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
btrfs_open(fs_volume* /*_volume*/, fs_vnode* _node, int openMode,
void** _cookie)
{
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 & BTRFS_OPEN_MODE_USER_MASK;
cookie->last_size = inode->Size();
cookie->last_notification = system_time();
if ((openMode & O_NOCACHE) != 0 && inode->FileCache() != NULL) {
// Disable the file cache, if requested?
status = file_cache_disable(inode->FileCache());
if (status != B_OK)
return status;
}
cookieDeleter.Detach();
*_cookie = cookie;
return B_OK;
}
/*static*/ status_t
Inode::Create(Transaction& transaction, Inode* parent, const char* name,
int32 mode, int openMode, uint8 type, bool* _created, ino_t* _id,
Inode** _inode, fs_vnode_ops* vnodeOps, uint32 publishFlags)
{
TRACE("Inode::Create()\n");
Volume* volume = transaction.GetVolume();
DirectoryIterator* entries = NULL;
ObjectDeleter<DirectoryIterator> entriesDeleter;
if (parent != NULL) {
parent->WriteLockInTransaction(transaction);
TRACE("Inode::Create(): Looking up entry destination\n");
HTree htree(volume, parent);
status_t status = htree.Lookup(name, &entries);
if (status == B_ENTRY_NOT_FOUND) {
panic("We need to add the first node.\n");
return B_ERROR;
}
if (status != B_OK)
return status;
entriesDeleter.SetTo(entries);
TRACE("Inode::Create(): Looking up to see if file already exists\n");
ino_t entryID;
status = entries->FindEntry(name, &entryID);
if (status == B_OK) {
// File already exists
TRACE("Inode::Create(): File already exists\n");
if (S_ISDIR(mode) || S_ISLNK(mode) || (openMode & O_EXCL) != 0)
return B_FILE_EXISTS;
Vnode vnode(volume, entryID);
Inode* inode;
status = vnode.Get(&inode);
if (status != B_OK) {
TRACE("Inode::Create() Failed to get the inode from the "
"vnode\n");
return B_ENTRY_NOT_FOUND;
}
if (inode->IsDirectory() && (openMode & O_RWMASK) != O_RDONLY)
return B_IS_A_DIRECTORY;
if ((openMode & O_DIRECTORY) != 0 && !inode->IsDirectory())
return B_NOT_A_DIRECTORY;
if (inode->CheckPermissions(open_mode_to_access(openMode)
| ((openMode & O_TRUNC) != 0 ? W_OK : 0)) != B_OK)
return B_NOT_ALLOWED;
if ((openMode & O_TRUNC) != 0) {
// Truncate requested
TRACE("Inode::Create(): Truncating file\n");
inode->WriteLockInTransaction(transaction);
status = inode->Resize(transaction, 0);
if (status != B_OK)
return status;
}
if (_created != NULL)
*_created = false;
if (_id != NULL)
*_id = inode->ID();
if (_inode != NULL)
*_inode = inode;
if (_id != NULL || _inode != NULL)
vnode.Keep();
TRACE("Inode::Create(): Done opening file\n");
return B_OK;
/*} else if ((mode & S_ATTR_DIR) == 0) {
TRACE("Inode::Create(): (mode & S_ATTR_DIR) == 0\n");
return B_BAD_VALUE;*/
} else if ((openMode & O_DIRECTORY) != 0) {
TRACE("Inode::Create(): (openMode & O_DIRECTORY) != 0\n");
return B_ENTRY_NOT_FOUND;
}
// Return to initial position
TRACE("Inode::Create(): Restarting iterator\n");
entries->Restart();
}
status_t status;
if (parent != NULL) {
status = parent->CheckPermissions(W_OK);
if (status != B_OK)
return status;
}
TRACE("Inode::Create(): Allocating inode\n");
ino_t id;
status = volume->AllocateInode(transaction, parent, mode, id);
if (status != B_OK) {
ERROR("Inode::Create(): AllocateInode() failed\n");
return status;
}
if (entries != NULL) {
size_t nameLength = strlen(name);
status = entries->AddEntry(transaction, name, nameLength, id, type);
if (status != B_OK) {
ERROR("Inode::Create(): AddEntry() failed\n");
return status;
}
}
TRACE("Inode::Create(): Creating inode\n");
Inode* inode = new(std::nothrow) Inode(volume);
if (inode == NULL)
return B_NO_MEMORY;
TRACE("Inode::Create(): Getting node structure\n");
ext2_inode& node = inode->Node();
TRACE("Inode::Create(): Initializing inode data\n");
memset(&node, 0, sizeof(ext2_inode));
node.SetMode(mode);
node.SetUserID(geteuid());
node.SetGroupID(parent != NULL ? parent->Node().GroupID() : getegid());
node.SetNumLinks(inode->IsDirectory() ? 2 : 1);
TRACE("Inode::Create(): Updating time\n");
struct timespec timespec;
_BigtimeToTimespec(real_time_clock_usecs(), ×pec);
inode->SetAccessTime(×pec);
inode->SetCreationTime(×pec);
inode->SetModificationTime(×pec);
node.SetFlags(parent->Flags() & EXT2_INODE_INHERITED);
if (volume->HasExtentsFeature()
&& (inode->IsDirectory() || inode->IsFile())) {
node.SetFlag(EXT2_INODE_EXTENTS);
ExtentStream stream(volume, &node.extent_stream, 0);
stream.Init();
ASSERT(stream.Check());
}
if (sizeof(ext2_inode) < volume->InodeSize())
node.SetExtraInodeSize(sizeof(ext2_inode) - EXT2_INODE_NORMAL_SIZE);
TRACE("Inode::Create(): Updating ID\n");
inode->fID = id;
if (inode->IsDirectory()) {
TRACE("Inode::Create(): Initializing directory\n");
status = inode->InitDirectory(transaction, parent);
if (status != B_OK) {
ERROR("Inode::Create(): InitDirectory() failed\n");
delete inode;
return status;
}
}
// TODO: Maybe it can be better
/*if (volume->HasExtendedAttributes()) {
TRACE("Inode::Create(): Initializing extended attributes\n");
uint32 blockGroup = 0;
uint32 pos = 0;
uint32 allocated;
status = volume->AllocateBlocks(transaction, 1, 1, blockGroup, pos,
allocated);
if (status != B_OK)
return status;
// Clear the new block
uint32 blockNum = volume->FirstDataBlock() + pos +
volume->BlocksPerGroup() * blockGroup;
CachedBlock cached(volume);
cached.SetToWritable(transaction, blockNum, true);
node.SetExtendedAttributesBlock(blockNum);
}*/
TRACE("Inode::Create(): Saving inode\n");
status = inode->WriteBack(transaction);
if (status != B_OK) {
delete inode;
return status;
}
TRACE("Inode::Create(): Creating vnode\n");
Vnode vnode;
status = vnode.Publish(transaction, inode, vnodeOps, publishFlags);
if (status != B_OK)
return status;
if (!inode->IsSymLink()) {
// Vnode::Publish doesn't publish symlinks
if (!inode->IsDirectory()) {
status = inode->EnableFileCache();
if (status != B_OK)
return status;
}
inode->WriteLockInTransaction(transaction);
}
if (_created)
*_created = true;
if (_id != NULL)
*_id = id;
if (_inode != NULL)
*_inode = inode;
if (_id != NULL || _inode != NULL)
vnode.Keep();
TRACE("Inode::Create(): Deleting entries iterator\n");
DirectoryIterator* iterator = entriesDeleter.Detach();
TRACE("Inode::Create(): Entries iterator: %p\n", entries);
delete iterator;
TRACE("Inode::Create(): Done\n");
return B_OK;
}
status_t
Attribute::CheckAccess(const char* name, int openMode)
{
return fInode->CheckPermissions(open_mode_to_access(openMode)
| (openMode & O_TRUNC ? W_OK : 0));
}
