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#!/opt/rh/gcc-toolset-11/root/usr/bin/stap

global times%,op% /* arrays indexed by client-ip */
global maxage=300 /* seconds */

probe nfsd.proc.entries, nfsd.entries {
    times[client_ip] = gettimeofday_s()
    op[client_ip] = name /* operation name */
}
probe end, error, timer.s(10) {
    printf("\n")
    foreach (ip in times-)
        if (times[ip] > (gettimeofday_s()-maxage)) /* recent enough */
            printf("%s %s %s\n", ctime(times[ip]), ip, op[ip])
}