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44 lines
963 B
44 lines
963 B
4 months ago
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// Copyright (c) PLUMgrid, Inc.
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// Licensed under the Apache License, Version 2.0 (the "License")
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struct Ptr {
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u64 ptr:64;
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};
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struct Counters {
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u64 stat1:64;
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u64 stat2:64;
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};
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Table<Ptr, Counters, FIXED_MATCH, AUTO> stats(1024);
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// example with on_valid syntax
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u32 sys_wr (struct proto::pt_regs *ctx) {
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struct Ptr key = {.ptr=ctx->di};
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struct Counters *leaf;
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leaf = stats[key];
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if leaf {
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atomic_add(leaf->stat2, 1);
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}
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log("sys_wr: %p\n", ctx->di);
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return 0;
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}
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// example with smallest available syntax
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// note: if stats[key] fails, program returns early
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u32 sys_rd (struct proto::pt_regs *ctx) {
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struct Ptr key = {.ptr=ctx->di};
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atomic_add(stats[key].stat1, 1);
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}
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// example with if/else case
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u32 sys_bpf (struct proto::pt_regs *ctx) {
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struct Ptr key = {.ptr=ctx->di};
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struct Counters *leaf;
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leaf = stats[key];
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if leaf {
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atomic_add(leaf->stat1, 1);
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} else {
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log("update %llx failed\n", ctx->di);
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}
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return 0;
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}
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