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Kernel: Fix all broken locks from new mutexes

This commit is contained in:
Bananymous 2024-02-28 22:39:02 +02:00
parent 1971813336
commit d94f6388b7
66 changed files with 681 additions and 647 deletions
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1
LibELF/LibELF/ELF.cpp
View File

@ -4,7 +4,6 @@
#ifdef __is_kernel
#include <kernel/FS/VirtualFileSystem.h>
#include <kernel/Memory/PageTableScope.h>
#include <kernel/Process.h>
#endif

13
LibELF/LibELF/LoadableELF.cpp
View File

@ -1,7 +1,7 @@
#include <BAN/ScopeGuard.h>
#include <kernel/CriticalScope.h>
#include <kernel/Memory/Heap.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <LibELF/LoadableELF.h>
#include <LibELF/Values.h>
@ -282,10 +282,6 @@ namespace LibELF
elf->reserve_address_space();
ASSERT(&PageTable::current() == &m_page_table);
LockGuard _(m_page_table);
ASSERT(m_page_table.is_page_free(0));
for (const auto& program_header : m_program_headers)
{
switch (program_header.p_type)
@ -315,12 +311,9 @@ namespace LibELF
if (paddr == 0)
return BAN::Error::from_errno(ENOMEM);
{
CriticalScope _;
PageTable::map_fast_page(paddr);
PageTable::with_fast_page(paddr, [&] {
memcpy(PageTable::fast_page_as_ptr(), (void*)(start + i * PAGE_SIZE), PAGE_SIZE);
PageTable::unmap_fast_page();
}
});
new_page_table.map_page_at(paddr, start + i * PAGE_SIZE, flags);
elf->m_physical_page_count++;

2
kernel/CMakeLists.txt
View File

@ -42,6 +42,7 @@ set(KERNEL_SOURCES
kernel/Input/PS2/Mouse.cpp
kernel/InterruptController.cpp
kernel/kernel.cpp
kernel/Lock/SpinLock.cpp
kernel/Memory/DMARegion.cpp
kernel/Memory/FileBackedRegion.cpp
kernel/Memory/Heap.cpp
@ -68,7 +69,6 @@ set(KERNEL_SOURCES
kernel/Random.cpp
kernel/Scheduler.cpp
kernel/Semaphore.cpp
kernel/SpinLock.cpp
kernel/SSP.cpp
kernel/Storage/ATA/AHCI/Controller.cpp
kernel/Storage/ATA/AHCI/Device.cpp

28
kernel/arch/x86_64/PageTable.cpp
View File

@ -1,7 +1,7 @@
#include <kernel/Arch.h>
#include <kernel/CPUID.h>
#include <kernel/InterruptController.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/SpinLock.h>
#include <kernel/Memory/kmalloc.h>
#include <kernel/Memory/PageTable.h>
@ -17,6 +17,8 @@ extern uint8_t g_userspace_end[];
namespace Kernel
{
SpinLock PageTable::s_fast_page_lock;
static PageTable* s_kernel = nullptr;
static PageTable* s_current = nullptr;
static bool s_has_nxe = false;
@ -250,7 +252,7 @@ namespace Kernel
BAN::ErrorOr<PageTable*> PageTable::create_userspace()
{
LockGuard _(s_kernel->m_lock);
SpinLockGuard _(s_kernel->m_lock);
PageTable* page_table = new PageTable;
if (page_table == nullptr)
return BAN::Error::from_errno(ENOMEM);
@ -331,7 +333,7 @@ namespace Kernel
uint64_t pde = (uc_vaddr >> 21) & 0x1FF;
uint64_t pte = (uc_vaddr >> 12) & 0x1FF;
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
if (is_page_free(vaddr))
{
@ -353,7 +355,7 @@ namespace Kernel
vaddr_t s_page = vaddr / PAGE_SIZE;
vaddr_t e_page = BAN::Math::div_round_up<vaddr_t>(vaddr + size, PAGE_SIZE);
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (vaddr_t page = s_page; page < e_page; page++)
unmap_page(page * PAGE_SIZE);
}
@ -392,7 +394,7 @@ namespace Kernel
// NOTE: we add present here, since it has to be available in higher level structures
flags_t uwr_flags = (flags & (Flags::UserSupervisor | Flags::ReadWrite)) | Flags::Present;
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
uint64_t* pml4 = (uint64_t*)P2V(m_highest_paging_struct);
if ((pml4[pml4e] & uwr_flags) != uwr_flags)
@ -437,7 +439,7 @@ namespace Kernel
size_t page_count = range_page_count(vaddr, size);
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (size_t page = 0; page < page_count; page++)
map_page_at(paddr + page * PAGE_SIZE, vaddr + page * PAGE_SIZE, flags);
}
@ -454,7 +456,7 @@ namespace Kernel
uint64_t pde = (uc_vaddr >> 21) & 0x1FF;
uint64_t pte = (uc_vaddr >> 12) & 0x1FF;
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
uint64_t* pml4 = (uint64_t*)P2V(m_highest_paging_struct);
if (!(pml4[pml4e] & Flags::Present))
@ -488,7 +490,7 @@ namespace Kernel
bool PageTable::reserve_page(vaddr_t vaddr, bool only_free)
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
ASSERT(vaddr % PAGE_SIZE == 0);
if (only_free && !is_page_free(vaddr))
return false;
@ -502,7 +504,7 @@ namespace Kernel
bytes += PAGE_SIZE - rem;
ASSERT(vaddr % PAGE_SIZE == 0);
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
if (only_free && !is_range_free(vaddr, bytes))
return false;
for (size_t offset = 0; offset < bytes; offset += PAGE_SIZE)
@ -534,7 +536,7 @@ namespace Kernel
const uint16_t e_pde = (uc_vaddr_end >> 21) & 0x1FF;
const uint16_t e_pte = (uc_vaddr_end >> 12) & 0x1FF;
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
// Try to find free page that can be mapped without
// allocations (page table with unused entries)
@ -607,7 +609,7 @@ namespace Kernel
ASSERT(is_canonical(first_address));
ASSERT(is_canonical(last_address));
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (vaddr_t vaddr = first_address; vaddr < last_address;)
{
@ -648,7 +650,7 @@ namespace Kernel
vaddr_t s_page = vaddr / PAGE_SIZE;
vaddr_t e_page = BAN::Math::div_round_up<vaddr_t>(vaddr + size, PAGE_SIZE);
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (vaddr_t page = s_page; page < e_page; page++)
if (!is_page_free(page * PAGE_SIZE))
return false;
@ -671,7 +673,7 @@ namespace Kernel
void PageTable::debug_dump()
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
flags_t flags = 0;
vaddr_t start = 0;

17
kernel/icxxabi.cpp
View File

@ -1,6 +1,5 @@
#include <kernel/LockGuard.h>
#include <BAN/Atomic.h>
#include <kernel/Panic.h>
#include <kernel/SpinLock.h>
#define ATEXIT_MAX_FUNCS 128
@ -115,22 +114,18 @@ void __cxa_finalize(void *f)
namespace __cxxabiv1
{
/* guard variables */
static Kernel::SpinLock s_spin_lock;
/* The ABI requires a 64-bit type. */
__extension__ typedef int __guard __attribute__((mode(__DI__)));
using __guard = uint64_t;
int __cxa_guard_acquire (__guard* g)
{
Kernel::LockGuard lock_guard(s_spin_lock);
return !*(int*)g;
auto& atomic = *reinterpret_cast<BAN::Atomic<__guard>*>(g);
return atomic == 0;
}
void __cxa_guard_release (__guard* g)
{
Kernel::LockGuard lock_guard(s_spin_lock);
*(int*)g = 1;
auto& atomic = *reinterpret_cast<BAN::Atomic<__guard>*>(g);
atomic = 1;
}
void __cxa_guard_abort (__guard*)

17
kernel/include/kernel/Debug.h
View File

@ -1,32 +1,30 @@
#pragma once
#include <BAN/Formatter.h>
#include <kernel/Lock/SpinLock.h>
#define dprintln(...) \
do { \
Debug::DebugLock::lock(); \
Kernel::SpinLockGuard _(Debug::s_debug_lock); \
Debug::print_prefix(__FILE__, __LINE__); \
BAN::Formatter::print(Debug::putchar, __VA_ARGS__); \
BAN::Formatter::print(Debug::putchar, "\r\n"); \
Debug::DebugLock::unlock(); \
} while(false)
#define dwarnln(...) \
do { \
Debug::DebugLock::lock(); \
Kernel::SpinLockGuard _(Debug::s_debug_lock); \
BAN::Formatter::print(Debug::putchar, "\e[33m"); \
dprintln(__VA_ARGS__); \
BAN::Formatter::print(Debug::putchar, "\e[m"); \
Debug::DebugLock::unlock(); \
} while(false)
#define derrorln(...) \
do { \
Debug::DebugLock::lock(); \
Kernel::SpinLockGuard _(Debug::s_debug_lock); \
BAN::Formatter::print(Debug::putchar, "\e[31m"); \
dprintln(__VA_ARGS__); \
BAN::Formatter::print(Debug::putchar, "\e[m"); \
Debug::DebugLock::unlock(); \
} while(false)
#define dprintln_if(cond, ...) \
@ -55,10 +53,5 @@ namespace Debug
void putchar(char);
void print_prefix(const char*, int);
class DebugLock
{
public:
static void lock();
static void unlock();
};
extern Kernel::RecursiveSpinLock s_debug_lock;
}

3
kernel/include/kernel/FS/DevFS/FileSystem.h
View File

@ -3,6 +3,7 @@
#include <BAN/Vector.h>
#include <kernel/Device/Device.h>
#include <kernel/FS/TmpFS/FileSystem.h>
#include <kernel/Lock/Mutex.h>
#include <kernel/Semaphore.h>
namespace Kernel
@ -29,7 +30,7 @@ namespace Kernel
{ }
private:
mutable SpinLock m_device_lock;
mutable Mutex m_device_lock;
BAN::Vector<BAN::RefPtr<Device>> m_devices;

2
kernel/include/kernel/FS/Ext2/FileSystem.h
View File

@ -106,7 +106,7 @@ namespace Kernel
};
private:
RecursiveSpinLock m_lock;
Mutex m_mutex;
BAN::RefPtr<BlockDevice> m_block_device;

5
kernel/include/kernel/FS/Inode.h
View File

@ -9,7 +9,8 @@
#include <kernel/API/DirectoryEntry.h>
#include <kernel/Credentials.h>
#include <kernel/SpinLock.h>
#include <kernel/Debug.h>
#include <kernel/Lock/Mutex.h>
#include <sys/socket.h>
#include <sys/types.h>
@ -157,7 +158,7 @@ namespace Kernel
virtual BAN::ErrorOr<long> ioctl_impl(int request, void* arg) { return BAN::Error::from_errno(ENOTSUP); }
protected:
mutable RecursivePrioritySpinLock m_lock;
mutable PriorityMutex m_mutex;
private:
BAN::WeakPtr<SharedFileData> m_shared_region;

1
kernel/include/kernel/FS/Pipe.h
View File

@ -2,7 +2,6 @@
#include <kernel/FS/Inode.h>
#include <kernel/Semaphore.h>
#include <kernel/SpinLock.h>
namespace Kernel
{

9
kernel/include/kernel/FS/TmpFS/FileSystem.h
View File

@ -4,9 +4,8 @@
#include <BAN/Iteration.h>
#include <kernel/FS/FileSystem.h>
#include <kernel/FS/TmpFS/Inode.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Memory/PageTable.h>
#include <kernel/SpinLock.h>
namespace Kernel
{
@ -119,7 +118,7 @@ namespace Kernel
private:
const dev_t m_rdev;
RecursiveSpinLock m_lock;
Mutex m_mutex;
BAN::HashMap<ino_t, BAN::RefPtr<TmpInode>> m_inode_cache;
BAN::RefPtr<TmpDirectoryInode> m_root_inode;
@ -155,7 +154,7 @@ namespace Kernel
template<TmpFuncs::with_block_buffer_callback F>
void TmpFileSystem::with_block_buffer(size_t index, F callback)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
paddr_t block_paddr = find_block(index);
PageTable::with_fast_page(block_paddr, [&] {
BAN::ByteSpan buffer(reinterpret_cast<uint8_t*>(PageTable::fast_page()), PAGE_SIZE);
@ -166,7 +165,7 @@ namespace Kernel
template<TmpFuncs::for_each_inode_callback F>
void TmpFileSystem::for_each_inode(F callback)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
for (auto& [_, inode] : m_inode_cache)
{
switch (callback(inode))

4
kernel/include/kernel/FS/VirtualFileSystem.h
View File

@ -3,7 +3,7 @@
#include <BAN/String.h>
#include <BAN/Vector.h>
#include <kernel/FS/FileSystem.h>
#include <kernel/SpinLock.h>
#include <kernel/Lock/Mutex.h>
namespace Kernel
{
@ -42,7 +42,7 @@ namespace Kernel
MountPoint* mount_from_root_inode(BAN::RefPtr<Inode>);
private:
SpinLock m_lock;
Mutex m_mutex;
FileSystem* m_root_fs = nullptr;
BAN::Vector<MountPoint> m_mount_points;
};

4
kernel/include/kernel/Input/PS2/Controller.h
View File

@ -5,7 +5,7 @@
#include <kernel/Device/Device.h>
#include <kernel/Input/PS2/Config.h>
#include <kernel/InterruptController.h>
#include <kernel/SpinLock.h>
#include <kernel/Lock/Mutex.h>
namespace Kernel::Input
{
@ -60,7 +60,7 @@ namespace Kernel::Input
private:
BAN::RefPtr<PS2Device> m_devices[2];
RecursiveSpinLock m_lock;
Mutex m_mutex;
BAN::CircularQueue<Command, 128> m_command_queue;
uint64_t m_command_send_time { 0 };

7
kernel/include/kernel/InterruptController.h
View File

@ -51,6 +51,11 @@ namespace Kernel
bool m_using_apic { false };
};
bool interrupts_enabled();
inline bool interrupts_enabled()
{
uintptr_t flags;
asm volatile("pushf; pop %0" : "=r"(flags) :: "memory");
return flags & (1 << 9);
}
}

0
kernel/include/kernel/LockGuard.h → kernel/include/kernel/Lock/LockGuard.h
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131
kernel/include/kernel/Lock/Mutex.h Normal file
View File

@ -0,0 +1,131 @@
#pragma once
#include <BAN/Atomic.h>
#include <BAN/NoCopyMove.h>
#include <kernel/Scheduler.h>
#include <sys/types.h>
namespace Kernel
{
class Mutex
{
BAN_NON_COPYABLE(Mutex);
BAN_NON_MOVABLE(Mutex);
public:
Mutex() = default;
void lock()
{
auto tid = Scheduler::current_tid();
if (tid == m_locker)
ASSERT_GT(m_lock_depth, 0);
else
{
while (!m_locker.compare_exchange(-1, tid))
Scheduler::get().reschedule();
ASSERT_EQ(m_lock_depth, 0);
}
m_lock_depth++;
}
bool try_lock()
{
auto tid = Scheduler::current_tid();
if (tid == m_locker)
ASSERT_GT(m_lock_depth, 0);
else
{
if (!m_locker.compare_exchange(-1, tid))
return false;
ASSERT_EQ(m_lock_depth, 0);
}
m_lock_depth++;
}
void unlock()
{
ASSERT_EQ(m_locker.load(), Scheduler::current_tid());
ASSERT_GT(m_lock_depth, 0);
if (--m_lock_depth == 0)
m_locker = -1;
}
pid_t locker() const { return m_locker; }
bool is_locked() const { return m_locker != -1; }
uint32_t lock_depth() const { return m_lock_depth; }
private:
BAN::Atomic<pid_t> m_locker { -1 };
uint32_t m_lock_depth { 0 };
};
class PriorityMutex
{
BAN_NON_COPYABLE(PriorityMutex);
BAN_NON_MOVABLE(PriorityMutex);
public:
PriorityMutex() = default;
void lock()
{
auto tid = Scheduler::current_tid();
if (tid == m_locker)
ASSERT_GT(m_lock_depth, 0);
else
{
bool has_priority = tid ? !Thread::current().is_userspace() : true;
if (has_priority)
m_queue_length++;
while (!(has_priority || m_queue_length == 0) || !m_locker.compare_exchange(-1, tid))
Scheduler::get().reschedule();
ASSERT_EQ(m_lock_depth, 0);
}
m_lock_depth++;
}
bool try_lock()
{
auto tid = Scheduler::current_tid();
if (tid == m_locker)
ASSERT_GT(m_lock_depth, 0);
else
{
bool has_priority = tid ? !Thread::current().is_userspace() : true;
if (!(has_priority || m_queue_length == 0) || !m_locker.compare_exchange(-1, tid))
return false;
if (has_priority)
m_queue_length++;
ASSERT_EQ(m_lock_depth, 0);
}
m_lock_depth++;
}
void unlock()
{
auto tid = Scheduler::current_tid();
ASSERT_EQ(m_locker.load(), tid);
ASSERT_GT(m_lock_depth, 0);
if (--m_lock_depth == 0)
{
bool has_priority = tid ? !Thread::current().is_userspace() : true;
if (has_priority)
m_queue_length--;
m_locker = -1;
}
}
pid_t locker() const { return m_locker; }
bool is_locked() const { return m_locker != -1; }
uint32_t lock_depth() const { return m_lock_depth; }
private:
BAN::Atomic<pid_t> m_locker { -1 };
uint32_t m_lock_depth { 0 };
BAN::Atomic<uint32_t> m_queue_length { 0 };
};
}

67
kernel/include/kernel/Lock/SpinLock.h Normal file
View File

@ -0,0 +1,67 @@
#pragma once
#include <BAN/Atomic.h>
#include <BAN/NoCopyMove.h>
#include <sys/types.h>
namespace Kernel
{
using InterruptState = bool;
class SpinLock
{
BAN_NON_COPYABLE(SpinLock);
BAN_NON_MOVABLE(SpinLock);
public:
SpinLock() = default;
InterruptState lock();
void unlock(InterruptState state);
private:
BAN::Atomic<pid_t> m_locker { -1 };
};
class RecursiveSpinLock
{
BAN_NON_COPYABLE(RecursiveSpinLock);
BAN_NON_MOVABLE(RecursiveSpinLock);
public:
RecursiveSpinLock() = default;
InterruptState lock();
void unlock(InterruptState state);
private:
BAN::Atomic<pid_t> m_locker { -1 };
uint32_t m_lock_depth { 0 };
};
template<typename Lock>
class SpinLockGuard
{
BAN_NON_COPYABLE(SpinLockGuard);
BAN_NON_MOVABLE(SpinLockGuard);
public:
SpinLockGuard(Lock& lock)
: m_lock(lock)
{
m_state = m_lock.lock();
}
~SpinLockGuard()
{
m_lock.unlock(m_state);
}
private:
Lock& m_lock;
InterruptState m_state;
};
}

2
kernel/include/kernel/Memory/Heap.h
View File

@ -3,8 +3,8 @@
#include <BAN/NoCopyMove.h>
#include <BAN/Vector.h>
#include <kernel/Lock/SpinLock.h>
#include <kernel/Memory/PhysicalRange.h>
#include <kernel/SpinLock.h>
namespace Kernel
{

30
kernel/include/kernel/Memory/PageTable.h
View File

@ -3,8 +3,8 @@
#include <BAN/Errors.h>
#include <BAN/Traits.h>
#include <kernel/CriticalScope.h>
#include <kernel/Lock/SpinLock.h>
#include <kernel/Memory/Types.h>
#include <kernel/SpinLock.h>
namespace Kernel
{
@ -15,6 +15,12 @@ namespace Kernel
requires BAN::is_same_v<decltype(func()), void>;
};
template<typename F>
concept with_fast_page_callback_error = requires(F func)
{
requires BAN::is_same_v<decltype(func()), BAN::ErrorOr<void>>;
};
class PageTable
{
public:
@ -37,19 +43,27 @@ namespace Kernel
static PageTable& kernel();
static PageTable& current();
static void map_fast_page(paddr_t);
static void unmap_fast_page();
static constexpr vaddr_t fast_page() { return KERNEL_OFFSET; }
template<with_fast_page_callback F>
static void with_fast_page(paddr_t paddr, F callback)
{
CriticalScope _;
SpinLockGuard _(s_fast_page_lock);
map_fast_page(paddr);
callback();
unmap_fast_page();
}
template<with_fast_page_callback_error F>
static BAN::ErrorOr<void> with_fast_page(paddr_t paddr, F callback)
{
SpinLockGuard _(s_fast_page_lock);
map_fast_page(paddr);
auto ret = callback();
unmap_fast_page();
return ret;
}
// FIXME: implement sized checks, return span, etc
static void* fast_page_as_ptr(size_t offset = 0)
{
@ -97,8 +111,8 @@ namespace Kernel
void load();
void lock() const { m_lock.lock(); }
void unlock() const { m_lock.unlock(); }
InterruptState lock() const { return m_lock.lock(); }
void unlock(InterruptState state) const { m_lock.unlock(state); }
void debug_dump();
@ -110,9 +124,13 @@ namespace Kernel
void prepare_fast_page();
static void invalidate(vaddr_t);
static void map_fast_page(paddr_t);
static void unmap_fast_page();
private:
paddr_t m_highest_paging_struct { 0 };
mutable RecursiveSpinLock m_lock;
static SpinLock s_fast_page_lock;
};
static constexpr size_t range_page_count(vaddr_t start, size_t bytes)

33
kernel/include/kernel/Memory/PageTableScope.h
View File

@ -1,33 +0,0 @@
#pragma once
#include <kernel/CriticalScope.h>
#include <kernel/LockGuard.h>
#include <kernel/Memory/PageTable.h>
namespace Kernel
{
class PageTableScope
{
public:
PageTableScope(PageTable& page_table)
: m_guard(page_table)
, m_old(PageTable::current())
, m_temp(page_table)
{
if (&m_old != &m_temp)
m_temp.load();
}
~PageTableScope()
{
if (&m_old != &m_temp)
m_old.load();
}
private:
LockGuard<PageTable> m_guard;
CriticalScope m_scope;
PageTable& m_old;
PageTable& m_temp;
};
}

2
kernel/include/kernel/Networking/ARPTable.h
View File

@ -51,7 +51,7 @@ namespace Kernel
};
private:
SpinLock m_lock;
SpinLock m_table_lock;
BAN::HashMap<BAN::IPv4Address, BAN::MACAddress> m_arp_table;

3
kernel/include/kernel/Networking/IPv4Layer.h
View File

@ -12,7 +12,6 @@
#include <kernel/Networking/NetworkLayer.h>
#include <kernel/Networking/NetworkSocket.h>
#include <kernel/Process.h>
#include <kernel/SpinLock.h>
namespace Kernel
{
@ -68,7 +67,7 @@ namespace Kernel
};
private:
RecursiveSpinLock m_lock;
RecursiveSpinLock m_bound_socket_lock;
BAN::UniqPtr<ARPTable> m_arp_table;
Process* m_process { nullptr };

3
kernel/include/kernel/Networking/TCPSocket.h
View File

@ -1,6 +1,7 @@
#pragma once
#include <BAN/Endianness.h>
#include <kernel/Lock/Mutex.h>
#include <kernel/Memory/VirtualRange.h>
#include <kernel/Networking/NetworkInterface.h>
#include <kernel/Networking/NetworkSocket.h>
@ -119,7 +120,7 @@ namespace Kernel
uint64_t m_time_wait_start_ms { 0 };
RecursiveSpinLock m_lock;
Mutex m_lock;
Semaphore m_semaphore;
BAN::Atomic<bool> m_should_ack { false };

1
kernel/include/kernel/Networking/UDPSocket.h
View File

@ -2,6 +2,7 @@
#include <BAN/CircularQueue.h>
#include <BAN/Endianness.h>
#include <kernel/Lock/SpinLock.h>
#include <kernel/Memory/VirtualRange.h>
#include <kernel/Networking/NetworkInterface.h>
#include <kernel/Networking/NetworkSocket.h>

2
kernel/include/kernel/Networking/UNIX/Socket.h
View File

@ -4,6 +4,7 @@
#include <BAN/WeakPtr.h>
#include <kernel/FS/Socket.h>
#include <kernel/FS/TmpFS/Inode.h>
#include <kernel/Lock/SpinLock.h>
namespace Kernel
{
@ -65,6 +66,7 @@ namespace Kernel
BAN::CircularQueue<size_t, 128> m_packet_sizes;
size_t m_packet_size_total { 0 };
BAN::UniqPtr<VirtualRange> m_packet_buffer;
SpinLock m_packet_lock;
Semaphore m_packet_semaphore;
friend class BAN::RefPtr<UnixDomainSocket>;

7
kernel/include/kernel/Process.h
View File

@ -7,10 +7,10 @@
#include <BAN/Vector.h>
#include <kernel/Credentials.h>
#include <kernel/FS/Inode.h>
#include <kernel/Lock/Mutex.h>
#include <kernel/Memory/Heap.h>
#include <kernel/Memory/MemoryRegion.h>
#include <kernel/OpenFileDescriptorSet.h>
#include <kernel/SpinLock.h>
#include <kernel/Terminal/TTY.h>
#include <kernel/Thread.h>
@ -51,9 +51,6 @@ namespace Kernel
void register_to_scheduler();
void exit(int status, int signal);
static void for_each_process(const BAN::Function<BAN::Iteration(Process&)>& callback);
static void for_each_process_in_session(pid_t sid, const BAN::Function<BAN::Iteration(Process&)>& callback);
void add_thread(Thread*);
void on_thread_exit(Thread&);
@ -222,7 +219,7 @@ namespace Kernel
const pid_t m_pid;
const pid_t m_parent;
mutable RecursiveSpinLock m_lock;
mutable Mutex m_process_lock;
BAN::String m_working_directory;
BAN::Vector<Thread*> m_threads;

65
kernel/include/kernel/SpinLock.h
View File

@ -1,65 +0,0 @@
#pragma once
#include <BAN/Atomic.h>
#include <BAN/NoCopyMove.h>
#include <sys/types.h>
namespace Kernel
{
class SpinLock
{
BAN_NON_COPYABLE(SpinLock);
BAN_NON_MOVABLE(SpinLock);
public:
SpinLock() = default;
void lock();
void unlock();
bool is_locked() const;
uint32_t lock_depth() const { return m_locker != -1; }
private:
BAN::Atomic<pid_t> m_locker = -1;
};
class RecursiveSpinLock
{
BAN_NON_COPYABLE(RecursiveSpinLock);
BAN_NON_MOVABLE(RecursiveSpinLock);
public:
RecursiveSpinLock() = default;
void lock();
void unlock();
bool is_locked() const;
uint32_t lock_depth() const { return m_lock_depth; }
private:
BAN::Atomic<pid_t> m_locker = -1;
BAN::Atomic<uint32_t> m_lock_depth = 0;
};
class RecursivePrioritySpinLock
{
BAN_NON_COPYABLE(RecursivePrioritySpinLock);
BAN_NON_MOVABLE(RecursivePrioritySpinLock);
public:
RecursivePrioritySpinLock() = default;
void lock();
void unlock();
bool is_locked() const;
uint32_t lock_depth() const { return m_lock_depth; }
private:
BAN::Atomic<pid_t> m_locker = -1;
BAN::Atomic<uint32_t> m_lock_depth = 0;
BAN::Atomic<uint32_t> m_queue_length = 0;
};
}

4
kernel/include/kernel/Storage/ATA/ATABus.h
View File

@ -4,7 +4,7 @@
#include <BAN/RefPtr.h>
#include <BAN/Vector.h>
#include <kernel/InterruptController.h>
#include <kernel/SpinLock.h>
#include <kernel/Lock/Mutex.h>
namespace Kernel
{
@ -51,7 +51,7 @@ namespace Kernel
private:
const uint16_t m_base;
const uint16_t m_ctrl;
SpinLock m_lock;
Mutex m_mutex;
volatile bool m_has_got_irq { false };

1
kernel/include/kernel/Storage/DiskCache.h
View File

@ -3,7 +3,6 @@
#include <BAN/Array.h>
#include <BAN/ByteSpan.h>
#include <kernel/Memory/Types.h>
#include <kernel/SpinLock.h>
namespace Kernel
{

3
kernel/include/kernel/Storage/NVMe/Queue.h
View File

@ -3,6 +3,7 @@
#include <BAN/UniqPtr.h>
#include <BAN/Vector.h>
#include <kernel/InterruptController.h>
#include <kernel/Lock/Mutex.h>
#include <kernel/Memory/DMARegion.h>
#include <kernel/Semaphore.h>
#include <kernel/Storage/NVMe/Definitions.h>
@ -20,7 +21,7 @@ namespace Kernel
virtual void handle_irq() final override;
private:
SpinLock m_lock;
Mutex m_mutex;
BAN::UniqPtr<Kernel::DMARegion> m_completion_queue;
BAN::UniqPtr<Kernel::DMARegion> m_submission_queue;
volatile NVMe::DoorbellRegisters& m_doorbell;

3
kernel/include/kernel/Storage/StorageDevice.h
View File

@ -2,6 +2,7 @@
#include <BAN/Vector.h>
#include <kernel/Device/Device.h>
#include <kernel/Lock/Mutex.h>
#include <kernel/Storage/DiskCache.h>
#include <kernel/Storage/Partition.h>
@ -44,7 +45,7 @@ namespace Kernel
virtual bool has_error_impl() const override { return false; }
private:
SpinLock m_lock;
Mutex m_mutex;
BAN::Optional<DiskCache> m_disk_cache;
BAN::Vector<BAN::RefPtr<Partition>> m_partitions;

4
kernel/include/kernel/Terminal/TTY.h
View File

@ -3,7 +3,7 @@
#include <BAN/Array.h>
#include <kernel/Device/Device.h>
#include <kernel/Input/KeyEvent.h>
#include <kernel/SpinLock.h>
#include <kernel/Lock/SpinLock.h>
#include <kernel/Terminal/TerminalDriver.h>
#include <kernel/Terminal/termios.h>
#include <kernel/Semaphore.h>
@ -84,6 +84,8 @@ namespace Kernel
Semaphore semaphore;
};
Buffer m_output;
RecursiveSpinLock m_write_lock;
};
}

1
kernel/include/kernel/Terminal/VirtualTTY.h
View File

@ -3,7 +3,6 @@
#include <BAN/Array.h>
#include <kernel/Device/Device.h>
#include <kernel/Input/KeyEvent.h>
#include <kernel/SpinLock.h>
#include <kernel/Terminal/TerminalDriver.h>
#include <kernel/Terminal/termios.h>
#include <kernel/Terminal/TTY.h>

25
kernel/kernel/ACPI.cpp
View File

@ -99,10 +99,10 @@ namespace Kernel
if (rsdp->revision >= 2)
{
PageTable::map_fast_page(rsdp->xsdt_address & PAGE_ADDR_MASK);
TRY(PageTable::with_fast_page(rsdp->xsdt_address & PAGE_ADDR_MASK,
[&]() -> BAN::ErrorOr<void>
{
auto& xsdt = PageTable::fast_page_as<const XSDT>(rsdp->xsdt_address % PAGE_SIZE);
BAN::ScopeGuard _([] { PageTable::unmap_fast_page(); });
if (memcmp(xsdt.signature, "XSDT", 4) != 0)
return BAN::Error::from_error_code(ErrorCode::ACPI_RootInvalid);
if (!is_valid_std_header(&xsdt))
@ -111,13 +111,16 @@ namespace Kernel
m_header_table_paddr = rsdp->xsdt_address + offsetof(XSDT, entries);
m_entry_size = 8;
root_entry_count = (xsdt.length - sizeof(SDTHeader)) / 8;
return {};
}
));
}
else
{
PageTable::map_fast_page(rsdp->rsdt_address & PAGE_ADDR_MASK);
TRY(PageTable::with_fast_page(rsdp->rsdt_address & PAGE_ADDR_MASK,
[&]() -> BAN::ErrorOr<void>
{
auto& rsdt = PageTable::fast_page_as<const RSDT>(rsdp->rsdt_address % PAGE_SIZE);
BAN::ScopeGuard _([] { PageTable::unmap_fast_page(); });
if (memcmp(rsdt.signature, "RSDT", 4) != 0)
return BAN::Error::from_error_code(ErrorCode::ACPI_RootInvalid);
if (!is_valid_std_header(&rsdt))
@ -126,6 +129,9 @@ namespace Kernel
m_header_table_paddr = rsdp->rsdt_address + offsetof(RSDT, entries);
m_entry_size = 4;
root_entry_count = (rsdt.length - sizeof(SDTHeader)) / 4;
return {};
}
));
}
size_t needed_pages = range_page_count(m_header_table_paddr, root_entry_count * m_entry_size);
@ -144,9 +150,10 @@ namespace Kernel
auto map_header =
[](paddr_t header_paddr) -> vaddr_t
{
PageTable::map_fast_page(header_paddr & PAGE_ADDR_MASK);
size_t header_length = PageTable::fast_page_as<SDTHeader>(header_paddr % PAGE_SIZE).length;
PageTable::unmap_fast_page();
size_t header_length;
PageTable::with_fast_page(header_paddr & PAGE_ADDR_MASK, [&] {
header_length = PageTable::fast_page_as<SDTHeader>(header_paddr % PAGE_SIZE).length;
});
size_t needed_pages = range_page_count(header_paddr, header_length);
vaddr_t page_vaddr = PageTable::kernel().reserve_free_contiguous_pages(needed_pages, KERNEL_OFFSET);

2
kernel/kernel/APIC.cpp
View File

@ -1,8 +1,8 @@
#include <BAN/ScopeGuard.h>
#include <kernel/Debug.h>
#include <kernel/ACPI.h>
#include <kernel/APIC.h>
#include <kernel/CPUID.h>
#include <kernel/Debug.h>
#include <kernel/IDT.h>
#include <kernel/Memory/PageTable.h>
#include <kernel/MMIO.h>

18
kernel/kernel/Debug.cpp
View File

@ -1,7 +1,7 @@
#include <kernel/Debug.h>
#include <kernel/InterruptController.h>
#include <kernel/Lock/SpinLock.h>
#include <kernel/Memory/PageTable.h>
#include <kernel/SpinLock.h>
#include <kernel/Terminal/Serial.h>
#include <kernel/Terminal/TTY.h>
#include <kernel/Timer/Timer.h>
@ -13,6 +13,8 @@ extern TerminalDriver* g_terminal_driver;
namespace Debug
{
Kernel::RecursiveSpinLock s_debug_lock;
void dump_stack_trace()
{
using namespace Kernel;
@ -120,18 +122,4 @@ namespace Debug
BAN::Formatter::print(Debug::putchar, "[{5}.{3}] {}:{}: ", ms_since_boot / 1000, ms_since_boot % 1000, file, line);
}
static Kernel::RecursiveSpinLock s_debug_lock;
void DebugLock::lock()
{
if (Kernel::interrupts_enabled())
s_debug_lock.lock();
}
void DebugLock::unlock()
{
if (Kernel::interrupts_enabled())
s_debug_lock.unlock();
}
}

3
kernel/kernel/Device/DebugDevice.cpp
View File

@ -20,7 +20,7 @@ namespace Kernel
BAN::ErrorOr<size_t> DebugDevice::write_impl(off_t, BAN::ConstByteSpan buffer)
{
auto ms_since_boot = SystemTimer::get().ms_since_boot();
Debug::DebugLock::lock();
SpinLockGuard _(Debug::s_debug_lock);
BAN::Formatter::print(Debug::putchar, "[{5}.{3}] {}: ",
ms_since_boot / 1000,
ms_since_boot % 1000,
@ -28,7 +28,6 @@ namespace Kernel
);
for (size_t i = 0; i < buffer.size(); i++)
Debug::putchar(buffer[i]);
Debug::DebugLock::unlock();
return buffer.size();
}

7
kernel/kernel/FS/DevFS/FileSystem.cpp
View File

@ -5,7 +5,7 @@
#include <kernel/Device/ZeroDevice.h>
#include <kernel/FS/DevFS/FileSystem.h>
#include <kernel/FS/TmpFS/Inode.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Process.h>
#include <kernel/Scheduler.h>
#include <kernel/Storage/StorageDevice.h>
@ -56,12 +56,9 @@ namespace Kernel
sync_process->add_thread(MUST(Thread::create_kernel(
[](void*)
{
// NOTE: we lock the device lock here and unlock
// it only while semaphore is blocking
s_instance->m_device_lock.lock();
while (true)
{
LockGuard _(s_instance->m_device_lock);
while (!s_instance->m_should_sync)
{
LockFreeGuard _(s_instance->m_device_lock);

22
kernel/kernel/FS/Ext2/FileSystem.cpp
View File

@ -1,6 +1,6 @@
#include <BAN/ScopeGuard.h>
#include <kernel/FS/Ext2/FileSystem.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#define EXT2_DEBUG_PRINT 0
#define EXT2_VERIFY_INODE 0
@ -139,7 +139,7 @@ namespace Kernel
BAN::ErrorOr<uint32_t> Ext2FS::create_inode(const Ext2::Inode& ext2_inode)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(ext2_inode.size == 0);
@ -218,7 +218,7 @@ namespace Kernel
void Ext2FS::delete_inode(uint32_t ino)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(ino >= superblock().first_ino);
ASSERT(ino <= superblock().inodes_count);
@ -271,7 +271,7 @@ namespace Kernel
void Ext2FS::read_block(uint32_t block, BlockBufferWrapper& buffer)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
const uint32_t sector_size = m_block_device->blksize();
const uint32_t block_size = this->block_size();
@ -284,7 +284,7 @@ namespace Kernel
void Ext2FS::write_block(uint32_t block, const BlockBufferWrapper& buffer)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
const uint32_t sector_size = m_block_device->blksize();
const uint32_t block_size = this->block_size();
@ -297,7 +297,7 @@ namespace Kernel
void Ext2FS::sync_superblock()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
const uint32_t sector_size = m_block_device->blksize();
ASSERT(1024 % sector_size == 0);
@ -322,13 +322,13 @@ namespace Kernel
Ext2FS::BlockBufferWrapper Ext2FS::get_block_buffer()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
return m_buffer_manager.get_buffer();
}
BAN::ErrorOr<uint32_t> Ext2FS::reserve_free_block(uint32_t primary_bgd)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (m_superblock.r_blocks_count >= m_superblock.free_blocks_count)
return BAN::Error::from_errno(ENOSPC);
@ -389,7 +389,7 @@ namespace Kernel
void Ext2FS::release_block(uint32_t block)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(block >= m_superblock.first_data_block);
ASSERT(block < m_superblock.blocks_count);
@ -422,7 +422,7 @@ namespace Kernel
Ext2FS::BlockLocation Ext2FS::locate_inode(uint32_t ino)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(ino <= superblock().inodes_count);
@ -464,7 +464,7 @@ namespace Kernel
Ext2FS::BlockLocation Ext2FS::locate_block_group_descriptior(uint32_t group_index)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
const uint32_t block_size = this->block_size();

46
kernel/kernel/FS/Inode.cpp
View File

@ -1,5 +1,5 @@
#include <kernel/FS/Inode.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <fcntl.h>
@ -58,13 +58,13 @@ namespace Kernel
void Inode::on_close()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
on_close_impl();
}
BAN::ErrorOr<BAN::RefPtr<Inode>> Inode::find_inode(BAN::StringView name)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifdir())
return BAN::Error::from_errno(ENOTDIR);
return find_inode_impl(name);
@ -72,7 +72,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::list_next_inodes(off_t offset, DirectoryEntryList* list, size_t list_len)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifdir())
return BAN::Error::from_errno(ENOTDIR);
return list_next_inodes_impl(offset, list, list_len);
@ -80,7 +80,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::create_file(BAN::StringView name, mode_t mode, uid_t uid, gid_t gid)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!this->mode().ifdir())
return BAN::Error::from_errno(ENOTDIR);
if (Mode(mode).ifdir())
@ -90,7 +90,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::create_directory(BAN::StringView name, mode_t mode, uid_t uid, gid_t gid)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!this->mode().ifdir())
return BAN::Error::from_errno(ENOTDIR);
if (!Mode(mode).ifdir())
@ -100,7 +100,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::unlink(BAN::StringView name)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifdir())
return BAN::Error::from_errno(ENOTDIR);
if (name == "."sv || name == ".."sv)
@ -110,7 +110,7 @@ namespace Kernel
BAN::ErrorOr<BAN::String> Inode::link_target()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().iflnk())
return BAN::Error::from_errno(EINVAL);
return link_target_impl();
@ -118,7 +118,7 @@ namespace Kernel
BAN::ErrorOr<long> Inode::accept(sockaddr* address, socklen_t* address_len)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
return accept_impl(address, address_len);
@ -126,7 +126,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::bind(const sockaddr* address, socklen_t address_len)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
return bind_impl(address, address_len);
@ -134,7 +134,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::connect(const sockaddr* address, socklen_t address_len)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
return connect_impl(address, address_len);
@ -142,7 +142,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::listen(int backlog)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
return listen_impl(backlog);
@ -150,7 +150,7 @@ namespace Kernel
BAN::ErrorOr<size_t> Inode::sendto(BAN::ConstByteSpan message, const sockaddr* address, socklen_t address_len)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
return sendto_impl(message, address, address_len);
@ -158,7 +158,7 @@ namespace Kernel
BAN::ErrorOr<size_t> Inode::recvfrom(BAN::ByteSpan buffer, sockaddr* address, socklen_t* address_len)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!mode().ifsock())
return BAN::Error::from_errno(ENOTSOCK);
return recvfrom_impl(buffer, address, address_len);
@ -166,7 +166,7 @@ namespace Kernel
BAN::ErrorOr<size_t> Inode::read(off_t offset, BAN::ByteSpan buffer)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (mode().ifdir())
return BAN::Error::from_errno(EISDIR);
return read_impl(offset, buffer);
@ -174,7 +174,7 @@ namespace Kernel
BAN::ErrorOr<size_t> Inode::write(off_t offset, BAN::ConstByteSpan buffer)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (mode().ifdir())
return BAN::Error::from_errno(EISDIR);
return write_impl(offset, buffer);
@ -182,7 +182,7 @@ namespace Kernel
BAN::ErrorOr<void> Inode::truncate(size_t size)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (mode().ifdir())
return BAN::Error::from_errno(EISDIR);
return truncate_impl(size);
@ -191,37 +191,37 @@ namespace Kernel
BAN::ErrorOr<void> Inode::chmod(mode_t mode)
{
ASSERT((mode & Inode::Mode::TYPE_MASK) == 0);
LockGuard _(m_lock);
LockGuard _(m_mutex);
return chmod_impl(mode);
}
BAN::ErrorOr<void> Inode::chown(uid_t uid, gid_t gid)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
return chown_impl(uid, gid);
}
bool Inode::can_read() const
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
return can_read_impl();
}
bool Inode::can_write() const
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
return can_write_impl();
}
bool Inode::has_error() const
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
return has_error_impl();
}
BAN::ErrorOr<long> Inode::ioctl(int request, void* arg)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
return ioctl_impl(request, arg);
}

12
kernel/kernel/FS/Pipe.cpp
View File

@ -1,5 +1,5 @@
#include <kernel/FS/Pipe.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Thread.h>
#include <kernel/Timer/Timer.h>
@ -26,14 +26,14 @@ namespace Kernel
void Pipe::clone_writing()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(m_writing_count > 0);
m_writing_count++;
}
void Pipe::close_writing()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(m_writing_count > 0);
m_writing_count--;
if (m_writing_count == 0)
@ -42,12 +42,12 @@ namespace Kernel
BAN::ErrorOr<size_t> Pipe::read_impl(off_t, BAN::ByteSpan buffer)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
while (m_buffer.empty())
{
if (m_writing_count == 0)
return 0;
LockFreeGuard lock_free(m_lock);
LockFreeGuard lock_free(m_mutex);
TRY(Thread::current().block_or_eintr_indefinite(m_semaphore));
}
@ -66,7 +66,7 @@ namespace Kernel
BAN::ErrorOr<size_t> Pipe::write_impl(off_t, BAN::ConstByteSpan buffer)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
size_t old_size = m_buffer.size();

2
kernel/kernel/FS/ProcFS/FileSystem.cpp
View File

@ -1,6 +1,6 @@
#include <kernel/FS/ProcFS/FileSystem.h>
#include <kernel/FS/ProcFS/Inode.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
namespace Kernel
{

28
kernel/kernel/FS/TmpFS/FileSystem.cpp
View File

@ -66,7 +66,7 @@ namespace Kernel
BAN::ErrorOr<BAN::RefPtr<TmpInode>> TmpFileSystem::open_inode(ino_t ino)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (m_inode_cache.contains(ino))
return m_inode_cache[ino];
@ -85,7 +85,7 @@ namespace Kernel
BAN::ErrorOr<void> TmpFileSystem::add_to_cache(BAN::RefPtr<TmpInode> inode)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!m_inode_cache.contains(inode->ino()))
TRY(m_inode_cache.insert(inode->ino(), inode));
@ -94,7 +94,7 @@ namespace Kernel
void TmpFileSystem::remove_from_cache(BAN::RefPtr<TmpInode> inode)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(m_inode_cache.contains(inode->ino()));
m_inode_cache.remove(inode->ino());
@ -102,7 +102,7 @@ namespace Kernel
void TmpFileSystem::read_inode(ino_t ino, TmpInodeInfo& out)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
auto inode_location = find_inode(ino);
PageTable::with_fast_page(inode_location.paddr, [&] {
@ -112,7 +112,7 @@ namespace Kernel
void TmpFileSystem::write_inode(ino_t ino, const TmpInodeInfo& info)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
auto inode_location = find_inode(ino);
PageTable::with_fast_page(inode_location.paddr, [&] {
@ -123,7 +123,7 @@ namespace Kernel
void TmpFileSystem::delete_inode(ino_t ino)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
auto inode_location = find_inode(ino);
PageTable::with_fast_page(inode_location.paddr, [&] {
@ -138,7 +138,7 @@ namespace Kernel
BAN::ErrorOr<ino_t> TmpFileSystem::allocate_inode(const TmpInodeInfo& info)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
constexpr size_t inodes_per_page = PAGE_SIZE / sizeof(TmpInodeInfo);
@ -164,7 +164,7 @@ namespace Kernel
TmpFileSystem::InodeLocation TmpFileSystem::find_inode(ino_t ino)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT_GTE(ino, first_inode);
ASSERT_LT(ino, max_inodes);
@ -182,7 +182,7 @@ namespace Kernel
void TmpFileSystem::free_block(size_t index)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
constexpr size_t addresses_per_page = PAGE_SIZE / sizeof(PageInfo);
@ -204,7 +204,7 @@ namespace Kernel
BAN::ErrorOr<size_t> TmpFileSystem::allocate_block()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
size_t result = first_data_page;
TRY(for_each_indirect_paddr_allocating(m_data_pages, [&] (paddr_t, bool allocated) {
@ -218,7 +218,7 @@ namespace Kernel
paddr_t TmpFileSystem::find_block(size_t index)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT_GT(index, 0);
return find_indirect(m_data_pages, index - first_data_page, 3);
@ -226,7 +226,7 @@ namespace Kernel
paddr_t TmpFileSystem::find_indirect(PageInfo root, size_t index, size_t depth)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(root.flags() & PageInfo::Flags::Present);
if (depth == 0)
@ -257,7 +257,7 @@ namespace Kernel
template<TmpFuncs::for_each_indirect_paddr_allocating_callback F>
BAN::ErrorOr<BAN::Iteration> TmpFileSystem::for_each_indirect_paddr_allocating_internal(PageInfo page_info, F callback, size_t depth)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(page_info.flags() & PageInfo::Flags::Present);
if (depth == 0)
@ -316,7 +316,7 @@ namespace Kernel
template<TmpFuncs::for_each_indirect_paddr_allocating_callback F>
BAN::ErrorOr<void> TmpFileSystem::for_each_indirect_paddr_allocating(PageInfo page_info, F callback, size_t depth)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
BAN::Iteration result = TRY(for_each_indirect_paddr_allocating_internal(page_info, callback, depth));
ASSERT(result == BAN::Iteration::Break);

11
kernel/kernel/FS/VirtualFileSystem.cpp
View File

@ -5,7 +5,7 @@
#include <kernel/FS/ProcFS/FileSystem.h>
#include <kernel/FS/TmpFS/FileSystem.h>
#include <kernel/FS/VirtualFileSystem.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <fcntl.h>
namespace Kernel
@ -63,15 +63,14 @@ namespace Kernel
if (!file.inode->mode().ifdir())
return BAN::Error::from_errno(ENOTDIR);
LockGuard _(m_lock);
LockGuard _(m_mutex);
TRY(m_mount_points.push_back({ file, file_system }));
return {};
}
VirtualFileSystem::MountPoint* VirtualFileSystem::mount_from_host_inode(BAN::RefPtr<Inode> inode)
{
ASSERT(m_lock.is_locked());
LockGuard _(m_mutex);
for (MountPoint& mount : m_mount_points)
if (*mount.host.inode == *inode)
return &mount;
@ -80,7 +79,7 @@ namespace Kernel
VirtualFileSystem::MountPoint* VirtualFileSystem::mount_from_root_inode(BAN::RefPtr<Inode> inode)
{
ASSERT(m_lock.is_locked());
LockGuard _(m_mutex);
for (MountPoint& mount : m_mount_points)
if (*mount.target->root_inode() == *inode)
return &mount;
@ -89,7 +88,7 @@ namespace Kernel
BAN::ErrorOr<VirtualFileSystem::File> VirtualFileSystem::file_from_absolute_path(const Credentials& credentials, BAN::StringView path, int flags)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(path.front() == '/');

12
kernel/kernel/Input/PS2/Controller.cpp
View File

@ -22,7 +22,7 @@ namespace Kernel::Input
BAN::ErrorOr<void> PS2Controller::send_byte(uint16_t port, uint8_t byte)
{
ASSERT(interrupts_enabled());
LockGuard _(m_lock);
LockGuard _(m_mutex);
uint64_t timeout = SystemTimer::get().ms_since_boot() + s_ps2_timeout_ms;
while (SystemTimer::get().ms_since_boot() < timeout)
{
@ -37,7 +37,7 @@ namespace Kernel::Input
BAN::ErrorOr<uint8_t> PS2Controller::read_byte()
{
ASSERT(interrupts_enabled());
LockGuard _(m_lock);
LockGuard _(m_mutex);
uint64_t timeout = SystemTimer::get().ms_since_boot() + s_ps2_timeout_ms;
while (SystemTimer::get().ms_since_boot() < timeout)
{
@ -50,14 +50,14 @@ namespace Kernel::Input
BAN::ErrorOr<void> PS2Controller::send_command(PS2::Command command)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
TRY(send_byte(PS2::IOPort::COMMAND, command));
return {};
}
BAN::ErrorOr<void> PS2Controller::send_command(PS2::Command command, uint8_t data)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
TRY(send_byte(PS2::IOPort::COMMAND, command));
TRY(send_byte(PS2::IOPort::DATA, data));
return {};
@ -65,7 +65,7 @@ namespace Kernel::Input
BAN::ErrorOr<void> PS2Controller::device_send_byte(uint8_t device_index, uint8_t byte)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (device_index == 1)
TRY(send_byte(PS2::IOPort::COMMAND, PS2::Command::WRITE_TO_SECOND_PORT));
TRY(send_byte(PS2::IOPort::DATA, byte));
@ -74,7 +74,7 @@ namespace Kernel::Input
BAN::ErrorOr<void> PS2Controller::device_send_byte_and_wait_ack(uint8_t device_index, uint8_t byte)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
for (;;)
{
TRY(device_send_byte(device_index, byte));

7
kernel/kernel/InterruptController.cpp
View File

@ -67,11 +67,4 @@ namespace Kernel
dwarnln("could not enter acpi mode");
}
bool interrupts_enabled()
{
uintptr_t flags;
asm volatile("pushf; pop %0" : "=r"(flags) :: "memory");
return flags & (1 << 9);
}
}

64
kernel/kernel/Lock/SpinLock.cpp Normal file
View File

@ -0,0 +1,64 @@
#include <kernel/InterruptController.h>
#include <kernel/Lock/SpinLock.h>
#include <kernel/Scheduler.h>
// FIXME: try to move these to header
namespace Kernel
{
InterruptState SpinLock::lock()
{
auto tid = Scheduler::current_tid();
ASSERT_NEQ(m_locker.load(), tid);
InterruptState state = interrupts_enabled();
DISABLE_INTERRUPTS();
if (!m_locker.compare_exchange(-1, tid))
ASSERT_NOT_REACHED();
return state;
}
void SpinLock::unlock(InterruptState state)
{
ASSERT_EQ(m_locker.load(), Scheduler::current_tid());
m_locker.store(-1);
if (state)
ENABLE_INTERRUPTS();
}
InterruptState RecursiveSpinLock::lock()
{
auto tid = Scheduler::current_tid();
InterruptState state = interrupts_enabled();
DISABLE_INTERRUPTS();
if (tid == m_locker)
ASSERT_GT(m_lock_depth, 0);
else
{
if (!m_locker.compare_exchange(-1, tid))
ASSERT_NOT_REACHED();
ASSERT_EQ(m_lock_depth, 0);
}
m_lock_depth++;
return state;
}
void RecursiveSpinLock::unlock(InterruptState state)
{
auto tid = Scheduler::current_tid();
ASSERT_EQ(m_locker.load(), tid);
ASSERT_GT(m_lock_depth, 0);
if (--m_lock_depth == 0)
m_locker = -1;
if (state)
ENABLE_INTERRUPTS();
}
}

11
kernel/kernel/Memory/FileBackedRegion.cpp
View File

@ -1,5 +1,5 @@
#include <kernel/CriticalScope.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Memory/FileBackedRegion.h>
#include <kernel/Memory/Heap.h>
@ -26,7 +26,7 @@ namespace Kernel
if (type == Type::SHARED)
{
LockGuard _(inode->m_lock);
LockGuard _(inode->m_mutex);
if (inode->m_shared_region.valid())
region->m_shared_data = inode->m_shared_region.lock();
else
@ -157,7 +157,7 @@ namespace Kernel
}
else if (m_type == Type::SHARED)
{
LockGuard _(m_inode->m_lock);
LockGuard _(m_inode->m_mutex);
ASSERT(m_inode->m_shared_region.valid());
ASSERT(m_shared_data->pages.size() == BAN::Math::div_round_up<size_t>(m_inode->size(), PAGE_SIZE));
@ -175,10 +175,9 @@ namespace Kernel
TRY(m_inode->read(offset, BAN::ByteSpan(m_shared_data->page_buffer, bytes)));
CriticalScope _;
PageTable::map_fast_page(pages[page_index]);
PageTable::with_fast_page(pages[page_index], [&] {
memcpy(PageTable::fast_page_as_ptr(), m_shared_data->page_buffer, PAGE_SIZE);
PageTable::unmap_fast_page();
});
}
paddr_t paddr = pages[page_index];

13
kernel/kernel/Memory/Heap.cpp
View File

@ -1,5 +1,4 @@
#include <kernel/BootInfo.h>
#include <kernel/LockGuard.h>
#include <kernel/Memory/Heap.h>
#include <kernel/Memory/PageTable.h>
@ -67,7 +66,7 @@ namespace Kernel
paddr_t Heap::take_free_page()
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (auto& range : m_physical_ranges)
if (range.free_pages() >= 1)
return range.reserve_page();
@ -76,7 +75,7 @@ namespace Kernel
void Heap::release_page(paddr_t paddr)
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (auto& range : m_physical_ranges)
if (range.contains(paddr))
return range.release_page(paddr);
@ -85,7 +84,7 @@ namespace Kernel
paddr_t Heap::take_free_contiguous_pages(size_t pages)
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (auto& range : m_physical_ranges)
if (range.free_pages() >= pages)
if (paddr_t paddr = range.reserve_contiguous_pages(pages))
@ -95,7 +94,7 @@ namespace Kernel
void Heap::release_contiguous_pages(paddr_t paddr, size_t pages)
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
for (auto& range : m_physical_ranges)
if (range.contains(paddr))
return range.release_contiguous_pages(paddr, pages);
@ -104,7 +103,7 @@ namespace Kernel
size_t Heap::used_pages() const
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
size_t result = 0;
for (const auto& range : m_physical_ranges)
result += range.used_pages();
@ -113,7 +112,7 @@ namespace Kernel
size_t Heap::free_pages() const
{
LockGuard _(m_lock);
SpinLockGuard _(m_lock);
size_t result = 0;
for (const auto& range : m_physical_ranges)
result += range.free_pages();

22
kernel/kernel/Memory/MemoryBackedRegion.cpp
View File

@ -1,5 +1,5 @@
#include <kernel/CriticalScope.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Memory/Heap.h>
#include <kernel/Memory/MemoryBackedRegion.h>
@ -57,15 +57,9 @@ namespace Kernel
m_page_table.map_page_at(paddr, vaddr, m_flags);
// Zero out the new page
if (&PageTable::current() == &m_page_table)
memset((void*)vaddr, 0x00, PAGE_SIZE);
else
{
CriticalScope _;
PageTable::map_fast_page(paddr);
PageTable::with_fast_page(paddr, [&] {
memset(PageTable::fast_page_as_ptr(), 0x00, PAGE_SIZE);
PageTable::unmap_fast_page();
}
});
return true;
}
@ -100,15 +94,9 @@ namespace Kernel
TRY(allocate_page_containing(write_vaddr));
if (&PageTable::current() == &m_page_table)
memcpy((void*)write_vaddr, (void*)(buffer + written), bytes);
else
{
CriticalScope _;
PageTable::map_fast_page(m_page_table.physical_address_of(write_vaddr & PAGE_ADDR_MASK));
PageTable::with_fast_page(m_page_table.physical_address_of(write_vaddr & PAGE_ADDR_MASK), [&] {
memcpy(PageTable::fast_page_as_ptr(page_offset), (void*)(buffer + written), bytes);
PageTable::unmap_fast_page();
}
});
written += bytes;
}

23
kernel/kernel/Memory/VirtualRange.cpp
View File

@ -1,5 +1,5 @@
#include <kernel/CriticalScope.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Memory/Heap.h>
#include <kernel/Memory/VirtualRange.h>
@ -68,7 +68,7 @@ namespace Kernel
}
ASSERT(vaddr + size <= vaddr_end);
LockGuard _(page_table);
SpinLockGuard _(page_table);
page_table.unmap_range(vaddr, size); // We have to unmap here to allow reservation in create_to_vaddr()
return create_to_vaddr(page_table, vaddr, size, flags, preallocate_pages);
}
@ -99,7 +99,7 @@ namespace Kernel
auto result = TRY(create_to_vaddr(page_table, vaddr(), size(), flags(), m_preallocated));
LockGuard _(m_page_table);
SpinLockGuard _(m_page_table);
for (size_t offset = 0; offset < size(); offset += PAGE_SIZE)
{
if (!m_preallocated && m_page_table.physical_address_of(vaddr() + offset))
@ -110,10 +110,9 @@ namespace Kernel
result->m_page_table.map_page_at(paddr, vaddr() + offset, m_flags);
}
CriticalScope _;
PageTable::map_fast_page(result->m_page_table.physical_address_of(vaddr() + offset));
PageTable::with_fast_page(result->m_page_table.physical_address_of(vaddr() + offset), [&] {
memcpy(PageTable::fast_page_as_ptr(), (void*)(vaddr() + offset), PAGE_SIZE);
PageTable::unmap_fast_page();
});
}
return result;
@ -148,10 +147,9 @@ namespace Kernel
for (size_t offset = 0; offset < size(); offset += PAGE_SIZE)
{
CriticalScope _;
PageTable::map_fast_page(m_page_table.physical_address_of(vaddr() + offset));
PageTable::with_fast_page(m_page_table.physical_address_of(vaddr() + offset), [&] {
memset(PageTable::fast_page_as_ptr(), 0x00, PAGE_SIZE);
PageTable::unmap_fast_page();
});
}
}
@ -176,12 +174,9 @@ namespace Kernel
while (bytes > 0)
{
{
CriticalScope _;
PageTable::map_fast_page(m_page_table.physical_address_of(vaddr() + page_index * PAGE_SIZE));
PageTable::with_fast_page(m_page_table.physical_address_of(vaddr() + page_index * PAGE_SIZE), [&] {
memcpy(PageTable::fast_page_as_ptr(page_offset), buffer, PAGE_SIZE - page_offset);
PageTable::unmap_fast_page();
}
});
buffer += PAGE_SIZE - page_offset;
bytes -= PAGE_SIZE - page_offset;

25
kernel/kernel/Networking/ARPTable.cpp
View File

@ -1,4 +1,3 @@
#include <kernel/LockGuard.h>
#include <kernel/Networking/ARPTable.h>
#include <kernel/Scheduler.h>
#include <kernel/Timer/Timer.h>
@ -52,9 +51,10 @@ namespace Kernel
ipv4_address = interface.get_gateway();
{
LockGuard _(m_lock);
if (m_arp_table.contains(ipv4_address))
return m_arp_table[ipv4_address];
SpinLockGuard _(m_table_lock);
auto it = m_arp_table.find(ipv4_address);
if (it != m_arp_table.end())
return it->value;
}
ARPPacket arp_request;
@ -74,9 +74,10 @@ namespace Kernel
while (SystemTimer::get().ms_since_boot() < timeout)
{
{
LockGuard _(m_lock);
if (m_arp_table.contains(ipv4_address))
return m_arp_table[ipv4_address];
SpinLockGuard _(m_table_lock);
auto it = m_arp_table.find(ipv4_address);
if (it != m_arp_table.end())
return it->value;
}
Scheduler::get().reschedule();
}
@ -114,13 +115,15 @@ namespace Kernel
}
case ARPOperation::Reply:
{
LockGuard _(m_lock);
if (m_arp_table.contains(packet.spa))
SpinLockGuard _(m_table_lock);
auto it = m_arp_table.find(packet.spa);
if (it != m_arp_table.end())
{
if (m_arp_table[packet.spa] != packet.sha)
if (it->value != packet.sha)
{
dprintln("Update IPv4 {} MAC to {}", packet.spa, packet.sha);
m_arp_table[packet.spa] = packet.sha;
it->value = packet.sha;
}
}
else

23
kernel/kernel/Networking/IPv4Layer.cpp
View File

@ -70,12 +70,14 @@ namespace Kernel
void IPv4Layer::unbind_socket(BAN::RefPtr<NetworkSocket> socket, uint16_t port)
{
LockGuard _(m_lock);
if (m_bound_sockets.contains(port))
{
ASSERT(m_bound_sockets[port].valid());
ASSERT(m_bound_sockets[port].lock() == socket);
m_bound_sockets.remove(port);
SpinLockGuard _(m_bound_socket_lock);
auto it = m_bound_sockets.find(port);
if (it != m_bound_sockets.end())
{
ASSERT(it->value.lock() == socket);
m_bound_sockets.remove(it);
}
}
NetworkManager::get().TmpFileSystem::remove_from_cache(socket);
}
@ -88,7 +90,7 @@ namespace Kernel
return BAN::Error::from_errno(EAFNOSUPPORT);
auto& sockaddr_in = *reinterpret_cast<const struct sockaddr_in*>(address);
LockGuard _(m_lock);
SpinLockGuard _(m_bound_socket_lock);
uint16_t port = NetworkSocket::PORT_NONE;
for (uint32_t i = 0; i < 100 && port == NetworkSocket::PORT_NONE; i++)
@ -124,7 +126,7 @@ namespace Kernel
auto& sockaddr_in = *reinterpret_cast<const struct sockaddr_in*>(address);
uint16_t port = BAN::host_to_network_endian(sockaddr_in.sin_port);
LockGuard _(m_lock);
SpinLockGuard _(m_bound_socket_lock);
if (m_bound_sockets.contains(port))
return BAN::Error::from_errno(EADDRINUSE);
@ -250,13 +252,14 @@ namespace Kernel
BAN::RefPtr<Kernel::NetworkSocket> bound_socket;
{
LockGuard _(m_lock);
if (!m_bound_sockets.contains(dst_port))
SpinLockGuard _(m_bound_socket_lock);
auto it = m_bound_sockets.find(dst_port);
if (it == m_bound_sockets.end())
{
dprintln_if(DEBUG_IPV4, "no one is listening on port {}", dst_port);
return {};
}
bound_socket = m_bound_sockets[dst_port].lock();
bound_socket = it->value.lock();
}
if (!bound_socket)

32
kernel/kernel/Networking/TCPSocket.cpp
View File

@ -1,4 +1,4 @@
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Networking/TCPSocket.h>
#include <kernel/Random.h>
#include <kernel/Timer/Timer.h>
@ -68,7 +68,7 @@ namespace Kernel
void TCPSocket::on_close_impl()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!is_bound())
return;
@ -103,7 +103,7 @@ namespace Kernel
if (address_len > (socklen_t)sizeof(sockaddr_storage))
address_len = sizeof(sockaddr_storage);
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(!m_connection_info.has_value());
@ -139,7 +139,7 @@ namespace Kernel
uint64_t wake_time_ms = SystemTimer::get().ms_since_boot() + 5000;
while (m_state != State::Established)
{
LockFreeGuard free(m_lock);
LockFreeGuard free(m_mutex);
if (SystemTimer::get().ms_since_boot() >= wake_time_ms)
return BAN::Error::from_errno(ECONNREFUSED);
TRY(Thread::current().block_or_eintr_or_waketime(m_semaphore, wake_time_ms, true));
@ -212,7 +212,7 @@ namespace Kernel
{
case State::Closed:
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
header.syn = 1;
add_tcp_header_option<0, TCPOption::MaximumSeqmentSize>(header, m_interface->payload_mtu() - m_network_layer.header_size());
add_tcp_header_option<4, TCPOption::WindowScale>(header, 0);
@ -233,7 +233,7 @@ namespace Kernel
break;
case State::CloseWait:
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
header.ack = 1;
header.fin = 1;
m_state = State::LastAck;
@ -242,7 +242,7 @@ namespace Kernel
}
case State::FinWait1:
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
header.ack = 1;
header.fin = 1;
m_state = State::FinWait2;
@ -250,7 +250,7 @@ namespace Kernel
}
case State::FinWait2:
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
header.ack = 1;
m_state = State::TimeWait;
m_time_wait_start_ms = SystemTimer::get().ms_since_boot();
@ -312,7 +312,7 @@ namespace Kernel
if (!header.ack || !header.syn)
break;
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (header.ack_number != m_send_window.current_seq)
{
@ -345,7 +345,7 @@ namespace Kernel
if (!header.ack)
break;
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (header.fin)
{
@ -436,7 +436,7 @@ namespace Kernel
set_connection_as_closed();
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (m_should_ack)
{
@ -518,7 +518,7 @@ namespace Kernel
BAN::ErrorOr<size_t> TCPSocket::recvfrom_impl(BAN::ByteSpan buffer, sockaddr*, socklen_t*)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (m_state == State::Closed)
return BAN::Error::from_errno(ENOTCONN);
@ -542,7 +542,7 @@ namespace Kernel
case State::Closing: ASSERT_NOT_REACHED();
};
LockFreeGuard free(m_lock);
LockFreeGuard free(m_mutex);
TRY(Thread::current().block_or_eintr_indefinite(m_semaphore));
}
@ -575,7 +575,7 @@ namespace Kernel
return message.size();
}
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (m_state == State::Closed)
return BAN::Error::from_errno(ENOTCONN);
@ -602,7 +602,7 @@ namespace Kernel
if (m_send_window.data_size + message.size() <= m_send_window.buffer->size())
break;
LockFreeGuard free(m_lock);
LockFreeGuard free(m_mutex);
TRY(Thread::current().block_or_eintr_indefinite(m_semaphore));
}
@ -634,7 +634,7 @@ namespace Kernel
case State::Closing: ASSERT_NOT_REACHED();
};
LockFreeGuard free(m_lock);
LockFreeGuard free(m_mutex);
TRY(Thread::current().block_or_eintr_indefinite(m_semaphore));
}

11
kernel/kernel/Networking/UDPSocket.cpp
View File

@ -1,4 +1,3 @@
#include <kernel/LockGuard.h>
#include <kernel/Memory/Heap.h>
#include <kernel/Networking/UDPSocket.h>
#include <kernel/Thread.h>
@ -46,7 +45,7 @@ namespace Kernel
//auto& header = packet.as<const UDPHeader>();
auto payload = packet.slice(sizeof(UDPHeader));
LockGuard _(m_packet_lock);
SpinLockGuard _(m_packet_lock);
if (m_packets.full())
{
@ -88,12 +87,12 @@ namespace Kernel
}
ASSERT(m_port != PORT_NONE);
LockGuard _(m_packet_lock);
auto state = m_packet_lock.lock();
while (m_packets.empty())
{
LockFreeGuard free(m_packet_lock);
m_packet_lock.unlock(state);
TRY(Thread::current().block_or_eintr_indefinite(m_packet_semaphore));
state = m_packet_lock.lock();
}
auto packet_info = m_packets.front();
@ -115,6 +114,8 @@ namespace Kernel
m_packet_total_size -= packet_info.packet_size;
m_packet_lock.unlock(state);
if (address && address_len)
{
if (*address_len > (socklen_t)sizeof(sockaddr_storage))

39
kernel/kernel/Networking/UNIX/Socket.cpp
View File

@ -51,9 +51,10 @@ namespace Kernel
{
if (is_bound() && !is_bound_to_unused())
{
LockGuard _(s_bound_socket_lock);
if (s_bound_sockets.contains(m_bound_path))
s_bound_sockets.remove(m_bound_path);
SpinLockGuard _(s_bound_socket_lock);
auto it = s_bound_sockets.find(m_bound_path);
if (it != s_bound_sockets.end())
s_bound_sockets.remove(it);
}
}
@ -71,7 +72,7 @@ namespace Kernel
BAN::RefPtr<UnixDomainSocket> pending;
{
LockGuard _(connection_info.pending_lock);
SpinLockGuard _(connection_info.pending_lock);
pending = connection_info.pending_connections.front();
connection_info.pending_connections.pop();
connection_info.pending_semaphore.unblock();
@ -120,10 +121,11 @@ namespace Kernel
BAN::RefPtr<UnixDomainSocket> target;
{
LockGuard _(s_bound_socket_lock);
if (!s_bound_sockets.contains(file.canonical_path))
SpinLockGuard _(s_bound_socket_lock);
auto it = s_bound_sockets.find(file.canonical_path);
if (it == s_bound_sockets.end())
return BAN::Error::from_errno(ECONNREFUSED);
target = s_bound_sockets[file.canonical_path].lock();
target = it->value.lock();
if (!target)
return BAN::Error::from_errno(ECONNREFUSED);
}
@ -150,7 +152,7 @@ namespace Kernel
{
auto& target_info = target->m_info.get<ConnectionInfo>();
{
LockGuard _(target_info.pending_lock);
SpinLockGuard _(target_info.pending_lock);
if (target_info.pending_connections.size() < target_info.pending_connections.capacity())
{
MUST(target_info.pending_connections.push(this));
@ -205,7 +207,7 @@ namespace Kernel
O_RDWR
));
LockGuard _(s_bound_socket_lock);
SpinLockGuard _(s_bound_socket_lock);
ASSERT(!s_bound_sockets.contains(file.canonical_path));
TRY(s_bound_sockets.emplace(file.canonical_path, TRY(get_weak_ptr())));
m_bound_path = BAN::move(file.canonical_path);
@ -229,12 +231,12 @@ namespace Kernel
BAN::ErrorOr<void> UnixDomainSocket::add_packet(BAN::ConstByteSpan packet)
{
LockGuard _(m_lock);
auto state = m_packet_lock.lock();
while (m_packet_sizes.full() || m_packet_size_total + packet.size() > s_packet_buffer_size)
{
LockFreeGuard _(m_lock);
m_packet_lock.unlock(state);
TRY(Thread::current().block_or_eintr_indefinite(m_packet_semaphore));
state = m_packet_lock.lock();
}
uint8_t* packet_buffer = reinterpret_cast<uint8_t*>(m_packet_buffer->vaddr() + m_packet_size_total);
@ -245,6 +247,7 @@ namespace Kernel
m_packet_sizes.push(packet.size());
m_packet_semaphore.unblock();
m_packet_lock.unlock(state);
return {};
}
@ -318,10 +321,11 @@ namespace Kernel
canonical_path = BAN::move(file.canonical_path);
}
LockGuard _(s_bound_socket_lock);
if (!s_bound_sockets.contains(canonical_path))
SpinLockGuard _(s_bound_socket_lock);
auto it = s_bound_sockets.find(canonical_path);
if (it == s_bound_sockets.end())
return BAN::Error::from_errno(EDESTADDRREQ);
auto target = s_bound_sockets[canonical_path].lock();
auto target = it->value.lock();
if (!target)
return BAN::Error::from_errno(EDESTADDRREQ);
TRY(target->add_packet(message));
@ -338,10 +342,12 @@ namespace Kernel
return BAN::Error::from_errno(ENOTCONN);
}
auto state = m_packet_lock.lock();
while (m_packet_size_total == 0)
{
LockFreeGuard _(m_lock);
m_packet_lock.unlock(state);
TRY(Thread::current().block_or_eintr_indefinite(m_packet_semaphore));
state = m_packet_lock.lock();
}
uint8_t* packet_buffer = reinterpret_cast<uint8_t*>(m_packet_buffer->vaddr());
@ -360,6 +366,7 @@ namespace Kernel
m_packet_size_total -= nread;
m_packet_semaphore.unblock();
m_packet_lock.unlock(state);
return nread;
}

166
kernel/kernel/Process.cpp
View File

@ -7,11 +7,10 @@
#include <kernel/IDT.h>
#include <kernel/Input/KeyboardLayout.h>
#include <kernel/InterruptController.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Memory/FileBackedRegion.h>
#include <kernel/Memory/Heap.h>
#include <kernel/Memory/MemoryBackedRegion.h>
#include <kernel/Memory/PageTableScope.h>
#include <kernel/Process.h>
#include <kernel/Scheduler.h>
#include <kernel/Storage/StorageDevice.h>
@ -33,9 +32,9 @@ namespace Kernel
static BAN::Vector<Process*> s_processes;
static RecursiveSpinLock s_process_lock;
void Process::for_each_process(const BAN::Function<BAN::Iteration(Process&)>& callback)
static void for_each_process(const BAN::Function<BAN::Iteration(Process&)>& callback)
{
LockGuard _(s_process_lock);
SpinLockGuard _(s_process_lock);
for (auto* process : s_processes)
{
@ -46,9 +45,9 @@ namespace Kernel
}
}
void Process::for_each_process_in_session(pid_t sid, const BAN::Function<BAN::Iteration(Process&)>& callback)
static void for_each_process_in_session(pid_t sid, const BAN::Function<BAN::Iteration(Process&)>& callback)
{
LockGuard _(s_process_lock);
SpinLockGuard _(s_process_lock);
for (auto* process : s_processes)
{
@ -90,9 +89,10 @@ namespace Kernel
void Process::register_to_scheduler()
{
s_process_lock.lock();
{
SpinLockGuard _(s_process_lock);
MUST(s_processes.push_back(this));
s_process_lock.unlock();
}
for (auto* thread : m_threads)
MUST(Scheduler::get().add_thread(thread));
}
@ -138,8 +138,6 @@ namespace Kernel
char** argv = nullptr;
{
PageTableScope _(process->page_table());
size_t needed_bytes = sizeof(char*) * 2 + path.size() + 1;
if (auto rem = needed_bytes % PAGE_SIZE)
needed_bytes += PAGE_SIZE - rem;
@ -196,14 +194,14 @@ namespace Kernel
void Process::add_thread(Thread* thread)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
MUST(m_threads.push_back(thread));
}
void Process::cleanup_function()
{
{
LockGuard _(s_process_lock);
SpinLockGuard _(s_process_lock);
for (size_t i = 0; i < s_processes.size(); i++)
if (s_processes[i] == this)
s_processes.remove(i);
@ -217,7 +215,7 @@ namespace Kernel
while (m_exit_status.waiting > 0)
Scheduler::get().reschedule();
m_lock.lock();
m_process_lock.lock();
m_open_file_descriptors.close_all();
@ -256,7 +254,7 @@ namespace Kernel
void Process::exit(int status, int signal)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
m_exit_status.exit_code = __WGENEXITCODE(status, signal);
for (auto* thread : m_threads)
if (thread != &Thread::current())
@ -277,7 +275,7 @@ namespace Kernel
meminfo.phys_pages = 0;
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
for (auto* thread : m_threads)
{
meminfo.virt_pages += thread->virtual_page_count();
@ -326,13 +324,13 @@ namespace Kernel
size_t Process::proc_cmdline(off_t offset, BAN::ByteSpan buffer) const
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return read_from_vec_of_str(m_cmdline, offset, buffer);
}
size_t Process::proc_environ(off_t offset, BAN::ByteSpan buffer) const
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return read_from_vec_of_str(m_environ, offset, buffer);
}
@ -345,7 +343,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_gettermios(::termios* termios)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(termios, sizeof(::termios)));
@ -364,7 +362,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_settermios(const ::termios* termios)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(termios, sizeof(::termios)));
@ -403,7 +401,7 @@ namespace Kernel
{
auto page_table = BAN::UniqPtr<PageTable>::adopt(TRY(PageTable::create_userspace()));
LockGuard _(m_lock);
LockGuard _(m_process_lock);
BAN::String working_directory;
TRY(working_directory.append(m_working_directory));
@ -443,7 +441,7 @@ namespace Kernel
{
// NOTE: We scope everything for automatic deletion
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
auto loadable_elf = TRY(load_elf_for_exec(m_credentials, path, m_working_directory, page_table()));
@ -579,7 +577,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_wait(pid_t pid, int* stat_loc, int options)
{
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(stat_loc, sizeof(int)));
}
@ -612,7 +610,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_nanosleep(const timespec* rqtp, timespec* rmtp)
{
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(rqtp, sizeof(timespec)));
if (rmtp)
TRY(validate_pointer_access(rmtp, sizeof(timespec)));
@ -654,7 +652,7 @@ namespace Kernel
return BAN::Error::from_errno(ENOTSUP);
}
LockGuard _(m_lock);
LockGuard _(m_process_lock);
auto absolute_path = TRY(absolute_path_of(path));
@ -683,7 +681,7 @@ namespace Kernel
{
ASSERT(&Process::current() == this);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
if (Thread::current().stack().contains(address))
{
@ -711,13 +709,13 @@ namespace Kernel
BAN::ErrorOr<long> Process::open_inode(BAN::RefPtr<Inode> inode, int flags)
{
ASSERT(inode);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return TRY(m_open_file_descriptors.open(inode, flags));
}
BAN::ErrorOr<long> Process::open_file(BAN::StringView path, int flags, mode_t mode)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
BAN::String absolute_path = TRY(absolute_path_of(path));
@ -750,14 +748,14 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_open(const char* path, int flags, mode_t mode)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
return open_file(path, flags, mode);
}
BAN::ErrorOr<long> Process::sys_openat(int fd, const char* path, int flags, mode_t mode)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
@ -773,28 +771,28 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_close(int fd)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(m_open_file_descriptors.close(fd));
return 0;
}
BAN::ErrorOr<long> Process::sys_read(int fd, void* buffer, size_t count)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(buffer, count));
return TRY(m_open_file_descriptors.read(fd, BAN::ByteSpan((uint8_t*)buffer, count)));
}
BAN::ErrorOr<long> Process::sys_write(int fd, const void* buffer, size_t count)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(buffer, count));
return TRY(m_open_file_descriptors.write(fd, BAN::ByteSpan((uint8_t*)buffer, count)));
}
BAN::ErrorOr<long> Process::sys_create(const char* path, mode_t mode)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
TRY(create_file_or_dir(path, mode));
return 0;
@ -802,7 +800,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_create_dir(const char* path, mode_t mode)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
BAN::StringView path_sv(path);
if (!path_sv.empty() && path_sv.back() == '/')
@ -813,7 +811,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_unlink(const char* path)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
auto absolute_path = TRY(absolute_path_of(path));
@ -846,7 +844,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_readlink(const char* path, char* buffer, size_t bufsize)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
TRY(validate_pointer_access(buffer, bufsize));
@ -857,7 +855,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_readlinkat(int fd, const char* path, char* buffer, size_t bufsize)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
TRY(validate_pointer_access(buffer, bufsize));
@ -874,7 +872,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_pread(int fd, void* buffer, size_t count, off_t offset)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(buffer, count));
auto inode = TRY(m_open_file_descriptors.inode_of(fd));
return TRY(inode->read(offset, { (uint8_t*)buffer, count }));
@ -885,7 +883,7 @@ namespace Kernel
if (mode & S_IFMASK)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
auto absolute_path = TRY(absolute_path_of(path));
@ -897,7 +895,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_chown(const char* path, uid_t uid, gid_t gid)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
auto absolute_path = TRY(absolute_path_of(path));
@ -909,7 +907,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_socket(int domain, int type, int protocol)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return TRY(m_open_file_descriptors.socket(domain, type, protocol));
}
@ -920,7 +918,7 @@ namespace Kernel
if (!address && address_len)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
if (address)
{
TRY(validate_pointer_access(address_len, sizeof(*address_len)));
@ -936,7 +934,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_bind(int socket, const sockaddr* address, socklen_t address_len)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(address, address_len));
auto inode = TRY(m_open_file_descriptors.inode_of(socket));
@ -949,7 +947,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_connect(int socket, const sockaddr* address, socklen_t address_len)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(address, address_len));
auto inode = TRY(m_open_file_descriptors.inode_of(socket));
@ -962,7 +960,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_listen(int socket, int backlog)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
auto inode = TRY(m_open_file_descriptors.inode_of(socket));
if (!inode->mode().ifsock())
@ -974,7 +972,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_sendto(const sys_sendto_t* arguments)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(arguments, sizeof(sys_sendto_t)));
TRY(validate_pointer_access(arguments->message, arguments->length));
TRY(validate_pointer_access(arguments->dest_addr, arguments->dest_len));
@ -994,7 +992,7 @@ namespace Kernel
if (!arguments->address && arguments->address_len)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(arguments, sizeof(sys_recvfrom_t)));
TRY(validate_pointer_access(arguments->buffer, arguments->length));
if (arguments->address)
@ -1013,14 +1011,14 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_ioctl(int fildes, int request, void* arg)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
auto inode = TRY(m_open_file_descriptors.inode_of(fildes));
return TRY(inode->ioctl(request, arg));
}
BAN::ErrorOr<long> Process::sys_pselect(sys_pselect_t* arguments)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(arguments, sizeof(sys_pselect_t)));
if (arguments->readfds)
@ -1089,7 +1087,7 @@ namespace Kernel
if (set_bits > 0)
break;
LockFreeGuard free(m_lock);
LockFreeGuard free(m_process_lock);
SystemTimer::get().sleep(1);
}
@ -1115,7 +1113,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_pipe(int fildes[2])
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(fildes, sizeof(int) * 2));
TRY(m_open_file_descriptors.pipe(fildes));
return 0;
@ -1123,32 +1121,32 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_dup(int fildes)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return TRY(m_open_file_descriptors.dup(fildes));
}
BAN::ErrorOr<long> Process::sys_dup2(int fildes, int fildes2)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return TRY(m_open_file_descriptors.dup2(fildes, fildes2));
}
BAN::ErrorOr<long> Process::sys_fcntl(int fildes, int cmd, int extra)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return TRY(m_open_file_descriptors.fcntl(fildes, cmd, extra));
}
BAN::ErrorOr<long> Process::sys_seek(int fd, off_t offset, int whence)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(m_open_file_descriptors.seek(fd, offset, whence));
return 0;
}
BAN::ErrorOr<long> Process::sys_tell(int fd)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
return TRY(m_open_file_descriptors.tell(fd));
}
@ -1156,7 +1154,7 @@ namespace Kernel
{
BAN::String absolute_source, absolute_target;
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(absolute_source.append(TRY(absolute_path_of(source))));
TRY(absolute_target.append(TRY(absolute_path_of(target))));
}
@ -1166,7 +1164,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_fstat(int fd, struct stat* buf)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(buf, sizeof(struct stat)));
TRY(m_open_file_descriptors.fstat(fd, buf));
return 0;
@ -1174,7 +1172,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_fstatat(int fd, const char* path, struct stat* buf, int flag)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(buf, sizeof(struct stat)));
TRY(m_open_file_descriptors.fstatat(fd, path, buf, flag));
return 0;
@ -1182,7 +1180,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_stat(const char* path, struct stat* buf, int flag)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(buf, sizeof(struct stat)));
TRY(m_open_file_descriptors.stat(TRY(absolute_path_of(path)), buf, flag));
return 0;
@ -1235,7 +1233,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_readdir(int fd, DirectoryEntryList* list, size_t list_size)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(list, list_size));
TRY(m_open_file_descriptors.read_dir_entries(fd, list, list_size));
return 0;
@ -1246,7 +1244,7 @@ namespace Kernel
BAN::String absolute_path;
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
absolute_path = TRY(absolute_path_of(path));
}
@ -1255,7 +1253,7 @@ namespace Kernel
if (!file.inode->mode().ifdir())
return BAN::Error::from_errno(ENOTDIR);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
m_working_directory = BAN::move(file.canonical_path);
return 0;
@ -1263,7 +1261,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_getpwd(char* buffer, size_t size)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(buffer, size));
@ -1279,7 +1277,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_mmap(const sys_mmap_t* args)
{
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(args, sizeof(sys_mmap_t)));
}
@ -1320,7 +1318,7 @@ namespace Kernel
region_type, page_flags
));
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(m_mapped_regions.push_back(BAN::move(region)));
return m_mapped_regions.back()->vaddr();
}
@ -1328,7 +1326,7 @@ namespace Kernel
if (args->addr != nullptr)
return BAN::Error::from_errno(ENOTSUP);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
auto inode = TRY(m_open_file_descriptors.inode_of(args->fildes));
@ -1376,7 +1374,7 @@ namespace Kernel
if (vaddr % PAGE_SIZE != 0)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
// FIXME: We should only map partial regions
for (size_t i = 0; i < m_mapped_regions.size(); i++)
@ -1395,7 +1393,7 @@ namespace Kernel
if (vaddr % PAGE_SIZE != 0)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
for (auto& mapped_region : m_mapped_regions)
if (mapped_region->overlaps(vaddr, len))
@ -1406,7 +1404,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_tty_ctrl(int fildes, int command, int flags)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
auto inode = TRY(m_open_file_descriptors.inode_of(fildes));
if (!inode->is_tty())
@ -1419,7 +1417,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_termid(char* buffer)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(buffer));
@ -1440,7 +1438,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_clock_gettime(clockid_t clock_id, timespec* tp)
{
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access(tp, sizeof(timespec)));
}
@ -1465,7 +1463,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_load_keymap(const char* path)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_string_access(path));
if (!m_credentials.is_superuser())
@ -1482,7 +1480,7 @@ namespace Kernel
return BAN::Error::from_errno(EINVAL);
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
TRY(validate_pointer_access((void*)handler, sizeof(handler)));
}
@ -1532,7 +1530,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_tcsetpgrp(int fd, pid_t pgrp)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
if (!m_controlling_terminal)
return BAN::Error::from_errno(ENOTTY);
@ -1568,7 +1566,7 @@ namespace Kernel
if (uid < 0 || uid >= 1'000'000'000)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
// If the process has appropriate privileges, setuid() shall set the real user ID, effective user ID, and the saved
// set-user-ID of the calling process to uid.
@ -1598,7 +1596,7 @@ namespace Kernel
if (gid < 0 || gid >= 1'000'000'000)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
// If the process has appropriate privileges, setgid() shall set the real group ID, effective group ID, and the saved
// set-group-ID of the calling process to gid.
@ -1626,7 +1624,7 @@ namespace Kernel
if (uid < 0 || uid >= 1'000'000'000)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
// If uid is equal to the real user ID or the saved set-user-ID, or if the process has appropriate privileges, seteuid()
// shall set the effective user ID of the calling process to uid; the real user ID and saved set-user-ID shall remain unchanged.
@ -1645,7 +1643,7 @@ namespace Kernel
if (gid < 0 || gid >= 1'000'000'000)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
// If gid is equal to the real group ID or the saved set-group-ID, or if the process has appropriate privileges, setegid()
// shall set the effective group ID of the calling process to gid; the real group ID, saved set-group-ID, and any
@ -1673,7 +1671,7 @@ namespace Kernel
// by the ruid and euid arguments. If ruid or euid is -1, the corresponding effective or real user ID of the current
// process shall be left unchanged.
LockGuard _(m_lock);
LockGuard _(m_process_lock);
// A process with appropriate privileges can set either ID to any value.
if (!m_credentials.is_superuser())
@ -1721,7 +1719,7 @@ namespace Kernel
// The real and effective group IDs may be set to different values in the same call.
LockGuard _(m_lock);
LockGuard _(m_process_lock);
// Only a process with appropriate privileges can set the real group ID and the effective group ID to any valid value.
if (!m_credentials.is_superuser())
@ -1754,7 +1752,7 @@ namespace Kernel
if (pgid < 0)
return BAN::Error::from_errno(EINVAL);
LockGuard _(m_lock);
LockGuard _(m_process_lock);
if (pid == 0)
pid = m_pid;
@ -1819,7 +1817,7 @@ namespace Kernel
BAN::ErrorOr<long> Process::sys_getpgid(pid_t pid)
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
if (pid == 0 || pid == m_pid)
return m_pgrp;
@ -1851,7 +1849,7 @@ namespace Kernel
BAN::ErrorOr<BAN::String> Process::absolute_path_of(BAN::StringView path) const
{
LockGuard _(m_lock);
LockGuard _(m_process_lock);
if (path.empty() || path == "."sv)
return m_working_directory;

7
kernel/kernel/Scheduler.cpp
View File

@ -35,9 +35,10 @@ namespace Kernel
BAN::ErrorOr<void> Scheduler::initialize()
{
ASSERT(s_instance == nullptr);
s_instance = new Scheduler();
ASSERT(s_instance);
s_instance->m_idle_thread = TRY(Thread::create_kernel([](void*) { for (;;) asm volatile("hlt"); }, nullptr, nullptr));
Scheduler* scheduler = new Scheduler();
ASSERT(scheduler);
scheduler->m_idle_thread = TRY(Thread::create_kernel([](void*) { for (;;) asm volatile("hlt"); }, nullptr, nullptr));
s_instance = scheduler;
return {};
}

86
kernel/kernel/SpinLock.cpp
View File

@ -1,86 +0,0 @@
#include <kernel/Scheduler.h>
#include <kernel/SpinLock.h>
namespace Kernel
{
void SpinLock::lock()
{
pid_t tid = Scheduler::current_tid();
ASSERT(tid != m_locker);
while (!m_locker.compare_exchange(-1, tid))
Scheduler::get().reschedule();
}
void SpinLock::unlock()
{
ASSERT(m_locker == Scheduler::current_tid());
m_locker = -1;
}
bool SpinLock::is_locked() const
{
return m_locker != -1;
}
void RecursiveSpinLock::lock()
{
pid_t tid = Scheduler::current_tid();
if (m_locker != tid)
{
while (!m_locker.compare_exchange(-1, tid))
Scheduler::get().reschedule();
ASSERT(m_lock_depth == 0);
}
m_lock_depth++;
}
void RecursiveSpinLock::unlock()
{
ASSERT(m_lock_depth > 0);
ASSERT(m_locker == Scheduler::current_tid());
if (--m_lock_depth == 0)
m_locker = -1;
}
bool RecursiveSpinLock::is_locked() const
{
return m_locker != -1;
}
void RecursivePrioritySpinLock::lock()
{
pid_t tid = Scheduler::current_tid();
bool has_priority = !Thread::current().is_userspace();
if (has_priority)
m_queue_length++;
if (m_locker != tid)
{
while (!((has_priority || m_queue_length == 0) && m_locker.compare_exchange(-1, tid)))
Scheduler::get().reschedule();
ASSERT(m_lock_depth == 0);
}
m_lock_depth++;
}
void RecursivePrioritySpinLock::unlock()
{
ASSERT(m_lock_depth > 0);
ASSERT(m_locker == Scheduler::current_tid());
bool has_priority = !Thread::current().is_userspace();
if (has_priority)
m_queue_length--;
if (--m_lock_depth == 0)
m_locker = -1;
}
bool RecursivePrioritySpinLock::is_locked() const
{
return m_locker != -1;
}
}

6
kernel/kernel/Storage/ATA/ATABus.cpp
View File

@ -2,7 +2,7 @@
#include <kernel/IDT.h>
#include <kernel/InterruptController.h>
#include <kernel/IO.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Storage/ATA/ATABus.h>
#include <kernel/Storage/ATA/ATADefinitions.h>
#include <kernel/Storage/ATA/ATADevice.h>
@ -261,7 +261,7 @@ namespace Kernel
if (lba + sector_count > device.sector_count())
return BAN::Error::from_error_code(ErrorCode::Storage_Boundaries);
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (lba < (1 << 28))
{
@ -298,7 +298,7 @@ namespace Kernel
if (lba + sector_count > device.sector_count())
return BAN::Error::from_error_code(ErrorCode::Storage_Boundaries);
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (lba < (1 << 28))
{

36
kernel/kernel/Storage/DiskCache.cpp
View File

@ -1,5 +1,5 @@
#include <kernel/CriticalScope.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Memory/Heap.h>
#include <kernel/Memory/PageTable.h>
#include <kernel/Storage/DiskCache.h>
@ -32,10 +32,6 @@ namespace Kernel
uint64_t page_cache_offset = sector % sectors_per_page;
uint64_t page_cache_start = sector - page_cache_offset;
PageTable& page_table = PageTable::current();
LockGuard page_table_locker(page_table);
ASSERT(page_table.is_page_free(0));
for (auto& cache : m_cache)
{
if (cache.first_sector < page_cache_start)
@ -46,10 +42,9 @@ namespace Kernel
if (!(cache.sector_mask & (1 << page_cache_offset)))
continue;
CriticalScope _;
PageTable::map_fast_page(cache.paddr);
PageTable::with_fast_page(cache.paddr, [&] {
memcpy(buffer.data(), PageTable::fast_page_as_ptr(page_cache_offset * m_sector_size), m_sector_size);
PageTable::unmap_fast_page();
});
return true;
}
@ -64,10 +59,6 @@ namespace Kernel
uint64_t page_cache_offset = sector % sectors_per_page;
uint64_t page_cache_start = sector - page_cache_offset;
PageTable& page_table = PageTable::current();
LockGuard page_table_locker(page_table);
ASSERT(page_table.is_page_free(0));
size_t index = 0;
// Search the cache if the have this sector in memory
@ -80,12 +71,9 @@ namespace Kernel
if (cache.first_sector > page_cache_start)
break;
{
CriticalScope _;
PageTable::map_fast_page(cache.paddr);
PageTable::with_fast_page(cache.paddr, [&] {
memcpy(PageTable::fast_page_as_ptr(page_cache_offset * m_sector_size), buffer.data(), m_sector_size);
PageTable::unmap_fast_page();
}
});
cache.sector_mask |= 1 << page_cache_offset;
if (dirty)
@ -111,12 +99,9 @@ namespace Kernel
return ret.error();
}
{
CriticalScope _;
PageTable::map_fast_page(cache.paddr);
PageTable::with_fast_page(cache.paddr, [&] {
memcpy(PageTable::fast_page_as_ptr(page_cache_offset * m_sector_size), buffer.data(), m_sector_size);
PageTable::unmap_fast_page();
}
});
return {};
}
@ -128,12 +113,9 @@ namespace Kernel
if (cache.dirty_mask == 0)
continue;
{
CriticalScope _;
PageTable::map_fast_page(cache.paddr);
PageTable::with_fast_page(cache.paddr, [&] {
memcpy(m_sync_cache.data(), PageTable::fast_page_as_ptr(), PAGE_SIZE);
PageTable::unmap_fast_page();
}
});
uint8_t sector_start = 0;
uint8_t sector_count = 0;

4
kernel/kernel/Storage/NVMe/Queue.cpp
View File

@ -1,4 +1,4 @@
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Scheduler.h>
#include <kernel/Storage/NVMe/Queue.h>
#include <kernel/Timer/Timer.h>
@ -44,7 +44,7 @@ namespace Kernel
uint16_t NVMeQueue::submit_command(NVMe::SubmissionQueueEntry& sqe)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(m_done == false);
m_status = 0;

18
kernel/kernel/Storage/StorageDevice.cpp
View File

@ -4,7 +4,7 @@
#include <BAN/UTF8.h>
#include <kernel/FS/DevFS/FileSystem.h>
#include <kernel/FS/VirtualFileSystem.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/PCI.h>
#include <kernel/Storage/StorageDevice.h>
#include <kernel/Thread.h>
@ -150,7 +150,7 @@ namespace Kernel
BAN::Vector<uint8_t> lba1;
TRY(lba1.resize(sector_size()));
TRY(read_sectors(1, 1, lba1.span()));
TRY(read_sectors(1, 1, BAN::ByteSpan { lba1.span() }));
const GPTHeader& header = *(const GPTHeader*)lba1.data();
if (!is_valid_gpt_header(header, sector_size()))
@ -165,7 +165,7 @@ namespace Kernel
BAN::Vector<uint8_t> entry_array;
TRY(entry_array.resize(size));
TRY(read_sectors(header.partition_entry_lba, size / sector_size(), entry_array.span()));
TRY(read_sectors(header.partition_entry_lba, size / sector_size(), BAN::ByteSpan { entry_array.span() }));
if (!is_valid_gpt_crc32(header, lba1, entry_array))
return BAN::Error::from_error_code(ErrorCode::Storage_GPTHeader);
@ -207,14 +207,14 @@ namespace Kernel
void StorageDevice::add_disk_cache()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
ASSERT(!m_disk_cache.has_value());
m_disk_cache.emplace(sector_size(), *this);
}
BAN::ErrorOr<void> StorageDevice::sync_disk_cache()
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (m_disk_cache.has_value())
TRY(m_disk_cache->sync());
return {};
@ -225,14 +225,14 @@ namespace Kernel
ASSERT(buffer.size() >= sector_count * sector_size());
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!m_disk_cache.has_value())
return read_sectors_impl(lba, sector_count, buffer);
}
for (uint64_t offset = 0; offset < sector_count; offset++)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
auto sector_buffer = buffer.slice(offset * sector_size(), sector_size());
if (m_disk_cache->read_from_cache(lba + offset, sector_buffer))
continue;
@ -248,14 +248,14 @@ namespace Kernel
ASSERT(buffer.size() >= sector_count * sector_size());
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (!m_disk_cache.has_value())
return write_sectors_impl(lba, sector_count, buffer);
}
for (uint8_t offset = 0; offset < sector_count; offset++)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
auto sector_buffer = buffer.slice(offset * sector_size(), sector_size());
if (m_disk_cache->write_to_cache(lba + offset, sector_buffer, true).is_error())
TRY(write_sectors_impl(lba + offset, 1, sector_buffer));

23
kernel/kernel/Terminal/TTY.cpp
View File

@ -4,7 +4,7 @@
#include <kernel/Debug.h>
#include <kernel/FS/DevFS/FileSystem.h>
#include <kernel/FS/VirtualFileSystem.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Process.h>
#include <kernel/Terminal/TTY.h>
@ -122,7 +122,7 @@ namespace Kernel
void TTY::on_key_event(Input::KeyEvent event)
{
LockGuard _(m_lock);
LockGuard _(m_mutex);
if (event.released())
return;
@ -205,7 +205,7 @@ namespace Kernel
if (ch == 0)
return;
LockGuard _(m_lock);
LockGuard _(m_mutex);
// ^C
if (ch == '\x03')
@ -310,24 +310,17 @@ namespace Kernel
void TTY::putchar(uint8_t ch)
{
SpinLockGuard _(m_write_lock);
if (m_tty_ctrl.draw_graphics)
putchar_impl(ch);
}
BAN::ErrorOr<size_t> TTY::read_impl(off_t, BAN::ByteSpan buffer)
{
LockGuard _(m_lock);
while (!m_output.flush)
{
// FIXME: this is very hacky way to unlock lock temporarily
uint32_t depth = m_lock.lock_depth();
for (uint32_t i = 0; i < depth; i++)
m_lock.unlock();
auto eintr = Thread::current().block_or_eintr_indefinite(m_output.semaphore);
for (uint32_t i = 0; i < depth; i++)
m_lock.lock();
if (eintr.is_error())
return eintr.release_error();
LockFreeGuard _(m_mutex);
TRY(Thread::current().block_or_eintr_indefinite(m_output.semaphore));
}
if (m_output.bytes == 0)
@ -352,7 +345,7 @@ namespace Kernel
BAN::ErrorOr<size_t> TTY::write_impl(off_t, BAN::ConstByteSpan buffer)
{
LockGuard _(m_lock);
SpinLockGuard _(m_write_lock);
for (size_t i = 0; i < buffer.size(); i++)
putchar(buffer[i]);
return buffer.size();
@ -361,7 +354,7 @@ namespace Kernel
void TTY::putchar_current(uint8_t ch)
{
ASSERT(s_tty);
LockGuard _(s_tty->m_lock);
SpinLockGuard _(s_tty->m_write_lock);
s_tty->putchar(ch);
}

4
kernel/kernel/Terminal/VirtualTTY.cpp
View File

@ -4,7 +4,7 @@
#include <kernel/Debug.h>
#include <kernel/Device/DeviceNumbers.h>
#include <kernel/FS/DevFS/FileSystem.h>
#include <kernel/LockGuard.h>
#include <kernel/Lock/LockGuard.h>
#include <kernel/Process.h>
#include <kernel/Terminal/VirtualTTY.h>
@ -306,8 +306,6 @@ namespace Kernel
void VirtualTTY::putchar_impl(uint8_t ch)
{
ASSERT(m_lock.is_locked());
uint32_t codepoint = ch;
switch (m_state)

1
kernel/kernel/Thread.cpp
View File

@ -4,7 +4,6 @@
#include <kernel/InterruptController.h>
#include <kernel/InterruptStack.h>
#include <kernel/Memory/kmalloc.h>
#include <kernel/Memory/PageTableScope.h>
#include <kernel/Process.h>
#include <kernel/Scheduler.h>
#include <kernel/Thread.h>