616352b840
Mount all file system with 'noatime' option because it is hardly useful if there is no proper base period. Issue #2558.
114 lines
2.6 KiB
C++
114 lines
2.6 KiB
C++
/*
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* \brief Rump initialization
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* \author Sebastian Sumpf
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* \date 2014-01-17
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*/
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/*
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* Copyright (C) 2014-2017 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 Affero General Public License version 3.
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*/
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#include "file_system.h"
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#include <rump/env.h>
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#include <rump_fs/fs.h>
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#include <util/string.h>
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#include <util/hard_context.h>
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#include <base/log.h>
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#include <base/attached_rom_dataspace.h>
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/**
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* We define our own fs arg structure to fit all sizes, we assume that 'fspec'
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* is the only valid argument and all other fields are unused.
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*/
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struct fs_args
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{
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char *fspec;
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char pad[150];
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fs_args() { Genode::memset(pad, 0, sizeof(pad)); }
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};
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namespace File_system { class Sync; };
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static char const *fs_types[] = { RUMP_MOUNT_CD9660, RUMP_MOUNT_EXT2FS,
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RUMP_MOUNT_FFS, RUMP_MOUNT_MSDOS,
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RUMP_MOUNT_NTFS, RUMP_MOUNT_UDF, 0 };
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typedef Genode::String<16> Fs_type;
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static bool _supports_symlinks;
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static bool _check_type(Fs_type const &type)
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{
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for (int i = 0; fs_types[i]; i++)
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if (!Genode::strcmp(type.string(), fs_types[i]))
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return true;
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return false;
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}
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static void _print_types()
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{
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Genode::error("fs types:");
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for (int i = 0; fs_types[i]; ++i)
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Genode::error("\t", fs_types[i]);
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}
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static bool check_symlinks(Fs_type const &fs_type)
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{
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return (fs_type == RUMP_MOUNT_EXT2FS)
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|| (fs_type == RUMP_MOUNT_FFS);
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}
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static bool check_read_only(Fs_type const &fs_type)
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{
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return fs_type == RUMP_MOUNT_CD9660;
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}
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void File_system::init()
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{
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Fs_type const fs_type = Rump::env().config_rom().xml().attribute_value("fs", Fs_type());
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if (!_check_type(fs_type)) {
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Genode::error("Invalid or no file system given (use \'<config fs=\"<fs type>\"/>)");
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_print_types();
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throw Genode::Exception();
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}
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Genode::log("Using ", fs_type, " as file system");
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/* start rump kernel */
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rump_init();
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/* register block device */
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rump_pub_etfs_register(GENODE_DEVICE, GENODE_BLOCK_SESSION, RUMP_ETFS_BLK);
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/* mount into extra-terrestrial-file system */
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struct fs_args args;
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int opts = check_read_only(fs_type) ? RUMP_MNT_RDONLY : 0;
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/* disable access time updates */
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opts |= RUMP_MNT_NOATIME;
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args.fspec = (char *)GENODE_DEVICE;
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if (rump_sys_mount(fs_type.string(), "/", opts, &args, sizeof(args)) == -1) {
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Genode::error("Mounting '", fs_type, "' file system failed (errno ", errno, " )");
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throw Genode::Exception();
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}
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/* check support for symlinks */
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_supports_symlinks = check_symlinks(fs_type);
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}
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bool File_system::supports_symlinks() { return _supports_symlinks; }
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