254 lines
6.1 KiB
C
254 lines
6.1 KiB
C
/*-
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* Copyright (c) 1998 Michael Smith <msmith@freebsd.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <stand.h>
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#include <sys/disklabel.h>
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#include "libofw.h"
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static int ofw_parsedev(struct ofw_devdesc **, const char *, const char **);
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/*
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* Point (dev) at an allocated device specifier for the device matching the
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* path in (devspec). If it contains an explicit device specification,
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* use that. If not, use the default device.
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*/
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int
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ofw_getdev(void **vdev, const char *devspec, const char **path)
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{
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struct ofw_devdesc **dev = (struct ofw_devdesc **)vdev;
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int rv;
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/*
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* If it looks like this is just a path and no
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* device, go with the current device.
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*/
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if ((devspec == NULL) ||
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(devspec[0] == '/') ||
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(strchr(devspec, ':') == NULL)) {
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if (((rv = ofw_parsedev(dev, getenv("currdev"), NULL)) == 0) &&
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(path != NULL))
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*path = devspec;
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return(rv);
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}
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/*
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* Try to parse the device name off the beginning of the devspec
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*/
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return(ofw_parsedev(dev, devspec, path));
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}
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/*
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* Point (dev) at an allocated device specifier matching the string version
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* at the beginning of (devspec). Return a pointer to the remaining
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* text in (path).
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*
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* In all cases, the beginning of (devspec) is compared to the names
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* of known devices in the device switch, and then any following text
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* is parsed according to the rules applied to the device type.
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*
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* For disk-type devices, the syntax is:
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*
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* disk<unit>[s<slice>][<partition>]:
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*
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*/
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static int
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ofw_parsedev(struct ofw_devdesc **dev, const char *devspec, const char **path)
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{
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struct ofw_devdesc *idev;
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struct devsw *dv;
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int i, unit, slice, partition, err;
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char *cp;
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const char *np;
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/* minimum length check */
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if (strlen(devspec) < 2)
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return(EINVAL);
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/* look for a device that matches */
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for (i = 0, dv = NULL; devsw[i] != NULL; i++) {
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if (!strncmp(devspec, devsw[i]->dv_name, strlen(devsw[i]->dv_name))) {
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dv = devsw[i];
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break;
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}
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}
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if (dv == NULL)
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return(ENOENT);
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idev = malloc(sizeof(struct ofw_devdesc));
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err = 0;
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np = (devspec + strlen(dv->dv_name));
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switch(dv->dv_type) {
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case DEVT_NONE: /* XXX what to do here? Do we care? */
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break;
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case DEVT_DISK:
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unit = -1;
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slice = -1;
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partition = -1;
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if (*np && (*np != ':')) {
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unit = strtol(np, &cp, 10); /* next comes the unit number */
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if (cp == np) {
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err = EUNIT;
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goto fail;
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}
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if (*cp == 's') { /* got a slice number */
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np = cp + 1;
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slice = strtol(np, &cp, 10);
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if (cp == np) {
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err = ESLICE;
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goto fail;
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}
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}
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if (*cp && (*cp != ':')) {
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partition = *cp - 'a'; /* get a partition number */
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if ((partition < 0) || (partition >= MAXPARTITIONS)) {
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err = EPART;
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goto fail;
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}
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cp++;
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}
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}
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if (*cp && (*cp != ':')) {
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err = EINVAL;
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goto fail;
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}
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idev->d_kind.ofwdisk.unit = unit;
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idev->d_kind.ofwdisk.slice = slice;
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idev->d_kind.ofwdisk.partition = partition;
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if (path != NULL)
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*path = (*cp == 0) ? cp : cp + 1;
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break;
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case DEVT_NET:
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unit = 0;
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if (*np && (*np != ':')) {
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unit = strtol(np, &cp, 0); /* get unit number if present */
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if (cp == np) {
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err = EUNIT;
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goto fail;
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}
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}
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if (*cp && (*cp != ':')) {
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err = EINVAL;
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goto fail;
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}
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idev->d_kind.netif.unit = unit;
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if (path != NULL)
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*path = (*cp == 0) ? cp : cp + 1;
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break;
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default:
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err = EINVAL;
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goto fail;
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}
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idev->d_dev = dv;
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idev->d_type = dv->dv_type;
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if (dev == NULL) {
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free(idev);
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} else {
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*dev = idev;
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}
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return(0);
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fail:
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free(idev);
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return(err);
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}
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/* hack to correctly parse bootpath for currdev. */
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int
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ofw_parseofwdev(struct ofw_devdesc *dev, const char *devspec)
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{
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char *cp, *ep;
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int i;
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struct devsw *dv;
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if ((cp = strrchr(devspec, '@')) == 0)
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return EINVAL;
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cp++;
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ep = cp;
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dev->d_kind.ofwdisk.unit = strtol(cp, &cp, 10);
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if (cp == ep)
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return EUNIT;
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if (*cp != ',')
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return ESLICE;
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ep = ++cp;
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dev->d_kind.ofwdisk.slice = strtol(cp, &cp, 10) + 1;
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if (cp == ep)
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return ESLICE;
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if (*cp != ':')
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return EPART;
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dev->d_kind.ofwdisk.partition = *++cp - 'a';
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}
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char *
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ofw_fmtdev(void *vdev)
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{
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struct ofw_devdesc *dev = (struct ofw_devdesc *)vdev;
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static char buf[128];
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char *cp;
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switch(dev->d_type) {
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case DEVT_NONE:
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strcpy(buf, "(no device)");
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break;
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case DEVT_DISK:
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sprintf(buf, "%s%ds%d%c:", dev->d_dev->dv_name,
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dev->d_kind.ofwdisk.unit, dev->d_kind.ofwdisk.slice,
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dev->d_kind.ofwdisk.partition + 'a');
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break;
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case DEVT_NET:
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sprintf(buf, "%s%d:", dev->d_dev->dv_name,
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dev->d_kind.netif.unit);
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break;
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}
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return buf;
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}
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int
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ofw_setcurrdev(struct env_var *ev, int flags, void *value)
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{
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struct ofw_devdesc *ncurr;
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int rv;
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if ((rv = ofw_parsedev(&ncurr, value, NULL)) != 0)
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return rv;
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free(ncurr);
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env_setenv(ev->ev_name, flags | EV_NOHOOK, value, NULL, NULL);
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return 0;
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}
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