| // Copyright 2019 The Chromium OS Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "smbfs/smb_filesystem.h" |
| |
| #include <utility> |
| #include <vector> |
| |
| #include <base/bind.h> |
| #include <base/callback_helpers.h> |
| #include <base/logging.h> |
| #include <base/posix/safe_strerror.h> |
| #include <base/strings/string_piece.h> |
| #include <base/strings/string_util.h> |
| |
| #include "smbfs/smbfs_impl.h" |
| #include "smbfs/util.h" |
| |
| namespace smbfs { |
| |
| namespace { |
| |
| constexpr char kSambaThreadName[] = "smbfs-libsmb"; |
| constexpr char kUrlPrefix[] = "smb://"; |
| |
| constexpr double kAttrTimeoutSeconds = 5.0; |
| constexpr mode_t kAllowedFileTypes = S_IFREG | S_IFDIR; |
| constexpr mode_t kFileModeMask = kAllowedFileTypes | 0770; |
| |
| void SambaLog(void* private_ptr, int level, const char* msg) { |
| VLOG(level) << "libsmbclient: " << msg; |
| } |
| |
| bool IsAllowedFileMode(mode_t mode) { |
| return mode & kAllowedFileTypes; |
| } |
| |
| void CopyCredential(const std::string& cred, char* out, int out_len) { |
| DCHECK_GT(out_len, 0); |
| if (cred.size() > out_len - 1) { |
| LOG(ERROR) << "Credential string longer than buffer provided"; |
| } |
| base::strlcpy(out, cred.c_str(), out_len); |
| } |
| |
| void CopyPassword(const password_provider::Password& password, |
| char* out, |
| int out_len) { |
| DCHECK_GT(out_len, 0); |
| if (password.size() > out_len - 1) { |
| LOG(ERROR) << "Password string longer than buffer provided"; |
| } |
| base::strlcpy(out, password.GetRaw(), out_len); |
| } |
| |
| } // namespace |
| |
| SmbFilesystem::SmbFilesystem(const std::string& share_path, |
| uid_t uid, |
| gid_t gid, |
| std::unique_ptr<SmbCredential> credentials) |
| : share_path_(share_path), |
| uid_(uid), |
| gid_(gid), |
| credentials_(std::move(credentials)), |
| samba_thread_(kSambaThreadName) { |
| // Ensure files are not owned by root. |
| CHECK_GT(uid_, 0); |
| CHECK_GT(gid_, 0); |
| |
| CHECK(!share_path_.empty()); |
| CHECK_NE(share_path_.back(), '/'); |
| |
| context_ = smbc_new_context(); |
| CHECK(context_); |
| CHECK(smbc_init_context(context_)); |
| |
| smbc_setOptionUserData(context_, this); |
| smbc_setOptionUseKerberos(context_, 1); |
| smbc_setOptionFallbackAfterKerberos(context_, 1); |
| if (credentials_) { |
| smbc_setFunctionAuthDataWithContext(context_, &SmbFilesystem::GetUserAuth); |
| } |
| |
| smbc_setLogCallback(context_, nullptr, &SambaLog); |
| int vlog_level = logging::GetVlogVerbosity(); |
| if (vlog_level > 0) { |
| smbc_setDebug(context_, vlog_level); |
| } |
| |
| smbc_close_ctx_ = smbc_getFunctionClose(context_); |
| smbc_closedir_ctx_ = smbc_getFunctionClosedir(context_); |
| smbc_ftruncate_ctx_ = smbc_getFunctionFtruncate(context_); |
| smbc_lseek_ctx_ = smbc_getFunctionLseek(context_); |
| smbc_lseekdir_ctx_ = smbc_getFunctionLseekdir(context_); |
| smbc_mkdir_ctx_ = smbc_getFunctionMkdir(context_); |
| smbc_open_ctx_ = smbc_getFunctionOpen(context_); |
| smbc_opendir_ctx_ = smbc_getFunctionOpendir(context_); |
| smbc_read_ctx_ = smbc_getFunctionRead(context_); |
| smbc_readdir_ctx_ = smbc_getFunctionReaddir(context_); |
| smbc_rename_ctx_ = smbc_getFunctionRename(context_); |
| smbc_rmdir_ctx_ = smbc_getFunctionRmdir(context_); |
| smbc_stat_ctx_ = smbc_getFunctionStat(context_); |
| smbc_telldir_ctx_ = smbc_getFunctionTelldir(context_); |
| smbc_unlink_ctx_ = smbc_getFunctionUnlink(context_); |
| smbc_write_ctx_ = smbc_getFunctionWrite(context_); |
| |
| CHECK(samba_thread_.Start()); |
| } |
| |
| SmbFilesystem::SmbFilesystem(const std::string& share_path) |
| : share_path_(share_path), samba_thread_(kSambaThreadName) {} |
| |
| SmbFilesystem::~SmbFilesystem() { |
| if (context_) { |
| // Stop the Samba processing thread before destroying the context to avoid a |
| // UAF on the context. |
| samba_thread_.Stop(); |
| smbc_free_context(context_, 1 /* shutdown_ctx */); |
| } |
| } |
| |
| SmbFilesystem::ConnectError SmbFilesystem::EnsureConnected() { |
| SMBCFILE* dir = smbc_opendir_ctx_(context_, resolved_share_path_.c_str()); |
| if (!dir) { |
| int err = errno; |
| PLOG(INFO) << "EnsureConnected smbc_opendir_ctx_ failed"; |
| switch (err) { |
| case EPERM: |
| case EACCES: |
| return ConnectError::kAccessDenied; |
| case ENODEV: |
| case ENOENT: |
| case ETIMEDOUT: |
| // This means unable to resolve host, in some, but not necessarily all |
| // cases. |
| case EINVAL: |
| // Host unreachable. |
| case EHOSTUNREACH: |
| // Host not listening on SMB port. |
| case ECONNREFUSED: |
| return ConnectError::kNotFound; |
| case ECONNABORTED: |
| return ConnectError::kSmb1Unsupported; |
| default: |
| LOG(WARNING) << "Unexpected error code " << err << ": " |
| << base::safe_strerror(err); |
| return ConnectError::kUnknownError; |
| } |
| } |
| |
| smbc_closedir_ctx_(context_, dir); |
| return ConnectError::kOk; |
| } |
| |
| void SmbFilesystem::SetSmbFsImpl(std::unique_ptr<SmbFsImpl> impl) { |
| smbfs_impl_ = std::move(impl); |
| } |
| |
| void SmbFilesystem::SetResolvedAddress(const std::vector<uint8_t>& ip_address) { |
| base::AutoLock l(lock_); |
| |
| if (ip_address.empty()) { |
| resolved_share_path_ = share_path_; |
| return; |
| } else if (ip_address.size() != 4) { |
| // TODO(crbug.com/1051291): Support IPv6. |
| LOG(ERROR) << "Invalid IP address"; |
| return; |
| } |
| |
| std::string address_str = IpAddressToString(ip_address); |
| DCHECK(!address_str.empty()); |
| |
| const base::StringPiece prefix(kUrlPrefix); |
| DCHECK(base::StartsWith(share_path_, prefix, base::CompareCase::SENSITIVE)); |
| std::string::size_type host_end = share_path_.find('/', prefix.size()); |
| DCHECK_NE(host_end, std::string::npos); |
| resolved_share_path_ = |
| std::string(prefix) + address_str + share_path_.substr(host_end); |
| } |
| |
| struct stat SmbFilesystem::MakeStat(ino_t inode, |
| const struct stat& in_stat) const { |
| struct stat stat = {0}; |
| stat.st_ino = inode; |
| stat.st_mode = in_stat.st_mode & kFileModeMask; |
| stat.st_uid = uid_; |
| stat.st_gid = gid_; |
| stat.st_nlink = 1; |
| stat.st_size = in_stat.st_size; |
| stat.st_atim = in_stat.st_atim; |
| stat.st_ctim = in_stat.st_ctim; |
| stat.st_mtim = in_stat.st_mtim; |
| return stat; |
| } |
| |
| std::string SmbFilesystem::MakeShareFilePath(const base::FilePath& path) const { |
| std::string base_share_path; |
| { |
| base::AutoLock l(lock_); |
| DCHECK(!resolved_share_path_.empty()); |
| base_share_path = resolved_share_path_; |
| } |
| |
| if (path == base::FilePath("/")) { |
| return base_share_path; |
| } |
| |
| // Paths are constructed and not passed directly over FUSE. Therefore, these |
| // two properties should always hold. |
| DCHECK(path.IsAbsolute()); |
| DCHECK(!path.EndsWithSeparator()); |
| return base_share_path + path.value(); |
| } |
| |
| std::string SmbFilesystem::ShareFilePathFromInode(ino_t inode) const { |
| const base::FilePath file_path = inode_map_.GetPath(inode); |
| CHECK(!file_path.empty()) << "Path lookup for invalid inode: " << inode; |
| return MakeShareFilePath(file_path); |
| } |
| |
| uint64_t SmbFilesystem::AddOpenFile(SMBCFILE* file) { |
| uint64_t handle = open_files_seq_++; |
| // Disallow wrap around. |
| CHECK(handle); |
| open_files_[handle] = file; |
| return handle; |
| } |
| |
| void SmbFilesystem::RemoveOpenFile(uint64_t handle) { |
| auto it = open_files_.find(handle); |
| if (it == open_files_.end()) { |
| NOTREACHED() << "File handle not found"; |
| return; |
| } |
| open_files_.erase(it); |
| } |
| |
| SMBCFILE* SmbFilesystem::LookupOpenFile(uint64_t handle) const { |
| const auto it = open_files_.find(handle); |
| if (it == open_files_.end()) { |
| return nullptr; |
| } |
| return it->second; |
| } |
| |
| // static |
| void SmbFilesystem::GetUserAuth(SMBCCTX* context, |
| const char* server, |
| const char* share, |
| char* workgroup, |
| int workgroup_len, |
| char* username, |
| int username_len, |
| char* password, |
| int password_len) { |
| SmbFilesystem* fs = |
| static_cast<SmbFilesystem*>(smbc_getOptionUserData(context)); |
| DCHECK(fs); |
| DCHECK(fs->credentials_); |
| |
| CopyCredential(fs->credentials_->workgroup, workgroup, workgroup_len); |
| CopyCredential(fs->credentials_->username, username, username_len); |
| password[0] = 0; |
| if (fs->credentials_->password) { |
| CopyPassword(*fs->credentials_->password, password, password_len); |
| } |
| } |
| |
| void SmbFilesystem::Lookup(std::unique_ptr<EntryRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::LookupInternal, base::Unretained(this), |
| std::move(request), parent_inode, name)); |
| } |
| |
| void SmbFilesystem::LookupInternal(std::unique_ptr<EntryRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| const base::FilePath parent_path = inode_map_.GetPath(parent_inode); |
| CHECK(!parent_path.empty()) |
| << "Lookup on invalid parent inode: " << parent_inode; |
| const base::FilePath file_path = parent_path.Append(name); |
| const std::string share_file_path = MakeShareFilePath(file_path); |
| |
| struct stat smb_stat = {0}; |
| int error = smbc_stat_ctx_(context_, share_file_path.c_str(), &smb_stat); |
| if (error < 0) { |
| request->ReplyError(errno); |
| return; |
| } else if (!IsAllowedFileMode(smb_stat.st_mode)) { |
| VLOG(1) << "Disallowed file mode " << smb_stat.st_mode << " for path " |
| << share_file_path; |
| request->ReplyError(EACCES); |
| return; |
| } |
| |
| ino_t inode = inode_map_.IncInodeRef(file_path); |
| struct stat entry_stat = MakeStat(inode, smb_stat); |
| |
| fuse_entry_param entry = {0}; |
| entry.ino = inode; |
| entry.generation = 1; |
| entry.attr = entry_stat; |
| entry.attr_timeout = kAttrTimeoutSeconds; |
| entry.entry_timeout = kAttrTimeoutSeconds; |
| request->ReplyEntry(entry); |
| } |
| |
| void SmbFilesystem::Forget(fuse_ino_t inode, uint64_t count) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, base::BindOnce(&SmbFilesystem::ForgetInternal, |
| base::Unretained(this), inode, count)); |
| } |
| |
| void SmbFilesystem::ForgetInternal(fuse_ino_t inode, uint64_t count) { |
| inode_map_.Forget(inode, count); |
| } |
| |
| void SmbFilesystem::GetAttr(std::unique_ptr<AttrRequest> request, |
| fuse_ino_t inode) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::GetAttrInternal, base::Unretained(this), |
| std::move(request), inode)); |
| } |
| |
| void SmbFilesystem::GetAttrInternal(std::unique_ptr<AttrRequest> request, |
| fuse_ino_t inode) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| const std::string share_file_path = ShareFilePathFromInode(inode); |
| struct stat smb_stat = {0}; |
| int error = smbc_stat_ctx_(context_, share_file_path.c_str(), &smb_stat); |
| if (error < 0) { |
| request->ReplyError(errno); |
| return; |
| } else if (!IsAllowedFileMode(smb_stat.st_mode)) { |
| VLOG(1) << "Disallowed file mode " << smb_stat.st_mode << " for path " |
| << share_file_path; |
| request->ReplyError(EACCES); |
| return; |
| } |
| |
| struct stat reply_stat = MakeStat(inode, smb_stat); |
| request->ReplyAttr(reply_stat, kAttrTimeoutSeconds); |
| } |
| |
| void SmbFilesystem::SetAttr(std::unique_ptr<AttrRequest> request, |
| fuse_ino_t inode, |
| base::Optional<uint64_t> file_handle, |
| const struct stat& attr, |
| int to_set) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, base::BindOnce(&SmbFilesystem::SetAttrInternal, |
| base::Unretained(this), std::move(request), |
| inode, std::move(file_handle), attr, to_set)); |
| } |
| |
| void SmbFilesystem::SetAttrInternal(std::unique_ptr<AttrRequest> request, |
| fuse_ino_t inode, |
| base::Optional<uint64_t> file_handle, |
| const struct stat& attr, |
| int to_set) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| // Currently, only setting size is supported (ie. O_TRUC, ftruncate()). |
| const int kSupportedAttrs = FUSE_SET_ATTR_SIZE; |
| if (to_set & ~kSupportedAttrs) { |
| LOG(WARNING) << "Unsupported |to_set| flags on setattr: " << to_set; |
| request->ReplyError(ENOTSUP); |
| return; |
| } |
| if (!to_set) { |
| VLOG(1) << "No supported |to_set| flags set on setattr: " << to_set; |
| request->ReplyError(EINVAL); |
| return; |
| } |
| |
| const std::string share_file_path = ShareFilePathFromInode(inode); |
| |
| struct stat smb_stat = {0}; |
| int error = smbc_stat_ctx_(context_, share_file_path.c_str(), &smb_stat); |
| if (error < 0) { |
| request->ReplyError(errno); |
| return; |
| } |
| if (smb_stat.st_mode & S_IFDIR) { |
| request->ReplyError(EISDIR); |
| return; |
| } else if (!(smb_stat.st_mode & S_IFREG)) { |
| VLOG(1) << "Disallowed file mode " << smb_stat.st_mode << " for path " |
| << share_file_path; |
| request->ReplyError(EACCES); |
| return; |
| } |
| struct stat reply_stat = MakeStat(inode, smb_stat); |
| |
| SMBCFILE* file = nullptr; |
| base::ScopedClosureRunner file_closer; |
| if (file_handle) { |
| file = LookupOpenFile(*file_handle); |
| if (!file) { |
| request->ReplyError(EBADF); |
| return; |
| } |
| } else { |
| file = smbc_open_ctx_(context_, share_file_path.c_str(), O_WRONLY, 0); |
| if (!file) { |
| int err = errno; |
| VPLOG(1) << "smbc_open path: " << share_file_path << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| file_closer.ReplaceClosure(base::BindOnce( |
| [](SMBCCTX* context, SMBCFILE* file) { |
| if (smbc_getFunctionClose(context)(context, file) < 0) { |
| PLOG(ERROR) << "smbc_close failed on temporary setattr file"; |
| } |
| }, |
| context_, file)); |
| } |
| |
| if (smbc_ftruncate_ctx_(context_, file, attr.st_size) < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_ftruncate size: " << attr.st_size << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| reply_stat.st_size = attr.st_size; |
| request->ReplyAttr(reply_stat, kAttrTimeoutSeconds); |
| } |
| |
| void SmbFilesystem::Open(std::unique_ptr<OpenRequest> request, |
| fuse_ino_t inode, |
| int flags) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::OpenInternal, base::Unretained(this), |
| std::move(request), inode, flags)); |
| } |
| |
| void SmbFilesystem::OpenInternal(std::unique_ptr<OpenRequest> request, |
| fuse_ino_t inode, |
| int flags) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| if (inode == FUSE_ROOT_ID) { |
| request->ReplyError(EISDIR); |
| return; |
| } |
| |
| const std::string share_file_path = ShareFilePathFromInode(inode); |
| SMBCFILE* file = smbc_open_ctx_(context_, share_file_path.c_str(), flags, 0); |
| if (!file) { |
| int err = errno; |
| VPLOG(1) << "smbc_open on path " << share_file_path << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| request->ReplyOpen(AddOpenFile(file)); |
| } |
| |
| void SmbFilesystem::Create(std::unique_ptr<CreateRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name, |
| mode_t mode, |
| int flags) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::CreateInternal, base::Unretained(this), |
| std::move(request), parent_inode, name, mode, flags)); |
| } |
| |
| void SmbFilesystem::CreateInternal(std::unique_ptr<CreateRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name, |
| mode_t mode, |
| int flags) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| flags |= O_CREAT; |
| mode &= 0777; |
| |
| const base::FilePath parent_path = inode_map_.GetPath(parent_inode); |
| CHECK(!parent_path.empty()) |
| << "Lookup on invalid parent inode: " << parent_inode; |
| const base::FilePath file_path = parent_path.Append(name); |
| const std::string share_file_path = MakeShareFilePath(file_path); |
| |
| // NOTE: |mode| appears to be ignored by libsmbclient. |
| SMBCFILE* file = |
| smbc_open_ctx_(context_, share_file_path.c_str(), flags, mode); |
| if (!file) { |
| int err = errno; |
| VPLOG(1) << "smbc_open path: " << share_file_path << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| uint64_t handle = AddOpenFile(file); |
| |
| ino_t inode = inode_map_.IncInodeRef(file_path); |
| struct stat entry_stat = MakeStat(inode, {0}); |
| entry_stat.st_mode = S_IFREG | mode; |
| fuse_entry_param entry = {0}; |
| entry.ino = inode; |
| entry.generation = 1; |
| entry.attr = entry_stat; |
| entry.attr_timeout = kAttrTimeoutSeconds; |
| entry.entry_timeout = kAttrTimeoutSeconds; |
| request->ReplyCreate(entry, handle); |
| } |
| |
| void SmbFilesystem::Read(std::unique_ptr<BufRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle, |
| size_t size, |
| off_t offset) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::ReadInternal, base::Unretained(this), |
| std::move(request), inode, file_handle, size, offset)); |
| } |
| |
| void SmbFilesystem::ReadInternal(std::unique_ptr<BufRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle, |
| size_t size, |
| off_t offset) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| SMBCFILE* file = LookupOpenFile(file_handle); |
| if (!file) { |
| request->ReplyError(EBADF); |
| return; |
| } |
| |
| if (smbc_lseek_ctx_(context_, file, offset, SEEK_SET) < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_lseek path: " << ShareFilePathFromInode(inode) |
| << ", offset: " << offset << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| std::vector<char> buf(size); |
| ssize_t bytes_read = smbc_read_ctx_(context_, file, buf.data(), size); |
| if (bytes_read < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_read path: " << ShareFilePathFromInode(inode) |
| << " offset: " << offset << ", size: " << size << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| request->ReplyBuf(buf.data(), bytes_read); |
| } |
| |
| void SmbFilesystem::Write(std::unique_ptr<WriteRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle, |
| const char* buf, |
| size_t size, |
| off_t offset) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::WriteInternal, base::Unretained(this), |
| std::move(request), inode, file_handle, |
| std::vector<char>(buf, buf + size), offset)); |
| } |
| |
| void SmbFilesystem::WriteInternal(std::unique_ptr<WriteRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle, |
| const std::vector<char>& buf, |
| off_t offset) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| SMBCFILE* file = LookupOpenFile(file_handle); |
| if (!file) { |
| request->ReplyError(EBADF); |
| return; |
| } |
| |
| if (smbc_lseek_ctx_(context_, file, offset, SEEK_SET) < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_lseek path: " << ShareFilePathFromInode(inode) |
| << ", offset: " << offset << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| ssize_t bytes_written = |
| smbc_write_ctx_(context_, file, buf.data(), buf.size()); |
| if (bytes_written < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_write path: " << ShareFilePathFromInode(inode) |
| << " offset: " << offset << ", size: " << buf.size() << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| request->ReplyWrite(bytes_written); |
| } |
| |
| void SmbFilesystem::Release(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::ReleaseInternal, base::Unretained(this), |
| std::move(request), inode, file_handle)); |
| } |
| |
| void SmbFilesystem::ReleaseInternal(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| SMBCFILE* file = LookupOpenFile(file_handle); |
| if (!file) { |
| request->ReplyError(EBADF); |
| return; |
| } |
| |
| if (smbc_close_ctx_(context_, file) < 0) { |
| request->ReplyError(errno); |
| return; |
| } |
| |
| RemoveOpenFile(file_handle); |
| request->ReplyOk(); |
| } |
| |
| void SmbFilesystem::Rename(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t old_parent_inode, |
| const std::string& old_name, |
| fuse_ino_t new_parent_inode, |
| const std::string& new_name) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::RenameInternal, base::Unretained(this), |
| std::move(request), old_parent_inode, old_name, |
| new_parent_inode, new_name)); |
| } |
| |
| void SmbFilesystem::RenameInternal(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t old_parent_inode, |
| const std::string& old_name, |
| fuse_ino_t new_parent_inode, |
| const std::string& new_name) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| const base::FilePath old_parent_path = inode_map_.GetPath(old_parent_inode); |
| CHECK(!old_parent_path.empty()) |
| << "Lookup on invalid old parent inode: " << old_parent_inode; |
| const base::FilePath new_parent_path = inode_map_.GetPath(new_parent_inode); |
| CHECK(!new_parent_path.empty()) |
| << "Lookup on invalid new parent inode: " << new_parent_inode; |
| |
| const std::string old_share_path = |
| MakeShareFilePath(old_parent_path.Append(old_name)); |
| const std::string new_share_path = |
| MakeShareFilePath(new_parent_path.Append(new_name)); |
| |
| if (smbc_rename_ctx_(context_, old_share_path.c_str(), context_, |
| new_share_path.c_str()) < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_rename old_path: " << old_share_path |
| << " new_path: " << new_share_path << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| request->ReplyOk(); |
| } |
| |
| void SmbFilesystem::Unlink(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::UnlinkInternal, base::Unretained(this), |
| std::move(request), parent_inode, name)); |
| } |
| |
| void SmbFilesystem::UnlinkInternal(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| const base::FilePath parent_path = inode_map_.GetPath(parent_inode); |
| CHECK(!parent_path.empty()) |
| << "Lookup on invalid parent inode: " << parent_inode; |
| const std::string share_file_path = |
| MakeShareFilePath(parent_path.Append(name)); |
| |
| if (smbc_unlink_ctx_(context_, share_file_path.c_str()) < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_unlink path: " << share_file_path << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| request->ReplyOk(); |
| } |
| |
| void SmbFilesystem::OpenDir(std::unique_ptr<OpenRequest> request, |
| fuse_ino_t inode, |
| int flags) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::OpenDirInternal, base::Unretained(this), |
| std::move(request), inode, flags)); |
| } |
| |
| void SmbFilesystem::OpenDirInternal(std::unique_ptr<OpenRequest> request, |
| fuse_ino_t inode, |
| int flags) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| if ((flags & O_ACCMODE) != O_RDONLY) { |
| request->ReplyError(EACCES); |
| return; |
| } |
| |
| const std::string share_dir_path = ShareFilePathFromInode(inode); |
| SMBCFILE* dir = smbc_opendir_ctx_(context_, share_dir_path.c_str()); |
| if (!dir) { |
| request->ReplyError(errno); |
| return; |
| } |
| |
| request->ReplyOpen(AddOpenFile(dir)); |
| } |
| |
| void SmbFilesystem::ReadDir(std::unique_ptr<DirentryRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle, |
| off_t offset) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::ReadDirInternal, base::Unretained(this), |
| std::move(request), inode, file_handle, offset)); |
| } |
| |
| void SmbFilesystem::ReadDirInternal(std::unique_ptr<DirentryRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle, |
| off_t offset) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| if (offset < 0) { |
| // A previous readdir() returned -1 as the next offset, which implies EOF. |
| request->ReplyDone(); |
| return; |
| } |
| |
| SMBCFILE* dir = LookupOpenFile(file_handle); |
| if (!dir) { |
| request->ReplyError(EBADF); |
| return; |
| } |
| const base::FilePath dir_path = inode_map_.GetPath(inode); |
| CHECK(!dir_path.empty()) << "Inode not found: " << inode; |
| |
| int error = smbc_lseekdir_ctx_(context_, dir, offset); |
| if (error < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_lseekdir on path " << dir_path.value() |
| << ", offset: " << offset << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| while (true) { |
| // Explicitly set |errno| to 0 to detect EOF vs. error cases. |
| errno = 0; |
| const smbc_dirent* dirent = smbc_readdir_ctx_(context_, dir); |
| if (!dirent) { |
| if (!errno) { |
| // EOF. |
| break; |
| } |
| int err = errno; |
| VPLOG(1) << "smbc_readdir on path " << dir_path.value() << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| off_t next_offset = smbc_telldir_ctx_(context_, dir); |
| if (next_offset < 0 && errno) { |
| int err = errno; |
| VPLOG(1) << "smbc_telldir on path " << dir_path.value() << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| base::StringPiece filename(dirent->name); |
| if (filename == "." || filename == "..") { |
| // Ignore . and .. since FUSE already takes care of these. |
| continue; |
| } |
| CHECK(!filename.empty()); |
| CHECK_EQ(filename.find("/"), base::StringPiece::npos); |
| mode_t mode; |
| if (dirent->smbc_type == SMBC_FILE) { |
| mode = S_IFREG; |
| } else if (dirent->smbc_type == SMBC_DIR) { |
| mode = S_IFDIR; |
| } else { |
| VLOG(1) << "Ignoring directory entry of unsupported type: " |
| << dirent->smbc_type; |
| continue; |
| } |
| |
| const base::FilePath entry_path = dir_path.Append(filename); |
| ino_t entry_inode = inode_map_.IncInodeRef(entry_path); |
| if (!request->AddEntry(filename, entry_inode, mode, next_offset)) { |
| // Response buffer full. |
| inode_map_.Forget(entry_inode, 1); |
| break; |
| } |
| } |
| |
| request->ReplyDone(); |
| } |
| |
| void SmbFilesystem::ReleaseDir(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::ReleaseDirInternal, base::Unretained(this), |
| std::move(request), inode, file_handle)); |
| } |
| |
| void SmbFilesystem::ReleaseDirInternal(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t inode, |
| uint64_t file_handle) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| SMBCFILE* dir = LookupOpenFile(file_handle); |
| if (!dir) { |
| request->ReplyError(EBADF); |
| return; |
| } |
| |
| if (smbc_closedir_ctx_(context_, dir) < 0) { |
| request->ReplyError(errno); |
| return; |
| } |
| |
| RemoveOpenFile(file_handle); |
| request->ReplyOk(); |
| } |
| |
| void SmbFilesystem::MkDir(std::unique_ptr<EntryRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name, |
| mode_t mode) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::MkDirInternal, base::Unretained(this), |
| std::move(request), parent_inode, name, mode)); |
| } |
| |
| void SmbFilesystem::MkDirInternal(std::unique_ptr<EntryRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name, |
| mode_t mode) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| const base::FilePath parent_path = inode_map_.GetPath(parent_inode); |
| CHECK(!parent_path.empty()) |
| << "Lookup on invalid parent inode: " << parent_inode; |
| const base::FilePath file_path = parent_path.Append(name); |
| const std::string share_file_path = MakeShareFilePath(file_path); |
| |
| if (smbc_mkdir_ctx_(context_, share_file_path.c_str(), mode) < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_mkdir path: " << share_file_path << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| ino_t inode = inode_map_.IncInodeRef(file_path); |
| struct stat entry_stat = MakeStat(inode, {0}); |
| entry_stat.st_mode = S_IFDIR | mode; |
| fuse_entry_param entry = {0}; |
| entry.ino = inode; |
| entry.generation = 1; |
| entry.attr = entry_stat; |
| entry.attr_timeout = kAttrTimeoutSeconds; |
| entry.entry_timeout = kAttrTimeoutSeconds; |
| request->ReplyEntry(entry); |
| } |
| |
| void SmbFilesystem::RmDir(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name) { |
| samba_thread_.task_runner()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&SmbFilesystem::RmDirinternal, base::Unretained(this), |
| std::move(request), parent_inode, name)); |
| } |
| |
| void SmbFilesystem::RmDirinternal(std::unique_ptr<SimpleRequest> request, |
| fuse_ino_t parent_inode, |
| const std::string& name) { |
| if (request->IsInterrupted()) { |
| return; |
| } |
| |
| const base::FilePath parent_path = inode_map_.GetPath(parent_inode); |
| CHECK(!parent_path.empty()) |
| << "Lookup on invalid parent inode: " << parent_inode; |
| const base::FilePath file_path = parent_path.Append(name); |
| const std::string share_file_path = MakeShareFilePath(file_path); |
| |
| if (smbc_rmdir_ctx_(context_, share_file_path.c_str()) < 0) { |
| int err = errno; |
| VPLOG(1) << "smbc_rmdir path: " << share_file_path << " failed"; |
| request->ReplyError(err); |
| return; |
| } |
| |
| request->ReplyOk(); |
| } |
| |
| std::ostream& operator<<(std::ostream& out, SmbFilesystem::ConnectError error) { |
| switch (error) { |
| case SmbFilesystem::ConnectError::kOk: |
| return out << "kOk"; |
| case SmbFilesystem::ConnectError::kNotFound: |
| return out << "kNotFound"; |
| case SmbFilesystem::ConnectError::kAccessDenied: |
| return out << "kAccessDenied"; |
| case SmbFilesystem::ConnectError::kSmb1Unsupported: |
| return out << "kSmb1Unsupported"; |
| case SmbFilesystem::ConnectError::kUnknownError: |
| return out << "kUnknownError"; |
| default: |
| NOTREACHED(); |
| return out << "INVALID_ERROR"; |
| } |
| } |
| |
| } // namespace smbfs |
