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> 10e41d12f5SChristoph Hellwig #include <linux/moduleparam.h> 114c8ff709SChao Yu #include <linux/writeback.h> 124c8ff709SChao Yu #include <linux/backing-dev.h> 134c8ff709SChao Yu #include <linux/lzo.h> 144c8ff709SChao Yu #include <linux/lz4.h> 1550cfa66fSChao Yu #include <linux/zstd.h> 166ce19affSChao Yu #include <linux/pagevec.h> 174c8ff709SChao Yu 184c8ff709SChao Yu #include "f2fs.h" 194c8ff709SChao Yu #include "node.h" 206ce19affSChao Yu #include "segment.h" 214c8ff709SChao Yu #include <trace/events/f2fs.h> 224c8ff709SChao Yu 23c68d6c88SChao Yu static struct kmem_cache *cic_entry_slab; 24c68d6c88SChao Yu static struct kmem_cache *dic_entry_slab; 25c68d6c88SChao Yu 2631083031SChao Yu static void *page_array_alloc(struct inode *inode, int nr) 2731083031SChao Yu { 2831083031SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 2931083031SChao Yu unsigned int size = sizeof(struct page *) * nr; 3031083031SChao Yu 3131083031SChao Yu if (likely(size <= sbi->page_array_slab_size)) 3232410577SChao Yu return f2fs_kmem_cache_alloc(sbi->page_array_slab, 3332410577SChao Yu GFP_F2FS_ZERO, false, F2FS_I_SB(inode)); 3431083031SChao Yu return f2fs_kzalloc(sbi, size, GFP_NOFS); 3531083031SChao Yu } 3631083031SChao Yu 3731083031SChao Yu static void page_array_free(struct inode *inode, void *pages, int nr) 3831083031SChao Yu { 3931083031SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 4031083031SChao Yu unsigned int size = sizeof(struct page *) * nr; 4131083031SChao Yu 4231083031SChao Yu if (!pages) 4331083031SChao Yu return; 4431083031SChao Yu 4531083031SChao Yu if (likely(size <= sbi->page_array_slab_size)) 4631083031SChao Yu kmem_cache_free(sbi->page_array_slab, pages); 4731083031SChao Yu else 4831083031SChao Yu kfree(pages); 4931083031SChao Yu } 5031083031SChao Yu 514c8ff709SChao Yu struct f2fs_compress_ops { 524c8ff709SChao Yu int (*init_compress_ctx)(struct compress_ctx *cc); 534c8ff709SChao Yu void (*destroy_compress_ctx)(struct compress_ctx *cc); 544c8ff709SChao Yu int (*compress_pages)(struct compress_ctx *cc); 5523b1faaaSChao Yu int (*init_decompress_ctx)(struct decompress_io_ctx *dic); 5623b1faaaSChao Yu void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic); 574c8ff709SChao Yu int (*decompress_pages)(struct decompress_io_ctx *dic); 584c8ff709SChao Yu }; 594c8ff709SChao Yu 604c8ff709SChao Yu static unsigned int offset_in_cluster(struct compress_ctx *cc, pgoff_t index) 614c8ff709SChao Yu { 624c8ff709SChao Yu return index & (cc->cluster_size - 1); 634c8ff709SChao Yu } 644c8ff709SChao Yu 654c8ff709SChao Yu static pgoff_t cluster_idx(struct compress_ctx *cc, pgoff_t index) 664c8ff709SChao Yu { 674c8ff709SChao Yu return index >> cc->log_cluster_size; 684c8ff709SChao Yu } 694c8ff709SChao Yu 704c8ff709SChao Yu static pgoff_t start_idx_of_cluster(struct compress_ctx *cc) 714c8ff709SChao Yu { 724c8ff709SChao Yu return cc->cluster_idx << cc->log_cluster_size; 734c8ff709SChao Yu } 744c8ff709SChao Yu 754c8ff709SChao Yu bool f2fs_is_compressed_page(struct page *page) 764c8ff709SChao Yu { 774c8ff709SChao Yu if (!PagePrivate(page)) 784c8ff709SChao Yu return false; 794c8ff709SChao Yu if (!page_private(page)) 804c8ff709SChao Yu return false; 81b763f3beSChao Yu if (page_private_nonpointer(page)) 824c8ff709SChao Yu return false; 8329b993c7SYu Changchun 844c8ff709SChao Yu f2fs_bug_on(F2FS_M_SB(page->mapping), 854c8ff709SChao Yu *((u32 *)page_private(page)) != F2FS_COMPRESSED_PAGE_MAGIC); 864c8ff709SChao Yu return true; 874c8ff709SChao Yu } 884c8ff709SChao Yu 894c8ff709SChao Yu static void f2fs_set_compressed_page(struct page *page, 90887347a0SChao Yu struct inode *inode, pgoff_t index, void *data) 914c8ff709SChao Yu { 92b763f3beSChao Yu attach_page_private(page, (void *)data); 934c8ff709SChao Yu 944c8ff709SChao Yu /* i_crypto_info and iv index */ 954c8ff709SChao Yu page->index = index; 964c8ff709SChao Yu page->mapping = inode->i_mapping; 974c8ff709SChao Yu } 984c8ff709SChao Yu 994c8ff709SChao Yu static void f2fs_drop_rpages(struct compress_ctx *cc, int len, bool unlock) 1004c8ff709SChao Yu { 1014c8ff709SChao Yu int i; 1024c8ff709SChao Yu 1034c8ff709SChao Yu for (i = 0; i < len; i++) { 1044c8ff709SChao Yu if (!cc->rpages[i]) 1054c8ff709SChao Yu continue; 1064c8ff709SChao Yu if (unlock) 1074c8ff709SChao Yu unlock_page(cc->rpages[i]); 1084c8ff709SChao Yu else 1094c8ff709SChao Yu put_page(cc->rpages[i]); 1104c8ff709SChao Yu } 1114c8ff709SChao Yu } 1124c8ff709SChao Yu 1134c8ff709SChao Yu static void f2fs_put_rpages(struct compress_ctx *cc) 1144c8ff709SChao Yu { 1154c8ff709SChao Yu f2fs_drop_rpages(cc, cc->cluster_size, false); 1164c8ff709SChao Yu } 1174c8ff709SChao Yu 1184c8ff709SChao Yu static void f2fs_unlock_rpages(struct compress_ctx *cc, int len) 1194c8ff709SChao Yu { 1204c8ff709SChao Yu f2fs_drop_rpages(cc, len, true); 1214c8ff709SChao Yu } 1224c8ff709SChao Yu 1234c8ff709SChao Yu static void f2fs_put_rpages_wbc(struct compress_ctx *cc, 1244c8ff709SChao Yu struct writeback_control *wbc, bool redirty, int unlock) 1254c8ff709SChao Yu { 1264c8ff709SChao Yu unsigned int i; 1274c8ff709SChao Yu 1284c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 1294c8ff709SChao Yu if (!cc->rpages[i]) 1304c8ff709SChao Yu continue; 1314c8ff709SChao Yu if (redirty) 1324c8ff709SChao Yu redirty_page_for_writepage(wbc, cc->rpages[i]); 1334c8ff709SChao Yu f2fs_put_page(cc->rpages[i], unlock); 1344c8ff709SChao Yu } 1354c8ff709SChao Yu } 1364c8ff709SChao Yu 1374c8ff709SChao Yu struct page *f2fs_compress_control_page(struct page *page) 1384c8ff709SChao Yu { 1394c8ff709SChao Yu return ((struct compress_io_ctx *)page_private(page))->rpages[0]; 1404c8ff709SChao Yu } 1414c8ff709SChao Yu 1424c8ff709SChao Yu int f2fs_init_compress_ctx(struct compress_ctx *cc) 1434c8ff709SChao Yu { 144adfc6943SJaegeuk Kim if (cc->rpages) 1454c8ff709SChao Yu return 0; 1464c8ff709SChao Yu 14731083031SChao Yu cc->rpages = page_array_alloc(cc->inode, cc->cluster_size); 1484c8ff709SChao Yu return cc->rpages ? 0 : -ENOMEM; 1494c8ff709SChao Yu } 1504c8ff709SChao Yu 1518bfbfb0dSChao Yu void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse) 1524c8ff709SChao Yu { 15331083031SChao Yu page_array_free(cc->inode, cc->rpages, cc->cluster_size); 1544c8ff709SChao Yu cc->rpages = NULL; 1554c8ff709SChao Yu cc->nr_rpages = 0; 1564c8ff709SChao Yu cc->nr_cpages = 0; 1573271d7ebSFengnan Chang cc->valid_nr_cpages = 0; 1588bfbfb0dSChao Yu if (!reuse) 1594c8ff709SChao Yu cc->cluster_idx = NULL_CLUSTER; 1604c8ff709SChao Yu } 1614c8ff709SChao Yu 1624c8ff709SChao Yu void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page) 1634c8ff709SChao Yu { 1644c8ff709SChao Yu unsigned int cluster_ofs; 1654c8ff709SChao Yu 1664c8ff709SChao Yu if (!f2fs_cluster_can_merge_page(cc, page->index)) 1674c8ff709SChao Yu f2fs_bug_on(F2FS_I_SB(cc->inode), 1); 1684c8ff709SChao Yu 1694c8ff709SChao Yu cluster_ofs = offset_in_cluster(cc, page->index); 1704c8ff709SChao Yu cc->rpages[cluster_ofs] = page; 1714c8ff709SChao Yu cc->nr_rpages++; 1724c8ff709SChao Yu cc->cluster_idx = cluster_idx(cc, page->index); 1734c8ff709SChao Yu } 1744c8ff709SChao Yu 1754c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZO 1764c8ff709SChao Yu static int lzo_init_compress_ctx(struct compress_ctx *cc) 1774c8ff709SChao Yu { 1784c8ff709SChao Yu cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), 1794c8ff709SChao Yu LZO1X_MEM_COMPRESS, GFP_NOFS); 1804c8ff709SChao Yu if (!cc->private) 1814c8ff709SChao Yu return -ENOMEM; 1824c8ff709SChao Yu 1834c8ff709SChao Yu cc->clen = lzo1x_worst_compress(PAGE_SIZE << cc->log_cluster_size); 1844c8ff709SChao Yu return 0; 1854c8ff709SChao Yu } 1864c8ff709SChao Yu 1874c8ff709SChao Yu static void lzo_destroy_compress_ctx(struct compress_ctx *cc) 1884c8ff709SChao Yu { 1894c8ff709SChao Yu kvfree(cc->private); 1904c8ff709SChao Yu cc->private = NULL; 1914c8ff709SChao Yu } 1924c8ff709SChao Yu 1934c8ff709SChao Yu static int lzo_compress_pages(struct compress_ctx *cc) 1944c8ff709SChao Yu { 1954c8ff709SChao Yu int ret; 1964c8ff709SChao Yu 1974c8ff709SChao Yu ret = lzo1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, 1984c8ff709SChao Yu &cc->clen, cc->private); 1994c8ff709SChao Yu if (ret != LZO_E_OK) { 2004c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lzo compress failed, ret:%d\n", 2014c8ff709SChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); 2024c8ff709SChao Yu return -EIO; 2034c8ff709SChao Yu } 2044c8ff709SChao Yu return 0; 2054c8ff709SChao Yu } 2064c8ff709SChao Yu 2074c8ff709SChao Yu static int lzo_decompress_pages(struct decompress_io_ctx *dic) 2084c8ff709SChao Yu { 2094c8ff709SChao Yu int ret; 2104c8ff709SChao Yu 2114c8ff709SChao Yu ret = lzo1x_decompress_safe(dic->cbuf->cdata, dic->clen, 2124c8ff709SChao Yu dic->rbuf, &dic->rlen); 2134c8ff709SChao Yu if (ret != LZO_E_OK) { 2144c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lzo decompress failed, ret:%d\n", 2154c8ff709SChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); 2164c8ff709SChao Yu return -EIO; 2174c8ff709SChao Yu } 2184c8ff709SChao Yu 2194c8ff709SChao Yu if (dic->rlen != PAGE_SIZE << dic->log_cluster_size) { 2204c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lzo invalid rlen:%zu, " 2214c8ff709SChao Yu "expected:%lu\n", KERN_ERR, 2224c8ff709SChao Yu F2FS_I_SB(dic->inode)->sb->s_id, 2234c8ff709SChao Yu dic->rlen, 2244c8ff709SChao Yu PAGE_SIZE << dic->log_cluster_size); 2254c8ff709SChao Yu return -EIO; 2264c8ff709SChao Yu } 2274c8ff709SChao Yu return 0; 2284c8ff709SChao Yu } 2294c8ff709SChao Yu 2304c8ff709SChao Yu static const struct f2fs_compress_ops f2fs_lzo_ops = { 2314c8ff709SChao Yu .init_compress_ctx = lzo_init_compress_ctx, 2324c8ff709SChao Yu .destroy_compress_ctx = lzo_destroy_compress_ctx, 2334c8ff709SChao Yu .compress_pages = lzo_compress_pages, 2344c8ff709SChao Yu .decompress_pages = lzo_decompress_pages, 2354c8ff709SChao Yu }; 2364c8ff709SChao Yu #endif 2374c8ff709SChao Yu 2384c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZ4 2394c8ff709SChao Yu static int lz4_init_compress_ctx(struct compress_ctx *cc) 2404c8ff709SChao Yu { 2413fde13f8SChao Yu unsigned int size = LZ4_MEM_COMPRESS; 2423fde13f8SChao Yu 2433fde13f8SChao Yu #ifdef CONFIG_F2FS_FS_LZ4HC 244b90e5086SChao Yu if (F2FS_I(cc->inode)->i_compress_level) 2453fde13f8SChao Yu size = LZ4HC_MEM_COMPRESS; 2463fde13f8SChao Yu #endif 2473fde13f8SChao Yu 2483fde13f8SChao Yu cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), size, GFP_NOFS); 2494c8ff709SChao Yu if (!cc->private) 2504c8ff709SChao Yu return -ENOMEM; 2514c8ff709SChao Yu 252f6644143SChao Yu /* 253f6644143SChao Yu * we do not change cc->clen to LZ4_compressBound(inputsize) to 254f6644143SChao Yu * adapt worst compress case, because lz4 compressor can handle 255f6644143SChao Yu * output budget properly. 256f6644143SChao Yu */ 257f6644143SChao Yu cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; 2584c8ff709SChao Yu return 0; 2594c8ff709SChao Yu } 2604c8ff709SChao Yu 2614c8ff709SChao Yu static void lz4_destroy_compress_ctx(struct compress_ctx *cc) 2624c8ff709SChao Yu { 2634c8ff709SChao Yu kvfree(cc->private); 2644c8ff709SChao Yu cc->private = NULL; 2654c8ff709SChao Yu } 2664c8ff709SChao Yu 2673fde13f8SChao Yu #ifdef CONFIG_F2FS_FS_LZ4HC 2683fde13f8SChao Yu static int lz4hc_compress_pages(struct compress_ctx *cc) 2693fde13f8SChao Yu { 270b90e5086SChao Yu unsigned char level = F2FS_I(cc->inode)->i_compress_level; 2713fde13f8SChao Yu int len; 2723fde13f8SChao Yu 2733fde13f8SChao Yu if (level) 2743fde13f8SChao Yu len = LZ4_compress_HC(cc->rbuf, cc->cbuf->cdata, cc->rlen, 2753fde13f8SChao Yu cc->clen, level, cc->private); 2763fde13f8SChao Yu else 2773fde13f8SChao Yu len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, 2783fde13f8SChao Yu cc->clen, cc->private); 2793fde13f8SChao Yu if (!len) 2803fde13f8SChao Yu return -EAGAIN; 2813fde13f8SChao Yu 2823fde13f8SChao Yu cc->clen = len; 2833fde13f8SChao Yu return 0; 2843fde13f8SChao Yu } 2853fde13f8SChao Yu #endif 2863fde13f8SChao Yu 2874c8ff709SChao Yu static int lz4_compress_pages(struct compress_ctx *cc) 2884c8ff709SChao Yu { 2894c8ff709SChao Yu int len; 2904c8ff709SChao Yu 2913fde13f8SChao Yu #ifdef CONFIG_F2FS_FS_LZ4HC 2923fde13f8SChao Yu return lz4hc_compress_pages(cc); 2933fde13f8SChao Yu #endif 2944c8ff709SChao Yu len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, 2954c8ff709SChao Yu cc->clen, cc->private); 296f6644143SChao Yu if (!len) 297f6644143SChao Yu return -EAGAIN; 298f6644143SChao Yu 2994c8ff709SChao Yu cc->clen = len; 3004c8ff709SChao Yu return 0; 3014c8ff709SChao Yu } 3024c8ff709SChao Yu 3034c8ff709SChao Yu static int lz4_decompress_pages(struct decompress_io_ctx *dic) 3044c8ff709SChao Yu { 3054c8ff709SChao Yu int ret; 3064c8ff709SChao Yu 3074c8ff709SChao Yu ret = LZ4_decompress_safe(dic->cbuf->cdata, dic->rbuf, 3084c8ff709SChao Yu dic->clen, dic->rlen); 3094c8ff709SChao Yu if (ret < 0) { 3104c8ff709SChao Yu printk_ratelimited("%sF2FS-fs (%s): lz4 decompress failed, ret:%d\n", 3114c8ff709SChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); 3124c8ff709SChao Yu return -EIO; 3134c8ff709SChao Yu } 3144c8ff709SChao Yu 3154c8ff709SChao Yu if (ret != PAGE_SIZE << dic->log_cluster_size) { 316d284af43SChao Yu printk_ratelimited("%sF2FS-fs (%s): lz4 invalid ret:%d, " 3174c8ff709SChao Yu "expected:%lu\n", KERN_ERR, 318d284af43SChao Yu F2FS_I_SB(dic->inode)->sb->s_id, ret, 3194c8ff709SChao Yu PAGE_SIZE << dic->log_cluster_size); 3204c8ff709SChao Yu return -EIO; 3214c8ff709SChao Yu } 3224c8ff709SChao Yu return 0; 3234c8ff709SChao Yu } 3244c8ff709SChao Yu 3254c8ff709SChao Yu static const struct f2fs_compress_ops f2fs_lz4_ops = { 3264c8ff709SChao Yu .init_compress_ctx = lz4_init_compress_ctx, 3274c8ff709SChao Yu .destroy_compress_ctx = lz4_destroy_compress_ctx, 3284c8ff709SChao Yu .compress_pages = lz4_compress_pages, 3294c8ff709SChao Yu .decompress_pages = lz4_decompress_pages, 3304c8ff709SChao Yu }; 3314c8ff709SChao Yu #endif 3324c8ff709SChao Yu 33350cfa66fSChao Yu #ifdef CONFIG_F2FS_FS_ZSTD 33450cfa66fSChao Yu #define F2FS_ZSTD_DEFAULT_CLEVEL 1 33550cfa66fSChao Yu 33650cfa66fSChao Yu static int zstd_init_compress_ctx(struct compress_ctx *cc) 33750cfa66fSChao Yu { 338cf30f6a5SNick Terrell zstd_parameters params; 339cf30f6a5SNick Terrell zstd_cstream *stream; 34050cfa66fSChao Yu void *workspace; 34150cfa66fSChao Yu unsigned int workspace_size; 342b90e5086SChao Yu unsigned char level = F2FS_I(cc->inode)->i_compress_level; 34350cfa66fSChao Yu 3443fde13f8SChao Yu if (!level) 3453fde13f8SChao Yu level = F2FS_ZSTD_DEFAULT_CLEVEL; 3463fde13f8SChao Yu 3474ff23a65SSheng Yong params = zstd_get_params(level, cc->rlen); 348cf30f6a5SNick Terrell workspace_size = zstd_cstream_workspace_bound(¶ms.cParams); 34950cfa66fSChao Yu 35050cfa66fSChao Yu workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode), 35150cfa66fSChao Yu workspace_size, GFP_NOFS); 35250cfa66fSChao Yu if (!workspace) 35350cfa66fSChao Yu return -ENOMEM; 35450cfa66fSChao Yu 355cf30f6a5SNick Terrell stream = zstd_init_cstream(¶ms, 0, workspace, workspace_size); 35650cfa66fSChao Yu if (!stream) { 357cf30f6a5SNick Terrell printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_cstream failed\n", 35850cfa66fSChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, 35950cfa66fSChao Yu __func__); 36050cfa66fSChao Yu kvfree(workspace); 36150cfa66fSChao Yu return -EIO; 36250cfa66fSChao Yu } 36350cfa66fSChao Yu 36450cfa66fSChao Yu cc->private = workspace; 36550cfa66fSChao Yu cc->private2 = stream; 36650cfa66fSChao Yu 36750cfa66fSChao Yu cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; 36850cfa66fSChao Yu return 0; 36950cfa66fSChao Yu } 37050cfa66fSChao Yu 37150cfa66fSChao Yu static void zstd_destroy_compress_ctx(struct compress_ctx *cc) 37250cfa66fSChao Yu { 37350cfa66fSChao Yu kvfree(cc->private); 37450cfa66fSChao Yu cc->private = NULL; 37550cfa66fSChao Yu cc->private2 = NULL; 37650cfa66fSChao Yu } 37750cfa66fSChao Yu 37850cfa66fSChao Yu static int zstd_compress_pages(struct compress_ctx *cc) 37950cfa66fSChao Yu { 380cf30f6a5SNick Terrell zstd_cstream *stream = cc->private2; 381cf30f6a5SNick Terrell zstd_in_buffer inbuf; 382cf30f6a5SNick Terrell zstd_out_buffer outbuf; 38350cfa66fSChao Yu int src_size = cc->rlen; 38450cfa66fSChao Yu int dst_size = src_size - PAGE_SIZE - COMPRESS_HEADER_SIZE; 38550cfa66fSChao Yu int ret; 38650cfa66fSChao Yu 38750cfa66fSChao Yu inbuf.pos = 0; 38850cfa66fSChao Yu inbuf.src = cc->rbuf; 38950cfa66fSChao Yu inbuf.size = src_size; 39050cfa66fSChao Yu 39150cfa66fSChao Yu outbuf.pos = 0; 39250cfa66fSChao Yu outbuf.dst = cc->cbuf->cdata; 39350cfa66fSChao Yu outbuf.size = dst_size; 39450cfa66fSChao Yu 395cf30f6a5SNick Terrell ret = zstd_compress_stream(stream, &outbuf, &inbuf); 396cf30f6a5SNick Terrell if (zstd_is_error(ret)) { 397cf30f6a5SNick Terrell printk_ratelimited("%sF2FS-fs (%s): %s zstd_compress_stream failed, ret: %d\n", 39850cfa66fSChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, 399cf30f6a5SNick Terrell __func__, zstd_get_error_code(ret)); 40050cfa66fSChao Yu return -EIO; 40150cfa66fSChao Yu } 40250cfa66fSChao Yu 403cf30f6a5SNick Terrell ret = zstd_end_stream(stream, &outbuf); 404cf30f6a5SNick Terrell if (zstd_is_error(ret)) { 405cf30f6a5SNick Terrell printk_ratelimited("%sF2FS-fs (%s): %s zstd_end_stream returned %d\n", 40650cfa66fSChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, 407cf30f6a5SNick Terrell __func__, zstd_get_error_code(ret)); 40850cfa66fSChao Yu return -EIO; 40950cfa66fSChao Yu } 41050cfa66fSChao Yu 4111454c978SChao Yu /* 4121454c978SChao Yu * there is compressed data remained in intermediate buffer due to 4131454c978SChao Yu * no more space in cbuf.cdata 4141454c978SChao Yu */ 4151454c978SChao Yu if (ret) 4161454c978SChao Yu return -EAGAIN; 4171454c978SChao Yu 41850cfa66fSChao Yu cc->clen = outbuf.pos; 41950cfa66fSChao Yu return 0; 42050cfa66fSChao Yu } 42150cfa66fSChao Yu 42250cfa66fSChao Yu static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic) 42350cfa66fSChao Yu { 424cf30f6a5SNick Terrell zstd_dstream *stream; 42550cfa66fSChao Yu void *workspace; 42650cfa66fSChao Yu unsigned int workspace_size; 4270e2b7385SChao Yu unsigned int max_window_size = 4280e2b7385SChao Yu MAX_COMPRESS_WINDOW_SIZE(dic->log_cluster_size); 42950cfa66fSChao Yu 430cf30f6a5SNick Terrell workspace_size = zstd_dstream_workspace_bound(max_window_size); 43150cfa66fSChao Yu 43250cfa66fSChao Yu workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode), 43350cfa66fSChao Yu workspace_size, GFP_NOFS); 43450cfa66fSChao Yu if (!workspace) 43550cfa66fSChao Yu return -ENOMEM; 43650cfa66fSChao Yu 437cf30f6a5SNick Terrell stream = zstd_init_dstream(max_window_size, workspace, workspace_size); 43850cfa66fSChao Yu if (!stream) { 439cf30f6a5SNick Terrell printk_ratelimited("%sF2FS-fs (%s): %s zstd_init_dstream failed\n", 44050cfa66fSChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, 44150cfa66fSChao Yu __func__); 44250cfa66fSChao Yu kvfree(workspace); 44350cfa66fSChao Yu return -EIO; 44450cfa66fSChao Yu } 44550cfa66fSChao Yu 44650cfa66fSChao Yu dic->private = workspace; 44750cfa66fSChao Yu dic->private2 = stream; 44850cfa66fSChao Yu 44950cfa66fSChao Yu return 0; 45050cfa66fSChao Yu } 45150cfa66fSChao Yu 45250cfa66fSChao Yu static void zstd_destroy_decompress_ctx(struct decompress_io_ctx *dic) 45350cfa66fSChao Yu { 45450cfa66fSChao Yu kvfree(dic->private); 45550cfa66fSChao Yu dic->private = NULL; 45650cfa66fSChao Yu dic->private2 = NULL; 45750cfa66fSChao Yu } 45850cfa66fSChao Yu 45950cfa66fSChao Yu static int zstd_decompress_pages(struct decompress_io_ctx *dic) 46050cfa66fSChao Yu { 461cf30f6a5SNick Terrell zstd_dstream *stream = dic->private2; 462cf30f6a5SNick Terrell zstd_in_buffer inbuf; 463cf30f6a5SNick Terrell zstd_out_buffer outbuf; 46450cfa66fSChao Yu int ret; 46550cfa66fSChao Yu 46650cfa66fSChao Yu inbuf.pos = 0; 46750cfa66fSChao Yu inbuf.src = dic->cbuf->cdata; 46850cfa66fSChao Yu inbuf.size = dic->clen; 46950cfa66fSChao Yu 47050cfa66fSChao Yu outbuf.pos = 0; 47150cfa66fSChao Yu outbuf.dst = dic->rbuf; 47250cfa66fSChao Yu outbuf.size = dic->rlen; 47350cfa66fSChao Yu 474cf30f6a5SNick Terrell ret = zstd_decompress_stream(stream, &outbuf, &inbuf); 475cf30f6a5SNick Terrell if (zstd_is_error(ret)) { 476cf30f6a5SNick Terrell printk_ratelimited("%sF2FS-fs (%s): %s zstd_decompress_stream failed, ret: %d\n", 47750cfa66fSChao Yu KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, 478cf30f6a5SNick Terrell __func__, zstd_get_error_code(ret)); 47950cfa66fSChao Yu return -EIO; 48050cfa66fSChao Yu } 48150cfa66fSChao Yu 48250cfa66fSChao Yu if (dic->rlen != outbuf.pos) { 48350cfa66fSChao Yu printk_ratelimited("%sF2FS-fs (%s): %s ZSTD invalid rlen:%zu, " 48450cfa66fSChao Yu "expected:%lu\n", KERN_ERR, 48550cfa66fSChao Yu F2FS_I_SB(dic->inode)->sb->s_id, 48650cfa66fSChao Yu __func__, dic->rlen, 48750cfa66fSChao Yu PAGE_SIZE << dic->log_cluster_size); 48850cfa66fSChao Yu return -EIO; 48950cfa66fSChao Yu } 49050cfa66fSChao Yu 49150cfa66fSChao Yu return 0; 49250cfa66fSChao Yu } 49350cfa66fSChao Yu 49450cfa66fSChao Yu static const struct f2fs_compress_ops f2fs_zstd_ops = { 49550cfa66fSChao Yu .init_compress_ctx = zstd_init_compress_ctx, 49650cfa66fSChao Yu .destroy_compress_ctx = zstd_destroy_compress_ctx, 49750cfa66fSChao Yu .compress_pages = zstd_compress_pages, 49850cfa66fSChao Yu .init_decompress_ctx = zstd_init_decompress_ctx, 49950cfa66fSChao Yu .destroy_decompress_ctx = zstd_destroy_decompress_ctx, 50050cfa66fSChao Yu .decompress_pages = zstd_decompress_pages, 50150cfa66fSChao Yu }; 50250cfa66fSChao Yu #endif 50350cfa66fSChao Yu 5046d92b201SChao Yu #ifdef CONFIG_F2FS_FS_LZO 5056d92b201SChao Yu #ifdef CONFIG_F2FS_FS_LZORLE 5066d92b201SChao Yu static int lzorle_compress_pages(struct compress_ctx *cc) 5076d92b201SChao Yu { 5086d92b201SChao Yu int ret; 5096d92b201SChao Yu 5106d92b201SChao Yu ret = lzorle1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, 5116d92b201SChao Yu &cc->clen, cc->private); 5126d92b201SChao Yu if (ret != LZO_E_OK) { 5136d92b201SChao Yu printk_ratelimited("%sF2FS-fs (%s): lzo-rle compress failed, ret:%d\n", 5146d92b201SChao Yu KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); 5156d92b201SChao Yu return -EIO; 5166d92b201SChao Yu } 5176d92b201SChao Yu return 0; 5186d92b201SChao Yu } 5196d92b201SChao Yu 5206d92b201SChao Yu static const struct f2fs_compress_ops f2fs_lzorle_ops = { 5216d92b201SChao Yu .init_compress_ctx = lzo_init_compress_ctx, 5226d92b201SChao Yu .destroy_compress_ctx = lzo_destroy_compress_ctx, 5236d92b201SChao Yu .compress_pages = lzorle_compress_pages, 5246d92b201SChao Yu .decompress_pages = lzo_decompress_pages, 5256d92b201SChao Yu }; 5266d92b201SChao Yu #endif 5276d92b201SChao Yu #endif 5286d92b201SChao Yu 5294c8ff709SChao Yu static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = { 5304c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZO 5314c8ff709SChao Yu &f2fs_lzo_ops, 5324c8ff709SChao Yu #else 5334c8ff709SChao Yu NULL, 5344c8ff709SChao Yu #endif 5354c8ff709SChao Yu #ifdef CONFIG_F2FS_FS_LZ4 5364c8ff709SChao Yu &f2fs_lz4_ops, 5374c8ff709SChao Yu #else 5384c8ff709SChao Yu NULL, 5394c8ff709SChao Yu #endif 54050cfa66fSChao Yu #ifdef CONFIG_F2FS_FS_ZSTD 54150cfa66fSChao Yu &f2fs_zstd_ops, 54250cfa66fSChao Yu #else 54350cfa66fSChao Yu NULL, 54450cfa66fSChao Yu #endif 5456d92b201SChao Yu #if defined(CONFIG_F2FS_FS_LZO) && defined(CONFIG_F2FS_FS_LZORLE) 5466d92b201SChao Yu &f2fs_lzorle_ops, 5476d92b201SChao Yu #else 5486d92b201SChao Yu NULL, 5496d92b201SChao Yu #endif 5504c8ff709SChao Yu }; 5514c8ff709SChao Yu 5524c8ff709SChao Yu bool f2fs_is_compress_backend_ready(struct inode *inode) 5534c8ff709SChao Yu { 5544c8ff709SChao Yu if (!f2fs_compressed_file(inode)) 5554c8ff709SChao Yu return true; 5564c8ff709SChao Yu return f2fs_cops[F2FS_I(inode)->i_compress_algorithm]; 5574c8ff709SChao Yu } 5584c8ff709SChao Yu 55999bbe307SJaegeuk Kim static mempool_t *compress_page_pool; 5605e6bbde9SChao Yu static int num_compress_pages = 512; 5615e6bbde9SChao Yu module_param(num_compress_pages, uint, 0444); 5625e6bbde9SChao Yu MODULE_PARM_DESC(num_compress_pages, 5635e6bbde9SChao Yu "Number of intermediate compress pages to preallocate"); 5645e6bbde9SChao Yu 565a1357a91SYangtao Li int __init f2fs_init_compress_mempool(void) 5665e6bbde9SChao Yu { 5675e6bbde9SChao Yu compress_page_pool = mempool_create_page_pool(num_compress_pages, 0); 568870af777SYangtao Li return compress_page_pool ? 0 : -ENOMEM; 5695e6bbde9SChao Yu } 5705e6bbde9SChao Yu 5715e6bbde9SChao Yu void f2fs_destroy_compress_mempool(void) 5725e6bbde9SChao Yu { 5735e6bbde9SChao Yu mempool_destroy(compress_page_pool); 5745e6bbde9SChao Yu } 5755e6bbde9SChao Yu 5765e6bbde9SChao Yu static struct page *f2fs_compress_alloc_page(void) 5774c8ff709SChao Yu { 5784c8ff709SChao Yu struct page *page; 5794c8ff709SChao Yu 5805e6bbde9SChao Yu page = mempool_alloc(compress_page_pool, GFP_NOFS); 5814c8ff709SChao Yu lock_page(page); 5825e6bbde9SChao Yu 5834c8ff709SChao Yu return page; 5844c8ff709SChao Yu } 5854c8ff709SChao Yu 5865e6bbde9SChao Yu static void f2fs_compress_free_page(struct page *page) 5875e6bbde9SChao Yu { 5885e6bbde9SChao Yu if (!page) 5895e6bbde9SChao Yu return; 590b763f3beSChao Yu detach_page_private(page); 5915e6bbde9SChao Yu page->mapping = NULL; 5925e6bbde9SChao Yu unlock_page(page); 5935e6bbde9SChao Yu mempool_free(page, compress_page_pool); 5945e6bbde9SChao Yu } 5955e6bbde9SChao Yu 5966fcaebacSDaeho Jeong #define MAX_VMAP_RETRIES 3 5976fcaebacSDaeho Jeong 5986fcaebacSDaeho Jeong static void *f2fs_vmap(struct page **pages, unsigned int count) 5996fcaebacSDaeho Jeong { 6006fcaebacSDaeho Jeong int i; 6016fcaebacSDaeho Jeong void *buf = NULL; 6026fcaebacSDaeho Jeong 6036fcaebacSDaeho Jeong for (i = 0; i < MAX_VMAP_RETRIES; i++) { 6046fcaebacSDaeho Jeong buf = vm_map_ram(pages, count, -1); 6056fcaebacSDaeho Jeong if (buf) 6066fcaebacSDaeho Jeong break; 6076fcaebacSDaeho Jeong vm_unmap_aliases(); 6086fcaebacSDaeho Jeong } 6096fcaebacSDaeho Jeong return buf; 6106fcaebacSDaeho Jeong } 6116fcaebacSDaeho Jeong 6124c8ff709SChao Yu static int f2fs_compress_pages(struct compress_ctx *cc) 6134c8ff709SChao Yu { 6144c8ff709SChao Yu struct f2fs_inode_info *fi = F2FS_I(cc->inode); 6154c8ff709SChao Yu const struct f2fs_compress_ops *cops = 6164c8ff709SChao Yu f2fs_cops[fi->i_compress_algorithm]; 61731083031SChao Yu unsigned int max_len, new_nr_cpages; 618b28f047bSChao Yu u32 chksum = 0; 6194c8ff709SChao Yu int i, ret; 6204c8ff709SChao Yu 6214c8ff709SChao Yu trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx, 6224c8ff709SChao Yu cc->cluster_size, fi->i_compress_algorithm); 6234c8ff709SChao Yu 62423b1faaaSChao Yu if (cops->init_compress_ctx) { 6254c8ff709SChao Yu ret = cops->init_compress_ctx(cc); 6264c8ff709SChao Yu if (ret) 6274c8ff709SChao Yu goto out; 62823b1faaaSChao Yu } 6294c8ff709SChao Yu 6304c8ff709SChao Yu max_len = COMPRESS_HEADER_SIZE + cc->clen; 6314c8ff709SChao Yu cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE); 6323271d7ebSFengnan Chang cc->valid_nr_cpages = cc->nr_cpages; 6334c8ff709SChao Yu 63431083031SChao Yu cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages); 6354c8ff709SChao Yu if (!cc->cpages) { 6364c8ff709SChao Yu ret = -ENOMEM; 6374c8ff709SChao Yu goto destroy_compress_ctx; 6384c8ff709SChao Yu } 6394c8ff709SChao Yu 6404c8ff709SChao Yu for (i = 0; i < cc->nr_cpages; i++) { 6415e6bbde9SChao Yu cc->cpages[i] = f2fs_compress_alloc_page(); 6424c8ff709SChao Yu if (!cc->cpages[i]) { 6434c8ff709SChao Yu ret = -ENOMEM; 6444c8ff709SChao Yu goto out_free_cpages; 6454c8ff709SChao Yu } 6464c8ff709SChao Yu } 6474c8ff709SChao Yu 6486fcaebacSDaeho Jeong cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size); 6494c8ff709SChao Yu if (!cc->rbuf) { 6504c8ff709SChao Yu ret = -ENOMEM; 6514c8ff709SChao Yu goto out_free_cpages; 6524c8ff709SChao Yu } 6534c8ff709SChao Yu 6546fcaebacSDaeho Jeong cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages); 6554c8ff709SChao Yu if (!cc->cbuf) { 6564c8ff709SChao Yu ret = -ENOMEM; 6574c8ff709SChao Yu goto out_vunmap_rbuf; 6584c8ff709SChao Yu } 6594c8ff709SChao Yu 6604c8ff709SChao Yu ret = cops->compress_pages(cc); 6614c8ff709SChao Yu if (ret) 6624c8ff709SChao Yu goto out_vunmap_cbuf; 6634c8ff709SChao Yu 6644c8ff709SChao Yu max_len = PAGE_SIZE * (cc->cluster_size - 1) - COMPRESS_HEADER_SIZE; 6654c8ff709SChao Yu 6664c8ff709SChao Yu if (cc->clen > max_len) { 6674c8ff709SChao Yu ret = -EAGAIN; 6684c8ff709SChao Yu goto out_vunmap_cbuf; 6694c8ff709SChao Yu } 6704c8ff709SChao Yu 6714c8ff709SChao Yu cc->cbuf->clen = cpu_to_le32(cc->clen); 6724c8ff709SChao Yu 673447286ebSYangtao Li if (fi->i_compress_flag & BIT(COMPRESS_CHKSUM)) 674b28f047bSChao Yu chksum = f2fs_crc32(F2FS_I_SB(cc->inode), 675b28f047bSChao Yu cc->cbuf->cdata, cc->clen); 676b28f047bSChao Yu cc->cbuf->chksum = cpu_to_le32(chksum); 677b28f047bSChao Yu 6784c8ff709SChao Yu for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++) 6794c8ff709SChao Yu cc->cbuf->reserved[i] = cpu_to_le32(0); 6804c8ff709SChao Yu 68131083031SChao Yu new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE); 68231083031SChao Yu 6837fa6d598SEric Biggers /* zero out any unused part of the last page */ 6847fa6d598SEric Biggers memset(&cc->cbuf->cdata[cc->clen], 0, 68531083031SChao Yu (new_nr_cpages * PAGE_SIZE) - 68631083031SChao Yu (cc->clen + COMPRESS_HEADER_SIZE)); 6877fa6d598SEric Biggers 6886fcaebacSDaeho Jeong vm_unmap_ram(cc->cbuf, cc->nr_cpages); 6896fcaebacSDaeho Jeong vm_unmap_ram(cc->rbuf, cc->cluster_size); 6904c8ff709SChao Yu 691ebaaec35SZhang Qilong for (i = new_nr_cpages; i < cc->nr_cpages; i++) { 6925e6bbde9SChao Yu f2fs_compress_free_page(cc->cpages[i]); 6934c8ff709SChao Yu cc->cpages[i] = NULL; 6944c8ff709SChao Yu } 6954c8ff709SChao Yu 69623b1faaaSChao Yu if (cops->destroy_compress_ctx) 69709ff4801SChao Yu cops->destroy_compress_ctx(cc); 69809ff4801SChao Yu 6993271d7ebSFengnan Chang cc->valid_nr_cpages = new_nr_cpages; 7004c8ff709SChao Yu 7014c8ff709SChao Yu trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, 7024c8ff709SChao Yu cc->clen, ret); 7034c8ff709SChao Yu return 0; 7044c8ff709SChao Yu 7054c8ff709SChao Yu out_vunmap_cbuf: 7066fcaebacSDaeho Jeong vm_unmap_ram(cc->cbuf, cc->nr_cpages); 7074c8ff709SChao Yu out_vunmap_rbuf: 7086fcaebacSDaeho Jeong vm_unmap_ram(cc->rbuf, cc->cluster_size); 7094c8ff709SChao Yu out_free_cpages: 7104c8ff709SChao Yu for (i = 0; i < cc->nr_cpages; i++) { 7114c8ff709SChao Yu if (cc->cpages[i]) 7125e6bbde9SChao Yu f2fs_compress_free_page(cc->cpages[i]); 7134c8ff709SChao Yu } 71431083031SChao Yu page_array_free(cc->inode, cc->cpages, cc->nr_cpages); 7154c8ff709SChao Yu cc->cpages = NULL; 7164c8ff709SChao Yu destroy_compress_ctx: 71723b1faaaSChao Yu if (cops->destroy_compress_ctx) 7184c8ff709SChao Yu cops->destroy_compress_ctx(cc); 7194c8ff709SChao Yu out: 7204c8ff709SChao Yu trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, 7214c8ff709SChao Yu cc->clen, ret); 7224c8ff709SChao Yu return ret; 7234c8ff709SChao Yu } 7244c8ff709SChao Yu 725bff139b4SDaeho Jeong static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic, 726bff139b4SDaeho Jeong bool pre_alloc); 727bff139b4SDaeho Jeong static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, 728bff139b4SDaeho Jeong bool bypass_destroy_callback, bool pre_alloc); 729bff139b4SDaeho Jeong 730bff139b4SDaeho Jeong void f2fs_decompress_cluster(struct decompress_io_ctx *dic, bool in_task) 7314c8ff709SChao Yu { 7324c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); 7334c8ff709SChao Yu struct f2fs_inode_info *fi = F2FS_I(dic->inode); 7344c8ff709SChao Yu const struct f2fs_compress_ops *cops = 7354c8ff709SChao Yu f2fs_cops[fi->i_compress_algorithm]; 736bff139b4SDaeho Jeong bool bypass_callback = false; 7374c8ff709SChao Yu int ret; 7384c8ff709SChao Yu 7394c8ff709SChao Yu trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx, 7404c8ff709SChao Yu dic->cluster_size, fi->i_compress_algorithm); 7414c8ff709SChao Yu 7424c8ff709SChao Yu if (dic->failed) { 7434c8ff709SChao Yu ret = -EIO; 7447f59b277SEric Biggers goto out_end_io; 7454c8ff709SChao Yu } 7464c8ff709SChao Yu 747bff139b4SDaeho Jeong ret = f2fs_prepare_decomp_mem(dic, false); 748bff139b4SDaeho Jeong if (ret) { 749bff139b4SDaeho Jeong bypass_callback = true; 750bff139b4SDaeho Jeong goto out_release; 7514c8ff709SChao Yu } 7524c8ff709SChao Yu 7534c8ff709SChao Yu dic->clen = le32_to_cpu(dic->cbuf->clen); 7544c8ff709SChao Yu dic->rlen = PAGE_SIZE << dic->log_cluster_size; 7554c8ff709SChao Yu 7564c8ff709SChao Yu if (dic->clen > PAGE_SIZE * dic->nr_cpages - COMPRESS_HEADER_SIZE) { 7574c8ff709SChao Yu ret = -EFSCORRUPTED; 758*1aa161e4SJaegeuk Kim 759*1aa161e4SJaegeuk Kim /* Avoid f2fs_commit_super in irq context */ 760*1aa161e4SJaegeuk Kim if (in_task) 761*1aa161e4SJaegeuk Kim f2fs_save_errors(sbi, ERROR_FAIL_DECOMPRESSION); 762*1aa161e4SJaegeuk Kim else 76395fa90c9SChao Yu f2fs_handle_error(sbi, ERROR_FAIL_DECOMPRESSION); 764bff139b4SDaeho Jeong goto out_release; 7654c8ff709SChao Yu } 7664c8ff709SChao Yu 7674c8ff709SChao Yu ret = cops->decompress_pages(dic); 7684c8ff709SChao Yu 769447286ebSYangtao Li if (!ret && (fi->i_compress_flag & BIT(COMPRESS_CHKSUM))) { 770b28f047bSChao Yu u32 provided = le32_to_cpu(dic->cbuf->chksum); 771b28f047bSChao Yu u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen); 772b28f047bSChao Yu 773b28f047bSChao Yu if (provided != calculated) { 774b28f047bSChao Yu if (!is_inode_flag_set(dic->inode, FI_COMPRESS_CORRUPT)) { 775b28f047bSChao Yu set_inode_flag(dic->inode, FI_COMPRESS_CORRUPT); 776b28f047bSChao Yu printk_ratelimited( 777b28f047bSChao Yu "%sF2FS-fs (%s): checksum invalid, nid = %lu, %x vs %x", 778b28f047bSChao Yu KERN_INFO, sbi->sb->s_id, dic->inode->i_ino, 779b28f047bSChao Yu provided, calculated); 780b28f047bSChao Yu } 781b28f047bSChao Yu set_sbi_flag(sbi, SBI_NEED_FSCK); 782b28f047bSChao Yu } 783b28f047bSChao Yu } 784b28f047bSChao Yu 785bff139b4SDaeho Jeong out_release: 786bff139b4SDaeho Jeong f2fs_release_decomp_mem(dic, bypass_callback, false); 787bff139b4SDaeho Jeong 7887f59b277SEric Biggers out_end_io: 7894c8ff709SChao Yu trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx, 7904c8ff709SChao Yu dic->clen, ret); 791bff139b4SDaeho Jeong f2fs_decompress_end_io(dic, ret, in_task); 7927f59b277SEric Biggers } 7937f59b277SEric Biggers 7947f59b277SEric Biggers /* 7957f59b277SEric Biggers * This is called when a page of a compressed cluster has been read from disk 7967f59b277SEric Biggers * (or failed to be read from disk). It checks whether this page was the last 7977f59b277SEric Biggers * page being waited on in the cluster, and if so, it decompresses the cluster 7987f59b277SEric Biggers * (or in the case of a failure, cleans up without actually decompressing). 7997f59b277SEric Biggers */ 8006ce19affSChao Yu void f2fs_end_read_compressed_page(struct page *page, bool failed, 801bff139b4SDaeho Jeong block_t blkaddr, bool in_task) 8027f59b277SEric Biggers { 8037f59b277SEric Biggers struct decompress_io_ctx *dic = 8047f59b277SEric Biggers (struct decompress_io_ctx *)page_private(page); 8057f59b277SEric Biggers struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); 8067f59b277SEric Biggers 8077f59b277SEric Biggers dec_page_count(sbi, F2FS_RD_DATA); 8087f59b277SEric Biggers 8097f59b277SEric Biggers if (failed) 8107f59b277SEric Biggers WRITE_ONCE(dic->failed, true); 811bff139b4SDaeho Jeong else if (blkaddr && in_task) 8126ce19affSChao Yu f2fs_cache_compressed_page(sbi, page, 8136ce19affSChao Yu dic->inode->i_ino, blkaddr); 8147f59b277SEric Biggers 8157f59b277SEric Biggers if (atomic_dec_and_test(&dic->remaining_pages)) 816bff139b4SDaeho Jeong f2fs_decompress_cluster(dic, in_task); 8174c8ff709SChao Yu } 8184c8ff709SChao Yu 8194c8ff709SChao Yu static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) 8204c8ff709SChao Yu { 8214c8ff709SChao Yu if (cc->cluster_idx == NULL_CLUSTER) 8224c8ff709SChao Yu return true; 8234c8ff709SChao Yu return cc->cluster_idx == cluster_idx(cc, index); 8244c8ff709SChao Yu } 8254c8ff709SChao Yu 8264c8ff709SChao Yu bool f2fs_cluster_is_empty(struct compress_ctx *cc) 8274c8ff709SChao Yu { 8284c8ff709SChao Yu return cc->nr_rpages == 0; 8294c8ff709SChao Yu } 8304c8ff709SChao Yu 8314c8ff709SChao Yu static bool f2fs_cluster_is_full(struct compress_ctx *cc) 8324c8ff709SChao Yu { 8334c8ff709SChao Yu return cc->cluster_size == cc->nr_rpages; 8344c8ff709SChao Yu } 8354c8ff709SChao Yu 8364c8ff709SChao Yu bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index) 8374c8ff709SChao Yu { 8384c8ff709SChao Yu if (f2fs_cluster_is_empty(cc)) 8394c8ff709SChao Yu return true; 8404c8ff709SChao Yu return is_page_in_cluster(cc, index); 8414c8ff709SChao Yu } 8424c8ff709SChao Yu 84301fc4b9aSFengnan Chang bool f2fs_all_cluster_page_ready(struct compress_ctx *cc, struct page **pages, 8444f8219f8SFengnan Chang int index, int nr_pages, bool uptodate) 845b368cc5eSFengnan Chang { 84601fc4b9aSFengnan Chang unsigned long pgidx = pages[index]->index; 8474f8219f8SFengnan Chang int i = uptodate ? 0 : 1; 8484f8219f8SFengnan Chang 8494f8219f8SFengnan Chang /* 8504f8219f8SFengnan Chang * when uptodate set to true, try to check all pages in cluster is 8514f8219f8SFengnan Chang * uptodate or not. 8524f8219f8SFengnan Chang */ 8534f8219f8SFengnan Chang if (uptodate && (pgidx % cc->cluster_size)) 8544f8219f8SFengnan Chang return false; 855b368cc5eSFengnan Chang 856b368cc5eSFengnan Chang if (nr_pages - index < cc->cluster_size) 857b368cc5eSFengnan Chang return false; 858b368cc5eSFengnan Chang 8594f8219f8SFengnan Chang for (; i < cc->cluster_size; i++) { 86001fc4b9aSFengnan Chang if (pages[index + i]->index != pgidx + i) 861b368cc5eSFengnan Chang return false; 86201fc4b9aSFengnan Chang if (uptodate && !PageUptodate(pages[index + i])) 863b368cc5eSFengnan Chang return false; 864b368cc5eSFengnan Chang } 865b368cc5eSFengnan Chang 866b368cc5eSFengnan Chang return true; 867b368cc5eSFengnan Chang } 868b368cc5eSFengnan Chang 8695db479f0SChao Yu static bool cluster_has_invalid_data(struct compress_ctx *cc) 8704c8ff709SChao Yu { 8714c8ff709SChao Yu loff_t i_size = i_size_read(cc->inode); 8724c8ff709SChao Yu unsigned nr_pages = DIV_ROUND_UP(i_size, PAGE_SIZE); 8734c8ff709SChao Yu int i; 8744c8ff709SChao Yu 8754c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 8764c8ff709SChao Yu struct page *page = cc->rpages[i]; 8774c8ff709SChao Yu 8788af85f71SChao Yu f2fs_bug_on(F2FS_I_SB(cc->inode), !page); 8794c8ff709SChao Yu 8804c8ff709SChao Yu /* beyond EOF */ 8814c8ff709SChao Yu if (page->index >= nr_pages) 8824c8ff709SChao Yu return true; 8834c8ff709SChao Yu } 8845db479f0SChao Yu return false; 8855db479f0SChao Yu } 8864c8ff709SChao Yu 887bbe1da7eSChao Yu bool f2fs_sanity_check_cluster(struct dnode_of_data *dn) 888bbe1da7eSChao Yu { 889bbe1da7eSChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); 890bbe1da7eSChao Yu unsigned int cluster_size = F2FS_I(dn->inode)->i_cluster_size; 891bbe1da7eSChao Yu bool compressed = dn->data_blkaddr == COMPRESS_ADDR; 892bbe1da7eSChao Yu int cluster_end = 0; 893bbe1da7eSChao Yu int i; 894bbe1da7eSChao Yu char *reason = ""; 895bbe1da7eSChao Yu 896bbe1da7eSChao Yu if (!compressed) 897bbe1da7eSChao Yu return false; 898bbe1da7eSChao Yu 899bbe1da7eSChao Yu /* [..., COMPR_ADDR, ...] */ 900bbe1da7eSChao Yu if (dn->ofs_in_node % cluster_size) { 901bbe1da7eSChao Yu reason = "[*|C|*|*]"; 902bbe1da7eSChao Yu goto out; 903bbe1da7eSChao Yu } 904bbe1da7eSChao Yu 905bbe1da7eSChao Yu for (i = 1; i < cluster_size; i++) { 906bbe1da7eSChao Yu block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, 907bbe1da7eSChao Yu dn->ofs_in_node + i); 908bbe1da7eSChao Yu 909bbe1da7eSChao Yu /* [COMPR_ADDR, ..., COMPR_ADDR] */ 910bbe1da7eSChao Yu if (blkaddr == COMPRESS_ADDR) { 911bbe1da7eSChao Yu reason = "[C|*|C|*]"; 912bbe1da7eSChao Yu goto out; 913bbe1da7eSChao Yu } 914bbe1da7eSChao Yu if (!__is_valid_data_blkaddr(blkaddr)) { 915bbe1da7eSChao Yu if (!cluster_end) 916bbe1da7eSChao Yu cluster_end = i; 917bbe1da7eSChao Yu continue; 918bbe1da7eSChao Yu } 919bbe1da7eSChao Yu /* [COMPR_ADDR, NULL_ADDR or NEW_ADDR, valid_blkaddr] */ 920bbe1da7eSChao Yu if (cluster_end) { 921bbe1da7eSChao Yu reason = "[C|N|N|V]"; 922bbe1da7eSChao Yu goto out; 923bbe1da7eSChao Yu } 924bbe1da7eSChao Yu } 925bbe1da7eSChao Yu return false; 926bbe1da7eSChao Yu out: 927bbe1da7eSChao Yu f2fs_warn(sbi, "access invalid cluster, ino:%lu, nid:%u, ofs_in_node:%u, reason:%s", 928bbe1da7eSChao Yu dn->inode->i_ino, dn->nid, dn->ofs_in_node, reason); 929bbe1da7eSChao Yu set_sbi_flag(sbi, SBI_NEED_FSCK); 930bbe1da7eSChao Yu return true; 931bbe1da7eSChao Yu } 932bbe1da7eSChao Yu 93391f0fb69SChao Yu static int __f2fs_cluster_blocks(struct inode *inode, 93491f0fb69SChao Yu unsigned int cluster_idx, bool compr) 9354c8ff709SChao Yu { 9364c8ff709SChao Yu struct dnode_of_data dn; 93791f0fb69SChao Yu unsigned int cluster_size = F2FS_I(inode)->i_cluster_size; 93891f0fb69SChao Yu unsigned int start_idx = cluster_idx << 93991f0fb69SChao Yu F2FS_I(inode)->i_log_cluster_size; 9404c8ff709SChao Yu int ret; 9414c8ff709SChao Yu 94291f0fb69SChao Yu set_new_dnode(&dn, inode, NULL, NULL, 0); 94391f0fb69SChao Yu ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); 9444c8ff709SChao Yu if (ret) { 9454c8ff709SChao Yu if (ret == -ENOENT) 9464c8ff709SChao Yu ret = 0; 9474c8ff709SChao Yu goto fail; 9484c8ff709SChao Yu } 9494c8ff709SChao Yu 950bbe1da7eSChao Yu if (f2fs_sanity_check_cluster(&dn)) { 951bbe1da7eSChao Yu ret = -EFSCORRUPTED; 95295fa90c9SChao Yu f2fs_handle_error(F2FS_I_SB(inode), ERROR_CORRUPTED_CLUSTER); 953bbe1da7eSChao Yu goto fail; 954bbe1da7eSChao Yu } 955bbe1da7eSChao Yu 9564c8ff709SChao Yu if (dn.data_blkaddr == COMPRESS_ADDR) { 9574c8ff709SChao Yu int i; 9584c8ff709SChao Yu 9594c8ff709SChao Yu ret = 1; 96091f0fb69SChao Yu for (i = 1; i < cluster_size; i++) { 9614c8ff709SChao Yu block_t blkaddr; 9624c8ff709SChao Yu 963a2ced1ceSChao Yu blkaddr = data_blkaddr(dn.inode, 9644c8ff709SChao Yu dn.node_page, dn.ofs_in_node + i); 9651a67cbe1SChao Yu if (compr) { 9661a67cbe1SChao Yu if (__is_valid_data_blkaddr(blkaddr)) 9671a67cbe1SChao Yu ret++; 9681a67cbe1SChao Yu } else { 9694c8ff709SChao Yu if (blkaddr != NULL_ADDR) 9704c8ff709SChao Yu ret++; 9714c8ff709SChao Yu } 9724c8ff709SChao Yu } 9738f1d4983SChao Yu 9748f1d4983SChao Yu f2fs_bug_on(F2FS_I_SB(inode), 975c6140415SJaegeuk Kim !compr && ret != cluster_size && 976c6140415SJaegeuk Kim !is_inode_flag_set(inode, FI_COMPRESS_RELEASED)); 9771a67cbe1SChao Yu } 9784c8ff709SChao Yu fail: 9794c8ff709SChao Yu f2fs_put_dnode(&dn); 9804c8ff709SChao Yu return ret; 9814c8ff709SChao Yu } 9824c8ff709SChao Yu 9831a67cbe1SChao Yu /* return # of compressed blocks in compressed cluster */ 9841a67cbe1SChao Yu static int f2fs_compressed_blocks(struct compress_ctx *cc) 9851a67cbe1SChao Yu { 98691f0fb69SChao Yu return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true); 9871a67cbe1SChao Yu } 9881a67cbe1SChao Yu 9891a67cbe1SChao Yu /* return # of valid blocks in compressed cluster */ 9904c8ff709SChao Yu int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index) 9914c8ff709SChao Yu { 99291f0fb69SChao Yu return __f2fs_cluster_blocks(inode, 99391f0fb69SChao Yu index >> F2FS_I(inode)->i_log_cluster_size, 99491f0fb69SChao Yu false); 9954c8ff709SChao Yu } 9964c8ff709SChao Yu 9974c8ff709SChao Yu static bool cluster_may_compress(struct compress_ctx *cc) 9984c8ff709SChao Yu { 999602a16d5SDaeho Jeong if (!f2fs_need_compress_data(cc->inode)) 10004c8ff709SChao Yu return false; 10014c8ff709SChao Yu if (f2fs_is_atomic_file(cc->inode)) 10024c8ff709SChao Yu return false; 10034c8ff709SChao Yu if (!f2fs_cluster_is_full(cc)) 10044c8ff709SChao Yu return false; 1005dc35d73aSChao Yu if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode)))) 1006dc35d73aSChao Yu return false; 10075db479f0SChao Yu return !cluster_has_invalid_data(cc); 10084c8ff709SChao Yu } 10094c8ff709SChao Yu 10104c8ff709SChao Yu static void set_cluster_writeback(struct compress_ctx *cc) 10114c8ff709SChao Yu { 10124c8ff709SChao Yu int i; 10134c8ff709SChao Yu 10144c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 10154c8ff709SChao Yu if (cc->rpages[i]) 10164c8ff709SChao Yu set_page_writeback(cc->rpages[i]); 10174c8ff709SChao Yu } 10184c8ff709SChao Yu } 10194c8ff709SChao Yu 10204c8ff709SChao Yu static void set_cluster_dirty(struct compress_ctx *cc) 10214c8ff709SChao Yu { 10224c8ff709SChao Yu int i; 10234c8ff709SChao Yu 10244c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) 10254c8ff709SChao Yu if (cc->rpages[i]) 10264c8ff709SChao Yu set_page_dirty(cc->rpages[i]); 10274c8ff709SChao Yu } 10284c8ff709SChao Yu 10294c8ff709SChao Yu static int prepare_compress_overwrite(struct compress_ctx *cc, 10304c8ff709SChao Yu struct page **pagep, pgoff_t index, void **fsdata) 10314c8ff709SChao Yu { 10324c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); 10334c8ff709SChao Yu struct address_space *mapping = cc->inode->i_mapping; 10344c8ff709SChao Yu struct page *page; 10354c8ff709SChao Yu sector_t last_block_in_bio; 10364c8ff709SChao Yu unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; 10374c8ff709SChao Yu pgoff_t start_idx = start_idx_of_cluster(cc); 10384c8ff709SChao Yu int i, ret; 10394c8ff709SChao Yu 10404c8ff709SChao Yu retry: 104191f0fb69SChao Yu ret = f2fs_is_compressed_cluster(cc->inode, start_idx); 10424c8ff709SChao Yu if (ret <= 0) 10434c8ff709SChao Yu return ret; 10444c8ff709SChao Yu 10454c8ff709SChao Yu ret = f2fs_init_compress_ctx(cc); 10464c8ff709SChao Yu if (ret) 10474c8ff709SChao Yu return ret; 10484c8ff709SChao Yu 10494c8ff709SChao Yu /* keep page reference to avoid page reclaim */ 10504c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 10514c8ff709SChao Yu page = f2fs_pagecache_get_page(mapping, start_idx + i, 10524c8ff709SChao Yu fgp_flag, GFP_NOFS); 10534c8ff709SChao Yu if (!page) { 10544c8ff709SChao Yu ret = -ENOMEM; 10554c8ff709SChao Yu goto unlock_pages; 10564c8ff709SChao Yu } 10574c8ff709SChao Yu 10584c8ff709SChao Yu if (PageUptodate(page)) 1059a949dc5fSChao Yu f2fs_put_page(page, 1); 10604c8ff709SChao Yu else 10614c8ff709SChao Yu f2fs_compress_ctx_add_page(cc, page); 10624c8ff709SChao Yu } 10634c8ff709SChao Yu 10644c8ff709SChao Yu if (!f2fs_cluster_is_empty(cc)) { 10654c8ff709SChao Yu struct bio *bio = NULL; 10664c8ff709SChao Yu 10674c8ff709SChao Yu ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size, 10680683728aSChao Yu &last_block_in_bio, false, true); 1069a949dc5fSChao Yu f2fs_put_rpages(cc); 10708bfbfb0dSChao Yu f2fs_destroy_compress_ctx(cc, true); 10714c8ff709SChao Yu if (ret) 1072a949dc5fSChao Yu goto out; 10734c8ff709SChao Yu if (bio) 1074bc29835aSChristoph Hellwig f2fs_submit_read_bio(sbi, bio, DATA); 10754c8ff709SChao Yu 10764c8ff709SChao Yu ret = f2fs_init_compress_ctx(cc); 10774c8ff709SChao Yu if (ret) 1078a949dc5fSChao Yu goto out; 10794c8ff709SChao Yu } 10804c8ff709SChao Yu 10814c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 10824c8ff709SChao Yu f2fs_bug_on(sbi, cc->rpages[i]); 10834c8ff709SChao Yu 10844c8ff709SChao Yu page = find_lock_page(mapping, start_idx + i); 1085a949dc5fSChao Yu if (!page) { 1086a949dc5fSChao Yu /* page can be truncated */ 1087a949dc5fSChao Yu goto release_and_retry; 1088a949dc5fSChao Yu } 10894c8ff709SChao Yu 10904c8ff709SChao Yu f2fs_wait_on_page_writeback(page, DATA, true, true); 10914c8ff709SChao Yu f2fs_compress_ctx_add_page(cc, page); 10924c8ff709SChao Yu 10934c8ff709SChao Yu if (!PageUptodate(page)) { 1094a949dc5fSChao Yu release_and_retry: 1095a949dc5fSChao Yu f2fs_put_rpages(cc); 10964c8ff709SChao Yu f2fs_unlock_rpages(cc, i + 1); 10978bfbfb0dSChao Yu f2fs_destroy_compress_ctx(cc, true); 10984c8ff709SChao Yu goto retry; 10994c8ff709SChao Yu } 11004c8ff709SChao Yu } 11014c8ff709SChao Yu 11024c8ff709SChao Yu if (likely(!ret)) { 11034c8ff709SChao Yu *fsdata = cc->rpages; 11044c8ff709SChao Yu *pagep = cc->rpages[offset_in_cluster(cc, index)]; 11054c8ff709SChao Yu return cc->cluster_size; 11064c8ff709SChao Yu } 11074c8ff709SChao Yu 11084c8ff709SChao Yu unlock_pages: 1109a949dc5fSChao Yu f2fs_put_rpages(cc); 11104c8ff709SChao Yu f2fs_unlock_rpages(cc, i); 11118bfbfb0dSChao Yu f2fs_destroy_compress_ctx(cc, true); 1112a949dc5fSChao Yu out: 11134c8ff709SChao Yu return ret; 11144c8ff709SChao Yu } 11154c8ff709SChao Yu 11164c8ff709SChao Yu int f2fs_prepare_compress_overwrite(struct inode *inode, 11174c8ff709SChao Yu struct page **pagep, pgoff_t index, void **fsdata) 11184c8ff709SChao Yu { 11194c8ff709SChao Yu struct compress_ctx cc = { 11204c8ff709SChao Yu .inode = inode, 11214c8ff709SChao Yu .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, 11224c8ff709SChao Yu .cluster_size = F2FS_I(inode)->i_cluster_size, 11234c8ff709SChao Yu .cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size, 11244c8ff709SChao Yu .rpages = NULL, 11254c8ff709SChao Yu .nr_rpages = 0, 11264c8ff709SChao Yu }; 11274c8ff709SChao Yu 11284c8ff709SChao Yu return prepare_compress_overwrite(&cc, pagep, index, fsdata); 11294c8ff709SChao Yu } 11304c8ff709SChao Yu 11314c8ff709SChao Yu bool f2fs_compress_write_end(struct inode *inode, void *fsdata, 11324c8ff709SChao Yu pgoff_t index, unsigned copied) 11334c8ff709SChao Yu 11344c8ff709SChao Yu { 11354c8ff709SChao Yu struct compress_ctx cc = { 113631083031SChao Yu .inode = inode, 11374c8ff709SChao Yu .log_cluster_size = F2FS_I(inode)->i_log_cluster_size, 11384c8ff709SChao Yu .cluster_size = F2FS_I(inode)->i_cluster_size, 11394c8ff709SChao Yu .rpages = fsdata, 11404c8ff709SChao Yu }; 11414c8ff709SChao Yu bool first_index = (index == cc.rpages[0]->index); 11424c8ff709SChao Yu 11434c8ff709SChao Yu if (copied) 11444c8ff709SChao Yu set_cluster_dirty(&cc); 11454c8ff709SChao Yu 11464c8ff709SChao Yu f2fs_put_rpages_wbc(&cc, NULL, false, 1); 11478bfbfb0dSChao Yu f2fs_destroy_compress_ctx(&cc, false); 11484c8ff709SChao Yu 11494c8ff709SChao Yu return first_index; 11504c8ff709SChao Yu } 11514c8ff709SChao Yu 11523265d3dbSChao Yu int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock) 11533265d3dbSChao Yu { 11543265d3dbSChao Yu void *fsdata = NULL; 11553265d3dbSChao Yu struct page *pagep; 11563265d3dbSChao Yu int log_cluster_size = F2FS_I(inode)->i_log_cluster_size; 11573265d3dbSChao Yu pgoff_t start_idx = from >> (PAGE_SHIFT + log_cluster_size) << 11583265d3dbSChao Yu log_cluster_size; 11593265d3dbSChao Yu int err; 11603265d3dbSChao Yu 11613265d3dbSChao Yu err = f2fs_is_compressed_cluster(inode, start_idx); 11623265d3dbSChao Yu if (err < 0) 11633265d3dbSChao Yu return err; 11643265d3dbSChao Yu 11653265d3dbSChao Yu /* truncate normal cluster */ 11663265d3dbSChao Yu if (!err) 11673265d3dbSChao Yu return f2fs_do_truncate_blocks(inode, from, lock); 11683265d3dbSChao Yu 11693265d3dbSChao Yu /* truncate compressed cluster */ 11703265d3dbSChao Yu err = f2fs_prepare_compress_overwrite(inode, &pagep, 11713265d3dbSChao Yu start_idx, &fsdata); 11723265d3dbSChao Yu 11733265d3dbSChao Yu /* should not be a normal cluster */ 11743265d3dbSChao Yu f2fs_bug_on(F2FS_I_SB(inode), err == 0); 11753265d3dbSChao Yu 11763265d3dbSChao Yu if (err <= 0) 11773265d3dbSChao Yu return err; 11783265d3dbSChao Yu 11793265d3dbSChao Yu if (err > 0) { 11803265d3dbSChao Yu struct page **rpages = fsdata; 11813265d3dbSChao Yu int cluster_size = F2FS_I(inode)->i_cluster_size; 11823265d3dbSChao Yu int i; 11833265d3dbSChao Yu 11843265d3dbSChao Yu for (i = cluster_size - 1; i >= 0; i--) { 11853265d3dbSChao Yu loff_t start = rpages[i]->index << PAGE_SHIFT; 11863265d3dbSChao Yu 11873265d3dbSChao Yu if (from <= start) { 11883265d3dbSChao Yu zero_user_segment(rpages[i], 0, PAGE_SIZE); 11893265d3dbSChao Yu } else { 11903265d3dbSChao Yu zero_user_segment(rpages[i], from - start, 11913265d3dbSChao Yu PAGE_SIZE); 11923265d3dbSChao Yu break; 11933265d3dbSChao Yu } 11943265d3dbSChao Yu } 11953265d3dbSChao Yu 11963265d3dbSChao Yu f2fs_compress_write_end(inode, fsdata, start_idx, true); 11973265d3dbSChao Yu } 11983265d3dbSChao Yu return 0; 11993265d3dbSChao Yu } 12003265d3dbSChao Yu 12014c8ff709SChao Yu static int f2fs_write_compressed_pages(struct compress_ctx *cc, 12024c8ff709SChao Yu int *submitted, 12034c8ff709SChao Yu struct writeback_control *wbc, 12044c8ff709SChao Yu enum iostat_type io_type) 12054c8ff709SChao Yu { 12064c8ff709SChao Yu struct inode *inode = cc->inode; 12074c8ff709SChao Yu struct f2fs_sb_info *sbi = F2FS_I_SB(inode); 12084c8ff709SChao Yu struct f2fs_inode_info *fi = F2FS_I(inode); 12094c8ff709SChao Yu struct f2fs_io_info fio = { 12104c8ff709SChao Yu .sbi = sbi, 12114c8ff709SChao Yu .ino = cc->inode->i_ino, 12124c8ff709SChao Yu .type = DATA, 12134c8ff709SChao Yu .op = REQ_OP_WRITE, 12144c8ff709SChao Yu .op_flags = wbc_to_write_flags(wbc), 12154c8ff709SChao Yu .old_blkaddr = NEW_ADDR, 12164c8ff709SChao Yu .page = NULL, 12174c8ff709SChao Yu .encrypted_page = NULL, 12184c8ff709SChao Yu .compressed_page = NULL, 12192eae077eSChao Yu .submitted = 0, 12204c8ff709SChao Yu .io_type = io_type, 12214c8ff709SChao Yu .io_wbc = wbc, 12222eae077eSChao Yu .encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode) ? 12232eae077eSChao Yu 1 : 0, 12244c8ff709SChao Yu }; 12254c8ff709SChao Yu struct dnode_of_data dn; 12264c8ff709SChao Yu struct node_info ni; 12274c8ff709SChao Yu struct compress_io_ctx *cic; 12284c8ff709SChao Yu pgoff_t start_idx = start_idx_of_cluster(cc); 12294c8ff709SChao Yu unsigned int last_index = cc->cluster_size - 1; 12304c8ff709SChao Yu loff_t psize; 12314c8ff709SChao Yu int i, err; 12324c8ff709SChao Yu 1233146949deSJinyoung CHOI /* we should bypass data pages to proceed the kworker jobs */ 1234ee68d271SChao Yu if (unlikely(f2fs_cp_error(sbi))) { 1235ee68d271SChao Yu mapping_set_error(cc->rpages[0]->mapping, -EIO); 1236ee68d271SChao Yu goto out_free; 1237ee68d271SChao Yu } 1238ee68d271SChao Yu 123979963d96SChao Yu if (IS_NOQUOTA(inode)) { 124079963d96SChao Yu /* 124179963d96SChao Yu * We need to wait for node_write to avoid block allocation during 124279963d96SChao Yu * checkpoint. This can only happen to quota writes which can cause 124379963d96SChao Yu * the below discard race condition. 124479963d96SChao Yu */ 1245e4544b63STim Murray f2fs_down_read(&sbi->node_write); 124679963d96SChao Yu } else if (!f2fs_trylock_op(sbi)) { 124731083031SChao Yu goto out_free; 124879963d96SChao Yu } 12494c8ff709SChao Yu 1250df77fbd8SChao Yu set_new_dnode(&dn, cc->inode, NULL, NULL, 0); 12514c8ff709SChao Yu 12524c8ff709SChao Yu err = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); 12534c8ff709SChao Yu if (err) 12544c8ff709SChao Yu goto out_unlock_op; 12554c8ff709SChao Yu 12564c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 1257a2ced1ceSChao Yu if (data_blkaddr(dn.inode, dn.node_page, 12584c8ff709SChao Yu dn.ofs_in_node + i) == NULL_ADDR) 12594c8ff709SChao Yu goto out_put_dnode; 12604c8ff709SChao Yu } 12614c8ff709SChao Yu 12624c8ff709SChao Yu psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT; 12634c8ff709SChao Yu 1264a9419b63SJaegeuk Kim err = f2fs_get_node_info(fio.sbi, dn.nid, &ni, false); 12654c8ff709SChao Yu if (err) 12664c8ff709SChao Yu goto out_put_dnode; 12674c8ff709SChao Yu 12684c8ff709SChao Yu fio.version = ni.version; 12694c8ff709SChao Yu 127032410577SChao Yu cic = f2fs_kmem_cache_alloc(cic_entry_slab, GFP_F2FS_ZERO, false, sbi); 12714c8ff709SChao Yu if (!cic) 12724c8ff709SChao Yu goto out_put_dnode; 12734c8ff709SChao Yu 12744c8ff709SChao Yu cic->magic = F2FS_COMPRESSED_PAGE_MAGIC; 12754c8ff709SChao Yu cic->inode = inode; 12763271d7ebSFengnan Chang atomic_set(&cic->pending_pages, cc->valid_nr_cpages); 127731083031SChao Yu cic->rpages = page_array_alloc(cc->inode, cc->cluster_size); 12784c8ff709SChao Yu if (!cic->rpages) 12794c8ff709SChao Yu goto out_put_cic; 12804c8ff709SChao Yu 12814c8ff709SChao Yu cic->nr_rpages = cc->cluster_size; 12824c8ff709SChao Yu 12833271d7ebSFengnan Chang for (i = 0; i < cc->valid_nr_cpages; i++) { 12844c8ff709SChao Yu f2fs_set_compressed_page(cc->cpages[i], inode, 1285887347a0SChao Yu cc->rpages[i + 1]->index, cic); 12864c8ff709SChao Yu fio.compressed_page = cc->cpages[i]; 1287f567adb0SChao Yu 1288f567adb0SChao Yu fio.old_blkaddr = data_blkaddr(dn.inode, dn.node_page, 1289f567adb0SChao Yu dn.ofs_in_node + i + 1); 1290f567adb0SChao Yu 1291f567adb0SChao Yu /* wait for GCed page writeback via META_MAPPING */ 1292f567adb0SChao Yu f2fs_wait_on_block_writeback(inode, fio.old_blkaddr); 1293f567adb0SChao Yu 12944c8ff709SChao Yu if (fio.encrypted) { 12954c8ff709SChao Yu fio.page = cc->rpages[i + 1]; 12964c8ff709SChao Yu err = f2fs_encrypt_one_page(&fio); 12974c8ff709SChao Yu if (err) 12984c8ff709SChao Yu goto out_destroy_crypt; 12994c8ff709SChao Yu cc->cpages[i] = fio.encrypted_page; 13004c8ff709SChao Yu } 13014c8ff709SChao Yu } 13024c8ff709SChao Yu 13034c8ff709SChao Yu set_cluster_writeback(cc); 13044c8ff709SChao Yu 13054c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) 13064c8ff709SChao Yu cic->rpages[i] = cc->rpages[i]; 13074c8ff709SChao Yu 13084c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++, dn.ofs_in_node++) { 13094c8ff709SChao Yu block_t blkaddr; 13104c8ff709SChao Yu 1311a2ced1ceSChao Yu blkaddr = f2fs_data_blkaddr(&dn); 131295978caaSChao Yu fio.page = cc->rpages[i]; 13134c8ff709SChao Yu fio.old_blkaddr = blkaddr; 13144c8ff709SChao Yu 13154c8ff709SChao Yu /* cluster header */ 13164c8ff709SChao Yu if (i == 0) { 13174c8ff709SChao Yu if (blkaddr == COMPRESS_ADDR) 13184c8ff709SChao Yu fio.compr_blocks++; 13194c8ff709SChao Yu if (__is_valid_data_blkaddr(blkaddr)) 13204c8ff709SChao Yu f2fs_invalidate_blocks(sbi, blkaddr); 13214c8ff709SChao Yu f2fs_update_data_blkaddr(&dn, COMPRESS_ADDR); 13224c8ff709SChao Yu goto unlock_continue; 13234c8ff709SChao Yu } 13244c8ff709SChao Yu 13254c8ff709SChao Yu if (fio.compr_blocks && __is_valid_data_blkaddr(blkaddr)) 13264c8ff709SChao Yu fio.compr_blocks++; 13274c8ff709SChao Yu 13283271d7ebSFengnan Chang if (i > cc->valid_nr_cpages) { 13294c8ff709SChao Yu if (__is_valid_data_blkaddr(blkaddr)) { 13304c8ff709SChao Yu f2fs_invalidate_blocks(sbi, blkaddr); 13314c8ff709SChao Yu f2fs_update_data_blkaddr(&dn, NEW_ADDR); 13324c8ff709SChao Yu } 13334c8ff709SChao Yu goto unlock_continue; 13344c8ff709SChao Yu } 13354c8ff709SChao Yu 13364c8ff709SChao Yu f2fs_bug_on(fio.sbi, blkaddr == NULL_ADDR); 13374c8ff709SChao Yu 13384c8ff709SChao Yu if (fio.encrypted) 13394c8ff709SChao Yu fio.encrypted_page = cc->cpages[i - 1]; 13404c8ff709SChao Yu else 13414c8ff709SChao Yu fio.compressed_page = cc->cpages[i - 1]; 13424c8ff709SChao Yu 13434c8ff709SChao Yu cc->cpages[i - 1] = NULL; 13444c8ff709SChao Yu f2fs_outplace_write_data(&dn, &fio); 13454c8ff709SChao Yu (*submitted)++; 13464c8ff709SChao Yu unlock_continue: 13474c8ff709SChao Yu inode_dec_dirty_pages(cc->inode); 13484c8ff709SChao Yu unlock_page(fio.page); 13494c8ff709SChao Yu } 13504c8ff709SChao Yu 13514c8ff709SChao Yu if (fio.compr_blocks) 13524c8ff709SChao Yu f2fs_i_compr_blocks_update(inode, fio.compr_blocks - 1, false); 13533271d7ebSFengnan Chang f2fs_i_compr_blocks_update(inode, cc->valid_nr_cpages, true); 13543271d7ebSFengnan Chang add_compr_block_stat(inode, cc->valid_nr_cpages); 13554c8ff709SChao Yu 13564c8ff709SChao Yu set_inode_flag(cc->inode, FI_APPEND_WRITE); 13574c8ff709SChao Yu if (cc->cluster_idx == 0) 13584c8ff709SChao Yu set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); 13594c8ff709SChao Yu 13604c8ff709SChao Yu f2fs_put_dnode(&dn); 136179963d96SChao Yu if (IS_NOQUOTA(inode)) 1362e4544b63STim Murray f2fs_up_read(&sbi->node_write); 136379963d96SChao Yu else 13644c8ff709SChao Yu f2fs_unlock_op(sbi); 13654c8ff709SChao Yu 1366c10c9820SChao Yu spin_lock(&fi->i_size_lock); 13674c8ff709SChao Yu if (fi->last_disk_size < psize) 13684c8ff709SChao Yu fi->last_disk_size = psize; 1369c10c9820SChao Yu spin_unlock(&fi->i_size_lock); 13704c8ff709SChao Yu 13714c8ff709SChao Yu f2fs_put_rpages(cc); 137231083031SChao Yu page_array_free(cc->inode, cc->cpages, cc->nr_cpages); 137331083031SChao Yu cc->cpages = NULL; 13748bfbfb0dSChao Yu f2fs_destroy_compress_ctx(cc, false); 13754c8ff709SChao Yu return 0; 13764c8ff709SChao Yu 13774c8ff709SChao Yu out_destroy_crypt: 137831083031SChao Yu page_array_free(cc->inode, cic->rpages, cc->cluster_size); 13794c8ff709SChao Yu 13804c8ff709SChao Yu for (--i; i >= 0; i--) 13814c8ff709SChao Yu fscrypt_finalize_bounce_page(&cc->cpages[i]); 13824c8ff709SChao Yu out_put_cic: 1383c68d6c88SChao Yu kmem_cache_free(cic_entry_slab, cic); 13844c8ff709SChao Yu out_put_dnode: 13854c8ff709SChao Yu f2fs_put_dnode(&dn); 13864c8ff709SChao Yu out_unlock_op: 138779963d96SChao Yu if (IS_NOQUOTA(inode)) 1388e4544b63STim Murray f2fs_up_read(&sbi->node_write); 138979963d96SChao Yu else 13904c8ff709SChao Yu f2fs_unlock_op(sbi); 139131083031SChao Yu out_free: 13923271d7ebSFengnan Chang for (i = 0; i < cc->valid_nr_cpages; i++) { 1393827f0284SJaegeuk Kim f2fs_compress_free_page(cc->cpages[i]); 1394827f0284SJaegeuk Kim cc->cpages[i] = NULL; 1395827f0284SJaegeuk Kim } 139631083031SChao Yu page_array_free(cc->inode, cc->cpages, cc->nr_cpages); 139731083031SChao Yu cc->cpages = NULL; 13984c8ff709SChao Yu return -EAGAIN; 13994c8ff709SChao Yu } 14004c8ff709SChao Yu 14014c8ff709SChao Yu void f2fs_compress_write_end_io(struct bio *bio, struct page *page) 14024c8ff709SChao Yu { 14034c8ff709SChao Yu struct f2fs_sb_info *sbi = bio->bi_private; 14044c8ff709SChao Yu struct compress_io_ctx *cic = 14054c8ff709SChao Yu (struct compress_io_ctx *)page_private(page); 14064c8ff709SChao Yu int i; 14074c8ff709SChao Yu 14084c8ff709SChao Yu if (unlikely(bio->bi_status)) 14094c8ff709SChao Yu mapping_set_error(cic->inode->i_mapping, -EIO); 14104c8ff709SChao Yu 14115e6bbde9SChao Yu f2fs_compress_free_page(page); 14124c8ff709SChao Yu 14134c8ff709SChao Yu dec_page_count(sbi, F2FS_WB_DATA); 14144c8ff709SChao Yu 1415e6c3948dSChao Yu if (atomic_dec_return(&cic->pending_pages)) 14164c8ff709SChao Yu return; 14174c8ff709SChao Yu 14184c8ff709SChao Yu for (i = 0; i < cic->nr_rpages; i++) { 14194c8ff709SChao Yu WARN_ON(!cic->rpages[i]); 1420b763f3beSChao Yu clear_page_private_gcing(cic->rpages[i]); 14214c8ff709SChao Yu end_page_writeback(cic->rpages[i]); 14224c8ff709SChao Yu } 14234c8ff709SChao Yu 142431083031SChao Yu page_array_free(cic->inode, cic->rpages, cic->nr_rpages); 1425c68d6c88SChao Yu kmem_cache_free(cic_entry_slab, cic); 14264c8ff709SChao Yu } 14274c8ff709SChao Yu 14284c8ff709SChao Yu static int f2fs_write_raw_pages(struct compress_ctx *cc, 14294c8ff709SChao Yu int *submitted, 14304c8ff709SChao Yu struct writeback_control *wbc, 14314c8ff709SChao Yu enum iostat_type io_type) 14324c8ff709SChao Yu { 14334c8ff709SChao Yu struct address_space *mapping = cc->inode->i_mapping; 14347377e853SHyeong-Jun Kim int _submitted, compr_blocks, ret, i; 14354c8ff709SChao Yu 14364c8ff709SChao Yu compr_blocks = f2fs_compressed_blocks(cc); 14377377e853SHyeong-Jun Kim 14387377e853SHyeong-Jun Kim for (i = 0; i < cc->cluster_size; i++) { 14397377e853SHyeong-Jun Kim if (!cc->rpages[i]) 14407377e853SHyeong-Jun Kim continue; 14417377e853SHyeong-Jun Kim 14427377e853SHyeong-Jun Kim redirty_page_for_writepage(wbc, cc->rpages[i]); 14437377e853SHyeong-Jun Kim unlock_page(cc->rpages[i]); 14444c8ff709SChao Yu } 14454c8ff709SChao Yu 14467377e853SHyeong-Jun Kim if (compr_blocks < 0) 14477377e853SHyeong-Jun Kim return compr_blocks; 14487377e853SHyeong-Jun Kim 14494c8ff709SChao Yu for (i = 0; i < cc->cluster_size; i++) { 14504c8ff709SChao Yu if (!cc->rpages[i]) 14514c8ff709SChao Yu continue; 14524c8ff709SChao Yu retry_write: 14537377e853SHyeong-Jun Kim lock_page(cc->rpages[i]); 14547377e853SHyeong-Jun Kim 14554c8ff709SChao Yu if (cc->rpages[i]->mapping != mapping) { 14567377e853SHyeong-Jun Kim continue_unlock: 14574c8ff709SChao Yu unlock_page(cc->rpages[i]); 14584c8ff709SChao Yu continue; 14594c8ff709SChao Yu } 14604c8ff709SChao Yu 14617377e853SHyeong-Jun Kim if (!PageDirty(cc->rpages[i])) 14627377e853SHyeong-Jun Kim goto continue_unlock; 14637377e853SHyeong-Jun Kim 1464babedcbaSYangtao Li if (PageWriteback(cc->rpages[i])) { 1465babedcbaSYangtao Li if (wbc->sync_mode == WB_SYNC_NONE) 1466babedcbaSYangtao Li goto continue_unlock; 1467babedcbaSYangtao Li f2fs_wait_on_page_writeback(cc->rpages[i], DATA, true, true); 1468babedcbaSYangtao Li } 1469babedcbaSYangtao Li 14707377e853SHyeong-Jun Kim if (!clear_page_dirty_for_io(cc->rpages[i])) 14717377e853SHyeong-Jun Kim goto continue_unlock; 14724c8ff709SChao Yu 14734c8ff709SChao Yu ret = f2fs_write_single_data_page(cc->rpages[i], &_submitted, 14744c8ff709SChao Yu NULL, NULL, wbc, io_type, 14753afae09fSChao Yu compr_blocks, false); 14764c8ff709SChao Yu if (ret) { 14774c8ff709SChao Yu if (ret == AOP_WRITEPAGE_ACTIVATE) { 14784c8ff709SChao Yu unlock_page(cc->rpages[i]); 14794c8ff709SChao Yu ret = 0; 14804c8ff709SChao Yu } else if (ret == -EAGAIN) { 1481466357dcSChao Yu /* 1482466357dcSChao Yu * for quota file, just redirty left pages to 1483466357dcSChao Yu * avoid deadlock caused by cluster update race 1484466357dcSChao Yu * from foreground operation. 1485466357dcSChao Yu */ 14867377e853SHyeong-Jun Kim if (IS_NOQUOTA(cc->inode)) 14877377e853SHyeong-Jun Kim return 0; 14884c8ff709SChao Yu ret = 0; 1489a64239d0SNeilBrown f2fs_io_schedule_timeout(DEFAULT_IO_TIMEOUT); 14904c8ff709SChao Yu goto retry_write; 14914c8ff709SChao Yu } 14927377e853SHyeong-Jun Kim return ret; 14934c8ff709SChao Yu } 14944c8ff709SChao Yu 14954c8ff709SChao Yu *submitted += _submitted; 14964c8ff709SChao Yu } 14973afae09fSChao Yu 14983afae09fSChao Yu f2fs_balance_fs(F2FS_M_SB(mapping), true); 14993afae09fSChao Yu 15004c8ff709SChao Yu return 0; 15014c8ff709SChao Yu } 15024c8ff709SChao Yu 15034c8ff709SChao Yu int f2fs_write_multi_pages(struct compress_ctx *cc, 15044c8ff709SChao Yu int *submitted, 15054c8ff709SChao Yu struct writeback_control *wbc, 15064c8ff709SChao Yu enum iostat_type io_type) 15074c8ff709SChao Yu { 15084c8ff709SChao Yu int err; 15094c8ff709SChao Yu 15104c8ff709SChao Yu *submitted = 0; 15114c8ff709SChao Yu if (cluster_may_compress(cc)) { 15124c8ff709SChao Yu err = f2fs_compress_pages(cc); 15134c8ff709SChao Yu if (err == -EAGAIN) { 151409631cf3SDaeho Jeong add_compr_block_stat(cc->inode, cc->cluster_size); 15154c8ff709SChao Yu goto write; 15164c8ff709SChao Yu } else if (err) { 15174c8ff709SChao Yu f2fs_put_rpages_wbc(cc, wbc, true, 1); 15184c8ff709SChao Yu goto destroy_out; 15194c8ff709SChao Yu } 15204c8ff709SChao Yu 15214c8ff709SChao Yu err = f2fs_write_compressed_pages(cc, submitted, 15224c8ff709SChao Yu wbc, io_type); 15234c8ff709SChao Yu if (!err) 15244c8ff709SChao Yu return 0; 15254c8ff709SChao Yu f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN); 15264c8ff709SChao Yu } 15274c8ff709SChao Yu write: 15284c8ff709SChao Yu f2fs_bug_on(F2FS_I_SB(cc->inode), *submitted); 15294c8ff709SChao Yu 15304c8ff709SChao Yu err = f2fs_write_raw_pages(cc, submitted, wbc, io_type); 15314c8ff709SChao Yu f2fs_put_rpages_wbc(cc, wbc, false, 0); 15324c8ff709SChao Yu destroy_out: 15338bfbfb0dSChao Yu f2fs_destroy_compress_ctx(cc, false); 15344c8ff709SChao Yu return err; 15354c8ff709SChao Yu } 15364c8ff709SChao Yu 1537bff139b4SDaeho Jeong static inline bool allow_memalloc_for_decomp(struct f2fs_sb_info *sbi, 1538bff139b4SDaeho Jeong bool pre_alloc) 1539bff139b4SDaeho Jeong { 1540bff139b4SDaeho Jeong return pre_alloc ^ f2fs_low_mem_mode(sbi); 1541bff139b4SDaeho Jeong } 1542bff139b4SDaeho Jeong 1543bff139b4SDaeho Jeong static int f2fs_prepare_decomp_mem(struct decompress_io_ctx *dic, 1544bff139b4SDaeho Jeong bool pre_alloc) 1545bff139b4SDaeho Jeong { 1546bff139b4SDaeho Jeong const struct f2fs_compress_ops *cops = 1547bff139b4SDaeho Jeong f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; 1548bff139b4SDaeho Jeong int i; 1549bff139b4SDaeho Jeong 1550bff139b4SDaeho Jeong if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) 1551bff139b4SDaeho Jeong return 0; 1552bff139b4SDaeho Jeong 1553bff139b4SDaeho Jeong dic->tpages = page_array_alloc(dic->inode, dic->cluster_size); 1554bff139b4SDaeho Jeong if (!dic->tpages) 1555bff139b4SDaeho Jeong return -ENOMEM; 1556bff139b4SDaeho Jeong 1557bff139b4SDaeho Jeong for (i = 0; i < dic->cluster_size; i++) { 1558bff139b4SDaeho Jeong if (dic->rpages[i]) { 1559bff139b4SDaeho Jeong dic->tpages[i] = dic->rpages[i]; 1560bff139b4SDaeho Jeong continue; 1561bff139b4SDaeho Jeong } 1562bff139b4SDaeho Jeong 1563bff139b4SDaeho Jeong dic->tpages[i] = f2fs_compress_alloc_page(); 1564bff139b4SDaeho Jeong if (!dic->tpages[i]) 1565bff139b4SDaeho Jeong return -ENOMEM; 1566bff139b4SDaeho Jeong } 1567bff139b4SDaeho Jeong 1568bff139b4SDaeho Jeong dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size); 1569bff139b4SDaeho Jeong if (!dic->rbuf) 1570bff139b4SDaeho Jeong return -ENOMEM; 1571bff139b4SDaeho Jeong 1572bff139b4SDaeho Jeong dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages); 1573bff139b4SDaeho Jeong if (!dic->cbuf) 1574bff139b4SDaeho Jeong return -ENOMEM; 1575bff139b4SDaeho Jeong 15768140654eSZhang Qilong if (cops->init_decompress_ctx) 15778140654eSZhang Qilong return cops->init_decompress_ctx(dic); 1578bff139b4SDaeho Jeong 1579bff139b4SDaeho Jeong return 0; 1580bff139b4SDaeho Jeong } 1581bff139b4SDaeho Jeong 1582bff139b4SDaeho Jeong static void f2fs_release_decomp_mem(struct decompress_io_ctx *dic, 1583bff139b4SDaeho Jeong bool bypass_destroy_callback, bool pre_alloc) 1584bff139b4SDaeho Jeong { 1585bff139b4SDaeho Jeong const struct f2fs_compress_ops *cops = 1586bff139b4SDaeho Jeong f2fs_cops[F2FS_I(dic->inode)->i_compress_algorithm]; 1587bff139b4SDaeho Jeong 1588bff139b4SDaeho Jeong if (!allow_memalloc_for_decomp(F2FS_I_SB(dic->inode), pre_alloc)) 1589bff139b4SDaeho Jeong return; 1590bff139b4SDaeho Jeong 1591bff139b4SDaeho Jeong if (!bypass_destroy_callback && cops->destroy_decompress_ctx) 1592bff139b4SDaeho Jeong cops->destroy_decompress_ctx(dic); 1593bff139b4SDaeho Jeong 1594bff139b4SDaeho Jeong if (dic->cbuf) 1595bff139b4SDaeho Jeong vm_unmap_ram(dic->cbuf, dic->nr_cpages); 1596bff139b4SDaeho Jeong 1597bff139b4SDaeho Jeong if (dic->rbuf) 1598bff139b4SDaeho Jeong vm_unmap_ram(dic->rbuf, dic->cluster_size); 1599bff139b4SDaeho Jeong } 1600bff139b4SDaeho Jeong 1601bff139b4SDaeho Jeong static void f2fs_free_dic(struct decompress_io_ctx *dic, 1602bff139b4SDaeho Jeong bool bypass_destroy_callback); 16037f59b277SEric Biggers 16044c8ff709SChao Yu struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) 16054c8ff709SChao Yu { 16064c8ff709SChao Yu struct decompress_io_ctx *dic; 16074c8ff709SChao Yu pgoff_t start_idx = start_idx_of_cluster(cc); 1608bff139b4SDaeho Jeong struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); 1609bff139b4SDaeho Jeong int i, ret; 16104c8ff709SChao Yu 1611bff139b4SDaeho Jeong dic = f2fs_kmem_cache_alloc(dic_entry_slab, GFP_F2FS_ZERO, false, sbi); 16124c8ff709SChao Yu if (!dic) 16134c8ff709SChao Yu return ERR_PTR(-ENOMEM); 16144c8ff709SChao Yu 161531083031SChao Yu dic->rpages = page_array_alloc(cc->inode, cc->cluster_size); 16164c8ff709SChao Yu if (!dic->rpages) { 1617c68d6c88SChao Yu kmem_cache_free(dic_entry_slab, dic); 16184c8ff709SChao Yu return ERR_PTR(-ENOMEM); 16194c8ff709SChao Yu } 16204c8ff709SChao Yu 16214c8ff709SChao Yu dic->magic = F2FS_COMPRESSED_PAGE_MAGIC; 16224c8ff709SChao Yu dic->inode = cc->inode; 16237f59b277SEric Biggers atomic_set(&dic->remaining_pages, cc->nr_cpages); 16244c8ff709SChao Yu dic->cluster_idx = cc->cluster_idx; 16254c8ff709SChao Yu dic->cluster_size = cc->cluster_size; 16264c8ff709SChao Yu dic->log_cluster_size = cc->log_cluster_size; 16274c8ff709SChao Yu dic->nr_cpages = cc->nr_cpages; 16287f59b277SEric Biggers refcount_set(&dic->refcnt, 1); 16294c8ff709SChao Yu dic->failed = false; 16307f59b277SEric Biggers dic->need_verity = f2fs_need_verity(cc->inode, start_idx); 16314c8ff709SChao Yu 16324c8ff709SChao Yu for (i = 0; i < dic->cluster_size; i++) 16334c8ff709SChao Yu dic->rpages[i] = cc->rpages[i]; 16344c8ff709SChao Yu dic->nr_rpages = cc->cluster_size; 16354c8ff709SChao Yu 163631083031SChao Yu dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages); 1637bff139b4SDaeho Jeong if (!dic->cpages) { 1638bff139b4SDaeho Jeong ret = -ENOMEM; 16394c8ff709SChao Yu goto out_free; 1640bff139b4SDaeho Jeong } 16414c8ff709SChao Yu 16424c8ff709SChao Yu for (i = 0; i < dic->nr_cpages; i++) { 16434c8ff709SChao Yu struct page *page; 16444c8ff709SChao Yu 16455e6bbde9SChao Yu page = f2fs_compress_alloc_page(); 1646bff139b4SDaeho Jeong if (!page) { 1647bff139b4SDaeho Jeong ret = -ENOMEM; 16484c8ff709SChao Yu goto out_free; 1649bff139b4SDaeho Jeong } 16504c8ff709SChao Yu 16514c8ff709SChao Yu f2fs_set_compressed_page(page, cc->inode, 1652887347a0SChao Yu start_idx + i + 1, dic); 16534c8ff709SChao Yu dic->cpages[i] = page; 16544c8ff709SChao Yu } 16554c8ff709SChao Yu 1656bff139b4SDaeho Jeong ret = f2fs_prepare_decomp_mem(dic, true); 1657bff139b4SDaeho Jeong if (ret) 1658bff139b4SDaeho Jeong goto out_free; 1659bff139b4SDaeho Jeong 16604c8ff709SChao Yu return dic; 16614c8ff709SChao Yu 16624c8ff709SChao Yu out_free: 1663bff139b4SDaeho Jeong f2fs_free_dic(dic, true); 1664bff139b4SDaeho Jeong return ERR_PTR(ret); 16654c8ff709SChao Yu } 16664c8ff709SChao Yu 1667bff139b4SDaeho Jeong static void f2fs_free_dic(struct decompress_io_ctx *dic, 1668bff139b4SDaeho Jeong bool bypass_destroy_callback) 16694c8ff709SChao Yu { 16704c8ff709SChao Yu int i; 16714c8ff709SChao Yu 1672bff139b4SDaeho Jeong f2fs_release_decomp_mem(dic, bypass_destroy_callback, true); 1673bff139b4SDaeho Jeong 16744c8ff709SChao Yu if (dic->tpages) { 16754c8ff709SChao Yu for (i = 0; i < dic->cluster_size; i++) { 16764c8ff709SChao Yu if (dic->rpages[i]) 16774c8ff709SChao Yu continue; 16788908e753SChao Yu if (!dic->tpages[i]) 16798908e753SChao Yu continue; 16805e6bbde9SChao Yu f2fs_compress_free_page(dic->tpages[i]); 16814c8ff709SChao Yu } 168231083031SChao Yu page_array_free(dic->inode, dic->tpages, dic->cluster_size); 16834c8ff709SChao Yu } 16844c8ff709SChao Yu 16854c8ff709SChao Yu if (dic->cpages) { 16864c8ff709SChao Yu for (i = 0; i < dic->nr_cpages; i++) { 16874c8ff709SChao Yu if (!dic->cpages[i]) 16884c8ff709SChao Yu continue; 16895e6bbde9SChao Yu f2fs_compress_free_page(dic->cpages[i]); 16904c8ff709SChao Yu } 169131083031SChao Yu page_array_free(dic->inode, dic->cpages, dic->nr_cpages); 16924c8ff709SChao Yu } 16934c8ff709SChao Yu 169431083031SChao Yu page_array_free(dic->inode, dic->rpages, dic->nr_rpages); 1695c68d6c88SChao Yu kmem_cache_free(dic_entry_slab, dic); 16964c8ff709SChao Yu } 16974c8ff709SChao Yu 1698bff139b4SDaeho Jeong static void f2fs_late_free_dic(struct work_struct *work) 16997f59b277SEric Biggers { 1700bff139b4SDaeho Jeong struct decompress_io_ctx *dic = 1701bff139b4SDaeho Jeong container_of(work, struct decompress_io_ctx, free_work); 1702bff139b4SDaeho Jeong 1703bff139b4SDaeho Jeong f2fs_free_dic(dic, false); 1704bff139b4SDaeho Jeong } 1705bff139b4SDaeho Jeong 1706bff139b4SDaeho Jeong static void f2fs_put_dic(struct decompress_io_ctx *dic, bool in_task) 1707bff139b4SDaeho Jeong { 1708bff139b4SDaeho Jeong if (refcount_dec_and_test(&dic->refcnt)) { 1709bff139b4SDaeho Jeong if (in_task) { 1710bff139b4SDaeho Jeong f2fs_free_dic(dic, false); 1711bff139b4SDaeho Jeong } else { 1712bff139b4SDaeho Jeong INIT_WORK(&dic->free_work, f2fs_late_free_dic); 1713bff139b4SDaeho Jeong queue_work(F2FS_I_SB(dic->inode)->post_read_wq, 1714bff139b4SDaeho Jeong &dic->free_work); 1715bff139b4SDaeho Jeong } 1716bff139b4SDaeho Jeong } 17177f59b277SEric Biggers } 17187f59b277SEric Biggers 17197f59b277SEric Biggers static void f2fs_verify_cluster(struct work_struct *work) 17207f59b277SEric Biggers { 17217f59b277SEric Biggers struct decompress_io_ctx *dic = 17227f59b277SEric Biggers container_of(work, struct decompress_io_ctx, verity_work); 17237f59b277SEric Biggers int i; 17247f59b277SEric Biggers 172598dc08baSEric Biggers /* Verify, update, and unlock the decompressed pages. */ 17267f59b277SEric Biggers for (i = 0; i < dic->cluster_size; i++) { 17277f59b277SEric Biggers struct page *rpage = dic->rpages[i]; 17287f59b277SEric Biggers 172998dc08baSEric Biggers if (!rpage) 173098dc08baSEric Biggers continue; 173198dc08baSEric Biggers 173298dc08baSEric Biggers if (fsverity_verify_page(rpage)) 173398dc08baSEric Biggers SetPageUptodate(rpage); 173498dc08baSEric Biggers else 173598dc08baSEric Biggers ClearPageUptodate(rpage); 173698dc08baSEric Biggers unlock_page(rpage); 17377f59b277SEric Biggers } 17387f59b277SEric Biggers 173998dc08baSEric Biggers f2fs_put_dic(dic, true); 17407f59b277SEric Biggers } 17417f59b277SEric Biggers 17427f59b277SEric Biggers /* 17437f59b277SEric Biggers * This is called when a compressed cluster has been decompressed 17447f59b277SEric Biggers * (or failed to be read and/or decompressed). 17457f59b277SEric Biggers */ 1746bff139b4SDaeho Jeong void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed, 1747bff139b4SDaeho Jeong bool in_task) 17487f59b277SEric Biggers { 174998dc08baSEric Biggers int i; 175098dc08baSEric Biggers 17517f59b277SEric Biggers if (!failed && dic->need_verity) { 17527f59b277SEric Biggers /* 17537f59b277SEric Biggers * Note that to avoid deadlocks, the verity work can't be done 17547f59b277SEric Biggers * on the decompression workqueue. This is because verifying 17557f59b277SEric Biggers * the data pages can involve reading metadata pages from the 17567f59b277SEric Biggers * file, and these metadata pages may be compressed. 17577f59b277SEric Biggers */ 17587f59b277SEric Biggers INIT_WORK(&dic->verity_work, f2fs_verify_cluster); 17597f59b277SEric Biggers fsverity_enqueue_verify_work(&dic->verity_work); 176098dc08baSEric Biggers return; 17617f59b277SEric Biggers } 176298dc08baSEric Biggers 176398dc08baSEric Biggers /* Update and unlock the cluster's pagecache pages. */ 176498dc08baSEric Biggers for (i = 0; i < dic->cluster_size; i++) { 176598dc08baSEric Biggers struct page *rpage = dic->rpages[i]; 176698dc08baSEric Biggers 176798dc08baSEric Biggers if (!rpage) 176898dc08baSEric Biggers continue; 176998dc08baSEric Biggers 177098dc08baSEric Biggers if (failed) 177198dc08baSEric Biggers ClearPageUptodate(rpage); 177298dc08baSEric Biggers else 177398dc08baSEric Biggers SetPageUptodate(rpage); 177498dc08baSEric Biggers unlock_page(rpage); 177598dc08baSEric Biggers } 177698dc08baSEric Biggers 177798dc08baSEric Biggers /* 177898dc08baSEric Biggers * Release the reference to the decompress_io_ctx that was being held 177998dc08baSEric Biggers * for I/O completion. 178098dc08baSEric Biggers */ 178198dc08baSEric Biggers f2fs_put_dic(dic, in_task); 17827f59b277SEric Biggers } 17837f59b277SEric Biggers 17847f59b277SEric Biggers /* 17857f59b277SEric Biggers * Put a reference to a compressed page's decompress_io_ctx. 17867f59b277SEric Biggers * 17877f59b277SEric Biggers * This is called when the page is no longer needed and can be freed. 17887f59b277SEric Biggers */ 1789bff139b4SDaeho Jeong void f2fs_put_page_dic(struct page *page, bool in_task) 17907f59b277SEric Biggers { 17917f59b277SEric Biggers struct decompress_io_ctx *dic = 17927f59b277SEric Biggers (struct decompress_io_ctx *)page_private(page); 17937f59b277SEric Biggers 1794bff139b4SDaeho Jeong f2fs_put_dic(dic, in_task); 17954c8ff709SChao Yu } 179631083031SChao Yu 179794afd6d6SChao Yu /* 179894afd6d6SChao Yu * check whether cluster blocks are contiguous, and add extent cache entry 179994afd6d6SChao Yu * only if cluster blocks are logically and physically contiguous. 180094afd6d6SChao Yu */ 180194afd6d6SChao Yu unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn) 180294afd6d6SChao Yu { 180394afd6d6SChao Yu bool compressed = f2fs_data_blkaddr(dn) == COMPRESS_ADDR; 180494afd6d6SChao Yu int i = compressed ? 1 : 0; 180594afd6d6SChao Yu block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page, 180694afd6d6SChao Yu dn->ofs_in_node + i); 180794afd6d6SChao Yu 180894afd6d6SChao Yu for (i += 1; i < F2FS_I(dn->inode)->i_cluster_size; i++) { 180994afd6d6SChao Yu block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, 181094afd6d6SChao Yu dn->ofs_in_node + i); 181194afd6d6SChao Yu 181294afd6d6SChao Yu if (!__is_valid_data_blkaddr(blkaddr)) 181394afd6d6SChao Yu break; 181494afd6d6SChao Yu if (first_blkaddr + i - (compressed ? 1 : 0) != blkaddr) 181594afd6d6SChao Yu return 0; 181694afd6d6SChao Yu } 181794afd6d6SChao Yu 181894afd6d6SChao Yu return compressed ? i - 1 : i; 181994afd6d6SChao Yu } 182094afd6d6SChao Yu 18216ce19affSChao Yu const struct address_space_operations f2fs_compress_aops = { 1822c26cd045SMatthew Wilcox (Oracle) .release_folio = f2fs_release_folio, 182391503996SMatthew Wilcox (Oracle) .invalidate_folio = f2fs_invalidate_folio, 1824f35474ecSChao Yu .migrate_folio = filemap_migrate_folio, 18256ce19affSChao Yu }; 18266ce19affSChao Yu 18276ce19affSChao Yu struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi) 18286ce19affSChao Yu { 18296ce19affSChao Yu return sbi->compress_inode->i_mapping; 18306ce19affSChao Yu } 18316ce19affSChao Yu 18326ce19affSChao Yu void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr) 18336ce19affSChao Yu { 18346ce19affSChao Yu if (!sbi->compress_inode) 18356ce19affSChao Yu return; 18366ce19affSChao Yu invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr); 18376ce19affSChao Yu } 18386ce19affSChao Yu 18396ce19affSChao Yu void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, 18406ce19affSChao Yu nid_t ino, block_t blkaddr) 18416ce19affSChao Yu { 18426ce19affSChao Yu struct page *cpage; 18436ce19affSChao Yu int ret; 18446ce19affSChao Yu 18456ce19affSChao Yu if (!test_opt(sbi, COMPRESS_CACHE)) 18466ce19affSChao Yu return; 18476ce19affSChao Yu 18486ce19affSChao Yu if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) 18496ce19affSChao Yu return; 18506ce19affSChao Yu 18516ce19affSChao Yu if (!f2fs_available_free_memory(sbi, COMPRESS_PAGE)) 18526ce19affSChao Yu return; 18536ce19affSChao Yu 18546ce19affSChao Yu cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr); 18556ce19affSChao Yu if (cpage) { 18566ce19affSChao Yu f2fs_put_page(cpage, 0); 18576ce19affSChao Yu return; 18586ce19affSChao Yu } 18596ce19affSChao Yu 18606ce19affSChao Yu cpage = alloc_page(__GFP_NOWARN | __GFP_IO); 18616ce19affSChao Yu if (!cpage) 18626ce19affSChao Yu return; 18636ce19affSChao Yu 18646ce19affSChao Yu ret = add_to_page_cache_lru(cpage, COMPRESS_MAPPING(sbi), 18656ce19affSChao Yu blkaddr, GFP_NOFS); 18666ce19affSChao Yu if (ret) { 18676ce19affSChao Yu f2fs_put_page(cpage, 0); 18686ce19affSChao Yu return; 18696ce19affSChao Yu } 18706ce19affSChao Yu 18716ce19affSChao Yu set_page_private_data(cpage, ino); 18726ce19affSChao Yu 18736ce19affSChao Yu if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) 18746ce19affSChao Yu goto out; 18756ce19affSChao Yu 18766ce19affSChao Yu memcpy(page_address(cpage), page_address(page), PAGE_SIZE); 18776ce19affSChao Yu SetPageUptodate(cpage); 18786ce19affSChao Yu out: 18796ce19affSChao Yu f2fs_put_page(cpage, 1); 18806ce19affSChao Yu } 18816ce19affSChao Yu 18826ce19affSChao Yu bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page, 18836ce19affSChao Yu block_t blkaddr) 18846ce19affSChao Yu { 18856ce19affSChao Yu struct page *cpage; 18866ce19affSChao Yu bool hitted = false; 18876ce19affSChao Yu 18886ce19affSChao Yu if (!test_opt(sbi, COMPRESS_CACHE)) 18896ce19affSChao Yu return false; 18906ce19affSChao Yu 18916ce19affSChao Yu cpage = f2fs_pagecache_get_page(COMPRESS_MAPPING(sbi), 18926ce19affSChao Yu blkaddr, FGP_LOCK | FGP_NOWAIT, GFP_NOFS); 18936ce19affSChao Yu if (cpage) { 18946ce19affSChao Yu if (PageUptodate(cpage)) { 18956ce19affSChao Yu atomic_inc(&sbi->compress_page_hit); 18966ce19affSChao Yu memcpy(page_address(page), 18976ce19affSChao Yu page_address(cpage), PAGE_SIZE); 18986ce19affSChao Yu hitted = true; 18996ce19affSChao Yu } 19006ce19affSChao Yu f2fs_put_page(cpage, 1); 19016ce19affSChao Yu } 19026ce19affSChao Yu 19036ce19affSChao Yu return hitted; 19046ce19affSChao Yu } 19056ce19affSChao Yu 19066ce19affSChao Yu void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino) 19076ce19affSChao Yu { 1908173cdf2cSZhang Qilong struct address_space *mapping = COMPRESS_MAPPING(sbi); 1909bbfe4f66SMatthew Wilcox (Oracle) struct folio_batch fbatch; 19106ce19affSChao Yu pgoff_t index = 0; 19116ce19affSChao Yu pgoff_t end = MAX_BLKADDR(sbi); 19126ce19affSChao Yu 19136ce19affSChao Yu if (!mapping->nrpages) 19146ce19affSChao Yu return; 19156ce19affSChao Yu 1916bbfe4f66SMatthew Wilcox (Oracle) folio_batch_init(&fbatch); 19176ce19affSChao Yu 19186ce19affSChao Yu do { 1919bbfe4f66SMatthew Wilcox (Oracle) unsigned int nr, i; 19206ce19affSChao Yu 1921bbfe4f66SMatthew Wilcox (Oracle) nr = filemap_get_folios(mapping, &index, end - 1, &fbatch); 1922bbfe4f66SMatthew Wilcox (Oracle) if (!nr) 19236ce19affSChao Yu break; 19246ce19affSChao Yu 1925bbfe4f66SMatthew Wilcox (Oracle) for (i = 0; i < nr; i++) { 1926bbfe4f66SMatthew Wilcox (Oracle) struct folio *folio = fbatch.folios[i]; 19276ce19affSChao Yu 1928bbfe4f66SMatthew Wilcox (Oracle) folio_lock(folio); 1929bbfe4f66SMatthew Wilcox (Oracle) if (folio->mapping != mapping) { 1930bbfe4f66SMatthew Wilcox (Oracle) folio_unlock(folio); 19316ce19affSChao Yu continue; 19326ce19affSChao Yu } 19336ce19affSChao Yu 1934bbfe4f66SMatthew Wilcox (Oracle) if (ino != get_page_private_data(&folio->page)) { 1935bbfe4f66SMatthew Wilcox (Oracle) folio_unlock(folio); 19366ce19affSChao Yu continue; 19376ce19affSChao Yu } 19386ce19affSChao Yu 1939bbfe4f66SMatthew Wilcox (Oracle) generic_error_remove_page(mapping, &folio->page); 1940bbfe4f66SMatthew Wilcox (Oracle) folio_unlock(folio); 19416ce19affSChao Yu } 1942bbfe4f66SMatthew Wilcox (Oracle) folio_batch_release(&fbatch); 19436ce19affSChao Yu cond_resched(); 19446ce19affSChao Yu } while (index < end); 19456ce19affSChao Yu } 19466ce19affSChao Yu 19476ce19affSChao Yu int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) 19486ce19affSChao Yu { 19496ce19affSChao Yu struct inode *inode; 19506ce19affSChao Yu 19516ce19affSChao Yu if (!test_opt(sbi, COMPRESS_CACHE)) 19526ce19affSChao Yu return 0; 19536ce19affSChao Yu 19546ce19affSChao Yu inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi)); 19556ce19affSChao Yu if (IS_ERR(inode)) 19566ce19affSChao Yu return PTR_ERR(inode); 19576ce19affSChao Yu sbi->compress_inode = inode; 19586ce19affSChao Yu 19596ce19affSChao Yu sbi->compress_percent = COMPRESS_PERCENT; 19606ce19affSChao Yu sbi->compress_watermark = COMPRESS_WATERMARK; 19616ce19affSChao Yu 19626ce19affSChao Yu atomic_set(&sbi->compress_page_hit, 0); 19636ce19affSChao Yu 19646ce19affSChao Yu return 0; 19656ce19affSChao Yu } 19666ce19affSChao Yu 19676ce19affSChao Yu void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) 19686ce19affSChao Yu { 19696ce19affSChao Yu if (!sbi->compress_inode) 19706ce19affSChao Yu return; 19716ce19affSChao Yu iput(sbi->compress_inode); 19726ce19affSChao Yu sbi->compress_inode = NULL; 19736ce19affSChao Yu } 19746ce19affSChao Yu 197531083031SChao Yu int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) 197631083031SChao Yu { 197731083031SChao Yu dev_t dev = sbi->sb->s_bdev->bd_dev; 197831083031SChao Yu char slab_name[32]; 197931083031SChao Yu 198029be7ec3SChao Yu if (!f2fs_sb_has_compression(sbi)) 198129be7ec3SChao Yu return 0; 198229be7ec3SChao Yu 198331083031SChao Yu sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); 198431083031SChao Yu 198531083031SChao Yu sbi->page_array_slab_size = sizeof(struct page *) << 198631083031SChao Yu F2FS_OPTION(sbi).compress_log_size; 198731083031SChao Yu 198831083031SChao Yu sbi->page_array_slab = f2fs_kmem_cache_create(slab_name, 198931083031SChao Yu sbi->page_array_slab_size); 1990870af777SYangtao Li return sbi->page_array_slab ? 0 : -ENOMEM; 199131083031SChao Yu } 199231083031SChao Yu 199331083031SChao Yu void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) 199431083031SChao Yu { 199531083031SChao Yu kmem_cache_destroy(sbi->page_array_slab); 199631083031SChao Yu } 1997c68d6c88SChao Yu 1998870af777SYangtao Li int __init f2fs_init_compress_cache(void) 1999c68d6c88SChao Yu { 2000c68d6c88SChao Yu cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry", 2001c68d6c88SChao Yu sizeof(struct compress_io_ctx)); 2002c68d6c88SChao Yu if (!cic_entry_slab) 2003c68d6c88SChao Yu return -ENOMEM; 2004c68d6c88SChao Yu dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry", 2005c68d6c88SChao Yu sizeof(struct decompress_io_ctx)); 2006c68d6c88SChao Yu if (!dic_entry_slab) 2007c68d6c88SChao Yu goto free_cic; 2008c68d6c88SChao Yu return 0; 2009c68d6c88SChao Yu free_cic: 2010870af777SYangtao Li kmem_cache_destroy(cic_entry_slab); 2011c68d6c88SChao Yu return -ENOMEM; 2012c68d6c88SChao Yu } 2013c68d6c88SChao Yu 2014c68d6c88SChao Yu void f2fs_destroy_compress_cache(void) 2015c68d6c88SChao Yu { 2016870af777SYangtao Li kmem_cache_destroy(dic_entry_slab); 2017870af777SYangtao Li kmem_cache_destroy(cic_entry_slab); 2018c68d6c88SChao Yu } 2019