Remove any-rom VFS plugin
The plugin does not build anymore, which will lead to errors if 'make lib/vfs' is executed and the original use-case is gone according to the plugin's author anyway. Fixes #155.
This commit is contained in:
Josef Söntgen
committed by
Norman Feske
Norman Feske
parent
498854c085
commit
da1208c159
@@ -1,274 +0,0 @@
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/*
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* \brief Any ROM filesystem
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* \author Emery Hemingway
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* \date 2015-10-28
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*/
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/*
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* Copyright (C) 2015 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#include <vfs/file_system_factory.h>
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#include <vfs/vfs_handle.h>
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#include <base/attached_rom_dataspace.h>
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#include <base/session_label.h>
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#include <util/list.h>
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namespace Vfs { class Any_rom_file_system; };
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class Vfs::Any_rom_file_system : public File_system
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{
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private:
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struct Rom : Genode::Attached_rom_dataspace, Genode::List<Rom>::Element
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{
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Genode::Session_label const _name;
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int _ref_count = 0;
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Rom(Genode::Env &env, Genode::Session_label const &rom_label )
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: Attached_rom_dataspace(env, rom_label.string()), _name(rom_label.last_element()) { }
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bool operator == (char const *other) const { return _name == other; }
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void incr() { ++_ref_count; }
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void decr() { --_ref_count; }
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bool unused() const { return _ref_count <= 0; }
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};
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class Rom_vfs_handle : public Vfs_handle
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{
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private:
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Rom &_rom;
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public:
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Rom_vfs_handle(Any_rom_file_system &fs,
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Genode::Allocator &alloc,
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Rom &rom)
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:
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Vfs_handle(fs, fs, alloc, OPEN_MODE_RDONLY),
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_rom(rom)
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{ _rom.incr(); }
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~Rom_vfs_handle() { _rom.decr(); }
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file_size read(char *buf, file_size buf_size)
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{
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file_size size = _rom.size();
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file_size offset = min(size, seek());
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file_size len = min(buf_size, (size - offset));
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memcpy(buf, _rom.local_addr<char>()+offset, len);
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return len;
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}
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};
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Genode::Env &_env;
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Genode::Allocator &_alloc;
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Genode::List<Rom> _roms;
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Genode::Session_label const _label;
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Rom *lookup(char const *filename)
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{
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using namespace Genode;
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if (*filename == '/') ++filename;
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for (Rom *rom = _roms.first(); rom; rom = rom->next()) {
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if (*rom == filename) {
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/* if the ROM dataspace is not in use, update it */
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if (rom->unused()) {
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_roms.remove(rom);
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destroy(_alloc, rom);
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/* fallthru and try again */
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} else
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return rom;
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}
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}
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try {
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Rom *rom = new (_alloc)
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Rom(_env, prefixed_label(_label, Session_label(filename)));
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_roms.insert(rom);
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return rom;
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} catch (...) { }
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return 0;
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}
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public:
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Any_rom_file_system(Genode::Env &env,
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Genode::Allocator &alloc,
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Genode::Xml_node node)
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:
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_env(env), _alloc(alloc),
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_label(node.attribute_value("label",
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Genode::String<Genode::Session_label::capacity()>()).string())
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{ }
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/*********************************
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** Directory-service interface **
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*********************************/
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file_size num_dirent(char const *path) override { return 0; }
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bool directory(char const *path) override { return false; }
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char const *leaf_path(char const *path) override {
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return lookup(path) ? path : 0; }
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Dataspace_capability dataspace(char const *path) override
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{
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if (Rom *rom = lookup(path)) {
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rom->incr();
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return rom->cap();
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}
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return Dataspace_capability();
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}
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void release(char const *path,
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Dataspace_capability ds_cap) override
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{
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if (Rom *rom = lookup(path))
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rom->decr();
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}
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Open_result open(char const *path,
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unsigned mode,
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Vfs_handle **handle,
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Genode::Allocator &alloc) override
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{
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if ((mode & OPEN_MODE_ACCMODE) != OPEN_MODE_RDONLY)
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return OPEN_ERR_NO_PERM;
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Rom *rom = lookup(path);
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if (!rom)
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return (mode & OPEN_MODE_CREATE) ?
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OPEN_ERR_NO_PERM : OPEN_ERR_UNACCESSIBLE;
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if (mode & OPEN_MODE_CREATE)
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return OPEN_ERR_EXISTS;
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*handle = new (alloc) Rom_vfs_handle(*this, alloc, *rom);
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return OPEN_OK;
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}
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void close(Vfs_handle *vfs_handle) override
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{
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Rom_vfs_handle *handle =
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static_cast<Rom_vfs_handle *>(vfs_handle);
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if (handle)
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destroy(handle->alloc(), handle);
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}
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Stat_result stat(char const *path, Stat &stat) override
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{
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stat = Stat();
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Rom *rom = lookup(path);
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if (!rom) return STAT_ERR_NO_ENTRY;
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stat.size = rom->size();
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return STAT_OK;
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}
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Dirent_result dirent(char const *, file_offset, Dirent &dirent) override {
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return DIRENT_ERR_INVALID_PATH; }
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Unlink_result unlink(char const *path)
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{
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if (Rom *rom = lookup(path)) {
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if (rom->unused()) {
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/* why not free some memory */
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_roms.remove(rom);
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destroy(_alloc, rom);
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return UNLINK_OK;
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}
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return UNLINK_ERR_NO_PERM;
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}
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return UNLINK_ERR_NO_ENTRY;
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}
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Readlink_result readlink(char const*, char*,
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file_size, file_size&) override {
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return READLINK_ERR_NO_ENTRY; }
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Rename_result rename(char const *path, char const*) override
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{
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if (lookup(path))
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return RENAME_ERR_NO_PERM;
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return RENAME_ERR_NO_ENTRY;
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}
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Symlink_result symlink(char const*, char const*) override {
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return SYMLINK_ERR_NO_PERM; }
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Mkdir_result mkdir(char const*, unsigned) override {
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return MKDIR_ERR_NO_PERM; }
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/**
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* Clean out unused ROM connections
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*/
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void sync(char const *path) override
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{
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for (Rom *rom = _roms.first(); rom;) {
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if (rom->unused()) {
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_roms.remove(rom);
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destroy(_alloc, rom);
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rom = _roms.first();
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} else {
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rom = rom->next();
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}
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}
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}
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/**********************
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** File I/O service **
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**********************/
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Write_result write(Vfs_handle*,
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char const*, file_size,
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file_size&) override {
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return WRITE_ERR_INVALID; }
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Read_result read(Vfs_handle *vfs_handle,
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char *buf, file_size buf_size,
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file_size &out) override
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{
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Rom_vfs_handle *handle =
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static_cast<Rom_vfs_handle *>(vfs_handle);
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if (handle) {
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out = handle->read(buf, buf_size);
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return READ_OK;
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} else {
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out = 0;
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return READ_ERR_INVALID;
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}
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}
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Ftruncate_result ftruncate(Vfs_handle *, file_size) override {
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return FTRUNCATE_ERR_NO_PERM; }
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};
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extern "C" Vfs::File_system_factory *vfs_file_system_factory(void)
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{
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struct Any_rom_factory : Vfs::File_system_factory
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{
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Vfs::File_system *create(Genode::Env &env,
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Genode::Allocator &alloc,
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Genode::Xml_node node) override
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{
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return new (alloc) Vfs::Any_rom_file_system(env, alloc, node);
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}
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};
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static Any_rom_factory factory;
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return &factory;
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}
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@@ -1,4 +0,0 @@
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TARGET = any-rom_plugin
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LIBS = vfs_any-rom
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CC_CXX_WARN_STRICT =
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