#include <linux/nodemask.h>
#include <linux/rcupdate.h>
#include <linux/cgroupstats.h>
+#include <linux/prio_heap.h>
#ifdef CONFIG_CGROUPS
__css_put(css);
}
+/* bits in struct cgroup flags field */
+enum {
+ /* Control Group is dead */
+ CGRP_REMOVED,
+ /* Control Group has previously had a child cgroup or a task,
+ * but no longer (only if CGRP_NOTIFY_ON_RELEASE is set) */
+ CGRP_RELEASABLE,
+ /* Control Group requires release notifications to userspace */
+ CGRP_NOTIFY_ON_RELEASE,
+};
+
struct cgroup {
unsigned long flags; /* "unsigned long" so bitops work */
*/
struct list_head list;
+ /*
+ * List running through all cgroup groups in the same hash
+ * slot. Protected by css_set_lock
+ */
+ struct hlist_node hlist;
+
/*
* List running through all tasks using this cgroup
* group. Protected by css_set_lock
* during subsystem registration (at boot time).
*/
struct cgroup_subsys_state *subsys[CGROUP_SUBSYS_COUNT];
+};
+
+/*
+ * 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:
*
*
* When reading/writing to a file:
- * - the cgroup to use in file->f_dentry->d_parent->d_fsdata
+ * - the cgroup to use is file->f_dentry->d_parent->d_fsdata
* - the 'cftype' of the file is file->f_dentry->d_fsdata
*/
char name[MAX_CFTYPE_NAME];
int private;
int (*open) (struct inode *inode, struct file *file);
- ssize_t (*read) (struct cgroup *cont, struct cftype *cft,
+ ssize_t (*read) (struct cgroup *cgrp, struct cftype *cft,
struct file *file,
char __user *buf, size_t nbytes, loff_t *ppos);
/*
- * read_uint() is a shortcut for the common case of returning a
+ * read_u64() is a shortcut for the common case of returning a
* single integer. Use it in place of read()
*/
- u64 (*read_uint) (struct cgroup *cont, struct cftype *cft);
- ssize_t (*write) (struct cgroup *cont, struct cftype *cft,
+ u64 (*read_u64) (struct cgroup *cgrp, struct cftype *cft);
+ /*
+ * read_s64() is a signed version of read_u64()
+ */
+ s64 (*read_s64) (struct cgroup *cgrp, 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 *cont, struct cftype *cft,
+ struct cgroup_map_cb *cb);
+
+ ssize_t (*write) (struct cgroup *cgrp, struct cftype *cft,
struct file *file,
const char __user *buf, size_t nbytes, loff_t *ppos);
/*
- * write_uint() is a shortcut for the common case of accepting
+ * write_u64() is a shortcut for the common case of accepting
* a single integer (as parsed by simple_strtoull) from
* userspace. Use in place of write(); return 0 or error.
*/
- int (*write_uint) (struct cgroup *cont, struct cftype *cft, u64 val);
+ int (*write_u64) (struct cgroup *cgrp, 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);
+
+ /*
+ * trigger() callback can be used to get some kick from the
+ * userspace, when the actual string written is not important
+ * at all. The private field can be used to determine the
+ * kick type for multiplexing.
+ */
+ int (*trigger)(struct cgroup *cgrp, unsigned int event);
int (*release) (struct inode *inode, struct file *file);
};
+struct cgroup_scanner {
+ struct cgroup *cg;
+ int (*test_task)(struct task_struct *p, struct cgroup_scanner *scan);
+ void (*process_task)(struct task_struct *p,
+ struct cgroup_scanner *scan);
+ struct ptr_heap *heap;
+};
+
/* Add a new file to the given cgroup directory. Should only be
* called by subsystems from within a populate() method */
-int cgroup_add_file(struct cgroup *cont, struct cgroup_subsys *subsys,
+int cgroup_add_file(struct cgroup *cgrp, struct cgroup_subsys *subsys,
const struct cftype *cft);
/* Add a set of new files to the given cgroup directory. Should
* only be called by subsystems from within a populate() method */
-int cgroup_add_files(struct cgroup *cont,
+int cgroup_add_files(struct cgroup *cgrp,
struct cgroup_subsys *subsys,
const struct cftype cft[],
int count);
-int cgroup_is_removed(const struct cgroup *cont);
+int cgroup_is_removed(const struct cgroup *cgrp);
-int cgroup_path(const struct cgroup *cont, char *buf, int buflen);
+int cgroup_path(const struct cgroup *cgrp, char *buf, int buflen);
-int cgroup_task_count(const struct cgroup *cont);
+int cgroup_task_count(const struct cgroup *cgrp);
/* Return true if the cgroup is a descendant of the current cgroup */
-int cgroup_is_descendant(const struct cgroup *cont);
+int cgroup_is_descendant(const struct cgroup *cgrp);
/* Control Group subsystem type. See Documentation/cgroups.txt for details */
struct cgroup_subsys {
struct cgroup_subsys_state *(*create)(struct cgroup_subsys *ss,
- struct cgroup *cont);
- void (*destroy)(struct cgroup_subsys *ss, struct cgroup *cont);
+ struct cgroup *cgrp);
+ void (*pre_destroy)(struct cgroup_subsys *ss, struct cgroup *cgrp);
+ void (*destroy)(struct cgroup_subsys *ss, struct cgroup *cgrp);
int (*can_attach)(struct cgroup_subsys *ss,
- struct cgroup *cont, struct task_struct *tsk);
- void (*attach)(struct cgroup_subsys *ss, struct cgroup *cont,
- struct cgroup *old_cont, struct task_struct *tsk);
+ struct cgroup *cgrp, struct task_struct *tsk);
+ void (*attach)(struct cgroup_subsys *ss, struct cgroup *cgrp,
+ struct cgroup *old_cgrp, struct task_struct *tsk);
void (*fork)(struct cgroup_subsys *ss, struct task_struct *task);
void (*exit)(struct cgroup_subsys *ss, struct task_struct *task);
int (*populate)(struct cgroup_subsys *ss,
- struct cgroup *cont);
- void (*post_clone)(struct cgroup_subsys *ss, struct cgroup *cont);
+ struct cgroup *cgrp);
+ void (*post_clone)(struct cgroup_subsys *ss, struct cgroup *cgrp);
void (*bind)(struct cgroup_subsys *ss, struct cgroup *root);
int subsys_id;
int active;
+ int disabled;
int early_init;
#define MAX_CGROUP_TYPE_NAMELEN 32
const char *name;
#undef SUBSYS
static inline struct cgroup_subsys_state *cgroup_subsys_state(
- struct cgroup *cont, int subsys_id)
+ struct cgroup *cgrp, int subsys_id)
{
- return cont->subsys[subsys_id];
+ return cgrp->subsys[subsys_id];
}
static inline struct cgroup_subsys_state *task_subsys_state(
return task_subsys_state(task, subsys_id)->cgroup;
}
-int cgroup_path(const struct cgroup *cont, char *buf, int buflen);
-
int cgroup_clone(struct task_struct *tsk, struct cgroup_subsys *ss);
/* A cgroup_iter should be treated as an opaque object */
* returns NULL or until you want to end the iteration
*
* 3) call cgroup_iter_end() to destroy the iterator.
+ *
+ * Or, call cgroup_scan_tasks() to iterate through every task in a cpuset.
+ * - cgroup_scan_tasks() holds the css_set_lock when calling the test_task()
+ * callback, but not while calling the process_task() callback.
*/
-void cgroup_iter_start(struct cgroup *cont, struct cgroup_iter *it);
-struct task_struct *cgroup_iter_next(struct cgroup *cont,
+void cgroup_iter_start(struct cgroup *cgrp, struct cgroup_iter *it);
+struct task_struct *cgroup_iter_next(struct cgroup *cgrp,
struct cgroup_iter *it);
-void cgroup_iter_end(struct cgroup *cont, struct cgroup_iter *it);
+void cgroup_iter_end(struct cgroup *cgrp, struct cgroup_iter *it);
+int cgroup_scan_tasks(struct cgroup_scanner *scan);
+int cgroup_attach_task(struct cgroup *, struct task_struct *);
#else /* !CONFIG_CGROUPS */
projects / linux-2.6-omap-h63xx.git / blobdiff