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Kernel: Change Inode::{read/write}_bytes interface to KResultOr<ssize_t>

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The error handling in all these cases was still using the old style
negative values to indicate errors. We have a nicer solution for this
now with KResultOr<T>. This change switches the interface and then all
implementers to use the new style.
This commit is contained in:
Brian Gianforcaro 2021-05-01 14:29:39 -07:00 • committed by Andreas Kling
parent de9b454f89
commit 234c6ae32d
18 changed files with 88 additions and 82 deletions
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12
Kernel/FileSystem/DevFS.h
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@ -57,11 +57,11 @@ public:
protected:
DevFSInode(DevFS&);
virtual ssize_t read_bytes(off_t, ssize_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
virtual KResultOr<ssize_t> read_bytes(off_t, ssize_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
virtual KResult traverse_as_directory(Function<bool(const FS::DirectoryEntryView&)>) const override;
virtual RefPtr<Inode> lookup(StringView name) override;
virtual void flush_metadata() override;
virtual ssize_t write_bytes(off_t, ssize_t, const UserOrKernelBuffer& buffer, FileDescription*) override;
virtual KResultOr<ssize_t> write_bytes(off_t, ssize_t, const UserOrKernelBuffer& buffer, FileDescription*) override;
virtual KResultOr<NonnullRefPtr<Inode>> create_child(const String& name, mode_t, dev_t, uid_t, gid_t) override;
virtual KResult add_child(Inode&, const StringView& name, mode_t) override;
virtual KResult remove_child(const StringView& name) override;
@ -83,9 +83,9 @@ private:
String determine_name() const;
DevFSDeviceInode(DevFS&, const Device&);
// ^Inode
virtual ssize_t read_bytes(off_t, ssize_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
virtual KResultOr<ssize_t> read_bytes(off_t, ssize_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
virtual InodeMetadata metadata() const override;
virtual ssize_t write_bytes(off_t, ssize_t, const UserOrKernelBuffer& buffer, FileDescription*) override;
virtual KResultOr<ssize_t> write_bytes(off_t, ssize_t, const UserOrKernelBuffer& buffer, FileDescription*) override;
virtual KResult chown(uid_t, gid_t) override;
NonnullRefPtr<Device> m_attached_device;
@ -106,9 +106,9 @@ public:
protected:
DevFSLinkInode(DevFS&, String);
// ^Inode
virtual ssize_t read_bytes(off_t, ssize_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
virtual KResultOr<ssize_t> read_bytes(off_t, ssize_t, UserOrKernelBuffer& buffer, FileDescription*) const override;
virtual InodeMetadata metadata() const override;
virtual ssize_t write_bytes(off_t, ssize_t, const UserOrKernelBuffer& buffer, FileDescription*) override;
virtual KResultOr<ssize_t> write_bytes(off_t, ssize_t, const UserOrKernelBuffer& buffer, FileDescription*) override;
const String m_name;
String m_link;