Add kern.rpc.gss.client_max, to make it possible to bump it easily.
This can drastically lower the load on gssd(8) on large NFS servers. Submitted by: Per Andersson <pa at chalmers dot se> Reviewed by: rmacklem@ MFC after: 2 weeks Sponsored by: Chalmers University of Technology Differential Revision: https://reviews.freebsd.org/D18393
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=342114
@ -171,9 +171,22 @@ struct svc_rpc_gss_cookedcred {
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#define CLIENT_HASH_SIZE 256
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#define CLIENT_MAX 128
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u_int svc_rpc_gss_client_max = CLIENT_MAX;
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SYSCTL_NODE(_kern, OID_AUTO, rpc, CTLFLAG_RW, 0, "RPC");
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SYSCTL_NODE(_kern_rpc, OID_AUTO, gss, CTLFLAG_RW, 0, "GSS");
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SYSCTL_UINT(_kern_rpc_gss, OID_AUTO, client_max, CTLFLAG_RW,
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&svc_rpc_gss_client_max, 0,
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"Max number of rpc-gss clients");
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static u_int svc_rpc_gss_client_count;
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SYSCTL_UINT(_kern_rpc_gss, OID_AUTO, client_count, CTLFLAG_RD,
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&svc_rpc_gss_client_count, 0,
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"Number of rpc-gss clients");
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struct svc_rpc_gss_client_list svc_rpc_gss_client_hash[CLIENT_HASH_SIZE];
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struct svc_rpc_gss_client_list svc_rpc_gss_clients;
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static size_t svc_rpc_gss_client_count;
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static uint32_t svc_rpc_gss_next_clientid = 1;
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static void
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@ -669,7 +682,7 @@ svc_rpc_gss_timeout_clients(void)
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*/
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sx_xlock(&svc_rpc_gss_lock);
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client = TAILQ_LAST(&svc_rpc_gss_clients, svc_rpc_gss_client_list);
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while (svc_rpc_gss_client_count > CLIENT_MAX && client != NULL) {
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while (svc_rpc_gss_client_count > svc_rpc_gss_client_max && client != NULL) {
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svc_rpc_gss_forget_client_locked(client);
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sx_xunlock(&svc_rpc_gss_lock);
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svc_rpc_gss_release_client(client);
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