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/*-
* Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef _GGATE_H_
#define _GGATE_H_
#include <sys/endian.h>
#include <stdarg.h>
#define G_GATE_PORT 3080
#define G_GATE_RCVBUF 131072
#define G_GATE_SNDBUF 131072
#define G_GATE_QUEUE_SIZE 1024
#define G_GATE_TIMEOUT 0
#define GGATE_MAGIC "GEOM_GATE "
#define GGATE_VERSION 0
#define GGATE_FLAG_RDONLY 0x0001
#define GGATE_FLAG_WRONLY 0x0002
/*
* If GGATE_FLAG_SEND not GGATE_FLAG_RECV flag is set, this is initial
* connection.
* If GGATE_FLAG_SEND flag is set - this is socket to send data.
* If GGATE_FLAG_RECV flag is set - this is socket to receive data.
*/
#define GGATE_FLAG_SEND 0x0004
#define GGATE_FLAG_RECV 0x0008
#define GGATE_CMD_READ 0
#define GGATE_CMD_WRITE 1
extern int g_gate_devfd;
extern int g_gate_verbose;
extern int nagle;
extern unsigned rcvbuf, sndbuf;
struct g_gate_version {
char gv_magic[16];
uint16_t gv_version;
uint16_t gv_error;
} __packed;
/* Client's initial packet. */
struct g_gate_cinit {
char gc_path[PATH_MAX + 1];
uint64_t gc_flags;
uint16_t gc_nconn;
uint32_t gc_token;
} __packed;
/* Server's initial packet. */
struct g_gate_sinit {
uint8_t gs_flags;
uint64_t gs_mediasize;
uint32_t gs_sectorsize;
uint16_t gs_error;
} __packed;
/* Control struct. */
struct g_gate_hdr {
uint8_t gh_cmd; /* command */
uint64_t gh_offset; /* device offset */
uint32_t gh_length; /* size of block */
uint64_t gh_seq; /* request number */
uint16_t gh_error; /* error value (0 if ok) */
} __packed;
void g_gate_vlog(int priority, const char *message, va_list ap);
void g_gate_log(int priority, const char *message, ...);
void g_gate_xvlog(const char *message, va_list ap) __dead2;
void g_gate_xlog(const char *message, ...) __dead2;
off_t g_gate_mediasize(int fd);
unsigned g_gate_sectorsize(int fd);
void g_gate_open_device(void);
void g_gate_close_device(void);
void g_gate_ioctl(unsigned long req, void *data);
void g_gate_destroy(int unit, int force);
void g_gate_load_module(void);
ssize_t g_gate_recv(int s, void *buf, size_t len, int flags);
ssize_t g_gate_send(int s, const void *buf, size_t len, int flags);
void g_gate_socket_settings(int sfd);
#ifdef LIBGEOM
void g_gate_list(int unit, int verbose);
#endif
in_addr_t g_gate_str2ip(const char *str);
/*
* g_gate_swap2h_* - functions swap bytes to host byte order (from big endian).
* g_gate_swap2n_* - functions swap bytes to network byte order (actually
* to big endian byte order).
*/
static __inline void
g_gate_swap2h_version(struct g_gate_version *ver)
{
ver->gv_version = be16toh(ver->gv_version);
ver->gv_error = be16toh(ver->gv_error);
}
static __inline void
g_gate_swap2n_version(struct g_gate_version *ver)
{
ver->gv_version = htobe16(ver->gv_version);
ver->gv_error = htobe16(ver->gv_error);
}
static __inline void
g_gate_swap2h_cinit(struct g_gate_cinit *cinit)
{
cinit->gc_flags = be64toh(cinit->gc_flags);
cinit->gc_nconn = be16toh(cinit->gc_nconn);
cinit->gc_token = be32toh(cinit->gc_token);
}
static __inline void
g_gate_swap2n_cinit(struct g_gate_cinit *cinit)
{
cinit->gc_flags = htobe64(cinit->gc_flags);
cinit->gc_nconn = htobe16(cinit->gc_nconn);
cinit->gc_token = htobe32(cinit->gc_token);
}
static __inline void
g_gate_swap2h_sinit(struct g_gate_sinit *sinit)
{
/* Swap only used fields. */
sinit->gs_mediasize = be64toh(sinit->gs_mediasize);
sinit->gs_sectorsize = be32toh(sinit->gs_sectorsize);
sinit->gs_error = be16toh(sinit->gs_error);
}
static __inline void
g_gate_swap2n_sinit(struct g_gate_sinit *sinit)
{
/* Swap only used fields. */
sinit->gs_mediasize = htobe64(sinit->gs_mediasize);
sinit->gs_sectorsize = htobe32(sinit->gs_sectorsize);
sinit->gs_error = htobe16(sinit->gs_error);
}
static __inline void
g_gate_swap2h_hdr(struct g_gate_hdr *hdr)
{
/* Swap only used fields. */
hdr->gh_offset = be64toh(hdr->gh_offset);
hdr->gh_length = be32toh(hdr->gh_length);
hdr->gh_seq = be64toh(hdr->gh_seq);
hdr->gh_error = be16toh(hdr->gh_error);
}
static __inline void
g_gate_swap2n_hdr(struct g_gate_hdr *hdr)
{
/* Swap only used fields. */
hdr->gh_offset = htobe64(hdr->gh_offset);
hdr->gh_length = htobe32(hdr->gh_length);
hdr->gh_seq = htobe64(hdr->gh_seq);
hdr->gh_error = htobe16(hdr->gh_error);
}
#endif /* _GGATE_H_ */
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