Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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> |
Christoph Hellwig | e41d12f | 2021-09-20 14:33:13 +0200 | [diff] [blame] | 10 | #include <linux/moduleparam.h> |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 11 | #include <linux/writeback.h> |
| 12 | #include <linux/backing-dev.h> |
| 13 | #include <linux/lzo.h> |
| 14 | #include <linux/lz4.h> |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 15 | #include <linux/zstd.h> |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 16 | #include <linux/pagevec.h> |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 17 | |
| 18 | #include "f2fs.h" |
| 19 | #include "node.h" |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 20 | #include "segment.h" |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 21 | #include <trace/events/f2fs.h> |
| 22 | |
Chao Yu | c68d6c8 | 2020-09-14 17:05:14 +0800 | [diff] [blame] | 23 | static struct kmem_cache *cic_entry_slab; |
| 24 | static struct kmem_cache *dic_entry_slab; |
| 25 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 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)) |
Chao Yu | 3241057 | 2021-08-09 08:24:48 +0800 | [diff] [blame] | 32 | return f2fs_kmem_cache_alloc(sbi->page_array_slab, |
| 33 | GFP_F2FS_ZERO, false, F2FS_I_SB(inode)); |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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); |
Chao Yu | 23b1faaad | 2020-03-03 16:57:07 +0800 | [diff] [blame] | 55 | int (*init_decompress_ctx)(struct decompress_io_ctx *dic); |
| 56 | void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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; |
Chao Yu | b763f3b | 2021-04-28 17:20:31 +0800 | [diff] [blame] | 81 | if (page_private_nonpointer(page)) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 82 | return false; |
Yu Changchun | 29b993c | 2020-06-20 03:58:29 -0400 | [diff] [blame] | 83 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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, |
Chao Yu | 887347a | 2020-03-28 17:33:23 +0800 | [diff] [blame] | 90 | struct inode *inode, pgoff_t index, void *data) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 91 | { |
Chao Yu | b763f3b | 2021-04-28 17:20:31 +0800 | [diff] [blame] | 92 | attach_page_private(page, (void *)data); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 93 | |
| 94 | /* i_crypto_info and iv index */ |
| 95 | page->index = index; |
| 96 | page->mapping = inode->i_mapping; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 97 | } |
| 98 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | { |
Jaegeuk Kim | adfc694 | 2020-09-23 00:54:50 -0700 | [diff] [blame] | 144 | if (cc->rpages) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 145 | return 0; |
| 146 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 147 | cc->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 148 | return cc->rpages ? 0 : -ENOMEM; |
| 149 | } |
| 150 | |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 151 | void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 152 | { |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 153 | page_array_free(cc->inode, cc->rpages, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 154 | cc->rpages = NULL; |
| 155 | cc->nr_rpages = 0; |
| 156 | cc->nr_cpages = 0; |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 157 | cc->valid_nr_cpages = 0; |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 158 | if (!reuse) |
| 159 | cc->cluster_idx = NULL_CLUSTER; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | { |
Chao Yu | 3fde13f | 2021-01-22 17:46:43 +0800 | [diff] [blame] | 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); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 249 | if (!cc->private) |
| 250 | return -ENOMEM; |
| 251 | |
Chao Yu | f664414 | 2020-05-09 15:01:04 +0800 | [diff] [blame] | 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; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Chao Yu | 3fde13f | 2021-01-22 17:46:43 +0800 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 288 | static int lz4_compress_pages(struct compress_ctx *cc) |
| 289 | { |
| 290 | int len; |
| 291 | |
Chao Yu | 3fde13f | 2021-01-22 17:46:43 +0800 | [diff] [blame] | 292 | #ifdef CONFIG_F2FS_FS_LZ4HC |
| 293 | return lz4hc_compress_pages(cc); |
| 294 | #endif |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 295 | len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, |
| 296 | cc->clen, cc->private); |
Chao Yu | f664414 | 2020-05-09 15:01:04 +0800 | [diff] [blame] | 297 | if (!len) |
| 298 | return -EAGAIN; |
| 299 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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) { |
Chao Yu | d284af4 | 2022-03-16 18:20:00 +0800 | [diff] [blame] | 317 | printk_ratelimited("%sF2FS-fs (%s): lz4 invalid ret:%d, " |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 318 | "expected:%lu\n", KERN_ERR, |
Chao Yu | d284af4 | 2022-03-16 18:20:00 +0800 | [diff] [blame] | 319 | F2FS_I_SB(dic->inode)->sb->s_id, ret, |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 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 | { |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 339 | zstd_parameters params; |
| 340 | zstd_cstream *stream; |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 341 | void *workspace; |
| 342 | unsigned int workspace_size; |
Chao Yu | 3fde13f | 2021-01-22 17:46:43 +0800 | [diff] [blame] | 343 | unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> |
| 344 | COMPRESS_LEVEL_OFFSET; |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 345 | |
Chao Yu | 3fde13f | 2021-01-22 17:46:43 +0800 | [diff] [blame] | 346 | if (!level) |
| 347 | level = F2FS_ZSTD_DEFAULT_CLEVEL; |
| 348 | |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 349 | params = zstd_get_params(F2FS_ZSTD_DEFAULT_CLEVEL, cc->rlen); |
| 350 | workspace_size = zstd_cstream_workspace_bound(¶ms.cParams); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 351 | |
| 352 | workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode), |
| 353 | workspace_size, GFP_NOFS); |
| 354 | if (!workspace) |
| 355 | return -ENOMEM; |
| 356 | |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 357 | stream = zstd_init_cstream(¶ms, 0, workspace, workspace_size); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 358 | if (!stream) { |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 359 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_cstream failed\n", |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 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 | { |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 382 | zstd_cstream *stream = cc->private2; |
| 383 | zstd_in_buffer inbuf; |
| 384 | zstd_out_buffer outbuf; |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 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 | |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 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", |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 400 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 401 | __func__, zstd_get_error_code(ret)); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 402 | return -EIO; |
| 403 | } |
| 404 | |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 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", |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 408 | KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 409 | __func__, zstd_get_error_code(ret)); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 410 | return -EIO; |
| 411 | } |
| 412 | |
Chao Yu | 1454c97 | 2020-05-08 09:16:03 +0800 | [diff] [blame] | 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 | |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 420 | cc->clen = outbuf.pos; |
| 421 | return 0; |
| 422 | } |
| 423 | |
| 424 | static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic) |
| 425 | { |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 426 | zstd_dstream *stream; |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 427 | void *workspace; |
| 428 | unsigned int workspace_size; |
Chao Yu | 0e2b738 | 2020-09-02 15:01:52 +0800 | [diff] [blame] | 429 | unsigned int max_window_size = |
| 430 | MAX_COMPRESS_WINDOW_SIZE(dic->log_cluster_size); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 431 | |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 432 | workspace_size = zstd_dstream_workspace_bound(max_window_size); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 433 | |
| 434 | workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode), |
| 435 | workspace_size, GFP_NOFS); |
| 436 | if (!workspace) |
| 437 | return -ENOMEM; |
| 438 | |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 439 | stream = zstd_init_dstream(max_window_size, workspace, workspace_size); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 440 | if (!stream) { |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 441 | printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_dstream failed\n", |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 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 | { |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 463 | zstd_dstream *stream = dic->private2; |
| 464 | zstd_in_buffer inbuf; |
| 465 | zstd_out_buffer outbuf; |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 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 | |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 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", |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 479 | KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, |
Nick Terrell | cf30f6a | 2020-09-11 16:49:00 -0700 | [diff] [blame] | 480 | __func__, zstd_get_error_code(ret)); |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 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 | |
Chao Yu | 6d92b20 | 2020-04-08 19:56:32 +0800 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 |
Chao Yu | 50cfa66 | 2020-03-03 17:46:02 +0800 | [diff] [blame] | 542 | #ifdef CONFIG_F2FS_FS_ZSTD |
| 543 | &f2fs_zstd_ops, |
| 544 | #else |
| 545 | NULL, |
| 546 | #endif |
Chao Yu | 6d92b20 | 2020-04-08 19:56:32 +0800 | [diff] [blame] | 547 | #if defined(CONFIG_F2FS_FS_LZO) && defined(CONFIG_F2FS_FS_LZORLE) |
| 548 | &f2fs_lzorle_ops, |
| 549 | #else |
| 550 | NULL, |
| 551 | #endif |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Jaegeuk Kim | 99bbe30 | 2020-06-16 09:56:51 -0700 | [diff] [blame] | 561 | static mempool_t *compress_page_pool; |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 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) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 582 | { |
| 583 | struct page *page; |
| 584 | |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 585 | page = mempool_alloc(compress_page_pool, GFP_NOFS); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 586 | lock_page(page); |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 587 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 588 | return page; |
| 589 | } |
| 590 | |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 591 | static void f2fs_compress_free_page(struct page *page) |
| 592 | { |
| 593 | if (!page) |
| 594 | return; |
Chao Yu | b763f3b | 2021-04-28 17:20:31 +0800 | [diff] [blame] | 595 | detach_page_private(page); |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 596 | page->mapping = NULL; |
| 597 | unlock_page(page); |
| 598 | mempool_free(page, compress_page_pool); |
| 599 | } |
| 600 | |
Daeho Jeong | 6fcaeba | 2020-08-12 14:17:11 +0900 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 617 | static int f2fs_compress_pages(struct compress_ctx *cc) |
| 618 | { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 619 | struct f2fs_inode_info *fi = F2FS_I(cc->inode); |
| 620 | const struct f2fs_compress_ops *cops = |
| 621 | f2fs_cops[fi->i_compress_algorithm]; |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 622 | unsigned int max_len, new_nr_cpages; |
Chao Yu | b28f047 | 2020-11-26 18:32:09 +0800 | [diff] [blame] | 623 | u32 chksum = 0; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Chao Yu | 23b1faaad | 2020-03-03 16:57:07 +0800 | [diff] [blame] | 629 | if (cops->init_compress_ctx) { |
| 630 | ret = cops->init_compress_ctx(cc); |
| 631 | if (ret) |
| 632 | goto out; |
| 633 | } |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 634 | |
| 635 | max_len = COMPRESS_HEADER_SIZE + cc->clen; |
| 636 | cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE); |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 637 | cc->valid_nr_cpages = cc->nr_cpages; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 638 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 639 | cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 640 | if (!cc->cpages) { |
| 641 | ret = -ENOMEM; |
| 642 | goto destroy_compress_ctx; |
| 643 | } |
| 644 | |
| 645 | for (i = 0; i < cc->nr_cpages; i++) { |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 646 | cc->cpages[i] = f2fs_compress_alloc_page(); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 647 | if (!cc->cpages[i]) { |
| 648 | ret = -ENOMEM; |
| 649 | goto out_free_cpages; |
| 650 | } |
| 651 | } |
| 652 | |
Daeho Jeong | 6fcaeba | 2020-08-12 14:17:11 +0900 | [diff] [blame] | 653 | cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 654 | if (!cc->rbuf) { |
| 655 | ret = -ENOMEM; |
| 656 | goto out_free_cpages; |
| 657 | } |
| 658 | |
Daeho Jeong | 6fcaeba | 2020-08-12 14:17:11 +0900 | [diff] [blame] | 659 | cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 677 | |
Chao Yu | b28f047 | 2020-11-26 18:32:09 +0800 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 683 | for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++) |
| 684 | cc->cbuf->reserved[i] = cpu_to_le32(0); |
| 685 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 686 | new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE); |
| 687 | |
Eric Biggers | 7fa6d59 | 2020-02-20 20:50:37 -0800 | [diff] [blame] | 688 | /* zero out any unused part of the last page */ |
| 689 | memset(&cc->cbuf->cdata[cc->clen], 0, |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 690 | (new_nr_cpages * PAGE_SIZE) - |
| 691 | (cc->clen + COMPRESS_HEADER_SIZE)); |
Eric Biggers | 7fa6d59 | 2020-02-20 20:50:37 -0800 | [diff] [blame] | 692 | |
Daeho Jeong | 6fcaeba | 2020-08-12 14:17:11 +0900 | [diff] [blame] | 693 | vm_unmap_ram(cc->cbuf, cc->nr_cpages); |
| 694 | vm_unmap_ram(cc->rbuf, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 695 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 696 | for (i = 0; i < cc->nr_cpages; i++) { |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 697 | if (i < new_nr_cpages) |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 698 | continue; |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 699 | f2fs_compress_free_page(cc->cpages[i]); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 700 | cc->cpages[i] = NULL; |
| 701 | } |
| 702 | |
Chao Yu | 23b1faaad | 2020-03-03 16:57:07 +0800 | [diff] [blame] | 703 | if (cops->destroy_compress_ctx) |
| 704 | cops->destroy_compress_ctx(cc); |
Chao Yu | 09ff480 | 2020-03-03 16:57:06 +0800 | [diff] [blame] | 705 | |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 706 | cc->valid_nr_cpages = new_nr_cpages; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 707 | |
| 708 | trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, |
| 709 | cc->clen, ret); |
| 710 | return 0; |
| 711 | |
| 712 | out_vunmap_cbuf: |
Daeho Jeong | 6fcaeba | 2020-08-12 14:17:11 +0900 | [diff] [blame] | 713 | vm_unmap_ram(cc->cbuf, cc->nr_cpages); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 714 | out_vunmap_rbuf: |
Daeho Jeong | 6fcaeba | 2020-08-12 14:17:11 +0900 | [diff] [blame] | 715 | vm_unmap_ram(cc->rbuf, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 716 | out_free_cpages: |
| 717 | for (i = 0; i < cc->nr_cpages; i++) { |
| 718 | if (cc->cpages[i]) |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 719 | f2fs_compress_free_page(cc->cpages[i]); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 720 | } |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 721 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 722 | cc->cpages = NULL; |
| 723 | destroy_compress_ctx: |
Chao Yu | 23b1faaad | 2020-03-03 16:57:07 +0800 | [diff] [blame] | 724 | if (cops->destroy_compress_ctx) |
| 725 | cops->destroy_compress_ctx(cc); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 726 | out: |
| 727 | trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, |
| 728 | cc->clen, ret); |
| 729 | return ret; |
| 730 | } |
| 731 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 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) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 738 | { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 739 | struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 740 | struct f2fs_inode_info *fi = F2FS_I(dic->inode); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 741 | const struct f2fs_compress_ops *cops = |
| 742 | f2fs_cops[fi->i_compress_algorithm]; |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 743 | bool bypass_callback = false; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 744 | int ret; |
| 745 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 746 | trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx, |
| 747 | dic->cluster_size, fi->i_compress_algorithm); |
| 748 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 749 | if (dic->failed) { |
| 750 | ret = -EIO; |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 751 | goto out_end_io; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 752 | } |
| 753 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 754 | ret = f2fs_prepare_decomp_mem(dic, false); |
| 755 | if (ret) { |
| 756 | bypass_callback = true; |
| 757 | goto out_release; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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; |
Chao Yu | 95fa90c | 2022-09-28 23:38:54 +0800 | [diff] [blame] | 765 | f2fs_handle_error(sbi, ERROR_FAIL_DECOMPRESSION); |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 766 | goto out_release; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 767 | } |
| 768 | |
| 769 | ret = cops->decompress_pages(dic); |
| 770 | |
Chao Yu | 75e91c8 | 2020-12-09 16:42:14 +0800 | [diff] [blame] | 771 | if (!ret && (fi->i_compress_flag & 1 << COMPRESS_CHKSUM)) { |
Chao Yu | b28f047 | 2020-11-26 18:32:09 +0800 | [diff] [blame] | 772 | u32 provided = le32_to_cpu(dic->cbuf->chksum); |
| 773 | u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen); |
| 774 | |
| 775 | if (provided != calculated) { |
| 776 | if (!is_inode_flag_set(dic->inode, FI_COMPRESS_CORRUPT)) { |
| 777 | set_inode_flag(dic->inode, FI_COMPRESS_CORRUPT); |
| 778 | printk_ratelimited( |
| 779 | "%sF2FS-fs (%s): checksum invalid, nid = %lu, %x vs %x", |
| 780 | KERN_INFO, sbi->sb->s_id, dic->inode->i_ino, |
| 781 | provided, calculated); |
| 782 | } |
| 783 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
Chao Yu | b28f047 | 2020-11-26 18:32:09 +0800 | [diff] [blame] | 784 | } |
| 785 | } |
| 786 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 787 | out_release: |
| 788 | f2fs_release_decomp_mem(dic, bypass_callback, false); |
| 789 | |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 790 | out_end_io: |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 791 | trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx, |
| 792 | dic->clen, ret); |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 793 | f2fs_decompress_end_io(dic, ret, in_task); |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | /* |
| 797 | * This is called when a page of a compressed cluster has been read from disk |
| 798 | * (or failed to be read from disk). It checks whether this page was the last |
| 799 | * page being waited on in the cluster, and if so, it decompresses the cluster |
| 800 | * (or in the case of a failure, cleans up without actually decompressing). |
| 801 | */ |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 802 | void f2fs_end_read_compressed_page(struct page *page, bool failed, |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 803 | block_t blkaddr, bool in_task) |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 804 | { |
| 805 | struct decompress_io_ctx *dic = |
| 806 | (struct decompress_io_ctx *)page_private(page); |
| 807 | struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); |
| 808 | |
| 809 | dec_page_count(sbi, F2FS_RD_DATA); |
| 810 | |
| 811 | if (failed) |
| 812 | WRITE_ONCE(dic->failed, true); |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 813 | else if (blkaddr && in_task) |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 814 | f2fs_cache_compressed_page(sbi, page, |
| 815 | dic->inode->i_ino, blkaddr); |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 816 | |
| 817 | if (atomic_dec_and_test(&dic->remaining_pages)) |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 818 | f2fs_decompress_cluster(dic, in_task); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 819 | } |
| 820 | |
| 821 | static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) |
| 822 | { |
| 823 | if (cc->cluster_idx == NULL_CLUSTER) |
| 824 | return true; |
| 825 | return cc->cluster_idx == cluster_idx(cc, index); |
| 826 | } |
| 827 | |
| 828 | bool f2fs_cluster_is_empty(struct compress_ctx *cc) |
| 829 | { |
| 830 | return cc->nr_rpages == 0; |
| 831 | } |
| 832 | |
| 833 | static bool f2fs_cluster_is_full(struct compress_ctx *cc) |
| 834 | { |
| 835 | return cc->cluster_size == cc->nr_rpages; |
| 836 | } |
| 837 | |
| 838 | bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index) |
| 839 | { |
| 840 | if (f2fs_cluster_is_empty(cc)) |
| 841 | return true; |
| 842 | return is_page_in_cluster(cc, index); |
| 843 | } |
| 844 | |
Fengnan Chang | 01fc4b9 | 2022-07-31 11:33:46 +0800 | [diff] [blame] | 845 | bool f2fs_all_cluster_page_ready(struct compress_ctx *cc, struct page **pages, |
Fengnan Chang | 4f8219f | 2022-07-31 11:33:45 +0800 | [diff] [blame] | 846 | int index, int nr_pages, bool uptodate) |
Fengnan Chang | b368cc5 | 2021-10-22 20:08:00 -0700 | [diff] [blame] | 847 | { |
Fengnan Chang | 01fc4b9 | 2022-07-31 11:33:46 +0800 | [diff] [blame] | 848 | unsigned long pgidx = pages[index]->index; |
Fengnan Chang | 4f8219f | 2022-07-31 11:33:45 +0800 | [diff] [blame] | 849 | int i = uptodate ? 0 : 1; |
| 850 | |
| 851 | /* |
| 852 | * when uptodate set to true, try to check all pages in cluster is |
| 853 | * uptodate or not. |
| 854 | */ |
| 855 | if (uptodate && (pgidx % cc->cluster_size)) |
| 856 | return false; |
Fengnan Chang | b368cc5 | 2021-10-22 20:08:00 -0700 | [diff] [blame] | 857 | |
| 858 | if (nr_pages - index < cc->cluster_size) |
| 859 | return false; |
| 860 | |
Fengnan Chang | 4f8219f | 2022-07-31 11:33:45 +0800 | [diff] [blame] | 861 | for (; i < cc->cluster_size; i++) { |
Fengnan Chang | 01fc4b9 | 2022-07-31 11:33:46 +0800 | [diff] [blame] | 862 | if (pages[index + i]->index != pgidx + i) |
Fengnan Chang | b368cc5 | 2021-10-22 20:08:00 -0700 | [diff] [blame] | 863 | return false; |
Fengnan Chang | 01fc4b9 | 2022-07-31 11:33:46 +0800 | [diff] [blame] | 864 | if (uptodate && !PageUptodate(pages[index + i])) |
Fengnan Chang | b368cc5 | 2021-10-22 20:08:00 -0700 | [diff] [blame] | 865 | return false; |
| 866 | } |
| 867 | |
| 868 | return true; |
| 869 | } |
| 870 | |
Chao Yu | 5db479f | 2021-04-27 11:07:30 +0800 | [diff] [blame] | 871 | static bool cluster_has_invalid_data(struct compress_ctx *cc) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 872 | { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 873 | loff_t i_size = i_size_read(cc->inode); |
| 874 | unsigned nr_pages = DIV_ROUND_UP(i_size, PAGE_SIZE); |
| 875 | int i; |
| 876 | |
| 877 | for (i = 0; i < cc->cluster_size; i++) { |
| 878 | struct page *page = cc->rpages[i]; |
| 879 | |
Chao Yu | 8af85f7 | 2021-04-21 16:39:41 +0800 | [diff] [blame] | 880 | f2fs_bug_on(F2FS_I_SB(cc->inode), !page); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 881 | |
| 882 | /* beyond EOF */ |
| 883 | if (page->index >= nr_pages) |
Chao Yu | 5db479f | 2021-04-27 11:07:30 +0800 | [diff] [blame] | 884 | return true; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 885 | } |
Chao Yu | 5db479f | 2021-04-27 11:07:30 +0800 | [diff] [blame] | 886 | return false; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 887 | } |
| 888 | |
Chao Yu | bbe1da7 | 2021-08-06 08:02:50 +0800 | [diff] [blame] | 889 | bool f2fs_sanity_check_cluster(struct dnode_of_data *dn) |
| 890 | { |
| 891 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
| 892 | unsigned int cluster_size = F2FS_I(dn->inode)->i_cluster_size; |
| 893 | bool compressed = dn->data_blkaddr == COMPRESS_ADDR; |
| 894 | int cluster_end = 0; |
| 895 | int i; |
| 896 | char *reason = ""; |
| 897 | |
| 898 | if (!compressed) |
| 899 | return false; |
| 900 | |
| 901 | /* [..., COMPR_ADDR, ...] */ |
| 902 | if (dn->ofs_in_node % cluster_size) { |
| 903 | reason = "[*|C|*|*]"; |
| 904 | goto out; |
| 905 | } |
| 906 | |
| 907 | for (i = 1; i < cluster_size; i++) { |
| 908 | block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, |
| 909 | dn->ofs_in_node + i); |
| 910 | |
| 911 | /* [COMPR_ADDR, ..., COMPR_ADDR] */ |
| 912 | if (blkaddr == COMPRESS_ADDR) { |
| 913 | reason = "[C|*|C|*]"; |
| 914 | goto out; |
| 915 | } |
Zhang Qilong | 9df6d6f | 2022-09-01 15:19:37 +0800 | [diff] [blame] | 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; |
Chao Yu | bbe1da7 | 2021-08-06 08:02:50 +0800 | [diff] [blame] | 925 | } |
| 926 | } |
| 927 | return false; |
| 928 | out: |
| 929 | f2fs_warn(sbi, "access invalid cluster, ino:%lu, nid:%u, ofs_in_node:%u, reason:%s", |
| 930 | dn->inode->i_ino, dn->nid, dn->ofs_in_node, reason); |
| 931 | set_sbi_flag(sbi, SBI_NEED_FSCK); |
| 932 | return true; |
| 933 | } |
| 934 | |
Chao Yu | 91f0fb6 | 2021-05-12 17:52:57 +0800 | [diff] [blame] | 935 | static int __f2fs_cluster_blocks(struct inode *inode, |
| 936 | unsigned int cluster_idx, bool compr) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 937 | { |
| 938 | struct dnode_of_data dn; |
Chao Yu | 91f0fb6 | 2021-05-12 17:52:57 +0800 | [diff] [blame] | 939 | unsigned int cluster_size = F2FS_I(inode)->i_cluster_size; |
| 940 | unsigned int start_idx = cluster_idx << |
| 941 | F2FS_I(inode)->i_log_cluster_size; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 942 | int ret; |
| 943 | |
Chao Yu | 91f0fb6 | 2021-05-12 17:52:57 +0800 | [diff] [blame] | 944 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
| 945 | ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 946 | if (ret) { |
| 947 | if (ret == -ENOENT) |
| 948 | ret = 0; |
| 949 | goto fail; |
| 950 | } |
| 951 | |
Chao Yu | bbe1da7 | 2021-08-06 08:02:50 +0800 | [diff] [blame] | 952 | if (f2fs_sanity_check_cluster(&dn)) { |
| 953 | ret = -EFSCORRUPTED; |
Chao Yu | 95fa90c | 2022-09-28 23:38:54 +0800 | [diff] [blame] | 954 | f2fs_handle_error(F2FS_I_SB(inode), ERROR_CORRUPTED_CLUSTER); |
Chao Yu | bbe1da7 | 2021-08-06 08:02:50 +0800 | [diff] [blame] | 955 | goto fail; |
| 956 | } |
| 957 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 958 | if (dn.data_blkaddr == COMPRESS_ADDR) { |
| 959 | int i; |
| 960 | |
| 961 | ret = 1; |
Chao Yu | 91f0fb6 | 2021-05-12 17:52:57 +0800 | [diff] [blame] | 962 | for (i = 1; i < cluster_size; i++) { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 963 | block_t blkaddr; |
| 964 | |
Chao Yu | a2ced1c | 2020-02-14 17:44:10 +0800 | [diff] [blame] | 965 | blkaddr = data_blkaddr(dn.inode, |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 966 | dn.node_page, dn.ofs_in_node + i); |
Chao Yu | 1a67cbe | 2020-03-12 10:45:29 +0800 | [diff] [blame] | 967 | if (compr) { |
| 968 | if (__is_valid_data_blkaddr(blkaddr)) |
| 969 | ret++; |
| 970 | } else { |
| 971 | if (blkaddr != NULL_ADDR) |
| 972 | ret++; |
| 973 | } |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 974 | } |
Chao Yu | 8f1d498 | 2021-05-12 17:52:58 +0800 | [diff] [blame] | 975 | |
| 976 | f2fs_bug_on(F2FS_I_SB(inode), |
Jaegeuk Kim | c614041 | 2021-05-25 11:39:35 -0700 | [diff] [blame] | 977 | !compr && ret != cluster_size && |
| 978 | !is_inode_flag_set(inode, FI_COMPRESS_RELEASED)); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 979 | } |
| 980 | fail: |
| 981 | f2fs_put_dnode(&dn); |
| 982 | return ret; |
| 983 | } |
| 984 | |
Chao Yu | 1a67cbe | 2020-03-12 10:45:29 +0800 | [diff] [blame] | 985 | /* return # of compressed blocks in compressed cluster */ |
| 986 | static int f2fs_compressed_blocks(struct compress_ctx *cc) |
| 987 | { |
Chao Yu | 91f0fb6 | 2021-05-12 17:52:57 +0800 | [diff] [blame] | 988 | return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true); |
Chao Yu | 1a67cbe | 2020-03-12 10:45:29 +0800 | [diff] [blame] | 989 | } |
| 990 | |
| 991 | /* return # of valid blocks in compressed cluster */ |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 992 | int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index) |
| 993 | { |
Chao Yu | 91f0fb6 | 2021-05-12 17:52:57 +0800 | [diff] [blame] | 994 | return __f2fs_cluster_blocks(inode, |
| 995 | index >> F2FS_I(inode)->i_log_cluster_size, |
| 996 | false); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 997 | } |
| 998 | |
| 999 | static bool cluster_may_compress(struct compress_ctx *cc) |
| 1000 | { |
Daeho Jeong | 602a16d | 2020-12-01 13:08:02 +0900 | [diff] [blame] | 1001 | if (!f2fs_need_compress_data(cc->inode)) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1002 | return false; |
| 1003 | if (f2fs_is_atomic_file(cc->inode)) |
| 1004 | return false; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1005 | if (!f2fs_cluster_is_full(cc)) |
| 1006 | return false; |
Chao Yu | dc35d73 | 2020-05-26 09:55:02 +0800 | [diff] [blame] | 1007 | if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode)))) |
| 1008 | return false; |
Chao Yu | 5db479f | 2021-04-27 11:07:30 +0800 | [diff] [blame] | 1009 | return !cluster_has_invalid_data(cc); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1041 | |
| 1042 | retry: |
Chao Yu | 91f0fb6 | 2021-05-12 17:52:57 +0800 | [diff] [blame] | 1043 | ret = f2fs_is_compressed_cluster(cc->inode, start_idx); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1044 | if (ret <= 0) |
| 1045 | return ret; |
| 1046 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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)) |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1061 | f2fs_put_page(page, 1); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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, |
Chao Yu | 0683728 | 2020-02-18 18:21:35 +0800 | [diff] [blame] | 1070 | &last_block_in_bio, false, true); |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1071 | f2fs_put_rpages(cc); |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 1072 | f2fs_destroy_compress_ctx(cc, true); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1073 | if (ret) |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1074 | goto out; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1075 | if (bio) |
| 1076 | f2fs_submit_bio(sbi, bio, DATA); |
| 1077 | |
| 1078 | ret = f2fs_init_compress_ctx(cc); |
| 1079 | if (ret) |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1080 | goto out; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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); |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1087 | if (!page) { |
| 1088 | /* page can be truncated */ |
| 1089 | goto release_and_retry; |
| 1090 | } |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1091 | |
| 1092 | f2fs_wait_on_page_writeback(page, DATA, true, true); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1093 | f2fs_compress_ctx_add_page(cc, page); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1094 | |
| 1095 | if (!PageUptodate(page)) { |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1096 | release_and_retry: |
| 1097 | f2fs_put_rpages(cc); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1098 | f2fs_unlock_rpages(cc, i + 1); |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 1099 | f2fs_destroy_compress_ctx(cc, true); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1100 | goto retry; |
| 1101 | } |
| 1102 | } |
| 1103 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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: |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1111 | f2fs_put_rpages(cc); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1112 | f2fs_unlock_rpages(cc, i); |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 1113 | f2fs_destroy_compress_ctx(cc, true); |
Chao Yu | a949dc5 | 2021-05-10 17:30:31 +0800 | [diff] [blame] | 1114 | out: |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 = { |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1138 | .inode = inode, |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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); |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 1149 | f2fs_destroy_compress_ctx(&cc, false); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1150 | |
| 1151 | return first_index; |
| 1152 | } |
| 1153 | |
Chao Yu | 3265d3d | 2020-03-18 16:22:59 +0800 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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, |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1222 | .io_type = io_type, |
| 1223 | .io_wbc = wbc, |
Satya Tangirala | 27aacd2 | 2020-07-02 01:56:06 +0000 | [diff] [blame] | 1224 | .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode), |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Chao Yu | ee68d27 | 2021-04-27 11:07:30 +0800 | [diff] [blame] | 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 | |
Chao Yu | 79963d9 | 2020-06-18 14:36:23 +0800 | [diff] [blame] | 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 | */ |
Tim Murray | e4544b6 | 2022-01-07 12:48:44 -0800 | [diff] [blame] | 1246 | f2fs_down_read(&sbi->node_write); |
Chao Yu | 79963d9 | 2020-06-18 14:36:23 +0800 | [diff] [blame] | 1247 | } else if (!f2fs_trylock_op(sbi)) { |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1248 | goto out_free; |
Chao Yu | 79963d9 | 2020-06-18 14:36:23 +0800 | [diff] [blame] | 1249 | } |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1250 | |
Chao Yu | df77fbd | 2020-02-24 19:20:16 +0800 | [diff] [blame] | 1251 | set_new_dnode(&dn, cc->inode, NULL, NULL, 0); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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++) { |
Chao Yu | a2ced1c | 2020-02-14 17:44:10 +0800 | [diff] [blame] | 1258 | if (data_blkaddr(dn.inode, dn.node_page, |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Jaegeuk Kim | a9419b6 | 2021-12-13 14:16:32 -0800 | [diff] [blame] | 1265 | err = f2fs_get_node_info(fio.sbi, dn.nid, &ni, false); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1266 | if (err) |
| 1267 | goto out_put_dnode; |
| 1268 | |
| 1269 | fio.version = ni.version; |
| 1270 | |
Chao Yu | 3241057 | 2021-08-09 08:24:48 +0800 | [diff] [blame] | 1271 | cic = f2fs_kmem_cache_alloc(cic_entry_slab, GFP_F2FS_ZERO, false, sbi); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1272 | if (!cic) |
| 1273 | goto out_put_dnode; |
| 1274 | |
| 1275 | cic->magic = F2FS_COMPRESSED_PAGE_MAGIC; |
| 1276 | cic->inode = inode; |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 1277 | atomic_set(&cic->pending_pages, cc->valid_nr_cpages); |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1278 | cic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1279 | if (!cic->rpages) |
| 1280 | goto out_put_cic; |
| 1281 | |
| 1282 | cic->nr_rpages = cc->cluster_size; |
| 1283 | |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 1284 | for (i = 0; i < cc->valid_nr_cpages; i++) { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1285 | f2fs_set_compressed_page(cc->cpages[i], inode, |
Chao Yu | 887347a | 2020-03-28 17:33:23 +0800 | [diff] [blame] | 1286 | cc->rpages[i + 1]->index, cic); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1287 | fio.compressed_page = cc->cpages[i]; |
Chao Yu | f567adb | 2020-07-03 16:40:11 +0800 | [diff] [blame] | 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 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Chao Yu | a2ced1c | 2020-02-14 17:44:10 +0800 | [diff] [blame] | 1312 | blkaddr = f2fs_data_blkaddr(&dn); |
Chao Yu | 95978ca | 2020-02-28 18:08:46 +0800 | [diff] [blame] | 1313 | fio.page = cc->rpages[i]; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 1329 | if (i > cc->valid_nr_cpages) { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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); |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 1354 | f2fs_i_compr_blocks_update(inode, cc->valid_nr_cpages, true); |
| 1355 | add_compr_block_stat(inode, cc->valid_nr_cpages); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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); |
Chao Yu | 79963d9 | 2020-06-18 14:36:23 +0800 | [diff] [blame] | 1362 | if (IS_NOQUOTA(inode)) |
Tim Murray | e4544b6 | 2022-01-07 12:48:44 -0800 | [diff] [blame] | 1363 | f2fs_up_read(&sbi->node_write); |
Chao Yu | 79963d9 | 2020-06-18 14:36:23 +0800 | [diff] [blame] | 1364 | else |
Jaegeuk Kim | 435cbab | 2020-04-09 10:25:21 -0700 | [diff] [blame] | 1365 | f2fs_unlock_op(sbi); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1366 | |
Chao Yu | c10c982 | 2020-02-27 19:30:03 +0800 | [diff] [blame] | 1367 | spin_lock(&fi->i_size_lock); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1368 | if (fi->last_disk_size < psize) |
| 1369 | fi->last_disk_size = psize; |
Chao Yu | c10c982 | 2020-02-27 19:30:03 +0800 | [diff] [blame] | 1370 | spin_unlock(&fi->i_size_lock); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1371 | |
| 1372 | f2fs_put_rpages(cc); |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1373 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
| 1374 | cc->cpages = NULL; |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 1375 | f2fs_destroy_compress_ctx(cc, false); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1376 | return 0; |
| 1377 | |
| 1378 | out_destroy_crypt: |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1379 | page_array_free(cc->inode, cic->rpages, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1380 | |
| 1381 | for (--i; i >= 0; i--) |
| 1382 | fscrypt_finalize_bounce_page(&cc->cpages[i]); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1383 | out_put_cic: |
Chao Yu | c68d6c8 | 2020-09-14 17:05:14 +0800 | [diff] [blame] | 1384 | kmem_cache_free(cic_entry_slab, cic); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1385 | out_put_dnode: |
| 1386 | f2fs_put_dnode(&dn); |
| 1387 | out_unlock_op: |
Chao Yu | 79963d9 | 2020-06-18 14:36:23 +0800 | [diff] [blame] | 1388 | if (IS_NOQUOTA(inode)) |
Tim Murray | e4544b6 | 2022-01-07 12:48:44 -0800 | [diff] [blame] | 1389 | f2fs_up_read(&sbi->node_write); |
Chao Yu | 79963d9 | 2020-06-18 14:36:23 +0800 | [diff] [blame] | 1390 | else |
Jaegeuk Kim | 435cbab | 2020-04-09 10:25:21 -0700 | [diff] [blame] | 1391 | f2fs_unlock_op(sbi); |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1392 | out_free: |
Fengnan Chang | 3271d7e | 2021-11-10 10:37:13 +0800 | [diff] [blame] | 1393 | for (i = 0; i < cc->valid_nr_cpages; i++) { |
Jaegeuk Kim | 827f028 | 2021-08-30 11:37:32 -0700 | [diff] [blame] | 1394 | f2fs_compress_free_page(cc->cpages[i]); |
| 1395 | cc->cpages[i] = NULL; |
| 1396 | } |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1397 | page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
| 1398 | cc->cpages = NULL; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 1412 | f2fs_compress_free_page(page); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1413 | |
| 1414 | dec_page_count(sbi, F2FS_WB_DATA); |
| 1415 | |
Chao Yu | e6c3948 | 2020-08-10 18:39:30 +0800 | [diff] [blame] | 1416 | if (atomic_dec_return(&cic->pending_pages)) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1417 | return; |
| 1418 | |
| 1419 | for (i = 0; i < cic->nr_rpages; i++) { |
| 1420 | WARN_ON(!cic->rpages[i]); |
Chao Yu | b763f3b | 2021-04-28 17:20:31 +0800 | [diff] [blame] | 1421 | clear_page_private_gcing(cic->rpages[i]); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1422 | end_page_writeback(cic->rpages[i]); |
| 1423 | } |
| 1424 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1425 | page_array_free(cic->inode, cic->rpages, cic->nr_rpages); |
Chao Yu | c68d6c8 | 2020-09-14 17:05:14 +0800 | [diff] [blame] | 1426 | kmem_cache_free(cic_entry_slab, cic); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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; |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 1435 | int _submitted, compr_blocks, ret, i; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1436 | |
| 1437 | compr_blocks = f2fs_compressed_blocks(cc); |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 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]); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1445 | } |
| 1446 | |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 1447 | if (compr_blocks < 0) |
| 1448 | return compr_blocks; |
| 1449 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1450 | for (i = 0; i < cc->cluster_size; i++) { |
| 1451 | if (!cc->rpages[i]) |
| 1452 | continue; |
| 1453 | retry_write: |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 1454 | lock_page(cc->rpages[i]); |
| 1455 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1456 | if (cc->rpages[i]->mapping != mapping) { |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 1457 | continue_unlock: |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1458 | unlock_page(cc->rpages[i]); |
| 1459 | continue; |
| 1460 | } |
| 1461 | |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 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; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1467 | |
| 1468 | ret = f2fs_write_single_data_page(cc->rpages[i], &_submitted, |
| 1469 | NULL, NULL, wbc, io_type, |
Chao Yu | 3afae09 | 2021-01-11 17:42:53 +0800 | [diff] [blame] | 1470 | compr_blocks, false); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1471 | if (ret) { |
| 1472 | if (ret == AOP_WRITEPAGE_ACTIVATE) { |
| 1473 | unlock_page(cc->rpages[i]); |
| 1474 | ret = 0; |
| 1475 | } else if (ret == -EAGAIN) { |
Chao Yu | 466357d | 2020-03-20 18:14:31 +0800 | [diff] [blame] | 1476 | /* |
| 1477 | * for quota file, just redirty left pages to |
| 1478 | * avoid deadlock caused by cluster update race |
| 1479 | * from foreground operation. |
| 1480 | */ |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 1481 | if (IS_NOQUOTA(cc->inode)) |
| 1482 | return 0; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1483 | ret = 0; |
NeilBrown | a64239d | 2022-03-22 14:39:13 -0700 | [diff] [blame] | 1484 | f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1485 | goto retry_write; |
| 1486 | } |
Hyeong-Jun Kim | 7377e85 | 2021-12-10 13:30:12 +0900 | [diff] [blame] | 1487 | return ret; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1488 | } |
| 1489 | |
| 1490 | *submitted += _submitted; |
| 1491 | } |
Chao Yu | 3afae09 | 2021-01-11 17:42:53 +0800 | [diff] [blame] | 1492 | |
| 1493 | f2fs_balance_fs(F2FS_M_SB(mapping), true); |
| 1494 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1495 | return 0; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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 | { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1503 | int err; |
| 1504 | |
| 1505 | *submitted = 0; |
| 1506 | if (cluster_may_compress(cc)) { |
| 1507 | err = f2fs_compress_pages(cc); |
| 1508 | if (err == -EAGAIN) { |
Daeho Jeong | 09631cf | 2021-10-06 10:49:10 -0700 | [diff] [blame] | 1509 | add_compr_block_stat(cc->inode, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 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: |
Chao Yu | 8bfbfb0 | 2021-05-10 17:30:32 +0800 | [diff] [blame] | 1528 | f2fs_destroy_compress_ctx(cc, false); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1529 | return err; |
| 1530 | } |
| 1531 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 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 | |
Zhang Qilong | 8140654 | 2022-08-23 19:20:22 +0800 | [diff] [blame] | 1571 | if (cops->init_decompress_ctx) |
| 1572 | return cops->init_decompress_ctx(dic); |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1573 | |
| 1574 | return 0; |
| 1575 | } |
| 1576 | |
| 1577 | static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, |
| 1578 | bool bypass_destroy_callback, bool pre_alloc) |
| 1579 | { |
| 1580 | const struct f2fs_compress_ops *cops = |
| 1581 | f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; |
| 1582 | |
| 1583 | if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) |
| 1584 | return; |
| 1585 | |
| 1586 | if (!bypass_destroy_callback && cops->destroy_decompress_ctx) |
| 1587 | cops->destroy_decompress_ctx(dic); |
| 1588 | |
| 1589 | if (dic->cbuf) |
| 1590 | vm_unmap_ram(dic->cbuf, dic->nr_cpages); |
| 1591 | |
| 1592 | if (dic->rbuf) |
| 1593 | vm_unmap_ram(dic->rbuf, dic->cluster_size); |
| 1594 | } |
| 1595 | |
| 1596 | static void f2fs_free_dic(struct decompress_io_ctx *dic, |
| 1597 | bool bypass_destroy_callback); |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1598 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1599 | struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) |
| 1600 | { |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1601 | struct decompress_io_ctx *dic; |
| 1602 | pgoff_t start_idx = start_idx_of_cluster(cc); |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1603 | struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); |
| 1604 | int i, ret; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1605 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1606 | dic = f2fs_kmem_cache_alloc(dic_entry_slab, GFP_F2FS_ZERO, false, sbi); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1607 | if (!dic) |
| 1608 | return ERR_PTR(-ENOMEM); |
| 1609 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1610 | dic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1611 | if (!dic->rpages) { |
Chao Yu | c68d6c8 | 2020-09-14 17:05:14 +0800 | [diff] [blame] | 1612 | kmem_cache_free(dic_entry_slab, dic); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1613 | return ERR_PTR(-ENOMEM); |
| 1614 | } |
| 1615 | |
| 1616 | dic->magic = F2FS_COMPRESSED_PAGE_MAGIC; |
| 1617 | dic->inode = cc->inode; |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1618 | atomic_set(&dic->remaining_pages, cc->nr_cpages); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1619 | dic->cluster_idx = cc->cluster_idx; |
| 1620 | dic->cluster_size = cc->cluster_size; |
| 1621 | dic->log_cluster_size = cc->log_cluster_size; |
| 1622 | dic->nr_cpages = cc->nr_cpages; |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1623 | refcount_set(&dic->refcnt, 1); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1624 | dic->failed = false; |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1625 | dic->need_verity = f2fs_need_verity(cc->inode, start_idx); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1626 | |
| 1627 | for (i = 0; i < dic->cluster_size; i++) |
| 1628 | dic->rpages[i] = cc->rpages[i]; |
| 1629 | dic->nr_rpages = cc->cluster_size; |
| 1630 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1631 | dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages); |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1632 | if (!dic->cpages) { |
| 1633 | ret = -ENOMEM; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1634 | goto out_free; |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1635 | } |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1636 | |
| 1637 | for (i = 0; i < dic->nr_cpages; i++) { |
| 1638 | struct page *page; |
| 1639 | |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 1640 | page = f2fs_compress_alloc_page(); |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1641 | if (!page) { |
| 1642 | ret = -ENOMEM; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1643 | goto out_free; |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1644 | } |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1645 | |
| 1646 | f2fs_set_compressed_page(page, cc->inode, |
Chao Yu | 887347a | 2020-03-28 17:33:23 +0800 | [diff] [blame] | 1647 | start_idx + i + 1, dic); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1648 | dic->cpages[i] = page; |
| 1649 | } |
| 1650 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1651 | ret = f2fs_prepare_decomp_mem(dic, true); |
| 1652 | if (ret) |
| 1653 | goto out_free; |
| 1654 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1655 | return dic; |
| 1656 | |
| 1657 | out_free: |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1658 | f2fs_free_dic(dic, true); |
| 1659 | return ERR_PTR(ret); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1660 | } |
| 1661 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1662 | static void f2fs_free_dic(struct decompress_io_ctx *dic, |
| 1663 | bool bypass_destroy_callback) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1664 | { |
| 1665 | int i; |
| 1666 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1667 | f2fs_release_decomp_mem(dic, bypass_destroy_callback, true); |
| 1668 | |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1669 | if (dic->tpages) { |
| 1670 | for (i = 0; i < dic->cluster_size; i++) { |
| 1671 | if (dic->rpages[i]) |
| 1672 | continue; |
Chao Yu | 8908e75 | 2020-03-26 17:42:26 +0800 | [diff] [blame] | 1673 | if (!dic->tpages[i]) |
| 1674 | continue; |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 1675 | f2fs_compress_free_page(dic->tpages[i]); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1676 | } |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1677 | page_array_free(dic->inode, dic->tpages, dic->cluster_size); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1678 | } |
| 1679 | |
| 1680 | if (dic->cpages) { |
| 1681 | for (i = 0; i < dic->nr_cpages; i++) { |
| 1682 | if (!dic->cpages[i]) |
| 1683 | continue; |
Chao Yu | 5e6bbde | 2020-04-08 19:56:05 +0800 | [diff] [blame] | 1684 | f2fs_compress_free_page(dic->cpages[i]); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1685 | } |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1686 | page_array_free(dic->inode, dic->cpages, dic->nr_cpages); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1687 | } |
| 1688 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1689 | page_array_free(dic->inode, dic->rpages, dic->nr_rpages); |
Chao Yu | c68d6c8 | 2020-09-14 17:05:14 +0800 | [diff] [blame] | 1690 | kmem_cache_free(dic_entry_slab, dic); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1691 | } |
| 1692 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1693 | static void f2fs_late_free_dic(struct work_struct *work) |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1694 | { |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1695 | struct decompress_io_ctx *dic = |
| 1696 | container_of(work, struct decompress_io_ctx, free_work); |
| 1697 | |
| 1698 | f2fs_free_dic(dic, false); |
| 1699 | } |
| 1700 | |
| 1701 | static void f2fs_put_dic(struct decompress_io_ctx *dic, bool in_task) |
| 1702 | { |
| 1703 | if (refcount_dec_and_test(&dic->refcnt)) { |
| 1704 | if (in_task) { |
| 1705 | f2fs_free_dic(dic, false); |
| 1706 | } else { |
| 1707 | INIT_WORK(&dic->free_work, f2fs_late_free_dic); |
| 1708 | queue_work(F2FS_I_SB(dic->inode)->post_read_wq, |
| 1709 | &dic->free_work); |
| 1710 | } |
| 1711 | } |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1712 | } |
| 1713 | |
| 1714 | /* |
| 1715 | * Update and unlock the cluster's pagecache pages, and release the reference to |
| 1716 | * the decompress_io_ctx that was being held for I/O completion. |
| 1717 | */ |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1718 | static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, |
| 1719 | bool in_task) |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1720 | { |
| 1721 | int i; |
| 1722 | |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1723 | for (i = 0; i < dic->cluster_size; i++) { |
| 1724 | struct page *rpage = dic->rpages[i]; |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1725 | |
| 1726 | if (!rpage) |
| 1727 | continue; |
| 1728 | |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1729 | /* PG_error was set if verity failed. */ |
| 1730 | if (failed || PageError(rpage)) { |
| 1731 | ClearPageUptodate(rpage); |
| 1732 | /* will re-read again later */ |
| 1733 | ClearPageError(rpage); |
| 1734 | } else { |
Chao Yu | 23c51be | 2020-03-21 20:24:11 +0800 | [diff] [blame] | 1735 | SetPageUptodate(rpage); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1736 | } |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1737 | unlock_page(rpage); |
| 1738 | } |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1739 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1740 | f2fs_put_dic(dic, in_task); |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1741 | } |
| 1742 | |
| 1743 | static void f2fs_verify_cluster(struct work_struct *work) |
| 1744 | { |
| 1745 | struct decompress_io_ctx *dic = |
| 1746 | container_of(work, struct decompress_io_ctx, verity_work); |
| 1747 | int i; |
| 1748 | |
| 1749 | /* Verify the cluster's decompressed pages with fs-verity. */ |
| 1750 | for (i = 0; i < dic->cluster_size; i++) { |
| 1751 | struct page *rpage = dic->rpages[i]; |
| 1752 | |
| 1753 | if (rpage && !fsverity_verify_page(rpage)) |
| 1754 | SetPageError(rpage); |
| 1755 | } |
| 1756 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1757 | __f2fs_decompress_end_io(dic, false, true); |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1758 | } |
| 1759 | |
| 1760 | /* |
| 1761 | * This is called when a compressed cluster has been decompressed |
| 1762 | * (or failed to be read and/or decompressed). |
| 1763 | */ |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1764 | void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, |
| 1765 | bool in_task) |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1766 | { |
| 1767 | if (!failed && dic->need_verity) { |
| 1768 | /* |
| 1769 | * Note that to avoid deadlocks, the verity work can't be done |
| 1770 | * on the decompression workqueue. This is because verifying |
| 1771 | * the data pages can involve reading metadata pages from the |
| 1772 | * file, and these metadata pages may be compressed. |
| 1773 | */ |
| 1774 | INIT_WORK(&dic->verity_work, f2fs_verify_cluster); |
| 1775 | fsverity_enqueue_verify_work(&dic->verity_work); |
| 1776 | } else { |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1777 | __f2fs_decompress_end_io(dic, failed, in_task); |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1778 | } |
| 1779 | } |
| 1780 | |
| 1781 | /* |
| 1782 | * Put a reference to a compressed page's decompress_io_ctx. |
| 1783 | * |
| 1784 | * This is called when the page is no longer needed and can be freed. |
| 1785 | */ |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1786 | void f2fs_put_page_dic(struct page *page, bool in_task) |
Eric Biggers | 7f59b27 | 2021-01-04 22:33:02 -0800 | [diff] [blame] | 1787 | { |
| 1788 | struct decompress_io_ctx *dic = |
| 1789 | (struct decompress_io_ctx *)page_private(page); |
| 1790 | |
Daeho Jeong | bff139b | 2022-08-02 12:24:37 -0700 | [diff] [blame] | 1791 | f2fs_put_dic(dic, in_task); |
Chao Yu | 4c8ff70 | 2019-11-01 18:07:14 +0800 | [diff] [blame] | 1792 | } |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1793 | |
Chao Yu | 94afd6d | 2021-08-04 10:23:48 +0800 | [diff] [blame] | 1794 | /* |
| 1795 | * check whether cluster blocks are contiguous, and add extent cache entry |
| 1796 | * only if cluster blocks are logically and physically contiguous. |
| 1797 | */ |
| 1798 | unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn) |
| 1799 | { |
| 1800 | bool compressed = f2fs_data_blkaddr(dn) == COMPRESS_ADDR; |
| 1801 | int i = compressed ? 1 : 0; |
| 1802 | block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page, |
| 1803 | dn->ofs_in_node + i); |
| 1804 | |
| 1805 | for (i += 1; i < F2FS_I(dn->inode)->i_cluster_size; i++) { |
| 1806 | block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, |
| 1807 | dn->ofs_in_node + i); |
| 1808 | |
| 1809 | if (!__is_valid_data_blkaddr(blkaddr)) |
| 1810 | break; |
| 1811 | if (first_blkaddr + i - (compressed ? 1 : 0) != blkaddr) |
| 1812 | return 0; |
| 1813 | } |
| 1814 | |
| 1815 | return compressed ? i - 1 : i; |
| 1816 | } |
| 1817 | |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1818 | const struct address_space_operations f2fs_compress_aops = { |
Matthew Wilcox (Oracle) | c26cd04 | 2022-04-30 23:41:46 -0400 | [diff] [blame] | 1819 | .release_folio = f2fs_release_folio, |
Matthew Wilcox (Oracle) | 9150399 | 2022-02-09 20:21:44 +0000 | [diff] [blame] | 1820 | .invalidate_folio = f2fs_invalidate_folio, |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1821 | }; |
| 1822 | |
| 1823 | struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi) |
| 1824 | { |
| 1825 | return sbi->compress_inode->i_mapping; |
| 1826 | } |
| 1827 | |
| 1828 | void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr) |
| 1829 | { |
| 1830 | if (!sbi->compress_inode) |
| 1831 | return; |
| 1832 | invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr); |
| 1833 | } |
| 1834 | |
| 1835 | void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, |
| 1836 | nid_t ino, block_t blkaddr) |
| 1837 | { |
| 1838 | struct page *cpage; |
| 1839 | int ret; |
| 1840 | |
| 1841 | if (!test_opt(sbi, COMPRESS_CACHE)) |
| 1842 | return; |
| 1843 | |
| 1844 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) |
| 1845 | return; |
| 1846 | |
| 1847 | if (!f2fs_available_free_memory(sbi, COMPRESS_PAGE)) |
| 1848 | return; |
| 1849 | |
| 1850 | cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr); |
| 1851 | if (cpage) { |
| 1852 | f2fs_put_page(cpage, 0); |
| 1853 | return; |
| 1854 | } |
| 1855 | |
| 1856 | cpage = alloc_page(__GFP_NOWARN | __GFP_IO); |
| 1857 | if (!cpage) |
| 1858 | return; |
| 1859 | |
| 1860 | ret = add_to_page_cache_lru(cpage, COMPRESS_MAPPING(sbi), |
| 1861 | blkaddr, GFP_NOFS); |
| 1862 | if (ret) { |
| 1863 | f2fs_put_page(cpage, 0); |
| 1864 | return; |
| 1865 | } |
| 1866 | |
| 1867 | set_page_private_data(cpage, ino); |
| 1868 | |
| 1869 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) |
| 1870 | goto out; |
| 1871 | |
| 1872 | memcpy(page_address(cpage), page_address(page), PAGE_SIZE); |
| 1873 | SetPageUptodate(cpage); |
| 1874 | out: |
| 1875 | f2fs_put_page(cpage, 1); |
| 1876 | } |
| 1877 | |
| 1878 | bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page, |
| 1879 | block_t blkaddr) |
| 1880 | { |
| 1881 | struct page *cpage; |
| 1882 | bool hitted = false; |
| 1883 | |
| 1884 | if (!test_opt(sbi, COMPRESS_CACHE)) |
| 1885 | return false; |
| 1886 | |
| 1887 | cpage = f2fs_pagecache_get_page(COMPRESS_MAPPING(sbi), |
| 1888 | blkaddr, FGP_LOCK | FGP_NOWAIT, GFP_NOFS); |
| 1889 | if (cpage) { |
| 1890 | if (PageUptodate(cpage)) { |
| 1891 | atomic_inc(&sbi->compress_page_hit); |
| 1892 | memcpy(page_address(page), |
| 1893 | page_address(cpage), PAGE_SIZE); |
| 1894 | hitted = true; |
| 1895 | } |
| 1896 | f2fs_put_page(cpage, 1); |
| 1897 | } |
| 1898 | |
| 1899 | return hitted; |
| 1900 | } |
| 1901 | |
| 1902 | void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino) |
| 1903 | { |
Zhang Qilong | 173cdf2 | 2022-08-30 14:55:15 +0800 | [diff] [blame] | 1904 | struct address_space *mapping = COMPRESS_MAPPING(sbi); |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1905 | struct folio_batch fbatch; |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1906 | pgoff_t index = 0; |
| 1907 | pgoff_t end = MAX_BLKADDR(sbi); |
| 1908 | |
| 1909 | if (!mapping->nrpages) |
| 1910 | return; |
| 1911 | |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1912 | folio_batch_init(&fbatch); |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1913 | |
| 1914 | do { |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1915 | unsigned int nr, i; |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1916 | |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1917 | nr = filemap_get_folios(mapping, &index, end - 1, &fbatch); |
| 1918 | if (!nr) |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1919 | break; |
| 1920 | |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1921 | for (i = 0; i < nr; i++) { |
| 1922 | struct folio *folio = fbatch.folios[i]; |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1923 | |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1924 | folio_lock(folio); |
| 1925 | if (folio->mapping != mapping) { |
| 1926 | folio_unlock(folio); |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1927 | continue; |
| 1928 | } |
| 1929 | |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1930 | if (ino != get_page_private_data(&folio->page)) { |
| 1931 | folio_unlock(folio); |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1932 | continue; |
| 1933 | } |
| 1934 | |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1935 | generic_error_remove_page(mapping, &folio->page); |
| 1936 | folio_unlock(folio); |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1937 | } |
Matthew Wilcox (Oracle) | bbfe4f6 | 2022-06-04 16:27:58 -0400 | [diff] [blame] | 1938 | folio_batch_release(&fbatch); |
Chao Yu | 6ce19af | 2021-05-20 19:51:50 +0800 | [diff] [blame] | 1939 | cond_resched(); |
| 1940 | } while (index < end); |
| 1941 | } |
| 1942 | |
| 1943 | int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) |
| 1944 | { |
| 1945 | struct inode *inode; |
| 1946 | |
| 1947 | if (!test_opt(sbi, COMPRESS_CACHE)) |
| 1948 | return 0; |
| 1949 | |
| 1950 | inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi)); |
| 1951 | if (IS_ERR(inode)) |
| 1952 | return PTR_ERR(inode); |
| 1953 | sbi->compress_inode = inode; |
| 1954 | |
| 1955 | sbi->compress_percent = COMPRESS_PERCENT; |
| 1956 | sbi->compress_watermark = COMPRESS_WATERMARK; |
| 1957 | |
| 1958 | atomic_set(&sbi->compress_page_hit, 0); |
| 1959 | |
| 1960 | return 0; |
| 1961 | } |
| 1962 | |
| 1963 | void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) |
| 1964 | { |
| 1965 | if (!sbi->compress_inode) |
| 1966 | return; |
| 1967 | iput(sbi->compress_inode); |
| 1968 | sbi->compress_inode = NULL; |
| 1969 | } |
| 1970 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1971 | int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) |
| 1972 | { |
| 1973 | dev_t dev = sbi->sb->s_bdev->bd_dev; |
| 1974 | char slab_name[32]; |
| 1975 | |
Chao Yu | 29be7ec | 2022-06-19 01:51:55 +0800 | [diff] [blame] | 1976 | if (!f2fs_sb_has_compression(sbi)) |
| 1977 | return 0; |
| 1978 | |
Chao Yu | 3108303 | 2020-09-14 17:05:13 +0800 | [diff] [blame] | 1979 | sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); |
| 1980 | |
| 1981 | sbi->page_array_slab_size = sizeof(struct page *) << |
| 1982 | F2FS_OPTION(sbi).compress_log_size; |
| 1983 | |
| 1984 | sbi->page_array_slab = f2fs_kmem_cache_create(slab_name, |
| 1985 | sbi->page_array_slab_size); |
| 1986 | if (!sbi->page_array_slab) |
| 1987 | return -ENOMEM; |
| 1988 | return 0; |
| 1989 | } |
| 1990 | |
| 1991 | void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) |
| 1992 | { |
| 1993 | kmem_cache_destroy(sbi->page_array_slab); |
| 1994 | } |
Chao Yu | c68d6c8 | 2020-09-14 17:05:14 +0800 | [diff] [blame] | 1995 | |
| 1996 | static int __init f2fs_init_cic_cache(void) |
| 1997 | { |
| 1998 | cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry", |
| 1999 | sizeof(struct compress_io_ctx)); |
| 2000 | if (!cic_entry_slab) |
| 2001 | return -ENOMEM; |
| 2002 | return 0; |
| 2003 | } |
| 2004 | |
| 2005 | static void f2fs_destroy_cic_cache(void) |
| 2006 | { |
| 2007 | kmem_cache_destroy(cic_entry_slab); |
| 2008 | } |
| 2009 | |
| 2010 | static int __init f2fs_init_dic_cache(void) |
| 2011 | { |
| 2012 | dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry", |
| 2013 | sizeof(struct decompress_io_ctx)); |
| 2014 | if (!dic_entry_slab) |
| 2015 | return -ENOMEM; |
| 2016 | return 0; |
| 2017 | } |
| 2018 | |
| 2019 | static void f2fs_destroy_dic_cache(void) |
| 2020 | { |
| 2021 | kmem_cache_destroy(dic_entry_slab); |
| 2022 | } |
| 2023 | |
| 2024 | int __init f2fs_init_compress_cache(void) |
| 2025 | { |
| 2026 | int err; |
| 2027 | |
| 2028 | err = f2fs_init_cic_cache(); |
| 2029 | if (err) |
| 2030 | goto out; |
| 2031 | err = f2fs_init_dic_cache(); |
| 2032 | if (err) |
| 2033 | goto free_cic; |
| 2034 | return 0; |
| 2035 | free_cic: |
| 2036 | f2fs_destroy_cic_cache(); |
| 2037 | out: |
| 2038 | return -ENOMEM; |
| 2039 | } |
| 2040 | |
| 2041 | void f2fs_destroy_compress_cache(void) |
| 2042 | { |
| 2043 | f2fs_destroy_dic_cache(); |
| 2044 | f2fs_destroy_cic_cache(); |
| 2045 | } |