diff options
Diffstat (limited to 'drivers/block/null_blk/main.c')
| -rw-r--r-- | drivers/block/null_blk/main.c | 86 |
1 files changed, 49 insertions, 37 deletions
diff --git a/drivers/block/null_blk/main.c b/drivers/block/null_blk/main.c index 175566a71bb3..41c2cd5818b4 100644 --- a/drivers/block/null_blk/main.c +++ b/drivers/block/null_blk/main.c @@ -592,41 +592,41 @@ static ssize_t nullb_device_zone_offline_store(struct config_item *item, CONFIGFS_ATTR_WO(nullb_device_, zone_offline); static struct configfs_attribute *nullb_device_attrs[] = { - &nullb_device_attr_size, + &nullb_device_attr_badblocks, + &nullb_device_attr_blocking, + &nullb_device_attr_blocksize, + &nullb_device_attr_cache_size, &nullb_device_attr_completion_nsec, - &nullb_device_attr_submit_queues, - &nullb_device_attr_poll_queues, + &nullb_device_attr_discard, + &nullb_device_attr_fua, &nullb_device_attr_home_node, - &nullb_device_attr_queue_mode, - &nullb_device_attr_blocksize, - &nullb_device_attr_max_sectors, - &nullb_device_attr_irqmode, &nullb_device_attr_hw_queue_depth, &nullb_device_attr_index, - &nullb_device_attr_blocking, - &nullb_device_attr_use_per_node_hctx, - &nullb_device_attr_power, - &nullb_device_attr_memory_backed, - &nullb_device_attr_discard, + &nullb_device_attr_irqmode, + &nullb_device_attr_max_sectors, &nullb_device_attr_mbps, - &nullb_device_attr_cache_size, - &nullb_device_attr_badblocks, - &nullb_device_attr_zoned, - &nullb_device_attr_zone_size, + &nullb_device_attr_memory_backed, + &nullb_device_attr_no_sched, + &nullb_device_attr_poll_queues, + &nullb_device_attr_power, + &nullb_device_attr_queue_mode, + &nullb_device_attr_rotational, + &nullb_device_attr_shared_tag_bitmap, + &nullb_device_attr_shared_tags, + &nullb_device_attr_size, + &nullb_device_attr_submit_queues, + &nullb_device_attr_use_per_node_hctx, + &nullb_device_attr_virt_boundary, + &nullb_device_attr_zone_append_max_sectors, &nullb_device_attr_zone_capacity, - &nullb_device_attr_zone_nr_conv, - &nullb_device_attr_zone_max_open, + &nullb_device_attr_zone_full, &nullb_device_attr_zone_max_active, - &nullb_device_attr_zone_append_max_sectors, - &nullb_device_attr_zone_readonly, + &nullb_device_attr_zone_max_open, + &nullb_device_attr_zone_nr_conv, &nullb_device_attr_zone_offline, - &nullb_device_attr_zone_full, - &nullb_device_attr_virt_boundary, - &nullb_device_attr_no_sched, - &nullb_device_attr_shared_tags, - &nullb_device_attr_shared_tag_bitmap, - &nullb_device_attr_fua, - &nullb_device_attr_rotational, + &nullb_device_attr_zone_readonly, + &nullb_device_attr_zone_size, + &nullb_device_attr_zoned, NULL, }; @@ -704,16 +704,28 @@ 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, - "badblocks,blocking,blocksize,cache_size,fua," - "completion_nsec,discard,home_node,hw_queue_depth," - "irqmode,max_sectors,mbps,memory_backed,no_sched," - "poll_queues,power,queue_mode,shared_tag_bitmap," - "shared_tags,size,submit_queues,use_per_node_hctx," - "virt_boundary,zoned,zone_capacity,zone_max_active," - "zone_max_open,zone_nr_conv,zone_offline,zone_readonly," - "zone_size,zone_append_max_sectors,zone_full," - "rotational\n"); + + struct configfs_attribute **entry; + char delimiter = ','; + size_t left = PAGE_SIZE; + size_t written = 0; + int ret; + + for (entry = &nullb_device_attrs[0]; *entry && left > 0; entry++) { + if (!*(entry + 1)) + delimiter = '\n'; + ret = snprintf(page + written, left, "%s%c", (*entry)->ca_name, + delimiter); + if (ret >= left) { + WARN_ONCE(1, "Too many null_blk features to print\n"); + memzero_explicit(page, PAGE_SIZE); + return -ENOBUFS; + } + left -= ret; + written += ret; + } + + return written; } CONFIGFS_ATTR_RO(memb_group_, features); |