// SPDX-License-Identifier: GPL-2.0 /* Copyright (c) 2025 Meta Platforms, Inc. and affiliates. */ #include <vmlinux.h> #include <bpf/bpf_core_read.h> #include "cgroup_iter_memcg.h" char _license[] SEC("license") = "GPL"; /* The latest values read are stored here. */ struct memcg_query memcg_query SEC(".data.query"); SEC("iter.s/cgroup") int cgroup_memcg_query(struct bpf_iter__cgroup *ctx) { struct cgroup *cgrp = ctx->cgroup; struct cgroup_subsys_state *css; struct mem_cgroup *memcg; if (!cgrp) return 1; css = &cgrp->self; memcg = bpf_get_mem_cgroup(css); if (!memcg) return 1; bpf_mem_cgroup_flush_stats(memcg); memcg_query.nr_anon_mapped = bpf_mem_cgroup_page_state( memcg, bpf_core_enum_value(enum node_stat_item, NR_ANON_MAPPED)); memcg_query.nr_shmem = bpf_mem_cgroup_page_state( memcg, bpf_core_enum_value(enum node_stat_item, NR_SHMEM)); memcg_query.nr_file_pages = bpf_mem_cgroup_page_state( memcg, bpf_core_enum_value(enum node_stat_item, NR_FILE_PAGES)); memcg_query.nr_file_mapped = bpf_mem_cgroup_page_state( memcg, bpf_core_enum_value(enum node_stat_item, NR_FILE_MAPPED)); memcg_query.pgfault = bpf_mem_cgroup_vm_events( memcg, bpf_core_enum_value(enum vm_event_item, PGFAULT)); bpf_put_mem_cgroup(memcg); return 0; }