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-rw-r--r--block/blk-cgroup.c156
-rw-r--r--block/blk-cgroup.h3
2 files changed, 55 insertions, 104 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 13cae77e8bf6..a9723a8dc983 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -1115,95 +1115,28 @@ static int blkiocg_file_write(struct cgroup *cgrp, struct cftype *cft,
return ret;
}
-static void blkio_print_group_conf(struct cftype *cft, struct blkio_group *blkg,
- struct seq_file *m)
+/* for propio conf */
+static u64 blkg_prfill_weight_device(struct seq_file *sf,
+ struct blkg_policy_data *pd, int off)
{
- int plid = BLKIOFILE_POLICY(cft->private);
- int fileid = BLKIOFILE_ATTR(cft->private);
- struct blkg_policy_data *pd = blkg->pd[plid];
- const char *dname = blkg_dev_name(blkg);
- int rw = WRITE;
-
- if (!dname)
- return;
-
- switch (plid) {
- case BLKIO_POLICY_PROP:
- if (pd->conf.weight)
- seq_printf(m, "%s\t%u\n",
- dname, pd->conf.weight);
- break;
- case BLKIO_POLICY_THROTL:
- switch (fileid) {
- case BLKIO_THROTL_read_bps_device:
- rw = READ;
- case BLKIO_THROTL_write_bps_device:
- if (pd->conf.bps[rw])
- seq_printf(m, "%s\t%llu\n",
- dname, pd->conf.bps[rw]);
- break;
- case BLKIO_THROTL_read_iops_device:
- rw = READ;
- case BLKIO_THROTL_write_iops_device:
- if (pd->conf.iops[rw])
- seq_printf(m, "%s\t%u\n",
- dname, pd->conf.iops[rw]);
- break;
- }
- break;
- default:
- BUG();
- }
+ if (!pd->conf.weight)
+ return 0;
+ return __blkg_prfill_u64(sf, pd, pd->conf.weight);
}
-/* cgroup files which read their data from policy nodes end up here */
-static void blkio_read_conf(struct cftype *cft, struct blkio_cgroup *blkcg,
- struct seq_file *m)
+static int blkcg_print_weight_device(struct cgroup *cgrp, struct cftype *cft,
+ struct seq_file *sf)
{
- struct blkio_group *blkg;
- struct hlist_node *n;
-
- spin_lock_irq(&blkcg->lock);
- hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node)
- blkio_print_group_conf(cft, blkg, m);
- spin_unlock_irq(&blkcg->lock);
+ blkcg_print_blkgs(sf, cgroup_to_blkio_cgroup(cgrp),
+ blkg_prfill_weight_device, BLKIO_POLICY_PROP, 0,
+ false);
+ return 0;
}
-static int blkiocg_file_read(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *m)
+static int blkcg_print_weight(struct cgroup *cgrp, struct cftype *cft,
+ struct seq_file *sf)
{
- struct blkio_cgroup *blkcg;
- enum blkio_policy_id plid = BLKIOFILE_POLICY(cft->private);
- int name = BLKIOFILE_ATTR(cft->private);
-
- blkcg = cgroup_to_blkio_cgroup(cgrp);
-
- switch(plid) {
- case BLKIO_POLICY_PROP:
- switch(name) {
- case BLKIO_PROP_weight_device:
- blkio_read_conf(cft, blkcg, m);
- return 0;
- default:
- BUG();
- }
- break;
- case BLKIO_POLICY_THROTL:
- switch(name){
- case BLKIO_THROTL_read_bps_device:
- case BLKIO_THROTL_write_bps_device:
- case BLKIO_THROTL_read_iops_device:
- case BLKIO_THROTL_write_iops_device:
- blkio_read_conf(cft, blkcg, m);
- return 0;
- default:
- BUG();
- }
- break;
- default:
- BUG();
- }
-
+ seq_printf(sf, "%u\n", cgroup_to_blkio_cgroup(cgrp)->weight);
return 0;
}
@@ -1233,40 +1166,59 @@ static int blkcg_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val)
return 0;
}
-static u64 blkiocg_file_read_u64 (struct cgroup *cgrp, struct cftype *cft) {
- struct blkio_cgroup *blkcg;
- enum blkio_policy_id plid = BLKIOFILE_POLICY(cft->private);
- int name = BLKIOFILE_ATTR(cft->private);
+/* 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);
- blkcg = cgroup_to_blkio_cgroup(cgrp);
+ if (!v)
+ return 0;
+ return __blkg_prfill_u64(sf, pd, v);
+}
- switch(plid) {
- case BLKIO_POLICY_PROP:
- switch(name) {
- case BLKIO_PROP_weight:
- return (u64)blkcg->weight;
- }
+static int blkcg_print_conf_u64(struct cgroup *cgrp, struct cftype *cft,
+ struct seq_file *sf)
+{
+ int off;
+
+ switch (BLKIOFILE_ATTR(cft->private)) {
+ case BLKIO_THROTL_read_bps_device:
+ off = offsetof(struct blkio_group_conf, bps[READ]);
+ break;
+ case BLKIO_THROTL_write_bps_device:
+ off = offsetof(struct blkio_group_conf, bps[WRITE]);
+ break;
+ case BLKIO_THROTL_read_iops_device:
+ off = offsetof(struct blkio_group_conf, iops[READ]);
+ break;
+ case BLKIO_THROTL_write_iops_device:
+ off = offsetof(struct blkio_group_conf, iops[WRITE]);
break;
default:
- BUG();
+ return -EINVAL;
}
+
+ blkcg_print_blkgs(sf, cgroup_to_blkio_cgroup(cgrp),
+ blkg_prfill_conf_u64, BLKIO_POLICY_THROTL,
+ off, false);
return 0;
}
+#endif
struct cftype blkio_files[] = {
{
.name = "weight_device",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
BLKIO_PROP_weight_device),
- .read_seq_string = blkiocg_file_read,
+ .read_seq_string = blkcg_print_weight_device,
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
{
.name = "weight",
- .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
- BLKIO_PROP_weight),
- .read_u64 = blkiocg_file_read_u64,
+ .read_seq_string = blkcg_print_weight,
.write_u64 = blkcg_set_weight,
},
{
@@ -1326,7 +1278,7 @@ struct cftype blkio_files[] = {
.name = "throttle.read_bps_device",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
BLKIO_THROTL_read_bps_device),
- .read_seq_string = blkiocg_file_read,
+ .read_seq_string = blkcg_print_conf_u64,
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
@@ -1335,7 +1287,7 @@ struct cftype blkio_files[] = {
.name = "throttle.write_bps_device",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
BLKIO_THROTL_write_bps_device),
- .read_seq_string = blkiocg_file_read,
+ .read_seq_string = blkcg_print_conf_u64,
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
@@ -1344,7 +1296,7 @@ struct cftype blkio_files[] = {
.name = "throttle.read_iops_device",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
BLKIO_THROTL_read_iops_device),
- .read_seq_string = blkiocg_file_read,
+ .read_seq_string = blkcg_print_conf_u64,
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
@@ -1353,7 +1305,7 @@ struct cftype blkio_files[] = {
.name = "throttle.write_iops_device",
.private = BLKIOFILE_PRIVATE(BLKIO_POLICY_THROTL,
BLKIO_THROTL_write_iops_device),
- .read_seq_string = blkiocg_file_read,
+ .read_seq_string = blkcg_print_conf_u64,
.write_string = blkiocg_file_write,
.max_write_len = 256,
},
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 7331d7965a5e..b67eefa706c3 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -52,7 +52,6 @@ enum blkg_state_flags {
/* cgroup files owned by proportional weight policy */
enum blkcg_file_name_prop {
- BLKIO_PROP_weight = 1,
BLKIO_PROP_weight_device,
};
@@ -130,7 +129,7 @@ struct blkio_group_stats_cpu {
struct blkio_group_conf {
unsigned int weight;
- unsigned int iops[2];
+ u64 iops[2];
u64 bps[2];
};
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.