ExternalVendorCode/genode
1
0
Fork 0
mirror of https://github.com/genodelabs/genode.git synced 2025-02-20 17:52:52 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Move VFS from noux to 'os/include/vfs'

Browse Source 
By separating the VFS from Noux, we become able to reuse the
VFS for libc-using programs. The most substantial change is the
removal of Noux::Sysio data structures from the VFS. Instead, the
Noux::Sysio refers to the VFS types now.

The new VFS library is located at 'os/include/vfs/'.

Furthermore, the patch removes various code duplications related
to pseudo file systems that provide a single file (block, zero,
random, terminal, null). The new 'Single_file_system' holds the
common boilerplate code for those.

Issue #999
This commit is contained in:
Norman Feske 2014-04-07 16:15:40 +02:00 committed by Christian Helmuth
parent d7d62c53a6
commit c3c6a82d13
39 changed files with 3406 additions and 3990 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

328
os/include/vfs/block_file_system.h Normal file
View File

@ -0,0 +1,328 @@
/*
* \brief Block device file system
* \author Josef Soentgen
* \author Norman Feske
* \date 2013-12-20
*/
/*
* Copyright (C) 2013-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__BLOCK_FILE_SYSTEM_H_
#define _INCLUDE__VFS__BLOCK_FILE_SYSTEM_H_
#include <base/allocator_avl.h>
#include <block_session/connection.h>
#include <vfs/single_file_system.h>
namespace Vfs { class Block_file_system; }
class Vfs::Block_file_system : public Single_file_system
{
private:
struct Label
{
enum { LABEL_MAX_LEN = 64 };
char string[LABEL_MAX_LEN];
Label(Xml_node config)
{
string[0] = 0;
try { config.attribute("label").value(string, sizeof(string)); }
catch (...) { }
}
} _label;
/*
* Serialize access to packet stream of the block session
*/
Lock _lock;
char *_block_buffer;
unsigned _block_buffer_count;
Genode::Allocator_avl _tx_block_alloc;
Block::Connection _block;
size_t _block_size;
Block::sector_t _block_count;
Block::Session::Operations _block_ops;
Block::Session::Tx::Source *_tx_source;
bool _readable;
bool _writeable;
size_t _block_io(size_t nr, void *buf, size_t sz, bool write, bool bulk = false)
{
Lock::Guard guard(_lock);
Block::Packet_descriptor::Opcode op;
op = write ? Block::Packet_descriptor::WRITE : Block::Packet_descriptor::READ;
size_t packet_size = bulk ? sz : _block_size;
size_t packet_count = bulk ? (sz / _block_size) : 1;
/* sanity check */
if (packet_count > _block_buffer_count) {
packet_size = _block_buffer_count * _block_size;
packet_count = _block_buffer_count;
}
Block::Packet_descriptor p(_tx_source->alloc_packet(packet_size), op,
nr, packet_count);
if (write)
Genode::memcpy(_tx_source->packet_content(p), buf, packet_size);
_tx_source->submit_packet(p);
p = _tx_source->get_acked_packet();
if (!p.succeeded()) {
PERR("Could not read block(s)");
_tx_source->release_packet(p);
return 0;
}
if (!write)
Genode::memcpy(buf, _tx_source->packet_content(p), packet_size);
_tx_source->release_packet(p);
return packet_size;
}
public:
Block_file_system(Xml_node config)
:
Single_file_system(NODE_TYPE_BLOCK_DEVICE, name(), config),
_label(config),
_block_buffer(0),
_block_buffer_count(1),
_tx_block_alloc(env()->heap()),
_block(&_tx_block_alloc, 128*1024, _label.string),
_tx_source(_block.tx()),
_readable(false),
_writeable(false)
{
try { config.attribute("block_buffer_count").value(&_block_buffer_count); }
catch (...) { }
_block.info(&_block_count, &_block_size, &_block_ops);
_readable = _block_ops.supported(Block::Packet_descriptor::READ);
_writeable = _block_ops.supported(Block::Packet_descriptor::WRITE);
_block_buffer = new (env()->heap()) char[_block_buffer_count * _block_size];
}
~Block_file_system()
{
destroy(env()->heap(), _block_buffer);
}
static char const *name() { return "block"; }
/*********************************
** Directory service interface **
*********************************/
Stat_result stat(char const *path, Stat &out) override
{
Stat_result const result = Single_file_system::stat(path, out);
out.size = _block_size*_block_count;
return result;
}
/********************************
** File I/O service interface **
********************************/
Write_result write(Vfs_handle *vfs_handle, char const *buf, size_t count,
size_t &out_count) override
{
if (!_writeable) {
PERR("block device is not writeable");
return WRITE_ERR_INVALID;
}
size_t seek_offset = vfs_handle->seek();
size_t written = 0;
while (count > 0) {
size_t displ = 0;
size_t length = 0;
size_t nbytes = 0;
size_t blk_nr = seek_offset / _block_size;
displ = seek_offset % _block_size;
if ((displ + count) > _block_size)
length = (_block_size - displ);
else
length = count;
/*
* We take a shortcut and write as much as possible without
* using the block buffer if the offset is aligned on a block
* boundary and the count is a multiple of the block size,
* e.g. 4K writes will be written at once.
*
* XXX this is quite hackish because we have to omit partial
* blocks at the end.
*/
if (displ == 0 && (count % _block_size) >= 0 && !(count < _block_size)) {
size_t bytes_left = count - (count % _block_size);
nbytes = _block_io(blk_nr, (void*)(buf + written),
bytes_left, true, true);
if (nbytes == 0) {
PERR("error while write block:%zu from block device",
blk_nr);
return WRITE_ERR_INVALID;
}
written += nbytes;
count -= nbytes;
continue;
}
/*
* The offset is not aligned on a block boundary. Therefore
* we need to read the block to the block buffer first and
* put the buffer content at the right offset before we can
* write the whole block back. In addition if length is less
* than block size, we also have to read the block first.
*/
if (displ > 0 || length < _block_size) {
PWRN("offset:%zd block_size:%zd displacement:%zd length:%zu",
seek_offset, _block_size, displ, length);
_block_io(blk_nr, _block_buffer, _block_size, false);
/* rewind seek offset to account for the block read */
seek_offset -= _block_size;
}
Genode::memcpy(_block_buffer + displ, buf + written, length);
nbytes = _block_io(blk_nr, _block_buffer, _block_size, true);
if ((unsigned)nbytes != _block_size) {
PERR("error while writing block:%zu from Block_device",
blk_nr);
return WRITE_ERR_INVALID;
}
written += length;
count -= length;
}
out_count = written;
return WRITE_OK;
}
Read_result read(Vfs_handle *vfs_handle, char *dst, size_t count,
size_t &out_count) override
{
if (!_readable) {
PERR("block device is not readable");
return READ_ERR_INVALID;
}
size_t seek_offset = vfs_handle->seek();
size_t read = 0;
while (count > 0) {
size_t displ = 0;
size_t length = 0;
size_t nbytes = 0;
size_t blk_nr = seek_offset / _block_size;
displ = seek_offset % _block_size;
if ((displ + count) > _block_size)
length = (_block_size - displ);
else
length = count;
/*
* We take a shortcut and read the blocks all at once if t he
* offset is aligned on a block boundary and we the count is a
* multiple of the block size, e.g. 4K reads will be read at
* once.
*
* XXX this is quite hackish because we have to omit partial
* blocks at the end.
*/
if (displ == 0 && (count % _block_size) >= 0 && !(count < _block_size)) {
size_t bytes_left = count - (count % _block_size);
nbytes = _block_io(blk_nr, dst + read, bytes_left, false, true);
if (nbytes == 0) {
PERR("error while reading block:%zu from block device",
blk_nr);
return READ_ERR_INVALID;
}
read += nbytes;
count -= nbytes;
continue;
}
if (displ > 0)
PWRN("offset:%zd is not aligned to block_size:%zu"
" displacement:%zu", seek_offset, _block_size,
displ);
nbytes = _block_io(blk_nr, _block_buffer, _block_size, false);
if ((unsigned)nbytes != _block_size) {
PERR("error while reading block:%zu from block device",
blk_nr);
return READ_ERR_INVALID;
}
Genode::memcpy(dst + read, _block_buffer + displ, length);
read += length;
count -= length;
}
out_count = read;
return READ_OK;
}
Ftruncate_result ftruncate(Vfs_handle *vfs_handle, size_t) override
{
return FTRUNCATE_OK;
}
Ioctl_result ioctl(Vfs_handle *vfs_handle, Ioctl_opcode opcode, Ioctl_arg,
Ioctl_out &out) override
{
switch (opcode) {
case IOCTL_OP_DIOCGMEDIASIZE:
out.diocgmediasize.size = _block_count * _block_size;
return IOCTL_OK;
default:
PDBG("invalid ioctl request %d", opcode);
break;
}
/* never reached */
return IOCTL_ERR_INVALID;
}
};
#endif /* _INCLUDE__VFS__BLOCK_FILE_SYSTEM_H_ */

540
os/include/vfs/dir_file_system.h Normal file
View File

@ -0,0 +1,540 @@
/*
* \brief Directory file system
* \author Norman Feske
* \date 2012-04-23
*/
/*
* Copyright (C) 2011-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__DIR_FILE_SYSTEM_H_
#define _INCLUDE__VFS__DIR_FILE_SYSTEM_H_
#include <vfs/file_system_factory.h>
#include <vfs/vfs_handle.h>
namespace Vfs { class Dir_file_system; }
class Vfs::Dir_file_system : public File_system
{
public:
enum { MAX_NAME_LEN = 128 };
private:
/* pointer to first child file system */
File_system *_first_file_system;
/* add new file system to the list of children */
void _append_file_system(File_system *fs)
{
if (!_first_file_system) {
_first_file_system = fs;
return;
}
File_system *curr = _first_file_system;
while (curr->next)
curr = curr->next;
curr->next = fs;
}
/**
* Directory name
*/
char _name[MAX_NAME_LEN];
bool _is_root() const { return _name[0] == 0; }
/**
* Perform operation on a file system
*
* \param fn functor that takes a file-system reference and
* the path as arguments
*/
template <typename RES, typename FN>
RES _dir_op(RES const no_entry, RES const no_perm, RES const ok,
char const *path, FN const &fn)
{
path = _sub_path(path);
/* path does not match directory name */
if (!path)
return no_entry;
/*
* Prevent operation if path equals directory name defined
* via the static VFS configuration.
*/
if (strlen(path) == 0)
return no_perm;
/*
* If any of the sub file systems returns a permission error and
* there exists no sub file system that takes the request, we
* return the permission error.
*/
bool permission_denied = false;
/*
* The given path refers to at least one of our sub directories.
* Propagate the request into all of our file systems. If at least
* one operation succeeds, we return success.
*/
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
RES const err = fn(*fs, path);
if (err == ok)
return err;
/*
* Keep the most meaningful error code. When using stacked file
* systems, most child file systems will eventually return no
* entry (or leave the error code unchanged). If any of those
* file systems has anything more interesting to tell (in
* particular no perm), return this information.
*/
if (err != no_entry && err != no_perm)
return err;
if (err == no_perm)
permission_denied = true;
}
/* none of our file systems could successfully operate on the path */
return permission_denied ? no_perm : no_entry;
}
/**
* Return portion of the path after the element corresponding to
* the current directory.
*/
char const *_sub_path(char const *path) const
{
/* do not strip anything from the path when we are root */
if (_is_root())
return path;
/* skip heading slash in path if present */
if (path[0] == '/')
path++;
size_t const name_len = strlen(_name);
if (strcmp(path, _name, name_len) != 0)
return 0;
path += name_len;
/*
* The first characters of the first path element are equal to
* the current directory name. Let's check if the length of the
* first path element matches the name length.
*/
if (*path != 0 && *path != '/')
return 0;
return path;
}
/**
* The 'path' is relative to the child file systems.
*/
Dirent_result _dirent_of_file_systems(char const *path, off_t index, Dirent &out)
{
int base = 0;
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
/*
* Determine number of matching directory entries within
* the current file system.
*/
int const fs_num_dirent = fs->num_dirent(path);
/*
* Query directory entry if index lies with the file
* system.
*/
if (index - base < fs_num_dirent) {
index = index - base;
Dirent_result const err = fs->dirent(path, index, out);
out.fileno += base;
return err;
}
/* adjust base index for next file system */
base += fs_num_dirent;
}
out.type = DIRENT_TYPE_END;
return DIRENT_OK;
}
void _dirent_of_this_dir_node(off_t index, Dirent &out)
{
if (index == 0) {
strncpy(out.name, _name, sizeof(out.name));
out.type = DIRENT_TYPE_DIRECTORY;
out.fileno = 1;
} else {
out.type = DIRENT_TYPE_END;
}
}
/*
* Accumulate number of directory entries that match in any of
* our sub file systems.
*/
size_t _sum_dirents_of_file_systems(char const *path)
{
size_t cnt = 0;
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
cnt += fs->num_dirent(path);
}
return cnt;
}
public:
Dir_file_system(Xml_node node, File_system_factory &fs_factory)
:
_first_file_system(0)
{
/* remember directory name */
if (node.has_type("fstab") || node.has_type("vfs"))
_name[0] = 0;
else
node.attribute("name").value(_name, sizeof(_name));
for (unsigned i = 0; i < node.num_sub_nodes(); i++) {
Xml_node sub_node = node.sub_node(i);
/* traverse into <dir> nodes */
if (sub_node.has_type("dir")) {
_append_file_system(new (env()->heap())
Dir_file_system(sub_node, fs_factory));
continue;
}
File_system *fs = fs_factory.create(sub_node);
if (fs) {
_append_file_system(fs);
continue;
}
char type_name[64];
sub_node.type_name(type_name, sizeof(type_name));
PWRN("unknown fstab node type <%s>", type_name);
}
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path) override
{
path = _sub_path(path);
if (!path)
return Dataspace_capability();
/*
* Query sub file systems for dataspace using the path local to
* the respective file system
*/
File_system *fs = _first_file_system;
for (; fs; fs = fs->next) {
Dataspace_capability ds = fs->dataspace(path);
if (ds.valid())
return ds;
}
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap) override
{
path = _sub_path(path);
if (!path)
return;
for (File_system *fs = _first_file_system; fs; fs = fs->next)
fs->release(path, ds_cap);
}
Stat_result stat(char const *path, Stat &out) override
{
path = _sub_path(path);
/* path does not match directory name */
if (!path)
return STAT_ERR_NO_ENTRY;
/*
* If path equals directory name, return information about the
* current directory.
*/
if (strlen(path) == 0 || (strcmp(path, "/") == 0)) {
out.size = 0;
out.mode = STAT_MODE_DIRECTORY | 0755;
out.uid = 0;
out.gid = 0;
return STAT_OK;
}
/*
* The given path refers to one of our sub directories.
* Propagate the request into our file systems.
*/
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
Stat_result const err = fs->stat(path, out);
if (err == STAT_OK)
return err;
if (err != STAT_ERR_NO_ENTRY)
return err;
}
/* none of our file systems felt responsible for the path */
return STAT_ERR_NO_ENTRY;
}
Dirent_result dirent(char const *path, off_t index, Dirent &out) override
{
if (_is_root())
return _dirent_of_file_systems(path, index, out);
if (strcmp(path, "/") == 0) {
_dirent_of_this_dir_node(index, out);
return DIRENT_OK;
}
/* path contains at least one element */
/* remove current element from path */
path = _sub_path(path);
/* path does not lie within our tree */
if (!path)
return DIRENT_ERR_INVALID_PATH;
return _dirent_of_file_systems(path, index, out);
}
size_t num_dirent(char const *path) override
{
if (_is_root()) {
return _sum_dirents_of_file_systems(path);
} else {
if (strcmp(path, "/") == 0)
return 1;
/*
* The path contains at least one element. Remove current
* element from path.
*/
path = _sub_path(path);
/*
* If the resulting 'path' is non-NULL, the path lies
* within our tree. In this case, determine the sum of
* matching dirents of all our file systems. Otherwise,
* the specified path lies outside our directory node.
*/
return path ? _sum_dirents_of_file_systems(path) : 0;
}
}
bool is_directory(char const *path) override
{
path = _sub_path(path);
if (!path)
return false;
if (strlen(path) == 0)
return true;
for (File_system *fs = _first_file_system; fs; fs = fs->next)
if (fs->is_directory(path))
return true;
return false;
}
char const *leaf_path(char const *path) override
{
path = _sub_path(path);
if (!path)
return 0;
if (strlen(path) == 0)
return path;
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
char const *leaf_path = fs->leaf_path(path);
if (leaf_path)
return leaf_path;
}
return 0;
}
Open_result open(char const *path, unsigned mode, Vfs_handle **out_handle) override
{
/*
* If 'path' is a directory, we create a 'Vfs_handle'
* for the root directory so that subsequent 'dirent' calls
* are subjected to the stacked file-system layout.
*/
if (is_directory(path)) {
*out_handle = new (env()->heap()) Vfs_handle(*this, *this, 0);
return OPEN_OK;
}
/*
* If 'path' refers to a non-directory node, create a
* 'Vfs_handle' local to the file system that provides the
* file.
*/
path = _sub_path(path);
/* check if path does not match directory name */
if (!path)
return OPEN_ERR_UNACCESSIBLE;
/* path equals directory name */
if (strlen(path) == 0) {
*out_handle = new (env()->heap()) Vfs_handle(*this, *this, 0);
return OPEN_OK;
}
/* path refers to any of our sub file systems */
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
Open_result const err = fs->open(path, mode, out_handle);
if (err == OPEN_OK)
return err;
}
/* path does not match any existing file or directory */
return OPEN_ERR_UNACCESSIBLE;
}
Unlink_result unlink(char const *path) override
{
auto unlink_fn = [] (File_system &fs, char const *path)
{
return fs.unlink(path);
};
return _dir_op(UNLINK_ERR_NO_ENTRY, UNLINK_ERR_NO_PERM, UNLINK_OK,
path, unlink_fn);
}
Readlink_result readlink(char const *path, char *buf, size_t buf_size,
size_t &out_len) override
{
auto readlink_fn = [&] (File_system &fs, char const *path)
{
return fs.readlink(path, buf, buf_size, out_len);
};
return _dir_op(READLINK_ERR_NO_ENTRY, READLINK_ERR_NO_ENTRY, READLINK_OK,
path, readlink_fn);
}
Rename_result rename(char const *from_path, char const *to_path) override
{
/*
* Check if destination path resides within the same file
* system instance as the source path.
*/
to_path = _sub_path(to_path);
if (!to_path)
return RENAME_ERR_CROSS_FS;
auto rename_fn = [&] (File_system &fs, char const *from_path)
{
return fs.rename(from_path, to_path);
};
return _dir_op(RENAME_ERR_NO_ENTRY, RENAME_ERR_NO_PERM, RENAME_OK,
from_path, rename_fn);
}
Symlink_result symlink(char const *from, char const *to) override
{
auto symlink_fn = [&] (File_system &fs, char const *to)
{
return fs.symlink(from, to);
};
return _dir_op(SYMLINK_ERR_NO_ENTRY, SYMLINK_ERR_NO_PERM, SYMLINK_OK,
to, symlink_fn);
}
Mkdir_result mkdir(char const *path, unsigned mode) override
{
auto mkdir_fn = [&] (File_system &fs, char const *path)
{
return fs.mkdir(path, mode);
};
return _dir_op(MKDIR_ERR_NO_ENTRY, MKDIR_ERR_NO_PERM, MKDIR_OK,
path, mkdir_fn);
}
/***************************
** File_system interface **
***************************/
char const *name() const { return "dir"; }
/**
* Synchronize all file systems
*/
void sync() override
{
for (File_system *fs = _first_file_system; fs; fs = fs->next)
fs->sync();
}
/********************************
** File I/O service interface **
********************************/
Write_result write(Vfs_handle *handle, char const *, size_t, size_t &) override
{
return WRITE_ERR_INVALID;
}
Read_result read(Vfs_handle *, char *, size_t, size_t &) override
{
return READ_ERR_INVALID;
}
Ftruncate_result ftruncate(Vfs_handle *, size_t) override
{
return FTRUNCATE_ERR_NO_PERM;
}
};
#endif /* _INCLUDE__VFS__DIR_FILE_SYSTEM_H_ */

179
os/include/vfs/directory_service.h Normal file
View File

@ -0,0 +1,179 @@
/*
* \brief Directory-service interface
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__DIRECTORY_SERVICE_H_
#define _INCLUDE__VFS__DIRECTORY_SERVICE_H_
#include <vfs/types.h>
namespace Vfs {
class Vfs_handle;
struct Directory_service;
}
struct Vfs::Directory_service
{
virtual Dataspace_capability dataspace(char const *path) = 0;
virtual void release(char const *path, Dataspace_capability) = 0;
enum General_error { ERR_FD_INVALID, NUM_GENERAL_ERRORS };
/**********
** Open **
**********/
/**
* Flags of 'mode' argument of open syscall
*/
enum {
OPEN_MODE_RDONLY = 0,
OPEN_MODE_WRONLY = 1,
OPEN_MODE_RDWR = 2,
OPEN_MODE_ACCMODE = 3,
OPEN_MODE_CREATE = 0x0800, /* libc O_EXCL */
};
enum Open_result
{
OPEN_ERR_UNACCESSIBLE,
OPEN_ERR_NO_PERM,
OPEN_ERR_EXISTS,
OPEN_OK
};
virtual Open_result open(char const *path, unsigned mode, Vfs_handle **) = 0;
/**********
** Stat **
**********/
/**
* These values are the same as in the FreeBSD libc
*/
enum {
STAT_MODE_SYMLINK = 0120000,
STAT_MODE_FILE = 0100000,
STAT_MODE_DIRECTORY = 0040000,
STAT_MODE_CHARDEV = 0020000,
STAT_MODE_BLOCKDEV = 0060000,
};
struct Stat
{
size_t size;
unsigned mode;
unsigned uid;
unsigned gid;
unsigned long inode;
unsigned device;
};
enum Stat_result { STAT_ERR_NO_ENTRY = NUM_GENERAL_ERRORS, STAT_OK };
virtual Stat_result stat(char const *path, Stat &) = 0;
/************
** Dirent **
************/
enum Dirent_result { DIRENT_ERR_INVALID_PATH, DIRENT_OK };
enum { DIRENT_MAX_NAME_LEN = 128 };
enum Dirent_type {
DIRENT_TYPE_FILE,
DIRENT_TYPE_DIRECTORY,
DIRENT_TYPE_FIFO,
DIRENT_TYPE_CHARDEV,
DIRENT_TYPE_BLOCKDEV,
DIRENT_TYPE_SYMLINK,
DIRENT_TYPE_END
};
struct Dirent
{
int fileno;
Dirent_type type;
char name[DIRENT_MAX_NAME_LEN];
};
virtual Dirent_result dirent(char const *path, off_t index, Dirent &) = 0;
/************
** Unlink **
************/
enum Unlink_result { UNLINK_ERR_NO_ENTRY, UNLINK_ERR_NO_PERM, UNLINK_OK };
virtual Unlink_result unlink(char const *path) = 0;
/**************
** Readlink **
**************/
enum Readlink_result { READLINK_ERR_NO_ENTRY, READLINK_OK };
virtual Readlink_result readlink(char const *path, char *buf, size_t buf_size,
size_t &out_len) = 0;
/************
** Rename **
************/
enum Rename_result { RENAME_ERR_NO_ENTRY, RENAME_ERR_CROSS_FS,
RENAME_ERR_NO_PERM, RENAME_OK };
virtual Rename_result rename(char const *from, char const *to) = 0;
/***********
** Mkdir **
***********/
enum Mkdir_result { MKDIR_ERR_EXISTS, MKDIR_ERR_NO_ENTRY,
MKDIR_ERR_NO_SPACE, MKDIR_ERR_NO_PERM,
MKDIR_ERR_NAME_TOO_LONG, MKDIR_OK};
virtual Mkdir_result mkdir(char const *path, unsigned mode) = 0;
/*************
** Symlink **
*************/
enum Symlink_result { SYMLINK_ERR_EXISTS, SYMLINK_ERR_NO_ENTRY,
SYMLINK_ERR_NAME_TOO_LONG, SYMLINK_ERR_NO_PERM,
SYMLINK_OK };
virtual Symlink_result symlink(char const *from, char const *to) = 0;
/**
* Return number of directory entries located at given path
*/
virtual size_t num_dirent(char const *path) = 0;
virtual bool is_directory(char const *path) = 0;
virtual char const *leaf_path(char const *path) = 0;
};
#endif /* _INCLUDE__VFS__DIRECTORY_SERVICE_H_ */

123
os/include/vfs/file_io_service.h Normal file
View File

@ -0,0 +1,123 @@
/*
* \brief Interface for operations provided by file I/O service
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__FILE_IO_SERVICE_H_
#define _INCLUDE__VFS__FILE_IO_SERVICE_H_
namespace Vfs {
class Vfs_handle;
struct File_io_service;
}
struct Vfs::File_io_service
{
enum General_error { ERR_FD_INVALID, NUM_GENERAL_ERRORS };
/***********
** Write **
***********/
enum Write_result { WRITE_ERR_AGAIN, WRITE_ERR_WOULD_BLOCK,
WRITE_ERR_INVALID, WRITE_ERR_IO,
WRITE_ERR_INTERRUPT, WRITE_OK };
virtual Write_result write(Vfs_handle *vfs_handle,
char const *buf, size_t buf_size,
size_t &out_count) = 0;
/**********
** Read **
**********/
enum Read_result { READ_ERR_AGAIN, READ_ERR_WOULD_BLOCK,
READ_ERR_INVALID, READ_ERR_IO,
READ_ERR_INTERRUPT, READ_OK };
virtual Read_result read(Vfs_handle *vfs_handle, char *dst, size_t count,
size_t &out_count) = 0;
/***************
** Ftruncate **
***************/
enum Ftruncate_result { FTRUNCATE_ERR_NO_PERM = NUM_GENERAL_ERRORS,
FTRUNCATE_ERR_INTERRUPT, FTRUNCATE_OK };
virtual Ftruncate_result ftruncate(Vfs_handle *vfs_handle, size_t len) = 0;
/***********
** Ioctl **
***********/
enum Ioctl_result { IOCTL_ERR_INVALID, IOCTL_ERR_NOTTY, IOCTL_OK };
enum Ioctl_opcode { IOCTL_OP_UNDEFINED, IOCTL_OP_TIOCGWINSZ,
IOCTL_OP_TIOCSETAF, IOCTL_OP_TIOCSETAW,
IOCTL_OP_FIONBIO, IOCTL_OP_DIOCGMEDIASIZE };
enum Ioctl_value { IOCTL_VAL_NULL, IOCTL_VAL_ECHO, IOCTL_VAL_ECHONL };
typedef unsigned long Ioctl_arg;
struct Ioctl_out
{
union
{
/* if request was 'IOCTL_OP_TIOCGSIZE' */
struct {
int rows;
int columns;
} tiocgwinsz;
/* if request was 'IOCTL_OP_DIOCGMEDIASIZE' */
struct {
/* disk size rounded up to sector size in bytes*/
int size;
} diocgmediasize;
};
};
virtual Ioctl_result ioctl(Vfs_handle *vfs_handle, Ioctl_opcode, Ioctl_arg,
Ioctl_out &out)
{
/*
* This method is only needed in file systems which actually implement a
* device and is therefore false by default.
*/
return IOCTL_ERR_INVALID;
}
/**
* Return true if an unblocking condition of the file is satisfied
*
* \param rd if true, check for data available for reading
* \param wr if true, check for readiness for writing
* \param ex if true, check for exceptions
*/
virtual bool check_unblock(Vfs_handle *vfs_handle,
bool rd, bool wr, bool ex)
{ return true; }
virtual void register_read_ready_sigh(Vfs_handle *vfs_handle,
Signal_context_capability sigh)
{ }
};
#endif /* _INCLUDE__VFS__FILE_IO_SERVICE_H_ */

42
os/include/vfs/file_system.h Normal file
View File

@ -0,0 +1,42 @@
/*
* \brief VFS file-system back-end interface
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__FILE_SYSTEM_H_
#define _INCLUDE__VFS__FILE_SYSTEM_H_
#include <vfs/directory_service.h>
#include <vfs/file_io_service.h>
namespace Vfs { struct File_system; }
struct Vfs::File_system : Directory_service, File_io_service
{
/**
* Our next sibling within the same 'Dir_file_system'
*/
struct File_system *next;
File_system() : next(0) { }
/**
* Synchronize file system
*
* This function is only used by a Fs_file_system because such a file
* system may employ a backend, which maintains a internal cache, that
* needs to be flushed.
*/
virtual void sync() { }
};
#endif /* _INCLUDE__VFS__FILE_SYSTEM_H_ */

27
os/include/vfs/file_system_factory.h Normal file
View File

@ -0,0 +1,27 @@
/*
* \brief Interface for creating file-system instances
* \author Norman Feske
* \date 2014-04-07
*/
/*
* Copyright (C) 2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__FILE_SYSTEM_FACTORY_H_
#define _INCLUDE__VFS__FILE_SYSTEM_FACTORY_H_
#include <vfs/file_system.h>
namespace Vfs { class File_system_factory; }
struct Vfs::File_system_factory
{
virtual File_system *create(Xml_node node) = 0;
};
#endif /* _INCLUDE__VFS__FILE_SYSTEM_FACTORY_H_ */

628
os/include/vfs/fs_file_system.h Normal file
View File

@ -0,0 +1,628 @@
/*
* \brief Adapter from Genode 'File_system' session to VFS
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2012-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__FS_FILE_SYSTEM_H_
#define _INCLUDE__VFS__FS_FILE_SYSTEM_H_
/* Genode includes */
#include <base/allocator_avl.h>
#include <file_system_session/connection.h>
namespace Vfs { class Fs_file_system; }
class Vfs::Fs_file_system : public File_system
{
enum { verbose = false };
private:
/*
* Lock used to serialize the interaction with the packet stream of the
* file-system session.
*
* XXX Once, we change the VFS file-system interface to use
* asynchronous read/write operations, we can possibly remove it.
*/
Lock _lock;
Genode::Allocator_avl _fs_packet_alloc;
struct Label
{
enum { LABEL_MAX_LEN = 64 };
char string[LABEL_MAX_LEN];
Label(Xml_node config)
{
string[0] = 0;
try { config.attribute("label").value(string, sizeof(string)); }
catch (...) { }
}
} _label;
::File_system::Connection _fs;
class Fs_vfs_handle : public Vfs_handle
{
private:
::File_system::File_handle const _handle;
public:
Fs_vfs_handle(File_system &fs, int status_flags,
::File_system::File_handle handle)
: Vfs_handle(fs, fs, status_flags), _handle(handle)
{ }
~Fs_vfs_handle()
{
Fs_file_system &fs = static_cast<Fs_file_system &>(ds());
fs._fs.close(_handle);
}
::File_system::File_handle file_handle() const { return _handle; }
};
/**
* Helper for managing the lifetime of temporary open node handles
*/
struct Fs_handle_guard
{
::File_system::Session &_fs;
::File_system::Node_handle _handle;
Fs_handle_guard(::File_system::Session &fs,
::File_system::Node_handle handle)
: _fs(fs), _handle(handle) { }
~Fs_handle_guard() { _fs.close(_handle); }
};
size_t _read(::File_system::Node_handle node_handle, void *buf,
size_t const count, size_t const seek_offset)
{
::File_system::Session::Tx::Source &source = *_fs.tx();
size_t const max_packet_size = source.bulk_buffer_size() / 2;
size_t const clipped_count = min(max_packet_size, count);
::File_system::Packet_descriptor const
packet_in(source.alloc_packet(clipped_count),
0,
node_handle,
::File_system::Packet_descriptor::READ,
clipped_count,
seek_offset);
/* pass packet to server side */
source.submit_packet(packet_in);
/* obtain result packet descriptor with updated status info */
::File_system::Packet_descriptor const
packet_out = source.get_acked_packet();
size_t const read_num_bytes = min(packet_out.length(), count);
memcpy(buf, source.packet_content(packet_out), read_num_bytes);
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
source.release_packet(packet_out);
return read_num_bytes;
}
size_t _write(::File_system::Node_handle node_handle,
const char *buf, size_t count, size_t seek_offset)
{
::File_system::Session::Tx::Source &source = *_fs.tx();
size_t const max_packet_size = source.bulk_buffer_size() / 2;
count = min(max_packet_size, count);
::File_system::Packet_descriptor
packet(source.alloc_packet(count),
0,
node_handle,
::File_system::Packet_descriptor::WRITE,
count,
seek_offset);
memcpy(source.packet_content(packet), buf, count);
/* pass packet to server side */
source.submit_packet(packet);
source.get_acked_packet();
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
source.release_packet(packet);
return count;
}
public:
/*
* XXX read label from config
*/
Fs_file_system(Xml_node config)
:
_fs_packet_alloc(env()->heap()),
_label(config),
_fs(_fs_packet_alloc, 128*1024, _label.string)
{ }
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path) override
{
Lock::Guard guard(_lock);
Absolute_path dir_path(path);
dir_path.strip_last_element();
Absolute_path file_name(path);
file_name.keep_only_last_element();
Ram_dataspace_capability ds_cap;
char *local_addr = 0;
try {
::File_system::Dir_handle dir = _fs.dir(dir_path.base(),
false);
Fs_handle_guard dir_guard(_fs, dir);
::File_system::File_handle file =
_fs.file(dir, file_name.base() + 1,
::File_system::READ_ONLY, false);
Fs_handle_guard file_guard(_fs, file);
::File_system::Status status = _fs.status(file);
Ram_dataspace_capability ds_cap =
env()->ram_session()->alloc(status.size);
local_addr = env()->rm_session()->attach(ds_cap);
::File_system::Session::Tx::Source &source = *_fs.tx();
size_t const max_packet_size = source.bulk_buffer_size() / 2;
for (size_t seek_offset = 0; seek_offset < status.size;
seek_offset += max_packet_size) {
size_t const count = min(max_packet_size, status.size - seek_offset);
::File_system::Packet_descriptor
packet(source.alloc_packet(count),
0,
file,
::File_system::Packet_descriptor::READ,
count,
seek_offset);
/* pass packet to server side */
source.submit_packet(packet);
source.get_acked_packet();
memcpy(local_addr + seek_offset, source.packet_content(packet), count);
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
source.release_packet(packet);
}
env()->rm_session()->detach(local_addr);
return ds_cap;
} catch(...) {
env()->rm_session()->detach(local_addr);
env()->ram_session()->free(ds_cap);
return Dataspace_capability();
}
}
void release(char const *path, Dataspace_capability ds_cap) override
{
env()->ram_session()->free(static_cap_cast<Genode::Ram_dataspace>(ds_cap));
}
Stat_result stat(char const *path, Stat &out) override
{
::File_system::Status status;
try {
::File_system::Node_handle node = _fs.node(path);
Fs_handle_guard node_guard(_fs, node);
status = _fs.status(node);
} catch (...) {
if (verbose)
PDBG("stat failed for path '%s'", path);
return STAT_ERR_NO_ENTRY;
}
memset(&out, 0, sizeof(out));
out.size = status.size;
out.mode = STAT_MODE_FILE | 0777;
if (status.is_symlink())
out.mode = STAT_MODE_SYMLINK | 0777;
if (status.is_directory())
out.mode = STAT_MODE_DIRECTORY | 0777;
out.uid = 0;
out.gid = 0;
return STAT_OK;
}
Dirent_result dirent(char const *path, off_t index, Dirent &out) override
{
Lock::Guard guard(_lock);
::File_system::Session::Tx::Source &source = *_fs.tx();
if (strcmp(path, "") == 0)
path = "/";
::File_system::Dir_handle dir_handle = _fs.dir(path, false);
Fs_handle_guard dir_guard(_fs, dir_handle);
enum { DIRENT_SIZE = sizeof(::File_system::Directory_entry) };
::File_system::Packet_descriptor
packet(source.alloc_packet(DIRENT_SIZE),
0,
dir_handle,
::File_system::Packet_descriptor::READ,
DIRENT_SIZE,
index*DIRENT_SIZE);
/* pass packet to server side */
source.submit_packet(packet);
source.get_acked_packet();
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
typedef ::File_system::Directory_entry Directory_entry;
/* copy-out payload into destination buffer */
Directory_entry const *entry =
(Directory_entry *)source.packet_content(packet);
/*
* The default value has no meaning because the switch below
* assigns a value in each possible branch. But it is needed to
* keep the compiler happy.
*/
Dirent_type type = DIRENT_TYPE_END;
switch (entry->type) {
case Directory_entry::TYPE_DIRECTORY: type = DIRENT_TYPE_DIRECTORY; break;
case Directory_entry::TYPE_FILE: type = DIRENT_TYPE_FILE; break;
case Directory_entry::TYPE_SYMLINK: type = DIRENT_TYPE_SYMLINK; break;
}
out.type = type;
out.fileno = index + 1;
strncpy(out.name, entry->name, sizeof(out.name));
source.release_packet(packet);
return DIRENT_OK;
}
Unlink_result unlink(char const *path) override
{
Absolute_path dir_path(path);
dir_path.strip_last_element();
Absolute_path file_name(path);
file_name.keep_only_last_element();
try {
::File_system::Dir_handle dir = _fs.dir(dir_path.base(), false);
Fs_handle_guard dir_guard(_fs, dir);
_fs.unlink(dir, file_name.base() + 1);
}
catch (...) {
return UNLINK_ERR_NO_ENTRY;
}
return UNLINK_OK;
}
Readlink_result readlink(char const *path, char *buf, size_t buf_size,
size_t &out_len) override
{
/*
* Canonicalize path (i.e., path must start with '/')
*/
Absolute_path abs_path(path);
abs_path.strip_last_element();
Absolute_path symlink_name(path);
symlink_name.keep_only_last_element();
try {
::File_system::Dir_handle dir_handle = _fs.dir(abs_path.base(), false);
Fs_handle_guard from_dir_guard(_fs, dir_handle);
::File_system::Symlink_handle symlink_handle =
_fs.symlink(dir_handle, symlink_name.base() + 1, false);
Fs_handle_guard symlink_guard(_fs, symlink_handle);
out_len = _read(symlink_handle, buf, buf_size, 0);
return READLINK_OK;
} catch (...) { }
return READLINK_ERR_NO_ENTRY;
}
Rename_result rename(char const *from_path, char const *to_path) override
{
Absolute_path from_dir_path(from_path);
from_dir_path.strip_last_element();
Absolute_path from_file_name(from_path);
from_file_name.keep_only_last_element();
Absolute_path to_dir_path(to_path);
to_dir_path.strip_last_element();
Absolute_path to_file_name(to_path);
to_file_name.keep_only_last_element();
try {
::File_system::Dir_handle from_dir = _fs.dir(from_dir_path.base(), false);
Fs_handle_guard from_dir_guard(_fs, from_dir);
::File_system::Dir_handle to_dir = _fs.dir(to_dir_path.base(), false);
Fs_handle_guard to_dir_guard(_fs, to_dir);
_fs.move(from_dir, from_file_name.base() + 1,
to_dir, to_file_name.base() + 1);
} catch (...) {
return RENAME_ERR_NO_ENTRY; }
return RENAME_OK;
}
Mkdir_result mkdir(char const *path, unsigned mode) override
{
/*
* Canonicalize path (i.e., path must start with '/')
*/
Absolute_path abs_path(path);
try {
_fs.dir(abs_path.base(), true);
return MKDIR_OK;
}
catch (::File_system::Permission_denied) { return MKDIR_ERR_NO_PERM; }
catch (::File_system::Node_already_exists) { return MKDIR_ERR_EXISTS; }
catch (::File_system::Lookup_failed) { return MKDIR_ERR_NO_ENTRY; }
catch (::File_system::Name_too_long) { return MKDIR_ERR_NAME_TOO_LONG; }
catch (::File_system::No_space) { return MKDIR_ERR_NO_SPACE; }
return MKDIR_ERR_NO_PERM;
}
Symlink_result symlink(char const *from, char const *to) override
{
/*
* We write to the symlink via the packet stream. Hence we need
* to serialize with other packet-stream operations.
*/
Lock::Guard guard(_lock);
/*
* Canonicalize path (i.e., path must start with '/')
*/
Absolute_path abs_path(to);
abs_path.strip_last_element();
Absolute_path symlink_name(to);
symlink_name.keep_only_last_element();
try {
::File_system::Dir_handle dir_handle = _fs.dir(abs_path.base(), false);
Fs_handle_guard from_dir_guard(_fs, dir_handle);
::File_system::Symlink_handle symlink_handle =
_fs.symlink(dir_handle, symlink_name.base() + 1, true);
Fs_handle_guard symlink_guard(_fs, symlink_handle);
_write(symlink_handle, from, strlen(from) + 1, 0);
return SYMLINK_OK;
}
catch (::File_system::Invalid_handle) { return SYMLINK_ERR_NO_ENTRY; }
catch (::File_system::Node_already_exists) { return SYMLINK_ERR_EXISTS; }
catch (::File_system::Invalid_name) { return SYMLINK_ERR_NAME_TOO_LONG; }
catch (::File_system::Lookup_failed) { return SYMLINK_ERR_NO_ENTRY; }
catch (::File_system::Permission_denied) { return SYMLINK_ERR_NO_PERM; }
return SYMLINK_ERR_NO_ENTRY;
}
size_t num_dirent(char const *path) override
{
if (strcmp(path, "") == 0)
path = "/";
/*
* XXX handle exceptions
*/
::File_system::Node_handle node = _fs.node(path);
Fs_handle_guard node_guard(_fs, node);
::File_system::Status status = _fs.status(node);
return status.size / sizeof(::File_system::Directory_entry);
}
bool is_directory(char const *path) override
{
try {
::File_system::Node_handle node = _fs.node(path);
Fs_handle_guard node_guard(_fs, node);
::File_system::Status status = _fs.status(node);
return status.is_directory();
}
catch (...) { return false; }
}
char const *leaf_path(char const *path) override
{
/* check if node at path exists within file system */
try {
::File_system::Node_handle node = _fs.node(path);
_fs.close(node);
}
catch (...) {
return 0; }
return path;
}
Open_result open(char const *path, unsigned vfs_mode, Vfs_handle **out_handle) override
{
Lock::Guard guard(_lock);
Absolute_path dir_path(path);
dir_path.strip_last_element();
Absolute_path file_name(path);
file_name.keep_only_last_element();
::File_system::Mode mode;
switch (vfs_mode & OPEN_MODE_ACCMODE) {
default: mode = ::File_system::STAT_ONLY; break;
case OPEN_MODE_RDONLY: mode = ::File_system::READ_ONLY; break;
case OPEN_MODE_WRONLY: mode = ::File_system::WRITE_ONLY; break;
case OPEN_MODE_RDWR: mode = ::File_system::READ_WRITE; break;
}
bool const create = vfs_mode & OPEN_MODE_CREATE;
if (create)
if (verbose)
PDBG("creation of file %s requested", file_name.base() + 1);
try {
::File_system::Dir_handle dir = _fs.dir(dir_path.base(), false);
Fs_handle_guard dir_guard(_fs, dir);
::File_system::File_handle file = _fs.file(dir, file_name.base() + 1,
mode, create);
*out_handle = new (env()->heap()) Fs_vfs_handle(*this, vfs_mode, file);
return OPEN_OK;
}
catch (::File_system::Permission_denied) { return OPEN_ERR_NO_PERM; }
catch (::File_system::Invalid_handle) { return OPEN_ERR_NO_PERM; }
catch (::File_system::Lookup_failed) { return OPEN_ERR_UNACCESSIBLE; }
catch (::File_system::Node_already_exists) { return OPEN_ERR_EXISTS; }
return OPEN_ERR_UNACCESSIBLE;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "fs"; }
void sync() override
{
_fs.sync();
}
/********************************
** File I/O service interface **
********************************/
Write_result write(Vfs_handle *vfs_handle, char const *buf, size_t buf_size,
size_t &out_count) override
{
Lock::Guard guard(_lock);
Fs_vfs_handle const *handle = static_cast<Fs_vfs_handle *>(vfs_handle);
out_count = _write(handle->file_handle(), buf, buf_size, handle->seek());
return WRITE_OK;
}
Read_result read(Vfs_handle *vfs_handle, char *dst, size_t count,
size_t &out_count) override
{
Lock::Guard guard(_lock);
Fs_vfs_handle const *handle = static_cast<Fs_vfs_handle *>(vfs_handle);
::File_system::Status status = _fs.status(handle->file_handle());
size_t const file_size = status.size;
size_t const file_bytes_left = file_size >= handle->seek()
? file_size - handle->seek() : 0;
count = min(count, file_bytes_left);
out_count = _read(handle->file_handle(), dst, count, handle->seek());
return READ_OK;
}
Ftruncate_result ftruncate(Vfs_handle *vfs_handle, size_t len) override
{
Fs_vfs_handle const *handle = static_cast<Fs_vfs_handle *>(vfs_handle);
try {
_fs.truncate(handle->file_handle(), len);
}
catch (::File_system::Invalid_handle) { return FTRUNCATE_ERR_NO_PERM; }
catch (::File_system::Permission_denied) { return FTRUNCATE_ERR_NO_PERM; }
return FTRUNCATE_OK;
}
};
#endif /* _INCLUDE__VFS__FS_FILE_SYSTEM_H_ */

57
os/include/vfs/null_file_system.h Normal file
View File

@ -0,0 +1,57 @@
/*
* \brief null filesystem
* \author Josef Soentgen
* \author Norman Feske
* \date 2012-07-31
*/
/*
* Copyright (C) 2012-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__NULL_FILE_SYSTEM_H_
#define _INCLUDE__VFS__NULL_FILE_SYSTEM_H_
#include <vfs/single_file_system.h>
namespace Vfs { class Null_file_system; }
struct Vfs::Null_file_system : Single_file_system
{
Null_file_system(Xml_node config)
:
Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config)
{ }
static char const *name() { return "null"; }
/********************************
** File I/O service interface **
********************************/
Write_result write(Vfs_handle *handle, char const *, size_t count, size_t &out_count) override
{
out_count = count;
return WRITE_OK;
}
Read_result read(Vfs_handle *vfs_handle, char *, size_t, size_t &out_count) override
{
out_count = 0;
return READ_OK;
}
Ftruncate_result ftruncate(Vfs_handle *vfs_handle, size_t) override
{
return FTRUNCATE_OK;
}
};
#endif /* _INCLUDE__VFS__NULL_FILE_SYSTEM_H_ */

174
os/include/vfs/single_file_system.h Normal file
View File

@ -0,0 +1,174 @@
/*
* \brief File system that hosts a single node
* \author Norman Feske
* \date 2014-04-07
*/
/*
* Copyright (C) 2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__SINGLE_FILE_SYSTEM_H_
#define _INCLUDE__VFS__SINGLE_FILE_SYSTEM_H_
#include <vfs/file_system.h>
namespace Vfs { class Single_file_system; }
class Vfs::Single_file_system : public File_system
{
public:
enum Node_type { NODE_TYPE_FILE, NODE_TYPE_CHAR_DEVICE, NODE_TYPE_BLOCK_DEVICE };
private:
Node_type const _node_type;
enum { FILENAME_MAX_LEN = 64 };
char _filename[FILENAME_MAX_LEN];
bool _is_root(const char *path)
{
return (strcmp(path, "") == 0) || (strcmp(path, "/") == 0);
}
bool _is_single_file(const char *path)
{
return (strlen(path) == (strlen(_filename) + 1)) &&
(strcmp(&path[1], _filename) == 0);
}
public:
Single_file_system(Node_type node_type, char const *type_name, Xml_node config)
:
_node_type(node_type)
{
strncpy(_filename, type_name, sizeof(_filename));
try { config.attribute("name").value(_filename, sizeof(_filename)); }
catch (...) { }
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path) override
{
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap) override { }
Stat_result stat(char const *path, Stat &out) override
{
out = { 0, 0, 0, 0, 0, 0 };
if (_is_root(path)) {
out.mode = STAT_MODE_DIRECTORY;
} else if (_is_single_file(path)) {
switch (_node_type) {
case NODE_TYPE_FILE: out.mode = STAT_MODE_FILE; break;
case NODE_TYPE_CHAR_DEVICE: out.mode = STAT_MODE_CHARDEV; break;
case NODE_TYPE_BLOCK_DEVICE: out.mode = STAT_MODE_BLOCKDEV; break;
}
} else {
return STAT_ERR_NO_ENTRY;
}
return STAT_OK;
}
Dirent_result dirent(char const *path, off_t index, Dirent &out) override
{
if (!_is_root(path))
return DIRENT_ERR_INVALID_PATH;
if (index == 0) {
switch (_node_type) {
case NODE_TYPE_FILE: out.type = DIRENT_TYPE_FILE; break;
case NODE_TYPE_CHAR_DEVICE: out.type = DIRENT_TYPE_CHARDEV; break;
case NODE_TYPE_BLOCK_DEVICE: out.type = DIRENT_TYPE_BLOCKDEV; break;
}
strncpy(out.name, _filename, sizeof(out.name));
} else {
out.type = DIRENT_TYPE_END;
}
return DIRENT_OK;
}
size_t num_dirent(char const *path) override
{
if (_is_root(path))
return 1;
else
return 0;
}
bool is_directory(char const *path) override
{
if (_is_root(path))
return true;
return false;
}
char const *leaf_path(char const *path) override
{
return path;
}
Open_result open(char const *path, unsigned, Vfs_handle **out_handle) override
{
if (!_is_single_file(path))
return OPEN_ERR_UNACCESSIBLE;
*out_handle = new (env()->heap()) Vfs_handle(*this, *this, 0);
return OPEN_OK;
}
Unlink_result unlink(char const *) override
{
return UNLINK_ERR_NO_PERM;
}
Readlink_result readlink(char const *, char *, size_t, size_t &) override
{
return READLINK_ERR_NO_ENTRY;
}
Rename_result rename(char const *, char const *) override
{
return RENAME_ERR_NO_PERM;
}
Mkdir_result mkdir(char const *, unsigned) override
{
return MKDIR_ERR_NO_PERM;
}
Symlink_result symlink(char const *, char const *) override
{
return SYMLINK_ERR_NO_ENTRY;
}
/********************************
** File I/O service interface **
********************************/
Ftruncate_result ftruncate(Vfs_handle *vfs_handle, size_t) override
{
return FTRUNCATE_ERR_NO_PERM;
}
};
#endif /* _INCLUDE__VFS__SINGLE_FILE_SYSTEM_H_ */

638
os/include/vfs/tar_file_system.h Normal file
View File

@ -0,0 +1,638 @@
/*
* \brief TAR file system
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__TAR_FILE_SYSTEM_H_
#define _INCLUDE__VFS__TAR_FILE_SYSTEM_H_
#include <rom_session/connection.h>
#include <vfs/file_system.h>
#include <vfs/vfs_handle.h>
namespace Vfs { class Tar_file_system; }
class Vfs::Tar_file_system : public File_system
{
enum { verbose = false };
struct Rom_name
{
enum { ROM_NAME_MAX_LEN = 64 };
char name[ROM_NAME_MAX_LEN];
Rom_name(Xml_node config) {
config.attribute("name").value(name, sizeof(name));
}
} _rom_name;
Genode::Rom_connection _rom;
char *_tar_base;
size_t _tar_size;
class Record
{
private:
char _name[100];
char _mode[8];
char _uid[8];
char _gid[8];
char _size[12];
char _mtime[12];
char _checksum[8];
char _type[1];
char _linked_name[100];
/**
* Convert ASCII-encoded octal number to unsigned value
*/
template <typename T>
unsigned long _read(T const &field) const
{
/*
* Copy-out ASCII string to temporary buffer that is
* large enough to host an additional zero.
*/
char buf[sizeof(field) + 1];
strncpy(buf, field, sizeof(buf));
unsigned long value = 0;
ascii_to(buf, &value, 8);
return value;
}
public:
/* length of on data block in tar */
enum { BLOCK_LEN = 512 };
/* record type values */
enum { TYPE_FILE = 0, TYPE_HARDLINK = 1,
TYPE_SYMLINK = 2, TYPE_DIR = 5 };
size_t size() const { return _read(_size); }
unsigned uid() const { return _read(_uid); }
unsigned gid() const { return _read(_gid); }
unsigned mode() const { return _read(_mode); }
unsigned type() const { return _read(_type); }
char const *name() const { return _name; }
char const *linked_name() const { return _linked_name; }
void *data() const { return (char *)this + BLOCK_LEN; }
};
class Tar_vfs_handle : public Vfs_handle
{
private:
Record const *_record;
public:
Tar_vfs_handle(File_system &fs, int status_flags, Record const *record)
: Vfs_handle(fs, fs, status_flags), _record(record)
{ }
Record const *record() const { return _record; }
};
struct Scanner_policy_path_element
{
static bool identifier_char(char c, unsigned /* i */)
{
return (c != '/') && (c != 0);
}
};
typedef Genode::Token<Scanner_policy_path_element> Path_element_token;
struct Node : List<Node>, List<Node>::Element
{
char const *name;
Record const *record;
Node(char const *name, Record const *record) : name(name), record(record) { }
Node *lookup(char const *name)
{
Absolute_path lookup_path(name);
if (verbose)
PDBG("lookup_path = %s", lookup_path.base());
Node *parent_node = this;
Node *child_node;
Path_element_token t(lookup_path.base());
while (t) {
if (t.type() != Path_element_token::IDENT) {
t = t.next();
continue;
}
char path_element[MAX_PATH_LEN];
t.string(path_element, sizeof(path_element));
if (verbose)
PDBG("path_element = %s", path_element);
for (child_node = parent_node->first(); child_node; child_node = child_node->next()) {
if (verbose)
PDBG("comparing with node %s", child_node->name);
if (strcmp(child_node->name, path_element) == 0) {
if (verbose)
PDBG("found matching child node");
parent_node = child_node;
break;
}
}
if (!child_node)
return 0;
t = t.next();
}
return parent_node;
}
Node *lookup_child(int index)
{
for (Node *child_node = first(); child_node; child_node = child_node->next(), index--) {
if (index == 0)
return child_node;
}
return 0;
}
size_t num_dirent()
{
size_t count = 0;
for (Node *child_node = first(); child_node; child_node = child_node->next(), count++) ;
return count;
}
} _root_node;
/*
* Create a Node for a tar record and insert it into the node list
*/
class Add_node_action
{
private:
Node &_root_node;
public:
Add_node_action(Node &root_node) : _root_node(root_node) { }
void operator()(Record const *record)
{
Absolute_path current_path(record->name());
if (verbose)
PDBG("current_path = %s", current_path.base());
char path_element[MAX_PATH_LEN];
Path_element_token t(current_path.base());
Node *parent_node = &_root_node;
Node *child_node;
while(t) {
if (t.type() != Path_element_token::IDENT) {
t = t.next();
continue;
}
Absolute_path remaining_path(t.start());
t.string(path_element, sizeof(path_element));
for (child_node = parent_node->first(); child_node; child_node = child_node->next()) {
if (strcmp(child_node->name, path_element) == 0)
break;
}
if (child_node) {
if (verbose)
PDBG("found node for %s", path_element);
if (remaining_path.has_single_element()) {
/* Found a node for the record to be inserted.
* This is usually a directory node without
* record. */
child_node->record = record;
}
} else {
if (remaining_path.has_single_element()) {
if (verbose)
PDBG("creating node for %s", path_element);
/*
* TODO: find 'path_element' in 'record->name'
* and use the location in the record as name
* pointer to save some memory
*/
size_t name_size = strlen(path_element) + 1;
char *name = (char*)env()->heap()->alloc(name_size);
strncpy(name, path_element, name_size);
child_node = new (env()->heap()) Node(name, record);
} else {
if (verbose)
PDBG("creating node without record for %s", path_element);
/* create a directory node without record */
size_t name_size = strlen(path_element) + 1;
char *name = (char*)env()->heap()->alloc(name_size);
strncpy(name, path_element, name_size);
child_node = new (env()->heap()) Node(name, 0);
}
parent_node->insert(child_node);
}
parent_node = child_node;
t = t.next();
}
}
};
template <typename Tar_record_action>
void _for_each_tar_record_do(Tar_record_action tar_record_action)
{
/* measure size of archive in blocks */
unsigned block_id = 0, block_cnt = _tar_size/Record::BLOCK_LEN;
/* scan metablocks of archive */
while (block_id < block_cnt) {
Record *record = (Record *)(_tar_base + block_id*Record::BLOCK_LEN);
tar_record_action(record);
size_t file_size = record->size();
/* some datablocks */ /* one metablock */
block_id = block_id + (file_size / Record::BLOCK_LEN) + 1;
/* round up */
if (file_size % Record::BLOCK_LEN != 0) block_id++;
/* check for end of tar archive */
if (block_id*Record::BLOCK_LEN >= _tar_size)
break;
/* lookout for empty eof-blocks */
if (*(_tar_base + (block_id*Record::BLOCK_LEN)) == 0x00)
if (*(_tar_base + (block_id*Record::BLOCK_LEN + 1)) == 0x00)
break;
}
}
struct Num_dirent_cache
{
Lock lock;
Node &root_node;
bool valid; /* true after first lookup */
char key[256]; /* key used for lookup */
size_t cached_num_dirent; /* cached value */
Num_dirent_cache(Node &root_node)
: root_node(root_node), valid(false), cached_num_dirent(0) { }
size_t num_dirent(char const *path)
{
Lock::Guard guard(lock);
/* check for cache miss */
if (!valid || strcmp(path, key) != 0) {
Node *node = root_node.lookup(path);
if (!node)
return 0;
strncpy(key, path, sizeof(key));
cached_num_dirent = node->num_dirent();
valid = true;
}
return cached_num_dirent;
}
} _cached_num_dirent;
public:
Tar_file_system(Xml_node config)
:
_rom_name(config), _rom(_rom_name.name),
_tar_base(env()->rm_session()->attach(_rom.dataspace())),
_tar_size(Dataspace_client(_rom.dataspace()).size()),
_root_node("", 0),
_cached_num_dirent(_root_node)
{
PINF("tar archive '%s' local at %p, size is %zd",
_rom_name.name, _tar_base, _tar_size);
_for_each_tar_record_do(Add_node_action(_root_node));
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path) override
{
/*
* Walk hardlinks until we reach a file
*/
Record const *record = 0;
for (;;) {
Node *node = _root_node.lookup(path);
if (!node)
return Dataspace_capability();
record = node->record;
if (record) {
if (record->type() == Record::TYPE_HARDLINK) {
path = record->linked_name();
continue;
}
if (record->type() == Record::TYPE_FILE)
break;
PERR("TAR record \"%s\" has unsupported type %d",
record->name(), record->type());
}
PERR("TAR record \"%s\" has unsupported type %d",
path, Record::TYPE_DIR);
return Dataspace_capability();
}
try {
Ram_dataspace_capability ds_cap =
env()->ram_session()->alloc(record->size());
void *local_addr = env()->rm_session()->attach(ds_cap);
memcpy(local_addr, record->data(), record->size());
env()->rm_session()->detach(local_addr);
return ds_cap;
}
catch (...) { PDBG("Could not create new dataspace"); }
return Dataspace_capability();
}
void release(char const *, Dataspace_capability ds_cap) override
{
env()->ram_session()->free(static_cap_cast<Genode::Ram_dataspace>(ds_cap));
}
Stat_result stat(char const *path, Stat &out) override
{
if (verbose)
PDBG("path = %s", path);
Node const *node = 0;
Record const *record = 0;
/*
* Walk hardlinks until we reach a file
*/
for (;;) {
node = _root_node.lookup(path);
if (!node)
return STAT_ERR_NO_ENTRY;
record = node->record;
if (record) {
if (record->type() == Record::TYPE_HARDLINK) {
path = record->linked_name();
continue;
} else
break;
} else {
if (verbose)
PDBG("found a virtual directoty node");
memset(&out, 0, sizeof(out));
out.mode = STAT_MODE_DIRECTORY;
return STAT_OK;
}
}
/* convert TAR record modes to stat modes */
unsigned mode = record->mode();
switch (record->type()) {
case Record::TYPE_FILE: mode |= STAT_MODE_FILE; break;
case Record::TYPE_SYMLINK: mode |= STAT_MODE_SYMLINK; break;
case Record::TYPE_DIR: mode |= STAT_MODE_DIRECTORY; break;
default:
if (verbose)
PDBG("unhandled record type %d", record->type());
}
memset(&out, 0, sizeof(out));
out.mode = mode;
out.size = record->size();
out.uid = record->uid();
out.gid = record->gid();
out.inode = (unsigned long)node;
return STAT_OK;
}
Dirent_result dirent(char const *path, off_t index, Dirent &out) override
{
Node *node = _root_node.lookup(path);
if (!node)
return DIRENT_ERR_INVALID_PATH;
node = node->lookup_child(index);
if (!node) {
out.type = DIRENT_TYPE_END;
return DIRENT_OK;
}
out.fileno = (unsigned long)node;
Record const *record = node->record;
if (record) {
switch (record->type()) {
case 0: out.type = DIRENT_TYPE_FILE; break;
case 2: out.type = DIRENT_TYPE_SYMLINK; break;
case 5: out.type = DIRENT_TYPE_DIRECTORY; break;
default:
if (verbose)
PDBG("unhandled record type %d", record->type());
}
}
strncpy(out.name, node->name, sizeof(out.name));
return DIRENT_OK;
}
Unlink_result unlink(char const *) override { return UNLINK_ERR_NO_PERM; }
Readlink_result readlink(char const *path, char *buf, size_t buf_size,
size_t &out_len) override
{
Node *node = _root_node.lookup(path);
Record const *record = node ? node->record : 0;
if (!record || (record->type() != Record::TYPE_SYMLINK))
return READLINK_ERR_NO_ENTRY;
size_t const count = min(buf_size, (size_t)100);
memcpy(buf, record->linked_name(), count);
out_len = count;
return READLINK_OK;
}
Rename_result rename(char const *, char const *) override
{
return RENAME_ERR_NO_PERM;
}
Mkdir_result mkdir(char const *, unsigned) override
{
return MKDIR_ERR_NO_PERM;
}
Symlink_result symlink(char const *, char const *) override
{
return SYMLINK_ERR_NO_ENTRY;
}
size_t num_dirent(char const *path) override
{
return _cached_num_dirent.num_dirent(path);
}
bool is_directory(char const *path) override
{
Node *node = _root_node.lookup(path);
if (!node)
return false;
Record const *record = node->record;
return record ? (record->type() == Record::TYPE_DIR) : true;
}
char const *leaf_path(char const *path) override
{
/*
* Check if path exists within the file system. If this is the
* case, return the whole path, which is relative to the root
* of this file system.
*/
Node *node = _root_node.lookup(path);
return node ? path : 0;
}
Open_result open(char const *path, unsigned, Vfs_handle **out_handle) override
{
Node *node = _root_node.lookup(path);
if (!node)
return OPEN_ERR_UNACCESSIBLE;
*out_handle = new (env()->heap())
Tar_vfs_handle(*this, 0, node->record);
return OPEN_OK;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "tar"; }
/********************************
** File I/O service interface **
********************************/
Write_result write(Vfs_handle *, char const *, size_t, size_t &) override
{
PDBG("called\n");
return WRITE_ERR_INVALID;
}
Read_result read(Vfs_handle *vfs_handle, char *dst, size_t count,
size_t &out_count) override
{
Tar_vfs_handle const *handle = static_cast<Tar_vfs_handle *>(vfs_handle);
size_t const record_size = handle->record()->size();
size_t const record_bytes_left = record_size >= handle->seek()
? record_size - handle->seek() : 0;
count = min(record_bytes_left, count);
char const *data = (char *)handle->record()->data() + handle->seek();
memcpy(dst, data, count);
out_count = count;
return READ_OK;
}
Ftruncate_result ftruncate(Vfs_handle *handle, size_t) override
{
PDBG("called\n");
return FTRUNCATE_ERR_NO_PERM;
}
};
#endif /* _INCLUDE__VFS__TAR_FILE_SYSTEM_H_ */

105
os/include/vfs/terminal_file_system.h Normal file
View File

@ -0,0 +1,105 @@
/*
* \brief Terminal file system
* \author Christian Prochaska
* \author Norman Feske
* \date 2012-05-23
*/
/*
* Copyright (C) 2012-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__TERMINAL_FILE_SYSTEM_H_
#define _INCLUDE__VFS__TERMINAL_FILE_SYSTEM_H_
#include <terminal_session/connection.h>
#include <vfs/single_file_system.h>
namespace Vfs { class Terminal_file_system; }
class Vfs::Terminal_file_system : public Single_file_system
{
private:
struct Label
{
enum { LABEL_MAX_LEN = 64 };
char string[LABEL_MAX_LEN];
Label(Xml_node config)
{
string[0] = 0;
try { config.attribute("label").value(string, sizeof(string)); }
catch (...) { }
}
} _label;
Terminal::Connection _terminal;
public:
Terminal_file_system(Xml_node config)
:
Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config),
_label(config),
_terminal(_label.string)
{
/*
* Wait for connection-established signal
*/
/* create signal receiver, just for the single signal */
Genode::Signal_context sig_ctx;
Genode::Signal_receiver sig_rec;
Signal_context_capability sig_cap = sig_rec.manage(&sig_ctx);
/* register signal handler */
_terminal.connected_sigh(sig_cap);
/* wati for signal */
sig_rec.wait_for_signal();
sig_rec.dissolve(&sig_ctx);
}
static const char *name() { return "terminal"; }
/********************************
** File I/O service interface **
********************************/
Write_result write(Vfs_handle *, char const *buf, size_t buf_size, size_t &out_count) override
{
out_count = _terminal.write(buf, buf_size);
return WRITE_OK;
}
Read_result read(Vfs_handle *, char *dst, size_t count, size_t &out_count) override
{
out_count = _terminal.read(dst, count);
return READ_OK;
}
bool check_unblock(Vfs_handle *vfs_handle, bool rd, bool wr, bool ex) override
{
if (rd && (_terminal.avail() > 0))
return true;
if (wr)
return true;
return false;
}
void register_read_ready_sigh(Vfs_handle *vfs_handle,
Signal_context_capability sigh) override
{
_terminal.read_avail_sigh(sigh);
}
};
#endif /* _INCLUDE__VFS__TERMINAL_FILE_SYSTEM_H_ */

54
os/include/vfs/types.h Normal file
View File

@ -0,0 +1,54 @@
/*
* \brief Types used by VFS
* \author Norman Feske
* \date 2014-04-07
*/
/*
* Copyright (C) 2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__TYPES_H_
#define _INCLUDE__VFS__TYPES_H_
#include <util/list.h>
#include <util/misc_math.h>
#include <util/xml_node.h>
#include <util/string.h>
#include <base/lock.h>
#include <base/env.h>
#include <base/signal.h>
#include <base/printf.h>
#include <dataspace/client.h>
#include <os/path.h>
namespace Vfs {
enum { MAX_PATH_LEN = 512 };
using Genode::Ram_dataspace_capability;
using Genode::Dataspace_capability;
using Genode::Dataspace_client;
using Genode::env;
using Genode::min;
using Genode::ascii_to;
using Genode::strncpy;
using Genode::strcmp;
using Genode::strlen;
using Genode::off_t;
using Genode::memcpy;
using Genode::memset;
using Genode::size_t;
using Genode::Lock;
using Genode::List;
using Genode::Xml_node;
using Genode::Signal_context_capability;
using Genode::static_cap_cast;
typedef Genode::Path<MAX_PATH_LEN> Absolute_path;
}
#endif /* _INCLUDE__VFS__TYPES_H_ */

64
os/include/vfs/vfs_handle.h Normal file
View File

@ -0,0 +1,64 @@
/*
* \brief Representation of an open file
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__VFS_HANDLE_H_
#define _INCLUDE__VFS__VFS_HANDLE_H_
#include <vfs/file_io_service.h>
#include <vfs/directory_service.h>
namespace Vfs { class Vfs_handle; }
class Vfs::Vfs_handle
{
private:
Directory_service &_ds;
File_io_service &_fs;
int _status_flags;
size_t _seek;
public:
enum { STATUS_RDONLY = 0, STATUS_WRONLY = 1, STATUS_RDWR = 2 };
Vfs_handle(Directory_service &ds, File_io_service &fs, int status_flags)
:
_ds(ds), _fs(fs), _status_flags(status_flags), _seek(0)
{ }
virtual ~Vfs_handle() { }
Directory_service &ds() { return _ds; }
File_io_service &fs() { return _fs; }
int status_flags() const { return _status_flags; }
/**
* Return seek offset in bytes
*/
size_t seek() const { return _seek; }
/**
* Set seek offset in bytes
*/
void seek(off_t seek) { _seek = seek; }
/**
* Advance seek offset by 'incr' bytes
*/
void advance_seek(size_t incr) { _seek += incr; }
};
#endif /* _INCLUDE__VFS__VFS_HANDLE_H_ */

53
os/include/vfs/zero_file_system.h Normal file
View File

@ -0,0 +1,53 @@
/*
* \brief zero filesystem
* \author Josef Soentgen
* \author Norman Feske
* \date 2012-07-31
*/
/*
* Copyright (C) 2012-2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__VFS__ZERO_FILE_SYSTEM_H_
#define _INCLUDE__VFS__ZERO_FILE_SYSTEM_H_
#include <vfs/file_system.h>
namespace Vfs { class Zero_file_system; }
struct Vfs::Zero_file_system : Single_file_system
{
Zero_file_system(Xml_node config)
:
Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config)
{ }
static char const *name() { return "zero"; }
/********************************
** File I/O service interface **
********************************/
Write_result write(Vfs_handle *, char const *, size_t count, size_t &count_out) override
{
count_out = count;
return WRITE_OK;
}
Read_result read(Vfs_handle *vfs_handle, char *dst, size_t count, size_t &out_count) override
{
memset(dst, 0, count);
out_count = count;
return READ_OK;
}
};
#endif /* _INCLUDE__VFS__ZERO_FILE_SYSTEM_H_ */

142
ports/include/noux_session/sysio.h
View File

@ -21,6 +21,7 @@
/* Genode includes */
#include <os/ring_buffer.h>
#include <util/misc_math.h>
#include <vfs/file_system.h>
#define SYSIO_DECL(syscall_name, args, results) \
@ -81,25 +82,16 @@ namespace Noux {
STAT_MODE_BLOCKDEV = 0060000,
};
struct Stat
{
size_t size;
unsigned mode;
unsigned uid;
unsigned gid;
unsigned long inode;
unsigned device;
};
typedef Vfs::Directory_service::Stat Stat;
/**
* Argument structure used for ioctl syscall
*/
struct Ioctl_in
{
enum Opcode { OP_UNDEFINED, OP_TIOCGWINSZ, OP_TIOCSETAF,
OP_TIOCSETAW, OP_FIONBIO, OP_DIOCGMEDIASIZE };
typedef Vfs::File_io_service::Ioctl_opcode Opcode;
enum Val { VAL_NULL, VAL_ECHO, VAL_ECHONL };
typedef Vfs::File_io_service::Ioctl_value Value;
Opcode request;
int argp;
@ -108,45 +100,14 @@ namespace Noux {
/**
* Structure carrying the result values of 'ioctl' syscalls
*/
struct Ioctl_out
{
union
{
/* if request was 'OP_TIOCGSIZE' */
struct {
int rows;
int columns;
} tiocgwinsz;
/* if request was 'OP_DIOCGMEDIASIZE' */
struct {
/* disk size rounded up to sector size in bytes*/
int size;
} diocgmediasize;
};
};
typedef Vfs::File_io_service::Ioctl_out Ioctl_out;
enum Lseek_whence { LSEEK_SET, LSEEK_CUR, LSEEK_END };
enum { DIRENT_MAX_NAME_LEN = 128 };
enum { DIRENT_MAX_NAME_LEN = Vfs::Directory_service::DIRENT_MAX_NAME_LEN };
enum Dirent_type {
DIRENT_TYPE_FILE,
DIRENT_TYPE_DIRECTORY,
DIRENT_TYPE_FIFO,
DIRENT_TYPE_CHARDEV,
DIRENT_TYPE_BLOCKDEV,
DIRENT_TYPE_SYMLINK,
DIRENT_TYPE_END
};
struct Dirent
{
int fileno;
Dirent_type type;
char name[DIRENT_MAX_NAME_LEN];
};
typedef Vfs::Directory_service::Dirent_type Dirent_type;
typedef Vfs::Directory_service::Dirent Dirent;
enum Fcntl_cmd {
FCNTL_CMD_GET_FILE_STATUS_FLAGS,
@ -304,34 +265,9 @@ namespace Noux {
*/
enum Clock_Id { CLOCK_ID_SECOND };
enum General_error { ERR_FD_INVALID, NUM_GENERAL_ERRORS };
enum Stat_error { STAT_ERR_NO_ENTRY = NUM_GENERAL_ERRORS };
enum Fcntl_error { FCNTL_ERR_CMD_INVALID = NUM_GENERAL_ERRORS };
enum Ftruncate_error { FTRUNCATE_ERR_NO_PERM = NUM_GENERAL_ERRORS,
FTRUNCATE_ERR_INTERRUPT };
enum Open_error { OPEN_ERR_UNACCESSIBLE, OPEN_ERR_NO_PERM,
OPEN_ERR_EXISTS };
enum Execve_error { EXECVE_NONEXISTENT = NUM_GENERAL_ERRORS };
enum Fcntl_error { FCNTL_ERR_CMD_INVALID = Vfs::Directory_service::NUM_GENERAL_ERRORS };
enum Execve_error { EXECVE_NONEXISTENT = Vfs::Directory_service::NUM_GENERAL_ERRORS };
enum Select_error { SELECT_ERR_INTERRUPT };
enum Unlink_error { UNLINK_ERR_NO_ENTRY, UNLINK_ERR_NO_PERM };
enum Readlink_error { READLINK_ERR_NO_ENTRY };
enum Rename_error { RENAME_ERR_NO_ENTRY, RENAME_ERR_CROSS_FS,
RENAME_ERR_NO_PERM };
enum Mkdir_error { MKDIR_ERR_EXISTS, MKDIR_ERR_NO_ENTRY,
MKDIR_ERR_NO_SPACE, MKDIR_ERR_NO_PERM,
MKDIR_ERR_NAME_TOO_LONG};
enum Symlink_error { SYMLINK_ERR_EXISTS, SYMLINK_ERR_NO_ENTRY,
SYMLINK_ERR_NAME_TOO_LONG};
enum Read_error { READ_ERR_AGAIN, READ_ERR_WOULD_BLOCK,
READ_ERR_INVALID, READ_ERR_IO,
READ_ERR_INTERRUPT };
enum Write_error { WRITE_ERR_AGAIN, WRITE_ERR_WOULD_BLOCK,
WRITE_ERR_INVALID, WRITE_ERR_IO,
WRITE_ERR_INTERRUPT };
enum Ioctl_error { IOCTL_ERR_INVALID, IOCTL_ERR_NOTTY };
/**
* Socket related errors
@ -375,33 +311,35 @@ namespace Noux {
enum Kill_error { KILL_ERR_SRCH };
union {
General_error general;
Stat_error stat;
Fcntl_error fcntl;
Ftruncate_error ftruncate;
Open_error open;
Execve_error execve;
Select_error select;
Unlink_error unlink;
Readlink_error readlink;
Rename_error rename;
Mkdir_error mkdir;
Symlink_error symlink;
Read_error read;
Write_error write;
Ioctl_error ioctl;
Accept_error accept;
Bind_error bind;
Connect_error connect;
Listen_error listen;
Recv_error recv;
Send_error send;
Shutdown_error shutdown;
Socket_error socket;
Clock_error clock;
Utimes_error utimes;
Wait4_error wait4;
Kill_error kill;
Vfs::Directory_service::General_error general;
Vfs::Directory_service::Stat_result stat;
Vfs::File_io_service::Ftruncate_result ftruncate;
Vfs::Directory_service::Open_result open;
Vfs::Directory_service::Unlink_result unlink;
Vfs::Directory_service::Readlink_result readlink;
Vfs::Directory_service::Rename_result rename;
Vfs::Directory_service::Mkdir_result mkdir;
Vfs::Directory_service::Symlink_result symlink;
Vfs::File_io_service::Read_result read;
Vfs::File_io_service::Write_result write;
Vfs::File_io_service::Ioctl_result ioctl;
Fcntl_error fcntl;
Execve_error execve;
Select_error select;
Accept_error accept;
Bind_error bind;
Connect_error connect;
Listen_error listen;
Recv_error recv;
Send_error send;
Shutdown_error shutdown;
Socket_error socket;
Clock_error clock;
Utimes_error utimes;
Wait4_error wait4;
Kill_error kill;
} error;
union {
@ -435,7 +373,7 @@ namespace Noux {
{ Chunk chunk; size_t count; });
SYSIO_DECL(readlink, { Path path; size_t bufsiz; },
{ Chunk chunk; ssize_t count; });
{ Chunk chunk; size_t count; });
SYSIO_DECL(execve, { Path filename; Args args; Env env; }, { });

126
ports/src/lib/libc_noux/plugin.cc
View File

@ -962,7 +962,8 @@ namespace {
if (verbose)
PWRN("stat syscall failed for path \"%s\"", path);
switch (sysio()->error.stat) {
case Noux::Sysio::STAT_ERR_NO_ENTRY: errno = ENOENT; break;
case Vfs::Directory_service::STAT_OK: /* never reached */
case Vfs::Directory_service::STAT_ERR_NO_ENTRY: errno = ENOENT; break;
}
return -1;
}
@ -988,7 +989,7 @@ namespace {
opened = true;
else
switch (sysio()->error.open) {
case Noux::Sysio::OPEN_ERR_UNACCESSIBLE:
case Vfs::Directory_service::OPEN_ERR_UNACCESSIBLE:
if (!(flags & O_CREAT)) {
errno = ENOENT;
return 0;
@ -1000,16 +1001,18 @@ namespace {
opened = true;
else
switch (sysio()->error.open) {
case Noux::Sysio::OPEN_ERR_EXISTS:
/* file has been created by someone else in the meantime */
break;
case Noux::Sysio::OPEN_ERR_NO_PERM: errno = EPERM; return 0;
default: errno = ENOENT; return 0;
case Vfs::Directory_service::OPEN_ERR_EXISTS:
/* file has been created by someone else in the meantime */
break;
case Vfs::Directory_service::OPEN_ERR_NO_PERM:
errno = EPERM; return 0;
default:
errno = ENOENT; return 0;
}
break;
case Noux::Sysio::OPEN_ERR_NO_PERM: errno = EPERM; return 0;
case Noux::Sysio::OPEN_ERR_EXISTS: errno = EEXIST; return 0;
default: errno = ENOENT; return 0;
case Vfs::Directory_service::OPEN_ERR_NO_PERM: errno = EPERM; return 0;
case Vfs::Directory_service::OPEN_ERR_EXISTS: errno = EEXIST; return 0;
default: errno = ENOENT; return 0;
}
}
@ -1070,13 +1073,13 @@ namespace {
if (!noux_syscall(Noux::Session::SYSCALL_WRITE)) {
switch (sysio()->error.write) {
case Noux::Sysio::WRITE_ERR_AGAIN: errno = EAGAIN; break;
case Noux::Sysio::WRITE_ERR_WOULD_BLOCK: errno = EWOULDBLOCK; break;
case Noux::Sysio::WRITE_ERR_INVALID: errno = EINVAL; break;
case Noux::Sysio::WRITE_ERR_IO: errno = EIO; break;
case Noux::Sysio::WRITE_ERR_INTERRUPT: errno = EINTR; break;
case Vfs::File_io_service::WRITE_ERR_AGAIN: errno = EAGAIN; break;
case Vfs::File_io_service::WRITE_ERR_WOULD_BLOCK: errno = EWOULDBLOCK; break;
case Vfs::File_io_service::WRITE_ERR_INVALID: errno = EINVAL; break;
case Vfs::File_io_service::WRITE_ERR_IO: errno = EIO; break;
case Vfs::File_io_service::WRITE_ERR_INTERRUPT: errno = EINTR; break;
default:
if (sysio()->error.general == Noux::Sysio::ERR_FD_INVALID)
if (sysio()->error.general == Vfs::Directory_service::ERR_FD_INVALID)
errno = EBADF;
else
errno = 0;
@ -1106,13 +1109,13 @@ namespace {
if (!noux_syscall(Noux::Session::SYSCALL_READ)) {
switch (sysio()->error.read) {
case Noux::Sysio::READ_ERR_AGAIN: errno = EAGAIN; break;
case Noux::Sysio::READ_ERR_WOULD_BLOCK: errno = EWOULDBLOCK; break;
case Noux::Sysio::READ_ERR_INVALID: errno = EINVAL; break;
case Noux::Sysio::READ_ERR_IO: errno = EIO; break;
case Noux::Sysio::READ_ERR_INTERRUPT: errno = EINTR; break;
case Vfs::File_io_service::READ_ERR_AGAIN: errno = EAGAIN; break;
case Vfs::File_io_service::READ_ERR_WOULD_BLOCK: errno = EWOULDBLOCK; break;
case Vfs::File_io_service::READ_ERR_INVALID: errno = EINVAL; break;
case Vfs::File_io_service::READ_ERR_IO: errno = EIO; break;
case Vfs::File_io_service::READ_ERR_INTERRUPT: errno = EINTR; break;
default:
if (sysio()->error.general == Noux::Sysio::ERR_FD_INVALID)
if (sysio()->error.general == Vfs::Directory_service::ERR_FD_INVALID)
errno = EBADF;
else
errno = 0;
@ -1159,12 +1162,12 @@ namespace {
* Marshal ioctl arguments
*/
sysio()->ioctl_in.fd = noux_fd(fd->context);
sysio()->ioctl_in.request = Noux::Sysio::Ioctl_in::OP_UNDEFINED;
sysio()->ioctl_in.request = Vfs::File_io_service::IOCTL_OP_UNDEFINED;
switch (request) {
case TIOCGWINSZ:
sysio()->ioctl_in.request = Noux::Sysio::Ioctl_in::OP_TIOCGWINSZ;
sysio()->ioctl_in.request = Vfs::File_io_service::IOCTL_OP_TIOCGWINSZ;
break;
case TIOCGETA:
@ -1192,7 +1195,7 @@ namespace {
case TIOCSETAF:
{
sysio()->ioctl_in.request = Noux::Sysio::Ioctl_in::OP_TIOCSETAF;
sysio()->ioctl_in.request = Vfs::File_io_service::IOCTL_OP_TIOCSETAF;
::termios *termios = (::termios *)argp;
@ -1200,11 +1203,11 @@ namespace {
* For now only enabling/disabling of ECHO is supported
*/
if (termios->c_lflag & (ECHO | ECHONL)) {
sysio()->ioctl_in.argp = (Noux::Sysio::Ioctl_in::VAL_ECHO |
Noux::Sysio::Ioctl_in::VAL_ECHONL);
sysio()->ioctl_in.argp = (Vfs::File_io_service::IOCTL_VAL_ECHO |
Vfs::File_io_service::IOCTL_VAL_ECHONL);
}
else {
sysio()->ioctl_in.argp = Noux::Sysio::Ioctl_in::VAL_NULL;
sysio()->ioctl_in.argp = Vfs::File_io_service::IOCTL_VAL_NULL;
}
break;
@ -1212,7 +1215,7 @@ namespace {
case TIOCSETAW:
{
sysio()->ioctl_in.request = Noux::Sysio::Ioctl_in::OP_TIOCSETAW;
sysio()->ioctl_in.request = Vfs::File_io_service::IOCTL_OP_TIOCSETAW;
sysio()->ioctl_in.argp = argp ? *(int*)argp : 0;
break;
@ -1223,7 +1226,7 @@ namespace {
if (verbose)
PDBG("FIONBIO - *argp=%d", *argp);
sysio()->ioctl_in.request = Noux::Sysio::Ioctl_in::OP_FIONBIO;
sysio()->ioctl_in.request = Vfs::File_io_service::IOCTL_OP_FIONBIO;
sysio()->ioctl_in.argp = argp ? *(int*)argp : 0;
break;
@ -1231,7 +1234,7 @@ namespace {
case DIOCGMEDIASIZE:
{
sysio()->ioctl_in.request = Noux::Sysio::Ioctl_in::OP_DIOCGMEDIASIZE;
sysio()->ioctl_in.request = Vfs::File_io_service::IOCTL_OP_DIOCGMEDIASIZE;
sysio()->ioctl_in.argp = 0;
break;
@ -1243,7 +1246,7 @@ namespace {
break;
}
if (sysio()->ioctl_in.request == Noux::Sysio::Ioctl_in::OP_UNDEFINED) {
if (sysio()->ioctl_in.request == Vfs::File_io_service::IOCTL_OP_UNDEFINED) {
errno = ENOTTY;
return -1;
}
@ -1251,8 +1254,8 @@ namespace {
/* perform syscall */
if (!noux_syscall(Noux::Session::SYSCALL_IOCTL)) {
switch (sysio()->error.ioctl) {
case Noux::Sysio::IOCTL_ERR_INVALID: errno = EINVAL; break;
case Noux::Sysio::IOCTL_ERR_NOTTY: errno = ENOTTY; break;
case Vfs::File_io_service::IOCTL_ERR_INVALID: errno = EINVAL; break;
case Vfs::File_io_service::IOCTL_ERR_NOTTY: errno = ENOTTY; break;
default: errno = 0; break;
}
@ -1373,8 +1376,9 @@ namespace {
sysio()->ftruncate_in.length = length;
if (!noux_syscall(Noux::Session::SYSCALL_FTRUNCATE)) {
switch (sysio()->error.ftruncate) {
case Noux::Sysio::FTRUNCATE_ERR_NO_PERM: errno = EPERM; break;
case Noux::Sysio::FTRUNCATE_ERR_INTERRUPT: errno = EINTR; break;
case Vfs::File_io_service::FTRUNCATE_OK: /* never reached */
case Vfs::File_io_service::FTRUNCATE_ERR_NO_PERM: errno = EPERM; break;
case Vfs::File_io_service::FTRUNCATE_ERR_INTERRUPT: errno = EINTR; break;
}
return -1;
}
@ -1453,8 +1457,8 @@ namespace {
case Noux::Sysio::FCNTL_ERR_CMD_INVALID: errno = EINVAL; break;
default:
switch (sysio()->error.general) {
case Noux::Sysio::ERR_FD_INVALID: errno = EINVAL; break;
case Noux::Sysio::NUM_GENERAL_ERRORS: break;
case Vfs::Directory_service::ERR_FD_INVALID: errno = EINVAL; break;
case Vfs::Directory_service::NUM_GENERAL_ERRORS: break;
}
}
return -1;
@ -1481,23 +1485,23 @@ namespace {
if (!noux_syscall(Noux::Session::SYSCALL_DIRENT)) {
switch (sysio()->error.general) {
case Noux::Sysio::ERR_FD_INVALID:
case Vfs::Directory_service::ERR_FD_INVALID:
errno = EBADF;
PERR("dirent: ERR_FD_INVALID");
return -1;
case Noux::Sysio::NUM_GENERAL_ERRORS: return -1;
case Vfs::Directory_service::NUM_GENERAL_ERRORS: return -1;
}
}
switch (sysio()->dirent_out.entry.type) {
case Noux::Sysio::DIRENT_TYPE_DIRECTORY: dirent->d_type = DT_DIR; break;
case Noux::Sysio::DIRENT_TYPE_FILE: dirent->d_type = DT_REG; break;
case Noux::Sysio::DIRENT_TYPE_SYMLINK: dirent->d_type = DT_LNK; break;
case Noux::Sysio::DIRENT_TYPE_FIFO: dirent->d_type = DT_FIFO; break;
case Noux::Sysio::DIRENT_TYPE_CHARDEV: dirent->d_type = DT_CHR; break;
case Noux::Sysio::DIRENT_TYPE_BLOCKDEV: dirent->d_type = DT_BLK; break;
case Noux::Sysio::DIRENT_TYPE_END: return 0;
case Vfs::Directory_service::DIRENT_TYPE_DIRECTORY: dirent->d_type = DT_DIR; break;
case Vfs::Directory_service::DIRENT_TYPE_FILE: dirent->d_type = DT_REG; break;
case Vfs::Directory_service::DIRENT_TYPE_SYMLINK: dirent->d_type = DT_LNK; break;
case Vfs::Directory_service::DIRENT_TYPE_FIFO: dirent->d_type = DT_FIFO; break;
case Vfs::Directory_service::DIRENT_TYPE_CHARDEV: dirent->d_type = DT_CHR; break;
case Vfs::Directory_service::DIRENT_TYPE_BLOCKDEV: dirent->d_type = DT_BLK; break;
case Vfs::Directory_service::DIRENT_TYPE_END: return 0;
}
dirent->d_fileno = sysio()->dirent_out.entry.fileno;
@ -1529,12 +1533,12 @@ namespace {
if (!noux_syscall(Noux::Session::SYSCALL_LSEEK)) {
switch (sysio()->error.general) {
case Noux::Sysio::ERR_FD_INVALID:
case Vfs::Directory_service::ERR_FD_INVALID:
errno = EBADF;
PERR("lseek: ERR_FD_INVALID");
return -1;
case Noux::Sysio::NUM_GENERAL_ERRORS: return -1;
case Vfs::Directory_service::NUM_GENERAL_ERRORS: return -1;
}
}
@ -1549,8 +1553,8 @@ namespace {
if (!noux_syscall(Noux::Session::SYSCALL_UNLINK)) {
PWRN("unlink syscall failed for path \"%s\"", path);
switch (sysio()->error.unlink) {
case Noux::Sysio::UNLINK_ERR_NO_ENTRY: errno = ENOENT; break;
default: errno = EPERM; break;
case Vfs::Directory_service::UNLINK_ERR_NO_ENTRY: errno = ENOENT; break;
default: errno = EPERM; break;
}
return -1;
}
@ -1592,10 +1596,10 @@ namespace {
if (!noux_syscall(Noux::Session::SYSCALL_RENAME)) {
PWRN("rename syscall failed for \"%s\" -> \"%s\"", from_path, to_path);
switch (sysio()->error.rename) {
case Noux::Sysio::RENAME_ERR_NO_ENTRY: errno = ENOENT; break;
case Noux::Sysio::RENAME_ERR_CROSS_FS: errno = EXDEV; break;
case Noux::Sysio::RENAME_ERR_NO_PERM: errno = EPERM; break;
default: errno = EPERM; break;
case Vfs::Directory_service::RENAME_ERR_NO_ENTRY: errno = ENOENT; break;
case Vfs::Directory_service::RENAME_ERR_CROSS_FS: errno = EXDEV; break;
case Vfs::Directory_service::RENAME_ERR_NO_PERM: errno = EPERM; break;
default: errno = EPERM; break;
}
return -1;
}
@ -1611,12 +1615,12 @@ namespace {
if (!noux_syscall(Noux::Session::SYSCALL_MKDIR)) {
PWRN("mkdir syscall failed for \"%s\" mode=0x%x", path, (int)mode);
switch (sysio()->error.mkdir) {
case Noux::Sysio::MKDIR_ERR_EXISTS: errno = EEXIST; break;
case Noux::Sysio::MKDIR_ERR_NO_ENTRY: errno = ENOENT; break;
case Noux::Sysio::MKDIR_ERR_NO_SPACE: errno = ENOSPC; break;
case Noux::Sysio::MKDIR_ERR_NAME_TOO_LONG: errno = ENAMETOOLONG; break;
case Noux::Sysio::MKDIR_ERR_NO_PERM: errno = EPERM; break;
default: errno = EPERM; break;
case Vfs::Directory_service::MKDIR_ERR_EXISTS: errno = EEXIST; break;
case Vfs::Directory_service::MKDIR_ERR_NO_ENTRY: errno = ENOENT; break;
case Vfs::Directory_service::MKDIR_ERR_NO_SPACE: errno = ENOSPC; break;
case Vfs::Directory_service::MKDIR_ERR_NAME_TOO_LONG: errno = ENAMETOOLONG; break;
case Vfs::Directory_service::MKDIR_ERR_NO_PERM: errno = EPERM; break;
default: errno = EPERM; break;
}
return -1;
}

465
ports/src/noux/block_file_system.h
View File

@ -1,465 +0,0 @@
/*
* \brief Block device file system
* \author Josef Soentgen
* \date 2013-12-20
*/
/*
* Copyright (C) 2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__BLOCK_FILE_SYSTEM_H_
#define _NOUX__BLOCK_FILE_SYSTEM_H_
/* Genode includes */
#include <base/allocator_avl.h>
#include <base/printf.h>
#include <base/lock.h>
#include <base/stdint.h>
#include <block_session/connection.h>
#include <util/string.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include "file_system.h"
namespace Noux {
class Block_file_system : public File_system
{
private:
struct Label
{
enum { LABEL_MAX_LEN = 64 };
char string[LABEL_MAX_LEN];
Label(Xml_node config)
{
string[0] = 0;
try { config.attribute("label").value(string, sizeof(string)); }
catch (...) { }
}
} _label;
char *_block_buffer;
unsigned _block_buffer_count;
Genode::Allocator_avl _tx_block_alloc;
Block::Connection _block;
size_t _block_size;
Block::sector_t _block_count;
Block::Session::Operations _block_ops;
Block::Session::Tx::Source *_tx_source;
off_t _seek_offset;
bool _readable;
bool _writeable;
enum { FILENAME_MAX_LEN = 64 };
char _filename[FILENAME_MAX_LEN];
bool _is_root(const char *path)
{
return (strcmp(path, "") == 0) || (strcmp(path, "/") == 0);
}
bool _is_block_file(const char *path)
{
return (strlen(path) == (strlen(_filename) + 1)) &&
(strcmp(&path[1], _filename) == 0);
}
size_t _block_io(size_t nr, void *buf, size_t sz, bool write, bool bulk = false)
{
Block::Packet_descriptor::Opcode op;
op = write ? Block::Packet_descriptor::WRITE : Block::Packet_descriptor::READ;
size_t packet_size = bulk ? sz : _block_size;
size_t packet_count = bulk ? (sz / _block_size) : 1;
/* sanity check */
if (packet_count > _block_buffer_count) {
packet_size = _block_buffer_count * _block_size;
packet_count = _block_buffer_count;
}
//if (verbose)
PDBG("%5s: block:%zu size:%zu packets:%zu",
write ? "write" : "read", nr, sz, packet_count);
Block::Packet_descriptor p(_tx_source->alloc_packet(packet_size), op,
nr, packet_count);
if (write)
Genode::memcpy(_tx_source->packet_content(p), buf, packet_size);
_tx_source->submit_packet(p);
p = _tx_source->get_acked_packet();
if (!p.succeeded()) {
PERR("Could not read block(s)");
_tx_source->release_packet(p);
return 0;
}
if (!write)
Genode::memcpy(buf, _tx_source->packet_content(p), packet_size);
_tx_source->release_packet(p);
return packet_size;
}
public:
Block_file_system(Xml_node config)
:
_label(config),
_block_buffer(0),
_block_buffer_count(1),
_tx_block_alloc(env()->heap()),
_block(&_tx_block_alloc, 128*1024, _label.string),
_tx_source(_block.tx()),
_seek_offset(0),
_readable(false),
_writeable(false)
{
_filename[0] = 0;
try { config.attribute("name").value(_filename, sizeof(_filename)); }
catch (...) { }
try { config.attribute("block_buffer_count").value(&_block_buffer_count); }
catch (...) { }
_block.info(&_block_count, &_block_size, &_block_ops);
_readable = _block_ops.supported(Block::Packet_descriptor::READ);
_writeable = _block_ops.supported(Block::Packet_descriptor::WRITE);
_block_buffer = new (env()->heap()) char[_block_buffer_count * _block_size];
//if (verbose)
PDBG("number of blocks: %llu with block size: %zu (bytes)"
" , readable: %d writeable: %d",
_block_count, _block_size, _readable, _writeable);
}
~Block_file_system()
{
destroy(env()->heap(), _block_buffer);
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
/* not supported */
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap)
{
/* not supported */
}
bool stat(Sysio *sysio, char const *path)
{
Sysio::Stat st = { 0, 0, 0, 0, 0, 0 };
if (_is_root(path))
st.mode = Sysio::STAT_MODE_DIRECTORY;
else if (_is_block_file(path)) {
st.mode = Sysio::STAT_MODE_BLOCKDEV;
} else {
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
return false;
}
sysio->stat_out.st = st;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
if (_is_root(path)) {
if (index == 0) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_BLOCKDEV;
strncpy(sysio->dirent_out.entry.name,
_filename,
sizeof(sysio->dirent_out.entry.name));
} else {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
}
return true;
}
return false;
}
size_t num_dirent(char const *path)
{
if (_is_root(path))
return 1;
else
return 0;
}
bool is_directory(char const *path)
{
if (_is_root(path))
return true;
return false;
}
char const *leaf_path(char const *path)
{
return path;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
if (!_is_block_file(path)) {
sysio->error.open = Sysio::OPEN_ERR_UNACCESSIBLE;
return 0;
}
return new (env()->heap()) Vfs_handle(this, this, 0);
}
bool unlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool readlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
/* not supported */
return false;
}
bool mkdir(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "block"; }
/********************************
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *vfs_handle)
{
if (!_writeable) {
PERR("block device is not writeable");
return false;
}
size_t _seek_offset = vfs_handle->seek();
size_t count = sysio->write_in.count;
const char *_buf = (const char*) sysio->write_in.chunk;
size_t written = 0;
while (count > 0) {
size_t displ = 0;
size_t length = 0;
size_t nbytes = 0;
size_t blk_nr = _seek_offset / _block_size;
displ = _seek_offset % _block_size;
if ((displ + count) > _block_size)
length = (_block_size - displ);
else
length = count;
/**
* We take a shortcut and write as much as possible without
* using the block buffer if the offset is aligned on a block
* boundary and the count is a multiple of the block size,
* e.g. 4K writes will be written at once.
*
* XXX this is quite hackish because we have to omit partial
* blocks at the end.
*/
if (displ == 0 && (count % _block_size) >= 0 && !(count < _block_size)) {
size_t bytes_left = count - (count % _block_size);
nbytes = _block_io(blk_nr, (void*)(_buf + written),
bytes_left, true, true);
if (nbytes == 0) {
PERR("error while reading block:%zu from block device",
blk_nr);
return false;
}
written += nbytes;
count -= nbytes;
continue;
}
/**
* The offset is not aligned on a block boundary. Therefore
* we need to read the block to the block buffer first and
* put the buffer content at the right offset before we can
* write the whole block back. In addition if length is less
* than block size, we also have to read the block first.
*/
if (displ > 0 || length < _block_size) {
PWRN("offset:%zd block_size:%zd displacement:%zd length:%zu",
_seek_offset, _block_size, displ, length);
_block_io(blk_nr, _block_buffer, _block_size, false);
/* rewind seek offset to account for the block read */
_seek_offset -= _block_size;
}
Genode::memcpy(_block_buffer + displ, _buf + written, length);
nbytes = _block_io(blk_nr, _block_buffer, _block_size, true);
if ((unsigned)nbytes != _block_size) {
PERR("error while reading block:%zu from Block_device",
blk_nr);
return false;
}
written += length;
count -= length;
}
sysio->write_out.count = written;
return true;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
{
if (!_readable) {
PERR("block device is not readable");
return false;
}
size_t _seek_offset = vfs_handle->seek();
size_t count = sysio->read_in.count;
char *_buf = (char*) sysio->read_out.chunk;
size_t read = 0;
while (count > 0) {
size_t displ = 0;
size_t length = 0;
size_t nbytes = 0;
size_t blk_nr = _seek_offset / _block_size;
displ = _seek_offset % _block_size;
if ((displ + count) > _block_size)
length = (_block_size - displ);
else
length = count;
/**
* We take a shortcut and read the blocks all at once if t he
* offset is aligned on a block boundary and we the count is a
* multiple of the block size, e.g. 4K reads will be read at
* once.
*
* XXX this is quite hackish because we have to omit partial
* blocks at the end.
*/
if (displ == 0 && (count % _block_size) >= 0 && !(count < _block_size)) {
size_t bytes_left = count - (count % _block_size);
nbytes = _block_io(blk_nr, _buf + read, bytes_left, false, true);
if (nbytes == 0) {
PERR("error while reading block:%zu from block device",
blk_nr);
return false;
}
read += nbytes;
count -= nbytes;
continue;
}
if (displ > 0)
PWRN("offset:%zd is not aligned to block_size:%zu"
" displacement:%zu", _seek_offset, _block_size,
displ);
nbytes = _block_io(blk_nr, _block_buffer, _block_size, false);
if ((unsigned)nbytes != _block_size) {
PERR("error while reading block:%zu from block device",
blk_nr);
return false;
}
Genode::memcpy(_buf + read, _block_buffer + displ, length);
read += length;
count -= length;
}
sysio->read_out.count = read;
return true;
}
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) { return true; }
bool check_unblock(Vfs_handle *vfs_handle, bool rd, bool wr, bool ex)
{
return true;
}
bool ioctl(Sysio *sysio, Vfs_handle *vfs_handle)
{
switch (sysio->ioctl_in.request) {
case Sysio::Ioctl_in::OP_DIOCGMEDIASIZE:
{
sysio->ioctl_out.diocgmediasize.size = _block_count * _block_size;
return true;
}
default:
PDBG("invalid ioctl request %d", sysio->ioctl_in.request);
return false;
}
/* never reached */
return false;
}
};
}
#endif /* _NOUX__BLOCK_FILE_SYSTEM_H_ */

42
ports/src/noux/child.h
View File

@ -22,7 +22,7 @@
/* Noux includes */
#include <file_descriptor_registry.h>
#include <dir_file_system.h>
#include <vfs/dir_file_system.h>
#include <noux_session/capability.h>
#include <args.h>
#include <environment.h>
@ -183,10 +183,10 @@ namespace Noux {
enum { NAME_MAX_LEN = 128 };
char _name[NAME_MAX_LEN];
Dir_file_system * const _root_dir;
Dataspace_capability const _binary_ds;
Vfs::Dir_file_system * const _root_dir;
Dataspace_capability const _binary_ds;
Elf(char const * const binary_name, Dir_file_system * root_dir,
Elf(char const * const binary_name, Vfs::Dir_file_system * root_dir,
Dataspace_capability binary_ds)
:
_root_dir(root_dir), _binary_ds(binary_ds)
@ -285,7 +285,7 @@ namespace Noux {
io->unregister_wake_up_notifier(&notifier);
}
Dir_file_system * const root_dir() { return _elf._root_dir; }
Vfs::Dir_file_system * const root_dir() { return _elf._root_dir; }
/**
* Method for handling noux network related system calls
@ -310,22 +310,22 @@ namespace Noux {
* looked up at the virtual file
* system
*/
Child(char const *binary_name,
Parent_exit *parent_exit,
Kill_broadcaster &kill_broadcaster,
Parent_execve &parent_execve,
int pid,
Signal_receiver *sig_rec,
Dir_file_system *root_dir,
Args const &args,
Sysio::Env const &env,
Cap_session *cap_session,
Service_registry &parent_services,
Rpc_entrypoint &resources_ep,
bool forked,
Allocator *destruct_alloc,
Destruct_queue &destruct_queue,
bool verbose)
Child(char const *binary_name,
Parent_exit *parent_exit,
Kill_broadcaster &kill_broadcaster,
Parent_execve &parent_execve,
int pid,
Signal_receiver *sig_rec,
Vfs::Dir_file_system *root_dir,
Args const &args,
Sysio::Env const &env,
Cap_session *cap_session,
Service_registry &parent_services,
Rpc_entrypoint &resources_ep,
bool forked,
Allocator *destruct_alloc,
Destruct_queue &destruct_queue,
bool verbose)
:
Family_member(pid),
Destruct_queue::Element<Child>(destruct_alloc),

640
ports/src/noux/dir_file_system.h
View File

@ -1,640 +0,0 @@
/*
* \brief Directory file system
* \author Norman Feske
* \date 2012-04-23
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__DIR_FILE_SYSTEM_H_
#define _NOUX__DIR_FILE_SYSTEM_H_
/* Genode includes */
#include <base/printf.h>
#include <base/lock.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include <file_system_registry.h>
#include <vfs_handle.h>
namespace Noux {
class Dir_file_system : public File_system
{
public:
enum { MAX_NAME_LEN = 128 };
private:
Lock _lock;
/* pointer to first child file system */
File_system *_first_file_system;
/* add new file system to the list of children */
void _append_file_system(File_system *fs)
{
if (!_first_file_system) {
_first_file_system = fs;
return;
}
File_system *curr = _first_file_system;
while (curr->next)
curr = curr->next;
curr->next = fs;
}
/**
* Directory name
*/
char _name[MAX_NAME_LEN];
bool _is_root() const { return _name[0] == 0; }
public:
Dir_file_system(Xml_node node, File_system_registry &fs_registry)
:
_first_file_system(0)
{
/* remember directory name */
if (node.has_type("fstab"))
_name[0] = 0;
else
node.attribute("name").value(_name, sizeof(_name));
for (unsigned i = 0; i < node.num_sub_nodes(); i++) {
Xml_node sub_node = node.sub_node(i);
/* traverse into <dir> nodes */
if (sub_node.has_type("dir")) {
_append_file_system(new Dir_file_system(sub_node,
fs_registry));
continue;
}
File_system_registry::Entry *fs = fs_registry.lookup(sub_node);
if (fs) {
_append_file_system(fs->create(sub_node));
continue;
}
char type_name[64];
sub_node.type_name(type_name, sizeof(type_name));
PWRN("unknown fstab node type <%s>", type_name);
}
}
/**
* Return portion of the path after the element corresponding to
* the current directory.
*/
char const *_sub_path(char const *path) const
{
/* do not strip anything from the path when we are root */
if (_is_root())
return path;
/* skip heading slash in path if present */
if (path[0] == '/')
path++;
size_t const name_len = strlen(_name);
if (strcmp(path, _name, name_len) != 0)
return 0;
path += name_len;
/*
* The first characters of the first path element are equal to
* the current directory name. Let's check if the length of the
* first path element matches the name length.
*/
if (*path != 0 && *path != '/')
return 0;
return path;
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
path = _sub_path(path);
if (!path)
return Dataspace_capability();
/*
* Query sub file systems for dataspace using the path local to
* the respective file system
*/
File_system *fs = _first_file_system;
for (; fs; fs = fs->next) {
Dataspace_capability ds = fs->dataspace(path);
if (ds.valid())
return ds;
}
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap)
{
path = _sub_path(path);
if (!path)
return;
for (File_system *fs = _first_file_system; fs; fs = fs->next)
fs->release(path, ds_cap);
}
bool stat(Sysio *sysio, char const *path)
{
path = _sub_path(path);
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
/* path does not match directory name */
if (!path)
return false;
/*
* If path equals directory name, return information about the
* current directory.
*/
if (strlen(path) == 0) {
sysio->stat_out.st.size = 0;
sysio->stat_out.st.mode = Sysio::STAT_MODE_DIRECTORY | 0755;
sysio->stat_out.st.uid = 0;
sysio->stat_out.st.gid = 0;
return true;
}
/*
* The given path refers to one of our sub directories.
* Propagate the request into our file systems.
*/
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
if (fs->stat(sysio, path)) {
return true;
} else {
/*
* Keep the most meaningful error code. When using
* stacked file systems, most child file systems will
* eventually return 'STAT_ERR_NO_ENTRY' (or leave
* the error code unchanged). If any of those file
* systems has anything more interesting to tell,
* return this information.
*/
if (sysio->error.stat != Sysio::STAT_ERR_NO_ENTRY)
return false;
}
}
/* none of our file systems felt responsible for the path */
return false;
}
/**
* The 'path' is relative to the child file systems.
*/
bool _dirent_of_file_systems(Sysio *sysio, char const *path, off_t index)
{
int base = 0;
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
/*
* Determine number of matching directory entries within
* the current file system.
*/
int const fs_num_dirent = fs->num_dirent(path);
/*
* Query directory entry if index lies with the file
* system.
*/
if (index - base < fs_num_dirent) {
index = index - base;
bool const res = fs->dirent(sysio, path, index);
sysio->dirent_out.entry.fileno += base;
return res;
}
/* adjust base index for next file system */
base += fs_num_dirent;
}
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
return true;
}
bool _dirent_of_this_dir_node(Sysio *sysio, off_t index)
{
if (index == 0) {
strncpy(sysio->dirent_out.entry.name, _name,
sizeof(sysio->dirent_out.entry.name));
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_DIRECTORY;
sysio->dirent_out.entry.fileno = 1;
} else
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
Lock::Guard guard(_lock);
if (_is_root()) {
return _dirent_of_file_systems(sysio, path, index);
} else {
if (strcmp(path, "/") == 0)
return _dirent_of_this_dir_node(sysio, index);
/* path contains at least one element */
/* remove current element from path */
path = _sub_path(path);
if (path) {
return _dirent_of_file_systems(sysio, path, index);
} else {
/* path does not lie within our tree */
return false;
}
}
}
/*
* Accumulate number of directory entries that match in any of
* our sub file systems.
*/
size_t _sum_dirents_of_file_systems(char const *path)
{
size_t cnt = 0;
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
cnt += fs->num_dirent(path);
}
return cnt;
}
size_t num_dirent(char const *path)
{
Lock::Guard guard(_lock);
if (_is_root()) {
return _sum_dirents_of_file_systems(path);
} else {
if (strcmp(path, "/") == 0)
return 1;
/*
* The path contains at least one element. Remove current
* element from path.
*/
path = _sub_path(path);
/*
* If the resulting 'path' is non-NULL, the path lies
* within our tree. In this case, determine the sum of
* matching dirents of all our file systems. Otherwise,
* the specified path lies outside our directory node.
*/
return path ? _sum_dirents_of_file_systems(path) : 0;
}
}
bool is_directory(char const *path)
{
Lock::Guard guard(_lock);
path = _sub_path(path);
if (!path)
return false;
if (strlen(path) == 0)
return true;
for (File_system *fs = _first_file_system; fs; fs = fs->next)
if (fs->is_directory(path))
return true;
return false;
}
char const *leaf_path(char const *path)
{
Lock::Guard guard(_lock);
path = _sub_path(path);
if (!path)
return 0;
if (strlen(path) == 0)
return path;
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
char const *leaf_path = fs->leaf_path(path);
if (leaf_path)
return leaf_path;
}
return 0;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
/*
* If 'path' is a directory, we create a 'Vfs_handle'
* for the root directory so that subsequent 'dirent' calls
* are subjected to the stacked file-system layout.
*/
if (is_directory(path))
return new (env()->heap()) Vfs_handle(this, this, 0);
/*
* If 'path' refers to a non-directory node, create a
* 'Vfs_handle' local to the file system that provides the
* file.
*/
Lock::Guard guard(_lock);
path = _sub_path(path);
/* check if path does not match directory name */
if (!path)
return 0;
/* path equals directory name */
if (strlen(path) == 0)
return new (env()->heap()) Vfs_handle(this, this, 0);
/* path refers to any of our sub file systems */
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
Vfs_handle *vfs_handle = fs->open(sysio, path);
if (vfs_handle)
return vfs_handle;
}
/* path does not match any existing file or directory */
return 0;
}
bool unlink(Sysio *sysio, char const *path)
{
path = _sub_path(path);
sysio->error.unlink = Sysio::UNLINK_ERR_NO_ENTRY;
/* path does not match directory name */
if (!path)
return false;
/*
* Prevent unlinking if path equals directory name defined
* via the static fstab configuration.
*/
if (strlen(path) == 0) {
sysio->error.unlink = Sysio::UNLINK_ERR_NO_PERM;
return false;
}
/*
* The given path refers to at least one of our sub
* directories. Propagate the request into all of our file
* systems. If at least one unlink operation succeeded, we
* return success.
*/
for (File_system *fs = _first_file_system; fs; fs = fs->next)
if (fs->unlink(sysio, path)) {
return true;
} else {
/*
* Keep the most meaningful error code. When using
* stacked file systems, most child file systems will
* eventually return 'UNLINK_ERR_NO_ENTRY' (or leave
* the error code unchanged). If any of those file
* systems has anything more interesting to tell
* (in particular 'UNLINK_ERR_NO_PERM'), return
* this information.
*/
if (sysio->error.unlink != Sysio::UNLINK_ERR_NO_ENTRY)
return false;
}
/* none of our file systems could successfully unlink the path */
return false;
}
bool readlink(Sysio *sysio, char const *path)
{
path = _sub_path(path);
sysio->error.readlink = Sysio::READLINK_ERR_NO_ENTRY;
/* path does not match directory name */
if (!path)
return false;
/* path refers to any of our sub file systems */
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
if (fs->readlink(sysio, path)) {
return true;
} else {
/*
* Keep the most meaningful error code. When using
* stacked file systems, most child file systems will
* eventually return 'READLINK_ERR_NO_ENTRY' (or leave
* the error code unchanged). If any of those file
* systems has anything more interesting to tell,
* return this information.
*/
if (sysio->error.readlink != Sysio::READLINK_ERR_NO_ENTRY)
return false;
}
}
/* none of our file systems could read the link */
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
from_path = _sub_path(from_path);
sysio->error.rename = Sysio::RENAME_ERR_NO_ENTRY;
/* path does not match directory name */
if (!from_path)
return false;
/*
* Prevent renaming if path equals directory name defined
* via the static fstab configuration.
*/
if (strlen(from_path) == 0) {
sysio->error.rename = Sysio::RENAME_ERR_NO_PERM;
return false;
}
/*
* Check if destination path resides within the same file
* system instance as the source path.
*/
to_path = _sub_path(to_path);
if (!to_path) {
sysio->error.rename = Sysio::RENAME_ERR_CROSS_FS;
return false;
}
/* path refers to any of our sub file systems */
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
if (fs->rename(sysio, from_path, to_path)) {
return true;
} else {
/*
* Keep the most meaningful error code. When using
* stacked file systems, most child file systems will
* eventually return 'RENAME_ERR_NO_ENTRY' (or leave
* the error code unchanged). If any of those file
* systems has anything more interesting to tell,
* return this information.
*/
if (sysio->error.rename != Sysio::RENAME_ERR_NO_ENTRY)
return false;
}
}
/* none of our file systems could successfully rename the path */
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
path = _sub_path(path);
sysio->error.symlink = Sysio::SYMLINK_ERR_NO_ENTRY;
/* path does not match directory name */
if (!path)
return false;
/*
* Prevent symlink of path that equals directory name defined
* via the static fstab configuration.
*/
if (strlen(path) == 0) {
sysio->error.symlink = Sysio::SYMLINK_ERR_EXISTS;
return false;
}
/* path refers to any of our sub file systems */
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
if (fs->symlink(sysio, path)) {
return true;
} else {
/*
* Keep the most meaningful error code. When using
* stacked file systems, most child file systems will
* eventually return 'SYMLINK_ERR_NO_ENTRY' (or leave
* the error code unchanged). If any of those file
* systems has anything more interesting to tell,
* return this information.
*/
if (sysio->error.symlink != Sysio::SYMLINK_ERR_NO_ENTRY)
return false;
}
}
/* none of our file systems could create the symlink */
return false;
}
bool mkdir(Sysio *sysio, char const *path)
{
path = _sub_path(path);
sysio->error.mkdir = Sysio::MKDIR_ERR_NO_ENTRY;
/* path does not match directory name */
if (!path)
return false;
/*
* Prevent mkdir of path that equals directory name defined
* via the static fstab configuration.
*/
if (strlen(path) == 0) {
sysio->error.mkdir = Sysio::MKDIR_ERR_EXISTS;
return false;
}
/* path refers to any of our sub file systems */
for (File_system *fs = _first_file_system; fs; fs = fs->next) {
if (fs->mkdir(sysio, path)) {
return true;
} else {
/*
* Keep the most meaningful error code. When using
* stacked file systems, most child file systems will
* eventually return 'MKDIR_ERR_NO_ENTRY' (or leave
* the error code unchanged). If any of those file
* systems has anything more interesting to tell,
* return this information.
*/
if (sysio->error.mkdir != Sysio::MKDIR_ERR_NO_ENTRY)
return false;
}
}
/* none of our file systems could create the directory */
return false;
}
/***************************
** File_system interface **
***************************/
char const *name() const { return "dir"; }
/**
* Synchronize all file systems
*/
void sync()
{
for (File_system *fs = _first_file_system; fs; fs = fs->next)
fs->sync();
}
/********************************
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *handle) { return false; }
bool read(Sysio *sysio, Vfs_handle *vfs_handle) { return false; }
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) { return false; }
};
}
#endif /* _NOUX__DIR_FILE_SYSTEM_H_ */

57
ports/src/noux/directory_service.h
View File

@ -1,57 +0,0 @@
/*
* \brief Directory-service interface
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__DIRECTORY_SERVICE_H_
#define _NOUX__DIRECTORY_SERVICE_H_
/* Genode includes */
#include <dataspace/capability.h>
/* Noux includes */
#include <noux_session/sysio.h>
namespace Noux {
class Vfs_handle;
/**
* Abstract interface to stateless directory service
*/
struct Directory_service
{
virtual Dataspace_capability dataspace(char const *path) = 0;
virtual void release(char const *path, Dataspace_capability) = 0;
virtual Vfs_handle *open(Sysio *sysio, char const *path) = 0;
virtual bool stat(Sysio *sysio, char const *path) = 0;
virtual bool dirent(Sysio *sysio, char const *path, off_t index) = 0;
virtual bool unlink(Sysio *sysio, char const *path) = 0;
virtual bool readlink(Sysio *sysio, char const *path) = 0;
virtual bool rename(Sysio *sysio, char const *from_path,
char const *to_path) = 0;
virtual bool mkdir(Sysio *sysio, char const *path) = 0;
virtual bool symlink(Sysio *sysio, char const *path) = 0;
/**
* Return number of directory entries located at given path
*/
virtual size_t num_dirent(char const *path) = 0;
virtual bool is_directory(char const *path) = 0;
virtual char const *leaf_path(char const *path) = 0;
};
}
#endif /* _NOUX__DIRECTORY_SERVICE_H_ */

54
ports/src/noux/file_io_service.h
View File

@ -1,54 +0,0 @@
/*
* \brief Interface for operations provided by file I/O service
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__FILE_IO_SERVICE_H_
#define _NOUX__FILE_IO_SERVICE_H_
namespace Noux {
class Vfs_handle;
class Sysio;
/**
* Abstract file-system interface
*/
struct File_io_service
{
virtual bool write(Sysio *sysio, Vfs_handle *vfs_handle) = 0;
virtual bool read(Sysio *sysio, Vfs_handle *vfs_handle) = 0;
virtual bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) = 0;
/**
* This method is only needed in file-systems which actually implement
* a device and is therefore false by default.
*/
virtual bool ioctl(Sysio *sysio, Vfs_handle *vfs_handle) { return false; }
/**
* Return true if an unblocking condition of the file is satisfied
*
* \param rd if true, check for data available for reading
* \param wr if true, check for readiness for writing
* \param ex if true, check for exceptions
*/
virtual bool check_unblock(Vfs_handle *vfs_handle,
bool rd, bool wr, bool ex)
{ return true; }
virtual void register_read_ready_sigh(Vfs_handle *vfs_handle,
Signal_context_capability sigh)
{ }
};
}
#endif /* _NOUX__FILE_IO_SERVICE_H_ */

50
ports/src/noux/file_system.h
View File

@ -1,50 +0,0 @@
/*
* \brief File-system related interfaces for Noux
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__FILE_SYSTEM_H_
#define _NOUX__FILE_SYSTEM_H_
/* Genode includes */
#include <util/list.h>
#include <util/string.h>
#include <util/xml_node.h>
/* Noux includes */
#include <directory_service.h>
#include <file_io_service.h>
#include <path.h>
#include <noux_session/sysio.h>
namespace Noux {
struct File_system : Directory_service, File_io_service
{
/**
* Our next sibling within the same 'Dir_file_system'
*/
struct File_system *next;
File_system() : next(0) { }
/**
* Synchronize file system
*
* This function is only used by a Fs_file_system because such a
* file system may employ a backend, which maintains a internal
* cache, that needs to be flushed.
*/
virtual void sync() { }
};
}
#endif /* _NOUX__FILE_SYSTEM_H_ */

55
ports/src/noux/file_system_registry.h
View File

@ -1,55 +0,0 @@
/*
* \brief Registry of file systems
* \author Norman Feske
* \date 2014-04-07
*/
/*
* Copyright (C) 2014 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__FILE_SYSTEM_REGISTRY_H_
#define _NOUX__FILE_SYSTEM_REGISTRY_H_
/* Noux includes */
#include <file_system.h>
namespace Noux {
class File_system_registry
{
public:
struct Entry : List<Entry>::Element
{
virtual File_system *create(Xml_node node) = 0;
virtual bool matches(Xml_node node) = 0;
};
private:
List<Entry> _list;
public:
void insert(Entry &entry)
{
_list.insert(&entry);
}
Entry *lookup(Xml_node node)
{
for (Entry *e = _list.first(); e; e = e->next())
if (e->matches(node))
return e;
return 0;
}
};
}
#endif /* _NOUX__FILE_SYSTEM_REGISTRY_H_ */

647
ports/src/noux/fs_file_system.h
View File

@ -1,647 +0,0 @@
/*
* \brief Adapter from Genode 'File_system' session to Noux file system
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2012-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__FS_FILE_SYSTEM_H_
#define _NOUX__FS_FILE_SYSTEM_H_
/* Genode includes */
#include <base/allocator_avl.h>
#include <base/env.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include <file_system_session/connection.h>
namespace Noux {
class Fs_file_system : public File_system
{
enum { verbose = false };
private:
Lock _lock;
Allocator_avl _fs_packet_alloc;
struct Label
{
enum { LABEL_MAX_LEN = 64 };
char string[LABEL_MAX_LEN];
Label(Xml_node config)
{
string[0] = 0;
try { config.attribute("label").value(string, sizeof(string)); }
catch (...) { }
}
} _label;
::File_system::Connection _fs;
class Fs_vfs_handle : public Vfs_handle
{
private:
::File_system::File_handle const _handle;
public:
Fs_vfs_handle(File_system *fs, int status_flags,
::File_system::File_handle handle)
: Vfs_handle(fs, fs, status_flags), _handle(handle)
{ }
~Fs_vfs_handle()
{
Fs_file_system *fs = static_cast<Fs_file_system *>(ds());
fs->_fs.close(_handle);
}
::File_system::File_handle file_handle() const { return _handle; }
};
/**
* Helper for managing the lifetime of temporary open node handles
*/
struct Fs_handle_guard
{
::File_system::Session &_fs;
::File_system::Node_handle _handle;
Fs_handle_guard(::File_system::Session &fs,
::File_system::Node_handle handle)
: _fs(fs), _handle(handle) { }
~Fs_handle_guard() { _fs.close(_handle); }
};
size_t _read(::File_system::Node_handle node_handle, void *buf,
size_t count, size_t seek_offset)
{
::File_system::Session::Tx::Source &source = *_fs.tx();
size_t const max_packet_size = source.bulk_buffer_size() / 2;
count = min(max_packet_size, count);
::File_system::Packet_descriptor
packet(source.alloc_packet(count),
0,
node_handle,
::File_system::Packet_descriptor::READ,
count,
seek_offset);
/* pass packet to server side */
source.submit_packet(packet);
source.get_acked_packet();
memcpy(buf, source.packet_content(packet), count);
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
source.release_packet(packet);
return count;
}
size_t _write(::File_system::Node_handle node_handle,
const char *buf, size_t count, size_t seek_offset)
{
::File_system::Session::Tx::Source &source = *_fs.tx();
size_t const max_packet_size = source.bulk_buffer_size() / 2;
count = min(max_packet_size, count);
::File_system::Packet_descriptor
packet(source.alloc_packet(count),
0,
node_handle,
::File_system::Packet_descriptor::WRITE,
count,
seek_offset);
memcpy(source.packet_content(packet), buf, count);
/* pass packet to server side */
source.submit_packet(packet);
source.get_acked_packet();
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
source.release_packet(packet);
return count;
}
public:
/*
* XXX read label from config
*/
Fs_file_system(Xml_node config)
:
_fs_packet_alloc(env()->heap()),
_label(config),
_fs(_fs_packet_alloc, 128*1024, _label.string)
{ }
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
Lock::Guard guard(_lock);
Absolute_path dir_path(path);
dir_path.strip_last_element();
Absolute_path file_name(path);
file_name.keep_only_last_element();
Ram_dataspace_capability ds_cap;
char *local_addr = 0;
try {
::File_system::Dir_handle dir = _fs.dir(dir_path.base(),
false);
Fs_handle_guard dir_guard(_fs, dir);
::File_system::File_handle file =
_fs.file(dir, file_name.base() + 1,
::File_system::READ_ONLY, false);
Fs_handle_guard file_guard(_fs, file);
::File_system::Status status = _fs.status(file);
Ram_dataspace_capability ds_cap =
env()->ram_session()->alloc(status.size);
local_addr = env()->rm_session()->attach(ds_cap);
::File_system::Session::Tx::Source &source = *_fs.tx();
size_t const max_packet_size = source.bulk_buffer_size() / 2;
for (size_t seek_offset = 0; seek_offset < status.size;
seek_offset += max_packet_size) {
size_t const count = min(max_packet_size, status.size - seek_offset);
::File_system::Packet_descriptor
packet(source.alloc_packet(count),
0,
file,
::File_system::Packet_descriptor::READ,
count,
seek_offset);
/* pass packet to server side */
source.submit_packet(packet);
source.get_acked_packet();
memcpy(local_addr + seek_offset, source.packet_content(packet), count);
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
source.release_packet(packet);
}
env()->rm_session()->detach(local_addr);
return ds_cap;
} catch(...) {
env()->rm_session()->detach(local_addr);
env()->ram_session()->free(ds_cap);
return Dataspace_capability();
}
}
void release(char const *path, Dataspace_capability ds_cap)
{
env()->ram_session()->free(static_cap_cast<Ram_dataspace>(ds_cap));
}
bool stat(Sysio *sysio, char const *path)
{
::File_system::Status status;
try {
::File_system::Node_handle node = _fs.node(path);
Fs_handle_guard node_guard(_fs, node);
status = _fs.status(node);
} catch (...) {
if (verbose)
PDBG("stat failed for path '%s'", path);
return false;
}
memset(&sysio->stat_out.st, 0, sizeof(sysio->stat_out.st));
sysio->stat_out.st.size = status.size;
sysio->stat_out.st.mode = Sysio::STAT_MODE_FILE | 0777;
if (status.is_symlink())
sysio->stat_out.st.mode = Sysio::STAT_MODE_SYMLINK | 0777;
if (status.is_directory())
sysio->stat_out.st.mode = Sysio::STAT_MODE_DIRECTORY | 0777;
sysio->stat_out.st.uid = 0;
sysio->stat_out.st.gid = 0;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
Lock::Guard guard(_lock);
::File_system::Session::Tx::Source &source = *_fs.tx();
if (strcmp(path, "") == 0)
path = "/";
::File_system::Dir_handle dir_handle = _fs.dir(path, false);
Fs_handle_guard dir_guard(_fs, dir_handle);
enum { DIRENT_SIZE = sizeof(::File_system::Directory_entry) };
::File_system::Packet_descriptor
packet(source.alloc_packet(DIRENT_SIZE),
0,
dir_handle,
::File_system::Packet_descriptor::READ,
DIRENT_SIZE,
index*DIRENT_SIZE);
/* pass packet to server side */
source.submit_packet(packet);
source.get_acked_packet();
/*
* XXX check if acked packet belongs to request,
* needed for thread safety
*/
typedef ::File_system::Directory_entry Directory_entry;
/* copy-out payload into destination buffer */
Directory_entry const *entry =
(Directory_entry *)source.packet_content(packet);
/*
* The default value has no meaning because the switch below
* assigns a value in each possible branch. But it is needed to
* keep the compiler happy.
*/
Sysio::Dirent_type type = Sysio::DIRENT_TYPE_END;
switch (entry->type) {
case Directory_entry::TYPE_DIRECTORY: type = Sysio::DIRENT_TYPE_DIRECTORY; break;
case Directory_entry::TYPE_FILE: type = Sysio::DIRENT_TYPE_FILE; break;
case Directory_entry::TYPE_SYMLINK: type = Sysio::DIRENT_TYPE_SYMLINK; break;
}
sysio->dirent_out.entry.type = type;
sysio->dirent_out.entry.fileno = index + 1;
strncpy(sysio->dirent_out.entry.name, entry->name,
sizeof(sysio->dirent_out.entry.name));
source.release_packet(packet);
return true;
}
bool unlink(Sysio *sysio, char const *path)
{
Lock::Guard guard(_lock);
Absolute_path dir_path(path);
dir_path.strip_last_element();
Absolute_path file_name(path);
file_name.keep_only_last_element();
try {
::File_system::Dir_handle dir = _fs.dir(dir_path.base(), false);
Fs_handle_guard dir_guard(_fs, dir);
_fs.unlink(dir, file_name.base() + 1);
} catch (...) {
sysio->error.unlink = Sysio::UNLINK_ERR_NO_ENTRY;
return false;
}
return true;
}
bool readlink(Sysio *sysio, char const *path)
{
/*
* Canonicalize path (i.e., path must start with '/')
*/
Absolute_path abs_path(path);
abs_path.strip_last_element();
Absolute_path symlink_name(path);
symlink_name.keep_only_last_element();
Sysio::Readlink_error error = Sysio::READLINK_ERR_NO_ENTRY;
try {
::File_system::Dir_handle dir_handle = _fs.dir(abs_path.base(), false);
Fs_handle_guard from_dir_guard(_fs, dir_handle);
::File_system::Symlink_handle symlink_handle =
_fs.symlink(dir_handle, symlink_name.base() + 1, false);
Fs_handle_guard symlink_guard(_fs, symlink_handle);
sysio->readlink_out.count = _read(symlink_handle,
sysio->readlink_out.chunk,
min(sysio->readlink_in.bufsiz,
sizeof(sysio->readlink_out.chunk)),
0);
return true;
} catch (...) { }
sysio->error.readlink = error;
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
Absolute_path from_dir_path(from_path);
from_dir_path.strip_last_element();
Absolute_path from_file_name(from_path);
from_file_name.keep_only_last_element();
Absolute_path to_dir_path(to_path);
to_dir_path.strip_last_element();
Absolute_path to_file_name(to_path);
to_file_name.keep_only_last_element();
try {
::File_system::Dir_handle from_dir = _fs.dir(from_dir_path.base(), false);
Fs_handle_guard from_dir_guard(_fs, from_dir);
::File_system::Dir_handle to_dir = _fs.dir(to_dir_path.base(), false);
Fs_handle_guard to_dir_guard(_fs, to_dir);
_fs.move(from_dir, from_file_name.base() + 1,
to_dir, to_file_name.base() + 1);
} catch (...) {
sysio->error.unlink = Sysio::UNLINK_ERR_NO_ENTRY;
return false;
}
return true;
}
bool mkdir(Sysio *sysio, char const *path)
{
/*
* Canonicalize path (i.e., path must start with '/')
*/
Absolute_path abs_path(path);
Sysio::Mkdir_error error = Sysio::MKDIR_ERR_NO_PERM;
try {
_fs.dir(abs_path.base(), true);
return true;
}
catch (::File_system::Permission_denied) { error = Sysio::MKDIR_ERR_NO_PERM; }
catch (::File_system::Node_already_exists) { error = Sysio::MKDIR_ERR_EXISTS; }
catch (::File_system::Lookup_failed) { error = Sysio::MKDIR_ERR_NO_ENTRY; }
catch (::File_system::Name_too_long) { error = Sysio::MKDIR_ERR_NAME_TOO_LONG; }
catch (::File_system::No_space) { error = Sysio::MKDIR_ERR_NO_SPACE; }
sysio->error.mkdir = error;
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
/*
* Canonicalize path (i.e., path must start with '/')
*/
Absolute_path abs_path(path);
abs_path.strip_last_element();
Absolute_path symlink_name(path);
symlink_name.keep_only_last_element();
Sysio::Symlink_error error = Sysio::SYMLINK_ERR_NO_ENTRY;
try {
::File_system::Dir_handle dir_handle = _fs.dir(abs_path.base(), false);
Fs_handle_guard from_dir_guard(_fs, dir_handle);
::File_system::Symlink_handle symlink_handle =
_fs.symlink(dir_handle, symlink_name.base() + 1, true);
Fs_handle_guard symlink_guard(_fs, symlink_handle);
_write(symlink_handle, sysio->symlink_in.oldpath,
strlen(sysio->symlink_in.oldpath) + 1, 0);
return true;
}
catch (::File_system::Invalid_handle) { error = Sysio::SYMLINK_ERR_NO_ENTRY; }
catch (::File_system::Node_already_exists) { error = Sysio::SYMLINK_ERR_EXISTS; }
catch (::File_system::Invalid_name) { error = Sysio::SYMLINK_ERR_NAME_TOO_LONG; }
catch (::File_system::Lookup_failed) { error = Sysio::SYMLINK_ERR_NO_ENTRY; }
sysio->error.symlink = error;
return false;
}
size_t num_dirent(char const *path)
{
if (strcmp(path, "") == 0)
path = "/";
/*
* XXX handle exceptions
*/
::File_system::Node_handle node = _fs.node(path);
Fs_handle_guard node_guard(_fs, node);
::File_system::Status status = _fs.status(node);
return status.size / sizeof(::File_system::Directory_entry);
}
bool is_directory(char const *path)
{
try {
::File_system::Node_handle node = _fs.node(path);
Fs_handle_guard node_guard(_fs, node);
::File_system::Status status = _fs.status(node);
return status.is_directory();
}
catch (...) { return false; }
}
char const *leaf_path(char const *path)
{
/* check if node at path exists within file system */
try {
::File_system::Node_handle node = _fs.node(path);
_fs.close(node);
}
catch (...) {
return 0; }
return path;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
Lock::Guard guard(_lock);
Absolute_path dir_path(path);
dir_path.strip_last_element();
Absolute_path file_name(path);
file_name.keep_only_last_element();
::File_system::Mode mode;
switch (sysio->open_in.mode & Sysio::OPEN_MODE_ACCMODE) {
default: mode = ::File_system::STAT_ONLY; break;
case Sysio::OPEN_MODE_RDONLY: mode = ::File_system::READ_ONLY; break;
case Sysio::OPEN_MODE_WRONLY: mode = ::File_system::WRITE_ONLY; break;
case Sysio::OPEN_MODE_RDWR: mode = ::File_system::READ_WRITE; break;
}
bool const create = sysio->open_in.mode & Sysio::OPEN_MODE_CREATE;
if (create)
if (verbose)
PDBG("creation of file %s requested", file_name.base() + 1);
Sysio::Open_error error = Sysio::OPEN_ERR_UNACCESSIBLE;
try {
::File_system::Dir_handle dir = _fs.dir(dir_path.base(), false);
Fs_handle_guard dir_guard(_fs, dir);
::File_system::File_handle file = _fs.file(dir, file_name.base() + 1,
mode, create);
return new (env()->heap()) Fs_vfs_handle(this, sysio->open_in.mode, file);
}
catch (::File_system::Permission_denied) {
error = Sysio::OPEN_ERR_NO_PERM; }
catch (::File_system::Invalid_handle) {
error = Sysio::OPEN_ERR_NO_PERM; }
catch (::File_system::Lookup_failed) {
error = Sysio::OPEN_ERR_UNACCESSIBLE; }
catch (::File_system::Node_already_exists) {
error = Sysio::OPEN_ERR_EXISTS; }
sysio->error.open = error;
return 0;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "fs"; }
void sync()
{
_fs.sync();
}
/********************************
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *vfs_handle)
{
Fs_vfs_handle const *handle = static_cast<Fs_vfs_handle *>(vfs_handle);
size_t const count = min(sizeof(sysio->write_in.chunk),
sysio->write_in.count);
sysio->write_out.count = _write(handle->file_handle(),
sysio->write_in.chunk, count,
handle->seek());
return true;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
{
Fs_vfs_handle const *handle = static_cast<Fs_vfs_handle *>(vfs_handle);
::File_system::Status status = _fs.status(handle->file_handle());
size_t const file_size = status.size;
size_t const file_bytes_left = file_size >= handle->seek()
? file_size - handle->seek() : 0;
size_t const count = min(file_bytes_left,
min(sizeof(sysio->read_out.chunk),
sysio->read_in.count));
sysio->read_out.count = _read(handle->file_handle(),
sysio->read_out.chunk,
count, handle->seek());
return true;
}
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle)
{
Fs_vfs_handle const *handle = static_cast<Fs_vfs_handle *>(vfs_handle);
Sysio::Ftruncate_error error;
try {
_fs.truncate(handle->file_handle(), sysio->ftruncate_in.length);
return true;
} catch (::File_system::Invalid_handle) {
/* should not happen */
error = Sysio::FTRUNCATE_ERR_NO_PERM;
} catch (::File_system::Permission_denied) {
error = Sysio::FTRUNCATE_ERR_NO_PERM;
}
sysio->error.ftruncate = error;
return false;
}
};
}
#endif /* _NOUX__FS_FILE_SYSTEM_H_ */

17
ports/src/noux/io_channel.h
View File

@ -19,6 +19,7 @@
/* Genode includes */
#include <base/lock.h>
#include <vfs/file_system.h>
/* Noux includes */
#include <noux_session/sysio.h>
@ -72,14 +73,14 @@ namespace Noux {
virtual Io_channel_backend* backend() { return 0; }
virtual bool write(Sysio *sysio, size_t &count) { return false; }
virtual bool read(Sysio *sysio) { return false; }
virtual bool fstat(Sysio *sysio) { return false; }
virtual bool ftruncate(Sysio *sysio) { return false; }
virtual bool fcntl(Sysio *sysio) { return false; }
virtual bool dirent(Sysio *sysio) { return false; }
virtual bool ioctl(Sysio *sysio) { return false; }
virtual bool lseek(Sysio *sysio) { return false; }
virtual bool write(Sysio *sysio, size_t &offset) { return false; }
virtual bool read(Sysio *sysio) { return false; }
virtual bool fstat(Sysio *sysio) { return false; }
virtual bool ftruncate(Sysio *sysio) { return false; }
virtual bool fcntl(Sysio *sysio) { return false; }
virtual bool dirent(Sysio *sysio) { return false; }
virtual bool ioctl(Sysio *sysio) { return false; }
virtual bool lseek(Sysio *sysio) { return false; }
/**
* Return true if an unblocking condition of the channel is satisfied

158
ports/src/noux/main.cc
View File

@ -25,22 +25,21 @@
#include <terminal_io_channel.h>
#include <dummy_input_io_channel.h>
#include <pipe_io_channel.h>
#include <dir_file_system.h>
#include <user_info.h>
#include <io_receptor_registry.h>
#include <destruct_queue.h>
#include <kill_broadcaster.h>
#include <file_system_registry.h>
#include <vfs/dir_file_system.h>
/* supported file systems */
#include <tar_file_system.h>
#include <fs_file_system.h>
#include <terminal_file_system.h>
#include <null_file_system.h>
#include <zero_file_system.h>
#include <stdio_file_system.h>
#include <vfs/tar_file_system.h>
#include <vfs/fs_file_system.h>
#include <vfs/terminal_file_system.h>
#include <vfs/null_file_system.h>
#include <vfs/zero_file_system.h>
#include <vfs/block_file_system.h>
#include <random_file_system.h>
#include <block_file_system.h>
#include <stdio_file_system.h>
static const bool verbose_quota = false;
@ -164,7 +163,7 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
{
size_t const count_in = _sysio->write_in.count;
for (size_t count = 0; count != count_in; ) {
for (size_t offset = 0; offset != count_in; ) {
Shared_pointer<Io_channel> io = _lookup_channel(_sysio->write_in.fd);
@ -174,20 +173,19 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
if (io->check_unblock(false, true, false)) {
/*
* 'io->write' is expected to update
* '_sysio->write_out.count' and 'count'
* '_sysio->write_out.count' and 'offset'
*/
result = io->write(_sysio, count);
result = io->write(_sysio, offset);
if (result == false)
break;
} else {
if (result == false) {
/* nothing was written yet */
_sysio->error.write = Sysio::WRITE_ERR_INTERRUPT;
_sysio->error.write = Vfs::File_io_service::WRITE_ERR_INTERRUPT;
}
break;
}
}
break;
}
@ -201,7 +199,7 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
if (io->check_unblock(true, false, false))
result = io->read(_sysio);
else
_sysio->error.read = Sysio::READ_ERR_INTERRUPT;
_sysio->error.read = Vfs::File_io_service::READ_ERR_INTERRUPT;
break;
}
@ -215,7 +213,7 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
if (io->check_unblock(false, true, false))
result = io->ftruncate(_sysio);
else
_sysio->error.ftruncate = Sysio::FTRUNCATE_ERR_INTERRUPT;
_sysio->error.ftruncate = Vfs::File_io_service::FTRUNCATE_ERR_INTERRUPT;
break;
}
@ -230,9 +228,12 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
size_t path_len = strlen(_sysio->stat_in.path);
uint32_t path_hash = hash_path(_sysio->stat_in.path, path_len);
result = root_dir()->stat(_sysio, _sysio->stat_in.path);
_sysio->error.stat = root_dir()->stat(_sysio->stat_in.path,
_sysio->stat_out.st);
/**
result = (_sysio->error.stat == Vfs::Directory_service::STAT_OK);
/*
* Instead of using the uid/gid given by the actual file system
* we use the ones specificed in the config.
*/
@ -285,7 +286,10 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
case SYSCALL_OPEN:
{
Vfs_handle *vfs_handle = root_dir()->open(_sysio, _sysio->open_in.path);
Vfs::Vfs_handle *vfs_handle = 0;
_sysio->error.open = root_dir()->open(_sysio->open_in.path,
_sysio->open_in.mode,
&vfs_handle);
if (!vfs_handle)
break;
@ -297,7 +301,7 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
* path because path operations always refer to the global
* root.
*/
if (vfs_handle->ds() == root_dir())
if (&vfs_handle->ds() == root_dir())
leaf_path = _sysio->open_in.path;
Shared_pointer<Io_channel>
@ -678,29 +682,43 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
case SYSCALL_UNLINK:
result = root_dir()->unlink(_sysio, _sysio->unlink_in.path);
_sysio->error.unlink = root_dir()->unlink(_sysio->unlink_in.path);
result = (_sysio->error.unlink == Vfs::Directory_service::UNLINK_OK);
break;
case SYSCALL_READLINK:
result = root_dir()->readlink(_sysio, _sysio->readlink_in.path);
break;
_sysio->error.readlink = root_dir()->readlink(_sysio->readlink_in.path,
_sysio->readlink_out.chunk,
min(_sysio->readlink_in.bufsiz,
sizeof(_sysio->readlink_out.chunk)),
_sysio->readlink_out.count);
result = (_sysio->error.readlink == Vfs::Directory_service::READLINK_OK);
break;
case SYSCALL_RENAME:
result = root_dir()->rename(_sysio, _sysio->rename_in.from_path,
_sysio->rename_in.to_path);
_sysio->error.rename = root_dir()->rename(_sysio->rename_in.from_path,
_sysio->rename_in.to_path);
result = (_sysio->error.rename == Vfs::Directory_service::RENAME_OK);
break;
case SYSCALL_MKDIR:
result = root_dir()->mkdir(_sysio, _sysio->mkdir_in.path);
_sysio->error.mkdir = root_dir()->mkdir(_sysio->mkdir_in.path, 0);
result = (_sysio->error.mkdir == Vfs::Directory_service::MKDIR_OK);
break;
case SYSCALL_SYMLINK:
result = root_dir()->symlink(_sysio, _sysio->symlink_in.newpath);
_sysio->error.symlink = root_dir()->symlink(_sysio->symlink_in.oldpath,
_sysio->symlink_in.newpath);
result = (_sysio->error.symlink == Vfs::Directory_service::SYMLINK_OK);
break;
case SYSCALL_USERINFO:
@ -845,7 +863,7 @@ bool Noux::Child::syscall(Noux::Session::Syscall sc)
}
catch (Invalid_fd) {
_sysio->error.general = Sysio::ERR_FD_INVALID;
_sysio->error.general = Vfs::Directory_service::ERR_FD_INVALID;
PERR("Invalid file descriptor"); }
catch (...) { PERR("Unexpected exception"); }
@ -1004,20 +1022,56 @@ void *operator new (Genode::size_t size) {
return Genode::env()->heap()->alloc(size); }
template <typename FILE_SYSTEM>
struct File_system_factory : Noux::File_system_registry::Entry
{
Noux::File_system *create(Genode::Xml_node node) override
{
return new FILE_SYSTEM(node);
}
bool matches(Genode::Xml_node node) override
{
char buf[100];
node.type_name(buf, sizeof(buf));
return node.has_type(FILE_SYSTEM::name());
}
class File_system_factory : public Vfs::File_system_factory
{
public:
struct Entry_base : Genode::List<Entry_base>::Element
{
char const * const name;
Entry_base(char const *name) : name(name) { }
virtual Vfs::File_system *create(Genode::Xml_node node) = 0;
bool matches(Genode::Xml_node node) const
{
return node.has_type(name);
}
};
template <typename FILE_SYSTEM>
struct Entry : Entry_base
{
Entry(char const *name) : Entry_base(name) { }
Vfs::File_system *create(Genode::Xml_node node) override
{
return new FILE_SYSTEM(node);
}
};
private:
Genode::List<Entry_base> _list;
public:
template <typename FS>
void add_fs_type()
{
_list.insert(new Entry<FS>(FS::name()));
}
Vfs::File_system *create(Genode::Xml_node node) override
{
for (Entry_base *e = _list.first(); e; e = e->next())
if (e->matches(node))
return e->create(node);
return 0;
}
};
@ -1046,19 +1100,19 @@ int main(int argc, char **argv)
} catch (Xml_node::Nonexistent_attribute) { }
/* register file systems */
static File_system_registry fs_registry;
fs_registry.insert(*new File_system_factory<Tar_file_system>());
fs_registry.insert(*new File_system_factory<Fs_file_system>());
fs_registry.insert(*new File_system_factory<Terminal_file_system>());
fs_registry.insert(*new File_system_factory<Null_file_system>());
fs_registry.insert(*new File_system_factory<Zero_file_system>());
fs_registry.insert(*new File_system_factory<Stdio_file_system>());
fs_registry.insert(*new File_system_factory<Random_file_system>());
fs_registry.insert(*new File_system_factory<Block_file_system>());
static File_system_factory fs_factory;
fs_factory.add_fs_type<Vfs::Tar_file_system>();
fs_factory.add_fs_type<Vfs::Fs_file_system>();
fs_factory.add_fs_type<Vfs::Terminal_file_system>();
fs_factory.add_fs_type<Vfs::Null_file_system>();
fs_factory.add_fs_type<Vfs::Zero_file_system>();
fs_factory.add_fs_type<Vfs::Block_file_system>();
fs_factory.add_fs_type<Stdio_file_system>();
fs_factory.add_fs_type<Random_file_system>();
/* initialize virtual file system */
static Dir_file_system
root_dir(config()->xml_node().sub_node("fstab"), fs_registry);
static Vfs::Dir_file_system
root_dir(config()->xml_node().sub_node("fstab"), fs_factory);
/* set user information */
try {

14
ports/src/noux/net/socket_io_channel.h
View File

@ -83,9 +83,9 @@ namespace Noux {
switch (errno) {
/* case EAGAIN: sysio->error.read = Sysio::READ_ERR_AGAIN; break; */
case EWOULDBLOCK: sysio->error.read = Sysio::READ_ERR_WOULD_BLOCK; break;
case EINVAL: sysio->error.read = Sysio::READ_ERR_INVALID; break;
case EIO: sysio->error.read = Sysio::READ_ERR_IO; break;
case EWOULDBLOCK: sysio->error.read = Vfs::File_io_service::READ_ERR_WOULD_BLOCK; break;
case EINVAL: sysio->error.read = Vfs::File_io_service::READ_ERR_INVALID; break;
case EIO: sysio->error.read = Vfs::File_io_service::READ_ERR_IO; break;
default:
PDBG("unhandled errno: %d", errno);
break;
@ -107,9 +107,9 @@ namespace Noux {
switch (errno) {
/* case EAGAIN: sysio->error.read = Sysio::READ_ERR_AGAIN; break; */
case EWOULDBLOCK: sysio->error.read = Sysio::READ_ERR_WOULD_BLOCK; break;
case EINVAL: sysio->error.read = Sysio::READ_ERR_INVALID; break;
case EIO: sysio->error.read = Sysio::READ_ERR_IO; break;
case EWOULDBLOCK: sysio->error.read = Vfs::File_io_service::READ_ERR_WOULD_BLOCK; break;
case EINVAL: sysio->error.read = Vfs::File_io_service::READ_ERR_INVALID; break;
case EIO: sysio->error.read = Vfs::File_io_service::READ_ERR_IO; break;
default:
PDBG("unhandled errno: %d", errno);
break;
@ -145,7 +145,7 @@ namespace Noux {
switch (sysio->ioctl_in.request) {
case Sysio::Ioctl_in::OP_FIONBIO: request = FIONBIO; break;
case Vfs::File_io_service::IOCTL_OP_FIONBIO: request = FIONBIO; break;
default:
PDBG("invalid ioctl request: %d", sysio->ioctl_in.request);
return false;

190
ports/src/noux/null_file_system.h
View File

@ -1,190 +0,0 @@
/*
* \brief null filesystem
* \author Josef Soentgen
* \date 2012-07-31
*/
/*
* Copyright (C) 2012-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__NULL_FILE_SYSTEM_H_
#define _NOUX__NULL_FILE_SYSTEM_H_
/* Genode includes */
#include <base/printf.h>
#include <util/string.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include "file_system.h"
namespace Noux {
class Null_file_system : public File_system
{
private:
const char *_filename() { return "null"; }
bool _is_root(const char *path)
{
return (strcmp(path, "") == 0) || (strcmp(path, "/") == 0);
}
bool _is_null_file(const char *path)
{
return (strlen(path) == (strlen(_filename()) + 1)) &&
(strcmp(&path[1], _filename()) == 0);
}
public:
Null_file_system(Xml_node) { }
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
/* not supported */
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap)
{
/* not supported */
}
bool stat(Sysio *sysio, char const *path)
{
Sysio::Stat st = { 0, 0, 0, 0, 0, 0 };
if (_is_root(path))
st.mode = Sysio::STAT_MODE_DIRECTORY;
else if (_is_null_file(path)) {
st.mode = Sysio::STAT_MODE_CHARDEV;
} else {
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
return false;
}
sysio->stat_out.st = st;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
if (_is_root(path)) {
if (index == 0) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_CHARDEV;
strncpy(sysio->dirent_out.entry.name,
_filename(),
sizeof(sysio->dirent_out.entry.name));
} else {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
}
return true;
}
return false;
}
size_t num_dirent(char const *path)
{
if (_is_root(path))
return 1;
else
return 0;
}
bool is_directory(char const *path)
{
if (_is_root(path))
return true;
return false;
}
char const *leaf_path(char const *path)
{
return path;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
if (!_is_null_file(path)) {
sysio->error.open = Sysio::OPEN_ERR_UNACCESSIBLE;
return 0;
}
return new (env()->heap()) Vfs_handle(this, this, 0);
}
bool unlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool readlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
/* not supported */
return false;
}
bool mkdir(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "null"; }
/********************************
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *handle)
{
sysio->write_out.count = sysio->write_in.count;
return true;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
{
sysio->read_out.count = 0;
return true;
}
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) { return true; }
};
}
#endif /* _NOUX__NULL_FILE_SYSTEM_H_ */

7
ports/src/noux/path.h
View File

@ -15,11 +15,8 @@
#define _NOUX__PATH_H_
/* Genode includes */
#include <os/path.h>
#include <vfs/types.h>
/* Noux includes */
#include <noux_session/sysio.h>
namespace Noux { typedef Path<Sysio::MAX_PATH_LEN> Absolute_path; }
namespace Noux { using Vfs::Absolute_path; }
#endif /* _NOUX__PATH_H_ */

23
ports/src/noux/pipe_io_channel.h
View File

@ -229,12 +229,12 @@ namespace Noux {
_pipe->writer_close();
}
bool check_unblock(bool rd, bool wr, bool ex) const
bool check_unblock(bool rd, bool wr, bool ex) const override
{
return wr && _pipe->any_space_avail_for_writing();
}
bool write(Sysio *sysio, size_t &count)
bool write(Sysio *sysio, size_t &offset) override
{
/*
* If the write operation is larger than the space available in
@ -246,18 +246,19 @@ namespace Noux {
*/
/* dimension the pipe write operation to the not yet written data */
size_t curr_count = _pipe->write(sysio->write_in.chunk + count,
sysio->write_in.count - count);
count += curr_count;
size_t curr_count = _pipe->write(sysio->write_in.chunk + offset,
sysio->write_in.count - offset);
offset += curr_count;
return true;
}
bool fstat(Sysio *sysio)
bool fstat(Sysio *sysio) override
{
sysio->fstat_out.st.mode = Sysio::STAT_MODE_CHARDEV;
return true;
}
/**************************************
** Signal_dispatcher_base interface **
**************************************/
@ -265,7 +266,7 @@ namespace Noux {
/**
* Called by Noux main loop on the occurrence of new STDIN input
*/
void dispatch(unsigned)
void dispatch(unsigned) override
{
Io_channel::invoke_all_notifiers();
}
@ -293,7 +294,7 @@ namespace Noux {
_pipe->reader_close();
}
bool check_unblock(bool rd, bool wr, bool ex) const
bool check_unblock(bool rd, bool wr, bool ex) const override
{
/* unblock if the writer has already closed its pipe end */
if (_pipe->writer_is_gone())
@ -302,7 +303,7 @@ namespace Noux {
return (rd && _pipe->data_avail_for_reading());
}
bool read(Sysio *sysio)
bool read(Sysio *sysio) override
{
size_t const max_count =
min(sysio->read_in.count,
@ -314,7 +315,7 @@ namespace Noux {
return true;
}
bool fstat(Sysio *sysio)
bool fstat(Sysio *sysio) override
{
sysio->fstat_out.st.mode = Sysio::STAT_MODE_CHARDEV;
return true;
@ -327,7 +328,7 @@ namespace Noux {
/**
* Called by Noux main loop on the occurrence of new STDIN input
*/
void dispatch(unsigned)
void dispatch(unsigned) override
{
Io_channel::invoke_all_notifiers();
}

173
ports/src/noux/random_file_system.h
View File

@ -21,7 +21,7 @@
/* Noux includes */
#include <noux_session/sysio.h>
#include "file_system.h"
#include <vfs/single_file_system.h>
/*-
* Copyright (c) 2010, 2012
@ -229,154 +229,19 @@ namespace Noux {
};
class Random_file_system : public File_system
class Random_file_system : public Vfs::Single_file_system
{
private:
Arc4random *_arc4random;
const char *_filename() { return "urandom"; }
bool _is_root(const char *path)
{
return (strcmp(path, "") == 0) || (strcmp(path, "/") == 0);
}
bool _is_device_random_file(const char *path)
{
return (strlen(path) == (strlen(_filename()) + 1)) &&
(strcmp(&path[1], _filename()) == 0);
}
Arc4random _arc4random;
public:
Random_file_system(Xml_node node)
{
void *bytes = 0;
size_t nbytes = 0;
_arc4random = new (env()->heap()) Arc4random(bytes, nbytes);
}
~Random_file_system()
{
destroy(env()->heap(), _arc4random);
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
/* not supported */
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap)
{
/* not supported */
}
bool stat(Sysio *sysio, char const *path)
{
Sysio::Stat st = { 0, 0, 0, 0, 0, 0 };
if (_is_root(path))
st.mode = Sysio::STAT_MODE_DIRECTORY;
else if (_is_device_random_file(path)) {
st.mode = Sysio::STAT_MODE_CHARDEV;
} else {
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
return false;
}
sysio->stat_out.st = st;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
if (_is_root(path)) {
if (index == 0) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_CHARDEV;
strncpy(sysio->dirent_out.entry.name,
_filename(),
sizeof(sysio->dirent_out.entry.name));
} else {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
}
return true;
}
return false;
}
size_t num_dirent(char const *path)
{
if (_is_root(path))
return 1;
else
return 0;
}
bool is_directory(char const *path)
{
if (_is_root(path))
return true;
return false;
}
char const *leaf_path(char const *path)
{
return path;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
if (!_is_device_random_file(path)) {
sysio->error.open = Sysio::OPEN_ERR_UNACCESSIBLE;
return 0;
}
return new (env()->heap()) Vfs_handle(this, this, 0);
}
bool unlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool readlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
/* not supported */
return false;
}
bool mkdir(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
/***************************
** File_system interface **
***************************/
Random_file_system(Xml_node config)
:
Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config),
_arc4random(0, 0)
{ }
static char const *name() { return "random"; }
@ -385,24 +250,26 @@ namespace Noux {
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *handle)
Write_result write(Vfs::Vfs_handle *, char const *, size_t buf_size, size_t &out_count) override
{
sysio->write_out.count = sysio->write_in.count;
out_count = buf_size;
return true;
return WRITE_OK;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
Read_result read(Vfs::Vfs_handle *vfs_handle, char *dst, size_t count,
size_t &out_count) override
{
size_t nbytes = sysio->read_in.count;
_arc4random.get(dst, count);
out_count = count;
_arc4random->get(sysio->read_out.chunk, nbytes);
sysio->read_out.count = nbytes;
return true;
return READ_OK;
}
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) { return true; }
Ftruncate_result ftruncate(Vfs::Vfs_handle *, size_t) override
{
return FTRUNCATE_OK;
}
};
}

197
ports/src/noux/stdio_file_system.h
View File

@ -17,167 +17,30 @@
/* Genode includes */
#include <base/printf.h>
#include <util/string.h>
#include <vfs/single_file_system.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include "file_system.h"
#include "terminal_connection.h"
namespace Noux {
class Stdio_file_system : public File_system
class Stdio_file_system : public Vfs::Single_file_system
{
private:
enum { FILENAME_MAX_LEN = 64 };
char _filename[FILENAME_MAX_LEN];
Terminal::Session_client *_terminal;
bool _echo;
bool _is_root(const char *path)
{
return (strcmp(path, "") == 0) || (strcmp(path, "/") == 0);
}
bool _is_stdio_file(const char *path)
{
return (strlen(path) == (strlen(_filename) + 1)) &&
(strcmp(&path[1], _filename) == 0);
}
public:
Stdio_file_system(Xml_node config,
Terminal::Session_client *terminal = terminal())
Stdio_file_system(Xml_node config)
:
_terminal(terminal),
Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config),
_terminal(terminal()),
_echo(true)
{
_filename[0] = '\0';
try { config.attribute("name").value(_filename, sizeof(_filename)); }
catch (...) { }
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
/* not supported */
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap)
{
/* not supported */
}
bool stat(Sysio *sysio, char const *path)
{
Sysio::Stat st = { 0, 0, 0, 0, 0, 0 };
if (_is_root(path))
st.mode = Sysio::STAT_MODE_DIRECTORY;
else if (_is_stdio_file(path)) {
st.mode = Sysio::STAT_MODE_CHARDEV;
} else {
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
return false;
}
sysio->stat_out.st = st;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
if (_is_root(path)) {
if (index == 0) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_CHARDEV;
strncpy(sysio->dirent_out.entry.name,
_filename,
sizeof(sysio->dirent_out.entry.name));
} else {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
}
return true;
}
return false;
}
size_t num_dirent(char const *path)
{
if (_is_root(path))
return 1;
else
return 0;
}
bool is_directory(char const *path)
{
if (_is_root(path))
return true;
return false;
}
char const *leaf_path(char const *path)
{
return path;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
if (!_is_stdio_file(path)) {
sysio->error.open = Sysio::OPEN_ERR_UNACCESSIBLE;
return 0;
}
return new (env()->heap()) Vfs_handle(this, this, 0);
}
bool unlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool readlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
/* not supported */
return false;
}
bool mkdir(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
/***************************
** File_system interface **
***************************/
{ }
static char const *name() { return "stdio"; }
@ -186,55 +49,53 @@ namespace Noux {
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *handle)
Write_result write(Vfs::Vfs_handle *, char const *buf, size_t buf_size,
size_t &out_count) override
{
sysio->write_out.count = _terminal->write(sysio->write_in.chunk, sysio->write_in.count);
out_count = _terminal->write(buf, buf_size);
return true;
return WRITE_OK;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
Read_result read(Vfs::Vfs_handle *, char *dst, size_t count, size_t &out_count) override
{
sysio->read_out.count = _terminal->read(sysio->read_out.chunk, sysio->read_in.count);
out_count = _terminal->read(dst, count);
if (_echo)
_terminal->write(sysio->read_out.chunk, sysio->read_in.count);
_terminal->write(dst, count);
return true;
return READ_OK;
}
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) { return true; }
bool ioctl(Sysio *sysio, Vfs_handle *vfs_handle)
Ftruncate_result ftruncate(Vfs::Vfs_handle *, size_t) override
{
switch (sysio->ioctl_in.request) {
return FTRUNCATE_OK;
}
case Sysio::Ioctl_in::OP_TIOCSETAF:
Ioctl_result ioctl(Vfs::Vfs_handle *vfs_handle, Ioctl_opcode opcode,
Ioctl_arg arg, Ioctl_out &out) override
{
switch (opcode) {
case Vfs::File_io_service::IOCTL_OP_TIOCSETAF:
{
if (sysio->ioctl_in.argp & (Sysio::Ioctl_in::VAL_ECHO)) {
_echo = true;
}
else {
_echo = false;
}
return true;
_echo = (arg & (Vfs::File_io_service::IOCTL_VAL_ECHO));
return IOCTL_OK;
}
case Sysio::Ioctl_in::OP_TIOCSETAW:
case Vfs::File_io_service::IOCTL_OP_TIOCSETAW:
{
PDBG("OP_TIOCSETAW not implemented");
return false;
return IOCTL_ERR_INVALID;
}
default:
PDBG("invalid ioctl(request=0x%x), %d", sysio->ioctl_in.request,
Sysio::Ioctl_in::OP_TIOCSETAW);
PDBG("invalid ioctl(request=0x%x)", opcode);
break;
}
return false;
return IOCTL_ERR_INVALID;
}
};
}

651
ports/src/noux/tar_file_system.h
View File

@ -1,651 +0,0 @@
/*
* \brief TAR file system
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__TAR_FILE_SYSTEM_H_
#define _NOUX__TAR_FILE_SYSTEM_H_
/* Genode includes */
#include <base/printf.h>
#include <base/lock.h>
#include <rom_session/connection.h>
#include <dataspace/client.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include <file_system.h>
#include <vfs_handle.h>
namespace Noux {
class Tar_file_system : public File_system
{
enum { verbose = false };
Lock _lock;
struct Rom_name
{
enum { ROM_NAME_MAX_LEN = 64 };
char name[ROM_NAME_MAX_LEN];
Rom_name(Xml_node config) {
config.attribute("name").value(name, sizeof(name));
}
} _rom_name;
Rom_connection _rom;
char *_tar_base;
size_t _tar_size;
class Record
{
private:
char _name[100];
char _mode[8];
char _uid[8];
char _gid[8];
char _size[12];
char _mtime[12];
char _checksum[8];
char _type[1];
char _linked_name[100];
/**
* Convert ASCII-encoded octal number to unsigned value
*/
template <typename T>
unsigned long _read(T const &field) const
{
/*
* Copy-out ASCII string to temporary buffer that is
* large enough to host an additional zero.
*/
char buf[sizeof(field) + 1];
strncpy(buf, field, sizeof(buf));
unsigned long value = 0;
ascii_to(buf, &value, 8);
return value;
}
public:
/* length of on data block in tar */
enum { BLOCK_LEN = 512 };
/* record type values */
enum { TYPE_FILE = 0, TYPE_HARDLINK = 1,
TYPE_SYMLINK = 2, TYPE_DIR = 5 };
size_t size() const { return _read(_size); }
unsigned uid() const { return _read(_uid); }
unsigned gid() const { return _read(_gid); }
unsigned mode() const { return _read(_mode); }
unsigned type() const { return _read(_type); }
char const *name() const { return _name; }
char const *linked_name() const { return _linked_name; }
void *data() const { return (char *)this + BLOCK_LEN; }
};
class Tar_vfs_handle : public Vfs_handle
{
private:
Record const *_record;
public:
Tar_vfs_handle(File_system *fs, int status_flags, Record const *record)
: Vfs_handle(fs, fs, status_flags), _record(record)
{ }
Record const *record() const { return _record; }
};
/**
* path element token
*/
struct Scanner_policy_path_element
{
static bool identifier_char(char c, unsigned /* i */)
{
return (c != '/') && (c != 0);
}
};
typedef Genode::Token<Scanner_policy_path_element> Path_element_token;
struct Node : List<Node>, List<Node>::Element
{
char const *name;
Record const *record;
Node(char const *name, Record const *record) : name(name), record(record) { }
Node *lookup(char const *name)
{
Absolute_path lookup_path(name);
if (verbose)
PDBG("lookup_path = %s", lookup_path.base());
Node *parent_node = this;
Node *child_node;
Path_element_token t(lookup_path.base());
while (t) {
if (t.type() != Path_element_token::IDENT) {
t = t.next();
continue;
}
char path_element[Sysio::MAX_PATH_LEN];
t.string(path_element, sizeof(path_element));
if (verbose)
PDBG("path_element = %s", path_element);
for (child_node = parent_node->first(); child_node; child_node = child_node->next()) {
if (verbose)
PDBG("comparing with node %s", child_node->name);
if (strcmp(child_node->name, path_element) == 0) {
if (verbose)
PDBG("found matching child node");
parent_node = child_node;
break;
}
}
if (!child_node)
return 0;
t = t.next();
}
return parent_node;
}
Node *lookup_child(int index)
{
for (Node *child_node = first(); child_node; child_node = child_node->next(), index--) {
if (index == 0)
return child_node;
}
return 0;
}
size_t num_dirent()
{
size_t count = 0;
for (Node *child_node = first(); child_node; child_node = child_node->next(), count++) ;
return count;
}
} _root_node;
/*
* Create a Node for a tar record and insert it into the node list
*/
class Add_node_action
{
private:
Node &_root_node;
public:
Add_node_action(Node &root_node) : _root_node(root_node) { }
void operator()(Record const *record)
{
Absolute_path current_path(record->name());
if (verbose)
PDBG("current_path = %s", current_path.base());
char path_element[Sysio::MAX_PATH_LEN];
Path_element_token t(current_path.base());
Node *parent_node = &_root_node;
Node *child_node;
while(t) {
if (t.type() != Path_element_token::IDENT) {
t = t.next();
continue;
}
Absolute_path remaining_path(t.start());
t.string(path_element, sizeof(path_element));
for (child_node = parent_node->first(); child_node; child_node = child_node->next()) {
if (strcmp(child_node->name, path_element) == 0)
break;
}
if (child_node) {
if (verbose)
PDBG("found node for %s", path_element);
if (remaining_path.has_single_element()) {
/* Found a node for the record to be inserted.
* This is usually a directory node without
* record. */
child_node->record = record;
}
} else {
if (remaining_path.has_single_element()) {
if (verbose)
PDBG("creating node for %s", path_element);
/*
* TODO: find 'path_element' in 'record->name'
* and use the location in the record as name
* pointer to save some memory
*/
size_t name_size = strlen(path_element) + 1;
char *name = (char*)env()->heap()->alloc(name_size);
strncpy(name, path_element, name_size);
child_node = new (env()->heap()) Node(name, record);
} else {
if (verbose)
PDBG("creating node without record for %s", path_element);
/* create a directory node without record */
size_t name_size = strlen(path_element) + 1;
char *name = (char*)env()->heap()->alloc(name_size);
strncpy(name, path_element, name_size);
child_node = new (env()->heap()) Node(name, 0);
}
parent_node->insert(child_node);
}
parent_node = child_node;
t = t.next();
}
}
};
template <typename Tar_record_action>
void _for_each_tar_record_do(Tar_record_action tar_record_action)
{
/* measure size of archive in blocks */
unsigned block_id = 0, block_cnt = _tar_size/Record::BLOCK_LEN;
/* scan metablocks of archive */
while (block_id < block_cnt) {
Record *record = (Record *)(_tar_base + block_id*Record::BLOCK_LEN);
tar_record_action(record);
size_t file_size = record->size();
/* some datablocks */ /* one metablock */
block_id = block_id + (file_size / Record::BLOCK_LEN) + 1;
/* round up */
if (file_size % Record::BLOCK_LEN != 0) block_id++;
/* check for end of tar archive */
if (block_id*Record::BLOCK_LEN >= _tar_size)
break;
/* lookout for empty eof-blocks */
if (*(_tar_base + (block_id*Record::BLOCK_LEN)) == 0x00)
if (*(_tar_base + (block_id*Record::BLOCK_LEN + 1)) == 0x00)
break;
}
}
struct Num_dirent_cache
{
Lock lock;
Node &root_node;
bool valid; /* true after first lookup */
char key[256]; /* key used for lookup */
size_t cached_num_dirent; /* cached value */
Num_dirent_cache(Node &root_node)
: root_node(root_node), valid(false), cached_num_dirent(0) { }
size_t num_dirent(char const *path)
{
Lock::Guard guard(lock);
/* check for cache miss */
if (!valid || strcmp(path, key) != 0) {
Node *node = root_node.lookup(path);
if (!node)
return 0;
strncpy(key, path, sizeof(key));
cached_num_dirent = node->num_dirent();
valid = true;
}
return cached_num_dirent;
}
} _cached_num_dirent;
public:
Tar_file_system(Xml_node config)
:
_rom_name(config), _rom(_rom_name.name),
_tar_base(env()->rm_session()->attach(_rom.dataspace())),
_tar_size(Dataspace_client(_rom.dataspace()).size()),
_root_node("", 0),
_cached_num_dirent(_root_node)
{
PINF("tar archive '%s' local at %p, size is %zd",
_rom_name.name, _tar_base, _tar_size);
_for_each_tar_record_do(Add_node_action(_root_node));
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
/*
* Walk hardlinks until we reach a file
*/
Record const *record = 0;
for (;;) {
Node *node = _root_node.lookup(path);
if (!node)
return Dataspace_capability();
record = node->record;
if (record) {
if (record->type() == Record::TYPE_HARDLINK) {
path = record->linked_name();
continue;
}
if (record->type() == Record::TYPE_FILE)
break;
PERR("TAR record \"%s\" has unsupported type %d",
record->name(), record->type());
}
PERR("TAR record \"%s\" has unsupported type %d",
path, Record::TYPE_DIR);
return Dataspace_capability();
}
try {
Ram_dataspace_capability ds_cap =
env()->ram_session()->alloc(record->size());
void *local_addr = env()->rm_session()->attach(ds_cap);
memcpy(local_addr, record->data(), record->size());
env()->rm_session()->detach(local_addr);
return ds_cap;
}
catch (...) { PDBG("Could not create new dataspace"); }
return Dataspace_capability();
}
void release(char const *, Dataspace_capability ds_cap)
{
env()->ram_session()->free(static_cap_cast<Ram_dataspace>(ds_cap));
}
bool stat(Sysio *sysio, char const *path)
{
if (verbose)
PDBG("path = %s", path);
Node const *node = 0;
Record const *record = 0;
/*
* Walk hardlinks until we reach a file
*/
for (;;) {
node = _root_node.lookup(path);
if (!node) {
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
return false;
}
record = node->record;
if (record) {
if (record->type() == Record::TYPE_HARDLINK) {
path = record->linked_name();
continue;
} else
break;
} else {
if (verbose)
PDBG("found a virtual directoty node");
memset(&sysio->stat_out.st, 0, sizeof(sysio->stat_out.st));
sysio->stat_out.st.mode = Sysio::STAT_MODE_DIRECTORY;
return true;
}
}
/* convert TAR record modes to stat modes */
unsigned mode = record->mode();
switch (record->type()) {
case Record::TYPE_FILE: mode |= Sysio::STAT_MODE_FILE; break;
case Record::TYPE_SYMLINK: mode |= Sysio::STAT_MODE_SYMLINK; break;
case Record::TYPE_DIR: mode |= Sysio::STAT_MODE_DIRECTORY; break;
default:
if (verbose)
PDBG("unhandled record type %d", record->type());
}
memset(&sysio->stat_out.st, 0, sizeof(sysio->stat_out.st));
sysio->stat_out.st.mode = mode;
sysio->stat_out.st.size = record->size();
sysio->stat_out.st.uid = record->uid();
sysio->stat_out.st.gid = record->gid();
sysio->stat_out.st.inode = (unsigned long)node;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
Lock::Guard guard(_lock);
Node *node = _root_node.lookup(path);
if (!node)
return false;
node = node->lookup_child(index);
if (!node) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
return true;
}
sysio->dirent_out.entry.fileno = (unsigned long)node;
Record const *record = node->record;
if (record) {
switch (record->type()) {
case 0: sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_FILE; break;
case 2: sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_SYMLINK; break;
case 5: sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_DIRECTORY; break;
default:
if (verbose)
PDBG("unhandled record type %d", record->type());
}
}
strncpy(sysio->dirent_out.entry.name,
node->name,
sizeof(sysio->dirent_out.entry.name));
return true;
}
bool unlink(Sysio *, char const *) { return false; }
bool readlink(Sysio *sysio, char const *path)
{
Node *node = _root_node.lookup(path);
Record const *record = node ? node->record : 0;
if (!record || (record->type() != Record::TYPE_SYMLINK)) {
sysio->error.readlink = Sysio::READLINK_ERR_NO_ENTRY;
return false;
}
size_t const count = min(sysio->readlink_in.bufsiz,
min(sizeof(sysio->readlink_out.chunk),
(size_t)100));
memcpy(sysio->readlink_out.chunk, record->linked_name(), count);
sysio->readlink_out.count = count;
return true;
}
bool rename(Sysio *, char const *, char const *) { return false; }
bool mkdir(Sysio *, char const *) { return false; }
bool symlink(Sysio *, char const *) { return false; }
size_t num_dirent(char const *path)
{
return _cached_num_dirent.num_dirent(path);
}
bool is_directory(char const *path)
{
Node *node = _root_node.lookup(path);
if (!node)
return false;
Record const *record = node->record;
return record ? (record->type() == Record::TYPE_DIR) : true;
}
char const *leaf_path(char const *path)
{
/*
* Check if path exists within the file system. If this is the
* case, return the whole path, which is relative to the root
* of this file system.
*/
Node *node = _root_node.lookup(path);
return node ? path : 0;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
Lock::Guard guard(_lock);
Node *node = _root_node.lookup(path);
if (node)
return new (env()->heap())
Tar_vfs_handle(this, 0, node->record);
sysio->error.open = Sysio::OPEN_ERR_UNACCESSIBLE;
return 0;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "tar"; }
/********************************
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *handle)
{
PDBG("called\n");
return false;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
{
Tar_vfs_handle const *handle = static_cast<Tar_vfs_handle *>(vfs_handle);
size_t const record_size = handle->record()->size();
size_t const record_bytes_left = record_size >= handle->seek()
? record_size - handle->seek() : 0;
size_t const count = min(record_bytes_left,
min(sizeof(sysio->read_out.chunk),
sysio->read_in.count));
char const *data = (char *)handle->record()->data() + handle->seek();
memcpy(sysio->read_out.chunk, data, count);
sysio->read_out.count = count;
return true;
}
bool ftruncate(Sysio *sysio, Vfs_handle *handle)
{
PDBG("called\n");
return false;
}
};
}
#endif /* _NOUX__TAR_FILE_SYSTEM_H_ */

8
ports/src/noux/terminal_connection.h
View File

@ -22,13 +22,9 @@
/* Noux includes */
#include <noux_session/sysio.h>
#include "file_system.h"
#include <vfs/file_system.h>
namespace Noux {
Terminal::Connection *terminal();
}
namespace Noux { Terminal::Connection *terminal(); }
#endif /* _NOUX__TERMINAL_CONNECTION_H_ */

233
ports/src/noux/terminal_file_system.h
View File

@ -1,233 +0,0 @@
/*
* \brief Terminal file system
* \author Christian Prochaska
* \date 2012-05-23
*/
/*
* Copyright (C) 2012-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__TERMINAL_FILE_SYSTEM_H_
#define _NOUX__TERMINAL_FILE_SYSTEM_H_
/* Genode includes */
#include <base/printf.h>
#include <base/lock.h>
#include <terminal_session/connection.h>
#include <util/string.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include "file_system.h"
namespace Noux {
class Terminal_file_system : public File_system
{
private:
Terminal::Session_client _terminal;
enum { FILENAME_MAX_LEN = 64 };
char _filename[FILENAME_MAX_LEN];
bool _is_root(const char *path)
{
return (strcmp(path, "") == 0) || (strcmp(path, "/") == 0);
}
bool _is_terminal_file(const char *path)
{
return (strlen(path) == (strlen(_filename) + 1)) &&
(strcmp(&path[1], _filename) == 0);
}
public:
Terminal_file_system(Xml_node config)
: _terminal(env()->parent()->session<Terminal::Session>
("ram_quota=8192, label=\"noux(terminal_fs)\""))
{
_filename[0] = 0;
try { config.attribute("name").value(_filename, sizeof(_filename)); }
catch (...) { }
/*
* Wait for connection-established signal
*/
/* create signal receiver, just for the single signal */
Signal_context sig_ctx;
Signal_receiver sig_rec;
Signal_context_capability sig_cap = sig_rec.manage(&sig_ctx);
/* register signal handler */
_terminal.connected_sigh(sig_cap);
/* wati for signal */
sig_rec.wait_for_signal();
sig_rec.dissolve(&sig_ctx);
}
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
/* not supported */
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap)
{
/* not supported */
}
bool stat(Sysio *sysio, char const *path)
{
Sysio::Stat st = { 0, 0, 0, 0, 0, 0 };
if (_is_root(path))
st.mode = Sysio::STAT_MODE_DIRECTORY;
else if (_is_terminal_file(path)) {
st.mode = Sysio::STAT_MODE_CHARDEV;
} else {
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
return false;
}
sysio->stat_out.st = st;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
if (_is_root(path)) {
if (index == 0) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_CHARDEV;
strncpy(sysio->dirent_out.entry.name,
_filename,
sizeof(sysio->dirent_out.entry.name));
} else {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
}
return true;
}
return false;
}
size_t num_dirent(char const *path)
{
if (_is_root(path))
return 1;
else
return 0;
}
bool is_directory(char const *path)
{
if (_is_root(path))
return true;
return false;
}
char const *leaf_path(char const *path)
{
return path;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
if (!_is_terminal_file(path)) {
sysio->error.open = Sysio::OPEN_ERR_UNACCESSIBLE;
return 0;
}
return new (env()->heap()) Vfs_handle(this, this, 0);
}
bool unlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool readlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
/* not supported */
return false;
}
bool mkdir(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "terminal"; }
/********************************
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *handle)
{
sysio->write_out.count = _terminal.write(sysio->write_in.chunk, sysio->write_in.count);
return true;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
{
sysio->read_out.count = _terminal.read(sysio->read_out.chunk, sysio->read_in.count);
return true;
}
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) { return true; }
bool check_unblock(Vfs_handle *vfs_handle, bool rd, bool wr, bool ex)
{
if (rd && (_terminal.avail() > 0))
return true;
if (wr)
return true;
return false;
}
void register_read_ready_sigh(Vfs_handle *vfs_handle,
Signal_context_capability sigh)
{
_terminal.read_avail_sigh(sigh);
}
};
}
#endif /* _NOUX__TERMINAL_FILE_SYSTEM_H_ */

30
ports/src/noux/terminal_io_channel.h
View File

@ -58,14 +58,20 @@ namespace Noux {
~Terminal_io_channel() { sig_rec.dissolve(this); }
bool write(Sysio *sysio, size_t &count)
bool write(Sysio *sysio, size_t &offset) override
{
terminal.write(sysio->write_in.chunk, sysio->write_in.count);
count = sysio->write_in.count;
size_t const count = min(sysio->write_in.count,
sizeof(sysio->write_in.chunk));
terminal.write(sysio->write_in.chunk, count);
sysio->write_out.count = count;
offset = count;
return true;
}
bool read(Sysio *sysio)
bool read(Sysio *sysio) override
{
if (type != STDIN) {
PERR("attempt to read from terminal output channel");
@ -114,7 +120,7 @@ namespace Noux {
return true;
}
bool fcntl(Sysio *sysio)
bool fcntl(Sysio *sysio) override
{
/**
* Actually it is "inappropiate" to use fcntl() directly on terminals
@ -136,7 +142,7 @@ namespace Noux {
return false;
}
bool fstat(Sysio *sysio)
bool fstat(Sysio *sysio) override
{
/*
* Supply stat values such that libc is happy. I.e., the libc
@ -147,7 +153,7 @@ namespace Noux {
return true;
}
bool check_unblock(bool rd, bool wr, bool ex) const
bool check_unblock(bool rd, bool wr, bool ex) const override
{
/* never block for writing */
if (wr) return true;
@ -159,11 +165,11 @@ namespace Noux {
return (rd && (type == STDIN) && !read_buffer.empty());
}
bool ioctl(Sysio *sysio)
bool ioctl(Sysio *sysio) override
{
switch (sysio->ioctl_in.request) {
case Sysio::Ioctl_in::OP_TIOCGWINSZ:
case Vfs::File_io_service::IOCTL_OP_TIOCGWINSZ:
{
Terminal::Session::Size size = terminal.size();
sysio->ioctl_out.tiocgwinsz.rows = size.lines();
@ -171,13 +177,13 @@ namespace Noux {
return true;
}
case Sysio::Ioctl_in::OP_TIOCSETAF:
case Vfs::File_io_service::IOCTL_OP_TIOCSETAF:
{
PDBG("OP_TIOCSETAF not implemented");
return false;
}
case Sysio::Ioctl_in::OP_TIOCSETAW:
case Vfs::File_io_service::IOCTL_OP_TIOCSETAW:
{
PDBG("OP_TIOCSETAW not implemented");
return false;
@ -198,7 +204,7 @@ namespace Noux {
/**
* Called by Noux main loop on the occurrence of new STDIN input
*/
void dispatch(unsigned)
void dispatch(unsigned) override
{
while ((read_buffer.avail_capacity() > 0) &&
terminal.avail()) {

111
ports/src/noux/vfs_handle.h
View File

@ -1,111 +0,0 @@
/*
* \brief Representation of an open file
* \author Norman Feske
* \date 2011-02-17
*/
/*
* Copyright (C) 2011-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__VFS_HANDLE_H_
#define _NOUX__VFS_HANDLE_H_
/* Genode includes */
#include <base/printf.h>
/* Noux includes */
#include <file_io_service.h>
#include <directory_service.h>
namespace Noux {
class Sysio;
class Vfs_io_channel;
class Vfs_handle
{
private:
Directory_service *_ds;
File_io_service *_fs;
int _status_flags;
size_t _seek;
friend class Vfs_io_channel; /* for modifying '_seek' */
static Directory_service *_pseudo_directory_service()
{
struct Pseudo_directory_service : public Directory_service
{
static bool _msg(char const *sc) {
PERR("%s not supported by directory service", sc); return false; }
Dataspace_capability dataspace(char const *)
{
_msg("dataspace");
return Dataspace_capability();
}
void release(char const *, Dataspace_capability) { }
bool stat(Sysio *, char const *) { return _msg("stat"); }
Vfs_handle *open(Sysio *, char const *) { _msg("open"); return 0; }
bool dirent(Sysio *, char const *, off_t) { return _msg("dirent"); }
bool unlink(Sysio *, char const *) { return _msg("unlink"); }
bool readlink(Sysio *, char const *) { return _msg("readlink"); }
bool rename(Sysio *, char const *, char const *) { return _msg("rename"); }
bool mkdir(Sysio *, char const *) { return _msg("mkdir"); }
bool symlink(Sysio *, char const *) { return _msg("symlink"); }
size_t num_dirent(char const *) { return 0; }
bool is_directory(char const *) { return false; }
char const *leaf_path(char const *path) { return 0; }
};
static Pseudo_directory_service ds;
return &ds;
}
static File_io_service *_pseudo_file_io_service()
{
struct Pseudo_file_io_service : public File_io_service
{
static bool _msg(char const *sc) {
PERR("%s not supported by file system", sc); return false; }
bool write(Sysio *sysio, Vfs_handle *handle) { return _msg("write"); }
bool read(Sysio *sysio, Vfs_handle *handle) { return _msg("read"); }
bool ftruncate(Sysio *sysio, Vfs_handle *handle) { return _msg("ftruncate"); }
bool ioctl(Sysio *sysio, Vfs_handle *handle) { return _msg("ioctl"); }
};
static Pseudo_file_io_service fs;
return &fs;
}
public:
enum { STATUS_RDONLY = 0, STATUS_WRONLY = 1, STATUS_RDWR = 2 };
Vfs_handle(Directory_service *ds, File_io_service *fs, int status_flags)
:
_ds(ds ? ds : _pseudo_directory_service()),
_fs(fs ? fs : _pseudo_file_io_service()),
_status_flags(status_flags),
_seek(0)
{ }
virtual ~Vfs_handle() { }
Directory_service *ds() { return _ds; }
File_io_service *fs() { return _fs; }
int status_flags() { return _status_flags; }
size_t seek() const { return _seek; }
};
}
#endif /* _NOUX__VFS_HANDLE_H_ */

100
ports/src/noux/vfs_io_channel.h
View File

@ -16,14 +16,13 @@
/* Noux includes */
#include <io_channel.h>
#include <file_system.h>
#include <dir_file_system.h>
#include <vfs/dir_file_system.h>
namespace Noux {
struct Vfs_io_channel : Io_channel, Signal_dispatcher_base
{
Vfs_handle *_fh;
Vfs::Vfs_handle *_fh;
Absolute_path _path;
Absolute_path _leaf_path;
@ -31,12 +30,12 @@ namespace Noux {
Signal_receiver &_sig_rec;
Vfs_io_channel(char const *path, char const *leaf_path,
Dir_file_system *root_dir, Vfs_handle *vfs_handle,
Vfs::Dir_file_system *root_dir, Vfs::Vfs_handle *vfs_handle,
Signal_receiver &sig_rec)
: _fh(vfs_handle), _path(path), _leaf_path(leaf_path),
_sig_rec(sig_rec)
{
_fh->fs()->register_read_ready_sigh(_fh, _sig_rec.manage(this));
_fh->fs().register_read_ready_sigh(_fh, _sig_rec.manage(this));
}
~Vfs_io_channel()
@ -45,42 +44,63 @@ namespace Noux {
destroy(env()->heap(), _fh);
}
bool write(Sysio *sysio, size_t &count)
bool write(Sysio *sysio, size_t &offset) override
{
if (!_fh->fs()->write(sysio, _fh))
return false;
size_t out_count = 0;
sysio->error.write = _fh->fs().write(_fh, sysio->write_in.chunk,
sysio->write_in.count, out_count);
if (sysio->error.write != Vfs::File_io_service::WRITE_OK)
return false;
_fh->advance_seek(out_count);
sysio->write_out.count = out_count;
offset = out_count;
count = sysio->write_out.count;
_fh->_seek += count;
return true;
}
bool read(Sysio *sysio)
bool read(Sysio *sysio) override
{
if (!_fh->fs()->read(sysio, _fh))
size_t count = min(sysio->read_in.count, sizeof(sysio->read_out.chunk));
size_t out_count = 0;
sysio->error.read = _fh->fs().read(_fh, sysio->read_out.chunk, count, out_count);
if (sysio->error.read != Vfs::File_io_service::READ_OK)
return false;
_fh->_seek += sysio->read_out.count;
sysio->read_out.count = out_count;
_fh->advance_seek(out_count);
return true;
}
bool fstat(Sysio *sysio)
bool fstat(Sysio *sysio) override
{
/*
* 'sysio.stat_in' is not used in '_fh->ds()->stat()',
* 'sysio.stat_in' is not used in '_fh->ds().stat()',
* so no 'sysio' member translation is needed here
*/
bool result = _fh->ds()->stat(sysio, _leaf_path.base());
sysio->fstat_out.st = sysio->stat_out.st;
return result;
sysio->error.stat = _fh->ds().stat(_leaf_path.base(),
sysio->fstat_out.st);
return (sysio->error.stat == Vfs::Directory_service::STAT_OK);
}
bool ftruncate(Sysio *sysio)
bool ftruncate(Sysio *sysio) override
{
return _fh->fs()->ftruncate(sysio, _fh);
sysio->error.ftruncate = _fh->fs().ftruncate(_fh, sysio->ftruncate_in.length);
return (sysio->error.ftruncate == Vfs::File_io_service::FTRUNCATE_OK);
}
bool fcntl(Sysio *sysio)
bool fcntl(Sysio *sysio) override
{
switch (sysio->fcntl_in.cmd) {
@ -103,20 +123,20 @@ namespace Noux {
* to directories). Hence, '_path' is the absolute path of the
* directory to inspect.
*/
bool dirent(Sysio *sysio)
bool dirent(Sysio *sysio) override
{
/*
* Return artificial dir entries for "." and ".."
*/
unsigned const index = _fh->seek() / sizeof(Sysio::Dirent);
if (index < 2) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_DIRECTORY;
sysio->dirent_out.entry.type = Vfs::Directory_service::DIRENT_TYPE_DIRECTORY;
strncpy(sysio->dirent_out.entry.name,
index ? ".." : ".",
sizeof(sysio->dirent_out.entry.name));
sysio->dirent_out.entry.fileno = 1;
_fh->_seek += sizeof(Sysio::Dirent);
_fh->advance_seek(sizeof(Sysio::Dirent));
return true;
}
@ -125,10 +145,11 @@ namespace Noux {
* Align index range to zero when calling the directory service.
*/
if (!_fh->ds()->dirent(sysio, _path.base(), index - 2))
if (!_fh->ds().dirent(_path.base(), index - 2,
sysio->dirent_out.entry))
return false;
_fh->_seek += sizeof(Sysio::Dirent);
_fh->advance_seek(sizeof(Sysio::Dirent));
return true;
}
@ -147,32 +168,36 @@ namespace Noux {
return 0;
}
bool ioctl(Sysio *sysio)
bool ioctl(Sysio *sysio) override
{
return _fh->fs()->ioctl(sysio, _fh);
Vfs::File_system::Ioctl_arg arg = (Vfs::File_system::Ioctl_arg)sysio->ioctl_in.argp;
sysio->error.ioctl = _fh->fs().ioctl(_fh, sysio->ioctl_in.request, arg, sysio->ioctl_out);
return (sysio->error.ioctl == Vfs::File_io_service::IOCTL_OK);
}
bool lseek(Sysio *sysio)
bool lseek(Sysio *sysio) override
{
switch (sysio->lseek_in.whence) {
case Sysio::LSEEK_SET: _fh->_seek = sysio->lseek_in.offset; break;
case Sysio::LSEEK_CUR: _fh->_seek += sysio->lseek_in.offset; break;
case Sysio::LSEEK_SET: _fh->seek(sysio->lseek_in.offset); break;
case Sysio::LSEEK_CUR: _fh->advance_seek(sysio->lseek_in.offset); break;
case Sysio::LSEEK_END:
off_t offset = sysio->lseek_in.offset;
sysio->fstat_in.fd = sysio->lseek_in.fd;
_fh->_seek = size(sysio) + offset;
_fh->seek(size(sysio) + offset);
break;
}
sysio->lseek_out.offset = _fh->_seek;
sysio->lseek_out.offset = _fh->seek();
return true;
}
bool check_unblock(bool rd, bool wr, bool ex) const
bool check_unblock(bool rd, bool wr, bool ex) const override
{
return _fh->fs()->check_unblock(_fh, rd, wr, ex);
return _fh->fs().check_unblock(_fh, rd, wr, ex);
}
bool path(char *path, size_t len)
bool path(char *path, size_t len) override
{
strncpy(path, _path.base(), len);
path[len - 1] = '\0';
@ -180,6 +205,7 @@ namespace Noux {
return true;
}
/**************************************
** Signal_dispatcher_base interface **
**************************************/
@ -187,7 +213,7 @@ namespace Noux {
/**
* Called by Noux main loop on the occurrence of new input
*/
void dispatch(unsigned)
void dispatch(unsigned) override
{
Io_channel::invoke_all_notifiers();
}

194
ports/src/noux/zero_file_system.h
View File

@ -1,194 +0,0 @@
/*
* \brief zero filesystem
* \author Josef Soentgen
* \date 2012-07-31
*/
/*
* Copyright (C) 2012-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _NOUX__ZERO_FILE_SYSTEM_H_
#define _NOUX__ZERO_FILE_SYSTEM_H_
/* Genode includes */
#include <base/printf.h>
#include <util/string.h>
/* Noux includes */
#include <noux_session/sysio.h>
#include "file_system.h"
namespace Noux {
class Zero_file_system : public File_system
{
private:
const char *_filename() { return "zero"; }
bool _is_root(const char *path)
{
return (strcmp(path, "") == 0) || (strcmp(path, "/") == 0);
}
bool _is_device_zero_file(const char *path)
{
return (strlen(path) == (strlen(_filename()) + 1)) &&
(strcmp(&path[1], _filename()) == 0);
}
public:
Zero_file_system(Xml_node) { }
/*********************************
** Directory-service interface **
*********************************/
Dataspace_capability dataspace(char const *path)
{
/* not supported */
return Dataspace_capability();
}
void release(char const *path, Dataspace_capability ds_cap)
{
/* not supported */
}
bool stat(Sysio *sysio, char const *path)
{
Sysio::Stat st = { 0, 0, 0, 0, 0, 0 };
if (_is_root(path))
st.mode = Sysio::STAT_MODE_DIRECTORY;
else if (_is_device_zero_file(path)) {
st.mode = Sysio::STAT_MODE_CHARDEV;
} else {
sysio->error.stat = Sysio::STAT_ERR_NO_ENTRY;
return false;
}
sysio->stat_out.st = st;
return true;
}
bool dirent(Sysio *sysio, char const *path, off_t index)
{
if (_is_root(path)) {
if (index == 0) {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_CHARDEV;
strncpy(sysio->dirent_out.entry.name,
_filename(),
sizeof(sysio->dirent_out.entry.name));
} else {
sysio->dirent_out.entry.type = Sysio::DIRENT_TYPE_END;
}
return true;
}
return false;
}
size_t num_dirent(char const *path)
{
if (_is_root(path))
return 1;
else
return 0;
}
bool is_directory(char const *path)
{
if (_is_root(path))
return true;
return false;
}
char const *leaf_path(char const *path)
{
return path;
}
Vfs_handle *open(Sysio *sysio, char const *path)
{
if (!_is_device_zero_file(path)) {
sysio->error.open = Sysio::OPEN_ERR_UNACCESSIBLE;
return 0;
}
return new (env()->heap()) Vfs_handle(this, this, 0);
}
bool unlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool readlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool rename(Sysio *sysio, char const *from_path, char const *to_path)
{
/* not supported */
return false;
}
bool mkdir(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
bool symlink(Sysio *sysio, char const *path)
{
/* not supported */
return false;
}
/***************************
** File_system interface **
***************************/
static char const *name() { return "zero"; }
/********************************
** File I/O service interface **
********************************/
bool write(Sysio *sysio, Vfs_handle *handle)
{
sysio->write_out.count = sysio->write_in.count;
return true;
}
bool read(Sysio *sysio, Vfs_handle *vfs_handle)
{
size_t nbytes = sysio->read_in.count;
memset(sysio->read_out.chunk, 0, nbytes);
sysio->read_out.count = nbytes;
return true;
}
bool ftruncate(Sysio *sysio, Vfs_handle *vfs_handle) { return false; }
};
}
#endif /* _NOUX__ZERO_FILE_SYSTEM_H_ */