/*
 * Copyright 2001-2004 by Hans Reiser, licensing governed by 
 * reiserfsprogs/README
 */

#include "fsck.h"

#if defined(HAVE_LIBUUID) && defined(HAVE_UUID_UUID_H)
#    include <uuid/uuid.h>
#endif

#define fsck_conditional_log(sb_found, fmt, list...) {	\
    if (sb_found)					\
    	fsck_log(fmt, ## list);				\
}

int what_fs_version ()
{
    size_t n = 0;
    char * answer = 0;
    int version;
    printf("\nwhat the version of ReiserFS do you use[1-4]\n"
        "\t(1)   3.6.x\n"
        "\t(2) >=3.5.9 (introduced in the middle of 1999) (if you use linux 2.2, choose this one)\n"
        "\t(3) < 3.5.9 converted to new format (don't choose if unsure)\n"
        "\t(4) < 3.5.9 (this is very old format, don't choose if unsure)\n"
        "\t(X)   exit\n");
    getline (&answer, &n, stdin);
    version = atoi (answer);
    if (version < 1 || version > 4)
        die ("rebuild_sb: wrong version");
    return version;
}

/*
#define super_error(exit_code, text) {	\
    fsck_log(text);			\
    return exit_code;			\
}
    
int check_sb (reiserfs_filsys_t * fs) {
    int magic = 0, version = 0;
    
    if (!is_blocksize_correct (fs->fs_blocksize)) 
	super_error(-1, "Wrong blocksize found in the super block\n");

    if (is_reiserfs_3_6_magic_string (sb))
	magic = 2;
    else if (is_reiserfs_3_5_magic_string (sb))
	magic = 1;
    else if (is_reiserfs_jr_magic_string (sb))
	magic = 3;
    else 
	super_error(-1, "Invalid magic found in the super block.\n");
    
    if (magic == 1 || magic == 2) {
	if (fsck_data (fs)->journal_dev_name)
            fsck_log("Reiserfs with standard journal found, but there was specified a "
		"journal dev\n");
	
	standard_journal = 1;
    } else {
	if (!fsck_data (fs)->journal_dev_name) 
            super_error(-1, "Reiserfs with non standard journal found, but there was not "
		"specified any journal dev\n");
	
	standard_journal = 0;
    }
    
    if (get_sb_version (sb) != REISERFS_FORMAT_3_6 && get_sb_version (sb) != REISERFS_FORMAT_3_5) 
	super_error(-1, "Invalid format found in the super block.\n");
	
    if (is_new_sb_location(fs->fs_super_bh->b_blocknr, fs->fs_blocksize)) 
    {
	if (magic == 3) 
	    version = get_sb_version (sb) == REISERFS_FORMAT_3_6 ? 1 : 2;
	else
	    version = magic == 2 ? 1 : 2;	
    } else if (is_old_sb_location(fs->fs_super_bh->b_blocknr, fs->fs_blocksize)) {
	if (magic == 3) 
	    version = get_sb_version (sb) == REISERFS_FORMAT_3_6 ? 3 : 4;
	else 
	    version = magic == 2 ? 3 : 4;	
    } else 
	die("Super block in the wong block(%d).\n", fs->fs_super_bh->b_blocknr);
    
    if (version == 0) 
	die ("FS format must be figured out here.\n");

    if (get_sb_block_count (sb) > count_blocks (filename, fs->fs_blocksize)) 
	super_error(-1, "Invalid block count found in the super block.\n");

    if (get_sb_block_size (sb) != fs->fs_blocksize) 
        super_error(-1, "Invalid block size found in the super block (%lu).\n", 
	    get_sb_block_size (sb));

//Non needed from here
    p_oid_maxsize = (fs->fs_blocksize - reiserfs_super_block_size (sb)) / sizeof(__u32) / 2 * 2;    
    if (get_sb_oid_maxsize (sb) != p_oid_maxsize) 
	super_error(-1, "Invalid objectid map max size found in the super block (%lu).\n", 
	    get_sb_oid_maxsize (sb));

    if (get_sb_oid_cursize (sb) == 1 || get_sb_oid_cursize (sb) > get_sb_oid_maxsize (sb))
        super_error(-1, "Invalid objectid map found in the super block (%lu).\n", 
	    get_sb_oid_cursize (sb));

    if (get_sb_root_block (sb) > block_count && get_sb_root_block (sb) != ~0) 
	fsck_log("Invalid root block found in the super block (%lu).\n", 
	    get_sb_root_block (sb));

    if (get_sb_free_blocks (sb) > block_count) 
	fsck_log ("Invalid free block count found in the super block (%lu).\n", 
	    get_sb_free_blocks (sb));

    if (get_sb_tree_height (sb) && ((get_sb_tree_height (sb) < DISK_LEAF_NODE_LEVEL + 1) ||
	(get_sb_tree_height (sb) > MAX_HEIGHT) && (get_sb_tree_height (sb) != ~0))) 
	super_error(-1, "Invalid tree height found in the super block (%lu).\n", 
	    get_sb_tree_height (sb));

    if (get_sb_hash_code (sb) && code2name (get_sb_hash_code (sb)) == 0) 
	super_error(-1, "Invalid hash found in the super block (%lu).\n", 
	    get_sb_hash_code (sb));

    if (version == 1 || version == 3) {
        if (!uuid_is_correct(sb->s_uuid)) 
	    fsck_log ("Invalid uuid found, you should generate a new one.\n");

	if (sb->s_flags & 0xfffffffe)
	    fsck_log ("rebuild-sb: super block flags found (%u), zeroed\n", sb->s_flags);
    }

//Not needed till here.

    p_bmap_nr = (block_count + (fs->fs_blocksize * 8 - 1)) / (fs->fs_blocksize * 8);
    if (get_sb_bmap_nr (sb) != p_bmap_nr) 
	super_error(-1, "Invalid bitmap number found in the super block (%lu).\n", 
	    get_sb_bmap_nr (sb));

    if (!fsck_skip_journal (fs) && standard_journal == 1) {
        if (get_jp_journal_dev (sb_jp(sb)) != 0)
 	    super_error(-1, "Invalid journal device found (%lu).\n", get_jp_journal_dev (sb_jp(sb)));

        if (get_jp_journal_1st_block (sb_jp(sb)) != get_journal_start_must (fs)) 
            super_error(-1, "Invalid journal first block found (%lu).\n", get_jp_journal_1st_block (sb_jp(sb)));

        if (get_jp_journal_size (sb_jp(sb)) != journal_default_size(fs->fs_super_bh->b_blocknr, fs->fs_blocksize)) 
	    super_error(-1, "Invalid journal size found (%lu).\n", get_jp_journal_size (sb_jp(sb)) + 1);
        
        
	
	if (get_jp_journal_max_batch (sb_jp(sb)) != advise_journal_max_batch(get_jp_journal_max_trans_len (sb_jp(sb)))) {
 	    fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal max batch size occured (%lu), fixed (%d)\n",
 	        get_jp_journal_max_batch (sb_jp(sb)), advise_journal_max_batch(get_jp_journal_max_trans_len (sb_jp(sb))));
 	    set_jp_journal_max_batch (sb_jp(sb), advise_journal_max_batch(get_jp_journal_max_trans_len (sb_jp(sb))));
        }
        if (get_jp_journal_max_commit_age (sb_jp(sb)) != advise_journal_max_commit_age()) {
 	    fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal  max commit age occured (%lu), fixed (%d)\n",
 	        get_jp_journal_max_commit_age (sb_jp(sb)), advise_journal_max_commit_age());
 	    set_jp_journal_max_commit_age (sb_jp(sb), advise_journal_max_commit_age());
        }
        if (get_jp_journal_max_trans_age (sb_jp(sb)) != advise_journal_max_trans_age()) {
 	    fsck_log ("rebuild-sb: wrong journal  max commit age occured (%lu), fixed (0)\n",
 	        get_jp_journal_max_trans_age (sb_jp(sb)), advise_journal_max_trans_age());
 	    set_jp_journal_max_trans_age (sb_jp(sb), advise_journal_max_trans_age());
        }

        
}
*/

void rebuild_sb (reiserfs_filsys_t * fs, char * filename, struct fsck_data * data)
{
    int version = 0;
    struct reiserfs_super_block * ondisk_sb = 0;
    struct reiserfs_super_block * sb = 0;
    struct reiserfs_journal_header *j_head;

    int magic_was_found = 0;
    unsigned long block_count = 0;
    __u16 p_oid_maxsize;
    unsigned int bmap_nr;
    __u32 p_jp_journal_1st_block = 0;
    __u32 p_jp_dev_size = 0;
    int standard_journal = -1;
    char * journal_dev_name = 0;
    char * tmp;
    int sb_size;

    char * answer = 0;
    size_t n = 0;
    struct stat stat_buf;
    int retval, exit_code = EXIT_OK;

    if (!no_reiserfs_found (fs)) {
        sb = getmem (sizeof (*sb));
        if (!is_opened_rw (fs)) {
            close (fs->fs_dev);
            fs->fs_dev = open (fs->fs_file_name, O_RDWR | O_LARGEFILE);
        }

	if (!is_blocksize_correct (fs->fs_blocksize)) {
	    printf("\nCannot find a proper blocksize, enter block size [4096]: \n");
	    getline (&answer, &n, stdin);
	    if (strcmp(answer, "\n")) {
		retval = (int) strtol (answer, &tmp, 0);
		if ((*tmp && strcmp(tmp, "\n")) || retval < 0)
		    reiserfs_exit (EXIT_USER, "rebuild_sb: wrong block size specified\n");
		if (!is_blocksize_correct (retval))
		    reiserfs_exit (EXIT_USER, "rebuild_sb: wrong block size specified, "
			"only power of 2 from 512-8192 interval are supported.\n");
	    } else
		retval = 4096;
	
	    fs->fs_blocksize = retval;
	}

        if (!(block_count = count_blocks (filename, fs->fs_blocksize)))
		exit(EXIT_OPER);

        /* save ondisk_sb somewhere and work in temp area */
        ondisk_sb = fs->fs_ondisk_sb;
        memcpy (sb, fs->fs_ondisk_sb, sizeof (*sb));
        fs->fs_ondisk_sb = sb;

        if (is_reiserfs_3_6_magic_string (sb)) {
            /* 3_6 magic */
            if (fsck_data (fs)->journal_dev_name)
                /* journal dev must not be specified with standard journal */
                reiserfs_exit (EXIT_USER, "ReiserFS with default journal "
		    "is found, but there was specified a journal device.");

            if (fs->fs_super_bh->b_blocknr ==
		REISERFS_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                version = 1;
	    else if (fs->fs_super_bh->b_blocknr ==
		REISERFS_OLD_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                version = 3;
	    
            magic_was_found = 2;
        } else if (is_reiserfs_3_5_magic_string (sb)) {
            if (fsck_data (fs)->journal_dev_name)
                /* journal dev must not be specified with standard journal */
                reiserfs_exit (EXIT_USER, "ReiserFS with default journal "
		    "is found, but there was specified a journal device.");

            /* 3_5 magic */
            if (fs->fs_super_bh->b_blocknr ==
		REISERFS_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                version = 2;
	    else if (fs->fs_super_bh->b_blocknr ==
		REISERFS_OLD_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                version = 4;
	    
	    magic_was_found = 1;
        } else if (is_reiserfs_jr_magic_string (sb)) {
            if (!fsck_data (fs)->journal_dev_name && !fsck_skip_journal(fs))
                /* journal dev must be specified with non standard journal */
                reiserfs_exit (EXIT_USER, "ReiserFS with non default journal "
		    "is found, but there was not specified any journal device.");

            if (get_sb_version (sb) == REISERFS_FORMAT_3_6) {
                /*non-standard magic + sb_format == 3_6*/
		if (fs->fs_super_bh->b_blocknr ==
		    REISERFS_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                    version = 1;
		else if (fs->fs_super_bh->b_blocknr == 
		    REISERFS_OLD_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                    version = 3;
		
                magic_was_found = 3;
            } else if (get_sb_version (sb) == REISERFS_FORMAT_3_5) {
                /* non-standard magic + sb_format == 3_5 */
                if (fs->fs_super_bh->b_blocknr ==
		    REISERFS_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                    version = 2;
		else if (fs->fs_super_bh->b_blocknr ==
		    REISERFS_OLD_DISK_OFFSET_IN_BYTES / fs->fs_blocksize)
                    version = 4;
		
                magic_was_found = 3;
            } else {
                /* non-standard magic + bad sb_format */
                version = 0;
                magic_was_found = 3;
            }
        } else
            reiserfs_exit (EXIT_USER, "We opened device but there is no magic "
		"and there is no correct superblock format found.");

        if (magic_was_found == 1 || magic_was_found == 2)
            standard_journal = 1;
        else
            standard_journal = 0;

        if (version == 0)
            version = what_fs_version ();

        if (get_sb_block_count (sb) != block_count) {
            do {
                printf("\nDid you use resizer(y/n)[n]: ");
                getline (&answer, &n, stdin);
            } while(strcmp ("y\n", answer) && 
		    strcmp ("n\n", answer) && 
		    strcmp ("\n", answer));

            if (!strcmp ("y\n", answer)) {
                printf("\nEnter partition size [%lu]: ", block_count);
                getline (&answer, &n, stdin);
                if (strcmp ("\n", answer))
                    block_count = atoi (answer);
            } else {
                fsck_conditional_log (magic_was_found, "rebuild-sb: wrong block count "
		    "occured (%lu), fixed (%lu)\n", get_sb_block_count(sb), block_count);
            }

	    set_sb_block_count (sb, block_count);
        }

        if (get_sb_block_size (sb) != fs->fs_blocksize) {
            fsck_log("rebuild-sb: wrong block size occured (%lu), fixed (%lu)\n", 
		    get_sb_block_size (sb), fs->fs_blocksize);
  	    set_sb_block_size (sb, fs->fs_blocksize);
        }
    }

    /* if no reiserfs_found or bad data found in that SB, what was checked in previous 
     * clause */
    if (no_reiserfs_found (fs)) {
        int fd;

        fd = open (filename, O_RDWR | O_LARGEFILE);

        if (fd == -1) {
            reiserfs_exit (EXIT_OPER, "rebuils_sb: cannot open device %s", 
		filename);
	}

        version = what_fs_version ();

        if (version == 3 || version == 4) {
            retval = 4096;
        } else {
	    printf("\nEnter block size [4096]: \n");
	    getline (&answer, &n, stdin);
	    if (strcmp(answer, "\n")) {
		retval = (int) strtol (answer, &tmp, 0);
		if ((*tmp && strcmp(tmp, "\n")) || retval < 0)
		    reiserfs_exit (EXIT_USER, "rebuild_sb: wrong block size specified\n");
		if (!is_blocksize_correct (retval))
		    reiserfs_exit (EXIT_USER, "rebuild_sb: wrong block size specified, "
			"only divisible by 1024 are supported currently\n");
	    } else
		retval = 4096;
	}

        if (!(block_count = count_blocks (filename, retval)))
		exit(EXIT_OPER);

        switch(version){
        case 1:
            fs = reiserfs_create (filename, REISERFS_FORMAT_3_6, block_count, retval, 1, 1);
            break;
        case 2:
            fs = reiserfs_create (filename, REISERFS_FORMAT_3_5, block_count, retval, 1, 1);
            break;
        case 3:
            fs = reiserfs_create (filename, REISERFS_FORMAT_3_6, block_count, retval, 1, 0);
            break;
        case 4:
            fs = reiserfs_create (filename, REISERFS_FORMAT_3_5, block_count, retval, 1, 0);
            break;
        }

	if (fs == NULL)
	    return;
	
        sb = fs->fs_ondisk_sb;
        fs->fs_vp = data;

        if (!fsck_skip_journal (fs)) {
            if (!fsck_data (fs)->journal_dev_name) {
                do {
                    printf("\nNo journal device was specified. (If journal is not "
			"available, re-run with --no-journal-available option specified).\n"
                        "Is journal default? (y/n)[y]: ");
		    
                    getline (&answer, &n, stdin);
                } while(strcmp ("y\n", answer) && 
			strcmp ("n\n", answer) && 
			strcmp ("\n", answer));
		
                if (!strcmp ("n\n", answer)) {
                    printf("\nSpecify journal device with -j option.\n");
                    exit(EXIT_USER);
                }
                standard_journal = 1;
            } else {
                standard_journal = 0;
                memcpy (fs->fs_ondisk_sb->s_v1.s_magic, REISERFS_JR_SUPER_MAGIC_STRING,
                    strlen (REISERFS_JR_SUPER_MAGIC_STRING));
            }
        }

        do {
            printf("\nDid you use resizer(y/n)[n]: ");
            getline (&answer, &n, stdin);
        } while (strcmp ("y\n", answer) && strcmp ("n\n", answer) && strcmp ("\n", answer));
        if (!strcmp ("y\n", answer)) {
            printf("\nEnter partition size [%lu]: ", block_count);
            getline (&answer, &n, stdin);
            if (strcmp ("\n", answer))
                block_count = atoi (answer);
            set_sb_block_count (sb, block_count);
        }
	
	set_sb_fs_state (sb, FS_ERROR);
    }


    if (version == 1 || version == 3) {
        if (get_reiserfs_format (sb) != REISERFS_FORMAT_3_6) {
            fsck_log("rebuild-sb: wrong reiserfs version occured (%lu), fixed (%lu)\n", 
		    get_reiserfs_format (sb), REISERFS_FORMAT_3_6);
            set_sb_version (sb, REISERFS_FORMAT_3_6);
        }
    } else if (version == 2 || version == 4) {
        if (get_reiserfs_format (sb) != REISERFS_FORMAT_3_5) {
            fsck_log("rebuild-sb: wrong reiserfs version occured (%lu), fixed (%lu)\n", 
		    get_reiserfs_format (sb), REISERFS_FORMAT_3_5);
            set_sb_version (sb, REISERFS_FORMAT_3_5);
        }
    }

    p_oid_maxsize = (fs->fs_blocksize - reiserfs_super_block_size (sb)) / 
	sizeof(__u32) / 2 * 2;
    
    if (get_sb_oid_maxsize (sb) != p_oid_maxsize) {
	fsck_log("rebuild-sb: wrong objectid map max size occured (%lu), fixed (%lu)\n", 
		get_sb_oid_maxsize (sb), p_oid_maxsize);
	set_sb_oid_maxsize (sb, p_oid_maxsize);
    }

    bmap_nr = reiserfs_fs_bmap_nr(fs);

    if (reiserfs_bmap_over(bmap_nr) && get_sb_bmap_nr(sb) != 0) {
	fsck_log("rebuild-sb: wrong bitmap number occured (%u), fixed (0) "
	         "(really %u)\n", get_sb_bmap_nr (sb), bmap_nr);
	set_sb_bmap_nr (sb, 0);
    } else if (get_sb_bmap_nr(sb) != bmap_nr) {
	fsck_log("rebuild-sb: wrong bitmap number occured (%u), "
		 "fixed (%u)\n", get_sb_bmap_nr (sb), bmap_nr);
	set_sb_bmap_nr (sb, bmap_nr);
    }

    if (get_sb_root_block (sb) > block_count) {
	fsck_log("rebuild-sb: wrong root block occured (%lu), zeroed\n", 
		get_sb_root_block (sb));
	set_sb_root_block (sb, 0);
    }

    if (get_sb_free_blocks (sb) > block_count) {
	fsck_log ("rebuild-sb: wrong free block count occured (%lu), zeroed\n", 
		get_sb_free_blocks (sb));
        set_sb_free_blocks (sb, 0);
    }

    if (get_sb_umount_state (sb) != FS_CLEANLY_UMOUNTED && 
	get_sb_umount_state (sb) != FS_NOT_CLEANLY_UMOUNTED) 
    {
	fsck_conditional_log (magic_was_found, "rebuild-sb: wrong umount state (%u), "
	    "fixed to (FS_NOT_CLEANLY_UMOUNTED)\n", get_sb_umount_state (sb));
        set_sb_umount_state (sb, FS_NOT_CLEANLY_UMOUNTED);
    }

    if (get_sb_oid_cursize (sb) == 1 || 
	get_sb_oid_cursize (sb) > get_sb_oid_maxsize (sb)) 
    {
        fsck_log("rebuild-sb: wrong objectid map occured (%lu), zeroed\n", 
	    get_sb_oid_cursize (sb));
	
        set_sb_oid_cursize (sb, 0);
    }

    if ( get_sb_tree_height (sb) &&
        ((get_sb_tree_height (sb) < DISK_LEAF_NODE_LEVEL + 1) ||
	(get_sb_tree_height (sb) > MAX_HEIGHT)) ) {
	fsck_log("rebuild-sb: wrong tree height occured (%u), zeroed\n", 
	    get_sb_tree_height (sb));

	set_sb_tree_height (sb, 0);
    }

    if (get_sb_hash_code (sb) && code2name (get_sb_hash_code (sb)) == 0) {
	fsck_log("rebuild-sb: wrong hash occured (%lu), zeroed\n", 
	    get_sb_hash_code (sb));
	
	set_sb_hash_code (sb, 0);
    }

    if (version == 1 || version == 3) {
#if defined(HAVE_LIBUUID) && defined(HAVE_UUID_UUID_H)
        if (uuid_is_null(sb->s_uuid)) {
	    uuid_generate(sb->s_uuid);
	    fsck_log ("rebuild-sb: no uuid found, a new uuid was "
		      "generated (%U)\n", sb->s_uuid);
        }
#endif
	if (sb->s_flags != 0 && sb->s_flags != 1) {
	    fsck_log ("rebuild-sb: super block flags found (%u), zeroed\n",
                  sb->s_flags);
	    sb->s_flags = 0;
	}
    }


    /*
    if we have a standard journal
        reserved = 0
        dev - same
        size = journal_default_size(fs->fs_super_bh->b_blocknr, fs)
        offset = journal_default_size(fs)
    if we have a non standard journal
        if we found magic string
            try to find a jhead and comare dev, size, offset there
            if params are not equal move to "if we did not find a magic string" clause
        if we did not find a magic string
            ask user about his journal
            try to find a jhead and comare dev, size, offset there
            if params are not equal exit with error
    */


    p_jp_journal_1st_block = get_journal_start_must (fs);

    if (standard_journal == 1) {
	if (get_jp_journal_dev (sb_jp(sb)) != 0) {
 	    fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal device "
		"occured (%lu), fixed (0)\n", get_jp_journal_dev (sb_jp(sb)));
 	    set_jp_journal_dev (sb_jp(sb), 0);
        }
        if (get_sb_reserved_for_journal (sb) != 0) {
 	    fsck_log ("rebuild-sb: wrong size reserved for default journal occured "
		"(%lu), fixed (0)\n", get_sb_reserved_for_journal (sb));
            set_sb_reserved_for_journal (sb, 0);
        }
        if (get_jp_journal_1st_block (sb_jp(sb)) != p_jp_journal_1st_block) {
            fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal first "
		"block occured (%lu), fixed (%lu)\n", get_jp_journal_1st_block (sb_jp(sb)),
		p_jp_journal_1st_block);
	    
            set_jp_journal_1st_block (sb_jp(sb) , p_jp_journal_1st_block);
        }
        if (get_jp_journal_size (sb_jp(sb)) != 
	    journal_default_size(fs->fs_super_bh->b_blocknr, fs->fs_blocksize)) 
	{
 	    fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal size "
		"occured (%lu), fixed (%lu)\n", get_jp_journal_size (sb_jp(sb)) + 1,
 	        journal_default_size (fs->fs_super_bh->b_blocknr, 
		fs->fs_blocksize) + 1);
	    
            set_jp_journal_size (sb_jp(sb), 
		journal_default_size (fs->fs_super_bh->b_blocknr, fs->fs_blocksize));
        }

	if ((retval = reiserfs_open_journal(fs, filename, O_RDWR | O_LARGEFILE))) {
	    fsck_log("\nrebuild-sb: Failed to open the journal device (%s).\n", 
		filename);

	    exit(retval < 0 ? EXIT_OPER : EXIT_USER);
	}	
    } else if (!fsck_skip_journal(fs)) {
	/* Check that specified non-standard journal device exists. */
	    
	journal_dev_name = fsck_data (fs)->journal_dev_name;	    
	retval = stat(journal_dev_name, &stat_buf);
	    
	if (retval == -1)
	    reiserfs_exit (EXIT_USER, "rebuild_sb: error while detecting the "
		"specified journal device (%s): %s\n", journal_dev_name,
		strerror(errno));
	
	retval = 0;
	if (magic_was_found) {
	    /* Super block was found. Try to open the journal on the base of its 
	     * journal parameters. */
	    
	    retval = reiserfs_open_journal(fs, journal_dev_name, 
		O_RDWR | O_LARGEFILE);
	    
	    if (retval == 0) {
		j_head = (struct reiserfs_journal_header *)(fs->fs_jh_bh->b_data);
		retval = memcmp(&j_head->jh_journal, sb_jp(sb), 
		    sizeof(struct journal_params));
	    
		if (retval) {
		    /* journal parameters from the SB and from the J_Header does not 
		     * match. Close the jouranl, ask the user about correct journal 
		     * parameters. */
		    reiserfs_close_journal(fs);
		}
	    }

	    if (!reiserfs_journal_opened(fs)) {
		fsck_log ("Journal cannot be opened, assuming specified "
			  "journal device is correct\n");
	    }
	}
	
	if (!reiserfs_journal_opened(fs)) {
	    __u64 default_value;

	    /* journal was not found or SB and J_Header parameters does not match. */
	    if (magic_was_found == 0)
                default_value = (!strcmp(fs->fs_file_name, journal_dev_name)) ? 
		    p_jp_journal_1st_block : 0;
            else
                default_value = get_jp_journal_1st_block (sb_jp(sb));

            printf("\nEnter journal offset on %s in blocks [%Lu]: \n",
            		journal_dev_name, (unsigned long long)default_value);

            getline (&answer, &n, stdin);
            if (strcmp(answer, "\n")) {
                retval = (int) strtol (answer, &tmp, 0);
                if ((*tmp && strcmp(tmp, "\n")) || retval < 0)
                    reiserfs_exit(EXIT_USER, "rebuild_sb: wrong offset specified\n");

                set_jp_journal_1st_block (sb_jp(sb), retval);
            } else
                set_jp_journal_1st_block (sb_jp(sb), default_value);

            if (!(p_jp_dev_size = count_blocks (journal_dev_name, fs->fs_blocksize)))
		    exit(EXIT_OPER);

            /* some checks for journal offset */
            if (strcmp(fs->fs_file_name, journal_dev_name) != 0) {
                if (p_jp_dev_size < get_jp_journal_1st_block (sb_jp(sb)) + 1)
        	    reiserfs_exit(EXIT_USER, "rebuild_sb: offset is much than device size\n");
            }

            /* default size if magic was not found is device size - journal_1st_block;
               default size if magic was found is found value + 1 block for journal 
	       header */
            if (magic_was_found == 0)
                default_value = (!strcmp(fs->fs_file_name, journal_dev_name)) ?
                    journal_default_size (fs->fs_super_bh->b_blocknr,
					  fs->fs_blocksize) + 1 :
                    p_jp_dev_size - get_jp_journal_1st_block (sb_jp(sb));
            else
                default_value = get_jp_journal_size (sb_jp(sb)) + 1;
		

            printf("\nEnter journal size (including 1 block for journal header) on "
		"%s in blocks [%Lu]: \n", journal_dev_name, 
		(unsigned long long)default_value);

            getline (&answer, &n, stdin);
            if (strcmp(answer, "\n")) {
                retval = (int) strtol (answer, &tmp, 0);
                if ((*tmp && strcmp(tmp, "\n")) || retval < 0)
        	    reiserfs_exit(EXIT_USER, "rebuild_sb: wrong offset specified\n");

                set_jp_journal_size (sb_jp(sb), retval - 1);
            } else {
                set_jp_journal_size (sb_jp(sb), default_value - 1);
            }

            /* some checks for journal size */
            if (get_jp_journal_size (sb_jp(sb)) +
                get_jp_journal_1st_block (sb_jp(sb)) + 1 > p_jp_dev_size)
        	    reiserfs_exit(EXIT_USER, "rebuild_sb: journal offset + journal size is "
			"greater than device size\n");
            
	    /* some checks for journal size */
            if (get_jp_journal_size (sb_jp(sb)) < JOURNAL_MIN_SIZE)
        	    reiserfs_exit(EXIT_USER, "rebuild_sb: journal size cannot be less than "
			"%lu blocks.\n", JOURNAL_MIN_SIZE + 1);

	    if ((retval = reiserfs_open_journal(fs, journal_dev_name, 
		O_RDWR | O_LARGEFILE)))
	    {
		fsck_log("\nrebuild-sb: Failed to open a journal device (%s).", 
		    journal_dev_name);
		
		exit(retval < 0 ? EXIT_OPER : EXIT_USER);
	    }
	
	    /* SB was found, but journal params were broken and have been recovered. 
	     * Futher work goes as SB would not be found. */
	    magic_was_found = 0;
	}
	
	if (strcmp (fs->fs_file_name, journal_dev_name))
	    set_jp_journal_dev (sb_jp(sb), stat_buf.st_rdev);
	else
	    set_jp_journal_dev (sb_jp(sb), 0);

    } else {
	fsck_log ("\nJournal was specified as not available. reiserfstune is "
	    "needed.\n\n");
	
	set_jp_journal_magic (sb_jp(sb), NEED_TUNE);
    }

    if (reiserfs_journal_opened(fs)) {
	/* Journal was openned. Check/fix journal parameters and copy it the journal 
	 * header. */
	
        if (get_jp_journal_max_trans_len (sb_jp(sb)) !=
	    advise_journal_max_trans_len(   get_jp_journal_max_trans_len (sb_jp(sb)),
					    get_jp_journal_size (sb_jp(sb)), 
					    fs->fs_blocksize, 0))
	{
 	    fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal max "
		"transaction length occured (%lu), fixed (%d)\n",
		get_jp_journal_max_trans_len (sb_jp(sb)),
		advise_journal_max_trans_len (	get_jp_journal_max_trans_len (sb_jp(sb)),
        					get_jp_journal_size (sb_jp(sb)),
        					fs->fs_blocksize, 0));
	    
 	    set_jp_journal_max_trans_len (sb_jp(sb),
 	    	advise_journal_max_trans_len (	get_jp_journal_max_trans_len (sb_jp(sb)),
						get_jp_journal_size (sb_jp(sb)),
 	    					fs->fs_blocksize, 0));
        }
	
        if (get_jp_journal_max_batch (sb_jp(sb)) != 
	    advise_journal_max_batch(get_jp_journal_max_trans_len (sb_jp(sb)))) 
	{
 	    fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal max "
		"batch size occured (%lu), fixed (%d)\n", 
		get_jp_journal_max_batch (sb_jp(sb)), 
		advise_journal_max_batch(get_jp_journal_max_trans_len (sb_jp(sb))));
	    
 	    set_jp_journal_max_batch (sb_jp(sb), 
		advise_journal_max_batch(get_jp_journal_max_trans_len (sb_jp(sb))));
        }

        if (get_jp_journal_max_commit_age (sb_jp(sb)) != 
	    advise_journal_max_commit_age()) 
	{
 	    fsck_conditional_log (magic_was_found, "rebuild-sb: wrong journal "
		"max commit age occured (%lu), fixed (%d)\n", 
 	        get_jp_journal_max_commit_age (sb_jp(sb)), advise_journal_max_commit_age());
	    
 	    set_jp_journal_max_commit_age (sb_jp(sb), advise_journal_max_commit_age());
        }
	
        if (get_jp_journal_max_trans_age (sb_jp(sb)) != advise_journal_max_trans_age()) {
 	    fsck_log ("rebuild-sb: wrong journal  max commit age occured (%u), "
		"fixed (%u)\n", get_jp_journal_max_trans_age (sb_jp(sb)), 
		advise_journal_max_trans_age());
	    
 	    set_jp_journal_max_trans_age (sb_jp(sb), advise_journal_max_trans_age());
        }
		
	j_head = (struct reiserfs_journal_header *)(fs->fs_jh_bh->b_data);

	if (standard_journal == 0) {
	    if (get_jp_journal_magic (sb_jp(sb)) == 0 || 
		get_jp_journal_magic (sb_jp(sb)) == NEED_TUNE) 
	    {
		int magic;
		
		magic = random();
		fsck_log ("rebuild-sb: genarate the new journal magic (%d)\n", magic);
		set_jp_journal_magic (sb_jp(sb), magic);
		set_jp_journal_magic (&j_head->jh_journal, magic);

	    }
	}
	
	retval = memcmp(&j_head->jh_journal, sb_jp(sb), sizeof(struct journal_params));
	
	if (retval) {
	    if (standard_journal == 1) {
		fsck_log("\nrebuild-sb: You either have a corrupted journal or have just "
		    "changed\nthe start of the partition with some partition table editor. "
		    "If you are\nsure that the start of the partition is ok, rebuild the "
		    "journal header.\n");
	    } else if (!magic_was_found) {
		fsck_log("\nrebuild-sb: journal header is not found. You either have "
		    "a corrupted,\nbad configured(device/offset/size), not available "
		    "journal or have just changed\nthe start of the journal partition "
		    "with some partition table editor. In the \ncase of corrupted "
		    "journal you need to use --no-journal-available. If you are\n"
		    "sure that the start of the partition is ok and journal is "
		    "available, rebuild\nthe journal header.\n");
	    }
	    
	    if (standard_journal || !magic_was_found) {
		if (!user_confirmed (stdout, "Do you want to rebuild the journal header? "
		    "(y/n)[n]: ", "y\n"))
		{
		    exit(EXIT_USER);
		} else 
		    exit_code = EXIT_FIXED;
	    }
	    
	    memcpy(&j_head->jh_journal, sb_jp(sb), sizeof(struct journal_params));
	    mark_buffer_dirty(fs->fs_jh_bh);
	    bwrite (fs->fs_jh_bh);
	}
    }
    
    /*  whether journal header contains params with the same dev, offset, size will be 
	checked in open_journal */

    if (version == 1 || version == 3)
        sb_size = SB_SIZE;
    else
        sb_size = SB_SIZE_V1;

    if (ondisk_sb == NULL || 
	memcmp(ondisk_sb, sb, sb_size - ((sb_size == SB_SIZE) ? 
	    sizeof(fs->fs_ondisk_sb->s_unused) : 0))) 
    {
        /* smth was changed in SB or a new one has been built */
	set_sb_fs_state (sb, get_sb_fs_state (sb) | FS_ERROR);
	
	if (ondisk_sb) {
	    /* if super_block was found, we keep sb in ondisk_sb */
	    fs->fs_ondisk_sb = ondisk_sb;
	    memcpy (ondisk_sb, sb, sb_size);
	    freemem(sb);
	}

	fflush(stdout); 
	print_block (stderr, fs, fs->fs_super_bh);
	
	if (user_confirmed (stderr, "Is this ok ? (y/n)[n]: ", "y\n")) {
	    mark_buffer_uptodate (fs->fs_super_bh, 1);
	    mark_buffer_dirty (fs->fs_super_bh);
	    bwrite (fs->fs_super_bh);
	    fsck_progress ("The fs may still be unconsistent. Run reiserfsck --check.\n\n");
	    exit_code = EXIT_FIXED;
	} else {
	    mark_buffer_clean (fs->fs_super_bh);
	    fsck_progress ("Super block was not written\n");
	}
    } else {
	print_block (stderr, fs, fs->fs_super_bh);
	
	mark_buffer_clean (fs->fs_super_bh);
	fsck_progress ("\nSuper block seems to be correct\n\n");
    }

    exit(exit_code);
}

/*	if (version == 0) {
	    brelse (fs->fs_super_bh);
            freemem (fs);
            close (fs->fs_dev);
            fs = NULL;
	}
*/