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 __FBSDID("$FreeBSD$");
29 #include <sys/types.h>
38 devctl_request(u_long cmd, struct devreq *req)
40 static int devctl2_fd = -1;
42 if (devctl2_fd == -1) {
43 devctl2_fd = open("/dev/devctl2", O_RDONLY);
47 return (ioctl(devctl2_fd, cmd, req));
51 devctl_simple_request(u_long cmd, const char *name, int flags)
55 memset(&req, 0, sizeof(req));
56 if (strlcpy(req.dr_name, name, sizeof(req.dr_name)) >=
57 sizeof(req.dr_name)) {
62 return (devctl_request(cmd, &req));
66 devctl_attach(const char *device)
69 return (devctl_simple_request(DEV_ATTACH, device, 0));
73 devctl_detach(const char *device, bool force)
76 return (devctl_simple_request(DEV_DETACH, device, force ?
77 DEVF_FORCE_DETACH : 0));
81 devctl_enable(const char *device)
84 return (devctl_simple_request(DEV_ENABLE, device, 0));
88 devctl_disable(const char *device, bool force_detach)
91 return (devctl_simple_request(DEV_DISABLE, device, force_detach ?
92 DEVF_FORCE_DETACH : 0));
96 devctl_suspend(const char *device)
99 return (devctl_simple_request(DEV_SUSPEND, device, 0));
103 devctl_resume(const char *device)
106 return (devctl_simple_request(DEV_RESUME, device, 0));
110 devctl_set_driver(const char *device, const char *driver, bool force)
114 memset(&req, 0, sizeof(req));
115 if (strlcpy(req.dr_name, device, sizeof(req.dr_name)) >=
116 sizeof(req.dr_name)) {
120 req.dr_data = __DECONST(char *, driver);
122 req.dr_flags |= DEVF_SET_DRIVER_DETACH;
123 return (devctl_request(DEV_SET_DRIVER, &req));
127 devctl_clear_driver(const char *device, bool force)
130 return (devctl_simple_request(DEV_CLEAR_DRIVER, device, force ?
131 DEVF_CLEAR_DRIVER_DETACH : 0));
135 devctl_rescan(const char *device)
138 return (devctl_simple_request(DEV_RESCAN, device, 0));
142 devctl_delete(const char *device, bool force)
145 return (devctl_simple_request(DEV_DELETE, device, force ?
146 DEVF_FORCE_DELETE : 0));
153 return (devctl_simple_request(DEV_FREEZE, "", 0));
160 return (devctl_simple_request(DEV_THAW, "", 0));
164 devctl_reset(const char *device, bool detach)
167 return (devctl_simple_request(DEV_RESET, device, detach ?
168 DEVF_RESET_DETACH : 0));
174 devctl_getpath(const char *device, const char *locator, char **buffer)
179 memset(&req, 0, sizeof(req));
180 if (strlcpy(req.dr_name, device, sizeof(req.dr_name)) >=
181 sizeof(req.dr_name)) {
188 * Maybe do the request twice. Once to get the length, and then again to
189 * get the string if BUFLEN bytes is insufficient.
192 req.dr_buffer.length = BUFLEN;
194 req.dr_buffer.buffer = malloc(req.dr_buffer.length);
195 strlcpy(req.dr_buffer.buffer, locator, req.dr_buffer.length);
196 if (devctl_request(DEV_GET_PATH, &req) == 0) {
197 *buffer = req.dr_buffer.buffer;
200 if (errno == ENAMETOOLONG && req.dr_buffer.length != BUFLEN) {
201 free(req.dr_buffer.buffer);
205 free(req.dr_buffer.buffer);