318 lines
9.0 KiB
C
318 lines
9.0 KiB
C
/*
|
|
* linux/include/linux/sunrpc/xprt.h
|
|
*
|
|
* Declarations for the RPC transport interface.
|
|
*
|
|
* Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
|
|
*/
|
|
|
|
#ifndef _LINUX_SUNRPC_XPRT_H
|
|
#define _LINUX_SUNRPC_XPRT_H
|
|
|
|
#include <linux/uio.h>
|
|
#include <linux/socket.h>
|
|
#include <linux/in.h>
|
|
#include <linux/sunrpc/sched.h>
|
|
#include <linux/sunrpc/xdr.h>
|
|
|
|
extern unsigned int xprt_udp_slot_table_entries;
|
|
extern unsigned int xprt_tcp_slot_table_entries;
|
|
|
|
#define RPC_MIN_SLOT_TABLE (2U)
|
|
#define RPC_DEF_SLOT_TABLE (16U)
|
|
#define RPC_MAX_SLOT_TABLE (128U)
|
|
|
|
/*
|
|
* RPC call and reply header size as number of 32bit words (verifier
|
|
* size computed separately)
|
|
*/
|
|
#define RPC_CALLHDRSIZE 6
|
|
#define RPC_REPHDRSIZE 4
|
|
|
|
/*
|
|
* Parameters for choosing a free port
|
|
*/
|
|
extern unsigned int xprt_min_resvport;
|
|
extern unsigned int xprt_max_resvport;
|
|
|
|
#define RPC_MIN_RESVPORT (1U)
|
|
#define RPC_MAX_RESVPORT (65535U)
|
|
#define RPC_DEF_MIN_RESVPORT (650U)
|
|
#define RPC_DEF_MAX_RESVPORT (1023U)
|
|
|
|
/*
|
|
* This describes a timeout strategy
|
|
*/
|
|
struct rpc_timeout {
|
|
unsigned long to_initval, /* initial timeout */
|
|
to_maxval, /* max timeout */
|
|
to_increment; /* if !exponential */
|
|
unsigned int to_retries; /* max # of retries */
|
|
unsigned char to_exponential;
|
|
};
|
|
|
|
struct rpc_task;
|
|
struct rpc_xprt;
|
|
struct seq_file;
|
|
|
|
/*
|
|
* This describes a complete RPC request
|
|
*/
|
|
struct rpc_rqst {
|
|
/*
|
|
* This is the user-visible part
|
|
*/
|
|
struct rpc_xprt * rq_xprt; /* RPC client */
|
|
struct xdr_buf rq_snd_buf; /* send buffer */
|
|
struct xdr_buf rq_rcv_buf; /* recv buffer */
|
|
|
|
/*
|
|
* This is the private part
|
|
*/
|
|
struct rpc_task * rq_task; /* RPC task data */
|
|
__u32 rq_xid; /* request XID */
|
|
int rq_cong; /* has incremented xprt->cong */
|
|
int rq_received; /* receive completed */
|
|
u32 rq_seqno; /* gss seq no. used on req. */
|
|
int rq_enc_pages_num;
|
|
struct page **rq_enc_pages; /* scratch pages for use by
|
|
gss privacy code */
|
|
void (*rq_release_snd_buf)(struct rpc_rqst *); /* release rq_enc_pages */
|
|
struct list_head rq_list;
|
|
|
|
__u32 * rq_buffer; /* XDR encode buffer */
|
|
size_t rq_bufsize;
|
|
|
|
struct xdr_buf rq_private_buf; /* The receive buffer
|
|
* used in the softirq.
|
|
*/
|
|
unsigned long rq_majortimeo; /* major timeout alarm */
|
|
unsigned long rq_timeout; /* Current timeout value */
|
|
unsigned int rq_retries; /* # of retries */
|
|
|
|
/*
|
|
* Partial send handling
|
|
*/
|
|
u32 rq_bytes_sent; /* Bytes we have sent */
|
|
|
|
unsigned long rq_xtime; /* when transmitted */
|
|
int rq_ntrans;
|
|
};
|
|
#define rq_svec rq_snd_buf.head
|
|
#define rq_slen rq_snd_buf.len
|
|
|
|
struct rpc_xprt_ops {
|
|
void (*set_buffer_size)(struct rpc_xprt *xprt, size_t sndsize, size_t rcvsize);
|
|
int (*reserve_xprt)(struct rpc_task *task);
|
|
void (*release_xprt)(struct rpc_xprt *xprt, struct rpc_task *task);
|
|
void (*set_port)(struct rpc_xprt *xprt, unsigned short port);
|
|
void (*connect)(struct rpc_task *task);
|
|
void * (*buf_alloc)(struct rpc_task *task, size_t size);
|
|
void (*buf_free)(struct rpc_task *task);
|
|
int (*send_request)(struct rpc_task *task);
|
|
void (*set_retrans_timeout)(struct rpc_task *task);
|
|
void (*timer)(struct rpc_task *task);
|
|
void (*release_request)(struct rpc_task *task);
|
|
void (*close)(struct rpc_xprt *xprt);
|
|
void (*destroy)(struct rpc_xprt *xprt);
|
|
void (*print_stats)(struct rpc_xprt *xprt, struct seq_file *seq);
|
|
};
|
|
|
|
struct rpc_xprt {
|
|
struct rpc_xprt_ops * ops; /* transport methods */
|
|
struct socket * sock; /* BSD socket layer */
|
|
struct sock * inet; /* INET layer */
|
|
|
|
struct rpc_timeout timeout; /* timeout parms */
|
|
struct sockaddr_in addr; /* server address */
|
|
int prot; /* IP protocol */
|
|
|
|
unsigned long cong; /* current congestion */
|
|
unsigned long cwnd; /* congestion window */
|
|
|
|
size_t rcvsize, /* transport rcv buffer size */
|
|
sndsize; /* transport send buffer size */
|
|
|
|
size_t max_payload; /* largest RPC payload size,
|
|
in bytes */
|
|
unsigned int tsh_size; /* size of transport specific
|
|
header */
|
|
|
|
struct rpc_wait_queue sending; /* requests waiting to send */
|
|
struct rpc_wait_queue resend; /* requests waiting to resend */
|
|
struct rpc_wait_queue pending; /* requests in flight */
|
|
struct rpc_wait_queue backlog; /* waiting for slot */
|
|
struct list_head free; /* free slots */
|
|
struct rpc_rqst * slot; /* slot table storage */
|
|
unsigned int max_reqs; /* total slots */
|
|
unsigned long state; /* transport state */
|
|
unsigned char shutdown : 1, /* being shut down */
|
|
resvport : 1; /* use a reserved port */
|
|
|
|
/*
|
|
* XID
|
|
*/
|
|
__u32 xid; /* Next XID value to use */
|
|
|
|
/*
|
|
* State of TCP reply receive stuff
|
|
*/
|
|
u32 tcp_recm, /* Fragment header */
|
|
tcp_xid, /* Current XID */
|
|
tcp_reclen, /* fragment length */
|
|
tcp_offset; /* fragment offset */
|
|
unsigned long tcp_copied, /* copied to request */
|
|
tcp_flags;
|
|
/*
|
|
* Connection of transports
|
|
*/
|
|
unsigned long connect_timeout,
|
|
bind_timeout,
|
|
reestablish_timeout;
|
|
struct work_struct connect_worker;
|
|
unsigned short port;
|
|
|
|
/*
|
|
* Disconnection of idle transports
|
|
*/
|
|
struct work_struct task_cleanup;
|
|
struct timer_list timer;
|
|
unsigned long last_used,
|
|
idle_timeout;
|
|
|
|
/*
|
|
* Send stuff
|
|
*/
|
|
spinlock_t transport_lock; /* lock transport info */
|
|
spinlock_t reserve_lock; /* lock slot table */
|
|
struct rpc_task * snd_task; /* Task blocked in send */
|
|
|
|
struct list_head recv;
|
|
|
|
struct {
|
|
unsigned long bind_count, /* total number of binds */
|
|
connect_count, /* total number of connects */
|
|
connect_start, /* connect start timestamp */
|
|
connect_time, /* jiffies waiting for connect */
|
|
sends, /* how many complete requests */
|
|
recvs, /* how many complete requests */
|
|
bad_xids; /* lookup_rqst didn't find XID */
|
|
|
|
unsigned long long req_u, /* average requests on the wire */
|
|
bklog_u; /* backlog queue utilization */
|
|
} stat;
|
|
|
|
void (*old_data_ready)(struct sock *, int);
|
|
void (*old_state_change)(struct sock *);
|
|
void (*old_write_space)(struct sock *);
|
|
};
|
|
|
|
#define XPRT_LAST_FRAG (1 << 0)
|
|
#define XPRT_COPY_RECM (1 << 1)
|
|
#define XPRT_COPY_XID (1 << 2)
|
|
#define XPRT_COPY_DATA (1 << 3)
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* Transport operations used by ULPs
|
|
*/
|
|
struct rpc_xprt * xprt_create_proto(int proto, struct sockaddr_in *addr, struct rpc_timeout *to);
|
|
void xprt_set_timeout(struct rpc_timeout *to, unsigned int retr, unsigned long incr);
|
|
|
|
/*
|
|
* Generic internal transport functions
|
|
*/
|
|
void xprt_connect(struct rpc_task *task);
|
|
void xprt_reserve(struct rpc_task *task);
|
|
int xprt_reserve_xprt(struct rpc_task *task);
|
|
int xprt_reserve_xprt_cong(struct rpc_task *task);
|
|
int xprt_prepare_transmit(struct rpc_task *task);
|
|
void xprt_transmit(struct rpc_task *task);
|
|
void xprt_abort_transmit(struct rpc_task *task);
|
|
int xprt_adjust_timeout(struct rpc_rqst *req);
|
|
void xprt_release_xprt(struct rpc_xprt *xprt, struct rpc_task *task);
|
|
void xprt_release_xprt_cong(struct rpc_xprt *xprt, struct rpc_task *task);
|
|
void xprt_release(struct rpc_task *task);
|
|
int xprt_destroy(struct rpc_xprt *xprt);
|
|
|
|
static inline u32 *xprt_skip_transport_header(struct rpc_xprt *xprt, u32 *p)
|
|
{
|
|
return p + xprt->tsh_size;
|
|
}
|
|
|
|
/*
|
|
* Transport switch helper functions
|
|
*/
|
|
void xprt_set_retrans_timeout_def(struct rpc_task *task);
|
|
void xprt_set_retrans_timeout_rtt(struct rpc_task *task);
|
|
void xprt_wake_pending_tasks(struct rpc_xprt *xprt, int status);
|
|
void xprt_wait_for_buffer_space(struct rpc_task *task);
|
|
void xprt_write_space(struct rpc_xprt *xprt);
|
|
void xprt_update_rtt(struct rpc_task *task);
|
|
void xprt_adjust_cwnd(struct rpc_task *task, int result);
|
|
struct rpc_rqst * xprt_lookup_rqst(struct rpc_xprt *xprt, u32 xid);
|
|
void xprt_complete_rqst(struct rpc_task *task, int copied);
|
|
void xprt_release_rqst_cong(struct rpc_task *task);
|
|
void xprt_disconnect(struct rpc_xprt *xprt);
|
|
|
|
/*
|
|
* Socket transport setup operations
|
|
*/
|
|
int xs_setup_udp(struct rpc_xprt *xprt, struct rpc_timeout *to);
|
|
int xs_setup_tcp(struct rpc_xprt *xprt, struct rpc_timeout *to);
|
|
|
|
/*
|
|
* Reserved bit positions in xprt->state
|
|
*/
|
|
#define XPRT_LOCKED (0)
|
|
#define XPRT_CONNECTED (1)
|
|
#define XPRT_CONNECTING (2)
|
|
#define XPRT_CLOSE_WAIT (3)
|
|
|
|
static inline void xprt_set_connected(struct rpc_xprt *xprt)
|
|
{
|
|
set_bit(XPRT_CONNECTED, &xprt->state);
|
|
}
|
|
|
|
static inline void xprt_clear_connected(struct rpc_xprt *xprt)
|
|
{
|
|
clear_bit(XPRT_CONNECTED, &xprt->state);
|
|
}
|
|
|
|
static inline int xprt_connected(struct rpc_xprt *xprt)
|
|
{
|
|
return test_bit(XPRT_CONNECTED, &xprt->state);
|
|
}
|
|
|
|
static inline int xprt_test_and_set_connected(struct rpc_xprt *xprt)
|
|
{
|
|
return test_and_set_bit(XPRT_CONNECTED, &xprt->state);
|
|
}
|
|
|
|
static inline int xprt_test_and_clear_connected(struct rpc_xprt *xprt)
|
|
{
|
|
return test_and_clear_bit(XPRT_CONNECTED, &xprt->state);
|
|
}
|
|
|
|
static inline void xprt_clear_connecting(struct rpc_xprt *xprt)
|
|
{
|
|
smp_mb__before_clear_bit();
|
|
clear_bit(XPRT_CONNECTING, &xprt->state);
|
|
smp_mb__after_clear_bit();
|
|
}
|
|
|
|
static inline int xprt_connecting(struct rpc_xprt *xprt)
|
|
{
|
|
return test_bit(XPRT_CONNECTING, &xprt->state);
|
|
}
|
|
|
|
static inline int xprt_test_and_set_connecting(struct rpc_xprt *xprt)
|
|
{
|
|
return test_and_set_bit(XPRT_CONNECTING, &xprt->state);
|
|
}
|
|
|
|
#endif /* __KERNEL__*/
|
|
|
|
#endif /* _LINUX_SUNRPC_XPRT_H */
|