2 Copyright (c) 2004 The Regents of the University of Michigan.
5 Redistribution and use in source and binary forms, with or without
6 modification, are permitted provided that the following conditions
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18 THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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20 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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31 #include <sys/param.h>
32 #include <sys/socket.h>
34 #include <sys/types.h>
36 #include <netinet/in.h>
52 #define GSS_RPC_FILE "/proc/net/rpc/auth.sptlrpc.init/channel"
53 /* max allowed time for prime testing: 400 ms */
54 #define MAX_ALLOWED_TIME_FOR_PRIME 400000
58 * nfs4 in-kernel cache implementation make upcall failed directly
59 * if there's no listener detected. so here we should keep the init
60 * channel file open as possible as we can.
62 * unfortunately the proc doesn't support dir change notification.
63 * and when an entry get unlinked, we only got POLLIN event once,
64 * it's the only oppotunity we can close the file and startover.
69 static const char gss_rpc_channel_path[] =
70 "/proc/net/rpc/auth.sptlrpc.init/channel";
74 struct timespec halfsec = { .tv_sec = 0, .tv_nsec = 500000000 };
77 #if OPENSSL_VERSION_NUMBER >= 0x1010103fL
79 sk_speedtest_dh_valid(MAX_ALLOWED_TIME_FOR_PRIME);
83 printerr(1, "will use %d rounds for prime testing\n",
91 f = fopen(gss_rpc_channel_path, "r+");
93 printerr(4, "failed to open %s: %s\n",
94 gss_rpc_channel_path, strerror(errno));
95 nanosleep(&halfsec, NULL);
97 printerr(1, "successfully open %s\n",
98 gss_rpc_channel_path);
102 pollfd.fd = fileno(f);
103 pollfd.events = POLLIN;
106 ret = poll(&pollfd, 1, 1000);
110 printerr(0, "error return from poll: %s\n",
114 } else if (ret == 0) {
115 printerr(4, "poll timeout\n");
118 printerr(0, "bug: unexpected poll return %d\n",
122 if (pollfd.revents & POLLIN) {
123 if (handle_channel_request(f) < 0) {