blkcg: drop BLKCG_STAT_{PRIV|POL|OFF} macros
Now that all stat handling code lives in policy implementations, there's no need to encode policy ID in cft->private. * Export blkcg_prfill_[rw]stat() from blkcg, remove blkcg_print_[rw]stat(), and implement cfqg_print_[rw]stat() which use hard-code BLKIO_POLICY_PROP. * Use cft->private for offset of the target field directly and drop BLKCG_STAT_{PRIV|POL|OFF}(). Signed-off-by: Tejun Heo <tj@kernel.org>
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@ -430,43 +430,35 @@ u64 __blkg_prfill_rwstat(struct seq_file *sf, void *pdata,
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return v;
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return v;
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}
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}
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static u64 blkg_prfill_stat(struct seq_file *sf, void *pdata, int off)
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/**
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* blkg_prfill_stat - prfill callback for blkg_stat
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* @sf: seq_file to print to
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* @pdata: policy private data of interest
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* @off: offset to the blkg_stat in @pdata
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*
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* prfill callback for printing a blkg_stat.
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*/
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u64 blkg_prfill_stat(struct seq_file *sf, void *pdata, int off)
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{
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{
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return __blkg_prfill_u64(sf, pdata, blkg_stat_read(pdata + off));
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return __blkg_prfill_u64(sf, pdata, blkg_stat_read(pdata + off));
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}
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}
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EXPORT_SYMBOL_GPL(blkg_prfill_stat);
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static u64 blkg_prfill_rwstat(struct seq_file *sf, void *pdata, int off)
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/**
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* blkg_prfill_rwstat - prfill callback for blkg_rwstat
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* @sf: seq_file to print to
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* @pdata: policy private data of interest
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* @off: offset to the blkg_rwstat in @pdata
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*
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* prfill callback for printing a blkg_rwstat.
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*/
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u64 blkg_prfill_rwstat(struct seq_file *sf, void *pdata, int off)
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{
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{
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struct blkg_rwstat rwstat = blkg_rwstat_read(pdata + off);
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struct blkg_rwstat rwstat = blkg_rwstat_read(pdata + off);
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return __blkg_prfill_rwstat(sf, pdata, &rwstat);
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return __blkg_prfill_rwstat(sf, pdata, &rwstat);
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}
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}
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EXPORT_SYMBOL_GPL(blkg_prfill_rwstat);
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/* print blkg_stat specified by BLKCG_STAT_PRIV() */
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int blkcg_print_stat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_stat,
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BLKCG_STAT_POL(cft->private),
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BLKCG_STAT_OFF(cft->private), false);
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return 0;
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}
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EXPORT_SYMBOL_GPL(blkcg_print_stat);
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/* print blkg_rwstat specified by BLKCG_STAT_PRIV() */
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int blkcg_print_rwstat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_rwstat,
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BLKCG_STAT_POL(cft->private),
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BLKCG_STAT_OFF(cft->private), true);
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return 0;
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}
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EXPORT_SYMBOL_GPL(blkcg_print_rwstat);
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/**
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/**
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* blkg_conf_prep - parse and prepare for per-blkg config update
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* blkg_conf_prep - parse and prepare for per-blkg config update
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@ -34,11 +34,6 @@ enum blkio_policy_id {
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#define CFQ_WEIGHT_MAX 1000
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#define CFQ_WEIGHT_MAX 1000
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#define CFQ_WEIGHT_DEFAULT 500
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#define CFQ_WEIGHT_DEFAULT 500
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/* cft->private [un]packing for stat printing */
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#define BLKCG_STAT_PRIV(pol, off) (((unsigned)(pol) << 16) | (off))
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#define BLKCG_STAT_POL(prv) ((unsigned)(prv) >> 16)
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#define BLKCG_STAT_OFF(prv) ((unsigned)(prv) & 0xffff)
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enum blkg_rwstat_type {
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enum blkg_rwstat_type {
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BLKG_RWSTAT_READ,
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BLKG_RWSTAT_READ,
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BLKG_RWSTAT_WRITE,
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BLKG_RWSTAT_WRITE,
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@ -131,10 +126,8 @@ void blkcg_print_blkgs(struct seq_file *sf, struct blkio_cgroup *blkcg,
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u64 __blkg_prfill_u64(struct seq_file *sf, void *pdata, u64 v);
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u64 __blkg_prfill_u64(struct seq_file *sf, void *pdata, u64 v);
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u64 __blkg_prfill_rwstat(struct seq_file *sf, void *pdata,
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u64 __blkg_prfill_rwstat(struct seq_file *sf, void *pdata,
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const struct blkg_rwstat *rwstat);
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const struct blkg_rwstat *rwstat);
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int blkcg_print_stat(struct cgroup *cgrp, struct cftype *cft,
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u64 blkg_prfill_stat(struct seq_file *sf, void *pdata, int off);
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struct seq_file *sf);
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u64 blkg_prfill_rwstat(struct seq_file *sf, void *pdata, int off);
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int blkcg_print_rwstat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf);
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struct blkg_conf_ctx {
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struct blkg_conf_ctx {
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struct gendisk *disk;
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struct gendisk *disk;
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@ -941,15 +941,13 @@ static u64 tg_prfill_cpu_rwstat(struct seq_file *sf, void *pdata, int off)
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return __blkg_prfill_rwstat(sf, pdata, &rwstat);
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return __blkg_prfill_rwstat(sf, pdata, &rwstat);
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}
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}
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/* print per-cpu blkg_rwstat specified by BLKCG_STAT_PRIV() */
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static int tg_print_cpu_rwstat(struct cgroup *cgrp, struct cftype *cft,
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static int tg_print_cpu_rwstat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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struct seq_file *sf)
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{
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, tg_prfill_cpu_rwstat,
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blkcg_print_blkgs(sf, blkcg, tg_prfill_cpu_rwstat, BLKIO_POLICY_THROTL,
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BLKCG_STAT_POL(cft->private),
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cft->private, true);
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BLKCG_STAT_OFF(cft->private), true);
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return 0;
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return 0;
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}
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}
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@ -1067,14 +1065,12 @@ static struct cftype throtl_files[] = {
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},
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},
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{
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{
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.name = "throttle.io_service_bytes",
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.name = "throttle.io_service_bytes",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL,
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.private = offsetof(struct tg_stats_cpu, service_bytes),
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offsetof(struct tg_stats_cpu, service_bytes)),
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.read_seq_string = tg_print_cpu_rwstat,
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.read_seq_string = tg_print_cpu_rwstat,
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},
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},
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{
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{
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.name = "throttle.io_serviced",
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.name = "throttle.io_serviced",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_THROTL,
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.private = offsetof(struct tg_stats_cpu, serviced),
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offsetof(struct tg_stats_cpu, serviced)),
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.read_seq_string = tg_print_cpu_rwstat,
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.read_seq_string = tg_print_cpu_rwstat,
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},
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},
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{ } /* terminate */
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{ } /* terminate */
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@ -1441,6 +1441,26 @@ static int cfq_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val)
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return 0;
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return 0;
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}
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}
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static int cfqg_print_stat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_stat, BLKIO_POLICY_PROP,
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cft->private, false);
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return 0;
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}
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static int cfqg_print_rwstat(struct cgroup *cgrp, struct cftype *cft,
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struct seq_file *sf)
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{
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struct blkio_cgroup *blkcg = cgroup_to_blkio_cgroup(cgrp);
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blkcg_print_blkgs(sf, blkcg, blkg_prfill_rwstat, BLKIO_POLICY_PROP,
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cft->private, true);
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return 0;
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}
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#ifdef CONFIG_DEBUG_BLK_CGROUP
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#ifdef CONFIG_DEBUG_BLK_CGROUP
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static u64 cfqg_prfill_avg_queue_size(struct seq_file *sf, void *pdata, int off)
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static u64 cfqg_prfill_avg_queue_size(struct seq_file *sf, void *pdata, int off)
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{
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{
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@ -1482,51 +1502,43 @@ static struct cftype cfq_blkcg_files[] = {
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},
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},
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{
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{
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.name = "time",
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.name = "time",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.time),
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offsetof(struct cfq_group, stats.time)),
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.read_seq_string = cfqg_print_stat,
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.read_seq_string = blkcg_print_stat,
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},
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},
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{
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{
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.name = "sectors",
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.name = "sectors",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.sectors),
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offsetof(struct cfq_group, stats.sectors)),
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.read_seq_string = cfqg_print_stat,
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.read_seq_string = blkcg_print_stat,
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},
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},
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{
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{
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.name = "io_service_bytes",
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.name = "io_service_bytes",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.service_bytes),
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offsetof(struct cfq_group, stats.service_bytes)),
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.read_seq_string = cfqg_print_rwstat,
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.read_seq_string = blkcg_print_rwstat,
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},
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},
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{
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{
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.name = "io_serviced",
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.name = "io_serviced",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.serviced),
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offsetof(struct cfq_group, stats.serviced)),
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.read_seq_string = cfqg_print_rwstat,
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.read_seq_string = blkcg_print_rwstat,
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},
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},
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{
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{
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.name = "io_service_time",
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.name = "io_service_time",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.service_time),
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offsetof(struct cfq_group, stats.service_time)),
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.read_seq_string = cfqg_print_rwstat,
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.read_seq_string = blkcg_print_rwstat,
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},
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},
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{
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{
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.name = "io_wait_time",
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.name = "io_wait_time",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.wait_time),
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offsetof(struct cfq_group, stats.wait_time)),
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.read_seq_string = cfqg_print_rwstat,
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.read_seq_string = blkcg_print_rwstat,
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},
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},
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{
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{
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.name = "io_merged",
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.name = "io_merged",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.merged),
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offsetof(struct cfq_group, stats.merged)),
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.read_seq_string = cfqg_print_rwstat,
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.read_seq_string = blkcg_print_rwstat,
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},
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},
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{
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{
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.name = "io_queued",
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.name = "io_queued",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.queued),
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offsetof(struct cfq_group, stats.queued)),
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.read_seq_string = cfqg_print_rwstat,
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.read_seq_string = blkcg_print_rwstat,
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},
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},
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#ifdef CONFIG_DEBUG_BLK_CGROUP
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#ifdef CONFIG_DEBUG_BLK_CGROUP
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{
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{
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@ -1535,33 +1547,28 @@ static struct cftype cfq_blkcg_files[] = {
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},
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},
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{
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{
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.name = "group_wait_time",
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.name = "group_wait_time",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.group_wait_time),
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offsetof(struct cfq_group, stats.group_wait_time)),
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.read_seq_string = cfqg_print_stat,
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.read_seq_string = blkcg_print_stat,
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},
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},
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{
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{
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.name = "idle_time",
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.name = "idle_time",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.idle_time),
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offsetof(struct cfq_group, stats.idle_time)),
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.read_seq_string = cfqg_print_stat,
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.read_seq_string = blkcg_print_stat,
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},
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},
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{
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{
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.name = "empty_time",
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.name = "empty_time",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.empty_time),
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offsetof(struct cfq_group, stats.empty_time)),
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.read_seq_string = cfqg_print_stat,
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.read_seq_string = blkcg_print_stat,
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},
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},
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{
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{
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.name = "dequeue",
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.name = "dequeue",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.dequeue),
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offsetof(struct cfq_group, stats.dequeue)),
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.read_seq_string = cfqg_print_stat,
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.read_seq_string = blkcg_print_stat,
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},
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},
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{
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{
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.name = "unaccounted_time",
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.name = "unaccounted_time",
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.private = BLKCG_STAT_PRIV(BLKIO_POLICY_PROP,
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.private = offsetof(struct cfq_group, stats.unaccounted_time),
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offsetof(struct cfq_group, stats.unaccounted_time)),
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.read_seq_string = cfqg_print_stat,
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.read_seq_string = blkcg_print_stat,
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},
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},
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#endif /* CONFIG_DEBUG_BLK_CGROUP */
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#endif /* CONFIG_DEBUG_BLK_CGROUP */
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{ } /* terminate */
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{ } /* terminate */
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