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Add sync() syscall and a /bin/sync.

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It walks all the live Inode objects and flushes pending metadata changes
wherever needed.

This could be optimized by keeping a separate list of dirty Inodes,
but let's not get ahead of ourselves.
This commit is contained in:
Andreas Kling
2018-12-20 00:39:29 +01:00
parent d0f06e5f3f
commit ed7ae6c02c
14 changed files with 78 additions and 24 deletions
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7
VirtualFileSystem/FileSystem.h
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@@ -26,6 +26,7 @@ public:
dword id() const { return m_fsid; }
static FS* from_fsid(dword);
static void sync();
virtual bool initialize() = 0;
virtual const char* class_name() const = 0;
@@ -98,11 +99,7 @@ public:
void will_be_destroyed();
protected:
Inode(FS& fs, unsigned index)
: m_fs(fs)
, m_index(index)
{
}
Inode(FS& fs, unsigned index);
virtual void populate_metadata() const = 0;
void set_metadata_dirty(bool b) { m_metadata_dirty = b; }