c526611dd6
The kernel's rpcbind client creates and deletes an rpc_clnt and its underlying transport socket for every upcall to the local rpcbind daemon. When starting a typical NFS server on IPv4 and IPv6, the NFS service itself does three upcalls (one per version) times two upcalls (one per transport) times two upcalls (one per address family), making 12, plus another one for the initial call to unregister previous NFS services. Starting the NLM service adds an additional 13 upcalls, for similar reasons. (Currently the NFS service doesn't start IPv6 listeners, but it will soon enough). Instead, let's create an rpc_clnt for rpcbind upcalls during the first local rpcbind query, and cache it. This saves the overhead of creating and destroying an rpc_clnt and a socket for every upcall. The new logic also prevents the kernel from attempting an RPCB_SET or RPCB_UNSET if it knows from the start that the local portmapper does not support rpcbind protocol version 4. This will cut down on the number of rpcbind upcalls in legacy environments. Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
76 lines
1.6 KiB
C
76 lines
1.6 KiB
C
/*
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* linux/net/sunrpc/sunrpc_syms.c
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*
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* Symbols exported by the sunrpc module.
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*
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* Copyright (C) 1997 Olaf Kirch <okir@monad.swb.de>
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/uio.h>
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#include <linux/unistd.h>
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#include <linux/init.h>
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#include <linux/sunrpc/sched.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/svc.h>
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#include <linux/sunrpc/svcsock.h>
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#include <linux/sunrpc/auth.h>
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#include <linux/workqueue.h>
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#include <linux/sunrpc/rpc_pipe_fs.h>
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#include <linux/sunrpc/xprtsock.h>
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extern struct cache_detail ip_map_cache, unix_gid_cache;
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extern void cleanup_rpcb_clnt(void);
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static int __init
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init_sunrpc(void)
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{
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int err = register_rpc_pipefs();
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if (err)
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goto out;
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err = rpc_init_mempool();
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if (err) {
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unregister_rpc_pipefs();
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goto out;
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}
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#ifdef RPC_DEBUG
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rpc_register_sysctl();
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#endif
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#ifdef CONFIG_PROC_FS
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rpc_proc_init();
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#endif
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cache_register(&ip_map_cache);
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cache_register(&unix_gid_cache);
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svc_init_xprt_sock(); /* svc sock transport */
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init_socket_xprt(); /* clnt sock transport */
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rpcauth_init_module();
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out:
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return err;
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}
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static void __exit
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cleanup_sunrpc(void)
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{
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cleanup_rpcb_clnt();
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rpcauth_remove_module();
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cleanup_socket_xprt();
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svc_cleanup_xprt_sock();
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unregister_rpc_pipefs();
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rpc_destroy_mempool();
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cache_unregister(&ip_map_cache);
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cache_unregister(&unix_gid_cache);
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#ifdef RPC_DEBUG
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rpc_unregister_sysctl();
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#endif
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#ifdef CONFIG_PROC_FS
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rpc_proc_exit();
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#endif
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rcu_barrier(); /* Wait for completion of call_rcu()'s */
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}
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MODULE_LICENSE("GPL");
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fs_initcall(init_sunrpc); /* Ensure we're initialised before nfs */
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module_exit(cleanup_sunrpc);
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