1 /* SPDX-License-Identifier: GPL-2.0-or-later */
2
3 #ifndef __MM_MEMCONTROL_V1_H
4 #define __MM_MEMCONTROL_V1_H
5
6 #include <linux/cgroup-defs.h>
7 #include <linux/memcontrol.h>
8
9 /* Cgroup v1 and v2 common declarations */
10
11 /*
12 * Iteration constructs for visiting all cgroups (under a tree). If
13 * loops are exited prematurely (break), mem_cgroup_iter_break() must
14 * be used for reference counting.
15 */
16 #define for_each_mem_cgroup_tree(iter, root) \
17 for (iter = mem_cgroup_iter(root, NULL, NULL); \
18 iter != NULL; \
19 iter = mem_cgroup_iter(root, iter, NULL))
20
21 void drain_all_stock(struct mem_cgroup *root_memcg);
22
23 int memory_stat_show(struct seq_file *m, void *v);
24
25 struct mem_cgroup *mem_cgroup_private_id_get_online(struct mem_cgroup *memcg,
26 unsigned int n);
27
28 /* Cgroup v1-specific declarations */
29 #ifdef CONFIG_MEMCG_V1
30
31 /* Whether legacy memory+swap accounting is active */
do_memsw_account(void)32 static inline bool do_memsw_account(void)
33 {
34 return !cgroup_subsys_on_dfl(memory_cgrp_subsys);
35 }
36
37 unsigned long memcg_events_local(struct mem_cgroup *memcg, int event);
38 unsigned long memcg_page_state_local(struct mem_cgroup *memcg, int idx);
39 unsigned long memcg_page_state_local_output(struct mem_cgroup *memcg, int item);
40 bool memcg1_alloc_events(struct mem_cgroup *memcg);
41 void memcg1_free_events(struct mem_cgroup *memcg);
42
43 void memcg1_memcg_init(struct mem_cgroup *memcg);
44 void memcg1_remove_from_trees(struct mem_cgroup *memcg);
45
memcg1_soft_limit_reset(struct mem_cgroup * memcg)46 static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg)
47 {
48 WRITE_ONCE(memcg->soft_limit, PAGE_COUNTER_MAX);
49 }
50
51 struct cgroup_taskset;
52 void memcg1_css_offline(struct mem_cgroup *memcg);
53
54 /* for encoding cft->private value on file */
55 enum res_type {
56 _MEM,
57 _MEMSWAP,
58 _KMEM,
59 _TCP,
60 };
61
62 bool memcg1_oom_prepare(struct mem_cgroup *memcg, bool *locked);
63 void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked);
64 void memcg1_oom_recover(struct mem_cgroup *memcg);
65
66 void memcg1_commit_charge(struct folio *folio, struct mem_cgroup *memcg);
67 void memcg1_uncharge_batch(struct mem_cgroup *memcg, unsigned long pgpgout,
68 unsigned long nr_memory, int nid);
69
70 void memcg1_stat_format(struct mem_cgroup *memcg, struct seq_buf *s);
71 void reparent_memcg1_state_local(struct mem_cgroup *memcg, struct mem_cgroup *parent);
72 void reparent_memcg1_lruvec_state_local(struct mem_cgroup *memcg, struct mem_cgroup *parent);
73
74 void reparent_memcg_state_local(struct mem_cgroup *memcg,
75 struct mem_cgroup *parent, int idx);
76 void reparent_memcg_lruvec_state_local(struct mem_cgroup *memcg,
77 struct mem_cgroup *parent, int idx);
78
79 void memcg1_account_kmem(struct mem_cgroup *memcg, int nr_pages);
memcg1_tcpmem_active(struct mem_cgroup * memcg)80 static inline bool memcg1_tcpmem_active(struct mem_cgroup *memcg)
81 {
82 return memcg->tcpmem_active;
83 }
84 bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages,
85 gfp_t gfp_mask);
memcg1_uncharge_skmem(struct mem_cgroup * memcg,unsigned int nr_pages)86 static inline void memcg1_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages)
87 {
88 page_counter_uncharge(&memcg->tcpmem, nr_pages);
89 }
90
91 extern struct cftype memsw_files[];
92 extern struct cftype mem_cgroup_legacy_files[];
93
94 #else /* CONFIG_MEMCG_V1 */
95
do_memsw_account(void)96 static inline bool do_memsw_account(void) { return false; }
memcg1_alloc_events(struct mem_cgroup * memcg)97 static inline bool memcg1_alloc_events(struct mem_cgroup *memcg) { return true; }
memcg1_free_events(struct mem_cgroup * memcg)98 static inline void memcg1_free_events(struct mem_cgroup *memcg) {}
99
memcg1_memcg_init(struct mem_cgroup * memcg)100 static inline void memcg1_memcg_init(struct mem_cgroup *memcg) {}
memcg1_remove_from_trees(struct mem_cgroup * memcg)101 static inline void memcg1_remove_from_trees(struct mem_cgroup *memcg) {}
memcg1_soft_limit_reset(struct mem_cgroup * memcg)102 static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) {}
memcg1_css_offline(struct mem_cgroup * memcg)103 static inline void memcg1_css_offline(struct mem_cgroup *memcg) {}
104
memcg1_oom_prepare(struct mem_cgroup * memcg,bool * locked)105 static inline bool memcg1_oom_prepare(struct mem_cgroup *memcg, bool *locked)
106 {
107 *locked = false;
108 return true;
109 }
memcg1_oom_finish(struct mem_cgroup * memcg,bool locked)110 static inline void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked) {}
memcg1_oom_recover(struct mem_cgroup * memcg)111 static inline void memcg1_oom_recover(struct mem_cgroup *memcg) {}
112
memcg1_commit_charge(struct folio * folio,struct mem_cgroup * memcg)113 static inline void memcg1_commit_charge(struct folio *folio,
114 struct mem_cgroup *memcg) {}
115
memcg1_uncharge_batch(struct mem_cgroup * memcg,unsigned long pgpgout,unsigned long nr_memory,int nid)116 static inline void memcg1_uncharge_batch(struct mem_cgroup *memcg,
117 unsigned long pgpgout,
118 unsigned long nr_memory, int nid) {}
119
memcg1_stat_format(struct mem_cgroup * memcg,struct seq_buf * s)120 static inline void memcg1_stat_format(struct mem_cgroup *memcg, struct seq_buf *s) {}
121
memcg1_account_kmem(struct mem_cgroup * memcg,int nr_pages)122 static inline void memcg1_account_kmem(struct mem_cgroup *memcg, int nr_pages) {}
memcg1_tcpmem_active(struct mem_cgroup * memcg)123 static inline bool memcg1_tcpmem_active(struct mem_cgroup *memcg) { return false; }
memcg1_charge_skmem(struct mem_cgroup * memcg,unsigned int nr_pages,gfp_t gfp_mask)124 static inline bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages,
125 gfp_t gfp_mask) { return true; }
memcg1_uncharge_skmem(struct mem_cgroup * memcg,unsigned int nr_pages)126 static inline void memcg1_uncharge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages) {}
127
128 #endif /* CONFIG_MEMCG_V1 */
129
130 #endif /* __MM_MEMCONTROL_V1_H */
131