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-rw-r--r--block/blk-sysfs.c33
1 files changed, 33 insertions, 0 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 8a6d81afb284..8606c9543fdd 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -126,6 +126,21 @@ static ssize_t queue_io_opt_show(struct request_queue *q, char *page)
return queue_var_show(queue_io_opt(q), page);
}
+static ssize_t queue_discard_granularity_show(struct request_queue *q, char *page)
+{
+ return queue_var_show(q->limits.discard_granularity, page);
+}
+
+static ssize_t queue_discard_max_show(struct request_queue *q, char *page)
+{
+ return queue_var_show(q->limits.max_discard_sectors << 9, page);
+}
+
+static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *page)
+{
+ return queue_var_show(queue_discard_zeroes_data(q), page);
+}
+
static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
{
@@ -293,6 +308,21 @@ static struct queue_sysfs_entry queue_io_opt_entry = {
.show = queue_io_opt_show,
};
+static struct queue_sysfs_entry queue_discard_granularity_entry = {
+ .attr = {.name = "discard_granularity", .mode = S_IRUGO },
+ .show = queue_discard_granularity_show,
+};
+
+static struct queue_sysfs_entry queue_discard_max_entry = {
+ .attr = {.name = "discard_max_bytes", .mode = S_IRUGO },
+ .show = queue_discard_max_show,
+};
+
+static struct queue_sysfs_entry queue_discard_zeroes_data_entry = {
+ .attr = {.name = "discard_zeroes_data", .mode = S_IRUGO },
+ .show = queue_discard_zeroes_data_show,
+};
+
static struct queue_sysfs_entry queue_nonrot_entry = {
.attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR },
.show = queue_nonrot_show,
@@ -328,6 +358,9 @@ static struct attribute *default_attrs[] = {
&queue_physical_block_size_entry.attr,
&queue_io_min_entry.attr,
&queue_io_opt_entry.attr,
+ &queue_discard_granularity_entry.attr,
+ &queue_discard_max_entry.attr,
+ &queue_discard_zeroes_data_entry.attr,
&queue_nonrot_entry.attr,
&queue_nomerges_entry.attr,
&queue_rq_affinity_entry.attr,