mq-deadline: add debugfs attributes

Expose the fifo lists, cached next requests, batching state, and
dispatch list. It'd also be possible to add the sorted lists, but there
aren't already seq_file helpers for rbtrees.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Jens Axboe <axboe@fb.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/block/blk-mq-debugfs.c b/block/blk-mq-debugfs.c
index 8ec738f872e5..803aed4d7221 100644
--- a/block/blk-mq-debugfs.c
+++ b/block/blk-mq-debugfs.c
@@ -267,9 +267,8 @@ static const char *const rqf_name[] = {
 };
 #undef RQF_NAME
 
-int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
+int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq)
 {
-        struct request *rq = list_entry_rq(v);
         const struct blk_mq_ops *const mq_ops = rq->q->mq_ops;
         const unsigned int op = rq->cmd_flags & REQ_OP_MASK;
 
@@ -291,6 +290,12 @@ int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
         seq_puts(m, "}\n");
         return 0;
 }
+EXPORT_SYMBOL_GPL(__blk_mq_debugfs_rq_show);
+
+int blk_mq_debugfs_rq_show(struct seq_file *m, void *v)
+{
+        return __blk_mq_debugfs_rq_show(m, list_entry_rq(v));
+}
 EXPORT_SYMBOL_GPL(blk_mq_debugfs_rq_show);
 
 static void *hctx_dispatch_start(struct seq_file *m, loff_t *pos)