#include <linux/rwsem.h>
#include <linux/idr.h>
#include <linux/workqueue.h>
+#include <linux/xattr.h>
#ifdef CONFIG_CGROUPS
/* Define the enumeration of all builtin cgroup subsystems */
#define SUBSYS(_x) _x ## _subsys_id,
+#define IS_SUBSYS_ENABLED(option) IS_ENABLED(option)
enum cgroup_subsys_id {
#include <linux/cgroup_subsys.h>
- CGROUP_BUILTIN_SUBSYS_COUNT
+ CGROUP_SUBSYS_COUNT,
};
+#undef IS_SUBSYS_ENABLED
#undef SUBSYS
-/*
- * This define indicates the maximum number of subsystems that can be loaded
- * at once. We limit to this many since cgroupfs_root has subsys_bits to keep
- * track of all of them.
- */
-#define CGROUP_SUBSYS_COUNT (BITS_PER_BYTE*sizeof(unsigned long))
/* Per-subsystem/per-cgroup state maintained by the system. */
struct cgroup_subsys_state {
/* List of events which userspace want to receive */
struct list_head event_list;
spinlock_t event_list_lock;
+
+ /* directory xattrs */
+ struct simple_xattrs xattrs;
};
/*
/* CFTYPE_* flags */
unsigned int flags;
+ /* file xattrs */
+ struct simple_xattrs xattrs;
+
int (*open)(struct inode *inode, struct file *file);
ssize_t (*read)(struct cgroup *cgrp, struct cftype *cft,
struct file *file,
*/
struct cftype_set {
struct list_head node; /* chained at subsys->cftsets */
- const struct cftype *cfts;
+ struct cftype *cfts;
};
struct cgroup_scanner {
void *data;
};
-int cgroup_add_cftypes(struct cgroup_subsys *ss, const struct cftype *cfts);
-int cgroup_rm_cftypes(struct cgroup_subsys *ss, const struct cftype *cfts);
+int cgroup_add_cftypes(struct cgroup_subsys *ss, struct cftype *cfts);
+int cgroup_rm_cftypes(struct cgroup_subsys *ss, struct cftype *cfts);
int cgroup_is_removed(const struct cgroup *cgrp);
*/
bool __DEPRECATED_clear_css_refs;
+ /*
+ * If %false, this subsystem is properly hierarchical -
+ * configuration, resource accounting and restriction on a parent
+ * cgroup cover those of its children. If %true, hierarchy support
+ * is broken in some ways - some subsystems ignore hierarchy
+ * completely while others are only implemented half-way.
+ *
+ * It's now disallowed to create nested cgroups if the subsystem is
+ * broken and cgroup core will emit a warning message on such
+ * cases. Eventually, all subsystems will be made properly
+ * hierarchical and this will go away.
+ */
+ bool broken_hierarchy;
+ bool warned_broken_hierarchy;
+
#define MAX_CGROUP_TYPE_NAMELEN 32
const char *name;
};
#define SUBSYS(_x) extern struct cgroup_subsys _x ## _subsys;
+#define IS_SUBSYS_ENABLED(option) IS_BUILTIN(option)
#include <linux/cgroup_subsys.h>
+#undef IS_SUBSYS_ENABLED
#undef SUBSYS
static inline struct cgroup_subsys_state *cgroup_subsys_state(