69 lines
1.8 KiB
C++
69 lines
1.8 KiB
C++
#include <kernel/FS/ProcFS/FileSystem.h>
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#include <kernel/FS/ProcFS/Inode.h>
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namespace Kernel
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{
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static ProcFileSystem* s_instance = nullptr;
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void ProcFileSystem::initialize()
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{
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ASSERT(s_instance == nullptr);
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s_instance = new ProcFileSystem();
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ASSERT(s_instance);
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MUST(s_instance->TmpFileSystem::initialize(0555, 0, 0));
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auto meminfo_inode = MUST(ProcROInode::create_new(
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[](off_t offset, BAN::ByteSpan buffer) -> size_t
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{
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ASSERT(offset >= 0);
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if ((size_t)offset >= sizeof(full_meminfo_t))
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return 0;
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full_meminfo_t meminfo;
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meminfo.page_size = PAGE_SIZE;
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meminfo.free_pages = Heap::get().free_pages();
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meminfo.used_pages = Heap::get().used_pages();
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size_t bytes = BAN::Math::min<size_t>(sizeof(full_meminfo_t) - offset, buffer.size());
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memcpy(buffer.data(), (uint8_t*)&meminfo + offset, bytes);
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return bytes;
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},
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*s_instance, 0444, 0, 0
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));
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MUST(static_cast<TmpDirectoryInode*>(s_instance->root_inode().ptr())->link_inode(*meminfo_inode, "meminfo"_sv));
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}
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ProcFileSystem& ProcFileSystem::get()
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{
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ASSERT(s_instance);
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return *s_instance;
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}
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ProcFileSystem::ProcFileSystem()
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: TmpFileSystem(-1)
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{
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}
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BAN::ErrorOr<void> ProcFileSystem::on_process_create(Process& process)
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{
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auto path = TRY(BAN::String::formatted("{}", process.pid()));
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auto inode = TRY(ProcPidInode::create_new(process, *this, 0555));
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TRY(static_cast<TmpDirectoryInode*>(root_inode().ptr())->link_inode(*inode, path));
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return {};
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}
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void ProcFileSystem::on_process_delete(Process& process)
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{
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auto path = MUST(BAN::String::formatted("{}", process.pid()));
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auto inode = MUST(root_inode()->find_inode(path));
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static_cast<ProcPidInode*>(inode.ptr())->cleanup();
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if (auto ret = root_inode()->unlink(path); ret.is_error())
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dwarnln("{}", ret.error());
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}
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}
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