diff options
Diffstat (limited to 'drivers/block/null_blk.c')
| -rw-r--r-- | drivers/block/null_blk.c | 48 |
1 files changed, 46 insertions, 2 deletions
diff --git a/drivers/block/null_blk.c b/drivers/block/null_blk.c index 47dd08499145..86cafa6d3b41 100644 --- a/drivers/block/null_blk.c +++ b/drivers/block/null_blk.c @@ -180,6 +180,14 @@ static bool g_use_per_node_hctx; module_param_named(use_per_node_hctx, g_use_per_node_hctx, bool, 0444); MODULE_PARM_DESC(use_per_node_hctx, "Use per-node allocation for hardware context queues. Default: false"); +static bool g_zoned; +module_param_named(zoned, g_zoned, bool, S_IRUGO); +MODULE_PARM_DESC(zoned, "Make device as a host-managed zoned block device. Default: false"); + +static unsigned long g_zone_size = 256; +module_param_named(zone_size, g_zone_size, ulong, S_IRUGO); +MODULE_PARM_DESC(zone_size, "Zone size in MB when block device is zoned. Must be power-of-two: Default: 256"); + static struct nullb_device *null_alloc_dev(void); static void null_free_dev(struct nullb_device *dev); static void null_del_dev(struct nullb *nullb); @@ -283,6 +291,8 @@ NULLB_DEVICE_ATTR(memory_backed, bool); NULLB_DEVICE_ATTR(discard, bool); NULLB_DEVICE_ATTR(mbps, uint); NULLB_DEVICE_ATTR(cache_size, ulong); +NULLB_DEVICE_ATTR(zoned, bool); +NULLB_DEVICE_ATTR(zone_size, ulong); static ssize_t nullb_device_power_show(struct config_item *item, char *page) { @@ -395,6 +405,8 @@ static struct configfs_attribute *nullb_device_attrs[] = { &nullb_device_attr_mbps, &nullb_device_attr_cache_size, &nullb_device_attr_badblocks, + &nullb_device_attr_zoned, + &nullb_device_attr_zone_size, NULL, }; @@ -447,7 +459,7 @@ 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\n"); + return snprintf(page, PAGE_SIZE, "memory_backed,discard,bandwidth,cache,badblocks,zoned,zone_size\n"); } CONFIGFS_ATTR_RO(memb_group_, features); @@ -506,6 +518,8 @@ static struct nullb_device *null_alloc_dev(void) dev->hw_queue_depth = g_hw_queue_depth; dev->blocking = g_blocking; dev->use_per_node_hctx = g_use_per_node_hctx; + dev->zoned = g_zoned; + dev->zone_size = g_zone_size; return dev; } @@ -514,6 +528,7 @@ static void null_free_dev(struct nullb_device *dev) if (!dev) return; + null_zone_exit(dev); badblocks_exit(&dev->badblocks); kfree(dev); } @@ -1146,6 +1161,11 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd) struct nullb *nullb = dev->nullb; int err = 0; + if (req_op(cmd->rq) == REQ_OP_ZONE_REPORT) { + cmd->error = null_zone_report(nullb, cmd); + goto out; + } + if (test_bit(NULLB_DEV_FL_THROTTLED, &dev->flags)) { struct request *rq = cmd->rq; @@ -1210,6 +1230,13 @@ static blk_status_t null_handle_cmd(struct nullb_cmd *cmd) } } cmd->error = errno_to_blk_status(err); + + if (!cmd->error && dev->zoned) { + if (req_op(cmd->rq) == REQ_OP_WRITE) + null_zone_write(cmd); + else if (req_op(cmd->rq) == REQ_OP_ZONE_RESET) + null_zone_reset(cmd); + } out: /* Complete IO by inline, softirq or timer */ switch (dev->irqmode) { @@ -1737,6 +1764,15 @@ static int null_add_dev(struct nullb_device *dev) blk_queue_flush_queueable(nullb->q, true); } + if (dev->zoned) { + rv = null_zone_init(dev); + if (rv) + goto out_cleanup_blk_queue; + + blk_queue_chunk_sectors(nullb->q, dev->zone_size_sects); + nullb->q->limits.zoned = BLK_ZONED_HM; + } + nullb->q->queuedata = nullb; blk_queue_flag_set(QUEUE_FLAG_NONROT, nullb->q); blk_queue_flag_clear(QUEUE_FLAG_ADD_RANDOM, nullb->q); @@ -1755,13 +1791,16 @@ static int null_add_dev(struct nullb_device *dev) rv = null_gendisk_register(nullb); if (rv) - goto out_cleanup_blk_queue; + goto out_cleanup_zone; mutex_lock(&lock); list_add_tail(&nullb->list, &nullb_list); mutex_unlock(&lock); return 0; +out_cleanup_zone: + if (dev->zoned) + null_zone_exit(dev); out_cleanup_blk_queue: blk_cleanup_queue(nullb->q); out_cleanup_tags: @@ -1788,6 +1827,11 @@ static int __init null_init(void) g_bs = PAGE_SIZE; } + if (!is_power_of_2(g_zone_size)) { + pr_err("null_blk: zone_size must be power-of-two\n"); + return -EINVAL; + } + if (g_queue_mode == NULL_Q_MQ && g_use_per_node_hctx) { if (g_submit_queues != nr_online_nodes) { pr_warn("null_blk: submit_queues param is set to %u.\n", |