2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/endian.h>
37 #define G_GATE_PORT 3080
39 #define G_GATE_RCVBUF 131072
40 #define G_GATE_SNDBUF 131072
41 #define G_GATE_QUEUE_SIZE 1024
42 #define G_GATE_TIMEOUT 0
44 #define GGATE_MAGIC "GEOM_GATE "
45 #define GGATE_VERSION 0
47 #define GGATE_FLAG_RDONLY 0x0001
48 #define GGATE_FLAG_WRONLY 0x0002
50 * If neither the GGATE_FLAG_SEND nor the GGATE_FLAG_RECV flag is
51 * set - this is initial connection.
52 * If GGATE_FLAG_SEND flag is set - this is socket to send data.
53 * If GGATE_FLAG_RECV flag is set - this is socket to receive data.
55 #define GGATE_FLAG_SEND 0x0004
56 #define GGATE_FLAG_RECV 0x0008
58 #define GGATE_CMD_READ 0
59 #define GGATE_CMD_WRITE 1
60 #define GGATE_CMD_FLUSH 3
62 extern int g_gate_devfd;
63 extern int g_gate_verbose;
66 extern unsigned rcvbuf, sndbuf;
68 struct g_gate_version {
74 /* Client's initial packet. */
76 char gc_path[PATH_MAX + 1];
82 /* Server's initial packet. */
85 uint64_t gs_mediasize;
86 uint32_t gs_sectorsize;
92 uint8_t gh_cmd; /* command */
93 uint64_t gh_offset; /* device offset */
94 uint32_t gh_length; /* size of block */
95 uint64_t gh_seq; /* request number */
96 uint16_t gh_error; /* error value (0 if ok) */
99 void g_gate_vlog(int priority, const char *message, va_list ap);
100 void g_gate_log(int priority, const char *message, ...);
101 void g_gate_xvlog(const char *message, va_list ap) __dead2;
102 void g_gate_xlog(const char *message, ...) __dead2;
103 off_t g_gate_mediasize(int fd);
104 unsigned g_gate_sectorsize(int fd);
105 void g_gate_open_device(void);
106 void g_gate_close_device(void);
107 void g_gate_ioctl(unsigned long req, void *data);
108 void g_gate_destroy(int unit, int force);
109 void g_gate_load_module(void);
110 ssize_t g_gate_recv(int s, void *buf, size_t len, int flags);
111 ssize_t g_gate_send(int s, const void *buf, size_t len, int flags);
112 void g_gate_socket_settings(int sfd);
114 void g_gate_list(int unit, int verbose);
116 in_addr_t g_gate_str2ip(const char *str);
119 * g_gate_swap2h_* - functions swap bytes to host byte order (from big endian).
120 * g_gate_swap2n_* - functions swap bytes to network byte order (actually
121 * to big endian byte order).
125 g_gate_swap2h_version(struct g_gate_version *ver)
128 ver->gv_version = be16toh(ver->gv_version);
129 ver->gv_error = be16toh(ver->gv_error);
133 g_gate_swap2n_version(struct g_gate_version *ver)
136 ver->gv_version = htobe16(ver->gv_version);
137 ver->gv_error = htobe16(ver->gv_error);
141 g_gate_swap2h_cinit(struct g_gate_cinit *cinit)
144 cinit->gc_flags = be64toh(cinit->gc_flags);
145 cinit->gc_nconn = be16toh(cinit->gc_nconn);
146 cinit->gc_token = be32toh(cinit->gc_token);
150 g_gate_swap2n_cinit(struct g_gate_cinit *cinit)
153 cinit->gc_flags = htobe64(cinit->gc_flags);
154 cinit->gc_nconn = htobe16(cinit->gc_nconn);
155 cinit->gc_token = htobe32(cinit->gc_token);
159 g_gate_swap2h_sinit(struct g_gate_sinit *sinit)
162 /* Swap only used fields. */
163 sinit->gs_mediasize = be64toh(sinit->gs_mediasize);
164 sinit->gs_sectorsize = be32toh(sinit->gs_sectorsize);
165 sinit->gs_error = be16toh(sinit->gs_error);
169 g_gate_swap2n_sinit(struct g_gate_sinit *sinit)
172 /* Swap only used fields. */
173 sinit->gs_mediasize = htobe64(sinit->gs_mediasize);
174 sinit->gs_sectorsize = htobe32(sinit->gs_sectorsize);
175 sinit->gs_error = htobe16(sinit->gs_error);
179 g_gate_swap2h_hdr(struct g_gate_hdr *hdr)
182 /* Swap only used fields. */
183 hdr->gh_offset = be64toh(hdr->gh_offset);
184 hdr->gh_length = be32toh(hdr->gh_length);
185 hdr->gh_seq = be64toh(hdr->gh_seq);
186 hdr->gh_error = be16toh(hdr->gh_error);
190 g_gate_swap2n_hdr(struct g_gate_hdr *hdr)
193 /* Swap only used fields. */
194 hdr->gh_offset = htobe64(hdr->gh_offset);
195 hdr->gh_length = htobe32(hdr->gh_length);
196 hdr->gh_seq = htobe64(hdr->gh_seq);
197 hdr->gh_error = htobe16(hdr->gh_error);
199 #endif /* _GGATE_H_ */