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authorWeiping Zhang <zhangweiping@didiglobal.com>2019-04-02 13:14:30 (GMT)
committerJens Axboe <axboe@kernel.dk>2019-04-22 15:48:12 (GMT)
commit4d25339e32a1b6e1f490bb78b1e5b0fa9eb3e073 (patch)
tree119ba95c6b529016f6136dcc2afb509f465c495f /block
parentf9f76879bc4521019697970bad3bc1dd0bec211f (diff)
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block: don't show io_timeout if driver has no timeout handler
If the low level driver has no timeout handler, the /sys/block/<disk>/queue/io_timeout will not be displayed. Reviewed-by: Bart Van Assche <bvanassche@acm.org> Signed-off-by: Weiping Zhang <zhangweiping@didiglobal.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block')
-rw-r--r--block/blk-sysfs.c30
1 files changed, 28 insertions, 2 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c
index 4223270..a16a02c 100644
--- a/block/blk-sysfs.c
+++ b/block/blk-sysfs.c
@@ -728,7 +728,7 @@ static struct queue_sysfs_entry throtl_sample_time_entry = {
};
#endif
-static struct attribute *default_attrs[] = {
+static struct attribute *queue_attrs[] = {
&queue_requests_entry.attr,
&queue_ra_entry.attr,
&queue_max_hw_sectors_entry.attr,
@@ -770,6 +770,25 @@ static struct attribute *default_attrs[] = {
NULL,
};
+static umode_t queue_attr_visible(struct kobject *kobj, struct attribute *attr,
+ int n)
+{
+ struct request_queue *q =
+ container_of(kobj, struct request_queue, kobj);
+
+ if (attr == &queue_io_timeout_entry.attr &&
+ (!q->mq_ops || !q->mq_ops->timeout))
+ return 0;
+
+ return attr->mode;
+}
+
+static struct attribute_group queue_attr_group = {
+ .attrs = queue_attrs,
+ .is_visible = queue_attr_visible,
+};
+
+
#define to_queue(atr) container_of((atr), struct queue_sysfs_entry, attr)
static ssize_t
@@ -890,7 +909,6 @@ static const struct sysfs_ops queue_sysfs_ops = {
struct kobj_type blk_queue_ktype = {
.sysfs_ops = &queue_sysfs_ops,
- .default_attrs = default_attrs,
.release = blk_release_queue,
};
@@ -939,6 +957,14 @@ int blk_register_queue(struct gendisk *disk)
goto unlock;
}
+ ret = sysfs_create_group(&q->kobj, &queue_attr_group);
+ if (ret) {
+ blk_trace_remove_sysfs(dev);
+ kobject_del(&q->kobj);
+ kobject_put(&dev->kobj);
+ goto unlock;
+ }
+
if (queue_is_mq(q)) {
__blk_mq_register_dev(dev, q);
blk_mq_debugfs_register(q);