1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef _BLK_CGROUP_H |
3 | #define _BLK_CGROUP_H |
4 | /* |
5 | * Common Block IO controller cgroup interface |
6 | * |
7 | * Based on ideas and code from CFQ, CFS and BFQ: |
8 | * Copyright (C) 2003 Jens Axboe <axboe@kernel.dk> |
9 | * |
10 | * Copyright (C) 2008 Fabio Checconi <fabio@gandalf.sssup.it> |
11 | * Paolo Valente <paolo.valente@unimore.it> |
12 | * |
13 | * Copyright (C) 2009 Vivek Goyal <vgoyal@redhat.com> |
14 | * Nauman Rafique <nauman@google.com> |
15 | */ |
16 | |
17 | #include <linux/types.h> |
18 | |
19 | struct bio; |
20 | struct cgroup_subsys_state; |
21 | struct gendisk; |
22 | |
23 | #define FC_APPID_LEN 129 |
24 | |
25 | #ifdef CONFIG_BLK_CGROUP |
26 | extern struct cgroup_subsys_state * const blkcg_root_css; |
27 | |
28 | void blkcg_schedule_throttle(struct gendisk *disk, bool use_memdelay); |
29 | void blkcg_maybe_throttle_current(void); |
30 | bool blk_cgroup_congested(void); |
31 | void blkcg_pin_online(struct cgroup_subsys_state *blkcg_css); |
32 | void blkcg_unpin_online(struct cgroup_subsys_state *blkcg_css); |
33 | struct list_head *blkcg_get_cgwb_list(struct cgroup_subsys_state *css); |
34 | struct cgroup_subsys_state *bio_blkcg_css(struct bio *bio); |
35 | |
36 | #else /* CONFIG_BLK_CGROUP */ |
37 | |
38 | #define blkcg_root_css ((struct cgroup_subsys_state *)ERR_PTR(-EINVAL)) |
39 | |
40 | static inline void blkcg_maybe_throttle_current(void) { } |
41 | static inline bool blk_cgroup_congested(void) { return false; } |
42 | static inline struct cgroup_subsys_state *bio_blkcg_css(struct bio *bio) |
43 | { |
44 | return NULL; |
45 | } |
46 | #endif /* CONFIG_BLK_CGROUP */ |
47 | |
48 | int blkcg_set_fc_appid(char *app_id, u64 cgrp_id, size_t app_id_len); |
49 | char *blkcg_get_fc_appid(struct bio *bio); |
50 | |
51 | #endif /* _BLK_CGROUP_H */ |
52 | |