From: Gu Bowen <gubowen5@huawei.com> hulk inclusion category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/ICA1GK -------------------------------- Add kfunc to get hugetlb information. Co-developed-by: GONG Ruiqi <gongruiqi1@huawei.com> Signed-off-by: GONG Ruiqi <gongruiqi1@huawei.com> Signed-off-by: Gu Bowen <gubowen5@huawei.com> --- kernel/bpf-rvi/common_kfuncs.c | 44 ++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/kernel/bpf-rvi/common_kfuncs.c b/kernel/bpf-rvi/common_kfuncs.c index 5c1ddb5ee175..03b7a94e2af6 100644 --- a/kernel/bpf-rvi/common_kfuncs.c +++ b/kernel/bpf-rvi/common_kfuncs.c @@ -16,6 +16,7 @@ #include <linux/timekeeping.h> #include <linux/time_namespace.h> #include <linux/cma.h> +#include <linux/hugetlb.h> #include <linux/btf_ids.h> #include <linux/bpf.h> @@ -186,6 +187,48 @@ __bpf_kfunc unsigned long bpf_mem_freecma(void) return global_zone_page_state(NR_FREE_CMA_PAGES); } +struct bpf_mem_hugepage { + unsigned long total; + unsigned long free; + unsigned long rsvd; + unsigned long surp; + unsigned long size; + unsigned long hugetlb; +}; + +#ifdef CONFIG_HUGETLB_PAGE +__bpf_kfunc int bpf_hugetlb_report_meminfo(struct bpf_mem_hugepage *hugepage_info) +{ + struct hstate *h; + unsigned long total = 0; + + if (!hugepages_supported()) + return -1; + + for_each_hstate(h) { + unsigned long count = h->nr_huge_pages; + + total += huge_page_size(h) * count; + + if (h == &default_hstate) { + hugepage_info->total = count; + hugepage_info->free = h->free_huge_pages; + hugepage_info->rsvd = h->resv_huge_pages; + hugepage_info->surp = h->surplus_huge_pages; + hugepage_info->size = huge_page_size(h) / SZ_1K; + } + } + + hugepage_info->hugetlb = total / SZ_1K; + return 0; +} +#else +__bpf_kfunc int bpf_hugetlb_report_meminfo(struct bpf_mem_hugepage *hugepage_info) +{ + return -1; +} +#endif + BTF_SET8_START(bpf_common_kfuncs_ids) BTF_ID_FLAGS(func, bpf_mem_cgroup_from_task, KF_RET_NULL | KF_RCU) BTF_ID_FLAGS(func, bpf_task_active_pid_ns, KF_TRUSTED_ARGS) @@ -207,6 +250,7 @@ BTF_ID_FLAGS(func, bpf_mem_file_pmdmapped) BTF_ID_FLAGS(func, bpf_mem_kreclaimable) BTF_ID_FLAGS(func, bpf_mem_totalcma) BTF_ID_FLAGS(func, bpf_mem_freecma) +BTF_ID_FLAGS(func, bpf_hugetlb_report_meminfo, KF_TRUSTED_ARGS) BTF_SET8_END(bpf_common_kfuncs_ids) static const struct btf_kfunc_id_set bpf_common_kfuncs_set = { -- 2.25.1