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1977 lines
46 KiB
1977 lines
46 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* f2fs compress support |
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* |
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* Copyright (c) 2019 Chao Yu <[email protected]> |
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*/ |
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|
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#include <linux/fs.h> |
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#include <linux/f2fs_fs.h> |
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#include <linux/writeback.h> |
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#include <linux/backing-dev.h> |
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#include <linux/lzo.h> |
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#include <linux/lz4.h> |
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#include <linux/zstd.h> |
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#include <linux/pagevec.h> |
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#include "f2fs.h" |
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#include "node.h" |
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#include "segment.h" |
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#include <trace/events/f2fs.h> |
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static struct kmem_cache *cic_entry_slab; |
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static struct kmem_cache *dic_entry_slab; |
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static void *page_array_alloc(struct inode *inode, int nr) |
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{ |
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
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unsigned int size = sizeof(struct page *) * nr; |
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if (likely(size <= sbi->page_array_slab_size)) |
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return f2fs_kmem_cache_alloc(sbi->page_array_slab, |
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GFP_F2FS_ZERO, false, F2FS_I_SB(inode)); |
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return f2fs_kzalloc(sbi, size, GFP_NOFS); |
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} |
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static void page_array_free(struct inode *inode, void *pages, int nr) |
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{ |
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
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unsigned int size = sizeof(struct page *) * nr; |
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if (!pages) |
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return; |
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if (likely(size <= sbi->page_array_slab_size)) |
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kmem_cache_free(sbi->page_array_slab, pages); |
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else |
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kfree(pages); |
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} |
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struct f2fs_compress_ops { |
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int (*init_compress_ctx)(struct compress_ctx *cc); |
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void (*destroy_compress_ctx)(struct compress_ctx *cc); |
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int (*compress_pages)(struct compress_ctx *cc); |
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int (*init_decompress_ctx)(struct decompress_io_ctx *dic); |
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void (*destroy_decompress_ctx)(struct decompress_io_ctx *dic); |
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int (*decompress_pages)(struct decompress_io_ctx *dic); |
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}; |
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static unsigned int offset_in_cluster(struct compress_ctx *cc, pgoff_t index) |
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{ |
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return index & (cc->cluster_size - 1); |
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} |
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static pgoff_t cluster_idx(struct compress_ctx *cc, pgoff_t index) |
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{ |
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return index >> cc->log_cluster_size; |
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} |
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static pgoff_t start_idx_of_cluster(struct compress_ctx *cc) |
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{ |
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return cc->cluster_idx << cc->log_cluster_size; |
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} |
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bool f2fs_is_compressed_page(struct page *page) |
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{ |
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if (!PagePrivate(page)) |
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return false; |
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if (!page_private(page)) |
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return false; |
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if (page_private_nonpointer(page)) |
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return false; |
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f2fs_bug_on(F2FS_M_SB(page->mapping), |
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*((u32 *)page_private(page)) != F2FS_COMPRESSED_PAGE_MAGIC); |
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return true; |
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} |
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static void f2fs_set_compressed_page(struct page *page, |
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struct inode *inode, pgoff_t index, void *data) |
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{ |
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attach_page_private(page, (void *)data); |
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|
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/* i_crypto_info and iv index */ |
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page->index = index; |
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page->mapping = inode->i_mapping; |
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} |
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static void f2fs_drop_rpages(struct compress_ctx *cc, int len, bool unlock) |
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{ |
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int i; |
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for (i = 0; i < len; i++) { |
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if (!cc->rpages[i]) |
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continue; |
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if (unlock) |
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unlock_page(cc->rpages[i]); |
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else |
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put_page(cc->rpages[i]); |
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} |
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} |
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static void f2fs_put_rpages(struct compress_ctx *cc) |
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{ |
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f2fs_drop_rpages(cc, cc->cluster_size, false); |
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} |
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static void f2fs_unlock_rpages(struct compress_ctx *cc, int len) |
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{ |
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f2fs_drop_rpages(cc, len, true); |
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} |
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static void f2fs_put_rpages_wbc(struct compress_ctx *cc, |
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struct writeback_control *wbc, bool redirty, int unlock) |
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{ |
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unsigned int i; |
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for (i = 0; i < cc->cluster_size; i++) { |
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if (!cc->rpages[i]) |
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continue; |
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if (redirty) |
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redirty_page_for_writepage(wbc, cc->rpages[i]); |
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f2fs_put_page(cc->rpages[i], unlock); |
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} |
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} |
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struct page *f2fs_compress_control_page(struct page *page) |
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{ |
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return ((struct compress_io_ctx *)page_private(page))->rpages[0]; |
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} |
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int f2fs_init_compress_ctx(struct compress_ctx *cc) |
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{ |
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if (cc->rpages) |
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return 0; |
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cc->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
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return cc->rpages ? 0 : -ENOMEM; |
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} |
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void f2fs_destroy_compress_ctx(struct compress_ctx *cc, bool reuse) |
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{ |
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page_array_free(cc->inode, cc->rpages, cc->cluster_size); |
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cc->rpages = NULL; |
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cc->nr_rpages = 0; |
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cc->nr_cpages = 0; |
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if (!reuse) |
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cc->cluster_idx = NULL_CLUSTER; |
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} |
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void f2fs_compress_ctx_add_page(struct compress_ctx *cc, struct page *page) |
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{ |
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unsigned int cluster_ofs; |
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if (!f2fs_cluster_can_merge_page(cc, page->index)) |
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f2fs_bug_on(F2FS_I_SB(cc->inode), 1); |
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cluster_ofs = offset_in_cluster(cc, page->index); |
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cc->rpages[cluster_ofs] = page; |
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cc->nr_rpages++; |
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cc->cluster_idx = cluster_idx(cc, page->index); |
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} |
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#ifdef CONFIG_F2FS_FS_LZO |
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static int lzo_init_compress_ctx(struct compress_ctx *cc) |
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{ |
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cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), |
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LZO1X_MEM_COMPRESS, GFP_NOFS); |
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if (!cc->private) |
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return -ENOMEM; |
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cc->clen = lzo1x_worst_compress(PAGE_SIZE << cc->log_cluster_size); |
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return 0; |
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} |
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static void lzo_destroy_compress_ctx(struct compress_ctx *cc) |
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{ |
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kvfree(cc->private); |
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cc->private = NULL; |
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} |
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static int lzo_compress_pages(struct compress_ctx *cc) |
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{ |
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int ret; |
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ret = lzo1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, |
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&cc->clen, cc->private); |
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if (ret != LZO_E_OK) { |
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printk_ratelimited("%sF2FS-fs (%s): lzo compress failed, ret:%d\n", |
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KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); |
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return -EIO; |
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} |
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return 0; |
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} |
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static int lzo_decompress_pages(struct decompress_io_ctx *dic) |
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{ |
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int ret; |
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ret = lzo1x_decompress_safe(dic->cbuf->cdata, dic->clen, |
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dic->rbuf, &dic->rlen); |
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if (ret != LZO_E_OK) { |
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printk_ratelimited("%sF2FS-fs (%s): lzo decompress failed, ret:%d\n", |
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KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); |
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return -EIO; |
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} |
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if (dic->rlen != PAGE_SIZE << dic->log_cluster_size) { |
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printk_ratelimited("%sF2FS-fs (%s): lzo invalid rlen:%zu, " |
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"expected:%lu\n", KERN_ERR, |
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F2FS_I_SB(dic->inode)->sb->s_id, |
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dic->rlen, |
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PAGE_SIZE << dic->log_cluster_size); |
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return -EIO; |
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} |
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return 0; |
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} |
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static const struct f2fs_compress_ops f2fs_lzo_ops = { |
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.init_compress_ctx = lzo_init_compress_ctx, |
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.destroy_compress_ctx = lzo_destroy_compress_ctx, |
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.compress_pages = lzo_compress_pages, |
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.decompress_pages = lzo_decompress_pages, |
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}; |
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#endif |
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#ifdef CONFIG_F2FS_FS_LZ4 |
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static int lz4_init_compress_ctx(struct compress_ctx *cc) |
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{ |
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unsigned int size = LZ4_MEM_COMPRESS; |
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#ifdef CONFIG_F2FS_FS_LZ4HC |
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if (F2FS_I(cc->inode)->i_compress_flag >> COMPRESS_LEVEL_OFFSET) |
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size = LZ4HC_MEM_COMPRESS; |
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#endif |
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cc->private = f2fs_kvmalloc(F2FS_I_SB(cc->inode), size, GFP_NOFS); |
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if (!cc->private) |
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return -ENOMEM; |
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/* |
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* we do not change cc->clen to LZ4_compressBound(inputsize) to |
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* adapt worst compress case, because lz4 compressor can handle |
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* output budget properly. |
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*/ |
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cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; |
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return 0; |
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} |
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static void lz4_destroy_compress_ctx(struct compress_ctx *cc) |
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{ |
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kvfree(cc->private); |
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cc->private = NULL; |
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} |
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#ifdef CONFIG_F2FS_FS_LZ4HC |
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static int lz4hc_compress_pages(struct compress_ctx *cc) |
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{ |
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unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> |
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COMPRESS_LEVEL_OFFSET; |
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int len; |
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if (level) |
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len = LZ4_compress_HC(cc->rbuf, cc->cbuf->cdata, cc->rlen, |
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cc->clen, level, cc->private); |
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else |
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len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, |
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cc->clen, cc->private); |
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if (!len) |
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return -EAGAIN; |
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cc->clen = len; |
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return 0; |
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} |
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#endif |
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static int lz4_compress_pages(struct compress_ctx *cc) |
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{ |
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int len; |
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#ifdef CONFIG_F2FS_FS_LZ4HC |
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return lz4hc_compress_pages(cc); |
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#endif |
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len = LZ4_compress_default(cc->rbuf, cc->cbuf->cdata, cc->rlen, |
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cc->clen, cc->private); |
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if (!len) |
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return -EAGAIN; |
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cc->clen = len; |
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return 0; |
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} |
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static int lz4_decompress_pages(struct decompress_io_ctx *dic) |
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{ |
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int ret; |
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ret = LZ4_decompress_safe(dic->cbuf->cdata, dic->rbuf, |
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dic->clen, dic->rlen); |
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if (ret < 0) { |
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printk_ratelimited("%sF2FS-fs (%s): lz4 decompress failed, ret:%d\n", |
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KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, ret); |
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return -EIO; |
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} |
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if (ret != PAGE_SIZE << dic->log_cluster_size) { |
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printk_ratelimited("%sF2FS-fs (%s): lz4 invalid rlen:%zu, " |
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"expected:%lu\n", KERN_ERR, |
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F2FS_I_SB(dic->inode)->sb->s_id, |
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dic->rlen, |
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PAGE_SIZE << dic->log_cluster_size); |
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return -EIO; |
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} |
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return 0; |
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} |
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static const struct f2fs_compress_ops f2fs_lz4_ops = { |
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.init_compress_ctx = lz4_init_compress_ctx, |
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.destroy_compress_ctx = lz4_destroy_compress_ctx, |
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.compress_pages = lz4_compress_pages, |
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.decompress_pages = lz4_decompress_pages, |
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}; |
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#endif |
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#ifdef CONFIG_F2FS_FS_ZSTD |
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#define F2FS_ZSTD_DEFAULT_CLEVEL 1 |
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static int zstd_init_compress_ctx(struct compress_ctx *cc) |
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{ |
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ZSTD_parameters params; |
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ZSTD_CStream *stream; |
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void *workspace; |
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unsigned int workspace_size; |
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unsigned char level = F2FS_I(cc->inode)->i_compress_flag >> |
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COMPRESS_LEVEL_OFFSET; |
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if (!level) |
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level = F2FS_ZSTD_DEFAULT_CLEVEL; |
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params = ZSTD_getParams(level, cc->rlen, 0); |
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workspace_size = ZSTD_CStreamWorkspaceBound(params.cParams); |
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workspace = f2fs_kvmalloc(F2FS_I_SB(cc->inode), |
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workspace_size, GFP_NOFS); |
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if (!workspace) |
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return -ENOMEM; |
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stream = ZSTD_initCStream(params, 0, workspace, workspace_size); |
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if (!stream) { |
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printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_initCStream failed\n", |
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KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
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__func__); |
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kvfree(workspace); |
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return -EIO; |
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} |
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cc->private = workspace; |
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cc->private2 = stream; |
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cc->clen = cc->rlen - PAGE_SIZE - COMPRESS_HEADER_SIZE; |
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return 0; |
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} |
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static void zstd_destroy_compress_ctx(struct compress_ctx *cc) |
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{ |
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kvfree(cc->private); |
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cc->private = NULL; |
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cc->private2 = NULL; |
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} |
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static int zstd_compress_pages(struct compress_ctx *cc) |
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{ |
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ZSTD_CStream *stream = cc->private2; |
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ZSTD_inBuffer inbuf; |
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ZSTD_outBuffer outbuf; |
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int src_size = cc->rlen; |
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int dst_size = src_size - PAGE_SIZE - COMPRESS_HEADER_SIZE; |
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int ret; |
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inbuf.pos = 0; |
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inbuf.src = cc->rbuf; |
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inbuf.size = src_size; |
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outbuf.pos = 0; |
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outbuf.dst = cc->cbuf->cdata; |
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outbuf.size = dst_size; |
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ret = ZSTD_compressStream(stream, &outbuf, &inbuf); |
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if (ZSTD_isError(ret)) { |
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printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_compressStream failed, ret: %d\n", |
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KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
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__func__, ZSTD_getErrorCode(ret)); |
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return -EIO; |
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} |
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ret = ZSTD_endStream(stream, &outbuf); |
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if (ZSTD_isError(ret)) { |
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printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_endStream returned %d\n", |
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KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, |
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__func__, ZSTD_getErrorCode(ret)); |
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return -EIO; |
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} |
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/* |
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* there is compressed data remained in intermediate buffer due to |
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* no more space in cbuf.cdata |
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*/ |
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if (ret) |
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return -EAGAIN; |
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cc->clen = outbuf.pos; |
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return 0; |
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} |
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static int zstd_init_decompress_ctx(struct decompress_io_ctx *dic) |
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{ |
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ZSTD_DStream *stream; |
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void *workspace; |
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unsigned int workspace_size; |
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unsigned int max_window_size = |
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MAX_COMPRESS_WINDOW_SIZE(dic->log_cluster_size); |
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workspace_size = ZSTD_DStreamWorkspaceBound(max_window_size); |
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workspace = f2fs_kvmalloc(F2FS_I_SB(dic->inode), |
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workspace_size, GFP_NOFS); |
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if (!workspace) |
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return -ENOMEM; |
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stream = ZSTD_initDStream(max_window_size, workspace, workspace_size); |
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if (!stream) { |
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printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_initDStream failed\n", |
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KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, |
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__func__); |
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kvfree(workspace); |
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return -EIO; |
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} |
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dic->private = workspace; |
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dic->private2 = stream; |
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return 0; |
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} |
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static void zstd_destroy_decompress_ctx(struct decompress_io_ctx *dic) |
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{ |
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kvfree(dic->private); |
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dic->private = NULL; |
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dic->private2 = NULL; |
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} |
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static int zstd_decompress_pages(struct decompress_io_ctx *dic) |
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{ |
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ZSTD_DStream *stream = dic->private2; |
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ZSTD_inBuffer inbuf; |
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ZSTD_outBuffer outbuf; |
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int ret; |
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inbuf.pos = 0; |
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inbuf.src = dic->cbuf->cdata; |
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inbuf.size = dic->clen; |
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outbuf.pos = 0; |
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outbuf.dst = dic->rbuf; |
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outbuf.size = dic->rlen; |
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ret = ZSTD_decompressStream(stream, &outbuf, &inbuf); |
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if (ZSTD_isError(ret)) { |
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printk_ratelimited("%sF2FS-fs (%s): %s ZSTD_compressStream failed, ret: %d\n", |
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KERN_ERR, F2FS_I_SB(dic->inode)->sb->s_id, |
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__func__, ZSTD_getErrorCode(ret)); |
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return -EIO; |
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} |
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if (dic->rlen != outbuf.pos) { |
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printk_ratelimited("%sF2FS-fs (%s): %s ZSTD invalid rlen:%zu, " |
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"expected:%lu\n", KERN_ERR, |
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F2FS_I_SB(dic->inode)->sb->s_id, |
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__func__, dic->rlen, |
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PAGE_SIZE << dic->log_cluster_size); |
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return -EIO; |
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} |
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return 0; |
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} |
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static const struct f2fs_compress_ops f2fs_zstd_ops = { |
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.init_compress_ctx = zstd_init_compress_ctx, |
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.destroy_compress_ctx = zstd_destroy_compress_ctx, |
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.compress_pages = zstd_compress_pages, |
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.init_decompress_ctx = zstd_init_decompress_ctx, |
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.destroy_decompress_ctx = zstd_destroy_decompress_ctx, |
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.decompress_pages = zstd_decompress_pages, |
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}; |
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#endif |
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|
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#ifdef CONFIG_F2FS_FS_LZO |
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#ifdef CONFIG_F2FS_FS_LZORLE |
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static int lzorle_compress_pages(struct compress_ctx *cc) |
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{ |
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int ret; |
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ret = lzorle1x_1_compress(cc->rbuf, cc->rlen, cc->cbuf->cdata, |
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&cc->clen, cc->private); |
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if (ret != LZO_E_OK) { |
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printk_ratelimited("%sF2FS-fs (%s): lzo-rle compress failed, ret:%d\n", |
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KERN_ERR, F2FS_I_SB(cc->inode)->sb->s_id, ret); |
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return -EIO; |
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} |
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return 0; |
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} |
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static const struct f2fs_compress_ops f2fs_lzorle_ops = { |
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.init_compress_ctx = lzo_init_compress_ctx, |
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.destroy_compress_ctx = lzo_destroy_compress_ctx, |
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.compress_pages = lzorle_compress_pages, |
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.decompress_pages = lzo_decompress_pages, |
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}; |
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#endif |
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#endif |
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|
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static const struct f2fs_compress_ops *f2fs_cops[COMPRESS_MAX] = { |
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#ifdef CONFIG_F2FS_FS_LZO |
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&f2fs_lzo_ops, |
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#else |
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NULL, |
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#endif |
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#ifdef CONFIG_F2FS_FS_LZ4 |
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&f2fs_lz4_ops, |
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#else |
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NULL, |
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#endif |
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#ifdef CONFIG_F2FS_FS_ZSTD |
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&f2fs_zstd_ops, |
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#else |
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NULL, |
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#endif |
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#if defined(CONFIG_F2FS_FS_LZO) && defined(CONFIG_F2FS_FS_LZORLE) |
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&f2fs_lzorle_ops, |
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#else |
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NULL, |
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#endif |
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}; |
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|
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bool f2fs_is_compress_backend_ready(struct inode *inode) |
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{ |
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if (!f2fs_compressed_file(inode)) |
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return true; |
|
return f2fs_cops[F2FS_I(inode)->i_compress_algorithm]; |
|
} |
|
|
|
static mempool_t *compress_page_pool; |
|
static int num_compress_pages = 512; |
|
module_param(num_compress_pages, uint, 0444); |
|
MODULE_PARM_DESC(num_compress_pages, |
|
"Number of intermediate compress pages to preallocate"); |
|
|
|
int f2fs_init_compress_mempool(void) |
|
{ |
|
compress_page_pool = mempool_create_page_pool(num_compress_pages, 0); |
|
if (!compress_page_pool) |
|
return -ENOMEM; |
|
|
|
return 0; |
|
} |
|
|
|
void f2fs_destroy_compress_mempool(void) |
|
{ |
|
mempool_destroy(compress_page_pool); |
|
} |
|
|
|
static struct page *f2fs_compress_alloc_page(void) |
|
{ |
|
struct page *page; |
|
|
|
page = mempool_alloc(compress_page_pool, GFP_NOFS); |
|
lock_page(page); |
|
|
|
return page; |
|
} |
|
|
|
static void f2fs_compress_free_page(struct page *page) |
|
{ |
|
if (!page) |
|
return; |
|
detach_page_private(page); |
|
page->mapping = NULL; |
|
unlock_page(page); |
|
mempool_free(page, compress_page_pool); |
|
} |
|
|
|
#define MAX_VMAP_RETRIES 3 |
|
|
|
static void *f2fs_vmap(struct page **pages, unsigned int count) |
|
{ |
|
int i; |
|
void *buf = NULL; |
|
|
|
for (i = 0; i < MAX_VMAP_RETRIES; i++) { |
|
buf = vm_map_ram(pages, count, -1); |
|
if (buf) |
|
break; |
|
vm_unmap_aliases(); |
|
} |
|
return buf; |
|
} |
|
|
|
static int f2fs_compress_pages(struct compress_ctx *cc) |
|
{ |
|
struct f2fs_inode_info *fi = F2FS_I(cc->inode); |
|
const struct f2fs_compress_ops *cops = |
|
f2fs_cops[fi->i_compress_algorithm]; |
|
unsigned int max_len, new_nr_cpages; |
|
struct page **new_cpages; |
|
u32 chksum = 0; |
|
int i, ret; |
|
|
|
trace_f2fs_compress_pages_start(cc->inode, cc->cluster_idx, |
|
cc->cluster_size, fi->i_compress_algorithm); |
|
|
|
if (cops->init_compress_ctx) { |
|
ret = cops->init_compress_ctx(cc); |
|
if (ret) |
|
goto out; |
|
} |
|
|
|
max_len = COMPRESS_HEADER_SIZE + cc->clen; |
|
cc->nr_cpages = DIV_ROUND_UP(max_len, PAGE_SIZE); |
|
|
|
cc->cpages = page_array_alloc(cc->inode, cc->nr_cpages); |
|
if (!cc->cpages) { |
|
ret = -ENOMEM; |
|
goto destroy_compress_ctx; |
|
} |
|
|
|
for (i = 0; i < cc->nr_cpages; i++) { |
|
cc->cpages[i] = f2fs_compress_alloc_page(); |
|
if (!cc->cpages[i]) { |
|
ret = -ENOMEM; |
|
goto out_free_cpages; |
|
} |
|
} |
|
|
|
cc->rbuf = f2fs_vmap(cc->rpages, cc->cluster_size); |
|
if (!cc->rbuf) { |
|
ret = -ENOMEM; |
|
goto out_free_cpages; |
|
} |
|
|
|
cc->cbuf = f2fs_vmap(cc->cpages, cc->nr_cpages); |
|
if (!cc->cbuf) { |
|
ret = -ENOMEM; |
|
goto out_vunmap_rbuf; |
|
} |
|
|
|
ret = cops->compress_pages(cc); |
|
if (ret) |
|
goto out_vunmap_cbuf; |
|
|
|
max_len = PAGE_SIZE * (cc->cluster_size - 1) - COMPRESS_HEADER_SIZE; |
|
|
|
if (cc->clen > max_len) { |
|
ret = -EAGAIN; |
|
goto out_vunmap_cbuf; |
|
} |
|
|
|
cc->cbuf->clen = cpu_to_le32(cc->clen); |
|
|
|
if (fi->i_compress_flag & 1 << COMPRESS_CHKSUM) |
|
chksum = f2fs_crc32(F2FS_I_SB(cc->inode), |
|
cc->cbuf->cdata, cc->clen); |
|
cc->cbuf->chksum = cpu_to_le32(chksum); |
|
|
|
for (i = 0; i < COMPRESS_DATA_RESERVED_SIZE; i++) |
|
cc->cbuf->reserved[i] = cpu_to_le32(0); |
|
|
|
new_nr_cpages = DIV_ROUND_UP(cc->clen + COMPRESS_HEADER_SIZE, PAGE_SIZE); |
|
|
|
/* Now we're going to cut unnecessary tail pages */ |
|
new_cpages = page_array_alloc(cc->inode, new_nr_cpages); |
|
if (!new_cpages) { |
|
ret = -ENOMEM; |
|
goto out_vunmap_cbuf; |
|
} |
|
|
|
/* zero out any unused part of the last page */ |
|
memset(&cc->cbuf->cdata[cc->clen], 0, |
|
(new_nr_cpages * PAGE_SIZE) - |
|
(cc->clen + COMPRESS_HEADER_SIZE)); |
|
|
|
vm_unmap_ram(cc->cbuf, cc->nr_cpages); |
|
vm_unmap_ram(cc->rbuf, cc->cluster_size); |
|
|
|
for (i = 0; i < cc->nr_cpages; i++) { |
|
if (i < new_nr_cpages) { |
|
new_cpages[i] = cc->cpages[i]; |
|
continue; |
|
} |
|
f2fs_compress_free_page(cc->cpages[i]); |
|
cc->cpages[i] = NULL; |
|
} |
|
|
|
if (cops->destroy_compress_ctx) |
|
cops->destroy_compress_ctx(cc); |
|
|
|
page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
|
cc->cpages = new_cpages; |
|
cc->nr_cpages = new_nr_cpages; |
|
|
|
trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, |
|
cc->clen, ret); |
|
return 0; |
|
|
|
out_vunmap_cbuf: |
|
vm_unmap_ram(cc->cbuf, cc->nr_cpages); |
|
out_vunmap_rbuf: |
|
vm_unmap_ram(cc->rbuf, cc->cluster_size); |
|
out_free_cpages: |
|
for (i = 0; i < cc->nr_cpages; i++) { |
|
if (cc->cpages[i]) |
|
f2fs_compress_free_page(cc->cpages[i]); |
|
} |
|
page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
|
cc->cpages = NULL; |
|
destroy_compress_ctx: |
|
if (cops->destroy_compress_ctx) |
|
cops->destroy_compress_ctx(cc); |
|
out: |
|
trace_f2fs_compress_pages_end(cc->inode, cc->cluster_idx, |
|
cc->clen, ret); |
|
return ret; |
|
} |
|
|
|
void f2fs_decompress_cluster(struct decompress_io_ctx *dic) |
|
{ |
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); |
|
struct f2fs_inode_info *fi = F2FS_I(dic->inode); |
|
const struct f2fs_compress_ops *cops = |
|
f2fs_cops[fi->i_compress_algorithm]; |
|
int ret; |
|
int i; |
|
|
|
trace_f2fs_decompress_pages_start(dic->inode, dic->cluster_idx, |
|
dic->cluster_size, fi->i_compress_algorithm); |
|
|
|
if (dic->failed) { |
|
ret = -EIO; |
|
goto out_end_io; |
|
} |
|
|
|
dic->tpages = page_array_alloc(dic->inode, dic->cluster_size); |
|
if (!dic->tpages) { |
|
ret = -ENOMEM; |
|
goto out_end_io; |
|
} |
|
|
|
for (i = 0; i < dic->cluster_size; i++) { |
|
if (dic->rpages[i]) { |
|
dic->tpages[i] = dic->rpages[i]; |
|
continue; |
|
} |
|
|
|
dic->tpages[i] = f2fs_compress_alloc_page(); |
|
if (!dic->tpages[i]) { |
|
ret = -ENOMEM; |
|
goto out_end_io; |
|
} |
|
} |
|
|
|
if (cops->init_decompress_ctx) { |
|
ret = cops->init_decompress_ctx(dic); |
|
if (ret) |
|
goto out_end_io; |
|
} |
|
|
|
dic->rbuf = f2fs_vmap(dic->tpages, dic->cluster_size); |
|
if (!dic->rbuf) { |
|
ret = -ENOMEM; |
|
goto out_destroy_decompress_ctx; |
|
} |
|
|
|
dic->cbuf = f2fs_vmap(dic->cpages, dic->nr_cpages); |
|
if (!dic->cbuf) { |
|
ret = -ENOMEM; |
|
goto out_vunmap_rbuf; |
|
} |
|
|
|
dic->clen = le32_to_cpu(dic->cbuf->clen); |
|
dic->rlen = PAGE_SIZE << dic->log_cluster_size; |
|
|
|
if (dic->clen > PAGE_SIZE * dic->nr_cpages - COMPRESS_HEADER_SIZE) { |
|
ret = -EFSCORRUPTED; |
|
goto out_vunmap_cbuf; |
|
} |
|
|
|
ret = cops->decompress_pages(dic); |
|
|
|
if (!ret && (fi->i_compress_flag & 1 << COMPRESS_CHKSUM)) { |
|
u32 provided = le32_to_cpu(dic->cbuf->chksum); |
|
u32 calculated = f2fs_crc32(sbi, dic->cbuf->cdata, dic->clen); |
|
|
|
if (provided != calculated) { |
|
if (!is_inode_flag_set(dic->inode, FI_COMPRESS_CORRUPT)) { |
|
set_inode_flag(dic->inode, FI_COMPRESS_CORRUPT); |
|
printk_ratelimited( |
|
"%sF2FS-fs (%s): checksum invalid, nid = %lu, %x vs %x", |
|
KERN_INFO, sbi->sb->s_id, dic->inode->i_ino, |
|
provided, calculated); |
|
} |
|
set_sbi_flag(sbi, SBI_NEED_FSCK); |
|
} |
|
} |
|
|
|
out_vunmap_cbuf: |
|
vm_unmap_ram(dic->cbuf, dic->nr_cpages); |
|
out_vunmap_rbuf: |
|
vm_unmap_ram(dic->rbuf, dic->cluster_size); |
|
out_destroy_decompress_ctx: |
|
if (cops->destroy_decompress_ctx) |
|
cops->destroy_decompress_ctx(dic); |
|
out_end_io: |
|
trace_f2fs_decompress_pages_end(dic->inode, dic->cluster_idx, |
|
dic->clen, ret); |
|
f2fs_decompress_end_io(dic, ret); |
|
} |
|
|
|
/* |
|
* This is called when a page of a compressed cluster has been read from disk |
|
* (or failed to be read from disk). It checks whether this page was the last |
|
* page being waited on in the cluster, and if so, it decompresses the cluster |
|
* (or in the case of a failure, cleans up without actually decompressing). |
|
*/ |
|
void f2fs_end_read_compressed_page(struct page *page, bool failed, |
|
block_t blkaddr) |
|
{ |
|
struct decompress_io_ctx *dic = |
|
(struct decompress_io_ctx *)page_private(page); |
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dic->inode); |
|
|
|
dec_page_count(sbi, F2FS_RD_DATA); |
|
|
|
if (failed) |
|
WRITE_ONCE(dic->failed, true); |
|
else if (blkaddr) |
|
f2fs_cache_compressed_page(sbi, page, |
|
dic->inode->i_ino, blkaddr); |
|
|
|
if (atomic_dec_and_test(&dic->remaining_pages)) |
|
f2fs_decompress_cluster(dic); |
|
} |
|
|
|
static bool is_page_in_cluster(struct compress_ctx *cc, pgoff_t index) |
|
{ |
|
if (cc->cluster_idx == NULL_CLUSTER) |
|
return true; |
|
return cc->cluster_idx == cluster_idx(cc, index); |
|
} |
|
|
|
bool f2fs_cluster_is_empty(struct compress_ctx *cc) |
|
{ |
|
return cc->nr_rpages == 0; |
|
} |
|
|
|
static bool f2fs_cluster_is_full(struct compress_ctx *cc) |
|
{ |
|
return cc->cluster_size == cc->nr_rpages; |
|
} |
|
|
|
bool f2fs_cluster_can_merge_page(struct compress_ctx *cc, pgoff_t index) |
|
{ |
|
if (f2fs_cluster_is_empty(cc)) |
|
return true; |
|
return is_page_in_cluster(cc, index); |
|
} |
|
|
|
static bool cluster_has_invalid_data(struct compress_ctx *cc) |
|
{ |
|
loff_t i_size = i_size_read(cc->inode); |
|
unsigned nr_pages = DIV_ROUND_UP(i_size, PAGE_SIZE); |
|
int i; |
|
|
|
for (i = 0; i < cc->cluster_size; i++) { |
|
struct page *page = cc->rpages[i]; |
|
|
|
f2fs_bug_on(F2FS_I_SB(cc->inode), !page); |
|
|
|
/* beyond EOF */ |
|
if (page->index >= nr_pages) |
|
return true; |
|
} |
|
return false; |
|
} |
|
|
|
bool f2fs_sanity_check_cluster(struct dnode_of_data *dn) |
|
{ |
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
|
unsigned int cluster_size = F2FS_I(dn->inode)->i_cluster_size; |
|
bool compressed = dn->data_blkaddr == COMPRESS_ADDR; |
|
int cluster_end = 0; |
|
int i; |
|
char *reason = ""; |
|
|
|
if (!compressed) |
|
return false; |
|
|
|
/* [..., COMPR_ADDR, ...] */ |
|
if (dn->ofs_in_node % cluster_size) { |
|
reason = "[*|C|*|*]"; |
|
goto out; |
|
} |
|
|
|
for (i = 1; i < cluster_size; i++) { |
|
block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, |
|
dn->ofs_in_node + i); |
|
|
|
/* [COMPR_ADDR, ..., COMPR_ADDR] */ |
|
if (blkaddr == COMPRESS_ADDR) { |
|
reason = "[C|*|C|*]"; |
|
goto out; |
|
} |
|
if (compressed) { |
|
if (!__is_valid_data_blkaddr(blkaddr)) { |
|
if (!cluster_end) |
|
cluster_end = i; |
|
continue; |
|
} |
|
/* [COMPR_ADDR, NULL_ADDR or NEW_ADDR, valid_blkaddr] */ |
|
if (cluster_end) { |
|
reason = "[C|N|N|V]"; |
|
goto out; |
|
} |
|
} |
|
} |
|
return false; |
|
out: |
|
f2fs_warn(sbi, "access invalid cluster, ino:%lu, nid:%u, ofs_in_node:%u, reason:%s", |
|
dn->inode->i_ino, dn->nid, dn->ofs_in_node, reason); |
|
set_sbi_flag(sbi, SBI_NEED_FSCK); |
|
return true; |
|
} |
|
|
|
static int __f2fs_cluster_blocks(struct inode *inode, |
|
unsigned int cluster_idx, bool compr) |
|
{ |
|
struct dnode_of_data dn; |
|
unsigned int cluster_size = F2FS_I(inode)->i_cluster_size; |
|
unsigned int start_idx = cluster_idx << |
|
F2FS_I(inode)->i_log_cluster_size; |
|
int ret; |
|
|
|
set_new_dnode(&dn, inode, NULL, NULL, 0); |
|
ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); |
|
if (ret) { |
|
if (ret == -ENOENT) |
|
ret = 0; |
|
goto fail; |
|
} |
|
|
|
if (f2fs_sanity_check_cluster(&dn)) { |
|
ret = -EFSCORRUPTED; |
|
goto fail; |
|
} |
|
|
|
if (dn.data_blkaddr == COMPRESS_ADDR) { |
|
int i; |
|
|
|
ret = 1; |
|
for (i = 1; i < cluster_size; i++) { |
|
block_t blkaddr; |
|
|
|
blkaddr = data_blkaddr(dn.inode, |
|
dn.node_page, dn.ofs_in_node + i); |
|
if (compr) { |
|
if (__is_valid_data_blkaddr(blkaddr)) |
|
ret++; |
|
} else { |
|
if (blkaddr != NULL_ADDR) |
|
ret++; |
|
} |
|
} |
|
|
|
f2fs_bug_on(F2FS_I_SB(inode), |
|
!compr && ret != cluster_size && |
|
!is_inode_flag_set(inode, FI_COMPRESS_RELEASED)); |
|
} |
|
fail: |
|
f2fs_put_dnode(&dn); |
|
return ret; |
|
} |
|
|
|
/* return # of compressed blocks in compressed cluster */ |
|
static int f2fs_compressed_blocks(struct compress_ctx *cc) |
|
{ |
|
return __f2fs_cluster_blocks(cc->inode, cc->cluster_idx, true); |
|
} |
|
|
|
/* return # of valid blocks in compressed cluster */ |
|
int f2fs_is_compressed_cluster(struct inode *inode, pgoff_t index) |
|
{ |
|
return __f2fs_cluster_blocks(inode, |
|
index >> F2FS_I(inode)->i_log_cluster_size, |
|
false); |
|
} |
|
|
|
static bool cluster_may_compress(struct compress_ctx *cc) |
|
{ |
|
if (!f2fs_need_compress_data(cc->inode)) |
|
return false; |
|
if (f2fs_is_atomic_file(cc->inode)) |
|
return false; |
|
if (!f2fs_cluster_is_full(cc)) |
|
return false; |
|
if (unlikely(f2fs_cp_error(F2FS_I_SB(cc->inode)))) |
|
return false; |
|
return !cluster_has_invalid_data(cc); |
|
} |
|
|
|
static void set_cluster_writeback(struct compress_ctx *cc) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < cc->cluster_size; i++) { |
|
if (cc->rpages[i]) |
|
set_page_writeback(cc->rpages[i]); |
|
} |
|
} |
|
|
|
static void set_cluster_dirty(struct compress_ctx *cc) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < cc->cluster_size; i++) |
|
if (cc->rpages[i]) |
|
set_page_dirty(cc->rpages[i]); |
|
} |
|
|
|
static int prepare_compress_overwrite(struct compress_ctx *cc, |
|
struct page **pagep, pgoff_t index, void **fsdata) |
|
{ |
|
struct f2fs_sb_info *sbi = F2FS_I_SB(cc->inode); |
|
struct address_space *mapping = cc->inode->i_mapping; |
|
struct page *page; |
|
sector_t last_block_in_bio; |
|
unsigned fgp_flag = FGP_LOCK | FGP_WRITE | FGP_CREAT; |
|
pgoff_t start_idx = start_idx_of_cluster(cc); |
|
int i, ret; |
|
|
|
retry: |
|
ret = f2fs_is_compressed_cluster(cc->inode, start_idx); |
|
if (ret <= 0) |
|
return ret; |
|
|
|
ret = f2fs_init_compress_ctx(cc); |
|
if (ret) |
|
return ret; |
|
|
|
/* keep page reference to avoid page reclaim */ |
|
for (i = 0; i < cc->cluster_size; i++) { |
|
page = f2fs_pagecache_get_page(mapping, start_idx + i, |
|
fgp_flag, GFP_NOFS); |
|
if (!page) { |
|
ret = -ENOMEM; |
|
goto unlock_pages; |
|
} |
|
|
|
if (PageUptodate(page)) |
|
f2fs_put_page(page, 1); |
|
else |
|
f2fs_compress_ctx_add_page(cc, page); |
|
} |
|
|
|
if (!f2fs_cluster_is_empty(cc)) { |
|
struct bio *bio = NULL; |
|
|
|
ret = f2fs_read_multi_pages(cc, &bio, cc->cluster_size, |
|
&last_block_in_bio, false, true); |
|
f2fs_put_rpages(cc); |
|
f2fs_destroy_compress_ctx(cc, true); |
|
if (ret) |
|
goto out; |
|
if (bio) |
|
f2fs_submit_bio(sbi, bio, DATA); |
|
|
|
ret = f2fs_init_compress_ctx(cc); |
|
if (ret) |
|
goto out; |
|
} |
|
|
|
for (i = 0; i < cc->cluster_size; i++) { |
|
f2fs_bug_on(sbi, cc->rpages[i]); |
|
|
|
page = find_lock_page(mapping, start_idx + i); |
|
if (!page) { |
|
/* page can be truncated */ |
|
goto release_and_retry; |
|
} |
|
|
|
f2fs_wait_on_page_writeback(page, DATA, true, true); |
|
f2fs_compress_ctx_add_page(cc, page); |
|
|
|
if (!PageUptodate(page)) { |
|
release_and_retry: |
|
f2fs_put_rpages(cc); |
|
f2fs_unlock_rpages(cc, i + 1); |
|
f2fs_destroy_compress_ctx(cc, true); |
|
goto retry; |
|
} |
|
} |
|
|
|
if (likely(!ret)) { |
|
*fsdata = cc->rpages; |
|
*pagep = cc->rpages[offset_in_cluster(cc, index)]; |
|
return cc->cluster_size; |
|
} |
|
|
|
unlock_pages: |
|
f2fs_put_rpages(cc); |
|
f2fs_unlock_rpages(cc, i); |
|
f2fs_destroy_compress_ctx(cc, true); |
|
out: |
|
return ret; |
|
} |
|
|
|
int f2fs_prepare_compress_overwrite(struct inode *inode, |
|
struct page **pagep, pgoff_t index, void **fsdata) |
|
{ |
|
struct compress_ctx cc = { |
|
.inode = inode, |
|
.log_cluster_size = F2FS_I(inode)->i_log_cluster_size, |
|
.cluster_size = F2FS_I(inode)->i_cluster_size, |
|
.cluster_idx = index >> F2FS_I(inode)->i_log_cluster_size, |
|
.rpages = NULL, |
|
.nr_rpages = 0, |
|
}; |
|
|
|
return prepare_compress_overwrite(&cc, pagep, index, fsdata); |
|
} |
|
|
|
bool f2fs_compress_write_end(struct inode *inode, void *fsdata, |
|
pgoff_t index, unsigned copied) |
|
|
|
{ |
|
struct compress_ctx cc = { |
|
.inode = inode, |
|
.log_cluster_size = F2FS_I(inode)->i_log_cluster_size, |
|
.cluster_size = F2FS_I(inode)->i_cluster_size, |
|
.rpages = fsdata, |
|
}; |
|
bool first_index = (index == cc.rpages[0]->index); |
|
|
|
if (copied) |
|
set_cluster_dirty(&cc); |
|
|
|
f2fs_put_rpages_wbc(&cc, NULL, false, 1); |
|
f2fs_destroy_compress_ctx(&cc, false); |
|
|
|
return first_index; |
|
} |
|
|
|
int f2fs_truncate_partial_cluster(struct inode *inode, u64 from, bool lock) |
|
{ |
|
void *fsdata = NULL; |
|
struct page *pagep; |
|
int log_cluster_size = F2FS_I(inode)->i_log_cluster_size; |
|
pgoff_t start_idx = from >> (PAGE_SHIFT + log_cluster_size) << |
|
log_cluster_size; |
|
int err; |
|
|
|
err = f2fs_is_compressed_cluster(inode, start_idx); |
|
if (err < 0) |
|
return err; |
|
|
|
/* truncate normal cluster */ |
|
if (!err) |
|
return f2fs_do_truncate_blocks(inode, from, lock); |
|
|
|
/* truncate compressed cluster */ |
|
err = f2fs_prepare_compress_overwrite(inode, &pagep, |
|
start_idx, &fsdata); |
|
|
|
/* should not be a normal cluster */ |
|
f2fs_bug_on(F2FS_I_SB(inode), err == 0); |
|
|
|
if (err <= 0) |
|
return err; |
|
|
|
if (err > 0) { |
|
struct page **rpages = fsdata; |
|
int cluster_size = F2FS_I(inode)->i_cluster_size; |
|
int i; |
|
|
|
for (i = cluster_size - 1; i >= 0; i--) { |
|
loff_t start = rpages[i]->index << PAGE_SHIFT; |
|
|
|
if (from <= start) { |
|
zero_user_segment(rpages[i], 0, PAGE_SIZE); |
|
} else { |
|
zero_user_segment(rpages[i], from - start, |
|
PAGE_SIZE); |
|
break; |
|
} |
|
} |
|
|
|
f2fs_compress_write_end(inode, fsdata, start_idx, true); |
|
} |
|
return 0; |
|
} |
|
|
|
static int f2fs_write_compressed_pages(struct compress_ctx *cc, |
|
int *submitted, |
|
struct writeback_control *wbc, |
|
enum iostat_type io_type) |
|
{ |
|
struct inode *inode = cc->inode; |
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
|
struct f2fs_inode_info *fi = F2FS_I(inode); |
|
struct f2fs_io_info fio = { |
|
.sbi = sbi, |
|
.ino = cc->inode->i_ino, |
|
.type = DATA, |
|
.op = REQ_OP_WRITE, |
|
.op_flags = wbc_to_write_flags(wbc), |
|
.old_blkaddr = NEW_ADDR, |
|
.page = NULL, |
|
.encrypted_page = NULL, |
|
.compressed_page = NULL, |
|
.submitted = false, |
|
.io_type = io_type, |
|
.io_wbc = wbc, |
|
.encrypted = fscrypt_inode_uses_fs_layer_crypto(cc->inode), |
|
}; |
|
struct dnode_of_data dn; |
|
struct node_info ni; |
|
struct compress_io_ctx *cic; |
|
pgoff_t start_idx = start_idx_of_cluster(cc); |
|
unsigned int last_index = cc->cluster_size - 1; |
|
loff_t psize; |
|
int i, err; |
|
|
|
/* we should bypass data pages to proceed the kworkder jobs */ |
|
if (unlikely(f2fs_cp_error(sbi))) { |
|
mapping_set_error(cc->rpages[0]->mapping, -EIO); |
|
goto out_free; |
|
} |
|
|
|
if (IS_NOQUOTA(inode)) { |
|
/* |
|
* We need to wait for node_write to avoid block allocation during |
|
* checkpoint. This can only happen to quota writes which can cause |
|
* the below discard race condition. |
|
*/ |
|
down_read(&sbi->node_write); |
|
} else if (!f2fs_trylock_op(sbi)) { |
|
goto out_free; |
|
} |
|
|
|
set_new_dnode(&dn, cc->inode, NULL, NULL, 0); |
|
|
|
err = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE); |
|
if (err) |
|
goto out_unlock_op; |
|
|
|
for (i = 0; i < cc->cluster_size; i++) { |
|
if (data_blkaddr(dn.inode, dn.node_page, |
|
dn.ofs_in_node + i) == NULL_ADDR) |
|
goto out_put_dnode; |
|
} |
|
|
|
psize = (loff_t)(cc->rpages[last_index]->index + 1) << PAGE_SHIFT; |
|
|
|
err = f2fs_get_node_info(fio.sbi, dn.nid, &ni); |
|
if (err) |
|
goto out_put_dnode; |
|
|
|
fio.version = ni.version; |
|
|
|
cic = f2fs_kmem_cache_alloc(cic_entry_slab, GFP_F2FS_ZERO, false, sbi); |
|
if (!cic) |
|
goto out_put_dnode; |
|
|
|
cic->magic = F2FS_COMPRESSED_PAGE_MAGIC; |
|
cic->inode = inode; |
|
atomic_set(&cic->pending_pages, cc->nr_cpages); |
|
cic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
|
if (!cic->rpages) |
|
goto out_put_cic; |
|
|
|
cic->nr_rpages = cc->cluster_size; |
|
|
|
for (i = 0; i < cc->nr_cpages; i++) { |
|
f2fs_set_compressed_page(cc->cpages[i], inode, |
|
cc->rpages[i + 1]->index, cic); |
|
fio.compressed_page = cc->cpages[i]; |
|
|
|
fio.old_blkaddr = data_blkaddr(dn.inode, dn.node_page, |
|
dn.ofs_in_node + i + 1); |
|
|
|
/* wait for GCed page writeback via META_MAPPING */ |
|
f2fs_wait_on_block_writeback(inode, fio.old_blkaddr); |
|
|
|
if (fio.encrypted) { |
|
fio.page = cc->rpages[i + 1]; |
|
err = f2fs_encrypt_one_page(&fio); |
|
if (err) |
|
goto out_destroy_crypt; |
|
cc->cpages[i] = fio.encrypted_page; |
|
} |
|
} |
|
|
|
set_cluster_writeback(cc); |
|
|
|
for (i = 0; i < cc->cluster_size; i++) |
|
cic->rpages[i] = cc->rpages[i]; |
|
|
|
for (i = 0; i < cc->cluster_size; i++, dn.ofs_in_node++) { |
|
block_t blkaddr; |
|
|
|
blkaddr = f2fs_data_blkaddr(&dn); |
|
fio.page = cc->rpages[i]; |
|
fio.old_blkaddr = blkaddr; |
|
|
|
/* cluster header */ |
|
if (i == 0) { |
|
if (blkaddr == COMPRESS_ADDR) |
|
fio.compr_blocks++; |
|
if (__is_valid_data_blkaddr(blkaddr)) |
|
f2fs_invalidate_blocks(sbi, blkaddr); |
|
f2fs_update_data_blkaddr(&dn, COMPRESS_ADDR); |
|
goto unlock_continue; |
|
} |
|
|
|
if (fio.compr_blocks && __is_valid_data_blkaddr(blkaddr)) |
|
fio.compr_blocks++; |
|
|
|
if (i > cc->nr_cpages) { |
|
if (__is_valid_data_blkaddr(blkaddr)) { |
|
f2fs_invalidate_blocks(sbi, blkaddr); |
|
f2fs_update_data_blkaddr(&dn, NEW_ADDR); |
|
} |
|
goto unlock_continue; |
|
} |
|
|
|
f2fs_bug_on(fio.sbi, blkaddr == NULL_ADDR); |
|
|
|
if (fio.encrypted) |
|
fio.encrypted_page = cc->cpages[i - 1]; |
|
else |
|
fio.compressed_page = cc->cpages[i - 1]; |
|
|
|
cc->cpages[i - 1] = NULL; |
|
f2fs_outplace_write_data(&dn, &fio); |
|
(*submitted)++; |
|
unlock_continue: |
|
inode_dec_dirty_pages(cc->inode); |
|
unlock_page(fio.page); |
|
} |
|
|
|
if (fio.compr_blocks) |
|
f2fs_i_compr_blocks_update(inode, fio.compr_blocks - 1, false); |
|
f2fs_i_compr_blocks_update(inode, cc->nr_cpages, true); |
|
add_compr_block_stat(inode, cc->nr_cpages); |
|
|
|
set_inode_flag(cc->inode, FI_APPEND_WRITE); |
|
if (cc->cluster_idx == 0) |
|
set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
|
|
|
f2fs_put_dnode(&dn); |
|
if (IS_NOQUOTA(inode)) |
|
up_read(&sbi->node_write); |
|
else |
|
f2fs_unlock_op(sbi); |
|
|
|
spin_lock(&fi->i_size_lock); |
|
if (fi->last_disk_size < psize) |
|
fi->last_disk_size = psize; |
|
spin_unlock(&fi->i_size_lock); |
|
|
|
f2fs_put_rpages(cc); |
|
page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
|
cc->cpages = NULL; |
|
f2fs_destroy_compress_ctx(cc, false); |
|
return 0; |
|
|
|
out_destroy_crypt: |
|
page_array_free(cc->inode, cic->rpages, cc->cluster_size); |
|
|
|
for (--i; i >= 0; i--) |
|
fscrypt_finalize_bounce_page(&cc->cpages[i]); |
|
out_put_cic: |
|
kmem_cache_free(cic_entry_slab, cic); |
|
out_put_dnode: |
|
f2fs_put_dnode(&dn); |
|
out_unlock_op: |
|
if (IS_NOQUOTA(inode)) |
|
up_read(&sbi->node_write); |
|
else |
|
f2fs_unlock_op(sbi); |
|
out_free: |
|
for (i = 0; i < cc->nr_cpages; i++) { |
|
if (!cc->cpages[i]) |
|
continue; |
|
f2fs_compress_free_page(cc->cpages[i]); |
|
cc->cpages[i] = NULL; |
|
} |
|
page_array_free(cc->inode, cc->cpages, cc->nr_cpages); |
|
cc->cpages = NULL; |
|
return -EAGAIN; |
|
} |
|
|
|
void f2fs_compress_write_end_io(struct bio *bio, struct page *page) |
|
{ |
|
struct f2fs_sb_info *sbi = bio->bi_private; |
|
struct compress_io_ctx *cic = |
|
(struct compress_io_ctx *)page_private(page); |
|
int i; |
|
|
|
if (unlikely(bio->bi_status)) |
|
mapping_set_error(cic->inode->i_mapping, -EIO); |
|
|
|
f2fs_compress_free_page(page); |
|
|
|
dec_page_count(sbi, F2FS_WB_DATA); |
|
|
|
if (atomic_dec_return(&cic->pending_pages)) |
|
return; |
|
|
|
for (i = 0; i < cic->nr_rpages; i++) { |
|
WARN_ON(!cic->rpages[i]); |
|
clear_page_private_gcing(cic->rpages[i]); |
|
end_page_writeback(cic->rpages[i]); |
|
} |
|
|
|
page_array_free(cic->inode, cic->rpages, cic->nr_rpages); |
|
kmem_cache_free(cic_entry_slab, cic); |
|
} |
|
|
|
static int f2fs_write_raw_pages(struct compress_ctx *cc, |
|
int *submitted, |
|
struct writeback_control *wbc, |
|
enum iostat_type io_type) |
|
{ |
|
struct address_space *mapping = cc->inode->i_mapping; |
|
int _submitted, compr_blocks, ret; |
|
int i = -1, err = 0; |
|
|
|
compr_blocks = f2fs_compressed_blocks(cc); |
|
if (compr_blocks < 0) { |
|
err = compr_blocks; |
|
goto out_err; |
|
} |
|
|
|
for (i = 0; i < cc->cluster_size; i++) { |
|
if (!cc->rpages[i]) |
|
continue; |
|
retry_write: |
|
if (cc->rpages[i]->mapping != mapping) { |
|
unlock_page(cc->rpages[i]); |
|
continue; |
|
} |
|
|
|
BUG_ON(!PageLocked(cc->rpages[i])); |
|
|
|
ret = f2fs_write_single_data_page(cc->rpages[i], &_submitted, |
|
NULL, NULL, wbc, io_type, |
|
compr_blocks, false); |
|
if (ret) { |
|
if (ret == AOP_WRITEPAGE_ACTIVATE) { |
|
unlock_page(cc->rpages[i]); |
|
ret = 0; |
|
} else if (ret == -EAGAIN) { |
|
/* |
|
* for quota file, just redirty left pages to |
|
* avoid deadlock caused by cluster update race |
|
* from foreground operation. |
|
*/ |
|
if (IS_NOQUOTA(cc->inode)) { |
|
err = 0; |
|
goto out_err; |
|
} |
|
ret = 0; |
|
cond_resched(); |
|
congestion_wait(BLK_RW_ASYNC, |
|
DEFAULT_IO_TIMEOUT); |
|
lock_page(cc->rpages[i]); |
|
|
|
if (!PageDirty(cc->rpages[i])) { |
|
unlock_page(cc->rpages[i]); |
|
continue; |
|
} |
|
|
|
clear_page_dirty_for_io(cc->rpages[i]); |
|
goto retry_write; |
|
} |
|
err = ret; |
|
goto out_err; |
|
} |
|
|
|
*submitted += _submitted; |
|
} |
|
|
|
f2fs_balance_fs(F2FS_M_SB(mapping), true); |
|
|
|
return 0; |
|
out_err: |
|
for (++i; i < cc->cluster_size; i++) { |
|
if (!cc->rpages[i]) |
|
continue; |
|
redirty_page_for_writepage(wbc, cc->rpages[i]); |
|
unlock_page(cc->rpages[i]); |
|
} |
|
return err; |
|
} |
|
|
|
int f2fs_write_multi_pages(struct compress_ctx *cc, |
|
int *submitted, |
|
struct writeback_control *wbc, |
|
enum iostat_type io_type) |
|
{ |
|
int err; |
|
|
|
*submitted = 0; |
|
if (cluster_may_compress(cc)) { |
|
err = f2fs_compress_pages(cc); |
|
if (err == -EAGAIN) { |
|
goto write; |
|
} else if (err) { |
|
f2fs_put_rpages_wbc(cc, wbc, true, 1); |
|
goto destroy_out; |
|
} |
|
|
|
err = f2fs_write_compressed_pages(cc, submitted, |
|
wbc, io_type); |
|
if (!err) |
|
return 0; |
|
f2fs_bug_on(F2FS_I_SB(cc->inode), err != -EAGAIN); |
|
} |
|
write: |
|
f2fs_bug_on(F2FS_I_SB(cc->inode), *submitted); |
|
|
|
err = f2fs_write_raw_pages(cc, submitted, wbc, io_type); |
|
f2fs_put_rpages_wbc(cc, wbc, false, 0); |
|
destroy_out: |
|
f2fs_destroy_compress_ctx(cc, false); |
|
return err; |
|
} |
|
|
|
static void f2fs_free_dic(struct decompress_io_ctx *dic); |
|
|
|
struct decompress_io_ctx *f2fs_alloc_dic(struct compress_ctx *cc) |
|
{ |
|
struct decompress_io_ctx *dic; |
|
pgoff_t start_idx = start_idx_of_cluster(cc); |
|
int i; |
|
|
|
dic = f2fs_kmem_cache_alloc(dic_entry_slab, GFP_F2FS_ZERO, |
|
false, F2FS_I_SB(cc->inode)); |
|
if (!dic) |
|
return ERR_PTR(-ENOMEM); |
|
|
|
dic->rpages = page_array_alloc(cc->inode, cc->cluster_size); |
|
if (!dic->rpages) { |
|
kmem_cache_free(dic_entry_slab, dic); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
dic->magic = F2FS_COMPRESSED_PAGE_MAGIC; |
|
dic->inode = cc->inode; |
|
atomic_set(&dic->remaining_pages, cc->nr_cpages); |
|
dic->cluster_idx = cc->cluster_idx; |
|
dic->cluster_size = cc->cluster_size; |
|
dic->log_cluster_size = cc->log_cluster_size; |
|
dic->nr_cpages = cc->nr_cpages; |
|
refcount_set(&dic->refcnt, 1); |
|
dic->failed = false; |
|
dic->need_verity = f2fs_need_verity(cc->inode, start_idx); |
|
|
|
for (i = 0; i < dic->cluster_size; i++) |
|
dic->rpages[i] = cc->rpages[i]; |
|
dic->nr_rpages = cc->cluster_size; |
|
|
|
dic->cpages = page_array_alloc(dic->inode, dic->nr_cpages); |
|
if (!dic->cpages) |
|
goto out_free; |
|
|
|
for (i = 0; i < dic->nr_cpages; i++) { |
|
struct page *page; |
|
|
|
page = f2fs_compress_alloc_page(); |
|
if (!page) |
|
goto out_free; |
|
|
|
f2fs_set_compressed_page(page, cc->inode, |
|
start_idx + i + 1, dic); |
|
dic->cpages[i] = page; |
|
} |
|
|
|
return dic; |
|
|
|
out_free: |
|
f2fs_free_dic(dic); |
|
return ERR_PTR(-ENOMEM); |
|
} |
|
|
|
static void f2fs_free_dic(struct decompress_io_ctx *dic) |
|
{ |
|
int i; |
|
|
|
if (dic->tpages) { |
|
for (i = 0; i < dic->cluster_size; i++) { |
|
if (dic->rpages[i]) |
|
continue; |
|
if (!dic->tpages[i]) |
|
continue; |
|
f2fs_compress_free_page(dic->tpages[i]); |
|
} |
|
page_array_free(dic->inode, dic->tpages, dic->cluster_size); |
|
} |
|
|
|
if (dic->cpages) { |
|
for (i = 0; i < dic->nr_cpages; i++) { |
|
if (!dic->cpages[i]) |
|
continue; |
|
f2fs_compress_free_page(dic->cpages[i]); |
|
} |
|
page_array_free(dic->inode, dic->cpages, dic->nr_cpages); |
|
} |
|
|
|
page_array_free(dic->inode, dic->rpages, dic->nr_rpages); |
|
kmem_cache_free(dic_entry_slab, dic); |
|
} |
|
|
|
static void f2fs_put_dic(struct decompress_io_ctx *dic) |
|
{ |
|
if (refcount_dec_and_test(&dic->refcnt)) |
|
f2fs_free_dic(dic); |
|
} |
|
|
|
/* |
|
* Update and unlock the cluster's pagecache pages, and release the reference to |
|
* the decompress_io_ctx that was being held for I/O completion. |
|
*/ |
|
static void __f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) |
|
{ |
|
int i; |
|
|
|
for (i = 0; i < dic->cluster_size; i++) { |
|
struct page *rpage = dic->rpages[i]; |
|
|
|
if (!rpage) |
|
continue; |
|
|
|
/* PG_error was set if verity failed. */ |
|
if (failed || PageError(rpage)) { |
|
ClearPageUptodate(rpage); |
|
/* will re-read again later */ |
|
ClearPageError(rpage); |
|
} else { |
|
SetPageUptodate(rpage); |
|
} |
|
unlock_page(rpage); |
|
} |
|
|
|
f2fs_put_dic(dic); |
|
} |
|
|
|
static void f2fs_verify_cluster(struct work_struct *work) |
|
{ |
|
struct decompress_io_ctx *dic = |
|
container_of(work, struct decompress_io_ctx, verity_work); |
|
int i; |
|
|
|
/* Verify the cluster's decompressed pages with fs-verity. */ |
|
for (i = 0; i < dic->cluster_size; i++) { |
|
struct page *rpage = dic->rpages[i]; |
|
|
|
if (rpage && !fsverity_verify_page(rpage)) |
|
SetPageError(rpage); |
|
} |
|
|
|
__f2fs_decompress_end_io(dic, false); |
|
} |
|
|
|
/* |
|
* This is called when a compressed cluster has been decompressed |
|
* (or failed to be read and/or decompressed). |
|
*/ |
|
void f2fs_decompress_end_io(struct decompress_io_ctx *dic, bool failed) |
|
{ |
|
if (!failed && dic->need_verity) { |
|
/* |
|
* Note that to avoid deadlocks, the verity work can't be done |
|
* on the decompression workqueue. This is because verifying |
|
* the data pages can involve reading metadata pages from the |
|
* file, and these metadata pages may be compressed. |
|
*/ |
|
INIT_WORK(&dic->verity_work, f2fs_verify_cluster); |
|
fsverity_enqueue_verify_work(&dic->verity_work); |
|
} else { |
|
__f2fs_decompress_end_io(dic, failed); |
|
} |
|
} |
|
|
|
/* |
|
* Put a reference to a compressed page's decompress_io_ctx. |
|
* |
|
* This is called when the page is no longer needed and can be freed. |
|
*/ |
|
void f2fs_put_page_dic(struct page *page) |
|
{ |
|
struct decompress_io_ctx *dic = |
|
(struct decompress_io_ctx *)page_private(page); |
|
|
|
f2fs_put_dic(dic); |
|
} |
|
|
|
/* |
|
* check whether cluster blocks are contiguous, and add extent cache entry |
|
* only if cluster blocks are logically and physically contiguous. |
|
*/ |
|
unsigned int f2fs_cluster_blocks_are_contiguous(struct dnode_of_data *dn) |
|
{ |
|
bool compressed = f2fs_data_blkaddr(dn) == COMPRESS_ADDR; |
|
int i = compressed ? 1 : 0; |
|
block_t first_blkaddr = data_blkaddr(dn->inode, dn->node_page, |
|
dn->ofs_in_node + i); |
|
|
|
for (i += 1; i < F2FS_I(dn->inode)->i_cluster_size; i++) { |
|
block_t blkaddr = data_blkaddr(dn->inode, dn->node_page, |
|
dn->ofs_in_node + i); |
|
|
|
if (!__is_valid_data_blkaddr(blkaddr)) |
|
break; |
|
if (first_blkaddr + i - (compressed ? 1 : 0) != blkaddr) |
|
return 0; |
|
} |
|
|
|
return compressed ? i - 1 : i; |
|
} |
|
|
|
const struct address_space_operations f2fs_compress_aops = { |
|
.releasepage = f2fs_release_page, |
|
.invalidatepage = f2fs_invalidate_page, |
|
}; |
|
|
|
struct address_space *COMPRESS_MAPPING(struct f2fs_sb_info *sbi) |
|
{ |
|
return sbi->compress_inode->i_mapping; |
|
} |
|
|
|
void f2fs_invalidate_compress_page(struct f2fs_sb_info *sbi, block_t blkaddr) |
|
{ |
|
if (!sbi->compress_inode) |
|
return; |
|
invalidate_mapping_pages(COMPRESS_MAPPING(sbi), blkaddr, blkaddr); |
|
} |
|
|
|
void f2fs_cache_compressed_page(struct f2fs_sb_info *sbi, struct page *page, |
|
nid_t ino, block_t blkaddr) |
|
{ |
|
struct page *cpage; |
|
int ret; |
|
|
|
if (!test_opt(sbi, COMPRESS_CACHE)) |
|
return; |
|
|
|
if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) |
|
return; |
|
|
|
if (!f2fs_available_free_memory(sbi, COMPRESS_PAGE)) |
|
return; |
|
|
|
cpage = find_get_page(COMPRESS_MAPPING(sbi), blkaddr); |
|
if (cpage) { |
|
f2fs_put_page(cpage, 0); |
|
return; |
|
} |
|
|
|
cpage = alloc_page(__GFP_NOWARN | __GFP_IO); |
|
if (!cpage) |
|
return; |
|
|
|
ret = add_to_page_cache_lru(cpage, COMPRESS_MAPPING(sbi), |
|
blkaddr, GFP_NOFS); |
|
if (ret) { |
|
f2fs_put_page(cpage, 0); |
|
return; |
|
} |
|
|
|
set_page_private_data(cpage, ino); |
|
|
|
if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE_READ)) |
|
goto out; |
|
|
|
memcpy(page_address(cpage), page_address(page), PAGE_SIZE); |
|
SetPageUptodate(cpage); |
|
out: |
|
f2fs_put_page(cpage, 1); |
|
} |
|
|
|
bool f2fs_load_compressed_page(struct f2fs_sb_info *sbi, struct page *page, |
|
block_t blkaddr) |
|
{ |
|
struct page *cpage; |
|
bool hitted = false; |
|
|
|
if (!test_opt(sbi, COMPRESS_CACHE)) |
|
return false; |
|
|
|
cpage = f2fs_pagecache_get_page(COMPRESS_MAPPING(sbi), |
|
blkaddr, FGP_LOCK | FGP_NOWAIT, GFP_NOFS); |
|
if (cpage) { |
|
if (PageUptodate(cpage)) { |
|
atomic_inc(&sbi->compress_page_hit); |
|
memcpy(page_address(page), |
|
page_address(cpage), PAGE_SIZE); |
|
hitted = true; |
|
} |
|
f2fs_put_page(cpage, 1); |
|
} |
|
|
|
return hitted; |
|
} |
|
|
|
void f2fs_invalidate_compress_pages(struct f2fs_sb_info *sbi, nid_t ino) |
|
{ |
|
struct address_space *mapping = sbi->compress_inode->i_mapping; |
|
struct pagevec pvec; |
|
pgoff_t index = 0; |
|
pgoff_t end = MAX_BLKADDR(sbi); |
|
|
|
if (!mapping->nrpages) |
|
return; |
|
|
|
pagevec_init(&pvec); |
|
|
|
do { |
|
unsigned int nr_pages; |
|
int i; |
|
|
|
nr_pages = pagevec_lookup_range(&pvec, mapping, |
|
&index, end - 1); |
|
if (!nr_pages) |
|
break; |
|
|
|
for (i = 0; i < nr_pages; i++) { |
|
struct page *page = pvec.pages[i]; |
|
|
|
if (page->index > end) |
|
break; |
|
|
|
lock_page(page); |
|
if (page->mapping != mapping) { |
|
unlock_page(page); |
|
continue; |
|
} |
|
|
|
if (ino != get_page_private_data(page)) { |
|
unlock_page(page); |
|
continue; |
|
} |
|
|
|
generic_error_remove_page(mapping, page); |
|
unlock_page(page); |
|
} |
|
pagevec_release(&pvec); |
|
cond_resched(); |
|
} while (index < end); |
|
} |
|
|
|
int f2fs_init_compress_inode(struct f2fs_sb_info *sbi) |
|
{ |
|
struct inode *inode; |
|
|
|
if (!test_opt(sbi, COMPRESS_CACHE)) |
|
return 0; |
|
|
|
inode = f2fs_iget(sbi->sb, F2FS_COMPRESS_INO(sbi)); |
|
if (IS_ERR(inode)) |
|
return PTR_ERR(inode); |
|
sbi->compress_inode = inode; |
|
|
|
sbi->compress_percent = COMPRESS_PERCENT; |
|
sbi->compress_watermark = COMPRESS_WATERMARK; |
|
|
|
atomic_set(&sbi->compress_page_hit, 0); |
|
|
|
return 0; |
|
} |
|
|
|
void f2fs_destroy_compress_inode(struct f2fs_sb_info *sbi) |
|
{ |
|
if (!sbi->compress_inode) |
|
return; |
|
iput(sbi->compress_inode); |
|
sbi->compress_inode = NULL; |
|
} |
|
|
|
int f2fs_init_page_array_cache(struct f2fs_sb_info *sbi) |
|
{ |
|
dev_t dev = sbi->sb->s_bdev->bd_dev; |
|
char slab_name[32]; |
|
|
|
sprintf(slab_name, "f2fs_page_array_entry-%u:%u", MAJOR(dev), MINOR(dev)); |
|
|
|
sbi->page_array_slab_size = sizeof(struct page *) << |
|
F2FS_OPTION(sbi).compress_log_size; |
|
|
|
sbi->page_array_slab = f2fs_kmem_cache_create(slab_name, |
|
sbi->page_array_slab_size); |
|
if (!sbi->page_array_slab) |
|
return -ENOMEM; |
|
return 0; |
|
} |
|
|
|
void f2fs_destroy_page_array_cache(struct f2fs_sb_info *sbi) |
|
{ |
|
kmem_cache_destroy(sbi->page_array_slab); |
|
} |
|
|
|
static int __init f2fs_init_cic_cache(void) |
|
{ |
|
cic_entry_slab = f2fs_kmem_cache_create("f2fs_cic_entry", |
|
sizeof(struct compress_io_ctx)); |
|
if (!cic_entry_slab) |
|
return -ENOMEM; |
|
return 0; |
|
} |
|
|
|
static void f2fs_destroy_cic_cache(void) |
|
{ |
|
kmem_cache_destroy(cic_entry_slab); |
|
} |
|
|
|
static int __init f2fs_init_dic_cache(void) |
|
{ |
|
dic_entry_slab = f2fs_kmem_cache_create("f2fs_dic_entry", |
|
sizeof(struct decompress_io_ctx)); |
|
if (!dic_entry_slab) |
|
return -ENOMEM; |
|
return 0; |
|
} |
|
|
|
static void f2fs_destroy_dic_cache(void) |
|
{ |
|
kmem_cache_destroy(dic_entry_slab); |
|
} |
|
|
|
int __init f2fs_init_compress_cache(void) |
|
{ |
|
int err; |
|
|
|
err = f2fs_init_cic_cache(); |
|
if (err) |
|
goto out; |
|
err = f2fs_init_dic_cache(); |
|
if (err) |
|
goto free_cic; |
|
return 0; |
|
free_cic: |
|
f2fs_destroy_cic_cache(); |
|
out: |
|
return -ENOMEM; |
|
} |
|
|
|
void f2fs_destroy_compress_cache(void) |
|
{ |
|
f2fs_destroy_dic_cache(); |
|
f2fs_destroy_cic_cache(); |
|
}
|
|
|