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/cdefs.h>
27 #include <sys/types.h>
36 devctl_request(u_long cmd, struct devreq *req)
38 static int devctl2_fd = -1;
40 if (devctl2_fd == -1) {
41 devctl2_fd = open("/dev/devctl2", O_RDONLY);
45 return (ioctl(devctl2_fd, cmd, req));
49 devctl_simple_request(u_long cmd, const char *name, int flags)
53 memset(&req, 0, sizeof(req));
54 if (strlcpy(req.dr_name, name, sizeof(req.dr_name)) >=
55 sizeof(req.dr_name)) {
60 return (devctl_request(cmd, &req));
64 devctl_attach(const char *device)
67 return (devctl_simple_request(DEV_ATTACH, device, 0));
71 devctl_detach(const char *device, bool force)
74 return (devctl_simple_request(DEV_DETACH, device, force ?
75 DEVF_FORCE_DETACH : 0));
79 devctl_enable(const char *device)
82 return (devctl_simple_request(DEV_ENABLE, device, 0));
86 devctl_disable(const char *device, bool force_detach)
89 return (devctl_simple_request(DEV_DISABLE, device, force_detach ?
90 DEVF_FORCE_DETACH : 0));
94 devctl_suspend(const char *device)
97 return (devctl_simple_request(DEV_SUSPEND, device, 0));
101 devctl_resume(const char *device)
104 return (devctl_simple_request(DEV_RESUME, device, 0));
108 devctl_set_driver(const char *device, const char *driver, bool force)
112 memset(&req, 0, sizeof(req));
113 if (strlcpy(req.dr_name, device, sizeof(req.dr_name)) >=
114 sizeof(req.dr_name)) {
118 req.dr_data = __DECONST(char *, driver);
120 req.dr_flags |= DEVF_SET_DRIVER_DETACH;
121 return (devctl_request(DEV_SET_DRIVER, &req));
125 devctl_clear_driver(const char *device, bool force)
128 return (devctl_simple_request(DEV_CLEAR_DRIVER, device, force ?
129 DEVF_CLEAR_DRIVER_DETACH : 0));
133 devctl_rescan(const char *device)
136 return (devctl_simple_request(DEV_RESCAN, device, 0));
140 devctl_delete(const char *device, bool force)
143 return (devctl_simple_request(DEV_DELETE, device, force ?
144 DEVF_FORCE_DELETE : 0));
151 return (devctl_simple_request(DEV_FREEZE, "", 0));
158 return (devctl_simple_request(DEV_THAW, "", 0));
162 devctl_reset(const char *device, bool detach)
165 return (devctl_simple_request(DEV_RESET, device, detach ?
166 DEVF_RESET_DETACH : 0));
172 devctl_getpath(const char *device, const char *locator, char **buffer)
177 memset(&req, 0, sizeof(req));
178 if (strlcpy(req.dr_name, device, sizeof(req.dr_name)) >=
179 sizeof(req.dr_name)) {
186 * Maybe do the request twice. Once to get the length, and then again to
187 * get the string if BUFLEN bytes is insufficient.
190 req.dr_buffer.length = BUFLEN;
192 req.dr_buffer.buffer = malloc(req.dr_buffer.length);
193 strlcpy(req.dr_buffer.buffer, locator, req.dr_buffer.length);
194 if (devctl_request(DEV_GET_PATH, &req) == 0) {
195 *buffer = req.dr_buffer.buffer;
198 if (errno == ENAMETOOLONG && req.dr_buffer.length != BUFLEN) {
199 free(req.dr_buffer.buffer);
203 free(req.dr_buffer.buffer);