diff options
Diffstat (limited to 'block/mq-deadline.c')
| -rw-r--r-- | block/mq-deadline.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/block/mq-deadline.c b/block/mq-deadline.c index 236121633ca0..1b964a387afe 100644 --- a/block/mq-deadline.c +++ b/block/mq-deadline.c @@ -19,6 +19,7 @@ #include "blk.h" #include "blk-mq.h" +#include "blk-mq-debugfs.h" #include "blk-mq-tag.h" #include "blk-mq-sched.h" @@ -517,6 +518,125 @@ static struct elv_fs_entry deadline_attrs[] = { __ATTR_NULL }; +#ifdef CONFIG_BLK_DEBUG_FS +#define DEADLINE_DEBUGFS_DDIR_ATTRS(ddir, name) \ +static void *deadline_##name##_fifo_start(struct seq_file *m, \ + loff_t *pos) \ + __acquires(&dd->lock) \ +{ \ + struct request_queue *q = m->private; \ + struct deadline_data *dd = q->elevator->elevator_data; \ + \ + spin_lock(&dd->lock); \ + return seq_list_start(&dd->fifo_list[ddir], *pos); \ +} \ + \ +static void *deadline_##name##_fifo_next(struct seq_file *m, void *v, \ + loff_t *pos) \ +{ \ + struct request_queue *q = m->private; \ + struct deadline_data *dd = q->elevator->elevator_data; \ + \ + return seq_list_next(v, &dd->fifo_list[ddir], pos); \ +} \ + \ +static void deadline_##name##_fifo_stop(struct seq_file *m, void *v) \ + __releases(&dd->lock) \ +{ \ + struct request_queue *q = m->private; \ + struct deadline_data *dd = q->elevator->elevator_data; \ + \ + spin_unlock(&dd->lock); \ +} \ + \ +static const struct seq_operations deadline_##name##_fifo_seq_ops = { \ + .start = deadline_##name##_fifo_start, \ + .next = deadline_##name##_fifo_next, \ + .stop = deadline_##name##_fifo_stop, \ + .show = blk_mq_debugfs_rq_show, \ +}; \ + \ +static int deadline_##name##_next_rq_show(void *data, \ + struct seq_file *m) \ +{ \ + struct request_queue *q = data; \ + struct deadline_data *dd = q->elevator->elevator_data; \ + struct request *rq = dd->next_rq[ddir]; \ + \ + if (rq) \ + __blk_mq_debugfs_rq_show(m, rq); \ + return 0; \ +} +DEADLINE_DEBUGFS_DDIR_ATTRS(READ, read) +DEADLINE_DEBUGFS_DDIR_ATTRS(WRITE, write) +#undef DEADLINE_DEBUGFS_DDIR_ATTRS + +static int deadline_batching_show(void *data, struct seq_file *m) +{ + struct request_queue *q = data; + struct deadline_data *dd = q->elevator->elevator_data; + + seq_printf(m, "%u\n", dd->batching); + return 0; +} + +static int deadline_starved_show(void *data, struct seq_file *m) +{ + struct request_queue *q = data; + struct deadline_data *dd = q->elevator->elevator_data; + + seq_printf(m, "%u\n", dd->starved); + return 0; +} + +static void *deadline_dispatch_start(struct seq_file *m, loff_t *pos) + __acquires(&dd->lock) +{ + struct request_queue *q = m->private; + struct deadline_data *dd = q->elevator->elevator_data; + + spin_lock(&dd->lock); + return seq_list_start(&dd->dispatch, *pos); +} + +static void *deadline_dispatch_next(struct seq_file *m, void *v, loff_t *pos) +{ + struct request_queue *q = m->private; + struct deadline_data *dd = q->elevator->elevator_data; + + return seq_list_next(v, &dd->dispatch, pos); +} + +static void deadline_dispatch_stop(struct seq_file *m, void *v) + __releases(&dd->lock) +{ + struct request_queue *q = m->private; + struct deadline_data *dd = q->elevator->elevator_data; + + spin_unlock(&dd->lock); +} + +static const struct seq_operations deadline_dispatch_seq_ops = { + .start = deadline_dispatch_start, + .next = deadline_dispatch_next, + .stop = deadline_dispatch_stop, + .show = blk_mq_debugfs_rq_show, +}; + +#define DEADLINE_QUEUE_DDIR_ATTRS(name) \ + {#name "_fifo_list", 0400, .seq_ops = &deadline_##name##_fifo_seq_ops}, \ + {#name "_next_rq", 0400, deadline_##name##_next_rq_show} +static const struct blk_mq_debugfs_attr deadline_queue_debugfs_attrs[] = { + DEADLINE_QUEUE_DDIR_ATTRS(read), + DEADLINE_QUEUE_DDIR_ATTRS(write), + {"batching", 0400, deadline_batching_show}, + {"starved", 0400, deadline_starved_show}, + {"dispatch", 0400, .seq_ops = &deadline_dispatch_seq_ops}, + {}, +}; +#undef DEADLINE_QUEUE_DDIR_ATTRS +#endif + static struct elevator_type mq_deadline = { .ops.mq = { .insert_requests = dd_insert_requests, @@ -533,6 +653,9 @@ static struct elevator_type mq_deadline = { }, .uses_mq = true, +#ifdef CONFIG_BLK_DEBUG_FS + .queue_debugfs_attrs = deadline_queue_debugfs_attrs, +#endif .elevator_attrs = deadline_attrs, .elevator_name = "mq-deadline", .elevator_owner = THIS_MODULE, |