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1/* SPDX-License-Identifier: GPL-2.0 */2#ifndef _BLK_CGROUP_H3#define _BLK_CGROUP_H4/*5 * Common Block IO controller cgroup interface6 *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 19struct bio;20struct cgroup_subsys_state;21struct gendisk;22 23#define FC_APPID_LEN 12924 25#ifdef CONFIG_BLK_CGROUP26extern struct cgroup_subsys_state * const blkcg_root_css;27 28void blkcg_schedule_throttle(struct gendisk *disk, bool use_memdelay);29void blkcg_maybe_throttle_current(void);30bool blk_cgroup_congested(void);31void blkcg_pin_online(struct cgroup_subsys_state *blkcg_css);32void blkcg_unpin_online(struct cgroup_subsys_state *blkcg_css);33struct list_head *blkcg_get_cgwb_list(struct cgroup_subsys_state *css);34struct 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 40static inline void blkcg_maybe_throttle_current(void) { }41static inline bool blk_cgroup_congested(void) { return false; }42static inline struct cgroup_subsys_state *bio_blkcg_css(struct bio *bio)43{44 return NULL;45}46#endif /* CONFIG_BLK_CGROUP */47 48int blkcg_set_fc_appid(char *app_id, u64 cgrp_id, size_t app_id_len);49char *blkcg_get_fc_appid(struct bio *bio);50 51#endif /* _BLK_CGROUP_H */52