#include <linux/uio.h>
#include <linux/socket.h>
#include <linux/in.h>
+#include <linux/kref.h>
#include <linux/sunrpc/sched.h>
#include <linux/sunrpc/xdr.h>
+#include <linux/sunrpc/msg_prot.h>
-extern unsigned int xprt_udp_slot_table_entries;
-extern unsigned int xprt_tcp_slot_table_entries;
+#ifdef __KERNEL__
#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 char to_exponential;
};
+enum rpc_display_format_t {
+ RPC_DISPLAY_ADDR = 0,
+ RPC_DISPLAY_PORT,
+ RPC_DISPLAY_PROTO,
+ RPC_DISPLAY_HEX_ADDR,
+ RPC_DISPLAY_HEX_PORT,
+ RPC_DISPLAY_NETID,
+ RPC_DISPLAY_MAX,
+};
+
struct rpc_task;
struct rpc_xprt;
+struct seq_file;
/*
* This describes a complete RPC request
* This is the private part
*/
struct rpc_task * rq_task; /* RPC task data */
- __u32 rq_xid; /* request XID */
+ __be32 rq_xid; /* request XID */
int rq_cong; /* has incremented xprt->cong */
- int rq_received; /* receive completed */
+ int rq_reply_bytes_recvd; /* number of reply */
+ /* bytes received */
u32 rq_seqno; /* gss seq no. used on req. */
int rq_enc_pages_num;
struct page **rq_enc_pages; /* scratch pages for use by
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_callsize,
+ rq_rcvsize;
+
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 */
- /*
- * For authentication (e.g. auth_des)
- */
- u32 rq_creddata[2];
+ unsigned int rq_connect_cookie;
+ /* A cookie used to track the
+ state of the transport
+ connection */
/*
* Partial send handling
*/
-
u32 rq_bytes_sent; /* Bytes we have sent */
unsigned long rq_xtime; /* when transmitted */
int rq_ntrans;
+
+#if defined(CONFIG_NFS_V4_1)
+ struct list_head rq_bc_list; /* Callback service list */
+ unsigned long rq_bc_pa_state; /* Backchannel prealloc state */
+ struct list_head rq_bc_pa_list; /* Backchannel prealloc list */
+#endif /* CONFIG_NFS_V4_1 */
};
#define rq_svec rq_snd_buf.head
#define rq_slen rq_snd_buf.len
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 (*rpcbind)(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)(void *buffer);
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);
+};
+
+/*
+ * RPC transport identifiers
+ *
+ * To preserve compatibility with the historical use of raw IP protocol
+ * id's for transport selection, UDP and TCP identifiers are specified
+ * with the previous values. No such restriction exists for new transports,
+ * except that they may not collide with these values (17 and 6,
+ * respectively).
+ */
+#define XPRT_TRANSPORT_BC (1 << 31)
+enum xprt_transports {
+ XPRT_TRANSPORT_UDP = IPPROTO_UDP,
+ XPRT_TRANSPORT_TCP = IPPROTO_TCP,
+ XPRT_TRANSPORT_BC_TCP = IPPROTO_TCP | XPRT_TRANSPORT_BC,
+ XPRT_TRANSPORT_RDMA = 256
};
struct rpc_xprt {
+ struct kref kref; /* Reference count */
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 */
+ const struct rpc_timeout *timeout; /* timeout parms */
+ struct sockaddr_storage addr; /* server address */
+ size_t addrlen; /* size of 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 binding; /* requests waiting on rpcbind */
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 */
unsigned long state; /* transport state */
unsigned char shutdown : 1, /* being shut down */
resvport : 1; /* use a reserved port */
+ unsigned int bind_index; /* bind function index */
/*
- * 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,
+ unsigned long bind_timeout,
reestablish_timeout;
- struct work_struct connect_worker;
- unsigned short port;
+ unsigned int connect_cookie; /* A cookie that gets bumped
+ every time the transport
+ is reconnected */
/*
* Disconnection of idle transports
*/
spinlock_t transport_lock; /* lock transport info */
spinlock_t reserve_lock; /* lock slot table */
+ u32 xid; /* Next XID value to use */
struct rpc_task * snd_task; /* Task blocked in send */
-
+ struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
+#if defined(CONFIG_NFS_V4_1)
+ struct svc_serv *bc_serv; /* The RPC service which will */
+ /* process the callback */
+ unsigned int bc_alloc_count; /* Total number of preallocs */
+ spinlock_t bc_pa_lock; /* Protects the preallocated
+ * items */
+ struct list_head bc_pa_list; /* List of preallocated
+ * backchannel rpc_rqst's */
+#endif /* CONFIG_NFS_V4_1 */
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 */
- 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)
+ unsigned long long req_u, /* average requests on the wire */
+ bklog_u; /* backlog queue utilization */
+ } stat;
-#ifdef __KERNEL__
+ const char *address_strings[RPC_DISPLAY_MAX];
+};
+#if defined(CONFIG_NFS_V4_1)
/*
- * Transport operations used by ULPs
+ * Backchannel flags
*/
-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);
+#define RPC_BC_PA_IN_USE 0x0001 /* Preallocated backchannel */
+ /* buffer in use */
+#endif /* CONFIG_NFS_V4_1 */
+
+#if defined(CONFIG_NFS_V4_1)
+static inline int bc_prealloc(struct rpc_rqst *req)
+{
+ return test_bit(RPC_BC_PA_IN_USE, &req->rq_bc_pa_state);
+}
+#else
+static inline int bc_prealloc(struct rpc_rqst *req)
+{
+ return 0;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
+struct xprt_create {
+ int ident; /* XPRT_TRANSPORT identifier */
+ struct sockaddr * srcaddr; /* optional local address */
+ struct sockaddr * dstaddr; /* remote peer address */
+ size_t addrlen;
+ struct svc_xprt *bc_xprt; /* NFSv4.1 backchannel */
+};
+
+struct xprt_class {
+ struct list_head list;
+ int ident; /* XPRT_TRANSPORT identifier */
+ struct rpc_xprt * (*setup)(struct xprt_create *);
+ struct module *owner;
+ char name[32];
+};
/*
* Generic internal transport functions
*/
+struct rpc_xprt *xprt_create_transport(struct xprt_create *args);
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);
+void xprt_end_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);
+struct rpc_xprt * xprt_get(struct rpc_xprt *xprt);
+void xprt_put(struct rpc_xprt *xprt);
-static inline u32 *xprt_skip_transport_header(struct rpc_xprt *xprt, u32 *p)
+static inline __be32 *xprt_skip_transport_header(struct rpc_xprt *xprt, __be32 *p)
{
return p + xprt->tsh_size;
}
/*
* Transport switch helper functions
*/
+int xprt_register_transport(struct xprt_class *type);
+int xprt_unregister_transport(struct xprt_class *type);
+int xprt_load_transport(const char *);
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_wait_for_buffer_space(struct rpc_task *task, rpc_action action);
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);
+struct rpc_rqst * xprt_lookup_rqst(struct rpc_xprt *xprt, __be32 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);
+void xprt_disconnect_done(struct rpc_xprt *xprt);
+void xprt_force_disconnect(struct rpc_xprt *xprt);
+void xprt_conditional_disconnect(struct rpc_xprt *xprt, unsigned int cookie);
/*
* Reserved bit positions in xprt->state
#define XPRT_LOCKED (0)
#define XPRT_CONNECTED (1)
#define XPRT_CONNECTING (2)
+#define XPRT_CLOSE_WAIT (3)
+#define XPRT_BOUND (4)
+#define XPRT_BINDING (5)
+#define XPRT_CLOSING (6)
+#define XPRT_CONNECTION_ABORT (7)
+#define XPRT_CONNECTION_CLOSE (8)
static inline void xprt_set_connected(struct rpc_xprt *xprt)
{
return test_and_set_bit(XPRT_CONNECTING, &xprt->state);
}
+static inline void xprt_set_bound(struct rpc_xprt *xprt)
+{
+ test_and_set_bit(XPRT_BOUND, &xprt->state);
+}
+
+static inline int xprt_bound(struct rpc_xprt *xprt)
+{
+ return test_bit(XPRT_BOUND, &xprt->state);
+}
+
+static inline void xprt_clear_bound(struct rpc_xprt *xprt)
+{
+ clear_bit(XPRT_BOUND, &xprt->state);
+}
+
+static inline void xprt_clear_binding(struct rpc_xprt *xprt)
+{
+ smp_mb__before_clear_bit();
+ clear_bit(XPRT_BINDING, &xprt->state);
+ smp_mb__after_clear_bit();
+}
+
+static inline int xprt_test_and_set_binding(struct rpc_xprt *xprt)
+{
+ return test_and_set_bit(XPRT_BINDING, &xprt->state);
+}
+
#endif /* __KERNEL__*/
#endif /* _LINUX_SUNRPC_XPRT_H */
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