Kernel: Make Inode::set_{a,c,m}time return KResult

This exposed some missing error propagation, which this patch also
takes care of.

Kernel/FileSystem/Ext2FileSystem.cpp

@@ -1584,34 +1584,34 @@ void Ext2FSInode::one_ref_left()
     // FIXME: I would like to not live forever, but uncached Ext2FS is fucking painful right now.
 }
 
-int Ext2FSInode::set_atime(time_t t)
+KResult Ext2FSInode::set_atime(time_t t)
 {
     Locker locker(m_lock);
     if (fs().is_readonly())
-        return -EROFS;
+        return EROFS;
     m_raw_inode.i_atime = t;
     set_metadata_dirty(true);
-    return 0;
+    return KSuccess;
 }
 
-int Ext2FSInode::set_ctime(time_t t)
+KResult Ext2FSInode::set_ctime(time_t t)
 {
     Locker locker(m_lock);
     if (fs().is_readonly())
-        return -EROFS;
+        return EROFS;
     m_raw_inode.i_ctime = t;
     set_metadata_dirty(true);
-    return 0;
+    return KSuccess;
 }
 
-int Ext2FSInode::set_mtime(time_t t)
+KResult Ext2FSInode::set_mtime(time_t t)
 {
     Locker locker(m_lock);
     if (fs().is_readonly())
-        return -EROFS;
+        return EROFS;
     m_raw_inode.i_mtime = t;
     set_metadata_dirty(true);
-    return 0;
+    return KSuccess;
 }
 
 KResult Ext2FSInode::increment_link_count()

Kernel/FileSystem/Ext2FileSystem.h

@@ -47,9 +47,9 @@ private:
     virtual KResultOr<NonnullRefPtr<Inode>> create_child(const String& name, mode_t, dev_t, uid_t, gid_t) override;
     virtual KResult add_child(Inode& child, const StringView& name, mode_t) override;
     virtual KResult remove_child(const StringView& name) override;
-    virtual int set_atime(time_t) override;
-    virtual int set_ctime(time_t) override;
-    virtual int set_mtime(time_t) override;
+    virtual KResult set_atime(time_t) override;
+    virtual KResult set_ctime(time_t) override;
+    virtual KResult set_mtime(time_t) override;
     virtual KResult increment_link_count() override;
     virtual KResult decrement_link_count() override;
     virtual KResultOr<size_t> directory_entry_count() const override;

Kernel/FileSystem/Inode.cpp

@@ -117,19 +117,19 @@ void Inode::will_be_destroyed()
         flush_metadata();
 }
 
-int Inode::set_atime(time_t)
+KResult Inode::set_atime(time_t)
 {
-    return -ENOTIMPL;
+    return ENOTIMPL;
 }
 
-int Inode::set_ctime(time_t)
+KResult Inode::set_ctime(time_t)
 {
-    return -ENOTIMPL;
+    return ENOTIMPL;
 }
 
-int Inode::set_mtime(time_t)
+KResult Inode::set_mtime(time_t)
 {
-    return -ENOTIMPL;
+    return ENOTIMPL;
 }
 
 KResult Inode::increment_link_count()

Kernel/FileSystem/Inode.h

@@ -76,9 +76,9 @@ public:
 
     bool is_metadata_dirty() const { return m_metadata_dirty; }
 
-    virtual int set_atime(time_t);
-    virtual int set_ctime(time_t);
-    virtual int set_mtime(time_t);
+    virtual KResult set_atime(time_t);
+    virtual KResult set_ctime(time_t);
+    virtual KResult set_mtime(time_t);
     virtual KResult increment_link_count();
     virtual KResult decrement_link_count();
 

Kernel/FileSystem/InodeFile.cpp

@@ -48,9 +48,11 @@ KResultOr<size_t> InodeFile::write(FileDescription& description, u64 offset, con
 
     ssize_t nwritten = m_inode->write_bytes(offset, count, data, &description);
     if (nwritten > 0) {
-        m_inode->set_mtime(kgettimeofday().to_truncated_seconds());
+        auto mtime_result = m_inode->set_mtime(kgettimeofday().to_truncated_seconds());
         Thread::current()->did_file_write(nwritten);
         evaluate_block_conditions();
+        if (mtime_result.is_error())
+            return mtime_result;
     }
     if (nwritten < 0)
         return KResult((ErrnoCode)-nwritten);
@@ -109,12 +111,10 @@ String InodeFile::absolute_path(const FileDescription& description) const
 
 KResult InodeFile::truncate(u64 size)
 {
-    auto truncate_result = m_inode->truncate(size);
-    if (truncate_result.is_error())
-        return truncate_result;
-    int mtime_result = m_inode->set_mtime(kgettimeofday().to_truncated_seconds());
-    if (mtime_result < 0)
-        return KResult((ErrnoCode)-mtime_result);
+    if (auto result = m_inode->truncate(size); result.is_error())
+        return result;
+    if (auto result = m_inode->set_mtime(kgettimeofday().to_truncated_seconds()); result.is_error())
+        return result;
     return KSuccess;
 }
 

Kernel/FileSystem/TmpFS.cpp

@@ -335,7 +335,7 @@ KResult TmpFSInode::truncate(u64 size)
     return KSuccess;
 }
 
-int TmpFSInode::set_atime(time_t time)
+KResult TmpFSInode::set_atime(time_t time)
 {
     Locker locker(m_lock);
 
@@ -345,7 +345,7 @@ int TmpFSInode::set_atime(time_t time)
     return KSuccess;
 }
 
-int TmpFSInode::set_ctime(time_t time)
+KResult TmpFSInode::set_ctime(time_t time)
 {
     Locker locker(m_lock);
 
@@ -354,11 +354,11 @@ int TmpFSInode::set_ctime(time_t time)
     return KSuccess;
 }
 
-int TmpFSInode::set_mtime(time_t time)
+KResult TmpFSInode::set_mtime(time_t t)
 {
     Locker locker(m_lock);
 
-    m_metadata.mtime = time;
+    m_metadata.mtime = t;
     notify_watchers();
     return KSuccess;
 }

Kernel/FileSystem/TmpFS.h

@@ -67,9 +67,9 @@ public:
     virtual KResult chmod(mode_t) override;
     virtual KResult chown(uid_t, gid_t) override;
     virtual KResult truncate(u64) override;
-    virtual int set_atime(time_t) override;
-    virtual int set_ctime(time_t) override;
-    virtual int set_mtime(time_t) override;
+    virtual KResult set_atime(time_t) override;
+    virtual KResult set_ctime(time_t) override;
+    virtual KResult set_mtime(time_t) override;
     virtual void one_ref_left() override;
 
 private:

Kernel/FileSystem/VirtualFileSystem.cpp

@@ -209,12 +209,10 @@ KResult VFS::utime(StringView path, Custody& base, time_t atime, time_t mtime)
     if (custody.is_readonly())
         return EROFS;
 
-    int error = inode.set_atime(atime);
-    if (error < 0)
-        return KResult((ErrnoCode)-error);
-    error = inode.set_mtime(mtime);
-    if (error < 0)
-        return KResult((ErrnoCode)-error);
+    if (auto result = inode.set_atime(atime); result.is_error())
+        return result;
+    if (auto result = inode.set_mtime(mtime); result.is_error())
+        return result;
     return KSuccess;
 }
 
@@ -319,10 +317,10 @@ KResultOr<NonnullRefPtr<FileDescription>> VFS::open(StringView path, int options
         return EROFS;
 
     if (should_truncate_file) {
-        KResult result = inode.truncate(0);
-        if (result.is_error())
+        if (auto result = inode.truncate(0); result.is_error())
+            return result;
+        if (auto result = inode.set_mtime(kgettimeofday().to_truncated_seconds()); result.is_error())
             return result;
-        inode.set_mtime(kgettimeofday().to_truncated_seconds());
     }
     auto description = FileDescription::create(custody);
     if (!description.is_error()) {