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Kernel/SysFS: Add Symbolic link functionality to the filesystem

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This will be used later on to help connecting a node at /sys/dev/block/
that represents a Storage device to a directory in /sys/devices/storage/
with details on that device in that directory.
This commit is contained in:
Liav A 2022-04-22 20:35:15 +03:00 • committed by Andreas Kling
parent 7e88bbe550
commit ecc29bb52e
4 changed files with 104 additions and 0 deletions
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25
Kernel/FileSystem/SysFS.cpp
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@ -131,6 +131,31 @@ ErrorOr<void> SysFSInode::truncate(u64 size)
return m_associated_component->truncate(size);
}
ErrorOr<NonnullRefPtr<SysFSLinkInode>> SysFSLinkInode::try_create(SysFS const& sysfs, SysFSComponent const& component)
{
return adopt_nonnull_ref_or_enomem(new (nothrow) SysFSLinkInode(sysfs, component));
}
SysFSLinkInode::SysFSLinkInode(SysFS const& fs, SysFSComponent const& component)
: SysFSInode(fs, component)
{
}
SysFSLinkInode::~SysFSLinkInode() = default;
InodeMetadata SysFSLinkInode::metadata() const
{
// NOTE: No locking required as m_associated_component or its component index will never change during our lifetime.
InodeMetadata metadata;
metadata.inode = { fsid(), m_associated_component->component_index() };
metadata.mode = S_IFLNK | S_IRUSR | S_IRGRP | S_IROTH | S_IXOTH;
metadata.uid = 0;
metadata.gid = 0;
metadata.size = 0;
metadata.mtime = TimeManagement::boot_time();
return metadata;
}
ErrorOr<NonnullRefPtr<SysFSDirectoryInode>> SysFSDirectoryInode::try_create(SysFS const& sysfs, SysFSComponent const& component)
{
return adopt_nonnull_ref_or_enomem(new (nothrow) SysFSDirectoryInode(sysfs, component));