Add start of client, start of real protocol
Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/server.h b/server.h
index aed61b2..51a8417 100644
--- a/server.h
+++ b/server.h
@@ -1,7 +1,71 @@
#ifndef FIO_SERVER_H
#define FIO_SERVER_H
+#include <inttypes.h>
+#include <endian.h>
+
+/*
+ * On-wire encoding is little endian
+ */
+struct fio_net_cmd {
+ uint16_t version; /* protocol version */
+ uint16_t opcode; /* command opcode */
+ uint32_t flags; /* modifier flags */
+ uint64_t serial; /* serial number */
+ uint32_t pad;
+ uint32_t pdu_len; /* length of post-cmd layload */
+ uint32_t cmd_crc32; /* cmd checksum */
+ uint32_t pdu_crc32; /* payload checksum */
+ uint8_t payload[0]; /* payload */
+};
+
+enum {
+ FIO_SERVER_VER = 1,
+ FIO_SERVER_VER1 = 1,
+
+ FIO_SERVER_MAX_PDU = 4096,
+
+ FIO_NET_CMD_QUIT = 1,
+ FIO_NET_CMD_JOB = 2,
+ FIO_NET_CMD_JOB_END = 3,
+ FIO_NET_CMD_ACK = 4,
+ FIO_NET_CMD_NAK = 5,
+};
+
extern int fio_server(void);
+
+extern int fio_client_connect(const char *);
+extern int fio_client_send_ini(const char *);
+
+extern int fio_recv_data(int sk, void *p, unsigned int len);
+extern int fio_send_data(int sk, const void *p, unsigned int len);
+extern void fio_net_cmd_crc(struct fio_net_cmd *);
+
extern int exit_backend;
+extern int fio_net_port;
+
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+#define le16_to_cpu(x) (x)
+#define le32_to_cpu(x) (x)
+#define le64_to_cpu(x) (x)
+#define cpu_to_le16(x) (x)
+#define cpu_to_le32(x) (x)
+#define cpu_to_le64(x) (x)
+#elif __BYTE_ORDER == __BIG_ENDIAN
+#define le16_to_cpu(x) __bswap_16(x)
+#define le32_to_cpu(x) __bswap_32(x)
+#define le64_to_cpu(x) __bswap_64(x)
+#define cpu_to_le16(x) __bswap_16(x)
+#define cpu_to_le32(x) __bswap_32(x)
+#define cpu_to_le64(x) __bswap_64(x)
+#else
+#error "Endianness not detected"
+#endif
+
+static inline void fio_init_net_cmd(struct fio_net_cmd *cmd)
+{
+ memset(cmd, 0, sizeof(*cmd));
+ cmd->version = cpu_to_le16(FIO_SERVER_VER1);
+}
#endif