From d0b2f91bede3bd5e3d24dd6803e56eee959c1797 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Thu, 20 Oct 2016 00:10:27 -0300 Subject: Linux-libre 4.8.2-gnu --- drivers/block/zram/zram_drv.c | 79 ++++++++++++++++++++++++------------------- 1 file changed, 45 insertions(+), 34 deletions(-) (limited to 'drivers/block/zram/zram_drv.c') diff --git a/drivers/block/zram/zram_drv.c b/drivers/block/zram/zram_drv.c index 8fcad8b76..04365b17e 100644 --- a/drivers/block/zram/zram_drv.c +++ b/drivers/block/zram/zram_drv.c @@ -342,9 +342,16 @@ static ssize_t comp_algorithm_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t len) { struct zram *zram = dev_to_zram(dev); + char compressor[CRYPTO_MAX_ALG_NAME]; size_t sz; - if (!zcomp_available_algorithm(buf)) + strlcpy(compressor, buf, sizeof(compressor)); + /* ignore trailing newline */ + sz = strlen(compressor); + if (sz > 0 && compressor[sz - 1] == '\n') + compressor[sz - 1] = 0x00; + + if (!zcomp_available_algorithm(compressor)) return -EINVAL; down_write(&zram->init_lock); @@ -353,13 +360,8 @@ static ssize_t comp_algorithm_store(struct device *dev, pr_info("Can't change algorithm for initialized device\n"); return -EBUSY; } - strlcpy(zram->compressor, buf, sizeof(zram->compressor)); - - /* ignore trailing newline */ - sz = strlen(zram->compressor); - if (sz > 0 && zram->compressor[sz - 1] == '\n') - zram->compressor[sz - 1] = 0x00; + strlcpy(zram->compressor, compressor, sizeof(compressor)); up_write(&zram->init_lock); return len; } @@ -563,7 +565,7 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index) unsigned char *cmem; struct zram_meta *meta = zram->meta; unsigned long handle; - size_t size; + unsigned int size; bit_spin_lock(ZRAM_ACCESS, &meta->table[index].value); handle = meta->table[index].handle; @@ -576,10 +578,14 @@ static int zram_decompress_page(struct zram *zram, char *mem, u32 index) } cmem = zs_map_object(meta->mem_pool, handle, ZS_MM_RO); - if (size == PAGE_SIZE) + if (size == PAGE_SIZE) { copy_page(mem, cmem); - else - ret = zcomp_decompress(zram->comp, cmem, size, mem); + } else { + struct zcomp_strm *zstrm = zcomp_stream_get(zram->comp); + + ret = zcomp_decompress(zstrm, cmem, size, mem); + zcomp_stream_put(zram->comp); + } zs_unmap_object(meta->mem_pool, handle); bit_spin_unlock(ZRAM_ACCESS, &meta->table[index].value); @@ -646,7 +652,7 @@ static int zram_bvec_write(struct zram *zram, struct bio_vec *bvec, u32 index, int offset) { int ret = 0; - size_t clen; + unsigned int clen; unsigned long handle = 0; struct page *page; unsigned char *user_mem, *cmem, *src, *uncmem = NULL; @@ -695,8 +701,8 @@ compress_again: goto out; } - zstrm = zcomp_strm_find(zram->comp); - ret = zcomp_compress(zram->comp, zstrm, uncmem, &clen); + zstrm = zcomp_stream_get(zram->comp); + ret = zcomp_compress(zstrm, uncmem, &clen); if (!is_partial_io(bvec)) { kunmap_atomic(user_mem); user_mem = NULL; @@ -732,19 +738,21 @@ compress_again: handle = zs_malloc(meta->mem_pool, clen, __GFP_KSWAPD_RECLAIM | __GFP_NOWARN | - __GFP_HIGHMEM); + __GFP_HIGHMEM | + __GFP_MOVABLE); if (!handle) { - zcomp_strm_release(zram->comp, zstrm); + zcomp_stream_put(zram->comp); zstrm = NULL; atomic64_inc(&zram->stats.writestall); handle = zs_malloc(meta->mem_pool, clen, - GFP_NOIO | __GFP_HIGHMEM); + GFP_NOIO | __GFP_HIGHMEM | + __GFP_MOVABLE); if (handle) goto compress_again; - pr_err("Error allocating memory for compressed page: %u, size=%zu\n", + pr_err("Error allocating memory for compressed page: %u, size=%u\n", index, clen); ret = -ENOMEM; goto out; @@ -769,7 +777,7 @@ compress_again: memcpy(cmem, src, clen); } - zcomp_strm_release(zram->comp, zstrm); + zcomp_stream_put(zram->comp); zstrm = NULL; zs_unmap_object(meta->mem_pool, handle); @@ -789,7 +797,7 @@ compress_again: atomic64_inc(&zram->stats.pages_stored); out: if (zstrm) - zcomp_strm_release(zram->comp, zstrm); + zcomp_stream_put(zram->comp); if (is_partial_io(bvec)) kfree(uncmem); return ret; @@ -835,15 +843,16 @@ static void zram_bio_discard(struct zram *zram, u32 index, } static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index, - int offset, int rw) + int offset, bool is_write) { unsigned long start_time = jiffies; + int rw_acct = is_write ? REQ_OP_WRITE : REQ_OP_READ; int ret; - generic_start_io_acct(rw, bvec->bv_len >> SECTOR_SHIFT, + generic_start_io_acct(rw_acct, bvec->bv_len >> SECTOR_SHIFT, &zram->disk->part0); - if (rw == READ) { + if (!is_write) { atomic64_inc(&zram->stats.num_reads); ret = zram_bvec_read(zram, bvec, index, offset); } else { @@ -851,10 +860,10 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index, ret = zram_bvec_write(zram, bvec, index, offset); } - generic_end_io_acct(rw, &zram->disk->part0, start_time); + generic_end_io_acct(rw_acct, &zram->disk->part0, start_time); if (unlikely(ret)) { - if (rw == READ) + if (!is_write) atomic64_inc(&zram->stats.failed_reads); else atomic64_inc(&zram->stats.failed_writes); @@ -865,7 +874,7 @@ static int zram_bvec_rw(struct zram *zram, struct bio_vec *bvec, u32 index, static void __zram_make_request(struct zram *zram, struct bio *bio) { - int offset, rw; + int offset; u32 index; struct bio_vec bvec; struct bvec_iter iter; @@ -874,13 +883,12 @@ static void __zram_make_request(struct zram *zram, struct bio *bio) offset = (bio->bi_iter.bi_sector & (SECTORS_PER_PAGE - 1)) << SECTOR_SHIFT; - if (unlikely(bio->bi_rw & REQ_DISCARD)) { + if (unlikely(bio_op(bio) == REQ_OP_DISCARD)) { zram_bio_discard(zram, index, offset, bio); bio_endio(bio); return; } - rw = bio_data_dir(bio); bio_for_each_segment(bvec, bio, iter) { int max_transfer_size = PAGE_SIZE - offset; @@ -895,15 +903,18 @@ static void __zram_make_request(struct zram *zram, struct bio *bio) bv.bv_len = max_transfer_size; bv.bv_offset = bvec.bv_offset; - if (zram_bvec_rw(zram, &bv, index, offset, rw) < 0) + if (zram_bvec_rw(zram, &bv, index, offset, + op_is_write(bio_op(bio))) < 0) goto out; bv.bv_len = bvec.bv_len - max_transfer_size; bv.bv_offset += max_transfer_size; - if (zram_bvec_rw(zram, &bv, index + 1, 0, rw) < 0) + if (zram_bvec_rw(zram, &bv, index + 1, 0, + op_is_write(bio_op(bio))) < 0) goto out; } else - if (zram_bvec_rw(zram, &bvec, index, offset, rw) < 0) + if (zram_bvec_rw(zram, &bvec, index, offset, + op_is_write(bio_op(bio))) < 0) goto out; update_position(&index, &offset, &bvec); @@ -960,7 +971,7 @@ static void zram_slot_free_notify(struct block_device *bdev, } static int zram_rw_page(struct block_device *bdev, sector_t sector, - struct page *page, int rw) + struct page *page, bool is_write) { int offset, err = -EIO; u32 index; @@ -984,7 +995,7 @@ static int zram_rw_page(struct block_device *bdev, sector_t sector, bv.bv_len = PAGE_SIZE; bv.bv_offset = 0; - err = zram_bvec_rw(zram, &bv, index, offset, rw); + err = zram_bvec_rw(zram, &bv, index, offset, is_write); put_zram: zram_meta_put(zram); out: @@ -997,7 +1008,7 @@ out: * (e.g., SetPageError, set_page_dirty and extra works). */ if (err == 0) - page_endio(page, rw, 0); + page_endio(page, is_write, 0); return err; } -- cgit v1.2.3-54-g00ecf