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Kernel+Userland: Support remounting filesystems :^)

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This makes it possible to change flags of a mount after the fact, with the
caveats outlined in the man page.
This commit is contained in:
Sergey Bugaev
2020-05-28 21:12:13 +03:00
committed by Andreas Kling
parent d395b93b15
commit 3847d00727
8 changed files with 58 additions and 0 deletions
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5
Kernel/Process.cpp
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@@ -4103,6 +4103,11 @@ int Process::sys$mount(const Syscall::SC_mount_params* user_params)
auto& target_custody = custody_or_error.value();
if (params.flags & MS_REMOUNT) {
// We're not creating a new mount, we're updating an existing one!
return VFS::the().remount(target_custody, params.flags & ~MS_REMOUNT);
}
if (params.flags & MS_BIND) {
// We're doing a bind mount.
if (description.is_null())