct ocfs2_info_blocksize oib; |
148 | ||
149 | if (o2info_from_user(oib, req)) | |
2b462638 | 150 | return -EFAULT; |
ddee5cdb TY |
151 | |
152 | oib.ib_blocksize = inode->i_sb->s_blocksize; | |
1936a267 | 153 | |
8aa1fa36 | 154 | o2info_set_request_filled(&oib.ib_req); |
ddee5cdb TY |
155 | |
156 | if (o2info_to_user(oib, req)) | |
2b462638 | 157 | return -EFAULT; |
ddee5cdb | 158 | |
2b462638 | 159 | return 0; |
ddee5cdb TY |
160 | } |
161 | ||
c253ed1f FF |
162 | static int ocfs2_info_handle_clustersize(struct inode *inode, |
163 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 164 | { |
ddee5cdb TY |
165 | struct ocfs2_info_clustersize oic; |
166 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
167 | ||
168 | if (o2info_from_user(oic, req)) | |
2b462638 | 169 | return -EFAULT; |
ddee5cdb TY |
170 | |
171 | oic.ic_clustersize = osb->s_clustersize; | |
1936a267 | 172 | |
8aa1fa36 | 173 | o2info_set_request_filled(&oic.ic_req); |
ddee5cdb TY |
174 | |
175 | if (o2info_to_user(oic, req)) | |
2b462638 | 176 | return -EFAULT; |
ddee5cdb | 177 | |
2b462638 | 178 | return 0; |
ddee5cdb TY |
179 | } |
180 | ||
c253ed1f FF |
181 | static int ocfs2_info_handle_maxslots(struct inode *inode, |
182 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 183 | { |
ddee5cdb TY |
184 | struct ocfs2_info_maxslots oim; |
185 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
186 | ||
187 | if (o2info_from_user(oim, req)) | |
2b462638 | 188 | return -EFAULT; |
ddee5cdb TY |
189 | |
190 | oim.im_max_slots = osb->max_slots; | |
1936a267 | 191 | |
8aa1fa36 | 192 | o2info_set_request_filled(&oim.im_req); |
ddee5cdb TY |
193 | |
194 | if (o2info_to_user(oim, req)) | |
2b462638 | 195 | return -EFAULT; |
ddee5cdb | 196 | |
2b462638 | 197 | return 0; |
ddee5cdb TY |
198 | } |
199 | ||
c253ed1f FF |
200 | static int ocfs2_info_handle_label(struct inode *inode, |
201 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 202 | { |
ddee5cdb TY |
203 | struct ocfs2_info_label oil; |
204 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
205 | ||
206 | if (o2info_from_user(oil, req)) | |
2b462638 | 207 | return -EFAULT; |
ddee5cdb TY |
208 | |
209 | memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN); | |
1936a267 | 210 | |
8aa1fa36 | 211 | o2info_set_request_filled(&oil.il_req); |
ddee5cdb TY |
212 | |
213 | if (o2info_to_user(oil, req)) | |
2b462638 | 214 | return -EFAULT; |
ddee5cdb | 215 | |
2b462638 | 216 | return 0; |
ddee5cdb TY |
217 | } |
218 | ||
c253ed1f FF |
219 | static int ocfs2_info_handle_uuid(struct inode *inode, |
220 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 221 | { |
ddee5cdb TY |
222 | struct ocfs2_info_uuid oiu; |
223 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
224 | ||
225 | if (o2info_from_user(oiu, req)) | |
2b462638 | 226 | return -EFAULT; |
ddee5cdb TY |
227 | |
228 | memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1); | |
1936a267 | 229 | |
8aa1fa36 | 230 | o2info_set_request_filled(&oiu.iu_req); |
ddee5cdb TY |
231 | |
232 | if (o2info_to_user(oiu, req)) | |
2b462638 | 233 | return -EFAULT; |
ddee5cdb | 234 | |
2b462638 | 235 | return 0; |
ddee5cdb TY |
236 | } |
237 | ||
c253ed1f FF |
238 | static int ocfs2_info_handle_fs_features(struct inode *inode, |
239 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 240 | { |
ddee5cdb TY |
241 | struct ocfs2_info_fs_features oif; |
242 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
243 | ||
244 | if (o2info_from_user(oif, req)) | |
2b462638 | 245 | return -EFAULT; |
ddee5cdb TY |
246 | |
247 | oif.if_compat_features = osb->s_feature_compat; | |
248 | oif.if_incompat_features = osb->s_feature_incompat; | |
249 | oif.if_ro_compat_features = osb->s_feature_ro_compat; | |
1936a267 | 250 | |
8aa1fa36 | 251 | o2info_set_request_filled(&oif.if_req); |
ddee5cdb TY |
252 | |
253 | if (o2info_to_user(oif, req)) | |
2b462638 | 254 | return -EFAULT; |
ddee5cdb | 255 | |
2b462638 | 256 | return 0; |
ddee5cdb TY |
257 | } |
258 | ||
c253ed1f FF |
259 | static int ocfs2_info_handle_journal_size(struct inode *inode, |
260 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 261 | { |
ddee5cdb TY |
262 | struct ocfs2_info_journal_size oij; |
263 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
264 | ||
265 | if (o2info_from_user(oij, req)) | |
2b462638 | 266 | return -EFAULT; |
ddee5cdb | 267 | |
f17c20dd | 268 | oij.ij_journal_size = i_size_read(osb->journal->j_inode); |
ddee5cdb | 269 | |
8aa1fa36 | 270 | o2info_set_request_filled(&oij.ij_req); |
ddee5cdb TY |
271 | |
272 | if (o2info_to_user(oij, req)) | |
2b462638 | 273 | return -EFAULT; |
ddee5cdb | 274 | |
2b462638 | 275 | return 0; |
ddee5cdb TY |
276 | } |
277 | ||
c253ed1f FF |
278 | static int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb, |
279 | struct inode *inode_alloc, u64 blkno, | |
280 | struct ocfs2_info_freeinode *fi, | |
281 | u32 slot) | |
3e5db17d TY |
282 | { |
283 | int status = 0, unlock = 0; | |
284 | ||
285 | struct buffer_head *bh = NULL; | |
286 | struct ocfs2_dinode *dinode_alloc = NULL; | |
287 | ||
288 | if (inode_alloc) | |
5955102c | 289 | inode_lock(inode_alloc); |
3e5db17d | 290 | |
2abb7d3b | 291 | if (inode_alloc && o2info_coherent(&fi->ifi_req)) { |
3e5db17d TY |
292 | status = ocfs2_inode_lock(inode_alloc, &bh, 0); |
293 | if (status < 0) { | |
294 | mlog_errno(status); | |
295 | goto bail; | |
296 | } | |
297 | unlock = 1; | |
298 | } else { | |
299 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
300 | if (status < 0) { | |
301 | mlog_errno(status); | |
302 | goto bail; | |
303 | } | |
304 | } | |
305 | ||
306 | dinode_alloc = (struct ocfs2_dinode *)bh->b_data; | |
307 | ||
308 | fi->ifi_stat[slot].lfi_total = | |
309 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total); | |
310 | fi->ifi_stat[slot].lfi_free = | |
311 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) - | |
312 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_used); | |
313 | ||
314 | bail: | |
315 | if (unlock) | |
316 | ocfs2_inode_unlock(inode_alloc, 0); | |
317 | ||
318 | if (inode_alloc) | |
5955102c | 319 | inode_unlock(inode_alloc); |
3e5db17d TY |
320 | |
321 | brelse(bh); | |
322 | ||
323 | return status; | |
324 | } | |
325 | ||
c253ed1f FF |
326 | static int ocfs2_info_handle_freeinode(struct inode *inode, |
327 | struct ocfs2_info_request __user *req) | |
3e5db17d TY |
328 | { |
329 | u32 i; | |
330 | u64 blkno = -1; | |
331 | char namebuf[40]; | |
2b462638 | 332 | int status, type = INODE_ALLOC_SYSTEM_INODE; |
3e5db17d TY |
333 | struct ocfs2_info_freeinode *oifi = NULL; |
334 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
335 | struct inode *inode_alloc = NULL; | |
336 | ||
337 | oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL); | |
338 | if (!oifi) { | |
339 | status = -ENOMEM; | |
340 | mlog_errno(status); | |
87f0d5c8 | 341 | goto out_err; |
3e5db17d TY |
342 | } |
343 | ||
2b462638 BH |
344 | if (o2info_from_user(*oifi, req)) { |
345 | status = -EFAULT; | |
346 | goto out_free; | |
347 | } | |
3e5db17d TY |
348 | |
349 | oifi->ifi_slotnum = osb->max_slots; | |
350 | ||
351 | for (i = 0; i < oifi->ifi_slotnum; i++) { | |
352 | if (o2info_coherent(&oifi->ifi_req)) { | |
353 | inode_alloc = ocfs2_get_system_file_inode(osb, type, i); | |
354 | if (!inode_alloc) { | |
355 | mlog(ML_ERROR, "unable to get alloc inode in " | |
356 | "slot %u\n", i); | |
357 | status = -EIO; | |
358 | goto bail; | |
359 | } | |
360 | } else { | |
361 | ocfs2_sprintf_system_inode_name(namebuf, | |
362 | sizeof(namebuf), | |
363 | type, i); | |
364 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
365 | namebuf, | |
366 | strlen(namebuf), | |
367 | &blkno); | |
368 | if (status < 0) { | |
369 | status = -ENOENT; | |
370 | goto bail; | |
371 | } | |
372 | } | |
373 | ||
374 | status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i); | |
3e5db17d TY |
375 | |
376 | iput(inode_alloc); | |
377 | inode_alloc = NULL; | |
7dc3e839 | 378 | |
379 | if (status < 0) | |
380 | goto bail; | |
3e5db17d TY |
381 | } |
382 | ||
383 | o2info_set_request_filled(&oifi->ifi_req); | |
384 | ||
2b462638 BH |
385 | if (o2info_to_user(*oifi, req)) { |
386 | status = -EFAULT; | |
387 | goto out_free; | |
388 | } | |
3e5db17d TY |
389 | |
390 | status = 0; | |
391 | bail: | |
392 | if (status) | |
393 | o2info_set_request_error(&oifi->ifi_req, req); | |
2b462638 | 394 | out_free: |
3e5db17d | 395 | kfree(oifi); |
87f0d5c8 | 396 | out_err: |
3e5db17d TY |
397 | return status; |
398 | } | |
399 | ||
d24a10b9 TY |
400 | static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist, |
401 | unsigned int chunksize) | |
402 | { | |
731a40fa | 403 | u32 index; |
d24a10b9 TY |
404 | |
405 | index = __ilog2_u32(chunksize); | |
406 | if (index >= OCFS2_INFO_MAX_HIST) | |
407 | index = OCFS2_INFO_MAX_HIST - 1; | |
408 | ||
409 | hist->fc_chunks[index]++; | |
410 | hist->fc_clusters[index] += chunksize; | |
411 | } | |
412 | ||
413 | static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats, | |
414 | unsigned int chunksize) | |
415 | { | |
416 | if (chunksize > stats->ffs_max) | |
417 | stats->ffs_max = chunksize; | |
418 | ||
419 | if (chunksize < stats->ffs_min) | |
420 | stats->ffs_min = chunksize; | |
421 | ||
422 | stats->ffs_avg += chunksize; | |
423 | stats->ffs_free_chunks_real++; | |
424 | } | |
425 | ||
c253ed1f FF |
426 | static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg, |
427 | unsigned int chunksize) | |
d24a10b9 TY |
428 | { |
429 | o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize); | |
430 | o2ffg_update_stats(&(ffg->iff_ffs), chunksize); | |
431 | } | |
432 | ||
c253ed1f FF |
433 | static int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb, |
434 | struct inode *gb_inode, | |
435 | struct ocfs2_dinode *gb_dinode, | |
436 | struct ocfs2_chain_rec *rec, | |
437 | struct ocfs2_info_freefrag *ffg, | |
438 | u32 chunks_in_group) | |
d24a10b9 TY |
439 | { |
440 | int status = 0, used; | |
441 | u64 blkno; | |
442 | ||
443 | struct buffer_head *bh = NULL; | |
444 | struct ocfs2_group_desc *bg = NULL; | |
445 | ||
446 | unsigned int max_bits, num_clusters; | |
447 | unsigned int offset = 0, cluster, chunk; | |
448 | unsigned int chunk_free, last_chunksize = 0; | |
449 | ||
450 | if (!le32_to_cpu(rec->c_free)) | |
451 | goto bail; | |
452 | ||
453 | do { | |
454 | if (!bg) | |
455 | blkno = le64_to_cpu(rec->c_blkno); | |
456 | else | |
457 | blkno = le64_to_cpu(bg->bg_next_group); | |
458 | ||
459 | if (bh) { | |
460 | brelse(bh); | |
461 | bh = NULL; | |
462 | } | |
463 | ||
464 | if (o2info_coherent(&ffg->iff_req)) | |
465 | status = ocfs2_read_group_descriptor(gb_inode, | |
466 | gb_dinode, | |
467 | blkno, &bh); | |
468 | else | |
469 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
470 | ||
471 | if (status < 0) { | |
472 | mlog(ML_ERROR, "Can't read the group descriptor # " | |
473 | "%llu from device.", (unsigned long long)blkno); | |
474 | status = -EIO; | |
475 | goto bail; | |
476 | } | |
477 | ||
478 | bg = (struct ocfs2_group_desc *)bh->b_data; | |
479 | ||
480 | if (!le16_to_cpu(bg->bg_free_bits_count)) | |
481 | continue; | |
482 | ||
483 | max_bits = le16_to_cpu(bg->bg_bits); | |
484 | offset = 0; | |
485 | ||
486 | for (chunk = 0; chunk < chunks_in_group; chunk++) { | |
487 | /* | |
488 | * last chunk may be not an entire one. | |
489 | */ | |
490 | if ((offset + ffg->iff_chunksize) > max_bits) | |
491 | num_clusters = max_bits - offset; | |
492 | else | |
493 | num_clusters = ffg->iff_chunksize; | |
494 | ||
495 | chunk_free = 0; | |
496 | for (cluster = 0; cluster < num_clusters; cluster++) { | |
497 | used = ocfs2_test_bit(offset, | |
498 | (unsigned long *)bg->bg_bitmap); | |
499 | /* | |
500 | * - chunk_free counts free clusters in #N chunk. | |
501 | * - last_chunksize records the size(in) clusters | |
502 | * for the last real free chunk being counted. | |
503 | */ | |
504 | if (!used) { | |
505 | last_chunksize++; | |
506 | chunk_free++; | |
507 | } | |
508 | ||
509 | if (used && last_chunksize) { | |
510 | ocfs2_info_update_ffg(ffg, | |
511 | last_chunksize); | |
512 | last_chunksize = 0; | |
513 | } | |
514 | ||
515 | offset++; | |
516 | } | |
517 | ||
518 | if (chunk_free == ffg->iff_chunksize) | |
519 | ffg->iff_ffs.ffs_free_chunks++; | |
520 | } | |
521 | ||
522 | /* | |
523 | * need to update the info for last free chunk. | |
524 | */ | |
525 | if (last_chunksize) | |
526 | ocfs2_info_update_ffg(ffg, last_chunksize); | |
527 | ||
528 | } while (le64_to_cpu(bg->bg_next_group)); | |
529 | ||
530 | bail: | |
531 | brelse(bh); | |
532 | ||
533 | return status; | |
534 | } | |
535 | ||
c253ed1f FF |
536 | static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb, |
537 | struct inode *gb_inode, u64 blkno, | |
538 | struct ocfs2_info_freefrag *ffg) | |
d24a10b9 TY |
539 | { |
540 | u32 chunks_in_group; | |
541 | int status = 0, unlock = 0, i; | |
542 | ||
543 | struct buffer_head *bh = NULL; | |
544 | struct ocfs2_chain_list *cl = NULL; | |
545 | struct ocfs2_chain_rec *rec = NULL; | |
546 | struct ocfs2_dinode *gb_dinode = NULL; | |
547 | ||
548 | if (gb_inode) | |
5955102c | 549 | inode_lock(gb_inode); |
d24a10b9 TY |
550 | |
551 | if (o2info_coherent(&ffg->iff_req)) { | |
552 | status = ocfs2_inode_lock(gb_inode, &bh, 0); | |
553 | if (status < 0) { | |
554 | mlog_errno(status); | |
555 | goto bail; | |
556 | } | |
557 | unlock = 1; | |
558 | } else { | |
559 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
560 | if (status < 0) { | |
561 | mlog_errno(status); | |
562 | goto bail; | |
563 | } | |
564 | } | |
565 | ||
566 | gb_dinode = (struct ocfs2_dinode *)bh->b_data; | |
567 | cl = &(gb_dinode->id2.i_chain); | |
568 | ||
569 | /* | |
570 | * Chunksize(in) clusters from userspace should be | |
571 | * less than clusters in a group. | |
572 | */ | |
573 | if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) { | |
574 | status = -EINVAL; | |
575 | goto bail; | |
576 | } | |
577 | ||
578 | memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats)); | |
579 | ||
580 | ffg->iff_ffs.ffs_min = ~0U; | |
581 | ffg->iff_ffs.ffs_clusters = | |
582 | le32_to_cpu(gb_dinode->id1.bitmap1.i_total); | |
583 | ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters - | |
584 | le32_to_cpu(gb_dinode->id1.bitmap1.i_used); | |
585 | ||
586 | chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1; | |
587 | ||
588 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) { | |
589 | rec = &(cl->cl_recs[i]); | |
590 | status = ocfs2_info_freefrag_scan_chain(osb, gb_inode, | |
591 | gb_dinode, | |
592 | rec, ffg, | |
593 | chunks_in_group); | |
594 | if (status) | |
595 | goto bail; | |
596 | } | |
597 | ||
598 | if (ffg->iff_ffs.ffs_free_chunks_real) | |
599 | ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg / | |
600 | ffg->iff_ffs.ffs_free_chunks_real); | |
601 | bail: | |
602 | if (unlock) | |
603 | ocfs2_inode_unlock(gb_inode, 0); | |
604 | ||
605 | if (gb_inode) | |
5955102c | 606 | inode_unlock(gb_inode); |
d24a10b9 | 607 | |
72865d92 | 608 | iput(gb_inode); |
d24a10b9 TY |
609 | brelse(bh); |
610 | ||
611 | return status; | |
612 | } | |
613 | ||
c253ed1f FF |
614 | static int ocfs2_info_handle_freefrag(struct inode *inode, |
615 | struct ocfs2_info_request __user *req) | |
d24a10b9 TY |
616 | { |
617 | u64 blkno = -1; | |
618 | char namebuf[40]; | |
2b462638 | 619 | int status, type = GLOBAL_BITMAP_SYSTEM_INODE; |
d24a10b9 TY |
620 | |
621 | struct ocfs2_info_freefrag *oiff; | |
622 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
623 | struct inode *gb_inode = NULL; | |
624 | ||
625 | oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL); | |
626 | if (!oiff) { | |
627 | status = -ENOMEM; | |
628 | mlog_errno(status); | |
87f0d5c8 | 629 | goto out_err; |
d24a10b9 TY |
630 | } |
631 | ||
2b462638 BH |
632 | if (o2info_from_user(*oiff, req)) { |
633 | status = -EFAULT; | |
634 | goto out_free; | |
635 | } | |
d24a10b9 TY |
636 | /* |
637 | * chunksize from userspace should be power of 2. | |
638 | */ | |
639 | if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) || | |
640 | (!oiff->iff_chunksize)) { | |
641 | status = -EINVAL; | |
642 | goto bail; | |
643 | } | |
644 | ||
645 | if (o2info_coherent(&oiff->iff_req)) { | |
646 | gb_inode = ocfs2_get_system_file_inode(osb, type, | |
647 | OCFS2_INVALID_SLOT); | |
648 | if (!gb_inode) { | |
649 | mlog(ML_ERROR, "unable to get global_bitmap inode\n"); | |
650 | status = -EIO; | |
651 | goto bail; | |
652 | } | |
653 | } else { | |
654 | ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type, | |
655 | OCFS2_INVALID_SLOT); | |
656 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
657 | namebuf, | |
658 | strlen(namebuf), | |
659 | &blkno); | |
660 | if (status < 0) { | |
661 | status = -ENOENT; | |
662 | goto bail; | |
663 | } | |
664 | } | |
665 | ||
666 | status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff); | |
667 | if (status < 0) | |
668 | goto bail; | |
669 | ||
670 | o2info_set_request_filled(&oiff->iff_req); | |
671 | ||
7ebab453 WY |
672 | if (o2info_to_user(*oiff, req)) { |
673 | status = -EFAULT; | |
2b462638 | 674 | goto out_free; |
7ebab453 | 675 | } |
d24a10b9 TY |
676 | |
677 | status = 0; | |
678 | bail: | |
679 | if (status) | |
680 | o2info_set_request_error(&oiff->iff_req, req); | |
2b462638 | 681 | out_free: |
d24a10b9 | 682 | kfree(oiff); |
87f0d5c8 | 683 | out_err: |
ddee5cdb TY |
684 | return status; |
685 | } | |
686 | ||
c253ed1f FF |
687 | static int ocfs2_info_handle_unknown(struct inode *inode, |
688 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 689 | { |
ddee5cdb TY |
690 | struct ocfs2_info_request oir; |
691 | ||
692 | if (o2info_from_user(oir, req)) | |
2b462638 | 693 | return -EFAULT; |
ddee5cdb | 694 | |
8aa1fa36 | 695 | o2info_clear_request_filled(&oir); |
ddee5cdb TY |
696 | |
697 | if (o2info_to_user(oir, req)) | |
2b462638 | 698 | return -EFAULT; |
ddee5cdb | 699 | |
2b462638 | 700 | return 0; |
ddee5cdb TY |
701 | } |
702 | ||
703 | /* | |
704 | * Validate and distinguish OCFS2_IOC_INFO requests. | |
705 | * | |
706 | * - validate the magic number. | |
707 | * - distinguish different requests. | |
708 | * - validate size of different requests. | |
709 | */ | |
c253ed1f FF |
710 | static int ocfs2_info_handle_request(struct inode *inode, |
711 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
712 | { |
713 | int status = -EFAULT; | |
714 | struct ocfs2_info_request oir; | |
715 | ||
716 | if (o2info_from_user(oir, req)) | |
717 | goto bail; | |
718 | ||
719 | status = -EINVAL; | |
720 | if (oir.ir_magic != OCFS2_INFO_MAGIC) | |
721 | goto bail; | |
722 | ||
723 | switch (oir.ir_code) { | |
724 | case OCFS2_INFO_BLOCKSIZE: | |
725 | if (oir.ir_size == sizeof(struct ocfs2_info_blocksize)) | |
726 | status = ocfs2_info_handle_blocksize(inode, req); | |
727 | break; | |
728 | case OCFS2_INFO_CLUSTERSIZE: | |
729 | if (oir.ir_size == sizeof(struct ocfs2_info_clustersize)) | |
730 | status = ocfs2_info_handle_clustersize(inode, req); | |
731 | break; | |
732 | case OCFS2_INFO_MAXSLOTS: | |
733 | if (oir.ir_size == sizeof(struct ocfs2_info_maxslots)) | |
734 | status = ocfs2_info_handle_maxslots(inode, req); | |
735 | break; | |
736 | case OCFS2_INFO_LABEL: | |
737 | if (oir.ir_size == sizeof(struct ocfs2_info_label)) | |
738 | status = ocfs2_info_handle_label(inode, req); | |
739 | break; | |
740 | case OCFS2_INFO_UUID: | |
741 | if (oir.ir_size == sizeof(struct ocfs2_info_uuid)) | |
742 | status = ocfs2_info_handle_uuid(inode, req); | |
743 | break; | |
744 | case OCFS2_INFO_FS_FEATURES: | |
745 | if (oir.ir_size == sizeof(struct ocfs2_info_fs_features)) | |
746 | status = ocfs2_info_handle_fs_features(inode, req); | |
747 | break; | |
748 | case OCFS2_INFO_JOURNAL_SIZE: | |
749 | if (oir.ir_size == sizeof(struct ocfs2_info_journal_size)) | |
750 | status = ocfs2_info_handle_journal_size(inode, req); | |
751 | break; | |
3e5db17d TY |
752 | case OCFS2_INFO_FREEINODE: |
753 | if (oir.ir_size == sizeof(struct ocfs2_info_freeinode)) | |
754 | status = ocfs2_info_handle_freeinode(inode, req); | |
755 | break; | |
d24a10b9 TY |
756 | case OCFS2_INFO_FREEFRAG: |
757 | if (oir.ir_size == sizeof(struct ocfs2_info_freefrag)) | |
758 | status = ocfs2_info_handle_freefrag(inode, req); | |
759 | break; | |
ddee5cdb TY |
760 | default: |
761 | status = ocfs2_info_handle_unknown(inode, req); | |
762 | break; | |
763 | } | |
764 | ||
765 | bail: | |
766 | return status; | |
767 | } | |
768 | ||
c253ed1f FF |
769 | static int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx, |
770 | u64 *req_addr, int compat_flag) | |
ddee5cdb TY |
771 | { |
772 | int status = -EFAULT; | |
773 | u64 __user *bp = NULL; | |
774 | ||
775 | if (compat_flag) { | |
776 | #ifdef CONFIG_COMPAT | |
777 | /* | |
778 | * pointer bp stores the base address of a pointers array, | |
779 | * which collects all addresses of separate request. | |
780 | */ | |
781 | bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests); | |
782 | #else | |
783 | BUG(); | |
784 | #endif | |
785 | } else | |
786 | bp = (u64 __user *)(unsigned long)(info->oi_requests); | |
787 | ||
788 | if (o2info_from_user(*req_addr, bp + idx)) | |
789 | goto bail; | |
790 | ||
791 | status = 0; | |
792 | bail: | |
793 | return status; | |
794 | } | |
795 | ||
796 | /* | |
797 | * OCFS2_IOC_INFO handles an array of requests passed from userspace. | |
798 | * | |
799 | * ocfs2_info_handle() recevies a large info aggregation, grab and | |
800 | * validate the request count from header, then break it into small | |
801 | * pieces, later specific handlers can handle them one by one. | |
802 | * | |
803 | * Idea here is to make each separate request small enough to ensure | |
804 | * a better backward&forward compatibility, since a small piece of | |
805 | * request will be less likely to be broken if disk layout get changed. | |
806 | */ | |
09d49eb9 AB |
807 | static noinline_for_stack int |
808 | ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, int compat_flag) | |
ddee5cdb TY |
809 | { |
810 | int i, status = 0; | |
811 | u64 req_addr; | |
812 | struct ocfs2_info_request __user *reqp; | |
813 | ||
814 | if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) || | |
815 | (!info->oi_requests)) { | |
816 | status = -EINVAL; | |
817 | goto bail; | |
818 | } | |
819 | ||
820 | for (i = 0; i < info->oi_count; i++) { | |
821 | ||
822 | status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag); | |
823 | if (status) | |
824 | break; | |
825 | ||
f6a56903 | 826 | reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr; |
ddee5cdb TY |
827 | if (!reqp) { |
828 | status = -EINVAL; | |
829 | goto bail; | |
830 | } | |
831 | ||
832 | status = ocfs2_info_handle_request(inode, reqp); | |
833 | if (status) | |
834 | break; | |
835 | } | |
836 | ||
837 | bail: | |
838 | return status; | |
839 | } | |
840 | ||
c9ec1488 | 841 | long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ca4d147e | 842 | { |
496ad9aa | 843 | struct inode *inode = file_inode(filp); |
f6a56903 | 844 | void __user *argp = (void __user *)arg; |
09d49eb9 | 845 | int status; |
ca4d147e HP |
846 | |
847 | switch (cmd) { | |
b2580103 MF |
848 | case OCFS2_IOC_RESVSP: |
849 | case OCFS2_IOC_RESVSP64: | |
850 | case OCFS2_IOC_UNRESVSP: | |
851 | case OCFS2_IOC_UNRESVSP64: | |
09d49eb9 AB |
852 | { |
853 | struct ocfs2_space_resv sr; | |
854 | ||
b2580103 MF |
855 | if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) |
856 | return -EFAULT; | |
857 | ||
858 | return ocfs2_change_file_space(filp, cmd, &sr); | |
09d49eb9 | 859 | } |
d659072f | 860 | case OCFS2_IOC_GROUP_EXTEND: |
09d49eb9 AB |
861 | { |
862 | int new_clusters; | |
863 | ||
0957f007 MF |
864 | if (!capable(CAP_SYS_RESOURCE)) |
865 | return -EPERM; | |
866 | ||
d659072f TM |
867 | if (get_user(new_clusters, (int __user *)arg)) |
868 | return -EFAULT; | |
869 | ||
fef6925c JK |
870 | status = mnt_want_write_file(filp); |
871 | if (status) | |
872 | return status; | |
873 | status = ocfs2_group_extend(inode, new_clusters); | |
874 | mnt_drop_write_file(filp); | |
875 | return status; | |
09d49eb9 | 876 | } |
7909f2bf TM |
877 | case OCFS2_IOC_GROUP_ADD: |
878 | case OCFS2_IOC_GROUP_ADD64: | |
09d49eb9 AB |
879 | { |
880 | struct ocfs2_new_group_input input; | |
881 | ||
0957f007 MF |
882 | if (!capable(CAP_SYS_RESOURCE)) |
883 | return -EPERM; | |
884 | ||
7909f2bf TM |
885 | if (copy_from_user(&input, (int __user *) arg, sizeof(input))) |
886 | return -EFAULT; | |
887 | ||
fef6925c JK |
888 | status = mnt_want_write_file(filp); |
889 | if (status) | |
890 | return status; | |
891 | status = ocfs2_group_add(inode, &input); | |
892 | mnt_drop_write_file(filp); | |
893 | return status; | |
09d49eb9 | 894 | } |
bd50873d | 895 | case OCFS2_IOC_REFLINK: |
09d49eb9 AB |
896 | { |
897 | struct reflink_arguments args; | |
898 | const char __user *old_path; | |
899 | const char __user *new_path; | |
900 | bool preserve; | |
901 | ||
f6a56903 | 902 | if (copy_from_user(&args, argp, sizeof(args))) |
bd50873d | 903 | return -EFAULT; |
f6a56903 AV |
904 | old_path = (const char __user *)(unsigned long)args.old_path; |
905 | new_path = (const char __user *)(unsigned long)args.new_path; | |
bd50873d TM |
906 | preserve = (args.preserve != 0); |
907 | ||
908 | return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); | |
09d49eb9 | 909 | } |
ddee5cdb | 910 | case OCFS2_IOC_INFO: |
09d49eb9 AB |
911 | { |
912 | struct ocfs2_info info; | |
913 | ||
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); | |
09d49eb9 | 918 | } |
55e67872 TM |
919 | case FITRIM: |
920 | { | |
921 | struct super_block *sb = inode->i_sb; | |
922 | struct fstrim_range range; | |
923 | int ret = 0; | |
924 | ||
925 | if (!capable(CAP_SYS_ADMIN)) | |
926 | return -EPERM; | |
927 | ||
70200574 | 928 | if (!bdev_max_discard_sectors(sb->s_bdev)) |
19e8ac27 JL |
929 | return -EOPNOTSUPP; |
930 | ||
f6a56903 | 931 | if (copy_from_user(&range, argp, sizeof(range))) |
55e67872 TM |
932 | return -EFAULT; |
933 | ||
7b47ef52 | 934 | range.minlen = max_t(u64, bdev_discard_granularity(sb->s_bdev), |
1ba2212b | 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 | 961 | switch (cmd) { |
b2580103 MF |
962 | case OCFS2_IOC_RESVSP: |
963 | case OCFS2_IOC_RESVSP64: | |
964 | case OCFS2_IOC_UNRESVSP: | |
965 | case OCFS2_IOC_UNRESVSP64: | |
d659072f | 966 | case OCFS2_IOC_GROUP_EXTEND: |
7909f2bf TM |
967 | case OCFS2_IOC_GROUP_ADD: |
968 | case OCFS2_IOC_GROUP_ADD64: | |
b2580103 | 969 | break; |
34e6c59a | 970 | case OCFS2_IOC_REFLINK: |
f6a56903 | 971 | if (copy_from_user(&args, argp, sizeof(args))) |
34e6c59a TM |
972 | return -EFAULT; |
973 | preserve = (args.preserve != 0); | |
974 | ||
975 | return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path), | |
976 | compat_ptr(args.new_path), preserve); | |
ddee5cdb | 977 | case OCFS2_IOC_INFO: |
f6a56903 | 978 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
979 | return -EFAULT; |
980 | ||
981 | return ocfs2_info_handle(inode, &info, 1); | |
314999dc | 982 | case FITRIM: |
53069d4e TY |
983 | case OCFS2_IOC_MOVE_EXT: |
984 | break; | |
586d232b MF |
985 | default: |
986 | return -ENOIOCTLCMD; | |
987 | } | |
988 | ||
c9ec1488 | 989 | return ocfs2_ioctl(file, cmd, arg); |
586d232b MF |
990 | } |
991 | #endif |