66 lines
1.3 KiB
C
66 lines
1.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef SSG_CGROUP_H
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#define SSG_CGROUP_H
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#include <linux/blk-cgroup.h>
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#if IS_ENABLED(CONFIG_MQ_IOSCHED_SSG_CGROUP)
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struct ssg_blkcg {
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struct blkcg_policy_data cpd; /* must be the first member */
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int max_available_ratio;
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};
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struct ssg_blkg {
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struct blkg_policy_data pd; /* must be the first member */
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atomic_t current_rqs;
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int max_available_rqs;
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unsigned int shallow_depth; /* shallow depth for each tag map to get sched tag */
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};
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extern int ssg_blkcg_init(void);
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extern void ssg_blkcg_exit(void);
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extern int ssg_blkcg_activate(struct request_queue *q);
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extern void ssg_blkcg_deactivate(struct request_queue *q);
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extern unsigned int ssg_blkcg_shallow_depth(struct request_queue *q);
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extern void ssg_blkcg_depth_updated(struct blk_mq_hw_ctx *hctx);
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extern void ssg_blkcg_inc_rq(struct blkcg_gq *blkg);
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extern void ssg_blkcg_dec_rq(struct blkcg_gq *blkg);
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#else
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int ssg_blkcg_init(void)
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{
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return 0;
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}
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void ssg_blkcg_exit(void)
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{
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}
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int ssg_blkcg_activate(struct request_queue *q)
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{
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return 0;
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}
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void ssg_blkcg_deactivate(struct request_queue *q)
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{
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}
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unsigned int ssg_blkcg_shallow_depth(struct request_queue *q)
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{
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return 0;
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}
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void ssg_blkcg_depth_updated(struct blk_mq_hw_ctx *hctx)
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{
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}
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void ssg_blkcg_inc_rq(struct blkcg_gq *blkg)
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{
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}
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void ssg_blkcg_dec_rq(struct blkcg_gq *blkg)
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{
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}
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#endif
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#endif
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