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bbb1ebe7a9
All callers of bio_blkcg actually want the CSS, so replace it with an interface that does return the CSS. This now allows to move struct blkcg_gq to block/blk-cgroup.h instead of exposing it in a public header. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Tejun Heo <tj@kernel.org> Link: https://lore.kernel.org/r/20220420042723.1010598-10-hch@lst.de Signed-off-by: Jens Axboe <axboe@kernel.dk>
61 lines
1.9 KiB
C
61 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _BLK_CGROUP_H
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#define _BLK_CGROUP_H
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/*
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* Common Block IO controller cgroup interface
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*
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* Based on ideas and code from CFQ, CFS and BFQ:
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* Copyright (C) 2003 Jens Axboe <axboe@kernel.dk>
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*
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* Copyright (C) 2008 Fabio Checconi <fabio@gandalf.sssup.it>
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* Paolo Valente <paolo.valente@unimore.it>
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*
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* Copyright (C) 2009 Vivek Goyal <vgoyal@redhat.com>
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* Nauman Rafique <nauman@google.com>
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*/
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#include <linux/cgroup.h>
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#include <linux/percpu.h>
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#include <linux/percpu_counter.h>
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#include <linux/u64_stats_sync.h>
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#include <linux/seq_file.h>
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#include <linux/radix-tree.h>
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#include <linux/blkdev.h>
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#include <linux/atomic.h>
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#include <linux/kthread.h>
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#include <linux/fs.h>
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#define FC_APPID_LEN 129
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#ifdef CONFIG_BLK_CGROUP
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extern struct cgroup_subsys_state * const blkcg_root_css;
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void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay);
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void blkcg_maybe_throttle_current(void);
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bool blk_cgroup_congested(void);
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void blkcg_pin_online(struct cgroup_subsys_state *blkcg_css);
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void blkcg_unpin_online(struct cgroup_subsys_state *blkcg_css);
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struct list_head *blkcg_get_cgwb_list(struct cgroup_subsys_state *css);
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struct cgroup_subsys_state *bio_blkcg_css(struct bio *bio);
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#else /* CONFIG_BLK_CGROUP */
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#define blkcg_root_css ((struct cgroup_subsys_state *)ERR_PTR(-EINVAL))
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static inline void blkcg_maybe_throttle_current(void) { }
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static inline bool blk_cgroup_congested(void) { return false; }
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#ifdef CONFIG_BLOCK
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static inline void blkcg_schedule_throttle(struct request_queue *q, bool use_memdelay) { }
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static inline struct cgroup_subsys_state *bio_blkcg_css(struct bio *bio)
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{
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return NULL;
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}
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#endif /* CONFIG_BLOCK */
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#endif /* CONFIG_BLK_CGROUP */
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int blkcg_set_fc_appid(char *app_id, u64 cgrp_id, size_t app_id_len);
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char *blkcg_get_fc_appid(struct bio *bio);
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#endif /* _BLK_CGROUP_H */
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