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 */ 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 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); 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); 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 96 static inline bool do_memsw_account(void) { return false; } 97 static inline bool memcg1_alloc_events(struct mem_cgroup *memcg) { return true; } 98 static inline void memcg1_free_events(struct mem_cgroup *memcg) {} 99 100 static inline void memcg1_memcg_init(struct mem_cgroup *memcg) {} 101 static inline void memcg1_remove_from_trees(struct mem_cgroup *memcg) {} 102 static inline void memcg1_soft_limit_reset(struct mem_cgroup *memcg) {} 103 static inline void memcg1_css_offline(struct mem_cgroup *memcg) {} 104 105 static inline bool memcg1_oom_prepare(struct mem_cgroup *memcg, bool *locked) 106 { 107 *locked = false; 108 return true; 109 } 110 static inline void memcg1_oom_finish(struct mem_cgroup *memcg, bool locked) {} 111 static inline void memcg1_oom_recover(struct mem_cgroup *memcg) {} 112 113 static inline void memcg1_commit_charge(struct folio *folio, 114 struct mem_cgroup *memcg) {} 115 116 static inline void memcg1_uncharge_batch(struct mem_cgroup *memcg, 117 unsigned long pgpgout, 118 unsigned long nr_memory, int nid) {} 119 120 static inline void memcg1_stat_format(struct mem_cgroup *memcg, struct seq_buf *s) {} 121 122 static inline void memcg1_account_kmem(struct mem_cgroup *memcg, int nr_pages) {} 123 static inline bool memcg1_tcpmem_active(struct mem_cgroup *memcg) { return false; } 124 static inline bool memcg1_charge_skmem(struct mem_cgroup *memcg, unsigned int nr_pages, 125 gfp_t gfp_mask) { return true; } 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