Commit 182446d0 authored by Tejun Heo's avatar Tejun Heo
Browse files

cgroup: pass around cgroup_subsys_state instead of cgroup in file methods



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: default avatarTejun Heo <tj@kernel.org>
Acked-by: default avatarLi Zefan <lizefan@huawei.com>
Acked-by: default avatarMichal Hocko <mhocko@suse.cz>
Acked-by: default avatarVivek Goyal <vgoyal@redhat.com>
Acked-by: default avatarAristeu Rozanski <aris@redhat.com>
Acked-by: default avatarDaniel Wagner <daniel.wagner@bmw-carit.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: Matt Helsley <matthltc@us.ibm.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: Steven Rostedt <rostedt@goodmis.org>
parent 67f4c36f
......@@ -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;
......
......@@ -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[] = {
......
......@@ -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);
......
......@@ -439,34 +439,34 @@ struct cftype {
struct cgroup_subsys *ss;
int (*open)(struct inode *inode, struct file *file);
ssize_t (*read)(struct cgroup *cgrp, struct cftype *cft,
ssize_t (*read)(struct cgroup_subsys_state *css, struct cftype *cft,
struct file *file,
char __user *buf, size_t nbytes, loff_t *ppos);
/*
* read_u64() is a shortcut for the common case of returning a
* single integer. Use it in place of read()
*/
u64 (*read_u64)(struct cgroup *cgrp, struct cftype *cft);
u64 (*read_u64)(struct cgroup_subsys_state *css, struct cftype *cft);
/*
* read_s64() is a signed version of read_u64()
*/
s64 (*read_s64)(struct cgroup *cgrp, struct cftype *cft);
s64 (*read_s64)(struct cgroup_subsys_state *css, struct cftype *cft);
/*
* read_map() is used for defining a map of key/value
* pairs. It should call cb->fill(cb, key, value) for each
* entry. The key/value pairs (and their ordering) should not
* change between reboots.
*/
int (*read_map)(struct cgroup *cgrp, struct cftype *cft,
int (*read_map)(struct cgroup_subsys_state *css, struct cftype *cft,
struct cgroup_map_cb *cb);
/*
* read_seq_string() is used for outputting a simple sequence
* using seqfile.
*/
int (*read_seq_string)(struct cgroup *cgrp, struct cftype *cft,
struct seq_file *m);
int (*read_seq_string)(struct cgroup_subsys_state *css,
struct cftype *cft, struct seq_file *m);
ssize_t (*write)(struct cgroup *cgrp, struct cftype *cft,
ssize_t (*write)(struct cgroup_subsys_state *css, struct cftype *cft,
struct file *file,
const char __user *buf, size_t nbytes, loff_t *ppos);
......@@ -475,18 +475,20 @@ struct cftype {
* a single integer (as parsed by simple_strtoull) from
* userspace. Use in place of write(); return 0 or error.
*/
int (*write_u64)(struct cgroup *cgrp, struct cftype *cft, u64 val);
int (*write_u64)(struct cgroup_subsys_state *css, struct cftype *cft,
u64 val);
/*
* write_s64() is a signed version of write_u64()
*/
int (*write_s64)(struct cgroup *cgrp, struct cftype *cft, s64 val);
int (*write_s64)(struct cgroup_subsys_state *css, struct cftype *cft,
s64 val);
/*
* write_string() is passed a nul-terminated kernelspace
* buffer of maximum length determined by max_write_len.
* Returns 0 or -ve error code.
*/
int (*write_string)(struct cgroup *cgrp, struct cftype *cft,
int (*write_string)(struct cgroup_subsys_state *css, struct cftype *cft,
const char *buffer);
/*
* trigger() callback can be used to get some kick from the
......@@ -494,7 +496,7 @@ struct cftype {
* at all. The private field can be used to determine the
* kick type for multiplexing.
*/
int (*trigger)(struct cgroup *cgrp, unsigned int event);
int (*trigger)(struct cgroup_subsys_state *css, unsigned int event);
int (*release)(struct inode *inode, struct file *file);
......
......@@ -85,7 +85,7 @@ extern struct mem_cgroup *mem_cgroup_from_task(struct task_struct *p);
extern struct mem_cgroup *try_get_mem_cgroup_from_mm(struct mm_struct *mm);
extern struct mem_cgroup *parent_mem_cgroup(struct mem_cgroup *memcg);
extern struct mem_cgroup *mem_cgroup_from_cont(struct cgroup *cont);
extern struct mem_cgroup *mem_cgroup_from_css(struct cgroup_subsys_state *css);
static inline
bool mm_match_cgroup(const struct mm_struct *mm, const struct mem_cgroup *memcg)
......
......@@ -2235,34 +2235,38 @@ int cgroup_attach_task_all(struct task_struct *from, struct task_struct *tsk)
}
EXPORT_SYMBOL_GPL(cgroup_attach_task_all);
static int cgroup_tasks_write(struct cgroup *cgrp, struct cftype *cft, u64 pid)
static int cgroup_tasks_write(struct cgroup_subsys_state *css,
struct cftype *cft, u64 pid)
{
return attach_task_by_pid(cgrp, pid, false);
return attach_task_by_pid(css->cgroup, pid, false);
}
static int cgroup_procs_write(struct cgroup *cgrp, struct cftype *cft, u64 tgid)
static int cgroup_procs_write(struct cgroup_subsys_state *css,
struct cftype *cft, u64 tgid)
{
return attach_task_by_pid(cgrp, tgid, true);
return attach_task_by_pid(css->cgroup, tgid, true);
}
static int cgroup_release_agent_write(struct cgroup *cgrp, struct cftype *cft,
const char *buffer)
static int cgroup_release_agent_write(struct cgroup_subsys_state *css,
struct cftype *cft, const char *buffer)
{
BUILD_BUG_ON(sizeof(cgrp->root->release_agent_path) < PATH_MAX);
BUILD_BUG_ON(sizeof(css->cgroup->root->release_agent_path) < PATH_MAX);
if (strlen(buffer) >= PATH_MAX)
return -EINVAL;
if (!cgroup_lock_live_group(cgrp))
if (!cgroup_lock_live_group(css->cgroup))
return -ENODEV;
mutex_lock(&cgroup_root_mutex);
strcpy(cgrp->root->release_agent_path, buffer);
strcpy(css->cgroup->root->release_agent_path, buffer);
mutex_unlock(&cgroup_root_mutex);
mutex_unlock(&cgroup_mutex);
return 0;
}
static int cgroup_release_agent_show(struct cgroup *cgrp, struct cftype *cft,
struct seq_file *seq)
static int cgroup_release_agent_show(struct cgroup_subsys_state *css,
struct cftype *cft, struct seq_file *seq)
{
struct cgroup *cgrp = css->cgroup;
if (!cgroup_lock_live_group(cgrp))
return -ENODEV;
seq_puts(seq, cgrp->root->release_agent_path);
......@@ -2271,10 +2275,10 @@ static int cgroup_release_agent_show(struct cgroup *cgrp, struct cftype *cft,
return 0;
}
static int cgroup_sane_behavior_show(struct cgroup *cgrp, struct cftype *cft,
struct seq_file *seq)
static int cgroup_sane_behavior_show(struct cgroup_subsys_state *css,
struct cftype *cft, struct seq_file *seq)
{
seq_printf(seq, "%d\n", cgroup_sane_behavior(cgrp));
seq_printf(seq, "%d\n", cgroup_sane_behavior(css->cgroup));
return 0;
}
......@@ -2292,10 +2296,10 @@ static struct cgroup_subsys_state *cgroup_file_css(struct cfent *cfe)
/* A buffer size big enough for numbers or short strings */
#define CGROUP_LOCAL_BUFFER_SIZE 64
static ssize_t cgroup_write_X64(struct cgroup *cgrp, struct cftype *cft,
struct file *file,
const char __user *userbuf,
size_t nbytes, loff_t *unused_ppos)
static ssize_t cgroup_write_X64(struct cgroup_subsys_state *css,
struct cftype *cft, struct file *file,
const char __user *userbuf, size_t nbytes,
loff_t *unused_ppos)
{
char buffer[CGROUP_LOCAL_BUFFER_SIZE];
int retval = 0;
......@@ -2313,22 +2317,22 @@ static ssize_t cgroup_write_X64(struct cgroup *cgrp, struct cftype *cft,
u64 val = simple_strtoull(strstrip(buffer), &end, 0);
if (*end)
return -EINVAL;
retval = cft->write_u64(cgrp, cft, val);
retval = cft->write_u64(css, cft, val);
} else {
s64 val = simple_strtoll(strstrip(buffer), &end, 0);
if (*end)
return -EINVAL;
retval = cft->write_s64(cgrp, cft, val);
retval = cft->write_s64(css, cft, val);
}
if (!retval)
retval = nbytes;
return retval;
}
static ssize_t cgroup_write_string(struct cgroup *cgrp, struct cftype *cft,
struct file *file,
const char __user *userbuf,
size_t nbytes, loff_t *unused_ppos)
static ssize_t cgroup_write_string(struct cgroup_subsys_state *css,
struct cftype *cft, struct file *file,
const char __user *userbuf, size_t nbytes,
loff_t *unused_ppos)
{
char local_buffer[CGROUP_LOCAL_BUFFER_SIZE];
int retval = 0;
......@@ -2351,7 +2355,7 @@ static ssize_t cgroup_write_string(struct cgroup *cgrp, struct cftype *cft,
}
buffer[nbytes] = 0; /* nul-terminate */
retval = cft->write_string(cgrp, cft, strstrip(buffer));
retval = cft->write_string(css, cft, strstrip(buffer));
if (!retval)
retval = nbytes;
out:
......@@ -2361,60 +2365,60 @@ out:
}
static ssize_t cgroup_file_write(struct file *file, const char __user *buf,
size_t nbytes, loff_t *ppos)
size_t nbytes, loff_t *ppos)
{
struct cfent *cfe = __d_cfe(file->f_dentry);
struct cftype *cft = __d_cft(file->f_dentry);
struct cgroup *cgrp = __d_cgrp(file->f_dentry->d_parent);
struct cgroup_subsys_state *css = cgroup_file_css(cfe);
if (cft->write)
return cft->write(cgrp, cft, file, buf, nbytes, ppos);
return cft->write(css, cft, file, buf, nbytes, ppos);
if (cft->write_u64 || cft->write_s64)
return cgroup_write_X64(cgrp, cft, file, buf, nbytes, ppos);
return cgroup_write_X64(css, cft, file, buf, nbytes, ppos);
if (cft->write_string)
return cgroup_write_string(cgrp, cft, file, buf, nbytes, ppos);
return cgroup_write_string(css, cft, file, buf, nbytes, ppos);
if (cft->trigger) {
int ret = cft->trigger(cgrp, (unsigned int)cft->private);
int ret = cft->trigger(css, (unsigned int)cft->private);
return ret ? ret : nbytes;
}
return -EINVAL;
}
static ssize_t cgroup_read_u64(struct cgroup *cgrp, struct cftype *cft,
struct file *file,
char __user *buf, size_t nbytes,
loff_t *ppos)
static ssize_t cgroup_read_u64(struct cgroup_subsys_state *css,
struct cftype *cft, struct file *file,
char __user *buf, size_t nbytes, loff_t *ppos)
{
char tmp[CGROUP_LOCAL_BUFFER_SIZE];
u64 val = cft->read_u64(cgrp, cft);
u64 val = cft->read_u64(css, cft);
int len = sprintf(tmp, "%llu\n", (unsigned long long) val);
return simple_read_from_buffer(buf, nbytes, ppos, tmp, len);
}
static ssize_t cgroup_read_s64(struct cgroup *cgrp, struct cftype *cft,
struct file *file,
char __user *buf, size_t nbytes,
loff_t *ppos)
static ssize_t cgroup_read_s64(struct cgroup_subsys_state *css,
struct cftype *cft, struct file *file,
char __user *buf, size_t nbytes, loff_t *ppos)
{
char tmp[CGROUP_LOCAL_BUFFER_SIZE];
s64 val = cft->read_s64(cgrp, cft);
s64 val = cft->read_s64(css, cft);
int len = sprintf(tmp, "%lld\n", (long long) val);
return simple_read_from_buffer(buf, nbytes, ppos, tmp, len);
}
static ssize_t cgroup_file_read(struct file *file, char __user *buf,
size_t nbytes, loff_t *ppos)
size_t nbytes, loff_t *ppos)
{
struct cfent *cfe = __d_cfe(file->f_dentry);
struct cftype *cft = __d_cft(file->f_dentry);
struct cgroup *cgrp = __d_cgrp(file->f_dentry->d_parent);
struct cgroup_subsys_state *css = cgroup_file_css(cfe);
if (cft->read)
return cft->read(cgrp, cft, file, buf, nbytes, ppos);
return cft->read(css, cft, file, buf, nbytes, ppos);
if (cft->read_u64)
return cgroup_read_u64(cgrp, cft, file, buf, nbytes, ppos);
return cgroup_read_u64(css, cft, file, buf, nbytes, ppos);
if (cft->read_s64)
return cgroup_read_s64(cgrp, cft, file, buf, nbytes, ppos);
return cgroup_read_s64(css, cft, file, buf, nbytes, ppos);
return -EINVAL;
}
......@@ -2433,16 +2437,16 @@ static int cgroup_seqfile_show(struct seq_file *m, void *arg)
{
struct cfent *cfe = m->private;
struct cftype *cft = cfe->type;
struct cgroup *cgrp = __d_cgrp(cfe->dentry->d_parent);
struct cgroup_subsys_state *css = cgroup_file_css(cfe);
if (cft->read_map) {
struct cgroup_map_cb cb = {
.fill = cgroup_map_add,
.state = m,
};
return cft->read_map(cgrp, cft, &cb);
return cft->read_map(css, cft, &cb);
}
return cft->read_seq_string(cgrp, cft, m);
return cft->read_seq_string(css, cft, m);
}
static const struct file_operations cgroup_seqfile_operations = {
......@@ -3860,21 +3864,20 @@ static int cgroup_procs_open(struct inode *unused, struct file *file)
return cgroup_pidlist_open(file, CGROUP_FILE_PROCS);
}
static u64 cgroup_read_notify_on_release(struct cgroup *cgrp,
struct cftype *cft)
static u64 cgroup_read_notify_on_release(struct cgroup_subsys_state *css,
struct cftype *cft)
{
return notify_on_release(cgrp);
return notify_on_release(css->cgroup);
}
static int cgroup_write_notify_on_release(struct cgroup *cgrp,
struct cftype *cft,
u64 val)
static int cgroup_write_notify_on_release(struct cgroup_subsys_state *css,
struct cftype *cft, u64 val)
{
clear_bit(CGRP_RELEASABLE, &cgrp->flags);
clear_bit(CGRP_RELEASABLE, &css->cgroup->flags);
if (val)