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authorYigal Korman <yigal@plexistor.com>2016-06-23 17:05:51 -0400
committerJens Axboe <axboe@fb.com>2016-07-20 21:01:08 -0600
commitea6ca600eb90350259cee5514e97b91ad1bc1aa5 (patch)
tree9dc83459ff157e16ad1951c11bfaaec6452dd5e1 /block/blk-sysfs.c
parent163d4baaebe39c0e56d9c08597eab7b3ae0bf334 (diff)
downloadlinux-0-day-ea6ca600eb90350259cee5514e97b91ad1bc1aa5.tar.gz
block: expose QUEUE_FLAG_DAX in sysfs
Provides the ability to identify DAX enabled devices in userspace. Signed-off-by: Yigal Korman <yigal@plexistor.com> Signed-off-by: Toshi Kani <toshi.kani@hpe.com> Acked-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'block/blk-sysfs.c')
-rw-r--r--block/blk-sysfs.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 9920596..f87a7e7 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -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,
};