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1802d0be | 1 | // SPDX-License-Identifier: GPL-2.0-only |
028ba5df TY |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * move_extents.c | |
6 | * | |
7 | * Copyright (C) 2011 Oracle. All rights reserved. | |
028ba5df TY |
8 | */ |
9 | #include <linux/fs.h> | |
10 | #include <linux/types.h> | |
11 | #include <linux/mount.h> | |
12 | #include <linux/swap.h> | |
13 | ||
14 | #include <cluster/masklog.h> | |
15 | ||
16 | #include "ocfs2.h" | |
17 | #include "ocfs2_ioctl.h" | |
18 | ||
19 | #include "alloc.h" | |
6194ae42 | 20 | #include "localalloc.h" |
028ba5df TY |
21 | #include "aops.h" |
22 | #include "dlmglue.h" | |
23 | #include "extent_map.h" | |
24 | #include "inode.h" | |
25 | #include "journal.h" | |
26 | #include "suballoc.h" | |
27 | #include "uptodate.h" | |
28 | #include "super.h" | |
29 | #include "dir.h" | |
30 | #include "buffer_head_io.h" | |
31 | #include "sysfile.h" | |
028ba5df TY |
32 | #include "refcounttree.h" |
33 | #include "move_extents.h" | |
34 | ||
35 | struct ocfs2_move_extents_context { | |
36 | struct inode *inode; | |
37 | struct file *file; | |
38 | int auto_defrag; | |
4dfa66bd | 39 | int partial; |
028ba5df TY |
40 | int credits; |
41 | u32 new_phys_cpos; | |
42 | u32 clusters_moved; | |
43 | u64 refcount_loc; | |
44 | struct ocfs2_move_extents *range; | |
45 | struct ocfs2_extent_tree et; | |
46 | struct ocfs2_alloc_context *meta_ac; | |
47 | struct ocfs2_alloc_context *data_ac; | |
48 | struct ocfs2_cached_dealloc_ctxt dealloc; | |
49 | }; | |
de474ee8 | 50 | |
8f603e56 TY |
51 | static int __ocfs2_move_extent(handle_t *handle, |
52 | struct ocfs2_move_extents_context *context, | |
53 | u32 cpos, u32 len, u32 p_cpos, u32 new_p_cpos, | |
54 | int ext_flags) | |
55 | { | |
56 | int ret = 0, index; | |
57 | struct inode *inode = context->inode; | |
58 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
59 | struct ocfs2_extent_rec *rec, replace_rec; | |
60 | struct ocfs2_path *path = NULL; | |
61 | struct ocfs2_extent_list *el; | |
62 | u64 ino = ocfs2_metadata_cache_owner(context->et.et_ci); | |
63 | u64 old_blkno = ocfs2_clusters_to_blocks(inode->i_sb, p_cpos); | |
64 | ||
c7dd3392 | 65 | ret = ocfs2_duplicate_clusters_by_page(handle, inode, cpos, |
8f603e56 TY |
66 | p_cpos, new_p_cpos, len); |
67 | if (ret) { | |
68 | mlog_errno(ret); | |
69 | goto out; | |
70 | } | |
71 | ||
72 | memset(&replace_rec, 0, sizeof(replace_rec)); | |
73 | replace_rec.e_cpos = cpu_to_le32(cpos); | |
74 | replace_rec.e_leaf_clusters = cpu_to_le16(len); | |
75 | replace_rec.e_blkno = cpu_to_le64(ocfs2_clusters_to_blocks(inode->i_sb, | |
76 | new_p_cpos)); | |
77 | ||
78 | path = ocfs2_new_path_from_et(&context->et); | |
79 | if (!path) { | |
80 | ret = -ENOMEM; | |
81 | mlog_errno(ret); | |
82 | goto out; | |
83 | } | |
84 | ||
85 | ret = ocfs2_find_path(INODE_CACHE(inode), path, cpos); | |
86 | if (ret) { | |
87 | mlog_errno(ret); | |
88 | goto out; | |
89 | } | |
90 | ||
91 | el = path_leaf_el(path); | |
92 | ||
93 | index = ocfs2_search_extent_list(el, cpos); | |
981035b4 | 94 | if (index == -1) { |
17a5b9ab | 95 | ret = ocfs2_error(inode->i_sb, |
7ecef14a JP |
96 | "Inode %llu has an extent at cpos %u which can no longer be found\n", |
97 | (unsigned long long)ino, cpos); | |
8f603e56 TY |
98 | goto out; |
99 | } | |
100 | ||
101 | rec = &el->l_recs[index]; | |
102 | ||
103 | BUG_ON(ext_flags != rec->e_flags); | |
104 | /* | |
105 | * after moving/defraging to new location, the extent is not going | |
106 | * to be refcounted anymore. | |
107 | */ | |
108 | replace_rec.e_flags = ext_flags & ~OCFS2_EXT_REFCOUNTED; | |
109 | ||
110 | ret = ocfs2_journal_access_di(handle, INODE_CACHE(inode), | |
111 | context->et.et_root_bh, | |
112 | OCFS2_JOURNAL_ACCESS_WRITE); | |
113 | if (ret) { | |
114 | mlog_errno(ret); | |
115 | goto out; | |
116 | } | |
117 | ||
118 | ret = ocfs2_split_extent(handle, &context->et, path, index, | |
119 | &replace_rec, context->meta_ac, | |
120 | &context->dealloc); | |
121 | if (ret) { | |
122 | mlog_errno(ret); | |
123 | goto out; | |
124 | } | |
125 | ||
126 | ocfs2_journal_dirty(handle, context->et.et_root_bh); | |
127 | ||
128 | context->new_phys_cpos = new_p_cpos; | |
129 | ||
130 | /* | |
131 | * need I to append truncate log for old clusters? | |
132 | */ | |
133 | if (old_blkno) { | |
134 | if (ext_flags & OCFS2_EXT_REFCOUNTED) | |
135 | ret = ocfs2_decrease_refcount(inode, handle, | |
136 | ocfs2_blocks_to_clusters(osb->sb, | |
137 | old_blkno), | |
138 | len, context->meta_ac, | |
139 | &context->dealloc, 1); | |
140 | else | |
141 | ret = ocfs2_truncate_log_append(osb, handle, | |
142 | old_blkno, len); | |
143 | } | |
144 | ||
6fdb702d | 145 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
8f603e56 | 146 | out: |
4704aa30 | 147 | ocfs2_free_path(path); |
8f603e56 TY |
148 | return ret; |
149 | } | |
150 | ||
de474ee8 | 151 | /* |
e21e5744 LC |
152 | * lock allocator, and reserve appropriate number of bits for |
153 | * meta blocks. | |
de474ee8 | 154 | */ |
e21e5744 | 155 | static int ocfs2_lock_meta_allocator_move_extents(struct inode *inode, |
de474ee8 TY |
156 | struct ocfs2_extent_tree *et, |
157 | u32 clusters_to_move, | |
158 | u32 extents_to_split, | |
159 | struct ocfs2_alloc_context **meta_ac, | |
de474ee8 TY |
160 | int extra_blocks, |
161 | int *credits) | |
162 | { | |
163 | int ret, num_free_extents; | |
164 | unsigned int max_recs_needed = 2 * extents_to_split + clusters_to_move; | |
165 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
166 | ||
964f14a0 | 167 | num_free_extents = ocfs2_num_free_extents(et); |
de474ee8 TY |
168 | if (num_free_extents < 0) { |
169 | ret = num_free_extents; | |
170 | mlog_errno(ret); | |
171 | goto out; | |
172 | } | |
173 | ||
174 | if (!num_free_extents || | |
175 | (ocfs2_sparse_alloc(osb) && num_free_extents < max_recs_needed)) | |
176 | extra_blocks += ocfs2_extend_meta_needed(et->et_root_el); | |
177 | ||
178 | ret = ocfs2_reserve_new_metadata_blocks(osb, extra_blocks, meta_ac); | |
179 | if (ret) { | |
180 | mlog_errno(ret); | |
181 | goto out; | |
182 | } | |
183 | ||
de474ee8 | 184 | |
06f9da6e | 185 | *credits += ocfs2_calc_extend_credits(osb->sb, et->et_root_el); |
de474ee8 TY |
186 | |
187 | mlog(0, "reserve metadata_blocks: %d, data_clusters: %u, credits: %d\n", | |
188 | extra_blocks, clusters_to_move, *credits); | |
189 | out: | |
190 | if (ret) { | |
191 | if (*meta_ac) { | |
192 | ocfs2_free_alloc_context(*meta_ac); | |
193 | *meta_ac = NULL; | |
194 | } | |
195 | } | |
196 | ||
197 | return ret; | |
198 | } | |
202ee5fa TY |
199 | |
200 | /* | |
201 | * Using one journal handle to guarantee the data consistency in case | |
202 | * crash happens anywhere. | |
dda54e76 TY |
203 | * |
204 | * XXX: defrag can end up with finishing partial extent as requested, | |
205 | * due to not enough contiguous clusters can be found in allocator. | |
202ee5fa TY |
206 | */ |
207 | static int ocfs2_defrag_extent(struct ocfs2_move_extents_context *context, | |
4dfa66bd | 208 | u32 cpos, u32 phys_cpos, u32 *len, int ext_flags) |
202ee5fa | 209 | { |
4dfa66bd | 210 | int ret, credits = 0, extra_blocks = 0, partial = context->partial; |
202ee5fa TY |
211 | handle_t *handle; |
212 | struct inode *inode = context->inode; | |
213 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
214 | struct inode *tl_inode = osb->osb_tl_inode; | |
215 | struct ocfs2_refcount_tree *ref_tree = NULL; | |
216 | u32 new_phys_cpos, new_len; | |
217 | u64 phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
6194ae42 | 218 | int need_free = 0; |
202ee5fa | 219 | |
4dfa66bd | 220 | if ((ext_flags & OCFS2_EXT_REFCOUNTED) && *len) { |
84e40080 | 221 | BUG_ON(!ocfs2_is_refcount_inode(inode)); |
202ee5fa TY |
222 | BUG_ON(!context->refcount_loc); |
223 | ||
224 | ret = ocfs2_lock_refcount_tree(osb, context->refcount_loc, 1, | |
225 | &ref_tree, NULL); | |
226 | if (ret) { | |
227 | mlog_errno(ret); | |
228 | return ret; | |
229 | } | |
230 | ||
231 | ret = ocfs2_prepare_refcount_change_for_del(inode, | |
232 | context->refcount_loc, | |
233 | phys_blkno, | |
4dfa66bd | 234 | *len, |
202ee5fa TY |
235 | &credits, |
236 | &extra_blocks); | |
237 | if (ret) { | |
238 | mlog_errno(ret); | |
239 | goto out; | |
240 | } | |
241 | } | |
242 | ||
e21e5744 LC |
243 | ret = ocfs2_lock_meta_allocator_move_extents(inode, &context->et, |
244 | *len, 1, | |
245 | &context->meta_ac, | |
246 | extra_blocks, &credits); | |
202ee5fa TY |
247 | if (ret) { |
248 | mlog_errno(ret); | |
249 | goto out; | |
250 | } | |
251 | ||
252 | /* | |
253 | * should be using allocation reservation strategy there? | |
254 | * | |
255 | * if (context->data_ac) | |
256 | * context->data_ac->ac_resv = &OCFS2_I(inode)->ip_la_data_resv; | |
257 | */ | |
258 | ||
5955102c | 259 | inode_lock(tl_inode); |
202ee5fa TY |
260 | |
261 | if (ocfs2_truncate_log_needs_flush(osb)) { | |
262 | ret = __ocfs2_flush_truncate_log(osb); | |
263 | if (ret < 0) { | |
264 | mlog_errno(ret); | |
265 | goto out_unlock_mutex; | |
266 | } | |
267 | } | |
268 | ||
e21e5744 LC |
269 | /* |
270 | * Make sure ocfs2_reserve_cluster is called after | |
271 | * __ocfs2_flush_truncate_log, otherwise, dead lock may happen. | |
272 | * | |
273 | * If ocfs2_reserve_cluster is called | |
274 | * before __ocfs2_flush_truncate_log, dead lock on global bitmap | |
275 | * may happen. | |
276 | * | |
277 | */ | |
278 | ret = ocfs2_reserve_clusters(osb, *len, &context->data_ac); | |
279 | if (ret) { | |
280 | mlog_errno(ret); | |
281 | goto out_unlock_mutex; | |
282 | } | |
283 | ||
202ee5fa TY |
284 | handle = ocfs2_start_trans(osb, credits); |
285 | if (IS_ERR(handle)) { | |
286 | ret = PTR_ERR(handle); | |
287 | mlog_errno(ret); | |
288 | goto out_unlock_mutex; | |
289 | } | |
290 | ||
4dfa66bd | 291 | ret = __ocfs2_claim_clusters(handle, context->data_ac, 1, *len, |
202ee5fa TY |
292 | &new_phys_cpos, &new_len); |
293 | if (ret) { | |
294 | mlog_errno(ret); | |
295 | goto out_commit; | |
296 | } | |
297 | ||
298 | /* | |
4dfa66bd TY |
299 | * allowing partial extent moving is kind of 'pros and cons', it makes |
300 | * whole defragmentation less likely to fail, on the contrary, the bad | |
301 | * thing is it may make the fs even more fragmented after moving, let | |
302 | * userspace make a good decision here. | |
202ee5fa | 303 | */ |
4dfa66bd TY |
304 | if (new_len != *len) { |
305 | mlog(0, "len_claimed: %u, len: %u\n", new_len, *len); | |
306 | if (!partial) { | |
307 | context->range->me_flags &= ~OCFS2_MOVE_EXT_FL_COMPLETE; | |
308 | ret = -ENOSPC; | |
6194ae42 | 309 | need_free = 1; |
4dfa66bd TY |
310 | goto out_commit; |
311 | } | |
202ee5fa TY |
312 | } |
313 | ||
314 | mlog(0, "cpos: %u, phys_cpos: %u, new_phys_cpos: %u\n", cpos, | |
315 | phys_cpos, new_phys_cpos); | |
316 | ||
4dfa66bd | 317 | ret = __ocfs2_move_extent(handle, context, cpos, new_len, phys_cpos, |
202ee5fa TY |
318 | new_phys_cpos, ext_flags); |
319 | if (ret) | |
320 | mlog_errno(ret); | |
321 | ||
4dfa66bd TY |
322 | if (partial && (new_len != *len)) |
323 | *len = new_len; | |
324 | ||
202ee5fa TY |
325 | /* |
326 | * Here we should write the new page out first if we are | |
327 | * in write-back mode. | |
328 | */ | |
4dfa66bd | 329 | ret = ocfs2_cow_sync_writeback(inode->i_sb, context->inode, cpos, *len); |
202ee5fa TY |
330 | if (ret) |
331 | mlog_errno(ret); | |
332 | ||
333 | out_commit: | |
6194ae42 LC |
334 | if (need_free && context->data_ac) { |
335 | struct ocfs2_alloc_context *data_ac = context->data_ac; | |
336 | ||
337 | if (context->data_ac->ac_which == OCFS2_AC_USE_LOCAL) | |
338 | ocfs2_free_local_alloc_bits(osb, handle, data_ac, | |
339 | new_phys_cpos, new_len); | |
340 | else | |
341 | ocfs2_free_clusters(handle, | |
342 | data_ac->ac_inode, | |
343 | data_ac->ac_bh, | |
344 | ocfs2_clusters_to_blocks(osb->sb, new_phys_cpos), | |
345 | new_len); | |
346 | } | |
347 | ||
202ee5fa TY |
348 | ocfs2_commit_trans(osb, handle); |
349 | ||
350 | out_unlock_mutex: | |
5955102c | 351 | inode_unlock(tl_inode); |
202ee5fa TY |
352 | |
353 | if (context->data_ac) { | |
354 | ocfs2_free_alloc_context(context->data_ac); | |
355 | context->data_ac = NULL; | |
356 | } | |
357 | ||
358 | if (context->meta_ac) { | |
359 | ocfs2_free_alloc_context(context->meta_ac); | |
360 | context->meta_ac = NULL; | |
361 | } | |
362 | ||
363 | out: | |
364 | if (ref_tree) | |
365 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
366 | ||
367 | return ret; | |
368 | } | |
1c06b912 TY |
369 | |
370 | /* | |
371 | * find the victim alloc group, where #blkno fits. | |
372 | */ | |
373 | static int ocfs2_find_victim_alloc_group(struct inode *inode, | |
374 | u64 vict_blkno, | |
375 | int type, int slot, | |
376 | int *vict_bit, | |
377 | struct buffer_head **ret_bh) | |
378 | { | |
6aea6f50 | 379 | int ret, i, bits_per_unit = 0; |
1c06b912 TY |
380 | u64 blkno; |
381 | char namebuf[40]; | |
382 | ||
383 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
384 | struct buffer_head *ac_bh = NULL, *gd_bh = NULL; | |
385 | struct ocfs2_chain_list *cl; | |
386 | struct ocfs2_chain_rec *rec; | |
387 | struct ocfs2_dinode *ac_dinode; | |
388 | struct ocfs2_group_desc *bg; | |
389 | ||
390 | ocfs2_sprintf_system_inode_name(namebuf, sizeof(namebuf), type, slot); | |
391 | ret = ocfs2_lookup_ino_from_name(osb->sys_root_inode, namebuf, | |
392 | strlen(namebuf), &blkno); | |
393 | if (ret) { | |
394 | ret = -ENOENT; | |
395 | goto out; | |
396 | } | |
397 | ||
398 | ret = ocfs2_read_blocks_sync(osb, blkno, 1, &ac_bh); | |
399 | if (ret) { | |
400 | mlog_errno(ret); | |
401 | goto out; | |
402 | } | |
403 | ||
404 | ac_dinode = (struct ocfs2_dinode *)ac_bh->b_data; | |
405 | cl = &(ac_dinode->id2.i_chain); | |
406 | rec = &(cl->cl_recs[0]); | |
407 | ||
408 | if (type == GLOBAL_BITMAP_SYSTEM_INODE) | |
6aea6f50 TY |
409 | bits_per_unit = osb->s_clustersize_bits - |
410 | inode->i_sb->s_blocksize_bits; | |
1c06b912 TY |
411 | /* |
412 | * 'vict_blkno' was out of the valid range. | |
413 | */ | |
414 | if ((vict_blkno < le64_to_cpu(rec->c_blkno)) || | |
7fa05c6e | 415 | (vict_blkno >= ((u64)le32_to_cpu(ac_dinode->id1.bitmap1.i_total) << |
6aea6f50 | 416 | bits_per_unit))) { |
1c06b912 TY |
417 | ret = -EINVAL; |
418 | goto out; | |
419 | } | |
420 | ||
421 | for (i = 0; i < le16_to_cpu(cl->cl_next_free_rec); i++) { | |
422 | ||
423 | rec = &(cl->cl_recs[i]); | |
424 | if (!rec) | |
425 | continue; | |
426 | ||
427 | bg = NULL; | |
428 | ||
429 | do { | |
430 | if (!bg) | |
431 | blkno = le64_to_cpu(rec->c_blkno); | |
432 | else | |
433 | blkno = le64_to_cpu(bg->bg_next_group); | |
434 | ||
435 | if (gd_bh) { | |
436 | brelse(gd_bh); | |
437 | gd_bh = NULL; | |
438 | } | |
439 | ||
440 | ret = ocfs2_read_blocks_sync(osb, blkno, 1, &gd_bh); | |
441 | if (ret) { | |
442 | mlog_errno(ret); | |
443 | goto out; | |
444 | } | |
445 | ||
446 | bg = (struct ocfs2_group_desc *)gd_bh->b_data; | |
447 | ||
448 | if (vict_blkno < (le64_to_cpu(bg->bg_blkno) + | |
449 | le16_to_cpu(bg->bg_bits))) { | |
450 | ||
451 | *ret_bh = gd_bh; | |
6aea6f50 TY |
452 | *vict_bit = (vict_blkno - blkno) >> |
453 | bits_per_unit; | |
1c06b912 TY |
454 | mlog(0, "find the victim group: #%llu, " |
455 | "total_bits: %u, vict_bit: %u\n", | |
456 | blkno, le16_to_cpu(bg->bg_bits), | |
457 | *vict_bit); | |
458 | goto out; | |
459 | } | |
460 | ||
461 | } while (le64_to_cpu(bg->bg_next_group)); | |
462 | } | |
463 | ||
464 | ret = -EINVAL; | |
465 | out: | |
466 | brelse(ac_bh); | |
467 | ||
468 | /* | |
469 | * caller has to release the gd_bh properly. | |
470 | */ | |
471 | return ret; | |
472 | } | |
99e4c750 TY |
473 | |
474 | /* | |
475 | * XXX: helper to validate and adjust moving goal. | |
476 | */ | |
477 | static int ocfs2_validate_and_adjust_move_goal(struct inode *inode, | |
478 | struct ocfs2_move_extents *range) | |
479 | { | |
480 | int ret, goal_bit = 0; | |
481 | ||
482 | struct buffer_head *gd_bh = NULL; | |
7f4804d4 | 483 | struct ocfs2_group_desc *bg; |
99e4c750 TY |
484 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); |
485 | int c_to_b = 1 << (osb->s_clustersize_bits - | |
486 | inode->i_sb->s_blocksize_bits); | |
487 | ||
ea5e1675 TY |
488 | /* |
489 | * make goal become cluster aligned. | |
490 | */ | |
491 | range->me_goal = ocfs2_block_to_cluster_start(inode->i_sb, | |
492 | range->me_goal); | |
99e4c750 TY |
493 | /* |
494 | * validate goal sits within global_bitmap, and return the victim | |
495 | * group desc | |
496 | */ | |
497 | ret = ocfs2_find_victim_alloc_group(inode, range->me_goal, | |
498 | GLOBAL_BITMAP_SYSTEM_INODE, | |
499 | OCFS2_INVALID_SLOT, | |
500 | &goal_bit, &gd_bh); | |
501 | if (ret) | |
502 | goto out; | |
503 | ||
504 | bg = (struct ocfs2_group_desc *)gd_bh->b_data; | |
505 | ||
7f4804d4 DC |
506 | /* |
507 | * moving goal is not allowd to start with a group desc blok(#0 blk) | |
508 | * let's compromise to the latter cluster. | |
509 | */ | |
510 | if (range->me_goal == le64_to_cpu(bg->bg_blkno)) | |
511 | range->me_goal += c_to_b; | |
512 | ||
99e4c750 TY |
513 | /* |
514 | * movement is not gonna cross two groups. | |
515 | */ | |
516 | if ((le16_to_cpu(bg->bg_bits) - goal_bit) * osb->s_clustersize < | |
517 | range->me_len) { | |
518 | ret = -EINVAL; | |
519 | goto out; | |
520 | } | |
521 | /* | |
522 | * more exact validations/adjustments will be performed later during | |
523 | * moving operation for each extent range. | |
524 | */ | |
525 | mlog(0, "extents get ready to be moved to #%llu block\n", | |
526 | range->me_goal); | |
527 | ||
528 | out: | |
529 | brelse(gd_bh); | |
530 | ||
531 | return ret; | |
532 | } | |
e6b5859c TY |
533 | |
534 | static void ocfs2_probe_alloc_group(struct inode *inode, struct buffer_head *bh, | |
535 | int *goal_bit, u32 move_len, u32 max_hop, | |
536 | u32 *phys_cpos) | |
537 | { | |
538 | int i, used, last_free_bits = 0, base_bit = *goal_bit; | |
539 | struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data; | |
540 | u32 base_cpos = ocfs2_blocks_to_clusters(inode->i_sb, | |
541 | le64_to_cpu(gd->bg_blkno)); | |
542 | ||
543 | for (i = base_bit; i < le16_to_cpu(gd->bg_bits); i++) { | |
544 | ||
545 | used = ocfs2_test_bit(i, (unsigned long *)gd->bg_bitmap); | |
546 | if (used) { | |
547 | /* | |
548 | * we even tried searching the free chunk by jumping | |
549 | * a 'max_hop' distance, but still failed. | |
550 | */ | |
551 | if ((i - base_bit) > max_hop) { | |
552 | *phys_cpos = 0; | |
553 | break; | |
554 | } | |
555 | ||
556 | if (last_free_bits) | |
557 | last_free_bits = 0; | |
558 | ||
559 | continue; | |
560 | } else | |
561 | last_free_bits++; | |
562 | ||
563 | if (last_free_bits == move_len) { | |
564 | *goal_bit = i; | |
565 | *phys_cpos = base_cpos + i; | |
566 | break; | |
567 | } | |
568 | } | |
569 | ||
570 | mlog(0, "found phys_cpos: %u to fit the wanted moving.\n", *phys_cpos); | |
571 | } | |
8473aa8a | 572 | |
e0847717 TY |
573 | static int ocfs2_move_extent(struct ocfs2_move_extents_context *context, |
574 | u32 cpos, u32 phys_cpos, u32 *new_phys_cpos, | |
575 | u32 len, int ext_flags) | |
576 | { | |
577 | int ret, credits = 0, extra_blocks = 0, goal_bit = 0; | |
578 | handle_t *handle; | |
579 | struct inode *inode = context->inode; | |
580 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
581 | struct inode *tl_inode = osb->osb_tl_inode; | |
582 | struct inode *gb_inode = NULL; | |
583 | struct buffer_head *gb_bh = NULL; | |
584 | struct buffer_head *gd_bh = NULL; | |
585 | struct ocfs2_group_desc *gd; | |
586 | struct ocfs2_refcount_tree *ref_tree = NULL; | |
587 | u32 move_max_hop = ocfs2_blocks_to_clusters(inode->i_sb, | |
588 | context->range->me_threshold); | |
589 | u64 phys_blkno, new_phys_blkno; | |
590 | ||
591 | phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, phys_cpos); | |
592 | ||
593 | if ((ext_flags & OCFS2_EXT_REFCOUNTED) && len) { | |
84e40080 | 594 | BUG_ON(!ocfs2_is_refcount_inode(inode)); |
e0847717 TY |
595 | BUG_ON(!context->refcount_loc); |
596 | ||
597 | ret = ocfs2_lock_refcount_tree(osb, context->refcount_loc, 1, | |
598 | &ref_tree, NULL); | |
599 | if (ret) { | |
600 | mlog_errno(ret); | |
601 | return ret; | |
602 | } | |
603 | ||
604 | ret = ocfs2_prepare_refcount_change_for_del(inode, | |
605 | context->refcount_loc, | |
606 | phys_blkno, | |
607 | len, | |
608 | &credits, | |
609 | &extra_blocks); | |
610 | if (ret) { | |
611 | mlog_errno(ret); | |
612 | goto out; | |
613 | } | |
614 | } | |
615 | ||
e21e5744 LC |
616 | ret = ocfs2_lock_meta_allocator_move_extents(inode, &context->et, |
617 | len, 1, | |
618 | &context->meta_ac, | |
619 | extra_blocks, &credits); | |
e0847717 TY |
620 | if (ret) { |
621 | mlog_errno(ret); | |
622 | goto out; | |
623 | } | |
624 | ||
625 | /* | |
626 | * need to count 2 extra credits for global_bitmap inode and | |
627 | * group descriptor. | |
628 | */ | |
629 | credits += OCFS2_INODE_UPDATE_CREDITS + 1; | |
630 | ||
631 | /* | |
632 | * ocfs2_move_extent() didn't reserve any clusters in lock_allocators() | |
633 | * logic, while we still need to lock the global_bitmap. | |
634 | */ | |
635 | gb_inode = ocfs2_get_system_file_inode(osb, GLOBAL_BITMAP_SYSTEM_INODE, | |
636 | OCFS2_INVALID_SLOT); | |
637 | if (!gb_inode) { | |
638 | mlog(ML_ERROR, "unable to get global_bitmap inode\n"); | |
639 | ret = -EIO; | |
640 | goto out; | |
641 | } | |
642 | ||
5955102c | 643 | inode_lock(gb_inode); |
e0847717 TY |
644 | |
645 | ret = ocfs2_inode_lock(gb_inode, &gb_bh, 1); | |
646 | if (ret) { | |
647 | mlog_errno(ret); | |
648 | goto out_unlock_gb_mutex; | |
649 | } | |
650 | ||
5955102c | 651 | inode_lock(tl_inode); |
e0847717 TY |
652 | |
653 | handle = ocfs2_start_trans(osb, credits); | |
654 | if (IS_ERR(handle)) { | |
655 | ret = PTR_ERR(handle); | |
656 | mlog_errno(ret); | |
657 | goto out_unlock_tl_inode; | |
658 | } | |
659 | ||
660 | new_phys_blkno = ocfs2_clusters_to_blocks(inode->i_sb, *new_phys_cpos); | |
661 | ret = ocfs2_find_victim_alloc_group(inode, new_phys_blkno, | |
662 | GLOBAL_BITMAP_SYSTEM_INODE, | |
663 | OCFS2_INVALID_SLOT, | |
664 | &goal_bit, &gd_bh); | |
665 | if (ret) { | |
666 | mlog_errno(ret); | |
667 | goto out_commit; | |
668 | } | |
669 | ||
670 | /* | |
671 | * probe the victim cluster group to find a proper | |
672 | * region to fit wanted movement, it even will perfrom | |
673 | * a best-effort attempt by compromising to a threshold | |
674 | * around the goal. | |
675 | */ | |
676 | ocfs2_probe_alloc_group(inode, gd_bh, &goal_bit, len, move_max_hop, | |
677 | new_phys_cpos); | |
3d75be7c | 678 | if (!*new_phys_cpos) { |
e0847717 TY |
679 | ret = -ENOSPC; |
680 | goto out_commit; | |
681 | } | |
682 | ||
683 | ret = __ocfs2_move_extent(handle, context, cpos, len, phys_cpos, | |
684 | *new_phys_cpos, ext_flags); | |
685 | if (ret) { | |
686 | mlog_errno(ret); | |
687 | goto out_commit; | |
688 | } | |
689 | ||
690 | gd = (struct ocfs2_group_desc *)gd_bh->b_data; | |
691 | ret = ocfs2_alloc_dinode_update_counts(gb_inode, handle, gb_bh, len, | |
692 | le16_to_cpu(gd->bg_chain)); | |
693 | if (ret) { | |
694 | mlog_errno(ret); | |
695 | goto out_commit; | |
696 | } | |
697 | ||
698 | ret = ocfs2_block_group_set_bits(handle, gb_inode, gd, gd_bh, | |
699 | goal_bit, len); | |
db66c715 YL |
700 | if (ret) { |
701 | ocfs2_rollback_alloc_dinode_counts(gb_inode, gb_bh, len, | |
702 | le16_to_cpu(gd->bg_chain)); | |
e0847717 | 703 | mlog_errno(ret); |
db66c715 | 704 | } |
e0847717 TY |
705 | |
706 | /* | |
707 | * Here we should write the new page out first if we are | |
708 | * in write-back mode. | |
709 | */ | |
710 | ret = ocfs2_cow_sync_writeback(inode->i_sb, context->inode, cpos, len); | |
711 | if (ret) | |
712 | mlog_errno(ret); | |
713 | ||
714 | out_commit: | |
715 | ocfs2_commit_trans(osb, handle); | |
716 | brelse(gd_bh); | |
717 | ||
718 | out_unlock_tl_inode: | |
5955102c | 719 | inode_unlock(tl_inode); |
e0847717 TY |
720 | |
721 | ocfs2_inode_unlock(gb_inode, 1); | |
722 | out_unlock_gb_mutex: | |
5955102c | 723 | inode_unlock(gb_inode); |
e0847717 TY |
724 | brelse(gb_bh); |
725 | iput(gb_inode); | |
726 | ||
727 | out: | |
728 | if (context->meta_ac) { | |
729 | ocfs2_free_alloc_context(context->meta_ac); | |
730 | context->meta_ac = NULL; | |
731 | } | |
732 | ||
733 | if (ref_tree) | |
734 | ocfs2_unlock_refcount_tree(osb, ref_tree, 1); | |
735 | ||
736 | return ret; | |
737 | } | |
ee16cc03 TY |
738 | |
739 | /* | |
740 | * Helper to calculate the defraging length in one run according to threshold. | |
741 | */ | |
742 | static void ocfs2_calc_extent_defrag_len(u32 *alloc_size, u32 *len_defraged, | |
743 | u32 threshold, int *skip) | |
744 | { | |
745 | if ((*alloc_size + *len_defraged) < threshold) { | |
746 | /* | |
747 | * proceed defragmentation until we meet the thresh | |
748 | */ | |
749 | *len_defraged += *alloc_size; | |
750 | } else if (*len_defraged == 0) { | |
751 | /* | |
752 | * XXX: skip a large extent. | |
753 | */ | |
754 | *skip = 1; | |
755 | } else { | |
756 | /* | |
757 | * split this extent to coalesce with former pieces as | |
758 | * to reach the threshold. | |
759 | * | |
760 | * we're done here with one cycle of defragmentation | |
761 | * in a size of 'thresh', resetting 'len_defraged' | |
762 | * forces a new defragmentation. | |
763 | */ | |
764 | *alloc_size = threshold - *len_defraged; | |
765 | *len_defraged = 0; | |
766 | } | |
767 | } | |
53069d4e TY |
768 | |
769 | static int __ocfs2_move_extents_range(struct buffer_head *di_bh, | |
770 | struct ocfs2_move_extents_context *context) | |
771 | { | |
772 | int ret = 0, flags, do_defrag, skip = 0; | |
773 | u32 cpos, phys_cpos, move_start, len_to_move, alloc_size; | |
774 | u32 len_defraged = 0, defrag_thresh = 0, new_phys_cpos = 0; | |
775 | ||
776 | struct inode *inode = context->inode; | |
777 | struct ocfs2_dinode *di = (struct ocfs2_dinode *)di_bh->b_data; | |
778 | struct ocfs2_move_extents *range = context->range; | |
779 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
780 | ||
f17c20dd | 781 | if ((i_size_read(inode) == 0) || (range->me_len == 0)) |
53069d4e TY |
782 | return 0; |
783 | ||
784 | if (OCFS2_I(inode)->ip_dyn_features & OCFS2_INLINE_DATA_FL) | |
785 | return 0; | |
786 | ||
787 | context->refcount_loc = le64_to_cpu(di->i_refcount_loc); | |
788 | ||
789 | ocfs2_init_dinode_extent_tree(&context->et, INODE_CACHE(inode), di_bh); | |
790 | ocfs2_init_dealloc_ctxt(&context->dealloc); | |
791 | ||
792 | /* | |
793 | * TO-DO XXX: | |
794 | * | |
795 | * - xattr extents. | |
796 | */ | |
797 | ||
798 | do_defrag = context->auto_defrag; | |
799 | ||
800 | /* | |
801 | * extents moving happens in unit of clusters, for the sake | |
802 | * of simplicity, we may ignore two clusters where 'byte_start' | |
803 | * and 'byte_start + len' were within. | |
804 | */ | |
805 | move_start = ocfs2_clusters_for_bytes(osb->sb, range->me_start); | |
806 | len_to_move = (range->me_start + range->me_len) >> | |
807 | osb->s_clustersize_bits; | |
808 | if (len_to_move >= move_start) | |
809 | len_to_move -= move_start; | |
810 | else | |
811 | len_to_move = 0; | |
812 | ||
dda54e76 | 813 | if (do_defrag) { |
53069d4e | 814 | defrag_thresh = range->me_threshold >> osb->s_clustersize_bits; |
dda54e76 TY |
815 | if (defrag_thresh <= 1) |
816 | goto done; | |
817 | } else | |
53069d4e TY |
818 | new_phys_cpos = ocfs2_blocks_to_clusters(inode->i_sb, |
819 | range->me_goal); | |
820 | ||
821 | mlog(0, "Inode: %llu, start: %llu, len: %llu, cstart: %u, clen: %u, " | |
822 | "thresh: %u\n", | |
823 | (unsigned long long)OCFS2_I(inode)->ip_blkno, | |
824 | (unsigned long long)range->me_start, | |
825 | (unsigned long long)range->me_len, | |
826 | move_start, len_to_move, defrag_thresh); | |
827 | ||
828 | cpos = move_start; | |
829 | while (len_to_move) { | |
830 | ret = ocfs2_get_clusters(inode, cpos, &phys_cpos, &alloc_size, | |
831 | &flags); | |
832 | if (ret) { | |
833 | mlog_errno(ret); | |
834 | goto out; | |
835 | } | |
836 | ||
837 | if (alloc_size > len_to_move) | |
838 | alloc_size = len_to_move; | |
839 | ||
840 | /* | |
841 | * XXX: how to deal with a hole: | |
842 | * | |
843 | * - skip the hole of course | |
844 | * - force a new defragmentation | |
845 | */ | |
846 | if (!phys_cpos) { | |
847 | if (do_defrag) | |
848 | len_defraged = 0; | |
849 | ||
850 | goto next; | |
851 | } | |
852 | ||
853 | if (do_defrag) { | |
854 | ocfs2_calc_extent_defrag_len(&alloc_size, &len_defraged, | |
855 | defrag_thresh, &skip); | |
856 | /* | |
857 | * skip large extents | |
858 | */ | |
859 | if (skip) { | |
860 | skip = 0; | |
861 | goto next; | |
862 | } | |
863 | ||
864 | mlog(0, "#Defrag: cpos: %u, phys_cpos: %u, " | |
865 | "alloc_size: %u, len_defraged: %u\n", | |
866 | cpos, phys_cpos, alloc_size, len_defraged); | |
867 | ||
868 | ret = ocfs2_defrag_extent(context, cpos, phys_cpos, | |
4dfa66bd | 869 | &alloc_size, flags); |
53069d4e TY |
870 | } else { |
871 | ret = ocfs2_move_extent(context, cpos, phys_cpos, | |
872 | &new_phys_cpos, alloc_size, | |
873 | flags); | |
874 | ||
875 | new_phys_cpos += alloc_size; | |
876 | } | |
877 | ||
878 | if (ret < 0) { | |
879 | mlog_errno(ret); | |
880 | goto out; | |
881 | } | |
882 | ||
883 | context->clusters_moved += alloc_size; | |
884 | next: | |
885 | cpos += alloc_size; | |
886 | len_to_move -= alloc_size; | |
887 | } | |
888 | ||
dda54e76 | 889 | done: |
53069d4e TY |
890 | range->me_flags |= OCFS2_MOVE_EXT_FL_COMPLETE; |
891 | ||
892 | out: | |
893 | range->me_moved_len = ocfs2_clusters_to_bytes(osb->sb, | |
894 | context->clusters_moved); | |
895 | range->me_new_offset = ocfs2_clusters_to_bytes(osb->sb, | |
896 | context->new_phys_cpos); | |
897 | ||
898 | ocfs2_schedule_truncate_log_flush(osb, 1); | |
899 | ocfs2_run_deallocs(osb, &context->dealloc); | |
900 | ||
901 | return ret; | |
902 | } | |
903 | ||
904 | static int ocfs2_move_extents(struct ocfs2_move_extents_context *context) | |
905 | { | |
906 | int status; | |
907 | handle_t *handle; | |
908 | struct inode *inode = context->inode; | |
909 | struct ocfs2_dinode *di; | |
910 | struct buffer_head *di_bh = NULL; | |
911 | struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); | |
912 | ||
53069d4e TY |
913 | if (ocfs2_is_hard_readonly(osb) || ocfs2_is_soft_readonly(osb)) |
914 | return -EROFS; | |
915 | ||
5955102c | 916 | inode_lock(inode); |
53069d4e TY |
917 | |
918 | /* | |
919 | * This prevents concurrent writes from other nodes | |
920 | */ | |
921 | status = ocfs2_rw_lock(inode, 1); | |
922 | if (status) { | |
923 | mlog_errno(status); | |
924 | goto out; | |
925 | } | |
926 | ||
927 | status = ocfs2_inode_lock(inode, &di_bh, 1); | |
928 | if (status) { | |
929 | mlog_errno(status); | |
930 | goto out_rw_unlock; | |
931 | } | |
932 | ||
933 | /* | |
934 | * rememer ip_xattr_sem also needs to be held if necessary | |
935 | */ | |
936 | down_write(&OCFS2_I(inode)->ip_alloc_sem); | |
937 | ||
938 | status = __ocfs2_move_extents_range(di_bh, context); | |
939 | ||
940 | up_write(&OCFS2_I(inode)->ip_alloc_sem); | |
941 | if (status) { | |
942 | mlog_errno(status); | |
943 | goto out_inode_unlock; | |
944 | } | |
945 | ||
946 | /* | |
947 | * We update ctime for these changes | |
948 | */ | |
949 | handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS); | |
950 | if (IS_ERR(handle)) { | |
951 | status = PTR_ERR(handle); | |
952 | mlog_errno(status); | |
953 | goto out_inode_unlock; | |
954 | } | |
955 | ||
956 | status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), di_bh, | |
957 | OCFS2_JOURNAL_ACCESS_WRITE); | |
958 | if (status) { | |
959 | mlog_errno(status); | |
960 | goto out_commit; | |
961 | } | |
962 | ||
963 | di = (struct ocfs2_dinode *)di_bh->b_data; | |
078cd827 | 964 | inode->i_ctime = current_time(inode); |
53069d4e TY |
965 | di->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); |
966 | di->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); | |
6fdb702d | 967 | ocfs2_update_inode_fsync_trans(handle, inode, 0); |
53069d4e TY |
968 | |
969 | ocfs2_journal_dirty(handle, di_bh); | |
970 | ||
971 | out_commit: | |
972 | ocfs2_commit_trans(osb, handle); | |
973 | ||
974 | out_inode_unlock: | |
975 | brelse(di_bh); | |
976 | ocfs2_inode_unlock(inode, 1); | |
977 | out_rw_unlock: | |
978 | ocfs2_rw_unlock(inode, 1); | |
979 | out: | |
5955102c | 980 | inode_unlock(inode); |
53069d4e TY |
981 | |
982 | return status; | |
983 | } | |
984 | ||
985 | int ocfs2_ioctl_move_extents(struct file *filp, void __user *argp) | |
986 | { | |
987 | int status; | |
988 | ||
496ad9aa | 989 | struct inode *inode = file_inode(filp); |
53069d4e | 990 | struct ocfs2_move_extents range; |
85a258b7 DC |
991 | struct ocfs2_move_extents_context *context; |
992 | ||
993 | if (!argp) | |
994 | return -EINVAL; | |
53069d4e | 995 | |
a561be71 | 996 | status = mnt_want_write_file(filp); |
53069d4e TY |
997 | if (status) |
998 | return status; | |
999 | ||
bfbca926 YL |
1000 | if ((!S_ISREG(inode->i_mode)) || !(filp->f_mode & FMODE_WRITE)) { |
1001 | status = -EPERM; | |
85a258b7 | 1002 | goto out_drop; |
bfbca926 | 1003 | } |
53069d4e TY |
1004 | |
1005 | if (inode->i_flags & (S_IMMUTABLE|S_APPEND)) { | |
1006 | status = -EPERM; | |
85a258b7 | 1007 | goto out_drop; |
53069d4e TY |
1008 | } |
1009 | ||
1010 | context = kzalloc(sizeof(struct ocfs2_move_extents_context), GFP_NOFS); | |
1011 | if (!context) { | |
1012 | status = -ENOMEM; | |
1013 | mlog_errno(status); | |
85a258b7 | 1014 | goto out_drop; |
53069d4e TY |
1015 | } |
1016 | ||
1017 | context->inode = inode; | |
1018 | context->file = filp; | |
1019 | ||
85a258b7 DC |
1020 | if (copy_from_user(&range, argp, sizeof(range))) { |
1021 | status = -EFAULT; | |
1022 | goto out_free; | |
53069d4e TY |
1023 | } |
1024 | ||
bfbca926 YL |
1025 | if (range.me_start > i_size_read(inode)) { |
1026 | status = -EINVAL; | |
85a258b7 | 1027 | goto out_free; |
bfbca926 | 1028 | } |
53069d4e TY |
1029 | |
1030 | if (range.me_start + range.me_len > i_size_read(inode)) | |
1031 | range.me_len = i_size_read(inode) - range.me_start; | |
1032 | ||
1033 | context->range = ⦥ | |
1034 | ||
1035 | if (range.me_flags & OCFS2_MOVE_EXT_FL_AUTO_DEFRAG) { | |
1036 | context->auto_defrag = 1; | |
dda54e76 TY |
1037 | /* |
1038 | * ok, the default theshold for the defragmentation | |
1039 | * is 1M, since our maximum clustersize was 1M also. | |
1040 | * any thought? | |
1041 | */ | |
53069d4e | 1042 | if (!range.me_threshold) |
53069d4e | 1043 | range.me_threshold = 1024 * 1024; |
dda54e76 TY |
1044 | |
1045 | if (range.me_threshold > i_size_read(inode)) | |
1046 | range.me_threshold = i_size_read(inode); | |
1047 | ||
4dfa66bd TY |
1048 | if (range.me_flags & OCFS2_MOVE_EXT_FL_PART_DEFRAG) |
1049 | context->partial = 1; | |
53069d4e TY |
1050 | } else { |
1051 | /* | |
1052 | * first best-effort attempt to validate and adjust the goal | |
1053 | * (physical address in block), while it can't guarantee later | |
1054 | * operation can succeed all the time since global_bitmap may | |
1055 | * change a bit over time. | |
1056 | */ | |
1057 | ||
1058 | status = ocfs2_validate_and_adjust_move_goal(inode, &range); | |
1059 | if (status) | |
85a258b7 | 1060 | goto out_copy; |
53069d4e TY |
1061 | } |
1062 | ||
1063 | status = ocfs2_move_extents(context); | |
1064 | if (status) | |
1065 | mlog_errno(status); | |
85a258b7 | 1066 | out_copy: |
53069d4e TY |
1067 | /* |
1068 | * movement/defragmentation may end up being partially completed, | |
1069 | * that's the reason why we need to return userspace the finished | |
1070 | * length and new_offset even if failure happens somewhere. | |
1071 | */ | |
85a258b7 DC |
1072 | if (copy_to_user(argp, &range, sizeof(range))) |
1073 | status = -EFAULT; | |
53069d4e | 1074 | |
85a258b7 | 1075 | out_free: |
53069d4e | 1076 | kfree(context); |
85a258b7 | 1077 | out_drop: |
2a79f17e | 1078 | mnt_drop_write_file(filp); |
53069d4e TY |
1079 | |
1080 | return status; | |
1081 | } |