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-rw-r--r--block/blk-cgroup.c544
-rw-r--r--block/blk-cgroup.h36
-rw-r--r--block/cfq-iosched.c1
-rw-r--r--block/cfq.h2
4 files changed, 429 insertions, 154 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index c1a39d9..7762987 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -37,6 +37,12 @@ static void blkiocg_attach(struct cgroup_subsys *, struct cgroup *,
static void blkiocg_destroy(struct cgroup_subsys *, struct cgroup *);
static int blkiocg_populate(struct cgroup_subsys *, struct cgroup *);
+/* for encoding cft->private value on file */
+#define BLKIOFILE_PRIVATE(x, val) (((x) << 16) | (val))
+/* What policy owns the file, proportional or throttle */
+#define BLKIOFILE_POLICY(val) (((val) >> 16) & 0xffff)
+#define BLKIOFILE_ATTR(val) ((val) & 0xffff)
+
struct cgroup_subsys blkio_subsys = {
.name = "blkio",
.create = blkiocg_create,
@@ -59,6 +65,27 @@ static inline void blkio_policy_insert_node(struct blkio_cgroup *blkcg,
list_add(&pn->node, &blkcg->policy_list);
}
+static inline bool cftype_blkg_same_policy(struct cftype *cft,
+ struct blkio_group *blkg)
+{
+ enum blkio_policy_id plid = BLKIOFILE_POLICY(cft->private);
+
+ if (blkg->plid == plid)
+ return 1;
+
+ return 0;
+}
+
+/* Determines if policy node matches cgroup file being accessed */
+static inline bool pn_matches_cftype(struct cftype *cft,
+ struct blkio_policy_node *pn)
+{
+ enum blkio_policy_id plid = BLKIOFILE_POLICY(cft->private);
+ int fileid = BLKIOFILE_ATTR(cft->private);
+
+ return (plid == pn->plid && fileid == pn->fileid);
+}
+
/* Must be called with blkcg->lock held */
static inline void blkio_policy_delete_node(struct blkio_policy_node *pn)
{
@@ -67,12 +94,13 @@ static inline void blkio_policy_delete_node(struct blkio_policy_node *pn)
/* Must be called with blkcg->lock held */
static struct blkio_policy_node *
-blkio_policy_search_node(const struct blkio_cgroup *blkcg, dev_t dev)
+blkio_policy_search_node(const struct blkio_cgroup *blkcg, dev_t dev,
+ enum blkio_policy_id plid, int fileid)
{
struct blkio_policy_node *pn;
list_for_each_entry(pn, &blkcg->policy_list, node) {
- if (pn->dev == dev)
+ if (pn->dev == dev && pn->plid == plid && pn->fileid == fileid)
return pn;
}
@@ -86,6 +114,20 @@ struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup)
}
EXPORT_SYMBOL_GPL(cgroup_to_blkio_cgroup);
+static inline void
+blkio_update_group_weight(struct blkio_group *blkg, 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 != blkg->plid)
+ continue;
+ if (blkiop->ops.blkio_update_group_weight_fn)
+ blkiop->ops.blkio_update_group_weight_fn(blkg, weight);
+ }
+}
+
/*
* Add to the appropriate stat variable depending on the request type.
* This should be called with the blkg->stats_lock held.
@@ -341,7 +383,8 @@ void blkiocg_update_io_merged_stats(struct blkio_group *blkg, bool direction,
EXPORT_SYMBOL_GPL(blkiocg_update_io_merged_stats);
void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
- struct blkio_group *blkg, void *key, dev_t dev)
+ struct blkio_group *blkg, void *key, dev_t dev,
+ enum blkio_policy_id plid)
{
unsigned long flags;
@@ -350,6 +393,7 @@ void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
rcu_assign_pointer(blkg->key, key);
blkg->blkcg_id = css_id(&blkcg->css);
hlist_add_head_rcu(&blkg->blkcg_node, &blkcg->blkg_list);
+ blkg->plid = plid;
spin_unlock_irqrestore(&blkcg->lock, flags);
/* Need to take css reference ? */
cgroup_path(blkcg->css.cgroup, blkg->path, sizeof(blkg->path));
@@ -408,51 +452,6 @@ struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg, void *key)
}
EXPORT_SYMBOL_GPL(blkiocg_lookup_group);
-#define SHOW_FUNCTION(__VAR) \
-static u64 blkiocg_##__VAR##_read(struct cgroup *cgroup, \
- struct cftype *cftype) \
-{ \
- struct blkio_cgroup *blkcg; \
- \
- blkcg = cgroup_to_blkio_cgroup(cgroup); \
- return (u64)blkcg->__VAR; \
-}
-
-SHOW_FUNCTION(weight);
-#undef SHOW_FUNCTION
-
-static int
-blkiocg_weight_write(struct cgroup *cgroup, struct cftype *cftype, u64 val)
-{
- struct blkio_cgroup *blkcg;
- struct blkio_group *blkg;
- struct hlist_node *n;
- struct blkio_policy_type *blkiop;
- struct blkio_policy_node *pn;
-
- if (val < BLKIO_WEIGHT_MIN || val > BLKIO_WEIGHT_MAX)
- return -EINVAL;
-
- blkcg = cgroup_to_blkio_cgroup(cgroup);
- 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) {
- pn = blkio_policy_search_node(blkcg, blkg->dev);
-
- if (pn)
- continue;
-
- list_for_each_entry(blkiop, &blkio_list, list)
- blkiop->ops.blkio_update_group_weight_fn(blkg,
- blkcg->weight);
- }
- spin_unlock_irq(&blkcg->lock);
- spin_unlock(&blkio_list_lock);
- return 0;
-}
-
static int
blkiocg_reset_stats(struct cgroup *cgroup, struct cftype *cftype, u64 val)
{
@@ -593,52 +592,6 @@ static uint64_t blkio_get_stat(struct blkio_group *blkg,
return disk_total;
}
-#define SHOW_FUNCTION_PER_GROUP(__VAR, type, show_total) \
-static int blkiocg_##__VAR##_read(struct cgroup *cgroup, \
- struct cftype *cftype, struct cgroup_map_cb *cb) \
-{ \
- struct blkio_cgroup *blkcg; \
- struct blkio_group *blkg; \
- struct hlist_node *n; \
- uint64_t cgroup_total = 0; \
- \
- if (!cgroup_lock_live_group(cgroup)) \
- return -ENODEV; \
- \
- blkcg = cgroup_to_blkio_cgroup(cgroup); \
- rcu_read_lock(); \
- hlist_for_each_entry_rcu(blkg, n, &blkcg->blkg_list, blkcg_node) {\
- if (blkg->dev) { \
- spin_lock_irq(&blkg->stats_lock); \
- cgroup_total += blkio_get_stat(blkg, cb, \
- blkg->dev, type); \
- spin_unlock_irq(&blkg->stats_lock); \
- } \
- } \
- if (show_total) \
- cb->fill(cb, "Total", cgroup_total); \
- rcu_read_unlock(); \
- cgroup_unlock(); \
- return 0; \
-}
-
-SHOW_FUNCTION_PER_GROUP(time, BLKIO_STAT_TIME, 0);
-SHOW_FUNCTION_PER_GROUP(sectors, BLKIO_STAT_SECTORS, 0);
-SHOW_FUNCTION_PER_GROUP(io_service_bytes, BLKIO_STAT_SERVICE_BYTES, 1);
-SHOW_FUNCTION_PER_GROUP(io_serviced, BLKIO_STAT_SERVICED, 1);
-SHOW_FUNCTION_PER_GROUP(io_service_time, BLKIO_STAT_SERVICE_TIME, 1);
-SHOW_FUNCTION_PER_GROUP(io_wait_time, BLKIO_STAT_WAIT_TIME, 1);
-SHOW_FUNCTION_PER_GROUP(io_merged, BLKIO_STAT_MERGED, 1);
-SHOW_FUNCTION_PER_GROUP(io_queued, BLKIO_STAT_QUEUED, 1);
-#ifdef CONFIG_DEBUG_BLK_CGROUP
-SHOW_FUNCTION_PER_GROUP(dequeue, BLKIO_STAT_DEQUEUE, 0);
-SHOW_FUNCTION_PER_GROUP(avg_queue_size, BLKIO_STAT_AVG_QUEUE_SIZE, 0);
-SHOW_FUNCTION_PER_GROUP(group_wait_time, BLKIO_STAT_GROUP_WAIT_TIME, 0);
-SHOW_FUNCTION_PER_GROUP(idle_time, BLKIO_STAT_IDLE_TIME, 0);
-SHOW_FUNCTION_PER_GROUP(empty_time, BLKIO_STAT_EMPTY_TIME, 0);
-#endif
-#undef SHOW_FUNCTION_PER_GROUP
-
static int blkio_check_dev_num(dev_t dev)
{
int part = 0;
@@ -652,7 +605,7 @@ static int blkio_check_dev_num(dev_t dev)
}
static int blkio_policy_parse_and_set(char *buf,
- struct blkio_policy_node *newpn)
+ struct blkio_policy_node *newpn, enum blkio_policy_id plid, int fileid)
{
char *s[4], *p, *major_s = NULL, *minor_s = NULL;
int ret;
@@ -705,12 +658,20 @@ static int blkio_policy_parse_and_set(char *buf,
if (s[1] == NULL)
return -EINVAL;
- ret = strict_strtoul(s[1], 10, &temp);
- if (ret || (temp < BLKIO_WEIGHT_MIN && temp > 0) ||
- temp > BLKIO_WEIGHT_MAX)
- return -EINVAL;
+ switch (plid) {
+ case BLKIO_POLICY_PROP:
+ ret = strict_strtoul(s[1], 10, &temp);
+ if (ret || (temp < BLKIO_WEIGHT_MIN && temp > 0) ||
+ temp > BLKIO_WEIGHT_MAX)
+ return -EINVAL;
- newpn->weight = temp;
+ newpn->plid = plid;
+ newpn->fileid = fileid;
+ newpn->weight = temp;
+ break;
+ default:
+ BUG();
+ }
return 0;
}
@@ -720,7 +681,8 @@ unsigned int blkcg_get_weight(struct blkio_cgroup *blkcg,
{
struct blkio_policy_node *pn;
- pn = blkio_policy_search_node(blkcg, dev);
+ pn = blkio_policy_search_node(blkcg, dev, BLKIO_POLICY_PROP,
+ BLKIO_PROP_weight_device);
if (pn)
return pn->weight;
else
@@ -728,18 +690,86 @@ unsigned int blkcg_get_weight(struct blkio_cgroup *blkcg,
}
EXPORT_SYMBOL_GPL(blkcg_get_weight);
+/* Checks whether user asked for deleting a policy rule */
+static bool blkio_delete_rule_command(struct blkio_policy_node *pn)
+{
+ switch(pn->plid) {
+ case BLKIO_POLICY_PROP:
+ if (pn->weight == 0)
+ return 1;
+ break;
+ default:
+ BUG();
+ }
+
+ return 0;
+}
+
+static void blkio_update_policy_rule(struct blkio_policy_node *oldpn,
+ struct blkio_policy_node *newpn)
+{
+ switch(oldpn->plid) {
+ case BLKIO_POLICY_PROP:
+ oldpn->weight = newpn->weight;
+ break;
+ default:
+ BUG();
+ }
+}
+
+/*
+ * Some rules/values in blkg have changed. Propogate those to respective
+ * policies.
+ */
+static void blkio_update_blkg_policy(struct blkio_cgroup *blkcg,
+ struct blkio_group *blkg, struct blkio_policy_node *pn)
+{
+ unsigned int weight;
+
+ switch(pn->plid) {
+ case BLKIO_POLICY_PROP:
+ weight = pn->weight ? pn->weight :
+ blkcg->weight;
+ blkio_update_group_weight(blkg, weight);
+ break;
+ default:
+ BUG();
+ }
+}
-static int blkiocg_weight_device_write(struct cgroup *cgrp, struct cftype *cft,
- const char *buffer)
+/*
+ * A policy node rule has been updated. Propogate this update to all the
+ * block groups which might be affected by this update.
+ */
+static void blkio_update_policy_node_blkg(struct blkio_cgroup *blkcg,
+ struct blkio_policy_node *pn)
+{
+ struct blkio_group *blkg;
+ struct hlist_node *n;
+
+ spin_lock(&blkio_list_lock);
+ spin_lock_irq(&blkcg->lock);
+
+ hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node) {
+ if (pn->dev != blkg->dev || pn->plid != blkg->plid)
+ continue;
+ blkio_update_blkg_policy(blkcg, blkg, pn);
+ }
+
+ spin_unlock_irq(&blkcg->lock);
+ spin_unlock(&blkio_list_lock);
+}
+
+static int blkiocg_file_write(struct cgroup *cgrp, struct cftype *cft,
+ const char *buffer)
{
int ret = 0;
char *buf;
struct blkio_policy_node *newpn, *pn;
struct blkio_cgroup *blkcg;
- struct blkio_group *blkg;
int keep_newpn = 0;
- struct hlist_node *n;
- struct blkio_policy_type *blkiop;
+ enum blkio_policy_id plid = BLKIOFILE_POLICY(cft->private);
+ int fileid = BLKIOFILE_ATTR(cft->private);
buf = kstrdup(buffer, GFP_KERNEL);
if (!buf)
@@ -751,7 +781,7 @@ static int blkiocg_weight_device_write(struct cgroup *cgrp, struct cftype *cft,
goto free_buf;
}
- ret = blkio_policy_parse_and_set(buf, newpn);
+ ret = blkio_policy_parse_and_set(buf, newpn, plid, fileid);
if (ret)
goto free_newpn;
@@ -759,9 +789,9 @@ static int blkiocg_weight_device_write(struct cgroup *cgrp, struct cftype *cft,
spin_lock_irq(&blkcg->lock);
- pn = blkio_policy_search_node(blkcg, newpn->dev);
+ pn = blkio_policy_search_node(blkcg, newpn->dev, plid, fileid);
if (!pn) {
- if (newpn->weight != 0) {
+ if (!blkio_delete_rule_command(newpn)) {
blkio_policy_insert_node(blkcg, newpn);
keep_newpn = 1;
}
@@ -769,33 +799,17 @@ static int blkiocg_weight_device_write(struct cgroup *cgrp, struct cftype *cft,
goto update_io_group;
}
- if (newpn->weight == 0) {
- /* weight == 0 means deleteing a specific weight */
+ if (blkio_delete_rule_command(newpn)) {
blkio_policy_delete_node(pn);
spin_unlock_irq(&blkcg->lock);
goto update_io_group;
}
spin_unlock_irq(&blkcg->lock);
- pn->weight = newpn->weight;
+ blkio_update_policy_rule(pn, newpn);
update_io_group:
- /* update weight for each cfqg */
- spin_lock(&blkio_list_lock);
- spin_lock_irq(&blkcg->lock);
-
- hlist_for_each_entry(blkg, n, &blkcg->blkg_list, blkcg_node) {
- if (newpn->dev == blkg->dev) {
- list_for_each_entry(blkiop, &blkio_list, list)
- blkiop->ops.blkio_update_group_weight_fn(blkg,
- newpn->weight ?
- newpn->weight :
- blkcg->weight);
- }
- }
-
- spin_unlock_irq(&blkcg->lock);
- spin_unlock(&blkio_list_lock);
+ blkio_update_policy_node_blkg(blkcg, newpn);
free_newpn:
if (!keep_newpn)
@@ -805,21 +819,219 @@ free_buf:
return ret;
}
-static int blkiocg_weight_device_read(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *m)
+static void
+blkio_print_policy_node(struct seq_file *m, struct blkio_policy_node *pn)
+{
+ switch(pn->plid) {
+ case BLKIO_POLICY_PROP:
+ if (pn->fileid == BLKIO_PROP_weight_device)
+ seq_printf(m, "%u:%u\t%u\n", MAJOR(pn->dev),
+ MINOR(pn->dev), pn->weight);
+ break;
+ default:
+ BUG();
+ }
+}
+
+/* cgroup files which read their data from policy nodes end up here */
+static void blkio_read_policy_node_files(struct cftype *cft,
+ struct blkio_cgroup *blkcg, struct seq_file *m)
{
- struct blkio_cgroup *blkcg;
struct blkio_policy_node *pn;
- blkcg = cgroup_to_blkio_cgroup(cgrp);
if (!list_empty(&blkcg->policy_list)) {
spin_lock_irq(&blkcg->lock);
list_for_each_entry(pn, &blkcg->policy_list, node) {
- seq_printf(m, "%u:%u\t%u\n", MAJOR(pn->dev),
- MINOR(pn->dev), pn->weight);
+ if (!pn_matches_cftype(cft, pn))
+ continue;
+ blkio_print_policy_node(m, pn);
}
spin_unlock_irq(&blkcg->lock);
}
+}
+
+static int blkiocg_file_read(struct cgroup *cgrp, struct cftype *cft,
+ struct seq_file *m)
+{
+ 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_policy_node_files(cft, blkcg, m);
+ return 0;
+ default:
+ BUG();
+ }
+ break;
+ default:
+ BUG();
+ }
+
+ return 0;
+}
+
+static int blkio_read_blkg_stats(struct blkio_cgroup *blkcg,
+ struct cftype *cft, struct cgroup_map_cb *cb, enum stat_type type,
+ bool show_total)
+{
+ struct blkio_group *blkg;
+ struct hlist_node *n;
+ uint64_t cgroup_total = 0;
+
+ rcu_read_lock();
+ hlist_for_each_entry_rcu(blkg, n, &blkcg->blkg_list, blkcg_node) {
+ if (blkg->dev) {
+ if (!cftype_blkg_same_policy(cft, blkg))
+ continue;
+ spin_lock_irq(&blkg->stats_lock);
+ cgroup_total += blkio_get_stat(blkg, cb, blkg->dev,
+ type);
+ spin_unlock_irq(&blkg->stats_lock);
+ }
+ }
+ if (show_total)
+ cb->fill(cb, "Total", cgroup_total);
+ rcu_read_unlock();
+ return 0;
+}
+
+/* All map kind of cgroup file get serviced by this function */
+static int blkiocg_file_read_map(struct cgroup *cgrp, struct cftype *cft,
+ struct cgroup_map_cb *cb)
+{
+ 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_time:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_TIME, 0);
+ case BLKIO_PROP_sectors:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_SECTORS, 0);
+ case BLKIO_PROP_io_service_bytes:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_SERVICE_BYTES, 1);
+ case BLKIO_PROP_io_serviced:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_SERVICED, 1);
+ case BLKIO_PROP_io_service_time:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_SERVICE_TIME, 1);
+ case BLKIO_PROP_io_wait_time:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_WAIT_TIME, 1);
+ case BLKIO_PROP_io_merged:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_MERGED, 1);
+ case BLKIO_PROP_io_queued:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_QUEUED, 1);
+#ifdef CONFIG_DEBUG_BLK_CGROUP
+ case BLKIO_PROP_dequeue:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_DEQUEUE, 0);
+ case BLKIO_PROP_avg_queue_size:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_AVG_QUEUE_SIZE, 0);
+ case BLKIO_PROP_group_wait_time:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_GROUP_WAIT_TIME, 0);
+ case BLKIO_PROP_idle_time:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_IDLE_TIME, 0);
+ case BLKIO_PROP_empty_time:
+ return blkio_read_blkg_stats(blkcg, cft, cb,
+ BLKIO_STAT_EMPTY_TIME, 0);
+#endif
+ default:
+ BUG();
+ }
+ break;
+
+ default:
+ BUG();
+ }
+
+ return 0;
+}
+
+static int blkio_weight_write(struct blkio_cgroup *blkcg, u64 val)
+{
+ struct blkio_group *blkg;
+ struct hlist_node *n;
+ struct blkio_policy_node *pn;
+
+ 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) {
+ pn = blkio_policy_search_node(blkcg, blkg->dev,
+ BLKIO_POLICY_PROP, BLKIO_PROP_weight_device);
+ if (pn)
+ continue;
+
+ blkio_update_group_weight(blkg, blkcg->weight);
+ }
+ spin_unlock_irq(&blkcg->lock);
+ spin_unlock(&blkio_list_lock);
+ 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);
+
+ blkcg = cgroup_to_blkio_cgroup(cgrp);
+
+ switch(plid) {
+ case BLKIO_POLICY_PROP:
+ switch(name) {
+ case BLKIO_PROP_weight:
+ return (u64)blkcg->weight;
+ }
+ break;
+ default:
+ BUG();
+ }
+ return 0;
+}
+
+static int
+blkiocg_file_write_u64(struct cgroup *cgrp, struct cftype *cft, u64 val)
+{
+ 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:
+ return blkio_weight_write(blkcg, val);
+ }
+ break;
+ default:
+ BUG();
+ }
return 0;
}
@@ -827,46 +1039,66 @@ static int blkiocg_weight_device_read(struct cgroup *cgrp, struct cftype *cft,
struct cftype blkio_files[] = {
{
.name = "weight_device",
- .read_seq_string = blkiocg_weight_device_read,
- .write_string = blkiocg_weight_device_write,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_weight_device),
+ .read_seq_string = blkiocg_file_read,
+ .write_string = blkiocg_file_write,
.max_write_len = 256,
},
{
.name = "weight",
- .read_u64 = blkiocg_weight_read,
- .write_u64 = blkiocg_weight_write,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_weight),
+ .read_u64 = blkiocg_file_read_u64,
+ .write_u64 = blkiocg_file_write_u64,
},
{
.name = "time",
- .read_map = blkiocg_time_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_time),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "sectors",
- .read_map = blkiocg_sectors_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_sectors),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "io_service_bytes",
- .read_map = blkiocg_io_service_bytes_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_io_service_bytes),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "io_serviced",
- .read_map = blkiocg_io_serviced_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_io_serviced),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "io_service_time",
- .read_map = blkiocg_io_service_time_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_io_service_time),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "io_wait_time",
- .read_map = blkiocg_io_wait_time_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_io_wait_time),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "io_merged",
- .read_map = blkiocg_io_merged_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_io_merged),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "io_queued",
- .read_map = blkiocg_io_queued_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_io_queued),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "reset_stats",
@@ -875,23 +1107,33 @@ struct cftype blkio_files[] = {
#ifdef CONFIG_DEBUG_BLK_CGROUP
{
.name = "avg_queue_size",
- .read_map = blkiocg_avg_queue_size_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_avg_queue_size),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "group_wait_time",
- .read_map = blkiocg_group_wait_time_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_group_wait_time),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "idle_time",
- .read_map = blkiocg_idle_time_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_idle_time),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "empty_time",
- .read_map = blkiocg_empty_time_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_empty_time),
+ .read_map = blkiocg_file_read_map,
},
{
.name = "dequeue",
- .read_map = blkiocg_dequeue_read,
+ .private = BLKIOFILE_PRIVATE(BLKIO_POLICY_PROP,
+ BLKIO_PROP_dequeue),
+ .read_map = blkiocg_file_read_map,
},
#endif
};
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 2b866ec..c8de259 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -15,6 +15,10 @@
#include <linux/cgroup.h>
+enum blkio_policy_id {
+ BLKIO_POLICY_PROP = 0, /* Proportional Bandwidth division */
+};
+
#if defined(CONFIG_BLK_CGROUP) || defined(CONFIG_BLK_CGROUP_MODULE)
#ifndef CONFIG_BLK_CGROUP
@@ -65,6 +69,25 @@ enum blkg_state_flags {
BLKG_empty,
};
+/* cgroup files owned by proportional weight policy */
+enum blkcg_file_name_prop {
+ BLKIO_PROP_weight = 1,
+ BLKIO_PROP_weight_device,
+ BLKIO_PROP_io_service_bytes,
+ BLKIO_PROP_io_serviced,
+ BLKIO_PROP_time,
+ BLKIO_PROP_sectors,
+ BLKIO_PROP_io_service_time,
+ BLKIO_PROP_io_wait_time,
+ BLKIO_PROP_io_merged,
+ BLKIO_PROP_io_queued,
+ BLKIO_PROP_avg_queue_size,
+ BLKIO_PROP_group_wait_time,
+ BLKIO_PROP_idle_time,
+ BLKIO_PROP_empty_time,
+ BLKIO_PROP_dequeue,
+};
+
struct blkio_cgroup {
struct cgroup_subsys_state css;
unsigned int weight;
@@ -112,6 +135,8 @@ struct blkio_group {
char path[128];
/* The device MKDEV(major, minor), this group has been created for */
dev_t dev;
+ /* policy which owns this blk group */
+ enum blkio_policy_id plid;
/* Need to serialize the stats in the case of reset/update */
spinlock_t stats_lock;
@@ -122,6 +147,10 @@ struct blkio_policy_node {
struct list_head node;
dev_t dev;
unsigned int weight;
+ /* This node belongs to max bw policy or porportional weight policy */
+ enum blkio_policy_id plid;
+ /* cgroup file to which this rule belongs to */
+ int fileid;
};
extern unsigned int blkcg_get_weight(struct blkio_cgroup *blkcg,
@@ -139,6 +168,7 @@ struct blkio_policy_ops {
struct blkio_policy_type {
struct list_head list;
struct blkio_policy_ops ops;
+ enum blkio_policy_id plid;
};
/* Blkio controller policy registration */
@@ -212,7 +242,8 @@ static inline void blkiocg_set_start_empty_time(struct blkio_group *blkg) {}
extern struct blkio_cgroup blkio_root_cgroup;
extern struct blkio_cgroup *cgroup_to_blkio_cgroup(struct cgroup *cgroup);
extern void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
- struct blkio_group *blkg, void *key, dev_t dev);
+ struct blkio_group *blkg, void *key, dev_t dev,
+ enum blkio_policy_id plid);
extern int blkiocg_del_blkio_group(struct blkio_group *blkg);
extern struct blkio_group *blkiocg_lookup_group(struct blkio_cgroup *blkcg,
void *key);
@@ -234,7 +265,8 @@ static inline struct blkio_cgroup *
cgroup_to_blkio_cgroup(struct cgroup *cgroup) { return NULL; }
static inline void blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
- struct blkio_group *blkg, void *key, dev_t dev) {}
+ struct blkio_group *blkg, void *key, dev_t dev,
+ enum blkio_policy_id plid) {}
static inline int
blkiocg_del_blkio_group(struct blkio_group *blkg) { return 0; }
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index eb4086f..b9f8619 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -4013,6 +4013,7 @@ static struct blkio_policy_type blkio_policy_cfq = {
.blkio_unlink_group_fn = cfq_unlink_blkio_group,
.blkio_update_group_weight_fn = cfq_update_blkio_group_weight,
},
+ .plid = BLKIO_POLICY_PROP,
};
#else
static struct blkio_policy_type blkio_policy_cfq;
diff --git a/block/cfq.h b/block/cfq.h
index 93448e5..54a6d90 100644
--- a/block/cfq.h
+++ b/block/cfq.h
@@ -69,7 +69,7 @@ static inline void cfq_blkiocg_update_completion_stats(struct blkio_group *blkg,
static inline void cfq_blkiocg_add_blkio_group(struct blkio_cgroup *blkcg,
struct blkio_group *blkg, void *key, dev_t dev) {
- blkiocg_add_blkio_group(blkcg, blkg, key, dev);
+ blkiocg_add_blkio_group(blkcg, blkg, key, dev, BLKIO_POLICY_PROP);
}
static inline int cfq_blkiocg_del_blkio_group(struct blkio_group *blkg)
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