Add a sysfs queue attribute 'zoned' to display the zone layout for zoned devices. Signed-off-by: Hannes Reinecke <hare@xxxxxxx> --- block/blk-sysfs.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 73200b8..7ffbc44 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -229,6 +229,42 @@ static ssize_t queue_max_hw_sectors_show(struct request_queue *q, char *page) return queue_var_show(max_hw_sectors_kb, (page)); } +#ifdef CONFIG_BLK_DEV_ZONED +static ssize_t queue_zoned_show(struct request_queue *q, char *page) +{ + struct rb_node *node; + struct blk_zone *zone; + ssize_t offset = 0, end = 0; + size_t size = 0, num = 0; + enum blk_zone_type type = BLK_ZONE_TYPE_UNKNOWN; + + for (node = rb_first(&q->zones); node; node = rb_next(node)) { + zone = rb_entry(node, struct blk_zone, node); + if (zone->type != type || + zone->len != size || + end != zone->start) { + if (size != 0) + offset += sprintf(page + offset, "%zu\n", num); + /* We can only store one page ... */ + if (offset + 42 > PAGE_SIZE) { + offset += sprintf(page + offset, "...\n"); + return offset; + } + size = zone->len; + type = zone->type; + offset += sprintf(page + offset, "%zu %zu %d ", + zone->start, size, type); + num = 0; + end = zone->start + size; + } else + end += zone->len; + num++; + } + offset += sprintf(page + offset, "%zu\n", num); + return offset; +} +#endif + #define QUEUE_SYSFS_BIT_FNS(name, flag, neg) \ static ssize_t \ queue_show_##name(struct request_queue *q, char *page) \ @@ -484,6 +520,13 @@ static struct queue_sysfs_entry queue_write_same_max_entry = { .show = queue_write_same_max_show, }; +#ifdef CONFIG_BLK_DEV_ZONED +static struct queue_sysfs_entry queue_zoned_entry = { + .attr = {.name = "zoned", .mode = S_IRUGO }, + .show = queue_zoned_show, +}; +#endif + static struct queue_sysfs_entry queue_nonrot_entry = { .attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR }, .show = queue_show_nonrot, @@ -547,6 +590,9 @@ static struct attribute *default_attrs[] = { &queue_discard_zeroes_data_entry.attr, &queue_write_same_max_entry.attr, &queue_nonrot_entry.attr, +#ifdef CONFIG_BLK_DEV_ZONED + &queue_zoned_entry.attr, +#endif &queue_nomerges_entry.attr, &queue_rq_affinity_entry.attr, &queue_iostats_entry.attr, -- 1.8.5.6 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html