2 * Copyright (c) 2014 John Baldwin <jhb@FreeBSD.org>
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 #include <sys/types.h>
35 devctl_request(u_long cmd, struct devreq *req)
37 static int devctl2_fd = -1;
39 if (devctl2_fd == -1) {
40 devctl2_fd = open("/dev/devctl2", O_RDONLY);
44 return (ioctl(devctl2_fd, cmd, req));
48 devctl_simple_request(u_long cmd, const char *name, int flags)
52 memset(&req, 0, sizeof(req));
53 if (strlcpy(req.dr_name, name, sizeof(req.dr_name)) >=
54 sizeof(req.dr_name)) {
59 return (devctl_request(cmd, &req));
63 devctl_attach(const char *device)
66 return (devctl_simple_request(DEV_ATTACH, device, 0));
70 devctl_detach(const char *device, bool force)
73 return (devctl_simple_request(DEV_DETACH, device, force ?
74 DEVF_FORCE_DETACH : 0));
78 devctl_enable(const char *device)
81 return (devctl_simple_request(DEV_ENABLE, device, 0));
85 devctl_disable(const char *device, bool force_detach)
88 return (devctl_simple_request(DEV_DISABLE, device, force_detach ?
89 DEVF_FORCE_DETACH : 0));
93 devctl_suspend(const char *device)
96 return (devctl_simple_request(DEV_SUSPEND, device, 0));
100 devctl_resume(const char *device)
103 return (devctl_simple_request(DEV_RESUME, device, 0));
107 devctl_set_driver(const char *device, const char *driver, bool force)
111 memset(&req, 0, sizeof(req));
112 if (strlcpy(req.dr_name, device, sizeof(req.dr_name)) >=
113 sizeof(req.dr_name)) {
117 req.dr_data = __DECONST(char *, driver);
119 req.dr_flags |= DEVF_SET_DRIVER_DETACH;
120 return (devctl_request(DEV_SET_DRIVER, &req));
124 devctl_clear_driver(const char *device, bool force)
127 return (devctl_simple_request(DEV_CLEAR_DRIVER, device, force ?
128 DEVF_CLEAR_DRIVER_DETACH : 0));
132 devctl_rescan(const char *device)
135 return (devctl_simple_request(DEV_RESCAN, device, 0));
139 devctl_delete(const char *device, bool force)
142 return (devctl_simple_request(DEV_DELETE, device, force ?
143 DEVF_FORCE_DELETE : 0));
150 return (devctl_simple_request(DEV_FREEZE, "", 0));
157 return (devctl_simple_request(DEV_THAW, "", 0));
161 devctl_reset(const char *device, bool detach)
164 return (devctl_simple_request(DEV_RESET, device, detach ?
165 DEVF_RESET_DETACH : 0));
171 devctl_getpath(const char *device, const char *locator, char **buffer)
176 memset(&req, 0, sizeof(req));
177 if (strlcpy(req.dr_name, device, sizeof(req.dr_name)) >=
178 sizeof(req.dr_name)) {
185 * Maybe do the request twice. Once to get the length, and then again to
186 * get the string if BUFLEN bytes is insufficient.
189 req.dr_buffer.length = BUFLEN;
191 req.dr_buffer.buffer = malloc(req.dr_buffer.length);
192 strlcpy(req.dr_buffer.buffer, locator, req.dr_buffer.length);
193 if (devctl_request(DEV_GET_PATH, &req) == 0) {
194 *buffer = req.dr_buffer.buffer;
197 if (errno == ENAMETOOLONG && req.dr_buffer.length != BUFLEN) {
198 free(req.dr_buffer.buffer);
202 free(req.dr_buffer.buffer);