static int sfs_fill_super(struct super_block *sb, void *data, int silent)
{
sfs_info_t *info;
printk(KERN_INFO "sfs: sfs_fill_super\n");
if (!(info = (sfs_info_t *)(kzalloc(sizeof(sfs_info_t), GFP_KERNEL))))
return -ENOMEM;
info->vfs_sb = sb;
if (init_browsing(info) < 0)
{
kfree(info);
return -EIO;
}
/* Updating the VFS super_block */
sb->s_magic = info->sb.type;
sb->s_blocksize = info->sb.block_size;
sb->s_blocksize_bits = get_bit_pos(info->sb.block_size);
sb->s_type = &sfs; // file_system_type
sb->s_op = &sfs_sops; // super block operations
sfs_root_inode = iget_locked(sb, ROOT_INODE_NUM); // obtain an inode from VFS
if (!sfs_root_inode)
{
shut_browsing(info);
kfree(info);
return -EACCES;
}
if (sfs_root_inode->i_state & I_NEW) // allocated fresh now
{
printk(KERN_INFO "sfs: Got new root inode, let's fill in\n");
sfs_root_inode->i_op = &sfs_iops; // inode operations
sfs_root_inode->i_mode = S_IFDIR | S_IRWXU | S_IRWXG | S_IRWXO;
sfs_root_inode->i_fop = &sfs_fops; // file operations
sfs_root_inode->i_mapping->a_ops = &sfs_aops; // address operations
unlock_new_inode(sfs_root_inode);
}
else
{
printk(KERN_INFO "sfs: Got root inode from inode cache\n");
}
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,4,0))
sb->s_root = d_alloc_root(sfs_root_inode);
#else
sb->s_root = d_make_root(sfs_root_inode);
#endif
if (!sb->s_root)
{
iget_failed(sfs_root_inode);
shut_browsing(info);
kfree(info);
return -ENOMEM;
}
return 0;
}
static void sfs_kill_sb(struct super_block *sb)
{
sfs_info_t *info = (sfs_info_t *)(sb->s_fs_info);
if (info)
{
shut_browsing(info);
kfree(info);
}
kill_block_super(sb);
}
void browse_sfs(int sfs_handle)
{
int done;
char cmd[256], *fn;
int ret, perm;
done = 0;
printf("Welcome to SFS Browsing Shell v3.0\n\n");
printf("Block size : %d bytes\n", sb.block_size);
printf("Partition size : %d blocks\n", sb.partition_size);
printf("File entry size: %d bytes\n", sb.entry_size);
printf("Entry tbl size : %d blocks\n", sb.entry_table_size);
printf("Entry count : %d\n", sb.entry_count);
printf("\n");
init_browsing(sfs_handle);
while (!done)
{
printf(" $> ");
ret = scanf("%[^\n]", cmd);
if (ret < 0)
{
done = 1;
printf("\n");
continue;
}
else
{
getchar();
if (ret == 0) continue;
}
if (strcmp(cmd, "?") == 0)
{
usage();
continue;
}
else if (strcmp(cmd, "quit") == 0)
{
done = 1;
continue;
}
else if (strcmp(cmd, "list") == 0)
{
sfs_list(sfs_handle);
continue;
}
else if (strncmp(cmd, "create", 6) == 0)
{
if (cmd[6] == ' ')
{
fn = cmd + 7;
while (*fn == ' ') fn++;
if (*fn != '\0')
{
sfs_create(sfs_handle, fn);
continue;
}
}
}
else if (strncmp(cmd, "remove", 6) == 0)
{
if (cmd[6] == ' ')
{
fn = cmd + 7;
while (*fn == ' ') fn++;
if (*fn != '\0')
{
sfs_remove(sfs_handle, fn);
continue;
}
}
}
else if (strncmp(cmd, "chperm", 6) == 0)
{
if (cmd[6] == ' ')
{
perm = cmd[7] - '0';
if ((0 <= perm) && (perm <= 7) && (cmd[8] == ' '))
{
fn = cmd + 9;
while (*fn == ' ') fn++;
if (*fn != '\0')
{
sfs_chperm(sfs_handle, fn, perm);
continue;
}
}
}
}
else if (strncmp(cmd, "read", 4) == 0)
{
if (cmd[4] == ' ')
{
fn = cmd + 5;
while (*fn == ' ') fn++;
if (*fn != '\0')
{
sfs_read(sfs_handle, fn);
continue;
}
}
}
else if (strncmp(cmd, "write", 5) == 0)
{
if (cmd[5] == ' ')
{
fn = cmd + 6;
while (*fn == ' ') fn++;
if (*fn != '\0')
{
sfs_write(sfs_handle, fn);
continue;
}
}
}
printf("Unknown/Incorrect command: %s\n", cmd);
usage();
}
shut_browsing(sfs_handle);
}