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Kernel: Added unmount ability to VFS

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It is now possible to unmount file systems from the VFS via `umount`.
It works via looking up the `fsid` of the filesystem from the `Inode`'s
metatdata so I'm not sure how fragile it is. It seems to work for now
though as something to get us going.
This commit is contained in:
Jesse Buhagiar 2019-08-11 23:56:39 +10:00 • committed by Andreas Kling
parent f7251c74a9
commit bc22456f89
13 changed files with 98 additions and 3 deletions
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13
Kernel/FileSystem/Ext2FileSystem.cpp
View file

@ -1395,3 +1395,16 @@ unsigned Ext2FS::free_inode_count() const
LOCKER(m_lock);
return super_block().s_free_inodes_count;
}
KResult Ext2FS::prepare_to_unmount() const
{
LOCKER(m_lock); // Acquire lock for this FS
for (auto it = m_inode_cache.begin(); it != m_inode_cache.end(); ++it) {
if (it->value.ptr()->ref_count() > 1)
return KResult(-EBUSY);
}
dbg() << "here!";
m_inode_cache.clear();
return KSuccess;
}