nfs41: sunrpc: provide functions to create and destroy a svc_xprt for backchannel use
For nfs41 callbacks we need an svc_xprt to process requests coming up the backchannel socket as rpc_rqst's that are transformed into svc_rqst's that need a rq_xprt to be processed. The svc_{udp,tcp}_create methods are too heavy for this job as svc_create_socket creates an actual socket to listen on while for nfs41 we're "reusing" the fore channel's socket. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
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a43cde94fe
Коммит
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@ -42,6 +42,8 @@ int svc_sock_names(char *buf, struct svc_serv *serv, char *toclose);
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int svc_addsock(struct svc_serv *serv, int fd, char *name_return);
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void svc_init_xprt_sock(void);
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void svc_cleanup_xprt_sock(void);
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struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot);
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void svc_sock_destroy(struct svc_xprt *);
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/*
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* svc_makesock socket characteristics
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@ -1327,3 +1327,42 @@ static void svc_sock_free(struct svc_xprt *xprt)
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sock_release(svsk->sk_sock);
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kfree(svsk);
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}
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/*
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* Create a svc_xprt.
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*
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* For internal use only (e.g. nfsv4.1 backchannel).
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* Callers should typically use the xpo_create() method.
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*/
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struct svc_xprt *svc_sock_create(struct svc_serv *serv, int prot)
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{
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struct svc_sock *svsk;
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struct svc_xprt *xprt = NULL;
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dprintk("svc: %s\n", __func__);
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svsk = kzalloc(sizeof(*svsk), GFP_KERNEL);
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if (!svsk)
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goto out;
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xprt = &svsk->sk_xprt;
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if (prot == IPPROTO_TCP)
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svc_xprt_init(&svc_tcp_class, xprt, serv);
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else if (prot == IPPROTO_UDP)
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svc_xprt_init(&svc_udp_class, xprt, serv);
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else
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BUG();
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out:
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dprintk("svc: %s return %p\n", __func__, xprt);
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return xprt;
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}
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EXPORT_SYMBOL_GPL(svc_sock_create);
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/*
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* Destroy a svc_sock.
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*/
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void svc_sock_destroy(struct svc_xprt *xprt)
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{
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if (xprt)
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kfree(container_of(xprt, struct svc_sock, sk_xprt));
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}
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EXPORT_SYMBOL_GPL(svc_sock_destroy);
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