1 /* SPDX-License-Identifier: GPL-2.0 */
3 * linux/cgroup-defs.h - basic definitions for cgroup
5 * This file provides basic type and interface. Include this file directly
6 * only if necessary to avoid cyclic dependencies.
8 #ifndef _LINUX_CGROUP_DEFS_H
9 #define _LINUX_CGROUP_DEFS_H
11 #include <linux/limits.h>
12 #include <linux/list.h>
13 #include <linux/idr.h>
14 #include <linux/wait.h>
15 #include <linux/mutex.h>
16 #include <linux/rcupdate.h>
17 #include <linux/refcount.h>
18 #include <linux/percpu-refcount.h>
19 #include <linux/percpu-rwsem.h>
20 #include <linux/u64_stats_sync.h>
21 #include <linux/workqueue.h>
22 #include <linux/bpf-cgroup.h>
29 struct cgroup_taskset;
32 struct kernfs_open_file;
35 #define MAX_CGROUP_TYPE_NAMELEN 32
36 #define MAX_CGROUP_ROOT_NAMELEN 64
37 #define MAX_CFTYPE_NAME 64
39 /* define the enumeration of all cgroup subsystems */
40 #define SUBSYS(_x) _x ## _cgrp_id,
41 enum cgroup_subsys_id {
42 #include <linux/cgroup_subsys.h>
47 /* bits in struct cgroup_subsys_state flags field */
49 CSS_NO_REF = (1 << 0), /* no reference counting for this css */
50 CSS_ONLINE = (1 << 1), /* between ->css_online() and ->css_offline() */
51 CSS_RELEASED = (1 << 2), /* refcnt reached zero, released */
52 CSS_VISIBLE = (1 << 3), /* css is visible to userland */
53 CSS_DYING = (1 << 4), /* css is dying */
56 /* bits in struct cgroup flags field */
58 /* Control Group requires release notifications to userspace */
59 CGRP_NOTIFY_ON_RELEASE,
61 * Clone the parent's configuration when creating a new child
62 * cpuset cgroup. For historical reasons, this option can be
63 * specified at mount time and thus is implemented here.
65 CGRP_CPUSET_CLONE_CHILDREN,
68 /* cgroup_root->flags */
70 CGRP_ROOT_NOPREFIX = (1 << 1), /* mounted subsystems have no named prefix */
71 CGRP_ROOT_XATTR = (1 << 2), /* supports extended attributes */
74 * Consider namespaces as delegation boundaries. If this flag is
75 * set, controller specific interface files in a namespace root
76 * aren't writeable from inside the namespace.
78 CGRP_ROOT_NS_DELEGATE = (1 << 3),
81 * Enable cpuset controller in v1 cgroup to use v2 behavior.
83 CGRP_ROOT_CPUSET_V2_MODE = (1 << 4),
88 CFTYPE_ONLY_ON_ROOT = (1 << 0), /* only create on root cgrp */
89 CFTYPE_NOT_ON_ROOT = (1 << 1), /* don't create on root cgrp */
90 CFTYPE_NS_DELEGATABLE = (1 << 2), /* writeable beyond delegation boundaries */
92 CFTYPE_NO_PREFIX = (1 << 3), /* (DON'T USE FOR NEW FILES) no subsys prefix */
93 CFTYPE_WORLD_WRITABLE = (1 << 4), /* (DON'T USE FOR NEW FILES) S_IWUGO */
95 /* internal flags, do not use outside cgroup core proper */
96 __CFTYPE_ONLY_ON_DFL = (1 << 16), /* only on default hierarchy */
97 __CFTYPE_NOT_ON_DFL = (1 << 17), /* not on default hierarchy */
101 * cgroup_file is the handle for a file instance created in a cgroup which
102 * is used, for example, to generate file changed notifications. This can
103 * be obtained by setting cftype->file_offset.
106 /* do not access any fields from outside cgroup core */
107 struct kernfs_node *kn;
111 * Per-subsystem/per-cgroup state maintained by the system. This is the
112 * fundamental structural building block that controllers deal with.
114 * Fields marked with "PI:" are public and immutable and may be accessed
115 * directly without synchronization.
117 struct cgroup_subsys_state {
118 /* PI: the cgroup that this css is attached to */
119 struct cgroup *cgroup;
121 /* PI: the cgroup subsystem that this css is attached to */
122 struct cgroup_subsys *ss;
124 /* reference count - access via css_[try]get() and css_put() */
125 struct percpu_ref refcnt;
127 /* siblings list anchored at the parent's ->children */
128 struct list_head sibling;
129 struct list_head children;
132 * PI: Subsys-unique ID. 0 is unused and root is always 1. The
133 * matching css can be looked up using css_from_id().
140 * Monotonically increasing unique serial number which defines a
141 * uniform order among all csses. It's guaranteed that all
142 * ->children lists are in the ascending order of ->serial_nr and
143 * used to allow interrupting and resuming iterations.
148 * Incremented by online self and children. Used to guarantee that
149 * parents are not offlined before their children.
153 /* percpu_ref killing and RCU release */
154 struct rcu_head rcu_head;
155 struct work_struct destroy_work;
158 * PI: the parent css. Placed here for cache proximity to following
159 * fields of the containing structure.
161 struct cgroup_subsys_state *parent;
165 * A css_set is a structure holding pointers to a set of
166 * cgroup_subsys_state objects. This saves space in the task struct
167 * object and speeds up fork()/exit(), since a single inc/dec and a
168 * list_add()/del() can bump the reference count on the entire cgroup
173 * Set of subsystem states, one for each subsystem. This array is
174 * immutable after creation apart from the init_css_set during
175 * subsystem registration (at boot time).
177 struct cgroup_subsys_state *subsys[CGROUP_SUBSYS_COUNT];
179 /* reference count */
183 * For a domain cgroup, the following points to self. If threaded,
184 * to the matching cset of the nearest domain ancestor. The
185 * dom_cset provides access to the domain cgroup and its csses to
186 * which domain level resource consumptions should be charged.
188 struct css_set *dom_cset;
190 /* the default cgroup associated with this css_set */
191 struct cgroup *dfl_cgrp;
193 /* internal task count, protected by css_set_lock */
197 * Lists running through all tasks using this cgroup group.
198 * mg_tasks lists tasks which belong to this cset but are in the
199 * process of being migrated out or in. Protected by
200 * css_set_rwsem, but, during migration, once tasks are moved to
201 * mg_tasks, it can be read safely while holding cgroup_mutex.
203 struct list_head tasks;
204 struct list_head mg_tasks;
206 /* all css_task_iters currently walking this cset */
207 struct list_head task_iters;
210 * On the default hierarhcy, ->subsys[ssid] may point to a css
211 * attached to an ancestor instead of the cgroup this css_set is
212 * associated with. The following node is anchored at
213 * ->subsys[ssid]->cgroup->e_csets[ssid] and provides a way to
214 * iterate through all css's attached to a given cgroup.
216 struct list_head e_cset_node[CGROUP_SUBSYS_COUNT];
218 /* all threaded csets whose ->dom_cset points to this cset */
219 struct list_head threaded_csets;
220 struct list_head threaded_csets_node;
223 * List running through all cgroup groups in the same hash
224 * slot. Protected by css_set_lock
226 struct hlist_node hlist;
229 * List of cgrp_cset_links pointing at cgroups referenced from this
230 * css_set. Protected by css_set_lock.
232 struct list_head cgrp_links;
235 * List of csets participating in the on-going migration either as
236 * source or destination. Protected by cgroup_mutex.
238 struct list_head mg_preload_node;
239 struct list_head mg_node;
242 * If this cset is acting as the source of migration the following
243 * two fields are set. mg_src_cgrp and mg_dst_cgrp are
244 * respectively the source and destination cgroups of the on-going
245 * migration. mg_dst_cset is the destination cset the target tasks
246 * on this cset should be migrated to. Protected by cgroup_mutex.
248 struct cgroup *mg_src_cgrp;
249 struct cgroup *mg_dst_cgrp;
250 struct css_set *mg_dst_cset;
252 /* dead and being drained, ignore for migration */
255 /* For RCU-protected deletion */
256 struct rcu_head rcu_head;
260 * cgroup basic resource usage statistics. Accounting is done per-cpu in
261 * cgroup_cpu_stat which is then lazily propagated up the hierarchy on
264 * When a stat gets updated, the cgroup_cpu_stat and its ancestors are
265 * linked into the updated tree. On the following read, propagation only
266 * considers and consumes the updated tree. This makes reading O(the
267 * number of descendants which have been active since last read) instead of
268 * O(the total number of descendants).
270 * This is important because there can be a lot of (draining) cgroups which
271 * aren't active and stat may be read frequently. The combination can
272 * become very expensive. By propagating selectively, increasing reading
273 * frequency decreases the cost of each read.
275 struct cgroup_cpu_stat {
277 * ->sync protects all the current counters. These are the only
278 * fields which get updated in the hot path.
280 struct u64_stats_sync sync;
281 struct task_cputime cputime;
284 * Snapshots at the last reading. These are used to calculate the
285 * deltas to propagate to the global counters.
287 struct task_cputime last_cputime;
290 * Child cgroups with stat updates on this cpu since the last read
291 * are linked on the parent's ->updated_children through
294 * In addition to being more compact, singly-linked list pointing
295 * to the cgroup makes it unnecessary for each per-cpu struct to
296 * point back to the associated cgroup.
298 * Protected by per-cpu cgroup_cpu_stat_lock.
300 struct cgroup *updated_children; /* terminated by self cgroup */
301 struct cgroup *updated_next; /* NULL iff not on the list */
305 /* per-cpu statistics are collected into the folowing global counters */
306 struct task_cputime cputime;
307 struct prev_cputime prev_cputime;
311 /* self css with NULL ->ss, points back to this cgroup */
312 struct cgroup_subsys_state self;
314 unsigned long flags; /* "unsigned long" so bitops work */
317 * idr allocated in-hierarchy ID.
319 * ID 0 is not used, the ID of the root cgroup is always 1, and a
320 * new cgroup will be assigned with a smallest available ID.
322 * Allocating/Removing ID must be protected by cgroup_mutex.
327 * The depth this cgroup is at. The root is at depth zero and each
328 * step down the hierarchy increments the level. This along with
329 * ancestor_ids[] can determine whether a given cgroup is a
330 * descendant of another without traversing the hierarchy.
334 /* Maximum allowed descent tree depth */
338 * Keep track of total numbers of visible and dying descent cgroups.
339 * Dying cgroups are cgroups which were deleted by a user,
340 * but are still existing because someone else is holding a reference.
341 * max_descendants is a maximum allowed number of descent cgroups.
344 int nr_dying_descendants;
348 * Each non-empty css_set associated with this cgroup contributes
349 * one to nr_populated_csets. The counter is zero iff this cgroup
350 * doesn't have any tasks.
352 * All children which have non-zero nr_populated_csets and/or
353 * nr_populated_children of their own contribute one to either
354 * nr_populated_domain_children or nr_populated_threaded_children
355 * depending on their type. Each counter is zero iff all cgroups
356 * of the type in the subtree proper don't have any tasks.
358 int nr_populated_csets;
359 int nr_populated_domain_children;
360 int nr_populated_threaded_children;
362 int nr_threaded_children; /* # of live threaded child cgroups */
364 struct kernfs_node *kn; /* cgroup kernfs entry */
365 struct cgroup_file procs_file; /* handle for "cgroup.procs" */
366 struct cgroup_file events_file; /* handle for "cgroup.events" */
369 * The bitmask of subsystems enabled on the child cgroups.
370 * ->subtree_control is the one configured through
371 * "cgroup.subtree_control" while ->child_ss_mask is the effective
372 * one which may have more subsystems enabled. Controller knobs
373 * are made available iff it's enabled in ->subtree_control.
377 u16 old_subtree_control;
378 u16 old_subtree_ss_mask;
380 /* Private pointers for each registered subsystem */
381 struct cgroup_subsys_state __rcu *subsys[CGROUP_SUBSYS_COUNT];
383 struct cgroup_root *root;
386 * List of cgrp_cset_links pointing at css_sets with tasks in this
387 * cgroup. Protected by css_set_lock.
389 struct list_head cset_links;
392 * On the default hierarchy, a css_set for a cgroup with some
393 * susbsys disabled will point to css's which are associated with
394 * the closest ancestor which has the subsys enabled. The
395 * following lists all css_sets which point to this cgroup's css
396 * for the given subsystem.
398 struct list_head e_csets[CGROUP_SUBSYS_COUNT];
401 * If !threaded, self. If threaded, it points to the nearest
402 * domain ancestor. Inside a threaded subtree, cgroups are exempt
403 * from process granularity and no-internal-task constraint.
404 * Domain level resource consumptions which aren't tied to a
405 * specific task are charged to the dom_cgrp.
407 struct cgroup *dom_cgrp;
409 /* cgroup basic resource statistics */
410 struct cgroup_cpu_stat __percpu *cpu_stat;
411 struct cgroup_stat pending_stat; /* pending from children */
412 struct cgroup_stat stat;
415 * list of pidlists, up to two for each namespace (one for procs, one
416 * for tasks); created on demand.
418 struct list_head pidlists;
419 struct mutex pidlist_mutex;
421 /* used to wait for offlining of csses */
422 wait_queue_head_t offline_waitq;
424 /* used to schedule release agent */
425 struct work_struct release_agent_work;
427 /* used to store eBPF programs */
428 struct cgroup_bpf bpf;
430 /* ids of the ancestors at each level including self */
435 * A cgroup_root represents the root of a cgroup hierarchy, and may be
436 * associated with a kernfs_root to form an active hierarchy. This is
437 * internal to cgroup core. Don't access directly from controllers.
440 struct kernfs_root *kf_root;
442 /* The bitmask of subsystems attached to this hierarchy */
443 unsigned int subsys_mask;
445 /* Unique id for this hierarchy. */
448 /* The root cgroup. Root is destroyed on its release. */
451 /* for cgrp->ancestor_ids[0] */
452 int cgrp_ancestor_id_storage;
454 /* Number of cgroups in the hierarchy, used only for /proc/cgroups */
457 /* A list running through the active hierarchies */
458 struct list_head root_list;
460 /* Hierarchy-specific flags */
463 /* IDs for cgroups in this hierarchy */
464 struct idr cgroup_idr;
466 /* The path to use for release notifications. */
467 char release_agent_path[PATH_MAX];
469 /* The name for this hierarchy - may be empty */
470 char name[MAX_CGROUP_ROOT_NAMELEN];
474 * struct cftype: handler definitions for cgroup control files
476 * When reading/writing to a file:
477 * - the cgroup to use is file->f_path.dentry->d_parent->d_fsdata
478 * - the 'cftype' of the file is file->f_path.dentry->d_fsdata
482 * By convention, the name should begin with the name of the
483 * subsystem, followed by a period. Zero length string indicates
484 * end of cftype array.
486 char name[MAX_CFTYPE_NAME];
487 unsigned long private;
490 * The maximum length of string, excluding trailing nul, that can
491 * be passed to write. If < PAGE_SIZE-1, PAGE_SIZE-1 is assumed.
493 size_t max_write_len;
499 * If non-zero, should contain the offset from the start of css to
500 * a struct cgroup_file field. cgroup will record the handle of
501 * the created file into it. The recorded handle can be used as
502 * long as the containing css remains accessible.
504 unsigned int file_offset;
507 * Fields used for internal bookkeeping. Initialized automatically
508 * during registration.
510 struct cgroup_subsys *ss; /* NULL for cgroup core files */
511 struct list_head node; /* anchored at ss->cfts */
512 struct kernfs_ops *kf_ops;
514 int (*open)(struct kernfs_open_file *of);
515 void (*release)(struct kernfs_open_file *of);
518 * read_u64() is a shortcut for the common case of returning a
519 * single integer. Use it in place of read()
521 u64 (*read_u64)(struct cgroup_subsys_state *css, struct cftype *cft);
523 * read_s64() is a signed version of read_u64()
525 s64 (*read_s64)(struct cgroup_subsys_state *css, struct cftype *cft);
527 /* generic seq_file read interface */
528 int (*seq_show)(struct seq_file *sf, void *v);
530 /* optional ops, implement all or none */
531 void *(*seq_start)(struct seq_file *sf, loff_t *ppos);
532 void *(*seq_next)(struct seq_file *sf, void *v, loff_t *ppos);
533 void (*seq_stop)(struct seq_file *sf, void *v);
536 * write_u64() is a shortcut for the common case of accepting
537 * a single integer (as parsed by simple_strtoull) from
538 * userspace. Use in place of write(); return 0 or error.
540 int (*write_u64)(struct cgroup_subsys_state *css, struct cftype *cft,
543 * write_s64() is a signed version of write_u64()
545 int (*write_s64)(struct cgroup_subsys_state *css, struct cftype *cft,
549 * write() is the generic write callback which maps directly to
550 * kernfs write operation and overrides all other operations.
551 * Maximum write size is determined by ->max_write_len. Use
552 * of_css/cft() to access the associated css and cft.
554 ssize_t (*write)(struct kernfs_open_file *of,
555 char *buf, size_t nbytes, loff_t off);
557 #ifdef CONFIG_DEBUG_LOCK_ALLOC
558 struct lock_class_key lockdep_key;
563 * Control Group subsystem type.
564 * See Documentation/cgroups/cgroups.txt for details
566 struct cgroup_subsys {
567 struct cgroup_subsys_state *(*css_alloc)(struct cgroup_subsys_state *parent_css);
568 int (*css_online)(struct cgroup_subsys_state *css);
569 void (*css_offline)(struct cgroup_subsys_state *css);
570 void (*css_released)(struct cgroup_subsys_state *css);
571 void (*css_free)(struct cgroup_subsys_state *css);
572 void (*css_reset)(struct cgroup_subsys_state *css);
573 int (*css_extra_stat_show)(struct seq_file *seq,
574 struct cgroup_subsys_state *css);
576 int (*can_attach)(struct cgroup_taskset *tset);
577 void (*cancel_attach)(struct cgroup_taskset *tset);
578 void (*attach)(struct cgroup_taskset *tset);
579 void (*post_attach)(void);
580 int (*can_fork)(struct task_struct *task);
581 void (*cancel_fork)(struct task_struct *task);
582 void (*fork)(struct task_struct *task);
583 void (*exit)(struct task_struct *task);
584 void (*free)(struct task_struct *task);
585 void (*bind)(struct cgroup_subsys_state *root_css);
590 * If %true, the controller, on the default hierarchy, doesn't show
591 * up in "cgroup.controllers" or "cgroup.subtree_control", is
592 * implicitly enabled on all cgroups on the default hierarchy, and
593 * bypasses the "no internal process" constraint. This is for
594 * utility type controllers which is transparent to userland.
596 * An implicit controller can be stolen from the default hierarchy
597 * anytime and thus must be okay with offline csses from previous
598 * hierarchies coexisting with csses for the current one.
600 bool implicit_on_dfl:1;
603 * If %true, the controller, supports threaded mode on the default
604 * hierarchy. In a threaded subtree, both process granularity and
605 * no-internal-process constraint are ignored and a threaded
606 * controllers should be able to handle that.
608 * Note that as an implicit controller is automatically enabled on
609 * all cgroups on the default hierarchy, it should also be
610 * threaded. implicit && !threaded is not supported.
615 * If %false, this subsystem is properly hierarchical -
616 * configuration, resource accounting and restriction on a parent
617 * cgroup cover those of its children. If %true, hierarchy support
618 * is broken in some ways - some subsystems ignore hierarchy
619 * completely while others are only implemented half-way.
621 * It's now disallowed to create nested cgroups if the subsystem is
622 * broken and cgroup core will emit a warning message on such
623 * cases. Eventually, all subsystems will be made properly
624 * hierarchical and this will go away.
626 bool broken_hierarchy:1;
627 bool warned_broken_hierarchy:1;
629 /* the following two fields are initialized automtically during boot */
633 /* optional, initialized automatically during boot if not set */
634 const char *legacy_name;
636 /* link to parent, protected by cgroup_lock() */
637 struct cgroup_root *root;
639 /* idr for css->id */
643 * List of cftypes. Each entry is the first entry of an array
644 * terminated by zero length name.
646 struct list_head cfts;
649 * Base cftypes which are automatically registered. The two can
650 * point to the same array.
652 struct cftype *dfl_cftypes; /* for the default hierarchy */
653 struct cftype *legacy_cftypes; /* for the legacy hierarchies */
656 * A subsystem may depend on other subsystems. When such subsystem
657 * is enabled on a cgroup, the depended-upon subsystems are enabled
658 * together if available. Subsystems enabled due to dependency are
659 * not visible to userland until explicitly enabled. The following
660 * specifies the mask of subsystems that this one depends on.
662 unsigned int depends_on;
665 extern struct percpu_rw_semaphore cgroup_threadgroup_rwsem;
668 * cgroup_threadgroup_change_begin - threadgroup exclusion for cgroups
671 * Allows cgroup operations to synchronize against threadgroup changes
672 * using a percpu_rw_semaphore.
674 static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
676 percpu_down_read(&cgroup_threadgroup_rwsem);
680 * cgroup_threadgroup_change_end - threadgroup exclusion for cgroups
683 * Counterpart of cgroup_threadcgroup_change_begin().
685 static inline void cgroup_threadgroup_change_end(struct task_struct *tsk)
687 percpu_up_read(&cgroup_threadgroup_rwsem);
690 #else /* CONFIG_CGROUPS */
692 #define CGROUP_SUBSYS_COUNT 0
694 static inline void cgroup_threadgroup_change_begin(struct task_struct *tsk)
699 static inline void cgroup_threadgroup_change_end(struct task_struct *tsk) {}
701 #endif /* CONFIG_CGROUPS */
703 #ifdef CONFIG_SOCK_CGROUP_DATA
706 * sock_cgroup_data is embedded at sock->sk_cgrp_data and contains
707 * per-socket cgroup information except for memcg association.
709 * On legacy hierarchies, net_prio and net_cls controllers directly set
710 * attributes on each sock which can then be tested by the network layer.
711 * On the default hierarchy, each sock is associated with the cgroup it was
712 * created in and the networking layer can match the cgroup directly.
714 * To avoid carrying all three cgroup related fields separately in sock,
715 * sock_cgroup_data overloads (prioidx, classid) and the cgroup pointer.
716 * On boot, sock_cgroup_data records the cgroup that the sock was created
717 * in so that cgroup2 matches can be made; however, once either net_prio or
718 * net_cls starts being used, the area is overriden to carry prioidx and/or
719 * classid. The two modes are distinguished by whether the lowest bit is
720 * set. Clear bit indicates cgroup pointer while set bit prioidx and
723 * While userland may start using net_prio or net_cls at any time, once
724 * either is used, cgroup2 matching no longer works. There is no reason to
725 * mix the two and this is in line with how legacy and v2 compatibility is
726 * handled. On mode switch, cgroup references which are already being
727 * pointed to by socks may be leaked. While this can be remedied by adding
728 * synchronization around sock_cgroup_data, given that the number of leaked
729 * cgroups is bound and highly unlikely to be high, this seems to be the
732 struct sock_cgroup_data {
734 #ifdef __LITTLE_ENDIAN
754 * There's a theoretical window where the following accessors race with
755 * updaters and return part of the previous pointer as the prioidx or
756 * classid. Such races are short-lived and the result isn't critical.
758 static inline u16 sock_cgroup_prioidx(struct sock_cgroup_data *skcd)
760 /* fallback to 1 which is always the ID of the root cgroup */
761 return (skcd->is_data & 1) ? skcd->prioidx : 1;
764 static inline u32 sock_cgroup_classid(struct sock_cgroup_data *skcd)
766 /* fallback to 0 which is the unconfigured default classid */
767 return (skcd->is_data & 1) ? skcd->classid : 0;
771 * If invoked concurrently, the updaters may clobber each other. The
772 * caller is responsible for synchronization.
774 static inline void sock_cgroup_set_prioidx(struct sock_cgroup_data *skcd,
777 struct sock_cgroup_data skcd_buf = {{ .val = READ_ONCE(skcd->val) }};
779 if (sock_cgroup_prioidx(&skcd_buf) == prioidx)
782 if (!(skcd_buf.is_data & 1)) {
784 skcd_buf.is_data = 1;
787 skcd_buf.prioidx = prioidx;
788 WRITE_ONCE(skcd->val, skcd_buf.val); /* see sock_cgroup_ptr() */
791 static inline void sock_cgroup_set_classid(struct sock_cgroup_data *skcd,
794 struct sock_cgroup_data skcd_buf = {{ .val = READ_ONCE(skcd->val) }};
796 if (sock_cgroup_classid(&skcd_buf) == classid)
799 if (!(skcd_buf.is_data & 1)) {
801 skcd_buf.is_data = 1;
804 skcd_buf.classid = classid;
805 WRITE_ONCE(skcd->val, skcd_buf.val); /* see sock_cgroup_ptr() */
808 #else /* CONFIG_SOCK_CGROUP_DATA */
810 struct sock_cgroup_data {
813 #endif /* CONFIG_SOCK_CGROUP_DATA */
815 #endif /* _LINUX_CGROUP_DEFS_H */