static status_t
ext2_open(fs_volume* _volume, fs_vnode* _node, int openMode, void** _cookie)
{
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
// opening a directory read-only is allowed, although you can't read
// any data from it.
if (inode->IsDirectory() && (openMode & O_RWMASK) != 0)
return B_IS_A_DIRECTORY;
status_t status = inode->CheckPermissions(open_mode_to_access(openMode)
| (openMode & O_TRUNC ? W_OK : 0));
if (status != B_OK)
return status;
// Prepare the cookie
file_cookie* cookie = new(std::nothrow) file_cookie;
if (cookie == NULL)
return B_NO_MEMORY;
ObjectDeleter<file_cookie> cookieDeleter(cookie);
cookie->open_mode = openMode & EXT2_OPEN_MODE_USER_MASK;
cookie->last_size = inode->Size();
cookie->last_notification = system_time();
MethodDeleter<Inode, status_t> fileCacheEnabler(&Inode::EnableFileCache);
if ((openMode & O_NOCACHE) != 0) {
status = inode->DisableFileCache();
if (status != B_OK)
return status;
fileCacheEnabler.SetTo(inode);
}
// Should we truncate the file?
if ((openMode & O_TRUNC) != 0) {
if ((openMode & O_RWMASK) == O_RDONLY)
return B_NOT_ALLOWED;
Transaction transaction(volume->GetJournal());
inode->WriteLockInTransaction(transaction);
status_t status = inode->Resize(transaction, 0);
if (status == B_OK)
status = inode->WriteBack(transaction);
if (status == B_OK)
status = transaction.Done();
if (status != B_OK)
return status;
// TODO: No need to notify file size changed?
}
fileCacheEnabler.Detach();
cookieDeleter.Detach();
*_cookie = cookie;
return B_OK;
}
static status_t
ext2_create(fs_volume* _volume, fs_vnode* _directory, const char* name,
int openMode, int mode, void** _cookie, ino_t* _vnodeID)
{
Volume* volume = (Volume*)_volume->private_volume;
Inode* directory = (Inode*)_directory->private_node;
TRACE("ext2_create()\n");
if (volume->IsReadOnly())
return B_READ_ONLY_DEVICE;
if (!directory->IsDirectory())
return B_BAD_TYPE;
TRACE("ext2_create(): Creating cookie\n");
// Allocate cookie
file_cookie* cookie = new(std::nothrow) file_cookie;
if (cookie == NULL)
return B_NO_MEMORY;
ObjectDeleter<file_cookie> cookieDeleter(cookie);
cookie->open_mode = openMode;
cookie->last_size = 0;
cookie->last_notification = system_time();
TRACE("ext2_create(): Starting transaction\n");
Transaction transaction(volume->GetJournal());
TRACE("ext2_create(): Creating inode\n");
Inode* inode;
bool created;
status_t status = Inode::Create(transaction, directory, name,
S_FILE | (mode & S_IUMSK), openMode, EXT2_TYPE_FILE, &created, _vnodeID,
&inode, &gExt2VnodeOps);
if (status != B_OK)
return status;
TRACE("ext2_create(): Created inode\n");
if ((openMode & O_NOCACHE) != 0) {
status = inode->DisableFileCache();
if (status != B_OK)
return status;
}
entry_cache_add(volume->ID(), directory->ID(), name, *_vnodeID);
status = transaction.Done();
if (status != B_OK) {
entry_cache_remove(volume->ID(), directory->ID(), name);
return status;
}
*_cookie = cookie;
cookieDeleter.Detach();
if (created)
notify_entry_created(volume->ID(), directory->ID(), name, *_vnodeID);
return B_OK;
}