diff options
Diffstat (limited to 'block/blk-sysfs.c')
| -rw-r--r-- | block/blk-sysfs.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 31849e328b45..565b8dac5782 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -317,6 +317,34 @@ queue_rq_affinity_store(struct request_queue *q, const char *page, size_t count) return ret; } +static ssize_t queue_poll_show(struct request_queue *q, char *page) +{ + return queue_var_show(test_bit(QUEUE_FLAG_POLL, &q->queue_flags), page); +} + +static ssize_t queue_poll_store(struct request_queue *q, const char *page, + size_t count) +{ + unsigned long poll_on; + ssize_t ret; + + if (!q->mq_ops || !q->mq_ops->poll) + return -EINVAL; + + ret = queue_var_store(&poll_on, page, count); + if (ret < 0) + return ret; + + spin_lock_irq(q->queue_lock); + if (poll_on) + queue_flag_set(QUEUE_FLAG_POLL, q); + else + queue_flag_clear(QUEUE_FLAG_POLL, q); + spin_unlock_irq(q->queue_lock); + + return ret; +} + static struct queue_sysfs_entry queue_requests_entry = { .attr = {.name = "nr_requests", .mode = S_IRUGO | S_IWUSR }, .show = queue_requests_show, @@ -442,6 +470,12 @@ static struct queue_sysfs_entry queue_random_entry = { .store = queue_store_random, }; +static struct queue_sysfs_entry queue_poll_entry = { + .attr = {.name = "io_poll", .mode = S_IRUGO | S_IWUSR }, + .show = queue_poll_show, + .store = queue_poll_store, +}; + static struct attribute *default_attrs[] = { &queue_requests_entry.attr, &queue_ra_entry.attr, @@ -466,6 +500,7 @@ static struct attribute *default_attrs[] = { &queue_rq_affinity_entry.attr, &queue_iostats_entry.attr, &queue_random_entry.attr, + &queue_poll_entry.attr, NULL, }; |