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Kernel/LibC: Implement {,f}statvfs

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Bananymous
2024-12-02 06:55:35 +02:00
parent ad1f175a39
commit a10ca47657
21 changed files with 173 additions and 5 deletions
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12
kernel/include/kernel/FS/Ext2/FileSystem.h
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@@ -11,6 +11,18 @@ namespace Kernel
class Ext2FS final : public FileSystem
{
public:
virtual unsigned long bsize() const override;
virtual unsigned long frsize() const override;
virtual fsblkcnt_t blocks() const override;
virtual fsblkcnt_t bfree() const override;
virtual fsblkcnt_t bavail() const override;
virtual fsfilcnt_t files() const override;
virtual fsfilcnt_t ffree() const override;
virtual fsfilcnt_t favail() const override;
virtual unsigned long fsid() const override;
virtual unsigned long flag() const override;
virtual unsigned long namemax() const override;
class BlockBufferWrapper
{
BAN_NON_COPYABLE(BlockBufferWrapper);

2
kernel/include/kernel/FS/Ext2/Inode.h
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@@ -29,6 +29,8 @@ namespace Kernel
virtual dev_t dev() const override { return 0; }
virtual dev_t rdev() const override { return 0; }
virtual const FileSystem* filesystem() const override;
protected:
virtual BAN::ErrorOr<BAN::RefPtr<Inode>> find_inode_impl(BAN::StringView) override;
virtual BAN::ErrorOr<size_t> list_next_inodes_impl(off_t, struct dirent*, size_t) override;

20
kernel/include/kernel/FS/FAT/FileSystem.h
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@@ -20,6 +20,18 @@ namespace Kernel
};
public:
virtual unsigned long bsize() const override;
virtual unsigned long frsize() const override;
virtual fsblkcnt_t blocks() const override;
virtual fsblkcnt_t bfree() const override;
virtual fsblkcnt_t bavail() const override;
virtual fsfilcnt_t files() const override;
virtual fsfilcnt_t ffree() const override;
virtual fsfilcnt_t favail() const override;
virtual unsigned long fsid() const override;
virtual unsigned long flag() const override;
virtual unsigned long namemax() const override;
static BAN::ErrorOr<bool> probe(BAN::RefPtr<BlockDevice>);
static BAN::ErrorOr<BAN::RefPtr<FATFS>> create(BAN::RefPtr<BlockDevice>);
@@ -45,13 +57,15 @@ namespace Kernel
// TODO: These probably should be constant variables
uint32_t root_sector_count() const { return BAN::Math::div_round_up<uint32_t>(m_bpb.root_entry_count * 32, m_bpb.bytes_per_sector); }
uint32_t fat_sector_count() const { return m_bpb.fat_size16 ? m_bpb.fat_size16 : m_bpb.ext_32.fat_size32; }
uint32_t fat_size() const { return m_bpb.fat_size16 ? m_bpb.fat_size16 : m_bpb.ext_32.fat_size32; }
uint32_t total_sector_count() const { return m_bpb.total_sectors16 ? m_bpb.total_sectors16 : m_bpb.total_sectors32; }
uint32_t data_sector_count() const { return total_sector_count() - (m_bpb.reserved_sector_count + (m_bpb.number_of_fats * fat_sector_count()) + root_sector_count()); }
uint32_t data_sector_count() const { return total_sector_count() - (m_bpb.reserved_sector_count + (m_bpb.number_of_fats * fat_size()) + root_sector_count()); }
uint32_t cluster_count() const { return data_sector_count() / m_bpb.sectors_per_cluster; }
uint32_t first_data_sector() const { return m_bpb.reserved_sector_count + (m_bpb.number_of_fats * fat_sector_count()) + root_sector_count(); }
uint32_t first_data_sector() const { return m_bpb.reserved_sector_count + (m_bpb.number_of_fats * fat_size()) + root_sector_count(); }
uint32_t first_fat_sector() const { return m_bpb.reserved_sector_count; }
uint8_t bits_per_fat_entry() const { return static_cast<uint8_t>(m_type); }
private:
BAN::RefPtr<BlockDevice> m_block_device;
BAN::RefPtr<FATInode> m_root_inode;

2
kernel/include/kernel/FS/FAT/Inode.h
View File

@@ -29,6 +29,8 @@ namespace Kernel
virtual dev_t dev() const override { return 0; }
virtual dev_t rdev() const override { return 0; }
virtual const FileSystem* filesystem() const override;
const FAT::DirectoryEntry& entry() const { return m_entry; }
protected:

12
kernel/include/kernel/FS/FileSystem.h
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@@ -9,6 +9,18 @@ namespace Kernel
class FileSystem : public BAN::RefCounted<FileSystem>
{
public:
virtual unsigned long bsize() const = 0;
virtual unsigned long frsize() const = 0;
virtual fsblkcnt_t blocks() const = 0;
virtual fsblkcnt_t bfree() const = 0;
virtual fsblkcnt_t bavail() const = 0;
virtual fsfilcnt_t files() const = 0;
virtual fsfilcnt_t ffree() const = 0;
virtual fsfilcnt_t favail() const = 0;
virtual unsigned long fsid() const = 0;
virtual unsigned long flag() const = 0;
virtual unsigned long namemax() const = 0;
virtual ~FileSystem() {}
static BAN::ErrorOr<BAN::RefPtr<FileSystem>> from_block_device(BAN::RefPtr<BlockDevice>);

4
kernel/include/kernel/FS/Inode.h
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@@ -19,6 +19,8 @@
namespace Kernel
{
class FileSystem;
class FileBackedRegion;
class SharedFileData;
@@ -86,6 +88,8 @@ namespace Kernel
virtual bool is_pipe() const { return false; }
virtual bool is_tty() const { return false; }
virtual const FileSystem* filesystem() const = 0;
// Directory API
BAN::ErrorOr<BAN::RefPtr<Inode>> find_inode(BAN::StringView);
BAN::ErrorOr<size_t> list_next_inodes(off_t, struct dirent* list, size_t list_size);

2
kernel/include/kernel/FS/Pipe.h
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@@ -30,6 +30,8 @@ namespace Kernel
virtual dev_t dev() const override { return 0; } // FIXME
virtual dev_t rdev() const override { return 0; } // FIXME
virtual const FileSystem* filesystem() const override { return nullptr; }
protected:
virtual BAN::ErrorOr<size_t> read_impl(off_t, BAN::ByteSpan) override;
virtual BAN::ErrorOr<size_t> write_impl(off_t, BAN::ConstByteSpan) override;

2
kernel/include/kernel/FS/Socket.h
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@@ -44,6 +44,8 @@ namespace Kernel
dev_t dev() const final override { ASSERT_NOT_REACHED(); }
dev_t rdev() const final override { ASSERT_NOT_REACHED(); }
const FileSystem* filesystem() const final override { return nullptr; }
protected:
Socket(const Info& info)
: m_info(info)

13
kernel/include/kernel/FS/TmpFS/FileSystem.h
View File

@@ -40,6 +40,19 @@ namespace Kernel
static constexpr size_t no_page_limit = SIZE_MAX;
public:
// FIXME: basically all of these :)
virtual unsigned long bsize() const override { return PAGE_SIZE; }
virtual unsigned long frsize() const override { return PAGE_SIZE; }
virtual fsblkcnt_t blocks() const override { return m_max_pages; }
virtual fsblkcnt_t bfree() const override { return m_max_pages - m_used_pages; }
virtual fsblkcnt_t bavail() const override { return m_max_pages - m_used_pages; }
virtual fsfilcnt_t files() const override { return PAGE_SIZE * blocks() / sizeof(TmpDirectoryEntry); }
virtual fsfilcnt_t ffree() const override { return PAGE_SIZE * bfree() / sizeof(TmpDirectoryEntry); }
virtual fsfilcnt_t favail() const override { return PAGE_SIZE * bavail() / sizeof(TmpDirectoryEntry); }
virtual unsigned long fsid() const override { return reinterpret_cast<uintptr_t>(this); }
virtual unsigned long flag() const override { return 0; }
virtual unsigned long namemax() const override { return PAGE_SIZE; }
static BAN::ErrorOr<TmpFileSystem*> create(size_t max_pages, mode_t, uid_t, gid_t);
~TmpFileSystem();

2
kernel/include/kernel/FS/TmpFS/Inode.h
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@@ -42,6 +42,8 @@ namespace Kernel
static BAN::ErrorOr<BAN::RefPtr<TmpInode>> create_from_existing(TmpFileSystem&, ino_t, const TmpInodeInfo&);
~TmpInode();
virtual const FileSystem* filesystem() const override;
protected:
TmpInode(TmpFileSystem&, ino_t, const TmpInodeInfo&);

15
kernel/include/kernel/FS/VirtualFileSystem.h
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@@ -8,9 +8,22 @@
namespace Kernel
{
class VirtualFileSystem : public FileSystem
class VirtualFileSystem final : public FileSystem
{
public:
virtual unsigned long bsize() const override { return 0; }
virtual unsigned long frsize() const override { return 0; }
virtual fsblkcnt_t blocks() const override { return 0; }
virtual fsblkcnt_t bfree() const override { return 0; }
virtual fsblkcnt_t bavail() const override { return 0; }
virtual fsfilcnt_t files() const override { return 0; }
virtual fsfilcnt_t ffree() const override { return 0; }
virtual fsfilcnt_t favail() const override { return 0; }
virtual unsigned long fsid() const override { return 0; }
virtual unsigned long flag() const override { return 0; }
virtual unsigned long namemax() const override { return 0; }
static void initialize(BAN::StringView);
static VirtualFileSystem& get();

2
kernel/include/kernel/Process.h
View File

@@ -19,6 +19,7 @@
#include <sys/mman.h>
#include <sys/select.h>
#include <sys/socket.h>
#include <sys/statvfs.h>
#include <sys/time.h>
#include <termios.h>
@@ -147,6 +148,7 @@ namespace Kernel
BAN::ErrorOr<long> sys_fsync(int fd);
BAN::ErrorOr<long> sys_fstatat(int fd, const char* path, struct stat* buf, int flag);
BAN::ErrorOr<long> sys_fstatvfsat(int fd, const char* path, struct statvfs* buf);
BAN::ErrorOr<long> sys_realpath(const char* path, char* buffer);