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Commit ea6ca600 authored by Yigal Korman's avatar Yigal Korman Committed by Jens Axboe
Browse files

block: expose QUEUE_FLAG_DAX in sysfs 



Provides the ability to identify DAX enabled devices in userspace.

Signed-off-by: default avatarYigal Korman <yigal@plexistor.com>
Signed-off-by: default avatarToshi Kani <toshi.kani@hpe.com>
Acked-by: default avatarDan Williams <dan.j.williams@intel.com>
Signed-off-by: default avatarMike Snitzer <snitzer@redhat.com>
Signed-off-by: default avatarJens Axboe <axboe@fb.com>
parent 163d4baa

block/blk-sysfs.c

+11 −0
Original line number Diff line number Diff line
@@ -379,6 +379,11 @@ static ssize_t queue_wc_store(struct request_queue *q, const char *page, 
	return count;

}



static ssize_t queue_dax_show(struct request_queue *q, char *page)

{

	return queue_var_show(blk_queue_dax(q), page);

}



static struct queue_sysfs_entry queue_requests_entry = {

	.attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR },

	.show = queue_requests_show,
@@ -516,6 +521,11 @@ static struct queue_sysfs_entry queue_wc_entry = { 
	.store = queue_wc_store,

};



static struct queue_sysfs_entry queue_dax_entry = {

	.attr = {.name = "dax", .mode = S_IRUGO },

	.show = queue_dax_show,

};



static struct attribute *default_attrs[] = {

	&queue_requests_entry.attr,

	&queue_ra_entry.attr,
@@ -542,6 +552,7 @@ static struct attribute *default_attrs[] = { 
	&queue_random_entry.attr,

	&queue_poll_entry.attr,

	&queue_wc_entry.attr,

	&queue_dax_entry.attr,

	NULL,

};