mountdata.c

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#include <linux/module.h>
#include <linux/ctype.h>
#include <linux/parser.h>
#include <linux/seq_file.h>
#include <linux/slab.h>

#include "mountdata.h"
#include "storage.h"
#include "cache.h"



enum
{
    OPT_MAX_BLOCK_SIZE,     
    OPT_MAX_ENTRIES,        
    OPT_ERROR               
};


static match_table_t    tokens =
{
    {OPT_MAX_BLOCK_SIZE,    "max_block_size=%u"},
    {OPT_MAX_ENTRIES,       "max_entries=%u"},
    {OPT_ERROR,             NULL}
};



int mumufs_parse_opt( char *                      opt,
                      struct mumu_mount_data *    d )
{
    char *      p;

    d->max_block_size = DEFAULTMAXBLOCKSIZE;
    d->max_entries    = DEFAULTMAXENTRIES;

    while ( (p = strsep( &opt, "," )) != NULL )
    {
        int             token;
        int             value;
        substring_t     args[ MAX_OPT_ARGS ];


        if ( !*p )      continue;

        token = match_token( p, tokens, args );
        switch ( token )
        {
            case OPT_MAX_BLOCK_SIZE:
                if ( match_int( &args[0], &value ) )    return 0;
                d->max_block_size = value;
                break;

            case OPT_MAX_ENTRIES:
                if ( match_int( &args[0], &value ) )    return 0;
                d->max_entries = value;
                break;

            default:
                return 0;
        }
    }

    return 1;
}



int mumufs_show_options( struct seq_file *    m,
                         struct vfsmount *    mnt )
{
    struct mumu_mount_data *    d = (struct mumu_mount_data *)( mnt->mnt_sb->s_fs_info );

    seq_printf( m, ",max_block_size=%u", d->max_block_size );
    seq_printf( m, ",max_entries=%u", d->max_entries );

    return 0;
}




int mumufs_init_mount_data( struct mumu_mount_data *  d )
{
    d->mount = NULL;
    atomic_set( & d->number_of_entries, 0 );
    return 0;
}



int mumufs_umount_cleanup( struct super_block *  sb )
{
    struct mumu_mount_data *    d = (struct mumu_mount_data *)( sb->s_fs_info );

    d->mount = NULL;
    return 0;
}