/*
新建文件：
1.分配inode，设置imap
2.分配data_sector,设置smap
3.新建目录项，更新目录项内容（inode_index,filename）
4.新建inode，更新inode的内容
*/
static int create_file(const char *dir_name,const char *file_name,int file_type){
int inode_index=alloc_imap_bit(0);
if(inode_index<0){
set_error_index(IMAP_NOT_ENOUGH);
return -1;
}
#ifdef DEBUG_FS
printl("inode_index=%d(in create_file)\n",inode_index);
#endif
int data_index=alloc_smap_bit(0,DEFAULT_FILE_SECTOR_LENGTH);//相对于数据区的sector_index
if(data_index<0){
set_error_index(SMAP_NOT_ENOUGH);
return -1;
}
#ifdef DEBUG_FS
printl("data_index=%d(in create_file)\n",data_index);
#endif
data_index+=get_data_block_first_index(super_block);//绝对sector_index
#ifdef DEBUG_FS
printl("data_index=%d(in create_file)\n",data_index);
#endif
if(!new_dir_entry(dir_name,inode_index,file_name)){
set_error_index(DIR_CREATE_ERROR);
return -1;
}
if(!new_inode(inode_index,file_type,data_index,DEFAULT_FILE_SECTOR_LENGTH)){
set_error_index(INODE_CREATE_ERROR);
return -1;
}
return inode_index;
}
PRIVATE struct inode* create_file(char* path, int flags) {
char filename[MAX_PATH];
struct inode* dir_inode;
if (strip_path(filename, path, &dir_inode) != 0)
return 0;
int inode_nr = alloc_imap_bit(dir_inode -> i_dev);
int free_sect_nr = alloc_smap_bit(dir_inode -> i_dev, NR_DEFAULT_FILE_SECTS);
struct inode* nd = new_inode(dir_inode -> i_dev, inode_nr, free_sect_nr);
new_dir_entry(dir_inode, nd -> i_num, filename);
return nd;
}
/**************************************************************************************************
* create_file
**************************************************************************************************
* Create a file and return it's inode pointer.
*
* @param path The full path of the new file.
* @param flags Attributes of the new file.
*
* @return Pointer to inode of the new file if successed, otherwise 0.
*************************************************************************************************/
PRIVATE struct inode* create_file(char* path, int flags){
char filename[MAX_PATH];
struct inode* dir_inode;
if(strip_path(filename, path, &dir_inode) != 0){
return 0;
}
int nr_inode = alloc_imap_bit(dir_inode->i_dev);
/* one file at least is 1MB... */
int nr_free_sect = alloc_smap_bit(dir_inode->i_dev, NR_DEFAULT_FILE_SECTS);
struct inode* newino = new_inode(dir_inode->i_dev, nr_inode, nr_free_sect);
new_dir_entry(dir_inode, newino->i_num, filename);
return newino;
}
PRIVATE struct inode *creat_file(char *path, int flags)
{
char filename[MAX_PATH];
struct inode *dir_inode;
/* 准备好文件名和文件夹的 inode */
if (strip_path(filename, path, &dir_inode) != 0)
return 0;
/* 分配 inode */
int inode_nr = alloc_imap_bit(dir_inode->i_dev);
/* 分配 sector */
int free_sect_nr = alloc_smap_bit(dir_inode->i_dev, NR_DEFAULT_FILE_SECTS);
/* 在 inode array 中分配一个 inode */
struct inode *newino = new_inode(dir_inode->i_dev, inode_nr, free_sect_nr);
/* 新建一个目录项 */
new_dir_entry(dir_inode, newino->i_num, filename);
return newino;
}
