parent
0d1be4abe2
commit
6a43f3c11a
|
@ -188,7 +188,8 @@ class Genode::Id_space : public Noncopyable
|
|||
* \throw Unknown_id
|
||||
*/
|
||||
template <typename ARG, typename FUNC>
|
||||
void apply(Id id, FUNC const &fn)
|
||||
auto apply(Id id, FUNC const &fn)
|
||||
-> typename Trait::Functor<decltype(&FUNC::operator())>::Return_type
|
||||
{
|
||||
T *obj = nullptr;
|
||||
{
|
||||
|
@ -201,7 +202,7 @@ class Genode::Id_space : public Noncopyable
|
|||
obj = &e->_obj;
|
||||
}
|
||||
if (obj)
|
||||
fn(static_cast<ARG &>(*obj));
|
||||
return fn(static_cast<ARG &>(*obj));
|
||||
else
|
||||
throw Unknown_id();
|
||||
}
|
||||
|
|
|
@ -26,11 +26,11 @@
|
|||
#include "file.h"
|
||||
#include "symlink.h"
|
||||
|
||||
namespace File_system {
|
||||
namespace Rump_fs {
|
||||
class Directory;
|
||||
}
|
||||
|
||||
class File_system::Directory : public Node
|
||||
class Rump_fs::Directory : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -106,14 +106,14 @@ class File_system::Directory : public Node
|
|||
rump_sys_close(_fd);
|
||||
}
|
||||
|
||||
int fd() const { return _fd; }
|
||||
int fd() const override { return _fd; }
|
||||
|
||||
File * file(char const *name, Mode mode, bool create)
|
||||
File * file(char const *name, Mode mode, bool create) override
|
||||
{
|
||||
return new (&_alloc) File(_fd, name, mode, create);
|
||||
}
|
||||
|
||||
Symlink * symlink(char const *name, bool create)
|
||||
Symlink * symlink(char const *name, bool create) override
|
||||
{
|
||||
return new (&_alloc) Symlink(_path.base(), name, create);
|
||||
}
|
||||
|
@ -148,7 +148,7 @@ class File_system::Directory : public Node
|
|||
return node;
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
if (len < sizeof(Directory_entry)) {
|
||||
Genode::error("read buffer too small for directory entry");
|
||||
|
@ -222,12 +222,22 @@ class File_system::Directory : public Node
|
|||
return sizeof(Directory_entry);
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* writing to directory nodes is not supported */
|
||||
return 0;
|
||||
}
|
||||
|
||||
Status status() override
|
||||
{
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = num_entries() * sizeof (Directory_entry);
|
||||
s.mode = File_system::Status::MODE_DIRECTORY;
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
size_t num_entries() const
|
||||
{
|
||||
int bytes = 0;
|
||||
|
@ -247,7 +257,7 @@ class File_system::Directory : public Node
|
|||
return count;
|
||||
}
|
||||
|
||||
void unlink(char const *path)
|
||||
void unlink(char const *path) override
|
||||
{
|
||||
Path node_path(path, _path.base());
|
||||
|
||||
|
|
|
@ -21,11 +21,11 @@
|
|||
|
||||
#include "node.h"
|
||||
|
||||
namespace File_system {
|
||||
namespace Rump_fs {
|
||||
class File;
|
||||
}
|
||||
|
||||
class File_system::File : public Node
|
||||
class Rump_fs::File : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -114,7 +114,7 @@ class File_system::File : public Node
|
|||
|
||||
virtual ~File() { rump_sys_close(_fd); }
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
ssize_t ret;
|
||||
|
||||
|
@ -127,7 +127,7 @@ class File_system::File : public Node
|
|||
return ret == -1 ? 0 : ret;
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
ssize_t ret;
|
||||
|
||||
|
@ -140,6 +140,17 @@ class File_system::File : public Node
|
|||
return ret == -1 ? 0 : ret;
|
||||
}
|
||||
|
||||
virtual Status status() override
|
||||
{
|
||||
Status s;
|
||||
|
||||
s.inode = inode();
|
||||
s.size = length();
|
||||
s.mode = File_system::Status::MODE_FILE;
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
file_size_t length() const
|
||||
{
|
||||
struct stat s;
|
||||
|
@ -150,7 +161,7 @@ class File_system::File : public Node
|
|||
return s.st_size;
|
||||
}
|
||||
|
||||
void truncate(file_size_t size)
|
||||
void truncate(file_size_t size) override
|
||||
{
|
||||
rump_sys_ftruncate(_fd, size);
|
||||
|
||||
|
|
|
@ -13,7 +13,7 @@
|
|||
*/
|
||||
|
||||
/* Genode includes */
|
||||
#include <file_system/node_handle_registry.h>
|
||||
#include <file_system/open_node.h>
|
||||
#include <file_system_session/rpc_object.h>
|
||||
#include <base/attached_rom_dataspace.h>
|
||||
#include <timer_session/connection.h>
|
||||
|
@ -30,19 +30,25 @@
|
|||
#include "file_system.h"
|
||||
#include "directory.h"
|
||||
|
||||
namespace File_system {
|
||||
namespace Rump_fs {
|
||||
|
||||
using File_system::Packet_descriptor;
|
||||
using File_system::Path;
|
||||
|
||||
struct Main;
|
||||
struct Root;
|
||||
struct Session_component;
|
||||
}
|
||||
|
||||
class File_system::Session_component : public Session_rpc_object
|
||||
class Rump_fs::Session_component : public Session_rpc_object
|
||||
{
|
||||
private:
|
||||
|
||||
typedef File_system::Open_node<Node> Open_node;
|
||||
|
||||
Allocator &_md_alloc;
|
||||
Directory &_root;
|
||||
Node_handle_registry _handle_registry;
|
||||
Id_space<File_system::Node> _open_node_registry;
|
||||
bool _writable;
|
||||
|
||||
Signal_handler<Session_component> _process_packet_handler;
|
||||
|
@ -57,7 +63,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
*
|
||||
* \return true on success, false on failure
|
||||
*/
|
||||
void _process_packet_op(Packet_descriptor &packet, Node &node)
|
||||
void _process_packet_op(Packet_descriptor &packet, Open_node &open_node)
|
||||
{
|
||||
void * const content = tx_sink()->packet_content(packet);
|
||||
size_t const length = packet.length();
|
||||
|
@ -69,18 +75,18 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
case Packet_descriptor::READ:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.read((char *)content, length, packet.position());
|
||||
res_length = open_node.node().read((char *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::WRITE:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.write((char const *)content, length, packet.position());
|
||||
res_length = open_node.node().write((char const *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::CONTENT_CHANGED:
|
||||
_handle_registry.register_notify(*tx_sink(), packet.handle());
|
||||
open_node.register_notify(*tx_sink());
|
||||
/* notify_listeners may bounce the packet back*/
|
||||
node.notify_listeners();
|
||||
open_node.node().notify_listeners();
|
||||
/* otherwise defer acknowledgement of this packet */
|
||||
return;
|
||||
|
||||
|
@ -101,12 +107,16 @@ class File_system::Session_component : public Session_rpc_object
|
|||
/* assume failure by default */
|
||||
packet.succeeded(false);
|
||||
|
||||
try {
|
||||
Node *node = _handle_registry.lookup(packet.handle());
|
||||
auto process_packet_fn = [&] (Open_node &open_node) {
|
||||
_process_packet_op(packet, open_node);
|
||||
};
|
||||
|
||||
_process_packet_op(packet, *node);
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(packet.handle(), process_packet_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
Genode::error("Invalid_handle");
|
||||
tx_sink()->acknowledge_packet(packet);
|
||||
}
|
||||
catch (Invalid_handle) { Genode::error("Invalid_handle"); }
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -189,14 +199,29 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_name(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup(dir_handle);
|
||||
auto file_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (!_writable)
|
||||
if (create || (mode != STAT_ONLY && mode != READ_ONLY))
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = dir->file(name.string(), mode, create);
|
||||
return _handle_registry.alloc(file);
|
||||
File *file = dir.file(name.string(), mode, create);
|
||||
|
||||
Open_node *open_file =
|
||||
new (_md_alloc) Open_node(*file, _open_node_registry);
|
||||
|
||||
return open_file->id();
|
||||
};
|
||||
|
||||
try {
|
||||
return File_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, file_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Symlink_handle symlink(Dir_handle dir_handle, Name const &name, bool create)
|
||||
|
@ -207,13 +232,28 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_name(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup(dir_handle);
|
||||
auto symlink_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (create && !_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
Symlink *link = dir->symlink(name.string(), create);
|
||||
return _handle_registry.alloc(link);
|
||||
Symlink *link = dir.symlink(name.string(), create);
|
||||
|
||||
Open_node *open_symlink =
|
||||
new (_md_alloc) Open_node(*link, _open_node_registry);
|
||||
|
||||
return open_symlink->id();
|
||||
};
|
||||
|
||||
try {
|
||||
return Symlink_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, symlink_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Dir_handle dir(Path const &path, bool create)
|
||||
|
@ -231,7 +271,11 @@ class File_system::Session_component : public Session_rpc_object
|
|||
throw Name_too_long();
|
||||
|
||||
Directory *dir = _root.subdir(path_str, create);
|
||||
return _handle_registry.alloc(dir);
|
||||
|
||||
Open_node *open_dir =
|
||||
new (_md_alloc) Open_node(*dir, _open_node_registry);
|
||||
|
||||
return Dir_handle { open_dir->id().value };
|
||||
}
|
||||
|
||||
Node_handle node(Path const &path)
|
||||
|
@ -240,55 +284,39 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
_assert_valid_path(path_str);
|
||||
Node *node = _root.node(path_str + 1);
|
||||
Node_handle h = _handle_registry.alloc(node);
|
||||
return h;
|
||||
|
||||
Open_node *open_node =
|
||||
new (_md_alloc) Open_node(*node, _open_node_registry);
|
||||
|
||||
return open_node->id();
|
||||
}
|
||||
|
||||
void close(Node_handle handle)
|
||||
{
|
||||
Node *node = 0;
|
||||
auto close_fn = [&] (Open_node &open_node) {
|
||||
Node &node = open_node.node();
|
||||
destroy(_md_alloc, &open_node);
|
||||
destroy(_md_alloc, &node);
|
||||
};
|
||||
|
||||
try {
|
||||
node = _handle_registry.lookup(handle);
|
||||
} catch (Invalid_handle) { return; }
|
||||
|
||||
_handle_registry.free(handle);
|
||||
/* destruct node */
|
||||
if (node)
|
||||
destroy(&_md_alloc, node);
|
||||
_open_node_registry.apply<Open_node>(handle, close_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Status status(Node_handle node_handle)
|
||||
{
|
||||
Node *node = _handle_registry.lookup(node_handle);
|
||||
Status s;
|
||||
s.inode = node->inode();
|
||||
s.size = 0;
|
||||
s.mode = 0;
|
||||
auto status_fn = [&] (Open_node &open_node) {
|
||||
return open_node.node().status();
|
||||
};
|
||||
|
||||
|
||||
File *file = dynamic_cast<File *>(node);
|
||||
if (file) {
|
||||
s.size = file->length();
|
||||
s.mode = File_system::Status::MODE_FILE;
|
||||
return s;
|
||||
try {
|
||||
return _open_node_registry.apply<Open_node>(node_handle, status_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
|
||||
Directory *dir = dynamic_cast<Directory *>(node);
|
||||
if (dir) {
|
||||
s.size = dir->num_entries()*sizeof(Directory_entry);
|
||||
s.mode = File_system::Status::MODE_DIRECTORY;
|
||||
return s;
|
||||
}
|
||||
|
||||
Symlink *link = dynamic_cast<Symlink *>(node);
|
||||
if (link) {
|
||||
s.size = link->length();
|
||||
s.mode = File_system::Status::MODE_SYMLINK;
|
||||
return s;
|
||||
}
|
||||
|
||||
return Status();
|
||||
}
|
||||
|
||||
void control(Node_handle, Control) override { }
|
||||
|
@ -301,8 +329,16 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
Directory *dir = _handle_registry.lookup(dir_handle);
|
||||
dir->unlink(name.string());
|
||||
auto unlink_fn = [&] (Open_node &open_node) {
|
||||
Node &dir = open_node.node();
|
||||
dir.unlink(name.string());
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, unlink_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void truncate(File_handle file_handle, file_size_t size)
|
||||
|
@ -310,8 +346,15 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = _handle_registry.lookup(file_handle);
|
||||
file->truncate(size);
|
||||
auto truncate_fn = [&] (Open_node &open_node) {
|
||||
open_node.node().truncate(size);
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(file_handle, truncate_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void move(Dir_handle from_dir_handle, Name const &from_name,
|
||||
|
@ -320,23 +363,26 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
auto move_fn = [&] (Open_node &open_from_dir_node) {
|
||||
|
||||
auto inner_move_fn = [&] (Open_node &open_to_dir_node) {
|
||||
|
||||
Node &from_dir = open_from_dir_node.node();
|
||||
Node &to_dir = open_to_dir_node.node();
|
||||
|
||||
char const *from_str = from_name.string();
|
||||
char const *to_str = to_name.string();
|
||||
|
||||
if (!(valid_name(from_str) && valid_name(to_str)))
|
||||
throw Lookup_failed();
|
||||
|
||||
Directory *from_dir = _handle_registry.lookup(from_dir_handle);
|
||||
Directory *to_dir = _handle_registry.lookup( to_dir_handle);
|
||||
|
||||
if (rump_sys_renameat(from_dir->fd(), from_str,
|
||||
to_dir->fd(), to_str) == 0) {
|
||||
from_dir->mark_as_updated();
|
||||
from_dir->notify_listeners();
|
||||
if (!_handle_registry.refer_to_same_node(from_dir_handle,
|
||||
to_dir_handle)) {
|
||||
to_dir->mark_as_updated();
|
||||
to_dir->notify_listeners();
|
||||
if (rump_sys_renameat(from_dir.fd(), from_str,
|
||||
to_dir.fd(), to_str) == 0) {
|
||||
from_dir.mark_as_updated();
|
||||
from_dir.notify_listeners();
|
||||
if (&from_dir != &to_dir) {
|
||||
to_dir.mark_as_updated();
|
||||
to_dir.notify_listeners();
|
||||
}
|
||||
|
||||
return;
|
||||
|
@ -349,12 +395,27 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
Genode::warning("renameat produced unhandled error ", errno, ", ", from_str, " -> ", to_str);
|
||||
throw Permission_denied();
|
||||
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(to_dir_handle, inner_move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(from_dir_handle, move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void sync(Node_handle) override { rump_sys_sync(); }
|
||||
};
|
||||
|
||||
class File_system::Root : public Root_component<Session_component>
|
||||
class Rump_fs::Root : public Root_component<Session_component>
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -453,7 +514,7 @@ class File_system::Root : public Root_component<Session_component>
|
|||
};
|
||||
|
||||
|
||||
struct File_system::Main
|
||||
struct Rump_fs::Main
|
||||
{
|
||||
Genode::Env &env;
|
||||
|
||||
|
@ -516,5 +577,5 @@ void Component::construct(Genode::Env &env)
|
|||
/* XXX execute constructors of global statics (uses shared objects) */
|
||||
env.exec_static_constructors();
|
||||
|
||||
static File_system::Main inst(env);
|
||||
static Rump_fs::Main inst(env);
|
||||
}
|
||||
|
|
|
@ -18,16 +18,20 @@
|
|||
|
||||
/* Genode includes */
|
||||
#include <file_system/node.h>
|
||||
#include <util/list.h>
|
||||
#include <base/signal.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Rump_fs {
|
||||
using namespace File_system;
|
||||
using namespace Genode;
|
||||
using Genode::size_t;
|
||||
class Node;
|
||||
class File;
|
||||
class Directory;
|
||||
class Symlink;
|
||||
}
|
||||
|
||||
class File_system::Node : public Node_base, public List<Node>::Element
|
||||
class Rump_fs::Node : public Node_base
|
||||
{
|
||||
public:
|
||||
|
||||
|
@ -52,6 +56,41 @@ class File_system::Node : public Node_base, public List<Node>::Element
|
|||
|
||||
virtual size_t read(char *dst, size_t len, seek_off_t) = 0;
|
||||
virtual size_t write(char const *src, size_t len, seek_off_t) = 0;
|
||||
virtual Status status() = 0;
|
||||
|
||||
/*
|
||||
* Directory functionality
|
||||
*/
|
||||
virtual int fd() const
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return -1;
|
||||
}
|
||||
|
||||
virtual File *file(char const *name, Mode mode, bool create)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
virtual Symlink *symlink(char const *name, bool create)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
virtual void unlink(char const *path)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
}
|
||||
|
||||
/*
|
||||
* File functionality
|
||||
*/
|
||||
virtual void truncate(file_size_t size)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-file node");
|
||||
}
|
||||
};
|
||||
|
||||
#endif /* _NODE_H_ */
|
||||
|
|
|
@ -20,11 +20,11 @@
|
|||
|
||||
#include "node.h"
|
||||
|
||||
namespace File_system {
|
||||
namespace Rump_fs {
|
||||
class Symlink;
|
||||
}
|
||||
|
||||
class File_system::Symlink : public Node
|
||||
class Rump_fs::Symlink : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -47,7 +47,7 @@ class File_system::Symlink : public Node
|
|||
Node::name(basename(path));
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* Ideal symlink operations are atomic. */
|
||||
if (!_create || seek_offset)
|
||||
|
@ -60,12 +60,22 @@ class File_system::Symlink : public Node
|
|||
return ret == -1 ? 0 : ret;
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
int ret = rump_sys_readlink(_path.base(), dst, len);
|
||||
return ret == -1 ? 0 : ret;
|
||||
}
|
||||
|
||||
Status status() override
|
||||
{
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = length();
|
||||
s.mode = File_system::Status::MODE_SYMLINK;
|
||||
|
||||
return s;
|
||||
}
|
||||
|
||||
file_size_t length()
|
||||
{
|
||||
char link_to[MAX_PATH_LEN];
|
||||
|
|
|
@ -4,6 +4,13 @@
|
|||
* \date 2012-07-04
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _DIRECTORY_H_
|
||||
#define _DIRECTORY_H_
|
||||
|
||||
|
@ -16,11 +23,12 @@ namespace Ffat { extern "C" {
|
|||
#include <node.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
|
||||
namespace Ffat_fs {
|
||||
using namespace Genode;
|
||||
class Directory;
|
||||
}
|
||||
|
||||
class Directory : public Node
|
||||
class Ffat_fs::Directory : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -111,6 +119,5 @@ namespace File_system {
|
|||
}
|
||||
|
||||
};
|
||||
}
|
||||
|
||||
#endif /* _DIRECTORY_H_ */
|
||||
|
|
|
@ -4,6 +4,13 @@
|
|||
* \date 2012-07-04
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _FILE_H_
|
||||
#define _FILE_H_
|
||||
|
||||
|
@ -16,9 +23,11 @@ namespace Ffat { extern "C" {
|
|||
#include <node.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Ffat_fs {
|
||||
class File;
|
||||
}
|
||||
|
||||
class File : public Node
|
||||
class Ffat_fs::File : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -28,10 +37,38 @@ namespace File_system {
|
|||
|
||||
File(const char *name) : Node(name) { }
|
||||
|
||||
~File()
|
||||
{
|
||||
using namespace Ffat;
|
||||
|
||||
FRESULT res = f_close(&_ffat_fil);
|
||||
|
||||
switch(res) {
|
||||
case FR_OK:
|
||||
return;
|
||||
case FR_INVALID_OBJECT:
|
||||
error("f_close() failed with error code FR_INVALID_OBJECT");
|
||||
return;
|
||||
case FR_DISK_ERR:
|
||||
error("f_close() failed with error code FR_DISK_ERR");
|
||||
return;
|
||||
case FR_INT_ERR:
|
||||
error("f_close() failed with error code FR_INT_ERR");
|
||||
return;
|
||||
case FR_NOT_READY:
|
||||
error("f_close() failed with error code FR_NOT_READY");
|
||||
return;
|
||||
default:
|
||||
/* not supposed to occur according to the libffat documentation */
|
||||
error("f_close() returned an unexpected error code");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void ffat_fil(Ffat::FIL ffat_fil) { _ffat_fil = ffat_fil; }
|
||||
Ffat::FIL *ffat_fil() { return &_ffat_fil; }
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
using namespace Ffat;
|
||||
|
||||
|
@ -90,7 +127,7 @@ namespace File_system {
|
|||
}
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
using namespace Ffat;
|
||||
|
||||
|
@ -149,7 +186,73 @@ namespace File_system {
|
|||
}
|
||||
}
|
||||
|
||||
};
|
||||
void truncate(file_size_t size) override
|
||||
{
|
||||
using namespace Ffat;
|
||||
|
||||
/*
|
||||
* This macro is defined in later versions of the FatFs lib, but not in the
|
||||
* one currently used for Genode.
|
||||
*/
|
||||
#define f_tell(fp) ((fp)->fptr)
|
||||
|
||||
/* 'f_truncate()' truncates to the current seek pointer */
|
||||
|
||||
FRESULT res = f_lseek(&_ffat_fil, size);
|
||||
|
||||
switch(res) {
|
||||
case FR_OK:
|
||||
/* according to the FatFs documentation this can happen */
|
||||
if (f_tell(&_ffat_fil) != size) {
|
||||
error("f_lseek() could not seek to offset ", size);
|
||||
return;
|
||||
}
|
||||
break;
|
||||
case FR_DISK_ERR:
|
||||
error("f_lseek() failed with error code FR_DISK_ERR");
|
||||
return;
|
||||
case FR_INT_ERR:
|
||||
error("f_lseek() failed with error code FR_INT_ERR");
|
||||
return;
|
||||
case FR_NOT_READY:
|
||||
error("f_lseek() failed with error code FR_NOT_READY");
|
||||
return;
|
||||
case FR_INVALID_OBJECT:
|
||||
error("f_lseek() failed with error code FR_INVALID_OBJECT");
|
||||
throw Invalid_handle();
|
||||
default:
|
||||
/* not supposed to occur according to the libffat documentation */
|
||||
error("f_lseek() returned an unexpected error code");
|
||||
return;
|
||||
}
|
||||
|
||||
res = f_truncate(&_ffat_fil);
|
||||
|
||||
switch(res) {
|
||||
case FR_OK:
|
||||
return;
|
||||
case FR_INVALID_OBJECT:
|
||||
error("f_truncate() failed with error code FR_INVALID_OBJECT");
|
||||
throw Invalid_handle();
|
||||
case FR_DISK_ERR:
|
||||
error("f_truncate() failed with error code FR_DISK_ERR");
|
||||
return;
|
||||
case FR_INT_ERR:
|
||||
error("f_truncate() failed with error code FR_INT_ERR");
|
||||
return;
|
||||
case FR_NOT_READY:
|
||||
error("f_truncate() failed with error code FR_NOT_READY");
|
||||
return;
|
||||
case FR_TIMEOUT:
|
||||
error("f_truncate() failed with error code FR_TIMEOUT");
|
||||
return;
|
||||
default:
|
||||
/* not supposed to occur according to the libffat documentation */
|
||||
error("f_truncate() returned an unexpected error code");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
#endif /* _FILE_H_ */
|
||||
|
|
|
@ -13,7 +13,7 @@
|
|||
|
||||
/* Genode includes */
|
||||
#include <base/component.h>
|
||||
#include <file_system/node_handle_registry.h>
|
||||
#include <file_system/open_node.h>
|
||||
#include <file_system_session/rpc_object.h>
|
||||
#include <root/component.h>
|
||||
#include <base/attached_rom_dataspace.h>
|
||||
|
@ -35,35 +35,34 @@ namespace Ffat { extern "C" {
|
|||
#include <ffat/ff.h>
|
||||
} }
|
||||
|
||||
/*
|
||||
* This macro is defined in later versions of the FatFs lib, but not in the
|
||||
* one currently used for Genode.
|
||||
*/
|
||||
#define f_tell(fp) ((fp)->fptr)
|
||||
|
||||
|
||||
using namespace Genode;
|
||||
|
||||
|
||||
static Lock _ffat_lock;
|
||||
typedef Lock_guard<Lock> Ffat_lock_guard;
|
||||
|
||||
|
||||
/*************************
|
||||
** File-system service **
|
||||
*************************/
|
||||
|
||||
namespace File_system {
|
||||
namespace Ffat_fs {
|
||||
|
||||
class Session_component : public Session_rpc_object
|
||||
using namespace Genode;
|
||||
using File_system::Exception;
|
||||
using File_system::Packet_descriptor;
|
||||
using File_system::Path;
|
||||
|
||||
class Session_component;
|
||||
class Root;
|
||||
struct Main;
|
||||
}
|
||||
|
||||
class Ffat_fs::Session_component : public Session_rpc_object
|
||||
{
|
||||
private:
|
||||
|
||||
typedef File_system::Open_node<Node> Open_node;
|
||||
|
||||
Genode::Env &_env;
|
||||
Genode::Allocator &_heap;
|
||||
|
||||
Directory &_root;
|
||||
Node_handle_registry _handle_registry;
|
||||
Id_space<File_system::Node> _open_node_registry;
|
||||
bool _writable;
|
||||
|
||||
Signal_handler<Session_component> _process_packet_dispatcher;
|
||||
|
@ -77,7 +76,7 @@ namespace File_system {
|
|||
*
|
||||
* \return true on success, false on failure
|
||||
*/
|
||||
void _process_packet_op(Packet_descriptor &packet, Node &node)
|
||||
void _process_packet_op(Packet_descriptor &packet, Open_node &open_node)
|
||||
{
|
||||
void * const content = tx_sink()->packet_content(packet);
|
||||
size_t const length = packet.length();
|
||||
|
@ -91,18 +90,21 @@ namespace File_system {
|
|||
/* resulting length */
|
||||
size_t res_length = 0;
|
||||
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
switch (packet.operation()) {
|
||||
|
||||
case Packet_descriptor::READ:
|
||||
res_length = node.read((char *)content, length, offset);
|
||||
res_length = open_node.node().read((char *)content, length, offset);
|
||||
break;
|
||||
|
||||
case Packet_descriptor::WRITE:
|
||||
res_length = node.write((char const *)content, length, offset);
|
||||
res_length = open_node.node().write((char const *)content, length, offset);
|
||||
break;
|
||||
|
||||
case Packet_descriptor::CONTENT_CHANGED:
|
||||
open_node.register_notify(*tx_sink());
|
||||
open_node.node().notify_listeners();
|
||||
return;
|
||||
|
||||
case Packet_descriptor::READ_READY:
|
||||
/* not supported */
|
||||
break;
|
||||
|
@ -119,11 +121,15 @@ namespace File_system {
|
|||
/* assume failure by default */
|
||||
packet.succeeded(false);
|
||||
|
||||
auto process_packet_fn = [&] (Open_node &open_node) {
|
||||
_process_packet_op(packet, open_node);
|
||||
};
|
||||
|
||||
try {
|
||||
Node *node = _handle_registry.lookup(packet.handle());
|
||||
_process_packet_op(packet, *node);
|
||||
_open_node_registry.apply<Open_node>(packet.handle(), process_packet_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
Genode::error("Invalid_handle");
|
||||
}
|
||||
catch (Invalid_handle) { error("Invalid_handle"); }
|
||||
|
||||
/*
|
||||
* The 'acknowledge_packet' function cannot block because we
|
||||
|
@ -211,11 +217,11 @@ namespace File_system {
|
|||
File_handle file(Dir_handle dir_handle, Name const &name,
|
||||
Mode mode, bool create)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
if (!valid_filename(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
auto file_fn = [&] (Open_node &open_node) {
|
||||
|
||||
using namespace Ffat;
|
||||
|
||||
FIL ffat_fil;
|
||||
|
@ -237,7 +243,7 @@ namespace File_system {
|
|||
Absolute_path absolute_path(_root.name());
|
||||
|
||||
try {
|
||||
absolute_path.append(_handle_registry.lookup(dir_handle)->name());
|
||||
absolute_path.append(open_node.node().name());
|
||||
absolute_path.append("/");
|
||||
absolute_path.append(name.string());
|
||||
} catch (Path_base::Path_too_long) {
|
||||
|
@ -250,7 +256,11 @@ namespace File_system {
|
|||
case FR_OK: {
|
||||
File *file_node = new (&_heap) File(absolute_path.base());
|
||||
file_node->ffat_fil(ffat_fil);
|
||||
return _handle_registry.alloc(file_node);
|
||||
|
||||
Open_node *open_file =
|
||||
new (_heap) Open_node(*file_node, _open_node_registry);
|
||||
|
||||
return open_file->id();
|
||||
}
|
||||
case FR_NO_FILE:
|
||||
case FR_NO_PATH:
|
||||
|
@ -283,6 +293,15 @@ namespace File_system {
|
|||
error("f_open() returned an unexpected error code");
|
||||
throw Lookup_failed();
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
return File_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, file_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Symlink_handle symlink(Dir_handle, Name const &name, bool create)
|
||||
|
@ -293,8 +312,6 @@ namespace File_system {
|
|||
|
||||
Dir_handle dir(Path const &path, bool create)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
if (create && !_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
|
@ -370,9 +387,14 @@ namespace File_system {
|
|||
|
||||
try {
|
||||
switch(f_opendir_res) {
|
||||
case FR_OK:
|
||||
case FR_OK: {
|
||||
dir_node->ffat_dir(ffat_dir);
|
||||
return _handle_registry.alloc(dir_node);
|
||||
|
||||
Open_node *open_dir =
|
||||
new (_heap) Open_node(*dir_node, _open_node_registry);
|
||||
|
||||
return Dir_handle { open_dir->id().value };
|
||||
}
|
||||
case FR_NO_PATH:
|
||||
throw Lookup_failed();
|
||||
case FR_INVALID_NAME:
|
||||
|
@ -407,8 +429,6 @@ namespace File_system {
|
|||
|
||||
Node_handle node(Path const &path)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
if (!valid_path(path.string()))
|
||||
throw Lookup_failed();
|
||||
|
||||
|
@ -471,79 +491,49 @@ namespace File_system {
|
|||
}
|
||||
}
|
||||
|
||||
return _handle_registry.alloc(node);
|
||||
Open_node *open_node =
|
||||
new (_heap) Open_node(*node, _open_node_registry);
|
||||
|
||||
return open_node->id();
|
||||
}
|
||||
|
||||
void close(Node_handle handle)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
Node *node;
|
||||
auto close_fn = [&] (Open_node &open_node) {
|
||||
Node &node = open_node.node();
|
||||
destroy(_heap, &open_node);
|
||||
destroy(_heap, &node);
|
||||
};
|
||||
|
||||
try {
|
||||
node = _handle_registry.lookup(handle);
|
||||
} catch(Invalid_handle) {
|
||||
error("close() called with invalid handle");
|
||||
return;
|
||||
}
|
||||
|
||||
/* free the handle */
|
||||
_handle_registry.free(handle);
|
||||
|
||||
File *file = dynamic_cast<File *>(node);
|
||||
if (file) {
|
||||
using namespace Ffat;
|
||||
|
||||
FRESULT res = f_close(file->ffat_fil());
|
||||
|
||||
/* free the node */
|
||||
destroy(&_heap, file);
|
||||
|
||||
switch(res) {
|
||||
case FR_OK:
|
||||
return;
|
||||
case FR_INVALID_OBJECT:
|
||||
error("f_close() failed with error code FR_INVALID_OBJECT");
|
||||
return;
|
||||
case FR_DISK_ERR:
|
||||
error("f_close() failed with error code FR_DISK_ERR");
|
||||
return;
|
||||
case FR_INT_ERR:
|
||||
error("f_close() failed with error code FR_INT_ERR");
|
||||
return;
|
||||
case FR_NOT_READY:
|
||||
error("f_close() failed with error code FR_NOT_READY");
|
||||
return;
|
||||
default:
|
||||
/* not supposed to occur according to the libffat documentation */
|
||||
error("f_close() returned an unexpected error code");
|
||||
return;
|
||||
}
|
||||
_open_node_registry.apply<Open_node>(handle, close_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Status status(Node_handle node_handle)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
auto status_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Status status;
|
||||
status.inode = 1;
|
||||
status.size = 0;
|
||||
status.mode = 0;
|
||||
|
||||
Node *node = _handle_registry.lookup(node_handle);
|
||||
Node &node = open_node.node();
|
||||
|
||||
using namespace Ffat;
|
||||
|
||||
/* f_stat() does not work for the '/' directory */
|
||||
if (!is_root(node->name())) {
|
||||
if (!is_root(node.name())) {
|
||||
|
||||
FILINFO ffat_file_info;
|
||||
/* the long file name is not used in this function */
|
||||
ffat_file_info.lfname = 0;
|
||||
ffat_file_info.lfsize = 0;
|
||||
|
||||
FRESULT res = f_stat(node->name(), &ffat_file_info);
|
||||
FRESULT res = f_stat(node.name(), &ffat_file_info);
|
||||
|
||||
switch(res) {
|
||||
case FR_OK:
|
||||
|
@ -597,7 +587,7 @@ namespace File_system {
|
|||
/* determine the number of directory entries */
|
||||
|
||||
Ffat::DIR ffat_dir;
|
||||
FRESULT f_opendir_res = f_opendir(&ffat_dir, node->name());
|
||||
FRESULT f_opendir_res = f_opendir(&ffat_dir, node.name());
|
||||
|
||||
if (f_opendir_res != FR_OK)
|
||||
return status;
|
||||
|
@ -619,26 +609,33 @@ namespace File_system {
|
|||
}
|
||||
|
||||
return status;
|
||||
};
|
||||
|
||||
try {
|
||||
return _open_node_registry.apply<Open_node>(node_handle, status_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void control(Node_handle, Control) { }
|
||||
|
||||
void unlink(Dir_handle dir_handle, Name const &name)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
if (!valid_filename(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
auto unlink_fn = [&] (Open_node &open_node) {
|
||||
|
||||
using namespace Ffat;
|
||||
|
||||
Absolute_path absolute_path(_root.name());
|
||||
|
||||
try {
|
||||
absolute_path.append(_handle_registry.lookup(dir_handle)->name());
|
||||
absolute_path.append(open_node.node().name());
|
||||
absolute_path.append("/");
|
||||
absolute_path.append(name.string());
|
||||
} catch (Path_base::Path_too_long) {
|
||||
|
@ -679,81 +676,34 @@ namespace File_system {
|
|||
error("f_unlink() returned an unexpected error code");
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, unlink_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void truncate(File_handle file_handle, file_size_t size)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = _handle_registry.lookup(file_handle);
|
||||
auto truncate_fn = [&] (Open_node &open_node) {
|
||||
open_node.node().truncate(size);
|
||||
};
|
||||
|
||||
using namespace Ffat;
|
||||
|
||||
/* 'f_truncate()' truncates to the current seek pointer */
|
||||
|
||||
FRESULT res = f_lseek(file->ffat_fil(), size);
|
||||
|
||||
switch(res) {
|
||||
case FR_OK:
|
||||
/* according to the FatFs documentation this can happen */
|
||||
if (f_tell(file->ffat_fil()) != size) {
|
||||
error("f_lseek() could not seek to offset ", size);
|
||||
return;
|
||||
}
|
||||
break;
|
||||
case FR_DISK_ERR:
|
||||
error("f_lseek() failed with error code FR_DISK_ERR");
|
||||
return;
|
||||
case FR_INT_ERR:
|
||||
error("f_lseek() failed with error code FR_INT_ERR");
|
||||
return;
|
||||
case FR_NOT_READY:
|
||||
error("f_lseek() failed with error code FR_NOT_READY");
|
||||
return;
|
||||
case FR_INVALID_OBJECT:
|
||||
error("f_lseek() failed with error code FR_INVALID_OBJECT");
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(file_handle, truncate_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
default:
|
||||
/* not supposed to occur according to the libffat documentation */
|
||||
error("f_lseek() returned an unexpected error code");
|
||||
return;
|
||||
}
|
||||
|
||||
res = f_truncate(file->ffat_fil());
|
||||
|
||||
switch(res) {
|
||||
case FR_OK:
|
||||
return;
|
||||
case FR_INVALID_OBJECT:
|
||||
error("f_truncate() failed with error code FR_INVALID_OBJECT");
|
||||
throw Invalid_handle();
|
||||
case FR_DISK_ERR:
|
||||
error("f_truncate() failed with error code FR_DISK_ERR");
|
||||
return;
|
||||
case FR_INT_ERR:
|
||||
error("f_truncate() failed with error code FR_INT_ERR");
|
||||
return;
|
||||
case FR_NOT_READY:
|
||||
error("f_truncate() failed with error code FR_NOT_READY");
|
||||
return;
|
||||
case FR_TIMEOUT:
|
||||
error("f_truncate() failed with error code FR_TIMEOUT");
|
||||
return;
|
||||
default:
|
||||
/* not supposed to occur according to the libffat documentation */
|
||||
error("f_truncate() returned an unexpected error code");
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
void move(Dir_handle from_dir_handle, Name const &from_name,
|
||||
Dir_handle to_dir_handle, Name const &to_name)
|
||||
{
|
||||
Ffat_lock_guard ffat_lock_guard(_ffat_lock);
|
||||
|
||||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
|
@ -763,14 +713,18 @@ namespace File_system {
|
|||
if (!valid_filename(to_name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
auto move_fn = [&] (Open_node &open_from_dir_node) {
|
||||
|
||||
auto inner_move_fn = [&] (Open_node &open_to_dir_node) {
|
||||
|
||||
Absolute_path absolute_from_path(_root.name());
|
||||
Absolute_path absolute_to_path(_root.name());
|
||||
|
||||
try {
|
||||
absolute_from_path.append(_handle_registry.lookup(from_dir_handle)->name());
|
||||
absolute_from_path.append(open_from_dir_node.node().name());
|
||||
absolute_from_path.append("/");
|
||||
absolute_from_path.append(from_name.string());
|
||||
absolute_to_path.append(_handle_registry.lookup(to_dir_handle)->name());
|
||||
absolute_to_path.append(open_to_dir_node.node().name());
|
||||
absolute_to_path.append("/");
|
||||
absolute_to_path.append(to_name.string());
|
||||
} catch (Path_base::Path_too_long) {
|
||||
|
@ -816,6 +770,20 @@ namespace File_system {
|
|||
error("f_rename() returned an unexpected error code");
|
||||
throw Lookup_failed();
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(to_dir_handle, inner_move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(from_dir_handle, move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void sigh(Node_handle, Genode::Signal_context_capability)
|
||||
|
@ -825,7 +793,7 @@ namespace File_system {
|
|||
};
|
||||
|
||||
|
||||
class Root : public Root_component<Session_component>
|
||||
class Ffat_fs::Root : public Root_component<Session_component>
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -970,17 +938,16 @@ namespace File_system {
|
|||
_env(env), _md_alloc(md_alloc), _heap(heap), _root_dir(root)
|
||||
{ }
|
||||
};
|
||||
};
|
||||
|
||||
|
||||
struct Main
|
||||
struct Ffat_fs::Main
|
||||
{
|
||||
Genode::Env &_env;
|
||||
Genode::Heap _heap { _env.ram(), _env.rm() };
|
||||
Genode::Sliced_heap _sliced_heap { _env.ram(), _env.rm() };
|
||||
|
||||
File_system::Directory _root_dir { "/" };
|
||||
File_system::Root _root { _env, _sliced_heap, _heap, _root_dir };
|
||||
Directory _root_dir { "/" };
|
||||
Root _root { _env, _sliced_heap, _heap, _root_dir };
|
||||
|
||||
Ffat::FATFS _fatfs;
|
||||
|
||||
|
@ -1011,5 +978,5 @@ void Component::construct(Genode::Env &env)
|
|||
/* XXX execute constructors of global statics */
|
||||
env.exec_static_constructors();
|
||||
|
||||
static Main main(env);
|
||||
static Ffat_fs::Main main(env);
|
||||
}
|
||||
|
|
|
@ -4,6 +4,13 @@
|
|||
* \date 2012-07-04
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _NODE_H_
|
||||
#define _NODE_H_
|
||||
|
||||
|
@ -17,11 +24,16 @@ namespace Ffat { extern "C" {
|
|||
#include <ffat/ff.h>
|
||||
} }
|
||||
|
||||
namespace File_system {
|
||||
namespace Ffat_fs {
|
||||
using namespace File_system;
|
||||
|
||||
typedef Genode::Path<_MAX_LFN + 1> Absolute_path;
|
||||
|
||||
class Node : public Node_base
|
||||
class Node;
|
||||
}
|
||||
|
||||
|
||||
class Ffat_fs::Node : public Node_base
|
||||
{
|
||||
protected:
|
||||
|
||||
|
@ -50,8 +62,14 @@ namespace File_system {
|
|||
Genode::error("write() called on generic Node object");
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* File functionality
|
||||
*/
|
||||
virtual void truncate(file_size_t size)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-file node");
|
||||
}
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif /* _NODE_H_ */
|
||||
|
|
|
@ -6,6 +6,13 @@
|
|||
* \date 2013-11-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _DIRECTORY_H_
|
||||
#define _DIRECTORY_H_
|
||||
|
||||
|
@ -30,12 +37,12 @@
|
|||
#include <fuse_private.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Fuse_fs {
|
||||
class Directory;
|
||||
}
|
||||
|
||||
|
||||
class File_system::Directory : public Node
|
||||
class Fuse_fs::Directory : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -181,13 +188,12 @@ class File_system::Directory : public Node
|
|||
else
|
||||
throw Lookup_failed();
|
||||
|
||||
node->lock();
|
||||
return node;
|
||||
}
|
||||
|
||||
struct fuse_file_info *file_info() { return &_file_info; }
|
||||
|
||||
Status status()
|
||||
Status status() override
|
||||
{
|
||||
struct stat s;
|
||||
int res = Fuse::fuse()->op.getattr(_path.base(), &s);
|
||||
|
@ -202,7 +208,7 @@ class File_system::Directory : public Node
|
|||
return status;
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
if (len < sizeof(Directory_entry)) {
|
||||
Genode::error("read buffer too small for directory entry");
|
||||
|
@ -277,7 +283,7 @@ class File_system::Directory : public Node
|
|||
return sizeof(Directory_entry);
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* writing to directory nodes is not supported */
|
||||
return 0;
|
||||
|
|
|
@ -6,6 +6,13 @@
|
|||
* \date 2013-11-26
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _FILE_H_
|
||||
#define _FILE_H_
|
||||
|
||||
|
@ -16,12 +23,12 @@
|
|||
#include <fuse.h>
|
||||
#include <fuse_private.h>
|
||||
|
||||
namespace File_system {
|
||||
namespace Fuse_fs {
|
||||
class File;
|
||||
}
|
||||
|
||||
|
||||
class File_system::File : public Node
|
||||
class Fuse_fs::File : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -104,7 +111,7 @@ class File_system::File : public Node
|
|||
|
||||
struct fuse_file_info *file_info() { return &_file_info; }
|
||||
|
||||
Status status()
|
||||
Status status() override
|
||||
{
|
||||
struct stat s;
|
||||
int res = Fuse::fuse()->op.getattr(_path.base(), &s);
|
||||
|
@ -118,7 +125,7 @@ class File_system::File : public Node
|
|||
return status;
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* append mode, use actual length as offset */
|
||||
if (seek_offset == ~0ULL)
|
||||
|
@ -129,7 +136,7 @@ class File_system::File : public Node
|
|||
return ret < 0 ? 0 : ret;
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* append mode, use actual length as offset */
|
||||
if (seek_offset == ~0ULL)
|
||||
|
@ -140,7 +147,7 @@ class File_system::File : public Node
|
|||
return ret < 0 ? 0 : ret;
|
||||
}
|
||||
|
||||
void truncate(file_size_t size)
|
||||
void truncate(file_size_t size) override
|
||||
{
|
||||
int res = Fuse::fuse()->op.ftruncate(_path.base(), size,
|
||||
&_file_info);
|
||||
|
|
|
@ -13,7 +13,7 @@
|
|||
|
||||
/* Genode includes */
|
||||
#include <base/heap.h>
|
||||
#include <file_system/node_handle_registry.h>
|
||||
#include <file_system/open_node.h>
|
||||
#include <file_system_session/rpc_object.h>
|
||||
#include <base/attached_rom_dataspace.h>
|
||||
#include <os/session_policy.h>
|
||||
|
@ -29,21 +29,28 @@
|
|||
#include <util.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Fuse_fs {
|
||||
|
||||
using namespace Genode;
|
||||
using File_system::Packet_descriptor;
|
||||
using File_system::Path;
|
||||
|
||||
struct Main;
|
||||
struct Session_component;
|
||||
struct Root;
|
||||
}
|
||||
|
||||
|
||||
class File_system::Session_component : public Session_rpc_object
|
||||
class Fuse_fs::Session_component : public Session_rpc_object
|
||||
{
|
||||
private:
|
||||
|
||||
typedef File_system::Open_node<Node> Open_node;
|
||||
|
||||
Genode::Env &_env;
|
||||
Allocator &_md_alloc;
|
||||
Directory &_root;
|
||||
Node_handle_registry _handle_registry;
|
||||
Id_space<File_system::Node> _open_node_registry;
|
||||
bool _writeable;
|
||||
|
||||
Signal_handler<Session_component> _process_packet_handler;
|
||||
|
@ -58,7 +65,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
*
|
||||
* \return true on success, false on failure
|
||||
*/
|
||||
void _process_packet_op(Packet_descriptor &packet, Node &node)
|
||||
void _process_packet_op(Packet_descriptor &packet, Open_node &open_node)
|
||||
{
|
||||
void * const content = tx_sink()->packet_content(packet);
|
||||
size_t const length = packet.length();
|
||||
|
@ -70,18 +77,18 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
case Packet_descriptor::READ:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.read((char *)content, length, packet.position());
|
||||
res_length = open_node.node().read((char *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::WRITE:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.write((char const *)content, length, packet.position());
|
||||
res_length = open_node.node().write((char const *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::CONTENT_CHANGED:
|
||||
_handle_registry.register_notify(*tx_sink(), packet.handle());
|
||||
open_node.register_notify(*tx_sink());
|
||||
/* notify_listeners may bounce the packet back*/
|
||||
node.notify_listeners();
|
||||
open_node.node().notify_listeners();
|
||||
/* otherwise defer acknowledgement of this packet */
|
||||
return;
|
||||
|
||||
|
@ -102,13 +109,16 @@ class File_system::Session_component : public Session_rpc_object
|
|||
/* assume failure by default */
|
||||
packet.succeeded(false);
|
||||
|
||||
try {
|
||||
Node *node = _handle_registry.lookup_and_lock(packet.handle());
|
||||
Node_lock_guard guard(node);
|
||||
auto process_packet_fn = [&] (Open_node &open_node) {
|
||||
_process_packet_op(packet, open_node);
|
||||
};
|
||||
|
||||
_process_packet_op(packet, *node);
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(packet.handle(), process_packet_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
Genode::error("Invalid_handle");
|
||||
tx_sink()->acknowledge_packet(packet);
|
||||
}
|
||||
catch (Invalid_handle) { Genode::error("Invalid_handle"); }
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -193,38 +203,60 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_filename(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup_and_lock(dir_handle);
|
||||
Node_lock_guard dir_guard(dir);
|
||||
auto file_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (create && !_writeable)
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = new (&_md_alloc) File(dir, name.string(), mode, create);
|
||||
Node_lock_guard file_guard(file);
|
||||
File *file = new (&_md_alloc) File(&dir, name.string(), mode, create);
|
||||
|
||||
return _handle_registry.alloc(file);
|
||||
Open_node *open_file =
|
||||
new (_md_alloc) Open_node(*file, _open_node_registry);
|
||||
|
||||
return open_file->id();
|
||||
};
|
||||
|
||||
try {
|
||||
return File_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, file_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Symlink_handle symlink(Dir_handle dir_handle, Name const &name, bool create)
|
||||
{
|
||||
if (! Fuse::support_symlinks()) {
|
||||
Genode::error("FUSE file system does not support symlinks");
|
||||
return Symlink_handle();
|
||||
throw Permission_denied();
|
||||
}
|
||||
|
||||
if (!valid_filename(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup_and_lock(dir_handle);
|
||||
Node_lock_guard dir_guard(dir);
|
||||
auto symlink_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (create && !_writeable)
|
||||
throw Permission_denied();
|
||||
|
||||
Symlink *symlink = new (&_md_alloc) Symlink(dir, name.string(), create);
|
||||
Node_lock_guard symlink_guard(symlink);
|
||||
Symlink *symlink = new (&_md_alloc) Symlink(&dir, name.string(), create);
|
||||
|
||||
return _handle_registry.alloc(symlink);
|
||||
Open_node *open_symlink =
|
||||
new (_md_alloc) Open_node(*symlink, _open_node_registry);
|
||||
|
||||
return Symlink_handle { open_symlink->id().value };
|
||||
};
|
||||
|
||||
try {
|
||||
return _open_node_registry.apply<Open_node>(dir_handle, symlink_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Dir_handle dir(Path const &path, bool create)
|
||||
|
@ -241,8 +273,10 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
Directory *dir_node = new (&_md_alloc) Directory(_md_alloc, path_str, create);
|
||||
|
||||
Node_lock_guard guard(dir_node);
|
||||
return _handle_registry.alloc(dir_node);
|
||||
Open_node *open_dir =
|
||||
new (_md_alloc) Open_node(*dir_node, _open_node_registry);
|
||||
|
||||
return Dir_handle { open_dir->id().value };
|
||||
}
|
||||
|
||||
Node_handle node(Path const &path)
|
||||
|
@ -257,48 +291,38 @@ class File_system::Session_component : public Session_rpc_object
|
|||
*/
|
||||
Node *node = _root.node(path_str + 1);
|
||||
|
||||
Node_lock_guard guard(node);
|
||||
return _handle_registry.alloc(node);
|
||||
Open_node *open_node =
|
||||
new (_md_alloc) Open_node(*node, _open_node_registry);
|
||||
|
||||
return open_node->id();
|
||||
}
|
||||
|
||||
void close(Node_handle handle)
|
||||
{
|
||||
Node *node;
|
||||
auto close_fn = [&] (Open_node &open_node) {
|
||||
Node &node = open_node.node();
|
||||
destroy(_md_alloc, &open_node);
|
||||
destroy(_md_alloc, &node);
|
||||
};
|
||||
|
||||
try {
|
||||
node = _handle_registry.lookup_and_lock(handle);
|
||||
/**
|
||||
* We need to call unlock() here because the handle registry
|
||||
* calls lock() itself on the node.
|
||||
*/
|
||||
node->unlock();
|
||||
} catch (Invalid_handle) {
|
||||
Genode::error("close() called with invalid handle");
|
||||
return;
|
||||
_open_node_registry.apply<Open_node>(handle, close_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
|
||||
_handle_registry.free(handle);
|
||||
destroy(&_md_alloc, node);
|
||||
}
|
||||
|
||||
Status status(Node_handle node_handle)
|
||||
{
|
||||
Node *node = _handle_registry.lookup_and_lock(node_handle);
|
||||
Node_lock_guard guard(node);
|
||||
auto status_fn = [&] (Open_node &open_node) {
|
||||
return open_node.node().status();
|
||||
};
|
||||
|
||||
File *file = dynamic_cast<File *>(node);
|
||||
if (file)
|
||||
return file->status();
|
||||
|
||||
Directory *dir = dynamic_cast<Directory *>(node);
|
||||
if (dir)
|
||||
return dir->status();
|
||||
|
||||
Symlink *symlink = dynamic_cast<Symlink *>(node);
|
||||
if (symlink)
|
||||
return symlink->status();
|
||||
|
||||
return Status();
|
||||
try {
|
||||
return _open_node_registry.apply<Open_node>(node_handle, status_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void control(Node_handle, Control)
|
||||
|
@ -311,13 +335,14 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writeable)
|
||||
throw Permission_denied();
|
||||
|
||||
Directory *dir = _handle_registry.lookup_and_lock(dir_handle);
|
||||
Node_lock_guard dir_guard(dir);
|
||||
auto unlink_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
Absolute_path absolute_path(_root.name());
|
||||
|
||||
try {
|
||||
absolute_path.append(dir->name());
|
||||
absolute_path.append(dir.name());
|
||||
absolute_path.append("/");
|
||||
absolute_path.append(name.string());
|
||||
} catch (Path_base::Path_too_long) {
|
||||
|
@ -331,6 +356,13 @@ class File_system::Session_component : public Session_rpc_object
|
|||
Genode::error("fuse()->op.unlink() returned unexpected error code: ", res);
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, unlink_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void truncate(File_handle file_handle, file_size_t size)
|
||||
|
@ -338,12 +370,15 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writeable)
|
||||
throw Permission_denied();
|
||||
|
||||
File *file;
|
||||
try { file = _handle_registry.lookup_and_lock(file_handle); }
|
||||
catch (Invalid_handle) { throw Lookup_failed(); }
|
||||
auto truncate_fn = [&] (Open_node &open_node) {
|
||||
open_node.node().truncate(size);
|
||||
};
|
||||
|
||||
Node_lock_guard file_guard(file);
|
||||
file->truncate(size);
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(file_handle, truncate_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void move(Dir_handle from_dir_handle, Name const &from_name,
|
||||
|
@ -352,27 +387,21 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writeable)
|
||||
throw Permission_denied();
|
||||
|
||||
Directory *from_dir, *to_dir;
|
||||
try { from_dir = _handle_registry.lookup_and_lock(from_dir_handle); }
|
||||
catch (Invalid_handle) { throw Lookup_failed(); }
|
||||
auto move_fn = [&] (Open_node &open_from_dir_node) {
|
||||
|
||||
try { to_dir = _handle_registry.lookup_and_lock(to_dir_handle); }
|
||||
catch (Invalid_handle) {
|
||||
from_dir->unlock();
|
||||
throw Lookup_failed();
|
||||
}
|
||||
auto inner_move_fn = [&] (Open_node &open_to_dir_node) {
|
||||
|
||||
Node_lock_guard from_dir_guard(from_dir);
|
||||
Node_lock_guard to_dir_guard(to_dir);
|
||||
Node &from_dir = open_from_dir_node.node();
|
||||
Node &to_dir = open_to_dir_node.node();
|
||||
|
||||
Absolute_path absolute_from_path(_root.name());
|
||||
Absolute_path absolute_to_path(_root.name());
|
||||
|
||||
try {
|
||||
absolute_from_path.append(from_dir->name());
|
||||
absolute_from_path.append(from_dir.name());
|
||||
absolute_from_path.append("/");
|
||||
absolute_from_path.append(from_name.string());
|
||||
absolute_to_path.append(to_dir->name());
|
||||
absolute_to_path.append(to_dir.name());
|
||||
absolute_to_path.append("/");
|
||||
absolute_to_path.append(to_name.string());
|
||||
} catch (Path_base::Path_too_long) {
|
||||
|
@ -387,6 +416,20 @@ class File_system::Session_component : public Session_rpc_object
|
|||
Genode::error("fuse()->op.rename() returned unexpected error code: ", res);
|
||||
return;
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(to_dir_handle, inner_move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(from_dir_handle, move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void sync(Node_handle) override
|
||||
|
@ -396,7 +439,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
};
|
||||
|
||||
|
||||
class File_system::Root : public Root_component<Session_component>
|
||||
class Fuse_fs::Root : public Root_component<Session_component>
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -500,7 +543,7 @@ class File_system::Root : public Root_component<Session_component>
|
|||
};
|
||||
|
||||
|
||||
struct File_system::Main
|
||||
struct Fuse_fs::Main
|
||||
{
|
||||
Genode::Env & env;
|
||||
Sliced_heap sliced_heap { env.ram(), env.rm() };
|
||||
|
@ -531,6 +574,6 @@ struct File_system::Main
|
|||
|
||||
void Libc::Component::construct(Libc::Env &env)
|
||||
{
|
||||
static File_system::Main inst(env);
|
||||
static Fuse_fs::Main inst(env);
|
||||
}
|
||||
|
||||
|
|
|
@ -6,24 +6,34 @@
|
|||
* \date 2013-11-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _NODE_H_
|
||||
#define _NODE_H_
|
||||
|
||||
/* Genode includes */
|
||||
#include <file_system/node.h>
|
||||
#include <util/list.h>
|
||||
#include <base/lock.h>
|
||||
#include <base/signal.h>
|
||||
#include <os/path.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Fuse_fs {
|
||||
|
||||
using namespace Genode;
|
||||
using namespace File_system;
|
||||
|
||||
typedef Genode::Path<MAX_PATH_LEN> Absolute_path;
|
||||
|
||||
class Node : public Node_base, public List<Node>::Element
|
||||
class Node;
|
||||
}
|
||||
|
||||
class Fuse_fs::Node : public Node_base
|
||||
{
|
||||
protected:
|
||||
|
||||
|
@ -38,8 +48,15 @@ namespace File_system {
|
|||
|
||||
virtual size_t read(char *dst, size_t len, seek_off_t) = 0;
|
||||
virtual size_t write(char const *src, size_t len, seek_off_t) = 0;
|
||||
virtual Status status() = 0;
|
||||
|
||||
/*
|
||||
* File functionality
|
||||
*/
|
||||
virtual void truncate(file_size_t size)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-file node");
|
||||
}
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif /* _NODE_H_ */
|
||||
|
|
|
@ -6,6 +6,13 @@
|
|||
* \date 2013-11-26
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _SYMLINK_H_
|
||||
#define _SYMLINK_H_
|
||||
|
||||
|
@ -13,12 +20,12 @@
|
|||
#include <node.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Fuse_fs {
|
||||
class Symlink;
|
||||
}
|
||||
|
||||
|
||||
class File_system::Symlink : public Node
|
||||
class Fuse_fs::Symlink : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -45,7 +52,7 @@ class File_system::Symlink : public Node
|
|||
_path(name, parent->name())
|
||||
{ }
|
||||
|
||||
Status status()
|
||||
Status status() override
|
||||
{
|
||||
struct stat s;
|
||||
int res = Fuse::fuse()->op.getattr(_path.base(), &s);
|
||||
|
@ -59,7 +66,7 @@ class File_system::Symlink : public Node
|
|||
return status;
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
int res = Fuse::fuse()->op.readlink(_path.base(), dst, len);
|
||||
if (res != 0)
|
||||
|
@ -68,7 +75,7 @@ class File_system::Symlink : public Node
|
|||
return Genode::strlen(dst);
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* Ideal symlink operations are atomic. */
|
||||
if (seek_offset) return 0;
|
||||
|
|
|
@ -4,6 +4,13 @@
|
|||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _FILE_SYSTEM__LISTENER_H_
|
||||
#define _FILE_SYSTEM__LISTENER_H_
|
||||
|
||||
|
@ -23,23 +30,21 @@ namespace File_system {
|
|||
private:
|
||||
|
||||
Genode::Lock _lock;
|
||||
Sink *_sink = nullptr;
|
||||
Sink &_sink;
|
||||
Node_handle _handle;
|
||||
bool _marked_as_updated;
|
||||
|
||||
public:
|
||||
|
||||
Listener() : _marked_as_updated(false) { }
|
||||
|
||||
Listener(Sink &sink, Node_handle handle)
|
||||
: _sink(&sink), _handle(handle), _marked_as_updated(false) { }
|
||||
: _sink(sink), _handle(handle), _marked_as_updated(false) { }
|
||||
|
||||
void notify()
|
||||
{
|
||||
Genode::Lock::Guard guard(_lock);
|
||||
|
||||
if (_marked_as_updated && _sink && _sink->ready_to_ack()) {
|
||||
_sink->acknowledge_packet(Packet_descriptor(
|
||||
if (_marked_as_updated && _sink.ready_to_ack()) {
|
||||
_sink.acknowledge_packet(Packet_descriptor(
|
||||
_handle, Packet_descriptor::CONTENT_CHANGED));
|
||||
_marked_as_updated = false;
|
||||
}
|
||||
|
@ -51,8 +56,6 @@ namespace File_system {
|
|||
|
||||
_marked_as_updated = true;
|
||||
}
|
||||
|
||||
bool valid() const { return _sink != nullptr; }
|
||||
};
|
||||
|
||||
}
|
||||
|
|
|
@ -4,6 +4,13 @@
|
|||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _FILE_SYSTEM__NODE_H_
|
||||
#define _FILE_SYSTEM__NODE_H_
|
||||
|
||||
|
@ -19,7 +26,6 @@ namespace File_system {
|
|||
{
|
||||
private:
|
||||
|
||||
Genode::Lock _lock;
|
||||
Genode::List<Listener> _listeners;
|
||||
|
||||
public:
|
||||
|
@ -34,9 +40,6 @@ namespace File_system {
|
|||
_listeners.remove(_listeners.first());
|
||||
}
|
||||
|
||||
void lock() { _lock.lock(); }
|
||||
void unlock() { _lock.unlock(); }
|
||||
|
||||
void add_listener(Listener *listener)
|
||||
{
|
||||
_listeners.insert(listener);
|
||||
|
@ -59,19 +62,6 @@ namespace File_system {
|
|||
curr->mark_as_updated();
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
/**
|
||||
* Guard used for properly releasing node locks
|
||||
*/
|
||||
struct Node_lock_guard
|
||||
{
|
||||
Node_base *node;
|
||||
|
||||
Node_lock_guard(Node_base *node) : node(node) { node = node; }
|
||||
|
||||
~Node_lock_guard() { node->unlock(); }
|
||||
};
|
||||
}
|
||||
|
||||
#endif /* _FILE_SYSTEM__NODE_H_ */
|
||||
|
|
|
@ -1,218 +0,0 @@
|
|||
/*
|
||||
* \brief Facility for managing the session-local node-handle namespace
|
||||
* \author Norman Feske
|
||||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
#ifndef _FILE_SYSTEM__NODE_HANDLE_REGISTRY_H_
|
||||
#define _FILE_SYSTEM__NODE_HANDLE_REGISTRY_H_
|
||||
|
||||
#include <file_system/node.h>
|
||||
|
||||
namespace File_system {
|
||||
|
||||
class Node;
|
||||
class Directory;
|
||||
class File;
|
||||
class Symlink;
|
||||
|
||||
/**
|
||||
* Type trait for determining the node type for a given handle type
|
||||
*/
|
||||
template<typename T> struct Node_type;
|
||||
template<> struct Node_type<Node_handle> { typedef Node Type; };
|
||||
template<> struct Node_type<Dir_handle> { typedef Directory Type; };
|
||||
template<> struct Node_type<File_handle> { typedef File Type; };
|
||||
template<> struct Node_type<Symlink_handle> { typedef Symlink Type; };
|
||||
|
||||
|
||||
/**
|
||||
* Type trait for determining the handle type for a given node type
|
||||
*/
|
||||
template<typename T> struct Handle_type;
|
||||
template<> struct Handle_type<Node> { typedef Node_handle Type; };
|
||||
template<> struct Handle_type<Directory> { typedef Dir_handle Type; };
|
||||
template<> struct Handle_type<File> { typedef File_handle Type; };
|
||||
template<> struct Handle_type<Symlink> { typedef Symlink_handle Type; };
|
||||
|
||||
|
||||
class Node_handle_registry
|
||||
{
|
||||
public:
|
||||
|
||||
class Out_of_node_handles : public Exception { };
|
||||
|
||||
private:
|
||||
|
||||
/* maximum number of open nodes per session */
|
||||
enum { MAX_NODE_HANDLES = 128U };
|
||||
|
||||
Genode::Lock mutable _lock;
|
||||
|
||||
Node_base *_nodes[MAX_NODE_HANDLES];
|
||||
|
||||
/**
|
||||
* Each open node handle can act as a listener to be informed about
|
||||
* node changes.
|
||||
*/
|
||||
Listener _listeners[MAX_NODE_HANDLES];
|
||||
|
||||
/**
|
||||
* Allocate node handle
|
||||
*
|
||||
* \throw Out_of_node_handles
|
||||
*/
|
||||
int _alloc(Node_base *node)
|
||||
{
|
||||
Genode::Lock::Guard guard(_lock);
|
||||
|
||||
for (unsigned i = 0; i < MAX_NODE_HANDLES; i++)
|
||||
if (!_nodes[i]) {
|
||||
_nodes[i] = node;
|
||||
return i;
|
||||
}
|
||||
|
||||
throw Out_of_node_handles();
|
||||
}
|
||||
|
||||
bool _in_range(int handle) const
|
||||
{
|
||||
return ((handle >= 0) && (handle < MAX_NODE_HANDLES));
|
||||
}
|
||||
|
||||
public:
|
||||
|
||||
Node_handle_registry()
|
||||
{
|
||||
for (unsigned i = 0; i < MAX_NODE_HANDLES; i++)
|
||||
_nodes[i] = 0;
|
||||
}
|
||||
|
||||
template <typename NODE_TYPE>
|
||||
typename Handle_type<NODE_TYPE>::Type alloc(NODE_TYPE *node)
|
||||
{
|
||||
typedef typename Handle_type<NODE_TYPE>::Type Handle;
|
||||
return Handle(_alloc(node));
|
||||
}
|
||||
|
||||
/**
|
||||
* Release node handle
|
||||
*/
|
||||
void free(Node_handle handle)
|
||||
{
|
||||
Genode::Lock::Guard guard(_lock);
|
||||
|
||||
if (!_in_range(handle.value))
|
||||
return;
|
||||
|
||||
/*
|
||||
* Notify listeners about the changed file.
|
||||
*/
|
||||
Node_base *node = dynamic_cast<Node_base *>(_nodes[handle.value]);
|
||||
if (!node) { return; }
|
||||
|
||||
node->lock();
|
||||
node->notify_listeners();
|
||||
|
||||
/*
|
||||
* De-allocate handle
|
||||
*/
|
||||
Listener &listener = _listeners[handle.value];
|
||||
|
||||
if (listener.valid())
|
||||
node->remove_listener(&listener);
|
||||
|
||||
_nodes[handle.value] = 0;
|
||||
listener = Listener();
|
||||
|
||||
node->unlock();
|
||||
}
|
||||
|
||||
/**
|
||||
* Lookup node using its handle as key
|
||||
*
|
||||
* \throw Invalid_handle
|
||||
*/
|
||||
template <typename HANDLE_TYPE>
|
||||
typename Node_type<HANDLE_TYPE>::Type *lookup(HANDLE_TYPE handle)
|
||||
{
|
||||
Genode::Lock::Guard guard(_lock);
|
||||
|
||||
if (!_in_range(handle.value))
|
||||
throw Invalid_handle();
|
||||
|
||||
typedef typename Node_type<HANDLE_TYPE>::Type Node;
|
||||
Node *node = dynamic_cast<Node *>(_nodes[handle.value]);
|
||||
if (!node)
|
||||
throw Invalid_handle();
|
||||
|
||||
return node;
|
||||
}
|
||||
|
||||
/**
|
||||
* Lookup node using its handle as key
|
||||
*
|
||||
* The node returned by this function is in a locked state.
|
||||
*
|
||||
* \throw Invalid_handle
|
||||
*/
|
||||
template <typename HANDLE_TYPE>
|
||||
typename Node_type<HANDLE_TYPE>::Type *lookup_and_lock(HANDLE_TYPE handle)
|
||||
{
|
||||
Genode::Lock::Guard guard(_lock);
|
||||
|
||||
if (!_in_range(handle.value))
|
||||
throw Invalid_handle();
|
||||
|
||||
typedef typename Node_type<HANDLE_TYPE>::Type Node_base;
|
||||
Node_base *node = dynamic_cast<Node_base *>(_nodes[handle.value]);
|
||||
if (!node)
|
||||
throw Invalid_handle();
|
||||
|
||||
node->lock();
|
||||
return node;
|
||||
}
|
||||
|
||||
bool refer_to_same_node(Node_handle h1, Node_handle h2) const
|
||||
{
|
||||
Genode::Lock::Guard guard(_lock);
|
||||
|
||||
if (!_in_range(h1.value) || !_in_range(h2.value))
|
||||
throw Invalid_handle();
|
||||
|
||||
return _nodes[h1.value] == _nodes[h2.value];
|
||||
}
|
||||
|
||||
/**
|
||||
* Register signal handler to be notified of node changes
|
||||
*/
|
||||
void register_notify(Sink &sink, Node_handle handle)
|
||||
{
|
||||
Genode::Lock::Guard guard(_lock);
|
||||
|
||||
if (!_in_range(handle.value))
|
||||
throw Invalid_handle();
|
||||
|
||||
Node_base *node = dynamic_cast<Node_base *>(_nodes[handle.value]);
|
||||
if (!node)
|
||||
throw Invalid_handle();
|
||||
|
||||
Listener &listener = _listeners[handle.value];
|
||||
|
||||
/*
|
||||
* If there was already a handler registered for the node,
|
||||
* remove the old handler.
|
||||
*/
|
||||
if (listener.valid())
|
||||
node->remove_listener(&listener);
|
||||
|
||||
/*
|
||||
* Register new handler
|
||||
*/
|
||||
listener = Listener(sink, handle);
|
||||
node->add_listener(&listener);
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#endif /* _FILE_SYSTEM__NODE_HANDLE_REGISTRY_H_ */
|
79
repos/os/include/file_system/open_node.h
Normal file
79
repos/os/include/file_system/open_node.h
Normal file
|
@ -0,0 +1,79 @@
|
|||
/*
|
||||
* \brief Representation of an open file system node within the component
|
||||
* \author Christian Prochaska
|
||||
* \date 2017-06-09
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _OPEN_NODE_H_
|
||||
#define _OPEN_NODE_H_
|
||||
|
||||
/* Genode includes */
|
||||
#include <file_system/listener.h>
|
||||
#include <file_system_session/file_system_session.h>
|
||||
|
||||
namespace File_system {
|
||||
/*
|
||||
* \param NODE component-specific node type
|
||||
*/
|
||||
template <typename NODE> class Open_node;
|
||||
}
|
||||
|
||||
template <typename NODE>
|
||||
class File_system::Open_node : public File_system::Node
|
||||
{
|
||||
private:
|
||||
|
||||
Genode::Id_space<File_system::Node>::Element _element;
|
||||
|
||||
NODE &_node;
|
||||
Genode::Constructible<File_system::Listener> _listener;
|
||||
|
||||
public:
|
||||
|
||||
Open_node(NODE &node, Genode::Id_space<File_system::Node> &id_space)
|
||||
: _element(*this, id_space),
|
||||
_node(node) { }
|
||||
|
||||
~Open_node()
|
||||
{
|
||||
if (_listener.constructed()) {
|
||||
_node.remove_listener(&*_listener);
|
||||
_listener.destruct();
|
||||
}
|
||||
}
|
||||
|
||||
NODE &node() { return _node; }
|
||||
File_system::Listener &listener() { return *_listener; }
|
||||
|
||||
Genode::Id_space<File_system::Node>::Id id() { return _element.id(); }
|
||||
|
||||
/**
|
||||
* Register packet stream sink to be notified of node changes
|
||||
*/
|
||||
void register_notify(File_system::Sink &sink)
|
||||
{
|
||||
/*
|
||||
* If there was already a handler registered for the node,
|
||||
* remove the old handler.
|
||||
*/
|
||||
if (_listener.constructed()) {
|
||||
_node.remove_listener(&*_listener);
|
||||
_listener.destruct();
|
||||
}
|
||||
|
||||
/*
|
||||
* Register new handler
|
||||
*/
|
||||
_listener.construct(sink, id());
|
||||
_node.add_listener(&*_listener);
|
||||
}
|
||||
};
|
||||
|
||||
#endif /* _OPEN_NODE_H_ */
|
|
@ -23,10 +23,39 @@
|
|||
|
||||
namespace File_system {
|
||||
|
||||
struct Node_handle;
|
||||
struct File_handle;
|
||||
struct Dir_handle;
|
||||
struct Symlink_handle;
|
||||
struct Node
|
||||
{
|
||||
typedef Genode::Id_space<Node>::Id Id;
|
||||
};
|
||||
|
||||
struct File : Node
|
||||
{
|
||||
struct Id : Node::Id
|
||||
{
|
||||
explicit Id(unsigned long value) : Node::Id { value } { };
|
||||
};
|
||||
};
|
||||
|
||||
struct Directory : Node
|
||||
{
|
||||
struct Id : Node::Id
|
||||
{
|
||||
explicit Id(unsigned long value) : Node::Id { value } { };
|
||||
};
|
||||
};
|
||||
|
||||
struct Symlink : Node
|
||||
{
|
||||
struct Id : Node::Id
|
||||
{
|
||||
explicit Id(unsigned long value) : Node::Id { value } { };
|
||||
};
|
||||
};
|
||||
|
||||
typedef Node::Id Node_handle;
|
||||
typedef File::Id File_handle;
|
||||
typedef Directory::Id Dir_handle;
|
||||
typedef Symlink::Id Symlink_handle;
|
||||
|
||||
using Genode::size_t;
|
||||
|
||||
|
@ -81,42 +110,6 @@ namespace File_system {
|
|||
}
|
||||
|
||||
|
||||
struct File_system::Node_handle
|
||||
{
|
||||
unsigned long value;
|
||||
|
||||
Node_handle() : value(~0UL) { }
|
||||
Node_handle(int v) : value(v) { }
|
||||
|
||||
bool valid() const { return value != ~0UL; }
|
||||
|
||||
bool operator == (Node_handle const &other) const { return other.value == value; }
|
||||
bool operator != (Node_handle const &other) const { return other.value != value; }
|
||||
|
||||
};
|
||||
|
||||
|
||||
struct File_system::File_handle : Node_handle
|
||||
{
|
||||
File_handle() { }
|
||||
File_handle(unsigned long v) : Node_handle(v) { }
|
||||
};
|
||||
|
||||
|
||||
struct File_system::Dir_handle : Node_handle
|
||||
{
|
||||
Dir_handle() { }
|
||||
Dir_handle(unsigned long v) : Node_handle(v) { }
|
||||
};
|
||||
|
||||
|
||||
struct File_system::Symlink_handle : Node_handle
|
||||
{
|
||||
Symlink_handle() { }
|
||||
Symlink_handle(unsigned long v) : Node_handle(v) { }
|
||||
};
|
||||
|
||||
|
||||
class File_system::Packet_descriptor : public Genode::Packet_descriptor
|
||||
{
|
||||
public:
|
||||
|
@ -125,7 +118,7 @@ class File_system::Packet_descriptor : public Genode::Packet_descriptor
|
|||
|
||||
private:
|
||||
|
||||
Node_handle _handle; /* node handle */
|
||||
Node_handle _handle { 0 }; /* node handle */
|
||||
Opcode _op; /* requested operation */
|
||||
seek_off_t _position; /* file seek offset in bytes */
|
||||
size_t _length; /* transaction length in bytes */
|
||||
|
@ -139,7 +132,7 @@ class File_system::Packet_descriptor : public Genode::Packet_descriptor
|
|||
Packet_descriptor(Genode::off_t buf_offset = 0,
|
||||
Genode::size_t buf_size = 0)
|
||||
:
|
||||
Genode::Packet_descriptor(buf_offset, buf_size), _handle(-1),
|
||||
Genode::Packet_descriptor(buf_offset, buf_size),
|
||||
_op(READ), _position(0), _length(0), _success(false) { }
|
||||
|
||||
/**
|
||||
|
@ -330,16 +323,22 @@ struct File_system::Session : public Genode::Session
|
|||
|
||||
/**
|
||||
* Close file
|
||||
*
|
||||
* \throw Invalid_handle node handle is invalid
|
||||
*/
|
||||
virtual void close(Node_handle) = 0;
|
||||
|
||||
/**
|
||||
* Request information about an open file or directory
|
||||
*
|
||||
* \throw Invalid_handle node handle is invalid
|
||||
*/
|
||||
virtual Status status(Node_handle) = 0;
|
||||
|
||||
/**
|
||||
* Set information about an open file or directory
|
||||
*
|
||||
* \throw Invalid_handle node handle is invalid
|
||||
*/
|
||||
virtual void control(Node_handle, Control) = 0;
|
||||
|
||||
|
@ -380,6 +379,9 @@ struct File_system::Session : public Genode::Session
|
|||
*
|
||||
* This is only needed by file systems that maintain an internal
|
||||
* cache, which needs to be flushed on certain occasions.
|
||||
*
|
||||
* \throw Invalid_handle node handle is invalid
|
||||
*
|
||||
*/
|
||||
virtual void sync(Node_handle) { }
|
||||
|
||||
|
@ -409,9 +411,15 @@ struct File_system::Session : public Genode::Session
|
|||
GENODE_RPC_THROW(Rpc_node, Node_handle, node,
|
||||
GENODE_TYPE_LIST(Lookup_failed, Out_of_ram, Out_of_caps),
|
||||
Path const &);
|
||||
GENODE_RPC(Rpc_close, void, close, Node_handle);
|
||||
GENODE_RPC(Rpc_status, Status, status, Node_handle);
|
||||
GENODE_RPC(Rpc_control, void, control, Node_handle, Control);
|
||||
GENODE_RPC_THROW(Rpc_close, void, close,
|
||||
GENODE_TYPE_LIST(Invalid_handle),
|
||||
Node_handle);
|
||||
GENODE_RPC_THROW(Rpc_status, Status, status,
|
||||
GENODE_TYPE_LIST(Invalid_handle),
|
||||
Node_handle);
|
||||
GENODE_RPC_THROW(Rpc_control, void, control,
|
||||
GENODE_TYPE_LIST(Invalid_handle),
|
||||
Node_handle, Control);
|
||||
GENODE_RPC_THROW(Rpc_unlink, void, unlink,
|
||||
GENODE_TYPE_LIST(Invalid_handle, Invalid_name,
|
||||
Lookup_failed, Not_empty,
|
||||
|
@ -425,7 +433,9 @@ struct File_system::Session : public Genode::Session
|
|||
GENODE_TYPE_LIST(Invalid_handle, Invalid_name,
|
||||
Lookup_failed, Permission_denied),
|
||||
Dir_handle, Name const &, Dir_handle, Name const &);
|
||||
GENODE_RPC(Rpc_sync, void, sync, Node_handle);
|
||||
GENODE_RPC_THROW(Rpc_sync, void, sync,
|
||||
GENODE_TYPE_LIST(Invalid_handle),
|
||||
Node_handle);
|
||||
|
||||
GENODE_RPC_INTERFACE(Rpc_tx_cap, Rpc_file, Rpc_symlink, Rpc_dir, Rpc_node,
|
||||
Rpc_close, Rpc_status, Rpc_control, Rpc_unlink,
|
||||
|
|
|
@ -1,67 +0,0 @@
|
|||
/*
|
||||
* \brief File-system node
|
||||
* \author Norman Feske
|
||||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _INCLUDE__RAM_FS__NODE_H_
|
||||
#define _INCLUDE__RAM_FS__NODE_H_
|
||||
|
||||
/* Genode includes */
|
||||
#include <file_system/listener.h>
|
||||
#include <file_system/node.h>
|
||||
#include <util/list.h>
|
||||
|
||||
namespace File_system {
|
||||
using namespace Genode;
|
||||
class Node;
|
||||
}
|
||||
|
||||
|
||||
class File_system::Node : public Node_base, public List<Node>::Element
|
||||
{
|
||||
public:
|
||||
|
||||
typedef char Name[128];
|
||||
|
||||
private:
|
||||
|
||||
int _ref_count;
|
||||
Name _name;
|
||||
unsigned long const _inode;
|
||||
|
||||
/**
|
||||
* Generate unique inode number
|
||||
*/
|
||||
static unsigned long _unique_inode()
|
||||
{
|
||||
static unsigned long inode_count;
|
||||
return ++inode_count;
|
||||
}
|
||||
|
||||
public:
|
||||
|
||||
Node()
|
||||
: _ref_count(0), _inode(_unique_inode())
|
||||
{ _name[0] = 0; }
|
||||
|
||||
unsigned long inode() const { return _inode; }
|
||||
char const *name() const { return _name; }
|
||||
|
||||
/**
|
||||
* Assign name
|
||||
*/
|
||||
void name(char const *name) { strncpy(_name, name, sizeof(_name)); }
|
||||
|
||||
virtual size_t read(char *dst, size_t len, seek_off_t) = 0;
|
||||
virtual size_t write(char const *src, size_t len, seek_off_t) = 0;
|
||||
};
|
||||
|
||||
#endif /* _INCLUDE__RAM_FS__NODE_H_ */
|
|
@ -122,24 +122,24 @@ void Rom_to_file::Main::_handle_update()
|
|||
try {
|
||||
Dir_handle dir_handle = ensure_dir(_fs, dir_path);
|
||||
Handle_guard dir_guard(_fs, dir_handle);
|
||||
File_handle handle;
|
||||
Constructible<File_handle> handle;
|
||||
|
||||
try {
|
||||
handle = _fs.file(dir_handle, file_name, File_system::WRITE_ONLY, true);
|
||||
handle.construct(_fs.file(dir_handle, file_name, File_system::WRITE_ONLY, true));
|
||||
} catch (Node_already_exists) {
|
||||
handle = _fs.file(dir_handle, file_name, File_system::WRITE_ONLY, false);
|
||||
handle.construct(_fs.file(dir_handle, file_name, File_system::WRITE_ONLY, false));
|
||||
}
|
||||
|
||||
_fs.truncate(handle, 0);
|
||||
_fs.truncate(*handle, 0);
|
||||
|
||||
size_t len = max(strlen(_rom_ds->local_addr<char>()), _rom_ds->size());
|
||||
size_t written = write(_fs, handle, _rom_ds->local_addr<void>(), len, 0);
|
||||
size_t written = write(_fs, *handle, _rom_ds->local_addr<void>(), len, 0);
|
||||
|
||||
if (written < len) {
|
||||
warning(written, " of ", len, " bytes have been written");
|
||||
}
|
||||
|
||||
_fs.close(handle);
|
||||
_fs.close(*handle);
|
||||
|
||||
} catch (Permission_denied) {
|
||||
error(Cstring(dir_path), file_name, ": permission denied");
|
||||
|
|
|
@ -58,7 +58,6 @@ class Usb_filter::Device_registry
|
|||
|
||||
Genode::Allocator_avl _fs_packet_alloc { &_alloc };
|
||||
File_system::Connection _fs { _env, _fs_packet_alloc, "usb_drv.config" };
|
||||
File_system::File_handle _file;
|
||||
|
||||
struct Entry : public Genode::List<Entry>::Element
|
||||
{
|
||||
|
@ -154,16 +153,18 @@ class Usb_filter::Device_registry
|
|||
{
|
||||
using namespace Genode;
|
||||
|
||||
Constructible<File_system::File_handle> file;
|
||||
|
||||
try {
|
||||
File_system::Dir_handle root_dir = _fs.dir("/", false);
|
||||
_file = _fs.file(root_dir, config_file, File_system::READ_WRITE, false);
|
||||
file.construct(_fs.file(root_dir, config_file, File_system::READ_WRITE, false));
|
||||
} catch (...) {
|
||||
error("could not open '", config_file, "'");
|
||||
return;
|
||||
}
|
||||
|
||||
char old_file[1024];
|
||||
size_t n = File_system::read(_fs, _file, old_file,
|
||||
size_t n = File_system::read(_fs, *file, old_file,
|
||||
sizeof(old_file));
|
||||
if (n == 0) {
|
||||
error("could not read '", config_file, "'");
|
||||
|
@ -216,11 +217,11 @@ class Usb_filter::Device_registry
|
|||
if (verbose)
|
||||
log("new usb_drv configuration:\n", Cstring(new_file));
|
||||
|
||||
n = File_system::write(_fs, _file, new_file, xml.used());
|
||||
n = File_system::write(_fs, *file, new_file, xml.used());
|
||||
if (n == 0)
|
||||
error("could not write '", config_file, "'");
|
||||
|
||||
_fs.close(_file);
|
||||
_fs.close(*file);
|
||||
}
|
||||
|
||||
Genode::Signal_handler<Device_registry> _devices_handler =
|
||||
|
|
|
@ -51,16 +51,7 @@ class Vfs::Fs_file_system : public File_system
|
|||
|
||||
::File_system::Connection _fs;
|
||||
|
||||
struct Fs_vfs_handle;
|
||||
|
||||
struct Handle_space : Genode::Id_space<Fs_vfs_handle>
|
||||
{
|
||||
struct Id : Genode::Id_space<Fs_vfs_handle>::Id
|
||||
{
|
||||
Id(unsigned long v) { value = v; }
|
||||
Id(::File_system::Node_handle h) { value = h.value; }
|
||||
};
|
||||
};
|
||||
typedef Genode::Id_space<::File_system::Node> Handle_space;
|
||||
|
||||
Handle_space _handle_space;
|
||||
|
||||
|
@ -77,19 +68,17 @@ class Vfs::Fs_file_system : public File_system
|
|||
::File_system::Packet_descriptor queued_write_packet;
|
||||
};
|
||||
|
||||
struct Fs_vfs_handle : Vfs_handle, Handle_space::Element, Handle_state
|
||||
struct Fs_vfs_handle : Vfs_handle, ::File_system::Node, Handle_space::Element, Handle_state
|
||||
{
|
||||
Handle_space::Id const id;
|
||||
|
||||
Fs_vfs_handle(File_system &fs, Allocator &alloc, int status_flags,
|
||||
Handle_space &space, Handle_space::Id id)
|
||||
:
|
||||
Vfs_handle(fs, fs, alloc, status_flags),
|
||||
Handle_space::Element(*this, space, id),
|
||||
id(id)
|
||||
Handle_space::Element(*this, space, id)
|
||||
{ }
|
||||
|
||||
::File_system::File_handle file_handle() const { return id.value; }
|
||||
::File_system::File_handle file_handle() const
|
||||
{ return ::File_system::File_handle { id().value }; }
|
||||
};
|
||||
|
||||
/**
|
||||
|
@ -400,13 +389,13 @@ class Vfs::Fs_file_system : public File_system
|
|||
if (strcmp(path, "") == 0)
|
||||
path = "/";
|
||||
|
||||
::File_system::Dir_handle dir_handle;
|
||||
try { dir_handle = _fs.dir(path, false); }
|
||||
Genode::Constructible<::File_system::Dir_handle> dir_handle;
|
||||
try { dir_handle.construct(_fs.dir(path, false)); }
|
||||
catch (::File_system::Lookup_failed) { return DIRENT_ERR_INVALID_PATH; }
|
||||
catch (::File_system::Name_too_long) { return DIRENT_ERR_INVALID_PATH; }
|
||||
catch (...) { return DIRENT_ERR_NO_PERM; }
|
||||
|
||||
Fs_handle_guard dir_guard(*this, _fs, dir_handle, _handle_space);
|
||||
Fs_handle_guard dir_guard(*this, _fs, *dir_handle, _handle_space);
|
||||
Directory_entry entry;
|
||||
|
||||
enum { DIRENT_SIZE = sizeof(Directory_entry) };
|
||||
|
|
|
@ -133,22 +133,22 @@ class Fs_log::Root_component :
|
|||
|
||||
Dir_handle dir_handle = ensure_dir(_fs, dir_path.base());
|
||||
Handle_guard dir_guard(_fs, dir_handle);
|
||||
File_handle handle;
|
||||
|
||||
Genode::Constructible<File_handle> handle;
|
||||
try {
|
||||
handle = _fs.file(dir_handle, file_name,
|
||||
File_system::WRITE_ONLY, false);
|
||||
handle.construct(_fs.file(dir_handle, file_name,
|
||||
File_system::WRITE_ONLY, false));
|
||||
|
||||
/* don't truncate at every new child session */
|
||||
if (truncate && (strcmp(label_prefix, "") == 0))
|
||||
_fs.truncate(handle, 0);
|
||||
_fs.truncate(*handle, 0);
|
||||
}
|
||||
catch (File_system::Lookup_failed) {
|
||||
handle = _fs.file(dir_handle, file_name,
|
||||
File_system::WRITE_ONLY, true);
|
||||
handle.construct(_fs.file(dir_handle, file_name,
|
||||
File_system::WRITE_ONLY, true));
|
||||
}
|
||||
|
||||
return new (md_alloc()) Session_component(_fs, handle, label_prefix);
|
||||
return new (md_alloc()) Session_component(_fs, *handle, label_prefix);
|
||||
}
|
||||
catch (Permission_denied) {
|
||||
errstr = "permission denied"; }
|
||||
|
|
|
@ -65,7 +65,7 @@ class Fs_rom::Rom_session_component :
|
|||
/**
|
||||
* Handle of associated file
|
||||
*/
|
||||
File_system::File_handle _file_handle;
|
||||
Genode::Constructible<File_system::File_handle> _file_handle;
|
||||
|
||||
/**
|
||||
* Size of current version of the file
|
||||
|
@ -83,7 +83,7 @@ class Fs_rom::Rom_session_component :
|
|||
* The compund directory is watched only if the requested file could
|
||||
* not be looked up.
|
||||
*/
|
||||
File_system::Node_handle _compound_dir_handle;
|
||||
Genode::Constructible<File_system::Dir_handle> _compound_dir_handle;
|
||||
|
||||
/**
|
||||
* Dataspace exposed as ROM module to the client
|
||||
|
@ -95,6 +95,11 @@ class Fs_rom::Rom_session_component :
|
|||
*/
|
||||
Genode::Signal_context_capability _sigh;
|
||||
|
||||
/*
|
||||
* Exception
|
||||
*/
|
||||
struct Open_compound_dir_failed { };
|
||||
|
||||
/**
|
||||
* Open compound directory of specified file
|
||||
*
|
||||
|
@ -130,9 +135,14 @@ class Fs_rom::Rom_session_component :
|
|||
*/
|
||||
if (!walk_up) break;
|
||||
}
|
||||
return Dir_handle(); /* invalid */
|
||||
throw Open_compound_dir_failed();
|
||||
}
|
||||
|
||||
/*
|
||||
* Exception
|
||||
*/
|
||||
struct Open_file_failed { };
|
||||
|
||||
/**
|
||||
* Open file with specified name at the file system
|
||||
*/
|
||||
|
@ -141,17 +151,18 @@ class Fs_rom::Rom_session_component :
|
|||
{
|
||||
using namespace File_system;
|
||||
|
||||
File_system::File_handle file_handle;
|
||||
|
||||
try {
|
||||
|
||||
Dir_handle dir = _open_compound_dir(fs, path, false);
|
||||
|
||||
try {
|
||||
|
||||
Handle_guard guard(fs, dir);
|
||||
|
||||
/* open file */
|
||||
Genode::Path<PATH_MAX_LEN> file_name(path.base());
|
||||
file_name.keep_only_last_element();
|
||||
file_handle = fs.file(dir, file_name.base() + 1,
|
||||
return fs.file(dir, file_name.base() + 1,
|
||||
File_system::READ_ONLY, false);
|
||||
}
|
||||
catch (Invalid_handle) { Genode::error(_file_path, ": Invalid_handle"); }
|
||||
|
@ -159,7 +170,11 @@ class Fs_rom::Rom_session_component :
|
|||
catch (Lookup_failed) { Genode::error(_file_path, ": lookup_failed"); }
|
||||
catch (...) { Genode::error(_file_path, ": unhandled error"); };
|
||||
|
||||
return file_handle;
|
||||
throw Open_file_failed();
|
||||
|
||||
} catch (Open_compound_dir_failed) {
|
||||
throw Open_file_failed();
|
||||
}
|
||||
}
|
||||
|
||||
void _register_for_compound_dir_changes()
|
||||
|
@ -167,19 +182,23 @@ class Fs_rom::Rom_session_component :
|
|||
using namespace File_system;
|
||||
|
||||
/* forget about the previously watched compound directory */
|
||||
if (_compound_dir_handle.valid())
|
||||
_fs.close(_compound_dir_handle);
|
||||
if (_compound_dir_handle.constructed()) {
|
||||
_fs.close(*_compound_dir_handle);
|
||||
_compound_dir_handle.destruct();
|
||||
}
|
||||
|
||||
_compound_dir_handle = _open_compound_dir(_fs, _file_path, true);
|
||||
try {
|
||||
_compound_dir_handle.construct(_open_compound_dir(_fs, _file_path, true));
|
||||
|
||||
/* register for changes in compound directory */
|
||||
if (_compound_dir_handle.valid())
|
||||
_fs.tx()->submit_packet(File_system::Packet_descriptor(
|
||||
_compound_dir_handle,
|
||||
*_compound_dir_handle,
|
||||
File_system::Packet_descriptor::CONTENT_CHANGED));
|
||||
else
|
||||
|
||||
} catch (Open_compound_dir_failed) {
|
||||
Genode::warning("could not track compound dir, giving up");
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Initialize '_file_ds' dataspace with file content
|
||||
|
@ -194,9 +213,8 @@ class Fs_rom::Rom_session_component :
|
|||
* content. The dataspace is re-allocated if the new version
|
||||
* of the file has become bigger.
|
||||
*/
|
||||
{
|
||||
try {
|
||||
File_handle const file_handle = _open_file(_fs, _file_path);
|
||||
if (file_handle.valid()) {
|
||||
File_system::file_size_t const new_file_size =
|
||||
_fs.status(file_handle).size;
|
||||
|
||||
|
@ -206,30 +224,35 @@ class Fs_rom::Rom_session_component :
|
|||
_file_size = 0;
|
||||
_file_seek = 0;
|
||||
}
|
||||
}
|
||||
_fs.close(file_handle);
|
||||
}
|
||||
} catch (Open_file_failed) { }
|
||||
|
||||
/* close and then re-open the file */
|
||||
if (_file_handle.valid())
|
||||
_fs.close(_file_handle);
|
||||
if (_file_handle.constructed()) {
|
||||
_fs.close(*_file_handle);
|
||||
_file_handle.destruct();
|
||||
}
|
||||
|
||||
_file_handle = _open_file(_fs, _file_path);
|
||||
try {
|
||||
_file_handle.construct(_open_file(_fs, _file_path));
|
||||
} catch (Open_file_failed) { }
|
||||
|
||||
/*
|
||||
* If we got the file, we can stop paying attention to the
|
||||
* compound directory.
|
||||
*/
|
||||
if (_file_handle.valid() && _compound_dir_handle.valid())
|
||||
_fs.close(_compound_dir_handle);
|
||||
if (_file_handle.constructed() && _compound_dir_handle.constructed()) {
|
||||
_fs.close(*_compound_dir_handle);
|
||||
_compound_dir_handle.destruct();
|
||||
}
|
||||
|
||||
/* register for file changes */
|
||||
if (_file_handle.valid())
|
||||
if (_file_handle.constructed())
|
||||
_fs.tx()->submit_packet(File_system::Packet_descriptor(
|
||||
_file_handle, File_system::Packet_descriptor::CONTENT_CHANGED));
|
||||
*_file_handle, File_system::Packet_descriptor::CONTENT_CHANGED));
|
||||
|
||||
size_t const file_size = _file_handle.valid()
|
||||
? _fs.status(_file_handle).size : 0;
|
||||
size_t const file_size = _file_handle.constructed()
|
||||
? _fs.status(*_file_handle).size : 0;
|
||||
|
||||
/* allocate new RAM dataspace according to file size */
|
||||
if (file_size > 0) {
|
||||
|
@ -255,7 +278,7 @@ class Fs_rom::Rom_session_component :
|
|||
source.bulk_buffer_size() / 2);
|
||||
File_system::Packet_descriptor
|
||||
packet(source.alloc_packet(chunk_size),
|
||||
_file_handle,
|
||||
*_file_handle,
|
||||
File_system::Packet_descriptor::READ,
|
||||
chunk_size,
|
||||
_file_seek);
|
||||
|
@ -284,10 +307,12 @@ class Fs_rom::Rom_session_component :
|
|||
:
|
||||
_env(env), _fs(fs),
|
||||
_file_path(file_path),
|
||||
_file_handle(_open_file(_fs, _file_path)),
|
||||
_file_ds(env.ram(), env.rm(), 0) /* realloc later */
|
||||
{
|
||||
if (!_file_handle.valid())
|
||||
try {
|
||||
_file_handle.construct(_open_file(_fs, _file_path));
|
||||
} catch (Open_file_failed) { }
|
||||
|
||||
_register_for_compound_dir_changes();
|
||||
}
|
||||
|
||||
|
@ -297,11 +322,11 @@ class Fs_rom::Rom_session_component :
|
|||
~Rom_session_component()
|
||||
{
|
||||
/* close re-open the file */
|
||||
if (_file_handle.valid())
|
||||
_fs.close(_file_handle);
|
||||
if (_file_handle.constructed())
|
||||
_fs.close(*_file_handle);
|
||||
|
||||
if (_compound_dir_handle.valid())
|
||||
_fs.close(_compound_dir_handle);
|
||||
if (_compound_dir_handle.constructed())
|
||||
_fs.close(*_compound_dir_handle);
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -327,8 +352,8 @@ class Fs_rom::Rom_session_component :
|
|||
switch (packet.operation()) {
|
||||
|
||||
case File_system::Packet_descriptor::CONTENT_CHANGED:
|
||||
if (_file_handle == packet.handle() ||
|
||||
_compound_dir_handle == packet.handle())
|
||||
if ((_file_handle.constructed() && (*_file_handle == packet.handle())) ||
|
||||
(_compound_dir_handle.constructed() && (*_compound_dir_handle == packet.handle())))
|
||||
{
|
||||
if (_sigh.valid())
|
||||
Genode::Signal_transmitter(_sigh).submit();
|
||||
|
@ -337,7 +362,7 @@ class Fs_rom::Rom_session_component :
|
|||
return false;
|
||||
|
||||
case File_system::Packet_descriptor::READ: {
|
||||
if (_file_handle != packet.handle())
|
||||
if (!(_file_handle.constructed() && (*_file_handle == packet.handle())))
|
||||
return false;
|
||||
|
||||
if (packet.position() > _file_seek || _file_seek >= _file_size) {
|
||||
|
|
|
@ -5,6 +5,13 @@
|
|||
* \date 2013-11-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _DIRECTORY_H_
|
||||
#define _DIRECTORY_H_
|
||||
|
||||
|
@ -19,13 +26,14 @@
|
|||
#include <lx_util.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Lx_fs {
|
||||
using namespace Genode;
|
||||
using namespace File_system;
|
||||
class Directory;
|
||||
}
|
||||
|
||||
|
||||
class File_system::Directory : public Node
|
||||
class Lx_fs::Directory : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -72,6 +80,16 @@ class File_system::Directory : public Node
|
|||
return fd;
|
||||
}
|
||||
|
||||
size_t _num_entries() const
|
||||
{
|
||||
unsigned num = 0;
|
||||
|
||||
rewinddir(_fd);
|
||||
while (readdir(_fd)) ++num;
|
||||
|
||||
return num;
|
||||
}
|
||||
|
||||
public:
|
||||
|
||||
Directory(Allocator &alloc, char const *path, bool create)
|
||||
|
@ -90,11 +108,10 @@ class File_system::Directory : public Node
|
|||
}
|
||||
|
||||
/* FIXME returned file node must be locked */
|
||||
File * file(char const *name, Mode mode, bool create)
|
||||
File * file(char const *name, Mode mode, bool create) override
|
||||
{
|
||||
File *file = new (&_alloc) File(dirfd(_fd), name, mode, create);
|
||||
|
||||
file->lock();
|
||||
return file;
|
||||
}
|
||||
|
||||
|
@ -105,7 +122,6 @@ class File_system::Directory : public Node
|
|||
|
||||
Directory *dir = new (&_alloc) Directory(_alloc, dir_path.base(), create);
|
||||
|
||||
dir->lock();
|
||||
return dir;
|
||||
}
|
||||
|
||||
|
@ -134,11 +150,10 @@ class File_system::Directory : public Node
|
|||
else
|
||||
throw Lookup_failed();
|
||||
|
||||
node->lock();
|
||||
return node;
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
if (len < sizeof(Directory_entry)) {
|
||||
Genode::error("read buffer too small for directory entry");
|
||||
|
@ -177,20 +192,19 @@ class File_system::Directory : public Node
|
|||
return sizeof(Directory_entry);
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* writing to directory nodes is not supported */
|
||||
return 0;
|
||||
}
|
||||
|
||||
size_t num_entries() const
|
||||
Status status() override
|
||||
{
|
||||
unsigned num = 0;
|
||||
|
||||
rewinddir(_fd);
|
||||
while (readdir(_fd)) ++num;
|
||||
|
||||
return num;
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = _num_entries() * sizeof(File_system::Directory_entry);
|
||||
s.mode = File_system::Status::MODE_DIRECTORY;
|
||||
return s;
|
||||
}
|
||||
};
|
||||
|
||||
|
|
|
@ -5,6 +5,13 @@
|
|||
* \date 2013-11-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _FILE_H_
|
||||
#define _FILE_H_
|
||||
|
||||
|
@ -13,12 +20,13 @@
|
|||
#include <lx_util.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Lx_fs {
|
||||
using namespace File_system;
|
||||
class File;
|
||||
}
|
||||
|
||||
|
||||
class File_system::File : public Node
|
||||
class Lx_fs::File : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -74,6 +82,16 @@ class File_system::File : public Node
|
|||
return fd;
|
||||
}
|
||||
|
||||
file_size_t _length() const
|
||||
{
|
||||
struct stat s;
|
||||
|
||||
if (fstat(_fd, &s) < 0)
|
||||
return 0;
|
||||
|
||||
return s.st_size;
|
||||
}
|
||||
|
||||
public:
|
||||
|
||||
File(int dir,
|
||||
|
@ -95,14 +113,14 @@ class File_system::File : public Node
|
|||
Node::name(basename(path));
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
int ret = pread(_fd, dst, len, seek_offset);
|
||||
|
||||
return ret == -1 ? 0 : ret;
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* should we append? */
|
||||
if (seek_offset == ~0ULL) {
|
||||
|
@ -117,17 +135,16 @@ class File_system::File : public Node
|
|||
return ret == -1 ? 0 : ret;
|
||||
}
|
||||
|
||||
file_size_t length() const
|
||||
Status status() override
|
||||
{
|
||||
struct stat s;
|
||||
|
||||
if (fstat(_fd, &s) < 0)
|
||||
return 0;
|
||||
|
||||
return s.st_size;
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = _length();
|
||||
s.mode = File_system::Status::MODE_FILE;
|
||||
return s;
|
||||
}
|
||||
|
||||
void truncate(file_size_t size)
|
||||
void truncate(file_size_t size) override
|
||||
{
|
||||
if (ftruncate(_fd, size)) /* nothing */;
|
||||
|
||||
|
|
|
@ -16,7 +16,7 @@
|
|||
#include <base/heap.h>
|
||||
#include <base/attached_rom_dataspace.h>
|
||||
#include <root/component.h>
|
||||
#include <file_system/node_handle_registry.h>
|
||||
#include <file_system/open_node.h>
|
||||
#include <file_system_session/rpc_object.h>
|
||||
#include <os/session_policy.h>
|
||||
#include <util/xml_node.h>
|
||||
|
@ -25,21 +25,28 @@
|
|||
#include <directory.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Lx_fs {
|
||||
|
||||
using namespace File_system;
|
||||
using File_system::Packet_descriptor;
|
||||
using File_system::Path;
|
||||
|
||||
struct Main;
|
||||
struct Session_component;
|
||||
struct Root;
|
||||
}
|
||||
|
||||
|
||||
class File_system::Session_component : public Session_rpc_object
|
||||
class Lx_fs::Session_component : public Session_rpc_object
|
||||
{
|
||||
private:
|
||||
|
||||
typedef File_system::Open_node<Node> Open_node;
|
||||
|
||||
Genode::Env &_env;
|
||||
Allocator &_md_alloc;
|
||||
Directory &_root;
|
||||
Node_handle_registry _handle_registry;
|
||||
Id_space<File_system::Node> _open_node_registry;
|
||||
bool _writable;
|
||||
|
||||
Signal_handler<Session_component> _process_packet_dispatcher;
|
||||
|
@ -54,7 +61,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
*
|
||||
* \return true on success, false on failure
|
||||
*/
|
||||
void _process_packet_op(Packet_descriptor &packet, Node &node)
|
||||
void _process_packet_op(Packet_descriptor &packet, Open_node &open_node)
|
||||
{
|
||||
void * const content = tx_sink()->packet_content(packet);
|
||||
size_t const length = packet.length();
|
||||
|
@ -66,18 +73,18 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
case Packet_descriptor::READ:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.read((char *)content, length, packet.position());
|
||||
res_length = open_node.node().read((char *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::WRITE:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.write((char const *)content, length, packet.position());
|
||||
res_length = open_node.node().write((char const *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::CONTENT_CHANGED:
|
||||
_handle_registry.register_notify(*tx_sink(), packet.handle());
|
||||
open_node.register_notify(*tx_sink());
|
||||
/* notify_listeners may bounce the packet back*/
|
||||
node.notify_listeners();
|
||||
open_node.node().notify_listeners();
|
||||
/* otherwise defer acknowledgement of this packet */
|
||||
return;
|
||||
|
||||
|
@ -98,13 +105,16 @@ class File_system::Session_component : public Session_rpc_object
|
|||
/* assume failure by default */
|
||||
packet.succeeded(false);
|
||||
|
||||
try {
|
||||
Node *node = _handle_registry.lookup_and_lock(packet.handle());
|
||||
Node_lock_guard guard(node);
|
||||
auto process_packet_fn = [&] (Open_node &open_node) {
|
||||
_process_packet_op(packet, open_node);
|
||||
};
|
||||
|
||||
_process_packet_op(packet, *node);
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(packet.handle(), process_packet_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
Genode::error("Invalid_handle");
|
||||
tx_sink()->acknowledge_packet(packet);
|
||||
}
|
||||
catch (Invalid_handle) { Genode::error("Invalid_handle"); }
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -191,23 +201,35 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_name(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup_and_lock(dir_handle);
|
||||
Node_lock_guard dir_guard(dir);
|
||||
auto file_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (!_writable)
|
||||
if (create || (mode != STAT_ONLY && mode != READ_ONLY))
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = dir->file(name.string(), mode, create);
|
||||
File *file = dir.file(name.string(), mode, create);
|
||||
|
||||
Node_lock_guard file_guard(file);
|
||||
return _handle_registry.alloc(file);
|
||||
Open_node *open_file =
|
||||
new (_md_alloc) Open_node(*file, _open_node_registry);
|
||||
|
||||
return open_file->id();
|
||||
};
|
||||
|
||||
try {
|
||||
return File_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, file_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Symlink_handle symlink(Dir_handle dir_handle, Name const &name, bool create)
|
||||
{
|
||||
Genode::error(__func__, " not implemented");
|
||||
return Symlink_handle();
|
||||
throw Permission_denied();
|
||||
}
|
||||
|
||||
Dir_handle dir(Path const &path, bool create)
|
||||
|
@ -226,8 +248,11 @@ class File_system::Session_component : public Session_rpc_object
|
|||
throw Name_too_long();
|
||||
|
||||
Directory *dir = _root.subdir(path_str, create);
|
||||
Node_lock_guard guard(dir);
|
||||
return _handle_registry.alloc(dir);
|
||||
|
||||
Open_node *open_dir =
|
||||
new (_md_alloc) Open_node(*dir, _open_node_registry);
|
||||
|
||||
return Dir_handle { open_dir->id().value };
|
||||
}
|
||||
|
||||
Node_handle node(Path const &path)
|
||||
|
@ -238,43 +263,38 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
Node *node = _root.node(path_str + 1);
|
||||
|
||||
Node_lock_guard guard(node);
|
||||
return _handle_registry.alloc(node);
|
||||
Open_node *open_node =
|
||||
new (_md_alloc) Open_node(*node, _open_node_registry);
|
||||
|
||||
return open_node->id();
|
||||
}
|
||||
|
||||
void close(Node_handle handle)
|
||||
{
|
||||
/* FIXME when to destruct node? */
|
||||
_handle_registry.free(handle);
|
||||
auto close_fn = [&] (Open_node &open_node) {
|
||||
Node &node = open_node.node();
|
||||
destroy(_md_alloc, &open_node);
|
||||
destroy(_md_alloc, &node);
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(handle, close_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Status status(Node_handle node_handle)
|
||||
{
|
||||
Node *node = _handle_registry.lookup_and_lock(node_handle);
|
||||
Node_lock_guard guard(node);
|
||||
auto status_fn = [&] (Open_node &open_node) {
|
||||
return open_node.node().status();
|
||||
};
|
||||
|
||||
Status s;
|
||||
s.inode = node->inode();
|
||||
s.size = 0;
|
||||
s.mode = 0;
|
||||
|
||||
File *file = dynamic_cast<File *>(node);
|
||||
if (file) {
|
||||
s.size = file->length();
|
||||
s.mode = File_system::Status::MODE_FILE;
|
||||
return s;
|
||||
try {
|
||||
return _open_node_registry.apply<Open_node>(node_handle, status_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
|
||||
Directory *dir = dynamic_cast<Directory *>(node);
|
||||
if (dir) {
|
||||
s.size = dir->num_entries()*sizeof(Directory_entry);
|
||||
s.mode = File_system::Status::MODE_DIRECTORY;
|
||||
return s;
|
||||
}
|
||||
|
||||
Genode::error(__func__, " for symlinks not implemented");
|
||||
|
||||
return Status();
|
||||
}
|
||||
|
||||
void control(Node_handle, Control)
|
||||
|
@ -292,9 +312,15 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = _handle_registry.lookup_and_lock(file_handle);
|
||||
Node_lock_guard file_guard(file);
|
||||
file->truncate(size);
|
||||
auto truncate_fn = [&] (Open_node &open_node) {
|
||||
open_node.node().truncate(size);
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(file_handle, truncate_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void move(Dir_handle, Name const &, Dir_handle, Name const &)
|
||||
|
@ -311,7 +337,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
};
|
||||
|
||||
|
||||
class File_system::Root : public Root_component<Session_component>
|
||||
class Lx_fs::Root : public Root_component<Session_component>
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -419,7 +445,7 @@ class File_system::Root : public Root_component<Session_component>
|
|||
};
|
||||
|
||||
|
||||
struct File_system::Main
|
||||
struct Lx_fs::Main
|
||||
{
|
||||
Genode::Env &env;
|
||||
|
||||
|
@ -434,4 +460,4 @@ struct File_system::Main
|
|||
};
|
||||
|
||||
|
||||
void Component::construct(Genode::Env &env) { static File_system::Main inst(env); }
|
||||
void Component::construct(Genode::Env &env) { static Lx_fs::Main inst(env); }
|
||||
|
|
|
@ -5,17 +5,27 @@
|
|||
* \date 2013-11-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _NODE_H_
|
||||
#define _NODE_H_
|
||||
|
||||
/* Genode includes */
|
||||
#include <file_system/listener.h>
|
||||
#include <file_system/node.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Lx_fs {
|
||||
using namespace File_system;
|
||||
class Node;
|
||||
class File;
|
||||
}
|
||||
|
||||
class Node : public Node_base
|
||||
class Lx_fs::Node : public File_system::Node_base
|
||||
{
|
||||
public:
|
||||
|
||||
|
@ -40,8 +50,25 @@ namespace File_system {
|
|||
|
||||
virtual size_t read(char *dst, size_t len, seek_off_t) = 0;
|
||||
virtual size_t write(char const *src, size_t len, seek_off_t) = 0;
|
||||
};
|
||||
|
||||
virtual Status status() = 0;
|
||||
|
||||
/*
|
||||
* File functionality
|
||||
*/
|
||||
virtual void truncate(file_size_t size)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-file node");
|
||||
}
|
||||
|
||||
/*
|
||||
* Directory functionality
|
||||
*/
|
||||
virtual File *file(char const *name, Mode mode, bool create)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return nullptr;
|
||||
}
|
||||
};
|
||||
|
||||
#endif /* _NODE_H_ */
|
||||
|
|
|
@ -7,6 +7,13 @@
|
|||
* FIXME unfinished
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2013-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _SYMLINK_H_
|
||||
#define _SYMLINK_H_
|
||||
|
||||
|
@ -26,18 +33,20 @@ class File_system::Symlink : public Node
|
|||
|
||||
char _link_to[MAX_PATH_LEN];
|
||||
|
||||
file_size_t _length() const { return strlen(_link_to) + 1; }
|
||||
|
||||
public:
|
||||
|
||||
Symlink(char const *name) { Node::name(name); }
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
size_t count = min(len, sizeof(_link_to) + 1);
|
||||
Genode::strncpy(dst, _link_to, count);
|
||||
return count;
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* Ideal symlink operations are atomic. */
|
||||
if (seek_offset) return 0;
|
||||
|
@ -47,7 +56,14 @@ class File_system::Symlink : public Node
|
|||
return count;
|
||||
}
|
||||
|
||||
file_size_t length() const { return strlen(_link_to) + 1; }
|
||||
Status status() override
|
||||
{
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = _length();
|
||||
s.mode = File_system::Status::MODE_SYMLINK;
|
||||
return s;
|
||||
}
|
||||
};
|
||||
|
||||
#endif /* _SYMLINK_H_ */
|
||||
|
|
|
@ -5,7 +5,7 @@
|
|||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2011-2017 Genode Labs GmbH
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
|
@ -18,32 +18,32 @@
|
|||
#include <file_system/util.h>
|
||||
|
||||
/* local includes */
|
||||
#include <ram_fs/node.h>
|
||||
#include <ram_fs/file.h>
|
||||
#include <ram_fs/symlink.h>
|
||||
#include "node.h"
|
||||
#include "file.h"
|
||||
#include "symlink.h"
|
||||
|
||||
namespace File_system { class Directory; }
|
||||
namespace Ram_fs { class Directory; }
|
||||
|
||||
|
||||
class File_system::Directory : public Node
|
||||
class Ram_fs::Directory : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
List<Node> _entries;
|
||||
size_t _num_entries;
|
||||
|
||||
public:
|
||||
|
||||
Directory(char const *name) : _num_entries(0) { Node::name(name); }
|
||||
|
||||
Node *entry_unsynchronized(size_t index)
|
||||
Node *_entry_unsynchronized(size_t index)
|
||||
{
|
||||
Node *node = _entries.first();
|
||||
for (unsigned i = 0; i < index && node; node = node->next(), i++);
|
||||
return node;
|
||||
}
|
||||
|
||||
bool has_sub_node_unsynchronized(char const *name) const
|
||||
public:
|
||||
|
||||
Directory(char const *name) : _num_entries(0) { Node::name(name); }
|
||||
|
||||
bool has_sub_node_unsynchronized(char const *name) const override
|
||||
{
|
||||
Node const *sub_node = _entries.first();
|
||||
for (; sub_node; sub_node = sub_node->next())
|
||||
|
@ -53,7 +53,7 @@ class File_system::Directory : public Node
|
|||
return false;
|
||||
}
|
||||
|
||||
void adopt_unsynchronized(Node *node)
|
||||
void adopt_unsynchronized(Node *node) override
|
||||
{
|
||||
/*
|
||||
* XXX inc ref counter
|
||||
|
@ -64,7 +64,7 @@ class File_system::Directory : public Node
|
|||
mark_as_updated();
|
||||
}
|
||||
|
||||
void discard_unsynchronized(Node *node)
|
||||
void discard(Node *node) override
|
||||
{
|
||||
_entries.remove(node);
|
||||
_num_entries--;
|
||||
|
@ -72,15 +72,14 @@ class File_system::Directory : public Node
|
|||
mark_as_updated();
|
||||
}
|
||||
|
||||
Node *lookup_and_lock(char const *path, bool return_parent = false)
|
||||
Node *lookup(char const *path, bool return_parent = false) override
|
||||
{
|
||||
if (strcmp(path, "") == 0) {
|
||||
lock();
|
||||
return this;
|
||||
}
|
||||
|
||||
if (!path || path[0] == '/')
|
||||
throw Lookup_failed();
|
||||
throw File_system::Lookup_failed();
|
||||
|
||||
/* find first path delimiter */
|
||||
unsigned i = 0;
|
||||
|
@ -91,7 +90,6 @@ class File_system::Directory : public Node
|
|||
* specified path.
|
||||
*/
|
||||
if (path[i] == 0 && return_parent) {
|
||||
lock();
|
||||
return this;
|
||||
}
|
||||
|
||||
|
@ -109,16 +107,15 @@ class File_system::Directory : public Node
|
|||
break;
|
||||
|
||||
if (!sub_node)
|
||||
throw Lookup_failed();
|
||||
throw File_system::Lookup_failed();
|
||||
|
||||
if (!contains_path_delimiter(path)) {
|
||||
if (!File_system::contains_path_delimiter(path)) {
|
||||
|
||||
/*
|
||||
* Because 'path' is a basename that corresponds to an
|
||||
* existing sub_node, we have found what we were looking
|
||||
* for.
|
||||
*/
|
||||
sub_node->lock();
|
||||
return sub_node;
|
||||
}
|
||||
|
||||
|
@ -134,59 +131,58 @@ class File_system::Directory : public Node
|
|||
*/
|
||||
Directory *sub_dir = dynamic_cast<Directory *>(sub_node);
|
||||
if (!sub_dir)
|
||||
throw Lookup_failed();
|
||||
throw File_system::Lookup_failed();
|
||||
|
||||
return sub_dir->lookup_and_lock(path + i + 1, return_parent);
|
||||
return sub_dir->lookup(path + i + 1, return_parent);
|
||||
}
|
||||
|
||||
Directory *lookup_and_lock_dir(char const *path)
|
||||
Directory *lookup_dir(char const *path)
|
||||
{
|
||||
Node *node = lookup_and_lock(path);
|
||||
Node *node = lookup(path);
|
||||
|
||||
Directory *dir = dynamic_cast<Directory *>(node);
|
||||
if (dir)
|
||||
return dir;
|
||||
|
||||
node->unlock();
|
||||
throw Lookup_failed();
|
||||
throw File_system::Lookup_failed();
|
||||
}
|
||||
|
||||
File *lookup_and_lock_file(char const *path)
|
||||
File *lookup_file(char const *path) override
|
||||
{
|
||||
Node *node = lookup_and_lock(path);
|
||||
Node *node = lookup(path);
|
||||
|
||||
File *file = dynamic_cast<File *>(node);
|
||||
if (file)
|
||||
return file;
|
||||
|
||||
node->unlock();
|
||||
throw Lookup_failed();
|
||||
throw File_system::Lookup_failed();
|
||||
}
|
||||
|
||||
Symlink *lookup_and_lock_symlink(char const *path)
|
||||
Symlink *lookup_symlink(char const *path)
|
||||
{
|
||||
Node *node = lookup_and_lock(path);
|
||||
Node *node = lookup(path);
|
||||
|
||||
Symlink *symlink = dynamic_cast<Symlink *>(node);
|
||||
if (symlink)
|
||||
return symlink;
|
||||
|
||||
node->unlock();
|
||||
throw Lookup_failed();
|
||||
throw File_system::Lookup_failed();
|
||||
}
|
||||
|
||||
/**
|
||||
* Lookup parent directory of the specified path
|
||||
*
|
||||
* \throw Lookup_failed
|
||||
* \throw File_system::Lookup_failed
|
||||
*/
|
||||
Directory *lookup_and_lock_parent(char const *path)
|
||||
Directory *lookup_parent(char const *path)
|
||||
{
|
||||
return static_cast<Directory *>(lookup_and_lock(path, true));
|
||||
return static_cast<Directory *>(lookup(path, true));
|
||||
}
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
using File_system::Directory_entry;
|
||||
|
||||
if (len < sizeof(Directory_entry)) {
|
||||
Genode::error("read buffer too small for directory entry");
|
||||
return 0;
|
||||
|
@ -199,7 +195,7 @@ class File_system::Directory : public Node
|
|||
return 0;
|
||||
}
|
||||
|
||||
Node *node = entry_unsynchronized(index);
|
||||
Node *node = _entry_unsynchronized(index);
|
||||
|
||||
/* index out of range */
|
||||
if (!node)
|
||||
|
@ -218,13 +214,20 @@ class File_system::Directory : public Node
|
|||
return sizeof(Directory_entry);
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* writing to directory nodes is not supported */
|
||||
return 0;
|
||||
}
|
||||
|
||||
size_t num_entries() const { return _num_entries; }
|
||||
Status status() override
|
||||
{
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = _num_entries * sizeof(File_system::Directory_entry);
|
||||
s.mode = File_system::Status::MODE_DIRECTORY;
|
||||
return s;
|
||||
}
|
||||
};
|
||||
|
||||
#endif /* _INCLUDE__RAM_FS__DIRECTORY_H_ */
|
|
@ -19,13 +19,20 @@
|
|||
#include <base/allocator.h>
|
||||
|
||||
/* local includes */
|
||||
#include <ram_fs/node.h>
|
||||
#include <ram_fs/chunk.h>
|
||||
#include "node.h"
|
||||
|
||||
namespace File_system { class File; }
|
||||
namespace Ram_fs
|
||||
{
|
||||
using File_system::Chunk;
|
||||
using File_system::Chunk_index;
|
||||
using File_system::file_size_t;
|
||||
using File_system::SEEK_TAIL;
|
||||
class File;
|
||||
}
|
||||
|
||||
|
||||
class File_system::File : public Node
|
||||
class Ram_fs::File : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -43,7 +50,7 @@ class File_system::File : public Node
|
|||
File(Allocator &alloc, char const *name)
|
||||
: _chunk(alloc, 0), _length(0) { Node::name(name); }
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
file_size_t const chunk_used_size = _chunk.used_size();
|
||||
|
||||
|
@ -79,7 +86,7 @@ class File_system::File : public Node
|
|||
return len;
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
if (seek_offset == SEEK_TAIL)
|
||||
seek_offset = _length;
|
||||
|
@ -102,9 +109,16 @@ class File_system::File : public Node
|
|||
return len;
|
||||
}
|
||||
|
||||
file_size_t length() const { return _length; }
|
||||
Status status() override
|
||||
{
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = _length;
|
||||
s.mode = File_system::Status::MODE_FILE;
|
||||
return s;
|
||||
}
|
||||
|
||||
void truncate(file_size_t size)
|
||||
void truncate(file_size_t size) override
|
||||
{
|
||||
if (size < _chunk.used_size())
|
||||
_chunk.truncate(size);
|
|
@ -12,7 +12,7 @@
|
|||
*/
|
||||
|
||||
/* Genode includes */
|
||||
#include <file_system/node_handle_registry.h>
|
||||
#include <file_system/open_node.h>
|
||||
#include <file_system_session/rpc_object.h>
|
||||
#include <base/component.h>
|
||||
#include <base/attached_rom_dataspace.h>
|
||||
|
@ -21,14 +21,18 @@
|
|||
#include <os/session_policy.h>
|
||||
|
||||
/* local includes */
|
||||
#include <ram_fs/directory.h>
|
||||
#include "directory.h"
|
||||
|
||||
|
||||
/*************************
|
||||
** File-system service **
|
||||
*************************/
|
||||
|
||||
namespace File_system {
|
||||
namespace Ram_fs {
|
||||
|
||||
using namespace File_system;
|
||||
using File_system::Packet_descriptor;
|
||||
using File_system::Path;
|
||||
|
||||
class Session_component;
|
||||
class Root;
|
||||
|
@ -36,15 +40,17 @@ namespace File_system {
|
|||
};
|
||||
|
||||
|
||||
class File_system::Session_component : public Session_rpc_object
|
||||
class Ram_fs::Session_component : public File_system::Session_rpc_object
|
||||
{
|
||||
private:
|
||||
|
||||
typedef File_system::Open_node<Node> Open_node;
|
||||
|
||||
Genode::Entrypoint &_ep;
|
||||
Genode::Ram_session &_ram;
|
||||
Genode::Allocator &_alloc;
|
||||
Directory &_root;
|
||||
Node_handle_registry _handle_registry;
|
||||
Id_space<File_system::Node> _open_node_registry;
|
||||
bool _writable;
|
||||
|
||||
Signal_handler<Session_component> _process_packet_handler;
|
||||
|
@ -59,7 +65,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
*
|
||||
* \return true on success, false on failure
|
||||
*/
|
||||
void _process_packet_op(Packet_descriptor &packet, Node &node)
|
||||
void _process_packet_op(Packet_descriptor &packet, Open_node &open_node)
|
||||
{
|
||||
void * const content = tx_sink()->packet_content(packet);
|
||||
size_t const length = packet.length();
|
||||
|
@ -71,17 +77,17 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
case Packet_descriptor::READ:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.read((char *)content, length, packet.position());
|
||||
res_length = open_node.node().read((char *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::WRITE:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.write((char const *)content, length, packet.position());
|
||||
res_length = open_node.node().write((char const *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::CONTENT_CHANGED:
|
||||
_handle_registry.register_notify(*tx_sink(), packet.handle());
|
||||
node.notify_listeners();
|
||||
open_node.register_notify(*tx_sink());
|
||||
open_node.node().notify_listeners();
|
||||
return;
|
||||
|
||||
case Packet_descriptor::READ_READY:
|
||||
|
@ -101,13 +107,13 @@ class File_system::Session_component : public Session_rpc_object
|
|||
/* assume failure by default */
|
||||
packet.succeeded(false);
|
||||
|
||||
try {
|
||||
Node *node = _handle_registry.lookup_and_lock(packet.handle());
|
||||
Node_lock_guard guard(node);
|
||||
auto process_packet_fn = [&] (Open_node &open_node) {
|
||||
_process_packet_op(packet, open_node);
|
||||
};
|
||||
|
||||
_process_packet_op(packet, *node);
|
||||
}
|
||||
catch (Invalid_handle) {
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(packet.handle(), process_packet_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
Genode::error("Invalid_handle");
|
||||
tx_sink()->acknowledge_packet(packet);
|
||||
}
|
||||
|
@ -193,8 +199,9 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_name(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup_and_lock(dir_handle);
|
||||
Node_lock_guard dir_guard(dir);
|
||||
auto file_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (!_writable)
|
||||
if (mode != STAT_ONLY && mode != READ_ONLY)
|
||||
|
@ -205,21 +212,33 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
if (dir->has_sub_node_unsynchronized(name.string()))
|
||||
if (dir.has_sub_node_unsynchronized(name.string()))
|
||||
throw Node_already_exists();
|
||||
|
||||
try {
|
||||
File * const file = new (_alloc)
|
||||
File(_alloc, name.string());
|
||||
|
||||
dir->adopt_unsynchronized(file);
|
||||
dir.adopt_unsynchronized(file);
|
||||
}
|
||||
catch (Allocator::Out_of_memory) { throw No_space(); }
|
||||
}
|
||||
|
||||
File *file = dir->lookup_and_lock_file(name.string());
|
||||
Node_lock_guard file_guard(file);
|
||||
return _handle_registry.alloc(file);
|
||||
File *file = dir.lookup_file(name.string());
|
||||
|
||||
Open_node *open_file =
|
||||
new (_alloc) Open_node(*file, _open_node_registry);
|
||||
|
||||
return open_file->id();
|
||||
};
|
||||
|
||||
try {
|
||||
return File_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, file_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Symlink_handle symlink(Dir_handle dir_handle, Name const &name, bool create)
|
||||
|
@ -227,29 +246,42 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_name(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup_and_lock(dir_handle);
|
||||
Node_lock_guard dir_guard(dir);
|
||||
auto symlink_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (create) {
|
||||
|
||||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
if (dir->has_sub_node_unsynchronized(name.string()))
|
||||
if (dir.has_sub_node_unsynchronized(name.string()))
|
||||
throw Node_already_exists();
|
||||
|
||||
try {
|
||||
Symlink * const symlink = new (_alloc)
|
||||
Symlink(name.string());
|
||||
|
||||
dir->adopt_unsynchronized(symlink);
|
||||
dir.adopt_unsynchronized(symlink);
|
||||
}
|
||||
catch (Allocator::Out_of_memory) { throw No_space(); }
|
||||
}
|
||||
|
||||
Symlink *symlink = dir->lookup_and_lock_symlink(name.string());
|
||||
Node_lock_guard file_guard(symlink);
|
||||
return _handle_registry.alloc(symlink);
|
||||
Symlink *symlink = dir.lookup_symlink(name.string());
|
||||
|
||||
Open_node *open_symlink =
|
||||
new (_alloc) Open_node(*symlink, _open_node_registry);
|
||||
|
||||
return open_symlink->id();
|
||||
};
|
||||
|
||||
try {
|
||||
return Symlink_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, symlink_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Dir_handle dir(Path const &path, bool create)
|
||||
|
@ -269,9 +301,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!path.valid_string())
|
||||
throw Name_too_long();
|
||||
|
||||
Directory *parent = _root.lookup_and_lock_parent(path_str);
|
||||
|
||||
Node_lock_guard guard(parent);
|
||||
Directory *parent = _root.lookup_parent(path_str);
|
||||
|
||||
char const *name = basename(path_str);
|
||||
|
||||
|
@ -285,55 +315,61 @@ class File_system::Session_component : public Session_rpc_object
|
|||
}
|
||||
}
|
||||
|
||||
Directory *dir = _root.lookup_and_lock_dir(path_str);
|
||||
Node_lock_guard guard(dir);
|
||||
return _handle_registry.alloc(dir);
|
||||
Directory *dir = _root.lookup_dir(path_str);
|
||||
|
||||
Open_node *open_dir =
|
||||
new (_alloc) Open_node(*dir, _open_node_registry);
|
||||
|
||||
return Dir_handle { open_dir->id().value };
|
||||
}
|
||||
|
||||
Node_handle node(Path const &path)
|
||||
{
|
||||
_assert_valid_path(path.string());
|
||||
|
||||
Node *node = _root.lookup_and_lock(path.string() + 1);
|
||||
Node *node = _root.lookup(path.string() + 1);
|
||||
|
||||
Node_lock_guard guard(node);
|
||||
return _handle_registry.alloc(node);
|
||||
Open_node *open_node =
|
||||
new (_alloc) Open_node(*node, _open_node_registry);
|
||||
|
||||
return open_node->id();
|
||||
}
|
||||
|
||||
void close(Node_handle handle)
|
||||
{
|
||||
_handle_registry.free(handle);
|
||||
auto close_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &node = open_node.node();
|
||||
|
||||
/*
|
||||
* Notify listeners about the changed file.
|
||||
*/
|
||||
node.notify_listeners();
|
||||
|
||||
/*
|
||||
* De-allocate handle
|
||||
*/
|
||||
destroy(_alloc, &open_node);
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(handle, close_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Status status(Node_handle node_handle)
|
||||
{
|
||||
Node *node = _handle_registry.lookup_and_lock(node_handle);
|
||||
Node_lock_guard guard(node);
|
||||
auto status_fn = [&] (Open_node &open_node) {
|
||||
return open_node.node().status();
|
||||
};
|
||||
|
||||
Status s;
|
||||
s.inode = node->inode();
|
||||
s.size = 0;
|
||||
s.mode = 0;
|
||||
|
||||
File *file = dynamic_cast<File *>(node);
|
||||
if (file) {
|
||||
s.size = file->length();
|
||||
s.mode = File_system::Status::MODE_FILE;
|
||||
return s;
|
||||
try {
|
||||
return _open_node_registry.apply<Open_node>(node_handle, status_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
Directory *dir = dynamic_cast<Directory *>(node);
|
||||
if (dir) {
|
||||
s.size = dir->num_entries()*sizeof(Directory_entry);
|
||||
s.mode = File_system::Status::MODE_DIRECTORY;
|
||||
return s;
|
||||
}
|
||||
Symlink *symlink = dynamic_cast<Symlink *>(node);
|
||||
if (symlink) {
|
||||
s.size = symlink->length();
|
||||
s.mode = File_system::Status::MODE_SYMLINK;
|
||||
return s;
|
||||
}
|
||||
return Status();
|
||||
}
|
||||
|
||||
void control(Node_handle, Control) { }
|
||||
|
@ -346,18 +382,25 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
Directory *dir = _handle_registry.lookup_and_lock(dir_handle);
|
||||
Node_lock_guard dir_guard(dir);
|
||||
auto unlink_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node *node = dir->lookup_and_lock(name.string());
|
||||
Node &dir = open_node.node();
|
||||
|
||||
dir->discard_unsynchronized(node);
|
||||
Node *node = dir.lookup(name.string());
|
||||
|
||||
dir.discard(node);
|
||||
|
||||
// XXX implement ref counting, do not destroy node that is
|
||||
// is still referenced by a node handle
|
||||
|
||||
node->unlock();
|
||||
destroy(_alloc, node);
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, unlink_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void truncate(File_handle file_handle, file_size_t size)
|
||||
|
@ -365,9 +408,15 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!_writable)
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = _handle_registry.lookup_and_lock(file_handle);
|
||||
Node_lock_guard file_guard(file);
|
||||
file->truncate(size);
|
||||
auto truncate_fn = [&] (Open_node &open_node) {
|
||||
open_node.node().truncate(size);
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(file_handle, truncate_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void move(Dir_handle from_dir_handle, Name const &from_name,
|
||||
|
@ -382,19 +431,21 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_name(to_name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *from_dir = _handle_registry.lookup_and_lock(from_dir_handle);
|
||||
Node_lock_guard from_dir_guard(from_dir);
|
||||
auto move_fn = [&] (Open_node &open_from_dir_node) {
|
||||
|
||||
Node *node = from_dir->lookup_and_lock(from_name.string());
|
||||
Node_lock_guard node_guard(node);
|
||||
auto inner_move_fn = [&] (Open_node &open_to_dir_node) {
|
||||
|
||||
Node &from_dir = open_from_dir_node.node();
|
||||
|
||||
Node *node = from_dir.lookup(from_name.string());
|
||||
node->name(to_name.string());
|
||||
|
||||
if (!_handle_registry.refer_to_same_node(from_dir_handle, to_dir_handle)) {
|
||||
Directory *to_dir = _handle_registry.lookup_and_lock(to_dir_handle);
|
||||
Node_lock_guard to_dir_guard(to_dir);
|
||||
Node &to_dir = open_to_dir_node.node();
|
||||
|
||||
from_dir->discard_unsynchronized(node);
|
||||
to_dir->adopt_unsynchronized(node);
|
||||
if (&to_dir != &from_dir) {
|
||||
|
||||
from_dir.discard(node);
|
||||
to_dir.adopt_unsynchronized(node);
|
||||
|
||||
/*
|
||||
* If the file was moved from one directory to another we
|
||||
|
@ -402,27 +453,47 @@ class File_system::Session_component : public Session_rpc_object
|
|||
* directory 'from_dir' will always get notified (i.e.,
|
||||
* when just the file name was changed) below.
|
||||
*/
|
||||
to_dir->mark_as_updated();
|
||||
to_dir->notify_listeners();
|
||||
}
|
||||
to_dir.mark_as_updated();
|
||||
to_dir.notify_listeners();
|
||||
|
||||
from_dir->mark_as_updated();
|
||||
from_dir->notify_listeners();
|
||||
from_dir.mark_as_updated();
|
||||
from_dir.notify_listeners();
|
||||
|
||||
node->mark_as_updated();
|
||||
node->notify_listeners();
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(to_dir_handle, inner_move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(from_dir_handle, move_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void sync(Node_handle handle) override
|
||||
{
|
||||
Node *node = _handle_registry.lookup_and_lock(handle);
|
||||
Node_lock_guard guard(node);
|
||||
node->notify_listeners();
|
||||
auto sync_fn = [&] (Open_node &open_node) {
|
||||
open_node.node().notify_listeners();
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(handle, sync_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
class File_system::Root : public Root_component<Session_component>
|
||||
class Ram_fs::Root : public Root_component<Session_component>
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -493,9 +564,8 @@ class File_system::Root : public Root_component<Session_component>
|
|||
* delimiter. For performing the lookup, we skip the first
|
||||
* character.
|
||||
*/
|
||||
session_root_dir = _root_dir.lookup_and_lock_dir(
|
||||
session_root_dir = _root_dir.lookup_dir(
|
||||
session_root.base() + 1);
|
||||
session_root_dir->unlock();
|
||||
}
|
||||
catch (Lookup_failed) { throw Service_denied(); }
|
||||
}
|
||||
|
@ -588,7 +658,7 @@ struct Attribute_string
|
|||
static void preload_content(Genode::Env &env,
|
||||
Genode::Allocator &alloc,
|
||||
Genode::Xml_node node,
|
||||
File_system::Directory &dir)
|
||||
Ram_fs::Directory &dir)
|
||||
{
|
||||
using namespace File_system;
|
||||
|
||||
|
@ -606,7 +676,7 @@ static void preload_content(Genode::Env &env,
|
|||
*/
|
||||
if (sub_node.has_type("dir")) {
|
||||
|
||||
Directory *sub_dir = new (&alloc) Directory(name);
|
||||
Ram_fs::Directory *sub_dir = new (&alloc) Ram_fs::Directory(name);
|
||||
|
||||
/* traverse into the new directory */
|
||||
preload_content(env, alloc, sub_node, *sub_dir);
|
||||
|
@ -626,7 +696,7 @@ static void preload_content(Genode::Env &env,
|
|||
try {
|
||||
Attached_rom_dataspace rom(env, name);
|
||||
|
||||
File *file = new (&alloc) File(alloc, as);
|
||||
Ram_fs::File *file = new (&alloc) Ram_fs::File(alloc, as);
|
||||
file->write(rom.local_addr<char>(), rom.size(), 0);
|
||||
dir.adopt_unsynchronized(file);
|
||||
}
|
||||
|
@ -641,7 +711,7 @@ static void preload_content(Genode::Env &env,
|
|||
*/
|
||||
if (sub_node.has_type("inline")) {
|
||||
|
||||
File *file = new (&alloc) File(alloc, name);
|
||||
Ram_fs::File *file = new (&alloc) Ram_fs::File(alloc, name);
|
||||
file->write(sub_node.content_addr(), sub_node.content_size(), 0);
|
||||
dir.adopt_unsynchronized(file);
|
||||
}
|
||||
|
@ -649,7 +719,7 @@ static void preload_content(Genode::Env &env,
|
|||
}
|
||||
|
||||
|
||||
struct File_system::Main
|
||||
struct Ram_fs::Main
|
||||
{
|
||||
Genode::Env &_env;
|
||||
|
||||
|
@ -679,4 +749,4 @@ struct File_system::Main
|
|||
};
|
||||
|
||||
|
||||
void Component::construct(Genode::Env &env) { static File_system::Main inst(env); }
|
||||
void Component::construct(Genode::Env &env) { static Ram_fs::Main inst(env); }
|
||||
|
|
120
repos/os/src/server/ram_fs/node.h
Normal file
120
repos/os/src/server/ram_fs/node.h
Normal file
|
@ -0,0 +1,120 @@
|
|||
/*
|
||||
* \brief File-system node
|
||||
* \author Norman Feske
|
||||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _INCLUDE__RAM_FS__NODE_H_
|
||||
#define _INCLUDE__RAM_FS__NODE_H_
|
||||
|
||||
/* Genode includes */
|
||||
#include <file_system/listener.h>
|
||||
#include <file_system/node.h>
|
||||
#include <util/list.h>
|
||||
|
||||
namespace Ram_fs {
|
||||
using namespace Genode;
|
||||
using File_system::seek_off_t;
|
||||
using File_system::Status;
|
||||
class Node;
|
||||
class File;
|
||||
class Symlink;
|
||||
}
|
||||
|
||||
|
||||
class Ram_fs::Node : public File_system::Node_base, public List<Node>::Element
|
||||
{
|
||||
public:
|
||||
|
||||
typedef char Name[128];
|
||||
|
||||
private:
|
||||
|
||||
int _ref_count;
|
||||
Name _name;
|
||||
unsigned long const _inode;
|
||||
|
||||
/**
|
||||
* Generate unique inode number
|
||||
*/
|
||||
static unsigned long _unique_inode()
|
||||
{
|
||||
static unsigned long inode_count;
|
||||
return ++inode_count;
|
||||
}
|
||||
|
||||
public:
|
||||
|
||||
Node()
|
||||
: _ref_count(0), _inode(_unique_inode())
|
||||
{ _name[0] = 0; }
|
||||
|
||||
unsigned long inode() const { return _inode; }
|
||||
char const *name() const { return _name; }
|
||||
|
||||
/**
|
||||
* Assign name
|
||||
*/
|
||||
void name(char const *name) { strncpy(_name, name, sizeof(_name)); }
|
||||
|
||||
virtual size_t read(char *dst, size_t len, seek_off_t) = 0;
|
||||
virtual size_t write(char const *src, size_t len, seek_off_t) = 0;
|
||||
|
||||
virtual Status status() = 0;
|
||||
|
||||
|
||||
/* File functionality */
|
||||
|
||||
virtual void truncate(File_system::file_size_t size)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-file node");
|
||||
}
|
||||
|
||||
|
||||
/* Directory functionality */
|
||||
|
||||
virtual bool has_sub_node_unsynchronized(char const *name) const
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return false;
|
||||
}
|
||||
|
||||
virtual void adopt_unsynchronized(Node *node)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
}
|
||||
|
||||
virtual File *lookup_file(char const *path)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
virtual Symlink *lookup_symlink(char const *path)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
virtual Node *lookup(char const *path, bool return_parent = false)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
virtual void discard(Node *node)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
}
|
||||
|
||||
|
||||
};
|
||||
|
||||
#endif /* _INCLUDE__RAM_FS__NODE_H_ */
|
|
@ -15,30 +15,30 @@
|
|||
#define _INCLUDE__RAM_FS__SYMLINK_H_
|
||||
|
||||
/* local includes */
|
||||
#include <ram_fs/node.h>
|
||||
#include "node.h"
|
||||
|
||||
namespace File_system { class Symlink; }
|
||||
namespace Ram_fs { class Symlink; }
|
||||
|
||||
|
||||
class File_system::Symlink : public Node
|
||||
class Ram_fs::Symlink : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
char _link_to[MAX_PATH_LEN];
|
||||
char _link_to[File_system::MAX_PATH_LEN];
|
||||
size_t _len;
|
||||
|
||||
public:
|
||||
|
||||
Symlink(char const *name): _len(0) { Node::name(name); }
|
||||
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset)
|
||||
size_t read(char *dst, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
size_t count = min(len, _len-seek_offset);
|
||||
Genode::memcpy(dst, _link_to+seek_offset, count);
|
||||
return count;
|
||||
}
|
||||
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset)
|
||||
size_t write(char const *src, size_t len, seek_off_t seek_offset) override
|
||||
{
|
||||
/* Ideal symlink operations are atomic. */
|
||||
if (seek_offset) return 0;
|
||||
|
@ -48,7 +48,14 @@ class File_system::Symlink : public Node
|
|||
return _len;
|
||||
}
|
||||
|
||||
file_size_t length() const { return _len; }
|
||||
Status status() override
|
||||
{
|
||||
Status s;
|
||||
s.inode = inode();
|
||||
s.size = _len;
|
||||
s.mode = File_system::Status::MODE_SYMLINK;
|
||||
return s;
|
||||
}
|
||||
};
|
||||
|
||||
#endif /* _INCLUDE__RAM_FS__SYMLINK_H_ */
|
|
@ -4,6 +4,13 @@
|
|||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _DIRECTORY_H_
|
||||
#define _DIRECTORY_H_
|
||||
|
||||
|
@ -15,9 +22,11 @@
|
|||
#include <file.h>
|
||||
#include <symlink.h>
|
||||
|
||||
namespace File_system {
|
||||
namespace Trace_fs {
|
||||
class Directory;
|
||||
}
|
||||
|
||||
class Directory : public Node
|
||||
class Trace_fs::Directory : public Node
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -86,7 +95,7 @@ namespace File_system {
|
|||
* \return node node founc
|
||||
* \throws Lookup_failed
|
||||
*/
|
||||
Node *lookup(char const *path, bool return_parent = false)
|
||||
Node *lookup(char const *path, bool return_parent = false) override
|
||||
{
|
||||
if (strcmp(path, "") == 0) {
|
||||
return this;
|
||||
|
@ -209,6 +218,5 @@ namespace File_system {
|
|||
return s;
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#endif /* _DIRECTORY_H_ */
|
||||
|
|
|
@ -23,13 +23,17 @@
|
|||
#include <node.h>
|
||||
#include <chunk.h>
|
||||
|
||||
namespace File_system {
|
||||
namespace Trace_fs {
|
||||
class Changeable_content;
|
||||
class File;
|
||||
class Buffered_file;
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
*
|
||||
*/
|
||||
class Changeable_content
|
||||
class Trace_fs::Changeable_content
|
||||
{
|
||||
protected:
|
||||
|
||||
|
@ -78,7 +82,7 @@ namespace File_system {
|
|||
* File interface
|
||||
*/
|
||||
|
||||
class File : public Node
|
||||
class Trace_fs::File : public Node
|
||||
{
|
||||
public:
|
||||
|
||||
|
@ -114,7 +118,7 @@ namespace File_system {
|
|||
* This file merely exists in memory and grows automatically.
|
||||
*/
|
||||
|
||||
class Buffered_file : public File
|
||||
class Trace_fs::Buffered_file : public File
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -202,7 +206,7 @@ namespace File_system {
|
|||
|
||||
virtual file_size_t length() const { return _length; }
|
||||
|
||||
void truncate(file_size_t size)
|
||||
void truncate(file_size_t size) override
|
||||
{
|
||||
if (size < _chunk.used_size())
|
||||
_chunk.truncate(size);
|
||||
|
@ -212,6 +216,5 @@ namespace File_system {
|
|||
mark_as_updated();
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#endif /* _FILE_H_ */
|
||||
|
|
|
@ -22,10 +22,12 @@
|
|||
#include <trace_files.h>
|
||||
|
||||
namespace Trace_fs {
|
||||
|
||||
typedef Genode::size_t size_t;
|
||||
class Followed_subject;
|
||||
class Followed_subject_registry;
|
||||
}
|
||||
|
||||
struct Followed_subject : public File_system::Directory
|
||||
class Trace_fs::Followed_subject : public Directory
|
||||
{
|
||||
public:
|
||||
|
||||
|
@ -93,12 +95,12 @@ namespace Trace_fs {
|
|||
|
||||
public:
|
||||
|
||||
File_system::Active_file active_file;
|
||||
File_system::Buffer_size_file buffer_size_file;
|
||||
File_system::Cleanup_file cleanup_file;
|
||||
File_system::Enable_file enable_file;
|
||||
File_system::Events_file events_file;
|
||||
File_system::Policy_file policy_file;
|
||||
Active_file active_file;
|
||||
Buffer_size_file buffer_size_file;
|
||||
Cleanup_file cleanup_file;
|
||||
Enable_file enable_file;
|
||||
Events_file events_file;
|
||||
Policy_file policy_file;
|
||||
|
||||
Followed_subject(Genode::Allocator &md_alloc, char const *name,
|
||||
Genode::Region_map &rm,
|
||||
|
@ -172,7 +174,7 @@ namespace Trace_fs {
|
|||
/**
|
||||
* This registry contains all current followed trace subjects
|
||||
*/
|
||||
class Followed_subject_registry
|
||||
class Trace_fs::Followed_subject_registry
|
||||
{
|
||||
public:
|
||||
|
||||
|
@ -277,6 +279,5 @@ namespace Trace_fs {
|
|||
throw Invalid_subject();
|
||||
}
|
||||
};
|
||||
}
|
||||
|
||||
#endif /* _SUBJECT_REGISTRY_H_ */
|
||||
|
|
|
@ -13,7 +13,7 @@
|
|||
|
||||
/* Genode includes */
|
||||
#include <base/component.h>
|
||||
#include <file_system/node_handle_registry.h>
|
||||
#include <file_system/open_node.h>
|
||||
#include <file_system_session/rpc_object.h>
|
||||
#include <base/attached_rom_dataspace.h>
|
||||
#include <os/session_policy.h>
|
||||
|
@ -33,6 +33,18 @@
|
|||
#include <trace_files.h>
|
||||
|
||||
|
||||
namespace Trace_fs {
|
||||
|
||||
using File_system::Packet_descriptor;
|
||||
using File_system::Path;
|
||||
|
||||
class Trace_file_system;
|
||||
struct Main;
|
||||
struct Session_component;
|
||||
struct Root;
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Return true if 'str' is a valid file name
|
||||
*/
|
||||
|
@ -59,7 +71,7 @@ static inline bool valid_filename(char const *str)
|
|||
* needed, refreshing their content or deleting them if they are no
|
||||
* longer of any use.
|
||||
*/
|
||||
class Trace_file_system
|
||||
class Trace_fs::Trace_file_system
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -70,13 +82,6 @@ class Trace_file_system
|
|||
typedef Genode::Trace::Subject_info Subject_info;
|
||||
typedef Genode::Trace::Connection Trace;
|
||||
|
||||
typedef Trace_fs::Followed_subject_registry Followed_subject_registry;
|
||||
typedef Trace_fs::Followed_subject Followed_subject;
|
||||
|
||||
typedef File_system::Directory Directory;
|
||||
typedef File_system::Node Node;
|
||||
|
||||
|
||||
/**
|
||||
* Simple node list
|
||||
*
|
||||
|
@ -95,9 +100,9 @@ class Trace_file_system
|
|||
*/
|
||||
struct Node_list_entry : public Genode::List<Node_list_entry>::Element
|
||||
{
|
||||
File_system::Node *node;
|
||||
Node *node;
|
||||
|
||||
Node_list_entry(File_system::Node *n) : node(n) { }
|
||||
Node_list_entry(Node *n) : node(n) { }
|
||||
};
|
||||
|
||||
Genode::Allocator &_md_alloc;
|
||||
|
@ -598,22 +603,17 @@ class Trace_file_system
|
|||
};
|
||||
|
||||
|
||||
namespace File_system {
|
||||
struct Main;
|
||||
struct Session_component;
|
||||
struct Root;
|
||||
}
|
||||
|
||||
|
||||
class File_system::Session_component : public Session_rpc_object
|
||||
class Trace_fs::Session_component : public Session_rpc_object
|
||||
{
|
||||
private:
|
||||
|
||||
typedef File_system::Open_node<Node> Open_node;
|
||||
|
||||
Genode::Entrypoint &_ep;
|
||||
Ram_session &_ram;
|
||||
Allocator &_md_alloc;
|
||||
Directory &_root_dir;
|
||||
Node_handle_registry _handle_registry;
|
||||
Id_space<File_system::Node> _open_node_registry;
|
||||
bool _writeable;
|
||||
|
||||
unsigned _subject_limit;
|
||||
|
@ -647,7 +647,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
/**
|
||||
* Perform packet operation
|
||||
*/
|
||||
void _process_packet_op(Packet_descriptor &packet, Node &node)
|
||||
void _process_packet_op(Packet_descriptor &packet, Open_node &open_node)
|
||||
{
|
||||
void * const content = tx_sink()->packet_content(packet);
|
||||
size_t const length = packet.length();
|
||||
|
@ -659,18 +659,18 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
case Packet_descriptor::READ:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.read((char *)content, length, packet.position());
|
||||
res_length = open_node.node().read((char *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::WRITE:
|
||||
if (content && (packet.length() <= packet.size()))
|
||||
res_length = node.write((char const *)content, length, packet.position());
|
||||
res_length = open_node.node().write((char const *)content, length, packet.position());
|
||||
break;
|
||||
|
||||
case Packet_descriptor::CONTENT_CHANGED:
|
||||
_handle_registry.register_notify(*tx_sink(), packet.handle());
|
||||
open_node.register_notify(*tx_sink());
|
||||
/* notify_listeners may bounce the packet back*/
|
||||
node.notify_listeners();
|
||||
open_node.node().notify_listeners();
|
||||
/* otherwise defer acknowledgement of this packet */
|
||||
return;
|
||||
|
||||
|
@ -691,11 +691,15 @@ class File_system::Session_component : public Session_rpc_object
|
|||
/* assume failure by default */
|
||||
packet.succeeded(false);
|
||||
|
||||
auto process_packet_fn = [&] (Open_node &open_node) {
|
||||
_process_packet_op(packet, open_node);
|
||||
};
|
||||
|
||||
try {
|
||||
Node *node = _handle_registry.lookup(packet.handle());
|
||||
_process_packet_op(packet, *node);
|
||||
_open_node_registry.apply<Open_node>(packet.handle(), process_packet_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
Genode::error("Invalid_handle");
|
||||
}
|
||||
catch (Invalid_handle) { Genode::error("Invalid_handle"); }
|
||||
|
||||
/*
|
||||
* The 'acknowledge_packet' function cannot block because we
|
||||
|
@ -753,7 +757,7 @@ class File_system::Session_component : public Session_rpc_object
|
|||
Genode::Ram_session &ram,
|
||||
Genode::Region_map &rm,
|
||||
Genode::Env &env,
|
||||
File_system::Directory &root_dir,
|
||||
Directory &root_dir,
|
||||
Allocator &md_alloc,
|
||||
unsigned subject_limit,
|
||||
unsigned poll_interval,
|
||||
|
@ -814,22 +818,36 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!valid_filename(name.string()))
|
||||
throw Invalid_name();
|
||||
|
||||
Directory *dir = _handle_registry.lookup(dir_handle);
|
||||
auto file_fn = [&] (Open_node &open_node) {
|
||||
|
||||
Node &dir = open_node.node();
|
||||
|
||||
if (create)
|
||||
throw Permission_denied();
|
||||
|
||||
File *file = dynamic_cast<File*>(dir->lookup(name.string()));
|
||||
File *file = dynamic_cast<File*>(dir.lookup(name.string()));
|
||||
if (!file)
|
||||
throw Invalid_name();
|
||||
|
||||
return _handle_registry.alloc(file);
|
||||
Open_node *open_file =
|
||||
new (_md_alloc) Open_node(*file, _open_node_registry);
|
||||
|
||||
return open_file->id();
|
||||
};
|
||||
|
||||
try {
|
||||
return File_handle {
|
||||
_open_node_registry.apply<Open_node>(dir_handle, file_fn).value
|
||||
};
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Symlink_handle symlink(Dir_handle dir_handle, Name const &name, bool create)
|
||||
{
|
||||
Genode::warning("symlinks not supported");
|
||||
return Symlink_handle();
|
||||
throw Permission_denied();
|
||||
}
|
||||
|
||||
Dir_handle dir(Path const &path, bool create)
|
||||
|
@ -848,7 +866,10 @@ class File_system::Session_component : public Session_rpc_object
|
|||
if (!dir)
|
||||
throw Invalid_name();
|
||||
|
||||
return _handle_registry.alloc(dir);
|
||||
Open_node *open_dir =
|
||||
new (_md_alloc) Open_node(*dir, _open_node_registry);
|
||||
|
||||
return Dir_handle { open_dir->id().value };
|
||||
}
|
||||
|
||||
Node_handle node(Path const &path)
|
||||
|
@ -859,40 +880,61 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
Node *node = _root_dir.lookup(path_str + 1);
|
||||
|
||||
return _handle_registry.alloc(node);
|
||||
Open_node *open_node =
|
||||
new (_md_alloc) Open_node(*node, _open_node_registry);
|
||||
|
||||
return open_node->id();
|
||||
}
|
||||
|
||||
void close(Node_handle handle)
|
||||
{
|
||||
Node *node;
|
||||
auto close_fn = [&] (Open_node &open_node) {
|
||||
|
||||
try { node = _handle_registry.lookup(handle); }
|
||||
catch (Invalid_handle) {
|
||||
Genode::error("close() called with invalid handle");
|
||||
return;
|
||||
}
|
||||
Node &node = open_node.node();
|
||||
|
||||
/**
|
||||
* Acknowledge the change of the content of files which may be
|
||||
* modified by the user of the file system.
|
||||
*/
|
||||
Changeable_content *changeable = dynamic_cast<Changeable_content*>(node);
|
||||
Changeable_content *changeable = dynamic_cast<Changeable_content*>(&node);
|
||||
if (changeable) {
|
||||
if (changeable->changed()) {
|
||||
changeable->acknowledge_change();
|
||||
|
||||
/* let the trace fs perform the provoked actions */
|
||||
_trace_fs->handle_changed_node(node);
|
||||
_trace_fs->handle_changed_node(&node);
|
||||
}
|
||||
}
|
||||
|
||||
_handle_registry.free(handle);
|
||||
/*
|
||||
* Notify listeners about the changed file.
|
||||
*/
|
||||
node.notify_listeners();
|
||||
|
||||
/*
|
||||
* De-allocate handle
|
||||
*/
|
||||
destroy(_md_alloc, &open_node);
|
||||
};
|
||||
|
||||
try {
|
||||
_open_node_registry.apply<Open_node>(handle, close_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
Status status(Node_handle node_handle)
|
||||
{
|
||||
Node *node = _handle_registry.lookup(node_handle);
|
||||
return node->status();
|
||||
auto status_fn = [&] (Open_node &open_node) {
|
||||
return open_node.node().status();
|
||||
};
|
||||
|
||||
try {
|
||||
return _open_node_registry.apply<Open_node>(node_handle, status_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
}
|
||||
|
||||
void control(Node_handle, Control) { }
|
||||
|
@ -900,22 +942,22 @@ class File_system::Session_component : public Session_rpc_object
|
|||
|
||||
void truncate(File_handle handle, file_size_t size)
|
||||
{
|
||||
Node *node;
|
||||
auto truncate_fn = [&] (Open_node &open_node) {
|
||||
open_node.node().truncate(size);
|
||||
};
|
||||
|
||||
try {
|
||||
node = _handle_registry.lookup(handle);
|
||||
|
||||
File *file = dynamic_cast<File*>(node);
|
||||
if (file) { file->truncate(size); }
|
||||
_open_node_registry.apply<Open_node>(handle, truncate_fn);
|
||||
} catch (Id_space<File_system::Node>::Unknown_id const &) {
|
||||
throw Invalid_handle();
|
||||
}
|
||||
catch (Invalid_handle) { }
|
||||
}
|
||||
|
||||
void move(Dir_handle, Name const &, Dir_handle, Name const &) { }
|
||||
};
|
||||
|
||||
|
||||
class File_system::Root : public Root_component<Session_component>
|
||||
class Trace_fs::Root : public Root_component<Session_component>
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -1055,7 +1097,7 @@ class File_system::Root : public Root_component<Session_component>
|
|||
};
|
||||
|
||||
|
||||
struct File_system::Main
|
||||
struct Trace_fs::Main
|
||||
{
|
||||
Env &_env;
|
||||
|
||||
|
@ -1074,4 +1116,4 @@ struct File_system::Main
|
|||
}
|
||||
};
|
||||
|
||||
void Component::construct(Genode::Env &env) { static File_system::Main main(env); }
|
||||
void Component::construct(Genode::Env &env) { static Trace_fs::Main main(env); }
|
||||
|
|
|
@ -4,6 +4,13 @@
|
|||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _NODE_H_
|
||||
#define _NODE_H_
|
||||
|
||||
|
@ -13,11 +20,13 @@
|
|||
#include <base/lock.h>
|
||||
#include <base/signal.h>
|
||||
|
||||
namespace File_system {
|
||||
|
||||
namespace Trace_fs {
|
||||
using namespace File_system;
|
||||
using namespace Genode;
|
||||
class Node;
|
||||
}
|
||||
|
||||
class Node : public Node_base, public List<Node>::Element
|
||||
class Trace_fs::Node : public Node_base, public List<Node>::Element
|
||||
{
|
||||
public:
|
||||
|
||||
|
@ -55,7 +64,23 @@ namespace File_system {
|
|||
|
||||
virtual size_t read(char *dst, size_t len, seek_off_t) = 0;
|
||||
virtual size_t write(char const *src, size_t len, seek_off_t) = 0;
|
||||
};
|
||||
|
||||
/*
|
||||
* Directory functionality
|
||||
*/
|
||||
virtual Node *lookup(char const *path, bool return_parent = false)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-directory node");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
/*
|
||||
* File functionality
|
||||
*/
|
||||
virtual void truncate(file_size_t size)
|
||||
{
|
||||
Genode::error(__PRETTY_FUNCTION__, " called on a non-file node");
|
||||
}
|
||||
};
|
||||
|
||||
#endif /* _NODE_H_ */
|
||||
|
|
|
@ -4,15 +4,24 @@
|
|||
* \date 2012-04-11
|
||||
*/
|
||||
|
||||
/*
|
||||
* Copyright (C) 2012-2017 Genode Labs GmbH
|
||||
*
|
||||
* This file is part of the Genode OS framework, which is distributed
|
||||
* under the terms of the GNU Affero General Public License version 3.
|
||||
*/
|
||||
|
||||
#ifndef _SYMLINK_H_
|
||||
#define _SYMLINK_H_
|
||||
|
||||
/* local includes */
|
||||
#include <file.h>
|
||||
|
||||
namespace File_system {
|
||||
namespace Trace_fs {
|
||||
class Symlink;
|
||||
}
|
||||
|
||||
class Symlink : public File
|
||||
class Trace_fs::Symlink : public File
|
||||
{
|
||||
public:
|
||||
|
||||
|
@ -28,6 +37,5 @@ namespace File_system {
|
|||
|
||||
void truncate(file_size_t) { }
|
||||
};
|
||||
}
|
||||
|
||||
#endif /* _SYMLINK_H_ */
|
||||
|
|
|
@ -21,7 +21,15 @@
|
|||
#include <file.h>
|
||||
|
||||
|
||||
namespace File_system {
|
||||
namespace Trace_fs {
|
||||
class State_file;
|
||||
class Active_file;
|
||||
class Cleanup_file;
|
||||
class Enable_file;
|
||||
class Events_file;
|
||||
class Buffer_size_file;
|
||||
class Policy_file;
|
||||
}
|
||||
|
||||
/**
|
||||
* The State_file is a stateful file that is used to implement
|
||||
|
@ -29,7 +37,7 @@ namespace File_system {
|
|||
* file system backend.
|
||||
*/
|
||||
|
||||
class State_file : public File,
|
||||
class Trace_fs::State_file : public File,
|
||||
public Changeable_content
|
||||
{
|
||||
protected:
|
||||
|
@ -122,7 +130,7 @@ namespace File_system {
|
|||
* The Active_file node shows the state of the tracing
|
||||
*/
|
||||
|
||||
class Active_file : public State_file
|
||||
class Trace_fs::Active_file : public State_file
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -149,7 +157,7 @@ namespace File_system {
|
|||
* the traced subject and to free utilized memory.
|
||||
*/
|
||||
|
||||
class Cleanup_file : public State_file
|
||||
class Trace_fs::Cleanup_file : public State_file
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -171,7 +179,7 @@ namespace File_system {
|
|||
* The Enable_file is used to initiate the tracing process
|
||||
*/
|
||||
|
||||
class Enable_file : public State_file
|
||||
class Trace_fs::Enable_file : public State_file
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -193,7 +201,7 @@ namespace File_system {
|
|||
* The Events_file encapsulates the trace buffer of traced thread
|
||||
*/
|
||||
|
||||
class Events_file : public Buffered_file
|
||||
class Trace_fs::Events_file : public Buffered_file
|
||||
{
|
||||
private:
|
||||
|
||||
|
@ -229,7 +237,7 @@ namespace File_system {
|
|||
* This file contains the size of the trace buffer
|
||||
*/
|
||||
|
||||
class Buffer_size_file : public File,
|
||||
class Trace_fs::Buffer_size_file : public File,
|
||||
public Changeable_content
|
||||
{
|
||||
private:
|
||||
|
@ -376,7 +384,7 @@ namespace File_system {
|
|||
* Policy file
|
||||
*/
|
||||
|
||||
class Policy_file : public Buffered_file,
|
||||
class Trace_fs::Policy_file : public Buffered_file,
|
||||
public Changeable_content
|
||||
{
|
||||
private:
|
||||
|
@ -427,6 +435,4 @@ namespace File_system {
|
|||
|
||||
};
|
||||
|
||||
}
|
||||
|
||||
#endif /* _TRACE_FILES_H_ */
|
||||
|
|
|
@ -94,16 +94,17 @@ class Vfs_server::Session_component : public File_system::Session_rpc_object,
|
|||
* \throw Invalid_handle
|
||||
*/
|
||||
template <typename HANDLE_TYPE, typename FUNC>
|
||||
void _apply(HANDLE_TYPE handle, FUNC const &fn)
|
||||
auto _apply(HANDLE_TYPE handle, FUNC const &fn)
|
||||
-> typename Genode::Trait::Functor<decltype(&FUNC::operator())>::Return_type
|
||||
{
|
||||
Node_space::Id id { handle.value };
|
||||
|
||||
try { _node_space.apply<Node>(id, [&] (Node &node) {
|
||||
try { return _node_space.apply<Node>(id, [&] (Node &node) {
|
||||
typedef typename Node_type<HANDLE_TYPE>::Type Typed_node;
|
||||
Typed_node *n = dynamic_cast<Typed_node *>(&node);
|
||||
if (!n)
|
||||
throw Invalid_handle();
|
||||
fn(*n);
|
||||
return fn(*n);
|
||||
}); } catch (Node_space::Unknown_id) { throw Invalid_handle(); }
|
||||
}
|
||||
|
||||
|
@ -385,7 +386,7 @@ class Vfs_server::Session_component : public File_system::Session_rpc_object,
|
|||
if (file.notify_read_ready() && file.read_ready()
|
||||
&& tx_sink()->ready_to_ack()) {
|
||||
Packet_descriptor packet(Packet_descriptor(),
|
||||
Node_handle(file.id().value),
|
||||
Node_handle { file.id().value },
|
||||
Packet_descriptor::READ_READY,
|
||||
0, 0);
|
||||
tx_sink()->acknowledge_packet(packet);
|
||||
|
@ -431,33 +432,29 @@ class Vfs_server::Session_component : public File_system::Session_rpc_object,
|
|||
if ((create || (fs_mode & WRITE_ONLY)) && (!_writable))
|
||||
throw Permission_denied();
|
||||
|
||||
File_handle new_handle;
|
||||
|
||||
_apply(dir_handle, [&] (Directory &dir) {
|
||||
return _apply(dir_handle, [&] (Directory &dir) {
|
||||
char const *name_str = name.string();
|
||||
_assert_valid_name(name_str);
|
||||
|
||||
new_handle = dir.file(
|
||||
_node_space, _vfs, _alloc, *this, name_str, fs_mode, create).value;
|
||||
return File_handle {
|
||||
dir.file(_node_space, _vfs, _alloc, *this, name_str, fs_mode, create).value
|
||||
};
|
||||
});
|
||||
return new_handle;
|
||||
}
|
||||
|
||||
Symlink_handle symlink(Dir_handle dir_handle, Name const &name, bool create) override
|
||||
{
|
||||
if (create && !_writable) throw Permission_denied();
|
||||
|
||||
Symlink_handle new_handle;
|
||||
|
||||
_apply(dir_handle, [&] (Directory &dir) {
|
||||
return _apply(dir_handle, [&] (Directory &dir) {
|
||||
char const *name_str = name.string();
|
||||
_assert_valid_name(name_str);
|
||||
|
||||
new_handle = dir.symlink(
|
||||
return Symlink_handle {dir.symlink(
|
||||
_node_space, _vfs, _alloc, name_str,
|
||||
_writable ? READ_WRITE : READ_ONLY, create).value;
|
||||
_writable ? READ_WRITE : READ_ONLY, create).value
|
||||
};
|
||||
});
|
||||
return new_handle;
|
||||
}
|
||||
|
||||
Node_handle node(File_system::Path const &path) override
|
||||
|
@ -465,7 +462,7 @@ class Vfs_server::Session_component : public File_system::Session_rpc_object,
|
|||
char const *path_str = path.string();
|
||||
/* '/' is bound to '0' */
|
||||
if (!strcmp(path_str, "/"))
|
||||
return Node_handle(0);
|
||||
return Node_handle { 0 };
|
||||
|
||||
_assert_valid_path(path_str);
|
||||
|
||||
|
@ -480,7 +477,7 @@ class Vfs_server::Session_component : public File_system::Session_rpc_object,
|
|||
try { node = new (_alloc) Node(_node_space, path_str, STAT_ONLY); }
|
||||
catch (Out_of_memory) { throw Out_of_ram(); }
|
||||
|
||||
return Node_handle(node->id().value);
|
||||
return Node_handle { node->id().value };
|
||||
}
|
||||
|
||||
void close(Node_handle handle) override
|
||||
|
|
Loading…
Reference in New Issue
Block a user