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/*-
* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
* Copyright (c) 2006 Marcel Moolenaar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <stand.h>
#include <string.h>
#include <sys/disklabel.h>
#include <sys/param.h>
#include <bootstrap.h>
#include <disk.h>
#include <efi.h>
#include <efilib.h>
#include <efizfs.h>
static int efi_parsedev(struct devdesc **, const char *, const char **);
/*
* Point (dev) at an allocated device specifier for the device matching the
* path in (devspec). If it contains an explicit device specification,
* use that. If not, use the default device.
*/
int
efi_getdev(void **vdev, const char *devspec, const char **path)
{
struct devdesc **dev = (struct devdesc **)vdev;
int rv;
/*
* If it looks like this is just a path and no device, then
* use the current device instead.
*/
if (devspec == NULL || *devspec == '/' || !strchr(devspec, ':')) {
rv = efi_parsedev(dev, getenv("currdev"), NULL);
if (rv == 0 && path != NULL)
*path = devspec;
return (rv);
}
/* Parse the device name off the beginning of the devspec. */
return (efi_parsedev(dev, devspec, path));
}
/*
* Point (dev) at an allocated device specifier matching the string version
* at the beginning of (devspec). Return a pointer to the remaining
* text in (path).
*
* In all cases, the beginning of (devspec) is compared to the names
* of known devices in the device switch, and then any following text
* is parsed according to the rules applied to the device type.
*
* For disk-type devices, the syntax is:
*
* fs<unit>:
*/
static int
efi_parsedev(struct devdesc **dev, const char *devspec, const char **path)
{
struct devdesc *idev;
struct devsw *dv;
int i, unit, err;
char *cp;
const char *np;
/* minimum length check */
if (strlen(devspec) < 2)
return (EINVAL);
/* look for a device that matches */
for (i = 0; devsw[i] != NULL; i++) {
dv = devsw[i];
if (!strncmp(devspec, dv->dv_name, strlen(dv->dv_name)))
break;
}
if (devsw[i] == NULL)
return (ENOENT);
np = devspec + strlen(dv->dv_name);
idev = NULL;
err = 0;
switch (dv->dv_type) {
case DEVT_NONE:
break;
case DEVT_DISK:
idev = malloc(sizeof(struct disk_devdesc));
if (idev == NULL)
return (ENOMEM);
err = disk_parsedev((struct disk_devdesc *)idev, np, path);
if (err != 0)
goto fail;
break;
#ifdef EFI_ZFS_BOOT
case DEVT_ZFS:
idev = malloc(sizeof(struct zfs_devdesc));
if (idev == NULL)
return (ENOMEM);
err = zfs_parsedev((struct zfs_devdesc*)idev, np, path);
if (err != 0)
goto fail;
break;
#endif
default:
idev = malloc(sizeof(struct devdesc));
if (idev == NULL)
return (ENOMEM);
unit = 0;
cp = (char *)np;
if (*np != '\0' && *np != ':') {
errno = 0;
unit = strtol(np, &cp, 0);
if (errno != 0 || cp == np) {
err = EUNIT;
goto fail;
}
}
if (*cp != '\0' && *cp != ':') {
err = EINVAL;
goto fail;
}
idev->d_unit = unit;
if (path != NULL)
*path = (*cp == 0) ? cp : cp + 1;
break;
}
idev->d_dev = dv;
if (dev != NULL)
*dev = idev;
else
free(idev);
return (0);
fail:
free(idev);
return (err);
}
/*
* Set currdev to suit the value being supplied in (value)
*/
int
efi_setcurrdev(struct env_var *ev, int flags, const void *value)
{
struct devdesc *ncurr;
int rv;
rv = efi_parsedev(&ncurr, value, NULL);
if (rv != 0)
return (rv);
free(ncurr);
return (mount_currdev(ev, flags, value));
}
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