14c8ff709SChao Yu // SPDX-License-Identifier: GPL-2.0 24c8ff709SChao Yu /* 34c8ff709SChao Yu * f2fs compress support 44c8ff709SChao Yu * 54c8ff709SChao Yu * Copyright (c) 2019 Chao Yu <chao@kernel.org> 64c8ff709SChao Yu */ 74c8ff709SChao Yu 84c8ff709SChao Yu #include <linux/fs.h> 94c8ff709SChao Yu #include <linux/f2fs_fs.h> 104c8ff709SChao Yu #include <linux/writeback.h> 114c8ff709SChao Yu #include <linux/backing-dev.h> 124c8ff709SChao Yu #include <linux/lzo.h> 134c8ff709SChao Yu #include <linux/lz4.h> 14*50cfa66fSChao Yu #include <linux/zstd.h> 154c8ff709SChao Yu 164c8ff709SChao Yu #include "f2fs.h" 174c8ff709SChao Yu #include "node.h" 184c8ff709SChao Yu #include <trace/events/f2fs.h> 194c8ff709SChao Yu 204c8ff709SChao Yu struct f2fs_compress_ops { 214c8ff709SChao Yu int (*init_compress_ctx)(struct compress_ctx *cc); 224c8ff709SChao Yu void (*destroy_compress_ctx)(struct compress_ctx *cc); 234c8ff709SChao Yu int (*compress_pages)(struct compress_ctx *cc); 2423b1faaaSChao Yu int (*init_decompress_ctx)(struct decompress_io_ctx *dic); 2523b1faaaSChao Yu void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic); 264c8ff709SChao Yu int (*decompress_pages)(struct decompress_io_ctx *dic); 274c8ff709SChao Yu }; 284c8ff709SChao Yu 294c8ff709SChao Yu static unsigned int offset_in_cluster(struct compress_ctx *cc, pgoff_t index) 304c8ff709SChao Yu { 314c8ff709SChao Yu return index & (cc->cluster_size - 1); 324c8ff709SChao Yu } 334c8ff709SChao Yu 344c8ff709SChao Yu static pgoff_t cluster_idx(struct compress_ctx *cc, pgoff_t index) 354c8ff709SChao Yu { 364c8ff709SChao Yu return index >> cc->log_cluster_size; 374c8ff709SChao Yu } 384c8ff709SChao Yu 394c8ff709SChao Yu static pgoff_t start_idx_of_cluster(struct compress_ctx *cc) 404c8ff709SChao Yu { 414c8ff709SChao Yu return cc->cluster_idx << cc->log_cluster_size; 424c8ff709SChao Yu } 434c8ff709SChao Yu 444c8ff709SChao Yu bool f2fs_is_compressed_page(struct page *page) 454c8ff709SChao Yu { 464c8ff709SChao Yu if (!PagePrivate(page)) 474c8ff709SChao Yu return false; 484c8ff709SChao Yu if (!page_private(page)) 494c8ff709SChao Yu return false; 504c8ff709SChao Yu if (IS_ATOMIC_WRITTEN_PAGE(page) || IS_DUMMY_WRITTEN_PAGE(page)) 514c8ff709SChao Yu return false; 524c8ff709SChao Yu f2fs_bug_on(F2FS_M_SB(page->mapping), 534c8ff709SChao Yu *((u32 *)page_private(page)) != F2FS_COMPRESSED_PAGE_MAGIC); 544c8ff709SChao Yu return true; 554c8ff709SChao Yu } 564c8ff709SChao Yu 574c8ff709SChao Yu static void f2fs_set_compressed_page(struct page *page, 58887347a0SChao Yu struct inode *inode, pgoff_t index, void *data) 594c8ff709SChao Yu { 604c8ff709SChao Yu SetPagePrivate(page); 614c8ff709SChao Yu set_page_private(page, (unsigned long)data); 624c8ff709SChao Yu 634c8ff709SChao Yu /* i_crypto_info and iv index */ 644c8ff709SChao Yu page->index = index; 654c8ff709SChao Yu page->mapping = inode->i_mapping; 664c8ff709SChao Yu } 674c8ff709SChao Yu 684c8ff709SChao Yu static void f2fs_put_compressed_page(struct page *page) 694c8ff709SChao Yu { 704c8ff709SChao Yu set_page_private(page, (unsigned long)NULL); 714c8ff709SChao Yu ClearPagePrivate(page); 724c8ff709SChao Yu page->mapping = NULL; 734c8ff709SChao Yu unlock_page(page); 744c8ff709SChao Yu put_page(page); 754c8ff709SChao Yu } 764c8ff709SChao Yu 774c8ff709SChao Yu static void f2fs_drop_rpages(struct compress_ctx *cc, int len, bool unlock) 784c8ff709SChao Yu { 794c8ff709SChao Yu int i; 804c8ff709SChao Yu 814c8ff709SChao Yu for (i = 0; i < len; i++) { 824c8ff709SChao Yu if (!cc->rpages[i]) 834c8ff709SChao Yu continue; 844c8ff709SChao Yu if (unlock) 854c8ff709SChao Yu unlock_page(cc->rpages[i]); 864c8ff709SChao Yu else 874c8ff709SChao Yu put_page(cc->rpages[i]); 884c8ff709SChao Yu } 894c8ff709SChao Yu } 904c8ff709SChao Yu 914c8ff709SChao Yu static void f2fs_put_rpages(struct compress_ctx *cc) 924c8ff709SChao Yu { 934c8ff709SChao Yu f2fs_drop_rpages(cc, cc->cluster_size, false); 944c8ff709SChao Yu } 954c8ff709SChao Yu 964c8ff709SChao Yu static void f2fs_unlock_rpages(struct compress_ctx *cc, int len) 974c8ff709SChao Yu { 984c8ff709SChao Yu f2fs_drop_rpages(cc, len, true); 994c8ff709SChao Yu } 1004c8ff709SChao Yu 1014c8ff709SChao Yu static void f2fs_put_rpages_mapping(struct compress_ctx *cc, 1024c8ff709SChao Yu struct address_space *mapping, 1034c8ff709SChao Yu pgoff_t start, int len) 1044c8ff709SChao Yu { 1054c8ff709SChao Yu int i; 1064c8ff709SChao Yu 1074c8ff709SChao Yu for (i = 0; i < len; i++) { 1084c8ff709SChao Yu struct page *page = find_get_page(mapping, start + i); 1094c8ff709SChao Yu 1104c8ff709SChao Yu put_page(page); 1114c8ff709SChao Yu put_page(page); 1124c8ff709SChao Yu } 1134c8ff709SChao Yu } 1144c8ff709SChao Yu 1154c8ff709SChao Yu static void f2fs_put_rpages_wbc(struct compress_ctx *cc, 1164c8ff709SChao Yu struct writeback_control *wbc, bool redirty, int unlock) 1174c8ff709SChao Yu { 1184c8ff709SChao Yu unsigned int i; 1194c8ff709SChao Yu 1204c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 1214c8ff709SChao Yu if (!cc->rpages[i]) 1224c8ff709SChao Yu continue; 1234c8ff709SChao Yu if (redirty) 1244c8ff709SChao Yu redirty_page_for_writepage(wbc, cc->rpages[i]); 1254c8ff709SChao Yu f2fs_put_page(cc->rpages[i], unlock); 1264c8ff709SChao Yu } 1274c8ff709SChao Yu } 1284c8ff709SChao Yu 1294c8ff709SChao Yu struct page *f2fs_compress_control_page(struct page *page) 1304c8ff709SChao Yu { 1314c8ff709SChao Yu return ((struct compress_io_ctx *)page_private(page))->rpages[0]; 1324c8ff709SChao Yu } 1334c8ff709SChao Yu 1344c8ff709SChao Yu int f2fs_init_compress_ctx(struct compress_ctx *cc) 1354c8ff709SChao Yu { 1364c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); 1374c8ff709SChao Yu 1384c8ff709SChao Yu if (cc->nr_rpages) 1394c8ff709SChao Yu return 0; 1404c8ff709SChao Yu 1414c8ff709SChao Yu cc->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) << 1424c8ff709SChao Yu cc->log_cluster_size, GFP_NOFS); 1434c8ff709SChao Yu return cc->rpages ? 0 : -ENOMEM; 1444c8ff709SChao Yu } 1454c8ff709SChao Yu 1464c8ff709SChao Yu void f2fs_destroy_compress_ctx(struct compress_ctx *cc) 1474c8ff709SChao Yu { 1484c8ff709SChao Yu kfree(cc->rpages); 1494c8ff709SChao Yu cc->rpages = NULL; 1504c8ff709SChao Yu cc->nr_rpages = 0; 1514c8ff709SChao Yu cc->nr_cpages = 0; 1524c8ff709SChao Yu cc->cluster_idx = NULL_CLUSTER; 1534c8ff709SChao Yu } 1544c8ff709SChao Yu 1554c8ff709SChao Yu void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page) 1564c8ff709SChao Yu { 1574c8ff709SChao Yu unsigned int cluster_ofs; 1584c8ff709SChao Yu 1594c8ff709SChao Yu if (!f2fs_cluster_can_merge_page(cc, page->index)) 1604c8ff709SChao Yu f2fs_bug_on(F2FS_I_SB(cc->inode), 1); 1614c8ff709SChao Yu 1624c8ff709SChao Yu cluster_ofs = offset_in_cluster(cc, page->index); 1634c8ff709SChao Yu cc->rpages[cluster_ofs] = page; 1644c8ff709SChao Yu cc->nr_rpages++; 1654c8ff709SChao Yu cc->cluster_idx = cluster_idx(cc, page->index); 1664c8ff709SChao Yu } 1674c8ff709SChao Yu 1684c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZO 1694c8ff709SChao Yu static int lzo_init_compress_ctx(struct compress_ctx *cc) 1704c8ff709SChao Yu { 1714c8ff709SChao Yu cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), 1724c8ff709SChao Yu LZO1X_MEM_COMPRESS, GFP_NOFS); 1734c8ff709SChao Yu if (!cc->private) 1744c8ff709SChao Yu return -ENOMEM; 1754c8ff709SChao Yu 1764c8ff709SChao Yu cc->clen = lzo1x_worst_compress(PAGE_SIZE << cc->log_cluster_size); 1774c8ff709SChao Yu return 0; 1784c8ff709SChao Yu } 1794c8ff709SChao Yu 1804c8ff709SChao Yu static void lzo_destroy_compress_ctx(struct compress_ctx *cc) 1814c8ff709SChao Yu { 1824c8ff709SChao Yu kvfree(cc->private); 1834c8ff709SChao Yu cc->private = NULL; 1844c8ff709SChao Yu } 1854c8ff709SChao Yu 1864c8ff709SChao Yu static int lzo_compress_pages(struct compress_ctx *cc) 1874c8ff709SChao Yu { 1884c8ff709SChao Yu int ret; 1894c8ff709SChao Yu 1904c8ff709SChao Yu ret = lzo1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, 1914c8ff709SChao Yu &cc->clen, cc->private); 1924c8ff709SChao Yu if (ret != LZO_E_OK) { 1934c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lzo compress failed, ret:%d\n", 1944c8ff709SChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); 1954c8ff709SChao Yu return -EIO; 1964c8ff709SChao Yu } 1974c8ff709SChao Yu return 0; 1984c8ff709SChao Yu } 1994c8ff709SChao Yu 2004c8ff709SChao Yu static int lzo_decompress_pages(struct decompress_io_ctx *dic) 2014c8ff709SChao Yu { 2024c8ff709SChao Yu int ret; 2034c8ff709SChao Yu 2044c8ff709SChao Yu ret = lzo1x_decompress_safe(dic->cbuf->cdata, dic->clen, 2054c8ff709SChao Yu dic->rbuf, &dic->rlen); 2064c8ff709SChao Yu if (ret != LZO_E_OK) { 2074c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lzo decompress failed, ret:%d\n", 2084c8ff709SChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); 2094c8ff709SChao Yu return -EIO; 2104c8ff709SChao Yu } 2114c8ff709SChao Yu 2124c8ff709SChao Yu if (dic->rlen != PAGE_SIZE << dic->log_cluster_size) { 2134c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lzo invalid rlen:%zu, " 2144c8ff709SChao Yu "expected:%lu\n", KERN_ERR, 2154c8ff709SChao Yu F2FS_I_SB(dic->inode)->sb->s_id, 2164c8ff709SChao Yu dic->rlen, 2174c8ff709SChao Yu PAGE_SIZE << dic->log_cluster_size); 2184c8ff709SChao Yu return -EIO; 2194c8ff709SChao Yu } 2204c8ff709SChao Yu return 0; 2214c8ff709SChao Yu } 2224c8ff709SChao Yu 2234c8ff709SChao Yu static const struct f2fs_compress_ops f2fs_lzo_ops = { 2244c8ff709SChao Yu .init_compress_ctx = lzo_init_compress_ctx, 2254c8ff709SChao Yu .destroy_compress_ctx = lzo_destroy_compress_ctx, 2264c8ff709SChao Yu .compress_pages = lzo_compress_pages, 2274c8ff709SChao Yu .decompress_pages = lzo_decompress_pages, 2284c8ff709SChao Yu }; 2294c8ff709SChao Yu #endif 2304c8ff709SChao Yu 2314c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZ4 2324c8ff709SChao Yu static int lz4_init_compress_ctx(struct compress_ctx *cc) 2334c8ff709SChao Yu { 2344c8ff709SChao Yu cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), 2354c8ff709SChao Yu LZ4_MEM_COMPRESS, GFP_NOFS); 2364c8ff709SChao Yu if (!cc->private) 2374c8ff709SChao Yu return -ENOMEM; 2384c8ff709SChao Yu 2394c8ff709SChao Yu cc->clen = LZ4_compressBound(PAGE_SIZE << cc->log_cluster_size); 2404c8ff709SChao Yu return 0; 2414c8ff709SChao Yu } 2424c8ff709SChao Yu 2434c8ff709SChao Yu static void lz4_destroy_compress_ctx(struct compress_ctx *cc) 2444c8ff709SChao Yu { 2454c8ff709SChao Yu kvfree(cc->private); 2464c8ff709SChao Yu cc->private = NULL; 2474c8ff709SChao Yu } 2484c8ff709SChao Yu 2494c8ff709SChao Yu static int lz4_compress_pages(struct compress_ctx *cc) 2504c8ff709SChao Yu { 2514c8ff709SChao Yu int len; 2524c8ff709SChao Yu 2534c8ff709SChao Yu len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, 2544c8ff709SChao Yu cc->clen, cc->private); 2554c8ff709SChao Yu if (!len) { 2564c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lz4 compress failed\n", 2574c8ff709SChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id); 2584c8ff709SChao Yu return -EIO; 2594c8ff709SChao Yu } 2604c8ff709SChao Yu cc->clen = len; 2614c8ff709SChao Yu return 0; 2624c8ff709SChao Yu } 2634c8ff709SChao Yu 2644c8ff709SChao Yu static int lz4_decompress_pages(struct decompress_io_ctx *dic) 2654c8ff709SChao Yu { 2664c8ff709SChao Yu int ret; 2674c8ff709SChao Yu 2684c8ff709SChao Yu ret = LZ4_decompress_safe(dic->cbuf->cdata, dic->rbuf, 2694c8ff709SChao Yu dic->clen, dic->rlen); 2704c8ff709SChao Yu if (ret < 0) { 2714c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lz4 decompress failed, ret:%d\n", 2724c8ff709SChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); 2734c8ff709SChao Yu return -EIO; 2744c8ff709SChao Yu } 2754c8ff709SChao Yu 2764c8ff709SChao Yu if (ret != PAGE_SIZE << dic->log_cluster_size) { 2774c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lz4 invalid rlen:%zu, " 2784c8ff709SChao Yu "expected:%lu\n", KERN_ERR, 2794c8ff709SChao Yu F2FS_I_SB(dic->inode)->sb->s_id, 2804c8ff709SChao Yu dic->rlen, 2814c8ff709SChao Yu PAGE_SIZE << dic->log_cluster_size); 2824c8ff709SChao Yu return -EIO; 2834c8ff709SChao Yu } 2844c8ff709SChao Yu return 0; 2854c8ff709SChao Yu } 2864c8ff709SChao Yu 2874c8ff709SChao Yu static const struct f2fs_compress_ops f2fs_lz4_ops = { 2884c8ff709SChao Yu .init_compress_ctx = lz4_init_compress_ctx, 2894c8ff709SChao Yu .destroy_compress_ctx = lz4_destroy_compress_ctx, 2904c8ff709SChao Yu .compress_pages = lz4_compress_pages, 2914c8ff709SChao Yu .decompress_pages = lz4_decompress_pages, 2924c8ff709SChao Yu }; 2934c8ff709SChao Yu #endif 2944c8ff709SChao Yu 295*50cfa66fSChao Yu #ifdef CONFIG_F2FS_FS_ZSTD 296*50cfa66fSChao Yu #define F2FS_ZSTD_DEFAULT_CLEVEL 1 297*50cfa66fSChao Yu 298*50cfa66fSChao Yu static int zstd_init_compress_ctx(struct compress_ctx *cc) 299*50cfa66fSChao Yu { 300*50cfa66fSChao Yu ZSTD_parameters params; 301*50cfa66fSChao Yu ZSTD_CStream *stream; 302*50cfa66fSChao Yu void *workspace; 303*50cfa66fSChao Yu unsigned int workspace_size; 304*50cfa66fSChao Yu 305*50cfa66fSChao Yu params = ZSTD_getParams(F2FS_ZSTD_DEFAULT_CLEVEL, cc->rlen, 0); 306*50cfa66fSChao Yu workspace_size = ZSTD_CStreamWorkspaceBound(params.cParams); 307*50cfa66fSChao Yu 308*50cfa66fSChao Yu workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode), 309*50cfa66fSChao Yu workspace_size, GFP_NOFS); 310*50cfa66fSChao Yu if (!workspace) 311*50cfa66fSChao Yu return -ENOMEM; 312*50cfa66fSChao Yu 313*50cfa66fSChao Yu stream = ZSTD_initCStream(params, 0, workspace, workspace_size); 314*50cfa66fSChao Yu if (!stream) { 315*50cfa66fSChao Yu printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_initCStream failed\n", 316*50cfa66fSChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, 317*50cfa66fSChao Yu __func__); 318*50cfa66fSChao Yu kvfree(workspace); 319*50cfa66fSChao Yu return -EIO; 320*50cfa66fSChao Yu } 321*50cfa66fSChao Yu 322*50cfa66fSChao Yu cc->private = workspace; 323*50cfa66fSChao Yu cc->private2 = stream; 324*50cfa66fSChao Yu 325*50cfa66fSChao Yu cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; 326*50cfa66fSChao Yu return 0; 327*50cfa66fSChao Yu } 328*50cfa66fSChao Yu 329*50cfa66fSChao Yu static void zstd_destroy_compress_ctx(struct compress_ctx *cc) 330*50cfa66fSChao Yu { 331*50cfa66fSChao Yu kvfree(cc->private); 332*50cfa66fSChao Yu cc->private = NULL; 333*50cfa66fSChao Yu cc->private2 = NULL; 334*50cfa66fSChao Yu } 335*50cfa66fSChao Yu 336*50cfa66fSChao Yu static int zstd_compress_pages(struct compress_ctx *cc) 337*50cfa66fSChao Yu { 338*50cfa66fSChao Yu ZSTD_CStream *stream = cc->private2; 339*50cfa66fSChao Yu ZSTD_inBuffer inbuf; 340*50cfa66fSChao Yu ZSTD_outBuffer outbuf; 341*50cfa66fSChao Yu int src_size = cc->rlen; 342*50cfa66fSChao Yu int dst_size = src_size - PAGE_SIZE - COMPRESS_HEADER_SIZE; 343*50cfa66fSChao Yu int ret; 344*50cfa66fSChao Yu 345*50cfa66fSChao Yu inbuf.pos = 0; 346*50cfa66fSChao Yu inbuf.src = cc->rbuf; 347*50cfa66fSChao Yu inbuf.size = src_size; 348*50cfa66fSChao Yu 349*50cfa66fSChao Yu outbuf.pos = 0; 350*50cfa66fSChao Yu outbuf.dst = cc->cbuf->cdata; 351*50cfa66fSChao Yu outbuf.size = dst_size; 352*50cfa66fSChao Yu 353*50cfa66fSChao Yu ret = ZSTD_compressStream(stream, &outbuf, &inbuf); 354*50cfa66fSChao Yu if (ZSTD_isError(ret)) { 355*50cfa66fSChao Yu printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_compressStream failed, ret: %d\n", 356*50cfa66fSChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, 357*50cfa66fSChao Yu __func__, ZSTD_getErrorCode(ret)); 358*50cfa66fSChao Yu return -EIO; 359*50cfa66fSChao Yu } 360*50cfa66fSChao Yu 361*50cfa66fSChao Yu ret = ZSTD_endStream(stream, &outbuf); 362*50cfa66fSChao Yu if (ZSTD_isError(ret)) { 363*50cfa66fSChao Yu printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_endStream returned %d\n", 364*50cfa66fSChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, 365*50cfa66fSChao Yu __func__, ZSTD_getErrorCode(ret)); 366*50cfa66fSChao Yu return -EIO; 367*50cfa66fSChao Yu } 368*50cfa66fSChao Yu 369*50cfa66fSChao Yu cc->clen = outbuf.pos; 370*50cfa66fSChao Yu return 0; 371*50cfa66fSChao Yu } 372*50cfa66fSChao Yu 373*50cfa66fSChao Yu static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic) 374*50cfa66fSChao Yu { 375*50cfa66fSChao Yu ZSTD_DStream *stream; 376*50cfa66fSChao Yu void *workspace; 377*50cfa66fSChao Yu unsigned int workspace_size; 378*50cfa66fSChao Yu 379*50cfa66fSChao Yu workspace_size = ZSTD_DStreamWorkspaceBound(MAX_COMPRESS_WINDOW_SIZE); 380*50cfa66fSChao Yu 381*50cfa66fSChao Yu workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode), 382*50cfa66fSChao Yu workspace_size, GFP_NOFS); 383*50cfa66fSChao Yu if (!workspace) 384*50cfa66fSChao Yu return -ENOMEM; 385*50cfa66fSChao Yu 386*50cfa66fSChao Yu stream = ZSTD_initDStream(MAX_COMPRESS_WINDOW_SIZE, 387*50cfa66fSChao Yu workspace, workspace_size); 388*50cfa66fSChao Yu if (!stream) { 389*50cfa66fSChao Yu printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_initDStream failed\n", 390*50cfa66fSChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, 391*50cfa66fSChao Yu __func__); 392*50cfa66fSChao Yu kvfree(workspace); 393*50cfa66fSChao Yu return -EIO; 394*50cfa66fSChao Yu } 395*50cfa66fSChao Yu 396*50cfa66fSChao Yu dic->private = workspace; 397*50cfa66fSChao Yu dic->private2 = stream; 398*50cfa66fSChao Yu 399*50cfa66fSChao Yu return 0; 400*50cfa66fSChao Yu } 401*50cfa66fSChao Yu 402*50cfa66fSChao Yu static void zstd_destroy_decompress_ctx(struct decompress_io_ctx *dic) 403*50cfa66fSChao Yu { 404*50cfa66fSChao Yu kvfree(dic->private); 405*50cfa66fSChao Yu dic->private = NULL; 406*50cfa66fSChao Yu dic->private2 = NULL; 407*50cfa66fSChao Yu } 408*50cfa66fSChao Yu 409*50cfa66fSChao Yu static int zstd_decompress_pages(struct decompress_io_ctx *dic) 410*50cfa66fSChao Yu { 411*50cfa66fSChao Yu ZSTD_DStream *stream = dic->private2; 412*50cfa66fSChao Yu ZSTD_inBuffer inbuf; 413*50cfa66fSChao Yu ZSTD_outBuffer outbuf; 414*50cfa66fSChao Yu int ret; 415*50cfa66fSChao Yu 416*50cfa66fSChao Yu inbuf.pos = 0; 417*50cfa66fSChao Yu inbuf.src = dic->cbuf->cdata; 418*50cfa66fSChao Yu inbuf.size = dic->clen; 419*50cfa66fSChao Yu 420*50cfa66fSChao Yu outbuf.pos = 0; 421*50cfa66fSChao Yu outbuf.dst = dic->rbuf; 422*50cfa66fSChao Yu outbuf.size = dic->rlen; 423*50cfa66fSChao Yu 424*50cfa66fSChao Yu ret = ZSTD_decompressStream(stream, &outbuf, &inbuf); 425*50cfa66fSChao Yu if (ZSTD_isError(ret)) { 426*50cfa66fSChao Yu printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_compressStream failed, ret: %d\n", 427*50cfa66fSChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, 428*50cfa66fSChao Yu __func__, ZSTD_getErrorCode(ret)); 429*50cfa66fSChao Yu return -EIO; 430*50cfa66fSChao Yu } 431*50cfa66fSChao Yu 432*50cfa66fSChao Yu if (dic->rlen != outbuf.pos) { 433*50cfa66fSChao Yu printk_ratelimited("%sF2FS-fs (%s): %s ZSTD invalid rlen:%zu, " 434*50cfa66fSChao Yu "expected:%lu\n", KERN_ERR, 435*50cfa66fSChao Yu F2FS_I_SB(dic->inode)->sb->s_id, 436*50cfa66fSChao Yu __func__, dic->rlen, 437*50cfa66fSChao Yu PAGE_SIZE << dic->log_cluster_size); 438*50cfa66fSChao Yu return -EIO; 439*50cfa66fSChao Yu } 440*50cfa66fSChao Yu 441*50cfa66fSChao Yu return 0; 442*50cfa66fSChao Yu } 443*50cfa66fSChao Yu 444*50cfa66fSChao Yu static const struct f2fs_compress_ops f2fs_zstd_ops = { 445*50cfa66fSChao Yu .init_compress_ctx = zstd_init_compress_ctx, 446*50cfa66fSChao Yu .destroy_compress_ctx = zstd_destroy_compress_ctx, 447*50cfa66fSChao Yu .compress_pages = zstd_compress_pages, 448*50cfa66fSChao Yu .init_decompress_ctx = zstd_init_decompress_ctx, 449*50cfa66fSChao Yu .destroy_decompress_ctx = zstd_destroy_decompress_ctx, 450*50cfa66fSChao Yu .decompress_pages = zstd_decompress_pages, 451*50cfa66fSChao Yu }; 452*50cfa66fSChao Yu #endif 453*50cfa66fSChao Yu 4544c8ff709SChao Yu static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = { 4554c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZO 4564c8ff709SChao Yu &f2fs_lzo_ops, 4574c8ff709SChao Yu #else 4584c8ff709SChao Yu NULL, 4594c8ff709SChao Yu #endif 4604c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZ4 4614c8ff709SChao Yu &f2fs_lz4_ops, 4624c8ff709SChao Yu #else 4634c8ff709SChao Yu NULL, 4644c8ff709SChao Yu #endif 465*50cfa66fSChao Yu #ifdef CONFIG_F2FS_FS_ZSTD 466*50cfa66fSChao Yu &f2fs_zstd_ops, 467*50cfa66fSChao Yu #else 468*50cfa66fSChao Yu NULL, 469*50cfa66fSChao Yu #endif 4704c8ff709SChao Yu }; 4714c8ff709SChao Yu 4724c8ff709SChao Yu bool f2fs_is_compress_backend_ready(struct inode *inode) 4734c8ff709SChao Yu { 4744c8ff709SChao Yu if (!f2fs_compressed_file(inode)) 4754c8ff709SChao Yu return true; 4764c8ff709SChao Yu return f2fs_cops[F2FS_I(inode)->i_compress_algorithm]; 4774c8ff709SChao Yu } 4784c8ff709SChao Yu 4794c8ff709SChao Yu static struct page *f2fs_grab_page(void) 4804c8ff709SChao Yu { 4814c8ff709SChao Yu struct page *page; 4824c8ff709SChao Yu 4834c8ff709SChao Yu page = alloc_page(GFP_NOFS); 4844c8ff709SChao Yu if (!page) 4854c8ff709SChao Yu return NULL; 4864c8ff709SChao Yu lock_page(page); 4874c8ff709SChao Yu return page; 4884c8ff709SChao Yu } 4894c8ff709SChao Yu 4904c8ff709SChao Yu static int f2fs_compress_pages(struct compress_ctx *cc) 4914c8ff709SChao Yu { 4924c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); 4934c8ff709SChao Yu struct f2fs_inode_info *fi = F2FS_I(cc->inode); 4944c8ff709SChao Yu const struct f2fs_compress_ops *cops = 4954c8ff709SChao Yu f2fs_cops[fi->i_compress_algorithm]; 4964c8ff709SChao Yu unsigned int max_len, nr_cpages; 4974c8ff709SChao Yu int i, ret; 4984c8ff709SChao Yu 4994c8ff709SChao Yu trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx, 5004c8ff709SChao Yu cc->cluster_size, fi->i_compress_algorithm); 5014c8ff709SChao Yu 50223b1faaaSChao Yu if (cops->init_compress_ctx) { 5034c8ff709SChao Yu ret = cops->init_compress_ctx(cc); 5044c8ff709SChao Yu if (ret) 5054c8ff709SChao Yu goto out; 50623b1faaaSChao Yu } 5074c8ff709SChao Yu 5084c8ff709SChao Yu max_len = COMPRESS_HEADER_SIZE + cc->clen; 5094c8ff709SChao Yu cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE); 5104c8ff709SChao Yu 5114c8ff709SChao Yu cc->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) * 5124c8ff709SChao Yu cc->nr_cpages, GFP_NOFS); 5134c8ff709SChao Yu if (!cc->cpages) { 5144c8ff709SChao Yu ret = -ENOMEM; 5154c8ff709SChao Yu goto destroy_compress_ctx; 5164c8ff709SChao Yu } 5174c8ff709SChao Yu 5184c8ff709SChao Yu for (i = 0; i < cc->nr_cpages; i++) { 5194c8ff709SChao Yu cc->cpages[i] = f2fs_grab_page(); 5204c8ff709SChao Yu if (!cc->cpages[i]) { 5214c8ff709SChao Yu ret = -ENOMEM; 5224c8ff709SChao Yu goto out_free_cpages; 5234c8ff709SChao Yu } 5244c8ff709SChao Yu } 5254c8ff709SChao Yu 5264c8ff709SChao Yu cc->rbuf = vmap(cc->rpages, cc->cluster_size, VM_MAP, PAGE_KERNEL_RO); 5274c8ff709SChao Yu if (!cc->rbuf) { 5284c8ff709SChao Yu ret = -ENOMEM; 5294c8ff709SChao Yu goto out_free_cpages; 5304c8ff709SChao Yu } 5314c8ff709SChao Yu 5324c8ff709SChao Yu cc->cbuf = vmap(cc->cpages, cc->nr_cpages, VM_MAP, PAGE_KERNEL); 5334c8ff709SChao Yu if (!cc->cbuf) { 5344c8ff709SChao Yu ret = -ENOMEM; 5354c8ff709SChao Yu goto out_vunmap_rbuf; 5364c8ff709SChao Yu } 5374c8ff709SChao Yu 5384c8ff709SChao Yu ret = cops->compress_pages(cc); 5394c8ff709SChao Yu if (ret) 5404c8ff709SChao Yu goto out_vunmap_cbuf; 5414c8ff709SChao Yu 5424c8ff709SChao Yu max_len = PAGE_SIZE * (cc->cluster_size - 1) - COMPRESS_HEADER_SIZE; 5434c8ff709SChao Yu 5444c8ff709SChao Yu if (cc->clen > max_len) { 5454c8ff709SChao Yu ret = -EAGAIN; 5464c8ff709SChao Yu goto out_vunmap_cbuf; 5474c8ff709SChao Yu } 5484c8ff709SChao Yu 5494c8ff709SChao Yu cc->cbuf->clen = cpu_to_le32(cc->clen); 5504c8ff709SChao Yu 5514c8ff709SChao Yu for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++) 5524c8ff709SChao Yu cc->cbuf->reserved[i] = cpu_to_le32(0); 5534c8ff709SChao Yu 5547fa6d598SEric Biggers nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE); 5557fa6d598SEric Biggers 5567fa6d598SEric Biggers /* zero out any unused part of the last page */ 5577fa6d598SEric Biggers memset(&cc->cbuf->cdata[cc->clen], 0, 5587fa6d598SEric Biggers (nr_cpages * PAGE_SIZE) - (cc->clen + COMPRESS_HEADER_SIZE)); 5597fa6d598SEric Biggers 5604c8ff709SChao Yu vunmap(cc->cbuf); 5614c8ff709SChao Yu vunmap(cc->rbuf); 5624c8ff709SChao Yu 5634c8ff709SChao Yu for (i = nr_cpages; i < cc->nr_cpages; i++) { 5644c8ff709SChao Yu f2fs_put_compressed_page(cc->cpages[i]); 5654c8ff709SChao Yu cc->cpages[i] = NULL; 5664c8ff709SChao Yu } 5674c8ff709SChao Yu 56823b1faaaSChao Yu if (cops->destroy_compress_ctx) 56909ff4801SChao Yu cops->destroy_compress_ctx(cc); 57009ff4801SChao Yu 5714c8ff709SChao Yu cc->nr_cpages = nr_cpages; 5724c8ff709SChao Yu 5734c8ff709SChao Yu trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, 5744c8ff709SChao Yu cc->clen, ret); 5754c8ff709SChao Yu return 0; 5764c8ff709SChao Yu 5774c8ff709SChao Yu out_vunmap_cbuf: 5784c8ff709SChao Yu vunmap(cc->cbuf); 5794c8ff709SChao Yu out_vunmap_rbuf: 5804c8ff709SChao Yu vunmap(cc->rbuf); 5814c8ff709SChao Yu out_free_cpages: 5824c8ff709SChao Yu for (i = 0; i < cc->nr_cpages; i++) { 5834c8ff709SChao Yu if (cc->cpages[i]) 5844c8ff709SChao Yu f2fs_put_compressed_page(cc->cpages[i]); 5854c8ff709SChao Yu } 5864c8ff709SChao Yu kfree(cc->cpages); 5874c8ff709SChao Yu cc->cpages = NULL; 5884c8ff709SChao Yu destroy_compress_ctx: 58923b1faaaSChao Yu if (cops->destroy_compress_ctx) 5904c8ff709SChao Yu cops->destroy_compress_ctx(cc); 5914c8ff709SChao Yu out: 5924c8ff709SChao Yu trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, 5934c8ff709SChao Yu cc->clen, ret); 5944c8ff709SChao Yu return ret; 5954c8ff709SChao Yu } 5964c8ff709SChao Yu 5974c8ff709SChao Yu void f2fs_decompress_pages(struct bio *bio, struct page *page, bool verity) 5984c8ff709SChao Yu { 5994c8ff709SChao Yu struct decompress_io_ctx *dic = 6004c8ff709SChao Yu (struct decompress_io_ctx *)page_private(page); 6014c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); 6024c8ff709SChao Yu struct f2fs_inode_info *fi= F2FS_I(dic->inode); 6034c8ff709SChao Yu const struct f2fs_compress_ops *cops = 6044c8ff709SChao Yu f2fs_cops[fi->i_compress_algorithm]; 6054c8ff709SChao Yu int ret; 6064c8ff709SChao Yu 6074c8ff709SChao Yu dec_page_count(sbi, F2FS_RD_DATA); 6084c8ff709SChao Yu 6094c8ff709SChao Yu if (bio->bi_status || PageError(page)) 6104c8ff709SChao Yu dic->failed = true; 6114c8ff709SChao Yu 6124c8ff709SChao Yu if (refcount_dec_not_one(&dic->ref)) 6134c8ff709SChao Yu return; 6144c8ff709SChao Yu 6154c8ff709SChao Yu trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx, 6164c8ff709SChao Yu dic->cluster_size, fi->i_compress_algorithm); 6174c8ff709SChao Yu 6184c8ff709SChao Yu /* submit partial compressed pages */ 6194c8ff709SChao Yu if (dic->failed) { 6204c8ff709SChao Yu ret = -EIO; 6214c8ff709SChao Yu goto out_free_dic; 6224c8ff709SChao Yu } 6234c8ff709SChao Yu 62423b1faaaSChao Yu if (cops->init_decompress_ctx) { 62523b1faaaSChao Yu ret = cops->init_decompress_ctx(dic); 62623b1faaaSChao Yu if (ret) 62723b1faaaSChao Yu goto out_free_dic; 62823b1faaaSChao Yu } 62923b1faaaSChao Yu 6304c8ff709SChao Yu dic->rbuf = vmap(dic->tpages, dic->cluster_size, VM_MAP, PAGE_KERNEL); 6314c8ff709SChao Yu if (!dic->rbuf) { 6324c8ff709SChao Yu ret = -ENOMEM; 63323b1faaaSChao Yu goto destroy_decompress_ctx; 6344c8ff709SChao Yu } 6354c8ff709SChao Yu 6364c8ff709SChao Yu dic->cbuf = vmap(dic->cpages, dic->nr_cpages, VM_MAP, PAGE_KERNEL_RO); 6374c8ff709SChao Yu if (!dic->cbuf) { 6384c8ff709SChao Yu ret = -ENOMEM; 6394c8ff709SChao Yu goto out_vunmap_rbuf; 6404c8ff709SChao Yu } 6414c8ff709SChao Yu 6424c8ff709SChao Yu dic->clen = le32_to_cpu(dic->cbuf->clen); 6434c8ff709SChao Yu dic->rlen = PAGE_SIZE << dic->log_cluster_size; 6444c8ff709SChao Yu 6454c8ff709SChao Yu if (dic->clen > PAGE_SIZE * dic->nr_cpages - COMPRESS_HEADER_SIZE) { 6464c8ff709SChao Yu ret = -EFSCORRUPTED; 6474c8ff709SChao Yu goto out_vunmap_cbuf; 6484c8ff709SChao Yu } 6494c8ff709SChao Yu 6504c8ff709SChao Yu ret = cops->decompress_pages(dic); 6514c8ff709SChao Yu 6524c8ff709SChao Yu out_vunmap_cbuf: 6534c8ff709SChao Yu vunmap(dic->cbuf); 6544c8ff709SChao Yu out_vunmap_rbuf: 6554c8ff709SChao Yu vunmap(dic->rbuf); 65623b1faaaSChao Yu destroy_decompress_ctx: 65723b1faaaSChao Yu if (cops->destroy_decompress_ctx) 65823b1faaaSChao Yu cops->destroy_decompress_ctx(dic); 6594c8ff709SChao Yu out_free_dic: 66079bbefb1SChao Yu if (verity) 661887347a0SChao Yu refcount_set(&dic->ref, dic->nr_cpages); 6624c8ff709SChao Yu if (!verity) 6634c8ff709SChao Yu f2fs_decompress_end_io(dic->rpages, dic->cluster_size, 6644c8ff709SChao Yu ret, false); 6654c8ff709SChao Yu 6664c8ff709SChao Yu trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx, 6674c8ff709SChao Yu dic->clen, ret); 6684c8ff709SChao Yu if (!verity) 6694c8ff709SChao Yu f2fs_free_dic(dic); 6704c8ff709SChao Yu } 6714c8ff709SChao Yu 6724c8ff709SChao Yu static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) 6734c8ff709SChao Yu { 6744c8ff709SChao Yu if (cc->cluster_idx == NULL_CLUSTER) 6754c8ff709SChao Yu return true; 6764c8ff709SChao Yu return cc->cluster_idx == cluster_idx(cc, index); 6774c8ff709SChao Yu } 6784c8ff709SChao Yu 6794c8ff709SChao Yu bool f2fs_cluster_is_empty(struct compress_ctx *cc) 6804c8ff709SChao Yu { 6814c8ff709SChao Yu return cc->nr_rpages == 0; 6824c8ff709SChao Yu } 6834c8ff709SChao Yu 6844c8ff709SChao Yu static bool f2fs_cluster_is_full(struct compress_ctx *cc) 6854c8ff709SChao Yu { 6864c8ff709SChao Yu return cc->cluster_size == cc->nr_rpages; 6874c8ff709SChao Yu } 6884c8ff709SChao Yu 6894c8ff709SChao Yu bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index) 6904c8ff709SChao Yu { 6914c8ff709SChao Yu if (f2fs_cluster_is_empty(cc)) 6924c8ff709SChao Yu return true; 6934c8ff709SChao Yu return is_page_in_cluster(cc, index); 6944c8ff709SChao Yu } 6954c8ff709SChao Yu 6964c8ff709SChao Yu static bool __cluster_may_compress(struct compress_ctx *cc) 6974c8ff709SChao Yu { 6984c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); 6994c8ff709SChao Yu loff_t i_size = i_size_read(cc->inode); 7004c8ff709SChao Yu unsigned nr_pages = DIV_ROUND_UP(i_size, PAGE_SIZE); 7014c8ff709SChao Yu int i; 7024c8ff709SChao Yu 7034c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 7044c8ff709SChao Yu struct page *page = cc->rpages[i]; 7054c8ff709SChao Yu 7064c8ff709SChao Yu f2fs_bug_on(sbi, !page); 7074c8ff709SChao Yu 7084c8ff709SChao Yu if (unlikely(f2fs_cp_error(sbi))) 7094c8ff709SChao Yu return false; 7104c8ff709SChao Yu if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) 7114c8ff709SChao Yu return false; 7124c8ff709SChao Yu 7134c8ff709SChao Yu /* beyond EOF */ 7144c8ff709SChao Yu if (page->index >= nr_pages) 7154c8ff709SChao Yu return false; 7164c8ff709SChao Yu } 7174c8ff709SChao Yu return true; 7184c8ff709SChao Yu } 7194c8ff709SChao Yu 7201a67cbe1SChao Yu static int __f2fs_cluster_blocks(struct compress_ctx *cc, bool compr) 7214c8ff709SChao Yu { 7224c8ff709SChao Yu struct dnode_of_data dn; 7234c8ff709SChao Yu int ret; 7244c8ff709SChao Yu 7254c8ff709SChao Yu set_new_dnode(&dn, cc->inode, NULL, NULL, 0); 7264c8ff709SChao Yu ret = f2fs_get_dnode_of_data(&dn, start_idx_of_cluster(cc), 7274c8ff709SChao Yu LOOKUP_NODE); 7284c8ff709SChao Yu if (ret) { 7294c8ff709SChao Yu if (ret == -ENOENT) 7304c8ff709SChao Yu ret = 0; 7314c8ff709SChao Yu goto fail; 7324c8ff709SChao Yu } 7334c8ff709SChao Yu 7344c8ff709SChao Yu if (dn.data_blkaddr == COMPRESS_ADDR) { 7354c8ff709SChao Yu int i; 7364c8ff709SChao Yu 7374c8ff709SChao Yu ret = 1; 7384c8ff709SChao Yu for (i = 1; i < cc->cluster_size; i++) { 7394c8ff709SChao Yu block_t blkaddr; 7404c8ff709SChao Yu 741a2ced1ceSChao Yu blkaddr = data_blkaddr(dn.inode, 7424c8ff709SChao Yu dn.node_page, dn.ofs_in_node + i); 7431a67cbe1SChao Yu if (compr) { 7441a67cbe1SChao Yu if (__is_valid_data_blkaddr(blkaddr)) 7451a67cbe1SChao Yu ret++; 7461a67cbe1SChao Yu } else { 7474c8ff709SChao Yu if (blkaddr != NULL_ADDR) 7484c8ff709SChao Yu ret++; 7494c8ff709SChao Yu } 7504c8ff709SChao Yu } 7511a67cbe1SChao Yu } 7524c8ff709SChao Yu fail: 7534c8ff709SChao Yu f2fs_put_dnode(&dn); 7544c8ff709SChao Yu return ret; 7554c8ff709SChao Yu } 7564c8ff709SChao Yu 7571a67cbe1SChao Yu /* return # of compressed blocks in compressed cluster */ 7581a67cbe1SChao Yu static int f2fs_compressed_blocks(struct compress_ctx *cc) 7591a67cbe1SChao Yu { 7601a67cbe1SChao Yu return __f2fs_cluster_blocks(cc, true); 7611a67cbe1SChao Yu } 7621a67cbe1SChao Yu 7631a67cbe1SChao Yu /* return # of valid blocks in compressed cluster */ 7641a67cbe1SChao Yu static int f2fs_cluster_blocks(struct compress_ctx *cc, bool compr) 7651a67cbe1SChao Yu { 7661a67cbe1SChao Yu return __f2fs_cluster_blocks(cc, false); 7671a67cbe1SChao Yu } 7681a67cbe1SChao Yu 7694c8ff709SChao Yu int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index) 7704c8ff709SChao Yu { 7714c8ff709SChao Yu struct compress_ctx cc = { 7724c8ff709SChao Yu .inode = inode, 7734c8ff709SChao Yu .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, 7744c8ff709SChao Yu .cluster_size = F2FS_I(inode)->i_cluster_size, 7754c8ff709SChao Yu .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size, 7764c8ff709SChao Yu }; 7774c8ff709SChao Yu 7781a67cbe1SChao Yu return f2fs_cluster_blocks(&cc, false); 7794c8ff709SChao Yu } 7804c8ff709SChao Yu 7814c8ff709SChao Yu static bool cluster_may_compress(struct compress_ctx *cc) 7824c8ff709SChao Yu { 7834c8ff709SChao Yu if (!f2fs_compressed_file(cc->inode)) 7844c8ff709SChao Yu return false; 7854c8ff709SChao Yu if (f2fs_is_atomic_file(cc->inode)) 7864c8ff709SChao Yu return false; 7874c8ff709SChao Yu if (f2fs_is_mmap_file(cc->inode)) 7884c8ff709SChao Yu return false; 7894c8ff709SChao Yu if (!f2fs_cluster_is_full(cc)) 7904c8ff709SChao Yu return false; 7914c8ff709SChao Yu return __cluster_may_compress(cc); 7924c8ff709SChao Yu } 7934c8ff709SChao Yu 7944c8ff709SChao Yu static void set_cluster_writeback(struct compress_ctx *cc) 7954c8ff709SChao Yu { 7964c8ff709SChao Yu int i; 7974c8ff709SChao Yu 7984c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 7994c8ff709SChao Yu if (cc->rpages[i]) 8004c8ff709SChao Yu set_page_writeback(cc->rpages[i]); 8014c8ff709SChao Yu } 8024c8ff709SChao Yu } 8034c8ff709SChao Yu 8044c8ff709SChao Yu static void set_cluster_dirty(struct compress_ctx *cc) 8054c8ff709SChao Yu { 8064c8ff709SChao Yu int i; 8074c8ff709SChao Yu 8084c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) 8094c8ff709SChao Yu if (cc->rpages[i]) 8104c8ff709SChao Yu set_page_dirty(cc->rpages[i]); 8114c8ff709SChao Yu } 8124c8ff709SChao Yu 8134c8ff709SChao Yu static int prepare_compress_overwrite(struct compress_ctx *cc, 8144c8ff709SChao Yu struct page **pagep, pgoff_t index, void **fsdata) 8154c8ff709SChao Yu { 8164c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); 8174c8ff709SChao Yu struct address_space *mapping = cc->inode->i_mapping; 8184c8ff709SChao Yu struct page *page; 8194c8ff709SChao Yu struct dnode_of_data dn; 8204c8ff709SChao Yu sector_t last_block_in_bio; 8214c8ff709SChao Yu unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; 8224c8ff709SChao Yu pgoff_t start_idx = start_idx_of_cluster(cc); 8234c8ff709SChao Yu int i, ret; 8244c8ff709SChao Yu bool prealloc; 8254c8ff709SChao Yu 8264c8ff709SChao Yu retry: 8271a67cbe1SChao Yu ret = f2fs_cluster_blocks(cc, false); 8284c8ff709SChao Yu if (ret <= 0) 8294c8ff709SChao Yu return ret; 8304c8ff709SChao Yu 8314c8ff709SChao Yu /* compressed case */ 8324c8ff709SChao Yu prealloc = (ret < cc->cluster_size); 8334c8ff709SChao Yu 8344c8ff709SChao Yu ret = f2fs_init_compress_ctx(cc); 8354c8ff709SChao Yu if (ret) 8364c8ff709SChao Yu return ret; 8374c8ff709SChao Yu 8384c8ff709SChao Yu /* keep page reference to avoid page reclaim */ 8394c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 8404c8ff709SChao Yu page = f2fs_pagecache_get_page(mapping, start_idx + i, 8414c8ff709SChao Yu fgp_flag, GFP_NOFS); 8424c8ff709SChao Yu if (!page) { 8434c8ff709SChao Yu ret = -ENOMEM; 8444c8ff709SChao Yu goto unlock_pages; 8454c8ff709SChao Yu } 8464c8ff709SChao Yu 8474c8ff709SChao Yu if (PageUptodate(page)) 8484c8ff709SChao Yu unlock_page(page); 8494c8ff709SChao Yu else 8504c8ff709SChao Yu f2fs_compress_ctx_add_page(cc, page); 8514c8ff709SChao Yu } 8524c8ff709SChao Yu 8534c8ff709SChao Yu if (!f2fs_cluster_is_empty(cc)) { 8544c8ff709SChao Yu struct bio *bio = NULL; 8554c8ff709SChao Yu 8564c8ff709SChao Yu ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size, 8570683728aSChao Yu &last_block_in_bio, false, true); 8584c8ff709SChao Yu f2fs_destroy_compress_ctx(cc); 8594c8ff709SChao Yu if (ret) 8604c8ff709SChao Yu goto release_pages; 8614c8ff709SChao Yu if (bio) 8624c8ff709SChao Yu f2fs_submit_bio(sbi, bio, DATA); 8634c8ff709SChao Yu 8644c8ff709SChao Yu ret = f2fs_init_compress_ctx(cc); 8654c8ff709SChao Yu if (ret) 8664c8ff709SChao Yu goto release_pages; 8674c8ff709SChao Yu } 8684c8ff709SChao Yu 8694c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 8704c8ff709SChao Yu f2fs_bug_on(sbi, cc->rpages[i]); 8714c8ff709SChao Yu 8724c8ff709SChao Yu page = find_lock_page(mapping, start_idx + i); 8734c8ff709SChao Yu f2fs_bug_on(sbi, !page); 8744c8ff709SChao Yu 8754c8ff709SChao Yu f2fs_wait_on_page_writeback(page, DATA, true, true); 8764c8ff709SChao Yu 8774c8ff709SChao Yu f2fs_compress_ctx_add_page(cc, page); 8784c8ff709SChao Yu f2fs_put_page(page, 0); 8794c8ff709SChao Yu 8804c8ff709SChao Yu if (!PageUptodate(page)) { 8814c8ff709SChao Yu f2fs_unlock_rpages(cc, i + 1); 8824c8ff709SChao Yu f2fs_put_rpages_mapping(cc, mapping, start_idx, 8834c8ff709SChao Yu cc->cluster_size); 8844c8ff709SChao Yu f2fs_destroy_compress_ctx(cc); 8854c8ff709SChao Yu goto retry; 8864c8ff709SChao Yu } 8874c8ff709SChao Yu } 8884c8ff709SChao Yu 8894c8ff709SChao Yu if (prealloc) { 8904c8ff709SChao Yu __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true); 8914c8ff709SChao Yu 8924c8ff709SChao Yu set_new_dnode(&dn, cc->inode, NULL, NULL, 0); 8934c8ff709SChao Yu 8944c8ff709SChao Yu for (i = cc->cluster_size - 1; i > 0; i--) { 8954c8ff709SChao Yu ret = f2fs_get_block(&dn, start_idx + i); 8964c8ff709SChao Yu if (ret) { 8974c8ff709SChao Yu i = cc->cluster_size; 8984c8ff709SChao Yu break; 8994c8ff709SChao Yu } 9004c8ff709SChao Yu 9014c8ff709SChao Yu if (dn.data_blkaddr != NEW_ADDR) 9024c8ff709SChao Yu break; 9034c8ff709SChao Yu } 9044c8ff709SChao Yu 9054c8ff709SChao Yu __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false); 9064c8ff709SChao Yu } 9074c8ff709SChao Yu 9084c8ff709SChao Yu if (likely(!ret)) { 9094c8ff709SChao Yu *fsdata = cc->rpages; 9104c8ff709SChao Yu *pagep = cc->rpages[offset_in_cluster(cc, index)]; 9114c8ff709SChao Yu return cc->cluster_size; 9124c8ff709SChao Yu } 9134c8ff709SChao Yu 9144c8ff709SChao Yu unlock_pages: 9154c8ff709SChao Yu f2fs_unlock_rpages(cc, i); 9164c8ff709SChao Yu release_pages: 9174c8ff709SChao Yu f2fs_put_rpages_mapping(cc, mapping, start_idx, i); 9184c8ff709SChao Yu f2fs_destroy_compress_ctx(cc); 9194c8ff709SChao Yu return ret; 9204c8ff709SChao Yu } 9214c8ff709SChao Yu 9224c8ff709SChao Yu int f2fs_prepare_compress_overwrite(struct inode *inode, 9234c8ff709SChao Yu struct page **pagep, pgoff_t index, void **fsdata) 9244c8ff709SChao Yu { 9254c8ff709SChao Yu struct compress_ctx cc = { 9264c8ff709SChao Yu .inode = inode, 9274c8ff709SChao Yu .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, 9284c8ff709SChao Yu .cluster_size = F2FS_I(inode)->i_cluster_size, 9294c8ff709SChao Yu .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size, 9304c8ff709SChao Yu .rpages = NULL, 9314c8ff709SChao Yu .nr_rpages = 0, 9324c8ff709SChao Yu }; 9334c8ff709SChao Yu 9344c8ff709SChao Yu return prepare_compress_overwrite(&cc, pagep, index, fsdata); 9354c8ff709SChao Yu } 9364c8ff709SChao Yu 9374c8ff709SChao Yu bool f2fs_compress_write_end(struct inode *inode, void *fsdata, 9384c8ff709SChao Yu pgoff_t index, unsigned copied) 9394c8ff709SChao Yu 9404c8ff709SChao Yu { 9414c8ff709SChao Yu struct compress_ctx cc = { 9424c8ff709SChao Yu .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, 9434c8ff709SChao Yu .cluster_size = F2FS_I(inode)->i_cluster_size, 9444c8ff709SChao Yu .rpages = fsdata, 9454c8ff709SChao Yu }; 9464c8ff709SChao Yu bool first_index = (index == cc.rpages[0]->index); 9474c8ff709SChao Yu 9484c8ff709SChao Yu if (copied) 9494c8ff709SChao Yu set_cluster_dirty(&cc); 9504c8ff709SChao Yu 9514c8ff709SChao Yu f2fs_put_rpages_wbc(&cc, NULL, false, 1); 9524c8ff709SChao Yu f2fs_destroy_compress_ctx(&cc); 9534c8ff709SChao Yu 9544c8ff709SChao Yu return first_index; 9554c8ff709SChao Yu } 9564c8ff709SChao Yu 9574c8ff709SChao Yu static int f2fs_write_compressed_pages(struct compress_ctx *cc, 9584c8ff709SChao Yu int *submitted, 9594c8ff709SChao Yu struct writeback_control *wbc, 9604c8ff709SChao Yu enum iostat_type io_type) 9614c8ff709SChao Yu { 9624c8ff709SChao Yu struct inode *inode = cc->inode; 9634c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 9644c8ff709SChao Yu struct f2fs_inode_info *fi = F2FS_I(inode); 9654c8ff709SChao Yu struct f2fs_io_info fio = { 9664c8ff709SChao Yu .sbi = sbi, 9674c8ff709SChao Yu .ino = cc->inode->i_ino, 9684c8ff709SChao Yu .type = DATA, 9694c8ff709SChao Yu .op = REQ_OP_WRITE, 9704c8ff709SChao Yu .op_flags = wbc_to_write_flags(wbc), 9714c8ff709SChao Yu .old_blkaddr = NEW_ADDR, 9724c8ff709SChao Yu .page = NULL, 9734c8ff709SChao Yu .encrypted_page = NULL, 9744c8ff709SChao Yu .compressed_page = NULL, 9754c8ff709SChao Yu .submitted = false, 9764c8ff709SChao Yu .io_type = io_type, 9774c8ff709SChao Yu .io_wbc = wbc, 9784c8ff709SChao Yu .encrypted = f2fs_encrypted_file(cc->inode), 9794c8ff709SChao Yu }; 9804c8ff709SChao Yu struct dnode_of_data dn; 9814c8ff709SChao Yu struct node_info ni; 9824c8ff709SChao Yu struct compress_io_ctx *cic; 9834c8ff709SChao Yu pgoff_t start_idx = start_idx_of_cluster(cc); 9844c8ff709SChao Yu unsigned int last_index = cc->cluster_size - 1; 9854c8ff709SChao Yu loff_t psize; 9864c8ff709SChao Yu int i, err; 9874c8ff709SChao Yu 988df77fbd8SChao Yu if (!f2fs_trylock_op(sbi)) 989df77fbd8SChao Yu return -EAGAIN; 9904c8ff709SChao Yu 991df77fbd8SChao Yu set_new_dnode(&dn, cc->inode, NULL, NULL, 0); 9924c8ff709SChao Yu 9934c8ff709SChao Yu err = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); 9944c8ff709SChao Yu if (err) 9954c8ff709SChao Yu goto out_unlock_op; 9964c8ff709SChao Yu 9974c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 998a2ced1ceSChao Yu if (data_blkaddr(dn.inode, dn.node_page, 9994c8ff709SChao Yu dn.ofs_in_node + i) == NULL_ADDR) 10004c8ff709SChao Yu goto out_put_dnode; 10014c8ff709SChao Yu } 10024c8ff709SChao Yu 10034c8ff709SChao Yu psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT; 10044c8ff709SChao Yu 10054c8ff709SChao Yu err = f2fs_get_node_info(fio.sbi, dn.nid, &ni); 10064c8ff709SChao Yu if (err) 10074c8ff709SChao Yu goto out_put_dnode; 10084c8ff709SChao Yu 10094c8ff709SChao Yu fio.version = ni.version; 10104c8ff709SChao Yu 10114c8ff709SChao Yu cic = f2fs_kzalloc(sbi, sizeof(struct compress_io_ctx), GFP_NOFS); 10124c8ff709SChao Yu if (!cic) 10134c8ff709SChao Yu goto out_put_dnode; 10144c8ff709SChao Yu 10154c8ff709SChao Yu cic->magic = F2FS_COMPRESSED_PAGE_MAGIC; 10164c8ff709SChao Yu cic->inode = inode; 1017887347a0SChao Yu refcount_set(&cic->ref, cc->nr_cpages); 10184c8ff709SChao Yu cic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) << 10194c8ff709SChao Yu cc->log_cluster_size, GFP_NOFS); 10204c8ff709SChao Yu if (!cic->rpages) 10214c8ff709SChao Yu goto out_put_cic; 10224c8ff709SChao Yu 10234c8ff709SChao Yu cic->nr_rpages = cc->cluster_size; 10244c8ff709SChao Yu 10254c8ff709SChao Yu for (i = 0; i < cc->nr_cpages; i++) { 10264c8ff709SChao Yu f2fs_set_compressed_page(cc->cpages[i], inode, 1027887347a0SChao Yu cc->rpages[i + 1]->index, cic); 10284c8ff709SChao Yu fio.compressed_page = cc->cpages[i]; 10294c8ff709SChao Yu if (fio.encrypted) { 10304c8ff709SChao Yu fio.page = cc->rpages[i + 1]; 10314c8ff709SChao Yu err = f2fs_encrypt_one_page(&fio); 10324c8ff709SChao Yu if (err) 10334c8ff709SChao Yu goto out_destroy_crypt; 10344c8ff709SChao Yu cc->cpages[i] = fio.encrypted_page; 10354c8ff709SChao Yu } 10364c8ff709SChao Yu } 10374c8ff709SChao Yu 10384c8ff709SChao Yu set_cluster_writeback(cc); 10394c8ff709SChao Yu 10404c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) 10414c8ff709SChao Yu cic->rpages[i] = cc->rpages[i]; 10424c8ff709SChao Yu 10434c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++, dn.ofs_in_node++) { 10444c8ff709SChao Yu block_t blkaddr; 10454c8ff709SChao Yu 1046a2ced1ceSChao Yu blkaddr = f2fs_data_blkaddr(&dn); 104795978caaSChao Yu fio.page = cc->rpages[i]; 10484c8ff709SChao Yu fio.old_blkaddr = blkaddr; 10494c8ff709SChao Yu 10504c8ff709SChao Yu /* cluster header */ 10514c8ff709SChao Yu if (i == 0) { 10524c8ff709SChao Yu if (blkaddr == COMPRESS_ADDR) 10534c8ff709SChao Yu fio.compr_blocks++; 10544c8ff709SChao Yu if (__is_valid_data_blkaddr(blkaddr)) 10554c8ff709SChao Yu f2fs_invalidate_blocks(sbi, blkaddr); 10564c8ff709SChao Yu f2fs_update_data_blkaddr(&dn, COMPRESS_ADDR); 10574c8ff709SChao Yu goto unlock_continue; 10584c8ff709SChao Yu } 10594c8ff709SChao Yu 10604c8ff709SChao Yu if (fio.compr_blocks && __is_valid_data_blkaddr(blkaddr)) 10614c8ff709SChao Yu fio.compr_blocks++; 10624c8ff709SChao Yu 10634c8ff709SChao Yu if (i > cc->nr_cpages) { 10644c8ff709SChao Yu if (__is_valid_data_blkaddr(blkaddr)) { 10654c8ff709SChao Yu f2fs_invalidate_blocks(sbi, blkaddr); 10664c8ff709SChao Yu f2fs_update_data_blkaddr(&dn, NEW_ADDR); 10674c8ff709SChao Yu } 10684c8ff709SChao Yu goto unlock_continue; 10694c8ff709SChao Yu } 10704c8ff709SChao Yu 10714c8ff709SChao Yu f2fs_bug_on(fio.sbi, blkaddr == NULL_ADDR); 10724c8ff709SChao Yu 10734c8ff709SChao Yu if (fio.encrypted) 10744c8ff709SChao Yu fio.encrypted_page = cc->cpages[i - 1]; 10754c8ff709SChao Yu else 10764c8ff709SChao Yu fio.compressed_page = cc->cpages[i - 1]; 10774c8ff709SChao Yu 10784c8ff709SChao Yu cc->cpages[i - 1] = NULL; 10794c8ff709SChao Yu f2fs_outplace_write_data(&dn, &fio); 10804c8ff709SChao Yu (*submitted)++; 10814c8ff709SChao Yu unlock_continue: 10824c8ff709SChao Yu inode_dec_dirty_pages(cc->inode); 10834c8ff709SChao Yu unlock_page(fio.page); 10844c8ff709SChao Yu } 10854c8ff709SChao Yu 10864c8ff709SChao Yu if (fio.compr_blocks) 10874c8ff709SChao Yu f2fs_i_compr_blocks_update(inode, fio.compr_blocks - 1, false); 10884c8ff709SChao Yu f2fs_i_compr_blocks_update(inode, cc->nr_cpages, true); 10894c8ff709SChao Yu 10904c8ff709SChao Yu set_inode_flag(cc->inode, FI_APPEND_WRITE); 10914c8ff709SChao Yu if (cc->cluster_idx == 0) 10924c8ff709SChao Yu set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); 10934c8ff709SChao Yu 10944c8ff709SChao Yu f2fs_put_dnode(&dn); 10954c8ff709SChao Yu f2fs_unlock_op(sbi); 10964c8ff709SChao Yu 1097c10c9820SChao Yu spin_lock(&fi->i_size_lock); 10984c8ff709SChao Yu if (fi->last_disk_size < psize) 10994c8ff709SChao Yu fi->last_disk_size = psize; 1100c10c9820SChao Yu spin_unlock(&fi->i_size_lock); 11014c8ff709SChao Yu 11024c8ff709SChao Yu f2fs_put_rpages(cc); 11034c8ff709SChao Yu f2fs_destroy_compress_ctx(cc); 11044c8ff709SChao Yu return 0; 11054c8ff709SChao Yu 11064c8ff709SChao Yu out_destroy_crypt: 11074c8ff709SChao Yu kfree(cic->rpages); 11084c8ff709SChao Yu 11094c8ff709SChao Yu for (--i; i >= 0; i--) 11104c8ff709SChao Yu fscrypt_finalize_bounce_page(&cc->cpages[i]); 11114c8ff709SChao Yu for (i = 0; i < cc->nr_cpages; i++) { 11124c8ff709SChao Yu if (!cc->cpages[i]) 11134c8ff709SChao Yu continue; 11144c8ff709SChao Yu f2fs_put_page(cc->cpages[i], 1); 11154c8ff709SChao Yu } 11164c8ff709SChao Yu out_put_cic: 11174c8ff709SChao Yu kfree(cic); 11184c8ff709SChao Yu out_put_dnode: 11194c8ff709SChao Yu f2fs_put_dnode(&dn); 11204c8ff709SChao Yu out_unlock_op: 11214c8ff709SChao Yu f2fs_unlock_op(sbi); 11224c8ff709SChao Yu return -EAGAIN; 11234c8ff709SChao Yu } 11244c8ff709SChao Yu 11254c8ff709SChao Yu void f2fs_compress_write_end_io(struct bio *bio, struct page *page) 11264c8ff709SChao Yu { 11274c8ff709SChao Yu struct f2fs_sb_info *sbi = bio->bi_private; 11284c8ff709SChao Yu struct compress_io_ctx *cic = 11294c8ff709SChao Yu (struct compress_io_ctx *)page_private(page); 11304c8ff709SChao Yu int i; 11314c8ff709SChao Yu 11324c8ff709SChao Yu if (unlikely(bio->bi_status)) 11334c8ff709SChao Yu mapping_set_error(cic->inode->i_mapping, -EIO); 11344c8ff709SChao Yu 11354c8ff709SChao Yu f2fs_put_compressed_page(page); 11364c8ff709SChao Yu 11374c8ff709SChao Yu dec_page_count(sbi, F2FS_WB_DATA); 11384c8ff709SChao Yu 11394c8ff709SChao Yu if (refcount_dec_not_one(&cic->ref)) 11404c8ff709SChao Yu return; 11414c8ff709SChao Yu 11424c8ff709SChao Yu for (i = 0; i < cic->nr_rpages; i++) { 11434c8ff709SChao Yu WARN_ON(!cic->rpages[i]); 11444c8ff709SChao Yu clear_cold_data(cic->rpages[i]); 11454c8ff709SChao Yu end_page_writeback(cic->rpages[i]); 11464c8ff709SChao Yu } 11474c8ff709SChao Yu 11484c8ff709SChao Yu kfree(cic->rpages); 11494c8ff709SChao Yu kfree(cic); 11504c8ff709SChao Yu } 11514c8ff709SChao Yu 11524c8ff709SChao Yu static int f2fs_write_raw_pages(struct compress_ctx *cc, 11534c8ff709SChao Yu int *submitted, 11544c8ff709SChao Yu struct writeback_control *wbc, 11554c8ff709SChao Yu enum iostat_type io_type) 11564c8ff709SChao Yu { 11574c8ff709SChao Yu struct address_space *mapping = cc->inode->i_mapping; 11584c8ff709SChao Yu int _submitted, compr_blocks, ret; 11594c8ff709SChao Yu int i = -1, err = 0; 11604c8ff709SChao Yu 11614c8ff709SChao Yu compr_blocks = f2fs_compressed_blocks(cc); 11624c8ff709SChao Yu if (compr_blocks < 0) { 11634c8ff709SChao Yu err = compr_blocks; 11644c8ff709SChao Yu goto out_err; 11654c8ff709SChao Yu } 11664c8ff709SChao Yu 11674c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 11684c8ff709SChao Yu if (!cc->rpages[i]) 11694c8ff709SChao Yu continue; 11704c8ff709SChao Yu retry_write: 11714c8ff709SChao Yu if (cc->rpages[i]->mapping != mapping) { 11724c8ff709SChao Yu unlock_page(cc->rpages[i]); 11734c8ff709SChao Yu continue; 11744c8ff709SChao Yu } 11754c8ff709SChao Yu 11764c8ff709SChao Yu BUG_ON(!PageLocked(cc->rpages[i])); 11774c8ff709SChao Yu 11784c8ff709SChao Yu ret = f2fs_write_single_data_page(cc->rpages[i], &_submitted, 11794c8ff709SChao Yu NULL, NULL, wbc, io_type, 11804c8ff709SChao Yu compr_blocks); 11814c8ff709SChao Yu if (ret) { 11824c8ff709SChao Yu if (ret == AOP_WRITEPAGE_ACTIVATE) { 11834c8ff709SChao Yu unlock_page(cc->rpages[i]); 11844c8ff709SChao Yu ret = 0; 11854c8ff709SChao Yu } else if (ret == -EAGAIN) { 1186466357dcSChao Yu /* 1187466357dcSChao Yu * for quota file, just redirty left pages to 1188466357dcSChao Yu * avoid deadlock caused by cluster update race 1189466357dcSChao Yu * from foreground operation. 1190466357dcSChao Yu */ 1191466357dcSChao Yu if (IS_NOQUOTA(cc->inode)) { 1192466357dcSChao Yu err = 0; 1193466357dcSChao Yu goto out_err; 1194466357dcSChao Yu } 11954c8ff709SChao Yu ret = 0; 11964c8ff709SChao Yu cond_resched(); 11975df7731fSChao Yu congestion_wait(BLK_RW_ASYNC, 11985df7731fSChao Yu DEFAULT_IO_TIMEOUT); 11994c8ff709SChao Yu lock_page(cc->rpages[i]); 12004c8ff709SChao Yu clear_page_dirty_for_io(cc->rpages[i]); 12014c8ff709SChao Yu goto retry_write; 12024c8ff709SChao Yu } 12034c8ff709SChao Yu err = ret; 1204466357dcSChao Yu goto out_err; 12054c8ff709SChao Yu } 12064c8ff709SChao Yu 12074c8ff709SChao Yu *submitted += _submitted; 12084c8ff709SChao Yu } 12094c8ff709SChao Yu return 0; 12104c8ff709SChao Yu out_err: 12114c8ff709SChao Yu for (++i; i < cc->cluster_size; i++) { 12124c8ff709SChao Yu if (!cc->rpages[i]) 12134c8ff709SChao Yu continue; 12144c8ff709SChao Yu redirty_page_for_writepage(wbc, cc->rpages[i]); 12154c8ff709SChao Yu unlock_page(cc->rpages[i]); 12164c8ff709SChao Yu } 12174c8ff709SChao Yu return err; 12184c8ff709SChao Yu } 12194c8ff709SChao Yu 12204c8ff709SChao Yu int f2fs_write_multi_pages(struct compress_ctx *cc, 12214c8ff709SChao Yu int *submitted, 12224c8ff709SChao Yu struct writeback_control *wbc, 12234c8ff709SChao Yu enum iostat_type io_type) 12244c8ff709SChao Yu { 12254c8ff709SChao Yu struct f2fs_inode_info *fi = F2FS_I(cc->inode); 12264c8ff709SChao Yu const struct f2fs_compress_ops *cops = 12274c8ff709SChao Yu f2fs_cops[fi->i_compress_algorithm]; 12284c8ff709SChao Yu int err; 12294c8ff709SChao Yu 12304c8ff709SChao Yu *submitted = 0; 12314c8ff709SChao Yu if (cluster_may_compress(cc)) { 12324c8ff709SChao Yu err = f2fs_compress_pages(cc); 12334c8ff709SChao Yu if (err == -EAGAIN) { 12344c8ff709SChao Yu goto write; 12354c8ff709SChao Yu } else if (err) { 12364c8ff709SChao Yu f2fs_put_rpages_wbc(cc, wbc, true, 1); 12374c8ff709SChao Yu goto destroy_out; 12384c8ff709SChao Yu } 12394c8ff709SChao Yu 12404c8ff709SChao Yu err = f2fs_write_compressed_pages(cc, submitted, 12414c8ff709SChao Yu wbc, io_type); 12424c8ff709SChao Yu cops->destroy_compress_ctx(cc); 12434c8ff709SChao Yu if (!err) 12444c8ff709SChao Yu return 0; 12454c8ff709SChao Yu f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN); 12464c8ff709SChao Yu } 12474c8ff709SChao Yu write: 12484c8ff709SChao Yu f2fs_bug_on(F2FS_I_SB(cc->inode), *submitted); 12494c8ff709SChao Yu 12504c8ff709SChao Yu err = f2fs_write_raw_pages(cc, submitted, wbc, io_type); 12514c8ff709SChao Yu f2fs_put_rpages_wbc(cc, wbc, false, 0); 12524c8ff709SChao Yu destroy_out: 12534c8ff709SChao Yu f2fs_destroy_compress_ctx(cc); 12544c8ff709SChao Yu return err; 12554c8ff709SChao Yu } 12564c8ff709SChao Yu 12574c8ff709SChao Yu struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) 12584c8ff709SChao Yu { 12594c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); 12604c8ff709SChao Yu struct decompress_io_ctx *dic; 12614c8ff709SChao Yu pgoff_t start_idx = start_idx_of_cluster(cc); 12624c8ff709SChao Yu int i; 12634c8ff709SChao Yu 12644c8ff709SChao Yu dic = f2fs_kzalloc(sbi, sizeof(struct decompress_io_ctx), GFP_NOFS); 12654c8ff709SChao Yu if (!dic) 12664c8ff709SChao Yu return ERR_PTR(-ENOMEM); 12674c8ff709SChao Yu 12684c8ff709SChao Yu dic->rpages = f2fs_kzalloc(sbi, sizeof(struct page *) << 12694c8ff709SChao Yu cc->log_cluster_size, GFP_NOFS); 12704c8ff709SChao Yu if (!dic->rpages) { 12714c8ff709SChao Yu kfree(dic); 12724c8ff709SChao Yu return ERR_PTR(-ENOMEM); 12734c8ff709SChao Yu } 12744c8ff709SChao Yu 12754c8ff709SChao Yu dic->magic = F2FS_COMPRESSED_PAGE_MAGIC; 12764c8ff709SChao Yu dic->inode = cc->inode; 1277887347a0SChao Yu refcount_set(&dic->ref, cc->nr_cpages); 12784c8ff709SChao Yu dic->cluster_idx = cc->cluster_idx; 12794c8ff709SChao Yu dic->cluster_size = cc->cluster_size; 12804c8ff709SChao Yu dic->log_cluster_size = cc->log_cluster_size; 12814c8ff709SChao Yu dic->nr_cpages = cc->nr_cpages; 12824c8ff709SChao Yu dic->failed = false; 12834c8ff709SChao Yu 12844c8ff709SChao Yu for (i = 0; i < dic->cluster_size; i++) 12854c8ff709SChao Yu dic->rpages[i] = cc->rpages[i]; 12864c8ff709SChao Yu dic->nr_rpages = cc->cluster_size; 12874c8ff709SChao Yu 12884c8ff709SChao Yu dic->cpages = f2fs_kzalloc(sbi, sizeof(struct page *) * 12894c8ff709SChao Yu dic->nr_cpages, GFP_NOFS); 12904c8ff709SChao Yu if (!dic->cpages) 12914c8ff709SChao Yu goto out_free; 12924c8ff709SChao Yu 12934c8ff709SChao Yu for (i = 0; i < dic->nr_cpages; i++) { 12944c8ff709SChao Yu struct page *page; 12954c8ff709SChao Yu 12964c8ff709SChao Yu page = f2fs_grab_page(); 12974c8ff709SChao Yu if (!page) 12984c8ff709SChao Yu goto out_free; 12994c8ff709SChao Yu 13004c8ff709SChao Yu f2fs_set_compressed_page(page, cc->inode, 1301887347a0SChao Yu start_idx + i + 1, dic); 13024c8ff709SChao Yu dic->cpages[i] = page; 13034c8ff709SChao Yu } 13044c8ff709SChao Yu 13054c8ff709SChao Yu dic->tpages = f2fs_kzalloc(sbi, sizeof(struct page *) * 13064c8ff709SChao Yu dic->cluster_size, GFP_NOFS); 13074c8ff709SChao Yu if (!dic->tpages) 13084c8ff709SChao Yu goto out_free; 13094c8ff709SChao Yu 13104c8ff709SChao Yu for (i = 0; i < dic->cluster_size; i++) { 13114c8ff709SChao Yu if (cc->rpages[i]) 13124c8ff709SChao Yu continue; 13134c8ff709SChao Yu 13144c8ff709SChao Yu dic->tpages[i] = f2fs_grab_page(); 13154c8ff709SChao Yu if (!dic->tpages[i]) 13164c8ff709SChao Yu goto out_free; 13174c8ff709SChao Yu } 13184c8ff709SChao Yu 13194c8ff709SChao Yu for (i = 0; i < dic->cluster_size; i++) { 13204c8ff709SChao Yu if (dic->tpages[i]) 13214c8ff709SChao Yu continue; 13224c8ff709SChao Yu dic->tpages[i] = cc->rpages[i]; 13234c8ff709SChao Yu } 13244c8ff709SChao Yu 13254c8ff709SChao Yu return dic; 13264c8ff709SChao Yu 13274c8ff709SChao Yu out_free: 13284c8ff709SChao Yu f2fs_free_dic(dic); 13294c8ff709SChao Yu return ERR_PTR(-ENOMEM); 13304c8ff709SChao Yu } 13314c8ff709SChao Yu 13324c8ff709SChao Yu void f2fs_free_dic(struct decompress_io_ctx *dic) 13334c8ff709SChao Yu { 13344c8ff709SChao Yu int i; 13354c8ff709SChao Yu 13364c8ff709SChao Yu if (dic->tpages) { 13374c8ff709SChao Yu for (i = 0; i < dic->cluster_size; i++) { 13384c8ff709SChao Yu if (dic->rpages[i]) 13394c8ff709SChao Yu continue; 134061fbae2bSChao Yu unlock_page(dic->tpages[i]); 134161fbae2bSChao Yu put_page(dic->tpages[i]); 13424c8ff709SChao Yu } 13434c8ff709SChao Yu kfree(dic->tpages); 13444c8ff709SChao Yu } 13454c8ff709SChao Yu 13464c8ff709SChao Yu if (dic->cpages) { 13474c8ff709SChao Yu for (i = 0; i < dic->nr_cpages; i++) { 13484c8ff709SChao Yu if (!dic->cpages[i]) 13494c8ff709SChao Yu continue; 13504c8ff709SChao Yu f2fs_put_compressed_page(dic->cpages[i]); 13514c8ff709SChao Yu } 13524c8ff709SChao Yu kfree(dic->cpages); 13534c8ff709SChao Yu } 13544c8ff709SChao Yu 13554c8ff709SChao Yu kfree(dic->rpages); 13564c8ff709SChao Yu kfree(dic); 13574c8ff709SChao Yu } 13584c8ff709SChao Yu 13594c8ff709SChao Yu void f2fs_decompress_end_io(struct page **rpages, 13604c8ff709SChao Yu unsigned int cluster_size, bool err, bool verity) 13614c8ff709SChao Yu { 13624c8ff709SChao Yu int i; 13634c8ff709SChao Yu 13644c8ff709SChao Yu for (i = 0; i < cluster_size; i++) { 13654c8ff709SChao Yu struct page *rpage = rpages[i]; 13664c8ff709SChao Yu 13674c8ff709SChao Yu if (!rpage) 13684c8ff709SChao Yu continue; 13694c8ff709SChao Yu 137023c51bedSChao Yu if (err || PageError(rpage)) 137123c51bedSChao Yu goto clear_uptodate; 137223c51bedSChao Yu 137323c51bedSChao Yu if (!verity || fsverity_verify_page(rpage)) { 137423c51bedSChao Yu SetPageUptodate(rpage); 137523c51bedSChao Yu goto unlock; 137623c51bedSChao Yu } 137723c51bedSChao Yu clear_uptodate: 13784c8ff709SChao Yu ClearPageUptodate(rpage); 13794c8ff709SChao Yu ClearPageError(rpage); 138023c51bedSChao Yu unlock: 13814c8ff709SChao Yu unlock_page(rpage); 13824c8ff709SChao Yu } 13834c8ff709SChao Yu } 1384