You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
44 lines
963 B
44 lines
963 B
// Copyright (c) PLUMgrid, Inc.
|
|
// Licensed under the Apache License, Version 2.0 (the "License")
|
|
struct Ptr {
|
|
u64 ptr:64;
|
|
};
|
|
struct Counters {
|
|
u64 stat1:64;
|
|
u64 stat2:64;
|
|
};
|
|
Table<Ptr, Counters, FIXED_MATCH, AUTO> stats(1024);
|
|
|
|
// example with on_valid syntax
|
|
u32 sys_wr (struct proto::pt_regs *ctx) {
|
|
struct Ptr key = {.ptr=ctx->di};
|
|
struct Counters *leaf;
|
|
leaf = stats[key];
|
|
if leaf {
|
|
atomic_add(leaf->stat2, 1);
|
|
}
|
|
log("sys_wr: %p\n", ctx->di);
|
|
return 0;
|
|
}
|
|
|
|
// example with smallest available syntax
|
|
// note: if stats[key] fails, program returns early
|
|
u32 sys_rd (struct proto::pt_regs *ctx) {
|
|
struct Ptr key = {.ptr=ctx->di};
|
|
atomic_add(stats[key].stat1, 1);
|
|
}
|
|
|
|
// example with if/else case
|
|
u32 sys_bpf (struct proto::pt_regs *ctx) {
|
|
struct Ptr key = {.ptr=ctx->di};
|
|
struct Counters *leaf;
|
|
leaf = stats[key];
|
|
if leaf {
|
|
atomic_add(leaf->stat1, 1);
|
|
} else {
|
|
log("update %llx failed\n", ctx->di);
|
|
}
|
|
return 0;
|
|
}
|
|
|