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, 127 insertions, 0 deletions

diff --git a/include/rxrpc/packet.h b/include/rxrpc/packet.h
new file mode 100644
index 000000000000..1447f0aaa0eb
--- /dev/null
+++ b/include/rxrpc/packet.h
@@ -0,0 +1,127 @@
+/* packet.h: Rx packet layout and definitions
+ *
+ * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#ifndef _LINUX_RXRPC_PACKET_H
+#define _LINUX_RXRPC_PACKET_H
+
+#include <rxrpc/types.h>
+
+#define RXRPC_IPUDP_SIZE                28
+extern size_t RXRPC_MAX_PACKET_SIZE;
+#define RXRPC_MAX_PACKET_DATA_SIZE      (RXRPC_MAX_PACKET_SIZE - sizeof(struct rxrpc_header))
+#define RXRPC_LOCAL_PACKET_SIZE         RXRPC_MAX_PACKET_SIZE
+#define RXRPC_REMOTE_PACKET_SIZE        (576 - RXRPC_IPUDP_SIZE)
+
+/*****************************************************************************/
+/*
+ * on-the-wire Rx packet header
+ * - all multibyte fields should be in network byte order
+ */
+struct rxrpc_header
+{
+        __be32          epoch;          /* client boot timestamp */
+
+        __be32          cid;            /* connection and channel ID */
+#define RXRPC_MAXCALLS          4                       /* max active calls per conn */
+#define RXRPC_CHANNELMASK       (RXRPC_MAXCALLS-1)      /* mask for channel ID */
+#define RXRPC_CIDMASK           (~RXRPC_CHANNELMASK)    /* mask for connection ID */
+#define RXRPC_CIDSHIFT          2                       /* shift for connection ID */
+
+        __be32          callNumber;     /* call ID (0 for connection-level packets) */
+#define RXRPC_PROCESS_MAXCALLS  (1<<2)  /* maximum number of active calls per conn (power of 2) */
+
+        __be32          seq;            /* sequence number of pkt in call stream */
+        __be32          serial;         /* serial number of pkt sent to network */
+
+        uint8_t         type;           /* packet type */
+#define RXRPC_PACKET_TYPE_DATA          1       /* data */
+#define RXRPC_PACKET_TYPE_ACK           2       /* ACK */
+#define RXRPC_PACKET_TYPE_BUSY          3       /* call reject */
+#define RXRPC_PACKET_TYPE_ABORT         4       /* call/connection abort */
+#define RXRPC_PACKET_TYPE_ACKALL        5       /* ACK all outstanding packets on call */
+#define RXRPC_PACKET_TYPE_CHALLENGE     6       /* connection security challenge (SRVR->CLNT) */
+#define RXRPC_PACKET_TYPE_RESPONSE      7       /* connection secutity response (CLNT->SRVR) */
+#define RXRPC_PACKET_TYPE_DEBUG         8       /* debug info request */
+#define RXRPC_N_PACKET_TYPES            9       /* number of packet types (incl type 0) */
+
+        uint8_t         flags;          /* packet flags */
+#define RXRPC_CLIENT_INITIATED  0x01            /* signifies a packet generated by a client */
+#define RXRPC_REQUEST_ACK       0x02            /* request an unconditional ACK of this packet */
+#define RXRPC_LAST_PACKET       0x04            /* the last packet from this side for this call */
+#define RXRPC_MORE_PACKETS      0x08            /* more packets to come */
+#define RXRPC_JUMBO_PACKET      0x20            /* [DATA] this is a jumbo packet */
+#define RXRPC_SLOW_START_OK     0x20            /* [ACK] slow start supported */
+
+        uint8_t         userStatus;     /* app-layer defined status */
+        uint8_t         securityIndex;  /* security protocol ID */
+        __be16          _rsvd;          /* reserved (used by kerberos security as cksum) */
+        __be16          serviceId;      /* service ID */
+
+} __attribute__((packed));
+
+#define __rxrpc_header_off(X) offsetof(struct rxrpc_header,X)
+
+extern const char *rxrpc_pkts[];
+
+/*****************************************************************************/
+/*
+ * jumbo packet secondary header
+ * - can be mapped to read header by:
+ *   - new_serial = serial + 1
+ *   - new_seq = seq + 1
+ *   - new_flags = j_flags
+ *   - new__rsvd = j__rsvd
+ *   - duplicating all other fields
+ */
+struct rxrpc_jumbo_header
+{
+        uint8_t         flags;          /* packet flags (as per rxrpc_header) */
+        uint8_t         pad;
+        __be16          _rsvd;          /* reserved (used by kerberos security as cksum) */
+};
+
+#define RXRPC_JUMBO_DATALEN     1412    /* non-terminal jumbo packet data length */
+
+/*****************************************************************************/
+/*
+ * on-the-wire Rx ACK packet data payload
+ * - all multibyte fields should be in network byte order
+ */
+struct rxrpc_ackpacket
+{
+        __be16          bufferSpace;    /* number of packet buffers available */
+        __be16          maxSkew;        /* diff between serno being ACK'd and highest serial no
+                                         * received */
+        __be32          firstPacket;    /* sequence no of first ACK'd packet in attached list */
+        __be32          previousPacket; /* sequence no of previous packet received */
+        __be32          serial;         /* serial no of packet that prompted this ACK */
+
+        uint8_t         reason;         /* reason for ACK */
+#define RXRPC_ACK_REQUESTED             1       /* ACK was requested on packet */
+#define RXRPC_ACK_DUPLICATE             2       /* duplicate packet received */
+#define RXRPC_ACK_OUT_OF_SEQUENCE       3       /* out of sequence packet received */
+#define RXRPC_ACK_EXCEEDS_WINDOW        4       /* packet received beyond end of ACK window */
+#define RXRPC_ACK_NOSPACE               5       /* packet discarded due to lack of buffer space */
+#define RXRPC_ACK_PING                  6       /* keep alive ACK */
+#define RXRPC_ACK_PING_RESPONSE         7       /* response to RXRPC_ACK_PING */
+#define RXRPC_ACK_DELAY                 8       /* nothing happened since received packet */
+#define RXRPC_ACK_IDLE                  9       /* ACK due to fully received ACK window */
+
+        uint8_t         nAcks;          /* number of ACKs */
+#define RXRPC_MAXACKS   255
+
+        uint8_t         acks[0];        /* list of ACK/NAKs */
+#define RXRPC_ACK_TYPE_NACK             0
+#define RXRPC_ACK_TYPE_ACK              1
+
+} __attribute__((packed));
+
+#endif /* _LINUX_RXRPC_PACKET_H */