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author | 2022-07-15 23:41:59 +0800 | |
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committer | 2022-07-21 22:55:22 +0800 | |
commit | 4f05687fd7036473605a161ca47a2cf9fd3cbfc5 (patch) | |
tree | 19a329101325918191be4ea05311819d70821465 /fs/erofs/zdata.c | |
parent | erofs: get rid of `z_pagemap_global' (diff) | |
download | linux-4f05687fd7036473605a161ca47a2cf9fd3cbfc5.tar.gz linux-4f05687fd7036473605a161ca47a2cf9fd3cbfc5.tar.bz2 linux-4f05687fd7036473605a161ca47a2cf9fd3cbfc5.zip |
erofs: introduce struct z_erofs_decompress_backend
Let's introduce struct z_erofs_decompress_backend in order to pass
on the decompression backend context between helper functions more
easier and avoid too many arguments.
Acked-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20220715154203.48093-13-hsiangkao@linux.alibaba.com
Diffstat (limited to 'fs/erofs/zdata.c')
-rw-r--r-- | fs/erofs/zdata.c | 140 |
1 files changed, 75 insertions, 65 deletions
diff --git a/fs/erofs/zdata.c b/fs/erofs/zdata.c index 3f735ca0415e..1cf377ed1452 100644 --- a/fs/erofs/zdata.c +++ b/fs/erofs/zdata.c @@ -847,9 +847,22 @@ static bool z_erofs_page_is_invalidated(struct page *page) return !page->mapping && !z_erofs_is_shortlived_page(page); } -static int z_erofs_parse_out_bvecs(struct z_erofs_pcluster *pcl, - struct page **pages, struct page **pagepool) +struct z_erofs_decompress_backend { + struct page *onstack_pages[Z_EROFS_ONSTACK_PAGES]; + struct super_block *sb; + struct z_erofs_pcluster *pcl; + + /* pages with the longest decompressed length for deduplication */ + struct page **decompressed_pages; + /* pages to keep the compressed data */ + struct page **compressed_pages; + + struct page **pagepool; +}; + +static int z_erofs_parse_out_bvecs(struct z_erofs_decompress_backend *be) { + struct z_erofs_pcluster *pcl = be->pcl; struct z_erofs_bvec_iter biter; struct page *old_bvpage; int i, err = 0; @@ -857,39 +870,39 @@ static int z_erofs_parse_out_bvecs(struct z_erofs_pcluster *pcl, z_erofs_bvec_iter_begin(&biter, &pcl->bvset, Z_EROFS_INLINE_BVECS, 0); for (i = 0; i < pcl->vcnt; ++i) { struct z_erofs_bvec bvec; - unsigned int pagenr; + unsigned int pgnr; z_erofs_bvec_dequeue(&biter, &bvec, &old_bvpage); if (old_bvpage) - z_erofs_put_shortlivedpage(pagepool, old_bvpage); + z_erofs_put_shortlivedpage(be->pagepool, old_bvpage); - pagenr = (bvec.offset + pcl->pageofs_out) >> PAGE_SHIFT; - DBG_BUGON(pagenr >= pcl->nr_pages); + pgnr = (bvec.offset + pcl->pageofs_out) >> PAGE_SHIFT; + DBG_BUGON(pgnr >= pcl->nr_pages); DBG_BUGON(z_erofs_page_is_invalidated(bvec.page)); /* * currently EROFS doesn't support multiref(dedup), * so here erroring out one multiref page. */ - if (pages[pagenr]) { + if (be->decompressed_pages[pgnr]) { DBG_BUGON(1); - z_erofs_page_mark_eio(pages[pagenr]); - z_erofs_onlinepage_endio(pages[pagenr]); + z_erofs_page_mark_eio(be->decompressed_pages[pgnr]); + z_erofs_onlinepage_endio(be->decompressed_pages[pgnr]); err = -EFSCORRUPTED; } - pages[pagenr] = bvec.page; + be->decompressed_pages[pgnr] = bvec.page; } old_bvpage = z_erofs_bvec_iter_end(&biter); if (old_bvpage) - z_erofs_put_shortlivedpage(pagepool, old_bvpage); + z_erofs_put_shortlivedpage(be->pagepool, old_bvpage); return err; } -static struct page **z_erofs_parse_in_bvecs(struct erofs_sb_info *sbi, - struct z_erofs_pcluster *pcl, struct page **pages, - struct page **pagepool, bool *overlapped) +static int z_erofs_parse_in_bvecs(struct z_erofs_decompress_backend *be, + bool *overlapped) { + struct z_erofs_pcluster *pcl = be->pcl; unsigned int pclusterpages = z_erofs_pclusterpages(pcl); struct page **compressed_pages; int i, err = 0; @@ -919,7 +932,7 @@ static struct page **z_erofs_parse_in_bvecs(struct erofs_sb_info *sbi, DBG_BUGON(z_erofs_page_is_invalidated(page)); if (!z_erofs_is_shortlived_page(page)) { - if (erofs_page_is_managed(sbi, page)) { + if (erofs_page_is_managed(EROFS_SB(be->sb), page)) { if (!PageUptodate(page)) err = -EIO; continue; @@ -927,60 +940,58 @@ static struct page **z_erofs_parse_in_bvecs(struct erofs_sb_info *sbi, pgnr = (bvec->offset + pcl->pageofs_out) >> PAGE_SHIFT; DBG_BUGON(pgnr >= pcl->nr_pages); - if (pages[pgnr]) { + if (be->decompressed_pages[pgnr]) { DBG_BUGON(1); - z_erofs_page_mark_eio(pages[pgnr]); - z_erofs_onlinepage_endio(pages[pgnr]); + z_erofs_page_mark_eio( + be->decompressed_pages[pgnr]); + z_erofs_onlinepage_endio( + be->decompressed_pages[pgnr]); err = -EFSCORRUPTED; } - pages[pgnr] = page; + be->decompressed_pages[pgnr] = page; *overlapped = true; } } if (err) { kfree(compressed_pages); - return ERR_PTR(err); + return err; } - return compressed_pages; + be->compressed_pages = compressed_pages; + return 0; } -static int z_erofs_decompress_pcluster(struct super_block *sb, - struct z_erofs_pcluster *pcl, - struct page **pagepool, int err) +static int z_erofs_decompress_pcluster(struct z_erofs_decompress_backend *be, + int err) { - struct erofs_sb_info *const sbi = EROFS_SB(sb); + struct erofs_sb_info *const sbi = EROFS_SB(be->sb); + struct z_erofs_pcluster *pcl = be->pcl; unsigned int pclusterpages = z_erofs_pclusterpages(pcl); unsigned int i, inputsize, outputsize, llen, nr_pages; - struct page *pages_onstack[Z_EROFS_VMAP_ONSTACK_PAGES]; - struct page **pages, **compressed_pages, *page; + struct page *page; int err2; bool overlapped, partial; - might_sleep(); DBG_BUGON(!READ_ONCE(pcl->nr_pages)); - mutex_lock(&pcl->lock); nr_pages = pcl->nr_pages; - if (nr_pages <= Z_EROFS_VMAP_ONSTACK_PAGES) - pages = pages_onstack; - else - pages = kvmalloc_array(nr_pages, sizeof(struct page *), - GFP_KERNEL | __GFP_NOFAIL); - - for (i = 0; i < nr_pages; ++i) - pages[i] = NULL; + if (nr_pages <= Z_EROFS_ONSTACK_PAGES) { + be->decompressed_pages = be->onstack_pages; + memset(be->decompressed_pages, 0, + sizeof(struct page *) * nr_pages); + } else { + be->decompressed_pages = + kvcalloc(nr_pages, sizeof(struct page *), + GFP_KERNEL | __GFP_NOFAIL); + } - err2 = z_erofs_parse_out_bvecs(pcl, pages, pagepool); + err2 = z_erofs_parse_out_bvecs(be); + if (err2) + err = err2; + err2 = z_erofs_parse_in_bvecs(be, &overlapped); if (err2) err = err2; - compressed_pages = z_erofs_parse_in_bvecs(sbi, pcl, pages, - pagepool, &overlapped); - if (IS_ERR(compressed_pages)) { - err = PTR_ERR(compressed_pages); - compressed_pages = NULL; - } if (err) goto out; @@ -1000,9 +1011,9 @@ static int z_erofs_decompress_pcluster(struct super_block *sb, inputsize = pclusterpages * PAGE_SIZE; err = z_erofs_decompress(&(struct z_erofs_decompress_req) { - .sb = sb, - .in = compressed_pages, - .out = pages, + .sb = be->sb, + .in = be->compressed_pages, + .out = be->decompressed_pages, .pageofs_in = pcl->pageofs_in, .pageofs_out = pcl->pageofs_out, .inputsize = inputsize, @@ -1010,7 +1021,7 @@ static int z_erofs_decompress_pcluster(struct super_block *sb, .alg = pcl->algorithmformat, .inplace_io = overlapped, .partial_decoding = partial - }, pagepool); + }, be->pagepool); out: /* must handle all compressed pages before actual file pages */ @@ -1026,29 +1037,29 @@ out: continue; /* recycle all individual short-lived pages */ - (void)z_erofs_put_shortlivedpage(pagepool, page); + (void)z_erofs_put_shortlivedpage(be->pagepool, page); WRITE_ONCE(pcl->compressed_bvecs[i].page, NULL); } } - kfree(compressed_pages); + kfree(be->compressed_pages); for (i = 0; i < nr_pages; ++i) { - page = pages[i]; + page = be->decompressed_pages[i]; if (!page) continue; DBG_BUGON(z_erofs_page_is_invalidated(page)); /* recycle all individual short-lived pages */ - if (z_erofs_put_shortlivedpage(pagepool, page)) + if (z_erofs_put_shortlivedpage(be->pagepool, page)) continue; if (err) z_erofs_page_mark_eio(page); z_erofs_onlinepage_endio(page); } - if (pages != pages_onstack) - kvfree(pages); + if (be->decompressed_pages != be->onstack_pages) + kvfree(be->decompressed_pages); pcl->nr_pages = 0; pcl->bvset.nextpage = NULL; @@ -1063,23 +1074,23 @@ out: static void z_erofs_decompress_queue(const struct z_erofs_decompressqueue *io, struct page **pagepool) { + struct z_erofs_decompress_backend be = { + .sb = io->sb, + .pagepool = pagepool, + }; z_erofs_next_pcluster_t owned = io->head; while (owned != Z_EROFS_PCLUSTER_TAIL_CLOSED) { - struct z_erofs_pcluster *pcl; - - /* no possible that 'owned' equals Z_EROFS_WORK_TPTR_TAIL */ + /* impossible that 'owned' equals Z_EROFS_WORK_TPTR_TAIL */ DBG_BUGON(owned == Z_EROFS_PCLUSTER_TAIL); - - /* no possible that 'owned' equals NULL */ + /* impossible that 'owned' equals Z_EROFS_PCLUSTER_NIL */ DBG_BUGON(owned == Z_EROFS_PCLUSTER_NIL); - pcl = container_of(owned, struct z_erofs_pcluster, next); - owned = READ_ONCE(pcl->next); + be.pcl = container_of(owned, struct z_erofs_pcluster, next); + owned = READ_ONCE(be.pcl->next); - z_erofs_decompress_pcluster(io->sb, pcl, pagepool, - io->eio ? -EIO : 0); - erofs_workgroup_put(&pcl->obj); + z_erofs_decompress_pcluster(&be, io->eio ? -EIO : 0); + erofs_workgroup_put(&be.pcl->obj); } } @@ -1105,7 +1116,6 @@ static void z_erofs_decompress_kickoff(struct z_erofs_decompressqueue *io, if (sync) { if (!atomic_add_return(bios, &io->pending_bios)) complete(&io->u.done); - return; } |