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4c8ff709 CY |
1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* | |
3 | * f2fs compress support | |
4 | * | |
5 | * Copyright (c) 2019 Chao Yu <chao@kernel.org> | |
6 | */ | |
7 | ||
8 | #include <linux/fs.h> | |
9 | #include <linux/f2fs_fs.h> | |
e41d12f5 | 10 | #include <linux/moduleparam.h> |
4c8ff709 CY |
11 | #include <linux/writeback.h> |
12 | #include <linux/backing-dev.h> | |
13 | #include <linux/lzo.h> | |
14 | #include <linux/lz4.h> | |
50cfa66f | 15 | #include <linux/zstd.h> |
6ce19aff | 16 | #include <linux/pagevec.h> |
4c8ff709 CY |
17 | |
18 | #include "f2fs.h" | |
19 | #include "node.h" | |
6ce19aff | 20 | #include "segment.h" |
4c8ff709 CY |
21 | #include <trace/events/f2fs.h> |
22 | ||
c68d6c88 CY |
23 | static struct kmem_cache *cic_entry_slab; |
24 | static struct kmem_cache *dic_entry_slab; | |
25 | ||
31083031 CY |
26 | static void *page_array_alloc(struct inode *inode, int nr) |
27 | { | |
28 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
29 | unsigned int size = sizeof(struct page *) * nr; | |
30 | ||
31 | if (likely(size <= sbi->page_array_slab_size)) | |
32410577 CY |
32 | return f2fs_kmem_cache_alloc(sbi->page_array_slab, |
33 | GFP_F2FS_ZERO, false, F2FS_I_SB(inode)); | |
31083031 CY |
34 | return f2fs_kzalloc(sbi, size, GFP_NOFS); |
35 | } | |
36 | ||
37 | static void page_array_free(struct inode *inode, void *pages, int nr) | |
38 | { | |
39 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
40 | unsigned int size = sizeof(struct page *) * nr; | |
41 | ||
42 | if (!pages) | |
43 | return; | |
44 | ||
45 | if (likely(size <= sbi->page_array_slab_size)) | |
46 | kmem_cache_free(sbi->page_array_slab, pages); | |
47 | else | |
48 | kfree(pages); | |
49 | } | |
50 | ||
4c8ff709 CY |
51 | struct f2fs_compress_ops { |
52 | int (*init_compress_ctx)(struct compress_ctx *cc); | |
53 | void (*destroy_compress_ctx)(struct compress_ctx *cc); | |
54 | int (*compress_pages)(struct compress_ctx *cc); | |
23b1faaa CY |
55 | int (*init_decompress_ctx)(struct decompress_io_ctx *dic); |
56 | void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic); | |
4c8ff709 CY |
57 | int (*decompress_pages)(struct decompress_io_ctx *dic); |
58 | }; | |
59 | ||
60 | static unsigned int offset_in_cluster(struct compress_ctx *cc, pgoff_t index) | |
61 | { | |
62 | return index & (cc->cluster_size - 1); | |
63 | } | |
64 | ||
65 | static pgoff_t cluster_idx(struct compress_ctx *cc, pgoff_t index) | |
66 | { | |
67 | return index >> cc->log_cluster_size; | |
68 | } | |
69 | ||
70 | static pgoff_t start_idx_of_cluster(struct compress_ctx *cc) | |
71 | { | |
72 | return cc->cluster_idx << cc->log_cluster_size; | |
73 | } | |
74 | ||
75 | bool f2fs_is_compressed_page(struct page *page) | |
76 | { | |
77 | if (!PagePrivate(page)) | |
78 | return false; | |
79 | if (!page_private(page)) | |
80 | return false; | |
b763f3be | 81 | if (page_private_nonpointer(page)) |
4c8ff709 | 82 | return false; |
29b993c7 | 83 | |
4c8ff709 CY |
84 | f2fs_bug_on(F2FS_M_SB(page->mapping), |
85 | *((u32 *)page_private(page)) != F2FS_COMPRESSED_PAGE_MAGIC); | |
86 | return true; | |
87 | } | |
88 | ||
89 | static void f2fs_set_compressed_page(struct page *page, | |
887347a0 | 90 | struct inode *inode, pgoff_t index, void *data) |
4c8ff709 | 91 | { |
b763f3be | 92 | attach_page_private(page, (void *)data); |
4c8ff709 CY |
93 | |
94 | /* i_crypto_info and iv index */ | |
95 | page->index = index; | |
96 | page->mapping = inode->i_mapping; | |
4c8ff709 CY |
97 | } |
98 | ||
4c8ff709 CY |
99 | static void f2fs_drop_rpages(struct compress_ctx *cc, int len, bool unlock) |
100 | { | |
101 | int i; | |
102 | ||
103 | for (i = 0; i < len; i++) { | |
104 | if (!cc->rpages[i]) | |
105 | continue; | |
106 | if (unlock) | |
107 | unlock_page(cc->rpages[i]); | |
108 | else | |
109 | put_page(cc->rpages[i]); | |
110 | } | |
111 | } | |
112 | ||
113 | static void f2fs_put_rpages(struct compress_ctx *cc) | |
114 | { | |
115 | f2fs_drop_rpages(cc, cc->cluster_size, false); | |
116 | } | |
117 | ||
118 | static void f2fs_unlock_rpages(struct compress_ctx *cc, int len) | |
119 | { | |
120 | f2fs_drop_rpages(cc, len, true); | |
121 | } | |
122 | ||
4c8ff709 CY |
123 | static void f2fs_put_rpages_wbc(struct compress_ctx *cc, |
124 | struct writeback_control *wbc, bool redirty, int unlock) | |
125 | { | |
126 | unsigned int i; | |
127 | ||
128 | for (i = 0; i < cc->cluster_size; i++) { | |
129 | if (!cc->rpages[i]) | |
130 | continue; | |
131 | if (redirty) | |
132 | redirty_page_for_writepage(wbc, cc->rpages[i]); | |
133 | f2fs_put_page(cc->rpages[i], unlock); | |
134 | } | |
135 | } | |
136 | ||
137 | struct page *f2fs_compress_control_page(struct page *page) | |
138 | { | |
139 | return ((struct compress_io_ctx *)page_private(page))->rpages[0]; | |
140 | } | |
141 | ||
142 | int f2fs_init_compress_ctx(struct compress_ctx *cc) | |
143 | { | |
adfc6943 | 144 | if (cc->rpages) |
4c8ff709 CY |
145 | return 0; |
146 | ||
31083031 | 147 | cc->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
4c8ff709 CY |
148 | return cc->rpages ? 0 : -ENOMEM; |
149 | } | |
150 | ||
8bfbfb0d | 151 | void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse) |
4c8ff709 | 152 | { |
31083031 | 153 | page_array_free(cc->inode, cc->rpages, cc->cluster_size); |
4c8ff709 CY |
154 | cc->rpages = NULL; |
155 | cc->nr_rpages = 0; | |
156 | cc->nr_cpages = 0; | |
3271d7eb | 157 | cc->valid_nr_cpages = 0; |
8bfbfb0d CY |
158 | if (!reuse) |
159 | cc->cluster_idx = NULL_CLUSTER; | |
4c8ff709 CY |
160 | } |
161 | ||
162 | void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page) | |
163 | { | |
164 | unsigned int cluster_ofs; | |
165 | ||
166 | if (!f2fs_cluster_can_merge_page(cc, page->index)) | |
167 | f2fs_bug_on(F2FS_I_SB(cc->inode), 1); | |
168 | ||
169 | cluster_ofs = offset_in_cluster(cc, page->index); | |
170 | cc->rpages[cluster_ofs] = page; | |
171 | cc->nr_rpages++; | |
172 | cc->cluster_idx = cluster_idx(cc, page->index); | |
173 | } | |
174 | ||
175 | #ifdef CONFIG_F2FS_FS_LZO | |
176 | static int lzo_init_compress_ctx(struct compress_ctx *cc) | |
177 | { | |
178 | cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), | |
179 | LZO1X_MEM_COMPRESS, GFP_NOFS); | |
180 | if (!cc->private) | |
181 | return -ENOMEM; | |
182 | ||
183 | cc->clen = lzo1x_worst_compress(PAGE_SIZE << cc->log_cluster_size); | |
184 | return 0; | |
185 | } | |
186 | ||
187 | static void lzo_destroy_compress_ctx(struct compress_ctx *cc) | |
188 | { | |
189 | kvfree(cc->private); | |
190 | cc->private = NULL; | |
191 | } | |
192 | ||
193 | static int lzo_compress_pages(struct compress_ctx *cc) | |
194 | { | |
195 | int ret; | |
196 | ||
197 | ret = lzo1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, | |
198 | &cc->clen, cc->private); | |
199 | if (ret != LZO_E_OK) { | |
200 | printk_ratelimited("%sF2FS-fs (%s): lzo compress failed, ret:%d\n", | |
201 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); | |
202 | return -EIO; | |
203 | } | |
204 | return 0; | |
205 | } | |
206 | ||
207 | static int lzo_decompress_pages(struct decompress_io_ctx *dic) | |
208 | { | |
209 | int ret; | |
210 | ||
211 | ret = lzo1x_decompress_safe(dic->cbuf->cdata, dic->clen, | |
212 | dic->rbuf, &dic->rlen); | |
213 | if (ret != LZO_E_OK) { | |
214 | printk_ratelimited("%sF2FS-fs (%s): lzo decompress failed, ret:%d\n", | |
215 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); | |
216 | return -EIO; | |
217 | } | |
218 | ||
219 | if (dic->rlen != PAGE_SIZE << dic->log_cluster_size) { | |
220 | printk_ratelimited("%sF2FS-fs (%s): lzo invalid rlen:%zu, " | |
221 | "expected:%lu\n", KERN_ERR, | |
222 | F2FS_I_SB(dic->inode)->sb->s_id, | |
223 | dic->rlen, | |
224 | PAGE_SIZE << dic->log_cluster_size); | |
225 | return -EIO; | |
226 | } | |
227 | return 0; | |
228 | } | |
229 | ||
230 | static const struct f2fs_compress_ops f2fs_lzo_ops = { | |
231 | .init_compress_ctx = lzo_init_compress_ctx, | |
232 | .destroy_compress_ctx = lzo_destroy_compress_ctx, | |
233 | .compress_pages = lzo_compress_pages, | |
234 | .decompress_pages = lzo_decompress_pages, | |
235 | }; | |
236 | #endif | |
237 | ||
238 | #ifdef CONFIG_F2FS_FS_LZ4 | |
239 | static int lz4_init_compress_ctx(struct compress_ctx *cc) | |
240 | { | |
3fde13f8 CY |
241 | unsigned int size = LZ4_MEM_COMPRESS; |
242 | ||
243 | #ifdef CONFIG_F2FS_FS_LZ4HC | |
244 | if (F2FS_I(cc->inode)->i_compress_flag >> COMPRESS_LEVEL_OFFSET) | |
245 | size = LZ4HC_MEM_COMPRESS; | |
246 | #endif | |
247 | ||
248 | cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), size, GFP_NOFS); | |
4c8ff709 CY |
249 | if (!cc->private) |
250 | return -ENOMEM; | |
251 | ||
f6644143 CY |
252 | /* |
253 | * we do not change cc->clen to LZ4_compressBound(inputsize) to | |
254 | * adapt worst compress case, because lz4 compressor can handle | |
255 | * output budget properly. | |
256 | */ | |
257 | cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; | |
4c8ff709 CY |
258 | return 0; |
259 | } | |
260 | ||
261 | static void lz4_destroy_compress_ctx(struct compress_ctx *cc) | |
262 | { | |
263 | kvfree(cc->private); | |
264 | cc->private = NULL; | |
265 | } | |
266 | ||
3fde13f8 CY |
267 | #ifdef CONFIG_F2FS_FS_LZ4HC |
268 | static int lz4hc_compress_pages(struct compress_ctx *cc) | |
269 | { | |
270 | unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> | |
271 | COMPRESS_LEVEL_OFFSET; | |
272 | int len; | |
273 | ||
274 | if (level) | |
275 | len = LZ4_compress_HC(cc->rbuf, cc->cbuf->cdata, cc->rlen, | |
276 | cc->clen, level, cc->private); | |
277 | else | |
278 | len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, | |
279 | cc->clen, cc->private); | |
280 | if (!len) | |
281 | return -EAGAIN; | |
282 | ||
283 | cc->clen = len; | |
284 | return 0; | |
285 | } | |
286 | #endif | |
287 | ||
4c8ff709 CY |
288 | static int lz4_compress_pages(struct compress_ctx *cc) |
289 | { | |
290 | int len; | |
291 | ||
3fde13f8 CY |
292 | #ifdef CONFIG_F2FS_FS_LZ4HC |
293 | return lz4hc_compress_pages(cc); | |
294 | #endif | |
4c8ff709 CY |
295 | len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, |
296 | cc->clen, cc->private); | |
f6644143 CY |
297 | if (!len) |
298 | return -EAGAIN; | |
299 | ||
4c8ff709 CY |
300 | cc->clen = len; |
301 | return 0; | |
302 | } | |
303 | ||
304 | static int lz4_decompress_pages(struct decompress_io_ctx *dic) | |
305 | { | |
306 | int ret; | |
307 | ||
308 | ret = LZ4_decompress_safe(dic->cbuf->cdata, dic->rbuf, | |
309 | dic->clen, dic->rlen); | |
310 | if (ret < 0) { | |
311 | printk_ratelimited("%sF2FS-fs (%s): lz4 decompress failed, ret:%d\n", | |
312 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); | |
313 | return -EIO; | |
314 | } | |
315 | ||
316 | if (ret != PAGE_SIZE << dic->log_cluster_size) { | |
d284af43 | 317 | printk_ratelimited("%sF2FS-fs (%s): lz4 invalid ret:%d, " |
4c8ff709 | 318 | "expected:%lu\n", KERN_ERR, |
d284af43 | 319 | F2FS_I_SB(dic->inode)->sb->s_id, ret, |
4c8ff709 CY |
320 | PAGE_SIZE << dic->log_cluster_size); |
321 | return -EIO; | |
322 | } | |
323 | return 0; | |
324 | } | |
325 | ||
326 | static const struct f2fs_compress_ops f2fs_lz4_ops = { | |
327 | .init_compress_ctx = lz4_init_compress_ctx, | |
328 | .destroy_compress_ctx = lz4_destroy_compress_ctx, | |
329 | .compress_pages = lz4_compress_pages, | |
330 | .decompress_pages = lz4_decompress_pages, | |
331 | }; | |
332 | #endif | |
333 | ||
50cfa66f CY |
334 | #ifdef CONFIG_F2FS_FS_ZSTD |
335 | #define F2FS_ZSTD_DEFAULT_CLEVEL 1 | |
336 | ||
337 | static int zstd_init_compress_ctx(struct compress_ctx *cc) | |
338 | { | |
cf30f6a5 NT |
339 | zstd_parameters params; |
340 | zstd_cstream *stream; | |
50cfa66f CY |
341 | void *workspace; |
342 | unsigned int workspace_size; | |
3fde13f8 CY |
343 | unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> |
344 | COMPRESS_LEVEL_OFFSET; | |
345 | ||
346 | if (!level) | |
347 | level = F2FS_ZSTD_DEFAULT_CLEVEL; | |
50cfa66f | 348 | |
cf30f6a5 NT |
349 | params = zstd_get_params(F2FS_ZSTD_DEFAULT_CLEVEL, cc->rlen); |
350 | workspace_size = zstd_cstream_workspace_bound(¶ms.cParams); | |
50cfa66f CY |
351 | |
352 | workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode), | |
353 | workspace_size, GFP_NOFS); | |
354 | if (!workspace) | |
355 | return -ENOMEM; | |
356 | ||
cf30f6a5 | 357 | stream = zstd_init_cstream(¶ms, 0, workspace, workspace_size); |
50cfa66f | 358 | if (!stream) { |
cf30f6a5 | 359 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_cstream failed\n", |
50cfa66f CY |
360 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
361 | __func__); | |
362 | kvfree(workspace); | |
363 | return -EIO; | |
364 | } | |
365 | ||
366 | cc->private = workspace; | |
367 | cc->private2 = stream; | |
368 | ||
369 | cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; | |
370 | return 0; | |
371 | } | |
372 | ||
373 | static void zstd_destroy_compress_ctx(struct compress_ctx *cc) | |
374 | { | |
375 | kvfree(cc->private); | |
376 | cc->private = NULL; | |
377 | cc->private2 = NULL; | |
378 | } | |
379 | ||
380 | static int zstd_compress_pages(struct compress_ctx *cc) | |
381 | { | |
cf30f6a5 NT |
382 | zstd_cstream *stream = cc->private2; |
383 | zstd_in_buffer inbuf; | |
384 | zstd_out_buffer outbuf; | |
50cfa66f CY |
385 | int src_size = cc->rlen; |
386 | int dst_size = src_size - PAGE_SIZE - COMPRESS_HEADER_SIZE; | |
387 | int ret; | |
388 | ||
389 | inbuf.pos = 0; | |
390 | inbuf.src = cc->rbuf; | |
391 | inbuf.size = src_size; | |
392 | ||
393 | outbuf.pos = 0; | |
394 | outbuf.dst = cc->cbuf->cdata; | |
395 | outbuf.size = dst_size; | |
396 | ||
cf30f6a5 NT |
397 | ret = zstd_compress_stream(stream, &outbuf, &inbuf); |
398 | if (zstd_is_error(ret)) { | |
399 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_compress_stream failed, ret: %d\n", | |
50cfa66f | 400 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
cf30f6a5 | 401 | __func__, zstd_get_error_code(ret)); |
50cfa66f CY |
402 | return -EIO; |
403 | } | |
404 | ||
cf30f6a5 NT |
405 | ret = zstd_end_stream(stream, &outbuf); |
406 | if (zstd_is_error(ret)) { | |
407 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_end_stream returned %d\n", | |
50cfa66f | 408 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
cf30f6a5 | 409 | __func__, zstd_get_error_code(ret)); |
50cfa66f CY |
410 | return -EIO; |
411 | } | |
412 | ||
1454c978 CY |
413 | /* |
414 | * there is compressed data remained in intermediate buffer due to | |
415 | * no more space in cbuf.cdata | |
416 | */ | |
417 | if (ret) | |
418 | return -EAGAIN; | |
419 | ||
50cfa66f CY |
420 | cc->clen = outbuf.pos; |
421 | return 0; | |
422 | } | |
423 | ||
424 | static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic) | |
425 | { | |
cf30f6a5 | 426 | zstd_dstream *stream; |
50cfa66f CY |
427 | void *workspace; |
428 | unsigned int workspace_size; | |
0e2b7385 CY |
429 | unsigned int max_window_size = |
430 | MAX_COMPRESS_WINDOW_SIZE(dic->log_cluster_size); | |
50cfa66f | 431 | |
cf30f6a5 | 432 | workspace_size = zstd_dstream_workspace_bound(max_window_size); |
50cfa66f CY |
433 | |
434 | workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode), | |
435 | workspace_size, GFP_NOFS); | |
436 | if (!workspace) | |
437 | return -ENOMEM; | |
438 | ||
cf30f6a5 | 439 | stream = zstd_init_dstream(max_window_size, workspace, workspace_size); |
50cfa66f | 440 | if (!stream) { |
cf30f6a5 | 441 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_dstream failed\n", |
50cfa66f CY |
442 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, |
443 | __func__); | |
444 | kvfree(workspace); | |
445 | return -EIO; | |
446 | } | |
447 | ||
448 | dic->private = workspace; | |
449 | dic->private2 = stream; | |
450 | ||
451 | return 0; | |
452 | } | |
453 | ||
454 | static void zstd_destroy_decompress_ctx(struct decompress_io_ctx *dic) | |
455 | { | |
456 | kvfree(dic->private); | |
457 | dic->private = NULL; | |
458 | dic->private2 = NULL; | |
459 | } | |
460 | ||
461 | static int zstd_decompress_pages(struct decompress_io_ctx *dic) | |
462 | { | |
cf30f6a5 NT |
463 | zstd_dstream *stream = dic->private2; |
464 | zstd_in_buffer inbuf; | |
465 | zstd_out_buffer outbuf; | |
50cfa66f CY |
466 | int ret; |
467 | ||
468 | inbuf.pos = 0; | |
469 | inbuf.src = dic->cbuf->cdata; | |
470 | inbuf.size = dic->clen; | |
471 | ||
472 | outbuf.pos = 0; | |
473 | outbuf.dst = dic->rbuf; | |
474 | outbuf.size = dic->rlen; | |
475 | ||
cf30f6a5 NT |
476 | ret = zstd_decompress_stream(stream, &outbuf, &inbuf); |
477 | if (zstd_is_error(ret)) { | |
478 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_decompress_stream failed, ret: %d\n", | |
50cfa66f | 479 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, |
cf30f6a5 | 480 | __func__, zstd_get_error_code(ret)); |
50cfa66f CY |
481 | return -EIO; |
482 | } | |
483 | ||
484 | if (dic->rlen != outbuf.pos) { | |
485 | printk_ratelimited("%sF2FS-fs (%s): %s ZSTD invalid rlen:%zu, " | |
486 | "expected:%lu\n", KERN_ERR, | |
487 | F2FS_I_SB(dic->inode)->sb->s_id, | |
488 | __func__, dic->rlen, | |
489 | PAGE_SIZE << dic->log_cluster_size); | |
490 | return -EIO; | |
491 | } | |
492 | ||
493 | return 0; | |
494 | } | |
495 | ||
496 | static const struct f2fs_compress_ops f2fs_zstd_ops = { | |
497 | .init_compress_ctx = zstd_init_compress_ctx, | |
498 | .destroy_compress_ctx = zstd_destroy_compress_ctx, | |
499 | .compress_pages = zstd_compress_pages, | |
500 | .init_decompress_ctx = zstd_init_decompress_ctx, | |
501 | .destroy_decompress_ctx = zstd_destroy_decompress_ctx, | |
502 | .decompress_pages = zstd_decompress_pages, | |
503 | }; | |
504 | #endif | |
505 | ||
6d92b201 CY |
506 | #ifdef CONFIG_F2FS_FS_LZO |
507 | #ifdef CONFIG_F2FS_FS_LZORLE | |
508 | static int lzorle_compress_pages(struct compress_ctx *cc) | |
509 | { | |
510 | int ret; | |
511 | ||
512 | ret = lzorle1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, | |
513 | &cc->clen, cc->private); | |
514 | if (ret != LZO_E_OK) { | |
515 | printk_ratelimited("%sF2FS-fs (%s): lzo-rle compress failed, ret:%d\n", | |
516 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); | |
517 | return -EIO; | |
518 | } | |
519 | return 0; | |
520 | } | |
521 | ||
522 | static const struct f2fs_compress_ops f2fs_lzorle_ops = { | |
523 | .init_compress_ctx = lzo_init_compress_ctx, | |
524 | .destroy_compress_ctx = lzo_destroy_compress_ctx, | |
525 | .compress_pages = lzorle_compress_pages, | |
526 | .decompress_pages = lzo_decompress_pages, | |
527 | }; | |
528 | #endif | |
529 | #endif | |
530 | ||
4c8ff709 CY |
531 | static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = { |
532 | #ifdef CONFIG_F2FS_FS_LZO | |
533 | &f2fs_lzo_ops, | |
534 | #else | |
535 | NULL, | |
536 | #endif | |
537 | #ifdef CONFIG_F2FS_FS_LZ4 | |
538 | &f2fs_lz4_ops, | |
539 | #else | |
540 | NULL, | |
541 | #endif | |
50cfa66f CY |
542 | #ifdef CONFIG_F2FS_FS_ZSTD |
543 | &f2fs_zstd_ops, | |
544 | #else | |
545 | NULL, | |
546 | #endif | |
6d92b201 CY |
547 | #if defined(CONFIG_F2FS_FS_LZO) && defined(CONFIG_F2FS_FS_LZORLE) |
548 | &f2fs_lzorle_ops, | |
549 | #else | |
550 | NULL, | |
551 | #endif | |
4c8ff709 CY |
552 | }; |
553 | ||
554 | bool f2fs_is_compress_backend_ready(struct inode *inode) | |
555 | { | |
556 | if (!f2fs_compressed_file(inode)) | |
557 | return true; | |
558 | return f2fs_cops[F2FS_I(inode)->i_compress_algorithm]; | |
559 | } | |
560 | ||
99bbe307 | 561 | static mempool_t *compress_page_pool; |
5e6bbde9 CY |
562 | static int num_compress_pages = 512; |
563 | module_param(num_compress_pages, uint, 0444); | |
564 | MODULE_PARM_DESC(num_compress_pages, | |
565 | "Number of intermediate compress pages to preallocate"); | |
566 | ||
567 | int f2fs_init_compress_mempool(void) | |
568 | { | |
569 | compress_page_pool = mempool_create_page_pool(num_compress_pages, 0); | |
570 | if (!compress_page_pool) | |
571 | return -ENOMEM; | |
572 | ||
573 | return 0; | |
574 | } | |
575 | ||
576 | void f2fs_destroy_compress_mempool(void) | |
577 | { | |
578 | mempool_destroy(compress_page_pool); | |
579 | } | |
580 | ||
581 | static struct page *f2fs_compress_alloc_page(void) | |
4c8ff709 CY |
582 | { |
583 | struct page *page; | |
584 | ||
5e6bbde9 | 585 | page = mempool_alloc(compress_page_pool, GFP_NOFS); |
4c8ff709 | 586 | lock_page(page); |
5e6bbde9 | 587 | |
4c8ff709 CY |
588 | return page; |
589 | } | |
590 | ||
5e6bbde9 CY |
591 | static void f2fs_compress_free_page(struct page *page) |
592 | { | |
593 | if (!page) | |
594 | return; | |
b763f3be | 595 | detach_page_private(page); |
5e6bbde9 CY |
596 | page->mapping = NULL; |
597 | unlock_page(page); | |
598 | mempool_free(page, compress_page_pool); | |
599 | } | |
600 | ||
6fcaebac DJ |
601 | #define MAX_VMAP_RETRIES 3 |
602 | ||
603 | static void *f2fs_vmap(struct page **pages, unsigned int count) | |
604 | { | |
605 | int i; | |
606 | void *buf = NULL; | |
607 | ||
608 | for (i = 0; i < MAX_VMAP_RETRIES; i++) { | |
609 | buf = vm_map_ram(pages, count, -1); | |
610 | if (buf) | |
611 | break; | |
612 | vm_unmap_aliases(); | |
613 | } | |
614 | return buf; | |
615 | } | |
616 | ||
4c8ff709 CY |
617 | static int f2fs_compress_pages(struct compress_ctx *cc) |
618 | { | |
4c8ff709 CY |
619 | struct f2fs_inode_info *fi = F2FS_I(cc->inode); |
620 | const struct f2fs_compress_ops *cops = | |
621 | f2fs_cops[fi->i_compress_algorithm]; | |
31083031 | 622 | unsigned int max_len, new_nr_cpages; |
b28f047b | 623 | u32 chksum = 0; |
4c8ff709 CY |
624 | int i, ret; |
625 | ||
626 | trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx, | |
627 | cc->cluster_size, fi->i_compress_algorithm); | |
628 | ||
23b1faaa CY |
629 | if (cops->init_compress_ctx) { |
630 | ret = cops->init_compress_ctx(cc); | |
631 | if (ret) | |
632 | goto out; | |
633 | } | |
4c8ff709 CY |
634 | |
635 | max_len = COMPRESS_HEADER_SIZE + cc->clen; | |
636 | cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE); | |
3271d7eb | 637 | cc->valid_nr_cpages = cc->nr_cpages; |
4c8ff709 | 638 | |
31083031 | 639 | cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages); |
4c8ff709 CY |
640 | if (!cc->cpages) { |
641 | ret = -ENOMEM; | |
642 | goto destroy_compress_ctx; | |
643 | } | |
644 | ||
645 | for (i = 0; i < cc->nr_cpages; i++) { | |
5e6bbde9 | 646 | cc->cpages[i] = f2fs_compress_alloc_page(); |
4c8ff709 CY |
647 | if (!cc->cpages[i]) { |
648 | ret = -ENOMEM; | |
649 | goto out_free_cpages; | |
650 | } | |
651 | } | |
652 | ||
6fcaebac | 653 | cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size); |
4c8ff709 CY |
654 | if (!cc->rbuf) { |
655 | ret = -ENOMEM; | |
656 | goto out_free_cpages; | |
657 | } | |
658 | ||
6fcaebac | 659 | cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages); |
4c8ff709 CY |
660 | if (!cc->cbuf) { |
661 | ret = -ENOMEM; | |
662 | goto out_vunmap_rbuf; | |
663 | } | |
664 | ||
665 | ret = cops->compress_pages(cc); | |
666 | if (ret) | |
667 | goto out_vunmap_cbuf; | |
668 | ||
669 | max_len = PAGE_SIZE * (cc->cluster_size - 1) - COMPRESS_HEADER_SIZE; | |
670 | ||
671 | if (cc->clen > max_len) { | |
672 | ret = -EAGAIN; | |
673 | goto out_vunmap_cbuf; | |
674 | } | |
675 | ||
676 | cc->cbuf->clen = cpu_to_le32(cc->clen); | |
4c8ff709 | 677 | |
b28f047b CY |
678 | if (fi->i_compress_flag & 1 << COMPRESS_CHKSUM) |
679 | chksum = f2fs_crc32(F2FS_I_SB(cc->inode), | |
680 | cc->cbuf->cdata, cc->clen); | |
681 | cc->cbuf->chksum = cpu_to_le32(chksum); | |
682 | ||
4c8ff709 CY |
683 | for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++) |
684 | cc->cbuf->reserved[i] = cpu_to_le32(0); | |
685 | ||
31083031 CY |
686 | new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE); |
687 | ||
7fa6d598 EB |
688 | /* zero out any unused part of the last page */ |
689 | memset(&cc->cbuf->cdata[cc->clen], 0, | |
31083031 CY |
690 | (new_nr_cpages * PAGE_SIZE) - |
691 | (cc->clen + COMPRESS_HEADER_SIZE)); | |
7fa6d598 | 692 | |
6fcaebac DJ |
693 | vm_unmap_ram(cc->cbuf, cc->nr_cpages); |
694 | vm_unmap_ram(cc->rbuf, cc->cluster_size); | |
4c8ff709 | 695 | |
31083031 | 696 | for (i = 0; i < cc->nr_cpages; i++) { |
3271d7eb | 697 | if (i < new_nr_cpages) |
31083031 | 698 | continue; |
5e6bbde9 | 699 | f2fs_compress_free_page(cc->cpages[i]); |
4c8ff709 CY |
700 | cc->cpages[i] = NULL; |
701 | } | |
702 | ||
23b1faaa CY |
703 | if (cops->destroy_compress_ctx) |
704 | cops->destroy_compress_ctx(cc); | |
09ff4801 | 705 | |
3271d7eb | 706 | cc->valid_nr_cpages = new_nr_cpages; |
4c8ff709 CY |
707 | |
708 | trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, | |
709 | cc->clen, ret); | |
710 | return 0; | |
711 | ||
712 | out_vunmap_cbuf: | |
6fcaebac | 713 | vm_unmap_ram(cc->cbuf, cc->nr_cpages); |
4c8ff709 | 714 | out_vunmap_rbuf: |
6fcaebac | 715 | vm_unmap_ram(cc->rbuf, cc->cluster_size); |
4c8ff709 CY |
716 | out_free_cpages: |
717 | for (i = 0; i < cc->nr_cpages; i++) { | |
718 | if (cc->cpages[i]) | |
5e6bbde9 | 719 | f2fs_compress_free_page(cc->cpages[i]); |
4c8ff709 | 720 | } |
31083031 | 721 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
4c8ff709 CY |
722 | cc->cpages = NULL; |
723 | destroy_compress_ctx: | |
23b1faaa CY |
724 | if (cops->destroy_compress_ctx) |
725 | cops->destroy_compress_ctx(cc); | |
4c8ff709 CY |
726 | out: |
727 | trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, | |
728 | cc->clen, ret); | |
729 | return ret; | |
730 | } | |
731 | ||
bff139b4 DJ |
732 | static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic, |
733 | bool pre_alloc); | |
734 | static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, | |
735 | bool bypass_destroy_callback, bool pre_alloc); | |
736 | ||
737 | void f2fs_decompress_cluster(struct decompress_io_ctx *dic, bool in_task) | |
4c8ff709 | 738 | { |
4c8ff709 | 739 | struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); |
7f59b277 | 740 | struct f2fs_inode_info *fi = F2FS_I(dic->inode); |
4c8ff709 CY |
741 | const struct f2fs_compress_ops *cops = |
742 | f2fs_cops[fi->i_compress_algorithm]; | |
bff139b4 | 743 | bool bypass_callback = false; |
4c8ff709 CY |
744 | int ret; |
745 | ||
4c8ff709 CY |
746 | trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx, |
747 | dic->cluster_size, fi->i_compress_algorithm); | |
748 | ||
4c8ff709 CY |
749 | if (dic->failed) { |
750 | ret = -EIO; | |
7f59b277 | 751 | goto out_end_io; |
4c8ff709 CY |
752 | } |
753 | ||
bff139b4 DJ |
754 | ret = f2fs_prepare_decomp_mem(dic, false); |
755 | if (ret) { | |
756 | bypass_callback = true; | |
757 | goto out_release; | |
4c8ff709 CY |
758 | } |
759 | ||
760 | dic->clen = le32_to_cpu(dic->cbuf->clen); | |
761 | dic->rlen = PAGE_SIZE << dic->log_cluster_size; | |
762 | ||
763 | if (dic->clen > PAGE_SIZE * dic->nr_cpages - COMPRESS_HEADER_SIZE) { | |
764 | ret = -EFSCORRUPTED; | |
bff139b4 | 765 | goto out_release; |
4c8ff709 CY |
766 | } |
767 | ||
768 | ret = cops->decompress_pages(dic); | |
769 | ||
75e91c88 | 770 | if (!ret && (fi->i_compress_flag & 1 << COMPRESS_CHKSUM)) { |
b28f047b CY |
771 | u32 provided = le32_to_cpu(dic->cbuf->chksum); |
772 | u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen); | |
773 | ||
774 | if (provided != calculated) { | |
775 | if (!is_inode_flag_set(dic->inode, FI_COMPRESS_CORRUPT)) { | |
776 | set_inode_flag(dic->inode, FI_COMPRESS_CORRUPT); | |
777 | printk_ratelimited( | |
778 | "%sF2FS-fs (%s): checksum invalid, nid = %lu, %x vs %x", | |
779 | KERN_INFO, sbi->sb->s_id, dic->inode->i_ino, | |
780 | provided, calculated); | |
781 | } | |
782 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
b28f047b CY |
783 | } |
784 | } | |
785 | ||
bff139b4 DJ |
786 | out_release: |
787 | f2fs_release_decomp_mem(dic, bypass_callback, false); | |
788 | ||
7f59b277 | 789 | out_end_io: |
4c8ff709 CY |
790 | trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx, |
791 | dic->clen, ret); | |
bff139b4 | 792 | f2fs_decompress_end_io(dic, ret, in_task); |
7f59b277 EB |
793 | } |
794 | ||
795 | /* | |
796 | * This is called when a page of a compressed cluster has been read from disk | |
797 | * (or failed to be read from disk). It checks whether this page was the last | |
798 | * page being waited on in the cluster, and if so, it decompresses the cluster | |
799 | * (or in the case of a failure, cleans up without actually decompressing). | |
800 | */ | |
6ce19aff | 801 | void f2fs_end_read_compressed_page(struct page *page, bool failed, |
bff139b4 | 802 | block_t blkaddr, bool in_task) |
7f59b277 EB |
803 | { |
804 | struct decompress_io_ctx *dic = | |
805 | (struct decompress_io_ctx *)page_private(page); | |
806 | struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); | |
807 | ||
808 | dec_page_count(sbi, F2FS_RD_DATA); | |
809 | ||
810 | if (failed) | |
811 | WRITE_ONCE(dic->failed, true); | |
bff139b4 | 812 | else if (blkaddr && in_task) |
6ce19aff CY |
813 | f2fs_cache_compressed_page(sbi, page, |
814 | dic->inode->i_ino, blkaddr); | |
7f59b277 EB |
815 | |
816 | if (atomic_dec_and_test(&dic->remaining_pages)) | |
bff139b4 | 817 | f2fs_decompress_cluster(dic, in_task); |
4c8ff709 CY |
818 | } |
819 | ||
820 | static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) | |
821 | { | |
822 | if (cc->cluster_idx == NULL_CLUSTER) | |
823 | return true; | |
824 | return cc->cluster_idx == cluster_idx(cc, index); | |
825 | } | |
826 | ||
827 | bool f2fs_cluster_is_empty(struct compress_ctx *cc) | |
828 | { | |
829 | return cc->nr_rpages == 0; | |
830 | } | |
831 | ||
832 | static bool f2fs_cluster_is_full(struct compress_ctx *cc) | |
833 | { | |
834 | return cc->cluster_size == cc->nr_rpages; | |
835 | } | |
836 | ||
837 | bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index) | |
838 | { | |
839 | if (f2fs_cluster_is_empty(cc)) | |
840 | return true; | |
841 | return is_page_in_cluster(cc, index); | |
842 | } | |
843 | ||
01fc4b9a | 844 | bool f2fs_all_cluster_page_ready(struct compress_ctx *cc, struct page **pages, |
4f8219f8 | 845 | int index, int nr_pages, bool uptodate) |
b368cc5e | 846 | { |
01fc4b9a | 847 | unsigned long pgidx = pages[index]->index; |
4f8219f8 | 848 | int i = uptodate ? 0 : 1; |
b368cc5e | 849 | |
4f8219f8 FC |
850 | /* |
851 | * when uptodate set to true, try to check all pages in cluster is | |
852 | * uptodate or not. | |
853 | */ | |
854 | if (uptodate && (pgidx % cc->cluster_size)) | |
b368cc5e FC |
855 | return false; |
856 | ||
4f8219f8 FC |
857 | if (nr_pages - index < cc->cluster_size) |
858 | return false; | |
b368cc5e | 859 | |
4f8219f8 | 860 | for (; i < cc->cluster_size; i++) { |
01fc4b9a | 861 | if (pages[index + i]->index != pgidx + i) |
b368cc5e | 862 | return false; |
01fc4b9a | 863 | if (uptodate && !PageUptodate(pages[index + i])) |
b368cc5e FC |
864 | return false; |
865 | } | |
866 | ||
867 | return true; | |
868 | } | |
869 | ||
5db479f0 | 870 | static bool cluster_has_invalid_data(struct compress_ctx *cc) |
4c8ff709 | 871 | { |
4c8ff709 CY |
872 | loff_t i_size = i_size_read(cc->inode); |
873 | unsigned nr_pages = DIV_ROUND_UP(i_size, PAGE_SIZE); | |
874 | int i; | |
875 | ||
876 | for (i = 0; i < cc->cluster_size; i++) { | |
877 | struct page *page = cc->rpages[i]; | |
878 | ||
8af85f71 | 879 | f2fs_bug_on(F2FS_I_SB(cc->inode), !page); |
4c8ff709 CY |
880 | |
881 | /* beyond EOF */ | |
882 | if (page->index >= nr_pages) | |
5db479f0 | 883 | return true; |
4c8ff709 | 884 | } |
5db479f0 | 885 | return false; |
4c8ff709 CY |
886 | } |
887 | ||
bbe1da7e CY |
888 | bool f2fs_sanity_check_cluster(struct dnode_of_data *dn) |
889 | { | |
890 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); | |
891 | unsigned int cluster_size = F2FS_I(dn->inode)->i_cluster_size; | |
892 | bool compressed = dn->data_blkaddr == COMPRESS_ADDR; | |
893 | int cluster_end = 0; | |
894 | int i; | |
895 | char *reason = ""; | |
896 | ||
897 | if (!compressed) | |
898 | return false; | |
899 | ||
900 | /* [..., COMPR_ADDR, ...] */ | |
901 | if (dn->ofs_in_node % cluster_size) { | |
902 | reason = "[*|C|*|*]"; | |
903 | goto out; | |
904 | } | |
905 | ||
906 | for (i = 1; i < cluster_size; i++) { | |
907 | block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, | |
908 | dn->ofs_in_node + i); | |
909 | ||
910 | /* [COMPR_ADDR, ..., COMPR_ADDR] */ | |
911 | if (blkaddr == COMPRESS_ADDR) { | |
912 | reason = "[C|*|C|*]"; | |
913 | goto out; | |
914 | } | |
915 | if (compressed) { | |
916 | if (!__is_valid_data_blkaddr(blkaddr)) { | |
917 | if (!cluster_end) | |
918 | cluster_end = i; | |
919 | continue; | |
920 | } | |
921 | /* [COMPR_ADDR, NULL_ADDR or NEW_ADDR, valid_blkaddr] */ | |
922 | if (cluster_end) { | |
923 | reason = "[C|N|N|V]"; | |
924 | goto out; | |
925 | } | |
926 | } | |
927 | } | |
928 | return false; | |
929 | out: | |
930 | f2fs_warn(sbi, "access invalid cluster, ino:%lu, nid:%u, ofs_in_node:%u, reason:%s", | |
931 | dn->inode->i_ino, dn->nid, dn->ofs_in_node, reason); | |
932 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
933 | return true; | |
934 | } | |
935 | ||
91f0fb69 CY |
936 | static int __f2fs_cluster_blocks(struct inode *inode, |
937 | unsigned int cluster_idx, bool compr) | |
4c8ff709 CY |
938 | { |
939 | struct dnode_of_data dn; | |
91f0fb69 CY |
940 | unsigned int cluster_size = F2FS_I(inode)->i_cluster_size; |
941 | unsigned int start_idx = cluster_idx << | |
942 | F2FS_I(inode)->i_log_cluster_size; | |
4c8ff709 CY |
943 | int ret; |
944 | ||
91f0fb69 CY |
945 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
946 | ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); | |
4c8ff709 CY |
947 | if (ret) { |
948 | if (ret == -ENOENT) | |
949 | ret = 0; | |
950 | goto fail; | |
951 | } | |
952 | ||
bbe1da7e CY |
953 | if (f2fs_sanity_check_cluster(&dn)) { |
954 | ret = -EFSCORRUPTED; | |
955 | goto fail; | |
956 | } | |
957 | ||
4c8ff709 CY |
958 | if (dn.data_blkaddr == COMPRESS_ADDR) { |
959 | int i; | |
960 | ||
961 | ret = 1; | |
91f0fb69 | 962 | for (i = 1; i < cluster_size; i++) { |
4c8ff709 CY |
963 | block_t blkaddr; |
964 | ||
a2ced1ce | 965 | blkaddr = data_blkaddr(dn.inode, |
4c8ff709 | 966 | dn.node_page, dn.ofs_in_node + i); |
1a67cbe1 CY |
967 | if (compr) { |
968 | if (__is_valid_data_blkaddr(blkaddr)) | |
969 | ret++; | |
970 | } else { | |
971 | if (blkaddr != NULL_ADDR) | |
972 | ret++; | |
973 | } | |
4c8ff709 | 974 | } |
8f1d4983 CY |
975 | |
976 | f2fs_bug_on(F2FS_I_SB(inode), | |
c6140415 JK |
977 | !compr && ret != cluster_size && |
978 | !is_inode_flag_set(inode, FI_COMPRESS_RELEASED)); | |
4c8ff709 CY |
979 | } |
980 | fail: | |
981 | f2fs_put_dnode(&dn); | |
982 | return ret; | |
983 | } | |
984 | ||
1a67cbe1 CY |
985 | /* return # of compressed blocks in compressed cluster */ |
986 | static int f2fs_compressed_blocks(struct compress_ctx *cc) | |
987 | { | |
91f0fb69 | 988 | return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true); |
1a67cbe1 CY |
989 | } |
990 | ||
991 | /* return # of valid blocks in compressed cluster */ | |
4c8ff709 CY |
992 | int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index) |
993 | { | |
91f0fb69 CY |
994 | return __f2fs_cluster_blocks(inode, |
995 | index >> F2FS_I(inode)->i_log_cluster_size, | |
996 | false); | |
4c8ff709 CY |
997 | } |
998 | ||
999 | static bool cluster_may_compress(struct compress_ctx *cc) | |
1000 | { | |
602a16d5 | 1001 | if (!f2fs_need_compress_data(cc->inode)) |
4c8ff709 CY |
1002 | return false; |
1003 | if (f2fs_is_atomic_file(cc->inode)) | |
1004 | return false; | |
4c8ff709 CY |
1005 | if (!f2fs_cluster_is_full(cc)) |
1006 | return false; | |
dc35d73a CY |
1007 | if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode)))) |
1008 | return false; | |
5db479f0 | 1009 | return !cluster_has_invalid_data(cc); |
4c8ff709 CY |
1010 | } |
1011 | ||
1012 | static void set_cluster_writeback(struct compress_ctx *cc) | |
1013 | { | |
1014 | int i; | |
1015 | ||
1016 | for (i = 0; i < cc->cluster_size; i++) { | |
1017 | if (cc->rpages[i]) | |
1018 | set_page_writeback(cc->rpages[i]); | |
1019 | } | |
1020 | } | |
1021 | ||
1022 | static void set_cluster_dirty(struct compress_ctx *cc) | |
1023 | { | |
1024 | int i; | |
1025 | ||
1026 | for (i = 0; i < cc->cluster_size; i++) | |
1027 | if (cc->rpages[i]) | |
1028 | set_page_dirty(cc->rpages[i]); | |
1029 | } | |
1030 | ||
1031 | static int prepare_compress_overwrite(struct compress_ctx *cc, | |
1032 | struct page **pagep, pgoff_t index, void **fsdata) | |
1033 | { | |
1034 | struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); | |
1035 | struct address_space *mapping = cc->inode->i_mapping; | |
1036 | struct page *page; | |
4c8ff709 CY |
1037 | sector_t last_block_in_bio; |
1038 | unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; | |
1039 | pgoff_t start_idx = start_idx_of_cluster(cc); | |
1040 | int i, ret; | |
4c8ff709 CY |
1041 | |
1042 | retry: | |
91f0fb69 | 1043 | ret = f2fs_is_compressed_cluster(cc->inode, start_idx); |
4c8ff709 CY |
1044 | if (ret <= 0) |
1045 | return ret; | |
1046 | ||
4c8ff709 CY |
1047 | ret = f2fs_init_compress_ctx(cc); |
1048 | if (ret) | |
1049 | return ret; | |
1050 | ||
1051 | /* keep page reference to avoid page reclaim */ | |
1052 | for (i = 0; i < cc->cluster_size; i++) { | |
1053 | page = f2fs_pagecache_get_page(mapping, start_idx + i, | |
1054 | fgp_flag, GFP_NOFS); | |
1055 | if (!page) { | |
1056 | ret = -ENOMEM; | |
1057 | goto unlock_pages; | |
1058 | } | |
1059 | ||
1060 | if (PageUptodate(page)) | |
a949dc5f | 1061 | f2fs_put_page(page, 1); |
4c8ff709 CY |
1062 | else |
1063 | f2fs_compress_ctx_add_page(cc, page); | |
1064 | } | |
1065 | ||
1066 | if (!f2fs_cluster_is_empty(cc)) { | |
1067 | struct bio *bio = NULL; | |
1068 | ||
1069 | ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size, | |
0683728a | 1070 | &last_block_in_bio, false, true); |
a949dc5f | 1071 | f2fs_put_rpages(cc); |
8bfbfb0d | 1072 | f2fs_destroy_compress_ctx(cc, true); |
4c8ff709 | 1073 | if (ret) |
a949dc5f | 1074 | goto out; |
4c8ff709 CY |
1075 | if (bio) |
1076 | f2fs_submit_bio(sbi, bio, DATA); | |
1077 | ||
1078 | ret = f2fs_init_compress_ctx(cc); | |
1079 | if (ret) | |
a949dc5f | 1080 | goto out; |
4c8ff709 CY |
1081 | } |
1082 | ||
1083 | for (i = 0; i < cc->cluster_size; i++) { | |
1084 | f2fs_bug_on(sbi, cc->rpages[i]); | |
1085 | ||
1086 | page = find_lock_page(mapping, start_idx + i); | |
a949dc5f CY |
1087 | if (!page) { |
1088 | /* page can be truncated */ | |
1089 | goto release_and_retry; | |
1090 | } | |
4c8ff709 CY |
1091 | |
1092 | f2fs_wait_on_page_writeback(page, DATA, true, true); | |
4c8ff709 | 1093 | f2fs_compress_ctx_add_page(cc, page); |
4c8ff709 CY |
1094 | |
1095 | if (!PageUptodate(page)) { | |
a949dc5f CY |
1096 | release_and_retry: |
1097 | f2fs_put_rpages(cc); | |
4c8ff709 | 1098 | f2fs_unlock_rpages(cc, i + 1); |
8bfbfb0d | 1099 | f2fs_destroy_compress_ctx(cc, true); |
4c8ff709 CY |
1100 | goto retry; |
1101 | } | |
1102 | } | |
1103 | ||
4c8ff709 CY |
1104 | if (likely(!ret)) { |
1105 | *fsdata = cc->rpages; | |
1106 | *pagep = cc->rpages[offset_in_cluster(cc, index)]; | |
1107 | return cc->cluster_size; | |
1108 | } | |
1109 | ||
1110 | unlock_pages: | |
a949dc5f | 1111 | f2fs_put_rpages(cc); |
4c8ff709 | 1112 | f2fs_unlock_rpages(cc, i); |
8bfbfb0d | 1113 | f2fs_destroy_compress_ctx(cc, true); |
a949dc5f | 1114 | out: |
4c8ff709 CY |
1115 | return ret; |
1116 | } | |
1117 | ||
1118 | int f2fs_prepare_compress_overwrite(struct inode *inode, | |
1119 | struct page **pagep, pgoff_t index, void **fsdata) | |
1120 | { | |
1121 | struct compress_ctx cc = { | |
1122 | .inode = inode, | |
1123 | .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, | |
1124 | .cluster_size = F2FS_I(inode)->i_cluster_size, | |
1125 | .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size, | |
1126 | .rpages = NULL, | |
1127 | .nr_rpages = 0, | |
1128 | }; | |
1129 | ||
1130 | return prepare_compress_overwrite(&cc, pagep, index, fsdata); | |
1131 | } | |
1132 | ||
1133 | bool f2fs_compress_write_end(struct inode *inode, void *fsdata, | |
1134 | pgoff_t index, unsigned copied) | |
1135 | ||
1136 | { | |
1137 | struct compress_ctx cc = { | |
31083031 | 1138 | .inode = inode, |
4c8ff709 CY |
1139 | .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, |
1140 | .cluster_size = F2FS_I(inode)->i_cluster_size, | |
1141 | .rpages = fsdata, | |
1142 | }; | |
1143 | bool first_index = (index == cc.rpages[0]->index); | |
1144 | ||
1145 | if (copied) | |
1146 | set_cluster_dirty(&cc); | |
1147 | ||
1148 | f2fs_put_rpages_wbc(&cc, NULL, false, 1); | |
8bfbfb0d | 1149 | f2fs_destroy_compress_ctx(&cc, false); |
4c8ff709 CY |
1150 | |
1151 | return first_index; | |
1152 | } | |
1153 | ||
3265d3db CY |
1154 | int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock) |
1155 | { | |
1156 | void *fsdata = NULL; | |
1157 | struct page *pagep; | |
1158 | int log_cluster_size = F2FS_I(inode)->i_log_cluster_size; | |
1159 | pgoff_t start_idx = from >> (PAGE_SHIFT + log_cluster_size) << | |
1160 | log_cluster_size; | |
1161 | int err; | |
1162 | ||
1163 | err = f2fs_is_compressed_cluster(inode, start_idx); | |
1164 | if (err < 0) | |
1165 | return err; | |
1166 | ||
1167 | /* truncate normal cluster */ | |
1168 | if (!err) | |
1169 | return f2fs_do_truncate_blocks(inode, from, lock); | |
1170 | ||
1171 | /* truncate compressed cluster */ | |
1172 | err = f2fs_prepare_compress_overwrite(inode, &pagep, | |
1173 | start_idx, &fsdata); | |
1174 | ||
1175 | /* should not be a normal cluster */ | |
1176 | f2fs_bug_on(F2FS_I_SB(inode), err == 0); | |
1177 | ||
1178 | if (err <= 0) | |
1179 | return err; | |
1180 | ||
1181 | if (err > 0) { | |
1182 | struct page **rpages = fsdata; | |
1183 | int cluster_size = F2FS_I(inode)->i_cluster_size; | |
1184 | int i; | |
1185 | ||
1186 | for (i = cluster_size - 1; i >= 0; i--) { | |
1187 | loff_t start = rpages[i]->index << PAGE_SHIFT; | |
1188 | ||
1189 | if (from <= start) { | |
1190 | zero_user_segment(rpages[i], 0, PAGE_SIZE); | |
1191 | } else { | |
1192 | zero_user_segment(rpages[i], from - start, | |
1193 | PAGE_SIZE); | |
1194 | break; | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | f2fs_compress_write_end(inode, fsdata, start_idx, true); | |
1199 | } | |
1200 | return 0; | |
1201 | } | |
1202 | ||
4c8ff709 CY |
1203 | static int f2fs_write_compressed_pages(struct compress_ctx *cc, |
1204 | int *submitted, | |
1205 | struct writeback_control *wbc, | |
1206 | enum iostat_type io_type) | |
1207 | { | |
1208 | struct inode *inode = cc->inode; | |
1209 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1210 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
1211 | struct f2fs_io_info fio = { | |
1212 | .sbi = sbi, | |
1213 | .ino = cc->inode->i_ino, | |
1214 | .type = DATA, | |
1215 | .op = REQ_OP_WRITE, | |
1216 | .op_flags = wbc_to_write_flags(wbc), | |
1217 | .old_blkaddr = NEW_ADDR, | |
1218 | .page = NULL, | |
1219 | .encrypted_page = NULL, | |
1220 | .compressed_page = NULL, | |
1221 | .submitted = false, | |
4c8ff709 CY |
1222 | .io_type = io_type, |
1223 | .io_wbc = wbc, | |
27aacd28 | 1224 | .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode), |
4c8ff709 CY |
1225 | }; |
1226 | struct dnode_of_data dn; | |
1227 | struct node_info ni; | |
1228 | struct compress_io_ctx *cic; | |
1229 | pgoff_t start_idx = start_idx_of_cluster(cc); | |
1230 | unsigned int last_index = cc->cluster_size - 1; | |
1231 | loff_t psize; | |
1232 | int i, err; | |
1233 | ||
ee68d271 CY |
1234 | /* we should bypass data pages to proceed the kworkder jobs */ |
1235 | if (unlikely(f2fs_cp_error(sbi))) { | |
1236 | mapping_set_error(cc->rpages[0]->mapping, -EIO); | |
1237 | goto out_free; | |
1238 | } | |
1239 | ||
79963d96 CY |
1240 | if (IS_NOQUOTA(inode)) { |
1241 | /* | |
1242 | * We need to wait for node_write to avoid block allocation during | |
1243 | * checkpoint. This can only happen to quota writes which can cause | |
1244 | * the below discard race condition. | |
1245 | */ | |
e4544b63 | 1246 | f2fs_down_read(&sbi->node_write); |
79963d96 | 1247 | } else if (!f2fs_trylock_op(sbi)) { |
31083031 | 1248 | goto out_free; |
79963d96 | 1249 | } |
4c8ff709 | 1250 | |
df77fbd8 | 1251 | set_new_dnode(&dn, cc->inode, NULL, NULL, 0); |
4c8ff709 CY |
1252 | |
1253 | err = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); | |
1254 | if (err) | |
1255 | goto out_unlock_op; | |
1256 | ||
1257 | for (i = 0; i < cc->cluster_size; i++) { | |
a2ced1ce | 1258 | if (data_blkaddr(dn.inode, dn.node_page, |
4c8ff709 CY |
1259 | dn.ofs_in_node + i) == NULL_ADDR) |
1260 | goto out_put_dnode; | |
1261 | } | |
1262 | ||
1263 | psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT; | |
1264 | ||
a9419b63 | 1265 | err = f2fs_get_node_info(fio.sbi, dn.nid, &ni, false); |
4c8ff709 CY |
1266 | if (err) |
1267 | goto out_put_dnode; | |
1268 | ||
1269 | fio.version = ni.version; | |
1270 | ||
32410577 | 1271 | cic = f2fs_kmem_cache_alloc(cic_entry_slab, GFP_F2FS_ZERO, false, sbi); |
4c8ff709 CY |
1272 | if (!cic) |
1273 | goto out_put_dnode; | |
1274 | ||
1275 | cic->magic = F2FS_COMPRESSED_PAGE_MAGIC; | |
1276 | cic->inode = inode; | |
3271d7eb | 1277 | atomic_set(&cic->pending_pages, cc->valid_nr_cpages); |
31083031 | 1278 | cic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
4c8ff709 CY |
1279 | if (!cic->rpages) |
1280 | goto out_put_cic; | |
1281 | ||
1282 | cic->nr_rpages = cc->cluster_size; | |
1283 | ||
3271d7eb | 1284 | for (i = 0; i < cc->valid_nr_cpages; i++) { |
4c8ff709 | 1285 | f2fs_set_compressed_page(cc->cpages[i], inode, |
887347a0 | 1286 | cc->rpages[i + 1]->index, cic); |
4c8ff709 | 1287 | fio.compressed_page = cc->cpages[i]; |
f567adb0 CY |
1288 | |
1289 | fio.old_blkaddr = data_blkaddr(dn.inode, dn.node_page, | |
1290 | dn.ofs_in_node + i + 1); | |
1291 | ||
1292 | /* wait for GCed page writeback via META_MAPPING */ | |
1293 | f2fs_wait_on_block_writeback(inode, fio.old_blkaddr); | |
1294 | ||
4c8ff709 CY |
1295 | if (fio.encrypted) { |
1296 | fio.page = cc->rpages[i + 1]; | |
1297 | err = f2fs_encrypt_one_page(&fio); | |
1298 | if (err) | |
1299 | goto out_destroy_crypt; | |
1300 | cc->cpages[i] = fio.encrypted_page; | |
1301 | } | |
1302 | } | |
1303 | ||
1304 | set_cluster_writeback(cc); | |
1305 | ||
1306 | for (i = 0; i < cc->cluster_size; i++) | |
1307 | cic->rpages[i] = cc->rpages[i]; | |
1308 | ||
1309 | for (i = 0; i < cc->cluster_size; i++, dn.ofs_in_node++) { | |
1310 | block_t blkaddr; | |
1311 | ||
a2ced1ce | 1312 | blkaddr = f2fs_data_blkaddr(&dn); |
95978caa | 1313 | fio.page = cc->rpages[i]; |
4c8ff709 CY |
1314 | fio.old_blkaddr = blkaddr; |
1315 | ||
1316 | /* cluster header */ | |
1317 | if (i == 0) { | |
1318 | if (blkaddr == COMPRESS_ADDR) | |
1319 | fio.compr_blocks++; | |
1320 | if (__is_valid_data_blkaddr(blkaddr)) | |
1321 | f2fs_invalidate_blocks(sbi, blkaddr); | |
1322 | f2fs_update_data_blkaddr(&dn, COMPRESS_ADDR); | |
1323 | goto unlock_continue; | |
1324 | } | |
1325 | ||
1326 | if (fio.compr_blocks && __is_valid_data_blkaddr(blkaddr)) | |
1327 | fio.compr_blocks++; | |
1328 | ||
3271d7eb | 1329 | if (i > cc->valid_nr_cpages) { |
4c8ff709 CY |
1330 | if (__is_valid_data_blkaddr(blkaddr)) { |
1331 | f2fs_invalidate_blocks(sbi, blkaddr); | |
1332 | f2fs_update_data_blkaddr(&dn, NEW_ADDR); | |
1333 | } | |
1334 | goto unlock_continue; | |
1335 | } | |
1336 | ||
1337 | f2fs_bug_on(fio.sbi, blkaddr == NULL_ADDR); | |
1338 | ||
1339 | if (fio.encrypted) | |
1340 | fio.encrypted_page = cc->cpages[i - 1]; | |
1341 | else | |
1342 | fio.compressed_page = cc->cpages[i - 1]; | |
1343 | ||
1344 | cc->cpages[i - 1] = NULL; | |
1345 | f2fs_outplace_write_data(&dn, &fio); | |
1346 | (*submitted)++; | |
1347 | unlock_continue: | |
1348 | inode_dec_dirty_pages(cc->inode); | |
1349 | unlock_page(fio.page); | |
1350 | } | |
1351 | ||
1352 | if (fio.compr_blocks) | |
1353 | f2fs_i_compr_blocks_update(inode, fio.compr_blocks - 1, false); | |
3271d7eb FC |
1354 | f2fs_i_compr_blocks_update(inode, cc->valid_nr_cpages, true); |
1355 | add_compr_block_stat(inode, cc->valid_nr_cpages); | |
4c8ff709 CY |
1356 | |
1357 | set_inode_flag(cc->inode, FI_APPEND_WRITE); | |
1358 | if (cc->cluster_idx == 0) | |
1359 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); | |
1360 | ||
1361 | f2fs_put_dnode(&dn); | |
79963d96 | 1362 | if (IS_NOQUOTA(inode)) |
e4544b63 | 1363 | f2fs_up_read(&sbi->node_write); |
79963d96 | 1364 | else |
435cbab9 | 1365 | f2fs_unlock_op(sbi); |
4c8ff709 | 1366 | |
c10c9820 | 1367 | spin_lock(&fi->i_size_lock); |
4c8ff709 CY |
1368 | if (fi->last_disk_size < psize) |
1369 | fi->last_disk_size = psize; | |
c10c9820 | 1370 | spin_unlock(&fi->i_size_lock); |
4c8ff709 CY |
1371 | |
1372 | f2fs_put_rpages(cc); | |
31083031 CY |
1373 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
1374 | cc->cpages = NULL; | |
8bfbfb0d | 1375 | f2fs_destroy_compress_ctx(cc, false); |
4c8ff709 CY |
1376 | return 0; |
1377 | ||
1378 | out_destroy_crypt: | |
31083031 | 1379 | page_array_free(cc->inode, cic->rpages, cc->cluster_size); |
4c8ff709 CY |
1380 | |
1381 | for (--i; i >= 0; i--) | |
1382 | fscrypt_finalize_bounce_page(&cc->cpages[i]); | |
4c8ff709 | 1383 | out_put_cic: |
c68d6c88 | 1384 | kmem_cache_free(cic_entry_slab, cic); |
4c8ff709 CY |
1385 | out_put_dnode: |
1386 | f2fs_put_dnode(&dn); | |
1387 | out_unlock_op: | |
79963d96 | 1388 | if (IS_NOQUOTA(inode)) |
e4544b63 | 1389 | f2fs_up_read(&sbi->node_write); |
79963d96 | 1390 | else |
435cbab9 | 1391 | f2fs_unlock_op(sbi); |
31083031 | 1392 | out_free: |
3271d7eb | 1393 | for (i = 0; i < cc->valid_nr_cpages; i++) { |
827f0284 JK |
1394 | f2fs_compress_free_page(cc->cpages[i]); |
1395 | cc->cpages[i] = NULL; | |
1396 | } | |
31083031 CY |
1397 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
1398 | cc->cpages = NULL; | |
4c8ff709 CY |
1399 | return -EAGAIN; |
1400 | } | |
1401 | ||
1402 | void f2fs_compress_write_end_io(struct bio *bio, struct page *page) | |
1403 | { | |
1404 | struct f2fs_sb_info *sbi = bio->bi_private; | |
1405 | struct compress_io_ctx *cic = | |
1406 | (struct compress_io_ctx *)page_private(page); | |
1407 | int i; | |
1408 | ||
1409 | if (unlikely(bio->bi_status)) | |
1410 | mapping_set_error(cic->inode->i_mapping, -EIO); | |
1411 | ||
5e6bbde9 | 1412 | f2fs_compress_free_page(page); |
4c8ff709 CY |
1413 | |
1414 | dec_page_count(sbi, F2FS_WB_DATA); | |
1415 | ||
e6c3948d | 1416 | if (atomic_dec_return(&cic->pending_pages)) |
4c8ff709 CY |
1417 | return; |
1418 | ||
1419 | for (i = 0; i < cic->nr_rpages; i++) { | |
1420 | WARN_ON(!cic->rpages[i]); | |
b763f3be | 1421 | clear_page_private_gcing(cic->rpages[i]); |
4c8ff709 CY |
1422 | end_page_writeback(cic->rpages[i]); |
1423 | } | |
1424 | ||
31083031 | 1425 | page_array_free(cic->inode, cic->rpages, cic->nr_rpages); |
c68d6c88 | 1426 | kmem_cache_free(cic_entry_slab, cic); |
4c8ff709 CY |
1427 | } |
1428 | ||
1429 | static int f2fs_write_raw_pages(struct compress_ctx *cc, | |
1430 | int *submitted, | |
1431 | struct writeback_control *wbc, | |
1432 | enum iostat_type io_type) | |
1433 | { | |
1434 | struct address_space *mapping = cc->inode->i_mapping; | |
7377e853 | 1435 | int _submitted, compr_blocks, ret, i; |
4c8ff709 CY |
1436 | |
1437 | compr_blocks = f2fs_compressed_blocks(cc); | |
7377e853 HJK |
1438 | |
1439 | for (i = 0; i < cc->cluster_size; i++) { | |
1440 | if (!cc->rpages[i]) | |
1441 | continue; | |
1442 | ||
1443 | redirty_page_for_writepage(wbc, cc->rpages[i]); | |
1444 | unlock_page(cc->rpages[i]); | |
4c8ff709 CY |
1445 | } |
1446 | ||
7377e853 HJK |
1447 | if (compr_blocks < 0) |
1448 | return compr_blocks; | |
1449 | ||
4c8ff709 CY |
1450 | for (i = 0; i < cc->cluster_size; i++) { |
1451 | if (!cc->rpages[i]) | |
1452 | continue; | |
1453 | retry_write: | |
7377e853 HJK |
1454 | lock_page(cc->rpages[i]); |
1455 | ||
4c8ff709 | 1456 | if (cc->rpages[i]->mapping != mapping) { |
7377e853 | 1457 | continue_unlock: |
4c8ff709 CY |
1458 | unlock_page(cc->rpages[i]); |
1459 | continue; | |
1460 | } | |
1461 | ||
7377e853 HJK |
1462 | if (!PageDirty(cc->rpages[i])) |
1463 | goto continue_unlock; | |
1464 | ||
1465 | if (!clear_page_dirty_for_io(cc->rpages[i])) | |
1466 | goto continue_unlock; | |
4c8ff709 CY |
1467 | |
1468 | ret = f2fs_write_single_data_page(cc->rpages[i], &_submitted, | |
1469 | NULL, NULL, wbc, io_type, | |
3afae09f | 1470 | compr_blocks, false); |
4c8ff709 CY |
1471 | if (ret) { |
1472 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1473 | unlock_page(cc->rpages[i]); | |
1474 | ret = 0; | |
1475 | } else if (ret == -EAGAIN) { | |
466357dc CY |
1476 | /* |
1477 | * for quota file, just redirty left pages to | |
1478 | * avoid deadlock caused by cluster update race | |
1479 | * from foreground operation. | |
1480 | */ | |
7377e853 HJK |
1481 | if (IS_NOQUOTA(cc->inode)) |
1482 | return 0; | |
4c8ff709 | 1483 | ret = 0; |
a64239d0 | 1484 | f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT); |
4c8ff709 CY |
1485 | goto retry_write; |
1486 | } | |
7377e853 | 1487 | return ret; |
4c8ff709 CY |
1488 | } |
1489 | ||
1490 | *submitted += _submitted; | |
1491 | } | |
3afae09f CY |
1492 | |
1493 | f2fs_balance_fs(F2FS_M_SB(mapping), true); | |
1494 | ||
4c8ff709 | 1495 | return 0; |
4c8ff709 CY |
1496 | } |
1497 | ||
1498 | int f2fs_write_multi_pages(struct compress_ctx *cc, | |
1499 | int *submitted, | |
1500 | struct writeback_control *wbc, | |
1501 | enum iostat_type io_type) | |
1502 | { | |
4c8ff709 CY |
1503 | int err; |
1504 | ||
1505 | *submitted = 0; | |
1506 | if (cluster_may_compress(cc)) { | |
1507 | err = f2fs_compress_pages(cc); | |
1508 | if (err == -EAGAIN) { | |
09631cf3 | 1509 | add_compr_block_stat(cc->inode, cc->cluster_size); |
4c8ff709 CY |
1510 | goto write; |
1511 | } else if (err) { | |
1512 | f2fs_put_rpages_wbc(cc, wbc, true, 1); | |
1513 | goto destroy_out; | |
1514 | } | |
1515 | ||
1516 | err = f2fs_write_compressed_pages(cc, submitted, | |
1517 | wbc, io_type); | |
4c8ff709 CY |
1518 | if (!err) |
1519 | return 0; | |
1520 | f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN); | |
1521 | } | |
1522 | write: | |
1523 | f2fs_bug_on(F2FS_I_SB(cc->inode), *submitted); | |
1524 | ||
1525 | err = f2fs_write_raw_pages(cc, submitted, wbc, io_type); | |
1526 | f2fs_put_rpages_wbc(cc, wbc, false, 0); | |
1527 | destroy_out: | |
8bfbfb0d | 1528 | f2fs_destroy_compress_ctx(cc, false); |
4c8ff709 CY |
1529 | return err; |
1530 | } | |
1531 | ||
bff139b4 DJ |
1532 | static inline bool allow_memalloc_for_decomp(struct f2fs_sb_info *sbi, |
1533 | bool pre_alloc) | |
1534 | { | |
1535 | return pre_alloc ^ f2fs_low_mem_mode(sbi); | |
1536 | } | |
1537 | ||
1538 | static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic, | |
1539 | bool pre_alloc) | |
1540 | { | |
1541 | const struct f2fs_compress_ops *cops = | |
1542 | f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; | |
1543 | int i; | |
1544 | ||
1545 | if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) | |
1546 | return 0; | |
1547 | ||
1548 | dic->tpages = page_array_alloc(dic->inode, dic->cluster_size); | |
1549 | if (!dic->tpages) | |
1550 | return -ENOMEM; | |
1551 | ||
1552 | for (i = 0; i < dic->cluster_size; i++) { | |
1553 | if (dic->rpages[i]) { | |
1554 | dic->tpages[i] = dic->rpages[i]; | |
1555 | continue; | |
1556 | } | |
1557 | ||
1558 | dic->tpages[i] = f2fs_compress_alloc_page(); | |
1559 | if (!dic->tpages[i]) | |
1560 | return -ENOMEM; | |
1561 | } | |
1562 | ||
1563 | dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size); | |
1564 | if (!dic->rbuf) | |
1565 | return -ENOMEM; | |
1566 | ||
1567 | dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages); | |
1568 | if (!dic->cbuf) | |
1569 | return -ENOMEM; | |
1570 | ||
1571 | if (cops->init_decompress_ctx) { | |
1572 | int ret = cops->init_decompress_ctx(dic); | |
1573 | ||
1574 | if (ret) | |
1575 | return ret; | |
1576 | } | |
1577 | ||
1578 | return 0; | |
1579 | } | |
1580 | ||
1581 | static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, | |
1582 | bool bypass_destroy_callback, bool pre_alloc) | |
1583 | { | |
1584 | const struct f2fs_compress_ops *cops = | |
1585 | f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; | |
1586 | ||
1587 | if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) | |
1588 | return; | |
1589 | ||
1590 | if (!bypass_destroy_callback && cops->destroy_decompress_ctx) | |
1591 | cops->destroy_decompress_ctx(dic); | |
1592 | ||
1593 | if (dic->cbuf) | |
1594 | vm_unmap_ram(dic->cbuf, dic->nr_cpages); | |
1595 | ||
1596 | if (dic->rbuf) | |
1597 | vm_unmap_ram(dic->rbuf, dic->cluster_size); | |
1598 | } | |
1599 | ||
1600 | static void f2fs_free_dic(struct decompress_io_ctx *dic, | |
1601 | bool bypass_destroy_callback); | |
7f59b277 | 1602 | |
4c8ff709 CY |
1603 | struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) |
1604 | { | |
4c8ff709 CY |
1605 | struct decompress_io_ctx *dic; |
1606 | pgoff_t start_idx = start_idx_of_cluster(cc); | |
bff139b4 DJ |
1607 | struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); |
1608 | int i, ret; | |
4c8ff709 | 1609 | |
bff139b4 | 1610 | dic = f2fs_kmem_cache_alloc(dic_entry_slab, GFP_F2FS_ZERO, false, sbi); |
4c8ff709 CY |
1611 | if (!dic) |
1612 | return ERR_PTR(-ENOMEM); | |
1613 | ||
31083031 | 1614 | dic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
4c8ff709 | 1615 | if (!dic->rpages) { |
c68d6c88 | 1616 | kmem_cache_free(dic_entry_slab, dic); |
4c8ff709 CY |
1617 | return ERR_PTR(-ENOMEM); |
1618 | } | |
1619 | ||
1620 | dic->magic = F2FS_COMPRESSED_PAGE_MAGIC; | |
1621 | dic->inode = cc->inode; | |
7f59b277 | 1622 | atomic_set(&dic->remaining_pages, cc->nr_cpages); |
4c8ff709 CY |
1623 | dic->cluster_idx = cc->cluster_idx; |
1624 | dic->cluster_size = cc->cluster_size; | |
1625 | dic->log_cluster_size = cc->log_cluster_size; | |
1626 | dic->nr_cpages = cc->nr_cpages; | |
7f59b277 | 1627 | refcount_set(&dic->refcnt, 1); |
4c8ff709 | 1628 | dic->failed = false; |
7f59b277 | 1629 | dic->need_verity = f2fs_need_verity(cc->inode, start_idx); |
4c8ff709 CY |
1630 | |
1631 | for (i = 0; i < dic->cluster_size; i++) | |
1632 | dic->rpages[i] = cc->rpages[i]; | |
1633 | dic->nr_rpages = cc->cluster_size; | |
1634 | ||
31083031 | 1635 | dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages); |
bff139b4 DJ |
1636 | if (!dic->cpages) { |
1637 | ret = -ENOMEM; | |
4c8ff709 | 1638 | goto out_free; |
bff139b4 | 1639 | } |
4c8ff709 CY |
1640 | |
1641 | for (i = 0; i < dic->nr_cpages; i++) { | |
1642 | struct page *page; | |
1643 | ||
5e6bbde9 | 1644 | page = f2fs_compress_alloc_page(); |
bff139b4 DJ |
1645 | if (!page) { |
1646 | ret = -ENOMEM; | |
4c8ff709 | 1647 | goto out_free; |
bff139b4 | 1648 | } |
4c8ff709 CY |
1649 | |
1650 | f2fs_set_compressed_page(page, cc->inode, | |
887347a0 | 1651 | start_idx + i + 1, dic); |
4c8ff709 CY |
1652 | dic->cpages[i] = page; |
1653 | } | |
1654 | ||
bff139b4 DJ |
1655 | ret = f2fs_prepare_decomp_mem(dic, true); |
1656 | if (ret) | |
1657 | goto out_free; | |
1658 | ||
4c8ff709 CY |
1659 | return dic; |
1660 | ||
1661 | out_free: | |
bff139b4 DJ |
1662 | f2fs_free_dic(dic, true); |
1663 | return ERR_PTR(ret); | |
4c8ff709 CY |
1664 | } |
1665 | ||
bff139b4 DJ |
1666 | static void f2fs_free_dic(struct decompress_io_ctx *dic, |
1667 | bool bypass_destroy_callback) | |
4c8ff709 CY |
1668 | { |
1669 | int i; | |
1670 | ||
bff139b4 DJ |
1671 | f2fs_release_decomp_mem(dic, bypass_destroy_callback, true); |
1672 | ||
4c8ff709 CY |
1673 | if (dic->tpages) { |
1674 | for (i = 0; i < dic->cluster_size; i++) { | |
1675 | if (dic->rpages[i]) | |
1676 | continue; | |
8908e753 CY |
1677 | if (!dic->tpages[i]) |
1678 | continue; | |
5e6bbde9 | 1679 | f2fs_compress_free_page(dic->tpages[i]); |
4c8ff709 | 1680 | } |
31083031 | 1681 | page_array_free(dic->inode, dic->tpages, dic->cluster_size); |
4c8ff709 CY |
1682 | } |
1683 | ||
1684 | if (dic->cpages) { | |
1685 | for (i = 0; i < dic->nr_cpages; i++) { | |
1686 | if (!dic->cpages[i]) | |
1687 | continue; | |
5e6bbde9 | 1688 | f2fs_compress_free_page(dic->cpages[i]); |
4c8ff709 | 1689 | } |
31083031 | 1690 | page_array_free(dic->inode, dic->cpages, dic->nr_cpages); |
4c8ff709 CY |
1691 | } |
1692 | ||
31083031 | 1693 | page_array_free(dic->inode, dic->rpages, dic->nr_rpages); |
c68d6c88 | 1694 | kmem_cache_free(dic_entry_slab, dic); |
4c8ff709 CY |
1695 | } |
1696 | ||
bff139b4 | 1697 | static void f2fs_late_free_dic(struct work_struct *work) |
7f59b277 | 1698 | { |
bff139b4 DJ |
1699 | struct decompress_io_ctx *dic = |
1700 | container_of(work, struct decompress_io_ctx, free_work); | |
1701 | ||
1702 | f2fs_free_dic(dic, false); | |
1703 | } | |
1704 | ||
1705 | static void f2fs_put_dic(struct decompress_io_ctx *dic, bool in_task) | |
7f59b277 | 1706 | { |
bff139b4 DJ |
1707 | if (refcount_dec_and_test(&dic->refcnt)) { |
1708 | if (in_task) { | |
1709 | f2fs_free_dic(dic, false); | |
1710 | } else { | |
1711 | INIT_WORK(&dic->free_work, f2fs_late_free_dic); | |
1712 | queue_work(F2FS_I_SB(dic->inode)->post_read_wq, | |
1713 | &dic->free_work); | |
1714 | } | |
1715 | } | |
7f59b277 EB |
1716 | } |
1717 | ||
1718 | /* | |
1719 | * Update and unlock the cluster's pagecache pages, and release the reference to | |
1720 | * the decompress_io_ctx that was being held for I/O completion. | |
1721 | */ | |
bff139b4 DJ |
1722 | static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, |
1723 | bool in_task) | |
4c8ff709 CY |
1724 | { |
1725 | int i; | |
1726 | ||
7f59b277 EB |
1727 | for (i = 0; i < dic->cluster_size; i++) { |
1728 | struct page *rpage = dic->rpages[i]; | |
4c8ff709 CY |
1729 | |
1730 | if (!rpage) | |
1731 | continue; | |
1732 | ||
7f59b277 EB |
1733 | /* PG_error was set if verity failed. */ |
1734 | if (failed || PageError(rpage)) { | |
1735 | ClearPageUptodate(rpage); | |
1736 | /* will re-read again later */ | |
1737 | ClearPageError(rpage); | |
1738 | } else { | |
23c51bed | 1739 | SetPageUptodate(rpage); |
4c8ff709 CY |
1740 | } |
1741 | unlock_page(rpage); | |
1742 | } | |
7f59b277 | 1743 | |
bff139b4 | 1744 | f2fs_put_dic(dic, in_task); |
7f59b277 EB |
1745 | } |
1746 | ||
1747 | static void f2fs_verify_cluster(struct work_struct *work) | |
1748 | { | |
1749 | struct decompress_io_ctx *dic = | |
1750 | container_of(work, struct decompress_io_ctx, verity_work); | |
1751 | int i; | |
1752 | ||
1753 | /* Verify the cluster's decompressed pages with fs-verity. */ | |
1754 | for (i = 0; i < dic->cluster_size; i++) { | |
1755 | struct page *rpage = dic->rpages[i]; | |
1756 | ||
1757 | if (rpage && !fsverity_verify_page(rpage)) | |
1758 | SetPageError(rpage); | |
1759 | } | |
1760 | ||
bff139b4 | 1761 | __f2fs_decompress_end_io(dic, false, true); |
7f59b277 EB |
1762 | } |
1763 | ||
1764 | /* | |
1765 | * This is called when a compressed cluster has been decompressed | |
1766 | * (or failed to be read and/or decompressed). | |
1767 | */ | |
bff139b4 DJ |
1768 | void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, |
1769 | bool in_task) | |
7f59b277 EB |
1770 | { |
1771 | if (!failed && dic->need_verity) { | |
1772 | /* | |
1773 | * Note that to avoid deadlocks, the verity work can't be done | |
1774 | * on the decompression workqueue. This is because verifying | |
1775 | * the data pages can involve reading metadata pages from the | |
1776 | * file, and these metadata pages may be compressed. | |
1777 | */ | |
1778 | INIT_WORK(&dic->verity_work, f2fs_verify_cluster); | |
1779 | fsverity_enqueue_verify_work(&dic->verity_work); | |
1780 | } else { | |
bff139b4 | 1781 | __f2fs_decompress_end_io(dic, failed, in_task); |
7f59b277 EB |
1782 | } |
1783 | } | |
1784 | ||
1785 | /* | |
1786 | * Put a reference to a compressed page's decompress_io_ctx. | |
1787 | * | |
1788 | * This is called when the page is no longer needed and can be freed. | |
1789 | */ | |
bff139b4 | 1790 | void f2fs_put_page_dic(struct page *page, bool in_task) |
7f59b277 EB |
1791 | { |
1792 | struct decompress_io_ctx *dic = | |
1793 | (struct decompress_io_ctx *)page_private(page); | |
1794 | ||
bff139b4 | 1795 | f2fs_put_dic(dic, in_task); |
4c8ff709 | 1796 | } |
31083031 | 1797 | |
94afd6d6 CY |
1798 | /* |
1799 | * check whether cluster blocks are contiguous, and add extent cache entry | |
1800 | * only if cluster blocks are logically and physically contiguous. | |
1801 | */ | |
1802 | unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn) | |
1803 | { | |
1804 | bool compressed = f2fs_data_blkaddr(dn) == COMPRESS_ADDR; | |
1805 | int i = compressed ? 1 : 0; | |
1806 | block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page, | |
1807 | dn->ofs_in_node + i); | |
1808 | ||
1809 | for (i += 1; i < F2FS_I(dn->inode)->i_cluster_size; i++) { | |
1810 | block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, | |
1811 | dn->ofs_in_node + i); | |
1812 | ||
1813 | if (!__is_valid_data_blkaddr(blkaddr)) | |
1814 | break; | |
1815 | if (first_blkaddr + i - (compressed ? 1 : 0) != blkaddr) | |
1816 | return 0; | |
1817 | } | |
1818 | ||
1819 | return compressed ? i - 1 : i; | |
1820 | } | |
1821 | ||
6ce19aff | 1822 | const struct address_space_operations f2fs_compress_aops = { |
c26cd045 | 1823 | .release_folio = f2fs_release_folio, |
91503996 | 1824 | .invalidate_folio = f2fs_invalidate_folio, |
6ce19aff CY |
1825 | }; |
1826 | ||
1827 | struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi) | |
1828 | { | |
1829 | return sbi->compress_inode->i_mapping; | |
1830 | } | |
1831 | ||
1832 | void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr) | |
1833 | { | |
1834 | if (!sbi->compress_inode) | |
1835 | return; | |
1836 | invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr); | |
1837 | } | |
1838 | ||
1839 | void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, | |
1840 | nid_t ino, block_t blkaddr) | |
1841 | { | |
1842 | struct page *cpage; | |
1843 | int ret; | |
1844 | ||
1845 | if (!test_opt(sbi, COMPRESS_CACHE)) | |
1846 | return; | |
1847 | ||
1848 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) | |
1849 | return; | |
1850 | ||
1851 | if (!f2fs_available_free_memory(sbi, COMPRESS_PAGE)) | |
1852 | return; | |
1853 | ||
1854 | cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr); | |
1855 | if (cpage) { | |
1856 | f2fs_put_page(cpage, 0); | |
1857 | return; | |
1858 | } | |
1859 | ||
1860 | cpage = alloc_page(__GFP_NOWARN | __GFP_IO); | |
1861 | if (!cpage) | |
1862 | return; | |
1863 | ||
1864 | ret = add_to_page_cache_lru(cpage, COMPRESS_MAPPING(sbi), | |
1865 | blkaddr, GFP_NOFS); | |
1866 | if (ret) { | |
1867 | f2fs_put_page(cpage, 0); | |
1868 | return; | |
1869 | } | |
1870 | ||
1871 | set_page_private_data(cpage, ino); | |
1872 | ||
1873 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) | |
1874 | goto out; | |
1875 | ||
1876 | memcpy(page_address(cpage), page_address(page), PAGE_SIZE); | |
1877 | SetPageUptodate(cpage); | |
1878 | out: | |
1879 | f2fs_put_page(cpage, 1); | |
1880 | } | |
1881 | ||
1882 | bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page, | |
1883 | block_t blkaddr) | |
1884 | { | |
1885 | struct page *cpage; | |
1886 | bool hitted = false; | |
1887 | ||
1888 | if (!test_opt(sbi, COMPRESS_CACHE)) | |
1889 | return false; | |
1890 | ||
1891 | cpage = f2fs_pagecache_get_page(COMPRESS_MAPPING(sbi), | |
1892 | blkaddr, FGP_LOCK | FGP_NOWAIT, GFP_NOFS); | |
1893 | if (cpage) { | |
1894 | if (PageUptodate(cpage)) { | |
1895 | atomic_inc(&sbi->compress_page_hit); | |
1896 | memcpy(page_address(page), | |
1897 | page_address(cpage), PAGE_SIZE); | |
1898 | hitted = true; | |
1899 | } | |
1900 | f2fs_put_page(cpage, 1); | |
1901 | } | |
1902 | ||
1903 | return hitted; | |
1904 | } | |
1905 | ||
1906 | void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino) | |
1907 | { | |
1908 | struct address_space *mapping = sbi->compress_inode->i_mapping; | |
bbfe4f66 | 1909 | struct folio_batch fbatch; |
6ce19aff CY |
1910 | pgoff_t index = 0; |
1911 | pgoff_t end = MAX_BLKADDR(sbi); | |
1912 | ||
1913 | if (!mapping->nrpages) | |
1914 | return; | |
1915 | ||
bbfe4f66 | 1916 | folio_batch_init(&fbatch); |
6ce19aff CY |
1917 | |
1918 | do { | |
bbfe4f66 | 1919 | unsigned int nr, i; |
6ce19aff | 1920 | |
bbfe4f66 MWO |
1921 | nr = filemap_get_folios(mapping, &index, end - 1, &fbatch); |
1922 | if (!nr) | |
6ce19aff CY |
1923 | break; |
1924 | ||
bbfe4f66 MWO |
1925 | for (i = 0; i < nr; i++) { |
1926 | struct folio *folio = fbatch.folios[i]; | |
6ce19aff | 1927 | |
bbfe4f66 MWO |
1928 | folio_lock(folio); |
1929 | if (folio->mapping != mapping) { | |
1930 | folio_unlock(folio); | |
6ce19aff CY |
1931 | continue; |
1932 | } | |
1933 | ||
bbfe4f66 MWO |
1934 | if (ino != get_page_private_data(&folio->page)) { |
1935 | folio_unlock(folio); | |
6ce19aff CY |
1936 | continue; |
1937 | } | |
1938 | ||
bbfe4f66 MWO |
1939 | generic_error_remove_page(mapping, &folio->page); |
1940 | folio_unlock(folio); | |
6ce19aff | 1941 | } |
bbfe4f66 | 1942 | folio_batch_release(&fbatch); |
6ce19aff CY |
1943 | cond_resched(); |
1944 | } while (index < end); | |
1945 | } | |
1946 | ||
1947 | int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) | |
1948 | { | |
1949 | struct inode *inode; | |
1950 | ||
1951 | if (!test_opt(sbi, COMPRESS_CACHE)) | |
1952 | return 0; | |
1953 | ||
1954 | inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi)); | |
1955 | if (IS_ERR(inode)) | |
1956 | return PTR_ERR(inode); | |
1957 | sbi->compress_inode = inode; | |
1958 | ||
1959 | sbi->compress_percent = COMPRESS_PERCENT; | |
1960 | sbi->compress_watermark = COMPRESS_WATERMARK; | |
1961 | ||
1962 | atomic_set(&sbi->compress_page_hit, 0); | |
1963 | ||
1964 | return 0; | |
1965 | } | |
1966 | ||
1967 | void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) | |
1968 | { | |
1969 | if (!sbi->compress_inode) | |
1970 | return; | |
1971 | iput(sbi->compress_inode); | |
1972 | sbi->compress_inode = NULL; | |
1973 | } | |
1974 | ||
31083031 CY |
1975 | int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) |
1976 | { | |
1977 | dev_t dev = sbi->sb->s_bdev->bd_dev; | |
1978 | char slab_name[32]; | |
1979 | ||
29be7ec3 CY |
1980 | if (!f2fs_sb_has_compression(sbi)) |
1981 | return 0; | |
1982 | ||
31083031 CY |
1983 | sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); |
1984 | ||
1985 | sbi->page_array_slab_size = sizeof(struct page *) << | |
1986 | F2FS_OPTION(sbi).compress_log_size; | |
1987 | ||
1988 | sbi->page_array_slab = f2fs_kmem_cache_create(slab_name, | |
1989 | sbi->page_array_slab_size); | |
1990 | if (!sbi->page_array_slab) | |
1991 | return -ENOMEM; | |
1992 | return 0; | |
1993 | } | |
1994 | ||
1995 | void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) | |
1996 | { | |
1997 | kmem_cache_destroy(sbi->page_array_slab); | |
1998 | } | |
c68d6c88 CY |
1999 | |
2000 | static int __init f2fs_init_cic_cache(void) | |
2001 | { | |
2002 | cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry", | |
2003 | sizeof(struct compress_io_ctx)); | |
2004 | if (!cic_entry_slab) | |
2005 | return -ENOMEM; | |
2006 | return 0; | |
2007 | } | |
2008 | ||
2009 | static void f2fs_destroy_cic_cache(void) | |
2010 | { | |
2011 | kmem_cache_destroy(cic_entry_slab); | |
2012 | } | |
2013 | ||
2014 | static int __init f2fs_init_dic_cache(void) | |
2015 | { | |
2016 | dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry", | |
2017 | sizeof(struct decompress_io_ctx)); | |
2018 | if (!dic_entry_slab) | |
2019 | return -ENOMEM; | |
2020 | return 0; | |
2021 | } | |
2022 | ||
2023 | static void f2fs_destroy_dic_cache(void) | |
2024 | { | |
2025 | kmem_cache_destroy(dic_entry_slab); | |
2026 | } | |
2027 | ||
2028 | int __init f2fs_init_compress_cache(void) | |
2029 | { | |
2030 | int err; | |
2031 | ||
2032 | err = f2fs_init_cic_cache(); | |
2033 | if (err) | |
2034 | goto out; | |
2035 | err = f2fs_init_dic_cache(); | |
2036 | if (err) | |
2037 | goto free_cic; | |
2038 | return 0; | |
2039 | free_cic: | |
2040 | f2fs_destroy_cic_cache(); | |
2041 | out: | |
2042 | return -ENOMEM; | |
2043 | } | |
2044 | ||
2045 | void f2fs_destroy_compress_cache(void) | |
2046 | { | |
2047 | f2fs_destroy_dic_cache(); | |
2048 | f2fs_destroy_cic_cache(); | |
2049 | } |