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Thu, 4 Nov 2021 06:49:27 +0000 Received: from dev.nvidia.com (172.20.187.6) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1497.18; Thu, 4 Nov 2021 06:49:25 +0000 From: Chaitanya Kulkarni To: , , , , , , , CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Chaitanya Kulkarni Subject: [RFC PATCH 7/8] null_blk: add REQ_OP_VERIFY support Date: Wed, 3 Nov 2021 23:46:33 -0700 Message-ID: <20211104064634.4481-8-chaitanyak@nvidia.com> X-Mailer: git-send-email 2.29.0 In-Reply-To: <20211104064634.4481-1-chaitanyak@nvidia.com> References: <20211104064634.4481-1-chaitanyak@nvidia.com> MIME-Version: 1.0 X-Originating-IP: [172.20.187.6] X-ClientProxiedBy: HQMAIL111.nvidia.com (172.20.187.18) To HQMAIL107.nvidia.com (172.20.187.13) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 4c88335d-44df-4ab6-fdb0-08d99f5f3ed1 X-MS-TrafficTypeDiagnostic: BL0PR12MB4929: X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:4125; 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X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Nov 2021 06:49:27.3205 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 4c88335d-44df-4ab6-fdb0-08d99f5f3ed1 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a;Ip=[216.228.112.34];Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: CO1NAM11FT054.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BL0PR12MB4929 Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org From: Chaitanya Kulkarni Add a new module parameter, configfs attribute to configure handling of the REQ_OP_VERIFY. This is needed for testing newly added REQ_OP_VERIFY block layer operation. Signed-off-by: Chaitanya Kulkarni --- drivers/block/null_blk/main.c | 25 ++++++++++++++++++++++++- drivers/block/null_blk/null_blk.h | 1 + 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index d6c821d48090..36a5f5343cee 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -216,6 +216,10 @@ static unsigned int g_zone_nr_conv; module_param_named(zone_nr_conv, g_zone_nr_conv, uint, 0444); MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones when block device is zoned. Default: 0"); +static bool g_verify; +module_param_named(verify, g_verify, bool, 0444); +MODULE_PARM_DESC(verify, "Allow REQ_OP_VERIFY processing. Default: false"); + static unsigned int g_zone_max_open; module_param_named(zone_max_open, g_zone_max_open, uint, 0444); MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones when block device is zoned. Default: 0 (no limit)"); @@ -358,6 +362,7 @@ NULLB_DEVICE_ATTR(blocking, bool, NULL); NULLB_DEVICE_ATTR(use_per_node_hctx, bool, NULL); NULLB_DEVICE_ATTR(memory_backed, bool, NULL); NULLB_DEVICE_ATTR(discard, bool, NULL); +NULLB_DEVICE_ATTR(verify, bool, NULL); NULLB_DEVICE_ATTR(mbps, uint, NULL); NULLB_DEVICE_ATTR(cache_size, ulong, NULL); NULLB_DEVICE_ATTR(zoned, bool, NULL); @@ -477,6 +482,7 @@ static struct configfs_attribute *nullb_device_attrs[] = { &nullb_device_attr_power, &nullb_device_attr_memory_backed, &nullb_device_attr_discard, + &nullb_device_attr_verify, &nullb_device_attr_mbps, &nullb_device_attr_cache_size, &nullb_device_attr_badblocks, @@ -539,7 +545,7 @@ nullb_group_drop_item(struct config_group *group, struct config_item *item) static ssize_t memb_group_features_show(struct config_item *item, char *page) { return snprintf(page, PAGE_SIZE, - "memory_backed,discard,bandwidth,cache,badblocks,zoned,zone_size,zone_capacity,zone_nr_conv,zone_max_open,zone_max_active,blocksize,max_sectors\n"); + "memory_backed,discard,verify,bandwidth,cache,badblocks,zoned,zone_size,zone_capacity,zone_nr_conv,zone_max_open,zone_max_active,blocksize,max_sectors\n"); } CONFIGFS_ATTR_RO(memb_group_, features); @@ -601,6 +607,7 @@ static struct nullb_device *null_alloc_dev(void) dev->use_per_node_hctx = g_use_per_node_hctx; dev->zoned = g_zoned; dev->zone_size = g_zone_size; + dev->verify = g_verify; dev->zone_capacity = g_zone_capacity; dev->zone_nr_conv = g_zone_nr_conv; dev->zone_max_open = g_zone_max_open; @@ -1165,6 +1172,9 @@ static int null_handle_rq(struct nullb_cmd *cmd) struct req_iterator iter; struct bio_vec bvec; + if (req_op(rq) == REQ_OP_VERIFY) + return 0; + spin_lock_irq(&nullb->lock); rq_for_each_segment(bvec, rq, iter) { len = bvec.bv_len; @@ -1192,6 +1202,9 @@ static int null_handle_bio(struct nullb_cmd *cmd) struct bio_vec bvec; struct bvec_iter iter; + if (bio_op(bio) == REQ_OP_VERIFY) + return 0; + spin_lock_irq(&nullb->lock); bio_for_each_segment(bvec, bio, iter) { len = bvec.bv_len; @@ -1609,6 +1622,15 @@ static void null_config_discard(struct nullb *nullb) blk_queue_flag_set(QUEUE_FLAG_DISCARD, nullb->q); } +static void null_config_verify(struct nullb *nullb) +{ + if (nullb->dev->verify == false) + return; + + blk_queue_max_verify_sectors(nullb->q, UINT_MAX >> 9); + blk_queue_flag_set(QUEUE_FLAG_VERIFY, nullb->q); +} + static const struct block_device_operations null_bio_ops = { .owner = THIS_MODULE, .submit_bio = null_submit_bio, @@ -1881,6 +1903,7 @@ static int null_add_dev(struct nullb_device *dev) blk_queue_max_hw_sectors(nullb->q, dev->max_sectors); null_config_discard(nullb); + null_config_verify(nullb); sprintf(nullb->disk_name, "nullb%d", nullb->index); diff --git a/drivers/block/null_blk/null_blk.h b/drivers/block/null_blk/null_blk.h index 83504f3cc9d6..e6913c099e71 100644 --- a/drivers/block/null_blk/null_blk.h +++ b/drivers/block/null_blk/null_blk.h @@ -95,6 +95,7 @@ struct nullb_device { bool power; /* power on/off the device */ bool memory_backed; /* if data is stored in memory */ bool discard; /* if support discard */ + bool verify; /* if support verify */ bool zoned; /* if device is zoned */ };