Commit | Line | Data |
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328970de | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
fa60ce2c | 2 | /* |
ccd979bd MF |
3 | * localalloc.c |
4 | * | |
5 | * Node local data allocation | |
6 | * | |
7 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
8 | */ |
9 | ||
10 | #include <linux/fs.h> | |
11 | #include <linux/types.h> | |
12 | #include <linux/slab.h> | |
13 | #include <linux/highmem.h> | |
14 | #include <linux/bitops.h> | |
15 | ||
ccd979bd MF |
16 | #include <cluster/masklog.h> |
17 | ||
18 | #include "ocfs2.h" | |
19 | ||
20 | #include "alloc.h" | |
13723d00 | 21 | #include "blockcheck.h" |
ccd979bd MF |
22 | #include "dlmglue.h" |
23 | #include "inode.h" | |
24 | #include "journal.h" | |
25 | #include "localalloc.h" | |
26 | #include "suballoc.h" | |
27 | #include "super.h" | |
28 | #include "sysfile.h" | |
a04733d8 | 29 | #include "ocfs2_trace.h" |
ccd979bd MF |
30 | |
31 | #include "buffer_head_io.h" | |
32 | ||
33 | #define OCFS2_LOCAL_ALLOC(dinode) (&((dinode)->id2.i_lab)) | |
34 | ||
ccd979bd MF |
35 | static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc); |
36 | ||
37 | static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, | |
38 | struct ocfs2_dinode *alloc, | |
d02f00cc MF |
39 | u32 *numbits, |
40 | struct ocfs2_alloc_reservation *resv); | |
ccd979bd MF |
41 | |
42 | static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc); | |
43 | ||
44 | static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, | |
1fabe148 | 45 | handle_t *handle, |
ccd979bd MF |
46 | struct ocfs2_dinode *alloc, |
47 | struct inode *main_bm_inode, | |
48 | struct buffer_head *main_bm_bh); | |
49 | ||
50 | static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb, | |
ccd979bd MF |
51 | struct ocfs2_alloc_context **ac, |
52 | struct inode **bitmap_inode, | |
53 | struct buffer_head **bitmap_bh); | |
54 | ||
55 | static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, | |
1fabe148 | 56 | handle_t *handle, |
ccd979bd MF |
57 | struct ocfs2_alloc_context *ac); |
58 | ||
59 | static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, | |
60 | struct inode *local_alloc_inode); | |
61 | ||
6b82021b MF |
62 | /* |
63 | * ocfs2_la_default_mb() - determine a default size, in megabytes of | |
64 | * the local alloc. | |
65 | * | |
66 | * Generally, we'd like to pick as large a local alloc as | |
67 | * possible. Performance on large workloads tends to scale | |
68 | * proportionally to la size. In addition to that, the reservations | |
69 | * code functions more efficiently as it can reserve more windows for | |
70 | * write. | |
71 | * | |
72 | * Some things work against us when trying to choose a large local alloc: | |
73 | * | |
74 | * - We need to ensure our sizing is picked to leave enough space in | |
75 | * group descriptors for other allocations (such as block groups, | |
76 | * etc). Picking default sizes which are a multiple of 4 could help | |
77 | * - block groups are allocated in 2mb and 4mb chunks. | |
78 | * | |
79 | * - Likewise, we don't want to starve other nodes of bits on small | |
80 | * file systems. This can easily be taken care of by limiting our | |
81 | * default to a reasonable size (256M) on larger cluster sizes. | |
82 | * | |
83 | * - Some file systems can't support very large sizes - 4k and 8k in | |
84 | * particular are limited to less than 128 and 256 megabytes respectively. | |
85 | * | |
86 | * The following reference table shows group descriptor and local | |
87 | * alloc maximums at various cluster sizes (4k blocksize) | |
88 | * | |
89 | * csize: 4K group: 126M la: 121M | |
90 | * csize: 8K group: 252M la: 243M | |
91 | * csize: 16K group: 504M la: 486M | |
92 | * csize: 32K group: 1008M la: 972M | |
93 | * csize: 64K group: 2016M la: 1944M | |
94 | * csize: 128K group: 4032M la: 3888M | |
95 | * csize: 256K group: 8064M la: 7776M | |
96 | * csize: 512K group: 16128M la: 15552M | |
97 | * csize: 1024K group: 32256M la: 31104M | |
98 | */ | |
99 | #define OCFS2_LA_MAX_DEFAULT_MB 256 | |
100 | #define OCFS2_LA_OLD_DEFAULT 8 | |
101 | unsigned int ocfs2_la_default_mb(struct ocfs2_super *osb) | |
102 | { | |
103 | unsigned int la_mb; | |
104 | unsigned int gd_mb; | |
1739da40 | 105 | unsigned int la_max_mb; |
6b82021b MF |
106 | unsigned int megs_per_slot; |
107 | struct super_block *sb = osb->sb; | |
108 | ||
109 | gd_mb = ocfs2_clusters_to_megabytes(osb->sb, | |
8571882c | 110 | 8 * ocfs2_group_bitmap_size(sb, 0, osb->s_feature_incompat)); |
6b82021b MF |
111 | |
112 | /* | |
113 | * This takes care of files systems with very small group | |
114 | * descriptors - 512 byte blocksize at cluster sizes lower | |
115 | * than 16K and also 1k blocksize with 4k cluster size. | |
116 | */ | |
117 | if ((sb->s_blocksize == 512 && osb->s_clustersize <= 8192) | |
118 | || (sb->s_blocksize == 1024 && osb->s_clustersize == 4096)) | |
119 | return OCFS2_LA_OLD_DEFAULT; | |
120 | ||
121 | /* | |
122 | * Leave enough room for some block groups and make the final | |
123 | * value we work from a multiple of 4. | |
124 | */ | |
125 | gd_mb -= 16; | |
126 | gd_mb &= 0xFFFFFFFB; | |
127 | ||
128 | la_mb = gd_mb; | |
129 | ||
130 | /* | |
131 | * Keep window sizes down to a reasonable default | |
132 | */ | |
133 | if (la_mb > OCFS2_LA_MAX_DEFAULT_MB) { | |
134 | /* | |
135 | * Some clustersize / blocksize combinations will have | |
136 | * given us a larger than OCFS2_LA_MAX_DEFAULT_MB | |
137 | * default size, but get poor distribution when | |
138 | * limited to exactly 256 megabytes. | |
139 | * | |
140 | * As an example, 16K clustersize at 4K blocksize | |
141 | * gives us a cluster group size of 504M. Paring the | |
142 | * local alloc size down to 256 however, would give us | |
143 | * only one window and around 200MB left in the | |
144 | * cluster group. Instead, find the first size below | |
145 | * 256 which would give us an even distribution. | |
146 | * | |
147 | * Larger cluster group sizes actually work out pretty | |
148 | * well when pared to 256, so we don't have to do this | |
149 | * for any group that fits more than two | |
150 | * OCFS2_LA_MAX_DEFAULT_MB windows. | |
151 | */ | |
152 | if (gd_mb > (2 * OCFS2_LA_MAX_DEFAULT_MB)) | |
153 | la_mb = 256; | |
154 | else { | |
155 | unsigned int gd_mult = gd_mb; | |
156 | ||
157 | while (gd_mult > 256) | |
158 | gd_mult = gd_mult >> 1; | |
159 | ||
160 | la_mb = gd_mult; | |
161 | } | |
162 | } | |
163 | ||
164 | megs_per_slot = osb->osb_clusters_at_boot / osb->max_slots; | |
165 | megs_per_slot = ocfs2_clusters_to_megabytes(osb->sb, megs_per_slot); | |
166 | /* Too many nodes, too few disk clusters. */ | |
167 | if (megs_per_slot < la_mb) | |
168 | la_mb = megs_per_slot; | |
169 | ||
1739da40 TM |
170 | /* We can't store more bits than we can in a block. */ |
171 | la_max_mb = ocfs2_clusters_to_megabytes(osb->sb, | |
172 | ocfs2_local_alloc_size(sb) * 8); | |
173 | if (la_mb > la_max_mb) | |
174 | la_mb = la_max_mb; | |
175 | ||
6b82021b MF |
176 | return la_mb; |
177 | } | |
178 | ||
73c8a800 MF |
179 | void ocfs2_la_set_sizes(struct ocfs2_super *osb, int requested_mb) |
180 | { | |
181 | struct super_block *sb = osb->sb; | |
6b82021b | 182 | unsigned int la_default_mb = ocfs2_la_default_mb(osb); |
73c8a800 MF |
183 | unsigned int la_max_mb; |
184 | ||
185 | la_max_mb = ocfs2_clusters_to_megabytes(sb, | |
186 | ocfs2_local_alloc_size(sb) * 8); | |
187 | ||
a04733d8 | 188 | trace_ocfs2_la_set_sizes(requested_mb, la_max_mb, la_default_mb); |
73c8a800 MF |
189 | |
190 | if (requested_mb == -1) { | |
191 | /* No user request - use defaults */ | |
192 | osb->local_alloc_default_bits = | |
193 | ocfs2_megabytes_to_clusters(sb, la_default_mb); | |
194 | } else if (requested_mb > la_max_mb) { | |
195 | /* Request is too big, we give the maximum available */ | |
196 | osb->local_alloc_default_bits = | |
197 | ocfs2_megabytes_to_clusters(sb, la_max_mb); | |
198 | } else { | |
199 | osb->local_alloc_default_bits = | |
200 | ocfs2_megabytes_to_clusters(sb, requested_mb); | |
201 | } | |
202 | ||
203 | osb->local_alloc_bits = osb->local_alloc_default_bits; | |
204 | } | |
205 | ||
9c7af40b MF |
206 | static inline int ocfs2_la_state_enabled(struct ocfs2_super *osb) |
207 | { | |
208 | return (osb->local_alloc_state == OCFS2_LA_THROTTLED || | |
209 | osb->local_alloc_state == OCFS2_LA_ENABLED); | |
210 | } | |
211 | ||
212 | void ocfs2_local_alloc_seen_free_bits(struct ocfs2_super *osb, | |
213 | unsigned int num_clusters) | |
214 | { | |
215 | spin_lock(&osb->osb_lock); | |
216 | if (osb->local_alloc_state == OCFS2_LA_DISABLED || | |
217 | osb->local_alloc_state == OCFS2_LA_THROTTLED) | |
218 | if (num_clusters >= osb->local_alloc_default_bits) { | |
219 | cancel_delayed_work(&osb->la_enable_wq); | |
220 | osb->local_alloc_state = OCFS2_LA_ENABLED; | |
221 | } | |
222 | spin_unlock(&osb->osb_lock); | |
223 | } | |
224 | ||
225 | void ocfs2_la_enable_worker(struct work_struct *work) | |
226 | { | |
227 | struct ocfs2_super *osb = | |
228 | container_of(work, struct ocfs2_super, | |
229 | la_enable_wq.work); | |
230 | spin_lock(&osb->osb_lock); | |
231 | osb->local_alloc_state = OCFS2_LA_ENABLED; | |
232 | spin_unlock(&osb->osb_lock); | |
233 | } | |
234 | ||
ccd979bd MF |
235 | /* |
236 | * Tell us whether a given allocation should use the local alloc | |
237 | * file. Otherwise, it has to go to the main bitmap. | |
9c7af40b MF |
238 | * |
239 | * This function does semi-dirty reads of local alloc size and state! | |
240 | * This is ok however, as the values are re-checked once under mutex. | |
ccd979bd MF |
241 | */ |
242 | int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits) | |
243 | { | |
2fbe8d1e | 244 | int ret = 0; |
9c7af40b MF |
245 | int la_bits; |
246 | ||
247 | spin_lock(&osb->osb_lock); | |
248 | la_bits = osb->local_alloc_bits; | |
ccd979bd | 249 | |
9c7af40b | 250 | if (!ocfs2_la_state_enabled(osb)) |
2fbe8d1e | 251 | goto bail; |
ccd979bd MF |
252 | |
253 | /* la_bits should be at least twice the size (in clusters) of | |
254 | * a new block group. We want to be sure block group | |
255 | * allocations go through the local alloc, so allow an | |
256 | * allocation to take up to half the bitmap. */ | |
257 | if (bits > (la_bits / 2)) | |
2fbe8d1e | 258 | goto bail; |
ccd979bd | 259 | |
2fbe8d1e SM |
260 | ret = 1; |
261 | bail: | |
a04733d8 TM |
262 | trace_ocfs2_alloc_should_use_local( |
263 | (unsigned long long)bits, osb->local_alloc_state, la_bits, ret); | |
9c7af40b | 264 | spin_unlock(&osb->osb_lock); |
2fbe8d1e | 265 | return ret; |
ccd979bd MF |
266 | } |
267 | ||
268 | int ocfs2_load_local_alloc(struct ocfs2_super *osb) | |
269 | { | |
270 | int status = 0; | |
271 | struct ocfs2_dinode *alloc = NULL; | |
272 | struct buffer_head *alloc_bh = NULL; | |
273 | u32 num_used; | |
274 | struct inode *inode = NULL; | |
275 | struct ocfs2_local_alloc *la; | |
276 | ||
ebcee4b5 | 277 | if (osb->local_alloc_bits == 0) |
2fbe8d1e SM |
278 | goto bail; |
279 | ||
ebcee4b5 | 280 | if (osb->local_alloc_bits >= osb->bitmap_cpg) { |
2fbe8d1e SM |
281 | mlog(ML_NOTICE, "Requested local alloc window %d is larger " |
282 | "than max possible %u. Using defaults.\n", | |
ebcee4b5 MF |
283 | osb->local_alloc_bits, (osb->bitmap_cpg - 1)); |
284 | osb->local_alloc_bits = | |
285 | ocfs2_megabytes_to_clusters(osb->sb, | |
6b82021b | 286 | ocfs2_la_default_mb(osb)); |
2fbe8d1e SM |
287 | } |
288 | ||
ccd979bd MF |
289 | /* read the alloc off disk */ |
290 | inode = ocfs2_get_system_file_inode(osb, LOCAL_ALLOC_SYSTEM_INODE, | |
291 | osb->slot_num); | |
292 | if (!inode) { | |
293 | status = -EINVAL; | |
294 | mlog_errno(status); | |
295 | goto bail; | |
296 | } | |
297 | ||
b657c95c JB |
298 | status = ocfs2_read_inode_block_full(inode, &alloc_bh, |
299 | OCFS2_BH_IGNORE_CACHE); | |
ccd979bd MF |
300 | if (status < 0) { |
301 | mlog_errno(status); | |
302 | goto bail; | |
303 | } | |
304 | ||
305 | alloc = (struct ocfs2_dinode *) alloc_bh->b_data; | |
306 | la = OCFS2_LOCAL_ALLOC(alloc); | |
307 | ||
308 | if (!(le32_to_cpu(alloc->i_flags) & | |
309 | (OCFS2_LOCAL_ALLOC_FL|OCFS2_BITMAP_FL))) { | |
b0697053 MF |
310 | mlog(ML_ERROR, "Invalid local alloc inode, %llu\n", |
311 | (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
ccd979bd MF |
312 | status = -EINVAL; |
313 | goto bail; | |
314 | } | |
315 | ||
316 | if ((la->la_size == 0) || | |
317 | (le16_to_cpu(la->la_size) > ocfs2_local_alloc_size(inode->i_sb))) { | |
318 | mlog(ML_ERROR, "Local alloc size is invalid (la_size = %u)\n", | |
319 | le16_to_cpu(la->la_size)); | |
320 | status = -EINVAL; | |
321 | goto bail; | |
322 | } | |
323 | ||
324 | /* do a little verification. */ | |
325 | num_used = ocfs2_local_alloc_count_bits(alloc); | |
326 | ||
327 | /* hopefully the local alloc has always been recovered before | |
328 | * we load it. */ | |
329 | if (num_used | |
330 | || alloc->id1.bitmap1.i_used | |
331 | || alloc->id1.bitmap1.i_total | |
532e1e54 JB |
332 | || la->la_bm_off) { |
333 | mlog(ML_ERROR, "inconsistent detected, clean journal with" | |
334 | " unrecovered local alloc, please run fsck.ocfs2!\n" | |
ccd979bd MF |
335 | "found = %u, set = %u, taken = %u, off = %u\n", |
336 | num_used, le32_to_cpu(alloc->id1.bitmap1.i_used), | |
337 | le32_to_cpu(alloc->id1.bitmap1.i_total), | |
338 | OCFS2_LOCAL_ALLOC(alloc)->la_bm_off); | |
339 | ||
532e1e54 JB |
340 | status = -EINVAL; |
341 | goto bail; | |
342 | } | |
343 | ||
ccd979bd MF |
344 | osb->local_alloc_bh = alloc_bh; |
345 | osb->local_alloc_state = OCFS2_LA_ENABLED; | |
346 | ||
347 | bail: | |
348 | if (status < 0) | |
a81cb88b | 349 | brelse(alloc_bh); |
72865d92 | 350 | iput(inode); |
ccd979bd | 351 | |
a04733d8 | 352 | trace_ocfs2_load_local_alloc(osb->local_alloc_bits); |
2fbe8d1e | 353 | |
c1e8d35e TM |
354 | if (status) |
355 | mlog_errno(status); | |
ccd979bd MF |
356 | return status; |
357 | } | |
358 | ||
359 | /* | |
360 | * return any unused bits to the bitmap and write out a clean | |
361 | * local_alloc. | |
362 | * | |
363 | * local_alloc_bh is optional. If not passed, we will simply use the | |
364 | * one off osb. If you do pass it however, be warned that it *will* be | |
365 | * returned brelse'd and NULL'd out.*/ | |
366 | void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb) | |
367 | { | |
368 | int status; | |
1fabe148 | 369 | handle_t *handle; |
ccd979bd MF |
370 | struct inode *local_alloc_inode = NULL; |
371 | struct buffer_head *bh = NULL; | |
372 | struct buffer_head *main_bm_bh = NULL; | |
373 | struct inode *main_bm_inode = NULL; | |
374 | struct ocfs2_dinode *alloc_copy = NULL; | |
375 | struct ocfs2_dinode *alloc = NULL; | |
376 | ||
9c7af40b | 377 | cancel_delayed_work(&osb->la_enable_wq); |
b918c430 YL |
378 | if (osb->ocfs2_wq) |
379 | flush_workqueue(osb->ocfs2_wq); | |
9c7af40b | 380 | |
ccd979bd | 381 | if (osb->local_alloc_state == OCFS2_LA_UNUSED) |
8898a5a5 | 382 | goto out; |
ccd979bd MF |
383 | |
384 | local_alloc_inode = | |
385 | ocfs2_get_system_file_inode(osb, | |
386 | LOCAL_ALLOC_SYSTEM_INODE, | |
387 | osb->slot_num); | |
388 | if (!local_alloc_inode) { | |
389 | status = -ENOENT; | |
390 | mlog_errno(status); | |
8898a5a5 | 391 | goto out; |
ccd979bd MF |
392 | } |
393 | ||
394 | osb->local_alloc_state = OCFS2_LA_DISABLED; | |
395 | ||
d02f00cc MF |
396 | ocfs2_resmap_uninit(&osb->osb_la_resmap); |
397 | ||
ccd979bd MF |
398 | main_bm_inode = ocfs2_get_system_file_inode(osb, |
399 | GLOBAL_BITMAP_SYSTEM_INODE, | |
400 | OCFS2_INVALID_SLOT); | |
401 | if (!main_bm_inode) { | |
402 | status = -EINVAL; | |
403 | mlog_errno(status); | |
8898a5a5 | 404 | goto out; |
ccd979bd MF |
405 | } |
406 | ||
5955102c | 407 | inode_lock(main_bm_inode); |
8898a5a5 | 408 | |
e63aecb6 | 409 | status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1); |
ccd979bd MF |
410 | if (status < 0) { |
411 | mlog_errno(status); | |
8898a5a5 | 412 | goto out_mutex; |
ccd979bd MF |
413 | } |
414 | ||
415 | /* WINDOW_MOVE_CREDITS is a bit heavy... */ | |
65eff9cc | 416 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
ccd979bd MF |
417 | if (IS_ERR(handle)) { |
418 | mlog_errno(PTR_ERR(handle)); | |
419 | handle = NULL; | |
8898a5a5 | 420 | goto out_unlock; |
ccd979bd MF |
421 | } |
422 | ||
423 | bh = osb->local_alloc_bh; | |
424 | alloc = (struct ocfs2_dinode *) bh->b_data; | |
425 | ||
d8b2fa65 | 426 | alloc_copy = kmemdup(alloc, bh->b_size, GFP_NOFS); |
ccd979bd MF |
427 | if (!alloc_copy) { |
428 | status = -ENOMEM; | |
8898a5a5 | 429 | goto out_commit; |
ccd979bd | 430 | } |
ccd979bd | 431 | |
0cf2f763 JB |
432 | status = ocfs2_journal_access_di(handle, INODE_CACHE(local_alloc_inode), |
433 | bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
434 | if (status < 0) { |
435 | mlog_errno(status); | |
8898a5a5 | 436 | goto out_commit; |
ccd979bd MF |
437 | } |
438 | ||
439 | ocfs2_clear_local_alloc(alloc); | |
ec20cec7 | 440 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
441 | |
442 | brelse(bh); | |
443 | osb->local_alloc_bh = NULL; | |
444 | osb->local_alloc_state = OCFS2_LA_UNUSED; | |
445 | ||
446 | status = ocfs2_sync_local_to_main(osb, handle, alloc_copy, | |
447 | main_bm_inode, main_bm_bh); | |
448 | if (status < 0) | |
449 | mlog_errno(status); | |
450 | ||
8898a5a5 | 451 | out_commit: |
02dc1af4 | 452 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 453 | |
8898a5a5 | 454 | out_unlock: |
a81cb88b | 455 | brelse(main_bm_bh); |
ccd979bd | 456 | |
e63aecb6 | 457 | ocfs2_inode_unlock(main_bm_inode, 1); |
ccd979bd | 458 | |
8898a5a5 | 459 | out_mutex: |
5955102c | 460 | inode_unlock(main_bm_inode); |
8898a5a5 MF |
461 | iput(main_bm_inode); |
462 | ||
463 | out: | |
72865d92 | 464 | iput(local_alloc_inode); |
ccd979bd | 465 | |
d787ab09 | 466 | kfree(alloc_copy); |
ccd979bd MF |
467 | } |
468 | ||
469 | /* | |
470 | * We want to free the bitmap bits outside of any recovery context as | |
471 | * we'll need a cluster lock to do so, but we must clear the local | |
472 | * alloc before giving up the recovered nodes journal. To solve this, | |
473 | * we kmalloc a copy of the local alloc before it's change for the | |
474 | * caller to process with ocfs2_complete_local_alloc_recovery | |
475 | */ | |
476 | int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb, | |
477 | int slot_num, | |
478 | struct ocfs2_dinode **alloc_copy) | |
479 | { | |
480 | int status = 0; | |
481 | struct buffer_head *alloc_bh = NULL; | |
482 | struct inode *inode = NULL; | |
483 | struct ocfs2_dinode *alloc; | |
484 | ||
a04733d8 | 485 | trace_ocfs2_begin_local_alloc_recovery(slot_num); |
ccd979bd MF |
486 | |
487 | *alloc_copy = NULL; | |
488 | ||
489 | inode = ocfs2_get_system_file_inode(osb, | |
490 | LOCAL_ALLOC_SYSTEM_INODE, | |
491 | slot_num); | |
492 | if (!inode) { | |
493 | status = -EINVAL; | |
494 | mlog_errno(status); | |
495 | goto bail; | |
496 | } | |
497 | ||
5955102c | 498 | inode_lock(inode); |
ccd979bd | 499 | |
b657c95c JB |
500 | status = ocfs2_read_inode_block_full(inode, &alloc_bh, |
501 | OCFS2_BH_IGNORE_CACHE); | |
ccd979bd MF |
502 | if (status < 0) { |
503 | mlog_errno(status); | |
504 | goto bail; | |
505 | } | |
506 | ||
507 | *alloc_copy = kmalloc(alloc_bh->b_size, GFP_KERNEL); | |
508 | if (!(*alloc_copy)) { | |
509 | status = -ENOMEM; | |
510 | goto bail; | |
511 | } | |
512 | memcpy((*alloc_copy), alloc_bh->b_data, alloc_bh->b_size); | |
513 | ||
514 | alloc = (struct ocfs2_dinode *) alloc_bh->b_data; | |
515 | ocfs2_clear_local_alloc(alloc); | |
516 | ||
13723d00 | 517 | ocfs2_compute_meta_ecc(osb->sb, alloc_bh->b_data, &alloc->i_check); |
8cb471e8 | 518 | status = ocfs2_write_block(osb, alloc_bh, INODE_CACHE(inode)); |
ccd979bd MF |
519 | if (status < 0) |
520 | mlog_errno(status); | |
521 | ||
522 | bail: | |
d787ab09 | 523 | if (status < 0) { |
ccd979bd MF |
524 | kfree(*alloc_copy); |
525 | *alloc_copy = NULL; | |
526 | } | |
527 | ||
a81cb88b | 528 | brelse(alloc_bh); |
ccd979bd MF |
529 | |
530 | if (inode) { | |
5955102c | 531 | inode_unlock(inode); |
ccd979bd MF |
532 | iput(inode); |
533 | } | |
534 | ||
c1e8d35e TM |
535 | if (status) |
536 | mlog_errno(status); | |
ccd979bd MF |
537 | return status; |
538 | } | |
539 | ||
540 | /* | |
541 | * Step 2: By now, we've completed the journal recovery, we've stamped | |
542 | * a clean local alloc on disk and dropped the node out of the | |
543 | * recovery map. Dlm locks will no longer stall, so lets clear out the | |
544 | * main bitmap. | |
545 | */ | |
546 | int ocfs2_complete_local_alloc_recovery(struct ocfs2_super *osb, | |
547 | struct ocfs2_dinode *alloc) | |
548 | { | |
549 | int status; | |
1fabe148 | 550 | handle_t *handle; |
ccd979bd | 551 | struct buffer_head *main_bm_bh = NULL; |
8898a5a5 | 552 | struct inode *main_bm_inode; |
ccd979bd | 553 | |
ccd979bd MF |
554 | main_bm_inode = ocfs2_get_system_file_inode(osb, |
555 | GLOBAL_BITMAP_SYSTEM_INODE, | |
556 | OCFS2_INVALID_SLOT); | |
557 | if (!main_bm_inode) { | |
558 | status = -EINVAL; | |
559 | mlog_errno(status); | |
8898a5a5 | 560 | goto out; |
ccd979bd MF |
561 | } |
562 | ||
5955102c | 563 | inode_lock(main_bm_inode); |
8898a5a5 | 564 | |
e63aecb6 | 565 | status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1); |
ccd979bd MF |
566 | if (status < 0) { |
567 | mlog_errno(status); | |
8898a5a5 | 568 | goto out_mutex; |
ccd979bd MF |
569 | } |
570 | ||
65eff9cc | 571 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
ccd979bd MF |
572 | if (IS_ERR(handle)) { |
573 | status = PTR_ERR(handle); | |
574 | handle = NULL; | |
575 | mlog_errno(status); | |
8898a5a5 | 576 | goto out_unlock; |
ccd979bd MF |
577 | } |
578 | ||
579 | /* we want the bitmap change to be recorded on disk asap */ | |
1fabe148 | 580 | handle->h_sync = 1; |
ccd979bd MF |
581 | |
582 | status = ocfs2_sync_local_to_main(osb, handle, alloc, | |
583 | main_bm_inode, main_bm_bh); | |
584 | if (status < 0) | |
585 | mlog_errno(status); | |
586 | ||
02dc1af4 | 587 | ocfs2_commit_trans(osb, handle); |
8898a5a5 MF |
588 | |
589 | out_unlock: | |
e63aecb6 | 590 | ocfs2_inode_unlock(main_bm_inode, 1); |
8898a5a5 MF |
591 | |
592 | out_mutex: | |
5955102c | 593 | inode_unlock(main_bm_inode); |
ccd979bd | 594 | |
a81cb88b | 595 | brelse(main_bm_bh); |
ccd979bd | 596 | |
8898a5a5 | 597 | iput(main_bm_inode); |
ccd979bd | 598 | |
8898a5a5 | 599 | out: |
4d0ddb2c | 600 | if (!status) |
b89c5428 | 601 | ocfs2_init_steal_slots(osb); |
c1e8d35e TM |
602 | if (status) |
603 | mlog_errno(status); | |
ccd979bd MF |
604 | return status; |
605 | } | |
606 | ||
607 | /* | |
9c7af40b | 608 | * make sure we've got at least bits_wanted contiguous bits in the |
137cebf9 | 609 | * local alloc. You lose them when you drop i_rwsem. |
ccd979bd MF |
610 | * |
611 | * We will add ourselves to the transaction passed in, but may start | |
612 | * our own in order to shift windows. | |
613 | */ | |
614 | int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb, | |
ccd979bd MF |
615 | u32 bits_wanted, |
616 | struct ocfs2_alloc_context *ac) | |
617 | { | |
618 | int status; | |
619 | struct ocfs2_dinode *alloc; | |
620 | struct inode *local_alloc_inode; | |
621 | unsigned int free_bits; | |
622 | ||
ccd979bd | 623 | BUG_ON(!ac); |
ccd979bd MF |
624 | |
625 | local_alloc_inode = | |
626 | ocfs2_get_system_file_inode(osb, | |
627 | LOCAL_ALLOC_SYSTEM_INODE, | |
628 | osb->slot_num); | |
629 | if (!local_alloc_inode) { | |
630 | status = -ENOENT; | |
631 | mlog_errno(status); | |
632 | goto bail; | |
633 | } | |
da5cbf2f | 634 | |
5955102c | 635 | inode_lock(local_alloc_inode); |
da5cbf2f | 636 | |
9c7af40b MF |
637 | /* |
638 | * We must double check state and allocator bits because | |
137cebf9 | 639 | * another process may have changed them while holding i_rwsem. |
9c7af40b MF |
640 | */ |
641 | spin_lock(&osb->osb_lock); | |
642 | if (!ocfs2_la_state_enabled(osb) || | |
643 | (bits_wanted > osb->local_alloc_bits)) { | |
644 | spin_unlock(&osb->osb_lock); | |
ccd979bd MF |
645 | status = -ENOSPC; |
646 | goto bail; | |
647 | } | |
9c7af40b | 648 | spin_unlock(&osb->osb_lock); |
ccd979bd MF |
649 | |
650 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
651 | ||
e407e397 | 652 | #ifdef CONFIG_OCFS2_DEBUG_FS |
ccd979bd MF |
653 | if (le32_to_cpu(alloc->id1.bitmap1.i_used) != |
654 | ocfs2_local_alloc_count_bits(alloc)) { | |
93f5920d JP |
655 | status = ocfs2_error(osb->sb, "local alloc inode %llu says it has %u used bits, but a count shows %u\n", |
656 | (unsigned long long)le64_to_cpu(alloc->i_blkno), | |
657 | le32_to_cpu(alloc->id1.bitmap1.i_used), | |
658 | ocfs2_local_alloc_count_bits(alloc)); | |
ccd979bd MF |
659 | goto bail; |
660 | } | |
5a58c3ef | 661 | #endif |
ccd979bd MF |
662 | |
663 | free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) - | |
664 | le32_to_cpu(alloc->id1.bitmap1.i_used); | |
665 | if (bits_wanted > free_bits) { | |
666 | /* uhoh, window change time. */ | |
667 | status = | |
668 | ocfs2_local_alloc_slide_window(osb, local_alloc_inode); | |
669 | if (status < 0) { | |
670 | if (status != -ENOSPC) | |
671 | mlog_errno(status); | |
672 | goto bail; | |
673 | } | |
9c7af40b MF |
674 | |
675 | /* | |
676 | * Under certain conditions, the window slide code | |
677 | * might have reduced the number of bits available or | |
679edeb0 | 678 | * disabled the local alloc entirely. Re-check |
9c7af40b MF |
679 | * here and return -ENOSPC if necessary. |
680 | */ | |
681 | status = -ENOSPC; | |
682 | if (!ocfs2_la_state_enabled(osb)) | |
683 | goto bail; | |
684 | ||
685 | free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) - | |
686 | le32_to_cpu(alloc->id1.bitmap1.i_used); | |
687 | if (bits_wanted > free_bits) | |
688 | goto bail; | |
ccd979bd MF |
689 | } |
690 | ||
8fccfc82 | 691 | ac->ac_inode = local_alloc_inode; |
a4a48911 TM |
692 | /* We should never use localalloc from another slot */ |
693 | ac->ac_alloc_slot = osb->slot_num; | |
8fccfc82 | 694 | ac->ac_which = OCFS2_AC_USE_LOCAL; |
ccd979bd MF |
695 | get_bh(osb->local_alloc_bh); |
696 | ac->ac_bh = osb->local_alloc_bh; | |
ccd979bd MF |
697 | status = 0; |
698 | bail: | |
bda0233b | 699 | if (status < 0 && local_alloc_inode) { |
5955102c | 700 | inode_unlock(local_alloc_inode); |
8fccfc82 | 701 | iput(local_alloc_inode); |
bda0233b | 702 | } |
ccd979bd | 703 | |
a04733d8 TM |
704 | trace_ocfs2_reserve_local_alloc_bits( |
705 | (unsigned long long)ac->ac_max_block, | |
706 | bits_wanted, osb->slot_num, status); | |
2fbe8d1e | 707 | |
c1e8d35e TM |
708 | if (status) |
709 | mlog_errno(status); | |
ccd979bd MF |
710 | return status; |
711 | } | |
712 | ||
713 | int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb, | |
1fabe148 | 714 | handle_t *handle, |
ccd979bd | 715 | struct ocfs2_alloc_context *ac, |
415cb800 | 716 | u32 bits_wanted, |
ccd979bd MF |
717 | u32 *bit_off, |
718 | u32 *num_bits) | |
719 | { | |
720 | int status, start; | |
721 | struct inode *local_alloc_inode; | |
ccd979bd MF |
722 | void *bitmap; |
723 | struct ocfs2_dinode *alloc; | |
724 | struct ocfs2_local_alloc *la; | |
725 | ||
ccd979bd MF |
726 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL); |
727 | ||
ccd979bd MF |
728 | local_alloc_inode = ac->ac_inode; |
729 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
730 | la = OCFS2_LOCAL_ALLOC(alloc); | |
731 | ||
d02f00cc MF |
732 | start = ocfs2_local_alloc_find_clear_bits(osb, alloc, &bits_wanted, |
733 | ac->ac_resv); | |
ccd979bd MF |
734 | if (start == -1) { |
735 | /* TODO: Shouldn't we just BUG here? */ | |
736 | status = -ENOSPC; | |
737 | mlog_errno(status); | |
738 | goto bail; | |
739 | } | |
740 | ||
741 | bitmap = la->la_bitmap; | |
742 | *bit_off = le32_to_cpu(la->la_bm_off) + start; | |
ccd979bd MF |
743 | *num_bits = bits_wanted; |
744 | ||
0cf2f763 JB |
745 | status = ocfs2_journal_access_di(handle, |
746 | INODE_CACHE(local_alloc_inode), | |
13723d00 JB |
747 | osb->local_alloc_bh, |
748 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
749 | if (status < 0) { |
750 | mlog_errno(status); | |
751 | goto bail; | |
752 | } | |
753 | ||
d02f00cc MF |
754 | ocfs2_resmap_claimed_bits(&osb->osb_la_resmap, ac->ac_resv, start, |
755 | bits_wanted); | |
756 | ||
ccd979bd MF |
757 | while(bits_wanted--) |
758 | ocfs2_set_bit(start++, bitmap); | |
759 | ||
0dd3256e | 760 | le32_add_cpu(&alloc->id1.bitmap1.i_used, *num_bits); |
ec20cec7 | 761 | ocfs2_journal_dirty(handle, osb->local_alloc_bh); |
ccd979bd | 762 | |
ccd979bd | 763 | bail: |
c1e8d35e TM |
764 | if (status) |
765 | mlog_errno(status); | |
ccd979bd MF |
766 | return status; |
767 | } | |
768 | ||
fb951eb5 ZW |
769 | int ocfs2_free_local_alloc_bits(struct ocfs2_super *osb, |
770 | handle_t *handle, | |
771 | struct ocfs2_alloc_context *ac, | |
772 | u32 bit_off, | |
773 | u32 num_bits) | |
774 | { | |
775 | int status, start; | |
776 | u32 clear_bits; | |
777 | struct inode *local_alloc_inode; | |
778 | void *bitmap; | |
779 | struct ocfs2_dinode *alloc; | |
780 | struct ocfs2_local_alloc *la; | |
781 | ||
782 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL); | |
783 | ||
784 | local_alloc_inode = ac->ac_inode; | |
785 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
786 | la = OCFS2_LOCAL_ALLOC(alloc); | |
787 | ||
788 | bitmap = la->la_bitmap; | |
789 | start = bit_off - le32_to_cpu(la->la_bm_off); | |
790 | clear_bits = num_bits; | |
791 | ||
792 | status = ocfs2_journal_access_di(handle, | |
793 | INODE_CACHE(local_alloc_inode), | |
794 | osb->local_alloc_bh, | |
795 | OCFS2_JOURNAL_ACCESS_WRITE); | |
796 | if (status < 0) { | |
797 | mlog_errno(status); | |
798 | goto bail; | |
799 | } | |
800 | ||
801 | while (clear_bits--) | |
802 | ocfs2_clear_bit(start++, bitmap); | |
803 | ||
804 | le32_add_cpu(&alloc->id1.bitmap1.i_used, -num_bits); | |
805 | ocfs2_journal_dirty(handle, osb->local_alloc_bh); | |
806 | ||
807 | bail: | |
808 | return status; | |
809 | } | |
810 | ||
ccd979bd MF |
811 | static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc) |
812 | { | |
a75613ec | 813 | u32 count; |
ccd979bd MF |
814 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); |
815 | ||
a75613ec | 816 | count = memweight(la->la_bitmap, le16_to_cpu(la->la_size)); |
ccd979bd | 817 | |
a04733d8 | 818 | trace_ocfs2_local_alloc_count_bits(count); |
ccd979bd MF |
819 | return count; |
820 | } | |
821 | ||
822 | static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, | |
d02f00cc MF |
823 | struct ocfs2_dinode *alloc, |
824 | u32 *numbits, | |
825 | struct ocfs2_alloc_reservation *resv) | |
ccd979bd | 826 | { |
dec5b0d4 | 827 | int numfound = 0, bitoff, left, startoff; |
d02f00cc MF |
828 | int local_resv = 0; |
829 | struct ocfs2_alloc_reservation r; | |
ccd979bd | 830 | void *bitmap = NULL; |
d02f00cc | 831 | struct ocfs2_reservation_map *resmap = &osb->osb_la_resmap; |
ccd979bd | 832 | |
ccd979bd | 833 | if (!alloc->id1.bitmap1.i_total) { |
ccd979bd MF |
834 | bitoff = -1; |
835 | goto bail; | |
836 | } | |
837 | ||
d02f00cc MF |
838 | if (!resv) { |
839 | local_resv = 1; | |
840 | ocfs2_resv_init_once(&r); | |
841 | ocfs2_resv_set_type(&r, OCFS2_RESV_FLAG_TMP); | |
842 | resv = &r; | |
843 | } | |
844 | ||
845 | numfound = *numbits; | |
846 | if (ocfs2_resmap_resv_bits(resmap, resv, &bitoff, &numfound) == 0) { | |
847 | if (numfound < *numbits) | |
848 | *numbits = numfound; | |
849 | goto bail; | |
850 | } | |
851 | ||
852 | /* | |
853 | * Code error. While reservations are enabled, local | |
854 | * allocation should _always_ go through them. | |
855 | */ | |
856 | BUG_ON(osb->osb_resv_level != 0); | |
857 | ||
858 | /* | |
859 | * Reservations are disabled. Handle this the old way. | |
860 | */ | |
861 | ||
ccd979bd MF |
862 | bitmap = OCFS2_LOCAL_ALLOC(alloc)->la_bitmap; |
863 | ||
864 | numfound = bitoff = startoff = 0; | |
ccd979bd MF |
865 | left = le32_to_cpu(alloc->id1.bitmap1.i_total); |
866 | while ((bitoff = ocfs2_find_next_zero_bit(bitmap, left, startoff)) != -1) { | |
867 | if (bitoff == left) { | |
868 | /* mlog(0, "bitoff (%d) == left", bitoff); */ | |
869 | break; | |
870 | } | |
871 | /* mlog(0, "Found a zero: bitoff = %d, startoff = %d, " | |
872 | "numfound = %d\n", bitoff, startoff, numfound);*/ | |
873 | ||
874 | /* Ok, we found a zero bit... is it contig. or do we | |
875 | * start over?*/ | |
876 | if (bitoff == startoff) { | |
877 | /* we found a zero */ | |
878 | numfound++; | |
879 | startoff++; | |
880 | } else { | |
881 | /* got a zero after some ones */ | |
882 | numfound = 1; | |
883 | startoff = bitoff+1; | |
884 | } | |
885 | /* we got everything we needed */ | |
d02f00cc | 886 | if (numfound == *numbits) { |
ccd979bd MF |
887 | /* mlog(0, "Found it all!\n"); */ |
888 | break; | |
889 | } | |
890 | } | |
891 | ||
a04733d8 | 892 | trace_ocfs2_local_alloc_find_clear_bits_search_bitmap(bitoff, numfound); |
ccd979bd | 893 | |
3e4218df | 894 | if (numfound == *numbits) |
ccd979bd | 895 | bitoff = startoff - numfound; |
3e4218df | 896 | else |
ccd979bd MF |
897 | bitoff = -1; |
898 | ||
899 | bail: | |
d02f00cc MF |
900 | if (local_resv) |
901 | ocfs2_resv_discard(resmap, resv); | |
902 | ||
a04733d8 TM |
903 | trace_ocfs2_local_alloc_find_clear_bits(*numbits, |
904 | le32_to_cpu(alloc->id1.bitmap1.i_total), | |
905 | bitoff, numfound); | |
906 | ||
ccd979bd MF |
907 | return bitoff; |
908 | } | |
909 | ||
910 | static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc) | |
911 | { | |
912 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); | |
913 | int i; | |
ccd979bd MF |
914 | |
915 | alloc->id1.bitmap1.i_total = 0; | |
916 | alloc->id1.bitmap1.i_used = 0; | |
917 | la->la_bm_off = 0; | |
918 | for(i = 0; i < le16_to_cpu(la->la_size); i++) | |
919 | la->la_bitmap[i] = 0; | |
ccd979bd MF |
920 | } |
921 | ||
922 | #if 0 | |
923 | /* turn this on and uncomment below to aid debugging window shifts. */ | |
924 | static void ocfs2_verify_zero_bits(unsigned long *bitmap, | |
925 | unsigned int start, | |
926 | unsigned int count) | |
927 | { | |
928 | unsigned int tmp = count; | |
929 | while(tmp--) { | |
930 | if (ocfs2_test_bit(start + tmp, bitmap)) { | |
931 | printk("ocfs2_verify_zero_bits: start = %u, count = " | |
932 | "%u\n", start, count); | |
933 | printk("ocfs2_verify_zero_bits: bit %u is set!", | |
934 | start + tmp); | |
935 | BUG(); | |
936 | } | |
937 | } | |
938 | } | |
939 | #endif | |
940 | ||
941 | /* | |
942 | * sync the local alloc to main bitmap. | |
943 | * | |
944 | * assumes you've already locked the main bitmap -- the bitmap inode | |
945 | * passed is used for caching. | |
946 | */ | |
947 | static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, | |
1fabe148 | 948 | handle_t *handle, |
ccd979bd MF |
949 | struct ocfs2_dinode *alloc, |
950 | struct inode *main_bm_inode, | |
951 | struct buffer_head *main_bm_bh) | |
952 | { | |
953 | int status = 0; | |
954 | int bit_off, left, count, start; | |
955 | u64 la_start_blk; | |
956 | u64 blkno; | |
957 | void *bitmap; | |
958 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); | |
959 | ||
a04733d8 | 960 | trace_ocfs2_sync_local_to_main( |
ef6b689b TM |
961 | le32_to_cpu(alloc->id1.bitmap1.i_total), |
962 | le32_to_cpu(alloc->id1.bitmap1.i_used)); | |
ccd979bd MF |
963 | |
964 | if (!alloc->id1.bitmap1.i_total) { | |
ccd979bd MF |
965 | goto bail; |
966 | } | |
967 | ||
968 | if (le32_to_cpu(alloc->id1.bitmap1.i_used) == | |
969 | le32_to_cpu(alloc->id1.bitmap1.i_total)) { | |
ccd979bd MF |
970 | goto bail; |
971 | } | |
972 | ||
973 | la_start_blk = ocfs2_clusters_to_blocks(osb->sb, | |
974 | le32_to_cpu(la->la_bm_off)); | |
975 | bitmap = la->la_bitmap; | |
7982f975 | 976 | start = count = 0; |
ccd979bd MF |
977 | left = le32_to_cpu(alloc->id1.bitmap1.i_total); |
978 | ||
979 | while ((bit_off = ocfs2_find_next_zero_bit(bitmap, left, start)) | |
980 | != -1) { | |
981 | if ((bit_off < left) && (bit_off == start)) { | |
982 | count++; | |
983 | start++; | |
984 | continue; | |
985 | } | |
986 | if (count) { | |
987 | blkno = la_start_blk + | |
988 | ocfs2_clusters_to_blocks(osb->sb, | |
989 | start - count); | |
990 | ||
a04733d8 | 991 | trace_ocfs2_sync_local_to_main_free( |
b0697053 MF |
992 | count, start - count, |
993 | (unsigned long long)la_start_blk, | |
994 | (unsigned long long)blkno); | |
ccd979bd | 995 | |
b4414eea MF |
996 | status = ocfs2_release_clusters(handle, |
997 | main_bm_inode, | |
998 | main_bm_bh, blkno, | |
999 | count); | |
ccd979bd MF |
1000 | if (status < 0) { |
1001 | mlog_errno(status); | |
1002 | goto bail; | |
1003 | } | |
1004 | } | |
1005 | if (bit_off >= left) | |
1006 | break; | |
1007 | count = 1; | |
1008 | start = bit_off + 1; | |
1009 | } | |
1010 | ||
1011 | bail: | |
c1e8d35e TM |
1012 | if (status) |
1013 | mlog_errno(status); | |
ccd979bd MF |
1014 | return status; |
1015 | } | |
1016 | ||
9c7af40b MF |
1017 | enum ocfs2_la_event { |
1018 | OCFS2_LA_EVENT_SLIDE, /* Normal window slide. */ | |
1019 | OCFS2_LA_EVENT_FRAGMENTED, /* The global bitmap has | |
1020 | * enough bits theoretically | |
1021 | * free, but a contiguous | |
1022 | * allocation could not be | |
1023 | * found. */ | |
1024 | OCFS2_LA_EVENT_ENOSPC, /* Global bitmap doesn't have | |
1025 | * enough bits free to satisfy | |
1026 | * our request. */ | |
1027 | }; | |
1028 | #define OCFS2_LA_ENABLE_INTERVAL (30 * HZ) | |
1029 | /* | |
1030 | * Given an event, calculate the size of our next local alloc window. | |
1031 | * | |
137cebf9 | 1032 | * This should always be called under i_rwsem of the local alloc inode |
9c7af40b MF |
1033 | * so that local alloc disabling doesn't race with processes trying to |
1034 | * use the allocator. | |
1035 | * | |
1036 | * Returns the state which the local alloc was left in. This value can | |
1037 | * be ignored by some paths. | |
1038 | */ | |
1039 | static int ocfs2_recalc_la_window(struct ocfs2_super *osb, | |
1040 | enum ocfs2_la_event event) | |
1041 | { | |
1042 | unsigned int bits; | |
1043 | int state; | |
1044 | ||
1045 | spin_lock(&osb->osb_lock); | |
1046 | if (osb->local_alloc_state == OCFS2_LA_DISABLED) { | |
1047 | WARN_ON_ONCE(osb->local_alloc_state == OCFS2_LA_DISABLED); | |
1048 | goto out_unlock; | |
1049 | } | |
1050 | ||
1051 | /* | |
1052 | * ENOSPC and fragmentation are treated similarly for now. | |
1053 | */ | |
1054 | if (event == OCFS2_LA_EVENT_ENOSPC || | |
1055 | event == OCFS2_LA_EVENT_FRAGMENTED) { | |
1056 | /* | |
1057 | * We ran out of contiguous space in the primary | |
1058 | * bitmap. Drastically reduce the number of bits used | |
1059 | * by local alloc until we have to disable it. | |
1060 | */ | |
1061 | bits = osb->local_alloc_bits >> 1; | |
1062 | if (bits > ocfs2_megabytes_to_clusters(osb->sb, 1)) { | |
1063 | /* | |
1064 | * By setting state to THROTTLED, we'll keep | |
1065 | * the number of local alloc bits used down | |
1066 | * until an event occurs which would give us | |
1067 | * reason to assume the bitmap situation might | |
1068 | * have changed. | |
1069 | */ | |
1070 | osb->local_alloc_state = OCFS2_LA_THROTTLED; | |
1071 | osb->local_alloc_bits = bits; | |
1072 | } else { | |
1073 | osb->local_alloc_state = OCFS2_LA_DISABLED; | |
1074 | } | |
35ddf78e | 1075 | queue_delayed_work(osb->ocfs2_wq, &osb->la_enable_wq, |
9c7af40b MF |
1076 | OCFS2_LA_ENABLE_INTERVAL); |
1077 | goto out_unlock; | |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * Don't increase the size of the local alloc window until we | |
1082 | * know we might be able to fulfill the request. Otherwise, we | |
1083 | * risk bouncing around the global bitmap during periods of | |
1084 | * low space. | |
1085 | */ | |
1086 | if (osb->local_alloc_state != OCFS2_LA_THROTTLED) | |
1087 | osb->local_alloc_bits = osb->local_alloc_default_bits; | |
1088 | ||
1089 | out_unlock: | |
1090 | state = osb->local_alloc_state; | |
1091 | spin_unlock(&osb->osb_lock); | |
1092 | ||
1093 | return state; | |
1094 | } | |
1095 | ||
ccd979bd | 1096 | static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb, |
ccd979bd MF |
1097 | struct ocfs2_alloc_context **ac, |
1098 | struct inode **bitmap_inode, | |
1099 | struct buffer_head **bitmap_bh) | |
1100 | { | |
1101 | int status; | |
1102 | ||
cd861280 | 1103 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1104 | if (!(*ac)) { |
1105 | status = -ENOMEM; | |
1106 | mlog_errno(status); | |
1107 | goto bail; | |
1108 | } | |
1109 | ||
9c7af40b | 1110 | retry_enospc: |
7e9b7937 | 1111 | (*ac)->ac_bits_wanted = osb->local_alloc_bits; |
ccd979bd | 1112 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); |
9c7af40b MF |
1113 | if (status == -ENOSPC) { |
1114 | if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_ENOSPC) == | |
1115 | OCFS2_LA_DISABLED) | |
1116 | goto bail; | |
1117 | ||
1118 | ocfs2_free_ac_resource(*ac); | |
1119 | memset(*ac, 0, sizeof(struct ocfs2_alloc_context)); | |
1120 | goto retry_enospc; | |
1121 | } | |
ccd979bd | 1122 | if (status < 0) { |
9c7af40b | 1123 | mlog_errno(status); |
ccd979bd MF |
1124 | goto bail; |
1125 | } | |
1126 | ||
1127 | *bitmap_inode = (*ac)->ac_inode; | |
1128 | igrab(*bitmap_inode); | |
1129 | *bitmap_bh = (*ac)->ac_bh; | |
1130 | get_bh(*bitmap_bh); | |
1131 | status = 0; | |
1132 | bail: | |
1133 | if ((status < 0) && *ac) { | |
1134 | ocfs2_free_alloc_context(*ac); | |
1135 | *ac = NULL; | |
1136 | } | |
1137 | ||
c1e8d35e TM |
1138 | if (status) |
1139 | mlog_errno(status); | |
ccd979bd MF |
1140 | return status; |
1141 | } | |
1142 | ||
1143 | /* | |
1144 | * pass it the bitmap lock in lock_bh if you have it. | |
1145 | */ | |
1146 | static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, | |
1fabe148 | 1147 | handle_t *handle, |
ccd979bd MF |
1148 | struct ocfs2_alloc_context *ac) |
1149 | { | |
1150 | int status = 0; | |
1151 | u32 cluster_off, cluster_count; | |
1152 | struct ocfs2_dinode *alloc = NULL; | |
1153 | struct ocfs2_local_alloc *la; | |
1154 | ||
ccd979bd MF |
1155 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; |
1156 | la = OCFS2_LOCAL_ALLOC(alloc); | |
1157 | ||
a04733d8 TM |
1158 | trace_ocfs2_local_alloc_new_window( |
1159 | le32_to_cpu(alloc->id1.bitmap1.i_total), | |
1160 | osb->local_alloc_bits); | |
883d4cae MF |
1161 | |
1162 | /* Instruct the allocation code to try the most recently used | |
1163 | * cluster group. We'll re-record the group used this pass | |
1164 | * below. */ | |
1165 | ac->ac_last_group = osb->la_last_gd; | |
1166 | ||
ccd979bd MF |
1167 | /* we used the generic suballoc reserve function, but we set |
1168 | * everything up nicely, so there's no reason why we can't use | |
1169 | * the more specific cluster api to claim bits. */ | |
1ed9b777 | 1170 | status = ocfs2_claim_clusters(handle, ac, osb->local_alloc_bits, |
ccd979bd | 1171 | &cluster_off, &cluster_count); |
9c7af40b MF |
1172 | if (status == -ENOSPC) { |
1173 | retry_enospc: | |
1174 | /* | |
1175 | * Note: We could also try syncing the journal here to | |
1176 | * allow use of any free bits which the current | |
1177 | * transaction can't give us access to. --Mark | |
1178 | */ | |
1179 | if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_FRAGMENTED) == | |
1180 | OCFS2_LA_DISABLED) | |
1181 | goto bail; | |
1182 | ||
7e9b7937 | 1183 | ac->ac_bits_wanted = osb->local_alloc_bits; |
1ed9b777 | 1184 | status = ocfs2_claim_clusters(handle, ac, |
9c7af40b MF |
1185 | osb->local_alloc_bits, |
1186 | &cluster_off, | |
1187 | &cluster_count); | |
1188 | if (status == -ENOSPC) | |
1189 | goto retry_enospc; | |
1190 | /* | |
1191 | * We only shrunk the *minimum* number of in our | |
1192 | * request - it's entirely possible that the allocator | |
1193 | * might give us more than we asked for. | |
1194 | */ | |
1195 | if (status == 0) { | |
1196 | spin_lock(&osb->osb_lock); | |
1197 | osb->local_alloc_bits = cluster_count; | |
1198 | spin_unlock(&osb->osb_lock); | |
1199 | } | |
1200 | } | |
ccd979bd MF |
1201 | if (status < 0) { |
1202 | if (status != -ENOSPC) | |
1203 | mlog_errno(status); | |
1204 | goto bail; | |
1205 | } | |
1206 | ||
883d4cae MF |
1207 | osb->la_last_gd = ac->ac_last_group; |
1208 | ||
ccd979bd MF |
1209 | la->la_bm_off = cpu_to_le32(cluster_off); |
1210 | alloc->id1.bitmap1.i_total = cpu_to_le32(cluster_count); | |
1211 | /* just in case... In the future when we find space ourselves, | |
1212 | * we don't have to get all contiguous -- but we'll have to | |
1213 | * set all previously used bits in bitmap and update | |
1214 | * la_bits_set before setting the bits in the main bitmap. */ | |
1215 | alloc->id1.bitmap1.i_used = 0; | |
1216 | memset(OCFS2_LOCAL_ALLOC(alloc)->la_bitmap, 0, | |
1217 | le16_to_cpu(la->la_size)); | |
1218 | ||
d02f00cc MF |
1219 | ocfs2_resmap_restart(&osb->osb_la_resmap, cluster_count, |
1220 | OCFS2_LOCAL_ALLOC(alloc)->la_bitmap); | |
1221 | ||
a04733d8 TM |
1222 | trace_ocfs2_local_alloc_new_window_result( |
1223 | OCFS2_LOCAL_ALLOC(alloc)->la_bm_off, | |
1224 | le32_to_cpu(alloc->id1.bitmap1.i_total)); | |
ccd979bd MF |
1225 | |
1226 | bail: | |
c1e8d35e TM |
1227 | if (status) |
1228 | mlog_errno(status); | |
ccd979bd MF |
1229 | return status; |
1230 | } | |
1231 | ||
1232 | /* Note that we do *NOT* lock the local alloc inode here as | |
1233 | * it's been locked already for us. */ | |
1234 | static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, | |
1235 | struct inode *local_alloc_inode) | |
1236 | { | |
1237 | int status = 0; | |
1238 | struct buffer_head *main_bm_bh = NULL; | |
1239 | struct inode *main_bm_inode = NULL; | |
1fabe148 | 1240 | handle_t *handle = NULL; |
ccd979bd MF |
1241 | struct ocfs2_dinode *alloc; |
1242 | struct ocfs2_dinode *alloc_copy = NULL; | |
1243 | struct ocfs2_alloc_context *ac = NULL; | |
1244 | ||
9c7af40b MF |
1245 | ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_SLIDE); |
1246 | ||
ccd979bd MF |
1247 | /* This will lock the main bitmap for us. */ |
1248 | status = ocfs2_local_alloc_reserve_for_window(osb, | |
ccd979bd MF |
1249 | &ac, |
1250 | &main_bm_inode, | |
1251 | &main_bm_bh); | |
1252 | if (status < 0) { | |
1253 | if (status != -ENOSPC) | |
1254 | mlog_errno(status); | |
1255 | goto bail; | |
1256 | } | |
1257 | ||
65eff9cc | 1258 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
ccd979bd MF |
1259 | if (IS_ERR(handle)) { |
1260 | status = PTR_ERR(handle); | |
1261 | handle = NULL; | |
1262 | mlog_errno(status); | |
1263 | goto bail; | |
1264 | } | |
1265 | ||
1266 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
1267 | ||
1268 | /* We want to clear the local alloc before doing anything | |
1269 | * else, so that if we error later during this operation, | |
1270 | * local alloc shutdown won't try to double free main bitmap | |
1271 | * bits. Make a copy so the sync function knows which bits to | |
1272 | * free. */ | |
d8b2fa65 | 1273 | alloc_copy = kmemdup(alloc, osb->local_alloc_bh->b_size, GFP_NOFS); |
ccd979bd MF |
1274 | if (!alloc_copy) { |
1275 | status = -ENOMEM; | |
1276 | mlog_errno(status); | |
1277 | goto bail; | |
1278 | } | |
ccd979bd | 1279 | |
0cf2f763 JB |
1280 | status = ocfs2_journal_access_di(handle, |
1281 | INODE_CACHE(local_alloc_inode), | |
13723d00 JB |
1282 | osb->local_alloc_bh, |
1283 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1284 | if (status < 0) { |
1285 | mlog_errno(status); | |
1286 | goto bail; | |
1287 | } | |
1288 | ||
1289 | ocfs2_clear_local_alloc(alloc); | |
ec20cec7 | 1290 | ocfs2_journal_dirty(handle, osb->local_alloc_bh); |
ccd979bd MF |
1291 | |
1292 | status = ocfs2_sync_local_to_main(osb, handle, alloc_copy, | |
1293 | main_bm_inode, main_bm_bh); | |
1294 | if (status < 0) { | |
1295 | mlog_errno(status); | |
1296 | goto bail; | |
1297 | } | |
1298 | ||
1299 | status = ocfs2_local_alloc_new_window(osb, handle, ac); | |
1300 | if (status < 0) { | |
1301 | if (status != -ENOSPC) | |
1302 | mlog_errno(status); | |
1303 | goto bail; | |
1304 | } | |
1305 | ||
1306 | atomic_inc(&osb->alloc_stats.moves); | |
1307 | ||
ccd979bd MF |
1308 | bail: |
1309 | if (handle) | |
02dc1af4 | 1310 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1311 | |
a81cb88b | 1312 | brelse(main_bm_bh); |
ccd979bd | 1313 | |
72865d92 | 1314 | iput(main_bm_inode); |
d787ab09 | 1315 | kfree(alloc_copy); |
ccd979bd MF |
1316 | |
1317 | if (ac) | |
1318 | ocfs2_free_alloc_context(ac); | |
1319 | ||
c1e8d35e TM |
1320 | if (status) |
1321 | mlog_errno(status); | |
ccd979bd MF |
1322 | return status; |
1323 | } | |
1324 |