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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> |
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 | ||
2b5f52c5 MS |
85 | int ocfs2_fileattr_set(struct user_namespace *mnt_userns, |
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); | |
128 | ||
129 | status = ocfs2_mark_inode_dirty(handle, inode, bh); | |
130 | if (status < 0) | |
131 | mlog_errno(status); | |
132 | ||
02dc1af4 | 133 | ocfs2_commit_trans(osb, handle); |
b3e0767a | 134 | |
ca4d147e | 135 | bail_unlock: |
e63aecb6 | 136 | ocfs2_inode_unlock(inode, 1); |
ca4d147e | 137 | bail: |
a81cb88b | 138 | brelse(bh); |
ca4d147e | 139 | |
ca4d147e HP |
140 | return status; |
141 | } | |
142 | ||
c253ed1f FF |
143 | static int ocfs2_info_handle_blocksize(struct inode *inode, |
144 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 145 | { |
ddee5cdb TY |
146 | struct ocfs2_info_blocksize oib; |
147 | ||
148 | if (o2info_from_user(oib, req)) | |
2b462638 | 149 | return -EFAULT; |
ddee5cdb TY |
150 | |
151 | oib.ib_blocksize = inode->i_sb->s_blocksize; | |
1936a267 | 152 | |
8aa1fa36 | 153 | o2info_set_request_filled(&oib.ib_req); |
ddee5cdb TY |
154 | |
155 | if (o2info_to_user(oib, req)) | |
2b462638 | 156 | return -EFAULT; |
ddee5cdb | 157 | |
2b462638 | 158 | return 0; |
ddee5cdb TY |
159 | } |
160 | ||
c253ed1f FF |
161 | static int ocfs2_info_handle_clustersize(struct inode *inode, |
162 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 163 | { |
ddee5cdb TY |
164 | struct ocfs2_info_clustersize oic; |
165 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
166 | ||
167 | if (o2info_from_user(oic, req)) | |
2b462638 | 168 | return -EFAULT; |
ddee5cdb TY |
169 | |
170 | oic.ic_clustersize = osb->s_clustersize; | |
1936a267 | 171 | |
8aa1fa36 | 172 | o2info_set_request_filled(&oic.ic_req); |
ddee5cdb TY |
173 | |
174 | if (o2info_to_user(oic, req)) | |
2b462638 | 175 | return -EFAULT; |
ddee5cdb | 176 | |
2b462638 | 177 | return 0; |
ddee5cdb TY |
178 | } |
179 | ||
c253ed1f FF |
180 | static int ocfs2_info_handle_maxslots(struct inode *inode, |
181 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 182 | { |
ddee5cdb TY |
183 | struct ocfs2_info_maxslots oim; |
184 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
185 | ||
186 | if (o2info_from_user(oim, req)) | |
2b462638 | 187 | return -EFAULT; |
ddee5cdb TY |
188 | |
189 | oim.im_max_slots = osb->max_slots; | |
1936a267 | 190 | |
8aa1fa36 | 191 | o2info_set_request_filled(&oim.im_req); |
ddee5cdb TY |
192 | |
193 | if (o2info_to_user(oim, req)) | |
2b462638 | 194 | return -EFAULT; |
ddee5cdb | 195 | |
2b462638 | 196 | return 0; |
ddee5cdb TY |
197 | } |
198 | ||
c253ed1f FF |
199 | static int ocfs2_info_handle_label(struct inode *inode, |
200 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 201 | { |
ddee5cdb TY |
202 | struct ocfs2_info_label oil; |
203 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
204 | ||
205 | if (o2info_from_user(oil, req)) | |
2b462638 | 206 | return -EFAULT; |
ddee5cdb TY |
207 | |
208 | memcpy(oil.il_label, osb->vol_label, OCFS2_MAX_VOL_LABEL_LEN); | |
1936a267 | 209 | |
8aa1fa36 | 210 | o2info_set_request_filled(&oil.il_req); |
ddee5cdb TY |
211 | |
212 | if (o2info_to_user(oil, req)) | |
2b462638 | 213 | return -EFAULT; |
ddee5cdb | 214 | |
2b462638 | 215 | return 0; |
ddee5cdb TY |
216 | } |
217 | ||
c253ed1f FF |
218 | static int ocfs2_info_handle_uuid(struct inode *inode, |
219 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 220 | { |
ddee5cdb TY |
221 | struct ocfs2_info_uuid oiu; |
222 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
223 | ||
224 | if (o2info_from_user(oiu, req)) | |
2b462638 | 225 | return -EFAULT; |
ddee5cdb TY |
226 | |
227 | memcpy(oiu.iu_uuid_str, osb->uuid_str, OCFS2_TEXT_UUID_LEN + 1); | |
1936a267 | 228 | |
8aa1fa36 | 229 | o2info_set_request_filled(&oiu.iu_req); |
ddee5cdb TY |
230 | |
231 | if (o2info_to_user(oiu, req)) | |
2b462638 | 232 | return -EFAULT; |
ddee5cdb | 233 | |
2b462638 | 234 | return 0; |
ddee5cdb TY |
235 | } |
236 | ||
c253ed1f FF |
237 | static int ocfs2_info_handle_fs_features(struct inode *inode, |
238 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 239 | { |
ddee5cdb TY |
240 | struct ocfs2_info_fs_features oif; |
241 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
242 | ||
243 | if (o2info_from_user(oif, req)) | |
2b462638 | 244 | return -EFAULT; |
ddee5cdb TY |
245 | |
246 | oif.if_compat_features = osb->s_feature_compat; | |
247 | oif.if_incompat_features = osb->s_feature_incompat; | |
248 | oif.if_ro_compat_features = osb->s_feature_ro_compat; | |
1936a267 | 249 | |
8aa1fa36 | 250 | o2info_set_request_filled(&oif.if_req); |
ddee5cdb TY |
251 | |
252 | if (o2info_to_user(oif, req)) | |
2b462638 | 253 | return -EFAULT; |
ddee5cdb | 254 | |
2b462638 | 255 | return 0; |
ddee5cdb TY |
256 | } |
257 | ||
c253ed1f FF |
258 | static int ocfs2_info_handle_journal_size(struct inode *inode, |
259 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 260 | { |
ddee5cdb TY |
261 | struct ocfs2_info_journal_size oij; |
262 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
263 | ||
264 | if (o2info_from_user(oij, req)) | |
2b462638 | 265 | return -EFAULT; |
ddee5cdb | 266 | |
f17c20dd | 267 | oij.ij_journal_size = i_size_read(osb->journal->j_inode); |
ddee5cdb | 268 | |
8aa1fa36 | 269 | o2info_set_request_filled(&oij.ij_req); |
ddee5cdb TY |
270 | |
271 | if (o2info_to_user(oij, req)) | |
2b462638 | 272 | return -EFAULT; |
ddee5cdb | 273 | |
2b462638 | 274 | return 0; |
ddee5cdb TY |
275 | } |
276 | ||
c253ed1f FF |
277 | static int ocfs2_info_scan_inode_alloc(struct ocfs2_super *osb, |
278 | struct inode *inode_alloc, u64 blkno, | |
279 | struct ocfs2_info_freeinode *fi, | |
280 | u32 slot) | |
3e5db17d TY |
281 | { |
282 | int status = 0, unlock = 0; | |
283 | ||
284 | struct buffer_head *bh = NULL; | |
285 | struct ocfs2_dinode *dinode_alloc = NULL; | |
286 | ||
287 | if (inode_alloc) | |
5955102c | 288 | inode_lock(inode_alloc); |
3e5db17d | 289 | |
2abb7d3b | 290 | if (inode_alloc && o2info_coherent(&fi->ifi_req)) { |
3e5db17d TY |
291 | status = ocfs2_inode_lock(inode_alloc, &bh, 0); |
292 | if (status < 0) { | |
293 | mlog_errno(status); | |
294 | goto bail; | |
295 | } | |
296 | unlock = 1; | |
297 | } else { | |
298 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
299 | if (status < 0) { | |
300 | mlog_errno(status); | |
301 | goto bail; | |
302 | } | |
303 | } | |
304 | ||
305 | dinode_alloc = (struct ocfs2_dinode *)bh->b_data; | |
306 | ||
307 | fi->ifi_stat[slot].lfi_total = | |
308 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total); | |
309 | fi->ifi_stat[slot].lfi_free = | |
310 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_total) - | |
311 | le32_to_cpu(dinode_alloc->id1.bitmap1.i_used); | |
312 | ||
313 | bail: | |
314 | if (unlock) | |
315 | ocfs2_inode_unlock(inode_alloc, 0); | |
316 | ||
317 | if (inode_alloc) | |
5955102c | 318 | inode_unlock(inode_alloc); |
3e5db17d TY |
319 | |
320 | brelse(bh); | |
321 | ||
322 | return status; | |
323 | } | |
324 | ||
c253ed1f FF |
325 | static int ocfs2_info_handle_freeinode(struct inode *inode, |
326 | struct ocfs2_info_request __user *req) | |
3e5db17d TY |
327 | { |
328 | u32 i; | |
329 | u64 blkno = -1; | |
330 | char namebuf[40]; | |
2b462638 | 331 | int status, type = INODE_ALLOC_SYSTEM_INODE; |
3e5db17d TY |
332 | struct ocfs2_info_freeinode *oifi = NULL; |
333 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
334 | struct inode *inode_alloc = NULL; | |
335 | ||
336 | oifi = kzalloc(sizeof(struct ocfs2_info_freeinode), GFP_KERNEL); | |
337 | if (!oifi) { | |
338 | status = -ENOMEM; | |
339 | mlog_errno(status); | |
87f0d5c8 | 340 | goto out_err; |
3e5db17d TY |
341 | } |
342 | ||
2b462638 BH |
343 | if (o2info_from_user(*oifi, req)) { |
344 | status = -EFAULT; | |
345 | goto out_free; | |
346 | } | |
3e5db17d TY |
347 | |
348 | oifi->ifi_slotnum = osb->max_slots; | |
349 | ||
350 | for (i = 0; i < oifi->ifi_slotnum; i++) { | |
351 | if (o2info_coherent(&oifi->ifi_req)) { | |
352 | inode_alloc = ocfs2_get_system_file_inode(osb, type, i); | |
353 | if (!inode_alloc) { | |
354 | mlog(ML_ERROR, "unable to get alloc inode in " | |
355 | "slot %u\n", i); | |
356 | status = -EIO; | |
357 | goto bail; | |
358 | } | |
359 | } else { | |
360 | ocfs2_sprintf_system_inode_name(namebuf, | |
361 | sizeof(namebuf), | |
362 | type, i); | |
363 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
364 | namebuf, | |
365 | strlen(namebuf), | |
366 | &blkno); | |
367 | if (status < 0) { | |
368 | status = -ENOENT; | |
369 | goto bail; | |
370 | } | |
371 | } | |
372 | ||
373 | status = ocfs2_info_scan_inode_alloc(osb, inode_alloc, blkno, oifi, i); | |
3e5db17d TY |
374 | |
375 | iput(inode_alloc); | |
376 | inode_alloc = NULL; | |
7dc3e839 | 377 | |
378 | if (status < 0) | |
379 | goto bail; | |
3e5db17d TY |
380 | } |
381 | ||
382 | o2info_set_request_filled(&oifi->ifi_req); | |
383 | ||
2b462638 BH |
384 | if (o2info_to_user(*oifi, req)) { |
385 | status = -EFAULT; | |
386 | goto out_free; | |
387 | } | |
3e5db17d TY |
388 | |
389 | status = 0; | |
390 | bail: | |
391 | if (status) | |
392 | o2info_set_request_error(&oifi->ifi_req, req); | |
2b462638 | 393 | out_free: |
3e5db17d | 394 | kfree(oifi); |
87f0d5c8 | 395 | out_err: |
3e5db17d TY |
396 | return status; |
397 | } | |
398 | ||
d24a10b9 TY |
399 | static void o2ffg_update_histogram(struct ocfs2_info_free_chunk_list *hist, |
400 | unsigned int chunksize) | |
401 | { | |
731a40fa | 402 | u32 index; |
d24a10b9 TY |
403 | |
404 | index = __ilog2_u32(chunksize); | |
405 | if (index >= OCFS2_INFO_MAX_HIST) | |
406 | index = OCFS2_INFO_MAX_HIST - 1; | |
407 | ||
408 | hist->fc_chunks[index]++; | |
409 | hist->fc_clusters[index] += chunksize; | |
410 | } | |
411 | ||
412 | static void o2ffg_update_stats(struct ocfs2_info_freefrag_stats *stats, | |
413 | unsigned int chunksize) | |
414 | { | |
415 | if (chunksize > stats->ffs_max) | |
416 | stats->ffs_max = chunksize; | |
417 | ||
418 | if (chunksize < stats->ffs_min) | |
419 | stats->ffs_min = chunksize; | |
420 | ||
421 | stats->ffs_avg += chunksize; | |
422 | stats->ffs_free_chunks_real++; | |
423 | } | |
424 | ||
c253ed1f FF |
425 | static void ocfs2_info_update_ffg(struct ocfs2_info_freefrag *ffg, |
426 | unsigned int chunksize) | |
d24a10b9 TY |
427 | { |
428 | o2ffg_update_histogram(&(ffg->iff_ffs.ffs_fc_hist), chunksize); | |
429 | o2ffg_update_stats(&(ffg->iff_ffs), chunksize); | |
430 | } | |
431 | ||
c253ed1f FF |
432 | static int ocfs2_info_freefrag_scan_chain(struct ocfs2_super *osb, |
433 | struct inode *gb_inode, | |
434 | struct ocfs2_dinode *gb_dinode, | |
435 | struct ocfs2_chain_rec *rec, | |
436 | struct ocfs2_info_freefrag *ffg, | |
437 | u32 chunks_in_group) | |
d24a10b9 TY |
438 | { |
439 | int status = 0, used; | |
440 | u64 blkno; | |
441 | ||
442 | struct buffer_head *bh = NULL; | |
443 | struct ocfs2_group_desc *bg = NULL; | |
444 | ||
445 | unsigned int max_bits, num_clusters; | |
446 | unsigned int offset = 0, cluster, chunk; | |
447 | unsigned int chunk_free, last_chunksize = 0; | |
448 | ||
449 | if (!le32_to_cpu(rec->c_free)) | |
450 | goto bail; | |
451 | ||
452 | do { | |
453 | if (!bg) | |
454 | blkno = le64_to_cpu(rec->c_blkno); | |
455 | else | |
456 | blkno = le64_to_cpu(bg->bg_next_group); | |
457 | ||
458 | if (bh) { | |
459 | brelse(bh); | |
460 | bh = NULL; | |
461 | } | |
462 | ||
463 | if (o2info_coherent(&ffg->iff_req)) | |
464 | status = ocfs2_read_group_descriptor(gb_inode, | |
465 | gb_dinode, | |
466 | blkno, &bh); | |
467 | else | |
468 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
469 | ||
470 | if (status < 0) { | |
471 | mlog(ML_ERROR, "Can't read the group descriptor # " | |
472 | "%llu from device.", (unsigned long long)blkno); | |
473 | status = -EIO; | |
474 | goto bail; | |
475 | } | |
476 | ||
477 | bg = (struct ocfs2_group_desc *)bh->b_data; | |
478 | ||
479 | if (!le16_to_cpu(bg->bg_free_bits_count)) | |
480 | continue; | |
481 | ||
482 | max_bits = le16_to_cpu(bg->bg_bits); | |
483 | offset = 0; | |
484 | ||
485 | for (chunk = 0; chunk < chunks_in_group; chunk++) { | |
486 | /* | |
487 | * last chunk may be not an entire one. | |
488 | */ | |
489 | if ((offset + ffg->iff_chunksize) > max_bits) | |
490 | num_clusters = max_bits - offset; | |
491 | else | |
492 | num_clusters = ffg->iff_chunksize; | |
493 | ||
494 | chunk_free = 0; | |
495 | for (cluster = 0; cluster < num_clusters; cluster++) { | |
496 | used = ocfs2_test_bit(offset, | |
497 | (unsigned long *)bg->bg_bitmap); | |
498 | /* | |
499 | * - chunk_free counts free clusters in #N chunk. | |
500 | * - last_chunksize records the size(in) clusters | |
501 | * for the last real free chunk being counted. | |
502 | */ | |
503 | if (!used) { | |
504 | last_chunksize++; | |
505 | chunk_free++; | |
506 | } | |
507 | ||
508 | if (used && last_chunksize) { | |
509 | ocfs2_info_update_ffg(ffg, | |
510 | last_chunksize); | |
511 | last_chunksize = 0; | |
512 | } | |
513 | ||
514 | offset++; | |
515 | } | |
516 | ||
517 | if (chunk_free == ffg->iff_chunksize) | |
518 | ffg->iff_ffs.ffs_free_chunks++; | |
519 | } | |
520 | ||
521 | /* | |
522 | * need to update the info for last free chunk. | |
523 | */ | |
524 | if (last_chunksize) | |
525 | ocfs2_info_update_ffg(ffg, last_chunksize); | |
526 | ||
527 | } while (le64_to_cpu(bg->bg_next_group)); | |
528 | ||
529 | bail: | |
530 | brelse(bh); | |
531 | ||
532 | return status; | |
533 | } | |
534 | ||
c253ed1f FF |
535 | static int ocfs2_info_freefrag_scan_bitmap(struct ocfs2_super *osb, |
536 | struct inode *gb_inode, u64 blkno, | |
537 | struct ocfs2_info_freefrag *ffg) | |
d24a10b9 TY |
538 | { |
539 | u32 chunks_in_group; | |
540 | int status = 0, unlock = 0, i; | |
541 | ||
542 | struct buffer_head *bh = NULL; | |
543 | struct ocfs2_chain_list *cl = NULL; | |
544 | struct ocfs2_chain_rec *rec = NULL; | |
545 | struct ocfs2_dinode *gb_dinode = NULL; | |
546 | ||
547 | if (gb_inode) | |
5955102c | 548 | inode_lock(gb_inode); |
d24a10b9 TY |
549 | |
550 | if (o2info_coherent(&ffg->iff_req)) { | |
551 | status = ocfs2_inode_lock(gb_inode, &bh, 0); | |
552 | if (status < 0) { | |
553 | mlog_errno(status); | |
554 | goto bail; | |
555 | } | |
556 | unlock = 1; | |
557 | } else { | |
558 | status = ocfs2_read_blocks_sync(osb, blkno, 1, &bh); | |
559 | if (status < 0) { | |
560 | mlog_errno(status); | |
561 | goto bail; | |
562 | } | |
563 | } | |
564 | ||
565 | gb_dinode = (struct ocfs2_dinode *)bh->b_data; | |
566 | cl = &(gb_dinode->id2.i_chain); | |
567 | ||
568 | /* | |
569 | * Chunksize(in) clusters from userspace should be | |
570 | * less than clusters in a group. | |
571 | */ | |
572 | if (ffg->iff_chunksize > le16_to_cpu(cl->cl_cpg)) { | |
573 | status = -EINVAL; | |
574 | goto bail; | |
575 | } | |
576 | ||
577 | memset(&ffg->iff_ffs, 0, sizeof(struct ocfs2_info_freefrag_stats)); | |
578 | ||
579 | ffg->iff_ffs.ffs_min = ~0U; | |
580 | ffg->iff_ffs.ffs_clusters = | |
581 | le32_to_cpu(gb_dinode->id1.bitmap1.i_total); | |
582 | ffg->iff_ffs.ffs_free_clusters = ffg->iff_ffs.ffs_clusters - | |
583 | le32_to_cpu(gb_dinode->id1.bitmap1.i_used); | |
584 | ||
585 | chunks_in_group = le16_to_cpu(cl->cl_cpg) / ffg->iff_chunksize + 1; | |
586 | ||
587 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) { | |
588 | rec = &(cl->cl_recs[i]); | |
589 | status = ocfs2_info_freefrag_scan_chain(osb, gb_inode, | |
590 | gb_dinode, | |
591 | rec, ffg, | |
592 | chunks_in_group); | |
593 | if (status) | |
594 | goto bail; | |
595 | } | |
596 | ||
597 | if (ffg->iff_ffs.ffs_free_chunks_real) | |
598 | ffg->iff_ffs.ffs_avg = (ffg->iff_ffs.ffs_avg / | |
599 | ffg->iff_ffs.ffs_free_chunks_real); | |
600 | bail: | |
601 | if (unlock) | |
602 | ocfs2_inode_unlock(gb_inode, 0); | |
603 | ||
604 | if (gb_inode) | |
5955102c | 605 | inode_unlock(gb_inode); |
d24a10b9 | 606 | |
72865d92 | 607 | iput(gb_inode); |
d24a10b9 TY |
608 | brelse(bh); |
609 | ||
610 | return status; | |
611 | } | |
612 | ||
c253ed1f FF |
613 | static int ocfs2_info_handle_freefrag(struct inode *inode, |
614 | struct ocfs2_info_request __user *req) | |
d24a10b9 TY |
615 | { |
616 | u64 blkno = -1; | |
617 | char namebuf[40]; | |
2b462638 | 618 | int status, type = GLOBAL_BITMAP_SYSTEM_INODE; |
d24a10b9 TY |
619 | |
620 | struct ocfs2_info_freefrag *oiff; | |
621 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
622 | struct inode *gb_inode = NULL; | |
623 | ||
624 | oiff = kzalloc(sizeof(struct ocfs2_info_freefrag), GFP_KERNEL); | |
625 | if (!oiff) { | |
626 | status = -ENOMEM; | |
627 | mlog_errno(status); | |
87f0d5c8 | 628 | goto out_err; |
d24a10b9 TY |
629 | } |
630 | ||
2b462638 BH |
631 | if (o2info_from_user(*oiff, req)) { |
632 | status = -EFAULT; | |
633 | goto out_free; | |
634 | } | |
d24a10b9 TY |
635 | /* |
636 | * chunksize from userspace should be power of 2. | |
637 | */ | |
638 | if ((oiff->iff_chunksize & (oiff->iff_chunksize - 1)) || | |
639 | (!oiff->iff_chunksize)) { | |
640 | status = -EINVAL; | |
641 | goto bail; | |
642 | } | |
643 | ||
644 | if (o2info_coherent(&oiff->iff_req)) { | |
645 | gb_inode = ocfs2_get_system_file_inode(osb, type, | |
646 | OCFS2_INVALID_SLOT); | |
647 | if (!gb_inode) { | |
648 | mlog(ML_ERROR, "unable to get global_bitmap inode\n"); | |
649 | status = -EIO; | |
650 | goto bail; | |
651 | } | |
652 | } else { | |
653 | ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type, | |
654 | OCFS2_INVALID_SLOT); | |
655 | status = ocfs2_lookup_ino_from_name(osb->sys_root_inode, | |
656 | namebuf, | |
657 | strlen(namebuf), | |
658 | &blkno); | |
659 | if (status < 0) { | |
660 | status = -ENOENT; | |
661 | goto bail; | |
662 | } | |
663 | } | |
664 | ||
665 | status = ocfs2_info_freefrag_scan_bitmap(osb, gb_inode, blkno, oiff); | |
666 | if (status < 0) | |
667 | goto bail; | |
668 | ||
669 | o2info_set_request_filled(&oiff->iff_req); | |
670 | ||
7ebab453 WY |
671 | if (o2info_to_user(*oiff, req)) { |
672 | status = -EFAULT; | |
2b462638 | 673 | goto out_free; |
7ebab453 | 674 | } |
d24a10b9 TY |
675 | |
676 | status = 0; | |
677 | bail: | |
678 | if (status) | |
679 | o2info_set_request_error(&oiff->iff_req, req); | |
2b462638 | 680 | out_free: |
d24a10b9 | 681 | kfree(oiff); |
87f0d5c8 | 682 | out_err: |
ddee5cdb TY |
683 | return status; |
684 | } | |
685 | ||
c253ed1f FF |
686 | static int ocfs2_info_handle_unknown(struct inode *inode, |
687 | struct ocfs2_info_request __user *req) | |
ddee5cdb | 688 | { |
ddee5cdb TY |
689 | struct ocfs2_info_request oir; |
690 | ||
691 | if (o2info_from_user(oir, req)) | |
2b462638 | 692 | return -EFAULT; |
ddee5cdb | 693 | |
8aa1fa36 | 694 | o2info_clear_request_filled(&oir); |
ddee5cdb TY |
695 | |
696 | if (o2info_to_user(oir, req)) | |
2b462638 | 697 | return -EFAULT; |
ddee5cdb | 698 | |
2b462638 | 699 | return 0; |
ddee5cdb TY |
700 | } |
701 | ||
702 | /* | |
703 | * Validate and distinguish OCFS2_IOC_INFO requests. | |
704 | * | |
705 | * - validate the magic number. | |
706 | * - distinguish different requests. | |
707 | * - validate size of different requests. | |
708 | */ | |
c253ed1f FF |
709 | static int ocfs2_info_handle_request(struct inode *inode, |
710 | struct ocfs2_info_request __user *req) | |
ddee5cdb TY |
711 | { |
712 | int status = -EFAULT; | |
713 | struct ocfs2_info_request oir; | |
714 | ||
715 | if (o2info_from_user(oir, req)) | |
716 | goto bail; | |
717 | ||
718 | status = -EINVAL; | |
719 | if (oir.ir_magic != OCFS2_INFO_MAGIC) | |
720 | goto bail; | |
721 | ||
722 | switch (oir.ir_code) { | |
723 | case OCFS2_INFO_BLOCKSIZE: | |
724 | if (oir.ir_size == sizeof(struct ocfs2_info_blocksize)) | |
725 | status = ocfs2_info_handle_blocksize(inode, req); | |
726 | break; | |
727 | case OCFS2_INFO_CLUSTERSIZE: | |
728 | if (oir.ir_size == sizeof(struct ocfs2_info_clustersize)) | |
729 | status = ocfs2_info_handle_clustersize(inode, req); | |
730 | break; | |
731 | case OCFS2_INFO_MAXSLOTS: | |
732 | if (oir.ir_size == sizeof(struct ocfs2_info_maxslots)) | |
733 | status = ocfs2_info_handle_maxslots(inode, req); | |
734 | break; | |
735 | case OCFS2_INFO_LABEL: | |
736 | if (oir.ir_size == sizeof(struct ocfs2_info_label)) | |
737 | status = ocfs2_info_handle_label(inode, req); | |
738 | break; | |
739 | case OCFS2_INFO_UUID: | |
740 | if (oir.ir_size == sizeof(struct ocfs2_info_uuid)) | |
741 | status = ocfs2_info_handle_uuid(inode, req); | |
742 | break; | |
743 | case OCFS2_INFO_FS_FEATURES: | |
744 | if (oir.ir_size == sizeof(struct ocfs2_info_fs_features)) | |
745 | status = ocfs2_info_handle_fs_features(inode, req); | |
746 | break; | |
747 | case OCFS2_INFO_JOURNAL_SIZE: | |
748 | if (oir.ir_size == sizeof(struct ocfs2_info_journal_size)) | |
749 | status = ocfs2_info_handle_journal_size(inode, req); | |
750 | break; | |
3e5db17d TY |
751 | case OCFS2_INFO_FREEINODE: |
752 | if (oir.ir_size == sizeof(struct ocfs2_info_freeinode)) | |
753 | status = ocfs2_info_handle_freeinode(inode, req); | |
754 | break; | |
d24a10b9 TY |
755 | case OCFS2_INFO_FREEFRAG: |
756 | if (oir.ir_size == sizeof(struct ocfs2_info_freefrag)) | |
757 | status = ocfs2_info_handle_freefrag(inode, req); | |
758 | break; | |
ddee5cdb TY |
759 | default: |
760 | status = ocfs2_info_handle_unknown(inode, req); | |
761 | break; | |
762 | } | |
763 | ||
764 | bail: | |
765 | return status; | |
766 | } | |
767 | ||
c253ed1f FF |
768 | static int ocfs2_get_request_ptr(struct ocfs2_info *info, int idx, |
769 | u64 *req_addr, int compat_flag) | |
ddee5cdb TY |
770 | { |
771 | int status = -EFAULT; | |
772 | u64 __user *bp = NULL; | |
773 | ||
774 | if (compat_flag) { | |
775 | #ifdef CONFIG_COMPAT | |
776 | /* | |
777 | * pointer bp stores the base address of a pointers array, | |
778 | * which collects all addresses of separate request. | |
779 | */ | |
780 | bp = (u64 __user *)(unsigned long)compat_ptr(info->oi_requests); | |
781 | #else | |
782 | BUG(); | |
783 | #endif | |
784 | } else | |
785 | bp = (u64 __user *)(unsigned long)(info->oi_requests); | |
786 | ||
787 | if (o2info_from_user(*req_addr, bp + idx)) | |
788 | goto bail; | |
789 | ||
790 | status = 0; | |
791 | bail: | |
792 | return status; | |
793 | } | |
794 | ||
795 | /* | |
796 | * OCFS2_IOC_INFO handles an array of requests passed from userspace. | |
797 | * | |
798 | * ocfs2_info_handle() recevies a large info aggregation, grab and | |
799 | * validate the request count from header, then break it into small | |
800 | * pieces, later specific handlers can handle them one by one. | |
801 | * | |
802 | * Idea here is to make each separate request small enough to ensure | |
803 | * a better backward&forward compatibility, since a small piece of | |
804 | * request will be less likely to be broken if disk layout get changed. | |
805 | */ | |
c253ed1f FF |
806 | static int ocfs2_info_handle(struct inode *inode, struct ocfs2_info *info, |
807 | int compat_flag) | |
ddee5cdb TY |
808 | { |
809 | int i, status = 0; | |
810 | u64 req_addr; | |
811 | struct ocfs2_info_request __user *reqp; | |
812 | ||
813 | if ((info->oi_count > OCFS2_INFO_MAX_REQUEST) || | |
814 | (!info->oi_requests)) { | |
815 | status = -EINVAL; | |
816 | goto bail; | |
817 | } | |
818 | ||
819 | for (i = 0; i < info->oi_count; i++) { | |
820 | ||
821 | status = ocfs2_get_request_ptr(info, i, &req_addr, compat_flag); | |
822 | if (status) | |
823 | break; | |
824 | ||
f6a56903 | 825 | reqp = (struct ocfs2_info_request __user *)(unsigned long)req_addr; |
ddee5cdb TY |
826 | if (!reqp) { |
827 | status = -EINVAL; | |
828 | goto bail; | |
829 | } | |
830 | ||
831 | status = ocfs2_info_handle_request(inode, reqp); | |
832 | if (status) | |
833 | break; | |
834 | } | |
835 | ||
836 | bail: | |
837 | return status; | |
838 | } | |
839 | ||
c9ec1488 | 840 | long ocfs2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) |
ca4d147e | 841 | { |
496ad9aa | 842 | struct inode *inode = file_inode(filp); |
d659072f | 843 | int new_clusters; |
ca4d147e | 844 | int status; |
b2580103 | 845 | struct ocfs2_space_resv sr; |
7909f2bf | 846 | struct ocfs2_new_group_input input; |
bd50873d | 847 | struct reflink_arguments args; |
f6a56903 AV |
848 | const char __user *old_path; |
849 | const char __user *new_path; | |
bd50873d | 850 | bool preserve; |
ddee5cdb | 851 | struct ocfs2_info info; |
f6a56903 | 852 | void __user *argp = (void __user *)arg; |
ca4d147e HP |
853 | |
854 | switch (cmd) { | |
b2580103 MF |
855 | case OCFS2_IOC_RESVSP: |
856 | case OCFS2_IOC_RESVSP64: | |
857 | case OCFS2_IOC_UNRESVSP: | |
858 | case OCFS2_IOC_UNRESVSP64: | |
859 | if (copy_from_user(&sr, (int __user *) arg, sizeof(sr))) | |
860 | return -EFAULT; | |
861 | ||
862 | return ocfs2_change_file_space(filp, cmd, &sr); | |
d659072f | 863 | case OCFS2_IOC_GROUP_EXTEND: |
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; | |
7909f2bf TM |
876 | case OCFS2_IOC_GROUP_ADD: |
877 | case OCFS2_IOC_GROUP_ADD64: | |
0957f007 MF |
878 | if (!capable(CAP_SYS_RESOURCE)) |
879 | return -EPERM; | |
880 | ||
7909f2bf TM |
881 | if (copy_from_user(&input, (int __user *) arg, sizeof(input))) |
882 | return -EFAULT; | |
883 | ||
fef6925c JK |
884 | status = mnt_want_write_file(filp); |
885 | if (status) | |
886 | return status; | |
887 | status = ocfs2_group_add(inode, &input); | |
888 | mnt_drop_write_file(filp); | |
889 | return status; | |
bd50873d | 890 | case OCFS2_IOC_REFLINK: |
f6a56903 | 891 | if (copy_from_user(&args, argp, sizeof(args))) |
bd50873d | 892 | return -EFAULT; |
f6a56903 AV |
893 | old_path = (const char __user *)(unsigned long)args.old_path; |
894 | new_path = (const char __user *)(unsigned long)args.new_path; | |
bd50873d TM |
895 | preserve = (args.preserve != 0); |
896 | ||
897 | return ocfs2_reflink_ioctl(inode, old_path, new_path, preserve); | |
ddee5cdb | 898 | case OCFS2_IOC_INFO: |
f6a56903 | 899 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
900 | return -EFAULT; |
901 | ||
902 | return ocfs2_info_handle(inode, &info, 0); | |
55e67872 TM |
903 | case FITRIM: |
904 | { | |
905 | struct super_block *sb = inode->i_sb; | |
19e8ac27 | 906 | struct request_queue *q = bdev_get_queue(sb->s_bdev); |
55e67872 TM |
907 | struct fstrim_range range; |
908 | int ret = 0; | |
909 | ||
910 | if (!capable(CAP_SYS_ADMIN)) | |
911 | return -EPERM; | |
912 | ||
19e8ac27 JL |
913 | if (!blk_queue_discard(q)) |
914 | return -EOPNOTSUPP; | |
915 | ||
f6a56903 | 916 | if (copy_from_user(&range, argp, sizeof(range))) |
55e67872 TM |
917 | return -EFAULT; |
918 | ||
1ba2212b JL |
919 | range.minlen = max_t(u64, q->limits.discard_granularity, |
920 | range.minlen); | |
55e67872 TM |
921 | ret = ocfs2_trim_fs(sb, &range); |
922 | if (ret < 0) | |
923 | return ret; | |
924 | ||
f6a56903 | 925 | if (copy_to_user(argp, &range, sizeof(range))) |
55e67872 TM |
926 | return -EFAULT; |
927 | ||
928 | return 0; | |
929 | } | |
53069d4e | 930 | case OCFS2_IOC_MOVE_EXT: |
f6a56903 | 931 | return ocfs2_ioctl_move_extents(filp, argp); |
ca4d147e HP |
932 | default: |
933 | return -ENOTTY; | |
934 | } | |
935 | } | |
936 | ||
586d232b MF |
937 | #ifdef CONFIG_COMPAT |
938 | long ocfs2_compat_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
939 | { | |
34e6c59a TM |
940 | bool preserve; |
941 | struct reflink_arguments args; | |
496ad9aa | 942 | struct inode *inode = file_inode(file); |
ddee5cdb | 943 | struct ocfs2_info info; |
f6a56903 | 944 | void __user *argp = (void __user *)arg; |
34e6c59a | 945 | |
586d232b | 946 | switch (cmd) { |
b2580103 MF |
947 | case OCFS2_IOC_RESVSP: |
948 | case OCFS2_IOC_RESVSP64: | |
949 | case OCFS2_IOC_UNRESVSP: | |
950 | case OCFS2_IOC_UNRESVSP64: | |
d659072f | 951 | case OCFS2_IOC_GROUP_EXTEND: |
7909f2bf TM |
952 | case OCFS2_IOC_GROUP_ADD: |
953 | case OCFS2_IOC_GROUP_ADD64: | |
b2580103 | 954 | break; |
34e6c59a | 955 | case OCFS2_IOC_REFLINK: |
f6a56903 | 956 | if (copy_from_user(&args, argp, sizeof(args))) |
34e6c59a TM |
957 | return -EFAULT; |
958 | preserve = (args.preserve != 0); | |
959 | ||
960 | return ocfs2_reflink_ioctl(inode, compat_ptr(args.old_path), | |
961 | compat_ptr(args.new_path), preserve); | |
ddee5cdb | 962 | case OCFS2_IOC_INFO: |
f6a56903 | 963 | if (copy_from_user(&info, argp, sizeof(struct ocfs2_info))) |
ddee5cdb TY |
964 | return -EFAULT; |
965 | ||
966 | return ocfs2_info_handle(inode, &info, 1); | |
314999dc | 967 | case FITRIM: |
53069d4e TY |
968 | case OCFS2_IOC_MOVE_EXT: |
969 | break; | |
586d232b MF |
970 | default: |
971 | return -ENOIOCTLCMD; | |
972 | } | |
973 | ||
c9ec1488 | 974 | return ocfs2_ioctl(file, cmd, arg); |
586d232b MF |
975 | } |
976 | #endif |