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
btrfs_read_stat(fs_volume* _volume, fs_vnode* _node, struct stat* stat)
{
Inode* inode = (Inode*)_node->private_node;
stat->st_dev = inode->GetVolume()->ID();
stat->st_ino = inode->ID();
stat->st_nlink = 1;
stat->st_blksize = BTRFS_IO_SIZE;
stat->st_uid = inode->UserID();
stat->st_gid = inode->GroupID();
stat->st_mode = inode->Mode();
stat->st_type = 0;
inode->GetAccessTime(stat->st_atim);
inode->GetModificationTime(stat->st_mtim);
inode->GetChangeTime(stat->st_ctim);
inode->GetCreationTime(stat->st_crtim);
stat->st_size = inode->Size();
stat->st_blocks = (inode->Size() + 511) / 512;
return B_OK;
}
static status_t
ext2_get_file_map(fs_volume* _volume, fs_vnode* _node, off_t offset,
size_t size, struct file_io_vec* vecs, size_t* _count)
{
TRACE("ext2_get_file_map()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
size_t index = 0, max = *_count;
while (true) {
fsblock_t block;
uint32 count = 1;
status_t status = inode->FindBlock(offset, block, &count);
if (status != B_OK)
return status;
if (block > volume->NumBlocks()) {
panic("ext2_get_file_map() found block %" B_PRIu64 " for offset %"
B_PRIdOFF "\n", block, offset);
}
off_t blockOffset = block << volume->BlockShift();
uint32 blockLength = volume->BlockSize() * count;
if (index > 0 && (vecs[index - 1].offset
== blockOffset - vecs[index - 1].length
|| (vecs[index - 1].offset == -1 && block == 0))) {
vecs[index - 1].length += blockLength;
} else {
if (index >= max) {
// we're out of file_io_vecs; let's bail out
*_count = index;
return B_BUFFER_OVERFLOW;
}
// 'block' is 0 for sparse blocks
if (block != 0)
vecs[index].offset = blockOffset;
else
vecs[index].offset = -1;
vecs[index].length = blockLength;
index++;
}
offset += blockLength;
if (offset >= inode->Size() || size <= blockLength) {
// We're done!
*_count = index;
TRACE("ext2_get_file_map for inode %" B_PRIdINO "\n", inode->ID());
return B_OK;
}
size -= blockLength;
}
// can never get here
return B_ERROR;
}
static status_t
ext2_read_stat(fs_volume* _volume, fs_vnode* _node, struct stat* stat)
{
Inode* inode = (Inode*)_node->private_node;
const ext2_inode& node = inode->Node();
stat->st_dev = inode->GetVolume()->ID();
stat->st_ino = inode->ID();
stat->st_nlink = node.NumLinks();
stat->st_blksize = EXT2_IO_SIZE;
stat->st_uid = node.UserID();
stat->st_gid = node.GroupID();
stat->st_mode = node.Mode();
stat->st_type = 0;
inode->GetAccessTime(&stat->st_atim);
inode->GetModificationTime(&stat->st_mtim);
inode->GetChangeTime(&stat->st_ctim);
inode->GetCreationTime(&stat->st_crtim);
stat->st_size = inode->Size();
stat->st_blocks = (inode->Size() + 511) / 512;
return B_OK;
}
static status_t
ext2_read_attr_dir(fs_volume* _volume, fs_vnode* _node,
void* _cookie, struct dirent* dirent, size_t bufferSize,
uint32* _num)
{
Inode* inode = (Inode*)_node->private_node;
int32 index = *(int32 *)_cookie;
Attribute attribute(inode);
TRACE("%s()\n", __FUNCTION__);
size_t length = bufferSize;
status_t status = attribute.Find(index);
if (status == B_ENTRY_NOT_FOUND) {
*_num = 0;
return B_OK;
} else if (status != B_OK)
return status;
status = attribute.GetName(dirent->d_name, &length);
if (status != B_OK)
return B_OK;
Volume* volume = (Volume*)_volume->private_volume;
dirent->d_dev = volume->ID();
dirent->d_ino = inode->ID();
dirent->d_reclen = sizeof(struct dirent) + length;
*_num = 1;
*(int32*)_cookie = index + 1;
return B_OK;
}
static status_t
ext2_create_dir(fs_volume* _volume, fs_vnode* _directory, const char* name,
int mode)
{
TRACE("ext2_create_dir()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* directory = (Inode*)_directory->private_node;
if (volume->IsReadOnly())
return B_READ_ONLY_DEVICE;
if (!directory->IsDirectory())
return B_BAD_TYPE;
status_t status = directory->CheckPermissions(W_OK);
if (status != B_OK)
return status;
TRACE("ext2_create_dir(): Starting transaction\n");
Transaction transaction(volume->GetJournal());
ino_t id;
status = Inode::Create(transaction, directory, name,
S_DIRECTORY | (mode & S_IUMSK), 0, EXT2_TYPE_DIRECTORY, NULL, &id);
if (status != B_OK)
return status;
put_vnode(volume->FSVolume(), id);
entry_cache_add(volume->ID(), directory->ID(), name, id);
status = transaction.Done();
if (status != B_OK) {
entry_cache_remove(volume->ID(), directory->ID(), name);
return status;
}
notify_entry_created(volume->ID(), directory->ID(), name, id);
TRACE("ext2_create_dir(): Done\n");
return B_OK;
}
static status_t
ext2_remove_vnode(fs_volume* _volume, fs_vnode* _node, bool reenter)
{
TRACE("ext2_remove_vnode()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
ObjectDeleter<Inode> inodeDeleter(inode);
if (!inode->IsDeleted())
return B_OK;
TRACE("ext2_remove_vnode(): Starting transaction\n");
Transaction transaction(volume->GetJournal());
if (!inode->IsSymLink() || inode->Size() >= EXT2_SHORT_SYMLINK_LENGTH) {
TRACE("ext2_remove_vnode(): Truncating\n");
status_t status = inode->Resize(transaction, 0);
if (status != B_OK)
return status;
}
TRACE("ext2_remove_vnode(): Removing from orphan list\n");
status_t status = volume->RemoveOrphan(transaction, inode->ID());
if (status != B_OK)
return status;
TRACE("ext2_remove_vnode(): Setting deletion time\n");
inode->Node().SetDeletionTime(real_time_clock());
status = inode->WriteBack(transaction);
if (status != B_OK)
return status;
TRACE("ext2_remove_vnode(): Freeing inode\n");
status = volume->FreeInode(transaction, inode->ID(), inode->IsDirectory());
// TODO: When Transaction::Done() fails, do we have to re-add the vnode?
if (status == B_OK)
status = transaction.Done();
return status;
}
static status_t
btrfs_free_cookie(fs_volume* _volume, fs_vnode* _node, void* _cookie)
{
file_cookie* cookie = (file_cookie*)_cookie;
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
if (inode->Size() != cookie->last_size)
notify_stat_changed(volume->ID(), inode->ID(), B_STAT_SIZE);
delete cookie;
return B_OK;
}
static status_t
ext2_write(fs_volume* _volume, fs_vnode* _node, void* _cookie, off_t pos,
const void* buffer, size_t* _length)
{
TRACE("ext2_write()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
if (volume->IsReadOnly())
return B_READ_ONLY_DEVICE;
if (inode->IsDirectory()) {
*_length = 0;
return B_IS_A_DIRECTORY;
}
TRACE("ext2_write(): Preparing cookie\n");
file_cookie* cookie = (file_cookie*)_cookie;
if ((cookie->open_mode & O_APPEND) != 0)
pos = inode->Size();
TRACE("ext2_write(): Creating transaction\n");
Transaction transaction;
status_t status = inode->WriteAt(transaction, pos, (const uint8*)buffer,
_length);
if (status == B_OK)
status = transaction.Done();
if (status == B_OK) {
TRACE("ext2_write(): Finalizing\n");
ReadLocker lock(*inode->Lock());
if (cookie->last_size != inode->Size()
&& system_time() > cookie->last_notification
+ INODE_NOTIFICATION_INTERVAL) {
notify_stat_changed(volume->ID(), -1, inode->ID(),
B_STAT_MODIFICATION_TIME | B_STAT_SIZE | B_STAT_INTERIM_UPDATE);
cookie->last_size = inode->Size();
cookie->last_notification = system_time();
}
}
TRACE("ext2_write(): Done\n");
return status;
}
static status_t
ext2_free_cookie(fs_volume* _volume, fs_vnode* _node, void* _cookie)
{
file_cookie* cookie = (file_cookie*)_cookie;
Volume* volume = (Volume*)_volume->private_volume;
Inode* inode = (Inode*)_node->private_node;
if (inode->Size() != cookie->last_size)
notify_stat_changed(volume->ID(), -1, inode->ID(), B_STAT_SIZE);
if ((cookie->open_mode & O_NOCACHE) != 0)
inode->EnableFileCache();
delete cookie;
return B_OK;
}
static status_t
btrfs_get_file_map(fs_volume* _volume, fs_vnode* _node, off_t offset,
size_t size, struct file_io_vec* vecs, size_t* _count)
{
TRACE("btrfs_get_file_map()\n");
Inode* inode = (Inode*)_node->private_node;
size_t index = 0, max = *_count;
while (true) {
off_t blockOffset;
off_t blockLength;
status_t status = inode->FindBlock(offset, blockOffset, &blockLength);
if (status != B_OK)
return status;
if (index > 0 && (vecs[index - 1].offset
== blockOffset - vecs[index - 1].length)) {
vecs[index - 1].length += blockLength;
} else {
if (index >= max) {
// we're out of file_io_vecs; let's bail out
*_count = index;
return B_BUFFER_OVERFLOW;
}
vecs[index].offset = blockOffset;
vecs[index].length = blockLength;
index++;
}
offset += blockLength;
size -= blockLength;
if ((off_t)size <= vecs[index - 1].length || offset >= inode->Size()) {
// We're done!
*_count = index;
TRACE("btrfs_get_file_map for inode %" B_PRIdINO "\n", inode->ID());
return B_OK;
}
}
// can never get here
return B_ERROR;
}
status_t
Inode::Unlink(Transaction& transaction)
{
uint32 numLinks = fNode.NumLinks();
TRACE("Inode::Unlink(): Current links: %lu\n", numLinks);
if (numLinks == 0)
return B_BAD_VALUE;
if ((IsDirectory() && numLinks == 2) || (numLinks == 1)) {
fUnlinked = true;
TRACE("Inode::Unlink(): Putting inode in orphan list\n");
ino_t firstOrphanID;
status_t status = fVolume->SaveOrphan(transaction, fID, firstOrphanID);
if (status != B_OK)
return status;
if (firstOrphanID != 0) {
Vnode firstOrphan(fVolume, firstOrphanID);
Inode* nextOrphan;
status = firstOrphan.Get(&nextOrphan);
if (status != B_OK)
return status;
fNode.SetNextOrphan(nextOrphan->ID());
} else {
// Next orphan link is stored in deletion time
fNode.deletion_time = 0;
}
fNode.num_links = 0;
status = remove_vnode(fVolume->FSVolume(), fID);
if (status != B_OK)
return status;
} else
fNode.SetNumLinks(--numLinks);
return WriteBack(transaction);
}
/*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;
}
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;
}
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;
}
status_t
ext2_write_stat(fs_volume* _volume, fs_vnode* _node, const struct stat* stat,
uint32 mask)
{
TRACE("ext2_write_stat\n");
Volume* volume = (Volume*)_volume->private_volume;
if (volume->IsReadOnly())
return B_READ_ONLY_DEVICE;
Inode* inode = (Inode*)_node->private_node;
ext2_inode& node = inode->Node();
bool updateTime = false;
uid_t uid = geteuid();
bool isOwnerOrRoot = uid == 0 || uid == (uid_t)node.UserID();
bool hasWriteAccess = inode->CheckPermissions(W_OK) == B_OK;
TRACE("ext2_write_stat: Starting transaction\n");
Transaction transaction(volume->GetJournal());
inode->WriteLockInTransaction(transaction);
if ((mask & B_STAT_SIZE) != 0 && inode->Size() != stat->st_size) {
if (inode->IsDirectory())
return B_IS_A_DIRECTORY;
if (!inode->IsFile())
return B_BAD_VALUE;
if (!hasWriteAccess)
return B_NOT_ALLOWED;
TRACE("ext2_write_stat: Old size: %ld, new size: %ld\n",
(long)inode->Size(), (long)stat->st_size);
off_t oldSize = inode->Size();
status_t status = inode->Resize(transaction, stat->st_size);
if(status != B_OK)
return status;
if ((mask & B_STAT_SIZE_INSECURE) == 0) {
rw_lock_write_unlock(inode->Lock());
inode->FillGapWithZeros(oldSize, inode->Size());
rw_lock_write_lock(inode->Lock());
}
updateTime = true;
}
if ((mask & B_STAT_MODE) != 0) {
// only the user or root can do that
if (!isOwnerOrRoot)
return B_NOT_ALLOWED;
node.UpdateMode(stat->st_mode, S_IUMSK);
updateTime = true;
}
if ((mask & B_STAT_UID) != 0) {
// only root should be allowed
if (uid != 0)
return B_NOT_ALLOWED;
node.SetUserID(stat->st_uid);
updateTime = true;
}
if ((mask & B_STAT_GID) != 0) {
// only the user or root can do that
if (!isOwnerOrRoot)
return B_NOT_ALLOWED;
node.SetGroupID(stat->st_gid);
updateTime = true;
}
if ((mask & B_STAT_MODIFICATION_TIME) != 0 || updateTime
|| (mask & B_STAT_CHANGE_TIME) != 0) {
// the user or root can do that or any user with write access
if (!isOwnerOrRoot && !hasWriteAccess)
return B_NOT_ALLOWED;
struct timespec newTimespec = { 0, 0};
if ((mask & B_STAT_MODIFICATION_TIME) != 0)
newTimespec = stat->st_mtim;
if ((mask & B_STAT_CHANGE_TIME) != 0
&& stat->st_ctim.tv_sec > newTimespec.tv_sec)
newTimespec = stat->st_ctim;
if (newTimespec.tv_sec == 0)
Inode::_BigtimeToTimespec(real_time_clock_usecs(), &newTimespec);
inode->SetModificationTime(&newTimespec);
}
if ((mask & B_STAT_CREATION_TIME) != 0) {
// the user or root can do that or any user with write access
if (!isOwnerOrRoot && !hasWriteAccess)
return B_NOT_ALLOWED;
inode->SetCreationTime(&stat->st_crtim);
}
status_t status = inode->WriteBack(transaction);
if (status == B_OK)
status = transaction.Done();
if (status == B_OK)
notify_stat_changed(volume->ID(), -1, inode->ID(), mask);
return status;
}
static status_t
nfs4_mount(fs_volume* volume, const char* device, uint32 flags,
const char* args, ino_t* _rootVnodeID)
{
TRACE("volume = %p, device = %s, flags = %" B_PRIu32 ", args = %s", volume,
device, flags, args);
status_t result;
/* prepare idmapper server */
MutexLocker locker(gIdMapperLock);
gIdMapper = new(std::nothrow) IdMap;
if (gIdMapper == NULL)
return B_NO_MEMORY;
result = gIdMapper->InitStatus();
if (result != B_OK) {
delete gIdMapper;
gIdMapper = NULL;
return result;
}
locker.Unlock();
AddressResolver* resolver;
MountConfiguration config;
char* path;
result = ParseArguments(args, &resolver, &path, &config);
if (result != B_OK)
return result;
MemoryDeleter pathDeleter(path);
RPC::Server* server;
result = gRPCServerManager->Acquire(&server, resolver, CreateNFS4Server);
delete resolver;
if (result != B_OK)
return result;
FileSystem* fs;
result = FileSystem::Mount(&fs, server, path, volume->id, config);
if (result != B_OK) {
gRPCServerManager->Release(server);
return result;
}
Inode* inode = fs->Root();
if (inode == NULL) {
delete fs;
gRPCServerManager->Release(server);
return B_IO_ERROR;
}
volume->private_volume = fs;
volume->ops = &gNFSv4VolumeOps;
VnodeToInode* vti = new VnodeToInode(inode->ID(), fs);
if (vti == NULL) {
delete fs;
gRPCServerManager->Release(server);
return B_NO_MEMORY;
}
vti->Replace(inode);
result = publish_vnode(volume, inode->ID(), vti, &gNFSv4VnodeOps,
inode->Type(), 0);
if (result != B_OK)
return result;
*_rootVnodeID = inode->ID();
TRACE("*_rootVnodeID = %" B_PRIi64, inode->ID());
return B_OK;
}
static status_t
ext2_create_symlink(fs_volume* _volume, fs_vnode* _directory, const char* name,
const char* path, int mode)
{
TRACE("ext2_create_symlink()\n");
Volume* volume = (Volume*)_volume->private_volume;
Inode* directory = (Inode*)_directory->private_node;
if (volume->IsReadOnly())
return B_READ_ONLY_DEVICE;
if (!directory->IsDirectory())
return B_BAD_TYPE;
status_t status = directory->CheckPermissions(W_OK);
if (status != B_OK)
return status;
TRACE("ext2_create_symlink(): Starting transaction\n");
Transaction transaction(volume->GetJournal());
Inode* link;
ino_t id;
status = Inode::Create(transaction, directory, name, S_SYMLINK | 0777,
0, (uint8)EXT2_TYPE_SYMLINK, NULL, &id, &link);
if (status != B_OK)
return status;
// TODO: We have to prepare the link before publishing?
size_t length = strlen(path);
TRACE("ext2_create_symlink(): Path (%s) length: %d\n", path, (int)length);
if (length < EXT2_SHORT_SYMLINK_LENGTH) {
strcpy(link->Node().symlink, path);
link->Node().SetSize((uint32)length);
TRACE("ext2_create_symlink(): Publishing vnode\n");
publish_vnode(volume->FSVolume(), id, link, &gExt2VnodeOps,
link->Mode(), 0);
put_vnode(volume->FSVolume(), id);
} else {
TRACE("ext2_create_symlink(): Publishing vnode\n");
publish_vnode(volume->FSVolume(), id, link, &gExt2VnodeOps,
link->Mode(), 0);
put_vnode(volume->FSVolume(), id);
if (!link->HasFileCache()) {
status = link->CreateFileCache();
if (status != B_OK)
return status;
}
size_t written = length;
status = link->WriteAt(transaction, 0, (const uint8*)path, &written);
if (status == B_OK && written != length)
status = B_IO_ERROR;
}
if (status == B_OK)
status = link->WriteBack(transaction);
entry_cache_add(volume->ID(), directory->ID(), name, id);
status = transaction.Done();
if (status != B_OK) {
entry_cache_remove(volume->ID(), directory->ID(), name);
return status;
}
notify_entry_created(volume->ID(), directory->ID(), name, id);
TRACE("ext2_create_symlink(): Done\n");
return status;
}