super.c 42.8 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
 *
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 * UFS2 write support added by
 * Evgeniy Dushistov <dushistov@mail.ru>, 2007
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 */


#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>
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#include <linux/log2.h>
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#include <linux/mount.h>
#include <linux/seq_file.h>
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#include "ufs.h"
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#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,
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				  struct ufs_super_block_first *usb1,
				  struct ufs_super_block_second *usb2,
				  struct ufs_super_block_third *usb3)
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{
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	u32 magic = fs32_to_cpu(sb, usb3->fs_magic);

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	printk("ufs_print_super_stuff\n");
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	printk("  magic:     0x%x\n", magic);
	if (fs32_to_cpu(sb, usb3->fs_magic) == UFS2_MAGIC) {
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		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));
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		printk(KERN_INFO"  cs_nifree(Num of free inodes): %llu\n",
		       (unsigned long long)
		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nifree));
		printk(KERN_INFO"  cs_nffree(Num of free frags): %llu\n",
		       (unsigned long long)
		       fs64_to_cpu(sb, usb3->fs_un1.fs_u2.cs_nffree));
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	} 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
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#  define ufs_print_super_stuff(sb, usb1, usb2, usb3) /**/
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#  define ufs_print_cylinder_stuff(sb, cg) /**/
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#endif /* CONFIG_UFS_DEBUG */
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static const struct super_operations ufs_super_ops;
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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 {
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       Opt_type_old = UFS_MOUNT_UFSTYPE_OLD,
       Opt_type_sunx86 = UFS_MOUNT_UFSTYPE_SUNx86,
       Opt_type_sun = UFS_MOUNT_UFSTYPE_SUN,
       Opt_type_sunos = UFS_MOUNT_UFSTYPE_SUNOS,
       Opt_type_44bsd = UFS_MOUNT_UFSTYPE_44BSD,
       Opt_type_ufs2 = UFS_MOUNT_UFSTYPE_UFS2,
       Opt_type_hp = UFS_MOUNT_UFSTYPE_HP,
       Opt_type_nextstepcd = UFS_MOUNT_UFSTYPE_NEXTSTEP_CD,
       Opt_type_nextstep = UFS_MOUNT_UFSTYPE_NEXTSTEP,
       Opt_type_openstep = UFS_MOUNT_UFSTYPE_OPENSTEP,
       Opt_onerror_panic = UFS_MOUNT_ONERROR_PANIC,
       Opt_onerror_lock = UFS_MOUNT_ONERROR_LOCK,
       Opt_onerror_umount = UFS_MOUNT_ONERROR_UMOUNT,
       Opt_onerror_repair = UFS_MOUNT_ONERROR_REPAIR,
       Opt_err
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};

static match_table_t tokens = {
	{Opt_type_old, "ufstype=old"},
	{Opt_type_sunx86, "ufstype=sunx86"},
	{Opt_type_sun, "ufstype=sun"},
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	{Opt_type_sunos, "ufstype=sunos"},
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	{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"},
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/*end of possible ufs types */
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	{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;
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		case Opt_type_sunos:
			ufs_clear_opt(*mount_options, UFSTYPE);
			ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
			break;
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		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;
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	struct ufs_buffer_head * ubh;
	unsigned char * base, * space;
	unsigned size, blks, i;
459 460
	struct ufs_super_block_third *usb3;

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	UFSD("ENTER\n");
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463
	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; 
473
	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;

479
		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;
509

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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]);
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	}
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	UFSD("EXIT (FAILED)\n");
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	return 0;
}

/*
536
 * Sync our internal copy of fs_cstotal with disk
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 */
538
static void ufs_put_cstotal(struct super_block *sb)
539
{
540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573
	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));
574
	ufs_print_super_stuff(sb, usb1, usb2, usb3);
575 576 577 578 579 580 581 582 583 584 585 586 587
	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;
591

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	UFSD("ENTER\n");
594
	ufs_put_cstotal(sb);
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	size = uspi->s_cssize;
	blks = (size + uspi->s_fsize - 1) >> uspi->s_fshift;
597
	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;
602

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		ubh = ubh_bread(sb, uspi->s_csaddr + i, size);
604

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		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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643
	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="
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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);
	}

677 678
	uspi = kzalloc(sizeof(struct ufs_sb_private_info), GFP_KERNEL);
	sbi->s_uspi = uspi;
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	if (!uspi)
		goto failed;
681
	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;
		break;
		
	case UFS_MOUNT_UFSTYPE_SUN:
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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;
715
		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
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		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
		break;

719 720 721 722 723 724 725 726 727 728 729 730
	case UFS_MOUNT_UFSTYPE_SUNOS:
		UFSD(("ufstype=sunos\n"))
		uspi->s_fsize = block_size = 1024;
		uspi->s_fmask = ~(1024 - 1);
		uspi->s_fshift = 10;
		uspi->s_sbsize = 2048;
		super_block_size = 2048;
		uspi->s_sbbase = 0;
		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_SUNOS | UFS_CG_SUN;
		break;

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	case UFS_MOUNT_UFSTYPE_SUNx86:
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Evgeniy Dushistov 已提交
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		UFSD("ufstype=sunx86\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;
738
		uspi->s_maxsymlinklen = 0; /* Not supported on disk */
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		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
		break;

	case UFS_MOUNT_UFSTYPE_OLD:
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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:
758
		/*TODO: check may be we need set special dir block size?*/
E
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		UFSD("ufstype=nextstep\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=nextstep is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
774
		/*TODO: check may be we need set special dir block size?*/
E
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		UFSD("ufstype=nextstep-cd\n");
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		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:
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		UFSD("ufstype=openstep\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;
796
		uspi->s_dirblksize = 1024;
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		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:
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		UFSD("ufstype=hp\n");
L
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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=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
	 */
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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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844 845 846 847 848 849 850 851
	/* Sort out mod used on SunOS 4.1.3 for fs_state */
	uspi->s_postblformat = fs32_to_cpu(sb, usb3->fs_postblformat);
	if (((flags & UFS_ST_MASK) == UFS_ST_SUNOS) &&
	    (uspi->s_postblformat != UFS_42POSTBLFMT)) {
		flags &= ~UFS_ST_MASK;
		flags |=  UFS_ST_SUN;
	}

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	/*
	 * 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);

V
vignesh babu 已提交
897
	if (!is_power_of_2(uspi->s_fsize)) {
L
Linus Torvalds 已提交
898 899 900 901 902 903 904 905 906 907 908 909 910 911
		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;
	}
V
vignesh babu 已提交
912
	if (!is_power_of_2(uspi->s_bsize)) {
L
Linus Torvalds 已提交
913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931
		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
932
		UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
L
Linus Torvalds 已提交
933 934 935
		goto again;
	}

936 937
	/* Set sbi->s_flags here, used by ufs_get_fs_state() below */
	sbi->s_flags = flags;
938
	ufs_print_super_stuff(sb, usb1, usb2, usb3);
L
Linus Torvalds 已提交
939 940 941 942 943

	/*
	 * Check, if file system was correctly unmounted.
	 * If not, make it read only.
	 */
944 945 946 947 948 949
	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_SUNOS)	||
	     ((flags & UFS_ST_MASK) == UFS_ST_SUNx86))	&&
	    (ufs_get_fs_state(sb, usb1, usb3) == (UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time)))) {
L
Linus Torvalds 已提交
950 951
		switch(usb1->fs_clean) {
		case UFS_FSCLEAN:
E
Evgeniy Dushistov 已提交
952
			UFSD("fs is clean\n");
L
Linus Torvalds 已提交
953 954
			break;
		case UFS_FSSTABLE:
E
Evgeniy Dushistov 已提交
955
			UFSD("fs is stable\n");
L
Linus Torvalds 已提交
956 957
			break;
		case UFS_FSOSF1:
E
Evgeniy Dushistov 已提交
958
			UFSD("fs is DEC OSF/1\n");
L
Linus Torvalds 已提交
959 960 961 962 963 964 965 966 967 968 969 970 971 972
			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;
		}
973
	} else {
L
Linus Torvalds 已提交
974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992
		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) {
993 994 995
		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 {
L
Linus Torvalds 已提交
996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
		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
Evgeniy Dushistov 已提交
1009 1010
	UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
		uspi->s_fshift);
L
Linus Torvalds 已提交
1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021
	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);
1022 1023 1024 1025 1026 1027

	if (uspi->fs_magic == UFS2_MAGIC)
		uspi->s_csaddr = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_csaddr);
	else
		uspi->s_csaddr = fs32_to_cpu(sb, usb1->fs_csaddr);

L
Linus Torvalds 已提交
1028 1029 1030 1031 1032 1033 1034
	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);
1035 1036
	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);
L
Linus Torvalds 已提交
1037 1038 1039 1040 1041 1042 1043 1044 1045 1046
	uspi->s_qbmask = ufs_get_fs_qbmask(sb, usb3);
	uspi->s_qfmask = ufs_get_fs_qfmask(sb, usb3);
	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;
E
Evgeniy Dushistov 已提交
1047
	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
L
Linus Torvalds 已提交
1048
		uspi->s_apbshift = uspi->s_bshift - 3;
E
Evgeniy Dushistov 已提交
1049
	else
L
Linus Torvalds 已提交
1050
		uspi->s_apbshift = uspi->s_bshift - 2;
E
Evgeniy Dushistov 已提交
1051

L
Linus Torvalds 已提交
1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066
	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 =
1067
		    fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);
L
Linus Torvalds 已提交
1068 1069 1070 1071 1072 1073 1074 1075

	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;

1076
	ufs_setup_cstotal(sb);
L
Linus Torvalds 已提交
1077 1078 1079 1080 1081 1082 1083
	/*
	 * Read cylinder group structures
	 */
	if (!(sb->s_flags & MS_RDONLY))
		if (!ufs_read_cylinder_structures(sb))
			goto failed;

E
Evgeniy Dushistov 已提交
1084
	UFSD("EXIT\n");
L
Linus Torvalds 已提交
1085 1086 1087 1088 1089
	return 0;

dalloc_failed:
	iput(inode);
failed:
J
Jesper Juhl 已提交
1090 1091 1092 1093
	if (ubh)
		ubh_brelse_uspi (uspi);
	kfree (uspi);
	kfree(sbi);
L
Linus Torvalds 已提交
1094
	sb->s_fs_info = NULL;
E
Evgeniy Dushistov 已提交
1095
	UFSD("EXIT (FAILED)\n");
L
Linus Torvalds 已提交
1096 1097 1098
	return -EINVAL;

failed_nomem:
E
Evgeniy Dushistov 已提交
1099
	UFSD("EXIT (NOMEM)\n");
L
Linus Torvalds 已提交
1100 1101 1102
	return -ENOMEM;
}

1103 1104
static void ufs_write_super(struct super_block *sb)
{
L
Linus Torvalds 已提交
1105 1106 1107 1108 1109 1110
	struct ufs_sb_private_info * uspi;
	struct ufs_super_block_first * usb1;
	struct ufs_super_block_third * usb3;
	unsigned flags;

	lock_kernel();
E
Evgeniy Dushistov 已提交
1111
	UFSD("ENTER\n");
L
Linus Torvalds 已提交
1112 1113
	flags = UFS_SB(sb)->s_flags;
	uspi = UFS_SB(sb)->s_uspi;
E
Evgeniy 已提交
1114 1115
	usb1 = ubh_get_usb_first(uspi);
	usb3 = ubh_get_usb_third(uspi);
L
Linus Torvalds 已提交
1116 1117 1118 1119

	if (!(sb->s_flags & MS_RDONLY)) {
		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
		if ((flags & UFS_ST_MASK) == UFS_ST_SUN 
1120
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
L
Linus Torvalds 已提交
1121 1122 1123
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86)
			ufs_set_fs_state(sb, usb1, usb3,
					UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
1124
		ufs_put_cstotal(sb);
L
Linus Torvalds 已提交
1125 1126
	}
	sb->s_dirt = 0;
E
Evgeniy Dushistov 已提交
1127
	UFSD("EXIT\n");
L
Linus Torvalds 已提交
1128 1129 1130
	unlock_kernel();
}

E
Evgeniy Dushistov 已提交
1131
static void ufs_put_super(struct super_block *sb)
L
Linus Torvalds 已提交
1132 1133 1134
{
	struct ufs_sb_info * sbi = UFS_SB(sb);
		
E
Evgeniy Dushistov 已提交
1135
	UFSD("ENTER\n");
L
Linus Torvalds 已提交
1136 1137

	if (!(sb->s_flags & MS_RDONLY))
1138
		ufs_put_super_internal(sb);
L
Linus Torvalds 已提交
1139 1140 1141 1142 1143
	
	ubh_brelse_uspi (sbi->s_uspi);
	kfree (sbi->s_uspi);
	kfree (sbi);
	sb->s_fs_info = NULL;
1144
	UFSD("EXIT\n");
L
Linus Torvalds 已提交
1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158
	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;
E
Evgeniy 已提交
1159 1160
	usb1 = ubh_get_usb_first(uspi);
	usb3 = ubh_get_usb_third(uspi);
L
Linus Torvalds 已提交
1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172
	
	/*
	 * 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;
1173
	} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
L
Linus Torvalds 已提交
1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186
		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) {
1187
		ufs_put_super_internal(sb);
L
Linus Torvalds 已提交
1188 1189
		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
		if ((flags & UFS_ST_MASK) == UFS_ST_SUN
1190
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
L
Linus Torvalds 已提交
1191 1192 1193
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
			ufs_set_fs_state(sb, usb1, usb3,
				UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
E
Evgeniy Dushistov 已提交
1194
		ubh_mark_buffer_dirty (USPI_UBH(uspi));
L
Linus Torvalds 已提交
1195 1196
		sb->s_dirt = 0;
		sb->s_flags |= MS_RDONLY;
1197
	} else {
L
Linus Torvalds 已提交
1198 1199 1200 1201 1202 1203 1204 1205 1206
	/*
	 * 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 && 
1207
		    ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
L
Linus Torvalds 已提交
1208
		    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
1209 1210
		    ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
		    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
L
Linus Torvalds 已提交
1211 1212 1213
			printk("this ufstype is read-only supported\n");
			return -EINVAL;
		}
1214
		if (!ufs_read_cylinder_structures(sb)) {
L
Linus Torvalds 已提交
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224
			printk("failed during remounting\n");
			return -EPERM;
		}
		sb->s_flags &= ~MS_RDONLY;
#endif
	}
	UFS_SB(sb)->s_mount_opt = new_mount_opt;
	return 0;
}

E
Evgeniy Dushistov 已提交
1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244
static int ufs_show_options(struct seq_file *seq, struct vfsmount *vfs)
{
	struct ufs_sb_info *sbi = UFS_SB(vfs->mnt_sb);
	unsigned mval = sbi->s_mount_opt & UFS_MOUNT_UFSTYPE;
	struct match_token *tp = tokens;

	while (tp->token != Opt_onerror_panic && tp->token != mval)
		++tp;
	BUG_ON(tp->token == Opt_onerror_panic);
	seq_printf(seq, ",%s", tp->pattern);

	mval = sbi->s_mount_opt & UFS_MOUNT_ONERROR;
	while (tp->token != Opt_err && tp->token != mval)
		++tp;
	BUG_ON(tp->token == Opt_err);
	seq_printf(seq, ",%s", tp->pattern);

	return 0;
}

1245
static int ufs_statfs(struct dentry *dentry, struct kstatfs *buf)
L
Linus Torvalds 已提交
1246
{
1247
	struct super_block *sb = dentry->d_sb;
1248 1249 1250 1251 1252
	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
Linus Torvalds 已提交
1253 1254 1255

	lock_kernel();

1256 1257 1258
	usb1 = ubh_get_usb_first(uspi);
	usb2 = ubh_get_usb_second(uspi);
	usb3 = ubh_get_usb_third(uspi);
L
Linus Torvalds 已提交
1259 1260 1261
	
	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2) {
		buf->f_type = UFS2_MAGIC;
1262 1263
		buf->f_blocks = fs64_to_cpu(sb, usb3->fs_un1.fs_u2.fs_dsize);
	} else {
L
Linus Torvalds 已提交
1264 1265 1266
		buf->f_type = UFS_MAGIC;
		buf->f_blocks = uspi->s_dsize;
	}
1267 1268 1269
	buf->f_bfree = ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
		uspi->cs_total.cs_nffree;
	buf->f_ffree = uspi->cs_total.cs_nifree;
L
Linus Torvalds 已提交
1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280
	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;
}

1281
static struct kmem_cache * ufs_inode_cachep;
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static struct inode *ufs_alloc_inode(struct super_block *sb)
{
	struct ufs_inode_info *ei;
1286
	ei = (struct ufs_inode_info *)kmem_cache_alloc(ufs_inode_cachep, GFP_KERNEL);
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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));
}

1298
static void init_once(struct kmem_cache * cachep, void *foo)
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{
	struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;

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	inode_init_once(&ei->vfs_inode);
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}
1304

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static int init_inodecache(void)
{
	ufs_inode_cachep = kmem_cache_create("ufs_inode_cache",
					     sizeof(struct ufs_inode_info),
1309 1310
					     0, (SLAB_RECLAIM_ACCOUNT|
						SLAB_MEM_SPREAD),
1311
					     init_once);
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	if (ufs_inode_cachep == NULL)
		return -ENOMEM;
	return 0;
}

static void destroy_inodecache(void)
{
1319
	kmem_cache_destroy(ufs_inode_cachep);
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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

1327
static const struct super_operations ufs_super_ops = {
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	.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,
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	.show_options   = ufs_show_options,
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#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;

1400
	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:
1421
	if (len == towrite) {
1422
		mutex_unlock(&inode->i_mutex);
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		return err;
1424
	}
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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);
1430
	mutex_unlock(&inode->i_mutex);
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	return len - towrite;
}

#endif

1436 1437
static int ufs_get_sb(struct file_system_type *fs_type,
	int flags, const char *dev_name, void *data, struct vfsmount *mnt)
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{
1439
	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");