struct inode;
struct cgroup;
struct css_id;
-struct eventfd_ctx;
extern int cgroup_init_early(void);
extern int cgroup_init(void);
struct rcu_head rcu_head;
struct work_struct destroy_work;
- /* List of events which userspace want to receive */
- struct list_head event_list;
- spinlock_t event_list_lock;
-
/* directory xattrs */
struct simple_xattrs xattrs;
};
* - "tasks" is removed. Everything should be at process
* granularity. Use "cgroup.procs" instead.
*
+ * - "cgroup.procs" is not sorted. pids will be unique unless they
+ * got recycled inbetween reads.
+ *
* - "release_agent" and "notify_on_release" are removed.
* Replacement notification mechanism will be implemented.
*
};
/*
- * cgroup_map_cb is an abstract callback API for reporting map-valued
- * control files
- */
-
-struct cgroup_map_cb {
- int (*fill)(struct cgroup_map_cb *cb, const char *key, u64 value);
- void *state;
-};
-
-/*
* struct cftype: handler definitions for cgroup control files
*
* When reading/writing to a file:
struct cgroup_subsys *ss;
int (*open)(struct inode *inode, struct file *file);
- 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()
*/
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_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_subsys_state *css,
struct cftype *cft, struct seq_file *m);
- ssize_t (*write)(struct cgroup_subsys_state *css, struct cftype *cft,
- struct file *file,
- const char __user *buf, size_t nbytes, loff_t *ppos);
-
/*
* write_u64() is a shortcut for the common case of accepting
* a single integer (as parsed by simple_strtoull) from
* kick type for multiplexing.
*/
int (*trigger)(struct cgroup_subsys_state *css, unsigned int event);
-
- int (*release)(struct inode *inode, struct file *file);
-
- /*
- * register_event() callback will be used to add new userspace
- * waiter for changes related to the cftype. Implement it if
- * you want to provide this functionality. Use eventfd_signal()
- * on eventfd to send notification to userspace.
- */
- int (*register_event)(struct cgroup_subsys_state *css,
- struct cftype *cft, struct eventfd_ctx *eventfd,
- const char *args);
- /*
- * unregister_event() callback will be called when userspace
- * closes the eventfd or on cgroup removing.
- * This callback must be implemented, if you want provide
- * notification functionality.
- */
- void (*unregister_event)(struct cgroup_subsys_state *css,
- struct cftype *cft,
- struct eventfd_ctx *eventfd);
};
/*