ebpf_exporter

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#include <vmlinux.h>
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#include <bpf/bpf_tracing.h>
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#include <bpf/bpf_core_read.h>
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#include "maps.bpf.h"
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#include "regs-ip.bpf.h"
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struct {
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    __uint(type, BPF_MAP_TYPE_HASH);
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    __uint(max_entries, 4);
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    __type(key, u64);
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    __type(value, u64);
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} page_cache_ops_total SEC(".maps");
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SEC("kprobe/add_to_page_cache_lru")
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int add_to_page_cache_lru(struct pt_regs *ctx)
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{
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    u64 ip = KPROBE_REGS_IP_FIX(PT_REGS_IP_CORE(ctx));
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    increment_map(&page_cache_ops_total, &ip, 1);
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    return 0;
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}
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SEC("kprobe/mark_page_accessed")
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int mark_page_accessed(struct pt_regs *ctx)
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{
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    u64 ip = KPROBE_REGS_IP_FIX(PT_REGS_IP_CORE(ctx));
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    increment_map(&page_cache_ops_total, &ip, 1);
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    return 0;
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}
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// This function is usually not visible.
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SEC("kprobe/folio_account_dirtied")
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int folio_account_dirtied(struct pt_regs *ctx)
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{
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    u64 ip = KPROBE_REGS_IP_FIX(PT_REGS_IP_CORE(ctx));
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    increment_map(&page_cache_ops_total, &ip, 1);
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    return 0;
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}
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SEC("kprobe/mark_buffer_dirty")
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int mark_buffer_dirty(struct pt_regs *ctx)
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{
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    u64 ip = KPROBE_REGS_IP_FIX(PT_REGS_IP_CORE(ctx));
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    increment_map(&page_cache_ops_total, &ip, 1);
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    return 0;
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}
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char LICENSE[] SEC("license") = "GPL";
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