示例#1
0
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;
	unsigned super_block_offset;
	unsigned maxsymlen;
	int ret = -EINVAL;

	uspi = NULL;
	ubh = NULL;
	flags = 0;
	
	UFSD("ENTER\n");

#ifndef CONFIG_UFS_FS_WRITE
	if (!(sb->s_flags & MS_RDONLY)) {
		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
		return -EROFS;
	}
#endif
		
	sbi = kzalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
	if (!sbi)
		goto failed_nomem;
	sb->s_fs_info = sbi;
	sbi->sb = sb;

	UFSD("flag %u\n", (int)(sb->s_flags & MS_RDONLY));
	
	mutex_init(&sbi->s_lock);
	spin_lock_init(&sbi->work_lock);
	INIT_DELAYED_WORK(&sbi->sync_work, delayed_sync_fs);
	/*
	 * 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)) {
		pr_err("wrong mount options\n");
		goto failed;
	}
	if (!(sbi->s_mount_opt & UFS_MOUNT_UFSTYPE)) {
		if (!silent)
			pr_err("You didn't specify the type of your ufs filesystem\n\n"
			"mount -t ufs -o ufstype="
			"sun|sunx86|44bsd|ufs2|5xbsd|old|hp|nextstep|nextstep-cd|openstep ...\n\n"
			">>>WARNING<<< Wrong ufstype may corrupt your filesystem, "
			"default is ufstype=old\n");
		ufs_set_opt (sbi->s_mount_opt, UFSTYPE_OLD);
	}

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

	/* 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:
		UFSD("ufstype=44bsd\n");
		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:
		UFSD("ufstype=ufs2\n");
		super_block_offset=SBLOCK_UFS2;
		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:
		UFSD("ufstype=sun\n");
		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 = 0; /* Not supported on disk */
		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUN | UFS_CG_SUN;
		break;

	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;

	case UFS_MOUNT_UFSTYPE_SUNx86:
		UFSD("ufstype=sunx86\n");
		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 = 0; /* Not supported on disk */
		flags |= UFS_DE_OLD | UFS_UID_EFT | UFS_ST_SUNx86 | UFS_CG_SUN;
		break;

	case UFS_MOUNT_UFSTYPE_OLD:
		UFSD("ufstype=old\n");
		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)
				pr_info("ufstype=old is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_NEXTSTEP:
		UFSD("ufstype=nextstep\n");
		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_dirblksize = 1024;
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				pr_info("ufstype=nextstep is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
		UFSD("ufstype=nextstep-cd\n");
		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;
		uspi->s_dirblksize = 1024;
		flags |= UFS_DE_OLD | UFS_UID_OLD | UFS_ST_OLD | UFS_CG_OLD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				pr_info("ufstype=nextstep-cd is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_OPENSTEP:
		UFSD("ufstype=openstep\n");
		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_dirblksize = 1024;
		flags |= UFS_DE_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		if (!(sb->s_flags & MS_RDONLY)) {
			if (!silent)
				pr_info("ufstype=openstep is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_HP:
		UFSD("ufstype=hp\n");
		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)
				pr_info("ufstype=hp is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
 		}
 		break;
	default:
		if (!silent)
			pr_err("unknown ufstype\n");
		goto failed;
	}
	
again:	
	if (!sb_set_blocksize(sb, block_size)) {
		pr_err("failed to set blocksize\n");
		goto failed;
	}

	/*
	 * read ufs super block from device
	 */

	ubh = ubh_bread_uspi(uspi, sb, uspi->s_sbbase + super_block_offset/block_size, super_block_size);
	
	if (!ubh) 
            goto failed;

	usb1 = ubh_get_usb_first(uspi);
	usb2 = ubh_get_usb_second(uspi);
	usb3 = ubh_get_usb_third(uspi);

	/* 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;
	}

	/*
	 * Check ufs magic number
	 */
	sbi->s_bytesex = BYTESEX_LE;
	switch ((uspi->fs_magic = fs32_to_cpu(sb, usb3->fs_magic))) {
		case UFS_MAGIC:
		case UFS_MAGIC_BW:
		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 UFS_MAGIC_BW:
		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)
		pr_err("%s(): bad magic number\n", __func__);
	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 (!is_power_of_2(uspi->s_fsize)) {
		pr_err("%s(): fragment size %u is not a power of 2\n",
		       __func__, uspi->s_fsize);
		goto failed;
	}
	if (uspi->s_fsize < 512) {
		pr_err("%s(): fragment size %u is too small\n",
		       __func__, uspi->s_fsize);
		goto failed;
	}
	if (uspi->s_fsize > 4096) {
		pr_err("%s(): fragment size %u is too large\n",
		       __func__, uspi->s_fsize);
		goto failed;
	}
	if (!is_power_of_2(uspi->s_bsize)) {
		pr_err("%s(): block size %u is not a power of 2\n",
		       __func__, uspi->s_bsize);
		goto failed;
	}
	if (uspi->s_bsize < 4096) {
		pr_err("%s(): block size %u is too small\n",
		       __func__, uspi->s_bsize);
		goto failed;
	}
	if (uspi->s_bsize / uspi->s_fsize > 8) {
		pr_err("%s(): too many fragments per block (%u)\n",
		       __func__, 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;
		UFSD("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size);
		goto again;
	}

	sbi->s_flags = flags;/*after that line some functions use s_flags*/
	ufs_print_super_stuff(sb, usb1, usb2, usb3);

	/*
	 * 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_SUNOS ||
	  (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:
			UFSD("fs is clean\n");
			break;
		case UFS_FSSTABLE:
			UFSD("fs is stable\n");
			break;
		case UFS_FSLOG:
			UFSD("fs is logging fs\n");
			break;
		case UFS_FSOSF1:
			UFSD("fs is DEC OSF/1\n");
			break;
		case UFS_FSACTIVE:
			pr_err("%s(): fs is active\n", __func__);
			sb->s_flags |= MS_RDONLY;
			break;
		case UFS_FSBAD:
			pr_err("%s(): fs is bad\n", __func__);
			sb->s_flags |= MS_RDONLY;
			break;
		default:
			pr_err("%s(): can't grok fs_clean 0x%x\n",
			       __func__, usb1->fs_clean);
			sb->s_flags |= MS_RDONLY;
			break;
		}
	} else {
		pr_err("%s(): fs needs fsck\n", __func__);
		sb->s_flags |= MS_RDONLY;
	}

	/*
	 * Read ufs_super_block into internal data structures
	 */
	sb->s_op = &ufs_super_ops;
	sb->s_export_op = &ufs_export_ops;

	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) {
		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 {
		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);
	UFSD("uspi->s_bshift = %d,uspi->s_fshift = %d", uspi->s_bshift,
		uspi->s_fshift);
	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);

	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);

	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);
	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);
	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;
	if ((flags & UFS_TYPE_MASK) == UFS_TYPE_UFS2)
		uspi->s_apbshift = uspi->s_bshift - 3;
	else
		uspi->s_apbshift = uspi->s_bshift - 2;

	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 ||
	    (sbi->s_mount_opt & UFS_MOUNT_UFSTYPE) == UFS_MOUNT_UFSTYPE_UFS2)
		uspi->s_maxsymlinklen =
		    fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_maxsymlinklen);

	if (uspi->fs_magic == UFS2_MAGIC)
		maxsymlen = 2 * 4 * (UFS_NDADDR + UFS_NINDIR);
	else
		maxsymlen = 4 * (UFS_NDADDR + UFS_NINDIR);
	if (uspi->s_maxsymlinklen > maxsymlen) {
		ufs_warning(sb, __func__, "ufs_read_super: excessive maximum "
			    "fast symlink size (%u)\n", uspi->s_maxsymlinklen);
		uspi->s_maxsymlinklen = maxsymlen;
	}
	sb->s_max_links = UFS_LINK_MAX;

	inode = ufs_iget(sb, UFS_ROOTINO);
	if (IS_ERR(inode)) {
		ret = PTR_ERR(inode);
		goto failed;
	}
	sb->s_root = d_make_root(inode);
	if (!sb->s_root) {
		ret = -ENOMEM;
		goto failed;
	}

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

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

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

failed_nomem:
	UFSD("EXIT (NOMEM)\n");
	return -ENOMEM;
}
示例#2
0
static int ufs_parse_options (char * options, unsigned * mount_options)
{
	char * p;
	
	UFSD("ENTER\n");
	
	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_sunos:
			ufs_clear_opt(*mount_options, UFSTYPE);
			ufs_set_opt(*mount_options, UFSTYPE_SUNOS);
			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:
			pr_err("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:
			pr_err("Invalid option: \"%s\" or missing value\n", p);
			return 0;
		}
	}
	return 1;
}
示例#3
0
文件: super.c 项目: xricson/knoppix
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;

	uspi = NULL;
	ubh = NULL;
	flags = 0;
	
	UFSD(("ENTER\n"))
		
	sbi = kmalloc(sizeof(struct ufs_sb_info), GFP_KERNEL);
	if (!sbi)
		goto failed_nomem;
	sb->s_fs_info = sbi;
	memset(sbi, 0, sizeof(struct ufs_sb_info));

	UFSD(("flag %u\n", (int)(sb->s_flags & MS_RDONLY)))
	
#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)) {
		printk("You didn't specify the type of your ufs filesystem\n\n"
		"mount -t ufs -o ufstype="
		"sun|sunx86|44bsd|old|hp|nextstep|netxstep-cd|openstep ...\n\n"
		">>>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;

	/* 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:
		UFSD(("ufstype=44bsd\n"))
		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_SUN:
		UFSD(("ufstype=sun\n"))
		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:
		UFSD(("ufstype=sunx86\n"))
		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:
		UFSD(("ufstype=old\n"))
		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)) {
			printk(KERN_INFO "ufstype=old is supported read-only\n"); 
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_NEXTSTEP:
		UFSD(("ufstype=nextstep\n"))
		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)) {
			printk(KERN_INFO "ufstype=nextstep is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_NEXTSTEP_CD:
		UFSD(("ufstype=nextstep-cd\n"))
		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)) {
			printk(KERN_INFO "ufstype=nextstep-cd is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_OPENSTEP:
		UFSD(("ufstype=openstep\n"))
		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_44BSD | UFS_UID_44BSD | UFS_ST_44BSD | UFS_CG_44BSD;
		if (!(sb->s_flags & MS_RDONLY)) {
			printk(KERN_INFO "ufstype=openstep is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
		}
		break;
	
	case UFS_MOUNT_UFSTYPE_HP:
		UFSD(("ufstype=hp\n"))
		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)) {
			printk(KERN_INFO "ufstype=hp is supported read-only\n");
			sb->s_flags |= MS_RDONLY;
 		}
 		break;
	default:
		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
	 */
	ubh = ubh_bread_uspi (uspi, sb, uspi->s_sbbase + UFS_SBLOCK/block_size, super_block_size);
	if (!ubh) 
		goto failed;
	
	usb1 = ubh_get_usb_first(USPI_UBH);
	usb2 = ubh_get_usb_second(USPI_UBH);
	usb3 = ubh_get_usb_third(USPI_UBH);

	/*
	 * Check ufs magic number
	 */
	switch (__constant_le32_to_cpu(usb3->fs_magic)) {
		case UFS_MAGIC:
		case UFS_MAGIC_LFN:
	        case UFS_MAGIC_FEA:
	        case UFS_MAGIC_4GB:
			sbi->s_bytesex = BYTESEX_LE;
			goto magic_found;
	}
	switch (__constant_be32_to_cpu(usb3->fs_magic)) {
		case UFS_MAGIC:
		case UFS_MAGIC_LFN:
	        case UFS_MAGIC_FEA:
	        case UFS_MAGIC_4GB:
			sbi->s_bytesex = BYTESEX_BE;
			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;
	}
	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;
		UFSD(("another value of block_size or super_block_size %u, %u\n", block_size, super_block_size))
		goto again;
	}
示例#4
0
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;

	sync_filesystem(sb);
	mutex_lock(&UFS_SB(sb)->s_lock);
	uspi = UFS_SB(sb)->s_uspi;
	flags = UFS_SB(sb)->s_flags;
	usb1 = ubh_get_usb_first(uspi);
	usb3 = ubh_get_usb_third(uspi);
	
	/*
	 * 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)) {
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return -EINVAL;
	}
	if (!(new_mount_opt & UFS_MOUNT_UFSTYPE)) {
		new_mount_opt |= ufstype;
	} else if ((new_mount_opt & UFS_MOUNT_UFSTYPE) != ufstype) {
		pr_err("ufstype can't be changed during remount\n");
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return -EINVAL;
	}

	if ((*mount_flags & MS_RDONLY) == (sb->s_flags & MS_RDONLY)) {
		UFS_SB(sb)->s_mount_opt = new_mount_opt;
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return 0;
	}
	
	/*
	 * fs was mouted as rw, remounting ro
	 */
	if (*mount_flags & MS_RDONLY) {
		ufs_put_super_internal(sb);
		usb1->fs_time = cpu_to_fs32(sb, get_seconds());
		if ((flags & UFS_ST_MASK) == UFS_ST_SUN
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNOS
		  || (flags & UFS_ST_MASK) == UFS_ST_SUNx86) 
			ufs_set_fs_state(sb, usb1, usb3,
				UFS_FSOK - fs32_to_cpu(sb, usb1->fs_time));
		ubh_mark_buffer_dirty (USPI_UBH(uspi));
		sb->s_flags |= MS_RDONLY;
	} else {
	/*
	 * fs was mounted as ro, remounting rw
	 */
#ifndef CONFIG_UFS_FS_WRITE
		pr_err("ufs was compiled with read-only support, can't be mounted as read-write\n");
		mutex_unlock(&UFS_SB(sb)->s_lock);
		return -EINVAL;
#else
		if (ufstype != UFS_MOUNT_UFSTYPE_SUN && 
		    ufstype != UFS_MOUNT_UFSTYPE_SUNOS &&
		    ufstype != UFS_MOUNT_UFSTYPE_44BSD &&
		    ufstype != UFS_MOUNT_UFSTYPE_SUNx86 &&
		    ufstype != UFS_MOUNT_UFSTYPE_UFS2) {
			pr_err("this ufstype is read-only supported\n");
			mutex_unlock(&UFS_SB(sb)->s_lock);
			return -EINVAL;
		}
		if (!ufs_read_cylinder_structures(sb)) {
			pr_err("failed during remounting\n");
			mutex_unlock(&UFS_SB(sb)->s_lock);
			return -EPERM;
		}
		sb->s_flags &= ~MS_RDONLY;
#endif
	}
	UFS_SB(sb)->s_mount_opt = new_mount_opt;
	mutex_unlock(&UFS_SB(sb)->s_lock);
	return 0;
}
示例#5
0
文件: super.c 项目: hugh712/Jollen
static int ufs_parse_options (char * options, unsigned * mount_options)
{
	char * this_char;
	char * value;
	
	UFSD(("ENTER\n"))
	
	if (!options)
		return 1;
		
	for (this_char = strtok (options, ",");
	     this_char != NULL;
	     this_char = strtok (NULL, ",")) {
	     
		if ((value = strchr (this_char, '=')) != NULL)
			*value++ = 0;
		if (!strcmp (this_char, "ufstype")) {
			ufs_clear_opt (*mount_options, UFSTYPE);
			if (!strcmp (value, "old"))
				ufs_set_opt (*mount_options, UFSTYPE_OLD);
			else if (!strcmp (value, "sun"))
				ufs_set_opt (*mount_options, UFSTYPE_SUN);
			else if (!strcmp (value, "44bsd"))
				ufs_set_opt (*mount_options, UFSTYPE_44BSD);
			else if (!strcmp (value, "nextstep"))
				ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP);
			else if (!strcmp (value, "nextstep-cd"))
				ufs_set_opt (*mount_options, UFSTYPE_NEXTSTEP_CD);
			else if (!strcmp (value, "openstep"))
				ufs_set_opt (*mount_options, UFSTYPE_OPENSTEP);
			else if (!strcmp (value, "sunx86"))
				ufs_set_opt (*mount_options, UFSTYPE_SUNx86);
			else if (!strcmp (value, "hp"))
				ufs_set_opt (*mount_options, UFSTYPE_HP);
			else {
				printk ("UFS-fs: Invalid type option: %s\n", value);
				return 0;
			}
		}
		else if (!strcmp (this_char, "onerror")) {
			ufs_clear_opt (*mount_options, ONERROR);
			if (!strcmp (value, "panic"))
				ufs_set_opt (*mount_options, ONERROR_PANIC);
			else if (!strcmp (value, "lock"))
				ufs_set_opt (*mount_options, ONERROR_LOCK);
			else if (!strcmp (value, "umount"))
				ufs_set_opt (*mount_options, ONERROR_UMOUNT);
			else if (!strcmp (value, "repair")) {
				printk("UFS-fs: Unable to do repair on error, "
					"will lock lock instead \n");
				ufs_set_opt (*mount_options, ONERROR_REPAIR);
			}
			else {
				printk ("UFS-fs: Invalid action onerror: %s\n", value);
				return 0;
			}
		}
		else {
			printk("UFS-fs: Invalid option: %s\n", this_char);
			return 0;
		}
	}
	return 1;
}