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Kernel+Userland: Split bind-mounting and re-mounting from mount syscall

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These 2 are an actual separate types of syscalls, so let's stop using
special flags for bind mounting or re-mounting and instead let userspace
calling directly for this kind of actions.
This commit is contained in:
Liav A 2023-02-25 19:30:28 +02:00 • committed by Andrew Kaster
parent 04b44a827a
commit 0bbd9040ef
10 changed files with 204 additions and 42 deletions
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27
Userland/Libraries/LibCore/System.cpp
View file

@ -232,6 +232,33 @@ ErrorOr<void> ptrace_peekbuf(pid_t tid, void const* tracee_addr, Bytes destinati
HANDLE_SYSCALL_RETURN_VALUE("ptrace_peekbuf", rc, {});
}
ErrorOr<void> bindmount(int source_fd, StringView target, int flags)
{
if (target.is_null())
return Error::from_errno(EFAULT);
Syscall::SC_bindmount_params params {
{ target.characters_without_null_termination(), target.length() },
source_fd,
flags,
};
int rc = syscall(SC_bindmount, &params);
HANDLE_SYSCALL_RETURN_VALUE("bindmount", rc, {});
}
ErrorOr<void> remount(StringView target, int flags)
{
if (target.is_null())
return Error::from_errno(EFAULT);
Syscall::SC_remount_params params {
{ target.characters_without_null_termination(), target.length() },
flags
};
int rc = syscall(SC_remount, &params);
HANDLE_SYSCALL_RETURN_VALUE("remount", rc, {});
}
ErrorOr<void> mount(int source_fd, StringView target, StringView fs_type, int flags)
{
if (target.is_null() || fs_type.is_null())

2
Userland/Libraries/LibCore/System.h
View file

@ -59,6 +59,8 @@ ErrorOr<void> sendfd(int sockfd, int fd);
ErrorOr<int> recvfd(int sockfd, int options);
ErrorOr<void> ptrace_peekbuf(pid_t tid, void const* tracee_addr, Bytes destination_buf);
ErrorOr<void> mount(int source_fd, StringView target, StringView fs_type, int flags);
ErrorOr<void> bindmount(int source_fd, StringView target, int flags);
ErrorOr<void> remount(StringView target, int flags);
ErrorOr<void> umount(StringView mount_point);
ErrorOr<long> ptrace(int request, pid_t tid, void* address, void* data);
ErrorOr<void> disown(pid_t pid);