block/blk-mq-debugfs.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef INT_BLK_MQ_DEBUGFS_H
   3 #define INT_BLK_MQ_DEBUGFS_H
   4
   5 #ifdef CONFIG_BLK_DEBUG_FS
   6
   7 #include <linux/seq_file.h>
   8
   9 struct blk_mq_debugfs_attr {
  10         const char *name;
  11         umode_t mode;
  12         int (*show)(void *, struct seq_file *);
  13         ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
  14         /* Set either .show or .seq_ops. */
  15         const struct seq_operations *seq_ops;
  16 };
  17
  18 int __blk_mq_debugfs_rq_show(struct seq_file *m, struct request *rq);
  19 int blk_mq_debugfs_rq_show(struct seq_file *m, void *v);
  20
  21 int blk_mq_debugfs_register(struct request_queue *q);
  22 void blk_mq_debugfs_unregister(struct request_queue *q);
  23 int blk_mq_debugfs_register_hctx(struct request_queue *q,
  24                                  struct blk_mq_hw_ctx *hctx);
  25 void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx);
  26 int blk_mq_debugfs_register_hctxs(struct request_queue *q);
  27 void blk_mq_debugfs_unregister_hctxs(struct request_queue *q);
  28
  29 int blk_mq_debugfs_register_sched(struct request_queue *q);
  30 void blk_mq_debugfs_unregister_sched(struct request_queue *q);
  31 int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
  32                                        struct blk_mq_hw_ctx *hctx);
  33 void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx);
  34 #else
  35 static inline int blk_mq_debugfs_register(struct request_queue *q)
  36 {
  37         return 0;
  38 }
  39
  40 static inline void blk_mq_debugfs_unregister(struct request_queue *q)
  41 {
  42 }
  43
  44 static inline int blk_mq_debugfs_register_hctx(struct request_queue *q,
  45                                                struct blk_mq_hw_ctx *hctx)
  46 {
  47         return 0;
  48 }
  49
  50 static inline void blk_mq_debugfs_unregister_hctx(struct blk_mq_hw_ctx *hctx)
  51 {
  52 }
  53
  54 static inline int blk_mq_debugfs_register_hctxs(struct request_queue *q)
  55 {
  56         return 0;
  57 }
  58
  59 static inline void blk_mq_debugfs_unregister_hctxs(struct request_queue *q)
  60 {
  61 }
  62
  63 static inline int blk_mq_debugfs_register_sched(struct request_queue *q)
  64 {
  65         return 0;
  66 }
  67
  68 static inline void blk_mq_debugfs_unregister_sched(struct request_queue *q)
  69 {
  70 }
  71
  72 static inline int blk_mq_debugfs_register_sched_hctx(struct request_queue *q,
  73                                                      struct blk_mq_hw_ctx *hctx)
  74 {
  75         return 0;
  76 }
  77
  78 static inline void blk_mq_debugfs_unregister_sched_hctx(struct blk_mq_hw_ctx *hctx)
  79 {
  80 }
  81 #endif
  82
  83 #endif