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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 | 57 | int (*decompress_pages)(struct decompress_io_ctx *dic); |
c571fbb5 | 58 | bool (*is_level_valid)(int level); |
4c8ff709 CY |
59 | }; |
60 | ||
61 | static unsigned int offset_in_cluster(struct compress_ctx *cc, pgoff_t index) | |
62 | { | |
63 | return index & (cc->cluster_size - 1); | |
64 | } | |
65 | ||
66 | static pgoff_t cluster_idx(struct compress_ctx *cc, pgoff_t index) | |
67 | { | |
68 | return index >> cc->log_cluster_size; | |
69 | } | |
70 | ||
71 | static pgoff_t start_idx_of_cluster(struct compress_ctx *cc) | |
72 | { | |
73 | return cc->cluster_idx << cc->log_cluster_size; | |
74 | } | |
75 | ||
76 | bool f2fs_is_compressed_page(struct page *page) | |
77 | { | |
78 | if (!PagePrivate(page)) | |
79 | return false; | |
80 | if (!page_private(page)) | |
81 | return false; | |
b763f3be | 82 | if (page_private_nonpointer(page)) |
4c8ff709 | 83 | return false; |
29b993c7 | 84 | |
4c8ff709 CY |
85 | f2fs_bug_on(F2FS_M_SB(page->mapping), |
86 | *((u32 *)page_private(page)) != F2FS_COMPRESSED_PAGE_MAGIC); | |
87 | return true; | |
88 | } | |
89 | ||
90 | static void f2fs_set_compressed_page(struct page *page, | |
887347a0 | 91 | struct inode *inode, pgoff_t index, void *data) |
4c8ff709 | 92 | { |
b763f3be | 93 | attach_page_private(page, (void *)data); |
4c8ff709 CY |
94 | |
95 | /* i_crypto_info and iv index */ | |
96 | page->index = index; | |
97 | page->mapping = inode->i_mapping; | |
4c8ff709 CY |
98 | } |
99 | ||
4c8ff709 CY |
100 | static void f2fs_drop_rpages(struct compress_ctx *cc, int len, bool unlock) |
101 | { | |
102 | int i; | |
103 | ||
104 | for (i = 0; i < len; i++) { | |
105 | if (!cc->rpages[i]) | |
106 | continue; | |
107 | if (unlock) | |
108 | unlock_page(cc->rpages[i]); | |
109 | else | |
110 | put_page(cc->rpages[i]); | |
111 | } | |
112 | } | |
113 | ||
114 | static void f2fs_put_rpages(struct compress_ctx *cc) | |
115 | { | |
116 | f2fs_drop_rpages(cc, cc->cluster_size, false); | |
117 | } | |
118 | ||
119 | static void f2fs_unlock_rpages(struct compress_ctx *cc, int len) | |
120 | { | |
121 | f2fs_drop_rpages(cc, len, true); | |
122 | } | |
123 | ||
4c8ff709 CY |
124 | static void f2fs_put_rpages_wbc(struct compress_ctx *cc, |
125 | struct writeback_control *wbc, bool redirty, int unlock) | |
126 | { | |
127 | unsigned int i; | |
128 | ||
129 | for (i = 0; i < cc->cluster_size; i++) { | |
130 | if (!cc->rpages[i]) | |
131 | continue; | |
132 | if (redirty) | |
133 | redirty_page_for_writepage(wbc, cc->rpages[i]); | |
134 | f2fs_put_page(cc->rpages[i], unlock); | |
135 | } | |
136 | } | |
137 | ||
138 | struct page *f2fs_compress_control_page(struct page *page) | |
139 | { | |
140 | return ((struct compress_io_ctx *)page_private(page))->rpages[0]; | |
141 | } | |
142 | ||
143 | int f2fs_init_compress_ctx(struct compress_ctx *cc) | |
144 | { | |
adfc6943 | 145 | if (cc->rpages) |
4c8ff709 CY |
146 | return 0; |
147 | ||
31083031 | 148 | cc->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
4c8ff709 CY |
149 | return cc->rpages ? 0 : -ENOMEM; |
150 | } | |
151 | ||
8bfbfb0d | 152 | void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse) |
4c8ff709 | 153 | { |
31083031 | 154 | page_array_free(cc->inode, cc->rpages, cc->cluster_size); |
4c8ff709 CY |
155 | cc->rpages = NULL; |
156 | cc->nr_rpages = 0; | |
157 | cc->nr_cpages = 0; | |
3271d7eb | 158 | cc->valid_nr_cpages = 0; |
8bfbfb0d CY |
159 | if (!reuse) |
160 | cc->cluster_idx = NULL_CLUSTER; | |
4c8ff709 CY |
161 | } |
162 | ||
163 | void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page) | |
164 | { | |
165 | unsigned int cluster_ofs; | |
166 | ||
167 | if (!f2fs_cluster_can_merge_page(cc, page->index)) | |
168 | f2fs_bug_on(F2FS_I_SB(cc->inode), 1); | |
169 | ||
170 | cluster_ofs = offset_in_cluster(cc, page->index); | |
171 | cc->rpages[cluster_ofs] = page; | |
172 | cc->nr_rpages++; | |
173 | cc->cluster_idx = cluster_idx(cc, page->index); | |
174 | } | |
175 | ||
176 | #ifdef CONFIG_F2FS_FS_LZO | |
177 | static int lzo_init_compress_ctx(struct compress_ctx *cc) | |
178 | { | |
179 | cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), | |
180 | LZO1X_MEM_COMPRESS, GFP_NOFS); | |
181 | if (!cc->private) | |
182 | return -ENOMEM; | |
183 | ||
184 | cc->clen = lzo1x_worst_compress(PAGE_SIZE << cc->log_cluster_size); | |
185 | return 0; | |
186 | } | |
187 | ||
188 | static void lzo_destroy_compress_ctx(struct compress_ctx *cc) | |
189 | { | |
190 | kvfree(cc->private); | |
191 | cc->private = NULL; | |
192 | } | |
193 | ||
194 | static int lzo_compress_pages(struct compress_ctx *cc) | |
195 | { | |
196 | int ret; | |
197 | ||
198 | ret = lzo1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, | |
199 | &cc->clen, cc->private); | |
200 | if (ret != LZO_E_OK) { | |
201 | printk_ratelimited("%sF2FS-fs (%s): lzo compress failed, ret:%d\n", | |
202 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); | |
203 | return -EIO; | |
204 | } | |
205 | return 0; | |
206 | } | |
207 | ||
208 | static int lzo_decompress_pages(struct decompress_io_ctx *dic) | |
209 | { | |
210 | int ret; | |
211 | ||
212 | ret = lzo1x_decompress_safe(dic->cbuf->cdata, dic->clen, | |
213 | dic->rbuf, &dic->rlen); | |
214 | if (ret != LZO_E_OK) { | |
215 | printk_ratelimited("%sF2FS-fs (%s): lzo decompress failed, ret:%d\n", | |
216 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); | |
217 | return -EIO; | |
218 | } | |
219 | ||
220 | if (dic->rlen != PAGE_SIZE << dic->log_cluster_size) { | |
221 | printk_ratelimited("%sF2FS-fs (%s): lzo invalid rlen:%zu, " | |
222 | "expected:%lu\n", KERN_ERR, | |
223 | F2FS_I_SB(dic->inode)->sb->s_id, | |
224 | dic->rlen, | |
225 | PAGE_SIZE << dic->log_cluster_size); | |
226 | return -EIO; | |
227 | } | |
228 | return 0; | |
229 | } | |
230 | ||
231 | static const struct f2fs_compress_ops f2fs_lzo_ops = { | |
232 | .init_compress_ctx = lzo_init_compress_ctx, | |
233 | .destroy_compress_ctx = lzo_destroy_compress_ctx, | |
234 | .compress_pages = lzo_compress_pages, | |
235 | .decompress_pages = lzo_decompress_pages, | |
236 | }; | |
237 | #endif | |
238 | ||
239 | #ifdef CONFIG_F2FS_FS_LZ4 | |
240 | static int lz4_init_compress_ctx(struct compress_ctx *cc) | |
241 | { | |
3fde13f8 CY |
242 | unsigned int size = LZ4_MEM_COMPRESS; |
243 | ||
244 | #ifdef CONFIG_F2FS_FS_LZ4HC | |
b90e5086 | 245 | if (F2FS_I(cc->inode)->i_compress_level) |
3fde13f8 CY |
246 | size = LZ4HC_MEM_COMPRESS; |
247 | #endif | |
248 | ||
249 | cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), size, GFP_NOFS); | |
4c8ff709 CY |
250 | if (!cc->private) |
251 | return -ENOMEM; | |
252 | ||
f6644143 CY |
253 | /* |
254 | * we do not change cc->clen to LZ4_compressBound(inputsize) to | |
255 | * adapt worst compress case, because lz4 compressor can handle | |
256 | * output budget properly. | |
257 | */ | |
258 | cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; | |
4c8ff709 CY |
259 | return 0; |
260 | } | |
261 | ||
262 | static void lz4_destroy_compress_ctx(struct compress_ctx *cc) | |
263 | { | |
264 | kvfree(cc->private); | |
265 | cc->private = NULL; | |
266 | } | |
267 | ||
3094e557 | 268 | static int lz4_compress_pages(struct compress_ctx *cc) |
3fde13f8 | 269 | { |
3094e557 | 270 | int len = -EINVAL; |
b90e5086 | 271 | unsigned char level = F2FS_I(cc->inode)->i_compress_level; |
3fde13f8 | 272 | |
3094e557 | 273 | if (!level) |
3fde13f8 CY |
274 | len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, |
275 | cc->clen, cc->private); | |
3fde13f8 | 276 | #ifdef CONFIG_F2FS_FS_LZ4HC |
3094e557 YL |
277 | else |
278 | len = LZ4_compress_HC(cc->rbuf, cc->cbuf->cdata, cc->rlen, | |
279 | cc->clen, level, cc->private); | |
3fde13f8 | 280 | #endif |
3094e557 YL |
281 | if (len < 0) |
282 | return len; | |
f6644143 CY |
283 | if (!len) |
284 | return -EAGAIN; | |
285 | ||
4c8ff709 CY |
286 | cc->clen = len; |
287 | return 0; | |
288 | } | |
289 | ||
290 | static int lz4_decompress_pages(struct decompress_io_ctx *dic) | |
291 | { | |
292 | int ret; | |
293 | ||
294 | ret = LZ4_decompress_safe(dic->cbuf->cdata, dic->rbuf, | |
295 | dic->clen, dic->rlen); | |
296 | if (ret < 0) { | |
297 | printk_ratelimited("%sF2FS-fs (%s): lz4 decompress failed, ret:%d\n", | |
298 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); | |
299 | return -EIO; | |
300 | } | |
301 | ||
302 | if (ret != PAGE_SIZE << dic->log_cluster_size) { | |
d284af43 | 303 | printk_ratelimited("%sF2FS-fs (%s): lz4 invalid ret:%d, " |
4c8ff709 | 304 | "expected:%lu\n", KERN_ERR, |
d284af43 | 305 | F2FS_I_SB(dic->inode)->sb->s_id, ret, |
4c8ff709 CY |
306 | PAGE_SIZE << dic->log_cluster_size); |
307 | return -EIO; | |
308 | } | |
309 | return 0; | |
310 | } | |
311 | ||
c571fbb5 SY |
312 | static bool lz4_is_level_valid(int lvl) |
313 | { | |
314 | #ifdef CONFIG_F2FS_FS_LZ4HC | |
315 | return !lvl || (lvl >= LZ4HC_MIN_CLEVEL && lvl <= LZ4HC_MAX_CLEVEL); | |
316 | #else | |
317 | return lvl == 0; | |
318 | #endif | |
319 | } | |
320 | ||
4c8ff709 CY |
321 | static const struct f2fs_compress_ops f2fs_lz4_ops = { |
322 | .init_compress_ctx = lz4_init_compress_ctx, | |
323 | .destroy_compress_ctx = lz4_destroy_compress_ctx, | |
324 | .compress_pages = lz4_compress_pages, | |
325 | .decompress_pages = lz4_decompress_pages, | |
c571fbb5 | 326 | .is_level_valid = lz4_is_level_valid, |
4c8ff709 CY |
327 | }; |
328 | #endif | |
329 | ||
50cfa66f | 330 | #ifdef CONFIG_F2FS_FS_ZSTD |
50cfa66f CY |
331 | static int zstd_init_compress_ctx(struct compress_ctx *cc) |
332 | { | |
cf30f6a5 NT |
333 | zstd_parameters params; |
334 | zstd_cstream *stream; | |
50cfa66f CY |
335 | void *workspace; |
336 | unsigned int workspace_size; | |
b90e5086 | 337 | unsigned char level = F2FS_I(cc->inode)->i_compress_level; |
3fde13f8 | 338 | |
00e120b5 | 339 | /* Need to remain this for backward compatibility */ |
3fde13f8 CY |
340 | if (!level) |
341 | level = F2FS_ZSTD_DEFAULT_CLEVEL; | |
50cfa66f | 342 | |
4ff23a65 | 343 | params = zstd_get_params(level, cc->rlen); |
cf30f6a5 | 344 | workspace_size = zstd_cstream_workspace_bound(¶ms.cParams); |
50cfa66f CY |
345 | |
346 | workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode), | |
347 | workspace_size, GFP_NOFS); | |
348 | if (!workspace) | |
349 | return -ENOMEM; | |
350 | ||
cf30f6a5 | 351 | stream = zstd_init_cstream(¶ms, 0, workspace, workspace_size); |
50cfa66f | 352 | if (!stream) { |
cf30f6a5 | 353 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_cstream failed\n", |
50cfa66f CY |
354 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
355 | __func__); | |
356 | kvfree(workspace); | |
357 | return -EIO; | |
358 | } | |
359 | ||
360 | cc->private = workspace; | |
361 | cc->private2 = stream; | |
362 | ||
363 | cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static void zstd_destroy_compress_ctx(struct compress_ctx *cc) | |
368 | { | |
369 | kvfree(cc->private); | |
370 | cc->private = NULL; | |
371 | cc->private2 = NULL; | |
372 | } | |
373 | ||
374 | static int zstd_compress_pages(struct compress_ctx *cc) | |
375 | { | |
cf30f6a5 NT |
376 | zstd_cstream *stream = cc->private2; |
377 | zstd_in_buffer inbuf; | |
378 | zstd_out_buffer outbuf; | |
50cfa66f CY |
379 | int src_size = cc->rlen; |
380 | int dst_size = src_size - PAGE_SIZE - COMPRESS_HEADER_SIZE; | |
381 | int ret; | |
382 | ||
383 | inbuf.pos = 0; | |
384 | inbuf.src = cc->rbuf; | |
385 | inbuf.size = src_size; | |
386 | ||
387 | outbuf.pos = 0; | |
388 | outbuf.dst = cc->cbuf->cdata; | |
389 | outbuf.size = dst_size; | |
390 | ||
cf30f6a5 NT |
391 | ret = zstd_compress_stream(stream, &outbuf, &inbuf); |
392 | if (zstd_is_error(ret)) { | |
393 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_compress_stream failed, ret: %d\n", | |
50cfa66f | 394 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
cf30f6a5 | 395 | __func__, zstd_get_error_code(ret)); |
50cfa66f CY |
396 | return -EIO; |
397 | } | |
398 | ||
cf30f6a5 NT |
399 | ret = zstd_end_stream(stream, &outbuf); |
400 | if (zstd_is_error(ret)) { | |
401 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_end_stream returned %d\n", | |
50cfa66f | 402 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
cf30f6a5 | 403 | __func__, zstd_get_error_code(ret)); |
50cfa66f CY |
404 | return -EIO; |
405 | } | |
406 | ||
1454c978 CY |
407 | /* |
408 | * there is compressed data remained in intermediate buffer due to | |
409 | * no more space in cbuf.cdata | |
410 | */ | |
411 | if (ret) | |
412 | return -EAGAIN; | |
413 | ||
50cfa66f CY |
414 | cc->clen = outbuf.pos; |
415 | return 0; | |
416 | } | |
417 | ||
418 | static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic) | |
419 | { | |
cf30f6a5 | 420 | zstd_dstream *stream; |
50cfa66f CY |
421 | void *workspace; |
422 | unsigned int workspace_size; | |
0e2b7385 CY |
423 | unsigned int max_window_size = |
424 | MAX_COMPRESS_WINDOW_SIZE(dic->log_cluster_size); | |
50cfa66f | 425 | |
cf30f6a5 | 426 | workspace_size = zstd_dstream_workspace_bound(max_window_size); |
50cfa66f CY |
427 | |
428 | workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode), | |
429 | workspace_size, GFP_NOFS); | |
430 | if (!workspace) | |
431 | return -ENOMEM; | |
432 | ||
cf30f6a5 | 433 | stream = zstd_init_dstream(max_window_size, workspace, workspace_size); |
50cfa66f | 434 | if (!stream) { |
cf30f6a5 | 435 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_dstream failed\n", |
50cfa66f CY |
436 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, |
437 | __func__); | |
438 | kvfree(workspace); | |
439 | return -EIO; | |
440 | } | |
441 | ||
442 | dic->private = workspace; | |
443 | dic->private2 = stream; | |
444 | ||
445 | return 0; | |
446 | } | |
447 | ||
448 | static void zstd_destroy_decompress_ctx(struct decompress_io_ctx *dic) | |
449 | { | |
450 | kvfree(dic->private); | |
451 | dic->private = NULL; | |
452 | dic->private2 = NULL; | |
453 | } | |
454 | ||
455 | static int zstd_decompress_pages(struct decompress_io_ctx *dic) | |
456 | { | |
cf30f6a5 NT |
457 | zstd_dstream *stream = dic->private2; |
458 | zstd_in_buffer inbuf; | |
459 | zstd_out_buffer outbuf; | |
50cfa66f CY |
460 | int ret; |
461 | ||
462 | inbuf.pos = 0; | |
463 | inbuf.src = dic->cbuf->cdata; | |
464 | inbuf.size = dic->clen; | |
465 | ||
466 | outbuf.pos = 0; | |
467 | outbuf.dst = dic->rbuf; | |
468 | outbuf.size = dic->rlen; | |
469 | ||
cf30f6a5 NT |
470 | ret = zstd_decompress_stream(stream, &outbuf, &inbuf); |
471 | if (zstd_is_error(ret)) { | |
472 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_decompress_stream failed, ret: %d\n", | |
50cfa66f | 473 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, |
cf30f6a5 | 474 | __func__, zstd_get_error_code(ret)); |
50cfa66f CY |
475 | return -EIO; |
476 | } | |
477 | ||
478 | if (dic->rlen != outbuf.pos) { | |
479 | printk_ratelimited("%sF2FS-fs (%s): %s ZSTD invalid rlen:%zu, " | |
480 | "expected:%lu\n", KERN_ERR, | |
481 | F2FS_I_SB(dic->inode)->sb->s_id, | |
482 | __func__, dic->rlen, | |
483 | PAGE_SIZE << dic->log_cluster_size); | |
484 | return -EIO; | |
485 | } | |
486 | ||
487 | return 0; | |
488 | } | |
489 | ||
c571fbb5 SY |
490 | static bool zstd_is_level_valid(int lvl) |
491 | { | |
492 | return lvl >= zstd_min_clevel() && lvl <= zstd_max_clevel(); | |
493 | } | |
494 | ||
50cfa66f CY |
495 | static const struct f2fs_compress_ops f2fs_zstd_ops = { |
496 | .init_compress_ctx = zstd_init_compress_ctx, | |
497 | .destroy_compress_ctx = zstd_destroy_compress_ctx, | |
498 | .compress_pages = zstd_compress_pages, | |
499 | .init_decompress_ctx = zstd_init_decompress_ctx, | |
500 | .destroy_decompress_ctx = zstd_destroy_decompress_ctx, | |
501 | .decompress_pages = zstd_decompress_pages, | |
c571fbb5 | 502 | .is_level_valid = zstd_is_level_valid, |
50cfa66f CY |
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 | ||
c571fbb5 SY |
561 | bool f2fs_is_compress_level_valid(int alg, int lvl) |
562 | { | |
563 | const struct f2fs_compress_ops *cops = f2fs_cops[alg]; | |
564 | ||
565 | if (cops->is_level_valid) | |
566 | return cops->is_level_valid(lvl); | |
567 | ||
568 | return lvl == 0; | |
569 | } | |
570 | ||
99bbe307 | 571 | static mempool_t *compress_page_pool; |
5e6bbde9 CY |
572 | static int num_compress_pages = 512; |
573 | module_param(num_compress_pages, uint, 0444); | |
574 | MODULE_PARM_DESC(num_compress_pages, | |
575 | "Number of intermediate compress pages to preallocate"); | |
576 | ||
a1357a91 | 577 | int __init f2fs_init_compress_mempool(void) |
5e6bbde9 CY |
578 | { |
579 | compress_page_pool = mempool_create_page_pool(num_compress_pages, 0); | |
870af777 | 580 | return compress_page_pool ? 0 : -ENOMEM; |
5e6bbde9 CY |
581 | } |
582 | ||
583 | void f2fs_destroy_compress_mempool(void) | |
584 | { | |
585 | mempool_destroy(compress_page_pool); | |
586 | } | |
587 | ||
588 | static struct page *f2fs_compress_alloc_page(void) | |
4c8ff709 CY |
589 | { |
590 | struct page *page; | |
591 | ||
5e6bbde9 | 592 | page = mempool_alloc(compress_page_pool, GFP_NOFS); |
4c8ff709 | 593 | lock_page(page); |
5e6bbde9 | 594 | |
4c8ff709 CY |
595 | return page; |
596 | } | |
597 | ||
5e6bbde9 CY |
598 | static void f2fs_compress_free_page(struct page *page) |
599 | { | |
600 | if (!page) | |
601 | return; | |
b763f3be | 602 | detach_page_private(page); |
5e6bbde9 CY |
603 | page->mapping = NULL; |
604 | unlock_page(page); | |
605 | mempool_free(page, compress_page_pool); | |
606 | } | |
607 | ||
6fcaebac DJ |
608 | #define MAX_VMAP_RETRIES 3 |
609 | ||
610 | static void *f2fs_vmap(struct page **pages, unsigned int count) | |
611 | { | |
612 | int i; | |
613 | void *buf = NULL; | |
614 | ||
615 | for (i = 0; i < MAX_VMAP_RETRIES; i++) { | |
616 | buf = vm_map_ram(pages, count, -1); | |
617 | if (buf) | |
618 | break; | |
619 | vm_unmap_aliases(); | |
620 | } | |
621 | return buf; | |
622 | } | |
623 | ||
4c8ff709 CY |
624 | static int f2fs_compress_pages(struct compress_ctx *cc) |
625 | { | |
4c8ff709 CY |
626 | struct f2fs_inode_info *fi = F2FS_I(cc->inode); |
627 | const struct f2fs_compress_ops *cops = | |
628 | f2fs_cops[fi->i_compress_algorithm]; | |
31083031 | 629 | unsigned int max_len, new_nr_cpages; |
b28f047b | 630 | u32 chksum = 0; |
4c8ff709 CY |
631 | int i, ret; |
632 | ||
633 | trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx, | |
634 | cc->cluster_size, fi->i_compress_algorithm); | |
635 | ||
23b1faaa CY |
636 | if (cops->init_compress_ctx) { |
637 | ret = cops->init_compress_ctx(cc); | |
638 | if (ret) | |
639 | goto out; | |
640 | } | |
4c8ff709 CY |
641 | |
642 | max_len = COMPRESS_HEADER_SIZE + cc->clen; | |
643 | cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE); | |
3271d7eb | 644 | cc->valid_nr_cpages = cc->nr_cpages; |
4c8ff709 | 645 | |
31083031 | 646 | cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages); |
4c8ff709 CY |
647 | if (!cc->cpages) { |
648 | ret = -ENOMEM; | |
649 | goto destroy_compress_ctx; | |
650 | } | |
651 | ||
863907a4 | 652 | for (i = 0; i < cc->nr_cpages; i++) |
5e6bbde9 | 653 | cc->cpages[i] = f2fs_compress_alloc_page(); |
4c8ff709 | 654 | |
6fcaebac | 655 | cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size); |
4c8ff709 CY |
656 | if (!cc->rbuf) { |
657 | ret = -ENOMEM; | |
658 | goto out_free_cpages; | |
659 | } | |
660 | ||
6fcaebac | 661 | cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages); |
4c8ff709 CY |
662 | if (!cc->cbuf) { |
663 | ret = -ENOMEM; | |
664 | goto out_vunmap_rbuf; | |
665 | } | |
666 | ||
667 | ret = cops->compress_pages(cc); | |
668 | if (ret) | |
669 | goto out_vunmap_cbuf; | |
670 | ||
671 | max_len = PAGE_SIZE * (cc->cluster_size - 1) - COMPRESS_HEADER_SIZE; | |
672 | ||
673 | if (cc->clen > max_len) { | |
674 | ret = -EAGAIN; | |
675 | goto out_vunmap_cbuf; | |
676 | } | |
677 | ||
678 | cc->cbuf->clen = cpu_to_le32(cc->clen); | |
4c8ff709 | 679 | |
447286eb | 680 | if (fi->i_compress_flag & BIT(COMPRESS_CHKSUM)) |
b28f047b CY |
681 | chksum = f2fs_crc32(F2FS_I_SB(cc->inode), |
682 | cc->cbuf->cdata, cc->clen); | |
683 | cc->cbuf->chksum = cpu_to_le32(chksum); | |
684 | ||
4c8ff709 CY |
685 | for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++) |
686 | cc->cbuf->reserved[i] = cpu_to_le32(0); | |
687 | ||
31083031 CY |
688 | new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE); |
689 | ||
7fa6d598 EB |
690 | /* zero out any unused part of the last page */ |
691 | memset(&cc->cbuf->cdata[cc->clen], 0, | |
31083031 CY |
692 | (new_nr_cpages * PAGE_SIZE) - |
693 | (cc->clen + COMPRESS_HEADER_SIZE)); | |
7fa6d598 | 694 | |
6fcaebac DJ |
695 | vm_unmap_ram(cc->cbuf, cc->nr_cpages); |
696 | vm_unmap_ram(cc->rbuf, cc->cluster_size); | |
4c8ff709 | 697 | |
ebaaec35 | 698 | for (i = new_nr_cpages; i < cc->nr_cpages; i++) { |
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; | |
1aa161e4 JK |
765 | |
766 | /* Avoid f2fs_commit_super in irq context */ | |
633c8b94 | 767 | if (!in_task) |
901c12d1 | 768 | f2fs_handle_error_async(sbi, ERROR_FAIL_DECOMPRESSION); |
1aa161e4 JK |
769 | else |
770 | f2fs_handle_error(sbi, ERROR_FAIL_DECOMPRESSION); | |
bff139b4 | 771 | goto out_release; |
4c8ff709 CY |
772 | } |
773 | ||
774 | ret = cops->decompress_pages(dic); | |
775 | ||
447286eb | 776 | if (!ret && (fi->i_compress_flag & BIT(COMPRESS_CHKSUM))) { |
b28f047b CY |
777 | u32 provided = le32_to_cpu(dic->cbuf->chksum); |
778 | u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen); | |
779 | ||
780 | if (provided != calculated) { | |
781 | if (!is_inode_flag_set(dic->inode, FI_COMPRESS_CORRUPT)) { | |
782 | set_inode_flag(dic->inode, FI_COMPRESS_CORRUPT); | |
783 | printk_ratelimited( | |
784 | "%sF2FS-fs (%s): checksum invalid, nid = %lu, %x vs %x", | |
785 | KERN_INFO, sbi->sb->s_id, dic->inode->i_ino, | |
786 | provided, calculated); | |
787 | } | |
788 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
b28f047b CY |
789 | } |
790 | } | |
791 | ||
bff139b4 DJ |
792 | out_release: |
793 | f2fs_release_decomp_mem(dic, bypass_callback, false); | |
794 | ||
7f59b277 | 795 | out_end_io: |
4c8ff709 CY |
796 | trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx, |
797 | dic->clen, ret); | |
bff139b4 | 798 | f2fs_decompress_end_io(dic, ret, in_task); |
7f59b277 EB |
799 | } |
800 | ||
801 | /* | |
802 | * This is called when a page of a compressed cluster has been read from disk | |
803 | * (or failed to be read from disk). It checks whether this page was the last | |
804 | * page being waited on in the cluster, and if so, it decompresses the cluster | |
805 | * (or in the case of a failure, cleans up without actually decompressing). | |
806 | */ | |
6ce19aff | 807 | void f2fs_end_read_compressed_page(struct page *page, bool failed, |
bff139b4 | 808 | block_t blkaddr, bool in_task) |
7f59b277 EB |
809 | { |
810 | struct decompress_io_ctx *dic = | |
811 | (struct decompress_io_ctx *)page_private(page); | |
812 | struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); | |
813 | ||
814 | dec_page_count(sbi, F2FS_RD_DATA); | |
815 | ||
816 | if (failed) | |
817 | WRITE_ONCE(dic->failed, true); | |
bff139b4 | 818 | else if (blkaddr && in_task) |
6ce19aff CY |
819 | f2fs_cache_compressed_page(sbi, page, |
820 | dic->inode->i_ino, blkaddr); | |
7f59b277 EB |
821 | |
822 | if (atomic_dec_and_test(&dic->remaining_pages)) | |
bff139b4 | 823 | f2fs_decompress_cluster(dic, in_task); |
4c8ff709 CY |
824 | } |
825 | ||
826 | static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) | |
827 | { | |
828 | if (cc->cluster_idx == NULL_CLUSTER) | |
829 | return true; | |
830 | return cc->cluster_idx == cluster_idx(cc, index); | |
831 | } | |
832 | ||
833 | bool f2fs_cluster_is_empty(struct compress_ctx *cc) | |
834 | { | |
835 | return cc->nr_rpages == 0; | |
836 | } | |
837 | ||
838 | static bool f2fs_cluster_is_full(struct compress_ctx *cc) | |
839 | { | |
840 | return cc->cluster_size == cc->nr_rpages; | |
841 | } | |
842 | ||
843 | bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index) | |
844 | { | |
845 | if (f2fs_cluster_is_empty(cc)) | |
846 | return true; | |
847 | return is_page_in_cluster(cc, index); | |
848 | } | |
849 | ||
01fc4b9a | 850 | bool f2fs_all_cluster_page_ready(struct compress_ctx *cc, struct page **pages, |
4f8219f8 | 851 | int index, int nr_pages, bool uptodate) |
b368cc5e | 852 | { |
01fc4b9a | 853 | unsigned long pgidx = pages[index]->index; |
4f8219f8 | 854 | int i = uptodate ? 0 : 1; |
b368cc5e | 855 | |
4f8219f8 FC |
856 | /* |
857 | * when uptodate set to true, try to check all pages in cluster is | |
858 | * uptodate or not. | |
859 | */ | |
860 | if (uptodate && (pgidx % cc->cluster_size)) | |
b368cc5e FC |
861 | return false; |
862 | ||
4f8219f8 FC |
863 | if (nr_pages - index < cc->cluster_size) |
864 | return false; | |
b368cc5e | 865 | |
4f8219f8 | 866 | for (; i < cc->cluster_size; i++) { |
01fc4b9a | 867 | if (pages[index + i]->index != pgidx + i) |
b368cc5e | 868 | return false; |
01fc4b9a | 869 | if (uptodate && !PageUptodate(pages[index + i])) |
b368cc5e FC |
870 | return false; |
871 | } | |
872 | ||
873 | return true; | |
874 | } | |
875 | ||
5db479f0 | 876 | static bool cluster_has_invalid_data(struct compress_ctx *cc) |
4c8ff709 | 877 | { |
4c8ff709 CY |
878 | loff_t i_size = i_size_read(cc->inode); |
879 | unsigned nr_pages = DIV_ROUND_UP(i_size, PAGE_SIZE); | |
880 | int i; | |
881 | ||
882 | for (i = 0; i < cc->cluster_size; i++) { | |
883 | struct page *page = cc->rpages[i]; | |
884 | ||
8af85f71 | 885 | f2fs_bug_on(F2FS_I_SB(cc->inode), !page); |
4c8ff709 CY |
886 | |
887 | /* beyond EOF */ | |
888 | if (page->index >= nr_pages) | |
5db479f0 | 889 | return true; |
4c8ff709 | 890 | } |
5db479f0 | 891 | return false; |
4c8ff709 CY |
892 | } |
893 | ||
bbe1da7e CY |
894 | bool f2fs_sanity_check_cluster(struct dnode_of_data *dn) |
895 | { | |
2aaea533 | 896 | #ifdef CONFIG_F2FS_CHECK_FS |
bbe1da7e CY |
897 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
898 | unsigned int cluster_size = F2FS_I(dn->inode)->i_cluster_size; | |
bbe1da7e | 899 | int cluster_end = 0; |
2aaea533 | 900 | unsigned int count; |
bbe1da7e CY |
901 | int i; |
902 | char *reason = ""; | |
903 | ||
2aaea533 | 904 | if (dn->data_blkaddr != COMPRESS_ADDR) |
bbe1da7e CY |
905 | return false; |
906 | ||
907 | /* [..., COMPR_ADDR, ...] */ | |
908 | if (dn->ofs_in_node % cluster_size) { | |
909 | reason = "[*|C|*|*]"; | |
910 | goto out; | |
911 | } | |
912 | ||
2aaea533 | 913 | for (i = 1, count = 1; i < cluster_size; i++, count++) { |
bbe1da7e CY |
914 | block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, |
915 | dn->ofs_in_node + i); | |
916 | ||
917 | /* [COMPR_ADDR, ..., COMPR_ADDR] */ | |
918 | if (blkaddr == COMPRESS_ADDR) { | |
919 | reason = "[C|*|C|*]"; | |
920 | goto out; | |
921 | } | |
9df6d6f9 ZQ |
922 | if (!__is_valid_data_blkaddr(blkaddr)) { |
923 | if (!cluster_end) | |
924 | cluster_end = i; | |
925 | continue; | |
926 | } | |
927 | /* [COMPR_ADDR, NULL_ADDR or NEW_ADDR, valid_blkaddr] */ | |
928 | if (cluster_end) { | |
929 | reason = "[C|N|N|V]"; | |
930 | goto out; | |
bbe1da7e CY |
931 | } |
932 | } | |
2aaea533 CY |
933 | |
934 | f2fs_bug_on(F2FS_I_SB(dn->inode), count != cluster_size && | |
935 | !is_inode_flag_set(dn->inode, FI_COMPRESS_RELEASED)); | |
936 | ||
bbe1da7e CY |
937 | return false; |
938 | out: | |
939 | f2fs_warn(sbi, "access invalid cluster, ino:%lu, nid:%u, ofs_in_node:%u, reason:%s", | |
940 | dn->inode->i_ino, dn->nid, dn->ofs_in_node, reason); | |
941 | set_sbi_flag(sbi, SBI_NEED_FSCK); | |
942 | return true; | |
2aaea533 CY |
943 | #else |
944 | return false; | |
945 | #endif | |
946 | } | |
947 | ||
948 | static int __f2fs_get_cluster_blocks(struct inode *inode, | |
949 | struct dnode_of_data *dn) | |
950 | { | |
951 | unsigned int cluster_size = F2FS_I(inode)->i_cluster_size; | |
952 | int count, i; | |
953 | ||
954 | for (i = 1, count = 1; i < cluster_size; i++) { | |
955 | block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, | |
956 | dn->ofs_in_node + i); | |
957 | ||
958 | if (__is_valid_data_blkaddr(blkaddr)) | |
959 | count++; | |
960 | } | |
961 | ||
962 | return count; | |
bbe1da7e CY |
963 | } |
964 | ||
91f0fb69 | 965 | static int __f2fs_cluster_blocks(struct inode *inode, |
2aaea533 | 966 | unsigned int cluster_idx, bool compr_blks) |
4c8ff709 CY |
967 | { |
968 | struct dnode_of_data dn; | |
91f0fb69 CY |
969 | unsigned int start_idx = cluster_idx << |
970 | F2FS_I(inode)->i_log_cluster_size; | |
4c8ff709 CY |
971 | int ret; |
972 | ||
91f0fb69 CY |
973 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
974 | ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); | |
4c8ff709 CY |
975 | if (ret) { |
976 | if (ret == -ENOENT) | |
977 | ret = 0; | |
978 | goto fail; | |
979 | } | |
980 | ||
bbe1da7e CY |
981 | if (f2fs_sanity_check_cluster(&dn)) { |
982 | ret = -EFSCORRUPTED; | |
983 | goto fail; | |
984 | } | |
985 | ||
4c8ff709 | 986 | if (dn.data_blkaddr == COMPRESS_ADDR) { |
2aaea533 CY |
987 | if (compr_blks) |
988 | ret = __f2fs_get_cluster_blocks(inode, &dn); | |
989 | else | |
990 | ret = 1; | |
4c8ff709 CY |
991 | } |
992 | fail: | |
993 | f2fs_put_dnode(&dn); | |
994 | return ret; | |
995 | } | |
996 | ||
1a67cbe1 CY |
997 | /* return # of compressed blocks in compressed cluster */ |
998 | static int f2fs_compressed_blocks(struct compress_ctx *cc) | |
999 | { | |
91f0fb69 | 1000 | return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true); |
1a67cbe1 CY |
1001 | } |
1002 | ||
2aaea533 | 1003 | /* return whether cluster is compressed one or not */ |
4c8ff709 CY |
1004 | int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index) |
1005 | { | |
91f0fb69 CY |
1006 | return __f2fs_cluster_blocks(inode, |
1007 | index >> F2FS_I(inode)->i_log_cluster_size, | |
1008 | false); | |
4c8ff709 CY |
1009 | } |
1010 | ||
1011 | static bool cluster_may_compress(struct compress_ctx *cc) | |
1012 | { | |
602a16d5 | 1013 | if (!f2fs_need_compress_data(cc->inode)) |
4c8ff709 CY |
1014 | return false; |
1015 | if (f2fs_is_atomic_file(cc->inode)) | |
1016 | return false; | |
4c8ff709 CY |
1017 | if (!f2fs_cluster_is_full(cc)) |
1018 | return false; | |
dc35d73a CY |
1019 | if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode)))) |
1020 | return false; | |
5db479f0 | 1021 | return !cluster_has_invalid_data(cc); |
4c8ff709 CY |
1022 | } |
1023 | ||
1024 | static void set_cluster_writeback(struct compress_ctx *cc) | |
1025 | { | |
1026 | int i; | |
1027 | ||
1028 | for (i = 0; i < cc->cluster_size; i++) { | |
1029 | if (cc->rpages[i]) | |
1030 | set_page_writeback(cc->rpages[i]); | |
1031 | } | |
1032 | } | |
1033 | ||
1034 | static void set_cluster_dirty(struct compress_ctx *cc) | |
1035 | { | |
1036 | int i; | |
1037 | ||
1038 | for (i = 0; i < cc->cluster_size; i++) | |
4961acdd | 1039 | if (cc->rpages[i]) { |
4c8ff709 | 1040 | set_page_dirty(cc->rpages[i]); |
4961acdd CY |
1041 | set_page_private_gcing(cc->rpages[i]); |
1042 | } | |
4c8ff709 CY |
1043 | } |
1044 | ||
1045 | static int prepare_compress_overwrite(struct compress_ctx *cc, | |
1046 | struct page **pagep, pgoff_t index, void **fsdata) | |
1047 | { | |
1048 | struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); | |
1049 | struct address_space *mapping = cc->inode->i_mapping; | |
1050 | struct page *page; | |
4c8ff709 | 1051 | sector_t last_block_in_bio; |
ffc143db | 1052 | fgf_t fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; |
4c8ff709 CY |
1053 | pgoff_t start_idx = start_idx_of_cluster(cc); |
1054 | int i, ret; | |
4c8ff709 CY |
1055 | |
1056 | retry: | |
91f0fb69 | 1057 | ret = f2fs_is_compressed_cluster(cc->inode, start_idx); |
4c8ff709 CY |
1058 | if (ret <= 0) |
1059 | return ret; | |
1060 | ||
4c8ff709 CY |
1061 | ret = f2fs_init_compress_ctx(cc); |
1062 | if (ret) | |
1063 | return ret; | |
1064 | ||
1065 | /* keep page reference to avoid page reclaim */ | |
1066 | for (i = 0; i < cc->cluster_size; i++) { | |
1067 | page = f2fs_pagecache_get_page(mapping, start_idx + i, | |
1068 | fgp_flag, GFP_NOFS); | |
1069 | if (!page) { | |
1070 | ret = -ENOMEM; | |
1071 | goto unlock_pages; | |
1072 | } | |
1073 | ||
1074 | if (PageUptodate(page)) | |
a949dc5f | 1075 | f2fs_put_page(page, 1); |
4c8ff709 CY |
1076 | else |
1077 | f2fs_compress_ctx_add_page(cc, page); | |
1078 | } | |
1079 | ||
1080 | if (!f2fs_cluster_is_empty(cc)) { | |
1081 | struct bio *bio = NULL; | |
1082 | ||
1083 | ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size, | |
0683728a | 1084 | &last_block_in_bio, false, true); |
a949dc5f | 1085 | f2fs_put_rpages(cc); |
8bfbfb0d | 1086 | f2fs_destroy_compress_ctx(cc, true); |
4c8ff709 | 1087 | if (ret) |
a949dc5f | 1088 | goto out; |
4c8ff709 | 1089 | if (bio) |
bc29835a | 1090 | f2fs_submit_read_bio(sbi, bio, DATA); |
4c8ff709 CY |
1091 | |
1092 | ret = f2fs_init_compress_ctx(cc); | |
1093 | if (ret) | |
a949dc5f | 1094 | goto out; |
4c8ff709 CY |
1095 | } |
1096 | ||
1097 | for (i = 0; i < cc->cluster_size; i++) { | |
1098 | f2fs_bug_on(sbi, cc->rpages[i]); | |
1099 | ||
1100 | page = find_lock_page(mapping, start_idx + i); | |
a949dc5f CY |
1101 | if (!page) { |
1102 | /* page can be truncated */ | |
1103 | goto release_and_retry; | |
1104 | } | |
4c8ff709 CY |
1105 | |
1106 | f2fs_wait_on_page_writeback(page, DATA, true, true); | |
4c8ff709 | 1107 | f2fs_compress_ctx_add_page(cc, page); |
4c8ff709 CY |
1108 | |
1109 | if (!PageUptodate(page)) { | |
a949dc5f CY |
1110 | release_and_retry: |
1111 | f2fs_put_rpages(cc); | |
4c8ff709 | 1112 | f2fs_unlock_rpages(cc, i + 1); |
8bfbfb0d | 1113 | f2fs_destroy_compress_ctx(cc, true); |
4c8ff709 CY |
1114 | goto retry; |
1115 | } | |
1116 | } | |
1117 | ||
4c8ff709 CY |
1118 | if (likely(!ret)) { |
1119 | *fsdata = cc->rpages; | |
1120 | *pagep = cc->rpages[offset_in_cluster(cc, index)]; | |
1121 | return cc->cluster_size; | |
1122 | } | |
1123 | ||
1124 | unlock_pages: | |
a949dc5f | 1125 | f2fs_put_rpages(cc); |
4c8ff709 | 1126 | f2fs_unlock_rpages(cc, i); |
8bfbfb0d | 1127 | f2fs_destroy_compress_ctx(cc, true); |
a949dc5f | 1128 | out: |
4c8ff709 CY |
1129 | return ret; |
1130 | } | |
1131 | ||
1132 | int f2fs_prepare_compress_overwrite(struct inode *inode, | |
1133 | struct page **pagep, pgoff_t index, void **fsdata) | |
1134 | { | |
1135 | struct compress_ctx cc = { | |
1136 | .inode = inode, | |
1137 | .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, | |
1138 | .cluster_size = F2FS_I(inode)->i_cluster_size, | |
1139 | .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size, | |
1140 | .rpages = NULL, | |
1141 | .nr_rpages = 0, | |
1142 | }; | |
1143 | ||
1144 | return prepare_compress_overwrite(&cc, pagep, index, fsdata); | |
1145 | } | |
1146 | ||
1147 | bool f2fs_compress_write_end(struct inode *inode, void *fsdata, | |
1148 | pgoff_t index, unsigned copied) | |
1149 | ||
1150 | { | |
1151 | struct compress_ctx cc = { | |
31083031 | 1152 | .inode = inode, |
4c8ff709 CY |
1153 | .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, |
1154 | .cluster_size = F2FS_I(inode)->i_cluster_size, | |
1155 | .rpages = fsdata, | |
1156 | }; | |
1157 | bool first_index = (index == cc.rpages[0]->index); | |
1158 | ||
1159 | if (copied) | |
1160 | set_cluster_dirty(&cc); | |
1161 | ||
1162 | f2fs_put_rpages_wbc(&cc, NULL, false, 1); | |
8bfbfb0d | 1163 | f2fs_destroy_compress_ctx(&cc, false); |
4c8ff709 CY |
1164 | |
1165 | return first_index; | |
1166 | } | |
1167 | ||
3265d3db CY |
1168 | int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock) |
1169 | { | |
1170 | void *fsdata = NULL; | |
1171 | struct page *pagep; | |
1172 | int log_cluster_size = F2FS_I(inode)->i_log_cluster_size; | |
1173 | pgoff_t start_idx = from >> (PAGE_SHIFT + log_cluster_size) << | |
1174 | log_cluster_size; | |
1175 | int err; | |
1176 | ||
1177 | err = f2fs_is_compressed_cluster(inode, start_idx); | |
1178 | if (err < 0) | |
1179 | return err; | |
1180 | ||
1181 | /* truncate normal cluster */ | |
1182 | if (!err) | |
1183 | return f2fs_do_truncate_blocks(inode, from, lock); | |
1184 | ||
1185 | /* truncate compressed cluster */ | |
1186 | err = f2fs_prepare_compress_overwrite(inode, &pagep, | |
1187 | start_idx, &fsdata); | |
1188 | ||
1189 | /* should not be a normal cluster */ | |
1190 | f2fs_bug_on(F2FS_I_SB(inode), err == 0); | |
1191 | ||
1192 | if (err <= 0) | |
1193 | return err; | |
1194 | ||
1195 | if (err > 0) { | |
1196 | struct page **rpages = fsdata; | |
1197 | int cluster_size = F2FS_I(inode)->i_cluster_size; | |
1198 | int i; | |
1199 | ||
1200 | for (i = cluster_size - 1; i >= 0; i--) { | |
1201 | loff_t start = rpages[i]->index << PAGE_SHIFT; | |
1202 | ||
1203 | if (from <= start) { | |
1204 | zero_user_segment(rpages[i], 0, PAGE_SIZE); | |
1205 | } else { | |
1206 | zero_user_segment(rpages[i], from - start, | |
1207 | PAGE_SIZE); | |
1208 | break; | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | f2fs_compress_write_end(inode, fsdata, start_idx, true); | |
1213 | } | |
1214 | return 0; | |
1215 | } | |
1216 | ||
4c8ff709 CY |
1217 | static int f2fs_write_compressed_pages(struct compress_ctx *cc, |
1218 | int *submitted, | |
1219 | struct writeback_control *wbc, | |
1220 | enum iostat_type io_type) | |
1221 | { | |
1222 | struct inode *inode = cc->inode; | |
1223 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1224 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
1225 | struct f2fs_io_info fio = { | |
1226 | .sbi = sbi, | |
1227 | .ino = cc->inode->i_ino, | |
1228 | .type = DATA, | |
1229 | .op = REQ_OP_WRITE, | |
1230 | .op_flags = wbc_to_write_flags(wbc), | |
1231 | .old_blkaddr = NEW_ADDR, | |
1232 | .page = NULL, | |
1233 | .encrypted_page = NULL, | |
1234 | .compressed_page = NULL, | |
2eae077e | 1235 | .submitted = 0, |
4c8ff709 CY |
1236 | .io_type = io_type, |
1237 | .io_wbc = wbc, | |
2eae077e CY |
1238 | .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode) ? |
1239 | 1 : 0, | |
4c8ff709 CY |
1240 | }; |
1241 | struct dnode_of_data dn; | |
1242 | struct node_info ni; | |
1243 | struct compress_io_ctx *cic; | |
1244 | pgoff_t start_idx = start_idx_of_cluster(cc); | |
1245 | unsigned int last_index = cc->cluster_size - 1; | |
1246 | loff_t psize; | |
1247 | int i, err; | |
f082c6b2 | 1248 | bool quota_inode = IS_NOQUOTA(inode); |
4c8ff709 | 1249 | |
146949de | 1250 | /* we should bypass data pages to proceed the kworker jobs */ |
ee68d271 CY |
1251 | if (unlikely(f2fs_cp_error(sbi))) { |
1252 | mapping_set_error(cc->rpages[0]->mapping, -EIO); | |
1253 | goto out_free; | |
1254 | } | |
1255 | ||
f082c6b2 | 1256 | if (quota_inode) { |
79963d96 CY |
1257 | /* |
1258 | * We need to wait for node_write to avoid block allocation during | |
1259 | * checkpoint. This can only happen to quota writes which can cause | |
1260 | * the below discard race condition. | |
1261 | */ | |
e4544b63 | 1262 | f2fs_down_read(&sbi->node_write); |
79963d96 | 1263 | } else if (!f2fs_trylock_op(sbi)) { |
31083031 | 1264 | goto out_free; |
79963d96 | 1265 | } |
4c8ff709 | 1266 | |
df77fbd8 | 1267 | set_new_dnode(&dn, cc->inode, NULL, NULL, 0); |
4c8ff709 CY |
1268 | |
1269 | err = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); | |
1270 | if (err) | |
1271 | goto out_unlock_op; | |
1272 | ||
1273 | for (i = 0; i < cc->cluster_size; i++) { | |
a2ced1ce | 1274 | if (data_blkaddr(dn.inode, dn.node_page, |
4c8ff709 CY |
1275 | dn.ofs_in_node + i) == NULL_ADDR) |
1276 | goto out_put_dnode; | |
1277 | } | |
1278 | ||
1279 | psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT; | |
1280 | ||
a9419b63 | 1281 | err = f2fs_get_node_info(fio.sbi, dn.nid, &ni, false); |
4c8ff709 CY |
1282 | if (err) |
1283 | goto out_put_dnode; | |
1284 | ||
1285 | fio.version = ni.version; | |
1286 | ||
32410577 | 1287 | cic = f2fs_kmem_cache_alloc(cic_entry_slab, GFP_F2FS_ZERO, false, sbi); |
4c8ff709 CY |
1288 | if (!cic) |
1289 | goto out_put_dnode; | |
1290 | ||
1291 | cic->magic = F2FS_COMPRESSED_PAGE_MAGIC; | |
1292 | cic->inode = inode; | |
3271d7eb | 1293 | atomic_set(&cic->pending_pages, cc->valid_nr_cpages); |
31083031 | 1294 | cic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
4c8ff709 CY |
1295 | if (!cic->rpages) |
1296 | goto out_put_cic; | |
1297 | ||
1298 | cic->nr_rpages = cc->cluster_size; | |
1299 | ||
3271d7eb | 1300 | for (i = 0; i < cc->valid_nr_cpages; i++) { |
4c8ff709 | 1301 | f2fs_set_compressed_page(cc->cpages[i], inode, |
887347a0 | 1302 | cc->rpages[i + 1]->index, cic); |
4c8ff709 | 1303 | fio.compressed_page = cc->cpages[i]; |
f567adb0 CY |
1304 | |
1305 | fio.old_blkaddr = data_blkaddr(dn.inode, dn.node_page, | |
1306 | dn.ofs_in_node + i + 1); | |
1307 | ||
1308 | /* wait for GCed page writeback via META_MAPPING */ | |
1309 | f2fs_wait_on_block_writeback(inode, fio.old_blkaddr); | |
1310 | ||
4c8ff709 CY |
1311 | if (fio.encrypted) { |
1312 | fio.page = cc->rpages[i + 1]; | |
1313 | err = f2fs_encrypt_one_page(&fio); | |
1314 | if (err) | |
1315 | goto out_destroy_crypt; | |
1316 | cc->cpages[i] = fio.encrypted_page; | |
1317 | } | |
1318 | } | |
1319 | ||
1320 | set_cluster_writeback(cc); | |
1321 | ||
1322 | for (i = 0; i < cc->cluster_size; i++) | |
1323 | cic->rpages[i] = cc->rpages[i]; | |
1324 | ||
1325 | for (i = 0; i < cc->cluster_size; i++, dn.ofs_in_node++) { | |
1326 | block_t blkaddr; | |
1327 | ||
a2ced1ce | 1328 | blkaddr = f2fs_data_blkaddr(&dn); |
95978caa | 1329 | fio.page = cc->rpages[i]; |
4c8ff709 CY |
1330 | fio.old_blkaddr = blkaddr; |
1331 | ||
1332 | /* cluster header */ | |
1333 | if (i == 0) { | |
1334 | if (blkaddr == COMPRESS_ADDR) | |
1335 | fio.compr_blocks++; | |
1336 | if (__is_valid_data_blkaddr(blkaddr)) | |
1337 | f2fs_invalidate_blocks(sbi, blkaddr); | |
1338 | f2fs_update_data_blkaddr(&dn, COMPRESS_ADDR); | |
1339 | goto unlock_continue; | |
1340 | } | |
1341 | ||
1342 | if (fio.compr_blocks && __is_valid_data_blkaddr(blkaddr)) | |
1343 | fio.compr_blocks++; | |
1344 | ||
3271d7eb | 1345 | if (i > cc->valid_nr_cpages) { |
4c8ff709 CY |
1346 | if (__is_valid_data_blkaddr(blkaddr)) { |
1347 | f2fs_invalidate_blocks(sbi, blkaddr); | |
1348 | f2fs_update_data_blkaddr(&dn, NEW_ADDR); | |
1349 | } | |
1350 | goto unlock_continue; | |
1351 | } | |
1352 | ||
1353 | f2fs_bug_on(fio.sbi, blkaddr == NULL_ADDR); | |
1354 | ||
1355 | if (fio.encrypted) | |
1356 | fio.encrypted_page = cc->cpages[i - 1]; | |
1357 | else | |
1358 | fio.compressed_page = cc->cpages[i - 1]; | |
1359 | ||
1360 | cc->cpages[i - 1] = NULL; | |
1361 | f2fs_outplace_write_data(&dn, &fio); | |
1362 | (*submitted)++; | |
1363 | unlock_continue: | |
1364 | inode_dec_dirty_pages(cc->inode); | |
1365 | unlock_page(fio.page); | |
1366 | } | |
1367 | ||
1368 | if (fio.compr_blocks) | |
1369 | f2fs_i_compr_blocks_update(inode, fio.compr_blocks - 1, false); | |
3271d7eb FC |
1370 | f2fs_i_compr_blocks_update(inode, cc->valid_nr_cpages, true); |
1371 | add_compr_block_stat(inode, cc->valid_nr_cpages); | |
4c8ff709 CY |
1372 | |
1373 | set_inode_flag(cc->inode, FI_APPEND_WRITE); | |
4c8ff709 CY |
1374 | |
1375 | f2fs_put_dnode(&dn); | |
f082c6b2 | 1376 | if (quota_inode) |
e4544b63 | 1377 | f2fs_up_read(&sbi->node_write); |
79963d96 | 1378 | else |
435cbab9 | 1379 | f2fs_unlock_op(sbi); |
4c8ff709 | 1380 | |
c10c9820 | 1381 | spin_lock(&fi->i_size_lock); |
4c8ff709 CY |
1382 | if (fi->last_disk_size < psize) |
1383 | fi->last_disk_size = psize; | |
c10c9820 | 1384 | spin_unlock(&fi->i_size_lock); |
4c8ff709 CY |
1385 | |
1386 | f2fs_put_rpages(cc); | |
31083031 CY |
1387 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
1388 | cc->cpages = NULL; | |
8bfbfb0d | 1389 | f2fs_destroy_compress_ctx(cc, false); |
4c8ff709 CY |
1390 | return 0; |
1391 | ||
1392 | out_destroy_crypt: | |
31083031 | 1393 | page_array_free(cc->inode, cic->rpages, cc->cluster_size); |
4c8ff709 CY |
1394 | |
1395 | for (--i; i >= 0; i--) | |
1396 | fscrypt_finalize_bounce_page(&cc->cpages[i]); | |
4c8ff709 | 1397 | out_put_cic: |
c68d6c88 | 1398 | kmem_cache_free(cic_entry_slab, cic); |
4c8ff709 CY |
1399 | out_put_dnode: |
1400 | f2fs_put_dnode(&dn); | |
1401 | out_unlock_op: | |
f082c6b2 | 1402 | if (quota_inode) |
e4544b63 | 1403 | f2fs_up_read(&sbi->node_write); |
79963d96 | 1404 | else |
435cbab9 | 1405 | f2fs_unlock_op(sbi); |
31083031 | 1406 | out_free: |
3271d7eb | 1407 | for (i = 0; i < cc->valid_nr_cpages; i++) { |
827f0284 JK |
1408 | f2fs_compress_free_page(cc->cpages[i]); |
1409 | cc->cpages[i] = NULL; | |
1410 | } | |
31083031 CY |
1411 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
1412 | cc->cpages = NULL; | |
4c8ff709 CY |
1413 | return -EAGAIN; |
1414 | } | |
1415 | ||
1416 | void f2fs_compress_write_end_io(struct bio *bio, struct page *page) | |
1417 | { | |
1418 | struct f2fs_sb_info *sbi = bio->bi_private; | |
1419 | struct compress_io_ctx *cic = | |
1420 | (struct compress_io_ctx *)page_private(page); | |
8a430dd4 CY |
1421 | enum count_type type = WB_DATA_TYPE(page, |
1422 | f2fs_is_compressed_page(page)); | |
4c8ff709 CY |
1423 | int i; |
1424 | ||
1425 | if (unlikely(bio->bi_status)) | |
1426 | mapping_set_error(cic->inode->i_mapping, -EIO); | |
1427 | ||
5e6bbde9 | 1428 | f2fs_compress_free_page(page); |
4c8ff709 | 1429 | |
8a430dd4 | 1430 | dec_page_count(sbi, type); |
4c8ff709 | 1431 | |
e6c3948d | 1432 | if (atomic_dec_return(&cic->pending_pages)) |
4c8ff709 CY |
1433 | return; |
1434 | ||
1435 | for (i = 0; i < cic->nr_rpages; i++) { | |
1436 | WARN_ON(!cic->rpages[i]); | |
b763f3be | 1437 | clear_page_private_gcing(cic->rpages[i]); |
4c8ff709 CY |
1438 | end_page_writeback(cic->rpages[i]); |
1439 | } | |
1440 | ||
31083031 | 1441 | page_array_free(cic->inode, cic->rpages, cic->nr_rpages); |
c68d6c88 | 1442 | kmem_cache_free(cic_entry_slab, cic); |
4c8ff709 CY |
1443 | } |
1444 | ||
1445 | static int f2fs_write_raw_pages(struct compress_ctx *cc, | |
1446 | int *submitted, | |
1447 | struct writeback_control *wbc, | |
1448 | enum iostat_type io_type) | |
1449 | { | |
1450 | struct address_space *mapping = cc->inode->i_mapping; | |
7377e853 | 1451 | int _submitted, compr_blocks, ret, i; |
4c8ff709 CY |
1452 | |
1453 | compr_blocks = f2fs_compressed_blocks(cc); | |
7377e853 HJK |
1454 | |
1455 | for (i = 0; i < cc->cluster_size; i++) { | |
1456 | if (!cc->rpages[i]) | |
1457 | continue; | |
1458 | ||
1459 | redirty_page_for_writepage(wbc, cc->rpages[i]); | |
1460 | unlock_page(cc->rpages[i]); | |
4c8ff709 CY |
1461 | } |
1462 | ||
7377e853 HJK |
1463 | if (compr_blocks < 0) |
1464 | return compr_blocks; | |
1465 | ||
4c8ff709 CY |
1466 | for (i = 0; i < cc->cluster_size; i++) { |
1467 | if (!cc->rpages[i]) | |
1468 | continue; | |
1469 | retry_write: | |
7377e853 HJK |
1470 | lock_page(cc->rpages[i]); |
1471 | ||
4c8ff709 | 1472 | if (cc->rpages[i]->mapping != mapping) { |
7377e853 | 1473 | continue_unlock: |
4c8ff709 CY |
1474 | unlock_page(cc->rpages[i]); |
1475 | continue; | |
1476 | } | |
1477 | ||
7377e853 HJK |
1478 | if (!PageDirty(cc->rpages[i])) |
1479 | goto continue_unlock; | |
1480 | ||
babedcba YL |
1481 | if (PageWriteback(cc->rpages[i])) { |
1482 | if (wbc->sync_mode == WB_SYNC_NONE) | |
1483 | goto continue_unlock; | |
1484 | f2fs_wait_on_page_writeback(cc->rpages[i], DATA, true, true); | |
1485 | } | |
1486 | ||
7377e853 HJK |
1487 | if (!clear_page_dirty_for_io(cc->rpages[i])) |
1488 | goto continue_unlock; | |
4c8ff709 CY |
1489 | |
1490 | ret = f2fs_write_single_data_page(cc->rpages[i], &_submitted, | |
1491 | NULL, NULL, wbc, io_type, | |
3afae09f | 1492 | compr_blocks, false); |
4c8ff709 CY |
1493 | if (ret) { |
1494 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1495 | unlock_page(cc->rpages[i]); | |
1496 | ret = 0; | |
1497 | } else if (ret == -EAGAIN) { | |
466357dc CY |
1498 | /* |
1499 | * for quota file, just redirty left pages to | |
1500 | * avoid deadlock caused by cluster update race | |
1501 | * from foreground operation. | |
1502 | */ | |
7377e853 HJK |
1503 | if (IS_NOQUOTA(cc->inode)) |
1504 | return 0; | |
4c8ff709 | 1505 | ret = 0; |
a64239d0 | 1506 | f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT); |
4c8ff709 CY |
1507 | goto retry_write; |
1508 | } | |
7377e853 | 1509 | return ret; |
4c8ff709 CY |
1510 | } |
1511 | ||
1512 | *submitted += _submitted; | |
1513 | } | |
3afae09f CY |
1514 | |
1515 | f2fs_balance_fs(F2FS_M_SB(mapping), true); | |
1516 | ||
4c8ff709 | 1517 | return 0; |
4c8ff709 CY |
1518 | } |
1519 | ||
1520 | int f2fs_write_multi_pages(struct compress_ctx *cc, | |
1521 | int *submitted, | |
1522 | struct writeback_control *wbc, | |
1523 | enum iostat_type io_type) | |
1524 | { | |
4c8ff709 CY |
1525 | int err; |
1526 | ||
1527 | *submitted = 0; | |
1528 | if (cluster_may_compress(cc)) { | |
1529 | err = f2fs_compress_pages(cc); | |
1530 | if (err == -EAGAIN) { | |
09631cf3 | 1531 | add_compr_block_stat(cc->inode, cc->cluster_size); |
4c8ff709 CY |
1532 | goto write; |
1533 | } else if (err) { | |
1534 | f2fs_put_rpages_wbc(cc, wbc, true, 1); | |
1535 | goto destroy_out; | |
1536 | } | |
1537 | ||
1538 | err = f2fs_write_compressed_pages(cc, submitted, | |
1539 | wbc, io_type); | |
4c8ff709 CY |
1540 | if (!err) |
1541 | return 0; | |
1542 | f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN); | |
1543 | } | |
1544 | write: | |
1545 | f2fs_bug_on(F2FS_I_SB(cc->inode), *submitted); | |
1546 | ||
1547 | err = f2fs_write_raw_pages(cc, submitted, wbc, io_type); | |
1548 | f2fs_put_rpages_wbc(cc, wbc, false, 0); | |
1549 | destroy_out: | |
8bfbfb0d | 1550 | f2fs_destroy_compress_ctx(cc, false); |
4c8ff709 CY |
1551 | return err; |
1552 | } | |
1553 | ||
bff139b4 DJ |
1554 | static inline bool allow_memalloc_for_decomp(struct f2fs_sb_info *sbi, |
1555 | bool pre_alloc) | |
1556 | { | |
1557 | return pre_alloc ^ f2fs_low_mem_mode(sbi); | |
1558 | } | |
1559 | ||
1560 | static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic, | |
1561 | bool pre_alloc) | |
1562 | { | |
1563 | const struct f2fs_compress_ops *cops = | |
1564 | f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; | |
1565 | int i; | |
1566 | ||
1567 | if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) | |
1568 | return 0; | |
1569 | ||
1570 | dic->tpages = page_array_alloc(dic->inode, dic->cluster_size); | |
1571 | if (!dic->tpages) | |
1572 | return -ENOMEM; | |
1573 | ||
1574 | for (i = 0; i < dic->cluster_size; i++) { | |
1575 | if (dic->rpages[i]) { | |
1576 | dic->tpages[i] = dic->rpages[i]; | |
1577 | continue; | |
1578 | } | |
1579 | ||
1580 | dic->tpages[i] = f2fs_compress_alloc_page(); | |
bff139b4 DJ |
1581 | } |
1582 | ||
1583 | dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size); | |
1584 | if (!dic->rbuf) | |
1585 | return -ENOMEM; | |
1586 | ||
1587 | dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages); | |
1588 | if (!dic->cbuf) | |
1589 | return -ENOMEM; | |
1590 | ||
8140654e ZQ |
1591 | if (cops->init_decompress_ctx) |
1592 | return cops->init_decompress_ctx(dic); | |
bff139b4 DJ |
1593 | |
1594 | return 0; | |
1595 | } | |
1596 | ||
1597 | static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, | |
1598 | bool bypass_destroy_callback, bool pre_alloc) | |
1599 | { | |
1600 | const struct f2fs_compress_ops *cops = | |
1601 | f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; | |
1602 | ||
1603 | if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) | |
1604 | return; | |
1605 | ||
1606 | if (!bypass_destroy_callback && cops->destroy_decompress_ctx) | |
1607 | cops->destroy_decompress_ctx(dic); | |
1608 | ||
1609 | if (dic->cbuf) | |
1610 | vm_unmap_ram(dic->cbuf, dic->nr_cpages); | |
1611 | ||
1612 | if (dic->rbuf) | |
1613 | vm_unmap_ram(dic->rbuf, dic->cluster_size); | |
1614 | } | |
1615 | ||
1616 | static void f2fs_free_dic(struct decompress_io_ctx *dic, | |
1617 | bool bypass_destroy_callback); | |
7f59b277 | 1618 | |
4c8ff709 CY |
1619 | struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) |
1620 | { | |
4c8ff709 CY |
1621 | struct decompress_io_ctx *dic; |
1622 | pgoff_t start_idx = start_idx_of_cluster(cc); | |
bff139b4 DJ |
1623 | struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); |
1624 | int i, ret; | |
4c8ff709 | 1625 | |
bff139b4 | 1626 | dic = f2fs_kmem_cache_alloc(dic_entry_slab, GFP_F2FS_ZERO, false, sbi); |
4c8ff709 CY |
1627 | if (!dic) |
1628 | return ERR_PTR(-ENOMEM); | |
1629 | ||
31083031 | 1630 | dic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
4c8ff709 | 1631 | if (!dic->rpages) { |
c68d6c88 | 1632 | kmem_cache_free(dic_entry_slab, dic); |
4c8ff709 CY |
1633 | return ERR_PTR(-ENOMEM); |
1634 | } | |
1635 | ||
1636 | dic->magic = F2FS_COMPRESSED_PAGE_MAGIC; | |
1637 | dic->inode = cc->inode; | |
7f59b277 | 1638 | atomic_set(&dic->remaining_pages, cc->nr_cpages); |
4c8ff709 CY |
1639 | dic->cluster_idx = cc->cluster_idx; |
1640 | dic->cluster_size = cc->cluster_size; | |
1641 | dic->log_cluster_size = cc->log_cluster_size; | |
1642 | dic->nr_cpages = cc->nr_cpages; | |
7f59b277 | 1643 | refcount_set(&dic->refcnt, 1); |
4c8ff709 | 1644 | dic->failed = false; |
7f59b277 | 1645 | dic->need_verity = f2fs_need_verity(cc->inode, start_idx); |
4c8ff709 CY |
1646 | |
1647 | for (i = 0; i < dic->cluster_size; i++) | |
1648 | dic->rpages[i] = cc->rpages[i]; | |
1649 | dic->nr_rpages = cc->cluster_size; | |
1650 | ||
31083031 | 1651 | dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages); |
bff139b4 DJ |
1652 | if (!dic->cpages) { |
1653 | ret = -ENOMEM; | |
4c8ff709 | 1654 | goto out_free; |
bff139b4 | 1655 | } |
4c8ff709 CY |
1656 | |
1657 | for (i = 0; i < dic->nr_cpages; i++) { | |
1658 | struct page *page; | |
1659 | ||
5e6bbde9 | 1660 | page = f2fs_compress_alloc_page(); |
4c8ff709 | 1661 | f2fs_set_compressed_page(page, cc->inode, |
887347a0 | 1662 | start_idx + i + 1, dic); |
4c8ff709 CY |
1663 | dic->cpages[i] = page; |
1664 | } | |
1665 | ||
bff139b4 DJ |
1666 | ret = f2fs_prepare_decomp_mem(dic, true); |
1667 | if (ret) | |
1668 | goto out_free; | |
1669 | ||
4c8ff709 CY |
1670 | return dic; |
1671 | ||
1672 | out_free: | |
bff139b4 DJ |
1673 | f2fs_free_dic(dic, true); |
1674 | return ERR_PTR(ret); | |
4c8ff709 CY |
1675 | } |
1676 | ||
bff139b4 DJ |
1677 | static void f2fs_free_dic(struct decompress_io_ctx *dic, |
1678 | bool bypass_destroy_callback) | |
4c8ff709 CY |
1679 | { |
1680 | int i; | |
1681 | ||
bff139b4 DJ |
1682 | f2fs_release_decomp_mem(dic, bypass_destroy_callback, true); |
1683 | ||
4c8ff709 CY |
1684 | if (dic->tpages) { |
1685 | for (i = 0; i < dic->cluster_size; i++) { | |
1686 | if (dic->rpages[i]) | |
1687 | continue; | |
8908e753 CY |
1688 | if (!dic->tpages[i]) |
1689 | continue; | |
5e6bbde9 | 1690 | f2fs_compress_free_page(dic->tpages[i]); |
4c8ff709 | 1691 | } |
31083031 | 1692 | page_array_free(dic->inode, dic->tpages, dic->cluster_size); |
4c8ff709 CY |
1693 | } |
1694 | ||
1695 | if (dic->cpages) { | |
1696 | for (i = 0; i < dic->nr_cpages; i++) { | |
1697 | if (!dic->cpages[i]) | |
1698 | continue; | |
5e6bbde9 | 1699 | f2fs_compress_free_page(dic->cpages[i]); |
4c8ff709 | 1700 | } |
31083031 | 1701 | page_array_free(dic->inode, dic->cpages, dic->nr_cpages); |
4c8ff709 CY |
1702 | } |
1703 | ||
31083031 | 1704 | page_array_free(dic->inode, dic->rpages, dic->nr_rpages); |
c68d6c88 | 1705 | kmem_cache_free(dic_entry_slab, dic); |
4c8ff709 CY |
1706 | } |
1707 | ||
bff139b4 | 1708 | static void f2fs_late_free_dic(struct work_struct *work) |
7f59b277 | 1709 | { |
bff139b4 DJ |
1710 | struct decompress_io_ctx *dic = |
1711 | container_of(work, struct decompress_io_ctx, free_work); | |
1712 | ||
1713 | f2fs_free_dic(dic, false); | |
1714 | } | |
1715 | ||
1716 | static void f2fs_put_dic(struct decompress_io_ctx *dic, bool in_task) | |
7f59b277 | 1717 | { |
bff139b4 DJ |
1718 | if (refcount_dec_and_test(&dic->refcnt)) { |
1719 | if (in_task) { | |
1720 | f2fs_free_dic(dic, false); | |
1721 | } else { | |
1722 | INIT_WORK(&dic->free_work, f2fs_late_free_dic); | |
1723 | queue_work(F2FS_I_SB(dic->inode)->post_read_wq, | |
1724 | &dic->free_work); | |
1725 | } | |
1726 | } | |
7f59b277 EB |
1727 | } |
1728 | ||
98dc08ba | 1729 | static void f2fs_verify_cluster(struct work_struct *work) |
4c8ff709 | 1730 | { |
98dc08ba EB |
1731 | struct decompress_io_ctx *dic = |
1732 | container_of(work, struct decompress_io_ctx, verity_work); | |
4c8ff709 CY |
1733 | int i; |
1734 | ||
98dc08ba | 1735 | /* Verify, update, and unlock the decompressed pages. */ |
7f59b277 EB |
1736 | for (i = 0; i < dic->cluster_size; i++) { |
1737 | struct page *rpage = dic->rpages[i]; | |
4c8ff709 CY |
1738 | |
1739 | if (!rpage) | |
1740 | continue; | |
1741 | ||
98dc08ba | 1742 | if (fsverity_verify_page(rpage)) |
23c51bed | 1743 | SetPageUptodate(rpage); |
98dc08ba EB |
1744 | else |
1745 | ClearPageUptodate(rpage); | |
4c8ff709 CY |
1746 | unlock_page(rpage); |
1747 | } | |
7f59b277 | 1748 | |
98dc08ba | 1749 | f2fs_put_dic(dic, true); |
7f59b277 EB |
1750 | } |
1751 | ||
1752 | /* | |
1753 | * This is called when a compressed cluster has been decompressed | |
1754 | * (or failed to be read and/or decompressed). | |
1755 | */ | |
bff139b4 DJ |
1756 | void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, |
1757 | bool in_task) | |
7f59b277 | 1758 | { |
98dc08ba EB |
1759 | int i; |
1760 | ||
7f59b277 EB |
1761 | if (!failed && dic->need_verity) { |
1762 | /* | |
1763 | * Note that to avoid deadlocks, the verity work can't be done | |
1764 | * on the decompression workqueue. This is because verifying | |
1765 | * the data pages can involve reading metadata pages from the | |
1766 | * file, and these metadata pages may be compressed. | |
1767 | */ | |
1768 | INIT_WORK(&dic->verity_work, f2fs_verify_cluster); | |
1769 | fsverity_enqueue_verify_work(&dic->verity_work); | |
98dc08ba EB |
1770 | return; |
1771 | } | |
1772 | ||
1773 | /* Update and unlock the cluster's pagecache pages. */ | |
1774 | for (i = 0; i < dic->cluster_size; i++) { | |
1775 | struct page *rpage = dic->rpages[i]; | |
1776 | ||
1777 | if (!rpage) | |
1778 | continue; | |
1779 | ||
1780 | if (failed) | |
1781 | ClearPageUptodate(rpage); | |
1782 | else | |
1783 | SetPageUptodate(rpage); | |
1784 | unlock_page(rpage); | |
7f59b277 | 1785 | } |
98dc08ba EB |
1786 | |
1787 | /* | |
1788 | * Release the reference to the decompress_io_ctx that was being held | |
1789 | * for I/O completion. | |
1790 | */ | |
1791 | f2fs_put_dic(dic, in_task); | |
7f59b277 EB |
1792 | } |
1793 | ||
1794 | /* | |
1795 | * Put a reference to a compressed page's decompress_io_ctx. | |
1796 | * | |
1797 | * This is called when the page is no longer needed and can be freed. | |
1798 | */ | |
bff139b4 | 1799 | void f2fs_put_page_dic(struct page *page, bool in_task) |
7f59b277 EB |
1800 | { |
1801 | struct decompress_io_ctx *dic = | |
1802 | (struct decompress_io_ctx *)page_private(page); | |
1803 | ||
bff139b4 | 1804 | f2fs_put_dic(dic, in_task); |
4c8ff709 | 1805 | } |
31083031 | 1806 | |
94afd6d6 CY |
1807 | /* |
1808 | * check whether cluster blocks are contiguous, and add extent cache entry | |
1809 | * only if cluster blocks are logically and physically contiguous. | |
1810 | */ | |
1811 | unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn) | |
1812 | { | |
1813 | bool compressed = f2fs_data_blkaddr(dn) == COMPRESS_ADDR; | |
1814 | int i = compressed ? 1 : 0; | |
1815 | block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page, | |
1816 | dn->ofs_in_node + i); | |
1817 | ||
1818 | for (i += 1; i < F2FS_I(dn->inode)->i_cluster_size; i++) { | |
1819 | block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, | |
1820 | dn->ofs_in_node + i); | |
1821 | ||
1822 | if (!__is_valid_data_blkaddr(blkaddr)) | |
1823 | break; | |
1824 | if (first_blkaddr + i - (compressed ? 1 : 0) != blkaddr) | |
1825 | return 0; | |
1826 | } | |
1827 | ||
1828 | return compressed ? i - 1 : i; | |
1829 | } | |
1830 | ||
6ce19aff | 1831 | const struct address_space_operations f2fs_compress_aops = { |
c26cd045 | 1832 | .release_folio = f2fs_release_folio, |
91503996 | 1833 | .invalidate_folio = f2fs_invalidate_folio, |
f35474ec | 1834 | .migrate_folio = filemap_migrate_folio, |
6ce19aff CY |
1835 | }; |
1836 | ||
1837 | struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi) | |
1838 | { | |
1839 | return sbi->compress_inode->i_mapping; | |
1840 | } | |
1841 | ||
1842 | void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr) | |
1843 | { | |
1844 | if (!sbi->compress_inode) | |
1845 | return; | |
1846 | invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr); | |
1847 | } | |
1848 | ||
1849 | void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, | |
1850 | nid_t ino, block_t blkaddr) | |
1851 | { | |
1852 | struct page *cpage; | |
1853 | int ret; | |
1854 | ||
1855 | if (!test_opt(sbi, COMPRESS_CACHE)) | |
1856 | return; | |
1857 | ||
1858 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) | |
1859 | return; | |
1860 | ||
1861 | if (!f2fs_available_free_memory(sbi, COMPRESS_PAGE)) | |
1862 | return; | |
1863 | ||
1864 | cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr); | |
1865 | if (cpage) { | |
1866 | f2fs_put_page(cpage, 0); | |
1867 | return; | |
1868 | } | |
1869 | ||
1870 | cpage = alloc_page(__GFP_NOWARN | __GFP_IO); | |
1871 | if (!cpage) | |
1872 | return; | |
1873 | ||
1874 | ret = add_to_page_cache_lru(cpage, COMPRESS_MAPPING(sbi), | |
1875 | blkaddr, GFP_NOFS); | |
1876 | if (ret) { | |
1877 | f2fs_put_page(cpage, 0); | |
1878 | return; | |
1879 | } | |
1880 | ||
1881 | set_page_private_data(cpage, ino); | |
1882 | ||
1883 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) | |
1884 | goto out; | |
1885 | ||
1886 | memcpy(page_address(cpage), page_address(page), PAGE_SIZE); | |
1887 | SetPageUptodate(cpage); | |
1888 | out: | |
1889 | f2fs_put_page(cpage, 1); | |
1890 | } | |
1891 | ||
1892 | bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page, | |
1893 | block_t blkaddr) | |
1894 | { | |
1895 | struct page *cpage; | |
1896 | bool hitted = false; | |
1897 | ||
1898 | if (!test_opt(sbi, COMPRESS_CACHE)) | |
1899 | return false; | |
1900 | ||
1901 | cpage = f2fs_pagecache_get_page(COMPRESS_MAPPING(sbi), | |
1902 | blkaddr, FGP_LOCK | FGP_NOWAIT, GFP_NOFS); | |
1903 | if (cpage) { | |
1904 | if (PageUptodate(cpage)) { | |
1905 | atomic_inc(&sbi->compress_page_hit); | |
1906 | memcpy(page_address(page), | |
1907 | page_address(cpage), PAGE_SIZE); | |
1908 | hitted = true; | |
1909 | } | |
1910 | f2fs_put_page(cpage, 1); | |
1911 | } | |
1912 | ||
1913 | return hitted; | |
1914 | } | |
1915 | ||
1916 | void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino) | |
1917 | { | |
173cdf2c | 1918 | struct address_space *mapping = COMPRESS_MAPPING(sbi); |
bbfe4f66 | 1919 | struct folio_batch fbatch; |
6ce19aff CY |
1920 | pgoff_t index = 0; |
1921 | pgoff_t end = MAX_BLKADDR(sbi); | |
1922 | ||
1923 | if (!mapping->nrpages) | |
1924 | return; | |
1925 | ||
bbfe4f66 | 1926 | folio_batch_init(&fbatch); |
6ce19aff CY |
1927 | |
1928 | do { | |
bbfe4f66 | 1929 | unsigned int nr, i; |
6ce19aff | 1930 | |
bbfe4f66 MWO |
1931 | nr = filemap_get_folios(mapping, &index, end - 1, &fbatch); |
1932 | if (!nr) | |
6ce19aff CY |
1933 | break; |
1934 | ||
bbfe4f66 MWO |
1935 | for (i = 0; i < nr; i++) { |
1936 | struct folio *folio = fbatch.folios[i]; | |
6ce19aff | 1937 | |
bbfe4f66 MWO |
1938 | folio_lock(folio); |
1939 | if (folio->mapping != mapping) { | |
1940 | folio_unlock(folio); | |
6ce19aff CY |
1941 | continue; |
1942 | } | |
1943 | ||
bbfe4f66 MWO |
1944 | if (ino != get_page_private_data(&folio->page)) { |
1945 | folio_unlock(folio); | |
6ce19aff CY |
1946 | continue; |
1947 | } | |
1948 | ||
af7628d6 | 1949 | generic_error_remove_folio(mapping, folio); |
bbfe4f66 | 1950 | folio_unlock(folio); |
6ce19aff | 1951 | } |
bbfe4f66 | 1952 | folio_batch_release(&fbatch); |
6ce19aff CY |
1953 | cond_resched(); |
1954 | } while (index < end); | |
1955 | } | |
1956 | ||
1957 | int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) | |
1958 | { | |
1959 | struct inode *inode; | |
1960 | ||
1961 | if (!test_opt(sbi, COMPRESS_CACHE)) | |
1962 | return 0; | |
1963 | ||
1964 | inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi)); | |
1965 | if (IS_ERR(inode)) | |
1966 | return PTR_ERR(inode); | |
1967 | sbi->compress_inode = inode; | |
1968 | ||
1969 | sbi->compress_percent = COMPRESS_PERCENT; | |
1970 | sbi->compress_watermark = COMPRESS_WATERMARK; | |
1971 | ||
1972 | atomic_set(&sbi->compress_page_hit, 0); | |
1973 | ||
1974 | return 0; | |
1975 | } | |
1976 | ||
1977 | void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) | |
1978 | { | |
1979 | if (!sbi->compress_inode) | |
1980 | return; | |
1981 | iput(sbi->compress_inode); | |
1982 | sbi->compress_inode = NULL; | |
1983 | } | |
1984 | ||
31083031 CY |
1985 | int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) |
1986 | { | |
1987 | dev_t dev = sbi->sb->s_bdev->bd_dev; | |
e0d4e8ac | 1988 | char slab_name[35]; |
31083031 | 1989 | |
29be7ec3 CY |
1990 | if (!f2fs_sb_has_compression(sbi)) |
1991 | return 0; | |
1992 | ||
31083031 CY |
1993 | sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); |
1994 | ||
1995 | sbi->page_array_slab_size = sizeof(struct page *) << | |
1996 | F2FS_OPTION(sbi).compress_log_size; | |
1997 | ||
1998 | sbi->page_array_slab = f2fs_kmem_cache_create(slab_name, | |
1999 | sbi->page_array_slab_size); | |
870af777 | 2000 | return sbi->page_array_slab ? 0 : -ENOMEM; |
31083031 CY |
2001 | } |
2002 | ||
2003 | void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) | |
2004 | { | |
2005 | kmem_cache_destroy(sbi->page_array_slab); | |
2006 | } | |
c68d6c88 | 2007 | |
870af777 | 2008 | int __init f2fs_init_compress_cache(void) |
c68d6c88 CY |
2009 | { |
2010 | cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry", | |
2011 | sizeof(struct compress_io_ctx)); | |
2012 | if (!cic_entry_slab) | |
2013 | return -ENOMEM; | |
c68d6c88 CY |
2014 | dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry", |
2015 | sizeof(struct decompress_io_ctx)); | |
2016 | if (!dic_entry_slab) | |
c68d6c88 CY |
2017 | goto free_cic; |
2018 | return 0; | |
2019 | free_cic: | |
870af777 | 2020 | kmem_cache_destroy(cic_entry_slab); |
c68d6c88 CY |
2021 | return -ENOMEM; |
2022 | } | |
2023 | ||
2024 | void f2fs_destroy_compress_cache(void) | |
2025 | { | |
870af777 YL |
2026 | kmem_cache_destroy(dic_entry_slab); |
2027 | kmem_cache_destroy(cic_entry_slab); | |
c68d6c88 | 2028 | } |