static status_t
ext2_unlink(fs_volume* _volume, fs_vnode* _directory, const char* name)
{
TRACE("ext2_unlink()\n");
if (strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
return B_NOT_ALLOWED;
Volume* volume = (Volume*)_volume->private_volume;
Inode* directory = (Inode*)_directory->private_node;
status_t status = directory->CheckPermissions(W_OK);
if (status != B_OK)
return status;
TRACE("ext2_unlink(): Starting transaction\n");
Transaction transaction(volume->GetJournal());
directory->WriteLockInTransaction(transaction);
TRACE("ext2_unlink(): Looking up for directory entry\n");
HTree htree(volume, directory);
DirectoryIterator* directoryIterator;
status = htree.Lookup(name, &directoryIterator);
if (status != B_OK)
return status;
ino_t id;
status = directoryIterator->FindEntry(name, &id);
if (status != B_OK)
return status;
Vnode vnode(volume, id);
Inode* inode;
status = vnode.Get(&inode);
if (status != B_OK)
return status;
inode->WriteLockInTransaction(transaction);
status = inode->Unlink(transaction);
if (status != B_OK)
return status;
status = directoryIterator->RemoveEntry(transaction);
if (status != B_OK)
return status;
entry_cache_remove(volume->ID(), directory->ID(), name);
status = transaction.Done();
if (status != B_OK)
entry_cache_add(volume->ID(), directory->ID(), name, id);
else
notify_entry_removed(volume->ID(), directory->ID(), name, id);
return status;
}
static status_t
ext2_rename(fs_volume* _volume, fs_vnode* _oldDir, const char* oldName,
fs_vnode* _newDir, const char* newName)
{
TRACE("ext2_rename()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* oldDirectory = (Inode*)_oldDir->private_node;
Inode* newDirectory = (Inode*)_newDir->private_node;
if (oldDirectory == newDirectory && strcmp(oldName, newName) == 0)
return B_OK;
Transaction transaction(volume->GetJournal());
oldDirectory->WriteLockInTransaction(transaction);
if (oldDirectory != newDirectory)
newDirectory->WriteLockInTransaction(transaction);
status_t status = oldDirectory->CheckPermissions(W_OK);
if (status == B_OK)
status = newDirectory->CheckPermissions(W_OK);
if (status != B_OK)
return status;
HTree oldHTree(volume, oldDirectory);
DirectoryIterator* oldIterator;
status = oldHTree.Lookup(oldName, &oldIterator);
if (status != B_OK)
return status;
ObjectDeleter<DirectoryIterator> oldIteratorDeleter(oldIterator);
ino_t oldID;
status = oldIterator->FindEntry(oldName, &oldID);
if (status != B_OK)
return status;
if (oldDirectory != newDirectory) {
TRACE("ext2_rename(): Different parent directories\n");
CachedBlock cached(volume);
ino_t parentID = newDirectory->ID();
ino_t oldDirID = oldDirectory->ID();
do {
Vnode vnode(volume, parentID);
Inode* parent;
status = vnode.Get(&parent);
if (status != B_OK)
return B_IO_ERROR;
fsblock_t blockNum;
status = parent->FindBlock(0, blockNum);
if (status != B_OK)
return status;
const HTreeRoot* data = (const HTreeRoot*)cached.SetTo(blockNum);
parentID = data->dotdot.InodeID();
} while (parentID != oldID && parentID != oldDirID
&& parentID != EXT2_ROOT_NODE);
if (parentID == oldID)
return B_BAD_VALUE;
}
HTree newHTree(volume, newDirectory);
DirectoryIterator* newIterator;
status = newHTree.Lookup(newName, &newIterator);
if (status != B_OK)
return status;
ObjectDeleter<DirectoryIterator> newIteratorDeleter(newIterator);
Vnode vnode(volume, oldID);
Inode* inode;
status = vnode.Get(&inode);
if (status != B_OK)
return status;
uint8 fileType;
// TODO: Support all file types?
if (inode->IsDirectory())
fileType = EXT2_TYPE_DIRECTORY;
else if (inode->IsSymLink())
fileType = EXT2_TYPE_SYMLINK;
else
fileType = EXT2_TYPE_FILE;
// Add entry in destination directory
ino_t existentID;
status = newIterator->FindEntry(newName, &existentID);
if (status == B_OK) {
if (existentID == oldID) {
// Remove entry in oldID
// return inode->Unlink();
return B_BAD_VALUE;
}
Vnode vnodeExistent(volume, existentID);
Inode* existent;
if (vnodeExistent.Get(&existent) != B_OK)
return B_NAME_IN_USE;
if (existent->IsDirectory() != inode->IsDirectory()) {
return existent->IsDirectory() ? B_IS_A_DIRECTORY
: B_NOT_A_DIRECTORY;
}
// TODO: Perhaps we have to revert this in case of error?
status = newIterator->ChangeEntry(transaction, oldID, fileType);
if (status != B_OK)
return status;
notify_entry_removed(volume->ID(), newDirectory->ID(), newName,
existentID);
} else if (status == B_ENTRY_NOT_FOUND) {
newIterator->Restart();
status = newIterator->AddEntry(transaction, newName, strlen(newName),
oldID, fileType);
if (status != B_OK)
return status;
} else
return status;
// Remove entry from source folder
status = oldIterator->RemoveEntry(transaction);
if (status != B_OK)
return status;
inode->WriteLockInTransaction(transaction);
if (oldDirectory != newDirectory && inode->IsDirectory()) {
DirectoryIterator inodeIterator(inode);
status = inodeIterator.FindEntry("..");
if (status == B_ENTRY_NOT_FOUND) {
TRACE("Corrupt file system. Missing \"..\" in directory %"
B_PRIdINO "\n", inode->ID());
return B_BAD_DATA;
} else if (status != B_OK)
return status;
inodeIterator.ChangeEntry(transaction, newDirectory->ID(),
(uint8)EXT2_TYPE_DIRECTORY);
}
status = inode->WriteBack(transaction);
if (status != B_OK)
return status;
entry_cache_remove(volume->ID(), oldDirectory->ID(), oldName);
entry_cache_add(volume->ID(), newDirectory->ID(), newName, oldID);
status = transaction.Done();
if (status != B_OK) {
entry_cache_remove(volume->ID(), oldDirectory->ID(), newName);
entry_cache_add(volume->ID(), newDirectory->ID(), oldName, oldID);
return status;
}
notify_entry_moved(volume->ID(), oldDirectory->ID(), oldName,
newDirectory->ID(), newName, oldID);
return B_OK;
}