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VirtualFileSystem class builds inside Kernel.

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This commit is contained in:
Andreas Kling 2018-10-17 11:40:58 +02:00
parent 9171521752
commit d2425495ca
Notes: sideshowbarker 2024-07-19 18:47:12 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/d2425495ca7
8 changed files with 147 additions and 97 deletions
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7
AK/ktime.h
View file

@ -1,12 +1,7 @@
#pragma once
#ifdef SERENITY_KERNEL
inline time_t time(time_t* tloc)
{
if (tloc)
*tloc = 123;
return 123;
}
#include <Kernel/ktime.h>
#else
#include <time.h>
#define ktime time

3
Kernel/Makefile
View file

@ -28,7 +28,8 @@ VFS_OBJS = \
../VirtualFileSystem/RandomDevice.o \
../VirtualFileSystem/FileSystem.o \
../VirtualFileSystem/DiskBackedFileSystem.o \
../VirtualFileSystem/Ext2FileSystem.o
../VirtualFileSystem/Ext2FileSystem.o \
../VirtualFileSystem/VirtualFileSystem.o
AK_OBJS = \
../AK/String.o \

172
Kernel/VGA.cpp
View file

@ -11,55 +11,50 @@ PRIVATE BYTE current_attr = 0x07;
PRIVATE volatile WORD soft_cursor;
PRIVATE void print_num( DWORD );
PRIVATE void print_hex( DWORD, BYTE fields );
static void printSignedNumber(int);
template<typename PutChFunc> static int printNumber(PutChFunc, char*&, DWORD);
template<typename PutChFunc> static int printHex(PutChFunc, char*&, DWORD, BYTE fields);
template<typename PutChFunc> static int printSignedNumber(PutChFunc, char*&, int);
PRIVATE void
putch( char ch )
static void vga_putch(char*, char ch)
{
WORD row;
switch( ch )
{
case '\n':
row = soft_cursor / 80;
if( row == 23 )
{
memcpy( vga_mem, vga_mem + 160, 160 * 23 );
memset( vga_mem + (160 * 23), 0, 160 );
soft_cursor = row * 80;
}
else
soft_cursor = (row + 1) * 80;
return;
default:
vga_mem[soft_cursor * 2] = ch;
vga_mem[soft_cursor * 2 + 1] = current_attr;
soft_cursor++;
switch (ch) {
case '\n':
row = soft_cursor / 80;
if (row == 23) {
memcpy( vga_mem, vga_mem + 160, 160 * 23 );
memset( vga_mem + (160 * 23), 0, 160 );
soft_cursor = row * 80;
} else {
soft_cursor = (row + 1) * 80;
}
return;
default:
vga_mem[soft_cursor * 2] = ch;
vga_mem[soft_cursor * 2 + 1] = current_attr;
++soft_cursor;
}
row = soft_cursor / 80;
if ((row >= 24 && current->handle() != IPC::Handle::PanelTask)) {
memcpy( vga_mem, vga_mem + 160, 160 * 23 );
memset( vga_mem + (160 * 23), 0, 160 );
memcpy(vga_mem, vga_mem + 160, 160 * 23);
memset(vga_mem + (160 * 23), 0, 160);
soft_cursor = 23 * 80;
}
}
PUBLIC void
kprintf( const char *fmt, ... )
template<typename PutChFunc>
int kprintfInternal(PutChFunc putch, char* buffer, const char*& fmt, char*& ap)
{
const char *p;
va_list ap;
soft_cursor = vga_get_cursor();
va_start( ap, fmt );
int ret = 0;
char* bufptr = buffer;
for( p = fmt; *p; ++p )
{
if( *p == '%' && *(p + 1) )
{
for (p = fmt; *p; ++p) {
if (*p == '%' && *(p + 1)) {
++p;
switch( *p )
{
@ -68,105 +63,136 @@ kprintf( const char *fmt, ... )
const char* sp = va_arg(ap, const char*);
//ASSERT(sp != nullptr);
if (!sp) {
putch('<');
putch('N');
putch('u');
putch('L');
putch('>');
putch(bufptr, '<');
putch(bufptr, 'N');
putch(bufptr, 'u');
putch(bufptr, 'L');
putch(bufptr, '>');
ret += 5;
} else {
for (; *sp; ++sp)
putch(*sp);
for (; *sp; ++sp) {
putch(bufptr, *sp);
++ret;
}
}
}
break;
case 'd':
printSignedNumber(va_arg(ap, int));
ret += printSignedNumber(putch, bufptr, va_arg(ap, int));
break;
case 'u':
print_num( va_arg( ap, DWORD ));
ret += printNumber(putch, bufptr, va_arg(ap, DWORD));
break;
case 'x':
print_hex( va_arg( ap, DWORD ), 8 );
ret += printHex(putch, bufptr, va_arg(ap, DWORD), 8);
break;
case 'b':
print_hex( va_arg( ap, int ), 2 );
ret += printHex(putch, bufptr, va_arg(ap, int), 2);
break;
case 'c':
putch( (char)va_arg( ap, int ));
putch(bufptr, (char)va_arg(ap, int));
++ret;
break;
case 'p':
putch( '0' );
putch( 'x' );
print_hex( va_arg( ap, DWORD ), 8 );
putch(bufptr, '0');
putch(bufptr, 'x');
ret += 2;
ret += printHex(putch, bufptr, va_arg(ap, DWORD), 8);
break;
}
}
else
{
putch( *p );
else {
putch(bufptr, *p);
++ret;
}
}
/* va_arg( ap, type ); */
va_end( ap );
vga_set_cursor( soft_cursor );
return ret;
}
PRIVATE void
print_hex( DWORD number, BYTE fields )
int kprintf(const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
soft_cursor = vga_get_cursor();
int ret = kprintfInternal(vga_putch, nullptr, fmt, ap);
vga_set_cursor(soft_cursor);
va_end(ap);
return ret;
}
static void buffer_putch(char* bufptr, char ch)
{
*bufptr++ = ch;
}
int ksprintf(char* buffer, const char* fmt, ...)
{
va_list ap;
va_start(ap, fmt);
int ret = kprintfInternal(buffer_putch, buffer, fmt, ap);
va_end(ap);
return ret;
}
template<typename PutChFunc>
int printHex(PutChFunc putch, char*& bufptr, DWORD number, BYTE fields)
{
static const char h[] = {
'0','1','2','3','4','5','6','7',
'8','9','a','b','c','d','e','f'
};
int ret = 0;
BYTE shr_count = fields * 4;
while( shr_count )
{
while (shr_count) {
shr_count -= 4;
putch( h[(number >> shr_count) & 0x0F] );
putch(bufptr, h[(number >> shr_count) & 0x0F]);
++ret;
}
return ret;
}
PRIVATE void
print_num( DWORD number )
template<typename PutChFunc>
int printNumber(PutChFunc putch, char*& bufptr, DWORD number)
{
DWORD divisor = 1000000000;
char ch;
char padding = 1;
int ret = 0;
for( ;; )
{
for (;;) {
ch = '0' + (number / divisor);
number %= divisor;
if( ch != '0' )
if (ch != '0')
padding = 0;
if( !padding || divisor == 1 )
putch( ch );
if (!padding || divisor == 1) {
putch(bufptr, ch);
++ret;
}
if( divisor == 1 )
if (divisor == 1)
break;
divisor /= 10;
}
return ret;
}
static void printSignedNumber(int number)
template<typename PutChFunc>
static int printSignedNumber(PutChFunc putch, char*& bufptr, int number)
{
if (number < 0) {
putch('-');
print_num(0 - number);
} else {
print_num(number);
putch(bufptr, '-');
return printNumber(putch, bufptr, 0 - number) + 1;
}
return printNumber(putch, bufptr, number);
}
PUBLIC void

4
Kernel/VGA.h
View file

@ -8,4 +8,6 @@ void vga_set_attr(BYTE);
void vga_set_cursor(WORD);
void vga_set_cursor(BYTE row, BYTE column);
WORD vga_get_cursor();
void kprintf(const char *fmt, ...);
int kprintf(const char *fmt, ...);
int ksprintf(char* buf, const char *fmt, ...);

26
Kernel/ktime.h Normal file
View file

@ -0,0 +1,26 @@
#pragma once
struct tm {
int tm_sec; /* Seconds (0-60) */
int tm_min; /* Minutes (0-59) */
int tm_hour; /* Hours (0-23) */
int tm_mday; /* Day of the month (1-31) */
int tm_mon; /* Month (0-11) */
int tm_year; /* Year - 1900 */
int tm_wday; /* Day of the week (0-6, Sunday = 0) */
int tm_yday; /* Day in the year (0-365, 1 Jan = 0) */
int tm_isdst; /* Daylight saving time */
};
inline time_t ktime(time_t* tloc)
{
if (tloc)
*tloc = 123;
return 123;
}
inline tm* klocaltime(time_t* t)
{
static tm timmy;
return &timmy;
}

2
VirtualFileSystem/Ext2FileSystem.cpp
View file

@ -948,7 +948,7 @@ InodeIdentifier Ext2FileSystem::createInode(InodeIdentifier parentInode, const S
else
initialLinksCount = 1;
auto timestamp = time(nullptr);
auto timestamp = ktime(nullptr);
auto e2inode = make<ext2_inode>();
memset(e2inode.ptr(), 0, sizeof(ext2_inode));
e2inode->i_mode = mode;

2
VirtualFileSystem/UnixTypes.h
View file

@ -24,7 +24,7 @@ typedef signed_qword off_t;
typedef dword blksize_t;
typedef dword blkcnt_t;
typedef long int time_t;
typedef unsigned int time_t;
typedef dword size_t;
typedef signed_dword ssize_t;

28
VirtualFileSystem/VirtualFileSystem.cpp
View file

@ -81,8 +81,8 @@ bool VirtualFileSystem::mount(RetainPtr<FileSystem>&& fileSystem, const String&
kprintf("mounting %s{%p} at %s (inode: %u)\n", fileSystem->className(), fileSystem.ptr(), path.characters(), inode.index());
// FIXME: check that this is not already a mount point
auto mount = make<Mount>(inode, std::move(fileSystem));
m_mounts.append(std::move(mount));
auto mount = make<Mount>(inode, move(fileSystem));
m_mounts.append(move(mount));
return true;
}
@ -93,7 +93,7 @@ bool VirtualFileSystem::mountRoot(RetainPtr<FileSystem>&& fileSystem)
return false;
}
auto mount = make<Mount>(InodeIdentifier(), std::move(fileSystem));
auto mount = make<Mount>(InodeIdentifier(), move(fileSystem));
auto node = makeNode(mount->guest());
if (!node->inUse()) {
@ -105,13 +105,13 @@ bool VirtualFileSystem::mountRoot(RetainPtr<FileSystem>&& fileSystem)
return false;
}
m_rootNode = std::move(node);
m_rootNode = move(node);
kprintf("[VFS] mountRoot mounted %s{%p}\n",
m_rootNode->fileSystem()->className(),
m_rootNode->fileSystem());
m_mounts.append(std::move(mount));
m_mounts.append(move(mount));
return true;
}
@ -136,7 +136,7 @@ void VirtualFileSystem::freeNode(Node* node)
node->inode.fileSystem()->release();
node->inode = InodeIdentifier();
node->m_characterDevice = nullptr;
m_nodeFreeList.append(std::move(node));
m_nodeFreeList.append(move(node));
}
bool VirtualFileSystem::isDirectory(const String& path)
@ -260,14 +260,14 @@ void VirtualFileSystem::listDirectory(const String& path)
if (metadata.isCharacterDevice() || metadata.isBlockDevice()) {
char buf[16];
sprintf(buf, "%u, %u", metadata.majorDevice, metadata.minorDevice);
ksprintf(buf, "%u, %u", metadata.majorDevice, metadata.minorDevice);
kprintf("%12s ", buf);
} else {
kprintf("%12lld ", metadata.size);
}
kprintf("\033[30;1m");
auto tm = *localtime(&metadata.mtime);
auto tm = *klocaltime(&metadata.mtime);
kprintf("%04u-%02u-%02u %02u:%02u:%02u ",
tm.tm_year + 1900,
tm.tm_mon + 1,
@ -306,7 +306,7 @@ void VirtualFileSystem::listDirectoryRecursively(const String& path)
if (metadata.isDirectory()) {
if (entry.name != "." && entry.name != "..") {
char buf[4096];
sprintf(buf, "%s/%s", path.characters(), entry.name.characters());
ksprintf(buf, "%s/%s", path.characters(), entry.name.characters());
listDirectoryRecursively(buf);
}
} else {
@ -320,7 +320,7 @@ bool VirtualFileSystem::touch(const String& path)
auto inode = resolvePath(path);
if (!inode.isValid())
return false;
return inode.fileSystem()->setModificationTime(inode, time(nullptr));
return inode.fileSystem()->setModificationTime(inode, ktime(nullptr));
}
OwnPtr<FileHandle> VirtualFileSystem::open(const String& path)
@ -331,7 +331,7 @@ OwnPtr<FileHandle> VirtualFileSystem::open(const String& path)
auto vnode = getOrCreateNode(inode);
if (!vnode)
return nullptr;
return make<FileHandle>(std::move(vnode));
return make<FileHandle>(move(vnode));
}
OwnPtr<FileHandle> VirtualFileSystem::create(const String& path)
@ -354,7 +354,7 @@ InodeIdentifier VirtualFileSystem::resolveSymbolicLink(const String& basePath, I
if (!symlinkContents)
return { };
char buf[4096];
sprintf(buf, "/%s/%s", basePath.characters(), String((const char*)symlinkContents.pointer(), symlinkContents.size()).characters());
ksprintf(buf, "/%s/%s", basePath.characters(), String((const char*)symlinkContents.pointer(), symlinkContents.size()).characters());
return resolvePath(buf);
}
@ -407,7 +407,7 @@ InodeIdentifier VirtualFileSystem::resolvePath(const String& path)
char buf[4096] = "";
char* p = buf;
for (unsigned j = 0; j < i; ++j) {
p += sprintf(p, "/%s", parts[j].characters());
p += ksprintf(p, "/%s", parts[j].characters());
}
inode = resolveSymbolicLink(buf, inode);
if (!inode.isValid()) {
@ -436,7 +436,7 @@ void VirtualFileSystem::Node::release()
VirtualFileSystem::Mount::Mount(InodeIdentifier host, RetainPtr<FileSystem>&& guestFileSystem)
: m_host(host)
, m_guest(guestFileSystem->rootInode())
, m_fileSystem(std::move(guestFileSystem))
, m_fileSystem(move(guestFileSystem))
{
}