summaryrefslogtreecommitdiffstats
path: root/sys/kern/vfs_conf.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/kern/vfs_conf.c')
-rw-r--r--sys/kern/vfs_conf.c396
1 files changed, 0 insertions, 396 deletions
diff --git a/sys/kern/vfs_conf.c b/sys/kern/vfs_conf.c
deleted file mode 100644
index 20d9b90..0000000
--- a/sys/kern/vfs_conf.c
+++ /dev/null
@@ -1,396 +0,0 @@
-/*-
- * Copyright (c) 1999 Michael Smith
- * All rights reserved.
- * Copyright (c) 1999 Poul-Henning Kamp
- * 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.
- *
- * $FreeBSD$
- */
-
-/*
- * Locate and mount the root filesystem.
- *
- * The root filesystem is detailed in the kernel environment variable
- * vfs.root.mountfrom, which is expected to be in the general format
- *
- * <vfsname>:[<path>]
- * vfsname := the name of a VFS known to the kernel and capable
- * of being mounted as root
- * path := disk device name or other data used by the filesystem
- * to locate its physical store
- *
- */
-
-#include "opt_rootdevname.h"
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/kernel.h>
-#include <sys/lock.h>
-#include <sys/mutex.h>
-#include <sys/vnode.h>
-#include <sys/mount.h>
-#include <sys/malloc.h>
-#include <sys/reboot.h>
-#include <sys/diskslice.h>
-#include <sys/disklabel.h>
-#include <sys/conf.h>
-#include <sys/cons.h>
-#include <sys/proc.h>
-
-#include "opt_ddb.h"
-
-#ifdef DDB
-#include <ddb/ddb.h>
-#endif
-
-#include <paths.h>
-
-MALLOC_DEFINE(M_MOUNT, "mount", "vfs mount structure");
-
-#define ROOTNAME "root_device"
-
-/*
- * The vnode of the system's root (/ in the filesystem, without chroot
- * active.)
- */
-struct vnode *rootvnode;
-
-/*
- * The root specifiers we will try if RB_CDROM is specified.
- */
-static char *cdrom_rootdevnames[] = {
- "cd9660:cd0a",
- "cd9660:acd0a",
- "cd9660:wcd0a",
- NULL
-};
-
-static int vfs_mountroot_try(char *mountfrom);
-static int vfs_mountroot_ask(void);
-static void gets(char *cp);
-
-/* legacy find-root code */
-char *rootdevnames[2] = {NULL, NULL};
-static int setrootbyname(char *name);
-dev_t rootdev = NODEV;
-
-/*
- * Find and mount the root filesystem
- */
-void
-vfs_mountroot(void *foo __unused)
-{
- char *cp;
- int i, error;
-
- /*
- * The root filesystem information is compiled in, and we are
- * booted with instructions to use it.
- */
-#ifdef ROOTDEVNAME
- if ((boothowto & RB_DFLTROOT) &&
- !vfs_mountroot_try(ROOTDEVNAME))
- return;
-#endif
- /*
- * We are booted with instructions to prompt for the root filesystem,
- * or to use the compiled-in default when it doesn't exist.
- */
- if (boothowto & (RB_DFLTROOT | RB_ASKNAME)) {
- if (!vfs_mountroot_ask())
- return;
- }
-
- /*
- * We've been given the generic "use CDROM as root" flag. This is
- * necessary because one media may be used in many different
- * devices, so we need to search for them.
- */
- if (boothowto & RB_CDROM) {
- for (i = 0; cdrom_rootdevnames[i] != NULL; i++) {
- if (!vfs_mountroot_try(cdrom_rootdevnames[i]))
- return;
- }
- }
-
- /*
- * Try to use the value read by the loader from /etc/fstab, or
- * supplied via some other means. This is the preferred
- * mechanism.
- */
- if ((cp = getenv("vfs.root.mountfrom")) != NULL) {
- error = vfs_mountroot_try(cp);
- freeenv(cp);
- if (!error)
- return;
- }
-
- /*
- * Try values that may have been computed by the machine-dependant
- * legacy code.
- */
- if (!vfs_mountroot_try(rootdevnames[0]))
- return;
- if (!vfs_mountroot_try(rootdevnames[1]))
- return;
-
- /*
- * If we have a compiled-in default, and haven't already tried it, try
- * it now.
- */
-#ifdef ROOTDEVNAME
- if (!(boothowto & RB_DFLTROOT))
- if (!vfs_mountroot_try(ROOTDEVNAME))
- return;
-#endif
-
- /*
- * Everything so far has failed, prompt on the console if we haven't
- * already tried that.
- */
- if (!(boothowto & (RB_DFLTROOT | RB_ASKNAME)) && !vfs_mountroot_ask())
- return;
- panic("Root mount failed, startup aborted.");
-}
-
-/*
- * Mount (mountfrom) as the root filesystem.
- */
-static int
-vfs_mountroot_try(char *mountfrom)
-{
- struct mount *mp;
- char *vfsname, *path;
- int error;
- char patt[32];
- int s;
-
- vfsname = NULL;
- path = NULL;
- mp = NULL;
- error = EINVAL;
-
- if (mountfrom == NULL)
- return(error); /* don't complain */
-
- s = splcam(); /* Overkill, but annoying without it */
- printf("Mounting root from %s\n", mountfrom);
- splx(s);
-
- /* parse vfs name and path */
- vfsname = malloc(MFSNAMELEN, M_MOUNT, M_WAITOK);
- path = malloc(MNAMELEN, M_MOUNT, M_WAITOK);
- vfsname[0] = path[0] = 0;
- sprintf(patt, "%%%d[a-z0-9]:%%%ds", MFSNAMELEN, MNAMELEN);
- if (sscanf(mountfrom, patt, vfsname, path) < 1)
- goto done;
-
- /* allocate a root mount */
- error = vfs_rootmountalloc(vfsname, path[0] != 0 ? path : ROOTNAME,
- &mp);
- if (error != 0) {
- printf("Can't allocate root mount for filesystem '%s': %d\n",
- vfsname, error);
- goto done;
- }
- mp->mnt_flag |= MNT_ROOTFS;
-
- /* do our best to set rootdev */
- if ((path[0] != 0) && setrootbyname(path))
- printf("setrootbyname failed\n");
-
- /* If the root device is a type "memory disk", mount RW */
- if (rootdev != NODEV && devsw(rootdev) &&
- (devsw(rootdev)->d_flags & D_MEMDISK))
- mp->mnt_flag &= ~MNT_RDONLY;
-
- /*
- * Set the mount path to be something useful, because the
- * filesystem code isn't responsible now for initialising
- * f_mntonname unless they want to override the default
- * (which is `path'.)
- */
- strncpy(mp->mnt_stat.f_mntonname, "/", MNAMELEN);
-
- error = VFS_MOUNT(mp, NULL, NULL, NULL, curthread);
-
-done:
- if (vfsname != NULL)
- free(vfsname, M_MOUNT);
- if (path != NULL)
- free(path, M_MOUNT);
- if (error != 0) {
- if (mp != NULL) {
- vfs_unbusy(mp, curthread);
- free(mp, M_MOUNT);
- }
- printf("Root mount failed: %d\n", error);
- } else {
-
- /* register with list of mounted filesystems */
- mtx_lock(&mountlist_mtx);
- TAILQ_INSERT_HEAD(&mountlist, mp, mnt_list);
- mtx_unlock(&mountlist_mtx);
-
- /* sanity check system clock against root filesystem timestamp */
- inittodr(mp->mnt_time);
- vfs_unbusy(mp, curthread);
- }
- return(error);
-}
-
-/*
- * Spin prompting on the console for a suitable root filesystem
- */
-static int
-vfs_mountroot_ask(void)
-{
- char name[128];
- int i;
- dev_t dev;
-
- for(;;) {
- printf("\nManual root filesystem specification:\n");
- printf(" <fstype>:<device> Mount <device> using filesystem <fstype>\n");
-#if defined(__i386__) || defined(__ia64__)
- printf(" eg. ufs:da0s1a\n");
-#else
- printf(" eg. ufs:da0a\n");
-#endif
- printf(" ? List valid disk boot devices\n");
- printf(" <empty line> Abort manual input\n");
- printf("\nmountroot> ");
- gets(name);
- if (name[0] == 0)
- return(1);
- if (name[0] == '?') {
- printf("Possibly valid devices for 'ufs' root:\n");
- for (i = 0; i < NUMCDEVSW; i++) {
- dev = makedev(i, 0);
- if (devsw(dev) != NULL)
- printf(" \"%s\"", devsw(dev)->d_name);
- }
- printf("\n");
- continue;
- }
- if (!vfs_mountroot_try(name))
- return(0);
- }
-}
-
-/*
- * Local helper function for vfs_mountroot_ask.
- */
-static void
-gets(char *cp)
-{
- char *lp;
- int c;
-
- lp = cp;
- for (;;) {
- printf("%c", c = cngetc() & 0177);
- switch (c) {
- case -1:
- case '\n':
- case '\r':
- *lp++ = '\0';
- return;
- case '\b':
- case '\177':
- if (lp > cp) {
- printf(" \b");
- lp--;
- }
- continue;
- case '#':
- lp--;
- if (lp < cp)
- lp = cp;
- continue;
- case '@':
- case 'u' & 037:
- lp = cp;
- printf("%c", '\n');
- continue;
- default:
- *lp++ = c;
- }
- }
-}
-
-/*
- * Convert a given name to the dev_t of the disk-like device
- * it refers to.
- */
-dev_t
-getdiskbyname(char *name) {
- char *cp;
- dev_t dev;
-
- cp = name;
- if (!bcmp(cp, "/dev/", 5))
- cp += 5;
-
- dev = NODEV;
- EVENTHANDLER_INVOKE(dev_clone, cp, strlen(cp), &dev);
- return (dev);
-}
-
-/*
- * Set rootdev to match (name), given that we expect it to
- * refer to a disk-like device.
- */
-static int
-setrootbyname(char *name)
-{
- dev_t diskdev;
-
- diskdev = getdiskbyname(name);
- if (diskdev != NODEV) {
- rootdev = diskdev;
- return (0);
- }
-
- return (1);
-}
-
-/* Show the dev_t for a disk specified by name */
-#ifdef DDB
-DB_SHOW_COMMAND(disk, db_getdiskbyname)
-{
- dev_t dev;
-
- if (modif[0] == '\0') {
- db_error("usage: show disk/devicename");
- return;
- }
- dev = getdiskbyname(modif);
- if (dev != NODEV)
- db_printf("dev_t = %p\n", dev);
- else
- db_printf("No disk device matched.\n");
-}
-#endif
OpenPOWER on IntegriCloud