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fix(kernel/vfs): 🎉 a complete rewrite of the vfs

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This is the fourth time re-writing the VFS, hope this will be the last. Tried to make it as modular as possible so this won't be necessary in the future. 🙏

This change required the entire kernel code to be modified.
This commit is contained in:
EnderIce2
2025-05-13 15:59:12 +00:00
parent 83a7f83f81
commit 557c7e6235
83 changed files with 3252 additions and 2487 deletions
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22
Kernel/core/driver/api.cpp
View File

@ -191,11 +191,11 @@ namespace v0
/* --------- */
dev_t RegisterFileSystem(dev_t DriverID, FileSystemInfo *Info, struct Inode *Root)
dev_t RegisterFileSystem(dev_t DriverID, FileSystemInfo *Info)
{
dbg_api("%d, %#lx, %#lx", DriverID, Info, Root);
dbg_api("%d, %#lx", DriverID, Info);
return fs->RegisterFileSystem(Info, Root);
return fs->RegisterFileSystem(Info);
}
int UnregisterFileSystem(dev_t DriverID, dev_t Device)
@ -710,6 +710,20 @@ namespace v0
return DriverManager->ReportInputEvent(DriverID, Report);
}
dev_t RegisterBlockDevice(dev_t DriverID, struct BlockDevice *Device)
{
dbg_api("%d, %#lx", DriverID, Device);
return DriverManager->RegisterBlockDevice(DriverID, Device);
}
int UnregisterBlockDevice(dev_t DriverID, dev_t DeviceID)
{
dbg_api("%d, %d", DriverID, DeviceID);
return DriverManager->UnregisterBlockDevice(DriverID, DeviceID);
}
}
struct APISymbols
@ -777,6 +791,8 @@ static struct APISymbols APISymbols_v0[] = {
{"__RegisterDevice", (void *)v0::RegisterDevice},
{"__UnregisterDevice", (void *)v0::UnregisterDevice},
{"__ReportInputEvent", (void *)v0::ReportInputEvent},
{"__RegisterBlockDevice", (void *)v0::RegisterBlockDevice},
{"__UnregisterBlockDevice", (void *)v0::UnregisterBlockDevice},
};
long __KernelUndefinedFunction(long arg0, long arg1, long arg2, long arg3,

726
Kernel/core/driver/daemon.cpp
View File

@ -1,726 +0,0 @@
/*
This file is part of Fennix Kernel.
Fennix Kernel is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
*/
#include <driver.hpp>
#include <interface/driver.h>
#include <interface/input.h>
#include <memory.hpp>
#include <stropts.h>
#include <ints.hpp>
#include <task.hpp>
#include <printf.h>
#include <exec.hpp>
#include <rand.hpp>
#include <cwalk.h>
#include <md5.h>
#include "../../kernel.h"
using namespace vfs;
namespace Driver
{
/**
* maj = 0
* min:
* 0 - <ROOT>
* 1 - /proc/self
*
* maj = 1
* min:
* 0 - /dev/input/keyboard
* 1 - /dev/input/mouse
* ..- /dev/input/eventN
*/
int __fs_Lookup(struct Inode *_Parent, const char *Name, struct Inode **Result)
{
func("%#lx %s %#lx", _Parent, Name, Result);
assert(_Parent != nullptr);
const char *basename;
size_t length;
cwk_path_get_basename(Name, &basename, &length);
if (basename == NULL)
{
error("Invalid name %s", Name);
return -EINVAL;
}
auto Parent = (Manager::DeviceInode *)_Parent;
for (const auto &child : Parent->Children)
{
debug("Comparing %s with %s", basename, child->Name.c_str());
if (strcmp(child->Name.c_str(), basename) != 0)
continue;
*Result = &child->Node;
return 0;
}
debug("Not found %s", Name);
return -ENOENT;
}
int __fs_Create(struct Inode *_Parent, const char *Name, mode_t Mode, struct Inode **Result)
{
func("%#lx %s %d", _Parent, Name, Mode);
assert(_Parent != nullptr);
/* We expect to be /dev or children of it */
auto Parent = (Manager::DeviceInode *)_Parent;
auto _dev = new Manager::DeviceInode;
_dev->Parent = nullptr;
_dev->ParentInode = _Parent;
_dev->Name = Name;
_dev->Node.Device = Parent->Node.Device;
_dev->Node.Mode = Mode;
_dev->Node.Index = Parent->Node.Index + Parent->Children.size();
_dev->Node.Offset = Parent->Children.size();
Parent->Children.push_back(_dev);
*Result = &_dev->Node;
return 0;
}
ssize_t __fs_Read(struct Inode *Node, void *Buffer, size_t Size, off_t Offset)
{
func("%#lx %d %d", Node, Size, Offset);
switch (Node->GetMajor())
{
case 1:
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
{
if (Size < sizeof(KeyboardReport))
return -EINVAL;
size_t nReads = Size / sizeof(KeyboardReport);
KeyboardReport *report = (KeyboardReport *)Buffer;
while (DriverManager->GlobalKeyboardInputReports.Count() == 0)
TaskManager->Yield();
DriverManager->GlobalKeyboardInputReports.Read(report, nReads);
return sizeof(KeyboardReport) * nReads;
}
case 1: /* /dev/input/mouse */
{
if (Size < sizeof(MouseReport))
return -EINVAL;
size_t nReads = Size / sizeof(MouseReport);
MouseReport *report = (MouseReport *)Buffer;
while (DriverManager->GlobalMouseInputReports.Count() == 0)
TaskManager->Yield();
DriverManager->GlobalMouseInputReports.Read(report, nReads);
return sizeof(MouseReport) * nReads;
}
default:
return -ENOENT;
};
}
default:
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Read, -ENOTSUP);
return dOps->second.Ops->Read(Node, Buffer, Size, Offset);
}
}
}
ssize_t __fs_Write(struct Inode *Node, const void *Buffer, size_t Size, off_t Offset)
{
func("%#lx %p %d %d", Node, Buffer, Size, Offset);
switch (Node->GetMajor())
{
case 1:
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
{
return -ENOTSUP;
}
case 1: /* /dev/input/mouse */
{
return -ENOTSUP;
}
default:
return -ENOENT;
};
}
default:
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Write, -ENOTSUP);
return dOps->second.Ops->Write(Node, Buffer, Size, Offset);
}
}
}
int __fs_Open(struct Inode *Node, int Flags, mode_t Mode)
{
func("%#lx %d %d", Node, Flags, Mode);
switch (Node->GetMajor())
{
case 1:
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
case 1: /* /dev/input/mouse */
return -ENOTSUP;
default:
return -ENOENT;
};
}
default:
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Open, -ENOTSUP);
return dOps->second.Ops->Open(Node, Flags, Mode);
}
}
}
int __fs_Close(struct Inode *Node)
{
func("%#lx", Node);
switch (Node->GetMajor())
{
case 1:
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
case 1: /* /dev/input/mouse */
return -ENOTSUP;
default:
return -ENOENT;
};
}
default:
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Close, -ENOTSUP);
return dOps->second.Ops->Close(Node);
}
}
}
int __fs_Ioctl(struct Inode *Node, unsigned long Request, void *Argp)
{
func("%#lx %lu %#lx", Node, Request, Argp);
switch (Node->GetMajor())
{
case 1:
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
case 1: /* /dev/input/mouse */
return -ENOSYS;
default:
return -ENOENT;
};
}
default:
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Ioctl, -ENOTSUP);
return dOps->second.Ops->Ioctl(Node, Request, Argp);
}
}
}
__no_sanitize("alignment")
ssize_t __fs_Readdir(struct Inode *_Node, struct kdirent *Buffer, size_t Size, off_t Offset, off_t Entries)
{
func("%#lx %#lx %d %d %d", _Node, Buffer, Size, Offset, Entries);
auto Node = (Manager::DeviceInode *)_Node;
off_t realOffset = Offset;
size_t totalSize = 0;
uint16_t reclen = 0;
struct kdirent *ent = nullptr;
if (Offset == 0)
{
reclen = (uint16_t)(offsetof(struct kdirent, d_name) + strlen(".") + 1);
if (totalSize + reclen >= Size)
return -EINVAL;
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
ent->d_ino = Node->Node.Index;
ent->d_off = Offset++;
ent->d_reclen = reclen;
ent->d_type = DT_DIR;
strcpy(ent->d_name, ".");
totalSize += reclen;
}
if (Offset <= 1)
{
reclen = (uint16_t)(offsetof(struct kdirent, d_name) + strlen("..") + 1);
if (totalSize + reclen >= Size)
{
if (realOffset == 1)
return -EINVAL;
return totalSize;
}
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
if (Node->Parent)
ent->d_ino = Node->Parent->Node->Index;
else if (Node->ParentInode)
ent->d_ino = Node->ParentInode->Index;
else
{
warn("Parent is null for %s", Node->Name.c_str());
ent->d_ino = Node->Node.Index;
}
ent->d_off = Offset++;
ent->d_reclen = reclen;
ent->d_type = DT_DIR;
strcpy(ent->d_name, "..");
totalSize += reclen;
}
if (!S_ISDIR(Node->Node.Mode))
return -ENOTDIR;
if ((Offset >= 2 ? (Offset - 2) : Offset) > (off_t)Node->Children.size())
return -EINVAL;
off_t entries = 0;
for (const auto &var : Node->Children)
{
debug("iterating \"%s\" inside \"%s\"", var->Name.c_str(), Node->Name.c_str());
if (var->Node.Offset < realOffset)
{
debug("skipping \"%s\" (%d < %d)", var->Name.c_str(), var->Node.Offset, Offset);
continue;
}
if (entries >= Entries)
break;
reclen = (uint16_t)(offsetof(struct kdirent, d_name) + strlen(var->Name.c_str()) + 1);
if (totalSize + reclen >= Size)
break;
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
ent->d_ino = var->Node.Index;
ent->d_off = var->Node.Offset;
ent->d_reclen = reclen;
ent->d_type = IFTODT(var->Node.Mode);
strncpy(ent->d_name, var->Name.c_str(), strlen(var->Name.c_str()));
totalSize += reclen;
entries++;
}
if (totalSize + sizeof(struct kdirent) >= Size)
return totalSize;
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
ent->d_ino = 0;
ent->d_off = 0;
ent->d_reclen = 0;
ent->d_type = DT_UNKNOWN;
ent->d_name[0] = '\0';
return totalSize;
}
void ManagerDaemonWrapper() { DriverManager->Daemon(); }
void Manager::Daemon()
{
while (true)
{
TaskManager->Sleep(1000);
}
}
dev_t Manager::RegisterInputDevice(std::unordered_map<dev_t, DriverHandlers> *dop,
dev_t DriverID, size_t i, const InodeOperations *Operations)
{
std::string prefix = "event";
for (size_t j = 0; j < 128; j++)
{
std::string deviceName = prefix + std::to_string(j);
FileNode *node = fs->GetByPath(deviceName.c_str(), devInputNode);
if (node)
continue;
/* c rwx r-- r-- */
mode_t mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFCHR;
node = fs->ForceCreate(devInputNode, deviceName.c_str(), mode);
node->Node->SetDevice(DriverID, i);
DriverHandlers dh{};
dh.Ops = Operations;
dh.Node = node->Node;
dh.InputReports = new RingBuffer<InputReport>(16);
dop->insert({i, std::move(dh)});
return i;
}
ReturnLogError(-1, "No available slots for device %d", DriverID);
return -1; /* -Werror=return-type */
}
dev_t Manager::RegisterBlockDevice(std::unordered_map<dev_t, DriverHandlers> *dop,
dev_t DriverID, size_t i, const InodeOperations *Operations)
{
std::string prefix = "event";
for (size_t j = 0; j < 128; j++)
{
std::string deviceName = prefix + std::to_string(j);
FileNode *node = fs->GetByPath(deviceName.c_str(), devInputNode);
if (node)
continue;
/* c rwx r-- r-- */
mode_t mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFBLK;
node = fs->ForceCreate(devInputNode, deviceName.c_str(), mode);
node->Node->SetDevice(DriverID, i);
DriverHandlers dh{};
dh.Ops = Operations;
dh.Node = node->Node;
dh.InputReports = new RingBuffer<InputReport>(16);
dop->insert({i, std::move(dh)});
return i;
}
ReturnLogError(-1, "No available slots for device %d", DriverID);
return -1; /* -Werror=return-type */
}
dev_t Manager::RegisterDevice(dev_t DriverID, DeviceType Type, const InodeOperations *Operations)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
for (size_t i = 0; i < 128; i++)
{
const auto dOps = dop->find(i);
const auto dOpsEnd = dop->end();
if (dOps != dOpsEnd)
continue;
DeviceType devType = (DeviceType)(Type & DEVICE_TYPE_MASK);
switch (devType)
{
case DEVICE_TYPE_INPUT:
return RegisterInputDevice(dop, DriverID, i, Operations);
case DEVICE_TYPE_BLOCK:
return RegisterBlockDevice(dop, DriverID, i, Operations);
default:
ReturnLogError(-1, "Invalid device type %d", Type);
}
}
ReturnLogError(-1, "No available slots for device %d", DriverID);
}
dev_t Manager::CreateDeviceFile(dev_t DriverID, const char *name, mode_t mode, const InodeOperations *Operations)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
for (size_t i = 0; i < 128; i++)
{
const auto dOps = dop->find(i);
if (dOps != dop->end())
continue;
FileNode *node = fs->GetByPath(name, devNode);
if (node)
ReturnLogError(-EEXIST, "Device file %s already exists", name);
node = fs->Create(devNode, name, mode);
if (node == nullptr)
ReturnLogError(-ENOMEM, "Failed to create device file %s", name);
node->Node->SetDevice(DriverID, i);
DriverHandlers dh{};
dh.Ops = Operations;
dh.Node = node->Node;
dh.InputReports = new RingBuffer<InputReport>(16);
dop->insert({i, std::move(dh)});
return i;
}
ReturnLogError(-1, "No available slots for device %d", DriverID);
return -1; /* -Werror=return-type */
}
int Manager::UnregisterDevice(dev_t DriverID, dev_t Device)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
const auto dOps = dop->find(Device);
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Device);
dop->erase(dOps);
fixme("remove eventX from /dev/input");
fixme("delete InputReports");
return 0;
}
void *Manager::AllocateMemory(dev_t DriverID, size_t Pages)
{
auto itr = Drivers.find(DriverID);
assert(itr != Drivers.end());
void *ptr = itr->second.vma->RequestPages(Pages);
memset(ptr, 0, FROM_PAGES(Pages));
return ptr;
}
void Manager::FreeMemory(dev_t DriverID, void *Pointer, size_t Pages)
{
auto itr = Drivers.find(DriverID);
assert(itr != Drivers.end());
itr->second.vma->FreePages(Pointer, Pages);
}
int Manager::ReportInputEvent(dev_t DriverID, InputReport *Report)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Report->Device);
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Report->Device);
dOps->second.InputReports->Write(Report, 1);
switch (Report->Type)
{
case INPUT_TYPE_KEYBOARD:
{
KeyboardReport *kReport = &Report->Keyboard;
GlobalKeyboardInputReports.Write(kReport, 1);
break;
}
case INPUT_TYPE_MOUSE:
{
MouseReport *mReport = &Report->Mouse;
GlobalMouseInputReports.Write(mReport, 1);
break;
}
default:
assert(!"Invalid input type");
}
return 0;
}
void Manager::InitializeDaemonFS()
{
dev_t MinorID = 0;
DeviceInode *_dev = new DeviceInode;
_dev->Name = "dev";
/* d rwx r-- r-- */
mode_t mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFDIR;
Inode *dev = (Inode *)_dev;
dev->Mode = mode;
dev->Flags = I_FLAG_MOUNTPOINT | I_FLAG_CACHE_KEEP;
FileSystemInfo *fsi = new FileSystemInfo;
fsi->Name = "Device Virtual File System";
fsi->RootName = "dev";
fsi->Flags = I_FLAG_ROOT | I_FLAG_MOUNTPOINT | I_FLAG_CACHE_KEEP;
fsi->SuperOps = {};
fsi->Ops.Lookup = __fs_Lookup;
fsi->Ops.Create = __fs_Create;
fsi->Ops.Remove = nullptr;
fsi->Ops.Rename = nullptr;
fsi->Ops.Read = __fs_Read;
fsi->Ops.Write = __fs_Write;
fsi->Ops.Truncate = nullptr;
fsi->Ops.Open = __fs_Open;
fsi->Ops.Close = __fs_Close;
fsi->Ops.Ioctl = __fs_Ioctl;
fsi->Ops.ReadDir = __fs_Readdir;
fsi->Ops.MkDir = nullptr;
fsi->Ops.RmDir = nullptr;
fsi->Ops.SymLink = nullptr;
fsi->Ops.ReadLink = nullptr;
fsi->Ops.Seek = nullptr;
fsi->Ops.Stat = nullptr;
dev->Device = fs->RegisterFileSystem(fsi, dev);
dev->SetDevice(0, MinorID++);
MinorID++; /* 1 = /proc/self */
devNode = fs->Mount(fs->GetRoot(0), dev, "/dev");
_dev->Parent = devNode->Parent;
_dev->ParentInode = devNode->Parent->Node;
/* d rwx r-- r-- */
mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFDIR;
DeviceInode *input = new DeviceInode;
input->Parent = devNode;
input->ParentInode = devNode->Node;
input->Name = "input";
input->Node.Device = dev->Device;
input->Node.Mode = mode;
input->Node.Flags = I_FLAG_CACHE_KEEP;
input->Node.Offset = _dev->Children.size();
_dev->Children.push_back(input);
devInputNode = fs->GetByPath("input", devNode);
auto createDevice = [](DeviceInode *p1, FileNode *p2, const std::string &name, dev_t maj, dev_t min, mode_t mode)
{
DeviceInode *device = new DeviceInode;
device->Parent = p2;
device->ParentInode = p2->Node;
device->Name = name;
device->Node.Device = p2->Node->Device;
device->Node.Mode = mode;
device->Node.SetDevice(maj, min);
device->Node.Flags = I_FLAG_CACHE_KEEP;
device->Node.Offset = p1->Children.size();
p1->Children.push_back(device);
};
MinorID = 0;
/* c rw- r-- --- */
mode = S_IRUSR | S_IWUSR |
S_IRGRP |
S_IFCHR;
createDevice(input, devInputNode, "keyboard", 1, MinorID++, mode);
/* c rw- r-- --- */
mode = S_IRUSR | S_IWUSR |
S_IRGRP |
S_IFCHR;
createDevice(input, devInputNode, "mouse", 1, MinorID++, mode);
}
}

483
Kernel/core/driver/dev.cpp Normal file
View File

@ -0,0 +1,483 @@
/*
This file is part of Fennix Kernel.
Fennix Kernel is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
*/
#include <driver.hpp>
#include "../../kernel.h"
namespace Driver
{
dev_t DeviceDirID;
int __fs_Lookup(struct Inode *_Parent, const char *Name, struct Inode **Result)
{
func("%#lx %s %#lx", _Parent, Name, Result);
assert(_Parent != nullptr);
const char *basename;
size_t length;
cwk_path_get_basename(Name, &basename, &length);
if (basename == NULL)
{
error("Invalid name %s", Name);
return -EINVAL;
}
auto Parent = (Manager::DeviceInode *)_Parent;
for (const auto &child : Parent->Children)
{
debug("Comparing %s with %s", basename, child->Name.c_str());
if (strcmp(child->Name.c_str(), basename) != 0)
continue;
*Result = &child->inode;
return 0;
}
debug("Not found %s", Name);
return -ENOENT;
}
int __fs_Create(struct Inode *_Parent, const char *Name, mode_t Mode, struct Inode **Result)
{
func("%#lx %s %d", _Parent, Name, Mode);
assert(_Parent != nullptr);
/* We expect to be /dev or children of it */
auto Parent = (Manager::DeviceInode *)_Parent;
auto _dev = new Manager::DeviceInode;
_dev->Parent = nullptr;
_dev->ParentInode = _Parent;
_dev->Name = Name;
_dev->inode.Device = Parent->inode.Device;
_dev->inode.Mode = Mode;
_dev->inode.Index = Parent->inode.Index + Parent->Children.size();
_dev->inode.Offset = Parent->Children.size();
Parent->Children.push_back(_dev);
*Result = &_dev->inode;
return 0;
}
ssize_t __fs_Read(struct Inode *Node, void *Buffer, size_t Size, off_t Offset)
{
func("%#lx %d %d", Node, Size, Offset);
if ((dev_t)Node->GetMajor() == DeviceDirID)
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
{
if (Size < sizeof(KeyboardReport))
return -EINVAL;
size_t nReads = Size / sizeof(KeyboardReport);
KeyboardReport *report = (KeyboardReport *)Buffer;
while (DriverManager->GlobalKeyboardInputReports.Count() == 0)
TaskManager->Yield();
DriverManager->GlobalKeyboardInputReports.Read(report, nReads);
return sizeof(KeyboardReport) * nReads;
}
case 1: /* /dev/input/mouse */
{
if (Size < sizeof(MouseReport))
return -EINVAL;
size_t nReads = Size / sizeof(MouseReport);
MouseReport *report = (MouseReport *)Buffer;
while (DriverManager->GlobalMouseInputReports.Count() == 0)
TaskManager->Yield();
DriverManager->GlobalMouseInputReports.Read(report, nReads);
return sizeof(MouseReport) * nReads;
}
default:
return -ENOENT;
};
}
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Read, -ENOTSUP);
return dOps->second.Ops->Read(Node, Buffer, Size, Offset);
}
ssize_t __fs_Write(struct Inode *Node, const void *Buffer, size_t Size, off_t Offset)
{
func("%#lx %p %d %d", Node, Buffer, Size, Offset);
if ((dev_t)Node->GetMajor() == DeviceDirID)
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
{
return -ENOTSUP;
}
case 1: /* /dev/input/mouse */
{
return -ENOTSUP;
}
default:
return -ENOENT;
};
}
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Write, -ENOTSUP);
return dOps->second.Ops->Write(Node, Buffer, Size, Offset);
}
int __fs_Open(struct Inode *Node, int Flags, mode_t Mode)
{
func("%#lx %d %d", Node, Flags, Mode);
if ((dev_t)Node->GetMajor() == DeviceDirID)
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
case 1: /* /dev/input/mouse */
return -ENOTSUP;
default:
return -ENOENT;
};
}
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Open, -ENOTSUP);
return dOps->second.Ops->Open(Node, Flags, Mode);
}
int __fs_Close(struct Inode *Node)
{
func("%#lx", Node);
if ((dev_t)Node->GetMajor() == DeviceDirID)
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
case 1: /* /dev/input/mouse */
return -ENOTSUP;
default:
return -ENOENT;
};
}
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Close, -ENOTSUP);
return dOps->second.Ops->Close(Node);
}
int __fs_Ioctl(struct Inode *Node, unsigned long Request, void *Argp)
{
func("%#lx %lu %#lx", Node, Request, Argp);
if ((dev_t)Node->GetMajor() == DeviceDirID)
{
switch (Node->GetMinor())
{
case 0: /* /dev/input/keyboard */
case 1: /* /dev/input/mouse */
return -ENOSYS;
default:
return -ENOENT;
};
}
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(Node->GetMajor());
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", Node->GetMajor());
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Node->GetMinor());
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Node->GetMinor());
AssertReturnError(dOps->second.Ops, -ENOTSUP);
AssertReturnError(dOps->second.Ops->Ioctl, -ENOTSUP);
return dOps->second.Ops->Ioctl(Node, Request, Argp);
}
__no_sanitize("alignment") ssize_t __fs_Readdir(struct Inode *_Node, struct kdirent *Buffer, size_t Size, off_t Offset, off_t Entries)
{
func("%#lx %#lx %d %d %d", _Node, Buffer, Size, Offset, Entries);
auto node = (Manager::DeviceInode *)_Node;
off_t realOffset = Offset;
size_t totalSize = 0;
uint16_t reclen = 0;
struct kdirent *ent = nullptr;
if (!S_ISDIR(node->inode.Mode))
return -ENOTDIR;
if (Offset == 0)
{
reclen = (uint16_t)(offsetof(struct kdirent, d_name) + strlen(".") + 1);
if (totalSize + reclen > Size)
return -EINVAL;
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
ent->d_ino = node->inode.Index;
ent->d_off = 0;
ent->d_reclen = reclen;
ent->d_type = DT_DIR;
strcpy(ent->d_name, ".");
totalSize += reclen;
Offset++;
}
if (Offset == 1)
{
reclen = (uint16_t)(offsetof(struct kdirent, d_name) + strlen("..") + 1);
if (totalSize + reclen > Size)
return totalSize;
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
if (node->Parent)
ent->d_ino = node->Parent->inode->Index;
else if (node->ParentInode)
ent->d_ino = node->ParentInode->Index;
else
ent->d_ino = node->inode.Index;
ent->d_off = 1;
ent->d_reclen = reclen;
ent->d_type = DT_DIR;
strcpy(ent->d_name, "..");
totalSize += reclen;
Offset++;
}
off_t entryIndex = 0;
for (const auto &var : node->Children)
{
if (entryIndex + 2 < realOffset)
{
entryIndex++;
continue;
}
if (Entries && entryIndex >= Entries)
break;
reclen = (uint16_t)(offsetof(struct kdirent, d_name) + strlen(var->Name.c_str()) + 1);
if (totalSize + reclen > Size)
break;
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
ent->d_ino = var->inode.Index;
ent->d_off = entryIndex + 2;
ent->d_reclen = reclen;
ent->d_type = IFTODT(var->inode.Mode);
strcpy(ent->d_name, var->Name.c_str());
totalSize += reclen;
entryIndex++;
}
if (totalSize + offsetof(struct kdirent, d_name) + 1 > Size)
return totalSize;
ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
ent->d_ino = 0;
ent->d_off = 0;
ent->d_reclen = 0;
ent->d_type = DT_UNKNOWN;
ent->d_name[0] = '\0';
return totalSize;
}
int __fs_Stat(struct Inode *_Node, struct kstat *Stat)
{
func("%#lx %#lx", _Node, Stat);
auto node = (Manager::DeviceInode *)_Node;
assert(node != nullptr);
assert(Stat != nullptr);
Stat->Device = node->inode.Device;
Stat->Index = node->inode.Index;
Stat->HardLinks = 1;
Stat->UserID = 0;
Stat->GroupID = 0;
Stat->RawDevice = node->inode.RawDevice;
Stat->Size = node->Size;
Stat->AccessTime = node->AccessTime;
Stat->ModifyTime = node->ModifyTime;
Stat->ChangeTime = node->ChangeTime;
Stat->BlockSize = node->BlockSize;
Stat->Blocks = node->Blocks;
Stat->Attribute = 0;
return 0;
}
void Manager::InitializeDeviceDirectory()
{
dev_t MinorID = 0;
DeviceInode *_dev = new DeviceInode;
_dev->Name = "dev";
/* d rwx r-- r-- */
mode_t mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFDIR;
Inode *dev = (Inode *)_dev;
dev->Mode = mode;
FileSystemInfo *fsi = new FileSystemInfo;
fsi->Name = "Device Virtual File System";
fsi->SuperOps = {};
fsi->Ops.Lookup = __fs_Lookup;
fsi->Ops.Create = __fs_Create;
fsi->Ops.Remove = nullptr;
fsi->Ops.Rename = nullptr;
fsi->Ops.Read = __fs_Read;
fsi->Ops.Write = __fs_Write;
fsi->Ops.Truncate = nullptr;
fsi->Ops.Open = __fs_Open;
fsi->Ops.Close = __fs_Close;
fsi->Ops.Ioctl = __fs_Ioctl;
fsi->Ops.ReadDir = __fs_Readdir;
fsi->Ops.MkDir = nullptr;
fsi->Ops.RmDir = nullptr;
fsi->Ops.SymLink = nullptr;
fsi->Ops.ReadLink = nullptr;
fsi->Ops.Seek = nullptr;
fsi->Ops.Stat = __fs_Stat;
DeviceDirID = dev->Device = fs->RegisterFileSystem(fsi);
dev->SetDevice(0, MinorID++);
Node root = fs->GetRoot(0);
devNode = fs->Mount(root, dev, "dev", fsi);
assert(devNode->Parent != nullptr);
_dev->Parent = devNode->Parent;
_dev->ParentInode = devNode->Parent->inode;
/* d rwx r-- r-- */
mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFDIR;
DeviceInode *blk = new DeviceInode;
blk->Parent = devNode;
blk->ParentInode = devNode->inode;
blk->Name = "block";
blk->inode.Device = dev->Device;
blk->inode.Mode = mode;
blk->inode.Offset = _dev->Children.size();
_dev->Children.push_back(blk);
devBlockNode = fs->Lookup(devNode, "block");
/* d rwx r-- r-- */
mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFDIR;
DeviceInode *input = new DeviceInode;
input->Parent = devNode;
input->ParentInode = devNode->inode;
input->Name = "input";
input->inode.Device = dev->Device;
input->inode.Mode = mode;
input->inode.Offset = _dev->Children.size();
_dev->Children.push_back(input);
devInputNode = fs->Lookup(devNode, "input");
auto createDevice = [](DeviceInode *p1, Node p2, const std::string &name, dev_t maj, dev_t min, mode_t mode)
{
DeviceInode *device = new DeviceInode;
device->Parent = p2;
device->ParentInode = p2->inode;
device->Name = name;
device->inode.Device = p2->inode->Device;
device->inode.Mode = mode;
device->inode.SetDevice(maj, min);
device->inode.Offset = p1->Children.size();
p1->Children.push_back(device);
};
MinorID = 0;
/* c rw- r-- --- */
mode = S_IRUSR | S_IWUSR |
S_IRGRP |
S_IFCHR;
createDevice(input, devInputNode, "keyboard", DeviceDirID, MinorID++, mode);
/* c rw- r-- --- */
mode = S_IRUSR | S_IWUSR |
S_IRGRP |
S_IFCHR;
createDevice(input, devInputNode, "mouse", DeviceDirID, MinorID++, mode);
}
}

40
Kernel/core/driver/driver.cpp
View File

@ -38,12 +38,12 @@ extern const __SIZE_TYPE__ trusted_drivers_count;
namespace Driver
{
bool Manager::IsDriverTrusted(FileNode *File)
bool Manager::IsDriverTrusted(Node File)
{
kstat st;
File->Stat(&st);
fs->Stat(File, &st);
std::unique_ptr<uint8_t[]> ptr(new uint8_t[st.Size]);
File->Read(ptr.get(), st.Size, 0);
fs->Read(File, ptr.get(), st.Size, 0);
uint8_t *sha = sha512_sum(ptr.get(), st.Size);
char hash_str[129];
for (int j = 0; j < 64; j++)
@ -102,7 +102,8 @@ namespace Driver
}
const char *DriverDirectory = Config.DriverDirectory;
FileNode *drvDirNode = fs->GetByPath(DriverDirectory, nullptr);
Node root = fs->GetRoot(0);
Node drvDirNode = fs->Lookup(root, DriverDirectory);
if (!drvDirNode)
{
error("Failed to open driver directory %s", DriverDirectory);
@ -110,7 +111,7 @@ namespace Driver
return;
}
for (const auto &drvNode : drvDirNode->Children)
for (const auto &drvNode : fs->ReadDirectory(drvDirNode))
{
debug("Checking driver %s", drvNode->Path.c_str());
if (!drvNode->IsRegularFile())
@ -273,12 +274,12 @@ namespace Driver
}
}
int Manager::LoadDriverFile(DriverObject &Drv, FileNode *File)
int Manager::LoadDriverFile(DriverObject &Drv, Node File)
{
trace("Loading driver %s in memory", File->Name.c_str());
Elf_Ehdr ELFHeader{};
File->Read(&ELFHeader, sizeof(Elf_Ehdr), 0);
fs->Read(File, &ELFHeader, sizeof(Elf_Ehdr), 0);
AssertReturnError(ELFHeader.e_ident[EI_CLASS] == ELFCLASS64, -ENOEXEC);
AssertReturnError(ELFHeader.e_ident[EI_DATA] == ELFDATA2LSB, -ENOEXEC);
@ -295,7 +296,7 @@ namespace Driver
Elf_Phdr phdr{};
for (Elf_Half i = 0; i < ELFHeader.e_phnum; i++)
{
File->Read(&phdr, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
fs->Read(File, &phdr, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
if (phdr.p_type == PT_LOAD || phdr.p_type == PT_DYNAMIC)
{
if (segSize < phdr.p_vaddr + phdr.p_memsz)
@ -306,7 +307,7 @@ namespace Driver
if (phdr.p_type == PT_INTERP)
{
char interp[17];
File->Read(interp, sizeof(interp), phdr.p_offset);
fs->Read(File, interp, sizeof(interp), phdr.p_offset);
if (strncmp(interp, "/boot/fennix.elf", sizeof(interp)) != 0)
{
error("Interpreter is not /boot/fennix.elf");
@ -326,13 +327,13 @@ namespace Driver
Elf_Shdr shstrtab{};
Elf_Shdr shdr{};
__DriverInfo driverInfo{};
File->Read(&shstrtab, sizeof(Elf_Shdr), ELFHeader.e_shoff + (ELFHeader.e_shstrndx * ELFHeader.e_shentsize));
fs->Read(File, &shstrtab, sizeof(Elf_Shdr), ELFHeader.e_shoff + (ELFHeader.e_shstrndx * ELFHeader.e_shentsize));
for (Elf_Half i = 0; i < ELFHeader.e_shnum; i++)
{
if (i == ELFHeader.e_shstrndx)
continue;
File->Read(&shdr, ELFHeader.e_shentsize, ELFHeader.e_shoff + (i * ELFHeader.e_shentsize));
fs->Read(File, &shdr, ELFHeader.e_shentsize, ELFHeader.e_shoff + (i * ELFHeader.e_shentsize));
switch (shdr.sh_type)
{
@ -350,11 +351,11 @@ namespace Driver
}
char symName[16];
File->Read(symName, sizeof(symName), shstrtab.sh_offset + shdr.sh_name);
fs->Read(File, symName, sizeof(symName), shstrtab.sh_offset + shdr.sh_name);
if (strcmp(symName, ".driver.info") != 0)
continue;
File->Read(&driverInfo, sizeof(__DriverInfo), shdr.sh_offset);
fs->Read(File, &driverInfo, sizeof(__DriverInfo), shdr.sh_offset);
/* Perform relocations */
driverInfo.Name = (const char *)(Drv.BaseAddress + (uintptr_t)driverInfo.Name);
@ -367,13 +368,13 @@ namespace Driver
{
Elf_Sym symEntry{};
uintptr_t symOffset = sht_symtab.sh_offset + (h * sizeof(Elf_Sym));
File->Read(&symEntry, sizeof(Elf_Sym), symOffset);
fs->Read(File, &symEntry, sizeof(Elf_Sym), symOffset);
if (symEntry.st_name == 0)
continue;
char symName[16];
File->Read(symName, sizeof(symName), sht_strtab.sh_offset + symEntry.st_name);
fs->Read(File, symName, sizeof(symName), sht_strtab.sh_offset + symEntry.st_name);
switch (symEntry.st_shndx)
{
@ -405,7 +406,7 @@ namespace Driver
for (Elf_Half i = 0; i < ELFHeader.e_phnum; i++)
{
File->Read(&phdr, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
fs->Read(File, &phdr, sizeof(Elf_Phdr), ELFHeader.e_phoff + (i * sizeof(Elf_Phdr)));
switch (phdr.p_type)
{
@ -421,7 +422,7 @@ namespace Driver
phdr.p_filesz, phdr.p_memsz);
if (phdr.p_filesz > 0)
File->Read(dest, phdr.p_filesz, phdr.p_offset);
fs->Read(File, (void *)dest, phdr.p_filesz, phdr.p_offset);
if (phdr.p_memsz - phdr.p_filesz > 0)
{
@ -620,7 +621,8 @@ namespace Driver
delete Drv.DeviceOperations;
/* Reload the driver */
FileNode *drvNode = fs->GetByPath(Drv.Path.c_str(), nullptr);
Node root = fs->GetRoot(0);
Node drvNode = fs->Lookup(root, Drv.Path);
if (!drvNode)
{
error("Failed to open driver file %s", Drv.Path.c_str());
@ -684,7 +686,7 @@ namespace Driver
newDrvObj.Initialized = true;
}
Manager::Manager() { this->InitializeDaemonFS(); }
Manager::Manager() { this->InitializeDeviceDirectory(); }
Manager::~Manager()
{

256
Kernel/core/driver/manager.cpp Normal file
View File

@ -0,0 +1,256 @@
/*
This file is part of Fennix Kernel.
Fennix Kernel is free software: you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, either version 3 of
the License, or (at your option) any later version.
Fennix Kernel is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with Fennix Kernel. If not, see <https://www.gnu.org/licenses/>.
*/
#include <driver.hpp>
#include <interface/driver.h>
#include <interface/input.h>
#include <memory.hpp>
#include <stropts.h>
#include <ints.hpp>
#include <task.hpp>
#include <printf.h>
#include <exec.hpp>
#include <rand.hpp>
#include <cwalk.h>
#include <md5.h>
#include "../../kernel.h"
using namespace vfs;
namespace Driver
{
dev_t Manager::RegisterDevice(dev_t DriverID, DeviceType Type, const InodeOperations *Operations)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
for (size_t i = 0; i < 128; i++)
{
const auto dOps = dop->find(i);
const auto dOpsEnd = dop->end();
if (dOps != dOpsEnd)
continue;
DeviceType devType = (DeviceType)(Type & DEVICE_TYPE_MASK);
switch (devType)
{
case DEVICE_TYPE_INPUT:
{
std::string prefix = "event";
for (size_t j = 0; j < 128; j++)
{
std::string deviceName = prefix + std::to_string(j);
Node node = fs->Lookup(devInputNode, deviceName);
if (node)
continue;
/* c rwx r-- r-- */
mode_t mode = S_IRWXU |
S_IRGRP |
S_IROTH |
S_IFCHR;
node = fs->Create(devInputNode, deviceName, mode);
node->inode->SetDevice(DriverID, i);
DriverHandlers dh{};
dh.Ops = Operations;
dh.Node = node->inode;
dh.InputReports = new RingBuffer<InputReport>(16);
dop->insert({i, std::move(dh)});
return i;
}
ReturnLogError(-EOVERFLOW, "No available slots for device %d", DriverID);
}
default:
ReturnLogError(-EINVAL, "Invalid device type %d", Type);
}
}
ReturnLogError(-EOVERFLOW, "No available slots for device %d", DriverID);
}
dev_t Manager::CreateDeviceFile(dev_t DriverID, const char *name, mode_t mode, const InodeOperations *Operations)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
for (size_t i = 0; i < 128; i++)
{
const auto dOps = dop->find(i);
if (dOps != dop->end())
continue;
eNode node = fs->Lookup(devNode, name);
if (node == true)
ReturnLogError(-EEXIST, "Device file %s already exists", name);
node = fs->Create(devNode, name, mode);
if (node == false)
ReturnLogError(-node.Error, "Failed to create device file %s; %s", name, node.what());
node.Value->inode->SetDevice(DriverID, i);
DriverHandlers dh{};
dh.Ops = Operations;
dh.Node = node.Value->inode;
dh.InputReports = new RingBuffer<InputReport>(16);
dop->insert({i, std::move(dh)});
return i;
}
ReturnLogError(-EOVERFLOW, "No available slots for device %d", DriverID);
}
int Manager::UnregisterDevice(dev_t DriverID, dev_t Device)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
const auto dOps = dop->find(Device);
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Device);
dop->erase(dOps);
fixme("remove eventX from /dev/input");
fixme("delete InputReports");
return 0;
}
dev_t Manager::RegisterBlockDevice(dev_t DriverID, struct BlockDevice *Device)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
std::string prefix = Device->Name;
for (size_t j = 0; j < 128; j++)
{
std::string deviceName = prefix + std::to_string(j);
Node node = fs->Lookup(devBlockNode, deviceName);
if (node)
continue;
debug("Creating \"%s\"", deviceName.c_str());
/* b rwx --- --- */
mode_t mode = S_IRWXU |
S_IFBLK;
node = fs->Create(devBlockNode, deviceName, mode);
node->inode->SetDevice(DriverID, j);
auto devNode = (Manager::DeviceInode *)node->inode;
devNode->Size = Device->Size;
devNode->BlockSize = Device->BlockSize;
devNode->Blocks = Device->BlockCount;
devNode->inode.PrivateData = Device->PrivateData;
DriverHandlers dh{};
dh.Ops = Device->Ops;
dh.Node = node->inode;
dop->insert({j, std::move(dh)});
debug("dh ops:%#lx node:%#lx %d", dh.Ops, dh.Node, j);
return j;
}
ReturnLogError(-EOVERFLOW, "No available slots for device %d", DriverID);
}
int Manager::UnregisterBlockDevice(dev_t DriverID, dev_t DeviceID)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers = DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
const auto dOps = dop->find(DeviceID);
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", DeviceID);
dop->erase(dOps);
return 0;
}
void *Manager::AllocateMemory(dev_t DriverID, size_t Pages)
{
auto itr = Drivers.find(DriverID);
assert(itr != Drivers.end());
void *ptr = itr->second.vma->RequestPages(Pages);
memset(ptr, 0, FROM_PAGES(Pages));
return ptr;
}
void Manager::FreeMemory(dev_t DriverID, void *Pointer, size_t Pages)
{
auto itr = Drivers.find(DriverID);
assert(itr != Drivers.end());
itr->second.vma->FreePages(Pointer, Pages);
}
int Manager::ReportInputEvent(dev_t DriverID, InputReport *Report)
{
std::unordered_map<dev_t, Driver::DriverObject> &drivers =
DriverManager->GetDrivers();
const auto it = drivers.find(DriverID);
if (it == drivers.end())
ReturnLogError(-EINVAL, "Driver %d not found", DriverID);
const Driver::DriverObject *drv = &it->second;
auto dop = drv->DeviceOperations;
auto dOps = dop->find(Report->Device);
if (dOps == dop->end())
ReturnLogError(-EINVAL, "Device %d not found", Report->Device);
dOps->second.InputReports->Write(Report, 1);
switch (Report->Type)
{
case INPUT_TYPE_KEYBOARD:
{
KeyboardReport *kReport = &Report->Keyboard;
GlobalKeyboardInputReports.Write(kReport, 1);
break;
}
case INPUT_TYPE_MOUSE:
{
MouseReport *mReport = &Report->Mouse;
GlobalMouseInputReports.Write(mReport, 1);
break;
}
default:
assert(!"Invalid input type");
}
return 0;
}
}