/*	$NetBSD: disks.c,v 1.65 2003/07/25 08:26:21 dsl Exp $ */

/*
 * Copyright 1997 Piermont Information Systems Inc.
 * All rights reserved.
 *
 * Written by Philip A. Nelson for Piermont Information Systems Inc.
 *
 * 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.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed for the NetBSD Project by
 *      Piermont Information Systems Inc.
 * 4. The name of Piermont Information Systems Inc. may not be used to endorse
 *    or promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY PIERMONT INFORMATION SYSTEMS INC. ``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 PIERMONT INFORMATION SYSTEMS INC. 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.
 *
 */

/* disks.c -- routines to deal with finding disks and labeling disks. */


#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <util.h>

#include <sys/param.h>
#include <sys/swap.h>
#include <ufs/ufs/dinode.h>
#include <ufs/ffs/fs.h>
#define FSTYPENAMES
#define static
#include <sys/disklabel.h>
#undef static

#include "defs.h"
#include "md.h"
#include "msg_defs.h"
#include "menu_defs.h"
#include "txtwalk.h"

/* Disk descriptions */
#define MAX_DISKS 15
struct disk_desc {
	char dd_name[SSTRSIZE];
	struct disk_geom {
		int  dg_cyl;
		int  dg_head;
		int  dg_sec;
		int  dg_secsize;
		int  dg_totsec;
	} dg;
};
#define dd_cyl dg.dg_cyl
#define dd_head dg.dg_head
#define dd_sec dg.dg_sec
#define dd_secsize dg.dg_secsize
#define dd_totsec dg.dg_totsec

/* Local prototypes */
static void foundffs(struct data *, size_t);
static int do_fsck(const char *);
static int fsck_root(void);
static int do_flfs_newfs(const char *, int, const char *);
static int fsck_num(const char *);

static int fsck_with_error_menu(const char *);
static int target_mount_with_error_menu(const char *, char *, const char *);

#ifndef DISK_NAMES
#define DISK_NAMES "wd", "sd", "ld"
#endif

static const char *disk_names[] = { DISK_NAMES, "vnd", NULL };

static int
get_disks(struct disk_desc *dd)
{
	const char **xd;
	char d_name[SSTRSIZE];
	struct disklabel l;
	int i;
	int numdisks;

	/* initialize */
	numdisks = 0;

	for (xd = disk_names; *xd != NULL; xd++) {
		for (i = 0; i < MAX_DISKS; i++) {
			snprintf(d_name, sizeof d_name, "%s%d", *xd, i);
			if (!get_geom(d_name, &l)) {
				if (errno == ENOENT)
					break;
				continue;
			}
			strlcpy(dd->dd_name, d_name, sizeof dd->dd_name);
			dd->dd_cyl = l.d_ncylinders;
			dd->dd_head = l.d_ntracks;
			dd->dd_sec = l.d_nsectors;
			dd->dd_secsize = l.d_secsize;
			dd->dd_totsec = l.d_secperunit;
			dd++;
			numdisks++;
			if (numdisks >= MAX_DISKS)
				return numdisks;
		}
	}
	return numdisks;
}

static int
set_dsk_select(menudesc *m, menu_ent *opt, void *arg)
{
	*(int *)arg = m->cursel;
	return 1;
}

int
find_disks(const char *doingwhat)
{
	struct disk_desc disks[MAX_DISKS];
	menu_ent dsk_menu[nelem(disks)];
	struct disk_desc *disk;
	int i;
	int numdisks;
	int selected_disk = 0;
	int menu_no;

	/* Find disks. */
	numdisks = get_disks(disks);

	/* need a redraw here, kernel messages hose everything */
	touchwin(stdscr);
	refresh();

	if (numdisks == 0) {
		/* No disks found! */
		msg_display(MSG_nodisk);
		process_menu(MENU_ok, NULL);
		/*endwin();*/
		return -1;
	}

	if (numdisks == 1) {
		/* One disk found! */
		msg_display(MSG_onedisk, disks[0].dd_name, doingwhat);
		process_menu(MENU_ok, NULL);
	} else {
		/* Multiple disks found! */
		for (i = 0; i < numdisks; i++) {
			dsk_menu[i].opt_name = disks[i].dd_name;
			dsk_menu[i].opt_menu = OPT_NOMENU;
			dsk_menu[i].opt_flags = OPT_EXIT;
			dsk_menu[i].opt_action = set_dsk_select;
		}
		menu_no = new_menu(MSG_Available_disks,
			dsk_menu, numdisks, -1, 4, 0, 0,
			MC_SCROLL | MC_NOEXITOPT,
			NULL, NULL, NULL, NULL, NULL);
		if (menu_no == -1)
			return -1;
		msg_display(MSG_ask_disk);
		process_menu(menu_no, &selected_disk);
		free_menu(menu_no);
	}

	disk = disks + selected_disk;
	strlcpy(diskdev, disk->dd_name, sizeof diskdev);

	sectorsize = disk->dd_secsize;
	dlcyl = disk->dd_cyl;
	dlhead = disk->dd_head;
	dlsec = disk->dd_sec;
	dlsize = disk->dd_totsec;
	if (dlsize == 0)
		dlsize = disk->dd_cyl * disk->dd_head * disk->dd_sec;
	dlcylsize = dlhead * dlsec;

	/* Get existing/default label */
	incorelabel(diskdev, oldlabel);

	return numdisks;
}

void
fmt_fspart(menudesc *m, int ptn, void *arg)
{
	int poffset, psize, pend;
	const char *desc;
	static const char *Yes, *No;

	if (Yes == NULL) {
		Yes = msg_string(MSG_Yes);
		No = msg_string(MSG_No);
	}

	poffset = bsdlabel[ptn].pi_offset / sizemult;
	psize = bsdlabel[ptn].pi_size / sizemult;
	if (psize == 0)
		pend = 0;
	else
		pend = (bsdlabel[ptn].pi_offset +
			bsdlabel[ptn].pi_size) / sizemult - 1;

	desc = fstypenames[bsdlabel[ptn].pi_fstype];
#ifdef PART_BOOT
	if (ptn == PART_BOOT)
		desc = msg_string(MSG_Boot_partition_cant_change);
#endif
	if (ptn == getrawpartition())
		desc = msg_string(MSG_Whole_disk_cant_change);
	else {
		if (ptn == C)
			desc = msg_string(MSG_NetBSD_partition_cant_change);
	}

	wprintw(m->mw, msg_string(MSG_fspart_row),
			poffset, pend, psize, desc,
			PI_ISBSDFS(&bsdlabel[ptn]) ?
			    bsdlabel[ptn].pi_flags & PIF_NEWFS ? Yes : No : "",
			bsdlabel[ptn].pi_mount[0] == '/' ?
			    bsdlabel[ptn].pi_flags & PIF_MOUNT ? Yes : No : "",
			bsdlabel[ptn].pi_mount);
}

/*
 * Label a disk using an MD-specific string DISKLABEL_CMD for
 * to invoke disklabel.
 * if MD code does not define DISKLABEL_CMD, this is a no-op.
 *
 * i386 port uses "/sbin/disklabel -w -r", just like i386
 * miniroot scripts, though this may leave a bogus incore label.
 *
 * Sun ports should use DISKLABEL_CMD "/sbin/disklabel -w"
 * to get incore to ondisk inode translation for the Sun proms.
 */
int
write_disklabel (void)
{

#ifdef DISKLABEL_CMD
	/* disklabel the disk */
	return run_prog(RUN_DISPLAY, MSG_cmdfail,
	    "%s %s %s", DISKLABEL_CMD, diskdev, bsddiskname);
#else
	return 0;
#endif
}


static int
ptn_sort(const void *a, const void *b)
{
	return strcmp(bsdlabel[*(const int *)a].pi_mount,
		      bsdlabel[*(const int *)b].pi_mount);
}

int
make_filesystems(void)
{
	int i;
	int ptn;
	int ptn_order[nelem(bsdlabel)];
	char partname[STRSIZE];
	int error;
	int maxpart = getmaxpartitions();

	if (maxpart > nelem(bsdlabel))
		maxpart = nelem(bsdlabel);

	/* Making new file systems and mounting them */

	/* sort to ensure /usr/local is mounted after /usr (etc) */
	for (i = 0; i < maxpart; i++)
		ptn_order[i] = i;
	qsort(ptn_order, maxpart, sizeof ptn_order[0], ptn_sort);

	for (i = 0; i < maxpart; i++) {
		/*
		 * newfs and mount. For now, process only BSD filesystems.
		 * but if this is the mounted-on root, has no mount
		 * point defined, or is marked preserve, don't touch it!
		 */
		ptn = ptn_order[i];
	  	snprintf(partname, STRSIZE, "%s%c", diskdev, 'a' + ptn);
		if (!PI_ISBSDFS(&bsdlabel[ptn]) || is_active_rootpart(partname))
			continue;
		error = do_flfs_newfs(partname, ptn, bsdlabel[ptn].pi_mount);
		if (error)
			return error;
	}
	return 0;
}

/* newfs and mount an ffs filesystem. */
static int
do_flfs_newfs(const char *partname, int partno, const char *mountpoint)
{
	char dev_name[STRSIZE];
	int error;
	const char *newfs;

	if (!*mountpoint)
		return 0;

	if (bsdlabel[partno].pi_flags & PIF_NEWFS) {
		switch (bsdlabel[partno].pi_fstype) {
		case FS_BSDFFS:
			newfs = "/sbin/newfs";
			break;
		case FS_BSDLFS:
			newfs = "/sbin/newfs_lfs";
			break;
		default:
			return 0;
		}
		error = run_prog(RUN_DISPLAY, MSG_cmdfail, "%s /dev/r%s",
		    newfs, partname);
	} else
		error = 0;

	if (error == 0 && bsdlabel[partno].pi_flags & PIF_MOUNT) {
		snprintf(dev_name, sizeof(dev_name), "/dev/%s", partname);
		make_target_dir(mountpoint);
		error = target_mount(bsdlabel[partno].pi_fstype == FS_BSDFFS ?
		    "-v -o async" : "-v", dev_name, mountpoint);
		if (error) {
			msg_display(MSG_mountfail, dev_name, mountpoint);
			process_menu(MENU_ok, NULL);
		}
	}
	return error;
}

int
make_fstab(void)
{
	FILE *f;
	int i, swap_dev = -1;

	/* Create the fstab. */
	make_target_dir("/etc");
	f = target_fopen("/etc/fstab", "w");
	if (logging)
		(void)fprintf(logfp,
		    "Creating %s/etc/fstab.\n", target_prefix());
	scripting_fprintf(NULL, "cat <<EOF >%s/etc/fstab\n", target_prefix());

	if (f == NULL) {
#ifndef DEBUG
		msg_display(MSG_createfstab);
		if (logging)
			(void)fprintf(logfp, "Failed to make /etc/fstab!\n");
		process_menu(MENU_ok, NULL);
		return 1;
#else
		f = stdout;
#endif
	}

	for (i = 0; i < getmaxpartitions(); i++) {
		const char *s = "";
		const char *mp = bsdlabel[i].pi_mount;
		const char *fstype = "ffs";

		if (!*mp) {
			/*
			 * No mount point specified, comment out line and
			 * use /mnt as a placeholder for the mount point.
			 */
			s = "# ";
			mp = "/mnt";
		}

		switch (bsdlabel[i].pi_fstype) {
		case FS_BSDLFS:
			/* If there is no LFS, just comment it out. */
			if (check_lfs_progs())
				s = "# ";
			fstype = "lfs";
			/* FALLTHROUGH */
		case FS_BSDFFS:
			scripting_fprintf(f, "%s/dev/%s%c %s %s rw 1 %d\n",
			       s, diskdev, 'a' + i, mp, fstype, fsck_num(mp));
			break;
		case FS_MSDOS:
			scripting_fprintf(f, "%s/dev/%s%c %s msdos rw 0 0\n",
			       s, diskdev, 'a' + i, mp);
			break;
		case FS_SWAP:
			if (swap_dev == -1)
				swap_dev = i;
			scripting_fprintf(f, "/dev/%s%c none swap sw 0 0\n",
				diskdev, 'a' + i);
			break;
		}
	}

	if (tmp_mfs_size != 0) {
		if (swap_dev != -1)
			scripting_fprintf(f, "/dev/%s%c /tmp mfs rw,-s=%d\n",
				diskdev, 'a' + swap_dev, tmp_mfs_size);
		else
			scripting_fprintf(f, "swap /tmp mfs rw,-s=%d\n,
				tmp_mfs_size");
	}

	/* Add /kern to fstab and make mountpoint. */
	scripting_fprintf(script, "/kern /kern kernfs rw\n");
	make_target_dir("/kern");

	scripting_fprintf(NULL, "EOF\n");

#ifndef DEBUG
	fclose(f);
	fflush(NULL);
#endif
	return 0;
}

/* Return the appropriate fs_passno field, as specified by fstab(5) */
static int
fsck_num(const char *mp)
{
	return (strcmp(mp, "/") == 0) ? 1 : 2;
}


/* Get information on the file systems mounted from the root filesystem.
 * Offer to convert them into 4.4BSD inodes if they are not 4.4BSD
 * inodes.  Fsck them.  Mount them.
 */


static struct lookfor fstabbuf[] = {
	{"/dev/", "/dev/%s %s ffs %s", "c", NULL, 0, 0, foundffs},
	{"/dev/", "/dev/%s %s ufs %s", "c", NULL, 0, 0, foundffs},
};
static size_t numfstabbuf = sizeof(fstabbuf) / sizeof(struct lookfor);

#define MAXDEVS 40

static char dev[MAXDEVS][SSTRSIZE];
static char mnt[MAXDEVS][STRSIZE];
static int  devcnt = 0;

static void
/*ARGSUSED*/
foundffs(struct data *list, size_t num)
{
	if (strcmp(list[1].u.s_val, "/") != 0 &&
	    strstr(list[2].u.s_val, "noauto") == NULL) {
		strncpy(dev[devcnt], list[0].u.s_val, SSTRSIZE);
		strncpy(mnt[devcnt], list[1].u.s_val, STRSIZE);
		devcnt++;
	}
}

/*
 * Run a check on the specified filesystem.
 */
static int
do_fsck(const char *diskpart)
{
	char rraw[SSTRSIZE];
	const char *prog = "/sbin/fsck";
	int err;

	/* cons up raw partition name. */
	snprintf (rraw, sizeof(rraw), "/dev/r%s", diskpart);

#ifndef	DEBUG_SETS
	err = run_prog(RUN_DISPLAY, NULL, "%s %s", prog, rraw);
#else
	err = run_prog(RUN_DISPLAY, NULL, "%s -f %s", prog, rraw);
#endif
	wrefresh(stdscr);
	return err;
}

/*
 * Do an fsck. On failure,  inform the user by showing a warning
 * message and doing menu_ok() before proceeding.
 * acknowledge the warning before continuing.
 * Returns 0 on success, or nonzero return code from do_fsck() on failure.
 */
int
fsck_with_error_menu(const char *diskpart)
{
	int error;

	if ((error = do_fsck(diskpart)) != 0) {
#ifdef DEBUG
		fprintf(stderr, "sysinst: do_fsck() returned err %d\n", error);
#endif
		msg_display(MSG_badfs, diskpart, "", error);
		process_menu(MENU_ok, NULL);
	}
	return error;
}


/*
 * Do target_mount, but print a message and do menu_ok() before
 * proceeding, to inform the user.
 * returns 0 if the mount completed without indicating errors,
 * and an nonzero error code from target_mount() otherwise.
 */
int
target_mount_with_error_menu(const char *opt,
		 char *diskpart, const char *mntpoint)
{
	int error;
	char dev_name[STRSIZE];

	snprintf(dev_name, sizeof(dev_name), "/dev/%s", diskpart);
#ifdef DEBUG
	fprintf(stderr, "sysinst: mount_with_error_menu: %s %s %s\n",
		opt, dev_name, mntpoint);
#endif

	if ((error = target_mount(opt, dev_name, mntpoint)) != 0) {
		msg_display (MSG_badmount, dev_name, "");
		process_menu (MENU_ok, NULL);
		return error;
	} else {
#ifdef DEBUG
		printf("mount %s %s %s OK\n", opt, diskpart, mntpoint);
#endif
	}

	return error;
}

/*
 * fsck and mount the root partition.
 */
int
fsck_root(void)
{
	int	error;
	char	rootdev[STRSIZE];

	/* cons up the root name: partition 'a' on the target diskdev.*/
	snprintf(rootdev, STRSIZE, "%s%c", diskdev, 'a' + rootpart);
#ifdef DEBUG
	printf("fsck_root: rootdev is %s\n", rootdev);
#endif
	error = fsck_with_error_menu(rootdev);
	if (error != 0)
		return error;

	if (target_already_root()) {
		return (0);
	}

	/* Mount /dev/<diskdev>a on target's "".
	 * If we pass "" as mount-on, Prefixing will DTRT.
	 * for now, use no options.
	 * XXX consider -o remount in case target root is
	 * current root, still readonly from single-user?
	 */
	error = target_mount_with_error_menu("", rootdev, "");

#ifdef DEBUG
	printf("fsck_root: mount of %s returns %d\n", rootdev, error);
#endif
	return (error);
}

int
fsck_disks(void)
{
	char *fstab;
	int   fstabsize;
	int   i;
	int   error;

	/* First the root device. */
	if (!target_already_root()) {
		error = fsck_root();
		if (error != 0 && error != EBUSY)
			return 0;
	}

	/* Check the target /etc/fstab exists before trying to parse it. */
	if (target_dir_exists_p("/etc") == 0 ||
	    target_file_exists_p("/etc/fstab") == 0) {
		msg_display(MSG_noetcfstab, diskdev);
		process_menu(MENU_ok, NULL);
		return 0;
	}


	/* Get fstab entries from the target-root /etc/fstab. */
	fstabsize = target_collect_file(T_FILE, &fstab, "/etc/fstab");
	if (fstabsize < 0) {
		/* error ! */
		msg_display(MSG_badetcfstab, diskdev);
		process_menu(MENU_ok, NULL);
		return 0;
	}
	walk(fstab, (size_t)fstabsize, fstabbuf, numfstabbuf);
	free(fstab);

	for (i = 0; i < devcnt; i++) {
		if (fsck_with_error_menu(dev[i]))
			return 0;

#ifdef DEBUG
		printf("sysinst: mount %s\n", dev[i]);
#endif
		if (target_mount_with_error_menu("", dev[i], mnt[i]) != 0)
			return 0;
	}

	return 1;
}

int
set_swap(const char *disk, partinfo *pp)
{
	int i;
	char *cp;
	int rval;

	if (pp == NULL)
		pp = oldlabel;

	for (i = 0; i < MAXPARTITIONS; i++) {
		if (pp[i].pi_fstype != FS_SWAP)
			continue;
		asprintf(&cp, "/dev/%s%c", disk, 'a' + i);
		rval = swapctl(SWAP_ON, cp, 0);
		free(cp);
		if (rval != 0)
			return -1;
	}

	return 0;
}

int
check_swap(const char *disk, int remove_swap)
{
	struct swapent *swap;
	char *cp;
	int nswap;
	int l;
	int rval = 0;

	nswap = swapctl(SWAP_NSWAP, 0, 0);
	if (nswap <= 0)
		return 0;

	swap = malloc(nswap * sizeof *swap);
	if (swap == NULL)
		return -1;

	nswap = swapctl(SWAP_STATS, swap, nswap);
	if (nswap < 0)
		goto bad_swap;

	l = strlen(disk);
	while (--nswap >= 0) {
		/* Should we check the se_dev or se_path? */
		cp = swap[nswap].se_path;
		if (memcmp(cp, "/dev/", 5) != 0)
			continue;
		if (memcmp(cp + 5, disk, l) != 0)
			continue;
		if (!isalpha(*(unsigned char *)(cp + 5 + l)))
			continue;
		if (cp[5 + l + 1] != 0)
			continue;
		/* ok path looks like it is for this device */
		if (!remove_swap) {
			/* count active swap areas */
			rval++;
			continue;
		}
		if (swapctl(SWAP_OFF, cp, 0) == -1)
			rval = -1;
	}

    done:
	free(swap);
	return rval;

    bad_swap:
	rval = -1;
	goto done;
}