diff options
| -rw-r--r-- | block/blk-cgroup.c | 373 | ||||
| -rw-r--r-- | block/blk-cgroup.h | 15 | ||||
| -rw-r--r-- | block/blk-throttle.c | 163 | ||||
| -rw-r--r-- | block/cfq-iosched.c | 202 |
4 files changed, 333 insertions, 420 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c index 4e714f8ddcd2..b963fb4b3995 100644 --- a/block/blk-cgroup.c +++ b/block/blk-cgroup.c @@ -63,63 +63,6 @@ struct blkio_cgroup *bio_blkio_cgroup(struct bio *bio) } EXPORT_SYMBOL_GPL(bio_blkio_cgroup); -static inline void blkio_update_group_weight(struct blkio_group *blkg, - int plid, unsigned int weight) -{ - struct blkio_policy_type *blkiop; - - list_for_each_entry(blkiop, &blkio_list, list) { - /* If this policy does not own the blkg, do not send updates */ - if (blkiop->plid != plid) - continue; - if (blkiop->ops.blkio_update_group_weight_fn) - blkiop->ops.blkio_update_group_weight_fn(blkg->q, - blkg, weight); - } -} - -static inline void blkio_update_group_bps(struct blkio_group *blkg, int plid, - u64 bps, int rw) -{ - struct blkio_policy_type *blkiop; - - list_for_each_entry(blkiop, &blkio_list, list) { - - /* If this policy does not own the blkg, do not send updates */ - if (blkiop->plid != plid) - continue; - - if (rw == READ && blkiop->ops.blkio_update_group_read_bps_fn) - blkiop->ops.blkio_update_group_read_bps_fn(blkg->q, - blkg, bps); - - if (rw == WRITE && blkiop->ops.blkio_update_group_write_bps_fn) - blkiop->ops.blkio_update_group_write_bps_fn(blkg->q, - blkg, bps); - } -} - -static inline void blkio_update_group_iops(struct blkio_group *blkg, int plid, - u64 iops, int rw) -{ - struct blkio_policy_type *blkiop; - - list_for_each_entry(blkiop, &blkio_list, list) { - - /* If this policy does not own the blkg, do not send updates */ - if (blkiop->plid != plid) - continue; - - if (rw == READ && blkiop->ops.blkio_update_group_read_iops_fn) - blkiop->ops.blkio_update_group_read_iops_fn(blkg->q, - blkg, iops); - - if (rw == WRITE && blkiop->ops.blkio_update_group_write_iops_fn) - blkiop->ops.blkio_update_group_write_iops_fn(blkg->q, - blkg,iops); - } -} - #ifdef CONFIG_DEBUG_BLK_CGROUP /* This should be called with the queue_lock held. */ static void blkio_set_start_group_wait_time(struct blkio_group *blkg, @@ -939,33 +882,6 @@ int blkcg_print_cpu_rwstat(struct cgroup *cgrp, struct cftype *cft, } EXPORT_SYMBOL_GPL(blkcg_print_cpu_rwstat); -#ifdef CONFIG_DEBUG_BLK_CGROUP -static u64 blkg_prfill_avg_queue_size(struct seq_file *sf, - struct blkg_policy_data *pd, int off) -{ - u64 samples = blkg_stat_read(&pd->stats.avg_queue_size_samples); - u64 v = 0; - - if (samples) { - v = blkg_stat_read(&pd->stats.avg_queue_size_sum); - do_div(v, samples); - } - __blkg_prfill_u64(sf, pd, v); - return 0; -} - -/* print avg_queue_size */ -static int blkcg_print_avg_queue_size(struct cgroup *cgrp, struct cftype *cft, - struct seq_file *sf) -{ - struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); - - blkcg_print_blkgs(sf, blkcg, blkg_prfill_avg_queue_size, - BLKIO_POLICY_PROP, 0, false); - return 0; -} -#endif /* CONFIG_DEBUG_BLK_CGROUP */ - /** * blkg_conf_prep - parse and prepare for per-blkg config update * @blkcg: target block cgroup @@ -1039,300 +955,11 @@ void blkg_conf_finish(struct blkg_conf_ctx *ctx) } EXPORT_SYMBOL_GPL(blkg_conf_finish); -/* for propio conf */ -static u64 blkg_prfill_weight_device(struct seq_file *sf, - struct blkg_policy_data *pd, int off) -{ - if (!pd->conf.weight) - return 0; - return __blkg_prfill_u64(sf, pd, pd->conf.weight); -} - -static int blkcg_print_weight_device(struct cgroup *cgrp, struct cftype *cft, - struct seq_file *sf) -{ - blkcg_print_blkgs(sf, cgroup_to_blkio_cgroup(cgrp), - blkg_prfill_weight_device, BLKIO_POLICY_PROP, 0, - false); - return 0; -} - -static int blkcg_print_weight(struct cgroup *cgrp, struct cftype *cft, - struct seq_file *sf) -{ - seq_printf(sf, "%u\n", cgroup_to_blkio_cgroup(cgrp)->weight); - return 0; -} - -static int blkcg_set_weight_device(struct cgroup *cgrp, struct cftype *cft, - const char *buf) -{ - struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); - struct blkg_policy_data *pd; - struct blkg_conf_ctx ctx; - int ret; - - ret = blkg_conf_prep(blkcg, buf, &ctx); - if (ret) - return ret; - - ret = -EINVAL; - pd = ctx.blkg->pd[BLKIO_POLICY_PROP]; - if (pd && (!ctx.v || (ctx.v >= BLKIO_WEIGHT_MIN && - ctx.v <= BLKIO_WEIGHT_MAX))) { - pd->conf.weight = ctx.v; - blkio_update_group_weight(ctx.blkg, BLKIO_POLICY_PROP, - ctx.v ?: blkcg->weight); - ret = 0; - } - - blkg_conf_finish(&ctx); - return ret; -} - -static int blkcg_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val) -{ - struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); - struct blkio_group *blkg; - struct hlist_node *n; - - if (val < BLKIO_WEIGHT_MIN || val > BLKIO_WEIGHT_MAX) - return -EINVAL; - - spin_lock(&blkio_list_lock); - spin_lock_irq(&blkcg->lock); - blkcg->weight = (unsigned int)val; - - hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node) { - struct blkg_policy_data *pd = blkg->pd[BLKIO_POLICY_PROP]; - - if (pd && !pd->conf.weight) - blkio_update_group_weight(blkg, BLKIO_POLICY_PROP, - blkcg->weight); - } - - spin_unlock_irq(&blkcg->lock); - spin_unlock(&blkio_list_lock); - return 0; -} - -/* for blk-throttle conf */ -#ifdef CONFIG_BLK_DEV_THROTTLING -static u64 blkg_prfill_conf_u64(struct seq_file *sf, - struct blkg_policy_data *pd, int off) -{ - u64 v = *(u64 *)((void *)&pd->conf + off); - - if (!v) - return 0; - return __blkg_prfill_u64(sf, pd, v); -} - -static int blkcg_print_conf_u64(struct cgroup *cgrp, struct cftype *cft, - struct seq_file *sf) -{ - blkcg_print_blkgs(sf, cgroup_to_blkio_cgroup(cgrp), - blkg_prfill_conf_u64, BLKIO_POLICY_THROTL, - cft->private, false); - return 0; -} - -static int blkcg_set_conf_u64(struct cgroup *cgrp, struct cftype *cft, - const char *buf, int rw, - void (*update)(struct blkio_group *, int, u64, int)) -{ - struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); - struct blkg_policy_data *pd; - struct blkg_conf_ctx ctx; - int ret; - - ret = blkg_conf_prep(blkcg, buf, &ctx); - if (ret) - return ret; - - ret = -EINVAL; - pd = ctx.blkg->pd[BLKIO_POLICY_THROTL]; - if (pd) { - *(u64 *)((void *)&pd->conf + cft->private) = ctx.v; - update(ctx.blkg, BLKIO_POLICY_THROTL, ctx.v ?: -1, rw); - ret = 0; - } - - blkg_conf_finish(&ctx); - return ret; -} - -static int blkcg_set_conf_bps_r(struct cgroup *cgrp, struct cftype *cft, - const char *buf) -{ - return blkcg_set_conf_u64(cgrp, cft, buf, READ, blkio_update_group_bps); -} - -static int blkcg_set_conf_bps_w(struct cgroup *cgrp, struct cftype *cft, - const char *buf) -{ - return blkcg_set_conf_u64(cgrp, cft, buf, WRITE, blkio_update_group_bps); -} - -static int blkcg_set_conf_iops_r(struct cgroup *cgrp, struct cftype *cft, - const char *buf) -{ - return blkcg_set_conf_u64(cgrp, cft, buf, READ, blkio_update_group_iops); -} - -static int blkcg_set_conf_iops_w(struct cgroup *cgrp, struct cftype *cft, - const char *buf) -{ - return blkcg_set_conf_u64(cgrp, cft, buf, WRITE, blkio_update_group_iops); -} -#endif - struct cftype blkio_files[] = { { - .name = "weight_device", - .read_seq_string = blkcg_print_weight_device, - .write_string = blkcg_set_weight_device, - .max_write_len = 256, - }, - { - .name = "weight", - .read_seq_string = blkcg_print_weight, - .write_u64 = blkcg_set_weight, - }, - { - .name = "time", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, time)), - .read_seq_string = blkcg_print_stat, - }, - { - .name = "sectors", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats_cpu, sectors)), - .read_seq_string = blkcg_print_cpu_stat, - }, - { - .name = "io_service_bytes", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats_cpu, service_bytes)), - .read_seq_string = blkcg_print_cpu_rwstat, - }, - { - .name = "io_serviced", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats_cpu, serviced)), - .read_seq_string = blkcg_print_cpu_rwstat, - }, - { - .name = "io_service_time", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, service_time)), - .read_seq_string = blkcg_print_rwstat, - }, - { - .name = "io_wait_time", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, wait_time)), - .read_seq_string = blkcg_print_rwstat, - }, - { - .name = "io_merged", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, merged)), - .read_seq_string = blkcg_print_rwstat, - }, - { - .name = "io_queued", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, queued)), - .read_seq_string = blkcg_print_rwstat, - }, - { .name = "reset_stats", .write_u64 = blkiocg_reset_stats, }, -#ifdef CONFIG_BLK_DEV_THROTTLING - { - .name = "throttle.read_bps_device", - .private = offsetof(struct blkio_group_conf, bps[READ]), - .read_seq_string = blkcg_print_conf_u64, - .write_string = blkcg_set_conf_bps_r, - .max_write_len = 256, - }, - - { - .name = "throttle.write_bps_device", - .private = offsetof(struct blkio_group_conf, bps[WRITE]), - .read_seq_string = blkcg_print_conf_u64, - .write_string = blkcg_set_conf_bps_w, - .max_write_len = 256, - }, - - { - .name = "throttle.read_iops_device", - .private = offsetof(struct blkio_group_conf, iops[READ]), - .read_seq_string = blkcg_print_conf_u64, - .write_string = blkcg_set_conf_iops_r, - .max_write_len = 256, - }, - - { - .name = "throttle.write_iops_device", - .private = offsetof(struct blkio_group_conf, iops[WRITE]), - .read_seq_string = blkcg_print_conf_u64, - .write_string = blkcg_set_conf_iops_w, - .max_write_len = 256, - }, - { - .name = "throttle.io_service_bytes", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL, - offsetof(struct blkio_group_stats_cpu, service_bytes)), - .read_seq_string = blkcg_print_cpu_rwstat, - }, - { - .name = "throttle.io_serviced", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL, - offsetof(struct blkio_group_stats_cpu, serviced)), - .read_seq_string = blkcg_print_cpu_rwstat, - }, -#endif /* CONFIG_BLK_DEV_THROTTLING */ - -#ifdef CONFIG_DEBUG_BLK_CGROUP - { - .name = "avg_queue_size", - .read_seq_string = blkcg_print_avg_queue_size, - }, - { - .name = "group_wait_time", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, group_wait_time)), - .read_seq_string = blkcg_print_stat, - }, - { - .name = "idle_time", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, idle_time)), - .read_seq_string = blkcg_print_stat, - }, - { - .name = "empty_time", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, empty_time)), - .read_seq_string = blkcg_print_stat, - }, - { - .name = "dequeue", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, dequeue)), - .read_seq_string = blkcg_print_stat, - }, - { - .name = "unaccounted_time", - .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, - offsetof(struct blkio_group_stats, unaccounted_time)), - .read_seq_string = blkcg_print_stat, - }, -#endif { } /* terminate */ }; diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h index fa744d57bebb..ba64b2857571 100644 --- a/block/blk-cgroup.h +++ b/block/blk-cgroup.h @@ -156,24 +156,9 @@ struct blkio_group { }; typedef void (blkio_init_group_fn)(struct blkio_group *blkg); -typedef void (blkio_update_group_weight_fn)(struct request_queue *q, - struct blkio_group *blkg, unsigned int weight); -typedef void (blkio_update_group_read_bps_fn)(struct request_queue *q, - struct blkio_group *blkg, u64 read_bps); -typedef void (blkio_update_group_write_bps_fn)(struct request_queue *q, - struct blkio_group *blkg, u64 write_bps); -typedef void (blkio_update_group_read_iops_fn)(struct request_queue *q, - struct blkio_group *blkg, unsigned int read_iops); -typedef void (blkio_update_group_write_iops_fn)(struct request_queue *q, - struct blkio_group *blkg, unsigned int write_iops); struct blkio_policy_ops { blkio_init_group_fn *blkio_init_group_fn; - blkio_update_group_weight_fn *blkio_update_group_weight_fn; - blkio_update_group_read_bps_fn *blkio_update_group_read_bps_fn; - blkio_update_group_write_bps_fn *blkio_update_group_write_bps_fn; - blkio_update_group_read_iops_fn *blkio_update_group_read_iops_fn; - blkio_update_group_write_iops_fn *blkio_update_group_write_iops_fn; }; struct blkio_policy_type { diff --git a/block/blk-throttle.c b/block/blk-throttle.c index 1cc6c23de2c1..fb6f25778fb2 100644 --- a/block/blk-throttle.c +++ b/block/blk-throttle.c @@ -804,6 +804,11 @@ throtl_schedule_delayed_work(struct throtl_data *td, unsigned long delay) } } +/* + * Can not take queue lock in update functions as queue lock under + * blkcg_lock is not allowed. Under other paths we take blkcg_lock under + * queue_lock. + */ static void throtl_update_blkio_group_common(struct throtl_data *td, struct throtl_grp *tg) { @@ -813,51 +818,158 @@ static void throtl_update_blkio_group_common(struct throtl_data *td, throtl_schedule_delayed_work(td, 0); } -/* - * For all update functions, @q should be a valid pointer because these - * update functions are called under blkcg_lock, that means, blkg is - * valid and in turn @q is valid. queue exit path can not race because - * of blkcg_lock - * - * Can not take queue lock in update functions as queue lock under blkcg_lock - * is not allowed. Under other paths we take blkcg_lock under queue_lock. - */ -static void throtl_update_blkio_group_read_bps(struct request_queue *q, - struct blkio_group *blkg, u64 read_bps) +static u64 blkg_prfill_conf_u64(struct seq_file *sf, + struct blkg_policy_data *pd, int off) +{ + u64 v = *(u64 *)((void *)&pd->conf + off); + + if (!v) + return 0; + return __blkg_prfill_u64(sf, pd, v); +} + +static int blkcg_print_conf_u64(struct cgroup *cgrp, struct cftype *cft, + struct seq_file *sf) +{ + blkcg_print_blkgs(sf, cgroup_to_blkio_cgroup(cgrp), + blkg_prfill_conf_u64, BLKIO_POLICY_THROTL, + cft->private, false); + return 0; +} + +static void throtl_update_blkio_group_read_bps(struct blkio_group *blkg, + u64 read_bps) { struct throtl_grp *tg = blkg_to_tg(blkg); tg->bps[READ] = read_bps; - throtl_update_blkio_group_common(q->td, tg); + throtl_update_blkio_group_common(blkg->q->td, tg); } -static void throtl_update_blkio_group_write_bps(struct request_queue *q, - struct blkio_group *blkg, u64 write_bps) +static void throtl_update_blkio_group_write_bps(struct blkio_group *blkg, + u64 write_bps) { struct throtl_grp *tg = blkg_to_tg(blkg); tg->bps[WRITE] = write_bps; - throtl_update_blkio_group_common(q->td, tg); + throtl_update_blkio_group_common(blkg->q->td, tg); } -static void throtl_update_blkio_group_read_iops(struct request_queue *q, - struct blkio_group *blkg, unsigned int read_iops) +static void throtl_update_blkio_group_read_iops(struct blkio_group *blkg, + u64 read_iops) { struct throtl_grp *tg = blkg_to_tg(blkg); tg->iops[READ] = read_iops; - throtl_update_blkio_group_common(q->td, tg); + throtl_update_blkio_group_common(blkg->q->td, tg); } -static void throtl_update_blkio_group_write_iops(struct request_queue *q, - struct blkio_group *blkg, unsigned int write_iops) +static void throtl_update_blkio_group_write_iops(struct blkio_group *blkg, + u64 write_iops) { struct throtl_grp *tg = blkg_to_tg(blkg); tg->iops[WRITE] = write_iops; - throtl_update_blkio_group_common(q->td, tg); + throtl_update_blkio_group_common(blkg->q->td, tg); +} + +static int blkcg_set_conf_u64(struct cgroup *cgrp, struct cftype *cft, + const char *buf, + void (*update)(struct blkio_group *, u64)) +{ + struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); + struct blkg_policy_data *pd; + struct blkg_conf_ctx ctx; + int ret; + + ret = blkg_conf_prep(blkcg, buf, &ctx); + if (ret) + return ret; + + ret = -EINVAL; + pd = ctx.blkg->pd[BLKIO_POLICY_THROTL]; + if (pd) { + *(u64 *)((void *)&pd->conf + cft->private) = ctx.v; + update(ctx.blkg, ctx.v ?: -1); + ret = 0; + } + + blkg_conf_finish(&ctx); + return ret; } +static int blkcg_set_conf_bps_r(struct cgroup *cgrp, struct cftype *cft, + const char *buf) +{ + return blkcg_set_conf_u64(cgrp, cft, buf, + throtl_update_blkio_group_read_bps); +} + +static int blkcg_set_conf_bps_w(struct cgroup *cgrp, struct cftype *cft, + const char *buf) +{ + return blkcg_set_conf_u64(cgrp, cft, buf, + throtl_update_blkio_group_write_bps); +} + +static int blkcg_set_conf_iops_r(struct cgroup *cgrp, struct cftype *cft, + const char *buf) +{ + return blkcg_set_conf_u64(cgrp, cft, buf, + throtl_update_blkio_group_read_iops); +} + +static int blkcg_set_conf_iops_w(struct cgroup *cgrp, struct cftype *cft, + const char *buf) +{ + return blkcg_set_conf_u64(cgrp, cft, buf, + throtl_update_blkio_group_write_iops); +} + +static struct cftype throtl_files[] = { + { + .name = "throttle.read_bps_device", + .private = offsetof(struct blkio_group_conf, bps[READ]), + .read_seq_string = blkcg_print_conf_u64, + .write_string = blkcg_set_conf_bps_r, + .max_write_len = 256, + }, + { + .name = "throttle.write_bps_device", + .private = offsetof(struct blkio_group_conf, bps[WRITE]), + .read_seq_string = blkcg_print_conf_u64, + .write_string = blkcg_set_conf_bps_w, + .max_write_len = 256, + }, + { + .name = "throttle.read_iops_device", + .private = offsetof(struct blkio_group_conf, iops[READ]), + .read_seq_string = blkcg_print_conf_u64, + .write_string = blkcg_set_conf_iops_r, + .max_write_len = 256, + }, + { + .name = "throttle.write_iops_device", + .private = offsetof(struct blkio_group_conf, iops[WRITE]), + .read_seq_string = blkcg_print_conf_u64, + .write_string = blkcg_set_conf_iops_w, + .max_write_len = 256, + }, + { + .name = "throttle.io_service_bytes", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL, + offsetof(struct blkio_group_stats_cpu, service_bytes)), + .read_seq_string = blkcg_print_cpu_rwstat, + }, + { + .name = "throttle.io_serviced", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL, + offsetof(struct blkio_group_stats_cpu, serviced)), + .read_seq_string = blkcg_print_cpu_rwstat, + }, + { } /* terminate */ +}; + static void throtl_shutdown_wq(struct request_queue *q) { struct throtl_data *td = q->td; @@ -868,17 +980,10 @@ static void throtl_shutdown_wq(struct request_queue *q) static struct blkio_policy_type blkio_policy_throtl = { .ops = { .blkio_init_group_fn = throtl_init_blkio_group, - .blkio_update_group_read_bps_fn = - throtl_update_blkio_group_read_bps, - .blkio_update_group_write_bps_fn = - throtl_update_blkio_group_write_bps, - .blkio_update_group_read_iops_fn = - throtl_update_blkio_group_read_iops, - .blkio_update_group_write_iops_fn = - throtl_update_blkio_group_write_iops, }, .plid = BLKIO_POLICY_THROTL, .pdata_size = sizeof(struct throtl_grp), + .cftypes = throtl_files, }; bool blk_throtl_bio(struct request_queue *q, struct bio *bio) diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c index 8cca6161d0bc..119e061a7675 100644 --- a/block/cfq-iosched.c +++ b/block/cfq-iosched.c @@ -1058,8 +1058,7 @@ static void cfq_init_cfqg_base(struct cfq_group *cfqg) } #ifdef CONFIG_CFQ_GROUP_IOSCHED -static void cfq_update_blkio_group_weight(struct request_queue *q, - struct blkio_group *blkg, +static void cfq_update_blkio_group_weight(struct blkio_group *blkg, unsigned int weight) { struct cfq_group *cfqg = blkg_to_cfqg(blkg); @@ -1111,6 +1110,203 @@ static void cfq_link_cfqq_cfqg(struct cfq_queue *cfqq, struct cfq_group *cfqg) cfqg_get(cfqg); } +static u64 blkg_prfill_weight_device(struct seq_file *sf, + struct blkg_policy_data *pd, int off) +{ + if (!pd->conf.weight) + return 0; + return __blkg_prfill_u64(sf, pd, pd->conf.weight); +} + +static int blkcg_print_weight_device(struct cgroup *cgrp, struct cftype *cft, + struct seq_file *sf) +{ + blkcg_print_blkgs(sf, cgroup_to_blkio_cgroup(cgrp), + blkg_prfill_weight_device, BLKIO_POLICY_PROP, 0, + false); + return 0; +} + +static int blkcg_print_weight(struct cgroup *cgrp, struct cftype *cft, + struct seq_file *sf) +{ + seq_printf(sf, "%u\n", cgroup_to_blkio_cgroup(cgrp)->weight); + return 0; +} + +static int blkcg_set_weight_device(struct cgroup *cgrp, struct cftype *cft, + const char *buf) +{ + struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); + struct blkg_policy_data *pd; + struct blkg_conf_ctx ctx; + int ret; + + ret = blkg_conf_prep(blkcg, buf, &ctx); + if (ret) + return ret; + + ret = -EINVAL; + pd = ctx.blkg->pd[BLKIO_POLICY_PROP]; + if (pd && (!ctx.v || (ctx.v >= BLKIO_WEIGHT_MIN && + ctx.v <= BLKIO_WEIGHT_MAX))) { + pd->conf.weight = ctx.v; + cfq_update_blkio_group_weight(ctx.blkg, ctx.v ?: blkcg->weight); + ret = 0; + } + + blkg_conf_finish(&ctx); + return ret; +} + +static int blkcg_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val) +{ + struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); + struct blkio_group *blkg; + struct hlist_node *n; + + if (val < BLKIO_WEIGHT_MIN || val > BLKIO_WEIGHT_MAX) + return -EINVAL; + + spin_lock_irq(&blkcg->lock); + blkcg->weight = (unsigned int)val; + + hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node) { + struct blkg_policy_data *pd = blkg->pd[BLKIO_POLICY_PROP]; + + if (pd && !pd->conf.weight) + cfq_update_blkio_group_weight(blkg, blkcg->weight); + } + + spin_unlock_irq(&blkcg->lock); + return 0; +} + +#ifdef CONFIG_DEBUG_BLK_CGROUP +static u64 blkg_prfill_avg_queue_size(struct seq_file *sf, + struct blkg_policy_data *pd, int off) +{ + u64 samples = blkg_stat_read(&pd->stats.avg_queue_size_samples); + u64 v = 0; + + if (samples) { + v = blkg_stat_read(&pd->stats.avg_queue_size_sum); + do_div(v, samples); + } + __blkg_prfill_u64(sf, pd, v); + return 0; +} + +/* print avg_queue_size */ +static int blkcg_print_avg_queue_size(struct cgroup *cgrp, struct cftype *cft, + struct seq_file *sf) +{ + struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp); + + blkcg_print_blkgs(sf, blkcg, blkg_prfill_avg_queue_size, + BLKIO_POLICY_PROP, 0, false); + return 0; +} +#endif /* CONFIG_DEBUG_BLK_CGROUP */ + +static struct cftype cfq_blkcg_files[] = { + { + .name = "weight_device", + .read_seq_string = blkcg_print_weight_device, + .write_string = blkcg_set_weight_device, + .max_write_len = 256, + }, + { + .name = "weight", + .read_seq_string = blkcg_print_weight, + .write_u64 = blkcg_set_weight, + }, + { + .name = "time", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, time)), + .read_seq_string = blkcg_print_stat, + }, + { + .name = "sectors", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats_cpu, sectors)), + .read_seq_string = blkcg_print_cpu_stat, + }, + { + .name = "io_service_bytes", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats_cpu, service_bytes)), + .read_seq_string = blkcg_print_cpu_rwstat, + }, + { + .name = "io_serviced", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats_cpu, serviced)), + .read_seq_string = blkcg_print_cpu_rwstat, + }, + { + .name = "io_service_time", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, service_time)), + .read_seq_string = blkcg_print_rwstat, + }, + { + .name = "io_wait_time", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, wait_time)), + .read_seq_string = blkcg_print_rwstat, + }, + { + .name = "io_merged", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, merged)), + .read_seq_string = blkcg_print_rwstat, + }, + { + .name = "io_queued", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, queued)), + .read_seq_string = blkcg_print_rwstat, + }, +#ifdef CONFIG_DEBUG_BLK_CGROUP + { + .name = "avg_queue_size", + .read_seq_string = blkcg_print_avg_queue_size, + }, + { + .name = "group_wait_time", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, group_wait_time)), + .read_seq_string = blkcg_print_stat, + }, + { + .name = "idle_time", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, idle_time)), + .read_seq_string = blkcg_print_stat, + }, + { + .name = "empty_time", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, empty_time)), + .read_seq_string = blkcg_print_stat, + }, + { + .name = "dequeue", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, dequeue)), + .read_seq_string = blkcg_print_stat, + }, + { + .name = "unaccounted_time", + .private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP, + offsetof(struct blkio_group_stats, unaccounted_time)), + .read_seq_string = blkcg_print_stat, + }, +#endif /* CONFIG_DEBUG_BLK_CGROUP */ + { } /* terminate */ +}; #else /* GROUP_IOSCHED */ static struct cfq_group *cfq_lookup_create_cfqg(struct cfq_data *cfqd, struct blkio_cgroup *blkcg) @@ -3715,10 +3911,10 @@ static struct elevator_type iosched_cfq = { static struct blkio_policy_type blkio_policy_cfq = { .ops = { .blkio_init_group_fn = cfq_init_blkio_group, - .blkio_update_group_weight_fn = cfq_update_blkio_group_weight, }, .plid = BLKIO_POLICY_PROP, .pdata_size = sizeof(struct cfq_group), + .cftypes = cfq_blkcg_files, }; #endif |
