80 lines
1.7 KiB
C++
80 lines
1.7 KiB
C++
|
#include "File.h"
|
||
|
|
#include "Inode.h"
|
||
|
|
#include "FileDescriptor.h"
|
||
|
|
#include "assert.h"
|
||
|
|
#include "Superblock.h"
|
||
|
|
#include "FileSystemType.h"
|
||
|
|
|
||
|
|
|
||
|
|
File::File(Inode* inode, Dentry* dentry, uint32 flag) :
|
||
|
|
uid(0), gid(0), version(0), f_superblock_(0), f_inode_(inode), f_dentry_(dentry), flag_(flag)
|
||
|
|
{
|
||
|
|
f_inode_->incRefCount();
|
||
|
|
}
|
||
|
|
|
||
|
|
File::~File()
|
||
|
|
{
|
||
|
|
debug(VFS_FILE, "Destroying file\n");
|
||
|
|
|
||
|
|
assert(f_fds_.empty() && "File to be destroyed still has open file descriptors");
|
||
|
|
assert(f_inode_);
|
||
|
|
|
||
|
|
if(!f_inode_->decRefCount())
|
||
|
|
{
|
||
|
|
debug(VFS_FILE, "No more references to %s inode %p left after closing file, deleting\n",
|
||
|
|
f_inode_->getSuperblock()->getFSType()->getFSName(), f_inode_);
|
||
|
|
f_inode_->getSuperblock()->deleteInode(f_inode_);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
uint32 File::getSize()
|
||
|
|
{
|
||
|
|
return f_inode_->getSize();
|
||
|
|
}
|
||
|
|
|
||
|
|
l_off_t File::lseek(l_off_t offset, uint8 origin)
|
||
|
|
{
|
||
|
|
if (origin == SEEK_SET)
|
||
|
|
offset_ = offset;
|
||
|
|
else if (origin == SEEK_CUR)
|
||
|
|
offset_ += offset;
|
||
|
|
else if (origin == SEEK_END)
|
||
|
|
offset_ = f_inode_->getSize() + offset;
|
||
|
|
else
|
||
|
|
return -1;
|
||
|
|
|
||
|
|
return offset_;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
FileDescriptor* File::openFd()
|
||
|
|
{
|
||
|
|
debug(VFS_FILE, "Open new file descriptor\n");
|
||
|
|
FileDescriptor* fd = new FileDescriptor(this);
|
||
|
|
f_fds_.push_back(fd);
|
||
|
|
|
||
|
|
debug(VFS_FILE, "New file descriptor num: %u\n", fd->getFd());
|
||
|
|
return fd;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
int File::closeFd(FileDescriptor* fd)
|
||
|
|
{
|
||
|
|
debug(VFS_FILE, "Close file descriptor num %u\n", fd->getFd());
|
||
|
|
assert(fd);
|
||
|
|
|
||
|
|
f_fds_.remove(fd);
|
||
|
|
delete fd;
|
||
|
|
|
||
|
|
// Release on last fd removed
|
||
|
|
if(f_fds_.empty())
|
||
|
|
{
|
||
|
|
debug(VFS_FILE, "Releasing file\n");
|
||
|
|
return getInode()->release(this); // Will delete this file object
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|