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328970de | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
ccd979bd MF |
2 | /* -*- mode: c; c-basic-offset: 8; -*- |
3 | * vim: noexpandtab sw=8 ts=8 sts=0: | |
4 | * | |
5 | * localalloc.c | |
6 | * | |
7 | * Node local data allocation | |
8 | * | |
9 | * Copyright (C) 2002, 2004 Oracle. All rights reserved. | |
ccd979bd MF |
10 | */ |
11 | ||
12 | #include <linux/fs.h> | |
13 | #include <linux/types.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/highmem.h> | |
16 | #include <linux/bitops.h> | |
17 | ||
ccd979bd MF |
18 | #include <cluster/masklog.h> |
19 | ||
20 | #include "ocfs2.h" | |
21 | ||
22 | #include "alloc.h" | |
13723d00 | 23 | #include "blockcheck.h" |
ccd979bd MF |
24 | #include "dlmglue.h" |
25 | #include "inode.h" | |
26 | #include "journal.h" | |
27 | #include "localalloc.h" | |
28 | #include "suballoc.h" | |
29 | #include "super.h" | |
30 | #include "sysfile.h" | |
a04733d8 | 31 | #include "ocfs2_trace.h" |
ccd979bd MF |
32 | |
33 | #include "buffer_head_io.h" | |
34 | ||
35 | #define OCFS2_LOCAL_ALLOC(dinode) (&((dinode)->id2.i_lab)) | |
36 | ||
ccd979bd MF |
37 | static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc); |
38 | ||
39 | static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, | |
40 | struct ocfs2_dinode *alloc, | |
d02f00cc MF |
41 | u32 *numbits, |
42 | struct ocfs2_alloc_reservation *resv); | |
ccd979bd MF |
43 | |
44 | static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc); | |
45 | ||
46 | static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, | |
1fabe148 | 47 | handle_t *handle, |
ccd979bd MF |
48 | struct ocfs2_dinode *alloc, |
49 | struct inode *main_bm_inode, | |
50 | struct buffer_head *main_bm_bh); | |
51 | ||
52 | static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb, | |
ccd979bd MF |
53 | struct ocfs2_alloc_context **ac, |
54 | struct inode **bitmap_inode, | |
55 | struct buffer_head **bitmap_bh); | |
56 | ||
57 | static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, | |
1fabe148 | 58 | handle_t *handle, |
ccd979bd MF |
59 | struct ocfs2_alloc_context *ac); |
60 | ||
61 | static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, | |
62 | struct inode *local_alloc_inode); | |
63 | ||
6b82021b MF |
64 | /* |
65 | * ocfs2_la_default_mb() - determine a default size, in megabytes of | |
66 | * the local alloc. | |
67 | * | |
68 | * Generally, we'd like to pick as large a local alloc as | |
69 | * possible. Performance on large workloads tends to scale | |
70 | * proportionally to la size. In addition to that, the reservations | |
71 | * code functions more efficiently as it can reserve more windows for | |
72 | * write. | |
73 | * | |
74 | * Some things work against us when trying to choose a large local alloc: | |
75 | * | |
76 | * - We need to ensure our sizing is picked to leave enough space in | |
77 | * group descriptors for other allocations (such as block groups, | |
78 | * etc). Picking default sizes which are a multiple of 4 could help | |
79 | * - block groups are allocated in 2mb and 4mb chunks. | |
80 | * | |
81 | * - Likewise, we don't want to starve other nodes of bits on small | |
82 | * file systems. This can easily be taken care of by limiting our | |
83 | * default to a reasonable size (256M) on larger cluster sizes. | |
84 | * | |
85 | * - Some file systems can't support very large sizes - 4k and 8k in | |
86 | * particular are limited to less than 128 and 256 megabytes respectively. | |
87 | * | |
88 | * The following reference table shows group descriptor and local | |
89 | * alloc maximums at various cluster sizes (4k blocksize) | |
90 | * | |
91 | * csize: 4K group: 126M la: 121M | |
92 | * csize: 8K group: 252M la: 243M | |
93 | * csize: 16K group: 504M la: 486M | |
94 | * csize: 32K group: 1008M la: 972M | |
95 | * csize: 64K group: 2016M la: 1944M | |
96 | * csize: 128K group: 4032M la: 3888M | |
97 | * csize: 256K group: 8064M la: 7776M | |
98 | * csize: 512K group: 16128M la: 15552M | |
99 | * csize: 1024K group: 32256M la: 31104M | |
100 | */ | |
101 | #define OCFS2_LA_MAX_DEFAULT_MB 256 | |
102 | #define OCFS2_LA_OLD_DEFAULT 8 | |
103 | unsigned int ocfs2_la_default_mb(struct ocfs2_super *osb) | |
104 | { | |
105 | unsigned int la_mb; | |
106 | unsigned int gd_mb; | |
1739da40 | 107 | unsigned int la_max_mb; |
6b82021b MF |
108 | unsigned int megs_per_slot; |
109 | struct super_block *sb = osb->sb; | |
110 | ||
111 | gd_mb = ocfs2_clusters_to_megabytes(osb->sb, | |
8571882c | 112 | 8 * ocfs2_group_bitmap_size(sb, 0, osb->s_feature_incompat)); |
6b82021b MF |
113 | |
114 | /* | |
115 | * This takes care of files systems with very small group | |
116 | * descriptors - 512 byte blocksize at cluster sizes lower | |
117 | * than 16K and also 1k blocksize with 4k cluster size. | |
118 | */ | |
119 | if ((sb->s_blocksize == 512 && osb->s_clustersize <= 8192) | |
120 | || (sb->s_blocksize == 1024 && osb->s_clustersize == 4096)) | |
121 | return OCFS2_LA_OLD_DEFAULT; | |
122 | ||
123 | /* | |
124 | * Leave enough room for some block groups and make the final | |
125 | * value we work from a multiple of 4. | |
126 | */ | |
127 | gd_mb -= 16; | |
128 | gd_mb &= 0xFFFFFFFB; | |
129 | ||
130 | la_mb = gd_mb; | |
131 | ||
132 | /* | |
133 | * Keep window sizes down to a reasonable default | |
134 | */ | |
135 | if (la_mb > OCFS2_LA_MAX_DEFAULT_MB) { | |
136 | /* | |
137 | * Some clustersize / blocksize combinations will have | |
138 | * given us a larger than OCFS2_LA_MAX_DEFAULT_MB | |
139 | * default size, but get poor distribution when | |
140 | * limited to exactly 256 megabytes. | |
141 | * | |
142 | * As an example, 16K clustersize at 4K blocksize | |
143 | * gives us a cluster group size of 504M. Paring the | |
144 | * local alloc size down to 256 however, would give us | |
145 | * only one window and around 200MB left in the | |
146 | * cluster group. Instead, find the first size below | |
147 | * 256 which would give us an even distribution. | |
148 | * | |
149 | * Larger cluster group sizes actually work out pretty | |
150 | * well when pared to 256, so we don't have to do this | |
151 | * for any group that fits more than two | |
152 | * OCFS2_LA_MAX_DEFAULT_MB windows. | |
153 | */ | |
154 | if (gd_mb > (2 * OCFS2_LA_MAX_DEFAULT_MB)) | |
155 | la_mb = 256; | |
156 | else { | |
157 | unsigned int gd_mult = gd_mb; | |
158 | ||
159 | while (gd_mult > 256) | |
160 | gd_mult = gd_mult >> 1; | |
161 | ||
162 | la_mb = gd_mult; | |
163 | } | |
164 | } | |
165 | ||
166 | megs_per_slot = osb->osb_clusters_at_boot / osb->max_slots; | |
167 | megs_per_slot = ocfs2_clusters_to_megabytes(osb->sb, megs_per_slot); | |
168 | /* Too many nodes, too few disk clusters. */ | |
169 | if (megs_per_slot < la_mb) | |
170 | la_mb = megs_per_slot; | |
171 | ||
1739da40 TM |
172 | /* We can't store more bits than we can in a block. */ |
173 | la_max_mb = ocfs2_clusters_to_megabytes(osb->sb, | |
174 | ocfs2_local_alloc_size(sb) * 8); | |
175 | if (la_mb > la_max_mb) | |
176 | la_mb = la_max_mb; | |
177 | ||
6b82021b MF |
178 | return la_mb; |
179 | } | |
180 | ||
73c8a800 MF |
181 | void ocfs2_la_set_sizes(struct ocfs2_super *osb, int requested_mb) |
182 | { | |
183 | struct super_block *sb = osb->sb; | |
6b82021b | 184 | unsigned int la_default_mb = ocfs2_la_default_mb(osb); |
73c8a800 MF |
185 | unsigned int la_max_mb; |
186 | ||
187 | la_max_mb = ocfs2_clusters_to_megabytes(sb, | |
188 | ocfs2_local_alloc_size(sb) * 8); | |
189 | ||
a04733d8 | 190 | trace_ocfs2_la_set_sizes(requested_mb, la_max_mb, la_default_mb); |
73c8a800 MF |
191 | |
192 | if (requested_mb == -1) { | |
193 | /* No user request - use defaults */ | |
194 | osb->local_alloc_default_bits = | |
195 | ocfs2_megabytes_to_clusters(sb, la_default_mb); | |
196 | } else if (requested_mb > la_max_mb) { | |
197 | /* Request is too big, we give the maximum available */ | |
198 | osb->local_alloc_default_bits = | |
199 | ocfs2_megabytes_to_clusters(sb, la_max_mb); | |
200 | } else { | |
201 | osb->local_alloc_default_bits = | |
202 | ocfs2_megabytes_to_clusters(sb, requested_mb); | |
203 | } | |
204 | ||
205 | osb->local_alloc_bits = osb->local_alloc_default_bits; | |
206 | } | |
207 | ||
9c7af40b MF |
208 | static inline int ocfs2_la_state_enabled(struct ocfs2_super *osb) |
209 | { | |
210 | return (osb->local_alloc_state == OCFS2_LA_THROTTLED || | |
211 | osb->local_alloc_state == OCFS2_LA_ENABLED); | |
212 | } | |
213 | ||
214 | void ocfs2_local_alloc_seen_free_bits(struct ocfs2_super *osb, | |
215 | unsigned int num_clusters) | |
216 | { | |
217 | spin_lock(&osb->osb_lock); | |
218 | if (osb->local_alloc_state == OCFS2_LA_DISABLED || | |
219 | osb->local_alloc_state == OCFS2_LA_THROTTLED) | |
220 | if (num_clusters >= osb->local_alloc_default_bits) { | |
221 | cancel_delayed_work(&osb->la_enable_wq); | |
222 | osb->local_alloc_state = OCFS2_LA_ENABLED; | |
223 | } | |
224 | spin_unlock(&osb->osb_lock); | |
225 | } | |
226 | ||
227 | void ocfs2_la_enable_worker(struct work_struct *work) | |
228 | { | |
229 | struct ocfs2_super *osb = | |
230 | container_of(work, struct ocfs2_super, | |
231 | la_enable_wq.work); | |
232 | spin_lock(&osb->osb_lock); | |
233 | osb->local_alloc_state = OCFS2_LA_ENABLED; | |
234 | spin_unlock(&osb->osb_lock); | |
235 | } | |
236 | ||
ccd979bd MF |
237 | /* |
238 | * Tell us whether a given allocation should use the local alloc | |
239 | * file. Otherwise, it has to go to the main bitmap. | |
9c7af40b MF |
240 | * |
241 | * This function does semi-dirty reads of local alloc size and state! | |
242 | * This is ok however, as the values are re-checked once under mutex. | |
ccd979bd MF |
243 | */ |
244 | int ocfs2_alloc_should_use_local(struct ocfs2_super *osb, u64 bits) | |
245 | { | |
2fbe8d1e | 246 | int ret = 0; |
9c7af40b MF |
247 | int la_bits; |
248 | ||
249 | spin_lock(&osb->osb_lock); | |
250 | la_bits = osb->local_alloc_bits; | |
ccd979bd | 251 | |
9c7af40b | 252 | if (!ocfs2_la_state_enabled(osb)) |
2fbe8d1e | 253 | goto bail; |
ccd979bd MF |
254 | |
255 | /* la_bits should be at least twice the size (in clusters) of | |
256 | * a new block group. We want to be sure block group | |
257 | * allocations go through the local alloc, so allow an | |
258 | * allocation to take up to half the bitmap. */ | |
259 | if (bits > (la_bits / 2)) | |
2fbe8d1e | 260 | goto bail; |
ccd979bd | 261 | |
2fbe8d1e SM |
262 | ret = 1; |
263 | bail: | |
a04733d8 TM |
264 | trace_ocfs2_alloc_should_use_local( |
265 | (unsigned long long)bits, osb->local_alloc_state, la_bits, ret); | |
9c7af40b | 266 | spin_unlock(&osb->osb_lock); |
2fbe8d1e | 267 | return ret; |
ccd979bd MF |
268 | } |
269 | ||
270 | int ocfs2_load_local_alloc(struct ocfs2_super *osb) | |
271 | { | |
272 | int status = 0; | |
273 | struct ocfs2_dinode *alloc = NULL; | |
274 | struct buffer_head *alloc_bh = NULL; | |
275 | u32 num_used; | |
276 | struct inode *inode = NULL; | |
277 | struct ocfs2_local_alloc *la; | |
278 | ||
ebcee4b5 | 279 | if (osb->local_alloc_bits == 0) |
2fbe8d1e SM |
280 | goto bail; |
281 | ||
ebcee4b5 | 282 | if (osb->local_alloc_bits >= osb->bitmap_cpg) { |
2fbe8d1e SM |
283 | mlog(ML_NOTICE, "Requested local alloc window %d is larger " |
284 | "than max possible %u. Using defaults.\n", | |
ebcee4b5 MF |
285 | osb->local_alloc_bits, (osb->bitmap_cpg - 1)); |
286 | osb->local_alloc_bits = | |
287 | ocfs2_megabytes_to_clusters(osb->sb, | |
6b82021b | 288 | ocfs2_la_default_mb(osb)); |
2fbe8d1e SM |
289 | } |
290 | ||
ccd979bd MF |
291 | /* read the alloc off disk */ |
292 | inode = ocfs2_get_system_file_inode(osb, LOCAL_ALLOC_SYSTEM_INODE, | |
293 | osb->slot_num); | |
294 | if (!inode) { | |
295 | status = -EINVAL; | |
296 | mlog_errno(status); | |
297 | goto bail; | |
298 | } | |
299 | ||
b657c95c JB |
300 | status = ocfs2_read_inode_block_full(inode, &alloc_bh, |
301 | OCFS2_BH_IGNORE_CACHE); | |
ccd979bd MF |
302 | if (status < 0) { |
303 | mlog_errno(status); | |
304 | goto bail; | |
305 | } | |
306 | ||
307 | alloc = (struct ocfs2_dinode *) alloc_bh->b_data; | |
308 | la = OCFS2_LOCAL_ALLOC(alloc); | |
309 | ||
310 | if (!(le32_to_cpu(alloc->i_flags) & | |
311 | (OCFS2_LOCAL_ALLOC_FL|OCFS2_BITMAP_FL))) { | |
b0697053 MF |
312 | mlog(ML_ERROR, "Invalid local alloc inode, %llu\n", |
313 | (unsigned long long)OCFS2_I(inode)->ip_blkno); | |
ccd979bd MF |
314 | status = -EINVAL; |
315 | goto bail; | |
316 | } | |
317 | ||
318 | if ((la->la_size == 0) || | |
319 | (le16_to_cpu(la->la_size) > ocfs2_local_alloc_size(inode->i_sb))) { | |
320 | mlog(ML_ERROR, "Local alloc size is invalid (la_size = %u)\n", | |
321 | le16_to_cpu(la->la_size)); | |
322 | status = -EINVAL; | |
323 | goto bail; | |
324 | } | |
325 | ||
326 | /* do a little verification. */ | |
327 | num_used = ocfs2_local_alloc_count_bits(alloc); | |
328 | ||
329 | /* hopefully the local alloc has always been recovered before | |
330 | * we load it. */ | |
331 | if (num_used | |
332 | || alloc->id1.bitmap1.i_used | |
333 | || alloc->id1.bitmap1.i_total | |
532e1e54 JB |
334 | || la->la_bm_off) { |
335 | mlog(ML_ERROR, "inconsistent detected, clean journal with" | |
336 | " unrecovered local alloc, please run fsck.ocfs2!\n" | |
ccd979bd MF |
337 | "found = %u, set = %u, taken = %u, off = %u\n", |
338 | num_used, le32_to_cpu(alloc->id1.bitmap1.i_used), | |
339 | le32_to_cpu(alloc->id1.bitmap1.i_total), | |
340 | OCFS2_LOCAL_ALLOC(alloc)->la_bm_off); | |
341 | ||
532e1e54 JB |
342 | status = -EINVAL; |
343 | goto bail; | |
344 | } | |
345 | ||
ccd979bd MF |
346 | osb->local_alloc_bh = alloc_bh; |
347 | osb->local_alloc_state = OCFS2_LA_ENABLED; | |
348 | ||
349 | bail: | |
350 | if (status < 0) | |
a81cb88b | 351 | brelse(alloc_bh); |
72865d92 | 352 | iput(inode); |
ccd979bd | 353 | |
a04733d8 | 354 | trace_ocfs2_load_local_alloc(osb->local_alloc_bits); |
2fbe8d1e | 355 | |
c1e8d35e TM |
356 | if (status) |
357 | mlog_errno(status); | |
ccd979bd MF |
358 | return status; |
359 | } | |
360 | ||
361 | /* | |
362 | * return any unused bits to the bitmap and write out a clean | |
363 | * local_alloc. | |
364 | * | |
365 | * local_alloc_bh is optional. If not passed, we will simply use the | |
366 | * one off osb. If you do pass it however, be warned that it *will* be | |
367 | * returned brelse'd and NULL'd out.*/ | |
368 | void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb) | |
369 | { | |
370 | int status; | |
1fabe148 | 371 | handle_t *handle; |
ccd979bd MF |
372 | struct inode *local_alloc_inode = NULL; |
373 | struct buffer_head *bh = NULL; | |
374 | struct buffer_head *main_bm_bh = NULL; | |
375 | struct inode *main_bm_inode = NULL; | |
376 | struct ocfs2_dinode *alloc_copy = NULL; | |
377 | struct ocfs2_dinode *alloc = NULL; | |
378 | ||
9c7af40b | 379 | cancel_delayed_work(&osb->la_enable_wq); |
b918c430 YL |
380 | if (osb->ocfs2_wq) |
381 | flush_workqueue(osb->ocfs2_wq); | |
9c7af40b | 382 | |
ccd979bd | 383 | if (osb->local_alloc_state == OCFS2_LA_UNUSED) |
8898a5a5 | 384 | goto out; |
ccd979bd MF |
385 | |
386 | local_alloc_inode = | |
387 | ocfs2_get_system_file_inode(osb, | |
388 | LOCAL_ALLOC_SYSTEM_INODE, | |
389 | osb->slot_num); | |
390 | if (!local_alloc_inode) { | |
391 | status = -ENOENT; | |
392 | mlog_errno(status); | |
8898a5a5 | 393 | goto out; |
ccd979bd MF |
394 | } |
395 | ||
396 | osb->local_alloc_state = OCFS2_LA_DISABLED; | |
397 | ||
d02f00cc MF |
398 | ocfs2_resmap_uninit(&osb->osb_la_resmap); |
399 | ||
ccd979bd MF |
400 | main_bm_inode = ocfs2_get_system_file_inode(osb, |
401 | GLOBAL_BITMAP_SYSTEM_INODE, | |
402 | OCFS2_INVALID_SLOT); | |
403 | if (!main_bm_inode) { | |
404 | status = -EINVAL; | |
405 | mlog_errno(status); | |
8898a5a5 | 406 | goto out; |
ccd979bd MF |
407 | } |
408 | ||
5955102c | 409 | inode_lock(main_bm_inode); |
8898a5a5 | 410 | |
e63aecb6 | 411 | status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1); |
ccd979bd MF |
412 | if (status < 0) { |
413 | mlog_errno(status); | |
8898a5a5 | 414 | goto out_mutex; |
ccd979bd MF |
415 | } |
416 | ||
417 | /* WINDOW_MOVE_CREDITS is a bit heavy... */ | |
65eff9cc | 418 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
ccd979bd MF |
419 | if (IS_ERR(handle)) { |
420 | mlog_errno(PTR_ERR(handle)); | |
421 | handle = NULL; | |
8898a5a5 | 422 | goto out_unlock; |
ccd979bd MF |
423 | } |
424 | ||
425 | bh = osb->local_alloc_bh; | |
426 | alloc = (struct ocfs2_dinode *) bh->b_data; | |
427 | ||
d8b2fa65 | 428 | alloc_copy = kmemdup(alloc, bh->b_size, GFP_NOFS); |
ccd979bd MF |
429 | if (!alloc_copy) { |
430 | status = -ENOMEM; | |
8898a5a5 | 431 | goto out_commit; |
ccd979bd | 432 | } |
ccd979bd | 433 | |
0cf2f763 JB |
434 | status = ocfs2_journal_access_di(handle, INODE_CACHE(local_alloc_inode), |
435 | bh, OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
436 | if (status < 0) { |
437 | mlog_errno(status); | |
8898a5a5 | 438 | goto out_commit; |
ccd979bd MF |
439 | } |
440 | ||
441 | ocfs2_clear_local_alloc(alloc); | |
ec20cec7 | 442 | ocfs2_journal_dirty(handle, bh); |
ccd979bd MF |
443 | |
444 | brelse(bh); | |
445 | osb->local_alloc_bh = NULL; | |
446 | osb->local_alloc_state = OCFS2_LA_UNUSED; | |
447 | ||
448 | status = ocfs2_sync_local_to_main(osb, handle, alloc_copy, | |
449 | main_bm_inode, main_bm_bh); | |
450 | if (status < 0) | |
451 | mlog_errno(status); | |
452 | ||
8898a5a5 | 453 | out_commit: |
02dc1af4 | 454 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 455 | |
8898a5a5 | 456 | out_unlock: |
a81cb88b | 457 | brelse(main_bm_bh); |
ccd979bd | 458 | |
e63aecb6 | 459 | ocfs2_inode_unlock(main_bm_inode, 1); |
ccd979bd | 460 | |
8898a5a5 | 461 | out_mutex: |
5955102c | 462 | inode_unlock(main_bm_inode); |
8898a5a5 MF |
463 | iput(main_bm_inode); |
464 | ||
465 | out: | |
72865d92 | 466 | iput(local_alloc_inode); |
ccd979bd | 467 | |
d787ab09 | 468 | kfree(alloc_copy); |
ccd979bd MF |
469 | } |
470 | ||
471 | /* | |
472 | * We want to free the bitmap bits outside of any recovery context as | |
473 | * we'll need a cluster lock to do so, but we must clear the local | |
474 | * alloc before giving up the recovered nodes journal. To solve this, | |
475 | * we kmalloc a copy of the local alloc before it's change for the | |
476 | * caller to process with ocfs2_complete_local_alloc_recovery | |
477 | */ | |
478 | int ocfs2_begin_local_alloc_recovery(struct ocfs2_super *osb, | |
479 | int slot_num, | |
480 | struct ocfs2_dinode **alloc_copy) | |
481 | { | |
482 | int status = 0; | |
483 | struct buffer_head *alloc_bh = NULL; | |
484 | struct inode *inode = NULL; | |
485 | struct ocfs2_dinode *alloc; | |
486 | ||
a04733d8 | 487 | trace_ocfs2_begin_local_alloc_recovery(slot_num); |
ccd979bd MF |
488 | |
489 | *alloc_copy = NULL; | |
490 | ||
491 | inode = ocfs2_get_system_file_inode(osb, | |
492 | LOCAL_ALLOC_SYSTEM_INODE, | |
493 | slot_num); | |
494 | if (!inode) { | |
495 | status = -EINVAL; | |
496 | mlog_errno(status); | |
497 | goto bail; | |
498 | } | |
499 | ||
5955102c | 500 | inode_lock(inode); |
ccd979bd | 501 | |
b657c95c JB |
502 | status = ocfs2_read_inode_block_full(inode, &alloc_bh, |
503 | OCFS2_BH_IGNORE_CACHE); | |
ccd979bd MF |
504 | if (status < 0) { |
505 | mlog_errno(status); | |
506 | goto bail; | |
507 | } | |
508 | ||
509 | *alloc_copy = kmalloc(alloc_bh->b_size, GFP_KERNEL); | |
510 | if (!(*alloc_copy)) { | |
511 | status = -ENOMEM; | |
512 | goto bail; | |
513 | } | |
514 | memcpy((*alloc_copy), alloc_bh->b_data, alloc_bh->b_size); | |
515 | ||
516 | alloc = (struct ocfs2_dinode *) alloc_bh->b_data; | |
517 | ocfs2_clear_local_alloc(alloc); | |
518 | ||
13723d00 | 519 | ocfs2_compute_meta_ecc(osb->sb, alloc_bh->b_data, &alloc->i_check); |
8cb471e8 | 520 | status = ocfs2_write_block(osb, alloc_bh, INODE_CACHE(inode)); |
ccd979bd MF |
521 | if (status < 0) |
522 | mlog_errno(status); | |
523 | ||
524 | bail: | |
d787ab09 | 525 | if (status < 0) { |
ccd979bd MF |
526 | kfree(*alloc_copy); |
527 | *alloc_copy = NULL; | |
528 | } | |
529 | ||
a81cb88b | 530 | brelse(alloc_bh); |
ccd979bd MF |
531 | |
532 | if (inode) { | |
5955102c | 533 | inode_unlock(inode); |
ccd979bd MF |
534 | iput(inode); |
535 | } | |
536 | ||
c1e8d35e TM |
537 | if (status) |
538 | mlog_errno(status); | |
ccd979bd MF |
539 | return status; |
540 | } | |
541 | ||
542 | /* | |
543 | * Step 2: By now, we've completed the journal recovery, we've stamped | |
544 | * a clean local alloc on disk and dropped the node out of the | |
545 | * recovery map. Dlm locks will no longer stall, so lets clear out the | |
546 | * main bitmap. | |
547 | */ | |
548 | int ocfs2_complete_local_alloc_recovery(struct ocfs2_super *osb, | |
549 | struct ocfs2_dinode *alloc) | |
550 | { | |
551 | int status; | |
1fabe148 | 552 | handle_t *handle; |
ccd979bd | 553 | struct buffer_head *main_bm_bh = NULL; |
8898a5a5 | 554 | struct inode *main_bm_inode; |
ccd979bd | 555 | |
ccd979bd MF |
556 | main_bm_inode = ocfs2_get_system_file_inode(osb, |
557 | GLOBAL_BITMAP_SYSTEM_INODE, | |
558 | OCFS2_INVALID_SLOT); | |
559 | if (!main_bm_inode) { | |
560 | status = -EINVAL; | |
561 | mlog_errno(status); | |
8898a5a5 | 562 | goto out; |
ccd979bd MF |
563 | } |
564 | ||
5955102c | 565 | inode_lock(main_bm_inode); |
8898a5a5 | 566 | |
e63aecb6 | 567 | status = ocfs2_inode_lock(main_bm_inode, &main_bm_bh, 1); |
ccd979bd MF |
568 | if (status < 0) { |
569 | mlog_errno(status); | |
8898a5a5 | 570 | goto out_mutex; |
ccd979bd MF |
571 | } |
572 | ||
65eff9cc | 573 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
ccd979bd MF |
574 | if (IS_ERR(handle)) { |
575 | status = PTR_ERR(handle); | |
576 | handle = NULL; | |
577 | mlog_errno(status); | |
8898a5a5 | 578 | goto out_unlock; |
ccd979bd MF |
579 | } |
580 | ||
581 | /* we want the bitmap change to be recorded on disk asap */ | |
1fabe148 | 582 | handle->h_sync = 1; |
ccd979bd MF |
583 | |
584 | status = ocfs2_sync_local_to_main(osb, handle, alloc, | |
585 | main_bm_inode, main_bm_bh); | |
586 | if (status < 0) | |
587 | mlog_errno(status); | |
588 | ||
02dc1af4 | 589 | ocfs2_commit_trans(osb, handle); |
8898a5a5 MF |
590 | |
591 | out_unlock: | |
e63aecb6 | 592 | ocfs2_inode_unlock(main_bm_inode, 1); |
8898a5a5 MF |
593 | |
594 | out_mutex: | |
5955102c | 595 | inode_unlock(main_bm_inode); |
ccd979bd | 596 | |
a81cb88b | 597 | brelse(main_bm_bh); |
ccd979bd | 598 | |
8898a5a5 | 599 | iput(main_bm_inode); |
ccd979bd | 600 | |
8898a5a5 | 601 | out: |
4d0ddb2c | 602 | if (!status) |
b89c5428 | 603 | ocfs2_init_steal_slots(osb); |
c1e8d35e TM |
604 | if (status) |
605 | mlog_errno(status); | |
ccd979bd MF |
606 | return status; |
607 | } | |
608 | ||
609 | /* | |
9c7af40b | 610 | * make sure we've got at least bits_wanted contiguous bits in the |
1b1dcc1b | 611 | * local alloc. You lose them when you drop i_mutex. |
ccd979bd MF |
612 | * |
613 | * We will add ourselves to the transaction passed in, but may start | |
614 | * our own in order to shift windows. | |
615 | */ | |
616 | int ocfs2_reserve_local_alloc_bits(struct ocfs2_super *osb, | |
ccd979bd MF |
617 | u32 bits_wanted, |
618 | struct ocfs2_alloc_context *ac) | |
619 | { | |
620 | int status; | |
621 | struct ocfs2_dinode *alloc; | |
622 | struct inode *local_alloc_inode; | |
623 | unsigned int free_bits; | |
624 | ||
ccd979bd | 625 | BUG_ON(!ac); |
ccd979bd MF |
626 | |
627 | local_alloc_inode = | |
628 | ocfs2_get_system_file_inode(osb, | |
629 | LOCAL_ALLOC_SYSTEM_INODE, | |
630 | osb->slot_num); | |
631 | if (!local_alloc_inode) { | |
632 | status = -ENOENT; | |
633 | mlog_errno(status); | |
634 | goto bail; | |
635 | } | |
da5cbf2f | 636 | |
5955102c | 637 | inode_lock(local_alloc_inode); |
da5cbf2f | 638 | |
9c7af40b MF |
639 | /* |
640 | * We must double check state and allocator bits because | |
641 | * another process may have changed them while holding i_mutex. | |
642 | */ | |
643 | spin_lock(&osb->osb_lock); | |
644 | if (!ocfs2_la_state_enabled(osb) || | |
645 | (bits_wanted > osb->local_alloc_bits)) { | |
646 | spin_unlock(&osb->osb_lock); | |
ccd979bd MF |
647 | status = -ENOSPC; |
648 | goto bail; | |
649 | } | |
9c7af40b | 650 | spin_unlock(&osb->osb_lock); |
ccd979bd MF |
651 | |
652 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
653 | ||
e407e397 | 654 | #ifdef CONFIG_OCFS2_DEBUG_FS |
ccd979bd MF |
655 | if (le32_to_cpu(alloc->id1.bitmap1.i_used) != |
656 | ocfs2_local_alloc_count_bits(alloc)) { | |
93f5920d JP |
657 | status = ocfs2_error(osb->sb, "local alloc inode %llu says it has %u used bits, but a count shows %u\n", |
658 | (unsigned long long)le64_to_cpu(alloc->i_blkno), | |
659 | le32_to_cpu(alloc->id1.bitmap1.i_used), | |
660 | ocfs2_local_alloc_count_bits(alloc)); | |
ccd979bd MF |
661 | goto bail; |
662 | } | |
5a58c3ef | 663 | #endif |
ccd979bd MF |
664 | |
665 | free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) - | |
666 | le32_to_cpu(alloc->id1.bitmap1.i_used); | |
667 | if (bits_wanted > free_bits) { | |
668 | /* uhoh, window change time. */ | |
669 | status = | |
670 | ocfs2_local_alloc_slide_window(osb, local_alloc_inode); | |
671 | if (status < 0) { | |
672 | if (status != -ENOSPC) | |
673 | mlog_errno(status); | |
674 | goto bail; | |
675 | } | |
9c7af40b MF |
676 | |
677 | /* | |
678 | * Under certain conditions, the window slide code | |
679 | * might have reduced the number of bits available or | |
679edeb0 | 680 | * disabled the local alloc entirely. Re-check |
9c7af40b MF |
681 | * here and return -ENOSPC if necessary. |
682 | */ | |
683 | status = -ENOSPC; | |
684 | if (!ocfs2_la_state_enabled(osb)) | |
685 | goto bail; | |
686 | ||
687 | free_bits = le32_to_cpu(alloc->id1.bitmap1.i_total) - | |
688 | le32_to_cpu(alloc->id1.bitmap1.i_used); | |
689 | if (bits_wanted > free_bits) | |
690 | goto bail; | |
ccd979bd MF |
691 | } |
692 | ||
8fccfc82 | 693 | ac->ac_inode = local_alloc_inode; |
a4a48911 TM |
694 | /* We should never use localalloc from another slot */ |
695 | ac->ac_alloc_slot = osb->slot_num; | |
8fccfc82 | 696 | ac->ac_which = OCFS2_AC_USE_LOCAL; |
ccd979bd MF |
697 | get_bh(osb->local_alloc_bh); |
698 | ac->ac_bh = osb->local_alloc_bh; | |
ccd979bd MF |
699 | status = 0; |
700 | bail: | |
bda0233b | 701 | if (status < 0 && local_alloc_inode) { |
5955102c | 702 | inode_unlock(local_alloc_inode); |
8fccfc82 | 703 | iput(local_alloc_inode); |
bda0233b | 704 | } |
ccd979bd | 705 | |
a04733d8 TM |
706 | trace_ocfs2_reserve_local_alloc_bits( |
707 | (unsigned long long)ac->ac_max_block, | |
708 | bits_wanted, osb->slot_num, status); | |
2fbe8d1e | 709 | |
c1e8d35e TM |
710 | if (status) |
711 | mlog_errno(status); | |
ccd979bd MF |
712 | return status; |
713 | } | |
714 | ||
715 | int ocfs2_claim_local_alloc_bits(struct ocfs2_super *osb, | |
1fabe148 | 716 | handle_t *handle, |
ccd979bd | 717 | struct ocfs2_alloc_context *ac, |
415cb800 | 718 | u32 bits_wanted, |
ccd979bd MF |
719 | u32 *bit_off, |
720 | u32 *num_bits) | |
721 | { | |
722 | int status, start; | |
723 | struct inode *local_alloc_inode; | |
ccd979bd MF |
724 | void *bitmap; |
725 | struct ocfs2_dinode *alloc; | |
726 | struct ocfs2_local_alloc *la; | |
727 | ||
ccd979bd MF |
728 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL); |
729 | ||
ccd979bd MF |
730 | local_alloc_inode = ac->ac_inode; |
731 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
732 | la = OCFS2_LOCAL_ALLOC(alloc); | |
733 | ||
d02f00cc MF |
734 | start = ocfs2_local_alloc_find_clear_bits(osb, alloc, &bits_wanted, |
735 | ac->ac_resv); | |
ccd979bd MF |
736 | if (start == -1) { |
737 | /* TODO: Shouldn't we just BUG here? */ | |
738 | status = -ENOSPC; | |
739 | mlog_errno(status); | |
740 | goto bail; | |
741 | } | |
742 | ||
743 | bitmap = la->la_bitmap; | |
744 | *bit_off = le32_to_cpu(la->la_bm_off) + start; | |
ccd979bd MF |
745 | *num_bits = bits_wanted; |
746 | ||
0cf2f763 JB |
747 | status = ocfs2_journal_access_di(handle, |
748 | INODE_CACHE(local_alloc_inode), | |
13723d00 JB |
749 | osb->local_alloc_bh, |
750 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
751 | if (status < 0) { |
752 | mlog_errno(status); | |
753 | goto bail; | |
754 | } | |
755 | ||
d02f00cc MF |
756 | ocfs2_resmap_claimed_bits(&osb->osb_la_resmap, ac->ac_resv, start, |
757 | bits_wanted); | |
758 | ||
ccd979bd MF |
759 | while(bits_wanted--) |
760 | ocfs2_set_bit(start++, bitmap); | |
761 | ||
0dd3256e | 762 | le32_add_cpu(&alloc->id1.bitmap1.i_used, *num_bits); |
ec20cec7 | 763 | ocfs2_journal_dirty(handle, osb->local_alloc_bh); |
ccd979bd | 764 | |
ccd979bd | 765 | bail: |
c1e8d35e TM |
766 | if (status) |
767 | mlog_errno(status); | |
ccd979bd MF |
768 | return status; |
769 | } | |
770 | ||
fb951eb5 ZW |
771 | int ocfs2_free_local_alloc_bits(struct ocfs2_super *osb, |
772 | handle_t *handle, | |
773 | struct ocfs2_alloc_context *ac, | |
774 | u32 bit_off, | |
775 | u32 num_bits) | |
776 | { | |
777 | int status, start; | |
778 | u32 clear_bits; | |
779 | struct inode *local_alloc_inode; | |
780 | void *bitmap; | |
781 | struct ocfs2_dinode *alloc; | |
782 | struct ocfs2_local_alloc *la; | |
783 | ||
784 | BUG_ON(ac->ac_which != OCFS2_AC_USE_LOCAL); | |
785 | ||
786 | local_alloc_inode = ac->ac_inode; | |
787 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
788 | la = OCFS2_LOCAL_ALLOC(alloc); | |
789 | ||
790 | bitmap = la->la_bitmap; | |
791 | start = bit_off - le32_to_cpu(la->la_bm_off); | |
792 | clear_bits = num_bits; | |
793 | ||
794 | status = ocfs2_journal_access_di(handle, | |
795 | INODE_CACHE(local_alloc_inode), | |
796 | osb->local_alloc_bh, | |
797 | OCFS2_JOURNAL_ACCESS_WRITE); | |
798 | if (status < 0) { | |
799 | mlog_errno(status); | |
800 | goto bail; | |
801 | } | |
802 | ||
803 | while (clear_bits--) | |
804 | ocfs2_clear_bit(start++, bitmap); | |
805 | ||
806 | le32_add_cpu(&alloc->id1.bitmap1.i_used, -num_bits); | |
807 | ocfs2_journal_dirty(handle, osb->local_alloc_bh); | |
808 | ||
809 | bail: | |
810 | return status; | |
811 | } | |
812 | ||
ccd979bd MF |
813 | static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc) |
814 | { | |
a75613ec | 815 | u32 count; |
ccd979bd MF |
816 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); |
817 | ||
a75613ec | 818 | count = memweight(la->la_bitmap, le16_to_cpu(la->la_size)); |
ccd979bd | 819 | |
a04733d8 | 820 | trace_ocfs2_local_alloc_count_bits(count); |
ccd979bd MF |
821 | return count; |
822 | } | |
823 | ||
824 | static int ocfs2_local_alloc_find_clear_bits(struct ocfs2_super *osb, | |
d02f00cc MF |
825 | struct ocfs2_dinode *alloc, |
826 | u32 *numbits, | |
827 | struct ocfs2_alloc_reservation *resv) | |
ccd979bd | 828 | { |
dec5b0d4 | 829 | int numfound = 0, bitoff, left, startoff; |
d02f00cc MF |
830 | int local_resv = 0; |
831 | struct ocfs2_alloc_reservation r; | |
ccd979bd | 832 | void *bitmap = NULL; |
d02f00cc | 833 | struct ocfs2_reservation_map *resmap = &osb->osb_la_resmap; |
ccd979bd | 834 | |
ccd979bd | 835 | if (!alloc->id1.bitmap1.i_total) { |
ccd979bd MF |
836 | bitoff = -1; |
837 | goto bail; | |
838 | } | |
839 | ||
d02f00cc MF |
840 | if (!resv) { |
841 | local_resv = 1; | |
842 | ocfs2_resv_init_once(&r); | |
843 | ocfs2_resv_set_type(&r, OCFS2_RESV_FLAG_TMP); | |
844 | resv = &r; | |
845 | } | |
846 | ||
847 | numfound = *numbits; | |
848 | if (ocfs2_resmap_resv_bits(resmap, resv, &bitoff, &numfound) == 0) { | |
849 | if (numfound < *numbits) | |
850 | *numbits = numfound; | |
851 | goto bail; | |
852 | } | |
853 | ||
854 | /* | |
855 | * Code error. While reservations are enabled, local | |
856 | * allocation should _always_ go through them. | |
857 | */ | |
858 | BUG_ON(osb->osb_resv_level != 0); | |
859 | ||
860 | /* | |
861 | * Reservations are disabled. Handle this the old way. | |
862 | */ | |
863 | ||
ccd979bd MF |
864 | bitmap = OCFS2_LOCAL_ALLOC(alloc)->la_bitmap; |
865 | ||
866 | numfound = bitoff = startoff = 0; | |
ccd979bd MF |
867 | left = le32_to_cpu(alloc->id1.bitmap1.i_total); |
868 | while ((bitoff = ocfs2_find_next_zero_bit(bitmap, left, startoff)) != -1) { | |
869 | if (bitoff == left) { | |
870 | /* mlog(0, "bitoff (%d) == left", bitoff); */ | |
871 | break; | |
872 | } | |
873 | /* mlog(0, "Found a zero: bitoff = %d, startoff = %d, " | |
874 | "numfound = %d\n", bitoff, startoff, numfound);*/ | |
875 | ||
876 | /* Ok, we found a zero bit... is it contig. or do we | |
877 | * start over?*/ | |
878 | if (bitoff == startoff) { | |
879 | /* we found a zero */ | |
880 | numfound++; | |
881 | startoff++; | |
882 | } else { | |
883 | /* got a zero after some ones */ | |
884 | numfound = 1; | |
885 | startoff = bitoff+1; | |
886 | } | |
887 | /* we got everything we needed */ | |
d02f00cc | 888 | if (numfound == *numbits) { |
ccd979bd MF |
889 | /* mlog(0, "Found it all!\n"); */ |
890 | break; | |
891 | } | |
892 | } | |
893 | ||
a04733d8 | 894 | trace_ocfs2_local_alloc_find_clear_bits_search_bitmap(bitoff, numfound); |
ccd979bd | 895 | |
3e4218df | 896 | if (numfound == *numbits) |
ccd979bd | 897 | bitoff = startoff - numfound; |
3e4218df | 898 | else |
ccd979bd MF |
899 | bitoff = -1; |
900 | ||
901 | bail: | |
d02f00cc MF |
902 | if (local_resv) |
903 | ocfs2_resv_discard(resmap, resv); | |
904 | ||
a04733d8 TM |
905 | trace_ocfs2_local_alloc_find_clear_bits(*numbits, |
906 | le32_to_cpu(alloc->id1.bitmap1.i_total), | |
907 | bitoff, numfound); | |
908 | ||
ccd979bd MF |
909 | return bitoff; |
910 | } | |
911 | ||
912 | static void ocfs2_clear_local_alloc(struct ocfs2_dinode *alloc) | |
913 | { | |
914 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); | |
915 | int i; | |
ccd979bd MF |
916 | |
917 | alloc->id1.bitmap1.i_total = 0; | |
918 | alloc->id1.bitmap1.i_used = 0; | |
919 | la->la_bm_off = 0; | |
920 | for(i = 0; i < le16_to_cpu(la->la_size); i++) | |
921 | la->la_bitmap[i] = 0; | |
ccd979bd MF |
922 | } |
923 | ||
924 | #if 0 | |
925 | /* turn this on and uncomment below to aid debugging window shifts. */ | |
926 | static void ocfs2_verify_zero_bits(unsigned long *bitmap, | |
927 | unsigned int start, | |
928 | unsigned int count) | |
929 | { | |
930 | unsigned int tmp = count; | |
931 | while(tmp--) { | |
932 | if (ocfs2_test_bit(start + tmp, bitmap)) { | |
933 | printk("ocfs2_verify_zero_bits: start = %u, count = " | |
934 | "%u\n", start, count); | |
935 | printk("ocfs2_verify_zero_bits: bit %u is set!", | |
936 | start + tmp); | |
937 | BUG(); | |
938 | } | |
939 | } | |
940 | } | |
941 | #endif | |
942 | ||
943 | /* | |
944 | * sync the local alloc to main bitmap. | |
945 | * | |
946 | * assumes you've already locked the main bitmap -- the bitmap inode | |
947 | * passed is used for caching. | |
948 | */ | |
949 | static int ocfs2_sync_local_to_main(struct ocfs2_super *osb, | |
1fabe148 | 950 | handle_t *handle, |
ccd979bd MF |
951 | struct ocfs2_dinode *alloc, |
952 | struct inode *main_bm_inode, | |
953 | struct buffer_head *main_bm_bh) | |
954 | { | |
955 | int status = 0; | |
956 | int bit_off, left, count, start; | |
957 | u64 la_start_blk; | |
958 | u64 blkno; | |
959 | void *bitmap; | |
960 | struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc); | |
961 | ||
a04733d8 | 962 | trace_ocfs2_sync_local_to_main( |
ef6b689b TM |
963 | le32_to_cpu(alloc->id1.bitmap1.i_total), |
964 | le32_to_cpu(alloc->id1.bitmap1.i_used)); | |
ccd979bd MF |
965 | |
966 | if (!alloc->id1.bitmap1.i_total) { | |
ccd979bd MF |
967 | goto bail; |
968 | } | |
969 | ||
970 | if (le32_to_cpu(alloc->id1.bitmap1.i_used) == | |
971 | le32_to_cpu(alloc->id1.bitmap1.i_total)) { | |
ccd979bd MF |
972 | goto bail; |
973 | } | |
974 | ||
975 | la_start_blk = ocfs2_clusters_to_blocks(osb->sb, | |
976 | le32_to_cpu(la->la_bm_off)); | |
977 | bitmap = la->la_bitmap; | |
978 | start = count = bit_off = 0; | |
979 | left = le32_to_cpu(alloc->id1.bitmap1.i_total); | |
980 | ||
981 | while ((bit_off = ocfs2_find_next_zero_bit(bitmap, left, start)) | |
982 | != -1) { | |
983 | if ((bit_off < left) && (bit_off == start)) { | |
984 | count++; | |
985 | start++; | |
986 | continue; | |
987 | } | |
988 | if (count) { | |
989 | blkno = la_start_blk + | |
990 | ocfs2_clusters_to_blocks(osb->sb, | |
991 | start - count); | |
992 | ||
a04733d8 | 993 | trace_ocfs2_sync_local_to_main_free( |
b0697053 MF |
994 | count, start - count, |
995 | (unsigned long long)la_start_blk, | |
996 | (unsigned long long)blkno); | |
ccd979bd | 997 | |
b4414eea MF |
998 | status = ocfs2_release_clusters(handle, |
999 | main_bm_inode, | |
1000 | main_bm_bh, blkno, | |
1001 | count); | |
ccd979bd MF |
1002 | if (status < 0) { |
1003 | mlog_errno(status); | |
1004 | goto bail; | |
1005 | } | |
1006 | } | |
1007 | if (bit_off >= left) | |
1008 | break; | |
1009 | count = 1; | |
1010 | start = bit_off + 1; | |
1011 | } | |
1012 | ||
1013 | bail: | |
c1e8d35e TM |
1014 | if (status) |
1015 | mlog_errno(status); | |
ccd979bd MF |
1016 | return status; |
1017 | } | |
1018 | ||
9c7af40b MF |
1019 | enum ocfs2_la_event { |
1020 | OCFS2_LA_EVENT_SLIDE, /* Normal window slide. */ | |
1021 | OCFS2_LA_EVENT_FRAGMENTED, /* The global bitmap has | |
1022 | * enough bits theoretically | |
1023 | * free, but a contiguous | |
1024 | * allocation could not be | |
1025 | * found. */ | |
1026 | OCFS2_LA_EVENT_ENOSPC, /* Global bitmap doesn't have | |
1027 | * enough bits free to satisfy | |
1028 | * our request. */ | |
1029 | }; | |
1030 | #define OCFS2_LA_ENABLE_INTERVAL (30 * HZ) | |
1031 | /* | |
1032 | * Given an event, calculate the size of our next local alloc window. | |
1033 | * | |
1034 | * This should always be called under i_mutex of the local alloc inode | |
1035 | * so that local alloc disabling doesn't race with processes trying to | |
1036 | * use the allocator. | |
1037 | * | |
1038 | * Returns the state which the local alloc was left in. This value can | |
1039 | * be ignored by some paths. | |
1040 | */ | |
1041 | static int ocfs2_recalc_la_window(struct ocfs2_super *osb, | |
1042 | enum ocfs2_la_event event) | |
1043 | { | |
1044 | unsigned int bits; | |
1045 | int state; | |
1046 | ||
1047 | spin_lock(&osb->osb_lock); | |
1048 | if (osb->local_alloc_state == OCFS2_LA_DISABLED) { | |
1049 | WARN_ON_ONCE(osb->local_alloc_state == OCFS2_LA_DISABLED); | |
1050 | goto out_unlock; | |
1051 | } | |
1052 | ||
1053 | /* | |
1054 | * ENOSPC and fragmentation are treated similarly for now. | |
1055 | */ | |
1056 | if (event == OCFS2_LA_EVENT_ENOSPC || | |
1057 | event == OCFS2_LA_EVENT_FRAGMENTED) { | |
1058 | /* | |
1059 | * We ran out of contiguous space in the primary | |
1060 | * bitmap. Drastically reduce the number of bits used | |
1061 | * by local alloc until we have to disable it. | |
1062 | */ | |
1063 | bits = osb->local_alloc_bits >> 1; | |
1064 | if (bits > ocfs2_megabytes_to_clusters(osb->sb, 1)) { | |
1065 | /* | |
1066 | * By setting state to THROTTLED, we'll keep | |
1067 | * the number of local alloc bits used down | |
1068 | * until an event occurs which would give us | |
1069 | * reason to assume the bitmap situation might | |
1070 | * have changed. | |
1071 | */ | |
1072 | osb->local_alloc_state = OCFS2_LA_THROTTLED; | |
1073 | osb->local_alloc_bits = bits; | |
1074 | } else { | |
1075 | osb->local_alloc_state = OCFS2_LA_DISABLED; | |
1076 | } | |
35ddf78e | 1077 | queue_delayed_work(osb->ocfs2_wq, &osb->la_enable_wq, |
9c7af40b MF |
1078 | OCFS2_LA_ENABLE_INTERVAL); |
1079 | goto out_unlock; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | * Don't increase the size of the local alloc window until we | |
1084 | * know we might be able to fulfill the request. Otherwise, we | |
1085 | * risk bouncing around the global bitmap during periods of | |
1086 | * low space. | |
1087 | */ | |
1088 | if (osb->local_alloc_state != OCFS2_LA_THROTTLED) | |
1089 | osb->local_alloc_bits = osb->local_alloc_default_bits; | |
1090 | ||
1091 | out_unlock: | |
1092 | state = osb->local_alloc_state; | |
1093 | spin_unlock(&osb->osb_lock); | |
1094 | ||
1095 | return state; | |
1096 | } | |
1097 | ||
ccd979bd | 1098 | static int ocfs2_local_alloc_reserve_for_window(struct ocfs2_super *osb, |
ccd979bd MF |
1099 | struct ocfs2_alloc_context **ac, |
1100 | struct inode **bitmap_inode, | |
1101 | struct buffer_head **bitmap_bh) | |
1102 | { | |
1103 | int status; | |
1104 | ||
cd861280 | 1105 | *ac = kzalloc(sizeof(struct ocfs2_alloc_context), GFP_KERNEL); |
ccd979bd MF |
1106 | if (!(*ac)) { |
1107 | status = -ENOMEM; | |
1108 | mlog_errno(status); | |
1109 | goto bail; | |
1110 | } | |
1111 | ||
9c7af40b | 1112 | retry_enospc: |
7e9b7937 | 1113 | (*ac)->ac_bits_wanted = osb->local_alloc_bits; |
ccd979bd | 1114 | status = ocfs2_reserve_cluster_bitmap_bits(osb, *ac); |
9c7af40b MF |
1115 | if (status == -ENOSPC) { |
1116 | if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_ENOSPC) == | |
1117 | OCFS2_LA_DISABLED) | |
1118 | goto bail; | |
1119 | ||
1120 | ocfs2_free_ac_resource(*ac); | |
1121 | memset(*ac, 0, sizeof(struct ocfs2_alloc_context)); | |
1122 | goto retry_enospc; | |
1123 | } | |
ccd979bd | 1124 | if (status < 0) { |
9c7af40b | 1125 | mlog_errno(status); |
ccd979bd MF |
1126 | goto bail; |
1127 | } | |
1128 | ||
1129 | *bitmap_inode = (*ac)->ac_inode; | |
1130 | igrab(*bitmap_inode); | |
1131 | *bitmap_bh = (*ac)->ac_bh; | |
1132 | get_bh(*bitmap_bh); | |
1133 | status = 0; | |
1134 | bail: | |
1135 | if ((status < 0) && *ac) { | |
1136 | ocfs2_free_alloc_context(*ac); | |
1137 | *ac = NULL; | |
1138 | } | |
1139 | ||
c1e8d35e TM |
1140 | if (status) |
1141 | mlog_errno(status); | |
ccd979bd MF |
1142 | return status; |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * pass it the bitmap lock in lock_bh if you have it. | |
1147 | */ | |
1148 | static int ocfs2_local_alloc_new_window(struct ocfs2_super *osb, | |
1fabe148 | 1149 | handle_t *handle, |
ccd979bd MF |
1150 | struct ocfs2_alloc_context *ac) |
1151 | { | |
1152 | int status = 0; | |
1153 | u32 cluster_off, cluster_count; | |
1154 | struct ocfs2_dinode *alloc = NULL; | |
1155 | struct ocfs2_local_alloc *la; | |
1156 | ||
ccd979bd MF |
1157 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; |
1158 | la = OCFS2_LOCAL_ALLOC(alloc); | |
1159 | ||
a04733d8 TM |
1160 | trace_ocfs2_local_alloc_new_window( |
1161 | le32_to_cpu(alloc->id1.bitmap1.i_total), | |
1162 | osb->local_alloc_bits); | |
883d4cae MF |
1163 | |
1164 | /* Instruct the allocation code to try the most recently used | |
1165 | * cluster group. We'll re-record the group used this pass | |
1166 | * below. */ | |
1167 | ac->ac_last_group = osb->la_last_gd; | |
1168 | ||
ccd979bd MF |
1169 | /* we used the generic suballoc reserve function, but we set |
1170 | * everything up nicely, so there's no reason why we can't use | |
1171 | * the more specific cluster api to claim bits. */ | |
1ed9b777 | 1172 | status = ocfs2_claim_clusters(handle, ac, osb->local_alloc_bits, |
ccd979bd | 1173 | &cluster_off, &cluster_count); |
9c7af40b MF |
1174 | if (status == -ENOSPC) { |
1175 | retry_enospc: | |
1176 | /* | |
1177 | * Note: We could also try syncing the journal here to | |
1178 | * allow use of any free bits which the current | |
1179 | * transaction can't give us access to. --Mark | |
1180 | */ | |
1181 | if (ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_FRAGMENTED) == | |
1182 | OCFS2_LA_DISABLED) | |
1183 | goto bail; | |
1184 | ||
7e9b7937 | 1185 | ac->ac_bits_wanted = osb->local_alloc_bits; |
1ed9b777 | 1186 | status = ocfs2_claim_clusters(handle, ac, |
9c7af40b MF |
1187 | osb->local_alloc_bits, |
1188 | &cluster_off, | |
1189 | &cluster_count); | |
1190 | if (status == -ENOSPC) | |
1191 | goto retry_enospc; | |
1192 | /* | |
1193 | * We only shrunk the *minimum* number of in our | |
1194 | * request - it's entirely possible that the allocator | |
1195 | * might give us more than we asked for. | |
1196 | */ | |
1197 | if (status == 0) { | |
1198 | spin_lock(&osb->osb_lock); | |
1199 | osb->local_alloc_bits = cluster_count; | |
1200 | spin_unlock(&osb->osb_lock); | |
1201 | } | |
1202 | } | |
ccd979bd MF |
1203 | if (status < 0) { |
1204 | if (status != -ENOSPC) | |
1205 | mlog_errno(status); | |
1206 | goto bail; | |
1207 | } | |
1208 | ||
883d4cae MF |
1209 | osb->la_last_gd = ac->ac_last_group; |
1210 | ||
ccd979bd MF |
1211 | la->la_bm_off = cpu_to_le32(cluster_off); |
1212 | alloc->id1.bitmap1.i_total = cpu_to_le32(cluster_count); | |
1213 | /* just in case... In the future when we find space ourselves, | |
1214 | * we don't have to get all contiguous -- but we'll have to | |
1215 | * set all previously used bits in bitmap and update | |
1216 | * la_bits_set before setting the bits in the main bitmap. */ | |
1217 | alloc->id1.bitmap1.i_used = 0; | |
1218 | memset(OCFS2_LOCAL_ALLOC(alloc)->la_bitmap, 0, | |
1219 | le16_to_cpu(la->la_size)); | |
1220 | ||
d02f00cc MF |
1221 | ocfs2_resmap_restart(&osb->osb_la_resmap, cluster_count, |
1222 | OCFS2_LOCAL_ALLOC(alloc)->la_bitmap); | |
1223 | ||
a04733d8 TM |
1224 | trace_ocfs2_local_alloc_new_window_result( |
1225 | OCFS2_LOCAL_ALLOC(alloc)->la_bm_off, | |
1226 | le32_to_cpu(alloc->id1.bitmap1.i_total)); | |
ccd979bd MF |
1227 | |
1228 | bail: | |
c1e8d35e TM |
1229 | if (status) |
1230 | mlog_errno(status); | |
ccd979bd MF |
1231 | return status; |
1232 | } | |
1233 | ||
1234 | /* Note that we do *NOT* lock the local alloc inode here as | |
1235 | * it's been locked already for us. */ | |
1236 | static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb, | |
1237 | struct inode *local_alloc_inode) | |
1238 | { | |
1239 | int status = 0; | |
1240 | struct buffer_head *main_bm_bh = NULL; | |
1241 | struct inode *main_bm_inode = NULL; | |
1fabe148 | 1242 | handle_t *handle = NULL; |
ccd979bd MF |
1243 | struct ocfs2_dinode *alloc; |
1244 | struct ocfs2_dinode *alloc_copy = NULL; | |
1245 | struct ocfs2_alloc_context *ac = NULL; | |
1246 | ||
9c7af40b MF |
1247 | ocfs2_recalc_la_window(osb, OCFS2_LA_EVENT_SLIDE); |
1248 | ||
ccd979bd MF |
1249 | /* This will lock the main bitmap for us. */ |
1250 | status = ocfs2_local_alloc_reserve_for_window(osb, | |
ccd979bd MF |
1251 | &ac, |
1252 | &main_bm_inode, | |
1253 | &main_bm_bh); | |
1254 | if (status < 0) { | |
1255 | if (status != -ENOSPC) | |
1256 | mlog_errno(status); | |
1257 | goto bail; | |
1258 | } | |
1259 | ||
65eff9cc | 1260 | handle = ocfs2_start_trans(osb, OCFS2_WINDOW_MOVE_CREDITS); |
ccd979bd MF |
1261 | if (IS_ERR(handle)) { |
1262 | status = PTR_ERR(handle); | |
1263 | handle = NULL; | |
1264 | mlog_errno(status); | |
1265 | goto bail; | |
1266 | } | |
1267 | ||
1268 | alloc = (struct ocfs2_dinode *) osb->local_alloc_bh->b_data; | |
1269 | ||
1270 | /* We want to clear the local alloc before doing anything | |
1271 | * else, so that if we error later during this operation, | |
1272 | * local alloc shutdown won't try to double free main bitmap | |
1273 | * bits. Make a copy so the sync function knows which bits to | |
1274 | * free. */ | |
d8b2fa65 | 1275 | alloc_copy = kmemdup(alloc, osb->local_alloc_bh->b_size, GFP_NOFS); |
ccd979bd MF |
1276 | if (!alloc_copy) { |
1277 | status = -ENOMEM; | |
1278 | mlog_errno(status); | |
1279 | goto bail; | |
1280 | } | |
ccd979bd | 1281 | |
0cf2f763 JB |
1282 | status = ocfs2_journal_access_di(handle, |
1283 | INODE_CACHE(local_alloc_inode), | |
13723d00 JB |
1284 | osb->local_alloc_bh, |
1285 | OCFS2_JOURNAL_ACCESS_WRITE); | |
ccd979bd MF |
1286 | if (status < 0) { |
1287 | mlog_errno(status); | |
1288 | goto bail; | |
1289 | } | |
1290 | ||
1291 | ocfs2_clear_local_alloc(alloc); | |
ec20cec7 | 1292 | ocfs2_journal_dirty(handle, osb->local_alloc_bh); |
ccd979bd MF |
1293 | |
1294 | status = ocfs2_sync_local_to_main(osb, handle, alloc_copy, | |
1295 | main_bm_inode, main_bm_bh); | |
1296 | if (status < 0) { | |
1297 | mlog_errno(status); | |
1298 | goto bail; | |
1299 | } | |
1300 | ||
1301 | status = ocfs2_local_alloc_new_window(osb, handle, ac); | |
1302 | if (status < 0) { | |
1303 | if (status != -ENOSPC) | |
1304 | mlog_errno(status); | |
1305 | goto bail; | |
1306 | } | |
1307 | ||
1308 | atomic_inc(&osb->alloc_stats.moves); | |
1309 | ||
ccd979bd MF |
1310 | bail: |
1311 | if (handle) | |
02dc1af4 | 1312 | ocfs2_commit_trans(osb, handle); |
ccd979bd | 1313 | |
a81cb88b | 1314 | brelse(main_bm_bh); |
ccd979bd | 1315 | |
72865d92 | 1316 | iput(main_bm_inode); |
d787ab09 | 1317 | kfree(alloc_copy); |
ccd979bd MF |
1318 | |
1319 | if (ac) | |
1320 | ocfs2_free_alloc_context(ac); | |
1321 | ||
c1e8d35e TM |
1322 | if (status) |
1323 | mlog_errno(status); | |
ccd979bd MF |
1324 | return status; |
1325 | } | |
1326 |