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block: Implement support for WRITE SAME
[firefly-linux-kernel-4.4.55.git]
/
block
/
blk-sysfs.c
diff --git
a/block/blk-sysfs.c
b/block/blk-sysfs.c
index ea51d827a0bb5cd7064b485d3b1dbe13e841c34d..247dbfd42621bb5222217683e00e279da6a002d2 100644
(file)
--- a/
block/blk-sysfs.c
+++ b/
block/blk-sysfs.c
@@
-180,6
+180,13
@@
static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *pag
return queue_var_show(queue_discard_zeroes_data(q), page);
}
return queue_var_show(queue_discard_zeroes_data(q), page);
}
+static ssize_t queue_write_same_max_show(struct request_queue *q, char *page)
+{
+ return sprintf(page, "%llu\n",
+ (unsigned long long)q->limits.max_write_same_sectors << 9);
+}
+
+
static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
{
static ssize_t
queue_max_sectors_store(struct request_queue *q, const char *page, size_t count)
{
@@
-385,6
+392,11
@@
static struct queue_sysfs_entry queue_discard_zeroes_data_entry = {
.show = queue_discard_zeroes_data_show,
};
.show = queue_discard_zeroes_data_show,
};
+static struct queue_sysfs_entry queue_write_same_max_entry = {
+ .attr = {.name = "write_same_max_bytes", .mode = S_IRUGO },
+ .show = queue_write_same_max_show,
+};
+
static struct queue_sysfs_entry queue_nonrot_entry = {
.attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR },
.show = queue_show_nonrot,
static struct queue_sysfs_entry queue_nonrot_entry = {
.attr = {.name = "rotational", .mode = S_IRUGO | S_IWUSR },
.show = queue_show_nonrot,
@@
-432,6
+444,7
@@
static struct attribute *default_attrs[] = {
&queue_discard_granularity_entry.attr,
&queue_discard_max_entry.attr,
&queue_discard_zeroes_data_entry.attr,
&queue_discard_granularity_entry.attr,
&queue_discard_max_entry.attr,
&queue_discard_zeroes_data_entry.attr,
+ &queue_write_same_max_entry.attr,
&queue_nonrot_entry.attr,
&queue_nomerges_entry.attr,
&queue_rq_affinity_entry.attr,
&queue_nonrot_entry.attr,
&queue_nomerges_entry.attr,
&queue_rq_affinity_entry.attr,