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addr.h	4.94 KB	0644	Edit Rename Delete
auth.h	5.96 KB	0644	Edit Rename Delete
auth_gss.h	2.31 KB	0644	Edit Rename Delete
bc_xprt.h	2.78 KB	0644	Edit Rename Delete
cache.h	8.94 KB	0644	Edit Rename Delete
clnt.h	8.38 KB	0644	Edit Rename Delete
debug.h	2.76 KB	0644	Edit Rename Delete
gss_api.h	4.45 KB	0644	Edit Rename Delete
gss_asn1.h	3.11 KB	0644	Edit Rename Delete
gss_err.h	5.88 KB	0644	Edit Rename Delete
gss_krb5.h	10.87 KB	0644	Edit Rename Delete
gss_krb5_enctypes.h	1.13 KB	0644	Edit Rename Delete
metrics.h	3.68 KB	0644	Edit Rename Delete
msg_prot.h	6.08 KB	0644	Edit Rename Delete
rpc_pipe_fs.h	3.85 KB	0644	Edit Rename Delete
rpc_rdma.h	6.07 KB	0644	Edit Rename Delete
rpc_rdma_cid.h	622 B	0644	Edit Rename Delete
sched.h	9.96 KB	0644	Edit Rename Delete
stats.h	2 KB	0644	Edit Rename Delete
svc.h	18.58 KB	0644	Edit Rename Delete
svc_rdma.h	7.62 KB	0644	Edit Rename Delete
svc_rdma_pcl.h	3.13 KB	0644	Edit Rename Delete
svc_xprt.h	7.12 KB	0644	Edit Rename Delete
svcauth.h	6.15 KB	0644	Edit Rename Delete
svcauth_gss.h	782 B	0644	Edit Rename Delete
svcsock.h	2.14 KB	0644	Edit Rename Delete
timer.h	1.14 KB	0644	Edit Rename Delete
types.h	497 B	0644	Edit Rename Delete
xdr.h	20.99 KB	0644	Edit Rename Delete
xprt.h	15.74 KB	0644	Edit Rename Delete
xprtmultipath.h	2.24 KB	0644	Edit Rename Delete
xprtrdma.h	2.95 KB	0644	Edit Rename Delete
xprtsock.h	1.8 KB	0644	Edit Rename Delete

Edit File:svc_xprt.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * linux/include/linux/sunrpc/svc_xprt.h
 *
 * RPC server transport I/O
 */

#ifndef SUNRPC_SVC_XPRT_H
#define SUNRPC_SVC_XPRT_H

#include <linux/sunrpc/svc.h>

struct module;

struct svc_xprt_ops {
	struct svc_xprt	*(*xpo_create)(struct svc_serv *,
				       struct net *net,
				       struct sockaddr *, int,
				       int);
	struct svc_xprt	*(*xpo_accept)(struct svc_xprt *);
	int		(*xpo_has_wspace)(struct svc_xprt *);
	int		(*xpo_recvfrom)(struct svc_rqst *);
	int		(*xpo_sendto)(struct svc_rqst *);
	int		(*xpo_result_payload)(struct svc_rqst *, unsigned int,
					      unsigned int);
	void		(*xpo_release_ctxt)(struct svc_xprt *xprt, void *ctxt);
	void		(*xpo_detach)(struct svc_xprt *);
	void		(*xpo_free)(struct svc_xprt *);
	void		(*xpo_secure_port)(struct svc_rqst *rqstp);
	void		(*xpo_kill_temp_xprt)(struct svc_xprt *);
};

struct svc_xprt_class {
	const char		*xcl_name;
	struct module		*xcl_owner;
	const struct svc_xprt_ops *xcl_ops;
	struct list_head	xcl_list;
	u32			xcl_max_payload;
	int			xcl_ident;
};

/*
 * This is embedded in an object that wants a callback before deleting
 * an xprt; intended for use by NFSv4.1, which needs to know when a
 * client's tcp connection (and hence possibly a backchannel) goes away.
 */
struct svc_xpt_user {
	struct list_head list;
	void (*callback)(struct svc_xpt_user *);
};

struct svc_xprt {
	struct svc_xprt_class	*xpt_class;
	const struct svc_xprt_ops *xpt_ops;
	struct kref		xpt_ref;
	struct list_head	xpt_list;
	struct list_head	xpt_ready;
	unsigned long		xpt_flags;
#define	XPT_BUSY	0		/* enqueued/receiving */
#define	XPT_CONN	1		/* conn pending */
#define	XPT_CLOSE	2		/* dead or dying */
#define	XPT_DATA	3		/* data pending */
#define	XPT_TEMP	4		/* connected transport */
#define	XPT_DEAD	6		/* transport closed */
#define	XPT_CHNGBUF	7		/* need to change snd/rcv buf sizes */
#define	XPT_DEFERRED	8		/* deferred request pending */
#define	XPT_OLD		9		/* used for xprt aging mark+sweep */
#define XPT_LISTENER	10		/* listening endpoint */
#define XPT_CACHE_AUTH	11		/* cache auth info */
#define XPT_LOCAL	12		/* connection from loopback interface */
#define XPT_KILL_TEMP   13		/* call xpo_kill_temp_xprt before closing */
#define XPT_CONG_CTRL	14		/* has congestion control */

struct svc_serv		*xpt_server;	/* service for transport */
	atomic_t    	    	xpt_reserved;	/* space on outq that is rsvd */
	atomic_t		xpt_nr_rqsts;	/* Number of requests */
	struct mutex		xpt_mutex;	/* to serialize sending data */
	spinlock_t		xpt_lock;	/* protects sk_deferred
						 * and xpt_auth_cache */
	void			*xpt_auth_cache;/* auth cache */
	struct list_head	xpt_deferred;	/* deferred requests that need
						 * to be revisted */
	struct sockaddr_storage	xpt_local;	/* local address */
	size_t			xpt_locallen;	/* length of address */
	struct sockaddr_storage	xpt_remote;	/* remote peer's address */
	size_t			xpt_remotelen;	/* length of address */
	char			xpt_remotebuf[INET6_ADDRSTRLEN + 10];
	struct list_head	xpt_users;	/* callbacks on free */

struct net		*xpt_net;
	const struct cred	*xpt_cred;
	struct rpc_xprt		*xpt_bc_xprt;	/* NFSv4.1 backchannel */
	struct rpc_xprt_switch	*xpt_bc_xps;	/* NFSv4.1 backchannel */
};

static inline void unregister_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
{
	spin_lock(&xpt->xpt_lock);
	list_del_init(&u->list);
	spin_unlock(&xpt->xpt_lock);
}

static inline int register_xpt_user(struct svc_xprt *xpt, struct svc_xpt_user *u)
{
	spin_lock(&xpt->xpt_lock);
	if (test_bit(XPT_CLOSE, &xpt->xpt_flags)) {
		/*
		 * The connection is about to be deleted soon (or,
		 * worse, may already be deleted--in which case we've
		 * already notified the xpt_users).
		 */
		spin_unlock(&xpt->xpt_lock);
		return -ENOTCONN;
	}
	list_add(&u->list, &xpt->xpt_users);
	spin_unlock(&xpt->xpt_lock);
	return 0;
}

static inline bool svc_xprt_is_dead(const struct svc_xprt *xprt)
{
	return (test_bit(XPT_DEAD, &xprt->xpt_flags) != 0) ||
		(test_bit(XPT_CLOSE, &xprt->xpt_flags) != 0);
}

int	svc_reg_xprt_class(struct svc_xprt_class *);
void	svc_unreg_xprt_class(struct svc_xprt_class *);
void	svc_xprt_init(struct net *, struct svc_xprt_class *, struct svc_xprt *,
		      struct svc_serv *);
int	svc_xprt_create(struct svc_serv *serv, const char *xprt_name,
			struct net *net, const int family,
			const unsigned short port, int flags,
			const struct cred *cred);
void	svc_xprt_destroy_all(struct svc_serv *serv, struct net *net);
void	svc_xprt_received(struct svc_xprt *xprt);
void	svc_xprt_enqueue(struct svc_xprt *xprt);
void	svc_xprt_put(struct svc_xprt *xprt);
void	svc_xprt_copy_addrs(struct svc_rqst *rqstp, struct svc_xprt *xprt);
void	svc_xprt_close(struct svc_xprt *xprt);
int	svc_port_is_privileged(struct sockaddr *sin);
int	svc_print_xprts(char *buf, int maxlen);
struct	svc_xprt *svc_find_xprt(struct svc_serv *serv, const char *xcl_name,
			struct net *net, const sa_family_t af,
			const unsigned short port);
int	svc_xprt_names(struct svc_serv *serv, char *buf, const int buflen);
void	svc_add_new_perm_xprt(struct svc_serv *serv, struct svc_xprt *xprt);
void	svc_age_temp_xprts_now(struct svc_serv *, struct sockaddr *);
void	svc_xprt_deferred_close(struct svc_xprt *xprt);

static inline void svc_xprt_get(struct svc_xprt *xprt)
{
	kref_get(&xprt->xpt_ref);
}
static inline void svc_xprt_set_local(struct svc_xprt *xprt,
				      const struct sockaddr *sa,
				      const size_t salen)
{
	memcpy(&xprt->xpt_local, sa, salen);
	xprt->xpt_locallen = salen;
}
static inline void svc_xprt_set_remote(struct svc_xprt *xprt,
				       const struct sockaddr *sa,
				       const size_t salen)
{
	memcpy(&xprt->xpt_remote, sa, salen);
	xprt->xpt_remotelen = salen;
	snprintf(xprt->xpt_remotebuf, sizeof(xprt->xpt_remotebuf) - 1,
		 "%pISpc", sa);
}

static inline unsigned short svc_addr_port(const struct sockaddr *sa)
{
	const struct sockaddr_in *sin = (const struct sockaddr_in *)sa;
	const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)sa;

switch (sa->sa_family) {
	case AF_INET:
		return ntohs(sin->sin_port);
	case AF_INET6:
		return ntohs(sin6->sin6_port);
	}

return 0;
}

static inline size_t svc_addr_len(const struct sockaddr *sa)
{
	switch (sa->sa_family) {
	case AF_INET:
		return sizeof(struct sockaddr_in);
	case AF_INET6:
		return sizeof(struct sockaddr_in6);
	}
	BUG();
}

static inline unsigned short svc_xprt_local_port(const struct svc_xprt *xprt)
{
	return svc_addr_port((const struct sockaddr *)&xprt->xpt_local);
}

static inline unsigned short svc_xprt_remote_port(const struct svc_xprt *xprt)
{
	return svc_addr_port((const struct sockaddr *)&xprt->xpt_remote);
}

static inline char *__svc_print_addr(const struct sockaddr *addr,
				     char *buf, const size_t len)
{
	const struct sockaddr_in *sin = (const struct sockaddr_in *)addr;
	const struct sockaddr_in6 *sin6 = (const struct sockaddr_in6 *)addr;

switch (addr->sa_family) {
	case AF_INET:
		snprintf(buf, len, "%pI4, port=%u", &sin->sin_addr,
			ntohs(sin->sin_port));
		break;

case AF_INET6:
		snprintf(buf, len, "%pI6, port=%u",
			 &sin6->sin6_addr,
			ntohs(sin6->sin6_port));
		break;

default:
		snprintf(buf, len, "unknown address type: %d", addr->sa_family);
		break;
	}

return buf;
}
#endif /* SUNRPC_SVC_XPRT_H */

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Edit File:svc_xprt.h