diff options
Diffstat (limited to 'drivers/block/null_blk')
| -rw-r--r-- | drivers/block/null_blk/main.c | 12 | ||||
| -rw-r--r-- | drivers/block/null_blk/null_blk.h | 1 |
2 files changed, 12 insertions, 1 deletions
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index d6c821d48090..c35872cc5f37 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -84,6 +84,10 @@ enum { NULL_Q_MQ = 2, }; +static bool g_virt_boundary = false; +module_param_named(virt_boundary, g_virt_boundary, bool, 0444); +MODULE_PARM_DESC(virt_boundary, "Require a virtual boundary for the device. Default: False"); + static int g_no_sched; module_param_named(no_sched, g_no_sched, int, 0444); MODULE_PARM_DESC(no_sched, "No io scheduler"); @@ -366,6 +370,7 @@ NULLB_DEVICE_ATTR(zone_capacity, ulong, NULL); NULLB_DEVICE_ATTR(zone_nr_conv, uint, NULL); NULLB_DEVICE_ATTR(zone_max_open, uint, NULL); NULLB_DEVICE_ATTR(zone_max_active, uint, NULL); +NULLB_DEVICE_ATTR(virt_boundary, bool, NULL); static ssize_t nullb_device_power_show(struct config_item *item, char *page) { @@ -486,6 +491,7 @@ static struct configfs_attribute *nullb_device_attrs[] = { &nullb_device_attr_zone_nr_conv, &nullb_device_attr_zone_max_open, &nullb_device_attr_zone_max_active, + &nullb_device_attr_virt_boundary, NULL, }; @@ -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,bandwidth,cache,badblocks,zoned,zone_size,zone_capacity,zone_nr_conv,zone_max_open,zone_max_active,blocksize,max_sectors,virt_boundary\n"); } CONFIGFS_ATTR_RO(memb_group_, features); @@ -605,6 +611,7 @@ static struct nullb_device *null_alloc_dev(void) dev->zone_nr_conv = g_zone_nr_conv; dev->zone_max_open = g_zone_max_open; dev->zone_max_active = g_zone_max_active; + dev->virt_boundary = g_virt_boundary; return dev; } @@ -1880,6 +1887,9 @@ static int null_add_dev(struct nullb_device *dev) BLK_DEF_MAX_SECTORS); blk_queue_max_hw_sectors(nullb->q, dev->max_sectors); + if (dev->virt_boundary) + blk_queue_virt_boundary(nullb->q, PAGE_SIZE - 1); + null_config_discard(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..5ad5087ebe39 100644 --- a/drivers/block/null_blk/null_blk.h +++ b/drivers/block/null_blk/null_blk.h @@ -96,6 +96,7 @@ struct nullb_device { bool memory_backed; /* if data is stored in memory */ bool discard; /* if support discard */ bool zoned; /* if device is zoned */ + bool virt_boundary; /* virtual boundary on/off for the device */ }; struct nullb { |