driverdisk.c

linux 安装程序

/*
 * driverdisk.c - driver disk functionality
 *
 * Jeremy Katz <[e-mail]>
 *
 * Copyright 2002-2003 Red Hat, Inc.
 *
 * This software may be freely redistributed under the terms of the GNU
 * General Public License.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <errno.h>
#include <fcntl.h>
#include <kudzu/kudzu.h>
#include <newt.h>
#include <popt.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/stat.h>
#include <unistd.h>

#include "loader.h"
#include "log.h"
#include "loadermisc.h"
#include "lang.h"
#include "method.h"
#include "modules.h"
#include "moduledeps.h"
#include "moduleinfo.h"
#include "windows.h"
#include "hardware.h"
#include "driverdisk.h"
#include "getparts.h"
#include "dirbrowser.h"

#include "nfsinstall.h"
#include "urlinstall.h"

#include "../isys/isys.h"
#include "../isys/imount.h"
#include "../isys/eddsupport.h"

/* boot flags */
extern int flags;

static char * driverDiskFiles[] = { "modinfo", "modules.dep", 
                                    "modules.cgz", "modules.alias", NULL };


static char * optionalFiles[] = { "modules.pcimap", "pci.ids", "pcitable", 
                                  NULL };

static int verifyDriverDisk(char *mntpt) {
    char ** fnPtr;
    char file[200];
    struct stat sb;

    for (fnPtr = driverDiskFiles; *fnPtr; fnPtr++) {
        sprintf(file, "%s/%s", mntpt, *fnPtr);
        if (access(file, R_OK)) {
            logMessage(ERROR, "cannot find %s, bad driver disk", file);
            return LOADER_BACK;
        }
    }

    /* check for both versions */
    sprintf(file, "%s/rhdd", mntpt);
    if (access(file, R_OK)) {
        logMessage(DEBUGLVL, "not a new format driver disk, checking for old");
        sprintf(file, "%s/rhdd-6.1", mntpt);
        if (access(file, R_OK)) {
            logMessage(ERROR, "can't find either driver disk identifier, bad "
                       "driver disk");
        }
    }

    /* side effect: file is still mntpt/ddident */
    stat(file, &sb);
    if (!sb.st_size)
        return LOADER_BACK;

    return LOADER_OK;
}

/* this copies the contents of the driver disk to a ramdisk and loads
 * the moduleinfo, etc.  assumes a "valid" driver disk mounted at mntpt */
static int loadDriverDisk(moduleInfoSet modInfo, moduleList modLoaded,
                          moduleDeps * modDepsPtr, char *mntpt) {
    char file[200], dest[200];
    char * title;
    char ** fnPtr;
    struct moduleBallLocation * location;
    struct stat sb;
    static int disknum = 0;
    int version = 1;
    int fd, ret;

    /* check for both versions */
    sprintf(file, "%s/rhdd", mntpt);
    if (access(file, R_OK)) {
        version = 0;
        sprintf(file, "%s/rhdd-6.1", mntpt);
        if (access(file, R_OK)) {
            /* this can't happen, we already verified it! */
            return LOADER_BACK;
        } 
    }
    stat(file, &sb);
    title = malloc(sb.st_size + 1);

    fd = open(file, O_RDONLY);
    ret = read(fd, title, sb.st_size);
    if (title[sb.st_size - 1] == '\n')
        sb.st_size--;
    title[sb.st_size] = '\0';
    close(fd);

    sprintf(file, "/tmp/ramfs/DD-%d", disknum);
    mkdirChain(file);

    if (!FL_CMDLINE(flags)) {
        startNewt();
        winStatus(40, 3, _("Loading"), _("Reading driver disk..."));
    }

    for (fnPtr = driverDiskFiles; *fnPtr; fnPtr++) {
        sprintf(file, "%s/%s", mntpt, *fnPtr);
        sprintf(dest, "/tmp/ramfs/DD-%d/%s", disknum, *fnPtr);
        copyFile(file, dest);
    }
    for (fnPtr = optionalFiles; *fnPtr; fnPtr++) {
        sprintf(file, "%s/%s", mntpt, *fnPtr);
        sprintf(dest, "/tmp/ramfs/DD-%d/%s", disknum, *fnPtr);
        copyFile(file, dest);
    }

    location = malloc(sizeof(struct moduleBallLocation));
    location->title = strdup(title);
    location->path = sdupprintf("/tmp/ramfs/DD-%d/modules.cgz", disknum);
    location->version = version;

    sprintf(file, "%s/modinfo", mntpt);
    readModuleInfo(file, modInfo, location, 1);

    sprintf(file, "%s/modules.dep", mntpt);
    mlLoadDeps(modDepsPtr, file);

    sprintf(file, "%s/modules.alias", mntpt);
    pciReadDrivers(file);

    if (!FL_CMDLINE(flags))
        newtPopWindow();

    disknum++;
    return 0;
}

/* Get the list of removable devices (floppy/cdrom) available.  Used to
 * find suitable devices for update disk / driver disk source.  
 * Returns the number of devices.  ***devNames will be a NULL-terminated list
 * of device names
 */
int getRemovableDevices(char *** devNames) {
    struct device **devices, **floppies, **cdroms, **disks;
    int numDevices = 0;
    int i = 0, j = 0;

    floppies = probeDevices(CLASS_FLOPPY, 
                            BUS_IDE | BUS_SCSI | BUS_MISC, PROBE_LOADED);
    cdroms = probeDevices(CLASS_CDROM, 
                          BUS_IDE | BUS_SCSI | BUS_MISC, PROBE_LOADED);
    disks = probeDevices(CLASS_HD, 
                         BUS_IDE | BUS_SCSI | BUS_MISC, PROBE_LOADED);

    /* we should probably take detached into account here, but it just
     * means we use a little bit more memory than we really need to */
    if (floppies)
        for (i = 0; floppies[i]; i++) numDevices++;
    if (cdroms)
        for (i = 0; cdroms[i]; i++) numDevices++;
    if (disks)
        for (i = 0; disks[i]; i++) numDevices++;

    /* JKFIXME: better error handling */
    if (!numDevices) {
        logMessage(ERROR, "no devices found to load drivers from");
        return numDevices;
    }

    devices = malloc((numDevices + 1) * sizeof(**devices));

    i = 0;
    if (floppies)
        for (j = 0; floppies[j]; j++) 
            if ((floppies[j]->detached == 0) && (floppies[j]->device != NULL)) 
                devices[i++] = floppies[j];
    if (cdroms)
        for (j = 0; cdroms[j]; j++) 
            if ((cdroms[j]->detached == 0) && (cdroms[j]->device != NULL)) 
                devices[i++] = cdroms[j];
    if (disks)
        for (j = 0; disks[j]; j++) 
            if ((disks[j]->detached == 0) && (disks[j]->device != NULL)) 
                devices[i++] = disks[j];

    devices[i] = NULL;
    numDevices = i;

    for (i = 0; devices[i]; i++) {
        logMessage(DEBUGLVL, "devices[%d] is %s", i, devices[i]->device);
    }

    *devNames = malloc((numDevices + 1) * sizeof(*devNames));
    for (i = 0; devices[i] && (i < numDevices); i++)
        (*devNames)[i] = strdup(devices[i]->device);
    free(devices);
    (*devNames)[i] = NULL;

    if (i != numDevices)
        logMessage(WARNING, "somehow numDevices != len(devices)");

    return numDevices;
}

/* Prompt for loading a driver from "media"
 *
 * class: type of driver to load.
 * usecancel: if 1, use cancel instead of back
 */
int loadDriverFromMedia(int class, moduleList modLoaded, 
                        moduleDeps * modDepsPtr, moduleInfoSet modInfo, 
                        int usecancel, int noprobe) {

    char * device = NULL, * part = NULL, * ddfile = NULL;
    char ** devNames = NULL;
    enum { DEV_DEVICE, DEV_PART, DEV_CHOOSEFILE, DEV_LOADFILE, 
           DEV_INSERT, DEV_LOAD, DEV_PROBE, 
           DEV_DONE } stage = DEV_DEVICE;
    int rc, num = 0;
    int dir = 1;
    int found = 0, before = 0;

    while (stage != DEV_DONE) {
        switch(stage) {
        case DEV_DEVICE:
            rc = getRemovableDevices(&devNames);
            if (rc == 0)
                return LOADER_BACK;

            /* we don't need to ask which to use if they only have one */
            if (rc == 1) {
                device = strdup(devNames[0]);
                free(devNames);
                if (dir == -1)
                    return LOADER_BACK;
                
                stage = DEV_PART;
                break;
            }
            dir = 1;

            startNewt();
            rc = newtWinMenu(_("Driver Disk Source"),
                             _("You have multiple devices which could serve "
                               "as sources for a driver disk.  Which would "
                               "you like to use?"), 40, 10, 10,
                             rc < 6 ? rc : 6, devNames,
                             &num, _("OK"), 
                             (usecancel) ? _("Cancel") : _("Back"), NULL);

            if (rc == 2) {
                free(devNames);
                return LOADER_BACK;
            }
            device = strdup(devNames[num]);
            free(devNames);

            stage = DEV_PART;
        case DEV_PART: {
            char ** part_list = getPartitionsList(device);
            int nump = 0, num = 0;

            if (part != NULL) free(part);

            if ((nump = lenPartitionsList(part_list)) == 0) {
                if (dir == -1)
                    stage = DEV_DEVICE;
                else
                    stage = DEV_INSERT;
                break;
            }
            dir = 1;

            startNewt();
            rc = newtWinMenu(_("Driver Disk Source"),
                             _("There are multiple partitions on this device "
                               "which could contain the driver disk image.  "
                               "Which would you like to use?"), 40, 10, 10,
                             nump < 6 ? nump : 6, part_list, &num, _("OK"),
                             _("Back"), NULL);

            if (rc == 2) {
                freePartitionsList(part_list);
                stage = DEV_DEVICE;
                dir = -1;
                break;
            }

            part = strdup(part_list[num]);
            stage = DEV_CHOOSEFILE;

        }

        case DEV_CHOOSEFILE: {
            if (part == NULL) {
                logMessage(ERROR, "somehow got to choosing file with a NULL part, going back");
                stage = DEV_PART;
                break;
            }
            /* make sure nothing is mounted when we get here */
            num = umount("/tmp/dpart");
            if (num == -1) { 
                logMessage(ERROR, "error unmounting: %s", strerror(errno));
                if ((errno != EINVAL) && (errno != ENOENT))
                    exit(1);
            }

            logMessage(INFO, "trying to mount %s as partition", part);
            devMakeInode(part + 5, "/tmp/ddpart");
            if (doPwMount("/tmp/ddpart", "/tmp/dpart", "vfat", IMOUNT_RDONLY, NULL)) {
                if (doPwMount("/tmp/ddpart", "/tmp/dpart", "ext2", IMOUNT_RDONLY, NULL)) {
                    if (doPwMount("/tmp/ddpart", "/tmp/dpart", "iso9660", IMOUNT_RDONLY, NULL)) {
                        newtWinMessage(_("Error"), _("OK"),
                                       _("Failed to mount partition."));
                        stage = DEV_PART;