2 * Copyright (c) 2007 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
27 #include <sys/cdefs.h>
28 __FBSDID("$FreeBSD$");
30 #include <sys/param.h>
45 static char *g_device_path_open(const char *, int *, int);
48 * Open the given provider and at least check if this is a block device.
51 g_open(const char *name, int dowrite)
56 path = g_device_path_open(name, &fd, dowrite);
70 g_ioctl_arg(int fd, unsigned long cmd, void *arg)
75 ret = ioctl(fd, cmd, arg);
78 return (ret >= 0 ? 0 : -1);
82 g_ioctl(int fd, unsigned long cmd)
85 return (g_ioctl_arg(fd, cmd, NULL));
89 * Return media size of the given provider.
96 if (g_ioctl_arg(fd, DIOCGMEDIASIZE, &mediasize) == -1)
102 * Return sector size of the given provider.
109 if (g_ioctl_arg(fd, DIOCGSECTORSIZE, §orsize) == -1)
111 return ((ssize_t)sectorsize);
115 * Return stripe size of the given provider.
122 if (g_ioctl_arg(fd, DIOCGSTRIPESIZE, &stripesize) == -1)
128 * Return stripe size of the given provider.
131 g_stripeoffset(int fd)
135 if (g_ioctl_arg(fd, DIOCGSTRIPEOFFSET, &stripeoffset) == -1)
137 return (stripeoffset);
141 * Return the correct provider name.
144 g_providername(int fd)
146 char name[MAXPATHLEN];
148 if (g_ioctl_arg(fd, DIOCGPROVIDERNAME, name) == -1)
150 return (strdup(name));
154 * Call BIO_FLUSH for the given provider.
160 return (g_ioctl(fd, DIOCGFLUSH));
164 * Call BIO_DELETE for the given range.
167 g_delete(int fd, off_t offset, off_t length)
173 return (g_ioctl_arg(fd, DIOCGDELETE, arg));
177 * Return ID of the given provider.
180 g_get_ident(int fd, char *ident, size_t size)
182 char lident[DISK_IDENT_SIZE];
184 if (g_ioctl_arg(fd, DIOCGIDENT, lident) == -1)
186 if (lident[0] == '\0') {
190 if (strlcpy(ident, lident, size) >= size) {
191 errno = ENAMETOOLONG;
198 * Return name of the provider, which has the given ID.
201 g_get_name(const char *ident, char *name, size_t size)
205 fd = g_open_by_ident(ident, 0, name, size);
213 * Find provider name by the given ID.
216 g_open_by_ident(const char *ident, int dowrite, char *name, size_t size)
218 char lident[DISK_IDENT_SIZE];
222 struct gprovider *pp;
225 error = geom_gettree(&mesh);
234 LIST_FOREACH(mp, &mesh.lg_class, lg_class) {
235 LIST_FOREACH(gp, &mp->lg_geom, lg_geom) {
236 LIST_FOREACH(pp, &gp->lg_provider, lg_provider) {
237 fd = g_open(pp->lg_name, dowrite);
240 if (g_get_ident(fd, lident,
241 sizeof(lident)) == -1) {
245 if (strcmp(ident, lident) != 0) {
250 if (name != NULL && strlcpy(name, pp->lg_name,
252 error = ENAMETOOLONG;
260 geom_deletetree(&mesh);
269 * Return the device path device given a partial or full path to its node.
270 * A pointer can be provided, which will be set to an opened file descriptor of
274 g_device_path_open(const char *devpath, int *fdp, int dowrite)
279 /* Make sure that we can fail. */
283 /* Use the device node if we're able to open it. */
284 fd = open(devpath, dowrite ? O_RDWR : O_RDONLY);
286 if ((path = strdup(devpath)) == NULL) {
293 /* If we're not given an absolute path, assume /dev/ prefix. */
297 asprintf(&path, "%s%s", _PATH_DEV, devpath);
300 fd = open(path, dowrite ? O_RDWR : O_RDONLY);
308 * Let try to get sectorsize, which will prove it is a GEOM provider.
310 if (g_sectorsize(fd) == -1) {
324 g_device_path(const char *devpath)
326 return (g_device_path_open(devpath, NULL, 0));