2 * Copyright (c) 2004 Pawel Jakub Dawidek <pjd@FreeBSD.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 #include <sys/endian.h>
35 #define G_GATE_PORT 3080
37 #define G_GATE_RCVBUF 131072
38 #define G_GATE_SNDBUF 131072
39 #define G_GATE_QUEUE_SIZE 1024
40 #define G_GATE_TIMEOUT 0
42 #define GGATE_MAGIC "GEOM_GATE "
43 #define GGATE_VERSION 0
45 #define GGATE_FLAG_RDONLY 0x0001
46 #define GGATE_FLAG_WRONLY 0x0002
48 * If GGATE_FLAG_SEND not GGATE_FLAG_RECV flag is set, this is initial
50 * If GGATE_FLAG_SEND flag is set - this is socket to send data.
51 * If GGATE_FLAG_RECV flag is set - this is socket to receive data.
53 #define GGATE_FLAG_SEND 0x0004
54 #define GGATE_FLAG_RECV 0x0008
56 #define GGATE_CMD_READ 0
57 #define GGATE_CMD_WRITE 1
59 extern int g_gate_devfd;
60 extern int g_gate_verbose;
63 extern unsigned rcvbuf, sndbuf;
65 struct g_gate_version {
71 /* Client's initial packet. */
73 char gc_path[PATH_MAX + 1];
79 /* Server's initial packet. */
82 uint64_t gs_mediasize;
83 uint32_t gs_sectorsize;
89 uint8_t gh_cmd; /* command */
90 uint64_t gh_offset; /* device offset */
91 uint32_t gh_length; /* size of block */
92 uint64_t gh_seq; /* request number */
93 uint16_t gh_error; /* error value (0 if ok) */
96 void g_gate_vlog(int priority, const char *message, va_list ap);
97 void g_gate_log(int priority, const char *message, ...);
98 void g_gate_xvlog(const char *message, va_list ap);
99 void g_gate_xlog(const char *message, ...);
100 off_t g_gate_mediasize(int fd);
101 unsigned g_gate_sectorsize(int fd);
102 void g_gate_open_device(void);
103 void g_gate_close_device(void);
104 void g_gate_ioctl(unsigned long req, void *data);
105 void g_gate_destroy(int unit, int force);
106 void g_gate_load_module(void);
107 ssize_t g_gate_recv(int s, void *buf, size_t len, int flags);
108 ssize_t g_gate_send(int s, const void *buf, size_t len, int flags);
109 void g_gate_socket_settings(int sfd);
111 void g_gate_list(int unit, int verbose);
113 in_addr_t g_gate_str2ip(const char *str);
116 * g_gate_swap2h_* - functions swap bytes to host byte order (from big endian).
117 * g_gate_swap2n_* - functions swap bytes to network byte order (actually
118 * to big endian byte order).
122 g_gate_swap2h_version(struct g_gate_version *ver)
125 ver->gv_version = be16toh(ver->gv_version);
126 ver->gv_error = be16toh(ver->gv_error);
130 g_gate_swap2n_version(struct g_gate_version *ver)
133 ver->gv_version = htobe16(ver->gv_version);
134 ver->gv_error = htobe16(ver->gv_error);
138 g_gate_swap2h_cinit(struct g_gate_cinit *cinit)
141 cinit->gc_flags = be64toh(cinit->gc_flags);
142 cinit->gc_nconn = be16toh(cinit->gc_nconn);
143 cinit->gc_token = be32toh(cinit->gc_token);
147 g_gate_swap2n_cinit(struct g_gate_cinit *cinit)
150 cinit->gc_flags = htobe64(cinit->gc_flags);
151 cinit->gc_nconn = htobe16(cinit->gc_nconn);
152 cinit->gc_token = htobe32(cinit->gc_token);
156 g_gate_swap2h_sinit(struct g_gate_sinit *sinit)
159 /* Swap only used fields. */
160 sinit->gs_mediasize = be64toh(sinit->gs_mediasize);
161 sinit->gs_sectorsize = be32toh(sinit->gs_sectorsize);
162 sinit->gs_error = be16toh(sinit->gs_error);
166 g_gate_swap2n_sinit(struct g_gate_sinit *sinit)
169 /* Swap only used fields. */
170 sinit->gs_mediasize = htobe64(sinit->gs_mediasize);
171 sinit->gs_sectorsize = htobe32(sinit->gs_sectorsize);
172 sinit->gs_error = htobe16(sinit->gs_error);
176 g_gate_swap2h_hdr(struct g_gate_hdr *hdr)
179 /* Swap only used fields. */
180 hdr->gh_offset = be64toh(hdr->gh_offset);
181 hdr->gh_length = be32toh(hdr->gh_length);
182 hdr->gh_seq = be64toh(hdr->gh_seq);
183 hdr->gh_error = be16toh(hdr->gh_error);
187 g_gate_swap2n_hdr(struct g_gate_hdr *hdr)
190 /* Swap only used fields. */
191 hdr->gh_offset = htobe64(hdr->gh_offset);
192 hdr->gh_length = htobe32(hdr->gh_length);
193 hdr->gh_seq = htobe64(hdr->gh_seq);
194 hdr->gh_error = htobe16(hdr->gh_error);
196 #endif /* _GGATE_H_ */