33bbe5ddcb
To support more flexible device matching, we now pass in the full devspec to the parsedev routines. For everything execpt uboot, this is just a drop in (since everything except uboot and openfirmware always uses disk...: and/or zfs:, but openfirmware isn't really affected). uboot we kludge around it by subtracting 4 from where the rest of the device name starts. This is unforunate, and can compute the address one before the string. But we never dereference that address. uboot needs more work, and this is an acceptable UB until that other work happens. OFW doesn't really use the parsedev routines these days (since none of the supported device uses this... yet). It too needs more work, but it needs device matching support first. Sponsored by: Netflix Reviewed by: delphij Differential Revision: https://reviews.freebsd.org/D37553
144 lines
4.0 KiB
C
144 lines
4.0 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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <stand.h>
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#include "bootstrap.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 device, go with the current
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* device.
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*/
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if (devspec == NULL || strpbrk(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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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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phandle_t handle;
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const char *p;
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const char *s;
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char *ep;
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char name[256];
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char type[64];
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int err;
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int len;
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int i;
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for (p = s = devspec; *s != '\0'; p = s) {
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if ((s = strchr(p + 1, '/')) == NULL)
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s = strchr(p, '\0');
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len = s - devspec;
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bcopy(devspec, name, len);
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name[len] = '\0';
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if ((handle = OF_finddevice(name)) == -1) {
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bcopy(name, type, len);
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type[len] = '\0';
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} else if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1)
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continue;
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for (i = 0; (dv = devsw[i]) != NULL; i++) {
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if (strncmp(dv->dv_name, type, strlen(dv->dv_name)) == 0)
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goto found;
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}
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}
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return(ENOENT);
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found:
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if (path != NULL)
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*path = s;
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idev = malloc(sizeof(struct ofw_devdesc));
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if (idev == NULL) {
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printf("ofw_parsedev: malloc failed\n");
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return ENOMEM;
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}
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idev->dd.d_dev = dv;
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if (dv->dv_parsedev != NULL) {
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p = devspec + strlen(dv->dv_name);
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free(idev);
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err = dv->dv_parsedev((struct devdesc **)&idev, devspec, path);
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if (err != 0) {
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return (err);
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}
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} else {
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strcpy(idev->d_path, name);
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}
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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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}
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int
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ofw_setcurrdev(struct env_var *ev, int flags, const 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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return (mount_currdev(ev, flags, value));
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}
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