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cgroup: pass around cgroup_subsys_state instead of cgroup in file methods

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cgroup is currently in the process of transitioning to using struct
cgroup_subsys_state * as the primary handle instead of struct cgroup.
Please see the previous commit which converts the subsystem methods
for rationale.

This patch converts all cftype file operations to take @css instead of
@cgroup.  cftypes for the cgroup core files don't have their subsytem
pointer set.  These will automatically use the dummy_css added by the
previous patch and can be converted the same way.

Most subsystem conversions are straight forwards but there are some
interesting ones.

* freezer: update_if_frozen() is also converted to take @css instead
  of @cgroup for consistency.  This will make the code look simpler
  too once iterators are converted to use css.

* memory/vmpressure: mem_cgroup_from_css() needs to be exported to
  vmpressure while mem_cgroup_from_cont() can be made static.
  Updated accordingly.

* cpu: cgroup_tg() doesn't have any user left.  Removed.

* cpuacct: cgroup_ca() doesn't have any user left.  Removed.

* hugetlb: hugetlb_cgroup_form_cgroup() doesn't have any user left.
  Removed.

* net_cls: cgrp_cls_state() doesn't have any user left.  Removed.

Signed-off-by: Tejun Heo <[email protected]>
Acked-by: Li Zefan <[email protected]>
Acked-by: Michal Hocko <[email protected]>
Acked-by: Vivek Goyal <[email protected]>
Acked-by: Aristeu Rozanski <[email protected]>
Acked-by: Daniel Wagner <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Johannes Weiner <[email protected]>
Cc: Balbir Singh <[email protected]>
Cc: Matt Helsley <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: Steven Rostedt <[email protected]>
This commit is contained in:
Tejun Heo 2013-08-08 20:11:24 -04:00
commit 182446d087
17 changed files with 322 additions and 328 deletions
Download patch file Download diff file Expand all files Collapse all files

32
block/blk-throttle.c
View file

@ -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);
@ -1325,26 +1325,26 @@ 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;
@ -1403,16 +1403,16 @@ 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[] = {