62 lines
2.2 KiB
C++
62 lines
2.2 KiB
C++
#include <kernel/FS/ProcFS/Inode.h>
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namespace Kernel
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{
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BAN::ErrorOr<BAN::RefPtr<ProcPidInode>> ProcPidInode::create_new(Process& process, TmpFileSystem& fs, mode_t mode, uid_t uid, gid_t gid)
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{
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auto inode_info = create_inode_info(Mode::IFDIR | mode, uid, gid);
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auto* inode_ptr = new ProcPidInode(process, fs, inode_info);
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if (inode_ptr == nullptr)
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return BAN::Error::from_errno(ENOMEM);
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auto inode = BAN::RefPtr<ProcPidInode>::adopt(inode_ptr);
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TRY(inode->link_inode(*MUST(ProcROInode::create_new(process, &Process::proc_meminfo, fs, 0400, uid, gid)), "meminfo"sv));
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TRY(inode->link_inode(*MUST(ProcROInode::create_new(process, &Process::proc_cmdline, fs, 0400, uid, gid)), "cmdline"sv));
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TRY(inode->link_inode(*MUST(ProcROInode::create_new(process, &Process::proc_environ, fs, 0400, uid, gid)), "environ"sv));
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return inode;
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}
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ProcPidInode::ProcPidInode(Process& process, TmpFileSystem& fs, const TmpInodeInfo& inode_info)
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: TmpDirectoryInode(fs, MUST(fs.allocate_inode(inode_info)), inode_info)
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, m_process(process)
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{
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}
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void ProcPidInode::cleanup()
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{
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(void)TmpDirectoryInode::unlink_impl("meminfo"sv);
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(void)TmpDirectoryInode::unlink_impl("cmdline"sv);
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(void)TmpDirectoryInode::unlink_impl("environ"sv);
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}
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BAN::ErrorOr<BAN::RefPtr<ProcROInode>> ProcROInode::create_new(Process& process, size_t (Process::*callback)(off_t, BAN::ByteSpan) const, TmpFileSystem& fs, mode_t mode, uid_t uid, gid_t gid)
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{
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auto inode_info = create_inode_info(Mode::IFREG | mode, uid, gid);
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auto* inode_ptr = new ProcROInode(process, callback, fs, inode_info);
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if (inode_ptr == nullptr)
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return BAN::Error::from_errno(ENOMEM);
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return BAN::RefPtr<ProcROInode>::adopt(inode_ptr);
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}
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ProcROInode::ProcROInode(Process& process, size_t (Process::*callback)(off_t, BAN::ByteSpan) const, TmpFileSystem& fs, const TmpInodeInfo& inode_info)
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: TmpInode(fs, MUST(fs.allocate_inode(inode_info)), inode_info)
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, m_process(process)
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, m_callback(callback)
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{
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m_inode_info.mode |= Inode::Mode::IFREG;
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}
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BAN::ErrorOr<size_t> ProcROInode::read_impl(off_t offset, BAN::ByteSpan buffer)
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{
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ASSERT(offset >= 0);
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if ((size_t)offset >= sizeof(proc_meminfo_t))
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return 0;
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return (m_process.*m_callback)(offset, buffer);
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}
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}
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