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Kernel/storage/fs/ustar.cpp
EnderIce2 f624339dff
fs: Fix ustar ReadDir() wrong d_type
2024-10-16 01:50:49 +03:00

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/*
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 <filesystem/ustar.hpp>
#include <memory.hpp>
#include <functional>
#include <debug.h>
#include "../../kernel.h"
#define TMAGIC "ustar"
#define TMAGLEN 6
#define TVERSION "00"
#define TVERSLEN 2
namespace vfs
{
int USTAR::Lookup(struct Inode *_Parent, const char *Name, struct Inode **Result)
{
auto Parent = (USTARInode *)_Parent;
const char *basename;
size_t length;
cwk_path_get_basename(Name, &basename, &length);
if (basename == NULL)
{
if (strcmp(Name, "/") == 0)
{
auto &it = Files.at(0);
*Result = &it->Node;
return 0;
}
error("Invalid name %s", Name);
return -EINVAL;
}
if (_Parent)
{
for (const auto &child : Parent->Children)
{
if (child->Deleted || strcmp(child->Name.c_str(), basename) != 0)
continue;
*Result = &child->Node;
return 0;
}
return -ENOENT;
}
auto fileItr = Files.begin();
while (fileItr != Files.end())
{
USTARInode *node = fileItr->second;
if (node->Deleted || strcmp(node->Name.c_str(), basename) != 0)
{
fileItr++;
continue;
}
*Result = &fileItr->second->Node;
return 0;
}
return -ENOENT;
}
int USTAR::Create(struct Inode *_Parent, const char *Name, mode_t Mode, struct Inode **Result)
{
USTARInode *Parent = (USTARInode *)_Parent;
Inode inode{};
inode.Mode = Mode;
inode.Device = this->DeviceID;
inode.RawDevice = 0;
inode.Index = NextInode;
inode.Offset = 0;
inode.PrivateData = this;
inode.Flags = I_FLAG_CACHE_KEEP;
const char *basename;
size_t length;
cwk_path_get_basename(Name, &basename, &length);
auto SetMode = [&](mode_t &Mode, FileHeader *header)
{
if (Mode & S_IFREG)
header->typeflag[0] = REGTYPE;
else if (Mode & S_IFLNK)
header->typeflag[0] = SYMTYPE;
else if (Mode & S_IFCHR)
header->typeflag[0] = CHRTYPE;
else if (Mode & S_IFBLK)
header->typeflag[0] = BLKTYPE;
else if (Mode & S_IFDIR)
header->typeflag[0] = DIRTYPE;
else if (Mode & S_IFIFO)
header->typeflag[0] = FIFOTYPE;
mode_t final = 0;
if (Mode & S_ISUID)
final |= TSUID;
else if (Mode & S_ISGID)
final |= TSGID;
else if (Mode & S_ISVTX)
final |= TSVTX;
else if (Mode & S_IRUSR)
final |= TUREAD;
else if (Mode & S_IWUSR)
final |= TUWRITE;
else if (Mode & S_IXUSR)
final |= TUEXEC;
else if (Mode & S_IRGRP)
final |= TGREAD;
else if (Mode & S_IWGRP)
final |= TGWRITE;
else if (Mode & S_IXGRP)
final |= TGEXEC;
else if (Mode & S_IROTH)
final |= TOREAD;
else if (Mode & S_IWOTH)
final |= TOWRITE;
else if (Mode & S_IXOTH)
final |= TOEXEC;
snprintf(header->mode, sizeof(header->mode), "%07o", final);
};
FileHeader *hdr = new FileHeader{};
SetMode(inode.Mode, hdr);
strncpy(hdr->name, basename, sizeof(hdr->name));
strncpy(hdr->signature, TMAGIC, TMAGLEN);
strncpy(hdr->version, TVERSION, TVERSLEN);
USTARInode *node = new USTARInode{.Node = inode,
.Header = hdr,
.Parent = Parent,
.Name{},
.Path{},
.Children{},
.Deleted = false,
.Checksum = INODE_CHECKSUM};
node->Name.assign(basename, length);
node->Path.assign(Name, strlen(Name));
Files.insert(std::make_pair(NextInode, node));
*Result = &Files.at(NextInode)->Node;
if (Parent)
Parent->Children.push_back(Files.at(NextInode));
NextInode++;
return 0;
}
ssize_t USTAR::Read(struct Inode *Node, void *Buffer, size_t Size, off_t Offset)
{
auto fileItr = Files.find(Node->Index);
assert(fileItr != Files.end());
if (fileItr->second->Deleted)
return -ENOENT;
USTARInode *node = fileItr->second;
size_t fileSize = GetSize(node->Header->size);
if (Size <= 0)
{
debug("Size is less than or equal to 0");
Size = fileSize;
}
if ((size_t)Offset > fileSize)
{
debug("Offset %d is greater than file size %d", Offset, fileSize);
return 0;
}
if ((fileSize - Offset) == 0)
{
debug("Offset %d is equal to file size %d", Offset, fileSize);
return 0; /* EOF */
}
if ((size_t)Offset + Size > fileSize)
{
debug("Offset %d + Size %d is greater than file size %d",
Offset, Size, fileSize);
Size = fileSize;
}
memcpy(Buffer, (uint8_t *)((uintptr_t)node->Header + sizeof(FileHeader) + Offset), Size);
// debug("Read %d bytes from %d[%d]", Size, Node->Index, Offset);
return Size;
}
__no_sanitize("alignment")
ssize_t USTAR::ReadDir(struct Inode *_Node, struct kdirent *Buffer, size_t Size, off_t Offset, off_t Entries)
{
/* FIXME: FIX ALIGNMENT FOR DIRENT! */
auto Node = (USTARInode *)_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
{
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;
}
// off_t entriesSkipped = 0;
// auto fileItr = Files.begin();
// while (fileItr != Files.end())
// {
// if (fileItr->second->Deleted)
// continue;
// reclen = (uint16_t)(offsetof(struct kdirent, d_name) + strlen(fileItr->second->Name.c_str()) + 1);
// if (Offset > entriesSkipped)
// {
// entriesSkipped++;
// continue;
// }
// if (totalSize + reclen >= Size)
// break;
// ent = (struct kdirent *)((uintptr_t)Buffer + totalSize);
// ent->d_ino = fileItr->first;
// ent->d_off = Offset++;
// ent->d_reclen = reclen;
// ent->d_type = IFTODT(StringToInt(fileItr->second->Header->mode));
// strncpy(ent->d_name,
// fileItr->second->Name.c_str(),
// strlen(fileItr->second->Name.c_str()));
// totalSize += reclen;
// fileItr++;
// }
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)
{
if (var->Node.Offset < Offset)
continue;
if (entries >= Entries)
break;
if (var->Deleted)
continue;
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;
switch (var->Header->typeflag[0])
{
case AREGTYPE:
case REGTYPE:
ent->d_type = DT_REG;
break;
case LNKTYPE:
fixme("Hard link not implemented for %s", var->Header->name);
ent->d_type = DT_LNK;
break;
case SYMTYPE:
ent->d_type = DT_LNK;
break;
case CHRTYPE:
ent->d_type = DT_CHR;
break;
case BLKTYPE:
ent->d_type = DT_BLK;
break;
case DIRTYPE:
ent->d_type = DT_DIR;
break;
case FIFOTYPE:
ent->d_type = DT_FIFO;
break;
case CONTTYPE:
default:
ent->d_type = 0;
break;
}
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;
}
int USTAR::SymLink(struct Inode *Node, const char *Name, const char *Target, struct Inode **Result)
{
int ret = this->Create(Node, Name, S_IFLNK, Result);
if (ret < 0)
return ret;
USTARInode *node = (USTARInode *)*Result;
FileHeader *hdr = node->Header;
strncpy(hdr->link, Target, MIN(sizeof(hdr->link) - 1, strlen(Target)));
return 0;
}
ssize_t USTAR::ReadLink(struct Inode *Node, char *Buffer, size_t Size)
{
auto fileItr = Files.find(Node->Index);
assert(fileItr != Files.end());
if (fileItr->second->Deleted)
return -ENOENT;
USTARInode *node = fileItr->second;
if (strlen(node->Header->link) > Size)
Size = strlen(node->Header->link);
strncpy(Buffer, node->Header->link, Size);
debug("Read %d bytes from %d", Size, Node->Index);
return Size;
}
int USTAR::Stat(struct Inode *Node, struct kstat *Stat)
{
auto fileItr = Files.find(Node->Index);
assert(fileItr != Files.end());
if (fileItr->second->Deleted)
return -ENOENT;
USTARInode *node = fileItr->second;
size_t fileSize = GetSize(node->Header->size);
debug("Header: \"%.*s\"", sizeof(struct FileHeader), node->Header);
Stat->Device = this->DeviceID;
Stat->Index = Node->Index;
Stat->HardLinks = 1;
Stat->UserID = GetSize(node->Header->uid);
Stat->GroupID = GetSize(node->Header->gid);
Stat->RawDevice = Stat->MakeDevice(GetSize(node->Header->dev_maj), GetSize(node->Header->dev_min));
Stat->Size = fileSize;
Stat->AccessTime = GetSize(node->Header->mtime);
Stat->ModifyTime = GetSize(node->Header->mtime);
Stat->ChangeTime = GetSize(node->Header->mtime);
Stat->BlockSize = 512;
Stat->Blocks = (fileSize + 511) / 512;
Stat->Attribute = 0;
mode_t hdrMode = StringToInt(node->Header->mode);
if (hdrMode & TSUID)
Stat->Mode |= S_ISUID;
else if (hdrMode & TSGID)
Stat->Mode |= S_ISGID;
else if (hdrMode & TSVTX)
Stat->Mode |= S_ISVTX;
else if (hdrMode & TUREAD)
Stat->Mode |= S_IRUSR;
else if (hdrMode & TUWRITE)
Stat->Mode |= S_IWUSR;
else if (hdrMode & TUEXEC)
Stat->Mode |= S_IXUSR;
else if (hdrMode & TGREAD)
Stat->Mode |= S_IRGRP;
else if (hdrMode & TGWRITE)
Stat->Mode |= S_IWGRP;
else if (hdrMode & TGEXEC)
Stat->Mode |= S_IXGRP;
else if (hdrMode & TOREAD)
Stat->Mode |= S_IROTH;
else if (hdrMode & TOWRITE)
Stat->Mode |= S_IWOTH;
else if (hdrMode & TOEXEC)
Stat->Mode |= S_IXOTH;
switch (node->Header->typeflag[0])
{
case AREGTYPE:
case REGTYPE:
Stat->Mode |= S_IFREG;
break;
case LNKTYPE:
fixme("Hard link not implemented for %s", node->Header->name);
Stat->Mode |= S_IFLNK;
break;
case SYMTYPE:
Stat->Mode |= S_IFLNK;
break;
case CHRTYPE:
Stat->Mode |= S_IFCHR;
break;
case BLKTYPE:
Stat->Mode |= S_IFBLK;
break;
case DIRTYPE:
Stat->Mode |= S_IFDIR;
break;
case FIFOTYPE:
Stat->Mode |= S_IFIFO;
break;
case CONTTYPE:
warn("Reserved type for %s", node->Header->name);
__fallthrough;
default:
error("Unknown type: %d for %s", node->Header->typeflag[0], node->Header->name);
break;
}
return 0;
}
bool USTAR::TestArchive(uintptr_t Address)
{
if (!Memory::Virtual().Check((void *)Address))
{
error("Address %#lx is not mapped!", Address);
return false;
}
FileHeader *header = (FileHeader *)Address;
if (strncmp(header->signature, TMAGIC, TMAGLEN) != 0)
{
error("Invalid signature!");
return false;
}
return true;
}
void USTAR::ReadArchive(uintptr_t Address, size_t Size)
{
trace("Initializing USTAR with address %#lx and size %d", Address, Size);
auto SetMode = [&](Inode &uNode, FileHeader *header)
{
mode_t hdrMode = StringToInt(header->mode);
if (hdrMode & TSUID)
uNode.Mode |= S_ISUID;
else if (hdrMode & TSGID)
uNode.Mode |= S_ISGID;
else if (hdrMode & TSVTX)
uNode.Mode |= S_ISVTX;
else if (hdrMode & TUREAD)
uNode.Mode |= S_IRUSR;
else if (hdrMode & TUWRITE)
uNode.Mode |= S_IWUSR;
else if (hdrMode & TUEXEC)
uNode.Mode |= S_IXUSR;
else if (hdrMode & TGREAD)
uNode.Mode |= S_IRGRP;
else if (hdrMode & TGWRITE)
uNode.Mode |= S_IWGRP;
else if (hdrMode & TGEXEC)
uNode.Mode |= S_IXGRP;
else if (hdrMode & TOREAD)
uNode.Mode |= S_IROTH;
else if (hdrMode & TOWRITE)
uNode.Mode |= S_IWOTH;
else if (hdrMode & TOEXEC)
uNode.Mode |= S_IXOTH;
switch (header->typeflag[0])
{
case AREGTYPE:
case REGTYPE:
uNode.Mode |= S_IFREG;
break;
case LNKTYPE:
uNode.Mode |= S_IFLNK;
break;
case SYMTYPE:
uNode.Mode |= S_IFLNK;
break;
case CHRTYPE:
uNode.Mode |= S_IFCHR;
break;
case BLKTYPE:
uNode.Mode |= S_IFBLK;
break;
case DIRTYPE:
uNode.Mode |= S_IFDIR;
break;
case FIFOTYPE:
uNode.Mode |= S_IFIFO;
break;
case CONTTYPE:
warn("Reserved type for %s", header->name);
__fallthrough;
default:
error("Unknown type: %d for %s", header->typeflag[0], header->name);
break;
}
};
FileHeader *header = (FileHeader *)Address;
debug("USTAR signature valid! Name:%s Signature:%s Mode:%d Size:%lu",
header->name, header->signature, StringToInt(header->mode), header->size);
Memory::Virtual vmm;
std::vector<USTARInode *> tmpNodes; /* FIXME: bug in unordered_map for iterators */
for (size_t i = 0;; i++)
{
if (!vmm.Check((void *)header))
{
error("Address %#lx is not mapped!", header);
return;
}
if (strncmp(header->signature, TMAGIC, TMAGLEN) != 0)
break;
// debug("\"%s\"", header->name);
/* This removes the "." at the beginning of the file name
"./foo/bar" > "/foo/bar" */
if (header->name[0] == '.' && header->name[1] == '/')
memmove(header->name, header->name + 1, strlen(header->name));
if (isempty((char *)header->name))
fixme("Ignoring empty file name \"%.*s\"", sizeof(struct FileHeader), header);
struct Inode uNode;
uNode.Device = this->DeviceID;
uNode.RawDevice = 0;
uNode.Index = NextInode;
SetMode(uNode, header);
uNode.Flags = I_FLAG_CACHE_KEEP;
uNode.Offset = 0;
uNode.PrivateData = this;
const char *basename;
size_t length;
cwk_path_get_basename(header->name, &basename, &length);
USTARInode *node = new USTARInode{.Node = uNode,
.Header = header,
.Parent = nullptr,
.Name{},
.Path{},
.Children{},
.Deleted = false,
.Checksum = INODE_CHECKSUM};
if (basename)
node->Name.assign(basename, length);
else
node->Name.assign((const char *)header->name, strlen(header->name));
node->Path.assign((const char *)header->name, strlen(header->name));
Files.insert(std::make_pair(NextInode, node));
tmpNodes.push_back(node);
size_t size = GetSize(header->size);
Address += ((size / 512) + 1) * 512;
if (size % 512)
Address += 512;
header = (FileHeader *)Address;
NextInode++;
}
/* TODO: This code can be significantly optimized but good luck understanding it */
USTARInode *parent = nullptr;
std::vector<USTARInode *> parentStack;
std::vector<std::string *> pathStack;
for (auto &file : tmpNodes)
{
if (file->Path == "/") /* This is root / */
{
parentStack.push_back(file);
pathStack.push_back(&file->Path);
// debug("root / generated");
continue;
}
/* pathStack is never empty */
if (file->Path.back() == '/') /* This is a directory */
{
const char *path = file->Path.c_str();
size_t length;
/* This converts /one/two/path.txt to /one/two/ */
cwk_path_get_dirname(path, &length);
std::string dirName(path, length);
/* Check if the directory is at the same level as the current directory */
if (dirName == *pathStack.back())
{
parent = parentStack.back();
parentStack.push_back(file);
pathStack.push_back(&file->Path);
parent->Children.push_back(file);
file->Parent = parent;
// debug("adding \"%s\" to \"%s\"", file->Path.c_str(), parent->Path.c_str());
continue;
}
else
{
/* Check if the directory is at a higher level */
for (size_t i = 0; i < parentStack.size(); i++)
{
if (dirName != *pathStack[i])
continue;
/* Adjust vectors */
while (!parentStack.empty())
{
if (dirName == *pathStack.back())
break;
// debug("popping \"%s\"", pathStack.back()->c_str());
parentStack.pop_back();
pathStack.pop_back();
}
parent = parentStack.back();
parentStack.push_back(file);
pathStack.push_back(&file->Path);
parent->Children.push_back(file);
file->Parent = parent;
// debug("adding \"%s\" to \"%s\"", file->Path.c_str(), parent->Path.c_str());
goto foundEnd;
}
// This is a new directory level
parentStack.pop_back();
pathStack.pop_back();
parent = parentStack.back();
parentStack.push_back(file);
pathStack.push_back(&file->Path);
parent->Children.push_back(file);
file->Parent = parent;
// debug("adding \"%s\" to \"%s\"", file->Path.c_str(), parent->Path.c_str());
foundEnd:
continue;
}
}
/* From here, it's a file */
const char *path = file->Path.c_str();
size_t length;
/* This converts /one/two/path.txt to /one/two/ */
cwk_path_get_dirname(path, &length);
std::string dirName(path, length);
/* Check if the file is at the same level as the current directory */
if (dirName == *pathStack.back())
{
parent = parentStack.back();
parent->Children.push_back(file);
file->Parent = parent;
// debug("adding \"%s\" to \"%s\"", file->Path.c_str(), parent->Path.c_str());
continue;
}
/* Check if the file is at a higher level */
for (size_t i = 0; i < parentStack.size(); i++)
{
if (dirName != *pathStack[i])
continue;
/* Adjust vectors */
while (!parentStack.empty())
{
if (dirName == *pathStack.back())
break;
// debug("popping \"%s\"", pathStack.back()->c_str());
parentStack.pop_back();
pathStack.pop_back();
}
parent = parentStack.back();
parent->Children.push_back(file);
file->Parent = parent;
// debug("adding \"%s\" to \"%s\"", file->Path.c_str(), parent->Path.c_str());
}
}
std::function<void(vfs::USTAR::USTARInode *, int, const std::string &)> ustarTree = [&](vfs::USTAR::USTARInode *node, int level, const std::string &prefix)
{
debug("%*s\"%s\"%ld", level * 4, prefix.c_str(), node->Name.c_str(), node->Node.Offset);
off_t offset = 2; /* 0 . | 1 .. */
for (auto &child : node->Children)
{
#ifdef DEBUG
if (offset <= 2)
{
if (offset == 2)
offset = 0;
/* Pseudo directories . and .. */
USTARInode pseudoDot{};
pseudoDot.Node = node->Node;
pseudoDot.Name = ".";
pseudoDot.Node.Offset = offset++;
USTARInode pseudoDDot{};
pseudoDDot.Node = node->Parent ? node->Parent->Node : node->Node;
pseudoDDot.Name = "..";
pseudoDDot.Node.Offset = offset++;
ustarTree(&pseudoDot, level + 1, "|-- ");
ustarTree(&pseudoDDot, level + 1, "|-- ");
}
#endif
child->Node.Offset = offset++;
ustarTree(child, level + 1, child == node->Children.back() ? "`-- " : "|-- ");
}
};
ustarTree(tmpNodes[0], 0, "");
}
}
O2 int __ustar_Lookup(struct Inode *Parent, const char *Name, struct Inode **Result)
{
return ((vfs::USTAR *)Parent->PrivateData)->Lookup(Parent, Name, Result);
}
O2 int __ustar_Create(struct Inode *Parent, const char *Name, mode_t Mode, struct Inode **Result)
{
return ((vfs::USTAR *)Parent->PrivateData)->Create(Parent, Name, Mode, Result);
}
O2 ssize_t __ustar_Read(struct Inode *Node, void *Buffer, size_t Size, off_t Offset)
{
return ((vfs::USTAR *)Node->PrivateData)->Read(Node, Buffer, Size, Offset);
}
O2 ssize_t __ustar_Readdir(struct Inode *Node, struct kdirent *Buffer, size_t Size, off_t Offset, off_t Entries)
{
return ((vfs::USTAR *)Node->PrivateData)->ReadDir(Node, Buffer, Size, Offset, Entries);
}
O2 int __ustar_SymLink(Inode *Parent, const char *Name, const char *Target, Inode **Result)
{
return ((vfs::USTAR *)Parent->PrivateData)->SymLink(Parent, Name, Target, Result);
}
O2 ssize_t __ustar_ReadLink(Inode *Node, char *Buffer, size_t Size)
{
return ((vfs::USTAR *)Node->PrivateData)->ReadLink(Node, Buffer, Size);
}
O2 int __ustar_Stat(struct Inode *Node, kstat *Stat)
{
return ((vfs::USTAR *)Node->PrivateData)->Stat(Node, Stat);
}
int __ustar_DestroyInode(FileSystemInfo *Info, Inode *Node)
{
((vfs::USTAR::USTARInode *)Node)->Deleted = true;
return 0;
}
int __ustar_Destroy(FileSystemInfo *fsi)
{
assert(fsi->PrivateData);
delete (vfs::USTAR *)fsi->PrivateData;
delete fsi;
return 0;
}
bool TestAndInitializeUSTAR(uintptr_t Address, size_t Size)
{
vfs::USTAR *ustar = new vfs::USTAR();
if (!ustar->TestArchive(Address))
{
delete ustar;
return false;
}
ustar->DeviceID = fs->EarlyReserveDevice();
ustar->ReadArchive(Address, Size);
Inode *initrd = nullptr;
ustar->Lookup(nullptr, "/", &initrd);
assert(initrd != nullptr);
FileSystemInfo *fsi = new FileSystemInfo;
fsi->Name = "ustar";
fsi->RootName = "/";
fsi->Flags = I_FLAG_ROOT | I_FLAG_MOUNTPOINT | I_FLAG_CACHE_KEEP;
fsi->SuperOps.DeleteInode = __ustar_DestroyInode;
fsi->SuperOps.Destroy = __ustar_Destroy;
fsi->Ops.Lookup = __ustar_Lookup;
fsi->Ops.Create = __ustar_Create;
fsi->Ops.Read = __ustar_Read;
fsi->Ops.ReadDir = __ustar_Readdir;
fsi->Ops.SymLink = __ustar_SymLink;
fsi->Ops.ReadLink = __ustar_ReadLink;
fsi->Ops.Stat = __ustar_Stat;
fsi->PrivateData = ustar;
fs->LateRegisterFileSystem(ustar->DeviceID, fsi, initrd);
fs->AddRoot(initrd);
return true;
}
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