super.c 40.5 KB
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/*
 *  linux/fs/ufs/super.c
 *
 * Copyright (C) 1998
 * Daniel Pirkl <daniel.pirkl@email.cz>
 * Charles University, Faculty of Mathematics and Physics
 */

/* Derived from
 *
 *  linux/fs/ext2/super.c
 *
 * Copyright (C) 1992, 1993, 1994, 1995
 * Remy Card (card@masi.ibp.fr)
 * Laboratoire MASI - Institut Blaise Pascal
 * Universite Pierre et Marie Curie (Paris VI)
 *
 *  from
 *
 *  linux/fs/minix/inode.c
 *
 *  Copyright (C) 1991, 1992  Linus Torvalds
 *
 *  Big-endian to little-endian byte-swapping/bitmaps by
 *        David S. Miller (davem@caip.rutgers.edu), 1995
 */
 
/*
 * Inspired by
 *
 *  linux/fs/ufs/super.c
 *
 * Copyright (C) 1996
 * Adrian Rodriguez (adrian@franklins-tower.rutgers.edu)
 * Laboratory for Computer Science Research Computing Facility
 * Rutgers, The State University of New Jersey
 *
 * Copyright (C) 1996  Eddie C. Dost  (ecd@skynet.be)
 *
 * Kernel module support added on 96/04/26 by
 * Stefan Reinauer <stepan@home.culture.mipt.ru>
 *
 * Module usage counts added on 96/04/29 by
 * Gertjan van Wingerde <gertjan@cs.vu.nl>
 *
 * Clean swab support on 19970406 by
 * Francois-Rene Rideau <fare@tunes.org>
 *
 * 4.4BSD (FreeBSD) support added on February 1st 1998 by
 * Niels Kristian Bech Jensen <nkbj@image.dk> partially based
 * on code by Martin von Loewis <martin@mira.isdn.cs.tu-berlin.de>.
 *
 * NeXTstep support added on February 5th 1998 by
 * Niels Kristian Bech Jensen <nkbj@image.dk>.
 *
 * write support Daniel Pirkl <daniel.pirkl@email.cz> 1998
 * 
 * HP/UX hfs filesystem support added by
 * Martin K. Petersen <mkp@mkp.net>, August 1999
 *
 * UFS2 (of FreeBSD 5.x) support added by
 * Niraj Kumar <niraj17@iitbombay.org>, Jan 2004
 *
 */


#include <linux/module.h>
#include <linux/bitops.h>

#include <stdarg.h>

#include <asm/uaccess.h>
#include <asm/system.h>

#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/ufs_fs.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/parser.h>
#include <linux/smp_lock.h>
#include <linux/buffer_head.h>
#include <linux/vfs.h>

#include "swab.h"
#include "util.h"

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#ifdef CONFIG_UFS_DEBUG
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/*
 * Print contents of ufs_super_block, useful for debugging
 */
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static void ufs_print_super_stuff(struct super_block *sb, unsigned flags,
				  struct ufs_super_block_first *usb1,
				  struct ufs_super_block_second *usb2,
				  struct ufs_super_block_third *usb3)
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{
	printk("ufs_print_super_stuff\n");
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	printk("  magic:     0x%x\n", fs32_to_cpu(sb, usb3->fs_magic));
	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
		printk("  fs_size:   %llu\n", (unsigned long long)
		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size));
		printk("  fs_dsize:  %llu\n", (unsigned long long)
		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize));
		printk("  bsize:         %u\n",
		       fs32_to_cpu(sb, usb1->fs_bsize));
		printk("  fsize:         %u\n",
		       fs32_to_cpu(sb, usb1->fs_fsize));
		printk("  fs_volname:  %s\n", usb2->fs_un.fs_u2.fs_volname);
		printk("  fs_sblockloc: %llu\n", (unsigned long long)
		       fs64_to_cpu(sb, usb2->fs_un.fs_u2.fs_sblockloc));
		printk("  cs_ndir(No of dirs):  %llu\n", (unsigned long long)
		       fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir));
		printk("  cs_nbfree(No of free blocks):  %llu\n",
		       (unsigned long long)
		       fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree));
	} else {
		printk(" sblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_sblkno));
		printk(" cblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_cblkno));
		printk(" iblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_iblkno));
		printk(" dblkno:      %u\n", fs32_to_cpu(sb, usb1->fs_dblkno));
		printk(" cgoffset:    %u\n",
		       fs32_to_cpu(sb, usb1->fs_cgoffset));
		printk(" ~cgmask:     0x%x\n",
		       ~fs32_to_cpu(sb, usb1->fs_cgmask));
		printk(" size:        %u\n", fs32_to_cpu(sb, usb1->fs_size));
		printk(" dsize:       %u\n", fs32_to_cpu(sb, usb1->fs_dsize));
		printk(" ncg:         %u\n", fs32_to_cpu(sb, usb1->fs_ncg));
		printk(" bsize:       %u\n", fs32_to_cpu(sb, usb1->fs_bsize));
		printk(" fsize:       %u\n", fs32_to_cpu(sb, usb1->fs_fsize));
		printk(" frag:        %u\n", fs32_to_cpu(sb, usb1->fs_frag));
		printk(" fragshift:   %u\n",
		       fs32_to_cpu(sb, usb1->fs_fragshift));
		printk(" ~fmask:      %u\n", ~fs32_to_cpu(sb, usb1->fs_fmask));
		printk(" fshift:      %u\n", fs32_to_cpu(sb, usb1->fs_fshift));
		printk(" sbsize:      %u\n", fs32_to_cpu(sb, usb1->fs_sbsize));
		printk(" spc:         %u\n", fs32_to_cpu(sb, usb1->fs_spc));
		printk(" cpg:         %u\n", fs32_to_cpu(sb, usb1->fs_cpg));
		printk(" ipg:         %u\n", fs32_to_cpu(sb, usb1->fs_ipg));
		printk(" fpg:         %u\n", fs32_to_cpu(sb, usb1->fs_fpg));
		printk(" csaddr:      %u\n", fs32_to_cpu(sb, usb1->fs_csaddr));
		printk(" cssize:      %u\n", fs32_to_cpu(sb, usb1->fs_cssize));
		printk(" cgsize:      %u\n", fs32_to_cpu(sb, usb1->fs_cgsize));
		printk(" fstodb:      %u\n",
		       fs32_to_cpu(sb, usb1->fs_fsbtodb));
		printk(" nrpos:       %u\n", fs32_to_cpu(sb, usb3->fs_nrpos));
		printk(" ndir         %u\n",
		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir));
		printk(" nifree       %u\n",
		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree));
		printk(" nbfree       %u\n",
		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree));
		printk(" nffree       %u\n",
		       fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree));
	}
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	printk("\n");
}

/*
 * Print contents of ufs_cylinder_group, useful for debugging
 */
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static void ufs_print_cylinder_stuff(struct super_block *sb,
				     struct ufs_cylinder_group *cg)
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{
	printk("\nufs_print_cylinder_stuff\n");
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	printk("size of ucg: %zu\n", sizeof(struct ufs_cylinder_group));
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	printk("  magic:        %x\n", fs32_to_cpu(sb, cg->cg_magic));
	printk("  time:         %u\n", fs32_to_cpu(sb, cg->cg_time));
	printk("  cgx:          %u\n", fs32_to_cpu(sb, cg->cg_cgx));
	printk("  ncyl:         %u\n", fs16_to_cpu(sb, cg->cg_ncyl));
	printk("  niblk:        %u\n", fs16_to_cpu(sb, cg->cg_niblk));
	printk("  ndblk:        %u\n", fs32_to_cpu(sb, cg->cg_ndblk));
	printk("  cs_ndir:      %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_ndir));
	printk("  cs_nbfree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nbfree));
	printk("  cs_nifree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nifree));
	printk("  cs_nffree:    %u\n", fs32_to_cpu(sb, cg->cg_cs.cs_nffree));
	printk("  rotor:        %u\n", fs32_to_cpu(sb, cg->cg_rotor));
	printk("  frotor:       %u\n", fs32_to_cpu(sb, cg->cg_frotor));
	printk("  irotor:       %u\n", fs32_to_cpu(sb, cg->cg_irotor));
	printk("  frsum:        %u, %u, %u, %u, %u, %u, %u, %u\n",
	    fs32_to_cpu(sb, cg->cg_frsum[0]), fs32_to_cpu(sb, cg->cg_frsum[1]),
	    fs32_to_cpu(sb, cg->cg_frsum[2]), fs32_to_cpu(sb, cg->cg_frsum[3]),
	    fs32_to_cpu(sb, cg->cg_frsum[4]), fs32_to_cpu(sb, cg->cg_frsum[5]),
	    fs32_to_cpu(sb, cg->cg_frsum[6]), fs32_to_cpu(sb, cg->cg_frsum[7]));
	printk("  btotoff:      %u\n", fs32_to_cpu(sb, cg->cg_btotoff));
	printk("  boff:         %u\n", fs32_to_cpu(sb, cg->cg_boff));
	printk("  iuseoff:      %u\n", fs32_to_cpu(sb, cg->cg_iusedoff));
	printk("  freeoff:      %u\n", fs32_to_cpu(sb, cg->cg_freeoff));
	printk("  nextfreeoff:  %u\n", fs32_to_cpu(sb, cg->cg_nextfreeoff));
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	printk("  clustersumoff %u\n",
	       fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clustersumoff));
	printk("  clusteroff    %u\n",
	       fs32_to_cpu(sb, cg->cg_u.cg_44.cg_clusteroff));
	printk("  nclusterblks  %u\n",
	       fs32_to_cpu(sb, cg->cg_u.cg_44.cg_nclusterblks));
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	printk("\n");
}
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#else
#  define ufs_print_super_stuff(sb, flags, usb1, usb2, usb3) /**/
#  define ufs_print_cylinder_stuff(sb, cg) /**/
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#endif /* CONFIG_UFS_DEBUG */
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static struct super_operations ufs_super_ops;

static char error_buf[1024];

void ufs_error (struct super_block * sb, const char * function,
	const char * fmt, ...)
{
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	va_list args;

	uspi = UFS_SB(sb)->s_uspi;
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	usb1 = ubh_get_usb_first(uspi);
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	if (!(sb->s_flags & MS_RDONLY)) {
		usb1->fs_clean = UFS_FSBAD;
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		ubh_mark_buffer_dirty(USPI_UBH(uspi));
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		sb->s_dirt = 1;
		sb->s_flags |= MS_RDONLY;
	}
	va_start (args, fmt);
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	vsnprintf (error_buf, sizeof(error_buf), fmt, args);
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	va_end (args);
	switch (UFS_SB(sb)->s_mount_opt & UFS_MOUNT_ONERROR) {
	case UFS_MOUNT_ONERROR_PANIC:
		panic ("UFS-fs panic (device %s): %s: %s\n", 
			sb->s_id, function, error_buf);

	case UFS_MOUNT_ONERROR_LOCK:
	case UFS_MOUNT_ONERROR_UMOUNT:
	case UFS_MOUNT_ONERROR_REPAIR:
		printk (KERN_CRIT "UFS-fs error (device %s): %s: %s\n",
			sb->s_id, function, error_buf);
	}		
}

void ufs_panic (struct super_block * sb, const char * function,
	const char * fmt, ...)
{
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	va_list args;
	
	uspi = UFS_SB(sb)->s_uspi;
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	usb1 = ubh_get_usb_first(uspi);
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	if (!(sb->s_flags & MS_RDONLY)) {
		usb1->fs_clean = UFS_FSBAD;
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		ubh_mark_buffer_dirty(USPI_UBH(uspi));
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		sb->s_dirt = 1;
	}
	va_start (args, fmt);
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	vsnprintf (error_buf, sizeof(error_buf), fmt, args);
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	va_end (args);
	sb->s_flags |= MS_RDONLY;
	printk (KERN_CRIT "UFS-fs panic (device %s): %s: %s\n",
		sb->s_id, function, error_buf);
}

void ufs_warning (struct super_block * sb, const char * function,
	const char * fmt, ...)
{
	va_list args;

	va_start (args, fmt);
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	vsnprintf (error_buf, sizeof(error_buf), fmt, args);
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	va_end (args);
	printk (KERN_WARNING "UFS-fs warning (device %s): %s: %s\n",
		sb->s_id, function, error_buf);
}

enum {
	Opt_type_old, Opt_type_sunx86, Opt_type_sun, Opt_type_44bsd,
	Opt_type_ufs2, Opt_type_hp, Opt_type_nextstepcd, Opt_type_nextstep,
	Opt_type_openstep, Opt_onerror_panic, Opt_onerror_lock,
	Opt_onerror_umount, Opt_onerror_repair, Opt_err
};

static match_table_t tokens = {
	{Opt_type_old, "ufstype=old"},
	{Opt_type_sunx86, "ufstype=sunx86"},
	{Opt_type_sun, "ufstype=sun"},
	{Opt_type_44bsd, "ufstype=44bsd"},
	{Opt_type_ufs2, "ufstype=ufs2"},
	{Opt_type_ufs2, "ufstype=5xbsd"},
	{Opt_type_hp, "ufstype=hp"},
	{Opt_type_nextstepcd, "ufstype=nextstep-cd"},
	{Opt_type_nextstep, "ufstype=nextstep"},
	{Opt_type_openstep, "ufstype=openstep"},
	{Opt_onerror_panic, "onerror=panic"},
	{Opt_onerror_lock, "onerror=lock"},
	{Opt_onerror_umount, "onerror=umount"},
	{Opt_onerror_repair, "onerror=repair"},
	{Opt_err, NULL}
};

static int ufs_parse_options (char * options, unsigned * mount_options)
{
	char * p;
	
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	UFSD("ENTER\n");
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	if (!options)
		return 1;

	while ((p = strsep(&options, ",")) != NULL) {
		substring_t args[MAX_OPT_ARGS];
		int token;
		if (!*p)
			continue;

		token = match_token(p, tokens, args);
		switch (token) {
		case Opt_type_old:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_OLD);
			break;
		case Opt_type_sunx86:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
			break;
		case Opt_type_sun:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_SUN);
			break;
		case Opt_type_44bsd:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_44BSD);
			break;
		case Opt_type_ufs2:
			ufs_clear_opt(*mount_options, UFSTYPE);
			ufs_set_opt(*mount_options, UFSTYPE_UFS2);
			break;
		case Opt_type_hp:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_HP);
			break;
		case Opt_type_nextstepcd:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
			break;
		case Opt_type_nextstep:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
			break;
		case Opt_type_openstep:
			ufs_clear_opt (*mount_options, UFSTYPE);
			ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
			break;
		case Opt_onerror_panic:
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_PANIC);
			break;
		case Opt_onerror_lock:
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_LOCK);
			break;
		case Opt_onerror_umount:
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_UMOUNT);
			break;
		case Opt_onerror_repair:
			printk("UFS-fs: Unable to do repair on error, "
				"will lock lock instead\n");
			ufs_clear_opt (*mount_options, ONERROR);
			ufs_set_opt (*mount_options, ONERROR_REPAIR);
			break;
		default:
			printk("UFS-fs: Invalid option: \"%s\" "
					"or missing value\n", p);
			return 0;
		}
	}
	return 1;
}

/*
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 * Diffrent types of UFS hold fs_cstotal in different
 * places, and use diffrent data structure for it.
 * To make things simplier we just copy fs_cstotal to ufs_sb_private_info
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 */
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static void ufs_setup_cstotal(struct super_block *sb)
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{
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	struct ufs_sb_info *sbi = UFS_SB(sb);
	struct ufs_sb_private_info *uspi = sbi->s_uspi;
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	struct ufs_super_block_first *usb1;
	struct ufs_super_block_second *usb2;
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	struct ufs_super_block_third *usb3;
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	unsigned mtype = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;

	UFSD("ENTER, mtype=%u\n", mtype);
	usb1 = ubh_get_usb_first(uspi);
	usb2 = ubh_get_usb_second(uspi);
	usb3 = ubh_get_usb_third(uspi);

	if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
	     (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
	    mtype == UFS_MOUNT_UFSTYPE_UFS2) {
		/*we have statistic in different place, then usual*/
		uspi->cs_total.cs_ndir = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_ndir);
		uspi->cs_total.cs_nbfree = fs64_to_cpu(sb, usb2->fs_un.fs_u2.cs_nbfree);
		uspi->cs_total.cs_nifree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree);
		uspi->cs_total.cs_nffree = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree);
	} else {
		uspi->cs_total.cs_ndir = fs32_to_cpu(sb, usb1->fs_cstotal.cs_ndir);
		uspi->cs_total.cs_nbfree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nbfree);
		uspi->cs_total.cs_nifree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nifree);
		uspi->cs_total.cs_nffree = fs32_to_cpu(sb, usb1->fs_cstotal.cs_nffree);
	}
	UFSD("EXIT\n");
}

/*
 * Read on-disk structures associated with cylinder groups
 */
static int ufs_read_cylinder_structures(struct super_block *sb)
{
	struct ufs_sb_info *sbi = UFS_SB(sb);
	struct ufs_sb_private_info *uspi = sbi->s_uspi;
	unsigned flags = sbi->s_flags;
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	struct ufs_buffer_head * ubh;
	unsigned char * base, * space;
	unsigned size, blks, i;
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	struct ufs_super_block_third *usb3;

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	UFSD("ENTER\n");
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	usb3 = ubh_get_usb_third(uspi);
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	/*
	 * Read cs structures from (usually) first data block
	 * on the device. 
	 */
	size = uspi->s_cssize;
	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
	base = space = kmalloc(size, GFP_KERNEL);
	if (!base)
		goto failed; 
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	sbi->s_csp = (struct ufs_csum *)space;
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	for (i = 0; i < blks; i += uspi->s_fpb) {
		size = uspi->s_bsize;
		if (i + uspi->s_fpb > blks)
			size = (blks - i) * uspi->s_fsize;

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		if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) 
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			ubh = ubh_bread(sb,
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				fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr) + i, size);
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		else 
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			ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
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		if (!ubh)
			goto failed;

		ubh_ubhcpymem (space, ubh, size);

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		space += size;
		ubh_brelse (ubh);
		ubh = NULL;
	}

	/*
	 * Read cylinder group (we read only first fragment from block
	 * at this time) and prepare internal data structures for cg caching.
	 */
	if (!(sbi->s_ucg = kmalloc (sizeof(struct buffer_head *) * uspi->s_ncg, GFP_KERNEL)))
		goto failed;
	for (i = 0; i < uspi->s_ncg; i++) 
		sbi->s_ucg[i] = NULL;
	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
		sbi->s_ucpi[i] = NULL;
		sbi->s_cgno[i] = UFS_CGNO_EMPTY;
	}
	for (i = 0; i < uspi->s_ncg; i++) {
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		UFSD("read cg %u\n", i);
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		if (!(sbi->s_ucg[i] = sb_bread(sb, ufs_cgcmin(i))))
			goto failed;
		if (!ufs_cg_chkmagic (sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data))
			goto failed;
483

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		ufs_print_cylinder_stuff(sb, (struct ufs_cylinder_group *) sbi->s_ucg[i]->b_data);
	}
	for (i = 0; i < UFS_MAX_GROUP_LOADED; i++) {
		if (!(sbi->s_ucpi[i] = kmalloc (sizeof(struct ufs_cg_private_info), GFP_KERNEL)))
			goto failed;
		sbi->s_cgno[i] = UFS_CGNO_EMPTY;
	}
	sbi->s_cg_loaded = 0;
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	UFSD("EXIT\n");
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	return 1;

failed:
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	kfree (base);
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	if (sbi->s_ucg) {
		for (i = 0; i < uspi->s_ncg; i++)
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			if (sbi->s_ucg[i])
				brelse (sbi->s_ucg[i]);
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		kfree (sbi->s_ucg);
		for (i = 0; i < UFS_MAX_GROUP_LOADED; i++)
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			kfree (sbi->s_ucpi[i]);
L
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	}
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	UFSD("EXIT (FAILED)\n");
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	return 0;
}

/*
510
 * Sync our internal copy of fs_cstotal with disk
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 */
512
static void ufs_put_cstotal(struct super_block *sb)
513
{
514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560
	unsigned mtype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
	struct ufs_sb_private_info *uspi = UFS_SB(sb)->s_uspi;
	struct ufs_super_block_first *usb1;
	struct ufs_super_block_second *usb2;
	struct ufs_super_block_third *usb3;

	UFSD("ENTER\n");
	usb1 = ubh_get_usb_first(uspi);
	usb2 = ubh_get_usb_second(uspi);
	usb3 = ubh_get_usb_third(uspi);

	if ((mtype == UFS_MOUNT_UFSTYPE_44BSD &&
	     (usb1->fs_flags & UFS_FLAGS_UPDATED)) ||
	    mtype == UFS_MOUNT_UFSTYPE_UFS2) {
		/*we have statistic in different place, then usual*/
		usb2->fs_un.fs_u2.cs_ndir =
			cpu_to_fs64(sb, uspi->cs_total.cs_ndir);
		usb2->fs_un.fs_u2.cs_nbfree =
			cpu_to_fs64(sb, uspi->cs_total.cs_nbfree);
		usb3->fs_un1.fs_u2.cs_nifree =
			cpu_to_fs64(sb, uspi->cs_total.cs_nifree);
		usb3->fs_un1.fs_u2.cs_nffree =
			cpu_to_fs64(sb, uspi->cs_total.cs_nffree);
	} else {
		usb1->fs_cstotal.cs_ndir =
			cpu_to_fs32(sb, uspi->cs_total.cs_ndir);
		usb1->fs_cstotal.cs_nbfree =
			cpu_to_fs32(sb, uspi->cs_total.cs_nbfree);
		usb1->fs_cstotal.cs_nifree =
			cpu_to_fs32(sb, uspi->cs_total.cs_nifree);
		usb1->fs_cstotal.cs_nffree =
			cpu_to_fs32(sb, uspi->cs_total.cs_nffree);
	}
	ubh_mark_buffer_dirty(USPI_UBH(uspi));
	UFSD("EXIT\n");
}

/**
 * ufs_put_super_internal() - put on-disk intrenal structures
 * @sb: pointer to super_block structure
 * Put on-disk structures associated with cylinder groups
 * and write them back to disk, also update cs_total on disk
 */
static void ufs_put_super_internal(struct super_block *sb)
{
	struct ufs_sb_info *sbi = UFS_SB(sb);
	struct ufs_sb_private_info *uspi = sbi->s_uspi;
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	struct ufs_buffer_head * ubh;
	unsigned char * base, * space;
	unsigned blks, size, i;
564

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	UFSD("ENTER\n");
567
	ufs_put_cstotal(sb);
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	size = uspi->s_cssize;
	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
570
	base = space = (char*) sbi->s_csp;
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	for (i = 0; i < blks; i += uspi->s_fpb) {
		size = uspi->s_bsize;
		if (i + uspi->s_fpb > blks)
			size = (blks - i) * uspi->s_fsize;
		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
		ubh_memcpyubh (ubh, space, size);
		space += size;
		ubh_mark_buffer_uptodate (ubh, 1);
		ubh_mark_buffer_dirty (ubh);
		ubh_brelse (ubh);
	}
	for (i = 0; i < sbi->s_cg_loaded; i++) {
		ufs_put_cylinder (sb, i);
		kfree (sbi->s_ucpi[i]);
	}
	for (; i < UFS_MAX_GROUP_LOADED; i++) 
		kfree (sbi->s_ucpi[i]);
	for (i = 0; i < uspi->s_ncg; i++) 
		brelse (sbi->s_ucg[i]);
	kfree (sbi->s_ucg);
	kfree (base);
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	UFSD("EXIT\n");
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}

static int ufs_fill_super(struct super_block *sb, void *data, int silent)
{
	struct ufs_sb_info * sbi;
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_super_block_second * usb2;
	struct ufs_super_block_third * usb3;
	struct ufs_buffer_head * ubh;	
	struct inode *inode;
	unsigned block_size, super_block_size;
	unsigned flags;
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	unsigned super_block_offset;
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	uspi = NULL;
	ubh = NULL;
	flags = 0;
	
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	UFSD("ENTER\n");
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614
	sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
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	if (!sbi)
		goto failed_nomem;
	sb->s_fs_info = sbi;

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	UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
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#ifndef CONFIG_UFS_FS_WRITE
	if (!(sb->s_flags & MS_RDONLY)) {
		printk("ufs was compiled with read-only support, "
		"can't be mounted as read-write\n");
		goto failed;
	}
#endif
	/*
	 * Set default mount options
	 * Parse mount options
	 */
	sbi->s_mount_opt = 0;
	ufs_set_opt (sbi->s_mount_opt, ONERROR_LOCK);
	if (!ufs_parse_options ((char *) data, &sbi->s_mount_opt)) {
		printk("wrong mount options\n");
		goto failed;
	}
	if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
		if (!silent)
			printk("You didn't specify the type of your ufs filesystem\n\n"
			"mount -t ufs -o ufstype="
M
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			"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
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			">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
			"default is ufstype=old\n");
		ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
	}

	sbi->s_uspi = uspi =
		kmalloc (sizeof(struct ufs_sb_private_info), GFP_KERNEL);
	if (!uspi)
		goto failed;
652
	uspi->s_dirblksize = UFS_SECTOR_SIZE;
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	super_block_offset=UFS_SBLOCK;

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	/* Keep 2Gig file limit. Some UFS variants need to override 
	   this but as I don't know which I'll let those in the know loosen
	   the rules */
	switch (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) {
	case UFS_MOUNT_UFSTYPE_44BSD:
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		UFSD("ufstype=44bsd\n");
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		uspi->s_fsize = block_size = 512;
		uspi->s_fmask = ~(512 - 1);
		uspi->s_fshift = 9;
		uspi->s_sbsize = super_block_size = 1536;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		break;
	case UFS_MOUNT_UFSTYPE_UFS2:
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		UFSD("ufstype=ufs2\n");
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		super_block_offset=SBLOCK_UFS2;
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		uspi->s_fsize = block_size = 512;
		uspi->s_fmask = ~(512 - 1);
		uspi->s_fshift = 9;
		uspi->s_sbsize = super_block_size = 1536;
		uspi->s_sbbase =  0;
		flags |= UFS_TYPE_UFS2 | UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		if (!(sb->s_flags & MS_RDONLY)) {
			printk(KERN_INFO "ufstype=ufs2 is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
 		}
		break;
		
	case UFS_MOUNT_UFSTYPE_SUN:
E
Evgeniy Dushistov 已提交
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		UFSD("ufstype=sun\n");
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		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		uspi->s_maxsymlinklen = 56;
		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
		break;

	case UFS_MOUNT_UFSTYPE_SUNx86:
E
Evgeniy Dushistov 已提交
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		UFSD("ufstype=sunx86\n");
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696 697 698 699 700 701 702 703 704 705
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		uspi->s_maxsymlinklen = 56;
		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
		break;

	case UFS_MOUNT_UFSTYPE_OLD:
E
Evgeniy Dushistov 已提交
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		UFSD("ufstype=old\n");
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		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				printk(KERN_INFO "ufstype=old is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_NEXTSTEP:
721
		/*TODO: check may be we need set special dir block size?*/
E
Evgeniy Dushistov 已提交
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		UFSD("ufstype=nextstep\n");
L
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723 724 725 726 727 728 729 730 731 732 733 734 735 736
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
737
		/*TODO: check may be we need set special dir block size?*/
E
Evgeniy Dushistov 已提交
738
		UFSD("ufstype=nextstep-cd\n");
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739 740 741 742 743 744 745 746 747 748 749 750 751 752
		uspi->s_fsize = block_size = 2048;
		uspi->s_fmask = ~(2048 - 1);
		uspi->s_fshift = 11;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_OPENSTEP:
E
Evgeniy Dushistov 已提交
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		UFSD("ufstype=openstep\n");
L
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754 755 756 757 758
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
759
		uspi->s_dirblksize = 1024;
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760 761 762 763 764 765 766 767 768
		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				printk(KERN_INFO "ufstype=openstep is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_HP:
E
Evgeniy Dushistov 已提交
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		UFSD("ufstype=hp\n");
L
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770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = super_block_size = 2048;
		uspi->s_sbbase = 0;
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				printk(KERN_INFO "ufstype=hp is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
 		}
 		break;
	default:
		if (!silent)
			printk("unknown ufstype\n");
		goto failed;
	}
	
again:	
	if (!sb_set_blocksize(sb, block_size)) {
		printk(KERN_ERR "UFS: failed to set blocksize\n");
		goto failed;
	}

	/*
	 * read ufs super block from device
	 */
E
Evgeniy 已提交
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	ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
	
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	if (!ubh) 
            goto failed;

	
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	usb1 = ubh_get_usb_first(uspi);
	usb2 = ubh_get_usb_second(uspi);
	usb3 = ubh_get_usb_third(uspi);
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807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887

	/*
	 * Check ufs magic number
	 */
	sbi->s_bytesex = BYTESEX_LE;
	switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
		case UFS_MAGIC:
		case UFS2_MAGIC:
		case UFS_MAGIC_LFN:
	        case UFS_MAGIC_FEA:
	        case UFS_MAGIC_4GB:
			goto magic_found;
	}
	sbi->s_bytesex = BYTESEX_BE;
	switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
		case UFS_MAGIC:
		case UFS2_MAGIC:
		case UFS_MAGIC_LFN:
	        case UFS_MAGIC_FEA:
	        case UFS_MAGIC_4GB:
			goto magic_found;
	}

	if ((((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP) 
	  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_NEXTSTEP_CD) 
	  || ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_OPENSTEP)) 
	  && uspi->s_sbbase < 256) {
		ubh_brelse_uspi(uspi);
		ubh = NULL;
		uspi->s_sbbase += 8;
		goto again;
	}
	if (!silent)
		printk("ufs_read_super: bad magic number\n");
	goto failed;

magic_found:
	/*
	 * Check block and fragment sizes
	 */
	uspi->s_bsize = fs32_to_cpu(sb, usb1->fs_bsize);
	uspi->s_fsize = fs32_to_cpu(sb, usb1->fs_fsize);
	uspi->s_sbsize = fs32_to_cpu(sb, usb1->fs_sbsize);
	uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);

	if (uspi->s_fsize & (uspi->s_fsize - 1)) {
		printk(KERN_ERR "ufs_read_super: fragment size %u is not a power of 2\n",
			uspi->s_fsize);
			goto failed;
	}
	if (uspi->s_fsize < 512) {
		printk(KERN_ERR "ufs_read_super: fragment size %u is too small\n",
			uspi->s_fsize);
		goto failed;
	}
	if (uspi->s_fsize > 4096) {
		printk(KERN_ERR "ufs_read_super: fragment size %u is too large\n",
			uspi->s_fsize);
		goto failed;
	}
	if (uspi->s_bsize & (uspi->s_bsize - 1)) {
		printk(KERN_ERR "ufs_read_super: block size %u is not a power of 2\n",
			uspi->s_bsize);
		goto failed;
	}
	if (uspi->s_bsize < 4096) {
		printk(KERN_ERR "ufs_read_super: block size %u is too small\n",
			uspi->s_bsize);
		goto failed;
	}
	if (uspi->s_bsize / uspi->s_fsize > 8) {
		printk(KERN_ERR "ufs_read_super: too many fragments per block (%u)\n",
			uspi->s_bsize / uspi->s_fsize);
		goto failed;
	}
	if (uspi->s_fsize != block_size || uspi->s_sbsize != super_block_size) {
		ubh_brelse_uspi(uspi);
		ubh = NULL;
		block_size = uspi->s_fsize;
		super_block_size = uspi->s_sbsize;
E
Evgeniy Dushistov 已提交
888
		UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
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		goto again;
	}

892 893

	ufs_print_super_stuff(sb, flags, usb1, usb2, usb3);
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	/*
	 * Check, if file system was correctly unmounted.
	 * If not, make it read only.
	 */
	if (((flags & UFS_ST_MASK) == UFS_ST_44BSD) ||
	  ((flags & UFS_ST_MASK) == UFS_ST_OLD) ||
	  (((flags & UFS_ST_MASK) == UFS_ST_SUN || 
	  (flags & UFS_ST_MASK) == UFS_ST_SUNx86) && 
	  (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time))))) {
		switch(usb1->fs_clean) {
		case UFS_FSCLEAN:
E
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			UFSD("fs is clean\n");
L
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			break;
		case UFS_FSSTABLE:
E
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			UFSD("fs is stable\n");
L
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			break;
		case UFS_FSOSF1:
E
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			UFSD("fs is DEC OSF/1\n");
L
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			break;
		case UFS_FSACTIVE:
			printk("ufs_read_super: fs is active\n");
			sb->s_flags |= MS_RDONLY;
			break;
		case UFS_FSBAD:
			printk("ufs_read_super: fs is bad\n");
			sb->s_flags |= MS_RDONLY;
			break;
		default:
			printk("ufs_read_super: can't grok fs_clean 0x%x\n", usb1->fs_clean);
			sb->s_flags |= MS_RDONLY;
			break;
		}
927
	} else {
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		printk("ufs_read_super: fs needs fsck\n");
		sb->s_flags |= MS_RDONLY;
	}

	/*
	 * Read ufs_super_block into internal data structures
	 */
	sb->s_op = &ufs_super_ops;
	sb->dq_op = NULL; /***/
	sb->s_magic = fs32_to_cpu(sb, usb3->fs_magic);

	uspi->s_sblkno = fs32_to_cpu(sb, usb1->fs_sblkno);
	uspi->s_cblkno = fs32_to_cpu(sb, usb1->fs_cblkno);
	uspi->s_iblkno = fs32_to_cpu(sb, usb1->fs_iblkno);
	uspi->s_dblkno = fs32_to_cpu(sb, usb1->fs_dblkno);
	uspi->s_cgoffset = fs32_to_cpu(sb, usb1->fs_cgoffset);
	uspi->s_cgmask = fs32_to_cpu(sb, usb1->fs_cgmask);

	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
947 948 949
		uspi->s_u2_size  = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_size);
		uspi->s_u2_dsize = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
	} else {
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		uspi->s_size  =  fs32_to_cpu(sb, usb1->fs_size);
		uspi->s_dsize =  fs32_to_cpu(sb, usb1->fs_dsize);
	}

	uspi->s_ncg = fs32_to_cpu(sb, usb1->fs_ncg);
	/* s_bsize already set */
	/* s_fsize already set */
	uspi->s_fpb = fs32_to_cpu(sb, usb1->fs_frag);
	uspi->s_minfree = fs32_to_cpu(sb, usb1->fs_minfree);
	uspi->s_bmask = fs32_to_cpu(sb, usb1->fs_bmask);
	uspi->s_fmask = fs32_to_cpu(sb, usb1->fs_fmask);
	uspi->s_bshift = fs32_to_cpu(sb, usb1->fs_bshift);
	uspi->s_fshift = fs32_to_cpu(sb, usb1->fs_fshift);
E
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	UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
		uspi->s_fshift);
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	uspi->s_fpbshift = fs32_to_cpu(sb, usb1->fs_fragshift);
	uspi->s_fsbtodb = fs32_to_cpu(sb, usb1->fs_fsbtodb);
	/* s_sbsize already set */
	uspi->s_csmask = fs32_to_cpu(sb, usb1->fs_csmask);
	uspi->s_csshift = fs32_to_cpu(sb, usb1->fs_csshift);
	uspi->s_nindir = fs32_to_cpu(sb, usb1->fs_nindir);
	uspi->s_inopb = fs32_to_cpu(sb, usb1->fs_inopb);
	uspi->s_nspf = fs32_to_cpu(sb, usb1->fs_nspf);
	uspi->s_npsect = ufs_get_fs_npsect(sb, usb1, usb3);
	uspi->s_interleave = fs32_to_cpu(sb, usb1->fs_interleave);
	uspi->s_trackskew = fs32_to_cpu(sb, usb1->fs_trackskew);
	uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);
	uspi->s_cssize = fs32_to_cpu(sb, usb1->fs_cssize);
	uspi->s_cgsize = fs32_to_cpu(sb, usb1->fs_cgsize);
	uspi->s_ntrak = fs32_to_cpu(sb, usb1->fs_ntrak);
	uspi->s_nsect = fs32_to_cpu(sb, usb1->fs_nsect);
	uspi->s_spc = fs32_to_cpu(sb, usb1->fs_spc);
	uspi->s_ipg = fs32_to_cpu(sb, usb1->fs_ipg);
	uspi->s_fpg = fs32_to_cpu(sb, usb1->fs_fpg);
984 985
	uspi->s_cpc = fs32_to_cpu(sb, usb2->fs_un.fs_u1.fs_cpc);
	uspi->s_contigsumsize = fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_contigsumsize);
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	uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
	uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
	uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
	uspi->s_nrpos = fs32_to_cpu(sb, usb3->fs_nrpos);
	uspi->s_postbloff = fs32_to_cpu(sb, usb3->fs_postbloff);
	uspi->s_rotbloff = fs32_to_cpu(sb, usb3->fs_rotbloff);

	/*
	 * Compute another frequently used values
	 */
	uspi->s_fpbmask = uspi->s_fpb - 1;
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	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
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		uspi->s_apbshift = uspi->s_bshift - 3;
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	else
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		uspi->s_apbshift = uspi->s_bshift - 2;
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	uspi->s_2apbshift = uspi->s_apbshift * 2;
	uspi->s_3apbshift = uspi->s_apbshift * 3;
	uspi->s_apb = 1 << uspi->s_apbshift;
	uspi->s_2apb = 1 << uspi->s_2apbshift;
	uspi->s_3apb = 1 << uspi->s_3apbshift;
	uspi->s_apbmask = uspi->s_apb - 1;
	uspi->s_nspfshift = uspi->s_fshift - UFS_SECTOR_BITS;
	uspi->s_nspb = uspi->s_nspf << uspi->s_fpbshift;
	uspi->s_inopf = uspi->s_inopb >> uspi->s_fpbshift;
	uspi->s_bpf = uspi->s_fsize << 3;
	uspi->s_bpfshift = uspi->s_fshift + 3;
	uspi->s_bpfmask = uspi->s_bpf - 1;
	if ((sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) ==
	    UFS_MOUNT_UFSTYPE_44BSD)
		uspi->s_maxsymlinklen =
1017
		    fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
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	sbi->s_flags = flags;

	inode = iget(sb, UFS_ROOTINO);
	if (!inode || is_bad_inode(inode))
		goto failed;
	sb->s_root = d_alloc_root(inode);
	if (!sb->s_root)
		goto dalloc_failed;

1028
	ufs_setup_cstotal(sb);
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	/*
	 * Read cylinder group structures
	 */
	if (!(sb->s_flags & MS_RDONLY))
		if (!ufs_read_cylinder_structures(sb))
			goto failed;

E
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	UFSD("EXIT\n");
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	return 0;

dalloc_failed:
	iput(inode);
failed:
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	if (ubh)
		ubh_brelse_uspi (uspi);
	kfree (uspi);
	kfree(sbi);
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	sb->s_fs_info = NULL;
E
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	UFSD("EXIT (FAILED)\n");
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	return -EINVAL;

failed_nomem:
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	UFSD("EXIT (NOMEM)\n");
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	return -ENOMEM;
}

1055 1056
static void ufs_write_super(struct super_block *sb)
{
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	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_super_block_third * usb3;
	unsigned flags;

	lock_kernel();

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	UFSD("ENTER\n");
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	flags = UFS_SB(sb)->s_flags;
	uspi = UFS_SB(sb)->s_uspi;
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	usb1 = ubh_get_usb_first(uspi);
	usb3 = ubh_get_usb_third(uspi);
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	if (!(sb->s_flags & MS_RDONLY)) {
		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
		if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
			ufs_set_fs_state(sb, usb1, usb3,
					UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1076
		ufs_put_cstotal(sb);
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	}
	sb->s_dirt = 0;
E
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	UFSD("EXIT\n");
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	unlock_kernel();
}

E
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static void ufs_put_super(struct super_block *sb)
L
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{
	struct ufs_sb_info * sbi = UFS_SB(sb);
		
E
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	UFSD("ENTER\n");
L
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	if (!(sb->s_flags & MS_RDONLY))
1090
		ufs_put_super_internal(sb);
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	ubh_brelse_uspi (sbi->s_uspi);
	kfree (sbi->s_uspi);
	kfree (sbi);
	sb->s_fs_info = NULL;
1096
	UFSD("EXIT\n");
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	return;
}


static int ufs_remount (struct super_block *sb, int *mount_flags, char *data)
{
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_super_block_third * usb3;
	unsigned new_mount_opt, ufstype;
	unsigned flags;
	
	uspi = UFS_SB(sb)->s_uspi;
	flags = UFS_SB(sb)->s_flags;
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	usb1 = ubh_get_usb_first(uspi);
	usb3 = ubh_get_usb_third(uspi);
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	/*
	 * Allow the "check" option to be passed as a remount option.
	 * It is not possible to change ufstype option during remount
	 */
	ufstype = UFS_SB(sb)->s_mount_opt & UFS_MOUNT_UFSTYPE;
	new_mount_opt = 0;
	ufs_set_opt (new_mount_opt, ONERROR_LOCK);
	if (!ufs_parse_options (data, &new_mount_opt))
		return -EINVAL;
	if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
		new_mount_opt |= ufstype;
1125
	} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
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		printk("ufstype can't be changed during remount\n");
		return -EINVAL;
	}

	if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
		UFS_SB(sb)->s_mount_opt = new_mount_opt;
		return 0;
	}
	
	/*
	 * fs was mouted as rw, remounting ro
	 */
	if (*mount_flags & MS_RDONLY) {
1139
		ufs_put_super_internal(sb);
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		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
		if ((flags & UFS_ST_MASK) == UFS_ST_SUN
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
			ufs_set_fs_state(sb, usb1, usb3,
				UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
E
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		ubh_mark_buffer_dirty (USPI_UBH(uspi));
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		sb->s_dirt = 0;
		sb->s_flags |= MS_RDONLY;
1148
	} else {
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	/*
	 * fs was mounted as ro, remounting rw
	 */
#ifndef CONFIG_UFS_FS_WRITE
		printk("ufs was compiled with read-only support, "
		"can't be mounted as read-write\n");
		return -EINVAL;
#else
		if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
		    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
		    ufstype != UFS_MOUNT_UFSTYPE_SUNx86) {
			printk("this ufstype is read-only supported\n");
			return -EINVAL;
		}
1163
		if (!ufs_read_cylinder_structures(sb)) {
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			printk("failed during remounting\n");
			return -EPERM;
		}
		sb->s_flags &= ~MS_RDONLY;
#endif
	}
	UFS_SB(sb)->s_mount_opt = new_mount_opt;
	return 0;
}

1174
static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
L
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{
1176
	struct super_block *sb = dentry->d_sb;
1177 1178 1179 1180 1181
	struct ufs_sb_private_info *uspi= UFS_SB(sb)->s_uspi;
	unsigned  flags = UFS_SB(sb)->s_flags;
	struct ufs_super_block_first *usb1;
	struct ufs_super_block_second *usb2;
	struct ufs_super_block_third *usb3;
L
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	lock_kernel();

1185 1186 1187
	usb1 = ubh_get_usb_first(uspi);
	usb2 = ubh_get_usb_second(uspi);
	usb3 = ubh_get_usb_third(uspi);
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	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
		buf->f_type = UFS2_MAGIC;
1191 1192
		buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
	} else {
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		buf->f_type = UFS_MAGIC;
		buf->f_blocks = uspi->s_dsize;
	}
1196 1197 1198
	buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
		uspi->cs_total.cs_nffree;
	buf->f_ffree = uspi->cs_total.cs_nifree;
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	buf->f_bsize = sb->s_blocksize;
	buf->f_bavail = (buf->f_bfree > (((long)buf->f_blocks / 100) * uspi->s_minfree))
		? (buf->f_bfree - (((long)buf->f_blocks / 100) * uspi->s_minfree)) : 0;
	buf->f_files = uspi->s_ncg * uspi->s_ipg;
	buf->f_namelen = UFS_MAXNAMLEN;

	unlock_kernel();

	return 0;
}

1210
static struct kmem_cache * ufs_inode_cachep;
L
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static struct inode *ufs_alloc_inode(struct super_block *sb)
{
	struct ufs_inode_info *ei;
1215
	ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
L
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	if (!ei)
		return NULL;
	ei->vfs_inode.i_version = 1;
	return &ei->vfs_inode;
}

static void ufs_destroy_inode(struct inode *inode)
{
	kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
}

1227
static void init_once(void * foo, struct kmem_cache * cachep, unsigned long flags)
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{
	struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;

	if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) ==
	    SLAB_CTOR_CONSTRUCTOR)
		inode_init_once(&ei->vfs_inode);
}
 
static int init_inodecache(void)
{
	ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
					     sizeof(struct ufs_inode_info),
1240 1241
					     0, (SLAB_RECLAIM_ACCOUNT|
						SLAB_MEM_SPREAD),
L
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					     init_once, NULL);
	if (ufs_inode_cachep == NULL)
		return -ENOMEM;
	return 0;
}

static void destroy_inodecache(void)
{
1250
	kmem_cache_destroy(ufs_inode_cachep);
L
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}

#ifdef CONFIG_QUOTA
static ssize_t ufs_quota_read(struct super_block *, int, char *,size_t, loff_t);
static ssize_t ufs_quota_write(struct super_block *, int, const char *, size_t, loff_t);
#endif

static struct super_operations ufs_super_ops = {
	.alloc_inode	= ufs_alloc_inode,
	.destroy_inode	= ufs_destroy_inode,
	.read_inode	= ufs_read_inode,
	.write_inode	= ufs_write_inode,
	.delete_inode	= ufs_delete_inode,
	.put_super	= ufs_put_super,
	.write_super	= ufs_write_super,
	.statfs		= ufs_statfs,
	.remount_fs	= ufs_remount,
#ifdef CONFIG_QUOTA
	.quota_read	= ufs_quota_read,
	.quota_write	= ufs_quota_write,
#endif
};

#ifdef CONFIG_QUOTA

/* Read data from quotafile - avoid pagecache and such because we cannot afford
 * acquiring the locks... As quota files are never truncated and quota code
 * itself serializes the operations (and noone else should touch the files)
 * we don't have to be afraid of races */
static ssize_t ufs_quota_read(struct super_block *sb, int type, char *data,
			       size_t len, loff_t off)
{
	struct inode *inode = sb_dqopt(sb)->files[type];
	sector_t blk = off >> sb->s_blocksize_bits;
	int err = 0;
	int offset = off & (sb->s_blocksize - 1);
	int tocopy;
	size_t toread;
	struct buffer_head *bh;
	loff_t i_size = i_size_read(inode);

	if (off > i_size)
		return 0;
	if (off+len > i_size)
		len = i_size-off;
	toread = len;
	while (toread > 0) {
		tocopy = sb->s_blocksize - offset < toread ?
				sb->s_blocksize - offset : toread;

		bh = ufs_bread(inode, blk, 0, &err);
		if (err)
			return err;
		if (!bh)	/* A hole? */
			memset(data, 0, tocopy);
		else {
			memcpy(data, bh->b_data+offset, tocopy);
			brelse(bh);
		}
		offset = 0;
		toread -= tocopy;
		data += tocopy;
		blk++;
	}
	return len;
}

/* Write to quotafile */
static ssize_t ufs_quota_write(struct super_block *sb, int type,
				const char *data, size_t len, loff_t off)
{
	struct inode *inode = sb_dqopt(sb)->files[type];
	sector_t blk = off >> sb->s_blocksize_bits;
	int err = 0;
	int offset = off & (sb->s_blocksize - 1);
	int tocopy;
	size_t towrite = len;
	struct buffer_head *bh;

1330
	mutex_lock_nested(&inode->i_mutex, I_MUTEX_QUOTA);
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	while (towrite > 0) {
		tocopy = sb->s_blocksize - offset < towrite ?
				sb->s_blocksize - offset : towrite;

		bh = ufs_bread(inode, blk, 1, &err);
		if (!bh)
			goto out;
		lock_buffer(bh);
		memcpy(bh->b_data+offset, data, tocopy);
		flush_dcache_page(bh->b_page);
		set_buffer_uptodate(bh);
		mark_buffer_dirty(bh);
		unlock_buffer(bh);
		brelse(bh);
		offset = 0;
		towrite -= tocopy;
		data += tocopy;
		blk++;
	}
out:
1351
	if (len == towrite) {
1352
		mutex_unlock(&inode->i_mutex);
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		return err;
1354
	}
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	if (inode->i_size < off+len-towrite)
		i_size_write(inode, off+len-towrite);
	inode->i_version++;
	inode->i_mtime = inode->i_ctime = CURRENT_TIME_SEC;
	mark_inode_dirty(inode);
1360
	mutex_unlock(&inode->i_mutex);
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	return len - towrite;
}

#endif

1366 1367
static int ufs_get_sb(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
L
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{
1369
	return get_sb_bdev(fs_type, flags, dev_name, data, ufs_fill_super, mnt);
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}

static struct file_system_type ufs_fs_type = {
	.owner		= THIS_MODULE,
	.name		= "ufs",
	.get_sb		= ufs_get_sb,
	.kill_sb	= kill_block_super,
	.fs_flags	= FS_REQUIRES_DEV,
};

static int __init init_ufs_fs(void)
{
	int err = init_inodecache();
	if (err)
		goto out1;
	err = register_filesystem(&ufs_fs_type);
	if (err)
		goto out;
	return 0;
out:
	destroy_inodecache();
out1:
	return err;
}

static void __exit exit_ufs_fs(void)
{
	unregister_filesystem(&ufs_fs_type);
	destroy_inodecache();
}

module_init(init_ufs_fs)
module_exit(exit_ufs_fs)
MODULE_LICENSE("GPL");