Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 232 insertions, 0 deletions

diff --git a/include/linux/sunrpc/xprt.h b/include/linux/sunrpc/xprt.h
new file mode 100644
index 000000000000..e618c1649814
--- /dev/null
+++ b/include/linux/sunrpc/xprt.h
@@ -0,0 +1,232 @@
+/*
+ *  linux/include/linux/sunrpc/clnt_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>
+
+/*
+ * The transport code maintains an estimate on the maximum number of out-
+ * standing RPC requests, using a smoothed version of the congestion
+ * avoidance implemented in 44BSD. This is basically the Van Jacobson
+ * congestion algorithm: If a retransmit occurs, the congestion window is
+ * halved; otherwise, it is incremented by 1/cwnd when
+ *
+ *      -       a reply is received and
+ *      -       a full number of requests are outstanding and
+ *      -       the congestion window hasn't been updated recently.
+ *
+ * Upper procedures may check whether a request would block waiting for
+ * a free RPC slot by using the RPC_CONGESTED() macro.
+ */
+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)
+
+#define RPC_CWNDSHIFT           (8U)
+#define RPC_CWNDSCALE           (1U << RPC_CWNDSHIFT)
+#define RPC_INITCWND            RPC_CWNDSCALE
+#define RPC_MAXCWND(xprt)       ((xprt)->max_reqs << RPC_CWNDSHIFT)
+#define RPCXPRT_CONGESTED(xprt) ((xprt)->cong >= (xprt)->cwnd)
+
+/* Default timeout values */
+#define RPC_MAX_UDP_TIMEOUT     (60*HZ)
+#define RPC_MAX_TCP_TIMEOUT     (600*HZ)
+
+/*
+ * Wait duration for an RPC TCP connection to be established.  Solaris
+ * NFS over TCP uses 60 seconds, for example, which is in line with how
+ * long a server takes to reboot.
+ */
+#define RPC_CONNECT_TIMEOUT     (60*HZ)
+
+/*
+ * Delay an arbitrary number of seconds before attempting to reconnect
+ * after an error.
+ */
+#define RPC_REESTABLISH_TIMEOUT (15*HZ)
+
+/* RPC call and reply header size as number of 32bit words (verifier
+ * size computed separately)
+ */
+#define RPC_CALLHDRSIZE         6
+#define RPC_REPHDRSIZE          4
+
+/*
+ * 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;
+};
+
+/*
+ * 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. */
+
+        struct list_head        rq_list;
+
+        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];
+        
+        /*
+         * 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
+
+#define XPRT_LAST_FRAG          (1 << 0)
+#define XPRT_COPY_RECM          (1 << 1)
+#define XPRT_COPY_XID           (1 << 2)
+#define XPRT_COPY_DATA          (1 << 3)
+
+struct rpc_xprt {
+        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 */
+
+        unsigned int            rcvsize,        /* socket receive buffer size */
+                                sndsize;        /* socket send buffer size */
+
+        size_t                  max_payload;    /* largest RPC payload size,
+                                                   in bytes */
+
+        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           sockstate;      /* Socket state */
+        unsigned char           shutdown   : 1, /* being shut down */
+                                nocong     : 1, /* no congestion control */
+                                resvport   : 1, /* use a reserved port */
+                                stream     : 1; /* TCP */
+
+        /*
+         * 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 sockets
+         */
+        struct work_struct      sock_connect;
+        unsigned short          port;
+        /*
+         * Disconnection of idle sockets
+         */
+        struct work_struct      task_cleanup;
+        struct timer_list       timer;
+        unsigned long           last_used;
+
+        /*
+         * Send stuff
+         */
+        spinlock_t              sock_lock;      /* lock socket info */
+        spinlock_t              xprt_lock;      /* lock xprt info */
+        struct rpc_task *       snd_task;       /* Task blocked in send */
+
+        struct list_head        recv;
+
+
+        void                    (*old_data_ready)(struct sock *, int);
+        void                    (*old_state_change)(struct sock *);
+        void                    (*old_write_space)(struct sock *);
+
+        wait_queue_head_t       cong_wait;
+};
+
+#ifdef __KERNEL__
+
+struct rpc_xprt *       xprt_create_proto(int proto, struct sockaddr_in *addr,
+                                        struct rpc_timeout *toparms);
+int                     xprt_destroy(struct rpc_xprt *);
+void                    xprt_set_timeout(struct rpc_timeout *, unsigned int,
+                                        unsigned long);
+
+void                    xprt_reserve(struct rpc_task *);
+int                     xprt_prepare_transmit(struct rpc_task *);
+void                    xprt_transmit(struct rpc_task *);
+void                    xprt_receive(struct rpc_task *);
+int                     xprt_adjust_timeout(struct rpc_rqst *req);
+void                    xprt_release(struct rpc_task *);
+void                    xprt_connect(struct rpc_task *);
+void                    xprt_sock_setbufsize(struct rpc_xprt *);
+
+#define XPRT_LOCKED     0
+#define XPRT_CONNECT    1
+#define XPRT_CONNECTING 2
+
+#define xprt_connected(xp)              (test_bit(XPRT_CONNECT, &(xp)->sockstate))
+#define xprt_set_connected(xp)          (set_bit(XPRT_CONNECT, &(xp)->sockstate))
+#define xprt_test_and_set_connected(xp) (test_and_set_bit(XPRT_CONNECT, &(xp)->sockstate))
+#define xprt_test_and_clear_connected(xp) \
+                                        (test_and_clear_bit(XPRT_CONNECT, &(xp)->sockstate))
+#define xprt_clear_connected(xp)        (clear_bit(XPRT_CONNECT, &(xp)->sockstate))
+
+#endif /* __KERNEL__*/
+
+#endif /* _LINUX_SUNRPC_XPRT_H */