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-rw-r--r--block/blk-cgroup.c49
-rw-r--r--block/blk-cgroup.h38
-rw-r--r--block/blk-throttle.c43
-rw-r--r--block/cfq-iosched.c90
4 files changed, 105 insertions, 115 deletions
diff --git a/block/blk-cgroup.c b/block/blk-cgroup.c
index 290792a..e90c7c1 100644
--- a/block/blk-cgroup.c
+++ b/block/blk-cgroup.c
@@ -437,10 +437,10 @@ struct request_list *__blk_queue_next_rl(struct request_list *rl,
return &blkg->rl;
}
-static int blkcg_reset_stats(struct cgroup *cgroup, struct cftype *cftype,
- u64 val)
+static int blkcg_reset_stats(struct cgroup_subsys_state *css,
+ struct cftype *cftype, u64 val)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgroup);
+ struct blkcg *blkcg = css_to_blkcg(css);
struct blkcg_gq *blkg;
int i;
@@ -614,15 +614,13 @@ u64 blkg_stat_recursive_sum(struct blkg_policy_data *pd, int off)
{
struct blkcg_policy *pol = blkcg_policy[pd->plid];
struct blkcg_gq *pos_blkg;
- struct cgroup *pos_cgrp;
- u64 sum;
+ struct cgroup_subsys_state *pos_css;
+ u64 sum = 0;
lockdep_assert_held(pd->blkg->q->queue_lock);
- sum = blkg_stat_read((void *)pd + off);
-
rcu_read_lock();
- blkg_for_each_descendant_pre(pos_blkg, pos_cgrp, pd_to_blkg(pd)) {
+ blkg_for_each_descendant_pre(pos_blkg, pos_css, pd_to_blkg(pd)) {
struct blkg_policy_data *pos_pd = blkg_to_pd(pos_blkg, pol);
struct blkg_stat *stat = (void *)pos_pd + off;
@@ -649,16 +647,14 @@ struct blkg_rwstat blkg_rwstat_recursive_sum(struct blkg_policy_data *pd,
{
struct blkcg_policy *pol = blkcg_policy[pd->plid];
struct blkcg_gq *pos_blkg;
- struct cgroup *pos_cgrp;
- struct blkg_rwstat sum;
+ struct cgroup_subsys_state *pos_css;
+ struct blkg_rwstat sum = { };
int i;
lockdep_assert_held(pd->blkg->q->queue_lock);
- sum = blkg_rwstat_read((void *)pd + off);
-
rcu_read_lock();
- blkg_for_each_descendant_pre(pos_blkg, pos_cgrp, pd_to_blkg(pd)) {
+ blkg_for_each_descendant_pre(pos_blkg, pos_css, pd_to_blkg(pd)) {
struct blkg_policy_data *pos_pd = blkg_to_pd(pos_blkg, pol);
struct blkg_rwstat *rwstat = (void *)pos_pd + off;
struct blkg_rwstat tmp;
@@ -765,18 +761,18 @@ struct cftype blkcg_files[] = {
/**
* blkcg_css_offline - cgroup css_offline callback
- * @cgroup: cgroup of interest
+ * @css: css of interest
*
- * This function is called when @cgroup is about to go away and responsible
- * for shooting down all blkgs associated with @cgroup. blkgs should be
+ * This function is called when @css is about to go away and responsible
+ * for shooting down all blkgs associated with @css. blkgs should be
* removed while holding both q and blkcg locks. As blkcg lock is nested
* inside q lock, this function performs reverse double lock dancing.
*
* This is the blkcg counterpart of ioc_release_fn().
*/
-static void blkcg_css_offline(struct cgroup *cgroup)
+static void blkcg_css_offline(struct cgroup_subsys_state *css)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgroup);
+ struct blkcg *blkcg = css_to_blkcg(css);
spin_lock_irq(&blkcg->lock);
@@ -798,21 +794,21 @@ static void blkcg_css_offline(struct cgroup *cgroup)
spin_unlock_irq(&blkcg->lock);
}
-static void blkcg_css_free(struct cgroup *cgroup)
+static void blkcg_css_free(struct cgroup_subsys_state *css)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgroup);
+ struct blkcg *blkcg = css_to_blkcg(css);
if (blkcg != &blkcg_root)
kfree(blkcg);
}
-static struct cgroup_subsys_state *blkcg_css_alloc(struct cgroup *cgroup)
+static struct cgroup_subsys_state *
+blkcg_css_alloc(struct cgroup_subsys_state *parent_css)
{
static atomic64_t id_seq = ATOMIC64_INIT(0);
struct blkcg *blkcg;
- struct cgroup *parent = cgroup->parent;
- if (!parent) {
+ if (!parent_css) {
blkcg = &blkcg_root;
goto done;
}
@@ -883,14 +879,15 @@ void blkcg_exit_queue(struct request_queue *q)
* of the main cic data structures. For now we allow a task to change
* its cgroup only if it's the only owner of its ioc.
*/
-static int blkcg_can_attach(struct cgroup *cgrp, struct cgroup_taskset *tset)
+static int blkcg_can_attach(struct cgroup_subsys_state *css,
+ struct cgroup_taskset *tset)
{
struct task_struct *task;
struct io_context *ioc;
int ret = 0;
/* task_lock() is needed to avoid races with exit_io_context() */
- cgroup_taskset_for_each(task, cgrp, tset) {
+ cgroup_taskset_for_each(task, css, tset) {
task_lock(task);
ioc = task->io_context;
if (ioc && atomic_read(&ioc->nr_tasks) > 1)
@@ -1127,7 +1124,7 @@ void blkcg_policy_unregister(struct blkcg_policy *pol)
/* kill the intf files first */
if (pol->cftypes)
- cgroup_rm_cftypes(&blkio_subsys, pol->cftypes);
+ cgroup_rm_cftypes(pol->cftypes);
/* unregister and update blkgs */
blkcg_policy[pol->plid] = NULL;
diff --git a/block/blk-cgroup.h b/block/blk-cgroup.h
index 8056c03..ae6969a 100644
--- a/block/blk-cgroup.h
+++ b/block/blk-cgroup.h
@@ -179,22 +179,20 @@ int blkg_conf_prep(struct blkcg *blkcg, const struct blkcg_policy *pol,
void blkg_conf_finish(struct blkg_conf_ctx *ctx);
-static inline struct blkcg *cgroup_to_blkcg(struct cgroup *cgroup)
+static inline struct blkcg *css_to_blkcg(struct cgroup_subsys_state *css)
{
- return container_of(cgroup_subsys_state(cgroup, blkio_subsys_id),
- struct blkcg, css);
+ return css ? container_of(css, struct blkcg, css) : NULL;
}
static inline struct blkcg *task_blkcg(struct task_struct *tsk)
{
- return container_of(task_subsys_state(tsk, blkio_subsys_id),
- struct blkcg, css);
+ return css_to_blkcg(task_css(tsk, blkio_subsys_id));
}
static inline struct blkcg *bio_blkcg(struct bio *bio)
{
if (bio && bio->bi_css)
- return container_of(bio->bi_css, struct blkcg, css);
+ return css_to_blkcg(bio->bi_css);
return task_blkcg(current);
}
@@ -206,9 +204,7 @@ static inline struct blkcg *bio_blkcg(struct bio *bio)
*/
static inline struct blkcg *blkcg_parent(struct blkcg *blkcg)
{
- struct cgroup *pcg = blkcg->css.cgroup->parent;
-
- return pcg ? cgroup_to_blkcg(pcg) : NULL;
+ return css_to_blkcg(css_parent(&blkcg->css));
}
/**
@@ -288,32 +284,33 @@ struct blkcg_gq *__blkg_lookup(struct blkcg *blkcg, struct request_queue *q,
/**
* blkg_for_each_descendant_pre - pre-order walk of a blkg's descendants
* @d_blkg: loop cursor pointing to the current descendant
- * @pos_cgrp: used for iteration
+ * @pos_css: used for iteration
* @p_blkg: target blkg to walk descendants of
*
* Walk @c_blkg through the descendants of @p_blkg. Must be used with RCU
* read locked. If called under either blkcg or queue lock, the iteration
* is guaranteed to include all and only online blkgs. The caller may
- * update @pos_cgrp by calling cgroup_rightmost_descendant() to skip
- * subtree.
+ * update @pos_css by calling css_rightmost_descendant() to skip subtree.
+ * @p_blkg is included in the iteration and the first node to be visited.
*/
-#define blkg_for_each_descendant_pre(d_blkg, pos_cgrp, p_blkg) \
- cgroup_for_each_descendant_pre((pos_cgrp), (p_blkg)->blkcg->css.cgroup) \
- if (((d_blkg) = __blkg_lookup(cgroup_to_blkcg(pos_cgrp), \
+#define blkg_for_each_descendant_pre(d_blkg, pos_css, p_blkg) \
+ css_for_each_descendant_pre((pos_css), &(p_blkg)->blkcg->css) \
+ if (((d_blkg) = __blkg_lookup(css_to_blkcg(pos_css), \
(p_blkg)->q, false)))
/**
* blkg_for_each_descendant_post - post-order walk of a blkg's descendants
* @d_blkg: loop cursor pointing to the current descendant
- * @pos_cgrp: used for iteration
+ * @pos_css: used for iteration
* @p_blkg: target blkg to walk descendants of
*
* Similar to blkg_for_each_descendant_pre() but performs post-order
- * traversal instead. Synchronization rules are the same.
+ * traversal instead. Synchronization rules are the same. @p_blkg is
+ * included in the iteration and the last node to be visited.
*/
-#define blkg_for_each_descendant_post(d_blkg, pos_cgrp, p_blkg) \
- cgroup_for_each_descendant_post((pos_cgrp), (p_blkg)->blkcg->css.cgroup) \
- if (((d_blkg) = __blkg_lookup(cgroup_to_blkcg(pos_cgrp), \
+#define blkg_for_each_descendant_post(d_blkg, pos_css, p_blkg) \
+ css_for_each_descendant_post((pos_css), &(p_blkg)->blkcg->css) \
+ if (((d_blkg) = __blkg_lookup(css_to_blkcg(pos_css), \
(p_blkg)->q, false)))
/**
@@ -576,7 +573,6 @@ static inline int blkcg_activate_policy(struct request_queue *q,
static inline void blkcg_deactivate_policy(struct request_queue *q,
const struct blkcg_policy *pol) { }
-static inline struct blkcg *cgroup_to_blkcg(struct cgroup *cgroup) { return NULL; }
static inline struct blkcg *bio_blkcg(struct bio *bio) { return NULL; }
static inline struct blkg_policy_data *blkg_to_pd(struct blkcg_gq *blkg,
diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 08a32df..8331aba 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -1293,10 +1293,10 @@ static u64 tg_prfill_cpu_rwstat(struct seq_file *sf,
return __blkg_prfill_rwstat(sf, pd, &rwstat);
}
-static int tg_print_cpu_rwstat(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int tg_print_cpu_rwstat(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
blkcg_print_blkgs(sf, blkcg, tg_prfill_cpu_rwstat, &blkcg_policy_throtl,
cft->private, true);
@@ -1325,31 +1325,31 @@ static u64 tg_prfill_conf_uint(struct seq_file *sf, struct blkg_policy_data *pd,
return __blkg_prfill_u64(sf, pd, v);
}
-static int tg_print_conf_u64(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int tg_print_conf_u64(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- blkcg_print_blkgs(sf, cgroup_to_blkcg(cgrp), tg_prfill_conf_u64,
+ blkcg_print_blkgs(sf, css_to_blkcg(css), tg_prfill_conf_u64,
&blkcg_policy_throtl, cft->private, false);
return 0;
}
-static int tg_print_conf_uint(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int tg_print_conf_uint(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- blkcg_print_blkgs(sf, cgroup_to_blkcg(cgrp), tg_prfill_conf_uint,
+ blkcg_print_blkgs(sf, css_to_blkcg(css), tg_prfill_conf_uint,
&blkcg_policy_throtl, cft->private, false);
return 0;
}
-static int tg_set_conf(struct cgroup *cgrp, struct cftype *cft, const char *buf,
- bool is_u64)
+static int tg_set_conf(struct cgroup_subsys_state *css, struct cftype *cft,
+ const char *buf, bool is_u64)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
struct blkg_conf_ctx ctx;
struct throtl_grp *tg;
struct throtl_service_queue *sq;
struct blkcg_gq *blkg;
- struct cgroup *pos_cgrp;
+ struct cgroup_subsys_state *pos_css;
int ret;
ret = blkg_conf_prep(blkcg, &blkcg_policy_throtl, buf, &ctx);
@@ -1379,8 +1379,7 @@ static int tg_set_conf(struct cgroup *cgrp, struct cftype *cft, const char *buf,
* restrictions in the whole hierarchy and allows them to bypass
* blk-throttle.
*/
- tg_update_has_rules(tg);
- blkg_for_each_descendant_pre(blkg, pos_cgrp, ctx.blkg)
+ blkg_for_each_descendant_pre(blkg, pos_css, ctx.blkg)
tg_update_has_rules(blkg_to_tg(blkg));
/*
@@ -1403,16 +1402,16 @@ static int tg_set_conf(struct cgroup *cgrp, struct cftype *cft, const char *buf,
return 0;
}
-static int tg_set_conf_u64(struct cgroup *cgrp, struct cftype *cft,
+static int tg_set_conf_u64(struct cgroup_subsys_state *css, struct cftype *cft,
const char *buf)
{
- return tg_set_conf(cgrp, cft, buf, true);
+ return tg_set_conf(css, cft, buf, true);
}
-static int tg_set_conf_uint(struct cgroup *cgrp, struct cftype *cft,
+static int tg_set_conf_uint(struct cgroup_subsys_state *css, struct cftype *cft,
const char *buf)
{
- return tg_set_conf(cgrp, cft, buf, false);
+ return tg_set_conf(css, cft, buf, false);
}
static struct cftype throtl_files[] = {
@@ -1623,7 +1622,7 @@ void blk_throtl_drain(struct request_queue *q)
{
struct throtl_data *td = q->td;
struct blkcg_gq *blkg;
- struct cgroup *pos_cgrp;
+ struct cgroup_subsys_state *pos_css;
struct bio *bio;
int rw;
@@ -1636,11 +1635,9 @@ void blk_throtl_drain(struct request_queue *q)
* better to walk service_queue tree directly but blkg walk is
* easier.
*/
- blkg_for_each_descendant_post(blkg, pos_cgrp, td->queue->root_blkg)
+ blkg_for_each_descendant_post(blkg, pos_css, td->queue->root_blkg)
tg_drain_bios(&blkg_to_tg(blkg)->service_queue);
- tg_drain_bios(&td_root_tg(td)->service_queue);
-
/* finally, transfer bios from top-level tg's into the td */
tg_drain_bios(&td->service_queue);
diff --git a/block/cfq-iosched.c b/block/cfq-iosched.c
index d5bbdcf..dabb9d0 100644
--- a/block/cfq-iosched.c
+++ b/block/cfq-iosched.c
@@ -1607,12 +1607,11 @@ static u64 cfqg_prfill_weight_device(struct seq_file *sf,
return __blkg_prfill_u64(sf, pd, cfqg->dev_weight);
}
-static int cfqg_print_weight_device(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int cfqg_print_weight_device(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- blkcg_print_blkgs(sf, cgroup_to_blkcg(cgrp),
- cfqg_prfill_weight_device, &blkcg_policy_cfq, 0,
- false);
+ blkcg_print_blkgs(sf, css_to_blkcg(css), cfqg_prfill_weight_device,
+ &blkcg_policy_cfq, 0, false);
return 0;
}
@@ -1626,35 +1625,34 @@ static u64 cfqg_prfill_leaf_weight_device(struct seq_file *sf,
return __blkg_prfill_u64(sf, pd, cfqg->dev_leaf_weight);
}
-static int cfqg_print_leaf_weight_device(struct cgroup *cgrp,
+static int cfqg_print_leaf_weight_device(struct cgroup_subsys_state *css,
struct cftype *cft,
struct seq_file *sf)
{
- blkcg_print_blkgs(sf, cgroup_to_blkcg(cgrp),
- cfqg_prfill_leaf_weight_device, &blkcg_policy_cfq, 0,
- false);
+ blkcg_print_blkgs(sf, css_to_blkcg(css), cfqg_prfill_leaf_weight_device,
+ &blkcg_policy_cfq, 0, false);
return 0;
}
-static int cfq_print_weight(struct cgroup *cgrp, struct cftype *cft,
+static int cfq_print_weight(struct cgroup_subsys_state *css, struct cftype *cft,
struct seq_file *sf)
{
- seq_printf(sf, "%u\n", cgroup_to_blkcg(cgrp)->cfq_weight);
+ seq_printf(sf, "%u\n", css_to_blkcg(css)->cfq_weight);
return 0;
}
-static int cfq_print_leaf_weight(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int cfq_print_leaf_weight(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- seq_printf(sf, "%u\n",
- cgroup_to_blkcg(cgrp)->cfq_leaf_weight);
+ seq_printf(sf, "%u\n", css_to_blkcg(css)->cfq_leaf_weight);
return 0;
}
-static int __cfqg_set_weight_device(struct cgroup *cgrp, struct cftype *cft,
- const char *buf, bool is_leaf_weight)
+static int __cfqg_set_weight_device(struct cgroup_subsys_state *css,
+ struct cftype *cft, const char *buf,
+ bool is_leaf_weight)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
struct blkg_conf_ctx ctx;
struct cfq_group *cfqg;
int ret;
@@ -1680,22 +1678,22 @@ static int __cfqg_set_weight_device(struct cgroup *cgrp, struct cftype *cft,
return ret;
}
-static int cfqg_set_weight_device(struct cgroup *cgrp, struct cftype *cft,
- const char *buf)
+static int cfqg_set_weight_device(struct cgroup_subsys_state *css,
+ struct cftype *cft, const char *buf)
{
- return __cfqg_set_weight_device(cgrp, cft, buf, false);
+ return __cfqg_set_weight_device(css, cft, buf, false);
}
-static int cfqg_set_leaf_weight_device(struct cgroup *cgrp, struct cftype *cft,
- const char *buf)
+static int cfqg_set_leaf_weight_device(struct cgroup_subsys_state *css,
+ struct cftype *cft, const char *buf)
{
- return __cfqg_set_weight_device(cgrp, cft, buf, true);
+ return __cfqg_set_weight_device(css, cft, buf, true);
}
-static int __cfq_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val,
- bool is_leaf_weight)
+static int __cfq_set_weight(struct cgroup_subsys_state *css, struct cftype *cft,
+ u64 val, bool is_leaf_weight)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
struct blkcg_gq *blkg;
if (val < CFQ_WEIGHT_MIN || val > CFQ_WEIGHT_MAX)
@@ -1727,30 +1725,32 @@ static int __cfq_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val,
return 0;
}
-static int cfq_set_weight(struct cgroup *cgrp, struct cftype *cft, u64 val)
+static int cfq_set_weight(struct cgroup_subsys_state *css, struct cftype *cft,
+ u64 val)
{
- return __cfq_set_weight(cgrp, cft, val, false);
+ return __cfq_set_weight(css, cft, val, false);
}
-static int cfq_set_leaf_weight(struct cgroup *cgrp, struct cftype *cft, u64 val)
+static int cfq_set_leaf_weight(struct cgroup_subsys_state *css,
+ struct cftype *cft, u64 val)
{
- return __cfq_set_weight(cgrp, cft, val, true);
+ return __cfq_set_weight(css, cft, val, true);
}
-static int cfqg_print_stat(struct cgroup *cgrp, struct cftype *cft,
+static int cfqg_print_stat(struct cgroup_subsys_state *css, struct cftype *cft,
struct seq_file *sf)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
blkcg_print_blkgs(sf, blkcg, blkg_prfill_stat, &blkcg_policy_cfq,
cft->private, false);
return 0;
}
-static int cfqg_print_rwstat(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int cfqg_print_rwstat(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
blkcg_print_blkgs(sf, blkcg, blkg_prfill_rwstat, &blkcg_policy_cfq,
cft->private, true);
@@ -1773,20 +1773,20 @@ static u64 cfqg_prfill_rwstat_recursive(struct seq_file *sf,
return __blkg_prfill_rwstat(sf, pd, &sum);
}
-static int cfqg_print_stat_recursive(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int cfqg_print_stat_recursive(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
blkcg_print_blkgs(sf, blkcg, cfqg_prfill_stat_recursive,
&blkcg_policy_cfq, cft->private, false);
return 0;
}
-static int cfqg_print_rwstat_recursive(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int cfqg_print_rwstat_recursive(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
blkcg_print_blkgs(sf, blkcg, cfqg_prfill_rwstat_recursive,
&blkcg_policy_cfq, cft->private, true);
@@ -1810,10 +1810,10 @@ static u64 cfqg_prfill_avg_queue_size(struct seq_file *sf,
}
/* print avg_queue_size */
-static int cfqg_print_avg_queue_size(struct cgroup *cgrp, struct cftype *cft,
- struct seq_file *sf)
+static int cfqg_print_avg_queue_size(struct cgroup_subsys_state *css,
+ struct cftype *cft, struct seq_file *sf)
{
- struct blkcg *blkcg = cgroup_to_blkcg(cgrp);
+ struct blkcg *blkcg = css_to_blkcg(css);
blkcg_print_blkgs(sf, blkcg, cfqg_prfill_avg_queue_size,
&blkcg_policy_cfq, 0, false);
generated by cgit v0.10.2 at 2024-06-10 01:52:12 (GMT)