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Kernel: Add support for device nodes in TmpFS

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Later on we will remove the DevTmpFS code, so in order to support
mounting TmpFS instead, we need to be able to create device nodes on
the filesystem.
This commit is contained in:
Liav A 2022-10-21 18:39:41 +03:00 committed by Linus Groh
parent 5edd4bd512
commit c2b5c5bac5
Notes: sideshowbarker 2024-07-17 05:13:18 +09:00 
Author: https://github.com/supercomputer7
Commit: https://github.com/SerenityOS/serenity/commit/c2b5c5bac5
Pull-request: https://github.com/SerenityOS/serenity/pull/15741
Reviewed-by: https://github.com/gmta ✅
Reviewed-by: https://github.com/kleinesfilmroellchen ✅
1 changed files with 2 additions and 5 deletions
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7
Kernel/FileSystem/TmpFS.cpp
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@ -294,11 +294,6 @@ ErrorOr<void> TmpFSInode::chown(UserID uid, GroupID gid)
ErrorOr<NonnullLockRefPtr<Inode>> TmpFSInode::create_child(StringView name, mode_t mode, dev_t dev, UserID uid, GroupID gid)
{
MutexLocker locker(m_inode_lock);
// TODO: Support creating devices on TmpFS.
if (dev != 0)
return ENOTSUP;
time_t now = kgettimeofday().to_truncated_seconds();
InodeMetadata metadata;
@ -308,6 +303,8 @@ ErrorOr<NonnullLockRefPtr<Inode>> TmpFSInode::create_child(StringView name, mode
metadata.atime = now;
metadata.ctime = now;
metadata.mtime = now;
metadata.major_device = major_from_encoded_device(dev);
metadata.minor_device = minor_from_encoded_device(dev);
auto child = TRY(TmpFSInode::try_create(fs(), metadata, *this));
TRY(add_child(*child, name, mode));